Sema.h revision acba90f30876b4140b738f0d3dd0e50724053a96
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "llvm/ADT/OwningPtr.h" 31#include "llvm/ADT/SmallPtrSet.h" 32#include "llvm/ADT/SmallVector.h" 33#include <deque> 34#include <string> 35 36namespace llvm { 37 class APSInt; 38 template <typename ValueT> struct DenseMapInfo; 39 template <typename ValueT, typename ValueInfoT> class DenseSet; 40} 41 42namespace clang { 43 class ADLResult; 44 class ASTConsumer; 45 class ASTContext; 46 class ArrayType; 47 class AttributeList; 48 class BlockDecl; 49 class CXXBasePath; 50 class CXXBasePaths; 51 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 52 class CXXConstructorDecl; 53 class CXXConversionDecl; 54 class CXXDestructorDecl; 55 class CXXFieldCollector; 56 class CXXMemberCallExpr; 57 class CXXMethodDecl; 58 class CXXScopeSpec; 59 class CXXTemporary; 60 class CXXTryStmt; 61 class CallExpr; 62 class ClassTemplateDecl; 63 class ClassTemplatePartialSpecializationDecl; 64 class ClassTemplateSpecializationDecl; 65 class CodeCompleteConsumer; 66 class CodeCompletionAllocator; 67 class CodeCompletionResult; 68 class Decl; 69 class DeclAccessPair; 70 class DeclContext; 71 class DeclRefExpr; 72 class DeclaratorDecl; 73 class DeducedTemplateArgument; 74 class DependentDiagnostic; 75 class DesignatedInitExpr; 76 class Designation; 77 class EnumConstantDecl; 78 class Expr; 79 class ExtVectorType; 80 class ExternalSemaSource; 81 class FormatAttr; 82 class FriendDecl; 83 class FunctionDecl; 84 class FunctionProtoType; 85 class FunctionTemplateDecl; 86 class ImplicitConversionSequence; 87 class InitListExpr; 88 class InitializationKind; 89 class InitializationSequence; 90 class InitializedEntity; 91 class IntegerLiteral; 92 class LabelStmt; 93 class LangOptions; 94 class LocalInstantiationScope; 95 class LookupResult; 96 class MacroInfo; 97 class MultiLevelTemplateArgumentList; 98 class NamedDecl; 99 class NonNullAttr; 100 class ObjCCategoryDecl; 101 class ObjCCategoryImplDecl; 102 class ObjCCompatibleAliasDecl; 103 class ObjCContainerDecl; 104 class ObjCImplDecl; 105 class ObjCImplementationDecl; 106 class ObjCInterfaceDecl; 107 class ObjCIvarDecl; 108 template <class T> class ObjCList; 109 class ObjCMethodDecl; 110 class ObjCPropertyDecl; 111 class ObjCProtocolDecl; 112 class OverloadCandidateSet; 113 class ParenListExpr; 114 class ParmVarDecl; 115 class Preprocessor; 116 class PseudoDestructorTypeStorage; 117 class QualType; 118 class StandardConversionSequence; 119 class Stmt; 120 class StringLiteral; 121 class SwitchStmt; 122 class TargetAttributesSema; 123 class TemplateArgument; 124 class TemplateArgumentList; 125 class TemplateArgumentLoc; 126 class TemplateDecl; 127 class TemplateParameterList; 128 class TemplatePartialOrderingContext; 129 class TemplateTemplateParmDecl; 130 class Token; 131 class TypedefDecl; 132 class TypeLoc; 133 class UnqualifiedId; 134 class UnresolvedLookupExpr; 135 class UnresolvedMemberExpr; 136 class UnresolvedSetImpl; 137 class UnresolvedSetIterator; 138 class UsingDecl; 139 class UsingShadowDecl; 140 class ValueDecl; 141 class VarDecl; 142 class VisibilityAttr; 143 class VisibleDeclConsumer; 144 class IndirectFieldDecl; 145 146namespace sema { 147 class AccessedEntity; 148 class BlockScopeInfo; 149 class DelayedDiagnostic; 150 class FunctionScopeInfo; 151 class TemplateDeductionInfo; 152} 153 154/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 155/// parsing. 156/// 157/// LocInfoType is a "transient" type, only needed for passing to/from Parser 158/// and Sema, when we want to preserve type source info for a parsed type. 159/// It will not participate in the type system semantics in any way. 160class LocInfoType : public Type { 161 enum { 162 // The last number that can fit in Type's TC. 163 // Avoids conflict with an existing Type class. 164 LocInfo = Type::TypeLast + 1 165 }; 166 167 TypeSourceInfo *DeclInfo; 168 169 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 170 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 171 ty->isVariablyModifiedType(), 172 ty->containsUnexpandedParameterPack()), 173 DeclInfo(TInfo) { 174 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 175 } 176 friend class Sema; 177 178public: 179 QualType getType() const { return getCanonicalTypeInternal(); } 180 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 181 182 void getAsStringInternal(std::string &Str, 183 const PrintingPolicy &Policy) const; 184 185 static bool classof(const Type *T) { 186 return T->getTypeClass() == (TypeClass)LocInfo; 187 } 188 static bool classof(const LocInfoType *) { return true; } 189}; 190 191// FIXME: No way to easily map from TemplateTypeParmTypes to 192// TemplateTypeParmDecls, so we have this horrible PointerUnion. 193typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 194 SourceLocation> UnexpandedParameterPack; 195 196/// Sema - This implements semantic analysis and AST building for C. 197class Sema { 198 Sema(const Sema&); // DO NOT IMPLEMENT 199 void operator=(const Sema&); // DO NOT IMPLEMENT 200 mutable const TargetAttributesSema* TheTargetAttributesSema; 201public: 202 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 203 typedef OpaquePtr<TemplateName> TemplateTy; 204 typedef OpaquePtr<QualType> TypeTy; 205 typedef Attr AttrTy; 206 typedef CXXBaseSpecifier BaseTy; 207 typedef CXXCtorInitializer MemInitTy; 208 typedef Expr ExprTy; 209 typedef Stmt StmtTy; 210 typedef TemplateParameterList TemplateParamsTy; 211 typedef NestedNameSpecifier CXXScopeTy; 212 213 OpenCLOptions OpenCLFeatures; 214 FPOptions FPFeatures; 215 216 const LangOptions &LangOpts; 217 Preprocessor &PP; 218 ASTContext &Context; 219 ASTConsumer &Consumer; 220 Diagnostic &Diags; 221 SourceManager &SourceMgr; 222 223 /// \brief Source of additional semantic information. 224 ExternalSemaSource *ExternalSource; 225 226 /// \brief Code-completion consumer. 227 CodeCompleteConsumer *CodeCompleter; 228 229 /// CurContext - This is the current declaration context of parsing. 230 DeclContext *CurContext; 231 232 /// VAListTagName - The declaration name corresponding to __va_list_tag. 233 /// This is used as part of a hack to omit that class from ADL results. 234 DeclarationName VAListTagName; 235 236 /// PackContext - Manages the stack for #pragma pack. An alignment 237 /// of 0 indicates default alignment. 238 void *PackContext; // Really a "PragmaPackStack*" 239 240 /// VisContext - Manages the stack for #pragma GCC visibility. 241 void *VisContext; // Really a "PragmaVisStack*" 242 243 /// \brief Stack containing information about each of the nested 244 /// function, block, and method scopes that are currently active. 245 /// 246 /// This array is never empty. Clients should ignore the first 247 /// element, which is used to cache a single FunctionScopeInfo 248 /// that's used to parse every top-level function. 249 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 250 251 /// ExprTemporaries - This is the stack of temporaries that are created by 252 /// the current full expression. 253 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 254 255 /// ExtVectorDecls - This is a list all the extended vector types. This allows 256 /// us to associate a raw vector type with one of the ext_vector type names. 257 /// This is only necessary for issuing pretty diagnostics. 258 llvm::SmallVector<TypedefDecl*, 24> ExtVectorDecls; 259 260 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 261 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 262 263 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 264 265 /// PureVirtualClassDiagSet - a set of class declarations which we have 266 /// emitted a list of pure virtual functions. Used to prevent emitting the 267 /// same list more than once. 268 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 269 270 /// ParsingInitForAutoVars - a set of declarations with auto types for which 271 /// we are currently parsing the initializer. 272 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 273 274 /// \brief A mapping from external names to the most recent 275 /// locally-scoped external declaration with that name. 276 /// 277 /// This map contains external declarations introduced in local 278 /// scoped, e.g., 279 /// 280 /// \code 281 /// void f() { 282 /// void foo(int, int); 283 /// } 284 /// \endcode 285 /// 286 /// Here, the name "foo" will be associated with the declaration on 287 /// "foo" within f. This name is not visible outside of 288 /// "f". However, we still find it in two cases: 289 /// 290 /// - If we are declaring another external with the name "foo", we 291 /// can find "foo" as a previous declaration, so that the types 292 /// of this external declaration can be checked for 293 /// compatibility. 294 /// 295 /// - If we would implicitly declare "foo" (e.g., due to a call to 296 /// "foo" in C when no prototype or definition is visible), then 297 /// we find this declaration of "foo" and complain that it is 298 /// not visible. 299 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 300 301 /// \brief All the tentative definitions encountered in the TU. 302 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 303 304 /// \brief The set of file scoped decls seen so far that have not been used 305 /// and must warn if not used. Only contains the first declaration. 306 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 307 308 class DelayedDiagnostics; 309 310 class ParsingDeclState { 311 unsigned SavedStackSize; 312 friend class Sema::DelayedDiagnostics; 313 }; 314 315 class ProcessingContextState { 316 unsigned SavedParsingDepth; 317 unsigned SavedActiveStackBase; 318 friend class Sema::DelayedDiagnostics; 319 }; 320 321 /// A class which encapsulates the logic for delaying diagnostics 322 /// during parsing and other processing. 323 class DelayedDiagnostics { 324 /// \brief The stack of diagnostics that were delayed due to being 325 /// produced during the parsing of a declaration. 326 sema::DelayedDiagnostic *Stack; 327 328 /// \brief The number of objects on the delayed-diagnostics stack. 329 unsigned StackSize; 330 331 /// \brief The current capacity of the delayed-diagnostics stack. 332 unsigned StackCapacity; 333 334 /// \brief The index of the first "active" delayed diagnostic in 335 /// the stack. When parsing class definitions, we ignore active 336 /// delayed diagnostics from the surrounding context. 337 unsigned ActiveStackBase; 338 339 /// \brief The depth of the declarations we're currently parsing. 340 /// This gets saved and reset whenever we enter a class definition. 341 unsigned ParsingDepth; 342 343 public: 344 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 345 ActiveStackBase(0), ParsingDepth(0) {} 346 347 ~DelayedDiagnostics() { 348 delete[] reinterpret_cast<char*>(Stack); 349 } 350 351 /// Adds a delayed diagnostic. 352 void add(const sema::DelayedDiagnostic &diag); 353 354 /// Determines whether diagnostics should be delayed. 355 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 356 357 /// Observe that we've started parsing a declaration. Access and 358 /// deprecation diagnostics will be delayed; when the declaration 359 /// is completed, all active delayed diagnostics will be evaluated 360 /// in its context, and then active diagnostics stack will be 361 /// popped down to the saved depth. 362 ParsingDeclState pushParsingDecl() { 363 ParsingDepth++; 364 365 ParsingDeclState state; 366 state.SavedStackSize = StackSize; 367 return state; 368 } 369 370 /// Observe that we're completed parsing a declaration. 371 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 372 373 /// Observe that we've started processing a different context, the 374 /// contents of which are semantically separate from the 375 /// declarations it may lexically appear in. This sets aside the 376 /// current stack of active diagnostics and starts afresh. 377 ProcessingContextState pushContext() { 378 assert(StackSize >= ActiveStackBase); 379 380 ProcessingContextState state; 381 state.SavedParsingDepth = ParsingDepth; 382 state.SavedActiveStackBase = ActiveStackBase; 383 384 ActiveStackBase = StackSize; 385 ParsingDepth = 0; 386 387 return state; 388 } 389 390 /// Observe that we've stopped processing a context. This 391 /// restores the previous stack of active diagnostics. 392 void popContext(ProcessingContextState state) { 393 assert(ActiveStackBase == StackSize); 394 assert(ParsingDepth == 0); 395 ActiveStackBase = state.SavedActiveStackBase; 396 ParsingDepth = state.SavedParsingDepth; 397 } 398 } DelayedDiagnostics; 399 400 /// A RAII object to temporarily push a declaration context. 401 class ContextRAII { 402 private: 403 Sema &S; 404 DeclContext *SavedContext; 405 ProcessingContextState SavedContextState; 406 407 public: 408 ContextRAII(Sema &S, DeclContext *ContextToPush) 409 : S(S), SavedContext(S.CurContext), 410 SavedContextState(S.DelayedDiagnostics.pushContext()) 411 { 412 assert(ContextToPush && "pushing null context"); 413 S.CurContext = ContextToPush; 414 } 415 416 void pop() { 417 if (!SavedContext) return; 418 S.CurContext = SavedContext; 419 S.DelayedDiagnostics.popContext(SavedContextState); 420 SavedContext = 0; 421 } 422 423 ~ContextRAII() { 424 pop(); 425 } 426 }; 427 428 /// WeakUndeclaredIdentifiers - Identifiers contained in 429 /// #pragma weak before declared. rare. may alias another 430 /// identifier, declared or undeclared 431 class WeakInfo { 432 IdentifierInfo *alias; // alias (optional) 433 SourceLocation loc; // for diagnostics 434 bool used; // identifier later declared? 435 public: 436 WeakInfo() 437 : alias(0), loc(SourceLocation()), used(false) {} 438 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 439 : alias(Alias), loc(Loc), used(false) {} 440 inline IdentifierInfo * getAlias() const { return alias; } 441 inline SourceLocation getLocation() const { return loc; } 442 void setUsed(bool Used=true) { used = Used; } 443 inline bool getUsed() { return used; } 444 bool operator==(WeakInfo RHS) const { 445 return alias == RHS.getAlias() && loc == RHS.getLocation(); 446 } 447 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 448 }; 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 452 /// #pragma weak during processing of other Decls. 453 /// I couldn't figure out a clean way to generate these in-line, so 454 /// we store them here and handle separately -- which is a hack. 455 /// It would be best to refactor this. 456 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 457 458 IdentifierResolver IdResolver; 459 460 /// Translation Unit Scope - useful to Objective-C actions that need 461 /// to lookup file scope declarations in the "ordinary" C decl namespace. 462 /// For example, user-defined classes, built-in "id" type, etc. 463 Scope *TUScope; 464 465 /// \brief The C++ "std" namespace, where the standard library resides. 466 LazyDeclPtr StdNamespace; 467 468 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 469 /// standard library. 470 LazyDeclPtr StdBadAlloc; 471 472 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 473 RecordDecl *CXXTypeInfoDecl; 474 475 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 476 RecordDecl *MSVCGuidDecl; 477 478 /// A flag to remember whether the implicit forms of operator new and delete 479 /// have been declared. 480 bool GlobalNewDeleteDeclared; 481 482 /// \brief The set of declarations that have been referenced within 483 /// a potentially evaluated expression. 484 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 485 PotentiallyReferencedDecls; 486 487 /// \brief A set of diagnostics that may be emitted. 488 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 489 PotentiallyEmittedDiagnostics; 490 491 /// \brief Describes how the expressions currently being parsed are 492 /// evaluated at run-time, if at all. 493 enum ExpressionEvaluationContext { 494 /// \brief The current expression and its subexpressions occur within an 495 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 496 /// or the subexpression of \c sizeof, where the type or the value of the 497 /// expression may be significant but no code will be generated to evaluate 498 /// the value of the expression at run time. 499 Unevaluated, 500 501 /// \brief The current expression is potentially evaluated at run time, 502 /// which means that code may be generated to evaluate the value of the 503 /// expression at run time. 504 PotentiallyEvaluated, 505 506 /// \brief The current expression may be potentially evaluated or it may 507 /// be unevaluated, but it is impossible to tell from the lexical context. 508 /// This evaluation context is used primary for the operand of the C++ 509 /// \c typeid expression, whose argument is potentially evaluated only when 510 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 511 PotentiallyPotentiallyEvaluated, 512 513 /// \brief The current expression is potentially evaluated, but any 514 /// declarations referenced inside that expression are only used if 515 /// in fact the current expression is used. 516 /// 517 /// This value is used when parsing default function arguments, for which 518 /// we would like to provide diagnostics (e.g., passing non-POD arguments 519 /// through varargs) but do not want to mark declarations as "referenced" 520 /// until the default argument is used. 521 PotentiallyEvaluatedIfUsed 522 }; 523 524 /// \brief Data structure used to record current or nested 525 /// expression evaluation contexts. 526 struct ExpressionEvaluationContextRecord { 527 /// \brief The expression evaluation context. 528 ExpressionEvaluationContext Context; 529 530 /// \brief The number of temporaries that were active when we 531 /// entered this expression evaluation context. 532 unsigned NumTemporaries; 533 534 /// \brief The set of declarations referenced within a 535 /// potentially potentially-evaluated context. 536 /// 537 /// When leaving a potentially potentially-evaluated context, each 538 /// of these elements will be as referenced if the corresponding 539 /// potentially potentially evaluated expression is potentially 540 /// evaluated. 541 PotentiallyReferencedDecls *PotentiallyReferenced; 542 543 /// \brief The set of diagnostics to emit should this potentially 544 /// potentially-evaluated context become evaluated. 545 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 546 547 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 548 unsigned NumTemporaries) 549 : Context(Context), NumTemporaries(NumTemporaries), 550 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 551 552 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 553 if (!PotentiallyReferenced) 554 PotentiallyReferenced = new PotentiallyReferencedDecls; 555 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 556 } 557 558 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 559 if (!PotentiallyDiagnosed) 560 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 561 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 562 } 563 564 void Destroy() { 565 delete PotentiallyReferenced; 566 delete PotentiallyDiagnosed; 567 PotentiallyReferenced = 0; 568 PotentiallyDiagnosed = 0; 569 } 570 }; 571 572 /// A stack of expression evaluation contexts. 573 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 574 575 /// \brief Whether the code handled by Sema should be considered a 576 /// complete translation unit or not. 577 /// 578 /// When true (which is generally the case), Sema will perform 579 /// end-of-translation-unit semantic tasks (such as creating 580 /// initializers for tentative definitions in C) once parsing has 581 /// completed. This flag will be false when building PCH files, 582 /// since a PCH file is by definition not a complete translation 583 /// unit. 584 bool CompleteTranslationUnit; 585 586 llvm::BumpPtrAllocator BumpAlloc; 587 588 /// \brief The number of SFINAE diagnostics that have been trapped. 589 unsigned NumSFINAEErrors; 590 591 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 592 UnparsedDefaultArgInstantiationsMap; 593 594 /// \brief A mapping from parameters with unparsed default arguments to the 595 /// set of instantiations of each parameter. 596 /// 597 /// This mapping is a temporary data structure used when parsing 598 /// nested class templates or nested classes of class templates, 599 /// where we might end up instantiating an inner class before the 600 /// default arguments of its methods have been parsed. 601 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 602 603 // Contains the locations of the beginning of unparsed default 604 // argument locations. 605 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 606 607 /// UndefinedInternals - all the used, undefined objects with 608 /// internal linkage in this translation unit. 609 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 610 611 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 612 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 613 614 /// Method Pool - allows efficient lookup when typechecking messages to "id". 615 /// We need to maintain a list, since selectors can have differing signatures 616 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 617 /// of selectors are "overloaded"). 618 GlobalMethodPool MethodPool; 619 620 /// Method selectors used in a @selector expression. Used for implementation 621 /// of -Wselector. 622 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 623 624 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 625 626 /// Private Helper predicate to check for 'self'. 627 bool isSelfExpr(Expr *RExpr); 628public: 629 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 630 bool CompleteTranslationUnit = true, 631 CodeCompleteConsumer *CompletionConsumer = 0); 632 ~Sema(); 633 634 /// \brief Perform initialization that occurs after the parser has been 635 /// initialized but before it parses anything. 636 void Initialize(); 637 638 const LangOptions &getLangOptions() const { return LangOpts; } 639 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 640 FPOptions &getFPOptions() { return FPFeatures; } 641 642 Diagnostic &getDiagnostics() const { return Diags; } 643 SourceManager &getSourceManager() const { return SourceMgr; } 644 const TargetAttributesSema &getTargetAttributesSema() const; 645 Preprocessor &getPreprocessor() const { return PP; } 646 ASTContext &getASTContext() const { return Context; } 647 ASTConsumer &getASTConsumer() const { return Consumer; } 648 649 /// \brief Helper class that creates diagnostics with optional 650 /// template instantiation stacks. 651 /// 652 /// This class provides a wrapper around the basic DiagnosticBuilder 653 /// class that emits diagnostics. SemaDiagnosticBuilder is 654 /// responsible for emitting the diagnostic (as DiagnosticBuilder 655 /// does) and, if the diagnostic comes from inside a template 656 /// instantiation, printing the template instantiation stack as 657 /// well. 658 class SemaDiagnosticBuilder : public DiagnosticBuilder { 659 Sema &SemaRef; 660 unsigned DiagID; 661 662 public: 663 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 664 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 665 666 explicit SemaDiagnosticBuilder(Sema &SemaRef) 667 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 668 669 ~SemaDiagnosticBuilder(); 670 }; 671 672 /// \brief Emit a diagnostic. 673 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 674 675 /// \brief Emit a partial diagnostic. 676 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 677 678 /// \brief Build a partial diagnostic. 679 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 680 681 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 682 683 ExprResult Owned(Expr* E) { return E; } 684 ExprResult Owned(ExprResult R) { return R; } 685 StmtResult Owned(Stmt* S) { return S; } 686 687 void ActOnEndOfTranslationUnit(); 688 689 Scope *getScopeForContext(DeclContext *Ctx); 690 691 void PushFunctionScope(); 692 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 693 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 694 const Decl *D = 0, const BlockExpr *blkExpr = 0); 695 696 sema::FunctionScopeInfo *getCurFunction() const { 697 return FunctionScopes.back(); 698 } 699 700 bool hasAnyErrorsInThisFunction() const; 701 702 /// \brief Retrieve the current block, if any. 703 sema::BlockScopeInfo *getCurBlock(); 704 705 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 706 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 707 708 //===--------------------------------------------------------------------===// 709 // Type Analysis / Processing: SemaType.cpp. 710 // 711 712 QualType adjustParameterType(QualType T); 713 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 714 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 715 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 716 } 717 QualType BuildPointerType(QualType T, 718 SourceLocation Loc, DeclarationName Entity); 719 QualType BuildReferenceType(QualType T, bool LValueRef, 720 SourceLocation Loc, DeclarationName Entity); 721 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 722 Expr *ArraySize, unsigned Quals, 723 SourceRange Brackets, DeclarationName Entity); 724 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 725 SourceLocation AttrLoc); 726 QualType BuildFunctionType(QualType T, 727 QualType *ParamTypes, unsigned NumParamTypes, 728 bool Variadic, unsigned Quals, 729 RefQualifierKind RefQualifier, 730 SourceLocation Loc, DeclarationName Entity, 731 FunctionType::ExtInfo Info); 732 QualType BuildMemberPointerType(QualType T, QualType Class, 733 SourceLocation Loc, 734 DeclarationName Entity); 735 QualType BuildBlockPointerType(QualType T, 736 SourceLocation Loc, DeclarationName Entity); 737 QualType BuildParenType(QualType T); 738 739 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 740 TagDecl **OwnedDecl = 0, 741 bool AllowAutoInTypeName = false); 742 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 743 TypeSourceInfo *ReturnTypeInfo); 744 /// \brief Package the given type and TSI into a ParsedType. 