Sema.h revision 21e006e51a7f9889f55f5bc7b3ca8b50d17571ec
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "llvm/ADT/OwningPtr.h" 31#include "llvm/ADT/SmallPtrSet.h" 32#include "llvm/ADT/SmallVector.h" 33#include <deque> 34#include <string> 35 36namespace llvm { 37 class APSInt; 38 template <typename ValueT> struct DenseMapInfo; 39 template <typename ValueT, typename ValueInfoT> class DenseSet; 40} 41 42namespace clang { 43 class ADLResult; 44 class ASTConsumer; 45 class ASTContext; 46 class ArrayType; 47 class AttributeList; 48 class BlockDecl; 49 class CXXBasePath; 50 class CXXBasePaths; 51 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 52 class CXXConstructorDecl; 53 class CXXConversionDecl; 54 class CXXDestructorDecl; 55 class CXXFieldCollector; 56 class CXXMemberCallExpr; 57 class CXXMethodDecl; 58 class CXXScopeSpec; 59 class CXXTemporary; 60 class CXXTryStmt; 61 class CallExpr; 62 class ClassTemplateDecl; 63 class ClassTemplatePartialSpecializationDecl; 64 class ClassTemplateSpecializationDecl; 65 class CodeCompleteConsumer; 66 class CodeCompletionAllocator; 67 class CodeCompletionResult; 68 class Decl; 69 class DeclAccessPair; 70 class DeclContext; 71 class DeclRefExpr; 72 class DeclaratorDecl; 73 class DeducedTemplateArgument; 74 class DependentDiagnostic; 75 class DesignatedInitExpr; 76 class Designation; 77 class EnumConstantDecl; 78 class Expr; 79 class ExtVectorType; 80 class ExternalSemaSource; 81 class FormatAttr; 82 class FriendDecl; 83 class FunctionDecl; 84 class FunctionProtoType; 85 class FunctionTemplateDecl; 86 class ImplicitConversionSequence; 87 class InitListExpr; 88 class InitializationKind; 89 class InitializationSequence; 90 class InitializedEntity; 91 class IntegerLiteral; 92 class LabelStmt; 93 class LangOptions; 94 class LocalInstantiationScope; 95 class LookupResult; 96 class MacroInfo; 97 class MultiLevelTemplateArgumentList; 98 class NamedDecl; 99 class NonNullAttr; 100 class ObjCCategoryDecl; 101 class ObjCCategoryImplDecl; 102 class ObjCCompatibleAliasDecl; 103 class ObjCContainerDecl; 104 class ObjCImplDecl; 105 class ObjCImplementationDecl; 106 class ObjCInterfaceDecl; 107 class ObjCIvarDecl; 108 template <class T> class ObjCList; 109 class ObjCMethodDecl; 110 class ObjCPropertyDecl; 111 class ObjCProtocolDecl; 112 class OverloadCandidateSet; 113 class ParenListExpr; 114 class ParmVarDecl; 115 class Preprocessor; 116 class PseudoDestructorTypeStorage; 117 class QualType; 118 class StandardConversionSequence; 119 class Stmt; 120 class StringLiteral; 121 class SwitchStmt; 122 class TargetAttributesSema; 123 class TemplateArgument; 124 class TemplateArgumentList; 125 class TemplateArgumentLoc; 126 class TemplateDecl; 127 class TemplateParameterList; 128 class TemplatePartialOrderingContext; 129 class TemplateTemplateParmDecl; 130 class Token; 131 class TypedefDecl; 132 class TypeLoc; 133 class UnqualifiedId; 134 class UnresolvedLookupExpr; 135 class UnresolvedMemberExpr; 136 class UnresolvedSetImpl; 137 class UnresolvedSetIterator; 138 class UsingDecl; 139 class UsingShadowDecl; 140 class ValueDecl; 141 class VarDecl; 142 class VisibilityAttr; 143 class VisibleDeclConsumer; 144 class IndirectFieldDecl; 145 146namespace sema { 147 class AccessedEntity; 148 class BlockScopeInfo; 149 class DelayedDiagnostic; 150 class FunctionScopeInfo; 151 class TemplateDeductionInfo; 152} 153 154/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 155/// parsing. 156/// 157/// LocInfoType is a "transient" type, only needed for passing to/from Parser 158/// and Sema, when we want to preserve type source info for a parsed type. 159/// It will not participate in the type system semantics in any way. 160class LocInfoType : public Type { 161 enum { 162 // The last number that can fit in Type's TC. 163 // Avoids conflict with an existing Type class. 164 LocInfo = Type::TypeLast + 1 165 }; 166 167 TypeSourceInfo *DeclInfo; 168 169 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 170 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 171 ty->isVariablyModifiedType(), 172 ty->containsUnexpandedParameterPack()), 173 DeclInfo(TInfo) { 174 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 175 } 176 friend class Sema; 177 178public: 179 QualType getType() const { return getCanonicalTypeInternal(); } 180 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 181 182 void getAsStringInternal(std::string &Str, 183 const PrintingPolicy &Policy) const; 184 185 static bool classof(const Type *T) { 186 return T->getTypeClass() == (TypeClass)LocInfo; 187 } 188 static bool classof(const LocInfoType *) { return true; } 189}; 190 191// FIXME: No way to easily map from TemplateTypeParmTypes to 192// TemplateTypeParmDecls, so we have this horrible PointerUnion. 193typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 194 SourceLocation> UnexpandedParameterPack; 195 196/// Sema - This implements semantic analysis and AST building for C. 197class Sema { 198 Sema(const Sema&); // DO NOT IMPLEMENT 199 void operator=(const Sema&); // DO NOT IMPLEMENT 200 mutable const TargetAttributesSema* TheTargetAttributesSema; 201public: 202 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 203 typedef OpaquePtr<TemplateName> TemplateTy; 204 typedef OpaquePtr<QualType> TypeTy; 205 typedef Attr AttrTy; 206 typedef CXXBaseSpecifier BaseTy; 207 typedef CXXCtorInitializer MemInitTy; 208 typedef Expr ExprTy; 209 typedef Stmt StmtTy; 210 typedef TemplateParameterList TemplateParamsTy; 211 typedef NestedNameSpecifier CXXScopeTy; 212 213 OpenCLOptions OpenCLFeatures; 214 FPOptions FPFeatures; 215 216 const LangOptions &LangOpts; 217 Preprocessor &PP; 218 ASTContext &Context; 219 ASTConsumer &Consumer; 220 Diagnostic &Diags; 221 SourceManager &SourceMgr; 222 223 /// \brief Source of additional semantic information. 224 ExternalSemaSource *ExternalSource; 225 226 /// \brief Code-completion consumer. 227 CodeCompleteConsumer *CodeCompleter; 228 229 /// CurContext - This is the current declaration context of parsing. 230 DeclContext *CurContext; 231 232 /// VAListTagName - The declaration name corresponding to __va_list_tag. 233 /// This is used as part of a hack to omit that class from ADL results. 234 DeclarationName VAListTagName; 235 236 /// PackContext - Manages the stack for #pragma pack. An alignment 237 /// of 0 indicates default alignment. 238 void *PackContext; // Really a "PragmaPackStack*" 239 240 /// VisContext - Manages the stack for #pragma GCC visibility. 241 void *VisContext; // Really a "PragmaVisStack*" 242 243 /// \brief Stack containing information about each of the nested 244 /// function, block, and method scopes that are currently active. 245 /// 246 /// This array is never empty. Clients should ignore the first 247 /// element, which is used to cache a single FunctionScopeInfo 248 /// that's used to parse every top-level function. 249 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 250 251 /// ExprTemporaries - This is the stack of temporaries that are created by 252 /// the current full expression. 253 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 254 255 /// ExtVectorDecls - This is a list all the extended vector types. This allows 256 /// us to associate a raw vector type with one of the ext_vector type names. 257 /// This is only necessary for issuing pretty diagnostics. 258 llvm::SmallVector<TypedefDecl*, 24> ExtVectorDecls; 259 260 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 261 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 262 263 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 264 265 /// PureVirtualClassDiagSet - a set of class declarations which we have 266 /// emitted a list of pure virtual functions. Used to prevent emitting the 267 /// same list more than once. 268 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 269 270 /// ParsingInitForAutoVars - a set of declarations with auto types for which 271 /// we are currently parsing the initializer. 272 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 273 274 /// \brief A mapping from external names to the most recent 275 /// locally-scoped external declaration with that name. 276 /// 277 /// This map contains external declarations introduced in local 278 /// scoped, e.g., 279 /// 280 /// \code 281 /// void f() { 282 /// void foo(int, int); 283 /// } 284 /// \endcode 285 /// 286 /// Here, the name "foo" will be associated with the declaration on 287 /// "foo" within f. This name is not visible outside of 288 /// "f". However, we still find it in two cases: 289 /// 290 /// - If we are declaring another external with the name "foo", we 291 /// can find "foo" as a previous declaration, so that the types 292 /// of this external declaration can be checked for 293 /// compatibility. 294 /// 295 /// - If we would implicitly declare "foo" (e.g., due to a call to 296 /// "foo" in C when no prototype or definition is visible), then 297 /// we find this declaration of "foo" and complain that it is 298 /// not visible. 299 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 300 301 /// \brief All the tentative definitions encountered in the TU. 302 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 303 304 /// \brief The set of file scoped decls seen so far that have not been used 305 /// and must warn if not used. Only contains the first declaration. 306 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 307 308 class DelayedDiagnostics; 309 310 class ParsingDeclState { 311 unsigned SavedStackSize; 312 friend class Sema::DelayedDiagnostics; 313 }; 314 315 class ProcessingContextState { 316 unsigned SavedParsingDepth; 317 unsigned SavedActiveStackBase; 318 friend class Sema::DelayedDiagnostics; 319 }; 320 321 /// A class which encapsulates the logic for delaying diagnostics 322 /// during parsing and other processing. 323 class DelayedDiagnostics { 324 /// \brief The stack of diagnostics that were delayed due to being 325 /// produced during the parsing of a declaration. 326 sema::DelayedDiagnostic *Stack; 327 328 /// \brief The number of objects on the delayed-diagnostics stack. 329 unsigned StackSize; 330 331 /// \brief The current capacity of the delayed-diagnostics stack. 332 unsigned StackCapacity; 333 334 /// \brief The index of the first "active" delayed diagnostic in 335 /// the stack. When parsing class definitions, we ignore active 336 /// delayed diagnostics from the surrounding context. 337 unsigned ActiveStackBase; 338 339 /// \brief The depth of the declarations we're currently parsing. 340 /// This gets saved and reset whenever we enter a class definition. 341 unsigned ParsingDepth; 342 343 public: 344 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 345 ActiveStackBase(0), ParsingDepth(0) {} 346 347 ~DelayedDiagnostics() { 348 delete[] reinterpret_cast<char*>(Stack); 349 } 350 351 /// Adds a delayed diagnostic. 352 void add(const sema::DelayedDiagnostic &diag); 353 354 /// Determines whether diagnostics should be delayed. 355 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 356 357 /// Observe that we've started parsing a declaration. Access and 358 /// deprecation diagnostics will be delayed; when the declaration 359 /// is completed, all active delayed diagnostics will be evaluated 360 /// in its context, and then active diagnostics stack will be 361 /// popped down to the saved depth. 362 ParsingDeclState pushParsingDecl() { 363 ParsingDepth++; 364 365 ParsingDeclState state; 366 state.SavedStackSize = StackSize; 367 return state; 368 } 369 370 /// Observe that we're completed parsing a declaration. 371 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 372 373 /// Observe that we've started processing a different context, the 374 /// contents of which are semantically separate from the 375 /// declarations it may lexically appear in. This sets aside the 376 /// current stack of active diagnostics and starts afresh. 377 ProcessingContextState pushContext() { 378 assert(StackSize >= ActiveStackBase); 379 380 ProcessingContextState state; 381 state.SavedParsingDepth = ParsingDepth; 382 state.SavedActiveStackBase = ActiveStackBase; 383 384 ActiveStackBase = StackSize; 385 ParsingDepth = 0; 386 387 return state; 388 } 389 390 /// Observe that we've stopped processing a context. This 391 /// restores the previous stack of active diagnostics. 392 void popContext(ProcessingContextState state) { 393 assert(ActiveStackBase == StackSize); 394 assert(ParsingDepth == 0); 395 ActiveStackBase = state.SavedActiveStackBase; 396 ParsingDepth = state.SavedParsingDepth; 397 } 398 } DelayedDiagnostics; 399 400 /// A RAII object to temporarily push a declaration context. 401 class ContextRAII { 402 private: 403 Sema &S; 404 DeclContext *SavedContext; 405 ProcessingContextState SavedContextState; 406 407 public: 408 ContextRAII(Sema &S, DeclContext *ContextToPush) 409 : S(S), SavedContext(S.CurContext), 410 SavedContextState(S.DelayedDiagnostics.pushContext()) 411 { 412 assert(ContextToPush && "pushing null context"); 413 S.CurContext = ContextToPush; 414 } 415 416 void pop() { 417 if (!SavedContext) return; 418 S.CurContext = SavedContext; 419 S.DelayedDiagnostics.popContext(SavedContextState); 420 SavedContext = 0; 421 } 422 423 ~ContextRAII() { 424 pop(); 425 } 426 }; 427 428 /// WeakUndeclaredIdentifiers - Identifiers contained in 429 /// #pragma weak before declared. rare. may alias another 430 /// identifier, declared or undeclared 431 class WeakInfo { 432 IdentifierInfo *alias; // alias (optional) 433 SourceLocation loc; // for diagnostics 434 bool used; // identifier later declared? 435 public: 436 WeakInfo() 437 : alias(0), loc(SourceLocation()), used(false) {} 438 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 439 : alias(Alias), loc(Loc), used(false) {} 440 inline IdentifierInfo * getAlias() const { return alias; } 441 inline SourceLocation getLocation() const { return loc; } 442 void setUsed(bool Used=true) { used = Used; } 443 inline bool getUsed() { return used; } 444 bool operator==(WeakInfo RHS) const { 445 return alias == RHS.getAlias() && loc == RHS.getLocation(); 446 } 447 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 448 }; 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 452 /// #pragma weak during processing of other Decls. 453 /// I couldn't figure out a clean way to generate these in-line, so 454 /// we store them here and handle separately -- which is a hack. 455 /// It would be best to refactor this. 456 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 457 458 IdentifierResolver IdResolver; 459 460 /// Translation Unit Scope - useful to Objective-C actions that need 461 /// to lookup file scope declarations in the "ordinary" C decl namespace. 462 /// For example, user-defined classes, built-in "id" type, etc. 463 Scope *TUScope; 464 465 /// \brief The C++ "std" namespace, where the standard library resides. 466 LazyDeclPtr StdNamespace; 467 468 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 469 /// standard library. 470 LazyDeclPtr StdBadAlloc; 471 472 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 473 RecordDecl *CXXTypeInfoDecl; 474 475 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 476 RecordDecl *MSVCGuidDecl; 477 478 /// A flag to remember whether the implicit forms of operator new and delete 479 /// have been declared. 480 bool GlobalNewDeleteDeclared; 481 482 /// \brief The set of declarations that have been referenced within 483 /// a potentially evaluated expression. 484 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 485 PotentiallyReferencedDecls; 486 487 /// \brief A set of diagnostics that may be emitted. 488 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 489 PotentiallyEmittedDiagnostics; 490 491 /// \brief Describes how the expressions currently being parsed are 492 /// evaluated at run-time, if at all. 493 enum ExpressionEvaluationContext { 494 /// \brief The current expression and its subexpressions occur within an 495 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 496 /// or the subexpression of \c sizeof, where the type or the value of the 497 /// expression may be significant but no code will be generated to evaluate 498 /// the value of the expression at run time. 499 Unevaluated, 500 501 /// \brief The current expression is potentially evaluated at run time, 502 /// which means that code may be generated to evaluate the value of the 503 /// expression at run time. 504 PotentiallyEvaluated, 505 506 /// \brief The current expression may be potentially evaluated or it may 507 /// be unevaluated, but it is impossible to tell from the lexical context. 508 /// This evaluation context is used primary for the operand of the C++ 509 /// \c typeid expression, whose argument is potentially evaluated only when 510 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 511 PotentiallyPotentiallyEvaluated, 512 513 /// \brief The current expression is potentially evaluated, but any 514 /// declarations referenced inside that expression are only used if 515 /// in fact the current expression is used. 516 /// 517 /// This value is used when parsing default function arguments, for which 518 /// we would like to provide diagnostics (e.g., passing non-POD arguments 519 /// through varargs) but do not want to mark declarations as "referenced" 520 /// until the default argument is used. 521 PotentiallyEvaluatedIfUsed 522 }; 523 524 /// \brief Data structure used to record current or nested 525 /// expression evaluation contexts. 526 struct ExpressionEvaluationContextRecord { 527 /// \brief The expression evaluation context. 528 ExpressionEvaluationContext Context; 529 530 /// \brief The number of temporaries that were active when we 531 /// entered this expression evaluation context. 532 unsigned NumTemporaries; 533 534 /// \brief The set of declarations referenced within a 535 /// potentially potentially-evaluated context. 536 /// 537 /// When leaving a potentially potentially-evaluated context, each 538 /// of these elements will be as referenced if the corresponding 539 /// potentially potentially evaluated expression is potentially 540 /// evaluated. 541 PotentiallyReferencedDecls *PotentiallyReferenced; 542 543 /// \brief The set of diagnostics to emit should this potentially 544 /// potentially-evaluated context become evaluated. 545 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 546 547 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 548 unsigned NumTemporaries) 549 : Context(Context), NumTemporaries(NumTemporaries), 550 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 551 552 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 553 if (!PotentiallyReferenced) 554 PotentiallyReferenced = new PotentiallyReferencedDecls; 555 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 556 } 557 558 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 559 if (!PotentiallyDiagnosed) 560 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 561 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 562 } 563 564 void Destroy() { 565 delete PotentiallyReferenced; 566 delete PotentiallyDiagnosed; 567 PotentiallyReferenced = 0; 568 PotentiallyDiagnosed = 0; 569 } 570 }; 571 572 /// A stack of expression evaluation contexts. 573 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 574 575 /// \brief Whether the code handled by Sema should be considered a 576 /// complete translation unit or not. 577 /// 578 /// When true (which is generally the case), Sema will perform 579 /// end-of-translation-unit semantic tasks (such as creating 580 /// initializers for tentative definitions in C) once parsing has 581 /// completed. This flag will be false when building PCH files, 582 /// since a PCH file is by definition not a complete translation 583 /// unit. 584 bool CompleteTranslationUnit; 585 586 llvm::BumpPtrAllocator BumpAlloc; 587 588 /// \brief The number of SFINAE diagnostics that have been trapped. 589 unsigned NumSFINAEErrors; 590 591 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 592 UnparsedDefaultArgInstantiationsMap; 593 594 /// \brief A mapping from parameters with unparsed default arguments to the 595 /// set of instantiations of each parameter. 596 /// 597 /// This mapping is a temporary data structure used when parsing 598 /// nested class templates or nested classes of class templates, 599 /// where we might end up instantiating an inner class before the 600 /// default arguments of its methods have been parsed. 601 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 602 603 // Contains the locations of the beginning of unparsed default 604 // argument locations. 605 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 606 607 /// UndefinedInternals - all the used, undefined objects with 608 /// internal linkage in this translation unit. 609 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 610 611 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 612 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 613 614 /// Method Pool - allows efficient lookup when typechecking messages to "id". 615 /// We need to maintain a list, since selectors can have differing signatures 616 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 617 /// of selectors are "overloaded"). 618 GlobalMethodPool MethodPool; 619 620 /// Method selectors used in a @selector expression. Used for implementation 621 /// of -Wselector. 622 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 623 624 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 625 626 /// Private Helper predicate to check for 'self'. 627 bool isSelfExpr(Expr *RExpr); 628public: 629 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 630 bool CompleteTranslationUnit = true, 631 CodeCompleteConsumer *CompletionConsumer = 0); 632 ~Sema(); 633 634 /// \brief Perform initialization that occurs after the parser has been 635 /// initialized but before it parses anything. 636 void Initialize(); 637 638 const LangOptions &getLangOptions() const { return LangOpts; } 639 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 640 FPOptions &getFPOptions() { return FPFeatures; } 641 642 Diagnostic &getDiagnostics() const { return Diags; } 643 SourceManager &getSourceManager() const { return SourceMgr; } 644 const TargetAttributesSema &getTargetAttributesSema() const; 645 Preprocessor &getPreprocessor() const { return PP; } 646 ASTContext &getASTContext() const { return Context; } 647 ASTConsumer &getASTConsumer() const { return Consumer; } 648 649 /// \brief Helper class that creates diagnostics with optional 650 /// template instantiation stacks. 651 /// 652 /// This class provides a wrapper around the basic DiagnosticBuilder 653 /// class that emits diagnostics. SemaDiagnosticBuilder is 654 /// responsible for emitting the diagnostic (as DiagnosticBuilder 655 /// does) and, if the diagnostic comes from inside a template 656 /// instantiation, printing the template instantiation stack as 657 /// well. 658 class SemaDiagnosticBuilder : public DiagnosticBuilder { 659 Sema &SemaRef; 660 unsigned DiagID; 661 662 public: 663 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 664 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 665 666 explicit SemaDiagnosticBuilder(Sema &SemaRef) 667 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 668 669 ~SemaDiagnosticBuilder(); 670 }; 671 672 /// \brief Emit a diagnostic. 673 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 674 675 /// \brief Emit a partial diagnostic. 676 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 677 678 /// \brief Build a partial diagnostic. 