Sema.h revision b7d98d35ea723624345f06e5895ddce2e0388ef0
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "clang/Basic/ExpressionTraits.h" 31#include "llvm/ADT/OwningPtr.h" 32#include "llvm/ADT/SmallPtrSet.h" 33#include "llvm/ADT/SmallVector.h" 34#include <deque> 35#include <string> 36 37namespace llvm { 38 class APSInt; 39 template <typename ValueT> struct DenseMapInfo; 40 template <typename ValueT, typename ValueInfoT> class DenseSet; 41} 42 43namespace clang { 44 class ADLResult; 45 class ASTConsumer; 46 class ASTContext; 47 class ASTMutationListener; 48 class ArrayType; 49 class AttributeList; 50 class BlockDecl; 51 class CXXBasePath; 52 class CXXBasePaths; 53 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 54 class CXXConstructorDecl; 55 class CXXConversionDecl; 56 class CXXDestructorDecl; 57 class CXXFieldCollector; 58 class CXXMemberCallExpr; 59 class CXXMethodDecl; 60 class CXXScopeSpec; 61 class CXXTemporary; 62 class CXXTryStmt; 63 class CallExpr; 64 class ClassTemplateDecl; 65 class ClassTemplatePartialSpecializationDecl; 66 class ClassTemplateSpecializationDecl; 67 class CodeCompleteConsumer; 68 class CodeCompletionAllocator; 69 class CodeCompletionResult; 70 class Decl; 71 class DeclAccessPair; 72 class DeclContext; 73 class DeclRefExpr; 74 class DeclaratorDecl; 75 class DeducedTemplateArgument; 76 class DependentDiagnostic; 77 class DesignatedInitExpr; 78 class Designation; 79 class EnumConstantDecl; 80 class Expr; 81 class ExtVectorType; 82 class ExternalSemaSource; 83 class FormatAttr; 84 class FriendDecl; 85 class FunctionDecl; 86 class FunctionProtoType; 87 class FunctionTemplateDecl; 88 class ImplicitConversionSequence; 89 class InitListExpr; 90 class InitializationKind; 91 class InitializationSequence; 92 class InitializedEntity; 93 class IntegerLiteral; 94 class LabelStmt; 95 class LangOptions; 96 class LocalInstantiationScope; 97 class LookupResult; 98 class MacroInfo; 99 class MultiLevelTemplateArgumentList; 100 class NamedDecl; 101 class NonNullAttr; 102 class ObjCCategoryDecl; 103 class ObjCCategoryImplDecl; 104 class ObjCCompatibleAliasDecl; 105 class ObjCContainerDecl; 106 class ObjCImplDecl; 107 class ObjCImplementationDecl; 108 class ObjCInterfaceDecl; 109 class ObjCIvarDecl; 110 template <class T> class ObjCList; 111 class ObjCMethodDecl; 112 class ObjCPropertyDecl; 113 class ObjCProtocolDecl; 114 class OverloadCandidateSet; 115 class OverloadExpr; 116 class ParenListExpr; 117 class ParmVarDecl; 118 class Preprocessor; 119 class PseudoDestructorTypeStorage; 120 class QualType; 121 class StandardConversionSequence; 122 class Stmt; 123 class StringLiteral; 124 class SwitchStmt; 125 class TargetAttributesSema; 126 class TemplateArgument; 127 class TemplateArgumentList; 128 class TemplateArgumentLoc; 129 class TemplateDecl; 130 class TemplateParameterList; 131 class TemplatePartialOrderingContext; 132 class TemplateTemplateParmDecl; 133 class Token; 134 class TypeAliasDecl; 135 class TypedefDecl; 136 class TypedefNameDecl; 137 class TypeLoc; 138 class UnqualifiedId; 139 class UnresolvedLookupExpr; 140 class UnresolvedMemberExpr; 141 class UnresolvedSetImpl; 142 class UnresolvedSetIterator; 143 class UsingDecl; 144 class UsingShadowDecl; 145 class ValueDecl; 146 class VarDecl; 147 class VisibilityAttr; 148 class VisibleDeclConsumer; 149 class IndirectFieldDecl; 150 151namespace sema { 152 class AccessedEntity; 153 class BlockScopeInfo; 154 class DelayedDiagnostic; 155 class FunctionScopeInfo; 156 class TemplateDeductionInfo; 157} 158 159/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 160/// parsing. 161/// 162/// LocInfoType is a "transient" type, only needed for passing to/from Parser 163/// and Sema, when we want to preserve type source info for a parsed type. 164/// It will not participate in the type system semantics in any way. 165class LocInfoType : public Type { 166 enum { 167 // The last number that can fit in Type's TC. 168 // Avoids conflict with an existing Type class. 169 LocInfo = Type::TypeLast + 1 170 }; 171 172 TypeSourceInfo *DeclInfo; 173 174 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 175 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 176 ty->isVariablyModifiedType(), 177 ty->containsUnexpandedParameterPack()), 178 DeclInfo(TInfo) { 179 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 180 } 181 friend class Sema; 182 183public: 184 QualType getType() const { return getCanonicalTypeInternal(); } 185 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 186 187 void getAsStringInternal(std::string &Str, 188 const PrintingPolicy &Policy) const; 189 190 static bool classof(const Type *T) { 191 return T->getTypeClass() == (TypeClass)LocInfo; 192 } 193 static bool classof(const LocInfoType *) { return true; } 194}; 195 196// FIXME: No way to easily map from TemplateTypeParmTypes to 197// TemplateTypeParmDecls, so we have this horrible PointerUnion. 198typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 199 SourceLocation> UnexpandedParameterPack; 200 201/// Sema - This implements semantic analysis and AST building for C. 202class Sema { 203 Sema(const Sema&); // DO NOT IMPLEMENT 204 void operator=(const Sema&); // DO NOT IMPLEMENT 205 mutable const TargetAttributesSema* TheTargetAttributesSema; 206public: 207 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 208 typedef OpaquePtr<TemplateName> TemplateTy; 209 typedef OpaquePtr<QualType> TypeTy; 210 typedef Attr AttrTy; 211 typedef CXXBaseSpecifier BaseTy; 212 typedef CXXCtorInitializer MemInitTy; 213 typedef Expr ExprTy; 214 typedef Stmt StmtTy; 215 typedef TemplateParameterList TemplateParamsTy; 216 typedef NestedNameSpecifier CXXScopeTy; 217 218 OpenCLOptions OpenCLFeatures; 219 FPOptions FPFeatures; 220 221 const LangOptions &LangOpts; 222 Preprocessor &PP; 223 ASTContext &Context; 224 ASTConsumer &Consumer; 225 Diagnostic &Diags; 226 SourceManager &SourceMgr; 227 228 /// \brief Source of additional semantic information. 229 ExternalSemaSource *ExternalSource; 230 231 /// \brief Code-completion consumer. 232 CodeCompleteConsumer *CodeCompleter; 233 234 /// CurContext - This is the current declaration context of parsing. 235 DeclContext *CurContext; 236 237 /// VAListTagName - The declaration name corresponding to __va_list_tag. 238 /// This is used as part of a hack to omit that class from ADL results. 239 DeclarationName VAListTagName; 240 241 /// PackContext - Manages the stack for #pragma pack. An alignment 242 /// of 0 indicates default alignment. 243 void *PackContext; // Really a "PragmaPackStack*" 244 245 bool MSStructPragmaOn; // True when #pragma ms_struct on 246 247 /// VisContext - Manages the stack for #pragma GCC visibility. 248 void *VisContext; // Really a "PragmaVisStack*" 249 250 /// \brief Stack containing information about each of the nested 251 /// function, block, and method scopes that are currently active. 252 /// 253 /// This array is never empty. Clients should ignore the first 254 /// element, which is used to cache a single FunctionScopeInfo 255 /// that's used to parse every top-level function. 256 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 257 258 /// ExprTemporaries - This is the stack of temporaries that are created by 259 /// the current full expression. 260 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 261 262 /// ExtVectorDecls - This is a list all the extended vector types. This allows 263 /// us to associate a raw vector type with one of the ext_vector type names. 264 /// This is only necessary for issuing pretty diagnostics. 265 llvm::SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 266 267 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 268 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 269 270 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 271 272 /// PureVirtualClassDiagSet - a set of class declarations which we have 273 /// emitted a list of pure virtual functions. Used to prevent emitting the 274 /// same list more than once. 275 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 276 277 /// ParsingInitForAutoVars - a set of declarations with auto types for which 278 /// we are currently parsing the initializer. 279 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 280 281 /// \brief A mapping from external names to the most recent 282 /// locally-scoped external declaration with that name. 283 /// 284 /// This map contains external declarations introduced in local 285 /// scoped, e.g., 286 /// 287 /// \code 288 /// void f() { 289 /// void foo(int, int); 290 /// } 291 /// \endcode 292 /// 293 /// Here, the name "foo" will be associated with the declaration on 294 /// "foo" within f. This name is not visible outside of 295 /// "f". However, we still find it in two cases: 296 /// 297 /// - If we are declaring another external with the name "foo", we 298 /// can find "foo" as a previous declaration, so that the types 299 /// of this external declaration can be checked for 300 /// compatibility. 301 /// 302 /// - If we would implicitly declare "foo" (e.g., due to a call to 303 /// "foo" in C when no prototype or definition is visible), then 304 /// we find this declaration of "foo" and complain that it is 305 /// not visible. 306 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 307 308 /// \brief All the tentative definitions encountered in the TU. 309 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 310 311 /// \brief The set of file scoped decls seen so far that have not been used 312 /// and must warn if not used. Only contains the first declaration. 313 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 314 315 /// \brief Callback to the parser to parse templated functions when needed. 316 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 317 LateTemplateParserCB *LateTemplateParser; 318 void *OpaqueParser; 319 320 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 321 LateTemplateParser = LTP; 322 OpaqueParser = P; 323 } 324 325 class DelayedDiagnostics; 326 327 class ParsingDeclState { 328 unsigned SavedStackSize; 329 friend class Sema::DelayedDiagnostics; 330 }; 331 332 class ProcessingContextState { 333 unsigned SavedParsingDepth; 334 unsigned SavedActiveStackBase; 335 friend class Sema::DelayedDiagnostics; 336 }; 337 338 /// A class which encapsulates the logic for delaying diagnostics 339 /// during parsing and other processing. 340 class DelayedDiagnostics { 341 /// \brief The stack of diagnostics that were delayed due to being 342 /// produced during the parsing of a declaration. 343 sema::DelayedDiagnostic *Stack; 344 345 /// \brief The number of objects on the delayed-diagnostics stack. 346 unsigned StackSize; 347 348 /// \brief The current capacity of the delayed-diagnostics stack. 349 unsigned StackCapacity; 350 351 /// \brief The index of the first "active" delayed diagnostic in 352 /// the stack. When parsing class definitions, we ignore active 353 /// delayed diagnostics from the surrounding context. 354 unsigned ActiveStackBase; 355 356 /// \brief The depth of the declarations we're currently parsing. 357 /// This gets saved and reset whenever we enter a class definition. 358 unsigned ParsingDepth; 359 360 public: 361 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 362 ActiveStackBase(0), ParsingDepth(0) {} 363 364 ~DelayedDiagnostics() { 365 delete[] reinterpret_cast<char*>(Stack); 366 } 367 368 /// Adds a delayed diagnostic. 369 void add(const sema::DelayedDiagnostic &diag); 370 371 /// Determines whether diagnostics should be delayed. 372 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 373 374 /// Observe that we've started parsing a declaration. Access and 375 /// deprecation diagnostics will be delayed; when the declaration 376 /// is completed, all active delayed diagnostics will be evaluated 377 /// in its context, and then active diagnostics stack will be 378 /// popped down to the saved depth. 379 ParsingDeclState pushParsingDecl() { 380 ParsingDepth++; 381 382 ParsingDeclState state; 383 state.SavedStackSize = StackSize; 384 return state; 385 } 386 387 /// Observe that we're completed parsing a declaration. 388 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 389 390 /// Observe that we've started processing a different context, the 391 /// contents of which are semantically separate from the 392 /// declarations it may lexically appear in. This sets aside the 393 /// current stack of active diagnostics and starts afresh. 394 ProcessingContextState pushContext() { 395 assert(StackSize >= ActiveStackBase); 396 397 ProcessingContextState state; 398 state.SavedParsingDepth = ParsingDepth; 399 state.SavedActiveStackBase = ActiveStackBase; 400 401 ActiveStackBase = StackSize; 402 ParsingDepth = 0; 403 404 return state; 405 } 406 407 /// Observe that we've stopped processing a context. This 408 /// restores the previous stack of active diagnostics. 409 void popContext(ProcessingContextState state) { 410 assert(ActiveStackBase == StackSize); 411 assert(ParsingDepth == 0); 412 ActiveStackBase = state.SavedActiveStackBase; 413 ParsingDepth = state.SavedParsingDepth; 414 } 415 } DelayedDiagnostics; 416 417 /// A RAII object to temporarily push a declaration context. 418 class ContextRAII { 419 private: 420 Sema &S; 421 DeclContext *SavedContext; 422 ProcessingContextState SavedContextState; 423 424 public: 425 ContextRAII(Sema &S, DeclContext *ContextToPush) 426 : S(S), SavedContext(S.CurContext), 427 SavedContextState(S.DelayedDiagnostics.pushContext()) 428 { 429 assert(ContextToPush && "pushing null context"); 430 S.CurContext = ContextToPush; 431 } 432 433 void pop() { 434 if (!SavedContext) return; 435 S.CurContext = SavedContext; 436 S.DelayedDiagnostics.popContext(SavedContextState); 437 SavedContext = 0; 438 } 439 440 ~ContextRAII() { 441 pop(); 442 } 443 }; 444 445 /// WeakUndeclaredIdentifiers - Identifiers contained in 446 /// #pragma weak before declared. rare. may alias another 447 /// identifier, declared or undeclared 448 class WeakInfo { 449 IdentifierInfo *alias; // alias (optional) 450 SourceLocation loc; // for diagnostics 451 bool used; // identifier later declared? 452 public: 453 WeakInfo() 454 : alias(0), loc(SourceLocation()), used(false) {} 455 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 456 : alias(Alias), loc(Loc), used(false) {} 457 inline IdentifierInfo * getAlias() const { return alias; } 458 inline SourceLocation getLocation() const { return loc; } 459 void setUsed(bool Used=true) { used = Used; } 460 inline bool getUsed() { return used; } 461 bool operator==(WeakInfo RHS) const { 462 return alias == RHS.getAlias() && loc == RHS.getLocation(); 463 } 464 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 465 }; 466 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 467 468 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 469 /// #pragma weak during processing of other Decls. 470 /// I couldn't figure out a clean way to generate these in-line, so 471 /// we store them here and handle separately -- which is a hack. 472 /// It would be best to refactor this. 473 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 474 475 IdentifierResolver IdResolver; 476 477 /// Translation Unit Scope - useful to Objective-C actions that need 478 /// to lookup file scope declarations in the "ordinary" C decl namespace. 479 /// For example, user-defined classes, built-in "id" type, etc. 480 Scope *TUScope; 481 482 /// \brief The C++ "std" namespace, where the standard library resides. 483 LazyDeclPtr StdNamespace; 484 485 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 486 /// standard library. 487 LazyDeclPtr StdBadAlloc; 488 489 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 490 RecordDecl *CXXTypeInfoDecl; 491 492 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 493 RecordDecl *MSVCGuidDecl; 494 495 /// A flag to remember whether the implicit forms of operator new and delete 496 /// have been declared. 497 bool GlobalNewDeleteDeclared; 498 499 /// \brief The set of declarations that have been referenced within 500 /// a potentially evaluated expression. 501 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 502 PotentiallyReferencedDecls; 503 504 /// \brief A set of diagnostics that may be emitted. 505 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 506 PotentiallyEmittedDiagnostics; 507 508 /// \brief Describes how the expressions currently being parsed are 509 /// evaluated at run-time, if at all. 510 enum ExpressionEvaluationContext { 511 /// \brief The current expression and its subexpressions occur within an 512 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 513 /// or the subexpression of \c sizeof, where the type or the value of the 514 /// expression may be significant but no code will be generated to evaluate 515 /// the value of the expression at run time. 516 Unevaluated, 517 518 /// \brief The current expression is potentially evaluated at run time, 519 /// which means that code may be generated to evaluate the value of the 520 /// expression at run time. 521 PotentiallyEvaluated, 522 523 /// \brief The current expression may be potentially evaluated or it may 524 /// be unevaluated, but it is impossible to tell from the lexical context. 525 /// This evaluation context is used primary for the operand of the C++ 526 /// \c typeid expression, whose argument is potentially evaluated only when 527 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 528 PotentiallyPotentiallyEvaluated, 529 530 /// \brief The current expression is potentially evaluated, but any 531 /// declarations referenced inside that expression are only used if 532 /// in fact the current expression is used. 533 /// 534 /// This value is used when parsing default function arguments, for which 535 /// we would like to provide diagnostics (e.g., passing non-POD arguments 536 /// through varargs) but do not want to mark declarations as "referenced" 537 /// until the default argument is used. 538 PotentiallyEvaluatedIfUsed 539 }; 540 541 /// \brief Data structure used to record current or nested 542 /// expression evaluation contexts. 543 struct ExpressionEvaluationContextRecord { 544 /// \brief The expression evaluation context. 545 ExpressionEvaluationContext Context; 546 547 /// \brief The number of temporaries that were active when we 548 /// entered this expression evaluation context. 549 unsigned NumTemporaries; 550 551 /// \brief The set of declarations referenced within a 552 /// potentially potentially-evaluated context. 553 /// 554 /// When leaving a potentially potentially-evaluated context, each 555 /// of these elements will be as referenced if the corresponding 556 /// potentially potentially evaluated expression is potentially 557 /// evaluated. 558 PotentiallyReferencedDecls *PotentiallyReferenced; 559 560 /// \brief The set of diagnostics to emit should this potentially 561 /// potentially-evaluated context become evaluated. 562 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 563 564 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 565 unsigned NumTemporaries) 566 : Context(Context), NumTemporaries(NumTemporaries), 567 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 568 569 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 570 if (!PotentiallyReferenced) 571 PotentiallyReferenced = new PotentiallyReferencedDecls; 572 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 573 } 574 575 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 576 if (!PotentiallyDiagnosed) 577 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 578 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 579 } 580 581 void Destroy() { 582 delete PotentiallyReferenced; 583 delete PotentiallyDiagnosed; 584 PotentiallyReferenced = 0; 585 PotentiallyDiagnosed = 0; 586 } 587 }; 588 589 /// A stack of expression evaluation contexts. 590 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 591 592 /// \brief Whether the code handled by Sema should be considered a 593 /// complete translation unit or not. 594 /// 595 /// When true (which is generally the case), Sema will perform 596 /// end-of-translation-unit semantic tasks (such as creating 597 /// initializers for tentative definitions in C) once parsing has 598 /// completed. This flag will be false when building PCH files, 599 /// since a PCH file is by definition not a complete translation 600 /// unit. 601 bool CompleteTranslationUnit; 602 603 llvm::BumpPtrAllocator BumpAlloc; 604 605 /// \brief The number of SFINAE diagnostics that have been trapped. 606 unsigned NumSFINAEErrors; 607 608 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 609 UnparsedDefaultArgInstantiationsMap; 610 611 /// \brief A mapping from parameters with unparsed default arguments to the 612 /// set of instantiations of each parameter. 613 /// 614 /// This mapping is a temporary data structure used when parsing 615 /// nested class templates or nested classes of class templates, 616 /// where we might end up instantiating an inner class before the 617 /// default arguments of its methods have been parsed. 618 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 619 620 // Contains the locations of the beginning of unparsed default 621 // argument locations. 622 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 623 624 /// UndefinedInternals - all the used, undefined objects with 625 /// internal linkage in this translation unit. 626 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 627 628 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 629 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 630 631 /// Method Pool - allows efficient lookup when typechecking messages to "id". 632 /// We need to maintain a list, since selectors can have differing signatures 633 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 634 /// of selectors are "overloaded"). 635 GlobalMethodPool MethodPool; 636 637 /// Method selectors used in a @selector expression. Used for implementation 638 /// of -Wselector. 639 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 640 641 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 642 643 /// Private Helper predicate to check for 'self'. 644 bool isSelfExpr(Expr *RExpr); 645public: 646 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 647 bool CompleteTranslationUnit = true, 648 CodeCompleteConsumer *CompletionConsumer = 0); 649 ~Sema(); 650 651 /// \brief Perform initialization that occurs after the parser has been 652 /// initialized but before it parses anything. 653 void Initialize(); 654 655 const LangOptions &getLangOptions() const { return LangOpts; } 656 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 657 FPOptions &getFPOptions() { return FPFeatures; } 658 659 Diagnostic &getDiagnostics() const { return Diags; } 660 SourceManager &getSourceManager() const { return SourceMgr; } 661 const TargetAttributesSema &getTargetAttributesSema() const; 662 Preprocessor &getPreprocessor() const { return PP; } 663 ASTContext &getASTContext() const { return Context; } 664 ASTConsumer &getASTConsumer() const { return Consumer; } 665 ASTMutationListener *getASTMutationListener() const; 666 667 /// \brief Helper class that creates diagnostics with optional 668 /// template instantiation stacks. 669 /// 670 /// This class provides a wrapper around the basic DiagnosticBuilder 671 /// class that emits diagnostics. SemaDiagnosticBuilder is 672 /// responsible for emitting the diagnostic (as DiagnosticBuilder 673 /// does) and, if the diagnostic comes from inside a template 674 /// instantiation, printing the template instantiation stack as 675 /// well. 676 class SemaDiagnosticBuilder : public DiagnosticBuilder { 677 Sema &SemaRef; 678 unsigned DiagID; 679 680 public: 681 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 682 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 683 684 explicit SemaDiagnosticBuilder(Sema &SemaRef) 685 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 686 687 ~SemaDiagnosticBuilder(); 688 }; 689 690 /// \brief Emit a diagnostic. 691 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 692 693 /// \brief Emit a partial diagnostic. 694 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 695 696 /// \brief Build a partial diagnostic. 697 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 698 699 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 700 701 ExprResult Owned(Expr* E) { return E; } 702 ExprResult Owned(ExprResult R) { return R; } 703 StmtResult Owned(Stmt* S) { return S; } 704 705 void ActOnEndOfTranslationUnit(); 706 707 Scope *getScopeForContext(DeclContext *Ctx); 708 709 void PushFunctionScope(); 710 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 711 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 712 const Decl *D = 0, const BlockExpr *blkExpr = 0); 713 714 sema::FunctionScopeInfo *getCurFunction() const { 715 return FunctionScopes.back(); 716 } 717 718 bool hasAnyErrorsInThisFunction() const; 719 720 /// \brief Retrieve the current block, if any. 721 sema::BlockScopeInfo *getCurBlock(); 722 723 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 724 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 725 726 //===--------------------------------------------------------------------===// 727 // Type Analysis / Processing: SemaType.cpp. 728 // 729 730 QualType adjustParameterType(QualType T); 731 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 732 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 733 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 734 } 735 QualType BuildPointerType(QualType T, 736 SourceLocation Loc, DeclarationName Entity); 737 QualType BuildReferenceType(QualType T, bool LValueRef, 738 SourceLocation Loc, DeclarationName Entity); 739 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 740 Expr *ArraySize, unsigned Quals, 741 SourceRange Brackets, DeclarationName Entity); 742 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 743 SourceLocation AttrLoc); 744 QualType BuildFunctionType(QualType T, 745 QualType *ParamTypes, unsigned NumParamTypes, 746 bool Variadic, unsigned Quals, 747 RefQualifierKind RefQualifier, 748 SourceLocation Loc, DeclarationName Entity, 749 FunctionType::ExtInfo Info); 750 QualType BuildMemberPointerType(QualType T, QualType Class, 751 SourceLocation Loc, 752 DeclarationName Entity); 753 QualType BuildBlockPointerType(QualType T, 754 SourceLocation Loc, DeclarationName Entity); 755 QualType BuildParenType(QualType T); 756 757 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 758 TagDecl **OwnedDecl = 0, 759 bool AllowAutoInTypeName = false); 760 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 761 TypeSourceInfo *ReturnTypeInfo); 762 /// \brief Package the given type and TSI into a ParsedType. 