Sema.h revision c1a0a73c1fad684dd23e9aade02c4e00dbaeaee6
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 ParenListExpr; 116 class ParmVarDecl; 117 class Preprocessor; 118 class PseudoDestructorTypeStorage; 119 class QualType; 120 class StandardConversionSequence; 121 class Stmt; 122 class StringLiteral; 123 class SwitchStmt; 124 class TargetAttributesSema; 125 class TemplateArgument; 126 class TemplateArgumentList; 127 class TemplateArgumentLoc; 128 class TemplateDecl; 129 class TemplateParameterList; 130 class TemplatePartialOrderingContext; 131 class TemplateTemplateParmDecl; 132 class Token; 133 class TypeAliasDecl; 134 class TypedefDecl; 135 class TypedefNameDecl; 136 class TypeLoc; 137 class UnqualifiedId; 138 class UnresolvedLookupExpr; 139 class UnresolvedMemberExpr; 140 class UnresolvedSetImpl; 141 class UnresolvedSetIterator; 142 class UsingDecl; 143 class UsingShadowDecl; 144 class ValueDecl; 145 class VarDecl; 146 class VisibilityAttr; 147 class VisibleDeclConsumer; 148 class IndirectFieldDecl; 149 150namespace sema { 151 class AccessedEntity; 152 class BlockScopeInfo; 153 class DelayedDiagnostic; 154 class FunctionScopeInfo; 155 class TemplateDeductionInfo; 156} 157 158/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 159/// parsing. 160/// 161/// LocInfoType is a "transient" type, only needed for passing to/from Parser 162/// and Sema, when we want to preserve type source info for a parsed type. 163/// It will not participate in the type system semantics in any way. 164class LocInfoType : public Type { 165 enum { 166 // The last number that can fit in Type's TC. 167 // Avoids conflict with an existing Type class. 168 LocInfo = Type::TypeLast + 1 169 }; 170 171 TypeSourceInfo *DeclInfo; 172 173 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 174 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 175 ty->isVariablyModifiedType(), 176 ty->containsUnexpandedParameterPack()), 177 DeclInfo(TInfo) { 178 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 179 } 180 friend class Sema; 181 182public: 183 QualType getType() const { return getCanonicalTypeInternal(); } 184 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 185 186 void getAsStringInternal(std::string &Str, 187 const PrintingPolicy &Policy) const; 188 189 static bool classof(const Type *T) { 190 return T->getTypeClass() == (TypeClass)LocInfo; 191 } 192 static bool classof(const LocInfoType *) { return true; } 193}; 194 195// FIXME: No way to easily map from TemplateTypeParmTypes to 196// TemplateTypeParmDecls, so we have this horrible PointerUnion. 197typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 198 SourceLocation> UnexpandedParameterPack; 199 200/// Sema - This implements semantic analysis and AST building for C. 201class Sema { 202 Sema(const Sema&); // DO NOT IMPLEMENT 203 void operator=(const Sema&); // DO NOT IMPLEMENT 204 mutable const TargetAttributesSema* TheTargetAttributesSema; 205public: 206 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 207 typedef OpaquePtr<TemplateName> TemplateTy; 208 typedef OpaquePtr<QualType> TypeTy; 209 typedef Attr AttrTy; 210 typedef CXXBaseSpecifier BaseTy; 211 typedef CXXCtorInitializer MemInitTy; 212 typedef Expr ExprTy; 213 typedef Stmt StmtTy; 214 typedef TemplateParameterList TemplateParamsTy; 215 typedef NestedNameSpecifier CXXScopeTy; 216 217 OpenCLOptions OpenCLFeatures; 218 FPOptions FPFeatures; 219 220 const LangOptions &LangOpts; 221 Preprocessor &PP; 222 ASTContext &Context; 223 ASTConsumer &Consumer; 224 Diagnostic &Diags; 225 SourceManager &SourceMgr; 226 227 /// \brief Source of additional semantic information. 228 ExternalSemaSource *ExternalSource; 229 230 /// \brief Code-completion consumer. 231 CodeCompleteConsumer *CodeCompleter; 232 233 /// CurContext - This is the current declaration context of parsing. 234 DeclContext *CurContext; 235 236 /// VAListTagName - The declaration name corresponding to __va_list_tag. 237 /// This is used as part of a hack to omit that class from ADL results. 238 DeclarationName VAListTagName; 239 240 /// PackContext - Manages the stack for #pragma pack. An alignment 241 /// of 0 indicates default alignment. 242 void *PackContext; // Really a "PragmaPackStack*" 243 244 bool MSStructPragmaOn; // True when #pragma ms_struct on 245 246 /// VisContext - Manages the stack for #pragma GCC visibility. 247 void *VisContext; // Really a "PragmaVisStack*" 248 249 /// \brief Stack containing information about each of the nested 250 /// function, block, and method scopes that are currently active. 251 /// 252 /// This array is never empty. Clients should ignore the first 253 /// element, which is used to cache a single FunctionScopeInfo 254 /// that's used to parse every top-level function. 255 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 256 257 /// ExprTemporaries - This is the stack of temporaries that are created by 258 /// the current full expression. 259 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 260 261 /// ExtVectorDecls - This is a list all the extended vector types. This allows 262 /// us to associate a raw vector type with one of the ext_vector type names. 263 /// This is only necessary for issuing pretty diagnostics. 264 llvm::SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 265 266 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 267 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 268 269 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 270 271 /// PureVirtualClassDiagSet - a set of class declarations which we have 272 /// emitted a list of pure virtual functions. Used to prevent emitting the 273 /// same list more than once. 274 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 275 276 /// ParsingInitForAutoVars - a set of declarations with auto types for which 277 /// we are currently parsing the initializer. 278 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 279 280 /// \brief A mapping from external names to the most recent 281 /// locally-scoped external declaration with that name. 282 /// 283 /// This map contains external declarations introduced in local 284 /// scoped, e.g., 285 /// 286 /// \code 287 /// void f() { 288 /// void foo(int, int); 289 /// } 290 /// \endcode 291 /// 292 /// Here, the name "foo" will be associated with the declaration on 293 /// "foo" within f. This name is not visible outside of 294 /// "f". However, we still find it in two cases: 295 /// 296 /// - If we are declaring another external with the name "foo", we 297 /// can find "foo" as a previous declaration, so that the types 298 /// of this external declaration can be checked for 299 /// compatibility. 300 /// 301 /// - If we would implicitly declare "foo" (e.g., due to a call to 302 /// "foo" in C when no prototype or definition is visible), then 303 /// we find this declaration of "foo" and complain that it is 304 /// not visible. 305 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 306 307 /// \brief All the tentative definitions encountered in the TU. 308 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 309 310 /// \brief The set of file scoped decls seen so far that have not been used 311 /// and must warn if not used. Only contains the first declaration. 312 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 313 314 /// \brief Callback to the parser to parse templated functions when needed. 315 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 316 LateTemplateParserCB *LateTemplateParser; 317 void *OpaqueParser; 318 319 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 320 LateTemplateParser = LTP; 321 OpaqueParser = P; 322 } 323 324 class DelayedDiagnostics; 325 326 class ParsingDeclState { 327 unsigned SavedStackSize; 328 friend class Sema::DelayedDiagnostics; 329 }; 330 331 class ProcessingContextState { 332 unsigned SavedParsingDepth; 333 unsigned SavedActiveStackBase; 334 friend class Sema::DelayedDiagnostics; 335 }; 336 337 /// A class which encapsulates the logic for delaying diagnostics 338 /// during parsing and other processing. 339 class DelayedDiagnostics { 340 /// \brief The stack of diagnostics that were delayed due to being 341 /// produced during the parsing of a declaration. 342 sema::DelayedDiagnostic *Stack; 343 344 /// \brief The number of objects on the delayed-diagnostics stack. 345 unsigned StackSize; 346 347 /// \brief The current capacity of the delayed-diagnostics stack. 348 unsigned StackCapacity; 349 350 /// \brief The index of the first "active" delayed diagnostic in 351 /// the stack. When parsing class definitions, we ignore active 352 /// delayed diagnostics from the surrounding context. 353 unsigned ActiveStackBase; 354 355 /// \brief The depth of the declarations we're currently parsing. 356 /// This gets saved and reset whenever we enter a class definition. 357 unsigned ParsingDepth; 358 359 public: 360 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 361 ActiveStackBase(0), ParsingDepth(0) {} 362 363 ~DelayedDiagnostics() { 364 delete[] reinterpret_cast<char*>(Stack); 365 } 366 367 /// Adds a delayed diagnostic. 368 void add(const sema::DelayedDiagnostic &diag); 369 370 /// Determines whether diagnostics should be delayed. 371 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 372 373 /// Observe that we've started parsing a declaration. Access and 374 /// deprecation diagnostics will be delayed; when the declaration 375 /// is completed, all active delayed diagnostics will be evaluated 376 /// in its context, and then active diagnostics stack will be 377 /// popped down to the saved depth. 378 ParsingDeclState pushParsingDecl() { 379 ParsingDepth++; 380 381 ParsingDeclState state; 382 state.SavedStackSize = StackSize; 383 return state; 384 } 385 386 /// Observe that we're completed parsing a declaration. 387 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 388 389 /// Observe that we've started processing a different context, the 390 /// contents of which are semantically separate from the 391 /// declarations it may lexically appear in. This sets aside the 392 /// current stack of active diagnostics and starts afresh. 393 ProcessingContextState pushContext() { 394 assert(StackSize >= ActiveStackBase); 395 396 ProcessingContextState state; 397 state.SavedParsingDepth = ParsingDepth; 398 state.SavedActiveStackBase = ActiveStackBase; 399 400 ActiveStackBase = StackSize; 401 ParsingDepth = 0; 402 403 return state; 404 } 405 406 /// Observe that we've stopped processing a context. This 407 /// restores the previous stack of active diagnostics. 408 void popContext(ProcessingContextState state) { 409 assert(ActiveStackBase == StackSize); 410 assert(ParsingDepth == 0); 411 ActiveStackBase = state.SavedActiveStackBase; 412 ParsingDepth = state.SavedParsingDepth; 413 } 414 } DelayedDiagnostics; 415 416 /// A RAII object to temporarily push a declaration context. 417 class ContextRAII { 418 private: 419 Sema &S; 420 DeclContext *SavedContext; 421 ProcessingContextState SavedContextState; 422 423 public: 424 ContextRAII(Sema &S, DeclContext *ContextToPush) 425 : S(S), SavedContext(S.CurContext), 426 SavedContextState(S.DelayedDiagnostics.pushContext()) 427 { 428 assert(ContextToPush && "pushing null context"); 429 S.CurContext = ContextToPush; 430 } 431 432 void pop() { 433 if (!SavedContext) return; 434 S.CurContext = SavedContext; 435 S.DelayedDiagnostics.popContext(SavedContextState); 436 SavedContext = 0; 437 } 438 439 ~ContextRAII() { 440 pop(); 441 } 442 }; 443 444 /// WeakUndeclaredIdentifiers - Identifiers contained in 445 /// #pragma weak before declared. rare. may alias another 446 /// identifier, declared or undeclared 447 class WeakInfo { 448 IdentifierInfo *alias; // alias (optional) 449 SourceLocation loc; // for diagnostics 450 bool used; // identifier later declared? 451 public: 452 WeakInfo() 453 : alias(0), loc(SourceLocation()), used(false) {} 454 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 455 : alias(Alias), loc(Loc), used(false) {} 456 inline IdentifierInfo * getAlias() const { return alias; } 457 inline SourceLocation getLocation() const { return loc; } 458 void setUsed(bool Used=true) { used = Used; } 459 inline bool getUsed() { return used; } 460 bool operator==(WeakInfo RHS) const { 461 return alias == RHS.getAlias() && loc == RHS.getLocation(); 462 } 463 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 464 }; 465 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 466 467 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 468 /// #pragma weak during processing of other Decls. 469 /// I couldn't figure out a clean way to generate these in-line, so 470 /// we store them here and handle separately -- which is a hack. 471 /// It would be best to refactor this. 472 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 473 474 IdentifierResolver IdResolver; 475 476 /// Translation Unit Scope - useful to Objective-C actions that need 477 /// to lookup file scope declarations in the "ordinary" C decl namespace. 478 /// For example, user-defined classes, built-in "id" type, etc. 479 Scope *TUScope; 480 481 /// \brief The C++ "std" namespace, where the standard library resides. 482 LazyDeclPtr StdNamespace; 483 484 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 485 /// standard library. 486 LazyDeclPtr StdBadAlloc; 487 488 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 489 RecordDecl *CXXTypeInfoDecl; 490 491 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 492 RecordDecl *MSVCGuidDecl; 493 494 /// A flag to remember whether the implicit forms of operator new and delete 495 /// have been declared. 496 bool GlobalNewDeleteDeclared; 497 498 /// \brief The set of declarations that have been referenced within 499 /// a potentially evaluated expression. 500 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 501 PotentiallyReferencedDecls; 502 503 /// \brief A set of diagnostics that may be emitted. 504 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 505 PotentiallyEmittedDiagnostics; 506 507 /// \brief Describes how the expressions currently being parsed are 508 /// evaluated at run-time, if at all. 509 enum ExpressionEvaluationContext { 510 /// \brief The current expression and its subexpressions occur within an 511 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 512 /// or the subexpression of \c sizeof, where the type or the value of the 513 /// expression may be significant but no code will be generated to evaluate 514 /// the value of the expression at run time. 515 Unevaluated, 516 517 /// \brief The current expression is potentially evaluated at run time, 518 /// which means that code may be generated to evaluate the value of the 519 /// expression at run time. 520 PotentiallyEvaluated, 521 522 /// \brief The current expression may be potentially evaluated or it may 523 /// be unevaluated, but it is impossible to tell from the lexical context. 524 /// This evaluation context is used primary for the operand of the C++ 525 /// \c typeid expression, whose argument is potentially evaluated only when 526 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 527 PotentiallyPotentiallyEvaluated, 528 529 /// \brief The current expression is potentially evaluated, but any 530 /// declarations referenced inside that expression are only used if 531 /// in fact the current expression is used. 532 /// 533 /// This value is used when parsing default function arguments, for which 534 /// we would like to provide diagnostics (e.g., passing non-POD arguments 535 /// through varargs) but do not want to mark declarations as "referenced" 536 /// until the default argument is used. 537 PotentiallyEvaluatedIfUsed 538 }; 539 540 /// \brief Data structure used to record current or nested 541 /// expression evaluation contexts. 542 struct ExpressionEvaluationContextRecord { 543 /// \brief The expression evaluation context. 544 ExpressionEvaluationContext Context; 545 546 /// \brief The number of temporaries that were active when we 547 /// entered this expression evaluation context. 548 unsigned NumTemporaries; 549 550 /// \brief The set of declarations referenced within a 551 /// potentially potentially-evaluated context. 552 /// 553 /// When leaving a potentially potentially-evaluated context, each 554 /// of these elements will be as referenced if the corresponding 555 /// potentially potentially evaluated expression is potentially 556 /// evaluated. 557 PotentiallyReferencedDecls *PotentiallyReferenced; 558 559 /// \brief The set of diagnostics to emit should this potentially 560 /// potentially-evaluated context become evaluated. 561 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 562 563 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 564 unsigned NumTemporaries) 565 : Context(Context), NumTemporaries(NumTemporaries), 566 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 567 568 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 569 if (!PotentiallyReferenced) 570 PotentiallyReferenced = new PotentiallyReferencedDecls; 571 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 572 } 573 574 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 575 if (!PotentiallyDiagnosed) 576 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 577 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 578 } 579 580 void Destroy() { 581 delete PotentiallyReferenced; 582 delete PotentiallyDiagnosed; 583 PotentiallyReferenced = 0; 584 PotentiallyDiagnosed = 0; 585 } 586 }; 587 588 /// A stack of expression evaluation contexts. 589 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 590 591 /// \brief Whether the code handled by Sema should be considered a 592 /// complete translation unit or not. 593 /// 594 /// When true (which is generally the case), Sema will perform 595 /// end-of-translation-unit semantic tasks (such as creating 596 /// initializers for tentative definitions in C) once parsing has 597 /// completed. This flag will be false when building PCH files, 598 /// since a PCH file is by definition not a complete translation 599 /// unit. 600 bool CompleteTranslationUnit; 601 602 llvm::BumpPtrAllocator BumpAlloc; 603 604 /// \brief The number of SFINAE diagnostics that have been trapped. 605 unsigned NumSFINAEErrors; 606 607 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 608 UnparsedDefaultArgInstantiationsMap; 609 610 /// \brief A mapping from parameters with unparsed default arguments to the 611 /// set of instantiations of each parameter. 612 /// 613 /// This mapping is a temporary data structure used when parsing 614 /// nested class templates or nested classes of class templates, 615 /// where we might end up instantiating an inner class before the 616 /// default arguments of its methods have been parsed. 617 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 618 619 // Contains the locations of the beginning of unparsed default 620 // argument locations. 621 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 622 623 /// UndefinedInternals - all the used, undefined objects with 624 /// internal linkage in this translation unit. 625 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 626 627 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 628 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 629 630 /// Method Pool - allows efficient lookup when typechecking messages to "id". 631 /// We need to maintain a list, since selectors can have differing signatures 632 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 633 /// of selectors are "overloaded"). 634 GlobalMethodPool MethodPool; 635 636 /// Method selectors used in a @selector expression. Used for implementation 637 /// of -Wselector. 638 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 639 640 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 641 642 /// Private Helper predicate to check for 'self'. 643 bool isSelfExpr(Expr *RExpr); 644public: 645 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 646 bool CompleteTranslationUnit = true, 647 CodeCompleteConsumer *CompletionConsumer = 0); 648 ~Sema(); 649 650 /// \brief Perform initialization that occurs after the parser has been 651 /// initialized but before it parses anything. 652 void Initialize(); 653 654 const LangOptions &getLangOptions() const { return LangOpts; } 655 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 656 FPOptions &getFPOptions() { return FPFeatures; } 657 658 Diagnostic &getDiagnostics() const { return Diags; } 659 SourceManager &getSourceManager() const { return SourceMgr; } 660 const TargetAttributesSema &getTargetAttributesSema() const; 661 Preprocessor &getPreprocessor() const { return PP; } 662 ASTContext &getASTContext() const { return Context; } 663 ASTConsumer &getASTConsumer() const { return Consumer; } 664 ASTMutationListener *getASTMutationListener() const; 665 666 /// \brief Helper class that creates diagnostics with optional 667 /// template instantiation stacks. 668 /// 669 /// This class provides a wrapper around the basic DiagnosticBuilder 670 /// class that emits diagnostics. SemaDiagnosticBuilder is 671 /// responsible for emitting the diagnostic (as DiagnosticBuilder 672 /// does) and, if the diagnostic comes from inside a template 673 /// instantiation, printing the template instantiation stack as 674 /// well. 675 class SemaDiagnosticBuilder : public DiagnosticBuilder { 676 Sema &SemaRef; 677 unsigned DiagID; 678 679 public: 680 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 681 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 682 683 explicit SemaDiagnosticBuilder(Sema &SemaRef) 684 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 685 686 ~SemaDiagnosticBuilder(); 687 }; 688 689 /// \brief Emit a diagnostic. 690 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 691 692 /// \brief Emit a partial diagnostic. 693 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 694 695 /// \brief Build a partial diagnostic. 696 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 697 698 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 699 700 ExprResult Owned(Expr* E) { return E; } 701 ExprResult Owned(ExprResult R) { return R; } 702 StmtResult Owned(Stmt* S) { return S; } 703 704 void ActOnEndOfTranslationUnit(); 705 706 Scope *getScopeForContext(DeclContext *Ctx); 707 708 void PushFunctionScope(); 709 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 710 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 711 const Decl *D = 0, const BlockExpr *blkExpr = 0); 712 713 sema::FunctionScopeInfo *getCurFunction() const { 714 return FunctionScopes.back(); 715 } 716 717 bool hasAnyErrorsInThisFunction() const; 718 719 /// \brief Retrieve the current block, if any. 720 sema::BlockScopeInfo *getCurBlock(); 721 722 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 723 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 724 725 //===--------------------------------------------------------------------===// 726 // Type Analysis / Processing: SemaType.cpp. 727 // 728 729 QualType adjustParameterType(QualType T); 730 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 731 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 732 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 733 } 734 QualType BuildPointerType(QualType T, 735 SourceLocation Loc, DeclarationName Entity); 736 QualType BuildReferenceType(QualType T, bool LValueRef, 737 SourceLocation Loc, DeclarationName Entity); 738 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 739 Expr *ArraySize, unsigned Quals, 740 SourceRange Brackets, DeclarationName Entity); 741 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 742 SourceLocation AttrLoc); 743 QualType BuildFunctionType(QualType T, 744 QualType *ParamTypes, unsigned NumParamTypes, 745 bool Variadic, unsigned Quals, 746 RefQualifierKind RefQualifier, 747 SourceLocation Loc, DeclarationName Entity, 748 FunctionType::ExtInfo Info); 749 QualType BuildMemberPointerType(QualType T, QualType Class, 750 SourceLocation Loc, 751 DeclarationName Entity); 752 QualType BuildBlockPointerType(QualType T, 753 SourceLocation Loc, DeclarationName Entity); 754 QualType BuildParenType(QualType T); 755 756 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 757 TagDecl **OwnedDecl = 0, 758 bool AllowAutoInTypeName = false); 759 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 760 TypeSourceInfo *ReturnTypeInfo); 761 /// \brief Package the given type and TSI into a ParsedType. 762 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 763 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 764 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 765 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 766 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 767 bool CheckDistantExceptionSpec(QualType T); 768 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 769 bool CheckEquivalentExceptionSpec( 770 const FunctionProtoType *Old, SourceLocation OldLoc, 771 const FunctionProtoType *New, SourceLocation NewLoc); 772 bool CheckEquivalentExceptionSpec( 773 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 774 const FunctionProtoType *Old, SourceLocation OldLoc, 775 const FunctionProtoType *New, SourceLocation NewLoc, 776 bool *MissingExceptionSpecification = 0, 777 bool *MissingEmptyExceptionSpecification = 0, 778 bool AllowNoexceptAllMatchWithNoSpec = false, 779 bool IsOperatorNew = false); 780 bool CheckExceptionSpecSubset( 781 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 782 const FunctionProtoType *Superset, SourceLocation SuperLoc, 783 const FunctionProtoType *Subset, SourceLocation SubLoc); 784 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 785 const FunctionProtoType *Target, SourceLocation TargetLoc, 786 const FunctionProtoType *Source, SourceLocation SourceLoc); 787 788 TypeResult ActOnTypeName(Scope *S, Declarator &D); 789 790 bool RequireCompleteType(SourceLocation Loc, QualType T, 791 const PartialDiagnostic &PD, 792 std::pair<SourceLocation, PartialDiagnostic> Note); 793 bool RequireCompleteType(SourceLocation Loc, QualType T, 794 const PartialDiagnostic &PD); 795 bool RequireCompleteType(SourceLocation Loc, QualType T, 796 unsigned DiagID); 797 798 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 799 const CXXScopeSpec &SS, QualType T); 800 801 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 802 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 803 804 //===--------------------------------------------------------------------===// 805 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 806 // 807 808 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 809 810 void DiagnoseUseOfUnimplementedSelectors(); 811 812 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 813 Scope *S, CXXScopeSpec *SS = 0, 814 bool isClassName = false, 815 bool HasTrailingDot = false, 816 ParsedType ObjectType = ParsedType(), 817 bool WantNontrivialTypeSourceInfo = false); 818 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 819 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 820 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 821 SourceLocation IILoc, 822 Scope *S, 823 CXXScopeSpec *SS, 824 ParsedType &SuggestedType); 825 826 /// \brief Describes the result of the name lookup and resolution performed 827 /// by \c ClassifyName(). 