SemaTemplateDeduction.cpp revision 516e6e09821a61e8975c787e189949723249e7c5
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 130b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "Sema.h" 140b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/ASTContext.h" 150b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/DeclTemplate.h" 160b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/StmtVisitor.h" 170b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/Expr.h" 180b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/AST/ExprCXX.h" 190b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor#include "clang/Parse/DeclSpec.h" 208a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor#include <algorithm> 21508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor 22508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregornamespace clang { 23508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Various flags that control template argument deduction. 24508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// 25508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// These flags can be bitwise-OR'd together. 26508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor enum TemplateDeductionFlags { 27508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief No template argument deduction flags, which indicates the 28508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// strictest results for template argument deduction (as used for, e.g., 29508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// matching class template partial specializations). 30508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF_None = 0, 31508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Within template argument deduction from a function call, we are 32508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// matching with a parameter type for which the original parameter was 33508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// a reference. 34508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF_ParamWithReferenceType = 0x1, 35508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Within template argument deduction from a function call, we 36508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// are matching in a case where we ignore cv-qualifiers. 37508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF_IgnoreQualifiers = 0x02, 38508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// \brief Within template argument deduction from a function call, 39508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor /// we are matching in a case where we can perform template argument 404112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor /// deduction from a template-id of a derived class of the argument type. 411282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor TDF_DerivedClass = 0x04, 421282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor /// \brief Allow non-dependent types to differ, e.g., when performing 431282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor /// template argument deduction from a function call where conversions 441282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor /// may apply. 451282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor TDF_SkipNonDependent = 0x08 46508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor }; 47508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor} 48508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor 490b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregorusing namespace clang; 500b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 519d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor/// \brief Compare two APSInts, extending and switching the sign as 529d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor/// necessary to compare their values regardless of underlying type. 539d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregorstatic bool hasSameExtendedValue(llvm::APSInt X, llvm::APSInt Y) { 549d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if (Y.getBitWidth() > X.getBitWidth()) 559d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor X.extend(Y.getBitWidth()); 569d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor else if (Y.getBitWidth() < X.getBitWidth()) 579d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Y.extend(X.getBitWidth()); 589d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 599d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor // If there is a signedness mismatch, correct it. 609d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if (X.isSigned() != Y.isSigned()) { 619d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor // If the signed value is negative, then the values cannot be the same. 629d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if ((Y.isSigned() && Y.isNegative()) || (X.isSigned() && X.isNegative())) 639d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor return false; 649d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 659d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Y.setIsSigned(true); 669d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor X.setIsSigned(true); 679d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor } 689d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 699d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor return X == Y; 709d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor} 719d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor 72f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 73a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 74f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateParameterList *TemplateParams, 75f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor const TemplateArgument &Param, 76d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor const TemplateArgument &Arg, 77f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Sema::TemplateDeductionInfo &Info, 7802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced); 79d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor 80199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// \brief If the given expression is of a form that permits the deduction 81199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// of a non-type template parameter, return the declaration of that 82199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// non-type template parameter. 83199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregorstatic NonTypeTemplateParmDecl *getDeducedParameterFromExpr(Expr *E) { 84199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (ImplicitCastExpr *IC = dyn_cast<ImplicitCastExpr>(E)) 85199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor E = IC->getSubExpr(); 861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 88199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor return dyn_cast<NonTypeTemplateParmDecl>(DRE->getDecl()); 891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 90199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor return 0; 91199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor} 92199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Deduce the value of the given non-type template parameter 94199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// from the given constant. 95f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 96a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceNonTypeTemplateArgument(Sema &S, 971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump NonTypeTemplateParmDecl *NTTP, 989d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor llvm::APSInt Value, QualType ValueType, 9902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor bool DeducedFromArrayBound, 100f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Sema::TemplateDeductionInfo &Info, 10102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 1021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(NTTP->getDepth() == 0 && 103199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Cannot deduce non-type template argument with depth > 0"); 1041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 105199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Deduced[NTTP->getIndex()].isNull()) { 10602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Deduced[NTTP->getIndex()] = DeducedTemplateArgument(Value, ValueType, 10702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor DeducedFromArrayBound); 108f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 109199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 1101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1119d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if (Deduced[NTTP->getIndex()].getKind() != TemplateArgument::Integral) { 112f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.Param = NTTP; 113f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Deduced[NTTP->getIndex()]; 1149d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Info.SecondArg = TemplateArgument(Value, ValueType); 1159d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor return Sema::TDK_Inconsistent; 116f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 117f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 1189d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor // Extent the smaller of the two values. 1199d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor llvm::APSInt PrevValue = *Deduced[NTTP->getIndex()].getAsIntegral(); 1209d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if (!hasSameExtendedValue(PrevValue, Value)) { 121f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.Param = NTTP; 122f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Deduced[NTTP->getIndex()]; 1239d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Info.SecondArg = TemplateArgument(Value, ValueType); 124f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Inconsistent; 125f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 126f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 12702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor if (!DeducedFromArrayBound) 12802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Deduced[NTTP->getIndex()].setDeducedFromArrayBound(false); 12902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 130f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 131199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor} 132199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 1331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Deduce the value of the given non-type template parameter 134199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// from the given type- or value-dependent expression. 135199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// 136199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor/// \returns true if deduction succeeded, false otherwise. 137f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 138a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceNonTypeTemplateArgument(Sema &S, 139f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor NonTypeTemplateParmDecl *NTTP, 140f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Expr *Value, 141f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Sema::TemplateDeductionInfo &Info, 14202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 1431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(NTTP->getDepth() == 0 && 144199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Cannot deduce non-type template argument with depth > 0"); 145199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor assert((Value->isTypeDependent() || Value->isValueDependent()) && 146199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Expression template argument must be type- or value-dependent."); 1471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 148199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Deduced[NTTP->getIndex()].isNull()) { 1499d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Deduced[NTTP->getIndex()] = TemplateArgument(Value->Retain()); 150f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 151199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 1521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 153199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Deduced[NTTP->getIndex()].getKind() == TemplateArgument::Integral) { 1541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Okay, we deduced a constant in one case and a dependent expression 1551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // in another case. FIXME: Later, we will check that instantiating the 156199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // dependent expression gives us the constant value. 157f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 158199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 1591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1609eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor if (Deduced[NTTP->getIndex()].getKind() == TemplateArgument::Expression) { 1619eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor // Compare the expressions for equality 1629eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor llvm::FoldingSetNodeID ID1, ID2; 163a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth Deduced[NTTP->getIndex()].getAsExpr()->Profile(ID1, S.Context, true); 164a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth Value->Profile(ID2, S.Context, true); 1659eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor if (ID1 == ID2) 1669eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor return Sema::TDK_Success; 1679eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor 1689eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor // FIXME: Fill in argument mismatch information 1699eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor return Sema::TDK_NonDeducedMismatch; 1709eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor } 1719eea08ba72f8b1e7faf38e43376b9157fc4a2af2Douglas Gregor 172f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 173199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor} 174199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 17515755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// \brief Deduce the value of the given non-type template parameter 17615755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// from the given declaration. 17715755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// 17815755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor/// \returns true if deduction succeeded, false otherwise. 17915755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregorstatic Sema::TemplateDeductionResult 180a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceNonTypeTemplateArgument(Sema &S, 18115755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor NonTypeTemplateParmDecl *NTTP, 18215755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor Decl *D, 18315755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor Sema::TemplateDeductionInfo &Info, 18402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 18515755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor assert(NTTP->getDepth() == 0 && 18615755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor "Cannot deduce non-type template argument with depth > 0"); 18715755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 18815755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor if (Deduced[NTTP->getIndex()].isNull()) { 18915755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor Deduced[NTTP->getIndex()] = TemplateArgument(D->getCanonicalDecl()); 19015755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor return Sema::TDK_Success; 19115755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor } 19215755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 19315755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor if (Deduced[NTTP->getIndex()].getKind() == TemplateArgument::Expression) { 19415755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor // Okay, we deduced a declaration in one case and a dependent expression 19515755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor // in another case. 19615755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor return Sema::TDK_Success; 19715755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor } 19815755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 19915755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor if (Deduced[NTTP->getIndex()].getKind() == TemplateArgument::Declaration) { 20015755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor // Compare the declarations for equality 20115755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor if (Deduced[NTTP->getIndex()].getAsDecl()->getCanonicalDecl() == 20215755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor D->getCanonicalDecl()) 20315755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor return Sema::TDK_Success; 20415755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 20515755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor // FIXME: Fill in argument mismatch information 20615755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor return Sema::TDK_NonDeducedMismatch; 20715755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor } 20815755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 20915755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor return Sema::TDK_Success; 21015755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor} 21115755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 212f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 213a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 214db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor TemplateParameterList *TemplateParams, 215f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateName Param, 216f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateName Arg, 217f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Sema::TemplateDeductionInfo &Info, 21802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 219d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor TemplateDecl *ParamDecl = Param.getAsTemplateDecl(); 220db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor if (!ParamDecl) { 221db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // The parameter type is dependent and is not a template template parameter, 222db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // so there is nothing that we can deduce. 223db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_Success; 224f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 225db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor 226db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor if (TemplateTemplateParmDecl *TempParam 227db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor = dyn_cast<TemplateTemplateParmDecl>(ParamDecl)) { 228db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // Bind the template template parameter to the given template name. 229db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor TemplateArgument &ExistingArg = Deduced[TempParam->getIndex()]; 230db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor if (ExistingArg.isNull()) { 231db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // This is the first deduction for this template template parameter. 232a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth ExistingArg = TemplateArgument(S.Context.getCanonicalTemplateName(Arg)); 233db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_Success; 234db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor } 235db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor 236db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // Verify that the previous binding matches this deduction. 237db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor assert(ExistingArg.getKind() == TemplateArgument::Template); 238a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (S.Context.hasSameTemplateName(ExistingArg.getAsTemplate(), Arg)) 239db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_Success; 240db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor 241db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // Inconsistent deduction. 242db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Info.Param = TempParam; 243db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Info.FirstArg = ExistingArg; 244db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Info.SecondArg = TemplateArgument(Arg); 245f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Inconsistent; 246f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 247db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor 248db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // Verify that the two template names are equivalent. 249a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (S.Context.hasSameTemplateName(Param, Arg)) 250db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_Success; 251db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor 252db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // Mismatch of non-dependent template parameter to argument. 253db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Info.FirstArg = TemplateArgument(Param); 254db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Info.SecondArg = TemplateArgument(Arg); 255db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor return Sema::TDK_NonDeducedMismatch; 256d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor} 257d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor 2581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Deduce the template arguments by comparing the template parameter 259de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// type (which is a template-id) with the template argument type. 260de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 261a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth/// \param S the Sema 262de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 263de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param TemplateParams the template parameters that we are deducing 264de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 265de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Param the parameter type 266de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 267de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Arg the argument type 268de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 269de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Info information about the template argument deduction itself 270de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 271de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \param Deduced the deduced template arguments 272de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// 273de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// \returns the result of template argument deduction so far. Note that a 274de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// "success" result means that template argument deduction has not yet failed, 275de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor/// but it may still fail, later, for other reasons. 276de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregorstatic Sema::TemplateDeductionResult 277a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 278de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor TemplateParameterList *TemplateParams, 279de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor const TemplateSpecializationType *Param, 280de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor QualType Arg, 281de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Sema::TemplateDeductionInfo &Info, 28202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 283467b27b9a24bdc823218ad1ad0e37673b6cc1e83John McCall assert(Arg.isCanonical() && "Argument type must be canonical"); 2841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 285de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Check whether the template argument is a dependent template-id. 2861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const TemplateSpecializationType *SpecArg 287de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor = dyn_cast<TemplateSpecializationType>(Arg)) { 288de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Perform template argument deduction for the template name. 289de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (Sema::TemplateDeductionResult Result 290a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 291de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Param->getTemplateName(), 292de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor SpecArg->getTemplateName(), 293de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced)) 294de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 2951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 297de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Perform template argument deduction on each template 298de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // argument. 299db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor unsigned NumArgs = std::min(SpecArg->getNumArgs(), Param->getNumArgs()); 300de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor for (unsigned I = 0; I != NumArgs; ++I) 301de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (Sema::TemplateDeductionResult Result 302a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 303de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Param->getArg(I), 304de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor SpecArg->getArg(I), 305de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced)) 306de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 3071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 308de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_Success; 309de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 3101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 311de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If the argument type is a class template specialization, we 312de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // perform template argument deduction using its template 313de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // arguments. 314de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor const RecordType *RecordArg = dyn_cast<RecordType>(Arg); 315de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (!RecordArg) 316de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_NonDeducedMismatch; 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ClassTemplateSpecializationDecl *SpecArg 319de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor = dyn_cast<ClassTemplateSpecializationDecl>(RecordArg->getDecl()); 320de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (!SpecArg) 321de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_NonDeducedMismatch; 3221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 323de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Perform template argument deduction for the template name. 324de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (Sema::TemplateDeductionResult Result 325a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, 326db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor TemplateParams, 327de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Param->getTemplateName(), 328de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor TemplateName(SpecArg->getSpecializedTemplate()), 329de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced)) 330de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 3311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 332de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor unsigned NumArgs = Param->getNumArgs(); 333de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor const TemplateArgumentList &ArgArgs = SpecArg->getTemplateArgs(); 334de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (NumArgs != ArgArgs.size()) 335de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_NonDeducedMismatch; 3361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 337de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor for (unsigned I = 0; I != NumArgs; ++I) 3381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (Sema::TemplateDeductionResult Result 339a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 340de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Param->getArg(I), 341de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor ArgArgs.get(I), 342de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced)) 343de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 3441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 345de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_Success; 346de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor} 347de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor 348500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \brief Deduce the template arguments by comparing the parameter type and 349500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// the argument type (C++ [temp.deduct.type]). 