763 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 764 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 765 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 766 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 767 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 768 bool CheckDistantExceptionSpec(QualType T); 769 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 770 bool CheckEquivalentExceptionSpec( 771 const FunctionProtoType *Old, SourceLocation OldLoc, 772 const FunctionProtoType *New, SourceLocation NewLoc); 773 bool CheckEquivalentExceptionSpec( 774 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 775 const FunctionProtoType *Old, SourceLocation OldLoc, 776 const FunctionProtoType *New, SourceLocation NewLoc, 777 bool *MissingExceptionSpecification = 0, 778 bool *MissingEmptyExceptionSpecification = 0, 779 bool AllowNoexceptAllMatchWithNoSpec = false, 780 bool IsOperatorNew = false); 781 bool CheckExceptionSpecSubset( 782 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 783 const FunctionProtoType *Superset, SourceLocation SuperLoc, 784 const FunctionProtoType *Subset, SourceLocation SubLoc); 785 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 786 const FunctionProtoType *Target, SourceLocation TargetLoc, 787 const FunctionProtoType *Source, SourceLocation SourceLoc); 788 789 TypeResult ActOnTypeName(Scope *S, Declarator &D); 790 791 bool RequireCompleteType(SourceLocation Loc, QualType T, 792 const PartialDiagnostic &PD, 793 std::pair<SourceLocation, PartialDiagnostic> Note); 794 bool RequireCompleteType(SourceLocation Loc, QualType T, 795 const PartialDiagnostic &PD); 796 bool RequireCompleteType(SourceLocation Loc, QualType T, 797 unsigned DiagID); 798 799 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 800 const CXXScopeSpec &SS, QualType T); 801 802 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 803 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 804 805 //===--------------------------------------------------------------------===// 806 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 807 // 808 809 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 810 811 void DiagnoseUseOfUnimplementedSelectors(); 812 813 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 814 Scope *S, CXXScopeSpec *SS = 0, 815 bool isClassName = false, 816 bool HasTrailingDot = false, 817 ParsedType ObjectType = ParsedType(), 818 bool WantNontrivialTypeSourceInfo = false); 819 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 820 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 821 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 822 SourceLocation IILoc, 823 Scope *S, 824 CXXScopeSpec *SS, 825 ParsedType &SuggestedType); 826 827 /// \brief Describes the result of the name lookup and resolution performed 828 /// by \c ClassifyName(). 829 enum NameClassificationKind { 830 NC_Unknown, 831 NC_Error, 832 NC_Keyword, 833 NC_Type, 834 NC_Expression, 835 NC_NestedNameSpecifier, 836 NC_TypeTemplate, 837 NC_FunctionTemplate 838 }; 839 840 class NameClassification { 841 NameClassificationKind Kind; 842 ExprResult Expr; 843 TemplateName Template; 844 ParsedType Type; 845 const IdentifierInfo *Keyword; 846 847 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 848 849 public: 850 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 851 852 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 853 854 NameClassification(const IdentifierInfo *Keyword) 855 : Kind(NC_Keyword), Keyword(Keyword) { } 856 857 static NameClassification Error() { 858 return NameClassification(NC_Error); 859 } 860 861 static NameClassification Unknown() { 862 return NameClassification(NC_Unknown); 863 } 864 865 static NameClassification NestedNameSpecifier() { 866 return NameClassification(NC_NestedNameSpecifier); 867 } 868 869 static NameClassification TypeTemplate(TemplateName Name) { 870 NameClassification Result(NC_TypeTemplate); 871 Result.Template = Name; 872 return Result; 873 } 874 875 static NameClassification FunctionTemplate(TemplateName Name) { 876 NameClassification Result(NC_FunctionTemplate); 877 Result.Template = Name; 878 return Result; 879 } 880 881 NameClassificationKind getKind() const { return Kind; } 882 883 ParsedType getType() const { 884 assert(Kind == NC_Type); 885 return Type; 886 } 887 888 ExprResult getExpression() const { 889 assert(Kind == NC_Expression); 890 return Expr; 891 } 892 893 TemplateName getTemplateName() const { 894 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 895 return Template; 896 } 897 898 TemplateNameKind getTemplateNameKind() const { 899 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 900 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 901 } 902}; 903 904 /// \brief Perform name lookup on the given name, classifying it based on 905 /// the results of name lookup and the following token. 906 /// 907 /// This routine is used by the parser to resolve identifiers and help direct 908 /// parsing. When the identifier cannot be found, this routine will attempt 909 /// to correct the typo and classify based on the resulting name. 910 /// 911 /// \param S The scope in which we're performing name lookup. 912 /// 913 /// \param SS The nested-name-specifier that precedes the name. 914 /// 915 /// \param Name The identifier. If typo correction finds an alternative name, 916 /// this pointer parameter will be updated accordingly. 917 /// 918 /// \param NameLoc The location of the identifier. 919 /// 920 /// \param NextToken The token following the identifier. Used to help 921 /// disambiguate the name. 922 NameClassification ClassifyName(Scope *S, 923 CXXScopeSpec &SS, 924 IdentifierInfo *&Name, 925 SourceLocation NameLoc, 926 const Token &NextToken); 927 928 Decl *ActOnDeclarator(Scope *S, Declarator &D); 929 930 Decl *HandleDeclarator(Scope *S, Declarator &D, 931 MultiTemplateParamsArg TemplateParameterLists, 932 bool IsFunctionDefinition); 933 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 934 const LookupResult &Previous, 935 Scope *S); 936 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 937 void DiagnoseFunctionSpecifiers(Declarator& D); 938 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 939 void CheckShadow(Scope *S, VarDecl *D); 940 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 941 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 942 QualType R, TypeSourceInfo *TInfo, 943 LookupResult &Previous, bool &Redeclaration); 944 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 945 LookupResult &Previous, bool &Redeclaration); 946 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 947 QualType R, TypeSourceInfo *TInfo, 948 LookupResult &Previous, 949 MultiTemplateParamsArg TemplateParamLists, 950 bool &Redeclaration); 951 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 952 bool &Redeclaration); 953 void CheckCompleteVariableDeclaration(VarDecl *var); 954 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 955 QualType R, TypeSourceInfo *TInfo, 956 LookupResult &Previous, 957 MultiTemplateParamsArg TemplateParamLists, 958 bool IsFunctionDefinition, 959 bool &Redeclaration); 960 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 961 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 962 void CheckFunctionDeclaration(Scope *S, 963 FunctionDecl *NewFD, LookupResult &Previous, 964 bool IsExplicitSpecialization, 965 bool &Redeclaration); 966 void CheckMain(FunctionDecl *FD); 967 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 968 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 969 SourceLocation Loc, 970 QualType T); 971 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 972 SourceLocation NameLoc, IdentifierInfo *Name, 973 QualType T, TypeSourceInfo *TSInfo, 974 StorageClass SC, StorageClass SCAsWritten); 975 void ActOnParamDefaultArgument(Decl *param, 976 SourceLocation EqualLoc, 977 Expr *defarg); 978 void ActOnParamUnparsedDefaultArgument(Decl *param, 979 SourceLocation EqualLoc, 980 SourceLocation ArgLoc); 981 void ActOnParamDefaultArgumentError(Decl *param); 982 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 983 SourceLocation EqualLoc); 984 985 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 986 bool TypeMayContainAuto); 987 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 988 void ActOnInitializerError(Decl *Dcl); 989 void ActOnCXXForRangeDecl(Decl *D); 990 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 991 void FinalizeDeclaration(Decl *D); 992 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 993 Decl **Group, 994 unsigned NumDecls); 995 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 996 bool TypeMayContainAuto = true); 997 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 998 SourceLocation LocAfterDecls); 999 void CheckForFunctionRedefinition(FunctionDecl *FD); 1000 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1001 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1002 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1003 1004 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1005 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1006 1007 /// \brief Diagnose any unused parameters in the given sequence of 1008 /// ParmVarDecl pointers. 1009 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1010 ParmVarDecl * const *End); 1011 1012 /// \brief Diagnose whether the size of parameters or return value of a 1013 /// function or obj-c method definition is pass-by-value and larger than a 1014 /// specified threshold. 1015 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1016 ParmVarDecl * const *End, 1017 QualType ReturnTy, 1018 NamedDecl *D); 1019 1020 void DiagnoseInvalidJumps(Stmt *Body); 1021 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1022 SourceLocation AsmLoc, 1023 SourceLocation RParenLoc); 1024 1025 /// Scope actions. 1026 void ActOnPopScope(SourceLocation Loc, Scope *S); 1027 void ActOnTranslationUnitScope(Scope *S); 1028 1029 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 1030 /// no declarator (e.g. "struct foo;") is parsed. 1031 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1032 DeclSpec &DS); 1033 1034 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1035 1036 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1037 AccessSpecifier AS, 1038 RecordDecl *Record); 1039 1040 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1041 RecordDecl *Record); 1042 1043 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1044 TagTypeKind NewTag, 1045 SourceLocation NewTagLoc, 1046 const IdentifierInfo &Name); 1047 1048 enum TagUseKind { 1049 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1050 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1051 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1052 TUK_Friend // Friend declaration: 'friend struct foo;' 1053 }; 1054 1055 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1056 SourceLocation KWLoc, CXXScopeSpec &SS, 1057 IdentifierInfo *Name, SourceLocation NameLoc, 1058 AttributeList *Attr, AccessSpecifier AS, 1059 MultiTemplateParamsArg TemplateParameterLists, 1060 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1061 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1062 1063 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1064 unsigned TagSpec, SourceLocation TagLoc, 1065 CXXScopeSpec &SS, 1066 IdentifierInfo *Name, SourceLocation NameLoc, 1067 AttributeList *Attr, 1068 MultiTemplateParamsArg TempParamLists); 1069 1070 TypeResult ActOnDependentTag(Scope *S, 1071 unsigned TagSpec, 1072 TagUseKind TUK, 1073 const CXXScopeSpec &SS, 1074 IdentifierInfo *Name, 1075 SourceLocation TagLoc, 1076 SourceLocation NameLoc); 1077 1078 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1079 IdentifierInfo *ClassName, 1080 llvm::SmallVectorImpl<Decl *> &Decls); 1081 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1082 Declarator &D, Expr *BitfieldWidth); 1083 1084 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1085 Declarator &D, Expr *BitfieldWidth, 1086 AccessSpecifier AS); 1087 1088 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1089 TypeSourceInfo *TInfo, 1090 RecordDecl *Record, SourceLocation Loc, 1091 bool Mutable, Expr *BitfieldWidth, 1092 SourceLocation TSSL, 1093 AccessSpecifier AS, NamedDecl *PrevDecl, 1094 Declarator *D = 0); 1095 1096 enum CXXSpecialMember { 1097 CXXInvalid = -1, 1098 CXXConstructor = 0, 1099 CXXCopyConstructor = 1, 1100 CXXCopyAssignment = 2, 1101 CXXDestructor = 3 1102 }; 1103 bool CheckNontrivialField(FieldDecl *FD); 1104 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1105 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1106 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1107 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 1108 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1109 Declarator &D, Expr *BitfieldWidth, 1110 tok::ObjCKeywordKind visibility); 1111 1112 // This is used for both record definitions and ObjC interface declarations. 1113 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1114 Decl **Fields, unsigned NumFields, 1115 SourceLocation LBrac, SourceLocation RBrac, 1116 AttributeList *AttrList); 1117 1118 /// ActOnTagStartDefinition - Invoked when we have entered the 1119 /// scope of a tag's definition (e.g., for an enumeration, class, 1120 /// struct, or union). 1121 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1122 1123 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1124 /// C++ record definition's base-specifiers clause and are starting its 1125 /// member declarations. 1126 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1127 SourceLocation FinalLoc, 1128 SourceLocation LBraceLoc); 1129 1130 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1131 /// the definition of a tag (enumeration, class, struct, or union). 1132 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1133 SourceLocation RBraceLoc); 1134 1135 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1136 /// error parsing the definition of a tag. 1137 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1138 1139 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1140 EnumConstantDecl *LastEnumConst, 1141 SourceLocation IdLoc, 1142 IdentifierInfo *Id, 1143 Expr *val); 1144 1145 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1146 SourceLocation IdLoc, IdentifierInfo *Id, 1147 AttributeList *Attrs, 1148 SourceLocation EqualLoc, Expr *Val); 1149 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1150 SourceLocation RBraceLoc, Decl *EnumDecl, 1151 Decl **Elements, unsigned NumElements, 1152 Scope *S, AttributeList *Attr); 1153 1154 DeclContext *getContainingDC(DeclContext *DC); 1155 1156 /// Set the current declaration context until it gets popped. 1157 void PushDeclContext(Scope *S, DeclContext *DC); 1158 void PopDeclContext(); 1159 1160 /// EnterDeclaratorContext - Used when we must lookup names in the context 1161 /// of a declarator's nested name specifier. 1162 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1163 void ExitDeclaratorContext(Scope *S); 1164 1165 DeclContext *getFunctionLevelDeclContext(); 1166 1167 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1168 /// to the function decl for the function being parsed. If we're currently 1169 /// in a 'block', this returns the containing context. 1170 FunctionDecl *getCurFunctionDecl(); 1171 1172 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1173 /// the method decl for the method being parsed. If we're currently 1174 /// in a 'block', this returns the containing context. 1175 ObjCMethodDecl *getCurMethodDecl(); 1176 1177 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1178 /// or C function we're in, otherwise return null. If we're currently 1179 /// in a 'block', this returns the containing context. 1180 NamedDecl *getCurFunctionOrMethodDecl(); 1181 1182 /// Add this decl to the scope shadowed decl chains. 1183 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1184 1185 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1186 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1187 /// true if 'D' belongs to the given declaration context. 1188 /// 1189 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1190 /// whether the declaration is in scope for the purposes of explicit template 1191 /// instantiation or specialization. The default is false. 1192 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1193 bool ExplicitInstantiationOrSpecialization = false); 1194 1195 /// Finds the scope corresponding to the given decl context, if it 1196 /// happens to be an enclosing scope. Otherwise return NULL. 1197 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1198 1199 /// Subroutines of ActOnDeclarator(). 1200 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1201 TypeSourceInfo *TInfo); 1202 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1203 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1204 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1205 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1206 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1207 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1208 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1209 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1210 1211 // AssignmentAction - This is used by all the assignment diagnostic functions 1212 // to represent what is actually causing the operation 1213 enum AssignmentAction { 1214 AA_Assigning, 1215 AA_Passing, 1216 AA_Returning, 1217 AA_Converting, 1218 AA_Initializing, 1219 AA_Sending, 1220 AA_Casting 1221 }; 1222 1223 /// C++ Overloading. 1224 enum OverloadKind { 1225 /// This is a legitimate overload: the existing declarations are 1226 /// functions or function templates with different signatures. 1227 Ovl_Overload, 1228 1229 /// This is not an overload because the signature exactly matches 1230 /// an existing declaration. 1231 Ovl_Match, 1232 1233 /// This is not an overload because the lookup results contain a 1234 /// non-function. 1235 Ovl_NonFunction 1236 }; 1237 OverloadKind CheckOverload(Scope *S, 1238 FunctionDecl *New, 1239 const LookupResult &OldDecls, 1240 NamedDecl *&OldDecl, 1241 bool IsForUsingDecl); 1242 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1243 1244 bool TryImplicitConversion(InitializationSequence &Sequence, 1245 const InitializedEntity &Entity, 1246 Expr *From, 1247 bool SuppressUserConversions, 1248 bool AllowExplicit, 1249 bool InOverloadResolution, 1250 bool CStyle); 1251 1252 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1253 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1254 bool IsComplexPromotion(QualType FromType, QualType ToType); 1255 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1256 bool InOverloadResolution, 1257 QualType& ConvertedType, bool &IncompatibleObjC); 1258 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1259 QualType& ConvertedType, bool &IncompatibleObjC); 1260 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1261 QualType& ConvertedType); 1262 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1263 const FunctionProtoType *NewType); 1264 1265 bool CheckPointerConversion(Expr *From, QualType ToType, 1266 CastKind &Kind, 1267 CXXCastPath& BasePath, 1268 bool IgnoreBaseAccess); 1269 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1270 bool InOverloadResolution, 1271 QualType &ConvertedType); 1272 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1273 CastKind &Kind, 1274 CXXCastPath &BasePath, 1275 bool IgnoreBaseAccess); 1276 bool IsQualificationConversion(QualType FromType, QualType ToType, 1277 bool CStyle); 1278 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1279 1280 1281 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1282 const VarDecl *NRVOCandidate, 1283 QualType ResultType, 1284 Expr *Value); 1285 1286 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1287 SourceLocation EqualLoc, 1288 ExprResult Init); 1289 ExprResult PerformObjectArgumentInitialization(Expr *From, 1290 NestedNameSpecifier *Qualifier, 1291 NamedDecl *FoundDecl, 1292 CXXMethodDecl *Method); 1293 1294 ExprResult PerformContextuallyConvertToBool(Expr *From); 1295 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1296 1297 ExprResult 1298 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1299 const PartialDiagnostic &NotIntDiag, 1300 const PartialDiagnostic &IncompleteDiag, 1301 const PartialDiagnostic &ExplicitConvDiag, 1302 const PartialDiagnostic &ExplicitConvNote, 1303 const PartialDiagnostic &AmbigDiag, 1304 const PartialDiagnostic &AmbigNote, 1305 const PartialDiagnostic &ConvDiag); 1306 1307 ExprResult PerformObjectMemberConversion(Expr *From, 1308 NestedNameSpecifier *Qualifier, 1309 NamedDecl *FoundDecl, 1310 NamedDecl *Member); 1311 1312 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1313 // TODO: make this is a typesafe union. 1314 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1315 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1316 1317 void AddOverloadCandidate(NamedDecl *Function, 1318 DeclAccessPair FoundDecl, 1319 Expr **Args, unsigned NumArgs, 1320 OverloadCandidateSet &CandidateSet); 1321 1322 void AddOverloadCandidate(FunctionDecl *Function, 1323 DeclAccessPair FoundDecl, 1324 Expr **Args, unsigned NumArgs, 1325 OverloadCandidateSet& CandidateSet, 1326 bool SuppressUserConversions = false, 1327 bool PartialOverloading = false); 1328 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1329 Expr **Args, unsigned NumArgs, 1330 OverloadCandidateSet& CandidateSet, 1331 bool SuppressUserConversions = false); 1332 void AddMethodCandidate(DeclAccessPair FoundDecl, 1333 QualType ObjectType, 1334 Expr::Classification ObjectClassification, 1335 Expr **Args, unsigned NumArgs, 1336 OverloadCandidateSet& CandidateSet, 1337 bool SuppressUserConversion = false); 1338 void AddMethodCandidate(CXXMethodDecl *Method, 1339 DeclAccessPair FoundDecl, 1340 CXXRecordDecl *ActingContext, QualType ObjectType, 1341 Expr::Classification ObjectClassification, 1342 Expr **Args, unsigned NumArgs, 1343 OverloadCandidateSet& CandidateSet, 1344 bool SuppressUserConversions = false); 1345 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1346 DeclAccessPair FoundDecl, 1347 CXXRecordDecl *ActingContext, 1348 TemplateArgumentListInfo *ExplicitTemplateArgs, 1349 QualType ObjectType, 1350 Expr::Classification ObjectClassification, 1351 Expr **Args, unsigned NumArgs, 1352 OverloadCandidateSet& CandidateSet, 1353 bool SuppressUserConversions = false); 1354 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1355 DeclAccessPair FoundDecl, 1356 TemplateArgumentListInfo *ExplicitTemplateArgs, 1357 Expr **Args, unsigned NumArgs, 1358 OverloadCandidateSet& CandidateSet, 1359 bool SuppressUserConversions = false); 1360 void AddConversionCandidate(CXXConversionDecl *Conversion, 1361 DeclAccessPair FoundDecl, 1362 CXXRecordDecl *ActingContext, 1363 Expr *From, QualType ToType, 1364 OverloadCandidateSet& CandidateSet); 1365 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1366 DeclAccessPair FoundDecl, 1367 CXXRecordDecl *ActingContext, 1368 Expr *From, QualType ToType, 1369 OverloadCandidateSet &CandidateSet); 1370 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1371 DeclAccessPair FoundDecl, 1372 CXXRecordDecl *ActingContext, 1373 const FunctionProtoType *Proto, 1374 Expr *Object, Expr **Args, unsigned NumArgs, 1375 OverloadCandidateSet& CandidateSet); 1376 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1377 SourceLocation OpLoc, 1378 Expr **Args, unsigned NumArgs, 1379 OverloadCandidateSet& CandidateSet, 1380 SourceRange OpRange = SourceRange()); 1381 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1382 Expr **Args, unsigned NumArgs, 1383 OverloadCandidateSet& CandidateSet, 1384 bool IsAssignmentOperator = false, 1385 unsigned NumContextualBoolArguments = 0); 1386 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1387 SourceLocation OpLoc, 1388 Expr **Args, unsigned NumArgs, 1389 OverloadCandidateSet& CandidateSet); 1390 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1391 bool Operator, 1392 Expr **Args, unsigned NumArgs, 1393 TemplateArgumentListInfo *ExplicitTemplateArgs, 1394 OverloadCandidateSet& CandidateSet, 1395 bool PartialOverloading = false, 1396 bool StdNamespaceIsAssociated = false); 1397 1398 // Emit as a 'note' the specific overload candidate 1399 void NoteOverloadCandidate(FunctionDecl *Fn); 1400 1401 // Emit as a series of 'note's all template and non-templates 1402 // identified by the expression Expr 1403 void NoteAllOverloadCandidates(Expr* E); 1404 1405 // [PossiblyAFunctionType] --> [Return] 1406 // NonFunctionType --> NonFunctionType 1407 // R (A) --> R(A) 1408 // R (*)(A) --> R (A) 1409 // R (&)(A) --> R (A) 1410 // R (S::*)(A) --> R (A) 1411 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1412 1413 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1414 bool Complain, 1415 DeclAccessPair &Found); 1416 1417 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1418 bool Complain = false, 1419 DeclAccessPair* Found = 0); 1420 1421 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1422 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1423 bool Complain = false, 1424 const SourceRange& OpRangeForComplaining = SourceRange(), 1425 QualType DestTypeForComplaining = QualType(), 1426 unsigned DiagIDForComplaining = 0); 1427 1428 1429 Expr *FixOverloadedFunctionReference(Expr *E, 1430 DeclAccessPair FoundDecl, 1431 FunctionDecl *Fn); 1432 ExprResult FixOverloadedFunctionReference(ExprResult, 1433 DeclAccessPair FoundDecl, 1434 FunctionDecl *Fn); 1435 1436 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1437 Expr **Args, unsigned NumArgs, 1438 OverloadCandidateSet &CandidateSet, 1439 bool PartialOverloading = false); 1440 1441 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1442 UnresolvedLookupExpr *ULE, 1443 SourceLocation LParenLoc, 1444 Expr **Args, unsigned NumArgs, 1445 SourceLocation RParenLoc, 1446 Expr *ExecConfig); 1447 1448 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1449 unsigned Opc, 1450 const UnresolvedSetImpl &Fns, 1451 Expr *input); 1452 1453 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1454 unsigned Opc, 1455 const UnresolvedSetImpl &Fns, 1456 Expr *LHS, Expr *RHS); 1457 1458 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1459 SourceLocation RLoc, 1460 Expr *Base,Expr *Idx); 1461 1462 ExprResult 1463 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1464 SourceLocation LParenLoc, Expr **Args, 1465 unsigned NumArgs, SourceLocation RParenLoc); 1466 ExprResult 1467 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1468 Expr **Args, unsigned NumArgs, 1469 SourceLocation RParenLoc); 1470 1471 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1472 SourceLocation OpLoc); 1473 1474 /// CheckCallReturnType - Checks that a call expression's return type is 1475 /// complete. Returns true on failure. The location passed in is the location 1476 /// that best represents the call. 1477 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1478 CallExpr *CE, FunctionDecl *FD); 1479 1480 /// Helpers for dealing with blocks and functions. 