Sema.h revision f4bbbf0aaf741cc7d014e2cf059670a6756f8cbd
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "clang/Basic/ExpressionTraits.h" 31#include "llvm/ADT/OwningPtr.h" 32#include "llvm/ADT/SmallPtrSet.h" 33#include "llvm/ADT/SmallVector.h" 34#include <deque> 35#include <string> 36 37namespace llvm { 38 class APSInt; 39 template <typename ValueT> struct DenseMapInfo; 40 template <typename ValueT, typename ValueInfoT> class DenseSet; 41} 42 43namespace clang { 44 class ADLResult; 45 class ASTConsumer; 46 class ASTContext; 47 class ASTMutationListener; 48 class ArrayType; 49 class AttributeList; 50 class BlockDecl; 51 class CXXBasePath; 52 class CXXBasePaths; 53 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 54 class CXXConstructorDecl; 55 class CXXConversionDecl; 56 class CXXDestructorDecl; 57 class CXXFieldCollector; 58 class CXXMemberCallExpr; 59 class CXXMethodDecl; 60 class CXXScopeSpec; 61 class CXXTemporary; 62 class CXXTryStmt; 63 class CallExpr; 64 class ClassTemplateDecl; 65 class ClassTemplatePartialSpecializationDecl; 66 class ClassTemplateSpecializationDecl; 67 class CodeCompleteConsumer; 68 class CodeCompletionAllocator; 69 class CodeCompletionResult; 70 class Decl; 71 class DeclAccessPair; 72 class DeclContext; 73 class DeclRefExpr; 74 class DeclaratorDecl; 75 class DeducedTemplateArgument; 76 class DependentDiagnostic; 77 class DesignatedInitExpr; 78 class Designation; 79 class EnumConstantDecl; 80 class Expr; 81 class ExtVectorType; 82 class ExternalSemaSource; 83 class FormatAttr; 84 class FriendDecl; 85 class FunctionDecl; 86 class FunctionProtoType; 87 class FunctionTemplateDecl; 88 class ImplicitConversionSequence; 89 class InitListExpr; 90 class InitializationKind; 91 class InitializationSequence; 92 class InitializedEntity; 93 class IntegerLiteral; 94 class LabelStmt; 95 class LangOptions; 96 class LocalInstantiationScope; 97 class LookupResult; 98 class MacroInfo; 99 class MultiLevelTemplateArgumentList; 100 class NamedDecl; 101 class NonNullAttr; 102 class ObjCCategoryDecl; 103 class ObjCCategoryImplDecl; 104 class ObjCCompatibleAliasDecl; 105 class ObjCContainerDecl; 106 class ObjCImplDecl; 107 class ObjCImplementationDecl; 108 class ObjCInterfaceDecl; 109 class ObjCIvarDecl; 110 template <class T> class ObjCList; 111 class ObjCMethodDecl; 112 class ObjCPropertyDecl; 113 class ObjCProtocolDecl; 114 class OverloadCandidateSet; 115 class OverloadExpr; 116 class ParenListExpr; 117 class ParmVarDecl; 118 class Preprocessor; 119 class PseudoDestructorTypeStorage; 120 class QualType; 121 class StandardConversionSequence; 122 class Stmt; 123 class StringLiteral; 124 class SwitchStmt; 125 class TargetAttributesSema; 126 class TemplateArgument; 127 class TemplateArgumentList; 128 class TemplateArgumentLoc; 129 class TemplateDecl; 130 class TemplateParameterList; 131 class TemplatePartialOrderingContext; 132 class TemplateTemplateParmDecl; 133 class Token; 134 class TypeAliasDecl; 135 class TypedefDecl; 136 class TypedefNameDecl; 137 class TypeLoc; 138 class UnqualifiedId; 139 class UnresolvedLookupExpr; 140 class UnresolvedMemberExpr; 141 class UnresolvedSetImpl; 142 class UnresolvedSetIterator; 143 class UsingDecl; 144 class UsingShadowDecl; 145 class ValueDecl; 146 class VarDecl; 147 class VisibilityAttr; 148 class VisibleDeclConsumer; 149 class IndirectFieldDecl; 150 151namespace sema { 152 class AccessedEntity; 153 class BlockScopeInfo; 154 class DelayedDiagnostic; 155 class FunctionScopeInfo; 156 class TemplateDeductionInfo; 157} 158 159/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 160/// parsing. 161/// 162/// LocInfoType is a "transient" type, only needed for passing to/from Parser 163/// and Sema, when we want to preserve type source info for a parsed type. 164/// It will not participate in the type system semantics in any way. 165class LocInfoType : public Type { 166 enum { 167 // The last number that can fit in Type's TC. 168 // Avoids conflict with an existing Type class. 169 LocInfo = Type::TypeLast + 1 170 }; 171 172 TypeSourceInfo *DeclInfo; 173 174 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 175 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 176 ty->isVariablyModifiedType(), 177 ty->containsUnexpandedParameterPack()), 178 DeclInfo(TInfo) { 179 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 180 } 181 friend class Sema; 182 183public: 184 QualType getType() const { return getCanonicalTypeInternal(); } 185 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 186 187 void getAsStringInternal(std::string &Str, 188 const PrintingPolicy &Policy) const; 189 190 static bool classof(const Type *T) { 191 return T->getTypeClass() == (TypeClass)LocInfo; 192 } 193 static bool classof(const LocInfoType *) { return true; } 194}; 195 196// FIXME: No way to easily map from TemplateTypeParmTypes to 197// TemplateTypeParmDecls, so we have this horrible PointerUnion. 198typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 199 SourceLocation> UnexpandedParameterPack; 200 201/// Sema - This implements semantic analysis and AST building for C. 202class Sema { 203 Sema(const Sema&); // DO NOT IMPLEMENT 204 void operator=(const Sema&); // DO NOT IMPLEMENT 205 mutable const TargetAttributesSema* TheTargetAttributesSema; 206public: 207 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 208 typedef OpaquePtr<TemplateName> TemplateTy; 209 typedef OpaquePtr<QualType> TypeTy; 210 typedef Attr AttrTy; 211 typedef CXXBaseSpecifier BaseTy; 212 typedef CXXCtorInitializer MemInitTy; 213 typedef Expr ExprTy; 214 typedef Stmt StmtTy; 215 typedef TemplateParameterList TemplateParamsTy; 216 typedef NestedNameSpecifier CXXScopeTy; 217 218 OpenCLOptions OpenCLFeatures; 219 FPOptions FPFeatures; 220 221 const LangOptions &LangOpts; 222 Preprocessor &PP; 223 ASTContext &Context; 224 ASTConsumer &Consumer; 225 Diagnostic &Diags; 226 SourceManager &SourceMgr; 227 228 /// \brief Source of additional semantic information. 229 ExternalSemaSource *ExternalSource; 230 231 /// \brief Code-completion consumer. 232 CodeCompleteConsumer *CodeCompleter; 233 234 /// CurContext - This is the current declaration context of parsing. 235 DeclContext *CurContext; 236 237 /// VAListTagName - The declaration name corresponding to __va_list_tag. 238 /// This is used as part of a hack to omit that class from ADL results. 239 DeclarationName VAListTagName; 240 241 /// PackContext - Manages the stack for #pragma pack. An alignment 242 /// of 0 indicates default alignment. 243 void *PackContext; // Really a "PragmaPackStack*" 244 245 bool MSStructPragmaOn; // True when #pragma ms_struct on 246 247 /// VisContext - Manages the stack for #pragma GCC visibility. 248 void *VisContext; // Really a "PragmaVisStack*" 249 250 /// \brief Stack containing information about each of the nested 251 /// function, block, and method scopes that are currently active. 252 /// 253 /// This array is never empty. Clients should ignore the first 254 /// element, which is used to cache a single FunctionScopeInfo 255 /// that's used to parse every top-level function. 256 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 257 258 /// ExprTemporaries - This is the stack of temporaries that are created by 259 /// the current full expression. 260 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 261 262 /// ExtVectorDecls - This is a list all the extended vector types. This allows 263 /// us to associate a raw vector type with one of the ext_vector type names. 264 /// This is only necessary for issuing pretty diagnostics. 265 llvm::SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 266 267 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 268 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 269 270 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 271 272 /// PureVirtualClassDiagSet - a set of class declarations which we have 273 /// emitted a list of pure virtual functions. Used to prevent emitting the 274 /// same list more than once. 275 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 276 277 /// ParsingInitForAutoVars - a set of declarations with auto types for which 278 /// we are currently parsing the initializer. 279 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 280 281 /// \brief A mapping from external names to the most recent 282 /// locally-scoped external declaration with that name. 283 /// 284 /// This map contains external declarations introduced in local 285 /// scoped, e.g., 286 /// 287 /// \code 288 /// void f() { 289 /// void foo(int, int); 290 /// } 291 /// \endcode 292 /// 293 /// Here, the name "foo" will be associated with the declaration on 294 /// "foo" within f. This name is not visible outside of 295 /// "f". However, we still find it in two cases: 296 /// 297 /// - If we are declaring another external with the name "foo", we 298 /// can find "foo" as a previous declaration, so that the types 299 /// of this external declaration can be checked for 300 /// compatibility. 301 /// 302 /// - If we would implicitly declare "foo" (e.g., due to a call to 303 /// "foo" in C when no prototype or definition is visible), then 304 /// we find this declaration of "foo" and complain that it is 305 /// not visible. 306 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 307 308 /// \brief All the tentative definitions encountered in the TU. 309 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 310 311 /// \brief The set of file scoped decls seen so far that have not been used 312 /// and must warn if not used. Only contains the first declaration. 313 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 314 315 /// \brief Callback to the parser to parse templated functions when needed. 316 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 317 LateTemplateParserCB *LateTemplateParser; 318 void *OpaqueParser; 319 320 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 321 LateTemplateParser = LTP; 322 OpaqueParser = P; 323 } 324 325 class DelayedDiagnostics; 326 327 class ParsingDeclState { 328 unsigned SavedStackSize; 329 friend class Sema::DelayedDiagnostics; 330 }; 331 332 class ProcessingContextState { 333 unsigned SavedParsingDepth; 334 unsigned SavedActiveStackBase; 335 friend class Sema::DelayedDiagnostics; 336 }; 337 338 /// A class which encapsulates the logic for delaying diagnostics 339 /// during parsing and other processing. 340 class DelayedDiagnostics { 341 /// \brief The stack of diagnostics that were delayed due to being 342 /// produced during the parsing of a declaration. 343 sema::DelayedDiagnostic *Stack; 344 345 /// \brief The number of objects on the delayed-diagnostics stack. 346 unsigned StackSize; 347 348 /// \brief The current capacity of the delayed-diagnostics stack. 349 unsigned StackCapacity; 350 351 /// \brief The index of the first "active" delayed diagnostic in 352 /// the stack. When parsing class definitions, we ignore active 353 /// delayed diagnostics from the surrounding context. 354 unsigned ActiveStackBase; 355 356 /// \brief The depth of the declarations we're currently parsing. 357 /// This gets saved and reset whenever we enter a class definition. 358 unsigned ParsingDepth; 359 360 public: 361 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 362 ActiveStackBase(0), ParsingDepth(0) {} 363 364 ~DelayedDiagnostics() { 365 delete[] reinterpret_cast<char*>(Stack); 366 } 367 368 /// Adds a delayed diagnostic. 369 void add(const sema::DelayedDiagnostic &diag); 370 371 /// Determines whether diagnostics should be delayed. 372 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 373 374 /// Observe that we've started parsing a declaration. Access and 375 /// deprecation diagnostics will be delayed; when the declaration 376 /// is completed, all active delayed diagnostics will be evaluated 377 /// in its context, and then active diagnostics stack will be 378 /// popped down to the saved depth. 379 ParsingDeclState pushParsingDecl() { 380 ParsingDepth++; 381 382 ParsingDeclState state; 383 state.SavedStackSize = StackSize; 384 return state; 385 } 386 387 /// Observe that we're completed parsing a declaration. 388 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 389 390 /// Observe that we've started processing a different context, the 391 /// contents of which are semantically separate from the 392 /// declarations it may lexically appear in. This sets aside the 393 /// current stack of active diagnostics and starts afresh. 394 ProcessingContextState pushContext() { 395 assert(StackSize >= ActiveStackBase); 396 397 ProcessingContextState state; 398 state.SavedParsingDepth = ParsingDepth; 399 state.SavedActiveStackBase = ActiveStackBase; 400 401 ActiveStackBase = StackSize; 402 ParsingDepth = 0; 403 404 return state; 405 } 406 407 /// Observe that we've stopped processing a context. This 408 /// restores the previous stack of active diagnostics. 409 void popContext(ProcessingContextState state) { 410 assert(ActiveStackBase == StackSize); 411 assert(ParsingDepth == 0); 412 ActiveStackBase = state.SavedActiveStackBase; 413 ParsingDepth = state.SavedParsingDepth; 414 } 415 } DelayedDiagnostics; 416 417 /// A RAII object to temporarily push a declaration context. 418 class ContextRAII { 419 private: 420 Sema &S; 421 DeclContext *SavedContext; 422 ProcessingContextState SavedContextState; 423 424 public: 425 ContextRAII(Sema &S, DeclContext *ContextToPush) 426 : S(S), SavedContext(S.CurContext), 427 SavedContextState(S.DelayedDiagnostics.pushContext()) 428 { 429 assert(ContextToPush && "pushing null context"); 430 S.CurContext = ContextToPush; 431 } 432 433 void pop() { 434 if (!SavedContext) return; 435 S.CurContext = SavedContext; 436 S.DelayedDiagnostics.popContext(SavedContextState); 437 SavedContext = 0; 438 } 439 440 ~ContextRAII() { 441 pop(); 442 } 443 }; 444 445 /// WeakUndeclaredIdentifiers - Identifiers contained in 446 /// #pragma weak before declared. rare. may alias another 447 /// identifier, declared or undeclared 448 class WeakInfo { 449 IdentifierInfo *alias; // alias (optional) 450 SourceLocation loc; // for diagnostics 451 bool used; // identifier later declared? 452 public: 453 WeakInfo() 454 : alias(0), loc(SourceLocation()), used(false) {} 455 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 456 : alias(Alias), loc(Loc), used(false) {} 457 inline IdentifierInfo * getAlias() const { return alias; } 458 inline SourceLocation getLocation() const { return loc; } 459 void setUsed(bool Used=true) { used = Used; } 460 inline bool getUsed() { return used; } 461 bool operator==(WeakInfo RHS) const { 462 return alias == RHS.getAlias() && loc == RHS.getLocation(); 463 } 464 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 465 }; 466 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 467 468 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 469 /// #pragma weak during processing of other Decls. 470 /// I couldn't figure out a clean way to generate these in-line, so 471 /// we store them here and handle separately -- which is a hack. 472 /// It would be best to refactor this. 473 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 474 475 IdentifierResolver IdResolver; 476 477 /// Translation Unit Scope - useful to Objective-C actions that need 478 /// to lookup file scope declarations in the "ordinary" C decl namespace. 479 /// For example, user-defined classes, built-in "id" type, etc. 480 Scope *TUScope; 481 482 /// \brief The C++ "std" namespace, where the standard library resides. 483 LazyDeclPtr StdNamespace; 484 485 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 486 /// standard library. 487 LazyDeclPtr StdBadAlloc; 488 489 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 490 RecordDecl *CXXTypeInfoDecl; 491 492 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 493 RecordDecl *MSVCGuidDecl; 494 495 /// A flag to remember whether the implicit forms of operator new and delete 496 /// have been declared. 497 bool GlobalNewDeleteDeclared; 498 499 /// \brief The set of declarations that have been referenced within 500 /// a potentially evaluated expression. 501 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 502 PotentiallyReferencedDecls; 503 504 /// \brief A set of diagnostics that may be emitted. 505 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 506 PotentiallyEmittedDiagnostics; 507 508 /// \brief Describes how the expressions currently being parsed are 509 /// evaluated at run-time, if at all. 510 enum ExpressionEvaluationContext { 511 /// \brief The current expression and its subexpressions occur within an 512 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 513 /// or the subexpression of \c sizeof, where the type or the value of the 514 /// expression may be significant but no code will be generated to evaluate 515 /// the value of the expression at run time. 516 Unevaluated, 517 518 /// \brief The current expression is potentially evaluated at run time, 519 /// which means that code may be generated to evaluate the value of the 520 /// expression at run time. 521 PotentiallyEvaluated, 522 523 /// \brief The current expression may be potentially evaluated or it may 524 /// be unevaluated, but it is impossible to tell from the lexical context. 525 /// This evaluation context is used primary for the operand of the C++ 526 /// \c typeid expression, whose argument is potentially evaluated only when 527 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 528 PotentiallyPotentiallyEvaluated, 529 530 /// \brief The current expression is potentially evaluated, but any 531 /// declarations referenced inside that expression are only used if 532 /// in fact the current expression is used. 533 /// 534 /// This value is used when parsing default function arguments, for which 535 /// we would like to provide diagnostics (e.g., passing non-POD arguments 536 /// through varargs) but do not want to mark declarations as "referenced" 537 /// until the default argument is used. 538 PotentiallyEvaluatedIfUsed 539 }; 540 541 /// \brief Data structure used to record current or nested 542 /// expression evaluation contexts. 543 struct ExpressionEvaluationContextRecord { 544 /// \brief The expression evaluation context. 545 ExpressionEvaluationContext Context; 546 547 /// \brief The number of temporaries that were active when we 548 /// entered this expression evaluation context. 549 unsigned NumTemporaries; 550 551 /// \brief The set of declarations referenced within a 552 /// potentially potentially-evaluated context. 553 /// 554 /// When leaving a potentially potentially-evaluated context, each 555 /// of these elements will be as referenced if the corresponding 556 /// potentially potentially evaluated expression is potentially 557 /// evaluated. 558 PotentiallyReferencedDecls *PotentiallyReferenced; 559 560 /// \brief The set of diagnostics to emit should this potentially 561 /// potentially-evaluated context become evaluated. 562 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 563 564 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 565 unsigned NumTemporaries) 566 : Context(Context), NumTemporaries(NumTemporaries), 567 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 568 569 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 570 if (!PotentiallyReferenced) 571 PotentiallyReferenced = new PotentiallyReferencedDecls; 572 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 573 } 574 575 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 576 if (!PotentiallyDiagnosed) 577 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 578 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 579 } 580 581 void Destroy() { 582 delete PotentiallyReferenced; 583 delete PotentiallyDiagnosed; 584 PotentiallyReferenced = 0; 585 PotentiallyDiagnosed = 0; 586 } 587 }; 588 589 /// A stack of expression evaluation contexts. 590 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 591 592 /// \brief Whether the code handled by Sema should be considered a 593 /// complete translation unit or not. 594 /// 595 /// When true (which is generally the case), Sema will perform 596 /// end-of-translation-unit semantic tasks (such as creating 597 /// initializers for tentative definitions in C) once parsing has 598 /// completed. This flag will be false when building PCH files, 599 /// since a PCH file is by definition not a complete translation 600 /// unit. 601 bool CompleteTranslationUnit; 602 603 llvm::BumpPtrAllocator BumpAlloc; 604 605 /// \brief The number of SFINAE diagnostics that have been trapped. 606 unsigned NumSFINAEErrors; 607 608 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 609 UnparsedDefaultArgInstantiationsMap; 610 611 /// \brief A mapping from parameters with unparsed default arguments to the 612 /// set of instantiations of each parameter. 613 /// 614 /// This mapping is a temporary data structure used when parsing 615 /// nested class templates or nested classes of class templates, 616 /// where we might end up instantiating an inner class before the 617 /// default arguments of its methods have been parsed. 618 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 619 620 // Contains the locations of the beginning of unparsed default 621 // argument locations. 622 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 623 624 /// UndefinedInternals - all the used, undefined objects with 625 /// internal linkage in this translation unit. 626 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 627 628 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 629 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 630 631 /// Method Pool - allows efficient lookup when typechecking messages to "id". 632 /// We need to maintain a list, since selectors can have differing signatures 633 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 634 /// of selectors are "overloaded"). 635 GlobalMethodPool MethodPool; 636 637 /// Method selectors used in a @selector expression. Used for implementation 638 /// of -Wselector. 639 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 640 641 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 642 643 /// Private Helper predicate to check for 'self'. 644 bool isSelfExpr(Expr *RExpr); 645public: 646 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 647 bool CompleteTranslationUnit = true, 648 CodeCompleteConsumer *CompletionConsumer = 0); 649 ~Sema(); 650 651 /// \brief Perform initialization that occurs after the parser has been 652 /// initialized but before it parses anything. 653 void Initialize(); 654 655 const LangOptions &getLangOptions() const { return LangOpts; } 656 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 657 FPOptions &getFPOptions() { return FPFeatures; } 658 659 Diagnostic &getDiagnostics() const { return Diags; } 660 SourceManager &getSourceManager() const { return SourceMgr; } 661 const TargetAttributesSema &getTargetAttributesSema() const; 662 Preprocessor &getPreprocessor() const { return PP; } 663 ASTContext &getASTContext() const { return Context; } 664 ASTConsumer &getASTConsumer() const { return Consumer; } 665 ASTMutationListener *getASTMutationListener() const; 666 667 /// \brief Helper class that creates diagnostics with optional 668 /// template instantiation stacks. 669 /// 670 /// This class provides a wrapper around the basic DiagnosticBuilder 671 /// class that emits diagnostics. SemaDiagnosticBuilder is 672 /// responsible for emitting the diagnostic (as DiagnosticBuilder 673 /// does) and, if the diagnostic comes from inside a template 674 /// instantiation, printing the template instantiation stack as 675 /// well. 676 class SemaDiagnosticBuilder : public DiagnosticBuilder { 677 Sema &SemaRef; 678 unsigned DiagID; 679 680 public: 681 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 682 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 683 684 explicit SemaDiagnosticBuilder(Sema &SemaRef) 685 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 686 687 ~SemaDiagnosticBuilder(); 688 }; 689 690 /// \brief Emit a diagnostic. 691 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 692 693 /// \brief Emit a partial diagnostic. 694 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 695 696 /// \brief Build a partial diagnostic. 697 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 698 699 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 700 701 ExprResult Owned(Expr* E) { return E; } 702 ExprResult Owned(ExprResult R) { return R; } 703 StmtResult Owned(Stmt* S) { return S; } 704 705 void ActOnEndOfTranslationUnit(); 706 707 Scope *getScopeForContext(DeclContext *Ctx); 708 709 void PushFunctionScope(); 710 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 711 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 712 const Decl *D = 0, const BlockExpr *blkExpr = 0); 713 714 sema::FunctionScopeInfo *getCurFunction() const { 715 return FunctionScopes.back(); 716 } 717 718 bool hasAnyErrorsInThisFunction() const; 719 720 /// \brief Retrieve the current block, if any. 721 sema::BlockScopeInfo *getCurBlock(); 722 723 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 724 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 725 726 //===--------------------------------------------------------------------===// 727 // Type Analysis / Processing: SemaType.cpp. 728 // 729 730 QualType adjustParameterType(QualType T); 731 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 732 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 733 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 734 } 735 QualType BuildPointerType(QualType T, 736 SourceLocation Loc, DeclarationName Entity); 737 QualType BuildReferenceType(QualType T, bool LValueRef, 738 SourceLocation Loc, DeclarationName Entity); 739 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 740 Expr *ArraySize, unsigned Quals, 741 SourceRange Brackets, DeclarationName Entity); 742 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 743 SourceLocation AttrLoc); 744 QualType BuildFunctionType(QualType T, 745 QualType *ParamTypes, unsigned NumParamTypes, 746 bool Variadic, unsigned Quals, 747 RefQualifierKind RefQualifier, 748 SourceLocation Loc, DeclarationName Entity, 749 FunctionType::ExtInfo Info); 750 QualType BuildMemberPointerType(QualType T, QualType Class, 751 SourceLocation Loc, 752 DeclarationName Entity); 753 QualType BuildBlockPointerType(QualType T, 754 SourceLocation Loc, DeclarationName Entity); 755 QualType BuildParenType(QualType T); 756 757 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 758 TagDecl **OwnedDecl = 0, 759 bool AllowAutoInTypeName = false); 760 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 761 TypeSourceInfo *ReturnTypeInfo); 762 /// \brief Package the given type and TSI into a ParsedType. 