Sema.h revision be38c5f5d8fa7c43c52fafddee054b8fe8c2b964
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 bool WantNontrivialTypeSourceInfo = false); 797 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 798 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 799 SourceLocation IILoc, 800 Scope *S, 801 CXXScopeSpec *SS, 802 ParsedType &SuggestedType); 803 804 Decl *ActOnDeclarator(Scope *S, Declarator &D); 805 806 Decl *HandleDeclarator(Scope *S, Declarator &D, 807 MultiTemplateParamsArg TemplateParameterLists, 808 bool IsFunctionDefinition); 809 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 810 const LookupResult &Previous, 811 Scope *S); 812 void DiagnoseFunctionSpecifiers(Declarator& D); 813 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 814 void CheckShadow(Scope *S, VarDecl *D); 815 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 816 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 817 QualType R, TypeSourceInfo *TInfo, 818 LookupResult &Previous, bool &Redeclaration); 819 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 820 QualType R, TypeSourceInfo *TInfo, 821 LookupResult &Previous, 822 MultiTemplateParamsArg TemplateParamLists, 823 bool &Redeclaration); 824 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 825 bool &Redeclaration); 826 void CheckCompleteVariableDeclaration(VarDecl *var); 827 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 828 QualType R, TypeSourceInfo *TInfo, 829 LookupResult &Previous, 830 MultiTemplateParamsArg TemplateParamLists, 831 bool IsFunctionDefinition, 832 bool &Redeclaration); 833 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 834 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 835 void CheckFunctionDeclaration(Scope *S, 836 FunctionDecl *NewFD, LookupResult &Previous, 837 bool IsExplicitSpecialization, 838 bool &Redeclaration); 839 void CheckMain(FunctionDecl *FD); 840 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 841 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 842 SourceLocation Loc, 843 QualType T); 844 ParmVarDecl *CheckParameter(DeclContext *DC, 845 TypeSourceInfo *TSInfo, QualType T, 846 IdentifierInfo *Name, 847 SourceLocation NameLoc, 848 StorageClass SC, 849 StorageClass SCAsWritten); 850 void ActOnParamDefaultArgument(Decl *param, 851 SourceLocation EqualLoc, 852 Expr *defarg); 853 void ActOnParamUnparsedDefaultArgument(Decl *param, 854 SourceLocation EqualLoc, 855 SourceLocation ArgLoc); 856 void ActOnParamDefaultArgumentError(Decl *param); 857 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 858 SourceLocation EqualLoc); 859 860 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 861 bool TypeMayContainAuto); 862 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 863 void ActOnInitializerError(Decl *Dcl); 864 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 865 void FinalizeDeclaration(Decl *D); 866 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 867 Decl **Group, 868 unsigned NumDecls); 869 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 870 bool TypeMayContainAuto = true); 871 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 872 SourceLocation LocAfterDecls); 873 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 874 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 875 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 876 877 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 878 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 879 880 /// \brief Diagnose any unused parameters in the given sequence of 881 /// ParmVarDecl pointers. 882 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 883 ParmVarDecl * const *End); 884 885 /// \brief Diagnose whether the size of parameters or return value of a 886 /// function or obj-c method definition is pass-by-value and larger than a 887 /// specified threshold. 888 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 889 ParmVarDecl * const *End, 890 QualType ReturnTy, 891 NamedDecl *D); 892 893 void DiagnoseInvalidJumps(Stmt *Body); 894 Decl *ActOnFileScopeAsmDecl(SourceLocation Loc, Expr *expr); 895 896 /// Scope actions. 897 void ActOnPopScope(SourceLocation Loc, Scope *S); 898 void ActOnTranslationUnitScope(Scope *S); 899 900 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 901 /// no declarator (e.g. "struct foo;") is parsed. 902 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 903 DeclSpec &DS); 904 905 StmtResult ActOnVlaStmt(const DeclSpec &DS); 906 907 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 908 AccessSpecifier AS, 909 RecordDecl *Record); 910 911 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 912 RecordDecl *Record); 913 914 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 915 TagTypeKind NewTag, 916 SourceLocation NewTagLoc, 917 const IdentifierInfo &Name); 918 919 enum TagUseKind { 920 TUK_Reference, // Reference to a tag: 'struct foo *X;' 921 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 922 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 923 TUK_Friend // Friend declaration: 'friend struct foo;' 924 }; 925 926 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 927 SourceLocation KWLoc, CXXScopeSpec &SS, 928 IdentifierInfo *Name, SourceLocation NameLoc, 929 AttributeList *Attr, AccessSpecifier AS, 930 MultiTemplateParamsArg TemplateParameterLists, 931 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 932 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 933 934 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 935 unsigned TagSpec, SourceLocation TagLoc, 936 CXXScopeSpec &SS, 937 IdentifierInfo *Name, SourceLocation NameLoc, 938 AttributeList *Attr, 939 MultiTemplateParamsArg TempParamLists); 940 941 TypeResult ActOnDependentTag(Scope *S, 942 unsigned TagSpec, 943 TagUseKind TUK, 944 const CXXScopeSpec &SS, 945 IdentifierInfo *Name, 946 SourceLocation TagLoc, 947 SourceLocation NameLoc); 948 949 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 950 IdentifierInfo *ClassName, 951 llvm::SmallVectorImpl<Decl *> &Decls); 952 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 953 Declarator &D, Expr *BitfieldWidth); 954 955 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 956 Declarator &D, Expr *BitfieldWidth, 957 AccessSpecifier AS); 958 959 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 960 TypeSourceInfo *TInfo, 961 RecordDecl *Record, SourceLocation Loc, 962 bool Mutable, Expr *BitfieldWidth, 963 SourceLocation TSSL, 964 AccessSpecifier AS, NamedDecl *PrevDecl, 965 Declarator *D = 0); 966 967 enum CXXSpecialMember { 968 CXXInvalid = -1, 969 CXXConstructor = 0, 970 CXXCopyConstructor = 1, 971 CXXCopyAssignment = 2, 972 CXXDestructor = 3 973 }; 974 bool CheckNontrivialField(FieldDecl *FD); 975 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 976 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 977 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 978 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 979 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 980 Declarator &D, Expr *BitfieldWidth, 981 tok::ObjCKeywordKind visibility); 982 983 // This is used for both record definitions and ObjC interface declarations. 984 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 985 Decl **Fields, unsigned NumFields, 986 SourceLocation LBrac, SourceLocation RBrac, 987 AttributeList *AttrList); 988 989 /// ActOnTagStartDefinition - Invoked when we have entered the 990 /// scope of a tag's definition (e.g., for an enumeration, class, 991 /// struct, or union). 992 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 993 994 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 995 /// C++ record definition's base-specifiers clause and are starting its 996 /// member declarations. 997 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 998 ClassVirtSpecifiers &CVS, 999 SourceLocation LBraceLoc); 1000 1001 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1002 /// the definition of a tag (enumeration, class, struct, or union). 1003 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1004 SourceLocation RBraceLoc); 1005 1006 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1007 /// error parsing the definition of a tag. 1008 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1009 1010 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1011 EnumConstantDecl *LastEnumConst, 1012 SourceLocation IdLoc, 1013 IdentifierInfo *Id, 1014 Expr *val); 1015 1016 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1017 SourceLocation IdLoc, IdentifierInfo *Id, 1018 AttributeList *Attrs, 1019 SourceLocation EqualLoc, Expr *Val); 1020 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1021 SourceLocation RBraceLoc, Decl *EnumDecl, 1022 Decl **Elements, unsigned NumElements, 1023 Scope *S, AttributeList *Attr); 1024 1025 DeclContext *getContainingDC(DeclContext *DC); 1026 1027 /// Set the current declaration context until it gets popped. 1028 void PushDeclContext(Scope *S, DeclContext *DC); 1029 void PopDeclContext(); 1030 1031 /// EnterDeclaratorContext - Used when we must lookup names in the context 1032 /// of a declarator's nested name specifier. 1033 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1034 void ExitDeclaratorContext(Scope *S); 1035 1036 DeclContext *getFunctionLevelDeclContext(); 1037 1038 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1039 /// to the function decl for the function being parsed. If we're currently 1040 /// in a 'block', this returns the containing context. 1041 FunctionDecl *getCurFunctionDecl(); 1042 1043 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1044 /// the method decl for the method being parsed. If we're currently 1045 /// in a 'block', this returns the containing context. 1046 ObjCMethodDecl *getCurMethodDecl(); 1047 1048 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1049 /// or C function we're in, otherwise return null. If we're currently 1050 /// in a 'block', this returns the containing context. 1051 NamedDecl *getCurFunctionOrMethodDecl(); 1052 1053 /// Add this decl to the scope shadowed decl chains. 1054 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1055 1056 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1057 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1058 /// true if 'D' belongs to the given declaration context. 1059 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0); 1060 1061 /// Finds the scope corresponding to the given decl context, if it 1062 /// happens to be an enclosing scope. Otherwise return NULL. 1063 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1064 1065 /// Subroutines of ActOnDeclarator(). 1066 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1067 TypeSourceInfo *TInfo); 1068 void MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls); 1069 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1070 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1071 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1072 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1073 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1074 1075 // AssignmentAction - This is used by all the assignment diagnostic functions 1076 // to represent what is actually causing the operation 1077 enum AssignmentAction { 1078 AA_Assigning, 1079 AA_Passing, 1080 AA_Returning, 1081 AA_Converting, 1082 AA_Initializing, 1083 AA_Sending, 1084 AA_Casting 1085 }; 1086 1087 /// C++ Overloading. 1088 enum OverloadKind { 1089 /// This is a legitimate overload: the existing declarations are 1090 /// functions or function templates with different signatures. 1091 Ovl_Overload, 1092 1093 /// This is not an overload because the signature exactly matches 1094 /// an existing declaration. 1095 Ovl_Match, 1096 1097 /// This is not an overload because the lookup results contain a 1098 /// non-function. 1099 Ovl_NonFunction 1100 }; 1101 OverloadKind CheckOverload(Scope *S, 1102 FunctionDecl *New, 1103 const LookupResult &OldDecls, 1104 NamedDecl *&OldDecl, 1105 bool IsForUsingDecl); 1106 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1107 1108 bool TryImplicitConversion(InitializationSequence &Sequence, 1109 const InitializedEntity &Entity, 1110 Expr *From, 1111 bool SuppressUserConversions, 1112 bool AllowExplicit, 1113 bool InOverloadResolution, 1114 bool CStyle); 1115 1116 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1117 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1118 bool IsComplexPromotion(QualType FromType, QualType ToType); 1119 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1120 bool InOverloadResolution, 1121 QualType& ConvertedType, bool &IncompatibleObjC); 1122 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1123 QualType& ConvertedType, bool &IncompatibleObjC); 1124 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1125 QualType& ConvertedType); 1126 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1127 const FunctionProtoType *NewType); 1128 1129 bool CheckPointerConversion(Expr *From, QualType ToType, 1130 CastKind &Kind, 1131 CXXCastPath& BasePath, 1132 bool IgnoreBaseAccess); 1133 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1134 bool InOverloadResolution, 1135 QualType &ConvertedType); 1136 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1137 CastKind &Kind, 1138 CXXCastPath &BasePath, 1139 bool IgnoreBaseAccess); 1140 bool IsQualificationConversion(QualType FromType, QualType ToType, 1141 bool CStyle); 1142 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1143 1144 1145 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1146 const VarDecl *NRVOCandidate, 1147 QualType ResultType, 1148 Expr *Value); 1149 1150 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1151 SourceLocation EqualLoc, 1152 ExprResult Init); 1153 bool PerformObjectArgumentInitialization(Expr *&From, 1154 NestedNameSpecifier *Qualifier, 1155 NamedDecl *FoundDecl, 1156 CXXMethodDecl *Method); 1157 1158 bool PerformContextuallyConvertToBool(Expr *&From); 1159 bool PerformContextuallyConvertToObjCId(Expr *&From); 1160 1161 ExprResult 1162 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1163 const PartialDiagnostic &NotIntDiag, 1164 const PartialDiagnostic &IncompleteDiag, 1165 const PartialDiagnostic &ExplicitConvDiag, 1166 const PartialDiagnostic &ExplicitConvNote, 1167 const PartialDiagnostic &AmbigDiag, 1168 const PartialDiagnostic &AmbigNote, 1169 const PartialDiagnostic &ConvDiag); 1170 1171 bool PerformObjectMemberConversion(Expr *&From, 1172 NestedNameSpecifier *Qualifier, 1173 NamedDecl *FoundDecl, 1174 NamedDecl *Member); 1175 1176 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1177 // TODO: make this is a typesafe union. 1178 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1179 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1180 1181 void AddOverloadCandidate(NamedDecl *Function, 1182 DeclAccessPair FoundDecl, 1183 Expr **Args, unsigned NumArgs, 1184 OverloadCandidateSet &CandidateSet); 1185 1186 void AddOverloadCandidate(FunctionDecl *Function, 1187 DeclAccessPair FoundDecl, 1188 Expr **Args, unsigned NumArgs, 1189 OverloadCandidateSet& CandidateSet, 1190 bool SuppressUserConversions = false, 1191 bool PartialOverloading = false); 1192 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1193 Expr **Args, unsigned NumArgs, 1194 OverloadCandidateSet& CandidateSet, 1195 bool SuppressUserConversions = false); 1196 void AddMethodCandidate(DeclAccessPair FoundDecl, 1197 QualType ObjectType, 1198 Expr::Classification ObjectClassification, 1199 Expr **Args, unsigned NumArgs, 1200 OverloadCandidateSet& CandidateSet, 1201 bool SuppressUserConversion = false); 1202 void AddMethodCandidate(CXXMethodDecl *Method, 1203 DeclAccessPair FoundDecl, 1204 CXXRecordDecl *ActingContext, QualType ObjectType, 1205 Expr::Classification ObjectClassification, 1206 Expr **Args, unsigned NumArgs, 1207 OverloadCandidateSet& CandidateSet, 1208 bool SuppressUserConversions = false); 1209 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1210 DeclAccessPair FoundDecl, 1211 CXXRecordDecl *ActingContext, 1212 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1213 QualType ObjectType, 1214 Expr::Classification ObjectClassification, 1215 Expr **Args, unsigned NumArgs, 1216 OverloadCandidateSet& CandidateSet, 1217 bool SuppressUserConversions = false); 1218 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1219 DeclAccessPair FoundDecl, 1220 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1221 Expr **Args, unsigned NumArgs, 1222 OverloadCandidateSet& CandidateSet, 1223 bool SuppressUserConversions = false); 1224 void AddConversionCandidate(CXXConversionDecl *Conversion, 1225 DeclAccessPair FoundDecl, 1226 CXXRecordDecl *ActingContext, 1227 Expr *From, QualType ToType, 1228 OverloadCandidateSet& CandidateSet); 1229 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1230 DeclAccessPair FoundDecl, 1231 CXXRecordDecl *ActingContext, 1232 Expr *From, QualType ToType, 1233 OverloadCandidateSet &CandidateSet); 1234 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1235 DeclAccessPair FoundDecl, 1236 CXXRecordDecl *ActingContext, 1237 const FunctionProtoType *Proto, 1238 Expr *Object, Expr **Args, unsigned NumArgs, 1239 OverloadCandidateSet& CandidateSet); 1240 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1241 SourceLocation OpLoc, 1242 Expr **Args, unsigned NumArgs, 1243 OverloadCandidateSet& CandidateSet, 1244 SourceRange OpRange = SourceRange()); 1245 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1246 Expr **Args, unsigned NumArgs, 1247 OverloadCandidateSet& CandidateSet, 1248 bool IsAssignmentOperator = false, 1249 unsigned NumContextualBoolArguments = 0); 1250 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1251 SourceLocation OpLoc, 1252 Expr **Args, unsigned NumArgs, 1253 OverloadCandidateSet& CandidateSet); 1254 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1255 bool Operator, 1256 Expr **Args, unsigned NumArgs, 1257 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1258 OverloadCandidateSet& CandidateSet, 1259 bool PartialOverloading = false); 1260 1261 // Emit as a 'note' the specific overload candidate 1262 void NoteOverloadCandidate(FunctionDecl *Fn); 1263 1264 // Emit as a series of 'note's all template and non-templates 1265 // identified by the expression Expr 1266 void NoteAllOverloadCandidates(Expr* E); 1267 1268 // [PossiblyAFunctionType] --> [Return] 1269 // NonFunctionType --> NonFunctionType 1270 // R (A) --> R(A) 1271 // R (*)(A) --> R (A) 1272 // R (&)(A) --> R (A) 1273 // R (S::*)(A) --> R (A) 1274 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1275 1276 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1277 bool Complain, 1278 DeclAccessPair &Found); 1279 1280 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1281 bool Complain = false, 1282 DeclAccessPair* Found = 0); 1283 1284 Expr *FixOverloadedFunctionReference(Expr *E, 1285 DeclAccessPair FoundDecl, 1286 FunctionDecl *Fn); 1287 ExprResult FixOverloadedFunctionReference(ExprResult, 1288 DeclAccessPair FoundDecl, 1289 FunctionDecl *Fn); 1290 1291 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1292 Expr **Args, unsigned NumArgs, 1293 OverloadCandidateSet &CandidateSet, 1294 bool PartialOverloading = false); 1295 1296 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1297 UnresolvedLookupExpr *ULE, 1298 SourceLocation LParenLoc, 1299 Expr **Args, unsigned NumArgs, 1300 SourceLocation RParenLoc, 1301 Expr *ExecConfig); 1302 1303 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1304 unsigned Opc, 1305 const UnresolvedSetImpl &Fns, 1306 Expr *input); 1307 1308 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1309 unsigned Opc, 1310 const UnresolvedSetImpl &Fns, 1311 Expr *LHS, Expr *RHS); 1312 1313 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1314 SourceLocation RLoc, 1315 Expr *Base,Expr *Idx); 1316 1317 ExprResult 1318 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1319 SourceLocation LParenLoc, Expr **Args, 1320 unsigned NumArgs, SourceLocation RParenLoc); 1321 ExprResult 1322 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1323 Expr **Args, unsigned NumArgs, 1324 SourceLocation RParenLoc); 1325 1326 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1327 SourceLocation OpLoc); 1328 1329 /// CheckCallReturnType - Checks that a call expression's return type is 1330 /// complete. Returns true on failure. The location passed in is the location 1331 /// that best represents the call. 1332 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1333 CallExpr *CE, FunctionDecl *FD); 1334 1335 /// Helpers for dealing with blocks and functions. 1336 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1337 bool CheckParameterNames); 1338 void CheckCXXDefaultArguments(FunctionDecl *FD); 1339 void CheckExtraCXXDefaultArguments(Declarator &D); 1340 Scope *getNonFieldDeclScope(Scope *S); 1341 1342 /// \name Name lookup 1343 /// 1344 /// These routines provide name lookup that is used during semantic 1345 /// analysis to resolve the various kinds of names (identifiers, 1346 /// overloaded operator names, constructor names, etc.) into zero or 1347 /// more declarations within a particular scope. The major entry 1348 /// points are LookupName, which performs unqualified name lookup, 1349 /// and LookupQualifiedName, which performs qualified name lookup. 