Sema.h revision 925910d488051cbd4e38f350c1e9d69c473f09a0
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/OperationKinds.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/Basic/Specifiers.h" 27#include "clang/Basic/TemplateKinds.h" 28#include "clang/Basic/TypeTraits.h" 29#include "llvm/ADT/OwningPtr.h" 30#include "llvm/ADT/SmallPtrSet.h" 31#include "llvm/ADT/SmallVector.h" 32#include <deque> 33#include <string> 34 35namespace llvm { 36 class APSInt; 37 template <typename ValueT> struct DenseMapInfo; 38 template <typename ValueT, typename ValueInfoT> class DenseSet; 39} 40 41namespace clang { 42 class ADLResult; 43 class ASTConsumer; 44 class ASTContext; 45 class ArrayType; 46 class AttributeList; 47 class BlockDecl; 48 class CXXBasePath; 49 class CXXBasePaths; 50 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 51 class CXXConstructorDecl; 52 class CXXConversionDecl; 53 class CXXDestructorDecl; 54 class CXXFieldCollector; 55 class CXXMemberCallExpr; 56 class CXXMethodDecl; 57 class CXXScopeSpec; 58 class CXXTemporary; 59 class CXXTryStmt; 60 class CallExpr; 61 class ClassTemplateDecl; 62 class ClassTemplatePartialSpecializationDecl; 63 class ClassTemplateSpecializationDecl; 64 class CodeCompleteConsumer; 65 class CodeCompletionResult; 66 class Decl; 67 class DeclAccessPair; 68 class DeclContext; 69 class DeclRefExpr; 70 class DeclaratorDecl; 71 class DeducedTemplateArgument; 72 class DependentDiagnostic; 73 class DesignatedInitExpr; 74 class Designation; 75 class EnumConstantDecl; 76 class Expr; 77 class ExtVectorType; 78 class ExternalSemaSource; 79 class FormatAttr; 80 class FriendDecl; 81 class FunctionDecl; 82 class FunctionProtoType; 83 class FunctionTemplateDecl; 84 class ImplicitConversionSequence; 85 class InitListExpr; 86 class InitializationKind; 87 class InitializationSequence; 88 class InitializedEntity; 89 class IntegerLiteral; 90 class LabelStmt; 91 class LangOptions; 92 class LocalInstantiationScope; 93 class LookupResult; 94 class MacroInfo; 95 class MultiLevelTemplateArgumentList; 96 class NamedDecl; 97 class NonNullAttr; 98 class ObjCCategoryDecl; 99 class ObjCCategoryImplDecl; 100 class ObjCCompatibleAliasDecl; 101 class ObjCContainerDecl; 102 class ObjCImplDecl; 103 class ObjCImplementationDecl; 104 class ObjCInterfaceDecl; 105 class ObjCIvarDecl; 106 template <class T> class ObjCList; 107 class ObjCMethodDecl; 108 class ObjCPropertyDecl; 109 class ObjCProtocolDecl; 110 class OverloadCandidateSet; 111 class ParenListExpr; 112 class ParmVarDecl; 113 class Preprocessor; 114 class PseudoDestructorTypeStorage; 115 class QualType; 116 class StandardConversionSequence; 117 class Stmt; 118 class StringLiteral; 119 class SwitchStmt; 120 class TargetAttributesSema; 121 class TemplateArgument; 122 class TemplateArgumentList; 123 class TemplateArgumentLoc; 124 class TemplateDecl; 125 class TemplateParameterList; 126 class TemplatePartialOrderingContext; 127 class TemplateTemplateParmDecl; 128 class Token; 129 class TypedefDecl; 130 class UnqualifiedId; 131 class UnresolvedLookupExpr; 132 class UnresolvedMemberExpr; 133 class UnresolvedSetImpl; 134 class UnresolvedSetIterator; 135 class UsingDecl; 136 class UsingShadowDecl; 137 class ValueDecl; 138 class VarDecl; 139 class VisibilityAttr; 140 class VisibleDeclConsumer; 141 class IndirectFieldDecl; 142 143namespace sema { 144 class AccessedEntity; 145 class BlockScopeInfo; 146 class DelayedDiagnostic; 147 class FunctionScopeInfo; 148 class TemplateDeductionInfo; 149} 150 151/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 152/// parsing. 153/// 154/// LocInfoType is a "transient" type, only needed for passing to/from Parser 155/// and Sema, when we want to preserve type source info for a parsed type. 156/// It will not participate in the type system semantics in any way. 157class LocInfoType : public Type { 158 enum { 159 // The last number that can fit in Type's TC. 160 // Avoids conflict with an existing Type class. 161 LocInfo = Type::TypeLast + 1 162 }; 163 164 TypeSourceInfo *DeclInfo; 165 166 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 167 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 168 ty->isVariablyModifiedType(), 169 ty->containsUnexpandedParameterPack()), 170 DeclInfo(TInfo) { 171 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 172 } 173 friend class Sema; 174 175public: 176 QualType getType() const { return getCanonicalTypeInternal(); } 177 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 178 179 void getAsStringInternal(std::string &Str, 180 const PrintingPolicy &Policy) const; 181 182 static bool classof(const Type *T) { 183 return T->getTypeClass() == (TypeClass)LocInfo; 184 } 185 static bool classof(const LocInfoType *) { return true; } 186}; 187 188// FIXME: No way to easily map from TemplateTypeParmTypes to 189// TemplateTypeParmDecls, so we have this horrible PointerUnion. 190typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 191 SourceLocation> UnexpandedParameterPack; 192 193/// Sema - This implements semantic analysis and AST building for C. 194class Sema { 195 Sema(const Sema&); // DO NOT IMPLEMENT 196 void operator=(const Sema&); // DO NOT IMPLEMENT 197 mutable const TargetAttributesSema* TheTargetAttributesSema; 198public: 199 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 200 typedef OpaquePtr<TemplateName> TemplateTy; 201 typedef OpaquePtr<QualType> TypeTy; 202 typedef Attr AttrTy; 203 typedef CXXBaseSpecifier BaseTy; 204 typedef CXXBaseOrMemberInitializer MemInitTy; 205 typedef Expr ExprTy; 206 typedef Stmt StmtTy; 207 typedef TemplateParameterList TemplateParamsTy; 208 typedef NestedNameSpecifier CXXScopeTy; 209 210 const LangOptions &LangOpts; 211 Preprocessor &PP; 212 ASTContext &Context; 213 ASTConsumer &Consumer; 214 Diagnostic &Diags; 215 SourceManager &SourceMgr; 216 217 /// \brief Source of additional semantic information. 218 ExternalSemaSource *ExternalSource; 219 220 /// \brief Code-completion consumer. 221 CodeCompleteConsumer *CodeCompleter; 222 223 /// CurContext - This is the current declaration context of parsing. 224 DeclContext *CurContext; 225 226 /// VAListTagName - The declaration name corresponding to __va_list_tag. 227 /// This is used as part of a hack to omit that class from ADL results. 228 DeclarationName VAListTagName; 229 230 /// A RAII object to temporarily push a declaration context. 231 class ContextRAII { 232 private: 233 Sema &S; 234 DeclContext *SavedContext; 235 236 public: 237 ContextRAII(Sema &S, DeclContext *ContextToPush) 238 : S(S), SavedContext(S.CurContext) { 239 assert(ContextToPush && "pushing null context"); 240 S.CurContext = ContextToPush; 241 } 242 243 void pop() { 244 if (!SavedContext) return; 245 S.CurContext = SavedContext; 246 SavedContext = 0; 247 } 248 249 ~ContextRAII() { 250 pop(); 251 } 252 }; 253 254 /// PackContext - Manages the stack for #pragma pack. An alignment 255 /// of 0 indicates default alignment. 256 void *PackContext; // Really a "PragmaPackStack*" 257 258 /// VisContext - Manages the stack for #pragma GCC visibility. 259 void *VisContext; // Really a "PragmaVisStack*" 260 261 /// \brief Stack containing information about each of the nested 262 /// function, block, and method scopes that are currently active. 263 /// 264 /// This array is never empty. Clients should ignore the first 265 /// element, which is used to cache a single FunctionScopeInfo 266 /// that's used to parse every top-level function. 267 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 268 269 /// ExprTemporaries - This is the stack of temporaries that are created by 270 /// the current full expression. 271 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 272 273 /// ExtVectorDecls - This is a list all the extended vector types. This allows 274 /// us to associate a raw vector type with one of the ext_vector type names. 275 /// This is only necessary for issuing pretty diagnostics. 276 llvm::SmallVector<TypedefDecl*, 24> ExtVectorDecls; 277 278 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 279 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 280 281 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 282 283 /// PureVirtualClassDiagSet - a set of class declarations which we have 284 /// emitted a list of pure virtual functions. Used to prevent emitting the 285 /// same list more than once. 286 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 287 288 /// \brief A mapping from external names to the most recent 289 /// locally-scoped external declaration with that name. 290 /// 291 /// This map contains external declarations introduced in local 292 /// scoped, e.g., 293 /// 294 /// \code 295 /// void f() { 296 /// void foo(int, int); 297 /// } 298 /// \endcode 299 /// 300 /// Here, the name "foo" will be associated with the declaration on 301 /// "foo" within f. This name is not visible outside of 302 /// "f". However, we still find it in two cases: 303 /// 304 /// - If we are declaring another external with the name "foo", we 305 /// can find "foo" as a previous declaration, so that the types 306 /// of this external declaration can be checked for 307 /// compatibility. 308 /// 309 /// - If we would implicitly declare "foo" (e.g., due to a call to 310 /// "foo" in C when no prototype or definition is visible), then 311 /// we find this declaration of "foo" and complain that it is 312 /// not visible. 313 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 314 315 /// \brief All the tentative definitions encountered in the TU. 316 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 317 318 /// \brief The set of file scoped decls seen so far that have not been used 319 /// and must warn if not used. Only contains the first declaration. 320 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 321 322 /// \brief The stack of diagnostics that were delayed due to being 323 /// produced during the parsing of a declaration. 324 llvm::SmallVector<sema::DelayedDiagnostic, 0> DelayedDiagnostics; 325 326 /// \brief The depth of the current ParsingDeclaration stack. 327 /// If nonzero, we are currently parsing a declaration (and 328 /// hence should delay deprecation warnings). 329 unsigned ParsingDeclDepth; 330 331 /// WeakUndeclaredIdentifiers - Identifiers contained in 332 /// #pragma weak before declared. rare. may alias another 333 /// identifier, declared or undeclared 334 class WeakInfo { 335 IdentifierInfo *alias; // alias (optional) 336 SourceLocation loc; // for diagnostics 337 bool used; // identifier later declared? 338 public: 339 WeakInfo() 340 : alias(0), loc(SourceLocation()), used(false) {} 341 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 342 : alias(Alias), loc(Loc), used(false) {} 343 inline IdentifierInfo * getAlias() const { return alias; } 344 inline SourceLocation getLocation() const { return loc; } 345 void setUsed(bool Used=true) { used = Used; } 346 inline bool getUsed() { return used; } 347 bool operator==(WeakInfo RHS) const { 348 return alias == RHS.getAlias() && loc == RHS.getLocation(); 349 } 350 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 351 }; 352 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 353 354 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 355 /// #pragma weak during processing of other Decls. 356 /// I couldn't figure out a clean way to generate these in-line, so 357 /// we store them here and handle separately -- which is a hack. 358 /// It would be best to refactor this. 359 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 360 361 IdentifierResolver IdResolver; 362 363 /// Translation Unit Scope - useful to Objective-C actions that need 364 /// to lookup file scope declarations in the "ordinary" C decl namespace. 365 /// For example, user-defined classes, built-in "id" type, etc. 366 Scope *TUScope; 367 368 /// \brief The C++ "std" namespace, where the standard library resides. 369 LazyDeclPtr StdNamespace; 370 371 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 372 /// standard library. 373 LazyDeclPtr StdBadAlloc; 374 375 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 376 RecordDecl *CXXTypeInfoDecl; 377 378 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 379 RecordDecl *MSVCGuidDecl; 380 381 /// A flag to remember whether the implicit forms of operator new and delete 382 /// have been declared. 383 bool GlobalNewDeleteDeclared; 384 385 /// \brief The set of declarations that have been referenced within 386 /// a potentially evaluated expression. 387 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 388 PotentiallyReferencedDecls; 389 390 /// \brief A set of diagnostics that may be emitted. 391 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 392 PotentiallyEmittedDiagnostics; 393 394 /// \brief Describes how the expressions currently being parsed are 395 /// evaluated at run-time, if at all. 396 enum ExpressionEvaluationContext { 397 /// \brief The current expression and its subexpressions occur within an 398 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 399 /// or the subexpression of \c sizeof, where the type or the value of the 400 /// expression may be significant but no code will be generated to evaluate 401 /// the value of the expression at run time. 402 Unevaluated, 403 404 /// \brief The current expression is potentially evaluated at run time, 405 /// which means that code may be generated to evaluate the value of the 406 /// expression at run time. 407 PotentiallyEvaluated, 408 409 /// \brief The current expression may be potentially evaluated or it may 410 /// be unevaluated, but it is impossible to tell from the lexical context. 411 /// This evaluation context is used primary for the operand of the C++ 412 /// \c typeid expression, whose argument is potentially evaluated only when 413 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 414 PotentiallyPotentiallyEvaluated, 415 416 /// \brief The current expression is potentially evaluated, but any 417 /// declarations referenced inside that expression are only used if 418 /// in fact the current expression is used. 419 /// 420 /// This value is used when parsing default function arguments, for which 421 /// we would like to provide diagnostics (e.g., passing non-POD arguments 422 /// through varargs) but do not want to mark declarations as "referenced" 423 /// until the default argument is used. 424 PotentiallyEvaluatedIfUsed 425 }; 426 427 /// \brief Data structure used to record current or nested 428 /// expression evaluation contexts. 429 struct ExpressionEvaluationContextRecord { 430 /// \brief The expression evaluation context. 431 ExpressionEvaluationContext Context; 432 433 /// \brief The number of temporaries that were active when we 434 /// entered this expression evaluation context. 435 unsigned NumTemporaries; 436 437 /// \brief The set of declarations referenced within a 438 /// potentially potentially-evaluated context. 439 /// 440 /// When leaving a potentially potentially-evaluated context, each 441 /// of these elements will be as referenced if the corresponding 442 /// potentially potentially evaluated expression is potentially 443 /// evaluated. 444 PotentiallyReferencedDecls *PotentiallyReferenced; 445 446 /// \brief The set of diagnostics to emit should this potentially 447 /// potentially-evaluated context become evaluated. 448 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 449 450 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 451 unsigned NumTemporaries) 452 : Context(Context), NumTemporaries(NumTemporaries), 453 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 454 455 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 456 if (!PotentiallyReferenced) 457 PotentiallyReferenced = new PotentiallyReferencedDecls; 458 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 459 } 460 461 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 462 if (!PotentiallyDiagnosed) 463 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 464 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 465 } 466 467 void Destroy() { 468 delete PotentiallyReferenced; 469 delete PotentiallyDiagnosed; 470 PotentiallyReferenced = 0; 471 PotentiallyDiagnosed = 0; 472 } 473 }; 474 475 /// A stack of expression evaluation contexts. 476 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 477 478 /// \brief Whether the code handled by Sema should be considered a 479 /// complete translation unit or not. 480 /// 481 /// When true (which is generally the case), Sema will perform 482 /// end-of-translation-unit semantic tasks (such as creating 483 /// initializers for tentative definitions in C) once parsing has 484 /// completed. This flag will be false when building PCH files, 485 /// since a PCH file is by definition not a complete translation 486 /// unit. 487 bool CompleteTranslationUnit; 488 489 llvm::BumpPtrAllocator BumpAlloc; 490 491 /// \brief The number of SFINAE diagnostics that have been trapped. 492 unsigned NumSFINAEErrors; 493 494 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 495 UnparsedDefaultArgInstantiationsMap; 496 497 /// \brief A mapping from parameters with unparsed default arguments to the 498 /// set of instantiations of each parameter. 499 /// 500 /// This mapping is a temporary data structure used when parsing 501 /// nested class templates or nested classes of class templates, 502 /// where we might end up instantiating an inner class before the 503 /// default arguments of its methods have been parsed. 504 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 505 506 // Contains the locations of the beginning of unparsed default 507 // argument locations. 508 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 509 510 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 511 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 512 513 /// Method Pool - allows efficient lookup when typechecking messages to "id". 514 /// We need to maintain a list, since selectors can have differing signatures 515 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 516 /// of selectors are "overloaded"). 517 GlobalMethodPool MethodPool; 518 519 /// Method selectors used in a @selector expression. Used for implementation 520 /// of -Wselector. 521 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 522 523 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 524 525 /// Private Helper predicate to check for 'self'. 526 bool isSelfExpr(Expr *RExpr); 527public: 528 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 529 bool CompleteTranslationUnit = true, 530 CodeCompleteConsumer *CompletionConsumer = 0); 531 ~Sema(); 532 533 /// \brief Perform initialization that occurs after the parser has been 534 /// initialized but before it parses anything. 535 void Initialize(); 536 537 const LangOptions &getLangOptions() const { return LangOpts; } 538 Diagnostic &getDiagnostics() const { return Diags; } 539 SourceManager &getSourceManager() const { return SourceMgr; } 540 const TargetAttributesSema &getTargetAttributesSema() const; 541 Preprocessor &getPreprocessor() const { return PP; } 542 ASTContext &getASTContext() const { return Context; } 543 ASTConsumer &getASTConsumer() const { return Consumer; } 544 545 /// \brief Helper class that creates diagnostics with optional 546 /// template instantiation stacks. 547 /// 548 /// This class provides a wrapper around the basic DiagnosticBuilder 549 /// class that emits diagnostics. SemaDiagnosticBuilder is 550 /// responsible for emitting the diagnostic (as DiagnosticBuilder 551 /// does) and, if the diagnostic comes from inside a template 552 /// instantiation, printing the template instantiation stack as 553 /// well. 554 class SemaDiagnosticBuilder : public DiagnosticBuilder { 555 Sema &SemaRef; 556 unsigned DiagID; 557 558 public: 559 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 560 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 561 562 explicit SemaDiagnosticBuilder(Sema &SemaRef) 563 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 564 565 ~SemaDiagnosticBuilder(); 566 }; 567 568 /// \brief Emit a diagnostic. 569 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 570 571 /// \brief Emit a partial diagnostic. 572 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 573 574 /// \brief Build a partial diagnostic. 575 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 576 577 ExprResult Owned(Expr* E) { return E; } 578 ExprResult Owned(ExprResult R) { return R; } 579 StmtResult Owned(Stmt* S) { return S; } 580 581 void ActOnEndOfTranslationUnit(); 582 583 Scope *getScopeForContext(DeclContext *Ctx); 584 585 void PushFunctionScope(); 586 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 587 void PopFunctionOrBlockScope(); 588 589 sema::FunctionScopeInfo *getCurFunction() const { 590 return FunctionScopes.back(); 591 } 592 593 bool hasAnyErrorsInThisFunction() const; 594 595 /// \brief Retrieve the current block, if any. 596 sema::BlockScopeInfo *getCurBlock(); 597 598 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 599 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 600 601 //===--------------------------------------------------------------------===// 602 // Type Analysis / Processing: SemaType.cpp. 603 // 604 605 QualType adjustParameterType(QualType T); 606 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 607 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 608 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 609 } 610 QualType BuildPointerType(QualType T, 611 SourceLocation Loc, DeclarationName Entity); 612 QualType BuildReferenceType(QualType T, bool LValueRef, 613 SourceLocation Loc, DeclarationName Entity); 614 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 615 Expr *ArraySize, unsigned Quals, 616 SourceRange Brackets, DeclarationName Entity); 617 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 618 SourceLocation AttrLoc); 619 QualType BuildFunctionType(QualType T, 620 QualType *ParamTypes, unsigned NumParamTypes, 621 bool Variadic, unsigned Quals, 622 SourceLocation Loc, DeclarationName Entity, 623 FunctionType::ExtInfo Info); 624 QualType BuildMemberPointerType(QualType T, QualType Class, 625 SourceLocation Loc, 626 DeclarationName Entity); 627 QualType BuildBlockPointerType(QualType T, 628 SourceLocation Loc, DeclarationName Entity); 629 QualType BuildParenType(QualType T); 630 631 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 632 TagDecl **OwnedDecl = 0); 633 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 634 TypeSourceInfo *ReturnTypeInfo); 635 /// \brief Package the given type and TSI into a ParsedType. 