Sema.h revision 9151c11836f5fbb36cedfe4d22df7e00e77a1d42
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 mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1072 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1073 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1074 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1075 1076 // AssignmentAction - This is used by all the assignment diagnostic functions 1077 // to represent what is actually causing the operation 1078 enum AssignmentAction { 1079 AA_Assigning, 1080 AA_Passing, 1081 AA_Returning, 1082 AA_Converting, 1083 AA_Initializing, 1084 AA_Sending, 1085 AA_Casting 1086 }; 1087 1088 /// C++ Overloading. 1089 enum OverloadKind { 1090 /// This is a legitimate overload: the existing declarations are 1091 /// functions or function templates with different signatures. 1092 Ovl_Overload, 1093 1094 /// This is not an overload because the signature exactly matches 1095 /// an existing declaration. 1096 Ovl_Match, 1097 1098 /// This is not an overload because the lookup results contain a 1099 /// non-function. 1100 Ovl_NonFunction 1101 }; 1102 OverloadKind CheckOverload(Scope *S, 1103 FunctionDecl *New, 1104 const LookupResult &OldDecls, 1105 NamedDecl *&OldDecl, 1106 bool IsForUsingDecl); 1107 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1108 1109 bool TryImplicitConversion(InitializationSequence &Sequence, 1110 const InitializedEntity &Entity, 1111 Expr *From, 1112 bool SuppressUserConversions, 1113 bool AllowExplicit, 1114 bool InOverloadResolution, 1115 bool CStyle); 1116 1117 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1118 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1119 bool IsComplexPromotion(QualType FromType, QualType ToType); 1120 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1121 bool InOverloadResolution, 1122 QualType& ConvertedType, bool &IncompatibleObjC); 1123 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1124 QualType& ConvertedType, bool &IncompatibleObjC); 1125 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1126 QualType& ConvertedType); 1127 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1128 const FunctionProtoType *NewType); 1129 1130 bool CheckPointerConversion(Expr *From, QualType ToType, 1131 CastKind &Kind, 1132 CXXCastPath& BasePath, 1133 bool IgnoreBaseAccess); 1134 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1135 bool InOverloadResolution, 1136 QualType &ConvertedType); 1137 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1138 CastKind &Kind, 1139 CXXCastPath &BasePath, 1140 bool IgnoreBaseAccess); 1141 bool IsQualificationConversion(QualType FromType, QualType ToType, 1142 bool CStyle); 1143 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1144 1145 1146 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1147 const VarDecl *NRVOCandidate, 1148 QualType ResultType, 1149 Expr *Value); 1150 1151 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1152 SourceLocation EqualLoc, 1153 ExprResult Init); 1154 bool PerformObjectArgumentInitialization(Expr *&From, 1155 NestedNameSpecifier *Qualifier, 1156 NamedDecl *FoundDecl, 1157 CXXMethodDecl *Method); 1158 1159 bool PerformContextuallyConvertToBool(Expr *&From); 1160 bool PerformContextuallyConvertToObjCId(Expr *&From); 1161 1162 ExprResult 1163 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1164 const PartialDiagnostic &NotIntDiag, 1165 const PartialDiagnostic &IncompleteDiag, 1166 const PartialDiagnostic &ExplicitConvDiag, 1167 const PartialDiagnostic &ExplicitConvNote, 1168 const PartialDiagnostic &AmbigDiag, 1169 const PartialDiagnostic &AmbigNote, 1170 const PartialDiagnostic &ConvDiag); 1171 1172 bool PerformObjectMemberConversion(Expr *&From, 1173 NestedNameSpecifier *Qualifier, 1174 NamedDecl *FoundDecl, 1175 NamedDecl *Member); 1176 1177 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1178 // TODO: make this is a typesafe union. 1179 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1180 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1181 1182 void AddOverloadCandidate(NamedDecl *Function, 1183 DeclAccessPair FoundDecl, 1184 Expr **Args, unsigned NumArgs, 1185 OverloadCandidateSet &CandidateSet); 1186 1187 void AddOverloadCandidate(FunctionDecl *Function, 1188 DeclAccessPair FoundDecl, 1189 Expr **Args, unsigned NumArgs, 1190 OverloadCandidateSet& CandidateSet, 1191 bool SuppressUserConversions = false, 1192 bool PartialOverloading = false); 1193 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1194 Expr **Args, unsigned NumArgs, 1195 OverloadCandidateSet& CandidateSet, 1196 bool SuppressUserConversions = false); 1197 void AddMethodCandidate(DeclAccessPair FoundDecl, 1198 QualType ObjectType, 1199 Expr::Classification ObjectClassification, 1200 Expr **Args, unsigned NumArgs, 1201 OverloadCandidateSet& CandidateSet, 1202 bool SuppressUserConversion = false); 1203 void AddMethodCandidate(CXXMethodDecl *Method, 1204 DeclAccessPair FoundDecl, 1205 CXXRecordDecl *ActingContext, QualType ObjectType, 1206 Expr::Classification ObjectClassification, 1207 Expr **Args, unsigned NumArgs, 1208 OverloadCandidateSet& CandidateSet, 1209 bool SuppressUserConversions = false); 1210 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1211 DeclAccessPair FoundDecl, 1212 CXXRecordDecl *ActingContext, 1213 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1214 QualType ObjectType, 1215 Expr::Classification ObjectClassification, 1216 Expr **Args, unsigned NumArgs, 1217 OverloadCandidateSet& CandidateSet, 1218 bool SuppressUserConversions = false); 1219 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1220 DeclAccessPair FoundDecl, 1221 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1222 Expr **Args, unsigned NumArgs, 1223 OverloadCandidateSet& CandidateSet, 1224 bool SuppressUserConversions = false); 1225 void AddConversionCandidate(CXXConversionDecl *Conversion, 1226 DeclAccessPair FoundDecl, 1227 CXXRecordDecl *ActingContext, 1228 Expr *From, QualType ToType, 1229 OverloadCandidateSet& CandidateSet); 1230 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1231 DeclAccessPair FoundDecl, 1232 CXXRecordDecl *ActingContext, 1233 Expr *From, QualType ToType, 1234 OverloadCandidateSet &CandidateSet); 1235 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1236 DeclAccessPair FoundDecl, 1237 CXXRecordDecl *ActingContext, 1238 const FunctionProtoType *Proto, 1239 Expr *Object, Expr **Args, unsigned NumArgs, 1240 OverloadCandidateSet& CandidateSet); 1241 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1242 SourceLocation OpLoc, 1243 Expr **Args, unsigned NumArgs, 1244 OverloadCandidateSet& CandidateSet, 1245 SourceRange OpRange = SourceRange()); 1246 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1247 Expr **Args, unsigned NumArgs, 1248 OverloadCandidateSet& CandidateSet, 1249 bool IsAssignmentOperator = false, 1250 unsigned NumContextualBoolArguments = 0); 1251 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1252 SourceLocation OpLoc, 1253 Expr **Args, unsigned NumArgs, 1254 OverloadCandidateSet& CandidateSet); 1255 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1256 bool Operator, 1257 Expr **Args, unsigned NumArgs, 1258 const TemplateArgumentListInfo *ExplicitTemplateArgs, 1259 OverloadCandidateSet& CandidateSet, 1260 bool PartialOverloading = false); 1261 1262 // Emit as a 'note' the specific overload candidate 1263 void NoteOverloadCandidate(FunctionDecl *Fn); 1264 1265 // Emit as a series of 'note's all template and non-templates 1266 // identified by the expression Expr 1267 void NoteAllOverloadCandidates(Expr* E); 1268 1269 // [PossiblyAFunctionType] --> [Return] 1270 // NonFunctionType --> NonFunctionType 1271 // R (A) --> R(A) 1272 // R (*)(A) --> R (A) 1273 // R (&)(A) --> R (A) 1274 // R (S::*)(A) --> R (A) 1275 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1276 1277 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1278 bool Complain, 1279 DeclAccessPair &Found); 1280 1281 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1282 bool Complain = false, 1283 DeclAccessPair* Found = 0); 1284 1285 Expr *FixOverloadedFunctionReference(Expr *E, 1286 DeclAccessPair FoundDecl, 1287 FunctionDecl *Fn); 1288 ExprResult FixOverloadedFunctionReference(ExprResult, 1289 DeclAccessPair FoundDecl, 1290 FunctionDecl *Fn); 1291 1292 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1293 Expr **Args, unsigned NumArgs, 1294 OverloadCandidateSet &CandidateSet, 1295 bool PartialOverloading = false); 1296 1297 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1298 UnresolvedLookupExpr *ULE, 1299 SourceLocation LParenLoc, 1300 Expr **Args, unsigned NumArgs, 1301 SourceLocation RParenLoc, 1302 Expr *ExecConfig); 1303 1304 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1305 unsigned Opc, 1306 const UnresolvedSetImpl &Fns, 1307 Expr *input); 1308 1309 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1310 unsigned Opc, 1311 const UnresolvedSetImpl &Fns, 1312 Expr *LHS, Expr *RHS); 1313 1314 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1315 SourceLocation RLoc, 1316 Expr *Base,Expr *Idx); 1317 1318 ExprResult 1319 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1320 SourceLocation LParenLoc, Expr **Args, 1321 unsigned NumArgs, SourceLocation RParenLoc); 1322 ExprResult 1323 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1324 Expr **Args, unsigned NumArgs, 1325 SourceLocation RParenLoc); 1326 1327 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1328 SourceLocation OpLoc); 1329 1330 /// CheckCallReturnType - Checks that a call expression's return type is 1331 /// complete. Returns true on failure. The location passed in is the location 1332 /// that best represents the call. 1333 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1334 CallExpr *CE, FunctionDecl *FD); 1335 1336 /// Helpers for dealing with blocks and functions. 1337 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1338 bool CheckParameterNames); 1339 void CheckCXXDefaultArguments(FunctionDecl *FD); 1340 void CheckExtraCXXDefaultArguments(Declarator &D); 1341 Scope *getNonFieldDeclScope(Scope *S); 1342 1343 /// \name Name lookup 1344 /// 1345 /// These routines provide name lookup that is used during semantic 1346 /// analysis to resolve the various kinds of names (identifiers, 1347 /// overloaded operator names, constructor names, etc.) into zero or 1348 /// more declarations within a particular scope. The major entry 1349 /// points are LookupName, which performs unqualified name lookup, 1350 /// and LookupQualifiedName, which performs qualified name lookup. 1351 /// 1352 /// All name lookup is performed based on some specific criteria, 1353 /// which specify what names will be visible to name lookup and how 1354 /// far name lookup should work. These criteria are important both 1355 /// for capturing language semantics (certain lookups will ignore 1356 /// certain names, for example) and for performance, since name 1357 /// lookup is often a bottleneck in the compilation of C++. Name 1358 /// lookup criteria is specified via the LookupCriteria enumeration. 1359 /// 1360 /// The results of name lookup can vary based on the kind of name 1361 /// lookup performed, the current language, and the translation 1362 /// unit. In C, for example, name lookup will either return nothing 1363 /// (no entity found) or a single declaration. In C++, name lookup 1364 /// can additionally refer to a set of overloaded functions or 1365 /// result in an ambiguity. All of the possible results of name 1366 /// lookup are captured by the LookupResult class, which provides 1367 /// the ability to distinguish among them. 1368 //@{ 1369 1370 /// @brief Describes the kind of name lookup to perform. 1371 enum LookupNameKind { 1372 /// Ordinary name lookup, which finds ordinary names (functions, 1373 /// variables, typedefs, etc.) in C and most kinds of names 1374 /// (functions, variables, members, types, etc.) in C++. 1375 LookupOrdinaryName = 0, 1376 /// Tag name lookup, which finds the names of enums, classes, 1377 /// structs, and unions. 1378 LookupTagName, 1379 /// Label name lookup. 1380 LookupLabel, 1381 /// Member name lookup, which finds the names of 1382 /// class/struct/union members. 1383 LookupMemberName, 1384 /// Look up of an operator name (e.g., operator+) for use with 1385 /// operator overloading. This lookup is similar to ordinary name 1386 /// lookup, but will ignore any declarations that are class members. 1387 LookupOperatorName, 1388 /// Look up of a name that precedes the '::' scope resolution 1389 /// operator in C++. This lookup completely ignores operator, object, 1390 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1391 LookupNestedNameSpecifierName, 1392 /// Look up a namespace name within a C++ using directive or 1393 /// namespace alias definition, ignoring non-namespace names (C++ 1394 /// [basic.lookup.udir]p1). 1395 LookupNamespaceName, 1396 /// Look up all declarations in a scope with the given name, 1397 /// including resolved using declarations. This is appropriate 1398 /// for checking redeclarations for a using declaration. 1399 LookupUsingDeclName, 1400 /// Look up an ordinary name that is going to be redeclared as a 1401 /// name with linkage. This lookup ignores any declarations that 1402 /// are outside of the current scope unless they have linkage. See 1403 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1404 LookupRedeclarationWithLinkage, 1405 /// Look up the name of an Objective-C protocol. 1406 LookupObjCProtocolName, 1407 /// \brief Look up any declaration with any name. 1408 LookupAnyName 1409 }; 1410 1411 /// \brief Specifies whether (or how) name lookup is being performed for a 1412 /// redeclaration (vs. a reference). 1413 enum RedeclarationKind { 1414 /// \brief The lookup is a reference to this name that is not for the 1415 /// purpose of redeclaring the name. 1416 NotForRedeclaration = 0, 1417 /// \brief The lookup results will be used for redeclaration of a name, 1418 /// if an entity by that name already exists. 1419 ForRedeclaration 1420 }; 1421 1422private: 1423 bool CppLookupName(LookupResult &R, Scope *S); 1424 1425public: 1426 /// \brief Look up a name, looking for a single declaration. Return 1427 /// null if the results were absent, ambiguous, or overloaded. 1428 /// 1429 /// It is preferable to use the elaborated form and explicitly handle 1430 /// ambiguity and overloaded. 1431 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1432 SourceLocation Loc, 1433 LookupNameKind NameKind, 1434 RedeclarationKind Redecl 1435 = NotForRedeclaration); 1436 bool LookupName(LookupResult &R, Scope *S, 1437 bool AllowBuiltinCreation = false); 1438 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1439 bool InUnqualifiedLookup = false); 1440 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1441 bool AllowBuiltinCreation = false, 1442 bool EnteringContext = false); 1443 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1444 1445 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1446 QualType T1, QualType T2, 1447 UnresolvedSetImpl &Functions); 1448 1449 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation Loc, 1450 bool isLocalLabel = false); 1451 1452 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1453 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1454 1455 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1456 Expr **Args, unsigned NumArgs, 1457 ADLResult &Functions); 1458 1459 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1460 VisibleDeclConsumer &Consumer, 1461 bool IncludeGlobalScope = true); 1462 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1463 VisibleDeclConsumer &Consumer, 1464 bool IncludeGlobalScope = true); 1465 1466 /// \brief The context in which typo-correction occurs. 1467 /// 1468 /// The typo-correction context affects which keywords (if any) are 1469 /// considered when trying to correct for typos. 1470 enum CorrectTypoContext { 1471 /// \brief An unknown context, where any keyword might be valid. 1472 CTC_Unknown, 1473 /// \brief A context where no keywords are used (e.g. we expect an actual 1474 /// name). 1475 CTC_NoKeywords, 1476 /// \brief A context where we're correcting a type name. 1477 CTC_Type, 1478 /// \brief An expression context. 1479 CTC_Expression, 1480 /// \brief A type cast, or anything else that can be followed by a '<'. 1481 CTC_CXXCasts, 1482 /// \brief A member lookup context. 1483 CTC_MemberLookup, 1484 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1485 CTC_ObjCIvarLookup, 1486 /// \brief An Objective-C property lookup context (e.g., self.prop). 1487 CTC_ObjCPropertyLookup, 1488 /// \brief The receiver of an Objective-C message send within an 1489 /// Objective-C method where 'super' is a valid keyword. 1490 CTC_ObjCMessageReceiver 1491 }; 1492 1493 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1494 DeclContext *MemberContext = 0, 1495 bool EnteringContext = false, 1496 CorrectTypoContext CTC = CTC_Unknown, 1497 const ObjCObjectPointerType *OPT = 0); 1498 1499 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1500 AssociatedNamespaceSet &AssociatedNamespaces, 1501 AssociatedClassSet &AssociatedClasses); 1502 1503 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1504 //@} 1505 1506 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1507 SourceLocation IdLoc, 1508 bool TypoCorrection = false); 1509 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1510 Scope *S, bool ForRedeclaration, 1511 SourceLocation Loc); 1512 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1513 Scope *S); 1514 void AddKnownFunctionAttributes(FunctionDecl *FD); 1515 1516 // More parsing and symbol table subroutines. 1517 1518 // Decl attributes - this routine is the top level dispatcher. 1519 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1520 bool NonInheritable = true, bool Inheritable = true); 1521 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1522 bool NonInheritable = true, bool Inheritable = true); 1523 1524 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1525 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1526 bool CheckNoReturnAttr(const AttributeList &attr); 1527 1528 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1529 bool &IncompleteImpl, unsigned DiagID); 1530 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1531 ObjCMethodDecl *MethodDecl, 1532 bool IsProtocolMethodDecl); 1533 1534 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1535 ObjCInterfaceDecl *IDecl); 1536 1537 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1538 1539 /// CheckProtocolMethodDefs - This routine checks unimplemented 1540 /// methods declared in protocol, and those referenced by it. 1541 /// \param IDecl - Used for checking for methods which may have been 1542 /// inherited. 1543 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1544 ObjCProtocolDecl *PDecl, 1545 bool& IncompleteImpl, 1546 const SelectorSet &InsMap, 1547 const SelectorSet &ClsMap, 1548 ObjCContainerDecl *CDecl); 1549 1550 /// CheckImplementationIvars - This routine checks if the instance variables 1551 /// listed in the implelementation match those listed in the interface. 1552 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1553 ObjCIvarDecl **Fields, unsigned nIvars, 1554 SourceLocation Loc); 1555 1556 /// \brief Determine whether we can synthesize a provisional ivar for the 1557 /// given name. 1558 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1559 1560 /// \brief Determine whether we can synthesize a provisional ivar for the 1561 /// given property. 1562 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1563 1564 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1565 /// remains unimplemented in the class or category @implementation. 1566 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1567 ObjCContainerDecl* IDecl, 1568 bool IncompleteImpl = false); 1569 1570 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1571 /// which must be implemented by this implementation. 1572 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1573 ObjCContainerDecl *CDecl, 1574 const SelectorSet &InsMap); 1575 1576 /// DefaultSynthesizeProperties - This routine default synthesizes all 1577 /// properties which must be synthesized in class's @implementation. 