1481 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1482 bool CheckParameterNames); 1483 void CheckCXXDefaultArguments(FunctionDecl *FD); 1484 void CheckExtraCXXDefaultArguments(Declarator &D); 1485 Scope *getNonFieldDeclScope(Scope *S); 1486 1487 /// \name Name lookup 1488 /// 1489 /// These routines provide name lookup that is used during semantic 1490 /// analysis to resolve the various kinds of names (identifiers, 1491 /// overloaded operator names, constructor names, etc.) into zero or 1492 /// more declarations within a particular scope. The major entry 1493 /// points are LookupName, which performs unqualified name lookup, 1494 /// and LookupQualifiedName, which performs qualified name lookup. 1495 /// 1496 /// All name lookup is performed based on some specific criteria, 1497 /// which specify what names will be visible to name lookup and how 1498 /// far name lookup should work. These criteria are important both 1499 /// for capturing language semantics (certain lookups will ignore 1500 /// certain names, for example) and for performance, since name 1501 /// lookup is often a bottleneck in the compilation of C++. Name 1502 /// lookup criteria is specified via the LookupCriteria enumeration. 1503 /// 1504 /// The results of name lookup can vary based on the kind of name 1505 /// lookup performed, the current language, and the translation 1506 /// unit. In C, for example, name lookup will either return nothing 1507 /// (no entity found) or a single declaration. In C++, name lookup 1508 /// can additionally refer to a set of overloaded functions or 1509 /// result in an ambiguity. All of the possible results of name 1510 /// lookup are captured by the LookupResult class, which provides 1511 /// the ability to distinguish among them. 1512 //@{ 1513 1514 /// @brief Describes the kind of name lookup to perform. 1515 enum LookupNameKind { 1516 /// Ordinary name lookup, which finds ordinary names (functions, 1517 /// variables, typedefs, etc.) in C and most kinds of names 1518 /// (functions, variables, members, types, etc.) in C++. 1519 LookupOrdinaryName = 0, 1520 /// Tag name lookup, which finds the names of enums, classes, 1521 /// structs, and unions. 1522 LookupTagName, 1523 /// Label name lookup. 1524 LookupLabel, 1525 /// Member name lookup, which finds the names of 1526 /// class/struct/union members. 1527 LookupMemberName, 1528 /// Look up of an operator name (e.g., operator+) for use with 1529 /// operator overloading. This lookup is similar to ordinary name 1530 /// lookup, but will ignore any declarations that are class members. 1531 LookupOperatorName, 1532 /// Look up of a name that precedes the '::' scope resolution 1533 /// operator in C++. This lookup completely ignores operator, object, 1534 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1535 LookupNestedNameSpecifierName, 1536 /// Look up a namespace name within a C++ using directive or 1537 /// namespace alias definition, ignoring non-namespace names (C++ 1538 /// [basic.lookup.udir]p1). 1539 LookupNamespaceName, 1540 /// Look up all declarations in a scope with the given name, 1541 /// including resolved using declarations. This is appropriate 1542 /// for checking redeclarations for a using declaration. 1543 LookupUsingDeclName, 1544 /// Look up an ordinary name that is going to be redeclared as a 1545 /// name with linkage. This lookup ignores any declarations that 1546 /// are outside of the current scope unless they have linkage. See 1547 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1548 LookupRedeclarationWithLinkage, 1549 /// Look up the name of an Objective-C protocol. 1550 LookupObjCProtocolName, 1551 /// \brief Look up any declaration with any name. 1552 LookupAnyName 1553 }; 1554 1555 /// \brief Specifies whether (or how) name lookup is being performed for a 1556 /// redeclaration (vs. a reference). 1557 enum RedeclarationKind { 1558 /// \brief The lookup is a reference to this name that is not for the 1559 /// purpose of redeclaring the name. 1560 NotForRedeclaration = 0, 1561 /// \brief The lookup results will be used for redeclaration of a name, 1562 /// if an entity by that name already exists. 1563 ForRedeclaration 1564 }; 1565 1566private: 1567 bool CppLookupName(LookupResult &R, Scope *S); 1568 1569public: 1570 /// \brief Look up a name, looking for a single declaration. Return 1571 /// null if the results were absent, ambiguous, or overloaded. 1572 /// 1573 /// It is preferable to use the elaborated form and explicitly handle 1574 /// ambiguity and overloaded. 1575 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1576 SourceLocation Loc, 1577 LookupNameKind NameKind, 1578 RedeclarationKind Redecl 1579 = NotForRedeclaration); 1580 bool LookupName(LookupResult &R, Scope *S, 1581 bool AllowBuiltinCreation = false); 1582 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1583 bool InUnqualifiedLookup = false); 1584 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1585 bool AllowBuiltinCreation = false, 1586 bool EnteringContext = false); 1587 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1588 1589 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1590 QualType T1, QualType T2, 1591 UnresolvedSetImpl &Functions); 1592 1593 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1594 SourceLocation GnuLabelLoc = SourceLocation()); 1595 1596 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1597 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1598 1599 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1600 Expr **Args, unsigned NumArgs, 1601 ADLResult &Functions, 1602 bool StdNamespaceIsAssociated = false); 1603 1604 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1605 VisibleDeclConsumer &Consumer, 1606 bool IncludeGlobalScope = true); 1607 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1608 VisibleDeclConsumer &Consumer, 1609 bool IncludeGlobalScope = true); 1610 1611 /// \brief The context in which typo-correction occurs. 1612 /// 1613 /// The typo-correction context affects which keywords (if any) are 1614 /// considered when trying to correct for typos. 1615 enum CorrectTypoContext { 1616 /// \brief An unknown context, where any keyword might be valid. 1617 CTC_Unknown, 1618 /// \brief A context where no keywords are used (e.g. we expect an actual 1619 /// name). 1620 CTC_NoKeywords, 1621 /// \brief A context where we're correcting a type name. 1622 CTC_Type, 1623 /// \brief An expression context. 1624 CTC_Expression, 1625 /// \brief A type cast, or anything else that can be followed by a '<'. 1626 CTC_CXXCasts, 1627 /// \brief A member lookup context. 1628 CTC_MemberLookup, 1629 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1630 CTC_ObjCIvarLookup, 1631 /// \brief An Objective-C property lookup context (e.g., self.prop). 1632 CTC_ObjCPropertyLookup, 1633 /// \brief The receiver of an Objective-C message send within an 1634 /// Objective-C method where 'super' is a valid keyword. 1635 CTC_ObjCMessageReceiver 1636 }; 1637 1638 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1639 DeclContext *MemberContext = 0, 1640 bool EnteringContext = false, 1641 CorrectTypoContext CTC = CTC_Unknown, 1642 const ObjCObjectPointerType *OPT = 0); 1643 1644 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1645 AssociatedNamespaceSet &AssociatedNamespaces, 1646 AssociatedClassSet &AssociatedClasses); 1647 1648 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1649 //@} 1650 1651 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1652 SourceLocation IdLoc, 1653 bool TypoCorrection = false); 1654 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1655 Scope *S, bool ForRedeclaration, 1656 SourceLocation Loc); 1657 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1658 Scope *S); 1659 void AddKnownFunctionAttributes(FunctionDecl *FD); 1660 1661 // More parsing and symbol table subroutines. 1662 1663 // Decl attributes - this routine is the top level dispatcher. 1664 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1665 bool NonInheritable = true, bool Inheritable = true); 1666 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1667 bool NonInheritable = true, bool Inheritable = true); 1668 1669 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1670 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1671 bool CheckNoReturnAttr(const AttributeList &attr); 1672 1673 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1674 bool &IncompleteImpl, unsigned DiagID); 1675 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1676 ObjCMethodDecl *MethodDecl, 1677 bool IsProtocolMethodDecl); 1678 1679 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1680 ObjCInterfaceDecl *IDecl); 1681 1682 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1683 1684 /// CheckProtocolMethodDefs - This routine checks unimplemented 1685 /// methods declared in protocol, and those referenced by it. 1686 /// \param IDecl - Used for checking for methods which may have been 1687 /// inherited. 1688 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1689 ObjCProtocolDecl *PDecl, 1690 bool& IncompleteImpl, 1691 const SelectorSet &InsMap, 1692 const SelectorSet &ClsMap, 1693 ObjCContainerDecl *CDecl); 1694 1695 /// CheckImplementationIvars - This routine checks if the instance variables 1696 /// listed in the implelementation match those listed in the interface. 1697 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1698 ObjCIvarDecl **Fields, unsigned nIvars, 1699 SourceLocation Loc); 1700 1701 /// \brief Determine whether we can synthesize a provisional ivar for the 1702 /// given name. 1703 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1704 1705 /// \brief Determine whether we can synthesize a provisional ivar for the 1706 /// given property. 1707 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1708 1709 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1710 /// remains unimplemented in the class or category @implementation. 1711 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1712 ObjCContainerDecl* IDecl, 1713 bool IncompleteImpl = false); 1714 1715 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1716 /// which must be implemented by this implementation. 1717 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1718 ObjCContainerDecl *CDecl, 1719 const SelectorSet &InsMap); 1720 1721 /// DefaultSynthesizeProperties - This routine default synthesizes all 1722 /// properties which must be synthesized in class's @implementation. 1723 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1724 ObjCInterfaceDecl *IDecl); 1725 1726 /// CollectImmediateProperties - This routine collects all properties in 1727 /// the class and its conforming protocols; but not those it its super class. 1728 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1729 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1730 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1731 1732 1733 /// LookupPropertyDecl - Looks up a property in the current class and all 1734 /// its protocols. 1735 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1736 IdentifierInfo *II); 1737 1738 /// Called by ActOnProperty to handle @property declarations in 1739 //// class extensions. 1740 Decl *HandlePropertyInClassExtension(Scope *S, 1741 ObjCCategoryDecl *CDecl, 1742 SourceLocation AtLoc, 1743 FieldDeclarator &FD, 1744 Selector GetterSel, 1745 Selector SetterSel, 1746 const bool isAssign, 1747 const bool isReadWrite, 1748 const unsigned Attributes, 1749 bool *isOverridingProperty, 1750 TypeSourceInfo *T, 1751 tok::ObjCKeywordKind MethodImplKind); 1752 1753 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1754 /// handle creating the ObjcPropertyDecl for a category or @interface. 1755 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1756 ObjCContainerDecl *CDecl, 1757 SourceLocation AtLoc, 1758 FieldDeclarator &FD, 1759 Selector GetterSel, 1760 Selector SetterSel, 1761 const bool isAssign, 1762 const bool isReadWrite, 1763 const unsigned Attributes, 1764 TypeSourceInfo *T, 1765 tok::ObjCKeywordKind MethodImplKind, 1766 DeclContext *lexicalDC = 0); 1767 1768 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1769 /// warning) when atomic property has one but not the other user-declared 1770 /// setter or getter. 1771 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1772 ObjCContainerDecl* IDecl); 1773 1774 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1775 1776 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1777 /// true, or false, accordingly. 1778 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1779 const ObjCMethodDecl *PrevMethod, 1780 bool matchBasedOnSizeAndAlignment = false, 1781 bool matchBasedOnStrictEqulity = false); 1782 1783 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1784 /// or protocol against those declared in their implementations. 1785 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1786 const SelectorSet &ClsMap, 1787 SelectorSet &InsMapSeen, 1788 SelectorSet &ClsMapSeen, 1789 ObjCImplDecl* IMPDecl, 1790 ObjCContainerDecl* IDecl, 1791 bool &IncompleteImpl, 1792 bool ImmediateClass); 1793 1794private: 1795 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1796 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1797 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1798 1799 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1800 /// optionally warns if there are multiple signatures. 1801 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1802 bool receiverIdOrClass, 1803 bool warn, bool instance); 1804 1805public: 1806 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1807 /// unit are added to a global pool. This allows us to efficiently associate 1808 /// a selector with a method declaraation for purposes of typechecking 1809 /// messages sent to "id" (where the class of the object is unknown). 1810 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1811 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1812 } 1813 1814 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1815 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1816 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1817 } 1818 1819 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1820 /// there are multiple signatures. 1821 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1822 bool receiverIdOrClass=false, 1823 bool warn=true) { 1824 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1825 warn, /*instance*/true); 1826 } 1827 1828 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1829 /// there are multiple signatures. 1830 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1831 bool receiverIdOrClass=false, 1832 bool warn=true) { 1833 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1834 warn, /*instance*/false); 1835 } 1836 1837 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1838 /// implementation. 1839 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1840 1841 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1842 /// initialization. 1843 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1844 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1845 1846 //===--------------------------------------------------------------------===// 1847 // Statement Parsing Callbacks: SemaStmt.cpp. 1848public: 1849 class FullExprArg { 1850 public: 1851 FullExprArg(Sema &actions) : E(0) { } 1852 1853 // FIXME: The const_cast here is ugly. RValue references would make this 1854 // much nicer (or we could duplicate a bunch of the move semantics 1855 // emulation code from Ownership.h). 1856 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1857 1858 ExprResult release() { 1859 return move(E); 1860 } 1861 1862 Expr *get() const { return E; } 1863 1864 Expr *operator->() { 1865 return E; 1866 } 1867 1868 private: 1869 // FIXME: No need to make the entire Sema class a friend when it's just 1870 // Sema::MakeFullExpr that needs access to the constructor below. 1871 friend class Sema; 1872 1873 explicit FullExprArg(Expr *expr) : E(expr) {} 1874 1875 Expr *E; 1876 }; 1877 1878 FullExprArg MakeFullExpr(Expr *Arg) { 1879 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1880 } 1881 1882 StmtResult ActOnExprStmt(FullExprArg Expr); 1883 1884 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1885 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1886 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1887 MultiStmtArg Elts, 1888 bool isStmtExpr); 1889 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1890 SourceLocation StartLoc, 1891 SourceLocation EndLoc); 1892 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1893 StmtResult ActOnForEachLValueExpr(Expr *E); 1894 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1895 SourceLocation DotDotDotLoc, Expr *RHSVal, 1896 SourceLocation ColonLoc); 1897 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1898 1899 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1900 SourceLocation ColonLoc, 1901 Stmt *SubStmt, Scope *CurScope); 1902 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1903 SourceLocation ColonLoc, Stmt *SubStmt); 1904 1905 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1906 FullExprArg CondVal, Decl *CondVar, 1907 Stmt *ThenVal, 1908 SourceLocation ElseLoc, Stmt *ElseVal); 1909 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1910 Expr *Cond, 1911 Decl *CondVar); 1912 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1913 Stmt *Switch, Stmt *Body); 1914 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1915 FullExprArg Cond, 1916 Decl *CondVar, Stmt *Body); 1917 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1918 SourceLocation WhileLoc, 1919 SourceLocation CondLParen, Expr *Cond, 1920 SourceLocation CondRParen); 1921 1922 StmtResult ActOnForStmt(SourceLocation ForLoc, 1923 SourceLocation LParenLoc, 1924 Stmt *First, FullExprArg Second, 1925 Decl *SecondVar, 1926 FullExprArg Third, 1927 SourceLocation RParenLoc, 1928 Stmt *Body); 1929 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1930 SourceLocation LParenLoc, 1931 Stmt *First, Expr *Second, 1932 SourceLocation RParenLoc, Stmt *Body); 1933 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 1934 SourceLocation LParenLoc, Stmt *LoopVar, 1935 SourceLocation ColonLoc, Expr *Collection, 1936 SourceLocation RParenLoc); 1937 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 1938 SourceLocation ColonLoc, 1939 Stmt *RangeDecl, Stmt *BeginEndDecl, 1940 Expr *Cond, Expr *Inc, 1941 Stmt *LoopVarDecl, 1942 SourceLocation RParenLoc); 1943 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 1944 1945 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1946 SourceLocation LabelLoc, 1947 LabelDecl *TheDecl); 1948 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1949 SourceLocation StarLoc, 1950 Expr *DestExp); 1951 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1952 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1953 1954 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1955 bool AllowFunctionParameters); 1956 1957 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1958 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1959 1960 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1961 bool IsSimple, bool IsVolatile, 1962 unsigned NumOutputs, unsigned NumInputs, 1963 IdentifierInfo **Names, 1964 MultiExprArg Constraints, 1965 MultiExprArg Exprs, 1966 Expr *AsmString, 1967 MultiExprArg Clobbers, 1968 SourceLocation RParenLoc, 1969 bool MSAsm = false); 1970 1971 1972 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1973 SourceLocation StartLoc, 1974 SourceLocation IdLoc, IdentifierInfo *Id, 1975 bool Invalid = false); 1976 1977 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1978 1979 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1980 Decl *Parm, Stmt *Body); 1981 1982 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1983 1984 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1985 MultiStmtArg Catch, Stmt *Finally); 1986 1987 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1988 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1989 Scope *CurScope); 1990 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1991 Expr *SynchExpr, 1992 Stmt *SynchBody); 1993 1994 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 1995 SourceLocation StartLoc, 1996 SourceLocation IdLoc, 1997 IdentifierInfo *Id); 1998 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1999 2000 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2001 Decl *ExDecl, Stmt *HandlerBlock); 2002 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2003 MultiStmtArg Handlers); 2004 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2005 2006 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2007 2008 /// \brief If it's a file scoped decl that must warn if not used, keep track 2009 /// of it. 2010 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2011 2012 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2013 /// whose result is unused, warn. 2014 void DiagnoseUnusedExprResult(const Stmt *S); 2015 void DiagnoseUnusedDecl(const NamedDecl *ND); 2016 2017 ParsingDeclState PushParsingDeclaration() { 2018 return DelayedDiagnostics.pushParsingDecl(); 2019 } 2020 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2021 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2022 } 2023 2024 typedef ProcessingContextState ParsingClassState; 2025 ParsingClassState PushParsingClass() { 2026 return DelayedDiagnostics.pushContext(); 2027 } 2028 void PopParsingClass(ParsingClassState state) { 2029 DelayedDiagnostics.popContext(state); 2030 } 2031 2032 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 2033 SourceLocation Loc, 2034 const ObjCInterfaceDecl *UnknownObjCClass=0); 2035 2036 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2037 2038 //===--------------------------------------------------------------------===// 2039 // Expression Parsing Callbacks: SemaExpr.cpp. 2040 2041 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2042 const ObjCInterfaceDecl *UnknownObjCClass=0); 2043 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2044 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2045 ObjCMethodDecl *Getter, 2046 SourceLocation Loc); 2047 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2048 Expr **Args, unsigned NumArgs); 2049 2050 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2051 2052 void PopExpressionEvaluationContext(); 2053 2054 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2055 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2056 void MarkDeclarationsReferencedInExpr(Expr *E); 2057 2058 /// \brief Conditionally issue a diagnostic based on the current 2059 /// evaluation context. 2060 /// 2061 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2062 /// the function body is parsed, and then do a basic reachability analysis to 2063 /// determine if the statement is reachable. If it is unreachable, the 2064 /// diagnostic will not be emitted. 2065 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2066 const PartialDiagnostic &PD); 2067 2068 // Primary Expressions. 2069 SourceRange getExprRange(Expr *E) const; 2070 2071 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2072 IdentifierInfo *II, 2073 SourceLocation NameLoc); 2074 2075 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2076 bool HasTrailingLParen, bool IsAddressOfOperand); 2077 2078 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2079 CorrectTypoContext CTC = CTC_Unknown); 2080 2081 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2082 bool AllowBuiltinCreation=false); 2083 2084 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2085 const DeclarationNameInfo &NameInfo, 2086 bool isAddressOfOperand, 2087 const TemplateArgumentListInfo *TemplateArgs); 2088 2089 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2090 ExprValueKind VK, 2091 SourceLocation Loc, 2092 const CXXScopeSpec *SS = 0); 2093 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2094 ExprValueKind VK, 2095 const DeclarationNameInfo &NameInfo, 2096 const CXXScopeSpec *SS = 0); 2097 ExprResult 2098 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2099 SourceLocation nameLoc, 2100 IndirectFieldDecl *indirectField, 2101 Expr *baseObjectExpr = 0, 2102 SourceLocation opLoc = SourceLocation()); 2103 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2104 LookupResult &R, 2105 const TemplateArgumentListInfo *TemplateArgs); 2106 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2107 LookupResult &R, 2108 const TemplateArgumentListInfo *TemplateArgs, 2109 bool IsDefiniteInstance); 2110 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2111 const LookupResult &R, 2112 bool HasTrailingLParen); 2113 2114 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2115 const DeclarationNameInfo &NameInfo); 2116 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2117 const DeclarationNameInfo &NameInfo, 2118 const TemplateArgumentListInfo *TemplateArgs); 2119 2120 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2121 LookupResult &R, 2122 bool ADL); 2123 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2124 const DeclarationNameInfo &NameInfo, 2125 NamedDecl *D); 2126 2127 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2128 ExprResult ActOnNumericConstant(const Token &); 2129 ExprResult ActOnCharacterConstant(const Token &); 2130 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2131 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2132 SourceLocation R, 2133 MultiExprArg Val, 2134 ParsedType TypeOfCast = ParsedType()); 2135 2136 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2137 /// fragments (e.g. "foo" "bar" L"baz"). 