Sema.h revision 308742c87e2311c3f349092e5b823c3821e61b10
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "clang/Basic/ExpressionTraits.h" 31#include "llvm/ADT/OwningPtr.h" 32#include "llvm/ADT/SmallPtrSet.h" 33#include "llvm/ADT/SmallVector.h" 34#include <deque> 35#include <string> 36 37namespace llvm { 38 class APSInt; 39 template <typename ValueT> struct DenseMapInfo; 40 template <typename ValueT, typename ValueInfoT> class DenseSet; 41} 42 43namespace clang { 44 class ADLResult; 45 class ASTConsumer; 46 class ASTContext; 47 class ASTMutationListener; 48 class ArrayType; 49 class AttributeList; 50 class BlockDecl; 51 class CXXBasePath; 52 class CXXBasePaths; 53 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 54 class CXXConstructorDecl; 55 class CXXConversionDecl; 56 class CXXDestructorDecl; 57 class CXXFieldCollector; 58 class CXXMemberCallExpr; 59 class CXXMethodDecl; 60 class CXXScopeSpec; 61 class CXXTemporary; 62 class CXXTryStmt; 63 class CallExpr; 64 class ClassTemplateDecl; 65 class ClassTemplatePartialSpecializationDecl; 66 class ClassTemplateSpecializationDecl; 67 class CodeCompleteConsumer; 68 class CodeCompletionAllocator; 69 class CodeCompletionResult; 70 class Decl; 71 class DeclAccessPair; 72 class DeclContext; 73 class DeclRefExpr; 74 class DeclaratorDecl; 75 class DeducedTemplateArgument; 76 class DependentDiagnostic; 77 class DesignatedInitExpr; 78 class Designation; 79 class EnumConstantDecl; 80 class Expr; 81 class ExtVectorType; 82 class ExternalSemaSource; 83 class FormatAttr; 84 class FriendDecl; 85 class FunctionDecl; 86 class FunctionProtoType; 87 class FunctionTemplateDecl; 88 class ImplicitConversionSequence; 89 class InitListExpr; 90 class InitializationKind; 91 class InitializationSequence; 92 class InitializedEntity; 93 class IntegerLiteral; 94 class LabelStmt; 95 class LangOptions; 96 class LocalInstantiationScope; 97 class LookupResult; 98 class MacroInfo; 99 class MultiLevelTemplateArgumentList; 100 class NamedDecl; 101 class NonNullAttr; 102 class ObjCCategoryDecl; 103 class ObjCCategoryImplDecl; 104 class ObjCCompatibleAliasDecl; 105 class ObjCContainerDecl; 106 class ObjCImplDecl; 107 class ObjCImplementationDecl; 108 class ObjCInterfaceDecl; 109 class ObjCIvarDecl; 110 template <class T> class ObjCList; 111 class ObjCMethodDecl; 112 class ObjCPropertyDecl; 113 class ObjCProtocolDecl; 114 class OverloadCandidateSet; 115 class OverloadExpr; 116 class ParenListExpr; 117 class ParmVarDecl; 118 class Preprocessor; 119 class PseudoDestructorTypeStorage; 120 class QualType; 121 class StandardConversionSequence; 122 class Stmt; 123 class StringLiteral; 124 class SwitchStmt; 125 class TargetAttributesSema; 126 class TemplateArgument; 127 class TemplateArgumentList; 128 class TemplateArgumentLoc; 129 class TemplateDecl; 130 class TemplateParameterList; 131 class TemplatePartialOrderingContext; 132 class TemplateTemplateParmDecl; 133 class Token; 134 class TypeAliasDecl; 135 class TypedefDecl; 136 class TypedefNameDecl; 137 class TypeLoc; 138 class UnqualifiedId; 139 class UnresolvedLookupExpr; 140 class UnresolvedMemberExpr; 141 class UnresolvedSetImpl; 142 class UnresolvedSetIterator; 143 class UsingDecl; 144 class UsingShadowDecl; 145 class ValueDecl; 146 class VarDecl; 147 class VisibilityAttr; 148 class VisibleDeclConsumer; 149 class IndirectFieldDecl; 150 151namespace sema { 152 class AccessedEntity; 153 class BlockScopeInfo; 154 class DelayedDiagnostic; 155 class FunctionScopeInfo; 156 class TemplateDeductionInfo; 157} 158 159/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 160/// parsing. 161/// 162/// LocInfoType is a "transient" type, only needed for passing to/from Parser 163/// and Sema, when we want to preserve type source info for a parsed type. 164/// It will not participate in the type system semantics in any way. 165class LocInfoType : public Type { 166 enum { 167 // The last number that can fit in Type's TC. 168 // Avoids conflict with an existing Type class. 169 LocInfo = Type::TypeLast + 1 170 }; 171 172 TypeSourceInfo *DeclInfo; 173 174 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 175 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 176 ty->isVariablyModifiedType(), 177 ty->containsUnexpandedParameterPack()), 178 DeclInfo(TInfo) { 179 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 180 } 181 friend class Sema; 182 183public: 184 QualType getType() const { return getCanonicalTypeInternal(); } 185 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 186 187 void getAsStringInternal(std::string &Str, 188 const PrintingPolicy &Policy) const; 189 190 static bool classof(const Type *T) { 191 return T->getTypeClass() == (TypeClass)LocInfo; 192 } 193 static bool classof(const LocInfoType *) { return true; } 194}; 195 196// FIXME: No way to easily map from TemplateTypeParmTypes to 197// TemplateTypeParmDecls, so we have this horrible PointerUnion. 198typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 199 SourceLocation> UnexpandedParameterPack; 200 201/// Sema - This implements semantic analysis and AST building for C. 202class Sema { 203 Sema(const Sema&); // DO NOT IMPLEMENT 204 void operator=(const Sema&); // DO NOT IMPLEMENT 205 mutable const TargetAttributesSema* TheTargetAttributesSema; 206public: 207 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 208 typedef OpaquePtr<TemplateName> TemplateTy; 209 typedef OpaquePtr<QualType> TypeTy; 210 typedef Attr AttrTy; 211 typedef CXXBaseSpecifier BaseTy; 212 typedef CXXCtorInitializer MemInitTy; 213 typedef Expr ExprTy; 214 typedef Stmt StmtTy; 215 typedef TemplateParameterList TemplateParamsTy; 216 typedef NestedNameSpecifier CXXScopeTy; 217 218 OpenCLOptions OpenCLFeatures; 219 FPOptions FPFeatures; 220 221 const LangOptions &LangOpts; 222 Preprocessor &PP; 223 ASTContext &Context; 224 ASTConsumer &Consumer; 225 Diagnostic &Diags; 226 SourceManager &SourceMgr; 227 228 /// \brief Source of additional semantic information. 229 ExternalSemaSource *ExternalSource; 230 231 /// \brief Code-completion consumer. 232 CodeCompleteConsumer *CodeCompleter; 233 234 /// CurContext - This is the current declaration context of parsing. 235 DeclContext *CurContext; 236 237 /// VAListTagName - The declaration name corresponding to __va_list_tag. 238 /// This is used as part of a hack to omit that class from ADL results. 239 DeclarationName VAListTagName; 240 241 /// PackContext - Manages the stack for #pragma pack. An alignment 242 /// of 0 indicates default alignment. 243 void *PackContext; // Really a "PragmaPackStack*" 244 245 bool MSStructPragmaOn; // True when #pragma ms_struct on 246 247 /// VisContext - Manages the stack for #pragma GCC visibility. 248 void *VisContext; // Really a "PragmaVisStack*" 249 250 /// \brief Stack containing information about each of the nested 251 /// function, block, and method scopes that are currently active. 252 /// 253 /// This array is never empty. Clients should ignore the first 254 /// element, which is used to cache a single FunctionScopeInfo 255 /// that's used to parse every top-level function. 256 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 257 258 /// ExprTemporaries - This is the stack of temporaries that are created by 259 /// the current full expression. 260 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 261 262 /// ExtVectorDecls - This is a list all the extended vector types. This allows 263 /// us to associate a raw vector type with one of the ext_vector type names. 264 /// This is only necessary for issuing pretty diagnostics. 265 llvm::SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 266 267 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 268 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 269 270 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 271 272 /// PureVirtualClassDiagSet - a set of class declarations which we have 273 /// emitted a list of pure virtual functions. Used to prevent emitting the 274 /// same list more than once. 275 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 276 277 /// ParsingInitForAutoVars - a set of declarations with auto types for which 278 /// we are currently parsing the initializer. 279 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 280 281 /// \brief A mapping from external names to the most recent 282 /// locally-scoped external declaration with that name. 283 /// 284 /// This map contains external declarations introduced in local 285 /// scoped, e.g., 286 /// 287 /// \code 288 /// void f() { 289 /// void foo(int, int); 290 /// } 291 /// \endcode 292 /// 293 /// Here, the name "foo" will be associated with the declaration on 294 /// "foo" within f. This name is not visible outside of 295 /// "f". However, we still find it in two cases: 296 /// 297 /// - If we are declaring another external with the name "foo", we 298 /// can find "foo" as a previous declaration, so that the types 299 /// of this external declaration can be checked for 300 /// compatibility. 301 /// 302 /// - If we would implicitly declare "foo" (e.g., due to a call to 303 /// "foo" in C when no prototype or definition is visible), then 304 /// we find this declaration of "foo" and complain that it is 305 /// not visible. 306 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 307 308 /// \brief All the tentative definitions encountered in the TU. 309 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 310 311 /// \brief The set of file scoped decls seen so far that have not been used 312 /// and must warn if not used. Only contains the first declaration. 313 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 314 315 /// \brief All the delegating constructors seen so far in the file, used for 316 /// cycle detection at the end of the TU. 317 llvm::SmallVector<CXXConstructorDecl*, 4> DelegatingCtorDecls; 318 319 /// \brief All the overriding destructors seen during a class definition 320 /// (there could be multiple due to nested classes) that had their exception 321 /// spec checks delayed, plus the overridden destructor. 322 llvm::SmallVector<std::pair<const CXXDestructorDecl*, 323 const CXXDestructorDecl*>, 2> 324 DelayedDestructorExceptionSpecChecks; 325 326 /// \brief Callback to the parser to parse templated functions when needed. 327 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 328 LateTemplateParserCB *LateTemplateParser; 329 void *OpaqueParser; 330 331 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 332 LateTemplateParser = LTP; 333 OpaqueParser = P; 334 } 335 336 class DelayedDiagnostics; 337 338 class ParsingDeclState { 339 unsigned SavedStackSize; 340 friend class Sema::DelayedDiagnostics; 341 }; 342 343 class ProcessingContextState { 344 unsigned SavedParsingDepth; 345 unsigned SavedActiveStackBase; 346 friend class Sema::DelayedDiagnostics; 347 }; 348 349 /// A class which encapsulates the logic for delaying diagnostics 350 /// during parsing and other processing. 351 class DelayedDiagnostics { 352 /// \brief The stack of diagnostics that were delayed due to being 353 /// produced during the parsing of a declaration. 354 sema::DelayedDiagnostic *Stack; 355 356 /// \brief The number of objects on the delayed-diagnostics stack. 357 unsigned StackSize; 358 359 /// \brief The current capacity of the delayed-diagnostics stack. 360 unsigned StackCapacity; 361 362 /// \brief The index of the first "active" delayed diagnostic in 363 /// the stack. When parsing class definitions, we ignore active 364 /// delayed diagnostics from the surrounding context. 365 unsigned ActiveStackBase; 366 367 /// \brief The depth of the declarations we're currently parsing. 368 /// This gets saved and reset whenever we enter a class definition. 369 unsigned ParsingDepth; 370 371 public: 372 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 373 ActiveStackBase(0), ParsingDepth(0) {} 374 375 ~DelayedDiagnostics() { 376 delete[] reinterpret_cast<char*>(Stack); 377 } 378 379 /// Adds a delayed diagnostic. 380 void add(const sema::DelayedDiagnostic &diag); 381 382 /// Determines whether diagnostics should be delayed. 383 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 384 385 /// Observe that we've started parsing a declaration. Access and 386 /// deprecation diagnostics will be delayed; when the declaration 387 /// is completed, all active delayed diagnostics will be evaluated 388 /// in its context, and then active diagnostics stack will be 389 /// popped down to the saved depth. 390 ParsingDeclState pushParsingDecl() { 391 ParsingDepth++; 392 393 ParsingDeclState state; 394 state.SavedStackSize = StackSize; 395 return state; 396 } 397 398 /// Observe that we're completed parsing a declaration. 399 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 400 401 /// Observe that we've started processing a different context, the 402 /// contents of which are semantically separate from the 403 /// declarations it may lexically appear in. This sets aside the 404 /// current stack of active diagnostics and starts afresh. 405 ProcessingContextState pushContext() { 406 assert(StackSize >= ActiveStackBase); 407 408 ProcessingContextState state; 409 state.SavedParsingDepth = ParsingDepth; 410 state.SavedActiveStackBase = ActiveStackBase; 411 412 ActiveStackBase = StackSize; 413 ParsingDepth = 0; 414 415 return state; 416 } 417 418 /// Observe that we've stopped processing a context. This 419 /// restores the previous stack of active diagnostics. 420 void popContext(ProcessingContextState state) { 421 assert(ActiveStackBase == StackSize); 422 assert(ParsingDepth == 0); 423 ActiveStackBase = state.SavedActiveStackBase; 424 ParsingDepth = state.SavedParsingDepth; 425 } 426 } DelayedDiagnostics; 427 428 /// A RAII object to temporarily push a declaration context. 429 class ContextRAII { 430 private: 431 Sema &S; 432 DeclContext *SavedContext; 433 ProcessingContextState SavedContextState; 434 435 public: 436 ContextRAII(Sema &S, DeclContext *ContextToPush) 437 : S(S), SavedContext(S.CurContext), 438 SavedContextState(S.DelayedDiagnostics.pushContext()) 439 { 440 assert(ContextToPush && "pushing null context"); 441 S.CurContext = ContextToPush; 442 } 443 444 void pop() { 445 if (!SavedContext) return; 446 S.CurContext = SavedContext; 447 S.DelayedDiagnostics.popContext(SavedContextState); 448 SavedContext = 0; 449 } 450 451 ~ContextRAII() { 452 pop(); 453 } 454 }; 455 456 /// WeakUndeclaredIdentifiers - Identifiers contained in 457 /// #pragma weak before declared. rare. may alias another 458 /// identifier, declared or undeclared 459 class WeakInfo { 460 IdentifierInfo *alias; // alias (optional) 461 SourceLocation loc; // for diagnostics 462 bool used; // identifier later declared? 463 public: 464 WeakInfo() 465 : alias(0), loc(SourceLocation()), used(false) {} 466 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 467 : alias(Alias), loc(Loc), used(false) {} 468 inline IdentifierInfo * getAlias() const { return alias; } 469 inline SourceLocation getLocation() const { return loc; } 470 void setUsed(bool Used=true) { used = Used; } 471 inline bool getUsed() { return used; } 472 bool operator==(WeakInfo RHS) const { 473 return alias == RHS.getAlias() && loc == RHS.getLocation(); 474 } 475 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 476 }; 477 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 478 479 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 480 /// #pragma weak during processing of other Decls. 481 /// I couldn't figure out a clean way to generate these in-line, so 482 /// we store them here and handle separately -- which is a hack. 483 /// It would be best to refactor this. 484 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 485 486 IdentifierResolver IdResolver; 487 488 /// Translation Unit Scope - useful to Objective-C actions that need 489 /// to lookup file scope declarations in the "ordinary" C decl namespace. 490 /// For example, user-defined classes, built-in "id" type, etc. 491 Scope *TUScope; 492 493 /// \brief The C++ "std" namespace, where the standard library resides. 494 LazyDeclPtr StdNamespace; 495 496 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 497 /// standard library. 498 LazyDeclPtr StdBadAlloc; 499 500 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 501 RecordDecl *CXXTypeInfoDecl; 502 503 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 504 RecordDecl *MSVCGuidDecl; 505 506 /// A flag to remember whether the implicit forms of operator new and delete 507 /// have been declared. 508 bool GlobalNewDeleteDeclared; 509 510 /// \brief The set of declarations that have been referenced within 511 /// a potentially evaluated expression. 512 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 513 PotentiallyReferencedDecls; 514 515 /// \brief A set of diagnostics that may be emitted. 516 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 517 PotentiallyEmittedDiagnostics; 518 519 /// \brief Describes how the expressions currently being parsed are 520 /// evaluated at run-time, if at all. 521 enum ExpressionEvaluationContext { 522 /// \brief The current expression and its subexpressions occur within an 523 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 524 /// or the subexpression of \c sizeof, where the type or the value of the 525 /// expression may be significant but no code will be generated to evaluate 526 /// the value of the expression at run time. 527 Unevaluated, 528 529 /// \brief The current expression is potentially evaluated at run time, 530 /// which means that code may be generated to evaluate the value of the 531 /// expression at run time. 532 PotentiallyEvaluated, 533 534 /// \brief The current expression may be potentially evaluated or it may 535 /// be unevaluated, but it is impossible to tell from the lexical context. 536 /// This evaluation context is used primary for the operand of the C++ 537 /// \c typeid expression, whose argument is potentially evaluated only when 538 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 539 PotentiallyPotentiallyEvaluated, 540 541 /// \brief The current expression is potentially evaluated, but any 542 /// declarations referenced inside that expression are only used if 543 /// in fact the current expression is used. 544 /// 545 /// This value is used when parsing default function arguments, for which 546 /// we would like to provide diagnostics (e.g., passing non-POD arguments 547 /// through varargs) but do not want to mark declarations as "referenced" 548 /// until the default argument is used. 549 PotentiallyEvaluatedIfUsed 550 }; 551 552 /// \brief Data structure used to record current or nested 553 /// expression evaluation contexts. 554 struct ExpressionEvaluationContextRecord { 555 /// \brief The expression evaluation context. 556 ExpressionEvaluationContext Context; 557 558 /// \brief The number of temporaries that were active when we 559 /// entered this expression evaluation context. 560 unsigned NumTemporaries; 561 562 /// \brief The set of declarations referenced within a 563 /// potentially potentially-evaluated context. 564 /// 565 /// When leaving a potentially potentially-evaluated context, each 566 /// of these elements will be as referenced if the corresponding 567 /// potentially potentially evaluated expression is potentially 568 /// evaluated. 569 PotentiallyReferencedDecls *PotentiallyReferenced; 570 571 /// \brief The set of diagnostics to emit should this potentially 572 /// potentially-evaluated context become evaluated. 573 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 574 575 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 576 unsigned NumTemporaries) 577 : Context(Context), NumTemporaries(NumTemporaries), 578 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 579 580 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 581 if (!PotentiallyReferenced) 582 PotentiallyReferenced = new PotentiallyReferencedDecls; 583 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 584 } 585 586 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 587 if (!PotentiallyDiagnosed) 588 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 589 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 590 } 591 592 void Destroy() { 593 delete PotentiallyReferenced; 594 delete PotentiallyDiagnosed; 595 PotentiallyReferenced = 0; 596 PotentiallyDiagnosed = 0; 597 } 598 }; 599 600 /// A stack of expression evaluation contexts. 601 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 602 603 /// SpecialMemberOverloadResult - The overloading result for a special member 604 /// function. 605 /// 606 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 607 /// integer is used to determine whether we have a parameter qualification 608 /// match, the second-lowest is whether we had success in resolving the 609 /// overload to a unique non-deleted function. 610 /// 611 /// The ConstParamMatch bit represents whether, when looking up a copy 612 /// constructor or assignment operator, we found a potential copy 613 /// constructor/assignment operator whose first parameter is const-qualified. 614 /// This is used for determining parameter types of other objects and is 615 /// utterly meaningless on other types of special members. 616 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 617 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 618 public: 619 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 620 : FastFoldingSetNode(ID) 621 {} 622 623 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 624 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 625 626 bool hasSuccess() const { return Pair.getInt() & 0x1; } 627 void setSuccess(bool B) { Pair.setInt(B | hasConstParamMatch() << 1); } 628 629 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 630 void setConstParamMatch(bool B) { Pair.setInt(B << 1 | hasSuccess()); } 631 }; 632 633 /// \brief A cache of special member function overload resolution results 634 /// for C++ records. 635 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 636 637 /// \brief Whether the code handled by Sema should be considered a 638 /// complete translation unit or not. 639 /// 640 /// When true (which is generally the case), Sema will perform 641 /// end-of-translation-unit semantic tasks (such as creating 642 /// initializers for tentative definitions in C) once parsing has 643 /// completed. This flag will be false when building PCH files, 644 /// since a PCH file is by definition not a complete translation 645 /// unit. 646 bool CompleteTranslationUnit; 647 648 llvm::BumpPtrAllocator BumpAlloc; 649 650 /// \brief The number of SFINAE diagnostics that have been trapped. 651 unsigned NumSFINAEErrors; 652 653 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 654 UnparsedDefaultArgInstantiationsMap; 655 656 /// \brief A mapping from parameters with unparsed default arguments to the 657 /// set of instantiations of each parameter. 658 /// 659 /// This mapping is a temporary data structure used when parsing 660 /// nested class templates or nested classes of class templates, 661 /// where we might end up instantiating an inner class before the 662 /// default arguments of its methods have been parsed. 663 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 664 665 // Contains the locations of the beginning of unparsed default 666 // argument locations. 667 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 668 669 /// UndefinedInternals - all the used, undefined objects with 670 /// internal linkage in this translation unit. 671 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 672 673 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 674 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 675 676 /// Method Pool - allows efficient lookup when typechecking messages to "id". 677 /// We need to maintain a list, since selectors can have differing signatures 678 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 679 /// of selectors are "overloaded"). 680 GlobalMethodPool MethodPool; 681 682 /// Method selectors used in a @selector expression. Used for implementation 683 /// of -Wselector. 684 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 685 686 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 687 688 /// Private Helper predicate to check for 'self'. 689 bool isSelfExpr(Expr *RExpr); 690public: 691 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 692 bool CompleteTranslationUnit = true, 693 CodeCompleteConsumer *CompletionConsumer = 0); 694 ~Sema(); 695 696 /// \brief Perform initialization that occurs after the parser has been 697 /// initialized but before it parses anything. 698 void Initialize(); 699 700 const LangOptions &getLangOptions() const { return LangOpts; } 701 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 702 FPOptions &getFPOptions() { return FPFeatures; } 703 704 Diagnostic &getDiagnostics() const { return Diags; } 705 SourceManager &getSourceManager() const { return SourceMgr; } 706 const TargetAttributesSema &getTargetAttributesSema() const; 707 Preprocessor &getPreprocessor() const { return PP; } 708 ASTContext &getASTContext() const { return Context; } 709 ASTConsumer &getASTConsumer() const { return Consumer; } 710 ASTMutationListener *getASTMutationListener() const; 711 712 /// \brief Helper class that creates diagnostics with optional 713 /// template instantiation stacks. 714 /// 715 /// This class provides a wrapper around the basic DiagnosticBuilder 716 /// class that emits diagnostics. SemaDiagnosticBuilder is 717 /// responsible for emitting the diagnostic (as DiagnosticBuilder 718 /// does) and, if the diagnostic comes from inside a template 719 /// instantiation, printing the template instantiation stack as 720 /// well. 721 class SemaDiagnosticBuilder : public DiagnosticBuilder { 722 Sema &SemaRef; 723 unsigned DiagID; 724 725 public: 726 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 727 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 728 729 explicit SemaDiagnosticBuilder(Sema &SemaRef) 730 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 731 732 ~SemaDiagnosticBuilder(); 733 }; 734 735 /// \brief Emit a diagnostic. 736 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 737 738 /// \brief Emit a partial diagnostic. 739 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 740 741 /// \brief Build a partial diagnostic. 