1578 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1579 ObjCInterfaceDecl *IDecl); 1580 1581 /// CollectImmediateProperties - This routine collects all properties in 1582 /// the class and its conforming protocols; but not those it its super class. 1583 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1584 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1585 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1586 1587 1588 /// LookupPropertyDecl - Looks up a property in the current class and all 1589 /// its protocols. 1590 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1591 IdentifierInfo *II); 1592 1593 /// Called by ActOnProperty to handle @property declarations in 1594 //// class extensions. 1595 Decl *HandlePropertyInClassExtension(Scope *S, 1596 ObjCCategoryDecl *CDecl, 1597 SourceLocation AtLoc, 1598 FieldDeclarator &FD, 1599 Selector GetterSel, 1600 Selector SetterSel, 1601 const bool isAssign, 1602 const bool isReadWrite, 1603 const unsigned Attributes, 1604 bool *isOverridingProperty, 1605 TypeSourceInfo *T, 1606 tok::ObjCKeywordKind MethodImplKind); 1607 1608 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1609 /// handle creating the ObjcPropertyDecl for a category or @interface. 1610 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1611 ObjCContainerDecl *CDecl, 1612 SourceLocation AtLoc, 1613 FieldDeclarator &FD, 1614 Selector GetterSel, 1615 Selector SetterSel, 1616 const bool isAssign, 1617 const bool isReadWrite, 1618 const unsigned Attributes, 1619 TypeSourceInfo *T, 1620 tok::ObjCKeywordKind MethodImplKind, 1621 DeclContext *lexicalDC = 0); 1622 1623 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1624 /// warning) when atomic property has one but not the other user-declared 1625 /// setter or getter. 1626 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1627 ObjCContainerDecl* IDecl); 1628 1629 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1630 1631 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1632 /// true, or false, accordingly. 1633 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1634 const ObjCMethodDecl *PrevMethod, 1635 bool matchBasedOnSizeAndAlignment = false, 1636 bool matchBasedOnStrictEqulity = false); 1637 1638 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1639 /// or protocol against those declared in their implementations. 1640 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1641 const SelectorSet &ClsMap, 1642 SelectorSet &InsMapSeen, 1643 SelectorSet &ClsMapSeen, 1644 ObjCImplDecl* IMPDecl, 1645 ObjCContainerDecl* IDecl, 1646 bool &IncompleteImpl, 1647 bool ImmediateClass); 1648 1649private: 1650 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1651 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1652 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1653 1654 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1655 /// optionally warns if there are multiple signatures. 1656 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1657 bool receiverIdOrClass, 1658 bool warn, bool instance); 1659 1660public: 1661 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1662 /// unit are added to a global pool. This allows us to efficiently associate 1663 /// a selector with a method declaraation for purposes of typechecking 1664 /// messages sent to "id" (where the class of the object is unknown). 1665 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1666 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1667 } 1668 1669 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1670 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1671 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1672 } 1673 1674 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1675 /// there are multiple signatures. 1676 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1677 bool receiverIdOrClass=false, 1678 bool warn=true) { 1679 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1680 warn, /*instance*/true); 1681 } 1682 1683 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1684 /// there are multiple signatures. 1685 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1686 bool receiverIdOrClass=false, 1687 bool warn=true) { 1688 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1689 warn, /*instance*/false); 1690 } 1691 1692 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1693 /// implementation. 1694 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1695 1696 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1697 /// initialization. 1698 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1699 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1700 //===--------------------------------------------------------------------===// 1701 // Statement Parsing Callbacks: SemaStmt.cpp. 1702public: 1703 class FullExprArg { 1704 public: 1705 FullExprArg(Sema &actions) : E(0) { } 1706 1707 // FIXME: The const_cast here is ugly. RValue references would make this 1708 // much nicer (or we could duplicate a bunch of the move semantics 1709 // emulation code from Ownership.h). 1710 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1711 1712 ExprResult release() { 1713 return move(E); 1714 } 1715 1716 Expr *get() const { return E; } 1717 1718 Expr *operator->() { 1719 return E; 1720 } 1721 1722 private: 1723 // FIXME: No need to make the entire Sema class a friend when it's just 1724 // Sema::MakeFullExpr that needs access to the constructor below. 1725 friend class Sema; 1726 1727 explicit FullExprArg(Expr *expr) : E(expr) {} 1728 1729 Expr *E; 1730 }; 1731 1732 FullExprArg MakeFullExpr(Expr *Arg) { 1733 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1734 } 1735 1736 StmtResult ActOnExprStmt(FullExprArg Expr); 1737 1738 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1739 bool LeadingEmptyMacro = false); 1740 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1741 MultiStmtArg Elts, 1742 bool isStmtExpr); 1743 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1744 SourceLocation StartLoc, 1745 SourceLocation EndLoc); 1746 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1747 StmtResult ActOnForEachLValueExpr(Expr *E); 1748 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1749 SourceLocation DotDotDotLoc, Expr *RHSVal, 1750 SourceLocation ColonLoc); 1751 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1752 1753 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1754 SourceLocation ColonLoc, 1755 Stmt *SubStmt, Scope *CurScope); 1756 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1757 SourceLocation ColonLoc, Stmt *SubStmt); 1758 1759 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1760 FullExprArg CondVal, Decl *CondVar, 1761 Stmt *ThenVal, 1762 SourceLocation ElseLoc, Stmt *ElseVal); 1763 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1764 Expr *Cond, 1765 Decl *CondVar); 1766 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1767 Stmt *Switch, Stmt *Body); 1768 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1769 FullExprArg Cond, 1770 Decl *CondVar, Stmt *Body); 1771 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1772 SourceLocation WhileLoc, 1773 SourceLocation CondLParen, Expr *Cond, 1774 SourceLocation CondRParen); 1775 1776 StmtResult ActOnForStmt(SourceLocation ForLoc, 1777 SourceLocation LParenLoc, 1778 Stmt *First, FullExprArg Second, 1779 Decl *SecondVar, 1780 FullExprArg Third, 1781 SourceLocation RParenLoc, 1782 Stmt *Body); 1783 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1784 SourceLocation LParenLoc, 1785 Stmt *First, Expr *Second, 1786 SourceLocation RParenLoc, Stmt *Body); 1787 1788 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1789 SourceLocation LabelLoc, 1790 LabelDecl *TheDecl); 1791 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1792 SourceLocation StarLoc, 1793 Expr *DestExp); 1794 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1795 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1796 1797 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1798 bool AllowFunctionParameters); 1799 1800 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1801 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1802 1803 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1804 bool IsSimple, bool IsVolatile, 1805 unsigned NumOutputs, unsigned NumInputs, 1806 IdentifierInfo **Names, 1807 MultiExprArg Constraints, 1808 MultiExprArg Exprs, 1809 Expr *AsmString, 1810 MultiExprArg Clobbers, 1811 SourceLocation RParenLoc, 1812 bool MSAsm = false); 1813 1814 1815 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1816 IdentifierInfo *Name, SourceLocation NameLoc, 1817 bool Invalid = false); 1818 1819 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1820 1821 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1822 Decl *Parm, Stmt *Body); 1823 1824 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1825 1826 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1827 MultiStmtArg Catch, Stmt *Finally); 1828 1829 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1830 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1831 Scope *CurScope); 1832 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1833 Expr *SynchExpr, 1834 Stmt *SynchBody); 1835 1836 VarDecl *BuildExceptionDeclaration(Scope *S, 1837 TypeSourceInfo *TInfo, 1838 IdentifierInfo *Name, 1839 SourceLocation Loc); 1840 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1841 1842 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1843 Decl *ExDecl, Stmt *HandlerBlock); 1844 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1845 MultiStmtArg Handlers); 1846 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1847 1848 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1849 1850 /// \brief If it's a file scoped decl that must warn if not used, keep track 1851 /// of it. 1852 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1853 1854 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1855 /// whose result is unused, warn. 1856 void DiagnoseUnusedExprResult(const Stmt *S); 1857 void DiagnoseUnusedDecl(const NamedDecl *ND); 1858 1859 ParsingDeclState PushParsingDeclaration() { 1860 return DelayedDiagnostics.pushParsingDecl(); 1861 } 1862 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 1863 DelayedDiagnostics::popParsingDecl(*this, state, decl); 1864 } 1865 1866 typedef ProcessingContextState ParsingClassState; 1867 ParsingClassState PushParsingClass() { 1868 return DelayedDiagnostics.pushContext(); 1869 } 1870 void PopParsingClass(ParsingClassState state) { 1871 DelayedDiagnostics.popContext(state); 1872 } 1873 1874 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1875 SourceLocation Loc, bool UnknownObjCClass=false); 1876 1877 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1878 1879 //===--------------------------------------------------------------------===// 1880 // Expression Parsing Callbacks: SemaExpr.cpp. 1881 1882 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1883 bool UnknownObjCClass=false); 1884 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1885 ObjCMethodDecl *Getter, 1886 SourceLocation Loc); 1887 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1888 Expr **Args, unsigned NumArgs); 1889 1890 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1891 1892 void PopExpressionEvaluationContext(); 1893 1894 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1895 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1896 void MarkDeclarationsReferencedInExpr(Expr *E); 1897 1898 /// \brief Conditionally issue a diagnostic based on the current 1899 /// evaluation context. 1900 /// 1901 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 1902 /// the function body is parsed, and then do a basic reachability analysis to 1903 /// determine if the statement is reachable. If it is unreachable, the 1904 /// diagnostic will not be emitted. 1905 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 1906 const PartialDiagnostic &PD); 1907 1908 // Primary Expressions. 1909 SourceRange getExprRange(Expr *E) const; 1910 1911 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1912 bool HasTrailingLParen, bool IsAddressOfOperand); 1913 1914 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1915 CorrectTypoContext CTC = CTC_Unknown); 1916 1917 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1918 bool AllowBuiltinCreation=false); 1919 1920 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1921 const DeclarationNameInfo &NameInfo, 1922 bool isAddressOfOperand, 1923 const TemplateArgumentListInfo *TemplateArgs); 1924 1925 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1926 ExprValueKind VK, 1927 SourceLocation Loc, 1928 const CXXScopeSpec *SS = 0); 1929 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1930 ExprValueKind VK, 1931 const DeclarationNameInfo &NameInfo, 1932 const CXXScopeSpec *SS = 0); 1933 ExprResult 1934 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 1935 SourceLocation nameLoc, 1936 IndirectFieldDecl *indirectField, 1937 Expr *baseObjectExpr = 0, 1938 SourceLocation opLoc = SourceLocation()); 1939 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1940 LookupResult &R, 1941 const TemplateArgumentListInfo *TemplateArgs); 1942 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1943 LookupResult &R, 1944 const TemplateArgumentListInfo *TemplateArgs, 1945 bool IsDefiniteInstance); 1946 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1947 const LookupResult &R, 1948 bool HasTrailingLParen); 1949 1950 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1951 const DeclarationNameInfo &NameInfo); 1952 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1953 const DeclarationNameInfo &NameInfo, 1954 const TemplateArgumentListInfo *TemplateArgs); 1955 1956 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1957 LookupResult &R, 1958 bool ADL); 1959 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1960 const DeclarationNameInfo &NameInfo, 1961 NamedDecl *D); 1962 1963 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 1964 ExprResult ActOnNumericConstant(const Token &); 1965 ExprResult ActOnCharacterConstant(const Token &); 1966 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 1967 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 1968 SourceLocation R, 1969 MultiExprArg Val, 1970 ParsedType TypeOfCast = ParsedType()); 1971 1972 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 1973 /// fragments (e.g. "foo" "bar" L"baz"). 1974 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 1975 1976 // Binary/Unary Operators. 'Tok' is the token for the operator. 1977 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 1978 Expr *InputArg); 1979 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 1980 UnaryOperatorKind Opc, Expr *input); 1981 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 1982 tok::TokenKind Op, Expr *Input); 1983 1984 ExprResult CreateSizeOfAlignOfExpr(TypeSourceInfo *T, 1985 SourceLocation OpLoc, 1986 bool isSizeOf, SourceRange R); 1987 ExprResult CreateSizeOfAlignOfExpr(Expr *E, SourceLocation OpLoc, 1988 bool isSizeOf, SourceRange R); 1989 ExprResult 1990 ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType, 1991 void *TyOrEx, const SourceRange &ArgRange); 1992 1993 ExprResult CheckPlaceholderExpr(Expr *E, SourceLocation Loc); 1994 1995 bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc, 1996 SourceRange R, bool isSizeof); 1997 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 1998 SourceLocation OpLoc, 1999 IdentifierInfo &Name, 2000 SourceLocation NameLoc, 2001 SourceLocation RParenLoc); 2002 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2003 tok::TokenKind Kind, Expr *Input); 2004 2005 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2006 Expr *Idx, SourceLocation RLoc); 2007 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2008 Expr *Idx, SourceLocation RLoc); 2009 2010 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2011 SourceLocation OpLoc, bool IsArrow, 2012 CXXScopeSpec &SS, 2013 NamedDecl *FirstQualifierInScope, 2014 const DeclarationNameInfo &NameInfo, 2015 const TemplateArgumentListInfo *TemplateArgs); 2016 2017 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2018 SourceLocation OpLoc, bool IsArrow, 2019 const CXXScopeSpec &SS, 2020 NamedDecl *FirstQualifierInScope, 2021 LookupResult &R, 2022 const TemplateArgumentListInfo *TemplateArgs, 2023 bool SuppressQualifierCheck = false); 2024 2025 ExprResult LookupMemberExpr(LookupResult &R, Expr *&Base, 2026 bool &IsArrow, SourceLocation OpLoc, 2027 CXXScopeSpec &SS, 2028 Decl *ObjCImpDecl, 2029 bool HasTemplateArgs); 2030 2031 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2032 const CXXScopeSpec &SS, 2033 const LookupResult &R); 2034 2035 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2036 bool IsArrow, SourceLocation OpLoc, 2037 const CXXScopeSpec &SS, 2038 NamedDecl *FirstQualifierInScope, 2039 const DeclarationNameInfo &NameInfo, 2040 const TemplateArgumentListInfo *TemplateArgs); 2041 2042 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2043 SourceLocation OpLoc, 2044 tok::TokenKind OpKind, 2045 CXXScopeSpec &SS, 2046 UnqualifiedId &Member, 2047 Decl *ObjCImpDecl, 2048 bool HasTrailingLParen); 2049 2050 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2051 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2052 FunctionDecl *FDecl, 2053 const FunctionProtoType *Proto, 2054 Expr **Args, unsigned NumArgs, 2055 SourceLocation RParenLoc); 2056 2057 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2058 /// This provides the location of the left/right parens and a list of comma 2059 /// locations. 2060 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2061 MultiExprArg Args, SourceLocation RParenLoc, 2062 Expr *ExecConfig = 0); 2063 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2064 SourceLocation LParenLoc, 2065 Expr **Args, unsigned NumArgs, 2066 SourceLocation RParenLoc, 2067 Expr *ExecConfig = 0); 2068 2069 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2070 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2071 2072 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2073 ParsedType Ty, SourceLocation RParenLoc, 2074 Expr *Op); 2075 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2076 TypeSourceInfo *Ty, 2077 SourceLocation RParenLoc, 2078 Expr *Op); 2079 2080 bool TypeIsVectorType(ParsedType Ty) { 2081 return GetTypeFromParser(Ty)->isVectorType(); 2082 } 2083 2084 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2085 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2086 SourceLocation RParenLoc, Expr *E, 2087 TypeSourceInfo *TInfo); 2088 2089 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2090 ParsedType Ty, 2091 SourceLocation RParenLoc, 2092 Expr *Op); 2093 2094 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2095 TypeSourceInfo *TInfo, 2096 SourceLocation RParenLoc, 2097 Expr *InitExpr); 2098 2099 ExprResult ActOnInitList(SourceLocation LParenLoc, 2100 MultiExprArg InitList, 2101 SourceLocation RParenLoc); 2102 2103 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2104 SourceLocation Loc, 2105 bool GNUSyntax, 2106 ExprResult Init); 2107 2108 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2109 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2110 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2111 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2112 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2113 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2114 2115 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2116 /// in the case of a the GNU conditional expr extension. 2117 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2118 SourceLocation ColonLoc, 2119 Expr *Cond, Expr *LHS, Expr *RHS); 2120 2121 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2122 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2123 LabelDecl *LD); 2124 2125 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2126 SourceLocation RPLoc); // "({..