828 enum NameClassificationKind { 829 NC_Unknown, 830 NC_Error, 831 NC_Keyword, 832 NC_Type, 833 NC_Expression, 834 NC_NestedNameSpecifier, 835 NC_TypeTemplate, 836 NC_FunctionTemplate 837 }; 838 839 class NameClassification { 840 NameClassificationKind Kind; 841 ExprResult Expr; 842 TemplateName Template; 843 ParsedType Type; 844 const IdentifierInfo *Keyword; 845 846 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 847 848 public: 849 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 850 851 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 852 853 NameClassification(const IdentifierInfo *Keyword) 854 : Kind(NC_Keyword), Keyword(Keyword) { } 855 856 static NameClassification Error() { 857 return NameClassification(NC_Error); 858 } 859 860 static NameClassification Unknown() { 861 return NameClassification(NC_Unknown); 862 } 863 864 static NameClassification NestedNameSpecifier() { 865 return NameClassification(NC_NestedNameSpecifier); 866 } 867 868 static NameClassification TypeTemplate(TemplateName Name) { 869 NameClassification Result(NC_TypeTemplate); 870 Result.Template = Name; 871 return Result; 872 } 873 874 static NameClassification FunctionTemplate(TemplateName Name) { 875 NameClassification Result(NC_FunctionTemplate); 876 Result.Template = Name; 877 return Result; 878 } 879 880 NameClassificationKind getKind() const { return Kind; } 881 882 ParsedType getType() const { 883 assert(Kind == NC_Type); 884 return Type; 885 } 886 887 ExprResult getExpression() const { 888 assert(Kind == NC_Expression); 889 return Expr; 890 } 891 892 TemplateName getTemplateName() const { 893 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 894 return Template; 895 } 896 897 TemplateNameKind getTemplateNameKind() const { 898 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 899 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 900 } 901}; 902 903 /// \brief Perform name lookup on the given name, classifying it based on 904 /// the results of name lookup and the following token. 905 /// 906 /// This routine is used by the parser to resolve identifiers and help direct 907 /// parsing. When the identifier cannot be found, this routine will attempt 908 /// to correct the typo and classify based on the resulting name. 909 /// 910 /// \param S The scope in which we're performing name lookup. 911 /// 912 /// \param SS The nested-name-specifier that precedes the name. 913 /// 914 /// \param Name The identifier. If typo correction finds an alternative name, 915 /// this pointer parameter will be updated accordingly. 916 /// 917 /// \param NameLoc The location of the identifier. 918 /// 919 /// \param NextToken The token following the identifier. Used to help 920 /// disambiguate the name. 921 NameClassification ClassifyName(Scope *S, 922 CXXScopeSpec &SS, 923 IdentifierInfo *&Name, 924 SourceLocation NameLoc, 925 const Token &NextToken); 926 927 Decl *ActOnDeclarator(Scope *S, Declarator &D); 928 929 Decl *HandleDeclarator(Scope *S, Declarator &D, 930 MultiTemplateParamsArg TemplateParameterLists, 931 bool IsFunctionDefinition); 932 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 933 const LookupResult &Previous, 934 Scope *S); 935 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 936 void DiagnoseFunctionSpecifiers(Declarator& D); 937 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 938 void CheckShadow(Scope *S, VarDecl *D); 939 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 940 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 941 QualType R, TypeSourceInfo *TInfo, 942 LookupResult &Previous, bool &Redeclaration); 943 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 944 LookupResult &Previous, bool &Redeclaration); 945 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 946 QualType R, TypeSourceInfo *TInfo, 947 LookupResult &Previous, 948 MultiTemplateParamsArg TemplateParamLists, 949 bool &Redeclaration); 950 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 951 bool &Redeclaration); 952 void CheckCompleteVariableDeclaration(VarDecl *var); 953 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 954 QualType R, TypeSourceInfo *TInfo, 955 LookupResult &Previous, 956 MultiTemplateParamsArg TemplateParamLists, 957 bool IsFunctionDefinition, 958 bool &Redeclaration); 959 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 960 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 961 void CheckFunctionDeclaration(Scope *S, 962 FunctionDecl *NewFD, LookupResult &Previous, 963 bool IsExplicitSpecialization, 964 bool &Redeclaration); 965 void CheckMain(FunctionDecl *FD); 966 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 967 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 968 SourceLocation Loc, 969 QualType T); 970 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 971 SourceLocation NameLoc, IdentifierInfo *Name, 972 QualType T, TypeSourceInfo *TSInfo, 973 StorageClass SC, StorageClass SCAsWritten); 974 void ActOnParamDefaultArgument(Decl *param, 975 SourceLocation EqualLoc, 976 Expr *defarg); 977 void ActOnParamUnparsedDefaultArgument(Decl *param, 978 SourceLocation EqualLoc, 979 SourceLocation ArgLoc); 980 void ActOnParamDefaultArgumentError(Decl *param); 981 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 982 SourceLocation EqualLoc); 983 984 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 985 bool TypeMayContainAuto); 986 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 987 void ActOnInitializerError(Decl *Dcl); 988 void ActOnCXXForRangeDecl(Decl *D); 989 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 990 void FinalizeDeclaration(Decl *D); 991 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 992 Decl **Group, 993 unsigned NumDecls); 994 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 995 bool TypeMayContainAuto = true); 996 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 997 SourceLocation LocAfterDecls); 998 void CheckForFunctionRedefinition(FunctionDecl *FD); 999 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1000 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1001 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1002 1003 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1004 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1005 1006 /// \brief Diagnose any unused parameters in the given sequence of 1007 /// ParmVarDecl pointers. 1008 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1009 ParmVarDecl * const *End); 1010 1011 /// \brief Diagnose whether the size of parameters or return value of a 1012 /// function or obj-c method definition is pass-by-value and larger than a 1013 /// specified threshold. 1014 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1015 ParmVarDecl * const *End, 1016 QualType ReturnTy, 1017 NamedDecl *D); 1018 1019 void DiagnoseInvalidJumps(Stmt *Body); 1020 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1021 SourceLocation AsmLoc, 1022 SourceLocation RParenLoc); 1023 1024 /// Scope actions. 1025 void ActOnPopScope(SourceLocation Loc, Scope *S); 1026 void ActOnTranslationUnitScope(Scope *S); 1027 1028 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 1029 /// no declarator (e.g. "struct foo;") is parsed. 1030 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1031 DeclSpec &DS); 1032 1033 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1034 1035 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1036 AccessSpecifier AS, 1037 RecordDecl *Record); 1038 1039 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1040 RecordDecl *Record); 1041 1042 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1043 TagTypeKind NewTag, 1044 SourceLocation NewTagLoc, 1045 const IdentifierInfo &Name); 1046 1047 enum TagUseKind { 1048 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1049 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1050 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1051 TUK_Friend // Friend declaration: 'friend struct foo;' 1052 }; 1053 1054 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1055 SourceLocation KWLoc, CXXScopeSpec &SS, 1056 IdentifierInfo *Name, SourceLocation NameLoc, 1057 AttributeList *Attr, AccessSpecifier AS, 1058 MultiTemplateParamsArg TemplateParameterLists, 1059 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1060 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1061 1062 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1063 unsigned TagSpec, SourceLocation TagLoc, 1064 CXXScopeSpec &SS, 1065 IdentifierInfo *Name, SourceLocation NameLoc, 1066 AttributeList *Attr, 1067 MultiTemplateParamsArg TempParamLists); 1068 1069 TypeResult ActOnDependentTag(Scope *S, 1070 unsigned TagSpec, 1071 TagUseKind TUK, 1072 const CXXScopeSpec &SS, 1073 IdentifierInfo *Name, 1074 SourceLocation TagLoc, 1075 SourceLocation NameLoc); 1076 1077 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1078 IdentifierInfo *ClassName, 1079 llvm::SmallVectorImpl<Decl *> &Decls); 1080 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1081 Declarator &D, Expr *BitfieldWidth); 1082 1083 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1084 Declarator &D, Expr *BitfieldWidth, 1085 AccessSpecifier AS); 1086 1087 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1088 TypeSourceInfo *TInfo, 1089 RecordDecl *Record, SourceLocation Loc, 1090 bool Mutable, Expr *BitfieldWidth, 1091 SourceLocation TSSL, 1092 AccessSpecifier AS, NamedDecl *PrevDecl, 1093 Declarator *D = 0); 1094 1095 enum CXXSpecialMember { 1096 CXXInvalid = -1, 1097 CXXConstructor = 0, 1098 CXXCopyConstructor = 1, 1099 CXXCopyAssignment = 2, 1100 CXXDestructor = 3 1101 }; 1102 bool CheckNontrivialField(FieldDecl *FD); 1103 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1104 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1105 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1106 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 1107 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1108 Declarator &D, Expr *BitfieldWidth, 1109 tok::ObjCKeywordKind visibility); 1110 1111 // This is used for both record definitions and ObjC interface declarations. 1112 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1113 Decl **Fields, unsigned NumFields, 1114 SourceLocation LBrac, SourceLocation RBrac, 1115 AttributeList *AttrList); 1116 1117 /// ActOnTagStartDefinition - Invoked when we have entered the 1118 /// scope of a tag's definition (e.g., for an enumeration, class, 1119 /// struct, or union). 1120 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1121 1122 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1123 /// C++ record definition's base-specifiers clause and are starting its 1124 /// member declarations. 1125 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1126 SourceLocation FinalLoc, 1127 SourceLocation LBraceLoc); 1128 1129 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1130 /// the definition of a tag (enumeration, class, struct, or union). 1131 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1132 SourceLocation RBraceLoc); 1133 1134 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1135 /// error parsing the definition of a tag. 1136 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1137 1138 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1139 EnumConstantDecl *LastEnumConst, 1140 SourceLocation IdLoc, 1141 IdentifierInfo *Id, 1142 Expr *val); 1143 1144 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1145 SourceLocation IdLoc, IdentifierInfo *Id, 1146 AttributeList *Attrs, 1147 SourceLocation EqualLoc, Expr *Val); 1148 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1149 SourceLocation RBraceLoc, Decl *EnumDecl, 1150 Decl **Elements, unsigned NumElements, 1151 Scope *S, AttributeList *Attr); 1152 1153 DeclContext *getContainingDC(DeclContext *DC); 1154 1155 /// Set the current declaration context until it gets popped. 1156 void PushDeclContext(Scope *S, DeclContext *DC); 1157 void PopDeclContext(); 1158 1159 /// EnterDeclaratorContext - Used when we must lookup names in the context 1160 /// of a declarator's nested name specifier. 1161 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1162 void ExitDeclaratorContext(Scope *S); 1163 1164 DeclContext *getFunctionLevelDeclContext(); 1165 1166 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1167 /// to the function decl for the function being parsed. If we're currently 1168 /// in a 'block', this returns the containing context. 1169 FunctionDecl *getCurFunctionDecl(); 1170 1171 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1172 /// the method decl for the method being parsed. If we're currently 1173 /// in a 'block', this returns the containing context. 1174 ObjCMethodDecl *getCurMethodDecl(); 1175 1176 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1177 /// or C function we're in, otherwise return null. If we're currently 1178 /// in a 'block', this returns the containing context. 1179 NamedDecl *getCurFunctionOrMethodDecl(); 1180 1181 /// Add this decl to the scope shadowed decl chains. 1182 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1183 1184 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1185 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1186 /// true if 'D' belongs to the given declaration context. 1187 /// 1188 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1189 /// whether the declaration is in scope for the purposes of explicit template 1190 /// instantiation or specialization. The default is false. 1191 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1192 bool ExplicitInstantiationOrSpecialization = false); 1193 1194 /// Finds the scope corresponding to the given decl context, if it 1195 /// happens to be an enclosing scope. Otherwise return NULL. 1196 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1197 1198 /// Subroutines of ActOnDeclarator(). 1199 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1200 TypeSourceInfo *TInfo); 1201 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1202 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1203 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1204 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1205 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1206 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1207 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1208 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1209 1210 // AssignmentAction - This is used by all the assignment diagnostic functions 1211 // to represent what is actually causing the operation 1212 enum AssignmentAction { 1213 AA_Assigning, 1214 AA_Passing, 1215 AA_Returning, 1216 AA_Converting, 1217 AA_Initializing, 1218 AA_Sending, 1219 AA_Casting 1220 }; 1221 1222 /// C++ Overloading. 1223 enum OverloadKind { 1224 /// This is a legitimate overload: the existing declarations are 1225 /// functions or function templates with different signatures. 1226 Ovl_Overload, 1227 1228 /// This is not an overload because the signature exactly matches 1229 /// an existing declaration. 1230 Ovl_Match, 1231 1232 /// This is not an overload because the lookup results contain a 1233 /// non-function. 1234 Ovl_NonFunction 1235 }; 1236 OverloadKind CheckOverload(Scope *S, 1237 FunctionDecl *New, 1238 const LookupResult &OldDecls, 1239 NamedDecl *&OldDecl, 1240 bool IsForUsingDecl); 1241 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1242 1243 bool TryImplicitConversion(InitializationSequence &Sequence, 1244 const InitializedEntity &Entity, 1245 Expr *From, 1246 bool SuppressUserConversions, 1247 bool AllowExplicit, 1248 bool InOverloadResolution, 1249 bool CStyle); 1250 1251 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1252 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1253 bool IsComplexPromotion(QualType FromType, QualType ToType); 1254 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1255 bool InOverloadResolution, 1256 QualType& ConvertedType, bool &IncompatibleObjC); 1257 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1258 QualType& ConvertedType, bool &IncompatibleObjC); 1259 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1260 QualType& ConvertedType); 1261 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1262 const FunctionProtoType *NewType); 1263 1264 bool CheckPointerConversion(Expr *From, QualType ToType, 1265 CastKind &Kind, 1266 CXXCastPath& BasePath, 1267 bool IgnoreBaseAccess); 1268 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1269 bool InOverloadResolution, 1270 QualType &ConvertedType); 1271 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1272 CastKind &Kind, 1273 CXXCastPath &BasePath, 1274 bool IgnoreBaseAccess); 1275 bool IsQualificationConversion(QualType FromType, QualType ToType, 1276 bool CStyle); 1277 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1278 1279 1280 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1281 const VarDecl *NRVOCandidate, 1282 QualType ResultType, 1283 Expr *Value); 1284 1285 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1286 SourceLocation EqualLoc, 1287 ExprResult Init); 1288 ExprResult PerformObjectArgumentInitialization(Expr *From, 1289 NestedNameSpecifier *Qualifier, 1290 NamedDecl *FoundDecl, 1291 CXXMethodDecl *Method); 1292 1293 ExprResult PerformContextuallyConvertToBool(Expr *From); 1294 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1295 1296 ExprResult 1297 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1298 const PartialDiagnostic &NotIntDiag, 1299 const PartialDiagnostic &IncompleteDiag, 1300 const PartialDiagnostic &ExplicitConvDiag, 1301 const PartialDiagnostic &ExplicitConvNote, 1302 const PartialDiagnostic &AmbigDiag, 1303 const PartialDiagnostic &AmbigNote, 1304 const PartialDiagnostic &ConvDiag); 1305 1306 ExprResult PerformObjectMemberConversion(Expr *From, 1307 NestedNameSpecifier *Qualifier, 1308 NamedDecl *FoundDecl, 1309 NamedDecl *Member); 1310 1311 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1312 // TODO: make this is a typesafe union. 1313 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1314 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1315 1316 void AddOverloadCandidate(NamedDecl *Function, 1317 DeclAccessPair FoundDecl, 1318 Expr **Args, unsigned NumArgs, 1319 OverloadCandidateSet &CandidateSet); 1320 1321 void AddOverloadCandidate(FunctionDecl *Function, 1322 DeclAccessPair FoundDecl, 1323 Expr **Args, unsigned NumArgs, 1324 OverloadCandidateSet& CandidateSet, 1325 bool SuppressUserConversions = false, 1326 bool PartialOverloading = false); 1327 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1328 Expr **Args, unsigned NumArgs, 1329 OverloadCandidateSet& CandidateSet, 1330 bool SuppressUserConversions = false); 1331 void AddMethodCandidate(DeclAccessPair FoundDecl, 1332 QualType ObjectType, 1333 Expr::Classification ObjectClassification, 1334 Expr **Args, unsigned NumArgs, 1335 OverloadCandidateSet& CandidateSet, 1336 bool SuppressUserConversion = false); 1337 void AddMethodCandidate(CXXMethodDecl *Method, 1338 DeclAccessPair FoundDecl, 1339 CXXRecordDecl *ActingContext, QualType ObjectType, 1340 Expr::Classification ObjectClassification, 1341 Expr **Args, unsigned NumArgs, 1342 OverloadCandidateSet& CandidateSet, 1343 bool SuppressUserConversions = false); 1344 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1345 DeclAccessPair FoundDecl, 1346 CXXRecordDecl *ActingContext, 1347 TemplateArgumentListInfo *ExplicitTemplateArgs, 1348 QualType ObjectType, 1349 Expr::Classification ObjectClassification, 1350 Expr **Args, unsigned NumArgs, 1351 OverloadCandidateSet& CandidateSet, 1352 bool SuppressUserConversions = false); 1353 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1354 DeclAccessPair FoundDecl, 1355 TemplateArgumentListInfo *ExplicitTemplateArgs, 1356 Expr **Args, unsigned NumArgs, 1357 OverloadCandidateSet& CandidateSet, 1358 bool SuppressUserConversions = false); 1359 void AddConversionCandidate(CXXConversionDecl *Conversion, 1360 DeclAccessPair FoundDecl, 1361 CXXRecordDecl *ActingContext, 1362 Expr *From, QualType ToType, 1363 OverloadCandidateSet& CandidateSet); 1364 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1365 DeclAccessPair FoundDecl, 1366 CXXRecordDecl *ActingContext, 1367 Expr *From, QualType ToType, 1368 OverloadCandidateSet &CandidateSet); 1369 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1370 DeclAccessPair FoundDecl, 1371 CXXRecordDecl *ActingContext, 1372 const FunctionProtoType *Proto, 1373 Expr *Object, Expr **Args, unsigned NumArgs, 1374 OverloadCandidateSet& CandidateSet); 1375 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1376 SourceLocation OpLoc, 1377 Expr **Args, unsigned NumArgs, 1378 OverloadCandidateSet& CandidateSet, 1379 SourceRange OpRange = SourceRange()); 1380 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1381 Expr **Args, unsigned NumArgs, 1382 OverloadCandidateSet& CandidateSet, 1383 bool IsAssignmentOperator = false, 1384 unsigned NumContextualBoolArguments = 0); 1385 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1386 SourceLocation OpLoc, 1387 Expr **Args, unsigned NumArgs, 1388 OverloadCandidateSet& CandidateSet); 1389 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1390 bool Operator, 1391 Expr **Args, unsigned NumArgs, 1392 TemplateArgumentListInfo *ExplicitTemplateArgs, 1393 OverloadCandidateSet& CandidateSet, 1394 bool PartialOverloading = false, 1395 bool StdNamespaceIsAssociated = false); 1396 1397 // Emit as a 'note' the specific overload candidate 1398 void NoteOverloadCandidate(FunctionDecl *Fn); 1399 1400 // Emit as a series of 'note's all template and non-templates 1401 // identified by the expression Expr 1402 void NoteAllOverloadCandidates(Expr* E); 1403 1404 // [PossiblyAFunctionType] --> [Return] 1405 // NonFunctionType --> NonFunctionType 1406 // R (A) --> R(A) 1407 // R (*)(A) --> R (A) 1408 // R (&)(A) --> R (A) 1409 // R (S::*)(A) --> R (A) 1410 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1411 1412 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1413 bool Complain, 1414 DeclAccessPair &Found); 1415 1416 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1417 bool Complain = false, 1418 DeclAccessPair* Found = 0); 1419 1420 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1421 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1422 bool Complain = false, 1423 const SourceRange& OpRangeForComplaining = SourceRange(), 1424 QualType DestTypeForComplaining = QualType(), 1425 unsigned DiagIDForComplaining = 0); 1426 1427 1428 Expr *FixOverloadedFunctionReference(Expr *E, 1429 DeclAccessPair FoundDecl, 1430 FunctionDecl *Fn); 1431 ExprResult FixOverloadedFunctionReference(ExprResult, 1432 DeclAccessPair FoundDecl, 1433 FunctionDecl *Fn); 1434 1435 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1436 Expr **Args, unsigned NumArgs, 1437 OverloadCandidateSet &CandidateSet, 1438 bool PartialOverloading = false); 1439 1440 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1441 UnresolvedLookupExpr *ULE, 1442 SourceLocation LParenLoc, 1443 Expr **Args, unsigned NumArgs, 1444 SourceLocation RParenLoc, 1445 Expr *ExecConfig); 1446 1447 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1448 unsigned Opc, 1449 const UnresolvedSetImpl &Fns, 1450 Expr *input); 1451 1452 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1453 unsigned Opc, 1454 const UnresolvedSetImpl &Fns, 1455 Expr *LHS, Expr *RHS); 1456 1457 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1458 SourceLocation RLoc, 1459 Expr *Base,Expr *Idx); 1460 1461 ExprResult 1462 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1463 SourceLocation LParenLoc, Expr **Args, 1464 unsigned NumArgs, SourceLocation RParenLoc); 1465 ExprResult 1466 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1467 Expr **Args, unsigned NumArgs, 1468 SourceLocation RParenLoc); 1469 1470 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1471 SourceLocation OpLoc); 1472 1473 /// CheckCallReturnType - Checks that a call expression's return type is 1474 /// complete. Returns true on failure. The location passed in is the location 1475 /// that best represents the call. 1476 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1477 CallExpr *CE, FunctionDecl *FD); 1478 1479 /// Helpers for dealing with blocks and functions. 1480 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1481 bool CheckParameterNames); 1482 void CheckCXXDefaultArguments(FunctionDecl *FD); 1483 void CheckExtraCXXDefaultArguments(Declarator &D); 1484 Scope *getNonFieldDeclScope(Scope *S); 1485 1486 /// \name Name lookup 1487 /// 1488 /// These routines provide name lookup that is used during semantic 1489 /// analysis to resolve the various kinds of names (identifiers, 1490 /// overloaded operator names, constructor names, etc.) into zero or 1491 /// more declarations within a particular scope. The major entry 1492 /// points are LookupName, which performs unqualified name lookup, 1493 /// and LookupQualifiedName, which performs qualified name lookup. 