Sema.h revision ad762fcdc16b9e4705b12b09d92b8c026212b906
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/AST/Expr.h" 24#include "clang/AST/DeclarationName.h" 25#include "clang/AST/ExternalASTSource.h" 26#include "clang/AST/TypeLoc.h" 27#include "clang/Basic/Specifiers.h" 28#include "clang/Basic/TemplateKinds.h" 29#include "clang/Basic/TypeTraits.h" 30#include "llvm/ADT/OwningPtr.h" 31#include "llvm/ADT/SmallPtrSet.h" 32#include "llvm/ADT/SmallVector.h" 33#include <deque> 34#include <string> 35 36namespace llvm { 37 class APSInt; 38 template <typename ValueT> struct DenseMapInfo; 39 template <typename ValueT, typename ValueInfoT> class DenseSet; 40} 41 42namespace clang { 43 class ADLResult; 44 class ASTConsumer; 45 class ASTContext; 46 class ArrayType; 47 class AttributeList; 48 class BlockDecl; 49 class CXXBasePath; 50 class CXXBasePaths; 51 typedef llvm::SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 52 class CXXConstructorDecl; 53 class CXXConversionDecl; 54 class CXXDestructorDecl; 55 class CXXFieldCollector; 56 class CXXMemberCallExpr; 57 class CXXMethodDecl; 58 class CXXScopeSpec; 59 class CXXTemporary; 60 class CXXTryStmt; 61 class CallExpr; 62 class ClassTemplateDecl; 63 class ClassTemplatePartialSpecializationDecl; 64 class ClassTemplateSpecializationDecl; 65 class CodeCompleteConsumer; 66 class CodeCompletionAllocator; 67 class CodeCompletionResult; 68 class Decl; 69 class DeclAccessPair; 70 class DeclContext; 71 class DeclRefExpr; 72 class DeclaratorDecl; 73 class DeducedTemplateArgument; 74 class DependentDiagnostic; 75 class DesignatedInitExpr; 76 class Designation; 77 class EnumConstantDecl; 78 class Expr; 79 class ExtVectorType; 80 class ExternalSemaSource; 81 class FormatAttr; 82 class FriendDecl; 83 class FunctionDecl; 84 class FunctionProtoType; 85 class FunctionTemplateDecl; 86 class ImplicitConversionSequence; 87 class InitListExpr; 88 class InitializationKind; 89 class InitializationSequence; 90 class InitializedEntity; 91 class IntegerLiteral; 92 class LabelStmt; 93 class LangOptions; 94 class LocalInstantiationScope; 95 class LookupResult; 96 class MacroInfo; 97 class MultiLevelTemplateArgumentList; 98 class NamedDecl; 99 class NonNullAttr; 100 class ObjCCategoryDecl; 101 class ObjCCategoryImplDecl; 102 class ObjCCompatibleAliasDecl; 103 class ObjCContainerDecl; 104 class ObjCImplDecl; 105 class ObjCImplementationDecl; 106 class ObjCInterfaceDecl; 107 class ObjCIvarDecl; 108 template <class T> class ObjCList; 109 class ObjCMethodDecl; 110 class ObjCPropertyDecl; 111 class ObjCProtocolDecl; 112 class OverloadCandidateSet; 113 class ParenListExpr; 114 class ParmVarDecl; 115 class Preprocessor; 116 class PseudoDestructorTypeStorage; 117 class QualType; 118 class StandardConversionSequence; 119 class Stmt; 120 class StringLiteral; 121 class SwitchStmt; 122 class TargetAttributesSema; 123 class TemplateArgument; 124 class TemplateArgumentList; 125 class TemplateArgumentLoc; 126 class TemplateDecl; 127 class TemplateParameterList; 128 class TemplatePartialOrderingContext; 129 class TemplateTemplateParmDecl; 130 class Token; 131 class TypedefDecl; 132 class TypeLoc; 133 class UnqualifiedId; 134 class UnresolvedLookupExpr; 135 class UnresolvedMemberExpr; 136 class UnresolvedSetImpl; 137 class UnresolvedSetIterator; 138 class UsingDecl; 139 class UsingShadowDecl; 140 class ValueDecl; 141 class VarDecl; 142 class VisibilityAttr; 143 class VisibleDeclConsumer; 144 class IndirectFieldDecl; 145 146namespace sema { 147 class AccessedEntity; 148 class BlockScopeInfo; 149 class DelayedDiagnostic; 150 class FunctionScopeInfo; 151 class TemplateDeductionInfo; 152} 153 154/// \brief Holds a QualType and a TypeSourceInfo* that came out of a declarator 155/// parsing. 156/// 157/// LocInfoType is a "transient" type, only needed for passing to/from Parser 158/// and Sema, when we want to preserve type source info for a parsed type. 159/// It will not participate in the type system semantics in any way. 160class LocInfoType : public Type { 161 enum { 162 // The last number that can fit in Type's TC. 163 // Avoids conflict with an existing Type class. 164 LocInfo = Type::TypeLast + 1 165 }; 166 167 TypeSourceInfo *DeclInfo; 168 169 LocInfoType(QualType ty, TypeSourceInfo *TInfo) 170 : Type((TypeClass)LocInfo, ty, ty->isDependentType(), 171 ty->isVariablyModifiedType(), 172 ty->containsUnexpandedParameterPack()), 173 DeclInfo(TInfo) { 174 assert(getTypeClass() == (TypeClass)LocInfo && "LocInfo didn't fit in TC?"); 175 } 176 friend class Sema; 177 178public: 179 QualType getType() const { return getCanonicalTypeInternal(); } 180 TypeSourceInfo *getTypeSourceInfo() const { return DeclInfo; } 181 182 void getAsStringInternal(std::string &Str, 183 const PrintingPolicy &Policy) const; 184 185 static bool classof(const Type *T) { 186 return T->getTypeClass() == (TypeClass)LocInfo; 187 } 188 static bool classof(const LocInfoType *) { return true; } 189}; 190 191// FIXME: No way to easily map from TemplateTypeParmTypes to 192// TemplateTypeParmDecls, so we have this horrible PointerUnion. 193typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 194 SourceLocation> UnexpandedParameterPack; 195 196/// Sema - This implements semantic analysis and AST building for C. 197class Sema { 198 Sema(const Sema&); // DO NOT IMPLEMENT 199 void operator=(const Sema&); // DO NOT IMPLEMENT 200 mutable const TargetAttributesSema* TheTargetAttributesSema; 201public: 202 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 203 typedef OpaquePtr<TemplateName> TemplateTy; 204 typedef OpaquePtr<QualType> TypeTy; 205 typedef Attr AttrTy; 206 typedef CXXBaseSpecifier BaseTy; 207 typedef CXXCtorInitializer MemInitTy; 208 typedef Expr ExprTy; 209 typedef Stmt StmtTy; 210 typedef TemplateParameterList TemplateParamsTy; 211 typedef NestedNameSpecifier CXXScopeTy; 212 213 OpenCLOptions OpenCLFeatures; 214 FPOptions FPFeatures; 215 216 const LangOptions &LangOpts; 217 Preprocessor &PP; 218 ASTContext &Context; 219 ASTConsumer &Consumer; 220 Diagnostic &Diags; 221 SourceManager &SourceMgr; 222 223 /// \brief Source of additional semantic information. 224 ExternalSemaSource *ExternalSource; 225 226 /// \brief Code-completion consumer. 227 CodeCompleteConsumer *CodeCompleter; 228 229 /// CurContext - This is the current declaration context of parsing. 230 DeclContext *CurContext; 231 232 /// VAListTagName - The declaration name corresponding to __va_list_tag. 233 /// This is used as part of a hack to omit that class from ADL results. 234 DeclarationName VAListTagName; 235 236 /// PackContext - Manages the stack for #pragma pack. An alignment 237 /// of 0 indicates default alignment. 238 void *PackContext; // Really a "PragmaPackStack*" 239 240 /// VisContext - Manages the stack for #pragma GCC visibility. 241 void *VisContext; // Really a "PragmaVisStack*" 242 243 /// \brief Stack containing information about each of the nested 244 /// function, block, and method scopes that are currently active. 245 /// 246 /// This array is never empty. Clients should ignore the first 247 /// element, which is used to cache a single FunctionScopeInfo 248 /// that's used to parse every top-level function. 249 llvm::SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 250 251 /// ExprTemporaries - This is the stack of temporaries that are created by 252 /// the current full expression. 253 llvm::SmallVector<CXXTemporary*, 8> ExprTemporaries; 254 255 /// ExtVectorDecls - This is a list all the extended vector types. This allows 256 /// us to associate a raw vector type with one of the ext_vector type names. 257 /// This is only necessary for issuing pretty diagnostics. 258 llvm::SmallVector<TypedefDecl*, 24> ExtVectorDecls; 259 260 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 261 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 262 263 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 264 265 /// PureVirtualClassDiagSet - a set of class declarations which we have 266 /// emitted a list of pure virtual functions. Used to prevent emitting the 267 /// same list more than once. 268 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 269 270 /// ParsingInitForAutoVars - a set of declarations with auto types for which 271 /// we are currently parsing the initializer. 272 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 273 274 /// \brief A mapping from external names to the most recent 275 /// locally-scoped external declaration with that name. 276 /// 277 /// This map contains external declarations introduced in local 278 /// scoped, e.g., 279 /// 280 /// \code 281 /// void f() { 282 /// void foo(int, int); 283 /// } 284 /// \endcode 285 /// 286 /// Here, the name "foo" will be associated with the declaration on 287 /// "foo" within f. This name is not visible outside of 288 /// "f". However, we still find it in two cases: 289 /// 290 /// - If we are declaring another external with the name "foo", we 291 /// can find "foo" as a previous declaration, so that the types 292 /// of this external declaration can be checked for 293 /// compatibility. 294 /// 295 /// - If we would implicitly declare "foo" (e.g., due to a call to 296 /// "foo" in C when no prototype or definition is visible), then 297 /// we find this declaration of "foo" and complain that it is 298 /// not visible. 299 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 300 301 /// \brief All the tentative definitions encountered in the TU. 302 llvm::SmallVector<VarDecl *, 2> TentativeDefinitions; 303 304 /// \brief The set of file scoped decls seen so far that have not been used 305 /// and must warn if not used. Only contains the first declaration. 306 llvm::SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 307 308 class DelayedDiagnostics; 309 310 class ParsingDeclState { 311 unsigned SavedStackSize; 312 friend class Sema::DelayedDiagnostics; 313 }; 314 315 class ProcessingContextState { 316 unsigned SavedParsingDepth; 317 unsigned SavedActiveStackBase; 318 friend class Sema::DelayedDiagnostics; 319 }; 320 321 /// A class which encapsulates the logic for delaying diagnostics 322 /// during parsing and other processing. 323 class DelayedDiagnostics { 324 /// \brief The stack of diagnostics that were delayed due to being 325 /// produced during the parsing of a declaration. 326 sema::DelayedDiagnostic *Stack; 327 328 /// \brief The number of objects on the delayed-diagnostics stack. 329 unsigned StackSize; 330 331 /// \brief The current capacity of the delayed-diagnostics stack. 332 unsigned StackCapacity; 333 334 /// \brief The index of the first "active" delayed diagnostic in 335 /// the stack. When parsing class definitions, we ignore active 336 /// delayed diagnostics from the surrounding context. 337 unsigned ActiveStackBase; 338 339 /// \brief The depth of the declarations we're currently parsing. 340 /// This gets saved and reset whenever we enter a class definition. 341 unsigned ParsingDepth; 342 343 public: 344 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 345 ActiveStackBase(0), ParsingDepth(0) {} 346 347 ~DelayedDiagnostics() { 348 delete[] reinterpret_cast<char*>(Stack); 349 } 350 351 /// Adds a delayed diagnostic. 352 void add(const sema::DelayedDiagnostic &diag); 353 354 /// Determines whether diagnostics should be delayed. 355 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 356 357 /// Observe that we've started parsing a declaration. Access and 358 /// deprecation diagnostics will be delayed; when the declaration 359 /// is completed, all active delayed diagnostics will be evaluated 360 /// in its context, and then active diagnostics stack will be 361 /// popped down to the saved depth. 362 ParsingDeclState pushParsingDecl() { 363 ParsingDepth++; 364 365 ParsingDeclState state; 366 state.SavedStackSize = StackSize; 367 return state; 368 } 369 370 /// Observe that we're completed parsing a declaration. 371 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 372 373 /// Observe that we've started processing a different context, the 374 /// contents of which are semantically separate from the 375 /// declarations it may lexically appear in. This sets aside the 376 /// current stack of active diagnostics and starts afresh. 377 ProcessingContextState pushContext() { 378 assert(StackSize >= ActiveStackBase); 379 380 ProcessingContextState state; 381 state.SavedParsingDepth = ParsingDepth; 382 state.SavedActiveStackBase = ActiveStackBase; 383 384 ActiveStackBase = StackSize; 385 ParsingDepth = 0; 386 387 return state; 388 } 389 390 /// Observe that we've stopped processing a context. This 391 /// restores the previous stack of active diagnostics. 392 void popContext(ProcessingContextState state) { 393 assert(ActiveStackBase == StackSize); 394 assert(ParsingDepth == 0); 395 ActiveStackBase = state.SavedActiveStackBase; 396 ParsingDepth = state.SavedParsingDepth; 397 } 398 } DelayedDiagnostics; 399 400 /// A RAII object to temporarily push a declaration context. 401 class ContextRAII { 402 private: 403 Sema &S; 404 DeclContext *SavedContext; 405 ProcessingContextState SavedContextState; 406 407 public: 408 ContextRAII(Sema &S, DeclContext *ContextToPush) 409 : S(S), SavedContext(S.CurContext), 410 SavedContextState(S.DelayedDiagnostics.pushContext()) 411 { 412 assert(ContextToPush && "pushing null context"); 413 S.CurContext = ContextToPush; 414 } 415 416 void pop() { 417 if (!SavedContext) return; 418 S.CurContext = SavedContext; 419 S.DelayedDiagnostics.popContext(SavedContextState); 420 SavedContext = 0; 421 } 422 423 ~ContextRAII() { 424 pop(); 425 } 426 }; 427 428 /// WeakUndeclaredIdentifiers - Identifiers contained in 429 /// #pragma weak before declared. rare. may alias another 430 /// identifier, declared or undeclared 431 class WeakInfo { 432 IdentifierInfo *alias; // alias (optional) 433 SourceLocation loc; // for diagnostics 434 bool used; // identifier later declared? 435 public: 436 WeakInfo() 437 : alias(0), loc(SourceLocation()), used(false) {} 438 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 439 : alias(Alias), loc(Loc), used(false) {} 440 inline IdentifierInfo * getAlias() const { return alias; } 441 inline SourceLocation getLocation() const { return loc; } 442 void setUsed(bool Used=true) { used = Used; } 443 inline bool getUsed() { return used; } 444 bool operator==(WeakInfo RHS) const { 445 return alias == RHS.getAlias() && loc == RHS.getLocation(); 446 } 447 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 448 }; 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 452 /// #pragma weak during processing of other Decls. 453 /// I couldn't figure out a clean way to generate these in-line, so 454 /// we store them here and handle separately -- which is a hack. 455 /// It would be best to refactor this. 456 llvm::SmallVector<Decl*,2> WeakTopLevelDecl; 457 458 IdentifierResolver IdResolver; 459 460 /// Translation Unit Scope - useful to Objective-C actions that need 461 /// to lookup file scope declarations in the "ordinary" C decl namespace. 462 /// For example, user-defined classes, built-in "id" type, etc. 463 Scope *TUScope; 464 465 /// \brief The C++ "std" namespace, where the standard library resides. 466 LazyDeclPtr StdNamespace; 467 468 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 469 /// standard library. 470 LazyDeclPtr StdBadAlloc; 471 472 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 473 RecordDecl *CXXTypeInfoDecl; 474 475 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 476 RecordDecl *MSVCGuidDecl; 477 478 /// A flag to remember whether the implicit forms of operator new and delete 479 /// have been declared. 480 bool GlobalNewDeleteDeclared; 481 482 /// \brief The set of declarations that have been referenced within 483 /// a potentially evaluated expression. 484 typedef llvm::SmallVector<std::pair<SourceLocation, Decl *>, 10> 485 PotentiallyReferencedDecls; 486 487 /// \brief A set of diagnostics that may be emitted. 488 typedef llvm::SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 489 PotentiallyEmittedDiagnostics; 490 491 /// \brief Describes how the expressions currently being parsed are 492 /// evaluated at run-time, if at all. 493 enum ExpressionEvaluationContext { 494 /// \brief The current expression and its subexpressions occur within an 495 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 496 /// or the subexpression of \c sizeof, where the type or the value of the 497 /// expression may be significant but no code will be generated to evaluate 498 /// the value of the expression at run time. 499 Unevaluated, 500 501 /// \brief The current expression is potentially evaluated at run time, 502 /// which means that code may be generated to evaluate the value of the 503 /// expression at run time. 504 PotentiallyEvaluated, 505 506 /// \brief The current expression may be potentially evaluated or it may 507 /// be unevaluated, but it is impossible to tell from the lexical context. 508 /// This evaluation context is used primary for the operand of the C++ 509 /// \c typeid expression, whose argument is potentially evaluated only when 510 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 511 PotentiallyPotentiallyEvaluated, 512 513 /// \brief The current expression is potentially evaluated, but any 514 /// declarations referenced inside that expression are only used if 515 /// in fact the current expression is used. 516 /// 517 /// This value is used when parsing default function arguments, for which 518 /// we would like to provide diagnostics (e.g., passing non-POD arguments 519 /// through varargs) but do not want to mark declarations as "referenced" 520 /// until the default argument is used. 521 PotentiallyEvaluatedIfUsed 522 }; 523 524 /// \brief Data structure used to record current or nested 525 /// expression evaluation contexts. 526 struct ExpressionEvaluationContextRecord { 527 /// \brief The expression evaluation context. 528 ExpressionEvaluationContext Context; 529 530 /// \brief The number of temporaries that were active when we 531 /// entered this expression evaluation context. 532 unsigned NumTemporaries; 533 534 /// \brief The set of declarations referenced within a 535 /// potentially potentially-evaluated context. 536 /// 537 /// When leaving a potentially potentially-evaluated context, each 538 /// of these elements will be as referenced if the corresponding 539 /// potentially potentially evaluated expression is potentially 540 /// evaluated. 541 PotentiallyReferencedDecls *PotentiallyReferenced; 542 543 /// \brief The set of diagnostics to emit should this potentially 544 /// potentially-evaluated context become evaluated. 545 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 546 547 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 548 unsigned NumTemporaries) 549 : Context(Context), NumTemporaries(NumTemporaries), 550 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 551 552 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 553 if (!PotentiallyReferenced) 554 PotentiallyReferenced = new PotentiallyReferencedDecls; 555 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 556 } 557 558 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 559 if (!PotentiallyDiagnosed) 560 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 561 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 562 } 563 564 void Destroy() { 565 delete PotentiallyReferenced; 566 delete PotentiallyDiagnosed; 567 PotentiallyReferenced = 0; 568 PotentiallyDiagnosed = 0; 569 } 570 }; 571 572 /// A stack of expression evaluation contexts. 573 llvm::SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 574 575 /// \brief Whether the code handled by Sema should be considered a 576 /// complete translation unit or not. 577 /// 578 /// When true (which is generally the case), Sema will perform 579 /// end-of-translation-unit semantic tasks (such as creating 580 /// initializers for tentative definitions in C) once parsing has 581 /// completed. This flag will be false when building PCH files, 582 /// since a PCH file is by definition not a complete translation 583 /// unit. 584 bool CompleteTranslationUnit; 585 586 llvm::BumpPtrAllocator BumpAlloc; 587 588 /// \brief The number of SFINAE diagnostics that have been trapped. 589 unsigned NumSFINAEErrors; 590 591 typedef llvm::DenseMap<ParmVarDecl *, llvm::SmallVector<ParmVarDecl *, 1> > 592 UnparsedDefaultArgInstantiationsMap; 593 594 /// \brief A mapping from parameters with unparsed default arguments to the 595 /// set of instantiations of each parameter. 596 /// 597 /// This mapping is a temporary data structure used when parsing 598 /// nested class templates or nested classes of class templates, 599 /// where we might end up instantiating an inner class before the 600 /// default arguments of its methods have been parsed. 601 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 602 603 // Contains the locations of the beginning of unparsed default 604 // argument locations. 605 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 606 607 /// UndefinedInternals - all the used, undefined objects with 608 /// internal linkage in this translation unit. 609 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 610 611 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 612 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 613 614 /// Method Pool - allows efficient lookup when typechecking messages to "id". 615 /// We need to maintain a list, since selectors can have differing signatures 616 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 617 /// of selectors are "overloaded"). 618 GlobalMethodPool MethodPool; 619 620 /// Method selectors used in a @selector expression. Used for implementation 621 /// of -Wselector. 622 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 623 624 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 625 626 /// Private Helper predicate to check for 'self'. 627 bool isSelfExpr(Expr *RExpr); 628public: 629 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 630 bool CompleteTranslationUnit = true, 631 CodeCompleteConsumer *CompletionConsumer = 0); 632 ~Sema(); 633 634 /// \brief Perform initialization that occurs after the parser has been 635 /// initialized but before it parses anything. 636 void Initialize(); 637 638 const LangOptions &getLangOptions() const { return LangOpts; } 639 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 640 FPOptions &getFPOptions() { return FPFeatures; } 641 642 Diagnostic &getDiagnostics() const { return Diags; } 643 SourceManager &getSourceManager() const { return SourceMgr; } 644 const TargetAttributesSema &getTargetAttributesSema() const; 645 Preprocessor &getPreprocessor() const { return PP; } 646 ASTContext &getASTContext() const { return Context; } 647 ASTConsumer &getASTConsumer() const { return Consumer; } 648 649 /// \brief Helper class that creates diagnostics with optional 650 /// template instantiation stacks. 651 /// 652 /// This class provides a wrapper around the basic DiagnosticBuilder 653 /// class that emits diagnostics. SemaDiagnosticBuilder is 654 /// responsible for emitting the diagnostic (as DiagnosticBuilder 655 /// does) and, if the diagnostic comes from inside a template 656 /// instantiation, printing the template instantiation stack as 657 /// well. 658 class SemaDiagnosticBuilder : public DiagnosticBuilder { 659 Sema &SemaRef; 660 unsigned DiagID; 661 662 public: 663 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 664 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 665 666 explicit SemaDiagnosticBuilder(Sema &SemaRef) 667 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 668 669 ~SemaDiagnosticBuilder(); 670 }; 671 672 /// \brief Emit a diagnostic. 673 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 674 675 /// \brief Emit a partial diagnostic. 676 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 677 678 /// \brief Build a partial diagnostic. 679 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 680 681 bool findMacroSpelling(SourceLocation &loc, llvm::StringRef name); 682 683 ExprResult Owned(Expr* E) { return E; } 684 ExprResult Owned(ExprResult R) { return R; } 685 StmtResult Owned(Stmt* S) { return S; } 686 687 void ActOnEndOfTranslationUnit(); 688 689 Scope *getScopeForContext(DeclContext *Ctx); 690 691 void PushFunctionScope(); 692 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 693 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 694 const Decl *D = 0, const BlockExpr *blkExpr = 0); 695 696 sema::FunctionScopeInfo *getCurFunction() const { 697 return FunctionScopes.back(); 698 } 699 700 bool hasAnyErrorsInThisFunction() const; 701 702 /// \brief Retrieve the current block, if any. 703 sema::BlockScopeInfo *getCurBlock(); 704 705 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 706 llvm::SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 707 708 //===--------------------------------------------------------------------===// 709 // Type Analysis / Processing: SemaType.cpp. 710 // 711 712 QualType adjustParameterType(QualType T); 713 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 714 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 715 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 716 } 717 QualType BuildPointerType(QualType T, 718 SourceLocation Loc, DeclarationName Entity); 719 QualType BuildReferenceType(QualType T, bool LValueRef, 720 SourceLocation Loc, DeclarationName Entity); 721 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 722 Expr *ArraySize, unsigned Quals, 723 SourceRange Brackets, DeclarationName Entity); 724 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 725 SourceLocation AttrLoc); 726 QualType BuildFunctionType(QualType T, 727 QualType *ParamTypes, unsigned NumParamTypes, 728 bool Variadic, unsigned Quals, 729 RefQualifierKind RefQualifier, 730 SourceLocation Loc, DeclarationName Entity, 731 FunctionType::ExtInfo Info); 732 QualType BuildMemberPointerType(QualType T, QualType Class, 733 SourceLocation Loc, 734 DeclarationName Entity); 735 QualType BuildBlockPointerType(QualType T, 736 SourceLocation Loc, DeclarationName Entity); 737 QualType BuildParenType(QualType T); 738 739 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S, 740 TagDecl **OwnedDecl = 0, 741 bool AllowAutoInTypeName = false); 742 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 743 TypeSourceInfo *ReturnTypeInfo); 744 /// \brief Package the given type and TSI into a ParsedType. 