763 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 764 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 765 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 766 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 767 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 768 bool CheckDistantExceptionSpec(QualType T); 769 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 770 bool CheckEquivalentExceptionSpec( 771 const FunctionProtoType *Old, SourceLocation OldLoc, 772 const FunctionProtoType *New, SourceLocation NewLoc); 773 bool CheckEquivalentExceptionSpec( 774 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 775 const FunctionProtoType *Old, SourceLocation OldLoc, 776 const FunctionProtoType *New, SourceLocation NewLoc, 777 bool *MissingExceptionSpecification = 0, 778 bool *MissingEmptyExceptionSpecification = 0, 779 bool AllowNoexceptAllMatchWithNoSpec = false, 780 bool IsOperatorNew = false); 781 bool CheckExceptionSpecSubset( 782 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 783 const FunctionProtoType *Superset, SourceLocation SuperLoc, 784 const FunctionProtoType *Subset, SourceLocation SubLoc); 785 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 786 const FunctionProtoType *Target, SourceLocation TargetLoc, 787 const FunctionProtoType *Source, SourceLocation SourceLoc); 788 789 TypeResult ActOnTypeName(Scope *S, Declarator &D); 790 791 bool RequireCompleteType(SourceLocation Loc, QualType T, 792 const PartialDiagnostic &PD, 793 std::pair<SourceLocation, PartialDiagnostic> Note); 794 bool RequireCompleteType(SourceLocation Loc, QualType T, 795 const PartialDiagnostic &PD); 796 bool RequireCompleteType(SourceLocation Loc, QualType T, 797 unsigned DiagID); 798 799 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 800 const CXXScopeSpec &SS, QualType T); 801 802 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 803 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 804 805 //===--------------------------------------------------------------------===// 806 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 807 // 808 809 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 810 811 void DiagnoseUseOfUnimplementedSelectors(); 812 813 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 814 Scope *S, CXXScopeSpec *SS = 0, 815 bool isClassName = false, 816 bool HasTrailingDot = false, 817 ParsedType ObjectType = ParsedType(), 818 bool WantNontrivialTypeSourceInfo = false); 819 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 820 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 821 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 822 SourceLocation IILoc, 823 Scope *S, 824 CXXScopeSpec *SS, 825 ParsedType &SuggestedType); 826 827 /// \brief Describes the result of the name lookup and resolution performed 828 /// by \c ClassifyName(). 829 enum NameClassificationKind { 830 NC_Unknown, 831 NC_Error, 832 NC_Keyword, 833 NC_Type, 834 NC_Expression, 835 NC_NestedNameSpecifier, 836 NC_TypeTemplate, 837 NC_FunctionTemplate 838 }; 839 840 class NameClassification { 841 NameClassificationKind Kind; 842 ExprResult Expr; 843 TemplateName Template; 844 ParsedType Type; 845 const IdentifierInfo *Keyword; 846 847 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 848 849 public: 850 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 851 852 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 853 854 NameClassification(const IdentifierInfo *Keyword) 855 : Kind(NC_Keyword), Keyword(Keyword) { } 856 857 static NameClassification Error() { 858 return NameClassification(NC_Error); 859 } 860 861 static NameClassification Unknown() { 862 return NameClassification(NC_Unknown); 863 } 864 865 static NameClassification NestedNameSpecifier() { 866 return NameClassification(NC_NestedNameSpecifier); 867 } 868 869 static NameClassification TypeTemplate(TemplateName Name) { 870 NameClassification Result(NC_TypeTemplate); 871 Result.Template = Name; 872 return Result; 873 } 874 875 static NameClassification FunctionTemplate(TemplateName Name) { 876 NameClassification Result(NC_FunctionTemplate); 877 Result.Template = Name; 878 return Result; 879 } 880 881 NameClassificationKind getKind() const { return Kind; } 882 883 ParsedType getType() const { 884 assert(Kind == NC_Type); 885 return Type; 886 } 887 888 ExprResult getExpression() const { 889 assert(Kind == NC_Expression); 890 return Expr; 891 } 892 893 TemplateName getTemplateName() const { 894 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 895 return Template; 896 } 897 898 TemplateNameKind getTemplateNameKind() const { 899 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 900 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 901 } 902}; 903 904 /// \brief Perform name lookup on the given name, classifying it based on 905 /// the results of name lookup and the following token. 906 /// 907 /// This routine is used by the parser to resolve identifiers and help direct 908 /// parsing. When the identifier cannot be found, this routine will attempt 909 /// to correct the typo and classify based on the resulting name. 910 /// 911 /// \param S The scope in which we're performing name lookup. 912 /// 913 /// \param SS The nested-name-specifier that precedes the name. 914 /// 915 /// \param Name The identifier. If typo correction finds an alternative name, 916 /// this pointer parameter will be updated accordingly. 917 /// 918 /// \param NameLoc The location of the identifier. 919 /// 920 /// \param NextToken The token following the identifier. Used to help 921 /// disambiguate the name. 922 NameClassification ClassifyName(Scope *S, 923 CXXScopeSpec &SS, 924 IdentifierInfo *&Name, 925 SourceLocation NameLoc, 926 const Token &NextToken); 927 928 Decl *ActOnDeclarator(Scope *S, Declarator &D); 929 930 Decl *HandleDeclarator(Scope *S, Declarator &D, 931 MultiTemplateParamsArg TemplateParameterLists, 932 bool IsFunctionDefinition); 933 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 934 const LookupResult &Previous, 935 Scope *S); 936 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 937 void DiagnoseFunctionSpecifiers(Declarator& D); 938 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 939 void CheckShadow(Scope *S, VarDecl *D); 940 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 941 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 942 QualType R, TypeSourceInfo *TInfo, 943 LookupResult &Previous, bool &Redeclaration); 944 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 945 LookupResult &Previous, bool &Redeclaration); 946 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 947 QualType R, TypeSourceInfo *TInfo, 948 LookupResult &Previous, 949 MultiTemplateParamsArg TemplateParamLists, 950 bool &Redeclaration); 951 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 952 bool &Redeclaration); 953 void CheckCompleteVariableDeclaration(VarDecl *var); 954 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 955 QualType R, TypeSourceInfo *TInfo, 956 LookupResult &Previous, 957 MultiTemplateParamsArg TemplateParamLists, 958 bool IsFunctionDefinition, 959 bool &Redeclaration); 960 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 961 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 962 void CheckFunctionDeclaration(Scope *S, 963 FunctionDecl *NewFD, LookupResult &Previous, 964 bool IsExplicitSpecialization, 965 bool &Redeclaration); 966 void CheckMain(FunctionDecl *FD); 967 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 968 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 969 SourceLocation Loc, 970 QualType T); 971 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 972 SourceLocation NameLoc, IdentifierInfo *Name, 973 QualType T, TypeSourceInfo *TSInfo, 974 StorageClass SC, StorageClass SCAsWritten); 975 void ActOnParamDefaultArgument(Decl *param, 976 SourceLocation EqualLoc, 977 Expr *defarg); 978 void ActOnParamUnparsedDefaultArgument(Decl *param, 979 SourceLocation EqualLoc, 980 SourceLocation ArgLoc); 981 void ActOnParamDefaultArgumentError(Decl *param); 982 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 983 SourceLocation EqualLoc); 984 985 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 986 bool TypeMayContainAuto); 987 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 988 void ActOnInitializerError(Decl *Dcl); 989 void ActOnCXXForRangeDecl(Decl *D); 990 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 991 void FinalizeDeclaration(Decl *D); 992 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 993 Decl **Group, 994 unsigned NumDecls); 995 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 996 bool TypeMayContainAuto = true); 997 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 998 SourceLocation LocAfterDecls); 999 void CheckForFunctionRedefinition(FunctionDecl *FD); 1000 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1001 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1002 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1003 1004 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1005 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1006 1007 /// \brief Diagnose any unused parameters in the given sequence of 1008 /// ParmVarDecl pointers. 1009 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1010 ParmVarDecl * const *End); 1011 1012 /// \brief Diagnose whether the size of parameters or return value of a 1013 /// function or obj-c method definition is pass-by-value and larger than a 1014 /// specified threshold. 1015 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1016 ParmVarDecl * const *End, 1017 QualType ReturnTy, 1018 NamedDecl *D); 1019 1020 void DiagnoseInvalidJumps(Stmt *Body); 1021 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1022 SourceLocation AsmLoc, 1023 SourceLocation RParenLoc); 1024 1025 /// Scope actions. 1026 void ActOnPopScope(SourceLocation Loc, Scope *S); 1027 void ActOnTranslationUnitScope(Scope *S); 1028 1029 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 1030 /// no declarator (e.g. "struct foo;") is parsed. 1031 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1032 DeclSpec &DS); 1033 1034 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1035 1036 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1037 AccessSpecifier AS, 1038 RecordDecl *Record); 1039 1040 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1041 RecordDecl *Record); 1042 1043 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1044 TagTypeKind NewTag, 1045 SourceLocation NewTagLoc, 1046 const IdentifierInfo &Name); 1047 1048 enum TagUseKind { 1049 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1050 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1051 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1052 TUK_Friend // Friend declaration: 'friend struct foo;' 1053 }; 1054 1055 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1056 SourceLocation KWLoc, CXXScopeSpec &SS, 1057 IdentifierInfo *Name, SourceLocation NameLoc, 1058 AttributeList *Attr, AccessSpecifier AS, 1059 MultiTemplateParamsArg TemplateParameterLists, 1060 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1061 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1062 1063 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1064 unsigned TagSpec, SourceLocation TagLoc, 1065 CXXScopeSpec &SS, 1066 IdentifierInfo *Name, SourceLocation NameLoc, 1067 AttributeList *Attr, 1068 MultiTemplateParamsArg TempParamLists); 1069 1070 TypeResult ActOnDependentTag(Scope *S, 1071 unsigned TagSpec, 1072 TagUseKind TUK, 1073 const CXXScopeSpec &SS, 1074 IdentifierInfo *Name, 1075 SourceLocation TagLoc, 1076 SourceLocation NameLoc); 1077 1078 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1079 IdentifierInfo *ClassName, 1080 llvm::SmallVectorImpl<Decl *> &Decls); 1081 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1082 Declarator &D, Expr *BitfieldWidth); 1083 1084 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1085 Declarator &D, Expr *BitfieldWidth, 1086 AccessSpecifier AS); 1087 1088 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1089 TypeSourceInfo *TInfo, 1090 RecordDecl *Record, SourceLocation Loc, 1091 bool Mutable, Expr *BitfieldWidth, 1092 SourceLocation TSSL, 1093 AccessSpecifier AS, NamedDecl *PrevDecl, 1094 Declarator *D = 0); 1095 1096 enum CXXSpecialMember { 1097 CXXInvalid = -1, 1098 CXXConstructor = 0, 1099 CXXCopyConstructor = 1, 1100 CXXCopyAssignment = 2, 1101 CXXDestructor = 3 1102 }; 1103 bool CheckNontrivialField(FieldDecl *FD); 1104 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1105 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1106 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1107 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 1108 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1109 Declarator &D, Expr *BitfieldWidth, 1110 tok::ObjCKeywordKind visibility); 1111 1112 // This is used for both record definitions and ObjC interface declarations. 1113 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1114 Decl **Fields, unsigned NumFields, 1115 SourceLocation LBrac, SourceLocation RBrac, 1116 AttributeList *AttrList); 1117 1118 /// ActOnTagStartDefinition - Invoked when we have entered the 1119 /// scope of a tag's definition (e.g., for an enumeration, class, 1120 /// struct, or union). 1121 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1122 1123 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1124 /// C++ record definition's base-specifiers clause and are starting its 1125 /// member declarations. 1126 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1127 SourceLocation FinalLoc, 1128 SourceLocation LBraceLoc); 1129 1130 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1131 /// the definition of a tag (enumeration, class, struct, or union). 1132 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1133 SourceLocation RBraceLoc); 1134 1135 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1136 /// error parsing the definition of a tag. 1137 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1138 1139 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1140 EnumConstantDecl *LastEnumConst, 1141 SourceLocation IdLoc, 1142 IdentifierInfo *Id, 1143 Expr *val); 1144 1145 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1146 SourceLocation IdLoc, IdentifierInfo *Id, 1147 AttributeList *Attrs, 1148 SourceLocation EqualLoc, Expr *Val); 1149 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1150 SourceLocation RBraceLoc, Decl *EnumDecl, 1151 Decl **Elements, unsigned NumElements, 1152 Scope *S, AttributeList *Attr); 1153 1154 DeclContext *getContainingDC(DeclContext *DC); 1155 1156 /// Set the current declaration context until it gets popped. 1157 void PushDeclContext(Scope *S, DeclContext *DC); 1158 void PopDeclContext(); 1159 1160 /// EnterDeclaratorContext - Used when we must lookup names in the context 1161 /// of a declarator's nested name specifier. 1162 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1163 void ExitDeclaratorContext(Scope *S); 1164 1165 DeclContext *getFunctionLevelDeclContext(); 1166 1167 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1168 /// to the function decl for the function being parsed. If we're currently 1169 /// in a 'block', this returns the containing context. 1170 FunctionDecl *getCurFunctionDecl(); 1171 1172 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1173 /// the method decl for the method being parsed. If we're currently 1174 /// in a 'block', this returns the containing context. 1175 ObjCMethodDecl *getCurMethodDecl(); 1176 1177 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1178 /// or C function we're in, otherwise return null. If we're currently 1179 /// in a 'block', this returns the containing context. 1180 NamedDecl *getCurFunctionOrMethodDecl(); 1181 1182 /// Add this decl to the scope shadowed decl chains. 1183 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1184 1185 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1186 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1187 /// true if 'D' belongs to the given declaration context. 1188 /// 1189 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1190 /// whether the declaration is in scope for the purposes of explicit template 1191 /// instantiation or specialization. The default is false. 1192 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1193 bool ExplicitInstantiationOrSpecialization = false); 1194 1195 /// Finds the scope corresponding to the given decl context, if it 1196 /// happens to be an enclosing scope. Otherwise return NULL. 1197 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1198 1199 /// Subroutines of ActOnDeclarator(). 1200 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1201 TypeSourceInfo *TInfo); 1202 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1203 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1204 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1205 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1206 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1207 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1208 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1209 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1210 1211 // AssignmentAction - This is used by all the assignment diagnostic functions 1212 // to represent what is actually causing the operation 1213 enum AssignmentAction { 1214 AA_Assigning, 1215 AA_Passing, 1216 AA_Returning, 1217 AA_Converting, 1218 AA_Initializing, 1219 AA_Sending, 1220 AA_Casting 1221 }; 1222 1223 /// C++ Overloading. 1224 enum OverloadKind { 1225 /// This is a legitimate overload: the existing declarations are 1226 /// functions or function templates with different signatures. 1227 Ovl_Overload, 1228 1229 /// This is not an overload because the signature exactly matches 1230 /// an existing declaration. 1231 Ovl_Match, 1232 1233 /// This is not an overload because the lookup results contain a 1234 /// non-function. 1235 Ovl_NonFunction 1236 }; 1237 OverloadKind CheckOverload(Scope *S, 1238 FunctionDecl *New, 1239 const LookupResult &OldDecls, 1240 NamedDecl *&OldDecl, 1241 bool IsForUsingDecl); 1242 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1243 1244 bool TryImplicitConversion(InitializationSequence &Sequence, 1245 const InitializedEntity &Entity, 1246 Expr *From, 1247 bool SuppressUserConversions, 1248 bool AllowExplicit, 1249 bool InOverloadResolution, 1250 bool CStyle); 1251 1252 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1253 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1254 bool IsComplexPromotion(QualType FromType, QualType ToType); 1255 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1256 bool InOverloadResolution, 1257 QualType& ConvertedType, bool &IncompatibleObjC); 1258 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1259 QualType& ConvertedType, bool &IncompatibleObjC); 1260 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1261 QualType& ConvertedType); 1262 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1263 const FunctionProtoType *NewType); 1264 1265 bool CheckPointerConversion(Expr *From, QualType ToType, 1266 CastKind &Kind, 1267 CXXCastPath& BasePath, 1268 bool IgnoreBaseAccess); 1269 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1270 bool InOverloadResolution, 1271 QualType &ConvertedType); 1272 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1273 CastKind &Kind, 1274 CXXCastPath &BasePath, 1275 bool IgnoreBaseAccess); 1276 bool IsQualificationConversion(QualType FromType, QualType ToType, 1277 bool CStyle); 1278 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1279 1280 1281 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1282 const VarDecl *NRVOCandidate, 1283 QualType ResultType, 1284 Expr *Value); 1285 1286 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1287 SourceLocation EqualLoc, 1288 ExprResult Init); 1289 ExprResult PerformObjectArgumentInitialization(Expr *From, 1290 NestedNameSpecifier *Qualifier, 1291 NamedDecl *FoundDecl, 1292 CXXMethodDecl *Method); 1293 1294 ExprResult PerformContextuallyConvertToBool(Expr *From); 1295 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1296 1297 ExprResult 1298 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1299 const PartialDiagnostic &NotIntDiag, 1300 const PartialDiagnostic &IncompleteDiag, 1301 const PartialDiagnostic &ExplicitConvDiag, 1302 const PartialDiagnostic &ExplicitConvNote, 1303 const PartialDiagnostic &AmbigDiag, 1304 const PartialDiagnostic &AmbigNote, 1305 const PartialDiagnostic &ConvDiag); 1306 1307 ExprResult PerformObjectMemberConversion(Expr *From, 1308 NestedNameSpecifier *Qualifier, 1309 NamedDecl *FoundDecl, 1310 NamedDecl *Member); 1311 1312 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1313 // TODO: make this is a typesafe union. 1314 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1315 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1316 1317 void AddOverloadCandidate(NamedDecl *Function, 1318 DeclAccessPair FoundDecl, 1319 Expr **Args, unsigned NumArgs, 1320 OverloadCandidateSet &CandidateSet); 1321 1322 void AddOverloadCandidate(FunctionDecl *Function, 1323 DeclAccessPair FoundDecl, 1324 Expr **Args, unsigned NumArgs, 1325 OverloadCandidateSet& CandidateSet, 1326 bool SuppressUserConversions = false, 1327 bool PartialOverloading = false); 1328 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1329 Expr **Args, unsigned NumArgs, 1330 OverloadCandidateSet& CandidateSet, 1331 bool SuppressUserConversions = false); 1332 void AddMethodCandidate(DeclAccessPair FoundDecl, 1333 QualType ObjectType, 1334 Expr::Classification ObjectClassification, 1335 Expr **Args, unsigned NumArgs, 1336 OverloadCandidateSet& CandidateSet, 1337 bool SuppressUserConversion = false); 1338 void AddMethodCandidate(CXXMethodDecl *Method, 1339 DeclAccessPair FoundDecl, 1340 CXXRecordDecl *ActingContext, QualType ObjectType, 1341 Expr::Classification ObjectClassification, 1342 Expr **Args, unsigned NumArgs, 1343 OverloadCandidateSet& CandidateSet, 1344 bool SuppressUserConversions = false); 1345 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1346 DeclAccessPair FoundDecl, 1347 CXXRecordDecl *ActingContext, 1348 TemplateArgumentListInfo *ExplicitTemplateArgs, 1349 QualType ObjectType, 1350 Expr::Classification ObjectClassification, 1351 Expr **Args, unsigned NumArgs, 1352 OverloadCandidateSet& CandidateSet, 1353 bool SuppressUserConversions = false); 1354 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1355 DeclAccessPair FoundDecl, 1356 TemplateArgumentListInfo *ExplicitTemplateArgs, 1357 Expr **Args, unsigned NumArgs, 1358 OverloadCandidateSet& CandidateSet, 1359 bool SuppressUserConversions = false); 1360 void AddConversionCandidate(CXXConversionDecl *Conversion, 1361 DeclAccessPair FoundDecl, 1362 CXXRecordDecl *ActingContext, 1363 Expr *From, QualType ToType, 1364 OverloadCandidateSet& CandidateSet); 1365 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1366 DeclAccessPair FoundDecl, 1367 CXXRecordDecl *ActingContext, 1368 Expr *From, QualType ToType, 1369 OverloadCandidateSet &CandidateSet); 1370 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1371 DeclAccessPair FoundDecl, 1372 CXXRecordDecl *ActingContext, 1373 const FunctionProtoType *Proto, 1374 Expr *Object, Expr **Args, unsigned NumArgs, 1375 OverloadCandidateSet& CandidateSet); 1376 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1377 SourceLocation OpLoc, 1378 Expr **Args, unsigned NumArgs, 1379 OverloadCandidateSet& CandidateSet, 1380 SourceRange OpRange = SourceRange()); 1381 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1382 Expr **Args, unsigned NumArgs, 1383 OverloadCandidateSet& CandidateSet, 1384 bool IsAssignmentOperator = false, 1385 unsigned NumContextualBoolArguments = 0); 1386 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1387 SourceLocation OpLoc, 1388 Expr **Args, unsigned NumArgs, 1389 OverloadCandidateSet& CandidateSet); 1390 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1391 bool Operator, 1392 Expr **Args, unsigned NumArgs, 1393 TemplateArgumentListInfo *ExplicitTemplateArgs, 1394 OverloadCandidateSet& CandidateSet, 1395 bool PartialOverloading = false, 1396 bool StdNamespaceIsAssociated = false); 1397 1398 // Emit as a 'note' the specific overload candidate 1399 void NoteOverloadCandidate(FunctionDecl *Fn); 1400 1401 // Emit as a series of 'note's all template and non-templates 1402 // identified by the expression Expr 1403 void NoteAllOverloadCandidates(Expr* E); 1404 1405 // [PossiblyAFunctionType] --> [Return] 1406 // NonFunctionType --> NonFunctionType 1407 // R (A) --> R(A) 1408 // R (*)(A) --> R (A) 1409 // R (&)(A) --> R (A) 1410 // R (S::*)(A) --> R (A) 1411 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1412 1413 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1414 bool Complain, 1415 DeclAccessPair &Found); 1416 1417 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1418 bool Complain = false, 1419 DeclAccessPair* Found = 0); 1420 1421 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1422 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1423 bool Complain = false, 1424 const SourceRange& OpRangeForComplaining = SourceRange(), 1425 QualType DestTypeForComplaining = QualType(), 1426 unsigned DiagIDForComplaining = 0); 1427 1428 1429 Expr *FixOverloadedFunctionReference(Expr *E, 1430 DeclAccessPair FoundDecl, 1431 FunctionDecl *Fn); 1432 ExprResult FixOverloadedFunctionReference(ExprResult, 1433 DeclAccessPair FoundDecl, 1434 FunctionDecl *Fn); 1435 1436 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1437 Expr **Args, unsigned NumArgs, 1438 OverloadCandidateSet &CandidateSet, 1439 bool PartialOverloading = false); 1440 1441 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1442 UnresolvedLookupExpr *ULE, 1443 SourceLocation LParenLoc, 1444 Expr **Args, unsigned NumArgs, 1445 SourceLocation RParenLoc, 1446 Expr *ExecConfig); 1447 1448 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1449 unsigned Opc, 1450 const UnresolvedSetImpl &Fns, 1451 Expr *input); 1452 1453 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1454 unsigned Opc, 1455 const UnresolvedSetImpl &Fns, 1456 Expr *LHS, Expr *RHS); 1457 1458 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1459 SourceLocation RLoc, 1460 Expr *Base,Expr *Idx); 1461 1462 ExprResult 1463 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1464 SourceLocation LParenLoc, Expr **Args, 1465 unsigned NumArgs, SourceLocation RParenLoc); 1466 ExprResult 1467 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1468 Expr **Args, unsigned NumArgs, 1469 SourceLocation RParenLoc); 1470 1471 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1472 SourceLocation OpLoc); 1473 1474 /// CheckCallReturnType - Checks that a call expression's return type is 1475 /// complete. Returns true on failure. The location passed in is the location 1476 /// that best represents the call. 1477 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1478 CallExpr *CE, FunctionDecl *FD); 1479 1480 /// Helpers for dealing with blocks and functions. 