Sema.h revision 6dbba4fc128e2e2f5b26be996392bd32c0707f13
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 /// \brief Stack containing information about each of the nested 227 /// function, block, and method scopes that are currently active. 228 /// 229 /// This array is never empty. Clients should ignore the first 230 /// element, which is used to cache a single FunctionScopeInfo 231 /// that's used to parse every top-level function. 232 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 233 234 /// ExprTemporaries - This is the stack of temporaries that are created by 235 /// the current full expression. 236 SmallVector<CXXTemporary*, 8> ExprTemporaries; 237 238 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 239 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 240 ExtVectorDeclsType; 241 242 /// ExtVectorDecls - This is a list all the extended vector types. This allows 243 /// us to associate a raw vector type with one of the ext_vector type names. 244 /// This is only necessary for issuing pretty diagnostics. 245 ExtVectorDeclsType ExtVectorDecls; 246 247 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 248 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 249 250 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 251 252 /// PureVirtualClassDiagSet - a set of class declarations which we have 253 /// emitted a list of pure virtual functions. Used to prevent emitting the 254 /// same list more than once. 255 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 256 257 /// ParsingInitForAutoVars - a set of declarations with auto types for which 258 /// we are currently parsing the initializer. 259 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 260 261 /// \brief A mapping from external names to the most recent 262 /// locally-scoped external declaration with that name. 263 /// 264 /// This map contains external declarations introduced in local 265 /// scoped, e.g., 266 /// 267 /// \code 268 /// void f() { 269 /// void foo(int, int); 270 /// } 271 /// \endcode 272 /// 273 /// Here, the name "foo" will be associated with the declaration on 274 /// "foo" within f. This name is not visible outside of 275 /// "f". However, we still find it in two cases: 276 /// 277 /// - If we are declaring another external with the name "foo", we 278 /// can find "foo" as a previous declaration, so that the types 279 /// of this external declaration can be checked for 280 /// compatibility. 281 /// 282 /// - If we would implicitly declare "foo" (e.g., due to a call to 283 /// "foo" in C when no prototype or definition is visible), then 284 /// we find this declaration of "foo" and complain that it is 285 /// not visible. 286 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 287 288 /// \brief Look for a locally scoped external declaration by the given name. 289 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 290 findLocallyScopedExternalDecl(DeclarationName Name); 291 292 typedef LazyVector<VarDecl *, ExternalSemaSource, 293 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 294 TentativeDefinitionsType; 295 296 /// \brief All the tentative definitions encountered in the TU. 297 TentativeDefinitionsType TentativeDefinitions; 298 299 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 300 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 301 UnusedFileScopedDeclsType; 302 303 /// \brief The set of file scoped decls seen so far that have not been used 304 /// and must warn if not used. Only contains the first declaration. 305 UnusedFileScopedDeclsType UnusedFileScopedDecls; 306 307 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 308 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 309 DelegatingCtorDeclsType; 310 311 /// \brief All the delegating constructors seen so far in the file, used for 312 /// cycle detection at the end of the TU. 313 DelegatingCtorDeclsType DelegatingCtorDecls; 314 315 /// \brief All the overriding destructors seen during a class definition 316 /// (there could be multiple due to nested classes) that had their exception 317 /// spec checks delayed, plus the overridden destructor. 318 SmallVector<std::pair<const CXXDestructorDecl*, 319 const CXXDestructorDecl*>, 2> 320 DelayedDestructorExceptionSpecChecks; 321 322 /// \brief Callback to the parser to parse templated functions when needed. 323 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 324 LateTemplateParserCB *LateTemplateParser; 325 void *OpaqueParser; 326 327 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 328 LateTemplateParser = LTP; 329 OpaqueParser = P; 330 } 331 332 class DelayedDiagnostics; 333 334 class ParsingDeclState { 335 unsigned SavedStackSize; 336 friend class Sema::DelayedDiagnostics; 337 }; 338 339 class ProcessingContextState { 340 unsigned SavedParsingDepth; 341 unsigned SavedActiveStackBase; 342 friend class Sema::DelayedDiagnostics; 343 }; 344 345 /// A class which encapsulates the logic for delaying diagnostics 346 /// during parsing and other processing. 347 class DelayedDiagnostics { 348 /// \brief The stack of diagnostics that were delayed due to being 349 /// produced during the parsing of a declaration. 350 sema::DelayedDiagnostic *Stack; 351 352 /// \brief The number of objects on the delayed-diagnostics stack. 353 unsigned StackSize; 354 355 /// \brief The current capacity of the delayed-diagnostics stack. 356 unsigned StackCapacity; 357 358 /// \brief The index of the first "active" delayed diagnostic in 359 /// the stack. When parsing class definitions, we ignore active 360 /// delayed diagnostics from the surrounding context. 361 unsigned ActiveStackBase; 362 363 /// \brief The depth of the declarations we're currently parsing. 364 /// This gets saved and reset whenever we enter a class definition. 365 unsigned ParsingDepth; 366 367 public: 368 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 369 ActiveStackBase(0), ParsingDepth(0) {} 370 371 ~DelayedDiagnostics() { 372 delete[] reinterpret_cast<char*>(Stack); 373 } 374 375 /// Adds a delayed diagnostic. 376 void add(const sema::DelayedDiagnostic &diag); 377 378 /// Determines whether diagnostics should be delayed. 379 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 380 381 /// Observe that we've started parsing a declaration. Access and 382 /// deprecation diagnostics will be delayed; when the declaration 383 /// is completed, all active delayed diagnostics will be evaluated 384 /// in its context, and then active diagnostics stack will be 385 /// popped down to the saved depth. 386 ParsingDeclState pushParsingDecl() { 387 ParsingDepth++; 388 389 ParsingDeclState state; 390 state.SavedStackSize = StackSize; 391 return state; 392 } 393 394 /// Observe that we're completed parsing a declaration. 395 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 396 397 /// Observe that we've started processing a different context, the 398 /// contents of which are semantically separate from the 399 /// declarations it may lexically appear in. This sets aside the 400 /// current stack of active diagnostics and starts afresh. 401 ProcessingContextState pushContext() { 402 assert(StackSize >= ActiveStackBase); 403 404 ProcessingContextState state; 405 state.SavedParsingDepth = ParsingDepth; 406 state.SavedActiveStackBase = ActiveStackBase; 407 408 ActiveStackBase = StackSize; 409 ParsingDepth = 0; 410 411 return state; 412 } 413 414 /// Observe that we've stopped processing a context. This 415 /// restores the previous stack of active diagnostics. 416 void popContext(ProcessingContextState state) { 417 assert(ActiveStackBase == StackSize); 418 assert(ParsingDepth == 0); 419 ActiveStackBase = state.SavedActiveStackBase; 420 ParsingDepth = state.SavedParsingDepth; 421 } 422 } DelayedDiagnostics; 423 424 /// A RAII object to temporarily push a declaration context. 425 class ContextRAII { 426 private: 427 Sema &S; 428 DeclContext *SavedContext; 429 ProcessingContextState SavedContextState; 430 431 public: 432 ContextRAII(Sema &S, DeclContext *ContextToPush) 433 : S(S), SavedContext(S.CurContext), 434 SavedContextState(S.DelayedDiagnostics.pushContext()) 435 { 436 assert(ContextToPush && "pushing null context"); 437 S.CurContext = ContextToPush; 438 } 439 440 void pop() { 441 if (!SavedContext) return; 442 S.CurContext = SavedContext; 443 S.DelayedDiagnostics.popContext(SavedContextState); 444 SavedContext = 0; 445 } 446 447 ~ContextRAII() { 448 pop(); 449 } 450 }; 451 452 /// WeakUndeclaredIdentifiers - Identifiers contained in 453 /// #pragma weak before declared. rare. may alias another 454 /// identifier, declared or undeclared 455 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 456 457 /// \brief Load weak undeclared identifiers from the external source. 458 void LoadExternalWeakUndeclaredIdentifiers(); 459 460 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 461 /// #pragma weak during processing of other Decls. 462 /// I couldn't figure out a clean way to generate these in-line, so 463 /// we store them here and handle separately -- which is a hack. 464 /// It would be best to refactor this. 465 SmallVector<Decl*,2> WeakTopLevelDecl; 466 467 IdentifierResolver IdResolver; 468 469 /// Translation Unit Scope - useful to Objective-C actions that need 470 /// to lookup file scope declarations in the "ordinary" C decl namespace. 471 /// For example, user-defined classes, built-in "id" type, etc. 472 Scope *TUScope; 473 474 /// \brief The C++ "std" namespace, where the standard library resides. 475 LazyDeclPtr StdNamespace; 476 477 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 478 /// standard library. 479 LazyDeclPtr StdBadAlloc; 480 481 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 482 RecordDecl *CXXTypeInfoDecl; 483 484 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 485 RecordDecl *MSVCGuidDecl; 486 487 /// A flag to remember whether the implicit forms of operator new and delete 488 /// have been declared. 489 bool GlobalNewDeleteDeclared; 490 491 492 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 493 /// call was found yet. 494 bool ObjCShouldCallSuperDealloc; 495 /// A flag that is set when parsing a -finalize method and no [super finalize] 496 /// call was found yet. 497 bool ObjCShouldCallSuperFinalize; 498 499 /// \brief The set of declarations that have been referenced within 500 /// a potentially evaluated expression. 501 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 502 PotentiallyReferencedDecls; 503 504 /// \brief A set of diagnostics that may be emitted. 505 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 506 PotentiallyEmittedDiagnostics; 507 508 /// \brief Describes how the expressions currently being parsed are 509 /// evaluated at run-time, if at all. 510 enum ExpressionEvaluationContext { 511 /// \brief The current expression and its subexpressions occur within an 512 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 513 /// or the subexpression of \c sizeof, where the type or the value of the 514 /// expression may be significant but no code will be generated to evaluate 515 /// the value of the expression at run time. 516 Unevaluated, 517 518 /// \brief The current expression is potentially evaluated at run time, 519 /// which means that code may be generated to evaluate the value of the 520 /// expression at run time. 521 PotentiallyEvaluated, 522 523 /// \brief The current expression may be potentially evaluated or it may 524 /// be unevaluated, but it is impossible to tell from the lexical context. 525 /// This evaluation context is used primary for the operand of the C++ 526 /// \c typeid expression, whose argument is potentially evaluated only when 527 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 528 PotentiallyPotentiallyEvaluated, 529 530 /// \brief The current expression is potentially evaluated, but any 531 /// declarations referenced inside that expression are only used if 532 /// in fact the current expression is used. 533 /// 534 /// This value is used when parsing default function arguments, for which 535 /// we would like to provide diagnostics (e.g., passing non-POD arguments 536 /// through varargs) but do not want to mark declarations as "referenced" 537 /// until the default argument is used. 538 PotentiallyEvaluatedIfUsed 539 }; 540 541 /// \brief Data structure used to record current or nested 542 /// expression evaluation contexts. 543 struct ExpressionEvaluationContextRecord { 544 /// \brief The expression evaluation context. 545 ExpressionEvaluationContext Context; 546 547 /// \brief Whether the enclosing context needed a cleanup. 548 bool ParentNeedsCleanups; 549 550 /// \brief The number of temporaries that were active when we 551 /// entered this expression evaluation context. 552 unsigned NumTemporaries; 553 554 /// \brief The set of declarations referenced within a 555 /// potentially potentially-evaluated context. 556 /// 557 /// When leaving a potentially potentially-evaluated context, each 558 /// of these elements will be as referenced if the corresponding 559 /// potentially potentially evaluated expression is potentially 560 /// evaluated. 561 PotentiallyReferencedDecls *PotentiallyReferenced; 562 563 /// \brief The set of diagnostics to emit should this potentially 564 /// potentially-evaluated context become evaluated. 565 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 566 567 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 568 unsigned NumTemporaries, 569 bool ParentNeedsCleanups) 570 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 571 NumTemporaries(NumTemporaries), 572 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 573 574 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 575 if (!PotentiallyReferenced) 576 PotentiallyReferenced = new PotentiallyReferencedDecls; 577 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 578 } 579 580 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 581 if (!PotentiallyDiagnosed) 582 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 583 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 584 } 585 586 void Destroy() { 587 delete PotentiallyReferenced; 588 delete PotentiallyDiagnosed; 589 PotentiallyReferenced = 0; 590 PotentiallyDiagnosed = 0; 591 } 592 }; 593 594 /// A stack of expression evaluation contexts. 595 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 596 597 /// SpecialMemberOverloadResult - The overloading result for a special member 598 /// function. 599 /// 600 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 601 /// integer is used to determine whether we have a parameter qualification 602 /// match, the second-lowest is whether we had success in resolving the 603 /// overload to a unique non-deleted function. 604 /// 605 /// The ConstParamMatch bit represents whether, when looking up a copy 606 /// constructor or assignment operator, we found a potential copy 607 /// constructor/assignment operator whose first parameter is const-qualified. 608 /// This is used for determining parameter types of other objects and is 609 /// utterly meaningless on other types of special members. 610 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 611 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 612 public: 613 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 614 : FastFoldingSetNode(ID) 615 {} 616 617 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 618 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 619 620 bool hasSuccess() const { return Pair.getInt() & 0x1; } 621 void setSuccess(bool B) { 622 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 623 } 624 625 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 626 void setConstParamMatch(bool B) { 627 Pair.setInt(B << 1 | unsigned(hasSuccess())); 628 } 629 }; 630 631 /// \brief A cache of special member function overload resolution results 632 /// for C++ records. 633 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 634 635 /// \brief The kind of translation unit we are processing. 636 /// 637 /// When we're processing a complete translation unit, Sema will perform 638 /// end-of-translation-unit semantic tasks (such as creating 639 /// initializers for tentative definitions in C) once parsing has 640 /// completed. Modules and precompiled headers perform different kinds of 641 /// checks. 642 TranslationUnitKind TUKind; 643 644 llvm::BumpPtrAllocator BumpAlloc; 645 646 /// \brief The number of SFINAE diagnostics that have been trapped. 647 unsigned NumSFINAEErrors; 648 649 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 650 UnparsedDefaultArgInstantiationsMap; 651 652 /// \brief A mapping from parameters with unparsed default arguments to the 653 /// set of instantiations of each parameter. 654 /// 655 /// This mapping is a temporary data structure used when parsing 656 /// nested class templates or nested classes of class templates, 657 /// where we might end up instantiating an inner class before the 658 /// default arguments of its methods have been parsed. 659 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 660 661 // Contains the locations of the beginning of unparsed default 662 // argument locations. 663 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 664 665 /// UndefinedInternals - all the used, undefined objects with 666 /// internal linkage in this translation unit. 667 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 668 669 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 670 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 671 672 /// Method Pool - allows efficient lookup when typechecking messages to "id". 673 /// We need to maintain a list, since selectors can have differing signatures 674 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 675 /// of selectors are "overloaded"). 676 GlobalMethodPool MethodPool; 677 678 /// Method selectors used in a @selector expression. Used for implementation 679 /// of -Wselector. 680 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 681 682 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 683 684 /// Private Helper predicate to check for 'self'. 685 bool isSelfExpr(Expr *RExpr); 686public: 687 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 688 TranslationUnitKind TUKind = TU_Complete, 689 CodeCompleteConsumer *CompletionConsumer = 0); 690 ~Sema(); 691 692 /// \brief Perform initialization that occurs after the parser has been 693 /// initialized but before it parses anything. 694 void Initialize(); 695 696 const LangOptions &getLangOptions() const { return LangOpts; } 697 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 698 FPOptions &getFPOptions() { return FPFeatures; } 699 700 DiagnosticsEngine &getDiagnostics() const { return Diags; } 701 SourceManager &getSourceManager() const { return SourceMgr; } 702 const TargetAttributesSema &getTargetAttributesSema() const; 703 Preprocessor &getPreprocessor() const { return PP; } 704 ASTContext &getASTContext() const { return Context; } 705 ASTConsumer &getASTConsumer() const { return Consumer; } 706 ASTMutationListener *getASTMutationListener() const; 707 708 void PrintStats() const; 709 710 /// \brief Helper class that creates diagnostics with optional 711 /// template instantiation stacks. 712 /// 713 /// This class provides a wrapper around the basic DiagnosticBuilder 714 /// class that emits diagnostics. SemaDiagnosticBuilder is 715 /// responsible for emitting the diagnostic (as DiagnosticBuilder 716 /// does) and, if the diagnostic comes from inside a template 717 /// instantiation, printing the template instantiation stack as 718 /// well. 719 class SemaDiagnosticBuilder : public DiagnosticBuilder { 720 Sema &SemaRef; 721 unsigned DiagID; 722 723 public: 724 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 725 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 726 727 explicit SemaDiagnosticBuilder(Sema &SemaRef) 728 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 729 730 ~SemaDiagnosticBuilder(); 731 }; 732 733 /// \brief Emit a diagnostic. 734 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 735 736 /// \brief Emit a partial diagnostic. 737 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 738 739 /// \brief Build a partial diagnostic. 740 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 741 742 bool findMacroSpelling(SourceLocation &loc, StringRef name); 743 744 ExprResult Owned(Expr* E) { return E; } 745 ExprResult Owned(ExprResult R) { return R; } 746 StmtResult Owned(Stmt* S) { return S; } 747 748 void ActOnEndOfTranslationUnit(); 749 750 void CheckDelegatingCtorCycles(); 751 752 Scope *getScopeForContext(DeclContext *Ctx); 753 754 void PushFunctionScope(); 755 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 756 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 757 const Decl *D = 0, const BlockExpr *blkExpr = 0); 758 759 sema::FunctionScopeInfo *getCurFunction() const { 760 return FunctionScopes.back(); 761 } 762 763 bool hasAnyUnrecoverableErrorsInThisFunction() const; 764 765 /// \brief Retrieve the current block, if any. 766 sema::BlockScopeInfo *getCurBlock(); 767 768 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 769 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 770 771 //===--------------------------------------------------------------------===// 772 // Type Analysis / Processing: SemaType.cpp. 773 // 774 775 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 776 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 777 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 778 } 779 QualType BuildPointerType(QualType T, 780 SourceLocation Loc, DeclarationName Entity); 781 QualType BuildReferenceType(QualType T, bool LValueRef, 782 SourceLocation Loc, DeclarationName Entity); 783 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 784 Expr *ArraySize, unsigned Quals, 785 SourceRange Brackets, DeclarationName Entity); 786 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 787 SourceLocation AttrLoc); 788 QualType BuildFunctionType(QualType T, 789 QualType *ParamTypes, unsigned NumParamTypes, 790 bool Variadic, unsigned Quals, 791 RefQualifierKind RefQualifier, 792 SourceLocation Loc, DeclarationName Entity, 793 FunctionType::ExtInfo Info); 794 QualType BuildMemberPointerType(QualType T, QualType Class, 795 SourceLocation Loc, 796 DeclarationName Entity); 797 QualType BuildBlockPointerType(QualType T, 798 SourceLocation Loc, DeclarationName Entity); 799 QualType BuildParenType(QualType T); 800 QualType BuildAtomicType(QualType T, SourceLocation Loc); 801 802 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 803 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 804 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 805 TypeSourceInfo *ReturnTypeInfo); 806 /// \brief Package the given type and TSI into a ParsedType. 807 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 808 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 809 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 810 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 811 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 812 bool CheckDistantExceptionSpec(QualType T); 813 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 814 bool CheckEquivalentExceptionSpec( 815 const FunctionProtoType *Old, SourceLocation OldLoc, 816 const FunctionProtoType *New, SourceLocation NewLoc); 817 bool CheckEquivalentExceptionSpec( 818 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 819 const FunctionProtoType *Old, SourceLocation OldLoc, 820 const FunctionProtoType *New, SourceLocation NewLoc, 821 bool *MissingExceptionSpecification = 0, 822 bool *MissingEmptyExceptionSpecification = 0, 823 bool AllowNoexceptAllMatchWithNoSpec = false, 824 bool IsOperatorNew = false); 825 bool CheckExceptionSpecSubset( 826 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 827 const FunctionProtoType *Superset, SourceLocation SuperLoc, 828 const FunctionProtoType *Subset, SourceLocation SubLoc); 829 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 830 const FunctionProtoType *Target, SourceLocation TargetLoc, 831 const FunctionProtoType *Source, SourceLocation SourceLoc); 832 833 TypeResult ActOnTypeName(Scope *S, Declarator &D); 834 835 /// \brief The parser has parsed the context-sensitive type 'instancetype' 836 /// in an Objective-C message declaration. Return the appropriate type. 837 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 838 839 bool RequireCompleteType(SourceLocation Loc, QualType T, 840 const PartialDiagnostic &PD, 841 std::pair<SourceLocation, PartialDiagnostic> Note); 842 bool RequireCompleteType(SourceLocation Loc, QualType T, 843 const PartialDiagnostic &PD); 844 bool RequireCompleteType(SourceLocation Loc, QualType T, 845 unsigned DiagID); 846 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 847 std::pair<SourceLocation, 848 PartialDiagnostic> Note); 849 850 bool RequireLiteralType(SourceLocation Loc, QualType T, 851 const PartialDiagnostic &PD, 852 bool AllowIncompleteType = false); 853 854 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 855 const CXXScopeSpec &SS, QualType T); 856 857 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 858 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 859 QualType BuildUnaryTransformType(QualType BaseType, 860 UnaryTransformType::UTTKind UKind, 861 SourceLocation Loc); 862 863 //===--------------------------------------------------------------------===// 864 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 865 // 866 867 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 868 869 void DiagnoseUseOfUnimplementedSelectors(); 870 871 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 872 Scope *S, CXXScopeSpec *SS = 0, 873 bool isClassName = false, 874 bool HasTrailingDot = false, 875 ParsedType ObjectType = ParsedType(), 876 bool WantNontrivialTypeSourceInfo = false, 877 IdentifierInfo **CorrectedII = 0); 878 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 879 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 880 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 881 SourceLocation IILoc, 882 Scope *S, 883 CXXScopeSpec *SS, 884 ParsedType &SuggestedType); 885 886 /// \brief Describes the result of the name lookup and resolution performed 887 /// by \c ClassifyName(). 888 enum NameClassificationKind { 889 NC_Unknown, 890 NC_Error, 891 NC_Keyword, 892 NC_Type, 893 NC_Expression, 894 NC_NestedNameSpecifier, 895 NC_TypeTemplate, 896 NC_FunctionTemplate 897 }; 898 899 class NameClassification { 900 NameClassificationKind Kind; 901 ExprResult Expr; 902 TemplateName Template; 903 ParsedType Type; 904 const IdentifierInfo *Keyword; 905 906 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 907 908 public: 909 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 910 911 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 912 913 NameClassification(const IdentifierInfo *Keyword) 914 : Kind(NC_Keyword), Keyword(Keyword) { } 915 916 static NameClassification Error() { 917 return NameClassification(NC_Error); 918 } 919 920 static NameClassification Unknown() { 921 return NameClassification(NC_Unknown); 922 } 923 924 static NameClassification NestedNameSpecifier() { 925 return NameClassification(NC_NestedNameSpecifier); 926 } 927 928 static NameClassification TypeTemplate(TemplateName Name) { 929 NameClassification Result(NC_TypeTemplate); 930 Result.Template = Name; 931 return Result; 932 } 933 934 static NameClassification FunctionTemplate(TemplateName Name) { 935 NameClassification Result(NC_FunctionTemplate); 936 Result.Template = Name; 937 return Result; 938 } 939 940 NameClassificationKind getKind() const { return Kind; } 941 942 ParsedType getType() const { 943 assert(Kind == NC_Type); 944 return Type; 945 } 946 947 ExprResult getExpression() const { 948 assert(Kind == NC_Expression); 949 return Expr; 950 } 951 952 TemplateName getTemplateName() const { 953 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 954 return Template; 955 } 956 957 TemplateNameKind getTemplateNameKind() const { 958 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 959 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 960 } 961}; 962 963 /// \brief Perform name lookup on the given name, classifying it based on 964 /// the results of name lookup and the following token. 965 /// 966 /// This routine is used by the parser to resolve identifiers and help direct 967 /// parsing. When the identifier cannot be found, this routine will attempt 968 /// to correct the typo and classify based on the resulting name. 969 /// 970 /// \param S The scope in which we're performing name lookup. 