SemaTemplateDeduction.cpp revision a2c3646c35dd09d21b74826240aa916545b1873f
10b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor//===------- SemaTemplateDeduction.cpp - Template Argument Deduction ------===/ 20b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// 30b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// The LLVM Compiler Infrastructure 40b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// 50b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// This file is distributed under the University of Illinois Open Source 60b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// License. See LICENSE.TXT for details. 70b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor//===----------------------------------------------------------------------===/ 80b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// 90b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// This file implements C++ template argument deduction. 100b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor// 110b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor//===----------------------------------------------------------------------===/ 120b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 132a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall#include "clang/Sema/TemplateDeduction.h" 1455fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "TreeTransform.h" 150b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/ASTContext.h" 167cd088e519d7e6caa4c4c12db52e0e4ae35d25c2John McCall#include "clang/AST/DeclObjC.h" 170b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/DeclTemplate.h" 180b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/Expr.h" 190b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/ExprCXX.h" 2055fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/AST/StmtVisitor.h" 2155fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Sema/DeclSpec.h" 2255fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Sema/Sema.h" 2355fc873017f10f6f566b182b70f6fc22aefa3464Chandler Carruth#include "clang/Sema/Template.h" 24013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer#include "llvm/ADT/SmallBitVector.h" 258a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor#include <algorithm> 26508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor 27508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregornamespace clang { 282a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall using namespace sema; 292a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall 30508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Various flags that control template argument deduction. 31508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// 32508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// These flags can be bitwise-OR'd together. 33508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor enum TemplateDeductionFlags { 34508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief No template argument deduction flags, which indicates the 35508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// strictest results for template argument deduction (as used for, e.g., 36508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// matching class template partial specializations). 37508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF_None = 0, 38508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Within template argument deduction from a function call, we are 39508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// matching with a parameter type for which the original parameter was 40508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// a reference. 41508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF_ParamWithReferenceType = 0x1, 42508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Within template argument deduction from a function call, we 43508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// are matching in a case where we ignore cv-qualifiers. 44508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF_IgnoreQualifiers = 0x02, 45508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Within template argument deduction from a function call, 46508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// we are matching in a case where we can perform template argument 474112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor /// deduction from a template-id of a derived class of the argument type. 481282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor TDF_DerivedClass = 0x04, 491282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor /// \brief Allow non-dependent types to differ, e.g., when performing 501282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor /// template argument deduction from a function call where conversions 511282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor /// may apply. 5273b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor TDF_SkipNonDependent = 0x08, 5373b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor /// \brief Whether we are performing template argument deduction for 54dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi /// parameters and arguments in a top-level template argument 55092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor TDF_TopLevelParameterTypeList = 0x10, 56092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor /// \brief Within template argument deduction from overload resolution per 57092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor /// C++ [over.over] allow matching function types that are compatible in 58092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor /// terms of noreturn and default calling convention adjustments. 59092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor TDF_InOverloadResolution = 0x20 60508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor }; 61508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor} 62508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor 630b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregorusing namespace clang; 640b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 659d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor/// \brief Compare two APSInts, extending and switching the sign as 669d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor/// necessary to compare their values regardless of underlying type. 679d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregorstatic bool hasSameExtendedValue(llvm::APSInt X, llvm::APSInt Y) { 689d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if (Y.getBitWidth() > X.getBitWidth()) 699f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad X = X.extend(Y.getBitWidth()); 709d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor else if (Y.getBitWidth() < X.getBitWidth()) 719f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Y = Y.extend(X.getBitWidth()); 729d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 739d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor // If there is a signedness mismatch, correct it. 749d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if (X.isSigned() != Y.isSigned()) { 759d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor // If the signed value is negative, then the values cannot be the same. 769d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if ((Y.isSigned() && Y.isNegative()) || (X.isSigned() && X.isNegative())) 779d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor return false; 789d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 799d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Y.setIsSigned(true); 809d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor X.setIsSigned(true); 819d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor } 829d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 839d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor return X == Y; 849d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor} 859d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 86f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 87a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 88f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateParameterList *TemplateParams, 89f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor const TemplateArgument &Param, 9077d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor TemplateArgument Arg, 912a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 925f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced); 93d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor 94b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor/// \brief Whether template argument deduction for two reference parameters 95b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor/// resulted in the argument type, parameter type, or neither type being more 96b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor/// qualified than the other. 97dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumienum DeductionQualifierComparison { 98dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NeitherMoreQualified = 0, 99dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ParamMoreQualified, 100dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ArgMoreQualified 1015c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor}; 1025c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor 103b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor/// \brief Stores the result of comparing two reference parameters while 104b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor/// performing template argument deduction for partial ordering of function 105dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// templates. 106b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregorstruct RefParamPartialOrderingComparison { 107b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor /// \brief Whether the parameter type is an rvalue reference type. 108b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor bool ParamIsRvalueRef; 109b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor /// \brief Whether the argument type is an rvalue reference type. 110b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor bool ArgIsRvalueRef; 111dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 112b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor /// \brief Whether the parameter or argument (or neither) is more qualified. 113b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor DeductionQualifierComparison Qualifiers; 114b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor}; 115b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor 116b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor 1175c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor 11820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregorstatic Sema::TemplateDeductionResult 119bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian RedlDeduceTemplateArgumentsByTypeMatch(Sema &S, 120bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl TemplateParameterList *TemplateParams, 121bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl QualType Param, 122bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl QualType Arg, 123bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl TemplateDeductionInfo &Info, 124bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl SmallVectorImpl<DeducedTemplateArgument> & 125bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Deduced, 126bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl unsigned TDF, 127bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl bool PartialOrdering = false, 128bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl SmallVectorImpl<RefParamPartialOrderingComparison> * 129b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor RefParamComparisons = 0); 130603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor 131603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregorstatic Sema::TemplateDeductionResult 132603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas GregorDeduceTemplateArguments(Sema &S, 133603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor TemplateParameterList *TemplateParams, 13420a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor const TemplateArgument *Params, unsigned NumParams, 13520a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor const TemplateArgument *Args, unsigned NumArgs, 13620a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor TemplateDeductionInfo &Info, 137030a6644f253818b81b4d8a7fc1770c0a3d35474Richard Smith SmallVectorImpl<DeducedTemplateArgument> &Deduced); 13820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor 139199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// \brief If the given expression is of a form that permits the deduction 140199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// of a non-type template parameter, return the declaration of that 141199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// non-type template parameter. 142199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregorstatic NonTypeTemplateParmDecl *getDeducedParameterFromExpr(Expr *E) { 1435a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith // If we are within an alias template, the expression may have undergone 1445a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith // any number of parameter substitutions already. 1455a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith while (1) { 1465a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith if (ImplicitCastExpr *IC = dyn_cast<ImplicitCastExpr>(E)) 1475a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith E = IC->getSubExpr(); 1485a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith else if (SubstNonTypeTemplateParmExpr *Subst = 1495a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith dyn_cast<SubstNonTypeTemplateParmExpr>(E)) 1505a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith E = Subst->getReplacement(); 1515a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith else 1525a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith break; 1535a343d7856e5de04fd92b6192e94becddf541e3eRichard Smith } 1541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 155199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 156199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor return dyn_cast<NonTypeTemplateParmDecl>(DRE->getDecl()); 1571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 158199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor return 0; 159199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor} 160199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 1610d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor/// \brief Determine whether two declaration pointers refer to the same 1620d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor/// declaration. 1630d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregorstatic bool isSameDeclaration(Decl *X, Decl *Y) { 1640d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (NamedDecl *NX = dyn_cast<NamedDecl>(X)) 1650d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor X = NX->getUnderlyingDecl(); 1660d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (NamedDecl *NY = dyn_cast<NamedDecl>(Y)) 1670d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Y = NY->getUnderlyingDecl(); 168dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1690d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return X->getCanonicalDecl() == Y->getCanonicalDecl(); 1700d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor} 1710d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor 1720d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor/// \brief Verify that the given, deduced template arguments are compatible. 1730d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor/// 1740d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor/// \returns The deduced template argument, or a NULL template argument if 1750d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor/// the deduced template arguments were incompatible. 176dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumistatic DeducedTemplateArgument 1770d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas GregorcheckDeducedTemplateArguments(ASTContext &Context, 1780d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor const DeducedTemplateArgument &X, 1790d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor const DeducedTemplateArgument &Y) { 1800d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // We have no deduction for one or both of the arguments; they're compatible. 1810d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (X.isNull()) 1820d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return Y; 1830d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.isNull()) 184dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return X; 1850d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor 1860d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor switch (X.getKind()) { 1870d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor case TemplateArgument::Null: 1880d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor llvm_unreachable("Non-deduced template arguments handled above"); 1890d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor 1900d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor case TemplateArgument::Type: 1910d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // If two template type arguments have the same type, they're compatible. 1920d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Type && 1930d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Context.hasSameType(X.getAsType(), Y.getAsType())) 1940d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return X; 195dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1960d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return DeducedTemplateArgument(); 197dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1980d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor case TemplateArgument::Integral: 1990d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // If we deduced a constant in one case and either a dependent expression or 2000d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // declaration in another case, keep the integral constant. 2010d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // If both are integral constants with the same value, keep that value. 2020d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Expression || 2030d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Y.getKind() == TemplateArgument::Declaration || 2040d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor (Y.getKind() == TemplateArgument::Integral && 205855243789cb44799c03f4c7216d3d6308805f549Benjamin Kramer hasSameExtendedValue(X.getAsIntegral(), Y.getAsIntegral()))) 206dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeducedTemplateArgument(X, 2070d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor X.wasDeducedFromArrayBound() && 2080d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Y.wasDeducedFromArrayBound()); 2090d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor 2100d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // All other combinations are incompatible. 2110d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return DeducedTemplateArgument(); 212dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2130d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor case TemplateArgument::Template: 2140d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Template && 2150d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Context.hasSameTemplateName(X.getAsTemplate(), Y.getAsTemplate())) 2160d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return X; 217dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2180d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // All other combinations are incompatible. 219dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeducedTemplateArgument(); 220a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor 221a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor case TemplateArgument::TemplateExpansion: 222a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor if (Y.getKind() == TemplateArgument::TemplateExpansion && 223dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Context.hasSameTemplateName(X.getAsTemplateOrTemplatePattern(), 224a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor Y.getAsTemplateOrTemplatePattern())) 225a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor return X; 226dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 227a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor // All other combinations are incompatible. 228dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeducedTemplateArgument(); 229a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor 2300d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor case TemplateArgument::Expression: 231dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we deduced a dependent expression in one case and either an integral 232dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // constant or a declaration in another case, keep the integral constant 2330d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // or declaration. 2340d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Integral || 2350d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Y.getKind() == TemplateArgument::Declaration) 2360d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return DeducedTemplateArgument(Y, X.wasDeducedFromArrayBound() && 2370d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Y.wasDeducedFromArrayBound()); 238dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2390d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Expression) { 2400d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // Compare the expressions for equality 2410d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor llvm::FoldingSetNodeID ID1, ID2; 2420d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor X.getAsExpr()->Profile(ID1, Context, true); 2430d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Y.getAsExpr()->Profile(ID2, Context, true); 2440d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (ID1 == ID2) 2450d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return X; 2460d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor } 247dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2480d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // All other combinations are incompatible. 2490d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return DeducedTemplateArgument(); 250dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2510d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor case TemplateArgument::Declaration: 2520d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // If we deduced a declaration and a dependent expression, keep the 2530d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // declaration. 2540d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Expression) 2550d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return X; 256dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2570d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // If we deduced a declaration and an integral constant, keep the 2580d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // integral constant. 2590d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Integral) 2600d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return Y; 261dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2620d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // If we deduced two declarations, make sure they they refer to the 2630d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // same declaration. 2640d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() == TemplateArgument::Declaration && 265d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman isSameDeclaration(X.getAsDecl(), Y.getAsDecl()) && 266d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman X.isDeclForReferenceParam() == Y.isDeclForReferenceParam()) 267d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return X; 268d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 269d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman // All other combinations are incompatible. 270d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return DeducedTemplateArgument(); 271d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 272d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman case TemplateArgument::NullPtr: 273d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman // If we deduced a null pointer and a dependent expression, keep the 274d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman // null pointer. 275d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman if (Y.getKind() == TemplateArgument::Expression) 276d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return X; 277d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 278d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman // If we deduced a null pointer and an integral constant, keep the 279d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman // integral constant. 280d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman if (Y.getKind() == TemplateArgument::Integral) 281d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return Y; 282d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 283d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman // If we deduced two null pointers, make sure they have the same type. 284d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman if (Y.getKind() == TemplateArgument::NullPtr && 285d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman Context.hasSameType(X.getNullPtrType(), Y.getNullPtrType())) 2860d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return X; 287dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2880d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor // All other combinations are incompatible. 2890d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return DeducedTemplateArgument(); 290dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2910d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor case TemplateArgument::Pack: 2920d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Y.getKind() != TemplateArgument::Pack || 2930d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor X.pack_size() != Y.pack_size()) 2940d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return DeducedTemplateArgument(); 295dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 296dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi for (TemplateArgument::pack_iterator XA = X.pack_begin(), 2970d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor XAEnd = X.pack_end(), 2980d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor YA = Y.pack_begin(); 2990d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor XA != XAEnd; ++XA, ++YA) { 300dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (checkDeducedTemplateArguments(Context, 301dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi DeducedTemplateArgument(*XA, X.wasDeducedFromArrayBound()), 302135ffa7375fb5802b92f42774e02d0e6e4c78e5bDouglas Gregor DeducedTemplateArgument(*YA, Y.wasDeducedFromArrayBound())) 303135ffa7375fb5802b92f42774e02d0e6e4c78e5bDouglas Gregor .isNull()) 3040d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return DeducedTemplateArgument(); 3050d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor } 306dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3070d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor return X; 3080d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor } 309dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3103026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie llvm_unreachable("Invalid TemplateArgument Kind!"); 3110d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor} 3120d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor 3131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Deduce the value of the given non-type template parameter 314199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// from the given constant. 315f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 316a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceNonTypeTemplateArgument(Sema &S, 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump NonTypeTemplateParmDecl *NTTP, 3189d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor llvm::APSInt Value, QualType ValueType, 31902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor bool DeducedFromArrayBound, 3202a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 3215f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 3221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(NTTP->getDepth() == 0 && 323199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Cannot deduce non-type template argument with depth > 0"); 3241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 325855243789cb44799c03f4c7216d3d6308805f549Benjamin Kramer DeducedTemplateArgument NewDeduced(S.Context, Value, ValueType, 326855243789cb44799c03f4c7216d3d6308805f549Benjamin Kramer DeducedFromArrayBound); 327dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context, 3280d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[NTTP->getIndex()], 3290d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor NewDeduced); 3300d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Result.isNull()) { 331f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.Param = NTTP; 332f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Deduced[NTTP->getIndex()]; 3330d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.SecondArg = NewDeduced; 334dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Sema::TDK_Inconsistent; 335f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 336dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3370d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[NTTP->getIndex()] = Result; 338f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 339199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor} 340199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 3411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Deduce the value of the given non-type template parameter 342199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// from the given type- or value-dependent expression. 343199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// 344199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// \returns true if deduction succeeded, false otherwise. 345f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 346a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceNonTypeTemplateArgument(Sema &S, 347f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor NonTypeTemplateParmDecl *NTTP, 348f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Expr *Value, 3492a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 3505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(NTTP->getDepth() == 0 && 352199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Cannot deduce non-type template argument with depth > 0"); 353199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor assert((Value->isTypeDependent() || Value->isValueDependent()) && 354199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Expression template argument must be type- or value-dependent."); 3551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3560d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor DeducedTemplateArgument NewDeduced(Value); 357dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context, 358dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Deduced[NTTP->getIndex()], 3590d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor NewDeduced); 360dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3610d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Result.isNull()) { 3620d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.Param = NTTP; 3630d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.FirstArg = Deduced[NTTP->getIndex()]; 3640d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.SecondArg = NewDeduced; 365dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Sema::TDK_Inconsistent; 3669eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor } 367dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3680d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[NTTP->getIndex()] = Result; 369f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 370199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor} 371199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 37215755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// \brief Deduce the value of the given non-type template parameter 37315755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// from the given declaration. 37415755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// 37515755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// \returns true if deduction succeeded, false otherwise. 37615755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregorstatic Sema::TemplateDeductionResult 377a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceNonTypeTemplateArgument(Sema &S, 37815755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor NonTypeTemplateParmDecl *NTTP, 379d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman ValueDecl *D, 3802a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 3815f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 38215755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor assert(NTTP->getDepth() == 0 && 38315755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor "Cannot deduce non-type template argument with depth > 0"); 384dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 385d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman D = D ? cast<ValueDecl>(D->getCanonicalDecl()) : 0; 386d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman TemplateArgument New(D, NTTP->getType()->isReferenceType()); 387d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman DeducedTemplateArgument NewDeduced(New); 388dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context, 3890d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[NTTP->getIndex()], 3900d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor NewDeduced); 3910d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Result.isNull()) { 3920d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.Param = NTTP; 3930d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.FirstArg = Deduced[NTTP->getIndex()]; 3940d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.SecondArg = NewDeduced; 395dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Sema::TDK_Inconsistent; 39615755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor } 397dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3980d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[NTTP->getIndex()] = Result; 39915755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor return Sema::TDK_Success; 40015755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor} 40115755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 402f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 403a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 404db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor TemplateParameterList *TemplateParams, 405f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateName Param, 406f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateName Arg, 4072a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 4085f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 409d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor TemplateDecl *ParamDecl = Param.getAsTemplateDecl(); 410db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor if (!ParamDecl) { 411db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // The parameter type is dependent and is not a template template parameter, 412db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // so there is nothing that we can deduce. 413db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_Success; 414f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 415dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 416db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor if (TemplateTemplateParmDecl *TempParam 417db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor = dyn_cast<TemplateTemplateParmDecl>(ParamDecl)) { 4180d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor DeducedTemplateArgument NewDeduced(S.Context.getCanonicalTemplateName(Arg)); 419dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context, 4200d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[TempParam->getIndex()], 4210d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor NewDeduced); 4220d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Result.isNull()) { 4230d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.Param = TempParam; 4240d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.FirstArg = Deduced[TempParam->getIndex()]; 4250d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.SecondArg = NewDeduced; 426dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Sema::TDK_Inconsistent; 427db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor } 428dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4290d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[TempParam->getIndex()] = Result; 430dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Sema::TDK_Success; 431f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 432dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 433db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // Verify that the two template names are equivalent. 434a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (S.Context.hasSameTemplateName(Param, Arg)) 435db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_Success; 436dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 437db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // Mismatch of non-dependent template parameter to argument. 438db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Info.FirstArg = TemplateArgument(Param); 439db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Info.SecondArg = TemplateArgument(Arg); 440db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_NonDeducedMismatch; 441d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor} 442d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor 4431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Deduce the template arguments by comparing the template parameter 444de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// type (which is a template-id) with the template argument type. 445de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 446a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth/// \param S the Sema 447de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 448de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param TemplateParams the template parameters that we are deducing 449de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 450de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Param the parameter type 451de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 452de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Arg the argument type 453de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 454de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Info information about the template argument deduction itself 455de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 456de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Deduced the deduced template arguments 457de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 458de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \returns the result of template argument deduction so far. Note that a 459de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// "success" result means that template argument deduction has not yet failed, 460de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// but it may still fail, later, for other reasons. 461de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregorstatic Sema::TemplateDeductionResult 462a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 463de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor TemplateParameterList *TemplateParams, 464de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor const TemplateSpecializationType *Param, 465de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor QualType Arg, 4662a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 4675f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 468467b27b9a24bdc823218ad1ad0e37673b6cc1e83John McCall assert(Arg.isCanonical() && "Argument type must be canonical"); 4691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 470de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Check whether the template argument is a dependent template-id. 4711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const TemplateSpecializationType *SpecArg 472de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor = dyn_cast<TemplateSpecializationType>(Arg)) { 473de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Perform template argument deduction for the template name. 474de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (Sema::TemplateDeductionResult Result 475a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 476de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Param->getTemplateName(), 477de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor SpecArg->getTemplateName(), 478de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced)) 479de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 4801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 482de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Perform template argument deduction on each template 4830972c867e72171f24052d7b6d307020c065f8a66Douglas Gregor // argument. Ignore any missing/extra arguments, since they could be 4840972c867e72171f24052d7b6d307020c065f8a66Douglas Gregor // filled in by default arguments. 485dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeduceTemplateArguments(S, TemplateParams, 486dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Param->getArgs(), Param->getNumArgs(), 4870972c867e72171f24052d7b6d307020c065f8a66Douglas Gregor SpecArg->getArgs(), SpecArg->getNumArgs(), 488030a6644f253818b81b4d8a7fc1770c0a3d35474Richard Smith Info, Deduced); 489de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 4901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 491de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If the argument type is a class template specialization, we 492de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // perform template argument deduction using its template 493de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // arguments. 494de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor const RecordType *RecordArg = dyn_cast<RecordType>(Arg); 49529805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith if (!RecordArg) { 49629805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith Info.FirstArg = TemplateArgument(QualType(Param, 0)); 49729805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith Info.SecondArg = TemplateArgument(Arg); 498de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_NonDeducedMismatch; 49929805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith } 5001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ClassTemplateSpecializationDecl *SpecArg 502de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor = dyn_cast<ClassTemplateSpecializationDecl>(RecordArg->getDecl()); 50329805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith if (!SpecArg) { 50429805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith Info.FirstArg = TemplateArgument(QualType(Param, 0)); 50529805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith Info.SecondArg = TemplateArgument(Arg); 506de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_NonDeducedMismatch; 50729805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith } 5081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 509de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Perform template argument deduction for the template name. 510de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (Sema::TemplateDeductionResult Result 511a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, 512db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor TemplateParams, 513de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Param->getTemplateName(), 514de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor TemplateName(SpecArg->getSpecializedTemplate()), 515de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced)) 516de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 5171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor // Perform template argument deduction for the template arguments. 519dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeduceTemplateArguments(S, TemplateParams, 52020a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor Param->getArgs(), Param->getNumArgs(), 52120a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor SpecArg->getTemplateArgs().data(), 52220a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor SpecArg->getTemplateArgs().size(), 52320a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor Info, Deduced); 524de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor} 525de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor 526cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall/// \brief Determines whether the given type is an opaque type that 527cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall/// might be more qualified when instantiated. 528cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCallstatic bool IsPossiblyOpaquelyQualifiedType(QualType T) { 529cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall switch (T->getTypeClass()) { 530cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::TypeOfExpr: 531cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::TypeOf: 532cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::DependentName: 533cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::Decltype: 534cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::UnresolvedUsing: 53562c28c831bbf207cc36e683e7c321fc33bf8928cJohn McCall case Type::TemplateTypeParm: 536cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall return true; 537cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall 538cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::ConstantArray: 539cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::IncompleteArray: 540cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::VariableArray: 541cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall case Type::DependentSizedArray: 542cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall return IsPossiblyOpaquelyQualifiedType( 543cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall cast<ArrayType>(T)->getElementType()); 544cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall 545cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall default: 546cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall return false; 547cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall } 548cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall} 549cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall 550d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor/// \brief Retrieve the depth and index of a template parameter. 551dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumistatic std::pair<unsigned, unsigned> 552d3731198193eee92796ddeb493973b7a598b003eDouglas GregorgetDepthAndIndex(NamedDecl *ND) { 553603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(ND)) 554603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return std::make_pair(TTP->getDepth(), TTP->getIndex()); 555dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 556603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(ND)) 557603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return std::make_pair(NTTP->getDepth(), NTTP->getIndex()); 558dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 559603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(ND); 560603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return std::make_pair(TTP->getDepth(), TTP->getIndex()); 561603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor} 562603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor 563d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor/// \brief Retrieve the depth and index of an unexpanded parameter pack. 564dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumistatic std::pair<unsigned, unsigned> 565d3731198193eee92796ddeb493973b7a598b003eDouglas GregorgetDepthAndIndex(UnexpandedParameterPack UPP) { 566d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor if (const TemplateTypeParmType *TTP 567d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor = UPP.first.dyn_cast<const TemplateTypeParmType *>()) 568d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor return std::make_pair(TTP->getDepth(), TTP->getIndex()); 569dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 570d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor return getDepthAndIndex(UPP.first.get<NamedDecl *>()); 571d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor} 572d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor 573603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \brief Helper function to build a TemplateParameter when we don't 574603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// know its type statically. 575603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregorstatic TemplateParameter makeTemplateParameter(Decl *D) { 576603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(D)) 577603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return TemplateParameter(TTP); 578603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor else if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) 579603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return TemplateParameter(NTTP); 580dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 581603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return TemplateParameter(cast<TemplateTemplateParmDecl>(D)); 582603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor} 583603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor 5845429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor/// \brief Prepare to perform template argument deduction for all of the 5855429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor/// arguments in a set of argument packs. 586dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumistatic void PrepareArgumentPackDeduction(Sema &S, 5875f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced, 5884fe5be028b723fedc28bb33be96cde1ab2574ee6Bill Wendling ArrayRef<unsigned> PackIndices, 5895f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &SavedPacks, 5905f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl< 5915f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> > &NewlyDeducedPacks) { 5925429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor // Save the deduced template arguments for each parameter pack expanded 5935429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor // by this pack expansion, then clear out the deduction. 5945429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor for (unsigned I = 0, N = PackIndices.size(); I != N; ++I) { 5955429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor // Save the previously-deduced argument pack, then clear it out so that we 5965429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor // can deduce a new argument pack. 5975429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor SavedPacks[I] = Deduced[PackIndices[I]]; 598dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Deduced[PackIndices[I]] = TemplateArgument(); 599dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 600a8eaf008e92759142982f7b40720b2b2674bd663Richard Smith if (!S.CurrentInstantiationScope) 601a8eaf008e92759142982f7b40720b2b2674bd663Richard Smith continue; 602a8eaf008e92759142982f7b40720b2b2674bd663Richard Smith 6036964b3f80ce1ba489e7e25e7cd58062699af9b0cRichard Smith // If the template argument pack was explicitly specified, add that to 6045429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor // the set of deduced arguments. 