Sema.h revision 1af83c444e5a2f6f50a6e1c15e6ebc618ae18a5f
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/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/ExprObjC.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/AST/NSAPI.h" 33#include "clang/Lex/ModuleLoader.h" 34#include "clang/Basic/Specifiers.h" 35#include "clang/Basic/TemplateKinds.h" 36#include "clang/Basic/TypeTraits.h" 37#include "clang/Basic/ExpressionTraits.h" 38#include "llvm/ADT/ArrayRef.h" 39#include "llvm/ADT/OwningPtr.h" 40#include "llvm/ADT/SmallPtrSet.h" 41#include "llvm/ADT/SmallVector.h" 42#include <deque> 43#include <string> 44 45namespace llvm { 46 class APSInt; 47 template <typename ValueT> struct DenseMapInfo; 48 template <typename ValueT, typename ValueInfoT> class DenseSet; 49 class SmallBitVector; 50} 51 52namespace clang { 53 class ADLResult; 54 class ASTConsumer; 55 class ASTContext; 56 class ASTMutationListener; 57 class ASTReader; 58 class ASTWriter; 59 class ArrayType; 60 class AttributeList; 61 class BlockDecl; 62 class CXXBasePath; 63 class CXXBasePaths; 64 class CXXBindTemporaryExpr; 65 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 66 class CXXConstructorDecl; 67 class CXXConversionDecl; 68 class CXXDestructorDecl; 69 class CXXFieldCollector; 70 class CXXMemberCallExpr; 71 class CXXMethodDecl; 72 class CXXScopeSpec; 73 class CXXTemporary; 74 class CXXTryStmt; 75 class CallExpr; 76 class ClassTemplateDecl; 77 class ClassTemplatePartialSpecializationDecl; 78 class ClassTemplateSpecializationDecl; 79 class CodeCompleteConsumer; 80 class CodeCompletionAllocator; 81 class CodeCompletionResult; 82 class Decl; 83 class DeclAccessPair; 84 class DeclContext; 85 class DeclRefExpr; 86 class DeclaratorDecl; 87 class DeducedTemplateArgument; 88 class DependentDiagnostic; 89 class DesignatedInitExpr; 90 class Designation; 91 class EnumConstantDecl; 92 class Expr; 93 class ExtVectorType; 94 class ExternalSemaSource; 95 class FormatAttr; 96 class FriendDecl; 97 class FunctionDecl; 98 class FunctionProtoType; 99 class FunctionTemplateDecl; 100 class ImplicitConversionSequence; 101 class InitListExpr; 102 class InitializationKind; 103 class InitializationSequence; 104 class InitializedEntity; 105 class IntegerLiteral; 106 class LabelStmt; 107 class LambdaExpr; 108 class LangOptions; 109 class LocalInstantiationScope; 110 class LookupResult; 111 class MacroInfo; 112 class MultiLevelTemplateArgumentList; 113 class NamedDecl; 114 class NonNullAttr; 115 class ObjCCategoryDecl; 116 class ObjCCategoryImplDecl; 117 class ObjCCompatibleAliasDecl; 118 class ObjCContainerDecl; 119 class ObjCImplDecl; 120 class ObjCImplementationDecl; 121 class ObjCInterfaceDecl; 122 class ObjCIvarDecl; 123 template <class T> class ObjCList; 124 class ObjCMessageExpr; 125 class ObjCMethodDecl; 126 class ObjCPropertyDecl; 127 class ObjCProtocolDecl; 128 class OverloadCandidateSet; 129 class OverloadExpr; 130 class ParenListExpr; 131 class ParmVarDecl; 132 class Preprocessor; 133 class PseudoDestructorTypeStorage; 134 class PseudoObjectExpr; 135 class QualType; 136 class StandardConversionSequence; 137 class Stmt; 138 class StringLiteral; 139 class SwitchStmt; 140 class TargetAttributesSema; 141 class TemplateArgument; 142 class TemplateArgumentList; 143 class TemplateArgumentLoc; 144 class TemplateDecl; 145 class TemplateParameterList; 146 class TemplatePartialOrderingContext; 147 class TemplateTemplateParmDecl; 148 class Token; 149 class TypeAliasDecl; 150 class TypedefDecl; 151 class TypedefNameDecl; 152 class TypeLoc; 153 class UnqualifiedId; 154 class UnresolvedLookupExpr; 155 class UnresolvedMemberExpr; 156 class UnresolvedSetImpl; 157 class UnresolvedSetIterator; 158 class UsingDecl; 159 class UsingShadowDecl; 160 class ValueDecl; 161 class VarDecl; 162 class VisibilityAttr; 163 class VisibleDeclConsumer; 164 class IndirectFieldDecl; 165 166namespace sema { 167 class AccessedEntity; 168 class BlockScopeInfo; 169 class CompoundScopeInfo; 170 class DelayedDiagnostic; 171 class FunctionScopeInfo; 172 class LambdaScopeInfo; 173 class PossiblyUnreachableDiag; 174 class TemplateDeductionInfo; 175} 176 177// FIXME: No way to easily map from TemplateTypeParmTypes to 178// TemplateTypeParmDecls, so we have this horrible PointerUnion. 179typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 180 SourceLocation> UnexpandedParameterPack; 181 182/// Sema - This implements semantic analysis and AST building for C. 183class Sema { 184 Sema(const Sema&); // DO NOT IMPLEMENT 185 void operator=(const Sema&); // DO NOT IMPLEMENT 186 mutable const TargetAttributesSema* TheTargetAttributesSema; 187public: 188 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 189 typedef OpaquePtr<TemplateName> TemplateTy; 190 typedef OpaquePtr<QualType> TypeTy; 191 192 OpenCLOptions OpenCLFeatures; 193 FPOptions FPFeatures; 194 195 const LangOptions &LangOpts; 196 Preprocessor &PP; 197 ASTContext &Context; 198 ASTConsumer &Consumer; 199 DiagnosticsEngine &Diags; 200 SourceManager &SourceMgr; 201 202 /// \brief Flag indicating whether or not to collect detailed statistics. 203 bool CollectStats; 204 205 /// \brief Source of additional semantic information. 206 ExternalSemaSource *ExternalSource; 207 208 /// \brief Code-completion consumer. 209 CodeCompleteConsumer *CodeCompleter; 210 211 /// CurContext - This is the current declaration context of parsing. 212 DeclContext *CurContext; 213 214 /// \brief Generally null except when we temporarily switch decl contexts, 215 /// like in \see ActOnObjCTemporaryExitContainerContext. 216 DeclContext *OriginalLexicalContext; 217 218 /// VAListTagName - The declaration name corresponding to __va_list_tag. 219 /// This is used as part of a hack to omit that class from ADL results. 220 DeclarationName VAListTagName; 221 222 /// PackContext - Manages the stack for #pragma pack. An alignment 223 /// of 0 indicates default alignment. 224 void *PackContext; // Really a "PragmaPackStack*" 225 226 bool MSStructPragmaOn; // True when #pragma ms_struct on 227 228 /// VisContext - Manages the stack for #pragma GCC visibility. 229 void *VisContext; // Really a "PragmaVisStack*" 230 231 /// ExprNeedsCleanups - True if the current evaluation context 232 /// requires cleanups to be run at its conclusion. 233 bool ExprNeedsCleanups; 234 235 /// ExprCleanupObjects - This is the stack of objects requiring 236 /// cleanup that are created by the current full expression. The 237 /// element type here is ExprWithCleanups::Object. 238 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 239 240 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 241 242 /// \brief Stack containing information about each of the nested 243 /// function, block, and method scopes that are currently active. 244 /// 245 /// This array is never empty. Clients should ignore the first 246 /// element, which is used to cache a single FunctionScopeInfo 247 /// that's used to parse every top-level function. 248 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 249 250 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 251 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 252 ExtVectorDeclsType; 253 254 /// ExtVectorDecls - This is a list all the extended vector types. This allows 255 /// us to associate a raw vector type with one of the ext_vector type names. 256 /// This is only necessary for issuing pretty diagnostics. 257 ExtVectorDeclsType ExtVectorDecls; 258 259 /// \brief The set of types for which we have already complained about the 260 /// definitions being hidden. 261 /// 262 /// This set is used to suppress redundant diagnostics. 