971 /// 972 /// \param SS The nested-name-specifier that precedes the name. 973 /// 974 /// \param Name The identifier. If typo correction finds an alternative name, 975 /// this pointer parameter will be updated accordingly. 976 /// 977 /// \param NameLoc The location of the identifier. 978 /// 979 /// \param NextToken The token following the identifier. Used to help 980 /// disambiguate the name. 981 NameClassification ClassifyName(Scope *S, 982 CXXScopeSpec &SS, 983 IdentifierInfo *&Name, 984 SourceLocation NameLoc, 985 const Token &NextToken); 986 987 Decl *ActOnDeclarator(Scope *S, Declarator &D); 988 989 Decl *HandleDeclarator(Scope *S, Declarator &D, 990 MultiTemplateParamsArg TemplateParameterLists); 991 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 992 const LookupResult &Previous, 993 Scope *S); 994 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 995 void DiagnoseFunctionSpecifiers(Declarator& D); 996 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 997 void CheckShadow(Scope *S, VarDecl *D); 998 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 999 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1000 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1001 TypeSourceInfo *TInfo, 1002 LookupResult &Previous); 1003 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1004 LookupResult &Previous, bool &Redeclaration); 1005 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1006 TypeSourceInfo *TInfo, 1007 LookupResult &Previous, 1008 MultiTemplateParamsArg TemplateParamLists); 1009 // Returns true if the variable declaration is a redeclaration 1010 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1011 void CheckCompleteVariableDeclaration(VarDecl *var); 1012 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1013 TypeSourceInfo *TInfo, 1014 LookupResult &Previous, 1015 MultiTemplateParamsArg TemplateParamLists, 1016 bool &AddToScope); 1017 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1018 1019 /// \brief The kind of constexpr declaration checking we are performing. 1020 /// 1021 /// The kind affects which diagnostics (if any) are emitted if the function 1022 /// does not satisfy the requirements of a constexpr function declaration. 1023 enum CheckConstexprKind { 1024 /// \brief Check a constexpr function declaration, and produce errors if it 1025 /// does not satisfy the requirements. 1026 CCK_Declaration, 1027 /// \brief Check a constexpr function template instantiation. 1028 CCK_Instantiation, 1029 /// \brief Produce notes explaining why an instantiation was not constexpr. 1030 CCK_NoteNonConstexprInstantiation 1031 }; 1032 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, CheckConstexprKind CCK); 1033 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1034 1035 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1036 // Returns true if the function declaration is a redeclaration 1037 bool CheckFunctionDeclaration(Scope *S, 1038 FunctionDecl *NewFD, LookupResult &Previous, 1039 bool IsExplicitSpecialization); 1040 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1041 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1042 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1043 SourceLocation Loc, 1044 QualType T); 1045 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1046 SourceLocation NameLoc, IdentifierInfo *Name, 1047 QualType T, TypeSourceInfo *TSInfo, 1048 StorageClass SC, StorageClass SCAsWritten); 1049 void ActOnParamDefaultArgument(Decl *param, 1050 SourceLocation EqualLoc, 1051 Expr *defarg); 1052 void ActOnParamUnparsedDefaultArgument(Decl *param, 1053 SourceLocation EqualLoc, 1054 SourceLocation ArgLoc); 1055 void ActOnParamDefaultArgumentError(Decl *param); 1056 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1057 SourceLocation EqualLoc); 1058 1059 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1060 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1061 bool TypeMayContainAuto); 1062 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1063 void ActOnInitializerError(Decl *Dcl); 1064 void ActOnCXXForRangeDecl(Decl *D); 1065 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1066 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1067 void FinalizeDeclaration(Decl *D); 1068 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1069 Decl **Group, 1070 unsigned NumDecls); 1071 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1072 bool TypeMayContainAuto = true); 1073 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1074 SourceLocation LocAfterDecls); 1075 void CheckForFunctionRedefinition(FunctionDecl *FD); 1076 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1077 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1078 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1079 1080 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1081 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1082 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1083 1084 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1085 /// attribute for which parsing is delayed. 1086 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1087 1088 /// \brief Diagnose any unused parameters in the given sequence of 1089 /// ParmVarDecl pointers. 1090 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1091 ParmVarDecl * const *End); 1092 1093 /// \brief Diagnose whether the size of parameters or return value of a 1094 /// function or obj-c method definition is pass-by-value and larger than a 1095 /// specified threshold. 1096 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1097 ParmVarDecl * const *End, 1098 QualType ReturnTy, 1099 NamedDecl *D); 1100 1101 void DiagnoseInvalidJumps(Stmt *Body); 1102 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1103 SourceLocation AsmLoc, 1104 SourceLocation RParenLoc); 1105 1106 /// \brief The parser has processed a module import declaration. 1107 /// 1108 /// \param ImportLoc The location of the '__import_module__' keyword. 1109 /// 1110 /// \param ModuleName The name of the module. 1111 /// 1112 /// \param ModuleNameLoc The location of the module name. 1113 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1114 IdentifierInfo &ModuleName, 1115 SourceLocation ModuleNameLoc); 1116 1117 /// \brief Diagnose that \p New is a module-private redeclaration of 1118 /// \p Old. 1119 void diagnoseModulePrivateRedeclaration(NamedDecl *New, NamedDecl *Old, 1120 SourceLocation ModulePrivateKeyword 1121 = SourceLocation()); 1122 1123 /// \brief Retrieve a suitable printing policy. 1124 PrintingPolicy getPrintingPolicy() const; 1125 1126 /// Scope actions. 1127 void ActOnPopScope(SourceLocation Loc, Scope *S); 1128 void ActOnTranslationUnitScope(Scope *S); 1129 1130 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1131 DeclSpec &DS); 1132 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1133 DeclSpec &DS, 1134 MultiTemplateParamsArg TemplateParams); 1135 1136 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1137 1138 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1139 AccessSpecifier AS, 1140 RecordDecl *Record); 1141 1142 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1143 RecordDecl *Record); 1144 1145 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1146 TagTypeKind NewTag, bool isDefinition, 1147 SourceLocation NewTagLoc, 1148 const IdentifierInfo &Name); 1149 1150 enum TagUseKind { 1151 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1152 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1153 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1154 TUK_Friend // Friend declaration: 'friend struct foo;' 1155 }; 1156 1157 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1158 SourceLocation KWLoc, CXXScopeSpec &SS, 1159 IdentifierInfo *Name, SourceLocation NameLoc, 1160 AttributeList *Attr, AccessSpecifier AS, 1161 SourceLocation ModulePrivateLoc, 1162 MultiTemplateParamsArg TemplateParameterLists, 1163 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1164 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1165 1166 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1167 unsigned TagSpec, SourceLocation TagLoc, 1168 CXXScopeSpec &SS, 1169 IdentifierInfo *Name, SourceLocation NameLoc, 1170 AttributeList *Attr, 1171 MultiTemplateParamsArg TempParamLists); 1172 1173 TypeResult ActOnDependentTag(Scope *S, 1174 unsigned TagSpec, 1175 TagUseKind TUK, 1176 const CXXScopeSpec &SS, 1177 IdentifierInfo *Name, 1178 SourceLocation TagLoc, 1179 SourceLocation NameLoc); 1180 1181 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1182 IdentifierInfo *ClassName, 1183 SmallVectorImpl<Decl *> &Decls); 1184 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1185 Declarator &D, Expr *BitfieldWidth); 1186 1187 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1188 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1189 AccessSpecifier AS); 1190 1191 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1192 TypeSourceInfo *TInfo, 1193 RecordDecl *Record, SourceLocation Loc, 1194 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1195 SourceLocation TSSL, 1196 AccessSpecifier AS, NamedDecl *PrevDecl, 1197 Declarator *D = 0); 1198 1199 enum CXXSpecialMember { 1200 CXXDefaultConstructor, 1201 CXXCopyConstructor, 1202 CXXMoveConstructor, 1203 CXXCopyAssignment, 1204 CXXMoveAssignment, 1205 CXXDestructor, 1206 CXXInvalid 1207 }; 1208 bool CheckNontrivialField(FieldDecl *FD); 1209 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1210 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1211 void ActOnLastBitfield(SourceLocation DeclStart, 1212 SmallVectorImpl<Decl *> &AllIvarDecls); 1213 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1214 Declarator &D, Expr *BitfieldWidth, 1215 tok::ObjCKeywordKind visibility); 1216 1217 // This is used for both record definitions and ObjC interface declarations. 1218 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1219 llvm::ArrayRef<Decl *> Fields, 1220 SourceLocation LBrac, SourceLocation RBrac, 1221 AttributeList *AttrList); 1222 1223 /// ActOnTagStartDefinition - Invoked when we have entered the 1224 /// scope of a tag's definition (e.g., for an enumeration, class, 1225 /// struct, or union). 1226 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1227 1228 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1229 1230 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1231 /// C++ record definition's base-specifiers clause and are starting its 1232 /// member declarations. 1233 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1234 SourceLocation FinalLoc, 1235 SourceLocation LBraceLoc); 1236 1237 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1238 /// the definition of a tag (enumeration, class, struct, or union). 1239 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1240 SourceLocation RBraceLoc); 1241 1242 void ActOnObjCContainerFinishDefinition(); 1243 1244 /// \brief Invoked when we must temporarily exit the objective-c container 1245 /// scope for parsing/looking-up C constructs. 1246 /// 1247 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1248 void ActOnObjCTemporaryExitContainerContext(); 1249 void ActOnObjCReenterContainerContext(); 1250 1251 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1252 /// error parsing the definition of a tag. 1253 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1254 1255 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1256 EnumConstantDecl *LastEnumConst, 1257 SourceLocation IdLoc, 1258 IdentifierInfo *Id, 1259 Expr *val); 1260 1261 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1262 SourceLocation IdLoc, IdentifierInfo *Id, 1263 AttributeList *Attrs, 1264 SourceLocation EqualLoc, Expr *Val); 1265 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1266 SourceLocation RBraceLoc, Decl *EnumDecl, 1267 Decl **Elements, unsigned NumElements, 1268 Scope *S, AttributeList *Attr); 1269 1270 DeclContext *getContainingDC(DeclContext *DC); 1271 1272 /// Set the current declaration context until it gets popped. 1273 void PushDeclContext(Scope *S, DeclContext *DC); 1274 void PopDeclContext(); 1275 1276 /// EnterDeclaratorContext - Used when we must lookup names in the context 1277 /// of a declarator's nested name specifier. 1278 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1279 void ExitDeclaratorContext(Scope *S); 1280 1281 /// Push the parameters of D, which must be a function, into scope. 1282 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1283 void ActOnExitFunctionContext() { PopDeclContext(); } 1284 1285 DeclContext *getFunctionLevelDeclContext(); 1286 1287 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1288 /// to the function decl for the function being parsed. If we're currently 1289 /// in a 'block', this returns the containing context. 1290 FunctionDecl *getCurFunctionDecl(); 1291 1292 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1293 /// the method decl for the method being parsed. If we're currently 1294 /// in a 'block', this returns the containing context. 1295 ObjCMethodDecl *getCurMethodDecl(); 1296 1297 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1298 /// or C function we're in, otherwise return null. If we're currently 1299 /// in a 'block', this returns the containing context. 1300 NamedDecl *getCurFunctionOrMethodDecl(); 1301 1302 /// Add this decl to the scope shadowed decl chains. 1303 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1304 1305 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1306 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1307 /// true if 'D' belongs to the given declaration context. 1308 /// 1309 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1310 /// whether the declaration is in scope for the purposes of explicit template 1311 /// instantiation or specialization. The default is false. 1312 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1313 bool ExplicitInstantiationOrSpecialization = false); 1314 1315 /// Finds the scope corresponding to the given decl context, if it 1316 /// happens to be an enclosing scope. Otherwise return NULL. 1317 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1318 1319 /// Subroutines of ActOnDeclarator(). 1320 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1321 TypeSourceInfo *TInfo); 1322 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1323 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1324 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1325 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1326 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1327 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1328 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1329 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1330 1331 // AssignmentAction - This is used by all the assignment diagnostic functions 1332 // to represent what is actually causing the operation 1333 enum AssignmentAction { 1334 AA_Assigning, 1335 AA_Passing, 1336 AA_Returning, 1337 AA_Converting, 1338 AA_Initializing, 1339 AA_Sending, 1340 AA_Casting 1341 }; 1342 1343 /// C++ Overloading. 1344 enum OverloadKind { 1345 /// This is a legitimate overload: the existing declarations are 1346 /// functions or function templates with different signatures. 1347 Ovl_Overload, 1348 1349 /// This is not an overload because the signature exactly matches 1350 /// an existing declaration. 1351 Ovl_Match, 1352 1353 /// This is not an overload because the lookup results contain a 1354 /// non-function. 1355 Ovl_NonFunction 1356 }; 1357 OverloadKind CheckOverload(Scope *S, 1358 FunctionDecl *New, 1359 const LookupResult &OldDecls, 1360 NamedDecl *&OldDecl, 1361 bool IsForUsingDecl); 1362 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1363 1364 /// \brief Checks availability of the function depending on the current 1365 /// function context.Inside an unavailable function,unavailability is ignored. 1366 /// 1367 /// \returns true if \arg FD is unavailable and current context is inside 1368 /// an available function, false otherwise. 1369 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1370 1371 ImplicitConversionSequence 1372 TryImplicitConversion(Expr *From, QualType ToType, 1373 bool SuppressUserConversions, 1374 bool AllowExplicit, 1375 bool InOverloadResolution, 1376 bool CStyle, 1377 bool AllowObjCWritebackConversion); 1378 1379 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1380 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1381 bool IsComplexPromotion(QualType FromType, QualType ToType); 1382 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1383 bool InOverloadResolution, 1384 QualType& ConvertedType, bool &IncompatibleObjC); 1385 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1386 QualType& ConvertedType, bool &IncompatibleObjC); 1387 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1388 QualType &ConvertedType); 1389 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1390 QualType& ConvertedType); 1391 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1392 const FunctionProtoType *NewType); 1393 1394 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1395 bool CheckPointerConversion(Expr *From, QualType ToType, 1396 CastKind &Kind, 1397 CXXCastPath& BasePath, 1398 bool IgnoreBaseAccess); 1399 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1400 bool InOverloadResolution, 1401 QualType &ConvertedType); 1402 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1403 CastKind &Kind, 1404 CXXCastPath &BasePath, 1405 bool IgnoreBaseAccess); 1406 bool IsQualificationConversion(QualType FromType, QualType ToType, 1407 bool CStyle, bool &ObjCLifetimeConversion); 1408 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1409 QualType &ResultTy); 1410 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1411 1412 1413 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1414 const VarDecl *NRVOCandidate, 1415 QualType ResultType, 1416 Expr *Value, 1417 bool AllowNRVO = true); 1418 1419 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1420 ExprResult Init); 1421 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1422 SourceLocation EqualLoc, 1423 ExprResult Init, 1424 bool TopLevelOfInitList = false); 1425 ExprResult PerformObjectArgumentInitialization(Expr *From, 1426 NestedNameSpecifier *Qualifier, 1427 NamedDecl *FoundDecl, 1428 CXXMethodDecl *Method); 1429 1430 ExprResult PerformContextuallyConvertToBool(Expr *From); 1431 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1432 1433 ExprResult 1434 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1435 const PartialDiagnostic &NotIntDiag, 1436 const PartialDiagnostic &IncompleteDiag, 1437 const PartialDiagnostic &ExplicitConvDiag, 1438 const PartialDiagnostic &ExplicitConvNote, 1439 const PartialDiagnostic &AmbigDiag, 1440 const PartialDiagnostic &AmbigNote, 1441 const PartialDiagnostic &ConvDiag); 1442 1443 ExprResult PerformObjectMemberConversion(Expr *From, 1444 NestedNameSpecifier *Qualifier, 1445 NamedDecl *FoundDecl, 1446 NamedDecl *Member); 1447 1448 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1449 // TODO: make this is a typesafe union. 1450 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1451 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1452 1453 void AddOverloadCandidate(NamedDecl *Function, 1454 DeclAccessPair FoundDecl, 1455 Expr **Args, unsigned NumArgs, 1456 OverloadCandidateSet &CandidateSet); 1457 1458 void AddOverloadCandidate(FunctionDecl *Function, 1459 DeclAccessPair FoundDecl, 1460 Expr **Args, unsigned NumArgs, 1461 OverloadCandidateSet& CandidateSet, 1462 bool SuppressUserConversions = false, 1463 bool PartialOverloading = false); 1464 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1465 Expr **Args, unsigned NumArgs, 1466 OverloadCandidateSet& CandidateSet, 1467 bool SuppressUserConversions = false); 1468 void AddMethodCandidate(DeclAccessPair FoundDecl, 1469 QualType ObjectType, 1470 Expr::Classification ObjectClassification, 1471 Expr **Args, unsigned NumArgs, 1472 OverloadCandidateSet& CandidateSet, 1473 bool SuppressUserConversion = false); 1474 void AddMethodCandidate(CXXMethodDecl *Method, 1475 DeclAccessPair FoundDecl, 1476 CXXRecordDecl *ActingContext, QualType ObjectType, 1477 Expr::Classification ObjectClassification, 1478 Expr **Args, unsigned NumArgs, 1479 OverloadCandidateSet& CandidateSet, 1480 bool SuppressUserConversions = false); 1481 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1482 DeclAccessPair FoundDecl, 1483 CXXRecordDecl *ActingContext, 1484 TemplateArgumentListInfo *ExplicitTemplateArgs, 1485 QualType ObjectType, 1486 Expr::Classification ObjectClassification, 1487 Expr **Args, unsigned NumArgs, 1488 OverloadCandidateSet& CandidateSet, 1489 bool SuppressUserConversions = false); 1490 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1491 DeclAccessPair FoundDecl, 1492 TemplateArgumentListInfo *ExplicitTemplateArgs, 1493 Expr **Args, unsigned NumArgs, 1494 OverloadCandidateSet& CandidateSet, 1495 bool SuppressUserConversions = false); 1496 void AddConversionCandidate(CXXConversionDecl *Conversion, 1497 DeclAccessPair FoundDecl, 1498 CXXRecordDecl *ActingContext, 1499 Expr *From, QualType ToType, 1500 OverloadCandidateSet& CandidateSet); 1501 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1502 DeclAccessPair FoundDecl, 1503 CXXRecordDecl *ActingContext, 1504 Expr *From, QualType ToType, 1505 OverloadCandidateSet &CandidateSet); 1506 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1507 DeclAccessPair FoundDecl, 1508 CXXRecordDecl *ActingContext, 1509 const FunctionProtoType *Proto, 1510 Expr *Object, Expr **Args, unsigned NumArgs, 1511 OverloadCandidateSet& CandidateSet); 1512 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1513 SourceLocation OpLoc, 1514 Expr **Args, unsigned NumArgs, 1515 OverloadCandidateSet& CandidateSet, 1516 SourceRange OpRange = SourceRange()); 1517 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1518 Expr **Args, unsigned NumArgs, 1519 OverloadCandidateSet& CandidateSet, 1520 bool IsAssignmentOperator = false, 1521 unsigned NumContextualBoolArguments = 0); 1522 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1523 SourceLocation OpLoc, 1524 Expr **Args, unsigned NumArgs, 1525 OverloadCandidateSet& CandidateSet); 1526 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1527 bool Operator, 1528 Expr **Args, unsigned NumArgs, 1529 TemplateArgumentListInfo *ExplicitTemplateArgs, 1530 OverloadCandidateSet& CandidateSet, 1531 bool PartialOverloading = false, 1532 bool StdNamespaceIsAssociated = false); 1533 1534 // Emit as a 'note' the specific overload candidate 1535 void NoteOverloadCandidate(FunctionDecl *Fn); 1536 1537 // Emit as a series of 'note's all template and non-templates 1538 // identified by the expression Expr 1539 void NoteAllOverloadCandidates(Expr* E); 1540 1541 // [PossiblyAFunctionType] --> [Return] 1542 // NonFunctionType --> NonFunctionType 1543 // R (A) --> R(A) 1544 // R (*)(A) --> R (A) 1545 // R (&)(A) --> R (A) 1546 // R (S::*)(A) --> R (A) 1547 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1548 1549 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1550 bool Complain, 1551 DeclAccessPair &Found); 1552 1553 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1554 bool Complain = false, 1555 DeclAccessPair* Found = 0); 1556 1557 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1558 ExprResult &SrcExpr, 1559 bool DoFunctionPointerConverion = false, 1560 bool Complain = false, 1561 const SourceRange& OpRangeForComplaining = SourceRange(), 1562 QualType DestTypeForComplaining = QualType(), 1563 unsigned DiagIDForComplaining = 0); 1564 1565 1566 Expr *FixOverloadedFunctionReference(Expr *E, 1567 DeclAccessPair FoundDecl, 1568 FunctionDecl *Fn); 1569 ExprResult FixOverloadedFunctionReference(ExprResult, 1570 DeclAccessPair FoundDecl, 1571 FunctionDecl *Fn); 1572 1573 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1574 Expr **Args, unsigned NumArgs, 1575 OverloadCandidateSet &CandidateSet, 1576 bool PartialOverloading = false); 1577 1578 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1579 UnresolvedLookupExpr *ULE, 1580 SourceLocation LParenLoc, 1581 Expr **Args, unsigned NumArgs, 1582 SourceLocation RParenLoc, 1583 Expr *ExecConfig); 1584 1585 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1586 unsigned Opc, 1587 const UnresolvedSetImpl &Fns, 1588 Expr *input); 1589 1590 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1591 unsigned Opc, 1592 const UnresolvedSetImpl &Fns, 1593 Expr *LHS, Expr *RHS); 1594 1595 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1596 SourceLocation RLoc, 1597 Expr *Base,Expr *Idx); 1598 1599 ExprResult 1600 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1601 SourceLocation LParenLoc, Expr **Args, 1602 unsigned NumArgs, SourceLocation RParenLoc); 1603 ExprResult 1604 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1605 Expr **Args, unsigned NumArgs, 1606 SourceLocation RParenLoc); 1607 1608 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1609 SourceLocation OpLoc); 1610 1611 /// CheckCallReturnType - Checks that a call expression's return type is 1612 /// complete. Returns true on failure. The location passed in is the location 1613 /// that best represents the call. 1614 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1615 CallExpr *CE, FunctionDecl *FD); 1616 1617 /// Helpers for dealing with blocks and functions. 1618 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1619 bool CheckParameterNames); 1620 void CheckCXXDefaultArguments(FunctionDecl *FD); 1621 void CheckExtraCXXDefaultArguments(Declarator &D); 1622 Scope *getNonFieldDeclScope(Scope *S); 1623 1624 /// \name Name lookup 1625 /// 1626 /// These routines provide name lookup that is used during semantic 1627 /// analysis to resolve the various kinds of names (identifiers, 1628 /// overloaded operator names, constructor names, etc.) into zero or 1629 /// more declarations within a particular scope. The major entry 1630 /// points are LookupName, which performs unqualified name lookup, 1631 /// and LookupQualifiedName, which performs qualified name lookup. 1632 /// 1633 /// All name lookup is performed based on some specific criteria, 1634 /// which specify what names will be visible to name lookup and how 1635 /// far name lookup should work. These criteria are important both 1636 /// for capturing language semantics (certain lookups will ignore 1637 /// certain names, for example) and for performance, since name 1638 /// lookup is often a bottleneck in the compilation of C++. Name 1639 /// lookup criteria is specified via the LookupCriteria enumeration. 1640 /// 1641 /// The results of name lookup can vary based on the kind of name 1642 /// lookup performed, the current language, and the translation 1643 /// unit. In C, for example, name lookup will either return nothing 1644 /// (no entity found) or a single declaration. In C++, name lookup 1645 /// can additionally refer to a set of overloaded functions or 1646 /// result in an ambiguity. All of the possible results of name 1647 /// lookup are captured by the LookupResult class, which provides 1648 /// the ability to distinguish among them. 1649 //@{ 1650 1651 /// @brief Describes the kind of name lookup to perform. 1652 enum LookupNameKind { 1653 /// Ordinary name lookup, which finds ordinary names (functions, 1654 /// variables, typedefs, etc.) in C and most kinds of names 1655 /// (functions, variables, members, types, etc.) in C++. 1656 LookupOrdinaryName = 0, 1657 /// Tag name lookup, which finds the names of enums, classes, 1658 /// structs, and unions. 1659 LookupTagName, 1660 /// Label name lookup. 1661 LookupLabel, 1662 /// Member name lookup, which finds the names of 1663 /// class/struct/union members. 1664 LookupMemberName, 1665 /// Look up of an operator name (e.g., operator+) for use with 1666 /// operator overloading. This lookup is similar to ordinary name 1667 /// lookup, but will ignore any declarations that are class members. 1668 LookupOperatorName, 1669 /// Look up of a name that precedes the '::' scope resolution 1670 /// operator in C++. This lookup completely ignores operator, object, 1671 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1672 LookupNestedNameSpecifierName, 1673 /// Look up a namespace name within a C++ using directive or 1674 /// namespace alias definition, ignoring non-namespace names (C++ 1675 /// [basic.lookup.udir]p1). 