1350 /// 1351 /// All name lookup is performed based on some specific criteria, 1352 /// which specify what names will be visible to name lookup and how 1353 /// far name lookup should work. These criteria are important both 1354 /// for capturing language semantics (certain lookups will ignore 1355 /// certain names, for example) and for performance, since name 1356 /// lookup is often a bottleneck in the compilation of C++. Name 1357 /// lookup criteria is specified via the LookupCriteria enumeration. 1358 /// 1359 /// The results of name lookup can vary based on the kind of name 1360 /// lookup performed, the current language, and the translation 1361 /// unit. In C, for example, name lookup will either return nothing 1362 /// (no entity found) or a single declaration. In C++, name lookup 1363 /// can additionally refer to a set of overloaded functions or 1364 /// result in an ambiguity. All of the possible results of name 1365 /// lookup are captured by the LookupResult class, which provides 1366 /// the ability to distinguish among them. 1367 //@{ 1368 1369 /// @brief Describes the kind of name lookup to perform. 1370 enum LookupNameKind { 1371 /// Ordinary name lookup, which finds ordinary names (functions, 1372 /// variables, typedefs, etc.) in C and most kinds of names 1373 /// (functions, variables, members, types, etc.) in C++. 1374 LookupOrdinaryName = 0, 1375 /// Tag name lookup, which finds the names of enums, classes, 1376 /// structs, and unions. 1377 LookupTagName, 1378 /// Label name lookup. 1379 LookupLabel, 1380 /// Member name lookup, which finds the names of 1381 /// class/struct/union members. 1382 LookupMemberName, 1383 /// Look up of an operator name (e.g., operator+) for use with 1384 /// operator overloading. This lookup is similar to ordinary name 1385 /// lookup, but will ignore any declarations that are class members. 1386 LookupOperatorName, 1387 /// Look up of a name that precedes the '::' scope resolution 1388 /// operator in C++. This lookup completely ignores operator, object, 1389 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1390 LookupNestedNameSpecifierName, 1391 /// Look up a namespace name within a C++ using directive or 1392 /// namespace alias definition, ignoring non-namespace names (C++ 1393 /// [basic.lookup.udir]p1). 1394 LookupNamespaceName, 1395 /// Look up all declarations in a scope with the given name, 1396 /// including resolved using declarations. This is appropriate 1397 /// for checking redeclarations for a using declaration. 1398 LookupUsingDeclName, 1399 /// Look up an ordinary name that is going to be redeclared as a 1400 /// name with linkage. This lookup ignores any declarations that 1401 /// are outside of the current scope unless they have linkage. See 1402 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1403 LookupRedeclarationWithLinkage, 1404 /// Look up the name of an Objective-C protocol. 1405 LookupObjCProtocolName, 1406 /// \brief Look up any declaration with any name. 1407 LookupAnyName 1408 }; 1409 1410 /// \brief Specifies whether (or how) name lookup is being performed for a 1411 /// redeclaration (vs. a reference). 1412 enum RedeclarationKind { 1413 /// \brief The lookup is a reference to this name that is not for the 1414 /// purpose of redeclaring the name. 1415 NotForRedeclaration = 0, 1416 /// \brief The lookup results will be used for redeclaration of a name, 1417 /// if an entity by that name already exists. 1418 ForRedeclaration 1419 }; 1420 1421private: 1422 bool CppLookupName(LookupResult &R, Scope *S); 1423 1424public: 1425 /// \brief Look up a name, looking for a single declaration. Return 1426 /// null if the results were absent, ambiguous, or overloaded. 1427 /// 1428 /// It is preferable to use the elaborated form and explicitly handle 1429 /// ambiguity and overloaded. 1430 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1431 SourceLocation Loc, 1432 LookupNameKind NameKind, 1433 RedeclarationKind Redecl 1434 = NotForRedeclaration); 1435 bool LookupName(LookupResult &R, Scope *S, 1436 bool AllowBuiltinCreation = false); 1437 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1438 bool InUnqualifiedLookup = false); 1439 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1440 bool AllowBuiltinCreation = false, 1441 bool EnteringContext = false); 1442 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1443 1444 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1445 QualType T1, QualType T2, 1446 UnresolvedSetImpl &Functions); 1447 1448 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation Loc, 1449 bool isLocalLabel = false); 1450 1451 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1452 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1453 1454 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1455 Expr **Args, unsigned NumArgs, 1456 ADLResult &Functions); 1457 1458 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1459 VisibleDeclConsumer &Consumer, 1460 bool IncludeGlobalScope = true); 1461 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1462 VisibleDeclConsumer &Consumer, 1463 bool IncludeGlobalScope = true); 1464 1465 /// \brief The context in which typo-correction occurs. 1466 /// 1467 /// The typo-correction context affects which keywords (if any) are 1468 /// considered when trying to correct for typos. 1469 enum CorrectTypoContext { 1470 /// \brief An unknown context, where any keyword might be valid. 1471 CTC_Unknown, 1472 /// \brief A context where no keywords are used (e.g. we expect an actual 1473 /// name). 1474 CTC_NoKeywords, 1475 /// \brief A context where we're correcting a type name. 1476 CTC_Type, 1477 /// \brief An expression context. 1478 CTC_Expression, 1479 /// \brief A type cast, or anything else that can be followed by a '<'. 1480 CTC_CXXCasts, 1481 /// \brief A member lookup context. 1482 CTC_MemberLookup, 1483 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1484 CTC_ObjCIvarLookup, 1485 /// \brief An Objective-C property lookup context (e.g., self.prop). 1486 CTC_ObjCPropertyLookup, 1487 /// \brief The receiver of an Objective-C message send within an 1488 /// Objective-C method where 'super' is a valid keyword. 1489 CTC_ObjCMessageReceiver 1490 }; 1491 1492 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1493 DeclContext *MemberContext = 0, 1494 bool EnteringContext = false, 1495 CorrectTypoContext CTC = CTC_Unknown, 1496 const ObjCObjectPointerType *OPT = 0); 1497 1498 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1499 AssociatedNamespaceSet &AssociatedNamespaces, 1500 AssociatedClassSet &AssociatedClasses); 1501 1502 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1503 //@} 1504 1505 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1506 SourceLocation IdLoc, 1507 bool TypoCorrection = false); 1508 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1509 Scope *S, bool ForRedeclaration, 1510 SourceLocation Loc); 1511 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1512 Scope *S); 1513 void AddKnownFunctionAttributes(FunctionDecl *FD); 1514 1515 // More parsing and symbol table subroutines. 1516 1517 // Decl attributes - this routine is the top level dispatcher. 1518 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1519 bool NonInheritable = true, bool Inheritable = true); 1520 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1521 bool NonInheritable = true, bool Inheritable = true); 1522 1523 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1524 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1525 bool CheckNoReturnAttr(const AttributeList &attr); 1526 1527 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1528 bool &IncompleteImpl, unsigned DiagID); 1529 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1530 ObjCMethodDecl *MethodDecl, 1531 bool IsProtocolMethodDecl); 1532 1533 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1534 ObjCInterfaceDecl *IDecl); 1535 1536 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1537 1538 /// CheckProtocolMethodDefs - This routine checks unimplemented 1539 /// methods declared in protocol, and those referenced by it. 1540 /// \param IDecl - Used for checking for methods which may have been 1541 /// inherited. 1542 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1543 ObjCProtocolDecl *PDecl, 1544 bool& IncompleteImpl, 1545 const SelectorSet &InsMap, 1546 const SelectorSet &ClsMap, 1547 ObjCContainerDecl *CDecl); 1548 1549 /// CheckImplementationIvars - This routine checks if the instance variables 1550 /// listed in the implelementation match those listed in the interface. 1551 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1552 ObjCIvarDecl **Fields, unsigned nIvars, 1553 SourceLocation Loc); 1554 1555 /// \brief Determine whether we can synthesize a provisional ivar for the 1556 /// given name. 1557 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1558 1559 /// \brief Determine whether we can synthesize a provisional ivar for the 1560 /// given property. 1561 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1562 1563 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1564 /// remains unimplemented in the class or category @implementation. 1565 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1566 ObjCContainerDecl* IDecl, 1567 bool IncompleteImpl = false); 1568 1569 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1570 /// which must be implemented by this implementation. 1571 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1572 ObjCContainerDecl *CDecl, 1573 const SelectorSet &InsMap); 1574 1575 /// DefaultSynthesizeProperties - This routine default synthesizes all 1576 /// properties which must be synthesized in class's @implementation. 1577 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1578 ObjCInterfaceDecl *IDecl); 1579 1580 /// CollectImmediateProperties - This routine collects all properties in 1581 /// the class and its conforming protocols; but not those it its super class. 1582 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1583 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1584 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1585 1586 1587 /// LookupPropertyDecl - Looks up a property in the current class and all 1588 /// its protocols. 1589 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1590 IdentifierInfo *II); 1591 1592 /// Called by ActOnProperty to handle @property declarations in 1593 //// class extensions. 1594 Decl *HandlePropertyInClassExtension(Scope *S, 1595 ObjCCategoryDecl *CDecl, 1596 SourceLocation AtLoc, 1597 FieldDeclarator &FD, 1598 Selector GetterSel, 1599 Selector SetterSel, 1600 const bool isAssign, 1601 const bool isReadWrite, 1602 const unsigned Attributes, 1603 bool *isOverridingProperty, 1604 TypeSourceInfo *T, 1605 tok::ObjCKeywordKind MethodImplKind); 1606 1607 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1608 /// handle creating the ObjcPropertyDecl for a category or @interface. 1609 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1610 ObjCContainerDecl *CDecl, 1611 SourceLocation AtLoc, 1612 FieldDeclarator &FD, 1613 Selector GetterSel, 1614 Selector SetterSel, 1615 const bool isAssign, 1616 const bool isReadWrite, 1617 const unsigned Attributes, 1618 TypeSourceInfo *T, 1619 tok::ObjCKeywordKind MethodImplKind, 1620 DeclContext *lexicalDC = 0); 1621 1622 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1623 /// warning) when atomic property has one but not the other user-declared 1624 /// setter or getter. 1625 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1626 ObjCContainerDecl* IDecl); 1627 1628 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1629 1630 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1631 /// true, or false, accordingly. 1632 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1633 const ObjCMethodDecl *PrevMethod, 1634 bool matchBasedOnSizeAndAlignment = false, 1635 bool matchBasedOnStrictEqulity = false); 1636 1637 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1638 /// or protocol against those declared in their implementations. 1639 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1640 const SelectorSet &ClsMap, 1641 SelectorSet &InsMapSeen, 1642 SelectorSet &ClsMapSeen, 1643 ObjCImplDecl* IMPDecl, 1644 ObjCContainerDecl* IDecl, 1645 bool &IncompleteImpl, 1646 bool ImmediateClass); 1647 1648private: 1649 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1650 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1651 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1652 1653 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1654 /// optionally warns if there are multiple signatures. 1655 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1656 bool receiverIdOrClass, 1657 bool warn, bool instance); 1658 1659public: 1660 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1661 /// unit are added to a global pool. This allows us to efficiently associate 1662 /// a selector with a method declaraation for purposes of typechecking 1663 /// messages sent to "id" (where the class of the object is unknown). 1664 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1665 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1666 } 1667 1668 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1669 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1670 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1671 } 1672 1673 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1674 /// there are multiple signatures. 1675 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1676 bool receiverIdOrClass=false, 1677 bool warn=true) { 1678 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1679 warn, /*instance*/true); 1680 } 1681 1682 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1683 /// there are multiple signatures. 1684 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1685 bool receiverIdOrClass=false, 1686 bool warn=true) { 1687 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1688 warn, /*instance*/false); 1689 } 1690 1691 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1692 /// implementation. 1693 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1694 1695 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1696 /// initialization. 1697 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1698 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1699 //===--------------------------------------------------------------------===// 1700 // Statement Parsing Callbacks: SemaStmt.cpp. 1701public: 1702 class FullExprArg { 1703 public: 1704 FullExprArg(Sema &actions) : E(0) { } 1705 1706 // FIXME: The const_cast here is ugly. RValue references would make this 1707 // much nicer (or we could duplicate a bunch of the move semantics 1708 // emulation code from Ownership.h). 1709 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1710 1711 ExprResult release() { 1712 return move(E); 1713 } 1714 1715 Expr *get() const { return E; } 1716 1717 Expr *operator->() { 1718 return E; 1719 } 1720 1721 private: 1722 // FIXME: No need to make the entire Sema class a friend when it's just 1723 // Sema::MakeFullExpr that needs access to the constructor below. 1724 friend class Sema; 1725 1726 explicit FullExprArg(Expr *expr) : E(expr) {} 1727 1728 Expr *E; 1729 }; 1730 1731 FullExprArg MakeFullExpr(Expr *Arg) { 1732 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1733 } 1734 1735 StmtResult ActOnExprStmt(FullExprArg Expr); 1736 1737 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1738 bool LeadingEmptyMacro = false); 1739 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1740 MultiStmtArg Elts, 1741 bool isStmtExpr); 1742 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1743 SourceLocation StartLoc, 1744 SourceLocation EndLoc); 1745 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1746 StmtResult ActOnForEachLValueExpr(Expr *E); 1747 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1748 SourceLocation DotDotDotLoc, Expr *RHSVal, 1749 SourceLocation ColonLoc); 1750 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1751 1752 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1753 SourceLocation ColonLoc, 1754 Stmt *SubStmt, Scope *CurScope); 1755 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1756 SourceLocation ColonLoc, Stmt *SubStmt); 1757 1758 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1759 FullExprArg CondVal, Decl *CondVar, 1760 Stmt *ThenVal, 1761 SourceLocation ElseLoc, Stmt *ElseVal); 1762 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1763 Expr *Cond, 1764 Decl *CondVar); 1765 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1766 Stmt *Switch, Stmt *Body); 1767 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1768 FullExprArg Cond, 1769 Decl *CondVar, Stmt *Body); 1770 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1771 SourceLocation WhileLoc, 1772 SourceLocation CondLParen, Expr *Cond, 1773 SourceLocation CondRParen); 1774 1775 StmtResult ActOnForStmt(SourceLocation ForLoc, 1776 SourceLocation LParenLoc, 1777 Stmt *First, FullExprArg Second, 1778 Decl *SecondVar, 1779 FullExprArg Third, 1780 SourceLocation RParenLoc, 1781 Stmt *Body); 1782 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1783 SourceLocation LParenLoc, 1784 Stmt *First, Expr *Second, 1785 SourceLocation RParenLoc, Stmt *Body); 1786 1787 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1788 SourceLocation LabelLoc, 1789 LabelDecl *TheDecl); 1790 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1791 SourceLocation StarLoc, 1792 Expr *DestExp); 1793 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1794 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1795 1796 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1797 bool AllowFunctionParameters); 1798 1799 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1800 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1801 1802 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1803 bool IsSimple, bool IsVolatile, 1804 unsigned NumOutputs, unsigned NumInputs, 1805 IdentifierInfo **Names, 1806 MultiExprArg Constraints, 1807 MultiExprArg Exprs, 1808 Expr *AsmString, 1809 MultiExprArg Clobbers, 1810 SourceLocation RParenLoc, 1811 bool MSAsm = false); 1812 1813 1814 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1815 IdentifierInfo *Name, SourceLocation NameLoc, 1816 bool Invalid = false); 1817 1818 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1819 1820 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1821 Decl *Parm, Stmt *Body); 1822 1823 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1824 1825 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1826 MultiStmtArg Catch, Stmt *Finally); 1827 1828 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1829 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1830 Scope *CurScope); 1831 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1832 Expr *SynchExpr, 1833 Stmt *SynchBody); 1834 1835 VarDecl *BuildExceptionDeclaration(Scope *S, 1836 TypeSourceInfo *TInfo, 1837 IdentifierInfo *Name, 1838 SourceLocation Loc); 1839 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1840 1841 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1842 Decl *ExDecl, Stmt *HandlerBlock); 1843 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1844 MultiStmtArg Handlers); 1845 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1846 1847 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1848 1849 /// \brief If it's a file scoped decl that must warn if not used, keep track 1850 /// of it. 1851 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1852 1853 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1854 /// whose result is unused, warn. 1855 void DiagnoseUnusedExprResult(const Stmt *S); 1856 void DiagnoseUnusedDecl(const NamedDecl *ND); 1857 1858 ParsingDeclState PushParsingDeclaration() { 1859 return DelayedDiagnostics.pushParsingDecl(); 1860 } 1861 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 1862 DelayedDiagnostics::popParsingDecl(*this, state, decl); 1863 } 1864 1865 typedef ProcessingContextState ParsingClassState; 1866 ParsingClassState PushParsingClass() { 1867 return DelayedDiagnostics.pushContext(); 1868 } 1869 void PopParsingClass(ParsingClassState state) { 1870 DelayedDiagnostics.popContext(state); 1871 } 1872 1873 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1874 SourceLocation Loc, bool UnknownObjCClass=false); 1875 1876 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1877 1878 //===--------------------------------------------------------------------===// 1879 // Expression Parsing Callbacks: SemaExpr.cpp. 1880 1881 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1882 bool UnknownObjCClass=false); 1883 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1884 ObjCMethodDecl *Getter, 1885 SourceLocation Loc); 1886 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1887 Expr **Args, unsigned NumArgs); 1888 1889 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1890 1891 void PopExpressionEvaluationContext(); 1892 1893 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1894 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1895 void MarkDeclarationsReferencedInExpr(Expr *E); 1896 1897 /// \brief Conditionally issue a diagnostic based on the current 1898 /// evaluation context. 1899 /// 1900 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 1901 /// the function body is parsed, and then do a basic reachability analysis to 1902 /// determine if the statement is reachable. If it is unreachable, the 1903 /// diagnostic will not be emitted. 1904 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 1905 const PartialDiagnostic &PD); 1906 1907 // Primary Expressions. 