1481 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1482 bool CheckParameterNames); 1483 void CheckCXXDefaultArguments(FunctionDecl *FD); 1484 void CheckExtraCXXDefaultArguments(Declarator &D); 1485 Scope *getNonFieldDeclScope(Scope *S); 1486 1487 /// \name Name lookup 1488 /// 1489 /// These routines provide name lookup that is used during semantic 1490 /// analysis to resolve the various kinds of names (identifiers, 1491 /// overloaded operator names, constructor names, etc.) into zero or 1492 /// more declarations within a particular scope. The major entry 1493 /// points are LookupName, which performs unqualified name lookup, 1494 /// and LookupQualifiedName, which performs qualified name lookup. 1495 /// 1496 /// All name lookup is performed based on some specific criteria, 1497 /// which specify what names will be visible to name lookup and how 1498 /// far name lookup should work. These criteria are important both 1499 /// for capturing language semantics (certain lookups will ignore 1500 /// certain names, for example) and for performance, since name 1501 /// lookup is often a bottleneck in the compilation of C++. Name 1502 /// lookup criteria is specified via the LookupCriteria enumeration. 1503 /// 1504 /// The results of name lookup can vary based on the kind of name 1505 /// lookup performed, the current language, and the translation 1506 /// unit. In C, for example, name lookup will either return nothing 1507 /// (no entity found) or a single declaration. In C++, name lookup 1508 /// can additionally refer to a set of overloaded functions or 1509 /// result in an ambiguity. All of the possible results of name 1510 /// lookup are captured by the LookupResult class, which provides 1511 /// the ability to distinguish among them. 1512 //@{ 1513 1514 /// @brief Describes the kind of name lookup to perform. 1515 enum LookupNameKind { 1516 /// Ordinary name lookup, which finds ordinary names (functions, 1517 /// variables, typedefs, etc.) in C and most kinds of names 1518 /// (functions, variables, members, types, etc.) in C++. 1519 LookupOrdinaryName = 0, 1520 /// Tag name lookup, which finds the names of enums, classes, 1521 /// structs, and unions. 1522 LookupTagName, 1523 /// Label name lookup. 1524 LookupLabel, 1525 /// Member name lookup, which finds the names of 1526 /// class/struct/union members. 1527 LookupMemberName, 1528 /// Look up of an operator name (e.g., operator+) for use with 1529 /// operator overloading. This lookup is similar to ordinary name 1530 /// lookup, but will ignore any declarations that are class members. 1531 LookupOperatorName, 1532 /// Look up of a name that precedes the '::' scope resolution 1533 /// operator in C++. This lookup completely ignores operator, object, 1534 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1535 LookupNestedNameSpecifierName, 1536 /// Look up a namespace name within a C++ using directive or 1537 /// namespace alias definition, ignoring non-namespace names (C++ 1538 /// [basic.lookup.udir]p1). 1539 LookupNamespaceName, 1540 /// Look up all declarations in a scope with the given name, 1541 /// including resolved using declarations. This is appropriate 1542 /// for checking redeclarations for a using declaration. 1543 LookupUsingDeclName, 1544 /// Look up an ordinary name that is going to be redeclared as a 1545 /// name with linkage. This lookup ignores any declarations that 1546 /// are outside of the current scope unless they have linkage. See 1547 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1548 LookupRedeclarationWithLinkage, 1549 /// Look up the name of an Objective-C protocol. 1550 LookupObjCProtocolName, 1551 /// \brief Look up any declaration with any name. 1552 LookupAnyName 1553 }; 1554 1555 /// \brief Specifies whether (or how) name lookup is being performed for a 1556 /// redeclaration (vs. a reference). 1557 enum RedeclarationKind { 1558 /// \brief The lookup is a reference to this name that is not for the 1559 /// purpose of redeclaring the name. 1560 NotForRedeclaration = 0, 1561 /// \brief The lookup results will be used for redeclaration of a name, 1562 /// if an entity by that name already exists. 1563 ForRedeclaration 1564 }; 1565 1566private: 1567 bool CppLookupName(LookupResult &R, Scope *S); 1568 1569public: 1570 /// \brief Look up a name, looking for a single declaration. Return 1571 /// null if the results were absent, ambiguous, or overloaded. 1572 /// 1573 /// It is preferable to use the elaborated form and explicitly handle 1574 /// ambiguity and overloaded. 1575 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1576 SourceLocation Loc, 1577 LookupNameKind NameKind, 1578 RedeclarationKind Redecl 1579 = NotForRedeclaration); 1580 bool LookupName(LookupResult &R, Scope *S, 1581 bool AllowBuiltinCreation = false); 1582 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1583 bool InUnqualifiedLookup = false); 1584 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1585 bool AllowBuiltinCreation = false, 1586 bool EnteringContext = false); 1587 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1588 1589 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1590 QualType T1, QualType T2, 1591 UnresolvedSetImpl &Functions); 1592 1593 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1594 SourceLocation GnuLabelLoc = SourceLocation()); 1595 1596 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1597 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1598 1599 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1600 Expr **Args, unsigned NumArgs, 1601 ADLResult &Functions, 1602 bool StdNamespaceIsAssociated = false); 1603 1604 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1605 VisibleDeclConsumer &Consumer, 1606 bool IncludeGlobalScope = true); 1607 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1608 VisibleDeclConsumer &Consumer, 1609 bool IncludeGlobalScope = true); 1610 1611 /// \brief The context in which typo-correction occurs. 1612 /// 1613 /// The typo-correction context affects which keywords (if any) are 1614 /// considered when trying to correct for typos. 1615 enum CorrectTypoContext { 1616 /// \brief An unknown context, where any keyword might be valid. 1617 CTC_Unknown, 1618 /// \brief A context where no keywords are used (e.g. we expect an actual 1619 /// name). 1620 CTC_NoKeywords, 1621 /// \brief A context where we're correcting a type name. 1622 CTC_Type, 1623 /// \brief An expression context. 1624 CTC_Expression, 1625 /// \brief A type cast, or anything else that can be followed by a '<'. 1626 CTC_CXXCasts, 1627 /// \brief A member lookup context. 1628 CTC_MemberLookup, 1629 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1630 CTC_ObjCIvarLookup, 1631 /// \brief An Objective-C property lookup context (e.g., self.prop). 1632 CTC_ObjCPropertyLookup, 1633 /// \brief The receiver of an Objective-C message send within an 1634 /// Objective-C method where 'super' is a valid keyword. 1635 CTC_ObjCMessageReceiver 1636 }; 1637 1638 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1639 DeclContext *MemberContext = 0, 1640 bool EnteringContext = false, 1641 CorrectTypoContext CTC = CTC_Unknown, 1642 const ObjCObjectPointerType *OPT = 0); 1643 1644 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1645 AssociatedNamespaceSet &AssociatedNamespaces, 1646 AssociatedClassSet &AssociatedClasses); 1647 1648 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1649 //@} 1650 1651 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1652 SourceLocation IdLoc, 1653 bool TypoCorrection = false); 1654 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1655 Scope *S, bool ForRedeclaration, 1656 SourceLocation Loc); 1657 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1658 Scope *S); 1659 void AddKnownFunctionAttributes(FunctionDecl *FD); 1660 1661 // More parsing and symbol table subroutines. 1662 1663 // Decl attributes - this routine is the top level dispatcher. 1664 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1665 bool NonInheritable = true, bool Inheritable = true); 1666 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1667 bool NonInheritable = true, bool Inheritable = true); 1668 1669 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1670 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1671 bool CheckNoReturnAttr(const AttributeList &attr); 1672 1673 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1674 bool &IncompleteImpl, unsigned DiagID); 1675 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1676 ObjCMethodDecl *MethodDecl, 1677 bool IsProtocolMethodDecl); 1678 1679 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1680 ObjCInterfaceDecl *IDecl); 1681 1682 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1683 1684 /// CheckProtocolMethodDefs - This routine checks unimplemented 1685 /// methods declared in protocol, and those referenced by it. 1686 /// \param IDecl - Used for checking for methods which may have been 1687 /// inherited. 1688 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1689 ObjCProtocolDecl *PDecl, 1690 bool& IncompleteImpl, 1691 const SelectorSet &InsMap, 1692 const SelectorSet &ClsMap, 1693 ObjCContainerDecl *CDecl); 1694 1695 /// CheckImplementationIvars - This routine checks if the instance variables 1696 /// listed in the implelementation match those listed in the interface. 1697 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1698 ObjCIvarDecl **Fields, unsigned nIvars, 1699 SourceLocation Loc); 1700 1701 /// \brief Determine whether we can synthesize a provisional ivar for the 1702 /// given name. 1703 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1704 1705 /// \brief Determine whether we can synthesize a provisional ivar for the 1706 /// given property. 1707 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1708 1709 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1710 /// remains unimplemented in the class or category @implementation. 1711 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1712 ObjCContainerDecl* IDecl, 1713 bool IncompleteImpl = false); 1714 1715 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1716 /// which must be implemented by this implementation. 1717 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1718 ObjCContainerDecl *CDecl, 1719 const SelectorSet &InsMap); 1720 1721 /// DefaultSynthesizeProperties - This routine default synthesizes all 1722 /// properties which must be synthesized in class's @implementation. 1723 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1724 ObjCInterfaceDecl *IDecl); 1725 1726 /// CollectImmediateProperties - This routine collects all properties in 1727 /// the class and its conforming protocols; but not those it its super class. 1728 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1729 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1730 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1731 1732 1733 /// LookupPropertyDecl - Looks up a property in the current class and all 1734 /// its protocols. 1735 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1736 IdentifierInfo *II); 1737 1738 /// Called by ActOnProperty to handle @property declarations in 1739 //// class extensions. 1740 Decl *HandlePropertyInClassExtension(Scope *S, 1741 ObjCCategoryDecl *CDecl, 1742 SourceLocation AtLoc, 1743 FieldDeclarator &FD, 1744 Selector GetterSel, 1745 Selector SetterSel, 1746 const bool isAssign, 1747 const bool isReadWrite, 1748 const unsigned Attributes, 1749 bool *isOverridingProperty, 1750 TypeSourceInfo *T, 1751 tok::ObjCKeywordKind MethodImplKind); 1752 1753 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1754 /// handle creating the ObjcPropertyDecl for a category or @interface. 1755 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1756 ObjCContainerDecl *CDecl, 1757 SourceLocation AtLoc, 1758 FieldDeclarator &FD, 1759 Selector GetterSel, 1760 Selector SetterSel, 1761 const bool isAssign, 1762 const bool isReadWrite, 1763 const unsigned Attributes, 1764 TypeSourceInfo *T, 1765 tok::ObjCKeywordKind MethodImplKind, 1766 DeclContext *lexicalDC = 0); 1767 1768 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1769 /// warning) when atomic property has one but not the other user-declared 1770 /// setter or getter. 1771 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1772 ObjCContainerDecl* IDecl); 1773 1774 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1775 1776 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1777 /// true, or false, accordingly. 1778 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1779 const ObjCMethodDecl *PrevMethod, 1780 bool matchBasedOnSizeAndAlignment = false, 1781 bool matchBasedOnStrictEqulity = false); 1782 1783 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1784 /// or protocol against those declared in their implementations. 1785 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1786 const SelectorSet &ClsMap, 1787 SelectorSet &InsMapSeen, 1788 SelectorSet &ClsMapSeen, 1789 ObjCImplDecl* IMPDecl, 1790 ObjCContainerDecl* IDecl, 1791 bool &IncompleteImpl, 1792 bool ImmediateClass); 1793 1794private: 1795 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1796 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1797 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1798 1799 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1800 /// optionally warns if there are multiple signatures. 1801 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1802 bool receiverIdOrClass, 1803 bool warn, bool instance); 1804 1805public: 1806 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1807 /// unit are added to a global pool. This allows us to efficiently associate 1808 /// a selector with a method declaraation for purposes of typechecking 1809 /// messages sent to "id" (where the class of the object is unknown). 1810 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1811 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1812 } 1813 1814 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1815 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1816 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1817 } 1818 1819 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1820 /// there are multiple signatures. 1821 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1822 bool receiverIdOrClass=false, 1823 bool warn=true) { 1824 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1825 warn, /*instance*/true); 1826 } 1827 1828 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1829 /// there are multiple signatures. 1830 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1831 bool receiverIdOrClass=false, 1832 bool warn=true) { 1833 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1834 warn, /*instance*/false); 1835 } 1836 1837 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1838 /// implementation. 1839 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1840 1841 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1842 /// initialization. 1843 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1844 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1845 1846 //===--------------------------------------------------------------------===// 1847 // Statement Parsing Callbacks: SemaStmt.cpp. 1848public: 1849 class FullExprArg { 1850 public: 1851 FullExprArg(Sema &actions) : E(0) { } 1852 1853 // FIXME: The const_cast here is ugly. RValue references would make this 1854 // much nicer (or we could duplicate a bunch of the move semantics 1855 // emulation code from Ownership.h). 1856 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1857 1858 ExprResult release() { 1859 return move(E); 1860 } 1861 1862 Expr *get() const { return E; } 1863 1864 Expr *operator->() { 1865 return E; 1866 } 1867 1868 private: 1869 // FIXME: No need to make the entire Sema class a friend when it's just 1870 // Sema::MakeFullExpr that needs access to the constructor below. 1871 friend class Sema; 1872 1873 explicit FullExprArg(Expr *expr) : E(expr) {} 1874 1875 Expr *E; 1876 }; 1877 1878 FullExprArg MakeFullExpr(Expr *Arg) { 1879 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1880 } 1881 1882 StmtResult ActOnExprStmt(FullExprArg Expr); 1883 1884 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1885 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1886 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1887 MultiStmtArg Elts, 1888 bool isStmtExpr); 1889 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1890 SourceLocation StartLoc, 1891 SourceLocation EndLoc); 1892 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1893 StmtResult ActOnForEachLValueExpr(Expr *E); 1894 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1895 SourceLocation DotDotDotLoc, Expr *RHSVal, 1896 SourceLocation ColonLoc); 1897 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1898 1899 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1900 SourceLocation ColonLoc, 1901 Stmt *SubStmt, Scope *CurScope); 1902 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1903 SourceLocation ColonLoc, Stmt *SubStmt); 1904 1905 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1906 FullExprArg CondVal, Decl *CondVar, 1907 Stmt *ThenVal, 1908 SourceLocation ElseLoc, Stmt *ElseVal); 1909 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1910 Expr *Cond, 1911 Decl *CondVar); 1912 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1913 Stmt *Switch, Stmt *Body); 1914 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1915 FullExprArg Cond, 1916 Decl *CondVar, Stmt *Body); 1917 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1918 SourceLocation WhileLoc, 1919 SourceLocation CondLParen, Expr *Cond, 1920 SourceLocation CondRParen); 1921 1922 StmtResult ActOnForStmt(SourceLocation ForLoc, 1923 SourceLocation LParenLoc, 1924 Stmt *First, FullExprArg Second, 1925 Decl *SecondVar, 1926 FullExprArg Third, 1927 SourceLocation RParenLoc, 1928 Stmt *Body); 1929 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1930 SourceLocation LParenLoc, 1931 Stmt *First, Expr *Second, 1932 SourceLocation RParenLoc, Stmt *Body); 1933 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 1934 SourceLocation LParenLoc, Stmt *LoopVar, 1935 SourceLocation ColonLoc, Expr *Collection, 1936 SourceLocation RParenLoc); 1937 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 1938 SourceLocation ColonLoc, 1939 Stmt *RangeDecl, Stmt *BeginEndDecl, 1940 Expr *Cond, Expr *Inc, 1941 Stmt *LoopVarDecl, 1942 SourceLocation RParenLoc); 1943 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 1944 1945 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1946 SourceLocation LabelLoc, 1947 LabelDecl *TheDecl); 1948 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1949 SourceLocation StarLoc, 1950 Expr *DestExp); 1951 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1952 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1953 1954 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1955 bool AllowFunctionParameters); 1956 1957 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1958 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1959 1960 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1961 bool IsSimple, bool IsVolatile, 1962 unsigned NumOutputs, unsigned NumInputs, 1963 IdentifierInfo **Names, 1964 MultiExprArg Constraints, 1965 MultiExprArg Exprs, 1966 Expr *AsmString, 1967 MultiExprArg Clobbers, 1968 SourceLocation RParenLoc, 1969 bool MSAsm = false); 1970 1971 1972 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1973 SourceLocation StartLoc, 1974 SourceLocation IdLoc, IdentifierInfo *Id, 1975 bool Invalid = false); 1976 1977 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1978 1979 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1980 Decl *Parm, Stmt *Body); 1981 1982 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1983 1984 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1985 MultiStmtArg Catch, Stmt *Finally); 1986 1987 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1988 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1989 Scope *CurScope); 1990 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1991 Expr *SynchExpr, 1992 Stmt *SynchBody); 1993 1994 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 1995 SourceLocation StartLoc, 1996 SourceLocation IdLoc, 1997 IdentifierInfo *Id); 1998 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1999 2000 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2001 Decl *ExDecl, Stmt *HandlerBlock); 2002 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2003 MultiStmtArg Handlers); 2004 2005 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2006 SourceLocation TryLoc, 2007 Stmt *TryBlock, 2008 Stmt *Handler); 2009 2010 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2011 Expr *FilterExpr, 2012 Stmt *Block); 2013 2014 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2015 Stmt *Block); 2016 2017 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2018 2019 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2020 2021 /// \brief If it's a file scoped decl that must warn if not used, keep track 2022 /// of it. 2023 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2024 2025 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2026 /// whose result is unused, warn. 2027 void DiagnoseUnusedExprResult(const Stmt *S); 2028 void DiagnoseUnusedDecl(const NamedDecl *ND); 2029 2030 ParsingDeclState PushParsingDeclaration() { 2031 return DelayedDiagnostics.pushParsingDecl(); 2032 } 2033 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2034 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2035 } 2036 2037 typedef ProcessingContextState ParsingClassState; 2038 ParsingClassState PushParsingClass() { 2039 return DelayedDiagnostics.pushContext(); 2040 } 2041 void PopParsingClass(ParsingClassState state) { 2042 DelayedDiagnostics.popContext(state); 2043 } 2044 2045 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2046 SourceLocation Loc, 2047 const ObjCInterfaceDecl *UnknownObjCClass=0); 2048 2049 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2050 2051 //===--------------------------------------------------------------------===// 2052 // Expression Parsing Callbacks: SemaExpr.cpp. 2053 2054 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2055 const ObjCInterfaceDecl *UnknownObjCClass=0); 2056 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2057 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2058 ObjCMethodDecl *Getter, 2059 SourceLocation Loc); 2060 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2061 Expr **Args, unsigned NumArgs); 2062 2063 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2064 2065 void PopExpressionEvaluationContext(); 2066 2067 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2068 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2069 void MarkDeclarationsReferencedInExpr(Expr *E); 2070 2071 /// \brief Conditionally issue a diagnostic based on the current 2072 /// evaluation context. 2073 /// 2074 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2075 /// the function body is parsed, and then do a basic reachability analysis to 2076 /// determine if the statement is reachable. If it is unreachable, the 2077 /// diagnostic will not be emitted. 2078 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2079 const PartialDiagnostic &PD); 2080 2081 // Primary Expressions. 2082 SourceRange getExprRange(Expr *E) const; 2083 2084 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2085 IdentifierInfo *II, 2086 SourceLocation NameLoc); 2087 2088 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2089 bool HasTrailingLParen, bool IsAddressOfOperand); 2090 2091 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2092 CorrectTypoContext CTC = CTC_Unknown); 2093 2094 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2095 bool AllowBuiltinCreation=false); 2096 2097 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2098 const DeclarationNameInfo &NameInfo, 2099 bool isAddressOfOperand, 2100 const TemplateArgumentListInfo *TemplateArgs); 2101 2102 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2103 ExprValueKind VK, 2104 SourceLocation Loc, 2105 const CXXScopeSpec *SS = 0); 2106 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2107 ExprValueKind VK, 2108 const DeclarationNameInfo &NameInfo, 2109 const CXXScopeSpec *SS = 0); 2110 ExprResult 2111 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2112 SourceLocation nameLoc, 2113 IndirectFieldDecl *indirectField, 2114 Expr *baseObjectExpr = 0, 2115 SourceLocation opLoc = SourceLocation()); 2116 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2117 LookupResult &R, 2118 const TemplateArgumentListInfo *TemplateArgs); 2119 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2120 LookupResult &R, 2121 const TemplateArgumentListInfo *TemplateArgs, 2122 bool IsDefiniteInstance); 2123 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2124 const LookupResult &R, 2125 bool HasTrailingLParen); 2126 2127 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2128 const DeclarationNameInfo &NameInfo); 2129 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2130 const DeclarationNameInfo &NameInfo, 2131 const TemplateArgumentListInfo *TemplateArgs); 2132 2133 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2134 LookupResult &R, 2135 bool ADL); 2136 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2137 const DeclarationNameInfo &NameInfo, 2138 NamedDecl *D); 2139 2140 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2141 ExprResult ActOnNumericConstant(const Token &); 2142 ExprResult ActOnCharacterConstant(const Token &); 2143 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2144 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2145 SourceLocation R, 2146 MultiExprArg Val, 2147 ParsedType TypeOfCast = ParsedType()); 2148 2149 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2150 /// fragments (e.g. "foo" "bar" L"baz"). 