263 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 264 265 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 266 OwningPtr<CXXFieldCollector> FieldCollector; 267 268 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 269 270 /// PureVirtualClassDiagSet - a set of class declarations which we have 271 /// emitted a list of pure virtual functions. Used to prevent emitting the 272 /// same list more than once. 273 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 274 275 /// ParsingInitForAutoVars - a set of declarations with auto types for which 276 /// we are currently parsing the initializer. 277 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 278 279 /// \brief A mapping from external names to the most recent 280 /// locally-scoped external declaration with that name. 281 /// 282 /// This map contains external declarations introduced in local 283 /// scoped, e.g., 284 /// 285 /// \code 286 /// void f() { 287 /// void foo(int, int); 288 /// } 289 /// \endcode 290 /// 291 /// Here, the name "foo" will be associated with the declaration on 292 /// "foo" within f. This name is not visible outside of 293 /// "f". However, we still find it in two cases: 294 /// 295 /// - If we are declaring another external with the name "foo", we 296 /// can find "foo" as a previous declaration, so that the types 297 /// of this external declaration can be checked for 298 /// compatibility. 299 /// 300 /// - If we would implicitly declare "foo" (e.g., due to a call to 301 /// "foo" in C when no prototype or definition is visible), then 302 /// we find this declaration of "foo" and complain that it is 303 /// not visible. 304 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 305 306 /// \brief Look for a locally scoped external declaration by the given name. 307 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 308 findLocallyScopedExternalDecl(DeclarationName Name); 309 310 typedef LazyVector<VarDecl *, ExternalSemaSource, 311 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 312 TentativeDefinitionsType; 313 314 /// \brief All the tentative definitions encountered in the TU. 315 TentativeDefinitionsType TentativeDefinitions; 316 317 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 318 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 319 UnusedFileScopedDeclsType; 320 321 /// \brief The set of file scoped decls seen so far that have not been used 322 /// and must warn if not used. Only contains the first declaration. 323 UnusedFileScopedDeclsType UnusedFileScopedDecls; 324 325 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 326 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 327 DelegatingCtorDeclsType; 328 329 /// \brief All the delegating constructors seen so far in the file, used for 330 /// cycle detection at the end of the TU. 331 DelegatingCtorDeclsType DelegatingCtorDecls; 332 333 /// \brief All the overriding destructors seen during a class definition 334 /// (there could be multiple due to nested classes) that had their exception 335 /// spec checks delayed, plus the overridden destructor. 336 SmallVector<std::pair<const CXXDestructorDecl*, 337 const CXXDestructorDecl*>, 2> 338 DelayedDestructorExceptionSpecChecks; 339 340 /// \brief Callback to the parser to parse templated functions when needed. 341 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 342 LateTemplateParserCB *LateTemplateParser; 343 void *OpaqueParser; 344 345 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 346 LateTemplateParser = LTP; 347 OpaqueParser = P; 348 } 349 350 class DelayedDiagnostics; 351 352 class ParsingDeclState { 353 unsigned SavedStackSize; 354 friend class Sema::DelayedDiagnostics; 355 }; 356 357 class ProcessingContextState { 358 unsigned SavedParsingDepth; 359 unsigned SavedActiveStackBase; 360 friend class Sema::DelayedDiagnostics; 361 }; 362 363 /// A class which encapsulates the logic for delaying diagnostics 364 /// during parsing and other processing. 365 class DelayedDiagnostics { 366 /// \brief The stack of diagnostics that were delayed due to being 367 /// produced during the parsing of a declaration. 368 sema::DelayedDiagnostic *Stack; 369 370 /// \brief The number of objects on the delayed-diagnostics stack. 371 unsigned StackSize; 372 373 /// \brief The current capacity of the delayed-diagnostics stack. 374 unsigned StackCapacity; 375 376 /// \brief The index of the first "active" delayed diagnostic in 377 /// the stack. When parsing class definitions, we ignore active 378 /// delayed diagnostics from the surrounding context. 379 unsigned ActiveStackBase; 380 381 /// \brief The depth of the declarations we're currently parsing. 382 /// This gets saved and reset whenever we enter a class definition. 383 unsigned ParsingDepth; 384 385 public: 386 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 387 ActiveStackBase(0), ParsingDepth(0) {} 388 389 ~DelayedDiagnostics() { 390 delete[] reinterpret_cast<char*>(Stack); 391 } 392 393 /// Adds a delayed diagnostic. 394 void add(const sema::DelayedDiagnostic &diag); 395 396 /// Determines whether diagnostics should be delayed. 397 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 398 399 /// Observe that we've started parsing a declaration. Access and 400 /// deprecation diagnostics will be delayed; when the declaration 401 /// is completed, all active delayed diagnostics will be evaluated 402 /// in its context, and then active diagnostics stack will be 403 /// popped down to the saved depth. 404 ParsingDeclState pushParsingDecl() { 405 ParsingDepth++; 406 407 ParsingDeclState state; 408 state.SavedStackSize = StackSize; 409 return state; 410 } 411 412 /// Observe that we're completed parsing a declaration. 413 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 414 415 /// Observe that we've started processing a different context, the 416 /// contents of which are semantically separate from the 417 /// declarations it may lexically appear in. This sets aside the 418 /// current stack of active diagnostics and starts afresh. 419 ProcessingContextState pushContext() { 420 assert(StackSize >= ActiveStackBase); 421 422 ProcessingContextState state; 423 state.SavedParsingDepth = ParsingDepth; 424 state.SavedActiveStackBase = ActiveStackBase; 425 426 ActiveStackBase = StackSize; 427 ParsingDepth = 0; 428 429 return state; 430 } 431 432 /// Observe that we've stopped processing a context. This 433 /// restores the previous stack of active diagnostics. 434 void popContext(ProcessingContextState state) { 435 assert(ActiveStackBase == StackSize); 436 assert(ParsingDepth == 0); 437 ActiveStackBase = state.SavedActiveStackBase; 438 ParsingDepth = state.SavedParsingDepth; 439 } 440 } DelayedDiagnostics; 441 442 /// A RAII object to temporarily push a declaration context. 443 class ContextRAII { 444 private: 445 Sema &S; 446 DeclContext *SavedContext; 447 ProcessingContextState SavedContextState; 448 449 public: 450 ContextRAII(Sema &S, DeclContext *ContextToPush) 451 : S(S), SavedContext(S.CurContext), 452 SavedContextState(S.DelayedDiagnostics.pushContext()) 453 { 454 assert(ContextToPush && "pushing null context"); 455 S.CurContext = ContextToPush; 456 } 457 458 void pop() { 459 if (!SavedContext) return; 460 S.CurContext = SavedContext; 461 S.DelayedDiagnostics.popContext(SavedContextState); 462 SavedContext = 0; 463 } 464 465 ~ContextRAII() { 466 pop(); 467 } 468 }; 469 470 /// WeakUndeclaredIdentifiers - Identifiers contained in 471 /// #pragma weak before declared. rare. may alias another 472 /// identifier, declared or undeclared 473 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 474 475 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 476 /// #pragma redefine_extname before declared. Used in Solaris system headers 477 /// to define functions that occur in multiple standards to call the version 478 /// in the currently selected standard. 479 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 480 481 482 /// \brief Load weak undeclared identifiers from the external source. 483 void LoadExternalWeakUndeclaredIdentifiers(); 484 485 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 486 /// #pragma weak during processing of other Decls. 