2138 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2139 2140 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2141 SourceLocation DefaultLoc, 2142 SourceLocation RParenLoc, 2143 Expr *ControllingExpr, 2144 MultiTypeArg Types, 2145 MultiExprArg Exprs); 2146 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2147 SourceLocation DefaultLoc, 2148 SourceLocation RParenLoc, 2149 Expr *ControllingExpr, 2150 TypeSourceInfo **Types, 2151 Expr **Exprs, 2152 unsigned NumAssocs); 2153 2154 // Binary/Unary Operators. 'Tok' is the token for the operator. 2155 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2156 Expr *InputArg); 2157 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2158 UnaryOperatorKind Opc, Expr *input); 2159 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2160 tok::TokenKind Op, Expr *Input); 2161 2162 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2163 SourceLocation OpLoc, 2164 UnaryExprOrTypeTrait ExprKind, 2165 SourceRange R); 2166 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2167 UnaryExprOrTypeTrait ExprKind, 2168 SourceRange R); 2169 ExprResult 2170 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2171 UnaryExprOrTypeTrait ExprKind, 2172 bool isType, void *TyOrEx, 2173 const SourceRange &ArgRange); 2174 2175 ExprResult CheckPlaceholderExpr(Expr *E); 2176 bool CheckVecStepExpr(Expr *E, SourceLocation OpLoc, SourceRange R); 2177 2178 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2179 SourceRange R, 2180 UnaryExprOrTypeTrait ExprKind); 2181 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2182 SourceLocation OpLoc, 2183 IdentifierInfo &Name, 2184 SourceLocation NameLoc, 2185 SourceLocation RParenLoc); 2186 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2187 tok::TokenKind Kind, Expr *Input); 2188 2189 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2190 Expr *Idx, SourceLocation RLoc); 2191 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2192 Expr *Idx, SourceLocation RLoc); 2193 2194 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2195 SourceLocation OpLoc, bool IsArrow, 2196 CXXScopeSpec &SS, 2197 NamedDecl *FirstQualifierInScope, 2198 const DeclarationNameInfo &NameInfo, 2199 const TemplateArgumentListInfo *TemplateArgs); 2200 2201 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2202 SourceLocation OpLoc, bool IsArrow, 2203 const CXXScopeSpec &SS, 2204 NamedDecl *FirstQualifierInScope, 2205 LookupResult &R, 2206 const TemplateArgumentListInfo *TemplateArgs, 2207 bool SuppressQualifierCheck = false); 2208 2209 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2210 bool &IsArrow, SourceLocation OpLoc, 2211 CXXScopeSpec &SS, 2212 Decl *ObjCImpDecl, 2213 bool HasTemplateArgs); 2214 2215 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2216 const CXXScopeSpec &SS, 2217 const LookupResult &R); 2218 2219 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2220 bool IsArrow, SourceLocation OpLoc, 2221 const CXXScopeSpec &SS, 2222 NamedDecl *FirstQualifierInScope, 2223 const DeclarationNameInfo &NameInfo, 2224 const TemplateArgumentListInfo *TemplateArgs); 2225 2226 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2227 SourceLocation OpLoc, 2228 tok::TokenKind OpKind, 2229 CXXScopeSpec &SS, 2230 UnqualifiedId &Member, 2231 Decl *ObjCImpDecl, 2232 bool HasTrailingLParen); 2233 2234 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2235 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2236 FunctionDecl *FDecl, 2237 const FunctionProtoType *Proto, 2238 Expr **Args, unsigned NumArgs, 2239 SourceLocation RParenLoc); 2240 2241 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2242 /// This provides the location of the left/right parens and a list of comma 2243 /// locations. 2244 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2245 MultiExprArg Args, SourceLocation RParenLoc, 2246 Expr *ExecConfig = 0); 2247 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2248 SourceLocation LParenLoc, 2249 Expr **Args, unsigned NumArgs, 2250 SourceLocation RParenLoc, 2251 Expr *ExecConfig = 0); 2252 2253 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2254 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2255 2256 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2257 ParsedType Ty, SourceLocation RParenLoc, 2258 Expr *Op); 2259 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2260 TypeSourceInfo *Ty, 2261 SourceLocation RParenLoc, 2262 Expr *Op); 2263 2264 bool TypeIsVectorType(ParsedType Ty) { 2265 return GetTypeFromParser(Ty)->isVectorType(); 2266 } 2267 2268 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2269 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2270 SourceLocation RParenLoc, Expr *E, 2271 TypeSourceInfo *TInfo); 2272 2273 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2274 ParsedType Ty, 2275 SourceLocation RParenLoc, 2276 Expr *Op); 2277 2278 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2279 TypeSourceInfo *TInfo, 2280 SourceLocation RParenLoc, 2281 Expr *InitExpr); 2282 2283 ExprResult ActOnInitList(SourceLocation LParenLoc, 2284 MultiExprArg InitList, 2285 SourceLocation RParenLoc); 2286 2287 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2288 SourceLocation Loc, 2289 bool GNUSyntax, 2290 ExprResult Init); 2291 2292 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2293 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2294 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2295 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2296 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2297 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2298 2299 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2300 /// in the case of a the GNU conditional expr extension. 2301 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2302 SourceLocation ColonLoc, 2303 Expr *Cond, Expr *LHS, Expr *RHS); 2304 2305 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2306 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2307 LabelDecl *LD); 2308 2309 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2310 SourceLocation RPLoc); // "({..})" 2311 2312 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2313 struct OffsetOfComponent { 2314 SourceLocation LocStart, LocEnd; 2315 bool isBrackets; // true if [expr], false if .ident 2316 union { 2317 IdentifierInfo *IdentInfo; 2318 ExprTy *E; 2319 } U; 2320 }; 2321 2322 /// __builtin_offsetof(type, a.b[123][456].c) 2323 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2324 TypeSourceInfo *TInfo, 2325 OffsetOfComponent *CompPtr, 2326 unsigned NumComponents, 2327 SourceLocation RParenLoc); 2328 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2329 SourceLocation BuiltinLoc, 2330 SourceLocation TypeLoc, 2331 ParsedType Arg1, 2332 OffsetOfComponent *CompPtr, 2333 unsigned NumComponents, 2334 SourceLocation RParenLoc); 2335 2336 // __builtin_choose_expr(constExpr, expr1, expr2) 2337 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2338 Expr *cond, Expr *expr1, 2339 Expr *expr2, SourceLocation RPLoc); 2340 2341 // __builtin_va_arg(expr, type) 2342 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2343 Expr *expr, ParsedType type, 2344 SourceLocation RPLoc); 2345 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2346 Expr *expr, TypeSourceInfo *TInfo, 2347 SourceLocation RPLoc); 2348 2349 // __null 2350 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2351 2352 bool CheckCaseExpression(Expr *expr); 2353 2354 //===------------------------- "Block" Extension ------------------------===// 2355 2356 /// ActOnBlockStart - This callback is invoked when a block literal is 2357 /// started. 2358 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2359 2360 /// ActOnBlockArguments - This callback allows processing of block arguments. 2361 /// If there are no arguments, this is still invoked. 2362 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2363 2364 /// ActOnBlockError - If there is an error parsing a block, this callback 2365 /// is invoked to pop the information about the block from the action impl. 2366 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2367 2368 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2369 /// literal was successfully completed. ^(int x){...} 2370 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2371 Stmt *Body, Scope *CurScope); 2372 2373 //===---------------------------- C++ Features --------------------------===// 2374 2375 // Act on C++ namespaces 2376 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2377 SourceLocation NamespaceLoc, 2378 SourceLocation IdentLoc, 2379 IdentifierInfo *Ident, 2380 SourceLocation LBrace, 2381 AttributeList *AttrList); 2382 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2383 2384 NamespaceDecl *getStdNamespace() const; 2385 NamespaceDecl *getOrCreateStdNamespace(); 2386 2387 CXXRecordDecl *getStdBadAlloc() const; 2388 2389 Decl *ActOnUsingDirective(Scope *CurScope, 2390 SourceLocation UsingLoc, 2391 SourceLocation NamespcLoc, 2392 CXXScopeSpec &SS, 2393 SourceLocation IdentLoc, 2394 IdentifierInfo *NamespcName, 2395 AttributeList *AttrList); 2396 2397 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2398 2399 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2400 SourceLocation NamespaceLoc, 2401 SourceLocation AliasLoc, 2402 IdentifierInfo *Alias, 2403 CXXScopeSpec &SS, 2404 SourceLocation IdentLoc, 2405 IdentifierInfo *Ident); 2406 2407 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2408 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2409 const LookupResult &PreviousDecls); 2410 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2411 NamedDecl *Target); 2412 2413 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2414 bool isTypeName, 2415 const CXXScopeSpec &SS, 2416 SourceLocation NameLoc, 2417 const LookupResult &Previous); 2418 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2419 const CXXScopeSpec &SS, 2420 SourceLocation NameLoc); 2421 2422 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2423 SourceLocation UsingLoc, 2424 CXXScopeSpec &SS, 2425 const DeclarationNameInfo &NameInfo, 2426 AttributeList *AttrList, 2427 bool IsInstantiation, 2428 bool IsTypeName, 2429 SourceLocation TypenameLoc); 2430 2431 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2432 2433 Decl *ActOnUsingDeclaration(Scope *CurScope, 2434 AccessSpecifier AS, 2435 bool HasUsingKeyword, 2436 SourceLocation UsingLoc, 2437 CXXScopeSpec &SS, 2438 UnqualifiedId &Name, 2439 AttributeList *AttrList, 2440 bool IsTypeName, 2441 SourceLocation TypenameLoc); 2442 Decl *ActOnAliasDeclaration(Scope *CurScope, 2443 AccessSpecifier AS, 2444 SourceLocation UsingLoc, 2445 UnqualifiedId &Name, 2446 TypeResult Type); 2447 2448 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2449 /// ActOnDeclarator, when a C++ direct initializer is present. 2450 /// e.g: "int x(1);" 2451 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2452 SourceLocation LParenLoc, 2453 MultiExprArg Exprs, 2454 SourceLocation RParenLoc, 2455 bool TypeMayContainAuto); 2456 2457 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2458 /// and sets it as the initializer for the the passed in VarDecl. 2459 bool InitializeVarWithConstructor(VarDecl *VD, 2460 CXXConstructorDecl *Constructor, 2461 MultiExprArg Exprs); 2462 2463 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2464 /// including handling of its default argument expressions. 2465 /// 2466 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2467 ExprResult 2468 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2469 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2470 bool RequiresZeroInit, unsigned ConstructKind, 2471 SourceRange ParenRange); 2472 2473 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2474 // the constructor can be elidable? 2475 ExprResult 2476 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2477 CXXConstructorDecl *Constructor, bool Elidable, 2478 MultiExprArg Exprs, bool RequiresZeroInit, 2479 unsigned ConstructKind, 2480 SourceRange ParenRange); 2481 2482 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2483 /// the default expr if needed. 2484 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2485 FunctionDecl *FD, 2486 ParmVarDecl *Param); 2487 2488 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2489 /// constructed variable. 2490 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2491 2492 /// \brief Declare the implicit default constructor for the given class. 2493 /// 2494 /// \param ClassDecl The class declaration into which the implicit 2495 /// default constructor will be added. 2496 /// 2497 /// \returns The implicitly-declared default constructor. 2498 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2499 CXXRecordDecl *ClassDecl); 2500 2501 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2502 /// defining this constructor as the default constructor. 2503 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2504 CXXConstructorDecl *Constructor); 2505 2506 /// \brief Declare the implicit destructor for the given class. 2507 /// 2508 /// \param ClassDecl The class declaration into which the implicit 2509 /// destructor will be added. 2510 /// 2511 /// \returns The implicitly-declared destructor. 2512 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2513 2514 /// DefineImplicitDestructor - Checks for feasibility of 2515 /// defining this destructor as the default destructor. 2516 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2517 CXXDestructorDecl *Destructor); 2518 2519 /// \brief Declare all inherited constructors for the given class. 2520 /// 2521 /// \param ClassDecl The class declaration into which the inherited 2522 /// constructors will be added. 2523 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2524 2525 /// \brief Declare the implicit copy constructor for the given class. 2526 /// 2527 /// \param S The scope of the class, which may be NULL if this is a 2528 /// template instantiation. 2529 /// 2530 /// \param ClassDecl The class declaration into which the implicit 2531 /// copy constructor will be added. 2532 /// 2533 /// \returns The implicitly-declared copy constructor. 2534 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2535 2536 /// DefineImplicitCopyConstructor - Checks for feasibility of 2537 /// defining this constructor as the copy constructor. 2538 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2539 CXXConstructorDecl *Constructor, 2540 unsigned TypeQuals); 2541 2542 /// \brief Declare the implicit copy assignment operator for the given class. 2543 /// 2544 /// \param S The scope of the class, which may be NULL if this is a 2545 /// template instantiation. 2546 /// 2547 /// \param ClassDecl The class declaration into which the implicit 2548 /// copy-assignment operator will be added. 2549 /// 2550 /// \returns The implicitly-declared copy assignment operator. 2551 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2552 2553 /// \brief Defined an implicitly-declared copy assignment operator. 2554 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2555 CXXMethodDecl *MethodDecl); 2556 2557 /// \brief Force the declaration of any implicitly-declared members of this 2558 /// class. 2559 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2560 2561 /// MaybeBindToTemporary - If the passed in expression has a record type with 2562 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2563 /// it simply returns the passed in expression. 2564 ExprResult MaybeBindToTemporary(Expr *E); 2565 2566 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2567 MultiExprArg ArgsPtr, 2568 SourceLocation Loc, 2569 ASTOwningVector<Expr*> &ConvertedArgs); 2570 2571 ParsedType getDestructorName(SourceLocation TildeLoc, 2572 IdentifierInfo &II, SourceLocation NameLoc, 2573 Scope *S, CXXScopeSpec &SS, 2574 ParsedType ObjectType, 2575 bool EnteringContext); 2576 2577 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2578 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2579 tok::TokenKind Kind, 2580 SourceLocation LAngleBracketLoc, 2581 ParsedType Ty, 2582 SourceLocation RAngleBracketLoc, 2583 SourceLocation LParenLoc, 2584 Expr *E, 2585 SourceLocation RParenLoc); 2586 2587 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2588 tok::TokenKind Kind, 2589 TypeSourceInfo *Ty, 2590 Expr *E, 2591 SourceRange AngleBrackets, 2592 SourceRange Parens); 2593 2594 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2595 SourceLocation TypeidLoc, 2596 TypeSourceInfo *Operand, 2597 SourceLocation RParenLoc); 2598 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2599 SourceLocation TypeidLoc, 2600 Expr *Operand, 2601 SourceLocation RParenLoc); 2602 2603 /// ActOnCXXTypeid - Parse typeid( something ). 2604 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2605 SourceLocation LParenLoc, bool isType, 2606 void *TyOrExpr, 2607 SourceLocation RParenLoc); 2608 2609 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2610 SourceLocation TypeidLoc, 2611 TypeSourceInfo *Operand, 2612 SourceLocation RParenLoc); 2613 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2614 SourceLocation TypeidLoc, 2615 Expr *Operand, 2616 SourceLocation RParenLoc); 2617 2618 /// ActOnCXXUuidof - Parse __uuidof( something ). 2619 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2620 SourceLocation LParenLoc, bool isType, 2621 void *TyOrExpr, 2622 SourceLocation RParenLoc); 2623 2624 2625 //// ActOnCXXThis - Parse 'this' pointer. 2626 ExprResult ActOnCXXThis(SourceLocation loc); 2627 2628 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2629 /// pointer to an instance method whose 'this' pointer is 2630 /// capturable, or null if this is not possible. 2631 CXXMethodDecl *tryCaptureCXXThis(); 2632 2633 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2634 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2635 2636 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2637 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2638 2639 //// ActOnCXXThrow - Parse throw expressions. 2640 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2641 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2642 2643 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2644 /// Can be interpreted either as function-style casting ("int(x)") 2645 /// or class type construction ("ClassType(x,y,z)") 2646 /// or creation of a value-initialized type ("int()"). 2647 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2648 SourceLocation LParenLoc, 2649 MultiExprArg Exprs, 2650 SourceLocation RParenLoc); 2651 2652 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2653 SourceLocation LParenLoc, 2654 MultiExprArg Exprs, 2655 SourceLocation RParenLoc); 2656 2657 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2658 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2659 SourceLocation PlacementLParen, 2660 MultiExprArg PlacementArgs, 2661 SourceLocation PlacementRParen, 2662 SourceRange TypeIdParens, Declarator &D, 2663 SourceLocation ConstructorLParen, 2664 MultiExprArg ConstructorArgs, 2665 SourceLocation ConstructorRParen); 2666 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2667 SourceLocation PlacementLParen, 2668 MultiExprArg PlacementArgs, 2669 SourceLocation PlacementRParen, 2670 SourceRange TypeIdParens, 2671 QualType AllocType, 2672 TypeSourceInfo *AllocTypeInfo, 2673 Expr *ArraySize, 2674 SourceLocation ConstructorLParen, 2675 MultiExprArg ConstructorArgs, 2676 SourceLocation ConstructorRParen, 2677 bool TypeMayContainAuto = true); 2678 2679 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2680 SourceRange R); 2681 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2682 bool UseGlobal, QualType AllocType, bool IsArray, 2683 Expr **PlaceArgs, unsigned NumPlaceArgs, 2684 FunctionDecl *&OperatorNew, 2685 FunctionDecl *&OperatorDelete); 2686 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2687 DeclarationName Name, Expr** Args, 2688 unsigned NumArgs, DeclContext *Ctx, 2689 bool AllowMissing, FunctionDecl *&Operator); 2690 void DeclareGlobalNewDelete(); 2691 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2692 QualType Argument, 2693 bool addMallocAttr = false); 2694 2695 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2696 DeclarationName Name, FunctionDecl* &Operator); 2697 2698 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2699 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2700 bool UseGlobal, bool ArrayForm, 2701 Expr *Operand); 2702 2703 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2704 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2705 SourceLocation StmtLoc, 2706 bool ConvertToBoolean); 2707 2708 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2709 Expr *Operand, SourceLocation RParen); 2710 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2711 SourceLocation RParen); 2712 2713 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2714 /// pseudo-functions. 2715 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2716 SourceLocation KWLoc, 2717 ParsedType Ty, 2718 SourceLocation RParen); 2719 2720 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2721 SourceLocation KWLoc, 2722 TypeSourceInfo *T, 2723 SourceLocation RParen); 2724 2725 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2726 /// pseudo-functions. 2727 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2728 SourceLocation KWLoc, 2729 ParsedType LhsTy, 2730 ParsedType RhsTy, 2731 SourceLocation RParen); 2732 2733 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2734 SourceLocation KWLoc, 2735 TypeSourceInfo *LhsT, 2736 TypeSourceInfo *RhsT, 2737 SourceLocation RParen); 2738 2739 /// ActOnExpressionTrait - Parsed one of the unary type trait support 2740 /// pseudo-functions. 2741 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 2742 SourceLocation KWLoc, 2743 Expr *Queried, 2744 SourceLocation RParen); 2745 2746 ExprResult BuildExpressionTrait(ExpressionTrait OET, 2747 SourceLocation KWLoc, 2748 Expr *Queried, 2749 SourceLocation RParen); 2750 2751 ExprResult ActOnStartCXXMemberReference(Scope *S, 2752 Expr *Base, 2753 SourceLocation OpLoc, 2754 tok::TokenKind OpKind, 2755 ParsedType &ObjectType, 2756 bool &MayBePseudoDestructor); 2757 2758 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2759 2760 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2761 SourceLocation OpLoc, 2762 tok::TokenKind OpKind, 2763 const CXXScopeSpec &SS, 2764 TypeSourceInfo *ScopeType, 2765 SourceLocation CCLoc, 2766 SourceLocation TildeLoc, 2767 PseudoDestructorTypeStorage DestroyedType, 2768 bool HasTrailingLParen); 2769 2770 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2771 SourceLocation OpLoc, 2772 tok::TokenKind OpKind, 2773 CXXScopeSpec &SS, 2774 UnqualifiedId &FirstTypeName, 2775 SourceLocation CCLoc, 2776 SourceLocation TildeLoc, 2777 UnqualifiedId &SecondTypeName, 2778 bool HasTrailingLParen); 2779 2780 /// MaybeCreateExprWithCleanups - If the current full-expression 2781 /// requires any cleanups, surround it with a ExprWithCleanups node. 2782 /// Otherwise, just returns the passed-in expression. 2783 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2784 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2785 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2786 2787 ExprResult ActOnFinishFullExpr(Expr *Expr); 2788 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2789 2790 // Marks SS invalid if it represents an incomplete type. 2791 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2792 2793 DeclContext *computeDeclContext(QualType T); 2794 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2795 bool EnteringContext = false); 2796 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2797 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2798 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2799 2800 /// \brief The parser has parsed a global nested-name-specifier '::'. 2801 /// 2802 /// \param S The scope in which this nested-name-specifier occurs. 2803 /// 2804 /// \param CCLoc The location of the '::'. 2805 /// 2806 /// \param SS The nested-name-specifier, which will be updated in-place 2807 /// to reflect the parsed nested-name-specifier. 2808 /// 2809 /// \returns true if an error occurred, false otherwise. 2810 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2811 CXXScopeSpec &SS); 2812 2813 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2814 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2815 2816 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2817 SourceLocation IdLoc, 2818 IdentifierInfo &II, 2819 ParsedType ObjectType); 2820 2821 bool BuildCXXNestedNameSpecifier(Scope *S, 2822 IdentifierInfo &Identifier, 2823 SourceLocation IdentifierLoc, 2824 SourceLocation CCLoc, 2825 QualType ObjectType, 2826 bool EnteringContext, 2827 CXXScopeSpec &SS, 2828 NamedDecl *ScopeLookupResult, 2829 bool ErrorRecoveryLookup); 2830 2831 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2832 /// 2833 /// \param S The scope in which this nested-name-specifier occurs. 2834 /// 2835 /// \param Identifier The identifier preceding the '::'. 2836 /// 2837 /// \param IdentifierLoc The location of the identifier. 2838 /// 2839 /// \param CCLoc The location of the '::'. 2840 /// 2841 /// \param ObjectType The type of the object, if we're parsing 2842 /// nested-name-specifier in a member access expression. 2843 /// 2844 /// \param EnteringContext Whether we're entering the context nominated by 2845 /// this nested-name-specifier. 