679 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 680 681 ExprResult Owned(Expr* E) { return E; } 682 ExprResult Owned(ExprResult R) { return R; } 683 StmtResult Owned(Stmt* S) { return S; } 684 685 void ActOnEndOfTranslationUnit(); 686 687 Scope *getScopeForContext(DeclContext *Ctx); 688 689 void PushFunctionScope(); 690 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 691 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 692 const Decl *D = 0, const BlockExpr *blkExpr = 0); 693 694 sema::FunctionScopeInfo *getCurFunction() const { 695 return FunctionScopes.back(); 696 } 697 698 bool hasAnyErrorsInThisFunction() const; 699 700 /// \brief Retrieve the current block, if any. 701 sema::BlockScopeInfo *getCurBlock(); 702 703 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 704 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 705 706 //===--------------------------------------------------------------------===// 707 // Type Analysis / Processing: SemaType.cpp. 708 // 709 710 QualType adjustParameterType(QualType T); 711 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 712 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 713 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 714 } 715 QualType BuildPointerType(QualType T, 716 SourceLocation Loc, DeclarationName Entity); 717 QualType BuildReferenceType(QualType T, bool LValueRef, 718 SourceLocation Loc, DeclarationName Entity); 719 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 720 Expr *ArraySize, unsigned Quals, 721 SourceRange Brackets, DeclarationName Entity); 722 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 723 SourceLocation AttrLoc); 724 QualType BuildFunctionType(QualType T, 725 QualType *ParamTypes, unsigned NumParamTypes, 726 bool Variadic, unsigned Quals, 727 RefQualifierKind RefQualifier, 728 SourceLocation Loc, DeclarationName Entity, 729 FunctionType::ExtInfo Info); 730 QualType BuildMemberPointerType(QualType T, QualType Class, 731 SourceLocation Loc, 732 DeclarationName Entity); 733 QualType BuildBlockPointerType(QualType T, 734 SourceLocation Loc, DeclarationName Entity); 735 QualType BuildParenType(QualType T); 736 737 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 738 TagDecl **OwnedDecl = 0, 739 bool AllowAutoInTypeName = false); 740 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 741 TypeSourceInfo *ReturnTypeInfo); 742 /// \brief Package the given type and TSI into a ParsedType. 743 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 744 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 745 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 746 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 747 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 748 bool CheckDistantExceptionSpec(QualType T); 749 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 750 bool CheckEquivalentExceptionSpec( 751 const FunctionProtoType *Old, SourceLocation OldLoc, 752 const FunctionProtoType *New, SourceLocation NewLoc); 753 bool CheckEquivalentExceptionSpec( 754 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 755 const FunctionProtoType *Old, SourceLocation OldLoc, 756 const FunctionProtoType *New, SourceLocation NewLoc, 757 bool *MissingExceptionSpecification = 0, 758 bool *MissingEmptyExceptionSpecification = 0); 759 bool CheckExceptionSpecSubset( 760 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 761 const FunctionProtoType *Superset, SourceLocation SuperLoc, 762 const FunctionProtoType *Subset, SourceLocation SubLoc); 763 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 764 const FunctionProtoType *Target, SourceLocation TargetLoc, 765 const FunctionProtoType *Source, SourceLocation SourceLoc); 766 767 TypeResult ActOnTypeName(Scope *S, Declarator &D); 768 769 bool RequireCompleteType(SourceLocation Loc, QualType T, 770 const PartialDiagnostic &PD, 771 std::pair<SourceLocation, PartialDiagnostic> Note); 772 bool RequireCompleteType(SourceLocation Loc, QualType T, 773 const PartialDiagnostic &PD); 774 bool RequireCompleteType(SourceLocation Loc, QualType T, 775 unsigned DiagID); 776 777 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 778 const CXXScopeSpec &SS, QualType T); 779 780 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 781 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 782 783 //===--------------------------------------------------------------------===// 784 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 785 // 786 787 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 788 789 void DiagnoseUseOfUnimplementedSelectors(); 790 791 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 792 Scope *S, CXXScopeSpec *SS = 0, 793 bool isClassName = false, 794 bool HasTrailingDot = false, 795 ParsedType ObjectType = ParsedType(), 796 bool WantNontrivialTypeSourceInfo = false); 797 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 798 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 799 SourceLocation IILoc, 800 Scope *S, 801 CXXScopeSpec *SS, 802 ParsedType &SuggestedType); 803 804 Decl *ActOnDeclarator(Scope *S, Declarator &D); 805 806 Decl *HandleDeclarator(Scope *S, Declarator &D, 807 MultiTemplateParamsArg TemplateParameterLists, 808 bool IsFunctionDefinition); 809 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 810 const LookupResult &Previous, 811 Scope *S); 812 void DiagnoseFunctionSpecifiers(Declarator& D); 813 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 814 void CheckShadow(Scope *S, VarDecl *D); 815 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 816 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 817 QualType R, TypeSourceInfo *TInfo, 818 LookupResult &Previous, bool &Redeclaration); 819 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 820 QualType R, TypeSourceInfo *TInfo, 821 LookupResult &Previous, 822 MultiTemplateParamsArg TemplateParamLists, 823 bool &Redeclaration); 824 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 825 bool &Redeclaration); 826 void CheckCompleteVariableDeclaration(VarDecl *var); 827 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 828 QualType R, TypeSourceInfo *TInfo, 829 LookupResult &Previous, 830 MultiTemplateParamsArg TemplateParamLists, 831 bool IsFunctionDefinition, 832 bool &Redeclaration); 833 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 834 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 835 void CheckFunctionDeclaration(Scope *S, 836 FunctionDecl *NewFD, LookupResult &Previous, 837 bool IsExplicitSpecialization, 838 bool &Redeclaration); 839 void CheckMain(FunctionDecl *FD); 840 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 841 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 842 SourceLocation Loc, 843 QualType T); 844 ParmVarDecl *CheckParameter(DeclContext *DC, 845 TypeSourceInfo *TSInfo, QualType T, 846 IdentifierInfo *Name, 847 SourceLocation NameLoc, 848 StorageClass SC, 849 StorageClass SCAsWritten); 850 void ActOnParamDefaultArgument(Decl *param, 851 SourceLocation EqualLoc, 852 Expr *defarg); 853 void ActOnParamUnparsedDefaultArgument(Decl *param, 854 SourceLocation EqualLoc, 855 SourceLocation ArgLoc); 856 void ActOnParamDefaultArgumentError(Decl *param); 857 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 858 SourceLocation EqualLoc); 859 860 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 861 bool TypeMayContainAuto); 862 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 863 void ActOnInitializerError(Decl *Dcl); 864 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 865 void FinalizeDeclaration(Decl *D); 866 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 867 Decl **Group, 868 unsigned NumDecls); 869 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 870 bool TypeMayContainAuto = true); 871 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 872 SourceLocation LocAfterDecls); 873 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 874 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 875 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 876 877 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 878 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 879 880 /// \brief Diagnose any unused parameters in the given sequence of 881 /// ParmVarDecl pointers. 882 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 883 ParmVarDecl * const *End); 884 885 /// \brief Diagnose whether the size of parameters or return value of a 886 /// function or obj-c method definition is pass-by-value and larger than a 887 /// specified threshold. 888 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 889 ParmVarDecl * const *End, 890 QualType ReturnTy, 891 NamedDecl *D); 892 893 void DiagnoseInvalidJumps(Stmt *Body); 894 Decl *ActOnFileScopeAsmDecl(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 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0); 1062 1063 /// Finds the scope corresponding to the given decl context, if it 1064 /// happens to be an enclosing scope. Otherwise return NULL. 1065 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1066 1067 /// Subroutines of ActOnDeclarator(). 1068 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1069 TypeSourceInfo *TInfo); 1070 void MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls); 1071 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1072 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1073 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1074 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1075 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1076 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1077 1078 // AssignmentAction - This is used by all the assignment diagnostic functions 1079 // to represent what is actually causing the operation 1080 enum AssignmentAction { 1081 AA_Assigning, 1082 AA_Passing, 1083 AA_Returning, 1084 AA_Converting, 1085 AA_Initializing, 1086 AA_Sending, 1087 AA_Casting 1088 }; 1089 1090 /// C++ Overloading. 1091 enum OverloadKind { 1092 /// This is a legitimate overload: the existing declarations are 1093 /// functions or function templates with different signatures. 1094 Ovl_Overload, 1095 1096 /// This is not an overload because the signature exactly matches 1097 /// an existing declaration. 1098 Ovl_Match, 1099 1100 /// This is not an overload because the lookup results contain a 1101 /// non-function. 1102 Ovl_NonFunction 1103 }; 1104 OverloadKind CheckOverload(Scope *S, 1105 FunctionDecl *New, 1106 const LookupResult &OldDecls, 1107 NamedDecl *&OldDecl, 1108 bool IsForUsingDecl); 1109 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1110 1111 bool TryImplicitConversion(InitializationSequence &Sequence, 1112 const InitializedEntity &Entity, 1113 Expr *From, 1114 bool SuppressUserConversions, 1115 bool AllowExplicit, 1116 bool InOverloadResolution, 1117 bool CStyle); 1118 1119 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1120 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1121 bool IsComplexPromotion(QualType FromType, QualType ToType); 1122 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1123 bool InOverloadResolution, 1124 QualType& ConvertedType, bool &IncompatibleObjC); 1125 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1126 QualType& ConvertedType, bool &IncompatibleObjC); 1127 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1128 QualType& ConvertedType); 1129 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1130 const FunctionProtoType *NewType); 1131 1132 bool CheckPointerConversion(Expr *From, QualType ToType, 1133 CastKind &Kind, 1134 CXXCastPath& BasePath, 1135 bool IgnoreBaseAccess); 1136 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1137 bool InOverloadResolution, 1138 QualType &ConvertedType); 1139 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1140 CastKind &Kind, 1141 CXXCastPath &BasePath, 1142 bool IgnoreBaseAccess); 1143 bool IsQualificationConversion(QualType FromType, QualType ToType, 1144 bool CStyle); 1145 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1146 1147 1148 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1149 const VarDecl *NRVOCandidate, 1150 QualType ResultType, 1151 Expr *Value); 1152 1153 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1154 SourceLocation EqualLoc, 1155 ExprResult Init); 1156 bool PerformObjectArgumentInitialization(Expr *&From, 1157 NestedNameSpecifier *Qualifier, 1158 NamedDecl *FoundDecl, 1159 CXXMethodDecl *Method); 1160 1161 bool PerformContextuallyConvertToBool(Expr *&From); 1162 bool PerformContextuallyConvertToObjCId(Expr *&From); 1163 1164 ExprResult 1165 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1166 const PartialDiagnostic &NotIntDiag, 1167 const PartialDiagnostic &IncompleteDiag, 1168 const PartialDiagnostic &ExplicitConvDiag, 1169 const PartialDiagnostic &ExplicitConvNote, 1170 const PartialDiagnostic &AmbigDiag, 1171 const PartialDiagnostic &AmbigNote, 1172 const PartialDiagnostic &ConvDiag); 1173 1174 bool PerformObjectMemberConversion(Expr *&From, 1175 NestedNameSpecifier *Qualifier, 1176 NamedDecl *FoundDecl, 1177 NamedDecl *Member); 1178 1179 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1180 // TODO: make this is a typesafe union. 1181 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1182 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1183 1184 void AddOverloadCandidate(NamedDecl *Function, 1185 DeclAccessPair FoundDecl, 1186 Expr **Args, unsigned NumArgs, 1187 OverloadCandidateSet &CandidateSet); 1188 1189 void AddOverloadCandidate(FunctionDecl *Function, 1190 DeclAccessPair FoundDecl, 1191 Expr **Args, unsigned NumArgs, 1192 OverloadCandidateSet& CandidateSet, 1193 bool SuppressUserConversions = false, 1194 bool PartialOverloading = false); 1195 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1196 Expr **Args, unsigned NumArgs, 1197 OverloadCandidateSet& CandidateSet, 1198 bool SuppressUserConversions = false); 1199 void AddMethodCandidate(DeclAccessPair FoundDecl, 1200 QualType ObjectType, 1201 Expr::Classification ObjectClassification, 1202 Expr **Args, unsigned NumArgs, 1203 OverloadCandidateSet& CandidateSet, 1204 bool SuppressUserConversion = false); 1205 void AddMethodCandidate(CXXMethodDecl *Method, 1206 DeclAccessPair FoundDecl, 1207 CXXRecordDecl *ActingContext, QualType ObjectType, 1208 Expr::Classification ObjectClassification, 1209 Expr **Args, unsigned NumArgs, 1210 OverloadCandidateSet& CandidateSet, 1211 bool SuppressUserConversions = false); 1212 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1213 DeclAccessPair FoundDecl, 1214 CXXRecordDecl *ActingContext, 1215 TemplateArgumentListInfo *ExplicitTemplateArgs, 1216 QualType ObjectType, 1217 Expr::Classification ObjectClassification, 1218 Expr **Args, unsigned NumArgs, 1219 OverloadCandidateSet& CandidateSet, 1220 bool SuppressUserConversions = false); 1221 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1222 DeclAccessPair FoundDecl, 1223 TemplateArgumentListInfo *ExplicitTemplateArgs, 1224 Expr **Args, unsigned NumArgs, 1225 OverloadCandidateSet& CandidateSet, 1226 bool SuppressUserConversions = false); 1227 void AddConversionCandidate(CXXConversionDecl *Conversion, 1228 DeclAccessPair FoundDecl, 1229 CXXRecordDecl *ActingContext, 1230 Expr *From, QualType ToType, 1231 OverloadCandidateSet& CandidateSet); 1232 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1233 DeclAccessPair FoundDecl, 1234 CXXRecordDecl *ActingContext, 1235 Expr *From, QualType ToType, 1236 OverloadCandidateSet &CandidateSet); 1237 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1238 DeclAccessPair FoundDecl, 1239 CXXRecordDecl *ActingContext, 1240 const FunctionProtoType *Proto, 1241 Expr *Object, Expr **Args, unsigned NumArgs, 1242 OverloadCandidateSet& CandidateSet); 1243 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1244 SourceLocation OpLoc, 1245 Expr **Args, unsigned NumArgs, 1246 OverloadCandidateSet& CandidateSet, 1247 SourceRange OpRange = SourceRange()); 1248 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1249 Expr **Args, unsigned NumArgs, 1250 OverloadCandidateSet& CandidateSet, 1251 bool IsAssignmentOperator = false, 1252 unsigned NumContextualBoolArguments = 0); 1253 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1254 SourceLocation OpLoc, 1255 Expr **Args, unsigned NumArgs, 1256 OverloadCandidateSet& CandidateSet); 1257 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1258 bool Operator, 1259 Expr **Args, unsigned NumArgs, 1260 TemplateArgumentListInfo *ExplicitTemplateArgs, 1261 OverloadCandidateSet& CandidateSet, 1262 bool PartialOverloading = false); 1263 1264 // Emit as a 'note' the specific overload candidate 1265 void NoteOverloadCandidate(FunctionDecl *Fn); 1266 1267 // Emit as a series of 'note's all template and non-templates 1268 // identified by the expression Expr 1269 void NoteAllOverloadCandidates(Expr* E); 1270 1271 // [PossiblyAFunctionType] --> [Return] 1272 // NonFunctionType --> NonFunctionType 1273 // R (A) --> R(A) 1274 // R (*)(A) --> R (A) 1275 // R (&)(A) --> R (A) 1276 // R (S::*)(A) --> R (A) 1277 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1278 1279 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1280 bool Complain, 1281 DeclAccessPair &Found); 1282 1283 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1284 bool Complain = false, 1285 DeclAccessPair* Found = 0); 1286 1287 Expr *FixOverloadedFunctionReference(Expr *E, 1288 DeclAccessPair FoundDecl, 1289 FunctionDecl *Fn); 1290 ExprResult FixOverloadedFunctionReference(ExprResult, 1291 DeclAccessPair FoundDecl, 1292 FunctionDecl *Fn); 1293 1294 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1295 Expr **Args, unsigned NumArgs, 1296 OverloadCandidateSet &CandidateSet, 1297 bool PartialOverloading = false); 1298 1299 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1300 UnresolvedLookupExpr *ULE, 1301 SourceLocation LParenLoc, 1302 Expr **Args, unsigned NumArgs, 1303 SourceLocation RParenLoc, 1304 Expr *ExecConfig); 1305 1306 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1307 unsigned Opc, 1308 const UnresolvedSetImpl &Fns, 1309 Expr *input); 1310 1311 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1312 unsigned Opc, 1313 const UnresolvedSetImpl &Fns, 1314 Expr *LHS, Expr *RHS); 1315 1316 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1317 SourceLocation RLoc, 1318 Expr *Base,Expr *Idx); 1319 1320 ExprResult 1321 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1322 SourceLocation LParenLoc, Expr **Args, 1323 unsigned NumArgs, SourceLocation RParenLoc); 1324 ExprResult 1325 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1326 Expr **Args, unsigned NumArgs, 1327 SourceLocation RParenLoc); 1328 1329 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1330 SourceLocation OpLoc); 1331 1332 /// CheckCallReturnType - Checks that a call expression's return type is 1333 /// complete. Returns true on failure. The location passed in is the location 1334 /// that best represents the call. 1335 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1336 CallExpr *CE, FunctionDecl *FD); 1337 1338 /// Helpers for dealing with blocks and functions. 1339 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1340 bool CheckParameterNames); 1341 void CheckCXXDefaultArguments(FunctionDecl *FD); 1342 void CheckExtraCXXDefaultArguments(Declarator &D); 1343 Scope *getNonFieldDeclScope(Scope *S); 1344 1345 /// \name Name lookup 1346 /// 1347 /// These routines provide name lookup that is used during semantic 1348 /// analysis to resolve the various kinds of names (identifiers, 1349 /// overloaded operator names, constructor names, etc.) into zero or 1350 /// more declarations within a particular scope. The major entry 1351 /// points are LookupName, which performs unqualified name lookup, 1352 /// and LookupQualifiedName, which performs qualified name lookup. 1353 /// 1354 /// All name lookup is performed based on some specific criteria, 1355 /// which specify what names will be visible to name lookup and how 1356 /// far name lookup should work. These criteria are important both 1357 /// for capturing language semantics (certain lookups will ignore 1358 /// certain names, for example) and for performance, since name 1359 /// lookup is often a bottleneck in the compilation of C++. Name 1360 /// lookup criteria is specified via the LookupCriteria enumeration. 1361 /// 1362 /// The results of name lookup can vary based on the kind of name 1363 /// lookup performed, the current language, and the translation 1364 /// unit. In C, for example, name lookup will either return nothing 1365 /// (no entity found) or a single declaration. In C++, name lookup 1366 /// can additionally refer to a set of overloaded functions or 1367 /// result in an ambiguity. All of the possible results of name 1368 /// lookup are captured by the LookupResult class, which provides 1369 /// the ability to distinguish among them. 1370 //@{ 1371 1372 /// @brief Describes the kind of name lookup to perform. 1373 enum LookupNameKind { 1374 /// Ordinary name lookup, which finds ordinary names (functions, 1375 /// variables, typedefs, etc.) in C and most kinds of names 1376 /// (functions, variables, members, types, etc.) in C++. 1377 LookupOrdinaryName = 0, 1378 /// Tag name lookup, which finds the names of enums, classes, 1379 /// structs, and unions. 1380 LookupTagName, 1381 /// Label name lookup. 1382 LookupLabel, 1383 /// Member name lookup, which finds the names of 1384 /// class/struct/union members. 1385 LookupMemberName, 1386 /// Look up of an operator name (e.g., operator+) for use with 1387 /// operator overloading. This lookup is similar to ordinary name 1388 /// lookup, but will ignore any declarations that are class members. 1389 LookupOperatorName, 1390 /// Look up of a name that precedes the '::' scope resolution 1391 /// operator in C++. This lookup completely ignores operator, object, 1392 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1393 LookupNestedNameSpecifierName, 1394 /// Look up a namespace name within a C++ using directive or 1395 /// namespace alias definition, ignoring non-namespace names (C++ 1396 /// [basic.lookup.udir]p1). 1397 LookupNamespaceName, 1398 /// Look up all declarations in a scope with the given name, 1399 /// including resolved using declarations. This is appropriate 1400 /// for checking redeclarations for a using declaration. 1401 LookupUsingDeclName, 1402 /// Look up an ordinary name that is going to be redeclared as a 1403 /// name with linkage. This lookup ignores any declarations that 1404 /// are outside of the current scope unless they have linkage. See 1405 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1406 LookupRedeclarationWithLinkage, 1407 /// Look up the name of an Objective-C protocol. 1408 LookupObjCProtocolName, 1409 /// \brief Look up any declaration with any name. 1410 LookupAnyName 1411 }; 1412 1413 /// \brief Specifies whether (or how) name lookup is being performed for a 1414 /// redeclaration (vs. a reference). 1415 enum RedeclarationKind { 1416 /// \brief The lookup is a reference to this name that is not for the 1417 /// purpose of redeclaring the name. 1418 NotForRedeclaration = 0, 1419 /// \brief The lookup results will be used for redeclaration of a name, 1420 /// if an entity by that name already exists. 1421 ForRedeclaration 1422 }; 1423 1424private: 1425 bool CppLookupName(LookupResult &R, Scope *S); 1426 1427public: 1428 /// \brief Look up a name, looking for a single declaration. Return 1429 /// null if the results were absent, ambiguous, or overloaded. 1430 /// 1431 /// It is preferable to use the elaborated form and explicitly handle 1432 /// ambiguity and overloaded. 1433 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1434 SourceLocation Loc, 1435 LookupNameKind NameKind, 1436 RedeclarationKind Redecl 1437 = NotForRedeclaration); 1438 bool LookupName(LookupResult &R, Scope *S, 1439 bool AllowBuiltinCreation = false); 1440 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1441 bool InUnqualifiedLookup = false); 1442 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1443 bool AllowBuiltinCreation = false, 1444 bool EnteringContext = false); 1445 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1446 1447 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1448 QualType T1, QualType T2, 1449 UnresolvedSetImpl &Functions); 1450 1451 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation Loc, 1452 bool isLocalLabel = false); 1453 1454 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1455 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1456 1457 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1458 Expr **Args, unsigned NumArgs, 1459 ADLResult &Functions); 1460 1461 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1462 VisibleDeclConsumer &Consumer, 1463 bool IncludeGlobalScope = true); 1464 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1465 VisibleDeclConsumer &Consumer, 1466 bool IncludeGlobalScope = true); 1467 1468 /// \brief The context in which typo-correction occurs. 1469 /// 1470 /// The typo-correction context affects which keywords (if any) are 1471 /// considered when trying to correct for typos. 1472 enum CorrectTypoContext { 1473 /// \brief An unknown context, where any keyword might be valid. 