1676 LookupNamespaceName, 1677 /// Look up all declarations in a scope with the given name, 1678 /// including resolved using declarations. This is appropriate 1679 /// for checking redeclarations for a using declaration. 1680 LookupUsingDeclName, 1681 /// Look up an ordinary name that is going to be redeclared as a 1682 /// name with linkage. This lookup ignores any declarations that 1683 /// are outside of the current scope unless they have linkage. See 1684 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1685 LookupRedeclarationWithLinkage, 1686 /// Look up the name of an Objective-C protocol. 1687 LookupObjCProtocolName, 1688 /// Look up implicit 'self' parameter of an objective-c method. 1689 LookupObjCImplicitSelfParam, 1690 /// \brief Look up any declaration with any name. 1691 LookupAnyName 1692 }; 1693 1694 /// \brief Specifies whether (or how) name lookup is being performed for a 1695 /// redeclaration (vs. a reference). 1696 enum RedeclarationKind { 1697 /// \brief The lookup is a reference to this name that is not for the 1698 /// purpose of redeclaring the name. 1699 NotForRedeclaration = 0, 1700 /// \brief The lookup results will be used for redeclaration of a name, 1701 /// if an entity by that name already exists. 1702 ForRedeclaration 1703 }; 1704 1705private: 1706 bool CppLookupName(LookupResult &R, Scope *S); 1707 1708 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1709 CXXSpecialMember SM, 1710 bool ConstArg, 1711 bool VolatileArg, 1712 bool RValueThis, 1713 bool ConstThis, 1714 bool VolatileThis); 1715 1716 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1717 // 1718 // The boolean value will be true to indicate that the namespace was loaded 1719 // from an AST/PCH file, or false otherwise. 1720 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1721 1722 /// \brief Whether we have already loaded known namespaces from an extenal 1723 /// source. 1724 bool LoadedExternalKnownNamespaces; 1725 1726public: 1727 /// \brief Look up a name, looking for a single declaration. Return 1728 /// null if the results were absent, ambiguous, or overloaded. 1729 /// 1730 /// It is preferable to use the elaborated form and explicitly handle 1731 /// ambiguity and overloaded. 1732 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1733 SourceLocation Loc, 1734 LookupNameKind NameKind, 1735 RedeclarationKind Redecl 1736 = NotForRedeclaration); 1737 bool LookupName(LookupResult &R, Scope *S, 1738 bool AllowBuiltinCreation = false); 1739 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1740 bool InUnqualifiedLookup = false); 1741 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1742 bool AllowBuiltinCreation = false, 1743 bool EnteringContext = false); 1744 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1745 1746 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1747 QualType T1, QualType T2, 1748 UnresolvedSetImpl &Functions); 1749 1750 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1751 SourceLocation GnuLabelLoc = SourceLocation()); 1752 1753 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1754 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1755 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1756 unsigned Quals, 1757 bool *ConstParam = 0); 1758 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1759 bool RValueThis, unsigned ThisQuals, 1760 bool *ConstParam = 0); 1761 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1762 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1763 unsigned ThisQuals); 1764 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1765 1766 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1767 Expr **Args, unsigned NumArgs, 1768 ADLResult &Functions, 1769 bool StdNamespaceIsAssociated = false); 1770 1771 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1772 VisibleDeclConsumer &Consumer, 1773 bool IncludeGlobalScope = true); 1774 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1775 VisibleDeclConsumer &Consumer, 1776 bool IncludeGlobalScope = true); 1777 1778 /// \brief The context in which typo-correction occurs. 1779 /// 1780 /// The typo-correction context affects which keywords (if any) are 1781 /// considered when trying to correct for typos. 1782 enum CorrectTypoContext { 1783 /// \brief An unknown context, where any keyword might be valid. 1784 CTC_Unknown, 1785 /// \brief A context where no keywords are used (e.g. we expect an actual 1786 /// name). 1787 CTC_NoKeywords, 1788 /// \brief A context where we're correcting a type name. 1789 CTC_Type, 1790 /// \brief An expression context. 1791 CTC_Expression, 1792 /// \brief A type cast, or anything else that can be followed by a '<'. 1793 CTC_CXXCasts, 1794 /// \brief A member lookup context. 1795 CTC_MemberLookup, 1796 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1797 CTC_ObjCIvarLookup, 1798 /// \brief An Objective-C property lookup context (e.g., self.prop). 1799 CTC_ObjCPropertyLookup, 1800 /// \brief The receiver of an Objective-C message send within an 1801 /// Objective-C method where 'super' is a valid keyword. 1802 CTC_ObjCMessageReceiver 1803 }; 1804 1805 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1806 Sema::LookupNameKind LookupKind, 1807 Scope *S, CXXScopeSpec *SS, 1808 DeclContext *MemberContext = NULL, 1809 bool EnteringContext = false, 1810 CorrectTypoContext CTC = CTC_Unknown, 1811 const ObjCObjectPointerType *OPT = NULL); 1812 1813 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1814 AssociatedNamespaceSet &AssociatedNamespaces, 1815 AssociatedClassSet &AssociatedClasses); 1816 1817 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1818 bool ConsiderLinkage, 1819 bool ExplicitInstantiationOrSpecialization); 1820 1821 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1822 //@} 1823 1824 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1825 SourceLocation IdLoc, 1826 bool TypoCorrection = false); 1827 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1828 Scope *S, bool ForRedeclaration, 1829 SourceLocation Loc); 1830 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1831 Scope *S); 1832 void AddKnownFunctionAttributes(FunctionDecl *FD); 1833 1834 // More parsing and symbol table subroutines. 1835 1836 // Decl attributes - this routine is the top level dispatcher. 1837 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1838 bool NonInheritable = true, bool Inheritable = true); 1839 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1840 bool NonInheritable = true, bool Inheritable = true); 1841 1842 void checkUnusedDeclAttributes(Declarator &D); 1843 1844 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1845 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1846 bool CheckNoReturnAttr(const AttributeList &attr); 1847 1848 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1849 bool &IncompleteImpl, unsigned DiagID); 1850 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1851 ObjCMethodDecl *MethodDecl, 1852 bool IsProtocolMethodDecl); 1853 1854 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1855 ObjCMethodDecl *Overridden, 1856 bool IsProtocolMethodDecl); 1857 1858 /// WarnExactTypedMethods - This routine issues a warning if method 1859 /// implementation declaration matches exactly that of its declaration. 1860 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1861 ObjCMethodDecl *MethodDecl, 1862 bool IsProtocolMethodDecl); 1863 1864 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1865 ObjCInterfaceDecl *IDecl); 1866 1867 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1868 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1869 1870 /// CheckProtocolMethodDefs - This routine checks unimplemented 1871 /// methods declared in protocol, and those referenced by it. 1872 /// \param IDecl - Used for checking for methods which may have been 1873 /// inherited. 1874 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1875 ObjCProtocolDecl *PDecl, 1876 bool& IncompleteImpl, 1877 const SelectorSet &InsMap, 1878 const SelectorSet &ClsMap, 1879 ObjCContainerDecl *CDecl); 1880 1881 /// CheckImplementationIvars - This routine checks if the instance variables 1882 /// listed in the implelementation match those listed in the interface. 1883 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1884 ObjCIvarDecl **Fields, unsigned nIvars, 1885 SourceLocation Loc); 1886 1887 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1888 /// remains unimplemented in the class or category @implementation. 1889 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1890 ObjCContainerDecl* IDecl, 1891 bool IncompleteImpl = false); 1892 1893 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1894 /// which must be implemented by this implementation. 1895 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1896 ObjCContainerDecl *CDecl, 1897 const SelectorSet &InsMap); 1898 1899 /// DefaultSynthesizeProperties - This routine default synthesizes all 1900 /// properties which must be synthesized in class's @implementation. 1901 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1902 ObjCInterfaceDecl *IDecl); 1903 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1904 1905 /// CollectImmediateProperties - This routine collects all properties in 1906 /// the class and its conforming protocols; but not those it its super class. 1907 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1908 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1909 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1910 1911 1912 /// LookupPropertyDecl - Looks up a property in the current class and all 1913 /// its protocols. 1914 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1915 IdentifierInfo *II); 1916 1917 /// Called by ActOnProperty to handle @property declarations in 1918 //// class extensions. 1919 Decl *HandlePropertyInClassExtension(Scope *S, 1920 SourceLocation AtLoc, 1921 FieldDeclarator &FD, 1922 Selector GetterSel, 1923 Selector SetterSel, 1924 const bool isAssign, 1925 const bool isReadWrite, 1926 const unsigned Attributes, 1927 bool *isOverridingProperty, 1928 TypeSourceInfo *T, 1929 tok::ObjCKeywordKind MethodImplKind); 1930 1931 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1932 /// handle creating the ObjcPropertyDecl for a category or @interface. 1933 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1934 ObjCContainerDecl *CDecl, 1935 SourceLocation AtLoc, 1936 FieldDeclarator &FD, 1937 Selector GetterSel, 1938 Selector SetterSel, 1939 const bool isAssign, 1940 const bool isReadWrite, 1941 const unsigned Attributes, 1942 TypeSourceInfo *T, 1943 tok::ObjCKeywordKind MethodImplKind, 1944 DeclContext *lexicalDC = 0); 1945 1946 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1947 /// warning) when atomic property has one but not the other user-declared 1948 /// setter or getter. 1949 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1950 ObjCContainerDecl* IDecl); 1951 1952 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1953 1954 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1955 1956 enum MethodMatchStrategy { 1957 MMS_loose, 1958 MMS_strict 1959 }; 1960 1961 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1962 /// true, or false, accordingly. 1963 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1964 const ObjCMethodDecl *PrevMethod, 1965 MethodMatchStrategy strategy = MMS_strict); 1966 1967 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1968 /// or protocol against those declared in their implementations. 1969 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1970 const SelectorSet &ClsMap, 1971 SelectorSet &InsMapSeen, 1972 SelectorSet &ClsMapSeen, 1973 ObjCImplDecl* IMPDecl, 1974 ObjCContainerDecl* IDecl, 1975 bool &IncompleteImpl, 1976 bool ImmediateClass, 1977 bool WarnExactMatch=false); 1978 1979 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1980 /// category matches with those implemented in its primary class and 1981 /// warns each time an exact match is found. 1982 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1983 1984private: 1985 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1986 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1987 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1988 1989 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1990 /// optionally warns if there are multiple signatures. 1991 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1992 bool receiverIdOrClass, 1993 bool warn, bool instance); 1994 1995public: 1996 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1997 /// unit are added to a global pool. This allows us to efficiently associate 1998 /// a selector with a method declaraation for purposes of typechecking 1999 /// messages sent to "id" (where the class of the object is unknown). 2000 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2001 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2002 } 2003 2004 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2005 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2006 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2007 } 2008 2009 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2010 /// pool. 2011 void AddAnyMethodToGlobalPool(Decl *D); 2012 2013 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2014 /// there are multiple signatures. 2015 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2016 bool receiverIdOrClass=false, 2017 bool warn=true) { 2018 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2019 warn, /*instance*/true); 2020 } 2021 2022 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2023 /// there are multiple signatures. 2024 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2025 bool receiverIdOrClass=false, 2026 bool warn=true) { 2027 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2028 warn, /*instance*/false); 2029 } 2030 2031 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2032 /// implementation. 2033 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2034 2035 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2036 /// initialization. 2037 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2038 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2039 2040 //===--------------------------------------------------------------------===// 2041 // Statement Parsing Callbacks: SemaStmt.cpp. 2042public: 2043 class FullExprArg { 2044 public: 2045 FullExprArg(Sema &actions) : E(0) { } 2046 2047 // FIXME: The const_cast here is ugly. RValue references would make this 2048 // much nicer (or we could duplicate a bunch of the move semantics 2049 // emulation code from Ownership.h). 2050 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2051 2052 ExprResult release() { 2053 return move(E); 2054 } 2055 2056 Expr *get() const { return E; } 2057 2058 Expr *operator->() { 2059 return E; 2060 } 2061 2062 private: 2063 // FIXME: No need to make the entire Sema class a friend when it's just 2064 // Sema::MakeFullExpr that needs access to the constructor below. 2065 friend class Sema; 2066 2067 explicit FullExprArg(Expr *expr) : E(expr) {} 2068 2069 Expr *E; 2070 }; 2071 2072 FullExprArg MakeFullExpr(Expr *Arg) { 2073 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2074 } 2075 2076 StmtResult ActOnExprStmt(FullExprArg Expr); 2077 2078 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2079 bool HasLeadingEmptyMacro = false); 2080 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2081 MultiStmtArg Elts, 2082 bool isStmtExpr); 2083 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2084 SourceLocation StartLoc, 2085 SourceLocation EndLoc); 2086 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2087 StmtResult ActOnForEachLValueExpr(Expr *E); 2088 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2089 SourceLocation DotDotDotLoc, Expr *RHSVal, 2090 SourceLocation ColonLoc); 2091 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2092 2093 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2094 SourceLocation ColonLoc, 2095 Stmt *SubStmt, Scope *CurScope); 2096 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2097 SourceLocation ColonLoc, Stmt *SubStmt); 2098 2099 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2100 FullExprArg CondVal, Decl *CondVar, 2101 Stmt *ThenVal, 2102 SourceLocation ElseLoc, Stmt *ElseVal); 2103 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2104 Expr *Cond, 2105 Decl *CondVar); 2106 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2107 Stmt *Switch, Stmt *Body); 2108 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2109 FullExprArg Cond, 2110 Decl *CondVar, Stmt *Body); 2111 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2112 SourceLocation WhileLoc, 2113 SourceLocation CondLParen, Expr *Cond, 2114 SourceLocation CondRParen); 2115 2116 StmtResult ActOnForStmt(SourceLocation ForLoc, 2117 SourceLocation LParenLoc, 2118 Stmt *First, FullExprArg Second, 2119 Decl *SecondVar, 2120 FullExprArg Third, 2121 SourceLocation RParenLoc, 2122 Stmt *Body); 2123 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2124 Expr *collection); 2125 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2126 SourceLocation LParenLoc, 2127 Stmt *First, Expr *Second, 2128 SourceLocation RParenLoc, Stmt *Body); 2129 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2130 SourceLocation LParenLoc, Stmt *LoopVar, 2131 SourceLocation ColonLoc, Expr *Collection, 2132 SourceLocation RParenLoc); 2133 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2134 SourceLocation ColonLoc, 2135 Stmt *RangeDecl, Stmt *BeginEndDecl, 2136 Expr *Cond, Expr *Inc, 2137 Stmt *LoopVarDecl, 2138 SourceLocation RParenLoc); 2139 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2140 2141 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2142 SourceLocation LabelLoc, 2143 LabelDecl *TheDecl); 2144 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2145 SourceLocation StarLoc, 2146 Expr *DestExp); 2147 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2148 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2149 2150 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2151 bool AllowFunctionParameters); 2152 2153 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2154 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2155 2156 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2157 bool IsSimple, bool IsVolatile, 2158 unsigned NumOutputs, unsigned NumInputs, 2159 IdentifierInfo **Names, 2160 MultiExprArg Constraints, 2161 MultiExprArg Exprs, 2162 Expr *AsmString, 2163 MultiExprArg Clobbers, 2164 SourceLocation RParenLoc, 2165 bool MSAsm = false); 2166 2167 2168 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2169 SourceLocation StartLoc, 2170 SourceLocation IdLoc, IdentifierInfo *Id, 2171 bool Invalid = false); 2172 2173 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2174 2175 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2176 Decl *Parm, Stmt *Body); 2177 2178 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2179 2180 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2181 MultiStmtArg Catch, Stmt *Finally); 2182 2183 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2184 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2185 Scope *CurScope); 2186 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2187 Expr *operand); 2188 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2189 Expr *SynchExpr, 2190 Stmt *SynchBody); 2191 2192 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2193 2194 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2195 SourceLocation StartLoc, 2196 SourceLocation IdLoc, 2197 IdentifierInfo *Id); 2198 2199 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2200 2201 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2202 Decl *ExDecl, Stmt *HandlerBlock); 2203 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2204 MultiStmtArg Handlers); 2205 2206 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2207 SourceLocation TryLoc, 2208 Stmt *TryBlock, 2209 Stmt *Handler); 2210 2211 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2212 Expr *FilterExpr, 2213 Stmt *Block); 2214 2215 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2216 Stmt *Block); 2217 2218 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2219 2220 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2221 2222 /// \brief If it's a file scoped decl that must warn if not used, keep track 2223 /// of it. 2224 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2225 2226 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2227 /// whose result is unused, warn. 2228 void DiagnoseUnusedExprResult(const Stmt *S); 2229 void DiagnoseUnusedDecl(const NamedDecl *ND); 2230 2231 ParsingDeclState PushParsingDeclaration() { 2232 return DelayedDiagnostics.pushParsingDecl(); 2233 } 2234 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2235 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2236 } 2237 2238 typedef ProcessingContextState ParsingClassState; 2239 ParsingClassState PushParsingClass() { 2240 return DelayedDiagnostics.pushContext(); 2241 } 2242 void PopParsingClass(ParsingClassState state) { 2243 DelayedDiagnostics.popContext(state); 2244 } 2245 2246 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2247 SourceLocation Loc, 2248 const ObjCInterfaceDecl *UnknownObjCClass=0); 2249 2250 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2251 2252 bool makeUnavailableInSystemHeader(SourceLocation loc, 2253 StringRef message); 2254 2255 //===--------------------------------------------------------------------===// 2256 // Expression Parsing Callbacks: SemaExpr.cpp. 2257 2258 bool CanUseDecl(NamedDecl *D); 2259 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2260 const ObjCInterfaceDecl *UnknownObjCClass=0); 2261 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2262 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2263 ObjCMethodDecl *Getter, 2264 SourceLocation Loc); 2265 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2266 Expr **Args, unsigned NumArgs); 2267 2268 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2269 2270 void PopExpressionEvaluationContext(); 2271 2272 void DiscardCleanupsInEvaluationContext(); 2273 2274 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2275 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2276 void MarkDeclarationsReferencedInExpr(Expr *E); 2277 2278 /// \brief Try to recover by turning the given expression into a 2279 /// call. Returns true if recovery was attempted or an error was 2280 /// emitted; this may also leave the ExprResult invalid. 2281 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2282 bool ForceComplain = false, 2283 bool (*IsPlausibleResult)(QualType) = 0); 2284 2285 /// \brief Figure out if an expression could be turned into a call. 2286 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2287 UnresolvedSetImpl &NonTemplateOverloads); 2288 2289 /// \brief Conditionally issue a diagnostic based on the current 2290 /// evaluation context. 2291 /// 2292 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2293 /// the function body is parsed, and then do a basic reachability analysis to 2294 /// determine if the statement is reachable. If it is unreachable, the 2295 /// diagnostic will not be emitted. 2296 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2297 const PartialDiagnostic &PD); 2298 2299 // Primary Expressions. 2300 SourceRange getExprRange(Expr *E) const; 2301 2302 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2303 bool HasTrailingLParen, bool IsAddressOfOperand); 2304 2305 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2306 TemplateArgumentListInfo &Buffer, 2307 DeclarationNameInfo &NameInfo, 2308 const TemplateArgumentListInfo *&TemplateArgs); 2309 2310 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2311 CorrectTypoContext CTC = CTC_Unknown, 2312 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2313 Expr **Args = 0, unsigned NumArgs = 0); 2314 2315 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2316 IdentifierInfo *II, 2317 bool AllowBuiltinCreation=false); 2318 2319 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2320 const DeclarationNameInfo &NameInfo, 2321 bool isAddressOfOperand, 2322 const TemplateArgumentListInfo *TemplateArgs); 2323 2324 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2325 ExprValueKind VK, 2326 SourceLocation Loc, 2327 const CXXScopeSpec *SS = 0); 2328 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2329 ExprValueKind VK, 2330 const DeclarationNameInfo &NameInfo, 2331 const CXXScopeSpec *SS = 0); 2332 ExprResult 2333 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2334 SourceLocation nameLoc, 2335 IndirectFieldDecl *indirectField, 2336 Expr *baseObjectExpr = 0, 2337 SourceLocation opLoc = SourceLocation()); 2338 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2339 LookupResult &R, 2340 const TemplateArgumentListInfo *TemplateArgs); 2341 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2342 LookupResult &R, 2343 const TemplateArgumentListInfo *TemplateArgs, 2344 bool IsDefiniteInstance); 2345 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2346 const LookupResult &R, 2347 bool HasTrailingLParen); 2348 2349 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2350 const DeclarationNameInfo &NameInfo); 2351 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2352 const DeclarationNameInfo &NameInfo, 2353 const TemplateArgumentListInfo *TemplateArgs); 2354 2355 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2356 LookupResult &R, 2357 bool NeedsADL); 2358 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2359 const DeclarationNameInfo &NameInfo, 2360 NamedDecl *D); 2361 2362 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2363 ExprResult ActOnNumericConstant(const Token &Tok); 2364 ExprResult ActOnCharacterConstant(const Token &Tok); 2365 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2366 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2367 SourceLocation R, 2368 MultiExprArg Val); 2369 2370 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2371 /// fragments (e.g. "foo" "bar" L"baz"). 2372 ExprResult ActOnStringLiteral(const Token *StringToks, 2373 unsigned NumStringToks); 2374 2375 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2376 SourceLocation DefaultLoc, 2377 SourceLocation RParenLoc, 2378 Expr *ControllingExpr, 2379 MultiTypeArg ArgTypes, 2380 MultiExprArg ArgExprs); 2381 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2382 SourceLocation DefaultLoc, 2383 SourceLocation RParenLoc, 2384 Expr *ControllingExpr, 2385 TypeSourceInfo **Types, 2386 Expr **Exprs, 2387 unsigned NumAssocs); 2388 2389 // Binary/Unary Operators. 'Tok' is the token for the operator. 2390 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2391 Expr *InputExpr); 2392 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2393 UnaryOperatorKind Opc, Expr *Input); 2394 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2395 tok::TokenKind Op, Expr *Input); 2396 2397 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2398 SourceLocation OpLoc, 2399 UnaryExprOrTypeTrait ExprKind, 2400 SourceRange R); 2401 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2402 UnaryExprOrTypeTrait ExprKind); 2403 ExprResult 2404 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2405 UnaryExprOrTypeTrait ExprKind, 2406 bool IsType, void *TyOrEx, 2407 const SourceRange &ArgRange); 2408 2409 ExprResult CheckPlaceholderExpr(Expr *E); 2410 bool CheckVecStepExpr(Expr *E); 2411 2412 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2413 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2414 SourceRange ExprRange, 2415 UnaryExprOrTypeTrait ExprKind); 2416 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2417 SourceLocation OpLoc, 2418 IdentifierInfo &Name, 2419 SourceLocation NameLoc, 2420 SourceLocation RParenLoc); 2421 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2422 tok::TokenKind Kind, Expr *Input); 2423 2424 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2425 Expr *Idx, SourceLocation RLoc); 2426 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2427 Expr *Idx, SourceLocation RLoc); 2428 2429 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2430 SourceLocation OpLoc, bool IsArrow, 2431 CXXScopeSpec &SS, 2432 NamedDecl *FirstQualifierInScope, 2433 const DeclarationNameInfo &NameInfo, 2434 const TemplateArgumentListInfo *TemplateArgs); 2435 2436 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2437 SourceLocation OpLoc, bool IsArrow, 2438 const CXXScopeSpec &SS, 2439 NamedDecl *FirstQualifierInScope, 2440 LookupResult &R, 2441 const TemplateArgumentListInfo *TemplateArgs, 2442 bool SuppressQualifierCheck = false); 2443 2444 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2445 bool &IsArrow, SourceLocation OpLoc, 2446 CXXScopeSpec &SS, 2447 Decl *ObjCImpDecl, 2448 bool HasTemplateArgs); 2449 2450 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2451 const CXXScopeSpec &SS, 2452 const LookupResult &R); 2453 2454 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2455 bool IsArrow, SourceLocation OpLoc, 2456 const CXXScopeSpec &SS, 2457 NamedDecl *FirstQualifierInScope, 2458 const DeclarationNameInfo &NameInfo, 2459 const TemplateArgumentListInfo *TemplateArgs); 2460 2461 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2462 SourceLocation OpLoc, 2463 tok::TokenKind OpKind, 2464 CXXScopeSpec &SS, 2465 UnqualifiedId &Member, 2466 Decl *ObjCImpDecl, 2467 bool HasTrailingLParen); 2468 2469 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2470 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2471 FunctionDecl *FDecl, 2472 const FunctionProtoType *Proto, 2473 Expr **Args, unsigned NumArgs, 2474 SourceLocation RParenLoc, 2475 bool ExecConfig = false); 2476 2477 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2478 /// This provides the location of the left/right parens and a list of comma 2479 /// locations. 