1494 /// 1495 /// All name lookup is performed based on some specific criteria, 1496 /// which specify what names will be visible to name lookup and how 1497 /// far name lookup should work. These criteria are important both 1498 /// for capturing language semantics (certain lookups will ignore 1499 /// certain names, for example) and for performance, since name 1500 /// lookup is often a bottleneck in the compilation of C++. Name 1501 /// lookup criteria is specified via the LookupCriteria enumeration. 1502 /// 1503 /// The results of name lookup can vary based on the kind of name 1504 /// lookup performed, the current language, and the translation 1505 /// unit. In C, for example, name lookup will either return nothing 1506 /// (no entity found) or a single declaration. In C++, name lookup 1507 /// can additionally refer to a set of overloaded functions or 1508 /// result in an ambiguity. All of the possible results of name 1509 /// lookup are captured by the LookupResult class, which provides 1510 /// the ability to distinguish among them. 1511 //@{ 1512 1513 /// @brief Describes the kind of name lookup to perform. 1514 enum LookupNameKind { 1515 /// Ordinary name lookup, which finds ordinary names (functions, 1516 /// variables, typedefs, etc.) in C and most kinds of names 1517 /// (functions, variables, members, types, etc.) in C++. 1518 LookupOrdinaryName = 0, 1519 /// Tag name lookup, which finds the names of enums, classes, 1520 /// structs, and unions. 1521 LookupTagName, 1522 /// Label name lookup. 1523 LookupLabel, 1524 /// Member name lookup, which finds the names of 1525 /// class/struct/union members. 1526 LookupMemberName, 1527 /// Look up of an operator name (e.g., operator+) for use with 1528 /// operator overloading. This lookup is similar to ordinary name 1529 /// lookup, but will ignore any declarations that are class members. 1530 LookupOperatorName, 1531 /// Look up of a name that precedes the '::' scope resolution 1532 /// operator in C++. This lookup completely ignores operator, object, 1533 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1534 LookupNestedNameSpecifierName, 1535 /// Look up a namespace name within a C++ using directive or 1536 /// namespace alias definition, ignoring non-namespace names (C++ 1537 /// [basic.lookup.udir]p1). 1538 LookupNamespaceName, 1539 /// Look up all declarations in a scope with the given name, 1540 /// including resolved using declarations. This is appropriate 1541 /// for checking redeclarations for a using declaration. 1542 LookupUsingDeclName, 1543 /// Look up an ordinary name that is going to be redeclared as a 1544 /// name with linkage. This lookup ignores any declarations that 1545 /// are outside of the current scope unless they have linkage. See 1546 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1547 LookupRedeclarationWithLinkage, 1548 /// Look up the name of an Objective-C protocol. 1549 LookupObjCProtocolName, 1550 /// \brief Look up any declaration with any name. 1551 LookupAnyName 1552 }; 1553 1554 /// \brief Specifies whether (or how) name lookup is being performed for a 1555 /// redeclaration (vs. a reference). 1556 enum RedeclarationKind { 1557 /// \brief The lookup is a reference to this name that is not for the 1558 /// purpose of redeclaring the name. 1559 NotForRedeclaration = 0, 1560 /// \brief The lookup results will be used for redeclaration of a name, 1561 /// if an entity by that name already exists. 1562 ForRedeclaration 1563 }; 1564 1565private: 1566 bool CppLookupName(LookupResult &R, Scope *S); 1567 1568public: 1569 /// \brief Look up a name, looking for a single declaration. Return 1570 /// null if the results were absent, ambiguous, or overloaded. 1571 /// 1572 /// It is preferable to use the elaborated form and explicitly handle 1573 /// ambiguity and overloaded. 1574 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1575 SourceLocation Loc, 1576 LookupNameKind NameKind, 1577 RedeclarationKind Redecl 1578 = NotForRedeclaration); 1579 bool LookupName(LookupResult &R, Scope *S, 1580 bool AllowBuiltinCreation = false); 1581 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1582 bool InUnqualifiedLookup = false); 1583 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1584 bool AllowBuiltinCreation = false, 1585 bool EnteringContext = false); 1586 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1587 1588 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1589 QualType T1, QualType T2, 1590 UnresolvedSetImpl &Functions); 1591 1592 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1593 SourceLocation GnuLabelLoc = SourceLocation()); 1594 1595 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1596 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1597 1598 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1599 Expr **Args, unsigned NumArgs, 1600 ADLResult &Functions, 1601 bool StdNamespaceIsAssociated = false); 1602 1603 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1604 VisibleDeclConsumer &Consumer, 1605 bool IncludeGlobalScope = true); 1606 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1607 VisibleDeclConsumer &Consumer, 1608 bool IncludeGlobalScope = true); 1609 1610 /// \brief The context in which typo-correction occurs. 1611 /// 1612 /// The typo-correction context affects which keywords (if any) are 1613 /// considered when trying to correct for typos. 1614 enum CorrectTypoContext { 1615 /// \brief An unknown context, where any keyword might be valid. 1616 CTC_Unknown, 1617 /// \brief A context where no keywords are used (e.g. we expect an actual 1618 /// name). 1619 CTC_NoKeywords, 1620 /// \brief A context where we're correcting a type name. 1621 CTC_Type, 1622 /// \brief An expression context. 1623 CTC_Expression, 1624 /// \brief A type cast, or anything else that can be followed by a '<'. 1625 CTC_CXXCasts, 1626 /// \brief A member lookup context. 1627 CTC_MemberLookup, 1628 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1629 CTC_ObjCIvarLookup, 1630 /// \brief An Objective-C property lookup context (e.g., self.prop). 1631 CTC_ObjCPropertyLookup, 1632 /// \brief The receiver of an Objective-C message send within an 1633 /// Objective-C method where 'super' is a valid keyword. 1634 CTC_ObjCMessageReceiver 1635 }; 1636 1637 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1638 DeclContext *MemberContext = 0, 1639 bool EnteringContext = false, 1640 CorrectTypoContext CTC = CTC_Unknown, 1641 const ObjCObjectPointerType *OPT = 0); 1642 1643 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1644 AssociatedNamespaceSet &AssociatedNamespaces, 1645 AssociatedClassSet &AssociatedClasses); 1646 1647 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1648 //@} 1649 1650 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1651 SourceLocation IdLoc, 1652 bool TypoCorrection = false); 1653 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1654 Scope *S, bool ForRedeclaration, 1655 SourceLocation Loc); 1656 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1657 Scope *S); 1658 void AddKnownFunctionAttributes(FunctionDecl *FD); 1659 1660 // More parsing and symbol table subroutines. 1661 1662 // Decl attributes - this routine is the top level dispatcher. 1663 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1664 bool NonInheritable = true, bool Inheritable = true); 1665 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1666 bool NonInheritable = true, bool Inheritable = true); 1667 1668 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1669 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1670 bool CheckNoReturnAttr(const AttributeList &attr); 1671 1672 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1673 bool &IncompleteImpl, unsigned DiagID); 1674 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1675 ObjCMethodDecl *MethodDecl, 1676 bool IsProtocolMethodDecl); 1677 1678 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1679 ObjCInterfaceDecl *IDecl); 1680 1681 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1682 1683 /// CheckProtocolMethodDefs - This routine checks unimplemented 1684 /// methods declared in protocol, and those referenced by it. 1685 /// \param IDecl - Used for checking for methods which may have been 1686 /// inherited. 1687 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1688 ObjCProtocolDecl *PDecl, 1689 bool& IncompleteImpl, 1690 const SelectorSet &InsMap, 1691 const SelectorSet &ClsMap, 1692 ObjCContainerDecl *CDecl); 1693 1694 /// CheckImplementationIvars - This routine checks if the instance variables 1695 /// listed in the implelementation match those listed in the interface. 1696 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1697 ObjCIvarDecl **Fields, unsigned nIvars, 1698 SourceLocation Loc); 1699 1700 /// \brief Determine whether we can synthesize a provisional ivar for the 1701 /// given name. 1702 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1703 1704 /// \brief Determine whether we can synthesize a provisional ivar for the 1705 /// given property. 1706 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1707 1708 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1709 /// remains unimplemented in the class or category @implementation. 1710 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1711 ObjCContainerDecl* IDecl, 1712 bool IncompleteImpl = false); 1713 1714 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1715 /// which must be implemented by this implementation. 1716 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1717 ObjCContainerDecl *CDecl, 1718 const SelectorSet &InsMap); 1719 1720 /// DefaultSynthesizeProperties - This routine default synthesizes all 1721 /// properties which must be synthesized in class's @implementation. 1722 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1723 ObjCInterfaceDecl *IDecl); 1724 1725 /// CollectImmediateProperties - This routine collects all properties in 1726 /// the class and its conforming protocols; but not those it its super class. 1727 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1728 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1729 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1730 1731 1732 /// LookupPropertyDecl - Looks up a property in the current class and all 1733 /// its protocols. 1734 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1735 IdentifierInfo *II); 1736 1737 /// Called by ActOnProperty to handle @property declarations in 1738 //// class extensions. 1739 Decl *HandlePropertyInClassExtension(Scope *S, 1740 ObjCCategoryDecl *CDecl, 1741 SourceLocation AtLoc, 1742 FieldDeclarator &FD, 1743 Selector GetterSel, 1744 Selector SetterSel, 1745 const bool isAssign, 1746 const bool isReadWrite, 1747 const unsigned Attributes, 1748 bool *isOverridingProperty, 1749 TypeSourceInfo *T, 1750 tok::ObjCKeywordKind MethodImplKind); 1751 1752 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1753 /// handle creating the ObjcPropertyDecl for a category or @interface. 1754 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1755 ObjCContainerDecl *CDecl, 1756 SourceLocation AtLoc, 1757 FieldDeclarator &FD, 1758 Selector GetterSel, 1759 Selector SetterSel, 1760 const bool isAssign, 1761 const bool isReadWrite, 1762 const unsigned Attributes, 1763 TypeSourceInfo *T, 1764 tok::ObjCKeywordKind MethodImplKind, 1765 DeclContext *lexicalDC = 0); 1766 1767 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1768 /// warning) when atomic property has one but not the other user-declared 1769 /// setter or getter. 1770 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1771 ObjCContainerDecl* IDecl); 1772 1773 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1774 1775 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1776 /// true, or false, accordingly. 1777 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1778 const ObjCMethodDecl *PrevMethod, 1779 bool matchBasedOnSizeAndAlignment = false, 1780 bool matchBasedOnStrictEqulity = false); 1781 1782 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1783 /// or protocol against those declared in their implementations. 1784 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1785 const SelectorSet &ClsMap, 1786 SelectorSet &InsMapSeen, 1787 SelectorSet &ClsMapSeen, 1788 ObjCImplDecl* IMPDecl, 1789 ObjCContainerDecl* IDecl, 1790 bool &IncompleteImpl, 1791 bool ImmediateClass); 1792 1793private: 1794 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1795 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1796 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1797 1798 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1799 /// optionally warns if there are multiple signatures. 1800 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1801 bool receiverIdOrClass, 1802 bool warn, bool instance); 1803 1804public: 1805 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1806 /// unit are added to a global pool. This allows us to efficiently associate 1807 /// a selector with a method declaraation for purposes of typechecking 1808 /// messages sent to "id" (where the class of the object is unknown). 1809 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1810 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1811 } 1812 1813 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1814 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1815 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1816 } 1817 1818 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1819 /// there are multiple signatures. 1820 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1821 bool receiverIdOrClass=false, 1822 bool warn=true) { 1823 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1824 warn, /*instance*/true); 1825 } 1826 1827 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1828 /// there are multiple signatures. 1829 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1830 bool receiverIdOrClass=false, 1831 bool warn=true) { 1832 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1833 warn, /*instance*/false); 1834 } 1835 1836 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1837 /// implementation. 1838 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1839 1840 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1841 /// initialization. 1842 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1843 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1844 1845 //===--------------------------------------------------------------------===// 1846 // Statement Parsing Callbacks: SemaStmt.cpp. 1847public: 1848 class FullExprArg { 1849 public: 1850 FullExprArg(Sema &actions) : E(0) { } 1851 1852 // FIXME: The const_cast here is ugly. RValue references would make this 1853 // much nicer (or we could duplicate a bunch of the move semantics 1854 // emulation code from Ownership.h). 1855 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1856 1857 ExprResult release() { 1858 return move(E); 1859 } 1860 1861 Expr *get() const { return E; } 1862 1863 Expr *operator->() { 1864 return E; 1865 } 1866 1867 private: 1868 // FIXME: No need to make the entire Sema class a friend when it's just 1869 // Sema::MakeFullExpr that needs access to the constructor below. 1870 friend class Sema; 1871 1872 explicit FullExprArg(Expr *expr) : E(expr) {} 1873 1874 Expr *E; 1875 }; 1876 1877 FullExprArg MakeFullExpr(Expr *Arg) { 1878 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1879 } 1880 1881 StmtResult ActOnExprStmt(FullExprArg Expr); 1882 1883 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1884 bool LeadingEmptyMacro = false); 1885 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1886 MultiStmtArg Elts, 1887 bool isStmtExpr); 1888 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1889 SourceLocation StartLoc, 1890 SourceLocation EndLoc); 1891 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1892 StmtResult ActOnForEachLValueExpr(Expr *E); 1893 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1894 SourceLocation DotDotDotLoc, Expr *RHSVal, 1895 SourceLocation ColonLoc); 1896 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1897 1898 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1899 SourceLocation ColonLoc, 1900 Stmt *SubStmt, Scope *CurScope); 1901 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1902 SourceLocation ColonLoc, Stmt *SubStmt); 1903 1904 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1905 FullExprArg CondVal, Decl *CondVar, 1906 Stmt *ThenVal, 1907 SourceLocation ElseLoc, Stmt *ElseVal); 1908 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1909 Expr *Cond, 1910 Decl *CondVar); 1911 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1912 Stmt *Switch, Stmt *Body); 1913 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1914 FullExprArg Cond, 1915 Decl *CondVar, Stmt *Body); 1916 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1917 SourceLocation WhileLoc, 1918 SourceLocation CondLParen, Expr *Cond, 1919 SourceLocation CondRParen); 1920 1921 StmtResult ActOnForStmt(SourceLocation ForLoc, 1922 SourceLocation LParenLoc, 1923 Stmt *First, FullExprArg Second, 1924 Decl *SecondVar, 1925 FullExprArg Third, 1926 SourceLocation RParenLoc, 1927 Stmt *Body); 1928 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1929 SourceLocation LParenLoc, 1930 Stmt *First, Expr *Second, 1931 SourceLocation RParenLoc, Stmt *Body); 1932 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 1933 SourceLocation LParenLoc, Stmt *LoopVar, 1934 SourceLocation ColonLoc, Expr *Collection, 1935 SourceLocation RParenLoc); 1936 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 1937 SourceLocation ColonLoc, 1938 Stmt *RangeDecl, Stmt *BeginEndDecl, 1939 Expr *Cond, Expr *Inc, 1940 Stmt *LoopVarDecl, 1941 SourceLocation RParenLoc); 1942 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 1943 1944 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1945 SourceLocation LabelLoc, 1946 LabelDecl *TheDecl); 1947 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1948 SourceLocation StarLoc, 1949 Expr *DestExp); 1950 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1951 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1952 1953 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1954 bool AllowFunctionParameters); 1955 1956 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1957 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1958 1959 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1960 bool IsSimple, bool IsVolatile, 1961 unsigned NumOutputs, unsigned NumInputs, 1962 IdentifierInfo **Names, 1963 MultiExprArg Constraints, 1964 MultiExprArg Exprs, 1965 Expr *AsmString, 1966 MultiExprArg Clobbers, 1967 SourceLocation RParenLoc, 1968 bool MSAsm = false); 1969 1970 1971 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1972 SourceLocation StartLoc, 1973 SourceLocation IdLoc, IdentifierInfo *Id, 1974 bool Invalid = false); 1975 1976 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1977 1978 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1979 Decl *Parm, Stmt *Body); 1980 1981 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1982 1983 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1984 MultiStmtArg Catch, Stmt *Finally); 1985 1986 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1987 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1988 Scope *CurScope); 1989 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1990 Expr *SynchExpr, 1991 Stmt *SynchBody); 1992 1993 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 1994 SourceLocation StartLoc, 1995 SourceLocation IdLoc, 1996 IdentifierInfo *Id); 1997 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1998 1999 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2000 Decl *ExDecl, Stmt *HandlerBlock); 2001 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2002 MultiStmtArg Handlers); 2003 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2004 2005 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2006 2007 /// \brief If it's a file scoped decl that must warn if not used, keep track 2008 /// of it. 2009 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2010 2011 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2012 /// whose result is unused, warn. 2013 void DiagnoseUnusedExprResult(const Stmt *S); 2014 void DiagnoseUnusedDecl(const NamedDecl *ND); 2015 2016 ParsingDeclState PushParsingDeclaration() { 2017 return DelayedDiagnostics.pushParsingDecl(); 2018 } 2019 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2020 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2021 } 2022 2023 typedef ProcessingContextState ParsingClassState; 2024 ParsingClassState PushParsingClass() { 2025 return DelayedDiagnostics.pushContext(); 2026 } 2027 void PopParsingClass(ParsingClassState state) { 2028 DelayedDiagnostics.popContext(state); 2029 } 2030 2031 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2032 SourceLocation Loc, 2033 const ObjCInterfaceDecl *UnknownObjCClass=0); 2034 2035 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2036 2037 //===--------------------------------------------------------------------===// 2038 // Expression Parsing Callbacks: SemaExpr.cpp. 2039 2040 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2041 const ObjCInterfaceDecl *UnknownObjCClass=0); 2042 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2043 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2044 ObjCMethodDecl *Getter, 2045 SourceLocation Loc); 2046 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2047 Expr **Args, unsigned NumArgs); 2048 2049 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2050 2051 void PopExpressionEvaluationContext(); 2052 2053 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2054 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2055 void MarkDeclarationsReferencedInExpr(Expr *E); 2056 2057 /// \brief Conditionally issue a diagnostic based on the current 2058 /// evaluation context. 2059 /// 2060 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2061 /// the function body is parsed, and then do a basic reachability analysis to 2062 /// determine if the statement is reachable. If it is unreachable, the 2063 /// diagnostic will not be emitted. 2064 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2065 const PartialDiagnostic &PD); 2066 2067 // Primary Expressions. 2068 SourceRange getExprRange(Expr *E) const; 2069 2070 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2071 IdentifierInfo *II, 2072 SourceLocation NameLoc); 2073 2074 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2075 bool HasTrailingLParen, bool IsAddressOfOperand); 2076 2077 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2078 CorrectTypoContext CTC = CTC_Unknown); 2079 2080 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2081 bool AllowBuiltinCreation=false); 2082 2083 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2084 const DeclarationNameInfo &NameInfo, 2085 bool isAddressOfOperand, 2086 const TemplateArgumentListInfo *TemplateArgs); 2087 2088 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2089 ExprValueKind VK, 2090 SourceLocation Loc, 2091 const CXXScopeSpec *SS = 0); 2092 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2093 ExprValueKind VK, 2094 const DeclarationNameInfo &NameInfo, 2095 const CXXScopeSpec *SS = 0); 2096 ExprResult 2097 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2098 SourceLocation nameLoc, 2099 IndirectFieldDecl *indirectField, 2100 Expr *baseObjectExpr = 0, 2101 SourceLocation opLoc = SourceLocation()); 2102 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2103 LookupResult &R, 2104 const TemplateArgumentListInfo *TemplateArgs); 2105 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2106 LookupResult &R, 2107 const TemplateArgumentListInfo *TemplateArgs, 2108 bool IsDefiniteInstance); 2109 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2110 const LookupResult &R, 2111 bool HasTrailingLParen); 2112 2113 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2114 const DeclarationNameInfo &NameInfo); 2115 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2116 const DeclarationNameInfo &NameInfo, 2117 const TemplateArgumentListInfo *TemplateArgs); 2118 2119 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2120 LookupResult &R, 2121 bool ADL); 2122 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2123 const DeclarationNameInfo &NameInfo, 2124 NamedDecl *D); 2125 2126 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2127 ExprResult ActOnNumericConstant(const Token &); 2128 ExprResult ActOnCharacterConstant(const Token &); 2129 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2130 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2131 SourceLocation R, 2132 MultiExprArg Val, 2133 ParsedType TypeOfCast = ParsedType()); 2134 2135 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2136 /// fragments (e.g. "foo" "bar" L"baz"). 2137 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2138 2139 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2140 SourceLocation DefaultLoc, 2141 SourceLocation RParenLoc, 2142 Expr *ControllingExpr, 2143 MultiTypeArg Types, 2144 MultiExprArg Exprs); 2145 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2146 SourceLocation DefaultLoc, 2147 SourceLocation RParenLoc, 2148 Expr *ControllingExpr, 2149 TypeSourceInfo **Types, 2150 Expr **Exprs, 2151 unsigned NumAssocs); 2152 2153 // Binary/Unary Operators. 'Tok' is the token for the operator. 