6055429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor const TemplateArgument *ExplicitArgs; 6065429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor unsigned NumExplicitArgs; 607dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (NamedDecl *PartiallySubstitutedPack 6085429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor = S.CurrentInstantiationScope->getPartiallySubstitutedPack( 6095429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor &ExplicitArgs, 6105429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor &NumExplicitArgs)) { 6115429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor if (getDepthAndIndex(PartiallySubstitutedPack).second == PackIndices[I]) 612dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NewlyDeducedPacks[I].append(ExplicitArgs, 6135429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor ExplicitArgs + NumExplicitArgs); 6145429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor } 6155429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor } 6165429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor} 6175429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor 6180216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor/// \brief Finish template argument deduction for a set of argument packs, 6190216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor/// producing the argument packs and checking for consistency with prior 6200216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor/// deductions. 6210216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregorstatic Sema::TemplateDeductionResult 6220216f8121df32b320cab659d5b703fee50cdfda5Douglas GregorFinishArgumentPackDeduction(Sema &S, 6230216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor TemplateParameterList *TemplateParams, 6240216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor bool HasAnyArguments, 6255f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced, 626341785ec52f87c0803ba52dc88faac4e136f8593Bill Wendling ArrayRef<unsigned> PackIndices, 6275f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &SavedPacks, 6285f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl< 6295f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> > &NewlyDeducedPacks, 6300216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor TemplateDeductionInfo &Info) { 6310216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor // Build argument packs for each of the parameter packs expanded by this 6320216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor // pack expansion. 6330216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor for (unsigned I = 0, N = PackIndices.size(); I != N; ++I) { 6340216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor if (HasAnyArguments && NewlyDeducedPacks[I].empty()) { 6350216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor // We were not able to deduce anything for this parameter pack, 6360216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor // so just restore the saved argument pack. 6370216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Deduced[PackIndices[I]] = SavedPacks[I]; 6380216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor continue; 6390216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor } 640dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 6410216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor DeducedTemplateArgument NewPack; 642dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 6430216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor if (NewlyDeducedPacks[I].empty()) { 6440216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor // If we deduced an empty argument pack, create it now. 645d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman NewPack = DeducedTemplateArgument(TemplateArgument::getEmptyPack()); 6460216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor } else { 6470216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor TemplateArgument *ArgumentPack 648203e6a322ae29d577acafcb1572a57ec16e1e730Douglas Gregor = new (S.Context) TemplateArgument [NewlyDeducedPacks[I].size()]; 6490216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor std::copy(NewlyDeducedPacks[I].begin(), NewlyDeducedPacks[I].end(), 6500216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor ArgumentPack); 6510216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor NewPack 652203e6a322ae29d577acafcb1572a57ec16e1e730Douglas Gregor = DeducedTemplateArgument(TemplateArgument(ArgumentPack, 653203e6a322ae29d577acafcb1572a57ec16e1e730Douglas Gregor NewlyDeducedPacks[I].size()), 654dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NewlyDeducedPacks[I][0].wasDeducedFromArrayBound()); 6550216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor } 656dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 6570216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor DeducedTemplateArgument Result 6580216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor = checkDeducedTemplateArguments(S.Context, SavedPacks[I], NewPack); 6590216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor if (Result.isNull()) { 6600216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Info.Param 6610216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor = makeTemplateParameter(TemplateParams->getParam(PackIndices[I])); 6620216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Info.FirstArg = SavedPacks[I]; 6630216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Info.SecondArg = NewPack; 6640216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor return Sema::TDK_Inconsistent; 6650216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor } 666dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 6670216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Deduced[PackIndices[I]] = Result; 6680216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor } 669dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 6700216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor return Sema::TDK_Success; 6710216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor} 6720216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor 673603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \brief Deduce the template arguments by comparing the list of parameter 674dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// types to the list of argument types, as in the parameter-type-lists of 675dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// function types (C++ [temp.deduct.type]p10). 676603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 677603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param S The semantic analysis object within which we are deducing 678603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 679603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param TemplateParams The template parameters that we are deducing 680603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 681603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param Params The list of parameter types 682603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 683603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param NumParams The number of types in \c Params 684603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 685603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param Args The list of argument types 686603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 687603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param NumArgs The number of types in \c Args 688603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 689603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param Info information about the template argument deduction itself 690603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 691603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param Deduced the deduced template arguments 692603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 693603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \param TDF bitwise OR of the TemplateDeductionFlags bits that describe 694603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// how template argument deduction is performed. 695603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// 6965c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// \param PartialOrdering If true, we are performing template argument 697dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// deduction for during partial ordering for a call 6985c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// (C++0x [temp.deduct.partial]). 6995c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// 700b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor/// \param RefParamComparisons If we're performing template argument deduction 7015c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// in the context of partial ordering, the set of qualifier comparisons. 7025c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// 703603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// \returns the result of template argument deduction so far. Note that a 704603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// "success" result means that template argument deduction has not yet failed, 705603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor/// but it may still fail, later, for other reasons. 706603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregorstatic Sema::TemplateDeductionResult 707603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas GregorDeduceTemplateArguments(Sema &S, 708603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor TemplateParameterList *TemplateParams, 709603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor const QualType *Params, unsigned NumParams, 710603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor const QualType *Args, unsigned NumArgs, 711603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor TemplateDeductionInfo &Info, 7125f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced, 7135c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor unsigned TDF, 7145c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor bool PartialOrdering = false, 7155f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<RefParamPartialOrderingComparison> * 716b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor RefParamComparisons = 0) { 7170bbacf8d2b3c7a5f19f292f3201e371836445502Douglas Gregor // Fast-path check to see if we have too many/too few arguments. 7180bbacf8d2b3c7a5f19f292f3201e371836445502Douglas Gregor if (NumParams != NumArgs && 7190bbacf8d2b3c7a5f19f292f3201e371836445502Douglas Gregor !(NumParams && isa<PackExpansionType>(Params[NumParams - 1])) && 7200bbacf8d2b3c7a5f19f292f3201e371836445502Douglas Gregor !(NumArgs && isa<PackExpansionType>(Args[NumArgs - 1]))) 72129805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith return Sema::TDK_MiscellaneousDeductionFailure; 722dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 723603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // C++0x [temp.deduct.type]p10: 724dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // Similarly, if P has a form that contains (T), then each parameter type 725dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // Pi of the respective parameter-type- list of P is compared with the 726dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // corresponding parameter type Ai of the corresponding parameter-type-list 727dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // of A. [...] 728603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor unsigned ArgIdx = 0, ParamIdx = 0; 729603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor for (; ParamIdx != NumParams; ++ParamIdx) { 730603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Check argument types. 731dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi const PackExpansionType *Expansion 732603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor = dyn_cast<PackExpansionType>(Params[ParamIdx]); 733603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (!Expansion) { 734603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Simple case: compare the parameter and argument types at this point. 735dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 736603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Make sure we have an argument. 737603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (ArgIdx >= NumArgs) 73829805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith return Sema::TDK_MiscellaneousDeductionFailure; 739dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 74077d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor if (isa<PackExpansionType>(Args[ArgIdx])) { 74177d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // C++0x [temp.deduct.type]p22: 74277d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // If the original function parameter associated with A is a function 74377d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // parameter pack and the function parameter associated with P is not 74477d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // a function parameter pack, then template argument deduction fails. 74529805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith return Sema::TDK_MiscellaneousDeductionFailure; 74677d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor } 747dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 748603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (Sema::TemplateDeductionResult Result 749bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 750bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Params[ParamIdx], Args[ArgIdx], 751bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF, 752bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl PartialOrdering, 753bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl RefParamComparisons)) 754603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return Result; 755dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 756603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor ++ArgIdx; 757603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor continue; 758603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 759dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 7607d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor // C++0x [temp.deduct.type]p5: 7617d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor // The non-deduced contexts are: 762dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // - A function parameter pack that does not occur at the end of the 7637d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor // parameter-declaration-clause. 7647d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor if (ParamIdx + 1 < NumParams) 7657d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor return Sema::TDK_Success; 7667d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor 767603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // C++0x [temp.deduct.type]p10: 768dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If the parameter-declaration corresponding to Pi is a function 769603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // parameter pack, then the type of its declarator- id is compared with 770dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // each remaining parameter type in the parameter-type-list of A. Each 771603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // comparison deduces template arguments for subsequent positions in the 772603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // template parameter packs expanded by the function parameter pack. 773dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 774603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Compute the set of template parameter indices that correspond to 775603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // parameter packs expanded by the pack expansion. 7765f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<unsigned, 2> PackIndices; 777603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor QualType Pattern = Expansion->getPattern(); 778603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor { 779013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector SawIndices(TemplateParams->size()); 7805f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<UnexpandedParameterPack, 2> Unexpanded; 781603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor S.collectUnexpandedParameterPacks(Pattern, Unexpanded); 782603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor for (unsigned I = 0, N = Unexpanded.size(); I != N; ++I) { 783603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor unsigned Depth, Index; 784603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor llvm::tie(Depth, Index) = getDepthAndIndex(Unexpanded[I]); 785603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (Depth == 0 && !SawIndices[Index]) { 786603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor SawIndices[Index] = true; 787603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor PackIndices.push_back(Index); 788603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 789603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 790603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 791603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor assert(!PackIndices.empty() && "Pack expansion without unexpanded packs?"); 792603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor 793d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // Keep track of the deduced template arguments for each parameter pack 794dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // expanded by this pack expansion (the outer index) and for each 795d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // template argument (the inner SmallVectors). 7965f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<SmallVector<DeducedTemplateArgument, 4>, 2> 797d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor NewlyDeducedPacks(PackIndices.size()); 7985f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 2> 7995429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor SavedPacks(PackIndices.size()); 800dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi PrepareArgumentPackDeduction(S, Deduced, PackIndices, SavedPacks, 8015429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor NewlyDeducedPacks); 802dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 803603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor bool HasAnyArguments = false; 804603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor for (; ArgIdx < NumArgs; ++ArgIdx) { 805603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor HasAnyArguments = true; 806dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 807603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Deduce template arguments from the pattern. 808dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (Sema::TemplateDeductionResult Result 809bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, Pattern, 810bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Args[ArgIdx], Info, Deduced, 811bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl TDF, PartialOrdering, 812bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl RefParamComparisons)) 813603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return Result; 814dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 815603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Capture the deduced template arguments for each parameter pack expanded 816603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // by this pack expansion, add them to the list of arguments we've deduced 817603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // for that pack, then clear out the deduced argument. 818603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor for (unsigned I = 0, N = PackIndices.size(); I != N; ++I) { 819603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor DeducedTemplateArgument &DeducedArg = Deduced[PackIndices[I]]; 820603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (!DeducedArg.isNull()) { 821603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor NewlyDeducedPacks[I].push_back(DeducedArg); 822603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor DeducedArg = DeducedTemplateArgument(); 823603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 824603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 825603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 826dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 827603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Build argument packs for each of the parameter packs expanded by this 828603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // pack expansion. 8290216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor if (Sema::TemplateDeductionResult Result 830dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = FinishArgumentPackDeduction(S, TemplateParams, HasAnyArguments, 8310216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Deduced, PackIndices, SavedPacks, 8320216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor NewlyDeducedPacks, Info)) 833dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Result; 834603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor } 835dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 836603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor // Make sure we don't have any extra arguments. 837603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor if (ArgIdx < NumArgs) 83829805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith return Sema::TDK_MiscellaneousDeductionFailure; 839dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 840603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return Sema::TDK_Success; 841603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor} 842603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor 84361d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor/// \brief Determine whether the parameter has qualifiers that are either 84461d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor/// inconsistent with or a superset of the argument's qualifiers. 84561d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregorstatic bool hasInconsistentOrSupersetQualifiersOf(QualType ParamType, 84661d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor QualType ArgType) { 84761d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor Qualifiers ParamQs = ParamType.getQualifiers(); 84861d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor Qualifiers ArgQs = ArgType.getQualifiers(); 84961d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor 85061d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor if (ParamQs == ArgQs) 85161d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor return false; 85261d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor 85361d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor // Mismatched (but not missing) Objective-C GC attributes. 85461d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor if (ParamQs.getObjCGCAttr() != ArgQs.getObjCGCAttr() && 85561d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor ParamQs.hasObjCGCAttr()) 85661d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor return true; 85761d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor 85861d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor // Mismatched (but not missing) address spaces. 85961d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor if (ParamQs.getAddressSpace() != ArgQs.getAddressSpace() && 86061d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor ParamQs.hasAddressSpace()) 86161d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor return true; 86261d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor 863f85e193739c953358c865005855253af4f68a497John McCall // Mismatched (but not missing) Objective-C lifetime qualifiers. 864f85e193739c953358c865005855253af4f68a497John McCall if (ParamQs.getObjCLifetime() != ArgQs.getObjCLifetime() && 865f85e193739c953358c865005855253af4f68a497John McCall ParamQs.hasObjCLifetime()) 866f85e193739c953358c865005855253af4f68a497John McCall return true; 867f85e193739c953358c865005855253af4f68a497John McCall 86861d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor // CVR qualifier superset. 86961d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor return (ParamQs.getCVRQualifiers() != ArgQs.getCVRQualifiers()) && 87061d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor ((ParamQs.getCVRQualifiers() | ArgQs.getCVRQualifiers()) 87161d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor == ParamQs.getCVRQualifiers()); 87261d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor} 87361d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor 874092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor/// \brief Compare types for equality with respect to possibly compatible 875092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor/// function types (noreturn adjustment, implicit calling conventions). If any 876092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor/// of parameter and argument is not a function, just perform type comparison. 877092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor/// 878092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor/// \param Param the template parameter type. 879092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor/// 880092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor/// \param Arg the argument type. 881092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregorbool Sema::isSameOrCompatibleFunctionType(CanQualType Param, 882092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor CanQualType Arg) { 883092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor const FunctionType *ParamFunction = Param->getAs<FunctionType>(), 884092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor *ArgFunction = Arg->getAs<FunctionType>(); 885092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor 886092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor // Just compare if not functions. 887092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (!ParamFunction || !ArgFunction) 888092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor return Param == Arg; 889092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor 890092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor // Noreturn adjustment. 891092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor QualType AdjustedParam; 892092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (IsNoReturnConversion(Param, Arg, AdjustedParam)) 893092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor return Arg == Context.getCanonicalType(AdjustedParam); 894092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor 895092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor // FIXME: Compatible calling conventions. 896092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor 897092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor return Param == Arg; 898092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor} 899092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor 900500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \brief Deduce the template arguments by comparing the parameter type and 901500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// the argument type (C++ [temp.deduct.type]). 902500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 903a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth/// \param S the semantic analysis object within which we are deducing 904500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 905500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param TemplateParams the template parameters that we are deducing 906500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 907500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param ParamIn the parameter type 908500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 909500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param ArgIn the argument type 910500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 911500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param Info information about the template argument deduction itself 912500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 913500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param Deduced the deduced template arguments 914500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 915508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor/// \param TDF bitwise OR of the TemplateDeductionFlags bits that describe 9161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// how template argument deduction is performed. 917500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 9185c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// \param PartialOrdering Whether we're performing template argument deduction 9195c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// in the context of partial ordering (C++0x [temp.deduct.partial]). 9205c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// 921b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor/// \param RefParamComparisons If we're performing template argument deduction 9225c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// in the context of partial ordering, the set of qualifier comparisons. 9235c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// 924500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \returns the result of template argument deduction so far. Note that a 925500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// "success" result means that template argument deduction has not yet failed, 926500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// but it may still fail, later, for other reasons. 927f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 928bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian RedlDeduceTemplateArgumentsByTypeMatch(Sema &S, 929bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl TemplateParameterList *TemplateParams, 930bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl QualType ParamIn, QualType ArgIn, 931bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl TemplateDeductionInfo &Info, 932bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl SmallVectorImpl<DeducedTemplateArgument> &Deduced, 933bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl unsigned TDF, 934bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl bool PartialOrdering, 935bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl SmallVectorImpl<RefParamPartialOrderingComparison> * 936bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl RefParamComparisons) { 9370b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // We only want to look at the canonical types, since typedefs and 9380b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // sugar are not part of template argument deduction. 939a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth QualType Param = S.Context.getCanonicalType(ParamIn); 940a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth QualType Arg = S.Context.getCanonicalType(ArgIn); 9410b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 94277d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // If the argument type is a pack expansion, look at its pattern. 943dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // This isn't explicitly called out 94477d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor if (const PackExpansionType *ArgExpansion 94577d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor = dyn_cast<PackExpansionType>(Arg)) 94677d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor Arg = ArgExpansion->getPattern(); 947dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9485c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor if (PartialOrdering) { 9495c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // C++0x [temp.deduct.partial]p5: 950dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // Before the partial ordering is done, certain transformations are 951dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // performed on the types used for partial ordering: 952dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // - If P is a reference type, P is replaced by the type referred to. 9535c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor const ReferenceType *ParamRef = Param->getAs<ReferenceType>(); 9545c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor if (ParamRef) 9555c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Param = ParamRef->getPointeeType(); 956dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9575c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // - If A is a reference type, A is replaced by the type referred to. 9585c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor const ReferenceType *ArgRef = Arg->getAs<ReferenceType>(); 9595c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor if (ArgRef) 9605c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Arg = ArgRef->getPointeeType(); 961dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 962b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor if (RefParamComparisons && ParamRef && ArgRef) { 9635c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // C++0x [temp.deduct.partial]p6: 964dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If both P and A were reference types (before being replaced with the 965dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // type referred to above), determine which of the two types (if any) is 9665c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // more cv-qualified than the other; otherwise the types are considered 967dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // to be equally cv-qualified for partial ordering purposes. The result 9685c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // of this determination will be used below. 9695c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // 970dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // We save this information for later, using it only when deduction 9715c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // succeeds in both directions. 972b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor RefParamPartialOrderingComparison Comparison; 973b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Comparison.ParamIsRvalueRef = ParamRef->getAs<RValueReferenceType>(); 974b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Comparison.ArgIsRvalueRef = ArgRef->getAs<RValueReferenceType>(); 975b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Comparison.Qualifiers = NeitherMoreQualified; 976769d0cc72b1831785596d0e76f327bdb887823beDouglas Gregor 977769d0cc72b1831785596d0e76f327bdb887823beDouglas Gregor Qualifiers ParamQuals = Param.getQualifiers(); 978769d0cc72b1831785596d0e76f327bdb887823beDouglas Gregor Qualifiers ArgQuals = Arg.getQualifiers(); 979769d0cc72b1831785596d0e76f327bdb887823beDouglas Gregor if (ParamQuals.isStrictSupersetOf(ArgQuals)) 980b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Comparison.Qualifiers = ParamMoreQualified; 981769d0cc72b1831785596d0e76f327bdb887823beDouglas Gregor else if (ArgQuals.isStrictSupersetOf(ParamQuals)) 982b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Comparison.Qualifiers = ArgMoreQualified; 983b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor RefParamComparisons->push_back(Comparison); 9845c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor } 985dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 9865c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // C++0x [temp.deduct.partial]p7: 9875c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // Remove any top-level cv-qualifiers: 988dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // - If P is a cv-qualified type, P is replaced by the cv-unqualified 9895c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // version of P. 9905c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Param = Param.getUnqualifiedType(); 991dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // - If A is a cv-qualified type, A is replaced by the cv-unqualified 9925c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // version of A. 9935c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Arg = Arg.getUnqualifiedType(); 9945c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor } else { 9955c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // C++0x [temp.deduct.call]p4 bullet 1: 9965c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // - If the original P is a reference type, the deduced A (i.e., the type 9975c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // referred to by the reference) can be more cv-qualified than the 9985c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // transformed A. 9995c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor if (TDF & TDF_ParamWithReferenceType) { 10005c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Qualifiers Quals; 10015c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor QualType UnqualParam = S.Context.getUnqualifiedArrayType(Param, Quals); 10025c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Quals.setCVRQualifiers(Quals.getCVRQualifiers() & 100362c28c831bbf207cc36e683e7c321fc33bf8928cJohn McCall Arg.getCVRQualifiers()); 10045c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Param = S.Context.getQualifiedType(UnqualParam, Quals); 10055c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor } 1006dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 100773b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor if ((TDF & TDF_TopLevelParameterTypeList) && !Param->isFunctionType()) { 100873b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor // C++0x [temp.deduct.type]p10: 100973b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor // If P and A are function types that originated from deduction when 101073b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor // taking the address of a function template (14.8.2.2) or when deducing 101173b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor // template arguments from a function declaration (14.8.2.6) and Pi and 1012dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // Ai are parameters of the top-level parameter-type-list of P and A, 1013dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // respectively, Pi is adjusted if it is an rvalue reference to a 1014dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // cv-unqualified template parameter and Ai is an lvalue reference, in 1015dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // which case the type of Pi is changed to be the template parameter 101673b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor // type (i.e., T&& is changed to simply T). [ Note: As a result, when 101773b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor // Pi is T&& and Ai is X&, the adjusted Pi will be T, causing T to be 10180099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // deduced as X&. - end note ] 101973b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor TDF &= ~TDF_TopLevelParameterTypeList; 1020dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 102173b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor if (const RValueReferenceType *ParamRef 102273b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor = Param->getAs<RValueReferenceType>()) { 102373b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor if (isa<TemplateTypeParmType>(ParamRef->getPointeeType()) && 102473b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor !ParamRef->getPointeeType().getQualifiers()) 102573b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor if (Arg->isLValueReferenceType()) 102673b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor Param = ParamRef->getPointeeType(); 102773b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor } 102873b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor } 1029500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor } 1030dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1031199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // C++ [temp.deduct.type]p9: 10321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // A template type argument T, a template template argument TT or a 10331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // template non-type argument i can be deduced if P and A have one of 1034199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // the following forms: 1035199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // 1036199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T 1037199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // cv-list T 10381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const TemplateTypeParmType *TemplateTypeParm 1039183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall = Param->getAs<TemplateTypeParmType>()) { 1040af130823cbac5c02f7fe57a5733ee511f5a3ac98Douglas Gregor // Just skip any attempts to deduce from a placeholder type. 1041af130823cbac5c02f7fe57a5733ee511f5a3ac98Douglas Gregor if (Arg->isPlaceholderType()) 1042af130823cbac5c02f7fe57a5733ee511f5a3ac98Douglas Gregor return Sema::TDK_Success; 1043af130823cbac5c02f7fe57a5733ee511f5a3ac98Douglas Gregor 1044f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor unsigned Index = TemplateTypeParm->getIndex(); 1045f290e0db835a619014538c41ed552696efc0e977Douglas Gregor bool RecanonicalizeArg = false; 10461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10479e9fae4b8af47c15696da4ea3c30102e3a035179Douglas Gregor // If the argument type is an array type, move the qualifiers up to the 10489e9fae4b8af47c15696da4ea3c30102e3a035179Douglas Gregor // top level, so they can be matched with the qualifiers on the parameter. 1049f290e0db835a619014538c41ed552696efc0e977Douglas Gregor if (isa<ArrayType>(Arg)) { 10500953e767ff7817f97b3ab20896b229891eeff45bJohn McCall Qualifiers Quals; 1051a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth Arg = S.Context.getUnqualifiedArrayType(Arg, Quals); 10520953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (Quals) { 1053a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth Arg = S.Context.getQualifiedType(Arg, Quals); 1054f290e0db835a619014538c41ed552696efc0e977Douglas Gregor RecanonicalizeArg = true; 1055f290e0db835a619014538c41ed552696efc0e977Douglas Gregor } 1056f290e0db835a619014538c41ed552696efc0e977Douglas Gregor } 10571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10580b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // The argument type can not be less qualified than the parameter 10590b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // type. 106061d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor if (!(TDF & TDF_IgnoreQualifiers) && 106161d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor hasInconsistentOrSupersetQualifiersOf(Param, Arg)) { 1062f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); 106357e97786433e70197a089360228d8f0d82e3ad4cJohn McCall Info.FirstArg = TemplateArgument(Param); 1064833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.SecondArg = TemplateArgument(Arg); 106557e97786433e70197a089360228d8f0d82e3ad4cJohn McCall return Sema::TDK_Underqualified; 1066f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 10670b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 10680b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor assert(TemplateTypeParm->getDepth() == 0 && "Can't deduce with depth > 0"); 1069a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth assert(Arg != S.Context.OverloadTy && "Unresolved overloaded function"); 10700953e767ff7817f97b3ab20896b229891eeff45bJohn McCall QualType DeducedType = Arg; 107149f4e1cbd839da27ff4814b4ea6d85a79f786cbdJohn McCall 107261d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor // Remove any qualifiers on the parameter from the deduced type. 107361d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor // We checked the qualifiers for consistency above. 107461d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor Qualifiers DeducedQs = DeducedType.getQualifiers(); 107561d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor Qualifiers ParamQs = Param.getQualifiers(); 107661d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor DeducedQs.removeCVRQualifiers(ParamQs.getCVRQualifiers()); 107761d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor if (ParamQs.hasObjCGCAttr()) 107861d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor DeducedQs.removeObjCGCAttr(); 107961d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor if (ParamQs.hasAddressSpace()) 108061d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor DeducedQs.removeAddressSpace(); 1081f85e193739c953358c865005855253af4f68a497John McCall if (ParamQs.hasObjCLifetime()) 1082f85e193739c953358c865005855253af4f68a497John McCall DeducedQs.removeObjCLifetime(); 1083e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor 1084e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor // Objective-C ARC: 1085da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor // If template deduction would produce a lifetime qualifier on a type 1086da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor // that is not a lifetime type, template argument deduction fails. 1087da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor if (ParamQs.hasObjCLifetime() && !DeducedType->isObjCLifetimeType() && 1088da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor !DeducedType->isDependentType()) { 1089da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); 1090da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor Info.FirstArg = TemplateArgument(Param); 1091da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor Info.SecondArg = TemplateArgument(Arg); 1092da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor return Sema::TDK_Underqualified; 1093da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor } 1094da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor 1095da8b24961acfbeff47f585109b7559ba60e574cbDouglas Gregor // Objective-C ARC: 1096e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor // If template deduction would produce an argument type with lifetime type 1097e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor // but no lifetime qualifier, the __strong lifetime qualifier is inferred. 10984e4d08403ca5cfd4d558fa2936215d3a4e5a528dDavid Blaikie if (S.getLangOpts().ObjCAutoRefCount && 1099e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor DeducedType->isObjCLifetimeType() && 1100e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor !DeducedQs.hasObjCLifetime()) 1101e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor DeducedQs.setObjCLifetime(Qualifiers::OCL_Strong); 1102e559ca1672ecef59345a928af0a6809b09282d2cDouglas Gregor 110361d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor DeducedType = S.Context.getQualifiedType(DeducedType.getUnqualifiedType(), 110461d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor DeducedQs); 110561d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor 1106f290e0db835a619014538c41ed552696efc0e977Douglas Gregor if (RecanonicalizeArg) 1107a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth DeducedType = S.Context.getCanonicalType(DeducedType); 11081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11090d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor DeducedTemplateArgument NewDeduced(DeducedType); 1110dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi DeducedTemplateArgument Result = checkDeducedTemplateArguments(S.Context, 11110d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[Index], 11120d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor NewDeduced); 11130d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor if (Result.isNull()) { 11140d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); 11150d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.FirstArg = Deduced[Index]; 11160d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Info.SecondArg = NewDeduced; 1117dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Sema::TDK_Inconsistent; 11180b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 1119dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 11200d80abc3b7fb0dca26fb6b272d2c3484f86fb7e7Douglas Gregor Deduced[Index] = Result; 1121dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Sema::TDK_Success; 11220b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 11230b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 1124f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor // Set up the template argument deduction information for a failure. 1125833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.FirstArg = TemplateArgument(ParamIn); 1126833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.SecondArg = TemplateArgument(ArgIn); 1127f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 11280bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor // If the parameter is an already-substituted template parameter 11290bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor // pack, do nothing: we don't know which of its arguments to look 11300bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor // at, so we have to wait until all of the parameter packs in this 11310bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor // expansion have arguments. 11320bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor if (isa<SubstTemplateTypeParmPackType>(Param)) 11330bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor return Sema::TDK_Success; 11340bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor 1135508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor // Check the cv-qualifiers on the parameter and argument types. 1136092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor CanQualType CanParam = S.Context.getCanonicalType(Param); 1137092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor CanQualType CanArg = S.Context.getCanonicalType(Arg); 1138508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (!(TDF & TDF_IgnoreQualifiers)) { 1139508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (TDF & TDF_ParamWithReferenceType) { 114061d0b6baf47cf411f6c0f6ddb4acffcfeec724f1Douglas Gregor if (hasInconsistentOrSupersetQualifiersOf(Param, Arg)) 1141508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1142cd05e81e2e2640a0a0097658c660afc6c8a9f4fdJohn McCall } else if (!IsPossiblyOpaquelyQualifiedType(Param)) { 1143508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (Param.getCVRQualifiers() != Arg.getCVRQualifiers()) 11441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Sema::TDK_NonDeducedMismatch; 1145508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor } 1146fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor 1147fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor // If the parameter type is not dependent, there is nothing to deduce. 1148fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor if (!Param->isDependentType()) { 1149092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (!(TDF & TDF_SkipNonDependent)) { 1150092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor bool NonDeduced = (TDF & TDF_InOverloadResolution)? 1151092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor !S.isSameOrCompatibleFunctionType(CanParam, CanArg) : 1152092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor Param != Arg; 1153092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (NonDeduced) { 1154092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1155092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor } 1156092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor } 1157fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor return Sema::TDK_Success; 1158fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor } 1159092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor } else if (!Param->isDependentType()) { 1160092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor CanQualType ParamUnqualType = CanParam.getUnqualifiedType(), 1161092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor ArgUnqualType = CanArg.getUnqualifiedType(); 1162092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor bool Success = (TDF & TDF_InOverloadResolution)? 