636 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 637 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 638 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 639 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 640 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 641 bool CheckDistantExceptionSpec(QualType T); 642 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 643 bool CheckEquivalentExceptionSpec( 644 const FunctionProtoType *Old, SourceLocation OldLoc, 645 const FunctionProtoType *New, SourceLocation NewLoc); 646 bool CheckEquivalentExceptionSpec( 647 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 648 const FunctionProtoType *Old, SourceLocation OldLoc, 649 const FunctionProtoType *New, SourceLocation NewLoc, 650 bool *MissingExceptionSpecification = 0, 651 bool *MissingEmptyExceptionSpecification = 0); 652 bool CheckExceptionSpecSubset( 653 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 654 const FunctionProtoType *Superset, SourceLocation SuperLoc, 655 const FunctionProtoType *Subset, SourceLocation SubLoc); 656 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 657 const FunctionProtoType *Target, SourceLocation TargetLoc, 658 const FunctionProtoType *Source, SourceLocation SourceLoc); 659 660 TypeResult ActOnTypeName(Scope *S, Declarator &D); 661 662 bool RequireCompleteType(SourceLocation Loc, QualType T, 663 const PartialDiagnostic &PD, 664 std::pair<SourceLocation, PartialDiagnostic> Note); 665 bool RequireCompleteType(SourceLocation Loc, QualType T, 666 const PartialDiagnostic &PD); 667 bool RequireCompleteType(SourceLocation Loc, QualType T, 668 unsigned DiagID); 669 670 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 671 const CXXScopeSpec &SS, QualType T); 672 673 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 674 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 675 676 //===--------------------------------------------------------------------===// 677 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 678 // 679 680 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 681 682 void DiagnoseUseOfUnimplementedSelectors(); 683 684 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 685 Scope *S, CXXScopeSpec *SS = 0, 686 bool isClassName = false, 687 ParsedType ObjectType = ParsedType()); 688 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 689 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 690 SourceLocation IILoc, 691 Scope *S, 692 CXXScopeSpec *SS, 693 ParsedType &SuggestedType); 694 695 Decl *ActOnDeclarator(Scope *S, Declarator &D); 696 697 Decl *HandleDeclarator(Scope *S, Declarator &D, 698 MultiTemplateParamsArg TemplateParameterLists, 699 bool IsFunctionDefinition); 700 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 701 const LookupResult &Previous, 702 Scope *S); 703 void DiagnoseFunctionSpecifiers(Declarator& D); 704 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 705 void CheckShadow(Scope *S, VarDecl *D); 706 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 707 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 708 QualType R, TypeSourceInfo *TInfo, 709 LookupResult &Previous, bool &Redeclaration); 710 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 711 QualType R, TypeSourceInfo *TInfo, 712 LookupResult &Previous, 713 MultiTemplateParamsArg TemplateParamLists, 714 bool &Redeclaration); 715 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 716 bool &Redeclaration); 717 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 718 QualType R, TypeSourceInfo *TInfo, 719 LookupResult &Previous, 720 MultiTemplateParamsArg TemplateParamLists, 721 bool IsFunctionDefinition, 722 bool &Redeclaration); 723 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 724 void CheckFunctionDeclaration(Scope *S, 725 FunctionDecl *NewFD, LookupResult &Previous, 726 bool IsExplicitSpecialization, 727 bool &Redeclaration, 728 bool &OverloadableAttrRequired); 729 void CheckMain(FunctionDecl *FD); 730 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 731 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 732 SourceLocation Loc, 733 QualType T); 734 ParmVarDecl *CheckParameter(DeclContext *DC, 735 TypeSourceInfo *TSInfo, QualType T, 736 IdentifierInfo *Name, 737 SourceLocation NameLoc, 738 StorageClass SC, 739 StorageClass SCAsWritten); 740 void ActOnParamDefaultArgument(Decl *param, 741 SourceLocation EqualLoc, 742 Expr *defarg); 743 void ActOnParamUnparsedDefaultArgument(Decl *param, 744 SourceLocation EqualLoc, 745 SourceLocation ArgLoc); 746 void ActOnParamDefaultArgumentError(Decl *param); 747 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 748 SourceLocation EqualLoc); 749 750 void AddInitializerToDecl(Decl *dcl, Expr *init); 751 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit); 752 void ActOnUninitializedDecl(Decl *dcl, bool TypeContainsUndeducedAuto); 753 void ActOnInitializerError(Decl *Dcl); 754 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 755 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 756 Decl **Group, 757 unsigned NumDecls); 758 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 759 SourceLocation LocAfterDecls); 760 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 761 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 762 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 763 764 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 765 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 766 767 /// \brief Diagnose any unused parameters in the given sequence of 768 /// ParmVarDecl pointers. 769 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 770 ParmVarDecl * const *End); 771 772 /// \brief Diagnose whether the size of parameters or return value of a 773 /// function or obj-c method definition is pass-by-value and larger than a 774 /// specified threshold. 775 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 776 ParmVarDecl * const *End, 777 QualType ReturnTy, 778 NamedDecl *D); 779 780 void DiagnoseInvalidJumps(Stmt *Body); 781 Decl *ActOnFileScopeAsmDecl(SourceLocation Loc, Expr *expr); 782 783 /// Scope actions. 784 void ActOnPopScope(SourceLocation Loc, Scope *S); 785 void ActOnTranslationUnitScope(Scope *S); 786 787 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 788 /// no declarator (e.g. "struct foo;") is parsed. 789 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 790 DeclSpec &DS); 791 792 StmtResult ActOnVlaStmt(const DeclSpec &DS); 793 794 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 795 AccessSpecifier AS, 796 RecordDecl *Record); 797 798 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 799 RecordDecl *Record); 800 801 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 802 TagTypeKind NewTag, 803 SourceLocation NewTagLoc, 804 const IdentifierInfo &Name); 805 806 enum TagUseKind { 807 TUK_Reference, // Reference to a tag: 'struct foo *X;' 808 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 809 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 810 TUK_Friend // Friend declaration: 'friend struct foo;' 811 }; 812 813 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 814 SourceLocation KWLoc, CXXScopeSpec &SS, 815 IdentifierInfo *Name, SourceLocation NameLoc, 816 AttributeList *Attr, AccessSpecifier AS, 817 MultiTemplateParamsArg TemplateParameterLists, 818 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 819 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 820 821 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 822 unsigned TagSpec, SourceLocation TagLoc, 823 CXXScopeSpec &SS, 824 IdentifierInfo *Name, SourceLocation NameLoc, 825 AttributeList *Attr, 826 MultiTemplateParamsArg TempParamLists); 827 828 TypeResult ActOnDependentTag(Scope *S, 829 unsigned TagSpec, 830 TagUseKind TUK, 831 const CXXScopeSpec &SS, 832 IdentifierInfo *Name, 833 SourceLocation TagLoc, 834 SourceLocation NameLoc); 835 836 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 837 IdentifierInfo *ClassName, 838 llvm::SmallVectorImpl<Decl *> &Decls); 839 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 840 Declarator &D, Expr *BitfieldWidth); 841 842 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 843 Declarator &D, Expr *BitfieldWidth, 844 AccessSpecifier AS); 845 846 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 847 TypeSourceInfo *TInfo, 848 RecordDecl *Record, SourceLocation Loc, 849 bool Mutable, Expr *BitfieldWidth, 850 SourceLocation TSSL, 851 AccessSpecifier AS, NamedDecl *PrevDecl, 852 Declarator *D = 0); 853 854 enum CXXSpecialMember { 855 CXXInvalid = -1, 856 CXXConstructor = 0, 857 CXXCopyConstructor = 1, 858 CXXCopyAssignment = 2, 859 CXXDestructor = 3 860 }; 861 bool CheckNontrivialField(FieldDecl *FD); 862 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 863 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 864 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 865 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 866 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 867 Declarator &D, Expr *BitfieldWidth, 868 tok::ObjCKeywordKind visibility); 869 870 // This is used for both record definitions and ObjC interface declarations. 871 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 872 Decl **Fields, unsigned NumFields, 873 SourceLocation LBrac, SourceLocation RBrac, 874 AttributeList *AttrList); 875 876 /// ActOnTagStartDefinition - Invoked when we have entered the 877 /// scope of a tag's definition (e.g., for an enumeration, class, 878 /// struct, or union). 879 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 880 881 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 882 /// C++ record definition's base-specifiers clause and are starting its 883 /// member declarations. 884 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 885 SourceLocation LBraceLoc); 886 887 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 888 /// the definition of a tag (enumeration, class, struct, or union). 889 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 890 SourceLocation RBraceLoc); 891 892 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 893 /// error parsing the definition of a tag. 894 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 895 896 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 897 EnumConstantDecl *LastEnumConst, 898 SourceLocation IdLoc, 899 IdentifierInfo *Id, 900 Expr *val); 901 902 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 903 SourceLocation IdLoc, IdentifierInfo *Id, 904 AttributeList *Attrs, 905 SourceLocation EqualLoc, Expr *Val); 906 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 907 SourceLocation RBraceLoc, Decl *EnumDecl, 908 Decl **Elements, unsigned NumElements, 909 Scope *S, AttributeList *Attr); 910 911 DeclContext *getContainingDC(DeclContext *DC); 912 913 /// Set the current declaration context until it gets popped. 914 void PushDeclContext(Scope *S, DeclContext *DC); 915 void PopDeclContext(); 916 917 /// EnterDeclaratorContext - Used when we must lookup names in the context 918 /// of a declarator's nested name specifier. 919 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 920 void ExitDeclaratorContext(Scope *S); 921 922 DeclContext *getFunctionLevelDeclContext(); 923 924 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 925 /// to the function decl for the function being parsed. If we're currently 926 /// in a 'block', this returns the containing context. 927 FunctionDecl *getCurFunctionDecl(); 928 929 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 930 /// the method decl for the method being parsed. If we're currently 931 /// in a 'block', this returns the containing context. 932 ObjCMethodDecl *getCurMethodDecl(); 933 934 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 935 /// or C function we're in, otherwise return null. If we're currently 936 /// in a 'block', this returns the containing context. 937 NamedDecl *getCurFunctionOrMethodDecl(); 938 939 /// Add this decl to the scope shadowed decl chains. 940 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 941 942 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 943 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 944 /// true if 'D' belongs to the given declaration context. 945 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0); 946 947 /// Finds the scope corresponding to the given decl context, if it 948 /// happens to be an enclosing scope. Otherwise return NULL. 949 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 950 951 /// Subroutines of ActOnDeclarator(). 952 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 953 TypeSourceInfo *TInfo); 954 void MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls); 955 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 956 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 957 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 958 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 959 960 // AssignmentAction - This is used by all the assignment diagnostic functions 961 // to represent what is actually causing the operation 962 enum AssignmentAction { 963 AA_Assigning, 964 AA_Passing, 965 AA_Returning, 966 AA_Converting, 967 AA_Initializing, 968 AA_Sending, 969 AA_Casting 970 }; 971 972 /// C++ Overloading. 973 enum OverloadKind { 974 /// This is a legitimate overload: the existing declarations are 975 /// functions or function templates with different signatures. 976 Ovl_Overload, 977 978 /// This is not an overload because the signature exactly matches 979 /// an existing declaration. 980 Ovl_Match, 981 982 /// This is not an overload because the lookup results contain a 983 /// non-function. 984 Ovl_NonFunction 985 }; 986 OverloadKind CheckOverload(Scope *S, 987 FunctionDecl *New, 988 const LookupResult &OldDecls, 989 NamedDecl *&OldDecl, 990 bool IsForUsingDecl); 991 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 992 993 bool TryImplicitConversion(InitializationSequence &Sequence, 994 const InitializedEntity &Entity, 995 Expr *From, 996 bool SuppressUserConversions, 997 bool AllowExplicit, 998 bool InOverloadResolution); 999 1000 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1001 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1002 bool IsComplexPromotion(QualType FromType, QualType ToType); 1003 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1004 bool InOverloadResolution, 1005 QualType& ConvertedType, bool &IncompatibleObjC); 1006 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1007 QualType& ConvertedType, bool &IncompatibleObjC); 1008 bool FunctionArgTypesAreEqual (FunctionProtoType* OldType, 1009 FunctionProtoType* NewType); 1010 1011 bool CheckPointerConversion(Expr *From, QualType ToType, 1012 CastKind &Kind, 1013 CXXCastPath& BasePath, 1014 bool IgnoreBaseAccess); 1015 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1016 bool InOverloadResolution, 1017 QualType &ConvertedType); 1018 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1019 CastKind &Kind, 1020 CXXCastPath &BasePath, 1021 bool IgnoreBaseAccess); 1022 bool IsQualificationConversion(QualType FromType, QualType ToType); 1023 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1024 1025 1026 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1027 SourceLocation EqualLoc, 1028 ExprResult Init); 1029 bool PerformObjectArgumentInitialization(Expr *&From, 1030 NestedNameSpecifier *Qualifier, 1031 NamedDecl *FoundDecl, 1032 CXXMethodDecl *Method); 1033 1034 bool PerformContextuallyConvertToBool(Expr *&From); 1035 bool PerformContextuallyConvertToObjCId(Expr *&From); 1036 1037 ExprResult 1038 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1039 const PartialDiagnostic &NotIntDiag, 1040 const PartialDiagnostic &IncompleteDiag, 1041 const PartialDiagnostic &ExplicitConvDiag, 1042 const PartialDiagnostic &ExplicitConvNote, 1043 const PartialDiagnostic &AmbigDiag, 1044 const PartialDiagnostic &AmbigNote, 1045 const PartialDiagnostic &ConvDiag); 1046 1047 bool PerformObjectMemberConversion(Expr *&From, 1048 NestedNameSpecifier *Qualifier, 1049 NamedDecl *FoundDecl, 1050 NamedDecl *Member); 1051 1052 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1053 // TODO: make this is a typesafe union. 1054 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1055 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1056 1057 void AddOverloadCandidate(NamedDecl *Function, 1058 DeclAccessPair FoundDecl, 1059 Expr **Args, unsigned NumArgs, 1060 OverloadCandidateSet &CandidateSet); 1061 1062 void AddOverloadCandidate(FunctionDecl *Function, 1063 DeclAccessPair FoundDecl, 1064 Expr **Args, unsigned NumArgs, 1065 OverloadCandidateSet& CandidateSet, 1066 bool SuppressUserConversions = false, 1067 bool PartialOverloading = false); 1068 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1069 Expr **Args, unsigned NumArgs, 1070 OverloadCandidateSet& CandidateSet, 1071 bool SuppressUserConversions = false); 1072 void AddMethodCandidate(DeclAccessPair FoundDecl, 1073 QualType ObjectType, 1074 Expr **Args, unsigned NumArgs, 1075 OverloadCandidateSet& CandidateSet, 1076 bool SuppressUserConversion = false); 1077 void AddMethodCandidate(CXXMethodDecl *Method, 1078 DeclAccessPair FoundDecl, 1079 CXXRecordDecl *ActingContext, QualType ObjectType, 1080 Expr **Args, unsigned NumArgs, 1081 OverloadCandidateSet& CandidateSet, 1082 bool SuppressUserConversions = false); 1083 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1084 DeclAccessPair FoundDecl, 1085 CXXRecordDecl *ActingContext, 1086 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1087 QualType ObjectType, 1088 Expr **Args, unsigned NumArgs, 1089 OverloadCandidateSet& CandidateSet, 1090 bool SuppressUserConversions = false); 1091 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1092 DeclAccessPair FoundDecl, 1093 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1094 Expr **Args, unsigned NumArgs, 1095 OverloadCandidateSet& CandidateSet, 1096 bool SuppressUserConversions = false); 1097 void AddConversionCandidate(CXXConversionDecl *Conversion, 1098 DeclAccessPair FoundDecl, 1099 CXXRecordDecl *ActingContext, 1100 Expr *From, QualType ToType, 1101 OverloadCandidateSet& CandidateSet); 1102 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1103 DeclAccessPair FoundDecl, 1104 CXXRecordDecl *ActingContext, 1105 Expr *From, QualType ToType, 1106 OverloadCandidateSet &CandidateSet); 1107 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1108 DeclAccessPair FoundDecl, 1109 CXXRecordDecl *ActingContext, 1110 const FunctionProtoType *Proto, 1111 QualType ObjectTy, Expr **Args, unsigned NumArgs, 1112 OverloadCandidateSet& CandidateSet); 1113 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1114 SourceLocation OpLoc, 1115 Expr **Args, unsigned NumArgs, 1116 OverloadCandidateSet& CandidateSet, 1117 SourceRange OpRange = SourceRange()); 1118 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1119 Expr **Args, unsigned NumArgs, 1120 OverloadCandidateSet& CandidateSet, 1121 bool IsAssignmentOperator = false, 1122 unsigned NumContextualBoolArguments = 0); 1123 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1124 SourceLocation OpLoc, 1125 Expr **Args, unsigned NumArgs, 1126 OverloadCandidateSet& CandidateSet); 1127 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1128 bool Operator, 1129 Expr **Args, unsigned NumArgs, 1130 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1131 OverloadCandidateSet& CandidateSet, 1132 bool PartialOverloading = false); 1133 1134 void NoteOverloadCandidate(FunctionDecl *Fn); 1135 1136 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *From, QualType ToType, 1137 bool Complain, 1138 DeclAccessPair &Found); 1139 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From); 1140 1141 Expr *FixOverloadedFunctionReference(Expr *E, 1142 DeclAccessPair FoundDecl, 1143 FunctionDecl *Fn); 1144 ExprResult FixOverloadedFunctionReference(ExprResult, 1145 DeclAccessPair FoundDecl, 1146 FunctionDecl *Fn); 1147 1148 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1149 Expr **Args, unsigned NumArgs, 1150 OverloadCandidateSet &CandidateSet, 1151 bool PartialOverloading = false); 1152 1153 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1154 UnresolvedLookupExpr *ULE, 1155 SourceLocation LParenLoc, 1156 Expr **Args, unsigned NumArgs, 1157 SourceLocation RParenLoc); 1158 1159 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1160 unsigned Opc, 1161 const UnresolvedSetImpl &Fns, 1162 Expr *input); 1163 1164 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1165 unsigned Opc, 1166 const UnresolvedSetImpl &Fns, 1167 Expr *LHS, Expr *RHS); 1168 1169 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1170 SourceLocation RLoc, 1171 Expr *Base,Expr *Idx); 1172 1173 ExprResult 1174 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1175 SourceLocation LParenLoc, Expr **Args, 1176 unsigned NumArgs, SourceLocation RParenLoc); 1177 ExprResult 1178 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1179 Expr **Args, unsigned NumArgs, 1180 SourceLocation RParenLoc); 1181 1182 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1183 SourceLocation OpLoc); 1184 1185 /// CheckCallReturnType - Checks that a call expression's return type is 1186 /// complete. Returns true on failure. The location passed in is the location 1187 /// that best represents the call. 1188 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1189 CallExpr *CE, FunctionDecl *FD); 1190 1191 /// Helpers for dealing with blocks and functions. 1192 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1193 bool CheckParameterNames); 1194 void CheckCXXDefaultArguments(FunctionDecl *FD); 1195 void CheckExtraCXXDefaultArguments(Declarator &D); 1196 Scope *getNonFieldDeclScope(Scope *S); 1197 1198 /// \name Name lookup 1199 /// 1200 /// These routines provide name lookup that is used during semantic 1201 /// analysis to resolve the various kinds of names (identifiers, 1202 /// overloaded operator names, constructor names, etc.) into zero or 1203 /// more declarations within a particular scope. The major entry 1204 /// points are LookupName, which performs unqualified name lookup, 1205 /// and LookupQualifiedName, which performs qualified name lookup. 1206 /// 1207 /// All name lookup is performed based on some specific criteria, 1208 /// which specify what names will be visible to name lookup and how 1209 /// far name lookup should work. These criteria are important both 1210 /// for capturing language semantics (certain lookups will ignore 1211 /// certain names, for example) and for performance, since name 1212 /// lookup is often a bottleneck in the compilation of C++. Name 1213 /// lookup criteria is specified via the LookupCriteria enumeration. 1214 /// 1215 /// The results of name lookup can vary based on the kind of name 1216 /// lookup performed, the current language, and the translation 1217 /// unit. In C, for example, name lookup will either return nothing 1218 /// (no entity found) or a single declaration. In C++, name lookup 1219 /// can additionally refer to a set of overloaded functions or 1220 /// result in an ambiguity. All of the possible results of name 1221 /// lookup are captured by the LookupResult class, which provides 1222 /// the ability to distinguish among them. 1223 //@{ 1224 1225 /// @brief Describes the kind of name lookup to perform. 1226 enum LookupNameKind { 1227 /// Ordinary name lookup, which finds ordinary names (functions, 1228 /// variables, typedefs, etc.) in C and most kinds of names 1229 /// (functions, variables, members, types, etc.) in C++. 