350500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 351a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth/// \param S the semantic analysis object within which we are deducing 352500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 353500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param TemplateParams the template parameters that we are deducing 354500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 355500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param ParamIn the parameter type 356500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 357500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param ArgIn the argument type 358500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 359500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param Info information about the template argument deduction itself 360500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 361500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \param Deduced the deduced template arguments 362500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 363508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor/// \param TDF bitwise OR of the TemplateDeductionFlags bits that describe 3641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// how template argument deduction is performed. 365500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// 366500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// \returns the result of template argument deduction so far. Note that a 367500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// "success" result means that template argument deduction has not yet failed, 368500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor/// but it may still fail, later, for other reasons. 369f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 370a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 371f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateParameterList *TemplateParams, 372f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor QualType ParamIn, QualType ArgIn, 373f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Sema::TemplateDeductionInfo &Info, 37402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 375508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor unsigned TDF) { 3760b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // We only want to look at the canonical types, since typedefs and 3770b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // sugar are not part of template argument deduction. 378a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth QualType Param = S.Context.getCanonicalType(ParamIn); 379a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth QualType Arg = S.Context.getCanonicalType(ArgIn); 3800b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 381500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor // C++0x [temp.deduct.call]p4 bullet 1: 382500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor // - If the original P is a reference type, the deduced A (i.e., the type 3831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // referred to by the reference) can be more cv-qualified than the 384500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor // transformed A. 385508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (TDF & TDF_ParamWithReferenceType) { 386e724246b9f655801bd96b727daf9dddc44beef4dChandler Carruth Qualifiers Quals; 387a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth QualType UnqualParam = S.Context.getUnqualifiedArrayType(Param, Quals); 388e724246b9f655801bd96b727daf9dddc44beef4dChandler Carruth Quals.setCVRQualifiers(Quals.getCVRQualifiers() & 389e724246b9f655801bd96b727daf9dddc44beef4dChandler Carruth Arg.getCVRQualifiersThroughArrayTypes()); 390a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth Param = S.Context.getQualifiedType(UnqualParam, Quals); 391500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor } 3921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 393f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor // If the parameter type is not dependent, there is nothing to deduce. 3941282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor if (!Param->isDependentType()) { 3951282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor if (!(TDF & TDF_SkipNonDependent) && Param != Arg) { 3961282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor 3971282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor return Sema::TDK_NonDeducedMismatch; 3981282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor } 3991282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor 400f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return Sema::TDK_Success; 4011282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor } 4020b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 403199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // C++ [temp.deduct.type]p9: 4041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // A template type argument T, a template template argument TT or a 4051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // template non-type argument i can be deduced if P and A have one of 406199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // the following forms: 407199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // 408199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T 409199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // cv-list T 4101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const TemplateTypeParmType *TemplateTypeParm 411183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall = Param->getAs<TemplateTypeParmType>()) { 412f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor unsigned Index = TemplateTypeParm->getIndex(); 413f290e0db835a619014538c41ed552696efc0e977Douglas Gregor bool RecanonicalizeArg = false; 4141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4159e9fae4b8af47c15696da4ea3c30102e3a035179Douglas Gregor // If the argument type is an array type, move the qualifiers up to the 4169e9fae4b8af47c15696da4ea3c30102e3a035179Douglas Gregor // top level, so they can be matched with the qualifiers on the parameter. 4179e9fae4b8af47c15696da4ea3c30102e3a035179Douglas Gregor // FIXME: address spaces, ObjC GC qualifiers 418f290e0db835a619014538c41ed552696efc0e977Douglas Gregor if (isa<ArrayType>(Arg)) { 4190953e767ff7817f97b3ab20896b229891eeff45bJohn McCall Qualifiers Quals; 420a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth Arg = S.Context.getUnqualifiedArrayType(Arg, Quals); 4210953e767ff7817f97b3ab20896b229891eeff45bJohn McCall if (Quals) { 422a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth Arg = S.Context.getQualifiedType(Arg, Quals); 423f290e0db835a619014538c41ed552696efc0e977Douglas Gregor RecanonicalizeArg = true; 424f290e0db835a619014538c41ed552696efc0e977Douglas Gregor } 425f290e0db835a619014538c41ed552696efc0e977Douglas Gregor } 4261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4270b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // The argument type can not be less qualified than the parameter 4280b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // type. 429508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (Param.isMoreQualifiedThan(Arg) && !(TDF & TDF_IgnoreQualifiers)) { 430f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.Param = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); 431f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Deduced[Index]; 432833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.SecondArg = TemplateArgument(Arg); 433f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_InconsistentQuals; 434f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 4350b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 4360b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor assert(TemplateTypeParm->getDepth() == 0 && "Can't deduce with depth > 0"); 437a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth assert(Arg != S.Context.OverloadTy && "Unresolved overloaded function"); 4380953e767ff7817f97b3ab20896b229891eeff45bJohn McCall QualType DeducedType = Arg; 4390953e767ff7817f97b3ab20896b229891eeff45bJohn McCall DeducedType.removeCVRQualifiers(Param.getCVRQualifiers()); 440f290e0db835a619014538c41ed552696efc0e977Douglas Gregor if (RecanonicalizeArg) 441a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth DeducedType = S.Context.getCanonicalType(DeducedType); 4421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4430b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor if (Deduced[Index].isNull()) 444833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Deduced[Index] = TemplateArgument(DeducedType); 4450b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor else { 4461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // C++ [temp.deduct.type]p2: 4470b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // [...] If type deduction cannot be done for any P/A pair, or if for 4481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // any pair the deduction leads to more than one possible set of 4491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // deduced values, or if different pairs yield different deduced 4501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // values, or if any template argument remains neither deduced nor 4510b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // explicitly specified, template argument deduction fails. 452f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Deduced[Index].getAsType() != DeducedType) { 4531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Info.Param 454f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor = cast<TemplateTypeParmDecl>(TemplateParams->getParam(Index)); 455f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Deduced[Index]; 456833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.SecondArg = TemplateArgument(Arg); 457f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Inconsistent; 458f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 4590b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 460f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 4610b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 4620b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 463f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor // Set up the template argument deduction information for a failure. 464833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.FirstArg = TemplateArgument(ParamIn); 465833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.SecondArg = TemplateArgument(ArgIn); 466f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 467508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor // Check the cv-qualifiers on the parameter and argument types. 468508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (!(TDF & TDF_IgnoreQualifiers)) { 469508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (TDF & TDF_ParamWithReferenceType) { 470508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (Param.isMoreQualifiedThan(Arg)) 471508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor return Sema::TDK_NonDeducedMismatch; 472508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor } else { 473508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (Param.getCVRQualifiers() != Arg.getCVRQualifiers()) 4741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Sema::TDK_NonDeducedMismatch; 475508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor } 476508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor } 4770b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 478d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor switch (Param->getTypeClass()) { 479199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // No deduction possible for these types 480199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case Type::Builtin: 481f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 4821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 483199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T * 484d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor case Type::Pointer: { 4856217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const PointerType *PointerArg = Arg->getAs<PointerType>(); 486d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor if (!PointerArg) 487f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 4881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4894112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor unsigned SubTDF = TDF & (TDF_IgnoreQualifiers | TDF_DerivedClass); 490a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 491d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor cast<PointerType>(Param)->getPointeeType(), 492d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor PointerArg->getPointeeType(), 4934112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor Info, Deduced, SubTDF); 494d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor } 4951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 496199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T & 497d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor case Type::LValueReference: { 4986217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const LValueReferenceType *ReferenceArg = Arg->getAs<LValueReferenceType>(); 499d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor if (!ReferenceArg) 500f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 5011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 502a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 503d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor cast<LValueReferenceType>(Param)->getPointeeType(), 504d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor ReferenceArg->getPointeeType(), 505508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0); 506d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor } 5070b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 508199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T && [C++0x] 509d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor case Type::RValueReference: { 5106217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const RValueReferenceType *ReferenceArg = Arg->getAs<RValueReferenceType>(); 511d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor if (!ReferenceArg) 512f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 5131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 514a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 515d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor cast<RValueReferenceType>(Param)->getPointeeType(), 516d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor ReferenceArg->getPointeeType(), 517508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0); 518d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor } 5191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 520199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T [] (implied, but not stated explicitly) 5214d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson case Type::IncompleteArray: { 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const IncompleteArrayType *IncompleteArrayArg = 523a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth S.Context.getAsIncompleteArrayType(Arg); 5244d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson if (!IncompleteArrayArg) 525f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 5261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 527a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 528a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth S.Context.getAsIncompleteArrayType(Param)->getElementType(), 5294d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson IncompleteArrayArg->getElementType(), 530508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0); 5314d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson } 532199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 533199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // T [integer-constant] 5344d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson case Type::ConstantArray: { 5351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ConstantArrayType *ConstantArrayArg = 536a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth S.Context.getAsConstantArrayType(Arg); 5374d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson if (!ConstantArrayArg) 538f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const ConstantArrayType *ConstantArrayParm = 541a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth S.Context.getAsConstantArrayType(Param); 5424d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson if (ConstantArrayArg->getSize() != ConstantArrayParm->getSize()) 543f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 5441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 545a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 5464d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson ConstantArrayParm->getElementType(), 5474d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson ConstantArrayArg->getElementType(), 548508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0); 5494d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson } 5504d6fb501ffc0568ca5ca7266005e96a6f1273845Anders Carlsson 551199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // type [i] 552199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case Type::DependentSizedArray: { 553a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth const ArrayType *ArrayArg = S.Context.getAsArrayType(Arg); 554199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (!ArrayArg) 555f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 5561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 557199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Check the element type of the arrays 558199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor const DependentSizedArrayType *DependentArrayParm 559a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = S.Context.getAsDependentSizedArrayType(Param); 560f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 561a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 562f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor DependentArrayParm->getElementType(), 563f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor ArrayArg->getElementType(), 564508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0)) 565f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 5661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 567199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Determine the array bound is something we can deduce. 5681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump NonTypeTemplateParmDecl *NTTP 569199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor = getDeducedParameterFromExpr(DependentArrayParm->getSizeExpr()); 570199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (!NTTP) 571f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 5721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // We can perform template argument deduction for the given non-type 574199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // template parameter. 5751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(NTTP->getDepth() == 0 && 576199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor "Cannot deduce non-type template argument at depth > 0"); 5771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const ConstantArrayType *ConstantArrayArg 578335e24a194f2000086d298b800d6169ebc5a7ee6Anders Carlsson = dyn_cast<ConstantArrayType>(ArrayArg)) { 579335e24a194f2000086d298b800d6169ebc5a7ee6Anders Carlsson llvm::APSInt Size(ConstantArrayArg->getSize()); 5809d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor return DeduceNonTypeTemplateArgument(S, NTTP, Size, 5819d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor S.Context.getSizeType(), 58202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor /*ArrayBound=*/true, 583f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced); 584335e24a194f2000086d298b800d6169ebc5a7ee6Anders Carlsson } 585199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (const DependentSizedArrayType *DependentArrayArg 586199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor = dyn_cast<DependentSizedArrayType>(ArrayArg)) 587a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceNonTypeTemplateArgument(S, NTTP, 588199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor DependentArrayArg->getSizeExpr(), 589f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced); 5901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 591199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Incomplete type does not match a dependently-sized array type 592f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 593199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 5941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // type(*)(T) 5961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(*)() 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(*)(T) 598a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson case Type::FunctionProto: { 5991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const FunctionProtoType *FunctionProtoArg = 600a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson dyn_cast<FunctionProtoType>(Arg); 601a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson if (!FunctionProtoArg) 602f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 6031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const FunctionProtoType *FunctionProtoParam = 605a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson cast<FunctionProtoType>(Param); 606994b6cb65c9daba2128366bc4c64be6dbf953528Anders Carlsson 6071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (FunctionProtoParam->getTypeQuals() != 608994b6cb65c9daba2128366bc4c64be6dbf953528Anders Carlsson FunctionProtoArg->getTypeQuals()) 609f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 611994b6cb65c9daba2128366bc4c64be6dbf953528Anders Carlsson if (FunctionProtoParam->getNumArgs() != FunctionProtoArg->getNumArgs()) 612f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 6131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 614994b6cb65c9daba2128366bc4c64be6dbf953528Anders Carlsson if (FunctionProtoParam->isVariadic() != FunctionProtoArg->isVariadic()) 615f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 616994b6cb65c9daba2128366bc4c64be6dbf953528Anders Carlsson 617a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson // Check return types. 618f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 619a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 620f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor FunctionProtoParam->getResultType(), 621f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor FunctionProtoArg->getResultType(), 622508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0)) 623f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 625a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson for (unsigned I = 0, N = FunctionProtoParam->getNumArgs(); I != N; ++I) { 626a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson // Check argument types. 627f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 628a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 629f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor FunctionProtoParam->getArgType(I), 630f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor FunctionProtoArg->getArgType(I), 631508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0)) 632f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 633a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson } 6341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 635f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 636a27fad59dc760252af025ef6a86d31bb7d11a44aAnders Carlsson } 6371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6383cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall case Type::InjectedClassName: { 6393cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall // Treat a template's injected-class-name as if the template 6403cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall // specialization type had been used. 64131f17ecbef57b5679c017c375db330546b7b5145John McCall Param = cast<InjectedClassNameType>(Param) 64231f17ecbef57b5679c017c375db330546b7b5145John McCall ->getInjectedSpecializationType(); 6433cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall assert(isa<TemplateSpecializationType>(Param) && 6443cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall "injected class name is not a template specialization type"); 6453cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall // fall through 6463cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall } 6473cb0ebd5f76abcb776f7cb4062bd79e3268c0dc4John McCall 648f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor // template-name<T> (where template-name refers to a class template) 649d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor // template-name<i> 650db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // TT<T> 651db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // TT<i> 652db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor // TT<> 653d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor case Type::TemplateSpecialization: { 654d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor const TemplateSpecializationType *SpecParam 655d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor = cast<TemplateSpecializationType>(Param); 6561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 657de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Try to deduce template arguments from the template-id. 658de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Sema::TemplateDeductionResult Result 659a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, SpecParam, Arg, 660de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Info, Deduced); 6611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6624a5c15f75f76b95e1c2ceb6fa2737dcadd5f4be1Douglas Gregor if (Result && (TDF & TDF_DerivedClass)) { 663de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // C++ [temp.deduct.call]p3b3: 664de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If P is a class, and P has the form template-id, then A can be a 665de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // derived class of the deduced A. Likewise, if P is a pointer to a 6661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // class of the form template-id, A can be a pointer to a derived 667de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // class pointed to by the deduced A. 668de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // 669de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // More importantly: 6701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // These alternatives are considered only if type deduction would 671de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // otherwise fail. 672a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (const RecordType *RecordT = Arg->getAs<RecordType>()) { 673a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth // We cannot inspect base classes as part of deduction when the type 674a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth // is incomplete, so either instantiate any templates necessary to 675a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth // complete the type, or skip over it if it cannot be completed. 6765769d6195087229770d7ac90449443e026c47103John McCall if (S.RequireCompleteType(Info.getLocation(), Arg, 0)) 677a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return Result; 678a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth 679de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Use data recursion to crawl through the list of base classes. 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Visited contains the set of nodes we have already visited, while 681de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // ToVisit is our stack of records that we still need to visit. 682de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor llvm::SmallPtrSet<const RecordType *, 8> Visited; 683de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor llvm::SmallVector<const RecordType *, 8> ToVisit; 684de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor ToVisit.push_back(RecordT); 685de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor bool Successful = false; 686de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor while (!ToVisit.empty()) { 687de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Retrieve the next class in the inheritance hierarchy. 688de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor const RecordType *NextT = ToVisit.back(); 689de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor ToVisit.pop_back(); 6901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 691de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If we have already seen this type, skip it. 692de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (!Visited.insert(NextT)) 693de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor continue; 6941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 695de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If this is a base class, try to perform template argument 696de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // deduction from it. 697de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (NextT != RecordT) { 698de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Sema::TemplateDeductionResult BaseResult 699a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, SpecParam, 700de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor QualType(NextT, 0), Info, Deduced); 7011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 702de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // If template argument deduction for this base was successful, 703de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // note that we had some success. 