Sema.h revision 44cd9f9d686dfdb9ad16113c41c2dca1da35a646
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "llvm/ADT/OwningPtr.h" 31#include "llvm/ADT/SmallPtrSet.h" 32#include "llvm/ADT/SmallVector.h" 33#include <deque> 34#include <string> 35 36namespace llvm { 37 class APSInt; 38 template <typename ValueT> struct DenseMapInfo; 39 template <typename ValueT, typename ValueInfoT> class DenseSet; 40} 41 42namespace clang { 43 class ADLResult; 44 class ASTConsumer; 45 class ASTContext; 46 class ArrayType; 47 class AttributeList; 48 class BlockDecl; 49 class CXXBasePath; 50 class CXXBasePaths; 51 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 52 class CXXConstructorDecl; 53 class CXXConversionDecl; 54 class CXXDestructorDecl; 55 class CXXFieldCollector; 56 class CXXMemberCallExpr; 57 class CXXMethodDecl; 58 class CXXScopeSpec; 59 class CXXTemporary; 60 class CXXTryStmt; 61 class CallExpr; 62 class ClassTemplateDecl; 63 class ClassTemplatePartialSpecializationDecl; 64 class ClassTemplateSpecializationDecl; 65 class CodeCompleteConsumer; 66 class CodeCompletionAllocator; 67 class CodeCompletionResult; 68 class Decl; 69 class DeclAccessPair; 70 class DeclContext; 71 class DeclRefExpr; 72 class DeclaratorDecl; 73 class DeducedTemplateArgument; 74 class DependentDiagnostic; 75 class DesignatedInitExpr; 76 class Designation; 77 class EnumConstantDecl; 78 class Expr; 79 class ExtVectorType; 80 class ExternalSemaSource; 81 class FormatAttr; 82 class FriendDecl; 83 class FunctionDecl; 84 class FunctionProtoType; 85 class FunctionTemplateDecl; 86 class ImplicitConversionSequence; 87 class InitListExpr; 88 class InitializationKind; 89 class InitializationSequence; 90 class InitializedEntity; 91 class IntegerLiteral; 92 class LabelStmt; 93 class LangOptions; 94 class LocalInstantiationScope; 95 class LookupResult; 96 class MacroInfo; 97 class MultiLevelTemplateArgumentList; 98 class NamedDecl; 99 class NonNullAttr; 100 class ObjCCategoryDecl; 101 class ObjCCategoryImplDecl; 102 class ObjCCompatibleAliasDecl; 103 class ObjCContainerDecl; 104 class ObjCImplDecl; 105 class ObjCImplementationDecl; 106 class ObjCInterfaceDecl; 107 class ObjCIvarDecl; 108 template <class T> class ObjCList; 109 class ObjCMethodDecl; 110 class ObjCPropertyDecl; 111 class ObjCProtocolDecl; 112 class OverloadCandidateSet; 113 class ParenListExpr; 114 class ParmVarDecl; 115 class Preprocessor; 116 class PseudoDestructorTypeStorage; 117 class QualType; 118 class StandardConversionSequence; 119 class Stmt; 120 class StringLiteral; 121 class SwitchStmt; 122 class TargetAttributesSema; 123 class TemplateArgument; 124 class TemplateArgumentList; 125 class TemplateArgumentLoc; 126 class TemplateDecl; 127 class TemplateParameterList; 128 class TemplatePartialOrderingContext; 129 class TemplateTemplateParmDecl; 130 class Token; 131 class TypedefDecl; 132 class TypeLoc; 133 class UnqualifiedId; 134 class UnresolvedLookupExpr; 135 class UnresolvedMemberExpr; 136 class UnresolvedSetImpl; 137 class UnresolvedSetIterator; 138 class UsingDecl; 139 class UsingShadowDecl; 140 class ValueDecl; 141 class VarDecl; 142 class VisibilityAttr; 143 class VisibleDeclConsumer; 144 class IndirectFieldDecl; 145 146namespace sema { 147 class AccessedEntity; 148 class BlockScopeInfo; 149 class DelayedDiagnostic; 150 class FunctionScopeInfo; 151 class TemplateDeductionInfo; 152} 153 154/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 155/// parsing. 156/// 157/// LocInfoType is a "transient" type, only needed for passing to/from Parser 158/// and Sema, when we want to preserve type source info for a parsed type. 159/// It will not participate in the type system semantics in any way. 160class LocInfoType : public Type { 161 enum { 162 // The last number that can fit in Type's TC. 163 // Avoids conflict with an existing Type class. 164 LocInfo = Type::TypeLast + 1 165 }; 166 167 TypeSourceInfo *DeclInfo; 168 169 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 170 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 171 ty->isVariablyModifiedType(), 172 ty->containsUnexpandedParameterPack()), 173 DeclInfo(TInfo) { 174 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 175 } 176 friend class Sema; 177 178public: 179 QualType getType() const { return getCanonicalTypeInternal(); } 180 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 181 182 void getAsStringInternal(std::string &Str, 183 const PrintingPolicy &Policy) const; 184 185 static bool classof(const Type *T) { 186 return T->getTypeClass() == (TypeClass)LocInfo; 187 } 188 static bool classof(const LocInfoType *) { return true; } 189}; 190 191// FIXME: No way to easily map from TemplateTypeParmTypes to 192// TemplateTypeParmDecls, so we have this horrible PointerUnion. 193typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 194 SourceLocation> UnexpandedParameterPack; 195 196/// Sema - This implements semantic analysis and AST building for C. 197class Sema { 198 Sema(const Sema&); // DO NOT IMPLEMENT 199 void operator=(const Sema&); // DO NOT IMPLEMENT 200 mutable const TargetAttributesSema* TheTargetAttributesSema; 201public: 202 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 203 typedef OpaquePtr<TemplateName> TemplateTy; 204 typedef OpaquePtr<QualType> TypeTy; 205 typedef Attr AttrTy; 206 typedef CXXBaseSpecifier BaseTy; 207 typedef CXXCtorInitializer MemInitTy; 208 typedef Expr ExprTy; 209 typedef Stmt StmtTy; 210 typedef TemplateParameterList TemplateParamsTy; 211 typedef NestedNameSpecifier CXXScopeTy; 212 213 OpenCLOptions OpenCLFeatures; 214 FPOptions FPFeatures; 215 216 const LangOptions &LangOpts; 217 Preprocessor &PP; 218 ASTContext &Context; 219 ASTConsumer &Consumer; 220 Diagnostic &Diags; 221 SourceManager &SourceMgr; 222 223 /// \brief Source of additional semantic information. 224 ExternalSemaSource *ExternalSource; 225 226 /// \brief Code-completion consumer. 227 CodeCompleteConsumer *CodeCompleter; 228 229 /// CurContext - This is the current declaration context of parsing. 230 DeclContext *CurContext; 231 232 /// VAListTagName - The declaration name corresponding to __va_list_tag. 233 /// This is used as part of a hack to omit that class from ADL results. 234 DeclarationName VAListTagName; 235 236 /// PackContext - Manages the stack for #pragma pack. An alignment 237 /// of 0 indicates default alignment. 238 void *PackContext; // Really a "PragmaPackStack*" 239 240 /// VisContext - Manages the stack for #pragma GCC visibility. 241 void *VisContext; // Really a "PragmaVisStack*" 242 243 /// \brief Stack containing information about each of the nested 244 /// function, block, and method scopes that are currently active. 245 /// 246 /// This array is never empty. Clients should ignore the first 247 /// element, which is used to cache a single FunctionScopeInfo 248 /// that's used to parse every top-level function. 249 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 250 251 /// ExprTemporaries - This is the stack of temporaries that are created by 252 /// the current full expression. 253 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 254 255 /// ExtVectorDecls - This is a list all the extended vector types. This allows 256 /// us to associate a raw vector type with one of the ext_vector type names. 257 /// This is only necessary for issuing pretty diagnostics. 258 llvm::SmallVector<TypedefDecl*, 24> ExtVectorDecls; 259 260 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 261 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 262 263 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 264 265 /// PureVirtualClassDiagSet - a set of class declarations which we have 266 /// emitted a list of pure virtual functions. Used to prevent emitting the 267 /// same list more than once. 268 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 269 270 /// ParsingInitForAutoVars - a set of declarations with auto types for which 271 /// we are currently parsing the initializer. 272 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 273 274 /// \brief A mapping from external names to the most recent 275 /// locally-scoped external declaration with that name. 276 /// 277 /// This map contains external declarations introduced in local 278 /// scoped, e.g., 279 /// 280 /// \code 281 /// void f() { 282 /// void foo(int, int); 283 /// } 284 /// \endcode 285 /// 286 /// Here, the name "foo" will be associated with the declaration on 287 /// "foo" within f. This name is not visible outside of 288 /// "f". However, we still find it in two cases: 289 /// 290 /// - If we are declaring another external with the name "foo", we 291 /// can find "foo" as a previous declaration, so that the types 292 /// of this external declaration can be checked for 293 /// compatibility. 294 /// 295 /// - If we would implicitly declare "foo" (e.g., due to a call to 296 /// "foo" in C when no prototype or definition is visible), then 297 /// we find this declaration of "foo" and complain that it is 298 /// not visible. 299 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 300 301 /// \brief All the tentative definitions encountered in the TU. 302 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 303 304 /// \brief The set of file scoped decls seen so far that have not been used 305 /// and must warn if not used. Only contains the first declaration. 306 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 307 308 class DelayedDiagnostics; 309 310 class ParsingDeclState { 311 unsigned SavedStackSize; 312 friend class Sema::DelayedDiagnostics; 313 }; 314 315 class ProcessingContextState { 316 unsigned SavedParsingDepth; 317 unsigned SavedActiveStackBase; 318 friend class Sema::DelayedDiagnostics; 319 }; 320 321 /// A class which encapsulates the logic for delaying diagnostics 322 /// during parsing and other processing. 323 class DelayedDiagnostics { 324 /// \brief The stack of diagnostics that were delayed due to being 325 /// produced during the parsing of a declaration. 326 sema::DelayedDiagnostic *Stack; 327 328 /// \brief The number of objects on the delayed-diagnostics stack. 329 unsigned StackSize; 330 331 /// \brief The current capacity of the delayed-diagnostics stack. 332 unsigned StackCapacity; 333 334 /// \brief The index of the first "active" delayed diagnostic in 335 /// the stack. When parsing class definitions, we ignore active 336 /// delayed diagnostics from the surrounding context. 337 unsigned ActiveStackBase; 338 339 /// \brief The depth of the declarations we're currently parsing. 340 /// This gets saved and reset whenever we enter a class definition. 341 unsigned ParsingDepth; 342 343 public: 344 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 345 ActiveStackBase(0), ParsingDepth(0) {} 346 347 ~DelayedDiagnostics() { 348 delete[] reinterpret_cast<char*>(Stack); 349 } 350 351 /// Adds a delayed diagnostic. 352 void add(const sema::DelayedDiagnostic &diag); 353 354 /// Determines whether diagnostics should be delayed. 355 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 356 357 /// Observe that we've started parsing a declaration. Access and 358 /// deprecation diagnostics will be delayed; when the declaration 359 /// is completed, all active delayed diagnostics will be evaluated 360 /// in its context, and then active diagnostics stack will be 361 /// popped down to the saved depth. 362 ParsingDeclState pushParsingDecl() { 363 ParsingDepth++; 364 365 ParsingDeclState state; 366 state.SavedStackSize = StackSize; 367 return state; 368 } 369 370 /// Observe that we're completed parsing a declaration. 371 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 372 373 /// Observe that we've started processing a different context, the 374 /// contents of which are semantically separate from the 375 /// declarations it may lexically appear in. This sets aside the 376 /// current stack of active diagnostics and starts afresh. 377 ProcessingContextState pushContext() { 378 assert(StackSize >= ActiveStackBase); 379 380 ProcessingContextState state; 381 state.SavedParsingDepth = ParsingDepth; 382 state.SavedActiveStackBase = ActiveStackBase; 383 384 ActiveStackBase = StackSize; 385 ParsingDepth = 0; 386 387 return state; 388 } 389 390 /// Observe that we've stopped processing a context. This 391 /// restores the previous stack of active diagnostics. 392 void popContext(ProcessingContextState state) { 393 assert(ActiveStackBase == StackSize); 394 assert(ParsingDepth == 0); 395 ActiveStackBase = state.SavedActiveStackBase; 396 ParsingDepth = state.SavedParsingDepth; 397 } 398 } DelayedDiagnostics; 399 400 /// A RAII object to temporarily push a declaration context. 401 class ContextRAII { 402 private: 403 Sema &S; 404 DeclContext *SavedContext; 405 ProcessingContextState SavedContextState; 406 407 public: 408 ContextRAII(Sema &S, DeclContext *ContextToPush) 409 : S(S), SavedContext(S.CurContext), 410 SavedContextState(S.DelayedDiagnostics.pushContext()) 411 { 412 assert(ContextToPush && "pushing null context"); 413 S.CurContext = ContextToPush; 414 } 415 416 void pop() { 417 if (!SavedContext) return; 418 S.CurContext = SavedContext; 419 S.DelayedDiagnostics.popContext(SavedContextState); 420 SavedContext = 0; 421 } 422 423 ~ContextRAII() { 424 pop(); 425 } 426 }; 427 428 /// WeakUndeclaredIdentifiers - Identifiers contained in 429 /// #pragma weak before declared. rare. may alias another 430 /// identifier, declared or undeclared 431 class WeakInfo { 432 IdentifierInfo *alias; // alias (optional) 433 SourceLocation loc; // for diagnostics 434 bool used; // identifier later declared? 435 public: 436 WeakInfo() 437 : alias(0), loc(SourceLocation()), used(false) {} 438 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 439 : alias(Alias), loc(Loc), used(false) {} 440 inline IdentifierInfo * getAlias() const { return alias; } 441 inline SourceLocation getLocation() const { return loc; } 442 void setUsed(bool Used=true) { used = Used; } 443 inline bool getUsed() { return used; } 444 bool operator==(WeakInfo RHS) const { 445 return alias == RHS.getAlias() && loc == RHS.getLocation(); 446 } 447 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 448 }; 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 452 /// #pragma weak during processing of other Decls. 453 /// I couldn't figure out a clean way to generate these in-line, so 454 /// we store them here and handle separately -- which is a hack. 455 /// It would be best to refactor this. 456 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 457 458 IdentifierResolver IdResolver; 459 460 /// Translation Unit Scope - useful to Objective-C actions that need 461 /// to lookup file scope declarations in the "ordinary" C decl namespace. 462 /// For example, user-defined classes, built-in "id" type, etc. 463 Scope *TUScope; 464 465 /// \brief The C++ "std" namespace, where the standard library resides. 466 LazyDeclPtr StdNamespace; 467 468 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 469 /// standard library. 470 LazyDeclPtr StdBadAlloc; 471 472 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 473 RecordDecl *CXXTypeInfoDecl; 474 475 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 476 RecordDecl *MSVCGuidDecl; 477 478 /// A flag to remember whether the implicit forms of operator new and delete 479 /// have been declared. 480 bool GlobalNewDeleteDeclared; 481 482 /// \brief The set of declarations that have been referenced within 483 /// a potentially evaluated expression. 484 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 485 PotentiallyReferencedDecls; 486 487 /// \brief A set of diagnostics that may be emitted. 488 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 489 PotentiallyEmittedDiagnostics; 490 491 /// \brief Describes how the expressions currently being parsed are 492 /// evaluated at run-time, if at all. 493 enum ExpressionEvaluationContext { 494 /// \brief The current expression and its subexpressions occur within an 495 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 496 /// or the subexpression of \c sizeof, where the type or the value of the 497 /// expression may be significant but no code will be generated to evaluate 498 /// the value of the expression at run time. 499 Unevaluated, 500 501 /// \brief The current expression is potentially evaluated at run time, 502 /// which means that code may be generated to evaluate the value of the 503 /// expression at run time. 504 PotentiallyEvaluated, 505 506 /// \brief The current expression may be potentially evaluated or it may 507 /// be unevaluated, but it is impossible to tell from the lexical context. 508 /// This evaluation context is used primary for the operand of the C++ 509 /// \c typeid expression, whose argument is potentially evaluated only when 510 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 511 PotentiallyPotentiallyEvaluated, 512 513 /// \brief The current expression is potentially evaluated, but any 514 /// declarations referenced inside that expression are only used if 515 /// in fact the current expression is used. 516 /// 517 /// This value is used when parsing default function arguments, for which 518 /// we would like to provide diagnostics (e.g., passing non-POD arguments 519 /// through varargs) but do not want to mark declarations as "referenced" 520 /// until the default argument is used. 521 PotentiallyEvaluatedIfUsed 522 }; 523 524 /// \brief Data structure used to record current or nested 525 /// expression evaluation contexts. 526 struct ExpressionEvaluationContextRecord { 527 /// \brief The expression evaluation context. 528 ExpressionEvaluationContext Context; 529 530 /// \brief The number of temporaries that were active when we 531 /// entered this expression evaluation context. 532 unsigned NumTemporaries; 533 534 /// \brief The set of declarations referenced within a 535 /// potentially potentially-evaluated context. 536 /// 537 /// When leaving a potentially potentially-evaluated context, each 538 /// of these elements will be as referenced if the corresponding 539 /// potentially potentially evaluated expression is potentially 540 /// evaluated. 541 PotentiallyReferencedDecls *PotentiallyReferenced; 542 543 /// \brief The set of diagnostics to emit should this potentially 544 /// potentially-evaluated context become evaluated. 545 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 546 547 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 548 unsigned NumTemporaries) 549 : Context(Context), NumTemporaries(NumTemporaries), 550 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 551 552 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 553 if (!PotentiallyReferenced) 554 PotentiallyReferenced = new PotentiallyReferencedDecls; 555 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 556 } 557 558 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 559 if (!PotentiallyDiagnosed) 560 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 561 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 562 } 563 564 void Destroy() { 565 delete PotentiallyReferenced; 566 delete PotentiallyDiagnosed; 567 PotentiallyReferenced = 0; 568 PotentiallyDiagnosed = 0; 569 } 570 }; 571 572 /// A stack of expression evaluation contexts. 573 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 574 575 /// \brief Whether the code handled by Sema should be considered a 576 /// complete translation unit or not. 577 /// 578 /// When true (which is generally the case), Sema will perform 579 /// end-of-translation-unit semantic tasks (such as creating 580 /// initializers for tentative definitions in C) once parsing has 581 /// completed. This flag will be false when building PCH files, 582 /// since a PCH file is by definition not a complete translation 583 /// unit. 584 bool CompleteTranslationUnit; 585 586 llvm::BumpPtrAllocator BumpAlloc; 587 588 /// \brief The number of SFINAE diagnostics that have been trapped. 589 unsigned NumSFINAEErrors; 590 591 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 592 UnparsedDefaultArgInstantiationsMap; 593 594 /// \brief A mapping from parameters with unparsed default arguments to the 595 /// set of instantiations of each parameter. 596 /// 597 /// This mapping is a temporary data structure used when parsing 598 /// nested class templates or nested classes of class templates, 599 /// where we might end up instantiating an inner class before the 600 /// default arguments of its methods have been parsed. 601 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 602 603 // Contains the locations of the beginning of unparsed default 604 // argument locations. 605 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 606 607 /// UndefinedInternals - all the used, undefined objects with 608 /// internal linkage in this translation unit. 609 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 610 611 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 612 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 613 614 /// Method Pool - allows efficient lookup when typechecking messages to "id". 615 /// We need to maintain a list, since selectors can have differing signatures 616 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 617 /// of selectors are "overloaded"). 618 GlobalMethodPool MethodPool; 619 620 /// Method selectors used in a @selector expression. Used for implementation 621 /// of -Wselector. 622 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 623 624 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 625 626 /// Private Helper predicate to check for 'self'. 627 bool isSelfExpr(Expr *RExpr); 628public: 629 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 630 bool CompleteTranslationUnit = true, 631 CodeCompleteConsumer *CompletionConsumer = 0); 632 ~Sema(); 633 634 /// \brief Perform initialization that occurs after the parser has been 635 /// initialized but before it parses anything. 636 void Initialize(); 637 638 const LangOptions &getLangOptions() const { return LangOpts; } 639 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 640 FPOptions &getFPOptions() { return FPFeatures; } 641 642 Diagnostic &getDiagnostics() const { return Diags; } 643 SourceManager &getSourceManager() const { return SourceMgr; } 644 const TargetAttributesSema &getTargetAttributesSema() const; 645 Preprocessor &getPreprocessor() const { return PP; } 646 ASTContext &getASTContext() const { return Context; } 647 ASTConsumer &getASTConsumer() const { return Consumer; } 648 649 /// \brief Helper class that creates diagnostics with optional 650 /// template instantiation stacks. 651 /// 652 /// This class provides a wrapper around the basic DiagnosticBuilder 653 /// class that emits diagnostics. SemaDiagnosticBuilder is 654 /// responsible for emitting the diagnostic (as DiagnosticBuilder 655 /// does) and, if the diagnostic comes from inside a template 656 /// instantiation, printing the template instantiation stack as 657 /// well. 658 class SemaDiagnosticBuilder : public DiagnosticBuilder { 659 Sema &SemaRef; 660 unsigned DiagID; 661 662 public: 663 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 664 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 665 666 explicit SemaDiagnosticBuilder(Sema &SemaRef) 667 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 668 669 ~SemaDiagnosticBuilder(); 670 }; 671 672 /// \brief Emit a diagnostic. 673 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 674 675 /// \brief Emit a partial diagnostic. 676 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 677 678 /// \brief Build a partial diagnostic. 679 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 680 681 ExprResult Owned(Expr* E) { return E; } 682 ExprResult Owned(ExprResult R) { return R; } 683 StmtResult Owned(Stmt* S) { return S; } 684 685 void ActOnEndOfTranslationUnit(); 686 687 Scope *getScopeForContext(DeclContext *Ctx); 688 689 void PushFunctionScope(); 690 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 691 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 692 const Decl *D = 0, const BlockExpr *blkExpr = 0); 693 694 sema::FunctionScopeInfo *getCurFunction() const { 695 return FunctionScopes.back(); 696 } 697 698 bool hasAnyErrorsInThisFunction() const; 699 700 /// \brief Retrieve the current block, if any. 701 sema::BlockScopeInfo *getCurBlock(); 702 703 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 704 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 705 706 //===--------------------------------------------------------------------===// 707 // Type Analysis / Processing: SemaType.cpp. 708 // 709 710 QualType adjustParameterType(QualType T); 711 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 712 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 713 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 714 } 715 QualType BuildPointerType(QualType T, 716 SourceLocation Loc, DeclarationName Entity); 717 QualType BuildReferenceType(QualType T, bool LValueRef, 718 SourceLocation Loc, DeclarationName Entity); 719 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 720 Expr *ArraySize, unsigned Quals, 721 SourceRange Brackets, DeclarationName Entity); 722 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 723 SourceLocation AttrLoc); 724 QualType BuildFunctionType(QualType T, 725 QualType *ParamTypes, unsigned NumParamTypes, 726 bool Variadic, unsigned Quals, 727 RefQualifierKind RefQualifier, 728 SourceLocation Loc, DeclarationName Entity, 729 FunctionType::ExtInfo Info); 730 QualType BuildMemberPointerType(QualType T, QualType Class, 731 SourceLocation Loc, 732 DeclarationName Entity); 733 QualType BuildBlockPointerType(QualType T, 734 SourceLocation Loc, DeclarationName Entity); 735 QualType BuildParenType(QualType T); 736 737 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 738 TagDecl **OwnedDecl = 0, 739 bool AllowAutoInTypeName = false); 740 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 741 TypeSourceInfo *ReturnTypeInfo); 742 /// \brief Package the given type and TSI into a ParsedType. 