1163092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor S.isSameOrCompatibleFunctionType(ParamUnqualType, 1164092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor ArgUnqualType) : 1165092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor ParamUnqualType == ArgUnqualType; 1166092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (Success) 1167092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor return Sema::TDK_Success; 1168508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor } 11690b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 1170d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor switch (Param->getTypeClass()) { 11714ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Non-canonical types cannot appear here. 11724ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor#define NON_CANONICAL_TYPE(Class, Base) \ 11734ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::Class: llvm_unreachable("deducing non-canonical type: " #Class); 11744ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor#define TYPE(Class, Base) 11754ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor#include "clang/AST/TypeNodes.def" 11764ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 11774ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::TemplateTypeParm: 11784ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::SubstTemplateTypeParmPack: 11794ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor llvm_unreachable("Type nodes handled above"); 1180fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor 1181fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor // These types cannot be dependent, so simply check whether the types are 1182fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor // the same. 1183199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case Type::Builtin: 11844ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::VariableArray: 11854ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::Vector: 11864ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::FunctionNoProto: 11874ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::Record: 11884ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::Enum: 11894ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::ObjCObject: 11904ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::ObjCInterface: 1191fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor case Type::ObjCObjectPointer: { 1192fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor if (TDF & TDF_SkipNonDependent) 1193fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor return Sema::TDK_Success; 1194fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor 1195fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor if (TDF & TDF_IgnoreQualifiers) { 1196fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor Param = Param.getUnqualifiedType(); 1197fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor Arg = Arg.getUnqualifiedType(); 1198fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor } 1199fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor 1200fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor return Param == Arg? Sema::TDK_Success : Sema::TDK_NonDeducedMismatch; 1201fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor } 1202fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor 12034ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // _Complex T [placeholder extension] 12044ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::Complex: 12054ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (const ComplexType *ComplexArg = Arg->getAs<ComplexType>()) 1206bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 12074ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor cast<ComplexType>(Param)->getElementType(), 1208bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ComplexArg->getElementType(), 1209bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF); 12104ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 12114ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Sema::TDK_NonDeducedMismatch; 1212b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman 1213b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman // _Atomic T [extension] 1214b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman case Type::Atomic: 1215b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman if (const AtomicType *AtomicArg = Arg->getAs<AtomicType>()) 1216bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1217b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman cast<AtomicType>(Param)->getValueType(), 1218b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman AtomicArg->getValueType(), 1219b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman Info, Deduced, TDF); 1220b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman 1221b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman return Sema::TDK_NonDeducedMismatch; 1222b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman 1223199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T * 1224d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor case Type::Pointer: { 1225c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall QualType PointeeType; 1226c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall if (const PointerType *PointerArg = Arg->getAs<PointerType>()) { 1227c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall PointeeType = PointerArg->getPointeeType(); 1228c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall } else if (const ObjCObjectPointerType *PointerArg 1229c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall = Arg->getAs<ObjCObjectPointerType>()) { 1230c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall PointeeType = PointerArg->getPointeeType(); 1231c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall } else { 1232f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1233c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall } 12341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12354112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor unsigned SubTDF = TDF & (TDF_IgnoreQualifiers | TDF_DerivedClass); 1236bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1237bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl cast<PointerType>(Param)->getPointeeType(), 1238c0008349f233e70e3ffabe7b31eab5d9859bc25fJohn McCall PointeeType, 12394112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor Info, Deduced, SubTDF); 1240d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor } 12411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1242199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T & 1243d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor case Type::LValueReference: { 12446217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const LValueReferenceType *ReferenceArg = Arg->getAs<LValueReferenceType>(); 1245d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor if (!ReferenceArg) 1246f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 12471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1248bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1249d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor cast<LValueReferenceType>(Param)->getPointeeType(), 1250bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ReferenceArg->getPointeeType(), Info, Deduced, 0); 1251d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor } 12520b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 1253199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T && [C++0x] 1254d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor case Type::RValueReference: { 12556217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const RValueReferenceType *ReferenceArg = Arg->getAs<RValueReferenceType>(); 1256d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor if (!ReferenceArg) 1257f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 12581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1259bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1260bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl cast<RValueReferenceType>(Param)->getPointeeType(), 1261bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ReferenceArg->getPointeeType(), 1262bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, 0); 1263d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor } 12641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1265199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T [] (implied, but not stated explicitly) 12664d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson case Type::IncompleteArray: { 12671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const IncompleteArrayType *IncompleteArrayArg = 1268a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth S.Context.getAsIncompleteArrayType(Arg); 12694d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson if (!IncompleteArrayArg) 1270f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 12711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1272e4f26e54d81fb1987333132fe34cd927e62c803cJohn McCall unsigned SubTDF = TDF & TDF_IgnoreQualifiers; 1273bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1274bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl S.Context.getAsIncompleteArrayType(Param)->getElementType(), 1275bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl IncompleteArrayArg->getElementType(), 1276bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, SubTDF); 12774d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson } 1278199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 1279199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T [integer-constant] 12804d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson case Type::ConstantArray: { 12811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ConstantArrayType *ConstantArrayArg = 1282a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth S.Context.getAsConstantArrayType(Arg); 12834d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson if (!ConstantArrayArg) 1284f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 12851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ConstantArrayType *ConstantArrayParm = 1287a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth S.Context.getAsConstantArrayType(Param); 12884d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson if (ConstantArrayArg->getSize() != ConstantArrayParm->getSize()) 1289f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 12901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1291e4f26e54d81fb1987333132fe34cd927e62c803cJohn McCall unsigned SubTDF = TDF & TDF_IgnoreQualifiers; 1292bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1293bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ConstantArrayParm->getElementType(), 1294bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ConstantArrayArg->getElementType(), 1295bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, SubTDF); 12964d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson } 12974d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson 1298199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // type [i] 1299199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case Type::DependentSizedArray: { 1300a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth const ArrayType *ArrayArg = S.Context.getAsArrayType(Arg); 1301199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (!ArrayArg) 1302f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 13031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1304e4f26e54d81fb1987333132fe34cd927e62c803cJohn McCall unsigned SubTDF = TDF & TDF_IgnoreQualifiers; 1305e4f26e54d81fb1987333132fe34cd927e62c803cJohn McCall 1306199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Check the element type of the arrays 1307199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor const DependentSizedArrayType *DependentArrayParm 1308a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = S.Context.getAsDependentSizedArrayType(Param); 1309f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 1310bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1311bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl DependentArrayParm->getElementType(), 1312bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ArrayArg->getElementType(), 1313bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, SubTDF)) 1314f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 13151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1316199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Determine the array bound is something we can deduce. 13171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump NonTypeTemplateParmDecl *NTTP 1318199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor = getDeducedParameterFromExpr(DependentArrayParm->getSizeExpr()); 1319199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (!NTTP) 1320f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 13211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // We can perform template argument deduction for the given non-type 1323199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // template parameter. 13241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(NTTP->getDepth() == 0 && 1325199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Cannot deduce non-type template argument at depth > 0"); 13261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const ConstantArrayType *ConstantArrayArg 1327335e24a194f2000086d298b800d6169ebc5a7ee6Anders Carlsson = dyn_cast<ConstantArrayType>(ArrayArg)) { 1328335e24a194f2000086d298b800d6169ebc5a7ee6Anders Carlsson llvm::APSInt Size(ConstantArrayArg->getSize()); 1329dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeduceNonTypeTemplateArgument(S, NTTP, Size, 13309d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor S.Context.getSizeType(), 133102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor /*ArrayBound=*/true, 1332f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced); 1333335e24a194f2000086d298b800d6169ebc5a7ee6Anders Carlsson } 1334199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (const DependentSizedArrayType *DependentArrayArg 1335199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor = dyn_cast<DependentSizedArrayType>(ArrayArg)) 133634c2f8c8a16226f757947bf08c5f799d99c9ac1eDouglas Gregor if (DependentArrayArg->getSizeExpr()) 133734c2f8c8a16226f757947bf08c5f799d99c9ac1eDouglas Gregor return DeduceNonTypeTemplateArgument(S, NTTP, 133834c2f8c8a16226f757947bf08c5f799d99c9ac1eDouglas Gregor DependentArrayArg->getSizeExpr(), 133934c2f8c8a16226f757947bf08c5f799d99c9ac1eDouglas Gregor Info, Deduced); 13401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1341199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Incomplete type does not match a dependently-sized array type 1342f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1343199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 13441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // type(*)(T) 13461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(*)() 13471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(*)(T) 1348a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson case Type::FunctionProto: { 134973b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor unsigned SubTDF = TDF & TDF_TopLevelParameterTypeList; 13501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const FunctionProtoType *FunctionProtoArg = 1351a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson dyn_cast<FunctionProtoType>(Arg); 1352a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson if (!FunctionProtoArg) 1353f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 13541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const FunctionProtoType *FunctionProtoParam = 1356a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson cast<FunctionProtoType>(Param); 1357994b6cb65c9daba2128366bc4c64be6dbf953528Anders Carlsson 1358dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (FunctionProtoParam->getTypeQuals() 1359e3c7a7ca66c02567543dbb5ec493818e00e8b177Douglas Gregor != FunctionProtoArg->getTypeQuals() || 1360dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi FunctionProtoParam->getRefQualifier() 1361e3c7a7ca66c02567543dbb5ec493818e00e8b177Douglas Gregor != FunctionProtoArg->getRefQualifier() || 1362e3c7a7ca66c02567543dbb5ec493818e00e8b177Douglas Gregor FunctionProtoParam->isVariadic() != FunctionProtoArg->isVariadic()) 1363f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1364994b6cb65c9daba2128366bc4c64be6dbf953528Anders Carlsson 1365a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson // Check return types. 1366f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 1367bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1368bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl FunctionProtoParam->getResultType(), 1369bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl FunctionProtoArg->getResultType(), 1370bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, 0)) 1371f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 13721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1373603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor return DeduceTemplateArguments(S, TemplateParams, 1374603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor FunctionProtoParam->arg_type_begin(), 1375603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor FunctionProtoParam->getNumArgs(), 1376603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor FunctionProtoArg->arg_type_begin(), 1377603cfb4da2f7ba08a1c3452c2fbf70585b8e7621Douglas Gregor FunctionProtoArg->getNumArgs(), 137873b3cf6503f72f054288cf474e1a8c8ae56383c2Douglas Gregor Info, Deduced, SubTDF); 1379a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson } 13801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13813cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall case Type::InjectedClassName: { 13823cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall // Treat a template's injected-class-name as if the template 13833cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall // specialization type had been used. 138431f17ecbef57b5679c017c375db330546b7b5145John McCall Param = cast<InjectedClassNameType>(Param) 138531f17ecbef57b5679c017c375db330546b7b5145John McCall ->getInjectedSpecializationType(); 13863cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall assert(isa<TemplateSpecializationType>(Param) && 13873cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall "injected class name is not a template specialization type"); 13883cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall // fall through 13893cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall } 13903cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall 1391f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor // template-name<T> (where template-name refers to a class template) 1392d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor // template-name<i> 1393db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // TT<T> 1394db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // TT<i> 1395db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // TT<> 1396d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor case Type::TemplateSpecialization: { 1397d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor const TemplateSpecializationType *SpecParam 1398d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor = cast<TemplateSpecializationType>(Param); 13991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1400de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Try to deduce template arguments from the template-id. 1401de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Sema::TemplateDeductionResult Result 1402a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, SpecParam, Arg, 1403de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced); 14041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14054a5c15f75f76b95e1c2ceb6fa2737dcadd5f4be1Douglas Gregor if (Result && (TDF & TDF_DerivedClass)) { 1406de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // C++ [temp.deduct.call]p3b3: 1407de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If P is a class, and P has the form template-id, then A can be a 1408de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // derived class of the deduced A. Likewise, if P is a pointer to a 14091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // class of the form template-id, A can be a pointer to a derived 1410de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // class pointed to by the deduced A. 1411de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // 1412de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // More importantly: 14131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // These alternatives are considered only if type deduction would 1414de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // otherwise fail. 1415a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (const RecordType *RecordT = Arg->getAs<RecordType>()) { 1416a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth // We cannot inspect base classes as part of deduction when the type 1417a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth // is incomplete, so either instantiate any templates necessary to 1418a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth // complete the type, or skip over it if it cannot be completed. 14195769d6195087229770d7ac90449443e026c47103John McCall if (S.RequireCompleteType(Info.getLocation(), Arg, 0)) 1420a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return Result; 1421a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth 1422de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Use data recursion to crawl through the list of base classes. 14231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Visited contains the set of nodes we have already visited, while 1424de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // ToVisit is our stack of records that we still need to visit. 1425de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor llvm::SmallPtrSet<const RecordType *, 8> Visited; 14265f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<const RecordType *, 8> ToVisit; 1427de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor ToVisit.push_back(RecordT); 1428de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor bool Successful = false; 142974fe66181db91d45d48f57abe325ea487e32ddbcBenjamin Kramer SmallVector<DeducedTemplateArgument, 8> DeducedOrig(Deduced.begin(), 143074fe66181db91d45d48f57abe325ea487e32ddbcBenjamin Kramer Deduced.end()); 1431de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor while (!ToVisit.empty()) { 1432de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Retrieve the next class in the inheritance hierarchy. 1433de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor const RecordType *NextT = ToVisit.back(); 1434de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor ToVisit.pop_back(); 14351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1436de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If we have already seen this type, skip it. 1437de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (!Visited.insert(NextT)) 1438de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor continue; 14391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1440de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If this is a base class, try to perform template argument 1441de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // deduction from it. 1442de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (NextT != RecordT) { 1443910515bc02872bd680e422f75079534d00093bc5Richard Trieu TemplateDeductionInfo BaseInfo(Info.getLocation()); 1444de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Sema::TemplateDeductionResult BaseResult 1445a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, SpecParam, 1446910515bc02872bd680e422f75079534d00093bc5Richard Trieu QualType(NextT, 0), BaseInfo, 1447910515bc02872bd680e422f75079534d00093bc5Richard Trieu Deduced); 14481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1449de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If template argument deduction for this base was successful, 1450053105d58552c600a2e56473592212a9bddafcd4Douglas Gregor // note that we had some success. Otherwise, ignore any deductions 1451053105d58552c600a2e56473592212a9bddafcd4Douglas Gregor // from this base class. 1452053105d58552c600a2e56473592212a9bddafcd4Douglas Gregor if (BaseResult == Sema::TDK_Success) { 1453de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Successful = true; 145474fe66181db91d45d48f57abe325ea487e32ddbcBenjamin Kramer DeducedOrig.clear(); 145574fe66181db91d45d48f57abe325ea487e32ddbcBenjamin Kramer DeducedOrig.append(Deduced.begin(), Deduced.end()); 1456910515bc02872bd680e422f75079534d00093bc5Richard Trieu Info.Param = BaseInfo.Param; 1457910515bc02872bd680e422f75079534d00093bc5Richard Trieu Info.FirstArg = BaseInfo.FirstArg; 1458910515bc02872bd680e422f75079534d00093bc5Richard Trieu Info.SecondArg = BaseInfo.SecondArg; 1459053105d58552c600a2e56473592212a9bddafcd4Douglas Gregor } 1460053105d58552c600a2e56473592212a9bddafcd4Douglas Gregor else 1461053105d58552c600a2e56473592212a9bddafcd4Douglas Gregor Deduced = DeducedOrig; 1462de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 14631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1464de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Visit base classes 1465de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor CXXRecordDecl *Next = cast<CXXRecordDecl>(NextT->getDecl()); 1466de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor for (CXXRecordDecl::base_class_iterator Base = Next->bases_begin(), 1467de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor BaseEnd = Next->bases_end(); 14689994a34f6cf842721ba7723edc0b9036229fe387Sebastian Redl Base != BaseEnd; ++Base) { 14691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(Base->getType()->isRecordType() && 1470de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor "Base class that isn't a record?"); 14716217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek ToVisit.push_back(Base->getType()->getAs<RecordType>()); 1472de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 1473de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 14741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1475de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (Successful) 1476de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_Success; 1477de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 14781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1479de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 14801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1481de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 1482d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor } 1483d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor 1484637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T type::* 1485637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T T::* 1486637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (type::*)() 1487637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // type (T::*)() 1488637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // type (type::*)(T) 1489637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // type (T::*)(T) 1490637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (type::*)(T) 1491637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (T::*)() 1492637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (T::*)(T) 1493637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor case Type::MemberPointer: { 1494637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor const MemberPointerType *MemPtrParam = cast<MemberPointerType>(Param); 1495637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor const MemberPointerType *MemPtrArg = dyn_cast<MemberPointerType>(Arg); 1496637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor if (!MemPtrArg) 1497f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1498f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 1499f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 1500bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1501bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl MemPtrParam->getPointeeType(), 1502bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl MemPtrArg->getPointeeType(), 1503bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, 1504bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl TDF & TDF_IgnoreQualifiers)) 1505f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 1506f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 1507bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1508bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl QualType(MemPtrParam->getClass(), 0), 1509bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl QualType(MemPtrArg->getClass(), 0), 1510fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor Info, Deduced, 1511fc55a8290a3e81111c0a373e1a04b09dd7da0b98Douglas Gregor TDF & TDF_IgnoreQualifiers); 1512637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor } 1513637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor 15149a917e4fac79aba20fbd25983c78396475078918Anders Carlsson // (clang extension) 15159a917e4fac79aba20fbd25983c78396475078918Anders Carlsson // 15161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // type(^)(T) 15171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(^)() 15181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(^)(T) 1519859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson case Type::BlockPointer: { 1520859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson const BlockPointerType *BlockPtrParam = cast<BlockPointerType>(Param); 1521859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson const BlockPointerType *BlockPtrArg = dyn_cast<BlockPointerType>(Arg); 15221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1523859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson if (!BlockPtrArg) 1524f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 15251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1526bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1527bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl BlockPtrParam->getPointeeType(), 1528bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl BlockPtrArg->getPointeeType(), 1529bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, 0); 1530859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson } 1531859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson 15324ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // (clang extension) 15334ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // 15344ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // T __attribute__(((ext_vector_type(<integral constant>)))) 15354ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::ExtVector: { 15364ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor const ExtVectorType *VectorParam = cast<ExtVectorType>(Param); 15374ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (const ExtVectorType *VectorArg = dyn_cast<ExtVectorType>(Arg)) { 15384ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Make sure that the vectors have the same number of elements. 15394ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (VectorParam->getNumElements() != VectorArg->getNumElements()) 15404ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Sema::TDK_NonDeducedMismatch; 15414ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15424ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Perform deduction on the element types. 1543bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1544bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorParam->getElementType(), 1545bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorArg->getElementType(), 1546bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF); 15474ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor } 15484ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15494ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (const DependentSizedExtVectorType *VectorArg 15504ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor = dyn_cast<DependentSizedExtVectorType>(Arg)) { 15514ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // We can't check the number of elements, since the argument has a 15524ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // dependent number of elements. This can only occur during partial 15534ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // ordering. 15544ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15554ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Perform deduction on the element types. 1556bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1557bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorParam->getElementType(), 1558bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorArg->getElementType(), 1559bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF); 15604ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor } 15614ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15624ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Sema::TDK_NonDeducedMismatch; 15634ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor } 15644ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15654ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // (clang extension) 15664ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // 15674ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // T __attribute__(((ext_vector_type(N)))) 15684ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::DependentSizedExtVector: { 15694ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor const DependentSizedExtVectorType *VectorParam 15704ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor = cast<DependentSizedExtVectorType>(Param); 15714ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15724ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (const ExtVectorType *VectorArg = dyn_cast<ExtVectorType>(Arg)) { 15734ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Perform deduction on the element types. 15744ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (Sema::TemplateDeductionResult Result 1575bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1576bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorParam->getElementType(), 1577bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorArg->getElementType(), 1578bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF)) 15794ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Result; 15804ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15814ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Perform deduction on the vector size, if we can. 15824ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor NonTypeTemplateParmDecl *NTTP 15834ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor = getDeducedParameterFromExpr(VectorParam->getSizeExpr()); 15844ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (!NTTP) 15854ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Sema::TDK_Success; 15864ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15874ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor llvm::APSInt ArgSize(S.Context.getTypeSize(S.Context.IntTy), false); 15884ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor ArgSize = VectorArg->getNumElements(); 15894ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return DeduceNonTypeTemplateArgument(S, NTTP, ArgSize, S.Context.IntTy, 15904ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor false, Info, Deduced); 15914ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor } 15924ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 15934ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (const DependentSizedExtVectorType *VectorArg 15944ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor = dyn_cast<DependentSizedExtVectorType>(Arg)) { 15954ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Perform deduction on the element types. 15964ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (Sema::TemplateDeductionResult Result 1597bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1598bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorParam->getElementType(), 1599bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl VectorArg->getElementType(), 1600bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF)) 16014ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Result; 16024ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 16034ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor // Perform deduction on the vector size, if we can. 16044ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor NonTypeTemplateParmDecl *NTTP 16054ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor = getDeducedParameterFromExpr(VectorParam->getSizeExpr()); 16064ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor if (!NTTP) 16074ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Sema::TDK_Success; 16084ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 16094ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return DeduceNonTypeTemplateArgument(S, NTTP, VectorArg->getSizeExpr(), 16104ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor Info, Deduced); 16114ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor } 16124ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 16134ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor return Sema::TDK_NonDeducedMismatch; 16144ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor } 16154ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor 1616637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor case Type::TypeOfExpr: 1617637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor case Type::TypeOf: 16184714c12a1ab759156b78be8f109ea4c12213af57Douglas Gregor case Type::DependentName: 16194ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::UnresolvedUsing: 16204ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::Decltype: 16214ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::UnaryTransform: 16224ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::Auto: 16234ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::DependentTemplateSpecialization: 16244ac01401b1ec602a1f58c217544d3dcb5fcbd7f1Douglas Gregor case Type::PackExpansion: 1625637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // No template argument deduction for these types 1626f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 16270b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 16280b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 16293026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie llvm_unreachable("Invalid Type Class!"); 16300b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 16310b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 1632f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 1633a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 1634f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateParameterList *TemplateParams, 1635f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor const TemplateArgument &Param, 163677d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor TemplateArgument Arg, 16372a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 16385f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 163977d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // If the template argument is a pack expansion, perform template argument 164077d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // deduction against the pattern of that expansion. This only occurs during 164177d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // partial ordering. 164277d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor if (Arg.isPackExpansion()) 164377d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor Arg = Arg.getPackExpansionPattern(); 1644dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 16450b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor switch (Param.getKind()) { 1646199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Null: 1647b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Null template argument in parameter list"); 16481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case TemplateArgument::Type: 1650788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor if (Arg.getKind() == TemplateArgument::Type) 1651bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 1652bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Param.getAsType(), 1653bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Arg.getAsType(), 1654bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, 0); 1655788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.FirstArg = Param; 1656788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.SecondArg = Arg; 1657788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return Sema::TDK_NonDeducedMismatch; 1658a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor 1659788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Template: 1660db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor if (Arg.getKind() == TemplateArgument::Template) 1661dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeduceTemplateArguments(S, TemplateParams, 1662788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Param.getAsTemplate(), 1663db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Arg.getAsTemplate(), Info, Deduced); 1664788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.FirstArg = Param; 1665788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.SecondArg = Arg; 1666788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return Sema::TDK_NonDeducedMismatch; 1667a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor 1668a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor case TemplateArgument::TemplateExpansion: 1669a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor llvm_unreachable("caller should handle pack expansions"); 1670dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1671199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Declaration: 1672788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor if (Arg.getKind() == TemplateArgument::Declaration && 1673d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman isSameDeclaration(Param.getAsDecl(), Arg.getAsDecl()) && 1674d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman Param.isDeclForReferenceParam() == Arg.isDeclForReferenceParam()) 1675d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return Sema::TDK_Success; 1676d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 1677d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman Info.FirstArg = Param; 1678d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman Info.SecondArg = Arg; 1679d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return Sema::TDK_NonDeducedMismatch; 1680d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 1681d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman case TemplateArgument::NullPtr: 1682d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman if (Arg.getKind() == TemplateArgument::NullPtr && 1683d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman S.Context.hasSameType(Param.getNullPtrType(), Arg.getNullPtrType())) 1684788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return Sema::TDK_Success; 1685dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1686f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 1687f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 1688f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 16891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1690199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Integral: 1691199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Arg.getKind() == TemplateArgument::Integral) { 1692855243789cb44799c03f4c7216d3d6308805f549Benjamin Kramer if (hasSameExtendedValue(Param.getAsIntegral(), Arg.getAsIntegral())) 1693f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 1694f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 1695f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 1696f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 1697f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1698f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 1699f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 1700f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Arg.getKind() == TemplateArgument::Expression) { 1701f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 1702f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 1703f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1704199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 1705199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 1706f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 1707f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 1708f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 17091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1710199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Expression: { 17111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (NonTypeTemplateParmDecl *NTTP 1712199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor = getDeducedParameterFromExpr(Param.getAsExpr())) { 1713199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Arg.getKind() == TemplateArgument::Integral) 1714a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceNonTypeTemplateArgument(S, NTTP, 1715855243789cb44799c03f4c7216d3d6308805f549Benjamin Kramer Arg.getAsIntegral(), 17169d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Arg.getIntegralType(), 171702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor /*ArrayBound=*/false, 1718f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced); 1719199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Arg.getKind() == TemplateArgument::Expression) 1720a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceNonTypeTemplateArgument(S, NTTP, Arg.getAsExpr(), 1721f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced); 172215755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor if (Arg.getKind() == TemplateArgument::Declaration) 1723a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceNonTypeTemplateArgument(S, NTTP, Arg.getAsDecl(), 172415755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor Info, Deduced); 1725dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1726f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 1727f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 1728f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 1729199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 17301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1731199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Can't deduce anything, but that's okay. 1732f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 1733199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 1734d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson case TemplateArgument::Pack: 173520a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor llvm_unreachable("Argument packs should be expanded by the caller!"); 17360b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 17371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17383026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie llvm_unreachable("Invalid TemplateArgument Kind!"); 17390b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 17400b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 174120a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// \brief Determine whether there is a template argument to be used for 174220a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// deduction. 174320a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// 174420a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// This routine "expands" argument packs in-place, overriding its input 174520a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// parameters so that \c Args[ArgIdx] will be the available template argument. 174620a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// 174720a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// \returns true if there is another template argument (which will be at 174820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor/// \c Args[ArgIdx]), false otherwise. 1749dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumistatic bool hasTemplateArgumentForDeduction(const TemplateArgument *&Args, 175020a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor unsigned &ArgIdx, 175120a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor unsigned &NumArgs) { 175220a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor if (ArgIdx == NumArgs) 175320a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor return false; 1754dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 175520a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor const TemplateArgument &Arg = Args[ArgIdx]; 175620a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor if (Arg.getKind() != TemplateArgument::Pack) 175720a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor return true; 175820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor 175920a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor assert(ArgIdx == NumArgs - 1 && "Pack not at the end of argument list?"); 176020a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor Args = Arg.pack_begin(); 176120a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor NumArgs = Arg.pack_size(); 176220a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor ArgIdx = 0; 176320a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor return ArgIdx < NumArgs; 176420a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor} 176520a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor 17667b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor/// \brief Determine whether the given set of template arguments has a pack 17677b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor/// expansion that is not the last template argument. 17687b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregorstatic bool hasPackExpansionBeforeEnd(const TemplateArgument *Args, 17697b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor unsigned NumArgs) { 17707b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor unsigned ArgIdx = 0; 17717b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor while (ArgIdx < NumArgs) { 17727b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor const TemplateArgument &Arg = Args[ArgIdx]; 1773dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17747b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor // Unwrap argument packs. 17757b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor if (Args[ArgIdx].getKind() == TemplateArgument::Pack) { 17767b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor Args = Arg.pack_begin(); 17777b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor NumArgs = Arg.pack_size(); 17787b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor ArgIdx = 0; 17797b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor continue; 17807b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor } 1781dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17827b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor ++ArgIdx; 17837b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor if (ArgIdx == NumArgs) 17847b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor return false; 1785dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17867b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor if (Arg.isPackExpansion()) 17877b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor return true; 17887b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor } 1789dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 17907b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor return false; 17917b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor} 17927b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor 17931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic Sema::TemplateDeductionResult 1794a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 1795f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateParameterList *TemplateParams, 179620a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor const TemplateArgument *Params, unsigned NumParams, 179720a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor const TemplateArgument *Args, unsigned NumArgs, 17982a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info, 1799030a6644f253818b81b4d8a7fc1770c0a3d35474Richard Smith SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 1800e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // C++0x [temp.deduct.type]p9: 1801dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If the template argument list of P contains a pack expansion that is not 1802dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // the last template argument, the entire template argument list is a 1803e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // non-deduced context. 