Sema.h revision c8d7f586180995ba33d03c0f6115b6a7bdefe326
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/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/MultiInitializer.h" 26#include "clang/Sema/TypoCorrection.h" 27#include "clang/Sema/Weak.h" 28#include "clang/AST/Expr.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/Basic/Specifiers.h" 33#include "clang/Basic/TemplateKinds.h" 34#include "clang/Basic/TypeTraits.h" 35#include "clang/Basic/ExpressionTraits.h" 36#include "llvm/ADT/ArrayRef.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/SmallVector.h" 40#include <deque> 41#include <string> 42 43namespace llvm { 44 class APSInt; 45 template <typename ValueT> struct DenseMapInfo; 46 template <typename ValueT, typename ValueInfoT> class DenseSet; 47} 48 49namespace clang { 50 class ADLResult; 51 class ASTConsumer; 52 class ASTContext; 53 class ASTMutationListener; 54 class ASTReader; 55 class ASTWriter; 56 class ArrayType; 57 class AttributeList; 58 class BlockDecl; 59 class CXXBasePath; 60 class CXXBasePaths; 61 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 62 class CXXConstructorDecl; 63 class CXXConversionDecl; 64 class CXXDestructorDecl; 65 class CXXFieldCollector; 66 class CXXMemberCallExpr; 67 class CXXMethodDecl; 68 class CXXScopeSpec; 69 class CXXTemporary; 70 class CXXTryStmt; 71 class CallExpr; 72 class ClassTemplateDecl; 73 class ClassTemplatePartialSpecializationDecl; 74 class ClassTemplateSpecializationDecl; 75 class CodeCompleteConsumer; 76 class CodeCompletionAllocator; 77 class CodeCompletionResult; 78 class Decl; 79 class DeclAccessPair; 80 class DeclContext; 81 class DeclRefExpr; 82 class DeclaratorDecl; 83 class DeducedTemplateArgument; 84 class DependentDiagnostic; 85 class DesignatedInitExpr; 86 class Designation; 87 class EnumConstantDecl; 88 class Expr; 89 class ExtVectorType; 90 class ExternalSemaSource; 91 class FormatAttr; 92 class FriendDecl; 93 class FunctionDecl; 94 class FunctionProtoType; 95 class FunctionTemplateDecl; 96 class ImplicitConversionSequence; 97 class InitListExpr; 98 class InitializationKind; 99 class InitializationSequence; 100 class InitializedEntity; 101 class IntegerLiteral; 102 class LabelStmt; 103 class LangOptions; 104 class LocalInstantiationScope; 105 class LookupResult; 106 class MacroInfo; 107 class MultiLevelTemplateArgumentList; 108 class NamedDecl; 109 class NonNullAttr; 110 class ObjCCategoryDecl; 111 class ObjCCategoryImplDecl; 112 class ObjCCompatibleAliasDecl; 113 class ObjCContainerDecl; 114 class ObjCImplDecl; 115 class ObjCImplementationDecl; 116 class ObjCInterfaceDecl; 117 class ObjCIvarDecl; 118 template <class T> class ObjCList; 119 class ObjCMessageExpr; 120 class ObjCMethodDecl; 121 class ObjCPropertyDecl; 122 class ObjCProtocolDecl; 123 class OverloadCandidateSet; 124 class OverloadExpr; 125 class ParenListExpr; 126 class ParmVarDecl; 127 class Preprocessor; 128 class PseudoDestructorTypeStorage; 129 class QualType; 130 class StandardConversionSequence; 131 class Stmt; 132 class StringLiteral; 133 class SwitchStmt; 134 class TargetAttributesSema; 135 class TemplateArgument; 136 class TemplateArgumentList; 137 class TemplateArgumentLoc; 138 class TemplateDecl; 139 class TemplateParameterList; 140 class TemplatePartialOrderingContext; 141 class TemplateTemplateParmDecl; 142 class Token; 143 class TypeAliasDecl; 144 class TypedefDecl; 145 class TypedefNameDecl; 146 class TypeLoc; 147 class UnqualifiedId; 148 class UnresolvedLookupExpr; 149 class UnresolvedMemberExpr; 150 class UnresolvedSetImpl; 151 class UnresolvedSetIterator; 152 class UsingDecl; 153 class UsingShadowDecl; 154 class ValueDecl; 155 class VarDecl; 156 class VisibilityAttr; 157 class VisibleDeclConsumer; 158 class IndirectFieldDecl; 159 160namespace sema { 161 class AccessedEntity; 162 class BlockScopeInfo; 163 class DelayedDiagnostic; 164 class FunctionScopeInfo; 165 class TemplateDeductionInfo; 166} 167 168// FIXME: No way to easily map from TemplateTypeParmTypes to 169// TemplateTypeParmDecls, so we have this horrible PointerUnion. 170typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 171 SourceLocation> UnexpandedParameterPack; 172 173/// Sema - This implements semantic analysis and AST building for C. 174class Sema { 175 Sema(const Sema&); // DO NOT IMPLEMENT 176 void operator=(const Sema&); // DO NOT IMPLEMENT 177 mutable const TargetAttributesSema* TheTargetAttributesSema; 178public: 179 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 180 typedef OpaquePtr<TemplateName> TemplateTy; 181 typedef OpaquePtr<QualType> TypeTy; 182 183 OpenCLOptions OpenCLFeatures; 184 FPOptions FPFeatures; 185 186 const LangOptions &LangOpts; 187 Preprocessor &PP; 188 ASTContext &Context; 189 ASTConsumer &Consumer; 190 DiagnosticsEngine &Diags; 191 SourceManager &SourceMgr; 192 193 /// \brief Flag indicating whether or not to collect detailed statistics. 194 bool CollectStats; 195 196 /// \brief Source of additional semantic information. 197 ExternalSemaSource *ExternalSource; 198 199 /// \brief Code-completion consumer. 200 CodeCompleteConsumer *CodeCompleter; 201 202 /// CurContext - This is the current declaration context of parsing. 203 DeclContext *CurContext; 204 205 /// \brief Generally null except when we temporarily switch decl contexts, 206 /// like in \see ActOnObjCTemporaryExitContainerContext. 207 DeclContext *OriginalLexicalContext; 208 209 /// VAListTagName - The declaration name corresponding to __va_list_tag. 210 /// This is used as part of a hack to omit that class from ADL results. 211 DeclarationName VAListTagName; 212 213 /// PackContext - Manages the stack for #pragma pack. An alignment 214 /// of 0 indicates default alignment. 215 void *PackContext; // Really a "PragmaPackStack*" 216 217 bool MSStructPragmaOn; // True when #pragma ms_struct on 218 219 /// VisContext - Manages the stack for #pragma GCC visibility. 220 void *VisContext; // Really a "PragmaVisStack*" 221 222 /// ExprNeedsCleanups - True if the current evaluation context 223 /// requires cleanups to be run at its conclusion. 224 bool ExprNeedsCleanups; 225 226 /// ExprCleanupObjects - This is the stack of objects requiring 227 /// cleanup that are created by the current full expression. The 228 /// element type here is ExprWithCleanups::Object. 229 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 230 231 /// \brief Stack containing information about each of the nested 232 /// function, block, and method scopes that are currently active. 233 /// 234 /// This array is never empty. Clients should ignore the first 235 /// element, which is used to cache a single FunctionScopeInfo 236 /// that's used to parse every top-level function. 237 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 238 239 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 240 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 241 ExtVectorDeclsType; 242 243 /// ExtVectorDecls - This is a list all the extended vector types. This allows 244 /// us to associate a raw vector type with one of the ext_vector type names. 245 /// This is only necessary for issuing pretty diagnostics. 246 ExtVectorDeclsType ExtVectorDecls; 247 248 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 249 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 250 251 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 252 253 /// PureVirtualClassDiagSet - a set of class declarations which we have 254 /// emitted a list of pure virtual functions. Used to prevent emitting the 255 /// same list more than once. 256 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 257 258 /// ParsingInitForAutoVars - a set of declarations with auto types for which 259 /// we are currently parsing the initializer. 260 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 261 262 /// \brief A mapping from external names to the most recent 263 /// locally-scoped external declaration with that name. 264 /// 265 /// This map contains external declarations introduced in local 266 /// scoped, e.g., 267 /// 268 /// \code 269 /// void f() { 270 /// void foo(int, int); 271 /// } 272 /// \endcode 273 /// 274 /// Here, the name "foo" will be associated with the declaration on 275 /// "foo" within f. This name is not visible outside of 276 /// "f". However, we still find it in two cases: 277 /// 278 /// - If we are declaring another external with the name "foo", we 279 /// can find "foo" as a previous declaration, so that the types 280 /// of this external declaration can be checked for 281 /// compatibility. 282 /// 283 /// - If we would implicitly declare "foo" (e.g., due to a call to 284 /// "foo" in C when no prototype or definition is visible), then 285 /// we find this declaration of "foo" and complain that it is 286 /// not visible. 287 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 288 289 /// \brief Look for a locally scoped external declaration by the given name. 290 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 291 findLocallyScopedExternalDecl(DeclarationName Name); 292 293 typedef LazyVector<VarDecl *, ExternalSemaSource, 294 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 295 TentativeDefinitionsType; 296 297 /// \brief All the tentative definitions encountered in the TU. 298 TentativeDefinitionsType TentativeDefinitions; 299 300 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 301 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 302 UnusedFileScopedDeclsType; 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 UnusedFileScopedDeclsType UnusedFileScopedDecls; 307 308 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 309 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 310 DelegatingCtorDeclsType; 311 312 /// \brief All the delegating constructors seen so far in the file, used for 313 /// cycle detection at the end of the TU. 314 DelegatingCtorDeclsType DelegatingCtorDecls; 315 316 /// \brief All the overriding destructors seen during a class definition 317 /// (there could be multiple due to nested classes) that had their exception 318 /// spec checks delayed, plus the overridden destructor. 319 SmallVector<std::pair<const CXXDestructorDecl*, 320 const CXXDestructorDecl*>, 2> 321 DelayedDestructorExceptionSpecChecks; 322 323 /// \brief Callback to the parser to parse templated functions when needed. 324 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 325 LateTemplateParserCB *LateTemplateParser; 326 void *OpaqueParser; 327 328 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 329 LateTemplateParser = LTP; 330 OpaqueParser = P; 331 } 332 333 class DelayedDiagnostics; 334 335 class ParsingDeclState { 336 unsigned SavedStackSize; 337 friend class Sema::DelayedDiagnostics; 338 }; 339 340 class ProcessingContextState { 341 unsigned SavedParsingDepth; 342 unsigned SavedActiveStackBase; 343 friend class Sema::DelayedDiagnostics; 344 }; 345 346 /// A class which encapsulates the logic for delaying diagnostics 347 /// during parsing and other processing. 348 class DelayedDiagnostics { 349 /// \brief The stack of diagnostics that were delayed due to being 350 /// produced during the parsing of a declaration. 351 sema::DelayedDiagnostic *Stack; 352 353 /// \brief The number of objects on the delayed-diagnostics stack. 354 unsigned StackSize; 355 356 /// \brief The current capacity of the delayed-diagnostics stack. 357 unsigned StackCapacity; 358 359 /// \brief The index of the first "active" delayed diagnostic in 360 /// the stack. When parsing class definitions, we ignore active 361 /// delayed diagnostics from the surrounding context. 362 unsigned ActiveStackBase; 363 364 /// \brief The depth of the declarations we're currently parsing. 365 /// This gets saved and reset whenever we enter a class definition. 366 unsigned ParsingDepth; 367 368 public: 369 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 370 ActiveStackBase(0), ParsingDepth(0) {} 371 372 ~DelayedDiagnostics() { 373 delete[] reinterpret_cast<char*>(Stack); 374 } 375 376 /// Adds a delayed diagnostic. 377 void add(const sema::DelayedDiagnostic &diag); 378 379 /// Determines whether diagnostics should be delayed. 380 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 381 382 /// Observe that we've started parsing a declaration. Access and 383 /// deprecation diagnostics will be delayed; when the declaration 384 /// is completed, all active delayed diagnostics will be evaluated 385 /// in its context, and then active diagnostics stack will be 386 /// popped down to the saved depth. 387 ParsingDeclState pushParsingDecl() { 388 ParsingDepth++; 389 390 ParsingDeclState state; 391 state.SavedStackSize = StackSize; 392 return state; 393 } 394 395 /// Observe that we're completed parsing a declaration. 396 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 397 398 /// Observe that we've started processing a different context, the 399 /// contents of which are semantically separate from the 400 /// declarations it may lexically appear in. This sets aside the 401 /// current stack of active diagnostics and starts afresh. 402 ProcessingContextState pushContext() { 403 assert(StackSize >= ActiveStackBase); 404 405 ProcessingContextState state; 406 state.SavedParsingDepth = ParsingDepth; 407 state.SavedActiveStackBase = ActiveStackBase; 408 409 ActiveStackBase = StackSize; 410 ParsingDepth = 0; 411 412 return state; 413 } 414 415 /// Observe that we've stopped processing a context. This 416 /// restores the previous stack of active diagnostics. 417 void popContext(ProcessingContextState state) { 418 assert(ActiveStackBase == StackSize); 419 assert(ParsingDepth == 0); 420 ActiveStackBase = state.SavedActiveStackBase; 421 ParsingDepth = state.SavedParsingDepth; 422 } 423 } DelayedDiagnostics; 424 425 /// A RAII object to temporarily push a declaration context. 426 class ContextRAII { 427 private: 428 Sema &S; 429 DeclContext *SavedContext; 430 ProcessingContextState SavedContextState; 431 432 public: 433 ContextRAII(Sema &S, DeclContext *ContextToPush) 434 : S(S), SavedContext(S.CurContext), 435 SavedContextState(S.DelayedDiagnostics.pushContext()) 436 { 437 assert(ContextToPush && "pushing null context"); 438 S.CurContext = ContextToPush; 439 } 440 441 void pop() { 442 if (!SavedContext) return; 443 S.CurContext = SavedContext; 444 S.DelayedDiagnostics.popContext(SavedContextState); 445 SavedContext = 0; 446 } 447 448 ~ContextRAII() { 449 pop(); 450 } 451 }; 452 453 /// WeakUndeclaredIdentifiers - Identifiers contained in 454 /// #pragma weak before declared. rare. may alias another 455 /// identifier, declared or undeclared 456 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 457 458 /// \brief Load weak undeclared identifiers from the external source. 459 void LoadExternalWeakUndeclaredIdentifiers(); 460 461 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 462 /// #pragma weak during processing of other Decls. 463 /// I couldn't figure out a clean way to generate these in-line, so 464 /// we store them here and handle separately -- which is a hack. 465 /// It would be best to refactor this. 466 SmallVector<Decl*,2> WeakTopLevelDecl; 467 468 IdentifierResolver IdResolver; 469 470 /// Translation Unit Scope - useful to Objective-C actions that need 471 /// to lookup file scope declarations in the "ordinary" C decl namespace. 472 /// For example, user-defined classes, built-in "id" type, etc. 473 Scope *TUScope; 474 475 /// \brief The C++ "std" namespace, where the standard library resides. 476 LazyDeclPtr StdNamespace; 477 478 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 479 /// standard library. 480 LazyDeclPtr StdBadAlloc; 481 482 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 483 RecordDecl *CXXTypeInfoDecl; 484 485 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 486 RecordDecl *MSVCGuidDecl; 487 488 /// A flag to remember whether the implicit forms of operator new and delete 489 /// have been declared. 490 bool GlobalNewDeleteDeclared; 491 492 493 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 494 /// call was found yet. 495 bool ObjCShouldCallSuperDealloc; 496 /// A flag that is set when parsing a -finalize method and no [super finalize] 497 /// call was found yet. 498 bool ObjCShouldCallSuperFinalize; 499 500 /// \brief The set of declarations that have been referenced within 501 /// a potentially evaluated expression. 502 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 503 PotentiallyReferencedDecls; 504 505 /// \brief A set of diagnostics that may be emitted. 506 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 507 PotentiallyEmittedDiagnostics; 508 509 /// \brief Describes how the expressions currently being parsed are 510 /// evaluated at run-time, if at all. 511 enum ExpressionEvaluationContext { 512 /// \brief The current expression and its subexpressions occur within an 513 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 514 /// or the subexpression of \c sizeof, where the type or the value of the 515 /// expression may be significant but no code will be generated to evaluate 516 /// the value of the expression at run time. 517 Unevaluated, 518 519 /// \brief The current expression is potentially evaluated at run time, 520 /// which means that code may be generated to evaluate the value of the 521 /// expression at run time. 522 PotentiallyEvaluated, 523 524 /// \brief The current expression may be potentially evaluated or it may 525 /// be unevaluated, but it is impossible to tell from the lexical context. 526 /// This evaluation context is used primary for the operand of the C++ 527 /// \c typeid expression, whose argument is potentially evaluated only when 528 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 529 PotentiallyPotentiallyEvaluated, 530 531 /// \brief The current expression is potentially evaluated, but any 532 /// declarations referenced inside that expression are only used if 533 /// in fact the current expression is used. 534 /// 535 /// This value is used when parsing default function arguments, for which 536 /// we would like to provide diagnostics (e.g., passing non-POD arguments 537 /// through varargs) but do not want to mark declarations as "referenced" 538 /// until the default argument is used. 539 PotentiallyEvaluatedIfUsed 540 }; 541 542 /// \brief Data structure used to record current or nested 543 /// expression evaluation contexts. 544 struct ExpressionEvaluationContextRecord { 545 /// \brief The expression evaluation context. 546 ExpressionEvaluationContext Context; 547 548 /// \brief Whether the enclosing context needed a cleanup. 549 bool ParentNeedsCleanups; 550 551 /// \brief The number of active cleanup objects when we entered 552 /// this expression evaluation context. 553 unsigned NumCleanupObjects; 554 555 /// \brief The set of declarations referenced within a 556 /// potentially potentially-evaluated context. 557 /// 558 /// When leaving a potentially potentially-evaluated context, each 559 /// of these elements will be as referenced if the corresponding 560 /// potentially potentially evaluated expression is potentially 561 /// evaluated. 562 PotentiallyReferencedDecls *PotentiallyReferenced; 563 564 /// \brief The set of diagnostics to emit should this potentially 565 /// potentially-evaluated context become evaluated. 566 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 567 568 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 569 unsigned NumCleanupObjects, 570 bool ParentNeedsCleanups) 571 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 572 NumCleanupObjects(NumCleanupObjects), 573 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 574 575 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 576 if (!PotentiallyReferenced) 577 PotentiallyReferenced = new PotentiallyReferencedDecls; 578 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 579 } 580 581 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 582 if (!PotentiallyDiagnosed) 583 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 584 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 585 } 586 587 void Destroy() { 588 delete PotentiallyReferenced; 589 delete PotentiallyDiagnosed; 590 PotentiallyReferenced = 0; 591 PotentiallyDiagnosed = 0; 592 } 593 }; 594 595 /// A stack of expression evaluation contexts. 596 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 597 598 /// SpecialMemberOverloadResult - The overloading result for a special member 599 /// function. 600 /// 601 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 602 /// integer is used to determine whether we have a parameter qualification 603 /// match, the second-lowest is whether we had success in resolving the 604 /// overload to a unique non-deleted function. 605 /// 606 /// The ConstParamMatch bit represents whether, when looking up a copy 607 /// constructor or assignment operator, we found a potential copy 608 /// constructor/assignment operator whose first parameter is const-qualified. 609 /// This is used for determining parameter types of other objects and is 610 /// utterly meaningless on other types of special members. 611 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 612 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 613 public: 614 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 615 : FastFoldingSetNode(ID) 616 {} 617 618 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 619 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 620 621 bool hasSuccess() const { return Pair.getInt() & 0x1; } 622 void setSuccess(bool B) { 623 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 624 } 625 626 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 627 void setConstParamMatch(bool B) { 628 Pair.setInt(B << 1 | unsigned(hasSuccess())); 629 } 630 }; 631 632 /// \brief A cache of special member function overload resolution results 633 /// for C++ records. 634 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 635 636 /// \brief The kind of translation unit we are processing. 637 /// 638 /// When we're processing a complete translation unit, Sema will perform 639 /// end-of-translation-unit semantic tasks (such as creating 640 /// initializers for tentative definitions in C) once parsing has 641 /// completed. Modules and precompiled headers perform different kinds of 642 /// checks. 643 TranslationUnitKind TUKind; 644 645 llvm::BumpPtrAllocator BumpAlloc; 646 647 /// \brief The number of SFINAE diagnostics that have been trapped. 648 unsigned NumSFINAEErrors; 649 650 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 651 UnparsedDefaultArgInstantiationsMap; 652 653 /// \brief A mapping from parameters with unparsed default arguments to the 654 /// set of instantiations of each parameter. 655 /// 656 /// This mapping is a temporary data structure used when parsing 657 /// nested class templates or nested classes of class templates, 658 /// where we might end up instantiating an inner class before the 659 /// default arguments of its methods have been parsed. 660 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 661 662 // Contains the locations of the beginning of unparsed default 663 // argument locations. 664 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 665 666 /// UndefinedInternals - all the used, undefined objects with 667 /// internal linkage in this translation unit. 668 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 669 670 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 671 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 672 673 /// Method Pool - allows efficient lookup when typechecking messages to "id". 674 /// We need to maintain a list, since selectors can have differing signatures 675 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 676 /// of selectors are "overloaded"). 677 GlobalMethodPool MethodPool; 678 679 /// Method selectors used in a @selector expression. Used for implementation 680 /// of -Wselector. 681 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 682 683 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 684 685 /// Private Helper predicate to check for 'self'. 686 bool isSelfExpr(Expr *RExpr); 687public: 688 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 689 TranslationUnitKind TUKind = TU_Complete, 690 CodeCompleteConsumer *CompletionConsumer = 0); 691 ~Sema(); 692 693 /// \brief Perform initialization that occurs after the parser has been 694 /// initialized but before it parses anything. 695 void Initialize(); 696 697 const LangOptions &getLangOptions() const { return LangOpts; } 698 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 699 FPOptions &getFPOptions() { return FPFeatures; } 700 701 DiagnosticsEngine &getDiagnostics() const { return Diags; } 702 SourceManager &getSourceManager() const { return SourceMgr; } 703 const TargetAttributesSema &getTargetAttributesSema() const; 704 Preprocessor &getPreprocessor() const { return PP; } 705 ASTContext &getASTContext() const { return Context; } 706 ASTConsumer &getASTConsumer() const { return Consumer; } 707 ASTMutationListener *getASTMutationListener() const; 708 709 void PrintStats() const; 710 711 /// \brief Helper class that creates diagnostics with optional 712 /// template instantiation stacks. 713 /// 714 /// This class provides a wrapper around the basic DiagnosticBuilder 715 /// class that emits diagnostics. SemaDiagnosticBuilder is 716 /// responsible for emitting the diagnostic (as DiagnosticBuilder 717 /// does) and, if the diagnostic comes from inside a template 718 /// instantiation, printing the template instantiation stack as 719 /// well. 720 class SemaDiagnosticBuilder : public DiagnosticBuilder { 721 Sema &SemaRef; 722 unsigned DiagID; 723 724 public: 725 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 726 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 727 728 explicit SemaDiagnosticBuilder(Sema &SemaRef) 729 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 730 731 ~SemaDiagnosticBuilder(); 732 }; 733 734 /// \brief Emit a diagnostic. 735 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 736 737 /// \brief Emit a partial diagnostic. 738 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 739 740 /// \brief Build a partial diagnostic. 741 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 742 743 bool findMacroSpelling(SourceLocation &loc, StringRef name); 744 745 ExprResult Owned(Expr* E) { return E; } 746 ExprResult Owned(ExprResult R) { return R; } 747 StmtResult Owned(Stmt* S) { return S; } 748 749 void ActOnEndOfTranslationUnit(); 750 751 void CheckDelegatingCtorCycles(); 752 753 Scope *getScopeForContext(DeclContext *Ctx); 754 755 void PushFunctionScope(); 756 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 757 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 758 const Decl *D = 0, const BlockExpr *blkExpr = 0); 759 760 sema::FunctionScopeInfo *getCurFunction() const { 761 return FunctionScopes.back(); 762 } 763 764 bool hasAnyUnrecoverableErrorsInThisFunction() const; 765 766 /// \brief Retrieve the current block, if any. 767 sema::BlockScopeInfo *getCurBlock(); 768 769 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 770 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 771 772 //===--------------------------------------------------------------------===// 773 // Type Analysis / Processing: SemaType.cpp. 774 // 775 776 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 777 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 778 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 779 } 780 QualType BuildPointerType(QualType T, 781 SourceLocation Loc, DeclarationName Entity); 782 QualType BuildReferenceType(QualType T, bool LValueRef, 783 SourceLocation Loc, DeclarationName Entity); 784 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 785 Expr *ArraySize, unsigned Quals, 786 SourceRange Brackets, DeclarationName Entity); 787 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 788 SourceLocation AttrLoc); 789 QualType BuildFunctionType(QualType T, 790 QualType *ParamTypes, unsigned NumParamTypes, 791 bool Variadic, unsigned Quals, 792 RefQualifierKind RefQualifier, 793 SourceLocation Loc, DeclarationName Entity, 794 FunctionType::ExtInfo Info); 795 QualType BuildMemberPointerType(QualType T, QualType Class, 796 SourceLocation Loc, 797 DeclarationName Entity); 798 QualType BuildBlockPointerType(QualType T, 799 SourceLocation Loc, DeclarationName Entity); 800 QualType BuildParenType(QualType T); 801 QualType BuildAtomicType(QualType T, SourceLocation Loc); 802 803 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 804 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 805 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 806 TypeSourceInfo *ReturnTypeInfo); 807 /// \brief Package the given type and TSI into a ParsedType. 