1474 CTC_Unknown, 1475 /// \brief A context where no keywords are used (e.g. we expect an actual 1476 /// name). 1477 CTC_NoKeywords, 1478 /// \brief A context where we're correcting a type name. 1479 CTC_Type, 1480 /// \brief An expression context. 1481 CTC_Expression, 1482 /// \brief A type cast, or anything else that can be followed by a '<'. 1483 CTC_CXXCasts, 1484 /// \brief A member lookup context. 1485 CTC_MemberLookup, 1486 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1487 CTC_ObjCIvarLookup, 1488 /// \brief An Objective-C property lookup context (e.g., self.prop). 1489 CTC_ObjCPropertyLookup, 1490 /// \brief The receiver of an Objective-C message send within an 1491 /// Objective-C method where 'super' is a valid keyword. 1492 CTC_ObjCMessageReceiver 1493 }; 1494 1495 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1496 DeclContext *MemberContext = 0, 1497 bool EnteringContext = false, 1498 CorrectTypoContext CTC = CTC_Unknown, 1499 const ObjCObjectPointerType *OPT = 0); 1500 1501 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1502 AssociatedNamespaceSet &AssociatedNamespaces, 1503 AssociatedClassSet &AssociatedClasses); 1504 1505 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1506 //@} 1507 1508 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1509 SourceLocation IdLoc, 1510 bool TypoCorrection = false); 1511 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1512 Scope *S, bool ForRedeclaration, 1513 SourceLocation Loc); 1514 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1515 Scope *S); 1516 void AddKnownFunctionAttributes(FunctionDecl *FD); 1517 1518 // More parsing and symbol table subroutines. 1519 1520 // Decl attributes - this routine is the top level dispatcher. 1521 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1522 bool NonInheritable = true, bool Inheritable = true); 1523 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1524 bool NonInheritable = true, bool Inheritable = true); 1525 1526 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1527 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1528 bool CheckNoReturnAttr(const AttributeList &attr); 1529 1530 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1531 bool &IncompleteImpl, unsigned DiagID); 1532 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1533 ObjCMethodDecl *MethodDecl, 1534 bool IsProtocolMethodDecl); 1535 1536 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1537 ObjCInterfaceDecl *IDecl); 1538 1539 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1540 1541 /// CheckProtocolMethodDefs - This routine checks unimplemented 1542 /// methods declared in protocol, and those referenced by it. 1543 /// \param IDecl - Used for checking for methods which may have been 1544 /// inherited. 1545 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1546 ObjCProtocolDecl *PDecl, 1547 bool& IncompleteImpl, 1548 const SelectorSet &InsMap, 1549 const SelectorSet &ClsMap, 1550 ObjCContainerDecl *CDecl); 1551 1552 /// CheckImplementationIvars - This routine checks if the instance variables 1553 /// listed in the implelementation match those listed in the interface. 1554 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1555 ObjCIvarDecl **Fields, unsigned nIvars, 1556 SourceLocation Loc); 1557 1558 /// \brief Determine whether we can synthesize a provisional ivar for the 1559 /// given name. 1560 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1561 1562 /// \brief Determine whether we can synthesize a provisional ivar for the 1563 /// given property. 1564 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1565 1566 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1567 /// remains unimplemented in the class or category @implementation. 1568 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1569 ObjCContainerDecl* IDecl, 1570 bool IncompleteImpl = false); 1571 1572 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1573 /// which must be implemented by this implementation. 1574 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1575 ObjCContainerDecl *CDecl, 1576 const SelectorSet &InsMap); 1577 1578 /// DefaultSynthesizeProperties - This routine default synthesizes all 1579 /// properties which must be synthesized in class's @implementation. 1580 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1581 ObjCInterfaceDecl *IDecl); 1582 1583 /// CollectImmediateProperties - This routine collects all properties in 1584 /// the class and its conforming protocols; but not those it its super class. 1585 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1586 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1587 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1588 1589 1590 /// LookupPropertyDecl - Looks up a property in the current class and all 1591 /// its protocols. 1592 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1593 IdentifierInfo *II); 1594 1595 /// Called by ActOnProperty to handle @property declarations in 1596 //// class extensions. 1597 Decl *HandlePropertyInClassExtension(Scope *S, 1598 ObjCCategoryDecl *CDecl, 1599 SourceLocation AtLoc, 1600 FieldDeclarator &FD, 1601 Selector GetterSel, 1602 Selector SetterSel, 1603 const bool isAssign, 1604 const bool isReadWrite, 1605 const unsigned Attributes, 1606 bool *isOverridingProperty, 1607 TypeSourceInfo *T, 1608 tok::ObjCKeywordKind MethodImplKind); 1609 1610 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1611 /// handle creating the ObjcPropertyDecl for a category or @interface. 1612 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1613 ObjCContainerDecl *CDecl, 1614 SourceLocation AtLoc, 1615 FieldDeclarator &FD, 1616 Selector GetterSel, 1617 Selector SetterSel, 1618 const bool isAssign, 1619 const bool isReadWrite, 1620 const unsigned Attributes, 1621 TypeSourceInfo *T, 1622 tok::ObjCKeywordKind MethodImplKind, 1623 DeclContext *lexicalDC = 0); 1624 1625 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1626 /// warning) when atomic property has one but not the other user-declared 1627 /// setter or getter. 1628 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1629 ObjCContainerDecl* IDecl); 1630 1631 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1632 1633 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1634 /// true, or false, accordingly. 1635 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1636 const ObjCMethodDecl *PrevMethod, 1637 bool matchBasedOnSizeAndAlignment = false, 1638 bool matchBasedOnStrictEqulity = false); 1639 1640 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1641 /// or protocol against those declared in their implementations. 1642 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1643 const SelectorSet &ClsMap, 1644 SelectorSet &InsMapSeen, 1645 SelectorSet &ClsMapSeen, 1646 ObjCImplDecl* IMPDecl, 1647 ObjCContainerDecl* IDecl, 1648 bool &IncompleteImpl, 1649 bool ImmediateClass); 1650 1651private: 1652 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1653 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1654 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1655 1656 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1657 /// optionally warns if there are multiple signatures. 1658 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1659 bool receiverIdOrClass, 1660 bool warn, bool instance); 1661 1662public: 1663 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1664 /// unit are added to a global pool. This allows us to efficiently associate 1665 /// a selector with a method declaraation for purposes of typechecking 1666 /// messages sent to "id" (where the class of the object is unknown). 1667 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1668 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1669 } 1670 1671 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1672 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1673 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1674 } 1675 1676 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1677 /// there are multiple signatures. 1678 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1679 bool receiverIdOrClass=false, 1680 bool warn=true) { 1681 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1682 warn, /*instance*/true); 1683 } 1684 1685 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1686 /// there are multiple signatures. 1687 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1688 bool receiverIdOrClass=false, 1689 bool warn=true) { 1690 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1691 warn, /*instance*/false); 1692 } 1693 1694 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1695 /// implementation. 1696 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1697 1698 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1699 /// initialization. 1700 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1701 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1702 //===--------------------------------------------------------------------===// 1703 // Statement Parsing Callbacks: SemaStmt.cpp. 1704public: 1705 class FullExprArg { 1706 public: 1707 FullExprArg(Sema &actions) : E(0) { } 1708 1709 // FIXME: The const_cast here is ugly. RValue references would make this 1710 // much nicer (or we could duplicate a bunch of the move semantics 1711 // emulation code from Ownership.h). 1712 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1713 1714 ExprResult release() { 1715 return move(E); 1716 } 1717 1718 Expr *get() const { return E; } 1719 1720 Expr *operator->() { 1721 return E; 1722 } 1723 1724 private: 1725 // FIXME: No need to make the entire Sema class a friend when it's just 1726 // Sema::MakeFullExpr that needs access to the constructor below. 1727 friend class Sema; 1728 1729 explicit FullExprArg(Expr *expr) : E(expr) {} 1730 1731 Expr *E; 1732 }; 1733 1734 FullExprArg MakeFullExpr(Expr *Arg) { 1735 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1736 } 1737 1738 StmtResult ActOnExprStmt(FullExprArg Expr); 1739 1740 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1741 bool LeadingEmptyMacro = false); 1742 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1743 MultiStmtArg Elts, 1744 bool isStmtExpr); 1745 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1746 SourceLocation StartLoc, 1747 SourceLocation EndLoc); 1748 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1749 StmtResult ActOnForEachLValueExpr(Expr *E); 1750 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1751 SourceLocation DotDotDotLoc, Expr *RHSVal, 1752 SourceLocation ColonLoc); 1753 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1754 1755 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1756 SourceLocation ColonLoc, 1757 Stmt *SubStmt, Scope *CurScope); 1758 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1759 SourceLocation ColonLoc, Stmt *SubStmt); 1760 1761 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1762 FullExprArg CondVal, Decl *CondVar, 1763 Stmt *ThenVal, 1764 SourceLocation ElseLoc, Stmt *ElseVal); 1765 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1766 Expr *Cond, 1767 Decl *CondVar); 1768 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1769 Stmt *Switch, Stmt *Body); 1770 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1771 FullExprArg Cond, 1772 Decl *CondVar, Stmt *Body); 1773 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1774 SourceLocation WhileLoc, 1775 SourceLocation CondLParen, Expr *Cond, 1776 SourceLocation CondRParen); 1777 1778 StmtResult ActOnForStmt(SourceLocation ForLoc, 1779 SourceLocation LParenLoc, 1780 Stmt *First, FullExprArg Second, 1781 Decl *SecondVar, 1782 FullExprArg Third, 1783 SourceLocation RParenLoc, 1784 Stmt *Body); 1785 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1786 SourceLocation LParenLoc, 1787 Stmt *First, Expr *Second, 1788 SourceLocation RParenLoc, Stmt *Body); 1789 1790 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1791 SourceLocation LabelLoc, 1792 LabelDecl *TheDecl); 1793 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1794 SourceLocation StarLoc, 1795 Expr *DestExp); 1796 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1797 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1798 1799 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1800 bool AllowFunctionParameters); 1801 1802 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1803 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1804 1805 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1806 bool IsSimple, bool IsVolatile, 1807 unsigned NumOutputs, unsigned NumInputs, 1808 IdentifierInfo **Names, 1809 MultiExprArg Constraints, 1810 MultiExprArg Exprs, 1811 Expr *AsmString, 1812 MultiExprArg Clobbers, 1813 SourceLocation RParenLoc, 1814 bool MSAsm = false); 1815 1816 1817 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1818 IdentifierInfo *Name, SourceLocation NameLoc, 1819 bool Invalid = false); 1820 1821 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1822 1823 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1824 Decl *Parm, Stmt *Body); 1825 1826 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1827 1828 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1829 MultiStmtArg Catch, Stmt *Finally); 1830 1831 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1832 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1833 Scope *CurScope); 1834 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1835 Expr *SynchExpr, 1836 Stmt *SynchBody); 1837 1838 VarDecl *BuildExceptionDeclaration(Scope *S, 1839 TypeSourceInfo *TInfo, 1840 IdentifierInfo *Name, 1841 SourceLocation Loc); 1842 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1843 1844 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1845 Decl *ExDecl, Stmt *HandlerBlock); 1846 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1847 MultiStmtArg Handlers); 1848 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1849 1850 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1851 1852 /// \brief If it's a file scoped decl that must warn if not used, keep track 1853 /// of it. 1854 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1855 1856 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1857 /// whose result is unused, warn. 1858 void DiagnoseUnusedExprResult(const Stmt *S); 1859 void DiagnoseUnusedDecl(const NamedDecl *ND); 1860 1861 ParsingDeclState PushParsingDeclaration() { 1862 return DelayedDiagnostics.pushParsingDecl(); 1863 } 1864 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 1865 DelayedDiagnostics::popParsingDecl(*this, state, decl); 1866 } 1867 1868 typedef ProcessingContextState ParsingClassState; 1869 ParsingClassState PushParsingClass() { 1870 return DelayedDiagnostics.pushContext(); 1871 } 1872 void PopParsingClass(ParsingClassState state) { 1873 DelayedDiagnostics.popContext(state); 1874 } 1875 1876 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1877 SourceLocation Loc, bool UnknownObjCClass=false); 1878 1879 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1880 1881 //===--------------------------------------------------------------------===// 1882 // Expression Parsing Callbacks: SemaExpr.cpp. 1883 1884 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1885 bool UnknownObjCClass=false); 1886 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1887 ObjCMethodDecl *Getter, 1888 SourceLocation Loc); 1889 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1890 Expr **Args, unsigned NumArgs); 1891 1892 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1893 1894 void PopExpressionEvaluationContext(); 1895 1896 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1897 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1898 void MarkDeclarationsReferencedInExpr(Expr *E); 1899 1900 /// \brief Conditionally issue a diagnostic based on the current 1901 /// evaluation context. 1902 /// 1903 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 1904 /// the function body is parsed, and then do a basic reachability analysis to 1905 /// determine if the statement is reachable. If it is unreachable, the 1906 /// diagnostic will not be emitted. 1907 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 1908 const PartialDiagnostic &PD); 1909 1910 // Primary Expressions. 1911 SourceRange getExprRange(Expr *E) const; 1912 1913 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1914 bool HasTrailingLParen, bool IsAddressOfOperand); 1915 1916 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1917 CorrectTypoContext CTC = CTC_Unknown); 1918 1919 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1920 bool AllowBuiltinCreation=false); 1921 1922 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1923 const DeclarationNameInfo &NameInfo, 1924 bool isAddressOfOperand, 1925 const TemplateArgumentListInfo *TemplateArgs); 1926 1927 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1928 ExprValueKind VK, 1929 SourceLocation Loc, 1930 const CXXScopeSpec *SS = 0); 1931 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1932 ExprValueKind VK, 1933 const DeclarationNameInfo &NameInfo, 1934 const CXXScopeSpec *SS = 0); 1935 ExprResult 1936 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 1937 SourceLocation nameLoc, 1938 IndirectFieldDecl *indirectField, 1939 Expr *baseObjectExpr = 0, 1940 SourceLocation opLoc = SourceLocation()); 1941 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1942 LookupResult &R, 1943 const TemplateArgumentListInfo *TemplateArgs); 1944 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1945 LookupResult &R, 1946 const TemplateArgumentListInfo *TemplateArgs, 1947 bool IsDefiniteInstance); 1948 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1949 const LookupResult &R, 1950 bool HasTrailingLParen); 1951 1952 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1953 const DeclarationNameInfo &NameInfo); 1954 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1955 const DeclarationNameInfo &NameInfo, 1956 const TemplateArgumentListInfo *TemplateArgs); 1957 1958 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1959 LookupResult &R, 1960 bool ADL); 1961 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1962 const DeclarationNameInfo &NameInfo, 1963 NamedDecl *D); 1964 1965 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 1966 ExprResult ActOnNumericConstant(const Token &); 1967 ExprResult ActOnCharacterConstant(const Token &); 1968 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 1969 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 1970 SourceLocation R, 1971 MultiExprArg Val, 1972 ParsedType TypeOfCast = ParsedType()); 1973 1974 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 1975 /// fragments (e.g. "foo" "bar" L"baz"). 1976 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 1977 1978 // Binary/Unary Operators. 'Tok' is the token for the operator. 1979 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 1980 Expr *InputArg); 1981 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 1982 UnaryOperatorKind Opc, Expr *input); 1983 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 1984 tok::TokenKind Op, Expr *Input); 1985 1986 ExprResult CreateSizeOfAlignOfExpr(TypeSourceInfo *T, 1987 SourceLocation OpLoc, 1988 bool isSizeOf, SourceRange R); 1989 ExprResult CreateSizeOfAlignOfExpr(Expr *E, SourceLocation OpLoc, 1990 bool isSizeOf, SourceRange R); 1991 ExprResult 1992 ActOnSizeOfAlignOfExpr(SourceLocation OpLoc, bool isSizeof, bool isType, 1993 void *TyOrEx, const SourceRange &ArgRange); 1994 1995 ExprResult CheckPlaceholderExpr(Expr *E, SourceLocation Loc); 1996 1997 bool CheckSizeOfAlignOfOperand(QualType type, SourceLocation OpLoc, 1998 SourceRange R, bool isSizeof); 1999 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2000 SourceLocation OpLoc, 2001 IdentifierInfo &Name, 2002 SourceLocation NameLoc, 2003 SourceLocation RParenLoc); 2004 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2005 tok::TokenKind Kind, Expr *Input); 2006 2007 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2008 Expr *Idx, SourceLocation RLoc); 2009 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2010 Expr *Idx, SourceLocation RLoc); 2011 2012 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2013 SourceLocation OpLoc, bool IsArrow, 2014 CXXScopeSpec &SS, 2015 NamedDecl *FirstQualifierInScope, 2016 const DeclarationNameInfo &NameInfo, 2017 const TemplateArgumentListInfo *TemplateArgs); 2018 2019 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2020 SourceLocation OpLoc, bool IsArrow, 2021 const CXXScopeSpec &SS, 2022 NamedDecl *FirstQualifierInScope, 2023 LookupResult &R, 2024 const TemplateArgumentListInfo *TemplateArgs, 2025 bool SuppressQualifierCheck = false); 2026 2027 ExprResult LookupMemberExpr(LookupResult &R, Expr *&Base, 2028 bool &IsArrow, SourceLocation OpLoc, 2029 CXXScopeSpec &SS, 2030 Decl *ObjCImpDecl, 2031 bool HasTemplateArgs); 2032 2033 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2034 const CXXScopeSpec &SS, 2035 const LookupResult &R); 2036 2037 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2038 bool IsArrow, SourceLocation OpLoc, 2039 const CXXScopeSpec &SS, 2040 NamedDecl *FirstQualifierInScope, 2041 const DeclarationNameInfo &NameInfo, 2042 const TemplateArgumentListInfo *TemplateArgs); 2043 2044 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2045 SourceLocation OpLoc, 2046 tok::TokenKind OpKind, 2047 CXXScopeSpec &SS, 2048 UnqualifiedId &Member, 2049 Decl *ObjCImpDecl, 2050 bool HasTrailingLParen); 2051 2052 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2053 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2054 FunctionDecl *FDecl, 2055 const FunctionProtoType *Proto, 2056 Expr **Args, unsigned NumArgs, 2057 SourceLocation RParenLoc); 2058 2059 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2060 /// This provides the location of the left/right parens and a list of comma 2061 /// locations. 2062 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2063 MultiExprArg Args, SourceLocation RParenLoc, 2064 Expr *ExecConfig = 0); 2065 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2066 SourceLocation LParenLoc, 2067 Expr **Args, unsigned NumArgs, 2068 SourceLocation RParenLoc, 2069 Expr *ExecConfig = 0); 2070 2071 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2072 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2073 2074 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2075 ParsedType Ty, SourceLocation RParenLoc, 2076 Expr *Op); 2077 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2078 TypeSourceInfo *Ty, 2079 SourceLocation RParenLoc, 2080 Expr *Op); 2081 2082 bool TypeIsVectorType(ParsedType Ty) { 2083 return GetTypeFromParser(Ty)->isVectorType(); 2084 } 2085 2086 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2087 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2088 SourceLocation RParenLoc, Expr *E, 2089 TypeSourceInfo *TInfo); 2090 2091 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2092 ParsedType Ty, 2093 SourceLocation RParenLoc, 2094 Expr *Op); 2095 2096 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2097 TypeSourceInfo *TInfo, 2098 SourceLocation RParenLoc, 2099 Expr *InitExpr); 2100 2101 ExprResult ActOnInitList(SourceLocation LParenLoc, 2102 MultiExprArg InitList, 2103 SourceLocation RParenLoc); 2104 2105 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2106 SourceLocation Loc, 2107 bool GNUSyntax, 2108 ExprResult Init); 2109 2110 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2111 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2112 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2113 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2114 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2115 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2116 2117 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2118 /// in the case of a the GNU conditional expr extension. 2119 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2120 SourceLocation ColonLoc, 2121 Expr *Cond, Expr *LHS, Expr *RHS); 2122 2123 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2124 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2125 LabelDecl *LD); 2126 2127 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2128 SourceLocation RPLoc); // "({..