2480 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2481 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2482 Expr *ExecConfig = 0, bool IsExecConfig = false); 2483 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2484 SourceLocation LParenLoc, 2485 Expr **Args, unsigned NumArgs, 2486 SourceLocation RParenLoc, 2487 Expr *Config = 0, 2488 bool IsExecConfig = false); 2489 2490 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2491 MultiExprArg ExecConfig, 2492 SourceLocation GGGLoc); 2493 2494 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2495 Declarator &D, ParsedType &Ty, 2496 SourceLocation RParenLoc, Expr *CastExpr); 2497 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2498 TypeSourceInfo *Ty, 2499 SourceLocation RParenLoc, 2500 Expr *Op); 2501 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2502 2503 /// \brief Build an altivec or OpenCL literal. 2504 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2505 SourceLocation RParenLoc, Expr *E, 2506 TypeSourceInfo *TInfo); 2507 2508 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2509 2510 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2511 ParsedType Ty, 2512 SourceLocation RParenLoc, 2513 Expr *InitExpr); 2514 2515 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2516 TypeSourceInfo *TInfo, 2517 SourceLocation RParenLoc, 2518 Expr *LiteralExpr); 2519 2520 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2521 MultiExprArg InitArgList, 2522 SourceLocation RBraceLoc); 2523 2524 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2525 SourceLocation Loc, 2526 bool GNUSyntax, 2527 ExprResult Init); 2528 2529 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2530 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2531 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2532 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2533 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2534 Expr *LHSExpr, Expr *RHSExpr); 2535 2536 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2537 /// in the case of a the GNU conditional expr extension. 2538 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2539 SourceLocation ColonLoc, 2540 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2541 2542 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2543 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2544 LabelDecl *TheDecl); 2545 2546 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2547 SourceLocation RPLoc); // "({..})" 2548 2549 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2550 struct OffsetOfComponent { 2551 SourceLocation LocStart, LocEnd; 2552 bool isBrackets; // true if [expr], false if .ident 2553 union { 2554 IdentifierInfo *IdentInfo; 2555 Expr *E; 2556 } U; 2557 }; 2558 2559 /// __builtin_offsetof(type, a.b[123][456].c) 2560 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2561 TypeSourceInfo *TInfo, 2562 OffsetOfComponent *CompPtr, 2563 unsigned NumComponents, 2564 SourceLocation RParenLoc); 2565 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2566 SourceLocation BuiltinLoc, 2567 SourceLocation TypeLoc, 2568 ParsedType ParsedArgTy, 2569 OffsetOfComponent *CompPtr, 2570 unsigned NumComponents, 2571 SourceLocation RParenLoc); 2572 2573 // __builtin_choose_expr(constExpr, expr1, expr2) 2574 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2575 Expr *CondExpr, Expr *LHSExpr, 2576 Expr *RHSExpr, SourceLocation RPLoc); 2577 2578 // __builtin_va_arg(expr, type) 2579 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2580 SourceLocation RPLoc); 2581 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2582 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2583 2584 // __null 2585 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2586 2587 bool CheckCaseExpression(Expr *E); 2588 2589 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2590 2591 //===------------------------- "Block" Extension ------------------------===// 2592 2593 /// ActOnBlockStart - This callback is invoked when a block literal is 2594 /// started. 2595 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2596 2597 /// ActOnBlockArguments - This callback allows processing of block arguments. 2598 /// If there are no arguments, this is still invoked. 2599 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2600 2601 /// ActOnBlockError - If there is an error parsing a block, this callback 2602 /// is invoked to pop the information about the block from the action impl. 2603 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2604 2605 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2606 /// literal was successfully completed. ^(int x){...} 2607 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2608 Scope *CurScope); 2609 2610 //===---------------------------- OpenCL Features -----------------------===// 2611 2612 /// __builtin_astype(...) 2613 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2614 SourceLocation BuiltinLoc, 2615 SourceLocation RParenLoc); 2616 2617 //===---------------------------- C++ Features --------------------------===// 2618 2619 // Act on C++ namespaces 2620 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2621 SourceLocation NamespaceLoc, 2622 SourceLocation IdentLoc, 2623 IdentifierInfo *Ident, 2624 SourceLocation LBrace, 2625 AttributeList *AttrList); 2626 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2627 2628 NamespaceDecl *getStdNamespace() const; 2629 NamespaceDecl *getOrCreateStdNamespace(); 2630 2631 CXXRecordDecl *getStdBadAlloc() const; 2632 2633 Decl *ActOnUsingDirective(Scope *CurScope, 2634 SourceLocation UsingLoc, 2635 SourceLocation NamespcLoc, 2636 CXXScopeSpec &SS, 2637 SourceLocation IdentLoc, 2638 IdentifierInfo *NamespcName, 2639 AttributeList *AttrList); 2640 2641 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2642 2643 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2644 SourceLocation NamespaceLoc, 2645 SourceLocation AliasLoc, 2646 IdentifierInfo *Alias, 2647 CXXScopeSpec &SS, 2648 SourceLocation IdentLoc, 2649 IdentifierInfo *Ident); 2650 2651 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2652 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2653 const LookupResult &PreviousDecls); 2654 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2655 NamedDecl *Target); 2656 2657 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2658 bool isTypeName, 2659 const CXXScopeSpec &SS, 2660 SourceLocation NameLoc, 2661 const LookupResult &Previous); 2662 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2663 const CXXScopeSpec &SS, 2664 SourceLocation NameLoc); 2665 2666 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2667 SourceLocation UsingLoc, 2668 CXXScopeSpec &SS, 2669 const DeclarationNameInfo &NameInfo, 2670 AttributeList *AttrList, 2671 bool IsInstantiation, 2672 bool IsTypeName, 2673 SourceLocation TypenameLoc); 2674 2675 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2676 2677 Decl *ActOnUsingDeclaration(Scope *CurScope, 2678 AccessSpecifier AS, 2679 bool HasUsingKeyword, 2680 SourceLocation UsingLoc, 2681 CXXScopeSpec &SS, 2682 UnqualifiedId &Name, 2683 AttributeList *AttrList, 2684 bool IsTypeName, 2685 SourceLocation TypenameLoc); 2686 Decl *ActOnAliasDeclaration(Scope *CurScope, 2687 AccessSpecifier AS, 2688 MultiTemplateParamsArg TemplateParams, 2689 SourceLocation UsingLoc, 2690 UnqualifiedId &Name, 2691 TypeResult Type); 2692 2693 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2694 /// ActOnDeclarator, when a C++ direct initializer is present. 2695 /// e.g: "int x(1);" 2696 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2697 SourceLocation LParenLoc, 2698 MultiExprArg Exprs, 2699 SourceLocation RParenLoc, 2700 bool TypeMayContainAuto); 2701 2702 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2703 /// and sets it as the initializer for the the passed in VarDecl. 2704 bool InitializeVarWithConstructor(VarDecl *VD, 2705 CXXConstructorDecl *Constructor, 2706 MultiExprArg Exprs, 2707 bool HadMultipleCandidates); 2708 2709 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2710 /// including handling of its default argument expressions. 2711 /// 2712 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2713 ExprResult 2714 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2715 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2716 bool HadMultipleCandidates, bool RequiresZeroInit, 2717 unsigned ConstructKind, SourceRange ParenRange); 2718 2719 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2720 // the constructor can be elidable? 2721 ExprResult 2722 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2723 CXXConstructorDecl *Constructor, bool Elidable, 2724 MultiExprArg Exprs, bool HadMultipleCandidates, 2725 bool RequiresZeroInit, unsigned ConstructKind, 2726 SourceRange ParenRange); 2727 2728 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2729 /// the default expr if needed. 2730 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2731 FunctionDecl *FD, 2732 ParmVarDecl *Param); 2733 2734 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2735 /// constructed variable. 2736 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2737 2738 /// \brief Helper class that collects exception specifications for 2739 /// implicitly-declared special member functions. 2740 class ImplicitExceptionSpecification { 2741 // Pointer to allow copying 2742 ASTContext *Context; 2743 // We order exception specifications thus: 2744 // noexcept is the most restrictive, but is only used in C++0x. 2745 // throw() comes next. 2746 // Then a throw(collected exceptions) 2747 // Finally no specification. 2748 // throw(...) is used instead if any called function uses it. 2749 // 2750 // If this exception specification cannot be known yet (for instance, 2751 // because this is the exception specification for a defaulted default 2752 // constructor and we haven't finished parsing the deferred parts of the 2753 // class yet), the C++0x standard does not specify how to behave. We 2754 // record this as an 'unknown' exception specification, which overrules 2755 // any other specification (even 'none', to keep this rule simple). 2756 ExceptionSpecificationType ComputedEST; 2757 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2758 SmallVector<QualType, 4> Exceptions; 2759 2760 void ClearExceptions() { 2761 ExceptionsSeen.clear(); 2762 Exceptions.clear(); 2763 } 2764 2765 public: 2766 explicit ImplicitExceptionSpecification(ASTContext &Context) 2767 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2768 if (!Context.getLangOptions().CPlusPlus0x) 2769 ComputedEST = EST_DynamicNone; 2770 } 2771 2772 /// \brief Get the computed exception specification type. 2773 ExceptionSpecificationType getExceptionSpecType() const { 2774 assert(ComputedEST != EST_ComputedNoexcept && 2775 "noexcept(expr) should not be a possible result"); 2776 return ComputedEST; 2777 } 2778 2779 /// \brief The number of exceptions in the exception specification. 2780 unsigned size() const { return Exceptions.size(); } 2781 2782 /// \brief The set of exceptions in the exception specification. 2783 const QualType *data() const { return Exceptions.data(); } 2784 2785 /// \brief Integrate another called method into the collected data. 2786 void CalledDecl(CXXMethodDecl *Method); 2787 2788 /// \brief Integrate an invoked expression into the collected data. 2789 void CalledExpr(Expr *E); 2790 2791 /// \brief Specify that the exception specification can't be detemined yet. 2792 void SetDelayed() { 2793 ClearExceptions(); 2794 ComputedEST = EST_Delayed; 2795 } 2796 2797 FunctionProtoType::ExtProtoInfo getEPI() const { 2798 FunctionProtoType::ExtProtoInfo EPI; 2799 EPI.ExceptionSpecType = getExceptionSpecType(); 2800 EPI.NumExceptions = size(); 2801 EPI.Exceptions = data(); 2802 return EPI; 2803 } 2804 }; 2805 2806 /// \brief Determine what sort of exception specification a defaulted 2807 /// copy constructor of a class will have. 2808 ImplicitExceptionSpecification 2809 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2810 2811 /// \brief Determine what sort of exception specification a defaulted 2812 /// default constructor of a class will have, and whether the parameter 2813 /// will be const. 2814 std::pair<ImplicitExceptionSpecification, bool> 2815 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2816 2817 /// \brief Determine what sort of exception specification a defautled 2818 /// copy assignment operator of a class will have, and whether the 2819 /// parameter will be const. 2820 std::pair<ImplicitExceptionSpecification, bool> 2821 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2822 2823 /// \brief Determine what sort of exception specification a defaulted move 2824 /// constructor of a class will have. 2825 ImplicitExceptionSpecification 2826 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2827 2828 /// \brief Determine what sort of exception specification a defaulted move 2829 /// assignment operator of a class will have. 2830 ImplicitExceptionSpecification 2831 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2832 2833 /// \brief Determine what sort of exception specification a defaulted 2834 /// destructor of a class will have. 2835 ImplicitExceptionSpecification 2836 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2837 2838 /// \brief Determine if a special member function should have a deleted 2839 /// definition when it is defaulted. 2840 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2841 2842 /// \brief Determine if a defaulted copy assignment operator ought to be 2843 /// deleted. 2844 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2845 2846 /// \brief Determine if a defaulted move assignment operator ought to be 2847 /// deleted. 2848 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2849 2850 /// \brief Determine if a defaulted destructor ought to be deleted. 2851 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2852 2853 /// \brief Declare the implicit default constructor for the given class. 2854 /// 2855 /// \param ClassDecl The class declaration into which the implicit 2856 /// default constructor will be added. 2857 /// 2858 /// \returns The implicitly-declared default constructor. 2859 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2860 CXXRecordDecl *ClassDecl); 2861 2862 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2863 /// defining this constructor as the default constructor. 2864 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2865 CXXConstructorDecl *Constructor); 2866 2867 /// \brief Declare the implicit destructor for the given class. 2868 /// 2869 /// \param ClassDecl The class declaration into which the implicit 2870 /// destructor will be added. 2871 /// 2872 /// \returns The implicitly-declared destructor. 2873 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2874 2875 /// DefineImplicitDestructor - Checks for feasibility of 2876 /// defining this destructor as the default destructor. 2877 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2878 CXXDestructorDecl *Destructor); 2879 2880 /// \brief Build an exception spec for destructors that don't have one. 2881 /// 2882 /// C++11 says that user-defined destructors with no exception spec get one 2883 /// that looks as if the destructor was implicitly declared. 2884 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2885 CXXDestructorDecl *Destructor); 2886 2887 /// \brief Declare all inherited constructors for the given class. 2888 /// 2889 /// \param ClassDecl The class declaration into which the inherited 2890 /// constructors will be added. 2891 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2892 2893 /// \brief Declare the implicit copy constructor for the given class. 2894 /// 2895 /// \param ClassDecl The class declaration into which the implicit 2896 /// copy constructor will be added. 2897 /// 2898 /// \returns The implicitly-declared copy constructor. 2899 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2900 2901 /// DefineImplicitCopyConstructor - Checks for feasibility of 2902 /// defining this constructor as the copy constructor. 2903 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2904 CXXConstructorDecl *Constructor); 2905 2906 /// \brief Declare the implicit move constructor for the given class. 2907 /// 2908 /// \param ClassDecl The Class declaration into which the implicit 2909 /// move constructor will be added. 2910 /// 2911 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2912 /// declared. 2913 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2914 2915 /// DefineImplicitMoveConstructor - Checks for feasibility of 2916 /// defining this constructor as the move constructor. 2917 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2918 CXXConstructorDecl *Constructor); 2919 2920 /// \brief Declare the implicit copy assignment operator for the given class. 2921 /// 2922 /// \param ClassDecl The class declaration into which the implicit 2923 /// copy assignment operator will be added. 2924 /// 2925 /// \returns The implicitly-declared copy assignment operator. 2926 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2927 2928 /// \brief Defines an implicitly-declared copy assignment operator. 2929 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2930 CXXMethodDecl *MethodDecl); 2931 2932 /// \brief Declare the implicit move assignment operator for the given class. 2933 /// 2934 /// \param ClassDecl The Class declaration into which the implicit 2935 /// move assignment operator will be added. 2936 /// 2937 /// \returns The implicitly-declared move assignment operator, or NULL if it 2938 /// wasn't declared. 2939 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2940 2941 /// \brief Defines an implicitly-declared move assignment operator. 2942 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2943 CXXMethodDecl *MethodDecl); 2944 2945 /// \brief Force the declaration of any implicitly-declared members of this 2946 /// class. 2947 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2948 2949 /// MaybeBindToTemporary - If the passed in expression has a record type with 2950 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2951 /// it simply returns the passed in expression. 2952 ExprResult MaybeBindToTemporary(Expr *E); 2953 2954 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2955 MultiExprArg ArgsPtr, 2956 SourceLocation Loc, 2957 ASTOwningVector<Expr*> &ConvertedArgs); 2958 2959 ParsedType getDestructorName(SourceLocation TildeLoc, 2960 IdentifierInfo &II, SourceLocation NameLoc, 2961 Scope *S, CXXScopeSpec &SS, 2962 ParsedType ObjectType, 2963 bool EnteringContext); 2964 2965 // Checks that reinterpret casts don't have undefined behavior. 2966 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2967 bool IsDereference, SourceRange Range); 2968 2969 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2970 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2971 tok::TokenKind Kind, 2972 SourceLocation LAngleBracketLoc, 2973 Declarator &D, 2974 SourceLocation RAngleBracketLoc, 2975 SourceLocation LParenLoc, 2976 Expr *E, 2977 SourceLocation RParenLoc); 2978 2979 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2980 tok::TokenKind Kind, 2981 TypeSourceInfo *Ty, 2982 Expr *E, 2983 SourceRange AngleBrackets, 2984 SourceRange Parens); 2985 2986 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2987 SourceLocation TypeidLoc, 2988 TypeSourceInfo *Operand, 2989 SourceLocation RParenLoc); 2990 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2991 SourceLocation TypeidLoc, 2992 Expr *Operand, 2993 SourceLocation RParenLoc); 2994 2995 /// ActOnCXXTypeid - Parse typeid( something ). 2996 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2997 SourceLocation LParenLoc, bool isType, 2998 void *TyOrExpr, 2999 SourceLocation RParenLoc); 3000 3001 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3002 SourceLocation TypeidLoc, 3003 TypeSourceInfo *Operand, 3004 SourceLocation RParenLoc); 3005 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3006 SourceLocation TypeidLoc, 3007 Expr *Operand, 3008 SourceLocation RParenLoc); 3009 3010 /// ActOnCXXUuidof - Parse __uuidof( something ). 3011 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3012 SourceLocation LParenLoc, bool isType, 3013 void *TyOrExpr, 3014 SourceLocation RParenLoc); 3015 3016 3017 //// ActOnCXXThis - Parse 'this' pointer. 3018 ExprResult ActOnCXXThis(SourceLocation loc); 3019 3020 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 3021 /// the type of the 'this' pointer, or a null type if this is not possible. 3022 QualType getAndCaptureCurrentThisType(); 3023 3024 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3025 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3026 3027 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3028 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3029 3030 //// ActOnCXXThrow - Parse throw expressions. 3031 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3032 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3033 bool IsThrownVarInScope); 3034 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3035 bool IsThrownVarInScope); 3036 3037 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3038 /// Can be interpreted either as function-style casting ("int(x)") 3039 /// or class type construction ("ClassType(x,y,z)") 3040 /// or creation of a value-initialized type ("int()"). 3041 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3042 SourceLocation LParenLoc, 3043 MultiExprArg Exprs, 3044 SourceLocation RParenLoc); 3045 3046 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3047 SourceLocation LParenLoc, 3048 MultiExprArg Exprs, 3049 SourceLocation RParenLoc); 3050 3051 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3052 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3053 SourceLocation PlacementLParen, 3054 MultiExprArg PlacementArgs, 3055 SourceLocation PlacementRParen, 3056 SourceRange TypeIdParens, Declarator &D, 3057 SourceLocation ConstructorLParen, 3058 MultiExprArg ConstructorArgs, 3059 SourceLocation ConstructorRParen); 3060 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3061 SourceLocation PlacementLParen, 3062 MultiExprArg PlacementArgs, 3063 SourceLocation PlacementRParen, 3064 SourceRange TypeIdParens, 3065 QualType AllocType, 3066 TypeSourceInfo *AllocTypeInfo, 3067 Expr *ArraySize, 3068 SourceLocation ConstructorLParen, 3069 MultiExprArg ConstructorArgs, 3070 SourceLocation ConstructorRParen, 3071 bool TypeMayContainAuto = true); 3072 3073 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3074 SourceRange R); 3075 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3076 bool UseGlobal, QualType AllocType, bool IsArray, 3077 Expr **PlaceArgs, unsigned NumPlaceArgs, 3078 FunctionDecl *&OperatorNew, 3079 FunctionDecl *&OperatorDelete); 3080 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3081 DeclarationName Name, Expr** Args, 3082 unsigned NumArgs, DeclContext *Ctx, 3083 bool AllowMissing, FunctionDecl *&Operator, 3084 bool Diagnose = true); 3085 void DeclareGlobalNewDelete(); 3086 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3087 QualType Argument, 3088 bool addMallocAttr = false); 3089 3090 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3091 DeclarationName Name, FunctionDecl* &Operator, 3092 bool Diagnose = true); 3093 3094 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3095 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3096 bool UseGlobal, bool ArrayForm, 3097 Expr *Operand); 3098 3099 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3100 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3101 SourceLocation StmtLoc, 3102 bool ConvertToBoolean); 3103 3104 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3105 Expr *Operand, SourceLocation RParen); 3106 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3107 SourceLocation RParen); 3108 3109 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3110 /// pseudo-functions. 3111 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3112 SourceLocation KWLoc, 3113 ParsedType Ty, 3114 SourceLocation RParen); 3115 3116 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3117 SourceLocation KWLoc, 3118 TypeSourceInfo *T, 3119 SourceLocation RParen); 3120 3121 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3122 /// pseudo-functions. 3123 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3124 SourceLocation KWLoc, 3125 ParsedType LhsTy, 3126 ParsedType RhsTy, 3127 SourceLocation RParen); 3128 3129 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3130 SourceLocation KWLoc, 3131 TypeSourceInfo *LhsT, 3132 TypeSourceInfo *RhsT, 3133 SourceLocation RParen); 3134 3135 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3136 /// pseudo-functions. 3137 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3138 SourceLocation KWLoc, 3139 ParsedType LhsTy, 3140 Expr *DimExpr, 3141 SourceLocation RParen); 3142 3143 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3144 SourceLocation KWLoc, 3145 TypeSourceInfo *TSInfo, 3146 Expr *DimExpr, 3147 SourceLocation RParen); 3148 3149 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3150 /// pseudo-functions. 3151 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3152 SourceLocation KWLoc, 3153 Expr *Queried, 3154 SourceLocation RParen); 3155 3156 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3157 SourceLocation KWLoc, 3158 Expr *Queried, 3159 SourceLocation RParen); 3160 3161 ExprResult ActOnStartCXXMemberReference(Scope *S, 3162 Expr *Base, 3163 SourceLocation OpLoc, 3164 tok::TokenKind OpKind, 3165 ParsedType &ObjectType, 3166 bool &MayBePseudoDestructor); 3167 3168 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3169 3170 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3171 SourceLocation OpLoc, 3172 tok::TokenKind OpKind, 3173 const CXXScopeSpec &SS, 3174 TypeSourceInfo *ScopeType, 3175 SourceLocation CCLoc, 3176 SourceLocation TildeLoc, 3177 PseudoDestructorTypeStorage DestroyedType, 3178 bool HasTrailingLParen); 3179 3180 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3181 SourceLocation OpLoc, 3182 tok::TokenKind OpKind, 3183 CXXScopeSpec &SS, 3184 UnqualifiedId &FirstTypeName, 3185 SourceLocation CCLoc, 3186 SourceLocation TildeLoc, 3187 UnqualifiedId &SecondTypeName, 3188 bool HasTrailingLParen); 3189 3190 /// MaybeCreateExprWithCleanups - If the current full-expression 3191 /// requires any cleanups, surround it with a ExprWithCleanups node. 3192 /// Otherwise, just returns the passed-in expression. 3193 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3194 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3195 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3196 3197 ExprResult ActOnFinishFullExpr(Expr *Expr); 3198 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3199 3200 // Marks SS invalid if it represents an incomplete type. 3201 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3202 3203 DeclContext *computeDeclContext(QualType T); 3204 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3205 bool EnteringContext = false); 3206 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3207 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3208 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3209 3210 /// \brief The parser has parsed a global nested-name-specifier '::'. 