487 /// I couldn't figure out a clean way to generate these in-line, so 488 /// we store them here and handle separately -- which is a hack. 489 /// It would be best to refactor this. 490 SmallVector<Decl*,2> WeakTopLevelDecl; 491 492 IdentifierResolver IdResolver; 493 494 /// Translation Unit Scope - useful to Objective-C actions that need 495 /// to lookup file scope declarations in the "ordinary" C decl namespace. 496 /// For example, user-defined classes, built-in "id" type, etc. 497 Scope *TUScope; 498 499 /// \brief The C++ "std" namespace, where the standard library resides. 500 LazyDeclPtr StdNamespace; 501 502 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 503 /// standard library. 504 LazyDeclPtr StdBadAlloc; 505 506 /// \brief The C++ "std::initializer_list" template, which is defined in 507 /// <initializer_list>. 508 ClassTemplateDecl *StdInitializerList; 509 510 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 511 RecordDecl *CXXTypeInfoDecl; 512 513 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 514 RecordDecl *MSVCGuidDecl; 515 516 /// \brief Caches identifiers/selectors for NSFoundation APIs. 517 llvm::OwningPtr<NSAPI> NSAPIObj; 518 519 /// \brief The declaration of the Objective-C NSNumber class. 520 ObjCInterfaceDecl *NSNumberDecl; 521 522 /// \brief The Objective-C NSNumber methods used to create NSNumber literals. 523 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]; 524 525 /// \brief The declaration of the Objective-C NSArray class. 526 ObjCInterfaceDecl *NSArrayDecl; 527 528 /// \brief The declaration of the arrayWithObjects:count: method. 529 ObjCMethodDecl *ArrayWithObjectsMethod; 530 531 /// \brief The declaration of the Objective-C NSDictionary class. 532 ObjCInterfaceDecl *NSDictionaryDecl; 533 534 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method. 535 ObjCMethodDecl *DictionaryWithObjectsMethod; 536 537 /// \brief id<NSCopying> type. 538 QualType QIDNSCopying; 539 540 /// A flag to remember whether the implicit forms of operator new and delete 541 /// have been declared. 542 bool GlobalNewDeleteDeclared; 543 544 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 545 /// call was found yet. 546 bool ObjCShouldCallSuperDealloc; 547 /// A flag that is set when parsing a -finalize method and no [super finalize] 548 /// call was found yet. 549 bool ObjCShouldCallSuperFinalize; 550 551 /// \brief Describes how the expressions currently being parsed are 552 /// evaluated at run-time, if at all. 553 enum ExpressionEvaluationContext { 554 /// \brief The current expression and its subexpressions occur within an 555 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 556 /// \c sizeof, where the type of the expression may be significant but 557 /// no code will be generated to evaluate the value of the expression at 558 /// run time. 559 Unevaluated, 560 561 /// \brief The current context is "potentially evaluated" in C++11 terms, 562 /// but the expression is evaluated at compile-time (like the values of 563 /// cases in a switch statment). 564 ConstantEvaluated, 565 566 /// \brief The current expression is potentially evaluated at run time, 567 /// which means that code may be generated to evaluate the value of the 568 /// expression at run time. 569 PotentiallyEvaluated, 570 571 /// \brief The current expression is potentially evaluated, but any 572 /// declarations referenced inside that expression are only used if 573 /// in fact the current expression is used. 574 /// 575 /// This value is used when parsing default function arguments, for which 576 /// we would like to provide diagnostics (e.g., passing non-POD arguments 577 /// through varargs) but do not want to mark declarations as "referenced" 578 /// until the default argument is used. 579 PotentiallyEvaluatedIfUsed 580 }; 581 582 /// \brief Data structure used to record current or nested 583 /// expression evaluation contexts. 584 struct ExpressionEvaluationContextRecord { 585 /// \brief The expression evaluation context. 586 ExpressionEvaluationContext Context; 587 588 /// \brief Whether the enclosing context needed a cleanup. 589 bool ParentNeedsCleanups; 590 591 /// \brief Whether we are in a decltype expression. 592 bool IsDecltype; 593 594 /// \brief The number of active cleanup objects when we entered 595 /// this expression evaluation context. 596 unsigned NumCleanupObjects; 597 598 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 599 600 /// \brief The lambdas that are present within this context, if it 601 /// is indeed an unevaluated context. 602 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 603 604 /// \brief The declaration that provides context for the lambda expression 605 /// if the normal declaration context does not suffice, e.g., in a 606 /// default function argument. 607 Decl *LambdaContextDecl; 608 609 /// \brief The context information used to mangle lambda expressions 610 /// within this context. 611 /// 612 /// This mangling information is allocated lazily, since most contexts 613 /// do not have lambda expressions. 614 LambdaMangleContext *LambdaMangle; 615 616 /// \brief If we are processing a decltype type, a set of call expressions 617 /// for which we have deferred checking the completeness of the return type. 618 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls; 619 620 /// \brief If we are processing a decltype type, a set of temporary binding 621 /// expressions for which we have deferred checking the destructor. 622 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds; 623 624 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 625 unsigned NumCleanupObjects, 626 bool ParentNeedsCleanups, 627 Decl *LambdaContextDecl, 628 bool IsDecltype) 629 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 630 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 631 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 632 633 ~ExpressionEvaluationContextRecord() { 634 delete LambdaMangle; 635 } 636 637 /// \brief Retrieve the mangling context for lambdas. 638 LambdaMangleContext &getLambdaMangleContext() { 639 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 640 if (!LambdaMangle) 641 LambdaMangle = new LambdaMangleContext; 642 return *LambdaMangle; 643 } 644 }; 645 646 /// A stack of expression evaluation contexts. 647 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 648 649 /// SpecialMemberOverloadResult - The overloading result for a special member 650 /// function. 651 /// 652 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 653 /// integer is used to determine whether we have a parameter qualification 654 /// match, the second-lowest is whether we had success in resolving the 655 /// overload to a unique non-deleted function. 656 /// 657 /// The ConstParamMatch bit represents whether, when looking up a copy 658 /// constructor or assignment operator, we found a potential copy 659 /// constructor/assignment operator whose first parameter is const-qualified. 660 /// This is used for determining parameter types of other objects and is 661 /// utterly meaningless on other types of special members. 662 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 663 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 664 public: 665 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 666 : FastFoldingSetNode(ID) 667 {} 668 669 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 670 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 671 672 bool hasSuccess() const { return Pair.getInt() & 0x1; } 673 void setSuccess(bool B) { 674 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 675 } 676 677 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 678 void setConstParamMatch(bool B) { 679 Pair.setInt(B << 1 | unsigned(hasSuccess())); 680 } 681 }; 682 683 /// \brief A cache of special member function overload resolution results 684 /// for C++ records. 