742 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 743 744 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 745 746 ExprResult Owned(Expr* E) { return E; } 747 ExprResult Owned(ExprResult R) { return R; } 748 StmtResult Owned(Stmt* S) { return S; } 749 750 void ActOnEndOfTranslationUnit(); 751 752 void CheckDelegatingCtorCycles(); 753 754 Scope *getScopeForContext(DeclContext *Ctx); 755 756 void PushFunctionScope(); 757 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 758 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 759 const Decl *D = 0, const BlockExpr *blkExpr = 0); 760 761 sema::FunctionScopeInfo *getCurFunction() const { 762 return FunctionScopes.back(); 763 } 764 765 bool hasAnyErrorsInThisFunction() const; 766 767 /// \brief Retrieve the current block, if any. 768 sema::BlockScopeInfo *getCurBlock(); 769 770 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 771 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 772 773 //===--------------------------------------------------------------------===// 774 // Type Analysis / Processing: SemaType.cpp. 775 // 776 777 QualType adjustParameterType(QualType T); 778 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 779 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 780 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 781 } 782 QualType BuildPointerType(QualType T, 783 SourceLocation Loc, DeclarationName Entity); 784 QualType BuildReferenceType(QualType T, bool LValueRef, 785 SourceLocation Loc, DeclarationName Entity); 786 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 787 Expr *ArraySize, unsigned Quals, 788 SourceRange Brackets, DeclarationName Entity); 789 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 790 SourceLocation AttrLoc); 791 QualType BuildFunctionType(QualType T, 792 QualType *ParamTypes, unsigned NumParamTypes, 793 bool Variadic, unsigned Quals, 794 RefQualifierKind RefQualifier, 795 SourceLocation Loc, DeclarationName Entity, 796 FunctionType::ExtInfo Info); 797 QualType BuildMemberPointerType(QualType T, QualType Class, 798 SourceLocation Loc, 799 DeclarationName Entity); 800 QualType BuildBlockPointerType(QualType T, 801 SourceLocation Loc, DeclarationName Entity); 802 QualType BuildParenType(QualType T); 803 804 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 805 TagDecl **OwnedDecl = 0, 806 bool AllowAutoInTypeName = false); 807 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 808 TypeSourceInfo *ReturnTypeInfo); 809 /// \brief Package the given type and TSI into a ParsedType. 810 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 811 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 812 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 813 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 814 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 815 bool CheckDistantExceptionSpec(QualType T); 816 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 817 bool CheckEquivalentExceptionSpec( 818 const FunctionProtoType *Old, SourceLocation OldLoc, 819 const FunctionProtoType *New, SourceLocation NewLoc); 820 bool CheckEquivalentExceptionSpec( 821 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 822 const FunctionProtoType *Old, SourceLocation OldLoc, 823 const FunctionProtoType *New, SourceLocation NewLoc, 824 bool *MissingExceptionSpecification = 0, 825 bool *MissingEmptyExceptionSpecification = 0, 826 bool AllowNoexceptAllMatchWithNoSpec = false, 827 bool IsOperatorNew = false); 828 bool CheckExceptionSpecSubset( 829 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 830 const FunctionProtoType *Superset, SourceLocation SuperLoc, 831 const FunctionProtoType *Subset, SourceLocation SubLoc); 832 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 833 const FunctionProtoType *Target, SourceLocation TargetLoc, 834 const FunctionProtoType *Source, SourceLocation SourceLoc); 835 836 TypeResult ActOnTypeName(Scope *S, Declarator &D); 837 838 bool RequireCompleteType(SourceLocation Loc, QualType T, 839 const PartialDiagnostic &PD, 840 std::pair<SourceLocation, PartialDiagnostic> Note); 841 bool RequireCompleteType(SourceLocation Loc, QualType T, 842 const PartialDiagnostic &PD); 843 bool RequireCompleteType(SourceLocation Loc, QualType T, 844 unsigned DiagID); 845 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 846 std::pair<SourceLocation, 847 PartialDiagnostic> Note); 848 849 850 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 851 const CXXScopeSpec &SS, QualType T); 852 853 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 854 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 855 QualType BuildUnaryTransformType(QualType BaseType, 856 UnaryTransformType::UTTKind UKind, 857 SourceLocation Loc); 858 859 //===--------------------------------------------------------------------===// 860 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 861 // 862 863 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 864 865 void DiagnoseUseOfUnimplementedSelectors(); 866 867 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 868 Scope *S, CXXScopeSpec *SS = 0, 869 bool isClassName = false, 870 bool HasTrailingDot = false, 871 ParsedType ObjectType = ParsedType(), 872 bool WantNontrivialTypeSourceInfo = false); 873 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 874 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 875 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 876 SourceLocation IILoc, 877 Scope *S, 878 CXXScopeSpec *SS, 879 ParsedType &SuggestedType); 880 881 /// \brief Describes the result of the name lookup and resolution performed 882 /// by \c ClassifyName(). 883 enum NameClassificationKind { 884 NC_Unknown, 885 NC_Error, 886 NC_Keyword, 887 NC_Type, 888 NC_Expression, 889 NC_NestedNameSpecifier, 890 NC_TypeTemplate, 891 NC_FunctionTemplate 892 }; 893 894 class NameClassification { 895 NameClassificationKind Kind; 896 ExprResult Expr; 897 TemplateName Template; 898 ParsedType Type; 899 const IdentifierInfo *Keyword; 900 901 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 902 903 public: 904 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 905 906 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 907 908 NameClassification(const IdentifierInfo *Keyword) 909 : Kind(NC_Keyword), Keyword(Keyword) { } 910 911 static NameClassification Error() { 912 return NameClassification(NC_Error); 913 } 914 915 static NameClassification Unknown() { 916 return NameClassification(NC_Unknown); 917 } 918 919 static NameClassification NestedNameSpecifier() { 920 return NameClassification(NC_NestedNameSpecifier); 921 } 922 923 static NameClassification TypeTemplate(TemplateName Name) { 924 NameClassification Result(NC_TypeTemplate); 925 Result.Template = Name; 926 return Result; 927 } 928 929 static NameClassification FunctionTemplate(TemplateName Name) { 930 NameClassification Result(NC_FunctionTemplate); 931 Result.Template = Name; 932 return Result; 933 } 934 935 NameClassificationKind getKind() const { return Kind; } 936 937 ParsedType getType() const { 938 assert(Kind == NC_Type); 939 return Type; 940 } 941 942 ExprResult getExpression() const { 943 assert(Kind == NC_Expression); 944 return Expr; 945 } 946 947 TemplateName getTemplateName() const { 948 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 949 return Template; 950 } 951 952 TemplateNameKind getTemplateNameKind() const { 953 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 954 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 955 } 956}; 957 958 /// \brief Perform name lookup on the given name, classifying it based on 959 /// the results of name lookup and the following token. 960 /// 961 /// This routine is used by the parser to resolve identifiers and help direct 962 /// parsing. When the identifier cannot be found, this routine will attempt 963 /// to correct the typo and classify based on the resulting name. 964 /// 965 /// \param S The scope in which we're performing name lookup. 966 /// 967 /// \param SS The nested-name-specifier that precedes the name. 968 /// 969 /// \param Name The identifier. If typo correction finds an alternative name, 970 /// this pointer parameter will be updated accordingly. 971 /// 972 /// \param NameLoc The location of the identifier. 973 /// 974 /// \param NextToken The token following the identifier. Used to help 975 /// disambiguate the name. 976 NameClassification ClassifyName(Scope *S, 977 CXXScopeSpec &SS, 978 IdentifierInfo *&Name, 979 SourceLocation NameLoc, 980 const Token &NextToken); 981 982 Decl *ActOnDeclarator(Scope *S, Declarator &D, 983 bool IsFunctionDefintion = false); 984 985 Decl *HandleDeclarator(Scope *S, Declarator &D, 986 MultiTemplateParamsArg TemplateParameterLists, 987 bool IsFunctionDefinition); 988 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 989 const LookupResult &Previous, 990 Scope *S); 991 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 992 void DiagnoseFunctionSpecifiers(Declarator& D); 993 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 994 void CheckShadow(Scope *S, VarDecl *D); 995 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 996 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 997 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 998 QualType R, TypeSourceInfo *TInfo, 999 LookupResult &Previous, bool &Redeclaration); 1000 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1001 LookupResult &Previous, bool &Redeclaration); 1002 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1003 QualType R, TypeSourceInfo *TInfo, 1004 LookupResult &Previous, 1005 MultiTemplateParamsArg TemplateParamLists, 1006 bool &Redeclaration); 1007 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1008 bool &Redeclaration); 1009 void CheckCompleteVariableDeclaration(VarDecl *var); 1010 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1011 QualType R, TypeSourceInfo *TInfo, 1012 LookupResult &Previous, 1013 MultiTemplateParamsArg TemplateParamLists, 1014 bool IsFunctionDefinition, 1015 bool &Redeclaration); 1016 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1017 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1018 void CheckFunctionDeclaration(Scope *S, 1019 FunctionDecl *NewFD, LookupResult &Previous, 1020 bool IsExplicitSpecialization, 1021 bool &Redeclaration); 1022 void CheckMain(FunctionDecl *FD); 1023 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1024 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1025 SourceLocation Loc, 1026 QualType T); 1027 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1028 SourceLocation NameLoc, IdentifierInfo *Name, 1029 QualType T, TypeSourceInfo *TSInfo, 1030 StorageClass SC, StorageClass SCAsWritten); 1031 void ActOnParamDefaultArgument(Decl *param, 1032 SourceLocation EqualLoc, 1033 Expr *defarg); 1034 void ActOnParamUnparsedDefaultArgument(Decl *param, 1035 SourceLocation EqualLoc, 1036 SourceLocation ArgLoc); 1037 void ActOnParamDefaultArgumentError(Decl *param); 1038 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1039 SourceLocation EqualLoc); 1040 1041 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1042 bool TypeMayContainAuto); 1043 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1044 void ActOnInitializerError(Decl *Dcl); 1045 void ActOnCXXForRangeDecl(Decl *D); 1046 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1047 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1048 void FinalizeDeclaration(Decl *D); 1049 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1050 Decl **Group, 1051 unsigned NumDecls); 1052 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1053 bool TypeMayContainAuto = true); 1054 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1055 SourceLocation LocAfterDecls); 1056 void CheckForFunctionRedefinition(FunctionDecl *FD); 1057 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1058 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1059 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1060 1061 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1062 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1063 1064 /// \brief Diagnose any unused parameters in the given sequence of 1065 /// ParmVarDecl pointers. 1066 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1067 ParmVarDecl * const *End); 1068 1069 /// \brief Diagnose whether the size of parameters or return value of a 1070 /// function or obj-c method definition is pass-by-value and larger than a 1071 /// specified threshold. 1072 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1073 ParmVarDecl * const *End, 1074 QualType ReturnTy, 1075 NamedDecl *D); 1076 1077 void DiagnoseInvalidJumps(Stmt *Body); 1078 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1079 SourceLocation AsmLoc, 1080 SourceLocation RParenLoc); 1081 1082 /// Scope actions. 1083 void ActOnPopScope(SourceLocation Loc, Scope *S); 1084 void ActOnTranslationUnitScope(Scope *S); 1085 1086 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1087 DeclSpec &DS); 1088 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1089 DeclSpec &DS, 1090 MultiTemplateParamsArg TemplateParams); 1091 1092 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1093 1094 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1095 AccessSpecifier AS, 1096 RecordDecl *Record); 1097 1098 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1099 RecordDecl *Record); 1100 1101 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1102 TagTypeKind NewTag, 1103 SourceLocation NewTagLoc, 1104 const IdentifierInfo &Name); 1105 1106 enum TagUseKind { 1107 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1108 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1109 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1110 TUK_Friend // Friend declaration: 'friend struct foo;' 1111 }; 1112 1113 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1114 SourceLocation KWLoc, CXXScopeSpec &SS, 1115 IdentifierInfo *Name, SourceLocation NameLoc, 1116 AttributeList *Attr, AccessSpecifier AS, 1117 MultiTemplateParamsArg TemplateParameterLists, 1118 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1119 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1120 1121 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1122 unsigned TagSpec, SourceLocation TagLoc, 1123 CXXScopeSpec &SS, 1124 IdentifierInfo *Name, SourceLocation NameLoc, 1125 AttributeList *Attr, 1126 MultiTemplateParamsArg TempParamLists); 1127 1128 TypeResult ActOnDependentTag(Scope *S, 1129 unsigned TagSpec, 1130 TagUseKind TUK, 1131 const CXXScopeSpec &SS, 1132 IdentifierInfo *Name, 1133 SourceLocation TagLoc, 1134 SourceLocation NameLoc); 1135 1136 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1137 IdentifierInfo *ClassName, 1138 llvm::SmallVectorImpl<Decl *> &Decls); 1139 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1140 Declarator &D, Expr *BitfieldWidth); 1141 1142 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1143 Declarator &D, Expr *BitfieldWidth, 1144 AccessSpecifier AS); 1145 1146 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1147 TypeSourceInfo *TInfo, 1148 RecordDecl *Record, SourceLocation Loc, 1149 bool Mutable, Expr *BitfieldWidth, 1150 SourceLocation TSSL, 1151 AccessSpecifier AS, NamedDecl *PrevDecl, 1152 Declarator *D = 0); 1153 1154 enum CXXSpecialMember { 1155 CXXDefaultConstructor, 1156 CXXCopyConstructor, 1157 CXXMoveConstructor, 1158 CXXCopyAssignment, 1159 CXXMoveAssignment, 1160 CXXDestructor, 1161 CXXInvalid 1162 }; 1163 bool CheckNontrivialField(FieldDecl *FD); 1164 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1165 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1166 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1167 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 1168 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1169 Declarator &D, Expr *BitfieldWidth, 1170 tok::ObjCKeywordKind visibility); 1171 1172 // This is used for both record definitions and ObjC interface declarations. 1173 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1174 Decl **Fields, unsigned NumFields, 1175 SourceLocation LBrac, SourceLocation RBrac, 1176 AttributeList *AttrList); 1177 1178 /// ActOnTagStartDefinition - Invoked when we have entered the 1179 /// scope of a tag's definition (e.g., for an enumeration, class, 1180 /// struct, or union). 1181 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1182 1183 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1184 /// C++ record definition's base-specifiers clause and are starting its 1185 /// member declarations. 1186 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1187 SourceLocation FinalLoc, 1188 SourceLocation LBraceLoc); 1189 1190 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1191 /// the definition of a tag (enumeration, class, struct, or union). 1192 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1193 SourceLocation RBraceLoc); 1194 1195 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1196 /// error parsing the definition of a tag. 1197 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1198 1199 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1200 EnumConstantDecl *LastEnumConst, 1201 SourceLocation IdLoc, 1202 IdentifierInfo *Id, 1203 Expr *val); 1204 1205 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1206 SourceLocation IdLoc, IdentifierInfo *Id, 1207 AttributeList *Attrs, 1208 SourceLocation EqualLoc, Expr *Val); 1209 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1210 SourceLocation RBraceLoc, Decl *EnumDecl, 1211 Decl **Elements, unsigned NumElements, 1212 Scope *S, AttributeList *Attr); 1213 1214 DeclContext *getContainingDC(DeclContext *DC); 1215 1216 /// Set the current declaration context until it gets popped. 1217 void PushDeclContext(Scope *S, DeclContext *DC); 1218 void PopDeclContext(); 1219 1220 /// EnterDeclaratorContext - Used when we must lookup names in the context 1221 /// of a declarator's nested name specifier. 1222 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1223 void ExitDeclaratorContext(Scope *S); 1224 1225 DeclContext *getFunctionLevelDeclContext(); 1226 1227 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1228 /// to the function decl for the function being parsed. If we're currently 1229 /// in a 'block', this returns the containing context. 1230 FunctionDecl *getCurFunctionDecl(); 1231 1232 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1233 /// the method decl for the method being parsed. If we're currently 1234 /// in a 'block', this returns the containing context. 1235 ObjCMethodDecl *getCurMethodDecl(); 1236 1237 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1238 /// or C function we're in, otherwise return null. If we're currently 1239 /// in a 'block', this returns the containing context. 1240 NamedDecl *getCurFunctionOrMethodDecl(); 1241 1242 /// Add this decl to the scope shadowed decl chains. 1243 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1244 1245 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1246 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1247 /// true if 'D' belongs to the given declaration context. 1248 /// 1249 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1250 /// whether the declaration is in scope for the purposes of explicit template 1251 /// instantiation or specialization. The default is false. 1252 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1253 bool ExplicitInstantiationOrSpecialization = false); 1254 1255 /// Finds the scope corresponding to the given decl context, if it 1256 /// happens to be an enclosing scope. Otherwise return NULL. 1257 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1258 1259 /// Subroutines of ActOnDeclarator(). 1260 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1261 TypeSourceInfo *TInfo); 1262 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1263 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1264 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1265 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1266 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1267 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1268 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1269 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1270 1271 // AssignmentAction - This is used by all the assignment diagnostic functions 1272 // to represent what is actually causing the operation 1273 enum AssignmentAction { 1274 AA_Assigning, 1275 AA_Passing, 1276 AA_Returning, 1277 AA_Converting, 1278 AA_Initializing, 1279 AA_Sending, 1280 AA_Casting 1281 }; 1282 1283 /// C++ Overloading. 1284 enum OverloadKind { 1285 /// This is a legitimate overload: the existing declarations are 1286 /// functions or function templates with different signatures. 1287 Ovl_Overload, 1288 1289 /// This is not an overload because the signature exactly matches 1290 /// an existing declaration. 1291 Ovl_Match, 1292 1293 /// This is not an overload because the lookup results contain a 1294 /// non-function. 1295 Ovl_NonFunction 1296 }; 1297 OverloadKind CheckOverload(Scope *S, 1298 FunctionDecl *New, 1299 const LookupResult &OldDecls, 1300 NamedDecl *&OldDecl, 1301 bool IsForUsingDecl); 1302 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1303 1304 bool TryImplicitConversion(InitializationSequence &Sequence, 1305 const InitializedEntity &Entity, 1306 Expr *From, 1307 bool SuppressUserConversions, 1308 bool AllowExplicit, 1309 bool InOverloadResolution, 1310 bool CStyle); 1311 1312 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1313 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1314 bool IsComplexPromotion(QualType FromType, QualType ToType); 1315 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1316 bool InOverloadResolution, 1317 QualType& ConvertedType, bool &IncompatibleObjC); 1318 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1319 QualType& ConvertedType, bool &IncompatibleObjC); 1320 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1321 QualType& ConvertedType); 1322 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1323 const FunctionProtoType *NewType); 1324 1325 bool CheckPointerConversion(Expr *From, QualType ToType, 1326 CastKind &Kind, 1327 CXXCastPath& BasePath, 1328 bool IgnoreBaseAccess); 1329 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1330 bool InOverloadResolution, 1331 QualType &ConvertedType); 1332 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1333 CastKind &Kind, 1334 CXXCastPath &BasePath, 1335 bool IgnoreBaseAccess); 1336 bool IsQualificationConversion(QualType FromType, QualType ToType, 1337 bool CStyle); 1338 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1339 1340 1341 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1342 const VarDecl *NRVOCandidate, 1343 QualType ResultType, 1344 Expr *Value); 1345 1346 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1347 ExprResult Init); 1348 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1349 SourceLocation EqualLoc, 1350 ExprResult Init); 1351 ExprResult PerformObjectArgumentInitialization(Expr *From, 1352 NestedNameSpecifier *Qualifier, 1353 NamedDecl *FoundDecl, 1354 CXXMethodDecl *Method); 1355 1356 ExprResult PerformContextuallyConvertToBool(Expr *From); 1357 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1358 1359 ExprResult 1360 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1361 const PartialDiagnostic &NotIntDiag, 1362 const PartialDiagnostic &IncompleteDiag, 1363 const PartialDiagnostic &ExplicitConvDiag, 1364 const PartialDiagnostic &ExplicitConvNote, 1365 const PartialDiagnostic &AmbigDiag, 1366 const PartialDiagnostic &AmbigNote, 1367 const PartialDiagnostic &ConvDiag); 1368 1369 ExprResult PerformObjectMemberConversion(Expr *From, 1370 NestedNameSpecifier *Qualifier, 1371 NamedDecl *FoundDecl, 1372 NamedDecl *Member); 1373 1374 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1375 // TODO: make this is a typesafe union. 1376 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1377 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1378 1379 void AddOverloadCandidate(NamedDecl *Function, 1380 DeclAccessPair FoundDecl, 1381 Expr **Args, unsigned NumArgs, 1382 OverloadCandidateSet &CandidateSet); 1383 1384 void AddOverloadCandidate(FunctionDecl *Function, 1385 DeclAccessPair FoundDecl, 1386 Expr **Args, unsigned NumArgs, 1387 OverloadCandidateSet& CandidateSet, 1388 bool SuppressUserConversions = false, 1389 bool PartialOverloading = false); 1390 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1391 Expr **Args, unsigned NumArgs, 1392 OverloadCandidateSet& CandidateSet, 1393 bool SuppressUserConversions = false); 1394 void AddMethodCandidate(DeclAccessPair FoundDecl, 1395 QualType ObjectType, 1396 Expr::Classification ObjectClassification, 1397 Expr **Args, unsigned NumArgs, 1398 OverloadCandidateSet& CandidateSet, 1399 bool SuppressUserConversion = false); 1400 void AddMethodCandidate(CXXMethodDecl *Method, 1401 DeclAccessPair FoundDecl, 1402 CXXRecordDecl *ActingContext, QualType ObjectType, 1403 Expr::Classification ObjectClassification, 1404 Expr **Args, unsigned NumArgs, 1405 OverloadCandidateSet& CandidateSet, 1406 bool SuppressUserConversions = false); 1407 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1408 DeclAccessPair FoundDecl, 1409 CXXRecordDecl *ActingContext, 1410 TemplateArgumentListInfo *ExplicitTemplateArgs, 1411 QualType ObjectType, 1412 Expr::Classification ObjectClassification, 1413 Expr **Args, unsigned NumArgs, 1414 OverloadCandidateSet& CandidateSet, 1415 bool SuppressUserConversions = false); 1416 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1417 DeclAccessPair FoundDecl, 1418 TemplateArgumentListInfo *ExplicitTemplateArgs, 1419 Expr **Args, unsigned NumArgs, 1420 OverloadCandidateSet& CandidateSet, 1421 bool SuppressUserConversions = false); 1422 void AddConversionCandidate(CXXConversionDecl *Conversion, 1423 DeclAccessPair FoundDecl, 1424 CXXRecordDecl *ActingContext, 1425 Expr *From, QualType ToType, 1426 OverloadCandidateSet& CandidateSet); 1427 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1428 DeclAccessPair FoundDecl, 1429 CXXRecordDecl *ActingContext, 1430 Expr *From, QualType ToType, 1431 OverloadCandidateSet &CandidateSet); 1432 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1433 DeclAccessPair FoundDecl, 1434 CXXRecordDecl *ActingContext, 1435 const FunctionProtoType *Proto, 1436 Expr *Object, Expr **Args, unsigned NumArgs, 1437 OverloadCandidateSet& CandidateSet); 1438 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1439 SourceLocation OpLoc, 1440 Expr **Args, unsigned NumArgs, 1441 OverloadCandidateSet& CandidateSet, 1442 SourceRange OpRange = SourceRange()); 1443 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1444 Expr **Args, unsigned NumArgs, 1445 OverloadCandidateSet& CandidateSet, 1446 bool IsAssignmentOperator = false, 1447 unsigned NumContextualBoolArguments = 0); 1448 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1449 SourceLocation OpLoc, 1450 Expr **Args, unsigned NumArgs, 1451 OverloadCandidateSet& CandidateSet); 1452 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1453 bool Operator, 1454 Expr **Args, unsigned NumArgs, 1455 TemplateArgumentListInfo *ExplicitTemplateArgs, 1456 OverloadCandidateSet& CandidateSet, 1457 bool PartialOverloading = false, 1458 bool StdNamespaceIsAssociated = false); 1459 1460 // Emit as a 'note' the specific overload candidate 1461 void NoteOverloadCandidate(FunctionDecl *Fn); 1462 1463 // Emit as a series of 'note's all template and non-templates 1464 // identified by the expression Expr 1465 void NoteAllOverloadCandidates(Expr* E); 1466 1467 // [PossiblyAFunctionType] --> [Return] 1468 // NonFunctionType --> NonFunctionType 1469 // R (A) --> R(A) 1470 // R (*)(A) --> R (A) 1471 // R (&)(A) --> R (A) 1472 // R (S::*)(A) --> R (A) 1473 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1474 1475 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1476 bool Complain, 1477 DeclAccessPair &Found); 1478 1479 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1480 bool Complain = false, 1481 DeclAccessPair* Found = 0); 1482 1483 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1484 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1485 bool Complain = false, 1486 const SourceRange& OpRangeForComplaining = SourceRange(), 1487 QualType DestTypeForComplaining = QualType(), 1488 unsigned DiagIDForComplaining = 0); 1489 1490 1491 Expr *FixOverloadedFunctionReference(Expr *E, 1492 DeclAccessPair FoundDecl, 1493 FunctionDecl *Fn); 1494 ExprResult FixOverloadedFunctionReference(ExprResult, 1495 DeclAccessPair FoundDecl, 1496 FunctionDecl *Fn); 1497 1498 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1499 Expr **Args, unsigned NumArgs, 1500 OverloadCandidateSet &CandidateSet, 1501 bool PartialOverloading = false); 1502 1503 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1504 UnresolvedLookupExpr *ULE, 1505 SourceLocation LParenLoc, 1506 Expr **Args, unsigned NumArgs, 1507 SourceLocation RParenLoc, 1508 Expr *ExecConfig); 1509 1510 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1511 unsigned Opc, 1512 const UnresolvedSetImpl &Fns, 1513 Expr *input); 1514 1515 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1516 unsigned Opc, 1517 const UnresolvedSetImpl &Fns, 1518 Expr *LHS, Expr *RHS); 1519 1520 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1521 SourceLocation RLoc, 1522 Expr *Base,Expr *Idx); 1523 1524 ExprResult 1525 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1526 SourceLocation LParenLoc, Expr **Args, 1527 unsigned NumArgs, SourceLocation RParenLoc); 1528 ExprResult 1529 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1530 Expr **Args, unsigned NumArgs, 1531 SourceLocation RParenLoc); 1532 1533 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1534 SourceLocation OpLoc); 1535 1536 /// CheckCallReturnType - Checks that a call expression's return type is 1537 /// complete. Returns true on failure. The location passed in is the location 1538 /// that best represents the call. 1539 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1540 CallExpr *CE, FunctionDecl *FD); 1541 1542 /// Helpers for dealing with blocks and functions. 