3211 /// 3212 /// \param S The scope in which this nested-name-specifier occurs. 3213 /// 3214 /// \param CCLoc The location of the '::'. 3215 /// 3216 /// \param SS The nested-name-specifier, which will be updated in-place 3217 /// to reflect the parsed nested-name-specifier. 3218 /// 3219 /// \returns true if an error occurred, false otherwise. 3220 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3221 CXXScopeSpec &SS); 3222 3223 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3224 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3225 3226 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3227 SourceLocation IdLoc, 3228 IdentifierInfo &II, 3229 ParsedType ObjectType); 3230 3231 bool BuildCXXNestedNameSpecifier(Scope *S, 3232 IdentifierInfo &Identifier, 3233 SourceLocation IdentifierLoc, 3234 SourceLocation CCLoc, 3235 QualType ObjectType, 3236 bool EnteringContext, 3237 CXXScopeSpec &SS, 3238 NamedDecl *ScopeLookupResult, 3239 bool ErrorRecoveryLookup); 3240 3241 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3242 /// 3243 /// \param S The scope in which this nested-name-specifier occurs. 3244 /// 3245 /// \param Identifier The identifier preceding the '::'. 3246 /// 3247 /// \param IdentifierLoc The location of the identifier. 3248 /// 3249 /// \param CCLoc The location of the '::'. 3250 /// 3251 /// \param ObjectType The type of the object, if we're parsing 3252 /// nested-name-specifier in a member access expression. 3253 /// 3254 /// \param EnteringContext Whether we're entering the context nominated by 3255 /// this nested-name-specifier. 3256 /// 3257 /// \param SS The nested-name-specifier, which is both an input 3258 /// parameter (the nested-name-specifier before this type) and an 3259 /// output parameter (containing the full nested-name-specifier, 3260 /// including this new type). 3261 /// 3262 /// \returns true if an error occurred, false otherwise. 3263 bool ActOnCXXNestedNameSpecifier(Scope *S, 3264 IdentifierInfo &Identifier, 3265 SourceLocation IdentifierLoc, 3266 SourceLocation CCLoc, 3267 ParsedType ObjectType, 3268 bool EnteringContext, 3269 CXXScopeSpec &SS); 3270 3271 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3272 IdentifierInfo &Identifier, 3273 SourceLocation IdentifierLoc, 3274 SourceLocation ColonLoc, 3275 ParsedType ObjectType, 3276 bool EnteringContext); 3277 3278 /// \brief The parser has parsed a nested-name-specifier 3279 /// 'template[opt] template-name < template-args >::'. 3280 /// 3281 /// \param S The scope in which this nested-name-specifier occurs. 3282 /// 3283 /// \param TemplateLoc The location of the 'template' keyword, if any. 3284 /// 3285 /// \param SS The nested-name-specifier, which is both an input 3286 /// parameter (the nested-name-specifier before this type) and an 3287 /// output parameter (containing the full nested-name-specifier, 3288 /// including this new type). 3289 /// 3290 /// \param TemplateLoc the location of the 'template' keyword, if any. 3291 /// \param TemplateName The template name. 3292 /// \param TemplateNameLoc The location of the template name. 3293 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3294 /// \param TemplateArgs The template arguments. 3295 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3296 /// \param CCLoc The location of the '::'. 3297 3298 /// \param EnteringContext Whether we're entering the context of the 3299 /// nested-name-specifier. 3300 /// 3301 /// 3302 /// \returns true if an error occurred, false otherwise. 3303 bool ActOnCXXNestedNameSpecifier(Scope *S, 3304 SourceLocation TemplateLoc, 3305 CXXScopeSpec &SS, 3306 TemplateTy Template, 3307 SourceLocation TemplateNameLoc, 3308 SourceLocation LAngleLoc, 3309 ASTTemplateArgsPtr TemplateArgs, 3310 SourceLocation RAngleLoc, 3311 SourceLocation CCLoc, 3312 bool EnteringContext); 3313 3314 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3315 /// that the parser can use later to reconstruct the given 3316 /// nested-name-specifier. 3317 /// 3318 /// \param SS A nested-name-specifier. 3319 /// 3320 /// \returns A pointer containing all of the information in the 3321 /// nested-name-specifier \p SS. 3322 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3323 3324 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3325 /// the nested-name-specifier structure. 3326 /// 3327 /// \param Annotation The annotation pointer, produced by 3328 /// \c SaveNestedNameSpecifierAnnotation(). 3329 /// 3330 /// \param AnnotationRange The source range corresponding to the annotation. 3331 /// 3332 /// \param SS The nested-name-specifier that will be updated with the contents 3333 /// of the annotation pointer. 3334 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3335 SourceRange AnnotationRange, 3336 CXXScopeSpec &SS); 3337 3338 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3339 3340 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3341 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3342 /// After this method is called, according to [C++ 3.4.3p3], names should be 3343 /// looked up in the declarator-id's scope, until the declarator is parsed and 3344 /// ActOnCXXExitDeclaratorScope is called. 3345 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3346 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3347 3348 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3349 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3350 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3351 /// Used to indicate that names should revert to being looked up in the 3352 /// defining scope. 3353 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3354 3355 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3356 /// initializer for the declaration 'Dcl'. 3357 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3358 /// static data member of class X, names should be looked up in the scope of 3359 /// class X. 3360 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3361 3362 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3363 /// initializer for the declaration 'Dcl'. 3364 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3365 3366 // ParseObjCStringLiteral - Parse Objective-C string literals. 3367 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3368 Expr **Strings, 3369 unsigned NumStrings); 3370 3371 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3372 TypeSourceInfo *EncodedTypeInfo, 3373 SourceLocation RParenLoc); 3374 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3375 CXXMethodDecl *Method, 3376 bool HadMultipleCandidates); 3377 3378 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3379 SourceLocation EncodeLoc, 3380 SourceLocation LParenLoc, 3381 ParsedType Ty, 3382 SourceLocation RParenLoc); 3383 3384 // ParseObjCSelectorExpression - Build selector expression for @selector 3385 ExprResult ParseObjCSelectorExpression(Selector Sel, 3386 SourceLocation AtLoc, 3387 SourceLocation SelLoc, 3388 SourceLocation LParenLoc, 3389 SourceLocation RParenLoc); 3390 3391 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3392 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3393 SourceLocation AtLoc, 3394 SourceLocation ProtoLoc, 3395 SourceLocation LParenLoc, 3396 SourceLocation RParenLoc); 3397 3398 //===--------------------------------------------------------------------===// 3399 // C++ Declarations 3400 // 3401 Decl *ActOnStartLinkageSpecification(Scope *S, 3402 SourceLocation ExternLoc, 3403 SourceLocation LangLoc, 3404 StringRef Lang, 3405 SourceLocation LBraceLoc); 3406 Decl *ActOnFinishLinkageSpecification(Scope *S, 3407 Decl *LinkageSpec, 3408 SourceLocation RBraceLoc); 3409 3410 3411 //===--------------------------------------------------------------------===// 3412 // C++ Classes 3413 // 3414 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3415 const CXXScopeSpec *SS = 0); 3416 3417 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3418 SourceLocation ASLoc, 3419 SourceLocation ColonLoc); 3420 3421 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3422 Declarator &D, 3423 MultiTemplateParamsArg TemplateParameterLists, 3424 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3425 bool HasDeferredInit); 3426 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3427 Expr *Init); 3428 3429 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3430 Scope *S, 3431 CXXScopeSpec &SS, 3432 IdentifierInfo *MemberOrBase, 3433 ParsedType TemplateTypeTy, 3434 SourceLocation IdLoc, 3435 SourceLocation LParenLoc, 3436 Expr **Args, unsigned NumArgs, 3437 SourceLocation RParenLoc, 3438 SourceLocation EllipsisLoc); 3439 3440 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3441 Scope *S, 3442 CXXScopeSpec &SS, 3443 IdentifierInfo *MemberOrBase, 3444 ParsedType TemplateTypeTy, 3445 SourceLocation IdLoc, 3446 Expr *InitList, 3447 SourceLocation EllipsisLoc); 3448 3449 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3450 Scope *S, 3451 CXXScopeSpec &SS, 3452 IdentifierInfo *MemberOrBase, 3453 ParsedType TemplateTypeTy, 3454 SourceLocation IdLoc, 3455 const MultiInitializer &Init, 3456 SourceLocation EllipsisLoc); 3457 3458 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3459 const MultiInitializer &Args, 3460 SourceLocation IdLoc); 3461 3462 MemInitResult BuildBaseInitializer(QualType BaseType, 3463 TypeSourceInfo *BaseTInfo, 3464 const MultiInitializer &Args, 3465 CXXRecordDecl *ClassDecl, 3466 SourceLocation EllipsisLoc); 3467 3468 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3469 const MultiInitializer &Args, 3470 SourceLocation BaseLoc, 3471 CXXRecordDecl *ClassDecl); 3472 3473 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3474 CXXCtorInitializer *Initializer); 3475 3476 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3477 CXXCtorInitializer **Initializers, 3478 unsigned NumInitializers, bool AnyErrors); 3479 3480 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3481 3482 3483 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3484 /// mark all the non-trivial destructors of its members and bases as 3485 /// referenced. 3486 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3487 CXXRecordDecl *Record); 3488 3489 /// \brief The list of classes whose vtables have been used within 3490 /// this translation unit, and the source locations at which the 3491 /// first use occurred. 3492 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3493 3494 /// \brief The list of vtables that are required but have not yet been 3495 /// materialized. 3496 SmallVector<VTableUse, 16> VTableUses; 3497 3498 /// \brief The set of classes whose vtables have been used within 3499 /// this translation unit, and a bit that will be true if the vtable is 3500 /// required to be emitted (otherwise, it should be emitted only if needed 3501 /// by code generation). 3502 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3503 3504 /// \brief Load any externally-stored vtable uses. 3505 void LoadExternalVTableUses(); 3506 3507 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3508 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3509 DynamicClassesType; 3510 3511 /// \brief A list of all of the dynamic classes in this translation 3512 /// unit. 3513 DynamicClassesType DynamicClasses; 3514 3515 /// \brief Note that the vtable for the given class was used at the 3516 /// given location. 3517 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3518 bool DefinitionRequired = false); 3519 3520 /// MarkVirtualMembersReferenced - Will mark all members of the given 3521 /// CXXRecordDecl referenced. 3522 void MarkVirtualMembersReferenced(SourceLocation Loc, 3523 const CXXRecordDecl *RD); 3524 3525 /// \brief Define all of the vtables that have been used in this 3526 /// translation unit and reference any virtual members used by those 3527 /// vtables. 3528 /// 3529 /// \returns true if any work was done, false otherwise. 3530 bool DefineUsedVTables(); 3531 3532 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3533 3534 void ActOnMemInitializers(Decl *ConstructorDecl, 3535 SourceLocation ColonLoc, 3536 CXXCtorInitializer **MemInits, 3537 unsigned NumMemInits, 3538 bool AnyErrors); 3539 3540 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3541 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3542 Decl *TagDecl, 3543 SourceLocation LBrac, 3544 SourceLocation RBrac, 3545 AttributeList *AttrList); 3546 3547 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3548 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3549 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3550 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3551 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3552 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3553 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3554 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3555 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3556 bool IsInsideALocalClassWithinATemplateFunction(); 3557 3558 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3559 Expr *AssertExpr, 3560 Expr *AssertMessageExpr, 3561 SourceLocation RParenLoc); 3562 3563 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3564 TypeSourceInfo *TSInfo); 3565 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3566 MultiTemplateParamsArg TemplateParams); 3567 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3568 MultiTemplateParamsArg TemplateParams); 3569 3570 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3571 StorageClass& SC); 3572 void CheckConstructor(CXXConstructorDecl *Constructor); 3573 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3574 StorageClass& SC); 3575 bool CheckDestructor(CXXDestructorDecl *Destructor); 3576 void CheckConversionDeclarator(Declarator &D, QualType &R, 3577 StorageClass& SC); 3578 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3579 3580 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3581 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3582 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3583 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3584 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3585 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3586 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3587 3588 //===--------------------------------------------------------------------===// 3589 // C++ Derived Classes 3590 // 3591 3592 /// ActOnBaseSpecifier - Parsed a base specifier 3593 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3594 SourceRange SpecifierRange, 3595 bool Virtual, AccessSpecifier Access, 3596 TypeSourceInfo *TInfo, 3597 SourceLocation EllipsisLoc); 3598 3599 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3600 SourceRange SpecifierRange, 3601 bool Virtual, AccessSpecifier Access, 3602 ParsedType basetype, 3603 SourceLocation BaseLoc, 3604 SourceLocation EllipsisLoc); 3605 3606 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3607 unsigned NumBases); 3608 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3609 unsigned NumBases); 3610 3611 bool IsDerivedFrom(QualType Derived, QualType Base); 3612 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3613 3614 // FIXME: I don't like this name. 3615 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3616 3617 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3618 3619 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3620 SourceLocation Loc, SourceRange Range, 3621 CXXCastPath *BasePath = 0, 3622 bool IgnoreAccess = false); 3623 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3624 unsigned InaccessibleBaseID, 3625 unsigned AmbigiousBaseConvID, 3626 SourceLocation Loc, SourceRange Range, 3627 DeclarationName Name, 3628 CXXCastPath *BasePath); 3629 3630 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3631 3632 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3633 /// covariant, according to C++ [class.virtual]p5. 3634 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3635 const CXXMethodDecl *Old); 3636 3637 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3638 /// spec is a subset of base spec. 3639 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3640 const CXXMethodDecl *Old); 3641 3642 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3643 3644 /// CheckOverrideControl - Check C++0x override control semantics. 3645 void CheckOverrideControl(const Decl *D); 3646 3647 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3648 /// overrides a virtual member function marked 'final', according to 3649 /// C++0x [class.virtual]p3. 3650 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3651 const CXXMethodDecl *Old); 3652 3653 3654 //===--------------------------------------------------------------------===// 3655 // C++ Access Control 3656 // 3657 3658 enum AccessResult { 3659 AR_accessible, 3660 AR_inaccessible, 3661 AR_dependent, 3662 AR_delayed 3663 }; 3664 3665 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3666 NamedDecl *PrevMemberDecl, 3667 AccessSpecifier LexicalAS); 3668 3669 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3670 DeclAccessPair FoundDecl); 3671 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3672 DeclAccessPair FoundDecl); 3673 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3674 SourceRange PlacementRange, 3675 CXXRecordDecl *NamingClass, 3676 DeclAccessPair FoundDecl, 3677 bool Diagnose = true); 3678 AccessResult CheckConstructorAccess(SourceLocation Loc, 3679 CXXConstructorDecl *D, 3680 const InitializedEntity &Entity, 3681 AccessSpecifier Access, 3682 bool IsCopyBindingRefToTemp = false); 3683 AccessResult CheckConstructorAccess(SourceLocation Loc, 3684 CXXConstructorDecl *D, 3685 AccessSpecifier Access, 3686 PartialDiagnostic PD); 3687 AccessResult CheckDestructorAccess(SourceLocation Loc, 3688 CXXDestructorDecl *Dtor, 3689 const PartialDiagnostic &PDiag); 3690 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3691 NamedDecl *D, 3692 const PartialDiagnostic &PDiag); 3693 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3694 Expr *ObjectExpr, 3695 Expr *ArgExpr, 3696 DeclAccessPair FoundDecl); 3697 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3698 DeclAccessPair FoundDecl); 3699 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3700 QualType Base, QualType Derived, 3701 const CXXBasePath &Path, 3702 unsigned DiagID, 3703 bool ForceCheck = false, 3704 bool ForceUnprivileged = false); 3705 void CheckLookupAccess(const LookupResult &R); 3706 bool IsSimplyAccessible(NamedDecl *decl, CXXRecordDecl *Class); 3707 3708 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3709 const MultiLevelTemplateArgumentList &TemplateArgs); 3710 void PerformDependentDiagnostics(const DeclContext *Pattern, 3711 const MultiLevelTemplateArgumentList &TemplateArgs); 3712 3713 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3714 3715 /// A flag to suppress access checking. 3716 bool SuppressAccessChecking; 3717 3718 /// \brief When true, access checking violations are treated as SFINAE 3719 /// failures rather than hard errors. 3720 bool AccessCheckingSFINAE; 3721 3722 void ActOnStartSuppressingAccessChecks(); 3723 void ActOnStopSuppressingAccessChecks(); 3724 3725 enum AbstractDiagSelID { 3726 AbstractNone = -1, 3727 AbstractReturnType, 3728 AbstractParamType, 3729 AbstractVariableType, 3730 AbstractFieldType, 3731 AbstractArrayType 3732 }; 3733 3734 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3735 const PartialDiagnostic &PD); 3736 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3737 3738 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3739 AbstractDiagSelID SelID = AbstractNone); 3740 3741 //===--------------------------------------------------------------------===// 3742 // C++ Overloaded Operators [C++ 13.5] 3743 // 3744 3745 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3746 3747 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3748 3749 //===--------------------------------------------------------------------===// 3750 // C++ Templates [C++ 14] 3751 // 3752 void FilterAcceptableTemplateNames(LookupResult &R); 3753 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3754 3755 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3756 QualType ObjectType, bool EnteringContext, 3757 bool &MemberOfUnknownSpecialization); 3758 3759 TemplateNameKind isTemplateName(Scope *S, 3760 CXXScopeSpec &SS, 3761 bool hasTemplateKeyword, 3762 UnqualifiedId &Name, 3763 ParsedType ObjectType, 3764 bool EnteringContext, 3765 TemplateTy &Template, 3766 bool &MemberOfUnknownSpecialization); 3767 3768 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3769 SourceLocation IILoc, 3770 Scope *S, 3771 const CXXScopeSpec *SS, 3772 TemplateTy &SuggestedTemplate, 3773 TemplateNameKind &SuggestedKind); 3774 3775 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3776 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3777 3778 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3779 SourceLocation EllipsisLoc, 3780 SourceLocation KeyLoc, 3781 IdentifierInfo *ParamName, 3782 SourceLocation ParamNameLoc, 3783 unsigned Depth, unsigned Position, 3784 SourceLocation EqualLoc, 3785 ParsedType DefaultArg); 3786 3787 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3788 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3789 unsigned Depth, 3790 unsigned Position, 3791 SourceLocation EqualLoc, 3792 Expr *DefaultArg); 3793 Decl *ActOnTemplateTemplateParameter(Scope *S, 3794 SourceLocation TmpLoc, 3795 TemplateParameterList *Params, 3796 SourceLocation EllipsisLoc, 3797 IdentifierInfo *ParamName, 3798 SourceLocation ParamNameLoc, 3799 unsigned Depth, 3800 unsigned Position, 3801 SourceLocation EqualLoc, 3802 ParsedTemplateArgument DefaultArg); 3803 3804 TemplateParameterList * 3805 ActOnTemplateParameterList(unsigned Depth, 3806 SourceLocation ExportLoc, 3807 SourceLocation TemplateLoc, 3808 SourceLocation LAngleLoc, 3809 Decl **Params, unsigned NumParams, 3810 SourceLocation RAngleLoc); 3811 3812 /// \brief The context in which we are checking a template parameter 3813 /// list. 3814 enum TemplateParamListContext { 3815 TPC_ClassTemplate, 3816 TPC_FunctionTemplate, 3817 TPC_ClassTemplateMember, 3818 TPC_FriendFunctionTemplate, 3819 TPC_FriendFunctionTemplateDefinition, 3820 TPC_TypeAliasTemplate 3821 }; 3822 3823 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3824 TemplateParameterList *OldParams, 3825 TemplateParamListContext TPC); 3826 TemplateParameterList * 3827 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3828 SourceLocation DeclLoc, 3829 const CXXScopeSpec &SS, 3830 TemplateParameterList **ParamLists, 3831 unsigned NumParamLists, 3832 bool IsFriend, 3833 bool &IsExplicitSpecialization, 3834 bool &Invalid); 3835 3836 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3837 SourceLocation KWLoc, CXXScopeSpec &SS, 3838 IdentifierInfo *Name, SourceLocation NameLoc, 3839 AttributeList *Attr, 3840 TemplateParameterList *TemplateParams, 3841 AccessSpecifier AS, 3842 SourceLocation ModulePrivateLoc, 3843 unsigned NumOuterTemplateParamLists, 3844 TemplateParameterList **OuterTemplateParamLists); 3845 3846 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3847 TemplateArgumentListInfo &Out); 3848 3849 void NoteAllFoundTemplates(TemplateName Name); 3850 3851 QualType CheckTemplateIdType(TemplateName Template, 3852 SourceLocation TemplateLoc, 3853 TemplateArgumentListInfo &TemplateArgs); 3854 3855 TypeResult 3856 ActOnTemplateIdType(CXXScopeSpec &SS, 3857 TemplateTy Template, SourceLocation TemplateLoc, 3858 SourceLocation LAngleLoc, 3859 ASTTemplateArgsPtr TemplateArgs, 3860 SourceLocation RAngleLoc); 3861 3862 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3863 /// such as \c class T::template apply<U>. 3864 /// 3865 /// \param TUK 3866 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3867 TypeSpecifierType TagSpec, 3868 SourceLocation TagLoc, 3869 CXXScopeSpec &SS, 3870 TemplateTy TemplateD, 3871 SourceLocation TemplateLoc, 3872 SourceLocation LAngleLoc, 3873 ASTTemplateArgsPtr TemplateArgsIn, 3874 SourceLocation RAngleLoc); 3875 3876 3877 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3878 LookupResult &R, 3879 bool RequiresADL, 3880 const TemplateArgumentListInfo &TemplateArgs); 3881 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3882 const DeclarationNameInfo &NameInfo, 3883 const TemplateArgumentListInfo &TemplateArgs); 3884 3885 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3886 SourceLocation TemplateKWLoc, 3887 CXXScopeSpec &SS, 3888 UnqualifiedId &Name, 3889 ParsedType ObjectType, 3890 bool EnteringContext, 3891 TemplateTy &Template); 3892 3893 DeclResult 3894 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3895 SourceLocation KWLoc, 3896 SourceLocation ModulePrivateLoc, 3897 CXXScopeSpec &SS, 3898 TemplateTy Template, 3899 SourceLocation TemplateNameLoc, 3900 SourceLocation LAngleLoc, 3901 ASTTemplateArgsPtr TemplateArgs, 3902 SourceLocation RAngleLoc, 3903 AttributeList *Attr, 3904 MultiTemplateParamsArg TemplateParameterLists); 3905 3906 Decl *ActOnTemplateDeclarator(Scope *S, 3907 MultiTemplateParamsArg TemplateParameterLists, 3908 Declarator &D); 3909 3910 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3911 MultiTemplateParamsArg TemplateParameterLists, 3912 Declarator &D); 3913 3914 bool 3915 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3916 TemplateSpecializationKind NewTSK, 3917 NamedDecl *PrevDecl, 3918 TemplateSpecializationKind PrevTSK, 3919 SourceLocation PrevPtOfInstantiation, 3920 bool &SuppressNew); 3921 3922 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3923 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3924 LookupResult &Previous); 3925 3926 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3927 TemplateArgumentListInfo *ExplicitTemplateArgs, 3928 LookupResult &Previous); 3929 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3930 3931 DeclResult 3932 ActOnExplicitInstantiation(Scope *S, 3933 SourceLocation ExternLoc, 3934 SourceLocation TemplateLoc, 3935 unsigned TagSpec, 3936 SourceLocation KWLoc, 3937 const CXXScopeSpec &SS, 3938 TemplateTy Template, 3939 SourceLocation TemplateNameLoc, 3940 SourceLocation LAngleLoc, 3941 ASTTemplateArgsPtr TemplateArgs, 3942 SourceLocation RAngleLoc, 3943 AttributeList *Attr); 3944 3945 DeclResult 3946 ActOnExplicitInstantiation(Scope *S, 3947 SourceLocation ExternLoc, 3948 SourceLocation TemplateLoc, 3949 unsigned TagSpec, 3950 SourceLocation KWLoc, 3951 CXXScopeSpec &SS, 3952 IdentifierInfo *Name, 3953 SourceLocation NameLoc, 3954 AttributeList *Attr); 3955 3956 DeclResult ActOnExplicitInstantiation(Scope *S, 3957 SourceLocation ExternLoc, 3958 SourceLocation TemplateLoc, 3959 Declarator &D); 3960 3961 TemplateArgumentLoc 3962 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3963 SourceLocation TemplateLoc, 3964 SourceLocation RAngleLoc, 3965 Decl *Param, 3966 SmallVectorImpl<TemplateArgument> &Converted); 3967 3968 /// \brief Specifies the context in which a particular template 3969 /// argument is being checked. 3970 enum CheckTemplateArgumentKind { 3971 /// \brief The template argument was specified in the code or was 3972 /// instantiated with some deduced template arguments. 3973 CTAK_Specified, 3974 3975 /// \brief The template argument was deduced via template argument 3976 /// deduction. 3977 CTAK_Deduced, 3978 3979 /// \brief The template argument was deduced from an array bound 3980 /// via template argument deduction. 3981 CTAK_DeducedFromArrayBound 3982 }; 3983 3984 bool CheckTemplateArgument(NamedDecl *Param, 3985 const TemplateArgumentLoc &Arg, 3986 NamedDecl *Template, 3987 SourceLocation TemplateLoc, 3988 SourceLocation RAngleLoc, 3989 unsigned ArgumentPackIndex, 3990 SmallVectorImpl<TemplateArgument> &Converted, 3991 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3992 3993 /// \brief Check that the given template arguments can be be provided to 3994 /// the given template, converting the arguments along the way. 3995 /// 3996 /// \param Template The template to which the template arguments are being 3997 /// provided. 3998 /// 3999 /// \param TemplateLoc The location of the template name in the source. 4000 /// 4001 /// \param TemplateArgs The list of template arguments. If the template is 4002 /// a template template parameter, this function may extend the set of 4003 /// template arguments to also include substituted, defaulted template 4004 /// arguments. 