2154 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2155 Expr *InputArg); 2156 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2157 UnaryOperatorKind Opc, Expr *input); 2158 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2159 tok::TokenKind Op, Expr *Input); 2160 2161 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2162 SourceLocation OpLoc, 2163 UnaryExprOrTypeTrait ExprKind, 2164 SourceRange R); 2165 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2166 UnaryExprOrTypeTrait ExprKind, 2167 SourceRange R); 2168 ExprResult 2169 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2170 UnaryExprOrTypeTrait ExprKind, 2171 bool isType, void *TyOrEx, 2172 const SourceRange &ArgRange); 2173 2174 ExprResult CheckPlaceholderExpr(Expr *E); 2175 bool CheckVecStepExpr(Expr *E, SourceLocation OpLoc, SourceRange R); 2176 2177 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2178 SourceRange R, 2179 UnaryExprOrTypeTrait ExprKind); 2180 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2181 SourceLocation OpLoc, 2182 IdentifierInfo &Name, 2183 SourceLocation NameLoc, 2184 SourceLocation RParenLoc); 2185 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2186 tok::TokenKind Kind, Expr *Input); 2187 2188 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2189 Expr *Idx, SourceLocation RLoc); 2190 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2191 Expr *Idx, SourceLocation RLoc); 2192 2193 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2194 SourceLocation OpLoc, bool IsArrow, 2195 CXXScopeSpec &SS, 2196 NamedDecl *FirstQualifierInScope, 2197 const DeclarationNameInfo &NameInfo, 2198 const TemplateArgumentListInfo *TemplateArgs); 2199 2200 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2201 SourceLocation OpLoc, bool IsArrow, 2202 const CXXScopeSpec &SS, 2203 NamedDecl *FirstQualifierInScope, 2204 LookupResult &R, 2205 const TemplateArgumentListInfo *TemplateArgs, 2206 bool SuppressQualifierCheck = false); 2207 2208 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2209 bool &IsArrow, SourceLocation OpLoc, 2210 CXXScopeSpec &SS, 2211 Decl *ObjCImpDecl, 2212 bool HasTemplateArgs); 2213 2214 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2215 const CXXScopeSpec &SS, 2216 const LookupResult &R); 2217 2218 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2219 bool IsArrow, SourceLocation OpLoc, 2220 const CXXScopeSpec &SS, 2221 NamedDecl *FirstQualifierInScope, 2222 const DeclarationNameInfo &NameInfo, 2223 const TemplateArgumentListInfo *TemplateArgs); 2224 2225 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2226 SourceLocation OpLoc, 2227 tok::TokenKind OpKind, 2228 CXXScopeSpec &SS, 2229 UnqualifiedId &Member, 2230 Decl *ObjCImpDecl, 2231 bool HasTrailingLParen); 2232 2233 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2234 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2235 FunctionDecl *FDecl, 2236 const FunctionProtoType *Proto, 2237 Expr **Args, unsigned NumArgs, 2238 SourceLocation RParenLoc); 2239 2240 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2241 /// This provides the location of the left/right parens and a list of comma 2242 /// locations. 2243 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2244 MultiExprArg Args, SourceLocation RParenLoc, 2245 Expr *ExecConfig = 0); 2246 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2247 SourceLocation LParenLoc, 2248 Expr **Args, unsigned NumArgs, 2249 SourceLocation RParenLoc, 2250 Expr *ExecConfig = 0); 2251 2252 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2253 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2254 2255 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2256 ParsedType Ty, SourceLocation RParenLoc, 2257 Expr *Op); 2258 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2259 TypeSourceInfo *Ty, 2260 SourceLocation RParenLoc, 2261 Expr *Op); 2262 2263 bool TypeIsVectorType(ParsedType Ty) { 2264 return GetTypeFromParser(Ty)->isVectorType(); 2265 } 2266 2267 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2268 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2269 SourceLocation RParenLoc, Expr *E, 2270 TypeSourceInfo *TInfo); 2271 2272 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2273 ParsedType Ty, 2274 SourceLocation RParenLoc, 2275 Expr *Op); 2276 2277 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2278 TypeSourceInfo *TInfo, 2279 SourceLocation RParenLoc, 2280 Expr *InitExpr); 2281 2282 ExprResult ActOnInitList(SourceLocation LParenLoc, 2283 MultiExprArg InitList, 2284 SourceLocation RParenLoc); 2285 2286 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2287 SourceLocation Loc, 2288 bool GNUSyntax, 2289 ExprResult Init); 2290 2291 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2292 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2293 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2294 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2295 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2296 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2297 2298 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2299 /// in the case of a the GNU conditional expr extension. 2300 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2301 SourceLocation ColonLoc, 2302 Expr *Cond, Expr *LHS, Expr *RHS); 2303 2304 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2305 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2306 LabelDecl *LD); 2307 2308 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2309 SourceLocation RPLoc); // "({..})" 2310 2311 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2312 struct OffsetOfComponent { 2313 SourceLocation LocStart, LocEnd; 2314 bool isBrackets; // true if [expr], false if .ident 2315 union { 2316 IdentifierInfo *IdentInfo; 2317 ExprTy *E; 2318 } U; 2319 }; 2320 2321 /// __builtin_offsetof(type, a.b[123][456].c) 2322 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2323 TypeSourceInfo *TInfo, 2324 OffsetOfComponent *CompPtr, 2325 unsigned NumComponents, 2326 SourceLocation RParenLoc); 2327 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2328 SourceLocation BuiltinLoc, 2329 SourceLocation TypeLoc, 2330 ParsedType Arg1, 2331 OffsetOfComponent *CompPtr, 2332 unsigned NumComponents, 2333 SourceLocation RParenLoc); 2334 2335 // __builtin_choose_expr(constExpr, expr1, expr2) 2336 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2337 Expr *cond, Expr *expr1, 2338 Expr *expr2, SourceLocation RPLoc); 2339 2340 // __builtin_va_arg(expr, type) 2341 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2342 Expr *expr, ParsedType type, 2343 SourceLocation RPLoc); 2344 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2345 Expr *expr, TypeSourceInfo *TInfo, 2346 SourceLocation RPLoc); 2347 2348 // __null 2349 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2350 2351 bool CheckCaseExpression(Expr *expr); 2352 2353 //===------------------------- "Block" Extension ------------------------===// 2354 2355 /// ActOnBlockStart - This callback is invoked when a block literal is 2356 /// started. 2357 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2358 2359 /// ActOnBlockArguments - This callback allows processing of block arguments. 2360 /// If there are no arguments, this is still invoked. 2361 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2362 2363 /// ActOnBlockError - If there is an error parsing a block, this callback 2364 /// is invoked to pop the information about the block from the action impl. 2365 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2366 2367 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2368 /// literal was successfully completed. ^(int x){...} 2369 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2370 Stmt *Body, Scope *CurScope); 2371 2372 //===---------------------------- C++ Features --------------------------===// 2373 2374 // Act on C++ namespaces 2375 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2376 SourceLocation NamespaceLoc, 2377 SourceLocation IdentLoc, 2378 IdentifierInfo *Ident, 2379 SourceLocation LBrace, 2380 AttributeList *AttrList); 2381 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2382 2383 NamespaceDecl *getStdNamespace() const; 2384 NamespaceDecl *getOrCreateStdNamespace(); 2385 2386 CXXRecordDecl *getStdBadAlloc() const; 2387 2388 Decl *ActOnUsingDirective(Scope *CurScope, 2389 SourceLocation UsingLoc, 2390 SourceLocation NamespcLoc, 2391 CXXScopeSpec &SS, 2392 SourceLocation IdentLoc, 2393 IdentifierInfo *NamespcName, 2394 AttributeList *AttrList); 2395 2396 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2397 2398 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2399 SourceLocation NamespaceLoc, 2400 SourceLocation AliasLoc, 2401 IdentifierInfo *Alias, 2402 CXXScopeSpec &SS, 2403 SourceLocation IdentLoc, 2404 IdentifierInfo *Ident); 2405 2406 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2407 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2408 const LookupResult &PreviousDecls); 2409 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2410 NamedDecl *Target); 2411 2412 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2413 bool isTypeName, 2414 const CXXScopeSpec &SS, 2415 SourceLocation NameLoc, 2416 const LookupResult &Previous); 2417 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2418 const CXXScopeSpec &SS, 2419 SourceLocation NameLoc); 2420 2421 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2422 SourceLocation UsingLoc, 2423 CXXScopeSpec &SS, 2424 const DeclarationNameInfo &NameInfo, 2425 AttributeList *AttrList, 2426 bool IsInstantiation, 2427 bool IsTypeName, 2428 SourceLocation TypenameLoc); 2429 2430 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2431 2432 Decl *ActOnUsingDeclaration(Scope *CurScope, 2433 AccessSpecifier AS, 2434 bool HasUsingKeyword, 2435 SourceLocation UsingLoc, 2436 CXXScopeSpec &SS, 2437 UnqualifiedId &Name, 2438 AttributeList *AttrList, 2439 bool IsTypeName, 2440 SourceLocation TypenameLoc); 2441 Decl *ActOnAliasDeclaration(Scope *CurScope, 2442 AccessSpecifier AS, 2443 SourceLocation UsingLoc, 2444 UnqualifiedId &Name, 2445 TypeResult Type); 2446 2447 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2448 /// ActOnDeclarator, when a C++ direct initializer is present. 2449 /// e.g: "int x(1);" 2450 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2451 SourceLocation LParenLoc, 2452 MultiExprArg Exprs, 2453 SourceLocation RParenLoc, 2454 bool TypeMayContainAuto); 2455 2456 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2457 /// and sets it as the initializer for the the passed in VarDecl. 2458 bool InitializeVarWithConstructor(VarDecl *VD, 2459 CXXConstructorDecl *Constructor, 2460 MultiExprArg Exprs); 2461 2462 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2463 /// including handling of its default argument expressions. 2464 /// 2465 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2466 ExprResult 2467 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2468 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2469 bool RequiresZeroInit, unsigned ConstructKind, 2470 SourceRange ParenRange); 2471 2472 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2473 // the constructor can be elidable? 2474 ExprResult 2475 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2476 CXXConstructorDecl *Constructor, bool Elidable, 2477 MultiExprArg Exprs, bool RequiresZeroInit, 2478 unsigned ConstructKind, 2479 SourceRange ParenRange); 2480 2481 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2482 /// the default expr if needed. 2483 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2484 FunctionDecl *FD, 2485 ParmVarDecl *Param); 2486 2487 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2488 /// constructed variable. 2489 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2490 2491 /// \brief Declare the implicit default constructor for the given class. 2492 /// 2493 /// \param ClassDecl The class declaration into which the implicit 2494 /// default constructor will be added. 2495 /// 2496 /// \returns The implicitly-declared default constructor. 2497 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2498 CXXRecordDecl *ClassDecl); 2499 2500 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2501 /// defining this constructor as the default constructor. 2502 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2503 CXXConstructorDecl *Constructor); 2504 2505 /// \brief Declare the implicit destructor for the given class. 2506 /// 2507 /// \param ClassDecl The class declaration into which the implicit 2508 /// destructor will be added. 2509 /// 2510 /// \returns The implicitly-declared destructor. 2511 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2512 2513 /// DefineImplicitDestructor - Checks for feasibility of 2514 /// defining this destructor as the default destructor. 2515 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2516 CXXDestructorDecl *Destructor); 2517 2518 /// \brief Declare all inherited constructors for the given class. 2519 /// 2520 /// \param ClassDecl The class declaration into which the inherited 2521 /// constructors will be added. 2522 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2523 2524 /// \brief Declare the implicit copy constructor for the given class. 2525 /// 2526 /// \param S The scope of the class, which may be NULL if this is a 2527 /// template instantiation. 2528 /// 2529 /// \param ClassDecl The class declaration into which the implicit 2530 /// copy constructor will be added. 2531 /// 2532 /// \returns The implicitly-declared copy constructor. 2533 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2534 2535 /// DefineImplicitCopyConstructor - Checks for feasibility of 2536 /// defining this constructor as the copy constructor. 2537 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2538 CXXConstructorDecl *Constructor, 2539 unsigned TypeQuals); 2540 2541 /// \brief Declare the implicit copy assignment operator for the given class. 2542 /// 2543 /// \param S The scope of the class, which may be NULL if this is a 2544 /// template instantiation. 2545 /// 2546 /// \param ClassDecl The class declaration into which the implicit 2547 /// copy-assignment operator will be added. 2548 /// 2549 /// \returns The implicitly-declared copy assignment operator. 2550 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2551 2552 /// \brief Defined an implicitly-declared copy assignment operator. 2553 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2554 CXXMethodDecl *MethodDecl); 2555 2556 /// \brief Force the declaration of any implicitly-declared members of this 2557 /// class. 2558 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2559 2560 /// MaybeBindToTemporary - If the passed in expression has a record type with 2561 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2562 /// it simply returns the passed in expression. 2563 ExprResult MaybeBindToTemporary(Expr *E); 2564 2565 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2566 MultiExprArg ArgsPtr, 2567 SourceLocation Loc, 2568 ASTOwningVector<Expr*> &ConvertedArgs); 2569 2570 ParsedType getDestructorName(SourceLocation TildeLoc, 2571 IdentifierInfo &II, SourceLocation NameLoc, 2572 Scope *S, CXXScopeSpec &SS, 2573 ParsedType ObjectType, 2574 bool EnteringContext); 2575 2576 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2577 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2578 tok::TokenKind Kind, 2579 SourceLocation LAngleBracketLoc, 2580 ParsedType Ty, 2581 SourceLocation RAngleBracketLoc, 2582 SourceLocation LParenLoc, 2583 Expr *E, 2584 SourceLocation RParenLoc); 2585 2586 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2587 tok::TokenKind Kind, 2588 TypeSourceInfo *Ty, 2589 Expr *E, 2590 SourceRange AngleBrackets, 2591 SourceRange Parens); 2592 2593 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2594 SourceLocation TypeidLoc, 2595 TypeSourceInfo *Operand, 2596 SourceLocation RParenLoc); 2597 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2598 SourceLocation TypeidLoc, 2599 Expr *Operand, 2600 SourceLocation RParenLoc); 2601 2602 /// ActOnCXXTypeid - Parse typeid( something ). 2603 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2604 SourceLocation LParenLoc, bool isType, 2605 void *TyOrExpr, 2606 SourceLocation RParenLoc); 2607 2608 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2609 SourceLocation TypeidLoc, 2610 TypeSourceInfo *Operand, 2611 SourceLocation RParenLoc); 2612 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2613 SourceLocation TypeidLoc, 2614 Expr *Operand, 2615 SourceLocation RParenLoc); 2616 2617 /// ActOnCXXUuidof - Parse __uuidof( something ). 2618 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2619 SourceLocation LParenLoc, bool isType, 2620 void *TyOrExpr, 2621 SourceLocation RParenLoc); 2622 2623 2624 //// ActOnCXXThis - Parse 'this' pointer. 2625 ExprResult ActOnCXXThis(SourceLocation loc); 2626 2627 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2628 /// pointer to an instance method whose 'this' pointer is 2629 /// capturable, or null if this is not possible. 2630 CXXMethodDecl *tryCaptureCXXThis(); 2631 2632 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2633 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2634 2635 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2636 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2637 2638 //// ActOnCXXThrow - Parse throw expressions. 2639 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2640 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2641 2642 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2643 /// Can be interpreted either as function-style casting ("int(x)") 2644 /// or class type construction ("ClassType(x,y,z)") 2645 /// or creation of a value-initialized type ("int()"). 2646 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2647 SourceLocation LParenLoc, 2648 MultiExprArg Exprs, 2649 SourceLocation RParenLoc); 2650 2651 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2652 SourceLocation LParenLoc, 2653 MultiExprArg Exprs, 2654 SourceLocation RParenLoc); 2655 2656 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2657 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2658 SourceLocation PlacementLParen, 2659 MultiExprArg PlacementArgs, 2660 SourceLocation PlacementRParen, 2661 SourceRange TypeIdParens, Declarator &D, 2662 SourceLocation ConstructorLParen, 2663 MultiExprArg ConstructorArgs, 2664 SourceLocation ConstructorRParen); 2665 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2666 SourceLocation PlacementLParen, 2667 MultiExprArg PlacementArgs, 2668 SourceLocation PlacementRParen, 2669 SourceRange TypeIdParens, 2670 QualType AllocType, 2671 TypeSourceInfo *AllocTypeInfo, 2672 Expr *ArraySize, 2673 SourceLocation ConstructorLParen, 2674 MultiExprArg ConstructorArgs, 2675 SourceLocation ConstructorRParen, 2676 bool TypeMayContainAuto = true); 2677 2678 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2679 SourceRange R); 2680 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2681 bool UseGlobal, QualType AllocType, bool IsArray, 2682 Expr **PlaceArgs, unsigned NumPlaceArgs, 2683 FunctionDecl *&OperatorNew, 2684 FunctionDecl *&OperatorDelete); 2685 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2686 DeclarationName Name, Expr** Args, 2687 unsigned NumArgs, DeclContext *Ctx, 2688 bool AllowMissing, FunctionDecl *&Operator); 2689 void DeclareGlobalNewDelete(); 2690 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2691 QualType Argument, 2692 bool addMallocAttr = false); 2693 2694 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2695 DeclarationName Name, FunctionDecl* &Operator); 2696 2697 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2698 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2699 bool UseGlobal, bool ArrayForm, 2700 Expr *Operand); 2701 2702 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2703 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2704 SourceLocation StmtLoc, 2705 bool ConvertToBoolean); 2706 2707 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2708 Expr *Operand, SourceLocation RParen); 2709 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2710 SourceLocation RParen); 2711 2712 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2713 /// pseudo-functions. 2714 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2715 SourceLocation KWLoc, 2716 ParsedType Ty, 2717 SourceLocation RParen); 2718 2719 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2720 SourceLocation KWLoc, 2721 TypeSourceInfo *T, 2722 SourceLocation RParen); 2723 2724 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2725 /// pseudo-functions. 2726 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2727 SourceLocation KWLoc, 2728 ParsedType LhsTy, 2729 ParsedType RhsTy, 2730 SourceLocation RParen); 2731 2732 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2733 SourceLocation KWLoc, 2734 TypeSourceInfo *LhsT, 2735 TypeSourceInfo *RhsT, 2736 SourceLocation RParen); 2737 2738 /// ActOnExpressionTrait - Parsed one of the unary type trait support 2739 /// pseudo-functions. 2740 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 2741 SourceLocation KWLoc, 2742 Expr *Queried, 2743 SourceLocation RParen); 2744 2745 ExprResult BuildExpressionTrait(ExpressionTrait OET, 2746 SourceLocation KWLoc, 2747 Expr *Queried, 2748 SourceLocation RParen); 2749 2750 ExprResult ActOnStartCXXMemberReference(Scope *S, 2751 Expr *Base, 2752 SourceLocation OpLoc, 2753 tok::TokenKind OpKind, 2754 ParsedType &ObjectType, 2755 bool &MayBePseudoDestructor); 2756 2757 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2758 2759 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2760 SourceLocation OpLoc, 2761 tok::TokenKind OpKind, 2762 const CXXScopeSpec &SS, 2763 TypeSourceInfo *ScopeType, 2764 SourceLocation CCLoc, 2765 SourceLocation TildeLoc, 2766 PseudoDestructorTypeStorage DestroyedType, 2767 bool HasTrailingLParen); 2768 2769 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2770 SourceLocation OpLoc, 2771 tok::TokenKind OpKind, 2772 CXXScopeSpec &SS, 2773 UnqualifiedId &FirstTypeName, 2774 SourceLocation CCLoc, 2775 SourceLocation TildeLoc, 2776 UnqualifiedId &SecondTypeName, 2777 bool HasTrailingLParen); 2778 2779 /// MaybeCreateExprWithCleanups - If the current full-expression 2780 /// requires any cleanups, surround it with a ExprWithCleanups node. 2781 /// Otherwise, just returns the passed-in expression. 2782 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2783 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2784 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2785 2786 ExprResult ActOnFinishFullExpr(Expr *Expr); 2787 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2788 2789 // Marks SS invalid if it represents an incomplete type. 2790 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2791 2792 DeclContext *computeDeclContext(QualType T); 2793 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2794 bool EnteringContext = false); 2795 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2796 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2797 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2798 2799 /// \brief The parser has parsed a global nested-name-specifier '::'. 2800 /// 2801 /// \param S The scope in which this nested-name-specifier occurs. 2802 /// 2803 /// \param CCLoc The location of the '::'. 2804 /// 2805 /// \param SS The nested-name-specifier, which will be updated in-place 2806 /// to reflect the parsed nested-name-specifier. 2807 /// 2808 /// \returns true if an error occurred, false otherwise. 2809 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2810 CXXScopeSpec &SS); 2811 2812 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2813 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2814 2815 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2816 SourceLocation IdLoc, 2817 IdentifierInfo &II, 2818 ParsedType ObjectType); 2819 2820 bool BuildCXXNestedNameSpecifier(Scope *S, 2821 IdentifierInfo &Identifier, 2822 SourceLocation IdentifierLoc, 2823 SourceLocation CCLoc, 2824 QualType ObjectType, 2825 bool EnteringContext, 2826 CXXScopeSpec &SS, 2827 NamedDecl *ScopeLookupResult, 2828 bool ErrorRecoveryLookup); 2829 2830 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2831 /// 2832 /// \param S The scope in which this nested-name-specifier occurs. 2833 /// 2834 /// \param Identifier The identifier preceding the '::'. 2835 /// 2836 /// \param IdentifierLoc The location of the identifier. 2837 /// 2838 /// \param CCLoc The location of the '::'. 2839 /// 2840 /// \param ObjectType The type of the object, if we're parsing 2841 /// nested-name-specifier in a member access expression. 2842 /// 2843 /// \param EnteringContext Whether we're entering the context nominated by 2844 /// this nested-name-specifier. 2845 /// 2846 /// \param SS The nested-name-specifier, which is both an input 2847 /// parameter (the nested-name-specifier before this type) and an 2848 /// output parameter (containing the full nested-name-specifier, 2849 /// including this new type). 2850 /// 2851 /// \returns true if an error occurred, false otherwise. 2852 bool ActOnCXXNestedNameSpecifier(Scope *S, 2853 IdentifierInfo &Identifier, 2854 SourceLocation IdentifierLoc, 2855 SourceLocation CCLoc, 2856 ParsedType ObjectType, 2857 bool EnteringContext, 2858 CXXScopeSpec &SS); 2859 2860 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2861 IdentifierInfo &Identifier, 2862 SourceLocation IdentifierLoc, 2863 SourceLocation ColonLoc, 2864 ParsedType ObjectType, 2865 bool EnteringContext); 2866 2867 /// \brief The parser has parsed a nested-name-specifier 2868 /// 'template[opt] template-name < template-args >::'. 2869 /// 2870 /// \param S The scope in which this nested-name-specifier occurs. 2871 /// 2872 /// \param TemplateLoc The location of the 'template' keyword, if any. 2873 /// 2874 /// \param SS The nested-name-specifier, which is both an input 2875 /// parameter (the nested-name-specifier before this type) and an 2876 /// output parameter (containing the full nested-name-specifier, 2877 /// including this new type). 