743 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 744 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 745 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 746 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 747 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 748 bool CheckDistantExceptionSpec(QualType T); 749 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 750 bool CheckEquivalentExceptionSpec( 751 const FunctionProtoType *Old, SourceLocation OldLoc, 752 const FunctionProtoType *New, SourceLocation NewLoc); 753 bool CheckEquivalentExceptionSpec( 754 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 755 const FunctionProtoType *Old, SourceLocation OldLoc, 756 const FunctionProtoType *New, SourceLocation NewLoc, 757 bool *MissingExceptionSpecification = 0, 758 bool *MissingEmptyExceptionSpecification = 0); 759 bool CheckExceptionSpecSubset( 760 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 761 const FunctionProtoType *Superset, SourceLocation SuperLoc, 762 const FunctionProtoType *Subset, SourceLocation SubLoc); 763 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 764 const FunctionProtoType *Target, SourceLocation TargetLoc, 765 const FunctionProtoType *Source, SourceLocation SourceLoc); 766 767 TypeResult ActOnTypeName(Scope *S, Declarator &D); 768 769 bool RequireCompleteType(SourceLocation Loc, QualType T, 770 const PartialDiagnostic &PD, 771 std::pair<SourceLocation, PartialDiagnostic> Note); 772 bool RequireCompleteType(SourceLocation Loc, QualType T, 773 const PartialDiagnostic &PD); 774 bool RequireCompleteType(SourceLocation Loc, QualType T, 775 unsigned DiagID); 776 777 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 778 const CXXScopeSpec &SS, QualType T); 779 780 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 781 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 782 783 //===--------------------------------------------------------------------===// 784 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 785 // 786 787 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 788 789 void DiagnoseUseOfUnimplementedSelectors(); 790 791 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 792 Scope *S, CXXScopeSpec *SS = 0, 793 bool isClassName = false, 794 bool HasTrailingDot = false, 795 ParsedType ObjectType = ParsedType()); 796 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 797 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 798 SourceLocation IILoc, 799 Scope *S, 800 CXXScopeSpec *SS, 801 ParsedType &SuggestedType); 802 803 Decl *ActOnDeclarator(Scope *S, Declarator &D); 804 805 Decl *HandleDeclarator(Scope *S, Declarator &D, 806 MultiTemplateParamsArg TemplateParameterLists, 807 bool IsFunctionDefinition); 808 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 809 const LookupResult &Previous, 810 Scope *S); 811 void DiagnoseFunctionSpecifiers(Declarator& D); 812 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 813 void CheckShadow(Scope *S, VarDecl *D); 814 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 815 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 816 QualType R, TypeSourceInfo *TInfo, 817 LookupResult &Previous, bool &Redeclaration); 818 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 819 QualType R, TypeSourceInfo *TInfo, 820 LookupResult &Previous, 821 MultiTemplateParamsArg TemplateParamLists, 822 bool &Redeclaration); 823 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 824 bool &Redeclaration); 825 void CheckCompleteVariableDeclaration(VarDecl *var); 826 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 827 QualType R, TypeSourceInfo *TInfo, 828 LookupResult &Previous, 829 MultiTemplateParamsArg TemplateParamLists, 830 bool IsFunctionDefinition, 831 bool &Redeclaration); 832 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 833 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 834 void CheckFunctionDeclaration(Scope *S, 835 FunctionDecl *NewFD, LookupResult &Previous, 836 bool IsExplicitSpecialization, 837 bool &Redeclaration); 838 void CheckMain(FunctionDecl *FD); 839 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 840 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 841 SourceLocation Loc, 842 QualType T); 843 ParmVarDecl *CheckParameter(DeclContext *DC, 844 TypeSourceInfo *TSInfo, QualType T, 845 IdentifierInfo *Name, 846 SourceLocation NameLoc, 847 StorageClass SC, 848 StorageClass SCAsWritten); 849 void ActOnParamDefaultArgument(Decl *param, 850 SourceLocation EqualLoc, 851 Expr *defarg); 852 void ActOnParamUnparsedDefaultArgument(Decl *param, 853 SourceLocation EqualLoc, 854 SourceLocation ArgLoc); 855 void ActOnParamDefaultArgumentError(Decl *param); 856 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 857 SourceLocation EqualLoc); 858 859 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 860 bool TypeMayContainAuto); 861 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 862 void ActOnInitializerError(Decl *Dcl); 863 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 864 void FinalizeDeclaration(Decl *D); 865 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 866 Decl **Group, 867 unsigned NumDecls); 868 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 869 bool TypeMayContainAuto = true); 870 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 871 SourceLocation LocAfterDecls); 872 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 873 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 874 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 875 876 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 877 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 878 879 /// \brief Diagnose any unused parameters in the given sequence of 880 /// ParmVarDecl pointers. 881 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 882 ParmVarDecl * const *End); 883 884 /// \brief Diagnose whether the size of parameters or return value of a 885 /// function or obj-c method definition is pass-by-value and larger than a 886 /// specified threshold. 887 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 888 ParmVarDecl * const *End, 889 QualType ReturnTy, 890 NamedDecl *D); 891 892 void DiagnoseInvalidJumps(Stmt *Body); 893 Decl *ActOnFileScopeAsmDecl(SourceLocation Loc, Expr *expr); 894 895 /// Scope actions. 896 void ActOnPopScope(SourceLocation Loc, Scope *S); 897 void ActOnTranslationUnitScope(Scope *S); 898 899 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 900 /// no declarator (e.g. "struct foo;") is parsed. 901 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 902 DeclSpec &DS); 903 904 StmtResult ActOnVlaStmt(const DeclSpec &DS); 905 906 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 907 AccessSpecifier AS, 908 RecordDecl *Record); 909 910 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 911 RecordDecl *Record); 912 913 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 914 TagTypeKind NewTag, 915 SourceLocation NewTagLoc, 916 const IdentifierInfo &Name); 917 918 enum TagUseKind { 919 TUK_Reference, // Reference to a tag: 'struct foo *X;' 920 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 921 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 922 TUK_Friend // Friend declaration: 'friend struct foo;' 923 }; 924 925 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 926 SourceLocation KWLoc, CXXScopeSpec &SS, 927 IdentifierInfo *Name, SourceLocation NameLoc, 928 AttributeList *Attr, AccessSpecifier AS, 929 MultiTemplateParamsArg TemplateParameterLists, 930 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 931 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 932 933 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 934 unsigned TagSpec, SourceLocation TagLoc, 935 CXXScopeSpec &SS, 936 IdentifierInfo *Name, SourceLocation NameLoc, 937 AttributeList *Attr, 938 MultiTemplateParamsArg TempParamLists); 939 940 TypeResult ActOnDependentTag(Scope *S, 941 unsigned TagSpec, 942 TagUseKind TUK, 943 const CXXScopeSpec &SS, 944 IdentifierInfo *Name, 945 SourceLocation TagLoc, 946 SourceLocation NameLoc); 947 948 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 949 IdentifierInfo *ClassName, 950 llvm::SmallVectorImpl<Decl *> &Decls); 951 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 952 Declarator &D, Expr *BitfieldWidth); 953 954 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 955 Declarator &D, Expr *BitfieldWidth, 956 AccessSpecifier AS); 957 958 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 959 TypeSourceInfo *TInfo, 960 RecordDecl *Record, SourceLocation Loc, 961 bool Mutable, Expr *BitfieldWidth, 962 SourceLocation TSSL, 963 AccessSpecifier AS, NamedDecl *PrevDecl, 964 Declarator *D = 0); 965 966 enum CXXSpecialMember { 967 CXXInvalid = -1, 968 CXXConstructor = 0, 969 CXXCopyConstructor = 1, 970 CXXCopyAssignment = 2, 971 CXXDestructor = 3 972 }; 973 bool CheckNontrivialField(FieldDecl *FD); 974 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 975 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 976 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 977 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 978 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 979 Declarator &D, Expr *BitfieldWidth, 980 tok::ObjCKeywordKind visibility); 981 982 // This is used for both record definitions and ObjC interface declarations. 983 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 984 Decl **Fields, unsigned NumFields, 985 SourceLocation LBrac, SourceLocation RBrac, 986 AttributeList *AttrList); 987 988 /// ActOnTagStartDefinition - Invoked when we have entered the 989 /// scope of a tag's definition (e.g., for an enumeration, class, 990 /// struct, or union). 991 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 992 993 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 994 /// C++ record definition's base-specifiers clause and are starting its 995 /// member declarations. 996 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 997 ClassVirtSpecifiers &CVS, 998 SourceLocation LBraceLoc); 999 1000 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1001 /// the definition of a tag (enumeration, class, struct, or union). 1002 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1003 SourceLocation RBraceLoc); 1004 1005 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1006 /// error parsing the definition of a tag. 1007 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1008 1009 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1010 EnumConstantDecl *LastEnumConst, 1011 SourceLocation IdLoc, 1012 IdentifierInfo *Id, 1013 Expr *val); 1014 1015 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1016 SourceLocation IdLoc, IdentifierInfo *Id, 1017 AttributeList *Attrs, 1018 SourceLocation EqualLoc, Expr *Val); 1019 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1020 SourceLocation RBraceLoc, Decl *EnumDecl, 1021 Decl **Elements, unsigned NumElements, 1022 Scope *S, AttributeList *Attr); 1023 1024 DeclContext *getContainingDC(DeclContext *DC); 1025 1026 /// Set the current declaration context until it gets popped. 1027 void PushDeclContext(Scope *S, DeclContext *DC); 1028 void PopDeclContext(); 1029 1030 /// EnterDeclaratorContext - Used when we must lookup names in the context 1031 /// of a declarator's nested name specifier. 1032 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1033 void ExitDeclaratorContext(Scope *S); 1034 1035 DeclContext *getFunctionLevelDeclContext(); 1036 1037 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1038 /// to the function decl for the function being parsed. If we're currently 1039 /// in a 'block', this returns the containing context. 1040 FunctionDecl *getCurFunctionDecl(); 1041 1042 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1043 /// the method decl for the method being parsed. If we're currently 1044 /// in a 'block', this returns the containing context. 1045 ObjCMethodDecl *getCurMethodDecl(); 1046 1047 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1048 /// or C function we're in, otherwise return null. If we're currently 1049 /// in a 'block', this returns the containing context. 1050 NamedDecl *getCurFunctionOrMethodDecl(); 1051 1052 /// Add this decl to the scope shadowed decl chains. 1053 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1054 1055 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1056 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1057 /// true if 'D' belongs to the given declaration context. 1058 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0); 1059 1060 /// Finds the scope corresponding to the given decl context, if it 1061 /// happens to be an enclosing scope. Otherwise return NULL. 1062 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1063 1064 /// Subroutines of ActOnDeclarator(). 1065 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1066 TypeSourceInfo *TInfo); 1067 void MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls); 1068 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1069 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1070 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1071 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1072 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1073 1074 // AssignmentAction - This is used by all the assignment diagnostic functions 1075 // to represent what is actually causing the operation 1076 enum AssignmentAction { 1077 AA_Assigning, 1078 AA_Passing, 1079 AA_Returning, 1080 AA_Converting, 1081 AA_Initializing, 1082 AA_Sending, 1083 AA_Casting 1084 }; 1085 1086 /// C++ Overloading. 1087 enum OverloadKind { 1088 /// This is a legitimate overload: the existing declarations are 1089 /// functions or function templates with different signatures. 1090 Ovl_Overload, 1091 1092 /// This is not an overload because the signature exactly matches 1093 /// an existing declaration. 1094 Ovl_Match, 1095 1096 /// This is not an overload because the lookup results contain a 1097 /// non-function. 1098 Ovl_NonFunction 1099 }; 1100 OverloadKind CheckOverload(Scope *S, 1101 FunctionDecl *New, 1102 const LookupResult &OldDecls, 1103 NamedDecl *&OldDecl, 1104 bool IsForUsingDecl); 1105 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1106 1107 bool TryImplicitConversion(InitializationSequence &Sequence, 1108 const InitializedEntity &Entity, 1109 Expr *From, 1110 bool SuppressUserConversions, 1111 bool AllowExplicit, 1112 bool InOverloadResolution, 1113 bool CStyle); 1114 1115 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1116 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1117 bool IsComplexPromotion(QualType FromType, QualType ToType); 1118 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1119 bool InOverloadResolution, 1120 QualType& ConvertedType, bool &IncompatibleObjC); 1121 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1122 QualType& ConvertedType, bool &IncompatibleObjC); 1123 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1124 QualType& ConvertedType); 1125 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1126 const FunctionProtoType *NewType); 1127 1128 bool CheckPointerConversion(Expr *From, QualType ToType, 1129 CastKind &Kind, 1130 CXXCastPath& BasePath, 1131 bool IgnoreBaseAccess); 1132 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1133 bool InOverloadResolution, 1134 QualType &ConvertedType); 1135 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1136 CastKind &Kind, 1137 CXXCastPath &BasePath, 1138 bool IgnoreBaseAccess); 1139 bool IsQualificationConversion(QualType FromType, QualType ToType, 1140 bool CStyle); 1141 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1142 1143 1144 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1145 const VarDecl *NRVOCandidate, 1146 QualType ResultType, 1147 Expr *Value); 1148 1149 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1150 SourceLocation EqualLoc, 1151 ExprResult Init); 1152 bool PerformObjectArgumentInitialization(Expr *&From, 1153 NestedNameSpecifier *Qualifier, 1154 NamedDecl *FoundDecl, 1155 CXXMethodDecl *Method); 1156 1157 bool PerformContextuallyConvertToBool(Expr *&From); 1158 bool PerformContextuallyConvertToObjCId(Expr *&From); 1159 1160 ExprResult 1161 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1162 const PartialDiagnostic &NotIntDiag, 1163 const PartialDiagnostic &IncompleteDiag, 1164 const PartialDiagnostic &ExplicitConvDiag, 1165 const PartialDiagnostic &ExplicitConvNote, 1166 const PartialDiagnostic &AmbigDiag, 1167 const PartialDiagnostic &AmbigNote, 1168 const PartialDiagnostic &ConvDiag); 1169 1170 bool PerformObjectMemberConversion(Expr *&From, 1171 NestedNameSpecifier *Qualifier, 1172 NamedDecl *FoundDecl, 1173 NamedDecl *Member); 1174 1175 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1176 // TODO: make this is a typesafe union. 1177 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1178 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1179 1180 void AddOverloadCandidate(NamedDecl *Function, 1181 DeclAccessPair FoundDecl, 1182 Expr **Args, unsigned NumArgs, 1183 OverloadCandidateSet &CandidateSet); 1184 1185 void AddOverloadCandidate(FunctionDecl *Function, 1186 DeclAccessPair FoundDecl, 1187 Expr **Args, unsigned NumArgs, 1188 OverloadCandidateSet& CandidateSet, 1189 bool SuppressUserConversions = false, 1190 bool PartialOverloading = false); 1191 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1192 Expr **Args, unsigned NumArgs, 1193 OverloadCandidateSet& CandidateSet, 1194 bool SuppressUserConversions = false); 1195 void AddMethodCandidate(DeclAccessPair FoundDecl, 1196 QualType ObjectType, 1197 Expr::Classification ObjectClassification, 1198 Expr **Args, unsigned NumArgs, 1199 OverloadCandidateSet& CandidateSet, 1200 bool SuppressUserConversion = false); 1201 void AddMethodCandidate(CXXMethodDecl *Method, 1202 DeclAccessPair FoundDecl, 1203 CXXRecordDecl *ActingContext, QualType ObjectType, 1204 Expr::Classification ObjectClassification, 1205 Expr **Args, unsigned NumArgs, 1206 OverloadCandidateSet& CandidateSet, 1207 bool SuppressUserConversions = false); 1208 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1209 DeclAccessPair FoundDecl, 1210 CXXRecordDecl *ActingContext, 1211 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1212 QualType ObjectType, 1213 Expr::Classification ObjectClassification, 1214 Expr **Args, unsigned NumArgs, 1215 OverloadCandidateSet& CandidateSet, 1216 bool SuppressUserConversions = false); 1217 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1218 DeclAccessPair FoundDecl, 1219 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1220 Expr **Args, unsigned NumArgs, 1221 OverloadCandidateSet& CandidateSet, 1222 bool SuppressUserConversions = false); 1223 void AddConversionCandidate(CXXConversionDecl *Conversion, 1224 DeclAccessPair FoundDecl, 1225 CXXRecordDecl *ActingContext, 1226 Expr *From, QualType ToType, 1227 OverloadCandidateSet& CandidateSet); 1228 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1229 DeclAccessPair FoundDecl, 1230 CXXRecordDecl *ActingContext, 1231 Expr *From, QualType ToType, 1232 OverloadCandidateSet &CandidateSet); 1233 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1234 DeclAccessPair FoundDecl, 1235 CXXRecordDecl *ActingContext, 1236 const FunctionProtoType *Proto, 1237 Expr *Object, Expr **Args, unsigned NumArgs, 1238 OverloadCandidateSet& CandidateSet); 1239 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1240 SourceLocation OpLoc, 1241 Expr **Args, unsigned NumArgs, 1242 OverloadCandidateSet& CandidateSet, 1243 SourceRange OpRange = SourceRange()); 1244 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1245 Expr **Args, unsigned NumArgs, 1246 OverloadCandidateSet& CandidateSet, 1247 bool IsAssignmentOperator = false, 1248 unsigned NumContextualBoolArguments = 0); 1249 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1250 SourceLocation OpLoc, 1251 Expr **Args, unsigned NumArgs, 1252 OverloadCandidateSet& CandidateSet); 1253 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1254 bool Operator, 1255 Expr **Args, unsigned NumArgs, 1256 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1257 OverloadCandidateSet& CandidateSet, 1258 bool PartialOverloading = false); 1259 1260 // Emit as a 'note' the specific overload candidate 1261 void NoteOverloadCandidate(FunctionDecl *Fn); 1262 1263 // Emit as a series of 'note's all template and non-templates 1264 // identified by the expression Expr 1265 void NoteAllOverloadCandidates(Expr* E); 1266 1267 // [PossiblyAFunctionType] --> [Return] 1268 // NonFunctionType --> NonFunctionType 1269 // R (A) --> R(A) 1270 // R (*)(A) --> R (A) 1271 // R (&)(A) --> R (A) 1272 // R (S::*)(A) --> R (A) 1273 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1274 1275 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1276 bool Complain, 1277 DeclAccessPair &Found); 1278 1279 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1280 bool Complain = false, 1281 DeclAccessPair* Found = 0); 1282 1283 Expr *FixOverloadedFunctionReference(Expr *E, 1284 DeclAccessPair FoundDecl, 1285 FunctionDecl *Fn); 1286 ExprResult FixOverloadedFunctionReference(ExprResult, 1287 DeclAccessPair FoundDecl, 1288 FunctionDecl *Fn); 1289 1290 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1291 Expr **Args, unsigned NumArgs, 1292 OverloadCandidateSet &CandidateSet, 1293 bool PartialOverloading = false); 1294 1295 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1296 UnresolvedLookupExpr *ULE, 1297 SourceLocation LParenLoc, 1298 Expr **Args, unsigned NumArgs, 1299 SourceLocation RParenLoc, 1300 Expr *ExecConfig); 1301 1302 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1303 unsigned Opc, 1304 const UnresolvedSetImpl &Fns, 1305 Expr *input); 1306 1307 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1308 unsigned Opc, 1309 const UnresolvedSetImpl &Fns, 1310 Expr *LHS, Expr *RHS); 1311 1312 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1313 SourceLocation RLoc, 1314 Expr *Base,Expr *Idx); 1315 1316 ExprResult 1317 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1318 SourceLocation LParenLoc, Expr **Args, 1319 unsigned NumArgs, SourceLocation RParenLoc); 1320 ExprResult 1321 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1322 Expr **Args, unsigned NumArgs, 1323 SourceLocation RParenLoc); 1324 1325 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1326 SourceLocation OpLoc); 1327 1328 /// CheckCallReturnType - Checks that a call expression's return type is 1329 /// complete. Returns true on failure. The location passed in is the location 1330 /// that best represents the call. 1331 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1332 CallExpr *CE, FunctionDecl *FD); 1333 1334 /// Helpers for dealing with blocks and functions. 1335 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1336 bool CheckParameterNames); 1337 void CheckCXXDefaultArguments(FunctionDecl *FD); 1338 void CheckExtraCXXDefaultArguments(Declarator &D); 1339 Scope *getNonFieldDeclScope(Scope *S); 1340 1341 /// \name Name lookup 1342 /// 1343 /// These routines provide name lookup that is used during semantic 1344 /// analysis to resolve the various kinds of names (identifiers, 1345 /// overloaded operator names, constructor names, etc.) into zero or 1346 /// more declarations within a particular scope. The major entry 1347 /// points are LookupName, which performs unqualified name lookup, 1348 /// and LookupQualifiedName, which performs qualified name lookup. 1349 /// 1350 /// All name lookup is performed based on some specific criteria, 1351 /// which specify what names will be visible to name lookup and how 1352 /// far name lookup should work. These criteria are important both 1353 /// for capturing language semantics (certain lookups will ignore 1354 /// certain names, for example) and for performance, since name 1355 /// lookup is often a bottleneck in the compilation of C++. Name 1356 /// lookup criteria is specified via the LookupCriteria enumeration. 