685 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 686 687 /// \brief The kind of translation unit we are processing. 688 /// 689 /// When we're processing a complete translation unit, Sema will perform 690 /// end-of-translation-unit semantic tasks (such as creating 691 /// initializers for tentative definitions in C) once parsing has 692 /// completed. Modules and precompiled headers perform different kinds of 693 /// checks. 694 TranslationUnitKind TUKind; 695 696 llvm::BumpPtrAllocator BumpAlloc; 697 698 /// \brief The number of SFINAE diagnostics that have been trapped. 699 unsigned NumSFINAEErrors; 700 701 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 702 UnparsedDefaultArgInstantiationsMap; 703 704 /// \brief A mapping from parameters with unparsed default arguments to the 705 /// set of instantiations of each parameter. 706 /// 707 /// This mapping is a temporary data structure used when parsing 708 /// nested class templates or nested classes of class templates, 709 /// where we might end up instantiating an inner class before the 710 /// default arguments of its methods have been parsed. 711 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 712 713 // Contains the locations of the beginning of unparsed default 714 // argument locations. 715 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 716 717 /// UndefinedInternals - all the used, undefined objects with 718 /// internal linkage in this translation unit. 719 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 720 721 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 722 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 723 724 /// Method Pool - allows efficient lookup when typechecking messages to "id". 725 /// We need to maintain a list, since selectors can have differing signatures 726 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 727 /// of selectors are "overloaded"). 728 GlobalMethodPool MethodPool; 729 730 /// Method selectors used in a @selector expression. Used for implementation 731 /// of -Wselector. 732 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 733 734 void ReadMethodPool(Selector Sel); 735 736 /// Private Helper predicate to check for 'self'. 737 bool isSelfExpr(Expr *RExpr); 738 739 /// \brief Cause the active diagnostic on the DiagosticsEngine to be 740 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and 741 /// should not be used elsewhere. 742 void EmitCurrentDiagnostic(unsigned DiagID); 743 744public: 745 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 746 TranslationUnitKind TUKind = TU_Complete, 747 CodeCompleteConsumer *CompletionConsumer = 0); 748 ~Sema(); 749 750 /// \brief Perform initialization that occurs after the parser has been 751 /// initialized but before it parses anything. 752 void Initialize(); 753 754 const LangOptions &getLangOpts() const { return LangOpts; } 755 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 756 FPOptions &getFPOptions() { return FPFeatures; } 757 758 DiagnosticsEngine &getDiagnostics() const { return Diags; } 759 SourceManager &getSourceManager() const { return SourceMgr; } 760 const TargetAttributesSema &getTargetAttributesSema() const; 761 Preprocessor &getPreprocessor() const { return PP; } 762 ASTContext &getASTContext() const { return Context; } 763 ASTConsumer &getASTConsumer() const { return Consumer; } 764 ASTMutationListener *getASTMutationListener() const; 765 766 void PrintStats() const; 767 768 /// \brief Helper class that creates diagnostics with optional 769 /// template instantiation stacks. 770 /// 771 /// This class provides a wrapper around the basic DiagnosticBuilder 772 /// class that emits diagnostics. SemaDiagnosticBuilder is 773 /// responsible for emitting the diagnostic (as DiagnosticBuilder 774 /// does) and, if the diagnostic comes from inside a template 775 /// instantiation, printing the template instantiation stack as 776 /// well. 777 class SemaDiagnosticBuilder : public DiagnosticBuilder { 778 Sema &SemaRef; 779 unsigned DiagID; 780 781 public: 782 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 783 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 784 785 ~SemaDiagnosticBuilder() { 786 // If we aren't active, there is nothing to do. 787 if (!isActive()) return; 788 789 // Otherwise, we need to emit the diagnostic. First flush the underlying 790 // DiagnosticBuilder data, and clear the diagnostic builder itself so it 791 // won't emit the diagnostic in its own destructor. 792 // 793 // This seems wasteful, in that as written the DiagnosticBuilder dtor will 794 // do its own needless checks to see if the diagnostic needs to be 795 // emitted. However, because we take care to ensure that the builder 796 // objects never escape, a sufficiently smart compiler will be able to 797 // eliminate that code. 798 FlushCounts(); 799 Clear(); 800 801 // Dispatch to Sema to emit the diagnostic. 802 SemaRef.EmitCurrentDiagnostic(DiagID); 803 } 804 }; 805 806 /// \brief Emit a diagnostic. 807 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) { 808 DiagnosticBuilder DB = Diags.Report(Loc, DiagID); 809 return SemaDiagnosticBuilder(DB, *this, DiagID); 810 } 811 812 /// \brief Emit a partial diagnostic. 813 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 814 815 /// \brief Build a partial diagnostic. 816 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 817 818 bool findMacroSpelling(SourceLocation &loc, StringRef name); 819 820 /// \brief Get a string to suggest for zero-initialization of a type. 821 const char *getFixItZeroInitializerForType(QualType T) const; 822 823 ExprResult Owned(Expr* E) { return E; } 824 ExprResult Owned(ExprResult R) { return R; } 825 StmtResult Owned(Stmt* S) { return S; } 826 827 void ActOnEndOfTranslationUnit(); 828 829 void CheckDelegatingCtorCycles(); 830 831 Scope *getScopeForContext(DeclContext *Ctx); 832 833 void PushFunctionScope(); 834 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 835 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 836 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 837 const Decl *D = 0, const BlockExpr *blkExpr = 0); 838 839 sema::FunctionScopeInfo *getCurFunction() const { 840 return FunctionScopes.back(); 841 } 842 843 void PushCompoundScope(); 844 void PopCompoundScope(); 845 846 sema::CompoundScopeInfo &getCurCompoundScope() const; 847 848 bool hasAnyUnrecoverableErrorsInThisFunction() const; 849 850 /// \brief Retrieve the current block, if any. 851 sema::BlockScopeInfo *getCurBlock(); 852 853 /// \brief Retrieve the current lambda expression, if any. 854 sema::LambdaScopeInfo *getCurLambda(); 855 856 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 857 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 858 859 //===--------------------------------------------------------------------===// 860 // Type Analysis / Processing: SemaType.cpp. 861 // 862 863 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 864 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 865 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 866 } 867 QualType BuildPointerType(QualType T, 868 SourceLocation Loc, DeclarationName Entity); 869 QualType BuildReferenceType(QualType T, bool LValueRef, 870 SourceLocation Loc, DeclarationName Entity); 871 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 872 Expr *ArraySize, unsigned Quals, 873 SourceRange Brackets, DeclarationName Entity); 874 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 875 SourceLocation AttrLoc); 876 QualType BuildFunctionType(QualType T, 877 QualType *ParamTypes, unsigned NumParamTypes, 878 bool Variadic, bool HasTrailingReturn, 879 unsigned Quals, RefQualifierKind RefQualifier, 880 SourceLocation Loc, DeclarationName Entity, 881 FunctionType::ExtInfo Info); 882 QualType BuildMemberPointerType(QualType T, QualType Class, 883 SourceLocation Loc, 884 DeclarationName Entity); 885 QualType BuildBlockPointerType(QualType T, 886 SourceLocation Loc, DeclarationName Entity); 887 QualType BuildParenType(QualType T); 888 QualType BuildAtomicType(QualType T, SourceLocation Loc); 889 890 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 891 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 892 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 893 TypeSourceInfo *ReturnTypeInfo); 894 /// \brief Package the given type and TSI into a ParsedType. 