1230 LookupOrdinaryName = 0, 1231 /// Tag name lookup, which finds the names of enums, classes, 1232 /// structs, and unions. 1233 LookupTagName, 1234 /// Member name lookup, which finds the names of 1235 /// class/struct/union members. 1236 LookupMemberName, 1237 /// Look up of an operator name (e.g., operator+) for use with 1238 /// operator overloading. This lookup is similar to ordinary name 1239 /// lookup, but will ignore any declarations that are class members. 1240 LookupOperatorName, 1241 /// Look up of a name that precedes the '::' scope resolution 1242 /// operator in C++. This lookup completely ignores operator, object, 1243 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1244 LookupNestedNameSpecifierName, 1245 /// Look up a namespace name within a C++ using directive or 1246 /// namespace alias definition, ignoring non-namespace names (C++ 1247 /// [basic.lookup.udir]p1). 1248 LookupNamespaceName, 1249 /// Look up all declarations in a scope with the given name, 1250 /// including resolved using declarations. This is appropriate 1251 /// for checking redeclarations for a using declaration. 1252 LookupUsingDeclName, 1253 /// Look up an ordinary name that is going to be redeclared as a 1254 /// name with linkage. This lookup ignores any declarations that 1255 /// are outside of the current scope unless they have linkage. See 1256 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1257 LookupRedeclarationWithLinkage, 1258 /// Look up the name of an Objective-C protocol. 1259 LookupObjCProtocolName, 1260 /// \brief Look up any declaration with any name. 1261 LookupAnyName 1262 }; 1263 1264 /// \brief Specifies whether (or how) name lookup is being performed for a 1265 /// redeclaration (vs. a reference). 1266 enum RedeclarationKind { 1267 /// \brief The lookup is a reference to this name that is not for the 1268 /// purpose of redeclaring the name. 1269 NotForRedeclaration = 0, 1270 /// \brief The lookup results will be used for redeclaration of a name, 1271 /// if an entity by that name already exists. 1272 ForRedeclaration 1273 }; 1274 1275private: 1276 bool CppLookupName(LookupResult &R, Scope *S); 1277 1278public: 1279 /// \brief Look up a name, looking for a single declaration. Return 1280 /// null if the results were absent, ambiguous, or overloaded. 1281 /// 1282 /// It is preferable to use the elaborated form and explicitly handle 1283 /// ambiguity and overloaded. 1284 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1285 SourceLocation Loc, 1286 LookupNameKind NameKind, 1287 RedeclarationKind Redecl 1288 = NotForRedeclaration); 1289 bool LookupName(LookupResult &R, Scope *S, 1290 bool AllowBuiltinCreation = false); 1291 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1292 bool InUnqualifiedLookup = false); 1293 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1294 bool AllowBuiltinCreation = false, 1295 bool EnteringContext = false); 1296 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1297 1298 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1299 QualType T1, QualType T2, 1300 UnresolvedSetImpl &Functions); 1301 1302 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1303 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1304 1305 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1306 Expr **Args, unsigned NumArgs, 1307 ADLResult &Functions); 1308 1309 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1310 VisibleDeclConsumer &Consumer, 1311 bool IncludeGlobalScope = true); 1312 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1313 VisibleDeclConsumer &Consumer, 1314 bool IncludeGlobalScope = true); 1315 1316 /// \brief The context in which typo-correction occurs. 1317 /// 1318 /// The typo-correction context affects which keywords (if any) are 1319 /// considered when trying to correct for typos. 1320 enum CorrectTypoContext { 1321 /// \brief An unknown context, where any keyword might be valid. 1322 CTC_Unknown, 1323 /// \brief A context where no keywords are used (e.g. we expect an actual 1324 /// name). 1325 CTC_NoKeywords, 1326 /// \brief A context where we're correcting a type name. 1327 CTC_Type, 1328 /// \brief An expression context. 1329 CTC_Expression, 1330 /// \brief A type cast, or anything else that can be followed by a '<'. 1331 CTC_CXXCasts, 1332 /// \brief A member lookup context. 1333 CTC_MemberLookup, 1334 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1335 CTC_ObjCIvarLookup, 1336 /// \brief An Objective-C property lookup context (e.g., self.prop). 1337 CTC_ObjCPropertyLookup, 1338 /// \brief The receiver of an Objective-C message send within an 1339 /// Objective-C method where 'super' is a valid keyword. 1340 CTC_ObjCMessageReceiver 1341 }; 1342 1343 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1344 DeclContext *MemberContext = 0, 1345 bool EnteringContext = false, 1346 CorrectTypoContext CTC = CTC_Unknown, 1347 const ObjCObjectPointerType *OPT = 0); 1348 1349 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1350 AssociatedNamespaceSet &AssociatedNamespaces, 1351 AssociatedClassSet &AssociatedClasses); 1352 1353 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1354 //@} 1355 1356 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1357 SourceLocation IdLoc, 1358 bool TypoCorrection = false); 1359 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1360 Scope *S, bool ForRedeclaration, 1361 SourceLocation Loc); 1362 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1363 Scope *S); 1364 void AddKnownFunctionAttributes(FunctionDecl *FD); 1365 1366 // More parsing and symbol table subroutines. 1367 1368 // Decl attributes - this routine is the top level dispatcher. 1369 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD); 1370 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL); 1371 1372 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1373 bool &IncompleteImpl, unsigned DiagID); 1374 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1375 ObjCMethodDecl *IntfMethod); 1376 1377 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1378 ObjCInterfaceDecl *IDecl); 1379 1380 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1381 1382 /// CheckProtocolMethodDefs - This routine checks unimplemented 1383 /// methods declared in protocol, and those referenced by it. 1384 /// \param IDecl - Used for checking for methods which may have been 1385 /// inherited. 1386 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1387 ObjCProtocolDecl *PDecl, 1388 bool& IncompleteImpl, 1389 const SelectorSet &InsMap, 1390 const SelectorSet &ClsMap, 1391 ObjCContainerDecl *CDecl); 1392 1393 /// CheckImplementationIvars - This routine checks if the instance variables 1394 /// listed in the implelementation match those listed in the interface. 1395 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1396 ObjCIvarDecl **Fields, unsigned nIvars, 1397 SourceLocation Loc); 1398 1399 /// \brief Determine whether we can synthesize a provisional ivar for the 1400 /// given name. 1401 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1402 1403 /// \brief Determine whether we can synthesize a provisional ivar for the 1404 /// given property. 1405 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1406 1407 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1408 /// remains unimplemented in the class or category @implementation. 1409 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1410 ObjCContainerDecl* IDecl, 1411 bool IncompleteImpl = false); 1412 1413 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1414 /// which must be implemented by this implementation. 1415 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1416 ObjCContainerDecl *CDecl, 1417 const SelectorSet &InsMap); 1418 1419 /// DefaultSynthesizeProperties - This routine default synthesizes all 1420 /// properties which must be synthesized in class's @implementation. 1421 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1422 ObjCInterfaceDecl *IDecl); 1423 1424 /// CollectImmediateProperties - This routine collects all properties in 1425 /// the class and its conforming protocols; but not those it its super class. 1426 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1427 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1428 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1429 1430 1431 /// LookupPropertyDecl - Looks up a property in the current class and all 1432 /// its protocols. 1433 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1434 IdentifierInfo *II); 1435 1436 /// Called by ActOnProperty to handle @property declarations in 1437 //// class extensions. 1438 Decl *HandlePropertyInClassExtension(Scope *S, 1439 ObjCCategoryDecl *CDecl, 1440 SourceLocation AtLoc, 1441 FieldDeclarator &FD, 1442 Selector GetterSel, 1443 Selector SetterSel, 1444 const bool isAssign, 1445 const bool isReadWrite, 1446 const unsigned Attributes, 1447 bool *isOverridingProperty, 1448 TypeSourceInfo *T, 1449 tok::ObjCKeywordKind MethodImplKind); 1450 1451 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1452 /// handle creating the ObjcPropertyDecl for a category or @interface. 1453 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1454 ObjCContainerDecl *CDecl, 1455 SourceLocation AtLoc, 1456 FieldDeclarator &FD, 1457 Selector GetterSel, 1458 Selector SetterSel, 1459 const bool isAssign, 1460 const bool isReadWrite, 1461 const unsigned Attributes, 1462 TypeSourceInfo *T, 1463 tok::ObjCKeywordKind MethodImplKind, 1464 DeclContext *lexicalDC = 0); 1465 1466 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1467 /// warning) when atomic property has one but not the other user-declared 1468 /// setter or getter. 1469 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1470 ObjCContainerDecl* IDecl); 1471 1472 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1473 1474 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1475 /// true, or false, accordingly. 1476 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1477 const ObjCMethodDecl *PrevMethod, 1478 bool matchBasedOnSizeAndAlignment = false, 1479 bool matchBasedOnStrictEqulity = false); 1480 1481 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1482 /// or protocol against those declared in their implementations. 1483 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1484 const SelectorSet &ClsMap, 1485 SelectorSet &InsMapSeen, 1486 SelectorSet &ClsMapSeen, 1487 ObjCImplDecl* IMPDecl, 1488 ObjCContainerDecl* IDecl, 1489 bool &IncompleteImpl, 1490 bool ImmediateClass); 1491 1492private: 1493 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1494 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1495 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1496 1497 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1498 /// optionally warns if there are multiple signatures. 1499 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1500 bool receiverIdOrClass, 1501 bool warn, bool instance); 1502 1503public: 1504 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1505 /// unit are added to a global pool. This allows us to efficiently associate 1506 /// a selector with a method declaraation for purposes of typechecking 1507 /// messages sent to "id" (where the class of the object is unknown). 1508 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1509 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1510 } 1511 1512 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1513 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1514 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1515 } 1516 1517 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1518 /// there are multiple signatures. 1519 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1520 bool receiverIdOrClass=false, 1521 bool warn=true) { 1522 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1523 warn, /*instance*/true); 1524 } 1525 1526 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1527 /// there are multiple signatures. 1528 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1529 bool receiverIdOrClass=false, 1530 bool warn=true) { 1531 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1532 warn, /*instance*/false); 1533 } 1534 1535 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1536 /// implementation. 1537 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1538 1539 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1540 /// initialization. 1541 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1542 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1543 //===--------------------------------------------------------------------===// 1544 // Statement Parsing Callbacks: SemaStmt.cpp. 1545public: 1546 class FullExprArg { 1547 public: 1548 FullExprArg(Sema &actions) : E(0) { } 1549 1550 // FIXME: The const_cast here is ugly. RValue references would make this 1551 // much nicer (or we could duplicate a bunch of the move semantics 1552 // emulation code from Ownership.h). 1553 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1554 1555 ExprResult release() { 1556 return move(E); 1557 } 1558 1559 Expr *get() const { return E; } 1560 1561 Expr *operator->() { 1562 return E; 1563 } 1564 1565 private: 1566 // FIXME: No need to make the entire Sema class a friend when it's just 1567 // Sema::MakeFullExpr that needs access to the constructor below. 1568 friend class Sema; 1569 1570 explicit FullExprArg(Expr *expr) : E(expr) {} 1571 1572 Expr *E; 1573 }; 1574 1575 FullExprArg MakeFullExpr(Expr *Arg) { 1576 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1577 } 1578 1579 StmtResult ActOnExprStmt(FullExprArg Expr); 1580 1581 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1582 bool LeadingEmptyMacro = false); 1583 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1584 MultiStmtArg Elts, 1585 bool isStmtExpr); 1586 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1587 SourceLocation StartLoc, 1588 SourceLocation EndLoc); 1589 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1590 StmtResult ActOnForEachLValueExpr(Expr *E); 1591 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1592 SourceLocation DotDotDotLoc, Expr *RHSVal, 1593 SourceLocation ColonLoc); 1594 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1595 1596 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1597 SourceLocation ColonLoc, 1598 Stmt *SubStmt, Scope *CurScope); 1599 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 1600 SourceLocation ColonLoc, Stmt *SubStmt, 1601 const AttributeList *Attr); 1602 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, IdentifierInfo *II, 1603 SourceLocation ColonLoc, Stmt *SubStmt, 1604 bool HasUnusedAttr); 1605 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1606 FullExprArg CondVal, Decl *CondVar, 1607 Stmt *ThenVal, 1608 SourceLocation ElseLoc, Stmt *ElseVal); 1609 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1610 Expr *Cond, 1611 Decl *CondVar); 1612 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1613 Stmt *Switch, Stmt *Body); 1614 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1615 FullExprArg Cond, 1616 Decl *CondVar, Stmt *Body); 1617 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1618 SourceLocation WhileLoc, 1619 SourceLocation CondLParen, Expr *Cond, 1620 SourceLocation CondRParen); 1621 1622 StmtResult ActOnForStmt(SourceLocation ForLoc, 1623 SourceLocation LParenLoc, 1624 Stmt *First, FullExprArg Second, 1625 Decl *SecondVar, 1626 FullExprArg Third, 1627 SourceLocation RParenLoc, 1628 Stmt *Body); 1629 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1630 SourceLocation LParenLoc, 1631 Stmt *First, Expr *Second, 1632 SourceLocation RParenLoc, Stmt *Body); 1633 1634 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1635 SourceLocation LabelLoc, 1636 IdentifierInfo *LabelII); 1637 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1638 SourceLocation StarLoc, 1639 Expr *DestExp); 1640 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1641 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1642 1643 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1644 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1645 1646 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1647 bool IsSimple, bool IsVolatile, 1648 unsigned NumOutputs, unsigned NumInputs, 1649 IdentifierInfo **Names, 1650 MultiExprArg Constraints, 1651 MultiExprArg Exprs, 1652 Expr *AsmString, 1653 MultiExprArg Clobbers, 1654 SourceLocation RParenLoc, 1655 bool MSAsm = false); 1656 1657 1658 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1659 IdentifierInfo *Name, SourceLocation NameLoc, 1660 bool Invalid = false); 1661 1662 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1663 1664 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1665 Decl *Parm, Stmt *Body); 1666 1667 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1668 1669 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1670 MultiStmtArg Catch, Stmt *Finally); 1671 1672 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1673 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1674 Scope *CurScope); 1675 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1676 Expr *SynchExpr, 1677 Stmt *SynchBody); 1678 1679 VarDecl *BuildExceptionDeclaration(Scope *S, 1680 TypeSourceInfo *TInfo, 1681 IdentifierInfo *Name, 1682 SourceLocation Loc); 1683 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1684 1685 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1686 Decl *ExDecl, Stmt *HandlerBlock); 1687 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1688 MultiStmtArg Handlers); 1689 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1690 1691 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1692 1693 /// \brief If it's a file scoped decl that must warn if not used, keep track 1694 /// of it. 1695 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1696 1697 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1698 /// whose result is unused, warn. 1699 void DiagnoseUnusedExprResult(const Stmt *S); 1700 void DiagnoseUnusedDecl(const NamedDecl *ND); 1701 1702 typedef uintptr_t ParsingDeclStackState; 1703 1704 ParsingDeclStackState PushParsingDeclaration(); 1705 void PopParsingDeclaration(ParsingDeclStackState S, Decl *D); 1706 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1707 SourceLocation Loc, bool UnknownObjCClass=false); 1708 1709 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1710 1711 //===--------------------------------------------------------------------===// 1712 // Expression Parsing Callbacks: SemaExpr.cpp. 1713 1714 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1715 bool UnknownObjCClass=false); 1716 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1717 ObjCMethodDecl *Getter, 1718 SourceLocation Loc); 1719 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1720 Expr **Args, unsigned NumArgs); 1721 1722 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1723 1724 void PopExpressionEvaluationContext(); 1725 1726 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1727 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1728 void MarkDeclarationsReferencedInExpr(Expr *E); 1729 bool DiagRuntimeBehavior(SourceLocation Loc, const PartialDiagnostic &PD); 1730 1731 // Primary Expressions. 1732 SourceRange getExprRange(Expr *E) const; 1733 1734 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1735 bool HasTrailingLParen, bool IsAddressOfOperand); 1736 1737 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1738 CorrectTypoContext CTC = CTC_Unknown); 1739 1740 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1741 bool AllowBuiltinCreation=false); 1742 1743 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1744 const DeclarationNameInfo &NameInfo, 1745 bool isAddressOfOperand, 1746 const TemplateArgumentListInfo *TemplateArgs); 1747 1748 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1749 ExprValueKind VK, 1750 SourceLocation Loc, 1751 const CXXScopeSpec *SS = 0); 1752 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1753 ExprValueKind VK, 1754 const DeclarationNameInfo &NameInfo, 1755 const CXXScopeSpec *SS = 0); 1756 ExprResult 1757 BuildAnonymousStructUnionMemberReference(SourceLocation Loc, 1758 IndirectFieldDecl *IndirectField, 1759 Expr *BaseObjectExpr = 0, 1760 SourceLocation OpLoc = SourceLocation()); 1761 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1762 LookupResult &R, 1763 const TemplateArgumentListInfo *TemplateArgs); 1764 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1765 LookupResult &R, 1766 const TemplateArgumentListInfo *TemplateArgs, 1767 bool IsDefiniteInstance); 1768 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1769 const LookupResult &R, 1770 bool HasTrailingLParen); 1771 1772 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1773 const DeclarationNameInfo &NameInfo); 1774 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1775 const DeclarationNameInfo &NameInfo, 1776 const TemplateArgumentListInfo *TemplateArgs); 1777 1778 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1779 LookupResult &R, 1780 bool ADL); 1781 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1782 const DeclarationNameInfo &NameInfo, 1783 NamedDecl *D); 1784 1785 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 1786 ExprResult ActOnNumericConstant(const Token &); 1787 ExprResult ActOnCharacterConstant(const Token &); 1788 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 1789 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 1790 SourceLocation R, 1791 MultiExprArg Val, 1792 ParsedType TypeOfCast = ParsedType()); 1793 1794 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 1795 /// fragments (e.g. "foo" "bar" L"baz"). 1796 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 1797 1798 // Binary/Unary Operators. 'Tok' is the token for the operator. 