4005 /// 4006 /// \param PartialTemplateArgs True if the list of template arguments is 4007 /// intentionally partial, e.g., because we're checking just the initial 4008 /// set of template arguments. 4009 /// 4010 /// \param Converted Will receive the converted, canonicalized template 4011 /// arguments. 4012 /// 4013 /// \returns True if an error occurred, false otherwise. 4014 bool CheckTemplateArgumentList(TemplateDecl *Template, 4015 SourceLocation TemplateLoc, 4016 TemplateArgumentListInfo &TemplateArgs, 4017 bool PartialTemplateArgs, 4018 SmallVectorImpl<TemplateArgument> &Converted); 4019 4020 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4021 const TemplateArgumentLoc &Arg, 4022 SmallVectorImpl<TemplateArgument> &Converted); 4023 4024 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4025 TypeSourceInfo *Arg); 4026 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4027 TemplateArgument &Converted); 4028 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4029 QualType InstantiatedParamType, Expr *Arg, 4030 TemplateArgument &Converted, 4031 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4032 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4033 const TemplateArgumentLoc &Arg); 4034 4035 ExprResult 4036 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4037 QualType ParamType, 4038 SourceLocation Loc); 4039 ExprResult 4040 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4041 SourceLocation Loc); 4042 4043 /// \brief Enumeration describing how template parameter lists are compared 4044 /// for equality. 4045 enum TemplateParameterListEqualKind { 4046 /// \brief We are matching the template parameter lists of two templates 4047 /// that might be redeclarations. 4048 /// 4049 /// \code 4050 /// template<typename T> struct X; 4051 /// template<typename T> struct X; 4052 /// \endcode 4053 TPL_TemplateMatch, 4054 4055 /// \brief We are matching the template parameter lists of two template 4056 /// template parameters as part of matching the template parameter lists 4057 /// of two templates that might be redeclarations. 4058 /// 4059 /// \code 4060 /// template<template<int I> class TT> struct X; 4061 /// template<template<int Value> class Other> struct X; 4062 /// \endcode 4063 TPL_TemplateTemplateParmMatch, 4064 4065 /// \brief We are matching the template parameter lists of a template 4066 /// template argument against the template parameter lists of a template 4067 /// template parameter. 4068 /// 4069 /// \code 4070 /// template<template<int Value> class Metafun> struct X; 4071 /// template<int Value> struct integer_c; 4072 /// X<integer_c> xic; 4073 /// \endcode 4074 TPL_TemplateTemplateArgumentMatch 4075 }; 4076 4077 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4078 TemplateParameterList *Old, 4079 bool Complain, 4080 TemplateParameterListEqualKind Kind, 4081 SourceLocation TemplateArgLoc 4082 = SourceLocation()); 4083 4084 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4085 4086 /// \brief Called when the parser has parsed a C++ typename 4087 /// specifier, e.g., "typename T::type". 4088 /// 4089 /// \param S The scope in which this typename type occurs. 4090 /// \param TypenameLoc the location of the 'typename' keyword 4091 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4092 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4093 /// \param IdLoc the location of the identifier. 4094 TypeResult 4095 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4096 const CXXScopeSpec &SS, const IdentifierInfo &II, 4097 SourceLocation IdLoc); 4098 4099 /// \brief Called when the parser has parsed a C++ typename 4100 /// specifier that ends in a template-id, e.g., 4101 /// "typename MetaFun::template apply<T1, T2>". 4102 /// 4103 /// \param S The scope in which this typename type occurs. 4104 /// \param TypenameLoc the location of the 'typename' keyword 4105 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4106 /// \param TemplateLoc the location of the 'template' keyword, if any. 4107 /// \param TemplateName The template name. 4108 /// \param TemplateNameLoc The location of the template name. 4109 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4110 /// \param TemplateArgs The template arguments. 4111 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4112 TypeResult 4113 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4114 const CXXScopeSpec &SS, 4115 SourceLocation TemplateLoc, 4116 TemplateTy Template, 4117 SourceLocation TemplateNameLoc, 4118 SourceLocation LAngleLoc, 4119 ASTTemplateArgsPtr TemplateArgs, 4120 SourceLocation RAngleLoc); 4121 4122 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4123 SourceLocation KeywordLoc, 4124 NestedNameSpecifierLoc QualifierLoc, 4125 const IdentifierInfo &II, 4126 SourceLocation IILoc); 4127 4128 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4129 SourceLocation Loc, 4130 DeclarationName Name); 4131 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4132 4133 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4134 4135 std::string 4136 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4137 const TemplateArgumentList &Args); 4138 4139 std::string 4140 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4141 const TemplateArgument *Args, 4142 unsigned NumArgs); 4143 4144 //===--------------------------------------------------------------------===// 4145 // C++ Variadic Templates (C++0x [temp.variadic]) 4146 //===--------------------------------------------------------------------===// 4147 4148 /// \brief The context in which an unexpanded parameter pack is 4149 /// being diagnosed. 4150 /// 4151 /// Note that the values of this enumeration line up with the first 4152 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4153 enum UnexpandedParameterPackContext { 4154 /// \brief An arbitrary expression. 4155 UPPC_Expression = 0, 4156 4157 /// \brief The base type of a class type. 4158 UPPC_BaseType, 4159 4160 /// \brief The type of an arbitrary declaration. 4161 UPPC_DeclarationType, 4162 4163 /// \brief The type of a data member. 4164 UPPC_DataMemberType, 4165 4166 /// \brief The size of a bit-field. 4167 UPPC_BitFieldWidth, 4168 4169 /// \brief The expression in a static assertion. 4170 UPPC_StaticAssertExpression, 4171 4172 /// \brief The fixed underlying type of an enumeration. 4173 UPPC_FixedUnderlyingType, 4174 4175 /// \brief The enumerator value. 4176 UPPC_EnumeratorValue, 4177 4178 /// \brief A using declaration. 4179 UPPC_UsingDeclaration, 4180 4181 /// \brief A friend declaration. 4182 UPPC_FriendDeclaration, 4183 4184 /// \brief A declaration qualifier. 4185 UPPC_DeclarationQualifier, 4186 4187 /// \brief An initializer. 4188 UPPC_Initializer, 4189 4190 /// \brief A default argument. 4191 UPPC_DefaultArgument, 4192 4193 /// \brief The type of a non-type template parameter. 4194 UPPC_NonTypeTemplateParameterType, 4195 4196 /// \brief The type of an exception. 4197 UPPC_ExceptionType, 4198 4199 /// \brief Partial specialization. 4200 UPPC_PartialSpecialization 4201 }; 4202 4203 /// \brief If the given type contains an unexpanded parameter pack, 4204 /// diagnose the error. 4205 /// 4206 /// \param Loc The source location where a diagnostc should be emitted. 4207 /// 4208 /// \param T The type that is being checked for unexpanded parameter 4209 /// packs. 4210 /// 4211 /// \returns true if an error occurred, false otherwise. 4212 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4213 UnexpandedParameterPackContext UPPC); 4214 4215 /// \brief If the given expression contains an unexpanded parameter 4216 /// pack, diagnose the error. 4217 /// 4218 /// \param E The expression that is being checked for unexpanded 4219 /// parameter packs. 4220 /// 4221 /// \returns true if an error occurred, false otherwise. 4222 bool DiagnoseUnexpandedParameterPack(Expr *E, 4223 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4224 4225 /// \brief If the given nested-name-specifier contains an unexpanded 4226 /// parameter pack, diagnose the error. 4227 /// 4228 /// \param SS The nested-name-specifier that is being checked for 4229 /// unexpanded parameter packs. 4230 /// 4231 /// \returns true if an error occurred, false otherwise. 4232 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4233 UnexpandedParameterPackContext UPPC); 4234 4235 /// \brief If the given name contains an unexpanded parameter pack, 4236 /// diagnose the error. 4237 /// 4238 /// \param NameInfo The name (with source location information) that 4239 /// is being checked for unexpanded parameter packs. 4240 /// 4241 /// \returns true if an error occurred, false otherwise. 4242 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4243 UnexpandedParameterPackContext UPPC); 4244 4245 /// \brief If the given template name contains an unexpanded parameter pack, 4246 /// diagnose the error. 4247 /// 4248 /// \param Loc The location of the template name. 4249 /// 4250 /// \param Template The template name that is being checked for unexpanded 4251 /// parameter packs. 4252 /// 4253 /// \returns true if an error occurred, false otherwise. 4254 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4255 TemplateName Template, 4256 UnexpandedParameterPackContext UPPC); 4257 4258 /// \brief If the given template argument contains an unexpanded parameter 4259 /// pack, diagnose the error. 4260 /// 4261 /// \param Arg The template argument that is being checked for unexpanded 4262 /// parameter packs. 4263 /// 4264 /// \returns true if an error occurred, false otherwise. 4265 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4266 UnexpandedParameterPackContext UPPC); 4267 4268 /// \brief Collect the set of unexpanded parameter packs within the given 4269 /// template argument. 4270 /// 4271 /// \param Arg The template argument that will be traversed to find 4272 /// unexpanded parameter packs. 4273 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4274 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4275 4276 /// \brief Collect the set of unexpanded parameter packs within the given 4277 /// template argument. 4278 /// 4279 /// \param Arg The template argument that will be traversed to find 4280 /// unexpanded parameter packs. 4281 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4282 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4283 4284 /// \brief Collect the set of unexpanded parameter packs within the given 4285 /// type. 4286 /// 4287 /// \param T The type that will be traversed to find 4288 /// unexpanded parameter packs. 4289 void collectUnexpandedParameterPacks(QualType T, 4290 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4291 4292 /// \brief Collect the set of unexpanded parameter packs within the given 4293 /// type. 4294 /// 4295 /// \param TL The type that will be traversed to find 4296 /// unexpanded parameter packs. 4297 void collectUnexpandedParameterPacks(TypeLoc TL, 4298 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4299 4300 /// \brief Invoked when parsing a template argument followed by an 4301 /// ellipsis, which creates a pack expansion. 4302 /// 4303 /// \param Arg The template argument preceding the ellipsis, which 4304 /// may already be invalid. 4305 /// 4306 /// \param EllipsisLoc The location of the ellipsis. 4307 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4308 SourceLocation EllipsisLoc); 4309 4310 /// \brief Invoked when parsing a type followed by an ellipsis, which 4311 /// creates a pack expansion. 4312 /// 4313 /// \param Type The type preceding the ellipsis, which will become 4314 /// the pattern of the pack expansion. 4315 /// 4316 /// \param EllipsisLoc The location of the ellipsis. 4317 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4318 4319 /// \brief Construct a pack expansion type from the pattern of the pack 4320 /// expansion. 4321 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4322 SourceLocation EllipsisLoc, 4323 llvm::Optional<unsigned> NumExpansions); 4324 4325 /// \brief Construct a pack expansion type from the pattern of the pack 4326 /// expansion. 4327 QualType CheckPackExpansion(QualType Pattern, 4328 SourceRange PatternRange, 4329 SourceLocation EllipsisLoc, 4330 llvm::Optional<unsigned> NumExpansions); 4331 4332 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4333 /// creates a pack expansion. 4334 /// 4335 /// \param Pattern The expression preceding the ellipsis, which will become 4336 /// the pattern of the pack expansion. 4337 /// 4338 /// \param EllipsisLoc The location of the ellipsis. 4339 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4340 4341 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4342 /// creates a pack expansion. 4343 /// 4344 /// \param Pattern The expression preceding the ellipsis, which will become 4345 /// the pattern of the pack expansion. 4346 /// 4347 /// \param EllipsisLoc The location of the ellipsis. 4348 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4349 llvm::Optional<unsigned> NumExpansions); 4350 4351 /// \brief Determine whether we could expand a pack expansion with the 4352 /// given set of parameter packs into separate arguments by repeatedly 4353 /// transforming the pattern. 4354 /// 4355 /// \param EllipsisLoc The location of the ellipsis that identifies the 4356 /// pack expansion. 4357 /// 4358 /// \param PatternRange The source range that covers the entire pattern of 4359 /// the pack expansion. 4360 /// 4361 /// \param Unexpanded The set of unexpanded parameter packs within the 4362 /// pattern. 4363 /// 4364 /// \param NumUnexpanded The number of unexpanded parameter packs in 4365 /// \p Unexpanded. 4366 /// 4367 /// \param ShouldExpand Will be set to \c true if the transformer should 4368 /// expand the corresponding pack expansions into separate arguments. When 4369 /// set, \c NumExpansions must also be set. 4370 /// 4371 /// \param RetainExpansion Whether the caller should add an unexpanded 4372 /// pack expansion after all of the expanded arguments. This is used 4373 /// when extending explicitly-specified template argument packs per 4374 /// C++0x [temp.arg.explicit]p9. 4375 /// 4376 /// \param NumExpansions The number of separate arguments that will be in 4377 /// the expanded form of the corresponding pack expansion. This is both an 4378 /// input and an output parameter, which can be set by the caller if the 4379 /// number of expansions is known a priori (e.g., due to a prior substitution) 4380 /// and will be set by the callee when the number of expansions is known. 4381 /// The callee must set this value when \c ShouldExpand is \c true; it may 4382 /// set this value in other cases. 4383 /// 4384 /// \returns true if an error occurred (e.g., because the parameter packs 4385 /// are to be instantiated with arguments of different lengths), false 4386 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4387 /// must be set. 4388 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4389 SourceRange PatternRange, 4390 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4391 const MultiLevelTemplateArgumentList &TemplateArgs, 4392 bool &ShouldExpand, 4393 bool &RetainExpansion, 4394 llvm::Optional<unsigned> &NumExpansions); 4395 4396 /// \brief Determine the number of arguments in the given pack expansion 4397 /// type. 4398 /// 4399 /// This routine already assumes that the pack expansion type can be 4400 /// expanded and that the number of arguments in the expansion is 4401 /// consistent across all of the unexpanded parameter packs in its pattern. 4402 unsigned getNumArgumentsInExpansion(QualType T, 4403 const MultiLevelTemplateArgumentList &TemplateArgs); 4404 4405 /// \brief Determine whether the given declarator contains any unexpanded 4406 /// parameter packs. 4407 /// 4408 /// This routine is used by the parser to disambiguate function declarators 4409 /// with an ellipsis prior to the ')', e.g., 4410 /// 4411 /// \code 4412 /// void f(T...); 4413 /// \endcode 4414 /// 4415 /// To determine whether we have an (unnamed) function parameter pack or 4416 /// a variadic function. 4417 /// 4418 /// \returns true if the declarator contains any unexpanded parameter packs, 4419 /// false otherwise. 4420 bool containsUnexpandedParameterPacks(Declarator &D); 4421 4422 //===--------------------------------------------------------------------===// 4423 // C++ Template Argument Deduction (C++ [temp.deduct]) 4424 //===--------------------------------------------------------------------===// 4425 4426 /// \brief Describes the result of template argument deduction. 4427 /// 4428 /// The TemplateDeductionResult enumeration describes the result of 4429 /// template argument deduction, as returned from 4430 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4431 /// structure provides additional information about the results of 4432 /// template argument deduction, e.g., the deduced template argument 4433 /// list (if successful) or the specific template parameters or 4434 /// deduced arguments that were involved in the failure. 4435 enum TemplateDeductionResult { 4436 /// \brief Template argument deduction was successful. 4437 TDK_Success = 0, 4438 /// \brief Template argument deduction exceeded the maximum template 4439 /// instantiation depth (which has already been diagnosed). 4440 TDK_InstantiationDepth, 4441 /// \brief Template argument deduction did not deduce a value 4442 /// for every template parameter. 4443 TDK_Incomplete, 4444 /// \brief Template argument deduction produced inconsistent 4445 /// deduced values for the given template parameter. 4446 TDK_Inconsistent, 4447 /// \brief Template argument deduction failed due to inconsistent 4448 /// cv-qualifiers on a template parameter type that would 4449 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4450 /// but were given a non-const "X". 4451 TDK_Underqualified, 4452 /// \brief Substitution of the deduced template argument values 4453 /// resulted in an error. 4454 TDK_SubstitutionFailure, 4455 /// \brief Substitution of the deduced template argument values 4456 /// into a non-deduced context produced a type or value that 4457 /// produces a type that does not match the original template 4458 /// arguments provided. 4459 TDK_NonDeducedMismatch, 4460 /// \brief When performing template argument deduction for a function 4461 /// template, there were too many call arguments. 4462 TDK_TooManyArguments, 4463 /// \brief When performing template argument deduction for a function 4464 /// template, there were too few call arguments. 4465 TDK_TooFewArguments, 4466 /// \brief The explicitly-specified template arguments were not valid 4467 /// template arguments for the given template. 4468 TDK_InvalidExplicitArguments, 4469 /// \brief The arguments included an overloaded function name that could 4470 /// not be resolved to a suitable function. 4471 TDK_FailedOverloadResolution 4472 }; 4473 4474 TemplateDeductionResult 4475 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4476 const TemplateArgumentList &TemplateArgs, 4477 sema::TemplateDeductionInfo &Info); 4478 4479 TemplateDeductionResult 4480 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4481 TemplateArgumentListInfo &ExplicitTemplateArgs, 4482 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4483 SmallVectorImpl<QualType> &ParamTypes, 4484 QualType *FunctionType, 4485 sema::TemplateDeductionInfo &Info); 4486 4487 /// brief A function argument from which we performed template argument 4488 // deduction for a call. 4489 struct OriginalCallArg { 4490 OriginalCallArg(QualType OriginalParamType, 4491 unsigned ArgIdx, 4492 QualType OriginalArgType) 4493 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4494 OriginalArgType(OriginalArgType) { } 4495 4496 QualType OriginalParamType; 4497 unsigned ArgIdx; 4498 QualType OriginalArgType; 4499 }; 4500 4501 TemplateDeductionResult 4502 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4503 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4504 unsigned NumExplicitlySpecified, 4505 FunctionDecl *&Specialization, 4506 sema::TemplateDeductionInfo &Info, 4507 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4508 4509 TemplateDeductionResult 4510 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4511 TemplateArgumentListInfo *ExplicitTemplateArgs, 4512 Expr **Args, unsigned NumArgs, 4513 FunctionDecl *&Specialization, 4514 sema::TemplateDeductionInfo &Info); 4515 4516 TemplateDeductionResult 4517 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4518 TemplateArgumentListInfo *ExplicitTemplateArgs, 4519 QualType ArgFunctionType, 4520 FunctionDecl *&Specialization, 4521 sema::TemplateDeductionInfo &Info); 4522 4523 TemplateDeductionResult 4524 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4525 QualType ToType, 4526 CXXConversionDecl *&Specialization, 4527 sema::TemplateDeductionInfo &Info); 4528 4529 TemplateDeductionResult 4530 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4531 TemplateArgumentListInfo *ExplicitTemplateArgs, 4532 FunctionDecl *&Specialization, 4533 sema::TemplateDeductionInfo &Info); 4534 4535 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4536 TypeSourceInfo *&Result); 4537 4538 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4539 FunctionTemplateDecl *FT2, 4540 SourceLocation Loc, 4541 TemplatePartialOrderingContext TPOC, 4542 unsigned NumCallArguments); 4543 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4544 UnresolvedSetIterator SEnd, 4545 TemplatePartialOrderingContext TPOC, 4546 unsigned NumCallArguments, 4547 SourceLocation Loc, 4548 const PartialDiagnostic &NoneDiag, 4549 const PartialDiagnostic &AmbigDiag, 4550 const PartialDiagnostic &CandidateDiag, 4551 bool Complain = true); 4552 4553 ClassTemplatePartialSpecializationDecl * 4554 getMoreSpecializedPartialSpecialization( 4555 ClassTemplatePartialSpecializationDecl *PS1, 4556 ClassTemplatePartialSpecializationDecl *PS2, 4557 SourceLocation Loc); 4558 4559 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4560 bool OnlyDeduced, 4561 unsigned Depth, 4562 SmallVectorImpl<bool> &Used); 4563 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4564 SmallVectorImpl<bool> &Deduced); 4565 4566 //===--------------------------------------------------------------------===// 4567 // C++ Template Instantiation 4568 // 4569 4570 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4571 const TemplateArgumentList *Innermost = 0, 4572 bool RelativeToPrimary = false, 4573 const FunctionDecl *Pattern = 0); 4574 4575 /// \brief A template instantiation that is currently in progress. 4576 struct ActiveTemplateInstantiation { 4577 /// \brief The kind of template instantiation we are performing 4578 enum InstantiationKind { 4579 /// We are instantiating a template declaration. The entity is 4580 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4581 TemplateInstantiation, 4582 4583 /// We are instantiating a default argument for a template 4584 /// parameter. The Entity is the template, and 4585 /// TemplateArgs/NumTemplateArguments provides the template 4586 /// arguments as specified. 4587 /// FIXME: Use a TemplateArgumentList 4588 DefaultTemplateArgumentInstantiation, 4589 4590 /// We are instantiating a default argument for a function. 4591 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4592 /// provides the template arguments as specified. 4593 DefaultFunctionArgumentInstantiation, 4594 4595 /// We are substituting explicit template arguments provided for 4596 /// a function template. The entity is a FunctionTemplateDecl. 4597 ExplicitTemplateArgumentSubstitution, 4598 4599 /// We are substituting template argument determined as part of 4600 /// template argument deduction for either a class template 4601 /// partial specialization or a function template. The 4602 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4603 /// a FunctionTemplateDecl. 4604 DeducedTemplateArgumentSubstitution, 4605 4606 /// We are substituting prior template arguments into a new 4607 /// template parameter. The template parameter itself is either a 4608 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4609 PriorTemplateArgumentSubstitution, 4610 4611 /// We are checking the validity of a default template argument that 4612 /// has been used when naming a template-id. 4613 DefaultTemplateArgumentChecking 4614 } Kind; 4615 4616 /// \brief The point of instantiation within the source code. 4617 SourceLocation PointOfInstantiation; 4618 4619 /// \brief The template (or partial specialization) in which we are 4620 /// performing the instantiation, for substitutions of prior template 4621 /// arguments. 4622 NamedDecl *Template; 4623 4624 /// \brief The entity that is being instantiated. 4625 uintptr_t Entity; 4626 4627 /// \brief The list of template arguments we are substituting, if they 4628 /// are not part of the entity. 4629 const TemplateArgument *TemplateArgs; 4630 4631 /// \brief The number of template arguments in TemplateArgs. 4632 unsigned NumTemplateArgs; 4633 4634 /// \brief The template deduction info object associated with the 4635 /// substitution or checking of explicit or deduced template arguments. 4636 sema::TemplateDeductionInfo *DeductionInfo; 4637 4638 /// \brief The source range that covers the construct that cause 4639 /// the instantiation, e.g., the template-id that causes a class 4640 /// template instantiation. 4641 SourceRange InstantiationRange; 4642 4643 ActiveTemplateInstantiation() 4644 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4645 NumTemplateArgs(0), DeductionInfo(0) {} 4646 4647 /// \brief Determines whether this template is an actual instantiation 4648 /// that should be counted toward the maximum instantiation depth. 4649 bool isInstantiationRecord() const; 4650 4651 friend bool operator==(const ActiveTemplateInstantiation &X, 4652 const ActiveTemplateInstantiation &Y) { 4653 if (X.Kind != Y.Kind) 4654 return false; 4655 4656 if (X.Entity != Y.Entity) 4657 return false; 4658 4659 switch (X.Kind) { 4660 case TemplateInstantiation: 4661 return true; 4662 4663 case PriorTemplateArgumentSubstitution: 4664 case DefaultTemplateArgumentChecking: 4665 if (X.Template != Y.Template) 4666 return false; 4667 4668 // Fall through 4669 4670 case DefaultTemplateArgumentInstantiation: 4671 case ExplicitTemplateArgumentSubstitution: 4672 case DeducedTemplateArgumentSubstitution: 4673 case DefaultFunctionArgumentInstantiation: 4674 return X.TemplateArgs == Y.TemplateArgs; 4675 4676 } 4677 4678 return true; 4679 } 4680 4681 friend bool operator!=(const ActiveTemplateInstantiation &X, 4682 const ActiveTemplateInstantiation &Y) { 4683 return !(X == Y); 4684 } 4685 }; 4686 4687 /// \brief List of active template instantiations. 4688 /// 4689 /// This vector is treated as a stack. As one template instantiation 4690 /// requires another template instantiation, additional 4691 /// instantiations are pushed onto the stack up to a 4692 /// user-configurable limit LangOptions::InstantiationDepth. 4693 SmallVector<ActiveTemplateInstantiation, 16> 4694 ActiveTemplateInstantiations; 4695 4696 /// \brief Whether we are in a SFINAE context that is not associated with 4697 /// template instantiation. 4698 /// 4699 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4700 /// of a template instantiation or template argument deduction. 4701 bool InNonInstantiationSFINAEContext; 4702 4703 /// \brief The number of ActiveTemplateInstantiation entries in 4704 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4705 /// therefore, should not be counted as part of the instantiation depth. 4706 unsigned NonInstantiationEntries; 4707 4708 /// \brief The last template from which a template instantiation 4709 /// error or warning was produced. 4710 /// 4711 /// This value is used to suppress printing of redundant template 4712 /// instantiation backtraces when there are multiple errors in the 4713 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4714 /// to implement it anywhere else. 4715 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4716 4717 /// \brief The current index into pack expansion arguments that will be 4718 /// used for substitution of parameter packs. 4719 /// 4720 /// The pack expansion index will be -1 to indicate that parameter packs 4721 /// should be instantiated as themselves. Otherwise, the index specifies 4722 /// which argument within the parameter pack will be used for substitution. 4723 int ArgumentPackSubstitutionIndex; 4724 4725 /// \brief RAII object used to change the argument pack substitution index 4726 /// within a \c Sema object. 