1908 SourceRange getExprRange(Expr *E) const; 1909 1910 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1911 bool HasTrailingLParen, bool IsAddressOfOperand); 1912 1913 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1914 CorrectTypoContext CTC = CTC_Unknown); 1915 1916 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1917 bool AllowBuiltinCreation=false); 1918 1919 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1920 const DeclarationNameInfo &NameInfo, 1921 bool isAddressOfOperand, 1922 const TemplateArgumentListInfo *TemplateArgs); 1923 1924 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1925 ExprValueKind VK, 1926 SourceLocation Loc, 1927 const CXXScopeSpec *SS = 0); 1928 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1929 ExprValueKind VK, 1930 const DeclarationNameInfo &NameInfo, 1931 const CXXScopeSpec *SS = 0); 1932 ExprResult 1933 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 1934 SourceLocation nameLoc, 1935 IndirectFieldDecl *indirectField, 1936 Expr *baseObjectExpr = 0, 1937 SourceLocation opLoc = SourceLocation()); 1938 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1939 LookupResult &R, 1940 const TemplateArgumentListInfo *TemplateArgs); 1941 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1942 LookupResult &R, 1943 const TemplateArgumentListInfo *TemplateArgs, 1944 bool IsDefiniteInstance); 1945 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1946 const LookupResult &R, 1947 bool HasTrailingLParen); 1948 1949 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1950 const DeclarationNameInfo &NameInfo); 1951 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1952 const DeclarationNameInfo &NameInfo, 1953 const TemplateArgumentListInfo *TemplateArgs); 1954 1955 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1956 LookupResult &R, 1957 bool ADL); 1958 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1959 const DeclarationNameInfo &NameInfo, 1960 NamedDecl *D); 1961 1962 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 1963 ExprResult ActOnNumericConstant(const Token &); 1964 ExprResult ActOnCharacterConstant(const Token &); 1965 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 1966 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 1967 SourceLocation R, 1968 MultiExprArg Val, 1969 ParsedType TypeOfCast = ParsedType()); 1970 1971 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 1972 /// fragments (e.g. "foo" "bar" L"baz"). 1973 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 1974 1975 // Binary/Unary Operators. 'Tok' is the token for the operator. 1976 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 1977 Expr *InputArg); 1978 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 1979 UnaryOperatorKind Opc, Expr *input); 1980 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 1981 tok::TokenKind Op, Expr *Input); 1982 1983 ExprResult CreateSizeOfAlignOfExpr(TypeSourceInfo *T, 1984 SourceLocation OpLoc, 1985 bool isSizeOf, SourceRange R); 1986 ExprResult CreateSizeOfAlignOfExpr(Expr *E, SourceLocation OpLoc, 1987 bool isSizeOf, SourceRange R); 1988 ExprResult 1989 ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType, 1990 void *TyOrEx, const SourceRange &ArgRange); 1991 1992 ExprResult CheckPlaceholderExpr(Expr *E, SourceLocation Loc); 1993 1994 bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc, 1995 SourceRange R, bool isSizeof); 1996 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 1997 SourceLocation OpLoc, 1998 IdentifierInfo &Name, 1999 SourceLocation NameLoc, 2000 SourceLocation RParenLoc); 2001 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2002 tok::TokenKind Kind, Expr *Input); 2003 2004 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2005 Expr *Idx, SourceLocation RLoc); 2006 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2007 Expr *Idx, SourceLocation RLoc); 2008 2009 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2010 SourceLocation OpLoc, bool IsArrow, 2011 CXXScopeSpec &SS, 2012 NamedDecl *FirstQualifierInScope, 2013 const DeclarationNameInfo &NameInfo, 2014 const TemplateArgumentListInfo *TemplateArgs); 2015 2016 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2017 SourceLocation OpLoc, bool IsArrow, 2018 const CXXScopeSpec &SS, 2019 NamedDecl *FirstQualifierInScope, 2020 LookupResult &R, 2021 const TemplateArgumentListInfo *TemplateArgs, 2022 bool SuppressQualifierCheck = false); 2023 2024 ExprResult LookupMemberExpr(LookupResult &R, Expr *&Base, 2025 bool &IsArrow, SourceLocation OpLoc, 2026 CXXScopeSpec &SS, 2027 Decl *ObjCImpDecl, 2028 bool HasTemplateArgs); 2029 2030 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2031 const CXXScopeSpec &SS, 2032 const LookupResult &R); 2033 2034 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2035 bool IsArrow, SourceLocation OpLoc, 2036 const CXXScopeSpec &SS, 2037 NamedDecl *FirstQualifierInScope, 2038 const DeclarationNameInfo &NameInfo, 2039 const TemplateArgumentListInfo *TemplateArgs); 2040 2041 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2042 SourceLocation OpLoc, 2043 tok::TokenKind OpKind, 2044 CXXScopeSpec &SS, 2045 UnqualifiedId &Member, 2046 Decl *ObjCImpDecl, 2047 bool HasTrailingLParen); 2048 2049 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2050 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2051 FunctionDecl *FDecl, 2052 const FunctionProtoType *Proto, 2053 Expr **Args, unsigned NumArgs, 2054 SourceLocation RParenLoc); 2055 2056 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2057 /// This provides the location of the left/right parens and a list of comma 2058 /// locations. 2059 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2060 MultiExprArg Args, SourceLocation RParenLoc, 2061 Expr *ExecConfig = 0); 2062 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2063 SourceLocation LParenLoc, 2064 Expr **Args, unsigned NumArgs, 2065 SourceLocation RParenLoc, 2066 Expr *ExecConfig = 0); 2067 2068 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2069 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2070 2071 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2072 ParsedType Ty, SourceLocation RParenLoc, 2073 Expr *Op); 2074 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2075 TypeSourceInfo *Ty, 2076 SourceLocation RParenLoc, 2077 Expr *Op); 2078 2079 bool TypeIsVectorType(ParsedType Ty) { 2080 return GetTypeFromParser(Ty)->isVectorType(); 2081 } 2082 2083 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2084 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2085 SourceLocation RParenLoc, Expr *E, 2086 TypeSourceInfo *TInfo); 2087 2088 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2089 ParsedType Ty, 2090 SourceLocation RParenLoc, 2091 Expr *Op); 2092 2093 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2094 TypeSourceInfo *TInfo, 2095 SourceLocation RParenLoc, 2096 Expr *InitExpr); 2097 2098 ExprResult ActOnInitList(SourceLocation LParenLoc, 2099 MultiExprArg InitList, 2100 SourceLocation RParenLoc); 2101 2102 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2103 SourceLocation Loc, 2104 bool GNUSyntax, 2105 ExprResult Init); 2106 2107 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2108 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2109 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2110 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2111 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2112 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2113 2114 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2115 /// in the case of a the GNU conditional expr extension. 2116 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2117 SourceLocation ColonLoc, 2118 Expr *Cond, Expr *LHS, Expr *RHS); 2119 2120 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2121 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2122 LabelDecl *LD); 2123 2124 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2125 SourceLocation RPLoc); // "({..})" 2126 2127 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2128 struct OffsetOfComponent { 2129 SourceLocation LocStart, LocEnd; 2130 bool isBrackets; // true if [expr], false if .ident 2131 union { 2132 IdentifierInfo *IdentInfo; 2133 ExprTy *E; 2134 } U; 2135 }; 2136 2137 /// __builtin_offsetof(type, a.b[123][456].c) 2138 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2139 TypeSourceInfo *TInfo, 2140 OffsetOfComponent *CompPtr, 2141 unsigned NumComponents, 2142 SourceLocation RParenLoc); 2143 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2144 SourceLocation BuiltinLoc, 2145 SourceLocation TypeLoc, 2146 ParsedType Arg1, 2147 OffsetOfComponent *CompPtr, 2148 unsigned NumComponents, 2149 SourceLocation RParenLoc); 2150 2151 // __builtin_choose_expr(constExpr, expr1, expr2) 2152 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2153 Expr *cond, Expr *expr1, 2154 Expr *expr2, SourceLocation RPLoc); 2155 2156 // __builtin_va_arg(expr, type) 2157 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2158 Expr *expr, ParsedType type, 2159 SourceLocation RPLoc); 2160 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2161 Expr *expr, TypeSourceInfo *TInfo, 2162 SourceLocation RPLoc); 2163 2164 // __null 2165 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2166 2167 //===------------------------- "Block" Extension ------------------------===// 2168 2169 /// ActOnBlockStart - This callback is invoked when a block literal is 2170 /// started. 2171 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2172 2173 /// ActOnBlockArguments - This callback allows processing of block arguments. 2174 /// If there are no arguments, this is still invoked. 2175 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2176 2177 /// ActOnBlockError - If there is an error parsing a block, this callback 2178 /// is invoked to pop the information about the block from the action impl. 2179 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2180 2181 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2182 /// literal was successfully completed. ^(int x){...} 2183 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2184 Stmt *Body, Scope *CurScope); 2185 2186 //===---------------------------- C++ Features --------------------------===// 2187 2188 // Act on C++ namespaces 2189 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2190 SourceLocation IdentLoc, 2191 IdentifierInfo *Ident, 2192 SourceLocation LBrace, 2193 AttributeList *AttrList); 2194 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2195 2196 NamespaceDecl *getStdNamespace() const; 2197 NamespaceDecl *getOrCreateStdNamespace(); 2198 2199 CXXRecordDecl *getStdBadAlloc() const; 2200 2201 Decl *ActOnUsingDirective(Scope *CurScope, 2202 SourceLocation UsingLoc, 2203 SourceLocation NamespcLoc, 2204 CXXScopeSpec &SS, 2205 SourceLocation IdentLoc, 2206 IdentifierInfo *NamespcName, 2207 AttributeList *AttrList); 2208 2209 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2210 2211 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2212 SourceLocation NamespaceLoc, 2213 SourceLocation AliasLoc, 2214 IdentifierInfo *Alias, 2215 CXXScopeSpec &SS, 2216 SourceLocation IdentLoc, 2217 IdentifierInfo *Ident); 2218 2219 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2220 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2221 const LookupResult &PreviousDecls); 2222 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2223 NamedDecl *Target); 2224 2225 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2226 bool isTypeName, 2227 const CXXScopeSpec &SS, 2228 SourceLocation NameLoc, 2229 const LookupResult &Previous); 2230 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2231 const CXXScopeSpec &SS, 2232 SourceLocation NameLoc); 2233 2234 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2235 SourceLocation UsingLoc, 2236 CXXScopeSpec &SS, 2237 const DeclarationNameInfo &NameInfo, 2238 AttributeList *AttrList, 2239 bool IsInstantiation, 2240 bool IsTypeName, 2241 SourceLocation TypenameLoc); 2242 2243 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2244 2245 Decl *ActOnUsingDeclaration(Scope *CurScope, 2246 AccessSpecifier AS, 2247 bool HasUsingKeyword, 2248 SourceLocation UsingLoc, 2249 CXXScopeSpec &SS, 2250 UnqualifiedId &Name, 2251 AttributeList *AttrList, 2252 bool IsTypeName, 2253 SourceLocation TypenameLoc); 2254 2255 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2256 /// ActOnDeclarator, when a C++ direct initializer is present. 2257 /// e.g: "int x(1);" 2258 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2259 SourceLocation LParenLoc, 2260 MultiExprArg Exprs, 2261 SourceLocation RParenLoc, 2262 bool TypeMayContainAuto); 2263 2264 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2265 /// and sets it as the initializer for the the passed in VarDecl. 2266 bool InitializeVarWithConstructor(VarDecl *VD, 2267 CXXConstructorDecl *Constructor, 2268 MultiExprArg Exprs); 2269 2270 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2271 /// including handling of its default argument expressions. 2272 /// 2273 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2274 ExprResult 2275 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2276 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2277 bool RequiresZeroInit, unsigned ConstructKind, 2278 SourceRange ParenRange); 2279 2280 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2281 // the constructor can be elidable? 2282 ExprResult 2283 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2284 CXXConstructorDecl *Constructor, bool Elidable, 2285 MultiExprArg Exprs, bool RequiresZeroInit, 2286 unsigned ConstructKind, 2287 SourceRange ParenRange); 2288 2289 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2290 /// the default expr if needed. 2291 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2292 FunctionDecl *FD, 2293 ParmVarDecl *Param); 2294 2295 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2296 /// constructed variable. 2297 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2298 2299 /// \brief Declare the implicit default constructor for the given class. 2300 /// 2301 /// \param ClassDecl The class declaration into which the implicit 2302 /// default constructor will be added. 2303 /// 2304 /// \returns The implicitly-declared default constructor. 2305 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2306 CXXRecordDecl *ClassDecl); 2307 2308 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2309 /// defining this constructor as the default constructor. 2310 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2311 CXXConstructorDecl *Constructor); 2312 2313 /// \brief Declare the implicit destructor for the given class. 2314 /// 2315 /// \param ClassDecl The class declaration into which the implicit 2316 /// destructor will be added. 2317 /// 2318 /// \returns The implicitly-declared destructor. 2319 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2320 2321 /// DefineImplicitDestructor - Checks for feasibility of 2322 /// defining this destructor as the default destructor. 2323 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2324 CXXDestructorDecl *Destructor); 2325 2326 /// \brief Declare all inherited constructors for the given class. 2327 /// 2328 /// \param ClassDecl The class declaration into which the inherited 2329 /// constructors will be added. 2330 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2331 2332 /// \brief Declare the implicit copy constructor for the given class. 2333 /// 2334 /// \param S The scope of the class, which may be NULL if this is a 2335 /// template instantiation. 2336 /// 2337 /// \param ClassDecl The class declaration into which the implicit 2338 /// copy constructor will be added. 2339 /// 2340 /// \returns The implicitly-declared copy constructor. 2341 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2342 2343 /// DefineImplicitCopyConstructor - Checks for feasibility of 2344 /// defining this constructor as the copy constructor. 2345 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2346 CXXConstructorDecl *Constructor, 2347 unsigned TypeQuals); 2348 2349 /// \brief Declare the implicit copy assignment operator for the given class. 2350 /// 2351 /// \param S The scope of the class, which may be NULL if this is a 2352 /// template instantiation. 2353 /// 2354 /// \param ClassDecl The class declaration into which the implicit 2355 /// copy-assignment operator will be added. 2356 /// 2357 /// \returns The implicitly-declared copy assignment operator. 2358 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2359 2360 /// \brief Defined an implicitly-declared copy assignment operator. 2361 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2362 CXXMethodDecl *MethodDecl); 2363 2364 /// \brief Force the declaration of any implicitly-declared members of this 2365 /// class. 2366 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2367 2368 /// MaybeBindToTemporary - If the passed in expression has a record type with 2369 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2370 /// it simply returns the passed in expression. 2371 ExprResult MaybeBindToTemporary(Expr *E); 2372 2373 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2374 MultiExprArg ArgsPtr, 2375 SourceLocation Loc, 2376 ASTOwningVector<Expr*> &ConvertedArgs); 2377 2378 ParsedType getDestructorName(SourceLocation TildeLoc, 2379 IdentifierInfo &II, SourceLocation NameLoc, 2380 Scope *S, CXXScopeSpec &SS, 2381 ParsedType ObjectType, 2382 bool EnteringContext); 2383 2384 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2385 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2386 tok::TokenKind Kind, 2387 SourceLocation LAngleBracketLoc, 2388 ParsedType Ty, 2389 SourceLocation RAngleBracketLoc, 2390 SourceLocation LParenLoc, 2391 Expr *E, 2392 SourceLocation RParenLoc); 2393 2394 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2395 tok::TokenKind Kind, 2396 TypeSourceInfo *Ty, 2397 Expr *E, 2398 SourceRange AngleBrackets, 2399 SourceRange Parens); 2400 2401 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2402 SourceLocation TypeidLoc, 2403 TypeSourceInfo *Operand, 2404 SourceLocation RParenLoc); 2405 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2406 SourceLocation TypeidLoc, 2407 Expr *Operand, 2408 SourceLocation RParenLoc); 2409 2410 /// ActOnCXXTypeid - Parse typeid( something ). 2411 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2412 SourceLocation LParenLoc, bool isType, 2413 void *TyOrExpr, 2414 SourceLocation RParenLoc); 2415 2416 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2417 SourceLocation TypeidLoc, 2418 TypeSourceInfo *Operand, 2419 SourceLocation RParenLoc); 2420 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2421 SourceLocation TypeidLoc, 2422 Expr *Operand, 2423 SourceLocation RParenLoc); 2424 2425 /// ActOnCXXUuidof - Parse __uuidof( something ). 2426 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2427 SourceLocation LParenLoc, bool isType, 2428 void *TyOrExpr, 2429 SourceLocation RParenLoc); 2430 2431 2432 //// ActOnCXXThis - Parse 'this' pointer. 2433 ExprResult ActOnCXXThis(SourceLocation loc); 2434 2435 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2436 /// pointer to an instance method whose 'this' pointer is 2437 /// capturable, or null if this is not possible. 2438 CXXMethodDecl *tryCaptureCXXThis(); 2439 2440 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2441 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2442 2443 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2444 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2445 2446 //// ActOnCXXThrow - Parse throw expressions. 2447 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2448 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E); 2449 2450 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2451 /// Can be interpreted either as function-style casting ("int(x)") 2452 /// or class type construction ("ClassType(x,y,z)") 2453 /// or creation of a value-initialized type ("int()"). 2454 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2455 SourceLocation LParenLoc, 2456 MultiExprArg Exprs, 2457 SourceLocation RParenLoc); 2458 2459 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2460 SourceLocation LParenLoc, 2461 MultiExprArg Exprs, 2462 SourceLocation RParenLoc); 2463 2464 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2465 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2466 SourceLocation PlacementLParen, 2467 MultiExprArg PlacementArgs, 2468 SourceLocation PlacementRParen, 2469 SourceRange TypeIdParens, Declarator &D, 2470 SourceLocation ConstructorLParen, 2471 MultiExprArg ConstructorArgs, 2472 SourceLocation ConstructorRParen); 2473 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2474 SourceLocation PlacementLParen, 2475 MultiExprArg PlacementArgs, 2476 SourceLocation PlacementRParen, 2477 SourceRange TypeIdParens, 2478 QualType AllocType, 2479 TypeSourceInfo *AllocTypeInfo, 2480 Expr *ArraySize, 2481 SourceLocation ConstructorLParen, 2482 MultiExprArg ConstructorArgs, 2483 SourceLocation ConstructorRParen, 2484 bool TypeMayContainAuto = true); 2485 2486 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2487 SourceRange R); 2488 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2489 bool UseGlobal, QualType AllocType, bool IsArray, 2490 Expr **PlaceArgs, unsigned NumPlaceArgs, 2491 FunctionDecl *&OperatorNew, 2492 FunctionDecl *&OperatorDelete); 2493 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2494 DeclarationName Name, Expr** Args, 2495 unsigned NumArgs, DeclContext *Ctx, 2496 bool AllowMissing, FunctionDecl *&Operator); 2497 void DeclareGlobalNewDelete(); 2498 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2499 QualType Argument, 2500 bool addMallocAttr = false); 2501 2502 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2503 DeclarationName Name, FunctionDecl* &Operator); 2504 2505 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2506 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2507 bool UseGlobal, bool ArrayForm, 2508 Expr *Operand); 2509 2510 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2511 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2512 SourceLocation StmtLoc, 2513 bool ConvertToBoolean); 2514 2515 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2516 Expr *Operand, SourceLocation RParen); 2517 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2518 SourceLocation RParen); 2519 2520 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2521 /// pseudo-functions. 