808 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 809 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 810 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 811 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 812 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 813 bool CheckDistantExceptionSpec(QualType T); 814 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 815 bool CheckEquivalentExceptionSpec( 816 const FunctionProtoType *Old, SourceLocation OldLoc, 817 const FunctionProtoType *New, SourceLocation NewLoc); 818 bool CheckEquivalentExceptionSpec( 819 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 820 const FunctionProtoType *Old, SourceLocation OldLoc, 821 const FunctionProtoType *New, SourceLocation NewLoc, 822 bool *MissingExceptionSpecification = 0, 823 bool *MissingEmptyExceptionSpecification = 0, 824 bool AllowNoexceptAllMatchWithNoSpec = false, 825 bool IsOperatorNew = false); 826 bool CheckExceptionSpecSubset( 827 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 828 const FunctionProtoType *Superset, SourceLocation SuperLoc, 829 const FunctionProtoType *Subset, SourceLocation SubLoc); 830 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 831 const FunctionProtoType *Target, SourceLocation TargetLoc, 832 const FunctionProtoType *Source, SourceLocation SourceLoc); 833 834 TypeResult ActOnTypeName(Scope *S, Declarator &D); 835 836 /// \brief The parser has parsed the context-sensitive type 'instancetype' 837 /// in an Objective-C message declaration. Return the appropriate type. 838 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 839 840 bool RequireCompleteType(SourceLocation Loc, QualType T, 841 const PartialDiagnostic &PD, 842 std::pair<SourceLocation, PartialDiagnostic> Note); 843 bool RequireCompleteType(SourceLocation Loc, QualType T, 844 const PartialDiagnostic &PD); 845 bool RequireCompleteType(SourceLocation Loc, QualType T, 846 unsigned DiagID); 847 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 848 std::pair<SourceLocation, 849 PartialDiagnostic> Note); 850 851 bool RequireLiteralType(SourceLocation Loc, QualType T, 852 const PartialDiagnostic &PD, 853 bool AllowIncompleteType = false); 854 855 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 856 const CXXScopeSpec &SS, QualType T); 857 858 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 859 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 860 QualType BuildUnaryTransformType(QualType BaseType, 861 UnaryTransformType::UTTKind UKind, 862 SourceLocation Loc); 863 864 //===--------------------------------------------------------------------===// 865 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 866 // 867 868 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 869 870 void DiagnoseUseOfUnimplementedSelectors(); 871 872 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 873 Scope *S, CXXScopeSpec *SS = 0, 874 bool isClassName = false, 875 bool HasTrailingDot = false, 876 ParsedType ObjectType = ParsedType(), 877 bool WantNontrivialTypeSourceInfo = false, 878 IdentifierInfo **CorrectedII = 0); 879 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 880 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 881 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 882 SourceLocation IILoc, 883 Scope *S, 884 CXXScopeSpec *SS, 885 ParsedType &SuggestedType); 886 887 /// \brief Describes the result of the name lookup and resolution performed 888 /// by \c ClassifyName(). 889 enum NameClassificationKind { 890 NC_Unknown, 891 NC_Error, 892 NC_Keyword, 893 NC_Type, 894 NC_Expression, 895 NC_NestedNameSpecifier, 896 NC_TypeTemplate, 897 NC_FunctionTemplate 898 }; 899 900 class NameClassification { 901 NameClassificationKind Kind; 902 ExprResult Expr; 903 TemplateName Template; 904 ParsedType Type; 905 const IdentifierInfo *Keyword; 906 907 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 908 909 public: 910 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 911 912 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 913 914 NameClassification(const IdentifierInfo *Keyword) 915 : Kind(NC_Keyword), Keyword(Keyword) { } 916 917 static NameClassification Error() { 918 return NameClassification(NC_Error); 919 } 920 921 static NameClassification Unknown() { 922 return NameClassification(NC_Unknown); 923 } 924 925 static NameClassification NestedNameSpecifier() { 926 return NameClassification(NC_NestedNameSpecifier); 927 } 928 929 static NameClassification TypeTemplate(TemplateName Name) { 930 NameClassification Result(NC_TypeTemplate); 931 Result.Template = Name; 932 return Result; 933 } 934 935 static NameClassification FunctionTemplate(TemplateName Name) { 936 NameClassification Result(NC_FunctionTemplate); 937 Result.Template = Name; 938 return Result; 939 } 940 941 NameClassificationKind getKind() const { return Kind; } 942 943 ParsedType getType() const { 944 assert(Kind == NC_Type); 945 return Type; 946 } 947 948 ExprResult getExpression() const { 949 assert(Kind == NC_Expression); 950 return Expr; 951 } 952 953 TemplateName getTemplateName() const { 954 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 955 return Template; 956 } 957 958 TemplateNameKind getTemplateNameKind() const { 959 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 960 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 961 } 962}; 963 964 /// \brief Perform name lookup on the given name, classifying it based on 965 /// the results of name lookup and the following token. 966 /// 967 /// This routine is used by the parser to resolve identifiers and help direct 968 /// parsing. When the identifier cannot be found, this routine will attempt 969 /// to correct the typo and classify based on the resulting name. 970 /// 971 /// \param S The scope in which we're performing name lookup. 972 /// 973 /// \param SS The nested-name-specifier that precedes the name. 974 /// 975 /// \param Name The identifier. If typo correction finds an alternative name, 976 /// this pointer parameter will be updated accordingly. 977 /// 978 /// \param NameLoc The location of the identifier. 979 /// 980 /// \param NextToken The token following the identifier. Used to help 981 /// disambiguate the name. 982 NameClassification ClassifyName(Scope *S, 983 CXXScopeSpec &SS, 984 IdentifierInfo *&Name, 985 SourceLocation NameLoc, 986 const Token &NextToken); 987 988 Decl *ActOnDeclarator(Scope *S, Declarator &D); 989 990 Decl *HandleDeclarator(Scope *S, Declarator &D, 991 MultiTemplateParamsArg TemplateParameterLists); 992 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 993 const LookupResult &Previous, 994 Scope *S); 995 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 996 void DiagnoseFunctionSpecifiers(Declarator& D); 997 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 998 void CheckShadow(Scope *S, VarDecl *D); 999 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1000 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1001 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1002 TypeSourceInfo *TInfo, 1003 LookupResult &Previous); 1004 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1005 LookupResult &Previous, bool &Redeclaration); 1006 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1007 TypeSourceInfo *TInfo, 1008 LookupResult &Previous, 1009 MultiTemplateParamsArg TemplateParamLists); 1010 // Returns true if the variable declaration is a redeclaration 1011 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1012 void CheckCompleteVariableDeclaration(VarDecl *var); 1013 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1014 TypeSourceInfo *TInfo, 1015 LookupResult &Previous, 1016 MultiTemplateParamsArg TemplateParamLists, 1017 bool &AddToScope); 1018 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1019 1020 /// \brief The kind of constexpr declaration checking we are performing. 1021 /// 1022 /// The kind affects which diagnostics (if any) are emitted if the function 1023 /// does not satisfy the requirements of a constexpr function declaration. 1024 enum CheckConstexprKind { 1025 /// \brief Check a constexpr function declaration, and produce errors if it 1026 /// does not satisfy the requirements. 1027 CCK_Declaration, 1028 /// \brief Check a constexpr function template instantiation. 1029 CCK_Instantiation, 1030 /// \brief Produce notes explaining why an instantiation was not constexpr. 1031 CCK_NoteNonConstexprInstantiation 1032 }; 1033 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, 1034 CheckConstexprKind CCK); 1035 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1036 1037 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1038 // Returns true if the function declaration is a redeclaration 1039 bool CheckFunctionDeclaration(Scope *S, 1040 FunctionDecl *NewFD, LookupResult &Previous, 1041 bool IsExplicitSpecialization); 1042 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1043 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1044 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1045 SourceLocation Loc, 1046 QualType T); 1047 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1048 SourceLocation NameLoc, IdentifierInfo *Name, 1049 QualType T, TypeSourceInfo *TSInfo, 1050 StorageClass SC, StorageClass SCAsWritten); 1051 void ActOnParamDefaultArgument(Decl *param, 1052 SourceLocation EqualLoc, 1053 Expr *defarg); 1054 void ActOnParamUnparsedDefaultArgument(Decl *param, 1055 SourceLocation EqualLoc, 1056 SourceLocation ArgLoc); 1057 void ActOnParamDefaultArgumentError(Decl *param); 1058 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1059 SourceLocation EqualLoc); 1060 1061 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1062 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1063 bool TypeMayContainAuto); 1064 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1065 void ActOnInitializerError(Decl *Dcl); 1066 void ActOnCXXForRangeDecl(Decl *D); 1067 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1068 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1069 void FinalizeDeclaration(Decl *D); 1070 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1071 Decl **Group, 1072 unsigned NumDecls); 1073 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1074 bool TypeMayContainAuto = true); 1075 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1076 SourceLocation LocAfterDecls); 1077 void CheckForFunctionRedefinition(FunctionDecl *FD); 1078 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1079 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1080 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1081 1082 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1083 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1084 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1085 1086 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1087 /// attribute for which parsing is delayed. 1088 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1089 1090 /// \brief Diagnose any unused parameters in the given sequence of 1091 /// ParmVarDecl pointers. 1092 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1093 ParmVarDecl * const *End); 1094 1095 /// \brief Diagnose whether the size of parameters or return value of a 1096 /// function or obj-c method definition is pass-by-value and larger than a 1097 /// specified threshold. 1098 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1099 ParmVarDecl * const *End, 1100 QualType ReturnTy, 1101 NamedDecl *D); 1102 1103 void DiagnoseInvalidJumps(Stmt *Body); 1104 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1105 SourceLocation AsmLoc, 1106 SourceLocation RParenLoc); 1107 1108 /// \brief The parser has processed a module import declaration. 1109 /// 1110 /// \param ImportLoc The location of the '__import_module__' keyword. 1111 /// 1112 /// \param ModuleName The name of the module. 1113 /// 1114 /// \param ModuleNameLoc The location of the module name. 1115 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1116 IdentifierInfo &ModuleName, 1117 SourceLocation ModuleNameLoc); 1118 1119 /// \brief Diagnose that \p New is a module-private redeclaration of 1120 /// \p Old. 1121 void diagnoseModulePrivateRedeclaration(NamedDecl *New, NamedDecl *Old, 1122 SourceLocation ModulePrivateKeyword 1123 = SourceLocation()); 1124 1125 /// \brief Retrieve a suitable printing policy. 1126 PrintingPolicy getPrintingPolicy() const; 1127 1128 /// Scope actions. 1129 void ActOnPopScope(SourceLocation Loc, Scope *S); 1130 void ActOnTranslationUnitScope(Scope *S); 1131 1132 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1133 DeclSpec &DS); 1134 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1135 DeclSpec &DS, 1136 MultiTemplateParamsArg TemplateParams); 1137 1138 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1139 1140 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1141 AccessSpecifier AS, 1142 RecordDecl *Record); 1143 1144 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1145 RecordDecl *Record); 1146 1147 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1148 TagTypeKind NewTag, bool isDefinition, 1149 SourceLocation NewTagLoc, 1150 const IdentifierInfo &Name); 1151 1152 enum TagUseKind { 1153 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1154 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1155 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1156 TUK_Friend // Friend declaration: 'friend struct foo;' 1157 }; 1158 1159 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1160 SourceLocation KWLoc, CXXScopeSpec &SS, 1161 IdentifierInfo *Name, SourceLocation NameLoc, 1162 AttributeList *Attr, AccessSpecifier AS, 1163 SourceLocation ModulePrivateLoc, 1164 MultiTemplateParamsArg TemplateParameterLists, 1165 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1166 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1167 1168 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1169 unsigned TagSpec, SourceLocation TagLoc, 1170 CXXScopeSpec &SS, 1171 IdentifierInfo *Name, SourceLocation NameLoc, 1172 AttributeList *Attr, 1173 MultiTemplateParamsArg TempParamLists); 1174 1175 TypeResult ActOnDependentTag(Scope *S, 1176 unsigned TagSpec, 1177 TagUseKind TUK, 1178 const CXXScopeSpec &SS, 1179 IdentifierInfo *Name, 1180 SourceLocation TagLoc, 1181 SourceLocation NameLoc); 1182 1183 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1184 IdentifierInfo *ClassName, 1185 SmallVectorImpl<Decl *> &Decls); 1186 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1187 Declarator &D, Expr *BitfieldWidth); 1188 1189 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1190 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1191 AccessSpecifier AS); 1192 1193 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1194 TypeSourceInfo *TInfo, 1195 RecordDecl *Record, SourceLocation Loc, 1196 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1197 SourceLocation TSSL, 1198 AccessSpecifier AS, NamedDecl *PrevDecl, 1199 Declarator *D = 0); 1200 1201 enum CXXSpecialMember { 1202 CXXDefaultConstructor, 1203 CXXCopyConstructor, 1204 CXXMoveConstructor, 1205 CXXCopyAssignment, 1206 CXXMoveAssignment, 1207 CXXDestructor, 1208 CXXInvalid 1209 }; 1210 bool CheckNontrivialField(FieldDecl *FD); 1211 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1212 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1213 void ActOnLastBitfield(SourceLocation DeclStart, 1214 SmallVectorImpl<Decl *> &AllIvarDecls); 1215 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1216 Declarator &D, Expr *BitfieldWidth, 1217 tok::ObjCKeywordKind visibility); 1218 1219 // This is used for both record definitions and ObjC interface declarations. 1220 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1221 llvm::ArrayRef<Decl *> Fields, 1222 SourceLocation LBrac, SourceLocation RBrac, 1223 AttributeList *AttrList); 1224 1225 /// ActOnTagStartDefinition - Invoked when we have entered the 1226 /// scope of a tag's definition (e.g., for an enumeration, class, 1227 /// struct, or union). 1228 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1229 1230 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1231 1232 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1233 /// C++ record definition's base-specifiers clause and are starting its 1234 /// member declarations. 1235 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1236 SourceLocation FinalLoc, 1237 SourceLocation LBraceLoc); 1238 1239 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1240 /// the definition of a tag (enumeration, class, struct, or union). 1241 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1242 SourceLocation RBraceLoc); 1243 1244 void ActOnObjCContainerFinishDefinition(); 1245 1246 /// \brief Invoked when we must temporarily exit the objective-c container 1247 /// scope for parsing/looking-up C constructs. 1248 /// 1249 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1250 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1251 void ActOnObjCReenterContainerContext(DeclContext *DC); 1252 1253 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1254 /// error parsing the definition of a tag. 1255 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1256 1257 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1258 EnumConstantDecl *LastEnumConst, 1259 SourceLocation IdLoc, 1260 IdentifierInfo *Id, 1261 Expr *val); 1262 1263 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1264 SourceLocation IdLoc, IdentifierInfo *Id, 1265 AttributeList *Attrs, 1266 SourceLocation EqualLoc, Expr *Val); 1267 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1268 SourceLocation RBraceLoc, Decl *EnumDecl, 1269 Decl **Elements, unsigned NumElements, 1270 Scope *S, AttributeList *Attr); 1271 1272 DeclContext *getContainingDC(DeclContext *DC); 1273 1274 /// Set the current declaration context until it gets popped. 1275 void PushDeclContext(Scope *S, DeclContext *DC); 1276 void PopDeclContext(); 1277 1278 /// EnterDeclaratorContext - Used when we must lookup names in the context 1279 /// of a declarator's nested name specifier. 1280 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1281 void ExitDeclaratorContext(Scope *S); 1282 1283 /// Push the parameters of D, which must be a function, into scope. 1284 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1285 void ActOnExitFunctionContext() { PopDeclContext(); } 1286 1287 DeclContext *getFunctionLevelDeclContext(); 1288 1289 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1290 /// to the function decl for the function being parsed. If we're currently 1291 /// in a 'block', this returns the containing context. 1292 FunctionDecl *getCurFunctionDecl(); 1293 1294 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1295 /// the method decl for the method being parsed. If we're currently 1296 /// in a 'block', this returns the containing context. 1297 ObjCMethodDecl *getCurMethodDecl(); 1298 1299 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1300 /// or C function we're in, otherwise return null. If we're currently 1301 /// in a 'block', this returns the containing context. 1302 NamedDecl *getCurFunctionOrMethodDecl(); 1303 1304 /// Add this decl to the scope shadowed decl chains. 1305 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1306 1307 /// \brief Make the given externally-produced declaration visible at the 1308 /// top level scope. 1309 /// 1310 /// \param D The externally-produced declaration to push. 1311 /// 1312 /// \param Name The name of the externally-produced declaration. 1313 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1314 1315 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1316 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1317 /// true if 'D' belongs to the given declaration context. 1318 /// 1319 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1320 /// whether the declaration is in scope for the purposes of explicit template 1321 /// instantiation or specialization. The default is false. 1322 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1323 bool ExplicitInstantiationOrSpecialization = false); 1324 1325 /// Finds the scope corresponding to the given decl context, if it 1326 /// happens to be an enclosing scope. Otherwise return NULL. 1327 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1328 1329 /// Subroutines of ActOnDeclarator(). 1330 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1331 TypeSourceInfo *TInfo); 1332 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1333 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1334 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1335 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1336 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1337 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1338 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1339 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1340 1341 // AssignmentAction - This is used by all the assignment diagnostic functions 1342 // to represent what is actually causing the operation 1343 enum AssignmentAction { 1344 AA_Assigning, 1345 AA_Passing, 1346 AA_Returning, 1347 AA_Converting, 1348 AA_Initializing, 1349 AA_Sending, 1350 AA_Casting 1351 }; 1352 1353 /// C++ Overloading. 1354 enum OverloadKind { 1355 /// This is a legitimate overload: the existing declarations are 1356 /// functions or function templates with different signatures. 1357 Ovl_Overload, 1358 1359 /// This is not an overload because the signature exactly matches 1360 /// an existing declaration. 1361 Ovl_Match, 1362 1363 /// This is not an overload because the lookup results contain a 1364 /// non-function. 1365 Ovl_NonFunction 1366 }; 1367 OverloadKind CheckOverload(Scope *S, 1368 FunctionDecl *New, 1369 const LookupResult &OldDecls, 1370 NamedDecl *&OldDecl, 1371 bool IsForUsingDecl); 1372 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1373 1374 /// \brief Checks availability of the function depending on the current 1375 /// function context.Inside an unavailable function,unavailability is ignored. 1376 /// 1377 /// \returns true if \arg FD is unavailable and current context is inside 1378 /// an available function, false otherwise. 1379 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1380 1381 ImplicitConversionSequence 1382 TryImplicitConversion(Expr *From, QualType ToType, 1383 bool SuppressUserConversions, 1384 bool AllowExplicit, 1385 bool InOverloadResolution, 1386 bool CStyle, 1387 bool AllowObjCWritebackConversion); 1388 1389 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1390 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1391 bool IsComplexPromotion(QualType FromType, QualType ToType); 1392 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1393 bool InOverloadResolution, 1394 QualType& ConvertedType, bool &IncompatibleObjC); 1395 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1396 QualType& ConvertedType, bool &IncompatibleObjC); 1397 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1398 QualType &ConvertedType); 1399 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1400 QualType& ConvertedType); 1401 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1402 const FunctionProtoType *NewType, 1403 unsigned *ArgPos = 0); 1404 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1405 QualType FromType, QualType ToType); 1406 1407 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1408 bool CheckPointerConversion(Expr *From, QualType ToType, 1409 CastKind &Kind, 1410 CXXCastPath& BasePath, 1411 bool IgnoreBaseAccess); 1412 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1413 bool InOverloadResolution, 1414 QualType &ConvertedType); 1415 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1416 CastKind &Kind, 1417 CXXCastPath &BasePath, 1418 bool IgnoreBaseAccess); 1419 bool IsQualificationConversion(QualType FromType, QualType ToType, 1420 bool CStyle, bool &ObjCLifetimeConversion); 1421 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1422 QualType &ResultTy); 1423 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1424 1425 1426 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1427 const VarDecl *NRVOCandidate, 1428 QualType ResultType, 1429 Expr *Value, 1430 bool AllowNRVO = true); 1431 1432 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1433 ExprResult Init); 1434 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1435 SourceLocation EqualLoc, 1436 ExprResult Init, 1437 bool TopLevelOfInitList = false); 1438 ExprResult PerformObjectArgumentInitialization(Expr *From, 1439 NestedNameSpecifier *Qualifier, 1440 NamedDecl *FoundDecl, 1441 CXXMethodDecl *Method); 1442 1443 ExprResult PerformContextuallyConvertToBool(Expr *From); 1444 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1445 1446 ExprResult 1447 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1448 const PartialDiagnostic &NotIntDiag, 1449 const PartialDiagnostic &IncompleteDiag, 1450 const PartialDiagnostic &ExplicitConvDiag, 1451 const PartialDiagnostic &ExplicitConvNote, 1452 const PartialDiagnostic &AmbigDiag, 1453 const PartialDiagnostic &AmbigNote, 1454 const PartialDiagnostic &ConvDiag); 1455 1456 ExprResult PerformObjectMemberConversion(Expr *From, 1457 NestedNameSpecifier *Qualifier, 1458 NamedDecl *FoundDecl, 1459 NamedDecl *Member); 1460 1461 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1462 // TODO: make this is a typesafe union. 1463 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1464 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1465 1466 void AddOverloadCandidate(NamedDecl *Function, 1467 DeclAccessPair FoundDecl, 1468 Expr **Args, unsigned NumArgs, 1469 OverloadCandidateSet &CandidateSet); 1470 1471 void AddOverloadCandidate(FunctionDecl *Function, 1472 DeclAccessPair FoundDecl, 1473 Expr **Args, unsigned NumArgs, 1474 OverloadCandidateSet& CandidateSet, 1475 bool SuppressUserConversions = false, 1476 bool PartialOverloading = false); 1477 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1478 Expr **Args, unsigned NumArgs, 1479 OverloadCandidateSet& CandidateSet, 1480 bool SuppressUserConversions = false); 1481 void AddMethodCandidate(DeclAccessPair FoundDecl, 1482 QualType ObjectType, 1483 Expr::Classification ObjectClassification, 1484 Expr **Args, unsigned NumArgs, 1485 OverloadCandidateSet& CandidateSet, 1486 bool SuppressUserConversion = false); 1487 void AddMethodCandidate(CXXMethodDecl *Method, 1488 DeclAccessPair FoundDecl, 1489 CXXRecordDecl *ActingContext, QualType ObjectType, 1490 Expr::Classification ObjectClassification, 1491 Expr **Args, unsigned NumArgs, 1492 OverloadCandidateSet& CandidateSet, 1493 bool SuppressUserConversions = false); 1494 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1495 DeclAccessPair FoundDecl, 1496 CXXRecordDecl *ActingContext, 1497 TemplateArgumentListInfo *ExplicitTemplateArgs, 1498 QualType ObjectType, 1499 Expr::Classification ObjectClassification, 1500 Expr **Args, unsigned NumArgs, 1501 OverloadCandidateSet& CandidateSet, 1502 bool SuppressUserConversions = false); 1503 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1504 DeclAccessPair FoundDecl, 1505 TemplateArgumentListInfo *ExplicitTemplateArgs, 1506 Expr **Args, unsigned NumArgs, 1507 OverloadCandidateSet& CandidateSet, 1508 bool SuppressUserConversions = false); 1509 void AddConversionCandidate(CXXConversionDecl *Conversion, 1510 DeclAccessPair FoundDecl, 1511 CXXRecordDecl *ActingContext, 1512 Expr *From, QualType ToType, 1513 OverloadCandidateSet& CandidateSet); 1514 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1515 DeclAccessPair FoundDecl, 1516 CXXRecordDecl *ActingContext, 1517 Expr *From, QualType ToType, 1518 OverloadCandidateSet &CandidateSet); 1519 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1520 DeclAccessPair FoundDecl, 1521 CXXRecordDecl *ActingContext, 1522 const FunctionProtoType *Proto, 1523 Expr *Object, Expr **Args, unsigned NumArgs, 1524 OverloadCandidateSet& CandidateSet); 1525 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1526 SourceLocation OpLoc, 1527 Expr **Args, unsigned NumArgs, 1528 OverloadCandidateSet& CandidateSet, 1529 SourceRange OpRange = SourceRange()); 1530 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1531 Expr **Args, unsigned NumArgs, 1532 OverloadCandidateSet& CandidateSet, 1533 bool IsAssignmentOperator = false, 1534 unsigned NumContextualBoolArguments = 0); 1535 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1536 SourceLocation OpLoc, 1537 Expr **Args, unsigned NumArgs, 1538 OverloadCandidateSet& CandidateSet); 1539 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1540 bool Operator, 1541 Expr **Args, unsigned NumArgs, 1542 TemplateArgumentListInfo *ExplicitTemplateArgs, 1543 OverloadCandidateSet& CandidateSet, 1544 bool PartialOverloading = false, 1545 bool StdNamespaceIsAssociated = false); 1546 1547 // Emit as a 'note' the specific overload candidate 1548 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1549 1550 // Emit as a series of 'note's all template and non-templates 1551 // identified by the expression Expr 1552 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1553 1554 // [PossiblyAFunctionType] --> [Return] 1555 // NonFunctionType --> NonFunctionType 1556 // R (A) --> R(A) 1557 // R (*)(A) --> R (A) 1558 // R (&)(A) --> R (A) 1559 // R (S::*)(A) --> R (A) 1560 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1561 1562 FunctionDecl * 1563 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1564 QualType TargetType, 1565 bool Complain, 1566 DeclAccessPair &Found, 1567 bool *pHadMultipleCandidates = 0); 1568 1569 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1570 bool Complain = false, 1571 DeclAccessPair* Found = 0); 1572 1573 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1574 ExprResult &SrcExpr, 1575 bool DoFunctionPointerConverion = false, 1576 bool Complain = false, 1577 const SourceRange& OpRangeForComplaining = SourceRange(), 1578 QualType DestTypeForComplaining = QualType(), 1579 unsigned DiagIDForComplaining = 0); 1580 1581 1582 Expr *FixOverloadedFunctionReference(Expr *E, 1583 DeclAccessPair FoundDecl, 1584 FunctionDecl *Fn); 1585 ExprResult FixOverloadedFunctionReference(ExprResult, 1586 DeclAccessPair FoundDecl, 1587 FunctionDecl *Fn); 1588 1589 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1590 Expr **Args, unsigned NumArgs, 1591 OverloadCandidateSet &CandidateSet, 1592 bool PartialOverloading = false); 1593 1594 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1595 UnresolvedLookupExpr *ULE, 1596 SourceLocation LParenLoc, 1597 Expr **Args, unsigned NumArgs, 1598 SourceLocation RParenLoc, 1599 Expr *ExecConfig); 1600 1601 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1602 unsigned Opc, 1603 const UnresolvedSetImpl &Fns, 1604 Expr *input); 1605 1606 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1607 unsigned Opc, 1608 const UnresolvedSetImpl &Fns, 1609 Expr *LHS, Expr *RHS); 1610 1611 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1612 SourceLocation RLoc, 1613 Expr *Base,Expr *Idx); 1614 1615 ExprResult 1616 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1617 SourceLocation LParenLoc, Expr **Args, 1618 unsigned NumArgs, SourceLocation RParenLoc); 1619 ExprResult 1620 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1621 Expr **Args, unsigned NumArgs, 1622 SourceLocation RParenLoc); 1623 1624 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1625 SourceLocation OpLoc); 1626 1627 /// CheckCallReturnType - Checks that a call expression's return type is 1628 /// complete. Returns true on failure. The location passed in is the location 1629 /// that best represents the call. 1630 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1631 CallExpr *CE, FunctionDecl *FD); 1632 1633 /// Helpers for dealing with blocks and functions. 