})" 2127 2128 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2129 struct OffsetOfComponent { 2130 SourceLocation LocStart, LocEnd; 2131 bool isBrackets; // true if [expr], false if .ident 2132 union { 2133 IdentifierInfo *IdentInfo; 2134 ExprTy *E; 2135 } U; 2136 }; 2137 2138 /// __builtin_offsetof(type, a.b[123][456].c) 2139 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2140 TypeSourceInfo *TInfo, 2141 OffsetOfComponent *CompPtr, 2142 unsigned NumComponents, 2143 SourceLocation RParenLoc); 2144 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2145 SourceLocation BuiltinLoc, 2146 SourceLocation TypeLoc, 2147 ParsedType Arg1, 2148 OffsetOfComponent *CompPtr, 2149 unsigned NumComponents, 2150 SourceLocation RParenLoc); 2151 2152 // __builtin_choose_expr(constExpr, expr1, expr2) 2153 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2154 Expr *cond, Expr *expr1, 2155 Expr *expr2, SourceLocation RPLoc); 2156 2157 // __builtin_va_arg(expr, type) 2158 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2159 Expr *expr, ParsedType type, 2160 SourceLocation RPLoc); 2161 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2162 Expr *expr, TypeSourceInfo *TInfo, 2163 SourceLocation RPLoc); 2164 2165 // __null 2166 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2167 2168 //===------------------------- "Block" Extension ------------------------===// 2169 2170 /// ActOnBlockStart - This callback is invoked when a block literal is 2171 /// started. 2172 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2173 2174 /// ActOnBlockArguments - This callback allows processing of block arguments. 2175 /// If there are no arguments, this is still invoked. 2176 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2177 2178 /// ActOnBlockError - If there is an error parsing a block, this callback 2179 /// is invoked to pop the information about the block from the action impl. 2180 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2181 2182 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2183 /// literal was successfully completed. ^(int x){...} 2184 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2185 Stmt *Body, Scope *CurScope); 2186 2187 //===---------------------------- C++ Features --------------------------===// 2188 2189 // Act on C++ namespaces 2190 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2191 SourceLocation IdentLoc, 2192 IdentifierInfo *Ident, 2193 SourceLocation LBrace, 2194 AttributeList *AttrList); 2195 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2196 2197 NamespaceDecl *getStdNamespace() const; 2198 NamespaceDecl *getOrCreateStdNamespace(); 2199 2200 CXXRecordDecl *getStdBadAlloc() const; 2201 2202 Decl *ActOnUsingDirective(Scope *CurScope, 2203 SourceLocation UsingLoc, 2204 SourceLocation NamespcLoc, 2205 CXXScopeSpec &SS, 2206 SourceLocation IdentLoc, 2207 IdentifierInfo *NamespcName, 2208 AttributeList *AttrList); 2209 2210 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2211 2212 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2213 SourceLocation NamespaceLoc, 2214 SourceLocation AliasLoc, 2215 IdentifierInfo *Alias, 2216 CXXScopeSpec &SS, 2217 SourceLocation IdentLoc, 2218 IdentifierInfo *Ident); 2219 2220 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2221 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2222 const LookupResult &PreviousDecls); 2223 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2224 NamedDecl *Target); 2225 2226 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2227 bool isTypeName, 2228 const CXXScopeSpec &SS, 2229 SourceLocation NameLoc, 2230 const LookupResult &Previous); 2231 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2232 const CXXScopeSpec &SS, 2233 SourceLocation NameLoc); 2234 2235 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2236 SourceLocation UsingLoc, 2237 CXXScopeSpec &SS, 2238 const DeclarationNameInfo &NameInfo, 2239 AttributeList *AttrList, 2240 bool IsInstantiation, 2241 bool IsTypeName, 2242 SourceLocation TypenameLoc); 2243 2244 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2245 2246 Decl *ActOnUsingDeclaration(Scope *CurScope, 2247 AccessSpecifier AS, 2248 bool HasUsingKeyword, 2249 SourceLocation UsingLoc, 2250 CXXScopeSpec &SS, 2251 UnqualifiedId &Name, 2252 AttributeList *AttrList, 2253 bool IsTypeName, 2254 SourceLocation TypenameLoc); 2255 2256 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2257 /// ActOnDeclarator, when a C++ direct initializer is present. 2258 /// e.g: "int x(1);" 2259 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2260 SourceLocation LParenLoc, 2261 MultiExprArg Exprs, 2262 SourceLocation RParenLoc, 2263 bool TypeMayContainAuto); 2264 2265 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2266 /// and sets it as the initializer for the the passed in VarDecl. 2267 bool InitializeVarWithConstructor(VarDecl *VD, 2268 CXXConstructorDecl *Constructor, 2269 MultiExprArg Exprs); 2270 2271 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2272 /// including handling of its default argument expressions. 2273 /// 2274 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2275 ExprResult 2276 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2277 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2278 bool RequiresZeroInit, unsigned ConstructKind, 2279 SourceRange ParenRange); 2280 2281 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2282 // the constructor can be elidable? 2283 ExprResult 2284 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2285 CXXConstructorDecl *Constructor, bool Elidable, 2286 MultiExprArg Exprs, bool RequiresZeroInit, 2287 unsigned ConstructKind, 2288 SourceRange ParenRange); 2289 2290 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2291 /// the default expr if needed. 2292 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2293 FunctionDecl *FD, 2294 ParmVarDecl *Param); 2295 2296 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2297 /// constructed variable. 2298 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2299 2300 /// \brief Declare the implicit default constructor for the given class. 2301 /// 2302 /// \param ClassDecl The class declaration into which the implicit 2303 /// default constructor will be added. 2304 /// 2305 /// \returns The implicitly-declared default constructor. 2306 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2307 CXXRecordDecl *ClassDecl); 2308 2309 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2310 /// defining this constructor as the default constructor. 2311 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2312 CXXConstructorDecl *Constructor); 2313 2314 /// \brief Declare the implicit destructor for the given class. 2315 /// 2316 /// \param ClassDecl The class declaration into which the implicit 2317 /// destructor will be added. 2318 /// 2319 /// \returns The implicitly-declared destructor. 2320 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2321 2322 /// DefineImplicitDestructor - Checks for feasibility of 2323 /// defining this destructor as the default destructor. 2324 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2325 CXXDestructorDecl *Destructor); 2326 2327 /// \brief Declare all inherited constructors for the given class. 2328 /// 2329 /// \param ClassDecl The class declaration into which the inherited 2330 /// constructors will be added. 2331 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2332 2333 /// \brief Declare the implicit copy constructor for the given class. 2334 /// 2335 /// \param S The scope of the class, which may be NULL if this is a 2336 /// template instantiation. 2337 /// 2338 /// \param ClassDecl The class declaration into which the implicit 2339 /// copy constructor will be added. 2340 /// 2341 /// \returns The implicitly-declared copy constructor. 2342 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2343 2344 /// DefineImplicitCopyConstructor - Checks for feasibility of 2345 /// defining this constructor as the copy constructor. 2346 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2347 CXXConstructorDecl *Constructor, 2348 unsigned TypeQuals); 2349 2350 /// \brief Declare the implicit copy assignment operator for the given class. 2351 /// 2352 /// \param S The scope of the class, which may be NULL if this is a 2353 /// template instantiation. 2354 /// 2355 /// \param ClassDecl The class declaration into which the implicit 2356 /// copy-assignment operator will be added. 2357 /// 2358 /// \returns The implicitly-declared copy assignment operator. 2359 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2360 2361 /// \brief Defined an implicitly-declared copy assignment operator. 2362 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2363 CXXMethodDecl *MethodDecl); 2364 2365 /// \brief Force the declaration of any implicitly-declared members of this 2366 /// class. 2367 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2368 2369 /// MaybeBindToTemporary - If the passed in expression has a record type with 2370 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2371 /// it simply returns the passed in expression. 2372 ExprResult MaybeBindToTemporary(Expr *E); 2373 2374 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2375 MultiExprArg ArgsPtr, 2376 SourceLocation Loc, 2377 ASTOwningVector<Expr*> &ConvertedArgs); 2378 2379 ParsedType getDestructorName(SourceLocation TildeLoc, 2380 IdentifierInfo &II, SourceLocation NameLoc, 2381 Scope *S, CXXScopeSpec &SS, 2382 ParsedType ObjectType, 2383 bool EnteringContext); 2384 2385 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2386 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2387 tok::TokenKind Kind, 2388 SourceLocation LAngleBracketLoc, 2389 ParsedType Ty, 2390 SourceLocation RAngleBracketLoc, 2391 SourceLocation LParenLoc, 2392 Expr *E, 2393 SourceLocation RParenLoc); 2394 2395 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2396 tok::TokenKind Kind, 2397 TypeSourceInfo *Ty, 2398 Expr *E, 2399 SourceRange AngleBrackets, 2400 SourceRange Parens); 2401 2402 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2403 SourceLocation TypeidLoc, 2404 TypeSourceInfo *Operand, 2405 SourceLocation RParenLoc); 2406 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2407 SourceLocation TypeidLoc, 2408 Expr *Operand, 2409 SourceLocation RParenLoc); 2410 2411 /// ActOnCXXTypeid - Parse typeid( something ). 2412 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2413 SourceLocation LParenLoc, bool isType, 2414 void *TyOrExpr, 2415 SourceLocation RParenLoc); 2416 2417 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2418 SourceLocation TypeidLoc, 2419 TypeSourceInfo *Operand, 2420 SourceLocation RParenLoc); 2421 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2422 SourceLocation TypeidLoc, 2423 Expr *Operand, 2424 SourceLocation RParenLoc); 2425 2426 /// ActOnCXXUuidof - Parse __uuidof( something ). 2427 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2428 SourceLocation LParenLoc, bool isType, 2429 void *TyOrExpr, 2430 SourceLocation RParenLoc); 2431 2432 2433 //// ActOnCXXThis - Parse 'this' pointer. 2434 ExprResult ActOnCXXThis(SourceLocation loc); 2435 2436 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2437 /// pointer to an instance method whose 'this' pointer is 2438 /// capturable, or null if this is not possible. 2439 CXXMethodDecl *tryCaptureCXXThis(); 2440 2441 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2442 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2443 2444 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2445 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2446 2447 //// ActOnCXXThrow - Parse throw expressions. 2448 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2449 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E); 2450 2451 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2452 /// Can be interpreted either as function-style casting ("int(x)") 2453 /// or class type construction ("ClassType(x,y,z)") 2454 /// or creation of a value-initialized type ("int()"). 2455 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2456 SourceLocation LParenLoc, 2457 MultiExprArg Exprs, 2458 SourceLocation RParenLoc); 2459 2460 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2461 SourceLocation LParenLoc, 2462 MultiExprArg Exprs, 2463 SourceLocation RParenLoc); 2464 2465 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2466 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2467 SourceLocation PlacementLParen, 2468 MultiExprArg PlacementArgs, 2469 SourceLocation PlacementRParen, 2470 SourceRange TypeIdParens, Declarator &D, 2471 SourceLocation ConstructorLParen, 2472 MultiExprArg ConstructorArgs, 2473 SourceLocation ConstructorRParen); 2474 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2475 SourceLocation PlacementLParen, 2476 MultiExprArg PlacementArgs, 2477 SourceLocation PlacementRParen, 2478 SourceRange TypeIdParens, 2479 QualType AllocType, 2480 TypeSourceInfo *AllocTypeInfo, 2481 Expr *ArraySize, 2482 SourceLocation ConstructorLParen, 2483 MultiExprArg ConstructorArgs, 2484 SourceLocation ConstructorRParen, 2485 bool TypeMayContainAuto = true); 2486 2487 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2488 SourceRange R); 2489 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2490 bool UseGlobal, QualType AllocType, bool IsArray, 2491 Expr **PlaceArgs, unsigned NumPlaceArgs, 2492 FunctionDecl *&OperatorNew, 2493 FunctionDecl *&OperatorDelete); 2494 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2495 DeclarationName Name, Expr** Args, 2496 unsigned NumArgs, DeclContext *Ctx, 2497 bool AllowMissing, FunctionDecl *&Operator); 2498 void DeclareGlobalNewDelete(); 2499 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2500 QualType Argument, 2501 bool addMallocAttr = false); 2502 2503 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2504 DeclarationName Name, FunctionDecl* &Operator); 2505 2506 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2507 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2508 bool UseGlobal, bool ArrayForm, 2509 Expr *Operand); 2510 2511 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2512 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2513 SourceLocation StmtLoc, 2514 bool ConvertToBoolean); 2515 2516 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2517 Expr *Operand, SourceLocation RParen); 2518 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2519 SourceLocation RParen); 2520 2521 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2522 /// pseudo-functions. 2523 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2524 SourceLocation KWLoc, 2525 ParsedType Ty, 2526 SourceLocation RParen); 2527 2528 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2529 SourceLocation KWLoc, 2530 TypeSourceInfo *T, 2531 SourceLocation RParen); 2532 2533 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2534 /// pseudo-functions. 2535 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2536 SourceLocation KWLoc, 2537 ParsedType LhsTy, 2538 ParsedType RhsTy, 2539 SourceLocation RParen); 2540 2541 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2542 SourceLocation KWLoc, 2543 TypeSourceInfo *LhsT, 2544 TypeSourceInfo *RhsT, 2545 SourceLocation RParen); 2546 2547 ExprResult ActOnStartCXXMemberReference(Scope *S, 2548 Expr *Base, 2549 SourceLocation OpLoc, 2550 tok::TokenKind OpKind, 2551 ParsedType &ObjectType, 2552 bool &MayBePseudoDestructor); 2553 2554 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2555 2556 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2557 SourceLocation OpLoc, 2558 tok::TokenKind OpKind, 2559 const CXXScopeSpec &SS, 2560 TypeSourceInfo *ScopeType, 2561 SourceLocation CCLoc, 2562 SourceLocation TildeLoc, 2563 PseudoDestructorTypeStorage DestroyedType, 2564 bool HasTrailingLParen); 2565 2566 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2567 SourceLocation OpLoc, 2568 tok::TokenKind OpKind, 2569 CXXScopeSpec &SS, 2570 UnqualifiedId &FirstTypeName, 2571 SourceLocation CCLoc, 2572 SourceLocation TildeLoc, 2573 UnqualifiedId &SecondTypeName, 2574 bool HasTrailingLParen); 2575 2576 /// MaybeCreateExprWithCleanups - If the current full-expression 2577 /// requires any cleanups, surround it with a ExprWithCleanups node. 2578 /// Otherwise, just returns the passed-in expression. 2579 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2580 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2581 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2582 2583 ExprResult ActOnFinishFullExpr(Expr *Expr); 2584 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2585 2586 // Marks SS invalid if it represents an incomplete type. 2587 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2588 2589 DeclContext *computeDeclContext(QualType T); 2590 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2591 bool EnteringContext = false); 2592 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2593 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2594 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2595 2596 /// \brief The parser has parsed a global nested-name-specifier '::'. 2597 /// 2598 /// \param S The scope in which this nested-name-specifier occurs. 2599 /// 2600 /// \param CCLoc The location of the '::'. 2601 /// 2602 /// \param SS The nested-name-specifier, which will be updated in-place 2603 /// to reflect the parsed nested-name-specifier. 2604 /// 2605 /// \returns true if an error occurred, false otherwise. 2606 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2607 CXXScopeSpec &SS); 2608 2609 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2610 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2611 2612 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2613 SourceLocation IdLoc, 2614 IdentifierInfo &II, 2615 ParsedType ObjectType); 2616 2617 bool BuildCXXNestedNameSpecifier(Scope *S, 2618 IdentifierInfo &Identifier, 2619 SourceLocation IdentifierLoc, 2620 SourceLocation CCLoc, 2621 QualType ObjectType, 2622 bool EnteringContext, 2623 CXXScopeSpec &SS, 2624 NamedDecl *ScopeLookupResult, 2625 bool ErrorRecoveryLookup); 2626 2627 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2628 /// 2629 /// \param S The scope in which this nested-name-specifier occurs. 2630 /// 2631 /// \param Identifier The identifier preceding the '::'. 2632 /// 2633 /// \param IdentifierLoc The location of the identifier. 2634 /// 2635 /// \param CCLoc The location of the '::'. 2636 /// 2637 /// \param ObjectType The type of the object, if we're parsing 2638 /// nested-name-specifier in a member access expression. 2639 /// 2640 /// \param EnteringContext Whether we're entering the context nominated by 2641 /// this nested-name-specifier. 2642 /// 2643 /// \param SS The nested-name-specifier, which is both an input 2644 /// parameter (the nested-name-specifier before this type) and an 2645 /// output parameter (containing the full nested-name-specifier, 2646 /// including this new type). 2647 /// 2648 /// \returns true if an error occurred, false otherwise. 2649 bool ActOnCXXNestedNameSpecifier(Scope *S, 2650 IdentifierInfo &Identifier, 2651 SourceLocation IdentifierLoc, 2652 SourceLocation CCLoc, 2653 ParsedType ObjectType, 2654 bool EnteringContext, 2655 CXXScopeSpec &SS); 2656 2657 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2658 IdentifierInfo &Identifier, 2659 SourceLocation IdentifierLoc, 2660 SourceLocation ColonLoc, 2661 ParsedType ObjectType, 2662 bool EnteringContext); 2663 2664 /// \brief The parser has parsed a nested-name-specifier 2665 /// 'template[opt] template-name < template-args >::'. 2666 /// 2667 /// \param S The scope in which this nested-name-specifier occurs. 2668 /// 2669 /// \param TemplateLoc The location of the 'template' keyword, if any. 2670 /// 2671 /// \param SS The nested-name-specifier, which is both an input 2672 /// parameter (the nested-name-specifier before this type) and an 2673 /// output parameter (containing the full nested-name-specifier, 2674 /// including this new type). 