745 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 746 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 747 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 748 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 749 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 750 bool CheckDistantExceptionSpec(QualType T); 751 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 752 bool CheckEquivalentExceptionSpec( 753 const FunctionProtoType *Old, SourceLocation OldLoc, 754 const FunctionProtoType *New, SourceLocation NewLoc); 755 bool CheckEquivalentExceptionSpec( 756 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 757 const FunctionProtoType *Old, SourceLocation OldLoc, 758 const FunctionProtoType *New, SourceLocation NewLoc, 759 bool *MissingExceptionSpecification = 0, 760 bool *MissingEmptyExceptionSpecification = 0); 761 bool CheckExceptionSpecSubset( 762 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 763 const FunctionProtoType *Superset, SourceLocation SuperLoc, 764 const FunctionProtoType *Subset, SourceLocation SubLoc); 765 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 766 const FunctionProtoType *Target, SourceLocation TargetLoc, 767 const FunctionProtoType *Source, SourceLocation SourceLoc); 768 769 TypeResult ActOnTypeName(Scope *S, Declarator &D); 770 771 bool RequireCompleteType(SourceLocation Loc, QualType T, 772 const PartialDiagnostic &PD, 773 std::pair<SourceLocation, PartialDiagnostic> Note); 774 bool RequireCompleteType(SourceLocation Loc, QualType T, 775 const PartialDiagnostic &PD); 776 bool RequireCompleteType(SourceLocation Loc, QualType T, 777 unsigned DiagID); 778 779 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 780 const CXXScopeSpec &SS, QualType T); 781 782 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 783 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 784 785 //===--------------------------------------------------------------------===// 786 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 787 // 788 789 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 790 791 void DiagnoseUseOfUnimplementedSelectors(); 792 793 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 794 Scope *S, CXXScopeSpec *SS = 0, 795 bool isClassName = false, 796 bool HasTrailingDot = false, 797 ParsedType ObjectType = ParsedType(), 798 bool WantNontrivialTypeSourceInfo = false); 799 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 800 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 801 SourceLocation IILoc, 802 Scope *S, 803 CXXScopeSpec *SS, 804 ParsedType &SuggestedType); 805 806 Decl *ActOnDeclarator(Scope *S, Declarator &D); 807 808 Decl *HandleDeclarator(Scope *S, Declarator &D, 809 MultiTemplateParamsArg TemplateParameterLists, 810 bool IsFunctionDefinition); 811 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 812 const LookupResult &Previous, 813 Scope *S); 814 void DiagnoseFunctionSpecifiers(Declarator& D); 815 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 816 void CheckShadow(Scope *S, VarDecl *D); 817 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 818 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 819 QualType R, TypeSourceInfo *TInfo, 820 LookupResult &Previous, bool &Redeclaration); 821 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 822 QualType R, TypeSourceInfo *TInfo, 823 LookupResult &Previous, 824 MultiTemplateParamsArg TemplateParamLists, 825 bool &Redeclaration); 826 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 827 bool &Redeclaration); 828 void CheckCompleteVariableDeclaration(VarDecl *var); 829 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 830 QualType R, TypeSourceInfo *TInfo, 831 LookupResult &Previous, 832 MultiTemplateParamsArg TemplateParamLists, 833 bool IsFunctionDefinition, 834 bool &Redeclaration); 835 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 836 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 837 void CheckFunctionDeclaration(Scope *S, 838 FunctionDecl *NewFD, LookupResult &Previous, 839 bool IsExplicitSpecialization, 840 bool &Redeclaration); 841 void CheckMain(FunctionDecl *FD); 842 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 843 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 844 SourceLocation Loc, 845 QualType T); 846 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 847 SourceLocation NameLoc, IdentifierInfo *Name, 848 QualType T, TypeSourceInfo *TSInfo, 849 StorageClass SC, StorageClass SCAsWritten); 850 void ActOnParamDefaultArgument(Decl *param, 851 SourceLocation EqualLoc, 852 Expr *defarg); 853 void ActOnParamUnparsedDefaultArgument(Decl *param, 854 SourceLocation EqualLoc, 855 SourceLocation ArgLoc); 856 void ActOnParamDefaultArgumentError(Decl *param); 857 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 858 SourceLocation EqualLoc); 859 860 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 861 bool TypeMayContainAuto); 862 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 863 void ActOnInitializerError(Decl *Dcl); 864 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 865 void FinalizeDeclaration(Decl *D); 866 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 867 Decl **Group, 868 unsigned NumDecls); 869 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 870 bool TypeMayContainAuto = true); 871 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 872 SourceLocation LocAfterDecls); 873 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 874 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 875 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 876 877 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 878 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 879 880 /// \brief Diagnose any unused parameters in the given sequence of 881 /// ParmVarDecl pointers. 882 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 883 ParmVarDecl * const *End); 884 885 /// \brief Diagnose whether the size of parameters or return value of a 886 /// function or obj-c method definition is pass-by-value and larger than a 887 /// specified threshold. 888 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 889 ParmVarDecl * const *End, 890 QualType ReturnTy, 891 NamedDecl *D); 892 893 void DiagnoseInvalidJumps(Stmt *Body); 894 Decl *ActOnFileScopeAsmDecl(Expr *expr, 895 SourceLocation AsmLoc, 896 SourceLocation RParenLoc); 897 898 /// Scope actions. 899 void ActOnPopScope(SourceLocation Loc, Scope *S); 900 void ActOnTranslationUnitScope(Scope *S); 901 902 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 903 /// no declarator (e.g. "struct foo;") is parsed. 904 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 905 DeclSpec &DS); 906 907 StmtResult ActOnVlaStmt(const DeclSpec &DS); 908 909 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 910 AccessSpecifier AS, 911 RecordDecl *Record); 912 913 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 914 RecordDecl *Record); 915 916 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 917 TagTypeKind NewTag, 918 SourceLocation NewTagLoc, 919 const IdentifierInfo &Name); 920 921 enum TagUseKind { 922 TUK_Reference, // Reference to a tag: 'struct foo *X;' 923 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 924 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 925 TUK_Friend // Friend declaration: 'friend struct foo;' 926 }; 927 928 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 929 SourceLocation KWLoc, CXXScopeSpec &SS, 930 IdentifierInfo *Name, SourceLocation NameLoc, 931 AttributeList *Attr, AccessSpecifier AS, 932 MultiTemplateParamsArg TemplateParameterLists, 933 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 934 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 935 936 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 937 unsigned TagSpec, SourceLocation TagLoc, 938 CXXScopeSpec &SS, 939 IdentifierInfo *Name, SourceLocation NameLoc, 940 AttributeList *Attr, 941 MultiTemplateParamsArg TempParamLists); 942 943 TypeResult ActOnDependentTag(Scope *S, 944 unsigned TagSpec, 945 TagUseKind TUK, 946 const CXXScopeSpec &SS, 947 IdentifierInfo *Name, 948 SourceLocation TagLoc, 949 SourceLocation NameLoc); 950 951 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 952 IdentifierInfo *ClassName, 953 llvm::SmallVectorImpl<Decl *> &Decls); 954 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 955 Declarator &D, Expr *BitfieldWidth); 956 957 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 958 Declarator &D, Expr *BitfieldWidth, 959 AccessSpecifier AS); 960 961 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 962 TypeSourceInfo *TInfo, 963 RecordDecl *Record, SourceLocation Loc, 964 bool Mutable, Expr *BitfieldWidth, 965 SourceLocation TSSL, 966 AccessSpecifier AS, NamedDecl *PrevDecl, 967 Declarator *D = 0); 968 969 enum CXXSpecialMember { 970 CXXInvalid = -1, 971 CXXConstructor = 0, 972 CXXCopyConstructor = 1, 973 CXXCopyAssignment = 2, 974 CXXDestructor = 3 975 }; 976 bool CheckNontrivialField(FieldDecl *FD); 977 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 978 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 979 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 980 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 981 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 982 Declarator &D, Expr *BitfieldWidth, 983 tok::ObjCKeywordKind visibility); 984 985 // This is used for both record definitions and ObjC interface declarations. 986 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 987 Decl **Fields, unsigned NumFields, 988 SourceLocation LBrac, SourceLocation RBrac, 989 AttributeList *AttrList); 990 991 /// ActOnTagStartDefinition - Invoked when we have entered the 992 /// scope of a tag's definition (e.g., for an enumeration, class, 993 /// struct, or union). 994 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 995 996 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 997 /// C++ record definition's base-specifiers clause and are starting its 998 /// member declarations. 999 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1000 ClassVirtSpecifiers &CVS, 1001 SourceLocation LBraceLoc); 1002 1003 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1004 /// the definition of a tag (enumeration, class, struct, or union). 1005 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1006 SourceLocation RBraceLoc); 1007 1008 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1009 /// error parsing the definition of a tag. 1010 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1011 1012 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1013 EnumConstantDecl *LastEnumConst, 1014 SourceLocation IdLoc, 1015 IdentifierInfo *Id, 1016 Expr *val); 1017 1018 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1019 SourceLocation IdLoc, IdentifierInfo *Id, 1020 AttributeList *Attrs, 1021 SourceLocation EqualLoc, Expr *Val); 1022 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1023 SourceLocation RBraceLoc, Decl *EnumDecl, 1024 Decl **Elements, unsigned NumElements, 1025 Scope *S, AttributeList *Attr); 1026 1027 DeclContext *getContainingDC(DeclContext *DC); 1028 1029 /// Set the current declaration context until it gets popped. 1030 void PushDeclContext(Scope *S, DeclContext *DC); 1031 void PopDeclContext(); 1032 1033 /// EnterDeclaratorContext - Used when we must lookup names in the context 1034 /// of a declarator's nested name specifier. 1035 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1036 void ExitDeclaratorContext(Scope *S); 1037 1038 DeclContext *getFunctionLevelDeclContext(); 1039 1040 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1041 /// to the function decl for the function being parsed. If we're currently 1042 /// in a 'block', this returns the containing context. 1043 FunctionDecl *getCurFunctionDecl(); 1044 1045 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1046 /// the method decl for the method being parsed. If we're currently 1047 /// in a 'block', this returns the containing context. 1048 ObjCMethodDecl *getCurMethodDecl(); 1049 1050 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1051 /// or C function we're in, otherwise return null. If we're currently 1052 /// in a 'block', this returns the containing context. 1053 NamedDecl *getCurFunctionOrMethodDecl(); 1054 1055 /// Add this decl to the scope shadowed decl chains. 1056 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1057 1058 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1059 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1060 /// true if 'D' belongs to the given declaration context. 1061 /// 1062 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1063 /// whether the declaration is in scope for the purposes of explicit template 1064 /// instantiation or specialization. The default is false. 1065 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1066 bool ExplicitInstantiationOrSpecialization = false); 1067 1068 /// Finds the scope corresponding to the given decl context, if it 1069 /// happens to be an enclosing scope. Otherwise return NULL. 1070 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1071 1072 /// Subroutines of ActOnDeclarator(). 1073 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1074 TypeSourceInfo *TInfo); 1075 void MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls); 1076 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1077 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1078 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1079 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1080 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1081 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1082 1083 // AssignmentAction - This is used by all the assignment diagnostic functions 1084 // to represent what is actually causing the operation 1085 enum AssignmentAction { 1086 AA_Assigning, 1087 AA_Passing, 1088 AA_Returning, 1089 AA_Converting, 1090 AA_Initializing, 1091 AA_Sending, 1092 AA_Casting 1093 }; 1094 1095 /// C++ Overloading. 1096 enum OverloadKind { 1097 /// This is a legitimate overload: the existing declarations are 1098 /// functions or function templates with different signatures. 1099 Ovl_Overload, 1100 1101 /// This is not an overload because the signature exactly matches 1102 /// an existing declaration. 1103 Ovl_Match, 1104 1105 /// This is not an overload because the lookup results contain a 1106 /// non-function. 1107 Ovl_NonFunction 1108 }; 1109 OverloadKind CheckOverload(Scope *S, 1110 FunctionDecl *New, 1111 const LookupResult &OldDecls, 1112 NamedDecl *&OldDecl, 1113 bool IsForUsingDecl); 1114 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1115 1116 bool TryImplicitConversion(InitializationSequence &Sequence, 1117 const InitializedEntity &Entity, 1118 Expr *From, 1119 bool SuppressUserConversions, 1120 bool AllowExplicit, 1121 bool InOverloadResolution, 1122 bool CStyle); 1123 1124 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1125 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1126 bool IsComplexPromotion(QualType FromType, QualType ToType); 1127 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1128 bool InOverloadResolution, 1129 QualType& ConvertedType, bool &IncompatibleObjC); 1130 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1131 QualType& ConvertedType, bool &IncompatibleObjC); 1132 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1133 QualType& ConvertedType); 1134 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1135 const FunctionProtoType *NewType); 1136 1137 bool CheckPointerConversion(Expr *From, QualType ToType, 1138 CastKind &Kind, 1139 CXXCastPath& BasePath, 1140 bool IgnoreBaseAccess); 1141 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1142 bool InOverloadResolution, 1143 QualType &ConvertedType); 1144 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1145 CastKind &Kind, 1146 CXXCastPath &BasePath, 1147 bool IgnoreBaseAccess); 1148 bool IsQualificationConversion(QualType FromType, QualType ToType, 1149 bool CStyle); 1150 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1151 1152 1153 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1154 const VarDecl *NRVOCandidate, 1155 QualType ResultType, 1156 Expr *Value); 1157 1158 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1159 SourceLocation EqualLoc, 1160 ExprResult Init); 1161 bool PerformObjectArgumentInitialization(Expr *&From, 1162 NestedNameSpecifier *Qualifier, 1163 NamedDecl *FoundDecl, 1164 CXXMethodDecl *Method); 1165 1166 bool PerformContextuallyConvertToBool(Expr *&From); 1167 bool PerformContextuallyConvertToObjCId(Expr *&From); 1168 1169 ExprResult 1170 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1171 const PartialDiagnostic &NotIntDiag, 1172 const PartialDiagnostic &IncompleteDiag, 1173 const PartialDiagnostic &ExplicitConvDiag, 1174 const PartialDiagnostic &ExplicitConvNote, 1175 const PartialDiagnostic &AmbigDiag, 1176 const PartialDiagnostic &AmbigNote, 1177 const PartialDiagnostic &ConvDiag); 1178 1179 bool PerformObjectMemberConversion(Expr *&From, 1180 NestedNameSpecifier *Qualifier, 1181 NamedDecl *FoundDecl, 1182 NamedDecl *Member); 1183 1184 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1185 // TODO: make this is a typesafe union. 1186 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1187 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1188 1189 void AddOverloadCandidate(NamedDecl *Function, 1190 DeclAccessPair FoundDecl, 1191 Expr **Args, unsigned NumArgs, 1192 OverloadCandidateSet &CandidateSet); 1193 1194 void AddOverloadCandidate(FunctionDecl *Function, 1195 DeclAccessPair FoundDecl, 1196 Expr **Args, unsigned NumArgs, 1197 OverloadCandidateSet& CandidateSet, 1198 bool SuppressUserConversions = false, 1199 bool PartialOverloading = false); 1200 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1201 Expr **Args, unsigned NumArgs, 1202 OverloadCandidateSet& CandidateSet, 1203 bool SuppressUserConversions = false); 1204 void AddMethodCandidate(DeclAccessPair FoundDecl, 1205 QualType ObjectType, 1206 Expr::Classification ObjectClassification, 1207 Expr **Args, unsigned NumArgs, 1208 OverloadCandidateSet& CandidateSet, 1209 bool SuppressUserConversion = false); 1210 void AddMethodCandidate(CXXMethodDecl *Method, 1211 DeclAccessPair FoundDecl, 1212 CXXRecordDecl *ActingContext, QualType ObjectType, 1213 Expr::Classification ObjectClassification, 1214 Expr **Args, unsigned NumArgs, 1215 OverloadCandidateSet& CandidateSet, 1216 bool SuppressUserConversions = false); 1217 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1218 DeclAccessPair FoundDecl, 1219 CXXRecordDecl *ActingContext, 1220 TemplateArgumentListInfo *ExplicitTemplateArgs, 1221 QualType ObjectType, 1222 Expr::Classification ObjectClassification, 1223 Expr **Args, unsigned NumArgs, 1224 OverloadCandidateSet& CandidateSet, 1225 bool SuppressUserConversions = false); 1226 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1227 DeclAccessPair FoundDecl, 1228 TemplateArgumentListInfo *ExplicitTemplateArgs, 1229 Expr **Args, unsigned NumArgs, 1230 OverloadCandidateSet& CandidateSet, 1231 bool SuppressUserConversions = false); 1232 void AddConversionCandidate(CXXConversionDecl *Conversion, 1233 DeclAccessPair FoundDecl, 1234 CXXRecordDecl *ActingContext, 1235 Expr *From, QualType ToType, 1236 OverloadCandidateSet& CandidateSet); 1237 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1238 DeclAccessPair FoundDecl, 1239 CXXRecordDecl *ActingContext, 1240 Expr *From, QualType ToType, 1241 OverloadCandidateSet &CandidateSet); 1242 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1243 DeclAccessPair FoundDecl, 1244 CXXRecordDecl *ActingContext, 1245 const FunctionProtoType *Proto, 1246 Expr *Object, Expr **Args, unsigned NumArgs, 1247 OverloadCandidateSet& CandidateSet); 1248 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1249 SourceLocation OpLoc, 1250 Expr **Args, unsigned NumArgs, 1251 OverloadCandidateSet& CandidateSet, 1252 SourceRange OpRange = SourceRange()); 1253 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1254 Expr **Args, unsigned NumArgs, 1255 OverloadCandidateSet& CandidateSet, 1256 bool IsAssignmentOperator = false, 1257 unsigned NumContextualBoolArguments = 0); 1258 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1259 SourceLocation OpLoc, 1260 Expr **Args, unsigned NumArgs, 1261 OverloadCandidateSet& CandidateSet); 1262 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1263 bool Operator, 1264 Expr **Args, unsigned NumArgs, 1265 TemplateArgumentListInfo *ExplicitTemplateArgs, 1266 OverloadCandidateSet& CandidateSet, 1267 bool PartialOverloading = false); 1268 1269 // Emit as a 'note' the specific overload candidate 1270 void NoteOverloadCandidate(FunctionDecl *Fn); 1271 1272 // Emit as a series of 'note's all template and non-templates 1273 // identified by the expression Expr 1274 void NoteAllOverloadCandidates(Expr* E); 1275 1276 // [PossiblyAFunctionType] --> [Return] 1277 // NonFunctionType --> NonFunctionType 1278 // R (A) --> R(A) 1279 // R (*)(A) --> R (A) 1280 // R (&)(A) --> R (A) 1281 // R (S::*)(A) --> R (A) 1282 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1283 1284 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1285 bool Complain, 1286 DeclAccessPair &Found); 1287 1288 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1289 bool Complain = false, 1290 DeclAccessPair* Found = 0); 1291 1292 Expr *FixOverloadedFunctionReference(Expr *E, 1293 DeclAccessPair FoundDecl, 1294 FunctionDecl *Fn); 1295 ExprResult FixOverloadedFunctionReference(ExprResult, 1296 DeclAccessPair FoundDecl, 1297 FunctionDecl *Fn); 1298 1299 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1300 Expr **Args, unsigned NumArgs, 1301 OverloadCandidateSet &CandidateSet, 1302 bool PartialOverloading = false); 1303 1304 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1305 UnresolvedLookupExpr *ULE, 1306 SourceLocation LParenLoc, 1307 Expr **Args, unsigned NumArgs, 1308 SourceLocation RParenLoc, 1309 Expr *ExecConfig); 1310 1311 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1312 unsigned Opc, 1313 const UnresolvedSetImpl &Fns, 1314 Expr *input); 1315 1316 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1317 unsigned Opc, 1318 const UnresolvedSetImpl &Fns, 1319 Expr *LHS, Expr *RHS); 1320 1321 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1322 SourceLocation RLoc, 1323 Expr *Base,Expr *Idx); 1324 1325 ExprResult 1326 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1327 SourceLocation LParenLoc, Expr **Args, 1328 unsigned NumArgs, SourceLocation RParenLoc); 1329 ExprResult 1330 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1331 Expr **Args, unsigned NumArgs, 1332 SourceLocation RParenLoc); 1333 1334 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1335 SourceLocation OpLoc); 1336 1337 /// CheckCallReturnType - Checks that a call expression's return type is 1338 /// complete. Returns true on failure. The location passed in is the location 1339 /// that best represents the call. 1340 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1341 CallExpr *CE, FunctionDecl *FD); 1342 1343 /// Helpers for dealing with blocks and functions. 1344 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1345 bool CheckParameterNames); 1346 void CheckCXXDefaultArguments(FunctionDecl *FD); 1347 void CheckExtraCXXDefaultArguments(Declarator &D); 1348 Scope *getNonFieldDeclScope(Scope *S); 1349 1350 /// \name Name lookup 1351 /// 1352 /// These routines provide name lookup that is used during semantic 1353 /// analysis to resolve the various kinds of names (identifiers, 1354 /// overloaded operator names, constructor names, etc.) into zero or 1355 /// more declarations within a particular scope. The major entry 1356 /// points are LookupName, which performs unqualified name lookup, 1357 /// and LookupQualifiedName, which performs qualified name lookup. 1358 /// 1359 /// All name lookup is performed based on some specific criteria, 1360 /// which specify what names will be visible to name lookup and how 1361 /// far name lookup should work. These criteria are important both 1362 /// for capturing language semantics (certain lookups will ignore 1363 /// certain names, for example) and for performance, since name 1364 /// lookup is often a bottleneck in the compilation of C++. Name 1365 /// lookup criteria is specified via the LookupCriteria enumeration. 