4727 /// 4728 /// See \c ArgumentPackSubstitutionIndex for more information. 4729 class ArgumentPackSubstitutionIndexRAII { 4730 Sema &Self; 4731 int OldSubstitutionIndex; 4732 4733 public: 4734 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4735 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4736 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4737 } 4738 4739 ~ArgumentPackSubstitutionIndexRAII() { 4740 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4741 } 4742 }; 4743 4744 friend class ArgumentPackSubstitutionRAII; 4745 4746 /// \brief The stack of calls expression undergoing template instantiation. 4747 /// 4748 /// The top of this stack is used by a fixit instantiating unresolved 4749 /// function calls to fix the AST to match the textual change it prints. 4750 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4751 4752 /// \brief For each declaration that involved template argument deduction, the 4753 /// set of diagnostics that were suppressed during that template argument 4754 /// deduction. 4755 /// 4756 /// FIXME: Serialize this structure to the AST file. 4757 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4758 SuppressedDiagnostics; 4759 4760 /// \brief A stack object to be created when performing template 4761 /// instantiation. 4762 /// 4763 /// Construction of an object of type \c InstantiatingTemplate 4764 /// pushes the current instantiation onto the stack of active 4765 /// instantiations. If the size of this stack exceeds the maximum 4766 /// number of recursive template instantiations, construction 4767 /// produces an error and evaluates true. 4768 /// 4769 /// Destruction of this object will pop the named instantiation off 4770 /// the stack. 4771 struct InstantiatingTemplate { 4772 /// \brief Note that we are instantiating a class template, 4773 /// function template, or a member thereof. 4774 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4775 Decl *Entity, 4776 SourceRange InstantiationRange = SourceRange()); 4777 4778 /// \brief Note that we are instantiating a default argument in a 4779 /// template-id. 4780 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4781 TemplateDecl *Template, 4782 const TemplateArgument *TemplateArgs, 4783 unsigned NumTemplateArgs, 4784 SourceRange InstantiationRange = SourceRange()); 4785 4786 /// \brief Note that we are instantiating a default argument in a 4787 /// template-id. 4788 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4789 FunctionTemplateDecl *FunctionTemplate, 4790 const TemplateArgument *TemplateArgs, 4791 unsigned NumTemplateArgs, 4792 ActiveTemplateInstantiation::InstantiationKind Kind, 4793 sema::TemplateDeductionInfo &DeductionInfo, 4794 SourceRange InstantiationRange = SourceRange()); 4795 4796 /// \brief Note that we are instantiating as part of template 4797 /// argument deduction for a class template partial 4798 /// specialization. 4799 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4800 ClassTemplatePartialSpecializationDecl *PartialSpec, 4801 const TemplateArgument *TemplateArgs, 4802 unsigned NumTemplateArgs, 4803 sema::TemplateDeductionInfo &DeductionInfo, 4804 SourceRange InstantiationRange = SourceRange()); 4805 4806 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4807 ParmVarDecl *Param, 4808 const TemplateArgument *TemplateArgs, 4809 unsigned NumTemplateArgs, 4810 SourceRange InstantiationRange = SourceRange()); 4811 4812 /// \brief Note that we are substituting prior template arguments into a 4813 /// non-type or template template parameter. 4814 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4815 NamedDecl *Template, 4816 NonTypeTemplateParmDecl *Param, 4817 const TemplateArgument *TemplateArgs, 4818 unsigned NumTemplateArgs, 4819 SourceRange InstantiationRange); 4820 4821 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4822 NamedDecl *Template, 4823 TemplateTemplateParmDecl *Param, 4824 const TemplateArgument *TemplateArgs, 4825 unsigned NumTemplateArgs, 4826 SourceRange InstantiationRange); 4827 4828 /// \brief Note that we are checking the default template argument 4829 /// against the template parameter for a given template-id. 4830 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4831 TemplateDecl *Template, 4832 NamedDecl *Param, 4833 const TemplateArgument *TemplateArgs, 4834 unsigned NumTemplateArgs, 4835 SourceRange InstantiationRange); 4836 4837 4838 /// \brief Note that we have finished instantiating this template. 4839 void Clear(); 4840 4841 ~InstantiatingTemplate() { Clear(); } 4842 4843 /// \brief Determines whether we have exceeded the maximum 4844 /// recursive template instantiations. 4845 operator bool() const { return Invalid; } 4846 4847 private: 4848 Sema &SemaRef; 4849 bool Invalid; 4850 bool SavedInNonInstantiationSFINAEContext; 4851 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4852 SourceRange InstantiationRange); 4853 4854 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4855 4856 InstantiatingTemplate& 4857 operator=(const InstantiatingTemplate&); // not implemented 4858 }; 4859 4860 void PrintInstantiationStack(); 4861 4862 /// \brief Determines whether we are currently in a context where 4863 /// template argument substitution failures are not considered 4864 /// errors. 4865 /// 4866 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4867 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4868 /// template-deduction context object, which can be used to capture 4869 /// diagnostics that will be suppressed. 4870 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4871 4872 /// \brief RAII class used to determine whether SFINAE has 4873 /// trapped any errors that occur during template argument 4874 /// deduction.` 4875 class SFINAETrap { 4876 Sema &SemaRef; 4877 unsigned PrevSFINAEErrors; 4878 bool PrevInNonInstantiationSFINAEContext; 4879 bool PrevAccessCheckingSFINAE; 4880 4881 public: 4882 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4883 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4884 PrevInNonInstantiationSFINAEContext( 4885 SemaRef.InNonInstantiationSFINAEContext), 4886 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4887 { 4888 if (!SemaRef.isSFINAEContext()) 4889 SemaRef.InNonInstantiationSFINAEContext = true; 4890 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4891 } 4892 4893 ~SFINAETrap() { 4894 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4895 SemaRef.InNonInstantiationSFINAEContext 4896 = PrevInNonInstantiationSFINAEContext; 4897 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4898 } 4899 4900 /// \brief Determine whether any SFINAE errors have been trapped. 4901 bool hasErrorOccurred() const { 4902 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4903 } 4904 }; 4905 4906 /// \brief The current instantiation scope used to store local 4907 /// variables. 4908 LocalInstantiationScope *CurrentInstantiationScope; 4909 4910 /// \brief The number of typos corrected by CorrectTypo. 4911 unsigned TyposCorrected; 4912 4913 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4914 UnqualifiedTyposCorrectedMap; 4915 4916 /// \brief A cache containing the results of typo correction for unqualified 4917 /// name lookup. 4918 /// 4919 /// The string is the string that we corrected to (which may be empty, if 4920 /// there was no correction), while the boolean will be true when the 4921 /// string represents a keyword. 4922 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4923 4924 /// \brief Worker object for performing CFG-based warnings. 4925 sema::AnalysisBasedWarnings AnalysisWarnings; 4926 4927 /// \brief An entity for which implicit template instantiation is required. 4928 /// 4929 /// The source location associated with the declaration is the first place in 4930 /// the source code where the declaration was "used". It is not necessarily 4931 /// the point of instantiation (which will be either before or after the 4932 /// namespace-scope declaration that triggered this implicit instantiation), 4933 /// However, it is the location that diagnostics should generally refer to, 4934 /// because users will need to know what code triggered the instantiation. 4935 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4936 4937 /// \brief The queue of implicit template instantiations that are required 4938 /// but have not yet been performed. 4939 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4940 4941 /// \brief The queue of implicit template instantiations that are required 4942 /// and must be performed within the current local scope. 4943 /// 4944 /// This queue is only used for member functions of local classes in 4945 /// templates, which must be instantiated in the same scope as their 4946 /// enclosing function, so that they can reference function-local 4947 /// types, static variables, enumerators, etc. 4948 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4949 4950 void PerformPendingInstantiations(bool LocalOnly = false); 4951 4952 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4953 const MultiLevelTemplateArgumentList &TemplateArgs, 4954 SourceLocation Loc, DeclarationName Entity); 4955 4956 QualType SubstType(QualType T, 4957 const MultiLevelTemplateArgumentList &TemplateArgs, 4958 SourceLocation Loc, DeclarationName Entity); 4959 4960 TypeSourceInfo *SubstType(TypeLoc TL, 4961 const MultiLevelTemplateArgumentList &TemplateArgs, 4962 SourceLocation Loc, DeclarationName Entity); 4963 4964 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4965 const MultiLevelTemplateArgumentList &TemplateArgs, 4966 SourceLocation Loc, 4967 DeclarationName Entity); 4968 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4969 const MultiLevelTemplateArgumentList &TemplateArgs, 4970 int indexAdjustment, 4971 llvm::Optional<unsigned> NumExpansions); 4972 bool SubstParmTypes(SourceLocation Loc, 4973 ParmVarDecl **Params, unsigned NumParams, 4974 const MultiLevelTemplateArgumentList &TemplateArgs, 4975 SmallVectorImpl<QualType> &ParamTypes, 4976 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4977 ExprResult SubstExpr(Expr *E, 4978 const MultiLevelTemplateArgumentList &TemplateArgs); 4979 4980 /// \brief Substitute the given template arguments into a list of 4981 /// expressions, expanding pack expansions if required. 4982 /// 4983 /// \param Exprs The list of expressions to substitute into. 4984 /// 4985 /// \param NumExprs The number of expressions in \p Exprs. 4986 /// 4987 /// \param IsCall Whether this is some form of call, in which case 4988 /// default arguments will be dropped. 4989 /// 4990 /// \param TemplateArgs The set of template arguments to substitute. 4991 /// 4992 /// \param Outputs Will receive all of the substituted arguments. 4993 /// 4994 /// \returns true if an error occurred, false otherwise. 4995 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4996 const MultiLevelTemplateArgumentList &TemplateArgs, 4997 SmallVectorImpl<Expr *> &Outputs); 4998 4999 StmtResult SubstStmt(Stmt *S, 5000 const MultiLevelTemplateArgumentList &TemplateArgs); 5001 5002 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5003 const MultiLevelTemplateArgumentList &TemplateArgs); 5004 5005 bool 5006 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5007 CXXRecordDecl *Pattern, 5008 const MultiLevelTemplateArgumentList &TemplateArgs); 5009 5010 bool 5011 InstantiateClass(SourceLocation PointOfInstantiation, 5012 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5013 const MultiLevelTemplateArgumentList &TemplateArgs, 5014 TemplateSpecializationKind TSK, 5015 bool Complain = true); 5016 5017 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5018 const Decl *Pattern, Decl *Inst); 5019 5020 bool 5021 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5022 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5023 TemplateSpecializationKind TSK, 5024 bool Complain = true); 5025 5026 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5027 CXXRecordDecl *Instantiation, 5028 const MultiLevelTemplateArgumentList &TemplateArgs, 5029 TemplateSpecializationKind TSK); 5030 5031 void InstantiateClassTemplateSpecializationMembers( 5032 SourceLocation PointOfInstantiation, 5033 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5034 TemplateSpecializationKind TSK); 5035 5036 NestedNameSpecifierLoc 5037 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5038 const MultiLevelTemplateArgumentList &TemplateArgs); 5039 5040 DeclarationNameInfo 5041 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5042 const MultiLevelTemplateArgumentList &TemplateArgs); 5043 TemplateName 5044 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5045 SourceLocation Loc, 5046 const MultiLevelTemplateArgumentList &TemplateArgs); 5047 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5048 TemplateArgumentListInfo &Result, 5049 const MultiLevelTemplateArgumentList &TemplateArgs); 5050 5051 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5052 FunctionDecl *Function, 5053 bool Recursive = false, 5054 bool DefinitionRequired = false); 5055 void InstantiateStaticDataMemberDefinition( 5056 SourceLocation PointOfInstantiation, 5057 VarDecl *Var, 5058 bool Recursive = false, 5059 bool DefinitionRequired = false); 5060 5061 void InstantiateMemInitializers(CXXConstructorDecl *New, 5062 const CXXConstructorDecl *Tmpl, 5063 const MultiLevelTemplateArgumentList &TemplateArgs); 5064 bool InstantiateInitializer(Expr *Init, 5065 const MultiLevelTemplateArgumentList &TemplateArgs, 5066 SourceLocation &LParenLoc, 5067 ASTOwningVector<Expr*> &NewArgs, 5068 SourceLocation &RParenLoc); 5069 5070 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5071 const MultiLevelTemplateArgumentList &TemplateArgs); 5072 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5073 const MultiLevelTemplateArgumentList &TemplateArgs); 5074 5075 // Objective-C declarations. 5076 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5077 IdentifierInfo *ClassName, 5078 SourceLocation ClassLoc, 5079 IdentifierInfo *SuperName, 5080 SourceLocation SuperLoc, 5081 Decl * const *ProtoRefs, 5082 unsigned NumProtoRefs, 5083 const SourceLocation *ProtoLocs, 5084 SourceLocation EndProtoLoc, 5085 AttributeList *AttrList); 5086 5087 Decl *ActOnCompatiblityAlias( 5088 SourceLocation AtCompatibilityAliasLoc, 5089 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5090 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5091 5092 bool CheckForwardProtocolDeclarationForCircularDependency( 5093 IdentifierInfo *PName, 5094 SourceLocation &PLoc, SourceLocation PrevLoc, 5095 const ObjCList<ObjCProtocolDecl> &PList); 5096 5097 Decl *ActOnStartProtocolInterface( 5098 SourceLocation AtProtoInterfaceLoc, 5099 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5100 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5101 const SourceLocation *ProtoLocs, 5102 SourceLocation EndProtoLoc, 5103 AttributeList *AttrList); 5104 5105 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5106 IdentifierInfo *ClassName, 5107 SourceLocation ClassLoc, 5108 IdentifierInfo *CategoryName, 5109 SourceLocation CategoryLoc, 5110 Decl * const *ProtoRefs, 5111 unsigned NumProtoRefs, 5112 const SourceLocation *ProtoLocs, 5113 SourceLocation EndProtoLoc); 5114 5115 Decl *ActOnStartClassImplementation( 5116 SourceLocation AtClassImplLoc, 5117 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5118 IdentifierInfo *SuperClassname, 5119 SourceLocation SuperClassLoc); 5120 5121 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5122 IdentifierInfo *ClassName, 5123 SourceLocation ClassLoc, 5124 IdentifierInfo *CatName, 5125 SourceLocation CatLoc); 5126 5127 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5128 IdentifierInfo **IdentList, 5129 SourceLocation *IdentLocs, 5130 unsigned NumElts); 5131 5132 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5133 const IdentifierLocPair *IdentList, 5134 unsigned NumElts, 5135 AttributeList *attrList); 5136 5137 void FindProtocolDeclaration(bool WarnOnDeclarations, 5138 const IdentifierLocPair *ProtocolId, 5139 unsigned NumProtocols, 5140 SmallVectorImpl<Decl *> &Protocols); 5141 5142 /// Ensure attributes are consistent with type. 5143 /// \param [in, out] Attributes The attributes to check; they will 5144 /// be modified to be consistent with \arg PropertyTy. 5145 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5146 SourceLocation Loc, 5147 unsigned &Attributes); 5148 5149 /// Process the specified property declaration and create decls for the 5150 /// setters and getters as needed. 5151 /// \param property The property declaration being processed 5152 /// \param DC The semantic container for the property 5153 /// \param redeclaredProperty Declaration for property if redeclared 5154 /// in class extension. 5155 /// \param lexicalDC Container for redeclaredProperty. 5156 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5157 ObjCContainerDecl *DC, 5158 ObjCPropertyDecl *redeclaredProperty = 0, 5159 ObjCContainerDecl *lexicalDC = 0); 5160 5161 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5162 ObjCPropertyDecl *SuperProperty, 5163 const IdentifierInfo *Name); 5164 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5165 5166 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5167 ObjCMethodDecl *MethodDecl, 5168 bool IsInstance); 5169 5170 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5171 5172 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5173 ObjCInterfaceDecl *ID); 5174 5175 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5176 ObjCProtocolDecl *PDecl); 5177 5178 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5179 Decl **allMethods = 0, unsigned allNum = 0, 5180 Decl **allProperties = 0, unsigned pNum = 0, 5181 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5182 5183 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5184 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5185 Selector GetterSel, Selector SetterSel, 5186 bool *OverridingProperty, 5187 tok::ObjCKeywordKind MethodImplKind, 5188 DeclContext *lexicalDC = 0); 5189 5190 Decl *ActOnPropertyImplDecl(Scope *S, 5191 SourceLocation AtLoc, 5192 SourceLocation PropertyLoc, 5193 bool ImplKind, 5194 IdentifierInfo *PropertyId, 5195 IdentifierInfo *PropertyIvar, 5196 SourceLocation PropertyIvarLoc); 5197 5198 enum ObjCSpecialMethodKind { 5199 OSMK_None, 5200 OSMK_Alloc, 5201 OSMK_New, 5202 OSMK_Copy, 5203 OSMK_RetainingInit, 5204 OSMK_NonRetainingInit 5205 }; 5206 5207 struct ObjCArgInfo { 5208 IdentifierInfo *Name; 5209 SourceLocation NameLoc; 5210 // The Type is null if no type was specified, and the DeclSpec is invalid 5211 // in this case. 5212 ParsedType Type; 5213 ObjCDeclSpec DeclSpec; 5214 5215 /// ArgAttrs - Attribute list for this argument. 5216 AttributeList *ArgAttrs; 5217 }; 5218 5219 Decl *ActOnMethodDeclaration( 5220 Scope *S, 5221 SourceLocation BeginLoc, // location of the + or -. 5222 SourceLocation EndLoc, // location of the ; or {. 5223 tok::TokenKind MethodType, 5224 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5225 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5226 // optional arguments. The number of types/arguments is obtained 5227 // from the Sel.getNumArgs(). 5228 ObjCArgInfo *ArgInfo, 5229 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5230 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5231 bool isVariadic, bool MethodDefinition); 5232 5233 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5234 // Will search "local" class/category implementations for a method decl. 5235 // Will also search in class's root looking for instance method. 5236 // Returns 0 if no method is found. 5237 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5238 ObjCInterfaceDecl *CDecl); 5239 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5240 ObjCInterfaceDecl *ClassDecl); 5241 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5242 const ObjCObjectPointerType *OPT, 5243 bool IsInstance); 5244 5245 bool inferObjCARCLifetime(ValueDecl *decl); 5246 5247 ExprResult 5248 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5249 Expr *BaseExpr, 5250 SourceLocation OpLoc, 5251 DeclarationName MemberName, 5252 SourceLocation MemberLoc, 5253 SourceLocation SuperLoc, QualType SuperType, 5254 bool Super); 5255 5256 ExprResult 5257 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5258 IdentifierInfo &propertyName, 5259 SourceLocation receiverNameLoc, 5260 SourceLocation propertyNameLoc); 5261 5262 ObjCMethodDecl *tryCaptureObjCSelf(); 5263 5264 /// \brief Describes the kind of message expression indicated by a message 5265 /// send that starts with an identifier. 5266 enum ObjCMessageKind { 5267 /// \brief The message is sent to 'super'. 5268 ObjCSuperMessage, 5269 /// \brief The message is an instance message. 5270 ObjCInstanceMessage, 5271 /// \brief The message is a class message, and the identifier is a type 5272 /// name. 5273 ObjCClassMessage 5274 }; 5275 5276 ObjCMessageKind getObjCMessageKind(Scope *S, 5277 IdentifierInfo *Name, 5278 SourceLocation NameLoc, 5279 bool IsSuper, 5280 bool HasTrailingDot, 5281 ParsedType &ReceiverType); 5282 5283 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5284 Selector Sel, 5285 SourceLocation LBracLoc, 5286 ArrayRef<SourceLocation> SelectorLocs, 5287 SourceLocation RBracLoc, 5288 MultiExprArg Args); 5289 5290 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5291 QualType ReceiverType, 5292 SourceLocation SuperLoc, 5293 Selector Sel, 5294 ObjCMethodDecl *Method, 5295 SourceLocation LBracLoc, 5296 ArrayRef<SourceLocation> SelectorLocs, 5297 SourceLocation RBracLoc, 5298 MultiExprArg Args); 5299 5300 ExprResult ActOnClassMessage(Scope *S, 5301 ParsedType Receiver, 5302 Selector Sel, 5303 SourceLocation LBracLoc, 5304 ArrayRef<SourceLocation> SelectorLocs, 5305 SourceLocation RBracLoc, 5306 MultiExprArg Args); 5307 5308 ExprResult BuildInstanceMessage(Expr *Receiver, 5309 QualType ReceiverType, 5310 SourceLocation SuperLoc, 5311 Selector Sel, 5312 ObjCMethodDecl *Method, 5313 SourceLocation LBracLoc, 5314 ArrayRef<SourceLocation> SelectorLocs, 5315 SourceLocation RBracLoc, 5316 MultiExprArg Args); 5317 5318 ExprResult ActOnInstanceMessage(Scope *S, 5319 Expr *Receiver, 5320 Selector Sel, 5321 SourceLocation LBracLoc, 5322 ArrayRef<SourceLocation> SelectorLocs, 5323 SourceLocation RBracLoc, 5324 MultiExprArg Args); 5325 5326 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5327 ObjCBridgeCastKind Kind, 5328 SourceLocation BridgeKeywordLoc, 5329 TypeSourceInfo *TSInfo, 5330 Expr *SubExpr); 5331 5332 ExprResult ActOnObjCBridgedCast(Scope *S, 5333 SourceLocation LParenLoc, 5334 ObjCBridgeCastKind Kind, 5335 SourceLocation BridgeKeywordLoc, 5336 ParsedType Type, 5337 SourceLocation RParenLoc, 5338 Expr *SubExpr); 5339 5340 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5341 5342 /// \brief Check whether the given new method is a valid override of the 5343 /// given overridden method, and set any properties that should be inherited. 5344 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5345 const ObjCMethodDecl *Overridden, 5346 bool IsImplementation); 5347 5348 /// \brief Check whether the given method overrides any methods in its class, 5349 /// calling \c CheckObjCMethodOverride for each overridden method. 5350 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5351 5352 enum PragmaOptionsAlignKind { 5353 POAK_Native, // #pragma options align=native 5354 POAK_Natural, // #pragma options align=natural 5355 POAK_Packed, // #pragma options align=packed 5356 POAK_Power, // #pragma options align=power 5357 POAK_Mac68k, // #pragma options align=mac68k 5358 POAK_Reset // #pragma options align=reset 5359 }; 5360 5361 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5362 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5363 SourceLocation PragmaLoc, 5364 SourceLocation KindLoc); 5365 5366 enum PragmaPackKind { 5367 PPK_Default, // #pragma pack([n]) 5368 PPK_Show, // #pragma pack(show), only supported by MSVC. 5369 PPK_Push, // #pragma pack(push, [identifier], [n]) 5370 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5371 }; 5372 5373 enum PragmaMSStructKind { 5374 PMSST_OFF, // #pragms ms_struct off 5375 PMSST_ON // #pragms ms_struct on 5376 }; 5377 5378 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5379 void ActOnPragmaPack(PragmaPackKind Kind, 5380 IdentifierInfo *Name, 5381 Expr *Alignment, 5382 SourceLocation PragmaLoc, 5383 SourceLocation LParenLoc, 5384 SourceLocation RParenLoc); 5385 5386 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5387 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5388 5389 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5390 void ActOnPragmaUnused(const Token &Identifier, 5391 Scope *curScope, 5392 SourceLocation PragmaLoc); 5393 5394 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5395 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5396 SourceLocation PragmaLoc); 5397 5398 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5399 SourceLocation Loc); 5400 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5401 5402 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5403 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5404 SourceLocation PragmaLoc, 5405 SourceLocation WeakNameLoc); 5406 5407 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5408 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5409 IdentifierInfo* AliasName, 5410 SourceLocation PragmaLoc, 5411 SourceLocation WeakNameLoc, 5412 SourceLocation AliasNameLoc); 5413 5414 /// ActOnPragmaFPContract - Called on well formed 5415 /// #pragma {STDC,OPENCL} FP_CONTRACT 5416 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5417 5418 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5419 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5420 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5421 5422 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5423 void AddMsStructLayoutForRecord(RecordDecl *RD); 5424 5425 /// FreePackedContext - Deallocate and null out PackContext. 5426 void FreePackedContext(); 5427 5428 /// PushNamespaceVisibilityAttr - Note that we've entered a 5429 /// namespace with a visibility attribute. 5430 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5431 5432 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5433 /// add an appropriate visibility attribute. 5434 void AddPushedVisibilityAttribute(Decl *RD); 5435 5436 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5437 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5438 void PopPragmaVisibility(); 5439 5440 /// FreeVisContext - Deallocate and null out VisContext. 5441 void FreeVisContext(); 5442 5443 /// AddCFAuditedAttribute - Check whether we're currently within 5444 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5445 /// the appropriate attribute. 5446 void AddCFAuditedAttribute(Decl *D); 5447 5448 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5449 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5450 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5451 5452 /// \brief The kind of conversion being performed. 5453 enum CheckedConversionKind { 5454 /// \brief An implicit conversion. 5455 CCK_ImplicitConversion, 5456 /// \brief A C-style cast. 5457 CCK_CStyleCast, 5458 /// \brief A functional-style cast. 5459 CCK_FunctionalCast, 5460 /// \brief A cast other than a C-style cast. 5461 CCK_OtherCast 5462 }; 5463 5464 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5465 /// cast. If there is already an implicit cast, merge into the existing one. 5466 /// If isLvalue, the result of the cast is an lvalue. 5467 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5468 ExprValueKind VK = VK_RValue, 5469 const CXXCastPath *BasePath = 0, 5470 CheckedConversionKind CCK 5471 = CCK_ImplicitConversion); 5472 5473 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5474 /// to the conversion from scalar type ScalarTy to the Boolean type. 5475 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5476 5477 /// IgnoredValueConversions - Given that an expression's result is 5478 /// syntactically ignored, perform any conversions that are 5479 /// required. 5480 ExprResult IgnoredValueConversions(Expr *E); 5481 5482 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5483 // functions and arrays to their respective pointers (C99 6.3.2.1). 5484 ExprResult UsualUnaryConversions(Expr *E); 5485 5486 // DefaultFunctionArrayConversion - converts functions and arrays 5487 // to their respective pointers (C99 6.3.2.1). 