895 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 896 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 897 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 898 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 899 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 900 bool CheckDistantExceptionSpec(QualType T); 901 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 902 bool CheckEquivalentExceptionSpec( 903 const FunctionProtoType *Old, SourceLocation OldLoc, 904 const FunctionProtoType *New, SourceLocation NewLoc); 905 bool CheckEquivalentExceptionSpec( 906 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 907 const FunctionProtoType *Old, SourceLocation OldLoc, 908 const FunctionProtoType *New, SourceLocation NewLoc, 909 bool *MissingExceptionSpecification = 0, 910 bool *MissingEmptyExceptionSpecification = 0, 911 bool AllowNoexceptAllMatchWithNoSpec = false, 912 bool IsOperatorNew = false); 913 bool CheckExceptionSpecSubset( 914 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 915 const FunctionProtoType *Superset, SourceLocation SuperLoc, 916 const FunctionProtoType *Subset, SourceLocation SubLoc); 917 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 918 const FunctionProtoType *Target, SourceLocation TargetLoc, 919 const FunctionProtoType *Source, SourceLocation SourceLoc); 920 921 TypeResult ActOnTypeName(Scope *S, Declarator &D); 922 923 /// \brief The parser has parsed the context-sensitive type 'instancetype' 924 /// in an Objective-C message declaration. Return the appropriate type. 925 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 926 927 bool RequireCompleteType(SourceLocation Loc, QualType T, 928 const PartialDiagnostic &PD, 929 std::pair<SourceLocation, PartialDiagnostic> Note); 930 bool RequireCompleteType(SourceLocation Loc, QualType T, 931 const PartialDiagnostic &PD); 932 bool RequireCompleteType(SourceLocation Loc, QualType T, 933 unsigned DiagID); 934 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 935 std::pair<SourceLocation, 936 PartialDiagnostic> Note); 937 938 bool RequireLiteralType(SourceLocation Loc, QualType T, 939 const PartialDiagnostic &PD); 940 941 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 942 const CXXScopeSpec &SS, QualType T); 943 944 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 945 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 946 QualType BuildUnaryTransformType(QualType BaseType, 947 UnaryTransformType::UTTKind UKind, 948 SourceLocation Loc); 949 950 //===--------------------------------------------------------------------===// 951 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 952 // 953 954 /// List of decls defined in a function prototype. This contains EnumConstants 955 /// that incorrectly end up in translation unit scope because there is no 956 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 957 /// them into the FunctionDecl. 958 std::vector<NamedDecl*> DeclsInPrototypeScope; 959 /// Nonzero if we are currently parsing a function declarator. This is a counter 960 /// as opposed to a boolean so we can deal with nested function declarators 961 /// such as: 962 /// void f(void (*g)(), ...) 963 unsigned InFunctionDeclarator; 964 965 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 966 967 void DiagnoseUseOfUnimplementedSelectors(); 968 969 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 970 Scope *S, CXXScopeSpec *SS = 0, 971 bool isClassName = false, 972 bool HasTrailingDot = false, 973 ParsedType ObjectType = ParsedType(), 974 bool IsCtorOrDtorName = false, 975 bool WantNontrivialTypeSourceInfo = false, 976 IdentifierInfo **CorrectedII = 0); 977 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 978 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 979 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 980 SourceLocation IILoc, 981 Scope *S, 982 CXXScopeSpec *SS, 983 ParsedType &SuggestedType); 984 985 /// \brief Describes the result of the name lookup and resolution performed 986 /// by \c ClassifyName(). 987 enum NameClassificationKind { 988 NC_Unknown, 989 NC_Error, 990 NC_Keyword, 991 NC_Type, 992 NC_Expression, 993 NC_NestedNameSpecifier, 994 NC_TypeTemplate, 995 NC_FunctionTemplate 996 }; 997 998 class NameClassification { 999 NameClassificationKind Kind; 1000 ExprResult Expr; 1001 TemplateName Template; 1002 ParsedType Type; 1003 const IdentifierInfo *Keyword; 1004 1005 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 1006 1007 public: 1008 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 1009 1010 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 1011 1012 NameClassification(const IdentifierInfo *Keyword) 1013 : Kind(NC_Keyword), Keyword(Keyword) { } 1014 1015 static NameClassification Error() { 1016 return NameClassification(NC_Error); 1017 } 1018 1019 static NameClassification Unknown() { 1020 return NameClassification(NC_Unknown); 1021 } 1022 1023 static NameClassification NestedNameSpecifier() { 1024 return NameClassification(NC_NestedNameSpecifier); 1025 } 1026 1027 static NameClassification TypeTemplate(TemplateName Name) { 1028 NameClassification Result(NC_TypeTemplate); 1029 Result.Template = Name; 1030 return Result; 1031 } 1032 1033 static NameClassification FunctionTemplate(TemplateName Name) { 1034 NameClassification Result(NC_FunctionTemplate); 1035 Result.Template = Name; 1036 return Result; 1037 } 1038 1039 NameClassificationKind getKind() const { return Kind; } 1040 1041 ParsedType getType() const { 1042 assert(Kind == NC_Type); 1043 return Type; 1044 } 1045 1046 ExprResult getExpression() const { 1047 assert(Kind == NC_Expression); 1048 return Expr; 1049 } 1050 1051 TemplateName getTemplateName() const { 1052 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1053 return Template; 1054 } 1055 1056 TemplateNameKind getTemplateNameKind() const { 1057 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1058 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1059 } 1060}; 1061 1062 /// \brief Perform name lookup on the given name, classifying it based on 1063 /// the results of name lookup and the following token. 1064 /// 1065 /// This routine is used by the parser to resolve identifiers and help direct 1066 /// parsing. When the identifier cannot be found, this routine will attempt 1067 /// to correct the typo and classify based on the resulting name. 1068 /// 1069 /// \param S The scope in which we're performing name lookup. 1070 /// 1071 /// \param SS The nested-name-specifier that precedes the name. 1072 /// 1073 /// \param Name The identifier. If typo correction finds an alternative name, 1074 /// this pointer parameter will be updated accordingly. 1075 /// 1076 /// \param NameLoc The location of the identifier. 