1799 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, unsigned OpcIn, 1800 Expr *InputArg); 1801 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 1802 UnaryOperatorKind Opc, Expr *input); 1803 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 1804 tok::TokenKind Op, Expr *Input); 1805 1806 ExprResult CreateSizeOfAlignOfExpr(TypeSourceInfo *T, 1807 SourceLocation OpLoc, 1808 bool isSizeOf, SourceRange R); 1809 ExprResult CreateSizeOfAlignOfExpr(Expr *E, SourceLocation OpLoc, 1810 bool isSizeOf, SourceRange R); 1811 ExprResult 1812 ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType, 1813 void *TyOrEx, const SourceRange &ArgRange); 1814 1815 ExprResult CheckPlaceholderExpr(Expr *E, SourceLocation Loc); 1816 1817 bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc, 1818 SourceRange R, bool isSizeof); 1819 1820 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 1821 tok::TokenKind Kind, Expr *Input); 1822 1823 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 1824 Expr *Idx, SourceLocation RLoc); 1825 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 1826 Expr *Idx, SourceLocation RLoc); 1827 1828 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 1829 SourceLocation OpLoc, bool IsArrow, 1830 CXXScopeSpec &SS, 1831 NamedDecl *FirstQualifierInScope, 1832 const DeclarationNameInfo &NameInfo, 1833 const TemplateArgumentListInfo *TemplateArgs); 1834 1835 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 1836 SourceLocation OpLoc, bool IsArrow, 1837 const CXXScopeSpec &SS, 1838 NamedDecl *FirstQualifierInScope, 1839 LookupResult &R, 1840 const TemplateArgumentListInfo *TemplateArgs, 1841 bool SuppressQualifierCheck = false); 1842 1843 ExprResult LookupMemberExpr(LookupResult &R, Expr *&Base, 1844 bool &IsArrow, SourceLocation OpLoc, 1845 CXXScopeSpec &SS, 1846 Decl *ObjCImpDecl, 1847 bool HasTemplateArgs); 1848 1849 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 1850 const CXXScopeSpec &SS, 1851 const LookupResult &R); 1852 1853 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 1854 bool IsArrow, SourceLocation OpLoc, 1855 const CXXScopeSpec &SS, 1856 NamedDecl *FirstQualifierInScope, 1857 const DeclarationNameInfo &NameInfo, 1858 const TemplateArgumentListInfo *TemplateArgs); 1859 1860 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 1861 SourceLocation OpLoc, 1862 tok::TokenKind OpKind, 1863 CXXScopeSpec &SS, 1864 UnqualifiedId &Member, 1865 Decl *ObjCImpDecl, 1866 bool HasTrailingLParen); 1867 1868 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 1869 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 1870 FunctionDecl *FDecl, 1871 const FunctionProtoType *Proto, 1872 Expr **Args, unsigned NumArgs, 1873 SourceLocation RParenLoc); 1874 1875 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 1876 /// This provides the location of the left/right parens and a list of comma 1877 /// locations. 1878 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 1879 MultiExprArg Args, SourceLocation RParenLoc); 1880 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 1881 SourceLocation LParenLoc, 1882 Expr **Args, unsigned NumArgs, 1883 SourceLocation RParenLoc); 1884 1885 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 1886 ParsedType Ty, SourceLocation RParenLoc, 1887 Expr *Op); 1888 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 1889 TypeSourceInfo *Ty, 1890 SourceLocation RParenLoc, 1891 Expr *Op); 1892 1893 bool TypeIsVectorType(ParsedType Ty) { 1894 return GetTypeFromParser(Ty)->isVectorType(); 1895 } 1896 1897 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 1898 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 1899 SourceLocation RParenLoc, Expr *E, 1900 TypeSourceInfo *TInfo); 1901 1902 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 1903 ParsedType Ty, 1904 SourceLocation RParenLoc, 1905 Expr *Op); 1906 1907 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 1908 TypeSourceInfo *TInfo, 1909 SourceLocation RParenLoc, 1910 Expr *InitExpr); 1911 1912 ExprResult ActOnInitList(SourceLocation LParenLoc, 1913 MultiExprArg InitList, 1914 SourceLocation RParenLoc); 1915 1916 ExprResult ActOnDesignatedInitializer(Designation &Desig, 1917 SourceLocation Loc, 1918 bool GNUSyntax, 1919 ExprResult Init); 1920 1921 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 1922 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 1923 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 1924 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 1925 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 1926 unsigned Opc, Expr *lhs, Expr *rhs); 1927 1928 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 1929 /// in the case of a the GNU conditional expr extension. 1930 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 1931 SourceLocation ColonLoc, 1932 Expr *Cond, Expr *LHS, Expr *RHS); 1933 1934 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 1935 ExprResult ActOnAddrLabel(SourceLocation OpLoc, 1936 SourceLocation LabLoc, 1937 IdentifierInfo *LabelII); 1938 1939 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 1940 SourceLocation RPLoc); // "({..})" 1941 1942 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 1943 struct OffsetOfComponent { 1944 SourceLocation LocStart, LocEnd; 1945 bool isBrackets; // true if [expr], false if .ident 1946 union { 1947 IdentifierInfo *IdentInfo; 1948 ExprTy *E; 1949 } U; 1950 }; 1951 1952 /// __builtin_offsetof(type, a.b[123][456].c) 1953 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 1954 TypeSourceInfo *TInfo, 1955 OffsetOfComponent *CompPtr, 1956 unsigned NumComponents, 1957 SourceLocation RParenLoc); 1958 ExprResult ActOnBuiltinOffsetOf(Scope *S, 1959 SourceLocation BuiltinLoc, 1960 SourceLocation TypeLoc, 1961 ParsedType Arg1, 1962 OffsetOfComponent *CompPtr, 1963 unsigned NumComponents, 1964 SourceLocation RParenLoc); 1965 1966 // __builtin_choose_expr(constExpr, expr1, expr2) 1967 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 1968 Expr *cond, Expr *expr1, 1969 Expr *expr2, SourceLocation RPLoc); 1970 1971 // __builtin_va_arg(expr, type) 1972 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 1973 Expr *expr, ParsedType type, 1974 SourceLocation RPLoc); 1975 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 1976 Expr *expr, TypeSourceInfo *TInfo, 1977 SourceLocation RPLoc); 1978 1979 // __null 1980 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 1981 1982 //===------------------------- "Block" Extension ------------------------===// 1983 1984 /// ActOnBlockStart - This callback is invoked when a block literal is 1985 /// started. 1986 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 1987 1988 /// ActOnBlockArguments - This callback allows processing of block arguments. 1989 /// If there are no arguments, this is still invoked. 1990 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 1991 1992 /// ActOnBlockError - If there is an error parsing a block, this callback 1993 /// is invoked to pop the information about the block from the action impl. 1994 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 1995 1996 /// ActOnBlockStmtExpr - This is called when the body of a block statement 1997 /// literal was successfully completed. ^(int x){...} 1998 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 1999 Stmt *Body, Scope *CurScope); 2000 2001 //===---------------------------- C++ Features --------------------------===// 2002 2003 // Act on C++ namespaces 2004 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2005 SourceLocation IdentLoc, 2006 IdentifierInfo *Ident, 2007 SourceLocation LBrace, 2008 AttributeList *AttrList); 2009 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2010 2011 NamespaceDecl *getStdNamespace() const; 2012 NamespaceDecl *getOrCreateStdNamespace(); 2013 2014 CXXRecordDecl *getStdBadAlloc() const; 2015 2016 Decl *ActOnUsingDirective(Scope *CurScope, 2017 SourceLocation UsingLoc, 2018 SourceLocation NamespcLoc, 2019 CXXScopeSpec &SS, 2020 SourceLocation IdentLoc, 2021 IdentifierInfo *NamespcName, 2022 AttributeList *AttrList); 2023 2024 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2025 2026 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2027 SourceLocation NamespaceLoc, 2028 SourceLocation AliasLoc, 2029 IdentifierInfo *Alias, 2030 CXXScopeSpec &SS, 2031 SourceLocation IdentLoc, 2032 IdentifierInfo *Ident); 2033 2034 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2035 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2036 const LookupResult &PreviousDecls); 2037 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2038 NamedDecl *Target); 2039 2040 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2041 bool isTypeName, 2042 const CXXScopeSpec &SS, 2043 SourceLocation NameLoc, 2044 const LookupResult &Previous); 2045 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2046 const CXXScopeSpec &SS, 2047 SourceLocation NameLoc); 2048 2049 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2050 SourceLocation UsingLoc, 2051 CXXScopeSpec &SS, 2052 const DeclarationNameInfo &NameInfo, 2053 AttributeList *AttrList, 2054 bool IsInstantiation, 2055 bool IsTypeName, 2056 SourceLocation TypenameLoc); 2057 2058 Decl *ActOnUsingDeclaration(Scope *CurScope, 2059 AccessSpecifier AS, 2060 bool HasUsingKeyword, 2061 SourceLocation UsingLoc, 2062 CXXScopeSpec &SS, 2063 UnqualifiedId &Name, 2064 AttributeList *AttrList, 2065 bool IsTypeName, 2066 SourceLocation TypenameLoc); 2067 2068 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2069 /// ActOnDeclarator, when a C++ direct initializer is present. 2070 /// e.g: "int x(1);" 2071 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2072 SourceLocation LParenLoc, 2073 MultiExprArg Exprs, 2074 SourceLocation RParenLoc); 2075 2076 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2077 /// and sets it as the initializer for the the passed in VarDecl. 2078 bool InitializeVarWithConstructor(VarDecl *VD, 2079 CXXConstructorDecl *Constructor, 2080 MultiExprArg Exprs); 2081 2082 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2083 /// including handling of its default argument expressions. 2084 /// 2085 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2086 ExprResult 2087 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2088 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2089 bool RequiresZeroInit, unsigned ConstructKind, 2090 SourceRange ParenRange); 2091 2092 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2093 // the constructor can be elidable? 2094 ExprResult 2095 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2096 CXXConstructorDecl *Constructor, bool Elidable, 2097 MultiExprArg Exprs, bool RequiresZeroInit, 2098 unsigned ConstructKind, 2099 SourceRange ParenRange); 2100 2101 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2102 /// the default expr if needed. 2103 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2104 FunctionDecl *FD, 2105 ParmVarDecl *Param); 2106 2107 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2108 /// constructed variable. 2109 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2110 2111 /// \brief Declare the implicit default constructor for the given class. 2112 /// 2113 /// \param ClassDecl The class declaration into which the implicit 2114 /// default constructor will be added. 2115 /// 2116 /// \returns The implicitly-declared default constructor. 2117 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2118 CXXRecordDecl *ClassDecl); 2119 2120 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2121 /// defining this constructor as the default constructor. 2122 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2123 CXXConstructorDecl *Constructor); 2124 2125 /// \brief Declare the implicit destructor for the given class. 2126 /// 2127 /// \param ClassDecl The class declaration into which the implicit 2128 /// destructor will be added. 2129 /// 2130 /// \returns The implicitly-declared destructor. 2131 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2132 2133 /// DefineImplicitDestructor - Checks for feasibility of 2134 /// defining this destructor as the default destructor. 2135 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2136 CXXDestructorDecl *Destructor); 2137 2138 /// \brief Declare the implicit copy constructor for the given class. 2139 /// 2140 /// \param S The scope of the class, which may be NULL if this is a 2141 /// template instantiation. 2142 /// 2143 /// \param ClassDecl The class declaration into which the implicit 2144 /// copy constructor will be added. 2145 /// 2146 /// \returns The implicitly-declared copy constructor. 2147 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2148 2149 /// DefineImplicitCopyConstructor - Checks for feasibility of 2150 /// defining this constructor as the copy constructor. 2151 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2152 CXXConstructorDecl *Constructor, 2153 unsigned TypeQuals); 2154 2155 /// \brief Declare the implicit copy assignment operator for the given class. 2156 /// 2157 /// \param S The scope of the class, which may be NULL if this is a 2158 /// template instantiation. 2159 /// 2160 /// \param ClassDecl The class declaration into which the implicit 2161 /// copy-assignment operator will be added. 2162 /// 2163 /// \returns The implicitly-declared copy assignment operator. 2164 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2165 2166 /// \brief Defined an implicitly-declared copy assignment operator. 2167 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2168 CXXMethodDecl *MethodDecl); 2169 2170 /// \brief Force the declaration of any implicitly-declared members of this 2171 /// class. 2172 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2173 2174 /// MaybeBindToTemporary - If the passed in expression has a record type with 2175 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2176 /// it simply returns the passed in expression. 2177 ExprResult MaybeBindToTemporary(Expr *E); 2178 2179 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2180 MultiExprArg ArgsPtr, 2181 SourceLocation Loc, 2182 ASTOwningVector<Expr*> &ConvertedArgs); 2183 2184 ParsedType getDestructorName(SourceLocation TildeLoc, 2185 IdentifierInfo &II, SourceLocation NameLoc, 2186 Scope *S, CXXScopeSpec &SS, 2187 ParsedType ObjectType, 2188 bool EnteringContext); 2189 2190 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2191 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2192 tok::TokenKind Kind, 2193 SourceLocation LAngleBracketLoc, 2194 ParsedType Ty, 2195 SourceLocation RAngleBracketLoc, 2196 SourceLocation LParenLoc, 2197 Expr *E, 2198 SourceLocation RParenLoc); 2199 2200 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2201 tok::TokenKind Kind, 2202 TypeSourceInfo *Ty, 2203 Expr *E, 2204 SourceRange AngleBrackets, 2205 SourceRange Parens); 2206 2207 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2208 SourceLocation TypeidLoc, 2209 TypeSourceInfo *Operand, 2210 SourceLocation RParenLoc); 2211 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2212 SourceLocation TypeidLoc, 2213 Expr *Operand, 2214 SourceLocation RParenLoc); 2215 2216 /// ActOnCXXTypeid - Parse typeid( something ). 2217 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2218 SourceLocation LParenLoc, bool isType, 2219 void *TyOrExpr, 2220 SourceLocation RParenLoc); 2221 2222 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2223 SourceLocation TypeidLoc, 2224 TypeSourceInfo *Operand, 2225 SourceLocation RParenLoc); 2226 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2227 SourceLocation TypeidLoc, 2228 Expr *Operand, 2229 SourceLocation RParenLoc); 2230 2231 /// ActOnCXXUuidof - Parse __uuidof( something ). 2232 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2233 SourceLocation LParenLoc, bool isType, 2234 void *TyOrExpr, 2235 SourceLocation RParenLoc); 2236 2237 2238 //// ActOnCXXThis - Parse 'this' pointer. 2239 ExprResult ActOnCXXThis(SourceLocation ThisLoc); 2240 2241 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2242 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2243 2244 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2245 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2246 2247 //// ActOnCXXThrow - Parse throw expressions. 2248 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2249 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E); 2250 2251 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2252 /// Can be interpreted either as function-style casting ("int(x)") 2253 /// or class type construction ("ClassType(x,y,z)") 2254 /// or creation of a value-initialized type ("int()"). 2255 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2256 SourceLocation LParenLoc, 2257 MultiExprArg Exprs, 2258 SourceLocation RParenLoc); 2259 2260 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2261 SourceLocation LParenLoc, 2262 MultiExprArg Exprs, 2263 SourceLocation RParenLoc); 2264 2265 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2266 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2267 SourceLocation PlacementLParen, 2268 MultiExprArg PlacementArgs, 2269 SourceLocation PlacementRParen, 2270 SourceRange TypeIdParens, Declarator &D, 2271 SourceLocation ConstructorLParen, 2272 MultiExprArg ConstructorArgs, 2273 SourceLocation ConstructorRParen); 2274 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2275 SourceLocation PlacementLParen, 2276 MultiExprArg PlacementArgs, 2277 SourceLocation PlacementRParen, 2278 SourceRange TypeIdParens, 2279 QualType AllocType, 2280 TypeSourceInfo *AllocTypeInfo, 2281 Expr *ArraySize, 2282 SourceLocation ConstructorLParen, 2283 MultiExprArg ConstructorArgs, 2284 SourceLocation ConstructorRParen); 2285 2286 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2287 SourceRange R); 2288 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2289 bool UseGlobal, QualType AllocType, bool IsArray, 2290 Expr **PlaceArgs, unsigned NumPlaceArgs, 2291 FunctionDecl *&OperatorNew, 2292 FunctionDecl *&OperatorDelete); 2293 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2294 DeclarationName Name, Expr** Args, 2295 unsigned NumArgs, DeclContext *Ctx, 2296 bool AllowMissing, FunctionDecl *&Operator); 2297 void DeclareGlobalNewDelete(); 2298 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2299 QualType Argument, 2300 bool addMallocAttr = false); 2301 2302 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2303 DeclarationName Name, FunctionDecl* &Operator); 2304 2305 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2306 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2307 bool UseGlobal, bool ArrayForm, 2308 Expr *Operand); 2309 2310 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2311 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2312 SourceLocation StmtLoc, 2313 bool ConvertToBoolean); 2314 2315 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2316 Expr *Operand, SourceLocation RParen); 2317 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2318 SourceLocation RParen); 2319 2320 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2321 /// pseudo-functions. 2322 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2323 SourceLocation KWLoc, 2324 ParsedType Ty, 2325 SourceLocation RParen); 2326 2327 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2328 SourceLocation KWLoc, 2329 TypeSourceInfo *T, 2330 SourceLocation RParen); 2331 2332 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2333 /// pseudo-functions. 2334 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2335 SourceLocation KWLoc, 2336 ParsedType LhsTy, 2337 ParsedType RhsTy, 2338 SourceLocation RParen); 2339 2340 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2341 SourceLocation KWLoc, 2342 TypeSourceInfo *LhsT, 2343 TypeSourceInfo *RhsT, 2344 SourceLocation RParen); 2345 2346 ExprResult ActOnStartCXXMemberReference(Scope *S, 2347 Expr *Base, 2348 SourceLocation OpLoc, 2349 tok::TokenKind OpKind, 2350 ParsedType &ObjectType, 2351 bool &MayBePseudoDestructor); 2352 2353 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2354 2355 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2356 SourceLocation OpLoc, 2357 tok::TokenKind OpKind, 2358 const CXXScopeSpec &SS, 2359 TypeSourceInfo *ScopeType, 2360 SourceLocation CCLoc, 2361 SourceLocation TildeLoc, 2362 PseudoDestructorTypeStorage DestroyedType, 2363 bool HasTrailingLParen); 2364 2365 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2366 SourceLocation OpLoc, 2367 tok::TokenKind OpKind, 2368 CXXScopeSpec &SS, 2369 UnqualifiedId &FirstTypeName, 2370 SourceLocation CCLoc, 2371 SourceLocation TildeLoc, 2372 UnqualifiedId &SecondTypeName, 2373 bool HasTrailingLParen); 2374 2375 /// MaybeCreateExprWithCleanups - If the current full-expression 2376 /// requires any cleanups, surround it with a ExprWithCleanups node. 2377 /// Otherwise, just returns the passed-in expression. 2378 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2379 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2380 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2381 2382 ExprResult ActOnFinishFullExpr(Expr *Expr); 2383 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2384 2385 // Marks SS invalid if it represents an incomplete type. 2386 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2387 2388 DeclContext *computeDeclContext(QualType T); 2389 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2390 bool EnteringContext = false); 2391 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2392 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2393 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2394 2395 /// ActOnCXXGlobalScopeSpecifier - Return the object that represents the 2396 /// global scope ('::'). 2397 NestedNameSpecifier * 2398 ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc); 2399 2400 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2401 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2402 2403 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2404 SourceLocation IdLoc, 2405 IdentifierInfo &II, 2406 ParsedType ObjectType); 2407 2408 NestedNameSpecifier *BuildCXXNestedNameSpecifier(Scope *S, 2409 CXXScopeSpec &SS, 2410 SourceLocation IdLoc, 2411 SourceLocation CCLoc, 2412 IdentifierInfo &II, 2413 QualType ObjectType, 2414 NamedDecl *ScopeLookupResult, 2415 bool EnteringContext, 2416 bool ErrorRecoveryLookup); 2417 2418 NestedNameSpecifier *ActOnCXXNestedNameSpecifier(Scope *S, 2419 CXXScopeSpec &SS, 2420 SourceLocation IdLoc, 2421 SourceLocation CCLoc, 2422 IdentifierInfo &II, 2423 ParsedType ObjectType, 2424 bool EnteringContext); 2425 2426 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2427 IdentifierInfo &II, 2428 ParsedType ObjectType, 2429 bool EnteringContext); 2430 2431 /// ActOnCXXNestedNameSpecifier - Called during parsing of a 2432 /// nested-name-specifier that involves a template-id, e.g., 2433 /// "foo::bar<int, float>::", and now we need to build a scope 2434 /// specifier. \p SS is empty or the previously parsed nested-name 2435 /// part ("foo::"), \p Type is the already-parsed class template 2436 /// specialization (or other template-id that names a type), \p 2437 /// TypeRange is the source range where the type is located, and \p 2438 /// CCLoc is the location of the trailing '::'. 2439 CXXScopeTy *ActOnCXXNestedNameSpecifier(Scope *S, 2440 const CXXScopeSpec &SS, 2441 ParsedType Type, 2442 SourceRange TypeRange, 2443 SourceLocation CCLoc); 2444 2445 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2446 2447 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2448 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2449 /// After this method is called, according to [C++ 3.4.3p3], names should be 2450 /// looked up in the declarator-id's scope, until the declarator is parsed and 2451 /// ActOnCXXExitDeclaratorScope is called. 2452 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2453 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2454 2455 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2456 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2457 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2458 /// Used to indicate that names should revert to being looked up in the 2459 /// defining scope. 2460 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2461 2462 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2463 /// initializer for the declaration 'Dcl'. 