745 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 746 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 747 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 748 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 749 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 750 bool CheckDistantExceptionSpec(QualType T); 751 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 752 bool CheckEquivalentExceptionSpec( 753 const FunctionProtoType *Old, SourceLocation OldLoc, 754 const FunctionProtoType *New, SourceLocation NewLoc); 755 bool CheckEquivalentExceptionSpec( 756 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 757 const FunctionProtoType *Old, SourceLocation OldLoc, 758 const FunctionProtoType *New, SourceLocation NewLoc, 759 bool *MissingExceptionSpecification = 0, 760 bool *MissingEmptyExceptionSpecification = 0, 761 bool AllowNoexceptAllMatchWithNoSpec = false, 762 bool IsOperatorNew = false); 763 bool CheckExceptionSpecSubset( 764 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 765 const FunctionProtoType *Superset, SourceLocation SuperLoc, 766 const FunctionProtoType *Subset, SourceLocation SubLoc); 767 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 768 const FunctionProtoType *Target, SourceLocation TargetLoc, 769 const FunctionProtoType *Source, SourceLocation SourceLoc); 770 771 TypeResult ActOnTypeName(Scope *S, Declarator &D); 772 773 bool RequireCompleteType(SourceLocation Loc, QualType T, 774 const PartialDiagnostic &PD, 775 std::pair<SourceLocation, PartialDiagnostic> Note); 776 bool RequireCompleteType(SourceLocation Loc, QualType T, 777 const PartialDiagnostic &PD); 778 bool RequireCompleteType(SourceLocation Loc, QualType T, 779 unsigned DiagID); 780 781 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 782 const CXXScopeSpec &SS, QualType T); 783 784 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 785 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 786 787 //===--------------------------------------------------------------------===// 788 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 789 // 790 791 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr); 792 793 void DiagnoseUseOfUnimplementedSelectors(); 794 795 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 796 Scope *S, CXXScopeSpec *SS = 0, 797 bool isClassName = false, 798 bool HasTrailingDot = false, 799 ParsedType ObjectType = ParsedType(), 800 bool WantNontrivialTypeSourceInfo = false); 801 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 802 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 803 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 804 SourceLocation IILoc, 805 Scope *S, 806 CXXScopeSpec *SS, 807 ParsedType &SuggestedType); 808 809 Decl *ActOnDeclarator(Scope *S, Declarator &D); 810 811 Decl *HandleDeclarator(Scope *S, Declarator &D, 812 MultiTemplateParamsArg TemplateParameterLists, 813 bool IsFunctionDefinition); 814 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 815 const LookupResult &Previous, 816 Scope *S); 817 void DiagnoseFunctionSpecifiers(Declarator& D); 818 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 819 void CheckShadow(Scope *S, VarDecl *D); 820 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 821 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 822 QualType R, TypeSourceInfo *TInfo, 823 LookupResult &Previous, bool &Redeclaration); 824 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 825 QualType R, TypeSourceInfo *TInfo, 826 LookupResult &Previous, 827 MultiTemplateParamsArg TemplateParamLists, 828 bool &Redeclaration); 829 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 830 bool &Redeclaration); 831 void CheckCompleteVariableDeclaration(VarDecl *var); 832 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 833 QualType R, TypeSourceInfo *TInfo, 834 LookupResult &Previous, 835 MultiTemplateParamsArg TemplateParamLists, 836 bool IsFunctionDefinition, 837 bool &Redeclaration); 838 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 839 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 840 void CheckFunctionDeclaration(Scope *S, 841 FunctionDecl *NewFD, LookupResult &Previous, 842 bool IsExplicitSpecialization, 843 bool &Redeclaration); 844 void CheckMain(FunctionDecl *FD); 845 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 846 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 847 SourceLocation Loc, 848 QualType T); 849 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 850 SourceLocation NameLoc, IdentifierInfo *Name, 851 QualType T, TypeSourceInfo *TSInfo, 852 StorageClass SC, StorageClass SCAsWritten); 853 void ActOnParamDefaultArgument(Decl *param, 854 SourceLocation EqualLoc, 855 Expr *defarg); 856 void ActOnParamUnparsedDefaultArgument(Decl *param, 857 SourceLocation EqualLoc, 858 SourceLocation ArgLoc); 859 void ActOnParamDefaultArgumentError(Decl *param); 860 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 861 SourceLocation EqualLoc); 862 863 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 864 bool TypeMayContainAuto); 865 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 866 void ActOnInitializerError(Decl *Dcl); 867 void ActOnCXXForRangeDecl(Decl *D); 868 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 869 void FinalizeDeclaration(Decl *D); 870 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 871 Decl **Group, 872 unsigned NumDecls); 873 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 874 bool TypeMayContainAuto = true); 875 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 876 SourceLocation LocAfterDecls); 877 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 878 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 879 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 880 881 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 882 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 883 884 /// \brief Diagnose any unused parameters in the given sequence of 885 /// ParmVarDecl pointers. 886 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 887 ParmVarDecl * const *End); 888 889 /// \brief Diagnose whether the size of parameters or return value of a 890 /// function or obj-c method definition is pass-by-value and larger than a 891 /// specified threshold. 892 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 893 ParmVarDecl * const *End, 894 QualType ReturnTy, 895 NamedDecl *D); 896 897 void DiagnoseInvalidJumps(Stmt *Body); 898 Decl *ActOnFileScopeAsmDecl(Expr *expr, 899 SourceLocation AsmLoc, 900 SourceLocation RParenLoc); 901 902 /// Scope actions. 903 void ActOnPopScope(SourceLocation Loc, Scope *S); 904 void ActOnTranslationUnitScope(Scope *S); 905 906 /// ParsedFreeStandingDeclSpec - This method is invoked when a declspec with 907 /// no declarator (e.g. "struct foo;") is parsed. 908 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 909 DeclSpec &DS); 910 911 StmtResult ActOnVlaStmt(const DeclSpec &DS); 912 913 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 914 AccessSpecifier AS, 915 RecordDecl *Record); 916 917 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 918 RecordDecl *Record); 919 920 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 921 TagTypeKind NewTag, 922 SourceLocation NewTagLoc, 923 const IdentifierInfo &Name); 924 925 enum TagUseKind { 926 TUK_Reference, // Reference to a tag: 'struct foo *X;' 927 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 928 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 929 TUK_Friend // Friend declaration: 'friend struct foo;' 930 }; 931 932 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 933 SourceLocation KWLoc, CXXScopeSpec &SS, 934 IdentifierInfo *Name, SourceLocation NameLoc, 935 AttributeList *Attr, AccessSpecifier AS, 936 MultiTemplateParamsArg TemplateParameterLists, 937 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 938 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 939 940 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 941 unsigned TagSpec, SourceLocation TagLoc, 942 CXXScopeSpec &SS, 943 IdentifierInfo *Name, SourceLocation NameLoc, 944 AttributeList *Attr, 945 MultiTemplateParamsArg TempParamLists); 946 947 TypeResult ActOnDependentTag(Scope *S, 948 unsigned TagSpec, 949 TagUseKind TUK, 950 const CXXScopeSpec &SS, 951 IdentifierInfo *Name, 952 SourceLocation TagLoc, 953 SourceLocation NameLoc); 954 955 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 956 IdentifierInfo *ClassName, 957 llvm::SmallVectorImpl<Decl *> &Decls); 958 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 959 Declarator &D, Expr *BitfieldWidth); 960 961 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 962 Declarator &D, Expr *BitfieldWidth, 963 AccessSpecifier AS); 964 965 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 966 TypeSourceInfo *TInfo, 967 RecordDecl *Record, SourceLocation Loc, 968 bool Mutable, Expr *BitfieldWidth, 969 SourceLocation TSSL, 970 AccessSpecifier AS, NamedDecl *PrevDecl, 971 Declarator *D = 0); 972 973 enum CXXSpecialMember { 974 CXXInvalid = -1, 975 CXXConstructor = 0, 976 CXXCopyConstructor = 1, 977 CXXCopyAssignment = 2, 978 CXXDestructor = 3 979 }; 980 bool CheckNontrivialField(FieldDecl *FD); 981 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 982 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 983 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 984 llvm::SmallVectorImpl<Decl *> &AllIvarDecls); 985 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 986 Declarator &D, Expr *BitfieldWidth, 987 tok::ObjCKeywordKind visibility); 988 989 // This is used for both record definitions and ObjC interface declarations. 990 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 991 Decl **Fields, unsigned NumFields, 992 SourceLocation LBrac, SourceLocation RBrac, 993 AttributeList *AttrList); 994 995 /// ActOnTagStartDefinition - Invoked when we have entered the 996 /// scope of a tag's definition (e.g., for an enumeration, class, 997 /// struct, or union). 998 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 999 1000 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1001 /// C++ record definition's base-specifiers clause and are starting its 1002 /// member declarations. 1003 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1004 SourceLocation FinalLoc, 1005 SourceLocation LBraceLoc); 1006 1007 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1008 /// the definition of a tag (enumeration, class, struct, or union). 1009 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1010 SourceLocation RBraceLoc); 1011 1012 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1013 /// error parsing the definition of a tag. 1014 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1015 1016 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1017 EnumConstantDecl *LastEnumConst, 1018 SourceLocation IdLoc, 1019 IdentifierInfo *Id, 1020 Expr *val); 1021 1022 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1023 SourceLocation IdLoc, IdentifierInfo *Id, 1024 AttributeList *Attrs, 1025 SourceLocation EqualLoc, Expr *Val); 1026 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1027 SourceLocation RBraceLoc, Decl *EnumDecl, 1028 Decl **Elements, unsigned NumElements, 1029 Scope *S, AttributeList *Attr); 1030 1031 DeclContext *getContainingDC(DeclContext *DC); 1032 1033 /// Set the current declaration context until it gets popped. 1034 void PushDeclContext(Scope *S, DeclContext *DC); 1035 void PopDeclContext(); 1036 1037 /// EnterDeclaratorContext - Used when we must lookup names in the context 1038 /// of a declarator's nested name specifier. 1039 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1040 void ExitDeclaratorContext(Scope *S); 1041 1042 DeclContext *getFunctionLevelDeclContext(); 1043 1044 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1045 /// to the function decl for the function being parsed. If we're currently 1046 /// in a 'block', this returns the containing context. 1047 FunctionDecl *getCurFunctionDecl(); 1048 1049 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1050 /// the method decl for the method being parsed. If we're currently 1051 /// in a 'block', this returns the containing context. 1052 ObjCMethodDecl *getCurMethodDecl(); 1053 1054 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1055 /// or C function we're in, otherwise return null. If we're currently 1056 /// in a 'block', this returns the containing context. 1057 NamedDecl *getCurFunctionOrMethodDecl(); 1058 1059 /// Add this decl to the scope shadowed decl chains. 1060 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1061 1062 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1063 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1064 /// true if 'D' belongs to the given declaration context. 1065 /// 1066 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1067 /// whether the declaration is in scope for the purposes of explicit template 1068 /// instantiation or specialization. The default is false. 1069 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1070 bool ExplicitInstantiationOrSpecialization = false); 1071 1072 /// Finds the scope corresponding to the given decl context, if it 1073 /// happens to be an enclosing scope. Otherwise return NULL. 1074 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1075 1076 /// Subroutines of ActOnDeclarator(). 1077 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1078 TypeSourceInfo *TInfo); 1079 void MergeTypeDefDecl(TypedefDecl *New, LookupResult &OldDecls); 1080 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1081 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1082 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1083 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1084 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1085 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1086 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1087 1088 // AssignmentAction - This is used by all the assignment diagnostic functions 1089 // to represent what is actually causing the operation 1090 enum AssignmentAction { 1091 AA_Assigning, 1092 AA_Passing, 1093 AA_Returning, 1094 AA_Converting, 1095 AA_Initializing, 1096 AA_Sending, 1097 AA_Casting 1098 }; 1099 1100 /// C++ Overloading. 1101 enum OverloadKind { 1102 /// This is a legitimate overload: the existing declarations are 1103 /// functions or function templates with different signatures. 1104 Ovl_Overload, 1105 1106 /// This is not an overload because the signature exactly matches 1107 /// an existing declaration. 1108 Ovl_Match, 1109 1110 /// This is not an overload because the lookup results contain a 1111 /// non-function. 1112 Ovl_NonFunction 1113 }; 1114 OverloadKind CheckOverload(Scope *S, 1115 FunctionDecl *New, 1116 const LookupResult &OldDecls, 1117 NamedDecl *&OldDecl, 1118 bool IsForUsingDecl); 1119 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1120 1121 bool TryImplicitConversion(InitializationSequence &Sequence, 1122 const InitializedEntity &Entity, 1123 Expr *From, 1124 bool SuppressUserConversions, 1125 bool AllowExplicit, 1126 bool InOverloadResolution, 1127 bool CStyle); 1128 1129 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1130 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1131 bool IsComplexPromotion(QualType FromType, QualType ToType); 1132 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1133 bool InOverloadResolution, 1134 QualType& ConvertedType, bool &IncompatibleObjC); 1135 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1136 QualType& ConvertedType, bool &IncompatibleObjC); 1137 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1138 QualType& ConvertedType); 1139 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1140 const FunctionProtoType *NewType); 1141 1142 bool CheckPointerConversion(Expr *From, QualType ToType, 1143 CastKind &Kind, 1144 CXXCastPath& BasePath, 1145 bool IgnoreBaseAccess); 1146 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1147 bool InOverloadResolution, 1148 QualType &ConvertedType); 1149 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1150 CastKind &Kind, 1151 CXXCastPath &BasePath, 1152 bool IgnoreBaseAccess); 1153 bool IsQualificationConversion(QualType FromType, QualType ToType, 1154 bool CStyle); 1155 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1156 1157 1158 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1159 const VarDecl *NRVOCandidate, 1160 QualType ResultType, 1161 Expr *Value); 1162 1163 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1164 SourceLocation EqualLoc, 1165 ExprResult Init); 1166 ExprResult PerformObjectArgumentInitialization(Expr *From, 1167 NestedNameSpecifier *Qualifier, 1168 NamedDecl *FoundDecl, 1169 CXXMethodDecl *Method); 1170 1171 ExprResult PerformContextuallyConvertToBool(Expr *From); 1172 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1173 1174 ExprResult 1175 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1176 const PartialDiagnostic &NotIntDiag, 1177 const PartialDiagnostic &IncompleteDiag, 1178 const PartialDiagnostic &ExplicitConvDiag, 1179 const PartialDiagnostic &ExplicitConvNote, 1180 const PartialDiagnostic &AmbigDiag, 1181 const PartialDiagnostic &AmbigNote, 1182 const PartialDiagnostic &ConvDiag); 1183 1184 ExprResult PerformObjectMemberConversion(Expr *From, 1185 NestedNameSpecifier *Qualifier, 1186 NamedDecl *FoundDecl, 1187 NamedDecl *Member); 1188 1189 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1190 // TODO: make this is a typesafe union. 1191 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1192 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1193 1194 void AddOverloadCandidate(NamedDecl *Function, 1195 DeclAccessPair FoundDecl, 1196 Expr **Args, unsigned NumArgs, 1197 OverloadCandidateSet &CandidateSet); 1198 1199 void AddOverloadCandidate(FunctionDecl *Function, 1200 DeclAccessPair FoundDecl, 1201 Expr **Args, unsigned NumArgs, 1202 OverloadCandidateSet& CandidateSet, 1203 bool SuppressUserConversions = false, 1204 bool PartialOverloading = false); 1205 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1206 Expr **Args, unsigned NumArgs, 1207 OverloadCandidateSet& CandidateSet, 1208 bool SuppressUserConversions = false); 1209 void AddMethodCandidate(DeclAccessPair FoundDecl, 1210 QualType ObjectType, 1211 Expr::Classification ObjectClassification, 1212 Expr **Args, unsigned NumArgs, 1213 OverloadCandidateSet& CandidateSet, 1214 bool SuppressUserConversion = false); 1215 void AddMethodCandidate(CXXMethodDecl *Method, 1216 DeclAccessPair FoundDecl, 1217 CXXRecordDecl *ActingContext, QualType ObjectType, 1218 Expr::Classification ObjectClassification, 1219 Expr **Args, unsigned NumArgs, 1220 OverloadCandidateSet& CandidateSet, 1221 bool SuppressUserConversions = false); 1222 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1223 DeclAccessPair FoundDecl, 1224 CXXRecordDecl *ActingContext, 1225 TemplateArgumentListInfo *ExplicitTemplateArgs, 1226 QualType ObjectType, 1227 Expr::Classification ObjectClassification, 1228 Expr **Args, unsigned NumArgs, 1229 OverloadCandidateSet& CandidateSet, 1230 bool SuppressUserConversions = false); 1231 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1232 DeclAccessPair FoundDecl, 1233 TemplateArgumentListInfo *ExplicitTemplateArgs, 1234 Expr **Args, unsigned NumArgs, 1235 OverloadCandidateSet& CandidateSet, 1236 bool SuppressUserConversions = false); 1237 void AddConversionCandidate(CXXConversionDecl *Conversion, 1238 DeclAccessPair FoundDecl, 1239 CXXRecordDecl *ActingContext, 1240 Expr *From, QualType ToType, 1241 OverloadCandidateSet& CandidateSet); 1242 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1243 DeclAccessPair FoundDecl, 1244 CXXRecordDecl *ActingContext, 1245 Expr *From, QualType ToType, 1246 OverloadCandidateSet &CandidateSet); 1247 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1248 DeclAccessPair FoundDecl, 1249 CXXRecordDecl *ActingContext, 1250 const FunctionProtoType *Proto, 1251 Expr *Object, Expr **Args, unsigned NumArgs, 1252 OverloadCandidateSet& CandidateSet); 1253 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1254 SourceLocation OpLoc, 1255 Expr **Args, unsigned NumArgs, 1256 OverloadCandidateSet& CandidateSet, 1257 SourceRange OpRange = SourceRange()); 1258 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1259 Expr **Args, unsigned NumArgs, 1260 OverloadCandidateSet& CandidateSet, 1261 bool IsAssignmentOperator = false, 1262 unsigned NumContextualBoolArguments = 0); 1263 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1264 SourceLocation OpLoc, 1265 Expr **Args, unsigned NumArgs, 1266 OverloadCandidateSet& CandidateSet); 1267 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1268 bool Operator, 1269 Expr **Args, unsigned NumArgs, 1270 TemplateArgumentListInfo *ExplicitTemplateArgs, 1271 OverloadCandidateSet& CandidateSet, 1272 bool PartialOverloading = false, 1273 bool StdNamespaceIsAssociated = false); 1274 1275 // Emit as a 'note' the specific overload candidate 1276 void NoteOverloadCandidate(FunctionDecl *Fn); 1277 1278 // Emit as a series of 'note's all template and non-templates 1279 // identified by the expression Expr 1280 void NoteAllOverloadCandidates(Expr* E); 1281 1282 // [PossiblyAFunctionType] --> [Return] 1283 // NonFunctionType --> NonFunctionType 1284 // R (A) --> R(A) 1285 // R (*)(A) --> R (A) 1286 // R (&)(A) --> R (A) 1287 // R (S::*)(A) --> R (A) 1288 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1289 1290 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1291 bool Complain, 1292 DeclAccessPair &Found); 1293 1294 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(Expr *From, 1295 bool Complain = false, 1296 DeclAccessPair* Found = 0); 1297 1298 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1299 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1300 bool Complain = false, 1301 const SourceRange& OpRangeForComplaining = SourceRange(), 1302 QualType DestTypeForComplaining = QualType(), 1303 unsigned DiagIDForComplaining = 0); 1304 1305 1306 Expr *FixOverloadedFunctionReference(Expr *E, 1307 DeclAccessPair FoundDecl, 1308 FunctionDecl *Fn); 1309 ExprResult FixOverloadedFunctionReference(ExprResult, 1310 DeclAccessPair FoundDecl, 1311 FunctionDecl *Fn); 1312 1313 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1314 Expr **Args, unsigned NumArgs, 1315 OverloadCandidateSet &CandidateSet, 1316 bool PartialOverloading = false); 1317 1318 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1319 UnresolvedLookupExpr *ULE, 1320 SourceLocation LParenLoc, 1321 Expr **Args, unsigned NumArgs, 1322 SourceLocation RParenLoc, 1323 Expr *ExecConfig); 1324 1325 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1326 unsigned Opc, 1327 const UnresolvedSetImpl &Fns, 1328 Expr *input); 1329 1330 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1331 unsigned Opc, 1332 const UnresolvedSetImpl &Fns, 1333 Expr *LHS, Expr *RHS); 1334 1335 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1336 SourceLocation RLoc, 1337 Expr *Base,Expr *Idx); 1338 1339 ExprResult 1340 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1341 SourceLocation LParenLoc, Expr **Args, 1342 unsigned NumArgs, SourceLocation RParenLoc); 1343 ExprResult 1344 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1345 Expr **Args, unsigned NumArgs, 1346 SourceLocation RParenLoc); 1347 1348 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1349 SourceLocation OpLoc); 1350 1351 /// CheckCallReturnType - Checks that a call expression's return type is 1352 /// complete. Returns true on failure. The location passed in is the location 1353 /// that best represents the call. 1354 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1355 CallExpr *CE, FunctionDecl *FD); 1356 1357 /// Helpers for dealing with blocks and functions. 1358 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1359 bool CheckParameterNames); 1360 void CheckCXXDefaultArguments(FunctionDecl *FD); 1361 void CheckExtraCXXDefaultArguments(Declarator &D); 1362 Scope *getNonFieldDeclScope(Scope *S); 1363 1364 /// \name Name lookup 1365 /// 1366 /// These routines provide name lookup that is used during semantic 1367 /// analysis to resolve the various kinds of names (identifiers, 1368 /// overloaded operator names, constructor names, etc.) into zero or 1369 /// more declarations within a particular scope. The major entry 1370 /// points are LookupName, which performs unqualified name lookup, 1371 /// and LookupQualifiedName, which performs qualified name lookup. 1372 /// 1373 /// All name lookup is performed based on some specific criteria, 1374 /// which specify what names will be visible to name lookup and how 1375 /// far name lookup should work. These criteria are important both 1376 /// for capturing language semantics (certain lookups will ignore 1377 /// certain names, for example) and for performance, since name 1378 /// lookup is often a bottleneck in the compilation of C++. Name 1379 /// lookup criteria is specified via the LookupCriteria enumeration. 