2878 /// 2879 /// \param TemplateLoc the location of the 'template' keyword, if any. 2880 /// \param TemplateName The template name. 2881 /// \param TemplateNameLoc The location of the template name. 2882 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2883 /// \param TemplateArgs The template arguments. 2884 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2885 /// \param CCLoc The location of the '::'. 2886 2887 /// \param EnteringContext Whether we're entering the context of the 2888 /// nested-name-specifier. 2889 /// 2890 /// 2891 /// \returns true if an error occurred, false otherwise. 2892 bool ActOnCXXNestedNameSpecifier(Scope *S, 2893 SourceLocation TemplateLoc, 2894 CXXScopeSpec &SS, 2895 TemplateTy Template, 2896 SourceLocation TemplateNameLoc, 2897 SourceLocation LAngleLoc, 2898 ASTTemplateArgsPtr TemplateArgs, 2899 SourceLocation RAngleLoc, 2900 SourceLocation CCLoc, 2901 bool EnteringContext); 2902 2903 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2904 /// that the parser can use later to reconstruct the given 2905 /// nested-name-specifier. 2906 /// 2907 /// \param SS A nested-name-specifier. 2908 /// 2909 /// \returns A pointer containing all of the information in the 2910 /// nested-name-specifier \p SS. 2911 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2912 2913 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2914 /// the nested-name-specifier structure. 2915 /// 2916 /// \param Annotation The annotation pointer, produced by 2917 /// \c SaveNestedNameSpecifierAnnotation(). 2918 /// 2919 /// \param AnnotationRange The source range corresponding to the annotation. 2920 /// 2921 /// \param SS The nested-name-specifier that will be updated with the contents 2922 /// of the annotation pointer. 2923 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2924 SourceRange AnnotationRange, 2925 CXXScopeSpec &SS); 2926 2927 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2928 2929 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2930 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2931 /// After this method is called, according to [C++ 3.4.3p3], names should be 2932 /// looked up in the declarator-id's scope, until the declarator is parsed and 2933 /// ActOnCXXExitDeclaratorScope is called. 2934 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2935 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2936 2937 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2938 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2939 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2940 /// Used to indicate that names should revert to being looked up in the 2941 /// defining scope. 2942 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2943 2944 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2945 /// initializer for the declaration 'Dcl'. 2946 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2947 /// static data member of class X, names should be looked up in the scope of 2948 /// class X. 2949 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2950 2951 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2952 /// initializer for the declaration 'Dcl'. 2953 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2954 2955 // ParseObjCStringLiteral - Parse Objective-C string literals. 2956 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2957 Expr **Strings, 2958 unsigned NumStrings); 2959 2960 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2961 TypeSourceInfo *EncodedTypeInfo, 2962 SourceLocation RParenLoc); 2963 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2964 CXXMethodDecl *Method); 2965 2966 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2967 SourceLocation EncodeLoc, 2968 SourceLocation LParenLoc, 2969 ParsedType Ty, 2970 SourceLocation RParenLoc); 2971 2972 // ParseObjCSelectorExpression - Build selector expression for @selector 2973 ExprResult ParseObjCSelectorExpression(Selector Sel, 2974 SourceLocation AtLoc, 2975 SourceLocation SelLoc, 2976 SourceLocation LParenLoc, 2977 SourceLocation RParenLoc); 2978 2979 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2980 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2981 SourceLocation AtLoc, 2982 SourceLocation ProtoLoc, 2983 SourceLocation LParenLoc, 2984 SourceLocation RParenLoc); 2985 2986 //===--------------------------------------------------------------------===// 2987 // C++ Declarations 2988 // 2989 Decl *ActOnStartLinkageSpecification(Scope *S, 2990 SourceLocation ExternLoc, 2991 SourceLocation LangLoc, 2992 llvm::StringRef Lang, 2993 SourceLocation LBraceLoc); 2994 Decl *ActOnFinishLinkageSpecification(Scope *S, 2995 Decl *LinkageSpec, 2996 SourceLocation RBraceLoc); 2997 2998 2999 //===--------------------------------------------------------------------===// 3000 // C++ Classes 3001 // 3002 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3003 const CXXScopeSpec *SS = 0); 3004 3005 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3006 SourceLocation ASLoc, 3007 SourceLocation ColonLoc); 3008 3009 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3010 Declarator &D, 3011 MultiTemplateParamsArg TemplateParameterLists, 3012 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3013 Expr *Init, bool IsDefinition, 3014 bool Deleted = false); 3015 3016 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3017 Scope *S, 3018 CXXScopeSpec &SS, 3019 IdentifierInfo *MemberOrBase, 3020 ParsedType TemplateTypeTy, 3021 SourceLocation IdLoc, 3022 SourceLocation LParenLoc, 3023 Expr **Args, unsigned NumArgs, 3024 SourceLocation RParenLoc, 3025 SourceLocation EllipsisLoc); 3026 3027 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3028 unsigned NumArgs, SourceLocation IdLoc, 3029 SourceLocation LParenLoc, 3030 SourceLocation RParenLoc); 3031 3032 MemInitResult BuildBaseInitializer(QualType BaseType, 3033 TypeSourceInfo *BaseTInfo, 3034 Expr **Args, unsigned NumArgs, 3035 SourceLocation LParenLoc, 3036 SourceLocation RParenLoc, 3037 CXXRecordDecl *ClassDecl, 3038 SourceLocation EllipsisLoc); 3039 3040 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3041 Expr **Args, unsigned NumArgs, 3042 SourceLocation BaseLoc, 3043 SourceLocation RParenLoc, 3044 SourceLocation LParenLoc, 3045 CXXRecordDecl *ClassDecl); 3046 3047 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3048 CXXCtorInitializer **Initializers, 3049 unsigned NumInitializers, bool AnyErrors); 3050 3051 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3052 3053 3054 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3055 /// mark all the non-trivial destructors of its members and bases as 3056 /// referenced. 3057 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3058 CXXRecordDecl *Record); 3059 3060 /// \brief The list of classes whose vtables have been used within 3061 /// this translation unit, and the source locations at which the 3062 /// first use occurred. 3063 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3064 3065 /// \brief The list of vtables that are required but have not yet been 3066 /// materialized. 3067 llvm::SmallVector<VTableUse, 16> VTableUses; 3068 3069 /// \brief The set of classes whose vtables have been used within 3070 /// this translation unit, and a bit that will be true if the vtable is 3071 /// required to be emitted (otherwise, it should be emitted only if needed 3072 /// by code generation). 3073 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3074 3075 /// \brief A list of all of the dynamic classes in this translation 3076 /// unit. 3077 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3078 3079 /// \brief Note that the vtable for the given class was used at the 3080 /// given location. 3081 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3082 bool DefinitionRequired = false); 3083 3084 /// MarkVirtualMembersReferenced - Will mark all members of the given 3085 /// CXXRecordDecl referenced. 3086 void MarkVirtualMembersReferenced(SourceLocation Loc, 3087 const CXXRecordDecl *RD); 3088 3089 /// \brief Define all of the vtables that have been used in this 3090 /// translation unit and reference any virtual members used by those 3091 /// vtables. 3092 /// 3093 /// \returns true if any work was done, false otherwise. 3094 bool DefineUsedVTables(); 3095 3096 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3097 3098 void ActOnMemInitializers(Decl *ConstructorDecl, 3099 SourceLocation ColonLoc, 3100 MemInitTy **MemInits, unsigned NumMemInits, 3101 bool AnyErrors); 3102 3103 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3104 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3105 Decl *TagDecl, 3106 SourceLocation LBrac, 3107 SourceLocation RBrac, 3108 AttributeList *AttrList); 3109 3110 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3111 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3112 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3113 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3114 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3115 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3116 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3117 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3118 bool IsInsideALocalClassWithinATemplateFunction(); 3119 3120 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3121 Expr *AssertExpr, 3122 Expr *AssertMessageExpr, 3123 SourceLocation RParenLoc); 3124 3125 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3126 TypeSourceInfo *TSInfo); 3127 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3128 MultiTemplateParamsArg TemplateParams); 3129 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3130 MultiTemplateParamsArg TemplateParams); 3131 3132 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3133 StorageClass& SC); 3134 void CheckConstructor(CXXConstructorDecl *Constructor); 3135 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3136 StorageClass& SC); 3137 bool CheckDestructor(CXXDestructorDecl *Destructor); 3138 void CheckConversionDeclarator(Declarator &D, QualType &R, 3139 StorageClass& SC); 3140 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3141 3142 //===--------------------------------------------------------------------===// 3143 // C++ Derived Classes 3144 // 3145 3146 /// ActOnBaseSpecifier - Parsed a base specifier 3147 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3148 SourceRange SpecifierRange, 3149 bool Virtual, AccessSpecifier Access, 3150 TypeSourceInfo *TInfo, 3151 SourceLocation EllipsisLoc); 3152 3153 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3154 SourceRange SpecifierRange, 3155 bool Virtual, AccessSpecifier Access, 3156 ParsedType basetype, 3157 SourceLocation BaseLoc, 3158 SourceLocation EllipsisLoc); 3159 3160 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3161 unsigned NumBases); 3162 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3163 3164 bool IsDerivedFrom(QualType Derived, QualType Base); 3165 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3166 3167 // FIXME: I don't like this name. 3168 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3169 3170 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3171 3172 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3173 SourceLocation Loc, SourceRange Range, 3174 CXXCastPath *BasePath = 0, 3175 bool IgnoreAccess = false); 3176 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3177 unsigned InaccessibleBaseID, 3178 unsigned AmbigiousBaseConvID, 3179 SourceLocation Loc, SourceRange Range, 3180 DeclarationName Name, 3181 CXXCastPath *BasePath); 3182 3183 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3184 3185 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3186 /// covariant, according to C++ [class.virtual]p5. 3187 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3188 const CXXMethodDecl *Old); 3189 3190 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3191 /// spec is a subset of base spec. 3192 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3193 const CXXMethodDecl *Old); 3194 3195 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3196 3197 /// CheckOverrideControl - Check C++0x override control semantics. 3198 void CheckOverrideControl(const Decl *D); 3199 3200 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3201 /// overrides a virtual member function marked 'final', according to 3202 /// C++0x [class.virtual]p3. 3203 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3204 const CXXMethodDecl *Old); 3205 3206 3207 //===--------------------------------------------------------------------===// 3208 // C++ Access Control 3209 // 3210 3211 enum AccessResult { 3212 AR_accessible, 3213 AR_inaccessible, 3214 AR_dependent, 3215 AR_delayed 3216 }; 3217 3218 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3219 NamedDecl *PrevMemberDecl, 3220 AccessSpecifier LexicalAS); 3221 3222 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3223 DeclAccessPair FoundDecl); 3224 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3225 DeclAccessPair FoundDecl); 3226 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3227 SourceRange PlacementRange, 3228 CXXRecordDecl *NamingClass, 3229 DeclAccessPair FoundDecl); 3230 AccessResult CheckConstructorAccess(SourceLocation Loc, 3231 CXXConstructorDecl *D, 3232 const InitializedEntity &Entity, 3233 AccessSpecifier Access, 3234 bool IsCopyBindingRefToTemp = false); 3235 AccessResult CheckDestructorAccess(SourceLocation Loc, 3236 CXXDestructorDecl *Dtor, 3237 const PartialDiagnostic &PDiag); 3238 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3239 NamedDecl *D, 3240 const PartialDiagnostic &PDiag); 3241 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3242 Expr *ObjectExpr, 3243 Expr *ArgExpr, 3244 DeclAccessPair FoundDecl); 3245 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3246 DeclAccessPair FoundDecl); 3247 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3248 QualType Base, QualType Derived, 3249 const CXXBasePath &Path, 3250 unsigned DiagID, 3251 bool ForceCheck = false, 3252 bool ForceUnprivileged = false); 3253 void CheckLookupAccess(const LookupResult &R); 3254 3255 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3256 const MultiLevelTemplateArgumentList &TemplateArgs); 3257 void PerformDependentDiagnostics(const DeclContext *Pattern, 3258 const MultiLevelTemplateArgumentList &TemplateArgs); 3259 3260 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3261 3262 /// A flag to suppress access checking. 3263 bool SuppressAccessChecking; 3264 3265 /// \brief When true, access checking violations are treated as SFINAE 3266 /// failures rather than hard errors. 3267 bool AccessCheckingSFINAE; 3268 3269 void ActOnStartSuppressingAccessChecks(); 3270 void ActOnStopSuppressingAccessChecks(); 3271 3272 enum AbstractDiagSelID { 3273 AbstractNone = -1, 3274 AbstractReturnType, 3275 AbstractParamType, 3276 AbstractVariableType, 3277 AbstractFieldType, 3278 AbstractArrayType 3279 }; 3280 3281 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3282 const PartialDiagnostic &PD); 3283 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3284 3285 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3286 AbstractDiagSelID SelID = AbstractNone); 3287 3288 //===--------------------------------------------------------------------===// 3289 // C++ Overloaded Operators [C++ 13.5] 3290 // 3291 3292 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3293 3294 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3295 3296 //===--------------------------------------------------------------------===// 3297 // C++ Templates [C++ 14] 3298 // 3299 void FilterAcceptableTemplateNames(LookupResult &R); 3300 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3301 3302 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3303 QualType ObjectType, bool EnteringContext, 3304 bool &MemberOfUnknownSpecialization); 3305 3306 TemplateNameKind isTemplateName(Scope *S, 3307 CXXScopeSpec &SS, 3308 bool hasTemplateKeyword, 3309 UnqualifiedId &Name, 3310 ParsedType ObjectType, 3311 bool EnteringContext, 3312 TemplateTy &Template, 3313 bool &MemberOfUnknownSpecialization); 3314 3315 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3316 SourceLocation IILoc, 3317 Scope *S, 3318 const CXXScopeSpec *SS, 3319 TemplateTy &SuggestedTemplate, 3320 TemplateNameKind &SuggestedKind); 3321 3322 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3323 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3324 3325 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3326 SourceLocation EllipsisLoc, 3327 SourceLocation KeyLoc, 3328 IdentifierInfo *ParamName, 3329 SourceLocation ParamNameLoc, 3330 unsigned Depth, unsigned Position, 3331 SourceLocation EqualLoc, 3332 ParsedType DefaultArg); 3333 3334 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3335 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3336 unsigned Depth, 3337 unsigned Position, 3338 SourceLocation EqualLoc, 3339 Expr *DefaultArg); 3340 Decl *ActOnTemplateTemplateParameter(Scope *S, 3341 SourceLocation TmpLoc, 3342 TemplateParamsTy *Params, 3343 SourceLocation EllipsisLoc, 3344 IdentifierInfo *ParamName, 3345 SourceLocation ParamNameLoc, 3346 unsigned Depth, 3347 unsigned Position, 3348 SourceLocation EqualLoc, 3349 ParsedTemplateArgument DefaultArg); 3350 3351 TemplateParamsTy * 3352 ActOnTemplateParameterList(unsigned Depth, 3353 SourceLocation ExportLoc, 3354 SourceLocation TemplateLoc, 3355 SourceLocation LAngleLoc, 3356 Decl **Params, unsigned NumParams, 3357 SourceLocation RAngleLoc); 3358 3359 /// \brief The context in which we are checking a template parameter 3360 /// list. 3361 enum TemplateParamListContext { 3362 TPC_ClassTemplate, 3363 TPC_FunctionTemplate, 3364 TPC_ClassTemplateMember, 3365 TPC_FriendFunctionTemplate, 3366 TPC_FriendFunctionTemplateDefinition 3367 }; 3368 3369 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3370 TemplateParameterList *OldParams, 3371 TemplateParamListContext TPC); 3372 TemplateParameterList * 3373 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3374 const CXXScopeSpec &SS, 3375 TemplateParameterList **ParamLists, 3376 unsigned NumParamLists, 3377 bool IsFriend, 3378 bool &IsExplicitSpecialization, 3379 bool &Invalid); 3380 3381 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3382 SourceLocation KWLoc, CXXScopeSpec &SS, 3383 IdentifierInfo *Name, SourceLocation NameLoc, 3384 AttributeList *Attr, 3385 TemplateParameterList *TemplateParams, 3386 AccessSpecifier AS, 3387 unsigned NumOuterTemplateParamLists, 3388 TemplateParameterList **OuterTemplateParamLists); 3389 3390 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3391 TemplateArgumentListInfo &Out); 3392 3393 void NoteAllFoundTemplates(TemplateName Name); 3394 3395 QualType CheckTemplateIdType(TemplateName Template, 3396 SourceLocation TemplateLoc, 3397 TemplateArgumentListInfo &TemplateArgs); 3398 3399 TypeResult 3400 ActOnTemplateIdType(CXXScopeSpec &SS, 3401 TemplateTy Template, SourceLocation TemplateLoc, 3402 SourceLocation LAngleLoc, 3403 ASTTemplateArgsPtr TemplateArgs, 3404 SourceLocation RAngleLoc); 3405 3406 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3407 /// such as \c class T::template apply<U>. 3408 /// 3409 /// \param TUK 3410 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3411 TypeSpecifierType TagSpec, 3412 SourceLocation TagLoc, 3413 CXXScopeSpec &SS, 3414 TemplateTy TemplateD, 3415 SourceLocation TemplateLoc, 3416 SourceLocation LAngleLoc, 3417 ASTTemplateArgsPtr TemplateArgsIn, 3418 SourceLocation RAngleLoc); 3419 3420 3421 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3422 LookupResult &R, 3423 bool RequiresADL, 3424 const TemplateArgumentListInfo &TemplateArgs); 3425 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3426 const DeclarationNameInfo &NameInfo, 3427 const TemplateArgumentListInfo &TemplateArgs); 3428 3429 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3430 SourceLocation TemplateKWLoc, 3431 CXXScopeSpec &SS, 3432 UnqualifiedId &Name, 3433 ParsedType ObjectType, 3434 bool EnteringContext, 3435 TemplateTy &Template); 3436 3437 DeclResult 3438 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3439 SourceLocation KWLoc, 3440 CXXScopeSpec &SS, 3441 TemplateTy Template, 3442 SourceLocation TemplateNameLoc, 3443 SourceLocation LAngleLoc, 3444 ASTTemplateArgsPtr TemplateArgs, 3445 SourceLocation RAngleLoc, 3446 AttributeList *Attr, 3447 MultiTemplateParamsArg TemplateParameterLists); 3448 3449 Decl *ActOnTemplateDeclarator(Scope *S, 3450 MultiTemplateParamsArg TemplateParameterLists, 3451 Declarator &D); 3452 3453 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3454 MultiTemplateParamsArg TemplateParameterLists, 3455 Declarator &D); 3456 3457 bool 3458 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3459 TemplateSpecializationKind NewTSK, 3460 NamedDecl *PrevDecl, 3461 TemplateSpecializationKind PrevTSK, 3462 SourceLocation PrevPtOfInstantiation, 3463 bool &SuppressNew); 3464 3465 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3466 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3467 LookupResult &Previous); 3468 3469 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3470 TemplateArgumentListInfo *ExplicitTemplateArgs, 3471 LookupResult &Previous); 3472 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3473 3474 DeclResult 3475 ActOnExplicitInstantiation(Scope *S, 3476 SourceLocation ExternLoc, 3477 SourceLocation TemplateLoc, 3478 unsigned TagSpec, 3479 SourceLocation KWLoc, 3480 const CXXScopeSpec &SS, 3481 TemplateTy Template, 3482 SourceLocation TemplateNameLoc, 3483 SourceLocation LAngleLoc, 3484 ASTTemplateArgsPtr TemplateArgs, 3485 SourceLocation RAngleLoc, 3486 AttributeList *Attr); 3487 3488 DeclResult 3489 ActOnExplicitInstantiation(Scope *S, 3490 SourceLocation ExternLoc, 3491 SourceLocation TemplateLoc, 3492 unsigned TagSpec, 3493 SourceLocation KWLoc, 3494 CXXScopeSpec &SS, 3495 IdentifierInfo *Name, 3496 SourceLocation NameLoc, 3497 AttributeList *Attr); 3498 3499 DeclResult ActOnExplicitInstantiation(Scope *S, 3500 SourceLocation ExternLoc, 3501 SourceLocation TemplateLoc, 3502 Declarator &D); 3503 3504 TemplateArgumentLoc 3505 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3506 SourceLocation TemplateLoc, 3507 SourceLocation RAngleLoc, 3508 Decl *Param, 3509 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3510 3511 /// \brief Specifies the context in which a particular template 3512 /// argument is being checked. 3513 enum CheckTemplateArgumentKind { 3514 /// \brief The template argument was specified in the code or was 3515 /// instantiated with some deduced template arguments. 3516 CTAK_Specified, 3517 3518 /// \brief The template argument was deduced via template argument 3519 /// deduction. 3520 CTAK_Deduced, 3521 3522 /// \brief The template argument was deduced from an array bound 3523 /// via template argument deduction. 3524 CTAK_DeducedFromArrayBound 3525 }; 3526 3527 bool CheckTemplateArgument(NamedDecl *Param, 3528 const TemplateArgumentLoc &Arg, 3529 NamedDecl *Template, 3530 SourceLocation TemplateLoc, 3531 SourceLocation RAngleLoc, 3532 unsigned ArgumentPackIndex, 3533 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3534 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3535 3536 /// \brief Check that the given template arguments can be be provided to 3537 /// the given template, converting the arguments along the way. 3538 /// 3539 /// \param Template The template to which the template arguments are being 3540 /// provided. 3541 /// 3542 /// \param TemplateLoc The location of the template name in the source. 3543 /// 3544 /// \param TemplateArgs The list of template arguments. If the template is 3545 /// a template template parameter, this function may extend the set of 3546 /// template arguments to also include substituted, defaulted template 3547 /// arguments. 3548 /// 3549 /// \param PartialTemplateArgs True if the list of template arguments is 3550 /// intentionally partial, e.g., because we're checking just the initial 3551 /// set of template arguments. 3552 /// 3553 /// \param Converted Will receive the converted, canonicalized template 3554 /// arguments. 3555 /// 3556 /// \returns True if an error occurred, false otherwise. 3557 bool CheckTemplateArgumentList(TemplateDecl *Template, 3558 SourceLocation TemplateLoc, 3559 TemplateArgumentListInfo &TemplateArgs, 3560 bool PartialTemplateArgs, 3561 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3562 3563 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3564 const TemplateArgumentLoc &Arg, 3565 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3566 3567 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3568 TypeSourceInfo *Arg); 3569 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3570 TemplateArgument &Converted); 3571 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3572 QualType InstantiatedParamType, Expr *Arg, 3573 TemplateArgument &Converted, 3574 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3575 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3576 const TemplateArgumentLoc &Arg); 3577 3578 ExprResult 3579 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3580 QualType ParamType, 3581 SourceLocation Loc); 3582 ExprResult 3583 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3584 SourceLocation Loc); 3585 3586 /// \brief Enumeration describing how template parameter lists are compared 3587 /// for equality. 3588 enum TemplateParameterListEqualKind { 3589 /// \brief We are matching the template parameter lists of two templates 3590 /// that might be redeclarations. 3591 /// 3592 /// \code 3593 /// template<typename T> struct X; 3594 /// template<typename T> struct X; 3595 /// \endcode 3596 TPL_TemplateMatch, 3597 3598 /// \brief We are matching the template parameter lists of two template 3599 /// template parameters as part of matching the template parameter lists 3600 /// of two templates that might be redeclarations. 