704de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (BaseResult == Sema::TDK_Success) 705de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor Successful = true; 706de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 7071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 708de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor // Visit base classes 709de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor CXXRecordDecl *Next = cast<CXXRecordDecl>(NextT->getDecl()); 710de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor for (CXXRecordDecl::base_class_iterator Base = Next->bases_begin(), 711de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor BaseEnd = Next->bases_end(); 7129994a34f6cf842721ba7723edc0b9036229fe387Sebastian Redl Base != BaseEnd; ++Base) { 7131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(Base->getType()->isRecordType() && 714de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor "Base class that isn't a record?"); 7156217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek ToVisit.push_back(Base->getType()->getAs<RecordType>()); 716de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 717de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 7181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 719de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor if (Successful) 720de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Sema::TDK_Success; 721de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 7221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 723de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor } 7241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 725de0cb8b6c15c756e14b0716bebd40f4ce48ee717Douglas Gregor return Result; 726d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor } 727d708c72e3e5186662fb0045d2bd666bfd93a013dDouglas Gregor 728637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T type::* 729637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T T::* 730637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (type::*)() 731637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // type (T::*)() 732637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // type (type::*)(T) 733637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // type (T::*)(T) 734637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (type::*)(T) 735637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (T::*)() 736637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // T (T::*)(T) 737637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor case Type::MemberPointer: { 738637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor const MemberPointerType *MemPtrParam = cast<MemberPointerType>(Param); 739637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor const MemberPointerType *MemPtrArg = dyn_cast<MemberPointerType>(Arg); 740637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor if (!MemPtrArg) 741f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 742f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 743f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 744a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 745f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor MemPtrParam->getPointeeType(), 746f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor MemPtrArg->getPointeeType(), 747508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 748508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF & TDF_IgnoreQualifiers)) 749f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 750f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 751a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 752f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor QualType(MemPtrParam->getClass(), 0), 753f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor QualType(MemPtrArg->getClass(), 0), 754508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Info, Deduced, 0); 755637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor } 756637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor 7579a917e4fac79aba20fbd25983c78396475078918Anders Carlsson // (clang extension) 7589a917e4fac79aba20fbd25983c78396475078918Anders Carlsson // 7591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // type(^)(T) 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(^)() 7611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // T(^)(T) 762859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson case Type::BlockPointer: { 763859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson const BlockPointerType *BlockPtrParam = cast<BlockPointerType>(Param); 764859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson const BlockPointerType *BlockPtrArg = dyn_cast<BlockPointerType>(Arg); 7651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 766859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson if (!BlockPtrArg) 767f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 7681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 769a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 770859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson BlockPtrParam->getPointeeType(), 771f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor BlockPtrArg->getPointeeType(), Info, 772508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor Deduced, 0); 773859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson } 774859ba504e754436e1ccf81f50800e5d2ea647447Anders Carlsson 775637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor case Type::TypeOfExpr: 776637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor case Type::TypeOf: 7774714c12a1ab759156b78be8f109ea4c12213af57Douglas Gregor case Type::DependentName: 778637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor // No template argument deduction for these types 779f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 780637a4097f61b09d6ccf619298d9d121fafa044e4Douglas Gregor 781d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor default: 782d560d5025a0e5b1942d99d5f39005337b03a64c2Douglas Gregor break; 7830b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 7840b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 7850b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor // FIXME: Many more cases to go (to go). 786f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return Sema::TDK_Success; 7870b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 7880b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 789f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregorstatic Sema::TemplateDeductionResult 790a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 791f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateParameterList *TemplateParams, 792f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor const TemplateArgument &Param, 7930b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor const TemplateArgument &Arg, 794f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Sema::TemplateDeductionInfo &Info, 79502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 7960b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor switch (Param.getKind()) { 797199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Null: 798199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor assert(false && "Null template argument in parameter list"); 799199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor break; 8001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case TemplateArgument::Type: 802788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor if (Arg.getKind() == TemplateArgument::Type) 803a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, Param.getAsType(), 804788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Arg.getAsType(), Info, Deduced, 0); 805788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.FirstArg = Param; 806788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.SecondArg = Arg; 807788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return Sema::TDK_NonDeducedMismatch; 808788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor 809788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Template: 810db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor if (Arg.getKind() == TemplateArgument::Template) 811a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, 812788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Param.getAsTemplate(), 813db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Arg.getAsTemplate(), Info, Deduced); 814788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.FirstArg = Param; 815788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Info.SecondArg = Arg; 816788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return Sema::TDK_NonDeducedMismatch; 817788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor 818199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Declaration: 819788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor if (Arg.getKind() == TemplateArgument::Declaration && 820788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Param.getAsDecl()->getCanonicalDecl() == 821788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Arg.getAsDecl()->getCanonicalDecl()) 822788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return Sema::TDK_Success; 823788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor 824f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 825f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 826f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 8271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 828199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Integral: 829199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Arg.getKind() == TemplateArgument::Integral) { 8309d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor if (hasSameExtendedValue(*Param.getAsIntegral(), *Arg.getAsIntegral())) 831f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 832f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 833f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 834f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 835f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 836f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 837f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor 838f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Arg.getKind() == TemplateArgument::Expression) { 839f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 840f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 841f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 842199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 843199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor 844199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor assert(false && "Type/value mismatch"); 845f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 846f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 847f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 8481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 849199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor case TemplateArgument::Expression: { 8501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (NonTypeTemplateParmDecl *NTTP 851199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor = getDeducedParameterFromExpr(Param.getAsExpr())) { 852199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Arg.getKind() == TemplateArgument::Integral) 853a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceNonTypeTemplateArgument(S, NTTP, 8541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump *Arg.getAsIntegral(), 8559d0e441036de0faa59d8039ce0c9967bda112c7fDouglas Gregor Arg.getIntegralType(), 85602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor /*ArrayBound=*/false, 857f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced); 858199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor if (Arg.getKind() == TemplateArgument::Expression) 859a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceNonTypeTemplateArgument(S, NTTP, Arg.getAsExpr(), 860f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced); 86115755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor if (Arg.getKind() == TemplateArgument::Declaration) 862a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceNonTypeTemplateArgument(S, NTTP, Arg.getAsDecl(), 86315755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor Info, Deduced); 86415755cb8399afa702575a21915daf2f6e56b5ac1Douglas Gregor 865199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor assert(false && "Type/value mismatch"); 866f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.FirstArg = Param; 867f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.SecondArg = Arg; 868f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_NonDeducedMismatch; 869199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 8701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 871199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor // Can't deduce anything, but that's okay. 872f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 873199d99192fbcca9f043596c40ead4afab4999dbaDouglas Gregor } 874d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson case TemplateArgument::Pack: 875d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson assert(0 && "FIXME: Implement!"); 876d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson break; 8770b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 8781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 879f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 8800b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 8810b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 8821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic Sema::TemplateDeductionResult 883a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArguments(Sema &S, 884f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor TemplateParameterList *TemplateParams, 8850b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor const TemplateArgumentList &ParamList, 8860b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor const TemplateArgumentList &ArgList, 887f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Sema::TemplateDeductionInfo &Info, 88802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced) { 8890b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor assert(ParamList.size() == ArgList.size()); 8900b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor for (unsigned I = 0, N = ParamList.size(); I != N; ++I) { 891f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Sema::TemplateDeductionResult Result 892a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 8931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump ParamList[I], ArgList[I], 894f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info, Deduced)) 895f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Result; 8960b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor } 897f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor return Sema::TDK_Success; 8980b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 8990b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor 900f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor/// \brief Determine whether two template arguments are the same. 9011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic bool isSameTemplateArg(ASTContext &Context, 902f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor const TemplateArgument &X, 903f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor const TemplateArgument &Y) { 904f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (X.getKind() != Y.getKind()) 905f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return false; 9061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 907f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor switch (X.getKind()) { 908f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Null: 909f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor assert(false && "Comparing NULL template argument"); 910f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor break; 9111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 912f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Type: 913f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return Context.getCanonicalType(X.getAsType()) == 914f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Context.getCanonicalType(Y.getAsType()); 9151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 916f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Declaration: 91797fbaa2a38804268a024f1a104b43fcf8b4411b0Argyrios Kyrtzidis return X.getAsDecl()->getCanonicalDecl() == 91897fbaa2a38804268a024f1a104b43fcf8b4411b0Argyrios Kyrtzidis Y.getAsDecl()->getCanonicalDecl(); 9191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 920788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Template: 921788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return Context.getCanonicalTemplateName(X.getAsTemplate()) 922788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor .getAsVoidPointer() == 923788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Context.getCanonicalTemplateName(Y.getAsTemplate()) 924788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor .getAsVoidPointer(); 925788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor 926f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Integral: 927f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return *X.getAsIntegral() == *Y.getAsIntegral(); 9281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 929788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Expression: { 930788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor llvm::FoldingSetNodeID XID, YID; 931788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor X.getAsExpr()->Profile(XID, Context, true); 932788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Y.getAsExpr()->Profile(YID, Context, true); 933788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor return XID == YID; 934788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor } 9351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 936f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor case TemplateArgument::Pack: 937f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (X.pack_size() != Y.pack_size()) 938f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return false; 9391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump for (TemplateArgument::pack_iterator XP = X.pack_begin(), 9411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump XPEnd = X.pack_end(), 942f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor YP = Y.pack_begin(); 9431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump XP != XPEnd; ++XP, ++YP) 944f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (!isSameTemplateArg(Context, *XP, *YP)) 945f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return false; 946f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor 947f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return true; 948f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor } 949f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor 950f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return false; 951f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor} 952f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor 953f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor/// \brief Helper function to build a TemplateParameter when we don't 954f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor/// know its type statically. 955f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregorstatic TemplateParameter makeTemplateParameter(Decl *D) { 956f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(D)) 957f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return TemplateParameter(TTP); 958f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor else if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(D)) 959f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return TemplateParameter(NTTP); 9601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 961f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor return TemplateParameter(cast<TemplateTemplateParmDecl>(D)); 962f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor} 963f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor 96431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// Complete template argument deduction for a class template partial 96531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// specialization. 96631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregorstatic Sema::TemplateDeductionResult 96731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas GregorFinishTemplateArgumentDeduction(Sema &S, 96831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor ClassTemplatePartialSpecializationDecl *Partial, 96931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor const TemplateArgumentList &TemplateArgs, 97031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 97131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Sema::TemplateDeductionInfo &Info) { 97231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // Trap errors. 97331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Sema::SFINAETrap Trap(S); 97431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 97531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Sema::ContextRAII SavedContext(S, Partial); 976f5813826802c2e76cdc13cae834ebfd4518d74a6John McCall 97702cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // C++ [temp.deduct.type]p2: 97802cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // [...] or if any template argument remains neither deduced nor 97902cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // explicitly specified, template argument deduction fails. 980fb25052736439d72a557cddd41dfb927bcb3d3e5Anders Carlsson TemplateArgumentListBuilder Builder(Partial->getTemplateParameters(), 981fb25052736439d72a557cddd41dfb927bcb3d3e5Anders Carlsson Deduced.size()); 98202cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor for (unsigned I = 0, N = Deduced.size(); I != N; ++I) { 983f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor if (Deduced[I].isNull()) { 9841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Decl *Param 98531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor = const_cast<NamedDecl *>( 986bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Partial->getTemplateParameters()->getParam(I)); 9872b0749a4f8965d0205bf77322db150c13c39e3beDouglas Gregor Info.Param = makeTemplateParameter(Param); 98831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_Incomplete; 989f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 99031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 991fb25052736439d72a557cddd41dfb927bcb3d3e5Anders Carlsson Builder.Append(Deduced[I]); 99202cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor } 99331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 99402cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // Form the template argument list from the deduced template arguments. 9951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateArgumentList *DeducedArgumentList 99631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor = new (S.Context) TemplateArgumentList(S.Context, Builder, 99731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor /*TakeArgs=*/true); 998f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor Info.reset(DeducedArgumentList); 99902cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor 100002cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // Substitute the deduced template arguments into the template 100102cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // arguments of the class template partial specialization, and 100202cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // verify that the instantiated template arguments are both valid 100302cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor // and are equivalent to the template arguments originally provided 10041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to the class template. 100502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // FIXME: Do we have to correct the types of deduced non-type template 100602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // arguments (in particular, integral non-type template arguments?). 100731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Sema::LocalInstantiationScope InstScope(S); 100802cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor ClassTemplateDecl *ClassTemplate = Partial->getSpecializedTemplate(); 1009833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall const TemplateArgumentLoc *PartialTemplateArgs 1010833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall = Partial->getTemplateArgsAsWritten(); 1011833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall unsigned N = Partial->getNumTemplateArgsAsWritten(); 1012d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall 1013d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall // Note that we don't provide the langle and rangle locations. 1014d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall TemplateArgumentListInfo InstArgs; 1015d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall 1016833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall for (unsigned I = 0; I != N; ++I) { 1017bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Decl *Param = const_cast<NamedDecl *>( 1018c9e5d25ea33616c896a2ce5fbd6d68186eaddc5cDouglas Gregor ClassTemplate->getTemplateParameters()->getParam(I)); 1019d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall TemplateArgumentLoc InstArg; 102031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (S.Subst(PartialTemplateArgs[I], InstArg, 102131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor MultiLevelTemplateArgumentList(*DeducedArgumentList))) { 1022f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Info.Param = makeTemplateParameter(Param); 1023833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.FirstArg = PartialTemplateArgs[I].getArgument(); 102431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 1025f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor } 1026d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall InstArgs.addArgument(InstArg); 1027833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall } 1028833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall 1029833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall TemplateArgumentListBuilder ConvertedInstArgs( 1030833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall ClassTemplate->getTemplateParameters(), N); 1031833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall 103231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (S.CheckTemplateArgumentList(ClassTemplate, Partial->getLocation(), 1033d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall InstArgs, false, ConvertedInstArgs)) { 1034833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall // FIXME: fail with more useful information? 103531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 1036833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall } 1037833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall 1038833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall for (unsigned I = 0, E = ConvertedInstArgs.flatSize(); I != E; ++I) { 1039d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall TemplateArgument InstArg = ConvertedInstArgs.getFlatArguments()[I]; 1040833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall 1041833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Decl *Param = const_cast<NamedDecl *>( 1042833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall ClassTemplate->getTemplateParameters()->getParam(I)); 10431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1044f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor if (InstArg.getKind() == TemplateArgument::Expression) { 10451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // When the argument is an expression, check the expression result 1046f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor // against the actual template parameter to get down to the canonical 1047f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor // template argument. 1048f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Expr *InstExpr = InstArg.getAsExpr(); 10491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (NonTypeTemplateParmDecl *NTTP 1050f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor = dyn_cast<NonTypeTemplateParmDecl>(Param)) { 105131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (S.CheckTemplateArgument(NTTP, NTTP->getType(), InstExpr, InstArg)) { 1052f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Info.Param = makeTemplateParameter(Param); 1053833ca991c1bfc967f0995974ca86f66ba1f666b5John McCall Info.FirstArg = Partial->getTemplateArgs()[I]; 105431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 1055f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor } 1056f67875d5addf36b951ad37fb04509ab2b572c88aDouglas Gregor } 105702cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor } 10581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 105931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (!isSameTemplateArg(S.Context, TemplateArgs[I], InstArg)) { 1060f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Info.Param = makeTemplateParameter(Param); 1061f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Info.FirstArg = TemplateArgs[I]; 1062f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor Info.SecondArg = InstArg; 106331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_NonDeducedMismatch; 1064f670c8cfa58b4c224eb8fb566130dc47844dd3deDouglas Gregor } 106502cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor } 106602cbbd2d945e466174bee536758e5a2e6a1c0ea2Douglas Gregor 1067bb2604122f4186b6f666481f699b27c7e7a95790Douglas Gregor if (Trap.hasErrorOccurred()) 106831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 1069bb2604122f4186b6f666481f699b27c7e7a95790Douglas Gregor 107031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_Success; 107131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor} 107231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 107331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// \brief Perform template argument deduction to determine whether 107431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// the given template arguments match the given class template 107531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor/// partial specialization per C++ [temp.class.spec.match]. 