1380 /// 1381 /// The results of name lookup can vary based on the kind of name 1382 /// lookup performed, the current language, and the translation 1383 /// unit. In C, for example, name lookup will either return nothing 1384 /// (no entity found) or a single declaration. In C++, name lookup 1385 /// can additionally refer to a set of overloaded functions or 1386 /// result in an ambiguity. All of the possible results of name 1387 /// lookup are captured by the LookupResult class, which provides 1388 /// the ability to distinguish among them. 1389 //@{ 1390 1391 /// @brief Describes the kind of name lookup to perform. 1392 enum LookupNameKind { 1393 /// Ordinary name lookup, which finds ordinary names (functions, 1394 /// variables, typedefs, etc.) in C and most kinds of names 1395 /// (functions, variables, members, types, etc.) in C++. 1396 LookupOrdinaryName = 0, 1397 /// Tag name lookup, which finds the names of enums, classes, 1398 /// structs, and unions. 1399 LookupTagName, 1400 /// Label name lookup. 1401 LookupLabel, 1402 /// Member name lookup, which finds the names of 1403 /// class/struct/union members. 1404 LookupMemberName, 1405 /// Look up of an operator name (e.g., operator+) for use with 1406 /// operator overloading. This lookup is similar to ordinary name 1407 /// lookup, but will ignore any declarations that are class members. 1408 LookupOperatorName, 1409 /// Look up of a name that precedes the '::' scope resolution 1410 /// operator in C++. This lookup completely ignores operator, object, 1411 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1412 LookupNestedNameSpecifierName, 1413 /// Look up a namespace name within a C++ using directive or 1414 /// namespace alias definition, ignoring non-namespace names (C++ 1415 /// [basic.lookup.udir]p1). 1416 LookupNamespaceName, 1417 /// Look up all declarations in a scope with the given name, 1418 /// including resolved using declarations. This is appropriate 1419 /// for checking redeclarations for a using declaration. 1420 LookupUsingDeclName, 1421 /// Look up an ordinary name that is going to be redeclared as a 1422 /// name with linkage. This lookup ignores any declarations that 1423 /// are outside of the current scope unless they have linkage. See 1424 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1425 LookupRedeclarationWithLinkage, 1426 /// Look up the name of an Objective-C protocol. 1427 LookupObjCProtocolName, 1428 /// \brief Look up any declaration with any name. 1429 LookupAnyName 1430 }; 1431 1432 /// \brief Specifies whether (or how) name lookup is being performed for a 1433 /// redeclaration (vs. a reference). 1434 enum RedeclarationKind { 1435 /// \brief The lookup is a reference to this name that is not for the 1436 /// purpose of redeclaring the name. 1437 NotForRedeclaration = 0, 1438 /// \brief The lookup results will be used for redeclaration of a name, 1439 /// if an entity by that name already exists. 1440 ForRedeclaration 1441 }; 1442 1443private: 1444 bool CppLookupName(LookupResult &R, Scope *S); 1445 1446public: 1447 /// \brief Look up a name, looking for a single declaration. Return 1448 /// null if the results were absent, ambiguous, or overloaded. 1449 /// 1450 /// It is preferable to use the elaborated form and explicitly handle 1451 /// ambiguity and overloaded. 1452 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1453 SourceLocation Loc, 1454 LookupNameKind NameKind, 1455 RedeclarationKind Redecl 1456 = NotForRedeclaration); 1457 bool LookupName(LookupResult &R, Scope *S, 1458 bool AllowBuiltinCreation = false); 1459 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1460 bool InUnqualifiedLookup = false); 1461 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1462 bool AllowBuiltinCreation = false, 1463 bool EnteringContext = false); 1464 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1465 1466 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1467 QualType T1, QualType T2, 1468 UnresolvedSetImpl &Functions); 1469 1470 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1471 SourceLocation GnuLabelLoc = SourceLocation()); 1472 1473 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1474 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1475 1476 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1477 Expr **Args, unsigned NumArgs, 1478 ADLResult &Functions, 1479 bool StdNamespaceIsAssociated = false); 1480 1481 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1482 VisibleDeclConsumer &Consumer, 1483 bool IncludeGlobalScope = true); 1484 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1485 VisibleDeclConsumer &Consumer, 1486 bool IncludeGlobalScope = true); 1487 1488 /// \brief The context in which typo-correction occurs. 1489 /// 1490 /// The typo-correction context affects which keywords (if any) are 1491 /// considered when trying to correct for typos. 1492 enum CorrectTypoContext { 1493 /// \brief An unknown context, where any keyword might be valid. 1494 CTC_Unknown, 1495 /// \brief A context where no keywords are used (e.g. we expect an actual 1496 /// name). 1497 CTC_NoKeywords, 1498 /// \brief A context where we're correcting a type name. 1499 CTC_Type, 1500 /// \brief An expression context. 1501 CTC_Expression, 1502 /// \brief A type cast, or anything else that can be followed by a '<'. 1503 CTC_CXXCasts, 1504 /// \brief A member lookup context. 1505 CTC_MemberLookup, 1506 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1507 CTC_ObjCIvarLookup, 1508 /// \brief An Objective-C property lookup context (e.g., self.prop). 1509 CTC_ObjCPropertyLookup, 1510 /// \brief The receiver of an Objective-C message send within an 1511 /// Objective-C method where 'super' is a valid keyword. 1512 CTC_ObjCMessageReceiver 1513 }; 1514 1515 DeclarationName CorrectTypo(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1516 DeclContext *MemberContext = 0, 1517 bool EnteringContext = false, 1518 CorrectTypoContext CTC = CTC_Unknown, 1519 const ObjCObjectPointerType *OPT = 0); 1520 1521 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1522 AssociatedNamespaceSet &AssociatedNamespaces, 1523 AssociatedClassSet &AssociatedClasses); 1524 1525 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1526 //@} 1527 1528 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1529 SourceLocation IdLoc, 1530 bool TypoCorrection = false); 1531 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1532 Scope *S, bool ForRedeclaration, 1533 SourceLocation Loc); 1534 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1535 Scope *S); 1536 void AddKnownFunctionAttributes(FunctionDecl *FD); 1537 1538 // More parsing and symbol table subroutines. 1539 1540 // Decl attributes - this routine is the top level dispatcher. 1541 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1542 bool NonInheritable = true, bool Inheritable = true); 1543 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1544 bool NonInheritable = true, bool Inheritable = true); 1545 1546 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1547 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1548 bool CheckNoReturnAttr(const AttributeList &attr); 1549 1550 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1551 bool &IncompleteImpl, unsigned DiagID); 1552 void WarnConflictingTypedMethods(ObjCMethodDecl *ImpMethod, 1553 ObjCMethodDecl *MethodDecl, 1554 bool IsProtocolMethodDecl); 1555 1556 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1557 ObjCInterfaceDecl *IDecl); 1558 1559 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1560 1561 /// CheckProtocolMethodDefs - This routine checks unimplemented 1562 /// methods declared in protocol, and those referenced by it. 1563 /// \param IDecl - Used for checking for methods which may have been 1564 /// inherited. 1565 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1566 ObjCProtocolDecl *PDecl, 1567 bool& IncompleteImpl, 1568 const SelectorSet &InsMap, 1569 const SelectorSet &ClsMap, 1570 ObjCContainerDecl *CDecl); 1571 1572 /// CheckImplementationIvars - This routine checks if the instance variables 1573 /// listed in the implelementation match those listed in the interface. 1574 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1575 ObjCIvarDecl **Fields, unsigned nIvars, 1576 SourceLocation Loc); 1577 1578 /// \brief Determine whether we can synthesize a provisional ivar for the 1579 /// given name. 1580 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1581 1582 /// \brief Determine whether we can synthesize a provisional ivar for the 1583 /// given property. 1584 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1585 1586 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1587 /// remains unimplemented in the class or category @implementation. 1588 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1589 ObjCContainerDecl* IDecl, 1590 bool IncompleteImpl = false); 1591 1592 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1593 /// which must be implemented by this implementation. 1594 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1595 ObjCContainerDecl *CDecl, 1596 const SelectorSet &InsMap); 1597 1598 /// DefaultSynthesizeProperties - This routine default synthesizes all 1599 /// properties which must be synthesized in class's @implementation. 1600 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1601 ObjCInterfaceDecl *IDecl); 1602 1603 /// CollectImmediateProperties - This routine collects all properties in 1604 /// the class and its conforming protocols; but not those it its super class. 1605 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1606 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1607 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1608 1609 1610 /// LookupPropertyDecl - Looks up a property in the current class and all 1611 /// its protocols. 1612 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1613 IdentifierInfo *II); 1614 1615 /// Called by ActOnProperty to handle @property declarations in 1616 //// class extensions. 1617 Decl *HandlePropertyInClassExtension(Scope *S, 1618 ObjCCategoryDecl *CDecl, 1619 SourceLocation AtLoc, 1620 FieldDeclarator &FD, 1621 Selector GetterSel, 1622 Selector SetterSel, 1623 const bool isAssign, 1624 const bool isReadWrite, 1625 const unsigned Attributes, 1626 bool *isOverridingProperty, 1627 TypeSourceInfo *T, 1628 tok::ObjCKeywordKind MethodImplKind); 1629 1630 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1631 /// handle creating the ObjcPropertyDecl for a category or @interface. 1632 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1633 ObjCContainerDecl *CDecl, 1634 SourceLocation AtLoc, 1635 FieldDeclarator &FD, 1636 Selector GetterSel, 1637 Selector SetterSel, 1638 const bool isAssign, 1639 const bool isReadWrite, 1640 const unsigned Attributes, 1641 TypeSourceInfo *T, 1642 tok::ObjCKeywordKind MethodImplKind, 1643 DeclContext *lexicalDC = 0); 1644 1645 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1646 /// warning) when atomic property has one but not the other user-declared 1647 /// setter or getter. 1648 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1649 ObjCContainerDecl* IDecl); 1650 1651 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1652 1653 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1654 /// true, or false, accordingly. 1655 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1656 const ObjCMethodDecl *PrevMethod, 1657 bool matchBasedOnSizeAndAlignment = false, 1658 bool matchBasedOnStrictEqulity = false); 1659 1660 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1661 /// or protocol against those declared in their implementations. 1662 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1663 const SelectorSet &ClsMap, 1664 SelectorSet &InsMapSeen, 1665 SelectorSet &ClsMapSeen, 1666 ObjCImplDecl* IMPDecl, 1667 ObjCContainerDecl* IDecl, 1668 bool &IncompleteImpl, 1669 bool ImmediateClass); 1670 1671private: 1672 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1673 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1674 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1675 1676 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1677 /// optionally warns if there are multiple signatures. 1678 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1679 bool receiverIdOrClass, 1680 bool warn, bool instance); 1681 1682public: 1683 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1684 /// unit are added to a global pool. This allows us to efficiently associate 1685 /// a selector with a method declaraation for purposes of typechecking 1686 /// messages sent to "id" (where the class of the object is unknown). 1687 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1688 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1689 } 1690 1691 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1692 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1693 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1694 } 1695 1696 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1697 /// there are multiple signatures. 1698 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1699 bool receiverIdOrClass=false, 1700 bool warn=true) { 1701 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1702 warn, /*instance*/true); 1703 } 1704 1705 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1706 /// there are multiple signatures. 1707 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1708 bool receiverIdOrClass=false, 1709 bool warn=true) { 1710 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1711 warn, /*instance*/false); 1712 } 1713 1714 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1715 /// implementation. 1716 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1717 1718 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1719 /// initialization. 1720 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1721 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1722 1723 //===--------------------------------------------------------------------===// 1724 // Statement Parsing Callbacks: SemaStmt.cpp. 1725public: 1726 class FullExprArg { 1727 public: 1728 FullExprArg(Sema &actions) : E(0) { } 1729 1730 // FIXME: The const_cast here is ugly. RValue references would make this 1731 // much nicer (or we could duplicate a bunch of the move semantics 1732 // emulation code from Ownership.h). 1733 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1734 1735 ExprResult release() { 1736 return move(E); 1737 } 1738 1739 Expr *get() const { return E; } 1740 1741 Expr *operator->() { 1742 return E; 1743 } 1744 1745 private: 1746 // FIXME: No need to make the entire Sema class a friend when it's just 1747 // Sema::MakeFullExpr that needs access to the constructor below. 1748 friend class Sema; 1749 1750 explicit FullExprArg(Expr *expr) : E(expr) {} 1751 1752 Expr *E; 1753 }; 1754 1755 FullExprArg MakeFullExpr(Expr *Arg) { 1756 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1757 } 1758 1759 StmtResult ActOnExprStmt(FullExprArg Expr); 1760 1761 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1762 bool LeadingEmptyMacro = false); 1763 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1764 MultiStmtArg Elts, 1765 bool isStmtExpr); 1766 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1767 SourceLocation StartLoc, 1768 SourceLocation EndLoc); 1769 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1770 StmtResult ActOnForEachLValueExpr(Expr *E); 1771 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1772 SourceLocation DotDotDotLoc, Expr *RHSVal, 1773 SourceLocation ColonLoc); 1774 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 1775 1776 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 1777 SourceLocation ColonLoc, 1778 Stmt *SubStmt, Scope *CurScope); 1779 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 1780 SourceLocation ColonLoc, Stmt *SubStmt); 1781 1782 StmtResult ActOnIfStmt(SourceLocation IfLoc, 1783 FullExprArg CondVal, Decl *CondVar, 1784 Stmt *ThenVal, 1785 SourceLocation ElseLoc, Stmt *ElseVal); 1786 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 1787 Expr *Cond, 1788 Decl *CondVar); 1789 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 1790 Stmt *Switch, Stmt *Body); 1791 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 1792 FullExprArg Cond, 1793 Decl *CondVar, Stmt *Body); 1794 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 1795 SourceLocation WhileLoc, 1796 SourceLocation CondLParen, Expr *Cond, 1797 SourceLocation CondRParen); 1798 1799 StmtResult ActOnForStmt(SourceLocation ForLoc, 1800 SourceLocation LParenLoc, 1801 Stmt *First, FullExprArg Second, 1802 Decl *SecondVar, 1803 FullExprArg Third, 1804 SourceLocation RParenLoc, 1805 Stmt *Body); 1806 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 1807 SourceLocation LParenLoc, 1808 Stmt *First, Expr *Second, 1809 SourceLocation RParenLoc, Stmt *Body); 1810 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 1811 SourceLocation LParenLoc, Stmt *LoopVar, 1812 SourceLocation ColonLoc, Expr *Collection, 1813 SourceLocation RParenLoc); 1814 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 1815 SourceLocation ColonLoc, 1816 Stmt *RangeDecl, Stmt *BeginEndDecl, 1817 Expr *Cond, Expr *Inc, 1818 Stmt *LoopVarDecl, 1819 SourceLocation RParenLoc); 1820 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 1821 1822 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 1823 SourceLocation LabelLoc, 1824 LabelDecl *TheDecl); 1825 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 1826 SourceLocation StarLoc, 1827 Expr *DestExp); 1828 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 1829 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 1830 1831 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 1832 bool AllowFunctionParameters); 1833 1834 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1835 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 1836 1837 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 1838 bool IsSimple, bool IsVolatile, 1839 unsigned NumOutputs, unsigned NumInputs, 1840 IdentifierInfo **Names, 1841 MultiExprArg Constraints, 1842 MultiExprArg Exprs, 1843 Expr *AsmString, 1844 MultiExprArg Clobbers, 1845 SourceLocation RParenLoc, 1846 bool MSAsm = false); 1847 1848 1849 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 1850 SourceLocation StartLoc, 1851 SourceLocation IdLoc, IdentifierInfo *Id, 1852 bool Invalid = false); 1853 1854 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 1855 1856 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 1857 Decl *Parm, Stmt *Body); 1858 1859 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 1860 1861 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 1862 MultiStmtArg Catch, Stmt *Finally); 1863 1864 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 1865 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 1866 Scope *CurScope); 1867 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 1868 Expr *SynchExpr, 1869 Stmt *SynchBody); 1870 1871 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 1872 SourceLocation StartLoc, 1873 SourceLocation IdLoc, 1874 IdentifierInfo *Id); 1875 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 1876 1877 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 1878 Decl *ExDecl, Stmt *HandlerBlock); 1879 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 1880 MultiStmtArg Handlers); 1881 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 1882 1883 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 1884 1885 /// \brief If it's a file scoped decl that must warn if not used, keep track 1886 /// of it. 1887 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 1888 1889 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 1890 /// whose result is unused, warn. 1891 void DiagnoseUnusedExprResult(const Stmt *S); 1892 void DiagnoseUnusedDecl(const NamedDecl *ND); 1893 1894 ParsingDeclState PushParsingDeclaration() { 1895 return DelayedDiagnostics.pushParsingDecl(); 1896 } 1897 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 1898 DelayedDiagnostics::popParsingDecl(*this, state, decl); 1899 } 1900 1901 typedef ProcessingContextState ParsingClassState; 1902 ParsingClassState PushParsingClass() { 1903 return DelayedDiagnostics.pushContext(); 1904 } 1905 void PopParsingClass(ParsingClassState state) { 1906 DelayedDiagnostics.popContext(state); 1907 } 1908 1909 void EmitDeprecationWarning(NamedDecl *D, llvm::StringRef Message, 1910 SourceLocation Loc, bool UnknownObjCClass=false); 1911 1912 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 1913 1914 //===--------------------------------------------------------------------===// 1915 // Expression Parsing Callbacks: SemaExpr.cpp. 1916 1917 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 1918 bool UnknownObjCClass=false); 1919 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 1920 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 1921 ObjCMethodDecl *Getter, 1922 SourceLocation Loc); 1923 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 1924 Expr **Args, unsigned NumArgs); 1925 1926 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 1927 1928 void PopExpressionEvaluationContext(); 1929 1930 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 1931 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 1932 void MarkDeclarationsReferencedInExpr(Expr *E); 1933 1934 /// \brief Conditionally issue a diagnostic based on the current 1935 /// evaluation context. 1936 /// 1937 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 1938 /// the function body is parsed, and then do a basic reachability analysis to 1939 /// determine if the statement is reachable. If it is unreachable, the 1940 /// diagnostic will not be emitted. 1941 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 1942 const PartialDiagnostic &PD); 1943 1944 // Primary Expressions. 1945 SourceRange getExprRange(Expr *E) const; 1946 1947 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 1948 bool HasTrailingLParen, bool IsAddressOfOperand); 1949 1950 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 1951 CorrectTypoContext CTC = CTC_Unknown); 1952 1953 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 1954 bool AllowBuiltinCreation=false); 1955 1956 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 1957 const DeclarationNameInfo &NameInfo, 1958 bool isAddressOfOperand, 1959 const TemplateArgumentListInfo *TemplateArgs); 1960 1961 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1962 ExprValueKind VK, 1963 SourceLocation Loc, 1964 const CXXScopeSpec *SS = 0); 1965 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 1966 ExprValueKind VK, 1967 const DeclarationNameInfo &NameInfo, 1968 const CXXScopeSpec *SS = 0); 1969 ExprResult 1970 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 1971 SourceLocation nameLoc, 1972 IndirectFieldDecl *indirectField, 1973 Expr *baseObjectExpr = 0, 1974 SourceLocation opLoc = SourceLocation()); 1975 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 1976 LookupResult &R, 1977 const TemplateArgumentListInfo *TemplateArgs); 1978 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 1979 LookupResult &R, 1980 const TemplateArgumentListInfo *TemplateArgs, 1981 bool IsDefiniteInstance); 1982 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 1983 const LookupResult &R, 1984 bool HasTrailingLParen); 1985 1986 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 1987 const DeclarationNameInfo &NameInfo); 1988 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 1989 const DeclarationNameInfo &NameInfo, 1990 const TemplateArgumentListInfo *TemplateArgs); 1991 1992 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1993 LookupResult &R, 1994 bool ADL); 1995 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 1996 const DeclarationNameInfo &NameInfo, 1997 NamedDecl *D); 1998 1999 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2000 ExprResult ActOnNumericConstant(const Token &); 2001 ExprResult ActOnCharacterConstant(const Token &); 2002 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2003 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2004 SourceLocation R, 2005 MultiExprArg Val, 2006 ParsedType TypeOfCast = ParsedType()); 2007 2008 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2009 /// fragments (e.g. "foo" "bar" L"baz"). 2010 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2011 2012 // Binary/Unary Operators. 'Tok' is the token for the operator. 