1634 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1635 bool CheckParameterNames); 1636 void CheckCXXDefaultArguments(FunctionDecl *FD); 1637 void CheckExtraCXXDefaultArguments(Declarator &D); 1638 Scope *getNonFieldDeclScope(Scope *S); 1639 1640 /// \name Name lookup 1641 /// 1642 /// These routines provide name lookup that is used during semantic 1643 /// analysis to resolve the various kinds of names (identifiers, 1644 /// overloaded operator names, constructor names, etc.) into zero or 1645 /// more declarations within a particular scope. The major entry 1646 /// points are LookupName, which performs unqualified name lookup, 1647 /// and LookupQualifiedName, which performs qualified name lookup. 1648 /// 1649 /// All name lookup is performed based on some specific criteria, 1650 /// which specify what names will be visible to name lookup and how 1651 /// far name lookup should work. These criteria are important both 1652 /// for capturing language semantics (certain lookups will ignore 1653 /// certain names, for example) and for performance, since name 1654 /// lookup is often a bottleneck in the compilation of C++. Name 1655 /// lookup criteria is specified via the LookupCriteria enumeration. 1656 /// 1657 /// The results of name lookup can vary based on the kind of name 1658 /// lookup performed, the current language, and the translation 1659 /// unit. In C, for example, name lookup will either return nothing 1660 /// (no entity found) or a single declaration. In C++, name lookup 1661 /// can additionally refer to a set of overloaded functions or 1662 /// result in an ambiguity. All of the possible results of name 1663 /// lookup are captured by the LookupResult class, which provides 1664 /// the ability to distinguish among them. 1665 //@{ 1666 1667 /// @brief Describes the kind of name lookup to perform. 1668 enum LookupNameKind { 1669 /// Ordinary name lookup, which finds ordinary names (functions, 1670 /// variables, typedefs, etc.) in C and most kinds of names 1671 /// (functions, variables, members, types, etc.) in C++. 1672 LookupOrdinaryName = 0, 1673 /// Tag name lookup, which finds the names of enums, classes, 1674 /// structs, and unions. 1675 LookupTagName, 1676 /// Label name lookup. 1677 LookupLabel, 1678 /// Member name lookup, which finds the names of 1679 /// class/struct/union members. 1680 LookupMemberName, 1681 /// Look up of an operator name (e.g., operator+) for use with 1682 /// operator overloading. This lookup is similar to ordinary name 1683 /// lookup, but will ignore any declarations that are class members. 1684 LookupOperatorName, 1685 /// Look up of a name that precedes the '::' scope resolution 1686 /// operator in C++. This lookup completely ignores operator, object, 1687 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1688 LookupNestedNameSpecifierName, 1689 /// Look up a namespace name within a C++ using directive or 1690 /// namespace alias definition, ignoring non-namespace names (C++ 1691 /// [basic.lookup.udir]p1). 1692 LookupNamespaceName, 1693 /// Look up all declarations in a scope with the given name, 1694 /// including resolved using declarations. This is appropriate 1695 /// for checking redeclarations for a using declaration. 1696 LookupUsingDeclName, 1697 /// Look up an ordinary name that is going to be redeclared as a 1698 /// name with linkage. This lookup ignores any declarations that 1699 /// are outside of the current scope unless they have linkage. See 1700 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1701 LookupRedeclarationWithLinkage, 1702 /// Look up the name of an Objective-C protocol. 1703 LookupObjCProtocolName, 1704 /// Look up implicit 'self' parameter of an objective-c method. 1705 LookupObjCImplicitSelfParam, 1706 /// \brief Look up any declaration with any name. 1707 LookupAnyName 1708 }; 1709 1710 /// \brief Specifies whether (or how) name lookup is being performed for a 1711 /// redeclaration (vs. a reference). 1712 enum RedeclarationKind { 1713 /// \brief The lookup is a reference to this name that is not for the 1714 /// purpose of redeclaring the name. 1715 NotForRedeclaration = 0, 1716 /// \brief The lookup results will be used for redeclaration of a name, 1717 /// if an entity by that name already exists. 1718 ForRedeclaration 1719 }; 1720 1721private: 1722 bool CppLookupName(LookupResult &R, Scope *S); 1723 1724 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1725 CXXSpecialMember SM, 1726 bool ConstArg, 1727 bool VolatileArg, 1728 bool RValueThis, 1729 bool ConstThis, 1730 bool VolatileThis); 1731 1732 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1733 // 1734 // The boolean value will be true to indicate that the namespace was loaded 1735 // from an AST/PCH file, or false otherwise. 1736 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1737 1738 /// \brief Whether we have already loaded known namespaces from an extenal 1739 /// source. 1740 bool LoadedExternalKnownNamespaces; 1741 1742public: 1743 /// \brief Look up a name, looking for a single declaration. Return 1744 /// null if the results were absent, ambiguous, or overloaded. 1745 /// 1746 /// It is preferable to use the elaborated form and explicitly handle 1747 /// ambiguity and overloaded. 1748 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1749 SourceLocation Loc, 1750 LookupNameKind NameKind, 1751 RedeclarationKind Redecl 1752 = NotForRedeclaration); 1753 bool LookupName(LookupResult &R, Scope *S, 1754 bool AllowBuiltinCreation = false); 1755 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1756 bool InUnqualifiedLookup = false); 1757 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1758 bool AllowBuiltinCreation = false, 1759 bool EnteringContext = false); 1760 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1761 1762 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1763 QualType T1, QualType T2, 1764 UnresolvedSetImpl &Functions); 1765 1766 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1767 SourceLocation GnuLabelLoc = SourceLocation()); 1768 1769 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1770 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1771 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1772 unsigned Quals, 1773 bool *ConstParam = 0); 1774 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1775 bool RValueThis, unsigned ThisQuals, 1776 bool *ConstParam = 0); 1777 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1778 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1779 unsigned ThisQuals); 1780 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1781 1782 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1783 Expr **Args, unsigned NumArgs, 1784 ADLResult &Functions, 1785 bool StdNamespaceIsAssociated = false); 1786 1787 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1788 VisibleDeclConsumer &Consumer, 1789 bool IncludeGlobalScope = true); 1790 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1791 VisibleDeclConsumer &Consumer, 1792 bool IncludeGlobalScope = true); 1793 1794 /// \brief The context in which typo-correction occurs. 1795 /// 1796 /// The typo-correction context affects which keywords (if any) are 1797 /// considered when trying to correct for typos. 1798 enum CorrectTypoContext { 1799 /// \brief An unknown context, where any keyword might be valid. 1800 CTC_Unknown, 1801 /// \brief A context where no keywords are used (e.g. we expect an actual 1802 /// name). 1803 CTC_NoKeywords, 1804 /// \brief A context where we're correcting a type name. 1805 CTC_Type, 1806 /// \brief An expression context. 1807 CTC_Expression, 1808 /// \brief A type cast, or anything else that can be followed by a '<'. 1809 CTC_CXXCasts, 1810 /// \brief A member lookup context. 1811 CTC_MemberLookup, 1812 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1813 CTC_ObjCIvarLookup, 1814 /// \brief An Objective-C property lookup context (e.g., self.prop). 1815 CTC_ObjCPropertyLookup, 1816 /// \brief The receiver of an Objective-C message send within an 1817 /// Objective-C method where 'super' is a valid keyword. 1818 CTC_ObjCMessageReceiver 1819 }; 1820 1821 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1822 Sema::LookupNameKind LookupKind, 1823 Scope *S, CXXScopeSpec *SS, 1824 DeclContext *MemberContext = NULL, 1825 bool EnteringContext = false, 1826 CorrectTypoContext CTC = CTC_Unknown, 1827 const ObjCObjectPointerType *OPT = NULL); 1828 1829 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1830 AssociatedNamespaceSet &AssociatedNamespaces, 1831 AssociatedClassSet &AssociatedClasses); 1832 1833 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1834 bool ConsiderLinkage, 1835 bool ExplicitInstantiationOrSpecialization); 1836 1837 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1838 //@} 1839 1840 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1841 SourceLocation IdLoc, 1842 bool TypoCorrection = false); 1843 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1844 Scope *S, bool ForRedeclaration, 1845 SourceLocation Loc); 1846 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1847 Scope *S); 1848 void AddKnownFunctionAttributes(FunctionDecl *FD); 1849 1850 // More parsing and symbol table subroutines. 1851 1852 // Decl attributes - this routine is the top level dispatcher. 1853 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1854 bool NonInheritable = true, bool Inheritable = true); 1855 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1856 bool NonInheritable = true, bool Inheritable = true); 1857 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1858 const AttributeList *AttrList); 1859 1860 void checkUnusedDeclAttributes(Declarator &D); 1861 1862 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1863 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1864 bool CheckNoReturnAttr(const AttributeList &attr); 1865 1866 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1867 bool &IncompleteImpl, unsigned DiagID); 1868 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1869 ObjCMethodDecl *MethodDecl, 1870 bool IsProtocolMethodDecl); 1871 1872 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1873 ObjCMethodDecl *Overridden, 1874 bool IsProtocolMethodDecl); 1875 1876 /// WarnExactTypedMethods - This routine issues a warning if method 1877 /// implementation declaration matches exactly that of its declaration. 1878 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1879 ObjCMethodDecl *MethodDecl, 1880 bool IsProtocolMethodDecl); 1881 1882 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1883 ObjCInterfaceDecl *IDecl); 1884 1885 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1886 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1887 1888 /// CheckProtocolMethodDefs - This routine checks unimplemented 1889 /// methods declared in protocol, and those referenced by it. 1890 /// \param IDecl - Used for checking for methods which may have been 1891 /// inherited. 1892 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1893 ObjCProtocolDecl *PDecl, 1894 bool& IncompleteImpl, 1895 const SelectorSet &InsMap, 1896 const SelectorSet &ClsMap, 1897 ObjCContainerDecl *CDecl); 1898 1899 /// CheckImplementationIvars - This routine checks if the instance variables 1900 /// listed in the implelementation match those listed in the interface. 1901 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1902 ObjCIvarDecl **Fields, unsigned nIvars, 1903 SourceLocation Loc); 1904 1905 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1906 /// remains unimplemented in the class or category @implementation. 1907 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1908 ObjCContainerDecl* IDecl, 1909 bool IncompleteImpl = false); 1910 1911 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1912 /// which must be implemented by this implementation. 1913 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1914 ObjCContainerDecl *CDecl, 1915 const SelectorSet &InsMap); 1916 1917 /// DefaultSynthesizeProperties - This routine default synthesizes all 1918 /// properties which must be synthesized in class's @implementation. 1919 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1920 ObjCInterfaceDecl *IDecl); 1921 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1922 1923 /// CollectImmediateProperties - This routine collects all properties in 1924 /// the class and its conforming protocols; but not those it its super class. 1925 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1926 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1927 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1928 1929 1930 /// LookupPropertyDecl - Looks up a property in the current class and all 1931 /// its protocols. 1932 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1933 IdentifierInfo *II); 1934 1935 /// Called by ActOnProperty to handle @property declarations in 1936 //// class extensions. 1937 Decl *HandlePropertyInClassExtension(Scope *S, 1938 SourceLocation AtLoc, 1939 FieldDeclarator &FD, 1940 Selector GetterSel, 1941 Selector SetterSel, 1942 const bool isAssign, 1943 const bool isReadWrite, 1944 const unsigned Attributes, 1945 const unsigned AttributesAsWritten, 1946 bool *isOverridingProperty, 1947 TypeSourceInfo *T, 1948 tok::ObjCKeywordKind MethodImplKind); 1949 1950 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1951 /// handle creating the ObjcPropertyDecl for a category or @interface. 1952 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1953 ObjCContainerDecl *CDecl, 1954 SourceLocation AtLoc, 1955 FieldDeclarator &FD, 1956 Selector GetterSel, 1957 Selector SetterSel, 1958 const bool isAssign, 1959 const bool isReadWrite, 1960 const unsigned Attributes, 1961 const unsigned AttributesAsWritten, 1962 TypeSourceInfo *T, 1963 tok::ObjCKeywordKind MethodImplKind, 1964 DeclContext *lexicalDC = 0); 1965 1966 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1967 /// warning) when atomic property has one but not the other user-declared 1968 /// setter or getter. 1969 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1970 ObjCContainerDecl* IDecl); 1971 1972 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1973 1974 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1975 1976 enum MethodMatchStrategy { 1977 MMS_loose, 1978 MMS_strict 1979 }; 1980 1981 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1982 /// true, or false, accordingly. 1983 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1984 const ObjCMethodDecl *PrevMethod, 1985 MethodMatchStrategy strategy = MMS_strict); 1986 1987 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1988 /// or protocol against those declared in their implementations. 1989 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1990 const SelectorSet &ClsMap, 1991 SelectorSet &InsMapSeen, 1992 SelectorSet &ClsMapSeen, 1993 ObjCImplDecl* IMPDecl, 1994 ObjCContainerDecl* IDecl, 1995 bool &IncompleteImpl, 1996 bool ImmediateClass, 1997 bool WarnExactMatch=false); 1998 1999 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2000 /// category matches with those implemented in its primary class and 2001 /// warns each time an exact match is found. 2002 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2003 2004private: 2005 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2006 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2007 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2008 2009 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2010 /// optionally warns if there are multiple signatures. 2011 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2012 bool receiverIdOrClass, 2013 bool warn, bool instance); 2014 2015public: 2016 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2017 /// unit are added to a global pool. This allows us to efficiently associate 2018 /// a selector with a method declaraation for purposes of typechecking 2019 /// messages sent to "id" (where the class of the object is unknown). 2020 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2021 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2022 } 2023 2024 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2025 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2026 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2027 } 2028 2029 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2030 /// pool. 2031 void AddAnyMethodToGlobalPool(Decl *D); 2032 2033 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2034 /// there are multiple signatures. 2035 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2036 bool receiverIdOrClass=false, 2037 bool warn=true) { 2038 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2039 warn, /*instance*/true); 2040 } 2041 2042 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2043 /// there are multiple signatures. 2044 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2045 bool receiverIdOrClass=false, 2046 bool warn=true) { 2047 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2048 warn, /*instance*/false); 2049 } 2050 2051 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2052 /// implementation. 2053 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2054 2055 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2056 /// initialization. 2057 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2058 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2059 2060 //===--------------------------------------------------------------------===// 2061 // Statement Parsing Callbacks: SemaStmt.cpp. 2062public: 2063 class FullExprArg { 2064 public: 2065 FullExprArg(Sema &actions) : E(0) { } 2066 2067 // FIXME: The const_cast here is ugly. RValue references would make this 2068 // much nicer (or we could duplicate a bunch of the move semantics 2069 // emulation code from Ownership.h). 2070 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2071 2072 ExprResult release() { 2073 return move(E); 2074 } 2075 2076 Expr *get() const { return E; } 2077 2078 Expr *operator->() { 2079 return E; 2080 } 2081 2082 private: 2083 // FIXME: No need to make the entire Sema class a friend when it's just 2084 // Sema::MakeFullExpr that needs access to the constructor below. 2085 friend class Sema; 2086 2087 explicit FullExprArg(Expr *expr) : E(expr) {} 2088 2089 Expr *E; 2090 }; 2091 2092 FullExprArg MakeFullExpr(Expr *Arg) { 2093 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2094 } 2095 2096 StmtResult ActOnExprStmt(FullExprArg Expr); 2097 2098 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2099 bool HasLeadingEmptyMacro = false); 2100 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2101 MultiStmtArg Elts, 2102 bool isStmtExpr); 2103 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2104 SourceLocation StartLoc, 2105 SourceLocation EndLoc); 2106 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2107 StmtResult ActOnForEachLValueExpr(Expr *E); 2108 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2109 SourceLocation DotDotDotLoc, Expr *RHSVal, 2110 SourceLocation ColonLoc); 2111 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2112 2113 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2114 SourceLocation ColonLoc, 2115 Stmt *SubStmt, Scope *CurScope); 2116 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2117 SourceLocation ColonLoc, Stmt *SubStmt); 2118 2119 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2120 FullExprArg CondVal, Decl *CondVar, 2121 Stmt *ThenVal, 2122 SourceLocation ElseLoc, Stmt *ElseVal); 2123 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2124 Expr *Cond, 2125 Decl *CondVar); 2126 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2127 Stmt *Switch, Stmt *Body); 2128 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2129 FullExprArg Cond, 2130 Decl *CondVar, Stmt *Body); 2131 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2132 SourceLocation WhileLoc, 2133 SourceLocation CondLParen, Expr *Cond, 2134 SourceLocation CondRParen); 2135 2136 StmtResult ActOnForStmt(SourceLocation ForLoc, 2137 SourceLocation LParenLoc, 2138 Stmt *First, FullExprArg Second, 2139 Decl *SecondVar, 2140 FullExprArg Third, 2141 SourceLocation RParenLoc, 2142 Stmt *Body); 2143 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2144 Expr *collection); 2145 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2146 SourceLocation LParenLoc, 2147 Stmt *First, Expr *Second, 2148 SourceLocation RParenLoc, Stmt *Body); 2149 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2150 SourceLocation LParenLoc, Stmt *LoopVar, 2151 SourceLocation ColonLoc, Expr *Collection, 2152 SourceLocation RParenLoc); 2153 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2154 SourceLocation ColonLoc, 2155 Stmt *RangeDecl, Stmt *BeginEndDecl, 2156 Expr *Cond, Expr *Inc, 2157 Stmt *LoopVarDecl, 2158 SourceLocation RParenLoc); 2159 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2160 2161 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2162 SourceLocation LabelLoc, 2163 LabelDecl *TheDecl); 2164 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2165 SourceLocation StarLoc, 2166 Expr *DestExp); 2167 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2168 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2169 2170 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2171 bool AllowFunctionParameters); 2172 2173 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2174 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2175 2176 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2177 bool IsSimple, bool IsVolatile, 2178 unsigned NumOutputs, unsigned NumInputs, 2179 IdentifierInfo **Names, 2180 MultiExprArg Constraints, 2181 MultiExprArg Exprs, 2182 Expr *AsmString, 2183 MultiExprArg Clobbers, 2184 SourceLocation RParenLoc, 2185 bool MSAsm = false); 2186 2187 2188 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2189 SourceLocation StartLoc, 2190 SourceLocation IdLoc, IdentifierInfo *Id, 2191 bool Invalid = false); 2192 2193 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2194 2195 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2196 Decl *Parm, Stmt *Body); 2197 2198 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2199 2200 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2201 MultiStmtArg Catch, Stmt *Finally); 2202 2203 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2204 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2205 Scope *CurScope); 2206 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2207 Expr *operand); 2208 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2209 Expr *SynchExpr, 2210 Stmt *SynchBody); 2211 2212 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2213 2214 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2215 SourceLocation StartLoc, 2216 SourceLocation IdLoc, 2217 IdentifierInfo *Id); 2218 2219 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2220 2221 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2222 Decl *ExDecl, Stmt *HandlerBlock); 2223 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2224 MultiStmtArg Handlers); 2225 2226 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2227 SourceLocation TryLoc, 2228 Stmt *TryBlock, 2229 Stmt *Handler); 2230 2231 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2232 Expr *FilterExpr, 2233 Stmt *Block); 2234 2235 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2236 Stmt *Block); 2237 2238 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2239 2240 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2241 2242 /// \brief If it's a file scoped decl that must warn if not used, keep track 2243 /// of it. 2244 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2245 2246 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2247 /// whose result is unused, warn. 2248 void DiagnoseUnusedExprResult(const Stmt *S); 2249 void DiagnoseUnusedDecl(const NamedDecl *ND); 2250 2251 ParsingDeclState PushParsingDeclaration() { 2252 return DelayedDiagnostics.pushParsingDecl(); 2253 } 2254 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2255 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2256 } 2257 2258 typedef ProcessingContextState ParsingClassState; 2259 ParsingClassState PushParsingClass() { 2260 return DelayedDiagnostics.pushContext(); 2261 } 2262 void PopParsingClass(ParsingClassState state) { 2263 DelayedDiagnostics.popContext(state); 2264 } 2265 2266 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2267 SourceLocation Loc, 2268 const ObjCInterfaceDecl *UnknownObjCClass=0); 2269 2270 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2271 2272 bool makeUnavailableInSystemHeader(SourceLocation loc, 2273 StringRef message); 2274 2275 //===--------------------------------------------------------------------===// 2276 // Expression Parsing Callbacks: SemaExpr.cpp. 2277 2278 bool CanUseDecl(NamedDecl *D); 2279 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2280 const ObjCInterfaceDecl *UnknownObjCClass=0); 2281 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2282 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2283 ObjCMethodDecl *Getter, 2284 SourceLocation Loc); 2285 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2286 Expr **Args, unsigned NumArgs); 2287 2288 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2289 2290 void PopExpressionEvaluationContext(); 2291 2292 void DiscardCleanupsInEvaluationContext(); 2293 2294 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2295 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2296 void MarkDeclarationsReferencedInExpr(Expr *E); 2297 2298 /// \brief Try to recover by turning the given expression into a 2299 /// call. Returns true if recovery was attempted or an error was 2300 /// emitted; this may also leave the ExprResult invalid. 2301 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2302 bool ForceComplain = false, 2303 bool (*IsPlausibleResult)(QualType) = 0); 2304 2305 /// \brief Figure out if an expression could be turned into a call. 2306 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2307 UnresolvedSetImpl &NonTemplateOverloads); 2308 2309 /// \brief Conditionally issue a diagnostic based on the current 2310 /// evaluation context. 2311 /// 2312 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2313 /// the function body is parsed, and then do a basic reachability analysis to 2314 /// determine if the statement is reachable. If it is unreachable, the 2315 /// diagnostic will not be emitted. 2316 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2317 const PartialDiagnostic &PD); 2318 2319 // Primary Expressions. 2320 SourceRange getExprRange(Expr *E) const; 2321 2322 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2323 bool HasTrailingLParen, bool IsAddressOfOperand); 2324 2325 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2326 TemplateArgumentListInfo &Buffer, 2327 DeclarationNameInfo &NameInfo, 2328 const TemplateArgumentListInfo *&TemplateArgs); 2329 2330 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2331 CorrectTypoContext CTC = CTC_Unknown, 2332 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2333 Expr **Args = 0, unsigned NumArgs = 0); 2334 2335 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2336 IdentifierInfo *II, 2337 bool AllowBuiltinCreation=false); 2338 2339 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2340 const DeclarationNameInfo &NameInfo, 2341 bool isAddressOfOperand, 2342 const TemplateArgumentListInfo *TemplateArgs); 2343 2344 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2345 ExprValueKind VK, 2346 SourceLocation Loc, 2347 const CXXScopeSpec *SS = 0); 2348 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2349 ExprValueKind VK, 2350 const DeclarationNameInfo &NameInfo, 2351 const CXXScopeSpec *SS = 0); 2352 ExprResult 2353 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2354 SourceLocation nameLoc, 2355 IndirectFieldDecl *indirectField, 2356 Expr *baseObjectExpr = 0, 2357 SourceLocation opLoc = SourceLocation()); 2358 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2359 LookupResult &R, 2360 const TemplateArgumentListInfo *TemplateArgs); 2361 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2362 LookupResult &R, 2363 const TemplateArgumentListInfo *TemplateArgs, 2364 bool IsDefiniteInstance); 2365 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2366 const LookupResult &R, 2367 bool HasTrailingLParen); 2368 2369 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2370 const DeclarationNameInfo &NameInfo); 2371 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2372 const DeclarationNameInfo &NameInfo, 2373 const TemplateArgumentListInfo *TemplateArgs); 2374 2375 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2376 LookupResult &R, 2377 bool NeedsADL); 2378 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2379 const DeclarationNameInfo &NameInfo, 2380 NamedDecl *D); 2381 2382 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2383 ExprResult ActOnNumericConstant(const Token &Tok); 2384 ExprResult ActOnCharacterConstant(const Token &Tok); 2385 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2386 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2387 SourceLocation R, 2388 MultiExprArg Val); 2389 2390 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2391 /// fragments (e.g. "foo" "bar" L"baz"). 