2675 /// 2676 /// \param TemplateLoc the location of the 'template' keyword, if any. 2677 /// \param TemplateName The template name. 2678 /// \param TemplateNameLoc The location of the template name. 2679 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2680 /// \param TemplateArgs The template arguments. 2681 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2682 /// \param CCLoc The location of the '::'. 2683 2684 /// \param EnteringContext Whether we're entering the context of the 2685 /// nested-name-specifier. 2686 /// 2687 /// 2688 /// \returns true if an error occurred, false otherwise. 2689 bool ActOnCXXNestedNameSpecifier(Scope *S, 2690 SourceLocation TemplateLoc, 2691 CXXScopeSpec &SS, 2692 TemplateTy Template, 2693 SourceLocation TemplateNameLoc, 2694 SourceLocation LAngleLoc, 2695 ASTTemplateArgsPtr TemplateArgs, 2696 SourceLocation RAngleLoc, 2697 SourceLocation CCLoc, 2698 bool EnteringContext); 2699 2700 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2701 /// that the parser can use later to reconstruct the given 2702 /// nested-name-specifier. 2703 /// 2704 /// \param SS A nested-name-specifier. 2705 /// 2706 /// \returns A pointer containing all of the information in the 2707 /// nested-name-specifier \p SS. 2708 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2709 2710 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2711 /// the nested-name-specifier structure. 2712 /// 2713 /// \param Annotation The annotation pointer, produced by 2714 /// \c SaveNestedNameSpecifierAnnotation(). 2715 /// 2716 /// \param AnnotationRange The source range corresponding to the annotation. 2717 /// 2718 /// \param SS The nested-name-specifier that will be updated with the contents 2719 /// of the annotation pointer. 2720 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2721 SourceRange AnnotationRange, 2722 CXXScopeSpec &SS); 2723 2724 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2725 2726 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2727 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2728 /// After this method is called, according to [C++ 3.4.3p3], names should be 2729 /// looked up in the declarator-id's scope, until the declarator is parsed and 2730 /// ActOnCXXExitDeclaratorScope is called. 2731 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2732 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2733 2734 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2735 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2736 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2737 /// Used to indicate that names should revert to being looked up in the 2738 /// defining scope. 2739 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2740 2741 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2742 /// initializer for the declaration 'Dcl'. 2743 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2744 /// static data member of class X, names should be looked up in the scope of 2745 /// class X. 2746 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2747 2748 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2749 /// initializer for the declaration 'Dcl'. 2750 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2751 2752 // ParseObjCStringLiteral - Parse Objective-C string literals. 2753 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2754 Expr **Strings, 2755 unsigned NumStrings); 2756 2757 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2758 TypeSourceInfo *EncodedTypeInfo, 2759 SourceLocation RParenLoc); 2760 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2761 CXXMethodDecl *Method); 2762 2763 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2764 SourceLocation EncodeLoc, 2765 SourceLocation LParenLoc, 2766 ParsedType Ty, 2767 SourceLocation RParenLoc); 2768 2769 // ParseObjCSelectorExpression - Build selector expression for @selector 2770 ExprResult ParseObjCSelectorExpression(Selector Sel, 2771 SourceLocation AtLoc, 2772 SourceLocation SelLoc, 2773 SourceLocation LParenLoc, 2774 SourceLocation RParenLoc); 2775 2776 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2777 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2778 SourceLocation AtLoc, 2779 SourceLocation ProtoLoc, 2780 SourceLocation LParenLoc, 2781 SourceLocation RParenLoc); 2782 2783 //===--------------------------------------------------------------------===// 2784 // C++ Declarations 2785 // 2786 Decl *ActOnStartLinkageSpecification(Scope *S, 2787 SourceLocation ExternLoc, 2788 SourceLocation LangLoc, 2789 llvm::StringRef Lang, 2790 SourceLocation LBraceLoc); 2791 Decl *ActOnFinishLinkageSpecification(Scope *S, 2792 Decl *LinkageSpec, 2793 SourceLocation RBraceLoc); 2794 2795 2796 //===--------------------------------------------------------------------===// 2797 // C++ Classes 2798 // 2799 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2800 const CXXScopeSpec *SS = 0); 2801 2802 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2803 SourceLocation ASLoc, 2804 SourceLocation ColonLoc); 2805 2806 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2807 Declarator &D, 2808 MultiTemplateParamsArg TemplateParameterLists, 2809 Expr *BitfieldWidth, const VirtSpecifiers &VS, 2810 Expr *Init, bool IsDefinition, 2811 bool Deleted = false); 2812 2813 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2814 Scope *S, 2815 CXXScopeSpec &SS, 2816 IdentifierInfo *MemberOrBase, 2817 ParsedType TemplateTypeTy, 2818 SourceLocation IdLoc, 2819 SourceLocation LParenLoc, 2820 Expr **Args, unsigned NumArgs, 2821 SourceLocation RParenLoc, 2822 SourceLocation EllipsisLoc); 2823 2824 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2825 unsigned NumArgs, SourceLocation IdLoc, 2826 SourceLocation LParenLoc, 2827 SourceLocation RParenLoc); 2828 2829 MemInitResult BuildBaseInitializer(QualType BaseType, 2830 TypeSourceInfo *BaseTInfo, 2831 Expr **Args, unsigned NumArgs, 2832 SourceLocation LParenLoc, 2833 SourceLocation RParenLoc, 2834 CXXRecordDecl *ClassDecl, 2835 SourceLocation EllipsisLoc); 2836 2837 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 2838 Expr **Args, unsigned NumArgs, 2839 SourceLocation BaseLoc, 2840 SourceLocation RParenLoc, 2841 SourceLocation LParenLoc, 2842 CXXRecordDecl *ClassDecl); 2843 2844 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 2845 CXXCtorInitializer **Initializers, 2846 unsigned NumInitializers, bool AnyErrors); 2847 2848 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2849 2850 2851 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2852 /// mark all the non-trivial destructors of its members and bases as 2853 /// referenced. 2854 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2855 CXXRecordDecl *Record); 2856 2857 /// \brief The list of classes whose vtables have been used within 2858 /// this translation unit, and the source locations at which the 2859 /// first use occurred. 2860 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2861 2862 /// \brief The list of vtables that are required but have not yet been 2863 /// materialized. 2864 llvm::SmallVector<VTableUse, 16> VTableUses; 2865 2866 /// \brief The set of classes whose vtables have been used within 2867 /// this translation unit, and a bit that will be true if the vtable is 2868 /// required to be emitted (otherwise, it should be emitted only if needed 2869 /// by code generation). 2870 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2871 2872 /// \brief A list of all of the dynamic classes in this translation 2873 /// unit. 2874 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2875 2876 /// \brief Note that the vtable for the given class was used at the 2877 /// given location. 2878 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2879 bool DefinitionRequired = false); 2880 2881 /// MarkVirtualMembersReferenced - Will mark all members of the given 2882 /// CXXRecordDecl referenced. 2883 void MarkVirtualMembersReferenced(SourceLocation Loc, 2884 const CXXRecordDecl *RD); 2885 2886 /// \brief Define all of the vtables that have been used in this 2887 /// translation unit and reference any virtual members used by those 2888 /// vtables. 2889 /// 2890 /// \returns true if any work was done, false otherwise. 2891 bool DefineUsedVTables(); 2892 2893 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2894 2895 void ActOnMemInitializers(Decl *ConstructorDecl, 2896 SourceLocation ColonLoc, 2897 MemInitTy **MemInits, unsigned NumMemInits, 2898 bool AnyErrors); 2899 2900 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2901 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2902 Decl *TagDecl, 2903 SourceLocation LBrac, 2904 SourceLocation RBrac, 2905 AttributeList *AttrList); 2906 2907 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2908 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2909 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2910 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2911 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2912 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2913 2914 Decl *ActOnStaticAssertDeclaration(SourceLocation AssertLoc, 2915 Expr *AssertExpr, 2916 Expr *AssertMessageExpr); 2917 2918 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2919 TypeSourceInfo *TSInfo); 2920 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2921 MultiTemplateParamsArg TemplateParams); 2922 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2923 MultiTemplateParamsArg TemplateParams); 2924 2925 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2926 StorageClass& SC); 2927 void CheckConstructor(CXXConstructorDecl *Constructor); 2928 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2929 StorageClass& SC); 2930 bool CheckDestructor(CXXDestructorDecl *Destructor); 2931 void CheckConversionDeclarator(Declarator &D, QualType &R, 2932 StorageClass& SC); 2933 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2934 2935 //===--------------------------------------------------------------------===// 2936 // C++ Derived Classes 2937 // 2938 2939 /// ActOnBaseSpecifier - Parsed a base specifier 2940 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2941 SourceRange SpecifierRange, 2942 bool Virtual, AccessSpecifier Access, 2943 TypeSourceInfo *TInfo, 2944 SourceLocation EllipsisLoc); 2945 2946 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2947 SourceRange SpecifierRange, 2948 bool Virtual, AccessSpecifier Access, 2949 ParsedType basetype, 2950 SourceLocation BaseLoc, 2951 SourceLocation EllipsisLoc); 2952 2953 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2954 unsigned NumBases); 2955 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 2956 2957 bool IsDerivedFrom(QualType Derived, QualType Base); 2958 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 2959 2960 // FIXME: I don't like this name. 2961 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 2962 2963 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 2964 2965 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2966 SourceLocation Loc, SourceRange Range, 2967 CXXCastPath *BasePath = 0, 2968 bool IgnoreAccess = false); 2969 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2970 unsigned InaccessibleBaseID, 2971 unsigned AmbigiousBaseConvID, 2972 SourceLocation Loc, SourceRange Range, 2973 DeclarationName Name, 2974 CXXCastPath *BasePath); 2975 2976 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 2977 2978 /// CheckOverridingFunctionReturnType - Checks whether the return types are 2979 /// covariant, according to C++ [class.virtual]p5. 2980 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 2981 const CXXMethodDecl *Old); 2982 2983 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 2984 /// spec is a subset of base spec. 2985 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 2986 const CXXMethodDecl *Old); 2987 2988 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 2989 2990 /// CheckOverrideControl - Check C++0x override control semantics. 2991 void CheckOverrideControl(const Decl *D); 2992 2993 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 2994 /// overrides a virtual member function marked 'final', according to 2995 /// C++0x [class.virtual]p3. 2996 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 2997 const CXXMethodDecl *Old); 2998 2999 3000 //===--------------------------------------------------------------------===// 3001 // C++ Access Control 3002 // 3003 3004 enum AccessResult { 3005 AR_accessible, 3006 AR_inaccessible, 3007 AR_dependent, 3008 AR_delayed 3009 }; 3010 3011 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3012 NamedDecl *PrevMemberDecl, 3013 AccessSpecifier LexicalAS); 3014 3015 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3016 DeclAccessPair FoundDecl); 3017 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3018 DeclAccessPair FoundDecl); 3019 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3020 SourceRange PlacementRange, 3021 CXXRecordDecl *NamingClass, 3022 DeclAccessPair FoundDecl); 3023 AccessResult CheckConstructorAccess(SourceLocation Loc, 3024 CXXConstructorDecl *D, 3025 const InitializedEntity &Entity, 3026 AccessSpecifier Access, 3027 bool IsCopyBindingRefToTemp = false); 3028 AccessResult CheckDestructorAccess(SourceLocation Loc, 3029 CXXDestructorDecl *Dtor, 3030 const PartialDiagnostic &PDiag); 3031 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3032 NamedDecl *D, 3033 const PartialDiagnostic &PDiag); 3034 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3035 Expr *ObjectExpr, 3036 Expr *ArgExpr, 3037 DeclAccessPair FoundDecl); 3038 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3039 DeclAccessPair FoundDecl); 3040 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3041 QualType Base, QualType Derived, 3042 const CXXBasePath &Path, 3043 unsigned DiagID, 3044 bool ForceCheck = false, 3045 bool ForceUnprivileged = false); 3046 void CheckLookupAccess(const LookupResult &R); 3047 3048 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3049 const MultiLevelTemplateArgumentList &TemplateArgs); 3050 void PerformDependentDiagnostics(const DeclContext *Pattern, 3051 const MultiLevelTemplateArgumentList &TemplateArgs); 3052 3053 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3054 3055 /// A flag to suppress access checking. 3056 bool SuppressAccessChecking; 3057 3058 /// \brief When true, access checking violations are treated as SFINAE 3059 /// failures rather than hard errors. 3060 bool AccessCheckingSFINAE; 3061 3062 void ActOnStartSuppressingAccessChecks(); 3063 void ActOnStopSuppressingAccessChecks(); 3064 3065 enum AbstractDiagSelID { 3066 AbstractNone = -1, 3067 AbstractReturnType, 3068 AbstractParamType, 3069 AbstractVariableType, 3070 AbstractFieldType, 3071 AbstractArrayType 3072 }; 3073 3074 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3075 const PartialDiagnostic &PD); 3076 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3077 3078 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3079 AbstractDiagSelID SelID = AbstractNone); 3080 3081 //===--------------------------------------------------------------------===// 3082 // C++ Overloaded Operators [C++ 13.5] 3083 // 3084 3085 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3086 3087 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3088 3089 //===--------------------------------------------------------------------===// 3090 // C++ Templates [C++ 14] 3091 // 3092 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3093 QualType ObjectType, bool EnteringContext, 3094 bool &MemberOfUnknownSpecialization); 3095 3096 TemplateNameKind isTemplateName(Scope *S, 3097 CXXScopeSpec &SS, 3098 bool hasTemplateKeyword, 3099 UnqualifiedId &Name, 3100 ParsedType ObjectType, 3101 bool EnteringContext, 3102 TemplateTy &Template, 3103 bool &MemberOfUnknownSpecialization); 3104 3105 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3106 SourceLocation IILoc, 3107 Scope *S, 3108 const CXXScopeSpec *SS, 3109 TemplateTy &SuggestedTemplate, 3110 TemplateNameKind &SuggestedKind); 3111 3112 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3113 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3114 3115 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3116 SourceLocation EllipsisLoc, 3117 SourceLocation KeyLoc, 3118 IdentifierInfo *ParamName, 3119 SourceLocation ParamNameLoc, 3120 unsigned Depth, unsigned Position, 3121 SourceLocation EqualLoc, 3122 ParsedType DefaultArg); 3123 3124 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3125 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3126 unsigned Depth, 3127 unsigned Position, 3128 SourceLocation EqualLoc, 3129 Expr *DefaultArg); 3130 Decl *ActOnTemplateTemplateParameter(Scope *S, 3131 SourceLocation TmpLoc, 3132 TemplateParamsTy *Params, 3133 SourceLocation EllipsisLoc, 3134 IdentifierInfo *ParamName, 3135 SourceLocation ParamNameLoc, 3136 unsigned Depth, 3137 unsigned Position, 3138 SourceLocation EqualLoc, 3139 ParsedTemplateArgument DefaultArg); 3140 3141 TemplateParamsTy * 3142 ActOnTemplateParameterList(unsigned Depth, 3143 SourceLocation ExportLoc, 3144 SourceLocation TemplateLoc, 3145 SourceLocation LAngleLoc, 3146 Decl **Params, unsigned NumParams, 3147 SourceLocation RAngleLoc); 3148 3149 /// \brief The context in which we are checking a template parameter 3150 /// list. 3151 enum TemplateParamListContext { 3152 TPC_ClassTemplate, 3153 TPC_FunctionTemplate, 3154 TPC_ClassTemplateMember, 3155 TPC_FriendFunctionTemplate, 3156 TPC_FriendFunctionTemplateDefinition 3157 }; 3158 3159 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3160 TemplateParameterList *OldParams, 3161 TemplateParamListContext TPC); 3162 TemplateParameterList * 3163 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3164 const CXXScopeSpec &SS, 3165 TemplateParameterList **ParamLists, 3166 unsigned NumParamLists, 3167 bool IsFriend, 3168 bool &IsExplicitSpecialization, 3169 bool &Invalid); 3170 3171 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3172 SourceLocation KWLoc, CXXScopeSpec &SS, 3173 IdentifierInfo *Name, SourceLocation NameLoc, 3174 AttributeList *Attr, 3175 TemplateParameterList *TemplateParams, 3176 AccessSpecifier AS); 3177 3178 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3179 TemplateArgumentListInfo &Out); 3180 3181 QualType CheckTemplateIdType(TemplateName Template, 3182 SourceLocation TemplateLoc, 3183 const TemplateArgumentListInfo &TemplateArgs); 3184 3185 TypeResult 3186 ActOnTemplateIdType(CXXScopeSpec &SS, 3187 TemplateTy Template, SourceLocation TemplateLoc, 3188 SourceLocation LAngleLoc, 3189 ASTTemplateArgsPtr TemplateArgs, 3190 SourceLocation RAngleLoc); 3191 3192 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3193 /// such as \c class T::template apply<U>. 