2013 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2014 Expr *InputArg); 2015 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2016 UnaryOperatorKind Opc, Expr *input); 2017 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2018 tok::TokenKind Op, Expr *Input); 2019 2020 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2021 SourceLocation OpLoc, 2022 UnaryExprOrTypeTrait ExprKind, 2023 SourceRange R); 2024 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2025 UnaryExprOrTypeTrait ExprKind, 2026 SourceRange R); 2027 ExprResult 2028 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2029 UnaryExprOrTypeTrait ExprKind, 2030 bool isType, void *TyOrEx, 2031 const SourceRange &ArgRange); 2032 2033 ExprResult CheckPlaceholderExpr(Expr *E); 2034 bool CheckVecStepExpr(Expr *E, SourceLocation OpLoc, SourceRange R); 2035 2036 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2037 SourceRange R, 2038 UnaryExprOrTypeTrait ExprKind); 2039 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2040 SourceLocation OpLoc, 2041 IdentifierInfo &Name, 2042 SourceLocation NameLoc, 2043 SourceLocation RParenLoc); 2044 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2045 tok::TokenKind Kind, Expr *Input); 2046 2047 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2048 Expr *Idx, SourceLocation RLoc); 2049 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2050 Expr *Idx, SourceLocation RLoc); 2051 2052 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2053 SourceLocation OpLoc, bool IsArrow, 2054 CXXScopeSpec &SS, 2055 NamedDecl *FirstQualifierInScope, 2056 const DeclarationNameInfo &NameInfo, 2057 const TemplateArgumentListInfo *TemplateArgs); 2058 2059 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2060 SourceLocation OpLoc, bool IsArrow, 2061 const CXXScopeSpec &SS, 2062 NamedDecl *FirstQualifierInScope, 2063 LookupResult &R, 2064 const TemplateArgumentListInfo *TemplateArgs, 2065 bool SuppressQualifierCheck = false); 2066 2067 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2068 bool &IsArrow, SourceLocation OpLoc, 2069 CXXScopeSpec &SS, 2070 Decl *ObjCImpDecl, 2071 bool HasTemplateArgs); 2072 2073 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2074 const CXXScopeSpec &SS, 2075 const LookupResult &R); 2076 2077 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2078 bool IsArrow, SourceLocation OpLoc, 2079 const CXXScopeSpec &SS, 2080 NamedDecl *FirstQualifierInScope, 2081 const DeclarationNameInfo &NameInfo, 2082 const TemplateArgumentListInfo *TemplateArgs); 2083 2084 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2085 SourceLocation OpLoc, 2086 tok::TokenKind OpKind, 2087 CXXScopeSpec &SS, 2088 UnqualifiedId &Member, 2089 Decl *ObjCImpDecl, 2090 bool HasTrailingLParen); 2091 2092 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2093 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2094 FunctionDecl *FDecl, 2095 const FunctionProtoType *Proto, 2096 Expr **Args, unsigned NumArgs, 2097 SourceLocation RParenLoc); 2098 2099 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2100 /// This provides the location of the left/right parens and a list of comma 2101 /// locations. 2102 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2103 MultiExprArg Args, SourceLocation RParenLoc, 2104 Expr *ExecConfig = 0); 2105 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2106 SourceLocation LParenLoc, 2107 Expr **Args, unsigned NumArgs, 2108 SourceLocation RParenLoc, 2109 Expr *ExecConfig = 0); 2110 2111 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2112 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2113 2114 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2115 ParsedType Ty, SourceLocation RParenLoc, 2116 Expr *Op); 2117 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2118 TypeSourceInfo *Ty, 2119 SourceLocation RParenLoc, 2120 Expr *Op); 2121 2122 bool TypeIsVectorType(ParsedType Ty) { 2123 return GetTypeFromParser(Ty)->isVectorType(); 2124 } 2125 2126 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2127 ExprResult ActOnCastOfParenListExpr(Scope *S, SourceLocation LParenLoc, 2128 SourceLocation RParenLoc, Expr *E, 2129 TypeSourceInfo *TInfo); 2130 2131 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2132 ParsedType Ty, 2133 SourceLocation RParenLoc, 2134 Expr *Op); 2135 2136 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2137 TypeSourceInfo *TInfo, 2138 SourceLocation RParenLoc, 2139 Expr *InitExpr); 2140 2141 ExprResult ActOnInitList(SourceLocation LParenLoc, 2142 MultiExprArg InitList, 2143 SourceLocation RParenLoc); 2144 2145 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2146 SourceLocation Loc, 2147 bool GNUSyntax, 2148 ExprResult Init); 2149 2150 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2151 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2152 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2153 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2154 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2155 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2156 2157 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2158 /// in the case of a the GNU conditional expr extension. 2159 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2160 SourceLocation ColonLoc, 2161 Expr *Cond, Expr *LHS, Expr *RHS); 2162 2163 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2164 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2165 LabelDecl *LD); 2166 2167 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2168 SourceLocation RPLoc); // "({..})" 2169 2170 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2171 struct OffsetOfComponent { 2172 SourceLocation LocStart, LocEnd; 2173 bool isBrackets; // true if [expr], false if .ident 2174 union { 2175 IdentifierInfo *IdentInfo; 2176 ExprTy *E; 2177 } U; 2178 }; 2179 2180 /// __builtin_offsetof(type, a.b[123][456].c) 2181 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2182 TypeSourceInfo *TInfo, 2183 OffsetOfComponent *CompPtr, 2184 unsigned NumComponents, 2185 SourceLocation RParenLoc); 2186 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2187 SourceLocation BuiltinLoc, 2188 SourceLocation TypeLoc, 2189 ParsedType Arg1, 2190 OffsetOfComponent *CompPtr, 2191 unsigned NumComponents, 2192 SourceLocation RParenLoc); 2193 2194 // __builtin_choose_expr(constExpr, expr1, expr2) 2195 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2196 Expr *cond, Expr *expr1, 2197 Expr *expr2, SourceLocation RPLoc); 2198 2199 // __builtin_va_arg(expr, type) 2200 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2201 Expr *expr, ParsedType type, 2202 SourceLocation RPLoc); 2203 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2204 Expr *expr, TypeSourceInfo *TInfo, 2205 SourceLocation RPLoc); 2206 2207 // __null 2208 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2209 2210 //===------------------------- "Block" Extension ------------------------===// 2211 2212 /// ActOnBlockStart - This callback is invoked when a block literal is 2213 /// started. 2214 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2215 2216 /// ActOnBlockArguments - This callback allows processing of block arguments. 2217 /// If there are no arguments, this is still invoked. 2218 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2219 2220 /// ActOnBlockError - If there is an error parsing a block, this callback 2221 /// is invoked to pop the information about the block from the action impl. 2222 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2223 2224 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2225 /// literal was successfully completed. ^(int x){...} 2226 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2227 Stmt *Body, Scope *CurScope); 2228 2229 //===---------------------------- C++ Features --------------------------===// 2230 2231 // Act on C++ namespaces 2232 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2233 SourceLocation NamespaceLoc, 2234 SourceLocation IdentLoc, 2235 IdentifierInfo *Ident, 2236 SourceLocation LBrace, 2237 AttributeList *AttrList); 2238 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2239 2240 NamespaceDecl *getStdNamespace() const; 2241 NamespaceDecl *getOrCreateStdNamespace(); 2242 2243 CXXRecordDecl *getStdBadAlloc() const; 2244 2245 Decl *ActOnUsingDirective(Scope *CurScope, 2246 SourceLocation UsingLoc, 2247 SourceLocation NamespcLoc, 2248 CXXScopeSpec &SS, 2249 SourceLocation IdentLoc, 2250 IdentifierInfo *NamespcName, 2251 AttributeList *AttrList); 2252 2253 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2254 2255 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2256 SourceLocation NamespaceLoc, 2257 SourceLocation AliasLoc, 2258 IdentifierInfo *Alias, 2259 CXXScopeSpec &SS, 2260 SourceLocation IdentLoc, 2261 IdentifierInfo *Ident); 2262 2263 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2264 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2265 const LookupResult &PreviousDecls); 2266 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2267 NamedDecl *Target); 2268 2269 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2270 bool isTypeName, 2271 const CXXScopeSpec &SS, 2272 SourceLocation NameLoc, 2273 const LookupResult &Previous); 2274 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2275 const CXXScopeSpec &SS, 2276 SourceLocation NameLoc); 2277 2278 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2279 SourceLocation UsingLoc, 2280 CXXScopeSpec &SS, 2281 const DeclarationNameInfo &NameInfo, 2282 AttributeList *AttrList, 2283 bool IsInstantiation, 2284 bool IsTypeName, 2285 SourceLocation TypenameLoc); 2286 2287 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2288 2289 Decl *ActOnUsingDeclaration(Scope *CurScope, 2290 AccessSpecifier AS, 2291 bool HasUsingKeyword, 2292 SourceLocation UsingLoc, 2293 CXXScopeSpec &SS, 2294 UnqualifiedId &Name, 2295 AttributeList *AttrList, 2296 bool IsTypeName, 2297 SourceLocation TypenameLoc); 2298 2299 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2300 /// ActOnDeclarator, when a C++ direct initializer is present. 2301 /// e.g: "int x(1);" 2302 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2303 SourceLocation LParenLoc, 2304 MultiExprArg Exprs, 2305 SourceLocation RParenLoc, 2306 bool TypeMayContainAuto); 2307 2308 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2309 /// and sets it as the initializer for the the passed in VarDecl. 2310 bool InitializeVarWithConstructor(VarDecl *VD, 2311 CXXConstructorDecl *Constructor, 2312 MultiExprArg Exprs); 2313 2314 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2315 /// including handling of its default argument expressions. 2316 /// 2317 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2318 ExprResult 2319 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2320 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2321 bool RequiresZeroInit, unsigned ConstructKind, 2322 SourceRange ParenRange); 2323 2324 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2325 // the constructor can be elidable? 2326 ExprResult 2327 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2328 CXXConstructorDecl *Constructor, bool Elidable, 2329 MultiExprArg Exprs, bool RequiresZeroInit, 2330 unsigned ConstructKind, 2331 SourceRange ParenRange); 2332 2333 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2334 /// the default expr if needed. 2335 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2336 FunctionDecl *FD, 2337 ParmVarDecl *Param); 2338 2339 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2340 /// constructed variable. 2341 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2342 2343 /// \brief Declare the implicit default constructor for the given class. 2344 /// 2345 /// \param ClassDecl The class declaration into which the implicit 2346 /// default constructor will be added. 2347 /// 2348 /// \returns The implicitly-declared default constructor. 2349 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2350 CXXRecordDecl *ClassDecl); 2351 2352 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2353 /// defining this constructor as the default constructor. 2354 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2355 CXXConstructorDecl *Constructor); 2356 2357 /// \brief Declare the implicit destructor for the given class. 2358 /// 2359 /// \param ClassDecl The class declaration into which the implicit 2360 /// destructor will be added. 2361 /// 2362 /// \returns The implicitly-declared destructor. 2363 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2364 2365 /// DefineImplicitDestructor - Checks for feasibility of 2366 /// defining this destructor as the default destructor. 2367 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2368 CXXDestructorDecl *Destructor); 2369 2370 /// \brief Declare all inherited constructors for the given class. 2371 /// 2372 /// \param ClassDecl The class declaration into which the inherited 2373 /// constructors will be added. 2374 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2375 2376 /// \brief Declare the implicit copy constructor for the given class. 2377 /// 2378 /// \param S The scope of the class, which may be NULL if this is a 2379 /// template instantiation. 2380 /// 2381 /// \param ClassDecl The class declaration into which the implicit 2382 /// copy constructor will be added. 2383 /// 2384 /// \returns The implicitly-declared copy constructor. 2385 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2386 2387 /// DefineImplicitCopyConstructor - Checks for feasibility of 2388 /// defining this constructor as the copy constructor. 2389 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2390 CXXConstructorDecl *Constructor, 2391 unsigned TypeQuals); 2392 2393 /// \brief Declare the implicit copy assignment operator for the given class. 2394 /// 2395 /// \param S The scope of the class, which may be NULL if this is a 2396 /// template instantiation. 2397 /// 2398 /// \param ClassDecl The class declaration into which the implicit 2399 /// copy-assignment operator will be added. 2400 /// 2401 /// \returns The implicitly-declared copy assignment operator. 2402 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2403 2404 /// \brief Defined an implicitly-declared copy assignment operator. 2405 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2406 CXXMethodDecl *MethodDecl); 2407 2408 /// \brief Force the declaration of any implicitly-declared members of this 2409 /// class. 2410 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2411 2412 /// MaybeBindToTemporary - If the passed in expression has a record type with 2413 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2414 /// it simply returns the passed in expression. 2415 ExprResult MaybeBindToTemporary(Expr *E); 2416 2417 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2418 MultiExprArg ArgsPtr, 2419 SourceLocation Loc, 2420 ASTOwningVector<Expr*> &ConvertedArgs); 2421 2422 ParsedType getDestructorName(SourceLocation TildeLoc, 2423 IdentifierInfo &II, SourceLocation NameLoc, 2424 Scope *S, CXXScopeSpec &SS, 2425 ParsedType ObjectType, 2426 bool EnteringContext); 2427 2428 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2429 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2430 tok::TokenKind Kind, 2431 SourceLocation LAngleBracketLoc, 2432 ParsedType Ty, 2433 SourceLocation RAngleBracketLoc, 2434 SourceLocation LParenLoc, 2435 Expr *E, 2436 SourceLocation RParenLoc); 2437 2438 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2439 tok::TokenKind Kind, 2440 TypeSourceInfo *Ty, 2441 Expr *E, 2442 SourceRange AngleBrackets, 2443 SourceRange Parens); 2444 2445 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2446 SourceLocation TypeidLoc, 2447 TypeSourceInfo *Operand, 2448 SourceLocation RParenLoc); 2449 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2450 SourceLocation TypeidLoc, 2451 Expr *Operand, 2452 SourceLocation RParenLoc); 2453 2454 /// ActOnCXXTypeid - Parse typeid( something ). 2455 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2456 SourceLocation LParenLoc, bool isType, 2457 void *TyOrExpr, 2458 SourceLocation RParenLoc); 2459 2460 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2461 SourceLocation TypeidLoc, 2462 TypeSourceInfo *Operand, 2463 SourceLocation RParenLoc); 2464 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2465 SourceLocation TypeidLoc, 2466 Expr *Operand, 2467 SourceLocation RParenLoc); 2468 2469 /// ActOnCXXUuidof - Parse __uuidof( something ). 2470 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2471 SourceLocation LParenLoc, bool isType, 2472 void *TyOrExpr, 2473 SourceLocation RParenLoc); 2474 2475 2476 //// ActOnCXXThis - Parse 'this' pointer. 2477 ExprResult ActOnCXXThis(SourceLocation loc); 2478 2479 /// tryCaptureCXXThis - Try to capture a 'this' pointer. Returns a 2480 /// pointer to an instance method whose 'this' pointer is 2481 /// capturable, or null if this is not possible. 2482 CXXMethodDecl *tryCaptureCXXThis(); 2483 2484 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2485 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2486 2487 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2488 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2489 2490 //// ActOnCXXThrow - Parse throw expressions. 2491 ExprResult ActOnCXXThrow(SourceLocation OpLoc, Expr *expr); 2492 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E); 2493 2494 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2495 /// Can be interpreted either as function-style casting ("int(x)") 2496 /// or class type construction ("ClassType(x,y,z)") 2497 /// or creation of a value-initialized type ("int()"). 2498 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2499 SourceLocation LParenLoc, 2500 MultiExprArg Exprs, 2501 SourceLocation RParenLoc); 2502 2503 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2504 SourceLocation LParenLoc, 2505 MultiExprArg Exprs, 2506 SourceLocation RParenLoc); 2507 2508 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2509 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2510 SourceLocation PlacementLParen, 2511 MultiExprArg PlacementArgs, 2512 SourceLocation PlacementRParen, 2513 SourceRange TypeIdParens, Declarator &D, 2514 SourceLocation ConstructorLParen, 2515 MultiExprArg ConstructorArgs, 2516 SourceLocation ConstructorRParen); 2517 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2518 SourceLocation PlacementLParen, 2519 MultiExprArg PlacementArgs, 2520 SourceLocation PlacementRParen, 2521 SourceRange TypeIdParens, 2522 QualType AllocType, 2523 TypeSourceInfo *AllocTypeInfo, 2524 Expr *ArraySize, 2525 SourceLocation ConstructorLParen, 2526 MultiExprArg ConstructorArgs, 2527 SourceLocation ConstructorRParen, 2528 bool TypeMayContainAuto = true); 2529 2530 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2531 SourceRange R); 2532 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2533 bool UseGlobal, QualType AllocType, bool IsArray, 2534 Expr **PlaceArgs, unsigned NumPlaceArgs, 2535 FunctionDecl *&OperatorNew, 2536 FunctionDecl *&OperatorDelete); 2537 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2538 DeclarationName Name, Expr** Args, 2539 unsigned NumArgs, DeclContext *Ctx, 2540 bool AllowMissing, FunctionDecl *&Operator); 2541 void DeclareGlobalNewDelete(); 2542 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2543 QualType Argument, 2544 bool addMallocAttr = false); 2545 2546 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2547 DeclarationName Name, FunctionDecl* &Operator); 2548 2549 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2550 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2551 bool UseGlobal, bool ArrayForm, 2552 Expr *Operand); 2553 2554 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2555 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2556 SourceLocation StmtLoc, 2557 bool ConvertToBoolean); 2558 2559 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2560 Expr *Operand, SourceLocation RParen); 2561 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2562 SourceLocation RParen); 2563 2564 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2565 /// pseudo-functions. 2566 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2567 SourceLocation KWLoc, 2568 ParsedType Ty, 2569 SourceLocation RParen); 2570 2571 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2572 SourceLocation KWLoc, 2573 TypeSourceInfo *T, 2574 SourceLocation RParen); 2575 2576 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2577 /// pseudo-functions. 2578 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2579 SourceLocation KWLoc, 2580 ParsedType LhsTy, 2581 ParsedType RhsTy, 2582 SourceLocation RParen); 2583 2584 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2585 SourceLocation KWLoc, 2586 TypeSourceInfo *LhsT, 2587 TypeSourceInfo *RhsT, 2588 SourceLocation RParen); 2589 2590 ExprResult ActOnStartCXXMemberReference(Scope *S, 2591 Expr *Base, 2592 SourceLocation OpLoc, 2593 tok::TokenKind OpKind, 2594 ParsedType &ObjectType, 2595 bool &MayBePseudoDestructor); 2596 2597 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 2598 2599 ExprResult BuildPseudoDestructorExpr(Expr *Base, 2600 SourceLocation OpLoc, 2601 tok::TokenKind OpKind, 2602 const CXXScopeSpec &SS, 2603 TypeSourceInfo *ScopeType, 2604 SourceLocation CCLoc, 2605 SourceLocation TildeLoc, 2606 PseudoDestructorTypeStorage DestroyedType, 2607 bool HasTrailingLParen); 2608 2609 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 2610 SourceLocation OpLoc, 2611 tok::TokenKind OpKind, 2612 CXXScopeSpec &SS, 2613 UnqualifiedId &FirstTypeName, 2614 SourceLocation CCLoc, 2615 SourceLocation TildeLoc, 2616 UnqualifiedId &SecondTypeName, 2617 bool HasTrailingLParen); 2618 2619 /// MaybeCreateExprWithCleanups - If the current full-expression 2620 /// requires any cleanups, surround it with a ExprWithCleanups node. 2621 /// Otherwise, just returns the passed-in expression. 2622 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 2623 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 2624 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 2625 2626 ExprResult ActOnFinishFullExpr(Expr *Expr); 2627 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 2628 2629 // Marks SS invalid if it represents an incomplete type. 2630 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 2631 2632 DeclContext *computeDeclContext(QualType T); 2633 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 2634 bool EnteringContext = false); 2635 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 2636 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 2637 bool isUnknownSpecialization(const CXXScopeSpec &SS); 2638 2639 /// \brief The parser has parsed a global nested-name-specifier '::'. 2640 /// 2641 /// \param S The scope in which this nested-name-specifier occurs. 2642 /// 2643 /// \param CCLoc The location of the '::'. 2644 /// 2645 /// \param SS The nested-name-specifier, which will be updated in-place 2646 /// to reflect the parsed nested-name-specifier. 2647 /// 2648 /// \returns true if an error occurred, false otherwise. 2649 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 2650 CXXScopeSpec &SS); 2651 2652 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 2653 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 2654 2655 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 2656 SourceLocation IdLoc, 2657 IdentifierInfo &II, 2658 ParsedType ObjectType); 2659 2660 bool BuildCXXNestedNameSpecifier(Scope *S, 2661 IdentifierInfo &Identifier, 2662 SourceLocation IdentifierLoc, 2663 SourceLocation CCLoc, 2664 QualType ObjectType, 2665 bool EnteringContext, 2666 CXXScopeSpec &SS, 2667 NamedDecl *ScopeLookupResult, 2668 bool ErrorRecoveryLookup); 2669 2670 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 2671 /// 2672 /// \param S The scope in which this nested-name-specifier occurs. 2673 /// 2674 /// \param Identifier The identifier preceding the '::'. 2675 /// 2676 /// \param IdentifierLoc The location of the identifier. 2677 /// 2678 /// \param CCLoc The location of the '::'. 2679 /// 2680 /// \param ObjectType The type of the object, if we're parsing 2681 /// nested-name-specifier in a member access expression. 2682 /// 2683 /// \param EnteringContext Whether we're entering the context nominated by 2684 /// this nested-name-specifier. 2685 /// 2686 /// \param SS The nested-name-specifier, which is both an input 2687 /// parameter (the nested-name-specifier before this type) and an 2688 /// output parameter (containing the full nested-name-specifier, 2689 /// including this new type). 2690 /// 2691 /// \returns true if an error occurred, false otherwise. 2692 bool ActOnCXXNestedNameSpecifier(Scope *S, 2693 IdentifierInfo &Identifier, 2694 SourceLocation IdentifierLoc, 2695 SourceLocation CCLoc, 2696 ParsedType ObjectType, 2697 bool EnteringContext, 2698 CXXScopeSpec &SS); 2699 2700 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 2701 IdentifierInfo &Identifier, 2702 SourceLocation IdentifierLoc, 2703 SourceLocation ColonLoc, 2704 ParsedType ObjectType, 2705 bool EnteringContext); 2706 2707 /// \brief The parser has parsed a nested-name-specifier 2708 /// 'template[opt] template-name < template-args >::'. 2709 /// 2710 /// \param S The scope in which this nested-name-specifier occurs. 2711 /// 2712 /// \param TemplateLoc The location of the 'template' keyword, if any. 2713 /// 2714 /// \param SS The nested-name-specifier, which is both an input 2715 /// parameter (the nested-name-specifier before this type) and an 2716 /// output parameter (containing the full nested-name-specifier, 2717 /// including this new type). 2718 /// 2719 /// \param TemplateLoc the location of the 'template' keyword, if any. 2720 /// \param TemplateName The template name. 2721 /// \param TemplateNameLoc The location of the template name. 2722 /// \param LAngleLoc The location of the opening angle bracket ('<'). 2723 /// \param TemplateArgs The template arguments. 2724 /// \param RAngleLoc The location of the closing angle bracket ('>'). 2725 /// \param CCLoc The location of the '::'. 2726 2727 /// \param EnteringContext Whether we're entering the context of the 2728 /// nested-name-specifier. 2729 /// 2730 /// 2731 /// \returns true if an error occurred, false otherwise. 