5488 ExprResult DefaultFunctionArrayConversion(Expr *E); 5489 5490 // DefaultFunctionArrayLvalueConversion - converts functions and 5491 // arrays to their respective pointers and performs the 5492 // lvalue-to-rvalue conversion. 5493 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5494 5495 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5496 // the operand. This is DefaultFunctionArrayLvalueConversion, 5497 // except that it assumes the operand isn't of function or array 5498 // type. 5499 ExprResult DefaultLvalueConversion(Expr *E); 5500 5501 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5502 // do not have a prototype. Integer promotions are performed on each 5503 // argument, and arguments that have type float are promoted to double. 5504 ExprResult DefaultArgumentPromotion(Expr *E); 5505 5506 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5507 enum VariadicCallType { 5508 VariadicFunction, 5509 VariadicBlock, 5510 VariadicMethod, 5511 VariadicConstructor, 5512 VariadicDoesNotApply 5513 }; 5514 5515 /// GatherArgumentsForCall - Collector argument expressions for various 5516 /// form of call prototypes. 5517 bool GatherArgumentsForCall(SourceLocation CallLoc, 5518 FunctionDecl *FDecl, 5519 const FunctionProtoType *Proto, 5520 unsigned FirstProtoArg, 5521 Expr **Args, unsigned NumArgs, 5522 SmallVector<Expr *, 8> &AllArgs, 5523 VariadicCallType CallType = VariadicDoesNotApply); 5524 5525 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5526 // will warn if the resulting type is not a POD type. 5527 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5528 FunctionDecl *FDecl); 5529 5530 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5531 // operands and then handles various conversions that are common to binary 5532 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5533 // routine returns the first non-arithmetic type found. The client is 5534 // responsible for emitting appropriate error diagnostics. 5535 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5536 bool IsCompAssign = false); 5537 5538 /// AssignConvertType - All of the 'assignment' semantic checks return this 5539 /// enum to indicate whether the assignment was allowed. These checks are 5540 /// done for simple assignments, as well as initialization, return from 5541 /// function, argument passing, etc. The query is phrased in terms of a 5542 /// source and destination type. 5543 enum AssignConvertType { 5544 /// Compatible - the types are compatible according to the standard. 5545 Compatible, 5546 5547 /// PointerToInt - The assignment converts a pointer to an int, which we 5548 /// accept as an extension. 5549 PointerToInt, 5550 5551 /// IntToPointer - The assignment converts an int to a pointer, which we 5552 /// accept as an extension. 5553 IntToPointer, 5554 5555 /// FunctionVoidPointer - The assignment is between a function pointer and 5556 /// void*, which the standard doesn't allow, but we accept as an extension. 5557 FunctionVoidPointer, 5558 5559 /// IncompatiblePointer - The assignment is between two pointers types that 5560 /// are not compatible, but we accept them as an extension. 5561 IncompatiblePointer, 5562 5563 /// IncompatiblePointer - The assignment is between two pointers types which 5564 /// point to integers which have a different sign, but are otherwise identical. 5565 /// This is a subset of the above, but broken out because it's by far the most 5566 /// common case of incompatible pointers. 5567 IncompatiblePointerSign, 5568 5569 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5570 /// c/v/r qualifiers, which we accept as an extension. 5571 CompatiblePointerDiscardsQualifiers, 5572 5573 /// IncompatiblePointerDiscardsQualifiers - The assignment 5574 /// discards qualifiers that we don't permit to be discarded, 5575 /// like address spaces. 5576 IncompatiblePointerDiscardsQualifiers, 5577 5578 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5579 /// nested pointer types, and the qualifiers other than the first two 5580 /// levels differ e.g. char ** -> const char **, but we accept them as an 5581 /// extension. 5582 IncompatibleNestedPointerQualifiers, 5583 5584 /// IncompatibleVectors - The assignment is between two vector types that 5585 /// have the same size, which we accept as an extension. 5586 IncompatibleVectors, 5587 5588 /// IntToBlockPointer - The assignment converts an int to a block 5589 /// pointer. We disallow this. 5590 IntToBlockPointer, 5591 5592 /// IncompatibleBlockPointer - The assignment is between two block 5593 /// pointers types that are not compatible. 5594 IncompatibleBlockPointer, 5595 5596 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5597 /// id type and something else (that is incompatible with it). For example, 5598 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5599 IncompatibleObjCQualifiedId, 5600 5601 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5602 /// object with __weak qualifier. 5603 IncompatibleObjCWeakRef, 5604 5605 /// Incompatible - We reject this conversion outright, it is invalid to 5606 /// represent it in the AST. 5607 Incompatible 5608 }; 5609 5610 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5611 /// assignment conversion type specified by ConvTy. This returns true if the 5612 /// conversion was invalid or false if the conversion was accepted. 5613 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5614 SourceLocation Loc, 5615 QualType DstType, QualType SrcType, 5616 Expr *SrcExpr, AssignmentAction Action, 5617 bool *Complained = 0); 5618 5619 /// CheckAssignmentConstraints - Perform type checking for assignment, 5620 /// argument passing, variable initialization, and function return values. 5621 /// C99 6.5.16. 5622 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5623 QualType LHSType, 5624 QualType RHSType); 5625 5626 /// Check assignment constraints and prepare for a conversion of the 5627 /// RHS to the LHS type. 5628 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5629 ExprResult &RHS, 5630 CastKind &Kind); 5631 5632 // CheckSingleAssignmentConstraints - Currently used by 5633 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5634 // this routine performs the default function/array converions. 5635 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5636 ExprResult &RHS, 5637 bool Diagnose = true); 5638 5639 // \brief If the lhs type is a transparent union, check whether we 5640 // can initialize the transparent union with the given expression. 5641 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5642 ExprResult &RHS); 5643 5644 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5645 5646 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5647 5648 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5649 AssignmentAction Action, 5650 bool AllowExplicit = false, 5651 bool Diagnose = true); 5652 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5653 AssignmentAction Action, 5654 bool AllowExplicit, 5655 ImplicitConversionSequence& ICS, 5656 bool Diagnose = true); 5657 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5658 const ImplicitConversionSequence& ICS, 5659 AssignmentAction Action, 5660 CheckedConversionKind CCK 5661 = CCK_ImplicitConversion); 5662 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5663 const StandardConversionSequence& SCS, 5664 AssignmentAction Action, 5665 CheckedConversionKind CCK); 5666 5667 /// the following "Check" methods will return a valid/converted QualType 5668 /// or a null QualType (indicating an error diagnostic was issued). 5669 5670 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5671 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5672 ExprResult &RHS); 5673 QualType CheckPointerToMemberOperands( // C++ 5.5 5674 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5675 SourceLocation OpLoc, bool isIndirect); 5676 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5677 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5678 bool IsDivide); 5679 QualType CheckRemainderOperands( // C99 6.5.5 5680 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5681 bool IsCompAssign = false); 5682 QualType CheckAdditionOperands( // C99 6.5.6 5683 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5684 QualType* CompLHSTy = 0); 5685 QualType CheckSubtractionOperands( // C99 6.5.6 5686 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5687 QualType* CompLHSTy = 0); 5688 QualType CheckShiftOperands( // C99 6.5.7 5689 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5690 bool IsCompAssign = false); 5691 QualType CheckCompareOperands( // C99 6.5.8/9 5692 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5693 bool isRelational); 5694 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5695 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5696 bool IsCompAssign = false); 5697 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5698 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5699 // CheckAssignmentOperands is used for both simple and compound assignment. 5700 // For simple assignment, pass both expressions and a null converted type. 5701 // For compound assignment, pass both expressions and the converted type. 5702 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5703 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5704 5705 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, 5706 QualType& LHSTy); 5707 ExprResult ConvertPropertyForRValue(Expr *E); 5708 5709 QualType CheckConditionalOperands( // C99 6.5.15 5710 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5711 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5712 QualType CXXCheckConditionalOperands( // C++ 5.16 5713 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5714 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5715 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5716 bool *NonStandardCompositeType = 0); 5717 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5718 bool *NonStandardCompositeType = 0) { 5719 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5720 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5721 E1 = Owned(E1Tmp); 5722 E2 = Owned(E2Tmp); 5723 return Composite; 5724 } 5725 5726 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5727 SourceLocation QuestionLoc); 5728 5729 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5730 SourceLocation QuestionLoc); 5731 5732 /// type checking for vector binary operators. 5733 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5734 SourceLocation Loc, bool IsCompAssign); 5735 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5736 SourceLocation Loc, bool isRelational); 5737 5738 /// type checking declaration initializers (C99 6.7.8) 5739 bool CheckForConstantInitializer(Expr *e, QualType t); 5740 5741 // type checking C++ declaration initializers (C++ [dcl.init]). 5742 5743 /// ReferenceCompareResult - Expresses the result of comparing two 5744 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5745 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5746 enum ReferenceCompareResult { 5747 /// Ref_Incompatible - The two types are incompatible, so direct 5748 /// reference binding is not possible. 5749 Ref_Incompatible = 0, 5750 /// Ref_Related - The two types are reference-related, which means 5751 /// that their unqualified forms (T1 and T2) are either the same 5752 /// or T1 is a base class of T2. 5753 Ref_Related, 5754 /// Ref_Compatible_With_Added_Qualification - The two types are 5755 /// reference-compatible with added qualification, meaning that 5756 /// they are reference-compatible and the qualifiers on T1 (cv1) 5757 /// are greater than the qualifiers on T2 (cv2). 5758 Ref_Compatible_With_Added_Qualification, 5759 /// Ref_Compatible - The two types are reference-compatible and 5760 /// have equivalent qualifiers (cv1 == cv2). 5761 Ref_Compatible 5762 }; 5763 5764 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5765 QualType T1, QualType T2, 5766 bool &DerivedToBase, 5767 bool &ObjCConversion, 5768 bool &ObjCLifetimeConversion); 5769 5770 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5771 Expr *CastExpr, CastKind &CastKind, 5772 ExprValueKind &VK, CXXCastPath &Path); 5773 5774 // CheckVectorCast - check type constraints for vectors. 5775 // Since vectors are an extension, there are no C standard reference for this. 5776 // We allow casting between vectors and integer datatypes of the same size. 5777 // returns true if the cast is invalid 5778 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5779 CastKind &Kind); 5780 5781 // CheckExtVectorCast - check type constraints for extended vectors. 5782 // Since vectors are an extension, there are no C standard reference for this. 5783 // We allow casting between vectors and integer datatypes of the same size, 5784 // or vectors and the element type of that vector. 5785 // returns the cast expr 5786 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5787 CastKind &Kind); 5788 5789 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 5790 SourceLocation LParenLoc, 5791 Expr *CastExpr, 5792 SourceLocation RParenLoc); 5793 5794 /// \brief Checks for invalid conversions and casts between 5795 /// retainable pointers and other pointer kinds. 5796 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5797 Expr *&op, CheckedConversionKind CCK); 5798 5799 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5800 QualType ExprType); 5801 5802 /// checkRetainCycles - Check whether an Objective-C message send 5803 /// might create an obvious retain cycle. 5804 void checkRetainCycles(ObjCMessageExpr *msg); 5805 void checkRetainCycles(Expr *receiver, Expr *argument); 5806 5807 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5808 /// to weak/__unsafe_unretained type. 5809 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5810 5811 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5812 /// to weak/__unsafe_unretained expression. 5813 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5814 5815 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5816 /// \param Method - May be null. 5817 /// \param [out] ReturnType - The return type of the send. 5818 /// \return true iff there were any incompatible types. 5819 bool CheckMessageArgumentTypes(QualType ReceiverType, 5820 Expr **Args, unsigned NumArgs, Selector Sel, 5821 ObjCMethodDecl *Method, bool isClassMessage, 5822 bool isSuperMessage, 5823 SourceLocation lbrac, SourceLocation rbrac, 5824 QualType &ReturnType, ExprValueKind &VK); 5825 5826 /// \brief Determine the result of a message send expression based on 5827 /// the type of the receiver, the method expected to receive the message, 5828 /// and the form of the message send. 5829 QualType getMessageSendResultType(QualType ReceiverType, 5830 ObjCMethodDecl *Method, 5831 bool isClassMessage, bool isSuperMessage); 5832 5833 /// \brief If the given expression involves a message send to a method 5834 /// with a related result type, emit a note describing what happened. 5835 void EmitRelatedResultTypeNote(const Expr *E); 5836 5837 /// CheckBooleanCondition - Diagnose problems involving the use of 5838 /// the given expression as a boolean condition (e.g. in an if 5839 /// statement). Also performs the standard function and array 5840 /// decays, possibly changing the input variable. 5841 /// 5842 /// \param Loc - A location associated with the condition, e.g. the 5843 /// 'if' keyword. 5844 /// \return true iff there were any errors 5845 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5846 5847 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5848 Expr *SubExpr); 5849 5850 /// DiagnoseAssignmentAsCondition - Given that an expression is 5851 /// being used as a boolean condition, warn if it's an assignment. 5852 void DiagnoseAssignmentAsCondition(Expr *E); 5853 5854 /// \brief Redundant parentheses over an equality comparison can indicate 5855 /// that the user intended an assignment used as condition. 5856 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5857 5858 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5859 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5860 5861 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5862 /// the specified width and sign. If an overflow occurs, detect it and emit 5863 /// the specified diagnostic. 5864 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5865 unsigned NewWidth, bool NewSign, 5866 SourceLocation Loc, unsigned DiagID); 5867 5868 /// Checks that the Objective-C declaration is declared in the global scope. 5869 /// Emits an error and marks the declaration as invalid if it's not declared 5870 /// in the global scope. 5871 bool CheckObjCDeclScope(Decl *D); 5872 5873 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5874 /// and reports the appropriate diagnostics. Returns false on success. 5875 /// Can optionally return the value of the expression. 5876 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5877 5878 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5879 /// the correct width, and that the field type is valid. 5880 /// Returns false on success. 5881 /// Can optionally return whether the bit-field is of width 0 5882 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5883 QualType FieldTy, const Expr *BitWidth, 5884 bool *ZeroWidth = 0); 5885 5886 enum CUDAFunctionTarget { 5887 CFT_Device, 5888 CFT_Global, 5889 CFT_Host, 5890 CFT_HostDevice 5891 }; 5892 5893 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 5894 5895 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 5896 CUDAFunctionTarget CalleeTarget); 5897 5898 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 5899 return CheckCUDATarget(IdentifyCUDATarget(Caller), 5900 IdentifyCUDATarget(Callee)); 5901 } 5902 5903 /// \name Code completion 5904 //@{ 5905 /// \brief Describes the context in which code completion occurs. 5906 enum ParserCompletionContext { 5907 /// \brief Code completion occurs at top-level or namespace context. 5908 PCC_Namespace, 5909 /// \brief Code completion occurs within a class, struct, or union. 5910 PCC_Class, 5911 /// \brief Code completion occurs within an Objective-C interface, protocol, 5912 /// or category. 5913 PCC_ObjCInterface, 5914 /// \brief Code completion occurs within an Objective-C implementation or 5915 /// category implementation 5916 PCC_ObjCImplementation, 5917 /// \brief Code completion occurs within the list of instance variables 5918 /// in an Objective-C interface, protocol, category, or implementation. 5919 PCC_ObjCInstanceVariableList, 5920 /// \brief Code completion occurs following one or more template 5921 /// headers. 5922 PCC_Template, 5923 /// \brief Code completion occurs following one or more template 5924 /// headers within a class. 5925 PCC_MemberTemplate, 5926 /// \brief Code completion occurs within an expression. 5927 PCC_Expression, 5928 /// \brief Code completion occurs within a statement, which may 5929 /// also be an expression or a declaration. 5930 PCC_Statement, 5931 /// \brief Code completion occurs at the beginning of the 5932 /// initialization statement (or expression) in a for loop. 5933 PCC_ForInit, 5934 /// \brief Code completion occurs within the condition of an if, 5935 /// while, switch, or for statement. 5936 PCC_Condition, 5937 /// \brief Code completion occurs within the body of a function on a 5938 /// recovery path, where we do not have a specific handle on our position 5939 /// in the grammar. 5940 PCC_RecoveryInFunction, 5941 /// \brief Code completion occurs where only a type is permitted. 5942 PCC_Type, 5943 /// \brief Code completion occurs in a parenthesized expression, which 5944 /// might also be a type cast. 5945 PCC_ParenthesizedExpression, 5946 /// \brief Code completion occurs within a sequence of declaration 5947 /// specifiers within a function, method, or block. 5948 PCC_LocalDeclarationSpecifiers 5949 }; 5950 5951 void CodeCompleteOrdinaryName(Scope *S, 5952 ParserCompletionContext CompletionContext); 5953 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5954 bool AllowNonIdentifiers, 5955 bool AllowNestedNameSpecifiers); 5956 5957 struct CodeCompleteExpressionData; 5958 void CodeCompleteExpression(Scope *S, 5959 const CodeCompleteExpressionData &Data); 5960 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5961 SourceLocation OpLoc, 5962 bool IsArrow); 5963 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5964 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5965 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5966 void CodeCompleteCase(Scope *S); 5967 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5968 void CodeCompleteInitializer(Scope *S, Decl *D); 5969 void CodeCompleteReturn(Scope *S); 5970 void CodeCompleteAfterIf(Scope *S); 5971 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5972 5973 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5974 bool EnteringContext); 5975 void CodeCompleteUsing(Scope *S); 5976 void CodeCompleteUsingDirective(Scope *S); 5977 void CodeCompleteNamespaceDecl(Scope *S); 5978 void CodeCompleteNamespaceAliasDecl(Scope *S); 5979 void CodeCompleteOperatorName(Scope *S); 5980 void CodeCompleteConstructorInitializer(Decl *Constructor, 5981 CXXCtorInitializer** Initializers, 5982 unsigned NumInitializers); 5983 5984 void CodeCompleteObjCAtDirective(Scope *S); 5985 void CodeCompleteObjCAtVisibility(Scope *S); 5986 void CodeCompleteObjCAtStatement(Scope *S); 5987 void CodeCompleteObjCAtExpression(Scope *S); 5988 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5989 void CodeCompleteObjCPropertyGetter(Scope *S); 5990 void CodeCompleteObjCPropertySetter(Scope *S); 5991 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5992 bool IsParameter); 5993 void CodeCompleteObjCMessageReceiver(Scope *S); 5994 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5995 IdentifierInfo **SelIdents, 5996 unsigned NumSelIdents, 5997 bool AtArgumentExpression); 5998 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5999 IdentifierInfo **SelIdents, 6000 unsigned NumSelIdents, 6001 bool AtArgumentExpression, 6002 bool IsSuper = false); 6003 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6004 IdentifierInfo **SelIdents, 6005 unsigned NumSelIdents, 6006 bool AtArgumentExpression, 6007 ObjCInterfaceDecl *Super = 0); 6008 void CodeCompleteObjCForCollection(Scope *S, 6009 DeclGroupPtrTy IterationVar); 6010 void CodeCompleteObjCSelector(Scope *S, 6011 IdentifierInfo **SelIdents, 6012 unsigned NumSelIdents); 6013 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6014 unsigned NumProtocols); 6015 void CodeCompleteObjCProtocolDecl(Scope *S); 6016 void CodeCompleteObjCInterfaceDecl(Scope *S); 6017 void CodeCompleteObjCSuperclass(Scope *S, 6018 IdentifierInfo *ClassName, 6019 SourceLocation ClassNameLoc); 6020 void CodeCompleteObjCImplementationDecl(Scope *S); 6021 void CodeCompleteObjCInterfaceCategory(Scope *S, 6022 IdentifierInfo *ClassName, 6023 SourceLocation ClassNameLoc); 6024 void CodeCompleteObjCImplementationCategory(Scope *S, 6025 IdentifierInfo *ClassName, 6026 SourceLocation ClassNameLoc); 6027 void CodeCompleteObjCPropertyDefinition(Scope *S); 6028 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6029 IdentifierInfo *PropertyName); 6030 void CodeCompleteObjCMethodDecl(Scope *S, 6031 bool IsInstanceMethod, 6032 ParsedType ReturnType); 6033 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6034 bool IsInstanceMethod, 6035 bool AtParameterName, 6036 ParsedType ReturnType, 6037 IdentifierInfo **SelIdents, 6038 unsigned NumSelIdents); 6039 void CodeCompletePreprocessorDirective(bool InConditional); 6040 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6041 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6042 void CodeCompletePreprocessorExpression(); 6043 void CodeCompletePreprocessorMacroArgument(Scope *S, 6044 IdentifierInfo *Macro, 6045 MacroInfo *MacroInfo, 6046 unsigned Argument); 6047 void CodeCompleteNaturalLanguage(); 6048 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6049 SmallVectorImpl<CodeCompletionResult> &Results); 6050 //@} 6051 6052 //===--------------------------------------------------------------------===// 6053 // Extra semantic analysis beyond the C type system 6054 6055public: 6056 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6057 unsigned ByteNo) const; 6058 6059private: 6060 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6061 bool isSubscript=false, bool AllowOnePastEnd=true); 6062 void CheckArrayAccess(const Expr *E); 6063 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6064 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6065 6066 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6067 bool CheckObjCString(Expr *Arg); 6068 6069 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6070 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6071 6072 bool SemaBuiltinVAStart(CallExpr *TheCall); 6073 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6074 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6075 6076public: 6077 // Used by C++ template instantiation. 6078 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6079 6080private: 6081 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6082 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6083 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6084 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6085 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6086 AtomicExpr::AtomicOp Op); 6087 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6088 llvm::APSInt &Result); 6089 6090 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6091 bool HasVAListArg, unsigned format_idx, 6092 unsigned firstDataArg, bool isPrintf); 6093 6094 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6095 const CallExpr *TheCall, bool HasVAListArg, 6096 unsigned format_idx, unsigned firstDataArg, 6097 bool isPrintf); 6098 6099 void CheckNonNullArguments(const NonNullAttr *NonNull, 6100 const Expr * const *ExprArgs, 6101 SourceLocation CallSiteLoc); 6102 6103 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6104 unsigned format_idx, unsigned firstDataArg, 6105 bool isPrintf); 6106 6107 /// \brief Enumeration used to describe which of the memory setting or copying 6108 /// functions is being checked by \c CheckMemaccessArguments(). 6109 enum CheckedMemoryFunction { 6110 CMF_Memset, 6111 CMF_Memcpy, 6112 CMF_Memmove, 6113 CMF_Memcmp 6114 }; 6115 6116 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6117 IdentifierInfo *FnName); 6118 6119 void CheckStrlcpycatArguments(const CallExpr *Call, 6120 IdentifierInfo *FnName); 6121 6122 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6123 SourceLocation ReturnLoc); 6124 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6125 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6126 6127 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6128 Expr *Init); 6129 6130 /// \brief The parser's current scope. 6131 /// 6132 /// The parser maintains this state here. 6133 Scope *CurScope; 6134 6135protected: 6136 friend class Parser; 6137 friend class InitializationSequence; 6138 friend class ASTReader; 6139 friend class ASTWriter; 6140 6141public: 6142 /// \brief Retrieve the parser's current scope. 6143 /// 6144 /// This routine must only be used when it is certain that semantic analysis 6145 /// and the parser are in precisely the same context, which is not the case 6146 /// when, e.g., we are performing any kind of template instantiation. 6147 /// Therefore, the only safe places to use this scope are in the parser 6148 /// itself and in routines directly invoked from the parser and *never* from 6149 /// template substitution or instantiation. 6150 Scope *getCurScope() const { return CurScope; } 6151 6152 Decl *getObjCDeclContext() const; 6153 6154 DeclContext *getCurLexicalContext() const { 6155 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6156 } 6157 6158 AvailabilityResult getCurContextAvailability() const; 6159}; 6160 6161/// \brief RAII object that enters a new expression evaluation context. 6162class EnterExpressionEvaluationContext { 6163 Sema &Actions; 6164 6165public: 6166 EnterExpressionEvaluationContext(Sema &Actions, 6167 Sema::ExpressionEvaluationContext NewContext) 6168 : Actions(Actions) { 6169 Actions.PushExpressionEvaluationContext(NewContext); 6170 } 6171 6172 ~EnterExpressionEvaluationContext() { 6173 Actions.PopExpressionEvaluationContext(); 6174 } 6175}; 6176 6177} // end namespace clang 6178 6179#endif 6180