18047b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor if (hasPackExpansionBeforeEnd(Params, NumParams)) 18057b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor return Sema::TDK_Success; 1806dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1807e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // C++0x [temp.deduct.type]p9: 1808dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If P has a form that contains <T> or <i>, then each argument Pi of the 1809dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // respective template argument list P is compared with the corresponding 1810e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // argument Ai of the corresponding template argument list of A. 181120a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor unsigned ArgIdx = 0, ParamIdx = 0; 1812dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi for (; hasTemplateArgumentForDeduction(Params, ParamIdx, NumParams); 181320a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor ++ParamIdx) { 181420a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor if (!Params[ParamIdx].isPackExpansion()) { 1815e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // The simple case: deduce template arguments by matching Pi and Ai. 1816dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 181720a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor // Check whether we have enough arguments. 181820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor if (!hasTemplateArgumentForDeduction(Args, ArgIdx, NumArgs)) 1819030a6644f253818b81b4d8a7fc1770c0a3d35474Richard Smith return Sema::TDK_Success; 1820dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 182177d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor if (Args[ArgIdx].isPackExpansion()) { 182277d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // FIXME: We follow the logic of C++0x [temp.deduct.type]p22 here, 182377d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor // but applied to pack expansions that are template arguments. 182429805ca6d278b4d9563adfee67f2478f0fecdcfcRichard Smith return Sema::TDK_MiscellaneousDeductionFailure; 182577d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor } 1826dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1827e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // Perform deduction for this Pi/Ai pair. 182820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor if (Sema::TemplateDeductionResult Result 182977d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor = DeduceTemplateArguments(S, TemplateParams, 183077d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor Params[ParamIdx], Args[ArgIdx], 183177d6bb9e223496aa5288294f34e7225d1f65dddcDouglas Gregor Info, Deduced)) 1832dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Result; 1833dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 183420a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor // Move to the next argument. 183520a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor ++ArgIdx; 183620a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor continue; 183720a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor } 1838dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1839e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // The parameter is a pack expansion. 1840dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1841e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // C++0x [temp.deduct.type]p9: 1842dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If Pi is a pack expansion, then the pattern of Pi is compared with 1843dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // each remaining argument in the template argument list of A. Each 1844dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // comparison deduces template arguments for subsequent positions in the 1845e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // template parameter packs expanded by Pi. 1846e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor TemplateArgument Pattern = Params[ParamIdx].getPackExpansionPattern(); 1847dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1848e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // Compute the set of template parameter indices that correspond to 1849e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // parameter packs expanded by the pack expansion. 18505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<unsigned, 2> PackIndices; 1851e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor { 1852013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector SawIndices(TemplateParams->size()); 18535f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<UnexpandedParameterPack, 2> Unexpanded; 1854e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor S.collectUnexpandedParameterPacks(Pattern, Unexpanded); 1855e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor for (unsigned I = 0, N = Unexpanded.size(); I != N; ++I) { 1856e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor unsigned Depth, Index; 1857e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor llvm::tie(Depth, Index) = getDepthAndIndex(Unexpanded[I]); 1858e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor if (Depth == 0 && !SawIndices[Index]) { 1859e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor SawIndices[Index] = true; 1860e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor PackIndices.push_back(Index); 1861e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor } 1862e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor } 1863e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor } 1864e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor assert(!PackIndices.empty() && "Pack expansion without unexpanded packs?"); 1865dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1866e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // FIXME: If there are no remaining arguments, we can bail out early 1867e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // and set any deduced parameter packs to an empty argument pack. 1868e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // The latter part of this is a (minor) correctness issue. 1869dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1870e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // Save the deduced template arguments for each parameter pack expanded 1871e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // by this pack expansion, then clear out the deduction. 18725f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 2> 1873e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor SavedPacks(PackIndices.size()); 18745f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<SmallVector<DeducedTemplateArgument, 4>, 2> 18755429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor NewlyDeducedPacks(PackIndices.size()); 1876dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi PrepareArgumentPackDeduction(S, Deduced, PackIndices, SavedPacks, 18775429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor NewlyDeducedPacks); 1878e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor 1879e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // Keep track of the deduced template arguments for each parameter pack 1880dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // expanded by this pack expansion (the outer index) and for each 1881e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // template argument (the inner SmallVectors). 1882e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor bool HasAnyArguments = false; 1883e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor while (hasTemplateArgumentForDeduction(Args, ArgIdx, NumArgs)) { 1884e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor HasAnyArguments = true; 1885dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1886e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // Deduce template arguments from the pattern. 1887dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (Sema::TemplateDeductionResult Result 1888e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor = DeduceTemplateArguments(S, TemplateParams, Pattern, Args[ArgIdx], 1889e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor Info, Deduced)) 1890e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor return Result; 1891dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1892e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // Capture the deduced template arguments for each parameter pack expanded 1893e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // by this pack expansion, add them to the list of arguments we've deduced 1894e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // for that pack, then clear out the deduced argument. 1895e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor for (unsigned I = 0, N = PackIndices.size(); I != N; ++I) { 1896e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor DeducedTemplateArgument &DeducedArg = Deduced[PackIndices[I]]; 1897e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor if (!DeducedArg.isNull()) { 1898e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor NewlyDeducedPacks[I].push_back(DeducedArg); 1899e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor DeducedArg = DeducedTemplateArgument(); 1900e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor } 1901e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor } 1902dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1903e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor ++ArgIdx; 1904e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor } 1905dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1906e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // Build argument packs for each of the parameter packs expanded by this 1907e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor // pack expansion. 19080216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor if (Sema::TemplateDeductionResult Result 1909dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = FinishArgumentPackDeduction(S, TemplateParams, HasAnyArguments, 19100216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Deduced, PackIndices, SavedPacks, 19110216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor NewlyDeducedPacks, Info)) 1912dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Result; 19130b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 1914dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1915f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 19160b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 19170b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 191820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregorstatic Sema::TemplateDeductionResult 191920a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas GregorDeduceTemplateArguments(Sema &S, 192020a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor TemplateParameterList *TemplateParams, 192120a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor const TemplateArgumentList &ParamList, 192220a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor const TemplateArgumentList &ArgList, 192320a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor TemplateDeductionInfo &Info, 19245f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 1925dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return DeduceTemplateArguments(S, TemplateParams, 192620a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor ParamList.data(), ParamList.size(), 192720a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor ArgList.data(), ArgList.size(), 192820a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor Info, Deduced); 192920a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor} 193020a55e2515ce89ddf9993941f9b5d0f3a6c91b4fDouglas Gregor 1931f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor/// \brief Determine whether two template arguments are the same. 19321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic bool isSameTemplateArg(ASTContext &Context, 1933f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor const TemplateArgument &X, 1934f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor const TemplateArgument &Y) { 1935f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (X.getKind() != Y.getKind()) 1936f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return false; 19371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1938f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor switch (X.getKind()) { 1939f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Null: 1940b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Comparing NULL template argument"); 19411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1942f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Type: 1943f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return Context.getCanonicalType(X.getAsType()) == 1944f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Context.getCanonicalType(Y.getAsType()); 19451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1946f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Declaration: 1947d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return isSameDeclaration(X.getAsDecl(), Y.getAsDecl()) && 1948d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman X.isDeclForReferenceParam() == Y.isDeclForReferenceParam(); 1949d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 1950d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman case TemplateArgument::NullPtr: 1951d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return Context.hasSameType(X.getNullPtrType(), Y.getNullPtrType()); 19521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1953788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Template: 1954a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor case TemplateArgument::TemplateExpansion: 1955a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor return Context.getCanonicalTemplateName( 1956a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor X.getAsTemplateOrTemplatePattern()).getAsVoidPointer() == 1957a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor Context.getCanonicalTemplateName( 1958a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor Y.getAsTemplateOrTemplatePattern()).getAsVoidPointer(); 1959dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 1960f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Integral: 1961855243789cb44799c03f4c7216d3d6308805f549Benjamin Kramer return X.getAsIntegral() == Y.getAsIntegral(); 19621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1963788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Expression: { 1964788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor llvm::FoldingSetNodeID XID, YID; 1965788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor X.getAsExpr()->Profile(XID, Context, true); 1966dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Y.getAsExpr()->Profile(YID, Context, true); 1967788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return XID == YID; 1968788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor } 19691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1970f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Pack: 1971f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (X.pack_size() != Y.pack_size()) 1972f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return false; 19731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (TemplateArgument::pack_iterator XP = X.pack_begin(), 19751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump XPEnd = X.pack_end(), 1976f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor YP = Y.pack_begin(); 19771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump XP != XPEnd; ++XP, ++YP) 1978f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (!isSameTemplateArg(Context, *XP, *YP)) 1979f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return false; 1980f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor 1981f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return true; 1982f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor } 1983f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor 19843026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie llvm_unreachable("Invalid TemplateArgument Kind!"); 1985f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor} 1986f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor 198754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// \brief Allocate a TemplateArgumentLoc where all locations have 198854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// been initialized to the given location. 198954c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// 199054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// \param S The semantic analysis object. 199154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// 19921dfbd92c83699820bfaa352e83083124e34fc9dcJames Dennett/// \param Arg The template argument we are producing template argument 199354c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// location information for. 199454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// 199554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// \param NTTPType For a declaration template argument, the type of 199654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// the non-type template parameter that corresponds to this template 199754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// argument. 199854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// 199954c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// \param Loc The source location to use for the resulting template 200054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// argument. 2001dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumistatic TemplateArgumentLoc 200254c53cca105ed595e12fecf04e415c3712bda936Douglas GregorgetTrivialTemplateArgumentLoc(Sema &S, 2003dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi const TemplateArgument &Arg, 200454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor QualType NTTPType, 200554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor SourceLocation Loc) { 200654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor switch (Arg.getKind()) { 200754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor case TemplateArgument::Null: 200854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor llvm_unreachable("Can't get a NULL template argument here"); 2009dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 201054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor case TemplateArgument::Type: 2011dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return TemplateArgumentLoc(Arg, 201254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor S.Context.getTrivialTypeSourceInfo(Arg.getAsType(), Loc)); 2013dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 201454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor case TemplateArgument::Declaration: { 201554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Expr *E 2016ba68eca7582a62e3e2ff4b0eba1b2b73a6b80895Douglas Gregor = S.BuildExpressionFromDeclTemplateArgument(Arg, NTTPType, Loc) 2017d2008e2c80d6c9282044ec873a937a17a0f33579Douglas Gregor .takeAs<Expr>(); 201854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return TemplateArgumentLoc(TemplateArgument(E), E); 201954c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor } 2020dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2021d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman case TemplateArgument::NullPtr: { 2022d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman Expr *E 2023d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman = S.BuildExpressionFromDeclTemplateArgument(Arg, NTTPType, Loc) 2024d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman .takeAs<Expr>(); 2025d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman return TemplateArgumentLoc(TemplateArgument(NTTPType, /*isNullPtr*/true), 2026d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman E); 2027d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman } 2028d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 202954c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor case TemplateArgument::Integral: { 203054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Expr *E 2031ba68eca7582a62e3e2ff4b0eba1b2b73a6b80895Douglas Gregor = S.BuildExpressionFromIntegralTemplateArgument(Arg, Loc).takeAs<Expr>(); 203254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return TemplateArgumentLoc(TemplateArgument(E), E); 203354c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor } 2034dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2035b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor case TemplateArgument::Template: 2036b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor case TemplateArgument::TemplateExpansion: { 2037b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor NestedNameSpecifierLocBuilder Builder; 2038b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor TemplateName Template = Arg.getAsTemplate(); 2039b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor if (DependentTemplateName *DTN = Template.getAsDependentTemplateName()) 2040b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor Builder.MakeTrivial(S.Context, DTN->getQualifier(), Loc); 2041b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor else if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2042b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor Builder.MakeTrivial(S.Context, QTN->getQualifier(), Loc); 2043b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor 2044b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor if (Arg.getKind() == TemplateArgument::Template) 2045b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor return TemplateArgumentLoc(Arg, 2046b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor Builder.getWithLocInContext(S.Context), 2047b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor Loc); 2048b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor 2049b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor 2050b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor return TemplateArgumentLoc(Arg, Builder.getWithLocInContext(S.Context), 2051b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor Loc, Loc); 2052b6744efecba58792cce20d2d7b9ee39927c5422eDouglas Gregor } 2053a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor 205454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor case TemplateArgument::Expression: 205554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return TemplateArgumentLoc(Arg, Arg.getAsExpr()); 2056dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 205754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor case TemplateArgument::Pack: 205854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return TemplateArgumentLoc(Arg, TemplateArgumentLocInfo()); 205954c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor } 2060dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 20613026348bd4c13a0f83b59839f64065e0fcbea253David Blaikie llvm_unreachable("Invalid TemplateArgument Kind!"); 206254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor} 206354c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor 206454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor 206554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// \brief Convert the given deduced template argument and add it to the set of 206654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor/// fully-converted template arguments. 2067dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumistatic bool ConvertDeducedTemplateArgument(Sema &S, NamedDecl *Param, 206854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor DeducedTemplateArgument Arg, 2069dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NamedDecl *Template, 2070dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi QualType NTTPType, 20716952f1e4256c5b43aee5e98cea4e9b663bd1d413Douglas Gregor unsigned ArgumentPackIndex, 207254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor TemplateDeductionInfo &Info, 207354c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor bool InFunctionTemplate, 20745f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<TemplateArgument> &Output) { 207554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor if (Arg.getKind() == TemplateArgument::Pack) { 207654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // This is a template argument pack, so check each of its arguments against 207754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // the template parameter. 20785f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TemplateArgument, 2> PackedArgsBuilder; 2079dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi for (TemplateArgument::pack_iterator PA = Arg.pack_begin(), 2080135ffa7375fb5802b92f42774e02d0e6e4c78e5bDouglas Gregor PAEnd = Arg.pack_end(); 208154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor PA != PAEnd; ++PA) { 2082d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor // When converting the deduced template argument, append it to the 2083d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor // general output list. We need to do this so that the template argument 2084d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor // checking logic has all of the prior template arguments available. 208554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor DeducedTemplateArgument InnerArg(*PA); 208654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor InnerArg.setDeducedFromArrayBound(Arg.wasDeducedFromArrayBound()); 2087dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (ConvertDeducedTemplateArgument(S, Param, InnerArg, Template, 20886952f1e4256c5b43aee5e98cea4e9b663bd1d413Douglas Gregor NTTPType, PackedArgsBuilder.size(), 20896952f1e4256c5b43aee5e98cea4e9b663bd1d413Douglas Gregor Info, InFunctionTemplate, Output)) 209054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return true; 2091dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2092d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor // Move the converted template argument into our argument pack. 2093d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor PackedArgsBuilder.push_back(Output.back()); 2094d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor Output.pop_back(); 209554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor } 2096dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 209754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // Create the resulting argument pack. 2098dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Output.push_back(TemplateArgument::CreatePackCopy(S.Context, 2099203e6a322ae29d577acafcb1572a57ec16e1e730Douglas Gregor PackedArgsBuilder.data(), 2100203e6a322ae29d577acafcb1572a57ec16e1e730Douglas Gregor PackedArgsBuilder.size())); 210154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return false; 210254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor } 2103dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 210454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // Convert the deduced template argument into a template 210554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // argument that we can check, almost as if the user had written 210654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // the template argument explicitly. 210754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor TemplateArgumentLoc ArgLoc = getTrivialTemplateArgumentLoc(S, Arg, NTTPType, 210854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Info.getLocation()); 2109dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 211054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // Check the template argument, converting it as necessary. 211154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return S.CheckTemplateArgument(Param, ArgLoc, 211254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Template, 211354c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Template->getLocation(), 211454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Template->getSourceRange().getEnd(), 21156952f1e4256c5b43aee5e98cea4e9b663bd1d413Douglas Gregor ArgumentPackIndex, 211654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Output, 211754c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor InFunctionTemplate 211854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor ? (Arg.wasDeducedFromArrayBound() 2119dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi ? Sema::CTAK_DeducedFromArrayBound 212054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor : Sema::CTAK_Deduced) 212154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor : Sema::CTAK_Specified); 212254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor} 212354c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor 212431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// Complete template argument deduction for a class template partial 212531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// specialization. 212631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregorstatic Sema::TemplateDeductionResult 2127dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA TakumiFinishTemplateArgumentDeduction(Sema &S, 212831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor ClassTemplatePartialSpecializationDecl *Partial, 212931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor const TemplateArgumentList &TemplateArgs, 21305f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced, 21312a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall TemplateDeductionInfo &Info) { 213259a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman // Unevaluated SFINAE context. 213359a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman EnterExpressionEvaluationContext Unevaluated(S, Sema::Unevaluated); 213431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Sema::SFINAETrap Trap(S); 2135dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 213631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Sema::ContextRAII SavedContext(S, Partial); 2137f5813826802c2e76cdc13cae834ebfd4518d74a6John McCall 213802cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // C++ [temp.deduct.type]p2: 213902cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // [...] or if any template argument remains neither deduced nor 214002cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // explicitly specified, template argument deduction fails. 21415f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TemplateArgument, 4> Builder; 2142033a3cad525e5b221ba035ffc3e0abfa1241d90eDouglas Gregor TemplateParameterList *PartialParams = Partial->getTemplateParameters(); 2143033a3cad525e5b221ba035ffc3e0abfa1241d90eDouglas Gregor for (unsigned I = 0, N = PartialParams->size(); I != N; ++I) { 214454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor NamedDecl *Param = PartialParams->getParam(I); 2145f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Deduced[I].isNull()) { 214654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Info.Param = makeTemplateParameter(Param); 214731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_Incomplete; 2148f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 2149dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 215054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // We have deduced this argument, so it still needs to be 215154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // checked and converted. 2152dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 215354c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // First, for a non-type template parameter type that is 215454c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // initialized by a declaration, we need the type of the 215554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // corresponding non-type template parameter. 215654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor QualType NTTPType; 2157dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (NonTypeTemplateParmDecl *NTTP 2158d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor = dyn_cast<NonTypeTemplateParmDecl>(Param)) { 215954c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor NTTPType = NTTP->getType(); 2160d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor if (NTTPType->isDependentType()) { 2161dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, 2162d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor Builder.data(), Builder.size()); 2163d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor NTTPType = S.SubstType(NTTPType, 2164d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor MultiLevelTemplateArgumentList(TemplateArgs), 2165d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor NTTP->getLocation(), 2166d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor NTTP->getDeclName()); 2167d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor if (NTTPType.isNull()) { 2168d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor Info.Param = makeTemplateParameter(Param); 2169d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor // FIXME: These template arguments are temporary. Free them! 2170dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Info.reset(TemplateArgumentList::CreateCopy(S.Context, 2171dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Builder.data(), 2172d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor Builder.size())); 2173d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor return Sema::TDK_SubstitutionFailure; 2174d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor } 2175d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor } 2176d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor } 2177d53e16abd1dcaa2942d5183f48e7f63d0e75b35aDouglas Gregor 217854c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor if (ConvertDeducedTemplateArgument(S, Param, Deduced[I], 21796952f1e4256c5b43aee5e98cea4e9b663bd1d413Douglas Gregor Partial, NTTPType, 0, Info, false, 218054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Builder)) { 218154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor Info.Param = makeTemplateParameter(Param); 218254c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor // FIXME: These template arguments are temporary. Free them! 2183dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Info.reset(TemplateArgumentList::CreateCopy(S.Context, Builder.data(), 2184dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Builder.size())); 218554c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor return Sema::TDK_SubstitutionFailure; 218654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor } 218702cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor } 2188dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 218902cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // Form the template argument list from the deduced template arguments. 21901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateArgumentList *DeducedArgumentList 2191dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = TemplateArgumentList::CreateCopy(S.Context, Builder.data(), 2192910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor Builder.size()); 2193910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor 2194f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.reset(DeducedArgumentList); 219502cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor 219602cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // Substitute the deduced template arguments into the template 219702cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // arguments of the class template partial specialization, and 219802cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // verify that the instantiated template arguments are both valid 219902cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // and are equivalent to the template arguments originally provided 22001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to the class template. 22012a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall LocalInstantiationScope InstScope(S); 220202cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor ClassTemplateDecl *ClassTemplate = Partial->getSpecializedTemplate(); 2203833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall const TemplateArgumentLoc *PartialTemplateArgs 2204833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall = Partial->getTemplateArgsAsWritten(); 2205d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall 2206d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall // Note that we don't provide the langle and rangle locations. 2207d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall TemplateArgumentListInfo InstArgs; 2208d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall 2209e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor if (S.Subst(PartialTemplateArgs, 2210e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor Partial->getNumTemplateArgsAsWritten(), 2211e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor InstArgs, MultiLevelTemplateArgumentList(*DeducedArgumentList))) { 2212e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor unsigned ArgIdx = InstArgs.size(), ParamIdx = ArgIdx; 2213e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor if (ParamIdx >= Partial->getTemplateParameters()->size()) 2214e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor ParamIdx = Partial->getTemplateParameters()->size() - 1; 2215e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor 2216e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor Decl *Param 2217e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor = const_cast<NamedDecl *>( 2218e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor Partial->getTemplateParameters()->getParam(ParamIdx)); 2219e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor Info.Param = makeTemplateParameter(Param); 2220e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor Info.FirstArg = PartialTemplateArgs[ArgIdx].getArgument(); 2221e02e26293cf8e3bad1059b39cea75c6582896da6Douglas Gregor return Sema::TDK_SubstitutionFailure; 2222833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall } 2223833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall 22245f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TemplateArgument, 4> ConvertedInstArgs; 222531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (S.CheckTemplateArgumentList(ClassTemplate, Partial->getLocation(), 222654c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor InstArgs, false, ConvertedInstArgs)) 222731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 2228dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 222954c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor TemplateParameterList *TemplateParams 223054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor = ClassTemplate->getTemplateParameters(); 223154c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor for (unsigned I = 0, E = TemplateParams->size(); I != E; ++I) { 2232910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor TemplateArgument InstArg = ConvertedInstArgs.data()[I]; 223331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (!isSameTemplateArg(S.Context, TemplateArgs[I], InstArg)) { 22342fdc5e8199e1e239620f2faae88997153703e16fDouglas Gregor Info.Param = makeTemplateParameter(TemplateParams->getParam(I)); 2235f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Info.FirstArg = TemplateArgs[I]; 2236f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Info.SecondArg = InstArg; 223731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_NonDeducedMismatch; 2238f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor } 223902cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor } 224002cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor 2241bb2604122f4186b6f666481f699b27c7e7a95790Douglas Gregor if (Trap.hasErrorOccurred()) 224231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 2243bb2604122f4186b6f666481f699b27c7e7a95790Douglas Gregor 224431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_Success; 224531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor} 224631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 224731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// \brief Perform template argument deduction to determine whether 224831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// the given template arguments match the given class template 224931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// partial specialization per C++ [temp.class.spec.match]. 225031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas GregorSema::TemplateDeductionResult 225131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas GregorSema::DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 225231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor const TemplateArgumentList &TemplateArgs, 225331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor TemplateDeductionInfo &Info) { 2254ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor if (Partial->isInvalidDecl()) 2255ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor return TDK_Invalid; 2256ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor 225731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // C++ [temp.class.spec.match]p2: 225831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // A partial specialization matches a given actual template 225931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // argument list if the template arguments of the partial 226031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // specialization can be deduced from the actual template argument 226131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // list (14.8.2). 226259a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman 226359a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman // Unevaluated SFINAE context. 226459a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman EnterExpressionEvaluationContext Unevaluated(*this, Sema::Unevaluated); 226531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor SFINAETrap Trap(*this); 226659a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman 22675f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> Deduced; 226831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Deduced.resize(Partial->getTemplateParameters()->size()); 226931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (TemplateDeductionResult Result 227031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor = ::DeduceTemplateArguments(*this, 227131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Partial->getTemplateParameters(), 227231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Partial->getTemplateArgs(), 227331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor TemplateArgs, Info, Deduced)) 227431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Result; 227531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 22767e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(), Deduced.end()); 227731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor InstantiatingTemplate Inst(*this, Partial->getLocation(), Partial, 22787e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith DeducedArgs, Info); 227931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (Inst) 228031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return TDK_InstantiationDepth; 228131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 228231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (Trap.hasErrorOccurred()) 228331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 2284dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2285dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return ::FinishTemplateArgumentDeduction(*this, Partial, TemplateArgs, 228631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Deduced, Info); 22870b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 2288031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 22894112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor/// \brief Determine whether the given type T is a simple-template-id type. 22904112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregorstatic bool isSimpleTemplateIdType(QualType T) { 22911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const TemplateSpecializationType *Spec 2292183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall = T->getAs<TemplateSpecializationType>()) 22934112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor return Spec->getTemplateName().getAsTemplateDecl() != 0; 22941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22954112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor return false; 22964112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor} 229783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 229883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \brief Substitute the explicitly-provided template arguments into the 229983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// given function template according to C++ [temp.arg.explicit]. 230083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 230183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param FunctionTemplate the function template into which the explicit 230283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// template arguments will be substituted. 230383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 23041dfbd92c83699820bfaa352e83083124e34fc9dcJames Dennett/// \param ExplicitTemplateArgs the explicitly-specified template 230583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// arguments. 230683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 23071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \param Deduced the deduced template arguments, which will be populated 230883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// with the converted and checked explicit template arguments. 230983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 23101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \param ParamTypes will be populated with the instantiated function 231183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// parameters. 231283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 231383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param FunctionType if non-NULL, the result type of the function template 231483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// will also be instantiated and the pointed-to value will be updated with 231583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// the instantiated function type. 231683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 231783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param Info if substitution fails for any reason, this object will be 231883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// populated with more information about the failure. 231983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 232083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \returns TDK_Success if substitution was successful, or some failure 232183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// condition. 232283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::TemplateDeductionResult 232383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::SubstituteExplicitTemplateArguments( 232483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionTemplateDecl *FunctionTemplate, 232567714230a191bc3c01f33378f34f34ef377991a6Douglas Gregor TemplateArgumentListInfo &ExplicitTemplateArgs, 23265f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced, 23275f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<QualType> &ParamTypes, 232883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor QualType *FunctionType, 232983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateDeductionInfo &Info) { 233083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 233183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateParameterList *TemplateParams 233283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = FunctionTemplate->getTemplateParameters(); 233383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 2334d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall if (ExplicitTemplateArgs.size() == 0) { 233583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // No arguments to substitute; just copy over the parameter types and 233683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // fill in the function type. 233783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor for (FunctionDecl::param_iterator P = Function->param_begin(), 233883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor PEnd = Function->param_end(); 233983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor P != PEnd; 234083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ++P) 234183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ParamTypes.push_back((*P)->getType()); 23421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 234383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (FunctionType) 234483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor *FunctionType = Function->getType(); 234583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_Success; 234683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 23471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 234859a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman // Unevaluated SFINAE context. 234959a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman EnterExpressionEvaluationContext Unevaluated(*this, Sema::Unevaluated); 23501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SFINAETrap Trap(*this); 23511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 235283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // C++ [temp.arg.explicit]p3: 23531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Template arguments that are present shall be specified in the 23541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // declaration order of their corresponding template-parameters. The 235583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // template argument list shall not specify more template-arguments than 23561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // there are corresponding template-parameters. 23575f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TemplateArgument, 4> Builder; 23581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Enter a new template instantiation context where we check the 236083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // explicitly-specified template arguments against this function template, 236183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // and then substitute them into the function parameter types. 23627e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(), Deduced.end()); 23631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump InstantiatingTemplate Inst(*this, FunctionTemplate->getLocation(), 23647e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith FunctionTemplate, DeducedArgs, 23659b623639378d53a675921ddfa7316034d571881eDouglas Gregor ActiveTemplateInstantiation::ExplicitTemplateArgumentSubstitution, 23669b623639378d53a675921ddfa7316034d571881eDouglas Gregor Info); 236783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (Inst) 236883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_InstantiationDepth; 23691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 237083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (CheckTemplateArgumentList(FunctionTemplate, 237183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor SourceLocation(), 2372d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall ExplicitTemplateArgs, 237383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor true, 2374f1a8445036a2d047c7165d4170e3058cdeaba6ebDouglas Gregor Builder) || Trap.hasErrorOccurred()) { 2375910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor unsigned Index = Builder.size(); 2376fe52c91dcd1ecda90b579f789baf70f7a992e3c9Douglas Gregor if (Index >= TemplateParams->size()) 2377fe52c91dcd1ecda90b579f789baf70f7a992e3c9Douglas Gregor Index = TemplateParams->size() - 1; 2378fe52c91dcd1ecda90b579f789baf70f7a992e3c9Douglas Gregor Info.Param = makeTemplateParameter(TemplateParams->getParam(Index)); 237983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_InvalidExplicitArguments; 2380f1a8445036a2d047c7165d4170e3058cdeaba6ebDouglas Gregor } 23811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 238283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Form the template argument list from the explicitly-specified 238383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // template arguments. 