})" 2129 2130 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2131 struct OffsetOfComponent { 2132 SourceLocation LocStart, LocEnd; 2133 bool isBrackets; // true if [expr], false if .ident 2134 union { 2135 IdentifierInfo *IdentInfo; 2136 ExprTy *E; 2137 } U; 2138 }; 2139 2140 /// __builtin_offsetof(type, a.b[123][456].c) 2141 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2142 TypeSourceInfo *TInfo, 2143 OffsetOfComponent *CompPtr, 2144 unsigned NumComponents, 2145 SourceLocation RParenLoc); 2146 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2147 SourceLocation BuiltinLoc, 2148 SourceLocation TypeLoc, 2149 ParsedType Arg1, 2150 OffsetOfComponent *CompPtr, 2151 unsigned NumComponents, 2152 SourceLocation RParenLoc); 2153 2154 // __builtin_choose_expr(constExpr, expr1, expr2) 2155 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2156 Expr *cond, Expr *expr1, 2157 Expr *expr2, SourceLocation RPLoc); 2158 2159 // __builtin_va_arg(expr, type) 2160 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2161 Expr *expr, ParsedType type, 2162 SourceLocation RPLoc); 2163 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2164 Expr *expr, TypeSourceInfo *TInfo, 2165 SourceLocation RPLoc); 2166 2167 // __null 2168 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2169 2170 //===------------------------- "Block" Extension ------------------------===// 2171 2172 /// ActOnBlockStart - This callback is invoked when a block literal is 2173 /// started. 2174 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2175 2176 /// ActOnBlockArguments - This callback allows processing of block arguments. 2177 /// If there are no arguments, this is still invoked. 2178 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2179 2180 /// ActOnBlockError - If there is an error parsing a block, this callback 2181 /// is invoked to pop the information about the block from the action impl. 2182 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2183 2184 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2185 /// literal was successfully completed. ^(int x){...} 2186 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2187 Stmt *Body, Scope *CurScope); 2188 2189 //===---------------------------- C++ Features --------------------------===// 2190 2191 // Act on C++ namespaces 2192 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2193 SourceLocation IdentLoc, 2194 IdentifierInfo *Ident, 2195 SourceLocation LBrace, 2196 AttributeList *AttrList); 2197 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2198 2199 NamespaceDecl *getStdNamespace() const; 2200 NamespaceDecl *getOrCreateStdNamespace(); 2201 2202 CXXRecordDecl *getStdBadAlloc() const; 2203 2204 Decl *ActOnUsingDirective(Scope *CurScope, 2205 SourceLocation UsingLoc, 2206 SourceLocation NamespcLoc, 2207 CXXScopeSpec &SS, 2208 SourceLocation IdentLoc, 2209 IdentifierInfo *NamespcName, 2210 AttributeList *AttrList); 2211 2212 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2213 2214 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2215 SourceLocation NamespaceLoc, 2216 SourceLocation AliasLoc, 2217 IdentifierInfo *Alias, 2218 CXXScopeSpec &SS, 2219 SourceLocation IdentLoc, 2220 IdentifierInfo *Ident); 2221 2222 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2223 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2224 const LookupResult &PreviousDecls); 2225 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2226 NamedDecl *Target); 2227 2228 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2229 bool isTypeName, 2230 const CXXScopeSpec &SS, 2231 SourceLocation NameLoc, 2232 const LookupResult &Previous); 2233 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2234 const CXXScopeSpec &SS, 2235 SourceLocation NameLoc); 2236 2237 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2238 SourceLocation UsingLoc, 2239 CXXScopeSpec &SS, 2240 const DeclarationNameInfo &NameInfo, 2241 AttributeList *AttrList, 2242 bool IsInstantiation, 2243 bool IsTypeName, 2244 SourceLocation TypenameLoc); 2245 2246 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2247 2248 Decl *ActOnUsingDeclaration(Scope *CurScope, 2249 AccessSpecifier AS, 2250 bool HasUsingKeyword, 2251 SourceLocation UsingLoc, 2252 CXXScopeSpec &SS, 2253 UnqualifiedId &Name, 2254 AttributeList *AttrList, 2255 bool IsTypeName, 2256 SourceLocation TypenameLoc); 2257 2258 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2259 /// ActOnDeclarator, when a C++ direct initializer is present. 2260 /// e.g: "int x(1);" 2261 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2262 SourceLocation LParenLoc, 2263 MultiExprArg Exprs, 2264 SourceLocation RParenLoc, 2265 bool TypeMayContainAuto); 2266 2267 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2268 /// and sets it as the initializer for the the passed in VarDecl. 2269 bool InitializeVarWithConstructor(VarDecl *VD, 2270 CXXConstructorDecl *Constructor, 2271 MultiExprArg Exprs); 2272 2273 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2274 /// including handling of its default argument expressions. 2275 /// 2276 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2277 ExprResult 2278 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2279 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2280 bool RequiresZeroInit, unsigned ConstructKind, 2281 SourceRange ParenRange); 2282 2283 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2284 // the constructor can be elidable? 2285 ExprResult 2286 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2287 CXXConstructorDecl *Constructor, bool Elidable, 2288 MultiExprArg Exprs, bool RequiresZeroInit, 2289 unsigned ConstructKind, 2290 SourceRange ParenRange); 2291 2292 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2293 /// the default expr if needed. 2294 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2295 FunctionDecl *FD, 2296 ParmVarDecl *Param); 2297 2298 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2299 /// constructed variable. 2300 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2301 2302 /// \brief Declare the implicit default constructor for the given class. 2303 /// 2304 /// \param ClassDecl The class declaration into which the implicit 2305 /// default constructor will be added. 2306 /// 2307 /// \returns The implicitly-declared default constructor. 2308 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2309 CXXRecordDecl *ClassDecl); 2310 2311 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2312 /// defining this constructor as the default constructor. 2313 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2314 CXXConstructorDecl *Constructor); 2315 2316 /// \brief Declare the implicit destructor for the given class. 2317 /// 2318 /// \param ClassDecl The class declaration into which the implicit 2319 /// destructor will be added. 2320 /// 2321 /// \returns The implicitly-declared destructor. 2322 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2323 2324 /// DefineImplicitDestructor - Checks for feasibility of 2325 /// defining this destructor as the default destructor. 2326 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2327 CXXDestructorDecl *Destructor); 2328 2329 /// \brief Declare all inherited constructors for the given class. 2330 /// 2331 /// \param ClassDecl The class declaration into which the inherited 2332 /// constructors will be added. 2333 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2334 2335 /// \brief Declare the implicit copy constructor for the given class. 2336 /// 2337 /// \param S The scope of the class, which may be NULL if this is a 2338 /// template instantiation. 2339 /// 2340 /// \param ClassDecl The class declaration into which the implicit 2341 /// copy constructor will be added. 2342 /// 2343 /// \returns The implicitly-declared copy constructor. 2344 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2345 2346 /// DefineImplicitCopyConstructor - Checks for feasibility of 2347 /// defining this constructor as the copy constructor. 2348 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2349 CXXConstructorDecl *Constructor, 2350 unsigned TypeQuals); 2351 2352 /// \brief Declare the implicit copy assignment operator for the given class. 2353 /// 2354 /// \param S The scope of the class, which may be NULL if this is a 2355 /// template instantiation. 2356 /// 2357 /// \param ClassDecl The class declaration into which the implicit 2358 /// copy-assignment operator will be added. 2359 /// 2360 /// \returns The implicitly-declared copy assignment operator. 2361 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2362 2363 /// \brief Defined an implicitly-declared copy assignment operator. 2364 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2365 CXXMethodDecl *MethodDecl); 2366 2367 /// \brief Force the declaration of any implicitly-declared members of this 2368 /// class. 2369 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2370 2371 /// MaybeBindToTemporary - If the passed in expression has a record type with 2372 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2373 /// it simply returns the passed in expression. 2374 ExprResult MaybeBindToTemporary(Expr *E); 2375 2376 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2377 MultiExprArg ArgsPtr, 2378 SourceLocation Loc, 2379 ASTOwningVector<Expr*> &ConvertedArgs); 2380 2381 ParsedType getDestructorName(SourceLocation TildeLoc, 2382 IdentifierInfo &II, SourceLocation NameLoc, 2383 Scope *S, CXXScopeSpec &SS, 2384 ParsedType ObjectType, 2385 bool EnteringContext); 2386 2387 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2388 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2389 tok::TokenKind Kind, 2390 SourceLocation LAngleBracketLoc, 2391 ParsedType Ty, 2392 SourceLocation RAngleBracketLoc, 2393 SourceLocation LParenLoc, 2394 Expr *E, 2395 SourceLocation RParenLoc); 2396 2397 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2398 tok::TokenKind Kind, 2399 TypeSourceInfo *Ty, 2400 Expr *E, 2401 SourceRange AngleBrackets, 2402 SourceRange Parens); 2403 2404 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2405 SourceLocation TypeidLoc, 2406 TypeSourceInfo *Operand, 2407 SourceLocation RParenLoc); 2408 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2409 SourceLocation TypeidLoc, 2410 Expr *Operand, 2411 SourceLocation RParenLoc); 2412 2413 /// ActOnCXXTypeid - Parse typeid( something ). 2414 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2415 SourceLocation LParenLoc, bool isType, 2416 void *TyOrExpr, 2417 SourceLocation RParenLoc); 2418 2419 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2420 SourceLocation TypeidLoc, 2421 TypeSourceInfo *Operand, 2422 SourceLocation RParenLoc); 2423 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2424 SourceLocation TypeidLoc, 2425 Expr *Operand, 2426 SourceLocation RParenLoc); 2427 2428 /// ActOnCXXUuidof - Parse __uuidof( something ). 2429 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2430 SourceLocation LParenLoc, bool isType, 2431 void *TyOrExpr, 2432 SourceLocation RParenLoc); 2433 2434 2435 //// ActOnCXXThis - Parse 'this' pointer. 2436 ExprResult ActOnCXXThis(SourceLocation loc); 2437 2438 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2439 /// pointer to an instance method whose 'this' pointer is 2440 /// capturable, or null if this is not possible. 2441 CXXMethodDecl *tryCaptureCXXThis(); 2442 2443 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2444 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2445 2446 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2447 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2448 2449 //// ActOnCXXThrow - Parse throw expressions. 2450 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2451 bool CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *&E); 2452 2453 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2454 /// Can be interpreted either as function-style casting ("int(x)") 2455 /// or class type construction ("ClassType(x,y,z)") 2456 /// or creation of a value-initialized type ("int()"). 2457 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2458 SourceLocation LParenLoc, 2459 MultiExprArg Exprs, 2460 SourceLocation RParenLoc); 2461 2462 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2463 SourceLocation LParenLoc, 2464 MultiExprArg Exprs, 2465 SourceLocation RParenLoc); 2466 2467 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2468 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2469 SourceLocation PlacementLParen, 2470 MultiExprArg PlacementArgs, 2471 SourceLocation PlacementRParen, 2472 SourceRange TypeIdParens, Declarator &D, 2473 SourceLocation ConstructorLParen, 2474 MultiExprArg ConstructorArgs, 2475 SourceLocation ConstructorRParen); 2476 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2477 SourceLocation PlacementLParen, 2478 MultiExprArg PlacementArgs, 2479 SourceLocation PlacementRParen, 2480 SourceRange TypeIdParens, 2481 QualType AllocType, 2482 TypeSourceInfo *AllocTypeInfo, 2483 Expr *ArraySize, 2484 SourceLocation ConstructorLParen, 2485 MultiExprArg ConstructorArgs, 2486 SourceLocation ConstructorRParen, 2487 bool TypeMayContainAuto = true); 2488 2489 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2490 SourceRange R); 2491 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2492 bool UseGlobal, QualType AllocType, bool IsArray, 2493 Expr **PlaceArgs, unsigned NumPlaceArgs, 2494 FunctionDecl *&OperatorNew, 2495 FunctionDecl *&OperatorDelete); 2496 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2497 DeclarationName Name, Expr** Args, 2498 unsigned NumArgs, DeclContext *Ctx, 2499 bool AllowMissing, FunctionDecl *&Operator); 2500 void DeclareGlobalNewDelete(); 2501 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2502 QualType Argument, 2503 bool addMallocAttr = false); 2504 2505 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2506 DeclarationName Name, FunctionDecl* &Operator); 2507 2508 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2509 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2510 bool UseGlobal, bool ArrayForm, 2511 Expr *Operand); 2512 2513 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2514 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2515 SourceLocation StmtLoc, 2516 bool ConvertToBoolean); 2517 2518 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2519 Expr *Operand, SourceLocation RParen); 2520 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2521 SourceLocation RParen); 2522 2523 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2524 /// pseudo-functions. 2525 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2526 SourceLocation KWLoc, 2527 ParsedType Ty, 2528 SourceLocation RParen); 2529 2530 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2531 SourceLocation KWLoc, 2532 TypeSourceInfo *T, 2533 SourceLocation RParen); 2534 2535 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2536 /// pseudo-functions. 2537 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2538 SourceLocation KWLoc, 2539 ParsedType LhsTy, 2540 ParsedType RhsTy, 2541 SourceLocation RParen); 2542 2543 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2544 SourceLocation KWLoc, 2545 TypeSourceInfo *LhsT, 2546 TypeSourceInfo *RhsT, 2547 SourceLocation RParen); 2548 2549 ExprResult ActOnStartCXXMemberReference(Scope *S, 2550 Expr *Base, 2551 SourceLocation OpLoc, 2552 tok::TokenKind OpKind, 2553 ParsedType &ObjectType, 2554 bool &MayBePseudoDestructor); 2555 2556 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2557 2558 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2559 SourceLocation OpLoc, 2560 tok::TokenKind OpKind, 2561 const CXXScopeSpec &SS, 2562 TypeSourceInfo *ScopeType, 2563 SourceLocation CCLoc, 2564 SourceLocation TildeLoc, 2565 PseudoDestructorTypeStorage DestroyedType, 2566 bool HasTrailingLParen); 2567 2568 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2569 SourceLocation OpLoc, 2570 tok::TokenKind OpKind, 2571 CXXScopeSpec &SS, 2572 UnqualifiedId &FirstTypeName, 2573 SourceLocation CCLoc, 2574 SourceLocation TildeLoc, 2575 UnqualifiedId &SecondTypeName, 2576 bool HasTrailingLParen); 2577 2578 /// MaybeCreateExprWithCleanups - If the current full-expression 2579 /// requires any cleanups, surround it with a ExprWithCleanups node. 2580 /// Otherwise, just returns the passed-in expression. 2581 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2582 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2583 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2584 2585 ExprResult ActOnFinishFullExpr(Expr *Expr); 2586 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2587 2588 // Marks SS invalid if it represents an incomplete type. 2589 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2590 2591 DeclContext *computeDeclContext(QualType T); 2592 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2593 bool EnteringContext = false); 2594 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2595 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2596 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2597 2598 /// \brief The parser has parsed a global nested-name-specifier '::'. 2599 /// 2600 /// \param S The scope in which this nested-name-specifier occurs. 2601 /// 2602 /// \param CCLoc The location of the '::'. 2603 /// 2604 /// \param SS The nested-name-specifier, which will be updated in-place 2605 /// to reflect the parsed nested-name-specifier. 2606 /// 2607 /// \returns true if an error occurred, false otherwise. 2608 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2609 CXXScopeSpec &SS); 2610 2611 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2612 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2613 2614 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2615 SourceLocation IdLoc, 2616 IdentifierInfo &II, 2617 ParsedType ObjectType); 2618 2619 bool BuildCXXNestedNameSpecifier(Scope *S, 2620 IdentifierInfo &Identifier, 2621 SourceLocation IdentifierLoc, 2622 SourceLocation CCLoc, 2623 QualType ObjectType, 2624 bool EnteringContext, 2625 CXXScopeSpec &SS, 2626 NamedDecl *ScopeLookupResult, 2627 bool ErrorRecoveryLookup); 2628 2629 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2630 /// 2631 /// \param S The scope in which this nested-name-specifier occurs. 2632 /// 2633 /// \param Identifier The identifier preceding the '::'. 2634 /// 2635 /// \param IdentifierLoc The location of the identifier. 2636 /// 2637 /// \param CCLoc The location of the '::'. 2638 /// 2639 /// \param ObjectType The type of the object, if we're parsing 2640 /// nested-name-specifier in a member access expression. 2641 /// 2642 /// \param EnteringContext Whether we're entering the context nominated by 2643 /// this nested-name-specifier. 2644 /// 2645 /// \param SS The nested-name-specifier, which is both an input 2646 /// parameter (the nested-name-specifier before this type) and an 2647 /// output parameter (containing the full nested-name-specifier, 2648 /// including this new type). 2649 /// 2650 /// \returns true if an error occurred, false otherwise. 2651 bool ActOnCXXNestedNameSpecifier(Scope *S, 2652 IdentifierInfo &Identifier, 2653 SourceLocation IdentifierLoc, 2654 SourceLocation CCLoc, 2655 ParsedType ObjectType, 2656 bool EnteringContext, 2657 CXXScopeSpec &SS); 2658 2659 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2660 IdentifierInfo &Identifier, 2661 SourceLocation IdentifierLoc, 2662 SourceLocation ColonLoc, 2663 ParsedType ObjectType, 2664 bool EnteringContext); 2665 2666 /// \brief The parser has parsed a nested-name-specifier 2667 /// 'template[opt] template-name < template-args >::'. 2668 /// 2669 /// \param S The scope in which this nested-name-specifier occurs. 2670 /// 2671 /// \param TemplateLoc The location of the 'template' keyword, if any. 2672 /// 2673 /// \param SS The nested-name-specifier, which is both an input 2674 /// parameter (the nested-name-specifier before this type) and an 2675 /// output parameter (containing the full nested-name-specifier, 2676 /// including this new type). 2677 /// 2678 /// \param TemplateLoc the location of the 'template' keyword, if any. 2679 /// \param TemplateName The template name. 2680 /// \param TemplateNameLoc The location of the template name. 2681 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2682 /// \param TemplateArgs The template arguments. 2683 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2684 /// \param CCLoc The location of the '::'. 2685 2686 /// \param EnteringContext Whether we're entering the context of the 2687 /// nested-name-specifier. 2688 /// 2689 /// 2690 /// \returns true if an error occurred, false otherwise. 2691 bool ActOnCXXNestedNameSpecifier(Scope *S, 2692 SourceLocation TemplateLoc, 2693 CXXScopeSpec &SS, 2694 TemplateTy Template, 2695 SourceLocation TemplateNameLoc, 2696 SourceLocation LAngleLoc, 2697 ASTTemplateArgsPtr TemplateArgs, 2698 SourceLocation RAngleLoc, 2699 SourceLocation CCLoc, 2700 bool EnteringContext); 2701 2702 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2703 /// that the parser can use later to reconstruct the given 2704 /// nested-name-specifier. 2705 /// 2706 /// \param SS A nested-name-specifier. 2707 /// 2708 /// \returns A pointer containing all of the information in the 2709 /// nested-name-specifier \p SS. 2710 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2711 2712 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2713 /// the nested-name-specifier structure. 2714 /// 2715 /// \param Annotation The annotation pointer, produced by 2716 /// \c SaveNestedNameSpecifierAnnotation(). 2717 /// 2718 /// \param AnnotationRange The source range corresponding to the annotation. 2719 /// 2720 /// \param SS The nested-name-specifier that will be updated with the contents 2721 /// of the annotation pointer. 2722 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2723 SourceRange AnnotationRange, 2724 CXXScopeSpec &SS); 2725 2726 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2727 2728 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2729 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2730 /// After this method is called, according to [C++ 3.4.3p3], names should be 2731 /// looked up in the declarator-id's scope, until the declarator is parsed and 2732 /// ActOnCXXExitDeclaratorScope is called. 2733 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2734 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2735 2736 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2737 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2738 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2739 /// Used to indicate that names should revert to being looked up in the 2740 /// defining scope. 2741 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2742 2743 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2744 /// initializer for the declaration 'Dcl'. 2745 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2746 /// static data member of class X, names should be looked up in the scope of 2747 /// class X. 2748 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2749 2750 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2751 /// initializer for the declaration 'Dcl'. 2752 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2753 2754 // ParseObjCStringLiteral - Parse Objective-C string literals. 