1543 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1544 bool CheckParameterNames); 1545 void CheckCXXDefaultArguments(FunctionDecl *FD); 1546 void CheckExtraCXXDefaultArguments(Declarator &D); 1547 Scope *getNonFieldDeclScope(Scope *S); 1548 1549 /// \name Name lookup 1550 /// 1551 /// These routines provide name lookup that is used during semantic 1552 /// analysis to resolve the various kinds of names (identifiers, 1553 /// overloaded operator names, constructor names, etc.) into zero or 1554 /// more declarations within a particular scope. The major entry 1555 /// points are LookupName, which performs unqualified name lookup, 1556 /// and LookupQualifiedName, which performs qualified name lookup. 1557 /// 1558 /// All name lookup is performed based on some specific criteria, 1559 /// which specify what names will be visible to name lookup and how 1560 /// far name lookup should work. These criteria are important both 1561 /// for capturing language semantics (certain lookups will ignore 1562 /// certain names, for example) and for performance, since name 1563 /// lookup is often a bottleneck in the compilation of C++. Name 1564 /// lookup criteria is specified via the LookupCriteria enumeration. 1565 /// 1566 /// The results of name lookup can vary based on the kind of name 1567 /// lookup performed, the current language, and the translation 1568 /// unit. In C, for example, name lookup will either return nothing 1569 /// (no entity found) or a single declaration. In C++, name lookup 1570 /// can additionally refer to a set of overloaded functions or 1571 /// result in an ambiguity. All of the possible results of name 1572 /// lookup are captured by the LookupResult class, which provides 1573 /// the ability to distinguish among them. 1574 //@{ 1575 1576 /// @brief Describes the kind of name lookup to perform. 1577 enum LookupNameKind { 1578 /// Ordinary name lookup, which finds ordinary names (functions, 1579 /// variables, typedefs, etc.) in C and most kinds of names 1580 /// (functions, variables, members, types, etc.) in C++. 1581 LookupOrdinaryName = 0, 1582 /// Tag name lookup, which finds the names of enums, classes, 1583 /// structs, and unions. 1584 LookupTagName, 1585 /// Label name lookup. 1586 LookupLabel, 1587 /// Member name lookup, which finds the names of 1588 /// class/struct/union members. 1589 LookupMemberName, 1590 /// Look up of an operator name (e.g., operator+) for use with 1591 /// operator overloading. This lookup is similar to ordinary name 1592 /// lookup, but will ignore any declarations that are class members. 1593 LookupOperatorName, 1594 /// Look up of a name that precedes the '::' scope resolution 1595 /// operator in C++. This lookup completely ignores operator, object, 1596 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1597 LookupNestedNameSpecifierName, 1598 /// Look up a namespace name within a C++ using directive or 1599 /// namespace alias definition, ignoring non-namespace names (C++ 1600 /// [basic.lookup.udir]p1). 1601 LookupNamespaceName, 1602 /// Look up all declarations in a scope with the given name, 1603 /// including resolved using declarations. This is appropriate 1604 /// for checking redeclarations for a using declaration. 1605 LookupUsingDeclName, 1606 /// Look up an ordinary name that is going to be redeclared as a 1607 /// name with linkage. This lookup ignores any declarations that 1608 /// are outside of the current scope unless they have linkage. See 1609 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1610 LookupRedeclarationWithLinkage, 1611 /// Look up the name of an Objective-C protocol. 1612 LookupObjCProtocolName, 1613 /// \brief Look up any declaration with any name. 1614 LookupAnyName 1615 }; 1616 1617 /// \brief Specifies whether (or how) name lookup is being performed for a 1618 /// redeclaration (vs. a reference). 1619 enum RedeclarationKind { 1620 /// \brief The lookup is a reference to this name that is not for the 1621 /// purpose of redeclaring the name. 1622 NotForRedeclaration = 0, 1623 /// \brief The lookup results will be used for redeclaration of a name, 1624 /// if an entity by that name already exists. 1625 ForRedeclaration 1626 }; 1627 1628private: 1629 bool CppLookupName(LookupResult &R, Scope *S); 1630 1631 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1632 CXXSpecialMember SM, 1633 bool ConstArg, 1634 bool VolatileArg, 1635 bool RValueThis, 1636 bool ConstThis, 1637 bool VolatileThis); 1638 1639public: 1640 /// \brief Look up a name, looking for a single declaration. Return 1641 /// null if the results were absent, ambiguous, or overloaded. 1642 /// 1643 /// It is preferable to use the elaborated form and explicitly handle 1644 /// ambiguity and overloaded. 1645 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1646 SourceLocation Loc, 1647 LookupNameKind NameKind, 1648 RedeclarationKind Redecl 1649 = NotForRedeclaration); 1650 bool LookupName(LookupResult &R, Scope *S, 1651 bool AllowBuiltinCreation = false); 1652 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1653 bool InUnqualifiedLookup = false); 1654 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1655 bool AllowBuiltinCreation = false, 1656 bool EnteringContext = false); 1657 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1658 1659 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1660 QualType T1, QualType T2, 1661 UnresolvedSetImpl &Functions); 1662 1663 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1664 SourceLocation GnuLabelLoc = SourceLocation()); 1665 1666 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1667 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1668 1669 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1670 Expr **Args, unsigned NumArgs, 1671 ADLResult &Functions, 1672 bool StdNamespaceIsAssociated = false); 1673 1674 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1675 VisibleDeclConsumer &Consumer, 1676 bool IncludeGlobalScope = true); 1677 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1678 VisibleDeclConsumer &Consumer, 1679 bool IncludeGlobalScope = true); 1680 1681 /// \brief The context in which typo-correction occurs. 1682 /// 1683 /// The typo-correction context affects which keywords (if any) are 1684 /// considered when trying to correct for typos. 1685 enum CorrectTypoContext { 1686 /// \brief An unknown context, where any keyword might be valid. 1687 CTC_Unknown, 1688 /// \brief A context where no keywords are used (e.g. we expect an actual 1689 /// name). 1690 CTC_NoKeywords, 1691 /// \brief A context where we're correcting a type name. 1692 CTC_Type, 1693 /// \brief An expression context. 1694 CTC_Expression, 1695 /// \brief A type cast, or anything else that can be followed by a '<'. 1696 CTC_CXXCasts, 1697 /// \brief A member lookup context. 1698 CTC_MemberLookup, 1699 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1700 CTC_ObjCIvarLookup, 1701 /// \brief An Objective-C property lookup context (e.g., self.prop). 1702 CTC_ObjCPropertyLookup, 1703 /// \brief The receiver of an Objective-C message send within an 1704 /// Objective-C method where 'super' is a valid keyword. 1705 CTC_ObjCMessageReceiver 1706 }; 1707 1708 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1709 DeclContext *MemberContext = 0, 1710 bool EnteringContext = false, 1711 CorrectTypoContext CTC = CTC_Unknown, 1712 const ObjCObjectPointerType *OPT = 0); 1713 1714 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1715 AssociatedNamespaceSet &AssociatedNamespaces, 1716 AssociatedClassSet &AssociatedClasses); 1717 1718 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1719 bool ConsiderLinkage, 1720 bool ExplicitInstantiationOrSpecialization); 1721 1722 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1723 //@} 1724 1725 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1726 SourceLocation IdLoc, 1727 bool TypoCorrection = false); 1728 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1729 Scope *S, bool ForRedeclaration, 1730 SourceLocation Loc); 1731 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1732 Scope *S); 1733 void AddKnownFunctionAttributes(FunctionDecl *FD); 1734 1735 // More parsing and symbol table subroutines. 1736 1737 // Decl attributes - this routine is the top level dispatcher. 1738 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1739 bool NonInheritable = true, bool Inheritable = true); 1740 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1741 bool NonInheritable = true, bool Inheritable = true); 1742 1743 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1744 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1745 bool CheckNoReturnAttr(const AttributeList &attr); 1746 1747 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1748 bool &IncompleteImpl, unsigned DiagID); 1749 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1750 ObjCMethodDecl *MethodDecl, 1751 bool IsProtocolMethodDecl); 1752 1753 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1754 ObjCInterfaceDecl *IDecl); 1755 1756 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1757 1758 /// CheckProtocolMethodDefs - This routine checks unimplemented 1759 /// methods declared in protocol, and those referenced by it. 1760 /// \param IDecl - Used for checking for methods which may have been 1761 /// inherited. 1762 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1763 ObjCProtocolDecl *PDecl, 1764 bool& IncompleteImpl, 1765 const SelectorSet &InsMap, 1766 const SelectorSet &ClsMap, 1767 ObjCContainerDecl *CDecl); 1768 1769 /// CheckImplementationIvars - This routine checks if the instance variables 1770 /// listed in the implelementation match those listed in the interface. 1771 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1772 ObjCIvarDecl **Fields, unsigned nIvars, 1773 SourceLocation Loc); 1774 1775 /// \brief Determine whether we can synthesize a provisional ivar for the 1776 /// given name. 1777 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1778 1779 /// \brief Determine whether we can synthesize a provisional ivar for the 1780 /// given property. 1781 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1782 1783 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1784 /// remains unimplemented in the class or category @implementation. 1785 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1786 ObjCContainerDecl* IDecl, 1787 bool IncompleteImpl = false); 1788 1789 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1790 /// which must be implemented by this implementation. 1791 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1792 ObjCContainerDecl *CDecl, 1793 const SelectorSet &InsMap); 1794 1795 /// DefaultSynthesizeProperties - This routine default synthesizes all 1796 /// properties which must be synthesized in class's @implementation. 1797 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1798 ObjCInterfaceDecl *IDecl); 1799 1800 /// CollectImmediateProperties - This routine collects all properties in 1801 /// the class and its conforming protocols; but not those it its super class. 1802 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1803 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1804 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1805 1806 1807 /// LookupPropertyDecl - Looks up a property in the current class and all 1808 /// its protocols. 1809 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1810 IdentifierInfo *II); 1811 1812 /// Called by ActOnProperty to handle @property declarations in 1813 //// class extensions. 1814 Decl *HandlePropertyInClassExtension(Scope *S, 1815 ObjCCategoryDecl *CDecl, 1816 SourceLocation AtLoc, 1817 FieldDeclarator &FD, 1818 Selector GetterSel, 1819 Selector SetterSel, 1820 const bool isAssign, 1821 const bool isReadWrite, 1822 const unsigned Attributes, 1823 bool *isOverridingProperty, 1824 TypeSourceInfo *T, 1825 tok::ObjCKeywordKind MethodImplKind); 1826 1827 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1828 /// handle creating the ObjcPropertyDecl for a category or @interface. 1829 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1830 ObjCContainerDecl *CDecl, 1831 SourceLocation AtLoc, 1832 FieldDeclarator &FD, 1833 Selector GetterSel, 1834 Selector SetterSel, 1835 const bool isAssign, 1836 const bool isReadWrite, 1837 const unsigned Attributes, 1838 TypeSourceInfo *T, 1839 tok::ObjCKeywordKind MethodImplKind, 1840 DeclContext *lexicalDC = 0); 1841 1842 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1843 /// warning) when atomic property has one but not the other user-declared 1844 /// setter or getter. 1845 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1846 ObjCContainerDecl* IDecl); 1847 1848 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1849 1850 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1851 /// true, or false, accordingly. 1852 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1853 const ObjCMethodDecl *PrevMethod, 1854 bool matchBasedOnSizeAndAlignment = false, 1855 bool matchBasedOnStrictEqulity = false); 1856 1857 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1858 /// or protocol against those declared in their implementations. 1859 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1860 const SelectorSet &ClsMap, 1861 SelectorSet &InsMapSeen, 1862 SelectorSet &ClsMapSeen, 1863 ObjCImplDecl* IMPDecl, 1864 ObjCContainerDecl* IDecl, 1865 bool &IncompleteImpl, 1866 bool ImmediateClass); 1867 1868private: 1869 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1870 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1871 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1872 1873 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1874 /// optionally warns if there are multiple signatures. 1875 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1876 bool receiverIdOrClass, 1877 bool warn, bool instance); 1878 1879public: 1880 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1881 /// unit are added to a global pool. This allows us to efficiently associate 1882 /// a selector with a method declaraation for purposes of typechecking 1883 /// messages sent to "id" (where the class of the object is unknown). 1884 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1885 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1886 } 1887 1888 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1889 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1890 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1891 } 1892 1893 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1894 /// there are multiple signatures. 1895 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1896 bool receiverIdOrClass=false, 1897 bool warn=true) { 1898 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1899 warn, /*instance*/true); 1900 } 1901 1902 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1903 /// there are multiple signatures. 1904 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1905 bool receiverIdOrClass=false, 1906 bool warn=true) { 1907 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1908 warn, /*instance*/false); 1909 } 1910 1911 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1912 /// implementation. 1913 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1914 1915 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1916 /// initialization. 1917 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1918 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1919 1920 //===--------------------------------------------------------------------===// 1921 // Statement Parsing Callbacks: SemaStmt.cpp. 1922public: 1923 class FullExprArg { 1924 public: 1925 FullExprArg(Sema &actions) : E(0) { } 1926 1927 // FIXME: The const_cast here is ugly. RValue references would make this 1928 // much nicer (or we could duplicate a bunch of the move semantics 1929 // emulation code from Ownership.h). 1930 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1931 1932 ExprResult release() { 1933 return move(E); 1934 } 1935 1936 Expr *get() const { return E; } 1937 1938 Expr *operator->() { 1939 return E; 1940 } 1941 1942 private: 1943 // FIXME: No need to make the entire Sema class a friend when it's just 1944 // Sema::MakeFullExpr that needs access to the constructor below. 1945 friend class Sema; 1946 1947 explicit FullExprArg(Expr *expr) : E(expr) {} 1948 1949 Expr *E; 1950 }; 1951 1952 FullExprArg MakeFullExpr(Expr *Arg) { 1953 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1954 } 1955 1956 StmtResult ActOnExprStmt(FullExprArg Expr); 1957 1958 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1959 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1960 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1961 MultiStmtArg Elts, 1962 bool isStmtExpr); 1963 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1964 SourceLocation StartLoc, 1965 SourceLocation EndLoc); 1966 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1967 StmtResult ActOnForEachLValueExpr(Expr *E); 1968 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1969 SourceLocation DotDotDotLoc, Expr *RHSVal, 1970 SourceLocation ColonLoc); 1971 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1972 1973 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1974 SourceLocation ColonLoc, 1975 Stmt *SubStmt, Scope *CurScope); 1976 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1977 SourceLocation ColonLoc, Stmt *SubStmt); 1978 1979 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1980 FullExprArg CondVal, Decl *CondVar, 1981 Stmt *ThenVal, 1982 SourceLocation ElseLoc, Stmt *ElseVal); 1983 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1984 Expr *Cond, 1985 Decl *CondVar); 1986 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1987 Stmt *Switch, Stmt *Body); 1988 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1989 FullExprArg Cond, 1990 Decl *CondVar, Stmt *Body); 1991 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1992 SourceLocation WhileLoc, 1993 SourceLocation CondLParen, Expr *Cond, 1994 SourceLocation CondRParen); 1995 1996 StmtResult ActOnForStmt(SourceLocation ForLoc, 1997 SourceLocation LParenLoc, 1998 Stmt *First, FullExprArg Second, 1999 Decl *SecondVar, 2000 FullExprArg Third, 2001 SourceLocation RParenLoc, 2002 Stmt *Body); 2003 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2004 SourceLocation LParenLoc, 2005 Stmt *First, Expr *Second, 2006 SourceLocation RParenLoc, Stmt *Body); 2007 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2008 SourceLocation LParenLoc, Stmt *LoopVar, 2009 SourceLocation ColonLoc, Expr *Collection, 2010 SourceLocation RParenLoc); 2011 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2012 SourceLocation ColonLoc, 2013 Stmt *RangeDecl, Stmt *BeginEndDecl, 2014 Expr *Cond, Expr *Inc, 2015 Stmt *LoopVarDecl, 2016 SourceLocation RParenLoc); 2017 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2018 2019 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2020 SourceLocation LabelLoc, 2021 LabelDecl *TheDecl); 2022 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2023 SourceLocation StarLoc, 2024 Expr *DestExp); 2025 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2026 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2027 2028 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2029 bool AllowFunctionParameters); 2030 2031 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2032 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2033 2034 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2035 bool IsSimple, bool IsVolatile, 2036 unsigned NumOutputs, unsigned NumInputs, 2037 IdentifierInfo **Names, 2038 MultiExprArg Constraints, 2039 MultiExprArg Exprs, 2040 Expr *AsmString, 2041 MultiExprArg Clobbers, 2042 SourceLocation RParenLoc, 2043 bool MSAsm = false); 2044 2045 2046 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2047 SourceLocation StartLoc, 2048 SourceLocation IdLoc, IdentifierInfo *Id, 2049 bool Invalid = false); 2050 2051 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2052 2053 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2054 Decl *Parm, Stmt *Body); 2055 2056 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2057 2058 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2059 MultiStmtArg Catch, Stmt *Finally); 2060 2061 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2062 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2063 Scope *CurScope); 2064 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2065 Expr *SynchExpr, 2066 Stmt *SynchBody); 2067 2068 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2069 SourceLocation StartLoc, 2070 SourceLocation IdLoc, 2071 IdentifierInfo *Id); 2072 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2073 2074 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2075 Decl *ExDecl, Stmt *HandlerBlock); 2076 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2077 MultiStmtArg Handlers); 2078 2079 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2080 SourceLocation TryLoc, 2081 Stmt *TryBlock, 2082 Stmt *Handler); 2083 2084 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2085 Expr *FilterExpr, 2086 Stmt *Block); 2087 2088 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2089 Stmt *Block); 2090 2091 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2092 2093 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2094 2095 /// \brief If it's a file scoped decl that must warn if not used, keep track 2096 /// of it. 2097 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2098 2099 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2100 /// whose result is unused, warn. 2101 void DiagnoseUnusedExprResult(const Stmt *S); 2102 void DiagnoseUnusedDecl(const NamedDecl *ND); 2103 2104 ParsingDeclState PushParsingDeclaration() { 2105 return DelayedDiagnostics.pushParsingDecl(); 2106 } 2107 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2108 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2109 } 2110 2111 typedef ProcessingContextState ParsingClassState; 2112 ParsingClassState PushParsingClass() { 2113 return DelayedDiagnostics.pushContext(); 2114 } 2115 void PopParsingClass(ParsingClassState state) { 2116 DelayedDiagnostics.popContext(state); 2117 } 2118 2119 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2120 SourceLocation Loc, 2121 const ObjCInterfaceDecl *UnknownObjCClass=0); 2122 2123 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2124 2125 //===--------------------------------------------------------------------===// 2126 // Expression Parsing Callbacks: SemaExpr.cpp. 2127 2128 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2129 const ObjCInterfaceDecl *UnknownObjCClass=0); 2130 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2131 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2132 ObjCMethodDecl *Getter, 2133 SourceLocation Loc); 2134 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2135 Expr **Args, unsigned NumArgs); 2136 2137 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2138 2139 void PopExpressionEvaluationContext(); 2140 2141 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2142 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2143 void MarkDeclarationsReferencedInExpr(Expr *E); 2144 2145 /// \brief Figure out if an expression could be turned into a call. 2146 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2147 UnresolvedSetImpl &NonTemplateOverloads); 2148 /// \brief Give notes for a set of overloads. 2149 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2150 const SourceLocation FinalNoteLoc); 2151 2152 /// \brief Conditionally issue a diagnostic based on the current 2153 /// evaluation context. 2154 /// 2155 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2156 /// the function body is parsed, and then do a basic reachability analysis to 2157 /// determine if the statement is reachable. If it is unreachable, the 2158 /// diagnostic will not be emitted. 2159 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2160 const PartialDiagnostic &PD); 2161 2162 // Primary Expressions. 2163 SourceRange getExprRange(Expr *E) const; 2164 2165 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2166 IdentifierInfo *II, 2167 SourceLocation NameLoc); 2168 2169 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2170 bool HasTrailingLParen, bool IsAddressOfOperand); 2171 2172 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2173 CorrectTypoContext CTC = CTC_Unknown); 2174 2175 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2176 bool AllowBuiltinCreation=false); 2177 2178 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2179 const DeclarationNameInfo &NameInfo, 2180 bool isAddressOfOperand, 2181 const TemplateArgumentListInfo *TemplateArgs); 2182 2183 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2184 ExprValueKind VK, 2185 SourceLocation Loc, 2186 const CXXScopeSpec *SS = 0); 2187 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2188 ExprValueKind VK, 2189 const DeclarationNameInfo &NameInfo, 2190 const CXXScopeSpec *SS = 0); 2191 ExprResult 2192 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2193 SourceLocation nameLoc, 2194 IndirectFieldDecl *indirectField, 2195 Expr *baseObjectExpr = 0, 2196 SourceLocation opLoc = SourceLocation()); 2197 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2198 LookupResult &R, 2199 const TemplateArgumentListInfo *TemplateArgs); 2200 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2201 LookupResult &R, 2202 const TemplateArgumentListInfo *TemplateArgs, 2203 bool IsDefiniteInstance); 2204 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2205 const LookupResult &R, 2206 bool HasTrailingLParen); 2207 2208 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2209 const DeclarationNameInfo &NameInfo); 2210 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2211 const DeclarationNameInfo &NameInfo, 2212 const TemplateArgumentListInfo *TemplateArgs); 2213 2214 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2215 LookupResult &R, 2216 bool ADL); 2217 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2218 const DeclarationNameInfo &NameInfo, 2219 NamedDecl *D); 2220 2221 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2222 ExprResult ActOnNumericConstant(const Token &); 2223 ExprResult ActOnCharacterConstant(const Token &); 2224 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2225 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2226 SourceLocation R, 2227 MultiExprArg Val, 2228 ParsedType TypeOfCast = ParsedType()); 2229 2230 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2231 /// fragments (e.g. "foo" "bar" L"baz"). 