2522 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2523 SourceLocation KWLoc, 2524 ParsedType Ty, 2525 SourceLocation RParen); 2526 2527 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2528 SourceLocation KWLoc, 2529 TypeSourceInfo *T, 2530 SourceLocation RParen); 2531 2532 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2533 /// pseudo-functions. 2534 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2535 SourceLocation KWLoc, 2536 ParsedType LhsTy, 2537 ParsedType RhsTy, 2538 SourceLocation RParen); 2539 2540 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2541 SourceLocation KWLoc, 2542 TypeSourceInfo *LhsT, 2543 TypeSourceInfo *RhsT, 2544 SourceLocation RParen); 2545 2546 ExprResult ActOnStartCXXMemberReference(Scope *S, 2547 Expr *Base, 2548 SourceLocation OpLoc, 2549 tok::TokenKind OpKind, 2550 ParsedType &ObjectType, 2551 bool &MayBePseudoDestructor); 2552 2553 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2554 2555 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2556 SourceLocation OpLoc, 2557 tok::TokenKind OpKind, 2558 const CXXScopeSpec &SS, 2559 TypeSourceInfo *ScopeType, 2560 SourceLocation CCLoc, 2561 SourceLocation TildeLoc, 2562 PseudoDestructorTypeStorage DestroyedType, 2563 bool HasTrailingLParen); 2564 2565 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2566 SourceLocation OpLoc, 2567 tok::TokenKind OpKind, 2568 CXXScopeSpec &SS, 2569 UnqualifiedId &FirstTypeName, 2570 SourceLocation CCLoc, 2571 SourceLocation TildeLoc, 2572 UnqualifiedId &SecondTypeName, 2573 bool HasTrailingLParen); 2574 2575 /// MaybeCreateExprWithCleanups - If the current full-expression 2576 /// requires any cleanups, surround it with a ExprWithCleanups node. 2577 /// Otherwise, just returns the passed-in expression. 2578 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2579 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2580 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2581 2582 ExprResult ActOnFinishFullExpr(Expr *Expr); 2583 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2584 2585 // Marks SS invalid if it represents an incomplete type. 2586 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2587 2588 DeclContext *computeDeclContext(QualType T); 2589 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2590 bool EnteringContext = false); 2591 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2592 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2593 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2594 2595 /// \brief The parser has parsed a global nested-name-specifier '::'. 2596 /// 2597 /// \param S The scope in which this nested-name-specifier occurs. 2598 /// 2599 /// \param CCLoc The location of the '::'. 2600 /// 2601 /// \param SS The nested-name-specifier, which will be updated in-place 2602 /// to reflect the parsed nested-name-specifier. 2603 /// 2604 /// \returns true if an error occurred, false otherwise. 2605 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2606 CXXScopeSpec &SS); 2607 2608 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2609 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2610 2611 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2612 SourceLocation IdLoc, 2613 IdentifierInfo &II, 2614 ParsedType ObjectType); 2615 2616 bool BuildCXXNestedNameSpecifier(Scope *S, 2617 IdentifierInfo &Identifier, 2618 SourceLocation IdentifierLoc, 2619 SourceLocation CCLoc, 2620 QualType ObjectType, 2621 bool EnteringContext, 2622 CXXScopeSpec &SS, 2623 NamedDecl *ScopeLookupResult, 2624 bool ErrorRecoveryLookup); 2625 2626 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2627 /// 2628 /// \param S The scope in which this nested-name-specifier occurs. 2629 /// 2630 /// \param Identifier The identifier preceding the '::'. 2631 /// 2632 /// \param IdentifierLoc The location of the identifier. 2633 /// 2634 /// \param CCLoc The location of the '::'. 2635 /// 2636 /// \param ObjectType The type of the object, if we're parsing 2637 /// nested-name-specifier in a member access expression. 2638 /// 2639 /// \param EnteringContext Whether we're entering the context nominated by 2640 /// this nested-name-specifier. 2641 /// 2642 /// \param SS The nested-name-specifier, which is both an input 2643 /// parameter (the nested-name-specifier before this type) and an 2644 /// output parameter (containing the full nested-name-specifier, 2645 /// including this new type). 2646 /// 2647 /// \returns true if an error occurred, false otherwise. 2648 bool ActOnCXXNestedNameSpecifier(Scope *S, 2649 IdentifierInfo &Identifier, 2650 SourceLocation IdentifierLoc, 2651 SourceLocation CCLoc, 2652 ParsedType ObjectType, 2653 bool EnteringContext, 2654 CXXScopeSpec &SS); 2655 2656 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2657 IdentifierInfo &Identifier, 2658 SourceLocation IdentifierLoc, 2659 SourceLocation ColonLoc, 2660 ParsedType ObjectType, 2661 bool EnteringContext); 2662 2663 /// \brief The parser has parsed a nested-name-specifier 2664 /// 'template[opt] template-name < template-args >::'. 2665 /// 2666 /// \param S The scope in which this nested-name-specifier occurs. 2667 /// 2668 /// \param TemplateLoc The location of the 'template' keyword, if any. 2669 /// 2670 /// \param SS The nested-name-specifier, which is both an input 2671 /// parameter (the nested-name-specifier before this type) and an 2672 /// output parameter (containing the full nested-name-specifier, 2673 /// including this new type). 2674 /// 2675 /// \param TemplateLoc the location of the 'template' keyword, if any. 2676 /// \param TemplateName The template name. 2677 /// \param TemplateNameLoc The location of the template name. 2678 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2679 /// \param TemplateArgs The template arguments. 2680 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2681 /// \param CCLoc The location of the '::'. 2682 2683 /// \param EnteringContext Whether we're entering the context of the 2684 /// nested-name-specifier. 2685 /// 2686 /// 2687 /// \returns true if an error occurred, false otherwise. 2688 bool ActOnCXXNestedNameSpecifier(Scope *S, 2689 SourceLocation TemplateLoc, 2690 CXXScopeSpec &SS, 2691 TemplateTy Template, 2692 SourceLocation TemplateNameLoc, 2693 SourceLocation LAngleLoc, 2694 ASTTemplateArgsPtr TemplateArgs, 2695 SourceLocation RAngleLoc, 2696 SourceLocation CCLoc, 2697 bool EnteringContext); 2698 2699 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2700 /// that the parser can use later to reconstruct the given 2701 /// nested-name-specifier. 2702 /// 2703 /// \param SS A nested-name-specifier. 2704 /// 2705 /// \returns A pointer containing all of the information in the 2706 /// nested-name-specifier \p SS. 2707 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2708 2709 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2710 /// the nested-name-specifier structure. 2711 /// 2712 /// \param Annotation The annotation pointer, produced by 2713 /// \c SaveNestedNameSpecifierAnnotation(). 2714 /// 2715 /// \param AnnotationRange The source range corresponding to the annotation. 2716 /// 2717 /// \param SS The nested-name-specifier that will be updated with the contents 2718 /// of the annotation pointer. 2719 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2720 SourceRange AnnotationRange, 2721 CXXScopeSpec &SS); 2722 2723 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2724 2725 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2726 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2727 /// After this method is called, according to [C++ 3.4.3p3], names should be 2728 /// looked up in the declarator-id's scope, until the declarator is parsed and 2729 /// ActOnCXXExitDeclaratorScope is called. 2730 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2731 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2732 2733 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2734 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2735 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2736 /// Used to indicate that names should revert to being looked up in the 2737 /// defining scope. 2738 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2739 2740 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2741 /// initializer for the declaration 'Dcl'. 2742 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2743 /// static data member of class X, names should be looked up in the scope of 2744 /// class X. 2745 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2746 2747 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2748 /// initializer for the declaration 'Dcl'. 2749 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2750 2751 // ParseObjCStringLiteral - Parse Objective-C string literals. 2752 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2753 Expr **Strings, 2754 unsigned NumStrings); 2755 2756 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2757 TypeSourceInfo *EncodedTypeInfo, 2758 SourceLocation RParenLoc); 2759 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2760 CXXMethodDecl *Method); 2761 2762 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2763 SourceLocation EncodeLoc, 2764 SourceLocation LParenLoc, 2765 ParsedType Ty, 2766 SourceLocation RParenLoc); 2767 2768 // ParseObjCSelectorExpression - Build selector expression for @selector 2769 ExprResult ParseObjCSelectorExpression(Selector Sel, 2770 SourceLocation AtLoc, 2771 SourceLocation SelLoc, 2772 SourceLocation LParenLoc, 2773 SourceLocation RParenLoc); 2774 2775 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2776 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2777 SourceLocation AtLoc, 2778 SourceLocation ProtoLoc, 2779 SourceLocation LParenLoc, 2780 SourceLocation RParenLoc); 2781 2782 //===--------------------------------------------------------------------===// 2783 // C++ Declarations 2784 // 2785 Decl *ActOnStartLinkageSpecification(Scope *S, 2786 SourceLocation ExternLoc, 2787 SourceLocation LangLoc, 2788 llvm::StringRef Lang, 2789 SourceLocation LBraceLoc); 2790 Decl *ActOnFinishLinkageSpecification(Scope *S, 2791 Decl *LinkageSpec, 2792 SourceLocation RBraceLoc); 2793 2794 2795 //===--------------------------------------------------------------------===// 2796 // C++ Classes 2797 // 2798 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2799 const CXXScopeSpec *SS = 0); 2800 2801 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2802 SourceLocation ASLoc, 2803 SourceLocation ColonLoc); 2804 2805 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2806 Declarator &D, 2807 MultiTemplateParamsArg TemplateParameterLists, 2808 Expr *BitfieldWidth, const VirtSpecifiers &VS, 2809 Expr *Init, bool IsDefinition, 2810 bool Deleted = false); 2811 2812 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2813 Scope *S, 2814 CXXScopeSpec &SS, 2815 IdentifierInfo *MemberOrBase, 2816 ParsedType TemplateTypeTy, 2817 SourceLocation IdLoc, 2818 SourceLocation LParenLoc, 2819 Expr **Args, unsigned NumArgs, 2820 SourceLocation RParenLoc, 2821 SourceLocation EllipsisLoc); 2822 2823 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2824 unsigned NumArgs, SourceLocation IdLoc, 2825 SourceLocation LParenLoc, 2826 SourceLocation RParenLoc); 2827 2828 MemInitResult BuildBaseInitializer(QualType BaseType, 2829 TypeSourceInfo *BaseTInfo, 2830 Expr **Args, unsigned NumArgs, 2831 SourceLocation LParenLoc, 2832 SourceLocation RParenLoc, 2833 CXXRecordDecl *ClassDecl, 2834 SourceLocation EllipsisLoc); 2835 2836 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 2837 Expr **Args, unsigned NumArgs, 2838 SourceLocation BaseLoc, 2839 SourceLocation RParenLoc, 2840 SourceLocation LParenLoc, 2841 CXXRecordDecl *ClassDecl); 2842 2843 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 2844 CXXCtorInitializer **Initializers, 2845 unsigned NumInitializers, bool AnyErrors); 2846 2847 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2848 2849 2850 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2851 /// mark all the non-trivial destructors of its members and bases as 2852 /// referenced. 2853 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2854 CXXRecordDecl *Record); 2855 2856 /// \brief The list of classes whose vtables have been used within 2857 /// this translation unit, and the source locations at which the 2858 /// first use occurred. 2859 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2860 2861 /// \brief The list of vtables that are required but have not yet been 2862 /// materialized. 2863 llvm::SmallVector<VTableUse, 16> VTableUses; 2864 2865 /// \brief The set of classes whose vtables have been used within 2866 /// this translation unit, and a bit that will be true if the vtable is 2867 /// required to be emitted (otherwise, it should be emitted only if needed 2868 /// by code generation). 2869 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2870 2871 /// \brief A list of all of the dynamic classes in this translation 2872 /// unit. 2873 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2874 2875 /// \brief Note that the vtable for the given class was used at the 2876 /// given location. 2877 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2878 bool DefinitionRequired = false); 2879 2880 /// MarkVirtualMembersReferenced - Will mark all members of the given 2881 /// CXXRecordDecl referenced. 2882 void MarkVirtualMembersReferenced(SourceLocation Loc, 2883 const CXXRecordDecl *RD); 2884 2885 /// \brief Define all of the vtables that have been used in this 2886 /// translation unit and reference any virtual members used by those 2887 /// vtables. 2888 /// 2889 /// \returns true if any work was done, false otherwise. 2890 bool DefineUsedVTables(); 2891 2892 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2893 2894 void ActOnMemInitializers(Decl *ConstructorDecl, 2895 SourceLocation ColonLoc, 2896 MemInitTy **MemInits, unsigned NumMemInits, 2897 bool AnyErrors); 2898 2899 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2900 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2901 Decl *TagDecl, 2902 SourceLocation LBrac, 2903 SourceLocation RBrac, 2904 AttributeList *AttrList); 2905 2906 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2907 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2908 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2909 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2910 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2911 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2912 2913 Decl *ActOnStaticAssertDeclaration(SourceLocation AssertLoc, 2914 Expr *AssertExpr, 2915 Expr *AssertMessageExpr); 2916 2917 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2918 TypeSourceInfo *TSInfo); 2919 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2920 MultiTemplateParamsArg TemplateParams); 2921 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2922 MultiTemplateParamsArg TemplateParams); 2923 2924 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2925 StorageClass& SC); 2926 void CheckConstructor(CXXConstructorDecl *Constructor); 2927 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2928 StorageClass& SC); 2929 bool CheckDestructor(CXXDestructorDecl *Destructor); 2930 void CheckConversionDeclarator(Declarator &D, QualType &R, 2931 StorageClass& SC); 2932 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2933 2934 //===--------------------------------------------------------------------===// 2935 // C++ Derived Classes 2936 // 2937 2938 /// ActOnBaseSpecifier - Parsed a base specifier 2939 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2940 SourceRange SpecifierRange, 2941 bool Virtual, AccessSpecifier Access, 2942 TypeSourceInfo *TInfo, 2943 SourceLocation EllipsisLoc); 2944 2945 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2946 SourceRange SpecifierRange, 2947 bool Virtual, AccessSpecifier Access, 2948 ParsedType basetype, 2949 SourceLocation BaseLoc, 2950 SourceLocation EllipsisLoc); 2951 2952 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2953 unsigned NumBases); 2954 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 2955 2956 bool IsDerivedFrom(QualType Derived, QualType Base); 2957 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 2958 2959 // FIXME: I don't like this name. 2960 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 2961 2962 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 2963 2964 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2965 SourceLocation Loc, SourceRange Range, 2966 CXXCastPath *BasePath = 0, 2967 bool IgnoreAccess = false); 2968 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2969 unsigned InaccessibleBaseID, 2970 unsigned AmbigiousBaseConvID, 2971 SourceLocation Loc, SourceRange Range, 2972 DeclarationName Name, 2973 CXXCastPath *BasePath); 2974 2975 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 2976 2977 /// CheckOverridingFunctionReturnType - Checks whether the return types are 2978 /// covariant, according to C++ [class.virtual]p5. 2979 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 2980 const CXXMethodDecl *Old); 2981 2982 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 2983 /// spec is a subset of base spec. 2984 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 2985 const CXXMethodDecl *Old); 2986 2987 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 2988 2989 /// CheckOverrideControl - Check C++0x override control semantics. 2990 void CheckOverrideControl(const Decl *D); 2991 2992 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 2993 /// overrides a virtual member function marked 'final', according to 2994 /// C++0x [class.virtual]p3. 2995 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 2996 const CXXMethodDecl *Old); 2997 2998 2999 //===--------------------------------------------------------------------===// 3000 // C++ Access Control 3001 // 3002 3003 enum AccessResult { 3004 AR_accessible, 3005 AR_inaccessible, 3006 AR_dependent, 3007 AR_delayed 3008 }; 3009 3010 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3011 NamedDecl *PrevMemberDecl, 3012 AccessSpecifier LexicalAS); 3013 3014 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3015 DeclAccessPair FoundDecl); 3016 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3017 DeclAccessPair FoundDecl); 3018 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3019 SourceRange PlacementRange, 3020 CXXRecordDecl *NamingClass, 3021 DeclAccessPair FoundDecl); 3022 AccessResult CheckConstructorAccess(SourceLocation Loc, 3023 CXXConstructorDecl *D, 3024 const InitializedEntity &Entity, 3025 AccessSpecifier Access, 3026 bool IsCopyBindingRefToTemp = false); 3027 AccessResult CheckDestructorAccess(SourceLocation Loc, 3028 CXXDestructorDecl *Dtor, 3029 const PartialDiagnostic &PDiag); 3030 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3031 NamedDecl *D, 3032 const PartialDiagnostic &PDiag); 3033 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3034 Expr *ObjectExpr, 3035 Expr *ArgExpr, 3036 DeclAccessPair FoundDecl); 3037 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3038 DeclAccessPair FoundDecl); 3039 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3040 QualType Base, QualType Derived, 3041 const CXXBasePath &Path, 3042 unsigned DiagID, 3043 bool ForceCheck = false, 3044 bool ForceUnprivileged = false); 3045 void CheckLookupAccess(const LookupResult &R); 3046 3047 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3048 const MultiLevelTemplateArgumentList &TemplateArgs); 3049 void PerformDependentDiagnostics(const DeclContext *Pattern, 3050 const MultiLevelTemplateArgumentList &TemplateArgs); 3051 3052 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3053 3054 /// A flag to suppress access checking. 3055 bool SuppressAccessChecking; 3056 3057 /// \brief When true, access checking violations are treated as SFINAE 3058 /// failures rather than hard errors. 