2755 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2756 Expr **Strings, 2757 unsigned NumStrings); 2758 2759 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2760 TypeSourceInfo *EncodedTypeInfo, 2761 SourceLocation RParenLoc); 2762 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2763 CXXMethodDecl *Method); 2764 2765 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2766 SourceLocation EncodeLoc, 2767 SourceLocation LParenLoc, 2768 ParsedType Ty, 2769 SourceLocation RParenLoc); 2770 2771 // ParseObjCSelectorExpression - Build selector expression for @selector 2772 ExprResult ParseObjCSelectorExpression(Selector Sel, 2773 SourceLocation AtLoc, 2774 SourceLocation SelLoc, 2775 SourceLocation LParenLoc, 2776 SourceLocation RParenLoc); 2777 2778 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2779 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2780 SourceLocation AtLoc, 2781 SourceLocation ProtoLoc, 2782 SourceLocation LParenLoc, 2783 SourceLocation RParenLoc); 2784 2785 //===--------------------------------------------------------------------===// 2786 // C++ Declarations 2787 // 2788 Decl *ActOnStartLinkageSpecification(Scope *S, 2789 SourceLocation ExternLoc, 2790 SourceLocation LangLoc, 2791 llvm::StringRef Lang, 2792 SourceLocation LBraceLoc); 2793 Decl *ActOnFinishLinkageSpecification(Scope *S, 2794 Decl *LinkageSpec, 2795 SourceLocation RBraceLoc); 2796 2797 2798 //===--------------------------------------------------------------------===// 2799 // C++ Classes 2800 // 2801 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2802 const CXXScopeSpec *SS = 0); 2803 2804 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2805 SourceLocation ASLoc, 2806 SourceLocation ColonLoc); 2807 2808 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2809 Declarator &D, 2810 MultiTemplateParamsArg TemplateParameterLists, 2811 Expr *BitfieldWidth, const VirtSpecifiers &VS, 2812 Expr *Init, bool IsDefinition, 2813 bool Deleted = false); 2814 2815 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2816 Scope *S, 2817 CXXScopeSpec &SS, 2818 IdentifierInfo *MemberOrBase, 2819 ParsedType TemplateTypeTy, 2820 SourceLocation IdLoc, 2821 SourceLocation LParenLoc, 2822 Expr **Args, unsigned NumArgs, 2823 SourceLocation RParenLoc, 2824 SourceLocation EllipsisLoc); 2825 2826 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2827 unsigned NumArgs, SourceLocation IdLoc, 2828 SourceLocation LParenLoc, 2829 SourceLocation RParenLoc); 2830 2831 MemInitResult BuildBaseInitializer(QualType BaseType, 2832 TypeSourceInfo *BaseTInfo, 2833 Expr **Args, unsigned NumArgs, 2834 SourceLocation LParenLoc, 2835 SourceLocation RParenLoc, 2836 CXXRecordDecl *ClassDecl, 2837 SourceLocation EllipsisLoc); 2838 2839 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 2840 Expr **Args, unsigned NumArgs, 2841 SourceLocation BaseLoc, 2842 SourceLocation RParenLoc, 2843 SourceLocation LParenLoc, 2844 CXXRecordDecl *ClassDecl); 2845 2846 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 2847 CXXCtorInitializer **Initializers, 2848 unsigned NumInitializers, bool AnyErrors); 2849 2850 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2851 2852 2853 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2854 /// mark all the non-trivial destructors of its members and bases as 2855 /// referenced. 2856 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2857 CXXRecordDecl *Record); 2858 2859 /// \brief The list of classes whose vtables have been used within 2860 /// this translation unit, and the source locations at which the 2861 /// first use occurred. 2862 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2863 2864 /// \brief The list of vtables that are required but have not yet been 2865 /// materialized. 2866 llvm::SmallVector<VTableUse, 16> VTableUses; 2867 2868 /// \brief The set of classes whose vtables have been used within 2869 /// this translation unit, and a bit that will be true if the vtable is 2870 /// required to be emitted (otherwise, it should be emitted only if needed 2871 /// by code generation). 2872 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2873 2874 /// \brief A list of all of the dynamic classes in this translation 2875 /// unit. 2876 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2877 2878 /// \brief Note that the vtable for the given class was used at the 2879 /// given location. 2880 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2881 bool DefinitionRequired = false); 2882 2883 /// MarkVirtualMembersReferenced - Will mark all members of the given 2884 /// CXXRecordDecl referenced. 2885 void MarkVirtualMembersReferenced(SourceLocation Loc, 2886 const CXXRecordDecl *RD); 2887 2888 /// \brief Define all of the vtables that have been used in this 2889 /// translation unit and reference any virtual members used by those 2890 /// vtables. 2891 /// 2892 /// \returns true if any work was done, false otherwise. 2893 bool DefineUsedVTables(); 2894 2895 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2896 2897 void ActOnMemInitializers(Decl *ConstructorDecl, 2898 SourceLocation ColonLoc, 2899 MemInitTy **MemInits, unsigned NumMemInits, 2900 bool AnyErrors); 2901 2902 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2903 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2904 Decl *TagDecl, 2905 SourceLocation LBrac, 2906 SourceLocation RBrac, 2907 AttributeList *AttrList); 2908 2909 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2910 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2911 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2912 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2913 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2914 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2915 2916 Decl *ActOnStaticAssertDeclaration(SourceLocation AssertLoc, 2917 Expr *AssertExpr, 2918 Expr *AssertMessageExpr); 2919 2920 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2921 TypeSourceInfo *TSInfo); 2922 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2923 MultiTemplateParamsArg TemplateParams); 2924 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2925 MultiTemplateParamsArg TemplateParams); 2926 2927 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2928 StorageClass& SC); 2929 void CheckConstructor(CXXConstructorDecl *Constructor); 2930 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2931 StorageClass& SC); 2932 bool CheckDestructor(CXXDestructorDecl *Destructor); 2933 void CheckConversionDeclarator(Declarator &D, QualType &R, 2934 StorageClass& SC); 2935 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2936 2937 //===--------------------------------------------------------------------===// 2938 // C++ Derived Classes 2939 // 2940 2941 /// ActOnBaseSpecifier - Parsed a base specifier 2942 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2943 SourceRange SpecifierRange, 2944 bool Virtual, AccessSpecifier Access, 2945 TypeSourceInfo *TInfo, 2946 SourceLocation EllipsisLoc); 2947 2948 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2949 SourceRange SpecifierRange, 2950 bool Virtual, AccessSpecifier Access, 2951 ParsedType basetype, 2952 SourceLocation BaseLoc, 2953 SourceLocation EllipsisLoc); 2954 2955 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2956 unsigned NumBases); 2957 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 2958 2959 bool IsDerivedFrom(QualType Derived, QualType Base); 2960 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 2961 2962 // FIXME: I don't like this name. 2963 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 2964 2965 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 2966 2967 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2968 SourceLocation Loc, SourceRange Range, 2969 CXXCastPath *BasePath = 0, 2970 bool IgnoreAccess = false); 2971 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 2972 unsigned InaccessibleBaseID, 2973 unsigned AmbigiousBaseConvID, 2974 SourceLocation Loc, SourceRange Range, 2975 DeclarationName Name, 2976 CXXCastPath *BasePath); 2977 2978 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 2979 2980 /// CheckOverridingFunctionReturnType - Checks whether the return types are 2981 /// covariant, according to C++ [class.virtual]p5. 2982 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 2983 const CXXMethodDecl *Old); 2984 2985 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 2986 /// spec is a subset of base spec. 2987 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 2988 const CXXMethodDecl *Old); 2989 2990 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 2991 2992 /// CheckOverrideControl - Check C++0x override control semantics. 2993 void CheckOverrideControl(const Decl *D); 2994 2995 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 2996 /// overrides a virtual member function marked 'final', according to 2997 /// C++0x [class.virtual]p3. 2998 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 2999 const CXXMethodDecl *Old); 3000 3001 3002 //===--------------------------------------------------------------------===// 3003 // C++ Access Control 3004 // 3005 3006 enum AccessResult { 3007 AR_accessible, 3008 AR_inaccessible, 3009 AR_dependent, 3010 AR_delayed 3011 }; 3012 3013 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3014 NamedDecl *PrevMemberDecl, 3015 AccessSpecifier LexicalAS); 3016 3017 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3018 DeclAccessPair FoundDecl); 3019 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3020 DeclAccessPair FoundDecl); 3021 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3022 SourceRange PlacementRange, 3023 CXXRecordDecl *NamingClass, 3024 DeclAccessPair FoundDecl); 3025 AccessResult CheckConstructorAccess(SourceLocation Loc, 3026 CXXConstructorDecl *D, 3027 const InitializedEntity &Entity, 3028 AccessSpecifier Access, 3029 bool IsCopyBindingRefToTemp = false); 3030 AccessResult CheckDestructorAccess(SourceLocation Loc, 3031 CXXDestructorDecl *Dtor, 3032 const PartialDiagnostic &PDiag); 3033 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3034 NamedDecl *D, 3035 const PartialDiagnostic &PDiag); 3036 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3037 Expr *ObjectExpr, 3038 Expr *ArgExpr, 3039 DeclAccessPair FoundDecl); 3040 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3041 DeclAccessPair FoundDecl); 3042 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3043 QualType Base, QualType Derived, 3044 const CXXBasePath &Path, 3045 unsigned DiagID, 3046 bool ForceCheck = false, 3047 bool ForceUnprivileged = false); 3048 void CheckLookupAccess(const LookupResult &R); 3049 3050 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3051 const MultiLevelTemplateArgumentList &TemplateArgs); 3052 void PerformDependentDiagnostics(const DeclContext *Pattern, 3053 const MultiLevelTemplateArgumentList &TemplateArgs); 3054 3055 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3056 3057 /// A flag to suppress access checking. 3058 bool SuppressAccessChecking; 3059 3060 /// \brief When true, access checking violations are treated as SFINAE 3061 /// failures rather than hard errors. 3062 bool AccessCheckingSFINAE; 3063 3064 void ActOnStartSuppressingAccessChecks(); 3065 void ActOnStopSuppressingAccessChecks(); 3066 3067 enum AbstractDiagSelID { 3068 AbstractNone = -1, 3069 AbstractReturnType, 3070 AbstractParamType, 3071 AbstractVariableType, 3072 AbstractFieldType, 3073 AbstractArrayType 3074 }; 3075 3076 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3077 const PartialDiagnostic &PD); 3078 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3079 3080 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3081 AbstractDiagSelID SelID = AbstractNone); 3082 3083 //===--------------------------------------------------------------------===// 3084 // C++ Overloaded Operators [C++ 13.5] 3085 // 3086 3087 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3088 3089 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3090 3091 //===--------------------------------------------------------------------===// 3092 // C++ Templates [C++ 14] 3093 // 3094 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3095 QualType ObjectType, bool EnteringContext, 3096 bool &MemberOfUnknownSpecialization); 3097 3098 TemplateNameKind isTemplateName(Scope *S, 3099 CXXScopeSpec &SS, 3100 bool hasTemplateKeyword, 3101 UnqualifiedId &Name, 3102 ParsedType ObjectType, 3103 bool EnteringContext, 3104 TemplateTy &Template, 3105 bool &MemberOfUnknownSpecialization); 3106 3107 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3108 SourceLocation IILoc, 3109 Scope *S, 3110 const CXXScopeSpec *SS, 3111 TemplateTy &SuggestedTemplate, 3112 TemplateNameKind &SuggestedKind); 3113 3114 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3115 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3116 3117 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3118 SourceLocation EllipsisLoc, 3119 SourceLocation KeyLoc, 3120 IdentifierInfo *ParamName, 3121 SourceLocation ParamNameLoc, 3122 unsigned Depth, unsigned Position, 3123 SourceLocation EqualLoc, 3124 ParsedType DefaultArg); 3125 3126 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3127 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3128 unsigned Depth, 3129 unsigned Position, 3130 SourceLocation EqualLoc, 3131 Expr *DefaultArg); 3132 Decl *ActOnTemplateTemplateParameter(Scope *S, 3133 SourceLocation TmpLoc, 3134 TemplateParamsTy *Params, 3135 SourceLocation EllipsisLoc, 3136 IdentifierInfo *ParamName, 3137 SourceLocation ParamNameLoc, 3138 unsigned Depth, 3139 unsigned Position, 3140 SourceLocation EqualLoc, 3141 ParsedTemplateArgument DefaultArg); 3142 3143 TemplateParamsTy * 3144 ActOnTemplateParameterList(unsigned Depth, 3145 SourceLocation ExportLoc, 3146 SourceLocation TemplateLoc, 3147 SourceLocation LAngleLoc, 3148 Decl **Params, unsigned NumParams, 3149 SourceLocation RAngleLoc); 3150 3151 /// \brief The context in which we are checking a template parameter 3152 /// list. 3153 enum TemplateParamListContext { 3154 TPC_ClassTemplate, 3155 TPC_FunctionTemplate, 3156 TPC_ClassTemplateMember, 3157 TPC_FriendFunctionTemplate, 3158 TPC_FriendFunctionTemplateDefinition 3159 }; 3160 3161 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3162 TemplateParameterList *OldParams, 3163 TemplateParamListContext TPC); 3164 TemplateParameterList * 3165 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3166 const CXXScopeSpec &SS, 3167 TemplateParameterList **ParamLists, 3168 unsigned NumParamLists, 3169 bool IsFriend, 3170 bool &IsExplicitSpecialization, 3171 bool &Invalid); 3172 3173 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3174 SourceLocation KWLoc, CXXScopeSpec &SS, 3175 IdentifierInfo *Name, SourceLocation NameLoc, 3176 AttributeList *Attr, 3177 TemplateParameterList *TemplateParams, 3178 AccessSpecifier AS); 3179 3180 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3181 TemplateArgumentListInfo &Out); 3182 3183 QualType CheckTemplateIdType(TemplateName Template, 3184 SourceLocation TemplateLoc, 3185 TemplateArgumentListInfo &TemplateArgs); 3186 3187 TypeResult 3188 ActOnTemplateIdType(CXXScopeSpec &SS, 3189 TemplateTy Template, SourceLocation TemplateLoc, 3190 SourceLocation LAngleLoc, 3191 ASTTemplateArgsPtr TemplateArgs, 3192 SourceLocation RAngleLoc); 3193 3194 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3195 /// such as \c class T::template apply<U>. 3196 /// 3197 /// \param TUK 3198 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3199 TypeSpecifierType TagSpec, 3200 SourceLocation TagLoc, 3201 CXXScopeSpec &SS, 3202 TemplateTy TemplateD, 3203 SourceLocation TemplateLoc, 3204 SourceLocation LAngleLoc, 3205 ASTTemplateArgsPtr TemplateArgsIn, 3206 SourceLocation RAngleLoc); 3207 3208 3209 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3210 LookupResult &R, 3211 bool RequiresADL, 3212 const TemplateArgumentListInfo &TemplateArgs); 3213 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3214 const DeclarationNameInfo &NameInfo, 3215 const TemplateArgumentListInfo &TemplateArgs); 3216 3217 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3218 SourceLocation TemplateKWLoc, 3219 CXXScopeSpec &SS, 3220 UnqualifiedId &Name, 3221 ParsedType ObjectType, 3222 bool EnteringContext, 3223 TemplateTy &Template); 3224 3225 DeclResult 3226 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3227 SourceLocation KWLoc, 3228 CXXScopeSpec &SS, 3229 TemplateTy Template, 3230 SourceLocation TemplateNameLoc, 3231 SourceLocation LAngleLoc, 3232 ASTTemplateArgsPtr TemplateArgs, 3233 SourceLocation RAngleLoc, 3234 AttributeList *Attr, 3235 MultiTemplateParamsArg TemplateParameterLists); 3236 3237 Decl *ActOnTemplateDeclarator(Scope *S, 3238 MultiTemplateParamsArg TemplateParameterLists, 3239 Declarator &D); 3240 3241 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3242 MultiTemplateParamsArg TemplateParameterLists, 3243 Declarator &D); 3244 3245 bool 3246 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3247 TemplateSpecializationKind NewTSK, 3248 NamedDecl *PrevDecl, 3249 TemplateSpecializationKind PrevTSK, 3250 SourceLocation PrevPtOfInstantiation, 3251 bool &SuppressNew); 3252 3253 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3254 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3255 LookupResult &Previous); 3256 3257 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3258 TemplateArgumentListInfo *ExplicitTemplateArgs, 3259 LookupResult &Previous); 3260 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3261 3262 DeclResult 3263 ActOnExplicitInstantiation(Scope *S, 3264 SourceLocation ExternLoc, 3265 SourceLocation TemplateLoc, 3266 unsigned TagSpec, 3267 SourceLocation KWLoc, 3268 const CXXScopeSpec &SS, 3269 TemplateTy Template, 3270 SourceLocation TemplateNameLoc, 3271 SourceLocation LAngleLoc, 3272 ASTTemplateArgsPtr TemplateArgs, 3273 SourceLocation RAngleLoc, 3274 AttributeList *Attr); 3275 3276 DeclResult 3277 ActOnExplicitInstantiation(Scope *S, 3278 SourceLocation ExternLoc, 3279 SourceLocation TemplateLoc, 3280 unsigned TagSpec, 3281 SourceLocation KWLoc, 3282 CXXScopeSpec &SS, 3283 IdentifierInfo *Name, 3284 SourceLocation NameLoc, 3285 AttributeList *Attr); 3286 3287 DeclResult ActOnExplicitInstantiation(Scope *S, 3288 SourceLocation ExternLoc, 3289 SourceLocation TemplateLoc, 3290 Declarator &D); 3291 3292 TemplateArgumentLoc 3293 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3294 SourceLocation TemplateLoc, 3295 SourceLocation RAngleLoc, 3296 Decl *Param, 3297 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3298 3299 /// \brief Specifies the context in which a particular template 3300 /// argument is being checked. 3301 enum CheckTemplateArgumentKind { 3302 /// \brief The template argument was specified in the code or was 3303 /// instantiated with some deduced template arguments. 3304 CTAK_Specified, 3305 3306 /// \brief The template argument was deduced via template argument 3307 /// deduction. 3308 CTAK_Deduced, 3309 3310 /// \brief The template argument was deduced from an array bound 3311 /// via template argument deduction. 3312 CTAK_DeducedFromArrayBound 3313 }; 3314 3315 bool CheckTemplateArgument(NamedDecl *Param, 3316 const TemplateArgumentLoc &Arg, 3317 NamedDecl *Template, 3318 SourceLocation TemplateLoc, 3319 SourceLocation RAngleLoc, 3320 unsigned ArgumentPackIndex, 3321 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3322 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3323 3324 /// \brief Check that the given template arguments can be be provided to 3325 /// the given template, converting the arguments along the way. 3326 /// 3327 /// \param Template The template to which the template arguments are being 3328 /// provided. 3329 /// 3330 /// \param TemplateLoc The location of the template name in the source. 3331 /// 3332 /// \param TemplateArgs The list of template arguments. If the template is 3333 /// a template template parameter, this function may extend the set of 3334 /// template arguments to also include substituted, defaulted template 3335 /// arguments. 3336 /// 3337 /// \param PartialTemplateArgs True if the list of template arguments is 3338 /// intentionally partial, e.g., because we're checking just the initial 3339 /// set of template arguments. 3340 /// 3341 /// \param Converted Will receive the converted, canonicalized template 3342 /// arguments. 3343 /// 3344 /// \returns True if an error occurred, false otherwise. 3345 bool CheckTemplateArgumentList(TemplateDecl *Template, 3346 SourceLocation TemplateLoc, 3347 TemplateArgumentListInfo &TemplateArgs, 3348 bool PartialTemplateArgs, 3349 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3350 3351 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3352 const TemplateArgumentLoc &Arg, 3353 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3354 3355 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3356 TypeSourceInfo *Arg); 3357 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3358 TemplateArgument &Converted); 3359 bool CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3360 QualType InstantiatedParamType, Expr *&Arg, 3361 TemplateArgument &Converted, 3362 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3363 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3364 const TemplateArgumentLoc &Arg); 3365 3366 ExprResult 3367 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3368 QualType ParamType, 3369 SourceLocation Loc); 3370 ExprResult 3371 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3372 SourceLocation Loc); 3373 3374 /// \brief Enumeration describing how template parameter lists are compared 3375 /// for equality. 3376 enum TemplateParameterListEqualKind { 3377 /// \brief We are matching the template parameter lists of two templates 3378 /// that might be redeclarations. 3379 /// 3380 /// \code 3381 /// template<typename T> struct X; 3382 /// template<typename T> struct X; 3383 /// \endcode 3384 TPL_TemplateMatch, 3385 3386 /// \brief We are matching the template parameter lists of two template 3387 /// template parameters as part of matching the template parameter lists 3388 /// of two templates that might be redeclarations. 3389 /// 3390 /// \code 3391 /// template<template<int I> class TT> struct X; 3392 /// template<template<int Value> class Other> struct X; 3393 /// \endcode 3394 TPL_TemplateTemplateParmMatch, 3395 3396 /// \brief We are matching the template parameter lists of a template 3397 /// template argument against the template parameter lists of a template 3398 /// template parameter. 3399 /// 3400 /// \code 3401 /// template<template<int Value> class Metafun> struct X; 3402 /// template<int Value> struct integer_c; 3403 /// X<integer_c> xic; 3404 /// \endcode 3405 TPL_TemplateTemplateArgumentMatch 3406 }; 3407 3408 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3409 TemplateParameterList *Old, 3410 bool Complain, 3411 TemplateParameterListEqualKind Kind, 3412 SourceLocation TemplateArgLoc 3413 = SourceLocation()); 3414 3415 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3416 3417 /// \brief Called when the parser has parsed a C++ typename 3418 /// specifier, e.g., "typename T::type". 3419 /// 3420 /// \param S The scope in which this typename type occurs. 3421 /// \param TypenameLoc the location of the 'typename' keyword 3422 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3423 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3424 /// \param IdLoc the location of the identifier. 3425 TypeResult 3426 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3427 const CXXScopeSpec &SS, const IdentifierInfo &II, 3428 SourceLocation IdLoc); 3429 3430 /// \brief Called when the parser has parsed a C++ typename 3431 /// specifier that ends in a template-id, e.g., 3432 /// "typename MetaFun::template apply<T1, T2>". 3433 /// 3434 /// \param S The scope in which this typename type occurs. 3435 /// \param TypenameLoc the location of the 'typename' keyword 3436 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3437 /// \param TemplateLoc the location of the 'template' keyword, if any. 3438 /// \param TemplateName The template name. 3439 /// \param TemplateNameLoc The location of the template name. 3440 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3441 /// \param TemplateArgs The template arguments. 3442 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3443 TypeResult 3444 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3445 const CXXScopeSpec &SS, 3446 SourceLocation TemplateLoc, 3447 TemplateTy Template, 3448 SourceLocation TemplateNameLoc, 3449 SourceLocation LAngleLoc, 3450 ASTTemplateArgsPtr TemplateArgs, 3451 SourceLocation RAngleLoc); 3452 3453 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3454 SourceLocation KeywordLoc, 3455 NestedNameSpecifierLoc QualifierLoc, 3456 const IdentifierInfo &II, 3457 SourceLocation IILoc); 3458 3459 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3460 SourceLocation Loc, 3461 DeclarationName Name); 3462 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3463 3464 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3465 3466 std::string 3467 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3468 const TemplateArgumentList &Args); 3469 3470 std::string 3471 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3472 const TemplateArgument *Args, 3473 unsigned NumArgs); 3474 3475 //===--------------------------------------------------------------------===// 3476 // C++ Variadic Templates (C++0x [temp.variadic]) 3477 //===--------------------------------------------------------------------===// 3478 3479 /// \brief The context in which an unexpanded parameter pack is 3480 /// being diagnosed. 