2232 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2233 2234 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2235 SourceLocation DefaultLoc, 2236 SourceLocation RParenLoc, 2237 Expr *ControllingExpr, 2238 MultiTypeArg Types, 2239 MultiExprArg Exprs); 2240 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2241 SourceLocation DefaultLoc, 2242 SourceLocation RParenLoc, 2243 Expr *ControllingExpr, 2244 TypeSourceInfo **Types, 2245 Expr **Exprs, 2246 unsigned NumAssocs); 2247 2248 // Binary/Unary Operators. 'Tok' is the token for the operator. 2249 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2250 Expr *InputArg); 2251 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2252 UnaryOperatorKind Opc, Expr *input); 2253 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2254 tok::TokenKind Op, Expr *Input); 2255 2256 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2257 SourceLocation OpLoc, 2258 UnaryExprOrTypeTrait ExprKind, 2259 SourceRange R); 2260 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2261 UnaryExprOrTypeTrait ExprKind); 2262 ExprResult 2263 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2264 UnaryExprOrTypeTrait ExprKind, 2265 bool isType, void *TyOrEx, 2266 const SourceRange &ArgRange); 2267 2268 ExprResult CheckPlaceholderExpr(Expr *E); 2269 bool CheckVecStepExpr(Expr *E); 2270 2271 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2272 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2273 SourceRange R, 2274 UnaryExprOrTypeTrait ExprKind); 2275 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2276 SourceLocation OpLoc, 2277 IdentifierInfo &Name, 2278 SourceLocation NameLoc, 2279 SourceLocation RParenLoc); 2280 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2281 tok::TokenKind Kind, Expr *Input); 2282 2283 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2284 Expr *Idx, SourceLocation RLoc); 2285 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2286 Expr *Idx, SourceLocation RLoc); 2287 2288 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2289 SourceLocation OpLoc, bool IsArrow, 2290 CXXScopeSpec &SS, 2291 NamedDecl *FirstQualifierInScope, 2292 const DeclarationNameInfo &NameInfo, 2293 const TemplateArgumentListInfo *TemplateArgs); 2294 2295 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2296 SourceLocation OpLoc, bool IsArrow, 2297 const CXXScopeSpec &SS, 2298 NamedDecl *FirstQualifierInScope, 2299 LookupResult &R, 2300 const TemplateArgumentListInfo *TemplateArgs, 2301 bool SuppressQualifierCheck = false); 2302 2303 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2304 bool &IsArrow, SourceLocation OpLoc, 2305 CXXScopeSpec &SS, 2306 Decl *ObjCImpDecl, 2307 bool HasTemplateArgs); 2308 2309 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2310 const CXXScopeSpec &SS, 2311 const LookupResult &R); 2312 2313 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2314 bool IsArrow, SourceLocation OpLoc, 2315 const CXXScopeSpec &SS, 2316 NamedDecl *FirstQualifierInScope, 2317 const DeclarationNameInfo &NameInfo, 2318 const TemplateArgumentListInfo *TemplateArgs); 2319 2320 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2321 SourceLocation OpLoc, 2322 tok::TokenKind OpKind, 2323 CXXScopeSpec &SS, 2324 UnqualifiedId &Member, 2325 Decl *ObjCImpDecl, 2326 bool HasTrailingLParen); 2327 2328 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2329 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2330 FunctionDecl *FDecl, 2331 const FunctionProtoType *Proto, 2332 Expr **Args, unsigned NumArgs, 2333 SourceLocation RParenLoc); 2334 2335 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2336 /// This provides the location of the left/right parens and a list of comma 2337 /// locations. 2338 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2339 MultiExprArg Args, SourceLocation RParenLoc, 2340 Expr *ExecConfig = 0); 2341 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2342 SourceLocation LParenLoc, 2343 Expr **Args, unsigned NumArgs, 2344 SourceLocation RParenLoc, 2345 Expr *ExecConfig = 0); 2346 2347 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2348 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2349 2350 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2351 ParsedType Ty, SourceLocation RParenLoc, 2352 Expr *Op); 2353 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2354 TypeSourceInfo *Ty, 2355 SourceLocation RParenLoc, 2356 Expr *Op); 2357 2358 bool TypeIsVectorType(ParsedType Ty) { 2359 return GetTypeFromParser(Ty)->isVectorType(); 2360 } 2361 2362 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2363 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2364 SourceLocation RParenLoc, Expr *E, 2365 TypeSourceInfo *TInfo); 2366 2367 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2368 ParsedType Ty, 2369 SourceLocation RParenLoc, 2370 Expr *Op); 2371 2372 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2373 TypeSourceInfo *TInfo, 2374 SourceLocation RParenLoc, 2375 Expr *InitExpr); 2376 2377 ExprResult ActOnInitList(SourceLocation LParenLoc, 2378 MultiExprArg InitList, 2379 SourceLocation RParenLoc); 2380 2381 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2382 SourceLocation Loc, 2383 bool GNUSyntax, 2384 ExprResult Init); 2385 2386 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2387 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2388 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2389 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2390 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2391 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2392 2393 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2394 /// in the case of a the GNU conditional expr extension. 2395 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2396 SourceLocation ColonLoc, 2397 Expr *Cond, Expr *LHS, Expr *RHS); 2398 2399 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2400 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2401 LabelDecl *LD); 2402 2403 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2404 SourceLocation RPLoc); // "({..})" 2405 2406 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2407 struct OffsetOfComponent { 2408 SourceLocation LocStart, LocEnd; 2409 bool isBrackets; // true if [expr], false if .ident 2410 union { 2411 IdentifierInfo *IdentInfo; 2412 ExprTy *E; 2413 } U; 2414 }; 2415 2416 /// __builtin_offsetof(type, a.b[123][456].c) 2417 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2418 TypeSourceInfo *TInfo, 2419 OffsetOfComponent *CompPtr, 2420 unsigned NumComponents, 2421 SourceLocation RParenLoc); 2422 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2423 SourceLocation BuiltinLoc, 2424 SourceLocation TypeLoc, 2425 ParsedType Arg1, 2426 OffsetOfComponent *CompPtr, 2427 unsigned NumComponents, 2428 SourceLocation RParenLoc); 2429 2430 // __builtin_choose_expr(constExpr, expr1, expr2) 2431 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2432 Expr *cond, Expr *expr1, 2433 Expr *expr2, SourceLocation RPLoc); 2434 2435 // __builtin_va_arg(expr, type) 2436 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2437 Expr *expr, ParsedType type, 2438 SourceLocation RPLoc); 2439 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2440 Expr *expr, TypeSourceInfo *TInfo, 2441 SourceLocation RPLoc); 2442 2443 // __null 2444 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2445 2446 bool CheckCaseExpression(Expr *expr); 2447 2448 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2449 2450 //===------------------------- "Block" Extension ------------------------===// 2451 2452 /// ActOnBlockStart - This callback is invoked when a block literal is 2453 /// started. 2454 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2455 2456 /// ActOnBlockArguments - This callback allows processing of block arguments. 2457 /// If there are no arguments, this is still invoked. 2458 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2459 2460 /// ActOnBlockError - If there is an error parsing a block, this callback 2461 /// is invoked to pop the information about the block from the action impl. 2462 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2463 2464 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2465 /// literal was successfully completed. ^(int x){...} 2466 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2467 Stmt *Body, Scope *CurScope); 2468 2469 //===---------------------------- OpenCL Features -----------------------===// 2470 2471 /// __builtin_astype(...) 2472 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2473 SourceLocation BuiltinLoc, 2474 SourceLocation RParenLoc); 2475 2476 //===---------------------------- C++ Features --------------------------===// 2477 2478 // Act on C++ namespaces 2479 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2480 SourceLocation NamespaceLoc, 2481 SourceLocation IdentLoc, 2482 IdentifierInfo *Ident, 2483 SourceLocation LBrace, 2484 AttributeList *AttrList); 2485 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2486 2487 NamespaceDecl *getStdNamespace() const; 2488 NamespaceDecl *getOrCreateStdNamespace(); 2489 2490 CXXRecordDecl *getStdBadAlloc() const; 2491 2492 Decl *ActOnUsingDirective(Scope *CurScope, 2493 SourceLocation UsingLoc, 2494 SourceLocation NamespcLoc, 2495 CXXScopeSpec &SS, 2496 SourceLocation IdentLoc, 2497 IdentifierInfo *NamespcName, 2498 AttributeList *AttrList); 2499 2500 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2501 2502 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2503 SourceLocation NamespaceLoc, 2504 SourceLocation AliasLoc, 2505 IdentifierInfo *Alias, 2506 CXXScopeSpec &SS, 2507 SourceLocation IdentLoc, 2508 IdentifierInfo *Ident); 2509 2510 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2511 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2512 const LookupResult &PreviousDecls); 2513 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2514 NamedDecl *Target); 2515 2516 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2517 bool isTypeName, 2518 const CXXScopeSpec &SS, 2519 SourceLocation NameLoc, 2520 const LookupResult &Previous); 2521 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2522 const CXXScopeSpec &SS, 2523 SourceLocation NameLoc); 2524 2525 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2526 SourceLocation UsingLoc, 2527 CXXScopeSpec &SS, 2528 const DeclarationNameInfo &NameInfo, 2529 AttributeList *AttrList, 2530 bool IsInstantiation, 2531 bool IsTypeName, 2532 SourceLocation TypenameLoc); 2533 2534 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2535 2536 Decl *ActOnUsingDeclaration(Scope *CurScope, 2537 AccessSpecifier AS, 2538 bool HasUsingKeyword, 2539 SourceLocation UsingLoc, 2540 CXXScopeSpec &SS, 2541 UnqualifiedId &Name, 2542 AttributeList *AttrList, 2543 bool IsTypeName, 2544 SourceLocation TypenameLoc); 2545 Decl *ActOnAliasDeclaration(Scope *CurScope, 2546 AccessSpecifier AS, 2547 MultiTemplateParamsArg TemplateParams, 2548 SourceLocation UsingLoc, 2549 UnqualifiedId &Name, 2550 TypeResult Type); 2551 2552 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2553 /// ActOnDeclarator, when a C++ direct initializer is present. 2554 /// e.g: "int x(1);" 2555 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2556 SourceLocation LParenLoc, 2557 MultiExprArg Exprs, 2558 SourceLocation RParenLoc, 2559 bool TypeMayContainAuto); 2560 2561 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2562 /// and sets it as the initializer for the the passed in VarDecl. 2563 bool InitializeVarWithConstructor(VarDecl *VD, 2564 CXXConstructorDecl *Constructor, 2565 MultiExprArg Exprs); 2566 2567 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2568 /// including handling of its default argument expressions. 2569 /// 2570 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2571 ExprResult 2572 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2573 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2574 bool RequiresZeroInit, unsigned ConstructKind, 2575 SourceRange ParenRange); 2576 2577 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2578 // the constructor can be elidable? 2579 ExprResult 2580 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2581 CXXConstructorDecl *Constructor, bool Elidable, 2582 MultiExprArg Exprs, bool RequiresZeroInit, 2583 unsigned ConstructKind, 2584 SourceRange ParenRange); 2585 2586 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2587 /// the default expr if needed. 2588 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2589 FunctionDecl *FD, 2590 ParmVarDecl *Param); 2591 2592 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2593 /// constructed variable. 2594 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2595 2596 /// \brief Helper class that collects exception specifications for 2597 /// implicitly-declared special member functions. 2598 class ImplicitExceptionSpecification { 2599 // Pointer to allow copying 2600 ASTContext *Context; 2601 // We order exception specifications thus: 2602 // noexcept is the most restrictive, but is only used in C++0x. 2603 // throw() comes next. 2604 // Then a throw(collected exceptions) 2605 // Finally no specification. 2606 // throw(...) is used instead if any called function uses it. 2607 ExceptionSpecificationType ComputedEST; 2608 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2609 llvm::SmallVector<QualType, 4> Exceptions; 2610 2611 void ClearExceptions() { 2612 ExceptionsSeen.clear(); 2613 Exceptions.clear(); 2614 } 2615 2616 public: 2617 explicit ImplicitExceptionSpecification(ASTContext &Context) 2618 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2619 if (!Context.getLangOptions().CPlusPlus0x) 2620 ComputedEST = EST_DynamicNone; 2621 } 2622 2623 /// \brief Get the computed exception specification type. 2624 ExceptionSpecificationType getExceptionSpecType() const { 2625 assert(ComputedEST != EST_ComputedNoexcept && 2626 "noexcept(expr) should not be a possible result"); 2627 return ComputedEST; 2628 } 2629 2630 /// \brief The number of exceptions in the exception specification. 2631 unsigned size() const { return Exceptions.size(); } 2632 2633 /// \brief The set of exceptions in the exception specification. 2634 const QualType *data() const { return Exceptions.data(); } 2635 2636 /// \brief Integrate another called method into the collected data. 2637 void CalledDecl(CXXMethodDecl *Method); 2638 2639 FunctionProtoType::ExtProtoInfo getEPI() const { 2640 FunctionProtoType::ExtProtoInfo EPI; 2641 EPI.ExceptionSpecType = getExceptionSpecType(); 2642 EPI.NumExceptions = size(); 2643 EPI.Exceptions = data(); 2644 return EPI; 2645 } 2646 }; 2647 2648 /// \brief Determine what sort of exception specification a defaulted 2649 /// copy constructor of a class will have. 2650 ImplicitExceptionSpecification 2651 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2652 2653 /// \brief Determine what sort of exception specification a defaulted 2654 /// default constructor of a class will have, and whether the parameter 2655 /// will be const. 2656 std::pair<ImplicitExceptionSpecification, bool> 2657 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2658 2659 /// \brief Determine what sort of exception specification a defautled 2660 /// copy assignment operator of a class will have, and whether the 2661 /// parameter will be const. 2662 std::pair<ImplicitExceptionSpecification, bool> 2663 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2664 2665 /// \brief Determine what sort of exception specification a defaulted 2666 /// destructor of a class will have. 2667 ImplicitExceptionSpecification 2668 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2669 2670 /// \brief Determine if a defaulted default constructor ought to be 2671 /// deleted. 2672 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2673 2674 /// \brief Determine if a defaulted copy constructor ought to be 2675 /// deleted. 2676 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2677 2678 /// \brief Determine if a defaulted copy assignment operator ought to be 2679 /// deleted. 2680 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2681 2682 /// \brief Determine if a defaulted destructor ought to be deleted. 2683 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2684 2685 /// \brief Declare the implicit default constructor for the given class. 2686 /// 2687 /// \param ClassDecl The class declaration into which the implicit 2688 /// default constructor will be added. 2689 /// 2690 /// \returns The implicitly-declared default constructor. 2691 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2692 CXXRecordDecl *ClassDecl); 2693 2694 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2695 /// defining this constructor as the default constructor. 2696 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2697 CXXConstructorDecl *Constructor); 2698 2699 /// \brief Declare the implicit destructor for the given class. 2700 /// 2701 /// \param ClassDecl The class declaration into which the implicit 2702 /// destructor will be added. 2703 /// 2704 /// \returns The implicitly-declared destructor. 2705 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2706 2707 /// DefineImplicitDestructor - Checks for feasibility of 2708 /// defining this destructor as the default destructor. 2709 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2710 CXXDestructorDecl *Destructor); 2711 2712 /// \brief Build an exception spec for destructors that don't have one. 2713 /// 2714 /// C++11 says that user-defined destructors with no exception spec get one 2715 /// that looks as if the destructor was implicitly declared. 2716 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2717 CXXDestructorDecl *Destructor); 2718 2719 /// \brief Declare all inherited constructors for the given class. 2720 /// 2721 /// \param ClassDecl The class declaration into which the inherited 2722 /// constructors will be added. 2723 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2724 2725 /// \brief Declare the implicit copy constructor for the given class. 2726 /// 2727 /// \param S The scope of the class, which may be NULL if this is a 2728 /// template instantiation. 2729 /// 2730 /// \param ClassDecl The class declaration into which the implicit 2731 /// copy constructor will be added. 2732 /// 2733 /// \returns The implicitly-declared copy constructor. 2734 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2735 2736 /// DefineImplicitCopyConstructor - Checks for feasibility of 2737 /// defining this constructor as the copy constructor. 2738 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2739 CXXConstructorDecl *Constructor); 2740 2741 /// \brief Declare the implicit copy assignment operator for the given class. 2742 /// 2743 /// \param S The scope of the class, which may be NULL if this is a 2744 /// template instantiation. 2745 /// 2746 /// \param ClassDecl The class declaration into which the implicit 2747 /// copy-assignment operator will be added. 2748 /// 2749 /// \returns The implicitly-declared copy assignment operator. 2750 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2751 2752 /// \brief Defined an implicitly-declared copy assignment operator. 2753 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2754 CXXMethodDecl *MethodDecl); 2755 2756 /// \brief Force the declaration of any implicitly-declared members of this 2757 /// class. 2758 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2759 2760 /// MaybeBindToTemporary - If the passed in expression has a record type with 2761 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2762 /// it simply returns the passed in expression. 2763 ExprResult MaybeBindToTemporary(Expr *E); 2764 2765 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2766 MultiExprArg ArgsPtr, 2767 SourceLocation Loc, 2768 ASTOwningVector<Expr*> &ConvertedArgs); 2769 2770 ParsedType getDestructorName(SourceLocation TildeLoc, 2771 IdentifierInfo &II, SourceLocation NameLoc, 2772 Scope *S, CXXScopeSpec &SS, 2773 ParsedType ObjectType, 2774 bool EnteringContext); 2775 2776 // Checks that reinterpret casts don't have undefined behavior. 2777 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2778 bool IsDereference, SourceRange Range); 2779 2780 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2781 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2782 tok::TokenKind Kind, 2783 SourceLocation LAngleBracketLoc, 2784 ParsedType Ty, 2785 SourceLocation RAngleBracketLoc, 2786 SourceLocation LParenLoc, 2787 Expr *E, 2788 SourceLocation RParenLoc); 2789 2790 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2791 tok::TokenKind Kind, 2792 TypeSourceInfo *Ty, 2793 Expr *E, 2794 SourceRange AngleBrackets, 2795 SourceRange Parens); 2796 2797 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2798 SourceLocation TypeidLoc, 2799 TypeSourceInfo *Operand, 2800 SourceLocation RParenLoc); 2801 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2802 SourceLocation TypeidLoc, 2803 Expr *Operand, 2804 SourceLocation RParenLoc); 2805 2806 /// ActOnCXXTypeid - Parse typeid( something ). 2807 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2808 SourceLocation LParenLoc, bool isType, 2809 void *TyOrExpr, 2810 SourceLocation RParenLoc); 2811 2812 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2813 SourceLocation TypeidLoc, 2814 TypeSourceInfo *Operand, 2815 SourceLocation RParenLoc); 2816 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2817 SourceLocation TypeidLoc, 2818 Expr *Operand, 2819 SourceLocation RParenLoc); 2820 2821 /// ActOnCXXUuidof - Parse __uuidof( something ). 2822 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2823 SourceLocation LParenLoc, bool isType, 2824 void *TyOrExpr, 2825 SourceLocation RParenLoc); 2826 2827 2828 //// ActOnCXXThis - Parse 'this' pointer. 2829 ExprResult ActOnCXXThis(SourceLocation loc); 2830 2831 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2832 /// pointer to an instance method whose 'this' pointer is 2833 /// capturable, or null if this is not possible. 2834 CXXMethodDecl *tryCaptureCXXThis(); 2835 2836 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2837 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2838 2839 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2840 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2841 2842 //// ActOnCXXThrow - Parse throw expressions. 2843 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2844 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2845 2846 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2847 /// Can be interpreted either as function-style casting ("int(x)") 2848 /// or class type construction ("ClassType(x,y,z)") 2849 /// or creation of a value-initialized type ("int()"). 2850 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2851 SourceLocation LParenLoc, 2852 MultiExprArg Exprs, 2853 SourceLocation RParenLoc); 2854 2855 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2856 SourceLocation LParenLoc, 2857 MultiExprArg Exprs, 2858 SourceLocation RParenLoc); 2859 2860 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2861 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2862 SourceLocation PlacementLParen, 2863 MultiExprArg PlacementArgs, 2864 SourceLocation PlacementRParen, 2865 SourceRange TypeIdParens, Declarator &D, 2866 SourceLocation ConstructorLParen, 2867 MultiExprArg ConstructorArgs, 2868 SourceLocation ConstructorRParen); 2869 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2870 SourceLocation PlacementLParen, 2871 MultiExprArg PlacementArgs, 2872 SourceLocation PlacementRParen, 2873 SourceRange TypeIdParens, 2874 QualType AllocType, 2875 TypeSourceInfo *AllocTypeInfo, 2876 Expr *ArraySize, 2877 SourceLocation ConstructorLParen, 2878 MultiExprArg ConstructorArgs, 2879 SourceLocation ConstructorRParen, 2880 bool TypeMayContainAuto = true); 2881 2882 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2883 SourceRange R); 2884 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2885 bool UseGlobal, QualType AllocType, bool IsArray, 2886 Expr **PlaceArgs, unsigned NumPlaceArgs, 2887 FunctionDecl *&OperatorNew, 2888 FunctionDecl *&OperatorDelete); 2889 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2890 DeclarationName Name, Expr** Args, 2891 unsigned NumArgs, DeclContext *Ctx, 2892 bool AllowMissing, FunctionDecl *&Operator, 2893 bool Diagnose = true); 2894 void DeclareGlobalNewDelete(); 2895 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2896 QualType Argument, 2897 bool addMallocAttr = false); 2898 2899 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2900 DeclarationName Name, FunctionDecl* &Operator, 2901 bool Diagnose = true); 2902 2903 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2904 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2905 bool UseGlobal, bool ArrayForm, 2906 Expr *Operand); 2907 2908 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2909 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2910 SourceLocation StmtLoc, 2911 bool ConvertToBoolean); 2912 2913 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2914 Expr *Operand, SourceLocation RParen); 2915 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2916 SourceLocation RParen); 2917 2918 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2919 /// pseudo-functions. 2920 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2921 SourceLocation KWLoc, 2922 ParsedType Ty, 2923 SourceLocation RParen); 2924 2925 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2926 SourceLocation KWLoc, 2927 TypeSourceInfo *T, 2928 SourceLocation RParen); 2929 2930 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2931 /// pseudo-functions. 2932 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2933 SourceLocation KWLoc, 2934 ParsedType LhsTy, 2935 ParsedType RhsTy, 2936 SourceLocation RParen); 2937 2938 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2939 SourceLocation KWLoc, 2940 TypeSourceInfo *LhsT, 2941 TypeSourceInfo *RhsT, 2942 SourceLocation RParen); 2943 2944 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 2945 /// pseudo-functions. 