2151 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2152 2153 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2154 SourceLocation DefaultLoc, 2155 SourceLocation RParenLoc, 2156 Expr *ControllingExpr, 2157 MultiTypeArg Types, 2158 MultiExprArg Exprs); 2159 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2160 SourceLocation DefaultLoc, 2161 SourceLocation RParenLoc, 2162 Expr *ControllingExpr, 2163 TypeSourceInfo **Types, 2164 Expr **Exprs, 2165 unsigned NumAssocs); 2166 2167 // Binary/Unary Operators. 'Tok' is the token for the operator. 2168 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2169 Expr *InputArg); 2170 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2171 UnaryOperatorKind Opc, Expr *input); 2172 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2173 tok::TokenKind Op, Expr *Input); 2174 2175 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2176 SourceLocation OpLoc, 2177 UnaryExprOrTypeTrait ExprKind, 2178 SourceRange R); 2179 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2180 UnaryExprOrTypeTrait ExprKind, 2181 SourceRange R); 2182 ExprResult 2183 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2184 UnaryExprOrTypeTrait ExprKind, 2185 bool isType, void *TyOrEx, 2186 const SourceRange &ArgRange); 2187 2188 ExprResult CheckPlaceholderExpr(Expr *E); 2189 bool CheckVecStepExpr(Expr *E, SourceLocation OpLoc, SourceRange R); 2190 2191 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2192 SourceRange R, 2193 UnaryExprOrTypeTrait ExprKind); 2194 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2195 SourceLocation OpLoc, 2196 IdentifierInfo &Name, 2197 SourceLocation NameLoc, 2198 SourceLocation RParenLoc); 2199 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2200 tok::TokenKind Kind, Expr *Input); 2201 2202 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2203 Expr *Idx, SourceLocation RLoc); 2204 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2205 Expr *Idx, SourceLocation RLoc); 2206 2207 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2208 SourceLocation OpLoc, bool IsArrow, 2209 CXXScopeSpec &SS, 2210 NamedDecl *FirstQualifierInScope, 2211 const DeclarationNameInfo &NameInfo, 2212 const TemplateArgumentListInfo *TemplateArgs); 2213 2214 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2215 SourceLocation OpLoc, bool IsArrow, 2216 const CXXScopeSpec &SS, 2217 NamedDecl *FirstQualifierInScope, 2218 LookupResult &R, 2219 const TemplateArgumentListInfo *TemplateArgs, 2220 bool SuppressQualifierCheck = false); 2221 2222 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2223 bool &IsArrow, SourceLocation OpLoc, 2224 CXXScopeSpec &SS, 2225 Decl *ObjCImpDecl, 2226 bool HasTemplateArgs); 2227 2228 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2229 const CXXScopeSpec &SS, 2230 const LookupResult &R); 2231 2232 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2233 bool IsArrow, SourceLocation OpLoc, 2234 const CXXScopeSpec &SS, 2235 NamedDecl *FirstQualifierInScope, 2236 const DeclarationNameInfo &NameInfo, 2237 const TemplateArgumentListInfo *TemplateArgs); 2238 2239 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2240 SourceLocation OpLoc, 2241 tok::TokenKind OpKind, 2242 CXXScopeSpec &SS, 2243 UnqualifiedId &Member, 2244 Decl *ObjCImpDecl, 2245 bool HasTrailingLParen); 2246 2247 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2248 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2249 FunctionDecl *FDecl, 2250 const FunctionProtoType *Proto, 2251 Expr **Args, unsigned NumArgs, 2252 SourceLocation RParenLoc); 2253 2254 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2255 /// This provides the location of the left/right parens and a list of comma 2256 /// locations. 2257 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2258 MultiExprArg Args, SourceLocation RParenLoc, 2259 Expr *ExecConfig = 0); 2260 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2261 SourceLocation LParenLoc, 2262 Expr **Args, unsigned NumArgs, 2263 SourceLocation RParenLoc, 2264 Expr *ExecConfig = 0); 2265 2266 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2267 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2268 2269 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2270 ParsedType Ty, SourceLocation RParenLoc, 2271 Expr *Op); 2272 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2273 TypeSourceInfo *Ty, 2274 SourceLocation RParenLoc, 2275 Expr *Op); 2276 2277 bool TypeIsVectorType(ParsedType Ty) { 2278 return GetTypeFromParser(Ty)->isVectorType(); 2279 } 2280 2281 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2282 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2283 SourceLocation RParenLoc, Expr *E, 2284 TypeSourceInfo *TInfo); 2285 2286 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2287 ParsedType Ty, 2288 SourceLocation RParenLoc, 2289 Expr *Op); 2290 2291 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2292 TypeSourceInfo *TInfo, 2293 SourceLocation RParenLoc, 2294 Expr *InitExpr); 2295 2296 ExprResult ActOnInitList(SourceLocation LParenLoc, 2297 MultiExprArg InitList, 2298 SourceLocation RParenLoc); 2299 2300 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2301 SourceLocation Loc, 2302 bool GNUSyntax, 2303 ExprResult Init); 2304 2305 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2306 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2307 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2308 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2309 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2310 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2311 2312 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2313 /// in the case of a the GNU conditional expr extension. 2314 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2315 SourceLocation ColonLoc, 2316 Expr *Cond, Expr *LHS, Expr *RHS); 2317 2318 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2319 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2320 LabelDecl *LD); 2321 2322 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2323 SourceLocation RPLoc); // "({..})" 2324 2325 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2326 struct OffsetOfComponent { 2327 SourceLocation LocStart, LocEnd; 2328 bool isBrackets; // true if [expr], false if .ident 2329 union { 2330 IdentifierInfo *IdentInfo; 2331 ExprTy *E; 2332 } U; 2333 }; 2334 2335 /// __builtin_offsetof(type, a.b[123][456].c) 2336 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2337 TypeSourceInfo *TInfo, 2338 OffsetOfComponent *CompPtr, 2339 unsigned NumComponents, 2340 SourceLocation RParenLoc); 2341 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2342 SourceLocation BuiltinLoc, 2343 SourceLocation TypeLoc, 2344 ParsedType Arg1, 2345 OffsetOfComponent *CompPtr, 2346 unsigned NumComponents, 2347 SourceLocation RParenLoc); 2348 2349 // __builtin_choose_expr(constExpr, expr1, expr2) 2350 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2351 Expr *cond, Expr *expr1, 2352 Expr *expr2, SourceLocation RPLoc); 2353 2354 // __builtin_va_arg(expr, type) 2355 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2356 Expr *expr, ParsedType type, 2357 SourceLocation RPLoc); 2358 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2359 Expr *expr, TypeSourceInfo *TInfo, 2360 SourceLocation RPLoc); 2361 2362 // __null 2363 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2364 2365 bool CheckCaseExpression(Expr *expr); 2366 2367 //===------------------------- "Block" Extension ------------------------===// 2368 2369 /// ActOnBlockStart - This callback is invoked when a block literal is 2370 /// started. 2371 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2372 2373 /// ActOnBlockArguments - This callback allows processing of block arguments. 2374 /// If there are no arguments, this is still invoked. 2375 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2376 2377 /// ActOnBlockError - If there is an error parsing a block, this callback 2378 /// is invoked to pop the information about the block from the action impl. 2379 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2380 2381 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2382 /// literal was successfully completed. ^(int x){...} 2383 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2384 Stmt *Body, Scope *CurScope); 2385 2386 //===---------------------------- C++ Features --------------------------===// 2387 2388 // Act on C++ namespaces 2389 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2390 SourceLocation NamespaceLoc, 2391 SourceLocation IdentLoc, 2392 IdentifierInfo *Ident, 2393 SourceLocation LBrace, 2394 AttributeList *AttrList); 2395 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2396 2397 NamespaceDecl *getStdNamespace() const; 2398 NamespaceDecl *getOrCreateStdNamespace(); 2399 2400 CXXRecordDecl *getStdBadAlloc() const; 2401 2402 Decl *ActOnUsingDirective(Scope *CurScope, 2403 SourceLocation UsingLoc, 2404 SourceLocation NamespcLoc, 2405 CXXScopeSpec &SS, 2406 SourceLocation IdentLoc, 2407 IdentifierInfo *NamespcName, 2408 AttributeList *AttrList); 2409 2410 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2411 2412 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2413 SourceLocation NamespaceLoc, 2414 SourceLocation AliasLoc, 2415 IdentifierInfo *Alias, 2416 CXXScopeSpec &SS, 2417 SourceLocation IdentLoc, 2418 IdentifierInfo *Ident); 2419 2420 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2421 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2422 const LookupResult &PreviousDecls); 2423 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2424 NamedDecl *Target); 2425 2426 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2427 bool isTypeName, 2428 const CXXScopeSpec &SS, 2429 SourceLocation NameLoc, 2430 const LookupResult &Previous); 2431 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2432 const CXXScopeSpec &SS, 2433 SourceLocation NameLoc); 2434 2435 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2436 SourceLocation UsingLoc, 2437 CXXScopeSpec &SS, 2438 const DeclarationNameInfo &NameInfo, 2439 AttributeList *AttrList, 2440 bool IsInstantiation, 2441 bool IsTypeName, 2442 SourceLocation TypenameLoc); 2443 2444 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2445 2446 Decl *ActOnUsingDeclaration(Scope *CurScope, 2447 AccessSpecifier AS, 2448 bool HasUsingKeyword, 2449 SourceLocation UsingLoc, 2450 CXXScopeSpec &SS, 2451 UnqualifiedId &Name, 2452 AttributeList *AttrList, 2453 bool IsTypeName, 2454 SourceLocation TypenameLoc); 2455 Decl *ActOnAliasDeclaration(Scope *CurScope, 2456 AccessSpecifier AS, 2457 SourceLocation UsingLoc, 2458 UnqualifiedId &Name, 2459 TypeResult Type); 2460 2461 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2462 /// ActOnDeclarator, when a C++ direct initializer is present. 2463 /// e.g: "int x(1);" 2464 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2465 SourceLocation LParenLoc, 2466 MultiExprArg Exprs, 2467 SourceLocation RParenLoc, 2468 bool TypeMayContainAuto); 2469 2470 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2471 /// and sets it as the initializer for the the passed in VarDecl. 2472 bool InitializeVarWithConstructor(VarDecl *VD, 2473 CXXConstructorDecl *Constructor, 2474 MultiExprArg Exprs); 2475 2476 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2477 /// including handling of its default argument expressions. 2478 /// 2479 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2480 ExprResult 2481 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2482 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2483 bool RequiresZeroInit, unsigned ConstructKind, 2484 SourceRange ParenRange); 2485 2486 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2487 // the constructor can be elidable? 2488 ExprResult 2489 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2490 CXXConstructorDecl *Constructor, bool Elidable, 2491 MultiExprArg Exprs, bool RequiresZeroInit, 2492 unsigned ConstructKind, 2493 SourceRange ParenRange); 2494 2495 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2496 /// the default expr if needed. 2497 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2498 FunctionDecl *FD, 2499 ParmVarDecl *Param); 2500 2501 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2502 /// constructed variable. 2503 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2504 2505 /// \brief Declare the implicit default constructor for the given class. 2506 /// 2507 /// \param ClassDecl The class declaration into which the implicit 2508 /// default constructor will be added. 2509 /// 2510 /// \returns The implicitly-declared default constructor. 2511 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2512 CXXRecordDecl *ClassDecl); 2513 2514 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2515 /// defining this constructor as the default constructor. 2516 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2517 CXXConstructorDecl *Constructor); 2518 2519 /// \brief Declare the implicit destructor for the given class. 2520 /// 2521 /// \param ClassDecl The class declaration into which the implicit 2522 /// destructor will be added. 2523 /// 2524 /// \returns The implicitly-declared destructor. 2525 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2526 2527 /// DefineImplicitDestructor - Checks for feasibility of 2528 /// defining this destructor as the default destructor. 2529 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2530 CXXDestructorDecl *Destructor); 2531 2532 /// \brief Declare all inherited constructors for the given class. 2533 /// 2534 /// \param ClassDecl The class declaration into which the inherited 2535 /// constructors will be added. 2536 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2537 2538 /// \brief Declare the implicit copy constructor for the given class. 2539 /// 2540 /// \param S The scope of the class, which may be NULL if this is a 2541 /// template instantiation. 2542 /// 2543 /// \param ClassDecl The class declaration into which the implicit 2544 /// copy constructor will be added. 2545 /// 2546 /// \returns The implicitly-declared copy constructor. 2547 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2548 2549 /// DefineImplicitCopyConstructor - Checks for feasibility of 2550 /// defining this constructor as the copy constructor. 2551 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2552 CXXConstructorDecl *Constructor, 2553 unsigned TypeQuals); 2554 2555 /// \brief Declare the implicit copy assignment operator for the given class. 2556 /// 2557 /// \param S The scope of the class, which may be NULL if this is a 2558 /// template instantiation. 2559 /// 2560 /// \param ClassDecl The class declaration into which the implicit 2561 /// copy-assignment operator will be added. 2562 /// 2563 /// \returns The implicitly-declared copy assignment operator. 2564 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2565 2566 /// \brief Defined an implicitly-declared copy assignment operator. 2567 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2568 CXXMethodDecl *MethodDecl); 2569 2570 /// \brief Force the declaration of any implicitly-declared members of this 2571 /// class. 2572 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2573 2574 /// MaybeBindToTemporary - If the passed in expression has a record type with 2575 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2576 /// it simply returns the passed in expression. 2577 ExprResult MaybeBindToTemporary(Expr *E); 2578 2579 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2580 MultiExprArg ArgsPtr, 2581 SourceLocation Loc, 2582 ASTOwningVector<Expr*> &ConvertedArgs); 2583 2584 ParsedType getDestructorName(SourceLocation TildeLoc, 2585 IdentifierInfo &II, SourceLocation NameLoc, 2586 Scope *S, CXXScopeSpec &SS, 2587 ParsedType ObjectType, 2588 bool EnteringContext); 2589 2590 // Checks that reinterpret casts don't have undefined behavior. 2591 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2592 bool IsDereference, SourceRange Range); 2593 2594 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2595 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2596 tok::TokenKind Kind, 2597 SourceLocation LAngleBracketLoc, 2598 ParsedType Ty, 2599 SourceLocation RAngleBracketLoc, 2600 SourceLocation LParenLoc, 2601 Expr *E, 2602 SourceLocation RParenLoc); 2603 2604 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2605 tok::TokenKind Kind, 2606 TypeSourceInfo *Ty, 2607 Expr *E, 2608 SourceRange AngleBrackets, 2609 SourceRange Parens); 2610 2611 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2612 SourceLocation TypeidLoc, 2613 TypeSourceInfo *Operand, 2614 SourceLocation RParenLoc); 2615 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2616 SourceLocation TypeidLoc, 2617 Expr *Operand, 2618 SourceLocation RParenLoc); 2619 2620 /// ActOnCXXTypeid - Parse typeid( something ). 2621 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2622 SourceLocation LParenLoc, bool isType, 2623 void *TyOrExpr, 2624 SourceLocation RParenLoc); 2625 2626 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2627 SourceLocation TypeidLoc, 2628 TypeSourceInfo *Operand, 2629 SourceLocation RParenLoc); 2630 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2631 SourceLocation TypeidLoc, 2632 Expr *Operand, 2633 SourceLocation RParenLoc); 2634 2635 /// ActOnCXXUuidof - Parse __uuidof( something ). 2636 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2637 SourceLocation LParenLoc, bool isType, 2638 void *TyOrExpr, 2639 SourceLocation RParenLoc); 2640 2641 2642 //// ActOnCXXThis - Parse 'this' pointer. 2643 ExprResult ActOnCXXThis(SourceLocation loc); 2644 2645 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2646 /// pointer to an instance method whose 'this' pointer is 2647 /// capturable, or null if this is not possible. 2648 CXXMethodDecl *tryCaptureCXXThis(); 2649 2650 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2651 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2652 2653 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2654 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2655 2656 //// ActOnCXXThrow - Parse throw expressions. 2657 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2658 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2659 2660 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2661 /// Can be interpreted either as function-style casting ("int(x)") 2662 /// or class type construction ("ClassType(x,y,z)") 2663 /// or creation of a value-initialized type ("int()"). 2664 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2665 SourceLocation LParenLoc, 2666 MultiExprArg Exprs, 2667 SourceLocation RParenLoc); 2668 2669 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2670 SourceLocation LParenLoc, 2671 MultiExprArg Exprs, 2672 SourceLocation RParenLoc); 2673 2674 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2675 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2676 SourceLocation PlacementLParen, 2677 MultiExprArg PlacementArgs, 2678 SourceLocation PlacementRParen, 2679 SourceRange TypeIdParens, Declarator &D, 2680 SourceLocation ConstructorLParen, 2681 MultiExprArg ConstructorArgs, 2682 SourceLocation ConstructorRParen); 2683 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2684 SourceLocation PlacementLParen, 2685 MultiExprArg PlacementArgs, 2686 SourceLocation PlacementRParen, 2687 SourceRange TypeIdParens, 2688 QualType AllocType, 2689 TypeSourceInfo *AllocTypeInfo, 2690 Expr *ArraySize, 2691 SourceLocation ConstructorLParen, 2692 MultiExprArg ConstructorArgs, 2693 SourceLocation ConstructorRParen, 2694 bool TypeMayContainAuto = true); 2695 2696 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2697 SourceRange R); 2698 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2699 bool UseGlobal, QualType AllocType, bool IsArray, 2700 Expr **PlaceArgs, unsigned NumPlaceArgs, 2701 FunctionDecl *&OperatorNew, 2702 FunctionDecl *&OperatorDelete); 2703 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2704 DeclarationName Name, Expr** Args, 2705 unsigned NumArgs, DeclContext *Ctx, 2706 bool AllowMissing, FunctionDecl *&Operator); 2707 void DeclareGlobalNewDelete(); 2708 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2709 QualType Argument, 2710 bool addMallocAttr = false); 2711 2712 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2713 DeclarationName Name, FunctionDecl* &Operator); 2714 2715 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2716 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2717 bool UseGlobal, bool ArrayForm, 2718 Expr *Operand); 2719 2720 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2721 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2722 SourceLocation StmtLoc, 2723 bool ConvertToBoolean); 2724 2725 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2726 Expr *Operand, SourceLocation RParen); 2727 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2728 SourceLocation RParen); 2729 2730 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2731 /// pseudo-functions. 2732 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2733 SourceLocation KWLoc, 2734 ParsedType Ty, 2735 SourceLocation RParen); 2736 2737 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2738 SourceLocation KWLoc, 2739 TypeSourceInfo *T, 2740 SourceLocation RParen); 2741 2742 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2743 /// pseudo-functions. 2744 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2745 SourceLocation KWLoc, 2746 ParsedType LhsTy, 2747 ParsedType RhsTy, 2748 SourceLocation RParen); 2749 2750 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2751 SourceLocation KWLoc, 2752 TypeSourceInfo *LhsT, 2753 TypeSourceInfo *RhsT, 2754 SourceLocation RParen); 2755 2756 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 2757 /// pseudo-functions. 2758 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 2759 SourceLocation KWLoc, 2760 ParsedType LhsTy, 2761 Expr *DimExpr, 2762 SourceLocation RParen); 2763 2764 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 2765 SourceLocation KWLoc, 2766 TypeSourceInfo *TSInfo, 2767 Expr *DimExpr, 2768 SourceLocation RParen); 2769 2770 /// ActOnExpressionTrait - Parsed one of the unary type trait support 2771 /// pseudo-functions. 2772 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 2773 SourceLocation KWLoc, 2774 Expr *Queried, 2775 SourceLocation RParen); 2776 2777 ExprResult BuildExpressionTrait(ExpressionTrait OET, 2778 SourceLocation KWLoc, 2779 Expr *Queried, 2780 SourceLocation RParen); 2781 2782 ExprResult ActOnStartCXXMemberReference(Scope *S, 2783 Expr *Base, 2784 SourceLocation OpLoc, 2785 tok::TokenKind OpKind, 2786 ParsedType &ObjectType, 2787 bool &MayBePseudoDestructor); 2788 2789 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2790 2791 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2792 SourceLocation OpLoc, 2793 tok::TokenKind OpKind, 2794 const CXXScopeSpec &SS, 2795 TypeSourceInfo *ScopeType, 2796 SourceLocation CCLoc, 2797 SourceLocation TildeLoc, 2798 PseudoDestructorTypeStorage DestroyedType, 2799 bool HasTrailingLParen); 2800 2801 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2802 SourceLocation OpLoc, 2803 tok::TokenKind OpKind, 2804 CXXScopeSpec &SS, 2805 UnqualifiedId &FirstTypeName, 2806 SourceLocation CCLoc, 2807 SourceLocation TildeLoc, 2808 UnqualifiedId &SecondTypeName, 2809 bool HasTrailingLParen); 2810 2811 /// MaybeCreateExprWithCleanups - If the current full-expression 2812 /// requires any cleanups, surround it with a ExprWithCleanups node. 2813 /// Otherwise, just returns the passed-in expression. 2814 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2815 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2816 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2817 2818 ExprResult ActOnFinishFullExpr(Expr *Expr); 2819 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2820 2821 // Marks SS invalid if it represents an incomplete type. 2822 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2823 2824 DeclContext *computeDeclContext(QualType T); 2825 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2826 bool EnteringContext = false); 2827 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2828 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2829 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2830 2831 /// \brief The parser has parsed a global nested-name-specifier '::'. 2832 /// 2833 /// \param S The scope in which this nested-name-specifier occurs. 2834 /// 2835 /// \param CCLoc The location of the '::'. 2836 /// 2837 /// \param SS The nested-name-specifier, which will be updated in-place 2838 /// to reflect the parsed nested-name-specifier. 2839 /// 2840 /// \returns true if an error occurred, false otherwise. 2841 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2842 CXXScopeSpec &SS); 2843 2844 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2845 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2846 2847 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2848 SourceLocation IdLoc, 2849 IdentifierInfo &II, 2850 ParsedType ObjectType); 2851 2852 bool BuildCXXNestedNameSpecifier(Scope *S, 2853 IdentifierInfo &Identifier, 2854 SourceLocation IdentifierLoc, 2855 SourceLocation CCLoc, 2856 QualType ObjectType, 2857 bool EnteringContext, 2858 CXXScopeSpec &SS, 2859 NamedDecl *ScopeLookupResult, 2860 bool ErrorRecoveryLookup); 2861 2862 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2863 /// 2864 /// \param S The scope in which this nested-name-specifier occurs. 2865 /// 2866 /// \param Identifier The identifier preceding the '::'. 