3194 /// 3195 /// \param TUK 3196 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3197 TypeSpecifierType TagSpec, 3198 SourceLocation TagLoc, 3199 CXXScopeSpec &SS, 3200 TemplateTy TemplateD, 3201 SourceLocation TemplateLoc, 3202 SourceLocation LAngleLoc, 3203 ASTTemplateArgsPtr TemplateArgsIn, 3204 SourceLocation RAngleLoc); 3205 3206 3207 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3208 LookupResult &R, 3209 bool RequiresADL, 3210 const TemplateArgumentListInfo &TemplateArgs); 3211 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3212 const DeclarationNameInfo &NameInfo, 3213 const TemplateArgumentListInfo &TemplateArgs); 3214 3215 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3216 SourceLocation TemplateKWLoc, 3217 CXXScopeSpec &SS, 3218 UnqualifiedId &Name, 3219 ParsedType ObjectType, 3220 bool EnteringContext, 3221 TemplateTy &Template); 3222 3223 DeclResult 3224 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3225 SourceLocation KWLoc, 3226 CXXScopeSpec &SS, 3227 TemplateTy Template, 3228 SourceLocation TemplateNameLoc, 3229 SourceLocation LAngleLoc, 3230 ASTTemplateArgsPtr TemplateArgs, 3231 SourceLocation RAngleLoc, 3232 AttributeList *Attr, 3233 MultiTemplateParamsArg TemplateParameterLists); 3234 3235 Decl *ActOnTemplateDeclarator(Scope *S, 3236 MultiTemplateParamsArg TemplateParameterLists, 3237 Declarator &D); 3238 3239 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3240 MultiTemplateParamsArg TemplateParameterLists, 3241 Declarator &D); 3242 3243 bool 3244 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3245 TemplateSpecializationKind NewTSK, 3246 NamedDecl *PrevDecl, 3247 TemplateSpecializationKind PrevTSK, 3248 SourceLocation PrevPtOfInstantiation, 3249 bool &SuppressNew); 3250 3251 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3252 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3253 LookupResult &Previous); 3254 3255 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3256 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3257 LookupResult &Previous); 3258 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3259 3260 DeclResult 3261 ActOnExplicitInstantiation(Scope *S, 3262 SourceLocation ExternLoc, 3263 SourceLocation TemplateLoc, 3264 unsigned TagSpec, 3265 SourceLocation KWLoc, 3266 const CXXScopeSpec &SS, 3267 TemplateTy Template, 3268 SourceLocation TemplateNameLoc, 3269 SourceLocation LAngleLoc, 3270 ASTTemplateArgsPtr TemplateArgs, 3271 SourceLocation RAngleLoc, 3272 AttributeList *Attr); 3273 3274 DeclResult 3275 ActOnExplicitInstantiation(Scope *S, 3276 SourceLocation ExternLoc, 3277 SourceLocation TemplateLoc, 3278 unsigned TagSpec, 3279 SourceLocation KWLoc, 3280 CXXScopeSpec &SS, 3281 IdentifierInfo *Name, 3282 SourceLocation NameLoc, 3283 AttributeList *Attr); 3284 3285 DeclResult ActOnExplicitInstantiation(Scope *S, 3286 SourceLocation ExternLoc, 3287 SourceLocation TemplateLoc, 3288 Declarator &D); 3289 3290 TemplateArgumentLoc 3291 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3292 SourceLocation TemplateLoc, 3293 SourceLocation RAngleLoc, 3294 Decl *Param, 3295 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3296 3297 /// \brief Specifies the context in which a particular template 3298 /// argument is being checked. 3299 enum CheckTemplateArgumentKind { 3300 /// \brief The template argument was specified in the code or was 3301 /// instantiated with some deduced template arguments. 3302 CTAK_Specified, 3303 3304 /// \brief The template argument was deduced via template argument 3305 /// deduction. 3306 CTAK_Deduced, 3307 3308 /// \brief The template argument was deduced from an array bound 3309 /// via template argument deduction. 3310 CTAK_DeducedFromArrayBound 3311 }; 3312 3313 bool CheckTemplateArgument(NamedDecl *Param, 3314 const TemplateArgumentLoc &Arg, 3315 NamedDecl *Template, 3316 SourceLocation TemplateLoc, 3317 SourceLocation RAngleLoc, 3318 unsigned ArgumentPackIndex, 3319 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3320 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3321 3322 bool CheckTemplateArgumentList(TemplateDecl *Template, 3323 SourceLocation TemplateLoc, 3324 const TemplateArgumentListInfo &TemplateArgs, 3325 bool PartialTemplateArgs, 3326 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3327 3328 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3329 const TemplateArgumentLoc &Arg, 3330 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3331 3332 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3333 TypeSourceInfo *Arg); 3334 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3335 TemplateArgument &Converted); 3336 bool CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3337 QualType InstantiatedParamType, Expr *&Arg, 3338 TemplateArgument &Converted, 3339 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3340 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3341 const TemplateArgumentLoc &Arg); 3342 3343 ExprResult 3344 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3345 QualType ParamType, 3346 SourceLocation Loc); 3347 ExprResult 3348 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3349 SourceLocation Loc); 3350 3351 /// \brief Enumeration describing how template parameter lists are compared 3352 /// for equality. 3353 enum TemplateParameterListEqualKind { 3354 /// \brief We are matching the template parameter lists of two templates 3355 /// that might be redeclarations. 3356 /// 3357 /// \code 3358 /// template<typename T> struct X; 3359 /// template<typename T> struct X; 3360 /// \endcode 3361 TPL_TemplateMatch, 3362 3363 /// \brief We are matching the template parameter lists of two template 3364 /// template parameters as part of matching the template parameter lists 3365 /// of two templates that might be redeclarations. 3366 /// 3367 /// \code 3368 /// template<template<int I> class TT> struct X; 3369 /// template<template<int Value> class Other> struct X; 3370 /// \endcode 3371 TPL_TemplateTemplateParmMatch, 3372 3373 /// \brief We are matching the template parameter lists of a template 3374 /// template argument against the template parameter lists of a template 3375 /// template parameter. 3376 /// 3377 /// \code 3378 /// template<template<int Value> class Metafun> struct X; 3379 /// template<int Value> struct integer_c; 3380 /// X<integer_c> xic; 3381 /// \endcode 3382 TPL_TemplateTemplateArgumentMatch 3383 }; 3384 3385 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3386 TemplateParameterList *Old, 3387 bool Complain, 3388 TemplateParameterListEqualKind Kind, 3389 SourceLocation TemplateArgLoc 3390 = SourceLocation()); 3391 3392 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3393 3394 /// \brief Called when the parser has parsed a C++ typename 3395 /// specifier, e.g., "typename T::type". 3396 /// 3397 /// \param S The scope in which this typename type occurs. 3398 /// \param TypenameLoc the location of the 'typename' keyword 3399 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3400 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3401 /// \param IdLoc the location of the identifier. 3402 TypeResult 3403 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3404 const CXXScopeSpec &SS, const IdentifierInfo &II, 3405 SourceLocation IdLoc); 3406 3407 /// \brief Called when the parser has parsed a C++ typename 3408 /// specifier that ends in a template-id, e.g., 3409 /// "typename MetaFun::template apply<T1, T2>". 3410 /// 3411 /// \param S The scope in which this typename type occurs. 3412 /// \param TypenameLoc the location of the 'typename' keyword 3413 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3414 /// \param TemplateLoc the location of the 'template' keyword, if any. 3415 /// \param TemplateName The template name. 3416 /// \param TemplateNameLoc The location of the template name. 3417 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3418 /// \param TemplateArgs The template arguments. 3419 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3420 TypeResult 3421 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3422 const CXXScopeSpec &SS, 3423 SourceLocation TemplateLoc, 3424 TemplateTy Template, 3425 SourceLocation TemplateNameLoc, 3426 SourceLocation LAngleLoc, 3427 ASTTemplateArgsPtr TemplateArgs, 3428 SourceLocation RAngleLoc); 3429 3430 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3431 SourceLocation KeywordLoc, 3432 NestedNameSpecifierLoc QualifierLoc, 3433 const IdentifierInfo &II, 3434 SourceLocation IILoc); 3435 3436 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3437 SourceLocation Loc, 3438 DeclarationName Name); 3439 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3440 3441 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3442 3443 std::string 3444 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3445 const TemplateArgumentList &Args); 3446 3447 std::string 3448 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3449 const TemplateArgument *Args, 3450 unsigned NumArgs); 3451 3452 //===--------------------------------------------------------------------===// 3453 // C++ Variadic Templates (C++0x [temp.variadic]) 3454 //===--------------------------------------------------------------------===// 3455 3456 /// \brief The context in which an unexpanded parameter pack is 3457 /// being diagnosed. 3458 /// 3459 /// Note that the values of this enumeration line up with the first 3460 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3461 enum UnexpandedParameterPackContext { 3462 /// \brief An arbitrary expression. 3463 UPPC_Expression = 0, 3464 3465 /// \brief The base type of a class type. 3466 UPPC_BaseType, 3467 3468 /// \brief The type of an arbitrary declaration. 3469 UPPC_DeclarationType, 3470 3471 /// \brief The type of a data member. 3472 UPPC_DataMemberType, 3473 3474 /// \brief The size of a bit-field. 3475 UPPC_BitFieldWidth, 3476 3477 /// \brief The expression in a static assertion. 3478 UPPC_StaticAssertExpression, 3479 3480 /// \brief The fixed underlying type of an enumeration. 3481 UPPC_FixedUnderlyingType, 3482 3483 /// \brief The enumerator value. 3484 UPPC_EnumeratorValue, 3485 3486 /// \brief A using declaration. 3487 UPPC_UsingDeclaration, 3488 3489 /// \brief A friend declaration. 3490 UPPC_FriendDeclaration, 3491 3492 /// \brief A declaration qualifier. 3493 UPPC_DeclarationQualifier, 3494 3495 /// \brief An initializer. 3496 UPPC_Initializer, 3497 3498 /// \brief A default argument. 3499 UPPC_DefaultArgument, 3500 3501 /// \brief The type of a non-type template parameter. 3502 UPPC_NonTypeTemplateParameterType, 3503 3504 /// \brief The type of an exception. 3505 UPPC_ExceptionType, 3506 3507 /// \brief Partial specialization. 3508 UPPC_PartialSpecialization 3509 }; 3510 3511 /// \brief If the given type contains an unexpanded parameter pack, 3512 /// diagnose the error. 3513 /// 3514 /// \param Loc The source location where a diagnostc should be emitted. 3515 /// 3516 /// \param T The type that is being checked for unexpanded parameter 3517 /// packs. 3518 /// 3519 /// \returns true if an error ocurred, false otherwise. 3520 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3521 UnexpandedParameterPackContext UPPC); 3522 3523 /// \brief If the given expression contains an unexpanded parameter 3524 /// pack, diagnose the error. 3525 /// 3526 /// \param E The expression that is being checked for unexpanded 3527 /// parameter packs. 3528 /// 3529 /// \returns true if an error ocurred, false otherwise. 3530 bool DiagnoseUnexpandedParameterPack(Expr *E, 3531 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3532 3533 /// \brief If the given nested-name-specifier contains an unexpanded 3534 /// parameter pack, diagnose the error. 3535 /// 3536 /// \param SS The nested-name-specifier that is being checked for 3537 /// unexpanded parameter packs. 3538 /// 3539 /// \returns true if an error ocurred, false otherwise. 3540 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3541 UnexpandedParameterPackContext UPPC); 3542 3543 /// \brief If the given name contains an unexpanded parameter pack, 3544 /// diagnose the error. 3545 /// 3546 /// \param NameInfo The name (with source location information) that 3547 /// is being checked for unexpanded parameter packs. 3548 /// 3549 /// \returns true if an error ocurred, false otherwise. 3550 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3551 UnexpandedParameterPackContext UPPC); 3552 3553 /// \brief If the given template name contains an unexpanded parameter pack, 3554 /// diagnose the error. 3555 /// 3556 /// \param Loc The location of the template name. 3557 /// 3558 /// \param Template The template name that is being checked for unexpanded 3559 /// parameter packs. 3560 /// 3561 /// \returns true if an error ocurred, false otherwise. 3562 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3563 TemplateName Template, 3564 UnexpandedParameterPackContext UPPC); 3565 3566 /// \brief If the given template argument contains an unexpanded parameter 3567 /// pack, diagnose the error. 3568 /// 3569 /// \param Arg The template argument that is being checked for unexpanded 3570 /// parameter packs. 3571 /// 3572 /// \returns true if an error ocurred, false otherwise. 3573 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3574 UnexpandedParameterPackContext UPPC); 3575 3576 /// \brief Collect the set of unexpanded parameter packs within the given 3577 /// template argument. 3578 /// 3579 /// \param Arg The template argument that will be traversed to find 3580 /// unexpanded parameter packs. 3581 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3582 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3583 3584 /// \brief Collect the set of unexpanded parameter packs within the given 3585 /// template argument. 3586 /// 3587 /// \param Arg The template argument that will be traversed to find 3588 /// unexpanded parameter packs. 3589 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3590 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3591 3592 /// \brief Collect the set of unexpanded parameter packs within the given 3593 /// type. 3594 /// 3595 /// \param T The type that will be traversed to find 3596 /// unexpanded parameter packs. 3597 void collectUnexpandedParameterPacks(QualType T, 3598 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3599 3600 /// \brief Collect the set of unexpanded parameter packs within the given 3601 /// type. 3602 /// 3603 /// \param TL The type that will be traversed to find 3604 /// unexpanded parameter packs. 3605 void collectUnexpandedParameterPacks(TypeLoc TL, 3606 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3607 3608 /// \brief Invoked when parsing a template argument followed by an 3609 /// ellipsis, which creates a pack expansion. 3610 /// 3611 /// \param Arg The template argument preceding the ellipsis, which 3612 /// may already be invalid. 3613 /// 3614 /// \param EllipsisLoc The location of the ellipsis. 3615 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3616 SourceLocation EllipsisLoc); 3617 3618 /// \brief Invoked when parsing a type followed by an ellipsis, which 3619 /// creates a pack expansion. 3620 /// 3621 /// \param Type The type preceding the ellipsis, which will become 3622 /// the pattern of the pack expansion. 3623 /// 3624 /// \param EllipsisLoc The location of the ellipsis. 3625 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3626 3627 /// \brief Construct a pack expansion type from the pattern of the pack 3628 /// expansion. 3629 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3630 SourceLocation EllipsisLoc, 3631 llvm::Optional<unsigned> NumExpansions); 3632 3633 /// \brief Construct a pack expansion type from the pattern of the pack 3634 /// expansion. 3635 QualType CheckPackExpansion(QualType Pattern, 3636 SourceRange PatternRange, 3637 SourceLocation EllipsisLoc, 3638 llvm::Optional<unsigned> NumExpansions); 3639 3640 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3641 /// creates a pack expansion. 3642 /// 3643 /// \param Pattern The expression preceding the ellipsis, which will become 3644 /// the pattern of the pack expansion. 3645 /// 3646 /// \param EllipsisLoc The location of the ellipsis. 3647 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3648 3649 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3650 /// creates a pack expansion. 3651 /// 3652 /// \param Pattern The expression preceding the ellipsis, which will become 3653 /// the pattern of the pack expansion. 3654 /// 3655 /// \param EllipsisLoc The location of the ellipsis. 3656 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3657 llvm::Optional<unsigned> NumExpansions); 3658 3659 /// \brief Determine whether we could expand a pack expansion with the 3660 /// given set of parameter packs into separate arguments by repeatedly 3661 /// transforming the pattern. 3662 /// 3663 /// \param EllipsisLoc The location of the ellipsis that identifies the 3664 /// pack expansion. 3665 /// 3666 /// \param PatternRange The source range that covers the entire pattern of 3667 /// the pack expansion. 3668 /// 3669 /// \param Unexpanded The set of unexpanded parameter packs within the 3670 /// pattern. 3671 /// 3672 /// \param NumUnexpanded The number of unexpanded parameter packs in 3673 /// \p Unexpanded. 3674 /// 3675 /// \param ShouldExpand Will be set to \c true if the transformer should 3676 /// expand the corresponding pack expansions into separate arguments. When 3677 /// set, \c NumExpansions must also be set. 3678 /// 3679 /// \param RetainExpansion Whether the caller should add an unexpanded 3680 /// pack expansion after all of the expanded arguments. This is used 3681 /// when extending explicitly-specified template argument packs per 3682 /// C++0x [temp.arg.explicit]p9. 3683 /// 3684 /// \param NumExpansions The number of separate arguments that will be in 3685 /// the expanded form of the corresponding pack expansion. This is both an 3686 /// input and an output parameter, which can be set by the caller if the 3687 /// number of expansions is known a priori (e.g., due to a prior substitution) 3688 /// and will be set by the callee when the number of expansions is known. 3689 /// The callee must set this value when \c ShouldExpand is \c true; it may 3690 /// set this value in other cases. 3691 /// 3692 /// \returns true if an error occurred (e.g., because the parameter packs 3693 /// are to be instantiated with arguments of different lengths), false 3694 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3695 /// must be set. 3696 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3697 SourceRange PatternRange, 3698 const UnexpandedParameterPack *Unexpanded, 3699 unsigned NumUnexpanded, 3700 const MultiLevelTemplateArgumentList &TemplateArgs, 3701 bool &ShouldExpand, 3702 bool &RetainExpansion, 3703 llvm::Optional<unsigned> &NumExpansions); 3704 3705 /// \brief Determine the number of arguments in the given pack expansion 3706 /// type. 3707 /// 3708 /// This routine already assumes that the pack expansion type can be 3709 /// expanded and that the number of arguments in the expansion is 3710 /// consistent across all of the unexpanded parameter packs in its pattern. 3711 unsigned getNumArgumentsInExpansion(QualType T, 3712 const MultiLevelTemplateArgumentList &TemplateArgs); 3713 3714 /// \brief Determine whether the given declarator contains any unexpanded 3715 /// parameter packs. 3716 /// 3717 /// This routine is used by the parser to disambiguate function declarators 3718 /// with an ellipsis prior to the ')', e.g., 3719 /// 3720 /// \code 3721 /// void f(T...); 3722 /// \endcode 3723 /// 3724 /// To determine whether we have an (unnamed) function parameter pack or 3725 /// a variadic function. 3726 /// 3727 /// \returns true if the declarator contains any unexpanded parameter packs, 3728 /// false otherwise. 3729 bool containsUnexpandedParameterPacks(Declarator &D); 3730 3731 //===--------------------------------------------------------------------===// 3732 // C++ Template Argument Deduction (C++ [temp.deduct]) 3733 //===--------------------------------------------------------------------===// 3734 3735 /// \brief Describes the result of template argument deduction. 3736 /// 3737 /// The TemplateDeductionResult enumeration describes the result of 3738 /// template argument deduction, as returned from 3739 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3740 /// structure provides additional information about the results of 3741 /// template argument deduction, e.g., the deduced template argument 3742 /// list (if successful) or the specific template parameters or 3743 /// deduced arguments that were involved in the failure. 3744 enum TemplateDeductionResult { 3745 /// \brief Template argument deduction was successful. 3746 TDK_Success = 0, 3747 /// \brief Template argument deduction exceeded the maximum template 3748 /// instantiation depth (which has already been diagnosed). 3749 TDK_InstantiationDepth, 3750 /// \brief Template argument deduction did not deduce a value 3751 /// for every template parameter. 3752 TDK_Incomplete, 3753 /// \brief Template argument deduction produced inconsistent 3754 /// deduced values for the given template parameter. 3755 TDK_Inconsistent, 3756 /// \brief Template argument deduction failed due to inconsistent 3757 /// cv-qualifiers on a template parameter type that would 3758 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3759 /// but were given a non-const "X". 3760 TDK_Underqualified, 3761 /// \brief Substitution of the deduced template argument values 3762 /// resulted in an error. 