23841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateArgumentList *ExplicitArgumentList 2385910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor = TemplateArgumentList::CreateCopy(Context, Builder.data(), Builder.size()); 238683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.reset(ExplicitArgumentList); 2387dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2388df41f18936693f7c62e457eefb9fad5b2d2fe3cdJohn McCall // Template argument deduction and the final substitution should be 2389df41f18936693f7c62e457eefb9fad5b2d2fe3cdJohn McCall // done in the context of the templated declaration. Explicit 2390df41f18936693f7c62e457eefb9fad5b2d2fe3cdJohn McCall // argument substitution, on the other hand, needs to happen in the 2391df41f18936693f7c62e457eefb9fad5b2d2fe3cdJohn McCall // calling context. 2392df41f18936693f7c62e457eefb9fad5b2d2fe3cdJohn McCall ContextRAII SavedContext(*this, FunctionTemplate->getTemplatedDecl()); 2393df41f18936693f7c62e457eefb9fad5b2d2fe3cdJohn McCall 2394dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If we deduced template arguments for a template parameter pack, 2395d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // note that the template argument pack is partially substituted and record 2396d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // the explicit template arguments. They'll be used as part of deduction 2397d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // for this template parameter pack. 2398d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor for (unsigned I = 0, N = Builder.size(); I != N; ++I) { 2399d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor const TemplateArgument &Arg = Builder[I]; 2400d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor if (Arg.getKind() == TemplateArgument::Pack) { 2401d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor CurrentInstantiationScope->SetPartiallySubstitutedPack( 2402dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi TemplateParams->getParam(I), 2403d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor Arg.pack_begin(), 2404d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor Arg.pack_size()); 2405d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor break; 2406d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor } 2407d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor } 2408d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor 2409eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith const FunctionProtoType *Proto 2410eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith = Function->getType()->getAs<FunctionProtoType>(); 2411eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith assert(Proto && "Function template does not have a prototype?"); 2412eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith 241383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Instantiate the types of each of the function parameters given the 2414eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith // explicitly-specified template arguments. If the function has a trailing 2415eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith // return type, substitute it after the arguments to ensure we substitute 2416eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith // in lexical order. 2417cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor if (Proto->hasTrailingReturn()) { 2418cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor if (SubstParmTypes(Function->getLocation(), 2419cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor Function->param_begin(), Function->getNumParams(), 2420cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor MultiLevelTemplateArgumentList(*ExplicitArgumentList), 2421cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor ParamTypes)) 2422cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor return TDK_SubstitutionFailure; 2423cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor } 2424cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor 2425eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith // Instantiate the return type. 2426eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith // FIXME: exception-specifications? 2427cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor QualType ResultType; 2428cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor { 2429cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor // C++11 [expr.prim.general]p3: 2430cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor // If a declaration declares a member function or member function 2431cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor // template of a class X, the expression this is a prvalue of type 2432cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor // "pointer to cv-qualifier-seq X" between the optional cv-qualifer-seq 2433cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor // and the end of the function-definition, member-declarator, or 2434cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor // declarator. 2435cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor unsigned ThisTypeQuals = 0; 2436cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor CXXRecordDecl *ThisContext = 0; 2437cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Function)) { 2438cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor ThisContext = Method->getParent(); 2439cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor ThisTypeQuals = Method->getTypeQualifiers(); 2440cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor } 2441cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor 2442cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor CXXThisScopeRAII ThisScope(*this, ThisContext, ThisTypeQuals, 244380ad52f327b532bded5c5b0ee38779d841c6cd35Richard Smith getLangOpts().CPlusPlus11); 2444cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor 2445cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor ResultType = SubstType(Proto->getResultType(), 2446cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor MultiLevelTemplateArgumentList(*ExplicitArgumentList), 2447cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor Function->getTypeSpecStartLoc(), 2448cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor Function->getDeclName()); 2449cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor if (ResultType.isNull() || Trap.hasErrorOccurred()) 2450cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor return TDK_SubstitutionFailure; 2451cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor } 2452cefc3afac14d29de5aba7810cc8fe6c858949e9dDouglas Gregor 2453eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith // Instantiate the types of each of the function parameters given the 2454eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith // explicitly-specified template arguments if we didn't do so earlier. 2455eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith if (!Proto->hasTrailingReturn() && 2456eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith SubstParmTypes(Function->getLocation(), 2457eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith Function->param_begin(), Function->getNumParams(), 2458eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith MultiLevelTemplateArgumentList(*ExplicitArgumentList), 2459eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith ParamTypes)) 2460eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith return TDK_SubstitutionFailure; 2461eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith 2462eefb3d5b49c844347f212073a7e975b8118fe8e9Richard Smith if (FunctionType) { 2463bea522ff43a3f11c7a2bc7949119dbb9fce19e39Jordan Rose *FunctionType = BuildFunctionType(ResultType, ParamTypes, 246483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Function->getLocation(), 2465fa869547eb1cab12d7e0c0dfa8ba594e336b9b32Eli Friedman Function->getDeclName(), 24660918989f0eed08870e50418df97d1486d977d773Jordan Rose Proto->getExtProtoInfo()); 246783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (FunctionType->isNull() || Trap.hasErrorOccurred()) 246883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_SubstitutionFailure; 246983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 24701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 247183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // C++ [temp.arg.explicit]p2: 24721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Trailing template arguments that can be deduced (14.8.2) may be 24731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // omitted from the list of explicit template-arguments. If all of the 247483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // template arguments can be deduced, they may all be omitted; in this 247583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // case, the empty template argument list <> itself may also be omitted. 247683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // 2477d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // Take all of the explicitly-specified arguments and put them into 2478d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // the set of deduced template arguments. Explicitly-specified 2479d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // parameter packs, however, will be set to NULL since the deduction 2480d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // mechanisms handle explicitly-specified argument packs directly. 248183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Deduced.reserve(TemplateParams->size()); 2482d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor for (unsigned I = 0, N = ExplicitArgumentList->size(); I != N; ++I) { 2483d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor const TemplateArgument &Arg = ExplicitArgumentList->get(I); 2484d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor if (Arg.getKind() == TemplateArgument::Pack) 2485d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor Deduced.push_back(DeducedTemplateArgument()); 2486d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor else 2487d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor Deduced.push_back(Arg); 2488d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor } 24891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 249083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_Success; 249183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor} 249283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 2493b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor/// \brief Check whether the deduced argument type for a call to a function 2494b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor/// template matches the actual argument type per C++ [temp.deduct.call]p4. 2495b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregorstatic bool 2496b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas GregorCheckOriginalCallArgDeduction(Sema &S, Sema::OriginalCallArg OriginalArg, 2497b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor QualType DeducedA) { 2498b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor ASTContext &Context = S.Context; 2499b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2500b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor QualType A = OriginalArg.OriginalArgType; 2501b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor QualType OriginalParamType = OriginalArg.OriginalParamType; 2502b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2503b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // Check for type equality (top-level cv-qualifiers are ignored). 2504b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (Context.hasSameUnqualifiedType(A, DeducedA)) 2505b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor return false; 2506b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2507b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // Strip off references on the argument types; they aren't needed for 2508b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // the following checks. 2509b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (const ReferenceType *DeducedARef = DeducedA->getAs<ReferenceType>()) 2510b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor DeducedA = DeducedARef->getPointeeType(); 2511b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (const ReferenceType *ARef = A->getAs<ReferenceType>()) 2512b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor A = ARef->getPointeeType(); 2513b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2514b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // C++ [temp.deduct.call]p4: 2515b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // [...] However, there are three cases that allow a difference: 2516b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // - If the original P is a reference type, the deduced A (i.e., the 2517b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // type referred to by the reference) can be more cv-qualified than 2518b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // the transformed A. 2519b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (const ReferenceType *OriginalParamRef 2520b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor = OriginalParamType->getAs<ReferenceType>()) { 2521b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // We don't want to keep the reference around any more. 2522b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor OriginalParamType = OriginalParamRef->getPointeeType(); 2523b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2524b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor Qualifiers AQuals = A.getQualifiers(); 2525b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor Qualifiers DeducedAQuals = DeducedA.getQualifiers(); 2526b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor 2527b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor // Under Objective-C++ ARC, the deduced type may have implicitly been 2528b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor // given strong lifetime. If so, update the original qualifiers to 2529b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor // include this strong lifetime. 2530b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor if (S.getLangOpts().ObjCAutoRefCount && 2531b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor DeducedAQuals.getObjCLifetime() == Qualifiers::OCL_Strong && 2532b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor AQuals.getObjCLifetime() == Qualifiers::OCL_None) { 2533b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor AQuals.setObjCLifetime(Qualifiers::OCL_Strong); 2534b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor } 2535b251302dd52249c49ba6527fcd013396deef22cfDouglas Gregor 2536b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (AQuals == DeducedAQuals) { 2537b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // Qualifiers match; there's nothing to do. 2538b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } else if (!DeducedAQuals.compatiblyIncludes(AQuals)) { 2539c99f0ec89fd9782cfafd14d7b1b0a80151eab24aDouglas Gregor return true; 2540b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } else { 2541b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // Qualifiers are compatible, so have the argument type adopt the 2542b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // deduced argument type's qualifiers as if we had performed the 2543b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // qualification conversion. 2544b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor A = Context.getQualifiedType(A.getUnqualifiedType(), DeducedAQuals); 2545b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } 2546b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } 2547b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2548b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // - The transformed A can be another pointer or pointer to member 2549b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // type that can be converted to the deduced A via a qualification 2550b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // conversion. 255118e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth // 255218e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth // Also allow conversions which merely strip [[noreturn]] from function types 255318e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth // (recursively) as an extension. 255418e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth // FIXME: Currently, this doesn't place nicely with qualfication conversions. 2555b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor bool ObjCLifetimeConversion = false; 255618e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth QualType ResultTy; 2557b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if ((A->isAnyPointerType() || A->isMemberPointerType()) && 255818e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth (S.IsQualificationConversion(A, DeducedA, false, 255918e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth ObjCLifetimeConversion) || 256018e0461ad72dcf6ec93cd3b1df7bf1b5a30b10b7Chandler Carruth S.IsNoReturnConversion(A, DeducedA, ResultTy))) 2561b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor return false; 2562b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2563b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2564b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // - If P is a class and P has the form simple-template-id, then the 2565b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // transformed A can be a derived class of the deduced A. [...] 2566b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // [...] Likewise, if P is a pointer to a class of the form 2567b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // simple-template-id, the transformed A can be a pointer to a 2568b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor // derived class pointed to by the deduced A. 2569b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (const PointerType *OriginalParamPtr 2570b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor = OriginalParamType->getAs<PointerType>()) { 2571b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (const PointerType *DeducedAPtr = DeducedA->getAs<PointerType>()) { 2572b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (const PointerType *APtr = A->getAs<PointerType>()) { 2573b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (A->getPointeeType()->isRecordType()) { 2574b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor OriginalParamType = OriginalParamPtr->getPointeeType(); 2575b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor DeducedA = DeducedAPtr->getPointeeType(); 2576b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor A = APtr->getPointeeType(); 2577b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } 2578b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } 2579b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } 2580b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor } 2581b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2582b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (Context.hasSameUnqualifiedType(A, DeducedA)) 2583b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor return false; 2584b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2585b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (A->isRecordType() && isSimpleTemplateIdType(OriginalParamType) && 2586b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor S.IsDerivedFrom(A, DeducedA)) 2587b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor return false; 2588b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 2589b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor return true; 2590b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor} 2591b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor 25921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Finish template argument deduction for a function template, 259383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// checking the deduced template arguments for completeness and forming 259483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// the function template specialization. 2595dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor/// 2596dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor/// \param OriginalCallArgs If non-NULL, the original call arguments against 2597dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor/// which the deduced argument types should be compared. 25981eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::TemplateDeductionResult 259983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 26005f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<DeducedTemplateArgument> &Deduced, 260102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor unsigned NumExplicitlySpecified, 260283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *&Specialization, 2603dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor TemplateDeductionInfo &Info, 26045f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs) { 260583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateParameterList *TemplateParams 260683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = FunctionTemplate->getTemplateParameters(); 26071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 260859a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman // Unevaluated SFINAE context. 260959a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman EnterExpressionEvaluationContext Unevaluated(*this, Sema::Unevaluated); 261051ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor SFINAETrap Trap(*this); 261151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 261251ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // Enter a new template instantiation context while we instantiate the 261351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // actual function declaration. 26147e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(), Deduced.end()); 261551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor InstantiatingTemplate Inst(*this, FunctionTemplate->getLocation(), 26167e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith FunctionTemplate, DeducedArgs, 26179b623639378d53a675921ddfa7316034d571881eDouglas Gregor ActiveTemplateInstantiation::DeducedTemplateArgumentSubstitution, 26189b623639378d53a675921ddfa7316034d571881eDouglas Gregor Info); 261951ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (Inst) 262051ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor return TDK_InstantiationDepth; 262151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 262296db310ab7ca59e1890ddef25a3701bc2909d20fJohn McCall ContextRAII SavedContext(*this, FunctionTemplate->getTemplatedDecl()); 2623f5813826802c2e76cdc13cae834ebfd4518d74a6John McCall 262483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // C++ [temp.deduct.type]p2: 262583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // [...] or if any template argument remains neither deduced nor 262683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // explicitly specified, template argument deduction fails. 26275f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<TemplateArgument, 4> Builder; 2628b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor for (unsigned I = 0, N = TemplateParams->size(); I != N; ++I) { 2629b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor NamedDecl *Param = TemplateParams->getParam(I); 2630dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 263151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (!Deduced[I].isNull()) { 26323273b0cea879c7af345d6bf98502bbf73fc4fde1Douglas Gregor if (I < NumExplicitlySpecified) { 263302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // We have already fully type-checked and converted this 2634dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // argument, because it was explicitly-specified. Just record the 26353273b0cea879c7af345d6bf98502bbf73fc4fde1Douglas Gregor // presence of this argument. 2636910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor Builder.push_back(Deduced[I]); 263702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor continue; 263802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 263902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 264002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // We have deduced this argument, so it still needs to be 264102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // checked and converted. 264202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 264302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // First, for a non-type template parameter type that is 264402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // initialized by a declaration, we need the type of the 264502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // corresponding non-type template parameter. 264602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor QualType NTTPType; 2647dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (NonTypeTemplateParmDecl *NTTP 2648dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = dyn_cast<NonTypeTemplateParmDecl>(Param)) { 2649b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor NTTPType = NTTP->getType(); 2650b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor if (NTTPType->isDependentType()) { 2651dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi TemplateArgumentList TemplateArgs(TemplateArgumentList::OnStack, 2652b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor Builder.data(), Builder.size()); 2653b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor NTTPType = SubstType(NTTPType, 2654b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor MultiLevelTemplateArgumentList(TemplateArgs), 2655b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor NTTP->getLocation(), 2656b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor NTTP->getDeclName()); 2657b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor if (NTTPType.isNull()) { 2658b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor Info.Param = makeTemplateParameter(Param); 2659b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor // FIXME: These template arguments are temporary. Free them! 2660dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Info.reset(TemplateArgumentList::CreateCopy(Context, 2661dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Builder.data(), 2662b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor Builder.size())); 2663b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor return TDK_SubstitutionFailure; 266402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 266502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 266602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 266702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 2668b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor if (ConvertDeducedTemplateArgument(*this, Param, Deduced[I], 26696952f1e4256c5b43aee5e98cea4e9b663bd1d413Douglas Gregor FunctionTemplate, NTTPType, 0, Info, 267054c53cca105ed595e12fecf04e415c3712bda936Douglas Gregor true, Builder)) { 2671b9a7d6fb53f2b76df2ef832146a1edb4cb01b9f6Douglas Gregor Info.Param = makeTemplateParameter(Param); 2672910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor // FIXME: These template arguments are temporary. Free them! 2673dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Info.reset(TemplateArgumentList::CreateCopy(Context, Builder.data(), 2674dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Builder.size())); 267502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TDK_SubstitutionFailure; 267602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 267702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 267851ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor continue; 267951ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor } 2680dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2681ea6c96f63a45b4ffdcdf9824a9cf31a32825c0f6Douglas Gregor // C++0x [temp.arg.explicit]p3: 2682dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // A trailing template parameter pack (14.5.3) not otherwise deduced will 2683ea6c96f63a45b4ffdcdf9824a9cf31a32825c0f6Douglas Gregor // be deduced to an empty sequence of template arguments. 2684ea6c96f63a45b4ffdcdf9824a9cf31a32825c0f6Douglas Gregor // FIXME: Where did the word "trailing" come from? 2685ea6c96f63a45b4ffdcdf9824a9cf31a32825c0f6Douglas Gregor if (Param->isTemplateParameterPack()) { 2686d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // We may have had explicitly-specified template arguments for this 2687d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // template parameter pack. If so, our empty deduction extends the 2688d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // explicitly-specified set (C++0x [temp.arg.explicit]p9). 2689d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor const TemplateArgument *ExplicitArgs; 2690d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor unsigned NumExplicitArgs; 2691a8eaf008e92759142982f7b40720b2b2674bd663Richard Smith if (CurrentInstantiationScope && 2692a8eaf008e92759142982f7b40720b2b2674bd663Richard Smith CurrentInstantiationScope->getPartiallySubstitutedPack(&ExplicitArgs, 2693d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor &NumExplicitArgs) 269422eaced5cac3cf0522c953f593419fc6cf184aafDouglas Gregor == Param) { 2695d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor Builder.push_back(TemplateArgument(ExplicitArgs, NumExplicitArgs)); 2696dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 269722eaced5cac3cf0522c953f593419fc6cf184aafDouglas Gregor // Forget the partially-substituted pack; it's substitution is now 269822eaced5cac3cf0522c953f593419fc6cf184aafDouglas Gregor // complete. 269922eaced5cac3cf0522c953f593419fc6cf184aafDouglas Gregor CurrentInstantiationScope->ResetPartiallySubstitutedPack(); 270022eaced5cac3cf0522c953f593419fc6cf184aafDouglas Gregor } else { 270122eaced5cac3cf0522c953f593419fc6cf184aafDouglas Gregor Builder.push_back(TemplateArgument::getEmptyPack()); 270222eaced5cac3cf0522c953f593419fc6cf184aafDouglas Gregor } 2703ea6c96f63a45b4ffdcdf9824a9cf31a32825c0f6Douglas Gregor continue; 2704ea6c96f63a45b4ffdcdf9824a9cf31a32825c0f6Douglas Gregor } 270551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 2706dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // Substitute into the default template argument, if available. 270751ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor TemplateArgumentLoc DefArg 270851ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor = SubstDefaultTemplateArgumentIfAvailable(FunctionTemplate, 270951ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getLocation(), 271051ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getSourceRange().getEnd(), 271151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor Param, 271251ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor Builder); 271351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 271451ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // If there was no default argument, deduction is incomplete. 271551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (DefArg.getArgument().isNull()) { 271683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.Param = makeTemplateParameter( 271751ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor const_cast<NamedDecl *>(TemplateParams->getParam(I))); 271883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_Incomplete; 271983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 2720dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 272151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // Check whether we can actually use the default argument. 272251ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (CheckTemplateArgument(Param, DefArg, 272351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate, 272451ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getLocation(), 272551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getSourceRange().getEnd(), 27266952f1e4256c5b43aee5e98cea4e9b663bd1d413Douglas Gregor 0, Builder, 27278735b294a257a07ca158c28094d7324f0adf889aDouglas Gregor CTAK_Specified)) { 272851ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor Info.Param = makeTemplateParameter( 272951ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor const_cast<NamedDecl *>(TemplateParams->getParam(I))); 2730910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor // FIXME: These template arguments are temporary. Free them! 2731dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Info.reset(TemplateArgumentList::CreateCopy(Context, Builder.data(), 2732910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor Builder.size())); 273351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor return TDK_SubstitutionFailure; 273451ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor } 27351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 273651ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // If we get here, we successfully used the default template argument. 273783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 27381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 273983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Form the template argument list from the deduced template arguments. 27401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateArgumentList *DeducedArgumentList 2741910f8008fea79120489a53593fe971b0b8a4a740Douglas Gregor = TemplateArgumentList::CreateCopy(Context, Builder.data(), Builder.size()); 274283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.reset(DeducedArgumentList); 27431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Substitute the deduced template arguments into the function template 274583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // declaration to produce the function template specialization. 2746d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor DeclContext *Owner = FunctionTemplate->getDeclContext(); 2747d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor if (FunctionTemplate->getFriendObjectKind()) 2748d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor Owner = FunctionTemplate->getLexicalDeclContext(); 274983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Specialization = cast_or_null<FunctionDecl>( 2750d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor SubstDecl(FunctionTemplate->getTemplatedDecl(), Owner, 2751357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor MultiLevelTemplateArgumentList(*DeducedArgumentList))); 27525fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor if (!Specialization || Specialization->isInvalidDecl()) 275383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_SubstitutionFailure; 27541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2755dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi assert(Specialization->getPrimaryTemplate()->getCanonicalDecl() == 2756f882574cf640d5c8355965e1c486f9d8d8ffcf47Douglas Gregor FunctionTemplate->getCanonicalDecl()); 2757dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 27581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If the template argument list is owned by the function template 275983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // specialization, release it. 2760ec20f46740a59758b12c22108002395bcf5b6f9bDouglas Gregor if (Specialization->getTemplateSpecializationArgs() == DeducedArgumentList && 2761ec20f46740a59758b12c22108002395bcf5b6f9bDouglas Gregor !Trap.hasErrorOccurred()) 276283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.take(); 27631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 27645fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor // There may have been an error that did not prevent us from constructing a 27655fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor // declaration. Mark the declaration invalid and return with a substitution 27665fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor // failure. 27675fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor if (Trap.hasErrorOccurred()) { 27685fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor Specialization->setInvalidDecl(true); 27695fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor return TDK_SubstitutionFailure; 27705fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor } 27715fad9b8362c62e230f6603d86ec7d1747e74c737Douglas Gregor 2772dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor if (OriginalCallArgs) { 2773dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor // C++ [temp.deduct.call]p4: 2774dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor // In general, the deduction process attempts to find template argument 2775dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor // values that will make the deduced A identical to A (after the type A 2776dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor // is transformed as described above). [...] 2777dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor for (unsigned I = 0, N = OriginalCallArgs->size(); I != N; ++I) { 2778dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor OriginalCallArg OriginalArg = (*OriginalCallArgs)[I]; 2779dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor unsigned ParamIdx = OriginalArg.ArgIdx; 2780dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 2781dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor if (ParamIdx >= Specialization->getNumParams()) 2782dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor continue; 2783dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 2784dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor QualType DeducedA = Specialization->getParamDecl(ParamIdx)->getType(); 2785b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor if (CheckOriginalCallArgDeduction(*this, OriginalArg, DeducedA)) 2786b7edc4f372f1abe6c422ea711a99f9906a7464daDouglas Gregor return Sema::TDK_SubstitutionFailure; 2787dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor } 2788dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor } 2789dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 27909b623639378d53a675921ddfa7316034d571881eDouglas Gregor // If we suppressed any diagnostics while performing template argument 27919b623639378d53a675921ddfa7316034d571881eDouglas Gregor // deduction, and if we haven't already instantiated this declaration, 27929b623639378d53a675921ddfa7316034d571881eDouglas Gregor // keep track of these diagnostics. They'll be emitted if this specialization 27939b623639378d53a675921ddfa7316034d571881eDouglas Gregor // is actually used. 27949b623639378d53a675921ddfa7316034d571881eDouglas Gregor if (Info.diag_begin() != Info.diag_end()) { 27955f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> >::iterator 27969b623639378d53a675921ddfa7316034d571881eDouglas Gregor Pos = SuppressedDiagnostics.find(Specialization->getCanonicalDecl()); 27979b623639378d53a675921ddfa7316034d571881eDouglas Gregor if (Pos == SuppressedDiagnostics.end()) 27989b623639378d53a675921ddfa7316034d571881eDouglas Gregor SuppressedDiagnostics[Specialization->getCanonicalDecl()] 27999b623639378d53a675921ddfa7316034d571881eDouglas Gregor .append(Info.diag_begin(), Info.diag_end()); 2800dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi } 28019b623639378d53a675921ddfa7316034d571881eDouglas Gregor 28021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return TDK_Success; 280383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor} 280483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 28059c72c6088d591ace8503b842d39448c2040f3033John McCall/// Gets the type of a function for template-argument-deducton 28069c72c6088d591ace8503b842d39448c2040f3033John McCall/// purposes when it's considered as part of an overload set. 2807eff92135d32039c9874dc356f3e93143af6069c1John McCallstatic QualType GetTypeOfFunction(ASTContext &Context, 28089c72c6088d591ace8503b842d39448c2040f3033John McCall const OverloadExpr::FindResult &R, 2809eff92135d32039c9874dc356f3e93143af6069c1John McCall FunctionDecl *Fn) { 2810eff92135d32039c9874dc356f3e93143af6069c1John McCall if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Fn)) 28119c72c6088d591ace8503b842d39448c2040f3033John McCall if (Method->isInstance()) { 28129c72c6088d591ace8503b842d39448c2040f3033John McCall // An instance method that's referenced in a form that doesn't 28139c72c6088d591ace8503b842d39448c2040f3033John McCall // look like a member pointer is just invalid. 28149c72c6088d591ace8503b842d39448c2040f3033John McCall if (!R.HasFormOfMemberPointer) return QualType(); 28159c72c6088d591ace8503b842d39448c2040f3033John McCall 2816eff92135d32039c9874dc356f3e93143af6069c1John McCall return Context.getMemberPointerType(Fn->getType(), 2817eff92135d32039c9874dc356f3e93143af6069c1John McCall Context.getTypeDeclType(Method->getParent()).getTypePtr()); 28189c72c6088d591ace8503b842d39448c2040f3033John McCall } 28199c72c6088d591ace8503b842d39448c2040f3033John McCall 28209c72c6088d591ace8503b842d39448c2040f3033John McCall if (!R.IsAddressOfOperand) return Fn->getType(); 2821eff92135d32039c9874dc356f3e93143af6069c1John McCall return Context.getPointerType(Fn->getType()); 2822eff92135d32039c9874dc356f3e93143af6069c1John McCall} 2823eff92135d32039c9874dc356f3e93143af6069c1John McCall 2824eff92135d32039c9874dc356f3e93143af6069c1John McCall/// Apply the deduction rules for overload sets. 2825eff92135d32039c9874dc356f3e93143af6069c1John McCall/// 2826eff92135d32039c9874dc356f3e93143af6069c1John McCall/// \return the null type if this argument should be treated as an 2827eff92135d32039c9874dc356f3e93143af6069c1John McCall/// undeduced context 2828eff92135d32039c9874dc356f3e93143af6069c1John McCallstatic QualType 2829eff92135d32039c9874dc356f3e93143af6069c1John McCallResolveOverloadForDeduction(Sema &S, TemplateParameterList *TemplateParams, 283075f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor Expr *Arg, QualType ParamType, 283175f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor bool ParamWasReference) { 2832dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 28339c72c6088d591ace8503b842d39448c2040f3033John McCall OverloadExpr::FindResult R = OverloadExpr::find(Arg); 2834eff92135d32039c9874dc356f3e93143af6069c1John McCall 28359c72c6088d591ace8503b842d39448c2040f3033John McCall OverloadExpr *Ovl = R.Expression; 2836eff92135d32039c9874dc356f3e93143af6069c1John McCall 283775f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor // C++0x [temp.deduct.call]p4 283875f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor unsigned TDF = 0; 283975f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor if (ParamWasReference) 284075f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor TDF |= TDF_ParamWithReferenceType; 284175f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor if (R.IsAddressOfOperand) 284275f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor TDF |= TDF_IgnoreQualifiers; 284375f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor 2844eff92135d32039c9874dc356f3e93143af6069c1John McCall // C++0x [temp.deduct.call]p6: 2845eff92135d32039c9874dc356f3e93143af6069c1John McCall // When P is a function type, pointer to function type, or pointer 2846eff92135d32039c9874dc356f3e93143af6069c1John McCall // to member function type: 2847eff92135d32039c9874dc356f3e93143af6069c1John McCall 2848eff92135d32039c9874dc356f3e93143af6069c1John McCall if (!ParamType->isFunctionType() && 2849eff92135d32039c9874dc356f3e93143af6069c1John McCall !ParamType->isFunctionPointerType() && 2850860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor !ParamType->isMemberFunctionPointerType()) { 2851860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor if (Ovl->hasExplicitTemplateArgs()) { 2852860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor // But we can still look for an explicit specialization. 2853860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor if (FunctionDecl *ExplicitSpec 2854860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor = S.ResolveSingleFunctionTemplateSpecialization(Ovl)) 2855860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor return GetTypeOfFunction(S.Context, R, ExplicitSpec); 2856860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor } 2857eff92135d32039c9874dc356f3e93143af6069c1John McCall 2858860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor return QualType(); 2859860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor } 2860860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor 2861860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor // Gather the explicit template arguments, if any. 2862860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor TemplateArgumentListInfo ExplicitTemplateArgs; 2863860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor if (Ovl->hasExplicitTemplateArgs()) 2864860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor Ovl->getExplicitTemplateArgs().copyInto(ExplicitTemplateArgs); 2865eff92135d32039c9874dc356f3e93143af6069c1John McCall QualType Match; 28667bb12da2b0749eeebb21854c77877736969e59f2John McCall for (UnresolvedSetIterator I = Ovl->decls_begin(), 28677bb12da2b0749eeebb21854c77877736969e59f2John McCall E = Ovl->decls_end(); I != E; ++I) { 2868eff92135d32039c9874dc356f3e93143af6069c1John McCall NamedDecl *D = (*I)->getUnderlyingDecl(); 2869eff92135d32039c9874dc356f3e93143af6069c1John McCall 2870860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor if (FunctionTemplateDecl *FunTmpl = dyn_cast<FunctionTemplateDecl>(D)) { 2871860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor // - If the argument is an overload set containing one or more 2872860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor // function templates, the parameter is treated as a 2873860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor // non-deduced context. 2874860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor if (!Ovl->hasExplicitTemplateArgs()) 2875860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor return QualType(); 2876860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor 2877860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor // Otherwise, see if we can resolve a function type 2878860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor FunctionDecl *Specialization = 0; 287993e4599196654907dad3bd476013ad05d36ce604Craig Topper TemplateDeductionInfo Info(Ovl->getNameLoc()); 2880860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor if (S.DeduceTemplateArguments(FunTmpl, &ExplicitTemplateArgs, 2881860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor Specialization, Info)) 2882860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor continue; 2883860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor 2884860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor D = Specialization; 2885860d9b780b54f56cd27e16620196d213385d31f7Douglas Gregor } 2886eff92135d32039c9874dc356f3e93143af6069c1John McCall 2887eff92135d32039c9874dc356f3e93143af6069c1John McCall FunctionDecl *Fn = cast<FunctionDecl>(D); 28889c72c6088d591ace8503b842d39448c2040f3033John McCall QualType ArgType = GetTypeOfFunction(S.Context, R, Fn); 28899c72c6088d591ace8503b842d39448c2040f3033John McCall if (ArgType.isNull()) continue; 2890eff92135d32039c9874dc356f3e93143af6069c1John McCall 289175f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor // Function-to-pointer conversion. 2892dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (!ParamWasReference && ParamType->isPointerType() && 289375f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor ArgType->isFunctionType()) 289475f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor ArgType = S.Context.getPointerType(ArgType); 2895dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2896eff92135d32039c9874dc356f3e93143af6069c1John McCall // - If the argument is an overload set (not containing function 2897eff92135d32039c9874dc356f3e93143af6069c1John McCall // templates), trial argument deduction is attempted using each 2898eff92135d32039c9874dc356f3e93143af6069c1John McCall // of the members of the set. If deduction succeeds for only one 2899eff92135d32039c9874dc356f3e93143af6069c1John McCall // of the overload set members, that member is used as the 2900eff92135d32039c9874dc356f3e93143af6069c1John McCall // argument value for the deduction. If deduction succeeds for 2901eff92135d32039c9874dc356f3e93143af6069c1John McCall // more than one member of the overload set the parameter is 2902eff92135d32039c9874dc356f3e93143af6069c1John McCall // treated as a non-deduced context. 2903eff92135d32039c9874dc356f3e93143af6069c1John McCall 2904eff92135d32039c9874dc356f3e93143af6069c1John McCall // We do all of this in a fresh context per C++0x [temp.deduct.type]p2: 2905eff92135d32039c9874dc356f3e93143af6069c1John McCall // Type deduction is done independently for each P/A pair, and 2906eff92135d32039c9874dc356f3e93143af6069c1John McCall // the deduced template argument values are then combined. 2907eff92135d32039c9874dc356f3e93143af6069c1John McCall // So we do not reject deductions which were made elsewhere. 29085f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 8> 290902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Deduced(TemplateParams->size()); 291093e4599196654907dad3bd476013ad05d36ce604Craig Topper TemplateDeductionInfo Info(Ovl->getNameLoc()); 2911eff92135d32039c9874dc356f3e93143af6069c1John McCall Sema::TemplateDeductionResult Result 2912bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, ParamType, 2913bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ArgType, Info, Deduced, TDF); 2914eff92135d32039c9874dc356f3e93143af6069c1John McCall if (Result) continue; 2915eff92135d32039c9874dc356f3e93143af6069c1John McCall if (!Match.isNull()) return QualType(); 2916eff92135d32039c9874dc356f3e93143af6069c1John McCall Match = ArgType; 2917eff92135d32039c9874dc356f3e93143af6069c1John McCall } 2918eff92135d32039c9874dc356f3e93143af6069c1John McCall 2919eff92135d32039c9874dc356f3e93143af6069c1John McCall return Match; 2920eff92135d32039c9874dc356f3e93143af6069c1John McCall} 2921eff92135d32039c9874dc356f3e93143af6069c1John McCall 2922dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief Perform the adjustments to the parameter and argument types 2923f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor/// described in C++ [temp.deduct.call]. 2924f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor/// 2925f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor/// \returns true if the caller should not attempt to perform any template 29260efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith/// argument deduction based on this P/A pair because the argument is an 29270efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith/// overloaded function set that could not be resolved. 2928f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregorstatic bool AdjustFunctionParmAndArgTypesForDeduction(Sema &S, 2929f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor TemplateParameterList *TemplateParams, 2930f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor QualType &ParamType, 2931f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor QualType &ArgType, 2932f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor Expr *Arg, 2933f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor unsigned &TDF) { 2934f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // C++0x [temp.deduct.call]p3: 29350099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // If P is a cv-qualified type, the top level cv-qualifiers of P's type 2936f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // are ignored for type deduction. 