107631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas GregorSema::TemplateDeductionResult 107731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas GregorSema::DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 107831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor const TemplateArgumentList &TemplateArgs, 107931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor TemplateDeductionInfo &Info) { 108031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // C++ [temp.class.spec.match]p2: 108131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // A partial specialization matches a given actual template 108231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // argument list if the template arguments of the partial 108331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // specialization can be deduced from the actual template argument 108431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // list (14.8.2). 108531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor SFINAETrap Trap(*this); 108631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor llvm::SmallVector<DeducedTemplateArgument, 4> Deduced; 108731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Deduced.resize(Partial->getTemplateParameters()->size()); 108831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (TemplateDeductionResult Result 108931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor = ::DeduceTemplateArguments(*this, 109031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Partial->getTemplateParameters(), 109131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Partial->getTemplateArgs(), 109231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor TemplateArgs, Info, Deduced)) 109331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Result; 109431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 109531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor InstantiatingTemplate Inst(*this, Partial->getLocation(), Partial, 109631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Deduced.data(), Deduced.size()); 109731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (Inst) 109831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return TDK_InstantiationDepth; 109931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 110031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor if (Trap.hasErrorOccurred()) 110131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return Sema::TDK_SubstitutionFailure; 110231dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor 110331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor return ::FinishTemplateArgumentDeduction(*this, Partial, TemplateArgs, 110431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor Deduced, Info); 11050b9247f129401b4849682b2e2bcdea8fc977068aDouglas Gregor} 1106031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 11074112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor/// \brief Determine whether the given type T is a simple-template-id type. 11084112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregorstatic bool isSimpleTemplateIdType(QualType T) { 11091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const TemplateSpecializationType *Spec 1110183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall = T->getAs<TemplateSpecializationType>()) 11114112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor return Spec->getTemplateName().getAsTemplateDecl() != 0; 11121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11134112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor return false; 11144112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor} 111583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 111683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \brief Substitute the explicitly-provided template arguments into the 111783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// given function template according to C++ [temp.arg.explicit]. 111883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 111983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param FunctionTemplate the function template into which the explicit 112083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// template arguments will be substituted. 112183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 11221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \param ExplicitTemplateArguments the explicitly-specified template 112383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// arguments. 112483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 11251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \param Deduced the deduced template arguments, which will be populated 112683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// with the converted and checked explicit template arguments. 112783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 11281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \param ParamTypes will be populated with the instantiated function 112983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// parameters. 113083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 113183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param FunctionType if non-NULL, the result type of the function template 113283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// will also be instantiated and the pointed-to value will be updated with 113383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// the instantiated function type. 113483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 113583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param Info if substitution fails for any reason, this object will be 113683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// populated with more information about the failure. 113783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 113883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \returns TDK_Success if substitution was successful, or some failure 113983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// condition. 114083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::TemplateDeductionResult 114183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::SubstituteExplicitTemplateArguments( 114283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionTemplateDecl *FunctionTemplate, 1143d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall const TemplateArgumentListInfo &ExplicitTemplateArgs, 114402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 114583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor llvm::SmallVectorImpl<QualType> &ParamTypes, 114683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor QualType *FunctionType, 114783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateDeductionInfo &Info) { 114883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 114983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateParameterList *TemplateParams 115083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = FunctionTemplate->getTemplateParameters(); 115183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 1152d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall if (ExplicitTemplateArgs.size() == 0) { 115383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // No arguments to substitute; just copy over the parameter types and 115483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // fill in the function type. 115583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor for (FunctionDecl::param_iterator P = Function->param_begin(), 115683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor PEnd = Function->param_end(); 115783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor P != PEnd; 115883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ++P) 115983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ParamTypes.push_back((*P)->getType()); 11601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (FunctionType) 116283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor *FunctionType = Function->getType(); 116383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_Success; 116483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 11651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 116683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Substitution of the explicit template arguments into a function template 116783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor /// is a SFINAE context. Trap any errors that might occur. 11681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SFINAETrap Trap(*this); 11691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 117083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // C++ [temp.arg.explicit]p3: 11711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Template arguments that are present shall be specified in the 11721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // declaration order of their corresponding template-parameters. The 117383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // template argument list shall not specify more template-arguments than 11741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // there are corresponding template-parameters. 11751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateArgumentListBuilder Builder(TemplateParams, 1176d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall ExplicitTemplateArgs.size()); 11771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Enter a new template instantiation context where we check the 117983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // explicitly-specified template arguments against this function template, 118083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // and then substitute them into the function parameter types. 11811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump InstantiatingTemplate Inst(*this, FunctionTemplate->getLocation(), 118283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionTemplate, Deduced.data(), Deduced.size(), 118383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ActiveTemplateInstantiation::ExplicitTemplateArgumentSubstitution); 118483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (Inst) 118583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_InstantiationDepth; 11861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 118796db310ab7ca59e1890ddef25a3701bc2909d20fJohn McCall ContextRAII SavedContext(*this, FunctionTemplate->getTemplatedDecl()); 1188f5813826802c2e76cdc13cae834ebfd4518d74a6John McCall 118983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (CheckTemplateArgumentList(FunctionTemplate, 119083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor SourceLocation(), 1191d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall ExplicitTemplateArgs, 119283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor true, 119383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Builder) || Trap.hasErrorOccurred()) 119483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_InvalidExplicitArguments; 11951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 119683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Form the template argument list from the explicitly-specified 119783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // template arguments. 11981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateArgumentList *ExplicitArgumentList 119983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = new (Context) TemplateArgumentList(Context, Builder, /*TakeArgs=*/true); 120083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.reset(ExplicitArgumentList); 12011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 120283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Instantiate the types of each of the function parameters given the 120383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // explicitly-specified template arguments. 120483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor for (FunctionDecl::param_iterator P = Function->param_begin(), 120583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor PEnd = Function->param_end(); 120683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor P != PEnd; 120783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ++P) { 12081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump QualType ParamType 12091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump = SubstType((*P)->getType(), 1210357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor MultiLevelTemplateArgumentList(*ExplicitArgumentList), 1211357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor (*P)->getLocation(), (*P)->getDeclName()); 121283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (ParamType.isNull() || Trap.hasErrorOccurred()) 121383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_SubstitutionFailure; 12141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 121583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ParamTypes.push_back(ParamType); 121683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 121783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 121883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // If the caller wants a full function type back, instantiate the return 121983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // type and form that function type. 122083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (FunctionType) { 122183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // FIXME: exception-specifications? 12221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const FunctionProtoType *Proto 1223183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall = Function->getType()->getAs<FunctionProtoType>(); 122483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor assert(Proto && "Function template does not have a prototype?"); 12251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump QualType ResultType 1227357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor = SubstType(Proto->getResultType(), 1228357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor MultiLevelTemplateArgumentList(*ExplicitArgumentList), 1229357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor Function->getTypeSpecStartLoc(), 1230357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor Function->getDeclName()); 123183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (ResultType.isNull() || Trap.hasErrorOccurred()) 123283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_SubstitutionFailure; 12331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump *FunctionType = BuildFunctionType(ResultType, 123583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ParamTypes.data(), ParamTypes.size(), 123683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Proto->isVariadic(), 123783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Proto->getTypeQuals(), 123883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Function->getLocation(), 123983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Function->getDeclName()); 124083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (FunctionType->isNull() || Trap.hasErrorOccurred()) 124183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_SubstitutionFailure; 124283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 12431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 124483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // C++ [temp.arg.explicit]p2: 12451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Trailing template arguments that can be deduced (14.8.2) may be 12461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // omitted from the list of explicit template-arguments. If all of the 124783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // template arguments can be deduced, they may all be omitted; in this 124883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // case, the empty template argument list <> itself may also be omitted. 124983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // 125083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Take all of the explicitly-specified arguments and put them into the 12511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // set of deduced template arguments. 125283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Deduced.reserve(TemplateParams->size()); 125383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor for (unsigned I = 0, N = ExplicitArgumentList->size(); I != N; ++I) 12541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Deduced.push_back(ExplicitArgumentList->get(I)); 12551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 125683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_Success; 125783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor} 125883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 125902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// \brief Allocate a TemplateArgumentLoc where all locations have 126002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// been initialized to the given location. 126102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// 126202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// \param S The semantic analysis object. 126302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// 126402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// \param The template argument we are producing template argument 126502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// location information for. 126602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// 126702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// \param NTTPType For a declaration template argument, the type of 126802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// the non-type template parameter that corresponds to this template 126902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// argument. 127002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// 127102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// \param Loc The source location to use for the resulting template 127202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor/// argument. 127302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregorstatic TemplateArgumentLoc 127402024a9f0d8e6c898de276193af604c42ee41269Douglas GregorgetTrivialTemplateArgumentLoc(Sema &S, 127502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor const TemplateArgument &Arg, 127602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor QualType NTTPType, 127702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor SourceLocation Loc) { 127802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor switch (Arg.getKind()) { 127902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor case TemplateArgument::Null: 128002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm_unreachable("Can't get a NULL template argument here"); 128102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor break; 128202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 128302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor case TemplateArgument::Type: 128402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TemplateArgumentLoc(Arg, 128502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor S.Context.getTrivialTypeSourceInfo(Arg.getAsType(), Loc)); 128602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 128702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor case TemplateArgument::Declaration: { 128802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Expr *E 128902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor = S.BuildExpressionFromDeclTemplateArgument(Arg, NTTPType, Loc) 129002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor .takeAs<Expr>(); 129102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TemplateArgumentLoc(TemplateArgument(E), E); 129202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 129302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 129402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor case TemplateArgument::Integral: { 129502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Expr *E 129602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor = S.BuildExpressionFromIntegralTemplateArgument(Arg, Loc).takeAs<Expr>(); 129702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TemplateArgumentLoc(TemplateArgument(E), E); 129802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 129902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 130002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor case TemplateArgument::Template: 130102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TemplateArgumentLoc(Arg, SourceRange(), Loc); 130202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 130302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor case TemplateArgument::Expression: 130402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TemplateArgumentLoc(Arg, Arg.getAsExpr()); 130502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 130602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor case TemplateArgument::Pack: 130702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm_unreachable("Template parameter packs are not yet supported"); 130802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 130902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 131002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TemplateArgumentLoc(); 131102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor} 131202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 13131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// \brief Finish template argument deduction for a function template, 131483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// checking the deduced template arguments for completeness and forming 131583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// the function template specialization. 13161eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpSema::TemplateDeductionResult 131783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 131802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 131902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor unsigned NumExplicitlySpecified, 132083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *&Specialization, 132183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateDeductionInfo &Info) { 132283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateParameterList *TemplateParams 132383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = FunctionTemplate->getTemplateParameters(); 13241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 132551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // Template argument deduction for function templates in a SFINAE context. 132651ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // Trap any errors that might occur. 132751ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor SFINAETrap Trap(*this); 132851ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 132951ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // Enter a new template instantiation context while we instantiate the 133051ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // actual function declaration. 133151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor InstantiatingTemplate Inst(*this, FunctionTemplate->getLocation(), 133251ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate, Deduced.data(), Deduced.size(), 133351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor ActiveTemplateInstantiation::DeducedTemplateArgumentSubstitution); 133451ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (Inst) 133551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor return TDK_InstantiationDepth; 133651ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 133796db310ab7ca59e1890ddef25a3701bc2909d20fJohn McCall ContextRAII SavedContext(*this, FunctionTemplate->getTemplatedDecl()); 1338f5813826802c2e76cdc13cae834ebfd4518d74a6John McCall 133983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // C++ [temp.deduct.type]p2: 134083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // [...] or if any template argument remains neither deduced nor 134183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // explicitly specified, template argument deduction fails. 134283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateArgumentListBuilder Builder(TemplateParams, Deduced.size()); 134383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor for (unsigned I = 0, N = Deduced.size(); I != N; ++I) { 134402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NamedDecl *Param = FunctionTemplate->getTemplateParameters()->getParam(I); 134551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (!Deduced[I].isNull()) { 134602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor if (I < NumExplicitlySpecified || 134702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Deduced[I].getKind() == TemplateArgument::Type) { 134802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // We have already fully type-checked and converted this 134902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // argument (because it was explicitly-specified) or no 135002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // additional checking is necessary (because it's a template 135102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // type parameter). Just record the presence of this 135202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // parameter. 135302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Builder.Append(Deduced[I]); 135402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor continue; 135502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 135602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 135702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // We have deduced this argument, so it still needs to be 135802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // checked and converted. 135902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 136002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // First, for a non-type template parameter type that is 136102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // initialized by a declaration, we need the type of the 136202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // corresponding non-type template parameter. 136302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor QualType NTTPType; 136402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor if (NonTypeTemplateParmDecl *NTTP 136502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor = dyn_cast<NonTypeTemplateParmDecl>(Param)) { 136602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor if (Deduced[I].getKind() == TemplateArgument::Declaration) { 136702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NTTPType = NTTP->getType(); 136802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor if (NTTPType->isDependentType()) { 136902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor TemplateArgumentList TemplateArgs(Context, Builder, 137002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor /*TakeArgs=*/false); 137102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NTTPType = SubstType(NTTPType, 137202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor MultiLevelTemplateArgumentList(TemplateArgs), 137302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NTTP->getLocation(), 137402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NTTP->getDeclName()); 137502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor if (NTTPType.isNull()) { 137602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Info.Param = makeTemplateParameter(Param); 137702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TDK_SubstitutionFailure; 137802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 137902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 138002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 138102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 138202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 138302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // Convert the deduced template argument into a template 138402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // argument that we can check, almost as if the user had written 138502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // the template argument explicitly. 138602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor TemplateArgumentLoc Arg = getTrivialTemplateArgumentLoc(*this, 138702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Deduced[I], 138802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NTTPType, 138902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor SourceLocation()); 139002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 139102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor // Check the template argument, converting it as necessary. 