2464 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2465 /// static data member of class X, names should be looked up in the scope of 2466 /// class X. 2467 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2468 2469 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2470 /// initializer for the declaration 'Dcl'. 2471 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2472 2473 // ParseObjCStringLiteral - Parse Objective-C string literals. 2474 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2475 Expr **Strings, 2476 unsigned NumStrings); 2477 2478 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2479 TypeSourceInfo *EncodedTypeInfo, 2480 SourceLocation RParenLoc); 2481 CXXMemberCallExpr *BuildCXXMemberCallExpr(Expr *Exp, 2482 NamedDecl *FoundDecl, 2483 CXXMethodDecl *Method); 2484 2485 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2486 SourceLocation EncodeLoc, 2487 SourceLocation LParenLoc, 2488 ParsedType Ty, 2489 SourceLocation RParenLoc); 2490 2491 // ParseObjCSelectorExpression - Build selector expression for @selector 2492 ExprResult ParseObjCSelectorExpression(Selector Sel, 2493 SourceLocation AtLoc, 2494 SourceLocation SelLoc, 2495 SourceLocation LParenLoc, 2496 SourceLocation RParenLoc); 2497 2498 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2499 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2500 SourceLocation AtLoc, 2501 SourceLocation ProtoLoc, 2502 SourceLocation LParenLoc, 2503 SourceLocation RParenLoc); 2504 2505 //===--------------------------------------------------------------------===// 2506 // C++ Declarations 2507 // 2508 Decl *ActOnStartLinkageSpecification(Scope *S, 2509 SourceLocation ExternLoc, 2510 SourceLocation LangLoc, 2511 llvm::StringRef Lang, 2512 SourceLocation LBraceLoc); 2513 Decl *ActOnFinishLinkageSpecification(Scope *S, 2514 Decl *LinkageSpec, 2515 SourceLocation RBraceLoc); 2516 2517 2518 //===--------------------------------------------------------------------===// 2519 // C++ Classes 2520 // 2521 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2522 const CXXScopeSpec *SS = 0); 2523 2524 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2525 SourceLocation ASLoc, 2526 SourceLocation ColonLoc); 2527 2528 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2529 Declarator &D, 2530 MultiTemplateParamsArg TemplateParameterLists, 2531 Expr *BitfieldWidth, 2532 Expr *Init, bool IsDefinition, 2533 bool Deleted = false); 2534 2535 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2536 Scope *S, 2537 CXXScopeSpec &SS, 2538 IdentifierInfo *MemberOrBase, 2539 ParsedType TemplateTypeTy, 2540 SourceLocation IdLoc, 2541 SourceLocation LParenLoc, 2542 Expr **Args, unsigned NumArgs, 2543 SourceLocation RParenLoc); 2544 2545 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2546 unsigned NumArgs, SourceLocation IdLoc, 2547 SourceLocation LParenLoc, 2548 SourceLocation RParenLoc); 2549 2550 MemInitResult BuildBaseInitializer(QualType BaseType, 2551 TypeSourceInfo *BaseTInfo, 2552 Expr **Args, unsigned NumArgs, 2553 SourceLocation LParenLoc, 2554 SourceLocation RParenLoc, 2555 CXXRecordDecl *ClassDecl); 2556 2557 bool SetBaseOrMemberInitializers(CXXConstructorDecl *Constructor, 2558 CXXBaseOrMemberInitializer **Initializers, 2559 unsigned NumInitializers, bool AnyErrors); 2560 2561 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2562 2563 2564 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2565 /// mark all the non-trivial destructors of its members and bases as 2566 /// referenced. 2567 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2568 CXXRecordDecl *Record); 2569 2570 /// \brief The list of classes whose vtables have been used within 2571 /// this translation unit, and the source locations at which the 2572 /// first use occurred. 2573 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2574 2575 /// \brief The list of vtables that are required but have not yet been 2576 /// materialized. 2577 llvm::SmallVector<VTableUse, 16> VTableUses; 2578 2579 /// \brief The set of classes whose vtables have been used within 2580 /// this translation unit, and a bit that will be true if the vtable is 2581 /// required to be emitted (otherwise, it should be emitted only if needed 2582 /// by code generation). 2583 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2584 2585 /// \brief A list of all of the dynamic classes in this translation 2586 /// unit. 2587 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2588 2589 /// \brief Note that the vtable for the given class was used at the 2590 /// given location. 2591 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2592 bool DefinitionRequired = false); 2593 2594 /// MarkVirtualMembersReferenced - Will mark all members of the given 2595 /// CXXRecordDecl referenced. 2596 void MarkVirtualMembersReferenced(SourceLocation Loc, 2597 const CXXRecordDecl *RD); 2598 2599 /// \brief Define all of the vtables that have been used in this 2600 /// translation unit and reference any virtual members used by those 2601 /// vtables. 2602 /// 2603 /// \returns true if any work was done, false otherwise. 2604 bool DefineUsedVTables(); 2605 2606 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2607 2608 void ActOnMemInitializers(Decl *ConstructorDecl, 2609 SourceLocation ColonLoc, 2610 MemInitTy **MemInits, unsigned NumMemInits, 2611 bool AnyErrors); 2612 2613 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2614 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2615 Decl *TagDecl, 2616 SourceLocation LBrac, 2617 SourceLocation RBrac, 2618 AttributeList *AttrList); 2619 2620 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2621 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2622 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2623 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2624 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2625 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2626 2627 Decl *ActOnStaticAssertDeclaration(SourceLocation AssertLoc, 2628 Expr *AssertExpr, 2629 Expr *AssertMessageExpr); 2630 2631 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2632 TypeSourceInfo *TSInfo); 2633 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2634 MultiTemplateParamsArg TemplateParams); 2635 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2636 MultiTemplateParamsArg TemplateParams); 2637 2638 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2639 StorageClass& SC); 2640 void CheckConstructor(CXXConstructorDecl *Constructor); 2641 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2642 StorageClass& SC); 2643 bool CheckDestructor(CXXDestructorDecl *Destructor); 2644 void CheckConversionDeclarator(Declarator &D, QualType &R, 2645 StorageClass& SC); 2646 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2647 2648 //===--------------------------------------------------------------------===// 2649 // C++ Derived Classes 2650 // 2651 2652 /// ActOnBaseSpecifier - Parsed a base specifier 2653 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2654 SourceRange SpecifierRange, 2655 bool Virtual, AccessSpecifier Access, 2656 TypeSourceInfo *TInfo); 2657 2658 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2659 SourceRange SpecifierRange, 2660 bool Virtual, AccessSpecifier Access, 2661 ParsedType basetype, SourceLocation 2662 BaseLoc); 2663 2664 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2665 unsigned NumBases); 2666 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 2667 2668 bool IsDerivedFrom(QualType Derived, QualType Base); 2669 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 2670 2671 // FIXME: I don't like this name. 2672 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 2673 2674 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 2675 2676 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2677 SourceLocation Loc, SourceRange Range, 2678 CXXCastPath *BasePath = 0, 2679 bool IgnoreAccess = false); 2680 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2681 unsigned InaccessibleBaseID, 2682 unsigned AmbigiousBaseConvID, 2683 SourceLocation Loc, SourceRange Range, 2684 DeclarationName Name, 2685 CXXCastPath *BasePath); 2686 2687 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 2688 2689 /// CheckOverridingFunctionReturnType - Checks whether the return types are 2690 /// covariant, according to C++ [class.virtual]p5. 2691 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 2692 const CXXMethodDecl *Old); 2693 2694 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 2695 /// spec is a subset of base spec. 2696 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 2697 const CXXMethodDecl *Old); 2698 2699 /// CheckOverridingFunctionAttributes - Checks whether attributes are 2700 /// incompatible or prevent overriding. 2701 bool CheckOverridingFunctionAttributes(const CXXMethodDecl *New, 2702 const CXXMethodDecl *Old); 2703 2704 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 2705 2706 //===--------------------------------------------------------------------===// 2707 // C++ Access Control 2708 // 2709 2710 enum AccessResult { 2711 AR_accessible, 2712 AR_inaccessible, 2713 AR_dependent, 2714 AR_delayed 2715 }; 2716 2717 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 2718 NamedDecl *PrevMemberDecl, 2719 AccessSpecifier LexicalAS); 2720 2721 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 2722 DeclAccessPair FoundDecl); 2723 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 2724 DeclAccessPair FoundDecl); 2725 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 2726 SourceRange PlacementRange, 2727 CXXRecordDecl *NamingClass, 2728 DeclAccessPair FoundDecl); 2729 AccessResult CheckConstructorAccess(SourceLocation Loc, 2730 CXXConstructorDecl *D, 2731 const InitializedEntity &Entity, 2732 AccessSpecifier Access, 2733 bool IsCopyBindingRefToTemp = false); 2734 AccessResult CheckDestructorAccess(SourceLocation Loc, 2735 CXXDestructorDecl *Dtor, 2736 const PartialDiagnostic &PDiag); 2737 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 2738 NamedDecl *D, 2739 const PartialDiagnostic &PDiag); 2740 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 2741 Expr *ObjectExpr, 2742 Expr *ArgExpr, 2743 DeclAccessPair FoundDecl); 2744 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 2745 DeclAccessPair FoundDecl); 2746 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 2747 QualType Base, QualType Derived, 2748 const CXXBasePath &Path, 2749 unsigned DiagID, 2750 bool ForceCheck = false, 2751 bool ForceUnprivileged = false); 2752 void CheckLookupAccess(const LookupResult &R); 2753 2754 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 2755 const MultiLevelTemplateArgumentList &TemplateArgs); 2756 void PerformDependentDiagnostics(const DeclContext *Pattern, 2757 const MultiLevelTemplateArgumentList &TemplateArgs); 2758 2759 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2760 2761 /// A flag to suppress access checking. 2762 bool SuppressAccessChecking; 2763 2764 void ActOnStartSuppressingAccessChecks(); 2765 void ActOnStopSuppressingAccessChecks(); 2766 2767 enum AbstractDiagSelID { 2768 AbstractNone = -1, 2769 AbstractReturnType, 2770 AbstractParamType, 2771 AbstractVariableType, 2772 AbstractFieldType, 2773 AbstractArrayType 2774 }; 2775 2776 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 2777 const PartialDiagnostic &PD); 2778 void DiagnoseAbstractType(const CXXRecordDecl *RD); 2779 2780 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 2781 AbstractDiagSelID SelID = AbstractNone); 2782 2783 //===--------------------------------------------------------------------===// 2784 // C++ Overloaded Operators [C++ 13.5] 2785 // 2786 2787 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 2788 2789 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 2790 2791 //===--------------------------------------------------------------------===// 2792 // C++ Templates [C++ 14] 2793 // 2794 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 2795 QualType ObjectType, bool EnteringContext, 2796 bool &MemberOfUnknownSpecialization); 2797 2798 TemplateNameKind isTemplateName(Scope *S, 2799 CXXScopeSpec &SS, 2800 bool hasTemplateKeyword, 2801 UnqualifiedId &Name, 2802 ParsedType ObjectType, 2803 bool EnteringContext, 2804 TemplateTy &Template, 2805 bool &MemberOfUnknownSpecialization); 2806 2807 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 2808 SourceLocation IILoc, 2809 Scope *S, 2810 const CXXScopeSpec *SS, 2811 TemplateTy &SuggestedTemplate, 2812 TemplateNameKind &SuggestedKind); 2813 2814 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 2815 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 2816 2817 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 2818 SourceLocation EllipsisLoc, 2819 SourceLocation KeyLoc, 2820 IdentifierInfo *ParamName, 2821 SourceLocation ParamNameLoc, 2822 unsigned Depth, unsigned Position, 2823 SourceLocation EqualLoc, 2824 ParsedType DefaultArg); 2825 2826 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 2827 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 2828 unsigned Depth, 2829 unsigned Position, 2830 SourceLocation EqualLoc, 2831 Expr *DefaultArg); 2832 Decl *ActOnTemplateTemplateParameter(Scope *S, 2833 SourceLocation TmpLoc, 2834 TemplateParamsTy *Params, 2835 IdentifierInfo *ParamName, 2836 SourceLocation ParamNameLoc, 2837 unsigned Depth, 2838 unsigned Position, 2839 SourceLocation EqualLoc, 2840 const ParsedTemplateArgument &DefaultArg); 2841 2842 TemplateParamsTy * 2843 ActOnTemplateParameterList(unsigned Depth, 2844 SourceLocation ExportLoc, 2845 SourceLocation TemplateLoc, 2846 SourceLocation LAngleLoc, 2847 Decl **Params, unsigned NumParams, 2848 SourceLocation RAngleLoc); 2849 2850 /// \brief The context in which we are checking a template parameter 2851 /// list. 2852 enum TemplateParamListContext { 2853 TPC_ClassTemplate, 2854 TPC_FunctionTemplate, 2855 TPC_ClassTemplateMember, 2856 TPC_FriendFunctionTemplate 2857 }; 2858 2859 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 2860 TemplateParameterList *OldParams, 2861 TemplateParamListContext TPC); 2862 TemplateParameterList * 2863 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 2864 const CXXScopeSpec &SS, 2865 TemplateParameterList **ParamLists, 2866 unsigned NumParamLists, 2867 bool IsFriend, 2868 bool &IsExplicitSpecialization, 2869 bool &Invalid); 2870 2871 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 2872 SourceLocation KWLoc, CXXScopeSpec &SS, 2873 IdentifierInfo *Name, SourceLocation NameLoc, 2874 AttributeList *Attr, 2875 TemplateParameterList *TemplateParams, 2876 AccessSpecifier AS); 2877 2878 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 2879 TemplateArgumentListInfo &Out); 2880 2881 QualType CheckTemplateIdType(TemplateName Template, 2882 SourceLocation TemplateLoc, 2883 const TemplateArgumentListInfo &TemplateArgs); 2884 2885 TypeResult 2886 ActOnTemplateIdType(TemplateTy Template, SourceLocation TemplateLoc, 2887 SourceLocation LAngleLoc, 2888 ASTTemplateArgsPtr TemplateArgs, 2889 SourceLocation RAngleLoc); 2890 2891 TypeResult ActOnTagTemplateIdType(CXXScopeSpec &SS, 2892 TypeResult Type, 2893 TagUseKind TUK, 2894 TypeSpecifierType TagSpec, 2895 SourceLocation TagLoc); 2896 2897 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 2898 LookupResult &R, 2899 bool RequiresADL, 2900 const TemplateArgumentListInfo &TemplateArgs); 2901 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 2902 const DeclarationNameInfo &NameInfo, 2903 const TemplateArgumentListInfo &TemplateArgs); 2904 2905 TemplateNameKind ActOnDependentTemplateName(Scope *S, 2906 SourceLocation TemplateKWLoc, 2907 CXXScopeSpec &SS, 2908 UnqualifiedId &Name, 2909 ParsedType ObjectType, 2910 bool EnteringContext, 2911 TemplateTy &Template); 2912 2913 bool CheckClassTemplatePartialSpecializationArgs( 2914 TemplateParameterList *TemplateParams, 2915 llvm::SmallVectorImpl<TemplateArgument> &TemplateArgs); 2916 2917 DeclResult 2918 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 2919 SourceLocation KWLoc, 2920 CXXScopeSpec &SS, 2921 TemplateTy Template, 2922 SourceLocation TemplateNameLoc, 2923 SourceLocation LAngleLoc, 2924 ASTTemplateArgsPtr TemplateArgs, 2925 SourceLocation RAngleLoc, 2926 AttributeList *Attr, 2927 MultiTemplateParamsArg TemplateParameterLists); 2928 2929 Decl *ActOnTemplateDeclarator(Scope *S, 2930 MultiTemplateParamsArg TemplateParameterLists, 2931 Declarator &D); 2932 2933 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 2934 MultiTemplateParamsArg TemplateParameterLists, 2935 Declarator &D); 2936 2937 bool 2938 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 2939 TemplateSpecializationKind NewTSK, 2940 NamedDecl *PrevDecl, 2941 TemplateSpecializationKind PrevTSK, 2942 SourceLocation PrevPtOfInstantiation, 2943 bool &SuppressNew); 2944 2945 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 2946 const TemplateArgumentListInfo &ExplicitTemplateArgs, 2947 LookupResult &Previous); 2948 2949 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 2950 const TemplateArgumentListInfo *ExplicitTemplateArgs, 2951 LookupResult &Previous); 2952 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 2953 2954 DeclResult 2955 ActOnExplicitInstantiation(Scope *S, 2956 SourceLocation ExternLoc, 2957 SourceLocation TemplateLoc, 2958 unsigned TagSpec, 2959 SourceLocation KWLoc, 2960 const CXXScopeSpec &SS, 2961 TemplateTy Template, 2962 SourceLocation TemplateNameLoc, 2963 SourceLocation LAngleLoc, 2964 ASTTemplateArgsPtr TemplateArgs, 2965 SourceLocation RAngleLoc, 2966 AttributeList *Attr); 2967 2968 DeclResult 2969 ActOnExplicitInstantiation(Scope *S, 2970 SourceLocation ExternLoc, 2971 SourceLocation TemplateLoc, 2972 unsigned TagSpec, 2973 SourceLocation KWLoc, 2974 CXXScopeSpec &SS, 2975 IdentifierInfo *Name, 2976 SourceLocation NameLoc, 2977 AttributeList *Attr); 2978 2979 DeclResult ActOnExplicitInstantiation(Scope *S, 2980 SourceLocation ExternLoc, 2981 SourceLocation TemplateLoc, 2982 Declarator &D); 2983 2984 TemplateArgumentLoc 2985 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 2986 SourceLocation TemplateLoc, 2987 SourceLocation RAngleLoc, 2988 Decl *Param, 2989 llvm::SmallVectorImpl<TemplateArgument> &Converted); 2990 2991 /// \brief Specifies the context in which a particular template 2992 /// argument is being checked. 2993 enum CheckTemplateArgumentKind { 2994 /// \brief The template argument was specified in the code or was 2995 /// instantiated with some deduced template arguments. 2996 CTAK_Specified, 2997 2998 /// \brief The template argument was deduced via template argument 2999 /// deduction. 3000 CTAK_Deduced, 3001 3002 /// \brief The template argument was deduced from an array bound 3003 /// via template argument deduction. 3004 CTAK_DeducedFromArrayBound 3005 }; 3006 3007 bool CheckTemplateArgument(NamedDecl *Param, 3008 const TemplateArgumentLoc &Arg, 3009 TemplateDecl *Template, 3010 SourceLocation TemplateLoc, 3011 SourceLocation RAngleLoc, 3012 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3013 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3014 3015 bool CheckTemplateArgumentList(TemplateDecl *Template, 3016 SourceLocation TemplateLoc, 3017 const TemplateArgumentListInfo &TemplateArgs, 3018 bool PartialTemplateArgs, 3019 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3020 3021 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3022 const TemplateArgumentLoc &Arg, 3023 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3024 3025 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3026 TypeSourceInfo *Arg); 3027 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3028 TemplateArgument &Converted); 3029 bool CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3030 QualType InstantiatedParamType, Expr *&Arg, 3031 TemplateArgument &Converted, 3032 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3033 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3034 const TemplateArgumentLoc &Arg); 3035 3036 ExprResult 3037 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3038 QualType ParamType, 3039 SourceLocation Loc); 3040 ExprResult 3041 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3042 SourceLocation Loc); 3043 3044 /// \brief Enumeration describing how template parameter lists are compared 3045 /// for equality. 3046 enum TemplateParameterListEqualKind { 3047 /// \brief We are matching the template parameter lists of two templates 3048 /// that might be redeclarations. 3049 /// 3050 /// \code 3051 /// template<typename T> struct X; 3052 /// template<typename T> struct X; 3053 /// \endcode 3054 TPL_TemplateMatch, 3055 3056 /// \brief We are matching the template parameter lists of two template 3057 /// template parameters as part of matching the template parameter lists 3058 /// of two templates that might be redeclarations. 3059 /// 3060 /// \code 3061 /// template<template<int I> class TT> struct X; 3062 /// template<template<int Value> class Other> struct X; 3063 /// \endcode 3064 TPL_TemplateTemplateParmMatch, 3065 3066 /// \brief We are matching the template parameter lists of a template 3067 /// template argument against the template parameter lists of a template 3068 /// template parameter. 3069 /// 3070 /// \code 3071 /// template<template<int Value> class Metafun> struct X; 3072 /// template<int Value> struct integer_c; 3073 /// X<integer_c> xic; 3074 /// \endcode 3075 TPL_TemplateTemplateArgumentMatch 3076 }; 3077 3078 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3079 TemplateParameterList *Old, 3080 bool Complain, 3081 TemplateParameterListEqualKind Kind, 3082 SourceLocation TemplateArgLoc 3083 = SourceLocation()); 3084 3085 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3086 3087 /// \brief Called when the parser has parsed a C++ typename 3088 /// specifier, e.g., "typename T::type". 3089 /// 3090 /// \param S The scope in which this typename type occurs. 3091 /// \param TypenameLoc the location of the 'typename' keyword 3092 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3093 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3094 /// \param IdLoc the location of the identifier. 3095 TypeResult 3096 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3097 const CXXScopeSpec &SS, const IdentifierInfo &II, 3098 SourceLocation IdLoc); 3099 3100 /// \brief Called when the parser has parsed a C++ typename 3101 /// specifier that ends in a template-id, e.g., 3102 /// "typename MetaFun::template apply<T1, T2>". 3103 /// 3104 /// \param S The scope in which this typename type occurs. 