2937a459cc26f6c895ae48742a36203f753cea8b3e91Douglas Gregor if (ParamType.hasQualifiers()) 2938a459cc26f6c895ae48742a36203f753cea8b3e91Douglas Gregor ParamType = ParamType.getUnqualifiedType(); 2939f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor const ReferenceType *ParamRefType = ParamType->getAs<ReferenceType>(); 2940f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ParamRefType) { 294134b41d939a1328f484511c6002ba2456db879a29Richard Smith QualType PointeeType = ParamRefType->getPointeeType(); 294234b41d939a1328f484511c6002ba2456db879a29Richard Smith 29430efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith // If the argument has incomplete array type, try to complete its type. 2944d10099e5c8238fa0327f03921cf2e3c8975c881eDouglas Gregor if (ArgType->isIncompleteArrayType() && !S.RequireCompleteExprType(Arg, 0)) 2945f15748a28c8443eef2924ef83689c358c661e9c5Douglas Gregor ArgType = Arg->getType(); 2946f15748a28c8443eef2924ef83689c358c661e9c5Douglas Gregor 29472ad746aeb90e86cea7afaf552a02ae3f3b5ec859Douglas Gregor // [C++0x] If P is an rvalue reference to a cv-unqualified 29482ad746aeb90e86cea7afaf552a02ae3f3b5ec859Douglas Gregor // template parameter and the argument is an lvalue, the type 29492ad746aeb90e86cea7afaf552a02ae3f3b5ec859Douglas Gregor // "lvalue reference to A" is used in place of A for type 29502ad746aeb90e86cea7afaf552a02ae3f3b5ec859Douglas Gregor // deduction. 295134b41d939a1328f484511c6002ba2456db879a29Richard Smith if (isa<RValueReferenceType>(ParamType)) { 295234b41d939a1328f484511c6002ba2456db879a29Richard Smith if (!PointeeType.getQualifiers() && 295334b41d939a1328f484511c6002ba2456db879a29Richard Smith isa<TemplateTypeParmType>(PointeeType) && 29549625e44c0252485277a340746ed8ac950686156fDouglas Gregor Arg->Classify(S.Context).isLValue() && 29559625e44c0252485277a340746ed8ac950686156fDouglas Gregor Arg->getType() != S.Context.OverloadTy && 29569625e44c0252485277a340746ed8ac950686156fDouglas Gregor Arg->getType() != S.Context.BoundMemberTy) 29572ad746aeb90e86cea7afaf552a02ae3f3b5ec859Douglas Gregor ArgType = S.Context.getLValueReferenceType(ArgType); 29582ad746aeb90e86cea7afaf552a02ae3f3b5ec859Douglas Gregor } 29592ad746aeb90e86cea7afaf552a02ae3f3b5ec859Douglas Gregor 2960f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // [...] If P is a reference type, the type referred to by P is used 2961f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // for type deduction. 296234b41d939a1328f484511c6002ba2456db879a29Richard Smith ParamType = PointeeType; 2963f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 2964dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2965f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // Overload sets usually make this parameter an undeduced 2966f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // context, but there are sometimes special circumstances. 2967f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ArgType == S.Context.OverloadTy) { 2968f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ArgType = ResolveOverloadForDeduction(S, TemplateParams, 2969f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor Arg, ParamType, 2970f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ParamRefType != 0); 2971f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ArgType.isNull()) 2972f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor return true; 2973f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 2974dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 2975f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ParamRefType) { 2976f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // C++0x [temp.deduct.call]p3: 2977f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // [...] If P is of the form T&&, where T is a template parameter, and 2978f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // the argument is an lvalue, the type A& is used in place of A for 2979f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // type deduction. 2980f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ParamRefType->isRValueReferenceType() && 2981f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ParamRefType->getAs<TemplateTypeParmType>() && 2982f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor Arg->isLValue()) 2983f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ArgType = S.Context.getLValueReferenceType(ArgType); 2984f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } else { 2985f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // C++ [temp.deduct.call]p2: 2986f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // If P is not a reference type: 2987f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // - If A is an array type, the pointer type produced by the 2988f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // array-to-pointer standard conversion (4.2) is used in place of 2989f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // A for type deduction; otherwise, 2990f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ArgType->isArrayType()) 2991f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ArgType = S.Context.getArrayDecayedType(ArgType); 2992f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // - If A is a function type, the pointer type produced by the 2993f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // function-to-pointer standard conversion (4.3) is used in place 2994f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // of A for type deduction; otherwise, 2995f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor else if (ArgType->isFunctionType()) 2996f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ArgType = S.Context.getPointerType(ArgType); 2997f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor else { 29980099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // - If A is a cv-qualified type, the top level cv-qualifiers of A's 2999f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // type are ignored for type deduction. 3000a459cc26f6c895ae48742a36203f753cea8b3e91Douglas Gregor ArgType = ArgType.getUnqualifiedType(); 3001f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 3002f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 3003dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3004f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // C++0x [temp.deduct.call]p4: 3005f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // In general, the deduction process attempts to find template argument 3006f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // values that will make the deduced A identical to A (after the type A 3007f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // is transformed as described above). [...] 3008f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor TDF = TDF_SkipNonDependent; 3009dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3010f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // - If the original P is a reference type, the deduced A (i.e., the 3011f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // type referred to by the reference) can be more cv-qualified than 3012f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // the transformed A. 3013f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ParamRefType) 3014f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor TDF |= TDF_ParamWithReferenceType; 3015f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // - The transformed A can be another pointer or pointer to member 3016f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // type that can be converted to the deduced A via a qualification 3017f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // conversion (4.4). 3018f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ArgType->isPointerType() || ArgType->isMemberPointerType() || 3019f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ArgType->isObjCObjectPointerType()) 3020f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor TDF |= TDF_IgnoreQualifiers; 3021f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // - If P is a class and P has the form simple-template-id, then the 3022f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // transformed A can be a derived class of the deduced A. Likewise, 3023f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // if P is a pointer to a class of the form simple-template-id, the 3024f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // transformed A can be a pointer to a derived class pointed to by 3025f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // the deduced A. 3026f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (isSimpleTemplateIdType(ParamType) || 3027f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor (isa<PointerType>(ParamType) && 3028f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor isSimpleTemplateIdType( 3029f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ParamType->getAs<PointerType>()->getPointeeType()))) 3030f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor TDF |= TDF_DerivedClass; 3031dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3032f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor return false; 3033f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor} 3034f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor 3035dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregorstatic bool hasDeducibleTemplateParameters(Sema &S, 3036dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor FunctionTemplateDecl *FunctionTemplate, 3037dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor QualType T); 3038dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 30394b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl/// \brief Perform template argument deduction by matching a parameter type 30404b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl/// against a single expression, where the expression is an element of 30410efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith/// an initializer list that was originally matched against a parameter 30420efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith/// of type \c initializer_list\<ParamType\>. 30434b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redlstatic Sema::TemplateDeductionResult 30444b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian RedlDeduceTemplateArgumentByListElement(Sema &S, 30454b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl TemplateParameterList *TemplateParams, 30464b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl QualType ParamType, Expr *Arg, 30474b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl TemplateDeductionInfo &Info, 30484b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl SmallVectorImpl<DeducedTemplateArgument> &Deduced, 30494b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl unsigned TDF) { 30504b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl // Handle the case where an init list contains another init list as the 30514b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl // element. 30524b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl if (InitListExpr *ILE = dyn_cast<InitListExpr>(Arg)) { 30534b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl QualType X; 30544b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl if (!S.isStdInitializerList(ParamType.getNonReferenceType(), &X)) 30554b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl return Sema::TDK_Success; // Just ignore this expression. 30564b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl 30574b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl // Recurse down into the init list. 30584b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl for (unsigned i = 0, e = ILE->getNumInits(); i < e; ++i) { 30594b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl if (Sema::TemplateDeductionResult Result = 30604b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl DeduceTemplateArgumentByListElement(S, TemplateParams, X, 30614b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl ILE->getInit(i), 30624b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl Info, Deduced, TDF)) 30634b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl return Result; 30644b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl } 30654b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl return Sema::TDK_Success; 30664b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl } 30674b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl 30684b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl // For all other cases, just match by type. 3069d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor QualType ArgType = Arg->getType(); 3070d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor if (AdjustFunctionParmAndArgTypesForDeduction(S, TemplateParams, ParamType, 30710efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith ArgType, Arg, TDF)) { 30720efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith Info.Expression = Arg; 3073d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor return Sema::TDK_FailedOverloadResolution; 30740efa62f2096f28a610ac2ea8d2651448a7ec89c7Richard Smith } 30754b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl return DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, ParamType, 3076d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor ArgType, Info, Deduced, TDF); 30774b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl} 30784b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl 3079e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \brief Perform template argument deduction from a function call 3080e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// (C++ [temp.deduct.call]). 3081e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 3082e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param FunctionTemplate the function template for which we are performing 3083e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// template argument deduction. 3084e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 308540ae6666dd7a458f2d213370922a38be13f003c4James Dennett/// \param ExplicitTemplateArgs the explicit template arguments provided 308648026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// for this call. 30876db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor/// 3088e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param Args the function call arguments 3089e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 3090e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param Specialization if template argument deduction was successful, 30911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// this will be set to the function template specialization produced by 3092e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// template argument deduction. 3093e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 3094e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param Info the argument will be updated to provide additional information 3095e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// about template argument deduction. 3096e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 3097e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \returns the result of template argument deduction. 3098e53060fa78ad7e98352049f72787bdb7543e2a48Douglas GregorSema::TemplateDeductionResult 3099e53060fa78ad7e98352049f72787bdb7543e2a48Douglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 310067714230a191bc3c01f33378f34f34ef377991a6Douglas Gregor TemplateArgumentListInfo *ExplicitTemplateArgs, 310113a140caba448a66ffcc5ff0d32a87d6e4f4ad3fAhmed Charles llvm::ArrayRef<Expr *> Args, 3102e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor FunctionDecl *&Specialization, 3103e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor TemplateDeductionInfo &Info) { 3104ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor if (FunctionTemplate->isInvalidDecl()) 3105ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor return TDK_Invalid; 3106ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor 3107e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 31086db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor 3109e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // C++ [temp.deduct.call]p1: 3110e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // Template argument deduction is done by comparing each function template 3111e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // parameter type (call it P) with the type of the corresponding argument 3112e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // of the call (call it A) as described below. 311313a140caba448a66ffcc5ff0d32a87d6e4f4ad3fAhmed Charles unsigned CheckArgs = Args.size(); 311413a140caba448a66ffcc5ff0d32a87d6e4f4ad3fAhmed Charles if (Args.size() < Function->getMinRequiredArguments()) 3115e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor return TDK_TooFewArguments; 311613a140caba448a66ffcc5ff0d32a87d6e4f4ad3fAhmed Charles else if (Args.size() > Function->getNumParams()) { 31171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const FunctionProtoType *Proto 3118183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall = Function->getType()->getAs<FunctionProtoType>(); 3119f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (Proto->isTemplateVariadic()) 3120f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor /* Do nothing */; 3121f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor else if (Proto->isVariadic()) 3122f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor CheckArgs = Function->getNumParams(); 3123dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi else 3124e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor return TDK_TooManyArguments; 3125e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 31261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31276db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // The types of the parameters from which we will perform template argument 31286db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // deduction. 31292a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall LocalInstantiationScope InstScope(*this); 3130e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor TemplateParameterList *TemplateParams 3131e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor = FunctionTemplate->getTemplateParameters(); 31325f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> Deduced; 31335f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<QualType, 4> ParamTypes; 313402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor unsigned NumExplicitlySpecified = 0; 3135d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall if (ExplicitTemplateArgs) { 313683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateDeductionResult Result = 313783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor SubstituteExplicitTemplateArguments(FunctionTemplate, 3138d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall *ExplicitTemplateArgs, 313983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Deduced, 314083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ParamTypes, 314183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 0, 314283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info); 314383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (Result) 314483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return Result; 314502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 314602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NumExplicitlySpecified = Deduced.size(); 31476db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor } else { 31486db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // Just fill in the parameter types from the function declaration. 3149f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor for (unsigned I = 0, N = Function->getNumParams(); I != N; ++I) 31506db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor ParamTypes.push_back(Function->getParamDecl(I)->getType()); 31516db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor } 31521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 31536db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // Deduce template arguments from the function parameters. 31541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Deduced.resize(TemplateParams->size()); 3155f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor unsigned ArgIdx = 0; 31565f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<OriginalCallArg, 4> OriginalCallArgs; 3157dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi for (unsigned ParamIdx = 0, NumParams = ParamTypes.size(); 3158f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ParamIdx != NumParams; ++ParamIdx) { 3159dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor QualType OrigParamType = ParamTypes[ParamIdx]; 3160dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor QualType ParamType = OrigParamType; 3161dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 3162dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi const PackExpansionType *ParamExpansion 3163f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor = dyn_cast<PackExpansionType>(ParamType); 3164f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (!ParamExpansion) { 3165f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // Simple case: matching a function parameter to a function argument. 3166f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (ArgIdx >= CheckArgs) 3167f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor break; 3168dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3169f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor Expr *Arg = Args[ArgIdx++]; 3170f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor QualType ArgType = Arg->getType(); 3171dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 3172f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor unsigned TDF = 0; 3173f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (AdjustFunctionParmAndArgTypesForDeduction(*this, TemplateParams, 3174f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ParamType, ArgType, Arg, 3175f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor TDF)) 3176f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor continue; 3177dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3178d8f5b333f96b4e8018ff3a0d0db62d9e78eb6bddDouglas Gregor // If we have nothing to deduce, we're done. 3179d8f5b333f96b4e8018ff3a0d0db62d9e78eb6bddDouglas Gregor if (!hasDeducibleTemplateParameters(*this, FunctionTemplate, ParamType)) 3180d8f5b333f96b4e8018ff3a0d0db62d9e78eb6bddDouglas Gregor continue; 3181d8f5b333f96b4e8018ff3a0d0db62d9e78eb6bddDouglas Gregor 318284760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // If the argument is an initializer list ... 318384760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (InitListExpr *ILE = dyn_cast<InitListExpr>(Arg)) { 318484760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // ... then the parameter is an undeduced context, unless the parameter 318584760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // type is (reference to cv) std::initializer_list<P'>, in which case 318684760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // deduction is done for each element of the initializer list, and the 318784760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // result is the deduced type if it's the same for all elements. 318884760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl QualType X; 318984760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // Removing references was already done. 319084760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (!isStdInitializerList(ParamType, &X)) 319184760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl continue; 319284760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl 319384760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl for (unsigned i = 0, e = ILE->getNumInits(); i < e; ++i) { 319484760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (TemplateDeductionResult Result = 31954b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl DeduceTemplateArgumentByListElement(*this, TemplateParams, X, 31964b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl ILE->getInit(i), 31974b911e6536ed77524c3cef572cb0f6c8d9079e2eSebastian Redl Info, Deduced, TDF)) 319884760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl return Result; 319984760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl } 320084760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // Don't track the argument type, since an initializer list has none. 320184760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl continue; 320284760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl } 320384760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl 3204dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor // Keep track of the argument type and corresponding parameter index, 3205dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor // so we can check for compatibility between the deduced A and A. 3206d8f5b333f96b4e8018ff3a0d0db62d9e78eb6bddDouglas Gregor OriginalCallArgs.push_back(OriginalCallArg(OrigParamType, ArgIdx-1, 3207d8f5b333f96b4e8018ff3a0d0db62d9e78eb6bddDouglas Gregor ArgType)); 3208dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 3209f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (TemplateDeductionResult Result 3210bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(*this, TemplateParams, 3211bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl ParamType, ArgType, 3212bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF)) 3213f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor return Result; 32141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3215f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor continue; 321675f21af57f3dce1577d6c27bbe7bb45b49ced732Douglas Gregor } 3217dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3218f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // C++0x [temp.deduct.call]p1: 3219dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // For a function parameter pack that occurs at the end of the 3220dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter-declaration-list, the type A of each remaining argument of 3221dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // the call is compared with the type P of the declarator-id of the 3222dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // function parameter pack. Each comparison deduces template arguments 3223dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // for subsequent positions in the template parameter packs expanded by 32247d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor // the function parameter pack. For a function parameter pack that does 3225dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // not occur at the end of the parameter-declaration-list, the type of 32267d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor // the parameter pack is a non-deduced context. 32277d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor if (ParamIdx + 1 < NumParams) 32287d5c0c1273bdc1cb3dff1cb5a62d07b1439e82c7Douglas Gregor break; 3229dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3230f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor QualType ParamPattern = ParamExpansion->getPattern(); 32315f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<unsigned, 2> PackIndices; 3232f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor { 3233013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector SawIndices(TemplateParams->size()); 32345f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<UnexpandedParameterPack, 2> Unexpanded; 3235f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor collectUnexpandedParameterPacks(ParamPattern, Unexpanded); 3236f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor for (unsigned I = 0, N = Unexpanded.size(); I != N; ++I) { 3237f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor unsigned Depth, Index; 3238f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor llvm::tie(Depth, Index) = getDepthAndIndex(Unexpanded[I]); 3239f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (Depth == 0 && !SawIndices[Index]) { 3240f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor SawIndices[Index] = true; 3241f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor PackIndices.push_back(Index); 3242f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 3243f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 3244f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 3245f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor assert(!PackIndices.empty() && "Pack expansion without unexpanded packs?"); 3246dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3247d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // Keep track of the deduced template arguments for each parameter pack 3248dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // expanded by this pack expansion (the outer index) and for each 3249d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor // template argument (the inner SmallVectors). 32505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<SmallVector<DeducedTemplateArgument, 4>, 2> 3251d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor NewlyDeducedPacks(PackIndices.size()); 32525f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 2> 3253d3731198193eee92796ddeb493973b7a598b003eDouglas Gregor SavedPacks(PackIndices.size()); 32545429385919a2b6fb3708635b967221705f4b1dafDouglas Gregor PrepareArgumentPackDeduction(*this, Deduced, PackIndices, SavedPacks, 3255dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi NewlyDeducedPacks); 3256f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor bool HasAnyArguments = false; 325713a140caba448a66ffcc5ff0d32a87d6e4f4ad3fAhmed Charles for (; ArgIdx < Args.size(); ++ArgIdx) { 3258f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor HasAnyArguments = true; 3259dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3260dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor QualType OrigParamType = ParamPattern; 3261dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor ParamType = OrigParamType; 3262f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor Expr *Arg = Args[ArgIdx]; 3263f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor QualType ArgType = Arg->getType(); 3264dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 3265f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor unsigned TDF = 0; 3266f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (AdjustFunctionParmAndArgTypesForDeduction(*this, TemplateParams, 3267f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ParamType, ArgType, Arg, 3268f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor TDF)) { 3269f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // We can't actually perform any deduction for this argument, so stop 3270f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // deduction at this point. 3271f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor ++ArgIdx; 3272f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor break; 3273f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 3274dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 327584760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // As above, initializer lists need special handling. 327684760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (InitListExpr *ILE = dyn_cast<InitListExpr>(Arg)) { 327784760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl QualType X; 327884760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (!isStdInitializerList(ParamType, &X)) { 327984760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl ++ArgIdx; 328084760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl break; 328184760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl } 3282dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 328384760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl for (unsigned i = 0, e = ILE->getNumInits(); i < e; ++i) { 328484760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (TemplateDeductionResult Result = 328584760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl DeduceTemplateArgumentsByTypeMatch(*this, TemplateParams, X, 328684760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl ILE->getInit(i)->getType(), 328784760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl Info, Deduced, TDF)) 328884760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl return Result; 328984760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl } 329084760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl } else { 329184760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl 329284760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // Keep track of the argument type and corresponding argument index, 329384760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl // so we can check for compatibility between the deduced A and A. 329484760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (hasDeducibleTemplateParameters(*this, FunctionTemplate, ParamType)) 329584760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl OriginalCallArgs.push_back(OriginalCallArg(OrigParamType, ArgIdx, 329684760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl ArgType)); 329784760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl 329884760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl if (TemplateDeductionResult Result 329984760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(*this, TemplateParams, 330084760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl ParamType, ArgType, Info, 330184760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl Deduced, TDF)) 330284760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl return Result; 330384760e3a5d885ab19b5d11aafe78dfdfe2911e3aSebastian Redl } 3304eff92135d32039c9874dc356f3e93143af6069c1John McCall 3305f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // Capture the deduced template arguments for each parameter pack expanded 3306f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // by this pack expansion, add them to the list of arguments we've deduced 3307f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // for that pack, then clear out the deduced argument. 3308f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor for (unsigned I = 0, N = PackIndices.size(); I != N; ++I) { 3309f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor DeducedTemplateArgument &DeducedArg = Deduced[PackIndices[I]]; 3310f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor if (!DeducedArg.isNull()) { 3311f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor NewlyDeducedPacks[I].push_back(DeducedArg); 3312f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor DeducedArg = DeducedTemplateArgument(); 3313f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor } 3314e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 3315e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 3316dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3317f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // Build argument packs for each of the parameter packs expanded by this 3318f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // pack expansion. 33190216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor if (Sema::TemplateDeductionResult Result 3320dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = FinishArgumentPackDeduction(*this, TemplateParams, HasAnyArguments, 33210216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor Deduced, PackIndices, SavedPacks, 33220216f8121df32b320cab659d5b703fee50cdfda5Douglas Gregor NewlyDeducedPacks, Info)) 3323dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi return Result; 33241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3325f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor // After we've matching against a parameter pack, we're done. 3326f5c65ffbd7374b6c8d9f1e361041578640cab320Douglas Gregor break; 3327e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 332865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 33291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return FinishTemplateArgumentDeduction(FunctionTemplate, Deduced, 333002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NumExplicitlySpecified, 3331dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor Specialization, Info, &OriginalCallArgs); 333283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor} 3333127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor 333483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \brief Deduce template arguments when taking the address of a function 33354b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// template (C++ [temp.deduct.funcaddr]) or matching a specialization to 33364b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// a template. 333783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 333883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param FunctionTemplate the function template for which we are performing 333983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// template argument deduction. 334083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 334140ae6666dd7a458f2d213370922a38be13f003c4James Dennett/// \param ExplicitTemplateArgs the explicitly-specified template 33424b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// arguments. 334383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 334483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param ArgFunctionType the function type that will be used as the 334583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// "argument" type (A) when performing template argument deduction from the 33464b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// function template's function type. This type may be NULL, if there is no 33474b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// argument type to compare against, in C++0x [temp.arg.explicit]p3. 334883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 334983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param Specialization if template argument deduction was successful, 33501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// this will be set to the function template specialization produced by 335183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// template argument deduction. 335283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 335383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param Info the argument will be updated to provide additional information 335483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// about template argument deduction. 335583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 335683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \returns the result of template argument deduction. 335783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::TemplateDeductionResult 335883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 335967714230a191bc3c01f33378f34f34ef377991a6Douglas Gregor TemplateArgumentListInfo *ExplicitTemplateArgs, 336083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor QualType ArgFunctionType, 336183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *&Specialization, 3362092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor TemplateDeductionInfo &Info, 3363092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor bool InOverloadResolution) { 3364ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor if (FunctionTemplate->isInvalidDecl()) 3365ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor return TDK_Invalid; 3366ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor 336783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 336883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateParameterList *TemplateParams 336983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = FunctionTemplate->getTemplateParameters(); 337083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor QualType FunctionType = Function->getType(); 33711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 337283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Substitute any explicit template arguments. 33732a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall LocalInstantiationScope InstScope(*this); 33745f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> Deduced; 337502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor unsigned NumExplicitlySpecified = 0; 33765f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<QualType, 4> ParamTypes; 3377d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall if (ExplicitTemplateArgs) { 33781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (TemplateDeductionResult Result 33791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump = SubstituteExplicitTemplateArguments(FunctionTemplate, 3380d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall *ExplicitTemplateArgs, 33811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Deduced, ParamTypes, 338283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor &FunctionType, Info)) 338383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return Result; 338402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 338502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NumExplicitlySpecified = Deduced.size(); 3386127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor } 338783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 338859a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman // Unevaluated SFINAE context. 338959a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman EnterExpressionEvaluationContext Unevaluated(*this, Sema::Unevaluated); 33901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SFINAETrap Trap(*this); 33911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3392eff92135d32039c9874dc356f3e93143af6069c1John McCall Deduced.resize(TemplateParams->size()); 3393eff92135d32039c9874dc356f3e93143af6069c1John McCall 33944b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor if (!ArgFunctionType.isNull()) { 3395092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor unsigned TDF = TDF_TopLevelParameterTypeList; 3396092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (InOverloadResolution) TDF |= TDF_InOverloadResolution; 33974b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor // Deduce template arguments from the function type. 33984b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor if (TemplateDeductionResult Result 3399bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(*this, TemplateParams, 3400092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor FunctionType, ArgFunctionType, 3401092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor Info, Deduced, TDF)) 34024b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor return Result; 34034b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor } 3404fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor 3405dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (TemplateDeductionResult Result 3406fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor = FinishTemplateArgumentDeduction(FunctionTemplate, Deduced, 3407fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor NumExplicitlySpecified, 3408fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor Specialization, Info)) 3409fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor return Result; 3410fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor 3411fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor // If the requested function type does not match the actual type of the 3412092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor // specialization with respect to arguments of compatible pointer to function 3413092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor // types, template argument deduction fails. 3414092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (!ArgFunctionType.isNull()) { 3415092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor if (InOverloadResolution && !isSameOrCompatibleFunctionType( 3416092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor Context.getCanonicalType(Specialization->getType()), 3417092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor Context.getCanonicalType(ArgFunctionType))) 3418092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor return TDK_MiscellaneousDeductionFailure; 3419092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor else if(!InOverloadResolution && 3420092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor !Context.hasSameType(Specialization->getType(), ArgFunctionType)) 3421092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor return TDK_MiscellaneousDeductionFailure; 3422092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor } 3423fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor 3424fbb6fad63acac2bef36cfa13e0706fa3e2a1ed7dDouglas Gregor return TDK_Success; 3425e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor} 3426e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor 342765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// \brief Deduce template arguments for a templated conversion 342865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// function (C++ [temp.deduct.conv]) and, if successful, produce a 342965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// conversion function template specialization. 343065ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorSema::TemplateDeductionResult 343165ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 343265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType ToType, 343365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor CXXConversionDecl *&Specialization, 343465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TemplateDeductionInfo &Info) { 3435ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor if (FunctionTemplate->isInvalidDecl()) 3436ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor return TDK_Invalid; 3437ae19fbba559d8199d1f2b7154863180b0ae22ac7Douglas Gregor 34381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CXXConversionDecl *Conv 343965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor = cast<CXXConversionDecl>(FunctionTemplate->getTemplatedDecl()); 344065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType FromType = Conv->getConversionType(); 344165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 344265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Canonicalize the types for deduction. 344365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType P = Context.getCanonicalType(FromType); 344465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType A = Context.getCanonicalType(ToType); 344565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 34465453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor // C++0x [temp.deduct.conv]p2: 344765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // If P is a reference type, the type referred to by P is used for 344865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type deduction. 344965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (const ReferenceType *PRef = P->getAs<ReferenceType>()) 345065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = PRef->getPointeeType(); 345165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 34525453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor // C++0x [temp.deduct.conv]p4: 34535453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor // [...] If A is a reference type, the type referred to by A is used 345465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // for type deduction. 345565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (const ReferenceType *ARef = A->getAs<ReferenceType>()) 34565453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor A = ARef->getPointeeType().getUnqualifiedType(); 34575453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor // C++ [temp.deduct.conv]p3: 345865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // 34591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If A is not a reference type: 346065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor else { 346165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor assert(!A->isReferenceType() && "Reference types were handled above"); 346265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 346365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If P is an array type, the pointer type produced by the 34641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // array-to-pointer standard conversion (4.2) is used in place 346565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // of P for type deduction; otherwise, 346665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (P->isArrayType()) 346765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = Context.getArrayDecayedType(P); 346865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If P is a function type, the pointer type produced by the 346965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // function-to-pointer standard conversion (4.3) is used in 347065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // place of P for type deduction; otherwise, 347165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor else if (P->isFunctionType()) 347265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = Context.getPointerType(P); 347365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If P is a cv-qualified type, the top level cv-qualifiers of 34740099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // P's type are ignored for type deduction. 347565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor else 347665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = P.getUnqualifiedType(); 347765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 34785453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor // C++0x [temp.deduct.conv]p4: 34790099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // If A is a cv-qualified type, the top level cv-qualifiers of A's 34805453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor // type are ignored for type deduction. If A is a reference type, the type 34815453d93ab8668f2d9d0bc02182695b02d207e32dDouglas Gregor // referred to by A is used for type deduction. 348265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor A = A.getUnqualifiedType(); 348365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor } 348465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 348559a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman // Unevaluated SFINAE context. 348659a839c5a4eecfeb495fc64224f6a949d1c5b2daEli Friedman EnterExpressionEvaluationContext Unevaluated(*this, Sema::Unevaluated); 34871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SFINAETrap Trap(*this); 348865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 348965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++ [temp.deduct.conv]p1: 349065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Template argument deduction is done by comparing the return 349165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type of the template conversion function (call it P) with the 349265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type that is required as the result of the conversion (call it 349365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // A) as described in 14.8.2.4. 349465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TemplateParameterList *TemplateParams 349565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor = FunctionTemplate->getTemplateParameters(); 34965f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> Deduced; 34971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Deduced.resize(TemplateParams->size()); 349865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 349965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++0x [temp.deduct.conv]p4: 350065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // In general, the deduction process attempts to find template 350165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // argument values that will make the deduced A identical to 350265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // A. However, there are two cases that allow a difference: 350365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor unsigned TDF = 0; 350465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If the original A is a reference type, A can be more 350565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // cv-qualified than the deduced A (i.e., the type referred to 350665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // by the reference) 350765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (ToType->isReferenceType()) 350865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TDF |= TDF_ParamWithReferenceType; 350965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - The deduced A can be another pointer or pointer to member 35100099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // type that can be converted to A via a qualification 351165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // conversion. 