139202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor if (CheckTemplateArgument(Param, Arg, 139302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor FunctionTemplate, 139402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor FunctionTemplate->getLocation(), 139502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor FunctionTemplate->getSourceRange().getEnd(), 139602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Builder, 139702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Deduced[I].wasDeducedFromArrayBound() 139802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor ? CTAK_DeducedFromArrayBound 139902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor : CTAK_Deduced)) { 140002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Info.Param = makeTemplateParameter( 140102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor const_cast<NamedDecl *>(TemplateParams->getParam(I))); 140202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor return TDK_SubstitutionFailure; 140302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor } 140402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 140551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor continue; 140651ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor } 140751ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 140851ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // Substitute into the default template argument, if available. 140951ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor TemplateArgumentLoc DefArg 141051ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor = SubstDefaultTemplateArgumentIfAvailable(FunctionTemplate, 141151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getLocation(), 141251ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getSourceRange().getEnd(), 141351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor Param, 141451ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor Builder); 141551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 141651ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // If there was no default argument, deduction is incomplete. 141751ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (DefArg.getArgument().isNull()) { 141883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.Param = makeTemplateParameter( 141951ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor const_cast<NamedDecl *>(TemplateParams->getParam(I))); 142083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_Incomplete; 142183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 142251ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor 142351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // Check whether we can actually use the default argument. 142451ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor if (CheckTemplateArgument(Param, DefArg, 142551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate, 142651ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getLocation(), 142751ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor FunctionTemplate->getSourceRange().getEnd(), 142802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Builder, 142902024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor CTAK_Deduced)) { 143051ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor Info.Param = makeTemplateParameter( 143151ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor const_cast<NamedDecl *>(TemplateParams->getParam(I))); 143251ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor return TDK_SubstitutionFailure; 143351ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor } 14341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 143551ffb0c9d43b2d3fd210e51ecdd67ba5d1790d70Douglas Gregor // If we get here, we successfully used the default template argument. 143683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 14371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 143883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Form the template argument list from the deduced template arguments. 14391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump TemplateArgumentList *DeducedArgumentList 144083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = new (Context) TemplateArgumentList(Context, Builder, /*TakeArgs=*/true); 144183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.reset(DeducedArgumentList); 14421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // Substitute the deduced template arguments into the function template 144483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // declaration to produce the function template specialization. 1445d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor DeclContext *Owner = FunctionTemplate->getDeclContext(); 1446d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor if (FunctionTemplate->getFriendObjectKind()) 1447d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor Owner = FunctionTemplate->getLexicalDeclContext(); 144883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Specialization = cast_or_null<FunctionDecl>( 1449d4598a2cc7576c06f69d3cf64d0e2c9783ddf529Douglas Gregor SubstDecl(FunctionTemplate->getTemplatedDecl(), Owner, 1450357bbd022c1d340c8e255aea7a684ddb34bc76e5Douglas Gregor MultiLevelTemplateArgumentList(*DeducedArgumentList))); 145183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (!Specialization) 145283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_SubstitutionFailure; 14531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1454f882574cf640d5c8355965e1c486f9d8d8ffcf47Douglas Gregor assert(Specialization->getPrimaryTemplate()->getCanonicalDecl() == 1455f882574cf640d5c8355965e1c486f9d8d8ffcf47Douglas Gregor FunctionTemplate->getCanonicalDecl()); 1456f882574cf640d5c8355965e1c486f9d8d8ffcf47Douglas Gregor 14571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If the template argument list is owned by the function template 145883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // specialization, release it. 145983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (Specialization->getTemplateSpecializationArgs() == DeducedArgumentList) 146083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info.take(); 14611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 146283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // There may have been an error that did not prevent us from constructing a 146383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // declaration. Mark the declaration invalid and return with a substitution 146483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // failure. 146583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (Trap.hasErrorOccurred()) { 146683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Specialization->setInvalidDecl(true); 146783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return TDK_SubstitutionFailure; 146883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor } 14691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return TDK_Success; 147183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor} 147283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 1473eff92135d32039c9874dc356f3e93143af6069c1John McCallstatic QualType GetTypeOfFunction(ASTContext &Context, 1474eff92135d32039c9874dc356f3e93143af6069c1John McCall bool isAddressOfOperand, 1475eff92135d32039c9874dc356f3e93143af6069c1John McCall FunctionDecl *Fn) { 1476eff92135d32039c9874dc356f3e93143af6069c1John McCall if (!isAddressOfOperand) return Fn->getType(); 1477eff92135d32039c9874dc356f3e93143af6069c1John McCall if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Fn)) 1478eff92135d32039c9874dc356f3e93143af6069c1John McCall if (Method->isInstance()) 1479eff92135d32039c9874dc356f3e93143af6069c1John McCall return Context.getMemberPointerType(Fn->getType(), 1480eff92135d32039c9874dc356f3e93143af6069c1John McCall Context.getTypeDeclType(Method->getParent()).getTypePtr()); 1481eff92135d32039c9874dc356f3e93143af6069c1John McCall return Context.getPointerType(Fn->getType()); 1482eff92135d32039c9874dc356f3e93143af6069c1John McCall} 1483eff92135d32039c9874dc356f3e93143af6069c1John McCall 1484eff92135d32039c9874dc356f3e93143af6069c1John McCall/// Apply the deduction rules for overload sets. 1485eff92135d32039c9874dc356f3e93143af6069c1John McCall/// 1486eff92135d32039c9874dc356f3e93143af6069c1John McCall/// \return the null type if this argument should be treated as an 1487eff92135d32039c9874dc356f3e93143af6069c1John McCall/// undeduced context 1488eff92135d32039c9874dc356f3e93143af6069c1John McCallstatic QualType 1489eff92135d32039c9874dc356f3e93143af6069c1John McCallResolveOverloadForDeduction(Sema &S, TemplateParameterList *TemplateParams, 1490eff92135d32039c9874dc356f3e93143af6069c1John McCall Expr *Arg, QualType ParamType) { 14917bb12da2b0749eeebb21854c77877736969e59f2John McCall llvm::PointerIntPair<OverloadExpr*,1> R = OverloadExpr::find(Arg); 1492eff92135d32039c9874dc356f3e93143af6069c1John McCall 14937bb12da2b0749eeebb21854c77877736969e59f2John McCall bool isAddressOfOperand = bool(R.getInt()); 14947bb12da2b0749eeebb21854c77877736969e59f2John McCall OverloadExpr *Ovl = R.getPointer(); 1495eff92135d32039c9874dc356f3e93143af6069c1John McCall 1496eff92135d32039c9874dc356f3e93143af6069c1John McCall // If there were explicit template arguments, we can only find 1497eff92135d32039c9874dc356f3e93143af6069c1John McCall // something via C++ [temp.arg.explicit]p3, i.e. if the arguments 1498eff92135d32039c9874dc356f3e93143af6069c1John McCall // unambiguously name a full specialization. 14997bb12da2b0749eeebb21854c77877736969e59f2John McCall if (Ovl->hasExplicitTemplateArgs()) { 1500eff92135d32039c9874dc356f3e93143af6069c1John McCall // But we can still look for an explicit specialization. 1501eff92135d32039c9874dc356f3e93143af6069c1John McCall if (FunctionDecl *ExplicitSpec 15027bb12da2b0749eeebb21854c77877736969e59f2John McCall = S.ResolveSingleFunctionTemplateSpecialization(Ovl)) 15037bb12da2b0749eeebb21854c77877736969e59f2John McCall return GetTypeOfFunction(S.Context, isAddressOfOperand, ExplicitSpec); 1504eff92135d32039c9874dc356f3e93143af6069c1John McCall return QualType(); 1505eff92135d32039c9874dc356f3e93143af6069c1John McCall } 1506eff92135d32039c9874dc356f3e93143af6069c1John McCall 1507eff92135d32039c9874dc356f3e93143af6069c1John McCall // C++0x [temp.deduct.call]p6: 1508eff92135d32039c9874dc356f3e93143af6069c1John McCall // When P is a function type, pointer to function type, or pointer 1509eff92135d32039c9874dc356f3e93143af6069c1John McCall // to member function type: 1510eff92135d32039c9874dc356f3e93143af6069c1John McCall 1511eff92135d32039c9874dc356f3e93143af6069c1John McCall if (!ParamType->isFunctionType() && 1512eff92135d32039c9874dc356f3e93143af6069c1John McCall !ParamType->isFunctionPointerType() && 1513eff92135d32039c9874dc356f3e93143af6069c1John McCall !ParamType->isMemberFunctionPointerType()) 1514eff92135d32039c9874dc356f3e93143af6069c1John McCall return QualType(); 1515eff92135d32039c9874dc356f3e93143af6069c1John McCall 1516eff92135d32039c9874dc356f3e93143af6069c1John McCall QualType Match; 15177bb12da2b0749eeebb21854c77877736969e59f2John McCall for (UnresolvedSetIterator I = Ovl->decls_begin(), 15187bb12da2b0749eeebb21854c77877736969e59f2John McCall E = Ovl->decls_end(); I != E; ++I) { 1519eff92135d32039c9874dc356f3e93143af6069c1John McCall NamedDecl *D = (*I)->getUnderlyingDecl(); 1520eff92135d32039c9874dc356f3e93143af6069c1John McCall 1521eff92135d32039c9874dc356f3e93143af6069c1John McCall // - If the argument is an overload set containing one or more 1522eff92135d32039c9874dc356f3e93143af6069c1John McCall // function templates, the parameter is treated as a 1523eff92135d32039c9874dc356f3e93143af6069c1John McCall // non-deduced context. 1524eff92135d32039c9874dc356f3e93143af6069c1John McCall if (isa<FunctionTemplateDecl>(D)) 1525eff92135d32039c9874dc356f3e93143af6069c1John McCall return QualType(); 1526eff92135d32039c9874dc356f3e93143af6069c1John McCall 1527eff92135d32039c9874dc356f3e93143af6069c1John McCall FunctionDecl *Fn = cast<FunctionDecl>(D); 1528eff92135d32039c9874dc356f3e93143af6069c1John McCall QualType ArgType = GetTypeOfFunction(S.Context, isAddressOfOperand, Fn); 1529eff92135d32039c9874dc356f3e93143af6069c1John McCall 1530eff92135d32039c9874dc356f3e93143af6069c1John McCall // - If the argument is an overload set (not containing function 1531eff92135d32039c9874dc356f3e93143af6069c1John McCall // templates), trial argument deduction is attempted using each 1532eff92135d32039c9874dc356f3e93143af6069c1John McCall // of the members of the set. If deduction succeeds for only one 1533eff92135d32039c9874dc356f3e93143af6069c1John McCall // of the overload set members, that member is used as the 1534eff92135d32039c9874dc356f3e93143af6069c1John McCall // argument value for the deduction. If deduction succeeds for 1535eff92135d32039c9874dc356f3e93143af6069c1John McCall // more than one member of the overload set the parameter is 1536eff92135d32039c9874dc356f3e93143af6069c1John McCall // treated as a non-deduced context. 1537eff92135d32039c9874dc356f3e93143af6069c1John McCall 1538eff92135d32039c9874dc356f3e93143af6069c1John McCall // We do all of this in a fresh context per C++0x [temp.deduct.type]p2: 1539eff92135d32039c9874dc356f3e93143af6069c1John McCall // Type deduction is done independently for each P/A pair, and 1540eff92135d32039c9874dc356f3e93143af6069c1John McCall // the deduced template argument values are then combined. 1541eff92135d32039c9874dc356f3e93143af6069c1John McCall // So we do not reject deductions which were made elsewhere. 154202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVector<DeducedTemplateArgument, 8> 154302024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Deduced(TemplateParams->size()); 15445769d6195087229770d7ac90449443e026c47103John McCall Sema::TemplateDeductionInfo Info(S.Context, Ovl->getNameLoc()); 1545eff92135d32039c9874dc356f3e93143af6069c1John McCall unsigned TDF = 0; 1546eff92135d32039c9874dc356f3e93143af6069c1John McCall 1547eff92135d32039c9874dc356f3e93143af6069c1John McCall Sema::TemplateDeductionResult Result 1548a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = DeduceTemplateArguments(S, TemplateParams, 1549eff92135d32039c9874dc356f3e93143af6069c1John McCall ParamType, ArgType, 1550eff92135d32039c9874dc356f3e93143af6069c1John McCall Info, Deduced, TDF); 1551eff92135d32039c9874dc356f3e93143af6069c1John McCall if (Result) continue; 1552eff92135d32039c9874dc356f3e93143af6069c1John McCall if (!Match.isNull()) return QualType(); 1553eff92135d32039c9874dc356f3e93143af6069c1John McCall Match = ArgType; 1554eff92135d32039c9874dc356f3e93143af6069c1John McCall } 1555eff92135d32039c9874dc356f3e93143af6069c1John McCall 1556eff92135d32039c9874dc356f3e93143af6069c1John McCall return Match; 1557eff92135d32039c9874dc356f3e93143af6069c1John McCall} 1558eff92135d32039c9874dc356f3e93143af6069c1John McCall 1559e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \brief Perform template argument deduction from a function call 1560e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// (C++ [temp.deduct.call]). 1561e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 1562e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param FunctionTemplate the function template for which we are performing 1563e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// template argument deduction. 1564e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 156548026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// \param ExplicitTemplateArguments the explicit template arguments provided 156648026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// for this call. 15676db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor/// 1568e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param Args the function call arguments 1569e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 1570e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param NumArgs the number of arguments in Args 1571e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 157248026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// \param Name the name of the function being called. This is only significant 157348026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// when the function template is a conversion function template, in which 157448026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// case this routine will also perform template argument deduction based on 157548026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// the function to which 157648026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor/// 1577e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param Specialization if template argument deduction was successful, 15781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// this will be set to the function template specialization produced by 1579e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// template argument deduction. 1580e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 1581e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \param Info the argument will be updated to provide additional information 1582e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// about template argument deduction. 1583e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// 1584e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor/// \returns the result of template argument deduction. 1585e53060fa78ad7e98352049f72787bdb7543e2a48Douglas GregorSema::TemplateDeductionResult 1586e53060fa78ad7e98352049f72787bdb7543e2a48Douglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 158748026d26fb58e413544874eead5491b1452e2ebfDouglas Gregor const TemplateArgumentListInfo *ExplicitTemplateArgs, 1588e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor Expr **Args, unsigned NumArgs, 1589e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor FunctionDecl *&Specialization, 1590e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor TemplateDeductionInfo &Info) { 1591e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 15926db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor 1593e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // C++ [temp.deduct.call]p1: 1594e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // Template argument deduction is done by comparing each function template 1595e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // parameter type (call it P) with the type of the corresponding argument 1596e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // of the call (call it A) as described below. 1597e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor unsigned CheckArgs = NumArgs; 15986db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor if (NumArgs < Function->getMinRequiredArguments()) 1599e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor return TDK_TooFewArguments; 1600e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor else if (NumArgs > Function->getNumParams()) { 16011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const FunctionProtoType *Proto 1602183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall = Function->getType()->getAs<FunctionProtoType>(); 1603e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor if (!Proto->isVariadic()) 1604e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor return TDK_TooManyArguments; 16051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1606e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor CheckArgs = Function->getNumParams(); 1607e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 16081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16096db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // The types of the parameters from which we will perform template argument 16106db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // deduction. 16112b0749a4f8965d0205bf77322db150c13c39e3beDouglas Gregor Sema::LocalInstantiationScope InstScope(*this); 1612e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor TemplateParameterList *TemplateParams 1613e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor = FunctionTemplate->getTemplateParameters(); 161402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVector<DeducedTemplateArgument, 4> Deduced; 16156db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor llvm::SmallVector<QualType, 4> ParamTypes; 161602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor unsigned NumExplicitlySpecified = 0; 1617d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall if (ExplicitTemplateArgs) { 161883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateDeductionResult Result = 161983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor SubstituteExplicitTemplateArguments(FunctionTemplate, 1620d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall *ExplicitTemplateArgs, 162183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Deduced, 162283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor ParamTypes, 162383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 0, 162483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Info); 162583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor if (Result) 162683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return Result; 162702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 162802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NumExplicitlySpecified = Deduced.size(); 16296db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor } else { 16306db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // Just fill in the parameter types from the function declaration. 16316db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor for (unsigned I = 0; I != CheckArgs; ++I) 16326db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor ParamTypes.push_back(Function->getParamDecl(I)->getType()); 16336db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor } 16341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16356db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor // Deduce template arguments from the function parameters. 16361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Deduced.resize(TemplateParams->size()); 1637e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor for (unsigned I = 0; I != CheckArgs; ++I) { 16386db8ed4498b83fe9336e3855a4ba1a298b04ee00Douglas Gregor QualType ParamType = ParamTypes[I]; 1639e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor QualType ArgType = Args[I]->getType(); 16401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1641eff92135d32039c9874dc356f3e93143af6069c1John McCall // Overload sets usually make this parameter an undeduced 1642eff92135d32039c9874dc356f3e93143af6069c1John McCall // context, but there are sometimes special circumstances. 1643eff92135d32039c9874dc356f3e93143af6069c1John McCall if (ArgType == Context.OverloadTy) { 1644eff92135d32039c9874dc356f3e93143af6069c1John McCall ArgType = ResolveOverloadForDeduction(*this, TemplateParams, 1645eff92135d32039c9874dc356f3e93143af6069c1John McCall Args[I], ParamType); 1646eff92135d32039c9874dc356f3e93143af6069c1John McCall if (ArgType.isNull()) 1647eff92135d32039c9874dc356f3e93143af6069c1John McCall continue; 1648eff92135d32039c9874dc356f3e93143af6069c1John McCall } 1649eff92135d32039c9874dc356f3e93143af6069c1John McCall 1650e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // C++ [temp.deduct.call]p2: 1651e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // If P is not a reference type: 1652e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor QualType CanonParamType = Context.getCanonicalType(ParamType); 1653500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor bool ParamWasReference = isa<ReferenceType>(CanonParamType); 1654500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor if (!ParamWasReference) { 16551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // - If A is an array type, the pointer type produced by the 16561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // array-to-pointer standard conversion (4.2) is used in place of 1657e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // A for type deduction; otherwise, 1658e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor if (ArgType->isArrayType()) 1659e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor ArgType = Context.getArrayDecayedType(ArgType); 16601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // - If A is a function type, the pointer type produced by the 16611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // function-to-pointer standard conversion (4.3) is used in place 1662e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // of A for type deduction; otherwise, 1663e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor else if (ArgType->isFunctionType()) 1664e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor ArgType = Context.getPointerType(ArgType); 1665e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor else { 1666e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // - If A is a cv-qualified type, the top level cv-qualifiers of A’s 1667e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // type are ignored for type deduction. 1668e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor QualType CanonArgType = Context.getCanonicalType(ArgType); 1669a4923eb7c4b04d360cb2747641a5e92818edf804Douglas Gregor if (CanonArgType.getLocalCVRQualifiers()) 1670a4923eb7c4b04d360cb2747641a5e92818edf804Douglas Gregor ArgType = CanonArgType.getLocalUnqualifiedType(); 1671e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 1672e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 16731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1674e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // C++0x [temp.deduct.call]p3: 1675e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // If P is a cv-qualified type, the top level cv-qualifiers of P’s type 16761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // are ignored for type deduction. 1677a4923eb7c4b04d360cb2747641a5e92818edf804Douglas Gregor if (CanonParamType.getLocalCVRQualifiers()) 1678a4923eb7c4b04d360cb2747641a5e92818edf804Douglas Gregor ParamType = CanonParamType.getLocalUnqualifiedType(); 16796217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek if (const ReferenceType *ParamRefType = ParamType->getAs<ReferenceType>()) { 16801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // [...] If P is a reference type, the type referred to by P is used 16811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // for type deduction. 1682e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor ParamType = ParamRefType->getPointeeType(); 16831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // [...] If P is of the form T&&, where T is a template parameter, and 16851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // the argument is an lvalue, the type A& is used in place of A for 1686e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // type deduction. 1687e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor if (isa<RValueReferenceType>(ParamRefType) && 1688183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall ParamRefType->getAs<TemplateTypeParmType>() && 1689e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor Args[I]->isLvalue(Context) == Expr::LV_Valid) 1690e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor ArgType = Context.getLValueReferenceType(ArgType); 1691e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 16921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1693e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // C++0x [temp.deduct.call]p4: 1694e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // In general, the deduction process attempts to find template argument 1695e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // values that will make the deduced A identical to A (after the type A 1696e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor // is transformed as described above). [...] 16971282029f3d37f482bbba3c38ea9da17a78d11d40Douglas Gregor unsigned TDF = TDF_SkipNonDependent; 16981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1699508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor // - If the original P is a reference type, the deduced A (i.e., the 1700508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor // type referred to by the reference) can be more cv-qualified than 1701508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor // the transformed A. 1702508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (ParamWasReference) 1703508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF |= TDF_ParamWithReferenceType; 17041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // - The transformed A can be another pointer or pointer to member 17051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // type that can be converted to the deduced A via a qualification 1706508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor // conversion (4.4). 