3763 TDK_SubstitutionFailure, 3764 /// \brief Substitution of the deduced template argument values 3765 /// into a non-deduced context produced a type or value that 3766 /// produces a type that does not match the original template 3767 /// arguments provided. 3768 TDK_NonDeducedMismatch, 3769 /// \brief When performing template argument deduction for a function 3770 /// template, there were too many call arguments. 3771 TDK_TooManyArguments, 3772 /// \brief When performing template argument deduction for a function 3773 /// template, there were too few call arguments. 3774 TDK_TooFewArguments, 3775 /// \brief The explicitly-specified template arguments were not valid 3776 /// template arguments for the given template. 3777 TDK_InvalidExplicitArguments, 3778 /// \brief The arguments included an overloaded function name that could 3779 /// not be resolved to a suitable function. 3780 TDK_FailedOverloadResolution 3781 }; 3782 3783 TemplateDeductionResult 3784 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3785 const TemplateArgumentList &TemplateArgs, 3786 sema::TemplateDeductionInfo &Info); 3787 3788 TemplateDeductionResult 3789 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3790 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3791 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3792 llvm::SmallVectorImpl<QualType> &ParamTypes, 3793 QualType *FunctionType, 3794 sema::TemplateDeductionInfo &Info); 3795 3796 TemplateDeductionResult 3797 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3798 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3799 unsigned NumExplicitlySpecified, 3800 FunctionDecl *&Specialization, 3801 sema::TemplateDeductionInfo &Info); 3802 3803 TemplateDeductionResult 3804 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3805 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3806 Expr **Args, unsigned NumArgs, 3807 FunctionDecl *&Specialization, 3808 sema::TemplateDeductionInfo &Info); 3809 3810 TemplateDeductionResult 3811 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3812 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3813 QualType ArgFunctionType, 3814 FunctionDecl *&Specialization, 3815 sema::TemplateDeductionInfo &Info); 3816 3817 TemplateDeductionResult 3818 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3819 QualType ToType, 3820 CXXConversionDecl *&Specialization, 3821 sema::TemplateDeductionInfo &Info); 3822 3823 TemplateDeductionResult 3824 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3825 const TemplateArgumentListInfo *ExplicitTemplateArgs, 3826 FunctionDecl *&Specialization, 3827 sema::TemplateDeductionInfo &Info); 3828 3829 bool DeduceAutoType(QualType AutoType, Expr *Initializer, QualType &Result); 3830 3831 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3832 FunctionTemplateDecl *FT2, 3833 SourceLocation Loc, 3834 TemplatePartialOrderingContext TPOC, 3835 unsigned NumCallArguments); 3836 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3837 UnresolvedSetIterator SEnd, 3838 TemplatePartialOrderingContext TPOC, 3839 unsigned NumCallArguments, 3840 SourceLocation Loc, 3841 const PartialDiagnostic &NoneDiag, 3842 const PartialDiagnostic &AmbigDiag, 3843 const PartialDiagnostic &CandidateDiag, 3844 bool Complain = true); 3845 3846 ClassTemplatePartialSpecializationDecl * 3847 getMoreSpecializedPartialSpecialization( 3848 ClassTemplatePartialSpecializationDecl *PS1, 3849 ClassTemplatePartialSpecializationDecl *PS2, 3850 SourceLocation Loc); 3851 3852 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3853 bool OnlyDeduced, 3854 unsigned Depth, 3855 llvm::SmallVectorImpl<bool> &Used); 3856 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3857 llvm::SmallVectorImpl<bool> &Deduced); 3858 3859 //===--------------------------------------------------------------------===// 3860 // C++ Template Instantiation 3861 // 3862 3863 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3864 const TemplateArgumentList *Innermost = 0, 3865 bool RelativeToPrimary = false, 3866 const FunctionDecl *Pattern = 0); 3867 3868 /// \brief A template instantiation that is currently in progress. 3869 struct ActiveTemplateInstantiation { 3870 /// \brief The kind of template instantiation we are performing 3871 enum InstantiationKind { 3872 /// We are instantiating a template declaration. The entity is 3873 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3874 TemplateInstantiation, 3875 3876 /// We are instantiating a default argument for a template 3877 /// parameter. The Entity is the template, and 3878 /// TemplateArgs/NumTemplateArguments provides the template 3879 /// arguments as specified. 3880 /// FIXME: Use a TemplateArgumentList 3881 DefaultTemplateArgumentInstantiation, 3882 3883 /// We are instantiating a default argument for a function. 3884 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3885 /// provides the template arguments as specified. 3886 DefaultFunctionArgumentInstantiation, 3887 3888 /// We are substituting explicit template arguments provided for 3889 /// a function template. The entity is a FunctionTemplateDecl. 3890 ExplicitTemplateArgumentSubstitution, 3891 3892 /// We are substituting template argument determined as part of 3893 /// template argument deduction for either a class template 3894 /// partial specialization or a function template. The 3895 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3896 /// a FunctionTemplateDecl. 3897 DeducedTemplateArgumentSubstitution, 3898 3899 /// We are substituting prior template arguments into a new 3900 /// template parameter. The template parameter itself is either a 3901 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3902 PriorTemplateArgumentSubstitution, 3903 3904 /// We are checking the validity of a default template argument that 3905 /// has been used when naming a template-id. 3906 DefaultTemplateArgumentChecking 3907 } Kind; 3908 3909 /// \brief The point of instantiation within the source code. 3910 SourceLocation PointOfInstantiation; 3911 3912 /// \brief The template (or partial specialization) in which we are 3913 /// performing the instantiation, for substitutions of prior template 3914 /// arguments. 3915 NamedDecl *Template; 3916 3917 /// \brief The entity that is being instantiated. 3918 uintptr_t Entity; 3919 3920 /// \brief The list of template arguments we are substituting, if they 3921 /// are not part of the entity. 3922 const TemplateArgument *TemplateArgs; 3923 3924 /// \brief The number of template arguments in TemplateArgs. 3925 unsigned NumTemplateArgs; 3926 3927 /// \brief The template deduction info object associated with the 3928 /// substitution or checking of explicit or deduced template arguments. 3929 sema::TemplateDeductionInfo *DeductionInfo; 3930 3931 /// \brief The source range that covers the construct that cause 3932 /// the instantiation, e.g., the template-id that causes a class 3933 /// template instantiation. 3934 SourceRange InstantiationRange; 3935 3936 ActiveTemplateInstantiation() 3937 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 3938 NumTemplateArgs(0), DeductionInfo(0) {} 3939 3940 /// \brief Determines whether this template is an actual instantiation 3941 /// that should be counted toward the maximum instantiation depth. 3942 bool isInstantiationRecord() const; 3943 3944 friend bool operator==(const ActiveTemplateInstantiation &X, 3945 const ActiveTemplateInstantiation &Y) { 3946 if (X.Kind != Y.Kind) 3947 return false; 3948 3949 if (X.Entity != Y.Entity) 3950 return false; 3951 3952 switch (X.Kind) { 3953 case TemplateInstantiation: 3954 return true; 3955 3956 case PriorTemplateArgumentSubstitution: 3957 case DefaultTemplateArgumentChecking: 3958 if (X.Template != Y.Template) 3959 return false; 3960 3961 // Fall through 3962 3963 case DefaultTemplateArgumentInstantiation: 3964 case ExplicitTemplateArgumentSubstitution: 3965 case DeducedTemplateArgumentSubstitution: 3966 case DefaultFunctionArgumentInstantiation: 3967 return X.TemplateArgs == Y.TemplateArgs; 3968 3969 } 3970 3971 return true; 3972 } 3973 3974 friend bool operator!=(const ActiveTemplateInstantiation &X, 3975 const ActiveTemplateInstantiation &Y) { 3976 return !(X == Y); 3977 } 3978 }; 3979 3980 /// \brief List of active template instantiations. 3981 /// 3982 /// This vector is treated as a stack. As one template instantiation 3983 /// requires another template instantiation, additional 3984 /// instantiations are pushed onto the stack up to a 3985 /// user-configurable limit LangOptions::InstantiationDepth. 3986 llvm::SmallVector<ActiveTemplateInstantiation, 16> 3987 ActiveTemplateInstantiations; 3988 3989 /// \brief Whether we are in a SFINAE context that is not associated with 3990 /// template instantiation. 3991 /// 3992 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 3993 /// of a template instantiation or template argument deduction. 3994 bool InNonInstantiationSFINAEContext; 3995 3996 /// \brief The number of ActiveTemplateInstantiation entries in 3997 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 3998 /// therefore, should not be counted as part of the instantiation depth. 3999 unsigned NonInstantiationEntries; 4000 4001 /// \brief The last template from which a template instantiation 4002 /// error or warning was produced. 4003 /// 4004 /// This value is used to suppress printing of redundant template 4005 /// instantiation backtraces when there are multiple errors in the 4006 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4007 /// to implement it anywhere else. 4008 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4009 4010 /// \brief The current index into pack expansion arguments that will be 4011 /// used for substitution of parameter packs. 4012 /// 4013 /// The pack expansion index will be -1 to indicate that parameter packs 4014 /// should be instantiated as themselves. Otherwise, the index specifies 4015 /// which argument within the parameter pack will be used for substitution. 4016 int ArgumentPackSubstitutionIndex; 4017 4018 /// \brief RAII object used to change the argument pack substitution index 4019 /// within a \c Sema object. 4020 /// 4021 /// See \c ArgumentPackSubstitutionIndex for more information. 4022 class ArgumentPackSubstitutionIndexRAII { 4023 Sema &Self; 4024 int OldSubstitutionIndex; 4025 4026 public: 4027 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4028 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4029 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4030 } 4031 4032 ~ArgumentPackSubstitutionIndexRAII() { 4033 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4034 } 4035 }; 4036 4037 friend class ArgumentPackSubstitutionRAII; 4038 4039 /// \brief The stack of calls expression undergoing template instantiation. 4040 /// 4041 /// The top of this stack is used by a fixit instantiating unresolved 4042 /// function calls to fix the AST to match the textual change it prints. 4043 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4044 4045 /// \brief For each declaration that involved template argument deduction, the 4046 /// set of diagnostics that were suppressed during that template argument 4047 /// deduction. 4048 /// 4049 /// FIXME: Serialize this structure to the AST file. 4050 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4051 SuppressedDiagnostics; 4052 4053 /// \brief A stack object to be created when performing template 4054 /// instantiation. 4055 /// 4056 /// Construction of an object of type \c InstantiatingTemplate 4057 /// pushes the current instantiation onto the stack of active 4058 /// instantiations. If the size of this stack exceeds the maximum 4059 /// number of recursive template instantiations, construction 4060 /// produces an error and evaluates true. 4061 /// 4062 /// Destruction of this object will pop the named instantiation off 4063 /// the stack. 4064 struct InstantiatingTemplate { 4065 /// \brief Note that we are instantiating a class template, 4066 /// function template, or a member thereof. 4067 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4068 Decl *Entity, 4069 SourceRange InstantiationRange = SourceRange()); 4070 4071 /// \brief Note that we are instantiating a default argument in a 4072 /// template-id. 4073 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4074 TemplateDecl *Template, 4075 const TemplateArgument *TemplateArgs, 4076 unsigned NumTemplateArgs, 4077 SourceRange InstantiationRange = SourceRange()); 4078 4079 /// \brief Note that we are instantiating a default argument in a 4080 /// template-id. 4081 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4082 FunctionTemplateDecl *FunctionTemplate, 4083 const TemplateArgument *TemplateArgs, 4084 unsigned NumTemplateArgs, 4085 ActiveTemplateInstantiation::InstantiationKind Kind, 4086 sema::TemplateDeductionInfo &DeductionInfo, 4087 SourceRange InstantiationRange = SourceRange()); 4088 4089 /// \brief Note that we are instantiating as part of template 4090 /// argument deduction for a class template partial 4091 /// specialization. 4092 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4093 ClassTemplatePartialSpecializationDecl *PartialSpec, 4094 const TemplateArgument *TemplateArgs, 4095 unsigned NumTemplateArgs, 4096 sema::TemplateDeductionInfo &DeductionInfo, 4097 SourceRange InstantiationRange = SourceRange()); 4098 4099 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4100 ParmVarDecl *Param, 4101 const TemplateArgument *TemplateArgs, 4102 unsigned NumTemplateArgs, 4103 SourceRange InstantiationRange = SourceRange()); 4104 4105 /// \brief Note that we are substituting prior template arguments into a 4106 /// non-type or template template parameter. 4107 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4108 NamedDecl *Template, 4109 NonTypeTemplateParmDecl *Param, 4110 const TemplateArgument *TemplateArgs, 4111 unsigned NumTemplateArgs, 4112 SourceRange InstantiationRange); 4113 4114 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4115 NamedDecl *Template, 4116 TemplateTemplateParmDecl *Param, 4117 const TemplateArgument *TemplateArgs, 4118 unsigned NumTemplateArgs, 4119 SourceRange InstantiationRange); 4120 4121 /// \brief Note that we are checking the default template argument 4122 /// against the template parameter for a given template-id. 4123 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4124 TemplateDecl *Template, 4125 NamedDecl *Param, 4126 const TemplateArgument *TemplateArgs, 4127 unsigned NumTemplateArgs, 4128 SourceRange InstantiationRange); 4129 4130 4131 /// \brief Note that we have finished instantiating this template. 4132 void Clear(); 4133 4134 ~InstantiatingTemplate() { Clear(); } 4135 4136 /// \brief Determines whether we have exceeded the maximum 4137 /// recursive template instantiations. 4138 operator bool() const { return Invalid; } 4139 4140 private: 4141 Sema &SemaRef; 4142 bool Invalid; 4143 bool SavedInNonInstantiationSFINAEContext; 4144 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4145 SourceRange InstantiationRange); 4146 4147 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4148 4149 InstantiatingTemplate& 4150 operator=(const InstantiatingTemplate&); // not implemented 4151 }; 4152 4153 void PrintInstantiationStack(); 4154 4155 /// \brief Determines whether we are currently in a context where 4156 /// template argument substitution failures are not considered 4157 /// errors. 4158 /// 4159 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4160 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4161 /// template-deduction context object, which can be used to capture 4162 /// diagnostics that will be suppressed. 4163 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4164 4165 /// \brief RAII class used to determine whether SFINAE has 4166 /// trapped any errors that occur during template argument 4167 /// deduction.` 4168 class SFINAETrap { 4169 Sema &SemaRef; 4170 unsigned PrevSFINAEErrors; 4171 bool PrevInNonInstantiationSFINAEContext; 4172 bool PrevAccessCheckingSFINAE; 4173 4174 public: 4175 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4176 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4177 PrevInNonInstantiationSFINAEContext( 4178 SemaRef.InNonInstantiationSFINAEContext), 4179 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4180 { 4181 if (!SemaRef.isSFINAEContext()) 4182 SemaRef.InNonInstantiationSFINAEContext = true; 4183 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4184 } 4185 4186 ~SFINAETrap() { 4187 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4188 SemaRef.InNonInstantiationSFINAEContext 4189 = PrevInNonInstantiationSFINAEContext; 4190 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4191 } 4192 4193 /// \brief Determine whether any SFINAE errors have been trapped. 4194 bool hasErrorOccurred() const { 4195 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4196 } 4197 }; 4198 4199 /// \brief The current instantiation scope used to store local 4200 /// variables. 4201 LocalInstantiationScope *CurrentInstantiationScope; 4202 4203 /// \brief The number of typos corrected by CorrectTypo. 4204 unsigned TyposCorrected; 4205 4206 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4207 UnqualifiedTyposCorrectedMap; 4208 4209 /// \brief A cache containing the results of typo correction for unqualified 4210 /// name lookup. 4211 /// 4212 /// The string is the string that we corrected to (which may be empty, if 4213 /// there was no correction), while the boolean will be true when the 4214 /// string represents a keyword. 4215 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4216 4217 /// \brief Worker object for performing CFG-based warnings. 4218 sema::AnalysisBasedWarnings AnalysisWarnings; 4219 4220 /// \brief An entity for which implicit template instantiation is required. 4221 /// 4222 /// The source location associated with the declaration is the first place in 4223 /// the source code where the declaration was "used". It is not necessarily 4224 /// the point of instantiation (which will be either before or after the 4225 /// namespace-scope declaration that triggered this implicit instantiation), 4226 /// However, it is the location that diagnostics should generally refer to, 4227 /// because users will need to know what code triggered the instantiation. 4228 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4229 4230 /// \brief The queue of implicit template instantiations that are required 4231 /// but have not yet been performed. 4232 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4233 4234 /// \brief The queue of implicit template instantiations that are required 4235 /// and must be performed within the current local scope. 4236 /// 4237 /// This queue is only used for member functions of local classes in 4238 /// templates, which must be instantiated in the same scope as their 4239 /// enclosing function, so that they can reference function-local 4240 /// types, static variables, enumerators, etc. 4241 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4242 4243 void PerformPendingInstantiations(bool LocalOnly = false); 4244 4245 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4246 const MultiLevelTemplateArgumentList &TemplateArgs, 4247 SourceLocation Loc, DeclarationName Entity); 4248 4249 QualType SubstType(QualType T, 4250 const MultiLevelTemplateArgumentList &TemplateArgs, 4251 SourceLocation Loc, DeclarationName Entity); 4252 4253 TypeSourceInfo *SubstType(TypeLoc TL, 4254 const MultiLevelTemplateArgumentList &TemplateArgs, 4255 SourceLocation Loc, DeclarationName Entity); 4256 4257 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4258 const MultiLevelTemplateArgumentList &TemplateArgs, 4259 SourceLocation Loc, 4260 DeclarationName Entity); 4261 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4262 const MultiLevelTemplateArgumentList &TemplateArgs, 4263 llvm::Optional<unsigned> NumExpansions); 4264 bool SubstParmTypes(SourceLocation Loc, 4265 ParmVarDecl **Params, unsigned NumParams, 4266 const MultiLevelTemplateArgumentList &TemplateArgs, 4267 llvm::SmallVectorImpl<QualType> &ParamTypes, 4268 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4269 ExprResult SubstExpr(Expr *E, 4270 const MultiLevelTemplateArgumentList &TemplateArgs); 4271 4272 /// \brief Substitute the given template arguments into a list of 4273 /// expressions, expanding pack expansions if required. 