2392 ExprResult ActOnStringLiteral(const Token *StringToks, 2393 unsigned NumStringToks); 2394 2395 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2396 SourceLocation DefaultLoc, 2397 SourceLocation RParenLoc, 2398 Expr *ControllingExpr, 2399 MultiTypeArg ArgTypes, 2400 MultiExprArg ArgExprs); 2401 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2402 SourceLocation DefaultLoc, 2403 SourceLocation RParenLoc, 2404 Expr *ControllingExpr, 2405 TypeSourceInfo **Types, 2406 Expr **Exprs, 2407 unsigned NumAssocs); 2408 2409 // Binary/Unary Operators. 'Tok' is the token for the operator. 2410 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2411 Expr *InputExpr); 2412 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2413 UnaryOperatorKind Opc, Expr *Input); 2414 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2415 tok::TokenKind Op, Expr *Input); 2416 2417 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2418 SourceLocation OpLoc, 2419 UnaryExprOrTypeTrait ExprKind, 2420 SourceRange R); 2421 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2422 UnaryExprOrTypeTrait ExprKind); 2423 ExprResult 2424 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2425 UnaryExprOrTypeTrait ExprKind, 2426 bool IsType, void *TyOrEx, 2427 const SourceRange &ArgRange); 2428 2429 ExprResult CheckPlaceholderExpr(Expr *E); 2430 bool CheckVecStepExpr(Expr *E); 2431 2432 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2433 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2434 SourceRange ExprRange, 2435 UnaryExprOrTypeTrait ExprKind); 2436 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2437 SourceLocation OpLoc, 2438 IdentifierInfo &Name, 2439 SourceLocation NameLoc, 2440 SourceLocation RParenLoc); 2441 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2442 tok::TokenKind Kind, Expr *Input); 2443 2444 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2445 Expr *Idx, SourceLocation RLoc); 2446 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2447 Expr *Idx, SourceLocation RLoc); 2448 2449 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2450 SourceLocation OpLoc, bool IsArrow, 2451 CXXScopeSpec &SS, 2452 NamedDecl *FirstQualifierInScope, 2453 const DeclarationNameInfo &NameInfo, 2454 const TemplateArgumentListInfo *TemplateArgs); 2455 2456 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2457 SourceLocation OpLoc, bool IsArrow, 2458 const CXXScopeSpec &SS, 2459 NamedDecl *FirstQualifierInScope, 2460 LookupResult &R, 2461 const TemplateArgumentListInfo *TemplateArgs, 2462 bool SuppressQualifierCheck = false); 2463 2464 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2465 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2466 bool &IsArrow, SourceLocation OpLoc, 2467 CXXScopeSpec &SS, 2468 Decl *ObjCImpDecl, 2469 bool HasTemplateArgs); 2470 2471 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2472 const CXXScopeSpec &SS, 2473 const LookupResult &R); 2474 2475 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2476 bool IsArrow, SourceLocation OpLoc, 2477 const CXXScopeSpec &SS, 2478 NamedDecl *FirstQualifierInScope, 2479 const DeclarationNameInfo &NameInfo, 2480 const TemplateArgumentListInfo *TemplateArgs); 2481 2482 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2483 SourceLocation OpLoc, 2484 tok::TokenKind OpKind, 2485 CXXScopeSpec &SS, 2486 UnqualifiedId &Member, 2487 Decl *ObjCImpDecl, 2488 bool HasTrailingLParen); 2489 2490 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2491 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2492 FunctionDecl *FDecl, 2493 const FunctionProtoType *Proto, 2494 Expr **Args, unsigned NumArgs, 2495 SourceLocation RParenLoc, 2496 bool ExecConfig = false); 2497 void CheckStaticArrayArgument(SourceLocation CallLoc, 2498 ParmVarDecl *Param, 2499 const Expr *ArgExpr); 2500 2501 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2502 /// This provides the location of the left/right parens and a list of comma 2503 /// locations. 2504 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2505 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2506 Expr *ExecConfig = 0, bool IsExecConfig = false); 2507 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2508 SourceLocation LParenLoc, 2509 Expr **Args, unsigned NumArgs, 2510 SourceLocation RParenLoc, 2511 Expr *Config = 0, 2512 bool IsExecConfig = false); 2513 2514 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2515 MultiExprArg ExecConfig, 2516 SourceLocation GGGLoc); 2517 2518 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2519 Declarator &D, ParsedType &Ty, 2520 SourceLocation RParenLoc, Expr *CastExpr); 2521 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2522 TypeSourceInfo *Ty, 2523 SourceLocation RParenLoc, 2524 Expr *Op); 2525 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2526 2527 /// \brief Build an altivec or OpenCL literal. 2528 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2529 SourceLocation RParenLoc, Expr *E, 2530 TypeSourceInfo *TInfo); 2531 2532 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2533 2534 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2535 ParsedType Ty, 2536 SourceLocation RParenLoc, 2537 Expr *InitExpr); 2538 2539 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2540 TypeSourceInfo *TInfo, 2541 SourceLocation RParenLoc, 2542 Expr *LiteralExpr); 2543 2544 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2545 MultiExprArg InitArgList, 2546 SourceLocation RBraceLoc); 2547 2548 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2549 SourceLocation Loc, 2550 bool GNUSyntax, 2551 ExprResult Init); 2552 2553 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2554 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2555 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2556 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2557 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2558 Expr *LHSExpr, Expr *RHSExpr); 2559 2560 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2561 /// in the case of a the GNU conditional expr extension. 2562 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2563 SourceLocation ColonLoc, 2564 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2565 2566 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2567 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2568 LabelDecl *TheDecl); 2569 2570 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2571 SourceLocation RPLoc); // "({..})" 2572 2573 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2574 struct OffsetOfComponent { 2575 SourceLocation LocStart, LocEnd; 2576 bool isBrackets; // true if [expr], false if .ident 2577 union { 2578 IdentifierInfo *IdentInfo; 2579 Expr *E; 2580 } U; 2581 }; 2582 2583 /// __builtin_offsetof(type, a.b[123][456].c) 2584 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2585 TypeSourceInfo *TInfo, 2586 OffsetOfComponent *CompPtr, 2587 unsigned NumComponents, 2588 SourceLocation RParenLoc); 2589 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2590 SourceLocation BuiltinLoc, 2591 SourceLocation TypeLoc, 2592 ParsedType ParsedArgTy, 2593 OffsetOfComponent *CompPtr, 2594 unsigned NumComponents, 2595 SourceLocation RParenLoc); 2596 2597 // __builtin_choose_expr(constExpr, expr1, expr2) 2598 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2599 Expr *CondExpr, Expr *LHSExpr, 2600 Expr *RHSExpr, SourceLocation RPLoc); 2601 2602 // __builtin_va_arg(expr, type) 2603 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2604 SourceLocation RPLoc); 2605 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2606 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2607 2608 // __null 2609 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2610 2611 bool CheckCaseExpression(Expr *E); 2612 2613 /// \brief Describes the result of an "if-exists" condition check. 2614 enum IfExistsResult { 2615 /// \brief The symbol exists. 2616 IER_Exists, 2617 2618 /// \brief The symbol does not exist. 2619 IER_DoesNotExist, 2620 2621 /// \brief The name is a dependent name, so the results will differ 2622 /// from one instantiation to the next. 2623 IER_Dependent, 2624 2625 /// \brief An error occurred. 2626 IER_Error 2627 }; 2628 2629 IfExistsResult 2630 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2631 const DeclarationNameInfo &TargetNameInfo); 2632 2633 IfExistsResult 2634 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2635 bool IsIfExists, CXXScopeSpec &SS, 2636 UnqualifiedId &Name); 2637 2638 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2639 bool IsIfExists, 2640 NestedNameSpecifierLoc QualifierLoc, 2641 DeclarationNameInfo NameInfo, 2642 Stmt *Nested); 2643 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2644 bool IsIfExists, 2645 CXXScopeSpec &SS, UnqualifiedId &Name, 2646 Stmt *Nested); 2647 2648 //===------------------------- "Block" Extension ------------------------===// 2649 2650 /// ActOnBlockStart - This callback is invoked when a block literal is 2651 /// started. 2652 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2653 2654 /// ActOnBlockArguments - This callback allows processing of block arguments. 2655 /// If there are no arguments, this is still invoked. 2656 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2657 2658 /// ActOnBlockError - If there is an error parsing a block, this callback 2659 /// is invoked to pop the information about the block from the action impl. 2660 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2661 2662 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2663 /// literal was successfully completed. ^(int x){...} 2664 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2665 Scope *CurScope); 2666 2667 //===---------------------------- OpenCL Features -----------------------===// 2668 2669 /// __builtin_astype(...) 2670 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2671 SourceLocation BuiltinLoc, 2672 SourceLocation RParenLoc); 2673 2674 //===---------------------------- C++ Features --------------------------===// 2675 2676 // Act on C++ namespaces 2677 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2678 SourceLocation NamespaceLoc, 2679 SourceLocation IdentLoc, 2680 IdentifierInfo *Ident, 2681 SourceLocation LBrace, 2682 AttributeList *AttrList); 2683 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2684 2685 NamespaceDecl *getStdNamespace() const; 2686 NamespaceDecl *getOrCreateStdNamespace(); 2687 2688 CXXRecordDecl *getStdBadAlloc() const; 2689 2690 Decl *ActOnUsingDirective(Scope *CurScope, 2691 SourceLocation UsingLoc, 2692 SourceLocation NamespcLoc, 2693 CXXScopeSpec &SS, 2694 SourceLocation IdentLoc, 2695 IdentifierInfo *NamespcName, 2696 AttributeList *AttrList); 2697 2698 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2699 2700 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2701 SourceLocation NamespaceLoc, 2702 SourceLocation AliasLoc, 2703 IdentifierInfo *Alias, 2704 CXXScopeSpec &SS, 2705 SourceLocation IdentLoc, 2706 IdentifierInfo *Ident); 2707 2708 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2709 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2710 const LookupResult &PreviousDecls); 2711 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2712 NamedDecl *Target); 2713 2714 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2715 bool isTypeName, 2716 const CXXScopeSpec &SS, 2717 SourceLocation NameLoc, 2718 const LookupResult &Previous); 2719 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2720 const CXXScopeSpec &SS, 2721 SourceLocation NameLoc); 2722 2723 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2724 SourceLocation UsingLoc, 2725 CXXScopeSpec &SS, 2726 const DeclarationNameInfo &NameInfo, 2727 AttributeList *AttrList, 2728 bool IsInstantiation, 2729 bool IsTypeName, 2730 SourceLocation TypenameLoc); 2731 2732 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2733 2734 Decl *ActOnUsingDeclaration(Scope *CurScope, 2735 AccessSpecifier AS, 2736 bool HasUsingKeyword, 2737 SourceLocation UsingLoc, 2738 CXXScopeSpec &SS, 2739 UnqualifiedId &Name, 2740 AttributeList *AttrList, 2741 bool IsTypeName, 2742 SourceLocation TypenameLoc); 2743 Decl *ActOnAliasDeclaration(Scope *CurScope, 2744 AccessSpecifier AS, 2745 MultiTemplateParamsArg TemplateParams, 2746 SourceLocation UsingLoc, 2747 UnqualifiedId &Name, 2748 TypeResult Type); 2749 2750 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2751 /// ActOnDeclarator, when a C++ direct initializer is present. 2752 /// e.g: "int x(1);" 2753 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2754 SourceLocation LParenLoc, 2755 MultiExprArg Exprs, 2756 SourceLocation RParenLoc, 2757 bool TypeMayContainAuto); 2758 2759 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2760 /// and sets it as the initializer for the the passed in VarDecl. 2761 bool InitializeVarWithConstructor(VarDecl *VD, 2762 CXXConstructorDecl *Constructor, 2763 MultiExprArg Exprs, 2764 bool HadMultipleCandidates); 2765 2766 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2767 /// including handling of its default argument expressions. 2768 /// 2769 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2770 ExprResult 2771 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2772 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2773 bool HadMultipleCandidates, bool RequiresZeroInit, 2774 unsigned ConstructKind, SourceRange ParenRange); 2775 2776 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2777 // the constructor can be elidable? 2778 ExprResult 2779 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2780 CXXConstructorDecl *Constructor, bool Elidable, 2781 MultiExprArg Exprs, bool HadMultipleCandidates, 2782 bool RequiresZeroInit, unsigned ConstructKind, 2783 SourceRange ParenRange); 2784 2785 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2786 /// the default expr if needed. 2787 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2788 FunctionDecl *FD, 2789 ParmVarDecl *Param); 2790 2791 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2792 /// constructed variable. 2793 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2794 2795 /// \brief Helper class that collects exception specifications for 2796 /// implicitly-declared special member functions. 2797 class ImplicitExceptionSpecification { 2798 // Pointer to allow copying 2799 ASTContext *Context; 2800 // We order exception specifications thus: 2801 // noexcept is the most restrictive, but is only used in C++0x. 2802 // throw() comes next. 2803 // Then a throw(collected exceptions) 2804 // Finally no specification. 2805 // throw(...) is used instead if any called function uses it. 2806 // 2807 // If this exception specification cannot be known yet (for instance, 2808 // because this is the exception specification for a defaulted default 2809 // constructor and we haven't finished parsing the deferred parts of the 2810 // class yet), the C++0x standard does not specify how to behave. We 2811 // record this as an 'unknown' exception specification, which overrules 2812 // any other specification (even 'none', to keep this rule simple). 2813 ExceptionSpecificationType ComputedEST; 2814 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2815 SmallVector<QualType, 4> Exceptions; 2816 2817 void ClearExceptions() { 2818 ExceptionsSeen.clear(); 2819 Exceptions.clear(); 2820 } 2821 2822 public: 2823 explicit ImplicitExceptionSpecification(ASTContext &Context) 2824 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2825 if (!Context.getLangOptions().CPlusPlus0x) 2826 ComputedEST = EST_DynamicNone; 2827 } 2828 2829 /// \brief Get the computed exception specification type. 2830 ExceptionSpecificationType getExceptionSpecType() const { 2831 assert(ComputedEST != EST_ComputedNoexcept && 2832 "noexcept(expr) should not be a possible result"); 2833 return ComputedEST; 2834 } 2835 2836 /// \brief The number of exceptions in the exception specification. 2837 unsigned size() const { return Exceptions.size(); } 2838 2839 /// \brief The set of exceptions in the exception specification. 2840 const QualType *data() const { return Exceptions.data(); } 2841 2842 /// \brief Integrate another called method into the collected data. 2843 void CalledDecl(CXXMethodDecl *Method); 2844 2845 /// \brief Integrate an invoked expression into the collected data. 2846 void CalledExpr(Expr *E); 2847 2848 /// \brief Specify that the exception specification can't be detemined yet. 2849 void SetDelayed() { 2850 ClearExceptions(); 2851 ComputedEST = EST_Delayed; 2852 } 2853 2854 FunctionProtoType::ExtProtoInfo getEPI() const { 2855 FunctionProtoType::ExtProtoInfo EPI; 2856 EPI.ExceptionSpecType = getExceptionSpecType(); 2857 EPI.NumExceptions = size(); 2858 EPI.Exceptions = data(); 2859 return EPI; 2860 } 2861 }; 2862 2863 /// \brief Determine what sort of exception specification a defaulted 2864 /// copy constructor of a class will have. 2865 ImplicitExceptionSpecification 2866 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2867 2868 /// \brief Determine what sort of exception specification a defaulted 2869 /// default constructor of a class will have, and whether the parameter 2870 /// will be const. 2871 std::pair<ImplicitExceptionSpecification, bool> 2872 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2873 2874 /// \brief Determine what sort of exception specification a defautled 2875 /// copy assignment operator of a class will have, and whether the 2876 /// parameter will be const. 2877 std::pair<ImplicitExceptionSpecification, bool> 2878 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2879 2880 /// \brief Determine what sort of exception specification a defaulted move 2881 /// constructor of a class will have. 2882 ImplicitExceptionSpecification 2883 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2884 2885 /// \brief Determine what sort of exception specification a defaulted move 2886 /// assignment operator of a class will have. 2887 ImplicitExceptionSpecification 2888 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2889 2890 /// \brief Determine what sort of exception specification a defaulted 2891 /// destructor of a class will have. 2892 ImplicitExceptionSpecification 2893 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2894 2895 /// \brief Determine if a special member function should have a deleted 2896 /// definition when it is defaulted. 2897 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2898 2899 /// \brief Determine if a defaulted copy assignment operator ought to be 2900 /// deleted. 2901 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2902 2903 /// \brief Determine if a defaulted move assignment operator ought to be 2904 /// deleted. 2905 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2906 2907 /// \brief Determine if a defaulted destructor ought to be deleted. 2908 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2909 2910 /// \brief Declare the implicit default constructor for the given class. 2911 /// 2912 /// \param ClassDecl The class declaration into which the implicit 2913 /// default constructor will be added. 2914 /// 2915 /// \returns The implicitly-declared default constructor. 2916 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2917 CXXRecordDecl *ClassDecl); 2918 2919 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2920 /// defining this constructor as the default constructor. 2921 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2922 CXXConstructorDecl *Constructor); 2923 2924 /// \brief Declare the implicit destructor for the given class. 2925 /// 2926 /// \param ClassDecl The class declaration into which the implicit 2927 /// destructor will be added. 2928 /// 2929 /// \returns The implicitly-declared destructor. 2930 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2931 2932 /// DefineImplicitDestructor - Checks for feasibility of 2933 /// defining this destructor as the default destructor. 2934 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2935 CXXDestructorDecl *Destructor); 2936 2937 /// \brief Build an exception spec for destructors that don't have one. 2938 /// 2939 /// C++11 says that user-defined destructors with no exception spec get one 2940 /// that looks as if the destructor was implicitly declared. 2941 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2942 CXXDestructorDecl *Destructor); 2943 2944 /// \brief Declare all inherited constructors for the given class. 2945 /// 2946 /// \param ClassDecl The class declaration into which the inherited 2947 /// constructors will be added. 2948 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2949 2950 /// \brief Declare the implicit copy constructor for the given class. 2951 /// 2952 /// \param ClassDecl The class declaration into which the implicit 2953 /// copy constructor will be added. 2954 /// 2955 /// \returns The implicitly-declared copy constructor. 2956 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2957 2958 /// DefineImplicitCopyConstructor - Checks for feasibility of 2959 /// defining this constructor as the copy constructor. 2960 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2961 CXXConstructorDecl *Constructor); 2962 2963 /// \brief Declare the implicit move constructor for the given class. 2964 /// 2965 /// \param ClassDecl The Class declaration into which the implicit 2966 /// move constructor will be added. 2967 /// 2968 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2969 /// declared. 2970 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2971 2972 /// DefineImplicitMoveConstructor - Checks for feasibility of 2973 /// defining this constructor as the move constructor. 2974 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2975 CXXConstructorDecl *Constructor); 2976 2977 /// \brief Declare the implicit copy assignment operator for the given class. 2978 /// 2979 /// \param ClassDecl The class declaration into which the implicit 2980 /// copy assignment operator will be added. 2981 /// 2982 /// \returns The implicitly-declared copy assignment operator. 2983 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2984 2985 /// \brief Defines an implicitly-declared copy assignment operator. 2986 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2987 CXXMethodDecl *MethodDecl); 2988 2989 /// \brief Declare the implicit move assignment operator for the given class. 2990 /// 2991 /// \param ClassDecl The Class declaration into which the implicit 2992 /// move assignment operator will be added. 2993 /// 2994 /// \returns The implicitly-declared move assignment operator, or NULL if it 2995 /// wasn't declared. 2996 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2997 2998 /// \brief Defines an implicitly-declared move assignment operator. 2999 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3000 CXXMethodDecl *MethodDecl); 3001 3002 /// \brief Force the declaration of any implicitly-declared members of this 3003 /// class. 3004 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3005 3006 /// MaybeBindToTemporary - If the passed in expression has a record type with 3007 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3008 /// it simply returns the passed in expression. 3009 ExprResult MaybeBindToTemporary(Expr *E); 3010 3011 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3012 MultiExprArg ArgsPtr, 3013 SourceLocation Loc, 3014 ASTOwningVector<Expr*> &ConvertedArgs); 3015 3016 ParsedType getDestructorName(SourceLocation TildeLoc, 3017 IdentifierInfo &II, SourceLocation NameLoc, 3018 Scope *S, CXXScopeSpec &SS, 3019 ParsedType ObjectType, 3020 bool EnteringContext); 3021 3022 // Checks that reinterpret casts don't have undefined behavior. 3023 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3024 bool IsDereference, SourceRange Range); 3025 3026 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3027 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3028 tok::TokenKind Kind, 3029 SourceLocation LAngleBracketLoc, 3030 Declarator &D, 3031 SourceLocation RAngleBracketLoc, 3032 SourceLocation LParenLoc, 3033 Expr *E, 3034 SourceLocation RParenLoc); 3035 3036 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3037 tok::TokenKind Kind, 3038 TypeSourceInfo *Ty, 3039 Expr *E, 3040 SourceRange AngleBrackets, 3041 SourceRange Parens); 3042 3043 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3044 SourceLocation TypeidLoc, 3045 TypeSourceInfo *Operand, 3046 SourceLocation RParenLoc); 3047 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3048 SourceLocation TypeidLoc, 3049 Expr *Operand, 3050 SourceLocation RParenLoc); 3051 3052 /// ActOnCXXTypeid - Parse typeid( something ). 3053 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3054 SourceLocation LParenLoc, bool isType, 3055 void *TyOrExpr, 3056 SourceLocation RParenLoc); 3057 3058 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3059 SourceLocation TypeidLoc, 3060 TypeSourceInfo *Operand, 3061 SourceLocation RParenLoc); 3062 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3063 SourceLocation TypeidLoc, 3064 Expr *Operand, 3065 SourceLocation RParenLoc); 3066 3067 /// ActOnCXXUuidof - Parse __uuidof( something ). 3068 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3069 SourceLocation LParenLoc, bool isType, 3070 void *TyOrExpr, 3071 SourceLocation RParenLoc); 3072 3073 3074 //// ActOnCXXThis - Parse 'this' pointer. 3075 ExprResult ActOnCXXThis(SourceLocation loc); 3076 3077 /// \brief Try to retrieve the type of the 'this' pointer. 3078 /// 3079 /// \param Capture If true, capture 'this' in this context. 3080 /// 3081 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3082 QualType getCurrentThisType(bool Capture = true); 3083 3084 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3085 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3086 3087 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3088 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3089 3090 //// ActOnCXXThrow - Parse throw expressions. 3091 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3092 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3093 bool IsThrownVarInScope); 3094 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3095 bool IsThrownVarInScope); 3096 3097 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3098 /// Can be interpreted either as function-style casting ("int(x)") 3099 /// or class type construction ("ClassType(x,y,z)") 3100 /// or creation of a value-initialized type ("int()"). 3101 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3102 SourceLocation LParenLoc, 3103 MultiExprArg Exprs, 3104 SourceLocation RParenLoc); 3105 3106 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3107 SourceLocation LParenLoc, 3108 MultiExprArg Exprs, 3109 SourceLocation RParenLoc); 3110 3111 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3112 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3113 SourceLocation PlacementLParen, 3114 MultiExprArg PlacementArgs, 3115 SourceLocation PlacementRParen, 3116 SourceRange TypeIdParens, Declarator &D, 3117 SourceLocation ConstructorLParen, 3118 MultiExprArg ConstructorArgs, 3119 SourceLocation ConstructorRParen); 3120 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3121 SourceLocation PlacementLParen, 3122 MultiExprArg PlacementArgs, 3123 SourceLocation PlacementRParen, 3124 SourceRange TypeIdParens, 3125 QualType AllocType, 3126 TypeSourceInfo *AllocTypeInfo, 3127 Expr *ArraySize, 3128 SourceLocation ConstructorLParen, 3129 MultiExprArg ConstructorArgs, 3130 SourceLocation ConstructorRParen, 3131 bool TypeMayContainAuto = true); 3132 3133 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3134 SourceRange R); 3135 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3136 bool UseGlobal, QualType AllocType, bool IsArray, 3137 Expr **PlaceArgs, unsigned NumPlaceArgs, 3138 FunctionDecl *&OperatorNew, 3139 FunctionDecl *&OperatorDelete); 3140 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3141 DeclarationName Name, Expr** Args, 3142 unsigned NumArgs, DeclContext *Ctx, 3143 bool AllowMissing, FunctionDecl *&Operator, 3144 bool Diagnose = true); 3145 void DeclareGlobalNewDelete(); 3146 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3147 QualType Argument, 3148 bool addMallocAttr = false); 3149 3150 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3151 DeclarationName Name, FunctionDecl* &Operator, 3152 bool Diagnose = true); 3153 3154 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3155 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3156 bool UseGlobal, bool ArrayForm, 3157 Expr *Operand); 3158 3159 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3160 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3161 SourceLocation StmtLoc, 3162 bool ConvertToBoolean); 3163 3164 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3165 Expr *Operand, SourceLocation RParen); 3166 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3167 SourceLocation RParen); 3168 3169 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3170 /// pseudo-functions. 