2732 bool ActOnCXXNestedNameSpecifier(Scope *S, 2733 SourceLocation TemplateLoc, 2734 CXXScopeSpec &SS, 2735 TemplateTy Template, 2736 SourceLocation TemplateNameLoc, 2737 SourceLocation LAngleLoc, 2738 ASTTemplateArgsPtr TemplateArgs, 2739 SourceLocation RAngleLoc, 2740 SourceLocation CCLoc, 2741 bool EnteringContext); 2742 2743 /// \brief Given a C++ nested-name-specifier, produce an annotation value 2744 /// that the parser can use later to reconstruct the given 2745 /// nested-name-specifier. 2746 /// 2747 /// \param SS A nested-name-specifier. 2748 /// 2749 /// \returns A pointer containing all of the information in the 2750 /// nested-name-specifier \p SS. 2751 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 2752 2753 /// \brief Given an annotation pointer for a nested-name-specifier, restore 2754 /// the nested-name-specifier structure. 2755 /// 2756 /// \param Annotation The annotation pointer, produced by 2757 /// \c SaveNestedNameSpecifierAnnotation(). 2758 /// 2759 /// \param AnnotationRange The source range corresponding to the annotation. 2760 /// 2761 /// \param SS The nested-name-specifier that will be updated with the contents 2762 /// of the annotation pointer. 2763 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 2764 SourceRange AnnotationRange, 2765 CXXScopeSpec &SS); 2766 2767 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2768 2769 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 2770 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 2771 /// After this method is called, according to [C++ 3.4.3p3], names should be 2772 /// looked up in the declarator-id's scope, until the declarator is parsed and 2773 /// ActOnCXXExitDeclaratorScope is called. 2774 /// The 'SS' should be a non-empty valid CXXScopeSpec. 2775 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 2776 2777 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 2778 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 2779 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 2780 /// Used to indicate that names should revert to being looked up in the 2781 /// defining scope. 2782 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 2783 2784 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 2785 /// initializer for the declaration 'Dcl'. 2786 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 2787 /// static data member of class X, names should be looked up in the scope of 2788 /// class X. 2789 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 2790 2791 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 2792 /// initializer for the declaration 'Dcl'. 2793 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 2794 2795 // ParseObjCStringLiteral - Parse Objective-C string literals. 2796 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 2797 Expr **Strings, 2798 unsigned NumStrings); 2799 2800 Expr *BuildObjCEncodeExpression(SourceLocation AtLoc, 2801 TypeSourceInfo *EncodedTypeInfo, 2802 SourceLocation RParenLoc); 2803 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 2804 CXXMethodDecl *Method); 2805 2806 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 2807 SourceLocation EncodeLoc, 2808 SourceLocation LParenLoc, 2809 ParsedType Ty, 2810 SourceLocation RParenLoc); 2811 2812 // ParseObjCSelectorExpression - Build selector expression for @selector 2813 ExprResult ParseObjCSelectorExpression(Selector Sel, 2814 SourceLocation AtLoc, 2815 SourceLocation SelLoc, 2816 SourceLocation LParenLoc, 2817 SourceLocation RParenLoc); 2818 2819 // ParseObjCProtocolExpression - Build protocol expression for @protocol 2820 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 2821 SourceLocation AtLoc, 2822 SourceLocation ProtoLoc, 2823 SourceLocation LParenLoc, 2824 SourceLocation RParenLoc); 2825 2826 //===--------------------------------------------------------------------===// 2827 // C++ Declarations 2828 // 2829 Decl *ActOnStartLinkageSpecification(Scope *S, 2830 SourceLocation ExternLoc, 2831 SourceLocation LangLoc, 2832 llvm::StringRef Lang, 2833 SourceLocation LBraceLoc); 2834 Decl *ActOnFinishLinkageSpecification(Scope *S, 2835 Decl *LinkageSpec, 2836 SourceLocation RBraceLoc); 2837 2838 2839 //===--------------------------------------------------------------------===// 2840 // C++ Classes 2841 // 2842 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 2843 const CXXScopeSpec *SS = 0); 2844 2845 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 2846 SourceLocation ASLoc, 2847 SourceLocation ColonLoc); 2848 2849 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 2850 Declarator &D, 2851 MultiTemplateParamsArg TemplateParameterLists, 2852 Expr *BitfieldWidth, const VirtSpecifiers &VS, 2853 Expr *Init, bool IsDefinition, 2854 bool Deleted = false); 2855 2856 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 2857 Scope *S, 2858 CXXScopeSpec &SS, 2859 IdentifierInfo *MemberOrBase, 2860 ParsedType TemplateTypeTy, 2861 SourceLocation IdLoc, 2862 SourceLocation LParenLoc, 2863 Expr **Args, unsigned NumArgs, 2864 SourceLocation RParenLoc, 2865 SourceLocation EllipsisLoc); 2866 2867 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 2868 unsigned NumArgs, SourceLocation IdLoc, 2869 SourceLocation LParenLoc, 2870 SourceLocation RParenLoc); 2871 2872 MemInitResult BuildBaseInitializer(QualType BaseType, 2873 TypeSourceInfo *BaseTInfo, 2874 Expr **Args, unsigned NumArgs, 2875 SourceLocation LParenLoc, 2876 SourceLocation RParenLoc, 2877 CXXRecordDecl *ClassDecl, 2878 SourceLocation EllipsisLoc); 2879 2880 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 2881 Expr **Args, unsigned NumArgs, 2882 SourceLocation BaseLoc, 2883 SourceLocation RParenLoc, 2884 SourceLocation LParenLoc, 2885 CXXRecordDecl *ClassDecl); 2886 2887 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 2888 CXXCtorInitializer **Initializers, 2889 unsigned NumInitializers, bool AnyErrors); 2890 2891 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 2892 2893 2894 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 2895 /// mark all the non-trivial destructors of its members and bases as 2896 /// referenced. 2897 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 2898 CXXRecordDecl *Record); 2899 2900 /// \brief The list of classes whose vtables have been used within 2901 /// this translation unit, and the source locations at which the 2902 /// first use occurred. 2903 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 2904 2905 /// \brief The list of vtables that are required but have not yet been 2906 /// materialized. 2907 llvm::SmallVector<VTableUse, 16> VTableUses; 2908 2909 /// \brief The set of classes whose vtables have been used within 2910 /// this translation unit, and a bit that will be true if the vtable is 2911 /// required to be emitted (otherwise, it should be emitted only if needed 2912 /// by code generation). 2913 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 2914 2915 /// \brief A list of all of the dynamic classes in this translation 2916 /// unit. 2917 llvm::SmallVector<CXXRecordDecl *, 16> DynamicClasses; 2918 2919 /// \brief Note that the vtable for the given class was used at the 2920 /// given location. 2921 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 2922 bool DefinitionRequired = false); 2923 2924 /// MarkVirtualMembersReferenced - Will mark all members of the given 2925 /// CXXRecordDecl referenced. 2926 void MarkVirtualMembersReferenced(SourceLocation Loc, 2927 const CXXRecordDecl *RD); 2928 2929 /// \brief Define all of the vtables that have been used in this 2930 /// translation unit and reference any virtual members used by those 2931 /// vtables. 2932 /// 2933 /// \returns true if any work was done, false otherwise. 2934 bool DefineUsedVTables(); 2935 2936 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 2937 2938 void ActOnMemInitializers(Decl *ConstructorDecl, 2939 SourceLocation ColonLoc, 2940 MemInitTy **MemInits, unsigned NumMemInits, 2941 bool AnyErrors); 2942 2943 void CheckCompletedCXXClass(CXXRecordDecl *Record); 2944 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 2945 Decl *TagDecl, 2946 SourceLocation LBrac, 2947 SourceLocation RBrac, 2948 AttributeList *AttrList); 2949 2950 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 2951 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 2952 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2953 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 2954 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 2955 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 2956 2957 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 2958 Expr *AssertExpr, 2959 Expr *AssertMessageExpr, 2960 SourceLocation RParenLoc); 2961 2962 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 2963 TypeSourceInfo *TSInfo); 2964 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 2965 MultiTemplateParamsArg TemplateParams); 2966 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 2967 MultiTemplateParamsArg TemplateParams); 2968 2969 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 2970 StorageClass& SC); 2971 void CheckConstructor(CXXConstructorDecl *Constructor); 2972 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 2973 StorageClass& SC); 2974 bool CheckDestructor(CXXDestructorDecl *Destructor); 2975 void CheckConversionDeclarator(Declarator &D, QualType &R, 2976 StorageClass& SC); 2977 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 2978 2979 //===--------------------------------------------------------------------===// 2980 // C++ Derived Classes 2981 // 2982 2983 /// ActOnBaseSpecifier - Parsed a base specifier 2984 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 2985 SourceRange SpecifierRange, 2986 bool Virtual, AccessSpecifier Access, 2987 TypeSourceInfo *TInfo, 2988 SourceLocation EllipsisLoc); 2989 2990 BaseResult ActOnBaseSpecifier(Decl *classdecl, 2991 SourceRange SpecifierRange, 2992 bool Virtual, AccessSpecifier Access, 2993 ParsedType basetype, 2994 SourceLocation BaseLoc, 2995 SourceLocation EllipsisLoc); 2996 2997 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 2998 unsigned NumBases); 2999 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3000 3001 bool IsDerivedFrom(QualType Derived, QualType Base); 3002 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3003 3004 // FIXME: I don't like this name. 3005 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3006 3007 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3008 3009 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3010 SourceLocation Loc, SourceRange Range, 3011 CXXCastPath *BasePath = 0, 3012 bool IgnoreAccess = false); 3013 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3014 unsigned InaccessibleBaseID, 3015 unsigned AmbigiousBaseConvID, 3016 SourceLocation Loc, SourceRange Range, 3017 DeclarationName Name, 3018 CXXCastPath *BasePath); 3019 3020 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3021 3022 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3023 /// covariant, according to C++ [class.virtual]p5. 3024 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3025 const CXXMethodDecl *Old); 3026 3027 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3028 /// spec is a subset of base spec. 3029 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3030 const CXXMethodDecl *Old); 3031 3032 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3033 3034 /// CheckOverrideControl - Check C++0x override control semantics. 3035 void CheckOverrideControl(const Decl *D); 3036 3037 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3038 /// overrides a virtual member function marked 'final', according to 3039 /// C++0x [class.virtual]p3. 3040 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3041 const CXXMethodDecl *Old); 3042 3043 3044 //===--------------------------------------------------------------------===// 3045 // C++ Access Control 3046 // 3047 3048 enum AccessResult { 3049 AR_accessible, 3050 AR_inaccessible, 3051 AR_dependent, 3052 AR_delayed 3053 }; 3054 3055 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3056 NamedDecl *PrevMemberDecl, 3057 AccessSpecifier LexicalAS); 3058 3059 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3060 DeclAccessPair FoundDecl); 3061 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3062 DeclAccessPair FoundDecl); 3063 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3064 SourceRange PlacementRange, 3065 CXXRecordDecl *NamingClass, 3066 DeclAccessPair FoundDecl); 3067 AccessResult CheckConstructorAccess(SourceLocation Loc, 3068 CXXConstructorDecl *D, 3069 const InitializedEntity &Entity, 3070 AccessSpecifier Access, 3071 bool IsCopyBindingRefToTemp = false); 3072 AccessResult CheckDestructorAccess(SourceLocation Loc, 3073 CXXDestructorDecl *Dtor, 3074 const PartialDiagnostic &PDiag); 3075 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3076 NamedDecl *D, 3077 const PartialDiagnostic &PDiag); 3078 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3079 Expr *ObjectExpr, 3080 Expr *ArgExpr, 3081 DeclAccessPair FoundDecl); 3082 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3083 DeclAccessPair FoundDecl); 3084 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3085 QualType Base, QualType Derived, 3086 const CXXBasePath &Path, 3087 unsigned DiagID, 3088 bool ForceCheck = false, 3089 bool ForceUnprivileged = false); 3090 void CheckLookupAccess(const LookupResult &R); 3091 3092 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3093 const MultiLevelTemplateArgumentList &TemplateArgs); 3094 void PerformDependentDiagnostics(const DeclContext *Pattern, 3095 const MultiLevelTemplateArgumentList &TemplateArgs); 3096 3097 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3098 3099 /// A flag to suppress access checking. 3100 bool SuppressAccessChecking; 3101 3102 /// \brief When true, access checking violations are treated as SFINAE 3103 /// failures rather than hard errors. 3104 bool AccessCheckingSFINAE; 3105 3106 void ActOnStartSuppressingAccessChecks(); 3107 void ActOnStopSuppressingAccessChecks(); 3108 3109 enum AbstractDiagSelID { 3110 AbstractNone = -1, 3111 AbstractReturnType, 3112 AbstractParamType, 3113 AbstractVariableType, 3114 AbstractFieldType, 3115 AbstractArrayType 3116 }; 3117 3118 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3119 const PartialDiagnostic &PD); 3120 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3121 3122 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3123 AbstractDiagSelID SelID = AbstractNone); 3124 3125 //===--------------------------------------------------------------------===// 3126 // C++ Overloaded Operators [C++ 13.5] 3127 // 3128 3129 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3130 3131 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3132 3133 //===--------------------------------------------------------------------===// 3134 // C++ Templates [C++ 14] 3135 // 3136 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3137 QualType ObjectType, bool EnteringContext, 3138 bool &MemberOfUnknownSpecialization); 3139 3140 TemplateNameKind isTemplateName(Scope *S, 3141 CXXScopeSpec &SS, 3142 bool hasTemplateKeyword, 3143 UnqualifiedId &Name, 3144 ParsedType ObjectType, 3145 bool EnteringContext, 3146 TemplateTy &Template, 3147 bool &MemberOfUnknownSpecialization); 3148 3149 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3150 SourceLocation IILoc, 3151 Scope *S, 3152 const CXXScopeSpec *SS, 3153 TemplateTy &SuggestedTemplate, 3154 TemplateNameKind &SuggestedKind); 3155 3156 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3157 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3158 3159 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3160 SourceLocation EllipsisLoc, 3161 SourceLocation KeyLoc, 3162 IdentifierInfo *ParamName, 3163 SourceLocation ParamNameLoc, 3164 unsigned Depth, unsigned Position, 3165 SourceLocation EqualLoc, 3166 ParsedType DefaultArg); 3167 3168 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3169 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3170 unsigned Depth, 3171 unsigned Position, 3172 SourceLocation EqualLoc, 3173 Expr *DefaultArg); 3174 Decl *ActOnTemplateTemplateParameter(Scope *S, 3175 SourceLocation TmpLoc, 3176 TemplateParamsTy *Params, 3177 SourceLocation EllipsisLoc, 3178 IdentifierInfo *ParamName, 3179 SourceLocation ParamNameLoc, 3180 unsigned Depth, 3181 unsigned Position, 3182 SourceLocation EqualLoc, 3183 ParsedTemplateArgument DefaultArg); 3184 3185 TemplateParamsTy * 3186 ActOnTemplateParameterList(unsigned Depth, 3187 SourceLocation ExportLoc, 3188 SourceLocation TemplateLoc, 3189 SourceLocation LAngleLoc, 3190 Decl **Params, unsigned NumParams, 3191 SourceLocation RAngleLoc); 3192 3193 /// \brief The context in which we are checking a template parameter 3194 /// list. 3195 enum TemplateParamListContext { 3196 TPC_ClassTemplate, 3197 TPC_FunctionTemplate, 3198 TPC_ClassTemplateMember, 3199 TPC_FriendFunctionTemplate, 3200 TPC_FriendFunctionTemplateDefinition 3201 }; 3202 3203 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3204 TemplateParameterList *OldParams, 3205 TemplateParamListContext TPC); 3206 TemplateParameterList * 3207 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3208 const CXXScopeSpec &SS, 3209 TemplateParameterList **ParamLists, 3210 unsigned NumParamLists, 3211 bool IsFriend, 3212 bool &IsExplicitSpecialization, 3213 bool &Invalid); 3214 3215 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3216 SourceLocation KWLoc, CXXScopeSpec &SS, 3217 IdentifierInfo *Name, SourceLocation NameLoc, 3218 AttributeList *Attr, 3219 TemplateParameterList *TemplateParams, 3220 AccessSpecifier AS, 3221 unsigned NumOuterTemplateParamLists, 3222 TemplateParameterList **OuterTemplateParamLists); 3223 3224 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3225 TemplateArgumentListInfo &Out); 3226 3227 void NoteAllFoundTemplates(TemplateName Name); 3228 3229 QualType CheckTemplateIdType(TemplateName Template, 3230 SourceLocation TemplateLoc, 3231 TemplateArgumentListInfo &TemplateArgs); 3232 3233 TypeResult 3234 ActOnTemplateIdType(CXXScopeSpec &SS, 3235 TemplateTy Template, SourceLocation TemplateLoc, 3236 SourceLocation LAngleLoc, 3237 ASTTemplateArgsPtr TemplateArgs, 3238 SourceLocation RAngleLoc); 3239 3240 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3241 /// such as \c class T::template apply<U>. 3242 /// 3243 /// \param TUK 3244 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3245 TypeSpecifierType TagSpec, 3246 SourceLocation TagLoc, 3247 CXXScopeSpec &SS, 3248 TemplateTy TemplateD, 3249 SourceLocation TemplateLoc, 3250 SourceLocation LAngleLoc, 3251 ASTTemplateArgsPtr TemplateArgsIn, 3252 SourceLocation RAngleLoc); 3253 3254 3255 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3256 LookupResult &R, 3257 bool RequiresADL, 3258 const TemplateArgumentListInfo &TemplateArgs); 3259 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3260 const DeclarationNameInfo &NameInfo, 3261 const TemplateArgumentListInfo &TemplateArgs); 3262 3263 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3264 SourceLocation TemplateKWLoc, 3265 CXXScopeSpec &SS, 3266 UnqualifiedId &Name, 3267 ParsedType ObjectType, 3268 bool EnteringContext, 3269 TemplateTy &Template); 3270 3271 DeclResult 3272 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3273 SourceLocation KWLoc, 3274 CXXScopeSpec &SS, 3275 TemplateTy Template, 3276 SourceLocation TemplateNameLoc, 3277 SourceLocation LAngleLoc, 3278 ASTTemplateArgsPtr TemplateArgs, 3279 SourceLocation RAngleLoc, 3280 AttributeList *Attr, 3281 MultiTemplateParamsArg TemplateParameterLists); 3282 3283 Decl *ActOnTemplateDeclarator(Scope *S, 3284 MultiTemplateParamsArg TemplateParameterLists, 3285 Declarator &D); 3286 3287 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3288 MultiTemplateParamsArg TemplateParameterLists, 3289 Declarator &D); 3290 3291 bool 3292 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3293 TemplateSpecializationKind NewTSK, 3294 NamedDecl *PrevDecl, 3295 TemplateSpecializationKind PrevTSK, 3296 SourceLocation PrevPtOfInstantiation, 3297 bool &SuppressNew); 3298 3299 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3300 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3301 LookupResult &Previous); 3302 3303 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3304 TemplateArgumentListInfo *ExplicitTemplateArgs, 3305 LookupResult &Previous); 3306 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3307 3308 DeclResult 3309 ActOnExplicitInstantiation(Scope *S, 3310 SourceLocation ExternLoc, 3311 SourceLocation TemplateLoc, 3312 unsigned TagSpec, 3313 SourceLocation KWLoc, 3314 const CXXScopeSpec &SS, 3315 TemplateTy Template, 3316 SourceLocation TemplateNameLoc, 3317 SourceLocation LAngleLoc, 3318 ASTTemplateArgsPtr TemplateArgs, 3319 SourceLocation RAngleLoc, 3320 AttributeList *Attr); 3321 3322 DeclResult 3323 ActOnExplicitInstantiation(Scope *S, 3324 SourceLocation ExternLoc, 3325 SourceLocation TemplateLoc, 3326 unsigned TagSpec, 3327 SourceLocation KWLoc, 3328 CXXScopeSpec &SS, 3329 IdentifierInfo *Name, 3330 SourceLocation NameLoc, 3331 AttributeList *Attr); 3332 3333 DeclResult ActOnExplicitInstantiation(Scope *S, 3334 SourceLocation ExternLoc, 3335 SourceLocation TemplateLoc, 3336 Declarator &D); 3337 3338 TemplateArgumentLoc 3339 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3340 SourceLocation TemplateLoc, 3341 SourceLocation RAngleLoc, 3342 Decl *Param, 3343 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3344 3345 /// \brief Specifies the context in which a particular template 3346 /// argument is being checked. 3347 enum CheckTemplateArgumentKind { 3348 /// \brief The template argument was specified in the code or was 3349 /// instantiated with some deduced template arguments. 3350 CTAK_Specified, 3351 3352 /// \brief The template argument was deduced via template argument 3353 /// deduction. 3354 CTAK_Deduced, 3355 3356 /// \brief The template argument was deduced from an array bound 3357 /// via template argument deduction. 3358 CTAK_DeducedFromArrayBound 3359 }; 3360 3361 bool CheckTemplateArgument(NamedDecl *Param, 3362 const TemplateArgumentLoc &Arg, 3363 NamedDecl *Template, 3364 SourceLocation TemplateLoc, 3365 SourceLocation RAngleLoc, 3366 unsigned ArgumentPackIndex, 3367 llvm::SmallVectorImpl<TemplateArgument> &Converted, 3368 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3369 3370 /// \brief Check that the given template arguments can be be provided to 3371 /// the given template, converting the arguments along the way. 3372 /// 3373 /// \param Template The template to which the template arguments are being 3374 /// provided. 3375 /// 3376 /// \param TemplateLoc The location of the template name in the source. 3377 /// 3378 /// \param TemplateArgs The list of template arguments. If the template is 3379 /// a template template parameter, this function may extend the set of 3380 /// template arguments to also include substituted, defaulted template 3381 /// arguments. 3382 /// 3383 /// \param PartialTemplateArgs True if the list of template arguments is 3384 /// intentionally partial, e.g., because we're checking just the initial 3385 /// set of template arguments. 3386 /// 3387 /// \param Converted Will receive the converted, canonicalized template 3388 /// arguments. 3389 /// 3390 /// \returns True if an error occurred, false otherwise. 3391 bool CheckTemplateArgumentList(TemplateDecl *Template, 3392 SourceLocation TemplateLoc, 3393 TemplateArgumentListInfo &TemplateArgs, 3394 bool PartialTemplateArgs, 3395 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3396 3397 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3398 const TemplateArgumentLoc &Arg, 3399 llvm::SmallVectorImpl<TemplateArgument> &Converted); 3400 3401 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3402 TypeSourceInfo *Arg); 3403 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3404 TemplateArgument &Converted); 3405 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3406 QualType InstantiatedParamType, Expr *Arg, 3407 TemplateArgument &Converted, 3408 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3409 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3410 const TemplateArgumentLoc &Arg); 3411 3412 ExprResult 3413 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3414 QualType ParamType, 3415 SourceLocation Loc); 3416 ExprResult 3417 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3418 SourceLocation Loc); 3419 3420 /// \brief Enumeration describing how template parameter lists are compared 3421 /// for equality. 3422 enum TemplateParameterListEqualKind { 3423 /// \brief We are matching the template parameter lists of two templates 3424 /// that might be redeclarations. 3425 /// 3426 /// \code 3427 /// template<typename T> struct X; 3428 /// template<typename T> struct X; 3429 /// \endcode 3430 TPL_TemplateMatch, 3431 3432 /// \brief We are matching the template parameter lists of two template 3433 /// template parameters as part of matching the template parameter lists 3434 /// of two templates that might be redeclarations. 3435 /// 3436 /// \code 3437 /// template<template<int I> class TT> struct X; 3438 /// template<template<int Value> class Other> struct X; 3439 /// \endcode 3440 TPL_TemplateTemplateParmMatch, 3441 3442 /// \brief We are matching the template parameter lists of a template 3443 /// template argument against the template parameter lists of a template 3444 /// template parameter. 