2946 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 2947 SourceLocation KWLoc, 2948 ParsedType LhsTy, 2949 Expr *DimExpr, 2950 SourceLocation RParen); 2951 2952 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 2953 SourceLocation KWLoc, 2954 TypeSourceInfo *TSInfo, 2955 Expr *DimExpr, 2956 SourceLocation RParen); 2957 2958 /// ActOnExpressionTrait - Parsed one of the unary type trait support 2959 /// pseudo-functions. 2960 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 2961 SourceLocation KWLoc, 2962 Expr *Queried, 2963 SourceLocation RParen); 2964 2965 ExprResult BuildExpressionTrait(ExpressionTrait OET, 2966 SourceLocation KWLoc, 2967 Expr *Queried, 2968 SourceLocation RParen); 2969 2970 ExprResult ActOnStartCXXMemberReference(Scope *S, 2971 Expr *Base, 2972 SourceLocation OpLoc, 2973 tok::TokenKind OpKind, 2974 ParsedType &ObjectType, 2975 bool &MayBePseudoDestructor); 2976 2977 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2978 2979 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2980 SourceLocation OpLoc, 2981 tok::TokenKind OpKind, 2982 const CXXScopeSpec &SS, 2983 TypeSourceInfo *ScopeType, 2984 SourceLocation CCLoc, 2985 SourceLocation TildeLoc, 2986 PseudoDestructorTypeStorage DestroyedType, 2987 bool HasTrailingLParen); 2988 2989 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2990 SourceLocation OpLoc, 2991 tok::TokenKind OpKind, 2992 CXXScopeSpec &SS, 2993 UnqualifiedId &FirstTypeName, 2994 SourceLocation CCLoc, 2995 SourceLocation TildeLoc, 2996 UnqualifiedId &SecondTypeName, 2997 bool HasTrailingLParen); 2998 2999 /// MaybeCreateExprWithCleanups - If the current full-expression 3000 /// requires any cleanups, surround it with a ExprWithCleanups node. 3001 /// Otherwise, just returns the passed-in expression. 3002 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3003 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3004 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3005 3006 ExprResult ActOnFinishFullExpr(Expr *Expr); 3007 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3008 3009 // Marks SS invalid if it represents an incomplete type. 3010 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3011 3012 DeclContext *computeDeclContext(QualType T); 3013 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3014 bool EnteringContext = false); 3015 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3016 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3017 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3018 3019 /// \brief The parser has parsed a global nested-name-specifier '::'. 3020 /// 3021 /// \param S The scope in which this nested-name-specifier occurs. 3022 /// 3023 /// \param CCLoc The location of the '::'. 3024 /// 3025 /// \param SS The nested-name-specifier, which will be updated in-place 3026 /// to reflect the parsed nested-name-specifier. 3027 /// 3028 /// \returns true if an error occurred, false otherwise. 3029 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3030 CXXScopeSpec &SS); 3031 3032 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3033 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3034 3035 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3036 SourceLocation IdLoc, 3037 IdentifierInfo &II, 3038 ParsedType ObjectType); 3039 3040 bool BuildCXXNestedNameSpecifier(Scope *S, 3041 IdentifierInfo &Identifier, 3042 SourceLocation IdentifierLoc, 3043 SourceLocation CCLoc, 3044 QualType ObjectType, 3045 bool EnteringContext, 3046 CXXScopeSpec &SS, 3047 NamedDecl *ScopeLookupResult, 3048 bool ErrorRecoveryLookup); 3049 3050 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3051 /// 3052 /// \param S The scope in which this nested-name-specifier occurs. 3053 /// 3054 /// \param Identifier The identifier preceding the '::'. 3055 /// 3056 /// \param IdentifierLoc The location of the identifier. 3057 /// 3058 /// \param CCLoc The location of the '::'. 3059 /// 3060 /// \param ObjectType The type of the object, if we're parsing 3061 /// nested-name-specifier in a member access expression. 3062 /// 3063 /// \param EnteringContext Whether we're entering the context nominated by 3064 /// this nested-name-specifier. 3065 /// 3066 /// \param SS The nested-name-specifier, which is both an input 3067 /// parameter (the nested-name-specifier before this type) and an 3068 /// output parameter (containing the full nested-name-specifier, 3069 /// including this new type). 3070 /// 3071 /// \returns true if an error occurred, false otherwise. 3072 bool ActOnCXXNestedNameSpecifier(Scope *S, 3073 IdentifierInfo &Identifier, 3074 SourceLocation IdentifierLoc, 3075 SourceLocation CCLoc, 3076 ParsedType ObjectType, 3077 bool EnteringContext, 3078 CXXScopeSpec &SS); 3079 3080 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3081 IdentifierInfo &Identifier, 3082 SourceLocation IdentifierLoc, 3083 SourceLocation ColonLoc, 3084 ParsedType ObjectType, 3085 bool EnteringContext); 3086 3087 /// \brief The parser has parsed a nested-name-specifier 3088 /// 'template[opt] template-name < template-args >::'. 3089 /// 3090 /// \param S The scope in which this nested-name-specifier occurs. 3091 /// 3092 /// \param TemplateLoc The location of the 'template' keyword, if any. 3093 /// 3094 /// \param SS The nested-name-specifier, which is both an input 3095 /// parameter (the nested-name-specifier before this type) and an 3096 /// output parameter (containing the full nested-name-specifier, 3097 /// including this new type). 3098 /// 3099 /// \param TemplateLoc the location of the 'template' keyword, if any. 3100 /// \param TemplateName The template name. 3101 /// \param TemplateNameLoc The location of the template name. 3102 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3103 /// \param TemplateArgs The template arguments. 3104 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3105 /// \param CCLoc The location of the '::'. 3106 3107 /// \param EnteringContext Whether we're entering the context of the 3108 /// nested-name-specifier. 3109 /// 3110 /// 3111 /// \returns true if an error occurred, false otherwise. 3112 bool ActOnCXXNestedNameSpecifier(Scope *S, 3113 SourceLocation TemplateLoc, 3114 CXXScopeSpec &SS, 3115 TemplateTy Template, 3116 SourceLocation TemplateNameLoc, 3117 SourceLocation LAngleLoc, 3118 ASTTemplateArgsPtr TemplateArgs, 3119 SourceLocation RAngleLoc, 3120 SourceLocation CCLoc, 3121 bool EnteringContext); 3122 3123 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3124 /// that the parser can use later to reconstruct the given 3125 /// nested-name-specifier. 3126 /// 3127 /// \param SS A nested-name-specifier. 3128 /// 3129 /// \returns A pointer containing all of the information in the 3130 /// nested-name-specifier \p SS. 3131 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3132 3133 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3134 /// the nested-name-specifier structure. 3135 /// 3136 /// \param Annotation The annotation pointer, produced by 3137 /// \c SaveNestedNameSpecifierAnnotation(). 3138 /// 3139 /// \param AnnotationRange The source range corresponding to the annotation. 3140 /// 3141 /// \param SS The nested-name-specifier that will be updated with the contents 3142 /// of the annotation pointer. 3143 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3144 SourceRange AnnotationRange, 3145 CXXScopeSpec &SS); 3146 3147 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3148 3149 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3150 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3151 /// After this method is called, according to [C++ 3.4.3p3], names should be 3152 /// looked up in the declarator-id's scope, until the declarator is parsed and 3153 /// ActOnCXXExitDeclaratorScope is called. 3154 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3155 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3156 3157 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3158 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3159 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3160 /// Used to indicate that names should revert to being looked up in the 3161 /// defining scope. 3162 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3163 3164 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3165 /// initializer for the declaration 'Dcl'. 3166 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3167 /// static data member of class X, names should be looked up in the scope of 3168 /// class X. 3169 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3170 3171 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3172 /// initializer for the declaration 'Dcl'. 3173 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3174 3175 // ParseObjCStringLiteral - Parse Objective-C string literals. 3176 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3177 Expr **Strings, 3178 unsigned NumStrings); 3179 3180 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3181 TypeSourceInfo *EncodedTypeInfo, 3182 SourceLocation RParenLoc); 3183 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3184 CXXMethodDecl *Method); 3185 3186 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3187 SourceLocation EncodeLoc, 3188 SourceLocation LParenLoc, 3189 ParsedType Ty, 3190 SourceLocation RParenLoc); 3191 3192 // ParseObjCSelectorExpression - Build selector expression for @selector 3193 ExprResult ParseObjCSelectorExpression(Selector Sel, 3194 SourceLocation AtLoc, 3195 SourceLocation SelLoc, 3196 SourceLocation LParenLoc, 3197 SourceLocation RParenLoc); 3198 3199 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3200 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3201 SourceLocation AtLoc, 3202 SourceLocation ProtoLoc, 3203 SourceLocation LParenLoc, 3204 SourceLocation RParenLoc); 3205 3206 //===--------------------------------------------------------------------===// 3207 // C++ Declarations 3208 // 3209 Decl *ActOnStartLinkageSpecification(Scope *S, 3210 SourceLocation ExternLoc, 3211 SourceLocation LangLoc, 3212 llvm::StringRef Lang, 3213 SourceLocation LBraceLoc); 3214 Decl *ActOnFinishLinkageSpecification(Scope *S, 3215 Decl *LinkageSpec, 3216 SourceLocation RBraceLoc); 3217 3218 3219 //===--------------------------------------------------------------------===// 3220 // C++ Classes 3221 // 3222 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3223 const CXXScopeSpec *SS = 0); 3224 3225 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3226 SourceLocation ASLoc, 3227 SourceLocation ColonLoc); 3228 3229 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3230 Declarator &D, 3231 MultiTemplateParamsArg TemplateParameterLists, 3232 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3233 Expr *Init, bool IsDefinition); 3234 3235 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3236 Scope *S, 3237 CXXScopeSpec &SS, 3238 IdentifierInfo *MemberOrBase, 3239 ParsedType TemplateTypeTy, 3240 SourceLocation IdLoc, 3241 SourceLocation LParenLoc, 3242 Expr **Args, unsigned NumArgs, 3243 SourceLocation RParenLoc, 3244 SourceLocation EllipsisLoc); 3245 3246 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3247 unsigned NumArgs, SourceLocation IdLoc, 3248 SourceLocation LParenLoc, 3249 SourceLocation RParenLoc); 3250 3251 MemInitResult BuildBaseInitializer(QualType BaseType, 3252 TypeSourceInfo *BaseTInfo, 3253 Expr **Args, unsigned NumArgs, 3254 SourceLocation LParenLoc, 3255 SourceLocation RParenLoc, 3256 CXXRecordDecl *ClassDecl, 3257 SourceLocation EllipsisLoc); 3258 3259 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3260 Expr **Args, unsigned NumArgs, 3261 SourceLocation BaseLoc, 3262 SourceLocation RParenLoc, 3263 SourceLocation LParenLoc, 3264 CXXRecordDecl *ClassDecl); 3265 3266 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3267 CXXCtorInitializer *Initializer); 3268 3269 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3270 CXXCtorInitializer **Initializers, 3271 unsigned NumInitializers, bool AnyErrors); 3272 3273 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3274 3275 3276 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3277 /// mark all the non-trivial destructors of its members and bases as 3278 /// referenced. 3279 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3280 CXXRecordDecl *Record); 3281 3282 /// \brief The list of classes whose vtables have been used within 3283 /// this translation unit, and the source locations at which the 3284 /// first use occurred. 3285 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3286 3287 /// \brief The list of vtables that are required but have not yet been 3288 /// materialized. 3289 llvm::SmallVector<VTableUse, 16> VTableUses; 3290 3291 /// \brief The set of classes whose vtables have been used within 3292 /// this translation unit, and a bit that will be true if the vtable is 3293 /// required to be emitted (otherwise, it should be emitted only if needed 3294 /// by code generation). 3295 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3296 3297 /// \brief A list of all of the dynamic classes in this translation 3298 /// unit. 3299 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3300 3301 /// \brief Note that the vtable for the given class was used at the 3302 /// given location. 3303 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3304 bool DefinitionRequired = false); 3305 3306 /// MarkVirtualMembersReferenced - Will mark all members of the given 3307 /// CXXRecordDecl referenced. 3308 void MarkVirtualMembersReferenced(SourceLocation Loc, 3309 const CXXRecordDecl *RD); 3310 3311 /// \brief Define all of the vtables that have been used in this 3312 /// translation unit and reference any virtual members used by those 3313 /// vtables. 3314 /// 3315 /// \returns true if any work was done, false otherwise. 3316 bool DefineUsedVTables(); 3317 3318 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3319 3320 void ActOnMemInitializers(Decl *ConstructorDecl, 3321 SourceLocation ColonLoc, 3322 MemInitTy **MemInits, unsigned NumMemInits, 3323 bool AnyErrors); 3324 3325 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3326 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3327 Decl *TagDecl, 3328 SourceLocation LBrac, 3329 SourceLocation RBrac, 3330 AttributeList *AttrList); 3331 3332 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3333 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3334 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3335 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3336 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3337 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3338 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3339 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3340 bool IsInsideALocalClassWithinATemplateFunction(); 3341 3342 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3343 Expr *AssertExpr, 3344 Expr *AssertMessageExpr, 3345 SourceLocation RParenLoc); 3346 3347 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3348 TypeSourceInfo *TSInfo); 3349 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3350 MultiTemplateParamsArg TemplateParams); 3351 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3352 MultiTemplateParamsArg TemplateParams); 3353 3354 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3355 StorageClass& SC); 3356 void CheckConstructor(CXXConstructorDecl *Constructor); 3357 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3358 StorageClass& SC); 3359 bool CheckDestructor(CXXDestructorDecl *Destructor); 3360 void CheckConversionDeclarator(Declarator &D, QualType &R, 3361 StorageClass& SC); 3362 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3363 3364 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3365 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3366 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3367 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3368 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3369 3370 //===--------------------------------------------------------------------===// 3371 // C++ Derived Classes 3372 // 3373 3374 /// ActOnBaseSpecifier - Parsed a base specifier 3375 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3376 SourceRange SpecifierRange, 3377 bool Virtual, AccessSpecifier Access, 3378 TypeSourceInfo *TInfo, 3379 SourceLocation EllipsisLoc); 3380 3381 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3382 SourceRange SpecifierRange, 3383 bool Virtual, AccessSpecifier Access, 3384 ParsedType basetype, 3385 SourceLocation BaseLoc, 3386 SourceLocation EllipsisLoc); 3387 3388 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3389 unsigned NumBases); 3390 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3391 3392 bool IsDerivedFrom(QualType Derived, QualType Base); 3393 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3394 3395 // FIXME: I don't like this name. 3396 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3397 3398 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3399 3400 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3401 SourceLocation Loc, SourceRange Range, 3402 CXXCastPath *BasePath = 0, 3403 bool IgnoreAccess = false); 3404 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3405 unsigned InaccessibleBaseID, 3406 unsigned AmbigiousBaseConvID, 3407 SourceLocation Loc, SourceRange Range, 3408 DeclarationName Name, 3409 CXXCastPath *BasePath); 3410 3411 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3412 3413 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3414 /// covariant, according to C++ [class.virtual]p5. 3415 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3416 const CXXMethodDecl *Old); 3417 3418 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3419 /// spec is a subset of base spec. 3420 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3421 const CXXMethodDecl *Old); 3422 3423 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3424 3425 /// CheckOverrideControl - Check C++0x override control semantics. 3426 void CheckOverrideControl(const Decl *D); 3427 3428 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3429 /// overrides a virtual member function marked 'final', according to 3430 /// C++0x [class.virtual]p3. 3431 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3432 const CXXMethodDecl *Old); 3433 3434 3435 //===--------------------------------------------------------------------===// 3436 // C++ Access Control 3437 // 3438 3439 enum AccessResult { 3440 AR_accessible, 3441 AR_inaccessible, 3442 AR_dependent, 3443 AR_delayed 3444 }; 3445 3446 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3447 NamedDecl *PrevMemberDecl, 3448 AccessSpecifier LexicalAS); 3449 3450 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3451 DeclAccessPair FoundDecl); 3452 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3453 DeclAccessPair FoundDecl); 3454 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3455 SourceRange PlacementRange, 3456 CXXRecordDecl *NamingClass, 3457 DeclAccessPair FoundDecl, 3458 bool Diagnose = true); 3459 AccessResult CheckConstructorAccess(SourceLocation Loc, 3460 CXXConstructorDecl *D, 3461 const InitializedEntity &Entity, 3462 AccessSpecifier Access, 3463 bool IsCopyBindingRefToTemp = false); 3464 AccessResult CheckDestructorAccess(SourceLocation Loc, 3465 CXXDestructorDecl *Dtor, 3466 const PartialDiagnostic &PDiag); 3467 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3468 NamedDecl *D, 3469 const PartialDiagnostic &PDiag); 3470 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3471 Expr *ObjectExpr, 3472 Expr *ArgExpr, 3473 DeclAccessPair FoundDecl); 3474 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3475 DeclAccessPair FoundDecl); 3476 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3477 QualType Base, QualType Derived, 3478 const CXXBasePath &Path, 3479 unsigned DiagID, 3480 bool ForceCheck = false, 3481 bool ForceUnprivileged = false); 3482 void CheckLookupAccess(const LookupResult &R); 3483 3484 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3485 const MultiLevelTemplateArgumentList &TemplateArgs); 3486 void PerformDependentDiagnostics(const DeclContext *Pattern, 3487 const MultiLevelTemplateArgumentList &TemplateArgs); 3488 3489 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3490 3491 /// A flag to suppress access checking. 3492 bool SuppressAccessChecking; 3493 3494 /// \brief When true, access checking violations are treated as SFINAE 3495 /// failures rather than hard errors. 3496 bool AccessCheckingSFINAE; 3497 3498 void ActOnStartSuppressingAccessChecks(); 3499 void ActOnStopSuppressingAccessChecks(); 3500 3501 enum AbstractDiagSelID { 3502 AbstractNone = -1, 3503 AbstractReturnType, 3504 AbstractParamType, 3505 AbstractVariableType, 3506 AbstractFieldType, 3507 AbstractArrayType 3508 }; 3509 3510 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3511 const PartialDiagnostic &PD); 3512 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3513 3514 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3515 AbstractDiagSelID SelID = AbstractNone); 3516 3517 //===--------------------------------------------------------------------===// 3518 // C++ Overloaded Operators [C++ 13.5] 3519 // 3520 3521 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3522 3523 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3524 3525 //===--------------------------------------------------------------------===// 3526 // C++ Templates [C++ 14] 3527 // 3528 void FilterAcceptableTemplateNames(LookupResult &R); 3529 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3530 3531 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3532 QualType ObjectType, bool EnteringContext, 3533 bool &MemberOfUnknownSpecialization); 3534 3535 TemplateNameKind isTemplateName(Scope *S, 3536 CXXScopeSpec &SS, 3537 bool hasTemplateKeyword, 3538 UnqualifiedId &Name, 3539 ParsedType ObjectType, 3540 bool EnteringContext, 3541 TemplateTy &Template, 3542 bool &MemberOfUnknownSpecialization); 3543 3544 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3545 SourceLocation IILoc, 3546 Scope *S, 3547 const CXXScopeSpec *SS, 3548 TemplateTy &SuggestedTemplate, 3549 TemplateNameKind &SuggestedKind); 3550 3551 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3552 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3553 3554 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3555 SourceLocation EllipsisLoc, 3556 SourceLocation KeyLoc, 3557 IdentifierInfo *ParamName, 3558 SourceLocation ParamNameLoc, 3559 unsigned Depth, unsigned Position, 3560 SourceLocation EqualLoc, 3561 ParsedType DefaultArg); 3562 3563 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3564 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3565 unsigned Depth, 3566 unsigned Position, 3567 SourceLocation EqualLoc, 3568 Expr *DefaultArg); 3569 Decl *ActOnTemplateTemplateParameter(Scope *S, 3570 SourceLocation TmpLoc, 3571 TemplateParamsTy *Params, 3572 SourceLocation EllipsisLoc, 3573 IdentifierInfo *ParamName, 3574 SourceLocation ParamNameLoc, 3575 unsigned Depth, 3576 unsigned Position, 3577 SourceLocation EqualLoc, 3578 ParsedTemplateArgument DefaultArg); 3579 3580 TemplateParamsTy * 3581 ActOnTemplateParameterList(unsigned Depth, 3582 SourceLocation ExportLoc, 3583 SourceLocation TemplateLoc, 3584 SourceLocation LAngleLoc, 3585 Decl **Params, unsigned NumParams, 3586 SourceLocation RAngleLoc); 3587 3588 /// \brief The context in which we are checking a template parameter 3589 /// list. 3590 enum TemplateParamListContext { 3591 TPC_ClassTemplate, 3592 TPC_FunctionTemplate, 3593 TPC_ClassTemplateMember, 3594 TPC_FriendFunctionTemplate, 3595 TPC_FriendFunctionTemplateDefinition, 3596 TPC_TypeAliasTemplate 3597 }; 3598 3599 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3600 TemplateParameterList *OldParams, 3601 TemplateParamListContext TPC); 3602 TemplateParameterList * 3603 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3604 SourceLocation DeclLoc, 3605 const CXXScopeSpec &SS, 3606 TemplateParameterList **ParamLists, 3607 unsigned NumParamLists, 3608 bool IsFriend, 3609 bool &IsExplicitSpecialization, 3610 bool &Invalid); 3611 3612 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3613 SourceLocation KWLoc, CXXScopeSpec &SS, 3614 IdentifierInfo *Name, SourceLocation NameLoc, 3615 AttributeList *Attr, 3616 TemplateParameterList *TemplateParams, 3617 AccessSpecifier AS, 3618 unsigned NumOuterTemplateParamLists, 3619 TemplateParameterList **OuterTemplateParamLists); 3620 3621 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3622 TemplateArgumentListInfo &Out); 3623 3624 void NoteAllFoundTemplates(TemplateName Name); 3625 3626 QualType CheckTemplateIdType(TemplateName Template, 3627 SourceLocation TemplateLoc, 3628 TemplateArgumentListInfo &TemplateArgs); 3629 3630 TypeResult 3631 ActOnTemplateIdType(CXXScopeSpec &SS, 3632 TemplateTy Template, SourceLocation TemplateLoc, 3633 SourceLocation LAngleLoc, 3634 ASTTemplateArgsPtr TemplateArgs, 3635 SourceLocation RAngleLoc); 3636 3637 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3638 /// such as \c class T::template apply<U>. 3639 /// 3640 /// \param TUK 3641 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3642 TypeSpecifierType TagSpec, 3643 SourceLocation TagLoc, 3644 CXXScopeSpec &SS, 3645 TemplateTy TemplateD, 3646 SourceLocation TemplateLoc, 3647 SourceLocation LAngleLoc, 3648 ASTTemplateArgsPtr TemplateArgsIn, 3649 SourceLocation RAngleLoc); 3650 3651 3652 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3653 LookupResult &R, 3654 bool RequiresADL, 3655 const TemplateArgumentListInfo &TemplateArgs); 3656 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3657 const DeclarationNameInfo &NameInfo, 3658 const TemplateArgumentListInfo &TemplateArgs); 3659 3660 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3661 SourceLocation TemplateKWLoc, 3662 CXXScopeSpec &SS, 3663 UnqualifiedId &Name, 3664 ParsedType ObjectType, 3665 bool EnteringContext, 3666 TemplateTy &Template); 3667 3668 DeclResult 3669 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3670 SourceLocation KWLoc, 3671 CXXScopeSpec &SS, 3672 TemplateTy Template, 3673 SourceLocation TemplateNameLoc, 3674 SourceLocation LAngleLoc, 3675 ASTTemplateArgsPtr TemplateArgs, 3676 SourceLocation RAngleLoc, 3677 AttributeList *Attr, 3678 MultiTemplateParamsArg TemplateParameterLists); 3679 3680 Decl *ActOnTemplateDeclarator(Scope *S, 3681 MultiTemplateParamsArg TemplateParameterLists, 3682 Declarator &D); 3683 3684 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3685 MultiTemplateParamsArg TemplateParameterLists, 3686 Declarator &D); 3687 3688 bool 3689 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3690 TemplateSpecializationKind NewTSK, 3691 NamedDecl *PrevDecl, 3692 TemplateSpecializationKind PrevTSK, 3693 SourceLocation PrevPtOfInstantiation, 3694 bool &SuppressNew); 3695 3696 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3697 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3698 LookupResult &Previous); 3699 3700 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3701 TemplateArgumentListInfo *ExplicitTemplateArgs, 3702 LookupResult &Previous); 3703 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3704 3705 DeclResult 3706 ActOnExplicitInstantiation(Scope *S, 3707 SourceLocation ExternLoc, 3708 SourceLocation TemplateLoc, 3709 unsigned TagSpec, 3710 SourceLocation KWLoc, 3711 const CXXScopeSpec &SS, 3712 TemplateTy Template, 3713 SourceLocation TemplateNameLoc, 3714 SourceLocation LAngleLoc, 3715 ASTTemplateArgsPtr TemplateArgs, 3716 SourceLocation RAngleLoc, 3717 AttributeList *Attr); 3718 3719 DeclResult 3720 ActOnExplicitInstantiation(Scope *S, 3721 SourceLocation ExternLoc, 3722 SourceLocation TemplateLoc, 3723 unsigned TagSpec, 3724 SourceLocation KWLoc, 3725 CXXScopeSpec &SS, 3726 IdentifierInfo *Name, 3727 SourceLocation NameLoc, 3728 AttributeList *Attr); 3729 3730 DeclResult ActOnExplicitInstantiation(Scope *S, 3731 SourceLocation ExternLoc, 3732 SourceLocation TemplateLoc, 3733 Declarator &D); 3734 3735 TemplateArgumentLoc 3736 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3737 SourceLocation TemplateLoc, 3738 SourceLocation RAngleLoc, 3739 Decl *Param, 3740 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3741 3742 /// \brief Specifies the context in which a particular template 3743 /// argument is being checked. 