1357 /// 1358 /// The results of name lookup can vary based on the kind of name 1359 /// lookup performed, the current language, and the translation 1360 /// unit. In C, for example, name lookup will either return nothing 1361 /// (no entity found) or a single declaration. In C++, name lookup 1362 /// can additionally refer to a set of overloaded functions or 1363 /// result in an ambiguity. All of the possible results of name 1364 /// lookup are captured by the LookupResult class, which provides 1365 /// the ability to distinguish among them. 1366 //@{ 1367 1368 /// @brief Describes the kind of name lookup to perform. 1369 enum LookupNameKind { 1370 /// Ordinary name lookup, which finds ordinary names (functions, 1371 /// variables, typedefs, etc.) in C and most kinds of names 1372 /// (functions, variables, members, types, etc.) in C++. 1373 LookupOrdinaryName = 0, 1374 /// Tag name lookup, which finds the names of enums, classes, 1375 /// structs, and unions. 1376 LookupTagName, 1377 /// Label name lookup. 1378 LookupLabel, 1379 /// Member name lookup, which finds the names of 1380 /// class/struct/union members. 1381 LookupMemberName, 1382 /// Look up of an operator name (e.g., operator+) for use with 1383 /// operator overloading. This lookup is similar to ordinary name 1384 /// lookup, but will ignore any declarations that are class members. 1385 LookupOperatorName, 1386 /// Look up of a name that precedes the '::' scope resolution 1387 /// operator in C++. This lookup completely ignores operator, object, 1388 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1389 LookupNestedNameSpecifierName, 1390 /// Look up a namespace name within a C++ using directive or 1391 /// namespace alias definition, ignoring non-namespace names (C++ 1392 /// [basic.lookup.udir]p1). 1393 LookupNamespaceName, 1394 /// Look up all declarations in a scope with the given name, 1395 /// including resolved using declarations. This is appropriate 1396 /// for checking redeclarations for a using declaration. 1397 LookupUsingDeclName, 1398 /// Look up an ordinary name that is going to be redeclared as a 1399 /// name with linkage. This lookup ignores any declarations that 1400 /// are outside of the current scope unless they have linkage. See 1401 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1402 LookupRedeclarationWithLinkage, 1403 /// Look up the name of an Objective-C protocol. 1404 LookupObjCProtocolName, 1405 /// \brief Look up any declaration with any name. 1406 LookupAnyName 1407 }; 1408 1409 /// \brief Specifies whether (or how) name lookup is being performed for a 1410 /// redeclaration (vs. a reference). 1411 enum RedeclarationKind { 1412 /// \brief The lookup is a reference to this name that is not for the 1413 /// purpose of redeclaring the name. 1414 NotForRedeclaration = 0, 1415 /// \brief The lookup results will be used for redeclaration of a name, 1416 /// if an entity by that name already exists. 1417 ForRedeclaration 1418 }; 1419 1420private: 1421 bool CppLookupName(LookupResult &R, Scope *S); 1422 1423public: 1424 /// \brief Look up a name, looking for a single declaration. Return 1425 /// null if the results were absent, ambiguous, or overloaded. 1426 /// 1427 /// It is preferable to use the elaborated form and explicitly handle 1428 /// ambiguity and overloaded. 1429 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1430 SourceLocation Loc, 1431 LookupNameKind NameKind, 1432 RedeclarationKind Redecl 1433 = NotForRedeclaration); 1434 bool LookupName(LookupResult &R, Scope *S, 1435 bool AllowBuiltinCreation = false); 1436 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1437 bool InUnqualifiedLookup = false); 1438 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1439 bool AllowBuiltinCreation = false, 1440 bool EnteringContext = false); 1441 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1442 1443 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1444 QualType T1, QualType T2, 1445 UnresolvedSetImpl &Functions); 1446 1447 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation Loc, 1448 bool isLocalLabel = false); 1449 1450 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1451 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1452 1453 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1454 Expr **Args, unsigned NumArgs, 1455 ADLResult &Functions); 1456 1457 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1458 VisibleDeclConsumer &Consumer, 1459 bool IncludeGlobalScope = true); 1460 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1461 VisibleDeclConsumer &Consumer, 1462 bool IncludeGlobalScope = true); 1463 1464 /// \brief The context in which typo-correction occurs. 1465 /// 1466 /// The typo-correction context affects which keywords (if any) are 1467 /// considered when trying to correct for typos. 1468 enum CorrectTypoContext { 1469 /// \brief An unknown context, where any keyword might be valid. 1470 CTC_Unknown, 1471 /// \brief A context where no keywords are used (e.g. we expect an actual 1472 /// name). 1473 CTC_NoKeywords, 1474 /// \brief A context where we're correcting a type name. 1475 CTC_Type, 1476 /// \brief An expression context. 1477 CTC_Expression, 1478 /// \brief A type cast, or anything else that can be followed by a '<'. 1479 CTC_CXXCasts, 1480 /// \brief A member lookup context. 1481 CTC_MemberLookup, 1482 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1483 CTC_ObjCIvarLookup, 1484 /// \brief An Objective-C property lookup context (e.g., self.prop). 1485 CTC_ObjCPropertyLookup, 1486 /// \brief The receiver of an Objective-C message send within an 1487 /// Objective-C method where 'super' is a valid keyword. 1488 CTC_ObjCMessageReceiver 1489 }; 1490 1491 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1492 DeclContext *MemberContext = 0, 1493 bool EnteringContext = false, 1494 CorrectTypoContext CTC = CTC_Unknown, 1495 const ObjCObjectPointerType *OPT = 0); 1496 1497 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1498 AssociatedNamespaceSet &AssociatedNamespaces, 1499 AssociatedClassSet &AssociatedClasses); 1500 1501 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1502 //@} 1503 1504 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1505 SourceLocation IdLoc, 1506 bool TypoCorrection = false); 1507 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1508 Scope *S, bool ForRedeclaration, 1509 SourceLocation Loc); 1510 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1511 Scope *S); 1512 void AddKnownFunctionAttributes(FunctionDecl *FD); 1513 1514 // More parsing and symbol table subroutines. 1515 1516 // Decl attributes - this routine is the top level dispatcher. 1517 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1518 bool NonInheritable = true, bool Inheritable = true); 1519 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1520 bool NonInheritable = true, bool Inheritable = true); 1521 1522 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1523 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1524 bool CheckNoReturnAttr(const AttributeList &attr); 1525 1526 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1527 bool &IncompleteImpl, unsigned DiagID); 1528 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1529 ObjCMethodDecl *MethodDecl, 1530 bool IsProtocolMethodDecl); 1531 1532 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1533 ObjCInterfaceDecl *IDecl); 1534 1535 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1536 1537 /// CheckProtocolMethodDefs - This routine checks unimplemented 1538 /// methods declared in protocol, and those referenced by it. 1539 /// \param IDecl - Used for checking for methods which may have been 1540 /// inherited. 1541 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1542 ObjCProtocolDecl *PDecl, 1543 bool& IncompleteImpl, 1544 const SelectorSet &InsMap, 1545 const SelectorSet &ClsMap, 1546 ObjCContainerDecl *CDecl); 1547 1548 /// CheckImplementationIvars - This routine checks if the instance variables 1549 /// listed in the implelementation match those listed in the interface. 1550 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1551 ObjCIvarDecl **Fields, unsigned nIvars, 1552 SourceLocation Loc); 1553 1554 /// \brief Determine whether we can synthesize a provisional ivar for the 1555 /// given name. 1556 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1557 1558 /// \brief Determine whether we can synthesize a provisional ivar for the 1559 /// given property. 1560 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1561 1562 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1563 /// remains unimplemented in the class or category @implementation. 1564 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1565 ObjCContainerDecl* IDecl, 1566 bool IncompleteImpl = false); 1567 1568 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1569 /// which must be implemented by this implementation. 1570 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1571 ObjCContainerDecl *CDecl, 1572 const SelectorSet &InsMap); 1573 1574 /// DefaultSynthesizeProperties - This routine default synthesizes all 1575 /// properties which must be synthesized in class's @implementation. 1576 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1577 ObjCInterfaceDecl *IDecl); 1578 1579 /// CollectImmediateProperties - This routine collects all properties in 1580 /// the class and its conforming protocols; but not those it its super class. 1581 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1582 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1583 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1584 1585 1586 /// LookupPropertyDecl - Looks up a property in the current class and all 1587 /// its protocols. 1588 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1589 IdentifierInfo *II); 1590 1591 /// Called by ActOnProperty to handle @property declarations in 1592 //// class extensions. 1593 Decl *HandlePropertyInClassExtension(Scope *S, 1594 ObjCCategoryDecl *CDecl, 1595 SourceLocation AtLoc, 1596 FieldDeclarator &FD, 1597 Selector GetterSel, 1598 Selector SetterSel, 1599 const bool isAssign, 1600 const bool isReadWrite, 1601 const unsigned Attributes, 1602 bool *isOverridingProperty, 1603 TypeSourceInfo *T, 1604 tok::ObjCKeywordKind MethodImplKind); 1605 1606 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1607 /// handle creating the ObjcPropertyDecl for a category or @interface. 1608 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1609 ObjCContainerDecl *CDecl, 1610 SourceLocation AtLoc, 1611 FieldDeclarator &FD, 1612 Selector GetterSel, 1613 Selector SetterSel, 1614 const bool isAssign, 1615 const bool isReadWrite, 1616 const unsigned Attributes, 1617 TypeSourceInfo *T, 1618 tok::ObjCKeywordKind MethodImplKind, 1619 DeclContext *lexicalDC = 0); 1620 1621 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1622 /// warning) when atomic property has one but not the other user-declared 1623 /// setter or getter. 1624 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1625 ObjCContainerDecl* IDecl); 1626 1627 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1628 1629 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1630 /// true, or false, accordingly. 1631 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1632 const ObjCMethodDecl *PrevMethod, 1633 bool matchBasedOnSizeAndAlignment = false, 1634 bool matchBasedOnStrictEqulity = false); 1635 1636 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1637 /// or protocol against those declared in their implementations. 1638 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1639 const SelectorSet &ClsMap, 1640 SelectorSet &InsMapSeen, 1641 SelectorSet &ClsMapSeen, 1642 ObjCImplDecl* IMPDecl, 1643 ObjCContainerDecl* IDecl, 1644 bool &IncompleteImpl, 1645 bool ImmediateClass); 1646 1647private: 1648 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1649 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1650 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1651 1652 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1653 /// optionally warns if there are multiple signatures. 1654 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1655 bool receiverIdOrClass, 1656 bool warn, bool instance); 1657 1658public: 1659 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1660 /// unit are added to a global pool. This allows us to efficiently associate 1661 /// a selector with a method declaraation for purposes of typechecking 1662 /// messages sent to "id" (where the class of the object is unknown). 1663 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1664 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1665 } 1666 1667 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1668 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1669 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1670 } 1671 1672 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1673 /// there are multiple signatures. 1674 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1675 bool receiverIdOrClass=false, 1676 bool warn=true) { 1677 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1678 warn, /*instance*/true); 1679 } 1680 1681 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1682 /// there are multiple signatures. 1683 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1684 bool receiverIdOrClass=false, 1685 bool warn=true) { 1686 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1687 warn, /*instance*/false); 1688 } 1689 1690 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1691 /// implementation. 1692 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1693 1694 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1695 /// initialization. 1696 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1697 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1698 //===--------------------------------------------------------------------===// 1699 // Statement Parsing Callbacks: SemaStmt.cpp. 1700public: 1701 class FullExprArg { 1702 public: 1703 FullExprArg(Sema &actions) : E(0) { } 1704 1705 // FIXME: The const_cast here is ugly. RValue references would make this 1706 // much nicer (or we could duplicate a bunch of the move semantics 1707 // emulation code from Ownership.h). 1708 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1709 1710 ExprResult release() { 1711 return move(E); 1712 } 1713 1714 Expr *get() const { return E; } 1715 1716 Expr *operator->() { 1717 return E; 1718 } 1719 1720 private: 1721 // FIXME: No need to make the entire Sema class a friend when it's just 1722 // Sema::MakeFullExpr that needs access to the constructor below. 1723 friend class Sema; 1724 1725 explicit FullExprArg(Expr *expr) : E(expr) {} 1726 1727 Expr *E; 1728 }; 1729 1730 FullExprArg MakeFullExpr(Expr *Arg) { 1731 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1732 } 1733 1734 StmtResult ActOnExprStmt(FullExprArg Expr); 1735 1736 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1737 bool LeadingEmptyMacro = false); 1738 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1739 MultiStmtArg Elts, 1740 bool isStmtExpr); 1741 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1742 SourceLocation StartLoc, 1743 SourceLocation EndLoc); 1744 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1745 StmtResult ActOnForEachLValueExpr(Expr *E); 1746 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1747 SourceLocation DotDotDotLoc, Expr *RHSVal, 1748 SourceLocation ColonLoc); 1749 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1750 1751 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1752 SourceLocation ColonLoc, 1753 Stmt *SubStmt, Scope *CurScope); 1754 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1755 SourceLocation ColonLoc, Stmt *SubStmt); 1756 1757 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1758 FullExprArg CondVal, Decl *CondVar, 1759 Stmt *ThenVal, 1760 SourceLocation ElseLoc, Stmt *ElseVal); 1761 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1762 Expr *Cond, 1763 Decl *CondVar); 1764 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1765 Stmt *Switch, Stmt *Body); 1766 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1767 FullExprArg Cond, 1768 Decl *CondVar, Stmt *Body); 1769 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1770 SourceLocation WhileLoc, 1771 SourceLocation CondLParen, Expr *Cond, 1772 SourceLocation CondRParen); 1773 1774 StmtResult ActOnForStmt(SourceLocation ForLoc, 1775 SourceLocation LParenLoc, 1776 Stmt *First, FullExprArg Second, 1777 Decl *SecondVar, 1778 FullExprArg Third, 1779 SourceLocation RParenLoc, 1780 Stmt *Body); 1781 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1782 SourceLocation LParenLoc, 1783 Stmt *First, Expr *Second, 1784 SourceLocation RParenLoc, Stmt *Body); 1785 1786 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1787 SourceLocation LabelLoc, 1788 LabelDecl *TheDecl); 1789 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1790 SourceLocation StarLoc, 1791 Expr *DestExp); 1792 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1793 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1794 1795 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1796 bool AllowFunctionParameters); 1797 1798 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1799 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1800 1801 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1802 bool IsSimple, bool IsVolatile, 1803 unsigned NumOutputs, unsigned NumInputs, 1804 IdentifierInfo **Names, 1805 MultiExprArg Constraints, 1806 MultiExprArg Exprs, 1807 Expr *AsmString, 1808 MultiExprArg Clobbers, 1809 SourceLocation RParenLoc, 1810 bool MSAsm = false); 1811 1812 1813 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1814 IdentifierInfo *Name, SourceLocation NameLoc, 1815 bool Invalid = false); 1816 1817 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1818 1819 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1820 Decl *Parm, Stmt *Body); 1821 1822 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1823 1824 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1825 MultiStmtArg Catch, Stmt *Finally); 1826 1827 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1828 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1829 Scope *CurScope); 1830 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1831 Expr *SynchExpr, 1832 Stmt *SynchBody); 1833 1834 VarDecl *BuildExceptionDeclaration(Scope *S, 1835 TypeSourceInfo *TInfo, 1836 IdentifierInfo *Name, 1837 SourceLocation Loc); 1838 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1839 1840 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1841 Decl *ExDecl, Stmt *HandlerBlock); 1842 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1843 MultiStmtArg Handlers); 1844 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1845 1846 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1847 1848 /// \brief If it's a file scoped decl that must warn if not used, keep track 1849 /// of it. 1850 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1851 1852 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1853 /// whose result is unused, warn. 1854 void DiagnoseUnusedExprResult(const Stmt *S); 1855 void DiagnoseUnusedDecl(const NamedDecl *ND); 1856 1857 ParsingDeclState PushParsingDeclaration() { 1858 return DelayedDiagnostics.pushParsingDecl(); 1859 } 1860 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 1861 DelayedDiagnostics::popParsingDecl(*this, state, decl); 1862 } 1863 1864 typedef ProcessingContextState ParsingClassState; 1865 ParsingClassState PushParsingClass() { 1866 return DelayedDiagnostics.pushContext(); 1867 } 1868 void PopParsingClass(ParsingClassState state) { 1869 DelayedDiagnostics.popContext(state); 1870 } 1871 1872 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1873 SourceLocation Loc, bool UnknownObjCClass=false); 1874 1875 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1876 1877 //===--------------------------------------------------------------------===// 1878 // Expression Parsing Callbacks: SemaExpr.cpp. 1879 1880 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1881 bool UnknownObjCClass=false); 1882 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1883 ObjCMethodDecl *Getter, 1884 SourceLocation Loc); 1885 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1886 Expr **Args, unsigned NumArgs); 1887 1888 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1889 1890 void PopExpressionEvaluationContext(); 1891 1892 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1893 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1894 void MarkDeclarationsReferencedInExpr(Expr *E); 1895 1896 /// \brief Conditionally issue a diagnostic based on the current 1897 /// evaluation context. 1898 /// 1899 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 1900 /// the function body is parsed, and then do a basic reachability analysis to 1901 /// determine if the statement is reachable. If it is unreachable, the 1902 /// diagnostic will not be emitted. 1903 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 1904 const PartialDiagnostic &PD); 1905 1906 // Primary Expressions. 1907 SourceRange getExprRange(Expr *E) const; 1908 1909 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1910 bool HasTrailingLParen, bool IsAddressOfOperand); 1911 1912 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1913 CorrectTypoContext CTC = CTC_Unknown); 1914 1915 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1916 bool AllowBuiltinCreation=false); 1917 1918 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1919 const DeclarationNameInfo &NameInfo, 1920 bool isAddressOfOperand, 1921 const TemplateArgumentListInfo *TemplateArgs); 1922 1923 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1924 ExprValueKind VK, 1925 SourceLocation Loc, 1926 const CXXScopeSpec *SS = 0); 1927 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1928 ExprValueKind VK, 1929 const DeclarationNameInfo &NameInfo, 1930 const CXXScopeSpec *SS = 0); 1931 ExprResult 1932 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 1933 SourceLocation nameLoc, 1934 IndirectFieldDecl *indirectField, 1935 Expr *baseObjectExpr = 0, 1936 SourceLocation opLoc = SourceLocation()); 1937 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1938 LookupResult &R, 1939 const TemplateArgumentListInfo *TemplateArgs); 1940 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1941 LookupResult &R, 1942 const TemplateArgumentListInfo *TemplateArgs, 1943 bool IsDefiniteInstance); 1944 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1945 const LookupResult &R, 1946 bool HasTrailingLParen); 1947 1948 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1949 const DeclarationNameInfo &NameInfo); 1950 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1951 const DeclarationNameInfo &NameInfo, 1952 const TemplateArgumentListInfo *TemplateArgs); 1953 1954 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1955 LookupResult &R, 1956 bool ADL); 1957 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1958 const DeclarationNameInfo &NameInfo, 1959 NamedDecl *D); 1960 1961 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 1962 ExprResult ActOnNumericConstant(const Token &); 1963 ExprResult ActOnCharacterConstant(const Token &); 1964 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 1965 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 1966 SourceLocation R, 1967 MultiExprArg Val, 1968 ParsedType TypeOfCast = ParsedType()); 1969 1970 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 1971 /// fragments (e.g. "foo" "bar" L"baz"). 1972 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 1973 1974 // Binary/Unary Operators. 'Tok' is the token for the operator. 