3171 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3172 SourceLocation KWLoc, 3173 ParsedType Ty, 3174 SourceLocation RParen); 3175 3176 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3177 SourceLocation KWLoc, 3178 TypeSourceInfo *T, 3179 SourceLocation RParen); 3180 3181 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3182 /// pseudo-functions. 3183 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3184 SourceLocation KWLoc, 3185 ParsedType LhsTy, 3186 ParsedType RhsTy, 3187 SourceLocation RParen); 3188 3189 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3190 SourceLocation KWLoc, 3191 TypeSourceInfo *LhsT, 3192 TypeSourceInfo *RhsT, 3193 SourceLocation RParen); 3194 3195 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3196 /// pseudo-functions. 3197 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3198 SourceLocation KWLoc, 3199 ParsedType LhsTy, 3200 Expr *DimExpr, 3201 SourceLocation RParen); 3202 3203 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3204 SourceLocation KWLoc, 3205 TypeSourceInfo *TSInfo, 3206 Expr *DimExpr, 3207 SourceLocation RParen); 3208 3209 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3210 /// pseudo-functions. 3211 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3212 SourceLocation KWLoc, 3213 Expr *Queried, 3214 SourceLocation RParen); 3215 3216 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3217 SourceLocation KWLoc, 3218 Expr *Queried, 3219 SourceLocation RParen); 3220 3221 ExprResult ActOnStartCXXMemberReference(Scope *S, 3222 Expr *Base, 3223 SourceLocation OpLoc, 3224 tok::TokenKind OpKind, 3225 ParsedType &ObjectType, 3226 bool &MayBePseudoDestructor); 3227 3228 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3229 3230 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3231 SourceLocation OpLoc, 3232 tok::TokenKind OpKind, 3233 const CXXScopeSpec &SS, 3234 TypeSourceInfo *ScopeType, 3235 SourceLocation CCLoc, 3236 SourceLocation TildeLoc, 3237 PseudoDestructorTypeStorage DestroyedType, 3238 bool HasTrailingLParen); 3239 3240 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3241 SourceLocation OpLoc, 3242 tok::TokenKind OpKind, 3243 CXXScopeSpec &SS, 3244 UnqualifiedId &FirstTypeName, 3245 SourceLocation CCLoc, 3246 SourceLocation TildeLoc, 3247 UnqualifiedId &SecondTypeName, 3248 bool HasTrailingLParen); 3249 3250 /// MaybeCreateExprWithCleanups - If the current full-expression 3251 /// requires any cleanups, surround it with a ExprWithCleanups node. 3252 /// Otherwise, just returns the passed-in expression. 3253 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3254 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3255 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3256 3257 ExprResult ActOnFinishFullExpr(Expr *Expr); 3258 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3259 3260 // Marks SS invalid if it represents an incomplete type. 3261 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3262 3263 DeclContext *computeDeclContext(QualType T); 3264 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3265 bool EnteringContext = false); 3266 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3267 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3268 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3269 3270 /// \brief The parser has parsed a global nested-name-specifier '::'. 3271 /// 3272 /// \param S The scope in which this nested-name-specifier occurs. 3273 /// 3274 /// \param CCLoc The location of the '::'. 3275 /// 3276 /// \param SS The nested-name-specifier, which will be updated in-place 3277 /// to reflect the parsed nested-name-specifier. 3278 /// 3279 /// \returns true if an error occurred, false otherwise. 3280 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3281 CXXScopeSpec &SS); 3282 3283 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3284 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3285 3286 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3287 SourceLocation IdLoc, 3288 IdentifierInfo &II, 3289 ParsedType ObjectType); 3290 3291 bool BuildCXXNestedNameSpecifier(Scope *S, 3292 IdentifierInfo &Identifier, 3293 SourceLocation IdentifierLoc, 3294 SourceLocation CCLoc, 3295 QualType ObjectType, 3296 bool EnteringContext, 3297 CXXScopeSpec &SS, 3298 NamedDecl *ScopeLookupResult, 3299 bool ErrorRecoveryLookup); 3300 3301 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3302 /// 3303 /// \param S The scope in which this nested-name-specifier occurs. 3304 /// 3305 /// \param Identifier The identifier preceding the '::'. 3306 /// 3307 /// \param IdentifierLoc The location of the identifier. 3308 /// 3309 /// \param CCLoc The location of the '::'. 3310 /// 3311 /// \param ObjectType The type of the object, if we're parsing 3312 /// nested-name-specifier in a member access expression. 3313 /// 3314 /// \param EnteringContext Whether we're entering the context nominated by 3315 /// this nested-name-specifier. 3316 /// 3317 /// \param SS The nested-name-specifier, which is both an input 3318 /// parameter (the nested-name-specifier before this type) and an 3319 /// output parameter (containing the full nested-name-specifier, 3320 /// including this new type). 3321 /// 3322 /// \returns true if an error occurred, false otherwise. 3323 bool ActOnCXXNestedNameSpecifier(Scope *S, 3324 IdentifierInfo &Identifier, 3325 SourceLocation IdentifierLoc, 3326 SourceLocation CCLoc, 3327 ParsedType ObjectType, 3328 bool EnteringContext, 3329 CXXScopeSpec &SS); 3330 3331 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3332 IdentifierInfo &Identifier, 3333 SourceLocation IdentifierLoc, 3334 SourceLocation ColonLoc, 3335 ParsedType ObjectType, 3336 bool EnteringContext); 3337 3338 /// \brief The parser has parsed a nested-name-specifier 3339 /// 'template[opt] template-name < template-args >::'. 3340 /// 3341 /// \param S The scope in which this nested-name-specifier occurs. 3342 /// 3343 /// \param TemplateLoc The location of the 'template' keyword, if any. 3344 /// 3345 /// \param SS The nested-name-specifier, which is both an input 3346 /// parameter (the nested-name-specifier before this type) and an 3347 /// output parameter (containing the full nested-name-specifier, 3348 /// including this new type). 3349 /// 3350 /// \param TemplateLoc the location of the 'template' keyword, if any. 3351 /// \param TemplateName The template name. 3352 /// \param TemplateNameLoc The location of the template name. 3353 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3354 /// \param TemplateArgs The template arguments. 3355 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3356 /// \param CCLoc The location of the '::'. 3357 3358 /// \param EnteringContext Whether we're entering the context of the 3359 /// nested-name-specifier. 3360 /// 3361 /// 3362 /// \returns true if an error occurred, false otherwise. 3363 bool ActOnCXXNestedNameSpecifier(Scope *S, 3364 SourceLocation TemplateLoc, 3365 CXXScopeSpec &SS, 3366 TemplateTy Template, 3367 SourceLocation TemplateNameLoc, 3368 SourceLocation LAngleLoc, 3369 ASTTemplateArgsPtr TemplateArgs, 3370 SourceLocation RAngleLoc, 3371 SourceLocation CCLoc, 3372 bool EnteringContext); 3373 3374 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3375 /// that the parser can use later to reconstruct the given 3376 /// nested-name-specifier. 3377 /// 3378 /// \param SS A nested-name-specifier. 3379 /// 3380 /// \returns A pointer containing all of the information in the 3381 /// nested-name-specifier \p SS. 3382 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3383 3384 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3385 /// the nested-name-specifier structure. 3386 /// 3387 /// \param Annotation The annotation pointer, produced by 3388 /// \c SaveNestedNameSpecifierAnnotation(). 3389 /// 3390 /// \param AnnotationRange The source range corresponding to the annotation. 3391 /// 3392 /// \param SS The nested-name-specifier that will be updated with the contents 3393 /// of the annotation pointer. 3394 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3395 SourceRange AnnotationRange, 3396 CXXScopeSpec &SS); 3397 3398 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3399 3400 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3401 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3402 /// After this method is called, according to [C++ 3.4.3p3], names should be 3403 /// looked up in the declarator-id's scope, until the declarator is parsed and 3404 /// ActOnCXXExitDeclaratorScope is called. 3405 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3406 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3407 3408 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3409 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3410 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3411 /// Used to indicate that names should revert to being looked up in the 3412 /// defining scope. 3413 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3414 3415 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3416 /// initializer for the declaration 'Dcl'. 3417 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3418 /// static data member of class X, names should be looked up in the scope of 3419 /// class X. 3420 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3421 3422 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3423 /// initializer for the declaration 'Dcl'. 3424 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3425 3426 // ParseObjCStringLiteral - Parse Objective-C string literals. 3427 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3428 Expr **Strings, 3429 unsigned NumStrings); 3430 3431 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3432 TypeSourceInfo *EncodedTypeInfo, 3433 SourceLocation RParenLoc); 3434 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3435 CXXMethodDecl *Method, 3436 bool HadMultipleCandidates); 3437 3438 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3439 SourceLocation EncodeLoc, 3440 SourceLocation LParenLoc, 3441 ParsedType Ty, 3442 SourceLocation RParenLoc); 3443 3444 // ParseObjCSelectorExpression - Build selector expression for @selector 3445 ExprResult ParseObjCSelectorExpression(Selector Sel, 3446 SourceLocation AtLoc, 3447 SourceLocation SelLoc, 3448 SourceLocation LParenLoc, 3449 SourceLocation RParenLoc); 3450 3451 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3452 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3453 SourceLocation AtLoc, 3454 SourceLocation ProtoLoc, 3455 SourceLocation LParenLoc, 3456 SourceLocation RParenLoc); 3457 3458 //===--------------------------------------------------------------------===// 3459 // C++ Declarations 3460 // 3461 Decl *ActOnStartLinkageSpecification(Scope *S, 3462 SourceLocation ExternLoc, 3463 SourceLocation LangLoc, 3464 StringRef Lang, 3465 SourceLocation LBraceLoc); 3466 Decl *ActOnFinishLinkageSpecification(Scope *S, 3467 Decl *LinkageSpec, 3468 SourceLocation RBraceLoc); 3469 3470 3471 //===--------------------------------------------------------------------===// 3472 // C++ Classes 3473 // 3474 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3475 const CXXScopeSpec *SS = 0); 3476 3477 bool ActOnAccessSpecifier(AccessSpecifier Access, 3478 SourceLocation ASLoc, 3479 SourceLocation ColonLoc, 3480 AttributeList *Attrs = 0); 3481 3482 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3483 Declarator &D, 3484 MultiTemplateParamsArg TemplateParameterLists, 3485 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3486 bool HasDeferredInit); 3487 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3488 Expr *Init); 3489 3490 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3491 Scope *S, 3492 CXXScopeSpec &SS, 3493 IdentifierInfo *MemberOrBase, 3494 ParsedType TemplateTypeTy, 3495 SourceLocation IdLoc, 3496 SourceLocation LParenLoc, 3497 Expr **Args, unsigned NumArgs, 3498 SourceLocation RParenLoc, 3499 SourceLocation EllipsisLoc); 3500 3501 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3502 Scope *S, 3503 CXXScopeSpec &SS, 3504 IdentifierInfo *MemberOrBase, 3505 ParsedType TemplateTypeTy, 3506 SourceLocation IdLoc, 3507 Expr *InitList, 3508 SourceLocation EllipsisLoc); 3509 3510 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3511 Scope *S, 3512 CXXScopeSpec &SS, 3513 IdentifierInfo *MemberOrBase, 3514 ParsedType TemplateTypeTy, 3515 SourceLocation IdLoc, 3516 const MultiInitializer &Init, 3517 SourceLocation EllipsisLoc); 3518 3519 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3520 const MultiInitializer &Args, 3521 SourceLocation IdLoc); 3522 3523 MemInitResult BuildBaseInitializer(QualType BaseType, 3524 TypeSourceInfo *BaseTInfo, 3525 const MultiInitializer &Args, 3526 CXXRecordDecl *ClassDecl, 3527 SourceLocation EllipsisLoc); 3528 3529 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3530 const MultiInitializer &Args, 3531 CXXRecordDecl *ClassDecl); 3532 3533 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3534 CXXCtorInitializer *Initializer); 3535 3536 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3537 CXXCtorInitializer **Initializers, 3538 unsigned NumInitializers, bool AnyErrors); 3539 3540 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3541 3542 3543 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3544 /// mark all the non-trivial destructors of its members and bases as 3545 /// referenced. 3546 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3547 CXXRecordDecl *Record); 3548 3549 /// \brief The list of classes whose vtables have been used within 3550 /// this translation unit, and the source locations at which the 3551 /// first use occurred. 3552 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3553 3554 /// \brief The list of vtables that are required but have not yet been 3555 /// materialized. 3556 SmallVector<VTableUse, 16> VTableUses; 3557 3558 /// \brief The set of classes whose vtables have been used within 3559 /// this translation unit, and a bit that will be true if the vtable is 3560 /// required to be emitted (otherwise, it should be emitted only if needed 3561 /// by code generation). 3562 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3563 3564 /// \brief Load any externally-stored vtable uses. 3565 void LoadExternalVTableUses(); 3566 3567 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3568 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3569 DynamicClassesType; 3570 3571 /// \brief A list of all of the dynamic classes in this translation 3572 /// unit. 3573 DynamicClassesType DynamicClasses; 3574 3575 /// \brief Note that the vtable for the given class was used at the 3576 /// given location. 3577 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3578 bool DefinitionRequired = false); 3579 3580 /// MarkVirtualMembersReferenced - Will mark all members of the given 3581 /// CXXRecordDecl referenced. 3582 void MarkVirtualMembersReferenced(SourceLocation Loc, 3583 const CXXRecordDecl *RD); 3584 3585 /// \brief Define all of the vtables that have been used in this 3586 /// translation unit and reference any virtual members used by those 3587 /// vtables. 3588 /// 3589 /// \returns true if any work was done, false otherwise. 3590 bool DefineUsedVTables(); 3591 3592 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3593 3594 void ActOnMemInitializers(Decl *ConstructorDecl, 3595 SourceLocation ColonLoc, 3596 CXXCtorInitializer **MemInits, 3597 unsigned NumMemInits, 3598 bool AnyErrors); 3599 3600 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3601 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3602 Decl *TagDecl, 3603 SourceLocation LBrac, 3604 SourceLocation RBrac, 3605 AttributeList *AttrList); 3606 3607 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3608 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3609 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3610 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3611 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3612 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3613 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3614 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3615 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3616 bool IsInsideALocalClassWithinATemplateFunction(); 3617 3618 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3619 Expr *AssertExpr, 3620 Expr *AssertMessageExpr, 3621 SourceLocation RParenLoc); 3622 3623 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3624 SourceLocation FriendLoc, 3625 TypeSourceInfo *TSInfo); 3626 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3627 MultiTemplateParamsArg TemplateParams); 3628 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3629 MultiTemplateParamsArg TemplateParams); 3630 3631 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3632 StorageClass& SC); 3633 void CheckConstructor(CXXConstructorDecl *Constructor); 3634 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3635 StorageClass& SC); 3636 bool CheckDestructor(CXXDestructorDecl *Destructor); 3637 void CheckConversionDeclarator(Declarator &D, QualType &R, 3638 StorageClass& SC); 3639 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3640 3641 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3642 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3643 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3644 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3645 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3646 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3647 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3648 3649 //===--------------------------------------------------------------------===// 3650 // C++ Derived Classes 3651 // 3652 3653 /// ActOnBaseSpecifier - Parsed a base specifier 3654 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3655 SourceRange SpecifierRange, 3656 bool Virtual, AccessSpecifier Access, 3657 TypeSourceInfo *TInfo, 3658 SourceLocation EllipsisLoc); 3659 3660 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3661 SourceRange SpecifierRange, 3662 bool Virtual, AccessSpecifier Access, 3663 ParsedType basetype, 3664 SourceLocation BaseLoc, 3665 SourceLocation EllipsisLoc); 3666 3667 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3668 unsigned NumBases); 3669 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3670 unsigned NumBases); 3671 3672 bool IsDerivedFrom(QualType Derived, QualType Base); 3673 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3674 3675 // FIXME: I don't like this name. 3676 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3677 3678 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3679 3680 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3681 SourceLocation Loc, SourceRange Range, 3682 CXXCastPath *BasePath = 0, 3683 bool IgnoreAccess = false); 3684 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3685 unsigned InaccessibleBaseID, 3686 unsigned AmbigiousBaseConvID, 3687 SourceLocation Loc, SourceRange Range, 3688 DeclarationName Name, 3689 CXXCastPath *BasePath); 3690 3691 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3692 3693 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3694 /// covariant, according to C++ [class.virtual]p5. 3695 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3696 const CXXMethodDecl *Old); 3697 3698 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3699 /// spec is a subset of base spec. 3700 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3701 const CXXMethodDecl *Old); 3702 3703 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3704 3705 /// CheckOverrideControl - Check C++0x override control semantics. 3706 void CheckOverrideControl(const Decl *D); 3707 3708 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3709 /// overrides a virtual member function marked 'final', according to 3710 /// C++0x [class.virtual]p3. 3711 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3712 const CXXMethodDecl *Old); 3713 3714 3715 //===--------------------------------------------------------------------===// 3716 // C++ Access Control 3717 // 3718 3719 enum AccessResult { 3720 AR_accessible, 3721 AR_inaccessible, 3722 AR_dependent, 3723 AR_delayed 3724 }; 3725 3726 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3727 NamedDecl *PrevMemberDecl, 3728 AccessSpecifier LexicalAS); 3729 3730 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3731 DeclAccessPair FoundDecl); 3732 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3733 DeclAccessPair FoundDecl); 3734 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3735 SourceRange PlacementRange, 3736 CXXRecordDecl *NamingClass, 3737 DeclAccessPair FoundDecl, 3738 bool Diagnose = true); 3739 AccessResult CheckConstructorAccess(SourceLocation Loc, 3740 CXXConstructorDecl *D, 3741 const InitializedEntity &Entity, 3742 AccessSpecifier Access, 3743 bool IsCopyBindingRefToTemp = false); 3744 AccessResult CheckConstructorAccess(SourceLocation Loc, 3745 CXXConstructorDecl *D, 3746 AccessSpecifier Access, 3747 PartialDiagnostic PD); 3748 AccessResult CheckDestructorAccess(SourceLocation Loc, 3749 CXXDestructorDecl *Dtor, 3750 const PartialDiagnostic &PDiag); 3751 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3752 NamedDecl *D, 3753 const PartialDiagnostic &PDiag); 3754 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3755 Expr *ObjectExpr, 3756 Expr *ArgExpr, 3757 DeclAccessPair FoundDecl); 3758 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3759 DeclAccessPair FoundDecl); 3760 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3761 QualType Base, QualType Derived, 3762 const CXXBasePath &Path, 3763 unsigned DiagID, 3764 bool ForceCheck = false, 3765 bool ForceUnprivileged = false); 3766 void CheckLookupAccess(const LookupResult &R); 3767 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3768 3769 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3770 const MultiLevelTemplateArgumentList &TemplateArgs); 3771 void PerformDependentDiagnostics(const DeclContext *Pattern, 3772 const MultiLevelTemplateArgumentList &TemplateArgs); 3773 3774 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3775 3776 /// A flag to suppress access checking. 3777 bool SuppressAccessChecking; 3778 3779 /// \brief When true, access checking violations are treated as SFINAE 3780 /// failures rather than hard errors. 3781 bool AccessCheckingSFINAE; 3782 3783 void ActOnStartSuppressingAccessChecks(); 3784 void ActOnStopSuppressingAccessChecks(); 3785 3786 enum AbstractDiagSelID { 3787 AbstractNone = -1, 3788 AbstractReturnType, 3789 AbstractParamType, 3790 AbstractVariableType, 3791 AbstractFieldType, 3792 AbstractArrayType 3793 }; 3794 3795 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3796 const PartialDiagnostic &PD); 3797 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3798 3799 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3800 AbstractDiagSelID SelID = AbstractNone); 3801 3802 //===--------------------------------------------------------------------===// 3803 // C++ Overloaded Operators [C++ 13.5] 3804 // 3805 3806 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3807 3808 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3809 3810 //===--------------------------------------------------------------------===// 3811 // C++ Templates [C++ 14] 3812 // 3813 void FilterAcceptableTemplateNames(LookupResult &R); 3814 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3815 3816 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3817 QualType ObjectType, bool EnteringContext, 3818 bool &MemberOfUnknownSpecialization); 3819 3820 TemplateNameKind isTemplateName(Scope *S, 3821 CXXScopeSpec &SS, 3822 bool hasTemplateKeyword, 3823 UnqualifiedId &Name, 3824 ParsedType ObjectType, 3825 bool EnteringContext, 3826 TemplateTy &Template, 3827 bool &MemberOfUnknownSpecialization); 3828 3829 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3830 SourceLocation IILoc, 3831 Scope *S, 3832 const CXXScopeSpec *SS, 3833 TemplateTy &SuggestedTemplate, 3834 TemplateNameKind &SuggestedKind); 3835 3836 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3837 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3838 3839 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3840 SourceLocation EllipsisLoc, 3841 SourceLocation KeyLoc, 3842 IdentifierInfo *ParamName, 3843 SourceLocation ParamNameLoc, 3844 unsigned Depth, unsigned Position, 3845 SourceLocation EqualLoc, 3846 ParsedType DefaultArg); 3847 3848 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3849 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3850 unsigned Depth, 3851 unsigned Position, 3852 SourceLocation EqualLoc, 3853 Expr *DefaultArg); 3854 Decl *ActOnTemplateTemplateParameter(Scope *S, 3855 SourceLocation TmpLoc, 3856 TemplateParameterList *Params, 3857 SourceLocation EllipsisLoc, 3858 IdentifierInfo *ParamName, 3859 SourceLocation ParamNameLoc, 3860 unsigned Depth, 3861 unsigned Position, 3862 SourceLocation EqualLoc, 3863 ParsedTemplateArgument DefaultArg); 3864 3865 TemplateParameterList * 3866 ActOnTemplateParameterList(unsigned Depth, 3867 SourceLocation ExportLoc, 3868 SourceLocation TemplateLoc, 3869 SourceLocation LAngleLoc, 3870 Decl **Params, unsigned NumParams, 3871 SourceLocation RAngleLoc); 3872 3873 /// \brief The context in which we are checking a template parameter 3874 /// list. 3875 enum TemplateParamListContext { 3876 TPC_ClassTemplate, 3877 TPC_FunctionTemplate, 3878 TPC_ClassTemplateMember, 3879 TPC_FriendFunctionTemplate, 3880 TPC_FriendFunctionTemplateDefinition, 3881 TPC_TypeAliasTemplate 3882 }; 3883 3884 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3885 TemplateParameterList *OldParams, 3886 TemplateParamListContext TPC); 3887 TemplateParameterList * 3888 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3889 SourceLocation DeclLoc, 3890 const CXXScopeSpec &SS, 3891 TemplateParameterList **ParamLists, 3892 unsigned NumParamLists, 3893 bool IsFriend, 3894 bool &IsExplicitSpecialization, 3895 bool &Invalid); 3896 3897 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3898 SourceLocation KWLoc, CXXScopeSpec &SS, 3899 IdentifierInfo *Name, SourceLocation NameLoc, 3900 AttributeList *Attr, 3901 TemplateParameterList *TemplateParams, 3902 AccessSpecifier AS, 3903 SourceLocation ModulePrivateLoc, 3904 unsigned NumOuterTemplateParamLists, 3905 TemplateParameterList **OuterTemplateParamLists); 3906 3907 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3908 TemplateArgumentListInfo &Out); 3909 3910 void NoteAllFoundTemplates(TemplateName Name); 3911 3912 QualType CheckTemplateIdType(TemplateName Template, 3913 SourceLocation TemplateLoc, 3914 TemplateArgumentListInfo &TemplateArgs); 3915 3916 TypeResult 3917 ActOnTemplateIdType(CXXScopeSpec &SS, 3918 TemplateTy Template, SourceLocation TemplateLoc, 3919 SourceLocation LAngleLoc, 3920 ASTTemplateArgsPtr TemplateArgs, 3921 SourceLocation RAngleLoc); 3922 3923 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3924 /// such as \c class T::template apply<U>. 3925 /// 3926 /// \param TUK 3927 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3928 TypeSpecifierType TagSpec, 3929 SourceLocation TagLoc, 3930 CXXScopeSpec &SS, 3931 TemplateTy TemplateD, 3932 SourceLocation TemplateLoc, 3933 SourceLocation LAngleLoc, 3934 ASTTemplateArgsPtr TemplateArgsIn, 3935 SourceLocation RAngleLoc); 3936 3937 3938 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3939 LookupResult &R, 3940 bool RequiresADL, 3941 const TemplateArgumentListInfo &TemplateArgs); 3942 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3943 const DeclarationNameInfo &NameInfo, 3944 const TemplateArgumentListInfo &TemplateArgs); 3945 3946 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3947 SourceLocation TemplateKWLoc, 3948 CXXScopeSpec &SS, 3949 UnqualifiedId &Name, 3950 ParsedType ObjectType, 3951 bool EnteringContext, 3952 TemplateTy &Template); 3953 3954 DeclResult 3955 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3956 SourceLocation KWLoc, 3957 SourceLocation ModulePrivateLoc, 3958 CXXScopeSpec &SS, 3959 TemplateTy Template, 3960 SourceLocation TemplateNameLoc, 3961 SourceLocation LAngleLoc, 3962 ASTTemplateArgsPtr TemplateArgs, 3963 SourceLocation RAngleLoc, 3964 AttributeList *Attr, 3965 MultiTemplateParamsArg TemplateParameterLists); 3966 3967 Decl *ActOnTemplateDeclarator(Scope *S, 3968 MultiTemplateParamsArg TemplateParameterLists, 3969 Declarator &D); 3970 3971 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3972 MultiTemplateParamsArg TemplateParameterLists, 3973 Declarator &D); 3974 3975 bool 3976 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3977 TemplateSpecializationKind NewTSK, 3978 NamedDecl *PrevDecl, 3979 TemplateSpecializationKind PrevTSK, 3980 SourceLocation PrevPtOfInstantiation, 3981 bool &SuppressNew); 3982 3983 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3984 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3985 LookupResult &Previous); 3986 3987 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3988 TemplateArgumentListInfo *ExplicitTemplateArgs, 3989 LookupResult &Previous); 3990 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3991 3992 DeclResult 3993 ActOnExplicitInstantiation(Scope *S, 3994 SourceLocation ExternLoc, 3995 SourceLocation TemplateLoc, 3996 unsigned TagSpec, 3997 SourceLocation KWLoc, 3998 const CXXScopeSpec &SS, 3999 TemplateTy Template, 4000 SourceLocation TemplateNameLoc, 4001 SourceLocation LAngleLoc, 4002 ASTTemplateArgsPtr TemplateArgs, 4003 SourceLocation RAngleLoc, 4004 AttributeList *Attr); 4005 4006 DeclResult 4007 ActOnExplicitInstantiation(Scope *S, 4008 SourceLocation ExternLoc, 4009 SourceLocation TemplateLoc, 4010 unsigned TagSpec, 4011 SourceLocation KWLoc, 4012 CXXScopeSpec &SS, 4013 IdentifierInfo *Name, 4014 SourceLocation NameLoc, 4015 AttributeList *Attr); 4016 4017 DeclResult ActOnExplicitInstantiation(Scope *S, 4018 SourceLocation ExternLoc, 4019 SourceLocation TemplateLoc, 4020 Declarator &D); 4021 4022 TemplateArgumentLoc 4023 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4024 SourceLocation TemplateLoc, 4025 SourceLocation RAngleLoc, 4026 Decl *Param, 4027 SmallVectorImpl<TemplateArgument> &Converted); 4028 4029 /// \brief Specifies the context in which a particular template 4030 /// argument is being checked. 