3744 enum CheckTemplateArgumentKind { 3745 /// \brief The template argument was specified in the code or was 3746 /// instantiated with some deduced template arguments. 3747 CTAK_Specified, 3748 3749 /// \brief The template argument was deduced via template argument 3750 /// deduction. 3751 CTAK_Deduced, 3752 3753 /// \brief The template argument was deduced from an array bound 3754 /// via template argument deduction. 3755 CTAK_DeducedFromArrayBound 3756 }; 3757 3758 bool CheckTemplateArgument(NamedDecl *Param, 3759 const TemplateArgumentLoc &Arg, 3760 NamedDecl *Template, 3761 SourceLocation TemplateLoc, 3762 SourceLocation RAngleLoc, 3763 unsigned ArgumentPackIndex, 3764 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3765 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3766 3767 /// \brief Check that the given template arguments can be be provided to 3768 /// the given template, converting the arguments along the way. 3769 /// 3770 /// \param Template The template to which the template arguments are being 3771 /// provided. 3772 /// 3773 /// \param TemplateLoc The location of the template name in the source. 3774 /// 3775 /// \param TemplateArgs The list of template arguments. If the template is 3776 /// a template template parameter, this function may extend the set of 3777 /// template arguments to also include substituted, defaulted template 3778 /// arguments. 3779 /// 3780 /// \param PartialTemplateArgs True if the list of template arguments is 3781 /// intentionally partial, e.g., because we're checking just the initial 3782 /// set of template arguments. 3783 /// 3784 /// \param Converted Will receive the converted, canonicalized template 3785 /// arguments. 3786 /// 3787 /// \returns True if an error occurred, false otherwise. 3788 bool CheckTemplateArgumentList(TemplateDecl *Template, 3789 SourceLocation TemplateLoc, 3790 TemplateArgumentListInfo &TemplateArgs, 3791 bool PartialTemplateArgs, 3792 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3793 3794 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3795 const TemplateArgumentLoc &Arg, 3796 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3797 3798 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3799 TypeSourceInfo *Arg); 3800 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3801 TemplateArgument &Converted); 3802 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3803 QualType InstantiatedParamType, Expr *Arg, 3804 TemplateArgument &Converted, 3805 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3806 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3807 const TemplateArgumentLoc &Arg); 3808 3809 ExprResult 3810 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3811 QualType ParamType, 3812 SourceLocation Loc); 3813 ExprResult 3814 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3815 SourceLocation Loc); 3816 3817 /// \brief Enumeration describing how template parameter lists are compared 3818 /// for equality. 3819 enum TemplateParameterListEqualKind { 3820 /// \brief We are matching the template parameter lists of two templates 3821 /// that might be redeclarations. 3822 /// 3823 /// \code 3824 /// template<typename T> struct X; 3825 /// template<typename T> struct X; 3826 /// \endcode 3827 TPL_TemplateMatch, 3828 3829 /// \brief We are matching the template parameter lists of two template 3830 /// template parameters as part of matching the template parameter lists 3831 /// of two templates that might be redeclarations. 3832 /// 3833 /// \code 3834 /// template<template<int I> class TT> struct X; 3835 /// template<template<int Value> class Other> struct X; 3836 /// \endcode 3837 TPL_TemplateTemplateParmMatch, 3838 3839 /// \brief We are matching the template parameter lists of a template 3840 /// template argument against the template parameter lists of a template 3841 /// template parameter. 3842 /// 3843 /// \code 3844 /// template<template<int Value> class Metafun> struct X; 3845 /// template<int Value> struct integer_c; 3846 /// X<integer_c> xic; 3847 /// \endcode 3848 TPL_TemplateTemplateArgumentMatch 3849 }; 3850 3851 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3852 TemplateParameterList *Old, 3853 bool Complain, 3854 TemplateParameterListEqualKind Kind, 3855 SourceLocation TemplateArgLoc 3856 = SourceLocation()); 3857 3858 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3859 3860 /// \brief Called when the parser has parsed a C++ typename 3861 /// specifier, e.g., "typename T::type". 3862 /// 3863 /// \param S The scope in which this typename type occurs. 3864 /// \param TypenameLoc the location of the 'typename' keyword 3865 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3866 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3867 /// \param IdLoc the location of the identifier. 3868 TypeResult 3869 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3870 const CXXScopeSpec &SS, const IdentifierInfo &II, 3871 SourceLocation IdLoc); 3872 3873 /// \brief Called when the parser has parsed a C++ typename 3874 /// specifier that ends in a template-id, e.g., 3875 /// "typename MetaFun::template apply<T1, T2>". 3876 /// 3877 /// \param S The scope in which this typename type occurs. 3878 /// \param TypenameLoc the location of the 'typename' keyword 3879 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3880 /// \param TemplateLoc the location of the 'template' keyword, if any. 3881 /// \param TemplateName The template name. 3882 /// \param TemplateNameLoc The location of the template name. 3883 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3884 /// \param TemplateArgs The template arguments. 3885 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3886 TypeResult 3887 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3888 const CXXScopeSpec &SS, 3889 SourceLocation TemplateLoc, 3890 TemplateTy Template, 3891 SourceLocation TemplateNameLoc, 3892 SourceLocation LAngleLoc, 3893 ASTTemplateArgsPtr TemplateArgs, 3894 SourceLocation RAngleLoc); 3895 3896 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3897 SourceLocation KeywordLoc, 3898 NestedNameSpecifierLoc QualifierLoc, 3899 const IdentifierInfo &II, 3900 SourceLocation IILoc); 3901 3902 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3903 SourceLocation Loc, 3904 DeclarationName Name); 3905 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3906 3907 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3908 3909 std::string 3910 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3911 const TemplateArgumentList &Args); 3912 3913 std::string 3914 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3915 const TemplateArgument *Args, 3916 unsigned NumArgs); 3917 3918 //===--------------------------------------------------------------------===// 3919 // C++ Variadic Templates (C++0x [temp.variadic]) 3920 //===--------------------------------------------------------------------===// 3921 3922 /// \brief The context in which an unexpanded parameter pack is 3923 /// being diagnosed. 3924 /// 3925 /// Note that the values of this enumeration line up with the first 3926 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3927 enum UnexpandedParameterPackContext { 3928 /// \brief An arbitrary expression. 3929 UPPC_Expression = 0, 3930 3931 /// \brief The base type of a class type. 3932 UPPC_BaseType, 3933 3934 /// \brief The type of an arbitrary declaration. 3935 UPPC_DeclarationType, 3936 3937 /// \brief The type of a data member. 3938 UPPC_DataMemberType, 3939 3940 /// \brief The size of a bit-field. 3941 UPPC_BitFieldWidth, 3942 3943 /// \brief The expression in a static assertion. 3944 UPPC_StaticAssertExpression, 3945 3946 /// \brief The fixed underlying type of an enumeration. 3947 UPPC_FixedUnderlyingType, 3948 3949 /// \brief The enumerator value. 3950 UPPC_EnumeratorValue, 3951 3952 /// \brief A using declaration. 3953 UPPC_UsingDeclaration, 3954 3955 /// \brief A friend declaration. 3956 UPPC_FriendDeclaration, 3957 3958 /// \brief A declaration qualifier. 3959 UPPC_DeclarationQualifier, 3960 3961 /// \brief An initializer. 3962 UPPC_Initializer, 3963 3964 /// \brief A default argument. 3965 UPPC_DefaultArgument, 3966 3967 /// \brief The type of a non-type template parameter. 3968 UPPC_NonTypeTemplateParameterType, 3969 3970 /// \brief The type of an exception. 3971 UPPC_ExceptionType, 3972 3973 /// \brief Partial specialization. 3974 UPPC_PartialSpecialization 3975 }; 3976 3977 /// \brief If the given type contains an unexpanded parameter pack, 3978 /// diagnose the error. 3979 /// 3980 /// \param Loc The source location where a diagnostc should be emitted. 3981 /// 3982 /// \param T The type that is being checked for unexpanded parameter 3983 /// packs. 3984 /// 3985 /// \returns true if an error occurred, false otherwise. 3986 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3987 UnexpandedParameterPackContext UPPC); 3988 3989 /// \brief If the given expression contains an unexpanded parameter 3990 /// pack, diagnose the error. 3991 /// 3992 /// \param E The expression that is being checked for unexpanded 3993 /// parameter packs. 3994 /// 3995 /// \returns true if an error occurred, false otherwise. 3996 bool DiagnoseUnexpandedParameterPack(Expr *E, 3997 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3998 3999 /// \brief If the given nested-name-specifier contains an unexpanded 4000 /// parameter pack, diagnose the error. 4001 /// 4002 /// \param SS The nested-name-specifier that is being checked for 4003 /// unexpanded parameter packs. 4004 /// 4005 /// \returns true if an error occurred, false otherwise. 4006 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4007 UnexpandedParameterPackContext UPPC); 4008 4009 /// \brief If the given name contains an unexpanded parameter pack, 4010 /// diagnose the error. 4011 /// 4012 /// \param NameInfo The name (with source location information) that 4013 /// is being checked for unexpanded parameter packs. 4014 /// 4015 /// \returns true if an error occurred, false otherwise. 4016 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4017 UnexpandedParameterPackContext UPPC); 4018 4019 /// \brief If the given template name contains an unexpanded parameter pack, 4020 /// diagnose the error. 4021 /// 4022 /// \param Loc The location of the template name. 4023 /// 4024 /// \param Template The template name that is being checked for unexpanded 4025 /// parameter packs. 4026 /// 4027 /// \returns true if an error occurred, false otherwise. 4028 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4029 TemplateName Template, 4030 UnexpandedParameterPackContext UPPC); 4031 4032 /// \brief If the given template argument contains an unexpanded parameter 4033 /// pack, diagnose the error. 4034 /// 4035 /// \param Arg The template argument that is being checked for unexpanded 4036 /// parameter packs. 4037 /// 4038 /// \returns true if an error occurred, false otherwise. 4039 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4040 UnexpandedParameterPackContext UPPC); 4041 4042 /// \brief Collect the set of unexpanded parameter packs within the given 4043 /// template argument. 4044 /// 4045 /// \param Arg The template argument that will be traversed to find 4046 /// unexpanded parameter packs. 4047 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4048 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4049 4050 /// \brief Collect the set of unexpanded parameter packs within the given 4051 /// template argument. 4052 /// 4053 /// \param Arg The template argument that will be traversed to find 4054 /// unexpanded parameter packs. 4055 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4056 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4057 4058 /// \brief Collect the set of unexpanded parameter packs within the given 4059 /// type. 4060 /// 4061 /// \param T The type that will be traversed to find 4062 /// unexpanded parameter packs. 4063 void collectUnexpandedParameterPacks(QualType T, 4064 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4065 4066 /// \brief Collect the set of unexpanded parameter packs within the given 4067 /// type. 4068 /// 4069 /// \param TL The type that will be traversed to find 4070 /// unexpanded parameter packs. 4071 void collectUnexpandedParameterPacks(TypeLoc TL, 4072 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4073 4074 /// \brief Invoked when parsing a template argument followed by an 4075 /// ellipsis, which creates a pack expansion. 4076 /// 4077 /// \param Arg The template argument preceding the ellipsis, which 4078 /// may already be invalid. 4079 /// 4080 /// \param EllipsisLoc The location of the ellipsis. 4081 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4082 SourceLocation EllipsisLoc); 4083 4084 /// \brief Invoked when parsing a type followed by an ellipsis, which 4085 /// creates a pack expansion. 4086 /// 4087 /// \param Type The type preceding the ellipsis, which will become 4088 /// the pattern of the pack expansion. 4089 /// 4090 /// \param EllipsisLoc The location of the ellipsis. 4091 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4092 4093 /// \brief Construct a pack expansion type from the pattern of the pack 4094 /// expansion. 4095 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4096 SourceLocation EllipsisLoc, 4097 llvm::Optional<unsigned> NumExpansions); 4098 4099 /// \brief Construct a pack expansion type from the pattern of the pack 4100 /// expansion. 4101 QualType CheckPackExpansion(QualType Pattern, 4102 SourceRange PatternRange, 4103 SourceLocation EllipsisLoc, 4104 llvm::Optional<unsigned> NumExpansions); 4105 4106 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4107 /// creates a pack expansion. 4108 /// 4109 /// \param Pattern The expression preceding the ellipsis, which will become 4110 /// the pattern of the pack expansion. 4111 /// 4112 /// \param EllipsisLoc The location of the ellipsis. 4113 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4114 4115 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4116 /// creates a pack expansion. 4117 /// 4118 /// \param Pattern The expression preceding the ellipsis, which will become 4119 /// the pattern of the pack expansion. 4120 /// 4121 /// \param EllipsisLoc The location of the ellipsis. 4122 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4123 llvm::Optional<unsigned> NumExpansions); 4124 4125 /// \brief Determine whether we could expand a pack expansion with the 4126 /// given set of parameter packs into separate arguments by repeatedly 4127 /// transforming the pattern. 4128 /// 4129 /// \param EllipsisLoc The location of the ellipsis that identifies the 4130 /// pack expansion. 4131 /// 4132 /// \param PatternRange The source range that covers the entire pattern of 4133 /// the pack expansion. 4134 /// 4135 /// \param Unexpanded The set of unexpanded parameter packs within the 4136 /// pattern. 4137 /// 4138 /// \param NumUnexpanded The number of unexpanded parameter packs in 4139 /// \p Unexpanded. 4140 /// 4141 /// \param ShouldExpand Will be set to \c true if the transformer should 4142 /// expand the corresponding pack expansions into separate arguments. When 4143 /// set, \c NumExpansions must also be set. 4144 /// 4145 /// \param RetainExpansion Whether the caller should add an unexpanded 4146 /// pack expansion after all of the expanded arguments. This is used 4147 /// when extending explicitly-specified template argument packs per 4148 /// C++0x [temp.arg.explicit]p9. 4149 /// 4150 /// \param NumExpansions The number of separate arguments that will be in 4151 /// the expanded form of the corresponding pack expansion. This is both an 4152 /// input and an output parameter, which can be set by the caller if the 4153 /// number of expansions is known a priori (e.g., due to a prior substitution) 4154 /// and will be set by the callee when the number of expansions is known. 4155 /// The callee must set this value when \c ShouldExpand is \c true; it may 4156 /// set this value in other cases. 4157 /// 4158 /// \returns true if an error occurred (e.g., because the parameter packs 4159 /// are to be instantiated with arguments of different lengths), false 4160 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4161 /// must be set. 4162 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4163 SourceRange PatternRange, 4164 const UnexpandedParameterPack *Unexpanded, 4165 unsigned NumUnexpanded, 4166 const MultiLevelTemplateArgumentList &TemplateArgs, 4167 bool &ShouldExpand, 4168 bool &RetainExpansion, 4169 llvm::Optional<unsigned> &NumExpansions); 4170 4171 /// \brief Determine the number of arguments in the given pack expansion 4172 /// type. 4173 /// 4174 /// This routine already assumes that the pack expansion type can be 4175 /// expanded and that the number of arguments in the expansion is 4176 /// consistent across all of the unexpanded parameter packs in its pattern. 4177 unsigned getNumArgumentsInExpansion(QualType T, 4178 const MultiLevelTemplateArgumentList &TemplateArgs); 4179 4180 /// \brief Determine whether the given declarator contains any unexpanded 4181 /// parameter packs. 4182 /// 4183 /// This routine is used by the parser to disambiguate function declarators 4184 /// with an ellipsis prior to the ')', e.g., 4185 /// 4186 /// \code 4187 /// void f(T...); 4188 /// \endcode 4189 /// 4190 /// To determine whether we have an (unnamed) function parameter pack or 4191 /// a variadic function. 4192 /// 4193 /// \returns true if the declarator contains any unexpanded parameter packs, 4194 /// false otherwise. 4195 bool containsUnexpandedParameterPacks(Declarator &D); 4196 4197 //===--------------------------------------------------------------------===// 4198 // C++ Template Argument Deduction (C++ [temp.deduct]) 4199 //===--------------------------------------------------------------------===// 4200 4201 /// \brief Describes the result of template argument deduction. 4202 /// 4203 /// The TemplateDeductionResult enumeration describes the result of 4204 /// template argument deduction, as returned from 4205 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4206 /// structure provides additional information about the results of 4207 /// template argument deduction, e.g., the deduced template argument 4208 /// list (if successful) or the specific template parameters or 4209 /// deduced arguments that were involved in the failure. 4210 enum TemplateDeductionResult { 4211 /// \brief Template argument deduction was successful. 4212 TDK_Success = 0, 4213 /// \brief Template argument deduction exceeded the maximum template 4214 /// instantiation depth (which has already been diagnosed). 4215 TDK_InstantiationDepth, 4216 /// \brief Template argument deduction did not deduce a value 4217 /// for every template parameter. 4218 TDK_Incomplete, 4219 /// \brief Template argument deduction produced inconsistent 4220 /// deduced values for the given template parameter. 4221 TDK_Inconsistent, 4222 /// \brief Template argument deduction failed due to inconsistent 4223 /// cv-qualifiers on a template parameter type that would 4224 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4225 /// but were given a non-const "X". 4226 TDK_Underqualified, 4227 /// \brief Substitution of the deduced template argument values 4228 /// resulted in an error. 4229 TDK_SubstitutionFailure, 4230 /// \brief Substitution of the deduced template argument values 4231 /// into a non-deduced context produced a type or value that 4232 /// produces a type that does not match the original template 4233 /// arguments provided. 4234 TDK_NonDeducedMismatch, 4235 /// \brief When performing template argument deduction for a function 4236 /// template, there were too many call arguments. 4237 TDK_TooManyArguments, 4238 /// \brief When performing template argument deduction for a function 4239 /// template, there were too few call arguments. 4240 TDK_TooFewArguments, 4241 /// \brief The explicitly-specified template arguments were not valid 4242 /// template arguments for the given template. 4243 TDK_InvalidExplicitArguments, 4244 /// \brief The arguments included an overloaded function name that could 4245 /// not be resolved to a suitable function. 4246 TDK_FailedOverloadResolution 4247 }; 4248 4249 TemplateDeductionResult 4250 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4251 const TemplateArgumentList &TemplateArgs, 4252 sema::TemplateDeductionInfo &Info); 4253 4254 TemplateDeductionResult 4255 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4256 TemplateArgumentListInfo &ExplicitTemplateArgs, 4257 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4258 llvm::SmallVectorImpl<QualType> &ParamTypes, 4259 QualType *FunctionType, 4260 sema::TemplateDeductionInfo &Info); 4261 4262 TemplateDeductionResult 4263 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4264 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4265 unsigned NumExplicitlySpecified, 4266 FunctionDecl *&Specialization, 4267 sema::TemplateDeductionInfo &Info); 4268 4269 TemplateDeductionResult 4270 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4271 TemplateArgumentListInfo *ExplicitTemplateArgs, 4272 Expr **Args, unsigned NumArgs, 4273 FunctionDecl *&Specialization, 4274 sema::TemplateDeductionInfo &Info); 4275 4276 TemplateDeductionResult 4277 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4278 TemplateArgumentListInfo *ExplicitTemplateArgs, 4279 QualType ArgFunctionType, 4280 FunctionDecl *&Specialization, 4281 sema::TemplateDeductionInfo &Info); 4282 4283 TemplateDeductionResult 4284 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4285 QualType ToType, 4286 CXXConversionDecl *&Specialization, 4287 sema::TemplateDeductionInfo &Info); 4288 4289 TemplateDeductionResult 4290 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4291 TemplateArgumentListInfo *ExplicitTemplateArgs, 4292 FunctionDecl *&Specialization, 4293 sema::TemplateDeductionInfo &Info); 4294 4295 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4296 TypeSourceInfo *&Result); 4297 4298 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4299 FunctionTemplateDecl *FT2, 4300 SourceLocation Loc, 4301 TemplatePartialOrderingContext TPOC, 4302 unsigned NumCallArguments); 4303 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4304 UnresolvedSetIterator SEnd, 4305 TemplatePartialOrderingContext TPOC, 4306 unsigned NumCallArguments, 4307 SourceLocation Loc, 4308 const PartialDiagnostic &NoneDiag, 4309 const PartialDiagnostic &AmbigDiag, 4310 const PartialDiagnostic &CandidateDiag, 4311 bool Complain = true); 4312 4313 ClassTemplatePartialSpecializationDecl * 4314 getMoreSpecializedPartialSpecialization( 4315 ClassTemplatePartialSpecializationDecl *PS1, 4316 ClassTemplatePartialSpecializationDecl *PS2, 4317 SourceLocation Loc); 4318 4319 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4320 bool OnlyDeduced, 4321 unsigned Depth, 4322 llvm::SmallVectorImpl<bool> &Used); 4323 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4324 llvm::SmallVectorImpl<bool> &Deduced); 4325 4326 //===--------------------------------------------------------------------===// 4327 // C++ Template Instantiation 4328 // 4329 4330 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4331 const TemplateArgumentList *Innermost = 0, 4332 bool RelativeToPrimary = false, 4333 const FunctionDecl *Pattern = 0); 4334 4335 /// \brief A template instantiation that is currently in progress. 4336 struct ActiveTemplateInstantiation { 4337 /// \brief The kind of template instantiation we are performing 4338 enum InstantiationKind { 4339 /// We are instantiating a template declaration. The entity is 4340 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4341 TemplateInstantiation, 4342 4343 /// We are instantiating a default argument for a template 4344 /// parameter. The Entity is the template, and 4345 /// TemplateArgs/NumTemplateArguments provides the template 4346 /// arguments as specified. 4347 /// FIXME: Use a TemplateArgumentList 4348 DefaultTemplateArgumentInstantiation, 4349 4350 /// We are instantiating a default argument for a function. 4351 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4352 /// provides the template arguments as specified. 4353 DefaultFunctionArgumentInstantiation, 4354 4355 /// We are substituting explicit template arguments provided for 4356 /// a function template. The entity is a FunctionTemplateDecl. 4357 ExplicitTemplateArgumentSubstitution, 4358 4359 /// We are substituting template argument determined as part of 4360 /// template argument deduction for either a class template 4361 /// partial specialization or a function template. The 4362 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4363 /// a FunctionTemplateDecl. 4364 DeducedTemplateArgumentSubstitution, 4365 4366 /// We are substituting prior template arguments into a new 4367 /// template parameter. The template parameter itself is either a 4368 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4369 PriorTemplateArgumentSubstitution, 4370 4371 /// We are checking the validity of a default template argument that 4372 /// has been used when naming a template-id. 4373 DefaultTemplateArgumentChecking 4374 } Kind; 4375 4376 /// \brief The point of instantiation within the source code. 4377 SourceLocation PointOfInstantiation; 4378 4379 /// \brief The template (or partial specialization) in which we are 4380 /// performing the instantiation, for substitutions of prior template 4381 /// arguments. 4382 NamedDecl *Template; 4383 4384 /// \brief The entity that is being instantiated. 4385 uintptr_t Entity; 4386 4387 /// \brief The list of template arguments we are substituting, if they 4388 /// are not part of the entity. 4389 const TemplateArgument *TemplateArgs; 4390 4391 /// \brief The number of template arguments in TemplateArgs. 4392 unsigned NumTemplateArgs; 4393 4394 /// \brief The template deduction info object associated with the 4395 /// substitution or checking of explicit or deduced template arguments. 4396 sema::TemplateDeductionInfo *DeductionInfo; 4397 4398 /// \brief The source range that covers the construct that cause 4399 /// the instantiation, e.g., the template-id that causes a class 4400 /// template instantiation. 4401 SourceRange InstantiationRange; 4402 4403 ActiveTemplateInstantiation() 4404 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4405 NumTemplateArgs(0), DeductionInfo(0) {} 4406 4407 /// \brief Determines whether this template is an actual instantiation 4408 /// that should be counted toward the maximum instantiation depth. 