3105 /// \param TypenameLoc the location of the 'typename' keyword 3106 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3107 /// \param TemplateLoc the location of the 'template' keyword, if any. 3108 /// \param Ty the type that the typename specifier refers to. 3109 TypeResult 3110 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3111 const CXXScopeSpec &SS, SourceLocation TemplateLoc, 3112 ParsedType Ty); 3113 3114 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3115 NestedNameSpecifier *NNS, 3116 const IdentifierInfo &II, 3117 SourceLocation KeywordLoc, 3118 SourceRange NNSRange, 3119 SourceLocation IILoc); 3120 3121 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3122 SourceLocation Loc, 3123 DeclarationName Name); 3124 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3125 3126 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3127 3128 std::string 3129 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3130 const TemplateArgumentList &Args); 3131 3132 std::string 3133 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3134 const TemplateArgument *Args, 3135 unsigned NumArgs); 3136 3137 //===--------------------------------------------------------------------===// 3138 // C++ Variadic Templates (C++0x [temp.variadic]) 3139 //===--------------------------------------------------------------------===// 3140 3141 /// \brief The context in which an unexpanded parameter pack is 3142 /// being diagnosed. 3143 /// 3144 /// Note that the values of this enumeration line up with the first 3145 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3146 enum UnexpandedParameterPackContext { 3147 /// \brief An arbitrary expression. 3148 UPPC_Expression = 0, 3149 3150 /// \brief The base type of a class type. 3151 UPPC_BaseType, 3152 3153 /// \brief The type of an arbitrary declaration. 3154 UPPC_DeclarationType, 3155 3156 /// \brief The type of a data member. 3157 UPPC_DataMemberType, 3158 3159 /// \brief The size of a bit-field. 3160 UPPC_BitFieldWidth, 3161 3162 /// \brief The expression in a static assertion. 3163 UPPC_StaticAssertExpression, 3164 3165 /// \brief The fixed underlying type of an enumeration. 3166 UPPC_FixedUnderlyingType, 3167 3168 /// \brief The enumerator value. 3169 UPPC_EnumeratorValue, 3170 3171 /// \brief A using declaration. 3172 UPPC_UsingDeclaration, 3173 3174 /// \brief A friend declaration. 3175 UPPC_FriendDeclaration, 3176 3177 /// \brief A declaration qualifier. 3178 UPPC_DeclarationQualifier, 3179 3180 /// \brief An initializer. 3181 UPPC_Initializer, 3182 3183 /// \brief A default argument. 3184 UPPC_DefaultArgument, 3185 3186 /// \brief The type of a non-type template parameter. 3187 UPPC_NonTypeTemplateParameterType, 3188 3189 /// \brief The type of an exception. 3190 UPPC_ExceptionType, 3191 3192 /// \brief Partial specialization. 3193 UPPC_PartialSpecialization 3194 }; 3195 3196 /// \brief If the given type contains an unexpanded parameter pack, 3197 /// diagnose the error. 3198 /// 3199 /// \param Loc The source location where a diagnostc should be emitted. 3200 /// 3201 /// \param T The type that is being checked for unexpanded parameter 3202 /// packs. 3203 /// 3204 /// \returns true if an error ocurred, false otherwise. 3205 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3206 UnexpandedParameterPackContext UPPC); 3207 3208 /// \brief If the given expression contains an unexpanded parameter 3209 /// pack, diagnose the error. 3210 /// 3211 /// \param E The expression that is being checked for unexpanded 3212 /// parameter packs. 3213 /// 3214 /// \returns true if an error ocurred, false otherwise. 3215 bool DiagnoseUnexpandedParameterPack(Expr *E, 3216 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3217 3218 /// \brief If the given nested-name-specifier contains an unexpanded 3219 /// parameter pack, diagnose the error. 3220 /// 3221 /// \param SS The nested-name-specifier that is being checked for 3222 /// unexpanded parameter packs. 3223 /// 3224 /// \returns true if an error ocurred, false otherwise. 3225 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3226 UnexpandedParameterPackContext UPPC); 3227 3228 /// \brief If the given name contains an unexpanded parameter pack, 3229 /// diagnose the error. 3230 /// 3231 /// \param NameInfo The name (with source location information) that 3232 /// is being checked for unexpanded parameter packs. 3233 /// 3234 /// \returns true if an error ocurred, false otherwise. 3235 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3236 UnexpandedParameterPackContext UPPC); 3237 3238 /// \brief If the given template name contains an unexpanded parameter pack, 3239 /// diagnose the error. 3240 /// 3241 /// \param Loc The location of the template name. 3242 /// 3243 /// \param Template The template name that is being checked for unexpanded 3244 /// parameter packs. 3245 /// 3246 /// \returns true if an error ocurred, false otherwise. 3247 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3248 TemplateName Template, 3249 UnexpandedParameterPackContext UPPC); 3250 3251 /// \brief If the given template argument contains an unexpanded parameter 3252 /// pack, diagnose the error. 3253 /// 3254 /// \param Arg The template argument that is being checked for unexpanded 3255 /// parameter packs. 3256 /// 3257 /// \returns true if an error ocurred, false otherwise. 3258 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3259 UnexpandedParameterPackContext UPPC); 3260 3261 /// \brief Collect the set of unexpanded parameter packs within the given 3262 /// template argument. 3263 /// 3264 /// \param Arg The template argument that will be traversed to find 3265 /// unexpanded parameter packs. 3266 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3267 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3268 3269 /// \brief Collect the set of unexpanded parameter packs within the given 3270 /// template argument. 3271 /// 3272 /// \param Arg The template argument that will be traversed to find 3273 /// unexpanded parameter packs. 3274 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3275 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3276 3277 /// \brief Collect the set of unexpanded parameter packs within the given 3278 /// type. 3279 /// 3280 /// \param Arg The template argument that will be traversed to find 3281 /// unexpanded parameter packs. 3282 void collectUnexpandedParameterPacks(QualType T, 3283 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3284 3285 /// \brief Invoked when parsing a template argument followed by an 3286 /// ellipsis, which creates a pack expansion. 3287 /// 3288 /// \param Arg The template argument preceding the ellipsis, which 3289 /// may already be invalid. 3290 /// 3291 /// \param EllipsisLoc The location of the ellipsis. 3292 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3293 SourceLocation EllipsisLoc); 3294 3295 /// \brief Invoked when parsing a type followed by an ellipsis, which 3296 /// creates a pack expansion. 3297 /// 3298 /// \param Type The type preceding the ellipsis, which will become 3299 /// the pattern of the pack expansion. 3300 /// 3301 /// \param EllipsisLoc The location of the ellipsis. 3302 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3303 3304 /// \brief Construct a pack expansion type from the pattern of the pack 3305 /// expansion. 3306 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3307 SourceLocation EllipsisLoc); 3308 3309 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3310 /// creates a pack expansion. 3311 /// 3312 /// \param Pattern The expression preceding the ellipsis, which will become 3313 /// the pattern of the pack expansion. 3314 /// 3315 /// \param EllipsisLoc The location of the ellipsis. 3316 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3317 3318 /// \brief Determine whether we could expand a pack expansion with the 3319 /// given set of parameter packs into separate arguments by repeatedly 3320 /// transforming the pattern. 3321 /// 3322 /// \param EllipsisLoc The location of the ellipsis that identifies the 3323 /// pack expansion. 3324 /// 3325 /// \param PatternRange The source range that covers the entire pattern of 3326 /// the pack expansion. 3327 /// 3328 /// \param Unexpanded The set of unexpanded parameter packs within the 3329 /// pattern. 3330 /// 3331 /// \param NumUnexpanded The number of unexpanded parameter packs in 3332 /// \p Unexpanded. 3333 /// 3334 /// \param ShouldExpand Will be set to \c true if the transformer should 3335 /// expand the corresponding pack expansions into separate arguments. When 3336 /// set, \c NumExpansions must also be set. 3337 /// 3338 /// \param NumExpansions The number of separate arguments that will be in 3339 /// the expanded form of the corresponding pack expansion. Must be set when 3340 /// \c ShouldExpand is \c true. 3341 /// 3342 /// \returns true if an error occurred (e.g., because the parameter packs 3343 /// are to be instantiated with arguments of different lengths), false 3344 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3345 /// must be set. 3346 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3347 SourceRange PatternRange, 3348 const UnexpandedParameterPack *Unexpanded, 3349 unsigned NumUnexpanded, 3350 const MultiLevelTemplateArgumentList &TemplateArgs, 3351 bool &ShouldExpand, 3352 unsigned &NumExpansions); 3353 3354 /// \brief Determine whether the given declarator contains any unexpanded 3355 /// parameter packs. 3356 /// 3357 /// This routine is used by the parser to disambiguate function declarators 3358 /// with an ellipsis prior to the ')', e.g., 3359 /// 3360 /// \code 3361 /// void f(T...); 3362 /// \endcode 3363 /// 3364 /// To determine whether we have an (unnamed) function parameter pack or 3365 /// a variadic function. 3366 /// 3367 /// \returns true if the declarator contains any unexpanded parameter packs, 3368 /// false otherwise. 3369 bool containsUnexpandedParameterPacks(Declarator &D); 3370 3371 //===--------------------------------------------------------------------===// 3372 // C++ Template Argument Deduction (C++ [temp.deduct]) 3373 //===--------------------------------------------------------------------===// 3374 3375 /// \brief Describes the result of template argument deduction. 3376 /// 3377 /// The TemplateDeductionResult enumeration describes the result of 3378 /// template argument deduction, as returned from 3379 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3380 /// structure provides additional information about the results of 3381 /// template argument deduction, e.g., the deduced template argument 3382 /// list (if successful) or the specific template parameters or 3383 /// deduced arguments that were involved in the failure. 3384 enum TemplateDeductionResult { 3385 /// \brief Template argument deduction was successful. 3386 TDK_Success = 0, 3387 /// \brief Template argument deduction exceeded the maximum template 3388 /// instantiation depth (which has already been diagnosed). 3389 TDK_InstantiationDepth, 3390 /// \brief Template argument deduction did not deduce a value 3391 /// for every template parameter. 3392 TDK_Incomplete, 3393 /// \brief Template argument deduction produced inconsistent 3394 /// deduced values for the given template parameter. 3395 TDK_Inconsistent, 3396 /// \brief Template argument deduction failed due to inconsistent 3397 /// cv-qualifiers on a template parameter type that would 3398 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3399 /// but were given a non-const "X". 3400 TDK_Underqualified, 3401 /// \brief Substitution of the deduced template argument values 3402 /// resulted in an error. 3403 TDK_SubstitutionFailure, 3404 /// \brief Substitution of the deduced template argument values 3405 /// into a non-deduced context produced a type or value that 3406 /// produces a type that does not match the original template 3407 /// arguments provided. 3408 TDK_NonDeducedMismatch, 3409 /// \brief When performing template argument deduction for a function 3410 /// template, there were too many call arguments. 3411 TDK_TooManyArguments, 3412 /// \brief When performing template argument deduction for a function 3413 /// template, there were too few call arguments. 3414 TDK_TooFewArguments, 3415 /// \brief The explicitly-specified template arguments were not valid 3416 /// template arguments for the given template. 3417 TDK_InvalidExplicitArguments, 3418 /// \brief The arguments included an overloaded function name that could 3419 /// not be resolved to a suitable function. 3420 TDK_FailedOverloadResolution 3421 }; 3422 3423 TemplateDeductionResult 3424 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3425 const TemplateArgumentList &TemplateArgs, 3426 sema::TemplateDeductionInfo &Info); 3427 3428 TemplateDeductionResult 3429 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3430 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3431 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3432 llvm::SmallVectorImpl<QualType> &ParamTypes, 3433 QualType *FunctionType, 3434 sema::TemplateDeductionInfo &Info); 3435 3436 TemplateDeductionResult 3437 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3438 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3439 unsigned NumExplicitlySpecified, 3440 FunctionDecl *&Specialization, 3441 sema::TemplateDeductionInfo &Info); 3442 3443 TemplateDeductionResult 3444 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3445 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3446 Expr **Args, unsigned NumArgs, 3447 FunctionDecl *&Specialization, 3448 sema::TemplateDeductionInfo &Info); 3449 3450 TemplateDeductionResult 3451 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3452 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3453 QualType ArgFunctionType, 3454 FunctionDecl *&Specialization, 3455 sema::TemplateDeductionInfo &Info); 3456 3457 TemplateDeductionResult 3458 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3459 QualType ToType, 3460 CXXConversionDecl *&Specialization, 3461 sema::TemplateDeductionInfo &Info); 3462 3463 TemplateDeductionResult 3464 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3465 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3466 FunctionDecl *&Specialization, 3467 sema::TemplateDeductionInfo &Info); 3468 3469 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3470 FunctionTemplateDecl *FT2, 3471 SourceLocation Loc, 3472 TemplatePartialOrderingContext TPOC); 3473 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3474 UnresolvedSetIterator SEnd, 3475 TemplatePartialOrderingContext TPOC, 3476 SourceLocation Loc, 3477 const PartialDiagnostic &NoneDiag, 3478 const PartialDiagnostic &AmbigDiag, 3479 const PartialDiagnostic &CandidateDiag); 3480 3481 ClassTemplatePartialSpecializationDecl * 3482 getMoreSpecializedPartialSpecialization( 3483 ClassTemplatePartialSpecializationDecl *PS1, 3484 ClassTemplatePartialSpecializationDecl *PS2, 3485 SourceLocation Loc); 3486 3487 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3488 bool OnlyDeduced, 3489 unsigned Depth, 3490 llvm::SmallVectorImpl<bool> &Used); 3491 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3492 llvm::SmallVectorImpl<bool> &Deduced); 3493 3494 //===--------------------------------------------------------------------===// 3495 // C++ Template Instantiation 3496 // 3497 3498 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3499 const TemplateArgumentList *Innermost = 0, 3500 bool RelativeToPrimary = false, 3501 const FunctionDecl *Pattern = 0); 3502 3503 /// \brief A template instantiation that is currently in progress. 3504 struct ActiveTemplateInstantiation { 3505 /// \brief The kind of template instantiation we are performing 3506 enum InstantiationKind { 3507 /// We are instantiating a template declaration. The entity is 3508 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3509 TemplateInstantiation, 3510 3511 /// We are instantiating a default argument for a template 3512 /// parameter. The Entity is the template, and 3513 /// TemplateArgs/NumTemplateArguments provides the template 3514 /// arguments as specified. 3515 /// FIXME: Use a TemplateArgumentList 3516 DefaultTemplateArgumentInstantiation, 3517 3518 /// We are instantiating a default argument for a function. 3519 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3520 /// provides the template arguments as specified. 3521 DefaultFunctionArgumentInstantiation, 3522 3523 /// We are substituting explicit template arguments provided for 3524 /// a function template. The entity is a FunctionTemplateDecl. 3525 ExplicitTemplateArgumentSubstitution, 3526 3527 /// We are substituting template argument determined as part of 3528 /// template argument deduction for either a class template 3529 /// partial specialization or a function template. The 3530 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3531 /// a FunctionTemplateDecl. 3532 DeducedTemplateArgumentSubstitution, 3533 3534 /// We are substituting prior template arguments into a new 3535 /// template parameter. The template parameter itself is either a 3536 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3537 PriorTemplateArgumentSubstitution, 3538 3539 /// We are checking the validity of a default template argument that 3540 /// has been used when naming a template-id. 3541 DefaultTemplateArgumentChecking 3542 } Kind; 3543 3544 /// \brief The point of instantiation within the source code. 3545 SourceLocation PointOfInstantiation; 3546 3547 /// \brief The template in which we are performing the instantiation, 3548 /// for substitutions of prior template arguments. 3549 TemplateDecl *Template; 3550 3551 /// \brief The entity that is being instantiated. 3552 uintptr_t Entity; 3553 3554 /// \brief The list of template arguments we are substituting, if they 3555 /// are not part of the entity. 3556 const TemplateArgument *TemplateArgs; 3557 3558 /// \brief The number of template arguments in TemplateArgs. 3559 unsigned NumTemplateArgs; 3560 3561 /// \brief The template deduction info object associated with the 3562 /// substitution or checking of explicit or deduced template arguments. 3563 sema::TemplateDeductionInfo *DeductionInfo; 3564 3565 /// \brief The source range that covers the construct that cause 3566 /// the instantiation, e.g., the template-id that causes a class 3567 /// template instantiation. 3568 SourceRange InstantiationRange; 3569 3570 ActiveTemplateInstantiation() 3571 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 3572 NumTemplateArgs(0), DeductionInfo(0) {} 3573 3574 /// \brief Determines whether this template is an actual instantiation 3575 /// that should be counted toward the maximum instantiation depth. 3576 bool isInstantiationRecord() const; 3577 3578 friend bool operator==(const ActiveTemplateInstantiation &X, 3579 const ActiveTemplateInstantiation &Y) { 3580 if (X.Kind != Y.Kind) 3581 return false; 3582 3583 if (X.Entity != Y.Entity) 3584 return false; 3585 3586 switch (X.Kind) { 3587 case TemplateInstantiation: 3588 return true; 3589 3590 case PriorTemplateArgumentSubstitution: 3591 case DefaultTemplateArgumentChecking: 3592 if (X.Template != Y.Template) 3593 return false; 3594 3595 // Fall through 3596 3597 case DefaultTemplateArgumentInstantiation: 3598 case ExplicitTemplateArgumentSubstitution: 3599 case DeducedTemplateArgumentSubstitution: 3600 case DefaultFunctionArgumentInstantiation: 3601 return X.TemplateArgs == Y.TemplateArgs; 3602 3603 } 3604 3605 return true; 3606 } 3607 3608 friend bool operator!=(const ActiveTemplateInstantiation &X, 3609 const ActiveTemplateInstantiation &Y) { 3610 return !(X == Y); 3611 } 3612 }; 3613 3614 /// \brief List of active template instantiations. 3615 /// 3616 /// This vector is treated as a stack. As one template instantiation 3617 /// requires another template instantiation, additional 3618 /// instantiations are pushed onto the stack up to a 3619 /// user-configurable limit LangOptions::InstantiationDepth. 3620 llvm::SmallVector<ActiveTemplateInstantiation, 16> 3621 ActiveTemplateInstantiations; 3622 3623 /// \brief The number of ActiveTemplateInstantiation entries in 3624 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 3625 /// therefore, should not be counted as part of the instantiation depth. 3626 unsigned NonInstantiationEntries; 3627 3628 /// \brief The last template from which a template instantiation 3629 /// error or warning was produced. 3630 /// 3631 /// This value is used to suppress printing of redundant template 3632 /// instantiation backtraces when there are multiple errors in the 3633 /// same instantiation. FIXME: Does this belong in Sema? It's tough 3634 /// to implement it anywhere else. 3635 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 3636 3637 /// \brief The current index into pack expansion arguments that will be 3638 /// used for substitution of parameter packs. 3639 /// 3640 /// The pack expansion index will be -1 to indicate that parameter packs 3641 /// should be instantiated as themselves. Otherwise, the index specifies 3642 /// which argument within the parameter pack will be used for substitution. 3643 int ArgumentPackSubstitutionIndex; 3644 3645 /// \brief RAII object used to change the argument pack substitution index 3646 /// within a \c Sema object. 3647 /// 3648 /// See \c ArgumentPackSubstitutionIndex for more information. 3649 class ArgumentPackSubstitutionIndexRAII { 3650 Sema &Self; 3651 int OldSubstitutionIndex; 3652 3653 public: 3654 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 3655 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 3656 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 3657 } 3658 3659 ~ArgumentPackSubstitutionIndexRAII() { 3660 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 3661 } 3662 }; 3663 3664 friend class ArgumentPackSubstitutionRAII; 3665 3666 /// \brief The stack of calls expression undergoing template instantiation. 3667 /// 3668 /// The top of this stack is used by a fixit instantiating unresolved 3669 /// function calls to fix the AST to match the textual change it prints. 3670 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 3671 3672 /// \brief For each declaration that involved template argument deduction, the 3673 /// set of diagnostics that were suppressed during that template argument 3674 /// deduction. 3675 /// 3676 /// FIXME: Serialize this structure to the AST file. 3677 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 3678 SuppressedDiagnostics; 3679 3680 /// \brief A stack object to be created when performing template 3681 /// instantiation. 3682 /// 3683 /// Construction of an object of type \c InstantiatingTemplate 3684 /// pushes the current instantiation onto the stack of active 3685 /// instantiations. If the size of this stack exceeds the maximum 3686 /// number of recursive template instantiations, construction 3687 /// produces an error and evaluates true. 3688 /// 3689 /// Destruction of this object will pop the named instantiation off 3690 /// the stack. 3691 struct InstantiatingTemplate { 3692 /// \brief Note that we are instantiating a class template, 3693 /// function template, or a member thereof. 