3481 /// 3482 /// Note that the values of this enumeration line up with the first 3483 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3484 enum UnexpandedParameterPackContext { 3485 /// \brief An arbitrary expression. 3486 UPPC_Expression = 0, 3487 3488 /// \brief The base type of a class type. 3489 UPPC_BaseType, 3490 3491 /// \brief The type of an arbitrary declaration. 3492 UPPC_DeclarationType, 3493 3494 /// \brief The type of a data member. 3495 UPPC_DataMemberType, 3496 3497 /// \brief The size of a bit-field. 3498 UPPC_BitFieldWidth, 3499 3500 /// \brief The expression in a static assertion. 3501 UPPC_StaticAssertExpression, 3502 3503 /// \brief The fixed underlying type of an enumeration. 3504 UPPC_FixedUnderlyingType, 3505 3506 /// \brief The enumerator value. 3507 UPPC_EnumeratorValue, 3508 3509 /// \brief A using declaration. 3510 UPPC_UsingDeclaration, 3511 3512 /// \brief A friend declaration. 3513 UPPC_FriendDeclaration, 3514 3515 /// \brief A declaration qualifier. 3516 UPPC_DeclarationQualifier, 3517 3518 /// \brief An initializer. 3519 UPPC_Initializer, 3520 3521 /// \brief A default argument. 3522 UPPC_DefaultArgument, 3523 3524 /// \brief The type of a non-type template parameter. 3525 UPPC_NonTypeTemplateParameterType, 3526 3527 /// \brief The type of an exception. 3528 UPPC_ExceptionType, 3529 3530 /// \brief Partial specialization. 3531 UPPC_PartialSpecialization 3532 }; 3533 3534 /// \brief If the given type contains an unexpanded parameter pack, 3535 /// diagnose the error. 3536 /// 3537 /// \param Loc The source location where a diagnostc should be emitted. 3538 /// 3539 /// \param T The type that is being checked for unexpanded parameter 3540 /// packs. 3541 /// 3542 /// \returns true if an error ocurred, false otherwise. 3543 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3544 UnexpandedParameterPackContext UPPC); 3545 3546 /// \brief If the given expression contains an unexpanded parameter 3547 /// pack, diagnose the error. 3548 /// 3549 /// \param E The expression that is being checked for unexpanded 3550 /// parameter packs. 3551 /// 3552 /// \returns true if an error ocurred, false otherwise. 3553 bool DiagnoseUnexpandedParameterPack(Expr *E, 3554 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3555 3556 /// \brief If the given nested-name-specifier contains an unexpanded 3557 /// parameter pack, diagnose the error. 3558 /// 3559 /// \param SS The nested-name-specifier that is being checked for 3560 /// unexpanded parameter packs. 3561 /// 3562 /// \returns true if an error ocurred, false otherwise. 3563 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3564 UnexpandedParameterPackContext UPPC); 3565 3566 /// \brief If the given name contains an unexpanded parameter pack, 3567 /// diagnose the error. 3568 /// 3569 /// \param NameInfo The name (with source location information) that 3570 /// is being checked for unexpanded parameter packs. 3571 /// 3572 /// \returns true if an error ocurred, false otherwise. 3573 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3574 UnexpandedParameterPackContext UPPC); 3575 3576 /// \brief If the given template name contains an unexpanded parameter pack, 3577 /// diagnose the error. 3578 /// 3579 /// \param Loc The location of the template name. 3580 /// 3581 /// \param Template The template name that is being checked for unexpanded 3582 /// parameter packs. 3583 /// 3584 /// \returns true if an error ocurred, false otherwise. 3585 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3586 TemplateName Template, 3587 UnexpandedParameterPackContext UPPC); 3588 3589 /// \brief If the given template argument contains an unexpanded parameter 3590 /// pack, diagnose the error. 3591 /// 3592 /// \param Arg The template argument that is being checked for unexpanded 3593 /// parameter packs. 3594 /// 3595 /// \returns true if an error ocurred, false otherwise. 3596 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3597 UnexpandedParameterPackContext UPPC); 3598 3599 /// \brief Collect the set of unexpanded parameter packs within the given 3600 /// template argument. 3601 /// 3602 /// \param Arg The template argument that will be traversed to find 3603 /// unexpanded parameter packs. 3604 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3605 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3606 3607 /// \brief Collect the set of unexpanded parameter packs within the given 3608 /// template argument. 3609 /// 3610 /// \param Arg The template argument that will be traversed to find 3611 /// unexpanded parameter packs. 3612 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3613 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3614 3615 /// \brief Collect the set of unexpanded parameter packs within the given 3616 /// type. 3617 /// 3618 /// \param T The type that will be traversed to find 3619 /// unexpanded parameter packs. 3620 void collectUnexpandedParameterPacks(QualType T, 3621 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3622 3623 /// \brief Collect the set of unexpanded parameter packs within the given 3624 /// type. 3625 /// 3626 /// \param TL The type that will be traversed to find 3627 /// unexpanded parameter packs. 3628 void collectUnexpandedParameterPacks(TypeLoc TL, 3629 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3630 3631 /// \brief Invoked when parsing a template argument followed by an 3632 /// ellipsis, which creates a pack expansion. 3633 /// 3634 /// \param Arg The template argument preceding the ellipsis, which 3635 /// may already be invalid. 3636 /// 3637 /// \param EllipsisLoc The location of the ellipsis. 3638 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3639 SourceLocation EllipsisLoc); 3640 3641 /// \brief Invoked when parsing a type followed by an ellipsis, which 3642 /// creates a pack expansion. 3643 /// 3644 /// \param Type The type preceding the ellipsis, which will become 3645 /// the pattern of the pack expansion. 3646 /// 3647 /// \param EllipsisLoc The location of the ellipsis. 3648 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3649 3650 /// \brief Construct a pack expansion type from the pattern of the pack 3651 /// expansion. 3652 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3653 SourceLocation EllipsisLoc, 3654 llvm::Optional<unsigned> NumExpansions); 3655 3656 /// \brief Construct a pack expansion type from the pattern of the pack 3657 /// expansion. 3658 QualType CheckPackExpansion(QualType Pattern, 3659 SourceRange PatternRange, 3660 SourceLocation EllipsisLoc, 3661 llvm::Optional<unsigned> NumExpansions); 3662 3663 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3664 /// creates a pack expansion. 3665 /// 3666 /// \param Pattern The expression preceding the ellipsis, which will become 3667 /// the pattern of the pack expansion. 3668 /// 3669 /// \param EllipsisLoc The location of the ellipsis. 3670 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3671 3672 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3673 /// creates a pack expansion. 3674 /// 3675 /// \param Pattern The expression preceding the ellipsis, which will become 3676 /// the pattern of the pack expansion. 3677 /// 3678 /// \param EllipsisLoc The location of the ellipsis. 3679 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3680 llvm::Optional<unsigned> NumExpansions); 3681 3682 /// \brief Determine whether we could expand a pack expansion with the 3683 /// given set of parameter packs into separate arguments by repeatedly 3684 /// transforming the pattern. 3685 /// 3686 /// \param EllipsisLoc The location of the ellipsis that identifies the 3687 /// pack expansion. 3688 /// 3689 /// \param PatternRange The source range that covers the entire pattern of 3690 /// the pack expansion. 3691 /// 3692 /// \param Unexpanded The set of unexpanded parameter packs within the 3693 /// pattern. 3694 /// 3695 /// \param NumUnexpanded The number of unexpanded parameter packs in 3696 /// \p Unexpanded. 3697 /// 3698 /// \param ShouldExpand Will be set to \c true if the transformer should 3699 /// expand the corresponding pack expansions into separate arguments. When 3700 /// set, \c NumExpansions must also be set. 3701 /// 3702 /// \param RetainExpansion Whether the caller should add an unexpanded 3703 /// pack expansion after all of the expanded arguments. This is used 3704 /// when extending explicitly-specified template argument packs per 3705 /// C++0x [temp.arg.explicit]p9. 3706 /// 3707 /// \param NumExpansions The number of separate arguments that will be in 3708 /// the expanded form of the corresponding pack expansion. This is both an 3709 /// input and an output parameter, which can be set by the caller if the 3710 /// number of expansions is known a priori (e.g., due to a prior substitution) 3711 /// and will be set by the callee when the number of expansions is known. 3712 /// The callee must set this value when \c ShouldExpand is \c true; it may 3713 /// set this value in other cases. 3714 /// 3715 /// \returns true if an error occurred (e.g., because the parameter packs 3716 /// are to be instantiated with arguments of different lengths), false 3717 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3718 /// must be set. 3719 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3720 SourceRange PatternRange, 3721 const UnexpandedParameterPack *Unexpanded, 3722 unsigned NumUnexpanded, 3723 const MultiLevelTemplateArgumentList &TemplateArgs, 3724 bool &ShouldExpand, 3725 bool &RetainExpansion, 3726 llvm::Optional<unsigned> &NumExpansions); 3727 3728 /// \brief Determine the number of arguments in the given pack expansion 3729 /// type. 3730 /// 3731 /// This routine already assumes that the pack expansion type can be 3732 /// expanded and that the number of arguments in the expansion is 3733 /// consistent across all of the unexpanded parameter packs in its pattern. 3734 unsigned getNumArgumentsInExpansion(QualType T, 3735 const MultiLevelTemplateArgumentList &TemplateArgs); 3736 3737 /// \brief Determine whether the given declarator contains any unexpanded 3738 /// parameter packs. 3739 /// 3740 /// This routine is used by the parser to disambiguate function declarators 3741 /// with an ellipsis prior to the ')', e.g., 3742 /// 3743 /// \code 3744 /// void f(T...); 3745 /// \endcode 3746 /// 3747 /// To determine whether we have an (unnamed) function parameter pack or 3748 /// a variadic function. 3749 /// 3750 /// \returns true if the declarator contains any unexpanded parameter packs, 3751 /// false otherwise. 3752 bool containsUnexpandedParameterPacks(Declarator &D); 3753 3754 //===--------------------------------------------------------------------===// 3755 // C++ Template Argument Deduction (C++ [temp.deduct]) 3756 //===--------------------------------------------------------------------===// 3757 3758 /// \brief Describes the result of template argument deduction. 3759 /// 3760 /// The TemplateDeductionResult enumeration describes the result of 3761 /// template argument deduction, as returned from 3762 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3763 /// structure provides additional information about the results of 3764 /// template argument deduction, e.g., the deduced template argument 3765 /// list (if successful) or the specific template parameters or 3766 /// deduced arguments that were involved in the failure. 3767 enum TemplateDeductionResult { 3768 /// \brief Template argument deduction was successful. 3769 TDK_Success = 0, 3770 /// \brief Template argument deduction exceeded the maximum template 3771 /// instantiation depth (which has already been diagnosed). 3772 TDK_InstantiationDepth, 3773 /// \brief Template argument deduction did not deduce a value 3774 /// for every template parameter. 3775 TDK_Incomplete, 3776 /// \brief Template argument deduction produced inconsistent 3777 /// deduced values for the given template parameter. 3778 TDK_Inconsistent, 3779 /// \brief Template argument deduction failed due to inconsistent 3780 /// cv-qualifiers on a template parameter type that would 3781 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3782 /// but were given a non-const "X". 3783 TDK_Underqualified, 3784 /// \brief Substitution of the deduced template argument values 3785 /// resulted in an error. 3786 TDK_SubstitutionFailure, 3787 /// \brief Substitution of the deduced template argument values 3788 /// into a non-deduced context produced a type or value that 3789 /// produces a type that does not match the original template 3790 /// arguments provided. 3791 TDK_NonDeducedMismatch, 3792 /// \brief When performing template argument deduction for a function 3793 /// template, there were too many call arguments. 3794 TDK_TooManyArguments, 3795 /// \brief When performing template argument deduction for a function 3796 /// template, there were too few call arguments. 3797 TDK_TooFewArguments, 3798 /// \brief The explicitly-specified template arguments were not valid 3799 /// template arguments for the given template. 3800 TDK_InvalidExplicitArguments, 3801 /// \brief The arguments included an overloaded function name that could 3802 /// not be resolved to a suitable function. 3803 TDK_FailedOverloadResolution 3804 }; 3805 3806 TemplateDeductionResult 3807 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3808 const TemplateArgumentList &TemplateArgs, 3809 sema::TemplateDeductionInfo &Info); 3810 3811 TemplateDeductionResult 3812 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3813 TemplateArgumentListInfo &ExplicitTemplateArgs, 3814 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3815 llvm::SmallVectorImpl<QualType> &ParamTypes, 3816 QualType *FunctionType, 3817 sema::TemplateDeductionInfo &Info); 3818 3819 TemplateDeductionResult 3820 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3821 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3822 unsigned NumExplicitlySpecified, 3823 FunctionDecl *&Specialization, 3824 sema::TemplateDeductionInfo &Info); 3825 3826 TemplateDeductionResult 3827 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3828 TemplateArgumentListInfo *ExplicitTemplateArgs, 3829 Expr **Args, unsigned NumArgs, 3830 FunctionDecl *&Specialization, 3831 sema::TemplateDeductionInfo &Info); 3832 3833 TemplateDeductionResult 3834 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3835 TemplateArgumentListInfo *ExplicitTemplateArgs, 3836 QualType ArgFunctionType, 3837 FunctionDecl *&Specialization, 3838 sema::TemplateDeductionInfo &Info); 3839 3840 TemplateDeductionResult 3841 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3842 QualType ToType, 3843 CXXConversionDecl *&Specialization, 3844 sema::TemplateDeductionInfo &Info); 3845 3846 TemplateDeductionResult 3847 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3848 TemplateArgumentListInfo *ExplicitTemplateArgs, 3849 FunctionDecl *&Specialization, 3850 sema::TemplateDeductionInfo &Info); 3851 3852 bool DeduceAutoType(QualType AutoType, Expr *Initializer, QualType &Result); 3853 3854 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3855 FunctionTemplateDecl *FT2, 3856 SourceLocation Loc, 3857 TemplatePartialOrderingContext TPOC, 3858 unsigned NumCallArguments); 3859 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3860 UnresolvedSetIterator SEnd, 3861 TemplatePartialOrderingContext TPOC, 3862 unsigned NumCallArguments, 3863 SourceLocation Loc, 3864 const PartialDiagnostic &NoneDiag, 3865 const PartialDiagnostic &AmbigDiag, 3866 const PartialDiagnostic &CandidateDiag, 3867 bool Complain = true); 3868 3869 ClassTemplatePartialSpecializationDecl * 3870 getMoreSpecializedPartialSpecialization( 3871 ClassTemplatePartialSpecializationDecl *PS1, 3872 ClassTemplatePartialSpecializationDecl *PS2, 3873 SourceLocation Loc); 3874 3875 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3876 bool OnlyDeduced, 3877 unsigned Depth, 3878 llvm::SmallVectorImpl<bool> &Used); 3879 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3880 llvm::SmallVectorImpl<bool> &Deduced); 3881 3882 //===--------------------------------------------------------------------===// 3883 // C++ Template Instantiation 3884 // 3885 3886 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3887 const TemplateArgumentList *Innermost = 0, 3888 bool RelativeToPrimary = false, 3889 const FunctionDecl *Pattern = 0); 3890 3891 /// \brief A template instantiation that is currently in progress. 3892 struct ActiveTemplateInstantiation { 3893 /// \brief The kind of template instantiation we are performing 3894 enum InstantiationKind { 3895 /// We are instantiating a template declaration. The entity is 3896 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3897 TemplateInstantiation, 3898 3899 /// We are instantiating a default argument for a template 3900 /// parameter. The Entity is the template, and 3901 /// TemplateArgs/NumTemplateArguments provides the template 3902 /// arguments as specified. 3903 /// FIXME: Use a TemplateArgumentList 3904 DefaultTemplateArgumentInstantiation, 3905 3906 /// We are instantiating a default argument for a function. 3907 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3908 /// provides the template arguments as specified. 3909 DefaultFunctionArgumentInstantiation, 3910 3911 /// We are substituting explicit template arguments provided for 3912 /// a function template. The entity is a FunctionTemplateDecl. 3913 ExplicitTemplateArgumentSubstitution, 3914 3915 /// We are substituting template argument determined as part of 3916 /// template argument deduction for either a class template 3917 /// partial specialization or a function template. The 3918 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3919 /// a FunctionTemplateDecl. 3920 DeducedTemplateArgumentSubstitution, 3921 3922 /// We are substituting prior template arguments into a new 3923 /// template parameter. The template parameter itself is either a 3924 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3925 PriorTemplateArgumentSubstitution, 3926 3927 /// We are checking the validity of a default template argument that 3928 /// has been used when naming a template-id. 3929 DefaultTemplateArgumentChecking 3930 } Kind; 3931 3932 /// \brief The point of instantiation within the source code. 3933 SourceLocation PointOfInstantiation; 3934 3935 /// \brief The template (or partial specialization) in which we are 3936 /// performing the instantiation, for substitutions of prior template 3937 /// arguments. 3938 NamedDecl *Template; 3939 3940 /// \brief The entity that is being instantiated. 3941 uintptr_t Entity; 3942 3943 /// \brief The list of template arguments we are substituting, if they 3944 /// are not part of the entity. 3945 const TemplateArgument *TemplateArgs; 3946 3947 /// \brief The number of template arguments in TemplateArgs. 3948 unsigned NumTemplateArgs; 3949 3950 /// \brief The template deduction info object associated with the 3951 /// substitution or checking of explicit or deduced template arguments. 3952 sema::TemplateDeductionInfo *DeductionInfo; 3953 3954 /// \brief The source range that covers the construct that cause 3955 /// the instantiation, e.g., the template-id that causes a class 3956 /// template instantiation. 3957 SourceRange InstantiationRange; 3958 3959 ActiveTemplateInstantiation() 3960 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 3961 NumTemplateArgs(0), DeductionInfo(0) {} 3962 3963 /// \brief Determines whether this template is an actual instantiation 3964 /// that should be counted toward the maximum instantiation depth. 3965 bool isInstantiationRecord() const; 3966 3967 friend bool operator==(const ActiveTemplateInstantiation &X, 3968 const ActiveTemplateInstantiation &Y) { 3969 if (X.Kind != Y.Kind) 3970 return false; 3971 3972 if (X.Entity != Y.Entity) 3973 return false; 3974 3975 switch (X.Kind) { 3976 case TemplateInstantiation: 3977 return true; 3978 3979 case PriorTemplateArgumentSubstitution: 3980 case DefaultTemplateArgumentChecking: 3981 if (X.Template != Y.Template) 3982 return false; 3983 3984 // Fall through 3985 3986 case DefaultTemplateArgumentInstantiation: 3987 case ExplicitTemplateArgumentSubstitution: 3988 case DeducedTemplateArgumentSubstitution: 3989 case DefaultFunctionArgumentInstantiation: 3990 return X.TemplateArgs == Y.TemplateArgs; 3991 3992 } 3993 3994 return true; 3995 } 3996 3997 friend bool operator!=(const ActiveTemplateInstantiation &X, 3998 const ActiveTemplateInstantiation &Y) { 3999 return !(X == Y); 4000 } 4001 }; 4002 4003 /// \brief List of active template instantiations. 4004 /// 4005 /// This vector is treated as a stack. As one template instantiation 4006 /// requires another template instantiation, additional 4007 /// instantiations are pushed onto the stack up to a 4008 /// user-configurable limit LangOptions::InstantiationDepth. 4009 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4010 ActiveTemplateInstantiations; 4011 4012 /// \brief Whether we are in a SFINAE context that is not associated with 4013 /// template instantiation. 4014 /// 4015 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4016 /// of a template instantiation or template argument deduction. 4017 bool InNonInstantiationSFINAEContext; 4018 4019 /// \brief The number of ActiveTemplateInstantiation entries in 4020 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4021 /// therefore, should not be counted as part of the instantiation depth. 4022 unsigned NonInstantiationEntries; 4023 4024 /// \brief The last template from which a template instantiation 4025 /// error or warning was produced. 4026 /// 4027 /// This value is used to suppress printing of redundant template 4028 /// instantiation backtraces when there are multiple errors in the 4029 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4030 /// to implement it anywhere else. 4031 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4032 4033 /// \brief The current index into pack expansion arguments that will be 4034 /// used for substitution of parameter packs. 4035 /// 4036 /// The pack expansion index will be -1 to indicate that parameter packs 4037 /// should be instantiated as themselves. Otherwise, the index specifies 4038 /// which argument within the parameter pack will be used for substitution. 4039 int ArgumentPackSubstitutionIndex; 4040 4041 /// \brief RAII object used to change the argument pack substitution index 4042 /// within a \c Sema object. 4043 /// 4044 /// See \c ArgumentPackSubstitutionIndex for more information. 4045 class ArgumentPackSubstitutionIndexRAII { 4046 Sema &Self; 4047 int OldSubstitutionIndex; 4048 4049 public: 4050 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4051 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4052 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4053 } 4054 4055 ~ArgumentPackSubstitutionIndexRAII() { 4056 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4057 } 4058 }; 4059 4060 friend class ArgumentPackSubstitutionRAII; 4061 4062 /// \brief The stack of calls expression undergoing template instantiation. 4063 /// 4064 /// The top of this stack is used by a fixit instantiating unresolved 4065 /// function calls to fix the AST to match the textual change it prints. 4066 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4067 4068 /// \brief For each declaration that involved template argument deduction, the 4069 /// set of diagnostics that were suppressed during that template argument 4070 /// deduction. 4071 /// 4072 /// FIXME: Serialize this structure to the AST file. 4073 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4074 SuppressedDiagnostics; 4075 4076 /// \brief A stack object to be created when performing template 4077 /// instantiation. 4078 /// 4079 /// Construction of an object of type \c InstantiatingTemplate 4080 /// pushes the current instantiation onto the stack of active 4081 /// instantiations. If the size of this stack exceeds the maximum 4082 /// number of recursive template instantiations, construction 4083 /// produces an error and evaluates true. 4084 /// 4085 /// Destruction of this object will pop the named instantiation off 4086 /// the stack. 4087 struct InstantiatingTemplate { 4088 /// \brief Note that we are instantiating a class template, 4089 /// function template, or a member thereof. 