3059 bool AccessCheckingSFINAE; 3060 3061 void ActOnStartSuppressingAccessChecks(); 3062 void ActOnStopSuppressingAccessChecks(); 3063 3064 enum AbstractDiagSelID { 3065 AbstractNone = -1, 3066 AbstractReturnType, 3067 AbstractParamType, 3068 AbstractVariableType, 3069 AbstractFieldType, 3070 AbstractArrayType 3071 }; 3072 3073 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3074 const PartialDiagnostic &PD); 3075 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3076 3077 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3078 AbstractDiagSelID SelID = AbstractNone); 3079 3080 //===--------------------------------------------------------------------===// 3081 // C++ Overloaded Operators [C++ 13.5] 3082 // 3083 3084 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3085 3086 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3087 3088 //===--------------------------------------------------------------------===// 3089 // C++ Templates [C++ 14] 3090 // 3091 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3092 QualType ObjectType, bool EnteringContext, 3093 bool &MemberOfUnknownSpecialization); 3094 3095 TemplateNameKind isTemplateName(Scope *S, 3096 CXXScopeSpec &SS, 3097 bool hasTemplateKeyword, 3098 UnqualifiedId &Name, 3099 ParsedType ObjectType, 3100 bool EnteringContext, 3101 TemplateTy &Template, 3102 bool &MemberOfUnknownSpecialization); 3103 3104 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3105 SourceLocation IILoc, 3106 Scope *S, 3107 const CXXScopeSpec *SS, 3108 TemplateTy &SuggestedTemplate, 3109 TemplateNameKind &SuggestedKind); 3110 3111 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3112 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3113 3114 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3115 SourceLocation EllipsisLoc, 3116 SourceLocation KeyLoc, 3117 IdentifierInfo *ParamName, 3118 SourceLocation ParamNameLoc, 3119 unsigned Depth, unsigned Position, 3120 SourceLocation EqualLoc, 3121 ParsedType DefaultArg); 3122 3123 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3124 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3125 unsigned Depth, 3126 unsigned Position, 3127 SourceLocation EqualLoc, 3128 Expr *DefaultArg); 3129 Decl *ActOnTemplateTemplateParameter(Scope *S, 3130 SourceLocation TmpLoc, 3131 TemplateParamsTy *Params, 3132 SourceLocation EllipsisLoc, 3133 IdentifierInfo *ParamName, 3134 SourceLocation ParamNameLoc, 3135 unsigned Depth, 3136 unsigned Position, 3137 SourceLocation EqualLoc, 3138 ParsedTemplateArgument DefaultArg); 3139 3140 TemplateParamsTy * 3141 ActOnTemplateParameterList(unsigned Depth, 3142 SourceLocation ExportLoc, 3143 SourceLocation TemplateLoc, 3144 SourceLocation LAngleLoc, 3145 Decl **Params, unsigned NumParams, 3146 SourceLocation RAngleLoc); 3147 3148 /// \brief The context in which we are checking a template parameter 3149 /// list. 3150 enum TemplateParamListContext { 3151 TPC_ClassTemplate, 3152 TPC_FunctionTemplate, 3153 TPC_ClassTemplateMember, 3154 TPC_FriendFunctionTemplate, 3155 TPC_FriendFunctionTemplateDefinition 3156 }; 3157 3158 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3159 TemplateParameterList *OldParams, 3160 TemplateParamListContext TPC); 3161 TemplateParameterList * 3162 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3163 const CXXScopeSpec &SS, 3164 TemplateParameterList **ParamLists, 3165 unsigned NumParamLists, 3166 bool IsFriend, 3167 bool &IsExplicitSpecialization, 3168 bool &Invalid); 3169 3170 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3171 SourceLocation KWLoc, CXXScopeSpec &SS, 3172 IdentifierInfo *Name, SourceLocation NameLoc, 3173 AttributeList *Attr, 3174 TemplateParameterList *TemplateParams, 3175 AccessSpecifier AS); 3176 3177 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3178 TemplateArgumentListInfo &Out); 3179 3180 QualType CheckTemplateIdType(TemplateName Template, 3181 SourceLocation TemplateLoc, 3182 const TemplateArgumentListInfo &TemplateArgs); 3183 3184 TypeResult 3185 ActOnTemplateIdType(TemplateTy Template, SourceLocation TemplateLoc, 3186 SourceLocation LAngleLoc, 3187 ASTTemplateArgsPtr TemplateArgs, 3188 SourceLocation RAngleLoc); 3189 3190 TypeResult ActOnTagTemplateIdType(CXXScopeSpec &SS, 3191 TypeResult Type, 3192 TagUseKind TUK, 3193 TypeSpecifierType TagSpec, 3194 SourceLocation TagLoc); 3195 3196 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3197 LookupResult &R, 3198 bool RequiresADL, 3199 const TemplateArgumentListInfo &TemplateArgs); 3200 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3201 const DeclarationNameInfo &NameInfo, 3202 const TemplateArgumentListInfo &TemplateArgs); 3203 3204 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3205 SourceLocation TemplateKWLoc, 3206 CXXScopeSpec &SS, 3207 UnqualifiedId &Name, 3208 ParsedType ObjectType, 3209 bool EnteringContext, 3210 TemplateTy &Template); 3211 3212 DeclResult 3213 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3214 SourceLocation KWLoc, 3215 CXXScopeSpec &SS, 3216 TemplateTy Template, 3217 SourceLocation TemplateNameLoc, 3218 SourceLocation LAngleLoc, 3219 ASTTemplateArgsPtr TemplateArgs, 3220 SourceLocation RAngleLoc, 3221 AttributeList *Attr, 3222 MultiTemplateParamsArg TemplateParameterLists); 3223 3224 Decl *ActOnTemplateDeclarator(Scope *S, 3225 MultiTemplateParamsArg TemplateParameterLists, 3226 Declarator &D); 3227 3228 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3229 MultiTemplateParamsArg TemplateParameterLists, 3230 Declarator &D); 3231 3232 bool 3233 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3234 TemplateSpecializationKind NewTSK, 3235 NamedDecl *PrevDecl, 3236 TemplateSpecializationKind PrevTSK, 3237 SourceLocation PrevPtOfInstantiation, 3238 bool &SuppressNew); 3239 3240 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3241 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3242 LookupResult &Previous); 3243 3244 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3245 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3246 LookupResult &Previous); 3247 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3248 3249 DeclResult 3250 ActOnExplicitInstantiation(Scope *S, 3251 SourceLocation ExternLoc, 3252 SourceLocation TemplateLoc, 3253 unsigned TagSpec, 3254 SourceLocation KWLoc, 3255 const CXXScopeSpec &SS, 3256 TemplateTy Template, 3257 SourceLocation TemplateNameLoc, 3258 SourceLocation LAngleLoc, 3259 ASTTemplateArgsPtr TemplateArgs, 3260 SourceLocation RAngleLoc, 3261 AttributeList *Attr); 3262 3263 DeclResult 3264 ActOnExplicitInstantiation(Scope *S, 3265 SourceLocation ExternLoc, 3266 SourceLocation TemplateLoc, 3267 unsigned TagSpec, 3268 SourceLocation KWLoc, 3269 CXXScopeSpec &SS, 3270 IdentifierInfo *Name, 3271 SourceLocation NameLoc, 3272 AttributeList *Attr); 3273 3274 DeclResult ActOnExplicitInstantiation(Scope *S, 3275 SourceLocation ExternLoc, 3276 SourceLocation TemplateLoc, 3277 Declarator &D); 3278 3279 TemplateArgumentLoc 3280 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3281 SourceLocation TemplateLoc, 3282 SourceLocation RAngleLoc, 3283 Decl *Param, 3284 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3285 3286 /// \brief Specifies the context in which a particular template 3287 /// argument is being checked. 3288 enum CheckTemplateArgumentKind { 3289 /// \brief The template argument was specified in the code or was 3290 /// instantiated with some deduced template arguments. 3291 CTAK_Specified, 3292 3293 /// \brief The template argument was deduced via template argument 3294 /// deduction. 3295 CTAK_Deduced, 3296 3297 /// \brief The template argument was deduced from an array bound 3298 /// via template argument deduction. 3299 CTAK_DeducedFromArrayBound 3300 }; 3301 3302 bool CheckTemplateArgument(NamedDecl *Param, 3303 const TemplateArgumentLoc &Arg, 3304 NamedDecl *Template, 3305 SourceLocation TemplateLoc, 3306 SourceLocation RAngleLoc, 3307 unsigned ArgumentPackIndex, 3308 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3309 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3310 3311 bool CheckTemplateArgumentList(TemplateDecl *Template, 3312 SourceLocation TemplateLoc, 3313 const TemplateArgumentListInfo &TemplateArgs, 3314 bool PartialTemplateArgs, 3315 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3316 3317 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3318 const TemplateArgumentLoc &Arg, 3319 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3320 3321 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3322 TypeSourceInfo *Arg); 3323 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3324 TemplateArgument &Converted); 3325 bool CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3326 QualType InstantiatedParamType, Expr *&Arg, 3327 TemplateArgument &Converted, 3328 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3329 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3330 const TemplateArgumentLoc &Arg); 3331 3332 ExprResult 3333 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3334 QualType ParamType, 3335 SourceLocation Loc); 3336 ExprResult 3337 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3338 SourceLocation Loc); 3339 3340 /// \brief Enumeration describing how template parameter lists are compared 3341 /// for equality. 3342 enum TemplateParameterListEqualKind { 3343 /// \brief We are matching the template parameter lists of two templates 3344 /// that might be redeclarations. 3345 /// 3346 /// \code 3347 /// template<typename T> struct X; 3348 /// template<typename T> struct X; 3349 /// \endcode 3350 TPL_TemplateMatch, 3351 3352 /// \brief We are matching the template parameter lists of two template 3353 /// template parameters as part of matching the template parameter lists 3354 /// of two templates that might be redeclarations. 3355 /// 3356 /// \code 3357 /// template<template<int I> class TT> struct X; 3358 /// template<template<int Value> class Other> struct X; 3359 /// \endcode 3360 TPL_TemplateTemplateParmMatch, 3361 3362 /// \brief We are matching the template parameter lists of a template 3363 /// template argument against the template parameter lists of a template 3364 /// template parameter. 3365 /// 3366 /// \code 3367 /// template<template<int Value> class Metafun> struct X; 3368 /// template<int Value> struct integer_c; 3369 /// X<integer_c> xic; 3370 /// \endcode 3371 TPL_TemplateTemplateArgumentMatch 3372 }; 3373 3374 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3375 TemplateParameterList *Old, 3376 bool Complain, 3377 TemplateParameterListEqualKind Kind, 3378 SourceLocation TemplateArgLoc 3379 = SourceLocation()); 3380 3381 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3382 3383 /// \brief Called when the parser has parsed a C++ typename 3384 /// specifier, e.g., "typename T::type". 3385 /// 3386 /// \param S The scope in which this typename type occurs. 3387 /// \param TypenameLoc the location of the 'typename' keyword 3388 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3389 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3390 /// \param IdLoc the location of the identifier. 3391 TypeResult 3392 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3393 const CXXScopeSpec &SS, const IdentifierInfo &II, 3394 SourceLocation IdLoc); 3395 3396 /// \brief Called when the parser has parsed a C++ typename 3397 /// specifier that ends in a template-id, e.g., 3398 /// "typename MetaFun::template apply<T1, T2>". 3399 /// 3400 /// \param S The scope in which this typename type occurs. 3401 /// \param TypenameLoc the location of the 'typename' keyword 3402 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3403 /// \param TemplateLoc the location of the 'template' keyword, if any. 3404 /// \param TemplateName The template name. 3405 /// \param TemplateNameLoc The location of the template name. 3406 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3407 /// \param TemplateArgs The template arguments. 3408 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3409 TypeResult 3410 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3411 const CXXScopeSpec &SS, 3412 SourceLocation TemplateLoc, 3413 TemplateTy Template, 3414 SourceLocation TemplateNameLoc, 3415 SourceLocation LAngleLoc, 3416 ASTTemplateArgsPtr TemplateArgs, 3417 SourceLocation RAngleLoc); 3418 3419 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3420 SourceLocation KeywordLoc, 3421 NestedNameSpecifierLoc QualifierLoc, 3422 const IdentifierInfo &II, 3423 SourceLocation IILoc); 3424 3425 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3426 SourceLocation Loc, 3427 DeclarationName Name); 3428 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3429 3430 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3431 3432 std::string 3433 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3434 const TemplateArgumentList &Args); 3435 3436 std::string 3437 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3438 const TemplateArgument *Args, 3439 unsigned NumArgs); 3440 3441 //===--------------------------------------------------------------------===// 3442 // C++ Variadic Templates (C++0x [temp.variadic]) 3443 //===--------------------------------------------------------------------===// 3444 3445 /// \brief The context in which an unexpanded parameter pack is 3446 /// being diagnosed. 3447 /// 3448 /// Note that the values of this enumeration line up with the first 3449 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3450 enum UnexpandedParameterPackContext { 3451 /// \brief An arbitrary expression. 3452 UPPC_Expression = 0, 3453 3454 /// \brief The base type of a class type. 3455 UPPC_BaseType, 3456 3457 /// \brief The type of an arbitrary declaration. 3458 UPPC_DeclarationType, 3459 3460 /// \brief The type of a data member. 3461 UPPC_DataMemberType, 3462 3463 /// \brief The size of a bit-field. 3464 UPPC_BitFieldWidth, 3465 3466 /// \brief The expression in a static assertion. 3467 UPPC_StaticAssertExpression, 3468 3469 /// \brief The fixed underlying type of an enumeration. 3470 UPPC_FixedUnderlyingType, 3471 3472 /// \brief The enumerator value. 3473 UPPC_EnumeratorValue, 3474 3475 /// \brief A using declaration. 3476 UPPC_UsingDeclaration, 3477 3478 /// \brief A friend declaration. 3479 UPPC_FriendDeclaration, 3480 3481 /// \brief A declaration qualifier. 3482 UPPC_DeclarationQualifier, 3483 3484 /// \brief An initializer. 3485 UPPC_Initializer, 3486 3487 /// \brief A default argument. 3488 UPPC_DefaultArgument, 3489 3490 /// \brief The type of a non-type template parameter. 3491 UPPC_NonTypeTemplateParameterType, 3492 3493 /// \brief The type of an exception. 3494 UPPC_ExceptionType, 3495 3496 /// \brief Partial specialization. 3497 UPPC_PartialSpecialization 3498 }; 3499 3500 /// \brief If the given type contains an unexpanded parameter pack, 3501 /// diagnose the error. 3502 /// 3503 /// \param Loc The source location where a diagnostc should be emitted. 3504 /// 3505 /// \param T The type that is being checked for unexpanded parameter 3506 /// packs. 3507 /// 3508 /// \returns true if an error ocurred, false otherwise. 3509 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3510 UnexpandedParameterPackContext UPPC); 3511 3512 /// \brief If the given expression contains an unexpanded parameter 3513 /// pack, diagnose the error. 3514 /// 3515 /// \param E The expression that is being checked for unexpanded 3516 /// parameter packs. 3517 /// 3518 /// \returns true if an error ocurred, false otherwise. 3519 bool DiagnoseUnexpandedParameterPack(Expr *E, 3520 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3521 3522 /// \brief If the given nested-name-specifier contains an unexpanded 3523 /// parameter pack, diagnose the error. 3524 /// 3525 /// \param SS The nested-name-specifier that is being checked for 3526 /// unexpanded parameter packs. 3527 /// 3528 /// \returns true if an error ocurred, false otherwise. 3529 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3530 UnexpandedParameterPackContext UPPC); 3531 3532 /// \brief If the given name contains an unexpanded parameter pack, 3533 /// diagnose the error. 3534 /// 3535 /// \param NameInfo The name (with source location information) that 3536 /// is being checked for unexpanded parameter packs. 3537 /// 3538 /// \returns true if an error ocurred, false otherwise. 3539 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3540 UnexpandedParameterPackContext UPPC); 3541 3542 /// \brief If the given template name contains an unexpanded parameter pack, 3543 /// diagnose the error. 3544 /// 3545 /// \param Loc The location of the template name. 3546 /// 3547 /// \param Template The template name that is being checked for unexpanded 3548 /// parameter packs. 3549 /// 3550 /// \returns true if an error ocurred, false otherwise. 3551 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3552 TemplateName Template, 3553 UnexpandedParameterPackContext UPPC); 3554 3555 /// \brief If the given template argument contains an unexpanded parameter 3556 /// pack, diagnose the error. 3557 /// 3558 /// \param Arg The template argument that is being checked for unexpanded 3559 /// parameter packs. 3560 /// 3561 /// \returns true if an error ocurred, false otherwise. 3562 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3563 UnexpandedParameterPackContext UPPC); 3564 3565 /// \brief Collect the set of unexpanded parameter packs within the given 3566 /// template argument. 3567 /// 3568 /// \param Arg The template argument that will be traversed to find 3569 /// unexpanded parameter packs. 3570 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3571 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3572 3573 /// \brief Collect the set of unexpanded parameter packs within the given 3574 /// template argument. 3575 /// 3576 /// \param Arg The template argument that will be traversed to find 3577 /// unexpanded parameter packs. 3578 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3579 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3580 3581 /// \brief Collect the set of unexpanded parameter packs within the given 3582 /// type. 3583 /// 3584 /// \param T The type that will be traversed to find 3585 /// unexpanded parameter packs. 3586 void collectUnexpandedParameterPacks(QualType T, 3587 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3588 3589 /// \brief Collect the set of unexpanded parameter packs within the given 3590 /// type. 3591 /// 3592 /// \param TL The type that will be traversed to find 3593 /// unexpanded parameter packs. 3594 void collectUnexpandedParameterPacks(TypeLoc TL, 3595 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3596 3597 /// \brief Invoked when parsing a template argument followed by an 3598 /// ellipsis, which creates a pack expansion. 3599 /// 3600 /// \param Arg The template argument preceding the ellipsis, which 3601 /// may already be invalid. 3602 /// 3603 /// \param EllipsisLoc The location of the ellipsis. 3604 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3605 SourceLocation EllipsisLoc); 3606 3607 /// \brief Invoked when parsing a type followed by an ellipsis, which 3608 /// creates a pack expansion. 3609 /// 3610 /// \param Type The type preceding the ellipsis, which will become 3611 /// the pattern of the pack expansion. 3612 /// 3613 /// \param EllipsisLoc The location of the ellipsis. 3614 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3615 3616 /// \brief Construct a pack expansion type from the pattern of the pack 3617 /// expansion. 3618 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3619 SourceLocation EllipsisLoc, 3620 llvm::Optional<unsigned> NumExpansions); 3621 3622 /// \brief Construct a pack expansion type from the pattern of the pack 3623 /// expansion. 3624 QualType CheckPackExpansion(QualType Pattern, 3625 SourceRange PatternRange, 3626 SourceLocation EllipsisLoc, 3627 llvm::Optional<unsigned> NumExpansions); 3628 3629 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3630 /// creates a pack expansion. 3631 /// 3632 /// \param Pattern The expression preceding the ellipsis, which will become 3633 /// the pattern of the pack expansion. 3634 /// 3635 /// \param EllipsisLoc The location of the ellipsis. 3636 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3637 3638 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3639 /// creates a pack expansion. 3640 /// 3641 /// \param Pattern The expression preceding the ellipsis, which will become 3642 /// the pattern of the pack expansion. 3643 /// 3644 /// \param EllipsisLoc The location of the ellipsis. 3645 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3646 llvm::Optional<unsigned> NumExpansions); 3647 3648 /// \brief Determine whether we could expand a pack expansion with the 3649 /// given set of parameter packs into separate arguments by repeatedly 3650 /// transforming the pattern. 3651 /// 3652 /// \param EllipsisLoc The location of the ellipsis that identifies the 3653 /// pack expansion. 3654 /// 3655 /// \param PatternRange The source range that covers the entire pattern of 3656 /// the pack expansion. 3657 /// 3658 /// \param Unexpanded The set of unexpanded parameter packs within the 3659 /// pattern. 3660 /// 3661 /// \param NumUnexpanded The number of unexpanded parameter packs in 3662 /// \p Unexpanded. 3663 /// 3664 /// \param ShouldExpand Will be set to \c true if the transformer should 3665 /// expand the corresponding pack expansions into separate arguments. When 3666 /// set, \c NumExpansions must also be set. 3667 /// 3668 /// \param RetainExpansion Whether the caller should add an unexpanded 3669 /// pack expansion after all of the expanded arguments. This is used 3670 /// when extending explicitly-specified template argument packs per 3671 /// C++0x [temp.arg.explicit]p9. 3672 /// 3673 /// \param NumExpansions The number of separate arguments that will be in 3674 /// the expanded form of the corresponding pack expansion. This is both an 3675 /// input and an output parameter, which can be set by the caller if the 3676 /// number of expansions is known a priori (e.g., due to a prior substitution) 3677 /// and will be set by the callee when the number of expansions is known. 