2846 /// 2847 /// \param SS The nested-name-specifier, which is both an input 2848 /// parameter (the nested-name-specifier before this type) and an 2849 /// output parameter (containing the full nested-name-specifier, 2850 /// including this new type). 2851 /// 2852 /// \returns true if an error occurred, false otherwise. 2853 bool ActOnCXXNestedNameSpecifier(Scope *S, 2854 IdentifierInfo &Identifier, 2855 SourceLocation IdentifierLoc, 2856 SourceLocation CCLoc, 2857 ParsedType ObjectType, 2858 bool EnteringContext, 2859 CXXScopeSpec &SS); 2860 2861 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2862 IdentifierInfo &Identifier, 2863 SourceLocation IdentifierLoc, 2864 SourceLocation ColonLoc, 2865 ParsedType ObjectType, 2866 bool EnteringContext); 2867 2868 /// \brief The parser has parsed a nested-name-specifier 2869 /// 'template[opt] template-name < template-args >::'. 2870 /// 2871 /// \param S The scope in which this nested-name-specifier occurs. 2872 /// 2873 /// \param TemplateLoc The location of the 'template' keyword, if any. 2874 /// 2875 /// \param SS The nested-name-specifier, which is both an input 2876 /// parameter (the nested-name-specifier before this type) and an 2877 /// output parameter (containing the full nested-name-specifier, 2878 /// including this new type). 2879 /// 2880 /// \param TemplateLoc the location of the 'template' keyword, if any. 2881 /// \param TemplateName The template name. 2882 /// \param TemplateNameLoc The location of the template name. 2883 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2884 /// \param TemplateArgs The template arguments. 2885 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2886 /// \param CCLoc The location of the '::'. 2887 2888 /// \param EnteringContext Whether we're entering the context of the 2889 /// nested-name-specifier. 2890 /// 2891 /// 2892 /// \returns true if an error occurred, false otherwise. 2893 bool ActOnCXXNestedNameSpecifier(Scope *S, 2894 SourceLocation TemplateLoc, 2895 CXXScopeSpec &SS, 2896 TemplateTy Template, 2897 SourceLocation TemplateNameLoc, 2898 SourceLocation LAngleLoc, 2899 ASTTemplateArgsPtr TemplateArgs, 2900 SourceLocation RAngleLoc, 2901 SourceLocation CCLoc, 2902 bool EnteringContext); 2903 2904 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2905 /// that the parser can use later to reconstruct the given 2906 /// nested-name-specifier. 2907 /// 2908 /// \param SS A nested-name-specifier. 2909 /// 2910 /// \returns A pointer containing all of the information in the 2911 /// nested-name-specifier \p SS. 2912 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2913 2914 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2915 /// the nested-name-specifier structure. 2916 /// 2917 /// \param Annotation The annotation pointer, produced by 2918 /// \c SaveNestedNameSpecifierAnnotation(). 2919 /// 2920 /// \param AnnotationRange The source range corresponding to the annotation. 2921 /// 2922 /// \param SS The nested-name-specifier that will be updated with the contents 2923 /// of the annotation pointer. 2924 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2925 SourceRange AnnotationRange, 2926 CXXScopeSpec &SS); 2927 2928 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2929 2930 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2931 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2932 /// After this method is called, according to [C++ 3.4.3p3], names should be 2933 /// looked up in the declarator-id's scope, until the declarator is parsed and 2934 /// ActOnCXXExitDeclaratorScope is called. 2935 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2936 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2937 2938 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2939 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2940 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2941 /// Used to indicate that names should revert to being looked up in the 2942 /// defining scope. 2943 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2944 2945 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2946 /// initializer for the declaration 'Dcl'. 2947 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2948 /// static data member of class X, names should be looked up in the scope of 2949 /// class X. 2950 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2951 2952 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2953 /// initializer for the declaration 'Dcl'. 2954 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2955 2956 // ParseObjCStringLiteral - Parse Objective-C string literals. 2957 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2958 Expr **Strings, 2959 unsigned NumStrings); 2960 2961 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2962 TypeSourceInfo *EncodedTypeInfo, 2963 SourceLocation RParenLoc); 2964 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2965 CXXMethodDecl *Method); 2966 2967 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2968 SourceLocation EncodeLoc, 2969 SourceLocation LParenLoc, 2970 ParsedType Ty, 2971 SourceLocation RParenLoc); 2972 2973 // ParseObjCSelectorExpression - Build selector expression for @selector 2974 ExprResult ParseObjCSelectorExpression(Selector Sel, 2975 SourceLocation AtLoc, 2976 SourceLocation SelLoc, 2977 SourceLocation LParenLoc, 2978 SourceLocation RParenLoc); 2979 2980 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2981 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2982 SourceLocation AtLoc, 2983 SourceLocation ProtoLoc, 2984 SourceLocation LParenLoc, 2985 SourceLocation RParenLoc); 2986 2987 //===--------------------------------------------------------------------===// 2988 // C++ Declarations 2989 // 2990 Decl *ActOnStartLinkageSpecification(Scope *S, 2991 SourceLocation ExternLoc, 2992 SourceLocation LangLoc, 2993 llvm::StringRef Lang, 2994 SourceLocation LBraceLoc); 2995 Decl *ActOnFinishLinkageSpecification(Scope *S, 2996 Decl *LinkageSpec, 2997 SourceLocation RBraceLoc); 2998 2999 3000 //===--------------------------------------------------------------------===// 3001 // C++ Classes 3002 // 3003 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3004 const CXXScopeSpec *SS = 0); 3005 3006 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3007 SourceLocation ASLoc, 3008 SourceLocation ColonLoc); 3009 3010 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3011 Declarator &D, 3012 MultiTemplateParamsArg TemplateParameterLists, 3013 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3014 Expr *Init, bool IsDefinition, 3015 bool Deleted = false); 3016 3017 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3018 Scope *S, 3019 CXXScopeSpec &SS, 3020 IdentifierInfo *MemberOrBase, 3021 ParsedType TemplateTypeTy, 3022 SourceLocation IdLoc, 3023 SourceLocation LParenLoc, 3024 Expr **Args, unsigned NumArgs, 3025 SourceLocation RParenLoc, 3026 SourceLocation EllipsisLoc); 3027 3028 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3029 unsigned NumArgs, SourceLocation IdLoc, 3030 SourceLocation LParenLoc, 3031 SourceLocation RParenLoc); 3032 3033 MemInitResult BuildBaseInitializer(QualType BaseType, 3034 TypeSourceInfo *BaseTInfo, 3035 Expr **Args, unsigned NumArgs, 3036 SourceLocation LParenLoc, 3037 SourceLocation RParenLoc, 3038 CXXRecordDecl *ClassDecl, 3039 SourceLocation EllipsisLoc); 3040 3041 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3042 Expr **Args, unsigned NumArgs, 3043 SourceLocation BaseLoc, 3044 SourceLocation RParenLoc, 3045 SourceLocation LParenLoc, 3046 CXXRecordDecl *ClassDecl); 3047 3048 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3049 CXXCtorInitializer **Initializers, 3050 unsigned NumInitializers, bool AnyErrors); 3051 3052 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3053 3054 3055 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3056 /// mark all the non-trivial destructors of its members and bases as 3057 /// referenced. 3058 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3059 CXXRecordDecl *Record); 3060 3061 /// \brief The list of classes whose vtables have been used within 3062 /// this translation unit, and the source locations at which the 3063 /// first use occurred. 3064 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3065 3066 /// \brief The list of vtables that are required but have not yet been 3067 /// materialized. 3068 llvm::SmallVector<VTableUse, 16> VTableUses; 3069 3070 /// \brief The set of classes whose vtables have been used within 3071 /// this translation unit, and a bit that will be true if the vtable is 3072 /// required to be emitted (otherwise, it should be emitted only if needed 3073 /// by code generation). 3074 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3075 3076 /// \brief A list of all of the dynamic classes in this translation 3077 /// unit. 3078 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3079 3080 /// \brief Note that the vtable for the given class was used at the 3081 /// given location. 3082 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3083 bool DefinitionRequired = false); 3084 3085 /// MarkVirtualMembersReferenced - Will mark all members of the given 3086 /// CXXRecordDecl referenced. 3087 void MarkVirtualMembersReferenced(SourceLocation Loc, 3088 const CXXRecordDecl *RD); 3089 3090 /// \brief Define all of the vtables that have been used in this 3091 /// translation unit and reference any virtual members used by those 3092 /// vtables. 3093 /// 3094 /// \returns true if any work was done, false otherwise. 3095 bool DefineUsedVTables(); 3096 3097 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3098 3099 void ActOnMemInitializers(Decl *ConstructorDecl, 3100 SourceLocation ColonLoc, 3101 MemInitTy **MemInits, unsigned NumMemInits, 3102 bool AnyErrors); 3103 3104 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3105 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3106 Decl *TagDecl, 3107 SourceLocation LBrac, 3108 SourceLocation RBrac, 3109 AttributeList *AttrList); 3110 3111 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3112 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3113 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3114 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3115 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3116 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3117 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3118 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3119 bool IsInsideALocalClassWithinATemplateFunction(); 3120 3121 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3122 Expr *AssertExpr, 3123 Expr *AssertMessageExpr, 3124 SourceLocation RParenLoc); 3125 3126 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3127 TypeSourceInfo *TSInfo); 3128 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3129 MultiTemplateParamsArg TemplateParams); 3130 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3131 MultiTemplateParamsArg TemplateParams); 3132 3133 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3134 StorageClass& SC); 3135 void CheckConstructor(CXXConstructorDecl *Constructor); 3136 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3137 StorageClass& SC); 3138 bool CheckDestructor(CXXDestructorDecl *Destructor); 3139 void CheckConversionDeclarator(Declarator &D, QualType &R, 3140 StorageClass& SC); 3141 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3142 3143 //===--------------------------------------------------------------------===// 3144 // C++ Derived Classes 3145 // 3146 3147 /// ActOnBaseSpecifier - Parsed a base specifier 3148 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3149 SourceRange SpecifierRange, 3150 bool Virtual, AccessSpecifier Access, 3151 TypeSourceInfo *TInfo, 3152 SourceLocation EllipsisLoc); 3153 3154 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3155 SourceRange SpecifierRange, 3156 bool Virtual, AccessSpecifier Access, 3157 ParsedType basetype, 3158 SourceLocation BaseLoc, 3159 SourceLocation EllipsisLoc); 3160 3161 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3162 unsigned NumBases); 3163 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3164 3165 bool IsDerivedFrom(QualType Derived, QualType Base); 3166 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3167 3168 // FIXME: I don't like this name. 3169 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3170 3171 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3172 3173 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3174 SourceLocation Loc, SourceRange Range, 3175 CXXCastPath *BasePath = 0, 3176 bool IgnoreAccess = false); 3177 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3178 unsigned InaccessibleBaseID, 3179 unsigned AmbigiousBaseConvID, 3180 SourceLocation Loc, SourceRange Range, 3181 DeclarationName Name, 3182 CXXCastPath *BasePath); 3183 3184 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3185 3186 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3187 /// covariant, according to C++ [class.virtual]p5. 3188 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3189 const CXXMethodDecl *Old); 3190 3191 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3192 /// spec is a subset of base spec. 3193 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3194 const CXXMethodDecl *Old); 3195 3196 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3197 3198 /// CheckOverrideControl - Check C++0x override control semantics. 3199 void CheckOverrideControl(const Decl *D); 3200 3201 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3202 /// overrides a virtual member function marked 'final', according to 3203 /// C++0x [class.virtual]p3. 3204 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3205 const CXXMethodDecl *Old); 3206 3207 3208 //===--------------------------------------------------------------------===// 3209 // C++ Access Control 3210 // 3211 3212 enum AccessResult { 3213 AR_accessible, 3214 AR_inaccessible, 3215 AR_dependent, 3216 AR_delayed 3217 }; 3218 3219 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3220 NamedDecl *PrevMemberDecl, 3221 AccessSpecifier LexicalAS); 3222 3223 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3224 DeclAccessPair FoundDecl); 3225 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3226 DeclAccessPair FoundDecl); 3227 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3228 SourceRange PlacementRange, 3229 CXXRecordDecl *NamingClass, 3230 DeclAccessPair FoundDecl); 3231 AccessResult CheckConstructorAccess(SourceLocation Loc, 3232 CXXConstructorDecl *D, 3233 const InitializedEntity &Entity, 3234 AccessSpecifier Access, 3235 bool IsCopyBindingRefToTemp = false); 3236 AccessResult CheckDestructorAccess(SourceLocation Loc, 3237 CXXDestructorDecl *Dtor, 3238 const PartialDiagnostic &PDiag); 3239 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3240 NamedDecl *D, 3241 const PartialDiagnostic &PDiag); 3242 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3243 Expr *ObjectExpr, 3244 Expr *ArgExpr, 3245 DeclAccessPair FoundDecl); 3246 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3247 DeclAccessPair FoundDecl); 3248 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3249 QualType Base, QualType Derived, 3250 const CXXBasePath &Path, 3251 unsigned DiagID, 3252 bool ForceCheck = false, 3253 bool ForceUnprivileged = false); 3254 void CheckLookupAccess(const LookupResult &R); 3255 3256 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3257 const MultiLevelTemplateArgumentList &TemplateArgs); 3258 void PerformDependentDiagnostics(const DeclContext *Pattern, 3259 const MultiLevelTemplateArgumentList &TemplateArgs); 3260 3261 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3262 3263 /// A flag to suppress access checking. 3264 bool SuppressAccessChecking; 3265 3266 /// \brief When true, access checking violations are treated as SFINAE 3267 /// failures rather than hard errors. 3268 bool AccessCheckingSFINAE; 3269 3270 void ActOnStartSuppressingAccessChecks(); 3271 void ActOnStopSuppressingAccessChecks(); 3272 3273 enum AbstractDiagSelID { 3274 AbstractNone = -1, 3275 AbstractReturnType, 3276 AbstractParamType, 3277 AbstractVariableType, 3278 AbstractFieldType, 3279 AbstractArrayType 3280 }; 3281 3282 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3283 const PartialDiagnostic &PD); 3284 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3285 3286 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3287 AbstractDiagSelID SelID = AbstractNone); 3288 3289 //===--------------------------------------------------------------------===// 3290 // C++ Overloaded Operators [C++ 13.5] 3291 // 3292 3293 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3294 3295 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3296 3297 //===--------------------------------------------------------------------===// 3298 // C++ Templates [C++ 14] 3299 // 3300 void FilterAcceptableTemplateNames(LookupResult &R); 3301 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3302 3303 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3304 QualType ObjectType, bool EnteringContext, 3305 bool &MemberOfUnknownSpecialization); 3306 3307 TemplateNameKind isTemplateName(Scope *S, 3308 CXXScopeSpec &SS, 3309 bool hasTemplateKeyword, 3310 UnqualifiedId &Name, 3311 ParsedType ObjectType, 3312 bool EnteringContext, 3313 TemplateTy &Template, 3314 bool &MemberOfUnknownSpecialization); 3315 3316 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3317 SourceLocation IILoc, 3318 Scope *S, 3319 const CXXScopeSpec *SS, 3320 TemplateTy &SuggestedTemplate, 3321 TemplateNameKind &SuggestedKind); 3322 3323 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3324 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3325 3326 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3327 SourceLocation EllipsisLoc, 3328 SourceLocation KeyLoc, 3329 IdentifierInfo *ParamName, 3330 SourceLocation ParamNameLoc, 3331 unsigned Depth, unsigned Position, 3332 SourceLocation EqualLoc, 3333 ParsedType DefaultArg); 3334 3335 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3336 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3337 unsigned Depth, 3338 unsigned Position, 3339 SourceLocation EqualLoc, 3340 Expr *DefaultArg); 3341 Decl *ActOnTemplateTemplateParameter(Scope *S, 3342 SourceLocation TmpLoc, 3343 TemplateParamsTy *Params, 3344 SourceLocation EllipsisLoc, 3345 IdentifierInfo *ParamName, 3346 SourceLocation ParamNameLoc, 3347 unsigned Depth, 3348 unsigned Position, 3349 SourceLocation EqualLoc, 3350 ParsedTemplateArgument DefaultArg); 3351 3352 TemplateParamsTy * 3353 ActOnTemplateParameterList(unsigned Depth, 3354 SourceLocation ExportLoc, 3355 SourceLocation TemplateLoc, 3356 SourceLocation LAngleLoc, 3357 Decl **Params, unsigned NumParams, 3358 SourceLocation RAngleLoc); 3359 3360 /// \brief The context in which we are checking a template parameter 3361 /// list. 3362 enum TemplateParamListContext { 3363 TPC_ClassTemplate, 3364 TPC_FunctionTemplate, 3365 TPC_ClassTemplateMember, 3366 TPC_FriendFunctionTemplate, 3367 TPC_FriendFunctionTemplateDefinition 3368 }; 3369 3370 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3371 TemplateParameterList *OldParams, 3372 TemplateParamListContext TPC); 3373 TemplateParameterList * 3374 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3375 const CXXScopeSpec &SS, 3376 TemplateParameterList **ParamLists, 3377 unsigned NumParamLists, 3378 bool IsFriend, 3379 bool &IsExplicitSpecialization, 3380 bool &Invalid); 3381 3382 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3383 SourceLocation KWLoc, CXXScopeSpec &SS, 3384 IdentifierInfo *Name, SourceLocation NameLoc, 3385 AttributeList *Attr, 3386 TemplateParameterList *TemplateParams, 3387 AccessSpecifier AS, 3388 unsigned NumOuterTemplateParamLists, 3389 TemplateParameterList **OuterTemplateParamLists); 3390 3391 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3392 TemplateArgumentListInfo &Out); 3393 3394 void NoteAllFoundTemplates(TemplateName Name); 3395 3396 QualType CheckTemplateIdType(TemplateName Template, 3397 SourceLocation TemplateLoc, 3398 TemplateArgumentListInfo &TemplateArgs); 3399 3400 TypeResult 3401 ActOnTemplateIdType(CXXScopeSpec &SS, 3402 TemplateTy Template, SourceLocation TemplateLoc, 3403 SourceLocation LAngleLoc, 3404 ASTTemplateArgsPtr TemplateArgs, 3405 SourceLocation RAngleLoc); 3406 3407 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3408 /// such as \c class T::template apply<U>. 3409 /// 3410 /// \param TUK 3411 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3412 TypeSpecifierType TagSpec, 3413 SourceLocation TagLoc, 3414 CXXScopeSpec &SS, 3415 TemplateTy TemplateD, 3416 SourceLocation TemplateLoc, 3417 SourceLocation LAngleLoc, 3418 ASTTemplateArgsPtr TemplateArgsIn, 3419 SourceLocation RAngleLoc); 3420 3421 3422 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3423 LookupResult &R, 3424 bool RequiresADL, 3425 const TemplateArgumentListInfo &TemplateArgs); 3426 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3427 const DeclarationNameInfo &NameInfo, 3428 const TemplateArgumentListInfo &TemplateArgs); 3429 3430 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3431 SourceLocation TemplateKWLoc, 3432 CXXScopeSpec &SS, 3433 UnqualifiedId &Name, 3434 ParsedType ObjectType, 3435 bool EnteringContext, 3436 TemplateTy &Template); 3437 3438 DeclResult 3439 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3440 SourceLocation KWLoc, 3441 CXXScopeSpec &SS, 3442 TemplateTy Template, 3443 SourceLocation TemplateNameLoc, 3444 SourceLocation LAngleLoc, 3445 ASTTemplateArgsPtr TemplateArgs, 3446 SourceLocation RAngleLoc, 3447 AttributeList *Attr, 3448 MultiTemplateParamsArg TemplateParameterLists); 3449 3450 Decl *ActOnTemplateDeclarator(Scope *S, 3451 MultiTemplateParamsArg TemplateParameterLists, 3452 Declarator &D); 3453 3454 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3455 MultiTemplateParamsArg TemplateParameterLists, 3456 Declarator &D); 3457 3458 bool 3459 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3460 TemplateSpecializationKind NewTSK, 3461 NamedDecl *PrevDecl, 3462 TemplateSpecializationKind PrevTSK, 3463 SourceLocation PrevPtOfInstantiation, 3464 bool &SuppressNew); 3465 3466 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3467 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3468 LookupResult &Previous); 3469 3470 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3471 TemplateArgumentListInfo *ExplicitTemplateArgs, 3472 LookupResult &Previous); 3473 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3474 3475 DeclResult 3476 ActOnExplicitInstantiation(Scope *S, 3477 SourceLocation ExternLoc, 3478 SourceLocation TemplateLoc, 3479 unsigned TagSpec, 3480 SourceLocation KWLoc, 3481 const CXXScopeSpec &SS, 3482 TemplateTy Template, 3483 SourceLocation TemplateNameLoc, 3484 SourceLocation LAngleLoc, 3485 ASTTemplateArgsPtr TemplateArgs, 3486 SourceLocation RAngleLoc, 3487 AttributeList *Attr); 3488 3489 DeclResult 3490 ActOnExplicitInstantiation(Scope *S, 3491 SourceLocation ExternLoc, 3492 SourceLocation TemplateLoc, 3493 unsigned TagSpec, 3494 SourceLocation KWLoc, 3495 CXXScopeSpec &SS, 3496 IdentifierInfo *Name, 3497 SourceLocation NameLoc, 3498 AttributeList *Attr); 3499 3500 DeclResult ActOnExplicitInstantiation(Scope *S, 3501 SourceLocation ExternLoc, 3502 SourceLocation TemplateLoc, 3503 Declarator &D); 3504 3505 TemplateArgumentLoc 3506 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3507 SourceLocation TemplateLoc, 3508 SourceLocation RAngleLoc, 3509 Decl *Param, 3510 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3511 3512 /// \brief Specifies the context in which a particular template 3513 /// argument is being checked. 3514 enum CheckTemplateArgumentKind { 3515 /// \brief The template argument was specified in the code or was 3516 /// instantiated with some deduced template arguments. 3517 CTAK_Specified, 3518 3519 /// \brief The template argument was deduced via template argument 3520 /// deduction. 3521 CTAK_Deduced, 3522 3523 /// \brief The template argument was deduced from an array bound 3524 /// via template argument deduction. 3525 CTAK_DeducedFromArrayBound 3526 }; 3527 3528 bool CheckTemplateArgument(NamedDecl *Param, 3529 const TemplateArgumentLoc &Arg, 3530 NamedDecl *Template, 3531 SourceLocation TemplateLoc, 3532 SourceLocation RAngleLoc, 3533 unsigned ArgumentPackIndex, 3534 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3535 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3536 3537 /// \brief Check that the given template arguments can be be provided to 3538 /// the given template, converting the arguments along the way. 3539 /// 3540 /// \param Template The template to which the template arguments are being 3541 /// provided. 3542 /// 3543 /// \param TemplateLoc The location of the template name in the source. 3544 /// 3545 /// \param TemplateArgs The list of template arguments. If the template is 3546 /// a template template parameter, this function may extend the set of 3547 /// template arguments to also include substituted, defaulted template 3548 /// arguments. 3549 /// 3550 /// \param PartialTemplateArgs True if the list of template arguments is 3551 /// intentionally partial, e.g., because we're checking just the initial 3552 /// set of template arguments. 3553 /// 3554 /// \param Converted Will receive the converted, canonicalized template 3555 /// arguments. 3556 /// 3557 /// \returns True if an error occurred, false otherwise. 3558 bool CheckTemplateArgumentList(TemplateDecl *Template, 3559 SourceLocation TemplateLoc, 3560 TemplateArgumentListInfo &TemplateArgs, 3561 bool PartialTemplateArgs, 3562 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3563 3564 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3565 const TemplateArgumentLoc &Arg, 3566 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3567 3568 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3569 TypeSourceInfo *Arg); 3570 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3571 TemplateArgument &Converted); 3572 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3573 QualType InstantiatedParamType, Expr *Arg, 3574 TemplateArgument &Converted, 3575 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3576 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3577 const TemplateArgumentLoc &Arg); 3578 3579 ExprResult 3580 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3581 QualType ParamType, 3582 SourceLocation Loc); 3583 ExprResult 3584 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3585 SourceLocation Loc); 3586 3587 /// \brief Enumeration describing how template parameter lists are compared 3588 /// for equality. 