1366 /// 1367 /// The results of name lookup can vary based on the kind of name 1368 /// lookup performed, the current language, and the translation 1369 /// unit. In C, for example, name lookup will either return nothing 1370 /// (no entity found) or a single declaration. In C++, name lookup 1371 /// can additionally refer to a set of overloaded functions or 1372 /// result in an ambiguity. All of the possible results of name 1373 /// lookup are captured by the LookupResult class, which provides 1374 /// the ability to distinguish among them. 1375 //@{ 1376 1377 /// @brief Describes the kind of name lookup to perform. 1378 enum LookupNameKind { 1379 /// Ordinary name lookup, which finds ordinary names (functions, 1380 /// variables, typedefs, etc.) in C and most kinds of names 1381 /// (functions, variables, members, types, etc.) in C++. 1382 LookupOrdinaryName = 0, 1383 /// Tag name lookup, which finds the names of enums, classes, 1384 /// structs, and unions. 1385 LookupTagName, 1386 /// Label name lookup. 1387 LookupLabel, 1388 /// Member name lookup, which finds the names of 1389 /// class/struct/union members. 1390 LookupMemberName, 1391 /// Look up of an operator name (e.g., operator+) for use with 1392 /// operator overloading. This lookup is similar to ordinary name 1393 /// lookup, but will ignore any declarations that are class members. 1394 LookupOperatorName, 1395 /// Look up of a name that precedes the '::' scope resolution 1396 /// operator in C++. This lookup completely ignores operator, object, 1397 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1398 LookupNestedNameSpecifierName, 1399 /// Look up a namespace name within a C++ using directive or 1400 /// namespace alias definition, ignoring non-namespace names (C++ 1401 /// [basic.lookup.udir]p1). 1402 LookupNamespaceName, 1403 /// Look up all declarations in a scope with the given name, 1404 /// including resolved using declarations. This is appropriate 1405 /// for checking redeclarations for a using declaration. 1406 LookupUsingDeclName, 1407 /// Look up an ordinary name that is going to be redeclared as a 1408 /// name with linkage. This lookup ignores any declarations that 1409 /// are outside of the current scope unless they have linkage. See 1410 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1411 LookupRedeclarationWithLinkage, 1412 /// Look up the name of an Objective-C protocol. 1413 LookupObjCProtocolName, 1414 /// \brief Look up any declaration with any name. 1415 LookupAnyName 1416 }; 1417 1418 /// \brief Specifies whether (or how) name lookup is being performed for a 1419 /// redeclaration (vs. a reference). 1420 enum RedeclarationKind { 1421 /// \brief The lookup is a reference to this name that is not for the 1422 /// purpose of redeclaring the name. 1423 NotForRedeclaration = 0, 1424 /// \brief The lookup results will be used for redeclaration of a name, 1425 /// if an entity by that name already exists. 1426 ForRedeclaration 1427 }; 1428 1429private: 1430 bool CppLookupName(LookupResult &R, Scope *S); 1431 1432public: 1433 /// \brief Look up a name, looking for a single declaration. Return 1434 /// null if the results were absent, ambiguous, or overloaded. 1435 /// 1436 /// It is preferable to use the elaborated form and explicitly handle 1437 /// ambiguity and overloaded. 1438 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1439 SourceLocation Loc, 1440 LookupNameKind NameKind, 1441 RedeclarationKind Redecl 1442 = NotForRedeclaration); 1443 bool LookupName(LookupResult &R, Scope *S, 1444 bool AllowBuiltinCreation = false); 1445 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1446 bool InUnqualifiedLookup = false); 1447 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1448 bool AllowBuiltinCreation = false, 1449 bool EnteringContext = false); 1450 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1451 1452 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1453 QualType T1, QualType T2, 1454 UnresolvedSetImpl &Functions); 1455 1456 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1457 SourceLocation GnuLabelLoc = SourceLocation()); 1458 1459 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1460 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1461 1462 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1463 Expr **Args, unsigned NumArgs, 1464 ADLResult &Functions); 1465 1466 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1467 VisibleDeclConsumer &Consumer, 1468 bool IncludeGlobalScope = true); 1469 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1470 VisibleDeclConsumer &Consumer, 1471 bool IncludeGlobalScope = true); 1472 1473 /// \brief The context in which typo-correction occurs. 1474 /// 1475 /// The typo-correction context affects which keywords (if any) are 1476 /// considered when trying to correct for typos. 1477 enum CorrectTypoContext { 1478 /// \brief An unknown context, where any keyword might be valid. 1479 CTC_Unknown, 1480 /// \brief A context where no keywords are used (e.g. we expect an actual 1481 /// name). 1482 CTC_NoKeywords, 1483 /// \brief A context where we're correcting a type name. 1484 CTC_Type, 1485 /// \brief An expression context. 1486 CTC_Expression, 1487 /// \brief A type cast, or anything else that can be followed by a '<'. 1488 CTC_CXXCasts, 1489 /// \brief A member lookup context. 1490 CTC_MemberLookup, 1491 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1492 CTC_ObjCIvarLookup, 1493 /// \brief An Objective-C property lookup context (e.g., self.prop). 1494 CTC_ObjCPropertyLookup, 1495 /// \brief The receiver of an Objective-C message send within an 1496 /// Objective-C method where 'super' is a valid keyword. 1497 CTC_ObjCMessageReceiver 1498 }; 1499 1500 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1501 DeclContext *MemberContext = 0, 1502 bool EnteringContext = false, 1503 CorrectTypoContext CTC = CTC_Unknown, 1504 const ObjCObjectPointerType *OPT = 0); 1505 1506 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1507 AssociatedNamespaceSet &AssociatedNamespaces, 1508 AssociatedClassSet &AssociatedClasses); 1509 1510 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1511 //@} 1512 1513 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1514 SourceLocation IdLoc, 1515 bool TypoCorrection = false); 1516 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1517 Scope *S, bool ForRedeclaration, 1518 SourceLocation Loc); 1519 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1520 Scope *S); 1521 void AddKnownFunctionAttributes(FunctionDecl *FD); 1522 1523 // More parsing and symbol table subroutines. 1524 1525 // Decl attributes - this routine is the top level dispatcher. 1526 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1527 bool NonInheritable = true, bool Inheritable = true); 1528 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1529 bool NonInheritable = true, bool Inheritable = true); 1530 1531 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1532 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1533 bool CheckNoReturnAttr(const AttributeList &attr); 1534 1535 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1536 bool &IncompleteImpl, unsigned DiagID); 1537 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1538 ObjCMethodDecl *MethodDecl, 1539 bool IsProtocolMethodDecl); 1540 1541 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1542 ObjCInterfaceDecl *IDecl); 1543 1544 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1545 1546 /// CheckProtocolMethodDefs - This routine checks unimplemented 1547 /// methods declared in protocol, and those referenced by it. 1548 /// \param IDecl - Used for checking for methods which may have been 1549 /// inherited. 1550 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1551 ObjCProtocolDecl *PDecl, 1552 bool& IncompleteImpl, 1553 const SelectorSet &InsMap, 1554 const SelectorSet &ClsMap, 1555 ObjCContainerDecl *CDecl); 1556 1557 /// CheckImplementationIvars - This routine checks if the instance variables 1558 /// listed in the implelementation match those listed in the interface. 1559 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1560 ObjCIvarDecl **Fields, unsigned nIvars, 1561 SourceLocation Loc); 1562 1563 /// \brief Determine whether we can synthesize a provisional ivar for the 1564 /// given name. 1565 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1566 1567 /// \brief Determine whether we can synthesize a provisional ivar for the 1568 /// given property. 1569 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1570 1571 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1572 /// remains unimplemented in the class or category @implementation. 1573 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1574 ObjCContainerDecl* IDecl, 1575 bool IncompleteImpl = false); 1576 1577 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1578 /// which must be implemented by this implementation. 1579 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1580 ObjCContainerDecl *CDecl, 1581 const SelectorSet &InsMap); 1582 1583 /// DefaultSynthesizeProperties - This routine default synthesizes all 1584 /// properties which must be synthesized in class's @implementation. 1585 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1586 ObjCInterfaceDecl *IDecl); 1587 1588 /// CollectImmediateProperties - This routine collects all properties in 1589 /// the class and its conforming protocols; but not those it its super class. 1590 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1591 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1592 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1593 1594 1595 /// LookupPropertyDecl - Looks up a property in the current class and all 1596 /// its protocols. 1597 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1598 IdentifierInfo *II); 1599 1600 /// Called by ActOnProperty to handle @property declarations in 1601 //// class extensions. 1602 Decl *HandlePropertyInClassExtension(Scope *S, 1603 ObjCCategoryDecl *CDecl, 1604 SourceLocation AtLoc, 1605 FieldDeclarator &FD, 1606 Selector GetterSel, 1607 Selector SetterSel, 1608 const bool isAssign, 1609 const bool isReadWrite, 1610 const unsigned Attributes, 1611 bool *isOverridingProperty, 1612 TypeSourceInfo *T, 1613 tok::ObjCKeywordKind MethodImplKind); 1614 1615 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1616 /// handle creating the ObjcPropertyDecl for a category or @interface. 1617 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1618 ObjCContainerDecl *CDecl, 1619 SourceLocation AtLoc, 1620 FieldDeclarator &FD, 1621 Selector GetterSel, 1622 Selector SetterSel, 1623 const bool isAssign, 1624 const bool isReadWrite, 1625 const unsigned Attributes, 1626 TypeSourceInfo *T, 1627 tok::ObjCKeywordKind MethodImplKind, 1628 DeclContext *lexicalDC = 0); 1629 1630 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1631 /// warning) when atomic property has one but not the other user-declared 1632 /// setter or getter. 1633 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1634 ObjCContainerDecl* IDecl); 1635 1636 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1637 1638 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1639 /// true, or false, accordingly. 1640 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1641 const ObjCMethodDecl *PrevMethod, 1642 bool matchBasedOnSizeAndAlignment = false, 1643 bool matchBasedOnStrictEqulity = false); 1644 1645 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1646 /// or protocol against those declared in their implementations. 1647 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1648 const SelectorSet &ClsMap, 1649 SelectorSet &InsMapSeen, 1650 SelectorSet &ClsMapSeen, 1651 ObjCImplDecl* IMPDecl, 1652 ObjCContainerDecl* IDecl, 1653 bool &IncompleteImpl, 1654 bool ImmediateClass); 1655 1656private: 1657 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1658 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1659 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1660 1661 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1662 /// optionally warns if there are multiple signatures. 1663 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1664 bool receiverIdOrClass, 1665 bool warn, bool instance); 1666 1667public: 1668 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1669 /// unit are added to a global pool. This allows us to efficiently associate 1670 /// a selector with a method declaraation for purposes of typechecking 1671 /// messages sent to "id" (where the class of the object is unknown). 1672 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1673 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1674 } 1675 1676 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1677 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1678 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1679 } 1680 1681 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1682 /// there are multiple signatures. 1683 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1684 bool receiverIdOrClass=false, 1685 bool warn=true) { 1686 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1687 warn, /*instance*/true); 1688 } 1689 1690 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1691 /// there are multiple signatures. 1692 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1693 bool receiverIdOrClass=false, 1694 bool warn=true) { 1695 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1696 warn, /*instance*/false); 1697 } 1698 1699 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1700 /// implementation. 1701 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1702 1703 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1704 /// initialization. 1705 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1706 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1707 1708 //===--------------------------------------------------------------------===// 1709 // Statement Parsing Callbacks: SemaStmt.cpp. 1710public: 1711 class FullExprArg { 1712 public: 1713 FullExprArg(Sema &actions) : E(0) { } 1714 1715 // FIXME: The const_cast here is ugly. RValue references would make this 1716 // much nicer (or we could duplicate a bunch of the move semantics 1717 // emulation code from Ownership.h). 1718 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1719 1720 ExprResult release() { 1721 return move(E); 1722 } 1723 1724 Expr *get() const { return E; } 1725 1726 Expr *operator->() { 1727 return E; 1728 } 1729 1730 private: 1731 // FIXME: No need to make the entire Sema class a friend when it's just 1732 // Sema::MakeFullExpr that needs access to the constructor below. 1733 friend class Sema; 1734 1735 explicit FullExprArg(Expr *expr) : E(expr) {} 1736 1737 Expr *E; 1738 }; 1739 1740 FullExprArg MakeFullExpr(Expr *Arg) { 1741 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1742 } 1743 1744 StmtResult ActOnExprStmt(FullExprArg Expr); 1745 1746 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1747 bool LeadingEmptyMacro = false); 1748 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1749 MultiStmtArg Elts, 1750 bool isStmtExpr); 1751 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1752 SourceLocation StartLoc, 1753 SourceLocation EndLoc); 1754 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1755 StmtResult ActOnForEachLValueExpr(Expr *E); 1756 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1757 SourceLocation DotDotDotLoc, Expr *RHSVal, 1758 SourceLocation ColonLoc); 1759 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1760 1761 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1762 SourceLocation ColonLoc, 1763 Stmt *SubStmt, Scope *CurScope); 1764 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1765 SourceLocation ColonLoc, Stmt *SubStmt); 1766 1767 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1768 FullExprArg CondVal, Decl *CondVar, 1769 Stmt *ThenVal, 1770 SourceLocation ElseLoc, Stmt *ElseVal); 1771 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1772 Expr *Cond, 1773 Decl *CondVar); 1774 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1775 Stmt *Switch, Stmt *Body); 1776 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1777 FullExprArg Cond, 1778 Decl *CondVar, Stmt *Body); 1779 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1780 SourceLocation WhileLoc, 1781 SourceLocation CondLParen, Expr *Cond, 1782 SourceLocation CondRParen); 1783 1784 StmtResult ActOnForStmt(SourceLocation ForLoc, 1785 SourceLocation LParenLoc, 1786 Stmt *First, FullExprArg Second, 1787 Decl *SecondVar, 1788 FullExprArg Third, 1789 SourceLocation RParenLoc, 1790 Stmt *Body); 1791 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1792 SourceLocation LParenLoc, 1793 Stmt *First, Expr *Second, 1794 SourceLocation RParenLoc, Stmt *Body); 1795 1796 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1797 SourceLocation LabelLoc, 1798 LabelDecl *TheDecl); 1799 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1800 SourceLocation StarLoc, 1801 Expr *DestExp); 1802 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1803 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1804 1805 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1806 bool AllowFunctionParameters); 1807 1808 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1809 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1810 1811 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1812 bool IsSimple, bool IsVolatile, 1813 unsigned NumOutputs, unsigned NumInputs, 1814 IdentifierInfo **Names, 1815 MultiExprArg Constraints, 1816 MultiExprArg Exprs, 1817 Expr *AsmString, 1818 MultiExprArg Clobbers, 1819 SourceLocation RParenLoc, 1820 bool MSAsm = false); 1821 1822 1823 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1824 SourceLocation StartLoc, 1825 SourceLocation IdLoc, IdentifierInfo *Id, 1826 bool Invalid = false); 1827 1828 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1829 1830 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1831 Decl *Parm, Stmt *Body); 1832 1833 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1834 1835 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1836 MultiStmtArg Catch, Stmt *Finally); 1837 1838 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1839 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1840 Scope *CurScope); 1841 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1842 Expr *SynchExpr, 1843 Stmt *SynchBody); 1844 1845 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 1846 SourceLocation StartLoc, 1847 SourceLocation IdLoc, 1848 IdentifierInfo *Id); 1849 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1850 1851 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1852 Decl *ExDecl, Stmt *HandlerBlock); 1853 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1854 MultiStmtArg Handlers); 1855 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1856 1857 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1858 1859 /// \brief If it's a file scoped decl that must warn if not used, keep track 1860 /// of it. 1861 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1862 1863 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1864 /// whose result is unused, warn. 1865 void DiagnoseUnusedExprResult(const Stmt *S); 1866 void DiagnoseUnusedDecl(const NamedDecl *ND); 1867 1868 ParsingDeclState PushParsingDeclaration() { 1869 return DelayedDiagnostics.pushParsingDecl(); 1870 } 1871 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 1872 DelayedDiagnostics::popParsingDecl(*this, state, decl); 1873 } 1874 1875 typedef ProcessingContextState ParsingClassState; 1876 ParsingClassState PushParsingClass() { 1877 return DelayedDiagnostics.pushContext(); 1878 } 1879 void PopParsingClass(ParsingClassState state) { 1880 DelayedDiagnostics.popContext(state); 1881 } 1882 1883 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1884 SourceLocation Loc, bool UnknownObjCClass=false); 1885 1886 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1887 1888 //===--------------------------------------------------------------------===// 1889 // Expression Parsing Callbacks: SemaExpr.cpp. 1890 1891 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1892 bool UnknownObjCClass=false); 1893 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1894 ObjCMethodDecl *Getter, 1895 SourceLocation Loc); 1896 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1897 Expr **Args, unsigned NumArgs); 1898 1899 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1900 1901 void PopExpressionEvaluationContext(); 1902 1903 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1904 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1905 void MarkDeclarationsReferencedInExpr(Expr *E); 1906 1907 /// \brief Conditionally issue a diagnostic based on the current 1908 /// evaluation context. 1909 /// 1910 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 1911 /// the function body is parsed, and then do a basic reachability analysis to 1912 /// determine if the statement is reachable. If it is unreachable, the 1913 /// diagnostic will not be emitted. 1914 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 1915 const PartialDiagnostic &PD); 1916 1917 // Primary Expressions. 1918 SourceRange getExprRange(Expr *E) const; 1919 1920 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1921 bool HasTrailingLParen, bool IsAddressOfOperand); 1922 1923 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1924 CorrectTypoContext CTC = CTC_Unknown); 1925 1926 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1927 bool AllowBuiltinCreation=false); 1928 1929 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1930 const DeclarationNameInfo &NameInfo, 1931 bool isAddressOfOperand, 1932 const TemplateArgumentListInfo *TemplateArgs); 1933 1934 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1935 ExprValueKind VK, 1936 SourceLocation Loc, 1937 const CXXScopeSpec *SS = 0); 1938 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1939 ExprValueKind VK, 1940 const DeclarationNameInfo &NameInfo, 1941 const CXXScopeSpec *SS = 0); 1942 ExprResult 1943 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 1944 SourceLocation nameLoc, 1945 IndirectFieldDecl *indirectField, 1946 Expr *baseObjectExpr = 0, 1947 SourceLocation opLoc = SourceLocation()); 1948 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1949 LookupResult &R, 1950 const TemplateArgumentListInfo *TemplateArgs); 1951 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1952 LookupResult &R, 1953 const TemplateArgumentListInfo *TemplateArgs, 1954 bool IsDefiniteInstance); 1955 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1956 const LookupResult &R, 1957 bool HasTrailingLParen); 1958 1959 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1960 const DeclarationNameInfo &NameInfo); 1961 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1962 const DeclarationNameInfo &NameInfo, 1963 const TemplateArgumentListInfo *TemplateArgs); 1964 1965 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1966 LookupResult &R, 1967 bool ADL); 1968 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1969 const DeclarationNameInfo &NameInfo, 1970 NamedDecl *D); 1971 1972 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 1973 ExprResult ActOnNumericConstant(const Token &); 1974 ExprResult ActOnCharacterConstant(const Token &); 1975 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 1976 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 1977 SourceLocation R, 1978 MultiExprArg Val, 1979 ParsedType TypeOfCast = ParsedType()); 1980 1981 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 1982 /// fragments (e.g. "foo" "bar" L"baz"). 1983 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 1984 1985 // Binary/Unary Operators. 'Tok' is the token for the operator. 