3694 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3695 Decl *Entity, 3696 SourceRange InstantiationRange = SourceRange()); 3697 3698 /// \brief Note that we are instantiating a default argument in a 3699 /// template-id. 3700 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3701 TemplateDecl *Template, 3702 const TemplateArgument *TemplateArgs, 3703 unsigned NumTemplateArgs, 3704 SourceRange InstantiationRange = SourceRange()); 3705 3706 /// \brief Note that we are instantiating a default argument in a 3707 /// template-id. 3708 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3709 FunctionTemplateDecl *FunctionTemplate, 3710 const TemplateArgument *TemplateArgs, 3711 unsigned NumTemplateArgs, 3712 ActiveTemplateInstantiation::InstantiationKind Kind, 3713 sema::TemplateDeductionInfo &DeductionInfo, 3714 SourceRange InstantiationRange = SourceRange()); 3715 3716 /// \brief Note that we are instantiating as part of template 3717 /// argument deduction for a class template partial 3718 /// specialization. 3719 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3720 ClassTemplatePartialSpecializationDecl *PartialSpec, 3721 const TemplateArgument *TemplateArgs, 3722 unsigned NumTemplateArgs, 3723 sema::TemplateDeductionInfo &DeductionInfo, 3724 SourceRange InstantiationRange = SourceRange()); 3725 3726 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3727 ParmVarDecl *Param, 3728 const TemplateArgument *TemplateArgs, 3729 unsigned NumTemplateArgs, 3730 SourceRange InstantiationRange = SourceRange()); 3731 3732 /// \brief Note that we are substituting prior template arguments into a 3733 /// non-type or template template parameter. 3734 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3735 TemplateDecl *Template, 3736 NonTypeTemplateParmDecl *Param, 3737 const TemplateArgument *TemplateArgs, 3738 unsigned NumTemplateArgs, 3739 SourceRange InstantiationRange); 3740 3741 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3742 TemplateDecl *Template, 3743 TemplateTemplateParmDecl *Param, 3744 const TemplateArgument *TemplateArgs, 3745 unsigned NumTemplateArgs, 3746 SourceRange InstantiationRange); 3747 3748 /// \brief Note that we are checking the default template argument 3749 /// against the template parameter for a given template-id. 3750 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 3751 TemplateDecl *Template, 3752 NamedDecl *Param, 3753 const TemplateArgument *TemplateArgs, 3754 unsigned NumTemplateArgs, 3755 SourceRange InstantiationRange); 3756 3757 3758 /// \brief Note that we have finished instantiating this template. 3759 void Clear(); 3760 3761 ~InstantiatingTemplate() { Clear(); } 3762 3763 /// \brief Determines whether we have exceeded the maximum 3764 /// recursive template instantiations. 3765 operator bool() const { return Invalid; } 3766 3767 private: 3768 Sema &SemaRef; 3769 bool Invalid; 3770 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 3771 SourceRange InstantiationRange); 3772 3773 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 3774 3775 InstantiatingTemplate& 3776 operator=(const InstantiatingTemplate&); // not implemented 3777 }; 3778 3779 void PrintInstantiationStack(); 3780 3781 /// \brief Determines whether we are currently in a context where 3782 /// template argument substitution failures are not considered 3783 /// errors. 3784 /// 3785 /// \returns The nearest template-deduction context object, if we are in a 3786 /// SFINAE context, which can be used to capture diagnostics that will be 3787 /// suppressed. Otherwise, returns NULL to indicate that we are not within a 3788 /// SFINAE context. 3789 sema::TemplateDeductionInfo *isSFINAEContext() const; 3790 3791 /// \brief RAII class used to determine whether SFINAE has 3792 /// trapped any errors that occur during template argument 3793 /// deduction. 3794 class SFINAETrap { 3795 Sema &SemaRef; 3796 unsigned PrevSFINAEErrors; 3797 public: 3798 explicit SFINAETrap(Sema &SemaRef) 3799 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors) { } 3800 3801 ~SFINAETrap() { SemaRef.NumSFINAEErrors = PrevSFINAEErrors; } 3802 3803 /// \brief Determine whether any SFINAE errors have been trapped. 3804 bool hasErrorOccurred() const { 3805 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 3806 } 3807 }; 3808 3809 /// \brief The current instantiation scope used to store local 3810 /// variables. 3811 LocalInstantiationScope *CurrentInstantiationScope; 3812 3813 /// \brief The number of typos corrected by CorrectTypo. 3814 unsigned TyposCorrected; 3815 3816 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 3817 UnqualifiedTyposCorrectedMap; 3818 3819 /// \brief A cache containing the results of typo correction for unqualified 3820 /// name lookup. 3821 /// 3822 /// The string is the string that we corrected to (which may be empty, if 3823 /// there was no correction), while the boolean will be true when the 3824 /// string represents a keyword. 3825 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 3826 3827 /// \brief Worker object for performing CFG-based warnings. 3828 sema::AnalysisBasedWarnings AnalysisWarnings; 3829 3830 /// \brief An entity for which implicit template instantiation is required. 3831 /// 3832 /// The source location associated with the declaration is the first place in 3833 /// the source code where the declaration was "used". It is not necessarily 3834 /// the point of instantiation (which will be either before or after the 3835 /// namespace-scope declaration that triggered this implicit instantiation), 3836 /// However, it is the location that diagnostics should generally refer to, 3837 /// because users will need to know what code triggered the instantiation. 3838 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 3839 3840 /// \brief The queue of implicit template instantiations that are required 3841 /// but have not yet been performed. 3842 std::deque<PendingImplicitInstantiation> PendingInstantiations; 3843 3844 /// \brief The queue of implicit template instantiations that are required 3845 /// and must be performed within the current local scope. 3846 /// 3847 /// This queue is only used for member functions of local classes in 3848 /// templates, which must be instantiated in the same scope as their 3849 /// enclosing function, so that they can reference function-local 3850 /// types, static variables, enumerators, etc. 3851 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 3852 3853 void PerformPendingInstantiations(bool LocalOnly = false); 3854 3855 TypeSourceInfo *SubstType(TypeSourceInfo *T, 3856 const MultiLevelTemplateArgumentList &TemplateArgs, 3857 SourceLocation Loc, DeclarationName Entity); 3858 3859 QualType SubstType(QualType T, 3860 const MultiLevelTemplateArgumentList &TemplateArgs, 3861 SourceLocation Loc, DeclarationName Entity); 3862 3863 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 3864 const MultiLevelTemplateArgumentList &TemplateArgs, 3865 SourceLocation Loc, 3866 DeclarationName Entity); 3867 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 3868 const MultiLevelTemplateArgumentList &TemplateArgs); 3869 ExprResult SubstExpr(Expr *E, 3870 const MultiLevelTemplateArgumentList &TemplateArgs); 3871 3872 StmtResult SubstStmt(Stmt *S, 3873 const MultiLevelTemplateArgumentList &TemplateArgs); 3874 3875 Decl *SubstDecl(Decl *D, DeclContext *Owner, 3876 const MultiLevelTemplateArgumentList &TemplateArgs); 3877 3878 bool 3879 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 3880 CXXRecordDecl *Pattern, 3881 const MultiLevelTemplateArgumentList &TemplateArgs); 3882 3883 bool 3884 InstantiateClass(SourceLocation PointOfInstantiation, 3885 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 3886 const MultiLevelTemplateArgumentList &TemplateArgs, 3887 TemplateSpecializationKind TSK, 3888 bool Complain = true); 3889 3890 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 3891 Decl *Pattern, Decl *Inst); 3892 3893 bool 3894 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 3895 ClassTemplateSpecializationDecl *ClassTemplateSpec, 3896 TemplateSpecializationKind TSK, 3897 bool Complain = true); 3898 3899 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 3900 CXXRecordDecl *Instantiation, 3901 const MultiLevelTemplateArgumentList &TemplateArgs, 3902 TemplateSpecializationKind TSK); 3903 3904 void InstantiateClassTemplateSpecializationMembers( 3905 SourceLocation PointOfInstantiation, 3906 ClassTemplateSpecializationDecl *ClassTemplateSpec, 3907 TemplateSpecializationKind TSK); 3908 3909 NestedNameSpecifier * 3910 SubstNestedNameSpecifier(NestedNameSpecifier *NNS, 3911 SourceRange Range, 3912 const MultiLevelTemplateArgumentList &TemplateArgs); 3913 DeclarationNameInfo 3914 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 3915 const MultiLevelTemplateArgumentList &TemplateArgs); 3916 TemplateName 3917 SubstTemplateName(TemplateName Name, SourceLocation Loc, 3918 const MultiLevelTemplateArgumentList &TemplateArgs); 3919 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 3920 TemplateArgumentListInfo &Result, 3921 const MultiLevelTemplateArgumentList &TemplateArgs); 3922 3923 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 3924 FunctionDecl *Function, 3925 bool Recursive = false, 3926 bool DefinitionRequired = false); 3927 void InstantiateStaticDataMemberDefinition( 3928 SourceLocation PointOfInstantiation, 3929 VarDecl *Var, 3930 bool Recursive = false, 3931 bool DefinitionRequired = false); 3932 3933 void InstantiateMemInitializers(CXXConstructorDecl *New, 3934 const CXXConstructorDecl *Tmpl, 3935 const MultiLevelTemplateArgumentList &TemplateArgs); 3936 3937 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 3938 const MultiLevelTemplateArgumentList &TemplateArgs); 3939 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 3940 const MultiLevelTemplateArgumentList &TemplateArgs); 3941 3942 // Objective-C declarations. 3943 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 3944 IdentifierInfo *ClassName, 3945 SourceLocation ClassLoc, 3946 IdentifierInfo *SuperName, 3947 SourceLocation SuperLoc, 3948 Decl * const *ProtoRefs, 3949 unsigned NumProtoRefs, 3950 const SourceLocation *ProtoLocs, 3951 SourceLocation EndProtoLoc, 3952 AttributeList *AttrList); 3953 3954 Decl *ActOnCompatiblityAlias( 3955 SourceLocation AtCompatibilityAliasLoc, 3956 IdentifierInfo *AliasName, SourceLocation AliasLocation, 3957 IdentifierInfo *ClassName, SourceLocation ClassLocation); 3958 3959 void CheckForwardProtocolDeclarationForCircularDependency( 3960 IdentifierInfo *PName, 3961 SourceLocation &PLoc, SourceLocation PrevLoc, 3962 const ObjCList<ObjCProtocolDecl> &PList); 3963 3964 Decl *ActOnStartProtocolInterface( 3965 SourceLocation AtProtoInterfaceLoc, 3966 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 3967 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 3968 const SourceLocation *ProtoLocs, 3969 SourceLocation EndProtoLoc, 3970 AttributeList *AttrList); 3971 3972 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 3973 IdentifierInfo *ClassName, 3974 SourceLocation ClassLoc, 3975 IdentifierInfo *CategoryName, 3976 SourceLocation CategoryLoc, 3977 Decl * const *ProtoRefs, 3978 unsigned NumProtoRefs, 3979 const SourceLocation *ProtoLocs, 3980 SourceLocation EndProtoLoc); 3981 3982 Decl *ActOnStartClassImplementation( 3983 SourceLocation AtClassImplLoc, 3984 IdentifierInfo *ClassName, SourceLocation ClassLoc, 3985 IdentifierInfo *SuperClassname, 3986 SourceLocation SuperClassLoc); 3987 3988 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 3989 IdentifierInfo *ClassName, 3990 SourceLocation ClassLoc, 3991 IdentifierInfo *CatName, 3992 SourceLocation CatLoc); 3993 3994 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 3995 IdentifierInfo **IdentList, 3996 SourceLocation *IdentLocs, 3997 unsigned NumElts); 3998 3999 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4000 const IdentifierLocPair *IdentList, 4001 unsigned NumElts, 4002 AttributeList *attrList); 4003 4004 void FindProtocolDeclaration(bool WarnOnDeclarations, 4005 const IdentifierLocPair *ProtocolId, 4006 unsigned NumProtocols, 4007 llvm::SmallVectorImpl<Decl *> &Protocols); 4008 4009 /// Ensure attributes are consistent with type. 4010 /// \param [in, out] Attributes The attributes to check; they will 4011 /// be modified to be consistent with \arg PropertyTy. 4012 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4013 SourceLocation Loc, 4014 unsigned &Attributes); 4015 4016 /// Process the specified property declaration and create decls for the 4017 /// setters and getters as needed. 4018 /// \param property The property declaration being processed 4019 /// \param DC The semantic container for the property 4020 /// \param redeclaredProperty Declaration for property if redeclared 4021 /// in class extension. 4022 /// \param lexicalDC Container for redeclaredProperty. 4023 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4024 ObjCContainerDecl *DC, 4025 ObjCPropertyDecl *redeclaredProperty = 0, 4026 ObjCContainerDecl *lexicalDC = 0); 4027 4028 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4029 ObjCPropertyDecl *SuperProperty, 4030 const IdentifierInfo *Name); 4031 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4032 4033 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4034 ObjCMethodDecl *MethodDecl, 4035 bool IsInstance); 4036 4037 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4038 4039 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4040 ObjCInterfaceDecl *ID); 4041 4042 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4043 ObjCProtocolDecl *PDecl); 4044 4045 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4046 Decl **allMethods = 0, unsigned allNum = 0, 4047 Decl **allProperties = 0, unsigned pNum = 0, 4048 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4049 4050 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4051 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4052 Selector GetterSel, Selector SetterSel, 4053 Decl *ClassCategory, 4054 bool *OverridingProperty, 4055 tok::ObjCKeywordKind MethodImplKind, 4056 DeclContext *lexicalDC = 0); 4057 4058 Decl *ActOnPropertyImplDecl(Scope *S, 4059 SourceLocation AtLoc, 4060 SourceLocation PropertyLoc, 4061 bool ImplKind,Decl *ClassImplDecl, 4062 IdentifierInfo *PropertyId, 4063 IdentifierInfo *PropertyIvar, 4064 SourceLocation PropertyIvarLoc); 4065 4066 struct ObjCArgInfo { 4067 IdentifierInfo *Name; 4068 SourceLocation NameLoc; 4069 // The Type is null if no type was specified, and the DeclSpec is invalid 4070 // in this case. 4071 ParsedType Type; 4072 ObjCDeclSpec DeclSpec; 4073 4074 /// ArgAttrs - Attribute list for this argument. 4075 AttributeList *ArgAttrs; 4076 }; 4077 4078 Decl *ActOnMethodDeclaration( 4079 SourceLocation BeginLoc, // location of the + or -. 4080 SourceLocation EndLoc, // location of the ; or {. 4081 tok::TokenKind MethodType, 4082 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4083 Selector Sel, 4084 // optional arguments. The number of types/arguments is obtained 4085 // from the Sel.getNumArgs(). 4086 ObjCArgInfo *ArgInfo, 4087 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4088 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4089 bool isVariadic = false); 4090 4091 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4092 // Will search "local" class/category implementations for a method decl. 4093 // Will also search in class's root looking for instance method. 4094 // Returns 0 if no method is found. 4095 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4096 ObjCInterfaceDecl *CDecl); 4097 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4098 ObjCInterfaceDecl *ClassDecl); 4099 4100 ExprResult 4101 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4102 Expr *BaseExpr, 4103 DeclarationName MemberName, 4104 SourceLocation MemberLoc, 4105 SourceLocation SuperLoc, QualType SuperType, 4106 bool Super); 4107 4108 ExprResult 4109 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4110 IdentifierInfo &propertyName, 4111 SourceLocation receiverNameLoc, 4112 SourceLocation propertyNameLoc); 4113 4114 /// \brief Describes the kind of message expression indicated by a message 4115 /// send that starts with an identifier. 4116 enum ObjCMessageKind { 4117 /// \brief The message is sent to 'super'. 4118 ObjCSuperMessage, 4119 /// \brief The message is an instance message. 4120 ObjCInstanceMessage, 4121 /// \brief The message is a class message, and the identifier is a type 4122 /// name. 4123 ObjCClassMessage 4124 }; 4125 4126 ObjCMessageKind getObjCMessageKind(Scope *S, 4127 IdentifierInfo *Name, 4128 SourceLocation NameLoc, 4129 bool IsSuper, 4130 bool HasTrailingDot, 4131 ParsedType &ReceiverType); 4132 4133 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4134 Selector Sel, 4135 SourceLocation LBracLoc, 4136 SourceLocation SelectorLoc, 4137 SourceLocation RBracLoc, 4138 MultiExprArg Args); 4139 4140 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4141 QualType ReceiverType, 4142 SourceLocation SuperLoc, 4143 Selector Sel, 4144 ObjCMethodDecl *Method, 4145 SourceLocation LBracLoc, 4146 SourceLocation SelectorLoc, 4147 SourceLocation RBracLoc, 4148 MultiExprArg Args); 4149 4150 ExprResult ActOnClassMessage(Scope *S, 4151 ParsedType Receiver, 4152 Selector Sel, 4153 SourceLocation LBracLoc, 4154 SourceLocation SelectorLoc, 4155 SourceLocation RBracLoc, 4156 MultiExprArg Args); 4157 4158 ExprResult BuildInstanceMessage(Expr *Receiver, 4159 QualType ReceiverType, 4160 SourceLocation SuperLoc, 4161 Selector Sel, 4162 ObjCMethodDecl *Method, 4163 SourceLocation LBracLoc, 4164 SourceLocation SelectorLoc, 4165 SourceLocation RBracLoc, 4166 MultiExprArg Args); 4167 4168 ExprResult ActOnInstanceMessage(Scope *S, 4169 Expr *Receiver, 4170 Selector Sel, 4171 SourceLocation LBracLoc, 4172 SourceLocation SelectorLoc, 4173 SourceLocation RBracLoc, 4174 MultiExprArg Args); 4175 4176 4177 enum PragmaOptionsAlignKind { 4178 POAK_Native, // #pragma options align=native 4179 POAK_Natural, // #pragma options align=natural 4180 POAK_Packed, // #pragma options align=packed 4181 POAK_Power, // #pragma options align=power 4182 POAK_Mac68k, // #pragma options align=mac68k 4183 POAK_Reset // #pragma options align=reset 4184 }; 4185 4186 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4187 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4188 SourceLocation PragmaLoc, 4189 SourceLocation KindLoc); 4190 4191 enum PragmaPackKind { 4192 PPK_Default, // #pragma pack([n]) 4193 PPK_Show, // #pragma pack(show), only supported by MSVC. 4194 PPK_Push, // #pragma pack(push, [identifier], [n]) 4195 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4196 }; 4197 4198 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4199 void ActOnPragmaPack(PragmaPackKind Kind, 4200 IdentifierInfo *Name, 4201 Expr *Alignment, 4202 SourceLocation PragmaLoc, 4203 SourceLocation LParenLoc, 4204 SourceLocation RParenLoc); 4205 4206 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4207 void ActOnPragmaUnused(const Token *Identifiers, 4208 unsigned NumIdentifiers, Scope *curScope, 4209 SourceLocation PragmaLoc, 4210 SourceLocation LParenLoc, 4211 SourceLocation RParenLoc); 4212 4213 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4214 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4215 SourceLocation PragmaLoc); 4216 4217 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4218 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4219 4220 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4221 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4222 SourceLocation PragmaLoc, 4223 SourceLocation WeakNameLoc); 4224 4225 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4226 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4227 IdentifierInfo* AliasName, 4228 SourceLocation PragmaLoc, 4229 SourceLocation WeakNameLoc, 4230 SourceLocation AliasNameLoc); 4231 4232 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4233 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4234 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4235 4236 /// FreePackedContext - Deallocate and null out PackContext. 4237 void FreePackedContext(); 4238 4239 /// PushNamespaceVisibilityAttr - Note that we've entered a 4240 /// namespace with a visibility attribute. 4241 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4242 4243 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4244 /// add an appropriate visibility attribute. 4245 void AddPushedVisibilityAttribute(Decl *RD); 4246 4247 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4248 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4249 void PopPragmaVisibility(); 4250 4251 /// FreeVisContext - Deallocate and null out VisContext. 4252 void FreeVisContext(); 4253 4254 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4255 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4256 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4257 4258 /// CastCategory - Get the correct forwarded implicit cast result category 4259 /// from the inner expression. 4260 ExprValueKind CastCategory(Expr *E); 4261 4262 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4263 /// cast. If there is already an implicit cast, merge into the existing one. 4264 /// If isLvalue, the result of the cast is an lvalue. 4265 void ImpCastExprToType(Expr *&Expr, QualType Type, CastKind CK, 4266 ExprValueKind VK = VK_RValue, 4267 const CXXCastPath *BasePath = 0); 4268 4269 /// IgnoredValueConversions - Given that an expression's result is 4270 /// syntactically ignored, perform any conversions that are 4271 /// required. 4272 void IgnoredValueConversions(Expr *&expr); 4273 4274 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4275 // functions and arrays to their respective pointers (C99 6.3.2.1). 4276 Expr *UsualUnaryConversions(Expr *&expr); 4277 4278 // DefaultFunctionArrayConversion - converts functions and arrays 4279 // to their respective pointers (C99 6.3.2.1). 4280 void DefaultFunctionArrayConversion(Expr *&expr); 4281 4282 // DefaultFunctionArrayLvalueConversion - converts functions and 4283 // arrays to their respective pointers and performs the 4284 // lvalue-to-rvalue conversion. 4285 void DefaultFunctionArrayLvalueConversion(Expr *&expr); 4286 4287 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4288 // the operand. This is DefaultFunctionArrayLvalueConversion, 4289 // except that it assumes the operand isn't of function or array 4290 // type. 4291 void DefaultLvalueConversion(Expr *&expr); 4292 4293 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4294 // do not have a prototype. Integer promotions are performed on each 4295 // argument, and arguments that have type float are promoted to double. 4296 void DefaultArgumentPromotion(Expr *&Expr); 4297 4298 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4299 enum VariadicCallType { 4300 VariadicFunction, 4301 VariadicBlock, 4302 VariadicMethod, 4303 VariadicConstructor, 4304 VariadicDoesNotApply 4305 }; 4306 4307 /// GatherArgumentsForCall - Collector argument expressions for various 4308 /// form of call prototypes. 