3678 /// The callee must set this value when \c ShouldExpand is \c true; it may 3679 /// set this value in other cases. 3680 /// 3681 /// \returns true if an error occurred (e.g., because the parameter packs 3682 /// are to be instantiated with arguments of different lengths), false 3683 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3684 /// must be set. 3685 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3686 SourceRange PatternRange, 3687 const UnexpandedParameterPack *Unexpanded, 3688 unsigned NumUnexpanded, 3689 const MultiLevelTemplateArgumentList &TemplateArgs, 3690 bool &ShouldExpand, 3691 bool &RetainExpansion, 3692 llvm::Optional<unsigned> &NumExpansions); 3693 3694 /// \brief Determine the number of arguments in the given pack expansion 3695 /// type. 3696 /// 3697 /// This routine already assumes that the pack expansion type can be 3698 /// expanded and that the number of arguments in the expansion is 3699 /// consistent across all of the unexpanded parameter packs in its pattern. 3700 unsigned getNumArgumentsInExpansion(QualType T, 3701 const MultiLevelTemplateArgumentList &TemplateArgs); 3702 3703 /// \brief Determine whether the given declarator contains any unexpanded 3704 /// parameter packs. 3705 /// 3706 /// This routine is used by the parser to disambiguate function declarators 3707 /// with an ellipsis prior to the ')', e.g., 3708 /// 3709 /// \code 3710 /// void f(T...); 3711 /// \endcode 3712 /// 3713 /// To determine whether we have an (unnamed) function parameter pack or 3714 /// a variadic function. 3715 /// 3716 /// \returns true if the declarator contains any unexpanded parameter packs, 3717 /// false otherwise. 3718 bool containsUnexpandedParameterPacks(Declarator &D); 3719 3720 //===--------------------------------------------------------------------===// 3721 // C++ Template Argument Deduction (C++ [temp.deduct]) 3722 //===--------------------------------------------------------------------===// 3723 3724 /// \brief Describes the result of template argument deduction. 3725 /// 3726 /// The TemplateDeductionResult enumeration describes the result of 3727 /// template argument deduction, as returned from 3728 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3729 /// structure provides additional information about the results of 3730 /// template argument deduction, e.g., the deduced template argument 3731 /// list (if successful) or the specific template parameters or 3732 /// deduced arguments that were involved in the failure. 3733 enum TemplateDeductionResult { 3734 /// \brief Template argument deduction was successful. 3735 TDK_Success = 0, 3736 /// \brief Template argument deduction exceeded the maximum template 3737 /// instantiation depth (which has already been diagnosed). 3738 TDK_InstantiationDepth, 3739 /// \brief Template argument deduction did not deduce a value 3740 /// for every template parameter. 3741 TDK_Incomplete, 3742 /// \brief Template argument deduction produced inconsistent 3743 /// deduced values for the given template parameter. 3744 TDK_Inconsistent, 3745 /// \brief Template argument deduction failed due to inconsistent 3746 /// cv-qualifiers on a template parameter type that would 3747 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3748 /// but were given a non-const "X". 3749 TDK_Underqualified, 3750 /// \brief Substitution of the deduced template argument values 3751 /// resulted in an error. 3752 TDK_SubstitutionFailure, 3753 /// \brief Substitution of the deduced template argument values 3754 /// into a non-deduced context produced a type or value that 3755 /// produces a type that does not match the original template 3756 /// arguments provided. 3757 TDK_NonDeducedMismatch, 3758 /// \brief When performing template argument deduction for a function 3759 /// template, there were too many call arguments. 3760 TDK_TooManyArguments, 3761 /// \brief When performing template argument deduction for a function 3762 /// template, there were too few call arguments. 3763 TDK_TooFewArguments, 3764 /// \brief The explicitly-specified template arguments were not valid 3765 /// template arguments for the given template. 3766 TDK_InvalidExplicitArguments, 3767 /// \brief The arguments included an overloaded function name that could 3768 /// not be resolved to a suitable function. 3769 TDK_FailedOverloadResolution 3770 }; 3771 3772 TemplateDeductionResult 3773 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3774 const TemplateArgumentList &TemplateArgs, 3775 sema::TemplateDeductionInfo &Info); 3776 3777 TemplateDeductionResult 3778 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3779 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3780 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3781 llvm::SmallVectorImpl<QualType> &ParamTypes, 3782 QualType *FunctionType, 3783 sema::TemplateDeductionInfo &Info); 3784 3785 TemplateDeductionResult 3786 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3787 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3788 unsigned NumExplicitlySpecified, 3789 FunctionDecl *&Specialization, 3790 sema::TemplateDeductionInfo &Info); 3791 3792 TemplateDeductionResult 3793 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3794 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3795 Expr **Args, unsigned NumArgs, 3796 FunctionDecl *&Specialization, 3797 sema::TemplateDeductionInfo &Info); 3798 3799 TemplateDeductionResult 3800 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3801 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3802 QualType ArgFunctionType, 3803 FunctionDecl *&Specialization, 3804 sema::TemplateDeductionInfo &Info); 3805 3806 TemplateDeductionResult 3807 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3808 QualType ToType, 3809 CXXConversionDecl *&Specialization, 3810 sema::TemplateDeductionInfo &Info); 3811 3812 TemplateDeductionResult 3813 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3814 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3815 FunctionDecl *&Specialization, 3816 sema::TemplateDeductionInfo &Info); 3817 3818 bool DeduceAutoType(QualType AutoType, Expr *Initializer, QualType &Result); 3819 3820 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3821 FunctionTemplateDecl *FT2, 3822 SourceLocation Loc, 3823 TemplatePartialOrderingContext TPOC, 3824 unsigned NumCallArguments); 3825 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3826 UnresolvedSetIterator SEnd, 3827 TemplatePartialOrderingContext TPOC, 3828 unsigned NumCallArguments, 3829 SourceLocation Loc, 3830 const PartialDiagnostic &NoneDiag, 3831 const PartialDiagnostic &AmbigDiag, 3832 const PartialDiagnostic &CandidateDiag, 3833 bool Complain = true); 3834 3835 ClassTemplatePartialSpecializationDecl * 3836 getMoreSpecializedPartialSpecialization( 3837 ClassTemplatePartialSpecializationDecl *PS1, 3838 ClassTemplatePartialSpecializationDecl *PS2, 3839 SourceLocation Loc); 3840 3841 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3842 bool OnlyDeduced, 3843 unsigned Depth, 3844 llvm::SmallVectorImpl<bool> &Used); 3845 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3846 llvm::SmallVectorImpl<bool> &Deduced); 3847 3848 //===--------------------------------------------------------------------===// 3849 // C++ Template Instantiation 3850 // 3851 3852 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3853 const TemplateArgumentList *Innermost = 0, 3854 bool RelativeToPrimary = false, 3855 const FunctionDecl *Pattern = 0); 3856 3857 /// \brief A template instantiation that is currently in progress. 3858 struct ActiveTemplateInstantiation { 3859 /// \brief The kind of template instantiation we are performing 3860 enum InstantiationKind { 3861 /// We are instantiating a template declaration. The entity is 3862 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3863 TemplateInstantiation, 3864 3865 /// We are instantiating a default argument for a template 3866 /// parameter. The Entity is the template, and 3867 /// TemplateArgs/NumTemplateArguments provides the template 3868 /// arguments as specified. 3869 /// FIXME: Use a TemplateArgumentList 3870 DefaultTemplateArgumentInstantiation, 3871 3872 /// We are instantiating a default argument for a function. 3873 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3874 /// provides the template arguments as specified. 3875 DefaultFunctionArgumentInstantiation, 3876 3877 /// We are substituting explicit template arguments provided for 3878 /// a function template. The entity is a FunctionTemplateDecl. 3879 ExplicitTemplateArgumentSubstitution, 3880 3881 /// We are substituting template argument determined as part of 3882 /// template argument deduction for either a class template 3883 /// partial specialization or a function template. The 3884 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3885 /// a FunctionTemplateDecl. 3886 DeducedTemplateArgumentSubstitution, 3887 3888 /// We are substituting prior template arguments into a new 3889 /// template parameter. The template parameter itself is either a 3890 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3891 PriorTemplateArgumentSubstitution, 3892 3893 /// We are checking the validity of a default template argument that 3894 /// has been used when naming a template-id. 3895 DefaultTemplateArgumentChecking 3896 } Kind; 3897 3898 /// \brief The point of instantiation within the source code. 3899 SourceLocation PointOfInstantiation; 3900 3901 /// \brief The template (or partial specialization) in which we are 3902 /// performing the instantiation, for substitutions of prior template 3903 /// arguments. 3904 NamedDecl *Template; 3905 3906 /// \brief The entity that is being instantiated. 3907 uintptr_t Entity; 3908 3909 /// \brief The list of template arguments we are substituting, if they 3910 /// are not part of the entity. 3911 const TemplateArgument *TemplateArgs; 3912 3913 /// \brief The number of template arguments in TemplateArgs. 3914 unsigned NumTemplateArgs; 3915 3916 /// \brief The template deduction info object associated with the 3917 /// substitution or checking of explicit or deduced template arguments. 3918 sema::TemplateDeductionInfo *DeductionInfo; 3919 3920 /// \brief The source range that covers the construct that cause 3921 /// the instantiation, e.g., the template-id that causes a class 3922 /// template instantiation. 3923 SourceRange InstantiationRange; 3924 3925 ActiveTemplateInstantiation() 3926 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 3927 NumTemplateArgs(0), DeductionInfo(0) {} 3928 3929 /// \brief Determines whether this template is an actual instantiation 3930 /// that should be counted toward the maximum instantiation depth. 3931 bool isInstantiationRecord() const; 3932 3933 friend bool operator==(const ActiveTemplateInstantiation &X, 3934 const ActiveTemplateInstantiation &Y) { 3935 if (X.Kind != Y.Kind) 3936 return false; 3937 3938 if (X.Entity != Y.Entity) 3939 return false; 3940 3941 switch (X.Kind) { 3942 case TemplateInstantiation: 3943 return true; 3944 3945 case PriorTemplateArgumentSubstitution: 3946 case DefaultTemplateArgumentChecking: 3947 if (X.Template != Y.Template) 3948 return false; 3949 3950 // Fall through 3951 3952 case DefaultTemplateArgumentInstantiation: 3953 case ExplicitTemplateArgumentSubstitution: 3954 case DeducedTemplateArgumentSubstitution: 3955 case DefaultFunctionArgumentInstantiation: 3956 return X.TemplateArgs == Y.TemplateArgs; 3957 3958 } 3959 3960 return true; 3961 } 3962 3963 friend bool operator!=(const ActiveTemplateInstantiation &X, 3964 const ActiveTemplateInstantiation &Y) { 3965 return !(X == Y); 3966 } 3967 }; 3968 3969 /// \brief List of active template instantiations. 3970 /// 3971 /// This vector is treated as a stack. As one template instantiation 3972 /// requires another template instantiation, additional 3973 /// instantiations are pushed onto the stack up to a 3974 /// user-configurable limit LangOptions::InstantiationDepth. 3975 llvm::SmallVector<ActiveTemplateInstantiation, 16> 3976 ActiveTemplateInstantiations; 3977 3978 /// \brief Whether we are in a SFINAE context that is not associated with 3979 /// template instantiation. 3980 /// 3981 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 3982 /// of a template instantiation or template argument deduction. 3983 bool InNonInstantiationSFINAEContext; 3984 3985 /// \brief The number of ActiveTemplateInstantiation entries in 3986 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 3987 /// therefore, should not be counted as part of the instantiation depth. 3988 unsigned NonInstantiationEntries; 3989 3990 /// \brief The last template from which a template instantiation 3991 /// error or warning was produced. 3992 /// 3993 /// This value is used to suppress printing of redundant template 3994 /// instantiation backtraces when there are multiple errors in the 3995 /// same instantiation. FIXME: Does this belong in Sema? It's tough 3996 /// to implement it anywhere else. 3997 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 3998 3999 /// \brief The current index into pack expansion arguments that will be 4000 /// used for substitution of parameter packs. 4001 /// 4002 /// The pack expansion index will be -1 to indicate that parameter packs 4003 /// should be instantiated as themselves. Otherwise, the index specifies 4004 /// which argument within the parameter pack will be used for substitution. 4005 int ArgumentPackSubstitutionIndex; 4006 4007 /// \brief RAII object used to change the argument pack substitution index 4008 /// within a \c Sema object. 4009 /// 4010 /// See \c ArgumentPackSubstitutionIndex for more information. 4011 class ArgumentPackSubstitutionIndexRAII { 4012 Sema &Self; 4013 int OldSubstitutionIndex; 4014 4015 public: 4016 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4017 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4018 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4019 } 4020 4021 ~ArgumentPackSubstitutionIndexRAII() { 4022 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4023 } 4024 }; 4025 4026 friend class ArgumentPackSubstitutionRAII; 4027 4028 /// \brief The stack of calls expression undergoing template instantiation. 4029 /// 4030 /// The top of this stack is used by a fixit instantiating unresolved 4031 /// function calls to fix the AST to match the textual change it prints. 4032 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4033 4034 /// \brief For each declaration that involved template argument deduction, the 4035 /// set of diagnostics that were suppressed during that template argument 4036 /// deduction. 4037 /// 4038 /// FIXME: Serialize this structure to the AST file. 4039 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4040 SuppressedDiagnostics; 4041 4042 /// \brief A stack object to be created when performing template 4043 /// instantiation. 4044 /// 4045 /// Construction of an object of type \c InstantiatingTemplate 4046 /// pushes the current instantiation onto the stack of active 4047 /// instantiations. If the size of this stack exceeds the maximum 4048 /// number of recursive template instantiations, construction 4049 /// produces an error and evaluates true. 4050 /// 4051 /// Destruction of this object will pop the named instantiation off 4052 /// the stack. 4053 struct InstantiatingTemplate { 4054 /// \brief Note that we are instantiating a class template, 4055 /// function template, or a member thereof. 4056 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4057 Decl *Entity, 4058 SourceRange InstantiationRange = SourceRange()); 4059 4060 /// \brief Note that we are instantiating a default argument in a 4061 /// template-id. 4062 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4063 TemplateDecl *Template, 4064 const TemplateArgument *TemplateArgs, 4065 unsigned NumTemplateArgs, 4066 SourceRange InstantiationRange = SourceRange()); 4067 4068 /// \brief Note that we are instantiating a default argument in a 4069 /// template-id. 4070 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4071 FunctionTemplateDecl *FunctionTemplate, 4072 const TemplateArgument *TemplateArgs, 4073 unsigned NumTemplateArgs, 4074 ActiveTemplateInstantiation::InstantiationKind Kind, 4075 sema::TemplateDeductionInfo &DeductionInfo, 4076 SourceRange InstantiationRange = SourceRange()); 4077 4078 /// \brief Note that we are instantiating as part of template 4079 /// argument deduction for a class template partial 4080 /// specialization. 4081 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4082 ClassTemplatePartialSpecializationDecl *PartialSpec, 4083 const TemplateArgument *TemplateArgs, 4084 unsigned NumTemplateArgs, 4085 sema::TemplateDeductionInfo &DeductionInfo, 4086 SourceRange InstantiationRange = SourceRange()); 4087 4088 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4089 ParmVarDecl *Param, 4090 const TemplateArgument *TemplateArgs, 4091 unsigned NumTemplateArgs, 4092 SourceRange InstantiationRange = SourceRange()); 4093 4094 /// \brief Note that we are substituting prior template arguments into a 4095 /// non-type or template template parameter. 4096 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4097 NamedDecl *Template, 4098 NonTypeTemplateParmDecl *Param, 4099 const TemplateArgument *TemplateArgs, 4100 unsigned NumTemplateArgs, 4101 SourceRange InstantiationRange); 4102 4103 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4104 NamedDecl *Template, 4105 TemplateTemplateParmDecl *Param, 4106 const TemplateArgument *TemplateArgs, 4107 unsigned NumTemplateArgs, 4108 SourceRange InstantiationRange); 4109 4110 /// \brief Note that we are checking the default template argument 4111 /// against the template parameter for a given template-id. 4112 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4113 TemplateDecl *Template, 4114 NamedDecl *Param, 4115 const TemplateArgument *TemplateArgs, 4116 unsigned NumTemplateArgs, 4117 SourceRange InstantiationRange); 4118 4119 4120 /// \brief Note that we have finished instantiating this template. 4121 void Clear(); 4122 4123 ~InstantiatingTemplate() { Clear(); } 4124 4125 /// \brief Determines whether we have exceeded the maximum 4126 /// recursive template instantiations. 4127 operator bool() const { return Invalid; } 4128 4129 private: 4130 Sema &SemaRef; 4131 bool Invalid; 4132 bool SavedInNonInstantiationSFINAEContext; 4133 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4134 SourceRange InstantiationRange); 4135 4136 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4137 4138 InstantiatingTemplate& 4139 operator=(const InstantiatingTemplate&); // not implemented 4140 }; 4141 4142 void PrintInstantiationStack(); 4143 4144 /// \brief Determines whether we are currently in a context where 4145 /// template argument substitution failures are not considered 4146 /// errors. 4147 /// 4148 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4149 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4150 /// template-deduction context object, which can be used to capture 4151 /// diagnostics that will be suppressed. 4152 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4153 4154 /// \brief RAII class used to determine whether SFINAE has 4155 /// trapped any errors that occur during template argument 4156 /// deduction.` 4157 class SFINAETrap { 4158 Sema &SemaRef; 4159 unsigned PrevSFINAEErrors; 4160 bool PrevInNonInstantiationSFINAEContext; 4161 bool PrevAccessCheckingSFINAE; 4162 4163 public: 4164 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4165 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4166 PrevInNonInstantiationSFINAEContext( 4167 SemaRef.InNonInstantiationSFINAEContext), 4168 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4169 { 4170 if (!SemaRef.isSFINAEContext()) 4171 SemaRef.InNonInstantiationSFINAEContext = true; 4172 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4173 } 4174 4175 ~SFINAETrap() { 4176 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4177 SemaRef.InNonInstantiationSFINAEContext 4178 = PrevInNonInstantiationSFINAEContext; 4179 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4180 } 4181 4182 /// \brief Determine whether any SFINAE errors have been trapped. 4183 bool hasErrorOccurred() const { 4184 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4185 } 4186 }; 4187 4188 /// \brief The current instantiation scope used to store local 4189 /// variables. 4190 LocalInstantiationScope *CurrentInstantiationScope; 4191 4192 /// \brief The number of typos corrected by CorrectTypo. 4193 unsigned TyposCorrected; 4194 4195 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4196 UnqualifiedTyposCorrectedMap; 4197 4198 /// \brief A cache containing the results of typo correction for unqualified 4199 /// name lookup. 4200 /// 4201 /// The string is the string that we corrected to (which may be empty, if 4202 /// there was no correction), while the boolean will be true when the 4203 /// string represents a keyword. 4204 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4205 4206 /// \brief Worker object for performing CFG-based warnings. 4207 sema::AnalysisBasedWarnings AnalysisWarnings; 4208 4209 /// \brief An entity for which implicit template instantiation is required. 