1975 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 1976 Expr *InputArg); 1977 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 1978 UnaryOperatorKind Opc, Expr *input); 1979 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 1980 tok::TokenKind Op, Expr *Input); 1981 1982 ExprResult CreateSizeOfAlignOfExpr(TypeSourceInfo *T, 1983 SourceLocation OpLoc, 1984 bool isSizeOf, SourceRange R); 1985 ExprResult CreateSizeOfAlignOfExpr(Expr *E, SourceLocation OpLoc, 1986 bool isSizeOf, SourceRange R); 1987 ExprResult 1988 ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType, 1989 void *TyOrEx, const SourceRange &ArgRange); 1990 1991 ExprResult CheckPlaceholderExpr(Expr *E, SourceLocation Loc); 1992 1993 bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc, 1994 SourceRange R, bool isSizeof); 1995 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 1996 SourceLocation OpLoc, 1997 IdentifierInfo &Name, 1998 SourceLocation NameLoc, 1999 SourceLocation RParenLoc); 2000 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2001 tok::TokenKind Kind, Expr *Input); 2002 2003 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2004 Expr *Idx, SourceLocation RLoc); 2005 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2006 Expr *Idx, SourceLocation RLoc); 2007 2008 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2009 SourceLocation OpLoc, bool IsArrow, 2010 CXXScopeSpec &SS, 2011 NamedDecl *FirstQualifierInScope, 2012 const DeclarationNameInfo &NameInfo, 2013 const TemplateArgumentListInfo *TemplateArgs); 2014 2015 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2016 SourceLocation OpLoc, bool IsArrow, 2017 const CXXScopeSpec &SS, 2018 NamedDecl *FirstQualifierInScope, 2019 LookupResult &R, 2020 const TemplateArgumentListInfo *TemplateArgs, 2021 bool SuppressQualifierCheck = false); 2022 2023 ExprResult LookupMemberExpr(LookupResult &R, Expr *&Base, 2024 bool &IsArrow, SourceLocation OpLoc, 2025 CXXScopeSpec &SS, 2026 Decl *ObjCImpDecl, 2027 bool HasTemplateArgs); 2028 2029 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2030 const CXXScopeSpec &SS, 2031 const LookupResult &R); 2032 2033 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2034 bool IsArrow, SourceLocation OpLoc, 2035 const CXXScopeSpec &SS, 2036 NamedDecl *FirstQualifierInScope, 2037 const DeclarationNameInfo &NameInfo, 2038 const TemplateArgumentListInfo *TemplateArgs); 2039 2040 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2041 SourceLocation OpLoc, 2042 tok::TokenKind OpKind, 2043 CXXScopeSpec &SS, 2044 UnqualifiedId &Member, 2045 Decl *ObjCImpDecl, 2046 bool HasTrailingLParen); 2047 2048 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2049 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2050 FunctionDecl *FDecl, 2051 const FunctionProtoType *Proto, 2052 Expr **Args, unsigned NumArgs, 2053 SourceLocation RParenLoc); 2054 2055 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2056 /// This provides the location of the left/right parens and a list of comma 2057 /// locations. 2058 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2059 MultiExprArg Args, SourceLocation RParenLoc, 2060 Expr *ExecConfig = 0); 2061 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2062 SourceLocation LParenLoc, 2063 Expr **Args, unsigned NumArgs, 2064 SourceLocation RParenLoc, 2065 Expr *ExecConfig = 0); 2066 2067 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2068 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2069 2070 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2071 ParsedType Ty, SourceLocation RParenLoc, 2072 Expr *Op); 2073 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2074 TypeSourceInfo *Ty, 2075 SourceLocation RParenLoc, 2076 Expr *Op); 2077 2078 bool TypeIsVectorType(ParsedType Ty) { 2079 return GetTypeFromParser(Ty)->isVectorType(); 2080 } 2081 2082 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2083 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2084 SourceLocation RParenLoc, Expr *E, 2085 TypeSourceInfo *TInfo); 2086 2087 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2088 ParsedType Ty, 2089 SourceLocation RParenLoc, 2090 Expr *Op); 2091 2092 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2093 TypeSourceInfo *TInfo, 2094 SourceLocation RParenLoc, 2095 Expr *InitExpr); 2096 2097 ExprResult ActOnInitList(SourceLocation LParenLoc, 2098 MultiExprArg InitList, 2099 SourceLocation RParenLoc); 2100 2101 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2102 SourceLocation Loc, 2103 bool GNUSyntax, 2104 ExprResult Init); 2105 2106 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2107 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2108 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2109 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2110 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2111 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2112 2113 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2114 /// in the case of a the GNU conditional expr extension. 2115 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2116 SourceLocation ColonLoc, 2117 Expr *Cond, Expr *LHS, Expr *RHS); 2118 2119 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2120 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2121 LabelDecl *LD); 2122 2123 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2124 SourceLocation RPLoc); // "({..})" 2125 2126 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2127 struct OffsetOfComponent { 2128 SourceLocation LocStart, LocEnd; 2129 bool isBrackets; // true if [expr], false if .ident 2130 union { 2131 IdentifierInfo *IdentInfo; 2132 ExprTy *E; 2133 } U; 2134 }; 2135 2136 /// __builtin_offsetof(type, a.b[123][456].c) 2137 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2138 TypeSourceInfo *TInfo, 2139 OffsetOfComponent *CompPtr, 2140 unsigned NumComponents, 2141 SourceLocation RParenLoc); 2142 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2143 SourceLocation BuiltinLoc, 2144 SourceLocation TypeLoc, 2145 ParsedType Arg1, 2146 OffsetOfComponent *CompPtr, 2147 unsigned NumComponents, 2148 SourceLocation RParenLoc); 2149 2150 // __builtin_choose_expr(constExpr, expr1, expr2) 2151 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2152 Expr *cond, Expr *expr1, 2153 Expr *expr2, SourceLocation RPLoc); 2154 2155 // __builtin_va_arg(expr, type) 2156 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2157 Expr *expr, ParsedType type, 2158 SourceLocation RPLoc); 2159 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2160 Expr *expr, TypeSourceInfo *TInfo, 2161 SourceLocation RPLoc); 2162 2163 // __null 2164 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2165 2166 //===------------------------- "Block" Extension ------------------------===// 2167 2168 /// ActOnBlockStart - This callback is invoked when a block literal is 2169 /// started. 2170 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2171 2172 /// ActOnBlockArguments - This callback allows processing of block arguments. 2173 /// If there are no arguments, this is still invoked. 2174 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2175 2176 /// ActOnBlockError - If there is an error parsing a block, this callback 2177 /// is invoked to pop the information about the block from the action impl. 2178 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2179 2180 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2181 /// literal was successfully completed. ^(int x){...} 2182 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2183 Stmt *Body, Scope *CurScope); 2184 2185 //===---------------------------- C++ Features --------------------------===// 2186 2187 // Act on C++ namespaces 2188 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2189 SourceLocation IdentLoc, 2190 IdentifierInfo *Ident, 2191 SourceLocation LBrace, 2192 AttributeList *AttrList); 2193 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2194 2195 NamespaceDecl *getStdNamespace() const; 2196 NamespaceDecl *getOrCreateStdNamespace(); 2197 2198 CXXRecordDecl *getStdBadAlloc() const; 2199 2200 Decl *ActOnUsingDirective(Scope *CurScope, 2201 SourceLocation UsingLoc, 2202 SourceLocation NamespcLoc, 2203 CXXScopeSpec &SS, 2204 SourceLocation IdentLoc, 2205 IdentifierInfo *NamespcName, 2206 AttributeList *AttrList); 2207 2208 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2209 2210 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2211 SourceLocation NamespaceLoc, 2212 SourceLocation AliasLoc, 2213 IdentifierInfo *Alias, 2214 CXXScopeSpec &SS, 2215 SourceLocation IdentLoc, 2216 IdentifierInfo *Ident); 2217 2218 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2219 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2220 const LookupResult &PreviousDecls); 2221 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2222 NamedDecl *Target); 2223 2224 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2225 bool isTypeName, 2226 const CXXScopeSpec &SS, 2227 SourceLocation NameLoc, 2228 const LookupResult &Previous); 2229 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2230 const CXXScopeSpec &SS, 2231 SourceLocation NameLoc); 2232 2233 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2234 SourceLocation UsingLoc, 2235 CXXScopeSpec &SS, 2236 const DeclarationNameInfo &NameInfo, 2237 AttributeList *AttrList, 2238 bool IsInstantiation, 2239 bool IsTypeName, 2240 SourceLocation TypenameLoc); 2241 2242 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2243 2244 Decl *ActOnUsingDeclaration(Scope *CurScope, 2245 AccessSpecifier AS, 2246 bool HasUsingKeyword, 2247 SourceLocation UsingLoc, 2248 CXXScopeSpec &SS, 2249 UnqualifiedId &Name, 2250 AttributeList *AttrList, 2251 bool IsTypeName, 2252 SourceLocation TypenameLoc); 2253 2254 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2255 /// ActOnDeclarator, when a C++ direct initializer is present. 2256 /// e.g: "int x(1);" 2257 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2258 SourceLocation LParenLoc, 2259 MultiExprArg Exprs, 2260 SourceLocation RParenLoc, 2261 bool TypeMayContainAuto); 2262 2263 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2264 /// and sets it as the initializer for the the passed in VarDecl. 2265 bool InitializeVarWithConstructor(VarDecl *VD, 2266 CXXConstructorDecl *Constructor, 2267 MultiExprArg Exprs); 2268 2269 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2270 /// including handling of its default argument expressions. 2271 /// 2272 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2273 ExprResult 2274 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2275 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2276 bool RequiresZeroInit, unsigned ConstructKind, 2277 SourceRange ParenRange); 2278 2279 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2280 // the constructor can be elidable? 2281 ExprResult 2282 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2283 CXXConstructorDecl *Constructor, bool Elidable, 2284 MultiExprArg Exprs, bool RequiresZeroInit, 2285 unsigned ConstructKind, 2286 SourceRange ParenRange); 2287 2288 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2289 /// the default expr if needed. 2290 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2291 FunctionDecl *FD, 2292 ParmVarDecl *Param); 2293 2294 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2295 /// constructed variable. 2296 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2297 2298 /// \brief Declare the implicit default constructor for the given class. 2299 /// 2300 /// \param ClassDecl The class declaration into which the implicit 2301 /// default constructor will be added. 2302 /// 2303 /// \returns The implicitly-declared default constructor. 2304 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2305 CXXRecordDecl *ClassDecl); 2306 2307 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2308 /// defining this constructor as the default constructor. 2309 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2310 CXXConstructorDecl *Constructor); 2311 2312 /// \brief Declare the implicit destructor for the given class. 2313 /// 2314 /// \param ClassDecl The class declaration into which the implicit 2315 /// destructor will be added. 2316 /// 2317 /// \returns The implicitly-declared destructor. 2318 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2319 2320 /// DefineImplicitDestructor - Checks for feasibility of 2321 /// defining this destructor as the default destructor. 2322 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2323 CXXDestructorDecl *Destructor); 2324 2325 /// \brief Declare all inherited constructors for the given class. 2326 /// 2327 /// \param ClassDecl The class declaration into which the inherited 2328 /// constructors will be added. 2329 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2330 2331 /// \brief Declare the implicit copy constructor for the given class. 2332 /// 2333 /// \param S The scope of the class, which may be NULL if this is a 2334 /// template instantiation. 2335 /// 2336 /// \param ClassDecl The class declaration into which the implicit 2337 /// copy constructor will be added. 2338 /// 2339 /// \returns The implicitly-declared copy constructor. 2340 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2341 2342 /// DefineImplicitCopyConstructor - Checks for feasibility of 2343 /// defining this constructor as the copy constructor. 2344 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2345 CXXConstructorDecl *Constructor, 2346 unsigned TypeQuals); 2347 2348 /// \brief Declare the implicit copy assignment operator for the given class. 2349 /// 2350 /// \param S The scope of the class, which may be NULL if this is a 2351 /// template instantiation. 2352 /// 2353 /// \param ClassDecl The class declaration into which the implicit 2354 /// copy-assignment operator will be added. 2355 /// 2356 /// \returns The implicitly-declared copy assignment operator. 2357 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2358 2359 /// \brief Defined an implicitly-declared copy assignment operator. 2360 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2361 CXXMethodDecl *MethodDecl); 2362 2363 /// \brief Force the declaration of any implicitly-declared members of this 2364 /// class. 2365 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2366 2367 /// MaybeBindToTemporary - If the passed in expression has a record type with 2368 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2369 /// it simply returns the passed in expression. 2370 ExprResult MaybeBindToTemporary(Expr *E); 2371 2372 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2373 MultiExprArg ArgsPtr, 2374 SourceLocation Loc, 2375 ASTOwningVector<Expr*> &ConvertedArgs); 2376 2377 ParsedType getDestructorName(SourceLocation TildeLoc, 2378 IdentifierInfo &II, SourceLocation NameLoc, 2379 Scope *S, CXXScopeSpec &SS, 2380 ParsedType ObjectType, 2381 bool EnteringContext); 2382 2383 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2384 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2385 tok::TokenKind Kind, 2386 SourceLocation LAngleBracketLoc, 2387 ParsedType Ty, 2388 SourceLocation RAngleBracketLoc, 2389 SourceLocation LParenLoc, 2390 Expr *E, 2391 SourceLocation RParenLoc); 2392 2393 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2394 tok::TokenKind Kind, 2395 TypeSourceInfo *Ty, 2396 Expr *E, 2397 SourceRange AngleBrackets, 2398 SourceRange Parens); 2399 2400 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2401 SourceLocation TypeidLoc, 2402 TypeSourceInfo *Operand, 2403 SourceLocation RParenLoc); 2404 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2405 SourceLocation TypeidLoc, 2406 Expr *Operand, 2407 SourceLocation RParenLoc); 2408 2409 /// ActOnCXXTypeid - Parse typeid( something ). 2410 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2411 SourceLocation LParenLoc, bool isType, 2412 void *TyOrExpr, 2413 SourceLocation RParenLoc); 2414 2415 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2416 SourceLocation TypeidLoc, 2417 TypeSourceInfo *Operand, 2418 SourceLocation RParenLoc); 2419 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2420 SourceLocation TypeidLoc, 2421 Expr *Operand, 2422 SourceLocation RParenLoc); 2423 2424 /// ActOnCXXUuidof - Parse __uuidof( something ). 2425 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2426 SourceLocation LParenLoc, bool isType, 2427 void *TyOrExpr, 2428 SourceLocation RParenLoc); 2429 2430 2431 //// ActOnCXXThis - Parse 'this' pointer. 2432 ExprResult ActOnCXXThis(SourceLocation loc); 2433 2434 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2435 /// pointer to an instance method whose 'this' pointer is 2436 /// capturable, or null if this is not possible. 2437 CXXMethodDecl *tryCaptureCXXThis(); 2438 2439 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2440 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2441 2442 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2443 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2444 2445 //// ActOnCXXThrow - Parse throw expressions. 2446 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2447 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E); 2448 2449 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2450 /// Can be interpreted either as function-style casting ("int(x)") 2451 /// or class type construction ("ClassType(x,y,z)") 2452 /// or creation of a value-initialized type ("int()"). 2453 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2454 SourceLocation LParenLoc, 2455 MultiExprArg Exprs, 2456 SourceLocation RParenLoc); 2457 2458 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2459 SourceLocation LParenLoc, 2460 MultiExprArg Exprs, 2461 SourceLocation RParenLoc); 2462 2463 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2464 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2465 SourceLocation PlacementLParen, 2466 MultiExprArg PlacementArgs, 2467 SourceLocation PlacementRParen, 2468 SourceRange TypeIdParens, Declarator &D, 2469 SourceLocation ConstructorLParen, 2470 MultiExprArg ConstructorArgs, 2471 SourceLocation ConstructorRParen); 2472 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2473 SourceLocation PlacementLParen, 2474 MultiExprArg PlacementArgs, 2475 SourceLocation PlacementRParen, 2476 SourceRange TypeIdParens, 2477 QualType AllocType, 2478 TypeSourceInfo *AllocTypeInfo, 2479 Expr *ArraySize, 2480 SourceLocation ConstructorLParen, 2481 MultiExprArg ConstructorArgs, 2482 SourceLocation ConstructorRParen, 2483 bool TypeMayContainAuto = true); 2484 2485 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2486 SourceRange R); 2487 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2488 bool UseGlobal, QualType AllocType, bool IsArray, 2489 Expr **PlaceArgs, unsigned NumPlaceArgs, 2490 FunctionDecl *&OperatorNew, 2491 FunctionDecl *&OperatorDelete); 2492 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2493 DeclarationName Name, Expr** Args, 2494 unsigned NumArgs, DeclContext *Ctx, 2495 bool AllowMissing, FunctionDecl *&Operator); 2496 void DeclareGlobalNewDelete(); 2497 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2498 QualType Argument, 2499 bool addMallocAttr = false); 2500 2501 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2502 DeclarationName Name, FunctionDecl* &Operator); 2503 2504 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2505 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2506 bool UseGlobal, bool ArrayForm, 2507 Expr *Operand); 2508 2509 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2510 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2511 SourceLocation StmtLoc, 2512 bool ConvertToBoolean); 2513 2514 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2515 Expr *Operand, SourceLocation RParen); 2516 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2517 SourceLocation RParen); 2518 2519 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2520 /// pseudo-functions. 2521 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2522 SourceLocation KWLoc, 2523 ParsedType Ty, 2524 SourceLocation RParen); 2525 2526 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2527 SourceLocation KWLoc, 2528 TypeSourceInfo *T, 2529 SourceLocation RParen); 2530 2531 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2532 /// pseudo-functions. 2533 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2534 SourceLocation KWLoc, 2535 ParsedType LhsTy, 2536 ParsedType RhsTy, 2537 SourceLocation RParen); 2538 2539 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2540 SourceLocation KWLoc, 2541 TypeSourceInfo *LhsT, 2542 TypeSourceInfo *RhsT, 2543 SourceLocation RParen); 2544 2545 ExprResult ActOnStartCXXMemberReference(Scope *S, 2546 Expr *Base, 2547 SourceLocation OpLoc, 2548 tok::TokenKind OpKind, 2549 ParsedType &ObjectType, 2550 bool &MayBePseudoDestructor); 2551 2552 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2553 2554 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2555 SourceLocation OpLoc, 2556 tok::TokenKind OpKind, 2557 const CXXScopeSpec &SS, 2558 TypeSourceInfo *ScopeType, 2559 SourceLocation CCLoc, 2560 SourceLocation TildeLoc, 2561 PseudoDestructorTypeStorage DestroyedType, 2562 bool HasTrailingLParen); 2563 2564 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2565 SourceLocation OpLoc, 2566 tok::TokenKind OpKind, 2567 CXXScopeSpec &SS, 2568 UnqualifiedId &FirstTypeName, 2569 SourceLocation CCLoc, 2570 SourceLocation TildeLoc, 2571 UnqualifiedId &SecondTypeName, 2572 bool HasTrailingLParen); 2573 2574 /// MaybeCreateExprWithCleanups - If the current full-expression 2575 /// requires any cleanups, surround it with a ExprWithCleanups node. 2576 /// Otherwise, just returns the passed-in expression. 2577 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2578 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2579 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2580 2581 ExprResult ActOnFinishFullExpr(Expr *Expr); 2582 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2583 2584 // Marks SS invalid if it represents an incomplete type. 2585 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2586 2587 DeclContext *computeDeclContext(QualType T); 2588 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2589 bool EnteringContext = false); 2590 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2591 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2592 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2593 2594 /// \brief The parser has parsed a global nested-name-specifier '::'. 2595 /// 2596 /// \param S The scope in which this nested-name-specifier occurs. 2597 /// 2598 /// \param CCLoc The location of the '::'. 2599 /// 2600 /// \param SS The nested-name-specifier, which will be updated in-place 2601 /// to reflect the parsed nested-name-specifier. 2602 /// 2603 /// \returns true if an error occurred, false otherwise. 2604 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2605 CXXScopeSpec &SS); 2606 2607 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2608 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2609 2610 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2611 SourceLocation IdLoc, 2612 IdentifierInfo &II, 2613 ParsedType ObjectType); 2614 2615 bool BuildCXXNestedNameSpecifier(Scope *S, 2616 IdentifierInfo &Identifier, 2617 SourceLocation IdentifierLoc, 2618 SourceLocation CCLoc, 2619 QualType ObjectType, 2620 bool EnteringContext, 2621 CXXScopeSpec &SS, 2622 NamedDecl *ScopeLookupResult, 2623 bool ErrorRecoveryLookup); 2624 2625 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2626 /// 2627 /// \param S The scope in which this nested-name-specifier occurs. 2628 /// 2629 /// \param Identifier The identifier preceding the '::'. 2630 /// 2631 /// \param IdentifierLoc The location of the identifier. 2632 /// 2633 /// \param CCLoc The location of the '::'. 2634 /// 2635 /// \param ObjectType The type of the object, if we're parsing 2636 /// nested-name-specifier in a member access expression. 2637 /// 2638 /// \param EnteringContext Whether we're entering the context nominated by 2639 /// this nested-name-specifier. 2640 /// 2641 /// \param SS The nested-name-specifier, which is both an input 2642 /// parameter (the nested-name-specifier before this type) and an 2643 /// output parameter (containing the full nested-name-specifier, 2644 /// including this new type). 2645 /// 2646 /// \returns true if an error occurred, false otherwise. 2647 bool ActOnCXXNestedNameSpecifier(Scope *S, 2648 IdentifierInfo &Identifier, 2649 SourceLocation IdentifierLoc, 2650 SourceLocation CCLoc, 2651 ParsedType ObjectType, 2652 bool EnteringContext, 2653 CXXScopeSpec &SS); 2654 2655 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2656 IdentifierInfo &Identifier, 2657 SourceLocation IdentifierLoc, 2658 SourceLocation ColonLoc, 2659 ParsedType ObjectType, 2660 bool EnteringContext); 2661 2662 /// \brief The parser has parsed a nested-name-specifier 2663 /// 'template[opt] template-name < template-args >::'. 2664 /// 2665 /// \param S The scope in which this nested-name-specifier occurs. 2666 /// 2667 /// \param TemplateLoc The location of the 'template' keyword, if any. 2668 /// 2669 /// \param SS The nested-name-specifier, which is both an input 2670 /// parameter (the nested-name-specifier before this type) and an 2671 /// output parameter (containing the full nested-name-specifier, 2672 /// including this new type). 2673 /// 2674 /// \param TemplateLoc the location of the 'template' keyword, if any. 2675 /// \param TemplateName The template name. 2676 /// \param TemplateNameLoc The location of the template name. 2677 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2678 /// \param TemplateArgs The template arguments. 2679 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2680 /// \param CCLoc The location of the '::'. 2681 2682 /// \param EnteringContext Whether we're entering the context of the 2683 /// nested-name-specifier. 2684 /// 2685 /// 2686 /// \returns true if an error occurred, false otherwise. 2687 bool ActOnCXXNestedNameSpecifier(Scope *S, 2688 SourceLocation TemplateLoc, 2689 CXXScopeSpec &SS, 2690 TemplateTy Template, 2691 SourceLocation TemplateNameLoc, 2692 SourceLocation LAngleLoc, 2693 ASTTemplateArgsPtr TemplateArgs, 2694 SourceLocation RAngleLoc, 2695 SourceLocation CCLoc, 2696 bool EnteringContext); 2697 2698 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2699 /// that the parser can use later to reconstruct the given 2700 /// nested-name-specifier. 