1077 /// 1078 /// \param NextToken The token following the identifier. Used to help 1079 /// disambiguate the name. 1080 NameClassification ClassifyName(Scope *S, 1081 CXXScopeSpec &SS, 1082 IdentifierInfo *&Name, 1083 SourceLocation NameLoc, 1084 const Token &NextToken); 1085 1086 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1087 1088 Decl *HandleDeclarator(Scope *S, Declarator &D, 1089 MultiTemplateParamsArg TemplateParameterLists); 1090 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1091 const LookupResult &Previous, 1092 Scope *S); 1093 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1094 bool diagnoseQualifiedDeclInClass(CXXScopeSpec &SS, DeclContext *DC, 1095 DeclarationName Name, 1096 SourceLocation Loc); 1097 void DiagnoseFunctionSpecifiers(Declarator& D); 1098 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1099 void CheckShadow(Scope *S, VarDecl *D); 1100 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1101 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1102 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1103 TypeSourceInfo *TInfo, 1104 LookupResult &Previous); 1105 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1106 LookupResult &Previous, bool &Redeclaration); 1107 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1108 TypeSourceInfo *TInfo, 1109 LookupResult &Previous, 1110 MultiTemplateParamsArg TemplateParamLists); 1111 // Returns true if the variable declaration is a redeclaration 1112 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1113 void CheckCompleteVariableDeclaration(VarDecl *var); 1114 void ActOnStartFunctionDeclarator(); 1115 void ActOnEndFunctionDeclarator(); 1116 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1117 TypeSourceInfo *TInfo, 1118 LookupResult &Previous, 1119 MultiTemplateParamsArg TemplateParamLists, 1120 bool &AddToScope); 1121 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1122 1123 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1124 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1125 1126 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1127 // Returns true if the function declaration is a redeclaration 1128 bool CheckFunctionDeclaration(Scope *S, 1129 FunctionDecl *NewFD, LookupResult &Previous, 1130 bool IsExplicitSpecialization); 1131 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1132 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1133 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1134 SourceLocation Loc, 1135 QualType T); 1136 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1137 SourceLocation NameLoc, IdentifierInfo *Name, 1138 QualType T, TypeSourceInfo *TSInfo, 1139 StorageClass SC, StorageClass SCAsWritten); 1140 void ActOnParamDefaultArgument(Decl *param, 1141 SourceLocation EqualLoc, 1142 Expr *defarg); 1143 void ActOnParamUnparsedDefaultArgument(Decl *param, 1144 SourceLocation EqualLoc, 1145 SourceLocation ArgLoc); 1146 void ActOnParamDefaultArgumentError(Decl *param); 1147 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1148 SourceLocation EqualLoc); 1149 1150 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1151 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1152 bool TypeMayContainAuto); 1153 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1154 void ActOnInitializerError(Decl *Dcl); 1155 void ActOnCXXForRangeDecl(Decl *D); 1156 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1157 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1158 void FinalizeDeclaration(Decl *D); 1159 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1160 Decl **Group, 1161 unsigned NumDecls); 1162 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1163 bool TypeMayContainAuto = true); 1164 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1165 SourceLocation LocAfterDecls); 1166 void CheckForFunctionRedefinition(FunctionDecl *FD); 1167 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1168 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1169 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1170 1171 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1172 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1173 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1174 1175 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1176 /// attribute for which parsing is delayed. 1177 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1178 1179 /// \brief Diagnose any unused parameters in the given sequence of 1180 /// ParmVarDecl pointers. 1181 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1182 ParmVarDecl * const *End); 1183 1184 /// \brief Diagnose whether the size of parameters or return value of a 1185 /// function or obj-c method definition is pass-by-value and larger than a 1186 /// specified threshold. 1187 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1188 ParmVarDecl * const *End, 1189 QualType ReturnTy, 1190 NamedDecl *D); 1191 1192 void DiagnoseInvalidJumps(Stmt *Body); 1193 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1194 SourceLocation AsmLoc, 1195 SourceLocation RParenLoc); 1196 1197 /// \brief The parser has processed a module import declaration. 1198 /// 1199 /// \param AtLoc The location of the '@' symbol, if any. 1200 /// 1201 /// \param ImportLoc The location of the 'import' keyword. 1202 /// 1203 /// \param Path The module access path. 1204 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1205 ModuleIdPath Path); 1206 1207 /// \brief Retrieve a suitable printing policy. 1208 PrintingPolicy getPrintingPolicy() const { 1209 return getPrintingPolicy(Context, PP); 1210 } 1211 1212 /// \brief Retrieve a suitable printing policy. 1213 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1214 const Preprocessor &PP); 1215 1216 /// Scope actions. 1217 void ActOnPopScope(SourceLocation Loc, Scope *S); 1218 void ActOnTranslationUnitScope(Scope *S); 1219 1220 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1221 DeclSpec &DS); 1222 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1223 DeclSpec &DS, 1224 MultiTemplateParamsArg TemplateParams); 1225 1226 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1227 AccessSpecifier AS, 1228 RecordDecl *Record); 1229 1230 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1231 RecordDecl *Record); 1232 1233 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1234 TagTypeKind NewTag, bool isDefinition, 1235 SourceLocation NewTagLoc, 1236 const IdentifierInfo &Name); 1237 1238 enum TagUseKind { 1239 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1240 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1241 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1242 TUK_Friend // Friend declaration: 'friend struct foo;' 1243 }; 1244 1245 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1246 SourceLocation KWLoc, CXXScopeSpec &SS, 1247 IdentifierInfo *Name, SourceLocation NameLoc, 1248 AttributeList *Attr, AccessSpecifier AS, 1249 SourceLocation ModulePrivateLoc, 1250 MultiTemplateParamsArg TemplateParameterLists, 1251 bool &OwnedDecl, bool &IsDependent, 1252 SourceLocation ScopedEnumKWLoc, 1253 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1254 1255 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1256 unsigned TagSpec, SourceLocation TagLoc, 1257 CXXScopeSpec &SS, 1258 IdentifierInfo *Name, SourceLocation NameLoc, 1259 AttributeList *Attr, 1260 MultiTemplateParamsArg TempParamLists); 1261 1262 TypeResult ActOnDependentTag(Scope *S, 1263 unsigned TagSpec, 1264 TagUseKind TUK, 1265 const CXXScopeSpec &SS, 1266 IdentifierInfo *Name, 1267 SourceLocation TagLoc, 1268 SourceLocation NameLoc); 1269 1270 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1271 IdentifierInfo *ClassName, 1272 SmallVectorImpl<Decl *> &Decls); 1273 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1274 Declarator &D, Expr *BitfieldWidth); 1275 1276 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1277 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1278 AccessSpecifier AS); 1279 1280 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1281 TypeSourceInfo *TInfo, 1282 RecordDecl *Record, SourceLocation Loc, 1283 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1284 SourceLocation TSSL, 1285 AccessSpecifier AS, NamedDecl *PrevDecl, 1286 Declarator *D = 0); 1287 1288 enum CXXSpecialMember { 1289 CXXDefaultConstructor, 1290 CXXCopyConstructor, 1291 CXXMoveConstructor, 1292 CXXCopyAssignment, 1293 CXXMoveAssignment, 1294 CXXDestructor, 1295 CXXInvalid 1296 }; 1297 bool CheckNontrivialField(FieldDecl *FD); 1298 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1299 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1300 void ActOnLastBitfield(SourceLocation DeclStart, 1301 SmallVectorImpl<Decl *> &AllIvarDecls); 1302 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1303 Declarator &D, Expr *BitfieldWidth, 1304 tok::ObjCKeywordKind visibility); 1305 1306 // This is used for both record definitions and ObjC interface declarations. 