4031 enum CheckTemplateArgumentKind { 4032 /// \brief The template argument was specified in the code or was 4033 /// instantiated with some deduced template arguments. 4034 CTAK_Specified, 4035 4036 /// \brief The template argument was deduced via template argument 4037 /// deduction. 4038 CTAK_Deduced, 4039 4040 /// \brief The template argument was deduced from an array bound 4041 /// via template argument deduction. 4042 CTAK_DeducedFromArrayBound 4043 }; 4044 4045 bool CheckTemplateArgument(NamedDecl *Param, 4046 const TemplateArgumentLoc &Arg, 4047 NamedDecl *Template, 4048 SourceLocation TemplateLoc, 4049 SourceLocation RAngleLoc, 4050 unsigned ArgumentPackIndex, 4051 SmallVectorImpl<TemplateArgument> &Converted, 4052 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4053 4054 /// \brief Check that the given template arguments can be be provided to 4055 /// the given template, converting the arguments along the way. 4056 /// 4057 /// \param Template The template to which the template arguments are being 4058 /// provided. 4059 /// 4060 /// \param TemplateLoc The location of the template name in the source. 4061 /// 4062 /// \param TemplateArgs The list of template arguments. If the template is 4063 /// a template template parameter, this function may extend the set of 4064 /// template arguments to also include substituted, defaulted template 4065 /// arguments. 4066 /// 4067 /// \param PartialTemplateArgs True if the list of template arguments is 4068 /// intentionally partial, e.g., because we're checking just the initial 4069 /// set of template arguments. 4070 /// 4071 /// \param Converted Will receive the converted, canonicalized template 4072 /// arguments. 4073 /// 4074 /// \returns True if an error occurred, false otherwise. 4075 bool CheckTemplateArgumentList(TemplateDecl *Template, 4076 SourceLocation TemplateLoc, 4077 TemplateArgumentListInfo &TemplateArgs, 4078 bool PartialTemplateArgs, 4079 SmallVectorImpl<TemplateArgument> &Converted); 4080 4081 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4082 const TemplateArgumentLoc &Arg, 4083 SmallVectorImpl<TemplateArgument> &Converted); 4084 4085 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4086 TypeSourceInfo *Arg); 4087 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4088 TemplateArgument &Converted); 4089 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4090 QualType InstantiatedParamType, Expr *Arg, 4091 TemplateArgument &Converted, 4092 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4093 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4094 const TemplateArgumentLoc &Arg); 4095 4096 ExprResult 4097 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4098 QualType ParamType, 4099 SourceLocation Loc); 4100 ExprResult 4101 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4102 SourceLocation Loc); 4103 4104 /// \brief Enumeration describing how template parameter lists are compared 4105 /// for equality. 4106 enum TemplateParameterListEqualKind { 4107 /// \brief We are matching the template parameter lists of two templates 4108 /// that might be redeclarations. 4109 /// 4110 /// \code 4111 /// template<typename T> struct X; 4112 /// template<typename T> struct X; 4113 /// \endcode 4114 TPL_TemplateMatch, 4115 4116 /// \brief We are matching the template parameter lists of two template 4117 /// template parameters as part of matching the template parameter lists 4118 /// of two templates that might be redeclarations. 4119 /// 4120 /// \code 4121 /// template<template<int I> class TT> struct X; 4122 /// template<template<int Value> class Other> struct X; 4123 /// \endcode 4124 TPL_TemplateTemplateParmMatch, 4125 4126 /// \brief We are matching the template parameter lists of a template 4127 /// template argument against the template parameter lists of a template 4128 /// template parameter. 4129 /// 4130 /// \code 4131 /// template<template<int Value> class Metafun> struct X; 4132 /// template<int Value> struct integer_c; 4133 /// X<integer_c> xic; 4134 /// \endcode 4135 TPL_TemplateTemplateArgumentMatch 4136 }; 4137 4138 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4139 TemplateParameterList *Old, 4140 bool Complain, 4141 TemplateParameterListEqualKind Kind, 4142 SourceLocation TemplateArgLoc 4143 = SourceLocation()); 4144 4145 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4146 4147 /// \brief Called when the parser has parsed a C++ typename 4148 /// specifier, e.g., "typename T::type". 4149 /// 4150 /// \param S The scope in which this typename type occurs. 4151 /// \param TypenameLoc the location of the 'typename' keyword 4152 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4153 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4154 /// \param IdLoc the location of the identifier. 4155 TypeResult 4156 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4157 const CXXScopeSpec &SS, const IdentifierInfo &II, 4158 SourceLocation IdLoc); 4159 4160 /// \brief Called when the parser has parsed a C++ typename 4161 /// specifier that ends in a template-id, e.g., 4162 /// "typename MetaFun::template apply<T1, T2>". 4163 /// 4164 /// \param S The scope in which this typename type occurs. 4165 /// \param TypenameLoc the location of the 'typename' keyword 4166 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4167 /// \param TemplateLoc the location of the 'template' keyword, if any. 4168 /// \param TemplateName The template name. 4169 /// \param TemplateNameLoc The location of the template name. 4170 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4171 /// \param TemplateArgs The template arguments. 4172 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4173 TypeResult 4174 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4175 const CXXScopeSpec &SS, 4176 SourceLocation TemplateLoc, 4177 TemplateTy Template, 4178 SourceLocation TemplateNameLoc, 4179 SourceLocation LAngleLoc, 4180 ASTTemplateArgsPtr TemplateArgs, 4181 SourceLocation RAngleLoc); 4182 4183 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4184 SourceLocation KeywordLoc, 4185 NestedNameSpecifierLoc QualifierLoc, 4186 const IdentifierInfo &II, 4187 SourceLocation IILoc); 4188 4189 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4190 SourceLocation Loc, 4191 DeclarationName Name); 4192 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4193 4194 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4195 bool RebuildTemplateParamsInCurrentInstantiation( 4196 TemplateParameterList *Params); 4197 4198 std::string 4199 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4200 const TemplateArgumentList &Args); 4201 4202 std::string 4203 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4204 const TemplateArgument *Args, 4205 unsigned NumArgs); 4206 4207 //===--------------------------------------------------------------------===// 4208 // C++ Variadic Templates (C++0x [temp.variadic]) 4209 //===--------------------------------------------------------------------===// 4210 4211 /// \brief The context in which an unexpanded parameter pack is 4212 /// being diagnosed. 4213 /// 4214 /// Note that the values of this enumeration line up with the first 4215 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4216 enum UnexpandedParameterPackContext { 4217 /// \brief An arbitrary expression. 4218 UPPC_Expression = 0, 4219 4220 /// \brief The base type of a class type. 4221 UPPC_BaseType, 4222 4223 /// \brief The type of an arbitrary declaration. 4224 UPPC_DeclarationType, 4225 4226 /// \brief The type of a data member. 4227 UPPC_DataMemberType, 4228 4229 /// \brief The size of a bit-field. 4230 UPPC_BitFieldWidth, 4231 4232 /// \brief The expression in a static assertion. 4233 UPPC_StaticAssertExpression, 4234 4235 /// \brief The fixed underlying type of an enumeration. 4236 UPPC_FixedUnderlyingType, 4237 4238 /// \brief The enumerator value. 4239 UPPC_EnumeratorValue, 4240 4241 /// \brief A using declaration. 4242 UPPC_UsingDeclaration, 4243 4244 /// \brief A friend declaration. 4245 UPPC_FriendDeclaration, 4246 4247 /// \brief A declaration qualifier. 4248 UPPC_DeclarationQualifier, 4249 4250 /// \brief An initializer. 4251 UPPC_Initializer, 4252 4253 /// \brief A default argument. 4254 UPPC_DefaultArgument, 4255 4256 /// \brief The type of a non-type template parameter. 4257 UPPC_NonTypeTemplateParameterType, 4258 4259 /// \brief The type of an exception. 4260 UPPC_ExceptionType, 4261 4262 /// \brief Partial specialization. 4263 UPPC_PartialSpecialization, 4264 4265 /// \brief Microsoft __if_exists. 4266 UPPC_IfExists, 4267 4268 /// \brief Microsoft __if_not_exists. 4269 UPPC_IfNotExists 4270}; 4271 4272 /// \brief Diagnose unexpanded parameter packs. 4273 /// 4274 /// \param Loc The location at which we should emit the diagnostic. 4275 /// 4276 /// \param UPPC The context in which we are diagnosing unexpanded 4277 /// parameter packs. 4278 /// 4279 /// \param Unexpanded the set of unexpanded parameter packs. 4280 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4281 UnexpandedParameterPackContext UPPC, 4282 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4283 4284 /// \brief If the given type contains an unexpanded parameter pack, 4285 /// diagnose the error. 4286 /// 4287 /// \param Loc The source location where a diagnostc should be emitted. 4288 /// 4289 /// \param T The type that is being checked for unexpanded parameter 4290 /// packs. 4291 /// 4292 /// \returns true if an error occurred, false otherwise. 4293 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4294 UnexpandedParameterPackContext UPPC); 4295 4296 /// \brief If the given expression contains an unexpanded parameter 4297 /// pack, diagnose the error. 4298 /// 4299 /// \param E The expression that is being checked for unexpanded 4300 /// parameter packs. 4301 /// 4302 /// \returns true if an error occurred, false otherwise. 4303 bool DiagnoseUnexpandedParameterPack(Expr *E, 4304 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4305 4306 /// \brief If the given nested-name-specifier contains an unexpanded 4307 /// parameter pack, diagnose the error. 4308 /// 4309 /// \param SS The nested-name-specifier that is being checked for 4310 /// unexpanded parameter packs. 4311 /// 4312 /// \returns true if an error occurred, false otherwise. 4313 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4314 UnexpandedParameterPackContext UPPC); 4315 4316 /// \brief If the given name contains an unexpanded parameter pack, 4317 /// diagnose the error. 4318 /// 4319 /// \param NameInfo The name (with source location information) that 4320 /// is being checked for unexpanded parameter packs. 4321 /// 4322 /// \returns true if an error occurred, false otherwise. 4323 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4324 UnexpandedParameterPackContext UPPC); 4325 4326 /// \brief If the given template name contains an unexpanded parameter pack, 4327 /// diagnose the error. 4328 /// 4329 /// \param Loc The location of the template name. 4330 /// 4331 /// \param Template The template name that is being checked for unexpanded 4332 /// parameter packs. 4333 /// 4334 /// \returns true if an error occurred, false otherwise. 4335 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4336 TemplateName Template, 4337 UnexpandedParameterPackContext UPPC); 4338 4339 /// \brief If the given template argument contains an unexpanded parameter 4340 /// pack, diagnose the error. 4341 /// 4342 /// \param Arg The template argument that is being checked for unexpanded 4343 /// parameter packs. 4344 /// 4345 /// \returns true if an error occurred, false otherwise. 4346 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4347 UnexpandedParameterPackContext UPPC); 4348 4349 /// \brief Collect the set of unexpanded parameter packs within the given 4350 /// template argument. 4351 /// 4352 /// \param Arg The template argument that will be traversed to find 4353 /// unexpanded parameter packs. 4354 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4355 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4356 4357 /// \brief Collect the set of unexpanded parameter packs within the given 4358 /// template argument. 4359 /// 4360 /// \param Arg The template argument that will be traversed to find 4361 /// unexpanded parameter packs. 4362 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4363 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4364 4365 /// \brief Collect the set of unexpanded parameter packs within the given 4366 /// type. 4367 /// 4368 /// \param T The type that will be traversed to find 4369 /// unexpanded parameter packs. 4370 void collectUnexpandedParameterPacks(QualType T, 4371 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4372 4373 /// \brief Collect the set of unexpanded parameter packs within the given 4374 /// type. 4375 /// 4376 /// \param TL The type that will be traversed to find 4377 /// unexpanded parameter packs. 4378 void collectUnexpandedParameterPacks(TypeLoc TL, 4379 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4380 4381 /// \brief Collect the set of unexpanded parameter packs within the given 4382 /// nested-name-specifier. 4383 /// 4384 /// \param SS The nested-name-specifier that will be traversed to find 4385 /// unexpanded parameter packs. 4386 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4387 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4388 4389 /// \brief Collect the set of unexpanded parameter packs within the given 4390 /// name. 4391 /// 4392 /// \param NameInfo The name that will be traversed to find 4393 /// unexpanded parameter packs. 4394 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4395 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4396 4397 /// \brief Invoked when parsing a template argument followed by an 4398 /// ellipsis, which creates a pack expansion. 4399 /// 4400 /// \param Arg The template argument preceding the ellipsis, which 4401 /// may already be invalid. 4402 /// 4403 /// \param EllipsisLoc The location of the ellipsis. 4404 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4405 SourceLocation EllipsisLoc); 4406 4407 /// \brief Invoked when parsing a type followed by an ellipsis, which 4408 /// creates a pack expansion. 4409 /// 4410 /// \param Type The type preceding the ellipsis, which will become 4411 /// the pattern of the pack expansion. 4412 /// 4413 /// \param EllipsisLoc The location of the ellipsis. 4414 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4415 4416 /// \brief Construct a pack expansion type from the pattern of the pack 4417 /// expansion. 4418 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4419 SourceLocation EllipsisLoc, 4420 llvm::Optional<unsigned> NumExpansions); 4421 4422 /// \brief Construct a pack expansion type from the pattern of the pack 4423 /// expansion. 4424 QualType CheckPackExpansion(QualType Pattern, 4425 SourceRange PatternRange, 4426 SourceLocation EllipsisLoc, 4427 llvm::Optional<unsigned> NumExpansions); 4428 4429 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4430 /// creates a pack expansion. 4431 /// 4432 /// \param Pattern The expression preceding the ellipsis, which will become 4433 /// the pattern of the pack expansion. 4434 /// 4435 /// \param EllipsisLoc The location of the ellipsis. 4436 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4437 4438 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4439 /// creates a pack expansion. 4440 /// 4441 /// \param Pattern The expression preceding the ellipsis, which will become 4442 /// the pattern of the pack expansion. 4443 /// 4444 /// \param EllipsisLoc The location of the ellipsis. 4445 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4446 llvm::Optional<unsigned> NumExpansions); 4447 4448 /// \brief Determine whether we could expand a pack expansion with the 4449 /// given set of parameter packs into separate arguments by repeatedly 4450 /// transforming the pattern. 4451 /// 4452 /// \param EllipsisLoc The location of the ellipsis that identifies the 4453 /// pack expansion. 4454 /// 4455 /// \param PatternRange The source range that covers the entire pattern of 4456 /// the pack expansion. 4457 /// 4458 /// \param Unexpanded The set of unexpanded parameter packs within the 4459 /// pattern. 4460 /// 4461 /// \param NumUnexpanded The number of unexpanded parameter packs in 4462 /// \p Unexpanded. 4463 /// 4464 /// \param ShouldExpand Will be set to \c true if the transformer should 4465 /// expand the corresponding pack expansions into separate arguments. When 4466 /// set, \c NumExpansions must also be set. 4467 /// 4468 /// \param RetainExpansion Whether the caller should add an unexpanded 4469 /// pack expansion after all of the expanded arguments. This is used 4470 /// when extending explicitly-specified template argument packs per 4471 /// C++0x [temp.arg.explicit]p9. 4472 /// 4473 /// \param NumExpansions The number of separate arguments that will be in 4474 /// the expanded form of the corresponding pack expansion. This is both an 4475 /// input and an output parameter, which can be set by the caller if the 4476 /// number of expansions is known a priori (e.g., due to a prior substitution) 4477 /// and will be set by the callee when the number of expansions is known. 4478 /// The callee must set this value when \c ShouldExpand is \c true; it may 4479 /// set this value in other cases. 4480 /// 4481 /// \returns true if an error occurred (e.g., because the parameter packs 4482 /// are to be instantiated with arguments of different lengths), false 4483 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4484 /// must be set. 4485 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4486 SourceRange PatternRange, 4487 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4488 const MultiLevelTemplateArgumentList &TemplateArgs, 4489 bool &ShouldExpand, 4490 bool &RetainExpansion, 4491 llvm::Optional<unsigned> &NumExpansions); 4492 4493 /// \brief Determine the number of arguments in the given pack expansion 4494 /// type. 4495 /// 4496 /// This routine already assumes that the pack expansion type can be 4497 /// expanded and that the number of arguments in the expansion is 4498 /// consistent across all of the unexpanded parameter packs in its pattern. 4499 unsigned getNumArgumentsInExpansion(QualType T, 4500 const MultiLevelTemplateArgumentList &TemplateArgs); 4501 4502 /// \brief Determine whether the given declarator contains any unexpanded 4503 /// parameter packs. 4504 /// 4505 /// This routine is used by the parser to disambiguate function declarators 4506 /// with an ellipsis prior to the ')', e.g., 4507 /// 4508 /// \code 4509 /// void f(T...); 4510 /// \endcode 4511 /// 4512 /// To determine whether we have an (unnamed) function parameter pack or 4513 /// a variadic function. 4514 /// 4515 /// \returns true if the declarator contains any unexpanded parameter packs, 4516 /// false otherwise. 4517 bool containsUnexpandedParameterPacks(Declarator &D); 4518 4519 //===--------------------------------------------------------------------===// 4520 // C++ Template Argument Deduction (C++ [temp.deduct]) 4521 //===--------------------------------------------------------------------===// 4522 4523 /// \brief Describes the result of template argument deduction. 4524 /// 4525 /// The TemplateDeductionResult enumeration describes the result of 4526 /// template argument deduction, as returned from 4527 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4528 /// structure provides additional information about the results of 4529 /// template argument deduction, e.g., the deduced template argument 4530 /// list (if successful) or the specific template parameters or 4531 /// deduced arguments that were involved in the failure. 4532 enum TemplateDeductionResult { 4533 /// \brief Template argument deduction was successful. 4534 TDK_Success = 0, 4535 /// \brief Template argument deduction exceeded the maximum template 4536 /// instantiation depth (which has already been diagnosed). 4537 TDK_InstantiationDepth, 4538 /// \brief Template argument deduction did not deduce a value 4539 /// for every template parameter. 4540 TDK_Incomplete, 4541 /// \brief Template argument deduction produced inconsistent 4542 /// deduced values for the given template parameter. 4543 TDK_Inconsistent, 4544 /// \brief Template argument deduction failed due to inconsistent 4545 /// cv-qualifiers on a template parameter type that would 4546 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4547 /// but were given a non-const "X". 4548 TDK_Underqualified, 4549 /// \brief Substitution of the deduced template argument values 4550 /// resulted in an error. 4551 TDK_SubstitutionFailure, 4552 /// \brief Substitution of the deduced template argument values 4553 /// into a non-deduced context produced a type or value that 4554 /// produces a type that does not match the original template 4555 /// arguments provided. 4556 TDK_NonDeducedMismatch, 4557 /// \brief When performing template argument deduction for a function 4558 /// template, there were too many call arguments. 4559 TDK_TooManyArguments, 4560 /// \brief When performing template argument deduction for a function 4561 /// template, there were too few call arguments. 4562 TDK_TooFewArguments, 4563 /// \brief The explicitly-specified template arguments were not valid 4564 /// template arguments for the given template. 4565 TDK_InvalidExplicitArguments, 4566 /// \brief The arguments included an overloaded function name that could 4567 /// not be resolved to a suitable function. 4568 TDK_FailedOverloadResolution 4569 }; 4570 4571 TemplateDeductionResult 4572 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4573 const TemplateArgumentList &TemplateArgs, 4574 sema::TemplateDeductionInfo &Info); 4575 4576 TemplateDeductionResult 4577 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4578 TemplateArgumentListInfo &ExplicitTemplateArgs, 4579 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4580 SmallVectorImpl<QualType> &ParamTypes, 4581 QualType *FunctionType, 4582 sema::TemplateDeductionInfo &Info); 4583 4584 /// brief A function argument from which we performed template argument 4585 // deduction for a call. 4586 struct OriginalCallArg { 4587 OriginalCallArg(QualType OriginalParamType, 4588 unsigned ArgIdx, 4589 QualType OriginalArgType) 4590 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4591 OriginalArgType(OriginalArgType) { } 4592 4593 QualType OriginalParamType; 4594 unsigned ArgIdx; 4595 QualType OriginalArgType; 4596 }; 4597 4598 TemplateDeductionResult 4599 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4600 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4601 unsigned NumExplicitlySpecified, 4602 FunctionDecl *&Specialization, 4603 sema::TemplateDeductionInfo &Info, 4604 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4605 4606 TemplateDeductionResult 4607 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4608 TemplateArgumentListInfo *ExplicitTemplateArgs, 4609 Expr **Args, unsigned NumArgs, 4610 FunctionDecl *&Specialization, 4611 sema::TemplateDeductionInfo &Info); 4612 4613 TemplateDeductionResult 4614 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4615 TemplateArgumentListInfo *ExplicitTemplateArgs, 4616 QualType ArgFunctionType, 4617 FunctionDecl *&Specialization, 4618 sema::TemplateDeductionInfo &Info); 4619 4620 TemplateDeductionResult 4621 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4622 QualType ToType, 4623 CXXConversionDecl *&Specialization, 4624 sema::TemplateDeductionInfo &Info); 4625 4626 TemplateDeductionResult 4627 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4628 TemplateArgumentListInfo *ExplicitTemplateArgs, 4629 FunctionDecl *&Specialization, 4630 sema::TemplateDeductionInfo &Info); 4631 4632 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4633 TypeSourceInfo *&Result); 4634 4635 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4636 FunctionTemplateDecl *FT2, 4637 SourceLocation Loc, 4638 TemplatePartialOrderingContext TPOC, 4639 unsigned NumCallArguments); 4640 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4641 UnresolvedSetIterator SEnd, 4642 TemplatePartialOrderingContext TPOC, 4643 unsigned NumCallArguments, 4644 SourceLocation Loc, 4645 const PartialDiagnostic &NoneDiag, 4646 const PartialDiagnostic &AmbigDiag, 4647 const PartialDiagnostic &CandidateDiag, 4648 bool Complain = true, 4649 QualType TargetType = QualType()); 4650 4651 ClassTemplatePartialSpecializationDecl * 4652 getMoreSpecializedPartialSpecialization( 4653 ClassTemplatePartialSpecializationDecl *PS1, 4654 ClassTemplatePartialSpecializationDecl *PS2, 4655 SourceLocation Loc); 4656 4657 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4658 bool OnlyDeduced, 4659 unsigned Depth, 4660 SmallVectorImpl<bool> &Used); 4661 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4662 SmallVectorImpl<bool> &Deduced); 4663 4664 //===--------------------------------------------------------------------===// 4665 // C++ Template Instantiation 4666 // 4667 4668 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4669 const TemplateArgumentList *Innermost = 0, 4670 bool RelativeToPrimary = false, 4671 const FunctionDecl *Pattern = 0); 4672 4673 /// \brief A template instantiation that is currently in progress. 4674 struct ActiveTemplateInstantiation { 4675 /// \brief The kind of template instantiation we are performing 4676 enum InstantiationKind { 4677 /// We are instantiating a template declaration. The entity is 4678 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4679 TemplateInstantiation, 4680 4681 /// We are instantiating a default argument for a template 4682 /// parameter. The Entity is the template, and 4683 /// TemplateArgs/NumTemplateArguments provides the template 4684 /// arguments as specified. 4685 /// FIXME: Use a TemplateArgumentList 4686 DefaultTemplateArgumentInstantiation, 4687 4688 /// We are instantiating a default argument for a function. 4689 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4690 /// provides the template arguments as specified. 4691 DefaultFunctionArgumentInstantiation, 4692 4693 /// We are substituting explicit template arguments provided for 4694 /// a function template. The entity is a FunctionTemplateDecl. 4695 ExplicitTemplateArgumentSubstitution, 4696 4697 /// We are substituting template argument determined as part of 4698 /// template argument deduction for either a class template 4699 /// partial specialization or a function template. The 4700 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4701 /// a FunctionTemplateDecl. 4702 DeducedTemplateArgumentSubstitution, 4703 4704 /// We are substituting prior template arguments into a new 4705 /// template parameter. The template parameter itself is either a 4706 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4707 PriorTemplateArgumentSubstitution, 4708 4709 /// We are checking the validity of a default template argument that 4710 /// has been used when naming a template-id. 4711 DefaultTemplateArgumentChecking 4712 } Kind; 4713 4714 /// \brief The point of instantiation within the source code. 4715 SourceLocation PointOfInstantiation; 4716 4717 /// \brief The template (or partial specialization) in which we are 4718 /// performing the instantiation, for substitutions of prior template 4719 /// arguments. 4720 NamedDecl *Template; 4721 4722 /// \brief The entity that is being instantiated. 4723 uintptr_t Entity; 4724 4725 /// \brief The list of template arguments we are substituting, if they 4726 /// are not part of the entity. 4727 const TemplateArgument *TemplateArgs; 4728 4729 /// \brief The number of template arguments in TemplateArgs. 4730 unsigned NumTemplateArgs; 4731 4732 /// \brief The template deduction info object associated with the 4733 /// substitution or checking of explicit or deduced template arguments. 4734 sema::TemplateDeductionInfo *DeductionInfo; 4735 4736 /// \brief The source range that covers the construct that cause 4737 /// the instantiation, e.g., the template-id that causes a class 4738 /// template instantiation. 4739 SourceRange InstantiationRange; 4740 4741 ActiveTemplateInstantiation() 4742 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4743 NumTemplateArgs(0), DeductionInfo(0) {} 4744 4745 /// \brief Determines whether this template is an actual instantiation 4746 /// that should be counted toward the maximum instantiation depth. 4747 bool isInstantiationRecord() const; 4748 4749 friend bool operator==(const ActiveTemplateInstantiation &X, 4750 const ActiveTemplateInstantiation &Y) { 4751 if (X.Kind != Y.Kind) 4752 return false; 4753 4754 if (X.Entity != Y.Entity) 4755 return false; 4756 4757 switch (X.Kind) { 4758 case TemplateInstantiation: 4759 return true; 4760 4761 case PriorTemplateArgumentSubstitution: 4762 case DefaultTemplateArgumentChecking: 4763 if (X.Template != Y.Template) 4764 return false; 4765 4766 // Fall through 4767 4768 case DefaultTemplateArgumentInstantiation: 4769 case ExplicitTemplateArgumentSubstitution: 4770 case DeducedTemplateArgumentSubstitution: 4771 case DefaultFunctionArgumentInstantiation: 4772 return X.TemplateArgs == Y.TemplateArgs; 4773 4774 } 4775 4776 return true; 4777 } 4778 4779 friend bool operator!