3445 /// 3446 /// \code 3447 /// template<template<int Value> class Metafun> struct X; 3448 /// template<int Value> struct integer_c; 3449 /// X<integer_c> xic; 3450 /// \endcode 3451 TPL_TemplateTemplateArgumentMatch 3452 }; 3453 3454 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3455 TemplateParameterList *Old, 3456 bool Complain, 3457 TemplateParameterListEqualKind Kind, 3458 SourceLocation TemplateArgLoc 3459 = SourceLocation()); 3460 3461 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3462 3463 /// \brief Called when the parser has parsed a C++ typename 3464 /// specifier, e.g., "typename T::type". 3465 /// 3466 /// \param S The scope in which this typename type occurs. 3467 /// \param TypenameLoc the location of the 'typename' keyword 3468 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3469 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3470 /// \param IdLoc the location of the identifier. 3471 TypeResult 3472 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3473 const CXXScopeSpec &SS, const IdentifierInfo &II, 3474 SourceLocation IdLoc); 3475 3476 /// \brief Called when the parser has parsed a C++ typename 3477 /// specifier that ends in a template-id, e.g., 3478 /// "typename MetaFun::template apply<T1, T2>". 3479 /// 3480 /// \param S The scope in which this typename type occurs. 3481 /// \param TypenameLoc the location of the 'typename' keyword 3482 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3483 /// \param TemplateLoc the location of the 'template' keyword, if any. 3484 /// \param TemplateName The template name. 3485 /// \param TemplateNameLoc The location of the template name. 3486 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3487 /// \param TemplateArgs The template arguments. 3488 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3489 TypeResult 3490 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3491 const CXXScopeSpec &SS, 3492 SourceLocation TemplateLoc, 3493 TemplateTy Template, 3494 SourceLocation TemplateNameLoc, 3495 SourceLocation LAngleLoc, 3496 ASTTemplateArgsPtr TemplateArgs, 3497 SourceLocation RAngleLoc); 3498 3499 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3500 SourceLocation KeywordLoc, 3501 NestedNameSpecifierLoc QualifierLoc, 3502 const IdentifierInfo &II, 3503 SourceLocation IILoc); 3504 3505 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3506 SourceLocation Loc, 3507 DeclarationName Name); 3508 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3509 3510 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3511 3512 std::string 3513 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3514 const TemplateArgumentList &Args); 3515 3516 std::string 3517 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3518 const TemplateArgument *Args, 3519 unsigned NumArgs); 3520 3521 //===--------------------------------------------------------------------===// 3522 // C++ Variadic Templates (C++0x [temp.variadic]) 3523 //===--------------------------------------------------------------------===// 3524 3525 /// \brief The context in which an unexpanded parameter pack is 3526 /// being diagnosed. 3527 /// 3528 /// Note that the values of this enumeration line up with the first 3529 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3530 enum UnexpandedParameterPackContext { 3531 /// \brief An arbitrary expression. 3532 UPPC_Expression = 0, 3533 3534 /// \brief The base type of a class type. 3535 UPPC_BaseType, 3536 3537 /// \brief The type of an arbitrary declaration. 3538 UPPC_DeclarationType, 3539 3540 /// \brief The type of a data member. 3541 UPPC_DataMemberType, 3542 3543 /// \brief The size of a bit-field. 3544 UPPC_BitFieldWidth, 3545 3546 /// \brief The expression in a static assertion. 3547 UPPC_StaticAssertExpression, 3548 3549 /// \brief The fixed underlying type of an enumeration. 3550 UPPC_FixedUnderlyingType, 3551 3552 /// \brief The enumerator value. 3553 UPPC_EnumeratorValue, 3554 3555 /// \brief A using declaration. 3556 UPPC_UsingDeclaration, 3557 3558 /// \brief A friend declaration. 3559 UPPC_FriendDeclaration, 3560 3561 /// \brief A declaration qualifier. 3562 UPPC_DeclarationQualifier, 3563 3564 /// \brief An initializer. 3565 UPPC_Initializer, 3566 3567 /// \brief A default argument. 3568 UPPC_DefaultArgument, 3569 3570 /// \brief The type of a non-type template parameter. 3571 UPPC_NonTypeTemplateParameterType, 3572 3573 /// \brief The type of an exception. 3574 UPPC_ExceptionType, 3575 3576 /// \brief Partial specialization. 3577 UPPC_PartialSpecialization 3578 }; 3579 3580 /// \brief If the given type contains an unexpanded parameter pack, 3581 /// diagnose the error. 3582 /// 3583 /// \param Loc The source location where a diagnostc should be emitted. 3584 /// 3585 /// \param T The type that is being checked for unexpanded parameter 3586 /// packs. 3587 /// 3588 /// \returns true if an error ocurred, false otherwise. 3589 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 3590 UnexpandedParameterPackContext UPPC); 3591 3592 /// \brief If the given expression contains an unexpanded parameter 3593 /// pack, diagnose the error. 3594 /// 3595 /// \param E The expression that is being checked for unexpanded 3596 /// parameter packs. 3597 /// 3598 /// \returns true if an error ocurred, false otherwise. 3599 bool DiagnoseUnexpandedParameterPack(Expr *E, 3600 UnexpandedParameterPackContext UPPC = UPPC_Expression); 3601 3602 /// \brief If the given nested-name-specifier contains an unexpanded 3603 /// parameter pack, diagnose the error. 3604 /// 3605 /// \param SS The nested-name-specifier that is being checked for 3606 /// unexpanded parameter packs. 3607 /// 3608 /// \returns true if an error ocurred, false otherwise. 3609 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 3610 UnexpandedParameterPackContext UPPC); 3611 3612 /// \brief If the given name contains an unexpanded parameter pack, 3613 /// diagnose the error. 3614 /// 3615 /// \param NameInfo The name (with source location information) that 3616 /// is being checked for unexpanded parameter packs. 3617 /// 3618 /// \returns true if an error ocurred, false otherwise. 3619 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 3620 UnexpandedParameterPackContext UPPC); 3621 3622 /// \brief If the given template name contains an unexpanded parameter pack, 3623 /// diagnose the error. 3624 /// 3625 /// \param Loc The location of the template name. 3626 /// 3627 /// \param Template The template name that is being checked for unexpanded 3628 /// parameter packs. 3629 /// 3630 /// \returns true if an error ocurred, false otherwise. 3631 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 3632 TemplateName Template, 3633 UnexpandedParameterPackContext UPPC); 3634 3635 /// \brief If the given template argument contains an unexpanded parameter 3636 /// pack, diagnose the error. 3637 /// 3638 /// \param Arg The template argument that is being checked for unexpanded 3639 /// parameter packs. 3640 /// 3641 /// \returns true if an error ocurred, false otherwise. 3642 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 3643 UnexpandedParameterPackContext UPPC); 3644 3645 /// \brief Collect the set of unexpanded parameter packs within the given 3646 /// template argument. 3647 /// 3648 /// \param Arg The template argument that will be traversed to find 3649 /// unexpanded parameter packs. 3650 void collectUnexpandedParameterPacks(TemplateArgument Arg, 3651 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3652 3653 /// \brief Collect the set of unexpanded parameter packs within the given 3654 /// template argument. 3655 /// 3656 /// \param Arg The template argument that will be traversed to find 3657 /// unexpanded parameter packs. 3658 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 3659 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3660 3661 /// \brief Collect the set of unexpanded parameter packs within the given 3662 /// type. 3663 /// 3664 /// \param T The type that will be traversed to find 3665 /// unexpanded parameter packs. 3666 void collectUnexpandedParameterPacks(QualType T, 3667 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3668 3669 /// \brief Collect the set of unexpanded parameter packs within the given 3670 /// type. 3671 /// 3672 /// \param TL The type that will be traversed to find 3673 /// unexpanded parameter packs. 3674 void collectUnexpandedParameterPacks(TypeLoc TL, 3675 llvm::SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 3676 3677 /// \brief Invoked when parsing a template argument followed by an 3678 /// ellipsis, which creates a pack expansion. 3679 /// 3680 /// \param Arg The template argument preceding the ellipsis, which 3681 /// may already be invalid. 3682 /// 3683 /// \param EllipsisLoc The location of the ellipsis. 3684 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 3685 SourceLocation EllipsisLoc); 3686 3687 /// \brief Invoked when parsing a type followed by an ellipsis, which 3688 /// creates a pack expansion. 3689 /// 3690 /// \param Type The type preceding the ellipsis, which will become 3691 /// the pattern of the pack expansion. 3692 /// 3693 /// \param EllipsisLoc The location of the ellipsis. 3694 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 3695 3696 /// \brief Construct a pack expansion type from the pattern of the pack 3697 /// expansion. 3698 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 3699 SourceLocation EllipsisLoc, 3700 llvm::Optional<unsigned> NumExpansions); 3701 3702 /// \brief Construct a pack expansion type from the pattern of the pack 3703 /// expansion. 3704 QualType CheckPackExpansion(QualType Pattern, 3705 SourceRange PatternRange, 3706 SourceLocation EllipsisLoc, 3707 llvm::Optional<unsigned> NumExpansions); 3708 3709 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3710 /// creates a pack expansion. 3711 /// 3712 /// \param Pattern The expression preceding the ellipsis, which will become 3713 /// the pattern of the pack expansion. 3714 /// 3715 /// \param EllipsisLoc The location of the ellipsis. 3716 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 3717 3718 /// \brief Invoked when parsing an expression followed by an ellipsis, which 3719 /// creates a pack expansion. 3720 /// 3721 /// \param Pattern The expression preceding the ellipsis, which will become 3722 /// the pattern of the pack expansion. 3723 /// 3724 /// \param EllipsisLoc The location of the ellipsis. 3725 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 3726 llvm::Optional<unsigned> NumExpansions); 3727 3728 /// \brief Determine whether we could expand a pack expansion with the 3729 /// given set of parameter packs into separate arguments by repeatedly 3730 /// transforming the pattern. 3731 /// 3732 /// \param EllipsisLoc The location of the ellipsis that identifies the 3733 /// pack expansion. 3734 /// 3735 /// \param PatternRange The source range that covers the entire pattern of 3736 /// the pack expansion. 3737 /// 3738 /// \param Unexpanded The set of unexpanded parameter packs within the 3739 /// pattern. 3740 /// 3741 /// \param NumUnexpanded The number of unexpanded parameter packs in 3742 /// \p Unexpanded. 3743 /// 3744 /// \param ShouldExpand Will be set to \c true if the transformer should 3745 /// expand the corresponding pack expansions into separate arguments. When 3746 /// set, \c NumExpansions must also be set. 3747 /// 3748 /// \param RetainExpansion Whether the caller should add an unexpanded 3749 /// pack expansion after all of the expanded arguments. This is used 3750 /// when extending explicitly-specified template argument packs per 3751 /// C++0x [temp.arg.explicit]p9. 3752 /// 3753 /// \param NumExpansions The number of separate arguments that will be in 3754 /// the expanded form of the corresponding pack expansion. This is both an 3755 /// input and an output parameter, which can be set by the caller if the 3756 /// number of expansions is known a priori (e.g., due to a prior substitution) 3757 /// and will be set by the callee when the number of expansions is known. 3758 /// The callee must set this value when \c ShouldExpand is \c true; it may 3759 /// set this value in other cases. 3760 /// 3761 /// \returns true if an error occurred (e.g., because the parameter packs 3762 /// are to be instantiated with arguments of different lengths), false 3763 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 3764 /// must be set. 3765 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 3766 SourceRange PatternRange, 3767 const UnexpandedParameterPack *Unexpanded, 3768 unsigned NumUnexpanded, 3769 const MultiLevelTemplateArgumentList &TemplateArgs, 3770 bool &ShouldExpand, 3771 bool &RetainExpansion, 3772 llvm::Optional<unsigned> &NumExpansions); 3773 3774 /// \brief Determine the number of arguments in the given pack expansion 3775 /// type. 3776 /// 3777 /// This routine already assumes that the pack expansion type can be 3778 /// expanded and that the number of arguments in the expansion is 3779 /// consistent across all of the unexpanded parameter packs in its pattern. 3780 unsigned getNumArgumentsInExpansion(QualType T, 3781 const MultiLevelTemplateArgumentList &TemplateArgs); 3782 3783 /// \brief Determine whether the given declarator contains any unexpanded 3784 /// parameter packs. 3785 /// 3786 /// This routine is used by the parser to disambiguate function declarators 3787 /// with an ellipsis prior to the ')', e.g., 3788 /// 3789 /// \code 3790 /// void f(T...); 3791 /// \endcode 3792 /// 3793 /// To determine whether we have an (unnamed) function parameter pack or 3794 /// a variadic function. 3795 /// 3796 /// \returns true if the declarator contains any unexpanded parameter packs, 3797 /// false otherwise. 3798 bool containsUnexpandedParameterPacks(Declarator &D); 3799 3800 //===--------------------------------------------------------------------===// 3801 // C++ Template Argument Deduction (C++ [temp.deduct]) 3802 //===--------------------------------------------------------------------===// 3803 3804 /// \brief Describes the result of template argument deduction. 3805 /// 3806 /// The TemplateDeductionResult enumeration describes the result of 3807 /// template argument deduction, as returned from 3808 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 3809 /// structure provides additional information about the results of 3810 /// template argument deduction, e.g., the deduced template argument 3811 /// list (if successful) or the specific template parameters or 3812 /// deduced arguments that were involved in the failure. 3813 enum TemplateDeductionResult { 3814 /// \brief Template argument deduction was successful. 3815 TDK_Success = 0, 3816 /// \brief Template argument deduction exceeded the maximum template 3817 /// instantiation depth (which has already been diagnosed). 3818 TDK_InstantiationDepth, 3819 /// \brief Template argument deduction did not deduce a value 3820 /// for every template parameter. 3821 TDK_Incomplete, 3822 /// \brief Template argument deduction produced inconsistent 3823 /// deduced values for the given template parameter. 3824 TDK_Inconsistent, 3825 /// \brief Template argument deduction failed due to inconsistent 3826 /// cv-qualifiers on a template parameter type that would 3827 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 3828 /// but were given a non-const "X". 3829 TDK_Underqualified, 3830 /// \brief Substitution of the deduced template argument values 3831 /// resulted in an error. 3832 TDK_SubstitutionFailure, 3833 /// \brief Substitution of the deduced template argument values 3834 /// into a non-deduced context produced a type or value that 3835 /// produces a type that does not match the original template 3836 /// arguments provided. 3837 TDK_NonDeducedMismatch, 3838 /// \brief When performing template argument deduction for a function 3839 /// template, there were too many call arguments. 3840 TDK_TooManyArguments, 3841 /// \brief When performing template argument deduction for a function 3842 /// template, there were too few call arguments. 3843 TDK_TooFewArguments, 3844 /// \brief The explicitly-specified template arguments were not valid 3845 /// template arguments for the given template. 3846 TDK_InvalidExplicitArguments, 3847 /// \brief The arguments included an overloaded function name that could 3848 /// not be resolved to a suitable function. 3849 TDK_FailedOverloadResolution 3850 }; 3851 3852 TemplateDeductionResult 3853 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 3854 const TemplateArgumentList &TemplateArgs, 3855 sema::TemplateDeductionInfo &Info); 3856 3857 TemplateDeductionResult 3858 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3859 TemplateArgumentListInfo &ExplicitTemplateArgs, 3860 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3861 llvm::SmallVectorImpl<QualType> &ParamTypes, 3862 QualType *FunctionType, 3863 sema::TemplateDeductionInfo &Info); 3864 3865 TemplateDeductionResult 3866 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 3867 llvm::SmallVectorImpl<DeducedTemplateArgument> &Deduced, 3868 unsigned NumExplicitlySpecified, 3869 FunctionDecl *&Specialization, 3870 sema::TemplateDeductionInfo &Info); 3871 3872 TemplateDeductionResult 3873 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3874 TemplateArgumentListInfo *ExplicitTemplateArgs, 3875 Expr **Args, unsigned NumArgs, 3876 FunctionDecl *&Specialization, 3877 sema::TemplateDeductionInfo &Info); 3878 3879 TemplateDeductionResult 3880 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3881 TemplateArgumentListInfo *ExplicitTemplateArgs, 3882 QualType ArgFunctionType, 3883 FunctionDecl *&Specialization, 3884 sema::TemplateDeductionInfo &Info); 3885 3886 TemplateDeductionResult 3887 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3888 QualType ToType, 3889 CXXConversionDecl *&Specialization, 3890 sema::TemplateDeductionInfo &Info); 3891 3892 TemplateDeductionResult 3893 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 3894 TemplateArgumentListInfo *ExplicitTemplateArgs, 3895 FunctionDecl *&Specialization, 3896 sema::TemplateDeductionInfo &Info); 3897 3898 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 3899 TypeSourceInfo *&Result); 3900 3901 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 3902 FunctionTemplateDecl *FT2, 3903 SourceLocation Loc, 3904 TemplatePartialOrderingContext TPOC, 3905 unsigned NumCallArguments); 3906 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 3907 UnresolvedSetIterator SEnd, 3908 TemplatePartialOrderingContext TPOC, 3909 unsigned NumCallArguments, 3910 SourceLocation Loc, 3911 const PartialDiagnostic &NoneDiag, 3912 const PartialDiagnostic &AmbigDiag, 3913 const PartialDiagnostic &CandidateDiag, 3914 bool Complain = true); 3915 3916 ClassTemplatePartialSpecializationDecl * 3917 getMoreSpecializedPartialSpecialization( 3918 ClassTemplatePartialSpecializationDecl *PS1, 3919 ClassTemplatePartialSpecializationDecl *PS2, 3920 SourceLocation Loc); 3921 3922 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 3923 bool OnlyDeduced, 3924 unsigned Depth, 3925 llvm::SmallVectorImpl<bool> &Used); 3926 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 3927 llvm::SmallVectorImpl<bool> &Deduced); 3928 3929 //===--------------------------------------------------------------------===// 3930 // C++ Template Instantiation 3931 // 3932 3933 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 3934 const TemplateArgumentList *Innermost = 0, 3935 bool RelativeToPrimary = false, 3936 const FunctionDecl *Pattern = 0); 3937 3938 /// \brief A template instantiation that is currently in progress. 3939 struct ActiveTemplateInstantiation { 3940 /// \brief The kind of template instantiation we are performing 3941 enum InstantiationKind { 3942 /// We are instantiating a template declaration. The entity is 3943 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 3944 TemplateInstantiation, 3945 3946 /// We are instantiating a default argument for a template 3947 /// parameter. The Entity is the template, and 3948 /// TemplateArgs/NumTemplateArguments provides the template 3949 /// arguments as specified. 3950 /// FIXME: Use a TemplateArgumentList 3951 DefaultTemplateArgumentInstantiation, 3952 3953 /// We are instantiating a default argument for a function. 3954 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 3955 /// provides the template arguments as specified. 3956 DefaultFunctionArgumentInstantiation, 3957 3958 /// We are substituting explicit template arguments provided for 3959 /// a function template. The entity is a FunctionTemplateDecl. 3960 ExplicitTemplateArgumentSubstitution, 3961 3962 /// We are substituting template argument determined as part of 3963 /// template argument deduction for either a class template 3964 /// partial specialization or a function template. The 3965 /// Entity is either a ClassTemplatePartialSpecializationDecl or 3966 /// a FunctionTemplateDecl. 3967 DeducedTemplateArgumentSubstitution, 3968 3969 /// We are substituting prior template arguments into a new 3970 /// template parameter. The template parameter itself is either a 3971 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 3972 PriorTemplateArgumentSubstitution, 3973 3974 /// We are checking the validity of a default template argument that 3975 /// has been used when naming a template-id. 3976 DefaultTemplateArgumentChecking 3977 } Kind; 3978 3979 /// \brief The point of instantiation within the source code. 3980 SourceLocation PointOfInstantiation; 3981 3982 /// \brief The template (or partial specialization) in which we are 3983 /// performing the instantiation, for substitutions of prior template 3984 /// arguments. 3985 NamedDecl *Template; 3986 3987 /// \brief The entity that is being instantiated. 3988 uintptr_t Entity; 3989 3990 /// \brief The list of template arguments we are substituting, if they 3991 /// are not part of the entity. 3992 const TemplateArgument *TemplateArgs; 3993 3994 /// \brief The number of template arguments in TemplateArgs. 3995 unsigned NumTemplateArgs; 3996 3997 /// \brief The template deduction info object associated with the 3998 /// substitution or checking of explicit or deduced template arguments. 3999 sema::TemplateDeductionInfo *DeductionInfo; 4000 4001 /// \brief The source range that covers the construct that cause 4002 /// the instantiation, e.g., the template-id that causes a class 4003 /// template instantiation. 4004 SourceRange InstantiationRange; 4005 4006 ActiveTemplateInstantiation() 4007 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4008 NumTemplateArgs(0), DeductionInfo(0) {} 4009 4010 /// \brief Determines whether this template is an actual instantiation 4011 /// that should be counted toward the maximum instantiation depth. 4012 bool isInstantiationRecord() const; 4013 4014 friend bool operator==(const ActiveTemplateInstantiation &X, 4015 const ActiveTemplateInstantiation &Y) { 4016 if (X.Kind != Y.Kind) 4017 return false; 4018 4019 if (X.Entity != Y.Entity) 4020 return false; 4021 4022 switch (X.Kind) { 4023 case TemplateInstantiation: 4024 return true; 4025 4026 case PriorTemplateArgumentSubstitution: 4027 case DefaultTemplateArgumentChecking: 4028 if (X.Template != Y.Template) 4029 return false; 4030 4031 // Fall through 4032 4033 case DefaultTemplateArgumentInstantiation: 4034 case ExplicitTemplateArgumentSubstitution: 4035 case DeducedTemplateArgumentSubstitution: 4036 case DefaultFunctionArgumentInstantiation: 4037 return X.TemplateArgs == Y.TemplateArgs; 4038 4039 } 4040 4041 return true; 4042 } 4043 4044 friend bool operator!=(const ActiveTemplateInstantiation &X, 4045 const ActiveTemplateInstantiation &Y) { 4046 return !(X == Y); 4047 } 4048 }; 4049 4050 /// \brief List of active template instantiations. 4051 /// 4052 /// This vector is treated as a stack. As one template instantiation 4053 /// requires another template instantiation, additional 4054 /// instantiations are pushed onto the stack up to a 4055 /// user-configurable limit LangOptions::InstantiationDepth. 4056 llvm::SmallVector<ActiveTemplateInstantiation, 16> 4057 ActiveTemplateInstantiations; 4058 4059 /// \brief Whether we are in a SFINAE context that is not associated with 4060 /// template instantiation. 4061 /// 4062 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4063 /// of a template instantiation or template argument deduction. 4064 bool InNonInstantiationSFINAEContext; 4065 4066 /// \brief The number of ActiveTemplateInstantiation entries in 4067 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4068 /// therefore, should not be counted as part of the instantiation depth. 4069 unsigned NonInstantiationEntries; 4070 4071 /// \brief The last template from which a template instantiation 4072 /// error or warning was produced. 4073 /// 4074 /// This value is used to suppress printing of redundant template 4075 /// instantiation backtraces when there are multiple errors in the 4076 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4077 /// to implement it anywhere else. 4078 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4079 4080 /// \brief The current index into pack expansion arguments that will be 4081 /// used for substitution of parameter packs. 4082 /// 4083 /// The pack expansion index will be -1 to indicate that parameter packs 4084 /// should be instantiated as themselves. Otherwise, the index specifies 4085 /// which argument within the parameter pack will be used for substitution. 4086 int ArgumentPackSubstitutionIndex; 4087 4088 /// \brief RAII object used to change the argument pack substitution index 4089 /// within a \c Sema object. 4090 /// 4091 /// See \c ArgumentPackSubstitutionIndex for more information. 