4309 bool GatherArgumentsForCall(SourceLocation CallLoc, 4310 FunctionDecl *FDecl, 4311 const FunctionProtoType *Proto, 4312 unsigned FirstProtoArg, 4313 Expr **Args, unsigned NumArgs, 4314 llvm::SmallVector<Expr *, 8> &AllArgs, 4315 VariadicCallType CallType = VariadicDoesNotApply); 4316 4317 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4318 // will warn if the resulting type is not a POD type. 4319 bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT, 4320 FunctionDecl *FDecl); 4321 4322 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4323 // operands and then handles various conversions that are common to binary 4324 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4325 // routine returns the first non-arithmetic type found. The client is 4326 // responsible for emitting appropriate error diagnostics. 4327 QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr, 4328 bool isCompAssign = false); 4329 4330 /// AssignConvertType - All of the 'assignment' semantic checks return this 4331 /// enum to indicate whether the assignment was allowed. These checks are 4332 /// done for simple assignments, as well as initialization, return from 4333 /// function, argument passing, etc. The query is phrased in terms of a 4334 /// source and destination type. 4335 enum AssignConvertType { 4336 /// Compatible - the types are compatible according to the standard. 4337 Compatible, 4338 4339 /// PointerToInt - The assignment converts a pointer to an int, which we 4340 /// accept as an extension. 4341 PointerToInt, 4342 4343 /// IntToPointer - The assignment converts an int to a pointer, which we 4344 /// accept as an extension. 4345 IntToPointer, 4346 4347 /// FunctionVoidPointer - The assignment is between a function pointer and 4348 /// void*, which the standard doesn't allow, but we accept as an extension. 4349 FunctionVoidPointer, 4350 4351 /// IncompatiblePointer - The assignment is between two pointers types that 4352 /// are not compatible, but we accept them as an extension. 4353 IncompatiblePointer, 4354 4355 /// IncompatiblePointer - The assignment is between two pointers types which 4356 /// point to integers which have a different sign, but are otherwise identical. 4357 /// This is a subset of the above, but broken out because it's by far the most 4358 /// common case of incompatible pointers. 4359 IncompatiblePointerSign, 4360 4361 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4362 /// c/v/r qualifiers, which we accept as an extension. 4363 CompatiblePointerDiscardsQualifiers, 4364 4365 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4366 /// nested pointer types, and the qualifiers other than the first two 4367 /// levels differ e.g. char ** -> const char **, but we accept them as an 4368 /// extension. 4369 IncompatibleNestedPointerQualifiers, 4370 4371 /// IncompatibleVectors - The assignment is between two vector types that 4372 /// have the same size, which we accept as an extension. 4373 IncompatibleVectors, 4374 4375 /// IntToBlockPointer - The assignment converts an int to a block 4376 /// pointer. We disallow this. 4377 IntToBlockPointer, 4378 4379 /// IncompatibleBlockPointer - The assignment is between two block 4380 /// pointers types that are not compatible. 4381 IncompatibleBlockPointer, 4382 4383 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4384 /// id type and something else (that is incompatible with it). For example, 4385 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4386 IncompatibleObjCQualifiedId, 4387 4388 /// Incompatible - We reject this conversion outright, it is invalid to 4389 /// represent it in the AST. 4390 Incompatible 4391 }; 4392 4393 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4394 /// assignment conversion type specified by ConvTy. This returns true if the 4395 /// conversion was invalid or false if the conversion was accepted. 4396 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4397 SourceLocation Loc, 4398 QualType DstType, QualType SrcType, 4399 Expr *SrcExpr, AssignmentAction Action, 4400 bool *Complained = 0); 4401 4402 /// CheckAssignmentConstraints - Perform type checking for assignment, 4403 /// argument passing, variable initialization, and function return values. 4404 /// C99 6.5.16. 4405 AssignConvertType CheckAssignmentConstraints(QualType lhs, QualType rhs); 4406 4407 /// Check assignment constraints and prepare for a conversion of the 4408 /// RHS to the LHS type. 4409 AssignConvertType CheckAssignmentConstraints(QualType lhs, Expr *&rhs, 4410 CastKind &Kind); 4411 4412 // CheckSingleAssignmentConstraints - Currently used by 4413 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4414 // this routine performs the default function/array converions. 4415 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4416 Expr *&rExpr); 4417 4418 // \brief If the lhs type is a transparent union, check whether we 4419 // can initialize the transparent union with the given expression. 4420 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4421 Expr *&rExpr); 4422 4423 // Helper function for CheckAssignmentConstraints (C99 6.5.16.1p1) 4424 AssignConvertType CheckPointerTypesForAssignment(QualType lhsType, 4425 QualType rhsType); 4426 4427 AssignConvertType CheckObjCPointerTypesForAssignment(QualType lhsType, 4428 QualType rhsType); 4429 4430 // Helper function for CheckAssignmentConstraints involving two 4431 // block pointer types. 4432 AssignConvertType CheckBlockPointerTypesForAssignment(QualType lhsType, 4433 QualType rhsType); 4434 4435 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4436 4437 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4438 4439 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4440 AssignmentAction Action, 4441 bool AllowExplicit = false); 4442 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4443 AssignmentAction Action, 4444 bool AllowExplicit, 4445 ImplicitConversionSequence& ICS); 4446 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4447 const ImplicitConversionSequence& ICS, 4448 AssignmentAction Action, 4449 bool IgnoreBaseAccess = false); 4450 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4451 const StandardConversionSequence& SCS, 4452 AssignmentAction Action,bool IgnoreBaseAccess); 4453 4454 /// the following "Check" methods will return a valid/converted QualType 4455 /// or a null QualType (indicating an error diagnostic was issued). 4456 4457 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4458 QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4459 QualType CheckPointerToMemberOperands( // C++ 5.5 4460 Expr *&lex, Expr *&rex, ExprValueKind &VK, 4461 SourceLocation OpLoc, bool isIndirect); 4462 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4463 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign, 4464 bool isDivide); 4465 QualType CheckRemainderOperands( // C99 6.5.5 4466 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4467 QualType CheckAdditionOperands( // C99 6.5.6 4468 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4469 QualType CheckSubtractionOperands( // C99 6.5.6 4470 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4471 QualType CheckShiftOperands( // C99 6.5.7 4472 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4473 QualType CheckCompareOperands( // C99 6.5.8/9 4474 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4475 bool isRelational); 4476 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4477 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4478 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4479 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc); 4480 // CheckAssignmentOperands is used for both simple and compound assignment. 4481 // For simple assignment, pass both expressions and a null converted type. 4482 // For compound assignment, pass both expressions and the converted type. 4483 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4484 Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType); 4485 4486 void ConvertPropertyForRValue(Expr *&E); 4487 void ConvertPropertyForLValue(Expr *&LHS, Expr *&RHS, QualType& LHSTy); 4488 4489 QualType CheckConditionalOperands( // C99 6.5.15 4490 Expr *&cond, Expr *&lhs, Expr *&rhs, Expr *&save, 4491 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4492 QualType CXXCheckConditionalOperands( // C++ 5.16 4493 Expr *&cond, Expr *&lhs, Expr *&rhs, Expr *&save, 4494 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4495 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4496 bool *NonStandardCompositeType = 0); 4497 4498 QualType FindCompositeObjCPointerType(Expr *&LHS, Expr *&RHS, 4499 SourceLocation questionLoc); 4500 4501 /// type checking for vector binary operators. 4502 QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4503 QualType CheckVectorCompareOperands(Expr *&lex, Expr *&rx, 4504 SourceLocation l, bool isRel); 4505 4506 /// type checking declaration initializers (C99 6.7.8) 4507 bool CheckInitList(const InitializedEntity &Entity, 4508 InitListExpr *&InitList, QualType &DeclType); 4509 bool CheckForConstantInitializer(Expr *e, QualType t); 4510 4511 // type checking C++ declaration initializers (C++ [dcl.init]). 4512 4513 /// ReferenceCompareResult - Expresses the result of comparing two 4514 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 4515 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 4516 enum ReferenceCompareResult { 4517 /// Ref_Incompatible - The two types are incompatible, so direct 4518 /// reference binding is not possible. 4519 Ref_Incompatible = 0, 4520 /// Ref_Related - The two types are reference-related, which means 4521 /// that their unqualified forms (T1 and T2) are either the same 4522 /// or T1 is a base class of T2. 4523 Ref_Related, 4524 /// Ref_Compatible_With_Added_Qualification - The two types are 4525 /// reference-compatible with added qualification, meaning that 4526 /// they are reference-compatible and the qualifiers on T1 (cv1) 4527 /// are greater than the qualifiers on T2 (cv2). 4528 Ref_Compatible_With_Added_Qualification, 4529 /// Ref_Compatible - The two types are reference-compatible and 4530 /// have equivalent qualifiers (cv1 == cv2). 4531 Ref_Compatible 4532 }; 4533 4534 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 4535 QualType T1, QualType T2, 4536 bool &DerivedToBase, 4537 bool &ObjCConversion); 4538 4539 /// CheckCastTypes - Check type constraints for casting between types under 4540 /// C semantics, or forward to CXXCheckCStyleCast in C++. 4541 bool CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *&CastExpr, 4542 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 4543 bool FunctionalStyle = false); 4544 4545 // CheckVectorCast - check type constraints for vectors. 4546 // Since vectors are an extension, there are no C standard reference for this. 4547 // We allow casting between vectors and integer datatypes of the same size. 4548 // returns true if the cast is invalid 4549 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 4550 CastKind &Kind); 4551 4552 // CheckExtVectorCast - check type constraints for extended vectors. 4553 // Since vectors are an extension, there are no C standard reference for this. 4554 // We allow casting between vectors and integer datatypes of the same size, 4555 // or vectors and the element type of that vector. 4556 // returns true if the cast is invalid 4557 bool CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *&CastExpr, 4558 CastKind &Kind); 4559 4560 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 4561 /// cast under C++ semantics. 4562 bool CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 4563 Expr *&CastExpr, CastKind &Kind, 4564 CXXCastPath &BasePath, bool FunctionalStyle); 4565 4566 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 4567 /// \param Method - May be null. 4568 /// \param [out] ReturnType - The return type of the send. 4569 /// \return true iff there were any incompatible types. 4570 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 4571 ObjCMethodDecl *Method, bool isClassMessage, 4572 SourceLocation lbrac, SourceLocation rbrac, 4573 QualType &ReturnType, ExprValueKind &VK); 4574 4575 /// CheckBooleanCondition - Diagnose problems involving the use of 4576 /// the given expression as a boolean condition (e.g. in an if 4577 /// statement). Also performs the standard function and array 4578 /// decays, possibly changing the input variable. 4579 /// 4580 /// \param Loc - A location associated with the condition, e.g. the 4581 /// 'if' keyword. 4582 /// \return true iff there were any errors 4583 bool CheckBooleanCondition(Expr *&CondExpr, SourceLocation Loc); 4584 4585 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 4586 Expr *SubExpr); 4587 4588 /// DiagnoseAssignmentAsCondition - Given that an expression is 4589 /// being used as a boolean condition, warn if it's an assignment. 4590 void DiagnoseAssignmentAsCondition(Expr *E); 4591 4592 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 4593 bool CheckCXXBooleanCondition(Expr *&CondExpr); 4594 4595 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 4596 /// the specified width and sign. If an overflow occurs, detect it and emit 4597 /// the specified diagnostic. 4598 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 4599 unsigned NewWidth, bool NewSign, 4600 SourceLocation Loc, unsigned DiagID); 4601 4602 /// Checks that the Objective-C declaration is declared in the global scope. 4603 /// Emits an error and marks the declaration as invalid if it's not declared 4604 /// in the global scope. 4605 bool CheckObjCDeclScope(Decl *D); 4606 4607 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 4608 /// and reports the appropriate diagnostics. Returns false on success. 4609 /// Can optionally return the value of the expression. 4610 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 4611 4612 /// VerifyBitField - verifies that a bit field expression is an ICE and has 4613 /// the correct width, and that the field type is valid. 4614 /// Returns false on success. 4615 /// Can optionally return whether the bit-field is of width 0 4616 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 4617 QualType FieldTy, const Expr *BitWidth, 4618 bool *ZeroWidth = 0); 4619 4620 /// \name Code completion 4621 //@{ 4622 /// \brief Describes the context in which code completion occurs. 4623 enum ParserCompletionContext { 4624 /// \brief Code completion occurs at top-level or namespace context. 4625 PCC_Namespace, 4626 /// \brief Code completion occurs within a class, struct, or union. 4627 PCC_Class, 4628 /// \brief Code completion occurs within an Objective-C interface, protocol, 4629 /// or category. 4630 PCC_ObjCInterface, 4631 /// \brief Code completion occurs within an Objective-C implementation or 4632 /// category implementation 4633 PCC_ObjCImplementation, 4634 /// \brief Code completion occurs within the list of instance variables 4635 /// in an Objective-C interface, protocol, category, or implementation. 4636 PCC_ObjCInstanceVariableList, 4637 /// \brief Code completion occurs following one or more template 4638 /// headers. 4639 PCC_Template, 4640 /// \brief Code completion occurs following one or more template 4641 /// headers within a class. 4642 PCC_MemberTemplate, 4643 /// \brief Code completion occurs within an expression. 4644 PCC_Expression, 4645 /// \brief Code completion occurs within a statement, which may 4646 /// also be an expression or a declaration. 4647 PCC_Statement, 4648 /// \brief Code completion occurs at the beginning of the 4649 /// initialization statement (or expression) in a for loop. 4650 PCC_ForInit, 4651 /// \brief Code completion occurs within the condition of an if, 4652 /// while, switch, or for statement. 4653 PCC_Condition, 4654 /// \brief Code completion occurs within the body of a function on a 4655 /// recovery path, where we do not have a specific handle on our position 4656 /// in the grammar. 4657 PCC_RecoveryInFunction, 4658 /// \brief Code completion occurs where only a type is permitted. 4659 PCC_Type, 4660 /// \brief Code completion occurs in a parenthesized expression, which 4661 /// might also be a type cast. 4662 PCC_ParenthesizedExpression 4663 }; 4664 4665 void CodeCompleteOrdinaryName(Scope *S, 4666 ParserCompletionContext CompletionContext); 4667 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 4668 bool AllowNonIdentifiers, 4669 bool AllowNestedNameSpecifiers); 4670 4671 struct CodeCompleteExpressionData; 4672 void CodeCompleteExpression(Scope *S, 4673 const CodeCompleteExpressionData &Data); 4674 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 4675 SourceLocation OpLoc, 4676 bool IsArrow); 4677 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 4678 void CodeCompleteTag(Scope *S, unsigned TagSpec); 4679 void CodeCompleteTypeQualifiers(DeclSpec &DS); 4680 void CodeCompleteCase(Scope *S); 4681 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 4682 void CodeCompleteInitializer(Scope *S, Decl *D); 4683 void CodeCompleteReturn(Scope *S); 4684 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 4685 4686 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 4687 bool EnteringContext); 4688 void CodeCompleteUsing(Scope *S); 4689 void CodeCompleteUsingDirective(Scope *S); 4690 void CodeCompleteNamespaceDecl(Scope *S); 4691 void CodeCompleteNamespaceAliasDecl(Scope *S); 4692 void CodeCompleteOperatorName(Scope *S); 4693 void CodeCompleteConstructorInitializer(Decl *Constructor, 4694 CXXBaseOrMemberInitializer** Initializers, 4695 unsigned NumInitializers); 4696 4697 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 4698 bool InInterface); 4699 void CodeCompleteObjCAtVisibility(Scope *S); 4700 void CodeCompleteObjCAtStatement(Scope *S); 4701 void CodeCompleteObjCAtExpression(Scope *S); 4702 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 4703 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 4704 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 4705 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS); 4706 void CodeCompleteObjCMessageReceiver(Scope *S); 4707 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 4708 IdentifierInfo **SelIdents, 4709 unsigned NumSelIdents, 4710 bool AtArgumentExpression); 4711 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 4712 IdentifierInfo **SelIdents, 4713 unsigned NumSelIdents, 4714 bool AtArgumentExpression, 4715 bool IsSuper = false); 4716 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 4717 IdentifierInfo **SelIdents, 4718 unsigned NumSelIdents, 4719 bool AtArgumentExpression, 4720 ObjCInterfaceDecl *Super = 0); 4721 void CodeCompleteObjCForCollection(Scope *S, 4722 DeclGroupPtrTy IterationVar); 4723 void CodeCompleteObjCSelector(Scope *S, 4724 IdentifierInfo **SelIdents, 4725 unsigned NumSelIdents); 4726 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 4727 unsigned NumProtocols); 4728 void CodeCompleteObjCProtocolDecl(Scope *S); 4729 void CodeCompleteObjCInterfaceDecl(Scope *S); 4730 void CodeCompleteObjCSuperclass(Scope *S, 4731 IdentifierInfo *ClassName, 4732 SourceLocation ClassNameLoc); 4733 void CodeCompleteObjCImplementationDecl(Scope *S); 4734 void CodeCompleteObjCInterfaceCategory(Scope *S, 4735 IdentifierInfo *ClassName, 4736 SourceLocation ClassNameLoc); 4737 void CodeCompleteObjCImplementationCategory(Scope *S, 4738 IdentifierInfo *ClassName, 4739 SourceLocation ClassNameLoc); 4740 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 4741 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 4742 IdentifierInfo *PropertyName, 4743 Decl *ObjCImpDecl); 4744 void CodeCompleteObjCMethodDecl(Scope *S, 4745 bool IsInstanceMethod, 4746 ParsedType ReturnType, 4747 Decl *IDecl); 4748 void CodeCompleteObjCMethodDeclSelector(Scope *S, 4749 bool IsInstanceMethod, 4750 bool AtParameterName, 4751 ParsedType ReturnType, 4752 IdentifierInfo **SelIdents, 4753 unsigned NumSelIdents); 4754 void CodeCompletePreprocessorDirective(bool InConditional); 4755 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 4756 void CodeCompletePreprocessorMacroName(bool IsDefinition); 4757 void CodeCompletePreprocessorExpression(); 4758 void CodeCompletePreprocessorMacroArgument(Scope *S, 4759 IdentifierInfo *Macro, 4760 MacroInfo *MacroInfo, 4761 unsigned Argument); 4762 void CodeCompleteNaturalLanguage(); 4763 void GatherGlobalCodeCompletions( 4764 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 4765 //@} 4766 4767 void PrintStats() const {} 4768 4769 //===--------------------------------------------------------------------===// 4770 // Extra semantic analysis beyond the C type system 4771 4772public: 4773 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 4774 unsigned ByteNo) const; 4775 4776private: 4777 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 4778 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 4779 4780 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 4781 bool CheckObjCString(Expr *Arg); 4782 4783 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 4784 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 4785 4786 bool SemaBuiltinVAStart(CallExpr *TheCall); 4787 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 4788 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 4789 4790public: 4791 // Used by C++ template instantiation. 4792 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 4793 4794private: 4795 bool SemaBuiltinPrefetch(CallExpr *TheCall); 4796 bool SemaBuiltinObjectSize(CallExpr *TheCall); 4797 bool SemaBuiltinLongjmp(CallExpr *TheCall); 4798 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 4799 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 4800 llvm::APSInt &Result); 4801 4802 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 4803 bool HasVAListArg, unsigned format_idx, 4804 unsigned firstDataArg, bool isPrintf); 4805 4806 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 4807 const CallExpr *TheCall, bool HasVAListArg, 4808 unsigned format_idx, unsigned firstDataArg, 4809 bool isPrintf); 4810 4811 void CheckNonNullArguments(const NonNullAttr *NonNull, 4812 const CallExpr *TheCall); 4813 4814 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 4815 unsigned format_idx, unsigned firstDataArg, 4816 bool isPrintf); 4817 4818 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 4819 SourceLocation ReturnLoc); 4820 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 4821 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 4822 4823 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 4824 Expr *Init); 4825 4826 /// \brief The parser's current scope. 4827 /// 4828 /// The parser maintains this state here. 4829 Scope *CurScope; 4830 4831protected: 4832 friend class Parser; 4833 friend class InitializationSequence; 4834 4835 /// \brief Retrieve the parser's current scope. 4836 Scope *getCurScope() const { return CurScope; } 4837}; 4838 4839/// \brief RAII object that enters a new expression evaluation context. 4840class EnterExpressionEvaluationContext { 4841 Sema &Actions; 4842 4843public: 4844 EnterExpressionEvaluationContext(Sema &Actions, 4845 Sema::ExpressionEvaluationContext NewContext) 4846 : Actions(Actions) { 4847 Actions.PushExpressionEvaluationContext(NewContext); 4848 } 4849 4850 ~EnterExpressionEvaluationContext() { 4851 Actions.PopExpressionEvaluationContext(); 4852 } 4853}; 4854 4855} // end namespace clang 4856 4857#endif 4858