351265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // 351365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // (C++0x [temp.deduct.conv]p6 clarifies that this only happens when 351465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // both P and A are pointers or member pointers. In this case, we 351565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // just ignore cv-qualifiers completely). 351665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if ((P->isPointerType() && A->isPointerType()) || 35172cae1e216c12c7574f5ac59cb0844d22bed9401dDouglas Gregor (P->isMemberPointerType() && A->isMemberPointerType())) 351865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TDF |= TDF_IgnoreQualifiers; 351965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (TemplateDeductionResult Result 3520bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl = DeduceTemplateArgumentsByTypeMatch(*this, TemplateParams, 3521bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl P, A, Info, Deduced, TDF)) 352265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return Result; 352365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 352465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Finish template argument deduction. 35252a7fb27913999d132cf9e10e03dc5271faa2e9d3John McCall LocalInstantiationScope InstScope(*this); 352665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor FunctionDecl *Spec = 0; 352765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TemplateDeductionResult Result 3528dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi = FinishTemplateArgumentDeduction(FunctionTemplate, Deduced, 0, Spec, 352902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Info); 353065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor Specialization = cast_or_null<CXXConversionDecl>(Spec); 353165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return Result; 353265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor} 353365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 35344b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \brief Deduce template arguments for a function template when there is 35354b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// nothing to deduce against (C++0x [temp.arg.explicit]p3). 35364b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 35374b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param FunctionTemplate the function template for which we are performing 35384b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// template argument deduction. 35394b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 354040ae6666dd7a458f2d213370922a38be13f003c4James Dennett/// \param ExplicitTemplateArgs the explicitly-specified template 35414b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// arguments. 35424b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 35434b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param Specialization if template argument deduction was successful, 35444b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// this will be set to the function template specialization produced by 35454b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// template argument deduction. 35464b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 35474b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param Info the argument will be updated to provide additional information 35484b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// about template argument deduction. 35494b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 35504b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \returns the result of template argument deduction. 35514b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas GregorSema::TemplateDeductionResult 35524b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 355367714230a191bc3c01f33378f34f34ef377991a6Douglas Gregor TemplateArgumentListInfo *ExplicitTemplateArgs, 35544b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor FunctionDecl *&Specialization, 3555092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor TemplateDeductionInfo &Info, 3556092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor bool InOverloadResolution) { 35574b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor return DeduceTemplateArguments(FunctionTemplate, ExplicitTemplateArgs, 3558092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor QualType(), Specialization, Info, 3559092140a434366007a611c0a1a73fb6a4e8ff7f5eDouglas Gregor InOverloadResolution); 35604b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor} 35614b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor 356234b41d939a1328f484511c6002ba2456db879a29Richard Smithnamespace { 356334b41d939a1328f484511c6002ba2456db879a29Richard Smith /// Substitute the 'auto' type specifier within a type for a given replacement 356434b41d939a1328f484511c6002ba2456db879a29Richard Smith /// type. 356534b41d939a1328f484511c6002ba2456db879a29Richard Smith class SubstituteAutoTransform : 356634b41d939a1328f484511c6002ba2456db879a29Richard Smith public TreeTransform<SubstituteAutoTransform> { 356734b41d939a1328f484511c6002ba2456db879a29Richard Smith QualType Replacement; 356834b41d939a1328f484511c6002ba2456db879a29Richard Smith public: 356934b41d939a1328f484511c6002ba2456db879a29Richard Smith SubstituteAutoTransform(Sema &SemaRef, QualType Replacement) : 357034b41d939a1328f484511c6002ba2456db879a29Richard Smith TreeTransform<SubstituteAutoTransform>(SemaRef), Replacement(Replacement) { 357134b41d939a1328f484511c6002ba2456db879a29Richard Smith } 357234b41d939a1328f484511c6002ba2456db879a29Richard Smith QualType TransformAutoType(TypeLocBuilder &TLB, AutoTypeLoc TL) { 357334b41d939a1328f484511c6002ba2456db879a29Richard Smith // If we're building the type pattern to deduce against, don't wrap the 357434b41d939a1328f484511c6002ba2456db879a29Richard Smith // substituted type in an AutoType. Certain template deduction rules 357534b41d939a1328f484511c6002ba2456db879a29Richard Smith // apply only when a template type parameter appears directly (and not if 357634b41d939a1328f484511c6002ba2456db879a29Richard Smith // the parameter is found through desugaring). For instance: 357734b41d939a1328f484511c6002ba2456db879a29Richard Smith // auto &&lref = lvalue; 357834b41d939a1328f484511c6002ba2456db879a29Richard Smith // must transform into "rvalue reference to T" not "rvalue reference to 357934b41d939a1328f484511c6002ba2456db879a29Richard Smith // auto type deduced as T" in order for [temp.deduct.call]p3 to apply. 358034b41d939a1328f484511c6002ba2456db879a29Richard Smith if (isa<TemplateTypeParmType>(Replacement)) { 358134b41d939a1328f484511c6002ba2456db879a29Richard Smith QualType Result = Replacement; 3582a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith TemplateTypeParmTypeLoc NewTL = 3583a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith TLB.push<TemplateTypeParmTypeLoc>(Result); 358434b41d939a1328f484511c6002ba2456db879a29Richard Smith NewTL.setNameLoc(TL.getNameLoc()); 358534b41d939a1328f484511c6002ba2456db879a29Richard Smith return Result; 358634b41d939a1328f484511c6002ba2456db879a29Richard Smith } else { 3587a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith QualType Result = RebuildAutoType(Replacement, 3588a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith TL.getTypePtr()->isDecltypeAuto()); 358934b41d939a1328f484511c6002ba2456db879a29Richard Smith AutoTypeLoc NewTL = TLB.push<AutoTypeLoc>(Result); 359034b41d939a1328f484511c6002ba2456db879a29Richard Smith NewTL.setNameLoc(TL.getNameLoc()); 359134b41d939a1328f484511c6002ba2456db879a29Richard Smith return Result; 359234b41d939a1328f484511c6002ba2456db879a29Richard Smith } 359334b41d939a1328f484511c6002ba2456db879a29Richard Smith } 3594dfca6f53ab97d28d43e3fa2564209df08f3d282cDouglas Gregor 3595dfca6f53ab97d28d43e3fa2564209df08f3d282cDouglas Gregor ExprResult TransformLambdaExpr(LambdaExpr *E) { 3596dfca6f53ab97d28d43e3fa2564209df08f3d282cDouglas Gregor // Lambdas never need to be transformed. 3597dfca6f53ab97d28d43e3fa2564209df08f3d282cDouglas Gregor return E; 3598dfca6f53ab97d28d43e3fa2564209df08f3d282cDouglas Gregor } 359934b41d939a1328f484511c6002ba2456db879a29Richard Smith }; 36008ad6c8696a23f410398fc126929b107404c59a95Richard Smith 36018ad6c8696a23f410398fc126929b107404c59a95Richard Smith /// Determine whether the specified type (which contains an 'auto' type 36028ad6c8696a23f410398fc126929b107404c59a95Richard Smith /// specifier) is dependent. This is not trivial, because the 'auto' specifier 36038ad6c8696a23f410398fc126929b107404c59a95Richard Smith /// itself claims to be type-dependent. 36048ad6c8696a23f410398fc126929b107404c59a95Richard Smith bool isDependentAutoType(QualType Ty) { 36058ad6c8696a23f410398fc126929b107404c59a95Richard Smith while (1) { 36068ad6c8696a23f410398fc126929b107404c59a95Richard Smith QualType Pointee = Ty->getPointeeType(); 36078ad6c8696a23f410398fc126929b107404c59a95Richard Smith if (!Pointee.isNull()) { 36088ad6c8696a23f410398fc126929b107404c59a95Richard Smith Ty = Pointee; 36098ad6c8696a23f410398fc126929b107404c59a95Richard Smith } else if (const MemberPointerType *MPT = Ty->getAs<MemberPointerType>()){ 36108ad6c8696a23f410398fc126929b107404c59a95Richard Smith if (MPT->getClass()->isDependentType()) 36118ad6c8696a23f410398fc126929b107404c59a95Richard Smith return true; 36128ad6c8696a23f410398fc126929b107404c59a95Richard Smith Ty = MPT->getPointeeType(); 36138ad6c8696a23f410398fc126929b107404c59a95Richard Smith } else if (const FunctionProtoType *FPT = Ty->getAs<FunctionProtoType>()){ 36148ad6c8696a23f410398fc126929b107404c59a95Richard Smith for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(), 36158ad6c8696a23f410398fc126929b107404c59a95Richard Smith E = FPT->arg_type_end(); 36168ad6c8696a23f410398fc126929b107404c59a95Richard Smith I != E; ++I) 36178ad6c8696a23f410398fc126929b107404c59a95Richard Smith if ((*I)->isDependentType()) 36188ad6c8696a23f410398fc126929b107404c59a95Richard Smith return true; 36198ad6c8696a23f410398fc126929b107404c59a95Richard Smith Ty = FPT->getResultType(); 36208ad6c8696a23f410398fc126929b107404c59a95Richard Smith } else if (Ty->isDependentSizedArrayType()) { 36218ad6c8696a23f410398fc126929b107404c59a95Richard Smith return true; 36228ad6c8696a23f410398fc126929b107404c59a95Richard Smith } else if (const ArrayType *AT = Ty->getAsArrayTypeUnsafe()) { 36238ad6c8696a23f410398fc126929b107404c59a95Richard Smith Ty = AT->getElementType(); 36248ad6c8696a23f410398fc126929b107404c59a95Richard Smith } else if (Ty->getAs<DependentSizedExtVectorType>()) { 36258ad6c8696a23f410398fc126929b107404c59a95Richard Smith return true; 36268ad6c8696a23f410398fc126929b107404c59a95Richard Smith } else if (const VectorType *VT = Ty->getAs<VectorType>()) { 36278ad6c8696a23f410398fc126929b107404c59a95Richard Smith Ty = VT->getElementType(); 36288ad6c8696a23f410398fc126929b107404c59a95Richard Smith } else { 36298ad6c8696a23f410398fc126929b107404c59a95Richard Smith break; 36308ad6c8696a23f410398fc126929b107404c59a95Richard Smith } 36318ad6c8696a23f410398fc126929b107404c59a95Richard Smith } 36328ad6c8696a23f410398fc126929b107404c59a95Richard Smith assert(Ty->getAs<AutoType>() && "didn't find 'auto' in auto type"); 36338ad6c8696a23f410398fc126929b107404c59a95Richard Smith return false; 36348ad6c8696a23f410398fc126929b107404c59a95Richard Smith } 363534b41d939a1328f484511c6002ba2456db879a29Richard Smith} 363634b41d939a1328f484511c6002ba2456db879a29Richard Smith 363734b41d939a1328f484511c6002ba2456db879a29Richard Smith/// \brief Deduce the type for an auto type-specifier (C++0x [dcl.spec.auto]p6) 363834b41d939a1328f484511c6002ba2456db879a29Richard Smith/// 363934b41d939a1328f484511c6002ba2456db879a29Richard Smith/// \param Type the type pattern using the auto type-specifier. 364034b41d939a1328f484511c6002ba2456db879a29Richard Smith/// 364134b41d939a1328f484511c6002ba2456db879a29Richard Smith/// \param Init the initializer for the variable whose type is to be deduced. 364234b41d939a1328f484511c6002ba2456db879a29Richard Smith/// 364334b41d939a1328f484511c6002ba2456db879a29Richard Smith/// \param Result if type deduction was successful, this will be set to the 364434b41d939a1328f484511c6002ba2456db879a29Richard Smith/// deduced type. This may still contain undeduced autos if the type is 3645a085da86242c9b8e3466f8cf6f4397e9f248fd20Richard Smith/// dependent. This will be set to null if deduction succeeded, but auto 3646a085da86242c9b8e3466f8cf6f4397e9f248fd20Richard Smith/// substitution failed; the appropriate diagnostic will already have been 3647a085da86242c9b8e3466f8cf6f4397e9f248fd20Richard Smith/// produced in that case. 3648b832f6dea893f25b40500a04781286236281cb20Sebastian RedlSema::DeduceAutoResult 364932509f1e60451d86e9fbc473b6e853ba10b5fd1eJohn McCallSema::DeduceAutoType(TypeSourceInfo *Type, Expr *&Init, 3650a085da86242c9b8e3466f8cf6f4397e9f248fd20Richard Smith TypeSourceInfo *&Result) { 365132509f1e60451d86e9fbc473b6e853ba10b5fd1eJohn McCall if (Init->getType()->isNonOverloadPlaceholderType()) { 365232509f1e60451d86e9fbc473b6e853ba10b5fd1eJohn McCall ExprResult result = CheckPlaceholderExpr(Init); 3653b832f6dea893f25b40500a04781286236281cb20Sebastian Redl if (result.isInvalid()) return DAR_FailedAlreadyDiagnosed; 365432509f1e60451d86e9fbc473b6e853ba10b5fd1eJohn McCall Init = result.take(); 365532509f1e60451d86e9fbc473b6e853ba10b5fd1eJohn McCall } 365632509f1e60451d86e9fbc473b6e853ba10b5fd1eJohn McCall 36578ad6c8696a23f410398fc126929b107404c59a95Richard Smith if (Init->isTypeDependent() || isDependentAutoType(Type->getType())) { 365834b41d939a1328f484511c6002ba2456db879a29Richard Smith Result = Type; 3659b832f6dea893f25b40500a04781286236281cb20Sebastian Redl return DAR_Succeeded; 366034b41d939a1328f484511c6002ba2456db879a29Richard Smith } 366134b41d939a1328f484511c6002ba2456db879a29Richard Smith 3662a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith // If this is a 'decltype(auto)' specifier, do the decltype dance. 3663a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith // Since 'decltype(auto)' can only occur at the top of the type, we 3664a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith // don't need to go digging for it. 3665a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith if (const AutoType *AT = Type->getType()->getAs<AutoType>()) { 3666a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith if (AT->isDecltypeAuto()) { 3667a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith if (isa<InitListExpr>(Init)) { 3668a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith Diag(Init->getLocStart(), diag::err_decltype_auto_initializer_list); 3669a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith return DAR_FailedAlreadyDiagnosed; 3670a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith } 3671a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith 3672a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith QualType Deduced = BuildDecltypeType(Init, Init->getLocStart()); 3673a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith // FIXME: Support a non-canonical deduced type for 'auto'. 3674a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith Deduced = Context.getCanonicalType(Deduced); 3675a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith Result = SubstituteAutoTransform(*this, Deduced).TransformType(Type); 3676a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith return DAR_Succeeded; 3677a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith } 3678a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith } 3679a2c3646c35dd09d21b74826240aa916545b1873fRichard Smith 368034b41d939a1328f484511c6002ba2456db879a29Richard Smith SourceLocation Loc = Init->getExprLoc(); 368134b41d939a1328f484511c6002ba2456db879a29Richard Smith 368234b41d939a1328f484511c6002ba2456db879a29Richard Smith LocalInstantiationScope InstScope(*this); 368334b41d939a1328f484511c6002ba2456db879a29Richard Smith 368434b41d939a1328f484511c6002ba2456db879a29Richard Smith // Build template<class TemplParam> void Func(FuncParam); 36854fb86f8c4585e53c21c847ad3de9e3b2de123cd9Chandler Carruth TemplateTypeParmDecl *TemplParam = 36864fb86f8c4585e53c21c847ad3de9e3b2de123cd9Chandler Carruth TemplateTypeParmDecl::Create(Context, 0, SourceLocation(), Loc, 0, 0, 0, 36874fb86f8c4585e53c21c847ad3de9e3b2de123cd9Chandler Carruth false, false); 36884fb86f8c4585e53c21c847ad3de9e3b2de123cd9Chandler Carruth QualType TemplArg = QualType(TemplParam->getTypeForDecl(), 0); 36894fb86f8c4585e53c21c847ad3de9e3b2de123cd9Chandler Carruth NamedDecl *TemplParamPtr = TemplParam; 3690483b9f3bc05c5409e2c6643f1c9d91e21c8ff9d2Richard Smith FixedSizeTemplateParameterList<1> TemplateParams(Loc, Loc, &TemplParamPtr, 3691483b9f3bc05c5409e2c6643f1c9d91e21c8ff9d2Richard Smith Loc); 3692483b9f3bc05c5409e2c6643f1c9d91e21c8ff9d2Richard Smith 3693a085da86242c9b8e3466f8cf6f4397e9f248fd20Richard Smith TypeSourceInfo *FuncParamInfo = 369434b41d939a1328f484511c6002ba2456db879a29Richard Smith SubstituteAutoTransform(*this, TemplArg).TransformType(Type); 3695a085da86242c9b8e3466f8cf6f4397e9f248fd20Richard Smith assert(FuncParamInfo && "substituting template parameter for 'auto' failed"); 3696a085da86242c9b8e3466f8cf6f4397e9f248fd20Richard Smith QualType FuncParam = FuncParamInfo->getType(); 369734b41d939a1328f484511c6002ba2456db879a29Richard Smith 369834b41d939a1328f484511c6002ba2456db879a29Richard Smith // Deduce type of TemplParam in Func(Init) 36995f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 1> Deduced; 370034b41d939a1328f484511c6002ba2456db879a29Richard Smith Deduced.resize(1); 370134b41d939a1328f484511c6002ba2456db879a29Richard Smith QualType InitType = Init->getType(); 370234b41d939a1328f484511c6002ba2456db879a29Richard Smith unsigned TDF = 0; 370334b41d939a1328f484511c6002ba2456db879a29Richard Smith 370493e4599196654907dad3bd476013ad05d36ce604Craig Topper TemplateDeductionInfo Info(Loc); 370562b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl 37068ad6c8696a23f410398fc126929b107404c59a95Richard Smith InitListExpr *InitList = dyn_cast<InitListExpr>(Init); 370762b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if (InitList) { 370862b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl for (unsigned i = 0, e = InitList->getNumInits(); i < e; ++i) { 37098ad6c8696a23f410398fc126929b107404c59a95Richard Smith if (DeduceTemplateArgumentByListElement(*this, &TemplateParams, 3710d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor TemplArg, 3711d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor InitList->getInit(i), 3712d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor Info, Deduced, TDF)) 3713b832f6dea893f25b40500a04781286236281cb20Sebastian Redl return DAR_Failed; 371462b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl } 371562b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl } else { 3716d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor if (AdjustFunctionParmAndArgTypesForDeduction(*this, &TemplateParams, 3717d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor FuncParam, InitType, Init, 3718d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor TDF)) 3719d280389b42bb55cd8969eae181dc3ff9f05e9aafDouglas Gregor return DAR_Failed; 37208ad6c8696a23f410398fc126929b107404c59a95Richard Smith 372162b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if (DeduceTemplateArgumentsByTypeMatch(*this, &TemplateParams, FuncParam, 372262b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl InitType, Info, Deduced, TDF)) 3723b832f6dea893f25b40500a04781286236281cb20Sebastian Redl return DAR_Failed; 372462b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl } 372534b41d939a1328f484511c6002ba2456db879a29Richard Smith 372670a01898008a90007866f15c4d9d53ba00b0d203Eli Friedman if (Deduced[0].getKind() != TemplateArgument::Type) 3727b832f6dea893f25b40500a04781286236281cb20Sebastian Redl return DAR_Failed; 372862b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl 372970a01898008a90007866f15c4d9d53ba00b0d203Eli Friedman QualType DeducedType = Deduced[0].getAsType(); 373070a01898008a90007866f15c4d9d53ba00b0d203Eli Friedman 373162b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if (InitList) { 373262b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl DeducedType = BuildStdInitializerList(DeducedType, Loc); 373362b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if (DeducedType.isNull()) 3734b832f6dea893f25b40500a04781286236281cb20Sebastian Redl return DAR_FailedAlreadyDiagnosed; 373562b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl } 373662b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl 373734b41d939a1328f484511c6002ba2456db879a29Richard Smith Result = SubstituteAutoTransform(*this, DeducedType).TransformType(Type); 373862b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl 37399a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor // Check that the deduced argument type is compatible with the original 37409a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor // argument type per C++ [temp.deduct.call]p4. 374162b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if (!InitList && Result && 37429a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor CheckOriginalCallArgDeduction(*this, 37439a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor Sema::OriginalCallArg(FuncParam,0,InitType), 37449a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor Result->getType())) { 37459a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor Result = 0; 3746b832f6dea893f25b40500a04781286236281cb20Sebastian Redl return DAR_Failed; 37479a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor } 37489a636e8403287af0d4db8fe5bf49dee719f5b754Douglas Gregor 3749b832f6dea893f25b40500a04781286236281cb20Sebastian Redl return DAR_Succeeded; 375034b41d939a1328f484511c6002ba2456db879a29Richard Smith} 375134b41d939a1328f484511c6002ba2456db879a29Richard Smith 375262b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redlvoid Sema::DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init) { 375362b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl if (isa<InitListExpr>(Init)) 375462b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl Diag(VDecl->getLocation(), 375562b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl diag::err_auto_var_deduction_failure_from_init_list) 375662b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl << VDecl->getDeclName() << VDecl->getType() << Init->getSourceRange(); 375762b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl else 375862b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl Diag(VDecl->getLocation(), diag::err_auto_var_deduction_failure) 375962b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl << VDecl->getDeclName() << VDecl->getType() << Init->getType() 376062b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl << Init->getSourceRange(); 376162b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl} 376262b7cfb73e202051e7ab0dad42ba213acd0dec7eSebastian Redl 37638a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregorstatic void 37646fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisMarkUsedTemplateParameters(ASTContext &Ctx, QualType T, 3765e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 3766ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Level, 3767013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Deduced); 3768dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3769dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \brief If this is a non-static member function, 3770407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedmanstatic void AddImplicitObjectParameterType(ASTContext &Context, 377177bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor CXXMethodDecl *Method, 37725f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<QualType> &ArgTypes) { 3773407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman // C++11 [temp.func.order]p3: 3774407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman // [...] The new parameter is of type "reference to cv A," where cv are 3775407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman // the cv-qualifiers of the function template (if any) and A is 3776407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman // the class of which the function template is a member. 377777bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor // 3778407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman // The standard doesn't say explicitly, but we pick the appropriate kind of 3779407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman // reference type based on [over.match.funcs]p4. 378077bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor QualType ArgTy = Context.getTypeDeclType(Method->getParent()); 378177bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor ArgTy = Context.getQualifiedType(ArgTy, 378277bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor Qualifiers::fromCVRMask(Method->getTypeQualifiers())); 3783407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman if (Method->getRefQualifier() == RQ_RValue) 3784407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman ArgTy = Context.getRValueReferenceType(ArgTy); 3785407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman else 3786407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman ArgTy = Context.getLValueReferenceType(ArgTy); 378777bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor ArgTypes.push_back(ArgTy); 378877bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor} 378977bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor 37908a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \brief Determine whether the function template \p FT1 is at least as 37918a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// specialized as \p FT2. 37928a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregorstatic bool isAtLeastAsSpecializedAs(Sema &S, 37935769d6195087229770d7ac90449443e026c47103John McCall SourceLocation Loc, 37948a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FunctionTemplateDecl *FT1, 37958a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FunctionTemplateDecl *FT2, 37968a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplatePartialOrderingContext TPOC, 3797dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi unsigned NumCallArguments, 37985f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVectorImpl<RefParamPartialOrderingComparison> *RefParamComparisons) { 37998a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FunctionDecl *FD1 = FT1->getTemplatedDecl(); 3800dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi FunctionDecl *FD2 = FT2->getTemplatedDecl(); 38018a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor const FunctionProtoType *Proto1 = FD1->getType()->getAs<FunctionProtoType>(); 38028a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor const FunctionProtoType *Proto2 = FD2->getType()->getAs<FunctionProtoType>(); 3803dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 38048a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor assert(Proto1 && Proto2 && "Function templates must have prototypes"); 38058a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplateParameterList *TemplateParams = FT2->getTemplateParameters(); 38065f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> Deduced; 38078a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Deduced.resize(TemplateParams->size()); 38088a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 38098a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p3: 38108a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // The types used to determine the ordering depend on the context in which 38118a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // the partial ordering is done: 381293e4599196654907dad3bd476013ad05d36ce604Craig Topper TemplateDeductionInfo Info(Loc); 38138d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor CXXMethodDecl *Method1 = 0; 38148d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor CXXMethodDecl *Method2 = 0; 38158d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor bool IsNonStatic2 = false; 38168d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor bool IsNonStatic1 = false; 38178d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor unsigned Skip2 = 0; 38188a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor switch (TPOC) { 38198a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Call: { 38208a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - In the context of a function call, the function parameter types are 38218a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // used. 38228d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor Method1 = dyn_cast<CXXMethodDecl>(FD1); 38238d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor Method2 = dyn_cast<CXXMethodDecl>(FD2); 38248d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor IsNonStatic1 = Method1 && !Method1->isStatic(); 38258d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor IsNonStatic2 = Method2 && !Method2->isStatic(); 38268d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor 38279cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // C++11 [temp.func.order]p3: 38288d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // [...] If only one of the function templates is a non-static 38298d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // member, that function template is considered to have a new 38308d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // first parameter inserted in its function parameter list. The 38318d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // new parameter is of type "reference to cv A," where cv are 38328d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // the cv-qualifiers of the function template (if any) and A is 38338d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // the class of which the function template is a member. 38348d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // 38359cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // Note that we interpret this to mean "if one of the function 38369cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // templates is a non-static member and the other is a non-member"; 38379cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // otherwise, the ordering rules for static functions against non-static 38389cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // functions don't make any sense. 38399cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // 38408d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor // C++98/03 doesn't have this provision, so instead we drop the 38419cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // first argument of the free function, which seems to match 38429cef0064da0fe93cf60cc351d28ddf2e95fba0b3Eli Friedman // existing practice. 38435f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<QualType, 4> Args1; 384480ad52f327b532bded5c5b0ee38779d841c6cd35Richard Smith unsigned Skip1 = !S.getLangOpts().CPlusPlus11 && IsNonStatic2 && !Method1; 384580ad52f327b532bded5c5b0ee38779d841c6cd35Richard Smith if (S.getLangOpts().CPlusPlus11 && IsNonStatic1 && !Method2) 3846407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman AddImplicitObjectParameterType(S.Context, Method1, Args1); 3847dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Args1.insert(Args1.end(), 38488d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor Proto1->arg_type_begin() + Skip1, Proto1->arg_type_end()); 384977bc572138543ef97ebec137522b763d6a6ee909Douglas Gregor 38505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<QualType, 4> Args2; 385180ad52f327b532bded5c5b0ee38779d841c6cd35Richard Smith Skip2 = !S.getLangOpts().CPlusPlus11 && IsNonStatic1 && !Method2; 385280ad52f327b532bded5c5b0ee38779d841c6cd35Richard Smith if (S.getLangOpts().CPlusPlus11 && IsNonStatic2 && !Method1) 3853407c8470d50be8edaae7ed39a3139adf35af2921Eli Friedman AddImplicitObjectParameterType(S.Context, Method2, Args2); 3854dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Args2.insert(Args2.end(), 38558d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor Proto2->arg_type_begin() + Skip2, Proto2->arg_type_end()); 3856dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 38575c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // C++ [temp.func.order]p5: 38585c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // The presence of unused ellipsis and default arguments has no effect on 38595c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor // the partial ordering of function templates. 38605c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor if (Args1.size() > NumCallArguments) 38615c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Args1.resize(NumCallArguments); 38625c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor if (Args2.size() > NumCallArguments) 38635c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Args2.resize(NumCallArguments); 38645c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor if (DeduceTemplateArguments(S, TemplateParams, Args2.data(), Args2.size(), 38655c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Args1.data(), Args1.size(), Info, Deduced, 38665c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor TDF_None, /*PartialOrdering=*/true, 3867b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor RefParamComparisons)) 38688a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 3869dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 38708a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 38718a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 3872dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 38738a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Conversion: 38748a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - In the context of a call to a conversion operator, the return types 38758a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // of the conversion function templates are used. 3876bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl if (DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 3877bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Proto2->getResultType(), 3878bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Proto1->getResultType(), 3879bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF_None, 3880bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl /*PartialOrdering=*/true, 3881bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl RefParamComparisons)) 38828a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 38838a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 3884dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 38858a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Other: 38860099530a2288df7c2140dd8992b7310b9f6930a9NAKAMURA Takumi // - In other contexts (14.6.6.2) the function template's function type 38878a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // is used. 3888bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl if (DeduceTemplateArgumentsByTypeMatch(S, TemplateParams, 3889bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl FD2->getType(), FD1->getType(), 3890bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl Info, Deduced, TDF_None, 3891bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl /*PartialOrdering=*/true, 3892bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl RefParamComparisons)) 38938a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 38948a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 38958a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 3896dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 38978a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p11: 3898dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // In most cases, all template parameters must have values in order for 3899dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // deduction to succeed, but for partial ordering purposes a template 3900dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // parameter may remain without a value provided it is not used in the 39018a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // types being used for partial ordering. [ Note: a template parameter used 39028a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // in a non-deduced context is considered used. -end note] 39038a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor unsigned ArgIdx = 0, NumArgs = Deduced.size(); 39048a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor for (; ArgIdx != NumArgs; ++ArgIdx) 39058a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Deduced[ArgIdx].isNull()) 39068a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 39078a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 39088a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (ArgIdx == NumArgs) { 3909dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // All template arguments were deduced. FT1 is at least as specialized 39108a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // as FT2. 39118a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return true; 39128a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 39138a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 3914e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor // Figure out which template parameters were used. 3915013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector UsedParameters(TemplateParams->size()); 39168a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor switch (TPOC) { 39178a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Call: { 3918dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi unsigned NumParams = std::min(NumCallArguments, 3919dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi std::min(Proto1->getNumArgs(), 39205c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Proto2->getNumArgs())); 392180ad52f327b532bded5c5b0ee38779d841c6cd35Richard Smith if (S.getLangOpts().CPlusPlus11 && IsNonStatic2 && !IsNonStatic1) 39226fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis ::MarkUsedTemplateParameters(S.Context, Method2->getThisType(S.Context), 39236fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis false, 39248d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor TemplateParams->getDepth(), UsedParameters); 39258d706ecf488c4f548c4f8cf0aa08ea82a4d6a5baDouglas Gregor for (unsigned I = Skip2; I < NumParams; ++I) 39266fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis ::MarkUsedTemplateParameters(S.Context, Proto2->getArgType(I), false, 3927ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor TemplateParams->getDepth(), 3928e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor UsedParameters); 39298a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 39308a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 3931dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39328a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Conversion: 39336fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis ::MarkUsedTemplateParameters(S.Context, Proto2->getResultType(), false, 3934ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor TemplateParams->getDepth(), 3935e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor UsedParameters); 39368a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 3937dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39388a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Other: 39396fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis ::MarkUsedTemplateParameters(S.Context, FD2->getType(), false, 3940ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor TemplateParams->getDepth(), 3941ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor UsedParameters); 39428a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 39438a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 3944dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39458a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor for (; ArgIdx != NumArgs; ++ArgIdx) 39468a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // If this argument had no value deduced but was used in one of the types 39478a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // used for partial ordering, then deduction fails. 39488a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Deduced[ArgIdx].isNull() && UsedParameters[ArgIdx]) 39498a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 3950dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39518a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return true; 39528a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor} 3953dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39549da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor/// \brief Determine whether this a function template whose parameter-type-list 39559da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor/// ends with a function parameter pack. 39569da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregorstatic bool isVariadicFunctionTemplate(FunctionTemplateDecl *FunTmpl) { 39579da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor FunctionDecl *Function = FunTmpl->getTemplatedDecl(); 39589da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor unsigned NumParams = Function->getNumParams(); 39599da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor if (NumParams == 0) 39609da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor return false; 3961dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39629da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor ParmVarDecl *Last = Function->getParamDecl(NumParams - 1); 39639da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor if (!Last->isParameterPack()) 39649da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor return false; 3965dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39669da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor // Make sure that no previous parameter is a parameter pack. 39679da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor while (--NumParams > 0) { 39689da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor if (Function->getParamDecl(NumParams - 1)->isParameterPack()) 39699da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor return false; 39709da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor } 3971dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 39729da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor return true; 39739da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor} 3974dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 3975bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \brief Returns the more specialized function template according 397665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// to the rules of function template partial ordering (C++ [temp.func.order]). 397765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// 397865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// \param FT1 the first function template 397965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// 398065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// \param FT2 the second function template 398165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// 39828a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \param TPOC the context in which we are performing partial ordering of 39838a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// function templates. 39841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// 39855c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// \param NumCallArguments The number of arguments in a call, used only 39865c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// when \c TPOC is \c TPOC_Call. 39875c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// 3988bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \returns the more specialized function template. If neither 398965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// template is more specialized, returns NULL. 399065ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorFunctionTemplateDecl * 399165ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorSema::getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 399265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor FunctionTemplateDecl *FT2, 39935769d6195087229770d7ac90449443e026c47103John McCall SourceLocation Loc, 39945c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor TemplatePartialOrderingContext TPOC, 39955c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor unsigned NumCallArguments) { 39965f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<RefParamPartialOrderingComparison, 4> RefParamComparisons; 3997dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi bool Better1 = isAtLeastAsSpecializedAs(*this, Loc, FT1, FT2, TPOC, 39985c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor NumCallArguments, 0); 3999dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi bool Better2 = isAtLeastAsSpecializedAs(*this, Loc, FT2, FT1, TPOC, 40005c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor NumCallArguments, 4001b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor &RefParamComparisons); 4002dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 40038a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Better1 != Better2) // We have a clear winner 40048a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return Better1? FT1 : FT2; 4005dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 40068a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (!Better1 && !Better2) // Neither is better than the other 400765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return 0; 40088a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 40098a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p10: 4010dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If for each type being considered a given template is at least as 40118a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // specialized for all types and more specialized for some set of types and 4012dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // the other template is not more specialized for any types or is not at 40138a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // least as specialized for any types, then the given template is more 40148a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // specialized than the other template. Otherwise, neither template is more 40158a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // specialized than the other. 40168a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Better1 = false; 40178a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Better2 = false; 4018b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor for (unsigned I = 0, N = RefParamComparisons.size(); I != N; ++I) { 40198a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p9: 40208a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // If, for a given type, deduction succeeds in both directions (i.e., the 4021b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // types are identical after the transformations above) and both P and A 4022b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // were reference types (before being replaced with the type referred to 4023b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // above): 4024b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor 4025dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // -- if the type from the argument template was an lvalue reference 4026b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // and the type from the parameter template was not, the argument 4027b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // type is considered to be more specialized than the other; 4028b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // otherwise, 4029b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor if (!RefParamComparisons[I].ArgIsRvalueRef && 4030b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor RefParamComparisons[I].ParamIsRvalueRef) { 4031b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Better2 = true; 4032b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor if (Better1) 4033b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor return 0; 4034b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor continue; 4035b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor } else if (!RefParamComparisons[I].ParamIsRvalueRef && 4036b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor RefParamComparisons[I].ArgIsRvalueRef) { 4037b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Better1 = true; 4038b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor if (Better2) 4039b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor return 0; 4040b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor continue; 4041b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor } 4042dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4043b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // -- if the type from the argument template is more cv-qualified than 4044b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // the type from the parameter template (as described above), the 4045b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // argument type is considered to be more specialized than the 4046b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // other; otherwise, 4047b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor switch (RefParamComparisons[I].Qualifiers) { 4048b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor case NeitherMoreQualified: 4049b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor break; 4050dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4051b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor case ParamMoreQualified: 4052b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Better1 = true; 4053b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor if (Better2) 4054b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor return 0; 4055b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor continue; 4056dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4057b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor case ArgMoreQualified: 4058b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor Better2 = true; 4059b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor if (Better1) 4060b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor return 0; 4061b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor continue; 40628a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 4063dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4064b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor // -- neither type is more specialized than the other. 40658a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 4066dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 40678a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor assert(!(Better1 && Better2) && "Should have broken out in the loop above"); 406865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (Better1) 406965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return FT1; 40708a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor else if (Better2) 40718a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return FT2; 4072dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 40739da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor // FIXME: This mimics what GCC implements, but doesn't match up with the 40749da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor // proposed resolution for core issue 692. This area needs to be sorted out, 40759da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor // but for now we attempt to maintain compatibility. 40769da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor bool Variadic1 = isVariadicFunctionTemplate(FT1); 40779da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor bool Variadic2 = isVariadicFunctionTemplate(FT2); 40789da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor if (Variadic1 != Variadic2) 40799da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor return Variadic1? FT2 : FT1; 4080dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 40819da95e6eefc4b0ca25e18bdab1b703f5c185deabDouglas Gregor return 0; 408265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor} 408383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 4084d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \brief Determine if the two templates are equivalent. 