3601 /// 3602 /// \code 3603 /// template<template<int I> class TT> struct X; 3604 /// template<template<int Value> class Other> struct X; 3605 /// \endcode 3606 TPL_TemplateTemplateParmMatch, 3607 3608 /// \brief We are matching the template parameter lists of a template 3609 /// template argument against the template parameter lists of a template 3610 /// template parameter. 3611 /// 3612 /// \code 3613 /// template<template<int Value> class Metafun> struct X; 3614 /// template<int Value> struct integer_c; 3615 /// X<integer_c> xic; 3616 /// \endcode 3617 TPL_TemplateTemplateArgumentMatch 3618 }; 3619 3620 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3621 TemplateParameterList *Old, 3622 bool Complain, 3623 TemplateParameterListEqualKind Kind, 3624 SourceLocation TemplateArgLoc 3625 = SourceLocation()); 3626 3627 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3628 3629 /// \brief Called when the parser has parsed a C++ typename 3630 /// specifier, e.g., "typename T::type". 3631 /// 3632 /// \param S The scope in which this typename type occurs. 3633 /// \param TypenameLoc the location of the 'typename' keyword 3634 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3635 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3636 /// \param IdLoc the location of the identifier. 3637 TypeResult 3638 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3639 const CXXScopeSpec &SS, const IdentifierInfo &II, 3640 SourceLocation IdLoc); 3641 3642 /// \brief Called when the parser has parsed a C++ typename 3643 /// specifier that ends in a template-id, e.g., 3644 /// "typename MetaFun::template apply<T1, T2>". 3645 /// 3646 /// \param S The scope in which this typename type occurs. 3647 /// \param TypenameLoc the location of the 'typename' keyword 3648 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3649 /// \param TemplateLoc the location of the 'template' keyword, if any. 3650 /// \param TemplateName The template name. 3651 /// \param TemplateNameLoc The location of the template name. 3652 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3653 /// \param TemplateArgs The template arguments. 3654 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3655 TypeResult 3656 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3657 const CXXScopeSpec &SS, 3658 SourceLocation TemplateLoc, 3659 TemplateTy Template, 3660 SourceLocation TemplateNameLoc, 3661 SourceLocation LAngleLoc, 3662 ASTTemplateArgsPtr TemplateArgs, 3663 SourceLocation RAngleLoc); 3664 3665 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3666 SourceLocation KeywordLoc, 3667 NestedNameSpecifierLoc QualifierLoc, 3668 const IdentifierInfo &II, 3669 SourceLocation IILoc); 3670 3671 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3672 SourceLocation Loc, 3673 DeclarationName Name); 3674 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3675 3676 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3677 3678 std::string 3679 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3680 const TemplateArgumentList &Args); 3681 3682 std::string 3683 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3684 const TemplateArgument *Args, 3685 unsigned NumArgs); 3686 3687 //===--------------------------------------------------------------------===// 3688 // C++ Variadic Templates (C++0x [temp.variadic]) 3689 //===--------------------------------------------------------------------===// 3690 3691 /// \brief The context in which an unexpanded parameter pack is 3692 /// being diagnosed. 3693 /// 3694 /// Note that the values of this enumeration line up with the first 3695 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3696 enum UnexpandedParameterPackContext { 3697 /// \brief An arbitrary expression. 3698 UPPC_Expression = 0, 3699 3700 /// \brief The base type of a class type. 3701 UPPC_BaseType, 3702 3703 /// \brief The type of an arbitrary declaration. 3704 UPPC_DeclarationType, 3705 3706 /// \brief The type of a data member. 3707 UPPC_DataMemberType, 3708 3709 /// \brief The size of a bit-field. 3710 UPPC_BitFieldWidth, 3711 3712 /// \brief The expression in a static assertion. 3713 UPPC_StaticAssertExpression, 3714 3715 /// \brief The fixed underlying type of an enumeration. 3716 UPPC_FixedUnderlyingType, 3717 3718 /// \brief The enumerator value. 3719 UPPC_EnumeratorValue, 3720 3721 /// \brief A using declaration. 3722 UPPC_UsingDeclaration, 3723 3724 /// \brief A friend declaration. 3725 UPPC_FriendDeclaration, 3726 3727 /// \brief A declaration qualifier. 3728 UPPC_DeclarationQualifier, 3729 3730 /// \brief An initializer. 3731 UPPC_Initializer, 3732 3733 /// \brief A default argument. 3734 UPPC_DefaultArgument, 3735 3736 /// \brief The type of a non-type template parameter. 3737 UPPC_NonTypeTemplateParameterType, 3738 3739 /// \brief The type of an exception. 3740 UPPC_ExceptionType, 3741 3742 /// \brief Partial specialization. 3743 UPPC_PartialSpecialization 3744 }; 3745 3746 /// \brief If the given type contains an unexpanded parameter pack, 3747 /// diagnose the error. 3748 /// 3749 /// \param Loc The source location where a diagnostc should be emitted. 3750 /// 3751 /// \param T The type that is being checked for unexpanded parameter 3752 /// packs. 3753 /// 3754 /// \returns true if an error occurred, false otherwise. 3755 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3756 UnexpandedParameterPackContext UPPC); 3757 3758 /// \brief If the given expression contains an unexpanded parameter 3759 /// pack, diagnose the error. 3760 /// 3761 /// \param E The expression that is being checked for unexpanded 3762 /// parameter packs. 3763 /// 3764 /// \returns true if an error occurred, false otherwise. 3765 bool DiagnoseUnexpandedParameterPack(Expr *E, 3766 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3767 3768 /// \brief If the given nested-name-specifier contains an unexpanded 3769 /// parameter pack, diagnose the error. 3770 /// 3771 /// \param SS The nested-name-specifier that is being checked for 3772 /// unexpanded parameter packs. 3773 /// 3774 /// \returns true if an error occurred, false otherwise. 3775 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3776 UnexpandedParameterPackContext UPPC); 3777 3778 /// \brief If the given name contains an unexpanded parameter pack, 3779 /// diagnose the error. 3780 /// 3781 /// \param NameInfo The name (with source location information) that 3782 /// is being checked for unexpanded parameter packs. 3783 /// 3784 /// \returns true if an error occurred, false otherwise. 3785 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3786 UnexpandedParameterPackContext UPPC); 3787 3788 /// \brief If the given template name contains an unexpanded parameter pack, 3789 /// diagnose the error. 3790 /// 3791 /// \param Loc The location of the template name. 3792 /// 3793 /// \param Template The template name that is being checked for unexpanded 3794 /// parameter packs. 3795 /// 3796 /// \returns true if an error occurred, false otherwise. 3797 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3798 TemplateName Template, 3799 UnexpandedParameterPackContext UPPC); 3800 3801 /// \brief If the given template argument contains an unexpanded parameter 3802 /// pack, diagnose the error. 3803 /// 3804 /// \param Arg The template argument that is being checked for unexpanded 3805 /// parameter packs. 3806 /// 3807 /// \returns true if an error occurred, false otherwise. 3808 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3809 UnexpandedParameterPackContext UPPC); 3810 3811 /// \brief Collect the set of unexpanded parameter packs within the given 3812 /// template argument. 3813 /// 3814 /// \param Arg The template argument that will be traversed to find 3815 /// unexpanded parameter packs. 3816 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3817 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3818 3819 /// \brief Collect the set of unexpanded parameter packs within the given 3820 /// template argument. 3821 /// 3822 /// \param Arg The template argument that will be traversed to find 3823 /// unexpanded parameter packs. 3824 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3825 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3826 3827 /// \brief Collect the set of unexpanded parameter packs within the given 3828 /// type. 3829 /// 3830 /// \param T The type that will be traversed to find 3831 /// unexpanded parameter packs. 3832 void collectUnexpandedParameterPacks(QualType T, 3833 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3834 3835 /// \brief Collect the set of unexpanded parameter packs within the given 3836 /// type. 3837 /// 3838 /// \param TL The type that will be traversed to find 3839 /// unexpanded parameter packs. 3840 void collectUnexpandedParameterPacks(TypeLoc TL, 3841 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3842 3843 /// \brief Invoked when parsing a template argument followed by an 3844 /// ellipsis, which creates a pack expansion. 3845 /// 3846 /// \param Arg The template argument preceding the ellipsis, which 3847 /// may already be invalid. 3848 /// 3849 /// \param EllipsisLoc The location of the ellipsis. 3850 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3851 SourceLocation EllipsisLoc); 3852 3853 /// \brief Invoked when parsing a type followed by an ellipsis, which 3854 /// creates a pack expansion. 3855 /// 3856 /// \param Type The type preceding the ellipsis, which will become 3857 /// the pattern of the pack expansion. 3858 /// 3859 /// \param EllipsisLoc The location of the ellipsis. 3860 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3861 3862 /// \brief Construct a pack expansion type from the pattern of the pack 3863 /// expansion. 3864 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3865 SourceLocation EllipsisLoc, 3866 llvm::Optional<unsigned> NumExpansions); 3867 3868 /// \brief Construct a pack expansion type from the pattern of the pack 3869 /// expansion. 3870 QualType CheckPackExpansion(QualType Pattern, 3871 SourceRange PatternRange, 3872 SourceLocation EllipsisLoc, 3873 llvm::Optional<unsigned> NumExpansions); 3874 3875 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3876 /// creates a pack expansion. 3877 /// 3878 /// \param Pattern The expression preceding the ellipsis, which will become 3879 /// the pattern of the pack expansion. 3880 /// 3881 /// \param EllipsisLoc The location of the ellipsis. 3882 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3883 3884 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3885 /// creates a pack expansion. 3886 /// 3887 /// \param Pattern The expression preceding the ellipsis, which will become 3888 /// the pattern of the pack expansion. 3889 /// 3890 /// \param EllipsisLoc The location of the ellipsis. 3891 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3892 llvm::Optional<unsigned> NumExpansions); 3893 3894 /// \brief Determine whether we could expand a pack expansion with the 3895 /// given set of parameter packs into separate arguments by repeatedly 3896 /// transforming the pattern. 3897 /// 3898 /// \param EllipsisLoc The location of the ellipsis that identifies the 3899 /// pack expansion. 3900 /// 3901 /// \param PatternRange The source range that covers the entire pattern of 3902 /// the pack expansion. 3903 /// 3904 /// \param Unexpanded The set of unexpanded parameter packs within the 3905 /// pattern. 3906 /// 3907 /// \param NumUnexpanded The number of unexpanded parameter packs in 3908 /// \p Unexpanded. 3909 /// 3910 /// \param ShouldExpand Will be set to \c true if the transformer should 3911 /// expand the corresponding pack expansions into separate arguments. When 3912 /// set, \c NumExpansions must also be set. 3913 /// 3914 /// \param RetainExpansion Whether the caller should add an unexpanded 3915 /// pack expansion after all of the expanded arguments. This is used 3916 /// when extending explicitly-specified template argument packs per 3917 /// C++0x [temp.arg.explicit]p9. 3918 /// 3919 /// \param NumExpansions The number of separate arguments that will be in 3920 /// the expanded form of the corresponding pack expansion. This is both an 3921 /// input and an output parameter, which can be set by the caller if the 3922 /// number of expansions is known a priori (e.g., due to a prior substitution) 3923 /// and will be set by the callee when the number of expansions is known. 3924 /// The callee must set this value when \c ShouldExpand is \c true; it may 3925 /// set this value in other cases. 3926 /// 3927 /// \returns true if an error occurred (e.g., because the parameter packs 3928 /// are to be instantiated with arguments of different lengths), false 3929 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3930 /// must be set. 3931 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3932 SourceRange PatternRange, 3933 const UnexpandedParameterPack *Unexpanded, 3934 unsigned NumUnexpanded, 3935 const MultiLevelTemplateArgumentList &TemplateArgs, 3936 bool &ShouldExpand, 3937 bool &RetainExpansion, 3938 llvm::Optional<unsigned> &NumExpansions); 3939 3940 /// \brief Determine the number of arguments in the given pack expansion 3941 /// type. 3942 /// 3943 /// This routine already assumes that the pack expansion type can be 3944 /// expanded and that the number of arguments in the expansion is 3945 /// consistent across all of the unexpanded parameter packs in its pattern. 3946 unsigned getNumArgumentsInExpansion(QualType T, 3947 const MultiLevelTemplateArgumentList &TemplateArgs); 3948 3949 /// \brief Determine whether the given declarator contains any unexpanded 3950 /// parameter packs. 3951 /// 3952 /// This routine is used by the parser to disambiguate function declarators 3953 /// with an ellipsis prior to the ')', e.g., 3954 /// 3955 /// \code 3956 /// void f(T...); 3957 /// \endcode 3958 /// 3959 /// To determine whether we have an (unnamed) function parameter pack or 3960 /// a variadic function. 3961 /// 3962 /// \returns true if the declarator contains any unexpanded parameter packs, 3963 /// false otherwise. 3964 bool containsUnexpandedParameterPacks(Declarator &D); 3965 3966 //===--------------------------------------------------------------------===// 3967 // C++ Template Argument Deduction (C++ [temp.deduct]) 3968 //===--------------------------------------------------------------------===// 3969 3970 /// \brief Describes the result of template argument deduction. 3971 /// 3972 /// The TemplateDeductionResult enumeration describes the result of 3973 /// template argument deduction, as returned from 3974 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3975 /// structure provides additional information about the results of 3976 /// template argument deduction, e.g., the deduced template argument 3977 /// list (if successful) or the specific template parameters or 3978 /// deduced arguments that were involved in the failure. 3979 enum TemplateDeductionResult { 3980 /// \brief Template argument deduction was successful. 3981 TDK_Success = 0, 3982 /// \brief Template argument deduction exceeded the maximum template 3983 /// instantiation depth (which has already been diagnosed). 3984 TDK_InstantiationDepth, 3985 /// \brief Template argument deduction did not deduce a value 3986 /// for every template parameter. 3987 TDK_Incomplete, 3988 /// \brief Template argument deduction produced inconsistent 3989 /// deduced values for the given template parameter. 3990 TDK_Inconsistent, 3991 /// \brief Template argument deduction failed due to inconsistent 3992 /// cv-qualifiers on a template parameter type that would 3993 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3994 /// but were given a non-const "X". 3995 TDK_Underqualified, 3996 /// \brief Substitution of the deduced template argument values 3997 /// resulted in an error. 3998 TDK_SubstitutionFailure, 3999 /// \brief Substitution of the deduced template argument values 4000 /// into a non-deduced context produced a type or value that 4001 /// produces a type that does not match the original template 4002 /// arguments provided. 4003 TDK_NonDeducedMismatch, 4004 /// \brief When performing template argument deduction for a function 4005 /// template, there were too many call arguments. 4006 TDK_TooManyArguments, 4007 /// \brief When performing template argument deduction for a function 4008 /// template, there were too few call arguments. 4009 TDK_TooFewArguments, 4010 /// \brief The explicitly-specified template arguments were not valid 4011 /// template arguments for the given template. 4012 TDK_InvalidExplicitArguments, 4013 /// \brief The arguments included an overloaded function name that could 4014 /// not be resolved to a suitable function. 4015 TDK_FailedOverloadResolution 4016 }; 4017 4018 TemplateDeductionResult 4019 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4020 const TemplateArgumentList &TemplateArgs, 4021 sema::TemplateDeductionInfo &Info); 4022 4023 TemplateDeductionResult 4024 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4025 TemplateArgumentListInfo &ExplicitTemplateArgs, 4026 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4027 llvm::SmallVectorImpl<QualType> &ParamTypes, 4028 QualType *FunctionType, 4029 sema::TemplateDeductionInfo &Info); 4030 4031 TemplateDeductionResult 4032 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4033 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4034 unsigned NumExplicitlySpecified, 4035 FunctionDecl *&Specialization, 4036 sema::TemplateDeductionInfo &Info); 4037 4038 TemplateDeductionResult 4039 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4040 TemplateArgumentListInfo *ExplicitTemplateArgs, 4041 Expr **Args, unsigned NumArgs, 4042 FunctionDecl *&Specialization, 4043 sema::TemplateDeductionInfo &Info); 4044 4045 TemplateDeductionResult 4046 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4047 TemplateArgumentListInfo *ExplicitTemplateArgs, 4048 QualType ArgFunctionType, 4049 FunctionDecl *&Specialization, 4050 sema::TemplateDeductionInfo &Info); 4051 4052 TemplateDeductionResult 4053 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4054 QualType ToType, 4055 CXXConversionDecl *&Specialization, 4056 sema::TemplateDeductionInfo &Info); 4057 4058 TemplateDeductionResult 4059 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4060 TemplateArgumentListInfo *ExplicitTemplateArgs, 4061 FunctionDecl *&Specialization, 4062 sema::TemplateDeductionInfo &Info); 4063 4064 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4065 TypeSourceInfo *&Result); 4066 4067 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4068 FunctionTemplateDecl *FT2, 4069 SourceLocation Loc, 4070 TemplatePartialOrderingContext TPOC, 4071 unsigned NumCallArguments); 4072 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4073 UnresolvedSetIterator SEnd, 4074 TemplatePartialOrderingContext TPOC, 4075 unsigned NumCallArguments, 4076 SourceLocation Loc, 4077 const PartialDiagnostic &NoneDiag, 4078 const PartialDiagnostic &AmbigDiag, 4079 const PartialDiagnostic &CandidateDiag, 4080 bool Complain = true); 4081 4082 ClassTemplatePartialSpecializationDecl * 4083 getMoreSpecializedPartialSpecialization( 4084 ClassTemplatePartialSpecializationDecl *PS1, 4085 ClassTemplatePartialSpecializationDecl *PS2, 4086 SourceLocation Loc); 4087 4088 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4089 bool OnlyDeduced, 4090 unsigned Depth, 4091 llvm::SmallVectorImpl<bool> &Used); 4092 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4093 llvm::SmallVectorImpl<bool> &Deduced); 4094 4095 //===--------------------------------------------------------------------===// 4096 // C++ Template Instantiation 4097 // 4098 4099 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4100 const TemplateArgumentList *Innermost = 0, 4101 bool RelativeToPrimary = false, 4102 const FunctionDecl *Pattern = 0); 4103 4104 /// \brief A template instantiation that is currently in progress. 4105 struct ActiveTemplateInstantiation { 4106 /// \brief The kind of template instantiation we are performing 4107 enum InstantiationKind { 4108 /// We are instantiating a template declaration. The entity is 4109 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4110 TemplateInstantiation, 4111 4112 /// We are instantiating a default argument for a template 4113 /// parameter. The Entity is the template, and 4114 /// TemplateArgs/NumTemplateArguments provides the template 4115 /// arguments as specified. 4116 /// FIXME: Use a TemplateArgumentList 4117 DefaultTemplateArgumentInstantiation, 4118 4119 /// We are instantiating a default argument for a function. 4120 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4121 /// provides the template arguments as specified. 4122 DefaultFunctionArgumentInstantiation, 4123 4124 /// We are substituting explicit template arguments provided for 4125 /// a function template. The entity is a FunctionTemplateDecl. 4126 ExplicitTemplateArgumentSubstitution, 4127 4128 /// We are substituting template argument determined as part of 4129 /// template argument deduction for either a class template 4130 /// partial specialization or a function template. The 4131 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4132 /// a FunctionTemplateDecl. 4133 DeducedTemplateArgumentSubstitution, 4134 4135 /// We are substituting prior template arguments into a new 4136 /// template parameter. The template parameter itself is either a 4137 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4138 PriorTemplateArgumentSubstitution, 4139 4140 /// We are checking the validity of a default template argument that 4141 /// has been used when naming a template-id. 4142 DefaultTemplateArgumentChecking 4143 } Kind; 4144 4145 /// \brief The point of instantiation within the source code. 4146 SourceLocation PointOfInstantiation; 4147 4148 /// \brief The template (or partial specialization) in which we are 4149 /// performing the instantiation, for substitutions of prior template 4150 /// arguments. 4151 NamedDecl *Template; 4152 4153 /// \brief The entity that is being instantiated. 4154 uintptr_t Entity; 4155 4156 /// \brief The list of template arguments we are substituting, if they 4157 /// are not part of the entity. 4158 const TemplateArgument *TemplateArgs; 4159 4160 /// \brief The number of template arguments in TemplateArgs. 4161 unsigned NumTemplateArgs; 4162 4163 /// \brief The template deduction info object associated with the 4164 /// substitution or checking of explicit or deduced template arguments. 4165 sema::TemplateDeductionInfo *DeductionInfo; 4166 4167 /// \brief The source range that covers the construct that cause 4168 /// the instantiation, e.g., the template-id that causes a class 4169 /// template instantiation. 4170 SourceRange InstantiationRange; 4171 4172 ActiveTemplateInstantiation() 4173 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4174 NumTemplateArgs(0), DeductionInfo(0) {} 4175 4176 /// \brief Determines whether this template is an actual instantiation 4177 /// that should be counted toward the maximum instantiation depth. 4178 bool isInstantiationRecord() const; 4179 4180 friend bool operator==(const ActiveTemplateInstantiation &X, 4181 const ActiveTemplateInstantiation &Y) { 4182 if (X.Kind != Y.Kind) 4183 return false; 4184 4185 if (X.Entity != Y.Entity) 4186 return false; 4187 4188 switch (X.Kind) { 4189 case TemplateInstantiation: 4190 return true; 4191 4192 case PriorTemplateArgumentSubstitution: 4193 case DefaultTemplateArgumentChecking: 4194 if (X.Template != Y.Template) 4195 return false; 4196 4197 // Fall through 4198 4199 case DefaultTemplateArgumentInstantiation: 4200 case ExplicitTemplateArgumentSubstitution: 4201 case DeducedTemplateArgumentSubstitution: 4202 case DefaultFunctionArgumentInstantiation: 4203 return X.TemplateArgs == Y.TemplateArgs; 4204 4205 } 4206 4207 return true; 4208 } 4209 4210 friend bool operator!=(const ActiveTemplateInstantiation &X, 4211 const ActiveTemplateInstantiation &Y) { 4212 return !(X == Y); 4213 } 4214 }; 4215 4216 /// \brief List of active template instantiations. 4217 /// 4218 /// This vector is treated as a stack. As one template instantiation 4219 /// requires another template instantiation, additional 4220 /// instantiations are pushed onto the stack up to a 4221 /// user-configurable limit LangOptions::InstantiationDepth. 4222 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4223 ActiveTemplateInstantiations; 4224 4225 /// \brief Whether we are in a SFINAE context that is not associated with 4226 /// template instantiation. 4227 /// 4228 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4229 /// of a template instantiation or template argument deduction. 4230 bool InNonInstantiationSFINAEContext; 4231 4232 /// \brief The number of ActiveTemplateInstantiation entries in 4233 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4234 /// therefore, should not be counted as part of the instantiation depth. 4235 unsigned NonInstantiationEntries; 4236 4237 /// \brief The last template from which a template instantiation 4238 /// error or warning was produced. 4239 /// 4240 /// This value is used to suppress printing of redundant template 4241 /// instantiation backtraces when there are multiple errors in the 4242 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4243 /// to implement it anywhere else. 4244 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4245 4246 /// \brief The current index into pack expansion arguments that will be 4247 /// used for substitution of parameter packs. 4248 /// 4249 /// The pack expansion index will be -1 to indicate that parameter packs 4250 /// should be instantiated as themselves. Otherwise, the index specifies 4251 /// which argument within the parameter pack will be used for substitution. 