1307 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1308 llvm::ArrayRef<Decl *> Fields, 1309 SourceLocation LBrac, SourceLocation RBrac, 1310 AttributeList *AttrList); 1311 1312 /// ActOnTagStartDefinition - Invoked when we have entered the 1313 /// scope of a tag's definition (e.g., for an enumeration, class, 1314 /// struct, or union). 1315 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1316 1317 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1318 1319 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1320 /// C++ record definition's base-specifiers clause and are starting its 1321 /// member declarations. 1322 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1323 SourceLocation FinalLoc, 1324 SourceLocation LBraceLoc); 1325 1326 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1327 /// the definition of a tag (enumeration, class, struct, or union). 1328 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1329 SourceLocation RBraceLoc); 1330 1331 void ActOnObjCContainerFinishDefinition(); 1332 1333 /// \brief Invoked when we must temporarily exit the objective-c container 1334 /// scope for parsing/looking-up C constructs. 1335 /// 1336 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1337 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1338 void ActOnObjCReenterContainerContext(DeclContext *DC); 1339 1340 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1341 /// error parsing the definition of a tag. 1342 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1343 1344 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1345 EnumConstantDecl *LastEnumConst, 1346 SourceLocation IdLoc, 1347 IdentifierInfo *Id, 1348 Expr *val); 1349 bool CheckEnumUnderlyingType(TypeSourceInfo *TI); 1350 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, 1351 QualType EnumUnderlyingTy, const EnumDecl *Prev); 1352 1353 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1354 SourceLocation IdLoc, IdentifierInfo *Id, 1355 AttributeList *Attrs, 1356 SourceLocation EqualLoc, Expr *Val); 1357 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1358 SourceLocation RBraceLoc, Decl *EnumDecl, 1359 Decl **Elements, unsigned NumElements, 1360 Scope *S, AttributeList *Attr); 1361 1362 DeclContext *getContainingDC(DeclContext *DC); 1363 1364 /// Set the current declaration context until it gets popped. 1365 void PushDeclContext(Scope *S, DeclContext *DC); 1366 void PopDeclContext(); 1367 1368 /// EnterDeclaratorContext - Used when we must lookup names in the context 1369 /// of a declarator's nested name specifier. 1370 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1371 void ExitDeclaratorContext(Scope *S); 1372 1373 /// Push the parameters of D, which must be a function, into scope. 1374 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1375 void ActOnExitFunctionContext() { PopDeclContext(); } 1376 1377 DeclContext *getFunctionLevelDeclContext(); 1378 1379 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1380 /// to the function decl for the function being parsed. If we're currently 1381 /// in a 'block', this returns the containing context. 1382 FunctionDecl *getCurFunctionDecl(); 1383 1384 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1385 /// the method decl for the method being parsed. If we're currently 1386 /// in a 'block', this returns the containing context. 1387 ObjCMethodDecl *getCurMethodDecl(); 1388 1389 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1390 /// or C function we're in, otherwise return null. If we're currently 1391 /// in a 'block', this returns the containing context. 1392 NamedDecl *getCurFunctionOrMethodDecl(); 1393 1394 /// Add this decl to the scope shadowed decl chains. 1395 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1396 1397 /// \brief Make the given externally-produced declaration visible at the 1398 /// top level scope. 1399 /// 1400 /// \param D The externally-produced declaration to push. 1401 /// 1402 /// \param Name The name of the externally-produced declaration. 1403 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1404 1405 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1406 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1407 /// true if 'D' belongs to the given declaration context. 1408 /// 1409 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1410 /// whether the declaration is in scope for the purposes of explicit template 1411 /// instantiation or specialization. The default is false. 1412 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1413 bool ExplicitInstantiationOrSpecialization = false); 1414 1415 /// Finds the scope corresponding to the given decl context, if it 1416 /// happens to be an enclosing scope. Otherwise return NULL. 1417 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1418 1419 /// Subroutines of ActOnDeclarator(). 1420 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1421 TypeSourceInfo *TInfo); 1422 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1423 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1424 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1425 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S); 1426 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, 1427 Scope *S); 1428 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1429 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1430 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1431 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1432 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S); 1433 1434 // AssignmentAction - This is used by all the assignment diagnostic functions 1435 // to represent what is actually causing the operation 1436 enum AssignmentAction { 1437 AA_Assigning, 1438 AA_Passing, 1439 AA_Returning, 1440 AA_Converting, 1441 AA_Initializing, 1442 AA_Sending, 1443 AA_Casting 1444 }; 1445 1446 /// C++ Overloading. 1447 enum OverloadKind { 1448 /// This is a legitimate overload: the existing declarations are 1449 /// functions or function templates with different signatures. 1450 Ovl_Overload, 1451 1452 /// This is not an overload because the signature exactly matches 1453 /// an existing declaration. 1454 Ovl_Match, 1455 1456 /// This is not an overload because the lookup results contain a 1457 /// non-function. 1458 Ovl_NonFunction 1459 }; 1460 OverloadKind CheckOverload(Scope *S, 1461 FunctionDecl *New, 1462 const LookupResult &OldDecls, 1463 NamedDecl *&OldDecl, 1464 bool IsForUsingDecl); 1465 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1466 1467 /// \brief Checks availability of the function depending on the current 1468 /// function context.Inside an unavailable function,unavailability is ignored. 1469 /// 1470 /// \returns true if \arg FD is unavailable and current context is inside 1471 /// an available function, false otherwise. 