1707508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor if (ArgType->isPointerType() || ArgType->isMemberPointerType()) 1708508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF |= TDF_IgnoreQualifiers; 17091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // - If P is a class and P has the form simple-template-id, then the 17104112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor // transformed A can be a derived class of the deduced A. Likewise, 17114112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor // if P is a pointer to a class of the form simple-template-id, the 17124112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor // transformed A can be a pointer to a derived class pointed to by 17134112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor // the deduced A. 17144112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor if (isSimpleTemplateIdType(ParamType) || 17151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (isa<PointerType>(ParamType) && 17164112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor isSimpleTemplateIdType( 17176217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek ParamType->getAs<PointerType>()->getPointeeType()))) 17184112877d1043d0b937f5abcf043bc7fa48138f05Douglas Gregor TDF |= TDF_DerivedClass; 17191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1720e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor if (TemplateDeductionResult Result 1721a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = ::DeduceTemplateArguments(*this, TemplateParams, 1722500d331eade2f5070b66ba51d777224f9fda6e1dDouglas Gregor ParamType, ArgType, Info, Deduced, 1723508f1c889b9833903ea394034fe0246d3a57a32dDouglas Gregor TDF)) 1724e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor return Result; 17251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 172665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // FIXME: we need to check that the deduced A is the same as A, 172765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // modulo the various allowed differences. 1728e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor } 172965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 17301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return FinishTemplateArgumentDeduction(FunctionTemplate, Deduced, 173102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NumExplicitlySpecified, 173283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Specialization, Info); 173383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor} 1734127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor 173583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \brief Deduce template arguments when taking the address of a function 17364b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// template (C++ [temp.deduct.funcaddr]) or matching a specialization to 17374b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// a template. 173883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 173983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param FunctionTemplate the function template for which we are performing 174083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// template argument deduction. 174183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 17424b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param ExplicitTemplateArguments the explicitly-specified template 17434b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// arguments. 174483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 174583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param ArgFunctionType the function type that will be used as the 174683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// "argument" type (A) when performing template argument deduction from the 17474b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// function template's function type. This type may be NULL, if there is no 17484b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// argument type to compare against, in C++0x [temp.arg.explicit]p3. 174983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 175083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param Specialization if template argument deduction was successful, 17511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// this will be set to the function template specialization produced by 175283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// template argument deduction. 175383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 175483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \param Info the argument will be updated to provide additional information 175583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// about template argument deduction. 175683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// 175783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor/// \returns the result of template argument deduction. 175883314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::TemplateDeductionResult 175983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 1760d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall const TemplateArgumentListInfo *ExplicitTemplateArgs, 176183314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor QualType ArgFunctionType, 176283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *&Specialization, 176383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateDeductionInfo &Info) { 176483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 176583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor TemplateParameterList *TemplateParams 176683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor = FunctionTemplate->getTemplateParameters(); 176783314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor QualType FunctionType = Function->getType(); 17681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 176983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Substitute any explicit template arguments. 17702b0749a4f8965d0205bf77322db150c13c39e3beDouglas Gregor Sema::LocalInstantiationScope InstScope(*this); 177102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVector<DeducedTemplateArgument, 4> Deduced; 177202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor unsigned NumExplicitlySpecified = 0; 177383314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor llvm::SmallVector<QualType, 4> ParamTypes; 1774d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall if (ExplicitTemplateArgs) { 17751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (TemplateDeductionResult Result 17761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump = SubstituteExplicitTemplateArguments(FunctionTemplate, 1777d5532b6cfff2977e0c59fa6ead7f7973984a620dJohn McCall *ExplicitTemplateArgs, 17781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Deduced, ParamTypes, 177983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor &FunctionType, Info)) 178083314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor return Result; 178102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor 178202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NumExplicitlySpecified = Deduced.size(); 1783127102b5196ffe04bdb70fd553fe62c265ab10a9Douglas Gregor } 178483314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 178583314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Template argument deduction for function templates in a SFINAE context. 178683314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor // Trap any errors that might occur. 17871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SFINAETrap Trap(*this); 17881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1789eff92135d32039c9874dc356f3e93143af6069c1John McCall Deduced.resize(TemplateParams->size()); 1790eff92135d32039c9874dc356f3e93143af6069c1John McCall 17914b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor if (!ArgFunctionType.isNull()) { 17924b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor // Deduce template arguments from the function type. 17934b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor if (TemplateDeductionResult Result 1794a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = ::DeduceTemplateArguments(*this, TemplateParams, 17954b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor FunctionType, ArgFunctionType, Info, 17964b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor Deduced, 0)) 17974b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor return Result; 17984b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor } 17994b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor 18001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return FinishTemplateArgumentDeduction(FunctionTemplate, Deduced, 180102024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor NumExplicitlySpecified, 180283314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor Specialization, Info); 1803e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor} 1804e53060fa78ad7e98352049f72787bdb7543e2a48Douglas Gregor 180565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// \brief Deduce template arguments for a templated conversion 180665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// function (C++ [temp.deduct.conv]) and, if successful, produce a 180765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// conversion function template specialization. 180865ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorSema::TemplateDeductionResult 180965ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 181065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType ToType, 181165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor CXXConversionDecl *&Specialization, 181265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TemplateDeductionInfo &Info) { 18131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump CXXConversionDecl *Conv 181465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor = cast<CXXConversionDecl>(FunctionTemplate->getTemplatedDecl()); 181565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType FromType = Conv->getConversionType(); 181665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 181765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Canonicalize the types for deduction. 181865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType P = Context.getCanonicalType(FromType); 181965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor QualType A = Context.getCanonicalType(ToType); 182065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 182165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++0x [temp.deduct.conv]p3: 182265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // If P is a reference type, the type referred to by P is used for 182365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type deduction. 182465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (const ReferenceType *PRef = P->getAs<ReferenceType>()) 182565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = PRef->getPointeeType(); 182665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 182765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++0x [temp.deduct.conv]p3: 182865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // If A is a reference type, the type referred to by A is used 182965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // for type deduction. 183065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (const ReferenceType *ARef = A->getAs<ReferenceType>()) 183165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor A = ARef->getPointeeType(); 183265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++ [temp.deduct.conv]p2: 183365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // 18341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If A is not a reference type: 183565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor else { 183665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor assert(!A->isReferenceType() && "Reference types were handled above"); 183765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 183865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If P is an array type, the pointer type produced by the 18391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // array-to-pointer standard conversion (4.2) is used in place 184065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // of P for type deduction; otherwise, 184165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (P->isArrayType()) 184265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = Context.getArrayDecayedType(P); 184365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If P is a function type, the pointer type produced by the 184465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // function-to-pointer standard conversion (4.3) is used in 184565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // place of P for type deduction; otherwise, 184665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor else if (P->isFunctionType()) 184765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = Context.getPointerType(P); 184865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If P is a cv-qualified type, the top level cv-qualifiers of 184965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // P’s type are ignored for type deduction. 185065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor else 185165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P = P.getUnqualifiedType(); 185265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 185365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++0x [temp.deduct.conv]p3: 185465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // If A is a cv-qualified type, the top level cv-qualifiers of A’s 185565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type are ignored for type deduction. 185665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor A = A.getUnqualifiedType(); 185765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor } 185865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 185965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Template argument deduction for function templates in a SFINAE context. 186065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Trap any errors that might occur. 18611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump SFINAETrap Trap(*this); 186265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 186365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++ [temp.deduct.conv]p1: 186465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Template argument deduction is done by comparing the return 186565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type of the template conversion function (call it P) with the 186665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type that is required as the result of the conversion (call it 186765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // A) as described in 14.8.2.4. 186865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TemplateParameterList *TemplateParams 186965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor = FunctionTemplate->getTemplateParameters(); 187002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVector<DeducedTemplateArgument, 4> Deduced; 18711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Deduced.resize(TemplateParams->size()); 187265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 187365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // C++0x [temp.deduct.conv]p4: 187465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // In general, the deduction process attempts to find template 187565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // argument values that will make the deduced A identical to 187665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // A. However, there are two cases that allow a difference: 187765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor unsigned TDF = 0; 187865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - If the original A is a reference type, A can be more 187965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // cv-qualified than the deduced A (i.e., the type referred to 188065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // by the reference) 188165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (ToType->isReferenceType()) 188265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TDF |= TDF_ParamWithReferenceType; 188365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // - The deduced A can be another pointer or pointer to member 188465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // type that can be converted to A via a qualification 188565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // conversion. 188665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // 188765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // (C++0x [temp.deduct.conv]p6 clarifies that this only happens when 188865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // both P and A are pointers or member pointers. In this case, we 188965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // just ignore cv-qualifiers completely). 189065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if ((P->isPointerType() && A->isPointerType()) || 189165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor (P->isMemberPointerType() && P->isMemberPointerType())) 189265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TDF |= TDF_IgnoreQualifiers; 189365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (TemplateDeductionResult Result 1894a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth = ::DeduceTemplateArguments(*this, TemplateParams, 189565ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor P, A, Info, Deduced, TDF)) 189665ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return Result; 189765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 189865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // FIXME: we need to check that the deduced A is the same as A, 189965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // modulo the various allowed differences. 19001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 190165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor // Finish template argument deduction. 19022b0749a4f8965d0205bf77322db150c13c39e3beDouglas Gregor Sema::LocalInstantiationScope InstScope(*this); 190365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor FunctionDecl *Spec = 0; 190465ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor TemplateDeductionResult Result 190502024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor = FinishTemplateArgumentDeduction(FunctionTemplate, Deduced, 0, Spec, 190602024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor Info); 190765ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor Specialization = cast_or_null<CXXConversionDecl>(Spec); 190865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return Result; 190965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor} 191065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor 19114b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \brief Deduce template arguments for a function template when there is 19124b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// nothing to deduce against (C++0x [temp.arg.explicit]p3). 19134b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 19144b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param FunctionTemplate the function template for which we are performing 19154b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// template argument deduction. 19164b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 19174b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param ExplicitTemplateArguments the explicitly-specified template 19184b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// arguments. 19194b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 19204b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param Specialization if template argument deduction was successful, 19214b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// this will be set to the function template specialization produced by 19224b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// template argument deduction. 19234b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 19244b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \param Info the argument will be updated to provide additional information 19254b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// about template argument deduction. 19264b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// 19274b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor/// \returns the result of template argument deduction. 19284b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas GregorSema::TemplateDeductionResult 19294b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas GregorSema::DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 19304b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor const TemplateArgumentListInfo *ExplicitTemplateArgs, 19314b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor FunctionDecl *&Specialization, 19324b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor TemplateDeductionInfo &Info) { 19334b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor return DeduceTemplateArguments(FunctionTemplate, ExplicitTemplateArgs, 19344b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor QualType(), Specialization, Info); 19354b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor} 19364b52e25f3b05ab0f9d2492276a52323a50a84fb7Douglas Gregor 19378a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \brief Stores the result of comparing the qualifiers of two types. 19388a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregorenum DeductionQualifierComparison { 19398a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor NeitherMoreQualified = 0, 19408a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor ParamMoreQualified, 19418a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor ArgMoreQualified 19428a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor}; 19438a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 19448a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \brief Deduce the template arguments during partial ordering by comparing 19458a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// the parameter type and the argument type (C++0x [temp.deduct.partial]). 19468a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// 1947a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth/// \param S the semantic analysis object within which we are deducing 19488a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// 19498a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \param TemplateParams the template parameters that we are deducing 19508a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// 19518a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \param ParamIn the parameter type 19528a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// 19538a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \param ArgIn the argument type 19548a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// 19558a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \param Info information about the template argument deduction itself 19568a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// 19578a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \param Deduced the deduced template arguments 19588a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// 19598a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \returns the result of template argument deduction so far. Note that a 19608a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// "success" result means that template argument deduction has not yet failed, 19618a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// but it may still fail, later, for other reasons. 19628a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregorstatic Sema::TemplateDeductionResult 1963a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler CarruthDeduceTemplateArgumentsDuringPartialOrdering(Sema &S, 196402024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor TemplateParameterList *TemplateParams, 19658a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor QualType ParamIn, QualType ArgIn, 19668a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Sema::TemplateDeductionInfo &Info, 196702024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 196802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<DeductionQualifierComparison> *QualifierComparisons) { 1969a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth CanQualType Param = S.Context.getCanonicalType(ParamIn); 1970a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth CanQualType Arg = S.Context.getCanonicalType(ArgIn); 19718a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 19728a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p5: 19738a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // Before the partial ordering is done, certain transformations are 19748a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // performed on the types used for partial ordering: 19758a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - If P is a reference type, P is replaced by the type referred to. 19768a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor CanQual<ReferenceType> ParamRef = Param->getAs<ReferenceType>(); 1977e27ec8ad56dbf1efb2de004b90fbbb86f740e3f1John McCall if (!ParamRef.isNull()) 19788a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Param = ParamRef->getPointeeType(); 19798a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 19808a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - If A is a reference type, A is replaced by the type referred to. 19818a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor CanQual<ReferenceType> ArgRef = Arg->getAs<ReferenceType>(); 1982e27ec8ad56dbf1efb2de004b90fbbb86f740e3f1John McCall if (!ArgRef.isNull()) 19838a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Arg = ArgRef->getPointeeType(); 19848a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 1985e27ec8ad56dbf1efb2de004b90fbbb86f740e3f1John McCall if (QualifierComparisons && !ParamRef.isNull() && !ArgRef.isNull()) { 19868a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p6: 19878a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // If both P and A were reference types (before being replaced with the 19888a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // type referred to above), determine which of the two types (if any) is 19898a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // more cv-qualified than the other; otherwise the types are considered to 19908a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // be equally cv-qualified for partial ordering purposes. The result of this 19918a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // determination will be used below. 19928a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // 19938a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // We save this information for later, using it only when deduction 19948a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // succeeds in both directions. 19958a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor DeductionQualifierComparison QualifierResult = NeitherMoreQualified; 19968a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Param.isMoreQualifiedThan(Arg)) 19978a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor QualifierResult = ParamMoreQualified; 19988a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor else if (Arg.isMoreQualifiedThan(Param)) 19998a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor QualifierResult = ArgMoreQualified; 20008a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor QualifierComparisons->push_back(QualifierResult); 20018a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 20028a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20038a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p7: 20048a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // Remove any top-level cv-qualifiers: 20058a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - If P is a cv-qualified type, P is replaced by the cv-unqualified 20068a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // version of P. 20078a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Param = Param.getUnqualifiedType(); 20088a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - If A is a cv-qualified type, A is replaced by the cv-unqualified 20098a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // version of A. 20108a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Arg = Arg.getUnqualifiedType(); 20118a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20128a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p8: 20138a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // Using the resulting types P and A the deduction is then done as 20148a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // described in 14.9.2.5. If deduction succeeds for a given type, the type 20158a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // from the argument template is considered to be at least as specialized 20168a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // as the type from the parameter template. 2017a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth return DeduceTemplateArguments(S, TemplateParams, Param, Arg, Info, 20188a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Deduced, TDF_None); 20198a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor} 20208a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20218a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregorstatic void 2022e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorMarkUsedTemplateParameters(Sema &SemaRef, QualType T, 2023e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 2024ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Level, 2025e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Deduced); 20268a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20278a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \brief Determine whether the function template \p FT1 is at least as 20288a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// specialized as \p FT2. 