4210 /// 4211 /// The source location associated with the declaration is the first place in 4212 /// the source code where the declaration was "used". It is not necessarily 4213 /// the point of instantiation (which will be either before or after the 4214 /// namespace-scope declaration that triggered this implicit instantiation), 4215 /// However, it is the location that diagnostics should generally refer to, 4216 /// because users will need to know what code triggered the instantiation. 4217 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4218 4219 /// \brief The queue of implicit template instantiations that are required 4220 /// but have not yet been performed. 4221 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4222 4223 /// \brief The queue of implicit template instantiations that are required 4224 /// and must be performed within the current local scope. 4225 /// 4226 /// This queue is only used for member functions of local classes in 4227 /// templates, which must be instantiated in the same scope as their 4228 /// enclosing function, so that they can reference function-local 4229 /// types, static variables, enumerators, etc. 4230 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4231 4232 void PerformPendingInstantiations(bool LocalOnly = false); 4233 4234 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4235 const MultiLevelTemplateArgumentList &TemplateArgs, 4236 SourceLocation Loc, DeclarationName Entity); 4237 4238 QualType SubstType(QualType T, 4239 const MultiLevelTemplateArgumentList &TemplateArgs, 4240 SourceLocation Loc, DeclarationName Entity); 4241 4242 TypeSourceInfo *SubstType(TypeLoc TL, 4243 const MultiLevelTemplateArgumentList &TemplateArgs, 4244 SourceLocation Loc, DeclarationName Entity); 4245 4246 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4247 const MultiLevelTemplateArgumentList &TemplateArgs, 4248 SourceLocation Loc, 4249 DeclarationName Entity); 4250 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4251 const MultiLevelTemplateArgumentList &TemplateArgs, 4252 llvm::Optional<unsigned> NumExpansions); 4253 bool SubstParmTypes(SourceLocation Loc, 4254 ParmVarDecl **Params, unsigned NumParams, 4255 const MultiLevelTemplateArgumentList &TemplateArgs, 4256 llvm::SmallVectorImpl<QualType> &ParamTypes, 4257 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4258 ExprResult SubstExpr(Expr *E, 4259 const MultiLevelTemplateArgumentList &TemplateArgs); 4260 4261 /// \brief Substitute the given template arguments into a list of 4262 /// expressions, expanding pack expansions if required. 4263 /// 4264 /// \param Exprs The list of expressions to substitute into. 4265 /// 4266 /// \param NumExprs The number of expressions in \p Exprs. 4267 /// 4268 /// \param IsCall Whether this is some form of call, in which case 4269 /// default arguments will be dropped. 4270 /// 4271 /// \param TemplateArgs The set of template arguments to substitute. 4272 /// 4273 /// \param Outputs Will receive all of the substituted arguments. 4274 /// 4275 /// \returns true if an error occurred, false otherwise. 4276 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4277 const MultiLevelTemplateArgumentList &TemplateArgs, 4278 llvm::SmallVectorImpl<Expr *> &Outputs); 4279 4280 StmtResult SubstStmt(Stmt *S, 4281 const MultiLevelTemplateArgumentList &TemplateArgs); 4282 4283 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4284 const MultiLevelTemplateArgumentList &TemplateArgs); 4285 4286 bool 4287 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4288 CXXRecordDecl *Pattern, 4289 const MultiLevelTemplateArgumentList &TemplateArgs); 4290 4291 bool 4292 InstantiateClass(SourceLocation PointOfInstantiation, 4293 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4294 const MultiLevelTemplateArgumentList &TemplateArgs, 4295 TemplateSpecializationKind TSK, 4296 bool Complain = true); 4297 4298 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4299 Decl *Pattern, Decl *Inst); 4300 4301 bool 4302 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4303 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4304 TemplateSpecializationKind TSK, 4305 bool Complain = true); 4306 4307 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4308 CXXRecordDecl *Instantiation, 4309 const MultiLevelTemplateArgumentList &TemplateArgs, 4310 TemplateSpecializationKind TSK); 4311 4312 void InstantiateClassTemplateSpecializationMembers( 4313 SourceLocation PointOfInstantiation, 4314 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4315 TemplateSpecializationKind TSK); 4316 4317 NestedNameSpecifier * 4318 SubstNestedNameSpecifier(NestedNameSpecifier *NNS, 4319 SourceRange Range, 4320 const MultiLevelTemplateArgumentList &TemplateArgs); 4321 4322 NestedNameSpecifierLoc 4323 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4324 const MultiLevelTemplateArgumentList &TemplateArgs); 4325 4326 DeclarationNameInfo 4327 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4328 const MultiLevelTemplateArgumentList &TemplateArgs); 4329 TemplateName 4330 SubstTemplateName(TemplateName Name, SourceLocation Loc, 4331 const MultiLevelTemplateArgumentList &TemplateArgs); 4332 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4333 TemplateArgumentListInfo &Result, 4334 const MultiLevelTemplateArgumentList &TemplateArgs); 4335 4336 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4337 FunctionDecl *Function, 4338 bool Recursive = false, 4339 bool DefinitionRequired = false); 4340 void InstantiateStaticDataMemberDefinition( 4341 SourceLocation PointOfInstantiation, 4342 VarDecl *Var, 4343 bool Recursive = false, 4344 bool DefinitionRequired = false); 4345 4346 void InstantiateMemInitializers(CXXConstructorDecl *New, 4347 const CXXConstructorDecl *Tmpl, 4348 const MultiLevelTemplateArgumentList &TemplateArgs); 4349 4350 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4351 const MultiLevelTemplateArgumentList &TemplateArgs); 4352 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4353 const MultiLevelTemplateArgumentList &TemplateArgs); 4354 4355 // Objective-C declarations. 4356 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4357 IdentifierInfo *ClassName, 4358 SourceLocation ClassLoc, 4359 IdentifierInfo *SuperName, 4360 SourceLocation SuperLoc, 4361 Decl * const *ProtoRefs, 4362 unsigned NumProtoRefs, 4363 const SourceLocation *ProtoLocs, 4364 SourceLocation EndProtoLoc, 4365 AttributeList *AttrList); 4366 4367 Decl *ActOnCompatiblityAlias( 4368 SourceLocation AtCompatibilityAliasLoc, 4369 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4370 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4371 4372 void CheckForwardProtocolDeclarationForCircularDependency( 4373 IdentifierInfo *PName, 4374 SourceLocation &PLoc, SourceLocation PrevLoc, 4375 const ObjCList<ObjCProtocolDecl> &PList); 4376 4377 Decl *ActOnStartProtocolInterface( 4378 SourceLocation AtProtoInterfaceLoc, 4379 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4380 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4381 const SourceLocation *ProtoLocs, 4382 SourceLocation EndProtoLoc, 4383 AttributeList *AttrList); 4384 4385 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4386 IdentifierInfo *ClassName, 4387 SourceLocation ClassLoc, 4388 IdentifierInfo *CategoryName, 4389 SourceLocation CategoryLoc, 4390 Decl * const *ProtoRefs, 4391 unsigned NumProtoRefs, 4392 const SourceLocation *ProtoLocs, 4393 SourceLocation EndProtoLoc); 4394 4395 Decl *ActOnStartClassImplementation( 4396 SourceLocation AtClassImplLoc, 4397 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4398 IdentifierInfo *SuperClassname, 4399 SourceLocation SuperClassLoc); 4400 4401 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4402 IdentifierInfo *ClassName, 4403 SourceLocation ClassLoc, 4404 IdentifierInfo *CatName, 4405 SourceLocation CatLoc); 4406 4407 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4408 IdentifierInfo **IdentList, 4409 SourceLocation *IdentLocs, 4410 unsigned NumElts); 4411 4412 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4413 const IdentifierLocPair *IdentList, 4414 unsigned NumElts, 4415 AttributeList *attrList); 4416 4417 void FindProtocolDeclaration(bool WarnOnDeclarations, 4418 const IdentifierLocPair *ProtocolId, 4419 unsigned NumProtocols, 4420 llvm::SmallVectorImpl<Decl *> &Protocols); 4421 4422 /// Ensure attributes are consistent with type. 4423 /// \param [in, out] Attributes The attributes to check; they will 4424 /// be modified to be consistent with \arg PropertyTy. 4425 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4426 SourceLocation Loc, 4427 unsigned &Attributes); 4428 4429 /// Process the specified property declaration and create decls for the 4430 /// setters and getters as needed. 4431 /// \param property The property declaration being processed 4432 /// \param DC The semantic container for the property 4433 /// \param redeclaredProperty Declaration for property if redeclared 4434 /// in class extension. 4435 /// \param lexicalDC Container for redeclaredProperty. 4436 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4437 ObjCContainerDecl *DC, 4438 ObjCPropertyDecl *redeclaredProperty = 0, 4439 ObjCContainerDecl *lexicalDC = 0); 4440 4441 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4442 ObjCPropertyDecl *SuperProperty, 4443 const IdentifierInfo *Name); 4444 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4445 4446 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4447 ObjCMethodDecl *MethodDecl, 4448 bool IsInstance); 4449 4450 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4451 4452 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4453 ObjCInterfaceDecl *ID); 4454 4455 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4456 ObjCProtocolDecl *PDecl); 4457 4458 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4459 Decl **allMethods = 0, unsigned allNum = 0, 4460 Decl **allProperties = 0, unsigned pNum = 0, 4461 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4462 4463 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4464 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4465 Selector GetterSel, Selector SetterSel, 4466 Decl *ClassCategory, 4467 bool *OverridingProperty, 4468 tok::ObjCKeywordKind MethodImplKind, 4469 DeclContext *lexicalDC = 0); 4470 4471 Decl *ActOnPropertyImplDecl(Scope *S, 4472 SourceLocation AtLoc, 4473 SourceLocation PropertyLoc, 4474 bool ImplKind,Decl *ClassImplDecl, 4475 IdentifierInfo *PropertyId, 4476 IdentifierInfo *PropertyIvar, 4477 SourceLocation PropertyIvarLoc); 4478 4479 struct ObjCArgInfo { 4480 IdentifierInfo *Name; 4481 SourceLocation NameLoc; 4482 // The Type is null if no type was specified, and the DeclSpec is invalid 4483 // in this case. 4484 ParsedType Type; 4485 ObjCDeclSpec DeclSpec; 4486 4487 /// ArgAttrs - Attribute list for this argument. 4488 AttributeList *ArgAttrs; 4489 }; 4490 4491 Decl *ActOnMethodDeclaration( 4492 Scope *S, 4493 SourceLocation BeginLoc, // location of the + or -. 4494 SourceLocation EndLoc, // location of the ; or {. 4495 tok::TokenKind MethodType, 4496 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4497 Selector Sel, 4498 // optional arguments. The number of types/arguments is obtained 4499 // from the Sel.getNumArgs(). 4500 ObjCArgInfo *ArgInfo, 4501 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4502 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4503 bool isVariadic = false); 4504 4505 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4506 // Will search "local" class/category implementations for a method decl. 4507 // Will also search in class's root looking for instance method. 4508 // Returns 0 if no method is found. 4509 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4510 ObjCInterfaceDecl *CDecl); 4511 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4512 ObjCInterfaceDecl *ClassDecl); 4513 4514 ExprResult 4515 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4516 Expr *BaseExpr, 4517 DeclarationName MemberName, 4518 SourceLocation MemberLoc, 4519 SourceLocation SuperLoc, QualType SuperType, 4520 bool Super); 4521 4522 ExprResult 4523 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4524 IdentifierInfo &propertyName, 4525 SourceLocation receiverNameLoc, 4526 SourceLocation propertyNameLoc); 4527 4528 ObjCMethodDecl *tryCaptureObjCSelf(); 4529 4530 /// \brief Describes the kind of message expression indicated by a message 4531 /// send that starts with an identifier. 4532 enum ObjCMessageKind { 4533 /// \brief The message is sent to 'super'. 4534 ObjCSuperMessage, 4535 /// \brief The message is an instance message. 4536 ObjCInstanceMessage, 4537 /// \brief The message is a class message, and the identifier is a type 4538 /// name. 4539 ObjCClassMessage 4540 }; 4541 4542 ObjCMessageKind getObjCMessageKind(Scope *S, 4543 IdentifierInfo *Name, 4544 SourceLocation NameLoc, 4545 bool IsSuper, 4546 bool HasTrailingDot, 4547 ParsedType &ReceiverType); 4548 4549 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4550 Selector Sel, 4551 SourceLocation LBracLoc, 4552 SourceLocation SelectorLoc, 4553 SourceLocation RBracLoc, 4554 MultiExprArg Args); 4555 4556 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4557 QualType ReceiverType, 4558 SourceLocation SuperLoc, 4559 Selector Sel, 4560 ObjCMethodDecl *Method, 4561 SourceLocation LBracLoc, 4562 SourceLocation SelectorLoc, 4563 SourceLocation RBracLoc, 4564 MultiExprArg Args); 4565 4566 ExprResult ActOnClassMessage(Scope *S, 4567 ParsedType Receiver, 4568 Selector Sel, 4569 SourceLocation LBracLoc, 4570 SourceLocation SelectorLoc, 4571 SourceLocation RBracLoc, 4572 MultiExprArg Args); 4573 4574 ExprResult BuildInstanceMessage(Expr *Receiver, 4575 QualType ReceiverType, 4576 SourceLocation SuperLoc, 4577 Selector Sel, 4578 ObjCMethodDecl *Method, 4579 SourceLocation LBracLoc, 4580 SourceLocation SelectorLoc, 4581 SourceLocation RBracLoc, 4582 MultiExprArg Args); 4583 4584 ExprResult ActOnInstanceMessage(Scope *S, 4585 Expr *Receiver, 4586 Selector Sel, 4587 SourceLocation LBracLoc, 4588 SourceLocation SelectorLoc, 4589 SourceLocation RBracLoc, 4590 MultiExprArg Args); 4591 4592 4593 enum PragmaOptionsAlignKind { 4594 POAK_Native, // #pragma options align=native 4595 POAK_Natural, // #pragma options align=natural 4596 POAK_Packed, // #pragma options align=packed 4597 POAK_Power, // #pragma options align=power 4598 POAK_Mac68k, // #pragma options align=mac68k 4599 POAK_Reset // #pragma options align=reset 4600 }; 4601 4602 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4603 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4604 SourceLocation PragmaLoc, 4605 SourceLocation KindLoc); 4606 4607 enum PragmaPackKind { 4608 PPK_Default, // #pragma pack([n]) 4609 PPK_Show, // #pragma pack(show), only supported by MSVC. 4610 PPK_Push, // #pragma pack(push, [identifier], [n]) 4611 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4612 }; 4613 4614 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4615 void ActOnPragmaPack(PragmaPackKind Kind, 4616 IdentifierInfo *Name, 4617 Expr *Alignment, 4618 SourceLocation PragmaLoc, 4619 SourceLocation LParenLoc, 4620 SourceLocation RParenLoc); 4621 4622 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4623 void ActOnPragmaUnused(const Token &Identifier, 4624 Scope *curScope, 4625 SourceLocation PragmaLoc); 4626 4627 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4628 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4629 SourceLocation PragmaLoc); 4630 4631 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4632 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4633 4634 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4635 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4636 SourceLocation PragmaLoc, 4637 SourceLocation WeakNameLoc); 4638 4639 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4640 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4641 IdentifierInfo* AliasName, 4642 SourceLocation PragmaLoc, 4643 SourceLocation WeakNameLoc, 4644 SourceLocation AliasNameLoc); 4645 4646 /// ActOnPragmaFPContract - Called on well formed 4647 /// #pragma {STDC,OPENCL} FP_CONTRACT 4648 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4649 4650 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4651 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4652 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4653 4654 /// FreePackedContext - Deallocate and null out PackContext. 4655 void FreePackedContext(); 4656 4657 /// PushNamespaceVisibilityAttr - Note that we've entered a 4658 /// namespace with a visibility attribute. 4659 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4660 4661 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4662 /// add an appropriate visibility attribute. 4663 void AddPushedVisibilityAttribute(Decl *RD); 4664 4665 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4666 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4667 void PopPragmaVisibility(); 4668 4669 /// FreeVisContext - Deallocate and null out VisContext. 4670 void FreeVisContext(); 4671 4672 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4673 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4674 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4675 4676 /// CastCategory - Get the correct forwarded implicit cast result category 4677 /// from the inner expression. 4678 ExprValueKind CastCategory(Expr *E); 4679 4680 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4681 /// cast. If there is already an implicit cast, merge into the existing one. 4682 /// If isLvalue, the result of the cast is an lvalue. 4683 void ImpCastExprToType(Expr *&Expr, QualType Type, CastKind CK, 4684 ExprValueKind VK = VK_RValue, 4685 const CXXCastPath *BasePath = 0); 4686 4687 /// IgnoredValueConversions - Given that an expression's result is 4688 /// syntactically ignored, perform any conversions that are 4689 /// required. 4690 void IgnoredValueConversions(Expr *&expr); 4691 4692 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4693 // functions and arrays to their respective pointers (C99 6.3.2.1). 4694 Expr *UsualUnaryConversions(Expr *&expr); 4695 4696 // DefaultFunctionArrayConversion - converts functions and arrays 4697 // to their respective pointers (C99 6.3.2.1). 4698 void DefaultFunctionArrayConversion(Expr *&expr); 4699 4700 // DefaultFunctionArrayLvalueConversion - converts functions and 4701 // arrays to their respective pointers and performs the 4702 // lvalue-to-rvalue conversion. 4703 void DefaultFunctionArrayLvalueConversion(Expr *&expr); 4704 4705 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4706 // the operand. This is DefaultFunctionArrayLvalueConversion, 4707 // except that it assumes the operand isn't of function or array 4708 // type. 4709 void DefaultLvalueConversion(Expr *&expr); 4710 4711 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4712 // do not have a prototype. Integer promotions are performed on each 4713 // argument, and arguments that have type float are promoted to double. 4714 void DefaultArgumentPromotion(Expr *&Expr); 4715 4716 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4717 enum VariadicCallType { 4718 VariadicFunction, 4719 VariadicBlock, 4720 VariadicMethod, 4721 VariadicConstructor, 4722 VariadicDoesNotApply 4723 }; 4724 4725 /// GatherArgumentsForCall - Collector argument expressions for various 4726 /// form of call prototypes. 4727 bool GatherArgumentsForCall(SourceLocation CallLoc, 4728 FunctionDecl *FDecl, 4729 const FunctionProtoType *Proto, 4730 unsigned FirstProtoArg, 4731 Expr **Args, unsigned NumArgs, 4732 llvm::SmallVector<Expr *, 8> &AllArgs, 4733 VariadicCallType CallType = VariadicDoesNotApply); 4734 4735 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4736 // will warn if the resulting type is not a POD type. 4737 bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT, 4738 FunctionDecl *FDecl); 4739 4740 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4741 // operands and then handles various conversions that are common to binary 4742 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4743 // routine returns the first non-arithmetic type found. The client is 4744 // responsible for emitting appropriate error diagnostics. 4745 QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr, 4746 bool isCompAssign = false); 4747 4748 /// AssignConvertType - All of the 'assignment' semantic checks return this 4749 /// enum to indicate whether the assignment was allowed. These checks are 4750 /// done for simple assignments, as well as initialization, return from 4751 /// function, argument passing, etc. The query is phrased in terms of a 4752 /// source and destination type. 4753 enum AssignConvertType { 4754 /// Compatible - the types are compatible according to the standard. 4755 Compatible, 4756 4757 /// PointerToInt - The assignment converts a pointer to an int, which we 4758 /// accept as an extension. 4759 PointerToInt, 4760 4761 /// IntToPointer - The assignment converts an int to a pointer, which we 4762 /// accept as an extension. 4763 IntToPointer, 4764 4765 /// FunctionVoidPointer - The assignment is between a function pointer and 4766 /// void*, which the standard doesn't allow, but we accept as an extension. 4767 FunctionVoidPointer, 4768 4769 /// IncompatiblePointer - The assignment is between two pointers types that 4770 /// are not compatible, but we accept them as an extension. 4771 IncompatiblePointer, 4772 4773 /// IncompatiblePointer - The assignment is between two pointers types which 4774 /// point to integers which have a different sign, but are otherwise identical. 