1986 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 1987 Expr *InputArg); 1988 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 1989 UnaryOperatorKind Opc, Expr *input); 1990 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 1991 tok::TokenKind Op, Expr *Input); 1992 1993 ExprResult CreateSizeOfAlignOfExpr(TypeSourceInfo *T, 1994 SourceLocation OpLoc, 1995 bool isSizeOf, SourceRange R); 1996 ExprResult CreateSizeOfAlignOfExpr(Expr *E, SourceLocation OpLoc, 1997 bool isSizeOf, SourceRange R); 1998 ExprResult 1999 ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType, 2000 void *TyOrEx, const SourceRange &ArgRange); 2001 2002 ExprResult CheckPlaceholderExpr(Expr *E, SourceLocation Loc); 2003 2004 bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc, 2005 SourceRange R, bool isSizeof); 2006 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2007 SourceLocation OpLoc, 2008 IdentifierInfo &Name, 2009 SourceLocation NameLoc, 2010 SourceLocation RParenLoc); 2011 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2012 tok::TokenKind Kind, Expr *Input); 2013 2014 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2015 Expr *Idx, SourceLocation RLoc); 2016 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2017 Expr *Idx, SourceLocation RLoc); 2018 2019 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2020 SourceLocation OpLoc, bool IsArrow, 2021 CXXScopeSpec &SS, 2022 NamedDecl *FirstQualifierInScope, 2023 const DeclarationNameInfo &NameInfo, 2024 const TemplateArgumentListInfo *TemplateArgs); 2025 2026 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2027 SourceLocation OpLoc, bool IsArrow, 2028 const CXXScopeSpec &SS, 2029 NamedDecl *FirstQualifierInScope, 2030 LookupResult &R, 2031 const TemplateArgumentListInfo *TemplateArgs, 2032 bool SuppressQualifierCheck = false); 2033 2034 ExprResult LookupMemberExpr(LookupResult &R, Expr *&Base, 2035 bool &IsArrow, SourceLocation OpLoc, 2036 CXXScopeSpec &SS, 2037 Decl *ObjCImpDecl, 2038 bool HasTemplateArgs); 2039 2040 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2041 const CXXScopeSpec &SS, 2042 const LookupResult &R); 2043 2044 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2045 bool IsArrow, SourceLocation OpLoc, 2046 const CXXScopeSpec &SS, 2047 NamedDecl *FirstQualifierInScope, 2048 const DeclarationNameInfo &NameInfo, 2049 const TemplateArgumentListInfo *TemplateArgs); 2050 2051 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2052 SourceLocation OpLoc, 2053 tok::TokenKind OpKind, 2054 CXXScopeSpec &SS, 2055 UnqualifiedId &Member, 2056 Decl *ObjCImpDecl, 2057 bool HasTrailingLParen); 2058 2059 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2060 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2061 FunctionDecl *FDecl, 2062 const FunctionProtoType *Proto, 2063 Expr **Args, unsigned NumArgs, 2064 SourceLocation RParenLoc); 2065 2066 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2067 /// This provides the location of the left/right parens and a list of comma 2068 /// locations. 2069 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2070 MultiExprArg Args, SourceLocation RParenLoc, 2071 Expr *ExecConfig = 0); 2072 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2073 SourceLocation LParenLoc, 2074 Expr **Args, unsigned NumArgs, 2075 SourceLocation RParenLoc, 2076 Expr *ExecConfig = 0); 2077 2078 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2079 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2080 2081 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2082 ParsedType Ty, SourceLocation RParenLoc, 2083 Expr *Op); 2084 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2085 TypeSourceInfo *Ty, 2086 SourceLocation RParenLoc, 2087 Expr *Op); 2088 2089 bool TypeIsVectorType(ParsedType Ty) { 2090 return GetTypeFromParser(Ty)->isVectorType(); 2091 } 2092 2093 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2094 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2095 SourceLocation RParenLoc, Expr *E, 2096 TypeSourceInfo *TInfo); 2097 2098 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2099 ParsedType Ty, 2100 SourceLocation RParenLoc, 2101 Expr *Op); 2102 2103 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2104 TypeSourceInfo *TInfo, 2105 SourceLocation RParenLoc, 2106 Expr *InitExpr); 2107 2108 ExprResult ActOnInitList(SourceLocation LParenLoc, 2109 MultiExprArg InitList, 2110 SourceLocation RParenLoc); 2111 2112 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2113 SourceLocation Loc, 2114 bool GNUSyntax, 2115 ExprResult Init); 2116 2117 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2118 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2119 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2120 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2121 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2122 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2123 2124 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2125 /// in the case of a the GNU conditional expr extension. 2126 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2127 SourceLocation ColonLoc, 2128 Expr *Cond, Expr *LHS, Expr *RHS); 2129 2130 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2131 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2132 LabelDecl *LD); 2133 2134 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2135 SourceLocation RPLoc); // "({..})" 2136 2137 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2138 struct OffsetOfComponent { 2139 SourceLocation LocStart, LocEnd; 2140 bool isBrackets; // true if [expr], false if .ident 2141 union { 2142 IdentifierInfo *IdentInfo; 2143 ExprTy *E; 2144 } U; 2145 }; 2146 2147 /// __builtin_offsetof(type, a.b[123][456].c) 2148 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2149 TypeSourceInfo *TInfo, 2150 OffsetOfComponent *CompPtr, 2151 unsigned NumComponents, 2152 SourceLocation RParenLoc); 2153 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2154 SourceLocation BuiltinLoc, 2155 SourceLocation TypeLoc, 2156 ParsedType Arg1, 2157 OffsetOfComponent *CompPtr, 2158 unsigned NumComponents, 2159 SourceLocation RParenLoc); 2160 2161 // __builtin_choose_expr(constExpr, expr1, expr2) 2162 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2163 Expr *cond, Expr *expr1, 2164 Expr *expr2, SourceLocation RPLoc); 2165 2166 // __builtin_va_arg(expr, type) 2167 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2168 Expr *expr, ParsedType type, 2169 SourceLocation RPLoc); 2170 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2171 Expr *expr, TypeSourceInfo *TInfo, 2172 SourceLocation RPLoc); 2173 2174 // __null 2175 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2176 2177 //===------------------------- "Block" Extension ------------------------===// 2178 2179 /// ActOnBlockStart - This callback is invoked when a block literal is 2180 /// started. 2181 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2182 2183 /// ActOnBlockArguments - This callback allows processing of block arguments. 2184 /// If there are no arguments, this is still invoked. 2185 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2186 2187 /// ActOnBlockError - If there is an error parsing a block, this callback 2188 /// is invoked to pop the information about the block from the action impl. 2189 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2190 2191 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2192 /// literal was successfully completed. ^(int x){...} 2193 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2194 Stmt *Body, Scope *CurScope); 2195 2196 //===---------------------------- C++ Features --------------------------===// 2197 2198 // Act on C++ namespaces 2199 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2200 SourceLocation NamespaceLoc, 2201 SourceLocation IdentLoc, 2202 IdentifierInfo *Ident, 2203 SourceLocation LBrace, 2204 AttributeList *AttrList); 2205 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2206 2207 NamespaceDecl *getStdNamespace() const; 2208 NamespaceDecl *getOrCreateStdNamespace(); 2209 2210 CXXRecordDecl *getStdBadAlloc() const; 2211 2212 Decl *ActOnUsingDirective(Scope *CurScope, 2213 SourceLocation UsingLoc, 2214 SourceLocation NamespcLoc, 2215 CXXScopeSpec &SS, 2216 SourceLocation IdentLoc, 2217 IdentifierInfo *NamespcName, 2218 AttributeList *AttrList); 2219 2220 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2221 2222 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2223 SourceLocation NamespaceLoc, 2224 SourceLocation AliasLoc, 2225 IdentifierInfo *Alias, 2226 CXXScopeSpec &SS, 2227 SourceLocation IdentLoc, 2228 IdentifierInfo *Ident); 2229 2230 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2231 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2232 const LookupResult &PreviousDecls); 2233 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2234 NamedDecl *Target); 2235 2236 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2237 bool isTypeName, 2238 const CXXScopeSpec &SS, 2239 SourceLocation NameLoc, 2240 const LookupResult &Previous); 2241 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2242 const CXXScopeSpec &SS, 2243 SourceLocation NameLoc); 2244 2245 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2246 SourceLocation UsingLoc, 2247 CXXScopeSpec &SS, 2248 const DeclarationNameInfo &NameInfo, 2249 AttributeList *AttrList, 2250 bool IsInstantiation, 2251 bool IsTypeName, 2252 SourceLocation TypenameLoc); 2253 2254 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2255 2256 Decl *ActOnUsingDeclaration(Scope *CurScope, 2257 AccessSpecifier AS, 2258 bool HasUsingKeyword, 2259 SourceLocation UsingLoc, 2260 CXXScopeSpec &SS, 2261 UnqualifiedId &Name, 2262 AttributeList *AttrList, 2263 bool IsTypeName, 2264 SourceLocation TypenameLoc); 2265 2266 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2267 /// ActOnDeclarator, when a C++ direct initializer is present. 2268 /// e.g: "int x(1);" 2269 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2270 SourceLocation LParenLoc, 2271 MultiExprArg Exprs, 2272 SourceLocation RParenLoc, 2273 bool TypeMayContainAuto); 2274 2275 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2276 /// and sets it as the initializer for the the passed in VarDecl. 2277 bool InitializeVarWithConstructor(VarDecl *VD, 2278 CXXConstructorDecl *Constructor, 2279 MultiExprArg Exprs); 2280 2281 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2282 /// including handling of its default argument expressions. 2283 /// 2284 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2285 ExprResult 2286 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2287 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2288 bool RequiresZeroInit, unsigned ConstructKind, 2289 SourceRange ParenRange); 2290 2291 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2292 // the constructor can be elidable? 2293 ExprResult 2294 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2295 CXXConstructorDecl *Constructor, bool Elidable, 2296 MultiExprArg Exprs, bool RequiresZeroInit, 2297 unsigned ConstructKind, 2298 SourceRange ParenRange); 2299 2300 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2301 /// the default expr if needed. 2302 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2303 FunctionDecl *FD, 2304 ParmVarDecl *Param); 2305 2306 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2307 /// constructed variable. 2308 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2309 2310 /// \brief Declare the implicit default constructor for the given class. 2311 /// 2312 /// \param ClassDecl The class declaration into which the implicit 2313 /// default constructor will be added. 2314 /// 2315 /// \returns The implicitly-declared default constructor. 2316 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2317 CXXRecordDecl *ClassDecl); 2318 2319 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2320 /// defining this constructor as the default constructor. 2321 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2322 CXXConstructorDecl *Constructor); 2323 2324 /// \brief Declare the implicit destructor for the given class. 2325 /// 2326 /// \param ClassDecl The class declaration into which the implicit 2327 /// destructor will be added. 2328 /// 2329 /// \returns The implicitly-declared destructor. 2330 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2331 2332 /// DefineImplicitDestructor - Checks for feasibility of 2333 /// defining this destructor as the default destructor. 2334 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2335 CXXDestructorDecl *Destructor); 2336 2337 /// \brief Declare all inherited constructors for the given class. 2338 /// 2339 /// \param ClassDecl The class declaration into which the inherited 2340 /// constructors will be added. 2341 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2342 2343 /// \brief Declare the implicit copy constructor for the given class. 2344 /// 2345 /// \param S The scope of the class, which may be NULL if this is a 2346 /// template instantiation. 2347 /// 2348 /// \param ClassDecl The class declaration into which the implicit 2349 /// copy constructor will be added. 2350 /// 2351 /// \returns The implicitly-declared copy constructor. 2352 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2353 2354 /// DefineImplicitCopyConstructor - Checks for feasibility of 2355 /// defining this constructor as the copy constructor. 2356 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2357 CXXConstructorDecl *Constructor, 2358 unsigned TypeQuals); 2359 2360 /// \brief Declare the implicit copy assignment operator for the given class. 2361 /// 2362 /// \param S The scope of the class, which may be NULL if this is a 2363 /// template instantiation. 2364 /// 2365 /// \param ClassDecl The class declaration into which the implicit 2366 /// copy-assignment operator will be added. 2367 /// 2368 /// \returns The implicitly-declared copy assignment operator. 2369 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2370 2371 /// \brief Defined an implicitly-declared copy assignment operator. 2372 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2373 CXXMethodDecl *MethodDecl); 2374 2375 /// \brief Force the declaration of any implicitly-declared members of this 2376 /// class. 2377 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2378 2379 /// MaybeBindToTemporary - If the passed in expression has a record type with 2380 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2381 /// it simply returns the passed in expression. 2382 ExprResult MaybeBindToTemporary(Expr *E); 2383 2384 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2385 MultiExprArg ArgsPtr, 2386 SourceLocation Loc, 2387 ASTOwningVector<Expr*> &ConvertedArgs); 2388 2389 ParsedType getDestructorName(SourceLocation TildeLoc, 2390 IdentifierInfo &II, SourceLocation NameLoc, 2391 Scope *S, CXXScopeSpec &SS, 2392 ParsedType ObjectType, 2393 bool EnteringContext); 2394 2395 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2396 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2397 tok::TokenKind Kind, 2398 SourceLocation LAngleBracketLoc, 2399 ParsedType Ty, 2400 SourceLocation RAngleBracketLoc, 2401 SourceLocation LParenLoc, 2402 Expr *E, 2403 SourceLocation RParenLoc); 2404 2405 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2406 tok::TokenKind Kind, 2407 TypeSourceInfo *Ty, 2408 Expr *E, 2409 SourceRange AngleBrackets, 2410 SourceRange Parens); 2411 2412 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2413 SourceLocation TypeidLoc, 2414 TypeSourceInfo *Operand, 2415 SourceLocation RParenLoc); 2416 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2417 SourceLocation TypeidLoc, 2418 Expr *Operand, 2419 SourceLocation RParenLoc); 2420 2421 /// ActOnCXXTypeid - Parse typeid( something ). 2422 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2423 SourceLocation LParenLoc, bool isType, 2424 void *TyOrExpr, 2425 SourceLocation RParenLoc); 2426 2427 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2428 SourceLocation TypeidLoc, 2429 TypeSourceInfo *Operand, 2430 SourceLocation RParenLoc); 2431 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2432 SourceLocation TypeidLoc, 2433 Expr *Operand, 2434 SourceLocation RParenLoc); 2435 2436 /// ActOnCXXUuidof - Parse __uuidof( something ). 2437 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2438 SourceLocation LParenLoc, bool isType, 2439 void *TyOrExpr, 2440 SourceLocation RParenLoc); 2441 2442 2443 //// ActOnCXXThis - Parse 'this' pointer. 2444 ExprResult ActOnCXXThis(SourceLocation loc); 2445 2446 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2447 /// pointer to an instance method whose 'this' pointer is 2448 /// capturable, or null if this is not possible. 2449 CXXMethodDecl *tryCaptureCXXThis(); 2450 2451 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2452 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2453 2454 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2455 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2456 2457 //// ActOnCXXThrow - Parse throw expressions. 2458 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2459 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E); 2460 2461 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2462 /// Can be interpreted either as function-style casting ("int(x)") 2463 /// or class type construction ("ClassType(x,y,z)") 2464 /// or creation of a value-initialized type ("int()"). 2465 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2466 SourceLocation LParenLoc, 2467 MultiExprArg Exprs, 2468 SourceLocation RParenLoc); 2469 2470 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2471 SourceLocation LParenLoc, 2472 MultiExprArg Exprs, 2473 SourceLocation RParenLoc); 2474 2475 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2476 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2477 SourceLocation PlacementLParen, 2478 MultiExprArg PlacementArgs, 2479 SourceLocation PlacementRParen, 2480 SourceRange TypeIdParens, Declarator &D, 2481 SourceLocation ConstructorLParen, 2482 MultiExprArg ConstructorArgs, 2483 SourceLocation ConstructorRParen); 2484 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2485 SourceLocation PlacementLParen, 2486 MultiExprArg PlacementArgs, 2487 SourceLocation PlacementRParen, 2488 SourceRange TypeIdParens, 2489 QualType AllocType, 2490 TypeSourceInfo *AllocTypeInfo, 2491 Expr *ArraySize, 2492 SourceLocation ConstructorLParen, 2493 MultiExprArg ConstructorArgs, 2494 SourceLocation ConstructorRParen, 2495 bool TypeMayContainAuto = true); 2496 2497 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2498 SourceRange R); 2499 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2500 bool UseGlobal, QualType AllocType, bool IsArray, 2501 Expr **PlaceArgs, unsigned NumPlaceArgs, 2502 FunctionDecl *&OperatorNew, 2503 FunctionDecl *&OperatorDelete); 2504 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2505 DeclarationName Name, Expr** Args, 2506 unsigned NumArgs, DeclContext *Ctx, 2507 bool AllowMissing, FunctionDecl *&Operator); 2508 void DeclareGlobalNewDelete(); 2509 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2510 QualType Argument, 2511 bool addMallocAttr = false); 2512 2513 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2514 DeclarationName Name, FunctionDecl* &Operator); 2515 2516 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2517 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2518 bool UseGlobal, bool ArrayForm, 2519 Expr *Operand); 2520 2521 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2522 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2523 SourceLocation StmtLoc, 2524 bool ConvertToBoolean); 2525 2526 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2527 Expr *Operand, SourceLocation RParen); 2528 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2529 SourceLocation RParen); 2530 2531 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2532 /// pseudo-functions. 2533 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2534 SourceLocation KWLoc, 2535 ParsedType Ty, 2536 SourceLocation RParen); 2537 2538 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2539 SourceLocation KWLoc, 2540 TypeSourceInfo *T, 2541 SourceLocation RParen); 2542 2543 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2544 /// pseudo-functions. 2545 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2546 SourceLocation KWLoc, 2547 ParsedType LhsTy, 2548 ParsedType RhsTy, 2549 SourceLocation RParen); 2550 2551 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2552 SourceLocation KWLoc, 2553 TypeSourceInfo *LhsT, 2554 TypeSourceInfo *RhsT, 2555 SourceLocation RParen); 2556 2557 ExprResult ActOnStartCXXMemberReference(Scope *S, 2558 Expr *Base, 2559 SourceLocation OpLoc, 2560 tok::TokenKind OpKind, 2561 ParsedType &ObjectType, 2562 bool &MayBePseudoDestructor); 2563 2564 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2565 2566 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2567 SourceLocation OpLoc, 2568 tok::TokenKind OpKind, 2569 const CXXScopeSpec &SS, 2570 TypeSourceInfo *ScopeType, 2571 SourceLocation CCLoc, 2572 SourceLocation TildeLoc, 2573 PseudoDestructorTypeStorage DestroyedType, 2574 bool HasTrailingLParen); 2575 2576 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2577 SourceLocation OpLoc, 2578 tok::TokenKind OpKind, 2579 CXXScopeSpec &SS, 2580 UnqualifiedId &FirstTypeName, 2581 SourceLocation CCLoc, 2582 SourceLocation TildeLoc, 2583 UnqualifiedId &SecondTypeName, 2584 bool HasTrailingLParen); 2585 2586 /// MaybeCreateExprWithCleanups - If the current full-expression 2587 /// requires any cleanups, surround it with a ExprWithCleanups node. 2588 /// Otherwise, just returns the passed-in expression. 2589 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2590 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2591 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2592 2593 ExprResult ActOnFinishFullExpr(Expr *Expr); 2594 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2595 2596 // Marks SS invalid if it represents an incomplete type. 2597 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2598 2599 DeclContext *computeDeclContext(QualType T); 2600 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2601 bool EnteringContext = false); 2602 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2603 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2604 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2605 2606 /// \brief The parser has parsed a global nested-name-specifier '::'. 2607 /// 2608 /// \param S The scope in which this nested-name-specifier occurs. 2609 /// 2610 /// \param CCLoc The location of the '::'. 2611 /// 2612 /// \param SS The nested-name-specifier, which will be updated in-place 2613 /// to reflect the parsed nested-name-specifier. 2614 /// 2615 /// \returns true if an error occurred, false otherwise. 2616 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2617 CXXScopeSpec &SS); 2618 2619 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2620 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2621 2622 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2623 SourceLocation IdLoc, 2624 IdentifierInfo &II, 2625 ParsedType ObjectType); 2626 2627 bool BuildCXXNestedNameSpecifier(Scope *S, 2628 IdentifierInfo &Identifier, 2629 SourceLocation IdentifierLoc, 2630 SourceLocation CCLoc, 2631 QualType ObjectType, 2632 bool EnteringContext, 2633 CXXScopeSpec &SS, 2634 NamedDecl *ScopeLookupResult, 2635 bool ErrorRecoveryLookup); 2636 2637 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2638 /// 2639 /// \param S The scope in which this nested-name-specifier occurs. 2640 /// 2641 /// \param Identifier The identifier preceding the '::'. 2642 /// 2643 /// \param IdentifierLoc The location of the identifier. 2644 /// 2645 /// \param CCLoc The location of the '::'. 2646 /// 2647 /// \param ObjectType The type of the object, if we're parsing 2648 /// nested-name-specifier in a member access expression. 2649 /// 2650 /// \param EnteringContext Whether we're entering the context nominated by 2651 /// this nested-name-specifier. 2652 /// 2653 /// \param SS The nested-name-specifier, which is both an input 2654 /// parameter (the nested-name-specifier before this type) and an 2655 /// output parameter (containing the full nested-name-specifier, 2656 /// including this new type). 2657 /// 2658 /// \returns true if an error occurred, false otherwise. 2659 bool ActOnCXXNestedNameSpecifier(Scope *S, 2660 IdentifierInfo &Identifier, 2661 SourceLocation IdentifierLoc, 2662 SourceLocation CCLoc, 2663 ParsedType ObjectType, 2664 bool EnteringContext, 2665 CXXScopeSpec &SS); 2666 2667 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2668 IdentifierInfo &Identifier, 2669 SourceLocation IdentifierLoc, 2670 SourceLocation ColonLoc, 2671 ParsedType ObjectType, 2672 bool EnteringContext); 2673 2674 /// \brief The parser has parsed a nested-name-specifier 2675 /// 'template[opt] template-name < template-args >::'. 2676 /// 2677 /// \param S The scope in which this nested-name-specifier occurs. 2678 /// 2679 /// \param TemplateLoc The location of the 'template' keyword, if any. 2680 /// 2681 /// \param SS The nested-name-specifier, which is both an input 2682 /// parameter (the nested-name-specifier before this type) and an 2683 /// output parameter (containing the full nested-name-specifier, 2684 /// including this new type). 2685 /// 2686 /// \param TemplateLoc the location of the 'template' keyword, if any. 2687 /// \param TemplateName The template name. 2688 /// \param TemplateNameLoc The location of the template name. 2689 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2690 /// \param TemplateArgs The template arguments. 2691 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2692 /// \param CCLoc The location of the '::'. 2693 2694 /// \param EnteringContext Whether we're entering the context of the 2695 /// nested-name-specifier. 2696 /// 2697 /// 2698 /// \returns true if an error occurred, false otherwise. 2699 bool ActOnCXXNestedNameSpecifier(Scope *S, 2700 SourceLocation TemplateLoc, 2701 CXXScopeSpec &SS, 2702 TemplateTy Template, 2703 SourceLocation TemplateNameLoc, 2704 SourceLocation LAngleLoc, 2705 ASTTemplateArgsPtr TemplateArgs, 2706 SourceLocation RAngleLoc, 2707 SourceLocation CCLoc, 2708 bool EnteringContext); 2709 2710 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2711 /// that the parser can use later to reconstruct the given 2712 /// nested-name-specifier. 2713 /// 2714 /// \param SS A nested-name-specifier. 