2867 /// 2868 /// \param IdentifierLoc The location of the identifier. 2869 /// 2870 /// \param CCLoc The location of the '::'. 2871 /// 2872 /// \param ObjectType The type of the object, if we're parsing 2873 /// nested-name-specifier in a member access expression. 2874 /// 2875 /// \param EnteringContext Whether we're entering the context nominated by 2876 /// this nested-name-specifier. 2877 /// 2878 /// \param SS The nested-name-specifier, which is both an input 2879 /// parameter (the nested-name-specifier before this type) and an 2880 /// output parameter (containing the full nested-name-specifier, 2881 /// including this new type). 2882 /// 2883 /// \returns true if an error occurred, false otherwise. 2884 bool ActOnCXXNestedNameSpecifier(Scope *S, 2885 IdentifierInfo &Identifier, 2886 SourceLocation IdentifierLoc, 2887 SourceLocation CCLoc, 2888 ParsedType ObjectType, 2889 bool EnteringContext, 2890 CXXScopeSpec &SS); 2891 2892 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2893 IdentifierInfo &Identifier, 2894 SourceLocation IdentifierLoc, 2895 SourceLocation ColonLoc, 2896 ParsedType ObjectType, 2897 bool EnteringContext); 2898 2899 /// \brief The parser has parsed a nested-name-specifier 2900 /// 'template[opt] template-name < template-args >::'. 2901 /// 2902 /// \param S The scope in which this nested-name-specifier occurs. 2903 /// 2904 /// \param TemplateLoc The location of the 'template' keyword, if any. 2905 /// 2906 /// \param SS The nested-name-specifier, which is both an input 2907 /// parameter (the nested-name-specifier before this type) and an 2908 /// output parameter (containing the full nested-name-specifier, 2909 /// including this new type). 2910 /// 2911 /// \param TemplateLoc the location of the 'template' keyword, if any. 2912 /// \param TemplateName The template name. 2913 /// \param TemplateNameLoc The location of the template name. 2914 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2915 /// \param TemplateArgs The template arguments. 2916 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2917 /// \param CCLoc The location of the '::'. 2918 2919 /// \param EnteringContext Whether we're entering the context of the 2920 /// nested-name-specifier. 2921 /// 2922 /// 2923 /// \returns true if an error occurred, false otherwise. 2924 bool ActOnCXXNestedNameSpecifier(Scope *S, 2925 SourceLocation TemplateLoc, 2926 CXXScopeSpec &SS, 2927 TemplateTy Template, 2928 SourceLocation TemplateNameLoc, 2929 SourceLocation LAngleLoc, 2930 ASTTemplateArgsPtr TemplateArgs, 2931 SourceLocation RAngleLoc, 2932 SourceLocation CCLoc, 2933 bool EnteringContext); 2934 2935 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2936 /// that the parser can use later to reconstruct the given 2937 /// nested-name-specifier. 2938 /// 2939 /// \param SS A nested-name-specifier. 2940 /// 2941 /// \returns A pointer containing all of the information in the 2942 /// nested-name-specifier \p SS. 2943 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2944 2945 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2946 /// the nested-name-specifier structure. 2947 /// 2948 /// \param Annotation The annotation pointer, produced by 2949 /// \c SaveNestedNameSpecifierAnnotation(). 2950 /// 2951 /// \param AnnotationRange The source range corresponding to the annotation. 2952 /// 2953 /// \param SS The nested-name-specifier that will be updated with the contents 2954 /// of the annotation pointer. 2955 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2956 SourceRange AnnotationRange, 2957 CXXScopeSpec &SS); 2958 2959 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2960 2961 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2962 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2963 /// After this method is called, according to [C++ 3.4.3p3], names should be 2964 /// looked up in the declarator-id's scope, until the declarator is parsed and 2965 /// ActOnCXXExitDeclaratorScope is called. 2966 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2967 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2968 2969 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2970 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2971 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2972 /// Used to indicate that names should revert to being looked up in the 2973 /// defining scope. 2974 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2975 2976 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2977 /// initializer for the declaration 'Dcl'. 2978 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2979 /// static data member of class X, names should be looked up in the scope of 2980 /// class X. 2981 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2982 2983 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2984 /// initializer for the declaration 'Dcl'. 2985 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2986 2987 // ParseObjCStringLiteral - Parse Objective-C string literals. 2988 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2989 Expr **Strings, 2990 unsigned NumStrings); 2991 2992 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2993 TypeSourceInfo *EncodedTypeInfo, 2994 SourceLocation RParenLoc); 2995 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2996 CXXMethodDecl *Method); 2997 2998 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2999 SourceLocation EncodeLoc, 3000 SourceLocation LParenLoc, 3001 ParsedType Ty, 3002 SourceLocation RParenLoc); 3003 3004 // ParseObjCSelectorExpression - Build selector expression for @selector 3005 ExprResult ParseObjCSelectorExpression(Selector Sel, 3006 SourceLocation AtLoc, 3007 SourceLocation SelLoc, 3008 SourceLocation LParenLoc, 3009 SourceLocation RParenLoc); 3010 3011 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3012 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3013 SourceLocation AtLoc, 3014 SourceLocation ProtoLoc, 3015 SourceLocation LParenLoc, 3016 SourceLocation RParenLoc); 3017 3018 //===--------------------------------------------------------------------===// 3019 // C++ Declarations 3020 // 3021 Decl *ActOnStartLinkageSpecification(Scope *S, 3022 SourceLocation ExternLoc, 3023 SourceLocation LangLoc, 3024 llvm::StringRef Lang, 3025 SourceLocation LBraceLoc); 3026 Decl *ActOnFinishLinkageSpecification(Scope *S, 3027 Decl *LinkageSpec, 3028 SourceLocation RBraceLoc); 3029 3030 3031 //===--------------------------------------------------------------------===// 3032 // C++ Classes 3033 // 3034 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3035 const CXXScopeSpec *SS = 0); 3036 3037 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3038 SourceLocation ASLoc, 3039 SourceLocation ColonLoc); 3040 3041 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3042 Declarator &D, 3043 MultiTemplateParamsArg TemplateParameterLists, 3044 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3045 Expr *Init, bool IsDefinition, 3046 bool Deleted = false); 3047 3048 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3049 Scope *S, 3050 CXXScopeSpec &SS, 3051 IdentifierInfo *MemberOrBase, 3052 ParsedType TemplateTypeTy, 3053 SourceLocation IdLoc, 3054 SourceLocation LParenLoc, 3055 Expr **Args, unsigned NumArgs, 3056 SourceLocation RParenLoc, 3057 SourceLocation EllipsisLoc); 3058 3059 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3060 unsigned NumArgs, SourceLocation IdLoc, 3061 SourceLocation LParenLoc, 3062 SourceLocation RParenLoc); 3063 3064 MemInitResult BuildBaseInitializer(QualType BaseType, 3065 TypeSourceInfo *BaseTInfo, 3066 Expr **Args, unsigned NumArgs, 3067 SourceLocation LParenLoc, 3068 SourceLocation RParenLoc, 3069 CXXRecordDecl *ClassDecl, 3070 SourceLocation EllipsisLoc); 3071 3072 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3073 Expr **Args, unsigned NumArgs, 3074 SourceLocation BaseLoc, 3075 SourceLocation RParenLoc, 3076 SourceLocation LParenLoc, 3077 CXXRecordDecl *ClassDecl); 3078 3079 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3080 CXXCtorInitializer *Initializer); 3081 3082 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3083 CXXCtorInitializer **Initializers, 3084 unsigned NumInitializers, bool AnyErrors); 3085 3086 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3087 3088 3089 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3090 /// mark all the non-trivial destructors of its members and bases as 3091 /// referenced. 3092 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3093 CXXRecordDecl *Record); 3094 3095 /// \brief The list of classes whose vtables have been used within 3096 /// this translation unit, and the source locations at which the 3097 /// first use occurred. 3098 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3099 3100 /// \brief The list of vtables that are required but have not yet been 3101 /// materialized. 3102 llvm::SmallVector<VTableUse, 16> VTableUses; 3103 3104 /// \brief The set of classes whose vtables have been used within 3105 /// this translation unit, and a bit that will be true if the vtable is 3106 /// required to be emitted (otherwise, it should be emitted only if needed 3107 /// by code generation). 3108 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3109 3110 /// \brief A list of all of the dynamic classes in this translation 3111 /// unit. 3112 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3113 3114 /// \brief Note that the vtable for the given class was used at the 3115 /// given location. 3116 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3117 bool DefinitionRequired = false); 3118 3119 /// MarkVirtualMembersReferenced - Will mark all members of the given 3120 /// CXXRecordDecl referenced. 3121 void MarkVirtualMembersReferenced(SourceLocation Loc, 3122 const CXXRecordDecl *RD); 3123 3124 /// \brief Define all of the vtables that have been used in this 3125 /// translation unit and reference any virtual members used by those 3126 /// vtables. 3127 /// 3128 /// \returns true if any work was done, false otherwise. 3129 bool DefineUsedVTables(); 3130 3131 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3132 3133 void ActOnMemInitializers(Decl *ConstructorDecl, 3134 SourceLocation ColonLoc, 3135 MemInitTy **MemInits, unsigned NumMemInits, 3136 bool AnyErrors); 3137 3138 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3139 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3140 Decl *TagDecl, 3141 SourceLocation LBrac, 3142 SourceLocation RBrac, 3143 AttributeList *AttrList); 3144 3145 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3146 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3147 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3148 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3149 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3150 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3151 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3152 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3153 bool IsInsideALocalClassWithinATemplateFunction(); 3154 3155 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3156 Expr *AssertExpr, 3157 Expr *AssertMessageExpr, 3158 SourceLocation RParenLoc); 3159 3160 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3161 TypeSourceInfo *TSInfo); 3162 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3163 MultiTemplateParamsArg TemplateParams); 3164 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3165 MultiTemplateParamsArg TemplateParams); 3166 3167 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3168 StorageClass& SC); 3169 void CheckConstructor(CXXConstructorDecl *Constructor); 3170 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3171 StorageClass& SC); 3172 bool CheckDestructor(CXXDestructorDecl *Destructor); 3173 void CheckConversionDeclarator(Declarator &D, QualType &R, 3174 StorageClass& SC); 3175 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3176 3177 //===--------------------------------------------------------------------===// 3178 // C++ Derived Classes 3179 // 3180 3181 /// ActOnBaseSpecifier - Parsed a base specifier 3182 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3183 SourceRange SpecifierRange, 3184 bool Virtual, AccessSpecifier Access, 3185 TypeSourceInfo *TInfo, 3186 SourceLocation EllipsisLoc); 3187 3188 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3189 SourceRange SpecifierRange, 3190 bool Virtual, AccessSpecifier Access, 3191 ParsedType basetype, 3192 SourceLocation BaseLoc, 3193 SourceLocation EllipsisLoc); 3194 3195 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3196 unsigned NumBases); 3197 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3198 3199 bool IsDerivedFrom(QualType Derived, QualType Base); 3200 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3201 3202 // FIXME: I don't like this name. 3203 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3204 3205 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3206 3207 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3208 SourceLocation Loc, SourceRange Range, 3209 CXXCastPath *BasePath = 0, 3210 bool IgnoreAccess = false); 3211 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3212 unsigned InaccessibleBaseID, 3213 unsigned AmbigiousBaseConvID, 3214 SourceLocation Loc, SourceRange Range, 3215 DeclarationName Name, 3216 CXXCastPath *BasePath); 3217 3218 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3219 3220 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3221 /// covariant, according to C++ [class.virtual]p5. 3222 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3223 const CXXMethodDecl *Old); 3224 3225 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3226 /// spec is a subset of base spec. 3227 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3228 const CXXMethodDecl *Old); 3229 3230 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3231 3232 /// CheckOverrideControl - Check C++0x override control semantics. 3233 void CheckOverrideControl(const Decl *D); 3234 3235 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3236 /// overrides a virtual member function marked 'final', according to 3237 /// C++0x [class.virtual]p3. 3238 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3239 const CXXMethodDecl *Old); 3240 3241 3242 //===--------------------------------------------------------------------===// 3243 // C++ Access Control 3244 // 3245 3246 enum AccessResult { 3247 AR_accessible, 3248 AR_inaccessible, 3249 AR_dependent, 3250 AR_delayed 3251 }; 3252 3253 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3254 NamedDecl *PrevMemberDecl, 3255 AccessSpecifier LexicalAS); 3256 3257 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3258 DeclAccessPair FoundDecl); 3259 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3260 DeclAccessPair FoundDecl); 3261 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3262 SourceRange PlacementRange, 3263 CXXRecordDecl *NamingClass, 3264 DeclAccessPair FoundDecl); 3265 AccessResult CheckConstructorAccess(SourceLocation Loc, 3266 CXXConstructorDecl *D, 3267 const InitializedEntity &Entity, 3268 AccessSpecifier Access, 3269 bool IsCopyBindingRefToTemp = false); 3270 AccessResult CheckDestructorAccess(SourceLocation Loc, 3271 CXXDestructorDecl *Dtor, 3272 const PartialDiagnostic &PDiag); 3273 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3274 NamedDecl *D, 3275 const PartialDiagnostic &PDiag); 3276 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3277 Expr *ObjectExpr, 3278 Expr *ArgExpr, 3279 DeclAccessPair FoundDecl); 3280 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3281 DeclAccessPair FoundDecl); 3282 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3283 QualType Base, QualType Derived, 3284 const CXXBasePath &Path, 3285 unsigned DiagID, 3286 bool ForceCheck = false, 3287 bool ForceUnprivileged = false); 3288 void CheckLookupAccess(const LookupResult &R); 3289 3290 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3291 const MultiLevelTemplateArgumentList &TemplateArgs); 3292 void PerformDependentDiagnostics(const DeclContext *Pattern, 3293 const MultiLevelTemplateArgumentList &TemplateArgs); 3294 3295 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3296 3297 /// A flag to suppress access checking. 3298 bool SuppressAccessChecking; 3299 3300 /// \brief When true, access checking violations are treated as SFINAE 3301 /// failures rather than hard errors. 3302 bool AccessCheckingSFINAE; 3303 3304 void ActOnStartSuppressingAccessChecks(); 3305 void ActOnStopSuppressingAccessChecks(); 3306 3307 enum AbstractDiagSelID { 3308 AbstractNone = -1, 3309 AbstractReturnType, 3310 AbstractParamType, 3311 AbstractVariableType, 3312 AbstractFieldType, 3313 AbstractArrayType 3314 }; 3315 3316 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3317 const PartialDiagnostic &PD); 3318 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3319 3320 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3321 AbstractDiagSelID SelID = AbstractNone); 3322 3323 //===--------------------------------------------------------------------===// 3324 // C++ Overloaded Operators [C++ 13.5] 3325 // 3326 3327 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3328 3329 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3330 3331 //===--------------------------------------------------------------------===// 3332 // C++ Templates [C++ 14] 3333 // 3334 void FilterAcceptableTemplateNames(LookupResult &R); 3335 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3336 3337 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3338 QualType ObjectType, bool EnteringContext, 3339 bool &MemberOfUnknownSpecialization); 3340 3341 TemplateNameKind isTemplateName(Scope *S, 3342 CXXScopeSpec &SS, 3343 bool hasTemplateKeyword, 3344 UnqualifiedId &Name, 3345 ParsedType ObjectType, 3346 bool EnteringContext, 3347 TemplateTy &Template, 3348 bool &MemberOfUnknownSpecialization); 3349 3350 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3351 SourceLocation IILoc, 3352 Scope *S, 3353 const CXXScopeSpec *SS, 3354 TemplateTy &SuggestedTemplate, 3355 TemplateNameKind &SuggestedKind); 3356 3357 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3358 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3359 3360 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3361 SourceLocation EllipsisLoc, 3362 SourceLocation KeyLoc, 3363 IdentifierInfo *ParamName, 3364 SourceLocation ParamNameLoc, 3365 unsigned Depth, unsigned Position, 3366 SourceLocation EqualLoc, 3367 ParsedType DefaultArg); 3368 3369 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3370 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3371 unsigned Depth, 3372 unsigned Position, 3373 SourceLocation EqualLoc, 3374 Expr *DefaultArg); 3375 Decl *ActOnTemplateTemplateParameter(Scope *S, 3376 SourceLocation TmpLoc, 3377 TemplateParamsTy *Params, 3378 SourceLocation EllipsisLoc, 3379 IdentifierInfo *ParamName, 3380 SourceLocation ParamNameLoc, 3381 unsigned Depth, 3382 unsigned Position, 3383 SourceLocation EqualLoc, 3384 ParsedTemplateArgument DefaultArg); 3385 3386 TemplateParamsTy * 3387 ActOnTemplateParameterList(unsigned Depth, 3388 SourceLocation ExportLoc, 3389 SourceLocation TemplateLoc, 3390 SourceLocation LAngleLoc, 3391 Decl **Params, unsigned NumParams, 3392 SourceLocation RAngleLoc); 3393 3394 /// \brief The context in which we are checking a template parameter 3395 /// list. 3396 enum TemplateParamListContext { 3397 TPC_ClassTemplate, 3398 TPC_FunctionTemplate, 3399 TPC_ClassTemplateMember, 3400 TPC_FriendFunctionTemplate, 3401 TPC_FriendFunctionTemplateDefinition 3402 }; 3403 3404 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3405 TemplateParameterList *OldParams, 3406 TemplateParamListContext TPC); 3407 TemplateParameterList * 3408 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3409 const CXXScopeSpec &SS, 3410 TemplateParameterList **ParamLists, 3411 unsigned NumParamLists, 3412 bool IsFriend, 3413 bool &IsExplicitSpecialization, 3414 bool &Invalid); 3415 3416 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3417 SourceLocation KWLoc, CXXScopeSpec &SS, 3418 IdentifierInfo *Name, SourceLocation NameLoc, 3419 AttributeList *Attr, 3420 TemplateParameterList *TemplateParams, 3421 AccessSpecifier AS, 3422 unsigned NumOuterTemplateParamLists, 3423 TemplateParameterList **OuterTemplateParamLists); 3424 3425 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3426 TemplateArgumentListInfo &Out); 3427 3428 void NoteAllFoundTemplates(TemplateName Name); 3429 3430 QualType CheckTemplateIdType(TemplateName Template, 3431 SourceLocation TemplateLoc, 3432 TemplateArgumentListInfo &TemplateArgs); 3433 3434 TypeResult 3435 ActOnTemplateIdType(CXXScopeSpec &SS, 3436 TemplateTy Template, SourceLocation TemplateLoc, 3437 SourceLocation LAngleLoc, 3438 ASTTemplateArgsPtr TemplateArgs, 3439 SourceLocation RAngleLoc); 3440 3441 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3442 /// such as \c class T::template apply<U>. 3443 /// 3444 /// \param TUK 3445 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3446 TypeSpecifierType TagSpec, 3447 SourceLocation TagLoc, 3448 CXXScopeSpec &SS, 3449 TemplateTy TemplateD, 3450 SourceLocation TemplateLoc, 3451 SourceLocation LAngleLoc, 3452 ASTTemplateArgsPtr TemplateArgsIn, 3453 SourceLocation RAngleLoc); 3454 3455 3456 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3457 LookupResult &R, 3458 bool RequiresADL, 3459 const TemplateArgumentListInfo &TemplateArgs); 3460 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3461 const DeclarationNameInfo &NameInfo, 3462 const TemplateArgumentListInfo &TemplateArgs); 3463 3464 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3465 SourceLocation TemplateKWLoc, 3466 CXXScopeSpec &SS, 3467 UnqualifiedId &Name, 3468 ParsedType ObjectType, 3469 bool EnteringContext, 3470 TemplateTy &Template); 3471 3472 DeclResult 3473 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3474 SourceLocation KWLoc, 3475 CXXScopeSpec &SS, 3476 TemplateTy Template, 3477 SourceLocation TemplateNameLoc, 3478 SourceLocation LAngleLoc, 3479 ASTTemplateArgsPtr TemplateArgs, 3480 SourceLocation RAngleLoc, 3481 AttributeList *Attr, 3482 MultiTemplateParamsArg TemplateParameterLists); 3483 3484 Decl *ActOnTemplateDeclarator(Scope *S, 3485 MultiTemplateParamsArg TemplateParameterLists, 3486 Declarator &D); 3487 3488 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3489 MultiTemplateParamsArg TemplateParameterLists, 3490 Declarator &D); 3491 3492 bool 3493 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3494 TemplateSpecializationKind NewTSK, 3495 NamedDecl *PrevDecl, 3496 TemplateSpecializationKind PrevTSK, 3497 SourceLocation PrevPtOfInstantiation, 3498 bool &SuppressNew); 3499 3500 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3501 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3502 LookupResult &Previous); 3503 3504 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3505 TemplateArgumentListInfo *ExplicitTemplateArgs, 3506 LookupResult &Previous); 3507 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3508 3509 DeclResult 3510 ActOnExplicitInstantiation(Scope *S, 3511 SourceLocation ExternLoc, 3512 SourceLocation TemplateLoc, 3513 unsigned TagSpec, 3514 SourceLocation KWLoc, 3515 const CXXScopeSpec &SS, 3516 TemplateTy Template, 3517 SourceLocation TemplateNameLoc, 3518 SourceLocation LAngleLoc, 3519 ASTTemplateArgsPtr TemplateArgs, 3520 SourceLocation RAngleLoc, 3521 AttributeList *Attr); 3522 3523 DeclResult 3524 ActOnExplicitInstantiation(Scope *S, 3525 SourceLocation ExternLoc, 3526 SourceLocation TemplateLoc, 3527 unsigned TagSpec, 3528 SourceLocation KWLoc, 3529 CXXScopeSpec &SS, 3530 IdentifierInfo *Name, 3531 SourceLocation NameLoc, 3532 AttributeList *Attr); 3533 3534 DeclResult ActOnExplicitInstantiation(Scope *S, 3535 SourceLocation ExternLoc, 3536 SourceLocation TemplateLoc, 3537 Declarator &D); 3538 3539 TemplateArgumentLoc 3540 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3541 SourceLocation TemplateLoc, 3542 SourceLocation RAngleLoc, 3543 Decl *Param, 3544 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3545 3546 /// \brief Specifies the context in which a particular template 3547 /// argument is being checked. 3548 enum CheckTemplateArgumentKind { 3549 /// \brief The template argument was specified in the code or was 3550 /// instantiated with some deduced template arguments. 3551 CTAK_Specified, 3552 3553 /// \brief The template argument was deduced via template argument 3554 /// deduction. 3555 CTAK_Deduced, 3556 3557 /// \brief The template argument was deduced from an array bound 3558 /// via template argument deduction. 3559 CTAK_DeducedFromArrayBound 3560 }; 3561 3562 bool CheckTemplateArgument(NamedDecl *Param, 3563 const TemplateArgumentLoc &Arg, 3564 NamedDecl *Template, 3565 SourceLocation TemplateLoc, 3566 SourceLocation RAngleLoc, 3567 unsigned ArgumentPackIndex, 3568 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3569 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3570 3571 /// \brief Check that the given template arguments can be be provided to 3572 /// the given template, converting the arguments along the way. 3573 /// 3574 /// \param Template The template to which the template arguments are being 3575 /// provided. 3576 /// 3577 /// \param TemplateLoc The location of the template name in the source. 3578 /// 3579 /// \param TemplateArgs The list of template arguments. If the template is 3580 /// a template template parameter, this function may extend the set of 3581 /// template arguments to also include substituted, defaulted template 3582 /// arguments. 3583 /// 3584 /// \param PartialTemplateArgs True if the list of template arguments is 3585 /// intentionally partial, e.g., because we're checking just the initial 3586 /// set of template arguments. 3587 /// 3588 /// \param Converted Will receive the converted, canonicalized template 3589 /// arguments. 3590 /// 3591 /// \returns True if an error occurred, false otherwise. 