4274 /// 4275 /// \param Exprs The list of expressions to substitute into. 4276 /// 4277 /// \param NumExprs The number of expressions in \p Exprs. 4278 /// 4279 /// \param IsCall Whether this is some form of call, in which case 4280 /// default arguments will be dropped. 4281 /// 4282 /// \param TemplateArgs The set of template arguments to substitute. 4283 /// 4284 /// \param Outputs Will receive all of the substituted arguments. 4285 /// 4286 /// \returns true if an error occurred, false otherwise. 4287 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4288 const MultiLevelTemplateArgumentList &TemplateArgs, 4289 llvm::SmallVectorImpl<Expr *> &Outputs); 4290 4291 StmtResult SubstStmt(Stmt *S, 4292 const MultiLevelTemplateArgumentList &TemplateArgs); 4293 4294 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4295 const MultiLevelTemplateArgumentList &TemplateArgs); 4296 4297 bool 4298 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4299 CXXRecordDecl *Pattern, 4300 const MultiLevelTemplateArgumentList &TemplateArgs); 4301 4302 bool 4303 InstantiateClass(SourceLocation PointOfInstantiation, 4304 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4305 const MultiLevelTemplateArgumentList &TemplateArgs, 4306 TemplateSpecializationKind TSK, 4307 bool Complain = true); 4308 4309 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4310 Decl *Pattern, Decl *Inst); 4311 4312 bool 4313 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4314 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4315 TemplateSpecializationKind TSK, 4316 bool Complain = true); 4317 4318 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4319 CXXRecordDecl *Instantiation, 4320 const MultiLevelTemplateArgumentList &TemplateArgs, 4321 TemplateSpecializationKind TSK); 4322 4323 void InstantiateClassTemplateSpecializationMembers( 4324 SourceLocation PointOfInstantiation, 4325 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4326 TemplateSpecializationKind TSK); 4327 4328 NestedNameSpecifierLoc 4329 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4330 const MultiLevelTemplateArgumentList &TemplateArgs); 4331 4332 DeclarationNameInfo 4333 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4334 const MultiLevelTemplateArgumentList &TemplateArgs); 4335 TemplateName 4336 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4337 SourceLocation Loc, 4338 const MultiLevelTemplateArgumentList &TemplateArgs); 4339 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4340 TemplateArgumentListInfo &Result, 4341 const MultiLevelTemplateArgumentList &TemplateArgs); 4342 4343 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4344 FunctionDecl *Function, 4345 bool Recursive = false, 4346 bool DefinitionRequired = false); 4347 void InstantiateStaticDataMemberDefinition( 4348 SourceLocation PointOfInstantiation, 4349 VarDecl *Var, 4350 bool Recursive = false, 4351 bool DefinitionRequired = false); 4352 4353 void InstantiateMemInitializers(CXXConstructorDecl *New, 4354 const CXXConstructorDecl *Tmpl, 4355 const MultiLevelTemplateArgumentList &TemplateArgs); 4356 4357 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4358 const MultiLevelTemplateArgumentList &TemplateArgs); 4359 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4360 const MultiLevelTemplateArgumentList &TemplateArgs); 4361 4362 // Objective-C declarations. 4363 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4364 IdentifierInfo *ClassName, 4365 SourceLocation ClassLoc, 4366 IdentifierInfo *SuperName, 4367 SourceLocation SuperLoc, 4368 Decl * const *ProtoRefs, 4369 unsigned NumProtoRefs, 4370 const SourceLocation *ProtoLocs, 4371 SourceLocation EndProtoLoc, 4372 AttributeList *AttrList); 4373 4374 Decl *ActOnCompatiblityAlias( 4375 SourceLocation AtCompatibilityAliasLoc, 4376 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4377 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4378 4379 void CheckForwardProtocolDeclarationForCircularDependency( 4380 IdentifierInfo *PName, 4381 SourceLocation &PLoc, SourceLocation PrevLoc, 4382 const ObjCList<ObjCProtocolDecl> &PList); 4383 4384 Decl *ActOnStartProtocolInterface( 4385 SourceLocation AtProtoInterfaceLoc, 4386 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4387 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4388 const SourceLocation *ProtoLocs, 4389 SourceLocation EndProtoLoc, 4390 AttributeList *AttrList); 4391 4392 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4393 IdentifierInfo *ClassName, 4394 SourceLocation ClassLoc, 4395 IdentifierInfo *CategoryName, 4396 SourceLocation CategoryLoc, 4397 Decl * const *ProtoRefs, 4398 unsigned NumProtoRefs, 4399 const SourceLocation *ProtoLocs, 4400 SourceLocation EndProtoLoc); 4401 4402 Decl *ActOnStartClassImplementation( 4403 SourceLocation AtClassImplLoc, 4404 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4405 IdentifierInfo *SuperClassname, 4406 SourceLocation SuperClassLoc); 4407 4408 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4409 IdentifierInfo *ClassName, 4410 SourceLocation ClassLoc, 4411 IdentifierInfo *CatName, 4412 SourceLocation CatLoc); 4413 4414 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4415 IdentifierInfo **IdentList, 4416 SourceLocation *IdentLocs, 4417 unsigned NumElts); 4418 4419 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4420 const IdentifierLocPair *IdentList, 4421 unsigned NumElts, 4422 AttributeList *attrList); 4423 4424 void FindProtocolDeclaration(bool WarnOnDeclarations, 4425 const IdentifierLocPair *ProtocolId, 4426 unsigned NumProtocols, 4427 llvm::SmallVectorImpl<Decl *> &Protocols); 4428 4429 /// Ensure attributes are consistent with type. 4430 /// \param [in, out] Attributes The attributes to check; they will 4431 /// be modified to be consistent with \arg PropertyTy. 4432 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4433 SourceLocation Loc, 4434 unsigned &Attributes); 4435 4436 /// Process the specified property declaration and create decls for the 4437 /// setters and getters as needed. 4438 /// \param property The property declaration being processed 4439 /// \param DC The semantic container for the property 4440 /// \param redeclaredProperty Declaration for property if redeclared 4441 /// in class extension. 4442 /// \param lexicalDC Container for redeclaredProperty. 4443 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4444 ObjCContainerDecl *DC, 4445 ObjCPropertyDecl *redeclaredProperty = 0, 4446 ObjCContainerDecl *lexicalDC = 0); 4447 4448 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4449 ObjCPropertyDecl *SuperProperty, 4450 const IdentifierInfo *Name); 4451 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4452 4453 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4454 ObjCMethodDecl *MethodDecl, 4455 bool IsInstance); 4456 4457 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4458 4459 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4460 ObjCInterfaceDecl *ID); 4461 4462 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4463 ObjCProtocolDecl *PDecl); 4464 4465 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4466 Decl **allMethods = 0, unsigned allNum = 0, 4467 Decl **allProperties = 0, unsigned pNum = 0, 4468 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4469 4470 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4471 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4472 Selector GetterSel, Selector SetterSel, 4473 Decl *ClassCategory, 4474 bool *OverridingProperty, 4475 tok::ObjCKeywordKind MethodImplKind, 4476 DeclContext *lexicalDC = 0); 4477 4478 Decl *ActOnPropertyImplDecl(Scope *S, 4479 SourceLocation AtLoc, 4480 SourceLocation PropertyLoc, 4481 bool ImplKind,Decl *ClassImplDecl, 4482 IdentifierInfo *PropertyId, 4483 IdentifierInfo *PropertyIvar, 4484 SourceLocation PropertyIvarLoc); 4485 4486 struct ObjCArgInfo { 4487 IdentifierInfo *Name; 4488 SourceLocation NameLoc; 4489 // The Type is null if no type was specified, and the DeclSpec is invalid 4490 // in this case. 4491 ParsedType Type; 4492 ObjCDeclSpec DeclSpec; 4493 4494 /// ArgAttrs - Attribute list for this argument. 4495 AttributeList *ArgAttrs; 4496 }; 4497 4498 Decl *ActOnMethodDeclaration( 4499 Scope *S, 4500 SourceLocation BeginLoc, // location of the + or -. 4501 SourceLocation EndLoc, // location of the ; or {. 4502 tok::TokenKind MethodType, 4503 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4504 Selector Sel, 4505 // optional arguments. The number of types/arguments is obtained 4506 // from the Sel.getNumArgs(). 4507 ObjCArgInfo *ArgInfo, 4508 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4509 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4510 bool isVariadic = false); 4511 4512 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4513 // Will search "local" class/category implementations for a method decl. 4514 // Will also search in class's root looking for instance method. 4515 // Returns 0 if no method is found. 4516 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4517 ObjCInterfaceDecl *CDecl); 4518 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4519 ObjCInterfaceDecl *ClassDecl); 4520 4521 ExprResult 4522 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4523 Expr *BaseExpr, 4524 DeclarationName MemberName, 4525 SourceLocation MemberLoc, 4526 SourceLocation SuperLoc, QualType SuperType, 4527 bool Super); 4528 4529 ExprResult 4530 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4531 IdentifierInfo &propertyName, 4532 SourceLocation receiverNameLoc, 4533 SourceLocation propertyNameLoc); 4534 4535 ObjCMethodDecl *tryCaptureObjCSelf(); 4536 4537 /// \brief Describes the kind of message expression indicated by a message 4538 /// send that starts with an identifier. 4539 enum ObjCMessageKind { 4540 /// \brief The message is sent to 'super'. 4541 ObjCSuperMessage, 4542 /// \brief The message is an instance message. 4543 ObjCInstanceMessage, 4544 /// \brief The message is a class message, and the identifier is a type 4545 /// name. 4546 ObjCClassMessage 4547 }; 4548 4549 ObjCMessageKind getObjCMessageKind(Scope *S, 4550 IdentifierInfo *Name, 4551 SourceLocation NameLoc, 4552 bool IsSuper, 4553 bool HasTrailingDot, 4554 ParsedType &ReceiverType); 4555 4556 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4557 Selector Sel, 4558 SourceLocation LBracLoc, 4559 SourceLocation SelectorLoc, 4560 SourceLocation RBracLoc, 4561 MultiExprArg Args); 4562 4563 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4564 QualType ReceiverType, 4565 SourceLocation SuperLoc, 4566 Selector Sel, 4567 ObjCMethodDecl *Method, 4568 SourceLocation LBracLoc, 4569 SourceLocation SelectorLoc, 4570 SourceLocation RBracLoc, 4571 MultiExprArg Args); 4572 4573 ExprResult ActOnClassMessage(Scope *S, 4574 ParsedType Receiver, 4575 Selector Sel, 4576 SourceLocation LBracLoc, 4577 SourceLocation SelectorLoc, 4578 SourceLocation RBracLoc, 4579 MultiExprArg Args); 4580 4581 ExprResult BuildInstanceMessage(Expr *Receiver, 4582 QualType ReceiverType, 4583 SourceLocation SuperLoc, 4584 Selector Sel, 4585 ObjCMethodDecl *Method, 4586 SourceLocation LBracLoc, 4587 SourceLocation SelectorLoc, 4588 SourceLocation RBracLoc, 4589 MultiExprArg Args); 4590 4591 ExprResult ActOnInstanceMessage(Scope *S, 4592 Expr *Receiver, 4593 Selector Sel, 4594 SourceLocation LBracLoc, 4595 SourceLocation SelectorLoc, 4596 SourceLocation RBracLoc, 4597 MultiExprArg Args); 4598 4599 4600 enum PragmaOptionsAlignKind { 4601 POAK_Native, // #pragma options align=native 4602 POAK_Natural, // #pragma options align=natural 4603 POAK_Packed, // #pragma options align=packed 4604 POAK_Power, // #pragma options align=power 4605 POAK_Mac68k, // #pragma options align=mac68k 4606 POAK_Reset // #pragma options align=reset 4607 }; 4608 4609 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4610 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4611 SourceLocation PragmaLoc, 4612 SourceLocation KindLoc); 4613 4614 enum PragmaPackKind { 4615 PPK_Default, // #pragma pack([n]) 4616 PPK_Show, // #pragma pack(show), only supported by MSVC. 4617 PPK_Push, // #pragma pack(push, [identifier], [n]) 4618 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4619 }; 4620 4621 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4622 void ActOnPragmaPack(PragmaPackKind Kind, 4623 IdentifierInfo *Name, 4624 Expr *Alignment, 4625 SourceLocation PragmaLoc, 4626 SourceLocation LParenLoc, 4627 SourceLocation RParenLoc); 4628 4629 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4630 void ActOnPragmaUnused(const Token &Identifier, 4631 Scope *curScope, 4632 SourceLocation PragmaLoc); 4633 4634 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4635 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4636 SourceLocation PragmaLoc); 4637 4638 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4639 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4640 4641 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4642 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4643 SourceLocation PragmaLoc, 4644 SourceLocation WeakNameLoc); 4645 4646 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4647 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4648 IdentifierInfo* AliasName, 4649 SourceLocation PragmaLoc, 4650 SourceLocation WeakNameLoc, 4651 SourceLocation AliasNameLoc); 4652 4653 /// ActOnPragmaFPContract - Called on well formed 4654 /// #pragma {STDC,OPENCL} FP_CONTRACT 4655 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4656 4657 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4658 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4659 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4660 4661 /// FreePackedContext - Deallocate and null out PackContext. 4662 void FreePackedContext(); 4663 4664 /// PushNamespaceVisibilityAttr - Note that we've entered a 4665 /// namespace with a visibility attribute. 4666 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4667 4668 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4669 /// add an appropriate visibility attribute. 4670 void AddPushedVisibilityAttribute(Decl *RD); 4671 4672 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4673 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4674 void PopPragmaVisibility(); 4675 4676 /// FreeVisContext - Deallocate and null out VisContext. 4677 void FreeVisContext(); 4678 4679 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4680 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4681 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4682 4683 /// CastCategory - Get the correct forwarded implicit cast result category 4684 /// from the inner expression. 4685 ExprValueKind CastCategory(Expr *E); 4686 4687 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4688 /// cast. If there is already an implicit cast, merge into the existing one. 4689 /// If isLvalue, the result of the cast is an lvalue. 4690 void ImpCastExprToType(Expr *&Expr, QualType Type, CastKind CK, 4691 ExprValueKind VK = VK_RValue, 4692 const CXXCastPath *BasePath = 0); 4693 4694 /// IgnoredValueConversions - Given that an expression's result is 4695 /// syntactically ignored, perform any conversions that are 4696 /// required. 4697 void IgnoredValueConversions(Expr *&expr); 4698 4699 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4700 // functions and arrays to their respective pointers (C99 6.3.2.1). 4701 Expr *UsualUnaryConversions(Expr *&expr); 4702 4703 // DefaultFunctionArrayConversion - converts functions and arrays 4704 // to their respective pointers (C99 6.3.2.1). 4705 void DefaultFunctionArrayConversion(Expr *&expr); 4706 4707 // DefaultFunctionArrayLvalueConversion - converts functions and 4708 // arrays to their respective pointers and performs the 4709 // lvalue-to-rvalue conversion. 4710 void DefaultFunctionArrayLvalueConversion(Expr *&expr); 4711 4712 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4713 // the operand. This is DefaultFunctionArrayLvalueConversion, 4714 // except that it assumes the operand isn't of function or array 4715 // type. 4716 void DefaultLvalueConversion(Expr *&expr); 4717 4718 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4719 // do not have a prototype. Integer promotions are performed on each 4720 // argument, and arguments that have type float are promoted to double. 4721 void DefaultArgumentPromotion(Expr *&Expr); 4722 4723 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4724 enum VariadicCallType { 4725 VariadicFunction, 4726 VariadicBlock, 4727 VariadicMethod, 4728 VariadicConstructor, 4729 VariadicDoesNotApply 4730 }; 4731 4732 /// GatherArgumentsForCall - Collector argument expressions for various 4733 /// form of call prototypes. 4734 bool GatherArgumentsForCall(SourceLocation CallLoc, 4735 FunctionDecl *FDecl, 4736 const FunctionProtoType *Proto, 4737 unsigned FirstProtoArg, 4738 Expr **Args, unsigned NumArgs, 4739 llvm::SmallVector<Expr *, 8> &AllArgs, 4740 VariadicCallType CallType = VariadicDoesNotApply); 4741 4742 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4743 // will warn if the resulting type is not a POD type. 4744 bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT, 4745 FunctionDecl *FDecl); 4746 4747 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4748 // operands and then handles various conversions that are common to binary 4749 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4750 // routine returns the first non-arithmetic type found. The client is 4751 // responsible for emitting appropriate error diagnostics. 4752 QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr, 4753 bool isCompAssign = false); 4754 4755 /// AssignConvertType - All of the 'assignment' semantic checks return this 4756 /// enum to indicate whether the assignment was allowed. These checks are 4757 /// done for simple assignments, as well as initialization, return from 4758 /// function, argument passing, etc. The query is phrased in terms of a 4759 /// source and destination type. 4760 enum AssignConvertType { 4761 /// Compatible - the types are compatible according to the standard. 4762 Compatible, 4763 4764 /// PointerToInt - The assignment converts a pointer to an int, which we 4765 /// accept as an extension. 4766 PointerToInt, 4767 4768 /// IntToPointer - The assignment converts an int to a pointer, which we 4769 /// accept as an extension. 4770 IntToPointer, 4771 4772 /// FunctionVoidPointer - The assignment is between a function pointer and 4773 /// void*, which the standard doesn't allow, but we accept as an extension. 4774 FunctionVoidPointer, 4775 4776 /// IncompatiblePointer - The assignment is between two pointers types that 4777 /// are not compatible, but we accept them as an extension. 4778 IncompatiblePointer, 4779 4780 /// IncompatiblePointer - The assignment is between two pointers types which 4781 /// point to integers which have a different sign, but are otherwise identical. 4782 /// This is a subset of the above, but broken out because it's by far the most 4783 /// common case of incompatible pointers. 4784 IncompatiblePointerSign, 4785 4786 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4787 /// c/v/r qualifiers, which we accept as an extension. 4788 CompatiblePointerDiscardsQualifiers, 4789 4790 /// IncompatiblePointerDiscardsQualifiers - The assignment 4791 /// discards qualifiers that we don't permit to be discarded, 4792 /// like address spaces. 4793 IncompatiblePointerDiscardsQualifiers, 4794 4795 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4796 /// nested pointer types, and the qualifiers other than the first two 4797 /// levels differ e.g. char ** -> const char **, but we accept them as an 4798 /// extension. 4799 IncompatibleNestedPointerQualifiers, 4800 4801 /// IncompatibleVectors - The assignment is between two vector types that 4802 /// have the same size, which we accept as an extension. 4803 IncompatibleVectors, 4804 4805 /// IntToBlockPointer - The assignment converts an int to a block 4806 /// pointer. We disallow this. 4807 IntToBlockPointer, 4808 4809 /// IncompatibleBlockPointer - The assignment is between two block 4810 /// pointers types that are not compatible. 