4252 int ArgumentPackSubstitutionIndex; 4253 4254 /// \brief RAII object used to change the argument pack substitution index 4255 /// within a \c Sema object. 4256 /// 4257 /// See \c ArgumentPackSubstitutionIndex for more information. 4258 class ArgumentPackSubstitutionIndexRAII { 4259 Sema &Self; 4260 int OldSubstitutionIndex; 4261 4262 public: 4263 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4264 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4265 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4266 } 4267 4268 ~ArgumentPackSubstitutionIndexRAII() { 4269 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4270 } 4271 }; 4272 4273 friend class ArgumentPackSubstitutionRAII; 4274 4275 /// \brief The stack of calls expression undergoing template instantiation. 4276 /// 4277 /// The top of this stack is used by a fixit instantiating unresolved 4278 /// function calls to fix the AST to match the textual change it prints. 4279 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4280 4281 /// \brief For each declaration that involved template argument deduction, the 4282 /// set of diagnostics that were suppressed during that template argument 4283 /// deduction. 4284 /// 4285 /// FIXME: Serialize this structure to the AST file. 4286 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4287 SuppressedDiagnostics; 4288 4289 /// \brief A stack object to be created when performing template 4290 /// instantiation. 4291 /// 4292 /// Construction of an object of type \c InstantiatingTemplate 4293 /// pushes the current instantiation onto the stack of active 4294 /// instantiations. If the size of this stack exceeds the maximum 4295 /// number of recursive template instantiations, construction 4296 /// produces an error and evaluates true. 4297 /// 4298 /// Destruction of this object will pop the named instantiation off 4299 /// the stack. 4300 struct InstantiatingTemplate { 4301 /// \brief Note that we are instantiating a class template, 4302 /// function template, or a member thereof. 4303 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4304 Decl *Entity, 4305 SourceRange InstantiationRange = SourceRange()); 4306 4307 /// \brief Note that we are instantiating a default argument in a 4308 /// template-id. 4309 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4310 TemplateDecl *Template, 4311 const TemplateArgument *TemplateArgs, 4312 unsigned NumTemplateArgs, 4313 SourceRange InstantiationRange = SourceRange()); 4314 4315 /// \brief Note that we are instantiating a default argument in a 4316 /// template-id. 4317 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4318 FunctionTemplateDecl *FunctionTemplate, 4319 const TemplateArgument *TemplateArgs, 4320 unsigned NumTemplateArgs, 4321 ActiveTemplateInstantiation::InstantiationKind Kind, 4322 sema::TemplateDeductionInfo &DeductionInfo, 4323 SourceRange InstantiationRange = SourceRange()); 4324 4325 /// \brief Note that we are instantiating as part of template 4326 /// argument deduction for a class template partial 4327 /// specialization. 4328 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4329 ClassTemplatePartialSpecializationDecl *PartialSpec, 4330 const TemplateArgument *TemplateArgs, 4331 unsigned NumTemplateArgs, 4332 sema::TemplateDeductionInfo &DeductionInfo, 4333 SourceRange InstantiationRange = SourceRange()); 4334 4335 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4336 ParmVarDecl *Param, 4337 const TemplateArgument *TemplateArgs, 4338 unsigned NumTemplateArgs, 4339 SourceRange InstantiationRange = SourceRange()); 4340 4341 /// \brief Note that we are substituting prior template arguments into a 4342 /// non-type or template template parameter. 4343 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4344 NamedDecl *Template, 4345 NonTypeTemplateParmDecl *Param, 4346 const TemplateArgument *TemplateArgs, 4347 unsigned NumTemplateArgs, 4348 SourceRange InstantiationRange); 4349 4350 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4351 NamedDecl *Template, 4352 TemplateTemplateParmDecl *Param, 4353 const TemplateArgument *TemplateArgs, 4354 unsigned NumTemplateArgs, 4355 SourceRange InstantiationRange); 4356 4357 /// \brief Note that we are checking the default template argument 4358 /// against the template parameter for a given template-id. 4359 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4360 TemplateDecl *Template, 4361 NamedDecl *Param, 4362 const TemplateArgument *TemplateArgs, 4363 unsigned NumTemplateArgs, 4364 SourceRange InstantiationRange); 4365 4366 4367 /// \brief Note that we have finished instantiating this template. 4368 void Clear(); 4369 4370 ~InstantiatingTemplate() { Clear(); } 4371 4372 /// \brief Determines whether we have exceeded the maximum 4373 /// recursive template instantiations. 4374 operator bool() const { return Invalid; } 4375 4376 private: 4377 Sema &SemaRef; 4378 bool Invalid; 4379 bool SavedInNonInstantiationSFINAEContext; 4380 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4381 SourceRange InstantiationRange); 4382 4383 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4384 4385 InstantiatingTemplate& 4386 operator=(const InstantiatingTemplate&); // not implemented 4387 }; 4388 4389 void PrintInstantiationStack(); 4390 4391 /// \brief Determines whether we are currently in a context where 4392 /// template argument substitution failures are not considered 4393 /// errors. 4394 /// 4395 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4396 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4397 /// template-deduction context object, which can be used to capture 4398 /// diagnostics that will be suppressed. 4399 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4400 4401 /// \brief RAII class used to determine whether SFINAE has 4402 /// trapped any errors that occur during template argument 4403 /// deduction.` 4404 class SFINAETrap { 4405 Sema &SemaRef; 4406 unsigned PrevSFINAEErrors; 4407 bool PrevInNonInstantiationSFINAEContext; 4408 bool PrevAccessCheckingSFINAE; 4409 4410 public: 4411 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4412 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4413 PrevInNonInstantiationSFINAEContext( 4414 SemaRef.InNonInstantiationSFINAEContext), 4415 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4416 { 4417 if (!SemaRef.isSFINAEContext()) 4418 SemaRef.InNonInstantiationSFINAEContext = true; 4419 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4420 } 4421 4422 ~SFINAETrap() { 4423 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4424 SemaRef.InNonInstantiationSFINAEContext 4425 = PrevInNonInstantiationSFINAEContext; 4426 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4427 } 4428 4429 /// \brief Determine whether any SFINAE errors have been trapped. 4430 bool hasErrorOccurred() const { 4431 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4432 } 4433 }; 4434 4435 /// \brief The current instantiation scope used to store local 4436 /// variables. 4437 LocalInstantiationScope *CurrentInstantiationScope; 4438 4439 /// \brief The number of typos corrected by CorrectTypo. 4440 unsigned TyposCorrected; 4441 4442 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4443 UnqualifiedTyposCorrectedMap; 4444 4445 /// \brief A cache containing the results of typo correction for unqualified 4446 /// name lookup. 4447 /// 4448 /// The string is the string that we corrected to (which may be empty, if 4449 /// there was no correction), while the boolean will be true when the 4450 /// string represents a keyword. 4451 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4452 4453 /// \brief Worker object for performing CFG-based warnings. 4454 sema::AnalysisBasedWarnings AnalysisWarnings; 4455 4456 /// \brief An entity for which implicit template instantiation is required. 4457 /// 4458 /// The source location associated with the declaration is the first place in 4459 /// the source code where the declaration was "used". It is not necessarily 4460 /// the point of instantiation (which will be either before or after the 4461 /// namespace-scope declaration that triggered this implicit instantiation), 4462 /// However, it is the location that diagnostics should generally refer to, 4463 /// because users will need to know what code triggered the instantiation. 4464 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4465 4466 /// \brief The queue of implicit template instantiations that are required 4467 /// but have not yet been performed. 4468 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4469 4470 /// \brief The queue of implicit template instantiations that are required 4471 /// and must be performed within the current local scope. 4472 /// 4473 /// This queue is only used for member functions of local classes in 4474 /// templates, which must be instantiated in the same scope as their 4475 /// enclosing function, so that they can reference function-local 4476 /// types, static variables, enumerators, etc. 4477 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4478 4479 bool PerformPendingInstantiations(bool LocalOnly = false); 4480 4481 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4482 const MultiLevelTemplateArgumentList &TemplateArgs, 4483 SourceLocation Loc, DeclarationName Entity); 4484 4485 QualType SubstType(QualType T, 4486 const MultiLevelTemplateArgumentList &TemplateArgs, 4487 SourceLocation Loc, DeclarationName Entity); 4488 4489 TypeSourceInfo *SubstType(TypeLoc TL, 4490 const MultiLevelTemplateArgumentList &TemplateArgs, 4491 SourceLocation Loc, DeclarationName Entity); 4492 4493 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4494 const MultiLevelTemplateArgumentList &TemplateArgs, 4495 SourceLocation Loc, 4496 DeclarationName Entity); 4497 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4498 const MultiLevelTemplateArgumentList &TemplateArgs, 4499 llvm::Optional<unsigned> NumExpansions); 4500 bool SubstParmTypes(SourceLocation Loc, 4501 ParmVarDecl **Params, unsigned NumParams, 4502 const MultiLevelTemplateArgumentList &TemplateArgs, 4503 llvm::SmallVectorImpl<QualType> &ParamTypes, 4504 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4505 ExprResult SubstExpr(Expr *E, 4506 const MultiLevelTemplateArgumentList &TemplateArgs); 4507 4508 /// \brief Substitute the given template arguments into a list of 4509 /// expressions, expanding pack expansions if required. 4510 /// 4511 /// \param Exprs The list of expressions to substitute into. 4512 /// 4513 /// \param NumExprs The number of expressions in \p Exprs. 4514 /// 4515 /// \param IsCall Whether this is some form of call, in which case 4516 /// default arguments will be dropped. 4517 /// 4518 /// \param TemplateArgs The set of template arguments to substitute. 4519 /// 4520 /// \param Outputs Will receive all of the substituted arguments. 4521 /// 4522 /// \returns true if an error occurred, false otherwise. 4523 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4524 const MultiLevelTemplateArgumentList &TemplateArgs, 4525 llvm::SmallVectorImpl<Expr *> &Outputs); 4526 4527 StmtResult SubstStmt(Stmt *S, 4528 const MultiLevelTemplateArgumentList &TemplateArgs); 4529 4530 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4531 const MultiLevelTemplateArgumentList &TemplateArgs); 4532 4533 bool 4534 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4535 CXXRecordDecl *Pattern, 4536 const MultiLevelTemplateArgumentList &TemplateArgs); 4537 4538 bool 4539 InstantiateClass(SourceLocation PointOfInstantiation, 4540 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4541 const MultiLevelTemplateArgumentList &TemplateArgs, 4542 TemplateSpecializationKind TSK, 4543 bool Complain = true); 4544 4545 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4546 Decl *Pattern, Decl *Inst); 4547 4548 bool 4549 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4550 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4551 TemplateSpecializationKind TSK, 4552 bool Complain = true); 4553 4554 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4555 CXXRecordDecl *Instantiation, 4556 const MultiLevelTemplateArgumentList &TemplateArgs, 4557 TemplateSpecializationKind TSK); 4558 4559 void InstantiateClassTemplateSpecializationMembers( 4560 SourceLocation PointOfInstantiation, 4561 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4562 TemplateSpecializationKind TSK); 4563 4564 NestedNameSpecifierLoc 4565 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4566 const MultiLevelTemplateArgumentList &TemplateArgs); 4567 4568 DeclarationNameInfo 4569 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4570 const MultiLevelTemplateArgumentList &TemplateArgs); 4571 TemplateName 4572 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4573 SourceLocation Loc, 4574 const MultiLevelTemplateArgumentList &TemplateArgs); 4575 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4576 TemplateArgumentListInfo &Result, 4577 const MultiLevelTemplateArgumentList &TemplateArgs); 4578 4579 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4580 FunctionDecl *Function, 4581 bool Recursive = false, 4582 bool DefinitionRequired = false); 4583 void InstantiateStaticDataMemberDefinition( 4584 SourceLocation PointOfInstantiation, 4585 VarDecl *Var, 4586 bool Recursive = false, 4587 bool DefinitionRequired = false); 4588 4589 void InstantiateMemInitializers(CXXConstructorDecl *New, 4590 const CXXConstructorDecl *Tmpl, 4591 const MultiLevelTemplateArgumentList &TemplateArgs); 4592 4593 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4594 const MultiLevelTemplateArgumentList &TemplateArgs); 4595 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4596 const MultiLevelTemplateArgumentList &TemplateArgs); 4597 4598 // Objective-C declarations. 4599 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4600 IdentifierInfo *ClassName, 4601 SourceLocation ClassLoc, 4602 IdentifierInfo *SuperName, 4603 SourceLocation SuperLoc, 4604 Decl * const *ProtoRefs, 4605 unsigned NumProtoRefs, 4606 const SourceLocation *ProtoLocs, 4607 SourceLocation EndProtoLoc, 4608 AttributeList *AttrList); 4609 4610 Decl *ActOnCompatiblityAlias( 4611 SourceLocation AtCompatibilityAliasLoc, 4612 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4613 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4614 4615 void CheckForwardProtocolDeclarationForCircularDependency( 4616 IdentifierInfo *PName, 4617 SourceLocation &PLoc, SourceLocation PrevLoc, 4618 const ObjCList<ObjCProtocolDecl> &PList); 4619 4620 Decl *ActOnStartProtocolInterface( 4621 SourceLocation AtProtoInterfaceLoc, 4622 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4623 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4624 const SourceLocation *ProtoLocs, 4625 SourceLocation EndProtoLoc, 4626 AttributeList *AttrList); 4627 4628 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4629 IdentifierInfo *ClassName, 4630 SourceLocation ClassLoc, 4631 IdentifierInfo *CategoryName, 4632 SourceLocation CategoryLoc, 4633 Decl * const *ProtoRefs, 4634 unsigned NumProtoRefs, 4635 const SourceLocation *ProtoLocs, 4636 SourceLocation EndProtoLoc); 4637 4638 Decl *ActOnStartClassImplementation( 4639 SourceLocation AtClassImplLoc, 4640 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4641 IdentifierInfo *SuperClassname, 4642 SourceLocation SuperClassLoc); 4643 4644 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4645 IdentifierInfo *ClassName, 4646 SourceLocation ClassLoc, 4647 IdentifierInfo *CatName, 4648 SourceLocation CatLoc); 4649 4650 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4651 IdentifierInfo **IdentList, 4652 SourceLocation *IdentLocs, 4653 unsigned NumElts); 4654 4655 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4656 const IdentifierLocPair *IdentList, 4657 unsigned NumElts, 4658 AttributeList *attrList); 4659 4660 void FindProtocolDeclaration(bool WarnOnDeclarations, 4661 const IdentifierLocPair *ProtocolId, 4662 unsigned NumProtocols, 4663 llvm::SmallVectorImpl<Decl *> &Protocols); 4664 4665 /// Ensure attributes are consistent with type. 4666 /// \param [in, out] Attributes The attributes to check; they will 4667 /// be modified to be consistent with \arg PropertyTy. 4668 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4669 SourceLocation Loc, 4670 unsigned &Attributes); 4671 4672 /// Process the specified property declaration and create decls for the 4673 /// setters and getters as needed. 4674 /// \param property The property declaration being processed 4675 /// \param DC The semantic container for the property 4676 /// \param redeclaredProperty Declaration for property if redeclared 4677 /// in class extension. 4678 /// \param lexicalDC Container for redeclaredProperty. 4679 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4680 ObjCContainerDecl *DC, 4681 ObjCPropertyDecl *redeclaredProperty = 0, 4682 ObjCContainerDecl *lexicalDC = 0); 4683 4684 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4685 ObjCPropertyDecl *SuperProperty, 4686 const IdentifierInfo *Name); 4687 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4688 4689 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4690 ObjCMethodDecl *MethodDecl, 4691 bool IsInstance); 4692 4693 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4694 4695 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4696 ObjCInterfaceDecl *ID); 4697 4698 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4699 ObjCProtocolDecl *PDecl); 4700 4701 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4702 Decl **allMethods = 0, unsigned allNum = 0, 4703 Decl **allProperties = 0, unsigned pNum = 0, 4704 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4705 4706 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4707 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4708 Selector GetterSel, Selector SetterSel, 4709 Decl *ClassCategory, 4710 bool *OverridingProperty, 4711 tok::ObjCKeywordKind MethodImplKind, 4712 DeclContext *lexicalDC = 0); 4713 4714 Decl *ActOnPropertyImplDecl(Scope *S, 4715 SourceLocation AtLoc, 4716 SourceLocation PropertyLoc, 4717 bool ImplKind,Decl *ClassImplDecl, 4718 IdentifierInfo *PropertyId, 4719 IdentifierInfo *PropertyIvar, 4720 SourceLocation PropertyIvarLoc); 4721 4722 struct ObjCArgInfo { 4723 IdentifierInfo *Name; 4724 SourceLocation NameLoc; 4725 // The Type is null if no type was specified, and the DeclSpec is invalid 4726 // in this case. 4727 ParsedType Type; 4728 ObjCDeclSpec DeclSpec; 4729 4730 /// ArgAttrs - Attribute list for this argument. 4731 AttributeList *ArgAttrs; 4732 }; 4733 4734 Decl *ActOnMethodDeclaration( 4735 Scope *S, 4736 SourceLocation BeginLoc, // location of the + or -. 4737 SourceLocation EndLoc, // location of the ; or {. 4738 tok::TokenKind MethodType, 4739 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4740 Selector Sel, 4741 // optional arguments. The number of types/arguments is obtained 4742 // from the Sel.getNumArgs(). 4743 ObjCArgInfo *ArgInfo, 4744 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4745 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4746 bool isVariadic, bool MethodDefinition); 4747 4748 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4749 // Will search "local" class/category implementations for a method decl. 4750 // Will also search in class's root looking for instance method. 4751 // Returns 0 if no method is found. 4752 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4753 ObjCInterfaceDecl *CDecl); 4754 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4755 ObjCInterfaceDecl *ClassDecl); 4756 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 4757 const ObjCObjectPointerType *OPT, 4758 bool IsInstance); 4759 4760 ExprResult 4761 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4762 Expr *BaseExpr, 4763 DeclarationName MemberName, 4764 SourceLocation MemberLoc, 4765 SourceLocation SuperLoc, QualType SuperType, 4766 bool Super); 4767 4768 ExprResult 4769 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4770 IdentifierInfo &propertyName, 4771 SourceLocation receiverNameLoc, 4772 SourceLocation propertyNameLoc); 4773 4774 ObjCMethodDecl *tryCaptureObjCSelf(); 4775 4776 /// \brief Describes the kind of message expression indicated by a message 4777 /// send that starts with an identifier. 4778 enum ObjCMessageKind { 4779 /// \brief The message is sent to 'super'. 4780 ObjCSuperMessage, 4781 /// \brief The message is an instance message. 4782 ObjCInstanceMessage, 4783 /// \brief The message is a class message, and the identifier is a type 4784 /// name. 4785 ObjCClassMessage 4786 }; 4787 4788 ObjCMessageKind getObjCMessageKind(Scope *S, 4789 IdentifierInfo *Name, 4790 SourceLocation NameLoc, 4791 bool IsSuper, 4792 bool HasTrailingDot, 4793 ParsedType &ReceiverType); 4794 4795 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4796 Selector Sel, 4797 SourceLocation LBracLoc, 4798 SourceLocation SelectorLoc, 4799 SourceLocation RBracLoc, 4800 MultiExprArg Args); 4801 4802 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4803 QualType ReceiverType, 4804 SourceLocation SuperLoc, 4805 Selector Sel, 4806 ObjCMethodDecl *Method, 4807 SourceLocation LBracLoc, 4808 SourceLocation SelectorLoc, 4809 SourceLocation RBracLoc, 4810 MultiExprArg Args); 4811 4812 ExprResult ActOnClassMessage(Scope *S, 4813 ParsedType Receiver, 4814 Selector Sel, 4815 SourceLocation LBracLoc, 4816 SourceLocation SelectorLoc, 4817 SourceLocation RBracLoc, 4818 MultiExprArg Args); 4819 4820 ExprResult BuildInstanceMessage(Expr *Receiver, 4821 QualType ReceiverType, 4822 SourceLocation SuperLoc, 4823 Selector Sel, 4824 ObjCMethodDecl *Method, 4825 SourceLocation LBracLoc, 4826 SourceLocation SelectorLoc, 4827 SourceLocation RBracLoc, 4828 MultiExprArg Args); 4829 4830 ExprResult ActOnInstanceMessage(Scope *S, 4831 Expr *Receiver, 4832 Selector Sel, 4833 SourceLocation LBracLoc, 4834 SourceLocation SelectorLoc, 4835 SourceLocation RBracLoc, 4836 MultiExprArg Args); 4837 4838 4839 enum PragmaOptionsAlignKind { 4840 POAK_Native, // #pragma options align=native 4841 POAK_Natural, // #pragma options align=natural 4842 POAK_Packed, // #pragma options align=packed 4843 POAK_Power, // #pragma options align=power 4844 POAK_Mac68k, // #pragma options align=mac68k 4845 POAK_Reset // #pragma options align=reset 4846 }; 4847 4848 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4849 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4850 SourceLocation PragmaLoc, 4851 SourceLocation KindLoc); 4852 4853 enum PragmaPackKind { 4854 PPK_Default, // #pragma pack([n]) 4855 PPK_Show, // #pragma pack(show), only supported by MSVC. 4856 PPK_Push, // #pragma pack(push, [identifier], [n]) 4857 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4858 }; 4859 4860 enum PragmaMSStructKind { 4861 PMSST_OFF, // #pragms ms_struct off 4862 PMSST_ON // #pragms ms_struct on 4863 }; 4864 4865 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4866 void ActOnPragmaPack(PragmaPackKind Kind, 4867 IdentifierInfo *Name, 4868 Expr *Alignment, 4869 SourceLocation PragmaLoc, 4870 SourceLocation LParenLoc, 4871 SourceLocation RParenLoc); 4872 4873 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 4874 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 4875 4876 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4877 void ActOnPragmaUnused(const Token &Identifier, 4878 Scope *curScope, 4879 SourceLocation PragmaLoc); 4880 4881 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4882 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4883 SourceLocation PragmaLoc); 4884 4885 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4886 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4887 4888 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4889 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4890 SourceLocation PragmaLoc, 4891 SourceLocation WeakNameLoc); 4892 4893 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4894 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4895 IdentifierInfo* AliasName, 4896 SourceLocation PragmaLoc, 4897 SourceLocation WeakNameLoc, 4898 SourceLocation AliasNameLoc); 4899 4900 /// ActOnPragmaFPContract - Called on well formed 4901 /// #pragma {STDC,OPENCL} FP_CONTRACT 4902 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4903 4904 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4905 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4906 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4907 4908 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 4909 void AddMsStructLayoutForRecord(RecordDecl *RD); 4910 4911 /// FreePackedContext - Deallocate and null out PackContext. 4912 void FreePackedContext(); 4913 4914 /// PushNamespaceVisibilityAttr - Note that we've entered a 4915 /// namespace with a visibility attribute. 4916 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4917 4918 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4919 /// add an appropriate visibility attribute. 4920 void AddPushedVisibilityAttribute(Decl *RD); 4921 4922 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4923 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4924 void PopPragmaVisibility(); 4925 4926 /// FreeVisContext - Deallocate and null out VisContext. 4927 void FreeVisContext(); 4928 4929 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4930 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4931 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4932 4933 /// CastCategory - Get the correct forwarded implicit cast result category 4934 /// from the inner expression. 4935 ExprValueKind CastCategory(Expr *E); 4936 4937 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4938 /// cast. If there is already an implicit cast, merge into the existing one. 4939 /// If isLvalue, the result of the cast is an lvalue. 