3589 enum TemplateParameterListEqualKind { 3590 /// \brief We are matching the template parameter lists of two templates 3591 /// that might be redeclarations. 3592 /// 3593 /// \code 3594 /// template<typename T> struct X; 3595 /// template<typename T> struct X; 3596 /// \endcode 3597 TPL_TemplateMatch, 3598 3599 /// \brief We are matching the template parameter lists of two template 3600 /// template parameters as part of matching the template parameter lists 3601 /// of two templates that might be redeclarations. 3602 /// 3603 /// \code 3604 /// template<template<int I> class TT> struct X; 3605 /// template<template<int Value> class Other> struct X; 3606 /// \endcode 3607 TPL_TemplateTemplateParmMatch, 3608 3609 /// \brief We are matching the template parameter lists of a template 3610 /// template argument against the template parameter lists of a template 3611 /// template parameter. 3612 /// 3613 /// \code 3614 /// template<template<int Value> class Metafun> struct X; 3615 /// template<int Value> struct integer_c; 3616 /// X<integer_c> xic; 3617 /// \endcode 3618 TPL_TemplateTemplateArgumentMatch 3619 }; 3620 3621 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3622 TemplateParameterList *Old, 3623 bool Complain, 3624 TemplateParameterListEqualKind Kind, 3625 SourceLocation TemplateArgLoc 3626 = SourceLocation()); 3627 3628 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3629 3630 /// \brief Called when the parser has parsed a C++ typename 3631 /// specifier, e.g., "typename T::type". 3632 /// 3633 /// \param S The scope in which this typename type occurs. 3634 /// \param TypenameLoc the location of the 'typename' keyword 3635 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3636 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3637 /// \param IdLoc the location of the identifier. 3638 TypeResult 3639 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3640 const CXXScopeSpec &SS, const IdentifierInfo &II, 3641 SourceLocation IdLoc); 3642 3643 /// \brief Called when the parser has parsed a C++ typename 3644 /// specifier that ends in a template-id, e.g., 3645 /// "typename MetaFun::template apply<T1, T2>". 3646 /// 3647 /// \param S The scope in which this typename type occurs. 3648 /// \param TypenameLoc the location of the 'typename' keyword 3649 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3650 /// \param TemplateLoc the location of the 'template' keyword, if any. 3651 /// \param TemplateName The template name. 3652 /// \param TemplateNameLoc The location of the template name. 3653 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3654 /// \param TemplateArgs The template arguments. 3655 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3656 TypeResult 3657 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3658 const CXXScopeSpec &SS, 3659 SourceLocation TemplateLoc, 3660 TemplateTy Template, 3661 SourceLocation TemplateNameLoc, 3662 SourceLocation LAngleLoc, 3663 ASTTemplateArgsPtr TemplateArgs, 3664 SourceLocation RAngleLoc); 3665 3666 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3667 SourceLocation KeywordLoc, 3668 NestedNameSpecifierLoc QualifierLoc, 3669 const IdentifierInfo &II, 3670 SourceLocation IILoc); 3671 3672 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3673 SourceLocation Loc, 3674 DeclarationName Name); 3675 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3676 3677 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3678 3679 std::string 3680 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3681 const TemplateArgumentList &Args); 3682 3683 std::string 3684 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3685 const TemplateArgument *Args, 3686 unsigned NumArgs); 3687 3688 //===--------------------------------------------------------------------===// 3689 // C++ Variadic Templates (C++0x [temp.variadic]) 3690 //===--------------------------------------------------------------------===// 3691 3692 /// \brief The context in which an unexpanded parameter pack is 3693 /// being diagnosed. 3694 /// 3695 /// Note that the values of this enumeration line up with the first 3696 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3697 enum UnexpandedParameterPackContext { 3698 /// \brief An arbitrary expression. 3699 UPPC_Expression = 0, 3700 3701 /// \brief The base type of a class type. 3702 UPPC_BaseType, 3703 3704 /// \brief The type of an arbitrary declaration. 3705 UPPC_DeclarationType, 3706 3707 /// \brief The type of a data member. 3708 UPPC_DataMemberType, 3709 3710 /// \brief The size of a bit-field. 3711 UPPC_BitFieldWidth, 3712 3713 /// \brief The expression in a static assertion. 3714 UPPC_StaticAssertExpression, 3715 3716 /// \brief The fixed underlying type of an enumeration. 3717 UPPC_FixedUnderlyingType, 3718 3719 /// \brief The enumerator value. 3720 UPPC_EnumeratorValue, 3721 3722 /// \brief A using declaration. 3723 UPPC_UsingDeclaration, 3724 3725 /// \brief A friend declaration. 3726 UPPC_FriendDeclaration, 3727 3728 /// \brief A declaration qualifier. 3729 UPPC_DeclarationQualifier, 3730 3731 /// \brief An initializer. 3732 UPPC_Initializer, 3733 3734 /// \brief A default argument. 3735 UPPC_DefaultArgument, 3736 3737 /// \brief The type of a non-type template parameter. 3738 UPPC_NonTypeTemplateParameterType, 3739 3740 /// \brief The type of an exception. 3741 UPPC_ExceptionType, 3742 3743 /// \brief Partial specialization. 3744 UPPC_PartialSpecialization 3745 }; 3746 3747 /// \brief If the given type contains an unexpanded parameter pack, 3748 /// diagnose the error. 3749 /// 3750 /// \param Loc The source location where a diagnostc should be emitted. 3751 /// 3752 /// \param T The type that is being checked for unexpanded parameter 3753 /// packs. 3754 /// 3755 /// \returns true if an error occurred, false otherwise. 3756 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3757 UnexpandedParameterPackContext UPPC); 3758 3759 /// \brief If the given expression contains an unexpanded parameter 3760 /// pack, diagnose the error. 3761 /// 3762 /// \param E The expression that is being checked for unexpanded 3763 /// parameter packs. 3764 /// 3765 /// \returns true if an error occurred, false otherwise. 3766 bool DiagnoseUnexpandedParameterPack(Expr *E, 3767 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3768 3769 /// \brief If the given nested-name-specifier contains an unexpanded 3770 /// parameter pack, diagnose the error. 3771 /// 3772 /// \param SS The nested-name-specifier that is being checked for 3773 /// unexpanded parameter packs. 3774 /// 3775 /// \returns true if an error occurred, false otherwise. 3776 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3777 UnexpandedParameterPackContext UPPC); 3778 3779 /// \brief If the given name contains an unexpanded parameter pack, 3780 /// diagnose the error. 3781 /// 3782 /// \param NameInfo The name (with source location information) that 3783 /// is being checked for unexpanded parameter packs. 3784 /// 3785 /// \returns true if an error occurred, false otherwise. 3786 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3787 UnexpandedParameterPackContext UPPC); 3788 3789 /// \brief If the given template name contains an unexpanded parameter pack, 3790 /// diagnose the error. 3791 /// 3792 /// \param Loc The location of the template name. 3793 /// 3794 /// \param Template The template name that is being checked for unexpanded 3795 /// parameter packs. 3796 /// 3797 /// \returns true if an error occurred, false otherwise. 3798 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3799 TemplateName Template, 3800 UnexpandedParameterPackContext UPPC); 3801 3802 /// \brief If the given template argument contains an unexpanded parameter 3803 /// pack, diagnose the error. 3804 /// 3805 /// \param Arg The template argument that is being checked for unexpanded 3806 /// parameter packs. 3807 /// 3808 /// \returns true if an error occurred, false otherwise. 3809 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3810 UnexpandedParameterPackContext UPPC); 3811 3812 /// \brief Collect the set of unexpanded parameter packs within the given 3813 /// template argument. 3814 /// 3815 /// \param Arg The template argument that will be traversed to find 3816 /// unexpanded parameter packs. 3817 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3818 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3819 3820 /// \brief Collect the set of unexpanded parameter packs within the given 3821 /// template argument. 3822 /// 3823 /// \param Arg The template argument that will be traversed to find 3824 /// unexpanded parameter packs. 3825 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3826 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3827 3828 /// \brief Collect the set of unexpanded parameter packs within the given 3829 /// type. 3830 /// 3831 /// \param T The type that will be traversed to find 3832 /// unexpanded parameter packs. 3833 void collectUnexpandedParameterPacks(QualType T, 3834 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3835 3836 /// \brief Collect the set of unexpanded parameter packs within the given 3837 /// type. 3838 /// 3839 /// \param TL The type that will be traversed to find 3840 /// unexpanded parameter packs. 3841 void collectUnexpandedParameterPacks(TypeLoc TL, 3842 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3843 3844 /// \brief Invoked when parsing a template argument followed by an 3845 /// ellipsis, which creates a pack expansion. 3846 /// 3847 /// \param Arg The template argument preceding the ellipsis, which 3848 /// may already be invalid. 3849 /// 3850 /// \param EllipsisLoc The location of the ellipsis. 3851 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3852 SourceLocation EllipsisLoc); 3853 3854 /// \brief Invoked when parsing a type followed by an ellipsis, which 3855 /// creates a pack expansion. 3856 /// 3857 /// \param Type The type preceding the ellipsis, which will become 3858 /// the pattern of the pack expansion. 3859 /// 3860 /// \param EllipsisLoc The location of the ellipsis. 3861 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3862 3863 /// \brief Construct a pack expansion type from the pattern of the pack 3864 /// expansion. 3865 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3866 SourceLocation EllipsisLoc, 3867 llvm::Optional<unsigned> NumExpansions); 3868 3869 /// \brief Construct a pack expansion type from the pattern of the pack 3870 /// expansion. 3871 QualType CheckPackExpansion(QualType Pattern, 3872 SourceRange PatternRange, 3873 SourceLocation EllipsisLoc, 3874 llvm::Optional<unsigned> NumExpansions); 3875 3876 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3877 /// creates a pack expansion. 3878 /// 3879 /// \param Pattern The expression preceding the ellipsis, which will become 3880 /// the pattern of the pack expansion. 3881 /// 3882 /// \param EllipsisLoc The location of the ellipsis. 3883 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3884 3885 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3886 /// creates a pack expansion. 3887 /// 3888 /// \param Pattern The expression preceding the ellipsis, which will become 3889 /// the pattern of the pack expansion. 3890 /// 3891 /// \param EllipsisLoc The location of the ellipsis. 3892 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3893 llvm::Optional<unsigned> NumExpansions); 3894 3895 /// \brief Determine whether we could expand a pack expansion with the 3896 /// given set of parameter packs into separate arguments by repeatedly 3897 /// transforming the pattern. 3898 /// 3899 /// \param EllipsisLoc The location of the ellipsis that identifies the 3900 /// pack expansion. 3901 /// 3902 /// \param PatternRange The source range that covers the entire pattern of 3903 /// the pack expansion. 3904 /// 3905 /// \param Unexpanded The set of unexpanded parameter packs within the 3906 /// pattern. 3907 /// 3908 /// \param NumUnexpanded The number of unexpanded parameter packs in 3909 /// \p Unexpanded. 3910 /// 3911 /// \param ShouldExpand Will be set to \c true if the transformer should 3912 /// expand the corresponding pack expansions into separate arguments. When 3913 /// set, \c NumExpansions must also be set. 3914 /// 3915 /// \param RetainExpansion Whether the caller should add an unexpanded 3916 /// pack expansion after all of the expanded arguments. This is used 3917 /// when extending explicitly-specified template argument packs per 3918 /// C++0x [temp.arg.explicit]p9. 3919 /// 3920 /// \param NumExpansions The number of separate arguments that will be in 3921 /// the expanded form of the corresponding pack expansion. This is both an 3922 /// input and an output parameter, which can be set by the caller if the 3923 /// number of expansions is known a priori (e.g., due to a prior substitution) 3924 /// and will be set by the callee when the number of expansions is known. 3925 /// The callee must set this value when \c ShouldExpand is \c true; it may 3926 /// set this value in other cases. 3927 /// 3928 /// \returns true if an error occurred (e.g., because the parameter packs 3929 /// are to be instantiated with arguments of different lengths), false 3930 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3931 /// must be set. 3932 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3933 SourceRange PatternRange, 3934 const UnexpandedParameterPack *Unexpanded, 3935 unsigned NumUnexpanded, 3936 const MultiLevelTemplateArgumentList &TemplateArgs, 3937 bool &ShouldExpand, 3938 bool &RetainExpansion, 3939 llvm::Optional<unsigned> &NumExpansions); 3940 3941 /// \brief Determine the number of arguments in the given pack expansion 3942 /// type. 3943 /// 3944 /// This routine already assumes that the pack expansion type can be 3945 /// expanded and that the number of arguments in the expansion is 3946 /// consistent across all of the unexpanded parameter packs in its pattern. 3947 unsigned getNumArgumentsInExpansion(QualType T, 3948 const MultiLevelTemplateArgumentList &TemplateArgs); 3949 3950 /// \brief Determine whether the given declarator contains any unexpanded 3951 /// parameter packs. 3952 /// 3953 /// This routine is used by the parser to disambiguate function declarators 3954 /// with an ellipsis prior to the ')', e.g., 3955 /// 3956 /// \code 3957 /// void f(T...); 3958 /// \endcode 3959 /// 3960 /// To determine whether we have an (unnamed) function parameter pack or 3961 /// a variadic function. 3962 /// 3963 /// \returns true if the declarator contains any unexpanded parameter packs, 3964 /// false otherwise. 3965 bool containsUnexpandedParameterPacks(Declarator &D); 3966 3967 //===--------------------------------------------------------------------===// 3968 // C++ Template Argument Deduction (C++ [temp.deduct]) 3969 //===--------------------------------------------------------------------===// 3970 3971 /// \brief Describes the result of template argument deduction. 3972 /// 3973 /// The TemplateDeductionResult enumeration describes the result of 3974 /// template argument deduction, as returned from 3975 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3976 /// structure provides additional information about the results of 3977 /// template argument deduction, e.g., the deduced template argument 3978 /// list (if successful) or the specific template parameters or 3979 /// deduced arguments that were involved in the failure. 3980 enum TemplateDeductionResult { 3981 /// \brief Template argument deduction was successful. 3982 TDK_Success = 0, 3983 /// \brief Template argument deduction exceeded the maximum template 3984 /// instantiation depth (which has already been diagnosed). 3985 TDK_InstantiationDepth, 3986 /// \brief Template argument deduction did not deduce a value 3987 /// for every template parameter. 3988 TDK_Incomplete, 3989 /// \brief Template argument deduction produced inconsistent 3990 /// deduced values for the given template parameter. 3991 TDK_Inconsistent, 3992 /// \brief Template argument deduction failed due to inconsistent 3993 /// cv-qualifiers on a template parameter type that would 3994 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3995 /// but were given a non-const "X". 3996 TDK_Underqualified, 3997 /// \brief Substitution of the deduced template argument values 3998 /// resulted in an error. 3999 TDK_SubstitutionFailure, 4000 /// \brief Substitution of the deduced template argument values 4001 /// into a non-deduced context produced a type or value that 4002 /// produces a type that does not match the original template 4003 /// arguments provided. 4004 TDK_NonDeducedMismatch, 4005 /// \brief When performing template argument deduction for a function 4006 /// template, there were too many call arguments. 4007 TDK_TooManyArguments, 4008 /// \brief When performing template argument deduction for a function 4009 /// template, there were too few call arguments. 4010 TDK_TooFewArguments, 4011 /// \brief The explicitly-specified template arguments were not valid 4012 /// template arguments for the given template. 4013 TDK_InvalidExplicitArguments, 4014 /// \brief The arguments included an overloaded function name that could 4015 /// not be resolved to a suitable function. 4016 TDK_FailedOverloadResolution 4017 }; 4018 4019 TemplateDeductionResult 4020 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4021 const TemplateArgumentList &TemplateArgs, 4022 sema::TemplateDeductionInfo &Info); 4023 4024 TemplateDeductionResult 4025 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4026 TemplateArgumentListInfo &ExplicitTemplateArgs, 4027 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4028 llvm::SmallVectorImpl<QualType> &ParamTypes, 4029 QualType *FunctionType, 4030 sema::TemplateDeductionInfo &Info); 4031 4032 TemplateDeductionResult 4033 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4034 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4035 unsigned NumExplicitlySpecified, 4036 FunctionDecl *&Specialization, 4037 sema::TemplateDeductionInfo &Info); 4038 4039 TemplateDeductionResult 4040 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4041 TemplateArgumentListInfo *ExplicitTemplateArgs, 4042 Expr **Args, unsigned NumArgs, 4043 FunctionDecl *&Specialization, 4044 sema::TemplateDeductionInfo &Info); 4045 4046 TemplateDeductionResult 4047 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4048 TemplateArgumentListInfo *ExplicitTemplateArgs, 4049 QualType ArgFunctionType, 4050 FunctionDecl *&Specialization, 4051 sema::TemplateDeductionInfo &Info); 4052 4053 TemplateDeductionResult 4054 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4055 QualType ToType, 4056 CXXConversionDecl *&Specialization, 4057 sema::TemplateDeductionInfo &Info); 4058 4059 TemplateDeductionResult 4060 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4061 TemplateArgumentListInfo *ExplicitTemplateArgs, 4062 FunctionDecl *&Specialization, 4063 sema::TemplateDeductionInfo &Info); 4064 4065 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4066 TypeSourceInfo *&Result); 4067 4068 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4069 FunctionTemplateDecl *FT2, 4070 SourceLocation Loc, 4071 TemplatePartialOrderingContext TPOC, 4072 unsigned NumCallArguments); 4073 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4074 UnresolvedSetIterator SEnd, 4075 TemplatePartialOrderingContext TPOC, 4076 unsigned NumCallArguments, 4077 SourceLocation Loc, 4078 const PartialDiagnostic &NoneDiag, 4079 const PartialDiagnostic &AmbigDiag, 4080 const PartialDiagnostic &CandidateDiag, 4081 bool Complain = true); 4082 4083 ClassTemplatePartialSpecializationDecl * 4084 getMoreSpecializedPartialSpecialization( 4085 ClassTemplatePartialSpecializationDecl *PS1, 4086 ClassTemplatePartialSpecializationDecl *PS2, 4087 SourceLocation Loc); 4088 4089 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4090 bool OnlyDeduced, 4091 unsigned Depth, 4092 llvm::SmallVectorImpl<bool> &Used); 4093 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4094 llvm::SmallVectorImpl<bool> &Deduced); 4095 4096 //===--------------------------------------------------------------------===// 4097 // C++ Template Instantiation 4098 // 4099 4100 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4101 const TemplateArgumentList *Innermost = 0, 4102 bool RelativeToPrimary = false, 4103 const FunctionDecl *Pattern = 0); 4104 4105 /// \brief A template instantiation that is currently in progress. 4106 struct ActiveTemplateInstantiation { 4107 /// \brief The kind of template instantiation we are performing 4108 enum InstantiationKind { 4109 /// We are instantiating a template declaration. The entity is 4110 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4111 TemplateInstantiation, 4112 4113 /// We are instantiating a default argument for a template 4114 /// parameter. The Entity is the template, and 4115 /// TemplateArgs/NumTemplateArguments provides the template 4116 /// arguments as specified. 4117 /// FIXME: Use a TemplateArgumentList 4118 DefaultTemplateArgumentInstantiation, 4119 4120 /// We are instantiating a default argument for a function. 4121 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4122 /// provides the template arguments as specified. 4123 DefaultFunctionArgumentInstantiation, 4124 4125 /// We are substituting explicit template arguments provided for 4126 /// a function template. The entity is a FunctionTemplateDecl. 4127 ExplicitTemplateArgumentSubstitution, 4128 4129 /// We are substituting template argument determined as part of 4130 /// template argument deduction for either a class template 4131 /// partial specialization or a function template. The 4132 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4133 /// a FunctionTemplateDecl. 4134 DeducedTemplateArgumentSubstitution, 4135 4136 /// We are substituting prior template arguments into a new 4137 /// template parameter. The template parameter itself is either a 4138 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4139 PriorTemplateArgumentSubstitution, 4140 4141 /// We are checking the validity of a default template argument that 4142 /// has been used when naming a template-id. 4143 DefaultTemplateArgumentChecking 4144 } Kind; 4145 4146 /// \brief The point of instantiation within the source code. 4147 SourceLocation PointOfInstantiation; 4148 4149 /// \brief The template (or partial specialization) in which we are 4150 /// performing the instantiation, for substitutions of prior template 4151 /// arguments. 4152 NamedDecl *Template; 4153 4154 /// \brief The entity that is being instantiated. 4155 uintptr_t Entity; 4156 4157 /// \brief The list of template arguments we are substituting, if they 4158 /// are not part of the entity. 4159 const TemplateArgument *TemplateArgs; 4160 4161 /// \brief The number of template arguments in TemplateArgs. 4162 unsigned NumTemplateArgs; 4163 4164 /// \brief The template deduction info object associated with the 4165 /// substitution or checking of explicit or deduced template arguments. 4166 sema::TemplateDeductionInfo *DeductionInfo; 4167 4168 /// \brief The source range that covers the construct that cause 4169 /// the instantiation, e.g., the template-id that causes a class 4170 /// template instantiation. 4171 SourceRange InstantiationRange; 4172 4173 ActiveTemplateInstantiation() 4174 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4175 NumTemplateArgs(0), DeductionInfo(0) {} 4176 4177 /// \brief Determines whether this template is an actual instantiation 4178 /// that should be counted toward the maximum instantiation depth. 4179 bool isInstantiationRecord() const; 4180 4181 friend bool operator==(const ActiveTemplateInstantiation &X, 4182 const ActiveTemplateInstantiation &Y) { 4183 if (X.Kind != Y.Kind) 4184 return false; 4185 4186 if (X.Entity != Y.Entity) 4187 return false; 4188 4189 switch (X.Kind) { 4190 case TemplateInstantiation: 4191 return true; 4192 4193 case PriorTemplateArgumentSubstitution: 4194 case DefaultTemplateArgumentChecking: 4195 if (X.Template != Y.Template) 4196 return false; 4197 4198 // Fall through 4199 4200 case DefaultTemplateArgumentInstantiation: 4201 case ExplicitTemplateArgumentSubstitution: 4202 case DeducedTemplateArgumentSubstitution: 4203 case DefaultFunctionArgumentInstantiation: 4204 return X.TemplateArgs == Y.TemplateArgs; 4205 4206 } 4207 4208 return true; 4209 } 4210 4211 friend bool operator!=(const ActiveTemplateInstantiation &X, 4212 const ActiveTemplateInstantiation &Y) { 4213 return !(X == Y); 4214 } 4215 }; 4216 4217 /// \brief List of active template instantiations. 4218 /// 4219 /// This vector is treated as a stack. As one template instantiation 4220 /// requires another template instantiation, additional 4221 /// instantiations are pushed onto the stack up to a 4222 /// user-configurable limit LangOptions::InstantiationDepth. 4223 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4224 ActiveTemplateInstantiations; 4225 4226 /// \brief Whether we are in a SFINAE context that is not associated with 4227 /// template instantiation. 4228 /// 4229 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4230 /// of a template instantiation or template argument deduction. 4231 bool InNonInstantiationSFINAEContext; 4232 4233 /// \brief The number of ActiveTemplateInstantiation entries in 4234 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4235 /// therefore, should not be counted as part of the instantiation depth. 4236 unsigned NonInstantiationEntries; 4237 4238 /// \brief The last template from which a template instantiation 4239 /// error or warning was produced. 