20298a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregorstatic bool isAtLeastAsSpecializedAs(Sema &S, 20305769d6195087229770d7ac90449443e026c47103John McCall SourceLocation Loc, 20318a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FunctionTemplateDecl *FT1, 20328a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FunctionTemplateDecl *FT2, 20338a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplatePartialOrderingContext TPOC, 20348a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor llvm::SmallVectorImpl<DeductionQualifierComparison> *QualifierComparisons) { 20358a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FunctionDecl *FD1 = FT1->getTemplatedDecl(); 20368a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FunctionDecl *FD2 = FT2->getTemplatedDecl(); 20378a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor const FunctionProtoType *Proto1 = FD1->getType()->getAs<FunctionProtoType>(); 20388a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor const FunctionProtoType *Proto2 = FD2->getType()->getAs<FunctionProtoType>(); 20398a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20408a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor assert(Proto1 && Proto2 && "Function templates must have prototypes"); 20418a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplateParameterList *TemplateParams = FT2->getTemplateParameters(); 204202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVector<DeducedTemplateArgument, 4> Deduced; 20438a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Deduced.resize(TemplateParams->size()); 20448a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20458a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p3: 20468a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // The types used to determine the ordering depend on the context in which 20478a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // the partial ordering is done: 20485769d6195087229770d7ac90449443e026c47103John McCall Sema::TemplateDeductionInfo Info(S.Context, Loc); 20498a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor switch (TPOC) { 20508a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Call: { 20518a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - In the context of a function call, the function parameter types are 20528a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // used. 20538a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor unsigned NumParams = std::min(Proto1->getNumArgs(), Proto2->getNumArgs()); 20548a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor for (unsigned I = 0; I != NumParams; ++I) 2055a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (DeduceTemplateArgumentsDuringPartialOrdering(S, 20568a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplateParams, 20578a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Proto2->getArgType(I), 20588a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Proto1->getArgType(I), 20598a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Info, 20608a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Deduced, 20618a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor QualifierComparisons)) 20628a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 20638a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20648a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 20658a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 20668a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20678a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Conversion: 20688a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - In the context of a call to a conversion operator, the return types 20698a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // of the conversion function templates are used. 2070a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (DeduceTemplateArgumentsDuringPartialOrdering(S, 20718a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplateParams, 20728a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Proto2->getResultType(), 20738a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Proto1->getResultType(), 20748a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Info, 20758a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Deduced, 20768a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor QualifierComparisons)) 20778a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 20788a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 20798a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20808a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Other: 20818a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // - In other contexts (14.6.6.2) the function template’s function type 20828a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // is used. 2083a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth if (DeduceTemplateArgumentsDuringPartialOrdering(S, 20848a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplateParams, 20858a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FD2->getType(), 20868a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor FD1->getType(), 20878a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Info, 20888a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Deduced, 20898a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor QualifierComparisons)) 20908a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 20918a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 20928a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 20938a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 20948a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p11: 20958a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // In most cases, all template parameters must have values in order for 20968a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // deduction to succeed, but for partial ordering purposes a template 20978a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // parameter may remain without a value provided it is not used in the 20988a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // types being used for partial ordering. [ Note: a template parameter used 20998a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // in a non-deduced context is considered used. -end note] 21008a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor unsigned ArgIdx = 0, NumArgs = Deduced.size(); 21018a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor for (; ArgIdx != NumArgs; ++ArgIdx) 21028a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Deduced[ArgIdx].isNull()) 21038a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 21048a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21058a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (ArgIdx == NumArgs) { 21068a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // All template arguments were deduced. FT1 is at least as specialized 21078a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // as FT2. 21088a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return true; 21098a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 21108a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 2111e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor // Figure out which template parameters were used. 21128a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor llvm::SmallVector<bool, 4> UsedParameters; 21138a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor UsedParameters.resize(TemplateParams->size()); 21148a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor switch (TPOC) { 21158a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Call: { 21168a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor unsigned NumParams = std::min(Proto1->getNumArgs(), Proto2->getNumArgs()); 21178a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor for (unsigned I = 0; I != NumParams; ++I) 2118ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor ::MarkUsedTemplateParameters(S, Proto2->getArgType(I), false, 2119ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor TemplateParams->getDepth(), 2120e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor UsedParameters); 21218a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 21228a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 21238a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21248a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Conversion: 2125ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor ::MarkUsedTemplateParameters(S, Proto2->getResultType(), false, 2126ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor TemplateParams->getDepth(), 2127e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor UsedParameters); 21288a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 21298a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21308a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case TPOC_Other: 2131ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor ::MarkUsedTemplateParameters(S, FD2->getType(), false, 2132ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor TemplateParams->getDepth(), 2133ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor UsedParameters); 21348a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 21358a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 21368a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21378a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor for (; ArgIdx != NumArgs; ++ArgIdx) 21388a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // If this argument had no value deduced but was used in one of the types 21398a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // used for partial ordering, then deduction fails. 21408a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Deduced[ArgIdx].isNull() && UsedParameters[ArgIdx]) 21418a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return false; 21428a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21438a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return true; 21448a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor} 21458a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21468a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 2147bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \brief Returns the more specialized function template according 214865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// to the rules of function template partial ordering (C++ [temp.func.order]). 214965ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// 215065ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// \param FT1 the first function template 215165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// 215265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// \param FT2 the second function template 215365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// 21548a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// \param TPOC the context in which we are performing partial ordering of 21558a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor/// function templates. 21561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump/// 2157bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \returns the more specialized function template. If neither 215865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor/// template is more specialized, returns NULL. 215965ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorFunctionTemplateDecl * 216065ec1fda479688d143fe2403242cd9c730c800a1Douglas GregorSema::getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 216165ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor FunctionTemplateDecl *FT2, 21625769d6195087229770d7ac90449443e026c47103John McCall SourceLocation Loc, 21638a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor TemplatePartialOrderingContext TPOC) { 21648a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor llvm::SmallVector<DeductionQualifierComparison, 4> QualifierComparisons; 21655769d6195087229770d7ac90449443e026c47103John McCall bool Better1 = isAtLeastAsSpecializedAs(*this, Loc, FT1, FT2, TPOC, 0); 21665769d6195087229770d7ac90449443e026c47103John McCall bool Better2 = isAtLeastAsSpecializedAs(*this, Loc, FT2, FT1, TPOC, 21678a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor &QualifierComparisons); 21688a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21698a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Better1 != Better2) // We have a clear winner 21708a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return Better1? FT1 : FT2; 21718a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21728a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (!Better1 && !Better2) // Neither is better than the other 217365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return 0; 21748a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21758a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21768a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p10: 21778a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // If for each type being considered a given template is at least as 21788a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // specialized for all types and more specialized for some set of types and 21798a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // the other template is not more specialized for any types or is not at 21808a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // least as specialized for any types, then the given template is more 21818a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // specialized than the other template. Otherwise, neither template is more 21828a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // specialized than the other. 21838a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Better1 = false; 21848a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Better2 = false; 21858a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor for (unsigned I = 0, N = QualifierComparisons.size(); I != N; ++I) { 21868a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // C++0x [temp.deduct.partial]p9: 21878a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // If, for a given type, deduction succeeds in both directions (i.e., the 21888a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // types are identical after the transformations above) and if the type 21898a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // from the argument template is more cv-qualified than the type from the 21908a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // parameter template (as described above) that type is considered to be 21918a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // more specialized than the other. If neither type is more cv-qualified 21928a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor // than the other then neither type is more specialized than the other. 21938a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor switch (QualifierComparisons[I]) { 21948a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case NeitherMoreQualified: 21958a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 21968a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 21978a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case ParamMoreQualified: 21988a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Better1 = true; 21998a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Better2) 22008a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return 0; 22018a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 22028a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 22038a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor case ArgMoreQualified: 22048a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor Better2 = true; 22058a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor if (Better1) 22068a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return 0; 22078a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor break; 22088a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 22098a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor } 22108a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor 22118a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor assert(!(Better1 && Better2) && "Should have broken out in the loop above"); 221265ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor if (Better1) 221365ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor return FT1; 22148a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor else if (Better2) 22158a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return FT2; 22168a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor else 22178a51491d936d8c50480f3c3ca6647be12a7ad51fDouglas Gregor return 0; 221865ec1fda479688d143fe2403242cd9c730c800a1Douglas Gregor} 221983314aa1cf61ed2458a8a20c83b2d4708192d5dcDouglas Gregor 2220d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \brief Determine if the two templates are equivalent. 2221d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregorstatic bool isSameTemplate(TemplateDecl *T1, TemplateDecl *T2) { 2222d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (T1 == T2) 2223d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor return true; 2224d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2225d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (!T1 || !T2) 2226d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor return false; 2227d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2228d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor return T1->getCanonicalDecl() == T2->getCanonicalDecl(); 2229d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor} 2230d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2231d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \brief Retrieve the most specialized of the given function template 2232d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// specializations. 2233d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2234c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// \param SpecBegin the start iterator of the function template 2235c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// specializations that we will be comparing. 2236d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2237c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// \param SpecEnd the end iterator of the function template 2238c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// specializations, paired with \p SpecBegin. 2239d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2240d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param TPOC the partial ordering context to use to compare the function 2241d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// template specializations. 2242d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2243d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param Loc the location where the ambiguity or no-specializations 2244d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// diagnostic should occur. 2245d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2246d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param NoneDiag partial diagnostic used to diagnose cases where there are 2247d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// no matching candidates. 2248d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2249d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param AmbigDiag partial diagnostic used to diagnose an ambiguity, if one 2250d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// occurs. 2251d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2252d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param CandidateDiag partial diagnostic used for each function template 2253d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// specialization that is a candidate in the ambiguous ordering. One parameter 2254d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// in this diagnostic should be unbound, which will correspond to the string 2255d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// describing the template arguments for the function template specialization. 2256d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2257d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \param Index if non-NULL and the result of this function is non-nULL, 2258d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// receives the index corresponding to the resulting function template 2259d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// specialization. 2260d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2261d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \returns the most specialized function template specialization, if 2262c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall/// found. Otherwise, returns SpecEnd. 2263d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// 2264d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// \todo FIXME: Consider passing in the "also-ran" candidates that failed 2265d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor/// template argument deduction. 2266c373d48502ca7683ab55385f5bd624d778eb288dJohn McCallUnresolvedSetIterator 2267c373d48502ca7683ab55385f5bd624d778eb288dJohn McCallSema::getMostSpecialized(UnresolvedSetIterator SpecBegin, 2268c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall UnresolvedSetIterator SpecEnd, 2269c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall TemplatePartialOrderingContext TPOC, 2270c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall SourceLocation Loc, 2271c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall const PartialDiagnostic &NoneDiag, 2272c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall const PartialDiagnostic &AmbigDiag, 2273c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall const PartialDiagnostic &CandidateDiag) { 2274c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall if (SpecBegin == SpecEnd) { 2275d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Diag(Loc, NoneDiag); 2276c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return SpecEnd; 2277d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 2278d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2279c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall if (SpecBegin + 1 == SpecEnd) 2280c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return SpecBegin; 2281d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2282d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // Find the function template that is better than all of the templates it 2283d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // has been compared to. 2284c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall UnresolvedSetIterator Best = SpecBegin; 2285d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor FunctionTemplateDecl *BestTemplate 2286c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall = cast<FunctionDecl>(*Best)->getPrimaryTemplate(); 2287d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor assert(BestTemplate && "Not a function template specialization?"); 2288c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall for (UnresolvedSetIterator I = SpecBegin + 1; I != SpecEnd; ++I) { 2289c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall FunctionTemplateDecl *Challenger 2290c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall = cast<FunctionDecl>(*I)->getPrimaryTemplate(); 2291d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor assert(Challenger && "Not a function template specialization?"); 2292c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall if (isSameTemplate(getMoreSpecializedTemplate(BestTemplate, Challenger, 22935769d6195087229770d7ac90449443e026c47103John McCall Loc, TPOC), 2294d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Challenger)) { 2295d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Best = I; 2296d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor BestTemplate = Challenger; 2297d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 2298d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 2299d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2300d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // Make sure that the "best" function template is more specialized than all 2301d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // of the others. 2302d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor bool Ambiguous = false; 2303c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall for (UnresolvedSetIterator I = SpecBegin; I != SpecEnd; ++I) { 2304c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall FunctionTemplateDecl *Challenger 2305c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall = cast<FunctionDecl>(*I)->getPrimaryTemplate(); 2306d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (I != Best && 2307d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor !isSameTemplate(getMoreSpecializedTemplate(BestTemplate, Challenger, 23085769d6195087229770d7ac90449443e026c47103John McCall Loc, TPOC), 2309d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor BestTemplate)) { 2310d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Ambiguous = true; 2311d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor break; 2312d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 2313d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 2314d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2315d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor if (!Ambiguous) { 2316d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // We found an answer. Return it. 2317c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return Best; 2318d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor } 2319d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2320d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // Diagnose the ambiguity. 2321d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor Diag(Loc, AmbigDiag); 2322d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2323d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor // FIXME: Can we order the candidates in some sane way? 2324c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall for (UnresolvedSetIterator I = SpecBegin; I != SpecEnd; ++I) 2325c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall Diag((*I)->getLocation(), CandidateDiag) 2326d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor << getTemplateArgumentBindingsText( 2327c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall cast<FunctionDecl>(*I)->getPrimaryTemplate()->getTemplateParameters(), 2328c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall *cast<FunctionDecl>(*I)->getTemplateSpecializationArgs()); 2329d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2330c373d48502ca7683ab55385f5bd624d778eb288dJohn McCall return SpecEnd; 2331d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor} 2332d5a423b279e787e9fdd8309fe52cb515388c54eaDouglas Gregor 2333bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \brief Returns the more specialized class template partial specialization 2334bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// according to the rules of partial ordering of class template partial 2335bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// specializations (C++ [temp.class.order]). 2336bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// 2337bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \param PS1 the first class template partial specialization 2338bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// 2339bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \param PS2 the second class template partial specialization 2340bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// 2341bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// \returns the more specialized class template partial specialization. If 2342bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor/// neither partial specialization is more specialized, returns NULL. 2343bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas GregorClassTemplatePartialSpecializationDecl * 2344bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas GregorSema::getMoreSpecializedPartialSpecialization( 2345bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor ClassTemplatePartialSpecializationDecl *PS1, 23465769d6195087229770d7ac90449443e026c47103John McCall ClassTemplatePartialSpecializationDecl *PS2, 23475769d6195087229770d7ac90449443e026c47103John McCall SourceLocation Loc) { 2348bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // C++ [temp.class.order]p1: 2349bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // For two class template partial specializations, the first is at least as 2350bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // specialized as the second if, given the following rewrite to two 2351bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // function templates, the first function template is at least as 2352bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // specialized as the second according to the ordering rules for function 2353bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // templates (14.6.6.2): 2354bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // - the first function template has the same template parameters as the 2355bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // first partial specialization and has a single function parameter 2356bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // whose type is a class template specialization with the template 2357bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // arguments of the first partial specialization, and 2358bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // - the second function template has the same template parameters as the 2359bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // second partial specialization and has a single function parameter 2360bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // whose type is a class template specialization with the template 2361bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // arguments of the second partial specialization. 