4092 class ArgumentPackSubstitutionIndexRAII { 4093 Sema &Self; 4094 int OldSubstitutionIndex; 4095 4096 public: 4097 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4098 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4099 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4100 } 4101 4102 ~ArgumentPackSubstitutionIndexRAII() { 4103 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4104 } 4105 }; 4106 4107 friend class ArgumentPackSubstitutionRAII; 4108 4109 /// \brief The stack of calls expression undergoing template instantiation. 4110 /// 4111 /// The top of this stack is used by a fixit instantiating unresolved 4112 /// function calls to fix the AST to match the textual change it prints. 4113 llvm::SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4114 4115 /// \brief For each declaration that involved template argument deduction, the 4116 /// set of diagnostics that were suppressed during that template argument 4117 /// deduction. 4118 /// 4119 /// FIXME: Serialize this structure to the AST file. 4120 llvm::DenseMap<Decl *, llvm::SmallVector<PartialDiagnosticAt, 1> > 4121 SuppressedDiagnostics; 4122 4123 /// \brief A stack object to be created when performing template 4124 /// instantiation. 4125 /// 4126 /// Construction of an object of type \c InstantiatingTemplate 4127 /// pushes the current instantiation onto the stack of active 4128 /// instantiations. If the size of this stack exceeds the maximum 4129 /// number of recursive template instantiations, construction 4130 /// produces an error and evaluates true. 4131 /// 4132 /// Destruction of this object will pop the named instantiation off 4133 /// the stack. 4134 struct InstantiatingTemplate { 4135 /// \brief Note that we are instantiating a class template, 4136 /// function template, or a member thereof. 4137 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4138 Decl *Entity, 4139 SourceRange InstantiationRange = SourceRange()); 4140 4141 /// \brief Note that we are instantiating a default argument in a 4142 /// template-id. 4143 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4144 TemplateDecl *Template, 4145 const TemplateArgument *TemplateArgs, 4146 unsigned NumTemplateArgs, 4147 SourceRange InstantiationRange = SourceRange()); 4148 4149 /// \brief Note that we are instantiating a default argument in a 4150 /// template-id. 4151 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4152 FunctionTemplateDecl *FunctionTemplate, 4153 const TemplateArgument *TemplateArgs, 4154 unsigned NumTemplateArgs, 4155 ActiveTemplateInstantiation::InstantiationKind Kind, 4156 sema::TemplateDeductionInfo &DeductionInfo, 4157 SourceRange InstantiationRange = SourceRange()); 4158 4159 /// \brief Note that we are instantiating as part of template 4160 /// argument deduction for a class template partial 4161 /// specialization. 4162 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4163 ClassTemplatePartialSpecializationDecl *PartialSpec, 4164 const TemplateArgument *TemplateArgs, 4165 unsigned NumTemplateArgs, 4166 sema::TemplateDeductionInfo &DeductionInfo, 4167 SourceRange InstantiationRange = SourceRange()); 4168 4169 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4170 ParmVarDecl *Param, 4171 const TemplateArgument *TemplateArgs, 4172 unsigned NumTemplateArgs, 4173 SourceRange InstantiationRange = SourceRange()); 4174 4175 /// \brief Note that we are substituting prior template arguments into a 4176 /// non-type or template template parameter. 4177 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4178 NamedDecl *Template, 4179 NonTypeTemplateParmDecl *Param, 4180 const TemplateArgument *TemplateArgs, 4181 unsigned NumTemplateArgs, 4182 SourceRange InstantiationRange); 4183 4184 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4185 NamedDecl *Template, 4186 TemplateTemplateParmDecl *Param, 4187 const TemplateArgument *TemplateArgs, 4188 unsigned NumTemplateArgs, 4189 SourceRange InstantiationRange); 4190 4191 /// \brief Note that we are checking the default template argument 4192 /// against the template parameter for a given template-id. 4193 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4194 TemplateDecl *Template, 4195 NamedDecl *Param, 4196 const TemplateArgument *TemplateArgs, 4197 unsigned NumTemplateArgs, 4198 SourceRange InstantiationRange); 4199 4200 4201 /// \brief Note that we have finished instantiating this template. 4202 void Clear(); 4203 4204 ~InstantiatingTemplate() { Clear(); } 4205 4206 /// \brief Determines whether we have exceeded the maximum 4207 /// recursive template instantiations. 4208 operator bool() const { return Invalid; } 4209 4210 private: 4211 Sema &SemaRef; 4212 bool Invalid; 4213 bool SavedInNonInstantiationSFINAEContext; 4214 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4215 SourceRange InstantiationRange); 4216 4217 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4218 4219 InstantiatingTemplate& 4220 operator=(const InstantiatingTemplate&); // not implemented 4221 }; 4222 4223 void PrintInstantiationStack(); 4224 4225 /// \brief Determines whether we are currently in a context where 4226 /// template argument substitution failures are not considered 4227 /// errors. 4228 /// 4229 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4230 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4231 /// template-deduction context object, which can be used to capture 4232 /// diagnostics that will be suppressed. 4233 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4234 4235 /// \brief RAII class used to determine whether SFINAE has 4236 /// trapped any errors that occur during template argument 4237 /// deduction.` 4238 class SFINAETrap { 4239 Sema &SemaRef; 4240 unsigned PrevSFINAEErrors; 4241 bool PrevInNonInstantiationSFINAEContext; 4242 bool PrevAccessCheckingSFINAE; 4243 4244 public: 4245 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4246 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4247 PrevInNonInstantiationSFINAEContext( 4248 SemaRef.InNonInstantiationSFINAEContext), 4249 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4250 { 4251 if (!SemaRef.isSFINAEContext()) 4252 SemaRef.InNonInstantiationSFINAEContext = true; 4253 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4254 } 4255 4256 ~SFINAETrap() { 4257 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4258 SemaRef.InNonInstantiationSFINAEContext 4259 = PrevInNonInstantiationSFINAEContext; 4260 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4261 } 4262 4263 /// \brief Determine whether any SFINAE errors have been trapped. 4264 bool hasErrorOccurred() const { 4265 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4266 } 4267 }; 4268 4269 /// \brief The current instantiation scope used to store local 4270 /// variables. 4271 LocalInstantiationScope *CurrentInstantiationScope; 4272 4273 /// \brief The number of typos corrected by CorrectTypo. 4274 unsigned TyposCorrected; 4275 4276 typedef llvm::DenseMap<IdentifierInfo *, std::pair<llvm::StringRef, bool> > 4277 UnqualifiedTyposCorrectedMap; 4278 4279 /// \brief A cache containing the results of typo correction for unqualified 4280 /// name lookup. 4281 /// 4282 /// The string is the string that we corrected to (which may be empty, if 4283 /// there was no correction), while the boolean will be true when the 4284 /// string represents a keyword. 4285 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4286 4287 /// \brief Worker object for performing CFG-based warnings. 4288 sema::AnalysisBasedWarnings AnalysisWarnings; 4289 4290 /// \brief An entity for which implicit template instantiation is required. 4291 /// 4292 /// The source location associated with the declaration is the first place in 4293 /// the source code where the declaration was "used". It is not necessarily 4294 /// the point of instantiation (which will be either before or after the 4295 /// namespace-scope declaration that triggered this implicit instantiation), 4296 /// However, it is the location that diagnostics should generally refer to, 4297 /// because users will need to know what code triggered the instantiation. 4298 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4299 4300 /// \brief The queue of implicit template instantiations that are required 4301 /// but have not yet been performed. 4302 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4303 4304 /// \brief The queue of implicit template instantiations that are required 4305 /// and must be performed within the current local scope. 4306 /// 4307 /// This queue is only used for member functions of local classes in 4308 /// templates, which must be instantiated in the same scope as their 4309 /// enclosing function, so that they can reference function-local 4310 /// types, static variables, enumerators, etc. 4311 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4312 4313 void PerformPendingInstantiations(bool LocalOnly = false); 4314 4315 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4316 const MultiLevelTemplateArgumentList &TemplateArgs, 4317 SourceLocation Loc, DeclarationName Entity); 4318 4319 QualType SubstType(QualType T, 4320 const MultiLevelTemplateArgumentList &TemplateArgs, 4321 SourceLocation Loc, DeclarationName Entity); 4322 4323 TypeSourceInfo *SubstType(TypeLoc TL, 4324 const MultiLevelTemplateArgumentList &TemplateArgs, 4325 SourceLocation Loc, DeclarationName Entity); 4326 4327 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4328 const MultiLevelTemplateArgumentList &TemplateArgs, 4329 SourceLocation Loc, 4330 DeclarationName Entity); 4331 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4332 const MultiLevelTemplateArgumentList &TemplateArgs, 4333 llvm::Optional<unsigned> NumExpansions); 4334 bool SubstParmTypes(SourceLocation Loc, 4335 ParmVarDecl **Params, unsigned NumParams, 4336 const MultiLevelTemplateArgumentList &TemplateArgs, 4337 llvm::SmallVectorImpl<QualType> &ParamTypes, 4338 llvm::SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4339 ExprResult SubstExpr(Expr *E, 4340 const MultiLevelTemplateArgumentList &TemplateArgs); 4341 4342 /// \brief Substitute the given template arguments into a list of 4343 /// expressions, expanding pack expansions if required. 4344 /// 4345 /// \param Exprs The list of expressions to substitute into. 4346 /// 4347 /// \param NumExprs The number of expressions in \p Exprs. 4348 /// 4349 /// \param IsCall Whether this is some form of call, in which case 4350 /// default arguments will be dropped. 4351 /// 4352 /// \param TemplateArgs The set of template arguments to substitute. 4353 /// 4354 /// \param Outputs Will receive all of the substituted arguments. 4355 /// 4356 /// \returns true if an error occurred, false otherwise. 4357 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4358 const MultiLevelTemplateArgumentList &TemplateArgs, 4359 llvm::SmallVectorImpl<Expr *> &Outputs); 4360 4361 StmtResult SubstStmt(Stmt *S, 4362 const MultiLevelTemplateArgumentList &TemplateArgs); 4363 4364 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4365 const MultiLevelTemplateArgumentList &TemplateArgs); 4366 4367 bool 4368 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4369 CXXRecordDecl *Pattern, 4370 const MultiLevelTemplateArgumentList &TemplateArgs); 4371 4372 bool 4373 InstantiateClass(SourceLocation PointOfInstantiation, 4374 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4375 const MultiLevelTemplateArgumentList &TemplateArgs, 4376 TemplateSpecializationKind TSK, 4377 bool Complain = true); 4378 4379 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4380 Decl *Pattern, Decl *Inst); 4381 4382 bool 4383 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4384 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4385 TemplateSpecializationKind TSK, 4386 bool Complain = true); 4387 4388 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4389 CXXRecordDecl *Instantiation, 4390 const MultiLevelTemplateArgumentList &TemplateArgs, 4391 TemplateSpecializationKind TSK); 4392 4393 void InstantiateClassTemplateSpecializationMembers( 4394 SourceLocation PointOfInstantiation, 4395 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4396 TemplateSpecializationKind TSK); 4397 4398 NestedNameSpecifierLoc 4399 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4400 const MultiLevelTemplateArgumentList &TemplateArgs); 4401 4402 DeclarationNameInfo 4403 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4404 const MultiLevelTemplateArgumentList &TemplateArgs); 4405 TemplateName 4406 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4407 SourceLocation Loc, 4408 const MultiLevelTemplateArgumentList &TemplateArgs); 4409 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4410 TemplateArgumentListInfo &Result, 4411 const MultiLevelTemplateArgumentList &TemplateArgs); 4412 4413 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4414 FunctionDecl *Function, 4415 bool Recursive = false, 4416 bool DefinitionRequired = false); 4417 void InstantiateStaticDataMemberDefinition( 4418 SourceLocation PointOfInstantiation, 4419 VarDecl *Var, 4420 bool Recursive = false, 4421 bool DefinitionRequired = false); 4422 4423 void InstantiateMemInitializers(CXXConstructorDecl *New, 4424 const CXXConstructorDecl *Tmpl, 4425 const MultiLevelTemplateArgumentList &TemplateArgs); 4426 4427 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4428 const MultiLevelTemplateArgumentList &TemplateArgs); 4429 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4430 const MultiLevelTemplateArgumentList &TemplateArgs); 4431 4432 // Objective-C declarations. 4433 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4434 IdentifierInfo *ClassName, 4435 SourceLocation ClassLoc, 4436 IdentifierInfo *SuperName, 4437 SourceLocation SuperLoc, 4438 Decl * const *ProtoRefs, 4439 unsigned NumProtoRefs, 4440 const SourceLocation *ProtoLocs, 4441 SourceLocation EndProtoLoc, 4442 AttributeList *AttrList); 4443 4444 Decl *ActOnCompatiblityAlias( 4445 SourceLocation AtCompatibilityAliasLoc, 4446 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4447 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4448 4449 void CheckForwardProtocolDeclarationForCircularDependency( 4450 IdentifierInfo *PName, 4451 SourceLocation &PLoc, SourceLocation PrevLoc, 4452 const ObjCList<ObjCProtocolDecl> &PList); 4453 4454 Decl *ActOnStartProtocolInterface( 4455 SourceLocation AtProtoInterfaceLoc, 4456 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4457 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4458 const SourceLocation *ProtoLocs, 4459 SourceLocation EndProtoLoc, 4460 AttributeList *AttrList); 4461 4462 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4463 IdentifierInfo *ClassName, 4464 SourceLocation ClassLoc, 4465 IdentifierInfo *CategoryName, 4466 SourceLocation CategoryLoc, 4467 Decl * const *ProtoRefs, 4468 unsigned NumProtoRefs, 4469 const SourceLocation *ProtoLocs, 4470 SourceLocation EndProtoLoc); 4471 4472 Decl *ActOnStartClassImplementation( 4473 SourceLocation AtClassImplLoc, 4474 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4475 IdentifierInfo *SuperClassname, 4476 SourceLocation SuperClassLoc); 4477 4478 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4479 IdentifierInfo *ClassName, 4480 SourceLocation ClassLoc, 4481 IdentifierInfo *CatName, 4482 SourceLocation CatLoc); 4483 4484 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4485 IdentifierInfo **IdentList, 4486 SourceLocation *IdentLocs, 4487 unsigned NumElts); 4488 4489 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4490 const IdentifierLocPair *IdentList, 4491 unsigned NumElts, 4492 AttributeList *attrList); 4493 4494 void FindProtocolDeclaration(bool WarnOnDeclarations, 4495 const IdentifierLocPair *ProtocolId, 4496 unsigned NumProtocols, 4497 llvm::SmallVectorImpl<Decl *> &Protocols); 4498 4499 /// Ensure attributes are consistent with type. 4500 /// \param [in, out] Attributes The attributes to check; they will 4501 /// be modified to be consistent with \arg PropertyTy. 4502 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4503 SourceLocation Loc, 4504 unsigned &Attributes); 4505 4506 /// Process the specified property declaration and create decls for the 4507 /// setters and getters as needed. 4508 /// \param property The property declaration being processed 4509 /// \param DC The semantic container for the property 4510 /// \param redeclaredProperty Declaration for property if redeclared 4511 /// in class extension. 4512 /// \param lexicalDC Container for redeclaredProperty. 4513 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4514 ObjCContainerDecl *DC, 4515 ObjCPropertyDecl *redeclaredProperty = 0, 4516 ObjCContainerDecl *lexicalDC = 0); 4517 4518 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 4519 ObjCPropertyDecl *SuperProperty, 4520 const IdentifierInfo *Name); 4521 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 4522 4523 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 4524 ObjCMethodDecl *MethodDecl, 4525 bool IsInstance); 4526 4527 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 4528 4529 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 4530 ObjCInterfaceDecl *ID); 4531 4532 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 4533 ObjCProtocolDecl *PDecl); 4534 4535 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 4536 Decl **allMethods = 0, unsigned allNum = 0, 4537 Decl **allProperties = 0, unsigned pNum = 0, 4538 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 4539 4540 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 4541 FieldDeclarator &FD, ObjCDeclSpec &ODS, 4542 Selector GetterSel, Selector SetterSel, 4543 Decl *ClassCategory, 4544 bool *OverridingProperty, 4545 tok::ObjCKeywordKind MethodImplKind, 4546 DeclContext *lexicalDC = 0); 4547 4548 Decl *ActOnPropertyImplDecl(Scope *S, 4549 SourceLocation AtLoc, 4550 SourceLocation PropertyLoc, 4551 bool ImplKind,Decl *ClassImplDecl, 4552 IdentifierInfo *PropertyId, 4553 IdentifierInfo *PropertyIvar, 4554 SourceLocation PropertyIvarLoc); 4555 4556 struct ObjCArgInfo { 4557 IdentifierInfo *Name; 4558 SourceLocation NameLoc; 4559 // The Type is null if no type was specified, and the DeclSpec is invalid 4560 // in this case. 4561 ParsedType Type; 4562 ObjCDeclSpec DeclSpec; 4563 4564 /// ArgAttrs - Attribute list for this argument. 4565 AttributeList *ArgAttrs; 4566 }; 4567 4568 Decl *ActOnMethodDeclaration( 4569 Scope *S, 4570 SourceLocation BeginLoc, // location of the + or -. 4571 SourceLocation EndLoc, // location of the ; or {. 4572 tok::TokenKind MethodType, 4573 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 4574 Selector Sel, 4575 // optional arguments. The number of types/arguments is obtained 4576 // from the Sel.getNumArgs(). 4577 ObjCArgInfo *ArgInfo, 4578 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 4579 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 4580 bool isVariadic, bool MethodDefinition); 4581 4582 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 4583 // Will search "local" class/category implementations for a method decl. 4584 // Will also search in class's root looking for instance method. 4585 // Returns 0 if no method is found. 4586 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 4587 ObjCInterfaceDecl *CDecl); 4588 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 4589 ObjCInterfaceDecl *ClassDecl); 4590 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 4591 const ObjCObjectPointerType *OPT, 4592 bool IsInstance); 4593 4594 ExprResult 4595 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 4596 Expr *BaseExpr, 4597 DeclarationName MemberName, 4598 SourceLocation MemberLoc, 4599 SourceLocation SuperLoc, QualType SuperType, 4600 bool Super); 4601 4602 ExprResult 4603 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 4604 IdentifierInfo &propertyName, 4605 SourceLocation receiverNameLoc, 4606 SourceLocation propertyNameLoc); 4607 4608 ObjCMethodDecl *tryCaptureObjCSelf(); 4609 4610 /// \brief Describes the kind of message expression indicated by a message 4611 /// send that starts with an identifier. 4612 enum ObjCMessageKind { 4613 /// \brief The message is sent to 'super'. 4614 ObjCSuperMessage, 4615 /// \brief The message is an instance message. 4616 ObjCInstanceMessage, 4617 /// \brief The message is a class message, and the identifier is a type 4618 /// name. 4619 ObjCClassMessage 4620 }; 4621 4622 ObjCMessageKind getObjCMessageKind(Scope *S, 4623 IdentifierInfo *Name, 4624 SourceLocation NameLoc, 4625 bool IsSuper, 4626 bool HasTrailingDot, 4627 ParsedType &ReceiverType); 4628 4629 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 4630 Selector Sel, 4631 SourceLocation LBracLoc, 4632 SourceLocation SelectorLoc, 4633 SourceLocation RBracLoc, 4634 MultiExprArg Args); 4635 4636 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 4637 QualType ReceiverType, 4638 SourceLocation SuperLoc, 4639 Selector Sel, 4640 ObjCMethodDecl *Method, 4641 SourceLocation LBracLoc, 4642 SourceLocation SelectorLoc, 4643 SourceLocation RBracLoc, 4644 MultiExprArg Args); 4645 4646 ExprResult ActOnClassMessage(Scope *S, 4647 ParsedType Receiver, 4648 Selector Sel, 4649 SourceLocation LBracLoc, 4650 SourceLocation SelectorLoc, 4651 SourceLocation RBracLoc, 4652 MultiExprArg Args); 4653 4654 ExprResult BuildInstanceMessage(Expr *Receiver, 4655 QualType ReceiverType, 4656 SourceLocation SuperLoc, 4657 Selector Sel, 4658 ObjCMethodDecl *Method, 4659 SourceLocation LBracLoc, 4660 SourceLocation SelectorLoc, 4661 SourceLocation RBracLoc, 4662 MultiExprArg Args); 4663 4664 ExprResult ActOnInstanceMessage(Scope *S, 4665 Expr *Receiver, 4666 Selector Sel, 4667 SourceLocation LBracLoc, 4668 SourceLocation SelectorLoc, 4669 SourceLocation RBracLoc, 4670 MultiExprArg Args); 4671 4672 4673 enum PragmaOptionsAlignKind { 4674 POAK_Native, // #pragma options align=native 4675 POAK_Natural, // #pragma options align=natural 4676 POAK_Packed, // #pragma options align=packed 4677 POAK_Power, // #pragma options align=power 4678 POAK_Mac68k, // #pragma options align=mac68k 4679 POAK_Reset // #pragma options align=reset 4680 }; 4681 4682 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 4683 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 4684 SourceLocation PragmaLoc, 4685 SourceLocation KindLoc); 4686 4687 enum PragmaPackKind { 4688 PPK_Default, // #pragma pack([n]) 4689 PPK_Show, // #pragma pack(show), only supported by MSVC. 4690 PPK_Push, // #pragma pack(push, [identifier], [n]) 4691 PPK_Pop // #pragma pack(pop, [identifier], [n]) 4692 }; 4693 4694 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 4695 void ActOnPragmaPack(PragmaPackKind Kind, 4696 IdentifierInfo *Name, 4697 Expr *Alignment, 4698 SourceLocation PragmaLoc, 4699 SourceLocation LParenLoc, 4700 SourceLocation RParenLoc); 4701 4702 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 4703 void ActOnPragmaUnused(const Token &Identifier, 4704 Scope *curScope, 4705 SourceLocation PragmaLoc); 4706 4707 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 4708 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 4709 SourceLocation PragmaLoc); 4710 4711 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 4712 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 4713 4714 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 4715 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 4716 SourceLocation PragmaLoc, 4717 SourceLocation WeakNameLoc); 4718 4719 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 4720 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 4721 IdentifierInfo* AliasName, 4722 SourceLocation PragmaLoc, 4723 SourceLocation WeakNameLoc, 4724 SourceLocation AliasNameLoc); 4725 4726 /// ActOnPragmaFPContract - Called on well formed 4727 /// #pragma {STDC,OPENCL} FP_CONTRACT 4728 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 4729 4730 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 4731 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 4732 void AddAlignmentAttributesForRecord(RecordDecl *RD); 4733 4734 /// FreePackedContext - Deallocate and null out PackContext. 4735 void FreePackedContext(); 4736 4737 /// PushNamespaceVisibilityAttr - Note that we've entered a 4738 /// namespace with a visibility attribute. 4739 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 4740 4741 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 4742 /// add an appropriate visibility attribute. 4743 void AddPushedVisibilityAttribute(Decl *RD); 4744 4745 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 4746 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 4747 void PopPragmaVisibility(); 4748 4749 /// FreeVisContext - Deallocate and null out VisContext. 4750 void FreeVisContext(); 4751 4752 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 4753 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 4754 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 4755 4756 /// CastCategory - Get the correct forwarded implicit cast result category 4757 /// from the inner expression. 4758 ExprValueKind CastCategory(Expr *E); 4759 4760 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 4761 /// cast. If there is already an implicit cast, merge into the existing one. 4762 /// If isLvalue, the result of the cast is an lvalue. 4763 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 4764 ExprValueKind VK = VK_RValue, 4765 const CXXCastPath *BasePath = 0); 4766 4767 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 4768 /// to the conversion from scalar type ScalarTy to the Boolean type. 4769 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 4770 4771 /// IgnoredValueConversions - Given that an expression's result is 4772 /// syntactically ignored, perform any conversions that are 4773 /// required. 