2701 /// 2702 /// \param SS A nested-name-specifier. 2703 /// 2704 /// \returns A pointer containing all of the information in the 2705 /// nested-name-specifier \p SS. 2706 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2707 2708 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2709 /// the nested-name-specifier structure. 2710 /// 2711 /// \param Annotation The annotation pointer, produced by 2712 /// \c SaveNestedNameSpecifierAnnotation(). 2713 /// 2714 /// \param AnnotationRange The source range corresponding to the annotation. 2715 /// 2716 /// \param SS The nested-name-specifier that will be updated with the contents 2717 /// of the annotation pointer. 2718 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2719 SourceRange AnnotationRange, 2720 CXXScopeSpec &SS); 2721 2722 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2723 2724 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2725 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2726 /// After this method is called, according to [C++ 3.4.3p3], names should be 2727 /// looked up in the declarator-id's scope, until the declarator is parsed and 2728 /// ActOnCXXExitDeclaratorScope is called. 2729 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2730 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2731 2732 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2733 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2734 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2735 /// Used to indicate that names should revert to being looked up in the 2736 /// defining scope. 2737 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2738 2739 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2740 /// initializer for the declaration 'Dcl'. 2741 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2742 /// static data member of class X, names should be looked up in the scope of 2743 /// class X. 2744 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2745 2746 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2747 /// initializer for the declaration 'Dcl'. 2748 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2749 2750 // ParseObjCStringLiteral - Parse Objective-C string literals. 2751 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2752 Expr **Strings, 2753 unsigned NumStrings); 2754 2755 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2756 TypeSourceInfo *EncodedTypeInfo, 2757 SourceLocation RParenLoc); 2758 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2759 CXXMethodDecl *Method); 2760 2761 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2762 SourceLocation EncodeLoc, 2763 SourceLocation LParenLoc, 2764 ParsedType Ty, 2765 SourceLocation RParenLoc); 2766 2767 // ParseObjCSelectorExpression - Build selector expression for @selector 2768 ExprResult ParseObjCSelectorExpression(Selector Sel, 2769 SourceLocation AtLoc, 2770 SourceLocation SelLoc, 2771 SourceLocation LParenLoc, 2772 SourceLocation RParenLoc); 2773 2774 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2775 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2776 SourceLocation AtLoc, 2777 SourceLocation ProtoLoc, 2778 SourceLocation LParenLoc, 2779 SourceLocation RParenLoc); 2780 2781 //===--------------------------------------------------------------------===// 2782 // C++ Declarations 2783 // 2784 Decl *ActOnStartLinkageSpecification(Scope *S, 2785 SourceLocation ExternLoc, 2786 SourceLocation LangLoc, 2787 llvm::StringRef Lang, 2788 SourceLocation LBraceLoc); 2789 Decl *ActOnFinishLinkageSpecification(Scope *S, 2790 Decl *LinkageSpec, 2791 SourceLocation RBraceLoc); 2792 2793 2794 //===--------------------------------------------------------------------===// 2795 // C++ Classes 2796 // 2797 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2798 const CXXScopeSpec *SS = 0); 2799 2800 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2801 SourceLocation ASLoc, 2802 SourceLocation ColonLoc); 2803 2804 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2805 Declarator &D, 2806 MultiTemplateParamsArg TemplateParameterLists, 2807 Expr *BitfieldWidth, const VirtSpecifiers &VS, 2808 Expr *Init, bool IsDefinition, 2809 bool Deleted = false); 2810 2811 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2812 Scope *S, 2813 CXXScopeSpec &SS, 2814 IdentifierInfo *MemberOrBase, 2815 ParsedType TemplateTypeTy, 2816 SourceLocation IdLoc, 2817 SourceLocation LParenLoc, 2818 Expr **Args, unsigned NumArgs, 2819 SourceLocation RParenLoc, 2820 SourceLocation EllipsisLoc); 2821 2822 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2823 unsigned NumArgs, SourceLocation IdLoc, 2824 SourceLocation LParenLoc, 2825 SourceLocation RParenLoc); 2826 2827 MemInitResult BuildBaseInitializer(QualType BaseType, 2828 TypeSourceInfo *BaseTInfo, 2829 Expr **Args, unsigned NumArgs, 2830 SourceLocation LParenLoc, 2831 SourceLocation RParenLoc, 2832 CXXRecordDecl *ClassDecl, 2833 SourceLocation EllipsisLoc); 2834 2835 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 2836 Expr **Args, unsigned NumArgs, 2837 SourceLocation BaseLoc, 2838 SourceLocation RParenLoc, 2839 SourceLocation LParenLoc, 2840 CXXRecordDecl *ClassDecl); 2841 2842 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 2843 CXXCtorInitializer **Initializers, 2844 unsigned NumInitializers, bool AnyErrors); 2845 2846 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2847 2848 2849 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2850 /// mark all the non-trivial destructors of its members and bases as 2851 /// referenced. 2852 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2853 CXXRecordDecl *Record); 2854 2855 /// \brief The list of classes whose vtables have been used within 2856 /// this translation unit, and the source locations at which the 2857 /// first use occurred. 2858 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2859 2860 /// \brief The list of vtables that are required but have not yet been 2861 /// materialized. 2862 llvm::SmallVector<VTableUse, 16> VTableUses; 2863 2864 /// \brief The set of classes whose vtables have been used within 2865 /// this translation unit, and a bit that will be true if the vtable is 2866 /// required to be emitted (otherwise, it should be emitted only if needed 2867 /// by code generation). 2868 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2869 2870 /// \brief A list of all of the dynamic classes in this translation 2871 /// unit. 2872 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2873 2874 /// \brief Note that the vtable for the given class was used at the 2875 /// given location. 2876 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2877 bool DefinitionRequired = false); 2878 2879 /// MarkVirtualMembersReferenced - Will mark all members of the given 2880 /// CXXRecordDecl referenced. 2881 void MarkVirtualMembersReferenced(SourceLocation Loc, 2882 const CXXRecordDecl *RD); 2883 2884 /// \brief Define all of the vtables that have been used in this 2885 /// translation unit and reference any virtual members used by those 2886 /// vtables. 2887 /// 2888 /// \returns true if any work was done, false otherwise. 2889 bool DefineUsedVTables(); 2890 2891 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2892 2893 void ActOnMemInitializers(Decl *ConstructorDecl, 2894 SourceLocation ColonLoc, 2895 MemInitTy **MemInits, unsigned NumMemInits, 2896 bool AnyErrors); 2897 2898 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2899 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2900 Decl *TagDecl, 2901 SourceLocation LBrac, 2902 SourceLocation RBrac, 2903 AttributeList *AttrList); 2904 2905 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2906 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2907 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2908 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2909 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2910 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2911 2912 Decl *ActOnStaticAssertDeclaration(SourceLocation AssertLoc, 2913 Expr *AssertExpr, 2914 Expr *AssertMessageExpr); 2915 2916 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2917 TypeSourceInfo *TSInfo); 2918 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2919 MultiTemplateParamsArg TemplateParams); 2920 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2921 MultiTemplateParamsArg TemplateParams); 2922 2923 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2924 StorageClass& SC); 2925 void CheckConstructor(CXXConstructorDecl *Constructor); 2926 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2927 StorageClass& SC); 2928 bool CheckDestructor(CXXDestructorDecl *Destructor); 2929 void CheckConversionDeclarator(Declarator &D, QualType &R, 2930 StorageClass& SC); 2931 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2932 2933 //===--------------------------------------------------------------------===// 2934 // C++ Derived Classes 2935 // 2936 2937 /// ActOnBaseSpecifier - Parsed a base specifier 2938 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2939 SourceRange SpecifierRange, 2940 bool Virtual, AccessSpecifier Access, 2941 TypeSourceInfo *TInfo, 2942 SourceLocation EllipsisLoc); 2943 2944 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2945 SourceRange SpecifierRange, 2946 bool Virtual, AccessSpecifier Access, 2947 ParsedType basetype, 2948 SourceLocation BaseLoc, 2949 SourceLocation EllipsisLoc); 2950 2951 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2952 unsigned NumBases); 2953 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 2954 2955 bool IsDerivedFrom(QualType Derived, QualType Base); 2956 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 2957 2958 // FIXME: I don't like this name. 2959 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 2960 2961 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 2962 2963 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2964 SourceLocation Loc, SourceRange Range, 2965 CXXCastPath *BasePath = 0, 2966 bool IgnoreAccess = false); 2967 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2968 unsigned InaccessibleBaseID, 2969 unsigned AmbigiousBaseConvID, 2970 SourceLocation Loc, SourceRange Range, 2971 DeclarationName Name, 2972 CXXCastPath *BasePath); 2973 2974 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 2975 2976 /// CheckOverridingFunctionReturnType - Checks whether the return types are 2977 /// covariant, according to C++ [class.virtual]p5. 2978 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 2979 const CXXMethodDecl *Old); 2980 2981 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 2982 /// spec is a subset of base spec. 2983 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 2984 const CXXMethodDecl *Old); 2985 2986 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 2987 2988 /// CheckOverrideControl - Check C++0x override control semantics. 2989 void CheckOverrideControl(const Decl *D); 2990 2991 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 2992 /// overrides a virtual member function marked 'final', according to 2993 /// C++0x [class.virtual]p3. 2994 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 2995 const CXXMethodDecl *Old); 2996 2997 2998 //===--------------------------------------------------------------------===// 2999 // C++ Access Control 3000 // 3001 3002 enum AccessResult { 3003 AR_accessible, 3004 AR_inaccessible, 3005 AR_dependent, 3006 AR_delayed 3007 }; 3008 3009 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3010 NamedDecl *PrevMemberDecl, 3011 AccessSpecifier LexicalAS); 3012 3013 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3014 DeclAccessPair FoundDecl); 3015 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3016 DeclAccessPair FoundDecl); 3017 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3018 SourceRange PlacementRange, 3019 CXXRecordDecl *NamingClass, 3020 DeclAccessPair FoundDecl); 3021 AccessResult CheckConstructorAccess(SourceLocation Loc, 3022 CXXConstructorDecl *D, 3023 const InitializedEntity &Entity, 3024 AccessSpecifier Access, 3025 bool IsCopyBindingRefToTemp = false); 3026 AccessResult CheckDestructorAccess(SourceLocation Loc, 3027 CXXDestructorDecl *Dtor, 3028 const PartialDiagnostic &PDiag); 3029 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3030 NamedDecl *D, 3031 const PartialDiagnostic &PDiag); 3032 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3033 Expr *ObjectExpr, 3034 Expr *ArgExpr, 3035 DeclAccessPair FoundDecl); 3036 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3037 DeclAccessPair FoundDecl); 3038 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3039 QualType Base, QualType Derived, 3040 const CXXBasePath &Path, 3041 unsigned DiagID, 3042 bool ForceCheck = false, 3043 bool ForceUnprivileged = false); 3044 void CheckLookupAccess(const LookupResult &R); 3045 3046 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3047 const MultiLevelTemplateArgumentList &TemplateArgs); 3048 void PerformDependentDiagnostics(const DeclContext *Pattern, 3049 const MultiLevelTemplateArgumentList &TemplateArgs); 3050 3051 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3052 3053 /// A flag to suppress access checking. 3054 bool SuppressAccessChecking; 3055 3056 /// \brief When true, access checking violations are treated as SFINAE 3057 /// failures rather than hard errors. 3058 bool AccessCheckingSFINAE; 3059 3060 void ActOnStartSuppressingAccessChecks(); 3061 void ActOnStopSuppressingAccessChecks(); 3062 3063 enum AbstractDiagSelID { 3064 AbstractNone = -1, 3065 AbstractReturnType, 3066 AbstractParamType, 3067 AbstractVariableType, 3068 AbstractFieldType, 3069 AbstractArrayType 3070 }; 3071 3072 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3073 const PartialDiagnostic &PD); 3074 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3075 3076 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3077 AbstractDiagSelID SelID = AbstractNone); 3078 3079 //===--------------------------------------------------------------------===// 3080 // C++ Overloaded Operators [C++ 13.5] 3081 // 3082 3083 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3084 3085 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3086 3087 //===--------------------------------------------------------------------===// 3088 // C++ Templates [C++ 14] 3089 // 3090 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3091 QualType ObjectType, bool EnteringContext, 3092 bool &MemberOfUnknownSpecialization); 3093 3094 TemplateNameKind isTemplateName(Scope *S, 3095 CXXScopeSpec &SS, 3096 bool hasTemplateKeyword, 3097 UnqualifiedId &Name, 3098 ParsedType ObjectType, 3099 bool EnteringContext, 3100 TemplateTy &Template, 3101 bool &MemberOfUnknownSpecialization); 3102 3103 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3104 SourceLocation IILoc, 3105 Scope *S, 3106 const CXXScopeSpec *SS, 3107 TemplateTy &SuggestedTemplate, 3108 TemplateNameKind &SuggestedKind); 3109 3110 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3111 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3112 3113 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3114 SourceLocation EllipsisLoc, 3115 SourceLocation KeyLoc, 3116 IdentifierInfo *ParamName, 3117 SourceLocation ParamNameLoc, 3118 unsigned Depth, unsigned Position, 3119 SourceLocation EqualLoc, 3120 ParsedType DefaultArg); 3121 3122 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3123 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3124 unsigned Depth, 3125 unsigned Position, 3126 SourceLocation EqualLoc, 3127 Expr *DefaultArg); 3128 Decl *ActOnTemplateTemplateParameter(Scope *S, 3129 SourceLocation TmpLoc, 3130 TemplateParamsTy *Params, 3131 SourceLocation EllipsisLoc, 3132 IdentifierInfo *ParamName, 3133 SourceLocation ParamNameLoc, 3134 unsigned Depth, 3135 unsigned Position, 3136 SourceLocation EqualLoc, 3137 ParsedTemplateArgument DefaultArg); 3138 3139 TemplateParamsTy * 3140 ActOnTemplateParameterList(unsigned Depth, 3141 SourceLocation ExportLoc, 3142 SourceLocation TemplateLoc, 3143 SourceLocation LAngleLoc, 3144 Decl **Params, unsigned NumParams, 3145 SourceLocation RAngleLoc); 3146 3147 /// \brief The context in which we are checking a template parameter 3148 /// list. 3149 enum TemplateParamListContext { 3150 TPC_ClassTemplate, 3151 TPC_FunctionTemplate, 3152 TPC_ClassTemplateMember, 3153 TPC_FriendFunctionTemplate, 3154 TPC_FriendFunctionTemplateDefinition 3155 }; 3156 3157 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3158 TemplateParameterList *OldParams, 3159 TemplateParamListContext TPC); 3160 TemplateParameterList * 3161 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3162 const CXXScopeSpec &SS, 3163 TemplateParameterList **ParamLists, 3164 unsigned NumParamLists, 3165 bool IsFriend, 3166 bool &IsExplicitSpecialization, 3167 bool &Invalid); 3168 3169 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3170 SourceLocation KWLoc, CXXScopeSpec &SS, 3171 IdentifierInfo *Name, SourceLocation NameLoc, 3172 AttributeList *Attr, 3173 TemplateParameterList *TemplateParams, 3174 AccessSpecifier AS); 3175 3176 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3177 TemplateArgumentListInfo &Out); 3178 3179 QualType CheckTemplateIdType(TemplateName Template, 3180 SourceLocation TemplateLoc, 3181 const TemplateArgumentListInfo &TemplateArgs); 3182 3183 TypeResult 3184 ActOnTemplateIdType(TemplateTy Template, SourceLocation TemplateLoc, 3185 SourceLocation LAngleLoc, 3186 ASTTemplateArgsPtr TemplateArgs, 3187 SourceLocation RAngleLoc); 3188 3189 TypeResult ActOnTagTemplateIdType(CXXScopeSpec &SS, 3190 TypeResult Type, 3191 TagUseKind TUK, 3192 TypeSpecifierType TagSpec, 3193 SourceLocation TagLoc); 3194 3195 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3196 LookupResult &R, 3197 bool RequiresADL, 3198 const TemplateArgumentListInfo &TemplateArgs); 3199 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3200 const DeclarationNameInfo &NameInfo, 3201 const TemplateArgumentListInfo &TemplateArgs); 3202 3203 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3204 SourceLocation TemplateKWLoc, 3205 CXXScopeSpec &SS, 3206 UnqualifiedId &Name, 3207 ParsedType ObjectType, 3208 bool EnteringContext, 3209 TemplateTy &Template); 3210 3211 DeclResult 3212 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3213 SourceLocation KWLoc, 3214 CXXScopeSpec &SS, 3215 TemplateTy Template, 3216 SourceLocation TemplateNameLoc, 3217 SourceLocation LAngleLoc, 3218 ASTTemplateArgsPtr TemplateArgs, 3219 SourceLocation RAngleLoc, 3220 AttributeList *Attr, 3221 MultiTemplateParamsArg TemplateParameterLists); 3222 3223 Decl *ActOnTemplateDeclarator(Scope *S, 3224 MultiTemplateParamsArg TemplateParameterLists, 3225 Declarator &D); 3226 3227 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3228 MultiTemplateParamsArg TemplateParameterLists, 3229 Declarator &D); 3230 3231 bool 3232 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3233 TemplateSpecializationKind NewTSK, 3234 NamedDecl *PrevDecl, 3235 TemplateSpecializationKind PrevTSK, 3236 SourceLocation PrevPtOfInstantiation, 3237 bool &SuppressNew); 3238 3239 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3240 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3241 LookupResult &Previous); 3242 3243 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3244 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3245 LookupResult &Previous); 3246 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3247 3248 DeclResult 3249 ActOnExplicitInstantiation(Scope *S, 3250 SourceLocation ExternLoc, 3251 SourceLocation TemplateLoc, 3252 unsigned TagSpec, 3253 SourceLocation KWLoc, 3254 const CXXScopeSpec &SS, 3255 TemplateTy Template, 3256 SourceLocation TemplateNameLoc, 3257 SourceLocation LAngleLoc, 3258 ASTTemplateArgsPtr TemplateArgs, 3259 SourceLocation RAngleLoc, 3260 AttributeList *Attr); 3261 3262 DeclResult 3263 ActOnExplicitInstantiation(Scope *S, 3264 SourceLocation ExternLoc, 3265 SourceLocation TemplateLoc, 3266 unsigned TagSpec, 3267 SourceLocation KWLoc, 3268 CXXScopeSpec &SS, 3269 IdentifierInfo *Name, 3270 SourceLocation NameLoc, 3271 AttributeList *Attr); 3272 3273 DeclResult ActOnExplicitInstantiation(Scope *S, 3274 SourceLocation ExternLoc, 3275 SourceLocation TemplateLoc, 3276 Declarator &D); 3277 3278 TemplateArgumentLoc 3279 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3280 SourceLocation TemplateLoc, 3281 SourceLocation RAngleLoc, 3282 Decl *Param, 3283 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3284 3285 /// \brief Specifies the context in which a particular template 3286 /// argument is being checked. 3287 enum CheckTemplateArgumentKind { 3288 /// \brief The template argument was specified in the code or was 3289 /// instantiated with some deduced template arguments. 3290 CTAK_Specified, 3291 3292 /// \brief The template argument was deduced via template argument 3293 /// deduction. 3294 CTAK_Deduced, 3295 3296 /// \brief The template argument was deduced from an array bound 3297 /// via template argument deduction. 3298 CTAK_DeducedFromArrayBound 3299 }; 3300 3301 bool CheckTemplateArgument(NamedDecl *Param, 3302 const TemplateArgumentLoc &Arg, 3303 NamedDecl *Template, 3304 SourceLocation TemplateLoc, 3305 SourceLocation RAngleLoc, 3306 unsigned ArgumentPackIndex, 3307 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3308 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3309 3310 bool CheckTemplateArgumentList(TemplateDecl *Template, 3311 SourceLocation TemplateLoc, 3312 const TemplateArgumentListInfo &TemplateArgs, 3313 bool PartialTemplateArgs, 3314 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3315 3316 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3317 const TemplateArgumentLoc &Arg, 3318 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3319 3320 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3321 TypeSourceInfo *Arg); 3322 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3323 TemplateArgument &Converted); 3324 bool CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3325 QualType InstantiatedParamType, Expr *&Arg, 3326 TemplateArgument &Converted, 3327 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3328 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3329 const TemplateArgumentLoc &Arg); 3330 3331 ExprResult 3332 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3333 QualType ParamType, 3334 SourceLocation Loc); 3335 ExprResult 3336 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3337 SourceLocation Loc); 3338 3339 /// \brief Enumeration describing how template parameter lists are compared 3340 /// for equality. 3341 enum TemplateParameterListEqualKind { 3342 /// \brief We are matching the template parameter lists of two templates 3343 /// that might be redeclarations. 3344 /// 3345 /// \code 3346 /// template<typename T> struct X; 3347 /// template<typename T> struct X; 3348 /// \endcode 3349 TPL_TemplateMatch, 3350 3351 /// \brief We are matching the template parameter lists of two template 3352 /// template parameters as part of matching the template parameter lists 3353 /// of two templates that might be redeclarations. 3354 /// 3355 /// \code 3356 /// template<template<int I> class TT> struct X; 3357 /// template<template<int Value> class Other> struct X; 3358 /// \endcode 3359 TPL_TemplateTemplateParmMatch, 3360 3361 /// \brief We are matching the template parameter lists of a template 3362 /// template argument against the template parameter lists of a template 3363 /// template parameter. 3364 /// 3365 /// \code 3366 /// template<template<int Value> class Metafun> struct X; 3367 /// template<int Value> struct integer_c; 3368 /// X<integer_c> xic; 3369 /// \endcode 3370 TPL_TemplateTemplateArgumentMatch 3371 }; 3372 3373 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3374 TemplateParameterList *Old, 3375 bool Complain, 3376 TemplateParameterListEqualKind Kind, 3377 SourceLocation TemplateArgLoc 3378 = SourceLocation()); 3379 3380 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3381 3382 /// \brief Called when the parser has parsed a C++ typename 3383 /// specifier, e.g., "typename T::type". 3384 /// 3385 /// \param S The scope in which this typename type occurs. 3386 /// \param TypenameLoc the location of the 'typename' keyword 3387 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3388 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3389 /// \param IdLoc the location of the identifier. 3390 TypeResult 3391 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3392 const CXXScopeSpec &SS, const IdentifierInfo &II, 3393 SourceLocation IdLoc); 3394 3395 /// \brief Called when the parser has parsed a C++ typename 3396 /// specifier that ends in a template-id, e.g., 3397 /// "typename MetaFun::template apply<T1, T2>". 