2715 /// 2716 /// \returns A pointer containing all of the information in the 2717 /// nested-name-specifier \p SS. 2718 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2719 2720 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2721 /// the nested-name-specifier structure. 2722 /// 2723 /// \param Annotation The annotation pointer, produced by 2724 /// \c SaveNestedNameSpecifierAnnotation(). 2725 /// 2726 /// \param AnnotationRange The source range corresponding to the annotation. 2727 /// 2728 /// \param SS The nested-name-specifier that will be updated with the contents 2729 /// of the annotation pointer. 2730 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2731 SourceRange AnnotationRange, 2732 CXXScopeSpec &SS); 2733 2734 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2735 2736 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2737 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2738 /// After this method is called, according to [C++ 3.4.3p3], names should be 2739 /// looked up in the declarator-id's scope, until the declarator is parsed and 2740 /// ActOnCXXExitDeclaratorScope is called. 2741 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2742 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2743 2744 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2745 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2746 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2747 /// Used to indicate that names should revert to being looked up in the 2748 /// defining scope. 2749 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2750 2751 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2752 /// initializer for the declaration 'Dcl'. 2753 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2754 /// static data member of class X, names should be looked up in the scope of 2755 /// class X. 2756 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2757 2758 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2759 /// initializer for the declaration 'Dcl'. 2760 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2761 2762 // ParseObjCStringLiteral - Parse Objective-C string literals. 2763 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2764 Expr **Strings, 2765 unsigned NumStrings); 2766 2767 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2768 TypeSourceInfo *EncodedTypeInfo, 2769 SourceLocation RParenLoc); 2770 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2771 CXXMethodDecl *Method); 2772 2773 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2774 SourceLocation EncodeLoc, 2775 SourceLocation LParenLoc, 2776 ParsedType Ty, 2777 SourceLocation RParenLoc); 2778 2779 // ParseObjCSelectorExpression - Build selector expression for @selector 2780 ExprResult ParseObjCSelectorExpression(Selector Sel, 2781 SourceLocation AtLoc, 2782 SourceLocation SelLoc, 2783 SourceLocation LParenLoc, 2784 SourceLocation RParenLoc); 2785 2786 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2787 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2788 SourceLocation AtLoc, 2789 SourceLocation ProtoLoc, 2790 SourceLocation LParenLoc, 2791 SourceLocation RParenLoc); 2792 2793 //===--------------------------------------------------------------------===// 2794 // C++ Declarations 2795 // 2796 Decl *ActOnStartLinkageSpecification(Scope *S, 2797 SourceLocation ExternLoc, 2798 SourceLocation LangLoc, 2799 llvm::StringRef Lang, 2800 SourceLocation LBraceLoc); 2801 Decl *ActOnFinishLinkageSpecification(Scope *S, 2802 Decl *LinkageSpec, 2803 SourceLocation RBraceLoc); 2804 2805 2806 //===--------------------------------------------------------------------===// 2807 // C++ Classes 2808 // 2809 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2810 const CXXScopeSpec *SS = 0); 2811 2812 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2813 SourceLocation ASLoc, 2814 SourceLocation ColonLoc); 2815 2816 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2817 Declarator &D, 2818 MultiTemplateParamsArg TemplateParameterLists, 2819 Expr *BitfieldWidth, const VirtSpecifiers &VS, 2820 Expr *Init, bool IsDefinition, 2821 bool Deleted = false); 2822 2823 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2824 Scope *S, 2825 CXXScopeSpec &SS, 2826 IdentifierInfo *MemberOrBase, 2827 ParsedType TemplateTypeTy, 2828 SourceLocation IdLoc, 2829 SourceLocation LParenLoc, 2830 Expr **Args, unsigned NumArgs, 2831 SourceLocation RParenLoc, 2832 SourceLocation EllipsisLoc); 2833 2834 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2835 unsigned NumArgs, SourceLocation IdLoc, 2836 SourceLocation LParenLoc, 2837 SourceLocation RParenLoc); 2838 2839 MemInitResult BuildBaseInitializer(QualType BaseType, 2840 TypeSourceInfo *BaseTInfo, 2841 Expr **Args, unsigned NumArgs, 2842 SourceLocation LParenLoc, 2843 SourceLocation RParenLoc, 2844 CXXRecordDecl *ClassDecl, 2845 SourceLocation EllipsisLoc); 2846 2847 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 2848 Expr **Args, unsigned NumArgs, 2849 SourceLocation BaseLoc, 2850 SourceLocation RParenLoc, 2851 SourceLocation LParenLoc, 2852 CXXRecordDecl *ClassDecl); 2853 2854 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 2855 CXXCtorInitializer **Initializers, 2856 unsigned NumInitializers, bool AnyErrors); 2857 2858 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2859 2860 2861 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2862 /// mark all the non-trivial destructors of its members and bases as 2863 /// referenced. 2864 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2865 CXXRecordDecl *Record); 2866 2867 /// \brief The list of classes whose vtables have been used within 2868 /// this translation unit, and the source locations at which the 2869 /// first use occurred. 2870 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2871 2872 /// \brief The list of vtables that are required but have not yet been 2873 /// materialized. 2874 llvm::SmallVector<VTableUse, 16> VTableUses; 2875 2876 /// \brief The set of classes whose vtables have been used within 2877 /// this translation unit, and a bit that will be true if the vtable is 2878 /// required to be emitted (otherwise, it should be emitted only if needed 2879 /// by code generation). 2880 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2881 2882 /// \brief A list of all of the dynamic classes in this translation 2883 /// unit. 2884 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2885 2886 /// \brief Note that the vtable for the given class was used at the 2887 /// given location. 2888 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2889 bool DefinitionRequired = false); 2890 2891 /// MarkVirtualMembersReferenced - Will mark all members of the given 2892 /// CXXRecordDecl referenced. 2893 void MarkVirtualMembersReferenced(SourceLocation Loc, 2894 const CXXRecordDecl *RD); 2895 2896 /// \brief Define all of the vtables that have been used in this 2897 /// translation unit and reference any virtual members used by those 2898 /// vtables. 2899 /// 2900 /// \returns true if any work was done, false otherwise. 2901 bool DefineUsedVTables(); 2902 2903 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2904 2905 void ActOnMemInitializers(Decl *ConstructorDecl, 2906 SourceLocation ColonLoc, 2907 MemInitTy **MemInits, unsigned NumMemInits, 2908 bool AnyErrors); 2909 2910 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2911 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2912 Decl *TagDecl, 2913 SourceLocation LBrac, 2914 SourceLocation RBrac, 2915 AttributeList *AttrList); 2916 2917 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2918 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2919 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2920 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2921 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2922 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2923 2924 Decl *ActOnStaticAssertDeclaration(SourceLocation AssertLoc, 2925 Expr *AssertExpr, 2926 Expr *AssertMessageExpr); 2927 2928 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2929 TypeSourceInfo *TSInfo); 2930 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2931 MultiTemplateParamsArg TemplateParams); 2932 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2933 MultiTemplateParamsArg TemplateParams); 2934 2935 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2936 StorageClass& SC); 2937 void CheckConstructor(CXXConstructorDecl *Constructor); 2938 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2939 StorageClass& SC); 2940 bool CheckDestructor(CXXDestructorDecl *Destructor); 2941 void CheckConversionDeclarator(Declarator &D, QualType &R, 2942 StorageClass& SC); 2943 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2944 2945 //===--------------------------------------------------------------------===// 2946 // C++ Derived Classes 2947 // 2948 2949 /// ActOnBaseSpecifier - Parsed a base specifier 2950 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2951 SourceRange SpecifierRange, 2952 bool Virtual, AccessSpecifier Access, 2953 TypeSourceInfo *TInfo, 2954 SourceLocation EllipsisLoc); 2955 2956 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2957 SourceRange SpecifierRange, 2958 bool Virtual, AccessSpecifier Access, 2959 ParsedType basetype, 2960 SourceLocation BaseLoc, 2961 SourceLocation EllipsisLoc); 2962 2963 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2964 unsigned NumBases); 2965 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 2966 2967 bool IsDerivedFrom(QualType Derived, QualType Base); 2968 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 2969 2970 // FIXME: I don't like this name. 2971 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 2972 2973 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 2974 2975 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2976 SourceLocation Loc, SourceRange Range, 2977 CXXCastPath *BasePath = 0, 2978 bool IgnoreAccess = false); 2979 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2980 unsigned InaccessibleBaseID, 2981 unsigned AmbigiousBaseConvID, 2982 SourceLocation Loc, SourceRange Range, 2983 DeclarationName Name, 2984 CXXCastPath *BasePath); 2985 2986 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 2987 2988 /// CheckOverridingFunctionReturnType - Checks whether the return types are 2989 /// covariant, according to C++ [class.virtual]p5. 2990 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 2991 const CXXMethodDecl *Old); 2992 2993 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 2994 /// spec is a subset of base spec. 2995 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 2996 const CXXMethodDecl *Old); 2997 2998 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 2999 3000 /// CheckOverrideControl - Check C++0x override control semantics. 3001 void CheckOverrideControl(const Decl *D); 3002 3003 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3004 /// overrides a virtual member function marked 'final', according to 3005 /// C++0x [class.virtual]p3. 3006 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3007 const CXXMethodDecl *Old); 3008 3009 3010 //===--------------------------------------------------------------------===// 3011 // C++ Access Control 3012 // 3013 3014 enum AccessResult { 3015 AR_accessible, 3016 AR_inaccessible, 3017 AR_dependent, 3018 AR_delayed 3019 }; 3020 3021 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3022 NamedDecl *PrevMemberDecl, 3023 AccessSpecifier LexicalAS); 3024 3025 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3026 DeclAccessPair FoundDecl); 3027 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3028 DeclAccessPair FoundDecl); 3029 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3030 SourceRange PlacementRange, 3031 CXXRecordDecl *NamingClass, 3032 DeclAccessPair FoundDecl); 3033 AccessResult CheckConstructorAccess(SourceLocation Loc, 3034 CXXConstructorDecl *D, 3035 const InitializedEntity &Entity, 3036 AccessSpecifier Access, 3037 bool IsCopyBindingRefToTemp = false); 3038 AccessResult CheckDestructorAccess(SourceLocation Loc, 3039 CXXDestructorDecl *Dtor, 3040 const PartialDiagnostic &PDiag); 3041 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3042 NamedDecl *D, 3043 const PartialDiagnostic &PDiag); 3044 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3045 Expr *ObjectExpr, 3046 Expr *ArgExpr, 3047 DeclAccessPair FoundDecl); 3048 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3049 DeclAccessPair FoundDecl); 3050 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3051 QualType Base, QualType Derived, 3052 const CXXBasePath &Path, 3053 unsigned DiagID, 3054 bool ForceCheck = false, 3055 bool ForceUnprivileged = false); 3056 void CheckLookupAccess(const LookupResult &R); 3057 3058 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3059 const MultiLevelTemplateArgumentList &TemplateArgs); 3060 void PerformDependentDiagnostics(const DeclContext *Pattern, 3061 const MultiLevelTemplateArgumentList &TemplateArgs); 3062 3063 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3064 3065 /// A flag to suppress access checking. 3066 bool SuppressAccessChecking; 3067 3068 /// \brief When true, access checking violations are treated as SFINAE 3069 /// failures rather than hard errors. 3070 bool AccessCheckingSFINAE; 3071 3072 void ActOnStartSuppressingAccessChecks(); 3073 void ActOnStopSuppressingAccessChecks(); 3074 3075 enum AbstractDiagSelID { 3076 AbstractNone = -1, 3077 AbstractReturnType, 3078 AbstractParamType, 3079 AbstractVariableType, 3080 AbstractFieldType, 3081 AbstractArrayType 3082 }; 3083 3084 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3085 const PartialDiagnostic &PD); 3086 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3087 3088 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3089 AbstractDiagSelID SelID = AbstractNone); 3090 3091 //===--------------------------------------------------------------------===// 3092 // C++ Overloaded Operators [C++ 13.5] 3093 // 3094 3095 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3096 3097 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3098 3099 //===--------------------------------------------------------------------===// 3100 // C++ Templates [C++ 14] 3101 // 3102 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3103 QualType ObjectType, bool EnteringContext, 3104 bool &MemberOfUnknownSpecialization); 3105 3106 TemplateNameKind isTemplateName(Scope *S, 3107 CXXScopeSpec &SS, 3108 bool hasTemplateKeyword, 3109 UnqualifiedId &Name, 3110 ParsedType ObjectType, 3111 bool EnteringContext, 3112 TemplateTy &Template, 3113 bool &MemberOfUnknownSpecialization); 3114 3115 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3116 SourceLocation IILoc, 3117 Scope *S, 3118 const CXXScopeSpec *SS, 3119 TemplateTy &SuggestedTemplate, 3120 TemplateNameKind &SuggestedKind); 3121 3122 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3123 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3124 3125 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3126 SourceLocation EllipsisLoc, 3127 SourceLocation KeyLoc, 3128 IdentifierInfo *ParamName, 3129 SourceLocation ParamNameLoc, 3130 unsigned Depth, unsigned Position, 3131 SourceLocation EqualLoc, 3132 ParsedType DefaultArg); 3133 3134 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3135 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3136 unsigned Depth, 3137 unsigned Position, 3138 SourceLocation EqualLoc, 3139 Expr *DefaultArg); 3140 Decl *ActOnTemplateTemplateParameter(Scope *S, 3141 SourceLocation TmpLoc, 3142 TemplateParamsTy *Params, 3143 SourceLocation EllipsisLoc, 3144 IdentifierInfo *ParamName, 3145 SourceLocation ParamNameLoc, 3146 unsigned Depth, 3147 unsigned Position, 3148 SourceLocation EqualLoc, 3149 ParsedTemplateArgument DefaultArg); 3150 3151 TemplateParamsTy * 3152 ActOnTemplateParameterList(unsigned Depth, 3153 SourceLocation ExportLoc, 3154 SourceLocation TemplateLoc, 3155 SourceLocation LAngleLoc, 3156 Decl **Params, unsigned NumParams, 3157 SourceLocation RAngleLoc); 3158 3159 /// \brief The context in which we are checking a template parameter 3160 /// list. 3161 enum TemplateParamListContext { 3162 TPC_ClassTemplate, 3163 TPC_FunctionTemplate, 3164 TPC_ClassTemplateMember, 3165 TPC_FriendFunctionTemplate, 3166 TPC_FriendFunctionTemplateDefinition 3167 }; 3168 3169 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3170 TemplateParameterList *OldParams, 3171 TemplateParamListContext TPC); 3172 TemplateParameterList * 3173 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3174 const CXXScopeSpec &SS, 3175 TemplateParameterList **ParamLists, 3176 unsigned NumParamLists, 3177 bool IsFriend, 3178 bool &IsExplicitSpecialization, 3179 bool &Invalid); 3180 3181 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3182 SourceLocation KWLoc, CXXScopeSpec &SS, 3183 IdentifierInfo *Name, SourceLocation NameLoc, 3184 AttributeList *Attr, 3185 TemplateParameterList *TemplateParams, 3186 AccessSpecifier AS); 3187 3188 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3189 TemplateArgumentListInfo &Out); 3190 3191 void NoteAllFoundTemplates(TemplateName Name); 3192 3193 QualType CheckTemplateIdType(TemplateName Template, 3194 SourceLocation TemplateLoc, 3195 TemplateArgumentListInfo &TemplateArgs); 3196 3197 TypeResult 3198 ActOnTemplateIdType(CXXScopeSpec &SS, 3199 TemplateTy Template, SourceLocation TemplateLoc, 3200 SourceLocation LAngleLoc, 3201 ASTTemplateArgsPtr TemplateArgs, 3202 SourceLocation RAngleLoc); 3203 3204 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3205 /// such as \c class T::template apply<U>. 3206 /// 3207 /// \param TUK 3208 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3209 TypeSpecifierType TagSpec, 3210 SourceLocation TagLoc, 3211 CXXScopeSpec &SS, 3212 TemplateTy TemplateD, 3213 SourceLocation TemplateLoc, 3214 SourceLocation LAngleLoc, 3215 ASTTemplateArgsPtr TemplateArgsIn, 3216 SourceLocation RAngleLoc); 3217 3218 3219 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3220 LookupResult &R, 3221 bool RequiresADL, 3222 const TemplateArgumentListInfo &TemplateArgs); 3223 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3224 const DeclarationNameInfo &NameInfo, 3225 const TemplateArgumentListInfo &TemplateArgs); 3226 3227 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3228 SourceLocation TemplateKWLoc, 3229 CXXScopeSpec &SS, 3230 UnqualifiedId &Name, 3231 ParsedType ObjectType, 3232 bool EnteringContext, 3233 TemplateTy &Template); 3234 3235 DeclResult 3236 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3237 SourceLocation KWLoc, 3238 CXXScopeSpec &SS, 3239 TemplateTy Template, 3240 SourceLocation TemplateNameLoc, 3241 SourceLocation LAngleLoc, 3242 ASTTemplateArgsPtr TemplateArgs, 3243 SourceLocation RAngleLoc, 3244 AttributeList *Attr, 3245 MultiTemplateParamsArg TemplateParameterLists); 3246 3247 Decl *ActOnTemplateDeclarator(Scope *S, 3248 MultiTemplateParamsArg TemplateParameterLists, 3249 Declarator &D); 3250 3251 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3252 MultiTemplateParamsArg TemplateParameterLists, 3253 Declarator &D); 3254 3255 bool 3256 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3257 TemplateSpecializationKind NewTSK, 3258 NamedDecl *PrevDecl, 3259 TemplateSpecializationKind PrevTSK, 3260 SourceLocation PrevPtOfInstantiation, 3261 bool &SuppressNew); 3262 3263 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3264 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3265 LookupResult &Previous); 3266 3267 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3268 TemplateArgumentListInfo *ExplicitTemplateArgs, 3269 LookupResult &Previous); 3270 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3271 3272 DeclResult 3273 ActOnExplicitInstantiation(Scope *S, 3274 SourceLocation ExternLoc, 3275 SourceLocation TemplateLoc, 3276 unsigned TagSpec, 3277 SourceLocation KWLoc, 3278 const CXXScopeSpec &SS, 3279 TemplateTy Template, 3280 SourceLocation TemplateNameLoc, 3281 SourceLocation LAngleLoc, 3282 ASTTemplateArgsPtr TemplateArgs, 3283 SourceLocation RAngleLoc, 3284 AttributeList *Attr); 3285 3286 DeclResult 3287 ActOnExplicitInstantiation(Scope *S, 3288 SourceLocation ExternLoc, 3289 SourceLocation TemplateLoc, 3290 unsigned TagSpec, 3291 SourceLocation KWLoc, 3292 CXXScopeSpec &SS, 3293 IdentifierInfo *Name, 3294 SourceLocation NameLoc, 3295 AttributeList *Attr); 3296 3297 DeclResult ActOnExplicitInstantiation(Scope *S, 3298 SourceLocation ExternLoc, 3299 SourceLocation TemplateLoc, 3300 Declarator &D); 3301 3302 TemplateArgumentLoc 3303 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3304 SourceLocation TemplateLoc, 3305 SourceLocation RAngleLoc, 3306 Decl *Param, 3307 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3308 3309 /// \brief Specifies the context in which a particular template 3310 /// argument is being checked. 3311 enum CheckTemplateArgumentKind { 3312 /// \brief The template argument was specified in the code or was 3313 /// instantiated with some deduced template arguments. 3314 CTAK_Specified, 3315 3316 /// \brief The template argument was deduced via template argument 3317 /// deduction. 3318 CTAK_Deduced, 3319 3320 /// \brief The template argument was deduced from an array bound 3321 /// via template argument deduction. 3322 CTAK_DeducedFromArrayBound 3323 }; 3324 3325 bool CheckTemplateArgument(NamedDecl *Param, 3326 const TemplateArgumentLoc &Arg, 3327 NamedDecl *Template, 3328 SourceLocation TemplateLoc, 3329 SourceLocation RAngleLoc, 3330 unsigned ArgumentPackIndex, 3331 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3332 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3333 3334 /// \brief Check that the given template arguments can be be provided to 3335 /// the given template, converting the arguments along the way. 3336 /// 3337 /// \param Template The template to which the template arguments are being 3338 /// provided. 3339 /// 3340 /// \param TemplateLoc The location of the template name in the source. 3341 /// 3342 /// \param TemplateArgs The list of template arguments. If the template is 3343 /// a template template parameter, this function may extend the set of 3344 /// template arguments to also include substituted, defaulted template 3345 /// arguments. 3346 /// 3347 /// \param PartialTemplateArgs True if the list of template arguments is 3348 /// intentionally partial, e.g., because we're checking just the initial 3349 /// set of template arguments. 3350 /// 3351 /// \param Converted Will receive the converted, canonicalized template 3352 /// arguments. 3353 /// 3354 /// \returns True if an error occurred, false otherwise. 3355 bool CheckTemplateArgumentList(TemplateDecl *Template, 3356 SourceLocation TemplateLoc, 3357 TemplateArgumentListInfo &TemplateArgs, 3358 bool PartialTemplateArgs, 3359 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3360 3361 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3362 const TemplateArgumentLoc &Arg, 3363 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3364 3365 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3366 TypeSourceInfo *Arg); 3367 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3368 TemplateArgument &Converted); 3369 bool CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3370 QualType InstantiatedParamType, Expr *&Arg, 3371 TemplateArgument &Converted, 3372 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3373 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3374 const TemplateArgumentLoc &Arg); 3375 3376 ExprResult 3377 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3378 QualType ParamType, 3379 SourceLocation Loc); 3380 ExprResult 3381 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3382 SourceLocation Loc); 3383 3384 /// \brief Enumeration describing how template parameter lists are compared 3385 /// for equality. 3386 enum TemplateParameterListEqualKind { 3387 /// \brief We are matching the template parameter lists of two templates 3388 /// that might be redeclarations. 3389 /// 3390 /// \code 3391 /// template<typename T> struct X; 3392 /// template<typename T> struct X; 3393 /// \endcode 3394 TPL_TemplateMatch, 3395 3396 /// \brief We are matching the template parameter lists of two template 3397 /// template parameters as part of matching the template parameter lists 3398 /// of two templates that might be redeclarations. 3399 /// 3400 /// \code 3401 /// template<template<int I> class TT> struct X; 3402 /// template<template<int Value> class Other> struct X; 3403 /// \endcode 3404 TPL_TemplateTemplateParmMatch, 3405 3406 /// \brief We are matching the template parameter lists of a template 3407 /// template argument against the template parameter lists of a template 3408 /// template parameter. 3409 /// 3410 /// \code 3411 /// template<template<int Value> class Metafun> struct X; 3412 /// template<int Value> struct integer_c; 3413 /// X<integer_c> xic; 3414 /// \endcode 3415 TPL_TemplateTemplateArgumentMatch 3416 }; 3417 3418 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3419 TemplateParameterList *Old, 3420 bool Complain, 3421 TemplateParameterListEqualKind Kind, 3422 SourceLocation TemplateArgLoc 3423 = SourceLocation()); 3424 3425 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3426 3427 /// \brief Called when the parser has parsed a C++ typename 3428 /// specifier, e.g., "typename T::type". 