3592 bool CheckTemplateArgumentList(TemplateDecl *Template, 3593 SourceLocation TemplateLoc, 3594 TemplateArgumentListInfo &TemplateArgs, 3595 bool PartialTemplateArgs, 3596 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3597 3598 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3599 const TemplateArgumentLoc &Arg, 3600 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3601 3602 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3603 TypeSourceInfo *Arg); 3604 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3605 TemplateArgument &Converted); 3606 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3607 QualType InstantiatedParamType, Expr *Arg, 3608 TemplateArgument &Converted, 3609 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3610 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3611 const TemplateArgumentLoc &Arg); 3612 3613 ExprResult 3614 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3615 QualType ParamType, 3616 SourceLocation Loc); 3617 ExprResult 3618 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3619 SourceLocation Loc); 3620 3621 /// \brief Enumeration describing how template parameter lists are compared 3622 /// for equality. 3623 enum TemplateParameterListEqualKind { 3624 /// \brief We are matching the template parameter lists of two templates 3625 /// that might be redeclarations. 3626 /// 3627 /// \code 3628 /// template<typename T> struct X; 3629 /// template<typename T> struct X; 3630 /// \endcode 3631 TPL_TemplateMatch, 3632 3633 /// \brief We are matching the template parameter lists of two template 3634 /// template parameters as part of matching the template parameter lists 3635 /// of two templates that might be redeclarations. 3636 /// 3637 /// \code 3638 /// template<template<int I> class TT> struct X; 3639 /// template<template<int Value> class Other> struct X; 3640 /// \endcode 3641 TPL_TemplateTemplateParmMatch, 3642 3643 /// \brief We are matching the template parameter lists of a template 3644 /// template argument against the template parameter lists of a template 3645 /// template parameter. 3646 /// 3647 /// \code 3648 /// template<template<int Value> class Metafun> struct X; 3649 /// template<int Value> struct integer_c; 3650 /// X<integer_c> xic; 3651 /// \endcode 3652 TPL_TemplateTemplateArgumentMatch 3653 }; 3654 3655 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3656 TemplateParameterList *Old, 3657 bool Complain, 3658 TemplateParameterListEqualKind Kind, 3659 SourceLocation TemplateArgLoc 3660 = SourceLocation()); 3661 3662 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3663 3664 /// \brief Called when the parser has parsed a C++ typename 3665 /// specifier, e.g., "typename T::type". 3666 /// 3667 /// \param S The scope in which this typename type occurs. 3668 /// \param TypenameLoc the location of the 'typename' keyword 3669 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3670 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3671 /// \param IdLoc the location of the identifier. 3672 TypeResult 3673 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3674 const CXXScopeSpec &SS, const IdentifierInfo &II, 3675 SourceLocation IdLoc); 3676 3677 /// \brief Called when the parser has parsed a C++ typename 3678 /// specifier that ends in a template-id, e.g., 3679 /// "typename MetaFun::template apply<T1, T2>". 3680 /// 3681 /// \param S The scope in which this typename type occurs. 3682 /// \param TypenameLoc the location of the 'typename' keyword 3683 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3684 /// \param TemplateLoc the location of the 'template' keyword, if any. 3685 /// \param TemplateName The template name. 3686 /// \param TemplateNameLoc The location of the template name. 3687 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3688 /// \param TemplateArgs The template arguments. 3689 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3690 TypeResult 3691 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3692 const CXXScopeSpec &SS, 3693 SourceLocation TemplateLoc, 3694 TemplateTy Template, 3695 SourceLocation TemplateNameLoc, 3696 SourceLocation LAngleLoc, 3697 ASTTemplateArgsPtr TemplateArgs, 3698 SourceLocation RAngleLoc); 3699 3700 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3701 SourceLocation KeywordLoc, 3702 NestedNameSpecifierLoc QualifierLoc, 3703 const IdentifierInfo &II, 3704 SourceLocation IILoc); 3705 3706 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3707 SourceLocation Loc, 3708 DeclarationName Name); 3709 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3710 3711 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3712 3713 std::string 3714 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3715 const TemplateArgumentList &Args); 3716 3717 std::string 3718 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3719 const TemplateArgument *Args, 3720 unsigned NumArgs); 3721 3722 //===--------------------------------------------------------------------===// 3723 // C++ Variadic Templates (C++0x [temp.variadic]) 3724 //===--------------------------------------------------------------------===// 3725 3726 /// \brief The context in which an unexpanded parameter pack is 3727 /// being diagnosed. 3728 /// 3729 /// Note that the values of this enumeration line up with the first 3730 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3731 enum UnexpandedParameterPackContext { 3732 /// \brief An arbitrary expression. 3733 UPPC_Expression = 0, 3734 3735 /// \brief The base type of a class type. 3736 UPPC_BaseType, 3737 3738 /// \brief The type of an arbitrary declaration. 3739 UPPC_DeclarationType, 3740 3741 /// \brief The type of a data member. 3742 UPPC_DataMemberType, 3743 3744 /// \brief The size of a bit-field. 3745 UPPC_BitFieldWidth, 3746 3747 /// \brief The expression in a static assertion. 3748 UPPC_StaticAssertExpression, 3749 3750 /// \brief The fixed underlying type of an enumeration. 3751 UPPC_FixedUnderlyingType, 3752 3753 /// \brief The enumerator value. 3754 UPPC_EnumeratorValue, 3755 3756 /// \brief A using declaration. 3757 UPPC_UsingDeclaration, 3758 3759 /// \brief A friend declaration. 3760 UPPC_FriendDeclaration, 3761 3762 /// \brief A declaration qualifier. 3763 UPPC_DeclarationQualifier, 3764 3765 /// \brief An initializer. 3766 UPPC_Initializer, 3767 3768 /// \brief A default argument. 3769 UPPC_DefaultArgument, 3770 3771 /// \brief The type of a non-type template parameter. 3772 UPPC_NonTypeTemplateParameterType, 3773 3774 /// \brief The type of an exception. 3775 UPPC_ExceptionType, 3776 3777 /// \brief Partial specialization. 3778 UPPC_PartialSpecialization 3779 }; 3780 3781 /// \brief If the given type contains an unexpanded parameter pack, 3782 /// diagnose the error. 3783 /// 3784 /// \param Loc The source location where a diagnostc should be emitted. 3785 /// 3786 /// \param T The type that is being checked for unexpanded parameter 3787 /// packs. 3788 /// 3789 /// \returns true if an error occurred, false otherwise. 3790 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3791 UnexpandedParameterPackContext UPPC); 3792 3793 /// \brief If the given expression contains an unexpanded parameter 3794 /// pack, diagnose the error. 3795 /// 3796 /// \param E The expression that is being checked for unexpanded 3797 /// parameter packs. 3798 /// 3799 /// \returns true if an error occurred, false otherwise. 3800 bool DiagnoseUnexpandedParameterPack(Expr *E, 3801 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3802 3803 /// \brief If the given nested-name-specifier contains an unexpanded 3804 /// parameter pack, diagnose the error. 3805 /// 3806 /// \param SS The nested-name-specifier that is being checked for 3807 /// unexpanded parameter packs. 3808 /// 3809 /// \returns true if an error occurred, false otherwise. 3810 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3811 UnexpandedParameterPackContext UPPC); 3812 3813 /// \brief If the given name contains an unexpanded parameter pack, 3814 /// diagnose the error. 3815 /// 3816 /// \param NameInfo The name (with source location information) that 3817 /// is being checked for unexpanded parameter packs. 3818 /// 3819 /// \returns true if an error occurred, false otherwise. 3820 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3821 UnexpandedParameterPackContext UPPC); 3822 3823 /// \brief If the given template name contains an unexpanded parameter pack, 3824 /// diagnose the error. 3825 /// 3826 /// \param Loc The location of the template name. 3827 /// 3828 /// \param Template The template name that is being checked for unexpanded 3829 /// parameter packs. 3830 /// 3831 /// \returns true if an error occurred, false otherwise. 3832 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3833 TemplateName Template, 3834 UnexpandedParameterPackContext UPPC); 3835 3836 /// \brief If the given template argument contains an unexpanded parameter 3837 /// pack, diagnose the error. 3838 /// 3839 /// \param Arg The template argument that is being checked for unexpanded 3840 /// parameter packs. 3841 /// 3842 /// \returns true if an error occurred, false otherwise. 3843 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3844 UnexpandedParameterPackContext UPPC); 3845 3846 /// \brief Collect the set of unexpanded parameter packs within the given 3847 /// template argument. 3848 /// 3849 /// \param Arg The template argument that will be traversed to find 3850 /// unexpanded parameter packs. 3851 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3852 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3853 3854 /// \brief Collect the set of unexpanded parameter packs within the given 3855 /// template argument. 3856 /// 3857 /// \param Arg The template argument that will be traversed to find 3858 /// unexpanded parameter packs. 3859 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3860 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3861 3862 /// \brief Collect the set of unexpanded parameter packs within the given 3863 /// type. 3864 /// 3865 /// \param T The type that will be traversed to find 3866 /// unexpanded parameter packs. 3867 void collectUnexpandedParameterPacks(QualType T, 3868 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3869 3870 /// \brief Collect the set of unexpanded parameter packs within the given 3871 /// type. 3872 /// 3873 /// \param TL The type that will be traversed to find 3874 /// unexpanded parameter packs. 3875 void collectUnexpandedParameterPacks(TypeLoc TL, 3876 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3877 3878 /// \brief Invoked when parsing a template argument followed by an 3879 /// ellipsis, which creates a pack expansion. 3880 /// 3881 /// \param Arg The template argument preceding the ellipsis, which 3882 /// may already be invalid. 3883 /// 3884 /// \param EllipsisLoc The location of the ellipsis. 3885 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3886 SourceLocation EllipsisLoc); 3887 3888 /// \brief Invoked when parsing a type followed by an ellipsis, which 3889 /// creates a pack expansion. 3890 /// 3891 /// \param Type The type preceding the ellipsis, which will become 3892 /// the pattern of the pack expansion. 3893 /// 3894 /// \param EllipsisLoc The location of the ellipsis. 3895 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3896 3897 /// \brief Construct a pack expansion type from the pattern of the pack 3898 /// expansion. 3899 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3900 SourceLocation EllipsisLoc, 3901 llvm::Optional<unsigned> NumExpansions); 3902 3903 /// \brief Construct a pack expansion type from the pattern of the pack 3904 /// expansion. 3905 QualType CheckPackExpansion(QualType Pattern, 3906 SourceRange PatternRange, 3907 SourceLocation EllipsisLoc, 3908 llvm::Optional<unsigned> NumExpansions); 3909 3910 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3911 /// creates a pack expansion. 3912 /// 3913 /// \param Pattern The expression preceding the ellipsis, which will become 3914 /// the pattern of the pack expansion. 3915 /// 3916 /// \param EllipsisLoc The location of the ellipsis. 3917 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3918 3919 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3920 /// creates a pack expansion. 3921 /// 3922 /// \param Pattern The expression preceding the ellipsis, which will become 3923 /// the pattern of the pack expansion. 3924 /// 3925 /// \param EllipsisLoc The location of the ellipsis. 3926 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3927 llvm::Optional<unsigned> NumExpansions); 3928 3929 /// \brief Determine whether we could expand a pack expansion with the 3930 /// given set of parameter packs into separate arguments by repeatedly 3931 /// transforming the pattern. 3932 /// 3933 /// \param EllipsisLoc The location of the ellipsis that identifies the 3934 /// pack expansion. 3935 /// 3936 /// \param PatternRange The source range that covers the entire pattern of 3937 /// the pack expansion. 3938 /// 3939 /// \param Unexpanded The set of unexpanded parameter packs within the 3940 /// pattern. 3941 /// 3942 /// \param NumUnexpanded The number of unexpanded parameter packs in 3943 /// \p Unexpanded. 3944 /// 3945 /// \param ShouldExpand Will be set to \c true if the transformer should 3946 /// expand the corresponding pack expansions into separate arguments. When 3947 /// set, \c NumExpansions must also be set. 3948 /// 3949 /// \param RetainExpansion Whether the caller should add an unexpanded 3950 /// pack expansion after all of the expanded arguments. This is used 3951 /// when extending explicitly-specified template argument packs per 3952 /// C++0x [temp.arg.explicit]p9. 3953 /// 3954 /// \param NumExpansions The number of separate arguments that will be in 3955 /// the expanded form of the corresponding pack expansion. This is both an 3956 /// input and an output parameter, which can be set by the caller if the 3957 /// number of expansions is known a priori (e.g., due to a prior substitution) 3958 /// and will be set by the callee when the number of expansions is known. 3959 /// The callee must set this value when \c ShouldExpand is \c true; it may 3960 /// set this value in other cases. 3961 /// 3962 /// \returns true if an error occurred (e.g., because the parameter packs 3963 /// are to be instantiated with arguments of different lengths), false 3964 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3965 /// must be set. 3966 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3967 SourceRange PatternRange, 3968 const UnexpandedParameterPack *Unexpanded, 3969 unsigned NumUnexpanded, 3970 const MultiLevelTemplateArgumentList &TemplateArgs, 3971 bool &ShouldExpand, 3972 bool &RetainExpansion, 3973 llvm::Optional<unsigned> &NumExpansions); 3974 3975 /// \brief Determine the number of arguments in the given pack expansion 3976 /// type. 3977 /// 3978 /// This routine already assumes that the pack expansion type can be 3979 /// expanded and that the number of arguments in the expansion is 3980 /// consistent across all of the unexpanded parameter packs in its pattern. 3981 unsigned getNumArgumentsInExpansion(QualType T, 3982 const MultiLevelTemplateArgumentList &TemplateArgs); 3983 3984 /// \brief Determine whether the given declarator contains any unexpanded 3985 /// parameter packs. 3986 /// 3987 /// This routine is used by the parser to disambiguate function declarators 3988 /// with an ellipsis prior to the ')', e.g., 3989 /// 3990 /// \code 3991 /// void f(T...); 3992 /// \endcode 3993 /// 3994 /// To determine whether we have an (unnamed) function parameter pack or 3995 /// a variadic function. 3996 /// 3997 /// \returns true if the declarator contains any unexpanded parameter packs, 3998 /// false otherwise. 3999 bool containsUnexpandedParameterPacks(Declarator &D); 4000 4001 //===--------------------------------------------------------------------===// 4002 // C++ Template Argument Deduction (C++ [temp.deduct]) 4003 //===--------------------------------------------------------------------===// 4004 4005 /// \brief Describes the result of template argument deduction. 4006 /// 4007 /// The TemplateDeductionResult enumeration describes the result of 4008 /// template argument deduction, as returned from 4009 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4010 /// structure provides additional information about the results of 4011 /// template argument deduction, e.g., the deduced template argument 4012 /// list (if successful) or the specific template parameters or 4013 /// deduced arguments that were involved in the failure. 4014 enum TemplateDeductionResult { 4015 /// \brief Template argument deduction was successful. 4016 TDK_Success = 0, 4017 /// \brief Template argument deduction exceeded the maximum template 4018 /// instantiation depth (which has already been diagnosed). 4019 TDK_InstantiationDepth, 4020 /// \brief Template argument deduction did not deduce a value 4021 /// for every template parameter. 4022 TDK_Incomplete, 4023 /// \brief Template argument deduction produced inconsistent 4024 /// deduced values for the given template parameter. 4025 TDK_Inconsistent, 4026 /// \brief Template argument deduction failed due to inconsistent 4027 /// cv-qualifiers on a template parameter type that would 4028 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4029 /// but were given a non-const "X". 4030 TDK_Underqualified, 4031 /// \brief Substitution of the deduced template argument values 4032 /// resulted in an error. 4033 TDK_SubstitutionFailure, 4034 /// \brief Substitution of the deduced template argument values 4035 /// into a non-deduced context produced a type or value that 4036 /// produces a type that does not match the original template 4037 /// arguments provided. 4038 TDK_NonDeducedMismatch, 4039 /// \brief When performing template argument deduction for a function 4040 /// template, there were too many call arguments. 4041 TDK_TooManyArguments, 4042 /// \brief When performing template argument deduction for a function 4043 /// template, there were too few call arguments. 4044 TDK_TooFewArguments, 4045 /// \brief The explicitly-specified template arguments were not valid 4046 /// template arguments for the given template. 4047 TDK_InvalidExplicitArguments, 4048 /// \brief The arguments included an overloaded function name that could 4049 /// not be resolved to a suitable function. 4050 TDK_FailedOverloadResolution 4051 }; 4052 4053 TemplateDeductionResult 4054 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4055 const TemplateArgumentList &TemplateArgs, 4056 sema::TemplateDeductionInfo &Info); 4057 4058 TemplateDeductionResult 4059 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4060 TemplateArgumentListInfo &ExplicitTemplateArgs, 4061 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4062 llvm::SmallVectorImpl<QualType> &ParamTypes, 4063 QualType *FunctionType, 4064 sema::TemplateDeductionInfo &Info); 4065 4066 TemplateDeductionResult 4067 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4068 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4069 unsigned NumExplicitlySpecified, 4070 FunctionDecl *&Specialization, 4071 sema::TemplateDeductionInfo &Info); 4072 4073 TemplateDeductionResult 4074 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4075 TemplateArgumentListInfo *ExplicitTemplateArgs, 4076 Expr **Args, unsigned NumArgs, 4077 FunctionDecl *&Specialization, 4078 sema::TemplateDeductionInfo &Info); 4079 4080 TemplateDeductionResult 4081 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4082 TemplateArgumentListInfo *ExplicitTemplateArgs, 4083 QualType ArgFunctionType, 4084 FunctionDecl *&Specialization, 4085 sema::TemplateDeductionInfo &Info); 4086 4087 TemplateDeductionResult 4088 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4089 QualType ToType, 4090 CXXConversionDecl *&Specialization, 4091 sema::TemplateDeductionInfo &Info); 4092 4093 TemplateDeductionResult 4094 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4095 TemplateArgumentListInfo *ExplicitTemplateArgs, 4096 FunctionDecl *&Specialization, 4097 sema::TemplateDeductionInfo &Info); 4098 4099 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4100 TypeSourceInfo *&Result); 4101 4102 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4103 FunctionTemplateDecl *FT2, 4104 SourceLocation Loc, 4105 TemplatePartialOrderingContext TPOC, 4106 unsigned NumCallArguments); 4107 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4108 UnresolvedSetIterator SEnd, 4109 TemplatePartialOrderingContext TPOC, 4110 unsigned NumCallArguments, 4111 SourceLocation Loc, 4112 const PartialDiagnostic &NoneDiag, 4113 const PartialDiagnostic &AmbigDiag, 4114 const PartialDiagnostic &CandidateDiag, 4115 bool Complain = true); 4116 4117 ClassTemplatePartialSpecializationDecl * 4118 getMoreSpecializedPartialSpecialization( 4119 ClassTemplatePartialSpecializationDecl *PS1, 4120 ClassTemplatePartialSpecializationDecl *PS2, 4121 SourceLocation Loc); 4122 4123 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4124 bool OnlyDeduced, 4125 unsigned Depth, 4126 llvm::SmallVectorImpl<bool> &Used); 4127 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4128 llvm::SmallVectorImpl<bool> &Deduced); 4129 4130 //===--------------------------------------------------------------------===// 4131 // C++ Template Instantiation 4132 // 4133 4134 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4135 const TemplateArgumentList *Innermost = 0, 4136 bool RelativeToPrimary = false, 4137 const FunctionDecl *Pattern = 0); 4138 4139 /// \brief A template instantiation that is currently in progress. 4140 struct ActiveTemplateInstantiation { 4141 /// \brief The kind of template instantiation we are performing 4142 enum InstantiationKind { 4143 /// We are instantiating a template declaration. The entity is 4144 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4145 TemplateInstantiation, 4146 4147 /// We are instantiating a default argument for a template 4148 /// parameter. The Entity is the template, and 4149 /// TemplateArgs/NumTemplateArguments provides the template 4150 /// arguments as specified. 4151 /// FIXME: Use a TemplateArgumentList 4152 DefaultTemplateArgumentInstantiation, 4153 4154 /// We are instantiating a default argument for a function. 4155 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4156 /// provides the template arguments as specified. 4157 DefaultFunctionArgumentInstantiation, 4158 4159 /// We are substituting explicit template arguments provided for 4160 /// a function template. The entity is a FunctionTemplateDecl. 4161 ExplicitTemplateArgumentSubstitution, 4162 4163 /// We are substituting template argument determined as part of 4164 /// template argument deduction for either a class template 4165 /// partial specialization or a function template. The 4166 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4167 /// a FunctionTemplateDecl. 4168 DeducedTemplateArgumentSubstitution, 4169 4170 /// We are substituting prior template arguments into a new 4171 /// template parameter. The template parameter itself is either a 4172 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4173 PriorTemplateArgumentSubstitution, 4174 4175 /// We are checking the validity of a default template argument that 4176 /// has been used when naming a template-id. 4177 DefaultTemplateArgumentChecking 4178 } Kind; 4179 4180 /// \brief The point of instantiation within the source code. 4181 SourceLocation PointOfInstantiation; 4182 4183 /// \brief The template (or partial specialization) in which we are 4184 /// performing the instantiation, for substitutions of prior template 4185 /// arguments. 4186 NamedDecl *Template; 4187 4188 /// \brief The entity that is being instantiated. 4189 uintptr_t Entity; 4190 4191 /// \brief The list of template arguments we are substituting, if they 4192 /// are not part of the entity. 4193 const TemplateArgument *TemplateArgs; 4194 4195 /// \brief The number of template arguments in TemplateArgs. 4196 unsigned NumTemplateArgs; 4197 4198 /// \brief The template deduction info object associated with the 4199 /// substitution or checking of explicit or deduced template arguments. 4200 sema::TemplateDeductionInfo *DeductionInfo; 4201 4202 /// \brief The source range that covers the construct that cause 4203 /// the instantiation, e.g., the template-id that causes a class 4204 /// template instantiation. 4205 SourceRange InstantiationRange; 4206 4207 ActiveTemplateInstantiation() 4208 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4209 NumTemplateArgs(0), DeductionInfo(0) {} 4210 4211 /// \brief Determines whether this template is an actual instantiation 4212 /// that should be counted toward the maximum instantiation depth. 4213 bool isInstantiationRecord() const; 4214 4215 friend bool operator==(const ActiveTemplateInstantiation &X, 4216 const ActiveTemplateInstantiation &Y) { 4217 if (X.Kind != Y.Kind) 4218 return false; 4219 4220 if (X.Entity != Y.Entity) 4221 return false; 4222 4223 switch (X.Kind) { 4224 case TemplateInstantiation: 4225 return true; 4226 4227 case PriorTemplateArgumentSubstitution: 4228 case DefaultTemplateArgumentChecking: 4229 if (X.Template != Y.Template) 4230 return false; 4231 4232 // Fall through 4233 4234 case DefaultTemplateArgumentInstantiation: 4235 case ExplicitTemplateArgumentSubstitution: 4236 case DeducedTemplateArgumentSubstitution: 4237 case DefaultFunctionArgumentInstantiation: 4238 return X.TemplateArgs == Y.TemplateArgs; 4239 4240 } 4241 4242 return true; 4243 } 4244 4245 friend bool operator!=(const ActiveTemplateInstantiation &X, 4246 const ActiveTemplateInstantiation &Y) { 4247 return !(X == Y); 4248 } 4249 }; 4250 4251 /// \brief List of active template instantiations. 4252 /// 4253 /// This vector is treated as a stack. As one template instantiation 4254 /// requires another template instantiation, additional 4255 /// instantiations are pushed onto the stack up to a 4256 /// user-configurable limit LangOptions::InstantiationDepth. 4257 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4258 ActiveTemplateInstantiations; 4259 4260 /// \brief Whether we are in a SFINAE context that is not associated with 4261 /// template instantiation. 4262 /// 4263 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4264 /// of a template instantiation or template argument deduction. 4265 bool InNonInstantiationSFINAEContext; 4266 4267 /// \brief The number of ActiveTemplateInstantiation entries in 4268 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4269 /// therefore, should not be counted as part of the instantiation depth. 