4774 ExprResult IgnoredValueConversions(Expr *E); 4775 4776 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 4777 // functions and arrays to their respective pointers (C99 6.3.2.1). 4778 ExprResult UsualUnaryConversions(Expr *E); 4779 4780 // DefaultFunctionArrayConversion - converts functions and arrays 4781 // to their respective pointers (C99 6.3.2.1). 4782 ExprResult DefaultFunctionArrayConversion(Expr *E); 4783 4784 // DefaultFunctionArrayLvalueConversion - converts functions and 4785 // arrays to their respective pointers and performs the 4786 // lvalue-to-rvalue conversion. 4787 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 4788 4789 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 4790 // the operand. This is DefaultFunctionArrayLvalueConversion, 4791 // except that it assumes the operand isn't of function or array 4792 // type. 4793 ExprResult DefaultLvalueConversion(Expr *E); 4794 4795 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 4796 // do not have a prototype. Integer promotions are performed on each 4797 // argument, and arguments that have type float are promoted to double. 4798 ExprResult DefaultArgumentPromotion(Expr *E); 4799 4800 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 4801 enum VariadicCallType { 4802 VariadicFunction, 4803 VariadicBlock, 4804 VariadicMethod, 4805 VariadicConstructor, 4806 VariadicDoesNotApply 4807 }; 4808 4809 /// GatherArgumentsForCall - Collector argument expressions for various 4810 /// form of call prototypes. 4811 bool GatherArgumentsForCall(SourceLocation CallLoc, 4812 FunctionDecl *FDecl, 4813 const FunctionProtoType *Proto, 4814 unsigned FirstProtoArg, 4815 Expr **Args, unsigned NumArgs, 4816 llvm::SmallVector<Expr *, 8> &AllArgs, 4817 VariadicCallType CallType = VariadicDoesNotApply); 4818 4819 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 4820 // will warn if the resulting type is not a POD type. 4821 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 4822 FunctionDecl *FDecl); 4823 4824 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 4825 // operands and then handles various conversions that are common to binary 4826 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 4827 // routine returns the first non-arithmetic type found. The client is 4828 // responsible for emitting appropriate error diagnostics. 4829 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 4830 bool isCompAssign = false); 4831 4832 /// AssignConvertType - All of the 'assignment' semantic checks return this 4833 /// enum to indicate whether the assignment was allowed. These checks are 4834 /// done for simple assignments, as well as initialization, return from 4835 /// function, argument passing, etc. The query is phrased in terms of a 4836 /// source and destination type. 4837 enum AssignConvertType { 4838 /// Compatible - the types are compatible according to the standard. 4839 Compatible, 4840 4841 /// PointerToInt - The assignment converts a pointer to an int, which we 4842 /// accept as an extension. 4843 PointerToInt, 4844 4845 /// IntToPointer - The assignment converts an int to a pointer, which we 4846 /// accept as an extension. 4847 IntToPointer, 4848 4849 /// FunctionVoidPointer - The assignment is between a function pointer and 4850 /// void*, which the standard doesn't allow, but we accept as an extension. 4851 FunctionVoidPointer, 4852 4853 /// IncompatiblePointer - The assignment is between two pointers types that 4854 /// are not compatible, but we accept them as an extension. 4855 IncompatiblePointer, 4856 4857 /// IncompatiblePointer - The assignment is between two pointers types which 4858 /// point to integers which have a different sign, but are otherwise identical. 4859 /// This is a subset of the above, but broken out because it's by far the most 4860 /// common case of incompatible pointers. 4861 IncompatiblePointerSign, 4862 4863 /// CompatiblePointerDiscardsQualifiers - The assignment discards 4864 /// c/v/r qualifiers, which we accept as an extension. 4865 CompatiblePointerDiscardsQualifiers, 4866 4867 /// IncompatiblePointerDiscardsQualifiers - The assignment 4868 /// discards qualifiers that we don't permit to be discarded, 4869 /// like address spaces. 4870 IncompatiblePointerDiscardsQualifiers, 4871 4872 /// IncompatibleNestedPointerQualifiers - The assignment is between two 4873 /// nested pointer types, and the qualifiers other than the first two 4874 /// levels differ e.g. char ** -> const char **, but we accept them as an 4875 /// extension. 4876 IncompatibleNestedPointerQualifiers, 4877 4878 /// IncompatibleVectors - The assignment is between two vector types that 4879 /// have the same size, which we accept as an extension. 4880 IncompatibleVectors, 4881 4882 /// IntToBlockPointer - The assignment converts an int to a block 4883 /// pointer. We disallow this. 4884 IntToBlockPointer, 4885 4886 /// IncompatibleBlockPointer - The assignment is between two block 4887 /// pointers types that are not compatible. 4888 IncompatibleBlockPointer, 4889 4890 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 4891 /// id type and something else (that is incompatible with it). For example, 4892 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 4893 IncompatibleObjCQualifiedId, 4894 4895 /// Incompatible - We reject this conversion outright, it is invalid to 4896 /// represent it in the AST. 4897 Incompatible 4898 }; 4899 4900 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 4901 /// assignment conversion type specified by ConvTy. This returns true if the 4902 /// conversion was invalid or false if the conversion was accepted. 4903 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 4904 SourceLocation Loc, 4905 QualType DstType, QualType SrcType, 4906 Expr *SrcExpr, AssignmentAction Action, 4907 bool *Complained = 0); 4908 4909 /// CheckAssignmentConstraints - Perform type checking for assignment, 4910 /// argument passing, variable initialization, and function return values. 4911 /// C99 6.5.16. 4912 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 4913 QualType lhs, QualType rhs); 4914 4915 /// Check assignment constraints and prepare for a conversion of the 4916 /// RHS to the LHS type. 4917 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 4918 CastKind &Kind); 4919 4920 // CheckSingleAssignmentConstraints - Currently used by 4921 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 4922 // this routine performs the default function/array converions. 4923 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 4924 ExprResult &rExprRes); 4925 4926 // \brief If the lhs type is a transparent union, check whether we 4927 // can initialize the transparent union with the given expression. 4928 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 4929 ExprResult &rExpr); 4930 4931 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 4932 4933 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 4934 4935 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 4936 AssignmentAction Action, 4937 bool AllowExplicit = false); 4938 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 4939 AssignmentAction Action, 4940 bool AllowExplicit, 4941 ImplicitConversionSequence& ICS); 4942 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 4943 const ImplicitConversionSequence& ICS, 4944 AssignmentAction Action, 4945 bool CStyle = false); 4946 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 4947 const StandardConversionSequence& SCS, 4948 AssignmentAction Action, 4949 bool CStyle); 4950 4951 /// the following "Check" methods will return a valid/converted QualType 4952 /// or a null QualType (indicating an error diagnostic was issued). 4953 4954 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 4955 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 4956 QualType CheckPointerToMemberOperands( // C++ 5.5 4957 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 4958 SourceLocation OpLoc, bool isIndirect); 4959 QualType CheckMultiplyDivideOperands( // C99 6.5.5 4960 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 4961 bool isDivide); 4962 QualType CheckRemainderOperands( // C99 6.5.5 4963 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 4964 QualType CheckAdditionOperands( // C99 6.5.6 4965 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4966 QualType CheckSubtractionOperands( // C99 6.5.6 4967 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 4968 QualType CheckShiftOperands( // C99 6.5.7 4969 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 4970 bool isCompAssign = false); 4971 QualType CheckCompareOperands( // C99 6.5.8/9 4972 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 4973 bool isRelational); 4974 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 4975 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 4976 QualType CheckLogicalOperands( // C99 6.5.[13,14] 4977 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 4978 // CheckAssignmentOperands is used for both simple and compound assignment. 4979 // For simple assignment, pass both expressions and a null converted type. 4980 // For compound assignment, pass both expressions and the converted type. 4981 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 4982 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 4983 4984 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 4985 ExprResult ConvertPropertyForRValue(Expr *E); 4986 4987 QualType CheckConditionalOperands( // C99 6.5.15 4988 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 4989 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4990 QualType CXXCheckConditionalOperands( // C++ 5.16 4991 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 4992 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 4993 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 4994 bool *NonStandardCompositeType = 0); 4995 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 4996 bool *NonStandardCompositeType = 0) { 4997 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 4998 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 4999 E1 = Owned(E1Tmp); 5000 E2 = Owned(E2Tmp); 5001 return Composite; 5002 } 5003 5004 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5005 SourceLocation questionLoc); 5006 5007 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5008 SourceLocation QuestionLoc); 5009 5010 /// type checking for vector binary operators. 5011 QualType CheckVectorOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5012 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5013 SourceLocation l, bool isRel); 5014 5015 /// type checking declaration initializers (C99 6.7.8) 5016 bool CheckInitList(const InitializedEntity &Entity, 5017 InitListExpr *&InitList, QualType &DeclType); 5018 bool CheckForConstantInitializer(Expr *e, QualType t); 5019 5020 // type checking C++ declaration initializers (C++ [dcl.init]). 5021 5022 /// ReferenceCompareResult - Expresses the result of comparing two 5023 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5024 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5025 enum ReferenceCompareResult { 5026 /// Ref_Incompatible - The two types are incompatible, so direct 5027 /// reference binding is not possible. 5028 Ref_Incompatible = 0, 5029 /// Ref_Related - The two types are reference-related, which means 5030 /// that their unqualified forms (T1 and T2) are either the same 5031 /// or T1 is a base class of T2. 5032 Ref_Related, 5033 /// Ref_Compatible_With_Added_Qualification - The two types are 5034 /// reference-compatible with added qualification, meaning that 5035 /// they are reference-compatible and the qualifiers on T1 (cv1) 5036 /// are greater than the qualifiers on T2 (cv2). 5037 Ref_Compatible_With_Added_Qualification, 5038 /// Ref_Compatible - The two types are reference-compatible and 5039 /// have equivalent qualifiers (cv1 == cv2). 5040 Ref_Compatible 5041 }; 5042 5043 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5044 QualType T1, QualType T2, 5045 bool &DerivedToBase, 5046 bool &ObjCConversion); 5047 5048 /// CheckCastTypes - Check type constraints for casting between types under 5049 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5050 ExprResult CheckCastTypes(SourceRange TyRange, QualType CastTy, Expr *CastExpr, 5051 CastKind &Kind, ExprValueKind &VK, CXXCastPath &BasePath, 5052 bool FunctionalStyle = false); 5053 5054 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5055 Expr *castExpr, CastKind &castKind, 5056 ExprValueKind &valueKind, CXXCastPath &BasePath); 5057 5058 // CheckVectorCast - check type constraints for vectors. 5059 // Since vectors are an extension, there are no C standard reference for this. 5060 // We allow casting between vectors and integer datatypes of the same size. 5061 // returns true if the cast is invalid 5062 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5063 CastKind &Kind); 5064 5065 // CheckExtVectorCast - check type constraints for extended vectors. 5066 // Since vectors are an extension, there are no C standard reference for this. 5067 // We allow casting between vectors and integer datatypes of the same size, 5068 // or vectors and the element type of that vector. 5069 // returns the cast expr 5070 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5071 CastKind &Kind); 5072 5073 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5074 /// cast under C++ semantics. 5075 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5076 Expr *CastExpr, CastKind &Kind, 5077 CXXCastPath &BasePath, bool FunctionalStyle); 5078 5079 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5080 /// \param Method - May be null. 5081 /// \param [out] ReturnType - The return type of the send. 5082 /// \return true iff there were any incompatible types. 5083 bool CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs, Selector Sel, 5084 ObjCMethodDecl *Method, bool isClassMessage, 5085 SourceLocation lbrac, SourceLocation rbrac, 5086 QualType &ReturnType, ExprValueKind &VK); 5087 5088 /// CheckBooleanCondition - Diagnose problems involving the use of 5089 /// the given expression as a boolean condition (e.g. in an if 5090 /// statement). Also performs the standard function and array 5091 /// decays, possibly changing the input variable. 5092 /// 5093 /// \param Loc - A location associated with the condition, e.g. the 5094 /// 'if' keyword. 5095 /// \return true iff there were any errors 5096 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5097 5098 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5099 Expr *SubExpr); 5100 5101 /// DiagnoseAssignmentAsCondition - Given that an expression is 5102 /// being used as a boolean condition, warn if it's an assignment. 5103 void DiagnoseAssignmentAsCondition(Expr *E); 5104 5105 /// \brief Redundant parentheses over an equality comparison can indicate 5106 /// that the user intended an assignment used as condition. 5107 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5108 5109 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5110 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5111 5112 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5113 /// the specified width and sign. If an overflow occurs, detect it and emit 5114 /// the specified diagnostic. 5115 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5116 unsigned NewWidth, bool NewSign, 5117 SourceLocation Loc, unsigned DiagID); 5118 5119 /// Checks that the Objective-C declaration is declared in the global scope. 5120 /// Emits an error and marks the declaration as invalid if it's not declared 5121 /// in the global scope. 5122 bool CheckObjCDeclScope(Decl *D); 5123 5124 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5125 /// and reports the appropriate diagnostics. Returns false on success. 5126 /// Can optionally return the value of the expression. 5127 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5128 5129 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5130 /// the correct width, and that the field type is valid. 5131 /// Returns false on success. 5132 /// Can optionally return whether the bit-field is of width 0 5133 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5134 QualType FieldTy, const Expr *BitWidth, 5135 bool *ZeroWidth = 0); 5136 5137 /// \name Code completion 5138 //@{ 5139 /// \brief Describes the context in which code completion occurs. 5140 enum ParserCompletionContext { 5141 /// \brief Code completion occurs at top-level or namespace context. 5142 PCC_Namespace, 5143 /// \brief Code completion occurs within a class, struct, or union. 5144 PCC_Class, 5145 /// \brief Code completion occurs within an Objective-C interface, protocol, 5146 /// or category. 5147 PCC_ObjCInterface, 5148 /// \brief Code completion occurs within an Objective-C implementation or 5149 /// category implementation 5150 PCC_ObjCImplementation, 5151 /// \brief Code completion occurs within the list of instance variables 5152 /// in an Objective-C interface, protocol, category, or implementation. 5153 PCC_ObjCInstanceVariableList, 5154 /// \brief Code completion occurs following one or more template 5155 /// headers. 5156 PCC_Template, 5157 /// \brief Code completion occurs following one or more template 5158 /// headers within a class. 5159 PCC_MemberTemplate, 5160 /// \brief Code completion occurs within an expression. 5161 PCC_Expression, 5162 /// \brief Code completion occurs within a statement, which may 5163 /// also be an expression or a declaration. 5164 PCC_Statement, 5165 /// \brief Code completion occurs at the beginning of the 5166 /// initialization statement (or expression) in a for loop. 5167 PCC_ForInit, 5168 /// \brief Code completion occurs within the condition of an if, 5169 /// while, switch, or for statement. 5170 PCC_Condition, 5171 /// \brief Code completion occurs within the body of a function on a 5172 /// recovery path, where we do not have a specific handle on our position 5173 /// in the grammar. 5174 PCC_RecoveryInFunction, 5175 /// \brief Code completion occurs where only a type is permitted. 5176 PCC_Type, 5177 /// \brief Code completion occurs in a parenthesized expression, which 5178 /// might also be a type cast. 5179 PCC_ParenthesizedExpression, 5180 /// \brief Code completion occurs within a sequence of declaration 5181 /// specifiers within a function, method, or block. 5182 PCC_LocalDeclarationSpecifiers 5183 }; 5184 5185 void CodeCompleteOrdinaryName(Scope *S, 5186 ParserCompletionContext CompletionContext); 5187 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5188 bool AllowNonIdentifiers, 5189 bool AllowNestedNameSpecifiers); 5190 5191 struct CodeCompleteExpressionData; 5192 void CodeCompleteExpression(Scope *S, 5193 const CodeCompleteExpressionData &Data); 5194 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5195 SourceLocation OpLoc, 5196 bool IsArrow); 5197 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5198 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5199 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5200 void CodeCompleteCase(Scope *S); 5201 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5202 void CodeCompleteInitializer(Scope *S, Decl *D); 5203 void CodeCompleteReturn(Scope *S); 5204 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5205 5206 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5207 bool EnteringContext); 5208 void CodeCompleteUsing(Scope *S); 5209 void CodeCompleteUsingDirective(Scope *S); 5210 void CodeCompleteNamespaceDecl(Scope *S); 5211 void CodeCompleteNamespaceAliasDecl(Scope *S); 5212 void CodeCompleteOperatorName(Scope *S); 5213 void CodeCompleteConstructorInitializer(Decl *Constructor, 5214 CXXCtorInitializer** Initializers, 5215 unsigned NumInitializers); 5216 5217 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5218 bool InInterface); 5219 void CodeCompleteObjCAtVisibility(Scope *S); 5220 void CodeCompleteObjCAtStatement(Scope *S); 5221 void CodeCompleteObjCAtExpression(Scope *S); 5222 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5223 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5224 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5225 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5226 bool IsParameter); 5227 void CodeCompleteObjCMessageReceiver(Scope *S); 5228 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5229 IdentifierInfo **SelIdents, 5230 unsigned NumSelIdents, 5231 bool AtArgumentExpression); 5232 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5233 IdentifierInfo **SelIdents, 5234 unsigned NumSelIdents, 5235 bool AtArgumentExpression, 5236 bool IsSuper = false); 5237 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5238 IdentifierInfo **SelIdents, 5239 unsigned NumSelIdents, 5240 bool AtArgumentExpression, 5241 ObjCInterfaceDecl *Super = 0); 5242 void CodeCompleteObjCForCollection(Scope *S, 5243 DeclGroupPtrTy IterationVar); 5244 void CodeCompleteObjCSelector(Scope *S, 5245 IdentifierInfo **SelIdents, 5246 unsigned NumSelIdents); 5247 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5248 unsigned NumProtocols); 5249 void CodeCompleteObjCProtocolDecl(Scope *S); 5250 void CodeCompleteObjCInterfaceDecl(Scope *S); 5251 void CodeCompleteObjCSuperclass(Scope *S, 5252 IdentifierInfo *ClassName, 5253 SourceLocation ClassNameLoc); 5254 void CodeCompleteObjCImplementationDecl(Scope *S); 5255 void CodeCompleteObjCInterfaceCategory(Scope *S, 5256 IdentifierInfo *ClassName, 5257 SourceLocation ClassNameLoc); 5258 void CodeCompleteObjCImplementationCategory(Scope *S, 5259 IdentifierInfo *ClassName, 5260 SourceLocation ClassNameLoc); 5261 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5262 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5263 IdentifierInfo *PropertyName, 5264 Decl *ObjCImpDecl); 5265 void CodeCompleteObjCMethodDecl(Scope *S, 5266 bool IsInstanceMethod, 5267 ParsedType ReturnType, 5268 Decl *IDecl); 5269 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5270 bool IsInstanceMethod, 5271 bool AtParameterName, 5272 ParsedType ReturnType, 5273 IdentifierInfo **SelIdents, 5274 unsigned NumSelIdents); 5275 void CodeCompletePreprocessorDirective(bool InConditional); 5276 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5277 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5278 void CodeCompletePreprocessorExpression(); 5279 void CodeCompletePreprocessorMacroArgument(Scope *S, 5280 IdentifierInfo *Macro, 5281 MacroInfo *MacroInfo, 5282 unsigned Argument); 5283 void CodeCompleteNaturalLanguage(); 5284 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5285 llvm::SmallVectorImpl<CodeCompletionResult> &Results); 5286 //@} 5287 5288 void PrintStats() const {} 5289 5290 //===--------------------------------------------------------------------===// 5291 // Extra semantic analysis beyond the C type system 5292 5293public: 5294 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5295 unsigned ByteNo) const; 5296 5297private: 5298 void CheckArrayAccess(const Expr *E); 5299 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5300 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5301 5302 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5303 bool CheckObjCString(Expr *Arg); 5304 5305 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5306 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5307 5308 bool SemaBuiltinVAStart(CallExpr *TheCall); 5309 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5310 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5311 5312public: 5313 // Used by C++ template instantiation. 5314 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5315 5316private: 5317 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5318 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5319 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5320 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5321 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5322 llvm::APSInt &Result); 5323 5324 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5325 bool HasVAListArg, unsigned format_idx, 5326 unsigned firstDataArg, bool isPrintf); 5327 5328 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5329 const CallExpr *TheCall, bool HasVAListArg, 5330 unsigned format_idx, unsigned firstDataArg, 5331 bool isPrintf); 5332 5333 void CheckNonNullArguments(const NonNullAttr *NonNull, 5334 const Expr * const *ExprArgs, 5335 SourceLocation CallSiteLoc); 5336 5337 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5338 unsigned format_idx, unsigned firstDataArg, 5339 bool isPrintf); 5340 5341 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5342 SourceLocation ReturnLoc); 5343 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5344 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5345 5346 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5347 Expr *Init); 5348 5349 /// \brief The parser's current scope. 5350 /// 5351 /// The parser maintains this state here. 5352 Scope *CurScope; 5353 5354protected: 5355 friend class Parser; 5356 friend class InitializationSequence; 5357 5358 /// \brief Retrieve the parser's current scope. 5359 Scope *getCurScope() const { return CurScope; } 5360}; 5361 5362/// \brief RAII object that enters a new expression evaluation context. 5363class EnterExpressionEvaluationContext { 5364 Sema &Actions; 5365 5366public: 5367 EnterExpressionEvaluationContext(Sema &Actions, 5368 Sema::ExpressionEvaluationContext NewContext) 5369 : Actions(Actions) { 5370 Actions.PushExpressionEvaluationContext(NewContext); 5371 } 5372 5373 ~EnterExpressionEvaluationContext() { 5374 Actions.PopExpressionEvaluationContext(); 5375 } 5376}; 5377 5378} // end namespace clang 5379 5380#endif 5381