2362bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // 236331dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // Rather than synthesize function templates, we merely perform the 236431dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // equivalent partial ordering by performing deduction directly on 236531dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // the template arguments of the class template partial 236631dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // specializations. This computation is slightly simpler than the 236731dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // general problem of function template partial ordering, because 236831dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // class template partial specializations are more constrained. We 236931dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // know that every template parameter is deducible from the class 237031dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // template partial specialization's template arguments, for 237131dce8f606c5ff4a51db67caa24ac3312ccea3f3Douglas Gregor // example. 237202024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVector<DeducedTemplateArgument, 4> Deduced; 23735769d6195087229770d7ac90449443e026c47103John McCall Sema::TemplateDeductionInfo Info(Context, Loc); 237431f17ecbef57b5679c017c375db330546b7b5145John McCall 237531f17ecbef57b5679c017c375db330546b7b5145John McCall QualType PT1 = PS1->getInjectedSpecializationType(); 237631f17ecbef57b5679c017c375db330546b7b5145John McCall QualType PT2 = PS2->getInjectedSpecializationType(); 2377bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor 2378bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // Determine whether PS1 is at least as specialized as PS2 2379bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Deduced.resize(PS2->getTemplateParameters()->size()); 2380a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth bool Better1 = !DeduceTemplateArgumentsDuringPartialOrdering(*this, 2381bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor PS2->getTemplateParameters(), 238231f17ecbef57b5679c017c375db330546b7b5145John McCall PT2, 238331f17ecbef57b5679c017c375db330546b7b5145John McCall PT1, 2384bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Info, 2385bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Deduced, 2386bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor 0); 2387516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor if (Better1) 2388516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor Better1 = !::FinishTemplateArgumentDeduction(*this, PS2, 2389516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor PS1->getTemplateArgs(), 2390516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor Deduced, Info); 2391516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor 2392bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor // Determine whether PS2 is at least as specialized as PS1 2393db0d4b751e83b8841b8f48f913f17e50467f13d4Douglas Gregor Deduced.clear(); 2394bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Deduced.resize(PS1->getTemplateParameters()->size()); 2395a7ef13024e4cc3dfb75e3bc1695371b39d9a5240Chandler Carruth bool Better2 = !DeduceTemplateArgumentsDuringPartialOrdering(*this, 2396bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor PS1->getTemplateParameters(), 239731f17ecbef57b5679c017c375db330546b7b5145John McCall PT1, 239831f17ecbef57b5679c017c375db330546b7b5145John McCall PT2, 2399bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Info, 2400bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor Deduced, 2401bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor 0); 2402516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor if (Better2) 2403516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor Better2 = !::FinishTemplateArgumentDeduction(*this, PS1, 2404516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor PS2->getTemplateArgs(), 2405516e6e09821a61e8975c787e189949723249e7c5Douglas Gregor Deduced, Info); 2406bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor 2407bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor if (Better1 == Better2) 2408bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor return 0; 2409bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor 2410bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor return Better1? PS1 : PS2; 2411bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor} 2412bf4ea56cdc376cef5a12abf6bf18dc34805c2226Douglas Gregor 24131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 2414e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorMarkUsedTemplateParameters(Sema &SemaRef, 2415e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor const TemplateArgument &TemplateArg, 2416e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 2417ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 2418e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Used); 2419031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2420e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 2421031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// expression. 24221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 2423e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorMarkUsedTemplateParameters(Sema &SemaRef, 2424e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor const Expr *E, 2425e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 2426ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 2427e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Used) { 2428e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor // FIXME: if !OnlyDeduced, we have to walk the whole subexpression to 2429e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor // find other occurrences of template parameters. 2430f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E); 2431c781f9cd854f3d5d1c826f4a13382c6abca4cff7Douglas Gregor if (!DRE) 2432031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor return; 2433031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 24341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const NonTypeTemplateParmDecl *NTTP 2435031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor = dyn_cast<NonTypeTemplateParmDecl>(DRE->getDecl()); 2436031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor if (!NTTP) 2437031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor return; 2438031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2439ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor if (NTTP->getDepth() == Depth) 2440ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used[NTTP->getIndex()] = true; 2441031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 2442031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2443e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 2444e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// nested name specifier. 2445e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregorstatic void 2446e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorMarkUsedTemplateParameters(Sema &SemaRef, 2447e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor NestedNameSpecifier *NNS, 2448e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 2449ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 2450e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Used) { 2451e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (!NNS) 2452e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor return; 2453e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor 2454ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor MarkUsedTemplateParameters(SemaRef, NNS->getPrefix(), OnlyDeduced, Depth, 2455ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used); 2456e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, QualType(NNS->getAsType(), 0), 2457ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 2458e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor} 2459e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor 2460e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 2461e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// template name. 2462e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregorstatic void 2463e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorMarkUsedTemplateParameters(Sema &SemaRef, 2464e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor TemplateName Name, 2465e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 2466ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 2467e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Used) { 2468e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2469e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (TemplateTemplateParmDecl *TTP 2470ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor = dyn_cast<TemplateTemplateParmDecl>(Template)) { 2471ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor if (TTP->getDepth() == Depth) 2472ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used[TTP->getIndex()] = true; 2473ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor } 2474e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor return; 2475e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor } 2476e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor 2477788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor if (QualifiedTemplateName *QTN = Name.getAsQualifiedTemplateName()) 2478788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor MarkUsedTemplateParameters(SemaRef, QTN->getQualifier(), OnlyDeduced, 2479788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor Depth, Used); 2480e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) 2481ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor MarkUsedTemplateParameters(SemaRef, DTN->getQualifier(), OnlyDeduced, 2482ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2483e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor} 2484e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor 2485e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by the given 2486031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// type. 24871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 2488e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorMarkUsedTemplateParameters(Sema &SemaRef, QualType T, 2489e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 2490ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 2491e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Used) { 2492e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (T.isNull()) 2493e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor return; 2494e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor 2495031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor // Non-dependent types have nothing deducible 2496031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor if (!T->isDependentType()) 2497031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor return; 2498031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2499031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor T = SemaRef.Context.getCanonicalType(T); 2500031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor switch (T->getTypeClass()) { 2501031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Pointer: 2502e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 2503e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<PointerType>(T)->getPointeeType(), 2504e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor OnlyDeduced, 2505ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, 2506e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor Used); 2507031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2508031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2509031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::BlockPointer: 2510e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 2511e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<BlockPointerType>(T)->getPointeeType(), 2512e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor OnlyDeduced, 2513ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, 2514e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor Used); 2515031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2516031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2517031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::LValueReference: 2518031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::RValueReference: 2519e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 2520e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<ReferenceType>(T)->getPointeeType(), 2521e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor OnlyDeduced, 2522ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, 2523e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor Used); 2524031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2525031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2526031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::MemberPointer: { 2527031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor const MemberPointerType *MemPtr = cast<MemberPointerType>(T.getTypePtr()); 2528e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, MemPtr->getPointeeType(), OnlyDeduced, 2529ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2530e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, QualType(MemPtr->getClass(), 0), 2531ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 2532031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2533031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 2534031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2535031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::DependentSizedArray: 2536e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 2537e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<DependentSizedArrayType>(T)->getSizeExpr(), 2538ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 2539031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor // Fall through to check the element type 2540031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2541031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::ConstantArray: 2542031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::IncompleteArray: 2543e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 2544e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<ArrayType>(T)->getElementType(), 2545ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 2546031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2547031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2548031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Vector: 2549031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::ExtVector: 2550e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 2551e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<VectorType>(T)->getElementType(), 2552ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 2553031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2554031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 25559cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor case Type::DependentSizedExtVector: { 25569cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor const DependentSizedExtVectorType *VecType 2557f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor = cast<DependentSizedExtVectorType>(T); 2558e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, VecType->getElementType(), OnlyDeduced, 2559ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2560e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, VecType->getSizeExpr(), OnlyDeduced, 2561ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 25629cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor break; 25639cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor } 25649cdda0cf8528e3d595be9bfa002f0450074beb4dDouglas Gregor 2565031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::FunctionProto: { 2566f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor const FunctionProtoType *Proto = cast<FunctionProtoType>(T); 2567e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, Proto->getResultType(), OnlyDeduced, 2568ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2569031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor for (unsigned I = 0, N = Proto->getNumArgs(); I != N; ++I) 2570e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, Proto->getArgType(I), OnlyDeduced, 2571ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2572031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2573031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 2574031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2575ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor case Type::TemplateTypeParm: { 2576ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor const TemplateTypeParmType *TTP = cast<TemplateTypeParmType>(T); 2577ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor if (TTP->getDepth() == Depth) 2578ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used[TTP->getIndex()] = true; 2579031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2580ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor } 2581031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 258231f17ecbef57b5679c017c375db330546b7b5145John McCall case Type::InjectedClassName: 258331f17ecbef57b5679c017c375db330546b7b5145John McCall T = cast<InjectedClassNameType>(T)->getInjectedSpecializationType(); 258431f17ecbef57b5679c017c375db330546b7b5145John McCall // fall through 258531f17ecbef57b5679c017c375db330546b7b5145John McCall 2586031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::TemplateSpecialization: { 25871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump const TemplateSpecializationType *Spec 2588f6ddb737cb882ffbf0b75a9abd50b930cc2b9068Douglas Gregor = cast<TemplateSpecializationType>(T); 2589e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, Spec->getTemplateName(), OnlyDeduced, 2590ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2591e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor for (unsigned I = 0, N = Spec->getNumArgs(); I != N; ++I) 2592ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor MarkUsedTemplateParameters(SemaRef, Spec->getArg(I), OnlyDeduced, Depth, 2593ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Used); 2594e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor break; 2595e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor } 25961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2597e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor case Type::Complex: 2598e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (!OnlyDeduced) 2599e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 2600e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor cast<ComplexType>(T)->getElementType(), 2601ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 2602e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor break; 2603031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 26044714c12a1ab759156b78be8f109ea4c12213af57Douglas Gregor case Type::DependentName: 2605e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor if (!OnlyDeduced) 2606e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, 26074714c12a1ab759156b78be8f109ea4c12213af57Douglas Gregor cast<DependentNameType>(T)->getQualifier(), 2608ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor OnlyDeduced, Depth, Used); 2609031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2610031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2611ad5e73887052193afda72db8efcb812bd083a4a8John McCall case Type::TypeOf: 2612ad5e73887052193afda72db8efcb812bd083a4a8John McCall if (!OnlyDeduced) 2613ad5e73887052193afda72db8efcb812bd083a4a8John McCall MarkUsedTemplateParameters(SemaRef, 2614ad5e73887052193afda72db8efcb812bd083a4a8John McCall cast<TypeOfType>(T)->getUnderlyingType(), 2615ad5e73887052193afda72db8efcb812bd083a4a8John McCall OnlyDeduced, Depth, Used); 2616ad5e73887052193afda72db8efcb812bd083a4a8John McCall break; 2617ad5e73887052193afda72db8efcb812bd083a4a8John McCall 2618ad5e73887052193afda72db8efcb812bd083a4a8John McCall case Type::TypeOfExpr: 2619ad5e73887052193afda72db8efcb812bd083a4a8John McCall if (!OnlyDeduced) 2620ad5e73887052193afda72db8efcb812bd083a4a8John McCall MarkUsedTemplateParameters(SemaRef, 2621ad5e73887052193afda72db8efcb812bd083a4a8John McCall cast<TypeOfExprType>(T)->getUnderlyingExpr(), 2622ad5e73887052193afda72db8efcb812bd083a4a8John McCall OnlyDeduced, Depth, Used); 2623ad5e73887052193afda72db8efcb812bd083a4a8John McCall break; 2624ad5e73887052193afda72db8efcb812bd083a4a8John McCall 2625ad5e73887052193afda72db8efcb812bd083a4a8John McCall case Type::Decltype: 2626ad5e73887052193afda72db8efcb812bd083a4a8John McCall if (!OnlyDeduced) 2627ad5e73887052193afda72db8efcb812bd083a4a8John McCall MarkUsedTemplateParameters(SemaRef, 2628ad5e73887052193afda72db8efcb812bd083a4a8John McCall cast<DecltypeType>(T)->getUnderlyingExpr(), 2629ad5e73887052193afda72db8efcb812bd083a4a8John McCall OnlyDeduced, Depth, Used); 2630ad5e73887052193afda72db8efcb812bd083a4a8John McCall break; 2631ad5e73887052193afda72db8efcb812bd083a4a8John McCall 2632e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor // None of these types have any template parameters in them. 2633031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Builtin: 2634031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::VariableArray: 2635031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::FunctionNoProto: 2636031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Record: 2637031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::Enum: 2638031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case Type::ObjCInterface: 2639d1b3c2dd5bc1f3103bee6137957aa7c5f8f2f0bcSteve Naroff case Type::ObjCObjectPointer: 2640ed97649e9574b9d854fa4d6109c9333ae0993554John McCall case Type::UnresolvedUsing: 2641031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define TYPE(Class, Base) 2642031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define ABSTRACT_TYPE(Class, Base) 2643031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define DEPENDENT_TYPE(Class, Base) 2644031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 2645031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor#include "clang/AST/TypeNodes.def" 2646031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2647031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 2648031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 2649031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2650e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor/// \brief Mark the template parameters that are used by this 2651031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// template argument. 26521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic void 2653e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorMarkUsedTemplateParameters(Sema &SemaRef, 2654e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor const TemplateArgument &TemplateArg, 2655e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor bool OnlyDeduced, 2656ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor unsigned Depth, 2657e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Used) { 2658031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor switch (TemplateArg.getKind()) { 2659031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Null: 2660031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Integral: 2661788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Declaration: 2662031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 26631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2664031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Type: 2665e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, TemplateArg.getAsType(), OnlyDeduced, 2666ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2667031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2668031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2669788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor case TemplateArgument::Template: 2670788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor MarkUsedTemplateParameters(SemaRef, TemplateArg.getAsTemplate(), 2671788cd06cf8e868a67158aafec5de3a1f408d14f3Douglas Gregor OnlyDeduced, Depth, Used); 2672031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2673031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2674031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor case TemplateArgument::Expression: 2675e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor MarkUsedTemplateParameters(SemaRef, TemplateArg.getAsExpr(), OnlyDeduced, 2676ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2677031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor break; 2678e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor 2679d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson case TemplateArgument::Pack: 2680e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor for (TemplateArgument::pack_iterator P = TemplateArg.pack_begin(), 2681e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor PEnd = TemplateArg.pack_end(); 2682e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor P != PEnd; ++P) 2683ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor MarkUsedTemplateParameters(SemaRef, *P, OnlyDeduced, Depth, Used); 2684d01b1da213aeb71fd40ff7fb78a194613cc1ece7Anders Carlsson break; 2685031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor } 2686031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 2687031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor 2688031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// \brief Mark the template parameters can be deduced by the given 2689031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// template argument list. 2690031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// 2691031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// \param TemplateArgs the template argument list from which template 2692031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// parameters will be deduced. 2693031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// 2694031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// \param Deduced a bit vector whose elements will be set to \c true 2695031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// to indicate when the corresponding template parameter will be 2696031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor/// deduced. 26971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpvoid 2698e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas GregorSema::MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 2699ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor bool OnlyDeduced, unsigned Depth, 2700e73bb60de3c7c60453a86e097fc428d1cd367a42Douglas Gregor llvm::SmallVectorImpl<bool> &Used) { 2701031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor for (unsigned I = 0, N = TemplateArgs.size(); I != N; ++I) 2702ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor ::MarkUsedTemplateParameters(*this, TemplateArgs[I], OnlyDeduced, 2703ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor Depth, Used); 2704031a5880e19d06624551aed9d74594356f4f9db1Douglas Gregor} 270563f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor 270663f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor/// \brief Marks all of the template parameters that will be deduced by a 270763f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor/// call to the given function template. 270802024a9f0d8e6c898de276193af604c42ee41269Douglas Gregorvoid 270902024a9f0d8e6c898de276193af604c42ee41269Douglas GregorSema::MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 271002024a9f0d8e6c898de276193af604c42ee41269Douglas Gregor llvm::SmallVectorImpl<bool> &Deduced) { 271163f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor TemplateParameterList *TemplateParams 271263f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor = FunctionTemplate->getTemplateParameters(); 271363f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor Deduced.clear(); 271463f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor Deduced.resize(TemplateParams->size()); 271563f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor 271663f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor FunctionDecl *Function = FunctionTemplate->getTemplatedDecl(); 271763f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor for (unsigned I = 0, N = Function->getNumParams(); I != N; ++I) 271863f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor ::MarkUsedTemplateParameters(*this, Function->getParamDecl(I)->getType(), 2719ed9c0f90b7e0811c209b95e39fe07c211c531285Douglas Gregor true, TemplateParams->getDepth(), Deduced); 272063f07c55d58951574afe9bbb9f7cb3f92eecdd9bDouglas Gregor} 2721