4270 unsigned NonInstantiationEntries; 4271 4272 /// \brief The last template from which a template instantiation 4273 /// error or warning was produced. 4274 /// 4275 /// This value is used to suppress printing of redundant template 4276 /// instantiation backtraces when there are multiple errors in the 4277 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4278 /// to implement it anywhere else. 4279 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4280 4281 /// \brief The current index into pack expansion arguments that will be 4282 /// used for substitution of parameter packs. 4283 /// 4284 /// The pack expansion index will be -1 to indicate that parameter packs 4285 /// should be instantiated as themselves. Otherwise, the index specifies 4286 /// which argument within the parameter pack will be used for substitution. 4287 int ArgumentPackSubstitutionIndex; 4288 4289 /// \brief RAII object used to change the argument pack substitution index 4290 /// within a \c Sema object. 4291 /// 4292 /// See \c ArgumentPackSubstitutionIndex for more information. 4293 class ArgumentPackSubstitutionIndexRAII { 4294 Sema &Self; 4295 int OldSubstitutionIndex; 4296 4297 public: 4298 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4299 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4300 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4301 } 4302 4303 ~ArgumentPackSubstitutionIndexRAII() { 4304 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4305 } 4306 }; 4307 4308 friend class ArgumentPackSubstitutionRAII; 4309 4310 /// \brief The stack of calls expression undergoing template instantiation. 4311 /// 4312 /// The top of this stack is used by a fixit instantiating unresolved 4313 /// function calls to fix the AST to match the textual change it prints. 4314 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4315 4316 /// \brief For each declaration that involved template argument deduction, the 4317 /// set of diagnostics that were suppressed during that template argument 4318 /// deduction. 4319 /// 4320 /// FIXME: Serialize this structure to the AST file. 4321 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4322 SuppressedDiagnostics; 4323 4324 /// \brief A stack object to be created when performing template 4325 /// instantiation. 4326 /// 4327 /// Construction of an object of type \c InstantiatingTemplate 4328 /// pushes the current instantiation onto the stack of active 4329 /// instantiations. If the size of this stack exceeds the maximum 4330 /// number of recursive template instantiations, construction 4331 /// produces an error and evaluates true. 4332 /// 4333 /// Destruction of this object will pop the named instantiation off 4334 /// the stack. 4335 struct InstantiatingTemplate { 4336 /// \brief Note that we are instantiating a class template, 4337 /// function template, or a member thereof. 4338 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4339 Decl *Entity, 4340 SourceRange InstantiationRange = SourceRange()); 4341 4342 /// \brief Note that we are instantiating a default argument in a 4343 /// template-id. 4344 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4345 TemplateDecl *Template, 4346 const TemplateArgument *TemplateArgs, 4347 unsigned NumTemplateArgs, 4348 SourceRange InstantiationRange = SourceRange()); 4349 4350 /// \brief Note that we are instantiating a default argument in a 4351 /// template-id. 4352 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4353 FunctionTemplateDecl *FunctionTemplate, 4354 const TemplateArgument *TemplateArgs, 4355 unsigned NumTemplateArgs, 4356 ActiveTemplateInstantiation::InstantiationKind Kind, 4357 sema::TemplateDeductionInfo &DeductionInfo, 4358 SourceRange InstantiationRange = SourceRange()); 4359 4360 /// \brief Note that we are instantiating as part of template 4361 /// argument deduction for a class template partial 4362 /// specialization. 4363 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4364 ClassTemplatePartialSpecializationDecl *PartialSpec, 4365 const TemplateArgument *TemplateArgs, 4366 unsigned NumTemplateArgs, 4367 sema::TemplateDeductionInfo &DeductionInfo, 4368 SourceRange InstantiationRange = SourceRange()); 4369 4370 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4371 ParmVarDecl *Param, 4372 const TemplateArgument *TemplateArgs, 4373 unsigned NumTemplateArgs, 4374 SourceRange InstantiationRange = SourceRange()); 4375 4376 /// \brief Note that we are substituting prior template arguments into a 4377 /// non-type or template template parameter. 4378 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4379 NamedDecl *Template, 4380 NonTypeTemplateParmDecl *Param, 4381 const TemplateArgument *TemplateArgs, 4382 unsigned NumTemplateArgs, 4383 SourceRange InstantiationRange); 4384 4385 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4386 NamedDecl *Template, 4387 TemplateTemplateParmDecl *Param, 4388 const TemplateArgument *TemplateArgs, 4389 unsigned NumTemplateArgs, 4390 SourceRange InstantiationRange); 4391 4392 /// \brief Note that we are checking the default template argument 4393 /// against the template parameter for a given template-id. 4394 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4395 TemplateDecl *Template, 4396 NamedDecl *Param, 4397 const TemplateArgument *TemplateArgs, 4398 unsigned NumTemplateArgs, 4399 SourceRange InstantiationRange); 4400 4401 4402 /// \brief Note that we have finished instantiating this template. 4403 void Clear(); 4404 4405 ~InstantiatingTemplate() { Clear(); } 4406 4407 /// \brief Determines whether we have exceeded the maximum 4408 /// recursive template instantiations. 4409 operator bool() const { return Invalid; } 4410 4411 private: 4412 Sema &SemaRef; 4413 bool Invalid; 4414 bool SavedInNonInstantiationSFINAEContext; 4415 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4416 SourceRange InstantiationRange); 4417 4418 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4419 4420 InstantiatingTemplate& 4421 operator=(const InstantiatingTemplate&); // not implemented 4422 }; 4423 4424 void PrintInstantiationStack(); 4425 4426 /// \brief Determines whether we are currently in a context where 4427 /// template argument substitution failures are not considered 4428 /// errors. 4429 /// 4430 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4431 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4432 /// template-deduction context object, which can be used to capture 4433 /// diagnostics that will be suppressed. 4434 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4435 4436 /// \brief RAII class used to determine whether SFINAE has 4437 /// trapped any errors that occur during template argument 4438 /// deduction.` 4439 class SFINAETrap { 4440 Sema &SemaRef; 4441 unsigned PrevSFINAEErrors; 4442 bool PrevInNonInstantiationSFINAEContext; 4443 bool PrevAccessCheckingSFINAE; 4444 4445 public: 4446 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4447 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4448 PrevInNonInstantiationSFINAEContext( 4449 SemaRef.InNonInstantiationSFINAEContext), 4450 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4451 { 4452 if (!SemaRef.isSFINAEContext()) 4453 SemaRef.InNonInstantiationSFINAEContext = true; 4454 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4455 } 4456 4457 ~SFINAETrap() { 4458 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4459 SemaRef.InNonInstantiationSFINAEContext 4460 = PrevInNonInstantiationSFINAEContext; 4461 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4462 } 4463 4464 /// \brief Determine whether any SFINAE errors have been trapped. 4465 bool hasErrorOccurred() const { 4466 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4467 } 4468 }; 4469 4470 /// \brief The current instantiation scope used to store local 4471 /// variables. 4472 LocalInstantiationScope *CurrentInstantiationScope; 4473 4474 /// \brief The number of typos corrected by CorrectTypo. 4475 unsigned TyposCorrected; 4476 4477 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4478 UnqualifiedTyposCorrectedMap; 4479 4480 /// \brief A cache containing the results of typo correction for unqualified 4481 /// name lookup. 4482 /// 4483 /// The string is the string that we corrected to (which may be empty, if 4484 /// there was no correction), while the boolean will be true when the 4485 /// string represents a keyword. 4486 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4487 4488 /// \brief Worker object for performing CFG-based warnings. 4489 sema::AnalysisBasedWarnings AnalysisWarnings; 4490 4491 /// \brief An entity for which implicit template instantiation is required. 4492 /// 4493 /// The source location associated with the declaration is the first place in 4494 /// the source code where the declaration was "used". It is not necessarily 4495 /// the point of instantiation (which will be either before or after the 4496 /// namespace-scope declaration that triggered this implicit instantiation), 4497 /// However, it is the location that diagnostics should generally refer to, 4498 /// because users will need to know what code triggered the instantiation. 4499 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4500 4501 /// \brief The queue of implicit template instantiations that are required 4502 /// but have not yet been performed. 4503 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4504 4505 /// \brief The queue of implicit template instantiations that are required 4506 /// and must be performed within the current local scope. 4507 /// 4508 /// This queue is only used for member functions of local classes in 4509 /// templates, which must be instantiated in the same scope as their 4510 /// enclosing function, so that they can reference function-local 4511 /// types, static variables, enumerators, etc. 4512 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4513 4514 bool PerformPendingInstantiations(bool LocalOnly = false); 4515 4516 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4517 const MultiLevelTemplateArgumentList &TemplateArgs, 4518 SourceLocation Loc, DeclarationName Entity); 4519 4520 QualType SubstType(QualType T, 4521 const MultiLevelTemplateArgumentList &TemplateArgs, 4522 SourceLocation Loc, DeclarationName Entity); 4523 4524 TypeSourceInfo *SubstType(TypeLoc TL, 4525 const MultiLevelTemplateArgumentList &TemplateArgs, 4526 SourceLocation Loc, DeclarationName Entity); 4527 4528 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4529 const MultiLevelTemplateArgumentList &TemplateArgs, 4530 SourceLocation Loc, 4531 DeclarationName Entity); 4532 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4533 const MultiLevelTemplateArgumentList &TemplateArgs, 4534 int indexAdjustment, 4535 llvm::Optional<unsigned> NumExpansions); 4536 bool SubstParmTypes(SourceLocation Loc, 4537 ParmVarDecl **Params, unsigned NumParams, 4538 const MultiLevelTemplateArgumentList &TemplateArgs, 4539 llvm::SmallVectorImpl<QualType> &ParamTypes, 4540 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4541 ExprResult SubstExpr(Expr *E, 4542 const MultiLevelTemplateArgumentList &TemplateArgs); 4543 4544 /// \brief Substitute the given template arguments into a list of 4545 /// expressions, expanding pack expansions if required. 4546 /// 4547 /// \param Exprs The list of expressions to substitute into. 4548 /// 4549 /// \param NumExprs The number of expressions in \p Exprs. 4550 /// 4551 /// \param IsCall Whether this is some form of call, in which case 4552 /// default arguments will be dropped. 4553 /// 4554 /// \param TemplateArgs The set of template arguments to substitute. 4555 /// 4556 /// \param Outputs Will receive all of the substituted arguments. 4557 /// 4558 /// \returns true if an error occurred, false otherwise. 4559 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4560 const MultiLevelTemplateArgumentList &TemplateArgs, 4561 llvm::SmallVectorImpl<Expr *> &Outputs); 4562 4563 StmtResult SubstStmt(Stmt *S, 4564 const MultiLevelTemplateArgumentList &TemplateArgs); 4565 4566 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4567 const MultiLevelTemplateArgumentList &TemplateArgs); 4568 4569 bool 4570 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4571 CXXRecordDecl *Pattern, 4572 const MultiLevelTemplateArgumentList &TemplateArgs); 4573 4574 bool 4575 InstantiateClass(SourceLocation PointOfInstantiation, 4576 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4577 const MultiLevelTemplateArgumentList &TemplateArgs, 4578 TemplateSpecializationKind TSK, 4579 bool Complain = true); 4580 4581 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4582 Decl *Pattern, Decl *Inst); 4583 4584 bool 4585 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4586 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4587 TemplateSpecializationKind TSK, 4588 bool Complain = true); 4589 4590 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4591 CXXRecordDecl *Instantiation, 4592 const MultiLevelTemplateArgumentList &TemplateArgs, 4593 TemplateSpecializationKind TSK); 4594 4595 void InstantiateClassTemplateSpecializationMembers( 4596 SourceLocation PointOfInstantiation, 4597 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4598 TemplateSpecializationKind TSK); 4599 4600 NestedNameSpecifierLoc 4601 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4602 const MultiLevelTemplateArgumentList &TemplateArgs); 4603 4604 DeclarationNameInfo 4605 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4606 const MultiLevelTemplateArgumentList &TemplateArgs); 4607 TemplateName 4608 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4609 SourceLocation Loc, 4610 const MultiLevelTemplateArgumentList &TemplateArgs); 4611 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4612 TemplateArgumentListInfo &Result, 4613 const MultiLevelTemplateArgumentList &TemplateArgs); 4614 4615 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4616 FunctionDecl *Function, 4617 bool Recursive = false, 4618 bool DefinitionRequired = false); 4619 void InstantiateStaticDataMemberDefinition( 4620 SourceLocation PointOfInstantiation, 4621 VarDecl *Var, 4622 bool Recursive = false, 4623 bool DefinitionRequired = false); 4624 4625 void InstantiateMemInitializers(CXXConstructorDecl *New, 4626 const CXXConstructorDecl *Tmpl, 4627 const MultiLevelTemplateArgumentList &TemplateArgs); 4628 4629 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4630 const MultiLevelTemplateArgumentList &TemplateArgs); 4631 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4632 const MultiLevelTemplateArgumentList &TemplateArgs); 4633 4634 // Objective-C declarations. 4635 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4636 IdentifierInfo *ClassName, 4637 SourceLocation ClassLoc, 4638 IdentifierInfo *SuperName, 4639 SourceLocation SuperLoc, 4640 Decl * const *ProtoRefs, 4641 unsigned NumProtoRefs, 4642 const SourceLocation *ProtoLocs, 4643 SourceLocation EndProtoLoc, 4644 AttributeList *AttrList); 4645 4646 Decl *ActOnCompatiblityAlias( 4647 SourceLocation AtCompatibilityAliasLoc, 4648 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4649 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4650 4651 void CheckForwardProtocolDeclarationForCircularDependency( 4652 IdentifierInfo *PName, 4653 SourceLocation &PLoc, SourceLocation PrevLoc, 4654 const ObjCList<ObjCProtocolDecl> &PList); 4655 4656 Decl *ActOnStartProtocolInterface( 4657 SourceLocation AtProtoInterfaceLoc, 4658 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4659 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4660 const SourceLocation *ProtoLocs, 4661 SourceLocation EndProtoLoc, 4662 AttributeList *AttrList); 4663 4664 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4665 IdentifierInfo *ClassName, 4666 SourceLocation ClassLoc, 4667 IdentifierInfo *CategoryName, 4668 SourceLocation CategoryLoc, 4669 Decl * const *ProtoRefs, 4670 unsigned NumProtoRefs, 4671 const SourceLocation *ProtoLocs, 4672 SourceLocation EndProtoLoc); 4673 4674 Decl *ActOnStartClassImplementation( 4675 SourceLocation AtClassImplLoc, 4676 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4677 IdentifierInfo *SuperClassname, 4678 SourceLocation SuperClassLoc); 4679 4680 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4681 IdentifierInfo *ClassName, 4682 SourceLocation ClassLoc, 4683 IdentifierInfo *CatName, 4684 SourceLocation CatLoc); 4685 4686 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4687 IdentifierInfo **IdentList, 4688 SourceLocation *IdentLocs, 4689 unsigned NumElts); 4690 4691 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4692 const IdentifierLocPair *IdentList, 4693 unsigned NumElts, 4694 AttributeList *attrList); 4695 4696 void FindProtocolDeclaration(bool WarnOnDeclarations, 4697 const IdentifierLocPair *ProtocolId, 4698 unsigned NumProtocols, 4699 llvm::SmallVectorImpl<Decl *> &Protocols); 4700 4701 /// Ensure attributes are consistent with type. 4702 /// \param [in, out] Attributes The attributes to check; they will 4703 /// be modified to be consistent with \arg PropertyTy. 4704 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4705 SourceLocation Loc, 4706 unsigned &Attributes); 4707 4708 /// Process the specified property declaration and create decls for the 4709 /// setters and getters as needed. 4710 /// \param property The property declaration being processed 4711 /// \param DC The semantic container for the property 4712 /// \param redeclaredProperty Declaration for property if redeclared 4713 /// in class extension. 4714 /// \param lexicalDC Container for redeclaredProperty. 4715 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4716 ObjCContainerDecl *DC, 4717 ObjCPropertyDecl *redeclaredProperty = 0, 4718 ObjCContainerDecl *lexicalDC = 0); 4719 4720 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4721 ObjCPropertyDecl *SuperProperty, 4722 const IdentifierInfo *Name); 4723 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4724 4725 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4726 ObjCMethodDecl *MethodDecl, 4727 bool IsInstance); 4728 4729 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4730 4731 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4732 ObjCInterfaceDecl *ID); 4733 4734 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4735 ObjCProtocolDecl *PDecl); 4736 4737 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4738 Decl **allMethods = 0, unsigned allNum = 0, 4739 Decl **allProperties = 0, unsigned pNum = 0, 4740 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4741 4742 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4743 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4744 Selector GetterSel, Selector SetterSel, 4745 Decl *ClassCategory, 4746 bool *OverridingProperty, 4747 tok::ObjCKeywordKind MethodImplKind, 4748 DeclContext *lexicalDC = 0); 4749 4750 Decl *ActOnPropertyImplDecl(Scope *S, 4751 SourceLocation AtLoc, 4752 SourceLocation PropertyLoc, 4753 bool ImplKind,Decl *ClassImplDecl, 4754 IdentifierInfo *PropertyId, 4755 IdentifierInfo *PropertyIvar, 4756 SourceLocation PropertyIvarLoc); 4757 4758 struct ObjCArgInfo { 4759 IdentifierInfo *Name; 4760 SourceLocation NameLoc; 4761 // The Type is null if no type was specified, and the DeclSpec is invalid 4762 // in this case. 4763 ParsedType Type; 4764 ObjCDeclSpec DeclSpec; 4765 4766 /// ArgAttrs - Attribute list for this argument. 4767 AttributeList *ArgAttrs; 4768 }; 4769 4770 Decl *ActOnMethodDeclaration( 4771 Scope *S, 4772 SourceLocation BeginLoc, // location of the + or -. 4773 SourceLocation EndLoc, // location of the ; or {. 4774 tok::TokenKind MethodType, 4775 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4776 Selector Sel, 4777 // optional arguments. The number of types/arguments is obtained 4778 // from the Sel.getNumArgs(). 4779 ObjCArgInfo *ArgInfo, 4780 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4781 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4782 bool isVariadic, bool MethodDefinition); 4783 4784 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4785 // Will search "local" class/category implementations for a method decl. 4786 // Will also search in class's root looking for instance method. 4787 // Returns 0 if no method is found. 4788 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4789 ObjCInterfaceDecl *CDecl); 4790 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4791 ObjCInterfaceDecl *ClassDecl); 4792 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 4793 const ObjCObjectPointerType *OPT, 4794 bool IsInstance); 4795 4796 ExprResult 4797 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4798 Expr *BaseExpr, 4799 DeclarationName MemberName, 4800 SourceLocation MemberLoc, 4801 SourceLocation SuperLoc, QualType SuperType, 4802 bool Super); 4803 4804 ExprResult 4805 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4806 IdentifierInfo &propertyName, 4807 SourceLocation receiverNameLoc, 4808 SourceLocation propertyNameLoc); 4809 4810 ObjCMethodDecl *tryCaptureObjCSelf(); 4811 4812 /// \brief Describes the kind of message expression indicated by a message 4813 /// send that starts with an identifier. 4814 enum ObjCMessageKind { 4815 /// \brief The message is sent to 'super'. 4816 ObjCSuperMessage, 4817 /// \brief The message is an instance message. 4818 ObjCInstanceMessage, 4819 /// \brief The message is a class message, and the identifier is a type 4820 /// name. 4821 ObjCClassMessage 4822 }; 4823 4824 ObjCMessageKind getObjCMessageKind(Scope *S, 4825 IdentifierInfo *Name, 4826 SourceLocation NameLoc, 4827 bool IsSuper, 4828 bool HasTrailingDot, 4829 ParsedType &ReceiverType); 4830 4831 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4832 Selector Sel, 4833 SourceLocation LBracLoc, 4834 SourceLocation SelectorLoc, 4835 SourceLocation RBracLoc, 4836 MultiExprArg Args); 4837 4838 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4839 QualType ReceiverType, 4840 SourceLocation SuperLoc, 4841 Selector Sel, 4842 ObjCMethodDecl *Method, 4843 SourceLocation LBracLoc, 4844 SourceLocation SelectorLoc, 4845 SourceLocation RBracLoc, 4846 MultiExprArg Args); 4847 4848 ExprResult ActOnClassMessage(Scope *S, 4849 ParsedType Receiver, 4850 Selector Sel, 4851 SourceLocation LBracLoc, 4852 SourceLocation SelectorLoc, 4853 SourceLocation RBracLoc, 4854 MultiExprArg Args); 4855 4856 ExprResult BuildInstanceMessage(Expr *Receiver, 4857 QualType ReceiverType, 4858 SourceLocation SuperLoc, 4859 Selector Sel, 4860 ObjCMethodDecl *Method, 4861 SourceLocation LBracLoc, 4862 SourceLocation SelectorLoc, 4863 SourceLocation RBracLoc, 4864 MultiExprArg Args); 4865 4866 ExprResult ActOnInstanceMessage(Scope *S, 4867 Expr *Receiver, 4868 Selector Sel, 4869 SourceLocation LBracLoc, 4870 SourceLocation SelectorLoc, 4871 SourceLocation RBracLoc, 4872 MultiExprArg Args); 4873 4874 4875 enum PragmaOptionsAlignKind { 4876 POAK_Native, // #pragma options align=native 4877 POAK_Natural, // #pragma options align=natural 4878 POAK_Packed, // #pragma options align=packed 4879 POAK_Power, // #pragma options align=power 4880 POAK_Mac68k, // #pragma options align=mac68k 4881 POAK_Reset // #pragma options align=reset 4882 }; 4883 4884 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4885 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4886 SourceLocation PragmaLoc, 4887 SourceLocation KindLoc); 4888 4889 enum PragmaPackKind { 4890 PPK_Default, // #pragma pack([n]) 4891 PPK_Show, // #pragma pack(show), only supported by MSVC. 4892 PPK_Push, // #pragma pack(push, [identifier], [n]) 4893 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4894 }; 4895 4896 enum PragmaMSStructKind { 4897 PMSST_OFF, // #pragms ms_struct off 4898 PMSST_ON // #pragms ms_struct on 4899 }; 4900 4901 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4902 void ActOnPragmaPack(PragmaPackKind Kind, 4903 IdentifierInfo *Name, 4904 Expr *Alignment, 4905 SourceLocation PragmaLoc, 4906 SourceLocation LParenLoc, 4907 SourceLocation RParenLoc); 4908 4909 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 4910 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 4911 4912 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4913 void ActOnPragmaUnused(const Token &Identifier, 4914 Scope *curScope, 4915 SourceLocation PragmaLoc); 4916 4917 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4918 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4919 SourceLocation PragmaLoc); 4920 4921 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4922 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4923 4924 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4925 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4926 SourceLocation PragmaLoc, 4927 SourceLocation WeakNameLoc); 4928 4929 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4930 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4931 IdentifierInfo* AliasName, 4932 SourceLocation PragmaLoc, 4933 SourceLocation WeakNameLoc, 4934 SourceLocation AliasNameLoc); 4935 4936 /// ActOnPragmaFPContract - Called on well formed 4937 /// #pragma {STDC,OPENCL} FP_CONTRACT 4938 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4939 4940 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4941 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4942 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4943 4944 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 4945 void AddMsStructLayoutForRecord(RecordDecl *RD); 4946 4947 /// FreePackedContext - Deallocate and null out PackContext. 4948 void FreePackedContext(); 4949 4950 /// PushNamespaceVisibilityAttr - Note that we've entered a 4951 /// namespace with a visibility attribute. 4952 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4953 4954 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4955 /// add an appropriate visibility attribute. 4956 void AddPushedVisibilityAttribute(Decl *RD); 4957 4958 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4959 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4960 void PopPragmaVisibility(); 4961 4962 /// FreeVisContext - Deallocate and null out VisContext. 4963 void FreeVisContext(); 4964 4965 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4966 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4967 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4968 4969 /// CastCategory - Get the correct forwarded implicit cast result category 4970 /// from the inner expression. 