3398 /// 3399 /// \param S The scope in which this typename type occurs. 3400 /// \param TypenameLoc the location of the 'typename' keyword 3401 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3402 /// \param TemplateLoc the location of the 'template' keyword, if any. 3403 /// \param TemplateName The template name. 3404 /// \param TemplateNameLoc The location of the template name. 3405 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3406 /// \param TemplateArgs The template arguments. 3407 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3408 TypeResult 3409 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3410 const CXXScopeSpec &SS, 3411 SourceLocation TemplateLoc, 3412 TemplateTy Template, 3413 SourceLocation TemplateNameLoc, 3414 SourceLocation LAngleLoc, 3415 ASTTemplateArgsPtr TemplateArgs, 3416 SourceLocation RAngleLoc); 3417 3418 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3419 SourceLocation KeywordLoc, 3420 NestedNameSpecifierLoc QualifierLoc, 3421 const IdentifierInfo &II, 3422 SourceLocation IILoc); 3423 3424 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3425 SourceLocation Loc, 3426 DeclarationName Name); 3427 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3428 3429 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3430 3431 std::string 3432 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3433 const TemplateArgumentList &Args); 3434 3435 std::string 3436 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3437 const TemplateArgument *Args, 3438 unsigned NumArgs); 3439 3440 //===--------------------------------------------------------------------===// 3441 // C++ Variadic Templates (C++0x [temp.variadic]) 3442 //===--------------------------------------------------------------------===// 3443 3444 /// \brief The context in which an unexpanded parameter pack is 3445 /// being diagnosed. 3446 /// 3447 /// Note that the values of this enumeration line up with the first 3448 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3449 enum UnexpandedParameterPackContext { 3450 /// \brief An arbitrary expression. 3451 UPPC_Expression = 0, 3452 3453 /// \brief The base type of a class type. 3454 UPPC_BaseType, 3455 3456 /// \brief The type of an arbitrary declaration. 3457 UPPC_DeclarationType, 3458 3459 /// \brief The type of a data member. 3460 UPPC_DataMemberType, 3461 3462 /// \brief The size of a bit-field. 3463 UPPC_BitFieldWidth, 3464 3465 /// \brief The expression in a static assertion. 3466 UPPC_StaticAssertExpression, 3467 3468 /// \brief The fixed underlying type of an enumeration. 3469 UPPC_FixedUnderlyingType, 3470 3471 /// \brief The enumerator value. 3472 UPPC_EnumeratorValue, 3473 3474 /// \brief A using declaration. 3475 UPPC_UsingDeclaration, 3476 3477 /// \brief A friend declaration. 3478 UPPC_FriendDeclaration, 3479 3480 /// \brief A declaration qualifier. 3481 UPPC_DeclarationQualifier, 3482 3483 /// \brief An initializer. 3484 UPPC_Initializer, 3485 3486 /// \brief A default argument. 3487 UPPC_DefaultArgument, 3488 3489 /// \brief The type of a non-type template parameter. 3490 UPPC_NonTypeTemplateParameterType, 3491 3492 /// \brief The type of an exception. 3493 UPPC_ExceptionType, 3494 3495 /// \brief Partial specialization. 3496 UPPC_PartialSpecialization 3497 }; 3498 3499 /// \brief If the given type contains an unexpanded parameter pack, 3500 /// diagnose the error. 3501 /// 3502 /// \param Loc The source location where a diagnostc should be emitted. 3503 /// 3504 /// \param T The type that is being checked for unexpanded parameter 3505 /// packs. 3506 /// 3507 /// \returns true if an error ocurred, false otherwise. 3508 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3509 UnexpandedParameterPackContext UPPC); 3510 3511 /// \brief If the given expression contains an unexpanded parameter 3512 /// pack, diagnose the error. 3513 /// 3514 /// \param E The expression that is being checked for unexpanded 3515 /// parameter packs. 3516 /// 3517 /// \returns true if an error ocurred, false otherwise. 3518 bool DiagnoseUnexpandedParameterPack(Expr *E, 3519 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3520 3521 /// \brief If the given nested-name-specifier contains an unexpanded 3522 /// parameter pack, diagnose the error. 3523 /// 3524 /// \param SS The nested-name-specifier that is being checked for 3525 /// unexpanded parameter packs. 3526 /// 3527 /// \returns true if an error ocurred, false otherwise. 3528 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3529 UnexpandedParameterPackContext UPPC); 3530 3531 /// \brief If the given name contains an unexpanded parameter pack, 3532 /// diagnose the error. 3533 /// 3534 /// \param NameInfo The name (with source location information) that 3535 /// is being checked for unexpanded parameter packs. 3536 /// 3537 /// \returns true if an error ocurred, false otherwise. 3538 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3539 UnexpandedParameterPackContext UPPC); 3540 3541 /// \brief If the given template name contains an unexpanded parameter pack, 3542 /// diagnose the error. 3543 /// 3544 /// \param Loc The location of the template name. 3545 /// 3546 /// \param Template The template name that is being checked for unexpanded 3547 /// parameter packs. 3548 /// 3549 /// \returns true if an error ocurred, false otherwise. 3550 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3551 TemplateName Template, 3552 UnexpandedParameterPackContext UPPC); 3553 3554 /// \brief If the given template argument contains an unexpanded parameter 3555 /// pack, diagnose the error. 3556 /// 3557 /// \param Arg The template argument that is being checked for unexpanded 3558 /// parameter packs. 3559 /// 3560 /// \returns true if an error ocurred, false otherwise. 3561 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3562 UnexpandedParameterPackContext UPPC); 3563 3564 /// \brief Collect the set of unexpanded parameter packs within the given 3565 /// template argument. 3566 /// 3567 /// \param Arg The template argument that will be traversed to find 3568 /// unexpanded parameter packs. 3569 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3570 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3571 3572 /// \brief Collect the set of unexpanded parameter packs within the given 3573 /// template argument. 3574 /// 3575 /// \param Arg The template argument that will be traversed to find 3576 /// unexpanded parameter packs. 3577 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3578 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3579 3580 /// \brief Collect the set of unexpanded parameter packs within the given 3581 /// type. 3582 /// 3583 /// \param T The type that will be traversed to find 3584 /// unexpanded parameter packs. 3585 void collectUnexpandedParameterPacks(QualType T, 3586 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3587 3588 /// \brief Collect the set of unexpanded parameter packs within the given 3589 /// type. 3590 /// 3591 /// \param TL The type that will be traversed to find 3592 /// unexpanded parameter packs. 3593 void collectUnexpandedParameterPacks(TypeLoc TL, 3594 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3595 3596 /// \brief Invoked when parsing a template argument followed by an 3597 /// ellipsis, which creates a pack expansion. 3598 /// 3599 /// \param Arg The template argument preceding the ellipsis, which 3600 /// may already be invalid. 3601 /// 3602 /// \param EllipsisLoc The location of the ellipsis. 3603 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3604 SourceLocation EllipsisLoc); 3605 3606 /// \brief Invoked when parsing a type followed by an ellipsis, which 3607 /// creates a pack expansion. 3608 /// 3609 /// \param Type The type preceding the ellipsis, which will become 3610 /// the pattern of the pack expansion. 3611 /// 3612 /// \param EllipsisLoc The location of the ellipsis. 3613 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3614 3615 /// \brief Construct a pack expansion type from the pattern of the pack 3616 /// expansion. 3617 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3618 SourceLocation EllipsisLoc, 3619 llvm::Optional<unsigned> NumExpansions); 3620 3621 /// \brief Construct a pack expansion type from the pattern of the pack 3622 /// expansion. 3623 QualType CheckPackExpansion(QualType Pattern, 3624 SourceRange PatternRange, 3625 SourceLocation EllipsisLoc, 3626 llvm::Optional<unsigned> NumExpansions); 3627 3628 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3629 /// creates a pack expansion. 3630 /// 3631 /// \param Pattern The expression preceding the ellipsis, which will become 3632 /// the pattern of the pack expansion. 3633 /// 3634 /// \param EllipsisLoc The location of the ellipsis. 3635 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3636 3637 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3638 /// creates a pack expansion. 3639 /// 3640 /// \param Pattern The expression preceding the ellipsis, which will become 3641 /// the pattern of the pack expansion. 3642 /// 3643 /// \param EllipsisLoc The location of the ellipsis. 3644 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3645 llvm::Optional<unsigned> NumExpansions); 3646 3647 /// \brief Determine whether we could expand a pack expansion with the 3648 /// given set of parameter packs into separate arguments by repeatedly 3649 /// transforming the pattern. 3650 /// 3651 /// \param EllipsisLoc The location of the ellipsis that identifies the 3652 /// pack expansion. 3653 /// 3654 /// \param PatternRange The source range that covers the entire pattern of 3655 /// the pack expansion. 3656 /// 3657 /// \param Unexpanded The set of unexpanded parameter packs within the 3658 /// pattern. 3659 /// 3660 /// \param NumUnexpanded The number of unexpanded parameter packs in 3661 /// \p Unexpanded. 3662 /// 3663 /// \param ShouldExpand Will be set to \c true if the transformer should 3664 /// expand the corresponding pack expansions into separate arguments. When 3665 /// set, \c NumExpansions must also be set. 3666 /// 3667 /// \param RetainExpansion Whether the caller should add an unexpanded 3668 /// pack expansion after all of the expanded arguments. This is used 3669 /// when extending explicitly-specified template argument packs per 3670 /// C++0x [temp.arg.explicit]p9. 3671 /// 3672 /// \param NumExpansions The number of separate arguments that will be in 3673 /// the expanded form of the corresponding pack expansion. This is both an 3674 /// input and an output parameter, which can be set by the caller if the 3675 /// number of expansions is known a priori (e.g., due to a prior substitution) 3676 /// and will be set by the callee when the number of expansions is known. 3677 /// The callee must set this value when \c ShouldExpand is \c true; it may 3678 /// set this value in other cases. 3679 /// 3680 /// \returns true if an error occurred (e.g., because the parameter packs 3681 /// are to be instantiated with arguments of different lengths), false 3682 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3683 /// must be set. 3684 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3685 SourceRange PatternRange, 3686 const UnexpandedParameterPack *Unexpanded, 3687 unsigned NumUnexpanded, 3688 const MultiLevelTemplateArgumentList &TemplateArgs, 3689 bool &ShouldExpand, 3690 bool &RetainExpansion, 3691 llvm::Optional<unsigned> &NumExpansions); 3692 3693 /// \brief Determine the number of arguments in the given pack expansion 3694 /// type. 3695 /// 3696 /// This routine already assumes that the pack expansion type can be 3697 /// expanded and that the number of arguments in the expansion is 3698 /// consistent across all of the unexpanded parameter packs in its pattern. 3699 unsigned getNumArgumentsInExpansion(QualType T, 3700 const MultiLevelTemplateArgumentList &TemplateArgs); 3701 3702 /// \brief Determine whether the given declarator contains any unexpanded 3703 /// parameter packs. 3704 /// 3705 /// This routine is used by the parser to disambiguate function declarators 3706 /// with an ellipsis prior to the ')', e.g., 3707 /// 3708 /// \code 3709 /// void f(T...); 3710 /// \endcode 3711 /// 3712 /// To determine whether we have an (unnamed) function parameter pack or 3713 /// a variadic function. 3714 /// 3715 /// \returns true if the declarator contains any unexpanded parameter packs, 3716 /// false otherwise. 3717 bool containsUnexpandedParameterPacks(Declarator &D); 3718 3719 //===--------------------------------------------------------------------===// 3720 // C++ Template Argument Deduction (C++ [temp.deduct]) 3721 //===--------------------------------------------------------------------===// 3722 3723 /// \brief Describes the result of template argument deduction. 3724 /// 3725 /// The TemplateDeductionResult enumeration describes the result of 3726 /// template argument deduction, as returned from 3727 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3728 /// structure provides additional information about the results of 3729 /// template argument deduction, e.g., the deduced template argument 3730 /// list (if successful) or the specific template parameters or 3731 /// deduced arguments that were involved in the failure. 3732 enum TemplateDeductionResult { 3733 /// \brief Template argument deduction was successful. 3734 TDK_Success = 0, 3735 /// \brief Template argument deduction exceeded the maximum template 3736 /// instantiation depth (which has already been diagnosed). 3737 TDK_InstantiationDepth, 3738 /// \brief Template argument deduction did not deduce a value 3739 /// for every template parameter. 3740 TDK_Incomplete, 3741 /// \brief Template argument deduction produced inconsistent 3742 /// deduced values for the given template parameter. 3743 TDK_Inconsistent, 3744 /// \brief Template argument deduction failed due to inconsistent 3745 /// cv-qualifiers on a template parameter type that would 3746 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3747 /// but were given a non-const "X". 3748 TDK_Underqualified, 3749 /// \brief Substitution of the deduced template argument values 3750 /// resulted in an error. 3751 TDK_SubstitutionFailure, 3752 /// \brief Substitution of the deduced template argument values 3753 /// into a non-deduced context produced a type or value that 3754 /// produces a type that does not match the original template 3755 /// arguments provided. 3756 TDK_NonDeducedMismatch, 3757 /// \brief When performing template argument deduction for a function 3758 /// template, there were too many call arguments. 3759 TDK_TooManyArguments, 3760 /// \brief When performing template argument deduction for a function 3761 /// template, there were too few call arguments. 3762 TDK_TooFewArguments, 3763 /// \brief The explicitly-specified template arguments were not valid 3764 /// template arguments for the given template. 3765 TDK_InvalidExplicitArguments, 3766 /// \brief The arguments included an overloaded function name that could 3767 /// not be resolved to a suitable function. 3768 TDK_FailedOverloadResolution 3769 }; 3770 3771 TemplateDeductionResult 3772 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3773 const TemplateArgumentList &TemplateArgs, 3774 sema::TemplateDeductionInfo &Info); 3775 3776 TemplateDeductionResult 3777 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3778 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3779 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3780 llvm::SmallVectorImpl<QualType> &ParamTypes, 3781 QualType *FunctionType, 3782 sema::TemplateDeductionInfo &Info); 3783 3784 TemplateDeductionResult 3785 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3786 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3787 unsigned NumExplicitlySpecified, 3788 FunctionDecl *&Specialization, 3789 sema::TemplateDeductionInfo &Info); 3790 3791 TemplateDeductionResult 3792 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3793 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3794 Expr **Args, unsigned NumArgs, 3795 FunctionDecl *&Specialization, 3796 sema::TemplateDeductionInfo &Info); 3797 3798 TemplateDeductionResult 3799 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3800 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3801 QualType ArgFunctionType, 3802 FunctionDecl *&Specialization, 3803 sema::TemplateDeductionInfo &Info); 3804 3805 TemplateDeductionResult 3806 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3807 QualType ToType, 3808 CXXConversionDecl *&Specialization, 3809 sema::TemplateDeductionInfo &Info); 3810 3811 TemplateDeductionResult 3812 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3813 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3814 FunctionDecl *&Specialization, 3815 sema::TemplateDeductionInfo &Info); 3816 3817 bool DeduceAutoType(QualType AutoType, Expr *Initializer, QualType &Result); 3818 3819 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3820 FunctionTemplateDecl *FT2, 3821 SourceLocation Loc, 3822 TemplatePartialOrderingContext TPOC, 3823 unsigned NumCallArguments); 3824 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3825 UnresolvedSetIterator SEnd, 3826 TemplatePartialOrderingContext TPOC, 3827 unsigned NumCallArguments, 3828 SourceLocation Loc, 3829 const PartialDiagnostic &NoneDiag, 3830 const PartialDiagnostic &AmbigDiag, 3831 const PartialDiagnostic &CandidateDiag, 3832 bool Complain = true); 3833 3834 ClassTemplatePartialSpecializationDecl * 3835 getMoreSpecializedPartialSpecialization( 3836 ClassTemplatePartialSpecializationDecl *PS1, 3837 ClassTemplatePartialSpecializationDecl *PS2, 3838 SourceLocation Loc); 3839 3840 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3841 bool OnlyDeduced, 3842 unsigned Depth, 3843 llvm::SmallVectorImpl<bool> &Used); 3844 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3845 llvm::SmallVectorImpl<bool> &Deduced); 3846 3847 //===--------------------------------------------------------------------===// 3848 // C++ Template Instantiation 3849 // 3850 3851 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3852 const TemplateArgumentList *Innermost = 0, 3853 bool RelativeToPrimary = false, 3854 const FunctionDecl *Pattern = 0); 3855 3856 /// \brief A template instantiation that is currently in progress. 3857 struct ActiveTemplateInstantiation { 3858 /// \brief The kind of template instantiation we are performing 3859 enum InstantiationKind { 3860 /// We are instantiating a template declaration. The entity is 3861 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3862 TemplateInstantiation, 3863 3864 /// We are instantiating a default argument for a template 3865 /// parameter. The Entity is the template, and 3866 /// TemplateArgs/NumTemplateArguments provides the template 3867 /// arguments as specified. 3868 /// FIXME: Use a TemplateArgumentList 3869 DefaultTemplateArgumentInstantiation, 3870 3871 /// We are instantiating a default argument for a function. 3872 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3873 /// provides the template arguments as specified. 3874 DefaultFunctionArgumentInstantiation, 3875 3876 /// We are substituting explicit template arguments provided for 3877 /// a function template. The entity is a FunctionTemplateDecl. 3878 ExplicitTemplateArgumentSubstitution, 3879 3880 /// We are substituting template argument determined as part of 3881 /// template argument deduction for either a class template 3882 /// partial specialization or a function template. The 3883 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3884 /// a FunctionTemplateDecl. 3885 DeducedTemplateArgumentSubstitution, 3886 3887 /// We are substituting prior template arguments into a new 3888 /// template parameter. The template parameter itself is either a 3889 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3890 PriorTemplateArgumentSubstitution, 3891 3892 /// We are checking the validity of a default template argument that 3893 /// has been used when naming a template-id. 3894 DefaultTemplateArgumentChecking 3895 } Kind; 3896 3897 /// \brief The point of instantiation within the source code. 3898 SourceLocation PointOfInstantiation; 3899 3900 /// \brief The template (or partial specialization) in which we are 3901 /// performing the instantiation, for substitutions of prior template 3902 /// arguments. 3903 NamedDecl *Template; 3904 3905 /// \brief The entity that is being instantiated. 3906 uintptr_t Entity; 3907 3908 /// \brief The list of template arguments we are substituting, if they 3909 /// are not part of the entity. 3910 const TemplateArgument *TemplateArgs; 3911 3912 /// \brief The number of template arguments in TemplateArgs. 3913 unsigned NumTemplateArgs; 3914 3915 /// \brief The template deduction info object associated with the 3916 /// substitution or checking of explicit or deduced template arguments. 3917 sema::TemplateDeductionInfo *DeductionInfo; 3918 3919 /// \brief The source range that covers the construct that cause 3920 /// the instantiation, e.g., the template-id that causes a class 3921 /// template instantiation. 3922 SourceRange InstantiationRange; 3923 3924 ActiveTemplateInstantiation() 3925 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 3926 NumTemplateArgs(0), DeductionInfo(0) {} 3927 3928 /// \brief Determines whether this template is an actual instantiation 3929 /// that should be counted toward the maximum instantiation depth. 3930 bool isInstantiationRecord() const; 3931 3932 friend bool operator==(const ActiveTemplateInstantiation &X, 3933 const ActiveTemplateInstantiation &Y) { 3934 if (X.Kind != Y.Kind) 3935 return false; 3936 3937 if (X.Entity != Y.Entity) 3938 return false; 3939 3940 switch (X.Kind) { 3941 case TemplateInstantiation: 3942 return true; 3943 3944 case PriorTemplateArgumentSubstitution: 3945 case DefaultTemplateArgumentChecking: 3946 if (X.Template != Y.Template) 3947 return false; 3948 3949 // Fall through 3950 3951 case DefaultTemplateArgumentInstantiation: 3952 case ExplicitTemplateArgumentSubstitution: 3953 case DeducedTemplateArgumentSubstitution: 3954 case DefaultFunctionArgumentInstantiation: 3955 return X.TemplateArgs == Y.TemplateArgs; 3956 3957 } 3958 3959 return true; 3960 } 3961 3962 friend bool operator!=(const ActiveTemplateInstantiation &X, 3963 const ActiveTemplateInstantiation &Y) { 3964 return !(X == Y); 3965 } 3966 }; 3967 3968 /// \brief List of active template instantiations. 3969 /// 3970 /// This vector is treated as a stack. As one template instantiation 3971 /// requires another template instantiation, additional 3972 /// instantiations are pushed onto the stack up to a 3973 /// user-configurable limit LangOptions::InstantiationDepth. 3974 llvm::SmallVector<ActiveTemplateInstantiation, 16> 3975 ActiveTemplateInstantiations; 3976 3977 /// \brief Whether we are in a SFINAE context that is not associated with 3978 /// template instantiation. 3979 /// 3980 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 3981 /// of a template instantiation or template argument deduction. 3982 bool InNonInstantiationSFINAEContext; 3983 3984 /// \brief The number of ActiveTemplateInstantiation entries in 3985 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 3986 /// therefore, should not be counted as part of the instantiation depth. 3987 unsigned NonInstantiationEntries; 3988 3989 /// \brief The last template from which a template instantiation 3990 /// error or warning was produced. 3991 /// 3992 /// This value is used to suppress printing of redundant template 3993 /// instantiation backtraces when there are multiple errors in the 3994 /// same instantiation. FIXME: Does this belong in Sema? It's tough 3995 /// to implement it anywhere else. 3996 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 3997 3998 /// \brief The current index into pack expansion arguments that will be 3999 /// used for substitution of parameter packs. 4000 /// 4001 /// The pack expansion index will be -1 to indicate that parameter packs 4002 /// should be instantiated as themselves. Otherwise, the index specifies 4003 /// which argument within the parameter pack will be used for substitution. 4004 int ArgumentPackSubstitutionIndex; 4005 4006 /// \brief RAII object used to change the argument pack substitution index 4007 /// within a \c Sema object. 4008 /// 4009 /// See \c ArgumentPackSubstitutionIndex for more information. 4010 class ArgumentPackSubstitutionIndexRAII { 4011 Sema &Self; 4012 int OldSubstitutionIndex; 4013 4014 public: 4015 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4016 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4017 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4018 } 4019 4020 ~ArgumentPackSubstitutionIndexRAII() { 4021 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4022 } 4023 }; 4024 4025 friend class ArgumentPackSubstitutionRAII; 4026 4027 /// \brief The stack of calls expression undergoing template instantiation. 