4240 /// 4241 /// This value is used to suppress printing of redundant template 4242 /// instantiation backtraces when there are multiple errors in the 4243 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4244 /// to implement it anywhere else. 4245 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4246 4247 /// \brief The current index into pack expansion arguments that will be 4248 /// used for substitution of parameter packs. 4249 /// 4250 /// The pack expansion index will be -1 to indicate that parameter packs 4251 /// should be instantiated as themselves. Otherwise, the index specifies 4252 /// which argument within the parameter pack will be used for substitution. 4253 int ArgumentPackSubstitutionIndex; 4254 4255 /// \brief RAII object used to change the argument pack substitution index 4256 /// within a \c Sema object. 4257 /// 4258 /// See \c ArgumentPackSubstitutionIndex for more information. 4259 class ArgumentPackSubstitutionIndexRAII { 4260 Sema &Self; 4261 int OldSubstitutionIndex; 4262 4263 public: 4264 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4265 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4266 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4267 } 4268 4269 ~ArgumentPackSubstitutionIndexRAII() { 4270 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4271 } 4272 }; 4273 4274 friend class ArgumentPackSubstitutionRAII; 4275 4276 /// \brief The stack of calls expression undergoing template instantiation. 4277 /// 4278 /// The top of this stack is used by a fixit instantiating unresolved 4279 /// function calls to fix the AST to match the textual change it prints. 4280 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4281 4282 /// \brief For each declaration that involved template argument deduction, the 4283 /// set of diagnostics that were suppressed during that template argument 4284 /// deduction. 4285 /// 4286 /// FIXME: Serialize this structure to the AST file. 4287 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4288 SuppressedDiagnostics; 4289 4290 /// \brief A stack object to be created when performing template 4291 /// instantiation. 4292 /// 4293 /// Construction of an object of type \c InstantiatingTemplate 4294 /// pushes the current instantiation onto the stack of active 4295 /// instantiations. If the size of this stack exceeds the maximum 4296 /// number of recursive template instantiations, construction 4297 /// produces an error and evaluates true. 4298 /// 4299 /// Destruction of this object will pop the named instantiation off 4300 /// the stack. 4301 struct InstantiatingTemplate { 4302 /// \brief Note that we are instantiating a class template, 4303 /// function template, or a member thereof. 4304 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4305 Decl *Entity, 4306 SourceRange InstantiationRange = SourceRange()); 4307 4308 /// \brief Note that we are instantiating a default argument in a 4309 /// template-id. 4310 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4311 TemplateDecl *Template, 4312 const TemplateArgument *TemplateArgs, 4313 unsigned NumTemplateArgs, 4314 SourceRange InstantiationRange = SourceRange()); 4315 4316 /// \brief Note that we are instantiating a default argument in a 4317 /// template-id. 4318 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4319 FunctionTemplateDecl *FunctionTemplate, 4320 const TemplateArgument *TemplateArgs, 4321 unsigned NumTemplateArgs, 4322 ActiveTemplateInstantiation::InstantiationKind Kind, 4323 sema::TemplateDeductionInfo &DeductionInfo, 4324 SourceRange InstantiationRange = SourceRange()); 4325 4326 /// \brief Note that we are instantiating as part of template 4327 /// argument deduction for a class template partial 4328 /// specialization. 4329 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4330 ClassTemplatePartialSpecializationDecl *PartialSpec, 4331 const TemplateArgument *TemplateArgs, 4332 unsigned NumTemplateArgs, 4333 sema::TemplateDeductionInfo &DeductionInfo, 4334 SourceRange InstantiationRange = SourceRange()); 4335 4336 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4337 ParmVarDecl *Param, 4338 const TemplateArgument *TemplateArgs, 4339 unsigned NumTemplateArgs, 4340 SourceRange InstantiationRange = SourceRange()); 4341 4342 /// \brief Note that we are substituting prior template arguments into a 4343 /// non-type or template template parameter. 4344 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4345 NamedDecl *Template, 4346 NonTypeTemplateParmDecl *Param, 4347 const TemplateArgument *TemplateArgs, 4348 unsigned NumTemplateArgs, 4349 SourceRange InstantiationRange); 4350 4351 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4352 NamedDecl *Template, 4353 TemplateTemplateParmDecl *Param, 4354 const TemplateArgument *TemplateArgs, 4355 unsigned NumTemplateArgs, 4356 SourceRange InstantiationRange); 4357 4358 /// \brief Note that we are checking the default template argument 4359 /// against the template parameter for a given template-id. 4360 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4361 TemplateDecl *Template, 4362 NamedDecl *Param, 4363 const TemplateArgument *TemplateArgs, 4364 unsigned NumTemplateArgs, 4365 SourceRange InstantiationRange); 4366 4367 4368 /// \brief Note that we have finished instantiating this template. 4369 void Clear(); 4370 4371 ~InstantiatingTemplate() { Clear(); } 4372 4373 /// \brief Determines whether we have exceeded the maximum 4374 /// recursive template instantiations. 4375 operator bool() const { return Invalid; } 4376 4377 private: 4378 Sema &SemaRef; 4379 bool Invalid; 4380 bool SavedInNonInstantiationSFINAEContext; 4381 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4382 SourceRange InstantiationRange); 4383 4384 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4385 4386 InstantiatingTemplate& 4387 operator=(const InstantiatingTemplate&); // not implemented 4388 }; 4389 4390 void PrintInstantiationStack(); 4391 4392 /// \brief Determines whether we are currently in a context where 4393 /// template argument substitution failures are not considered 4394 /// errors. 4395 /// 4396 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4397 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4398 /// template-deduction context object, which can be used to capture 4399 /// diagnostics that will be suppressed. 4400 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4401 4402 /// \brief RAII class used to determine whether SFINAE has 4403 /// trapped any errors that occur during template argument 4404 /// deduction.` 4405 class SFINAETrap { 4406 Sema &SemaRef; 4407 unsigned PrevSFINAEErrors; 4408 bool PrevInNonInstantiationSFINAEContext; 4409 bool PrevAccessCheckingSFINAE; 4410 4411 public: 4412 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4413 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4414 PrevInNonInstantiationSFINAEContext( 4415 SemaRef.InNonInstantiationSFINAEContext), 4416 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4417 { 4418 if (!SemaRef.isSFINAEContext()) 4419 SemaRef.InNonInstantiationSFINAEContext = true; 4420 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4421 } 4422 4423 ~SFINAETrap() { 4424 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4425 SemaRef.InNonInstantiationSFINAEContext 4426 = PrevInNonInstantiationSFINAEContext; 4427 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4428 } 4429 4430 /// \brief Determine whether any SFINAE errors have been trapped. 4431 bool hasErrorOccurred() const { 4432 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4433 } 4434 }; 4435 4436 /// \brief The current instantiation scope used to store local 4437 /// variables. 4438 LocalInstantiationScope *CurrentInstantiationScope; 4439 4440 /// \brief The number of typos corrected by CorrectTypo. 4441 unsigned TyposCorrected; 4442 4443 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4444 UnqualifiedTyposCorrectedMap; 4445 4446 /// \brief A cache containing the results of typo correction for unqualified 4447 /// name lookup. 4448 /// 4449 /// The string is the string that we corrected to (which may be empty, if 4450 /// there was no correction), while the boolean will be true when the 4451 /// string represents a keyword. 4452 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4453 4454 /// \brief Worker object for performing CFG-based warnings. 4455 sema::AnalysisBasedWarnings AnalysisWarnings; 4456 4457 /// \brief An entity for which implicit template instantiation is required. 4458 /// 4459 /// The source location associated with the declaration is the first place in 4460 /// the source code where the declaration was "used". It is not necessarily 4461 /// the point of instantiation (which will be either before or after the 4462 /// namespace-scope declaration that triggered this implicit instantiation), 4463 /// However, it is the location that diagnostics should generally refer to, 4464 /// because users will need to know what code triggered the instantiation. 4465 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4466 4467 /// \brief The queue of implicit template instantiations that are required 4468 /// but have not yet been performed. 4469 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4470 4471 /// \brief The queue of implicit template instantiations that are required 4472 /// and must be performed within the current local scope. 4473 /// 4474 /// This queue is only used for member functions of local classes in 4475 /// templates, which must be instantiated in the same scope as their 4476 /// enclosing function, so that they can reference function-local 4477 /// types, static variables, enumerators, etc. 4478 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4479 4480 bool PerformPendingInstantiations(bool LocalOnly = false); 4481 4482 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4483 const MultiLevelTemplateArgumentList &TemplateArgs, 4484 SourceLocation Loc, DeclarationName Entity); 4485 4486 QualType SubstType(QualType T, 4487 const MultiLevelTemplateArgumentList &TemplateArgs, 4488 SourceLocation Loc, DeclarationName Entity); 4489 4490 TypeSourceInfo *SubstType(TypeLoc TL, 4491 const MultiLevelTemplateArgumentList &TemplateArgs, 4492 SourceLocation Loc, DeclarationName Entity); 4493 4494 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4495 const MultiLevelTemplateArgumentList &TemplateArgs, 4496 SourceLocation Loc, 4497 DeclarationName Entity); 4498 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4499 const MultiLevelTemplateArgumentList &TemplateArgs, 4500 llvm::Optional<unsigned> NumExpansions); 4501 bool SubstParmTypes(SourceLocation Loc, 4502 ParmVarDecl **Params, unsigned NumParams, 4503 const MultiLevelTemplateArgumentList &TemplateArgs, 4504 llvm::SmallVectorImpl<QualType> &ParamTypes, 4505 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4506 ExprResult SubstExpr(Expr *E, 4507 const MultiLevelTemplateArgumentList &TemplateArgs); 4508 4509 /// \brief Substitute the given template arguments into a list of 4510 /// expressions, expanding pack expansions if required. 4511 /// 4512 /// \param Exprs The list of expressions to substitute into. 4513 /// 4514 /// \param NumExprs The number of expressions in \p Exprs. 4515 /// 4516 /// \param IsCall Whether this is some form of call, in which case 4517 /// default arguments will be dropped. 4518 /// 4519 /// \param TemplateArgs The set of template arguments to substitute. 4520 /// 4521 /// \param Outputs Will receive all of the substituted arguments. 4522 /// 4523 /// \returns true if an error occurred, false otherwise. 4524 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4525 const MultiLevelTemplateArgumentList &TemplateArgs, 4526 llvm::SmallVectorImpl<Expr *> &Outputs); 4527 4528 StmtResult SubstStmt(Stmt *S, 4529 const MultiLevelTemplateArgumentList &TemplateArgs); 4530 4531 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4532 const MultiLevelTemplateArgumentList &TemplateArgs); 4533 4534 bool 4535 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4536 CXXRecordDecl *Pattern, 4537 const MultiLevelTemplateArgumentList &TemplateArgs); 4538 4539 bool 4540 InstantiateClass(SourceLocation PointOfInstantiation, 4541 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4542 const MultiLevelTemplateArgumentList &TemplateArgs, 4543 TemplateSpecializationKind TSK, 4544 bool Complain = true); 4545 4546 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4547 Decl *Pattern, Decl *Inst); 4548 4549 bool 4550 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4551 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4552 TemplateSpecializationKind TSK, 4553 bool Complain = true); 4554 4555 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4556 CXXRecordDecl *Instantiation, 4557 const MultiLevelTemplateArgumentList &TemplateArgs, 4558 TemplateSpecializationKind TSK); 4559 4560 void InstantiateClassTemplateSpecializationMembers( 4561 SourceLocation PointOfInstantiation, 4562 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4563 TemplateSpecializationKind TSK); 4564 4565 NestedNameSpecifierLoc 4566 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4567 const MultiLevelTemplateArgumentList &TemplateArgs); 4568 4569 DeclarationNameInfo 4570 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4571 const MultiLevelTemplateArgumentList &TemplateArgs); 4572 TemplateName 4573 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4574 SourceLocation Loc, 4575 const MultiLevelTemplateArgumentList &TemplateArgs); 4576 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4577 TemplateArgumentListInfo &Result, 4578 const MultiLevelTemplateArgumentList &TemplateArgs); 4579 4580 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4581 FunctionDecl *Function, 4582 bool Recursive = false, 4583 bool DefinitionRequired = false); 4584 void InstantiateStaticDataMemberDefinition( 4585 SourceLocation PointOfInstantiation, 4586 VarDecl *Var, 4587 bool Recursive = false, 4588 bool DefinitionRequired = false); 4589 4590 void InstantiateMemInitializers(CXXConstructorDecl *New, 4591 const CXXConstructorDecl *Tmpl, 4592 const MultiLevelTemplateArgumentList &TemplateArgs); 4593 4594 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4595 const MultiLevelTemplateArgumentList &TemplateArgs); 4596 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4597 const MultiLevelTemplateArgumentList &TemplateArgs); 4598 4599 // Objective-C declarations. 4600 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4601 IdentifierInfo *ClassName, 4602 SourceLocation ClassLoc, 4603 IdentifierInfo *SuperName, 4604 SourceLocation SuperLoc, 4605 Decl * const *ProtoRefs, 4606 unsigned NumProtoRefs, 4607 const SourceLocation *ProtoLocs, 4608 SourceLocation EndProtoLoc, 4609 AttributeList *AttrList); 4610 4611 Decl *ActOnCompatiblityAlias( 4612 SourceLocation AtCompatibilityAliasLoc, 4613 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4614 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4615 4616 void CheckForwardProtocolDeclarationForCircularDependency( 4617 IdentifierInfo *PName, 4618 SourceLocation &PLoc, SourceLocation PrevLoc, 4619 const ObjCList<ObjCProtocolDecl> &PList); 4620 4621 Decl *ActOnStartProtocolInterface( 4622 SourceLocation AtProtoInterfaceLoc, 4623 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4624 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4625 const SourceLocation *ProtoLocs, 4626 SourceLocation EndProtoLoc, 4627 AttributeList *AttrList); 4628 4629 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4630 IdentifierInfo *ClassName, 4631 SourceLocation ClassLoc, 4632 IdentifierInfo *CategoryName, 4633 SourceLocation CategoryLoc, 4634 Decl * const *ProtoRefs, 4635 unsigned NumProtoRefs, 4636 const SourceLocation *ProtoLocs, 4637 SourceLocation EndProtoLoc); 4638 4639 Decl *ActOnStartClassImplementation( 4640 SourceLocation AtClassImplLoc, 4641 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4642 IdentifierInfo *SuperClassname, 4643 SourceLocation SuperClassLoc); 4644 4645 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4646 IdentifierInfo *ClassName, 4647 SourceLocation ClassLoc, 4648 IdentifierInfo *CatName, 4649 SourceLocation CatLoc); 4650 4651 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4652 IdentifierInfo **IdentList, 4653 SourceLocation *IdentLocs, 4654 unsigned NumElts); 4655 4656 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4657 const IdentifierLocPair *IdentList, 4658 unsigned NumElts, 4659 AttributeList *attrList); 4660 4661 void FindProtocolDeclaration(bool WarnOnDeclarations, 4662 const IdentifierLocPair *ProtocolId, 4663 unsigned NumProtocols, 4664 llvm::SmallVectorImpl<Decl *> &Protocols); 4665 4666 /// Ensure attributes are consistent with type. 4667 /// \param [in, out] Attributes The attributes to check; they will 4668 /// be modified to be consistent with \arg PropertyTy. 4669 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4670 SourceLocation Loc, 4671 unsigned &Attributes); 4672 4673 /// Process the specified property declaration and create decls for the 4674 /// setters and getters as needed. 4675 /// \param property The property declaration being processed 4676 /// \param DC The semantic container for the property 4677 /// \param redeclaredProperty Declaration for property if redeclared 4678 /// in class extension. 4679 /// \param lexicalDC Container for redeclaredProperty. 4680 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4681 ObjCContainerDecl *DC, 4682 ObjCPropertyDecl *redeclaredProperty = 0, 4683 ObjCContainerDecl *lexicalDC = 0); 4684 4685 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4686 ObjCPropertyDecl *SuperProperty, 4687 const IdentifierInfo *Name); 4688 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4689 4690 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4691 ObjCMethodDecl *MethodDecl, 4692 bool IsInstance); 4693 4694 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4695 4696 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4697 ObjCInterfaceDecl *ID); 4698 4699 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4700 ObjCProtocolDecl *PDecl); 4701 4702 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4703 Decl **allMethods = 0, unsigned allNum = 0, 4704 Decl **allProperties = 0, unsigned pNum = 0, 4705 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4706 4707 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4708 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4709 Selector GetterSel, Selector SetterSel, 4710 Decl *ClassCategory, 4711 bool *OverridingProperty, 4712 tok::ObjCKeywordKind MethodImplKind, 4713 DeclContext *lexicalDC = 0); 4714 4715 Decl *ActOnPropertyImplDecl(Scope *S, 4716 SourceLocation AtLoc, 4717 SourceLocation PropertyLoc, 4718 bool ImplKind,Decl *ClassImplDecl, 4719 IdentifierInfo *PropertyId, 4720 IdentifierInfo *PropertyIvar, 4721 SourceLocation PropertyIvarLoc); 4722 4723 struct ObjCArgInfo { 4724 IdentifierInfo *Name; 4725 SourceLocation NameLoc; 4726 // The Type is null if no type was specified, and the DeclSpec is invalid 4727 // in this case. 4728 ParsedType Type; 4729 ObjCDeclSpec DeclSpec; 4730 4731 /// ArgAttrs - Attribute list for this argument. 4732 AttributeList *ArgAttrs; 4733 }; 4734 4735 Decl *ActOnMethodDeclaration( 4736 Scope *S, 4737 SourceLocation BeginLoc, // location of the + or -. 4738 SourceLocation EndLoc, // location of the ; or {. 4739 tok::TokenKind MethodType, 4740 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4741 Selector Sel, 4742 // optional arguments. The number of types/arguments is obtained 4743 // from the Sel.getNumArgs(). 4744 ObjCArgInfo *ArgInfo, 4745 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4746 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4747 bool isVariadic, bool MethodDefinition); 4748 4749 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4750 // Will search "local" class/category implementations for a method decl. 4751 // Will also search in class's root looking for instance method. 4752 // Returns 0 if no method is found. 4753 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4754 ObjCInterfaceDecl *CDecl); 4755 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4756 ObjCInterfaceDecl *ClassDecl); 4757 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 4758 const ObjCObjectPointerType *OPT, 4759 bool IsInstance); 4760 4761 ExprResult 4762 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4763 Expr *BaseExpr, 4764 DeclarationName MemberName, 4765 SourceLocation MemberLoc, 4766 SourceLocation SuperLoc, QualType SuperType, 4767 bool Super); 4768 4769 ExprResult 4770 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4771 IdentifierInfo &propertyName, 4772 SourceLocation receiverNameLoc, 4773 SourceLocation propertyNameLoc); 4774 4775 ObjCMethodDecl *tryCaptureObjCSelf(); 4776 4777 /// \brief Describes the kind of message expression indicated by a message 4778 /// send that starts with an identifier. 4779 enum ObjCMessageKind { 4780 /// \brief The message is sent to 'super'. 4781 ObjCSuperMessage, 4782 /// \brief The message is an instance message. 4783 ObjCInstanceMessage, 4784 /// \brief The message is a class message, and the identifier is a type 4785 /// name. 4786 ObjCClassMessage 4787 }; 4788 4789 ObjCMessageKind getObjCMessageKind(Scope *S, 4790 IdentifierInfo *Name, 4791 SourceLocation NameLoc, 4792 bool IsSuper, 4793 bool HasTrailingDot, 4794 ParsedType &ReceiverType); 4795 4796 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4797 Selector Sel, 4798 SourceLocation LBracLoc, 4799 SourceLocation SelectorLoc, 4800 SourceLocation RBracLoc, 4801 MultiExprArg Args); 4802 4803 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4804 QualType ReceiverType, 4805 SourceLocation SuperLoc, 4806 Selector Sel, 4807 ObjCMethodDecl *Method, 4808 SourceLocation LBracLoc, 4809 SourceLocation SelectorLoc, 4810 SourceLocation RBracLoc, 4811 MultiExprArg Args); 4812 4813 ExprResult ActOnClassMessage(Scope *S, 4814 ParsedType Receiver, 4815 Selector Sel, 4816 SourceLocation LBracLoc, 4817 SourceLocation SelectorLoc, 4818 SourceLocation RBracLoc, 4819 MultiExprArg Args); 4820 4821 ExprResult BuildInstanceMessage(Expr *Receiver, 4822 QualType ReceiverType, 4823 SourceLocation SuperLoc, 4824 Selector Sel, 4825 ObjCMethodDecl *Method, 4826 SourceLocation LBracLoc, 4827 SourceLocation SelectorLoc, 4828 SourceLocation RBracLoc, 4829 MultiExprArg Args); 4830 4831 ExprResult ActOnInstanceMessage(Scope *S, 4832 Expr *Receiver, 4833 Selector Sel, 4834 SourceLocation LBracLoc, 4835 SourceLocation SelectorLoc, 4836 SourceLocation RBracLoc, 4837 MultiExprArg Args); 4838 4839 4840 enum PragmaOptionsAlignKind { 4841 POAK_Native, // #pragma options align=native 4842 POAK_Natural, // #pragma options align=natural 4843 POAK_Packed, // #pragma options align=packed 4844 POAK_Power, // #pragma options align=power 4845 POAK_Mac68k, // #pragma options align=mac68k 4846 POAK_Reset // #pragma options align=reset 4847 }; 4848 4849 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4850 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4851 SourceLocation PragmaLoc, 4852 SourceLocation KindLoc); 4853 4854 enum PragmaPackKind { 4855 PPK_Default, // #pragma pack([n]) 4856 PPK_Show, // #pragma pack(show), only supported by MSVC. 4857 PPK_Push, // #pragma pack(push, [identifier], [n]) 4858 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4859 }; 4860 4861 enum PragmaMSStructKind { 4862 PMSST_OFF, // #pragms ms_struct off 4863 PMSST_ON // #pragms ms_struct on 4864 }; 4865 4866 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4867 void ActOnPragmaPack(PragmaPackKind Kind, 4868 IdentifierInfo *Name, 4869 Expr *Alignment, 4870 SourceLocation PragmaLoc, 4871 SourceLocation LParenLoc, 4872 SourceLocation RParenLoc); 4873 4874 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 4875 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 4876 4877 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4878 void ActOnPragmaUnused(const Token &Identifier, 4879 Scope *curScope, 4880 SourceLocation PragmaLoc); 4881 4882 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4883 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4884 SourceLocation PragmaLoc); 4885 4886 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4887 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4888 4889 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4890 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4891 SourceLocation PragmaLoc, 4892 SourceLocation WeakNameLoc); 4893 4894 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4895 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4896 IdentifierInfo* AliasName, 4897 SourceLocation PragmaLoc, 4898 SourceLocation WeakNameLoc, 4899 SourceLocation AliasNameLoc); 4900 4901 /// ActOnPragmaFPContract - Called on well formed 4902 /// #pragma {STDC,OPENCL} FP_CONTRACT 4903 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4904 4905 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4906 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4907 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4908 4909 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 4910 void AddMsStructLayoutForRecord(RecordDecl *RD); 4911 4912 /// FreePackedContext - Deallocate and null out PackContext. 4913 void FreePackedContext(); 4914 4915 /// PushNamespaceVisibilityAttr - Note that we've entered a 4916 /// namespace with a visibility attribute. 4917 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4918 4919 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4920 /// add an appropriate visibility attribute. 4921 void AddPushedVisibilityAttribute(Decl *RD); 4922 4923 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4924 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4925 void PopPragmaVisibility(); 4926 4927 /// FreeVisContext - Deallocate and null out VisContext. 4928 void FreeVisContext(); 4929 4930 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4931 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4932 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4933 4934 /// CastCategory - Get the correct forwarded implicit cast result category 4935 /// from the inner expression. 