4971 ExprValueKind CastCategory(Expr *E); 4972 4973 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4974 /// cast. If there is already an implicit cast, merge into the existing one. 4975 /// If isLvalue, the result of the cast is an lvalue. 4976 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 4977 ExprValueKind VK = VK_RValue, 4978 const CXXCastPath *BasePath = 0); 4979 4980 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 4981 /// to the conversion from scalar type ScalarTy to the Boolean type. 4982 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 4983 4984 /// IgnoredValueConversions - Given that an expression's result is 4985 /// syntactically ignored, perform any conversions that are 4986 /// required. 4987 ExprResult IgnoredValueConversions(Expr *E); 4988 4989 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4990 // functions and arrays to their respective pointers (C99 6.3.2.1). 4991 ExprResult UsualUnaryConversions(Expr *E); 4992 4993 // DefaultFunctionArrayConversion - converts functions and arrays 4994 // to their respective pointers (C99 6.3.2.1). 4995 ExprResult DefaultFunctionArrayConversion(Expr *E); 4996 4997 // DefaultFunctionArrayLvalueConversion - converts functions and 4998 // arrays to their respective pointers and performs the 4999 // lvalue-to-rvalue conversion. 5000 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5001 5002 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5003 // the operand. This is DefaultFunctionArrayLvalueConversion, 5004 // except that it assumes the operand isn't of function or array 5005 // type. 5006 ExprResult DefaultLvalueConversion(Expr *E); 5007 5008 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5009 // do not have a prototype. Integer promotions are performed on each 5010 // argument, and arguments that have type float are promoted to double. 5011 ExprResult DefaultArgumentPromotion(Expr *E); 5012 5013 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5014 enum VariadicCallType { 5015 VariadicFunction, 5016 VariadicBlock, 5017 VariadicMethod, 5018 VariadicConstructor, 5019 VariadicDoesNotApply 5020 }; 5021 5022 /// GatherArgumentsForCall - Collector argument expressions for various 5023 /// form of call prototypes. 5024 bool GatherArgumentsForCall(SourceLocation CallLoc, 5025 FunctionDecl *FDecl, 5026 const FunctionProtoType *Proto, 5027 unsigned FirstProtoArg, 5028 Expr **Args, unsigned NumArgs, 5029 llvm::SmallVector<Expr *, 8> &AllArgs, 5030 VariadicCallType CallType = VariadicDoesNotApply); 5031 5032 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5033 // will warn if the resulting type is not a POD type. 5034 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5035 FunctionDecl *FDecl); 5036 5037 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5038 // operands and then handles various conversions that are common to binary 5039 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5040 // routine returns the first non-arithmetic type found. The client is 5041 // responsible for emitting appropriate error diagnostics. 5042 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5043 bool isCompAssign = false); 5044 5045 /// AssignConvertType - All of the 'assignment' semantic checks return this 5046 /// enum to indicate whether the assignment was allowed. These checks are 5047 /// done for simple assignments, as well as initialization, return from 5048 /// function, argument passing, etc. The query is phrased in terms of a 5049 /// source and destination type. 5050 enum AssignConvertType { 5051 /// Compatible - the types are compatible according to the standard. 5052 Compatible, 5053 5054 /// PointerToInt - The assignment converts a pointer to an int, which we 5055 /// accept as an extension. 5056 PointerToInt, 5057 5058 /// IntToPointer - The assignment converts an int to a pointer, which we 5059 /// accept as an extension. 5060 IntToPointer, 5061 5062 /// FunctionVoidPointer - The assignment is between a function pointer and 5063 /// void*, which the standard doesn't allow, but we accept as an extension. 5064 FunctionVoidPointer, 5065 5066 /// IncompatiblePointer - The assignment is between two pointers types that 5067 /// are not compatible, but we accept them as an extension. 5068 IncompatiblePointer, 5069 5070 /// IncompatiblePointer - The assignment is between two pointers types which 5071 /// point to integers which have a different sign, but are otherwise identical. 5072 /// This is a subset of the above, but broken out because it's by far the most 5073 /// common case of incompatible pointers. 5074 IncompatiblePointerSign, 5075 5076 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5077 /// c/v/r qualifiers, which we accept as an extension. 5078 CompatiblePointerDiscardsQualifiers, 5079 5080 /// IncompatiblePointerDiscardsQualifiers - The assignment 5081 /// discards qualifiers that we don't permit to be discarded, 5082 /// like address spaces. 5083 IncompatiblePointerDiscardsQualifiers, 5084 5085 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5086 /// nested pointer types, and the qualifiers other than the first two 5087 /// levels differ e.g. char ** -> const char **, but we accept them as an 5088 /// extension. 5089 IncompatibleNestedPointerQualifiers, 5090 5091 /// IncompatibleVectors - The assignment is between two vector types that 5092 /// have the same size, which we accept as an extension. 5093 IncompatibleVectors, 5094 5095 /// IntToBlockPointer - The assignment converts an int to a block 5096 /// pointer. We disallow this. 5097 IntToBlockPointer, 5098 5099 /// IncompatibleBlockPointer - The assignment is between two block 5100 /// pointers types that are not compatible. 5101 IncompatibleBlockPointer, 5102 5103 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5104 /// id type and something else (that is incompatible with it). For example, 5105 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5106 IncompatibleObjCQualifiedId, 5107 5108 /// Incompatible - We reject this conversion outright, it is invalid to 5109 /// represent it in the AST. 5110 Incompatible 5111 }; 5112 5113 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5114 /// assignment conversion type specified by ConvTy. This returns true if the 5115 /// conversion was invalid or false if the conversion was accepted. 5116 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5117 SourceLocation Loc, 5118 QualType DstType, QualType SrcType, 5119 Expr *SrcExpr, AssignmentAction Action, 5120 bool *Complained = 0); 5121 5122 /// CheckAssignmentConstraints - Perform type checking for assignment, 5123 /// argument passing, variable initialization, and function return values. 5124 /// C99 6.5.16. 5125 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5126 QualType lhs, QualType rhs); 5127 5128 /// Check assignment constraints and prepare for a conversion of the 5129 /// RHS to the LHS type. 5130 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5131 CastKind &Kind); 5132 5133 // CheckSingleAssignmentConstraints - Currently used by 5134 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5135 // this routine performs the default function/array converions. 5136 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5137 ExprResult &rExprRes); 5138 5139 // \brief If the lhs type is a transparent union, check whether we 5140 // can initialize the transparent union with the given expression. 5141 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5142 ExprResult &rExpr); 5143 5144 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5145 5146 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5147 5148 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5149 AssignmentAction Action, 5150 bool AllowExplicit = false); 5151 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5152 AssignmentAction Action, 5153 bool AllowExplicit, 5154 ImplicitConversionSequence& ICS); 5155 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5156 const ImplicitConversionSequence& ICS, 5157 AssignmentAction Action, 5158 bool CStyle = false); 5159 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5160 const StandardConversionSequence& SCS, 5161 AssignmentAction Action, 5162 bool CStyle); 5163 5164 /// the following "Check" methods will return a valid/converted QualType 5165 /// or a null QualType (indicating an error diagnostic was issued). 5166 5167 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5168 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5169 QualType CheckPointerToMemberOperands( // C++ 5.5 5170 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5171 SourceLocation OpLoc, bool isIndirect); 5172 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5173 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5174 bool isDivide); 5175 QualType CheckRemainderOperands( // C99 6.5.5 5176 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5177 QualType CheckAdditionOperands( // C99 6.5.6 5178 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5179 QualType CheckSubtractionOperands( // C99 6.5.6 5180 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5181 QualType CheckShiftOperands( // C99 6.5.7 5182 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5183 bool isCompAssign = false); 5184 QualType CheckCompareOperands( // C99 6.5.8/9 5185 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5186 bool isRelational); 5187 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5188 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5189 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5190 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5191 // CheckAssignmentOperands is used for both simple and compound assignment. 5192 // For simple assignment, pass both expressions and a null converted type. 5193 // For compound assignment, pass both expressions and the converted type. 5194 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5195 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5196 5197 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5198 ExprResult ConvertPropertyForRValue(Expr *E); 5199 5200 QualType CheckConditionalOperands( // C99 6.5.15 5201 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5202 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5203 QualType CXXCheckConditionalOperands( // C++ 5.16 5204 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5205 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5206 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5207 bool *NonStandardCompositeType = 0); 5208 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5209 bool *NonStandardCompositeType = 0) { 5210 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5211 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5212 E1 = Owned(E1Tmp); 5213 E2 = Owned(E2Tmp); 5214 return Composite; 5215 } 5216 5217 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5218 SourceLocation questionLoc); 5219 5220 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5221 SourceLocation QuestionLoc); 5222 5223 /// type checking for vector binary operators. 5224 QualType CheckVectorOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5225 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5226 SourceLocation l, bool isRel); 5227 5228 /// type checking declaration initializers (C99 6.7.8) 5229 bool CheckInitList(const InitializedEntity &Entity, 5230 InitListExpr *&InitList, QualType &DeclType); 5231 bool CheckForConstantInitializer(Expr *e, QualType t); 5232 5233 // type checking C++ declaration initializers (C++ [dcl.init]). 5234 5235 /// ReferenceCompareResult - Expresses the result of comparing two 5236 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5237 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5238 enum ReferenceCompareResult { 5239 /// Ref_Incompatible - The two types are incompatible, so direct 5240 /// reference binding is not possible. 5241 Ref_Incompatible = 0, 5242 /// Ref_Related - The two types are reference-related, which means 5243 /// that their unqualified forms (T1 and T2) are either the same 5244 /// or T1 is a base class of T2. 5245 Ref_Related, 5246 /// Ref_Compatible_With_Added_Qualification - The two types are 5247 /// reference-compatible with added qualification, meaning that 5248 /// they are reference-compatible and the qualifiers on T1 (cv1) 5249 /// are greater than the qualifiers on T2 (cv2). 5250 Ref_Compatible_With_Added_Qualification, 5251 /// Ref_Compatible - The two types are reference-compatible and 5252 /// have equivalent qualifiers (cv1 == cv2). 5253 Ref_Compatible 5254 }; 5255 5256 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5257 QualType T1, QualType T2, 5258 bool &DerivedToBase, 5259 bool &ObjCConversion); 5260 5261 /// CheckCastTypes - Check type constraints for casting between types under 5262 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5263 ExprResult CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *CastExpr, 5264 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 5265 bool FunctionalStyle = false); 5266 5267 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5268 Expr *castExpr, CastKind &castKind, 5269 ExprValueKind &valueKind, CXXCastPath &BasePath); 5270 5271 // CheckVectorCast - check type constraints for vectors. 5272 // Since vectors are an extension, there are no C standard reference for this. 5273 // We allow casting between vectors and integer datatypes of the same size. 5274 // returns true if the cast is invalid 5275 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5276 CastKind &Kind); 5277 5278 // CheckExtVectorCast - check type constraints for extended vectors. 5279 // Since vectors are an extension, there are no C standard reference for this. 5280 // We allow casting between vectors and integer datatypes of the same size, 5281 // or vectors and the element type of that vector. 5282 // returns the cast expr 5283 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5284 CastKind &Kind); 5285 5286 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5287 /// cast under C++ semantics. 5288 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5289 Expr *CastExpr, CastKind &Kind, 5290 CXXCastPath &BasePath, bool FunctionalStyle); 5291 5292 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5293 /// \param Method - May be null. 5294 /// \param [out] ReturnType - The return type of the send. 5295 /// \return true iff there were any incompatible types. 5296 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5297 ObjCMethodDecl *Method, bool isClassMessage, 5298 SourceLocation lbrac, SourceLocation rbrac, 5299 QualType &ReturnType, ExprValueKind &VK); 5300 5301 /// CheckBooleanCondition - Diagnose problems involving the use of 5302 /// the given expression as a boolean condition (e.g. in an if 5303 /// statement). Also performs the standard function and array 5304 /// decays, possibly changing the input variable. 5305 /// 5306 /// \param Loc - A location associated with the condition, e.g. the 5307 /// 'if' keyword. 5308 /// \return true iff there were any errors 5309 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5310 5311 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5312 Expr *SubExpr); 5313 5314 /// DiagnoseAssignmentAsCondition - Given that an expression is 5315 /// being used as a boolean condition, warn if it's an assignment. 5316 void DiagnoseAssignmentAsCondition(Expr *E); 5317 5318 /// \brief Redundant parentheses over an equality comparison can indicate 5319 /// that the user intended an assignment used as condition. 5320 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5321 5322 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5323 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5324 5325 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5326 /// the specified width and sign. If an overflow occurs, detect it and emit 5327 /// the specified diagnostic. 5328 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5329 unsigned NewWidth, bool NewSign, 5330 SourceLocation Loc, unsigned DiagID); 5331 5332 /// Checks that the Objective-C declaration is declared in the global scope. 5333 /// Emits an error and marks the declaration as invalid if it's not declared 5334 /// in the global scope. 5335 bool CheckObjCDeclScope(Decl *D); 5336 5337 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5338 /// and reports the appropriate diagnostics. Returns false on success. 5339 /// Can optionally return the value of the expression. 5340 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5341 5342 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5343 /// the correct width, and that the field type is valid. 5344 /// Returns false on success. 5345 /// Can optionally return whether the bit-field is of width 0 5346 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5347 QualType FieldTy, const Expr *BitWidth, 5348 bool *ZeroWidth = 0); 5349 5350 /// \name Code completion 5351 //@{ 5352 /// \brief Describes the context in which code completion occurs. 5353 enum ParserCompletionContext { 5354 /// \brief Code completion occurs at top-level or namespace context. 5355 PCC_Namespace, 5356 /// \brief Code completion occurs within a class, struct, or union. 5357 PCC_Class, 5358 /// \brief Code completion occurs within an Objective-C interface, protocol, 5359 /// or category. 5360 PCC_ObjCInterface, 5361 /// \brief Code completion occurs within an Objective-C implementation or 5362 /// category implementation 5363 PCC_ObjCImplementation, 5364 /// \brief Code completion occurs within the list of instance variables 5365 /// in an Objective-C interface, protocol, category, or implementation. 5366 PCC_ObjCInstanceVariableList, 5367 /// \brief Code completion occurs following one or more template 5368 /// headers. 5369 PCC_Template, 5370 /// \brief Code completion occurs following one or more template 5371 /// headers within a class. 5372 PCC_MemberTemplate, 5373 /// \brief Code completion occurs within an expression. 5374 PCC_Expression, 5375 /// \brief Code completion occurs within a statement, which may 5376 /// also be an expression or a declaration. 5377 PCC_Statement, 5378 /// \brief Code completion occurs at the beginning of the 5379 /// initialization statement (or expression) in a for loop. 5380 PCC_ForInit, 5381 /// \brief Code completion occurs within the condition of an if, 5382 /// while, switch, or for statement. 5383 PCC_Condition, 5384 /// \brief Code completion occurs within the body of a function on a 5385 /// recovery path, where we do not have a specific handle on our position 5386 /// in the grammar. 5387 PCC_RecoveryInFunction, 5388 /// \brief Code completion occurs where only a type is permitted. 5389 PCC_Type, 5390 /// \brief Code completion occurs in a parenthesized expression, which 5391 /// might also be a type cast. 5392 PCC_ParenthesizedExpression, 5393 /// \brief Code completion occurs within a sequence of declaration 5394 /// specifiers within a function, method, or block. 5395 PCC_LocalDeclarationSpecifiers 5396 }; 5397 5398 void CodeCompleteOrdinaryName(Scope *S, 5399 ParserCompletionContext CompletionContext); 5400 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5401 bool AllowNonIdentifiers, 5402 bool AllowNestedNameSpecifiers); 5403 5404 struct CodeCompleteExpressionData; 5405 void CodeCompleteExpression(Scope *S, 5406 const CodeCompleteExpressionData &Data); 5407 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5408 SourceLocation OpLoc, 5409 bool IsArrow); 5410 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5411 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5412 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5413 void CodeCompleteCase(Scope *S); 5414 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5415 void CodeCompleteInitializer(Scope *S, Decl *D); 5416 void CodeCompleteReturn(Scope *S); 5417 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5418 5419 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5420 bool EnteringContext); 5421 void CodeCompleteUsing(Scope *S); 5422 void CodeCompleteUsingDirective(Scope *S); 5423 void CodeCompleteNamespaceDecl(Scope *S); 5424 void CodeCompleteNamespaceAliasDecl(Scope *S); 5425 void CodeCompleteOperatorName(Scope *S); 5426 void CodeCompleteConstructorInitializer(Decl *Constructor, 5427 CXXCtorInitializer** Initializers, 5428 unsigned NumInitializers); 5429 5430 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5431 bool InInterface); 5432 void CodeCompleteObjCAtVisibility(Scope *S); 5433 void CodeCompleteObjCAtStatement(Scope *S); 5434 void CodeCompleteObjCAtExpression(Scope *S); 5435 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5436 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5437 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5438 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5439 bool IsParameter); 5440 void CodeCompleteObjCMessageReceiver(Scope *S); 5441 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5442 IdentifierInfo **SelIdents, 5443 unsigned NumSelIdents, 5444 bool AtArgumentExpression); 5445 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5446 IdentifierInfo **SelIdents, 5447 unsigned NumSelIdents, 5448 bool AtArgumentExpression, 5449 bool IsSuper = false); 5450 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5451 IdentifierInfo **SelIdents, 5452 unsigned NumSelIdents, 5453 bool AtArgumentExpression, 5454 ObjCInterfaceDecl *Super = 0); 5455 void CodeCompleteObjCForCollection(Scope *S, 5456 DeclGroupPtrTy IterationVar); 5457 void CodeCompleteObjCSelector(Scope *S, 5458 IdentifierInfo **SelIdents, 5459 unsigned NumSelIdents); 5460 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5461 unsigned NumProtocols); 5462 void CodeCompleteObjCProtocolDecl(Scope *S); 5463 void CodeCompleteObjCInterfaceDecl(Scope *S); 5464 void CodeCompleteObjCSuperclass(Scope *S, 5465 IdentifierInfo *ClassName, 5466 SourceLocation ClassNameLoc); 5467 void CodeCompleteObjCImplementationDecl(Scope *S); 5468 void CodeCompleteObjCInterfaceCategory(Scope *S, 5469 IdentifierInfo *ClassName, 5470 SourceLocation ClassNameLoc); 5471 void CodeCompleteObjCImplementationCategory(Scope *S, 5472 IdentifierInfo *ClassName, 5473 SourceLocation ClassNameLoc); 5474 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5475 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5476 IdentifierInfo *PropertyName, 5477 Decl *ObjCImpDecl); 5478 void CodeCompleteObjCMethodDecl(Scope *S, 5479 bool IsInstanceMethod, 5480 ParsedType ReturnType, 5481 Decl *IDecl); 5482 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5483 bool IsInstanceMethod, 5484 bool AtParameterName, 5485 ParsedType ReturnType, 5486 IdentifierInfo **SelIdents, 5487 unsigned NumSelIdents); 5488 void CodeCompletePreprocessorDirective(bool InConditional); 5489 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5490 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5491 void CodeCompletePreprocessorExpression(); 5492 void CodeCompletePreprocessorMacroArgument(Scope *S, 5493 IdentifierInfo *Macro, 5494 MacroInfo *MacroInfo, 5495 unsigned Argument); 5496 void CodeCompleteNaturalLanguage(); 5497 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5498 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5499 //@} 5500 5501 void PrintStats() const {} 5502 5503 //===--------------------------------------------------------------------===// 5504 // Extra semantic analysis beyond the C type system 5505 5506public: 5507 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5508 unsigned ByteNo) const; 5509 5510private: 5511 void CheckArrayAccess(const Expr *E); 5512 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5513 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5514 5515 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5516 bool CheckObjCString(Expr *Arg); 5517 5518 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5519 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5520 5521 bool SemaBuiltinVAStart(CallExpr *TheCall); 5522 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5523 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5524 5525public: 5526 // Used by C++ template instantiation. 5527 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5528 5529private: 5530 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5531 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5532 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5533 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5534 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5535 llvm::APSInt &Result); 5536 5537 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5538 bool HasVAListArg, unsigned format_idx, 5539 unsigned firstDataArg, bool isPrintf); 5540 5541 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5542 const CallExpr *TheCall, bool HasVAListArg, 5543 unsigned format_idx, unsigned firstDataArg, 5544 bool isPrintf); 5545 5546 void CheckNonNullArguments(const NonNullAttr *NonNull, 5547 const Expr * const *ExprArgs, 5548 SourceLocation CallSiteLoc); 5549 5550 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5551 unsigned format_idx, unsigned firstDataArg, 5552 bool isPrintf); 5553 5554 void CheckMemsetArguments(const CallExpr *Call); 5555 5556 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5557 SourceLocation ReturnLoc); 5558 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5559 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5560 5561 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5562 Expr *Init); 5563 5564 /// \brief The parser's current scope. 5565 /// 5566 /// The parser maintains this state here. 5567 Scope *CurScope; 5568 5569protected: 5570 friend class Parser; 5571 friend class InitializationSequence; 5572 5573 /// \brief Retrieve the parser's current scope. 5574 Scope *getCurScope() const { return CurScope; } 5575}; 5576 5577/// \brief RAII object that enters a new expression evaluation context. 5578class EnterExpressionEvaluationContext { 5579 Sema &Actions; 5580 5581public: 5582 EnterExpressionEvaluationContext(Sema &Actions, 5583 Sema::ExpressionEvaluationContext NewContext) 5584 : Actions(Actions) { 5585 Actions.PushExpressionEvaluationContext(NewContext); 5586 } 5587 5588 ~EnterExpressionEvaluationContext() { 5589 Actions.PopExpressionEvaluationContext(); 5590 } 5591}; 5592 5593} // end namespace clang 5594 5595#endif 5596