3429 /// 3430 /// \param S The scope in which this typename type occurs. 3431 /// \param TypenameLoc the location of the 'typename' keyword 3432 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3433 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3434 /// \param IdLoc the location of the identifier. 3435 TypeResult 3436 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3437 const CXXScopeSpec &SS, const IdentifierInfo &II, 3438 SourceLocation IdLoc); 3439 3440 /// \brief Called when the parser has parsed a C++ typename 3441 /// specifier that ends in a template-id, e.g., 3442 /// "typename MetaFun::template apply<T1, T2>". 3443 /// 3444 /// \param S The scope in which this typename type occurs. 3445 /// \param TypenameLoc the location of the 'typename' keyword 3446 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3447 /// \param TemplateLoc the location of the 'template' keyword, if any. 3448 /// \param TemplateName The template name. 3449 /// \param TemplateNameLoc The location of the template name. 3450 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3451 /// \param TemplateArgs The template arguments. 3452 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3453 TypeResult 3454 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3455 const CXXScopeSpec &SS, 3456 SourceLocation TemplateLoc, 3457 TemplateTy Template, 3458 SourceLocation TemplateNameLoc, 3459 SourceLocation LAngleLoc, 3460 ASTTemplateArgsPtr TemplateArgs, 3461 SourceLocation RAngleLoc); 3462 3463 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3464 SourceLocation KeywordLoc, 3465 NestedNameSpecifierLoc QualifierLoc, 3466 const IdentifierInfo &II, 3467 SourceLocation IILoc); 3468 3469 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3470 SourceLocation Loc, 3471 DeclarationName Name); 3472 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3473 3474 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3475 3476 std::string 3477 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3478 const TemplateArgumentList &Args); 3479 3480 std::string 3481 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3482 const TemplateArgument *Args, 3483 unsigned NumArgs); 3484 3485 //===--------------------------------------------------------------------===// 3486 // C++ Variadic Templates (C++0x [temp.variadic]) 3487 //===--------------------------------------------------------------------===// 3488 3489 /// \brief The context in which an unexpanded parameter pack is 3490 /// being diagnosed. 3491 /// 3492 /// Note that the values of this enumeration line up with the first 3493 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3494 enum UnexpandedParameterPackContext { 3495 /// \brief An arbitrary expression. 3496 UPPC_Expression = 0, 3497 3498 /// \brief The base type of a class type. 3499 UPPC_BaseType, 3500 3501 /// \brief The type of an arbitrary declaration. 3502 UPPC_DeclarationType, 3503 3504 /// \brief The type of a data member. 3505 UPPC_DataMemberType, 3506 3507 /// \brief The size of a bit-field. 3508 UPPC_BitFieldWidth, 3509 3510 /// \brief The expression in a static assertion. 3511 UPPC_StaticAssertExpression, 3512 3513 /// \brief The fixed underlying type of an enumeration. 3514 UPPC_FixedUnderlyingType, 3515 3516 /// \brief The enumerator value. 3517 UPPC_EnumeratorValue, 3518 3519 /// \brief A using declaration. 3520 UPPC_UsingDeclaration, 3521 3522 /// \brief A friend declaration. 3523 UPPC_FriendDeclaration, 3524 3525 /// \brief A declaration qualifier. 3526 UPPC_DeclarationQualifier, 3527 3528 /// \brief An initializer. 3529 UPPC_Initializer, 3530 3531 /// \brief A default argument. 3532 UPPC_DefaultArgument, 3533 3534 /// \brief The type of a non-type template parameter. 3535 UPPC_NonTypeTemplateParameterType, 3536 3537 /// \brief The type of an exception. 3538 UPPC_ExceptionType, 3539 3540 /// \brief Partial specialization. 3541 UPPC_PartialSpecialization 3542 }; 3543 3544 /// \brief If the given type contains an unexpanded parameter pack, 3545 /// diagnose the error. 3546 /// 3547 /// \param Loc The source location where a diagnostc should be emitted. 3548 /// 3549 /// \param T The type that is being checked for unexpanded parameter 3550 /// packs. 3551 /// 3552 /// \returns true if an error ocurred, false otherwise. 3553 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3554 UnexpandedParameterPackContext UPPC); 3555 3556 /// \brief If the given expression contains an unexpanded parameter 3557 /// pack, diagnose the error. 3558 /// 3559 /// \param E The expression that is being checked for unexpanded 3560 /// parameter packs. 3561 /// 3562 /// \returns true if an error ocurred, false otherwise. 3563 bool DiagnoseUnexpandedParameterPack(Expr *E, 3564 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3565 3566 /// \brief If the given nested-name-specifier contains an unexpanded 3567 /// parameter pack, diagnose the error. 3568 /// 3569 /// \param SS The nested-name-specifier that is being checked for 3570 /// unexpanded parameter packs. 3571 /// 3572 /// \returns true if an error ocurred, false otherwise. 3573 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3574 UnexpandedParameterPackContext UPPC); 3575 3576 /// \brief If the given name contains an unexpanded parameter pack, 3577 /// diagnose the error. 3578 /// 3579 /// \param NameInfo The name (with source location information) that 3580 /// is being checked for unexpanded parameter packs. 3581 /// 3582 /// \returns true if an error ocurred, false otherwise. 3583 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3584 UnexpandedParameterPackContext UPPC); 3585 3586 /// \brief If the given template name contains an unexpanded parameter pack, 3587 /// diagnose the error. 3588 /// 3589 /// \param Loc The location of the template name. 3590 /// 3591 /// \param Template The template name that is being checked for unexpanded 3592 /// parameter packs. 3593 /// 3594 /// \returns true if an error ocurred, false otherwise. 3595 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3596 TemplateName Template, 3597 UnexpandedParameterPackContext UPPC); 3598 3599 /// \brief If the given template argument contains an unexpanded parameter 3600 /// pack, diagnose the error. 3601 /// 3602 /// \param Arg The template argument that is being checked for unexpanded 3603 /// parameter packs. 3604 /// 3605 /// \returns true if an error ocurred, false otherwise. 3606 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3607 UnexpandedParameterPackContext UPPC); 3608 3609 /// \brief Collect the set of unexpanded parameter packs within the given 3610 /// template argument. 3611 /// 3612 /// \param Arg The template argument that will be traversed to find 3613 /// unexpanded parameter packs. 3614 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3615 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3616 3617 /// \brief Collect the set of unexpanded parameter packs within the given 3618 /// template argument. 3619 /// 3620 /// \param Arg The template argument that will be traversed to find 3621 /// unexpanded parameter packs. 3622 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3623 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3624 3625 /// \brief Collect the set of unexpanded parameter packs within the given 3626 /// type. 3627 /// 3628 /// \param T The type that will be traversed to find 3629 /// unexpanded parameter packs. 3630 void collectUnexpandedParameterPacks(QualType T, 3631 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3632 3633 /// \brief Collect the set of unexpanded parameter packs within the given 3634 /// type. 3635 /// 3636 /// \param TL The type that will be traversed to find 3637 /// unexpanded parameter packs. 3638 void collectUnexpandedParameterPacks(TypeLoc TL, 3639 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3640 3641 /// \brief Invoked when parsing a template argument followed by an 3642 /// ellipsis, which creates a pack expansion. 3643 /// 3644 /// \param Arg The template argument preceding the ellipsis, which 3645 /// may already be invalid. 3646 /// 3647 /// \param EllipsisLoc The location of the ellipsis. 3648 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3649 SourceLocation EllipsisLoc); 3650 3651 /// \brief Invoked when parsing a type followed by an ellipsis, which 3652 /// creates a pack expansion. 3653 /// 3654 /// \param Type The type preceding the ellipsis, which will become 3655 /// the pattern of the pack expansion. 3656 /// 3657 /// \param EllipsisLoc The location of the ellipsis. 3658 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3659 3660 /// \brief Construct a pack expansion type from the pattern of the pack 3661 /// expansion. 3662 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3663 SourceLocation EllipsisLoc, 3664 llvm::Optional<unsigned> NumExpansions); 3665 3666 /// \brief Construct a pack expansion type from the pattern of the pack 3667 /// expansion. 3668 QualType CheckPackExpansion(QualType Pattern, 3669 SourceRange PatternRange, 3670 SourceLocation EllipsisLoc, 3671 llvm::Optional<unsigned> NumExpansions); 3672 3673 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3674 /// creates a pack expansion. 3675 /// 3676 /// \param Pattern The expression preceding the ellipsis, which will become 3677 /// the pattern of the pack expansion. 3678 /// 3679 /// \param EllipsisLoc The location of the ellipsis. 3680 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3681 3682 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3683 /// creates a pack expansion. 3684 /// 3685 /// \param Pattern The expression preceding the ellipsis, which will become 3686 /// the pattern of the pack expansion. 3687 /// 3688 /// \param EllipsisLoc The location of the ellipsis. 3689 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3690 llvm::Optional<unsigned> NumExpansions); 3691 3692 /// \brief Determine whether we could expand a pack expansion with the 3693 /// given set of parameter packs into separate arguments by repeatedly 3694 /// transforming the pattern. 3695 /// 3696 /// \param EllipsisLoc The location of the ellipsis that identifies the 3697 /// pack expansion. 3698 /// 3699 /// \param PatternRange The source range that covers the entire pattern of 3700 /// the pack expansion. 3701 /// 3702 /// \param Unexpanded The set of unexpanded parameter packs within the 3703 /// pattern. 3704 /// 3705 /// \param NumUnexpanded The number of unexpanded parameter packs in 3706 /// \p Unexpanded. 3707 /// 3708 /// \param ShouldExpand Will be set to \c true if the transformer should 3709 /// expand the corresponding pack expansions into separate arguments. When 3710 /// set, \c NumExpansions must also be set. 3711 /// 3712 /// \param RetainExpansion Whether the caller should add an unexpanded 3713 /// pack expansion after all of the expanded arguments. This is used 3714 /// when extending explicitly-specified template argument packs per 3715 /// C++0x [temp.arg.explicit]p9. 3716 /// 3717 /// \param NumExpansions The number of separate arguments that will be in 3718 /// the expanded form of the corresponding pack expansion. This is both an 3719 /// input and an output parameter, which can be set by the caller if the 3720 /// number of expansions is known a priori (e.g., due to a prior substitution) 3721 /// and will be set by the callee when the number of expansions is known. 3722 /// The callee must set this value when \c ShouldExpand is \c true; it may 3723 /// set this value in other cases. 3724 /// 3725 /// \returns true if an error occurred (e.g., because the parameter packs 3726 /// are to be instantiated with arguments of different lengths), false 3727 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3728 /// must be set. 3729 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3730 SourceRange PatternRange, 3731 const UnexpandedParameterPack *Unexpanded, 3732 unsigned NumUnexpanded, 3733 const MultiLevelTemplateArgumentList &TemplateArgs, 3734 bool &ShouldExpand, 3735 bool &RetainExpansion, 3736 llvm::Optional<unsigned> &NumExpansions); 3737 3738 /// \brief Determine the number of arguments in the given pack expansion 3739 /// type. 3740 /// 3741 /// This routine already assumes that the pack expansion type can be 3742 /// expanded and that the number of arguments in the expansion is 3743 /// consistent across all of the unexpanded parameter packs in its pattern. 3744 unsigned getNumArgumentsInExpansion(QualType T, 3745 const MultiLevelTemplateArgumentList &TemplateArgs); 3746 3747 /// \brief Determine whether the given declarator contains any unexpanded 3748 /// parameter packs. 3749 /// 3750 /// This routine is used by the parser to disambiguate function declarators 3751 /// with an ellipsis prior to the ')', e.g., 3752 /// 3753 /// \code 3754 /// void f(T...); 3755 /// \endcode 3756 /// 3757 /// To determine whether we have an (unnamed) function parameter pack or 3758 /// a variadic function. 3759 /// 3760 /// \returns true if the declarator contains any unexpanded parameter packs, 3761 /// false otherwise. 3762 bool containsUnexpandedParameterPacks(Declarator &D); 3763 3764 //===--------------------------------------------------------------------===// 3765 // C++ Template Argument Deduction (C++ [temp.deduct]) 3766 //===--------------------------------------------------------------------===// 3767 3768 /// \brief Describes the result of template argument deduction. 3769 /// 3770 /// The TemplateDeductionResult enumeration describes the result of 3771 /// template argument deduction, as returned from 3772 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3773 /// structure provides additional information about the results of 3774 /// template argument deduction, e.g., the deduced template argument 3775 /// list (if successful) or the specific template parameters or 3776 /// deduced arguments that were involved in the failure. 3777 enum TemplateDeductionResult { 3778 /// \brief Template argument deduction was successful. 3779 TDK_Success = 0, 3780 /// \brief Template argument deduction exceeded the maximum template 3781 /// instantiation depth (which has already been diagnosed). 3782 TDK_InstantiationDepth, 3783 /// \brief Template argument deduction did not deduce a value 3784 /// for every template parameter. 3785 TDK_Incomplete, 3786 /// \brief Template argument deduction produced inconsistent 3787 /// deduced values for the given template parameter. 3788 TDK_Inconsistent, 3789 /// \brief Template argument deduction failed due to inconsistent 3790 /// cv-qualifiers on a template parameter type that would 3791 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3792 /// but were given a non-const "X". 3793 TDK_Underqualified, 3794 /// \brief Substitution of the deduced template argument values 3795 /// resulted in an error. 3796 TDK_SubstitutionFailure, 3797 /// \brief Substitution of the deduced template argument values 3798 /// into a non-deduced context produced a type or value that 3799 /// produces a type that does not match the original template 3800 /// arguments provided. 3801 TDK_NonDeducedMismatch, 3802 /// \brief When performing template argument deduction for a function 3803 /// template, there were too many call arguments. 3804 TDK_TooManyArguments, 3805 /// \brief When performing template argument deduction for a function 3806 /// template, there were too few call arguments. 3807 TDK_TooFewArguments, 3808 /// \brief The explicitly-specified template arguments were not valid 3809 /// template arguments for the given template. 3810 TDK_InvalidExplicitArguments, 3811 /// \brief The arguments included an overloaded function name that could 3812 /// not be resolved to a suitable function. 3813 TDK_FailedOverloadResolution 3814 }; 3815 3816 TemplateDeductionResult 3817 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3818 const TemplateArgumentList &TemplateArgs, 3819 sema::TemplateDeductionInfo &Info); 3820 3821 TemplateDeductionResult 3822 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3823 TemplateArgumentListInfo &ExplicitTemplateArgs, 3824 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3825 llvm::SmallVectorImpl<QualType> &ParamTypes, 3826 QualType *FunctionType, 3827 sema::TemplateDeductionInfo &Info); 3828 3829 TemplateDeductionResult 3830 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3831 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3832 unsigned NumExplicitlySpecified, 3833 FunctionDecl *&Specialization, 3834 sema::TemplateDeductionInfo &Info); 3835 3836 TemplateDeductionResult 3837 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3838 TemplateArgumentListInfo *ExplicitTemplateArgs, 3839 Expr **Args, unsigned NumArgs, 3840 FunctionDecl *&Specialization, 3841 sema::TemplateDeductionInfo &Info); 3842 3843 TemplateDeductionResult 3844 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3845 TemplateArgumentListInfo *ExplicitTemplateArgs, 3846 QualType ArgFunctionType, 3847 FunctionDecl *&Specialization, 3848 sema::TemplateDeductionInfo &Info); 3849 3850 TemplateDeductionResult 3851 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3852 QualType ToType, 3853 CXXConversionDecl *&Specialization, 3854 sema::TemplateDeductionInfo &Info); 3855 3856 TemplateDeductionResult 3857 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3858 TemplateArgumentListInfo *ExplicitTemplateArgs, 3859 FunctionDecl *&Specialization, 3860 sema::TemplateDeductionInfo &Info); 3861 3862 bool DeduceAutoType(QualType AutoType, Expr *Initializer, QualType &Result); 3863 3864 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3865 FunctionTemplateDecl *FT2, 3866 SourceLocation Loc, 3867 TemplatePartialOrderingContext TPOC, 3868 unsigned NumCallArguments); 3869 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3870 UnresolvedSetIterator SEnd, 3871 TemplatePartialOrderingContext TPOC, 3872 unsigned NumCallArguments, 3873 SourceLocation Loc, 3874 const PartialDiagnostic &NoneDiag, 3875 const PartialDiagnostic &AmbigDiag, 3876 const PartialDiagnostic &CandidateDiag, 3877 bool Complain = true); 3878 3879 ClassTemplatePartialSpecializationDecl * 3880 getMoreSpecializedPartialSpecialization( 3881 ClassTemplatePartialSpecializationDecl *PS1, 3882 ClassTemplatePartialSpecializationDecl *PS2, 3883 SourceLocation Loc); 3884 3885 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3886 bool OnlyDeduced, 3887 unsigned Depth, 3888 llvm::SmallVectorImpl<bool> &Used); 3889 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3890 llvm::SmallVectorImpl<bool> &Deduced); 3891 3892 //===--------------------------------------------------------------------===// 3893 // C++ Template Instantiation 3894 // 3895 3896 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3897 const TemplateArgumentList *Innermost = 0, 3898 bool RelativeToPrimary = false, 3899 const FunctionDecl *Pattern = 0); 3900 3901 /// \brief A template instantiation that is currently in progress. 3902 struct ActiveTemplateInstantiation { 3903 /// \brief The kind of template instantiation we are performing 3904 enum InstantiationKind { 3905 /// We are instantiating a template declaration. The entity is 3906 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3907 TemplateInstantiation, 3908 3909 /// We are instantiating a default argument for a template 3910 /// parameter. The Entity is the template, and 3911 /// TemplateArgs/NumTemplateArguments provides the template 3912 /// arguments as specified. 3913 /// FIXME: Use a TemplateArgumentList 3914 DefaultTemplateArgumentInstantiation, 3915 3916 /// We are instantiating a default argument for a function. 3917 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3918 /// provides the template arguments as specified. 3919 DefaultFunctionArgumentInstantiation, 3920 3921 /// We are substituting explicit template arguments provided for 3922 /// a function template. The entity is a FunctionTemplateDecl. 3923 ExplicitTemplateArgumentSubstitution, 3924 3925 /// We are substituting template argument determined as part of 3926 /// template argument deduction for either a class template 3927 /// partial specialization or a function template. The 3928 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3929 /// a FunctionTemplateDecl. 3930 DeducedTemplateArgumentSubstitution, 3931 3932 /// We are substituting prior template arguments into a new 3933 /// template parameter. The template parameter itself is either a 3934 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3935 PriorTemplateArgumentSubstitution, 3936 3937 /// We are checking the validity of a default template argument that 3938 /// has been used when naming a template-id. 3939 DefaultTemplateArgumentChecking 3940 } Kind; 3941 3942 /// \brief The point of instantiation within the source code. 3943 SourceLocation PointOfInstantiation; 3944 3945 /// \brief The template (or partial specialization) in which we are 3946 /// performing the instantiation, for substitutions of prior template 3947 /// arguments. 3948 NamedDecl *Template; 3949 3950 /// \brief The entity that is being instantiated. 3951 uintptr_t Entity; 3952 3953 /// \brief The list of template arguments we are substituting, if they 3954 /// are not part of the entity. 3955 const TemplateArgument *TemplateArgs; 3956 3957 /// \brief The number of template arguments in TemplateArgs. 3958 unsigned NumTemplateArgs; 3959 3960 /// \brief The template deduction info object associated with the 3961 /// substitution or checking of explicit or deduced template arguments. 3962 sema::TemplateDeductionInfo *DeductionInfo; 3963 3964 /// \brief The source range that covers the construct that cause 3965 /// the instantiation, e.g., the template-id that causes a class 3966 /// template instantiation. 3967 SourceRange InstantiationRange; 3968 3969 ActiveTemplateInstantiation() 3970 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 3971 NumTemplateArgs(0), DeductionInfo(0) {} 3972 3973 /// \brief Determines whether this template is an actual instantiation 3974 /// that should be counted toward the maximum instantiation depth. 3975 bool isInstantiationRecord() const; 3976 3977 friend bool operator==(const ActiveTemplateInstantiation &X, 3978 const ActiveTemplateInstantiation &Y) { 3979 if (X.Kind != Y.Kind) 3980 return false; 3981 3982 if (X.Entity != Y.Entity) 3983 return false; 3984 3985 switch (X.Kind) { 3986 case TemplateInstantiation: 3987 return true; 3988 3989 case PriorTemplateArgumentSubstitution: 3990 case DefaultTemplateArgumentChecking: 3991 if (X.Template != Y.Template) 3992 return false; 3993 3994 // Fall through 3995 3996 case DefaultTemplateArgumentInstantiation: 3997 case ExplicitTemplateArgumentSubstitution: 3998 case DeducedTemplateArgumentSubstitution: 3999 case DefaultFunctionArgumentInstantiation: 4000 return X.TemplateArgs == Y.TemplateArgs; 4001 4002 } 4003 4004 return true; 4005 } 4006 4007 friend bool operator!=(const ActiveTemplateInstantiation &X, 4008 const ActiveTemplateInstantiation &Y) { 4009 return !(X == Y); 4010 } 4011 }; 4012 4013 /// \brief List of active template instantiations. 4014 /// 4015 /// This vector is treated as a stack. As one template instantiation 4016 /// requires another template instantiation, additional 4017 /// instantiations are pushed onto the stack up to a 4018 /// user-configurable limit LangOptions::InstantiationDepth. 4019 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4020 ActiveTemplateInstantiations; 4021 4022 /// \brief Whether we are in a SFINAE context that is not associated with 4023 /// template instantiation. 4024 /// 4025 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4026 /// of a template instantiation or template argument deduction. 4027 bool InNonInstantiationSFINAEContext; 4028 4029 /// \brief The number of ActiveTemplateInstantiation entries in 4030 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4031 /// therefore, should not be counted as part of the instantiation depth. 4032 unsigned NonInstantiationEntries; 4033 4034 /// \brief The last template from which a template instantiation 4035 /// error or warning was produced. 4036 /// 4037 /// This value is used to suppress printing of redundant template 4038 /// instantiation backtraces when there are multiple errors in the 4039 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4040 /// to implement it anywhere else. 4041 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4042 4043 /// \brief The current index into pack expansion arguments that will be 4044 /// used for substitution of parameter packs. 4045 /// 4046 /// The pack expansion index will be -1 to indicate that parameter packs 4047 /// should be instantiated as themselves. Otherwise, the index specifies 4048 /// which argument within the parameter pack will be used for substitution. 4049 int ArgumentPackSubstitutionIndex; 4050 4051 /// \brief RAII object used to change the argument pack substitution index 4052 /// within a \c Sema object. 4053 /// 4054 /// See \c ArgumentPackSubstitutionIndex for more information. 