4028 /// 4029 /// The top of this stack is used by a fixit instantiating unresolved 4030 /// function calls to fix the AST to match the textual change it prints. 4031 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4032 4033 /// \brief For each declaration that involved template argument deduction, the 4034 /// set of diagnostics that were suppressed during that template argument 4035 /// deduction. 4036 /// 4037 /// FIXME: Serialize this structure to the AST file. 4038 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4039 SuppressedDiagnostics; 4040 4041 /// \brief A stack object to be created when performing template 4042 /// instantiation. 4043 /// 4044 /// Construction of an object of type \c InstantiatingTemplate 4045 /// pushes the current instantiation onto the stack of active 4046 /// instantiations. If the size of this stack exceeds the maximum 4047 /// number of recursive template instantiations, construction 4048 /// produces an error and evaluates true. 4049 /// 4050 /// Destruction of this object will pop the named instantiation off 4051 /// the stack. 4052 struct InstantiatingTemplate { 4053 /// \brief Note that we are instantiating a class template, 4054 /// function template, or a member thereof. 4055 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4056 Decl *Entity, 4057 SourceRange InstantiationRange = SourceRange()); 4058 4059 /// \brief Note that we are instantiating a default argument in a 4060 /// template-id. 4061 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4062 TemplateDecl *Template, 4063 const TemplateArgument *TemplateArgs, 4064 unsigned NumTemplateArgs, 4065 SourceRange InstantiationRange = SourceRange()); 4066 4067 /// \brief Note that we are instantiating a default argument in a 4068 /// template-id. 4069 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4070 FunctionTemplateDecl *FunctionTemplate, 4071 const TemplateArgument *TemplateArgs, 4072 unsigned NumTemplateArgs, 4073 ActiveTemplateInstantiation::InstantiationKind Kind, 4074 sema::TemplateDeductionInfo &DeductionInfo, 4075 SourceRange InstantiationRange = SourceRange()); 4076 4077 /// \brief Note that we are instantiating as part of template 4078 /// argument deduction for a class template partial 4079 /// specialization. 4080 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4081 ClassTemplatePartialSpecializationDecl *PartialSpec, 4082 const TemplateArgument *TemplateArgs, 4083 unsigned NumTemplateArgs, 4084 sema::TemplateDeductionInfo &DeductionInfo, 4085 SourceRange InstantiationRange = SourceRange()); 4086 4087 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4088 ParmVarDecl *Param, 4089 const TemplateArgument *TemplateArgs, 4090 unsigned NumTemplateArgs, 4091 SourceRange InstantiationRange = SourceRange()); 4092 4093 /// \brief Note that we are substituting prior template arguments into a 4094 /// non-type or template template parameter. 4095 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4096 NamedDecl *Template, 4097 NonTypeTemplateParmDecl *Param, 4098 const TemplateArgument *TemplateArgs, 4099 unsigned NumTemplateArgs, 4100 SourceRange InstantiationRange); 4101 4102 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4103 NamedDecl *Template, 4104 TemplateTemplateParmDecl *Param, 4105 const TemplateArgument *TemplateArgs, 4106 unsigned NumTemplateArgs, 4107 SourceRange InstantiationRange); 4108 4109 /// \brief Note that we are checking the default template argument 4110 /// against the template parameter for a given template-id. 4111 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4112 TemplateDecl *Template, 4113 NamedDecl *Param, 4114 const TemplateArgument *TemplateArgs, 4115 unsigned NumTemplateArgs, 4116 SourceRange InstantiationRange); 4117 4118 4119 /// \brief Note that we have finished instantiating this template. 4120 void Clear(); 4121 4122 ~InstantiatingTemplate() { Clear(); } 4123 4124 /// \brief Determines whether we have exceeded the maximum 4125 /// recursive template instantiations. 4126 operator bool() const { return Invalid; } 4127 4128 private: 4129 Sema &SemaRef; 4130 bool Invalid; 4131 bool SavedInNonInstantiationSFINAEContext; 4132 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4133 SourceRange InstantiationRange); 4134 4135 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4136 4137 InstantiatingTemplate& 4138 operator=(const InstantiatingTemplate&); // not implemented 4139 }; 4140 4141 void PrintInstantiationStack(); 4142 4143 /// \brief Determines whether we are currently in a context where 4144 /// template argument substitution failures are not considered 4145 /// errors. 4146 /// 4147 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4148 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4149 /// template-deduction context object, which can be used to capture 4150 /// diagnostics that will be suppressed. 4151 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4152 4153 /// \brief RAII class used to determine whether SFINAE has 4154 /// trapped any errors that occur during template argument 4155 /// deduction.` 4156 class SFINAETrap { 4157 Sema &SemaRef; 4158 unsigned PrevSFINAEErrors; 4159 bool PrevInNonInstantiationSFINAEContext; 4160 bool PrevAccessCheckingSFINAE; 4161 4162 public: 4163 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4164 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4165 PrevInNonInstantiationSFINAEContext( 4166 SemaRef.InNonInstantiationSFINAEContext), 4167 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4168 { 4169 if (!SemaRef.isSFINAEContext()) 4170 SemaRef.InNonInstantiationSFINAEContext = true; 4171 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4172 } 4173 4174 ~SFINAETrap() { 4175 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4176 SemaRef.InNonInstantiationSFINAEContext 4177 = PrevInNonInstantiationSFINAEContext; 4178 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4179 } 4180 4181 /// \brief Determine whether any SFINAE errors have been trapped. 4182 bool hasErrorOccurred() const { 4183 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4184 } 4185 }; 4186 4187 /// \brief The current instantiation scope used to store local 4188 /// variables. 4189 LocalInstantiationScope *CurrentInstantiationScope; 4190 4191 /// \brief The number of typos corrected by CorrectTypo. 4192 unsigned TyposCorrected; 4193 4194 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4195 UnqualifiedTyposCorrectedMap; 4196 4197 /// \brief A cache containing the results of typo correction for unqualified 4198 /// name lookup. 4199 /// 4200 /// The string is the string that we corrected to (which may be empty, if 4201 /// there was no correction), while the boolean will be true when the 4202 /// string represents a keyword. 4203 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4204 4205 /// \brief Worker object for performing CFG-based warnings. 4206 sema::AnalysisBasedWarnings AnalysisWarnings; 4207 4208 /// \brief An entity for which implicit template instantiation is required. 4209 /// 4210 /// The source location associated with the declaration is the first place in 4211 /// the source code where the declaration was "used". It is not necessarily 4212 /// the point of instantiation (which will be either before or after the 4213 /// namespace-scope declaration that triggered this implicit instantiation), 4214 /// However, it is the location that diagnostics should generally refer to, 4215 /// because users will need to know what code triggered the instantiation. 4216 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4217 4218 /// \brief The queue of implicit template instantiations that are required 4219 /// but have not yet been performed. 4220 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4221 4222 /// \brief The queue of implicit template instantiations that are required 4223 /// and must be performed within the current local scope. 4224 /// 4225 /// This queue is only used for member functions of local classes in 4226 /// templates, which must be instantiated in the same scope as their 4227 /// enclosing function, so that they can reference function-local 4228 /// types, static variables, enumerators, etc. 4229 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4230 4231 void PerformPendingInstantiations(bool LocalOnly = false); 4232 4233 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4234 const MultiLevelTemplateArgumentList &TemplateArgs, 4235 SourceLocation Loc, DeclarationName Entity); 4236 4237 QualType SubstType(QualType T, 4238 const MultiLevelTemplateArgumentList &TemplateArgs, 4239 SourceLocation Loc, DeclarationName Entity); 4240 4241 TypeSourceInfo *SubstType(TypeLoc TL, 4242 const MultiLevelTemplateArgumentList &TemplateArgs, 4243 SourceLocation Loc, DeclarationName Entity); 4244 4245 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4246 const MultiLevelTemplateArgumentList &TemplateArgs, 4247 SourceLocation Loc, 4248 DeclarationName Entity); 4249 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4250 const MultiLevelTemplateArgumentList &TemplateArgs, 4251 llvm::Optional<unsigned> NumExpansions); 4252 bool SubstParmTypes(SourceLocation Loc, 4253 ParmVarDecl **Params, unsigned NumParams, 4254 const MultiLevelTemplateArgumentList &TemplateArgs, 4255 llvm::SmallVectorImpl<QualType> &ParamTypes, 4256 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4257 ExprResult SubstExpr(Expr *E, 4258 const MultiLevelTemplateArgumentList &TemplateArgs); 4259 4260 /// \brief Substitute the given template arguments into a list of 4261 /// expressions, expanding pack expansions if required. 4262 /// 4263 /// \param Exprs The list of expressions to substitute into. 4264 /// 4265 /// \param NumExprs The number of expressions in \p Exprs. 4266 /// 4267 /// \param IsCall Whether this is some form of call, in which case 4268 /// default arguments will be dropped. 4269 /// 4270 /// \param TemplateArgs The set of template arguments to substitute. 4271 /// 4272 /// \param Outputs Will receive all of the substituted arguments. 4273 /// 4274 /// \returns true if an error occurred, false otherwise. 4275 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4276 const MultiLevelTemplateArgumentList &TemplateArgs, 4277 llvm::SmallVectorImpl<Expr *> &Outputs); 4278 4279 StmtResult SubstStmt(Stmt *S, 4280 const MultiLevelTemplateArgumentList &TemplateArgs); 4281 4282 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4283 const MultiLevelTemplateArgumentList &TemplateArgs); 4284 4285 bool 4286 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4287 CXXRecordDecl *Pattern, 4288 const MultiLevelTemplateArgumentList &TemplateArgs); 4289 4290 bool 4291 InstantiateClass(SourceLocation PointOfInstantiation, 4292 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4293 const MultiLevelTemplateArgumentList &TemplateArgs, 4294 TemplateSpecializationKind TSK, 4295 bool Complain = true); 4296 4297 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4298 Decl *Pattern, Decl *Inst); 4299 4300 bool 4301 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4302 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4303 TemplateSpecializationKind TSK, 4304 bool Complain = true); 4305 4306 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4307 CXXRecordDecl *Instantiation, 4308 const MultiLevelTemplateArgumentList &TemplateArgs, 4309 TemplateSpecializationKind TSK); 4310 4311 void InstantiateClassTemplateSpecializationMembers( 4312 SourceLocation PointOfInstantiation, 4313 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4314 TemplateSpecializationKind TSK); 4315 4316 NestedNameSpecifier * 4317 SubstNestedNameSpecifier(NestedNameSpecifier *NNS, 4318 SourceRange Range, 4319 const MultiLevelTemplateArgumentList &TemplateArgs); 4320 4321 NestedNameSpecifierLoc 4322 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4323 const MultiLevelTemplateArgumentList &TemplateArgs); 4324 4325 DeclarationNameInfo 4326 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4327 const MultiLevelTemplateArgumentList &TemplateArgs); 4328 TemplateName 4329 SubstTemplateName(TemplateName Name, SourceLocation Loc, 4330 const MultiLevelTemplateArgumentList &TemplateArgs); 4331 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4332 TemplateArgumentListInfo &Result, 4333 const MultiLevelTemplateArgumentList &TemplateArgs); 4334 4335 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4336 FunctionDecl *Function, 4337 bool Recursive = false, 4338 bool DefinitionRequired = false); 4339 void InstantiateStaticDataMemberDefinition( 4340 SourceLocation PointOfInstantiation, 4341 VarDecl *Var, 4342 bool Recursive = false, 4343 bool DefinitionRequired = false); 4344 4345 void InstantiateMemInitializers(CXXConstructorDecl *New, 4346 const CXXConstructorDecl *Tmpl, 4347 const MultiLevelTemplateArgumentList &TemplateArgs); 4348 4349 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4350 const MultiLevelTemplateArgumentList &TemplateArgs); 4351 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4352 const MultiLevelTemplateArgumentList &TemplateArgs); 4353 4354 // Objective-C declarations. 4355 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4356 IdentifierInfo *ClassName, 4357 SourceLocation ClassLoc, 4358 IdentifierInfo *SuperName, 4359 SourceLocation SuperLoc, 4360 Decl * const *ProtoRefs, 4361 unsigned NumProtoRefs, 4362 const SourceLocation *ProtoLocs, 4363 SourceLocation EndProtoLoc, 4364 AttributeList *AttrList); 4365 4366 Decl *ActOnCompatiblityAlias( 4367 SourceLocation AtCompatibilityAliasLoc, 4368 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4369 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4370 4371 void CheckForwardProtocolDeclarationForCircularDependency( 4372 IdentifierInfo *PName, 4373 SourceLocation &PLoc, SourceLocation PrevLoc, 4374 const ObjCList<ObjCProtocolDecl> &PList); 4375 4376 Decl *ActOnStartProtocolInterface( 4377 SourceLocation AtProtoInterfaceLoc, 4378 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4379 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4380 const SourceLocation *ProtoLocs, 4381 SourceLocation EndProtoLoc, 4382 AttributeList *AttrList); 4383 4384 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4385 IdentifierInfo *ClassName, 4386 SourceLocation ClassLoc, 4387 IdentifierInfo *CategoryName, 4388 SourceLocation CategoryLoc, 4389 Decl * const *ProtoRefs, 4390 unsigned NumProtoRefs, 4391 const SourceLocation *ProtoLocs, 4392 SourceLocation EndProtoLoc); 4393 4394 Decl *ActOnStartClassImplementation( 4395 SourceLocation AtClassImplLoc, 4396 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4397 IdentifierInfo *SuperClassname, 4398 SourceLocation SuperClassLoc); 4399 4400 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4401 IdentifierInfo *ClassName, 4402 SourceLocation ClassLoc, 4403 IdentifierInfo *CatName, 4404 SourceLocation CatLoc); 4405 4406 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4407 IdentifierInfo **IdentList, 4408 SourceLocation *IdentLocs, 4409 unsigned NumElts); 4410 4411 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4412 const IdentifierLocPair *IdentList, 4413 unsigned NumElts, 4414 AttributeList *attrList); 4415 4416 void FindProtocolDeclaration(bool WarnOnDeclarations, 4417 const IdentifierLocPair *ProtocolId, 4418 unsigned NumProtocols, 4419 llvm::SmallVectorImpl<Decl *> &Protocols); 4420 4421 /// Ensure attributes are consistent with type. 4422 /// \param [in, out] Attributes The attributes to check; they will 4423 /// be modified to be consistent with \arg PropertyTy. 4424 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4425 SourceLocation Loc, 4426 unsigned &Attributes); 4427 4428 /// Process the specified property declaration and create decls for the 4429 /// setters and getters as needed. 4430 /// \param property The property declaration being processed 4431 /// \param DC The semantic container for the property 4432 /// \param redeclaredProperty Declaration for property if redeclared 4433 /// in class extension. 4434 /// \param lexicalDC Container for redeclaredProperty. 4435 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4436 ObjCContainerDecl *DC, 4437 ObjCPropertyDecl *redeclaredProperty = 0, 4438 ObjCContainerDecl *lexicalDC = 0); 4439 4440 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4441 ObjCPropertyDecl *SuperProperty, 4442 const IdentifierInfo *Name); 4443 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4444 4445 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4446 ObjCMethodDecl *MethodDecl, 4447 bool IsInstance); 4448 4449 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4450 4451 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4452 ObjCInterfaceDecl *ID); 4453 4454 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4455 ObjCProtocolDecl *PDecl); 4456 4457 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4458 Decl **allMethods = 0, unsigned allNum = 0, 4459 Decl **allProperties = 0, unsigned pNum = 0, 4460 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4461 4462 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4463 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4464 Selector GetterSel, Selector SetterSel, 4465 Decl *ClassCategory, 4466 bool *OverridingProperty, 4467 tok::ObjCKeywordKind MethodImplKind, 4468 DeclContext *lexicalDC = 0); 4469 4470 Decl *ActOnPropertyImplDecl(Scope *S, 4471 SourceLocation AtLoc, 4472 SourceLocation PropertyLoc, 4473 bool ImplKind,Decl *ClassImplDecl, 4474 IdentifierInfo *PropertyId, 4475 IdentifierInfo *PropertyIvar, 4476 SourceLocation PropertyIvarLoc); 4477 4478 struct ObjCArgInfo { 4479 IdentifierInfo *Name; 4480 SourceLocation NameLoc; 4481 // The Type is null if no type was specified, and the DeclSpec is invalid 4482 // in this case. 4483 ParsedType Type; 4484 ObjCDeclSpec DeclSpec; 4485 4486 /// ArgAttrs - Attribute list for this argument. 4487 AttributeList *ArgAttrs; 4488 }; 4489 4490 Decl *ActOnMethodDeclaration( 4491 Scope *S, 4492 SourceLocation BeginLoc, // location of the + or -. 4493 SourceLocation EndLoc, // location of the ; or {. 4494 tok::TokenKind MethodType, 4495 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4496 Selector Sel, 4497 // optional arguments. The number of types/arguments is obtained 4498 // from the Sel.getNumArgs(). 4499 ObjCArgInfo *ArgInfo, 4500 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4501 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4502 bool isVariadic = false); 4503 4504 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4505 // Will search "local" class/category implementations for a method decl. 4506 // Will also search in class's root looking for instance method. 4507 // Returns 0 if no method is found. 4508 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4509 ObjCInterfaceDecl *CDecl); 4510 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4511 ObjCInterfaceDecl *ClassDecl); 4512 4513 ExprResult 4514 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4515 Expr *BaseExpr, 4516 DeclarationName MemberName, 4517 SourceLocation MemberLoc, 4518 SourceLocation SuperLoc, QualType SuperType, 4519 bool Super); 4520 4521 ExprResult 4522 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4523 IdentifierInfo &propertyName, 4524 SourceLocation receiverNameLoc, 4525 SourceLocation propertyNameLoc); 4526 4527 ObjCMethodDecl *tryCaptureObjCSelf(); 4528 4529 /// \brief Describes the kind of message expression indicated by a message 4530 /// send that starts with an identifier. 4531 enum ObjCMessageKind { 4532 /// \brief The message is sent to 'super'. 4533 ObjCSuperMessage, 4534 /// \brief The message is an instance message. 4535 ObjCInstanceMessage, 4536 /// \brief The message is a class message, and the identifier is a type 4537 /// name. 4538 ObjCClassMessage 4539 }; 4540 4541 ObjCMessageKind getObjCMessageKind(Scope *S, 4542 IdentifierInfo *Name, 4543 SourceLocation NameLoc, 4544 bool IsSuper, 4545 bool HasTrailingDot, 4546 ParsedType &ReceiverType); 4547 4548 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4549 Selector Sel, 4550 SourceLocation LBracLoc, 4551 SourceLocation SelectorLoc, 4552 SourceLocation RBracLoc, 4553 MultiExprArg Args); 4554 4555 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4556 QualType ReceiverType, 4557 SourceLocation SuperLoc, 4558 Selector Sel, 4559 ObjCMethodDecl *Method, 4560 SourceLocation LBracLoc, 4561 SourceLocation SelectorLoc, 4562 SourceLocation RBracLoc, 4563 MultiExprArg Args); 4564 4565 ExprResult ActOnClassMessage(Scope *S, 4566 ParsedType Receiver, 4567 Selector Sel, 4568 SourceLocation LBracLoc, 4569 SourceLocation SelectorLoc, 4570 SourceLocation RBracLoc, 4571 MultiExprArg Args); 4572 4573 ExprResult BuildInstanceMessage(Expr *Receiver, 4574 QualType ReceiverType, 4575 SourceLocation SuperLoc, 4576 Selector Sel, 4577 ObjCMethodDecl *Method, 4578 SourceLocation LBracLoc, 4579 SourceLocation SelectorLoc, 4580 SourceLocation RBracLoc, 4581 MultiExprArg Args); 4582 4583 ExprResult ActOnInstanceMessage(Scope *S, 4584 Expr *Receiver, 4585 Selector Sel, 4586 SourceLocation LBracLoc, 4587 SourceLocation SelectorLoc, 4588 SourceLocation RBracLoc, 4589 MultiExprArg Args); 4590 4591 4592 enum PragmaOptionsAlignKind { 4593 POAK_Native, // #pragma options align=native 4594 POAK_Natural, // #pragma options align=natural 4595 POAK_Packed, // #pragma options align=packed 4596 POAK_Power, // #pragma options align=power 4597 POAK_Mac68k, // #pragma options align=mac68k 4598 POAK_Reset // #pragma options align=reset 4599 }; 4600 4601 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4602 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4603 SourceLocation PragmaLoc, 4604 SourceLocation KindLoc); 4605 4606 enum PragmaPackKind { 4607 PPK_Default, // #pragma pack([n]) 4608 PPK_Show, // #pragma pack(show), only supported by MSVC. 4609 PPK_Push, // #pragma pack(push, [identifier], [n]) 4610 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4611 }; 4612 4613 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4614 void ActOnPragmaPack(PragmaPackKind Kind, 4615 IdentifierInfo *Name, 4616 Expr *Alignment, 4617 SourceLocation PragmaLoc, 4618 SourceLocation LParenLoc, 4619 SourceLocation RParenLoc); 4620 4621 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4622 void ActOnPragmaUnused(const Token &Identifier, 4623 Scope *curScope, 4624 SourceLocation PragmaLoc); 4625 4626 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4627 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4628 SourceLocation PragmaLoc); 4629 4630 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4631 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4632 4633 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4634 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4635 SourceLocation PragmaLoc, 4636 SourceLocation WeakNameLoc); 4637 4638 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4639 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4640 IdentifierInfo* AliasName, 4641 SourceLocation PragmaLoc, 4642 SourceLocation WeakNameLoc, 4643 SourceLocation AliasNameLoc); 4644 4645 /// ActOnPragmaFPContract - Called on well formed 4646 /// #pragma {STDC,OPENCL} FP_CONTRACT 4647 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4648 4649 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4650 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4651 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4652 4653 /// FreePackedContext - Deallocate and null out PackContext. 4654 void FreePackedContext(); 4655 4656 /// PushNamespaceVisibilityAttr - Note that we've entered a 4657 /// namespace with a visibility attribute. 4658 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4659 4660 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4661 /// add an appropriate visibility attribute. 4662 void AddPushedVisibilityAttribute(Decl *RD); 4663 4664 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4665 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4666 void PopPragmaVisibility(); 4667 4668 /// FreeVisContext - Deallocate and null out VisContext. 4669 void FreeVisContext(); 4670 4671 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4672 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4673 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4674 4675 /// CastCategory - Get the correct forwarded implicit cast result category 4676 /// from the inner expression. 4677 ExprValueKind CastCategory(Expr *E); 4678 4679 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4680 /// cast. If there is already an implicit cast, merge into the existing one. 4681 /// If isLvalue, the result of the cast is an lvalue. 4682 void ImpCastExprToType(Expr *&Expr, QualType Type, CastKind CK, 4683 ExprValueKind VK = VK_RValue, 4684 const CXXCastPath *BasePath = 0); 4685 4686 /// IgnoredValueConversions - Given that an expression's result is 4687 /// syntactically ignored, perform any conversions that are 4688 /// required. 4689 void IgnoredValueConversions(Expr *&expr); 4690 4691 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4692 // functions and arrays to their respective pointers (C99 6.3.2.1). 