=(const ActiveTemplateInstantiation &X, 4780 const ActiveTemplateInstantiation &Y) { 4781 return !(X == Y); 4782 } 4783 }; 4784 4785 /// \brief List of active template instantiations. 4786 /// 4787 /// This vector is treated as a stack. As one template instantiation 4788 /// requires another template instantiation, additional 4789 /// instantiations are pushed onto the stack up to a 4790 /// user-configurable limit LangOptions::InstantiationDepth. 4791 SmallVector<ActiveTemplateInstantiation, 16> 4792 ActiveTemplateInstantiations; 4793 4794 /// \brief Whether we are in a SFINAE context that is not associated with 4795 /// template instantiation. 4796 /// 4797 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4798 /// of a template instantiation or template argument deduction. 4799 bool InNonInstantiationSFINAEContext; 4800 4801 /// \brief The number of ActiveTemplateInstantiation entries in 4802 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4803 /// therefore, should not be counted as part of the instantiation depth. 4804 unsigned NonInstantiationEntries; 4805 4806 /// \brief The last template from which a template instantiation 4807 /// error or warning was produced. 4808 /// 4809 /// This value is used to suppress printing of redundant template 4810 /// instantiation backtraces when there are multiple errors in the 4811 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4812 /// to implement it anywhere else. 4813 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4814 4815 /// \brief The current index into pack expansion arguments that will be 4816 /// used for substitution of parameter packs. 4817 /// 4818 /// The pack expansion index will be -1 to indicate that parameter packs 4819 /// should be instantiated as themselves. Otherwise, the index specifies 4820 /// which argument within the parameter pack will be used for substitution. 4821 int ArgumentPackSubstitutionIndex; 4822 4823 /// \brief RAII object used to change the argument pack substitution index 4824 /// within a \c Sema object. 4825 /// 4826 /// See \c ArgumentPackSubstitutionIndex for more information. 4827 class ArgumentPackSubstitutionIndexRAII { 4828 Sema &Self; 4829 int OldSubstitutionIndex; 4830 4831 public: 4832 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4833 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4834 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4835 } 4836 4837 ~ArgumentPackSubstitutionIndexRAII() { 4838 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4839 } 4840 }; 4841 4842 friend class ArgumentPackSubstitutionRAII; 4843 4844 /// \brief The stack of calls expression undergoing template instantiation. 4845 /// 4846 /// The top of this stack is used by a fixit instantiating unresolved 4847 /// function calls to fix the AST to match the textual change it prints. 4848 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4849 4850 /// \brief For each declaration that involved template argument deduction, the 4851 /// set of diagnostics that were suppressed during that template argument 4852 /// deduction. 4853 /// 4854 /// FIXME: Serialize this structure to the AST file. 4855 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4856 SuppressedDiagnostics; 4857 4858 /// \brief A stack object to be created when performing template 4859 /// instantiation. 4860 /// 4861 /// Construction of an object of type \c InstantiatingTemplate 4862 /// pushes the current instantiation onto the stack of active 4863 /// instantiations. If the size of this stack exceeds the maximum 4864 /// number of recursive template instantiations, construction 4865 /// produces an error and evaluates true. 4866 /// 4867 /// Destruction of this object will pop the named instantiation off 4868 /// the stack. 4869 struct InstantiatingTemplate { 4870 /// \brief Note that we are instantiating a class template, 4871 /// function template, or a member thereof. 4872 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4873 Decl *Entity, 4874 SourceRange InstantiationRange = SourceRange()); 4875 4876 /// \brief Note that we are instantiating a default argument in a 4877 /// template-id. 4878 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4879 TemplateDecl *Template, 4880 const TemplateArgument *TemplateArgs, 4881 unsigned NumTemplateArgs, 4882 SourceRange InstantiationRange = SourceRange()); 4883 4884 /// \brief Note that we are instantiating a default argument in a 4885 /// template-id. 4886 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4887 FunctionTemplateDecl *FunctionTemplate, 4888 const TemplateArgument *TemplateArgs, 4889 unsigned NumTemplateArgs, 4890 ActiveTemplateInstantiation::InstantiationKind Kind, 4891 sema::TemplateDeductionInfo &DeductionInfo, 4892 SourceRange InstantiationRange = SourceRange()); 4893 4894 /// \brief Note that we are instantiating as part of template 4895 /// argument deduction for a class template partial 4896 /// specialization. 4897 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4898 ClassTemplatePartialSpecializationDecl *PartialSpec, 4899 const TemplateArgument *TemplateArgs, 4900 unsigned NumTemplateArgs, 4901 sema::TemplateDeductionInfo &DeductionInfo, 4902 SourceRange InstantiationRange = SourceRange()); 4903 4904 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4905 ParmVarDecl *Param, 4906 const TemplateArgument *TemplateArgs, 4907 unsigned NumTemplateArgs, 4908 SourceRange InstantiationRange = SourceRange()); 4909 4910 /// \brief Note that we are substituting prior template arguments into a 4911 /// non-type or template template parameter. 4912 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4913 NamedDecl *Template, 4914 NonTypeTemplateParmDecl *Param, 4915 const TemplateArgument *TemplateArgs, 4916 unsigned NumTemplateArgs, 4917 SourceRange InstantiationRange); 4918 4919 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4920 NamedDecl *Template, 4921 TemplateTemplateParmDecl *Param, 4922 const TemplateArgument *TemplateArgs, 4923 unsigned NumTemplateArgs, 4924 SourceRange InstantiationRange); 4925 4926 /// \brief Note that we are checking the default template argument 4927 /// against the template parameter for a given template-id. 4928 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4929 TemplateDecl *Template, 4930 NamedDecl *Param, 4931 const TemplateArgument *TemplateArgs, 4932 unsigned NumTemplateArgs, 4933 SourceRange InstantiationRange); 4934 4935 4936 /// \brief Note that we have finished instantiating this template. 4937 void Clear(); 4938 4939 ~InstantiatingTemplate() { Clear(); } 4940 4941 /// \brief Determines whether we have exceeded the maximum 4942 /// recursive template instantiations. 4943 operator bool() const { return Invalid; } 4944 4945 private: 4946 Sema &SemaRef; 4947 bool Invalid; 4948 bool SavedInNonInstantiationSFINAEContext; 4949 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4950 SourceRange InstantiationRange); 4951 4952 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4953 4954 InstantiatingTemplate& 4955 operator=(const InstantiatingTemplate&); // not implemented 4956 }; 4957 4958 void PrintInstantiationStack(); 4959 4960 /// \brief Determines whether we are currently in a context where 4961 /// template argument substitution failures are not considered 4962 /// errors. 4963 /// 4964 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4965 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4966 /// template-deduction context object, which can be used to capture 4967 /// diagnostics that will be suppressed. 4968 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4969 4970 /// \brief RAII class used to determine whether SFINAE has 4971 /// trapped any errors that occur during template argument 4972 /// deduction.` 4973 class SFINAETrap { 4974 Sema &SemaRef; 4975 unsigned PrevSFINAEErrors; 4976 bool PrevInNonInstantiationSFINAEContext; 4977 bool PrevAccessCheckingSFINAE; 4978 4979 public: 4980 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4981 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4982 PrevInNonInstantiationSFINAEContext( 4983 SemaRef.InNonInstantiationSFINAEContext), 4984 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4985 { 4986 if (!SemaRef.isSFINAEContext()) 4987 SemaRef.InNonInstantiationSFINAEContext = true; 4988 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4989 } 4990 4991 ~SFINAETrap() { 4992 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4993 SemaRef.InNonInstantiationSFINAEContext 4994 = PrevInNonInstantiationSFINAEContext; 4995 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4996 } 4997 4998 /// \brief Determine whether any SFINAE errors have been trapped. 4999 bool hasErrorOccurred() const { 5000 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5001 } 5002 }; 5003 5004 /// \brief The current instantiation scope used to store local 5005 /// variables. 5006 LocalInstantiationScope *CurrentInstantiationScope; 5007 5008 /// \brief The number of typos corrected by CorrectTypo. 5009 unsigned TyposCorrected; 5010 5011 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5012 UnqualifiedTyposCorrectedMap; 5013 5014 /// \brief A cache containing the results of typo correction for unqualified 5015 /// name lookup. 5016 /// 5017 /// The string is the string that we corrected to (which may be empty, if 5018 /// there was no correction), while the boolean will be true when the 5019 /// string represents a keyword. 5020 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5021 5022 /// \brief Worker object for performing CFG-based warnings. 5023 sema::AnalysisBasedWarnings AnalysisWarnings; 5024 5025 /// \brief An entity for which implicit template instantiation is required. 5026 /// 5027 /// The source location associated with the declaration is the first place in 5028 /// the source code where the declaration was "used". It is not necessarily 5029 /// the point of instantiation (which will be either before or after the 5030 /// namespace-scope declaration that triggered this implicit instantiation), 5031 /// However, it is the location that diagnostics should generally refer to, 5032 /// because users will need to know what code triggered the instantiation. 5033 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5034 5035 /// \brief The queue of implicit template instantiations that are required 5036 /// but have not yet been performed. 5037 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5038 5039 /// \brief The queue of implicit template instantiations that are required 5040 /// and must be performed within the current local scope. 5041 /// 5042 /// This queue is only used for member functions of local classes in 5043 /// templates, which must be instantiated in the same scope as their 5044 /// enclosing function, so that they can reference function-local 5045 /// types, static variables, enumerators, etc. 5046 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5047 5048 void PerformPendingInstantiations(bool LocalOnly = false); 5049 5050 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5051 const MultiLevelTemplateArgumentList &TemplateArgs, 5052 SourceLocation Loc, DeclarationName Entity); 5053 5054 QualType SubstType(QualType T, 5055 const MultiLevelTemplateArgumentList &TemplateArgs, 5056 SourceLocation Loc, DeclarationName Entity); 5057 5058 TypeSourceInfo *SubstType(TypeLoc TL, 5059 const MultiLevelTemplateArgumentList &TemplateArgs, 5060 SourceLocation Loc, DeclarationName Entity); 5061 5062 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5063 const MultiLevelTemplateArgumentList &TemplateArgs, 5064 SourceLocation Loc, 5065 DeclarationName Entity); 5066 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5067 const MultiLevelTemplateArgumentList &TemplateArgs, 5068 int indexAdjustment, 5069 llvm::Optional<unsigned> NumExpansions); 5070 bool SubstParmTypes(SourceLocation Loc, 5071 ParmVarDecl **Params, unsigned NumParams, 5072 const MultiLevelTemplateArgumentList &TemplateArgs, 5073 SmallVectorImpl<QualType> &ParamTypes, 5074 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5075 ExprResult SubstExpr(Expr *E, 5076 const MultiLevelTemplateArgumentList &TemplateArgs); 5077 5078 /// \brief Substitute the given template arguments into a list of 5079 /// expressions, expanding pack expansions if required. 5080 /// 5081 /// \param Exprs The list of expressions to substitute into. 5082 /// 5083 /// \param NumExprs The number of expressions in \p Exprs. 5084 /// 5085 /// \param IsCall Whether this is some form of call, in which case 5086 /// default arguments will be dropped. 5087 /// 5088 /// \param TemplateArgs The set of template arguments to substitute. 5089 /// 5090 /// \param Outputs Will receive all of the substituted arguments. 5091 /// 5092 /// \returns true if an error occurred, false otherwise. 5093 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5094 const MultiLevelTemplateArgumentList &TemplateArgs, 5095 SmallVectorImpl<Expr *> &Outputs); 5096 5097 StmtResult SubstStmt(Stmt *S, 5098 const MultiLevelTemplateArgumentList &TemplateArgs); 5099 5100 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5101 const MultiLevelTemplateArgumentList &TemplateArgs); 5102 5103 bool 5104 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5105 CXXRecordDecl *Pattern, 5106 const MultiLevelTemplateArgumentList &TemplateArgs); 5107 5108 bool 5109 InstantiateClass(SourceLocation PointOfInstantiation, 5110 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5111 const MultiLevelTemplateArgumentList &TemplateArgs, 5112 TemplateSpecializationKind TSK, 5113 bool Complain = true); 5114 5115 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5116 const Decl *Pattern, Decl *Inst); 5117 5118 bool 5119 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5120 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5121 TemplateSpecializationKind TSK, 5122 bool Complain = true); 5123 5124 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5125 CXXRecordDecl *Instantiation, 5126 const MultiLevelTemplateArgumentList &TemplateArgs, 5127 TemplateSpecializationKind TSK); 5128 5129 void InstantiateClassTemplateSpecializationMembers( 5130 SourceLocation PointOfInstantiation, 5131 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5132 TemplateSpecializationKind TSK); 5133 5134 NestedNameSpecifierLoc 5135 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5136 const MultiLevelTemplateArgumentList &TemplateArgs); 5137 5138 DeclarationNameInfo 5139 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5140 const MultiLevelTemplateArgumentList &TemplateArgs); 5141 TemplateName 5142 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5143 SourceLocation Loc, 5144 const MultiLevelTemplateArgumentList &TemplateArgs); 5145 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5146 TemplateArgumentListInfo &Result, 5147 const MultiLevelTemplateArgumentList &TemplateArgs); 5148 5149 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5150 FunctionDecl *Function, 5151 bool Recursive = false, 5152 bool DefinitionRequired = false); 5153 void InstantiateStaticDataMemberDefinition( 5154 SourceLocation PointOfInstantiation, 5155 VarDecl *Var, 5156 bool Recursive = false, 5157 bool DefinitionRequired = false); 5158 5159 void InstantiateMemInitializers(CXXConstructorDecl *New, 5160 const CXXConstructorDecl *Tmpl, 5161 const MultiLevelTemplateArgumentList &TemplateArgs); 5162 bool InstantiateInitializer(Expr *Init, 5163 const MultiLevelTemplateArgumentList &TemplateArgs, 5164 SourceLocation &LParenLoc, 5165 ASTOwningVector<Expr*> &NewArgs, 5166 SourceLocation &RParenLoc); 5167 5168 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5169 const MultiLevelTemplateArgumentList &TemplateArgs); 5170 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5171 const MultiLevelTemplateArgumentList &TemplateArgs); 5172 5173 // Objective-C declarations. 5174 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5175 IdentifierInfo *ClassName, 5176 SourceLocation ClassLoc, 5177 IdentifierInfo *SuperName, 5178 SourceLocation SuperLoc, 5179 Decl * const *ProtoRefs, 5180 unsigned NumProtoRefs, 5181 const SourceLocation *ProtoLocs, 5182 SourceLocation EndProtoLoc, 5183 AttributeList *AttrList); 5184 5185 Decl *ActOnCompatiblityAlias( 5186 SourceLocation AtCompatibilityAliasLoc, 5187 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5188 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5189 5190 bool CheckForwardProtocolDeclarationForCircularDependency( 5191 IdentifierInfo *PName, 5192 SourceLocation &PLoc, SourceLocation PrevLoc, 5193 const ObjCList<ObjCProtocolDecl> &PList); 5194 5195 Decl *ActOnStartProtocolInterface( 5196 SourceLocation AtProtoInterfaceLoc, 5197 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5198 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5199 const SourceLocation *ProtoLocs, 5200 SourceLocation EndProtoLoc, 5201 AttributeList *AttrList); 5202 5203 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5204 IdentifierInfo *ClassName, 5205 SourceLocation ClassLoc, 5206 IdentifierInfo *CategoryName, 5207 SourceLocation CategoryLoc, 5208 Decl * const *ProtoRefs, 5209 unsigned NumProtoRefs, 5210 const SourceLocation *ProtoLocs, 5211 SourceLocation EndProtoLoc); 5212 5213 Decl *ActOnStartClassImplementation( 5214 SourceLocation AtClassImplLoc, 5215 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5216 IdentifierInfo *SuperClassname, 5217 SourceLocation SuperClassLoc); 5218 5219 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5220 IdentifierInfo *ClassName, 5221 SourceLocation ClassLoc, 5222 IdentifierInfo *CatName, 5223 SourceLocation CatLoc); 5224 5225 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5226 IdentifierInfo **IdentList, 5227 SourceLocation *IdentLocs, 5228 unsigned NumElts); 5229 5230 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5231 const IdentifierLocPair *IdentList, 5232 unsigned NumElts, 5233 AttributeList *attrList); 5234 5235 void FindProtocolDeclaration(bool WarnOnDeclarations, 5236 const IdentifierLocPair *ProtocolId, 5237 unsigned NumProtocols, 5238 SmallVectorImpl<Decl *> &Protocols); 5239 5240 /// Ensure attributes are consistent with type. 5241 /// \param [in, out] Attributes The attributes to check; they will 5242 /// be modified to be consistent with \arg PropertyTy. 5243 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5244 SourceLocation Loc, 5245 unsigned &Attributes); 5246 5247 /// Process the specified property declaration and create decls for the 5248 /// setters and getters as needed. 5249 /// \param property The property declaration being processed 5250 /// \param DC The semantic container for the property 5251 /// \param redeclaredProperty Declaration for property if redeclared 5252 /// in class extension. 5253 /// \param lexicalDC Container for redeclaredProperty. 5254 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5255 ObjCContainerDecl *DC, 5256 ObjCPropertyDecl *redeclaredProperty = 0, 5257 ObjCContainerDecl *lexicalDC = 0); 5258 5259 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5260 ObjCPropertyDecl *SuperProperty, 5261 const IdentifierInfo *Name); 5262 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5263 5264 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5265 ObjCMethodDecl *MethodDecl, 5266 bool IsInstance); 5267 5268 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5269 5270 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5271 ObjCInterfaceDecl *ID); 5272 5273 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5274 ObjCProtocolDecl *PDecl); 5275 5276 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5277 Decl **allMethods = 0, unsigned allNum = 0, 5278 Decl **allProperties = 0, unsigned pNum = 0, 5279 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5280 5281 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5282 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5283 Selector GetterSel, Selector SetterSel, 5284 bool *OverridingProperty, 5285 tok::ObjCKeywordKind MethodImplKind, 5286 DeclContext *lexicalDC = 0); 5287 5288 Decl *ActOnPropertyImplDecl(Scope *S, 5289 SourceLocation AtLoc, 5290 SourceLocation PropertyLoc, 5291 bool ImplKind, 5292 IdentifierInfo *PropertyId, 5293 IdentifierInfo *PropertyIvar, 5294 SourceLocation PropertyIvarLoc); 5295 5296 enum ObjCSpecialMethodKind { 5297 OSMK_None, 5298 OSMK_Alloc, 5299 OSMK_New, 5300 OSMK_Copy, 5301 OSMK_RetainingInit, 5302 OSMK_NonRetainingInit 5303 }; 5304 5305 struct ObjCArgInfo { 5306 IdentifierInfo *Name; 5307 SourceLocation NameLoc; 5308 // The Type is null if no type was specified, and the DeclSpec is invalid 5309 // in this case. 5310 ParsedType Type; 5311 ObjCDeclSpec DeclSpec; 5312 5313 /// ArgAttrs - Attribute list for this argument. 5314 AttributeList *ArgAttrs; 5315 }; 5316 5317 Decl *ActOnMethodDeclaration( 5318 Scope *S, 5319 SourceLocation BeginLoc, // location of the + or -. 5320 SourceLocation EndLoc, // location of the ; or {. 5321 tok::TokenKind MethodType, 5322 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5323 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5324 // optional arguments. The number of types/arguments is obtained 5325 // from the Sel.getNumArgs(). 5326 ObjCArgInfo *ArgInfo, 5327 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5328 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5329 bool isVariadic, bool MethodDefinition); 5330 5331 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5332 // Will search "local" class/category implementations for a method decl. 5333 // Will also search in class's root looking for instance method. 5334 // Returns 0 if no method is found. 5335 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5336 ObjCInterfaceDecl *CDecl); 5337 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5338 ObjCInterfaceDecl *ClassDecl); 5339 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5340 const ObjCObjectPointerType *OPT, 5341 bool IsInstance); 5342 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5343 bool IsInstance); 5344 5345 bool inferObjCARCLifetime(ValueDecl *decl); 5346 5347 ExprResult 5348 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5349 Expr *BaseExpr, 5350 SourceLocation OpLoc, 5351 DeclarationName MemberName, 5352 SourceLocation MemberLoc, 5353 SourceLocation SuperLoc, QualType SuperType, 5354 bool Super); 5355 5356 ExprResult 5357 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5358 IdentifierInfo &propertyName, 5359 SourceLocation receiverNameLoc, 5360 SourceLocation propertyNameLoc); 5361 5362 ObjCMethodDecl *tryCaptureObjCSelf(); 5363 5364 /// \brief Describes the kind of message expression indicated by a message 5365 /// send that starts with an identifier. 5366 enum ObjCMessageKind { 5367 /// \brief The message is sent to 'super'. 5368 ObjCSuperMessage, 5369 /// \brief The message is an instance message. 5370 ObjCInstanceMessage, 5371 /// \brief The message is a class message, and the identifier is a type 5372 /// name. 5373 ObjCClassMessage 5374 }; 5375 5376 ObjCMessageKind getObjCMessageKind(Scope *S, 5377 IdentifierInfo *Name, 5378 SourceLocation NameLoc, 5379 bool IsSuper, 5380 bool HasTrailingDot, 5381 ParsedType &ReceiverType); 5382 5383 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5384 Selector Sel, 5385 SourceLocation LBracLoc, 5386 ArrayRef<SourceLocation> SelectorLocs, 5387 SourceLocation RBracLoc, 5388 MultiExprArg Args); 5389 5390 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5391 QualType ReceiverType, 5392 SourceLocation SuperLoc, 5393 Selector Sel, 5394 ObjCMethodDecl *Method, 5395 SourceLocation LBracLoc, 5396 ArrayRef<SourceLocation> SelectorLocs, 5397 SourceLocation RBracLoc, 5398 MultiExprArg Args); 5399 5400 ExprResult ActOnClassMessage(Scope *S, 5401 ParsedType Receiver, 5402 Selector Sel, 5403 SourceLocation LBracLoc, 5404 ArrayRef<SourceLocation> SelectorLocs, 5405 SourceLocation RBracLoc, 5406 MultiExprArg Args); 5407 5408 ExprResult BuildInstanceMessage(Expr *Receiver, 5409 QualType ReceiverType, 5410 SourceLocation SuperLoc, 5411 Selector Sel, 5412 ObjCMethodDecl *Method, 5413 SourceLocation LBracLoc, 5414 ArrayRef<SourceLocation> SelectorLocs, 5415 SourceLocation RBracLoc, 5416 MultiExprArg Args); 5417 5418 ExprResult ActOnInstanceMessage(Scope *S, 5419 Expr *Receiver, 5420 Selector Sel, 5421 SourceLocation LBracLoc, 5422 ArrayRef<SourceLocation> SelectorLocs, 5423 SourceLocation RBracLoc, 5424 MultiExprArg Args); 5425 5426 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5427 ObjCBridgeCastKind Kind, 5428 SourceLocation BridgeKeywordLoc, 5429 TypeSourceInfo *TSInfo, 5430 Expr *SubExpr); 5431 5432 ExprResult ActOnObjCBridgedCast(Scope *S, 5433 SourceLocation LParenLoc, 5434 ObjCBridgeCastKind Kind, 5435 SourceLocation BridgeKeywordLoc, 5436 ParsedType Type, 5437 SourceLocation RParenLoc, 5438 Expr *SubExpr); 5439 5440 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5441 5442 /// \brief Check whether the given new method is a valid override of the 5443 /// given overridden method, and set any properties that should be inherited. 5444 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5445 const ObjCMethodDecl *Overridden, 5446 bool IsImplementation); 5447 5448 /// \brief Check whether the given method overrides any methods in its class, 5449 /// calling \c CheckObjCMethodOverride for each overridden method. 5450 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5451 5452 enum PragmaOptionsAlignKind { 5453 POAK_Native, // #pragma options align=native 5454 POAK_Natural, // #pragma options align=natural 5455 POAK_Packed, // #pragma options align=packed 5456 POAK_Power, // #pragma options align=power 5457 POAK_Mac68k, // #pragma options align=mac68k 5458 POAK_Reset // #pragma options align=reset 5459 }; 5460 5461 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5462 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5463 SourceLocation PragmaLoc, 5464 SourceLocation KindLoc); 5465 5466 enum PragmaPackKind { 5467 PPK_Default, // #pragma pack([n]) 5468 PPK_Show, // #pragma pack(show), only supported by MSVC. 5469 PPK_Push, // #pragma pack(push, [identifier], [n]) 5470 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5471 }; 5472 5473 enum PragmaMSStructKind { 5474 PMSST_OFF, // #pragms ms_struct off 5475 PMSST_ON // #pragms ms_struct on 5476 }; 5477 5478 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5479 void ActOnPragmaPack(PragmaPackKind Kind, 5480 IdentifierInfo *Name, 5481 Expr *Alignment, 5482 SourceLocation PragmaLoc, 5483 SourceLocation LParenLoc, 5484 SourceLocation RParenLoc); 5485 5486 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5487 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5488 5489 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5490 void ActOnPragmaUnused(const Token &Identifier, 5491 Scope *curScope, 5492 SourceLocation PragmaLoc); 5493 5494 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5495 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5496 SourceLocation PragmaLoc); 5497 5498 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5499 SourceLocation Loc); 5500 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5501 5502 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5503 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5504 SourceLocation PragmaLoc, 5505 SourceLocation WeakNameLoc); 5506 5507 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5508 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5509 IdentifierInfo* AliasName, 5510 SourceLocation PragmaLoc, 5511 SourceLocation WeakNameLoc, 5512 SourceLocation AliasNameLoc); 5513 5514 /// ActOnPragmaFPContract - Called on well formed 5515 /// #pragma {STDC,OPENCL} FP_CONTRACT 5516 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5517 5518 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5519 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5520 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5521 5522 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5523 void AddMsStructLayoutForRecord(RecordDecl *RD); 5524 5525 /// FreePackedContext - Deallocate and null out PackContext. 5526 void FreePackedContext(); 5527 5528 /// PushNamespaceVisibilityAttr - Note that we've entered a 5529 /// namespace with a visibility attribute. 5530 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5531 5532 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5533 /// add an appropriate visibility attribute. 5534 void AddPushedVisibilityAttribute(Decl *RD); 5535 5536 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5537 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5538 void PopPragmaVisibility(); 5539 5540 /// FreeVisContext - Deallocate and null out VisContext. 5541 void FreeVisContext(); 5542 5543 /// AddCFAuditedAttribute - Check whether we're currently within 5544 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5545 /// the appropriate attribute. 5546 void AddCFAuditedAttribute(Decl *D); 5547 5548 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5549 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5550 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5551 5552 /// \brief The kind of conversion being performed. 5553 enum CheckedConversionKind { 5554 /// \brief An implicit conversion. 5555 CCK_ImplicitConversion, 5556 /// \brief A C-style cast. 5557 CCK_CStyleCast, 5558 /// \brief A functional-style cast. 5559 CCK_FunctionalCast, 5560 /// \brief A cast other than a C-style cast. 5561 CCK_OtherCast 5562 }; 5563 5564 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5565 /// cast. If there is already an implicit cast, merge into the existing one. 5566 /// If isLvalue, the result of the cast is an lvalue. 