4775 /// This is a subset of the above, but broken out because it's by far the most 4776 /// common case of incompatible pointers. 4777 IncompatiblePointerSign, 4778 4779 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4780 /// c/v/r qualifiers, which we accept as an extension. 4781 CompatiblePointerDiscardsQualifiers, 4782 4783 /// IncompatiblePointerDiscardsQualifiers - The assignment 4784 /// discards qualifiers that we don't permit to be discarded, 4785 /// like address spaces. 4786 IncompatiblePointerDiscardsQualifiers, 4787 4788 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4789 /// nested pointer types, and the qualifiers other than the first two 4790 /// levels differ e.g. char ** -> const char **, but we accept them as an 4791 /// extension. 4792 IncompatibleNestedPointerQualifiers, 4793 4794 /// IncompatibleVectors - The assignment is between two vector types that 4795 /// have the same size, which we accept as an extension. 4796 IncompatibleVectors, 4797 4798 /// IntToBlockPointer - The assignment converts an int to a block 4799 /// pointer. We disallow this. 4800 IntToBlockPointer, 4801 4802 /// IncompatibleBlockPointer - The assignment is between two block 4803 /// pointers types that are not compatible. 4804 IncompatibleBlockPointer, 4805 4806 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4807 /// id type and something else (that is incompatible with it). For example, 4808 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4809 IncompatibleObjCQualifiedId, 4810 4811 /// Incompatible - We reject this conversion outright, it is invalid to 4812 /// represent it in the AST. 4813 Incompatible 4814 }; 4815 4816 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4817 /// assignment conversion type specified by ConvTy. This returns true if the 4818 /// conversion was invalid or false if the conversion was accepted. 4819 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4820 SourceLocation Loc, 4821 QualType DstType, QualType SrcType, 4822 Expr *SrcExpr, AssignmentAction Action, 4823 bool *Complained = 0); 4824 4825 /// CheckAssignmentConstraints - Perform type checking for assignment, 4826 /// argument passing, variable initialization, and function return values. 4827 /// C99 6.5.16. 4828 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 4829 QualType lhs, QualType rhs); 4830 4831 /// Check assignment constraints and prepare for a conversion of the 4832 /// RHS to the LHS type. 4833 AssignConvertType CheckAssignmentConstraints(QualType lhs, Expr *&rhs, 4834 CastKind &Kind); 4835 4836 // CheckSingleAssignmentConstraints - Currently used by 4837 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4838 // this routine performs the default function/array converions. 4839 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4840 Expr *&rExpr); 4841 4842 // \brief If the lhs type is a transparent union, check whether we 4843 // can initialize the transparent union with the given expression. 4844 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4845 Expr *&rExpr); 4846 4847 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4848 4849 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4850 4851 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4852 AssignmentAction Action, 4853 bool AllowExplicit = false); 4854 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4855 AssignmentAction Action, 4856 bool AllowExplicit, 4857 ImplicitConversionSequence& ICS); 4858 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4859 const ImplicitConversionSequence& ICS, 4860 AssignmentAction Action, 4861 bool CStyle = false); 4862 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4863 const StandardConversionSequence& SCS, 4864 AssignmentAction Action, 4865 bool CStyle); 4866 4867 /// the following "Check" methods will return a valid/converted QualType 4868 /// or a null QualType (indicating an error diagnostic was issued). 4869 4870 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4871 QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4872 QualType CheckPointerToMemberOperands( // C++ 5.5 4873 Expr *&lex, Expr *&rex, ExprValueKind &VK, 4874 SourceLocation OpLoc, bool isIndirect); 4875 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4876 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign, 4877 bool isDivide); 4878 QualType CheckRemainderOperands( // C99 6.5.5 4879 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4880 QualType CheckAdditionOperands( // C99 6.5.6 4881 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4882 QualType CheckSubtractionOperands( // C99 6.5.6 4883 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4884 QualType CheckShiftOperands( // C99 6.5.7 4885 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4886 bool isCompAssign = false); 4887 QualType CheckCompareOperands( // C99 6.5.8/9 4888 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4889 bool isRelational); 4890 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4891 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4892 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4893 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc); 4894 // CheckAssignmentOperands is used for both simple and compound assignment. 4895 // For simple assignment, pass both expressions and a null converted type. 4896 // For compound assignment, pass both expressions and the converted type. 4897 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4898 Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType); 4899 4900 void ConvertPropertyForRValue(Expr *&E); 4901 void ConvertPropertyForLValue(Expr *&LHS, Expr *&RHS, QualType& LHSTy); 4902 4903 QualType CheckConditionalOperands( // C99 6.5.15 4904 Expr *&cond, Expr *&lhs, Expr *&rhs, 4905 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4906 QualType CXXCheckConditionalOperands( // C++ 5.16 4907 Expr *&cond, Expr *&lhs, Expr *&rhs, 4908 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4909 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4910 bool *NonStandardCompositeType = 0); 4911 4912 QualType FindCompositeObjCPointerType(Expr *&LHS, Expr *&RHS, 4913 SourceLocation questionLoc); 4914 4915 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 4916 SourceLocation QuestionLoc); 4917 4918 /// type checking for vector binary operators. 4919 QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4920 QualType CheckVectorCompareOperands(Expr *&lex, Expr *&rx, 4921 SourceLocation l, bool isRel); 4922 4923 /// type checking declaration initializers (C99 6.7.8) 4924 bool CheckInitList(const InitializedEntity &Entity, 4925 InitListExpr *&InitList, QualType &DeclType); 4926 bool CheckForConstantInitializer(Expr *e, QualType t); 4927 4928 // type checking C++ declaration initializers (C++ [dcl.init]). 4929 4930 /// ReferenceCompareResult - Expresses the result of comparing two 4931 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 4932 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 4933 enum ReferenceCompareResult { 4934 /// Ref_Incompatible - The two types are incompatible, so direct 4935 /// reference binding is not possible. 4936 Ref_Incompatible = 0, 4937 /// Ref_Related - The two types are reference-related, which means 4938 /// that their unqualified forms (T1 and T2) are either the same 4939 /// or T1 is a base class of T2. 4940 Ref_Related, 4941 /// Ref_Compatible_With_Added_Qualification - The two types are 4942 /// reference-compatible with added qualification, meaning that 4943 /// they are reference-compatible and the qualifiers on T1 (cv1) 4944 /// are greater than the qualifiers on T2 (cv2). 4945 Ref_Compatible_With_Added_Qualification, 4946 /// Ref_Compatible - The two types are reference-compatible and 4947 /// have equivalent qualifiers (cv1 == cv2). 4948 Ref_Compatible 4949 }; 4950 4951 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 4952 QualType T1, QualType T2, 4953 bool &DerivedToBase, 4954 bool &ObjCConversion); 4955 4956 /// CheckCastTypes - Check type constraints for casting between types under 4957 /// C semantics, or forward to CXXCheckCStyleCast in C++. 4958 bool CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *&CastExpr, 4959 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 4960 bool FunctionalStyle = false); 4961 4962 // CheckVectorCast - check type constraints for vectors. 4963 // Since vectors are an extension, there are no C standard reference for this. 4964 // We allow casting between vectors and integer datatypes of the same size. 4965 // returns true if the cast is invalid 4966 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 4967 CastKind &Kind); 4968 4969 // CheckExtVectorCast - check type constraints for extended vectors. 4970 // Since vectors are an extension, there are no C standard reference for this. 4971 // We allow casting between vectors and integer datatypes of the same size, 4972 // or vectors and the element type of that vector. 4973 // returns true if the cast is invalid 4974 bool CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *&CastExpr, 4975 CastKind &Kind); 4976 4977 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 4978 /// cast under C++ semantics. 4979 bool CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 4980 Expr *&CastExpr, CastKind &Kind, 4981 CXXCastPath &BasePath, bool FunctionalStyle); 4982 4983 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 4984 /// \param Method - May be null. 4985 /// \param [out] ReturnType - The return type of the send. 4986 /// \return true iff there were any incompatible types. 4987 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 4988 ObjCMethodDecl *Method, bool isClassMessage, 4989 SourceLocation lbrac, SourceLocation rbrac, 4990 QualType &ReturnType, ExprValueKind &VK); 4991 4992 /// CheckBooleanCondition - Diagnose problems involving the use of 4993 /// the given expression as a boolean condition (e.g. in an if 4994 /// statement). Also performs the standard function and array 4995 /// decays, possibly changing the input variable. 4996 /// 4997 /// \param Loc - A location associated with the condition, e.g. the 4998 /// 'if' keyword. 4999 /// \return true iff there were any errors 5000 bool CheckBooleanCondition(Expr *&CondExpr, SourceLocation Loc); 5001 5002 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5003 Expr *SubExpr); 5004 5005 /// DiagnoseAssignmentAsCondition - Given that an expression is 5006 /// being used as a boolean condition, warn if it's an assignment. 5007 void DiagnoseAssignmentAsCondition(Expr *E); 5008 5009 /// \brief Redundant parentheses over an equality comparison can indicate 5010 /// that the user intended an assignment used as condition. 5011 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5012 5013 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5014 bool CheckCXXBooleanCondition(Expr *&CondExpr); 5015 5016 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5017 /// the specified width and sign. If an overflow occurs, detect it and emit 5018 /// the specified diagnostic. 5019 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5020 unsigned NewWidth, bool NewSign, 5021 SourceLocation Loc, unsigned DiagID); 5022 5023 /// Checks that the Objective-C declaration is declared in the global scope. 5024 /// Emits an error and marks the declaration as invalid if it's not declared 5025 /// in the global scope. 5026 bool CheckObjCDeclScope(Decl *D); 5027 5028 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5029 /// and reports the appropriate diagnostics. Returns false on success. 5030 /// Can optionally return the value of the expression. 5031 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5032 5033 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5034 /// the correct width, and that the field type is valid. 5035 /// Returns false on success. 5036 /// Can optionally return whether the bit-field is of width 0 5037 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5038 QualType FieldTy, const Expr *BitWidth, 5039 bool *ZeroWidth = 0); 5040 5041 /// \name Code completion 5042 //@{ 5043 /// \brief Describes the context in which code completion occurs. 5044 enum ParserCompletionContext { 5045 /// \brief Code completion occurs at top-level or namespace context. 5046 PCC_Namespace, 5047 /// \brief Code completion occurs within a class, struct, or union. 5048 PCC_Class, 5049 /// \brief Code completion occurs within an Objective-C interface, protocol, 5050 /// or category. 5051 PCC_ObjCInterface, 5052 /// \brief Code completion occurs within an Objective-C implementation or 5053 /// category implementation 5054 PCC_ObjCImplementation, 5055 /// \brief Code completion occurs within the list of instance variables 5056 /// in an Objective-C interface, protocol, category, or implementation. 5057 PCC_ObjCInstanceVariableList, 5058 /// \brief Code completion occurs following one or more template 5059 /// headers. 5060 PCC_Template, 5061 /// \brief Code completion occurs following one or more template 5062 /// headers within a class. 5063 PCC_MemberTemplate, 5064 /// \brief Code completion occurs within an expression. 5065 PCC_Expression, 5066 /// \brief Code completion occurs within a statement, which may 5067 /// also be an expression or a declaration. 5068 PCC_Statement, 5069 /// \brief Code completion occurs at the beginning of the 5070 /// initialization statement (or expression) in a for loop. 5071 PCC_ForInit, 5072 /// \brief Code completion occurs within the condition of an if, 5073 /// while, switch, or for statement. 5074 PCC_Condition, 5075 /// \brief Code completion occurs within the body of a function on a 5076 /// recovery path, where we do not have a specific handle on our position 5077 /// in the grammar. 5078 PCC_RecoveryInFunction, 5079 /// \brief Code completion occurs where only a type is permitted. 5080 PCC_Type, 5081 /// \brief Code completion occurs in a parenthesized expression, which 5082 /// might also be a type cast. 5083 PCC_ParenthesizedExpression, 5084 /// \brief Code completion occurs within a sequence of declaration 5085 /// specifiers within a function, method, or block. 5086 PCC_LocalDeclarationSpecifiers 5087 }; 5088 5089 void CodeCompleteOrdinaryName(Scope *S, 5090 ParserCompletionContext CompletionContext); 5091 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5092 bool AllowNonIdentifiers, 5093 bool AllowNestedNameSpecifiers); 5094 5095 struct CodeCompleteExpressionData; 5096 void CodeCompleteExpression(Scope *S, 5097 const CodeCompleteExpressionData &Data); 5098 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5099 SourceLocation OpLoc, 5100 bool IsArrow); 5101 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5102 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5103 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5104 void CodeCompleteCase(Scope *S); 5105 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5106 void CodeCompleteInitializer(Scope *S, Decl *D); 5107 void CodeCompleteReturn(Scope *S); 5108 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5109 5110 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5111 bool EnteringContext); 5112 void CodeCompleteUsing(Scope *S); 5113 void CodeCompleteUsingDirective(Scope *S); 5114 void CodeCompleteNamespaceDecl(Scope *S); 5115 void CodeCompleteNamespaceAliasDecl(Scope *S); 5116 void CodeCompleteOperatorName(Scope *S); 5117 void CodeCompleteConstructorInitializer(Decl *Constructor, 5118 CXXCtorInitializer** Initializers, 5119 unsigned NumInitializers); 5120 5121 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5122 bool InInterface); 5123 void CodeCompleteObjCAtVisibility(Scope *S); 5124 void CodeCompleteObjCAtStatement(Scope *S); 5125 void CodeCompleteObjCAtExpression(Scope *S); 5126 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5127 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5128 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5129 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5130 bool IsParameter); 5131 void CodeCompleteObjCMessageReceiver(Scope *S); 5132 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5133 IdentifierInfo **SelIdents, 5134 unsigned NumSelIdents, 5135 bool AtArgumentExpression); 5136 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5137 IdentifierInfo **SelIdents, 5138 unsigned NumSelIdents, 5139 bool AtArgumentExpression, 5140 bool IsSuper = false); 5141 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5142 IdentifierInfo **SelIdents, 5143 unsigned NumSelIdents, 5144 bool AtArgumentExpression, 5145 ObjCInterfaceDecl *Super = 0); 5146 void CodeCompleteObjCForCollection(Scope *S, 5147 DeclGroupPtrTy IterationVar); 5148 void CodeCompleteObjCSelector(Scope *S, 5149 IdentifierInfo **SelIdents, 5150 unsigned NumSelIdents); 5151 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5152 unsigned NumProtocols); 5153 void CodeCompleteObjCProtocolDecl(Scope *S); 5154 void CodeCompleteObjCInterfaceDecl(Scope *S); 5155 void CodeCompleteObjCSuperclass(Scope *S, 5156 IdentifierInfo *ClassName, 5157 SourceLocation ClassNameLoc); 5158 void CodeCompleteObjCImplementationDecl(Scope *S); 5159 void CodeCompleteObjCInterfaceCategory(Scope *S, 5160 IdentifierInfo *ClassName, 5161 SourceLocation ClassNameLoc); 5162 void CodeCompleteObjCImplementationCategory(Scope *S, 5163 IdentifierInfo *ClassName, 5164 SourceLocation ClassNameLoc); 5165 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5166 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5167 IdentifierInfo *PropertyName, 5168 Decl *ObjCImpDecl); 5169 void CodeCompleteObjCMethodDecl(Scope *S, 5170 bool IsInstanceMethod, 5171 ParsedType ReturnType, 5172 Decl *IDecl); 5173 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5174 bool IsInstanceMethod, 5175 bool AtParameterName, 5176 ParsedType ReturnType, 5177 IdentifierInfo **SelIdents, 5178 unsigned NumSelIdents); 5179 void CodeCompletePreprocessorDirective(bool InConditional); 5180 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5181 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5182 void CodeCompletePreprocessorExpression(); 5183 void CodeCompletePreprocessorMacroArgument(Scope *S, 5184 IdentifierInfo *Macro, 5185 MacroInfo *MacroInfo, 5186 unsigned Argument); 5187 void CodeCompleteNaturalLanguage(); 5188 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5189 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5190 //@} 5191 5192 void PrintStats() const {} 5193 5194 //===--------------------------------------------------------------------===// 5195 // Extra semantic analysis beyond the C type system 5196 5197public: 5198 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5199 unsigned ByteNo) const; 5200 5201private: 5202 void CheckArrayAccess(const ArraySubscriptExpr *E); 5203 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5204 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5205 5206 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5207 bool CheckObjCString(Expr *Arg); 5208 5209 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5210 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5211 5212 bool SemaBuiltinVAStart(CallExpr *TheCall); 5213 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5214 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5215 5216public: 5217 // Used by C++ template instantiation. 5218 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5219 5220private: 5221 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5222 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5223 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5224 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5225 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5226 llvm::APSInt &Result); 5227 5228 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5229 bool HasVAListArg, unsigned format_idx, 5230 unsigned firstDataArg, bool isPrintf); 5231 5232 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5233 const CallExpr *TheCall, bool HasVAListArg, 5234 unsigned format_idx, unsigned firstDataArg, 5235 bool isPrintf); 5236 5237 void CheckNonNullArguments(const NonNullAttr *NonNull, 5238 const CallExpr *TheCall); 5239 5240 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5241 unsigned format_idx, unsigned firstDataArg, 5242 bool isPrintf); 5243 5244 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5245 SourceLocation ReturnLoc); 5246 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5247 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5248 5249 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5250 Expr *Init); 5251 5252 /// \brief The parser's current scope. 5253 /// 5254 /// The parser maintains this state here. 5255 Scope *CurScope; 5256 5257protected: 5258 friend class Parser; 5259 friend class InitializationSequence; 5260 5261 /// \brief Retrieve the parser's current scope. 5262 Scope *getCurScope() const { return CurScope; } 5263}; 5264 5265/// \brief RAII object that enters a new expression evaluation context. 5266class EnterExpressionEvaluationContext { 5267 Sema &Actions; 5268 5269public: 5270 EnterExpressionEvaluationContext(Sema &Actions, 5271 Sema::ExpressionEvaluationContext NewContext) 5272 : Actions(Actions) { 5273 Actions.PushExpressionEvaluationContext(NewContext); 5274 } 5275 5276 ~EnterExpressionEvaluationContext() { 5277 Actions.PopExpressionEvaluationContext(); 5278 } 5279}; 5280 5281} // end namespace clang 5282 5283#endif 5284