4811 IncompatibleBlockPointer, 4812 4813 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4814 /// id type and something else (that is incompatible with it). For example, 4815 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4816 IncompatibleObjCQualifiedId, 4817 4818 /// Incompatible - We reject this conversion outright, it is invalid to 4819 /// represent it in the AST. 4820 Incompatible 4821 }; 4822 4823 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4824 /// assignment conversion type specified by ConvTy. This returns true if the 4825 /// conversion was invalid or false if the conversion was accepted. 4826 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4827 SourceLocation Loc, 4828 QualType DstType, QualType SrcType, 4829 Expr *SrcExpr, AssignmentAction Action, 4830 bool *Complained = 0); 4831 4832 /// CheckAssignmentConstraints - Perform type checking for assignment, 4833 /// argument passing, variable initialization, and function return values. 4834 /// C99 6.5.16. 4835 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 4836 QualType lhs, QualType rhs); 4837 4838 /// Check assignment constraints and prepare for a conversion of the 4839 /// RHS to the LHS type. 4840 AssignConvertType CheckAssignmentConstraints(QualType lhs, Expr *&rhs, 4841 CastKind &Kind); 4842 4843 // CheckSingleAssignmentConstraints - Currently used by 4844 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4845 // this routine performs the default function/array converions. 4846 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4847 Expr *&rExpr); 4848 4849 // \brief If the lhs type is a transparent union, check whether we 4850 // can initialize the transparent union with the given expression. 4851 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4852 Expr *&rExpr); 4853 4854 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4855 4856 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4857 4858 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4859 AssignmentAction Action, 4860 bool AllowExplicit = false); 4861 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4862 AssignmentAction Action, 4863 bool AllowExplicit, 4864 ImplicitConversionSequence& ICS); 4865 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4866 const ImplicitConversionSequence& ICS, 4867 AssignmentAction Action, 4868 bool CStyle = false); 4869 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4870 const StandardConversionSequence& SCS, 4871 AssignmentAction Action, 4872 bool CStyle); 4873 4874 /// the following "Check" methods will return a valid/converted QualType 4875 /// or a null QualType (indicating an error diagnostic was issued). 4876 4877 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4878 QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4879 QualType CheckPointerToMemberOperands( // C++ 5.5 4880 Expr *&lex, Expr *&rex, ExprValueKind &VK, 4881 SourceLocation OpLoc, bool isIndirect); 4882 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4883 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign, 4884 bool isDivide); 4885 QualType CheckRemainderOperands( // C99 6.5.5 4886 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4887 QualType CheckAdditionOperands( // C99 6.5.6 4888 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4889 QualType CheckSubtractionOperands( // C99 6.5.6 4890 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4891 QualType CheckShiftOperands( // C99 6.5.7 4892 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4893 bool isCompAssign = false); 4894 QualType CheckCompareOperands( // C99 6.5.8/9 4895 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4896 bool isRelational); 4897 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4898 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4899 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4900 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc); 4901 // CheckAssignmentOperands is used for both simple and compound assignment. 4902 // For simple assignment, pass both expressions and a null converted type. 4903 // For compound assignment, pass both expressions and the converted type. 4904 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4905 Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType); 4906 4907 void ConvertPropertyForRValue(Expr *&E); 4908 void ConvertPropertyForLValue(Expr *&LHS, Expr *&RHS, QualType& LHSTy); 4909 4910 QualType CheckConditionalOperands( // C99 6.5.15 4911 Expr *&cond, Expr *&lhs, Expr *&rhs, 4912 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4913 QualType CXXCheckConditionalOperands( // C++ 5.16 4914 Expr *&cond, Expr *&lhs, Expr *&rhs, 4915 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4916 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4917 bool *NonStandardCompositeType = 0); 4918 4919 QualType FindCompositeObjCPointerType(Expr *&LHS, Expr *&RHS, 4920 SourceLocation questionLoc); 4921 4922 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 4923 SourceLocation QuestionLoc); 4924 4925 /// type checking for vector binary operators. 4926 QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4927 QualType CheckVectorCompareOperands(Expr *&lex, Expr *&rx, 4928 SourceLocation l, bool isRel); 4929 4930 /// type checking declaration initializers (C99 6.7.8) 4931 bool CheckInitList(const InitializedEntity &Entity, 4932 InitListExpr *&InitList, QualType &DeclType); 4933 bool CheckForConstantInitializer(Expr *e, QualType t); 4934 4935 // type checking C++ declaration initializers (C++ [dcl.init]). 4936 4937 /// ReferenceCompareResult - Expresses the result of comparing two 4938 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 4939 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 4940 enum ReferenceCompareResult { 4941 /// Ref_Incompatible - The two types are incompatible, so direct 4942 /// reference binding is not possible. 4943 Ref_Incompatible = 0, 4944 /// Ref_Related - The two types are reference-related, which means 4945 /// that their unqualified forms (T1 and T2) are either the same 4946 /// or T1 is a base class of T2. 4947 Ref_Related, 4948 /// Ref_Compatible_With_Added_Qualification - The two types are 4949 /// reference-compatible with added qualification, meaning that 4950 /// they are reference-compatible and the qualifiers on T1 (cv1) 4951 /// are greater than the qualifiers on T2 (cv2). 4952 Ref_Compatible_With_Added_Qualification, 4953 /// Ref_Compatible - The two types are reference-compatible and 4954 /// have equivalent qualifiers (cv1 == cv2). 4955 Ref_Compatible 4956 }; 4957 4958 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 4959 QualType T1, QualType T2, 4960 bool &DerivedToBase, 4961 bool &ObjCConversion); 4962 4963 /// CheckCastTypes - Check type constraints for casting between types under 4964 /// C semantics, or forward to CXXCheckCStyleCast in C++. 4965 bool CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *&CastExpr, 4966 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 4967 bool FunctionalStyle = false); 4968 4969 // CheckVectorCast - check type constraints for 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 // returns true if the cast is invalid 4973 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 4974 CastKind &Kind); 4975 4976 // CheckExtVectorCast - check type constraints for extended vectors. 4977 // Since vectors are an extension, there are no C standard reference for this. 4978 // We allow casting between vectors and integer datatypes of the same size, 4979 // or vectors and the element type of that vector. 4980 // returns true if the cast is invalid 4981 bool CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *&CastExpr, 4982 CastKind &Kind); 4983 4984 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 4985 /// cast under C++ semantics. 4986 bool CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 4987 Expr *&CastExpr, CastKind &Kind, 4988 CXXCastPath &BasePath, bool FunctionalStyle); 4989 4990 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 4991 /// \param Method - May be null. 4992 /// \param [out] ReturnType - The return type of the send. 4993 /// \return true iff there were any incompatible types. 4994 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 4995 ObjCMethodDecl *Method, bool isClassMessage, 4996 SourceLocation lbrac, SourceLocation rbrac, 4997 QualType &ReturnType, ExprValueKind &VK); 4998 4999 /// CheckBooleanCondition - Diagnose problems involving the use of 5000 /// the given expression as a boolean condition (e.g. in an if 5001 /// statement). Also performs the standard function and array 5002 /// decays, possibly changing the input variable. 5003 /// 5004 /// \param Loc - A location associated with the condition, e.g. the 5005 /// 'if' keyword. 5006 /// \return true iff there were any errors 5007 bool CheckBooleanCondition(Expr *&CondExpr, SourceLocation Loc); 5008 5009 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5010 Expr *SubExpr); 5011 5012 /// DiagnoseAssignmentAsCondition - Given that an expression is 5013 /// being used as a boolean condition, warn if it's an assignment. 5014 void DiagnoseAssignmentAsCondition(Expr *E); 5015 5016 /// \brief Redundant parentheses over an equality comparison can indicate 5017 /// that the user intended an assignment used as condition. 5018 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5019 5020 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5021 bool CheckCXXBooleanCondition(Expr *&CondExpr); 5022 5023 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5024 /// the specified width and sign. If an overflow occurs, detect it and emit 5025 /// the specified diagnostic. 5026 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5027 unsigned NewWidth, bool NewSign, 5028 SourceLocation Loc, unsigned DiagID); 5029 5030 /// Checks that the Objective-C declaration is declared in the global scope. 5031 /// Emits an error and marks the declaration as invalid if it's not declared 5032 /// in the global scope. 5033 bool CheckObjCDeclScope(Decl *D); 5034 5035 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5036 /// and reports the appropriate diagnostics. Returns false on success. 5037 /// Can optionally return the value of the expression. 5038 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5039 5040 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5041 /// the correct width, and that the field type is valid. 5042 /// Returns false on success. 5043 /// Can optionally return whether the bit-field is of width 0 5044 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5045 QualType FieldTy, const Expr *BitWidth, 5046 bool *ZeroWidth = 0); 5047 5048 /// \name Code completion 5049 //@{ 5050 /// \brief Describes the context in which code completion occurs. 5051 enum ParserCompletionContext { 5052 /// \brief Code completion occurs at top-level or namespace context. 5053 PCC_Namespace, 5054 /// \brief Code completion occurs within a class, struct, or union. 5055 PCC_Class, 5056 /// \brief Code completion occurs within an Objective-C interface, protocol, 5057 /// or category. 5058 PCC_ObjCInterface, 5059 /// \brief Code completion occurs within an Objective-C implementation or 5060 /// category implementation 5061 PCC_ObjCImplementation, 5062 /// \brief Code completion occurs within the list of instance variables 5063 /// in an Objective-C interface, protocol, category, or implementation. 5064 PCC_ObjCInstanceVariableList, 5065 /// \brief Code completion occurs following one or more template 5066 /// headers. 5067 PCC_Template, 5068 /// \brief Code completion occurs following one or more template 5069 /// headers within a class. 5070 PCC_MemberTemplate, 5071 /// \brief Code completion occurs within an expression. 5072 PCC_Expression, 5073 /// \brief Code completion occurs within a statement, which may 5074 /// also be an expression or a declaration. 5075 PCC_Statement, 5076 /// \brief Code completion occurs at the beginning of the 5077 /// initialization statement (or expression) in a for loop. 5078 PCC_ForInit, 5079 /// \brief Code completion occurs within the condition of an if, 5080 /// while, switch, or for statement. 5081 PCC_Condition, 5082 /// \brief Code completion occurs within the body of a function on a 5083 /// recovery path, where we do not have a specific handle on our position 5084 /// in the grammar. 5085 PCC_RecoveryInFunction, 5086 /// \brief Code completion occurs where only a type is permitted. 5087 PCC_Type, 5088 /// \brief Code completion occurs in a parenthesized expression, which 5089 /// might also be a type cast. 5090 PCC_ParenthesizedExpression, 5091 /// \brief Code completion occurs within a sequence of declaration 5092 /// specifiers within a function, method, or block. 5093 PCC_LocalDeclarationSpecifiers 5094 }; 5095 5096 void CodeCompleteOrdinaryName(Scope *S, 5097 ParserCompletionContext CompletionContext); 5098 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5099 bool AllowNonIdentifiers, 5100 bool AllowNestedNameSpecifiers); 5101 5102 struct CodeCompleteExpressionData; 5103 void CodeCompleteExpression(Scope *S, 5104 const CodeCompleteExpressionData &Data); 5105 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5106 SourceLocation OpLoc, 5107 bool IsArrow); 5108 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5109 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5110 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5111 void CodeCompleteCase(Scope *S); 5112 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5113 void CodeCompleteInitializer(Scope *S, Decl *D); 5114 void CodeCompleteReturn(Scope *S); 5115 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5116 5117 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5118 bool EnteringContext); 5119 void CodeCompleteUsing(Scope *S); 5120 void CodeCompleteUsingDirective(Scope *S); 5121 void CodeCompleteNamespaceDecl(Scope *S); 5122 void CodeCompleteNamespaceAliasDecl(Scope *S); 5123 void CodeCompleteOperatorName(Scope *S); 5124 void CodeCompleteConstructorInitializer(Decl *Constructor, 5125 CXXCtorInitializer** Initializers, 5126 unsigned NumInitializers); 5127 5128 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5129 bool InInterface); 5130 void CodeCompleteObjCAtVisibility(Scope *S); 5131 void CodeCompleteObjCAtStatement(Scope *S); 5132 void CodeCompleteObjCAtExpression(Scope *S); 5133 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5134 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5135 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5136 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5137 bool IsParameter); 5138 void CodeCompleteObjCMessageReceiver(Scope *S); 5139 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5140 IdentifierInfo **SelIdents, 5141 unsigned NumSelIdents, 5142 bool AtArgumentExpression); 5143 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5144 IdentifierInfo **SelIdents, 5145 unsigned NumSelIdents, 5146 bool AtArgumentExpression, 5147 bool IsSuper = false); 5148 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5149 IdentifierInfo **SelIdents, 5150 unsigned NumSelIdents, 5151 bool AtArgumentExpression, 5152 ObjCInterfaceDecl *Super = 0); 5153 void CodeCompleteObjCForCollection(Scope *S, 5154 DeclGroupPtrTy IterationVar); 5155 void CodeCompleteObjCSelector(Scope *S, 5156 IdentifierInfo **SelIdents, 5157 unsigned NumSelIdents); 5158 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5159 unsigned NumProtocols); 5160 void CodeCompleteObjCProtocolDecl(Scope *S); 5161 void CodeCompleteObjCInterfaceDecl(Scope *S); 5162 void CodeCompleteObjCSuperclass(Scope *S, 5163 IdentifierInfo *ClassName, 5164 SourceLocation ClassNameLoc); 5165 void CodeCompleteObjCImplementationDecl(Scope *S); 5166 void CodeCompleteObjCInterfaceCategory(Scope *S, 5167 IdentifierInfo *ClassName, 5168 SourceLocation ClassNameLoc); 5169 void CodeCompleteObjCImplementationCategory(Scope *S, 5170 IdentifierInfo *ClassName, 5171 SourceLocation ClassNameLoc); 5172 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5173 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5174 IdentifierInfo *PropertyName, 5175 Decl *ObjCImpDecl); 5176 void CodeCompleteObjCMethodDecl(Scope *S, 5177 bool IsInstanceMethod, 5178 ParsedType ReturnType, 5179 Decl *IDecl); 5180 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5181 bool IsInstanceMethod, 5182 bool AtParameterName, 5183 ParsedType ReturnType, 5184 IdentifierInfo **SelIdents, 5185 unsigned NumSelIdents); 5186 void CodeCompletePreprocessorDirective(bool InConditional); 5187 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5188 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5189 void CodeCompletePreprocessorExpression(); 5190 void CodeCompletePreprocessorMacroArgument(Scope *S, 5191 IdentifierInfo *Macro, 5192 MacroInfo *MacroInfo, 5193 unsigned Argument); 5194 void CodeCompleteNaturalLanguage(); 5195 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5196 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5197 //@} 5198 5199 void PrintStats() const {} 5200 5201 //===--------------------------------------------------------------------===// 5202 // Extra semantic analysis beyond the C type system 5203 5204public: 5205 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5206 unsigned ByteNo) const; 5207 5208private: 5209 void CheckArrayAccess(const Expr *E); 5210 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5211 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5212 5213 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5214 bool CheckObjCString(Expr *Arg); 5215 5216 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5217 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5218 5219 bool SemaBuiltinVAStart(CallExpr *TheCall); 5220 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5221 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5222 5223public: 5224 // Used by C++ template instantiation. 5225 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5226 5227private: 5228 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5229 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5230 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5231 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5232 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5233 llvm::APSInt &Result); 5234 5235 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5236 bool HasVAListArg, unsigned format_idx, 5237 unsigned firstDataArg, bool isPrintf); 5238 5239 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5240 const CallExpr *TheCall, bool HasVAListArg, 5241 unsigned format_idx, unsigned firstDataArg, 5242 bool isPrintf); 5243 5244 void CheckNonNullArguments(const NonNullAttr *NonNull, 5245 const CallExpr *TheCall); 5246 5247 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5248 unsigned format_idx, unsigned firstDataArg, 5249 bool isPrintf); 5250 5251 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5252 SourceLocation ReturnLoc); 5253 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5254 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5255 5256 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5257 Expr *Init); 5258 5259 /// \brief The parser's current scope. 5260 /// 5261 /// The parser maintains this state here. 5262 Scope *CurScope; 5263 5264protected: 5265 friend class Parser; 5266 friend class InitializationSequence; 5267 5268 /// \brief Retrieve the parser's current scope. 5269 Scope *getCurScope() const { return CurScope; } 5270}; 5271 5272/// \brief RAII object that enters a new expression evaluation context. 5273class EnterExpressionEvaluationContext { 5274 Sema &Actions; 5275 5276public: 5277 EnterExpressionEvaluationContext(Sema &Actions, 5278 Sema::ExpressionEvaluationContext NewContext) 5279 : Actions(Actions) { 5280 Actions.PushExpressionEvaluationContext(NewContext); 5281 } 5282 5283 ~EnterExpressionEvaluationContext() { 5284 Actions.PopExpressionEvaluationContext(); 5285 } 5286}; 5287 5288} // end namespace clang 5289 5290#endif 5291