4085d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregorstatic bool isSameTemplate(TemplateDecl *T1, TemplateDecl *T2) { 4086d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (T1 == T2) 4087d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor return true; 4088dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4089d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (!T1 || !T2) 4090d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor return false; 4091dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4092d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor return T1->getCanonicalDecl() == T2->getCanonicalDecl(); 4093d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor} 4094d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 4095d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \brief Retrieve the most specialized of the given function template 4096d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// specializations. 4097d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4098c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// \param SpecBegin the start iterator of the function template 4099c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// specializations that we will be comparing. 4100d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4101c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// \param SpecEnd the end iterator of the function template 4102c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// specializations, paired with \p SpecBegin. 4103d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4104d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param TPOC the partial ordering context to use to compare the function 4105d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// template specializations. 4106d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 41075c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// \param NumCallArguments The number of arguments in a call, used only 41085c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// when \c TPOC is \c TPOC_Call. 41095c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor/// 4110dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \param Loc the location where the ambiguity or no-specializations 4111d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// diagnostic should occur. 4112d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4113d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param NoneDiag partial diagnostic used to diagnose cases where there are 4114d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// no matching candidates. 4115d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4116d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param AmbigDiag partial diagnostic used to diagnose an ambiguity, if one 4117d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// occurs. 4118d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4119d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param CandidateDiag partial diagnostic used for each function template 4120d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// specialization that is a candidate in the ambiguous ordering. One parameter 4121d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// in this diagnostic should be unbound, which will correspond to the string 4122d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// describing the template arguments for the function template specialization. 4123d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4124dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \returns the most specialized function template specialization, if 4125c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// found. Otherwise, returns SpecEnd. 4126d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 4127dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi/// \todo FIXME: Consider passing in the "also-ran" candidates that failed 4128d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// template argument deduction. 4129c373d48502ca7683ab55385f5bd624d778eb288dJohn McCallUnresolvedSetIterator 4130c373d48502ca7683ab55385f5bd624d778eb288dJohn McCallSema::getMostSpecialized(UnresolvedSetIterator SpecBegin, 41315c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor UnresolvedSetIterator SpecEnd, 4132c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall TemplatePartialOrderingContext TPOC, 41335c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor unsigned NumCallArguments, 4134c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall SourceLocation Loc, 4135c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall const PartialDiagnostic &NoneDiag, 4136c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall const PartialDiagnostic &AmbigDiag, 41371be8eec3ddd2a23c19b453c2639226174eb5d4a8Douglas Gregor const PartialDiagnostic &CandidateDiag, 41386efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu bool Complain, 41396efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu QualType TargetType) { 4140c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall if (SpecBegin == SpecEnd) { 41411be8eec3ddd2a23c19b453c2639226174eb5d4a8Douglas Gregor if (Complain) 41421be8eec3ddd2a23c19b453c2639226174eb5d4a8Douglas Gregor Diag(Loc, NoneDiag); 4143c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return SpecEnd; 4144d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 4145dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4146dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (SpecBegin + 1 == SpecEnd) 4147c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return SpecBegin; 4148dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4149d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // Find the function template that is better than all of the templates it 4150d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // has been compared to. 4151c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall UnresolvedSetIterator Best = SpecBegin; 4152dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi FunctionTemplateDecl *BestTemplate 4153c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall = cast<FunctionDecl>(*Best)->getPrimaryTemplate(); 4154d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor assert(BestTemplate && "Not a function template specialization?"); 4155c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall for (UnresolvedSetIterator I = SpecBegin + 1; I != SpecEnd; ++I) { 4156c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall FunctionTemplateDecl *Challenger 4157c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall = cast<FunctionDecl>(*I)->getPrimaryTemplate(); 4158d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor assert(Challenger && "Not a function template specialization?"); 4159c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall if (isSameTemplate(getMoreSpecializedTemplate(BestTemplate, Challenger, 41605c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Loc, TPOC, NumCallArguments), 4161d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Challenger)) { 4162d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Best = I; 4163d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor BestTemplate = Challenger; 4164d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 4165d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 4166dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4167d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // Make sure that the "best" function template is more specialized than all 4168d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // of the others. 4169d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor bool Ambiguous = false; 4170c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall for (UnresolvedSetIterator I = SpecBegin; I != SpecEnd; ++I) { 4171c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall FunctionTemplateDecl *Challenger 4172c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall = cast<FunctionDecl>(*I)->getPrimaryTemplate(); 4173d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (I != Best && 4174dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi !isSameTemplate(getMoreSpecializedTemplate(BestTemplate, Challenger, 41755c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor Loc, TPOC, NumCallArguments), 4176d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor BestTemplate)) { 4177d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Ambiguous = true; 4178d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor break; 4179d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 4180d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 4181dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4182d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (!Ambiguous) { 4183d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // We found an answer. Return it. 4184c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return Best; 4185d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 4186dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4187d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // Diagnose the ambiguity. 41881be8eec3ddd2a23c19b453c2639226174eb5d4a8Douglas Gregor if (Complain) 41891be8eec3ddd2a23c19b453c2639226174eb5d4a8Douglas Gregor Diag(Loc, AmbigDiag); 4190dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 41911be8eec3ddd2a23c19b453c2639226174eb5d4a8Douglas Gregor if (Complain) 4192d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // FIXME: Can we order the candidates in some sane way? 41936efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu for (UnresolvedSetIterator I = SpecBegin; I != SpecEnd; ++I) { 41946efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu PartialDiagnostic PD = CandidateDiag; 41956efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu PD << getTemplateArgumentBindingsText( 41961be8eec3ddd2a23c19b453c2639226174eb5d4a8Douglas Gregor cast<FunctionDecl>(*I)->getPrimaryTemplate()->getTemplateParameters(), 4197c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall *cast<FunctionDecl>(*I)->getTemplateSpecializationArgs()); 41986efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu if (!TargetType.isNull()) 41996efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu HandleFunctionTypeMismatch(PD, cast<FunctionDecl>(*I)->getType(), 42006efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu TargetType); 42016efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu Diag((*I)->getLocation(), PD); 42026efd4c55a1a481d92966a91141c03e8145234cf6Richard Trieu } 4203dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4204c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return SpecEnd; 4205d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor} 4206d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 4207bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \brief Returns the more specialized class template partial specialization 4208bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// according to the rules of partial ordering of class template partial 4209bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// specializations (C++ [temp.class.order]). 4210bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// 4211bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \param PS1 the first class template partial specialization 4212bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// 4213bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \param PS2 the second class template partial specialization 4214bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// 4215bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \returns the more specialized class template partial specialization. If 4216bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// neither partial specialization is more specialized, returns NULL. 4217bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas GregorClassTemplatePartialSpecializationDecl * 4218bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas GregorSema::getMoreSpecializedPartialSpecialization( 4219bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor ClassTemplatePartialSpecializationDecl *PS1, 42205769d6195087229770d7ac90449443e026c47103John McCall ClassTemplatePartialSpecializationDecl *PS2, 42215769d6195087229770d7ac90449443e026c47103John McCall SourceLocation Loc) { 4222bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // C++ [temp.class.order]p1: 4223bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // For two class template partial specializations, the first is at least as 4224dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // specialized as the second if, given the following rewrite to two 4225dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // function templates, the first function template is at least as 4226dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // specialized as the second according to the ordering rules for function 4227bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // templates (14.6.6.2): 4228bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // - the first function template has the same template parameters as the 4229dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // first partial specialization and has a single function parameter 4230dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // whose type is a class template specialization with the template 4231bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // arguments of the first partial specialization, and 4232bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // - the second function template has the same template parameters as the 4233dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // second partial specialization and has a single function parameter 4234dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // whose type is a class template specialization with the template 4235bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // arguments of the second partial specialization. 4236bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // 423731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // Rather than synthesize function templates, we merely perform the 423831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // equivalent partial ordering by performing deduction directly on 423931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // the template arguments of the class template partial 424031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // specializations. This computation is slightly simpler than the 424131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // general problem of function template partial ordering, because 424231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // class template partial specializations are more constrained. We 424331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // know that every template parameter is deducible from the class 424431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // template partial specialization's template arguments, for 424531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // example. 42465f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<DeducedTemplateArgument, 4> Deduced; 424793e4599196654907dad3bd476013ad05d36ce604Craig Topper TemplateDeductionInfo Info(Loc); 424831f17ecbef57b5679c017c375db330546b7b5145John McCall 424931f17ecbef57b5679c017c375db330546b7b5145John McCall QualType PT1 = PS1->getInjectedSpecializationType(); 425031f17ecbef57b5679c017c375db330546b7b5145John McCall QualType PT2 = PS2->getInjectedSpecializationType(); 4251dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4252bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // Determine whether PS1 is at least as specialized as PS2 4253bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Deduced.resize(PS2->getTemplateParameters()->size()); 4254bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl bool Better1 = !DeduceTemplateArgumentsByTypeMatch(*this, 4255bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl PS2->getTemplateParameters(), 42565c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor PT2, PT1, Info, Deduced, TDF_None, 4257dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi /*PartialOrdering=*/true, 4258b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor /*RefParamComparisons=*/0); 42592c4792c731690dbbcbe69dd0625977adffc2961aArgyrios Kyrtzidis if (Better1) { 42607e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(),Deduced.end()); 42612c4792c731690dbbcbe69dd0625977adffc2961aArgyrios Kyrtzidis InstantiatingTemplate Inst(*this, PS2->getLocation(), PS2, 42627e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith DeducedArgs, Info); 4263dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Better1 = !::FinishTemplateArgumentDeduction(*this, PS2, 4264dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi PS1->getTemplateArgs(), 4265516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor Deduced, Info); 42662c4792c731690dbbcbe69dd0625977adffc2961aArgyrios Kyrtzidis } 4267dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4268bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // Determine whether PS2 is at least as specialized as PS1 4269db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Deduced.clear(); 4270bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Deduced.resize(PS1->getTemplateParameters()->size()); 4271bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl bool Better2 = !DeduceTemplateArgumentsByTypeMatch(*this, 4272bb95e51a3668c50133b989467cd44ba4d8a42e8aSebastian Redl PS1->getTemplateParameters(), 42735c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor PT1, PT2, Info, Deduced, TDF_None, 42745c7bf42ef16dc767615bed10f3b7b3c1265314e1Douglas Gregor /*PartialOrdering=*/true, 4275b939a1987318f802fd25f89e15ae7d2423161cacDouglas Gregor /*RefParamComparisons=*/0); 42762c4792c731690dbbcbe69dd0625977adffc2961aArgyrios Kyrtzidis if (Better2) { 42777e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith SmallVector<TemplateArgument, 4> DeducedArgs(Deduced.begin(),Deduced.end()); 42782c4792c731690dbbcbe69dd0625977adffc2961aArgyrios Kyrtzidis InstantiatingTemplate Inst(*this, PS1->getLocation(), PS1, 42797e54fb5fcc7d7b8e843501652cf7c19cea6c4c57Richard Smith DeducedArgs, Info); 4280dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi Better2 = !::FinishTemplateArgumentDeduction(*this, PS1, 4281dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi PS2->getTemplateArgs(), 4282516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor Deduced, Info); 42832c4792c731690dbbcbe69dd0625977adffc2961aArgyrios Kyrtzidis } 4284dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4285bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor if (Better1 == Better2) 4286bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor return 0; 4287dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4288bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor return Better1? PS1 : PS2; 4289bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor} 4290bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor 42911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 42926fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisMarkUsedTemplateParameters(ASTContext &Ctx, 4293e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor const TemplateArgument &TemplateArg, 4294e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 4295ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 4296013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Used); 4297031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4298e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 4299031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// expression. 43001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 43016fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisMarkUsedTemplateParameters(ASTContext &Ctx, 4302e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor const Expr *E, 4303e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 4304ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 4305013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Used) { 4306be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor // We can deduce from a pack expansion. 4307be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor if (const PackExpansionExpr *Expansion = dyn_cast<PackExpansionExpr>(E)) 4308be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor E = Expansion->getPattern(); 4309dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 43106098381c29c2693832aa81ef046cf21a49729436Richard Smith // Skip through any implicit casts we added while type-checking, and any 43116098381c29c2693832aa81ef046cf21a49729436Richard Smith // substitutions performed by template alias expansion. 43126098381c29c2693832aa81ef046cf21a49729436Richard Smith while (1) { 43136098381c29c2693832aa81ef046cf21a49729436Richard Smith if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) 43146098381c29c2693832aa81ef046cf21a49729436Richard Smith E = ICE->getSubExpr(); 43156098381c29c2693832aa81ef046cf21a49729436Richard Smith else if (const SubstNonTypeTemplateParmExpr *Subst = 43166098381c29c2693832aa81ef046cf21a49729436Richard Smith dyn_cast<SubstNonTypeTemplateParmExpr>(E)) 43176098381c29c2693832aa81ef046cf21a49729436Richard Smith E = Subst->getReplacement(); 43186098381c29c2693832aa81ef046cf21a49729436Richard Smith else 43196098381c29c2693832aa81ef046cf21a49729436Richard Smith break; 43206098381c29c2693832aa81ef046cf21a49729436Richard Smith } 4321dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4322dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // FIXME: if !OnlyDeduced, we have to walk the whole subexpression to 4323e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor // find other occurrences of template parameters. 4324f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); 4325c781f9cd854f3d5d1c826f4a13382c6abca4cff7Douglas Gregor if (!DRE) 4326031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor return; 4327031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 43281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const NonTypeTemplateParmDecl *NTTP 4329031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor = dyn_cast<NonTypeTemplateParmDecl>(DRE->getDecl()); 4330031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor if (!NTTP) 4331031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor return; 4332031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4333ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor if (NTTP->getDepth() == Depth) 4334ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used[NTTP->getIndex()] = true; 4335031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 4336031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4337e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 4338e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// nested name specifier. 4339e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregorstatic void 43406fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisMarkUsedTemplateParameters(ASTContext &Ctx, 4341e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor NestedNameSpecifier *NNS, 4342e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 4343ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 4344013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Used) { 4345e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (!NNS) 4346e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor return; 4347dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 43486fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, NNS->getPrefix(), OnlyDeduced, Depth, 4349ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used); 43506fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, QualType(NNS->getAsType(), 0), 4351ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 4352e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor} 4353dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4354e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 4355e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// template name. 4356e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregorstatic void 43576fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisMarkUsedTemplateParameters(ASTContext &Ctx, 4358e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor TemplateName Name, 4359e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 4360ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 4361013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Used) { 4362e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 4363e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (TemplateTemplateParmDecl *TTP 4364ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor = dyn_cast<TemplateTemplateParmDecl>(Template)) { 4365ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor if (TTP->getDepth() == Depth) 4366ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used[TTP->getIndex()] = true; 4367ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor } 4368e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor return; 4369e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor } 4370dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4371788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor if (QualifiedTemplateName *QTN = Name.getAsQualifiedTemplateName()) 43726fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, QTN->getQualifier(), OnlyDeduced, 4373788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Depth, Used); 4374e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) 43756fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, DTN->getQualifier(), OnlyDeduced, 4376ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 4377e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor} 4378e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor 4379e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 4380031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// type. 43811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 43826fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisMarkUsedTemplateParameters(ASTContext &Ctx, QualType T, 4383e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 4384ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 4385013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Used) { 4386e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (T.isNull()) 4387e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor return; 4388dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4389031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor // Non-dependent types have nothing deducible 4390031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor if (!T->isDependentType()) 4391031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor return; 4392031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 43936fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis T = Ctx.getCanonicalType(T); 4394031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor switch (T->getTypeClass()) { 4395031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Pointer: 43966fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4397e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<PointerType>(T)->getPointeeType(), 4398e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor OnlyDeduced, 4399ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, 4400e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor Used); 4401031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4402031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4403031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::BlockPointer: 44046fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4405e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<BlockPointerType>(T)->getPointeeType(), 4406e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor OnlyDeduced, 4407ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, 4408e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor Used); 4409031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4410031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4411031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::LValueReference: 4412031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::RValueReference: 44136fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4414e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<ReferenceType>(T)->getPointeeType(), 4415e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor OnlyDeduced, 4416ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, 4417e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor Used); 4418031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4419031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4420031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::MemberPointer: { 4421031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor const MemberPointerType *MemPtr = cast<MemberPointerType>(T.getTypePtr()); 44226fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, MemPtr->getPointeeType(), OnlyDeduced, 4423ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 44246fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, QualType(MemPtr->getClass(), 0), 4425ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 4426031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4427031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 4428031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4429031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::DependentSizedArray: 44306fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4431e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<DependentSizedArrayType>(T)->getSizeExpr(), 4432ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 4433031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor // Fall through to check the element type 4434031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4435031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::ConstantArray: 4436031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::IncompleteArray: 44376fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4438e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<ArrayType>(T)->getElementType(), 4439ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 4440031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4441031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4442031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Vector: 4443031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::ExtVector: 44446fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4445e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<VectorType>(T)->getElementType(), 4446ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 4447031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4448031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 44499cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor case Type::DependentSizedExtVector: { 44509cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor const DependentSizedExtVectorType *VecType 4451f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor = cast<DependentSizedExtVectorType>(T); 44526fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, VecType->getElementType(), OnlyDeduced, 4453ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 44546fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, VecType->getSizeExpr(), OnlyDeduced, 4455ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 44569cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor break; 44579cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor } 44589cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor 4459031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::FunctionProto: { 4460f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor const FunctionProtoType *Proto = cast<FunctionProtoType>(T); 44616fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, Proto->getResultType(), OnlyDeduced, 4462ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 4463031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor for (unsigned I = 0, N = Proto->getNumArgs(); I != N; ++I) 44646fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, Proto->getArgType(I), OnlyDeduced, 4465ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 4466031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4467031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 4468031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4469ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor case Type::TemplateTypeParm: { 4470ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor const TemplateTypeParmType *TTP = cast<TemplateTypeParmType>(T); 4471ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor if (TTP->getDepth() == Depth) 4472ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used[TTP->getIndex()] = true; 4473031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4474ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor } 4475031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 44760bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor case Type::SubstTemplateTypeParmPack: { 44770bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor const SubstTemplateTypeParmPackType *Subst 44780bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor = cast<SubstTemplateTypeParmPackType>(T); 44796fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 44800bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor QualType(Subst->getReplacedParameter(), 0), 44810bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor OnlyDeduced, Depth, Used); 44826fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, Subst->getArgumentPack(), 44830bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor OnlyDeduced, Depth, Used); 44840bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor break; 44850bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor } 44860bc15d92bf98cd01e7904d7fca9895dacc237618Douglas Gregor 448731f17ecbef57b5679c017c375db330546b7b5145John McCall case Type::InjectedClassName: 448831f17ecbef57b5679c017c375db330546b7b5145John McCall T = cast<InjectedClassNameType>(T)->getInjectedSpecializationType(); 448931f17ecbef57b5679c017c375db330546b7b5145John McCall // fall through 449031f17ecbef57b5679c017c375db330546b7b5145John McCall 4491031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::TemplateSpecialization: { 44921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const TemplateSpecializationType *Spec 4493f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor = cast<TemplateSpecializationType>(T); 44946fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, Spec->getTemplateName(), OnlyDeduced, 4495ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 4496dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 44977b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor // C++0x [temp.deduct.type]p9: 4498dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If the template argument list of P contains a pack expansion that is not 4499dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // the last template argument, the entire template argument list is a 45007b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor // non-deduced context. 4501dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (OnlyDeduced && 45027b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor hasPackExpansionBeforeEnd(Spec->getArgs(), Spec->getNumArgs())) 45037b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor break; 45047b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor 4505e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I) 45066fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, Spec->getArg(I), OnlyDeduced, Depth, 4507ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used); 4508e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor break; 4509e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor } 45101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4511e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor case Type::Complex: 4512e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (!OnlyDeduced) 45136fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4514e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<ComplexType>(T)->getElementType(), 4515ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 4516e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor break; 4517031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4518b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman case Type::Atomic: 4519b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman if (!OnlyDeduced) 45206fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4521b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman cast<AtomicType>(T)->getValueType(), 4522b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman OnlyDeduced, Depth, Used); 4523b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman break; 4524b001de7458d17c17e6d8b8034c7cfcefd3b70c00Eli Friedman 45254714c12a1ab759156b78be8f109ea4c12213af57Douglas Gregor case Type::DependentName: 4526e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (!OnlyDeduced) 45276fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 45284714c12a1ab759156b78be8f109ea4c12213af57Douglas Gregor cast<DependentNameType>(T)->getQualifier(), 4529ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 4530031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4531031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 453233500955d731c73717af52088b7fc0e7a85681e7John McCall case Type::DependentTemplateSpecialization: { 453333500955d731c73717af52088b7fc0e7a85681e7John McCall const DependentTemplateSpecializationType *Spec 453433500955d731c73717af52088b7fc0e7a85681e7John McCall = cast<DependentTemplateSpecializationType>(T); 453533500955d731c73717af52088b7fc0e7a85681e7John McCall if (!OnlyDeduced) 45366fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, Spec->getQualifier(), 453733500955d731c73717af52088b7fc0e7a85681e7John McCall OnlyDeduced, Depth, Used); 4538dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 45397b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor // C++0x [temp.deduct.type]p9: 4540dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If the template argument list of P contains a pack expansion that is not 4541dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // the last template argument, the entire template argument list is a 45427b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor // non-deduced context. 4543dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (OnlyDeduced && 45447b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor hasPackExpansionBeforeEnd(Spec->getArgs(), Spec->getNumArgs())) 45457b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor break; 45467b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor 454733500955d731c73717af52088b7fc0e7a85681e7John McCall for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I) 45486fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, Spec->getArg(I), OnlyDeduced, Depth, 454933500955d731c73717af52088b7fc0e7a85681e7John McCall Used); 455033500955d731c73717af52088b7fc0e7a85681e7John McCall break; 455133500955d731c73717af52088b7fc0e7a85681e7John McCall } 455233500955d731c73717af52088b7fc0e7a85681e7John McCall 4553ad5e73887052193afda72db8efcb812bd083a4a8John McCall case Type::TypeOf: 4554ad5e73887052193afda72db8efcb812bd083a4a8John McCall if (!OnlyDeduced) 45556fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4556ad5e73887052193afda72db8efcb812bd083a4a8John McCall cast<TypeOfType>(T)->getUnderlyingType(), 4557ad5e73887052193afda72db8efcb812bd083a4a8John McCall OnlyDeduced, Depth, Used); 4558ad5e73887052193afda72db8efcb812bd083a4a8John McCall break; 4559ad5e73887052193afda72db8efcb812bd083a4a8John McCall 4560ad5e73887052193afda72db8efcb812bd083a4a8John McCall case Type::TypeOfExpr: 4561ad5e73887052193afda72db8efcb812bd083a4a8John McCall if (!OnlyDeduced) 45626fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4563ad5e73887052193afda72db8efcb812bd083a4a8John McCall cast<TypeOfExprType>(T)->getUnderlyingExpr(), 4564ad5e73887052193afda72db8efcb812bd083a4a8John McCall OnlyDeduced, Depth, Used); 4565ad5e73887052193afda72db8efcb812bd083a4a8John McCall break; 4566ad5e73887052193afda72db8efcb812bd083a4a8John McCall 4567ad5e73887052193afda72db8efcb812bd083a4a8John McCall case Type::Decltype: 4568ad5e73887052193afda72db8efcb812bd083a4a8John McCall if (!OnlyDeduced) 45696fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4570ad5e73887052193afda72db8efcb812bd083a4a8John McCall cast<DecltypeType>(T)->getUnderlyingExpr(), 4571ad5e73887052193afda72db8efcb812bd083a4a8John McCall OnlyDeduced, Depth, Used); 4572ad5e73887052193afda72db8efcb812bd083a4a8John McCall break; 4573ca63c200346c0ca9e00194ec6e34a5a7b0ed9321Sean Hunt 4574ca63c200346c0ca9e00194ec6e34a5a7b0ed9321Sean Hunt case Type::UnaryTransform: 4575ca63c200346c0ca9e00194ec6e34a5a7b0ed9321Sean Hunt if (!OnlyDeduced) 45766fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4577ca63c200346c0ca9e00194ec6e34a5a7b0ed9321Sean Hunt cast<UnaryTransformType>(T)->getUnderlyingType(), 4578ca63c200346c0ca9e00194ec6e34a5a7b0ed9321Sean Hunt OnlyDeduced, Depth, Used); 4579ca63c200346c0ca9e00194ec6e34a5a7b0ed9321Sean Hunt break; 4580ad5e73887052193afda72db8efcb812bd083a4a8John McCall 45817536dd5e6c99584481b7dab68b7e7d8df9c54054Douglas Gregor case Type::PackExpansion: 45826fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 45837536dd5e6c99584481b7dab68b7e7d8df9c54054Douglas Gregor cast<PackExpansionType>(T)->getPattern(), 45847536dd5e6c99584481b7dab68b7e7d8df9c54054Douglas Gregor OnlyDeduced, Depth, Used); 45857536dd5e6c99584481b7dab68b7e7d8df9c54054Douglas Gregor break; 45867536dd5e6c99584481b7dab68b7e7d8df9c54054Douglas Gregor 458734b41d939a1328f484511c6002ba2456db879a29Richard Smith case Type::Auto: 45886fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 458934b41d939a1328f484511c6002ba2456db879a29Richard Smith cast<AutoType>(T)->getDeducedType(), 459034b41d939a1328f484511c6002ba2456db879a29Richard Smith OnlyDeduced, Depth, Used); 459134b41d939a1328f484511c6002ba2456db879a29Richard Smith 4592e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor // None of these types have any template parameters in them. 4593031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Builtin: 4594031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::VariableArray: 4595031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::FunctionNoProto: 4596031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Record: 4597031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Enum: 4598031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::ObjCInterface: 4599c12c5bba6ceb6acd4e51e7a0fc03257da9cfd44eJohn McCall case Type::ObjCObject: 4600d1b3c2dd5bc1f3103bee6137957aa7c5f8f2f0bcSteve Naroff case Type::ObjCObjectPointer: 4601ed97649e9574b9d854fa4d6109c9333ae0993554John McCall case Type::UnresolvedUsing: 4602031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define TYPE(Class, Base) 4603031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define ABSTRACT_TYPE(Class, Base) 4604031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define DEPENDENT_TYPE(Class, Base) 4605031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4606031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#include "clang/AST/TypeNodes.def" 4607031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4608031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 4609031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 4610031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4611e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by this 4612031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// template argument. 46131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 46146fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisMarkUsedTemplateParameters(ASTContext &Ctx, 4615e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor const TemplateArgument &TemplateArg, 4616e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 4617ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 4618013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Used) { 4619031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor switch (TemplateArg.getKind()) { 4620031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Null: 4621031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Integral: 4622d2008e2c80d6c9282044ec873a937a17a0f33579Douglas Gregor case TemplateArgument::Declaration: 4623031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 46241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4625d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman case TemplateArgument::NullPtr: 4626d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman MarkUsedTemplateParameters(Ctx, TemplateArg.getNullPtrType(), OnlyDeduced, 4627d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman Depth, Used); 4628d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman break; 4629d7a6b1640e565487d163023a6a2e83f55476ae96Eli Friedman 4630031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Type: 46316fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, TemplateArg.getAsType(), OnlyDeduced, 4632ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 4633031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4634031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4635788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Template: 4636a7fc901a2e39bfe55bfcff5934b2d9fdf9656491Douglas Gregor case TemplateArgument::TemplateExpansion: 46376fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, 4638dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi TemplateArg.getAsTemplateOrTemplatePattern(), 4639788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor OnlyDeduced, Depth, Used); 4640031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4641031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 4642031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Expression: 46436fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, TemplateArg.getAsExpr(), OnlyDeduced, 4644ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 4645031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 4646dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 4647d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson case TemplateArgument::Pack: 4648e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor for (TemplateArgument::pack_iterator P = TemplateArg.pack_begin(), 4649e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor PEnd = TemplateArg.pack_end(); 4650e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor P != PEnd; ++P) 46516fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis MarkUsedTemplateParameters(Ctx, *P, OnlyDeduced, Depth, Used); 4652d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson break; 4653031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 4654031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 4655031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 465616ae9de07730832945204877d752db7f1c070962James Dennett/// \brief Mark which template parameters can be deduced from a given 4657031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// template argument list. 4658031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// 4659031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// \param TemplateArgs the template argument list from which template 4660031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// parameters will be deduced. 4661031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// 466216ae9de07730832945204877d752db7f1c070962James Dennett/// \param Used a bit vector whose elements will be set to \c true 4663031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// to indicate when the corresponding template parameter will be 4664031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// deduced. 46651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid 4666e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorSema::MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4667ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor bool OnlyDeduced, unsigned Depth, 4668013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Used) { 46697b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor // C++0x [temp.deduct.type]p9: 4670dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // If the template argument list of P contains a pack expansion that is not 4671dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi // the last template argument, the entire template argument list is a 46727b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor // non-deduced context. 4673dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi if (OnlyDeduced && 46747b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor hasPackExpansionBeforeEnd(TemplateArgs.data(), TemplateArgs.size())) 46757b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor return; 46767b976ece336d209977b25b5c28ee09c2d2146e6aDouglas Gregor 4677031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) 46786fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis ::MarkUsedTemplateParameters(Context, TemplateArgs[I], OnlyDeduced, 4679ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 4680031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 468163f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor 468263f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor/// \brief Marks all of the template parameters that will be deduced by a 468363f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor/// call to the given function template. 4684dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumivoid 46856fc9e1d98205649e4d0f741d194d288a45995a62Argyrios KyrtzidisSema::MarkDeducedTemplateParameters(ASTContext &Ctx, 468689cf425f1136f8d24a64ed94450e488b6794dfa4Dmitri Gribenko const FunctionTemplateDecl *FunctionTemplate, 4687013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector &Deduced) { 4688dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi TemplateParameterList *TemplateParams 468963f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor = FunctionTemplate->getTemplateParameters(); 469063f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor Deduced.clear(); 469163f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor Deduced.resize(TemplateParams->size()); 4692dfbb02a16ac8c764b5ba1742450513d6212d2f9fNAKAMURA Takumi 469363f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 469463f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor for (unsigned I = 0, N = Function->getNumParams(); I != N; ++I) 46956fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis ::MarkUsedTemplateParameters(Ctx, Function->getParamDecl(I)->getType(), 4696ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor true, TemplateParams->getDepth(), Deduced); 469763f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor} 4698dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 4699dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregorbool hasDeducibleTemplateParameters(Sema &S, 4700dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor FunctionTemplateDecl *FunctionTemplate, 4701dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor QualType T) { 4702dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor if (!T->isDependentType()) 4703dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor return false; 4704dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 4705dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor TemplateParameterList *TemplateParams 4706dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor = FunctionTemplate->getTemplateParameters(); 4707013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer llvm::SmallBitVector Deduced(TemplateParams->size()); 47086fc9e1d98205649e4d0f741d194d288a45995a62Argyrios Kyrtzidis ::MarkUsedTemplateParameters(S.Context, T, true, TemplateParams->getDepth(), 4709dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor Deduced); 4710dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor 4711013b3668b67c8cb3ad2ee516c5607a3eba11829fBenjamin Kramer return Deduced.any(); 4712dbfb371e297794e827ad2e5b33b45fafbfc46b29Douglas Gregor} 4713