4055 class ArgumentPackSubstitutionIndexRAII { 4056 Sema &Self; 4057 int OldSubstitutionIndex; 4058 4059 public: 4060 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4061 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4062 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4063 } 4064 4065 ~ArgumentPackSubstitutionIndexRAII() { 4066 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4067 } 4068 }; 4069 4070 friend class ArgumentPackSubstitutionRAII; 4071 4072 /// \brief The stack of calls expression undergoing template instantiation. 4073 /// 4074 /// The top of this stack is used by a fixit instantiating unresolved 4075 /// function calls to fix the AST to match the textual change it prints. 4076 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4077 4078 /// \brief For each declaration that involved template argument deduction, the 4079 /// set of diagnostics that were suppressed during that template argument 4080 /// deduction. 4081 /// 4082 /// FIXME: Serialize this structure to the AST file. 4083 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4084 SuppressedDiagnostics; 4085 4086 /// \brief A stack object to be created when performing template 4087 /// instantiation. 4088 /// 4089 /// Construction of an object of type \c InstantiatingTemplate 4090 /// pushes the current instantiation onto the stack of active 4091 /// instantiations. If the size of this stack exceeds the maximum 4092 /// number of recursive template instantiations, construction 4093 /// produces an error and evaluates true. 4094 /// 4095 /// Destruction of this object will pop the named instantiation off 4096 /// the stack. 4097 struct InstantiatingTemplate { 4098 /// \brief Note that we are instantiating a class template, 4099 /// function template, or a member thereof. 4100 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4101 Decl *Entity, 4102 SourceRange InstantiationRange = SourceRange()); 4103 4104 /// \brief Note that we are instantiating a default argument in a 4105 /// template-id. 4106 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4107 TemplateDecl *Template, 4108 const TemplateArgument *TemplateArgs, 4109 unsigned NumTemplateArgs, 4110 SourceRange InstantiationRange = SourceRange()); 4111 4112 /// \brief Note that we are instantiating a default argument in a 4113 /// template-id. 4114 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4115 FunctionTemplateDecl *FunctionTemplate, 4116 const TemplateArgument *TemplateArgs, 4117 unsigned NumTemplateArgs, 4118 ActiveTemplateInstantiation::InstantiationKind Kind, 4119 sema::TemplateDeductionInfo &DeductionInfo, 4120 SourceRange InstantiationRange = SourceRange()); 4121 4122 /// \brief Note that we are instantiating as part of template 4123 /// argument deduction for a class template partial 4124 /// specialization. 4125 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4126 ClassTemplatePartialSpecializationDecl *PartialSpec, 4127 const TemplateArgument *TemplateArgs, 4128 unsigned NumTemplateArgs, 4129 sema::TemplateDeductionInfo &DeductionInfo, 4130 SourceRange InstantiationRange = SourceRange()); 4131 4132 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4133 ParmVarDecl *Param, 4134 const TemplateArgument *TemplateArgs, 4135 unsigned NumTemplateArgs, 4136 SourceRange InstantiationRange = SourceRange()); 4137 4138 /// \brief Note that we are substituting prior template arguments into a 4139 /// non-type or template template parameter. 4140 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4141 NamedDecl *Template, 4142 NonTypeTemplateParmDecl *Param, 4143 const TemplateArgument *TemplateArgs, 4144 unsigned NumTemplateArgs, 4145 SourceRange InstantiationRange); 4146 4147 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4148 NamedDecl *Template, 4149 TemplateTemplateParmDecl *Param, 4150 const TemplateArgument *TemplateArgs, 4151 unsigned NumTemplateArgs, 4152 SourceRange InstantiationRange); 4153 4154 /// \brief Note that we are checking the default template argument 4155 /// against the template parameter for a given template-id. 4156 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4157 TemplateDecl *Template, 4158 NamedDecl *Param, 4159 const TemplateArgument *TemplateArgs, 4160 unsigned NumTemplateArgs, 4161 SourceRange InstantiationRange); 4162 4163 4164 /// \brief Note that we have finished instantiating this template. 4165 void Clear(); 4166 4167 ~InstantiatingTemplate() { Clear(); } 4168 4169 /// \brief Determines whether we have exceeded the maximum 4170 /// recursive template instantiations. 4171 operator bool() const { return Invalid; } 4172 4173 private: 4174 Sema &SemaRef; 4175 bool Invalid; 4176 bool SavedInNonInstantiationSFINAEContext; 4177 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4178 SourceRange InstantiationRange); 4179 4180 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4181 4182 InstantiatingTemplate& 4183 operator=(const InstantiatingTemplate&); // not implemented 4184 }; 4185 4186 void PrintInstantiationStack(); 4187 4188 /// \brief Determines whether we are currently in a context where 4189 /// template argument substitution failures are not considered 4190 /// errors. 4191 /// 4192 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4193 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4194 /// template-deduction context object, which can be used to capture 4195 /// diagnostics that will be suppressed. 4196 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4197 4198 /// \brief RAII class used to determine whether SFINAE has 4199 /// trapped any errors that occur during template argument 4200 /// deduction.` 4201 class SFINAETrap { 4202 Sema &SemaRef; 4203 unsigned PrevSFINAEErrors; 4204 bool PrevInNonInstantiationSFINAEContext; 4205 bool PrevAccessCheckingSFINAE; 4206 4207 public: 4208 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4209 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4210 PrevInNonInstantiationSFINAEContext( 4211 SemaRef.InNonInstantiationSFINAEContext), 4212 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4213 { 4214 if (!SemaRef.isSFINAEContext()) 4215 SemaRef.InNonInstantiationSFINAEContext = true; 4216 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4217 } 4218 4219 ~SFINAETrap() { 4220 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4221 SemaRef.InNonInstantiationSFINAEContext 4222 = PrevInNonInstantiationSFINAEContext; 4223 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4224 } 4225 4226 /// \brief Determine whether any SFINAE errors have been trapped. 4227 bool hasErrorOccurred() const { 4228 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4229 } 4230 }; 4231 4232 /// \brief The current instantiation scope used to store local 4233 /// variables. 4234 LocalInstantiationScope *CurrentInstantiationScope; 4235 4236 /// \brief The number of typos corrected by CorrectTypo. 4237 unsigned TyposCorrected; 4238 4239 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4240 UnqualifiedTyposCorrectedMap; 4241 4242 /// \brief A cache containing the results of typo correction for unqualified 4243 /// name lookup. 4244 /// 4245 /// The string is the string that we corrected to (which may be empty, if 4246 /// there was no correction), while the boolean will be true when the 4247 /// string represents a keyword. 4248 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4249 4250 /// \brief Worker object for performing CFG-based warnings. 4251 sema::AnalysisBasedWarnings AnalysisWarnings; 4252 4253 /// \brief An entity for which implicit template instantiation is required. 4254 /// 4255 /// The source location associated with the declaration is the first place in 4256 /// the source code where the declaration was "used". It is not necessarily 4257 /// the point of instantiation (which will be either before or after the 4258 /// namespace-scope declaration that triggered this implicit instantiation), 4259 /// However, it is the location that diagnostics should generally refer to, 4260 /// because users will need to know what code triggered the instantiation. 4261 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4262 4263 /// \brief The queue of implicit template instantiations that are required 4264 /// but have not yet been performed. 4265 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4266 4267 /// \brief The queue of implicit template instantiations that are required 4268 /// and must be performed within the current local scope. 4269 /// 4270 /// This queue is only used for member functions of local classes in 4271 /// templates, which must be instantiated in the same scope as their 4272 /// enclosing function, so that they can reference function-local 4273 /// types, static variables, enumerators, etc. 4274 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4275 4276 void PerformPendingInstantiations(bool LocalOnly = false); 4277 4278 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4279 const MultiLevelTemplateArgumentList &TemplateArgs, 4280 SourceLocation Loc, DeclarationName Entity); 4281 4282 QualType SubstType(QualType T, 4283 const MultiLevelTemplateArgumentList &TemplateArgs, 4284 SourceLocation Loc, DeclarationName Entity); 4285 4286 TypeSourceInfo *SubstType(TypeLoc TL, 4287 const MultiLevelTemplateArgumentList &TemplateArgs, 4288 SourceLocation Loc, DeclarationName Entity); 4289 4290 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4291 const MultiLevelTemplateArgumentList &TemplateArgs, 4292 SourceLocation Loc, 4293 DeclarationName Entity); 4294 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4295 const MultiLevelTemplateArgumentList &TemplateArgs, 4296 llvm::Optional<unsigned> NumExpansions); 4297 bool SubstParmTypes(SourceLocation Loc, 4298 ParmVarDecl **Params, unsigned NumParams, 4299 const MultiLevelTemplateArgumentList &TemplateArgs, 4300 llvm::SmallVectorImpl<QualType> &ParamTypes, 4301 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4302 ExprResult SubstExpr(Expr *E, 4303 const MultiLevelTemplateArgumentList &TemplateArgs); 4304 4305 /// \brief Substitute the given template arguments into a list of 4306 /// expressions, expanding pack expansions if required. 4307 /// 4308 /// \param Exprs The list of expressions to substitute into. 4309 /// 4310 /// \param NumExprs The number of expressions in \p Exprs. 4311 /// 4312 /// \param IsCall Whether this is some form of call, in which case 4313 /// default arguments will be dropped. 4314 /// 4315 /// \param TemplateArgs The set of template arguments to substitute. 4316 /// 4317 /// \param Outputs Will receive all of the substituted arguments. 4318 /// 4319 /// \returns true if an error occurred, false otherwise. 4320 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4321 const MultiLevelTemplateArgumentList &TemplateArgs, 4322 llvm::SmallVectorImpl<Expr *> &Outputs); 4323 4324 StmtResult SubstStmt(Stmt *S, 4325 const MultiLevelTemplateArgumentList &TemplateArgs); 4326 4327 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4328 const MultiLevelTemplateArgumentList &TemplateArgs); 4329 4330 bool 4331 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4332 CXXRecordDecl *Pattern, 4333 const MultiLevelTemplateArgumentList &TemplateArgs); 4334 4335 bool 4336 InstantiateClass(SourceLocation PointOfInstantiation, 4337 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4338 const MultiLevelTemplateArgumentList &TemplateArgs, 4339 TemplateSpecializationKind TSK, 4340 bool Complain = true); 4341 4342 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4343 Decl *Pattern, Decl *Inst); 4344 4345 bool 4346 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4347 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4348 TemplateSpecializationKind TSK, 4349 bool Complain = true); 4350 4351 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4352 CXXRecordDecl *Instantiation, 4353 const MultiLevelTemplateArgumentList &TemplateArgs, 4354 TemplateSpecializationKind TSK); 4355 4356 void InstantiateClassTemplateSpecializationMembers( 4357 SourceLocation PointOfInstantiation, 4358 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4359 TemplateSpecializationKind TSK); 4360 4361 NestedNameSpecifierLoc 4362 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4363 const MultiLevelTemplateArgumentList &TemplateArgs); 4364 4365 DeclarationNameInfo 4366 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4367 const MultiLevelTemplateArgumentList &TemplateArgs); 4368 TemplateName 4369 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4370 SourceLocation Loc, 4371 const MultiLevelTemplateArgumentList &TemplateArgs); 4372 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4373 TemplateArgumentListInfo &Result, 4374 const MultiLevelTemplateArgumentList &TemplateArgs); 4375 4376 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4377 FunctionDecl *Function, 4378 bool Recursive = false, 4379 bool DefinitionRequired = false); 4380 void InstantiateStaticDataMemberDefinition( 4381 SourceLocation PointOfInstantiation, 4382 VarDecl *Var, 4383 bool Recursive = false, 4384 bool DefinitionRequired = false); 4385 4386 void InstantiateMemInitializers(CXXConstructorDecl *New, 4387 const CXXConstructorDecl *Tmpl, 4388 const MultiLevelTemplateArgumentList &TemplateArgs); 4389 4390 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4391 const MultiLevelTemplateArgumentList &TemplateArgs); 4392 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4393 const MultiLevelTemplateArgumentList &TemplateArgs); 4394 4395 // Objective-C declarations. 4396 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4397 IdentifierInfo *ClassName, 4398 SourceLocation ClassLoc, 4399 IdentifierInfo *SuperName, 4400 SourceLocation SuperLoc, 4401 Decl * const *ProtoRefs, 4402 unsigned NumProtoRefs, 4403 const SourceLocation *ProtoLocs, 4404 SourceLocation EndProtoLoc, 4405 AttributeList *AttrList); 4406 4407 Decl *ActOnCompatiblityAlias( 4408 SourceLocation AtCompatibilityAliasLoc, 4409 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4410 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4411 4412 void CheckForwardProtocolDeclarationForCircularDependency( 4413 IdentifierInfo *PName, 4414 SourceLocation &PLoc, SourceLocation PrevLoc, 4415 const ObjCList<ObjCProtocolDecl> &PList); 4416 4417 Decl *ActOnStartProtocolInterface( 4418 SourceLocation AtProtoInterfaceLoc, 4419 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4420 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4421 const SourceLocation *ProtoLocs, 4422 SourceLocation EndProtoLoc, 4423 AttributeList *AttrList); 4424 4425 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4426 IdentifierInfo *ClassName, 4427 SourceLocation ClassLoc, 4428 IdentifierInfo *CategoryName, 4429 SourceLocation CategoryLoc, 4430 Decl * const *ProtoRefs, 4431 unsigned NumProtoRefs, 4432 const SourceLocation *ProtoLocs, 4433 SourceLocation EndProtoLoc); 4434 4435 Decl *ActOnStartClassImplementation( 4436 SourceLocation AtClassImplLoc, 4437 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4438 IdentifierInfo *SuperClassname, 4439 SourceLocation SuperClassLoc); 4440 4441 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4442 IdentifierInfo *ClassName, 4443 SourceLocation ClassLoc, 4444 IdentifierInfo *CatName, 4445 SourceLocation CatLoc); 4446 4447 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4448 IdentifierInfo **IdentList, 4449 SourceLocation *IdentLocs, 4450 unsigned NumElts); 4451 4452 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4453 const IdentifierLocPair *IdentList, 4454 unsigned NumElts, 4455 AttributeList *attrList); 4456 4457 void FindProtocolDeclaration(bool WarnOnDeclarations, 4458 const IdentifierLocPair *ProtocolId, 4459 unsigned NumProtocols, 4460 llvm::SmallVectorImpl<Decl *> &Protocols); 4461 4462 /// Ensure attributes are consistent with type. 4463 /// \param [in, out] Attributes The attributes to check; they will 4464 /// be modified to be consistent with \arg PropertyTy. 4465 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4466 SourceLocation Loc, 4467 unsigned &Attributes); 4468 4469 /// Process the specified property declaration and create decls for the 4470 /// setters and getters as needed. 4471 /// \param property The property declaration being processed 4472 /// \param DC The semantic container for the property 4473 /// \param redeclaredProperty Declaration for property if redeclared 4474 /// in class extension. 4475 /// \param lexicalDC Container for redeclaredProperty. 4476 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4477 ObjCContainerDecl *DC, 4478 ObjCPropertyDecl *redeclaredProperty = 0, 4479 ObjCContainerDecl *lexicalDC = 0); 4480 4481 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4482 ObjCPropertyDecl *SuperProperty, 4483 const IdentifierInfo *Name); 4484 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4485 4486 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4487 ObjCMethodDecl *MethodDecl, 4488 bool IsInstance); 4489 4490 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4491 4492 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4493 ObjCInterfaceDecl *ID); 4494 4495 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4496 ObjCProtocolDecl *PDecl); 4497 4498 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4499 Decl **allMethods = 0, unsigned allNum = 0, 4500 Decl **allProperties = 0, unsigned pNum = 0, 4501 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4502 4503 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4504 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4505 Selector GetterSel, Selector SetterSel, 4506 Decl *ClassCategory, 4507 bool *OverridingProperty, 4508 tok::ObjCKeywordKind MethodImplKind, 4509 DeclContext *lexicalDC = 0); 4510 4511 Decl *ActOnPropertyImplDecl(Scope *S, 4512 SourceLocation AtLoc, 4513 SourceLocation PropertyLoc, 4514 bool ImplKind,Decl *ClassImplDecl, 4515 IdentifierInfo *PropertyId, 4516 IdentifierInfo *PropertyIvar, 4517 SourceLocation PropertyIvarLoc); 4518 4519 struct ObjCArgInfo { 4520 IdentifierInfo *Name; 4521 SourceLocation NameLoc; 4522 // The Type is null if no type was specified, and the DeclSpec is invalid 4523 // in this case. 4524 ParsedType Type; 4525 ObjCDeclSpec DeclSpec; 4526 4527 /// ArgAttrs - Attribute list for this argument. 4528 AttributeList *ArgAttrs; 4529 }; 4530 4531 Decl *ActOnMethodDeclaration( 4532 Scope *S, 4533 SourceLocation BeginLoc, // location of the + or -. 4534 SourceLocation EndLoc, // location of the ; or {. 4535 tok::TokenKind MethodType, 4536 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4537 Selector Sel, 4538 // optional arguments. The number of types/arguments is obtained 4539 // from the Sel.getNumArgs(). 4540 ObjCArgInfo *ArgInfo, 4541 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4542 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4543 bool isVariadic = false); 4544 4545 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4546 // Will search "local" class/category implementations for a method decl. 4547 // Will also search in class's root looking for instance method. 4548 // Returns 0 if no method is found. 4549 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4550 ObjCInterfaceDecl *CDecl); 4551 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4552 ObjCInterfaceDecl *ClassDecl); 4553 4554 ExprResult 4555 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4556 Expr *BaseExpr, 4557 DeclarationName MemberName, 4558 SourceLocation MemberLoc, 4559 SourceLocation SuperLoc, QualType SuperType, 4560 bool Super); 4561 4562 ExprResult 4563 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4564 IdentifierInfo &propertyName, 4565 SourceLocation receiverNameLoc, 4566 SourceLocation propertyNameLoc); 4567 4568 ObjCMethodDecl *tryCaptureObjCSelf(); 4569 4570 /// \brief Describes the kind of message expression indicated by a message 4571 /// send that starts with an identifier. 4572 enum ObjCMessageKind { 4573 /// \brief The message is sent to 'super'. 4574 ObjCSuperMessage, 4575 /// \brief The message is an instance message. 4576 ObjCInstanceMessage, 4577 /// \brief The message is a class message, and the identifier is a type 4578 /// name. 4579 ObjCClassMessage 4580 }; 4581 4582 ObjCMessageKind getObjCMessageKind(Scope *S, 4583 IdentifierInfo *Name, 4584 SourceLocation NameLoc, 4585 bool IsSuper, 4586 bool HasTrailingDot, 4587 ParsedType &ReceiverType); 4588 4589 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4590 Selector Sel, 4591 SourceLocation LBracLoc, 4592 SourceLocation SelectorLoc, 4593 SourceLocation RBracLoc, 4594 MultiExprArg Args); 4595 4596 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4597 QualType ReceiverType, 4598 SourceLocation SuperLoc, 4599 Selector Sel, 4600 ObjCMethodDecl *Method, 4601 SourceLocation LBracLoc, 4602 SourceLocation SelectorLoc, 4603 SourceLocation RBracLoc, 4604 MultiExprArg Args); 4605 4606 ExprResult ActOnClassMessage(Scope *S, 4607 ParsedType Receiver, 4608 Selector Sel, 4609 SourceLocation LBracLoc, 4610 SourceLocation SelectorLoc, 4611 SourceLocation RBracLoc, 4612 MultiExprArg Args); 4613 4614 ExprResult BuildInstanceMessage(Expr *Receiver, 4615 QualType ReceiverType, 4616 SourceLocation SuperLoc, 4617 Selector Sel, 4618 ObjCMethodDecl *Method, 4619 SourceLocation LBracLoc, 4620 SourceLocation SelectorLoc, 4621 SourceLocation RBracLoc, 4622 MultiExprArg Args); 4623 4624 ExprResult ActOnInstanceMessage(Scope *S, 4625 Expr *Receiver, 4626 Selector Sel, 4627 SourceLocation LBracLoc, 4628 SourceLocation SelectorLoc, 4629 SourceLocation RBracLoc, 4630 MultiExprArg Args); 4631 4632 4633 enum PragmaOptionsAlignKind { 4634 POAK_Native, // #pragma options align=native 4635 POAK_Natural, // #pragma options align=natural 4636 POAK_Packed, // #pragma options align=packed 4637 POAK_Power, // #pragma options align=power 4638 POAK_Mac68k, // #pragma options align=mac68k 4639 POAK_Reset // #pragma options align=reset 4640 }; 4641 4642 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4643 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4644 SourceLocation PragmaLoc, 4645 SourceLocation KindLoc); 4646 4647 enum PragmaPackKind { 4648 PPK_Default, // #pragma pack([n]) 4649 PPK_Show, // #pragma pack(show), only supported by MSVC. 4650 PPK_Push, // #pragma pack(push, [identifier], [n]) 4651 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4652 }; 4653 4654 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4655 void ActOnPragmaPack(PragmaPackKind Kind, 4656 IdentifierInfo *Name, 4657 Expr *Alignment, 4658 SourceLocation PragmaLoc, 4659 SourceLocation LParenLoc, 4660 SourceLocation RParenLoc); 4661 4662 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4663 void ActOnPragmaUnused(const Token &Identifier, 4664 Scope *curScope, 4665 SourceLocation PragmaLoc); 4666 4667 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4668 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4669 SourceLocation PragmaLoc); 4670 4671 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4672 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4673 4674 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4675 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4676 SourceLocation PragmaLoc, 4677 SourceLocation WeakNameLoc); 4678 4679 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4680 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4681 IdentifierInfo* AliasName, 4682 SourceLocation PragmaLoc, 4683 SourceLocation WeakNameLoc, 4684 SourceLocation AliasNameLoc); 4685 4686 /// ActOnPragmaFPContract - Called on well formed 4687 /// #pragma {STDC,OPENCL} FP_CONTRACT 4688 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4689 4690 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4691 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4692 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4693 4694 /// FreePackedContext - Deallocate and null out PackContext. 4695 void FreePackedContext(); 4696 4697 /// PushNamespaceVisibilityAttr - Note that we've entered a 4698 /// namespace with a visibility attribute. 4699 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4700 4701 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4702 /// add an appropriate visibility attribute. 4703 void AddPushedVisibilityAttribute(Decl *RD); 4704 4705 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4706 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4707 void PopPragmaVisibility(); 4708 4709 /// FreeVisContext - Deallocate and null out VisContext. 4710 void FreeVisContext(); 4711 4712 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4713 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4714 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4715 4716 /// CastCategory - Get the correct forwarded implicit cast result category 4717 /// from the inner expression. 4718 ExprValueKind CastCategory(Expr *E); 4719 4720 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4721 /// cast. If there is already an implicit cast, merge into the existing one. 4722 /// If isLvalue, the result of the cast is an lvalue. 4723 void ImpCastExprToType(Expr *&Expr, QualType Type, CastKind CK, 4724 ExprValueKind VK = VK_RValue, 4725 const CXXCastPath *BasePath = 0); 4726 4727 /// IgnoredValueConversions - Given that an expression's result is 4728 /// syntactically ignored, perform any conversions that are 4729 /// required. 