4090 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4091 Decl *Entity, 4092 SourceRange InstantiationRange = SourceRange()); 4093 4094 /// \brief Note that we are instantiating a default argument in a 4095 /// template-id. 4096 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4097 TemplateDecl *Template, 4098 const TemplateArgument *TemplateArgs, 4099 unsigned NumTemplateArgs, 4100 SourceRange InstantiationRange = SourceRange()); 4101 4102 /// \brief Note that we are instantiating a default argument in a 4103 /// template-id. 4104 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4105 FunctionTemplateDecl *FunctionTemplate, 4106 const TemplateArgument *TemplateArgs, 4107 unsigned NumTemplateArgs, 4108 ActiveTemplateInstantiation::InstantiationKind Kind, 4109 sema::TemplateDeductionInfo &DeductionInfo, 4110 SourceRange InstantiationRange = SourceRange()); 4111 4112 /// \brief Note that we are instantiating as part of template 4113 /// argument deduction for a class template partial 4114 /// specialization. 4115 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4116 ClassTemplatePartialSpecializationDecl *PartialSpec, 4117 const TemplateArgument *TemplateArgs, 4118 unsigned NumTemplateArgs, 4119 sema::TemplateDeductionInfo &DeductionInfo, 4120 SourceRange InstantiationRange = SourceRange()); 4121 4122 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4123 ParmVarDecl *Param, 4124 const TemplateArgument *TemplateArgs, 4125 unsigned NumTemplateArgs, 4126 SourceRange InstantiationRange = SourceRange()); 4127 4128 /// \brief Note that we are substituting prior template arguments into a 4129 /// non-type or template template parameter. 4130 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4131 NamedDecl *Template, 4132 NonTypeTemplateParmDecl *Param, 4133 const TemplateArgument *TemplateArgs, 4134 unsigned NumTemplateArgs, 4135 SourceRange InstantiationRange); 4136 4137 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4138 NamedDecl *Template, 4139 TemplateTemplateParmDecl *Param, 4140 const TemplateArgument *TemplateArgs, 4141 unsigned NumTemplateArgs, 4142 SourceRange InstantiationRange); 4143 4144 /// \brief Note that we are checking the default template argument 4145 /// against the template parameter for a given template-id. 4146 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4147 TemplateDecl *Template, 4148 NamedDecl *Param, 4149 const TemplateArgument *TemplateArgs, 4150 unsigned NumTemplateArgs, 4151 SourceRange InstantiationRange); 4152 4153 4154 /// \brief Note that we have finished instantiating this template. 4155 void Clear(); 4156 4157 ~InstantiatingTemplate() { Clear(); } 4158 4159 /// \brief Determines whether we have exceeded the maximum 4160 /// recursive template instantiations. 4161 operator bool() const { return Invalid; } 4162 4163 private: 4164 Sema &SemaRef; 4165 bool Invalid; 4166 bool SavedInNonInstantiationSFINAEContext; 4167 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4168 SourceRange InstantiationRange); 4169 4170 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4171 4172 InstantiatingTemplate& 4173 operator=(const InstantiatingTemplate&); // not implemented 4174 }; 4175 4176 void PrintInstantiationStack(); 4177 4178 /// \brief Determines whether we are currently in a context where 4179 /// template argument substitution failures are not considered 4180 /// errors. 4181 /// 4182 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4183 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4184 /// template-deduction context object, which can be used to capture 4185 /// diagnostics that will be suppressed. 4186 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4187 4188 /// \brief RAII class used to determine whether SFINAE has 4189 /// trapped any errors that occur during template argument 4190 /// deduction.` 4191 class SFINAETrap { 4192 Sema &SemaRef; 4193 unsigned PrevSFINAEErrors; 4194 bool PrevInNonInstantiationSFINAEContext; 4195 bool PrevAccessCheckingSFINAE; 4196 4197 public: 4198 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4199 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4200 PrevInNonInstantiationSFINAEContext( 4201 SemaRef.InNonInstantiationSFINAEContext), 4202 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4203 { 4204 if (!SemaRef.isSFINAEContext()) 4205 SemaRef.InNonInstantiationSFINAEContext = true; 4206 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4207 } 4208 4209 ~SFINAETrap() { 4210 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4211 SemaRef.InNonInstantiationSFINAEContext 4212 = PrevInNonInstantiationSFINAEContext; 4213 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4214 } 4215 4216 /// \brief Determine whether any SFINAE errors have been trapped. 4217 bool hasErrorOccurred() const { 4218 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4219 } 4220 }; 4221 4222 /// \brief The current instantiation scope used to store local 4223 /// variables. 4224 LocalInstantiationScope *CurrentInstantiationScope; 4225 4226 /// \brief The number of typos corrected by CorrectTypo. 4227 unsigned TyposCorrected; 4228 4229 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4230 UnqualifiedTyposCorrectedMap; 4231 4232 /// \brief A cache containing the results of typo correction for unqualified 4233 /// name lookup. 4234 /// 4235 /// The string is the string that we corrected to (which may be empty, if 4236 /// there was no correction), while the boolean will be true when the 4237 /// string represents a keyword. 4238 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4239 4240 /// \brief Worker object for performing CFG-based warnings. 4241 sema::AnalysisBasedWarnings AnalysisWarnings; 4242 4243 /// \brief An entity for which implicit template instantiation is required. 4244 /// 4245 /// The source location associated with the declaration is the first place in 4246 /// the source code where the declaration was "used". It is not necessarily 4247 /// the point of instantiation (which will be either before or after the 4248 /// namespace-scope declaration that triggered this implicit instantiation), 4249 /// However, it is the location that diagnostics should generally refer to, 4250 /// because users will need to know what code triggered the instantiation. 4251 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4252 4253 /// \brief The queue of implicit template instantiations that are required 4254 /// but have not yet been performed. 4255 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4256 4257 /// \brief The queue of implicit template instantiations that are required 4258 /// and must be performed within the current local scope. 4259 /// 4260 /// This queue is only used for member functions of local classes in 4261 /// templates, which must be instantiated in the same scope as their 4262 /// enclosing function, so that they can reference function-local 4263 /// types, static variables, enumerators, etc. 4264 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4265 4266 void PerformPendingInstantiations(bool LocalOnly = false); 4267 4268 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4269 const MultiLevelTemplateArgumentList &TemplateArgs, 4270 SourceLocation Loc, DeclarationName Entity); 4271 4272 QualType SubstType(QualType T, 4273 const MultiLevelTemplateArgumentList &TemplateArgs, 4274 SourceLocation Loc, DeclarationName Entity); 4275 4276 TypeSourceInfo *SubstType(TypeLoc TL, 4277 const MultiLevelTemplateArgumentList &TemplateArgs, 4278 SourceLocation Loc, DeclarationName Entity); 4279 4280 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4281 const MultiLevelTemplateArgumentList &TemplateArgs, 4282 SourceLocation Loc, 4283 DeclarationName Entity); 4284 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4285 const MultiLevelTemplateArgumentList &TemplateArgs, 4286 llvm::Optional<unsigned> NumExpansions); 4287 bool SubstParmTypes(SourceLocation Loc, 4288 ParmVarDecl **Params, unsigned NumParams, 4289 const MultiLevelTemplateArgumentList &TemplateArgs, 4290 llvm::SmallVectorImpl<QualType> &ParamTypes, 4291 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4292 ExprResult SubstExpr(Expr *E, 4293 const MultiLevelTemplateArgumentList &TemplateArgs); 4294 4295 /// \brief Substitute the given template arguments into a list of 4296 /// expressions, expanding pack expansions if required. 4297 /// 4298 /// \param Exprs The list of expressions to substitute into. 4299 /// 4300 /// \param NumExprs The number of expressions in \p Exprs. 4301 /// 4302 /// \param IsCall Whether this is some form of call, in which case 4303 /// default arguments will be dropped. 4304 /// 4305 /// \param TemplateArgs The set of template arguments to substitute. 4306 /// 4307 /// \param Outputs Will receive all of the substituted arguments. 4308 /// 4309 /// \returns true if an error occurred, false otherwise. 4310 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4311 const MultiLevelTemplateArgumentList &TemplateArgs, 4312 llvm::SmallVectorImpl<Expr *> &Outputs); 4313 4314 StmtResult SubstStmt(Stmt *S, 4315 const MultiLevelTemplateArgumentList &TemplateArgs); 4316 4317 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4318 const MultiLevelTemplateArgumentList &TemplateArgs); 4319 4320 bool 4321 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4322 CXXRecordDecl *Pattern, 4323 const MultiLevelTemplateArgumentList &TemplateArgs); 4324 4325 bool 4326 InstantiateClass(SourceLocation PointOfInstantiation, 4327 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4328 const MultiLevelTemplateArgumentList &TemplateArgs, 4329 TemplateSpecializationKind TSK, 4330 bool Complain = true); 4331 4332 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4333 Decl *Pattern, Decl *Inst); 4334 4335 bool 4336 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4337 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4338 TemplateSpecializationKind TSK, 4339 bool Complain = true); 4340 4341 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4342 CXXRecordDecl *Instantiation, 4343 const MultiLevelTemplateArgumentList &TemplateArgs, 4344 TemplateSpecializationKind TSK); 4345 4346 void InstantiateClassTemplateSpecializationMembers( 4347 SourceLocation PointOfInstantiation, 4348 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4349 TemplateSpecializationKind TSK); 4350 4351 NestedNameSpecifierLoc 4352 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4353 const MultiLevelTemplateArgumentList &TemplateArgs); 4354 4355 DeclarationNameInfo 4356 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4357 const MultiLevelTemplateArgumentList &TemplateArgs); 4358 TemplateName 4359 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4360 SourceLocation Loc, 4361 const MultiLevelTemplateArgumentList &TemplateArgs); 4362 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4363 TemplateArgumentListInfo &Result, 4364 const MultiLevelTemplateArgumentList &TemplateArgs); 4365 4366 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4367 FunctionDecl *Function, 4368 bool Recursive = false, 4369 bool DefinitionRequired = false); 4370 void InstantiateStaticDataMemberDefinition( 4371 SourceLocation PointOfInstantiation, 4372 VarDecl *Var, 4373 bool Recursive = false, 4374 bool DefinitionRequired = false); 4375 4376 void InstantiateMemInitializers(CXXConstructorDecl *New, 4377 const CXXConstructorDecl *Tmpl, 4378 const MultiLevelTemplateArgumentList &TemplateArgs); 4379 4380 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4381 const MultiLevelTemplateArgumentList &TemplateArgs); 4382 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4383 const MultiLevelTemplateArgumentList &TemplateArgs); 4384 4385 // Objective-C declarations. 4386 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4387 IdentifierInfo *ClassName, 4388 SourceLocation ClassLoc, 4389 IdentifierInfo *SuperName, 4390 SourceLocation SuperLoc, 4391 Decl * const *ProtoRefs, 4392 unsigned NumProtoRefs, 4393 const SourceLocation *ProtoLocs, 4394 SourceLocation EndProtoLoc, 4395 AttributeList *AttrList); 4396 4397 Decl *ActOnCompatiblityAlias( 4398 SourceLocation AtCompatibilityAliasLoc, 4399 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4400 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4401 4402 void CheckForwardProtocolDeclarationForCircularDependency( 4403 IdentifierInfo *PName, 4404 SourceLocation &PLoc, SourceLocation PrevLoc, 4405 const ObjCList<ObjCProtocolDecl> &PList); 4406 4407 Decl *ActOnStartProtocolInterface( 4408 SourceLocation AtProtoInterfaceLoc, 4409 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4410 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4411 const SourceLocation *ProtoLocs, 4412 SourceLocation EndProtoLoc, 4413 AttributeList *AttrList); 4414 4415 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4416 IdentifierInfo *ClassName, 4417 SourceLocation ClassLoc, 4418 IdentifierInfo *CategoryName, 4419 SourceLocation CategoryLoc, 4420 Decl * const *ProtoRefs, 4421 unsigned NumProtoRefs, 4422 const SourceLocation *ProtoLocs, 4423 SourceLocation EndProtoLoc); 4424 4425 Decl *ActOnStartClassImplementation( 4426 SourceLocation AtClassImplLoc, 4427 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4428 IdentifierInfo *SuperClassname, 4429 SourceLocation SuperClassLoc); 4430 4431 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4432 IdentifierInfo *ClassName, 4433 SourceLocation ClassLoc, 4434 IdentifierInfo *CatName, 4435 SourceLocation CatLoc); 4436 4437 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4438 IdentifierInfo **IdentList, 4439 SourceLocation *IdentLocs, 4440 unsigned NumElts); 4441 4442 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4443 const IdentifierLocPair *IdentList, 4444 unsigned NumElts, 4445 AttributeList *attrList); 4446 4447 void FindProtocolDeclaration(bool WarnOnDeclarations, 4448 const IdentifierLocPair *ProtocolId, 4449 unsigned NumProtocols, 4450 llvm::SmallVectorImpl<Decl *> &Protocols); 4451 4452 /// Ensure attributes are consistent with type. 4453 /// \param [in, out] Attributes The attributes to check; they will 4454 /// be modified to be consistent with \arg PropertyTy. 4455 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4456 SourceLocation Loc, 4457 unsigned &Attributes); 4458 4459 /// Process the specified property declaration and create decls for the 4460 /// setters and getters as needed. 4461 /// \param property The property declaration being processed 4462 /// \param DC The semantic container for the property 4463 /// \param redeclaredProperty Declaration for property if redeclared 4464 /// in class extension. 4465 /// \param lexicalDC Container for redeclaredProperty. 4466 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4467 ObjCContainerDecl *DC, 4468 ObjCPropertyDecl *redeclaredProperty = 0, 4469 ObjCContainerDecl *lexicalDC = 0); 4470 4471 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4472 ObjCPropertyDecl *SuperProperty, 4473 const IdentifierInfo *Name); 4474 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4475 4476 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4477 ObjCMethodDecl *MethodDecl, 4478 bool IsInstance); 4479 4480 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4481 4482 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4483 ObjCInterfaceDecl *ID); 4484 4485 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4486 ObjCProtocolDecl *PDecl); 4487 4488 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4489 Decl **allMethods = 0, unsigned allNum = 0, 4490 Decl **allProperties = 0, unsigned pNum = 0, 4491 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4492 4493 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4494 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4495 Selector GetterSel, Selector SetterSel, 4496 Decl *ClassCategory, 4497 bool *OverridingProperty, 4498 tok::ObjCKeywordKind MethodImplKind, 4499 DeclContext *lexicalDC = 0); 4500 4501 Decl *ActOnPropertyImplDecl(Scope *S, 4502 SourceLocation AtLoc, 4503 SourceLocation PropertyLoc, 4504 bool ImplKind,Decl *ClassImplDecl, 4505 IdentifierInfo *PropertyId, 4506 IdentifierInfo *PropertyIvar, 4507 SourceLocation PropertyIvarLoc); 4508 4509 struct ObjCArgInfo { 4510 IdentifierInfo *Name; 4511 SourceLocation NameLoc; 4512 // The Type is null if no type was specified, and the DeclSpec is invalid 4513 // in this case. 4514 ParsedType Type; 4515 ObjCDeclSpec DeclSpec; 4516 4517 /// ArgAttrs - Attribute list for this argument. 4518 AttributeList *ArgAttrs; 4519 }; 4520 4521 Decl *ActOnMethodDeclaration( 4522 Scope *S, 4523 SourceLocation BeginLoc, // location of the + or -. 4524 SourceLocation EndLoc, // location of the ; or {. 4525 tok::TokenKind MethodType, 4526 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4527 Selector Sel, 4528 // optional arguments. The number of types/arguments is obtained 4529 // from the Sel.getNumArgs(). 4530 ObjCArgInfo *ArgInfo, 4531 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4532 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4533 bool isVariadic = false); 4534 4535 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4536 // Will search "local" class/category implementations for a method decl. 4537 // Will also search in class's root looking for instance method. 4538 // Returns 0 if no method is found. 4539 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4540 ObjCInterfaceDecl *CDecl); 4541 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4542 ObjCInterfaceDecl *ClassDecl); 4543 4544 ExprResult 4545 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4546 Expr *BaseExpr, 4547 DeclarationName MemberName, 4548 SourceLocation MemberLoc, 4549 SourceLocation SuperLoc, QualType SuperType, 4550 bool Super); 4551 4552 ExprResult 4553 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4554 IdentifierInfo &propertyName, 4555 SourceLocation receiverNameLoc, 4556 SourceLocation propertyNameLoc); 4557 4558 ObjCMethodDecl *tryCaptureObjCSelf(); 4559 4560 /// \brief Describes the kind of message expression indicated by a message 4561 /// send that starts with an identifier. 4562 enum ObjCMessageKind { 4563 /// \brief The message is sent to 'super'. 4564 ObjCSuperMessage, 4565 /// \brief The message is an instance message. 4566 ObjCInstanceMessage, 4567 /// \brief The message is a class message, and the identifier is a type 4568 /// name. 4569 ObjCClassMessage 4570 }; 4571 4572 ObjCMessageKind getObjCMessageKind(Scope *S, 4573 IdentifierInfo *Name, 4574 SourceLocation NameLoc, 4575 bool IsSuper, 4576 bool HasTrailingDot, 4577 ParsedType &ReceiverType); 4578 4579 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4580 Selector Sel, 4581 SourceLocation LBracLoc, 4582 SourceLocation SelectorLoc, 4583 SourceLocation RBracLoc, 4584 MultiExprArg Args); 4585 4586 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4587 QualType ReceiverType, 4588 SourceLocation SuperLoc, 4589 Selector Sel, 4590 ObjCMethodDecl *Method, 4591 SourceLocation LBracLoc, 4592 SourceLocation SelectorLoc, 4593 SourceLocation RBracLoc, 4594 MultiExprArg Args); 4595 4596 ExprResult ActOnClassMessage(Scope *S, 4597 ParsedType Receiver, 4598 Selector Sel, 4599 SourceLocation LBracLoc, 4600 SourceLocation SelectorLoc, 4601 SourceLocation RBracLoc, 4602 MultiExprArg Args); 4603 4604 ExprResult BuildInstanceMessage(Expr *Receiver, 4605 QualType ReceiverType, 4606 SourceLocation SuperLoc, 4607 Selector Sel, 4608 ObjCMethodDecl *Method, 4609 SourceLocation LBracLoc, 4610 SourceLocation SelectorLoc, 4611 SourceLocation RBracLoc, 4612 MultiExprArg Args); 4613 4614 ExprResult ActOnInstanceMessage(Scope *S, 4615 Expr *Receiver, 4616 Selector Sel, 4617 SourceLocation LBracLoc, 4618 SourceLocation SelectorLoc, 4619 SourceLocation RBracLoc, 4620 MultiExprArg Args); 4621 4622 4623 enum PragmaOptionsAlignKind { 4624 POAK_Native, // #pragma options align=native 4625 POAK_Natural, // #pragma options align=natural 4626 POAK_Packed, // #pragma options align=packed 4627 POAK_Power, // #pragma options align=power 4628 POAK_Mac68k, // #pragma options align=mac68k 4629 POAK_Reset // #pragma options align=reset 4630 }; 4631 4632 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4633 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4634 SourceLocation PragmaLoc, 4635 SourceLocation KindLoc); 4636 4637 enum PragmaPackKind { 4638 PPK_Default, // #pragma pack([n]) 4639 PPK_Show, // #pragma pack(show), only supported by MSVC. 4640 PPK_Push, // #pragma pack(push, [identifier], [n]) 4641 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4642 }; 4643 4644 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4645 void ActOnPragmaPack(PragmaPackKind Kind, 4646 IdentifierInfo *Name, 4647 Expr *Alignment, 4648 SourceLocation PragmaLoc, 4649 SourceLocation LParenLoc, 4650 SourceLocation RParenLoc); 4651 4652 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4653 void ActOnPragmaUnused(const Token &Identifier, 4654 Scope *curScope, 4655 SourceLocation PragmaLoc); 4656 4657 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4658 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4659 SourceLocation PragmaLoc); 4660 4661 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4662 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4663 4664 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4665 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4666 SourceLocation PragmaLoc, 4667 SourceLocation WeakNameLoc); 4668 4669 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4670 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4671 IdentifierInfo* AliasName, 4672 SourceLocation PragmaLoc, 4673 SourceLocation WeakNameLoc, 4674 SourceLocation AliasNameLoc); 4675 4676 /// ActOnPragmaFPContract - Called on well formed 4677 /// #pragma {STDC,OPENCL} FP_CONTRACT 4678 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4679 4680 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4681 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4682 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4683 4684 /// FreePackedContext - Deallocate and null out PackContext. 4685 void FreePackedContext(); 4686 4687 /// PushNamespaceVisibilityAttr - Note that we've entered a 4688 /// namespace with a visibility attribute. 4689 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4690 4691 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4692 /// add an appropriate visibility attribute. 4693 void AddPushedVisibilityAttribute(Decl *RD); 4694 4695 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4696 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4697 void PopPragmaVisibility(); 4698 4699 /// FreeVisContext - Deallocate and null out VisContext. 4700 void FreeVisContext(); 4701 4702 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4703 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4704 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4705 4706 /// CastCategory - Get the correct forwarded implicit cast result category 4707 /// from the inner expression. 4708 ExprValueKind CastCategory(Expr *E); 4709 4710 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4711 /// cast. If there is already an implicit cast, merge into the existing one. 4712 /// If isLvalue, the result of the cast is an lvalue. 4713 void ImpCastExprToType(Expr *&Expr, QualType Type, CastKind CK, 4714 ExprValueKind VK = VK_RValue, 4715 const CXXCastPath *BasePath = 0); 4716 4717 /// IgnoredValueConversions - Given that an expression's result is 4718 /// syntactically ignored, perform any conversions that are 4719 /// required. 4720 void IgnoredValueConversions(Expr *&expr); 4721 4722 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4723 // functions and arrays to their respective pointers (C99 6.3.2.1). 4724 Expr *UsualUnaryConversions(Expr *&expr); 4725 4726 // DefaultFunctionArrayConversion - converts functions and arrays 4727 // to their respective pointers (C99 6.3.2.1). 4728 void DefaultFunctionArrayConversion(Expr *&expr); 4729 4730 // DefaultFunctionArrayLvalueConversion - converts functions and 4731 // arrays to their respective pointers and performs the 4732 // lvalue-to-rvalue conversion. 