4409 bool isInstantiationRecord() const; 4410 4411 friend bool operator==(const ActiveTemplateInstantiation &X, 4412 const ActiveTemplateInstantiation &Y) { 4413 if (X.Kind != Y.Kind) 4414 return false; 4415 4416 if (X.Entity != Y.Entity) 4417 return false; 4418 4419 switch (X.Kind) { 4420 case TemplateInstantiation: 4421 return true; 4422 4423 case PriorTemplateArgumentSubstitution: 4424 case DefaultTemplateArgumentChecking: 4425 if (X.Template != Y.Template) 4426 return false; 4427 4428 // Fall through 4429 4430 case DefaultTemplateArgumentInstantiation: 4431 case ExplicitTemplateArgumentSubstitution: 4432 case DeducedTemplateArgumentSubstitution: 4433 case DefaultFunctionArgumentInstantiation: 4434 return X.TemplateArgs == Y.TemplateArgs; 4435 4436 } 4437 4438 return true; 4439 } 4440 4441 friend bool operator!=(const ActiveTemplateInstantiation &X, 4442 const ActiveTemplateInstantiation &Y) { 4443 return !(X == Y); 4444 } 4445 }; 4446 4447 /// \brief List of active template instantiations. 4448 /// 4449 /// This vector is treated as a stack. As one template instantiation 4450 /// requires another template instantiation, additional 4451 /// instantiations are pushed onto the stack up to a 4452 /// user-configurable limit LangOptions::InstantiationDepth. 4453 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4454 ActiveTemplateInstantiations; 4455 4456 /// \brief Whether we are in a SFINAE context that is not associated with 4457 /// template instantiation. 4458 /// 4459 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4460 /// of a template instantiation or template argument deduction. 4461 bool InNonInstantiationSFINAEContext; 4462 4463 /// \brief The number of ActiveTemplateInstantiation entries in 4464 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4465 /// therefore, should not be counted as part of the instantiation depth. 4466 unsigned NonInstantiationEntries; 4467 4468 /// \brief The last template from which a template instantiation 4469 /// error or warning was produced. 4470 /// 4471 /// This value is used to suppress printing of redundant template 4472 /// instantiation backtraces when there are multiple errors in the 4473 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4474 /// to implement it anywhere else. 4475 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4476 4477 /// \brief The current index into pack expansion arguments that will be 4478 /// used for substitution of parameter packs. 4479 /// 4480 /// The pack expansion index will be -1 to indicate that parameter packs 4481 /// should be instantiated as themselves. Otherwise, the index specifies 4482 /// which argument within the parameter pack will be used for substitution. 4483 int ArgumentPackSubstitutionIndex; 4484 4485 /// \brief RAII object used to change the argument pack substitution index 4486 /// within a \c Sema object. 4487 /// 4488 /// See \c ArgumentPackSubstitutionIndex for more information. 4489 class ArgumentPackSubstitutionIndexRAII { 4490 Sema &Self; 4491 int OldSubstitutionIndex; 4492 4493 public: 4494 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4495 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4496 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4497 } 4498 4499 ~ArgumentPackSubstitutionIndexRAII() { 4500 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4501 } 4502 }; 4503 4504 friend class ArgumentPackSubstitutionRAII; 4505 4506 /// \brief The stack of calls expression undergoing template instantiation. 4507 /// 4508 /// The top of this stack is used by a fixit instantiating unresolved 4509 /// function calls to fix the AST to match the textual change it prints. 4510 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4511 4512 /// \brief For each declaration that involved template argument deduction, the 4513 /// set of diagnostics that were suppressed during that template argument 4514 /// deduction. 4515 /// 4516 /// FIXME: Serialize this structure to the AST file. 4517 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4518 SuppressedDiagnostics; 4519 4520 /// \brief A stack object to be created when performing template 4521 /// instantiation. 4522 /// 4523 /// Construction of an object of type \c InstantiatingTemplate 4524 /// pushes the current instantiation onto the stack of active 4525 /// instantiations. If the size of this stack exceeds the maximum 4526 /// number of recursive template instantiations, construction 4527 /// produces an error and evaluates true. 4528 /// 4529 /// Destruction of this object will pop the named instantiation off 4530 /// the stack. 4531 struct InstantiatingTemplate { 4532 /// \brief Note that we are instantiating a class template, 4533 /// function template, or a member thereof. 4534 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4535 Decl *Entity, 4536 SourceRange InstantiationRange = SourceRange()); 4537 4538 /// \brief Note that we are instantiating a default argument in a 4539 /// template-id. 4540 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4541 TemplateDecl *Template, 4542 const TemplateArgument *TemplateArgs, 4543 unsigned NumTemplateArgs, 4544 SourceRange InstantiationRange = SourceRange()); 4545 4546 /// \brief Note that we are instantiating a default argument in a 4547 /// template-id. 4548 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4549 FunctionTemplateDecl *FunctionTemplate, 4550 const TemplateArgument *TemplateArgs, 4551 unsigned NumTemplateArgs, 4552 ActiveTemplateInstantiation::InstantiationKind Kind, 4553 sema::TemplateDeductionInfo &DeductionInfo, 4554 SourceRange InstantiationRange = SourceRange()); 4555 4556 /// \brief Note that we are instantiating as part of template 4557 /// argument deduction for a class template partial 4558 /// specialization. 4559 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4560 ClassTemplatePartialSpecializationDecl *PartialSpec, 4561 const TemplateArgument *TemplateArgs, 4562 unsigned NumTemplateArgs, 4563 sema::TemplateDeductionInfo &DeductionInfo, 4564 SourceRange InstantiationRange = SourceRange()); 4565 4566 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4567 ParmVarDecl *Param, 4568 const TemplateArgument *TemplateArgs, 4569 unsigned NumTemplateArgs, 4570 SourceRange InstantiationRange = SourceRange()); 4571 4572 /// \brief Note that we are substituting prior template arguments into a 4573 /// non-type or template template parameter. 4574 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4575 NamedDecl *Template, 4576 NonTypeTemplateParmDecl *Param, 4577 const TemplateArgument *TemplateArgs, 4578 unsigned NumTemplateArgs, 4579 SourceRange InstantiationRange); 4580 4581 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4582 NamedDecl *Template, 4583 TemplateTemplateParmDecl *Param, 4584 const TemplateArgument *TemplateArgs, 4585 unsigned NumTemplateArgs, 4586 SourceRange InstantiationRange); 4587 4588 /// \brief Note that we are checking the default template argument 4589 /// against the template parameter for a given template-id. 4590 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4591 TemplateDecl *Template, 4592 NamedDecl *Param, 4593 const TemplateArgument *TemplateArgs, 4594 unsigned NumTemplateArgs, 4595 SourceRange InstantiationRange); 4596 4597 4598 /// \brief Note that we have finished instantiating this template. 4599 void Clear(); 4600 4601 ~InstantiatingTemplate() { Clear(); } 4602 4603 /// \brief Determines whether we have exceeded the maximum 4604 /// recursive template instantiations. 4605 operator bool() const { return Invalid; } 4606 4607 private: 4608 Sema &SemaRef; 4609 bool Invalid; 4610 bool SavedInNonInstantiationSFINAEContext; 4611 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4612 SourceRange InstantiationRange); 4613 4614 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4615 4616 InstantiatingTemplate& 4617 operator=(const InstantiatingTemplate&); // not implemented 4618 }; 4619 4620 void PrintInstantiationStack(); 4621 4622 /// \brief Determines whether we are currently in a context where 4623 /// template argument substitution failures are not considered 4624 /// errors. 4625 /// 4626 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4627 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4628 /// template-deduction context object, which can be used to capture 4629 /// diagnostics that will be suppressed. 4630 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4631 4632 /// \brief RAII class used to determine whether SFINAE has 4633 /// trapped any errors that occur during template argument 4634 /// deduction.` 4635 class SFINAETrap { 4636 Sema &SemaRef; 4637 unsigned PrevSFINAEErrors; 4638 bool PrevInNonInstantiationSFINAEContext; 4639 bool PrevAccessCheckingSFINAE; 4640 4641 public: 4642 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4643 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4644 PrevInNonInstantiationSFINAEContext( 4645 SemaRef.InNonInstantiationSFINAEContext), 4646 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4647 { 4648 if (!SemaRef.isSFINAEContext()) 4649 SemaRef.InNonInstantiationSFINAEContext = true; 4650 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4651 } 4652 4653 ~SFINAETrap() { 4654 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4655 SemaRef.InNonInstantiationSFINAEContext 4656 = PrevInNonInstantiationSFINAEContext; 4657 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4658 } 4659 4660 /// \brief Determine whether any SFINAE errors have been trapped. 4661 bool hasErrorOccurred() const { 4662 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4663 } 4664 }; 4665 4666 /// \brief The current instantiation scope used to store local 4667 /// variables. 4668 LocalInstantiationScope *CurrentInstantiationScope; 4669 4670 /// \brief The number of typos corrected by CorrectTypo. 4671 unsigned TyposCorrected; 4672 4673 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4674 UnqualifiedTyposCorrectedMap; 4675 4676 /// \brief A cache containing the results of typo correction for unqualified 4677 /// name lookup. 4678 /// 4679 /// The string is the string that we corrected to (which may be empty, if 4680 /// there was no correction), while the boolean will be true when the 4681 /// string represents a keyword. 4682 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4683 4684 /// \brief Worker object for performing CFG-based warnings. 4685 sema::AnalysisBasedWarnings AnalysisWarnings; 4686 4687 /// \brief An entity for which implicit template instantiation is required. 4688 /// 4689 /// The source location associated with the declaration is the first place in 4690 /// the source code where the declaration was "used". It is not necessarily 4691 /// the point of instantiation (which will be either before or after the 4692 /// namespace-scope declaration that triggered this implicit instantiation), 4693 /// However, it is the location that diagnostics should generally refer to, 4694 /// because users will need to know what code triggered the instantiation. 4695 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4696 4697 /// \brief The queue of implicit template instantiations that are required 4698 /// but have not yet been performed. 4699 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4700 4701 /// \brief The queue of implicit template instantiations that are required 4702 /// and must be performed within the current local scope. 4703 /// 4704 /// This queue is only used for member functions of local classes in 4705 /// templates, which must be instantiated in the same scope as their 4706 /// enclosing function, so that they can reference function-local 4707 /// types, static variables, enumerators, etc. 4708 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4709 4710 void PerformPendingInstantiations(bool LocalOnly = false); 4711 4712 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4713 const MultiLevelTemplateArgumentList &TemplateArgs, 4714 SourceLocation Loc, DeclarationName Entity); 4715 4716 QualType SubstType(QualType T, 4717 const MultiLevelTemplateArgumentList &TemplateArgs, 4718 SourceLocation Loc, DeclarationName Entity); 4719 4720 TypeSourceInfo *SubstType(TypeLoc TL, 4721 const MultiLevelTemplateArgumentList &TemplateArgs, 4722 SourceLocation Loc, DeclarationName Entity); 4723 4724 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4725 const MultiLevelTemplateArgumentList &TemplateArgs, 4726 SourceLocation Loc, 4727 DeclarationName Entity); 4728 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4729 const MultiLevelTemplateArgumentList &TemplateArgs, 4730 int indexAdjustment, 4731 llvm::Optional<unsigned> NumExpansions); 4732 bool SubstParmTypes(SourceLocation Loc, 4733 ParmVarDecl **Params, unsigned NumParams, 4734 const MultiLevelTemplateArgumentList &TemplateArgs, 4735 llvm::SmallVectorImpl<QualType> &ParamTypes, 4736 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4737 ExprResult SubstExpr(Expr *E, 4738 const MultiLevelTemplateArgumentList &TemplateArgs); 4739 4740 /// \brief Substitute the given template arguments into a list of 4741 /// expressions, expanding pack expansions if required. 4742 /// 4743 /// \param Exprs The list of expressions to substitute into. 4744 /// 4745 /// \param NumExprs The number of expressions in \p Exprs. 4746 /// 4747 /// \param IsCall Whether this is some form of call, in which case 4748 /// default arguments will be dropped. 4749 /// 4750 /// \param TemplateArgs The set of template arguments to substitute. 4751 /// 4752 /// \param Outputs Will receive all of the substituted arguments. 4753 /// 4754 /// \returns true if an error occurred, false otherwise. 4755 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4756 const MultiLevelTemplateArgumentList &TemplateArgs, 4757 llvm::SmallVectorImpl<Expr *> &Outputs); 4758 4759 StmtResult SubstStmt(Stmt *S, 4760 const MultiLevelTemplateArgumentList &TemplateArgs); 4761 4762 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4763 const MultiLevelTemplateArgumentList &TemplateArgs); 4764 4765 bool 4766 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4767 CXXRecordDecl *Pattern, 4768 const MultiLevelTemplateArgumentList &TemplateArgs); 4769 4770 bool 4771 InstantiateClass(SourceLocation PointOfInstantiation, 4772 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4773 const MultiLevelTemplateArgumentList &TemplateArgs, 4774 TemplateSpecializationKind TSK, 4775 bool Complain = true); 4776 4777 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4778 Decl *Pattern, Decl *Inst); 4779 4780 bool 4781 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4782 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4783 TemplateSpecializationKind TSK, 4784 bool Complain = true); 4785 4786 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4787 CXXRecordDecl *Instantiation, 4788 const MultiLevelTemplateArgumentList &TemplateArgs, 4789 TemplateSpecializationKind TSK); 4790 4791 void InstantiateClassTemplateSpecializationMembers( 4792 SourceLocation PointOfInstantiation, 4793 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4794 TemplateSpecializationKind TSK); 4795 4796 NestedNameSpecifierLoc 4797 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4798 const MultiLevelTemplateArgumentList &TemplateArgs); 4799 4800 DeclarationNameInfo 4801 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4802 const MultiLevelTemplateArgumentList &TemplateArgs); 4803 TemplateName 4804 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4805 SourceLocation Loc, 4806 const MultiLevelTemplateArgumentList &TemplateArgs); 4807 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4808 TemplateArgumentListInfo &Result, 4809 const MultiLevelTemplateArgumentList &TemplateArgs); 4810 4811 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4812 FunctionDecl *Function, 4813 bool Recursive = false, 4814 bool DefinitionRequired = false); 4815 void InstantiateStaticDataMemberDefinition( 4816 SourceLocation PointOfInstantiation, 4817 VarDecl *Var, 4818 bool Recursive = false, 4819 bool DefinitionRequired = false); 4820 4821 void InstantiateMemInitializers(CXXConstructorDecl *New, 4822 const CXXConstructorDecl *Tmpl, 4823 const MultiLevelTemplateArgumentList &TemplateArgs); 4824 4825 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4826 const MultiLevelTemplateArgumentList &TemplateArgs); 4827 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4828 const MultiLevelTemplateArgumentList &TemplateArgs); 4829 4830 // Objective-C declarations. 4831 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4832 IdentifierInfo *ClassName, 4833 SourceLocation ClassLoc, 4834 IdentifierInfo *SuperName, 4835 SourceLocation SuperLoc, 4836 Decl * const *ProtoRefs, 4837 unsigned NumProtoRefs, 4838 const SourceLocation *ProtoLocs, 4839 SourceLocation EndProtoLoc, 4840 AttributeList *AttrList); 4841 4842 Decl *ActOnCompatiblityAlias( 4843 SourceLocation AtCompatibilityAliasLoc, 4844 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4845 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4846 4847 bool CheckForwardProtocolDeclarationForCircularDependency( 4848 IdentifierInfo *PName, 4849 SourceLocation &PLoc, SourceLocation PrevLoc, 4850 const ObjCList<ObjCProtocolDecl> &PList); 4851 4852 Decl *ActOnStartProtocolInterface( 4853 SourceLocation AtProtoInterfaceLoc, 4854 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4855 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4856 const SourceLocation *ProtoLocs, 4857 SourceLocation EndProtoLoc, 4858 AttributeList *AttrList); 4859 4860 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4861 IdentifierInfo *ClassName, 4862 SourceLocation ClassLoc, 4863 IdentifierInfo *CategoryName, 4864 SourceLocation CategoryLoc, 4865 Decl * const *ProtoRefs, 4866 unsigned NumProtoRefs, 4867 const SourceLocation *ProtoLocs, 4868 SourceLocation EndProtoLoc); 4869 4870 Decl *ActOnStartClassImplementation( 4871 SourceLocation AtClassImplLoc, 4872 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4873 IdentifierInfo *SuperClassname, 4874 SourceLocation SuperClassLoc); 4875 4876 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4877 IdentifierInfo *ClassName, 4878 SourceLocation ClassLoc, 4879 IdentifierInfo *CatName, 4880 SourceLocation CatLoc); 4881 4882 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4883 IdentifierInfo **IdentList, 4884 SourceLocation *IdentLocs, 4885 unsigned NumElts); 4886 4887 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4888 const IdentifierLocPair *IdentList, 4889 unsigned NumElts, 4890 AttributeList *attrList); 4891 4892 void FindProtocolDeclaration(bool WarnOnDeclarations, 4893 const IdentifierLocPair *ProtocolId, 4894 unsigned NumProtocols, 4895 llvm::SmallVectorImpl<Decl *> &Protocols); 4896 4897 /// Ensure attributes are consistent with type. 4898 /// \param [in, out] Attributes The attributes to check; they will 4899 /// be modified to be consistent with \arg PropertyTy. 4900 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4901 SourceLocation Loc, 4902 unsigned &Attributes); 4903 4904 /// Process the specified property declaration and create decls for the 4905 /// setters and getters as needed. 4906 /// \param property The property declaration being processed 4907 /// \param DC The semantic container for the property 4908 /// \param redeclaredProperty Declaration for property if redeclared 4909 /// in class extension. 4910 /// \param lexicalDC Container for redeclaredProperty. 4911 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4912 ObjCContainerDecl *DC, 4913 ObjCPropertyDecl *redeclaredProperty = 0, 4914 ObjCContainerDecl *lexicalDC = 0); 4915 4916 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4917 ObjCPropertyDecl *SuperProperty, 4918 const IdentifierInfo *Name); 4919 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4920 4921 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4922 ObjCMethodDecl *MethodDecl, 4923 bool IsInstance); 4924 4925 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4926 4927 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4928 ObjCInterfaceDecl *ID); 4929 4930 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4931 ObjCProtocolDecl *PDecl); 4932 4933 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4934 Decl **allMethods = 0, unsigned allNum = 0, 4935 Decl **allProperties = 0, unsigned pNum = 0, 4936 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4937 4938 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4939 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4940 Selector GetterSel, Selector SetterSel, 4941 Decl *ClassCategory, 4942 bool *OverridingProperty, 4943 tok::ObjCKeywordKind MethodImplKind, 4944 DeclContext *lexicalDC = 0); 4945 4946 Decl *ActOnPropertyImplDecl(Scope *S, 4947 SourceLocation AtLoc, 4948 SourceLocation PropertyLoc, 4949 bool ImplKind,Decl *ClassImplDecl, 4950 IdentifierInfo *PropertyId, 4951 IdentifierInfo *PropertyIvar, 4952 SourceLocation PropertyIvarLoc); 4953 4954 struct ObjCArgInfo { 4955 IdentifierInfo *Name; 4956 SourceLocation NameLoc; 4957 // The Type is null if no type was specified, and the DeclSpec is invalid 4958 // in this case. 4959 ParsedType Type; 4960 ObjCDeclSpec DeclSpec; 4961 4962 /// ArgAttrs - Attribute list for this argument. 4963 AttributeList *ArgAttrs; 4964 }; 4965 4966 Decl *ActOnMethodDeclaration( 4967 Scope *S, 4968 SourceLocation BeginLoc, // location of the + or -. 4969 SourceLocation EndLoc, // location of the ; or {. 4970 tok::TokenKind MethodType, 4971 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4972 Selector Sel, 4973 // optional arguments. The number of types/arguments is obtained 4974 // from the Sel.getNumArgs(). 4975 ObjCArgInfo *ArgInfo, 4976 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4977 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4978 bool isVariadic, bool MethodDefinition); 4979 4980 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4981 // Will search "local" class/category implementations for a method decl. 4982 // Will also search in class's root looking for instance method. 4983 // Returns 0 if no method is found. 4984 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4985 ObjCInterfaceDecl *CDecl); 4986 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4987 ObjCInterfaceDecl *ClassDecl); 4988 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 4989 const ObjCObjectPointerType *OPT, 4990 bool IsInstance); 4991 4992 ExprResult 4993 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4994 Expr *BaseExpr, 4995 DeclarationName MemberName, 4996 SourceLocation MemberLoc, 4997 SourceLocation SuperLoc, QualType SuperType, 4998 bool Super); 4999 5000 ExprResult 5001 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5002 IdentifierInfo &propertyName, 5003 SourceLocation receiverNameLoc, 5004 SourceLocation propertyNameLoc); 5005 5006 ObjCMethodDecl *tryCaptureObjCSelf(); 5007 5008 /// \brief Describes the kind of message expression indicated by a message 5009 /// send that starts with an identifier. 5010 enum ObjCMessageKind { 5011 /// \brief The message is sent to 'super'. 5012 ObjCSuperMessage, 5013 /// \brief The message is an instance message. 5014 ObjCInstanceMessage, 5015 /// \brief The message is a class message, and the identifier is a type 5016 /// name. 5017 ObjCClassMessage 5018 }; 5019 5020 ObjCMessageKind getObjCMessageKind(Scope *S, 5021 IdentifierInfo *Name, 5022 SourceLocation NameLoc, 5023 bool IsSuper, 5024 bool HasTrailingDot, 5025 ParsedType &ReceiverType); 5026 5027 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5028 Selector Sel, 5029 SourceLocation LBracLoc, 5030 SourceLocation SelectorLoc, 5031 SourceLocation RBracLoc, 5032 MultiExprArg Args); 5033 5034 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5035 QualType ReceiverType, 5036 SourceLocation SuperLoc, 5037 Selector Sel, 5038 ObjCMethodDecl *Method, 5039 SourceLocation LBracLoc, 5040 SourceLocation SelectorLoc, 5041 SourceLocation RBracLoc, 5042 MultiExprArg Args); 5043 5044 ExprResult ActOnClassMessage(Scope *S, 5045 ParsedType Receiver, 5046 Selector Sel, 5047 SourceLocation LBracLoc, 5048 SourceLocation SelectorLoc, 5049 SourceLocation RBracLoc, 5050 MultiExprArg Args); 5051 5052 ExprResult BuildInstanceMessage(Expr *Receiver, 5053 QualType ReceiverType, 5054 SourceLocation SuperLoc, 5055 Selector Sel, 5056 ObjCMethodDecl *Method, 5057 SourceLocation LBracLoc, 5058 SourceLocation SelectorLoc, 5059 SourceLocation RBracLoc, 5060 MultiExprArg Args); 5061 5062 ExprResult ActOnInstanceMessage(Scope *S, 5063 Expr *Receiver, 5064 Selector Sel, 5065 SourceLocation LBracLoc, 5066 SourceLocation SelectorLoc, 5067 SourceLocation RBracLoc, 5068 MultiExprArg Args); 5069 5070 5071 enum PragmaOptionsAlignKind { 5072 POAK_Native, // #pragma options align=native 5073 POAK_Natural, // #pragma options align=natural 5074 POAK_Packed, // #pragma options align=packed 5075 POAK_Power, // #pragma options align=power 5076 POAK_Mac68k, // #pragma options align=mac68k 5077 POAK_Reset // #pragma options align=reset 5078 }; 5079 5080 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5081 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5082 SourceLocation PragmaLoc, 5083 SourceLocation KindLoc); 5084 5085 enum PragmaPackKind { 5086 PPK_Default, // #pragma pack([n]) 5087 PPK_Show, // #pragma pack(show), only supported by MSVC. 5088 PPK_Push, // #pragma pack(push, [identifier], [n]) 5089 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5090 }; 5091 5092 enum PragmaMSStructKind { 5093 PMSST_OFF, // #pragms ms_struct off 5094 PMSST_ON // #pragms ms_struct on 5095 }; 5096 5097 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5098 void ActOnPragmaPack(PragmaPackKind Kind, 5099 IdentifierInfo *Name, 5100 Expr *Alignment, 5101 SourceLocation PragmaLoc, 5102 SourceLocation LParenLoc, 5103 SourceLocation RParenLoc); 5104 5105 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5106 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5107 5108 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5109 void ActOnPragmaUnused(const Token &Identifier, 5110 Scope *curScope, 5111 SourceLocation PragmaLoc); 5112 5113 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5114 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5115 SourceLocation PragmaLoc); 5116 5117 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5118 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5119 5120 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5121 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5122 SourceLocation PragmaLoc, 5123 SourceLocation WeakNameLoc); 5124 5125 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5126 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5127 IdentifierInfo* AliasName, 5128 SourceLocation PragmaLoc, 5129 SourceLocation WeakNameLoc, 5130 SourceLocation AliasNameLoc); 5131 5132 /// ActOnPragmaFPContract - Called on well formed 5133 /// #pragma {STDC,OPENCL} FP_CONTRACT 5134 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5135 5136 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5137 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5138 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5139 5140 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5141 void AddMsStructLayoutForRecord(RecordDecl *RD); 5142 5143 /// FreePackedContext - Deallocate and null out PackContext. 