4730 void IgnoredValueConversions(Expr *&expr); 4731 4732 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4733 // functions and arrays to their respective pointers (C99 6.3.2.1). 4734 Expr *UsualUnaryConversions(Expr *&expr); 4735 4736 // DefaultFunctionArrayConversion - converts functions and arrays 4737 // to their respective pointers (C99 6.3.2.1). 4738 void DefaultFunctionArrayConversion(Expr *&expr); 4739 4740 // DefaultFunctionArrayLvalueConversion - converts functions and 4741 // arrays to their respective pointers and performs the 4742 // lvalue-to-rvalue conversion. 4743 void DefaultFunctionArrayLvalueConversion(Expr *&expr); 4744 4745 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4746 // the operand. This is DefaultFunctionArrayLvalueConversion, 4747 // except that it assumes the operand isn't of function or array 4748 // type. 4749 void DefaultLvalueConversion(Expr *&expr); 4750 4751 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4752 // do not have a prototype. Integer promotions are performed on each 4753 // argument, and arguments that have type float are promoted to double. 4754 void DefaultArgumentPromotion(Expr *&Expr); 4755 4756 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4757 enum VariadicCallType { 4758 VariadicFunction, 4759 VariadicBlock, 4760 VariadicMethod, 4761 VariadicConstructor, 4762 VariadicDoesNotApply 4763 }; 4764 4765 /// GatherArgumentsForCall - Collector argument expressions for various 4766 /// form of call prototypes. 4767 bool GatherArgumentsForCall(SourceLocation CallLoc, 4768 FunctionDecl *FDecl, 4769 const FunctionProtoType *Proto, 4770 unsigned FirstProtoArg, 4771 Expr **Args, unsigned NumArgs, 4772 llvm::SmallVector<Expr *, 8> &AllArgs, 4773 VariadicCallType CallType = VariadicDoesNotApply); 4774 4775 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4776 // will warn if the resulting type is not a POD type. 4777 bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT, 4778 FunctionDecl *FDecl); 4779 4780 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4781 // operands and then handles various conversions that are common to binary 4782 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4783 // routine returns the first non-arithmetic type found. The client is 4784 // responsible for emitting appropriate error diagnostics. 4785 QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr, 4786 bool isCompAssign = false); 4787 4788 /// AssignConvertType - All of the 'assignment' semantic checks return this 4789 /// enum to indicate whether the assignment was allowed. These checks are 4790 /// done for simple assignments, as well as initialization, return from 4791 /// function, argument passing, etc. The query is phrased in terms of a 4792 /// source and destination type. 4793 enum AssignConvertType { 4794 /// Compatible - the types are compatible according to the standard. 4795 Compatible, 4796 4797 /// PointerToInt - The assignment converts a pointer to an int, which we 4798 /// accept as an extension. 4799 PointerToInt, 4800 4801 /// IntToPointer - The assignment converts an int to a pointer, which we 4802 /// accept as an extension. 4803 IntToPointer, 4804 4805 /// FunctionVoidPointer - The assignment is between a function pointer and 4806 /// void*, which the standard doesn't allow, but we accept as an extension. 4807 FunctionVoidPointer, 4808 4809 /// IncompatiblePointer - The assignment is between two pointers types that 4810 /// are not compatible, but we accept them as an extension. 4811 IncompatiblePointer, 4812 4813 /// IncompatiblePointer - The assignment is between two pointers types which 4814 /// point to integers which have a different sign, but are otherwise identical. 4815 /// This is a subset of the above, but broken out because it's by far the most 4816 /// common case of incompatible pointers. 4817 IncompatiblePointerSign, 4818 4819 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4820 /// c/v/r qualifiers, which we accept as an extension. 4821 CompatiblePointerDiscardsQualifiers, 4822 4823 /// IncompatiblePointerDiscardsQualifiers - The assignment 4824 /// discards qualifiers that we don't permit to be discarded, 4825 /// like address spaces. 4826 IncompatiblePointerDiscardsQualifiers, 4827 4828 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4829 /// nested pointer types, and the qualifiers other than the first two 4830 /// levels differ e.g. char ** -> const char **, but we accept them as an 4831 /// extension. 4832 IncompatibleNestedPointerQualifiers, 4833 4834 /// IncompatibleVectors - The assignment is between two vector types that 4835 /// have the same size, which we accept as an extension. 4836 IncompatibleVectors, 4837 4838 /// IntToBlockPointer - The assignment converts an int to a block 4839 /// pointer. We disallow this. 4840 IntToBlockPointer, 4841 4842 /// IncompatibleBlockPointer - The assignment is between two block 4843 /// pointers types that are not compatible. 4844 IncompatibleBlockPointer, 4845 4846 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4847 /// id type and something else (that is incompatible with it). For example, 4848 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4849 IncompatibleObjCQualifiedId, 4850 4851 /// Incompatible - We reject this conversion outright, it is invalid to 4852 /// represent it in the AST. 4853 Incompatible 4854 }; 4855 4856 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4857 /// assignment conversion type specified by ConvTy. This returns true if the 4858 /// conversion was invalid or false if the conversion was accepted. 4859 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4860 SourceLocation Loc, 4861 QualType DstType, QualType SrcType, 4862 Expr *SrcExpr, AssignmentAction Action, 4863 bool *Complained = 0); 4864 4865 /// CheckAssignmentConstraints - Perform type checking for assignment, 4866 /// argument passing, variable initialization, and function return values. 4867 /// C99 6.5.16. 4868 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 4869 QualType lhs, QualType rhs); 4870 4871 /// Check assignment constraints and prepare for a conversion of the 4872 /// RHS to the LHS type. 4873 AssignConvertType CheckAssignmentConstraints(QualType lhs, Expr *&rhs, 4874 CastKind &Kind); 4875 4876 // CheckSingleAssignmentConstraints - Currently used by 4877 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4878 // this routine performs the default function/array converions. 4879 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4880 Expr *&rExpr); 4881 4882 // \brief If the lhs type is a transparent union, check whether we 4883 // can initialize the transparent union with the given expression. 4884 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4885 Expr *&rExpr); 4886 4887 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4888 4889 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4890 4891 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4892 AssignmentAction Action, 4893 bool AllowExplicit = false); 4894 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4895 AssignmentAction Action, 4896 bool AllowExplicit, 4897 ImplicitConversionSequence& ICS); 4898 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4899 const ImplicitConversionSequence& ICS, 4900 AssignmentAction Action, 4901 bool CStyle = false); 4902 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4903 const StandardConversionSequence& SCS, 4904 AssignmentAction Action, 4905 bool CStyle); 4906 4907 /// the following "Check" methods will return a valid/converted QualType 4908 /// or a null QualType (indicating an error diagnostic was issued). 4909 4910 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4911 QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4912 QualType CheckPointerToMemberOperands( // C++ 5.5 4913 Expr *&lex, Expr *&rex, ExprValueKind &VK, 4914 SourceLocation OpLoc, bool isIndirect); 4915 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4916 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign, 4917 bool isDivide); 4918 QualType CheckRemainderOperands( // C99 6.5.5 4919 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4920 QualType CheckAdditionOperands( // C99 6.5.6 4921 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4922 QualType CheckSubtractionOperands( // C99 6.5.6 4923 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4924 QualType CheckShiftOperands( // C99 6.5.7 4925 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4926 bool isCompAssign = false); 4927 QualType CheckCompareOperands( // C99 6.5.8/9 4928 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4929 bool isRelational); 4930 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4931 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4932 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4933 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc); 4934 // CheckAssignmentOperands is used for both simple and compound assignment. 4935 // For simple assignment, pass both expressions and a null converted type. 4936 // For compound assignment, pass both expressions and the converted type. 4937 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4938 Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType); 4939 4940 void ConvertPropertyForRValue(Expr *&E); 4941 void ConvertPropertyForLValue(Expr *&LHS, Expr *&RHS, QualType& LHSTy); 4942 4943 QualType CheckConditionalOperands( // C99 6.5.15 4944 Expr *&cond, Expr *&lhs, Expr *&rhs, 4945 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4946 QualType CXXCheckConditionalOperands( // C++ 5.16 4947 Expr *&cond, Expr *&lhs, Expr *&rhs, 4948 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4949 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4950 bool *NonStandardCompositeType = 0); 4951 4952 QualType FindCompositeObjCPointerType(Expr *&LHS, Expr *&RHS, 4953 SourceLocation questionLoc); 4954 4955 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 4956 SourceLocation QuestionLoc); 4957 4958 /// type checking for vector binary operators. 4959 QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4960 QualType CheckVectorCompareOperands(Expr *&lex, Expr *&rx, 4961 SourceLocation l, bool isRel); 4962 4963 /// type checking declaration initializers (C99 6.7.8) 4964 bool CheckInitList(const InitializedEntity &Entity, 4965 InitListExpr *&InitList, QualType &DeclType); 4966 bool CheckForConstantInitializer(Expr *e, QualType t); 4967 4968 // type checking C++ declaration initializers (C++ [dcl.init]). 4969 4970 /// ReferenceCompareResult - Expresses the result of comparing two 4971 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 4972 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 4973 enum ReferenceCompareResult { 4974 /// Ref_Incompatible - The two types are incompatible, so direct 4975 /// reference binding is not possible. 4976 Ref_Incompatible = 0, 4977 /// Ref_Related - The two types are reference-related, which means 4978 /// that their unqualified forms (T1 and T2) are either the same 4979 /// or T1 is a base class of T2. 4980 Ref_Related, 4981 /// Ref_Compatible_With_Added_Qualification - The two types are 4982 /// reference-compatible with added qualification, meaning that 4983 /// they are reference-compatible and the qualifiers on T1 (cv1) 4984 /// are greater than the qualifiers on T2 (cv2). 4985 Ref_Compatible_With_Added_Qualification, 4986 /// Ref_Compatible - The two types are reference-compatible and 4987 /// have equivalent qualifiers (cv1 == cv2). 4988 Ref_Compatible 4989 }; 4990 4991 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 4992 QualType T1, QualType T2, 4993 bool &DerivedToBase, 4994 bool &ObjCConversion); 4995 4996 /// CheckCastTypes - Check type constraints for casting between types under 4997 /// C semantics, or forward to CXXCheckCStyleCast in C++. 4998 bool CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *&CastExpr, 4999 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 5000 bool FunctionalStyle = false); 5001 5002 // CheckVectorCast - check type constraints for vectors. 5003 // Since vectors are an extension, there are no C standard reference for this. 5004 // We allow casting between vectors and integer datatypes of the same size. 5005 // returns true if the cast is invalid 5006 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5007 CastKind &Kind); 5008 5009 // CheckExtVectorCast - check type constraints for extended vectors. 5010 // Since vectors are an extension, there are no C standard reference for this. 5011 // We allow casting between vectors and integer datatypes of the same size, 5012 // or vectors and the element type of that vector. 5013 // returns true if the cast is invalid 5014 bool CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *&CastExpr, 5015 CastKind &Kind); 5016 5017 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5018 /// cast under C++ semantics. 5019 bool CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5020 Expr *&CastExpr, CastKind &Kind, 5021 CXXCastPath &BasePath, bool FunctionalStyle); 5022 5023 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5024 /// \param Method - May be null. 5025 /// \param [out] ReturnType - The return type of the send. 5026 /// \return true iff there were any incompatible types. 5027 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5028 ObjCMethodDecl *Method, bool isClassMessage, 5029 SourceLocation lbrac, SourceLocation rbrac, 5030 QualType &ReturnType, ExprValueKind &VK); 5031 5032 /// CheckBooleanCondition - Diagnose problems involving the use of 5033 /// the given expression as a boolean condition (e.g. in an if 5034 /// statement). Also performs the standard function and array 5035 /// decays, possibly changing the input variable. 5036 /// 5037 /// \param Loc - A location associated with the condition, e.g. the 5038 /// 'if' keyword. 5039 /// \return true iff there were any errors 5040 bool CheckBooleanCondition(Expr *&CondExpr, SourceLocation Loc); 5041 5042 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5043 Expr *SubExpr); 5044 5045 /// DiagnoseAssignmentAsCondition - Given that an expression is 5046 /// being used as a boolean condition, warn if it's an assignment. 5047 void DiagnoseAssignmentAsCondition(Expr *E); 5048 5049 /// \brief Redundant parentheses over an equality comparison can indicate 5050 /// that the user intended an assignment used as condition. 5051 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5052 5053 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5054 bool CheckCXXBooleanCondition(Expr *&CondExpr); 5055 5056 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5057 /// the specified width and sign. If an overflow occurs, detect it and emit 5058 /// the specified diagnostic. 5059 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5060 unsigned NewWidth, bool NewSign, 5061 SourceLocation Loc, unsigned DiagID); 5062 5063 /// Checks that the Objective-C declaration is declared in the global scope. 5064 /// Emits an error and marks the declaration as invalid if it's not declared 5065 /// in the global scope. 5066 bool CheckObjCDeclScope(Decl *D); 5067 5068 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5069 /// and reports the appropriate diagnostics. Returns false on success. 5070 /// Can optionally return the value of the expression. 5071 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5072 5073 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5074 /// the correct width, and that the field type is valid. 5075 /// Returns false on success. 5076 /// Can optionally return whether the bit-field is of width 0 5077 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5078 QualType FieldTy, const Expr *BitWidth, 5079 bool *ZeroWidth = 0); 5080 5081 /// \name Code completion 5082 //@{ 5083 /// \brief Describes the context in which code completion occurs. 5084 enum ParserCompletionContext { 5085 /// \brief Code completion occurs at top-level or namespace context. 5086 PCC_Namespace, 5087 /// \brief Code completion occurs within a class, struct, or union. 5088 PCC_Class, 5089 /// \brief Code completion occurs within an Objective-C interface, protocol, 5090 /// or category. 5091 PCC_ObjCInterface, 5092 /// \brief Code completion occurs within an Objective-C implementation or 5093 /// category implementation 5094 PCC_ObjCImplementation, 5095 /// \brief Code completion occurs within the list of instance variables 5096 /// in an Objective-C interface, protocol, category, or implementation. 5097 PCC_ObjCInstanceVariableList, 5098 /// \brief Code completion occurs following one or more template 5099 /// headers. 5100 PCC_Template, 5101 /// \brief Code completion occurs following one or more template 5102 /// headers within a class. 5103 PCC_MemberTemplate, 5104 /// \brief Code completion occurs within an expression. 5105 PCC_Expression, 5106 /// \brief Code completion occurs within a statement, which may 5107 /// also be an expression or a declaration. 5108 PCC_Statement, 5109 /// \brief Code completion occurs at the beginning of the 5110 /// initialization statement (or expression) in a for loop. 5111 PCC_ForInit, 5112 /// \brief Code completion occurs within the condition of an if, 5113 /// while, switch, or for statement. 5114 PCC_Condition, 5115 /// \brief Code completion occurs within the body of a function on a 5116 /// recovery path, where we do not have a specific handle on our position 5117 /// in the grammar. 5118 PCC_RecoveryInFunction, 5119 /// \brief Code completion occurs where only a type is permitted. 5120 PCC_Type, 5121 /// \brief Code completion occurs in a parenthesized expression, which 5122 /// might also be a type cast. 5123 PCC_ParenthesizedExpression, 5124 /// \brief Code completion occurs within a sequence of declaration 5125 /// specifiers within a function, method, or block. 5126 PCC_LocalDeclarationSpecifiers 5127 }; 5128 5129 void CodeCompleteOrdinaryName(Scope *S, 5130 ParserCompletionContext CompletionContext); 5131 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5132 bool AllowNonIdentifiers, 5133 bool AllowNestedNameSpecifiers); 5134 5135 struct CodeCompleteExpressionData; 5136 void CodeCompleteExpression(Scope *S, 5137 const CodeCompleteExpressionData &Data); 5138 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5139 SourceLocation OpLoc, 5140 bool IsArrow); 5141 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5142 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5143 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5144 void CodeCompleteCase(Scope *S); 5145 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5146 void CodeCompleteInitializer(Scope *S, Decl *D); 5147 void CodeCompleteReturn(Scope *S); 5148 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5149 5150 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5151 bool EnteringContext); 5152 void CodeCompleteUsing(Scope *S); 5153 void CodeCompleteUsingDirective(Scope *S); 5154 void CodeCompleteNamespaceDecl(Scope *S); 5155 void CodeCompleteNamespaceAliasDecl(Scope *S); 5156 void CodeCompleteOperatorName(Scope *S); 5157 void CodeCompleteConstructorInitializer(Decl *Constructor, 5158 CXXCtorInitializer** Initializers, 5159 unsigned NumInitializers); 5160 5161 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5162 bool InInterface); 5163 void CodeCompleteObjCAtVisibility(Scope *S); 5164 void CodeCompleteObjCAtStatement(Scope *S); 5165 void CodeCompleteObjCAtExpression(Scope *S); 5166 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5167 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5168 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5169 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5170 bool IsParameter); 5171 void CodeCompleteObjCMessageReceiver(Scope *S); 5172 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5173 IdentifierInfo **SelIdents, 5174 unsigned NumSelIdents, 5175 bool AtArgumentExpression); 5176 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5177 IdentifierInfo **SelIdents, 5178 unsigned NumSelIdents, 5179 bool AtArgumentExpression, 5180 bool IsSuper = false); 5181 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5182 IdentifierInfo **SelIdents, 5183 unsigned NumSelIdents, 5184 bool AtArgumentExpression, 5185 ObjCInterfaceDecl *Super = 0); 5186 void CodeCompleteObjCForCollection(Scope *S, 5187 DeclGroupPtrTy IterationVar); 5188 void CodeCompleteObjCSelector(Scope *S, 5189 IdentifierInfo **SelIdents, 5190 unsigned NumSelIdents); 5191 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5192 unsigned NumProtocols); 5193 void CodeCompleteObjCProtocolDecl(Scope *S); 5194 void CodeCompleteObjCInterfaceDecl(Scope *S); 5195 void CodeCompleteObjCSuperclass(Scope *S, 5196 IdentifierInfo *ClassName, 5197 SourceLocation ClassNameLoc); 5198 void CodeCompleteObjCImplementationDecl(Scope *S); 5199 void CodeCompleteObjCInterfaceCategory(Scope *S, 5200 IdentifierInfo *ClassName, 5201 SourceLocation ClassNameLoc); 5202 void CodeCompleteObjCImplementationCategory(Scope *S, 5203 IdentifierInfo *ClassName, 5204 SourceLocation ClassNameLoc); 5205 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5206 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5207 IdentifierInfo *PropertyName, 5208 Decl *ObjCImpDecl); 5209 void CodeCompleteObjCMethodDecl(Scope *S, 5210 bool IsInstanceMethod, 5211 ParsedType ReturnType, 5212 Decl *IDecl); 5213 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5214 bool IsInstanceMethod, 5215 bool AtParameterName, 5216 ParsedType ReturnType, 5217 IdentifierInfo **SelIdents, 5218 unsigned NumSelIdents); 5219 void CodeCompletePreprocessorDirective(bool InConditional); 5220 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5221 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5222 void CodeCompletePreprocessorExpression(); 5223 void CodeCompletePreprocessorMacroArgument(Scope *S, 5224 IdentifierInfo *Macro, 5225 MacroInfo *MacroInfo, 5226 unsigned Argument); 5227 void CodeCompleteNaturalLanguage(); 5228 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5229 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5230 //@} 5231 5232 void PrintStats() const {} 5233 5234 //===--------------------------------------------------------------------===// 5235 // Extra semantic analysis beyond the C type system 5236 5237public: 5238 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5239 unsigned ByteNo) const; 5240 5241private: 5242 void CheckArrayAccess(const Expr *E); 5243 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5244 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5245 5246 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5247 bool CheckObjCString(Expr *Arg); 5248 5249 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5250 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5251 5252 bool SemaBuiltinVAStart(CallExpr *TheCall); 5253 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5254 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5255 5256public: 5257 // Used by C++ template instantiation. 5258 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5259 5260private: 5261 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5262 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5263 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5264 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5265 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5266 llvm::APSInt &Result); 5267 5268 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5269 bool HasVAListArg, unsigned format_idx, 5270 unsigned firstDataArg, bool isPrintf); 5271 5272 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5273 const CallExpr *TheCall, bool HasVAListArg, 5274 unsigned format_idx, unsigned firstDataArg, 5275 bool isPrintf); 5276 5277 void CheckNonNullArguments(const NonNullAttr *NonNull, 5278 const CallExpr *TheCall); 5279 5280 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5281 unsigned format_idx, unsigned firstDataArg, 5282 bool isPrintf); 5283 5284 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5285 SourceLocation ReturnLoc); 5286 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5287 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5288 5289 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5290 Expr *Init); 5291 5292 /// \brief The parser's current scope. 5293 /// 5294 /// The parser maintains this state here. 5295 Scope *CurScope; 5296 5297protected: 5298 friend class Parser; 5299 friend class InitializationSequence; 5300 5301 /// \brief Retrieve the parser's current scope. 5302 Scope *getCurScope() const { return CurScope; } 5303}; 5304 5305/// \brief RAII object that enters a new expression evaluation context. 5306class EnterExpressionEvaluationContext { 5307 Sema &Actions; 5308 5309public: 5310 EnterExpressionEvaluationContext(Sema &Actions, 5311 Sema::ExpressionEvaluationContext NewContext) 5312 : Actions(Actions) { 5313 Actions.PushExpressionEvaluationContext(NewContext); 5314 } 5315 5316 ~EnterExpressionEvaluationContext() { 5317 Actions.PopExpressionEvaluationContext(); 5318 } 5319}; 5320 5321} // end namespace clang 5322 5323#endif 5324