4733 void DefaultFunctionArrayLvalueConversion(Expr *&expr); 4734 4735 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4736 // the operand. This is DefaultFunctionArrayLvalueConversion, 4737 // except that it assumes the operand isn't of function or array 4738 // type. 4739 void DefaultLvalueConversion(Expr *&expr); 4740 4741 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4742 // do not have a prototype. Integer promotions are performed on each 4743 // argument, and arguments that have type float are promoted to double. 4744 void DefaultArgumentPromotion(Expr *&Expr); 4745 4746 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4747 enum VariadicCallType { 4748 VariadicFunction, 4749 VariadicBlock, 4750 VariadicMethod, 4751 VariadicConstructor, 4752 VariadicDoesNotApply 4753 }; 4754 4755 /// GatherArgumentsForCall - Collector argument expressions for various 4756 /// form of call prototypes. 4757 bool GatherArgumentsForCall(SourceLocation CallLoc, 4758 FunctionDecl *FDecl, 4759 const FunctionProtoType *Proto, 4760 unsigned FirstProtoArg, 4761 Expr **Args, unsigned NumArgs, 4762 llvm::SmallVector<Expr *, 8> &AllArgs, 4763 VariadicCallType CallType = VariadicDoesNotApply); 4764 4765 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4766 // will warn if the resulting type is not a POD type. 4767 bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT, 4768 FunctionDecl *FDecl); 4769 4770 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4771 // operands and then handles various conversions that are common to binary 4772 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4773 // routine returns the first non-arithmetic type found. The client is 4774 // responsible for emitting appropriate error diagnostics. 4775 QualType UsualArithmeticConversions(Expr *&lExpr, Expr *&rExpr, 4776 bool isCompAssign = false); 4777 4778 /// AssignConvertType - All of the 'assignment' semantic checks return this 4779 /// enum to indicate whether the assignment was allowed. These checks are 4780 /// done for simple assignments, as well as initialization, return from 4781 /// function, argument passing, etc. The query is phrased in terms of a 4782 /// source and destination type. 4783 enum AssignConvertType { 4784 /// Compatible - the types are compatible according to the standard. 4785 Compatible, 4786 4787 /// PointerToInt - The assignment converts a pointer to an int, which we 4788 /// accept as an extension. 4789 PointerToInt, 4790 4791 /// IntToPointer - The assignment converts an int to a pointer, which we 4792 /// accept as an extension. 4793 IntToPointer, 4794 4795 /// FunctionVoidPointer - The assignment is between a function pointer and 4796 /// void*, which the standard doesn't allow, but we accept as an extension. 4797 FunctionVoidPointer, 4798 4799 /// IncompatiblePointer - The assignment is between two pointers types that 4800 /// are not compatible, but we accept them as an extension. 4801 IncompatiblePointer, 4802 4803 /// IncompatiblePointer - The assignment is between two pointers types which 4804 /// point to integers which have a different sign, but are otherwise identical. 4805 /// This is a subset of the above, but broken out because it's by far the most 4806 /// common case of incompatible pointers. 4807 IncompatiblePointerSign, 4808 4809 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4810 /// c/v/r qualifiers, which we accept as an extension. 4811 CompatiblePointerDiscardsQualifiers, 4812 4813 /// IncompatiblePointerDiscardsQualifiers - The assignment 4814 /// discards qualifiers that we don't permit to be discarded, 4815 /// like address spaces. 4816 IncompatiblePointerDiscardsQualifiers, 4817 4818 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4819 /// nested pointer types, and the qualifiers other than the first two 4820 /// levels differ e.g. char ** -> const char **, but we accept them as an 4821 /// extension. 4822 IncompatibleNestedPointerQualifiers, 4823 4824 /// IncompatibleVectors - The assignment is between two vector types that 4825 /// have the same size, which we accept as an extension. 4826 IncompatibleVectors, 4827 4828 /// IntToBlockPointer - The assignment converts an int to a block 4829 /// pointer. We disallow this. 4830 IntToBlockPointer, 4831 4832 /// IncompatibleBlockPointer - The assignment is between two block 4833 /// pointers types that are not compatible. 4834 IncompatibleBlockPointer, 4835 4836 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4837 /// id type and something else (that is incompatible with it). For example, 4838 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4839 IncompatibleObjCQualifiedId, 4840 4841 /// Incompatible - We reject this conversion outright, it is invalid to 4842 /// represent it in the AST. 4843 Incompatible 4844 }; 4845 4846 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4847 /// assignment conversion type specified by ConvTy. This returns true if the 4848 /// conversion was invalid or false if the conversion was accepted. 4849 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4850 SourceLocation Loc, 4851 QualType DstType, QualType SrcType, 4852 Expr *SrcExpr, AssignmentAction Action, 4853 bool *Complained = 0); 4854 4855 /// CheckAssignmentConstraints - Perform type checking for assignment, 4856 /// argument passing, variable initialization, and function return values. 4857 /// C99 6.5.16. 4858 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 4859 QualType lhs, QualType rhs); 4860 4861 /// Check assignment constraints and prepare for a conversion of the 4862 /// RHS to the LHS type. 4863 AssignConvertType CheckAssignmentConstraints(QualType lhs, Expr *&rhs, 4864 CastKind &Kind); 4865 4866 // CheckSingleAssignmentConstraints - Currently used by 4867 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4868 // this routine performs the default function/array converions. 4869 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4870 Expr *&rExpr); 4871 4872 // \brief If the lhs type is a transparent union, check whether we 4873 // can initialize the transparent union with the given expression. 4874 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4875 Expr *&rExpr); 4876 4877 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4878 4879 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4880 4881 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4882 AssignmentAction Action, 4883 bool AllowExplicit = false); 4884 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4885 AssignmentAction Action, 4886 bool AllowExplicit, 4887 ImplicitConversionSequence& ICS); 4888 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4889 const ImplicitConversionSequence& ICS, 4890 AssignmentAction Action, 4891 bool CStyle = false); 4892 bool PerformImplicitConversion(Expr *&From, QualType ToType, 4893 const StandardConversionSequence& SCS, 4894 AssignmentAction Action, 4895 bool CStyle); 4896 4897 /// the following "Check" methods will return a valid/converted QualType 4898 /// or a null QualType (indicating an error diagnostic was issued). 4899 4900 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4901 QualType InvalidOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4902 QualType CheckPointerToMemberOperands( // C++ 5.5 4903 Expr *&lex, Expr *&rex, ExprValueKind &VK, 4904 SourceLocation OpLoc, bool isIndirect); 4905 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4906 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign, 4907 bool isDivide); 4908 QualType CheckRemainderOperands( // C99 6.5.5 4909 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4910 QualType CheckAdditionOperands( // C99 6.5.6 4911 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4912 QualType CheckSubtractionOperands( // C99 6.5.6 4913 Expr *&lex, Expr *&rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4914 QualType CheckShiftOperands( // C99 6.5.7 4915 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4916 bool isCompAssign = false); 4917 QualType CheckCompareOperands( // C99 6.5.8/9 4918 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc, 4919 bool isRelational); 4920 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4921 Expr *&lex, Expr *&rex, SourceLocation OpLoc, bool isCompAssign = false); 4922 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4923 Expr *&lex, Expr *&rex, SourceLocation OpLoc, unsigned Opc); 4924 // CheckAssignmentOperands is used for both simple and compound assignment. 4925 // For simple assignment, pass both expressions and a null converted type. 4926 // For compound assignment, pass both expressions and the converted type. 4927 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4928 Expr *lex, Expr *&rex, SourceLocation OpLoc, QualType convertedType); 4929 4930 void ConvertPropertyForRValue(Expr *&E); 4931 void ConvertPropertyForLValue(Expr *&LHS, Expr *&RHS, QualType& LHSTy); 4932 4933 QualType CheckConditionalOperands( // C99 6.5.15 4934 Expr *&cond, Expr *&lhs, Expr *&rhs, 4935 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4936 QualType CXXCheckConditionalOperands( // C++ 5.16 4937 Expr *&cond, Expr *&lhs, Expr *&rhs, 4938 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4939 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4940 bool *NonStandardCompositeType = 0); 4941 4942 QualType FindCompositeObjCPointerType(Expr *&LHS, Expr *&RHS, 4943 SourceLocation questionLoc); 4944 4945 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 4946 SourceLocation QuestionLoc); 4947 4948 /// type checking for vector binary operators. 4949 QualType CheckVectorOperands(SourceLocation l, Expr *&lex, Expr *&rex); 4950 QualType CheckVectorCompareOperands(Expr *&lex, Expr *&rx, 4951 SourceLocation l, bool isRel); 4952 4953 /// type checking declaration initializers (C99 6.7.8) 4954 bool CheckInitList(const InitializedEntity &Entity, 4955 InitListExpr *&InitList, QualType &DeclType); 4956 bool CheckForConstantInitializer(Expr *e, QualType t); 4957 4958 // type checking C++ declaration initializers (C++ [dcl.init]). 4959 4960 /// ReferenceCompareResult - Expresses the result of comparing two 4961 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 4962 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 4963 enum ReferenceCompareResult { 4964 /// Ref_Incompatible - The two types are incompatible, so direct 4965 /// reference binding is not possible. 4966 Ref_Incompatible = 0, 4967 /// Ref_Related - The two types are reference-related, which means 4968 /// that their unqualified forms (T1 and T2) are either the same 4969 /// or T1 is a base class of T2. 4970 Ref_Related, 4971 /// Ref_Compatible_With_Added_Qualification - The two types are 4972 /// reference-compatible with added qualification, meaning that 4973 /// they are reference-compatible and the qualifiers on T1 (cv1) 4974 /// are greater than the qualifiers on T2 (cv2). 4975 Ref_Compatible_With_Added_Qualification, 4976 /// Ref_Compatible - The two types are reference-compatible and 4977 /// have equivalent qualifiers (cv1 == cv2). 4978 Ref_Compatible 4979 }; 4980 4981 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 4982 QualType T1, QualType T2, 4983 bool &DerivedToBase, 4984 bool &ObjCConversion); 4985 4986 /// CheckCastTypes - Check type constraints for casting between types under 4987 /// C semantics, or forward to CXXCheckCStyleCast in C++. 4988 bool CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *&CastExpr, 4989 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 4990 bool FunctionalStyle = false); 4991 4992 // CheckVectorCast - check type constraints for vectors. 4993 // Since vectors are an extension, there are no C standard reference for this. 4994 // We allow casting between vectors and integer datatypes of the same size. 4995 // returns true if the cast is invalid 4996 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 4997 CastKind &Kind); 4998 4999 // CheckExtVectorCast - check type constraints for extended vectors. 5000 // Since vectors are an extension, there are no C standard reference for this. 5001 // We allow casting between vectors and integer datatypes of the same size, 5002 // or vectors and the element type of that vector. 5003 // returns true if the cast is invalid 5004 bool CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *&CastExpr, 5005 CastKind &Kind); 5006 5007 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5008 /// cast under C++ semantics. 5009 bool CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5010 Expr *&CastExpr, CastKind &Kind, 5011 CXXCastPath &BasePath, bool FunctionalStyle); 5012 5013 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5014 /// \param Method - May be null. 5015 /// \param [out] ReturnType - The return type of the send. 5016 /// \return true iff there were any incompatible types. 5017 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5018 ObjCMethodDecl *Method, bool isClassMessage, 5019 SourceLocation lbrac, SourceLocation rbrac, 5020 QualType &ReturnType, ExprValueKind &VK); 5021 5022 /// CheckBooleanCondition - Diagnose problems involving the use of 5023 /// the given expression as a boolean condition (e.g. in an if 5024 /// statement). Also performs the standard function and array 5025 /// decays, possibly changing the input variable. 5026 /// 5027 /// \param Loc - A location associated with the condition, e.g. the 5028 /// 'if' keyword. 5029 /// \return true iff there were any errors 5030 bool CheckBooleanCondition(Expr *&CondExpr, SourceLocation Loc); 5031 5032 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5033 Expr *SubExpr); 5034 5035 /// DiagnoseAssignmentAsCondition - Given that an expression is 5036 /// being used as a boolean condition, warn if it's an assignment. 5037 void DiagnoseAssignmentAsCondition(Expr *E); 5038 5039 /// \brief Redundant parentheses over an equality comparison can indicate 5040 /// that the user intended an assignment used as condition. 5041 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5042 5043 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5044 bool CheckCXXBooleanCondition(Expr *&CondExpr); 5045 5046 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5047 /// the specified width and sign. If an overflow occurs, detect it and emit 5048 /// the specified diagnostic. 5049 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5050 unsigned NewWidth, bool NewSign, 5051 SourceLocation Loc, unsigned DiagID); 5052 5053 /// Checks that the Objective-C declaration is declared in the global scope. 5054 /// Emits an error and marks the declaration as invalid if it's not declared 5055 /// in the global scope. 5056 bool CheckObjCDeclScope(Decl *D); 5057 5058 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5059 /// and reports the appropriate diagnostics. Returns false on success. 5060 /// Can optionally return the value of the expression. 5061 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5062 5063 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5064 /// the correct width, and that the field type is valid. 5065 /// Returns false on success. 5066 /// Can optionally return whether the bit-field is of width 0 5067 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5068 QualType FieldTy, const Expr *BitWidth, 5069 bool *ZeroWidth = 0); 5070 5071 /// \name Code completion 5072 //@{ 5073 /// \brief Describes the context in which code completion occurs. 5074 enum ParserCompletionContext { 5075 /// \brief Code completion occurs at top-level or namespace context. 5076 PCC_Namespace, 5077 /// \brief Code completion occurs within a class, struct, or union. 5078 PCC_Class, 5079 /// \brief Code completion occurs within an Objective-C interface, protocol, 5080 /// or category. 5081 PCC_ObjCInterface, 5082 /// \brief Code completion occurs within an Objective-C implementation or 5083 /// category implementation 5084 PCC_ObjCImplementation, 5085 /// \brief Code completion occurs within the list of instance variables 5086 /// in an Objective-C interface, protocol, category, or implementation. 5087 PCC_ObjCInstanceVariableList, 5088 /// \brief Code completion occurs following one or more template 5089 /// headers. 5090 PCC_Template, 5091 /// \brief Code completion occurs following one or more template 5092 /// headers within a class. 5093 PCC_MemberTemplate, 5094 /// \brief Code completion occurs within an expression. 5095 PCC_Expression, 5096 /// \brief Code completion occurs within a statement, which may 5097 /// also be an expression or a declaration. 5098 PCC_Statement, 5099 /// \brief Code completion occurs at the beginning of the 5100 /// initialization statement (or expression) in a for loop. 5101 PCC_ForInit, 5102 /// \brief Code completion occurs within the condition of an if, 5103 /// while, switch, or for statement. 5104 PCC_Condition, 5105 /// \brief Code completion occurs within the body of a function on a 5106 /// recovery path, where we do not have a specific handle on our position 5107 /// in the grammar. 5108 PCC_RecoveryInFunction, 5109 /// \brief Code completion occurs where only a type is permitted. 5110 PCC_Type, 5111 /// \brief Code completion occurs in a parenthesized expression, which 5112 /// might also be a type cast. 5113 PCC_ParenthesizedExpression, 5114 /// \brief Code completion occurs within a sequence of declaration 5115 /// specifiers within a function, method, or block. 5116 PCC_LocalDeclarationSpecifiers 5117 }; 5118 5119 void CodeCompleteOrdinaryName(Scope *S, 5120 ParserCompletionContext CompletionContext); 5121 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5122 bool AllowNonIdentifiers, 5123 bool AllowNestedNameSpecifiers); 5124 5125 struct CodeCompleteExpressionData; 5126 void CodeCompleteExpression(Scope *S, 5127 const CodeCompleteExpressionData &Data); 5128 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5129 SourceLocation OpLoc, 5130 bool IsArrow); 5131 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5132 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5133 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5134 void CodeCompleteCase(Scope *S); 5135 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5136 void CodeCompleteInitializer(Scope *S, Decl *D); 5137 void CodeCompleteReturn(Scope *S); 5138 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5139 5140 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5141 bool EnteringContext); 5142 void CodeCompleteUsing(Scope *S); 5143 void CodeCompleteUsingDirective(Scope *S); 5144 void CodeCompleteNamespaceDecl(Scope *S); 5145 void CodeCompleteNamespaceAliasDecl(Scope *S); 5146 void CodeCompleteOperatorName(Scope *S); 5147 void CodeCompleteConstructorInitializer(Decl *Constructor, 5148 CXXCtorInitializer** Initializers, 5149 unsigned NumInitializers); 5150 5151 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5152 bool InInterface); 5153 void CodeCompleteObjCAtVisibility(Scope *S); 5154 void CodeCompleteObjCAtStatement(Scope *S); 5155 void CodeCompleteObjCAtExpression(Scope *S); 5156 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5157 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5158 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5159 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5160 bool IsParameter); 5161 void CodeCompleteObjCMessageReceiver(Scope *S); 5162 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5163 IdentifierInfo **SelIdents, 5164 unsigned NumSelIdents, 5165 bool AtArgumentExpression); 5166 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5167 IdentifierInfo **SelIdents, 5168 unsigned NumSelIdents, 5169 bool AtArgumentExpression, 5170 bool IsSuper = false); 5171 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5172 IdentifierInfo **SelIdents, 5173 unsigned NumSelIdents, 5174 bool AtArgumentExpression, 5175 ObjCInterfaceDecl *Super = 0); 5176 void CodeCompleteObjCForCollection(Scope *S, 5177 DeclGroupPtrTy IterationVar); 5178 void CodeCompleteObjCSelector(Scope *S, 5179 IdentifierInfo **SelIdents, 5180 unsigned NumSelIdents); 5181 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5182 unsigned NumProtocols); 5183 void CodeCompleteObjCProtocolDecl(Scope *S); 5184 void CodeCompleteObjCInterfaceDecl(Scope *S); 5185 void CodeCompleteObjCSuperclass(Scope *S, 5186 IdentifierInfo *ClassName, 5187 SourceLocation ClassNameLoc); 5188 void CodeCompleteObjCImplementationDecl(Scope *S); 5189 void CodeCompleteObjCInterfaceCategory(Scope *S, 5190 IdentifierInfo *ClassName, 5191 SourceLocation ClassNameLoc); 5192 void CodeCompleteObjCImplementationCategory(Scope *S, 5193 IdentifierInfo *ClassName, 5194 SourceLocation ClassNameLoc); 5195 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5196 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5197 IdentifierInfo *PropertyName, 5198 Decl *ObjCImpDecl); 5199 void CodeCompleteObjCMethodDecl(Scope *S, 5200 bool IsInstanceMethod, 5201 ParsedType ReturnType, 5202 Decl *IDecl); 5203 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5204 bool IsInstanceMethod, 5205 bool AtParameterName, 5206 ParsedType ReturnType, 5207 IdentifierInfo **SelIdents, 5208 unsigned NumSelIdents); 5209 void CodeCompletePreprocessorDirective(bool InConditional); 5210 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5211 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5212 void CodeCompletePreprocessorExpression(); 5213 void CodeCompletePreprocessorMacroArgument(Scope *S, 5214 IdentifierInfo *Macro, 5215 MacroInfo *MacroInfo, 5216 unsigned Argument); 5217 void CodeCompleteNaturalLanguage(); 5218 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5219 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5220 //@} 5221 5222 void PrintStats() const {} 5223 5224 //===--------------------------------------------------------------------===// 5225 // Extra semantic analysis beyond the C type system 5226 5227public: 5228 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5229 unsigned ByteNo) const; 5230 5231private: 5232 void CheckArrayAccess(const Expr *E); 5233 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5234 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5235 5236 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5237 bool CheckObjCString(Expr *Arg); 5238 5239 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5240 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5241 5242 bool SemaBuiltinVAStart(CallExpr *TheCall); 5243 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5244 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5245 5246public: 5247 // Used by C++ template instantiation. 5248 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5249 5250private: 5251 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5252 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5253 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5254 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5255 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5256 llvm::APSInt &Result); 5257 5258 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5259 bool HasVAListArg, unsigned format_idx, 5260 unsigned firstDataArg, bool isPrintf); 5261 5262 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5263 const CallExpr *TheCall, bool HasVAListArg, 5264 unsigned format_idx, unsigned firstDataArg, 5265 bool isPrintf); 5266 5267 void CheckNonNullArguments(const NonNullAttr *NonNull, 5268 const CallExpr *TheCall); 5269 5270 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5271 unsigned format_idx, unsigned firstDataArg, 5272 bool isPrintf); 5273 5274 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5275 SourceLocation ReturnLoc); 5276 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5277 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5278 5279 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5280 Expr *Init); 5281 5282 /// \brief The parser's current scope. 5283 /// 5284 /// The parser maintains this state here. 5285 Scope *CurScope; 5286 5287protected: 5288 friend class Parser; 5289 friend class InitializationSequence; 5290 5291 /// \brief Retrieve the parser's current scope. 5292 Scope *getCurScope() const { return CurScope; } 5293}; 5294 5295/// \brief RAII object that enters a new expression evaluation context. 5296class EnterExpressionEvaluationContext { 5297 Sema &Actions; 5298 5299public: 5300 EnterExpressionEvaluationContext(Sema &Actions, 5301 Sema::ExpressionEvaluationContext NewContext) 5302 : Actions(Actions) { 5303 Actions.PushExpressionEvaluationContext(NewContext); 5304 } 5305 5306 ~EnterExpressionEvaluationContext() { 5307 Actions.PopExpressionEvaluationContext(); 5308 } 5309}; 5310 5311} // end namespace clang 5312 5313#endif 5314