5144 void FreePackedContext(); 5145 5146 /// PushNamespaceVisibilityAttr - Note that we've entered a 5147 /// namespace with a visibility attribute. 5148 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5149 5150 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5151 /// add an appropriate visibility attribute. 5152 void AddPushedVisibilityAttribute(Decl *RD); 5153 5154 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5155 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5156 void PopPragmaVisibility(); 5157 5158 /// FreeVisContext - Deallocate and null out VisContext. 5159 void FreeVisContext(); 5160 5161 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5162 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5163 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5164 5165 /// CastCategory - Get the correct forwarded implicit cast result category 5166 /// from the inner expression. 5167 ExprValueKind CastCategory(Expr *E); 5168 5169 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5170 /// cast. If there is already an implicit cast, merge into the existing one. 5171 /// If isLvalue, the result of the cast is an lvalue. 5172 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5173 ExprValueKind VK = VK_RValue, 5174 const CXXCastPath *BasePath = 0); 5175 5176 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5177 /// to the conversion from scalar type ScalarTy to the Boolean type. 5178 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5179 5180 /// IgnoredValueConversions - Given that an expression's result is 5181 /// syntactically ignored, perform any conversions that are 5182 /// required. 5183 ExprResult IgnoredValueConversions(Expr *E); 5184 5185 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5186 // functions and arrays to their respective pointers (C99 6.3.2.1). 5187 ExprResult UsualUnaryConversions(Expr *E); 5188 5189 // DefaultFunctionArrayConversion - converts functions and arrays 5190 // to their respective pointers (C99 6.3.2.1). 5191 ExprResult DefaultFunctionArrayConversion(Expr *E); 5192 5193 // DefaultFunctionArrayLvalueConversion - converts functions and 5194 // arrays to their respective pointers and performs the 5195 // lvalue-to-rvalue conversion. 5196 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5197 5198 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5199 // the operand. This is DefaultFunctionArrayLvalueConversion, 5200 // except that it assumes the operand isn't of function or array 5201 // type. 5202 ExprResult DefaultLvalueConversion(Expr *E); 5203 5204 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5205 // do not have a prototype. Integer promotions are performed on each 5206 // argument, and arguments that have type float are promoted to double. 5207 ExprResult DefaultArgumentPromotion(Expr *E); 5208 5209 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5210 enum VariadicCallType { 5211 VariadicFunction, 5212 VariadicBlock, 5213 VariadicMethod, 5214 VariadicConstructor, 5215 VariadicDoesNotApply 5216 }; 5217 5218 /// GatherArgumentsForCall - Collector argument expressions for various 5219 /// form of call prototypes. 5220 bool GatherArgumentsForCall(SourceLocation CallLoc, 5221 FunctionDecl *FDecl, 5222 const FunctionProtoType *Proto, 5223 unsigned FirstProtoArg, 5224 Expr **Args, unsigned NumArgs, 5225 llvm::SmallVector<Expr *, 8> &AllArgs, 5226 VariadicCallType CallType = VariadicDoesNotApply); 5227 5228 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5229 // will warn if the resulting type is not a POD type. 5230 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5231 FunctionDecl *FDecl); 5232 5233 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5234 // operands and then handles various conversions that are common to binary 5235 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5236 // routine returns the first non-arithmetic type found. The client is 5237 // responsible for emitting appropriate error diagnostics. 5238 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5239 bool isCompAssign = false); 5240 5241 /// AssignConvertType - All of the 'assignment' semantic checks return this 5242 /// enum to indicate whether the assignment was allowed. These checks are 5243 /// done for simple assignments, as well as initialization, return from 5244 /// function, argument passing, etc. The query is phrased in terms of a 5245 /// source and destination type. 5246 enum AssignConvertType { 5247 /// Compatible - the types are compatible according to the standard. 5248 Compatible, 5249 5250 /// PointerToInt - The assignment converts a pointer to an int, which we 5251 /// accept as an extension. 5252 PointerToInt, 5253 5254 /// IntToPointer - The assignment converts an int to a pointer, which we 5255 /// accept as an extension. 5256 IntToPointer, 5257 5258 /// FunctionVoidPointer - The assignment is between a function pointer and 5259 /// void*, which the standard doesn't allow, but we accept as an extension. 5260 FunctionVoidPointer, 5261 5262 /// IncompatiblePointer - The assignment is between two pointers types that 5263 /// are not compatible, but we accept them as an extension. 5264 IncompatiblePointer, 5265 5266 /// IncompatiblePointer - The assignment is between two pointers types which 5267 /// point to integers which have a different sign, but are otherwise identical. 5268 /// This is a subset of the above, but broken out because it's by far the most 5269 /// common case of incompatible pointers. 5270 IncompatiblePointerSign, 5271 5272 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5273 /// c/v/r qualifiers, which we accept as an extension. 5274 CompatiblePointerDiscardsQualifiers, 5275 5276 /// IncompatiblePointerDiscardsQualifiers - The assignment 5277 /// discards qualifiers that we don't permit to be discarded, 5278 /// like address spaces. 5279 IncompatiblePointerDiscardsQualifiers, 5280 5281 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5282 /// nested pointer types, and the qualifiers other than the first two 5283 /// levels differ e.g. char ** -> const char **, but we accept them as an 5284 /// extension. 5285 IncompatibleNestedPointerQualifiers, 5286 5287 /// IncompatibleVectors - The assignment is between two vector types that 5288 /// have the same size, which we accept as an extension. 5289 IncompatibleVectors, 5290 5291 /// IntToBlockPointer - The assignment converts an int to a block 5292 /// pointer. We disallow this. 5293 IntToBlockPointer, 5294 5295 /// IncompatibleBlockPointer - The assignment is between two block 5296 /// pointers types that are not compatible. 5297 IncompatibleBlockPointer, 5298 5299 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5300 /// id type and something else (that is incompatible with it). For example, 5301 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5302 IncompatibleObjCQualifiedId, 5303 5304 /// Incompatible - We reject this conversion outright, it is invalid to 5305 /// represent it in the AST. 5306 Incompatible 5307 }; 5308 5309 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5310 /// assignment conversion type specified by ConvTy. This returns true if the 5311 /// conversion was invalid or false if the conversion was accepted. 5312 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5313 SourceLocation Loc, 5314 QualType DstType, QualType SrcType, 5315 Expr *SrcExpr, AssignmentAction Action, 5316 bool *Complained = 0); 5317 5318 /// CheckAssignmentConstraints - Perform type checking for assignment, 5319 /// argument passing, variable initialization, and function return values. 5320 /// C99 6.5.16. 5321 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5322 QualType lhs, QualType rhs); 5323 5324 /// Check assignment constraints and prepare for a conversion of the 5325 /// RHS to the LHS type. 5326 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5327 CastKind &Kind); 5328 5329 // CheckSingleAssignmentConstraints - Currently used by 5330 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5331 // this routine performs the default function/array converions. 5332 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5333 ExprResult &rExprRes); 5334 5335 // \brief If the lhs type is a transparent union, check whether we 5336 // can initialize the transparent union with the given expression. 5337 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5338 ExprResult &rExpr); 5339 5340 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5341 5342 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5343 5344 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5345 AssignmentAction Action, 5346 bool AllowExplicit = false); 5347 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5348 AssignmentAction Action, 5349 bool AllowExplicit, 5350 ImplicitConversionSequence& ICS); 5351 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5352 const ImplicitConversionSequence& ICS, 5353 AssignmentAction Action, 5354 bool CStyle = false); 5355 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5356 const StandardConversionSequence& SCS, 5357 AssignmentAction Action, 5358 bool CStyle); 5359 5360 /// the following "Check" methods will return a valid/converted QualType 5361 /// or a null QualType (indicating an error diagnostic was issued). 5362 5363 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5364 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5365 QualType CheckPointerToMemberOperands( // C++ 5.5 5366 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5367 SourceLocation OpLoc, bool isIndirect); 5368 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5369 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5370 bool isDivide); 5371 QualType CheckRemainderOperands( // C99 6.5.5 5372 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5373 QualType CheckAdditionOperands( // C99 6.5.6 5374 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5375 QualType CheckSubtractionOperands( // C99 6.5.6 5376 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5377 QualType CheckShiftOperands( // C99 6.5.7 5378 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5379 bool isCompAssign = false); 5380 QualType CheckCompareOperands( // C99 6.5.8/9 5381 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5382 bool isRelational); 5383 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5384 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5385 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5386 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5387 // CheckAssignmentOperands is used for both simple and compound assignment. 5388 // For simple assignment, pass both expressions and a null converted type. 5389 // For compound assignment, pass both expressions and the converted type. 5390 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5391 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5392 5393 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5394 ExprResult ConvertPropertyForRValue(Expr *E); 5395 5396 QualType CheckConditionalOperands( // C99 6.5.15 5397 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5398 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5399 QualType CXXCheckConditionalOperands( // C++ 5.16 5400 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5401 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5402 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5403 bool *NonStandardCompositeType = 0); 5404 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5405 bool *NonStandardCompositeType = 0) { 5406 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5407 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5408 E1 = Owned(E1Tmp); 5409 E2 = Owned(E2Tmp); 5410 return Composite; 5411 } 5412 5413 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5414 SourceLocation questionLoc); 5415 5416 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5417 SourceLocation QuestionLoc); 5418 5419 /// type checking for vector binary operators. 5420 QualType CheckVectorOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5421 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5422 SourceLocation l, bool isRel); 5423 5424 /// type checking declaration initializers (C99 6.7.8) 5425 bool CheckInitList(const InitializedEntity &Entity, 5426 InitListExpr *&InitList, QualType &DeclType); 5427 bool CheckForConstantInitializer(Expr *e, QualType t); 5428 5429 // type checking C++ declaration initializers (C++ [dcl.init]). 5430 5431 /// ReferenceCompareResult - Expresses the result of comparing two 5432 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5433 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5434 enum ReferenceCompareResult { 5435 /// Ref_Incompatible - The two types are incompatible, so direct 5436 /// reference binding is not possible. 5437 Ref_Incompatible = 0, 5438 /// Ref_Related - The two types are reference-related, which means 5439 /// that their unqualified forms (T1 and T2) are either the same 5440 /// or T1 is a base class of T2. 5441 Ref_Related, 5442 /// Ref_Compatible_With_Added_Qualification - The two types are 5443 /// reference-compatible with added qualification, meaning that 5444 /// they are reference-compatible and the qualifiers on T1 (cv1) 5445 /// are greater than the qualifiers on T2 (cv2). 5446 Ref_Compatible_With_Added_Qualification, 5447 /// Ref_Compatible - The two types are reference-compatible and 5448 /// have equivalent qualifiers (cv1 == cv2). 5449 Ref_Compatible 5450 }; 5451 5452 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5453 QualType T1, QualType T2, 5454 bool &DerivedToBase, 5455 bool &ObjCConversion); 5456 5457 /// CheckCastTypes - Check type constraints for casting between types under 5458 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5459 ExprResult CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *CastExpr, 5460 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 5461 bool FunctionalStyle = false); 5462 5463 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5464 Expr *castExpr, CastKind &castKind, 5465 ExprValueKind &valueKind, CXXCastPath &BasePath); 5466 5467 // CheckVectorCast - check type constraints for vectors. 5468 // Since vectors are an extension, there are no C standard reference for this. 5469 // We allow casting between vectors and integer datatypes of the same size. 5470 // returns true if the cast is invalid 5471 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5472 CastKind &Kind); 5473 5474 // CheckExtVectorCast - check type constraints for extended vectors. 5475 // Since vectors are an extension, there are no C standard reference for this. 5476 // We allow casting between vectors and integer datatypes of the same size, 5477 // or vectors and the element type of that vector. 5478 // returns the cast expr 5479 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5480 CastKind &Kind); 5481 5482 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5483 /// cast under C++ semantics. 5484 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5485 Expr *CastExpr, CastKind &Kind, 5486 CXXCastPath &BasePath, bool FunctionalStyle); 5487 5488 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5489 /// \param Method - May be null. 5490 /// \param [out] ReturnType - The return type of the send. 5491 /// \return true iff there were any incompatible types. 5492 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5493 ObjCMethodDecl *Method, bool isClassMessage, 5494 SourceLocation lbrac, SourceLocation rbrac, 5495 QualType &ReturnType, ExprValueKind &VK); 5496 5497 /// CheckBooleanCondition - Diagnose problems involving the use of 5498 /// the given expression as a boolean condition (e.g. in an if 5499 /// statement). Also performs the standard function and array 5500 /// decays, possibly changing the input variable. 5501 /// 5502 /// \param Loc - A location associated with the condition, e.g. the 5503 /// 'if' keyword. 5504 /// \return true iff there were any errors 5505 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5506 5507 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5508 Expr *SubExpr); 5509 5510 /// DiagnoseAssignmentAsCondition - Given that an expression is 5511 /// being used as a boolean condition, warn if it's an assignment. 5512 void DiagnoseAssignmentAsCondition(Expr *E); 5513 5514 /// \brief Redundant parentheses over an equality comparison can indicate 5515 /// that the user intended an assignment used as condition. 5516 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5517 5518 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5519 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5520 5521 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5522 /// the specified width and sign. If an overflow occurs, detect it and emit 5523 /// the specified diagnostic. 5524 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5525 unsigned NewWidth, bool NewSign, 5526 SourceLocation Loc, unsigned DiagID); 5527 5528 /// Checks that the Objective-C declaration is declared in the global scope. 5529 /// Emits an error and marks the declaration as invalid if it's not declared 5530 /// in the global scope. 5531 bool CheckObjCDeclScope(Decl *D); 5532 5533 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5534 /// and reports the appropriate diagnostics. Returns false on success. 5535 /// Can optionally return the value of the expression. 5536 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5537 5538 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5539 /// the correct width, and that the field type is valid. 5540 /// Returns false on success. 5541 /// Can optionally return whether the bit-field is of width 0 5542 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5543 QualType FieldTy, const Expr *BitWidth, 5544 bool *ZeroWidth = 0); 5545 5546 /// \name Code completion 5547 //@{ 5548 /// \brief Describes the context in which code completion occurs. 5549 enum ParserCompletionContext { 5550 /// \brief Code completion occurs at top-level or namespace context. 5551 PCC_Namespace, 5552 /// \brief Code completion occurs within a class, struct, or union. 5553 PCC_Class, 5554 /// \brief Code completion occurs within an Objective-C interface, protocol, 5555 /// or category. 5556 PCC_ObjCInterface, 5557 /// \brief Code completion occurs within an Objective-C implementation or 5558 /// category implementation 5559 PCC_ObjCImplementation, 5560 /// \brief Code completion occurs within the list of instance variables 5561 /// in an Objective-C interface, protocol, category, or implementation. 5562 PCC_ObjCInstanceVariableList, 5563 /// \brief Code completion occurs following one or more template 5564 /// headers. 5565 PCC_Template, 5566 /// \brief Code completion occurs following one or more template 5567 /// headers within a class. 5568 PCC_MemberTemplate, 5569 /// \brief Code completion occurs within an expression. 5570 PCC_Expression, 5571 /// \brief Code completion occurs within a statement, which may 5572 /// also be an expression or a declaration. 5573 PCC_Statement, 5574 /// \brief Code completion occurs at the beginning of the 5575 /// initialization statement (or expression) in a for loop. 5576 PCC_ForInit, 5577 /// \brief Code completion occurs within the condition of an if, 5578 /// while, switch, or for statement. 5579 PCC_Condition, 5580 /// \brief Code completion occurs within the body of a function on a 5581 /// recovery path, where we do not have a specific handle on our position 5582 /// in the grammar. 5583 PCC_RecoveryInFunction, 5584 /// \brief Code completion occurs where only a type is permitted. 5585 PCC_Type, 5586 /// \brief Code completion occurs in a parenthesized expression, which 5587 /// might also be a type cast. 5588 PCC_ParenthesizedExpression, 5589 /// \brief Code completion occurs within a sequence of declaration 5590 /// specifiers within a function, method, or block. 5591 PCC_LocalDeclarationSpecifiers 5592 }; 5593 5594 void CodeCompleteOrdinaryName(Scope *S, 5595 ParserCompletionContext CompletionContext); 5596 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5597 bool AllowNonIdentifiers, 5598 bool AllowNestedNameSpecifiers); 5599 5600 struct CodeCompleteExpressionData; 5601 void CodeCompleteExpression(Scope *S, 5602 const CodeCompleteExpressionData &Data); 5603 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5604 SourceLocation OpLoc, 5605 bool IsArrow); 5606 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5607 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5608 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5609 void CodeCompleteCase(Scope *S); 5610 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5611 void CodeCompleteInitializer(Scope *S, Decl *D); 5612 void CodeCompleteReturn(Scope *S); 5613 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5614 5615 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5616 bool EnteringContext); 5617 void CodeCompleteUsing(Scope *S); 5618 void CodeCompleteUsingDirective(Scope *S); 5619 void CodeCompleteNamespaceDecl(Scope *S); 5620 void CodeCompleteNamespaceAliasDecl(Scope *S); 5621 void CodeCompleteOperatorName(Scope *S); 5622 void CodeCompleteConstructorInitializer(Decl *Constructor, 5623 CXXCtorInitializer** Initializers, 5624 unsigned NumInitializers); 5625 5626 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5627 bool InInterface); 5628 void CodeCompleteObjCAtVisibility(Scope *S); 5629 void CodeCompleteObjCAtStatement(Scope *S); 5630 void CodeCompleteObjCAtExpression(Scope *S); 5631 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5632 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5633 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5634 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5635 bool IsParameter); 5636 void CodeCompleteObjCMessageReceiver(Scope *S); 5637 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5638 IdentifierInfo **SelIdents, 5639 unsigned NumSelIdents, 5640 bool AtArgumentExpression); 5641 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5642 IdentifierInfo **SelIdents, 5643 unsigned NumSelIdents, 5644 bool AtArgumentExpression, 5645 bool IsSuper = false); 5646 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5647 IdentifierInfo **SelIdents, 5648 unsigned NumSelIdents, 5649 bool AtArgumentExpression, 5650 ObjCInterfaceDecl *Super = 0); 5651 void CodeCompleteObjCForCollection(Scope *S, 5652 DeclGroupPtrTy IterationVar); 5653 void CodeCompleteObjCSelector(Scope *S, 5654 IdentifierInfo **SelIdents, 5655 unsigned NumSelIdents); 5656 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5657 unsigned NumProtocols); 5658 void CodeCompleteObjCProtocolDecl(Scope *S); 5659 void CodeCompleteObjCInterfaceDecl(Scope *S); 5660 void CodeCompleteObjCSuperclass(Scope *S, 5661 IdentifierInfo *ClassName, 5662 SourceLocation ClassNameLoc); 5663 void CodeCompleteObjCImplementationDecl(Scope *S); 5664 void CodeCompleteObjCInterfaceCategory(Scope *S, 5665 IdentifierInfo *ClassName, 5666 SourceLocation ClassNameLoc); 5667 void CodeCompleteObjCImplementationCategory(Scope *S, 5668 IdentifierInfo *ClassName, 5669 SourceLocation ClassNameLoc); 5670 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5671 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5672 IdentifierInfo *PropertyName, 5673 Decl *ObjCImpDecl); 5674 void CodeCompleteObjCMethodDecl(Scope *S, 5675 bool IsInstanceMethod, 5676 ParsedType ReturnType, 5677 Decl *IDecl); 5678 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5679 bool IsInstanceMethod, 5680 bool AtParameterName, 5681 ParsedType ReturnType, 5682 IdentifierInfo **SelIdents, 5683 unsigned NumSelIdents); 5684 void CodeCompletePreprocessorDirective(bool InConditional); 5685 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5686 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5687 void CodeCompletePreprocessorExpression(); 5688 void CodeCompletePreprocessorMacroArgument(Scope *S, 5689 IdentifierInfo *Macro, 5690 MacroInfo *MacroInfo, 5691 unsigned Argument); 5692 void CodeCompleteNaturalLanguage(); 5693 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5694 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5695 //@} 5696 5697 void PrintStats() const {} 5698 5699 //===--------------------------------------------------------------------===// 5700 // Extra semantic analysis beyond the C type system 5701 5702public: 5703 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5704 unsigned ByteNo) const; 5705 5706private: 5707 void CheckArrayAccess(const Expr *E); 5708 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5709 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5710 5711 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5712 bool CheckObjCString(Expr *Arg); 5713 5714 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5715 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5716 5717 bool SemaBuiltinVAStart(CallExpr *TheCall); 5718 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5719 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5720 5721public: 5722 // Used by C++ template instantiation. 5723 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5724 5725private: 5726 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5727 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5728 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5729 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5730 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5731 llvm::APSInt &Result); 5732 5733 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5734 bool HasVAListArg, unsigned format_idx, 5735 unsigned firstDataArg, bool isPrintf); 5736 5737 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5738 const CallExpr *TheCall, bool HasVAListArg, 5739 unsigned format_idx, unsigned firstDataArg, 5740 bool isPrintf); 5741 5742 void CheckNonNullArguments(const NonNullAttr *NonNull, 5743 const Expr * const *ExprArgs, 5744 SourceLocation CallSiteLoc); 5745 5746 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5747 unsigned format_idx, unsigned firstDataArg, 5748 bool isPrintf); 5749 5750 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5751 const IdentifierInfo *FnName); 5752 5753 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5754 SourceLocation ReturnLoc); 5755 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5756 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5757 5758 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5759 Expr *Init); 5760 5761 /// \brief The parser's current scope. 5762 /// 5763 /// The parser maintains this state here. 5764 Scope *CurScope; 5765 5766protected: 5767 friend class Parser; 5768 friend class InitializationSequence; 5769 5770 /// \brief Retrieve the parser's current scope. 5771 Scope *getCurScope() const { return CurScope; } 5772}; 5773 5774/// \brief RAII object that enters a new expression evaluation context. 5775class EnterExpressionEvaluationContext { 5776 Sema &Actions; 5777 5778public: 5779 EnterExpressionEvaluationContext(Sema &Actions, 5780 Sema::ExpressionEvaluationContext NewContext) 5781 : Actions(Actions) { 5782 Actions.PushExpressionEvaluationContext(NewContext); 5783 } 5784 5785 ~EnterExpressionEvaluationContext() { 5786 Actions.PopExpressionEvaluationContext(); 5787 } 5788}; 5789 5790} // end namespace clang 5791 5792#endif 5793