4940 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 4941 ExprValueKind VK = VK_RValue, 4942 const CXXCastPath *BasePath = 0); 4943 4944 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 4945 /// to the conversion from scalar type ScalarTy to the Boolean type. 4946 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 4947 4948 /// IgnoredValueConversions - Given that an expression's result is 4949 /// syntactically ignored, perform any conversions that are 4950 /// required. 4951 ExprResult IgnoredValueConversions(Expr *E); 4952 4953 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4954 // functions and arrays to their respective pointers (C99 6.3.2.1). 4955 ExprResult UsualUnaryConversions(Expr *E); 4956 4957 // DefaultFunctionArrayConversion - converts functions and arrays 4958 // to their respective pointers (C99 6.3.2.1). 4959 ExprResult DefaultFunctionArrayConversion(Expr *E); 4960 4961 // DefaultFunctionArrayLvalueConversion - converts functions and 4962 // arrays to their respective pointers and performs the 4963 // lvalue-to-rvalue conversion. 4964 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 4965 4966 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4967 // the operand. This is DefaultFunctionArrayLvalueConversion, 4968 // except that it assumes the operand isn't of function or array 4969 // type. 4970 ExprResult DefaultLvalueConversion(Expr *E); 4971 4972 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4973 // do not have a prototype. Integer promotions are performed on each 4974 // argument, and arguments that have type float are promoted to double. 4975 ExprResult DefaultArgumentPromotion(Expr *E); 4976 4977 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4978 enum VariadicCallType { 4979 VariadicFunction, 4980 VariadicBlock, 4981 VariadicMethod, 4982 VariadicConstructor, 4983 VariadicDoesNotApply 4984 }; 4985 4986 /// GatherArgumentsForCall - Collector argument expressions for various 4987 /// form of call prototypes. 4988 bool GatherArgumentsForCall(SourceLocation CallLoc, 4989 FunctionDecl *FDecl, 4990 const FunctionProtoType *Proto, 4991 unsigned FirstProtoArg, 4992 Expr **Args, unsigned NumArgs, 4993 llvm::SmallVector<Expr *, 8> &AllArgs, 4994 VariadicCallType CallType = VariadicDoesNotApply); 4995 4996 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4997 // will warn if the resulting type is not a POD type. 4998 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 4999 FunctionDecl *FDecl); 5000 5001 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5002 // operands and then handles various conversions that are common to binary 5003 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5004 // routine returns the first non-arithmetic type found. The client is 5005 // responsible for emitting appropriate error diagnostics. 5006 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5007 bool isCompAssign = false); 5008 5009 /// AssignConvertType - All of the 'assignment' semantic checks return this 5010 /// enum to indicate whether the assignment was allowed. These checks are 5011 /// done for simple assignments, as well as initialization, return from 5012 /// function, argument passing, etc. The query is phrased in terms of a 5013 /// source and destination type. 5014 enum AssignConvertType { 5015 /// Compatible - the types are compatible according to the standard. 5016 Compatible, 5017 5018 /// PointerToInt - The assignment converts a pointer to an int, which we 5019 /// accept as an extension. 5020 PointerToInt, 5021 5022 /// IntToPointer - The assignment converts an int to a pointer, which we 5023 /// accept as an extension. 5024 IntToPointer, 5025 5026 /// FunctionVoidPointer - The assignment is between a function pointer and 5027 /// void*, which the standard doesn't allow, but we accept as an extension. 5028 FunctionVoidPointer, 5029 5030 /// IncompatiblePointer - The assignment is between two pointers types that 5031 /// are not compatible, but we accept them as an extension. 5032 IncompatiblePointer, 5033 5034 /// IncompatiblePointer - The assignment is between two pointers types which 5035 /// point to integers which have a different sign, but are otherwise identical. 5036 /// This is a subset of the above, but broken out because it's by far the most 5037 /// common case of incompatible pointers. 5038 IncompatiblePointerSign, 5039 5040 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5041 /// c/v/r qualifiers, which we accept as an extension. 5042 CompatiblePointerDiscardsQualifiers, 5043 5044 /// IncompatiblePointerDiscardsQualifiers - The assignment 5045 /// discards qualifiers that we don't permit to be discarded, 5046 /// like address spaces. 5047 IncompatiblePointerDiscardsQualifiers, 5048 5049 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5050 /// nested pointer types, and the qualifiers other than the first two 5051 /// levels differ e.g. char ** -> const char **, but we accept them as an 5052 /// extension. 5053 IncompatibleNestedPointerQualifiers, 5054 5055 /// IncompatibleVectors - The assignment is between two vector types that 5056 /// have the same size, which we accept as an extension. 5057 IncompatibleVectors, 5058 5059 /// IntToBlockPointer - The assignment converts an int to a block 5060 /// pointer. We disallow this. 5061 IntToBlockPointer, 5062 5063 /// IncompatibleBlockPointer - The assignment is between two block 5064 /// pointers types that are not compatible. 5065 IncompatibleBlockPointer, 5066 5067 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5068 /// id type and something else (that is incompatible with it). For example, 5069 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5070 IncompatibleObjCQualifiedId, 5071 5072 /// Incompatible - We reject this conversion outright, it is invalid to 5073 /// represent it in the AST. 5074 Incompatible 5075 }; 5076 5077 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5078 /// assignment conversion type specified by ConvTy. This returns true if the 5079 /// conversion was invalid or false if the conversion was accepted. 5080 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5081 SourceLocation Loc, 5082 QualType DstType, QualType SrcType, 5083 Expr *SrcExpr, AssignmentAction Action, 5084 bool *Complained = 0); 5085 5086 /// CheckAssignmentConstraints - Perform type checking for assignment, 5087 /// argument passing, variable initialization, and function return values. 5088 /// C99 6.5.16. 5089 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5090 QualType lhs, QualType rhs); 5091 5092 /// Check assignment constraints and prepare for a conversion of the 5093 /// RHS to the LHS type. 5094 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5095 CastKind &Kind); 5096 5097 // CheckSingleAssignmentConstraints - Currently used by 5098 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5099 // this routine performs the default function/array converions. 5100 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5101 ExprResult &rExprRes); 5102 5103 // \brief If the lhs type is a transparent union, check whether we 5104 // can initialize the transparent union with the given expression. 5105 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5106 ExprResult &rExpr); 5107 5108 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5109 5110 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5111 5112 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5113 AssignmentAction Action, 5114 bool AllowExplicit = false); 5115 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5116 AssignmentAction Action, 5117 bool AllowExplicit, 5118 ImplicitConversionSequence& ICS); 5119 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5120 const ImplicitConversionSequence& ICS, 5121 AssignmentAction Action, 5122 bool CStyle = false); 5123 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5124 const StandardConversionSequence& SCS, 5125 AssignmentAction Action, 5126 bool CStyle); 5127 5128 /// the following "Check" methods will return a valid/converted QualType 5129 /// or a null QualType (indicating an error diagnostic was issued). 5130 5131 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5132 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5133 QualType CheckPointerToMemberOperands( // C++ 5.5 5134 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5135 SourceLocation OpLoc, bool isIndirect); 5136 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5137 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5138 bool isDivide); 5139 QualType CheckRemainderOperands( // C99 6.5.5 5140 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5141 QualType CheckAdditionOperands( // C99 6.5.6 5142 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5143 QualType CheckSubtractionOperands( // C99 6.5.6 5144 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5145 QualType CheckShiftOperands( // C99 6.5.7 5146 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5147 bool isCompAssign = false); 5148 QualType CheckCompareOperands( // C99 6.5.8/9 5149 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5150 bool isRelational); 5151 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5152 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5153 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5154 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5155 // CheckAssignmentOperands is used for both simple and compound assignment. 5156 // For simple assignment, pass both expressions and a null converted type. 5157 // For compound assignment, pass both expressions and the converted type. 5158 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5159 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5160 5161 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5162 ExprResult ConvertPropertyForRValue(Expr *E); 5163 5164 QualType CheckConditionalOperands( // C99 6.5.15 5165 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5166 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5167 QualType CXXCheckConditionalOperands( // C++ 5.16 5168 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5169 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5170 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5171 bool *NonStandardCompositeType = 0); 5172 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5173 bool *NonStandardCompositeType = 0) { 5174 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5175 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5176 E1 = Owned(E1Tmp); 5177 E2 = Owned(E2Tmp); 5178 return Composite; 5179 } 5180 5181 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5182 SourceLocation questionLoc); 5183 5184 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5185 SourceLocation QuestionLoc); 5186 5187 /// type checking for vector binary operators. 5188 QualType CheckVectorOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5189 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5190 SourceLocation l, bool isRel); 5191 5192 /// type checking declaration initializers (C99 6.7.8) 5193 bool CheckInitList(const InitializedEntity &Entity, 5194 InitListExpr *&InitList, QualType &DeclType); 5195 bool CheckForConstantInitializer(Expr *e, QualType t); 5196 5197 // type checking C++ declaration initializers (C++ [dcl.init]). 5198 5199 /// ReferenceCompareResult - Expresses the result of comparing two 5200 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5201 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5202 enum ReferenceCompareResult { 5203 /// Ref_Incompatible - The two types are incompatible, so direct 5204 /// reference binding is not possible. 5205 Ref_Incompatible = 0, 5206 /// Ref_Related - The two types are reference-related, which means 5207 /// that their unqualified forms (T1 and T2) are either the same 5208 /// or T1 is a base class of T2. 5209 Ref_Related, 5210 /// Ref_Compatible_With_Added_Qualification - The two types are 5211 /// reference-compatible with added qualification, meaning that 5212 /// they are reference-compatible and the qualifiers on T1 (cv1) 5213 /// are greater than the qualifiers on T2 (cv2). 5214 Ref_Compatible_With_Added_Qualification, 5215 /// Ref_Compatible - The two types are reference-compatible and 5216 /// have equivalent qualifiers (cv1 == cv2). 5217 Ref_Compatible 5218 }; 5219 5220 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5221 QualType T1, QualType T2, 5222 bool &DerivedToBase, 5223 bool &ObjCConversion); 5224 5225 /// CheckCastTypes - Check type constraints for casting between types under 5226 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5227 ExprResult CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *CastExpr, 5228 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 5229 bool FunctionalStyle = false); 5230 5231 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5232 Expr *castExpr, CastKind &castKind, 5233 ExprValueKind &valueKind, CXXCastPath &BasePath); 5234 5235 // CheckVectorCast - check type constraints for vectors. 5236 // Since vectors are an extension, there are no C standard reference for this. 5237 // We allow casting between vectors and integer datatypes of the same size. 5238 // returns true if the cast is invalid 5239 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5240 CastKind &Kind); 5241 5242 // CheckExtVectorCast - check type constraints for extended vectors. 5243 // Since vectors are an extension, there are no C standard reference for this. 5244 // We allow casting between vectors and integer datatypes of the same size, 5245 // or vectors and the element type of that vector. 5246 // returns the cast expr 5247 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5248 CastKind &Kind); 5249 5250 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5251 /// cast under C++ semantics. 5252 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5253 Expr *CastExpr, CastKind &Kind, 5254 CXXCastPath &BasePath, bool FunctionalStyle); 5255 5256 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5257 /// \param Method - May be null. 5258 /// \param [out] ReturnType - The return type of the send. 5259 /// \return true iff there were any incompatible types. 5260 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5261 ObjCMethodDecl *Method, bool isClassMessage, 5262 SourceLocation lbrac, SourceLocation rbrac, 5263 QualType &ReturnType, ExprValueKind &VK); 5264 5265 /// CheckBooleanCondition - Diagnose problems involving the use of 5266 /// the given expression as a boolean condition (e.g. in an if 5267 /// statement). Also performs the standard function and array 5268 /// decays, possibly changing the input variable. 5269 /// 5270 /// \param Loc - A location associated with the condition, e.g. the 5271 /// 'if' keyword. 5272 /// \return true iff there were any errors 5273 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5274 5275 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5276 Expr *SubExpr); 5277 5278 /// DiagnoseAssignmentAsCondition - Given that an expression is 5279 /// being used as a boolean condition, warn if it's an assignment. 5280 void DiagnoseAssignmentAsCondition(Expr *E); 5281 5282 /// \brief Redundant parentheses over an equality comparison can indicate 5283 /// that the user intended an assignment used as condition. 5284 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5285 5286 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5287 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5288 5289 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5290 /// the specified width and sign. If an overflow occurs, detect it and emit 5291 /// the specified diagnostic. 5292 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5293 unsigned NewWidth, bool NewSign, 5294 SourceLocation Loc, unsigned DiagID); 5295 5296 /// Checks that the Objective-C declaration is declared in the global scope. 5297 /// Emits an error and marks the declaration as invalid if it's not declared 5298 /// in the global scope. 5299 bool CheckObjCDeclScope(Decl *D); 5300 5301 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5302 /// and reports the appropriate diagnostics. Returns false on success. 5303 /// Can optionally return the value of the expression. 5304 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5305 5306 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5307 /// the correct width, and that the field type is valid. 5308 /// Returns false on success. 5309 /// Can optionally return whether the bit-field is of width 0 5310 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5311 QualType FieldTy, const Expr *BitWidth, 5312 bool *ZeroWidth = 0); 5313 5314 /// \name Code completion 5315 //@{ 5316 /// \brief Describes the context in which code completion occurs. 5317 enum ParserCompletionContext { 5318 /// \brief Code completion occurs at top-level or namespace context. 5319 PCC_Namespace, 5320 /// \brief Code completion occurs within a class, struct, or union. 5321 PCC_Class, 5322 /// \brief Code completion occurs within an Objective-C interface, protocol, 5323 /// or category. 5324 PCC_ObjCInterface, 5325 /// \brief Code completion occurs within an Objective-C implementation or 5326 /// category implementation 5327 PCC_ObjCImplementation, 5328 /// \brief Code completion occurs within the list of instance variables 5329 /// in an Objective-C interface, protocol, category, or implementation. 5330 PCC_ObjCInstanceVariableList, 5331 /// \brief Code completion occurs following one or more template 5332 /// headers. 5333 PCC_Template, 5334 /// \brief Code completion occurs following one or more template 5335 /// headers within a class. 5336 PCC_MemberTemplate, 5337 /// \brief Code completion occurs within an expression. 5338 PCC_Expression, 5339 /// \brief Code completion occurs within a statement, which may 5340 /// also be an expression or a declaration. 5341 PCC_Statement, 5342 /// \brief Code completion occurs at the beginning of the 5343 /// initialization statement (or expression) in a for loop. 5344 PCC_ForInit, 5345 /// \brief Code completion occurs within the condition of an if, 5346 /// while, switch, or for statement. 5347 PCC_Condition, 5348 /// \brief Code completion occurs within the body of a function on a 5349 /// recovery path, where we do not have a specific handle on our position 5350 /// in the grammar. 5351 PCC_RecoveryInFunction, 5352 /// \brief Code completion occurs where only a type is permitted. 5353 PCC_Type, 5354 /// \brief Code completion occurs in a parenthesized expression, which 5355 /// might also be a type cast. 5356 PCC_ParenthesizedExpression, 5357 /// \brief Code completion occurs within a sequence of declaration 5358 /// specifiers within a function, method, or block. 5359 PCC_LocalDeclarationSpecifiers 5360 }; 5361 5362 void CodeCompleteOrdinaryName(Scope *S, 5363 ParserCompletionContext CompletionContext); 5364 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5365 bool AllowNonIdentifiers, 5366 bool AllowNestedNameSpecifiers); 5367 5368 struct CodeCompleteExpressionData; 5369 void CodeCompleteExpression(Scope *S, 5370 const CodeCompleteExpressionData &Data); 5371 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5372 SourceLocation OpLoc, 5373 bool IsArrow); 5374 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5375 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5376 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5377 void CodeCompleteCase(Scope *S); 5378 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5379 void CodeCompleteInitializer(Scope *S, Decl *D); 5380 void CodeCompleteReturn(Scope *S); 5381 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5382 5383 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5384 bool EnteringContext); 5385 void CodeCompleteUsing(Scope *S); 5386 void CodeCompleteUsingDirective(Scope *S); 5387 void CodeCompleteNamespaceDecl(Scope *S); 5388 void CodeCompleteNamespaceAliasDecl(Scope *S); 5389 void CodeCompleteOperatorName(Scope *S); 5390 void CodeCompleteConstructorInitializer(Decl *Constructor, 5391 CXXCtorInitializer** Initializers, 5392 unsigned NumInitializers); 5393 5394 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5395 bool InInterface); 5396 void CodeCompleteObjCAtVisibility(Scope *S); 5397 void CodeCompleteObjCAtStatement(Scope *S); 5398 void CodeCompleteObjCAtExpression(Scope *S); 5399 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5400 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5401 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5402 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5403 bool IsParameter); 5404 void CodeCompleteObjCMessageReceiver(Scope *S); 5405 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5406 IdentifierInfo **SelIdents, 5407 unsigned NumSelIdents, 5408 bool AtArgumentExpression); 5409 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5410 IdentifierInfo **SelIdents, 5411 unsigned NumSelIdents, 5412 bool AtArgumentExpression, 5413 bool IsSuper = false); 5414 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5415 IdentifierInfo **SelIdents, 5416 unsigned NumSelIdents, 5417 bool AtArgumentExpression, 5418 ObjCInterfaceDecl *Super = 0); 5419 void CodeCompleteObjCForCollection(Scope *S, 5420 DeclGroupPtrTy IterationVar); 5421 void CodeCompleteObjCSelector(Scope *S, 5422 IdentifierInfo **SelIdents, 5423 unsigned NumSelIdents); 5424 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5425 unsigned NumProtocols); 5426 void CodeCompleteObjCProtocolDecl(Scope *S); 5427 void CodeCompleteObjCInterfaceDecl(Scope *S); 5428 void CodeCompleteObjCSuperclass(Scope *S, 5429 IdentifierInfo *ClassName, 5430 SourceLocation ClassNameLoc); 5431 void CodeCompleteObjCImplementationDecl(Scope *S); 5432 void CodeCompleteObjCInterfaceCategory(Scope *S, 5433 IdentifierInfo *ClassName, 5434 SourceLocation ClassNameLoc); 5435 void CodeCompleteObjCImplementationCategory(Scope *S, 5436 IdentifierInfo *ClassName, 5437 SourceLocation ClassNameLoc); 5438 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5439 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5440 IdentifierInfo *PropertyName, 5441 Decl *ObjCImpDecl); 5442 void CodeCompleteObjCMethodDecl(Scope *S, 5443 bool IsInstanceMethod, 5444 ParsedType ReturnType, 5445 Decl *IDecl); 5446 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5447 bool IsInstanceMethod, 5448 bool AtParameterName, 5449 ParsedType ReturnType, 5450 IdentifierInfo **SelIdents, 5451 unsigned NumSelIdents); 5452 void CodeCompletePreprocessorDirective(bool InConditional); 5453 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5454 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5455 void CodeCompletePreprocessorExpression(); 5456 void CodeCompletePreprocessorMacroArgument(Scope *S, 5457 IdentifierInfo *Macro, 5458 MacroInfo *MacroInfo, 5459 unsigned Argument); 5460 void CodeCompleteNaturalLanguage(); 5461 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5462 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5463 //@} 5464 5465 void PrintStats() const {} 5466 5467 //===--------------------------------------------------------------------===// 5468 // Extra semantic analysis beyond the C type system 5469 5470public: 5471 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5472 unsigned ByteNo) const; 5473 5474private: 5475 void CheckArrayAccess(const Expr *E); 5476 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5477 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5478 5479 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5480 bool CheckObjCString(Expr *Arg); 5481 5482 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5483 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5484 5485 bool SemaBuiltinVAStart(CallExpr *TheCall); 5486 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5487 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5488 5489public: 5490 // Used by C++ template instantiation. 5491 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5492 5493private: 5494 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5495 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5496 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5497 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5498 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5499 llvm::APSInt &Result); 5500 5501 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5502 bool HasVAListArg, unsigned format_idx, 5503 unsigned firstDataArg, bool isPrintf); 5504 5505 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5506 const CallExpr *TheCall, bool HasVAListArg, 5507 unsigned format_idx, unsigned firstDataArg, 5508 bool isPrintf); 5509 5510 void CheckNonNullArguments(const NonNullAttr *NonNull, 5511 const Expr * const *ExprArgs, 5512 SourceLocation CallSiteLoc); 5513 5514 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5515 unsigned format_idx, unsigned firstDataArg, 5516 bool isPrintf); 5517 5518 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5519 SourceLocation ReturnLoc); 5520 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5521 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5522 5523 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5524 Expr *Init); 5525 5526 /// \brief The parser's current scope. 5527 /// 5528 /// The parser maintains this state here. 5529 Scope *CurScope; 5530 5531protected: 5532 friend class Parser; 5533 friend class InitializationSequence; 5534 5535 /// \brief Retrieve the parser's current scope. 5536 Scope *getCurScope() const { return CurScope; } 5537}; 5538 5539/// \brief RAII object that enters a new expression evaluation context. 5540class EnterExpressionEvaluationContext { 5541 Sema &Actions; 5542 5543public: 5544 EnterExpressionEvaluationContext(Sema &Actions, 5545 Sema::ExpressionEvaluationContext NewContext) 5546 : Actions(Actions) { 5547 Actions.PushExpressionEvaluationContext(NewContext); 5548 } 5549 5550 ~EnterExpressionEvaluationContext() { 5551 Actions.PopExpressionEvaluationContext(); 5552 } 5553}; 5554 5555} // end namespace clang 5556 5557#endif 5558