4936 ExprValueKind CastCategory(Expr *E); 4937 4938 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4939 /// cast. If there is already an implicit cast, merge into the existing one. 4940 /// If isLvalue, the result of the cast is an lvalue. 4941 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 4942 ExprValueKind VK = VK_RValue, 4943 const CXXCastPath *BasePath = 0); 4944 4945 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 4946 /// to the conversion from scalar type ScalarTy to the Boolean type. 4947 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 4948 4949 /// IgnoredValueConversions - Given that an expression's result is 4950 /// syntactically ignored, perform any conversions that are 4951 /// required. 4952 ExprResult IgnoredValueConversions(Expr *E); 4953 4954 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4955 // functions and arrays to their respective pointers (C99 6.3.2.1). 4956 ExprResult UsualUnaryConversions(Expr *E); 4957 4958 // DefaultFunctionArrayConversion - converts functions and arrays 4959 // to their respective pointers (C99 6.3.2.1). 4960 ExprResult DefaultFunctionArrayConversion(Expr *E); 4961 4962 // DefaultFunctionArrayLvalueConversion - converts functions and 4963 // arrays to their respective pointers and performs the 4964 // lvalue-to-rvalue conversion. 4965 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 4966 4967 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4968 // the operand. This is DefaultFunctionArrayLvalueConversion, 4969 // except that it assumes the operand isn't of function or array 4970 // type. 4971 ExprResult DefaultLvalueConversion(Expr *E); 4972 4973 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4974 // do not have a prototype. Integer promotions are performed on each 4975 // argument, and arguments that have type float are promoted to double. 4976 ExprResult DefaultArgumentPromotion(Expr *E); 4977 4978 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4979 enum VariadicCallType { 4980 VariadicFunction, 4981 VariadicBlock, 4982 VariadicMethod, 4983 VariadicConstructor, 4984 VariadicDoesNotApply 4985 }; 4986 4987 /// GatherArgumentsForCall - Collector argument expressions for various 4988 /// form of call prototypes. 4989 bool GatherArgumentsForCall(SourceLocation CallLoc, 4990 FunctionDecl *FDecl, 4991 const FunctionProtoType *Proto, 4992 unsigned FirstProtoArg, 4993 Expr **Args, unsigned NumArgs, 4994 llvm::SmallVector<Expr *, 8> &AllArgs, 4995 VariadicCallType CallType = VariadicDoesNotApply); 4996 4997 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4998 // will warn if the resulting type is not a POD type. 4999 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5000 FunctionDecl *FDecl); 5001 5002 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5003 // operands and then handles various conversions that are common to binary 5004 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5005 // routine returns the first non-arithmetic type found. The client is 5006 // responsible for emitting appropriate error diagnostics. 5007 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5008 bool isCompAssign = false); 5009 5010 /// AssignConvertType - All of the 'assignment' semantic checks return this 5011 /// enum to indicate whether the assignment was allowed. These checks are 5012 /// done for simple assignments, as well as initialization, return from 5013 /// function, argument passing, etc. The query is phrased in terms of a 5014 /// source and destination type. 5015 enum AssignConvertType { 5016 /// Compatible - the types are compatible according to the standard. 5017 Compatible, 5018 5019 /// PointerToInt - The assignment converts a pointer to an int, which we 5020 /// accept as an extension. 5021 PointerToInt, 5022 5023 /// IntToPointer - The assignment converts an int to a pointer, which we 5024 /// accept as an extension. 5025 IntToPointer, 5026 5027 /// FunctionVoidPointer - The assignment is between a function pointer and 5028 /// void*, which the standard doesn't allow, but we accept as an extension. 5029 FunctionVoidPointer, 5030 5031 /// IncompatiblePointer - The assignment is between two pointers types that 5032 /// are not compatible, but we accept them as an extension. 5033 IncompatiblePointer, 5034 5035 /// IncompatiblePointer - The assignment is between two pointers types which 5036 /// point to integers which have a different sign, but are otherwise identical. 5037 /// This is a subset of the above, but broken out because it's by far the most 5038 /// common case of incompatible pointers. 5039 IncompatiblePointerSign, 5040 5041 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5042 /// c/v/r qualifiers, which we accept as an extension. 5043 CompatiblePointerDiscardsQualifiers, 5044 5045 /// IncompatiblePointerDiscardsQualifiers - The assignment 5046 /// discards qualifiers that we don't permit to be discarded, 5047 /// like address spaces. 5048 IncompatiblePointerDiscardsQualifiers, 5049 5050 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5051 /// nested pointer types, and the qualifiers other than the first two 5052 /// levels differ e.g. char ** -> const char **, but we accept them as an 5053 /// extension. 5054 IncompatibleNestedPointerQualifiers, 5055 5056 /// IncompatibleVectors - The assignment is between two vector types that 5057 /// have the same size, which we accept as an extension. 5058 IncompatibleVectors, 5059 5060 /// IntToBlockPointer - The assignment converts an int to a block 5061 /// pointer. We disallow this. 5062 IntToBlockPointer, 5063 5064 /// IncompatibleBlockPointer - The assignment is between two block 5065 /// pointers types that are not compatible. 5066 IncompatibleBlockPointer, 5067 5068 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5069 /// id type and something else (that is incompatible with it). For example, 5070 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5071 IncompatibleObjCQualifiedId, 5072 5073 /// Incompatible - We reject this conversion outright, it is invalid to 5074 /// represent it in the AST. 5075 Incompatible 5076 }; 5077 5078 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5079 /// assignment conversion type specified by ConvTy. This returns true if the 5080 /// conversion was invalid or false if the conversion was accepted. 5081 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5082 SourceLocation Loc, 5083 QualType DstType, QualType SrcType, 5084 Expr *SrcExpr, AssignmentAction Action, 5085 bool *Complained = 0); 5086 5087 /// CheckAssignmentConstraints - Perform type checking for assignment, 5088 /// argument passing, variable initialization, and function return values. 5089 /// C99 6.5.16. 5090 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5091 QualType lhs, QualType rhs); 5092 5093 /// Check assignment constraints and prepare for a conversion of the 5094 /// RHS to the LHS type. 5095 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5096 CastKind &Kind); 5097 5098 // CheckSingleAssignmentConstraints - Currently used by 5099 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5100 // this routine performs the default function/array converions. 5101 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5102 ExprResult &rExprRes); 5103 5104 // \brief If the lhs type is a transparent union, check whether we 5105 // can initialize the transparent union with the given expression. 5106 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5107 ExprResult &rExpr); 5108 5109 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5110 5111 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5112 5113 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5114 AssignmentAction Action, 5115 bool AllowExplicit = false); 5116 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5117 AssignmentAction Action, 5118 bool AllowExplicit, 5119 ImplicitConversionSequence& ICS); 5120 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5121 const ImplicitConversionSequence& ICS, 5122 AssignmentAction Action, 5123 bool CStyle = false); 5124 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5125 const StandardConversionSequence& SCS, 5126 AssignmentAction Action, 5127 bool CStyle); 5128 5129 /// the following "Check" methods will return a valid/converted QualType 5130 /// or a null QualType (indicating an error diagnostic was issued). 5131 5132 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5133 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5134 QualType CheckPointerToMemberOperands( // C++ 5.5 5135 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5136 SourceLocation OpLoc, bool isIndirect); 5137 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5138 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5139 bool isDivide); 5140 QualType CheckRemainderOperands( // C99 6.5.5 5141 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5142 QualType CheckAdditionOperands( // C99 6.5.6 5143 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5144 QualType CheckSubtractionOperands( // C99 6.5.6 5145 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5146 QualType CheckShiftOperands( // C99 6.5.7 5147 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5148 bool isCompAssign = false); 5149 QualType CheckCompareOperands( // C99 6.5.8/9 5150 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5151 bool isRelational); 5152 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5153 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5154 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5155 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5156 // CheckAssignmentOperands is used for both simple and compound assignment. 5157 // For simple assignment, pass both expressions and a null converted type. 5158 // For compound assignment, pass both expressions and the converted type. 5159 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5160 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5161 5162 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5163 ExprResult ConvertPropertyForRValue(Expr *E); 5164 5165 QualType CheckConditionalOperands( // C99 6.5.15 5166 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5167 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5168 QualType CXXCheckConditionalOperands( // C++ 5.16 5169 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5170 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5171 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5172 bool *NonStandardCompositeType = 0); 5173 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5174 bool *NonStandardCompositeType = 0) { 5175 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5176 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5177 E1 = Owned(E1Tmp); 5178 E2 = Owned(E2Tmp); 5179 return Composite; 5180 } 5181 5182 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5183 SourceLocation questionLoc); 5184 5185 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5186 SourceLocation QuestionLoc); 5187 5188 /// type checking for vector binary operators. 5189 QualType CheckVectorOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5190 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5191 SourceLocation l, bool isRel); 5192 5193 /// type checking declaration initializers (C99 6.7.8) 5194 bool CheckInitList(const InitializedEntity &Entity, 5195 InitListExpr *&InitList, QualType &DeclType); 5196 bool CheckForConstantInitializer(Expr *e, QualType t); 5197 5198 // type checking C++ declaration initializers (C++ [dcl.init]). 5199 5200 /// ReferenceCompareResult - Expresses the result of comparing two 5201 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5202 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5203 enum ReferenceCompareResult { 5204 /// Ref_Incompatible - The two types are incompatible, so direct 5205 /// reference binding is not possible. 5206 Ref_Incompatible = 0, 5207 /// Ref_Related - The two types are reference-related, which means 5208 /// that their unqualified forms (T1 and T2) are either the same 5209 /// or T1 is a base class of T2. 5210 Ref_Related, 5211 /// Ref_Compatible_With_Added_Qualification - The two types are 5212 /// reference-compatible with added qualification, meaning that 5213 /// they are reference-compatible and the qualifiers on T1 (cv1) 5214 /// are greater than the qualifiers on T2 (cv2). 5215 Ref_Compatible_With_Added_Qualification, 5216 /// Ref_Compatible - The two types are reference-compatible and 5217 /// have equivalent qualifiers (cv1 == cv2). 5218 Ref_Compatible 5219 }; 5220 5221 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5222 QualType T1, QualType T2, 5223 bool &DerivedToBase, 5224 bool &ObjCConversion); 5225 5226 /// CheckCastTypes - Check type constraints for casting between types under 5227 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5228 ExprResult CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *CastExpr, 5229 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 5230 bool FunctionalStyle = false); 5231 5232 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5233 Expr *castExpr, CastKind &castKind, 5234 ExprValueKind &valueKind, CXXCastPath &BasePath); 5235 5236 // CheckVectorCast - check type constraints for vectors. 5237 // Since vectors are an extension, there are no C standard reference for this. 5238 // We allow casting between vectors and integer datatypes of the same size. 5239 // returns true if the cast is invalid 5240 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5241 CastKind &Kind); 5242 5243 // CheckExtVectorCast - check type constraints for extended vectors. 5244 // Since vectors are an extension, there are no C standard reference for this. 5245 // We allow casting between vectors and integer datatypes of the same size, 5246 // or vectors and the element type of that vector. 5247 // returns the cast expr 5248 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5249 CastKind &Kind); 5250 5251 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5252 /// cast under C++ semantics. 5253 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5254 Expr *CastExpr, CastKind &Kind, 5255 CXXCastPath &BasePath, bool FunctionalStyle); 5256 5257 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5258 /// \param Method - May be null. 5259 /// \param [out] ReturnType - The return type of the send. 5260 /// \return true iff there were any incompatible types. 5261 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5262 ObjCMethodDecl *Method, bool isClassMessage, 5263 SourceLocation lbrac, SourceLocation rbrac, 5264 QualType &ReturnType, ExprValueKind &VK); 5265 5266 /// CheckBooleanCondition - Diagnose problems involving the use of 5267 /// the given expression as a boolean condition (e.g. in an if 5268 /// statement). Also performs the standard function and array 5269 /// decays, possibly changing the input variable. 5270 /// 5271 /// \param Loc - A location associated with the condition, e.g. the 5272 /// 'if' keyword. 5273 /// \return true iff there were any errors 5274 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5275 5276 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5277 Expr *SubExpr); 5278 5279 /// DiagnoseAssignmentAsCondition - Given that an expression is 5280 /// being used as a boolean condition, warn if it's an assignment. 5281 void DiagnoseAssignmentAsCondition(Expr *E); 5282 5283 /// \brief Redundant parentheses over an equality comparison can indicate 5284 /// that the user intended an assignment used as condition. 5285 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5286 5287 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5288 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5289 5290 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5291 /// the specified width and sign. If an overflow occurs, detect it and emit 5292 /// the specified diagnostic. 5293 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5294 unsigned NewWidth, bool NewSign, 5295 SourceLocation Loc, unsigned DiagID); 5296 5297 /// Checks that the Objective-C declaration is declared in the global scope. 5298 /// Emits an error and marks the declaration as invalid if it's not declared 5299 /// in the global scope. 5300 bool CheckObjCDeclScope(Decl *D); 5301 5302 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5303 /// and reports the appropriate diagnostics. Returns false on success. 5304 /// Can optionally return the value of the expression. 5305 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5306 5307 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5308 /// the correct width, and that the field type is valid. 5309 /// Returns false on success. 5310 /// Can optionally return whether the bit-field is of width 0 5311 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5312 QualType FieldTy, const Expr *BitWidth, 5313 bool *ZeroWidth = 0); 5314 5315 /// \name Code completion 5316 //@{ 5317 /// \brief Describes the context in which code completion occurs. 5318 enum ParserCompletionContext { 5319 /// \brief Code completion occurs at top-level or namespace context. 5320 PCC_Namespace, 5321 /// \brief Code completion occurs within a class, struct, or union. 5322 PCC_Class, 5323 /// \brief Code completion occurs within an Objective-C interface, protocol, 5324 /// or category. 5325 PCC_ObjCInterface, 5326 /// \brief Code completion occurs within an Objective-C implementation or 5327 /// category implementation 5328 PCC_ObjCImplementation, 5329 /// \brief Code completion occurs within the list of instance variables 5330 /// in an Objective-C interface, protocol, category, or implementation. 5331 PCC_ObjCInstanceVariableList, 5332 /// \brief Code completion occurs following one or more template 5333 /// headers. 5334 PCC_Template, 5335 /// \brief Code completion occurs following one or more template 5336 /// headers within a class. 5337 PCC_MemberTemplate, 5338 /// \brief Code completion occurs within an expression. 5339 PCC_Expression, 5340 /// \brief Code completion occurs within a statement, which may 5341 /// also be an expression or a declaration. 5342 PCC_Statement, 5343 /// \brief Code completion occurs at the beginning of the 5344 /// initialization statement (or expression) in a for loop. 5345 PCC_ForInit, 5346 /// \brief Code completion occurs within the condition of an if, 5347 /// while, switch, or for statement. 5348 PCC_Condition, 5349 /// \brief Code completion occurs within the body of a function on a 5350 /// recovery path, where we do not have a specific handle on our position 5351 /// in the grammar. 5352 PCC_RecoveryInFunction, 5353 /// \brief Code completion occurs where only a type is permitted. 5354 PCC_Type, 5355 /// \brief Code completion occurs in a parenthesized expression, which 5356 /// might also be a type cast. 5357 PCC_ParenthesizedExpression, 5358 /// \brief Code completion occurs within a sequence of declaration 5359 /// specifiers within a function, method, or block. 5360 PCC_LocalDeclarationSpecifiers 5361 }; 5362 5363 void CodeCompleteOrdinaryName(Scope *S, 5364 ParserCompletionContext CompletionContext); 5365 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5366 bool AllowNonIdentifiers, 5367 bool AllowNestedNameSpecifiers); 5368 5369 struct CodeCompleteExpressionData; 5370 void CodeCompleteExpression(Scope *S, 5371 const CodeCompleteExpressionData &Data); 5372 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5373 SourceLocation OpLoc, 5374 bool IsArrow); 5375 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5376 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5377 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5378 void CodeCompleteCase(Scope *S); 5379 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5380 void CodeCompleteInitializer(Scope *S, Decl *D); 5381 void CodeCompleteReturn(Scope *S); 5382 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5383 5384 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5385 bool EnteringContext); 5386 void CodeCompleteUsing(Scope *S); 5387 void CodeCompleteUsingDirective(Scope *S); 5388 void CodeCompleteNamespaceDecl(Scope *S); 5389 void CodeCompleteNamespaceAliasDecl(Scope *S); 5390 void CodeCompleteOperatorName(Scope *S); 5391 void CodeCompleteConstructorInitializer(Decl *Constructor, 5392 CXXCtorInitializer** Initializers, 5393 unsigned NumInitializers); 5394 5395 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5396 bool InInterface); 5397 void CodeCompleteObjCAtVisibility(Scope *S); 5398 void CodeCompleteObjCAtStatement(Scope *S); 5399 void CodeCompleteObjCAtExpression(Scope *S); 5400 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5401 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5402 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5403 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5404 bool IsParameter); 5405 void CodeCompleteObjCMessageReceiver(Scope *S); 5406 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5407 IdentifierInfo **SelIdents, 5408 unsigned NumSelIdents, 5409 bool AtArgumentExpression); 5410 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5411 IdentifierInfo **SelIdents, 5412 unsigned NumSelIdents, 5413 bool AtArgumentExpression, 5414 bool IsSuper = false); 5415 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5416 IdentifierInfo **SelIdents, 5417 unsigned NumSelIdents, 5418 bool AtArgumentExpression, 5419 ObjCInterfaceDecl *Super = 0); 5420 void CodeCompleteObjCForCollection(Scope *S, 5421 DeclGroupPtrTy IterationVar); 5422 void CodeCompleteObjCSelector(Scope *S, 5423 IdentifierInfo **SelIdents, 5424 unsigned NumSelIdents); 5425 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5426 unsigned NumProtocols); 5427 void CodeCompleteObjCProtocolDecl(Scope *S); 5428 void CodeCompleteObjCInterfaceDecl(Scope *S); 5429 void CodeCompleteObjCSuperclass(Scope *S, 5430 IdentifierInfo *ClassName, 5431 SourceLocation ClassNameLoc); 5432 void CodeCompleteObjCImplementationDecl(Scope *S); 5433 void CodeCompleteObjCInterfaceCategory(Scope *S, 5434 IdentifierInfo *ClassName, 5435 SourceLocation ClassNameLoc); 5436 void CodeCompleteObjCImplementationCategory(Scope *S, 5437 IdentifierInfo *ClassName, 5438 SourceLocation ClassNameLoc); 5439 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5440 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5441 IdentifierInfo *PropertyName, 5442 Decl *ObjCImpDecl); 5443 void CodeCompleteObjCMethodDecl(Scope *S, 5444 bool IsInstanceMethod, 5445 ParsedType ReturnType, 5446 Decl *IDecl); 5447 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5448 bool IsInstanceMethod, 5449 bool AtParameterName, 5450 ParsedType ReturnType, 5451 IdentifierInfo **SelIdents, 5452 unsigned NumSelIdents); 5453 void CodeCompletePreprocessorDirective(bool InConditional); 5454 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5455 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5456 void CodeCompletePreprocessorExpression(); 5457 void CodeCompletePreprocessorMacroArgument(Scope *S, 5458 IdentifierInfo *Macro, 5459 MacroInfo *MacroInfo, 5460 unsigned Argument); 5461 void CodeCompleteNaturalLanguage(); 5462 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5463 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5464 //@} 5465 5466 void PrintStats() const {} 5467 5468 //===--------------------------------------------------------------------===// 5469 // Extra semantic analysis beyond the C type system 5470 5471public: 5472 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5473 unsigned ByteNo) const; 5474 5475private: 5476 void CheckArrayAccess(const Expr *E); 5477 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5478 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5479 5480 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5481 bool CheckObjCString(Expr *Arg); 5482 5483 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5484 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5485 5486 bool SemaBuiltinVAStart(CallExpr *TheCall); 5487 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5488 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5489 5490public: 5491 // Used by C++ template instantiation. 5492 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5493 5494private: 5495 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5496 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5497 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5498 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5499 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5500 llvm::APSInt &Result); 5501 5502 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5503 bool HasVAListArg, unsigned format_idx, 5504 unsigned firstDataArg, bool isPrintf); 5505 5506 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5507 const CallExpr *TheCall, bool HasVAListArg, 5508 unsigned format_idx, unsigned firstDataArg, 5509 bool isPrintf); 5510 5511 void CheckNonNullArguments(const NonNullAttr *NonNull, 5512 const Expr * const *ExprArgs, 5513 SourceLocation CallSiteLoc); 5514 5515 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5516 unsigned format_idx, unsigned firstDataArg, 5517 bool isPrintf); 5518 5519 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5520 SourceLocation ReturnLoc); 5521 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5522 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5523 5524 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5525 Expr *Init); 5526 5527 /// \brief The parser's current scope. 5528 /// 5529 /// The parser maintains this state here. 5530 Scope *CurScope; 5531 5532protected: 5533 friend class Parser; 5534 friend class InitializationSequence; 5535 5536 /// \brief Retrieve the parser's current scope. 5537 Scope *getCurScope() const { return CurScope; } 5538}; 5539 5540/// \brief RAII object that enters a new expression evaluation context. 5541class EnterExpressionEvaluationContext { 5542 Sema &Actions; 5543 5544public: 5545 EnterExpressionEvaluationContext(Sema &Actions, 5546 Sema::ExpressionEvaluationContext NewContext) 5547 : Actions(Actions) { 5548 Actions.PushExpressionEvaluationContext(NewContext); 5549 } 5550 5551 ~EnterExpressionEvaluationContext() { 5552 Actions.PopExpressionEvaluationContext(); 5553 } 5554}; 5555 5556} // end namespace clang 5557 5558#endif 5559