4693 Expr *UsualUnaryConversions(Expr *&expr); 4694 4695 // DefaultFunctionArrayConversion - converts functions and arrays 4696 // to their respective pointers (C99 6.3.2.1). 4697 void DefaultFunctionArrayConversion(Expr *&expr); 4698 4699 // DefaultFunctionArrayLvalueConversion - converts functions and 4700 // arrays to their respective pointers and performs the 4701 // lvalue-to-rvalue conversion. 4702 void DefaultFunctionArrayLvalueConversion(Expr *&expr); 4703 4704 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4705 // the operand. This is DefaultFunctionArrayLvalueConversion, 4706 // except that it assumes the operand isn't of function or array 4707 // type. 4708 void DefaultLvalueConversion(Expr *&expr); 4709 4710 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4711 // do not have a prototype. Integer promotions are performed on each 4712 // argument, and arguments that have type float are promoted to double. 4713 void DefaultArgumentPromotion(Expr *&Expr); 4714 4715 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4716 enum VariadicCallType { 4717 VariadicFunction, 4718 VariadicBlock, 4719 VariadicMethod, 4720 VariadicConstructor, 4721 VariadicDoesNotApply 4722 }; 4723 4724 /// GatherArgumentsForCall - Collector argument expressions for various 4725 /// form of call prototypes. 4726 bool GatherArgumentsForCall(SourceLocation CallLoc, 4727 FunctionDecl *FDecl, 4728 const FunctionProtoType *Proto, 4729 unsigned FirstProtoArg, 4730 Expr **Args, unsigned NumArgs, 4731 llvm::SmallVector<Expr *, 8> &AllArgs, 4732 VariadicCallType CallType = VariadicDoesNotApply); 4733 4734 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4735 // will warn if the resulting type is not a POD type. 4736 bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT, 4737 FunctionDecl *FDecl); 4738 4739 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4740 // operands and then handles various conversions that are common to binary 4741 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4742 // routine returns the first non-arithmetic type found. The client is 4743 // responsible for emitting appropriate error diagnostics. 4744 QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr, 4745 bool isCompAssign = false); 4746 4747 /// AssignConvertType - All of the 'assignment' semantic checks return this 4748 /// enum to indicate whether the assignment was allowed. These checks are 4749 /// done for simple assignments, as well as initialization, return from 4750 /// function, argument passing, etc. The query is phrased in terms of a 4751 /// source and destination type. 4752 enum AssignConvertType { 4753 /// Compatible - the types are compatible according to the standard. 4754 Compatible, 4755 4756 /// PointerToInt - The assignment converts a pointer to an int, which we 4757 /// accept as an extension. 4758 PointerToInt, 4759 4760 /// IntToPointer - The assignment converts an int to a pointer, which we 4761 /// accept as an extension. 4762 IntToPointer, 4763 4764 /// FunctionVoidPointer - The assignment is between a function pointer and 4765 /// void*, which the standard doesn't allow, but we accept as an extension. 4766 FunctionVoidPointer, 4767 4768 /// IncompatiblePointer - The assignment is between two pointers types that 4769 /// are not compatible, but we accept them as an extension. 4770 IncompatiblePointer, 4771 4772 /// IncompatiblePointer - The assignment is between two pointers types which 4773 /// point to integers which have a different sign, but are otherwise identical. 4774 /// This is a subset of the above, but broken out because it's by far the most 4775 /// common case of incompatible pointers. 4776 IncompatiblePointerSign, 4777 4778 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4779 /// c/v/r qualifiers, which we accept as an extension. 4780 CompatiblePointerDiscardsQualifiers, 4781 4782 /// IncompatiblePointerDiscardsQualifiers - The assignment 4783 /// discards qualifiers that we don't permit to be discarded, 4784 /// like address spaces. 4785 IncompatiblePointerDiscardsQualifiers, 4786 4787 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4788 /// nested pointer types, and the qualifiers other than the first two 4789 /// levels differ e.g. char ** -> const char **, but we accept them as an 4790 /// extension. 4791 IncompatibleNestedPointerQualifiers, 4792 4793 /// IncompatibleVectors - The assignment is between two vector types that 4794 /// have the same size, which we accept as an extension. 4795 IncompatibleVectors, 4796 4797 /// IntToBlockPointer - The assignment converts an int to a block 4798 /// pointer. We disallow this. 4799 IntToBlockPointer, 4800 4801 /// IncompatibleBlockPointer - The assignment is between two block 4802 /// pointers types that are not compatible. 4803 IncompatibleBlockPointer, 4804 4805 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4806 /// id type and something else (that is incompatible with it). For example, 4807 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4808 IncompatibleObjCQualifiedId, 4809 4810 /// Incompatible - We reject this conversion outright, it is invalid to 4811 /// represent it in the AST. 4812 Incompatible 4813 }; 4814 4815 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4816 /// assignment conversion type specified by ConvTy. This returns true if the 4817 /// conversion was invalid or false if the conversion was accepted. 4818 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4819 SourceLocation Loc, 4820 QualType DstType, QualType SrcType, 4821 Expr *SrcExpr, AssignmentAction Action, 4822 bool *Complained = 0); 4823 4824 /// CheckAssignmentConstraints - Perform type checking for assignment, 4825 /// argument passing, variable initialization, and function return values. 4826 /// C99 6.5.16. 4827 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 4828 QualType lhs, QualType rhs); 4829 4830 /// Check assignment constraints and prepare for a conversion of the 4831 /// RHS to the LHS type. 4832 AssignConvertType CheckAssignmentConstraints(QualType lhs, Expr *&rhs, 4833 CastKind &Kind); 4834 4835 // CheckSingleAssignmentConstraints - Currently used by 4836 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4837 // this routine performs the default function/array converions. 4838 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4839 Expr *&rExpr); 4840 4841 // \brief If the lhs type is a transparent union, check whether we 4842 // can initialize the transparent union with the given expression. 4843 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4844 Expr *&rExpr); 4845 4846 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4847 4848 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4849 4850 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4851 AssignmentAction Action, 4852 bool AllowExplicit = false); 4853 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4854 AssignmentAction Action, 4855 bool AllowExplicit, 4856 ImplicitConversionSequence& ICS); 4857 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4858 const ImplicitConversionSequence& ICS, 4859 AssignmentAction Action, 4860 bool CStyle = false); 4861 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4862 const StandardConversionSequence& SCS, 4863 AssignmentAction Action, 4864 bool CStyle); 4865 4866 /// the following "Check" methods will return a valid/converted QualType 4867 /// or a null QualType (indicating an error diagnostic was issued). 4868 4869 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4870 QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4871 QualType CheckPointerToMemberOperands( // C++ 5.5 4872 Expr *&lex, Expr *&rex, ExprValueKind &VK, 4873 SourceLocation OpLoc, bool isIndirect); 4874 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4875 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign, 4876 bool isDivide); 4877 QualType CheckRemainderOperands( // C99 6.5.5 4878 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4879 QualType CheckAdditionOperands( // C99 6.5.6 4880 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4881 QualType CheckSubtractionOperands( // C99 6.5.6 4882 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4883 QualType CheckShiftOperands( // C99 6.5.7 4884 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4885 bool isCompAssign = false); 4886 QualType CheckCompareOperands( // C99 6.5.8/9 4887 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4888 bool isRelational); 4889 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4890 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4891 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4892 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc); 4893 // CheckAssignmentOperands is used for both simple and compound assignment. 4894 // For simple assignment, pass both expressions and a null converted type. 4895 // For compound assignment, pass both expressions and the converted type. 4896 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4897 Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType); 4898 4899 void ConvertPropertyForRValue(Expr *&E); 4900 void ConvertPropertyForLValue(Expr *&LHS, Expr *&RHS, QualType& LHSTy); 4901 4902 QualType CheckConditionalOperands( // C99 6.5.15 4903 Expr *&cond, Expr *&lhs, Expr *&rhs, 4904 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4905 QualType CXXCheckConditionalOperands( // C++ 5.16 4906 Expr *&cond, Expr *&lhs, Expr *&rhs, 4907 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4908 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4909 bool *NonStandardCompositeType = 0); 4910 4911 QualType FindCompositeObjCPointerType(Expr *&LHS, Expr *&RHS, 4912 SourceLocation questionLoc); 4913 4914 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 4915 SourceLocation QuestionLoc); 4916 4917 /// type checking for vector binary operators. 4918 QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4919 QualType CheckVectorCompareOperands(Expr *&lex, Expr *&rx, 4920 SourceLocation l, bool isRel); 4921 4922 /// type checking declaration initializers (C99 6.7.8) 4923 bool CheckInitList(const InitializedEntity &Entity, 4924 InitListExpr *&InitList, QualType &DeclType); 4925 bool CheckForConstantInitializer(Expr *e, QualType t); 4926 4927 // type checking C++ declaration initializers (C++ [dcl.init]). 4928 4929 /// ReferenceCompareResult - Expresses the result of comparing two 4930 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 4931 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 4932 enum ReferenceCompareResult { 4933 /// Ref_Incompatible - The two types are incompatible, so direct 4934 /// reference binding is not possible. 4935 Ref_Incompatible = 0, 4936 /// Ref_Related - The two types are reference-related, which means 4937 /// that their unqualified forms (T1 and T2) are either the same 4938 /// or T1 is a base class of T2. 4939 Ref_Related, 4940 /// Ref_Compatible_With_Added_Qualification - The two types are 4941 /// reference-compatible with added qualification, meaning that 4942 /// they are reference-compatible and the qualifiers on T1 (cv1) 4943 /// are greater than the qualifiers on T2 (cv2). 4944 Ref_Compatible_With_Added_Qualification, 4945 /// Ref_Compatible - The two types are reference-compatible and 4946 /// have equivalent qualifiers (cv1 == cv2). 4947 Ref_Compatible 4948 }; 4949 4950 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 4951 QualType T1, QualType T2, 4952 bool &DerivedToBase, 4953 bool &ObjCConversion); 4954 4955 /// CheckCastTypes - Check type constraints for casting between types under 4956 /// C semantics, or forward to CXXCheckCStyleCast in C++. 4957 bool CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *&CastExpr, 4958 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 4959 bool FunctionalStyle = false); 4960 4961 // CheckVectorCast - check type constraints for vectors. 4962 // Since vectors are an extension, there are no C standard reference for this. 4963 // We allow casting between vectors and integer datatypes of the same size. 4964 // returns true if the cast is invalid 4965 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 4966 CastKind &Kind); 4967 4968 // CheckExtVectorCast - check type constraints for extended vectors. 4969 // Since vectors are an extension, there are no C standard reference for this. 4970 // We allow casting between vectors and integer datatypes of the same size, 4971 // or vectors and the element type of that vector. 4972 // returns true if the cast is invalid 4973 bool CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *&CastExpr, 4974 CastKind &Kind); 4975 4976 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 4977 /// cast under C++ semantics. 4978 bool CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 4979 Expr *&CastExpr, CastKind &Kind, 4980 CXXCastPath &BasePath, bool FunctionalStyle); 4981 4982 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 4983 /// \param Method - May be null. 4984 /// \param [out] ReturnType - The return type of the send. 4985 /// \return true iff there were any incompatible types. 4986 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 4987 ObjCMethodDecl *Method, bool isClassMessage, 4988 SourceLocation lbrac, SourceLocation rbrac, 4989 QualType &ReturnType, ExprValueKind &VK); 4990 4991 /// CheckBooleanCondition - Diagnose problems involving the use of 4992 /// the given expression as a boolean condition (e.g. in an if 4993 /// statement). Also performs the standard function and array 4994 /// decays, possibly changing the input variable. 4995 /// 4996 /// \param Loc - A location associated with the condition, e.g. the 4997 /// 'if' keyword. 4998 /// \return true iff there were any errors 4999 bool CheckBooleanCondition(Expr *&CondExpr, SourceLocation Loc); 5000 5001 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5002 Expr *SubExpr); 5003 5004 /// DiagnoseAssignmentAsCondition - Given that an expression is 5005 /// being used as a boolean condition, warn if it's an assignment. 5006 void DiagnoseAssignmentAsCondition(Expr *E); 5007 5008 /// \brief Redundant parentheses over an equality comparison can indicate 5009 /// that the user intended an assignment used as condition. 5010 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5011 5012 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5013 bool CheckCXXBooleanCondition(Expr *&CondExpr); 5014 5015 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5016 /// the specified width and sign. If an overflow occurs, detect it and emit 5017 /// the specified diagnostic. 5018 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5019 unsigned NewWidth, bool NewSign, 5020 SourceLocation Loc, unsigned DiagID); 5021 5022 /// Checks that the Objective-C declaration is declared in the global scope. 5023 /// Emits an error and marks the declaration as invalid if it's not declared 5024 /// in the global scope. 5025 bool CheckObjCDeclScope(Decl *D); 5026 5027 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5028 /// and reports the appropriate diagnostics. Returns false on success. 5029 /// Can optionally return the value of the expression. 5030 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5031 5032 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5033 /// the correct width, and that the field type is valid. 5034 /// Returns false on success. 5035 /// Can optionally return whether the bit-field is of width 0 5036 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5037 QualType FieldTy, const Expr *BitWidth, 5038 bool *ZeroWidth = 0); 5039 5040 /// \name Code completion 5041 //@{ 5042 /// \brief Describes the context in which code completion occurs. 5043 enum ParserCompletionContext { 5044 /// \brief Code completion occurs at top-level or namespace context. 5045 PCC_Namespace, 5046 /// \brief Code completion occurs within a class, struct, or union. 5047 PCC_Class, 5048 /// \brief Code completion occurs within an Objective-C interface, protocol, 5049 /// or category. 5050 PCC_ObjCInterface, 5051 /// \brief Code completion occurs within an Objective-C implementation or 5052 /// category implementation 5053 PCC_ObjCImplementation, 5054 /// \brief Code completion occurs within the list of instance variables 5055 /// in an Objective-C interface, protocol, category, or implementation. 5056 PCC_ObjCInstanceVariableList, 5057 /// \brief Code completion occurs following one or more template 5058 /// headers. 5059 PCC_Template, 5060 /// \brief Code completion occurs following one or more template 5061 /// headers within a class. 5062 PCC_MemberTemplate, 5063 /// \brief Code completion occurs within an expression. 5064 PCC_Expression, 5065 /// \brief Code completion occurs within a statement, which may 5066 /// also be an expression or a declaration. 5067 PCC_Statement, 5068 /// \brief Code completion occurs at the beginning of the 5069 /// initialization statement (or expression) in a for loop. 5070 PCC_ForInit, 5071 /// \brief Code completion occurs within the condition of an if, 5072 /// while, switch, or for statement. 5073 PCC_Condition, 5074 /// \brief Code completion occurs within the body of a function on a 5075 /// recovery path, where we do not have a specific handle on our position 5076 /// in the grammar. 5077 PCC_RecoveryInFunction, 5078 /// \brief Code completion occurs where only a type is permitted. 5079 PCC_Type, 5080 /// \brief Code completion occurs in a parenthesized expression, which 5081 /// might also be a type cast. 5082 PCC_ParenthesizedExpression, 5083 /// \brief Code completion occurs within a sequence of declaration 5084 /// specifiers within a function, method, or block. 5085 PCC_LocalDeclarationSpecifiers 5086 }; 5087 5088 void CodeCompleteOrdinaryName(Scope *S, 5089 ParserCompletionContext CompletionContext); 5090 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5091 bool AllowNonIdentifiers, 5092 bool AllowNestedNameSpecifiers); 5093 5094 struct CodeCompleteExpressionData; 5095 void CodeCompleteExpression(Scope *S, 5096 const CodeCompleteExpressionData &Data); 5097 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5098 SourceLocation OpLoc, 5099 bool IsArrow); 5100 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5101 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5102 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5103 void CodeCompleteCase(Scope *S); 5104 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5105 void CodeCompleteInitializer(Scope *S, Decl *D); 5106 void CodeCompleteReturn(Scope *S); 5107 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5108 5109 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5110 bool EnteringContext); 5111 void CodeCompleteUsing(Scope *S); 5112 void CodeCompleteUsingDirective(Scope *S); 5113 void CodeCompleteNamespaceDecl(Scope *S); 5114 void CodeCompleteNamespaceAliasDecl(Scope *S); 5115 void CodeCompleteOperatorName(Scope *S); 5116 void CodeCompleteConstructorInitializer(Decl *Constructor, 5117 CXXCtorInitializer** Initializers, 5118 unsigned NumInitializers); 5119 5120 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5121 bool InInterface); 5122 void CodeCompleteObjCAtVisibility(Scope *S); 5123 void CodeCompleteObjCAtStatement(Scope *S); 5124 void CodeCompleteObjCAtExpression(Scope *S); 5125 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5126 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5127 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5128 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5129 bool IsParameter); 5130 void CodeCompleteObjCMessageReceiver(Scope *S); 5131 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5132 IdentifierInfo **SelIdents, 5133 unsigned NumSelIdents, 5134 bool AtArgumentExpression); 5135 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5136 IdentifierInfo **SelIdents, 5137 unsigned NumSelIdents, 5138 bool AtArgumentExpression, 5139 bool IsSuper = false); 5140 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5141 IdentifierInfo **SelIdents, 5142 unsigned NumSelIdents, 5143 bool AtArgumentExpression, 5144 ObjCInterfaceDecl *Super = 0); 5145 void CodeCompleteObjCForCollection(Scope *S, 5146 DeclGroupPtrTy IterationVar); 5147 void CodeCompleteObjCSelector(Scope *S, 5148 IdentifierInfo **SelIdents, 5149 unsigned NumSelIdents); 5150 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5151 unsigned NumProtocols); 5152 void CodeCompleteObjCProtocolDecl(Scope *S); 5153 void CodeCompleteObjCInterfaceDecl(Scope *S); 5154 void CodeCompleteObjCSuperclass(Scope *S, 5155 IdentifierInfo *ClassName, 5156 SourceLocation ClassNameLoc); 5157 void CodeCompleteObjCImplementationDecl(Scope *S); 5158 void CodeCompleteObjCInterfaceCategory(Scope *S, 5159 IdentifierInfo *ClassName, 5160 SourceLocation ClassNameLoc); 5161 void CodeCompleteObjCImplementationCategory(Scope *S, 5162 IdentifierInfo *ClassName, 5163 SourceLocation ClassNameLoc); 5164 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5165 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5166 IdentifierInfo *PropertyName, 5167 Decl *ObjCImpDecl); 5168 void CodeCompleteObjCMethodDecl(Scope *S, 5169 bool IsInstanceMethod, 5170 ParsedType ReturnType, 5171 Decl *IDecl); 5172 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5173 bool IsInstanceMethod, 5174 bool AtParameterName, 5175 ParsedType ReturnType, 5176 IdentifierInfo **SelIdents, 5177 unsigned NumSelIdents); 5178 void CodeCompletePreprocessorDirective(bool InConditional); 5179 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5180 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5181 void CodeCompletePreprocessorExpression(); 5182 void CodeCompletePreprocessorMacroArgument(Scope *S, 5183 IdentifierInfo *Macro, 5184 MacroInfo *MacroInfo, 5185 unsigned Argument); 5186 void CodeCompleteNaturalLanguage(); 5187 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5188 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5189 //@} 5190 5191 void PrintStats() const {} 5192 5193 //===--------------------------------------------------------------------===// 5194 // Extra semantic analysis beyond the C type system 5195 5196public: 5197 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5198 unsigned ByteNo) const; 5199 5200private: 5201 void CheckArrayAccess(const ArraySubscriptExpr *E); 5202 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5203 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5204 5205 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5206 bool CheckObjCString(Expr *Arg); 5207 5208 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5209 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5210 5211 bool SemaBuiltinVAStart(CallExpr *TheCall); 5212 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5213 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5214 5215public: 5216 // Used by C++ template instantiation. 5217 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5218 5219private: 5220 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5221 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5222 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5223 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5224 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5225 llvm::APSInt &Result); 5226 5227 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5228 bool HasVAListArg, unsigned format_idx, 5229 unsigned firstDataArg, bool isPrintf); 5230 5231 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5232 const CallExpr *TheCall, bool HasVAListArg, 5233 unsigned format_idx, unsigned firstDataArg, 5234 bool isPrintf); 5235 5236 void CheckNonNullArguments(const NonNullAttr *NonNull, 5237 const CallExpr *TheCall); 5238 5239 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5240 unsigned format_idx, unsigned firstDataArg, 5241 bool isPrintf); 5242 5243 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5244 SourceLocation ReturnLoc); 5245 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5246 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5247 5248 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5249 Expr *Init); 5250 5251 /// \brief The parser's current scope. 5252 /// 5253 /// The parser maintains this state here. 5254 Scope *CurScope; 5255 5256protected: 5257 friend class Parser; 5258 friend class InitializationSequence; 5259 5260 /// \brief Retrieve the parser's current scope. 5261 Scope *getCurScope() const { return CurScope; } 5262}; 5263 5264/// \brief RAII object that enters a new expression evaluation context. 5265class EnterExpressionEvaluationContext { 5266 Sema &Actions; 5267 5268public: 5269 EnterExpressionEvaluationContext(Sema &Actions, 5270 Sema::ExpressionEvaluationContext NewContext) 5271 : Actions(Actions) { 5272 Actions.PushExpressionEvaluationContext(NewContext); 5273 } 5274 5275 ~EnterExpressionEvaluationContext() { 5276 Actions.PopExpressionEvaluationContext(); 5277 } 5278}; 5279 5280} // end namespace clang 5281 5282#endif 5283