5567 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5568 ExprValueKind VK = VK_RValue, 5569 const CXXCastPath *BasePath = 0, 5570 CheckedConversionKind CCK 5571 = CCK_ImplicitConversion); 5572 5573 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5574 /// to the conversion from scalar type ScalarTy to the Boolean type. 5575 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5576 5577 /// IgnoredValueConversions - Given that an expression's result is 5578 /// syntactically ignored, perform any conversions that are 5579 /// required. 5580 ExprResult IgnoredValueConversions(Expr *E); 5581 5582 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5583 // functions and arrays to their respective pointers (C99 6.3.2.1). 5584 ExprResult UsualUnaryConversions(Expr *E); 5585 5586 // DefaultFunctionArrayConversion - converts functions and arrays 5587 // to their respective pointers (C99 6.3.2.1). 5588 ExprResult DefaultFunctionArrayConversion(Expr *E); 5589 5590 // DefaultFunctionArrayLvalueConversion - converts functions and 5591 // arrays to their respective pointers and performs the 5592 // lvalue-to-rvalue conversion. 5593 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5594 5595 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5596 // the operand. This is DefaultFunctionArrayLvalueConversion, 5597 // except that it assumes the operand isn't of function or array 5598 // type. 5599 ExprResult DefaultLvalueConversion(Expr *E); 5600 5601 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5602 // do not have a prototype. Integer promotions are performed on each 5603 // argument, and arguments that have type float are promoted to double. 5604 ExprResult DefaultArgumentPromotion(Expr *E); 5605 5606 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5607 enum VariadicCallType { 5608 VariadicFunction, 5609 VariadicBlock, 5610 VariadicMethod, 5611 VariadicConstructor, 5612 VariadicDoesNotApply 5613 }; 5614 5615 /// GatherArgumentsForCall - Collector argument expressions for various 5616 /// form of call prototypes. 5617 bool GatherArgumentsForCall(SourceLocation CallLoc, 5618 FunctionDecl *FDecl, 5619 const FunctionProtoType *Proto, 5620 unsigned FirstProtoArg, 5621 Expr **Args, unsigned NumArgs, 5622 SmallVector<Expr *, 8> &AllArgs, 5623 VariadicCallType CallType = VariadicDoesNotApply); 5624 5625 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5626 // will warn if the resulting type is not a POD type. 5627 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5628 FunctionDecl *FDecl); 5629 5630 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5631 // operands and then handles various conversions that are common to binary 5632 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5633 // routine returns the first non-arithmetic type found. The client is 5634 // responsible for emitting appropriate error diagnostics. 5635 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5636 bool IsCompAssign = false); 5637 5638 /// AssignConvertType - All of the 'assignment' semantic checks return this 5639 /// enum to indicate whether the assignment was allowed. These checks are 5640 /// done for simple assignments, as well as initialization, return from 5641 /// function, argument passing, etc. The query is phrased in terms of a 5642 /// source and destination type. 5643 enum AssignConvertType { 5644 /// Compatible - the types are compatible according to the standard. 5645 Compatible, 5646 5647 /// PointerToInt - The assignment converts a pointer to an int, which we 5648 /// accept as an extension. 5649 PointerToInt, 5650 5651 /// IntToPointer - The assignment converts an int to a pointer, which we 5652 /// accept as an extension. 5653 IntToPointer, 5654 5655 /// FunctionVoidPointer - The assignment is between a function pointer and 5656 /// void*, which the standard doesn't allow, but we accept as an extension. 5657 FunctionVoidPointer, 5658 5659 /// IncompatiblePointer - The assignment is between two pointers types that 5660 /// are not compatible, but we accept them as an extension. 5661 IncompatiblePointer, 5662 5663 /// IncompatiblePointer - The assignment is between two pointers types which 5664 /// point to integers which have a different sign, but are otherwise 5665 /// identical. This is a subset of the above, but broken out because it's by 5666 /// far the most common case of incompatible pointers. 5667 IncompatiblePointerSign, 5668 5669 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5670 /// c/v/r qualifiers, which we accept as an extension. 5671 CompatiblePointerDiscardsQualifiers, 5672 5673 /// IncompatiblePointerDiscardsQualifiers - The assignment 5674 /// discards qualifiers that we don't permit to be discarded, 5675 /// like address spaces. 5676 IncompatiblePointerDiscardsQualifiers, 5677 5678 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5679 /// nested pointer types, and the qualifiers other than the first two 5680 /// levels differ e.g. char ** -> const char **, but we accept them as an 5681 /// extension. 5682 IncompatibleNestedPointerQualifiers, 5683 5684 /// IncompatibleVectors - The assignment is between two vector types that 5685 /// have the same size, which we accept as an extension. 5686 IncompatibleVectors, 5687 5688 /// IntToBlockPointer - The assignment converts an int to a block 5689 /// pointer. We disallow this. 5690 IntToBlockPointer, 5691 5692 /// IncompatibleBlockPointer - The assignment is between two block 5693 /// pointers types that are not compatible. 5694 IncompatibleBlockPointer, 5695 5696 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5697 /// id type and something else (that is incompatible with it). For example, 5698 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5699 IncompatibleObjCQualifiedId, 5700 5701 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5702 /// object with __weak qualifier. 5703 IncompatibleObjCWeakRef, 5704 5705 /// Incompatible - We reject this conversion outright, it is invalid to 5706 /// represent it in the AST. 5707 Incompatible 5708 }; 5709 5710 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5711 /// assignment conversion type specified by ConvTy. This returns true if the 5712 /// conversion was invalid or false if the conversion was accepted. 5713 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5714 SourceLocation Loc, 5715 QualType DstType, QualType SrcType, 5716 Expr *SrcExpr, AssignmentAction Action, 5717 bool *Complained = 0); 5718 5719 /// CheckAssignmentConstraints - Perform type checking for assignment, 5720 /// argument passing, variable initialization, and function return values. 5721 /// C99 6.5.16. 5722 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5723 QualType LHSType, 5724 QualType RHSType); 5725 5726 /// Check assignment constraints and prepare for a conversion of the 5727 /// RHS to the LHS type. 5728 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5729 ExprResult &RHS, 5730 CastKind &Kind); 5731 5732 // CheckSingleAssignmentConstraints - Currently used by 5733 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5734 // this routine performs the default function/array converions. 5735 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5736 ExprResult &RHS, 5737 bool Diagnose = true); 5738 5739 // \brief If the lhs type is a transparent union, check whether we 5740 // can initialize the transparent union with the given expression. 5741 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5742 ExprResult &RHS); 5743 5744 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5745 5746 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5747 5748 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5749 AssignmentAction Action, 5750 bool AllowExplicit = false); 5751 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5752 AssignmentAction Action, 5753 bool AllowExplicit, 5754 ImplicitConversionSequence& ICS); 5755 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5756 const ImplicitConversionSequence& ICS, 5757 AssignmentAction Action, 5758 CheckedConversionKind CCK 5759 = CCK_ImplicitConversion); 5760 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5761 const StandardConversionSequence& SCS, 5762 AssignmentAction Action, 5763 CheckedConversionKind CCK); 5764 5765 /// the following "Check" methods will return a valid/converted QualType 5766 /// or a null QualType (indicating an error diagnostic was issued). 5767 5768 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5769 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5770 ExprResult &RHS); 5771 QualType CheckPointerToMemberOperands( // C++ 5.5 5772 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5773 SourceLocation OpLoc, bool isIndirect); 5774 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5775 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5776 bool IsDivide); 5777 QualType CheckRemainderOperands( // C99 6.5.5 5778 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5779 bool IsCompAssign = false); 5780 QualType CheckAdditionOperands( // C99 6.5.6 5781 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5782 QualType* CompLHSTy = 0); 5783 QualType CheckSubtractionOperands( // C99 6.5.6 5784 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5785 QualType* CompLHSTy = 0); 5786 QualType CheckShiftOperands( // C99 6.5.7 5787 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5788 bool IsCompAssign = false); 5789 QualType CheckCompareOperands( // C99 6.5.8/9 5790 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5791 bool isRelational); 5792 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5793 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5794 bool IsCompAssign = false); 5795 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5796 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5797 // CheckAssignmentOperands is used for both simple and compound assignment. 5798 // For simple assignment, pass both expressions and a null converted type. 5799 // For compound assignment, pass both expressions and the converted type. 5800 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5801 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5802 5803 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5804 UnaryOperatorKind Opcode, Expr *Op); 5805 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5806 BinaryOperatorKind Opcode, 5807 Expr *LHS, Expr *RHS); 5808 ExprResult checkPseudoObjectRValue(Expr *E); 5809 5810 QualType CheckConditionalOperands( // C99 6.5.15 5811 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5812 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5813 QualType CXXCheckConditionalOperands( // C++ 5.16 5814 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5815 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5816 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5817 bool *NonStandardCompositeType = 0); 5818 QualType FindCompositePointerType(SourceLocation Loc, 5819 ExprResult &E1, ExprResult &E2, 5820 bool *NonStandardCompositeType = 0) { 5821 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5822 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5823 NonStandardCompositeType); 5824 E1 = Owned(E1Tmp); 5825 E2 = Owned(E2Tmp); 5826 return Composite; 5827 } 5828 5829 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5830 SourceLocation QuestionLoc); 5831 5832 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5833 SourceLocation QuestionLoc); 5834 5835 /// type checking for vector binary operators. 5836 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5837 SourceLocation Loc, bool IsCompAssign); 5838 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5839 SourceLocation Loc, bool isRelational); 5840 5841 /// type checking declaration initializers (C99 6.7.8) 5842 bool CheckForConstantInitializer(Expr *e, QualType t); 5843 5844 // type checking C++ declaration initializers (C++ [dcl.init]). 5845 5846 /// ReferenceCompareResult - Expresses the result of comparing two 5847 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5848 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5849 enum ReferenceCompareResult { 5850 /// Ref_Incompatible - The two types are incompatible, so direct 5851 /// reference binding is not possible. 5852 Ref_Incompatible = 0, 5853 /// Ref_Related - The two types are reference-related, which means 5854 /// that their unqualified forms (T1 and T2) are either the same 5855 /// or T1 is a base class of T2. 5856 Ref_Related, 5857 /// Ref_Compatible_With_Added_Qualification - The two types are 5858 /// reference-compatible with added qualification, meaning that 5859 /// they are reference-compatible and the qualifiers on T1 (cv1) 5860 /// are greater than the qualifiers on T2 (cv2). 5861 Ref_Compatible_With_Added_Qualification, 5862 /// Ref_Compatible - The two types are reference-compatible and 5863 /// have equivalent qualifiers (cv1 == cv2). 5864 Ref_Compatible 5865 }; 5866 5867 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5868 QualType T1, QualType T2, 5869 bool &DerivedToBase, 5870 bool &ObjCConversion, 5871 bool &ObjCLifetimeConversion); 5872 5873 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5874 Expr *CastExpr, CastKind &CastKind, 5875 ExprValueKind &VK, CXXCastPath &Path); 5876 5877 // CheckVectorCast - check type constraints for vectors. 5878 // Since vectors are an extension, there are no C standard reference for this. 5879 // We allow casting between vectors and integer datatypes of the same size. 5880 // returns true if the cast is invalid 5881 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5882 CastKind &Kind); 5883 5884 // CheckExtVectorCast - check type constraints for extended vectors. 5885 // Since vectors are an extension, there are no C standard reference for this. 5886 // We allow casting between vectors and integer datatypes of the same size, 5887 // or vectors and the element type of that vector. 5888 // returns the cast expr 5889 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5890 CastKind &Kind); 5891 5892 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 5893 SourceLocation LParenLoc, 5894 Expr *CastExpr, 5895 SourceLocation RParenLoc); 5896 5897 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 5898 5899 /// \brief Checks for invalid conversions and casts between 5900 /// retainable pointers and other pointer kinds. 5901 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 5902 QualType castType, Expr *&op, 5903 CheckedConversionKind CCK); 5904 5905 Expr *stripARCUnbridgedCast(Expr *e); 5906 void diagnoseARCUnbridgedCast(Expr *e); 5907 5908 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5909 QualType ExprType); 5910 5911 /// checkRetainCycles - Check whether an Objective-C message send 5912 /// might create an obvious retain cycle. 5913 void checkRetainCycles(ObjCMessageExpr *msg); 5914 void checkRetainCycles(Expr *receiver, Expr *argument); 5915 5916 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5917 /// to weak/__unsafe_unretained type. 5918 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5919 5920 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5921 /// to weak/__unsafe_unretained expression. 5922 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5923 5924 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5925 /// \param Method - May be null. 5926 /// \param [out] ReturnType - The return type of the send. 5927 /// \return true iff there were any incompatible types. 5928 bool CheckMessageArgumentTypes(QualType ReceiverType, 5929 Expr **Args, unsigned NumArgs, Selector Sel, 5930 ObjCMethodDecl *Method, bool isClassMessage, 5931 bool isSuperMessage, 5932 SourceLocation lbrac, SourceLocation rbrac, 5933 QualType &ReturnType, ExprValueKind &VK); 5934 5935 /// \brief Determine the result of a message send expression based on 5936 /// the type of the receiver, the method expected to receive the message, 5937 /// and the form of the message send. 5938 QualType getMessageSendResultType(QualType ReceiverType, 5939 ObjCMethodDecl *Method, 5940 bool isClassMessage, bool isSuperMessage); 5941 5942 /// \brief If the given expression involves a message send to a method 5943 /// with a related result type, emit a note describing what happened. 5944 void EmitRelatedResultTypeNote(const Expr *E); 5945 5946 /// CheckBooleanCondition - Diagnose problems involving the use of 5947 /// the given expression as a boolean condition (e.g. in an if 5948 /// statement). Also performs the standard function and array 5949 /// decays, possibly changing the input variable. 5950 /// 5951 /// \param Loc - A location associated with the condition, e.g. the 5952 /// 'if' keyword. 5953 /// \return true iff there were any errors 5954 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5955 5956 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5957 Expr *SubExpr); 5958 5959 /// DiagnoseAssignmentAsCondition - Given that an expression is 5960 /// being used as a boolean condition, warn if it's an assignment. 5961 void DiagnoseAssignmentAsCondition(Expr *E); 5962 5963 /// \brief Redundant parentheses over an equality comparison can indicate 5964 /// that the user intended an assignment used as condition. 5965 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5966 5967 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5968 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5969 5970 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5971 /// the specified width and sign. If an overflow occurs, detect it and emit 5972 /// the specified diagnostic. 5973 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5974 unsigned NewWidth, bool NewSign, 5975 SourceLocation Loc, unsigned DiagID); 5976 5977 /// Checks that the Objective-C declaration is declared in the global scope. 5978 /// Emits an error and marks the declaration as invalid if it's not declared 5979 /// in the global scope. 5980 bool CheckObjCDeclScope(Decl *D); 5981 5982 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5983 /// and reports the appropriate diagnostics. Returns false on success. 5984 /// Can optionally return the value of the expression. 5985 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5986 5987 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5988 /// the correct width, and that the field type is valid. 5989 /// Returns false on success. 5990 /// Can optionally return whether the bit-field is of width 0 5991 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5992 QualType FieldTy, const Expr *BitWidth, 5993 bool *ZeroWidth = 0); 5994 5995 enum CUDAFunctionTarget { 5996 CFT_Device, 5997 CFT_Global, 5998 CFT_Host, 5999 CFT_HostDevice 6000 }; 6001 6002 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6003 6004 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6005 CUDAFunctionTarget CalleeTarget); 6006 6007 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6008 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6009 IdentifyCUDATarget(Callee)); 6010 } 6011 6012 /// \name Code completion 6013 //@{ 6014 /// \brief Describes the context in which code completion occurs. 6015 enum ParserCompletionContext { 6016 /// \brief Code completion occurs at top-level or namespace context. 6017 PCC_Namespace, 6018 /// \brief Code completion occurs within a class, struct, or union. 6019 PCC_Class, 6020 /// \brief Code completion occurs within an Objective-C interface, protocol, 6021 /// or category. 6022 PCC_ObjCInterface, 6023 /// \brief Code completion occurs within an Objective-C implementation or 6024 /// category implementation 6025 PCC_ObjCImplementation, 6026 /// \brief Code completion occurs within the list of instance variables 6027 /// in an Objective-C interface, protocol, category, or implementation. 6028 PCC_ObjCInstanceVariableList, 6029 /// \brief Code completion occurs following one or more template 6030 /// headers. 6031 PCC_Template, 6032 /// \brief Code completion occurs following one or more template 6033 /// headers within a class. 6034 PCC_MemberTemplate, 6035 /// \brief Code completion occurs within an expression. 6036 PCC_Expression, 6037 /// \brief Code completion occurs within a statement, which may 6038 /// also be an expression or a declaration. 6039 PCC_Statement, 6040 /// \brief Code completion occurs at the beginning of the 6041 /// initialization statement (or expression) in a for loop. 6042 PCC_ForInit, 6043 /// \brief Code completion occurs within the condition of an if, 6044 /// while, switch, or for statement. 6045 PCC_Condition, 6046 /// \brief Code completion occurs within the body of a function on a 6047 /// recovery path, where we do not have a specific handle on our position 6048 /// in the grammar. 6049 PCC_RecoveryInFunction, 6050 /// \brief Code completion occurs where only a type is permitted. 6051 PCC_Type, 6052 /// \brief Code completion occurs in a parenthesized expression, which 6053 /// might also be a type cast. 6054 PCC_ParenthesizedExpression, 6055 /// \brief Code completion occurs within a sequence of declaration 6056 /// specifiers within a function, method, or block. 6057 PCC_LocalDeclarationSpecifiers 6058 }; 6059 6060 void CodeCompleteOrdinaryName(Scope *S, 6061 ParserCompletionContext CompletionContext); 6062 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6063 bool AllowNonIdentifiers, 6064 bool AllowNestedNameSpecifiers); 6065 6066 struct CodeCompleteExpressionData; 6067 void CodeCompleteExpression(Scope *S, 6068 const CodeCompleteExpressionData &Data); 6069 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6070 SourceLocation OpLoc, 6071 bool IsArrow); 6072 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6073 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6074 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6075 void CodeCompleteCase(Scope *S); 6076 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6077 void CodeCompleteInitializer(Scope *S, Decl *D); 6078 void CodeCompleteReturn(Scope *S); 6079 void CodeCompleteAfterIf(Scope *S); 6080 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6081 6082 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6083 bool EnteringContext); 6084 void CodeCompleteUsing(Scope *S); 6085 void CodeCompleteUsingDirective(Scope *S); 6086 void CodeCompleteNamespaceDecl(Scope *S); 6087 void CodeCompleteNamespaceAliasDecl(Scope *S); 6088 void CodeCompleteOperatorName(Scope *S); 6089 void CodeCompleteConstructorInitializer(Decl *Constructor, 6090 CXXCtorInitializer** Initializers, 6091 unsigned NumInitializers); 6092 6093 void CodeCompleteObjCAtDirective(Scope *S); 6094 void CodeCompleteObjCAtVisibility(Scope *S); 6095 void CodeCompleteObjCAtStatement(Scope *S); 6096 void CodeCompleteObjCAtExpression(Scope *S); 6097 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6098 void CodeCompleteObjCPropertyGetter(Scope *S); 6099 void CodeCompleteObjCPropertySetter(Scope *S); 6100 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6101 bool IsParameter); 6102 void CodeCompleteObjCMessageReceiver(Scope *S); 6103 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6104 IdentifierInfo **SelIdents, 6105 unsigned NumSelIdents, 6106 bool AtArgumentExpression); 6107 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6108 IdentifierInfo **SelIdents, 6109 unsigned NumSelIdents, 6110 bool AtArgumentExpression, 6111 bool IsSuper = false); 6112 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6113 IdentifierInfo **SelIdents, 6114 unsigned NumSelIdents, 6115 bool AtArgumentExpression, 6116 ObjCInterfaceDecl *Super = 0); 6117 void CodeCompleteObjCForCollection(Scope *S, 6118 DeclGroupPtrTy IterationVar); 6119 void CodeCompleteObjCSelector(Scope *S, 6120 IdentifierInfo **SelIdents, 6121 unsigned NumSelIdents); 6122 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6123 unsigned NumProtocols); 6124 void CodeCompleteObjCProtocolDecl(Scope *S); 6125 void CodeCompleteObjCInterfaceDecl(Scope *S); 6126 void CodeCompleteObjCSuperclass(Scope *S, 6127 IdentifierInfo *ClassName, 6128 SourceLocation ClassNameLoc); 6129 void CodeCompleteObjCImplementationDecl(Scope *S); 6130 void CodeCompleteObjCInterfaceCategory(Scope *S, 6131 IdentifierInfo *ClassName, 6132 SourceLocation ClassNameLoc); 6133 void CodeCompleteObjCImplementationCategory(Scope *S, 6134 IdentifierInfo *ClassName, 6135 SourceLocation ClassNameLoc); 6136 void CodeCompleteObjCPropertyDefinition(Scope *S); 6137 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6138 IdentifierInfo *PropertyName); 6139 void CodeCompleteObjCMethodDecl(Scope *S, 6140 bool IsInstanceMethod, 6141 ParsedType ReturnType); 6142 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6143 bool IsInstanceMethod, 6144 bool AtParameterName, 6145 ParsedType ReturnType, 6146 IdentifierInfo **SelIdents, 6147 unsigned NumSelIdents); 6148 void CodeCompletePreprocessorDirective(bool InConditional); 6149 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6150 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6151 void CodeCompletePreprocessorExpression(); 6152 void CodeCompletePreprocessorMacroArgument(Scope *S, 6153 IdentifierInfo *Macro, 6154 MacroInfo *MacroInfo, 6155 unsigned Argument); 6156 void CodeCompleteNaturalLanguage(); 6157 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6158 SmallVectorImpl<CodeCompletionResult> &Results); 6159 //@} 6160 6161 //===--------------------------------------------------------------------===// 6162 // Extra semantic analysis beyond the C type system 6163 6164public: 6165 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6166 unsigned ByteNo) const; 6167 6168private: 6169 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6170 bool isSubscript=false, bool AllowOnePastEnd=true); 6171 void CheckArrayAccess(const Expr *E); 6172 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6173 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6174 6175 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6176 bool CheckObjCString(Expr *Arg); 6177 6178 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6179 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6180 6181 bool SemaBuiltinVAStart(CallExpr *TheCall); 6182 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6183 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6184 6185public: 6186 // Used by C++ template instantiation. 6187 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6188 6189private: 6190 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6191 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6192 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6193 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6194 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6195 AtomicExpr::AtomicOp Op); 6196 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6197 llvm::APSInt &Result); 6198 6199 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6200 bool HasVAListArg, unsigned format_idx, 6201 unsigned firstDataArg, bool isPrintf, 6202 bool inFunctionCall = true); 6203 6204 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6205 const CallExpr *TheCall, bool HasVAListArg, 6206 unsigned format_idx, unsigned firstDataArg, 6207 bool isPrintf, bool inFunctionCall); 6208 6209 void CheckNonNullArguments(const NonNullAttr *NonNull, 6210 const Expr * const *ExprArgs, 6211 SourceLocation CallSiteLoc); 6212 6213 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6214 unsigned format_idx, unsigned firstDataArg, 6215 bool isPrintf); 6216 6217 /// \brief Enumeration used to describe which of the memory setting or copying 6218 /// functions is being checked by \c CheckMemaccessArguments(). 6219 enum CheckedMemoryFunction { 6220 CMF_Memset, 6221 CMF_Memcpy, 6222 CMF_Memmove, 6223 CMF_Memcmp, 6224 CMF_Strncpy, 6225 CMF_Strncmp, 6226 CMF_Strncasecmp, 6227 CMF_Strncat, 6228 CMF_Strndup 6229 }; 6230 6231 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6232 IdentifierInfo *FnName); 6233 6234 void CheckStrlcpycatArguments(const CallExpr *Call, 6235 IdentifierInfo *FnName); 6236 6237 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6238 SourceLocation ReturnLoc); 6239 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6240 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6241 6242 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6243 Expr *Init); 6244 6245 /// \brief The parser's current scope. 6246 /// 6247 /// The parser maintains this state here. 6248 Scope *CurScope; 6249 6250protected: 6251 friend class Parser; 6252 friend class InitializationSequence; 6253 friend class ASTReader; 6254 friend class ASTWriter; 6255 6256public: 6257 /// \brief Retrieve the parser's current scope. 6258 /// 6259 /// This routine must only be used when it is certain that semantic analysis 6260 /// and the parser are in precisely the same context, which is not the case 6261 /// when, e.g., we are performing any kind of template instantiation. 6262 /// Therefore, the only safe places to use this scope are in the parser 6263 /// itself and in routines directly invoked from the parser and *never* from 6264 /// template substitution or instantiation. 6265 Scope *getCurScope() const { return CurScope; } 6266 6267 Decl *getObjCDeclContext() const; 6268 6269 DeclContext *getCurLexicalContext() const { 6270 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6271 } 6272 6273 AvailabilityResult getCurContextAvailability() const; 6274}; 6275 6276/// \brief RAII object that enters a new expression evaluation context. 6277class EnterExpressionEvaluationContext { 6278 Sema &Actions; 6279 6280public: 6281 EnterExpressionEvaluationContext(Sema &Actions, 6282 Sema::ExpressionEvaluationContext NewContext) 6283 : Actions(Actions) { 6284 Actions.PushExpressionEvaluationContext(NewContext); 6285 } 6286 6287 ~EnterExpressionEvaluationContext() { 6288 Actions.PopExpressionEvaluationContext(); 6289 } 6290}; 6291 6292} // end namespace clang 6293 6294#endif 6295