1472 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1473 1474 ImplicitConversionSequence 1475 TryImplicitConversion(Expr *From, QualType ToType, 1476 bool SuppressUserConversions, 1477 bool AllowExplicit, 1478 bool InOverloadResolution, 1479 bool CStyle, 1480 bool AllowObjCWritebackConversion); 1481 1482 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1483 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1484 bool IsComplexPromotion(QualType FromType, QualType ToType); 1485 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1486 bool InOverloadResolution, 1487 QualType& ConvertedType, bool &IncompatibleObjC); 1488 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1489 QualType& ConvertedType, bool &IncompatibleObjC); 1490 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1491 QualType &ConvertedType); 1492 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1493 QualType& ConvertedType); 1494 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1495 const FunctionProtoType *NewType, 1496 unsigned *ArgPos = 0); 1497 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1498 QualType FromType, QualType ToType); 1499 1500 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1501 bool CheckPointerConversion(Expr *From, QualType ToType, 1502 CastKind &Kind, 1503 CXXCastPath& BasePath, 1504 bool IgnoreBaseAccess); 1505 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1506 bool InOverloadResolution, 1507 QualType &ConvertedType); 1508 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1509 CastKind &Kind, 1510 CXXCastPath &BasePath, 1511 bool IgnoreBaseAccess); 1512 bool IsQualificationConversion(QualType FromType, QualType ToType, 1513 bool CStyle, bool &ObjCLifetimeConversion); 1514 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1515 QualType &ResultTy); 1516 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1517 1518 1519 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1520 const VarDecl *NRVOCandidate, 1521 QualType ResultType, 1522 Expr *Value, 1523 bool AllowNRVO = true); 1524 1525 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1526 ExprResult Init); 1527 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1528 SourceLocation EqualLoc, 1529 ExprResult Init, 1530 bool TopLevelOfInitList = false, 1531 bool AllowExplicit = false); 1532 ExprResult PerformObjectArgumentInitialization(Expr *From, 1533 NestedNameSpecifier *Qualifier, 1534 NamedDecl *FoundDecl, 1535 CXXMethodDecl *Method); 1536 1537 ExprResult PerformContextuallyConvertToBool(Expr *From); 1538 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1539 1540 /// Contexts in which a converted constant expression is required. 1541 enum CCEKind { 1542 CCEK_CaseValue, ///< Expression in a case label. 1543 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1544 CCEK_TemplateArg ///< Value of a non-type template parameter. 1545 }; 1546 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1547 llvm::APSInt &Value, CCEKind CCE); 1548 1549 ExprResult 1550 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1551 const PartialDiagnostic &NotIntDiag, 1552 const PartialDiagnostic &IncompleteDiag, 1553 const PartialDiagnostic &ExplicitConvDiag, 1554 const PartialDiagnostic &ExplicitConvNote, 1555 const PartialDiagnostic &AmbigDiag, 1556 const PartialDiagnostic &AmbigNote, 1557 const PartialDiagnostic &ConvDiag, 1558 bool AllowScopedEnumerations); 1559 enum ObjCSubscriptKind { 1560 OS_Array, 1561 OS_Dictionary, 1562 OS_Error 1563 }; 1564 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE); 1565 1566 ExprResult PerformObjectMemberConversion(Expr *From, 1567 NestedNameSpecifier *Qualifier, 1568 NamedDecl *FoundDecl, 1569 NamedDecl *Member); 1570 1571 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1572 // TODO: make this is a typesafe union. 1573 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1574 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1575 1576 void AddOverloadCandidate(FunctionDecl *Function, 1577 DeclAccessPair FoundDecl, 1578 llvm::ArrayRef<Expr *> Args, 1579 OverloadCandidateSet& CandidateSet, 1580 bool SuppressUserConversions = false, 1581 bool PartialOverloading = false, 1582 bool AllowExplicit = false); 1583 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1584 llvm::ArrayRef<Expr *> Args, 1585 OverloadCandidateSet& CandidateSet, 1586 bool SuppressUserConversions = false, 1587 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 1588 void AddMethodCandidate(DeclAccessPair FoundDecl, 1589 QualType ObjectType, 1590 Expr::Classification ObjectClassification, 1591 Expr **Args, unsigned NumArgs, 1592 OverloadCandidateSet& CandidateSet, 1593 bool SuppressUserConversion = false); 1594 void AddMethodCandidate(CXXMethodDecl *Method, 1595 DeclAccessPair FoundDecl, 1596 CXXRecordDecl *ActingContext, QualType ObjectType, 1597 Expr::Classification ObjectClassification, 1598 llvm::ArrayRef<Expr *> Args, 1599 OverloadCandidateSet& CandidateSet, 1600 bool SuppressUserConversions = false); 1601 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1602 DeclAccessPair FoundDecl, 1603 CXXRecordDecl *ActingContext, 1604 TemplateArgumentListInfo *ExplicitTemplateArgs, 1605 QualType ObjectType, 1606 Expr::Classification ObjectClassification, 1607 llvm::ArrayRef<Expr *> Args, 1608 OverloadCandidateSet& CandidateSet, 1609 bool SuppressUserConversions = false); 1610 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1611 DeclAccessPair FoundDecl, 1612 TemplateArgumentListInfo *ExplicitTemplateArgs, 1613 llvm::ArrayRef<Expr *> Args, 1614 OverloadCandidateSet& CandidateSet, 1615 bool SuppressUserConversions = false); 1616 void AddConversionCandidate(CXXConversionDecl *Conversion, 1617 DeclAccessPair FoundDecl, 1618 CXXRecordDecl *ActingContext, 1619 Expr *From, QualType ToType, 1620 OverloadCandidateSet& CandidateSet); 1621 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1622 DeclAccessPair FoundDecl, 1623 CXXRecordDecl *ActingContext, 1624 Expr *From, QualType ToType, 1625 OverloadCandidateSet &CandidateSet); 1626 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1627 DeclAccessPair FoundDecl, 1628 CXXRecordDecl *ActingContext, 1629 const FunctionProtoType *Proto, 1630 Expr *Object, llvm::ArrayRef<Expr*> Args, 1631 OverloadCandidateSet& CandidateSet); 1632 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1633 SourceLocation OpLoc, 1634 Expr **Args, unsigned NumArgs, 1635 OverloadCandidateSet& CandidateSet, 1636 SourceRange OpRange = SourceRange()); 1637 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1638 Expr **Args, unsigned NumArgs, 1639 OverloadCandidateSet& CandidateSet, 1640 bool IsAssignmentOperator = false, 1641 unsigned NumContextualBoolArguments = 0); 1642 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1643 SourceLocation OpLoc, 1644 Expr **Args, unsigned NumArgs, 1645 OverloadCandidateSet& CandidateSet); 1646 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1647 bool Operator, SourceLocation Loc, 1648 llvm::ArrayRef<Expr *> Args, 1649 TemplateArgumentListInfo *ExplicitTemplateArgs, 1650 OverloadCandidateSet& CandidateSet, 1651 bool PartialOverloading = false, 1652 bool StdNamespaceIsAssociated = false); 1653 1654 // Emit as a 'note' the specific overload candidate 1655 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1656 1657 // Emit as a series of 'note's all template and non-templates 1658 // identified by the expression Expr 1659 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1660 1661 // [PossiblyAFunctionType] --> [Return] 1662 // NonFunctionType --> NonFunctionType 1663 // R (A) --> R(A) 1664 // R (*)(A) --> R (A) 1665 // R (&)(A) --> R (A) 1666 // R (S::*)(A) --> R (A) 1667 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1668 1669 FunctionDecl * 1670 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1671 QualType TargetType, 1672 bool Complain, 1673 DeclAccessPair &Found, 1674 bool *pHadMultipleCandidates = 0); 1675 1676 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1677 bool Complain = false, 1678 DeclAccessPair* Found = 0); 1679 1680 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1681 ExprResult &SrcExpr, 1682 bool DoFunctionPointerConverion = false, 1683 bool Complain = false, 1684 const SourceRange& OpRangeForComplaining = SourceRange(), 1685 QualType DestTypeForComplaining = QualType(), 1686 unsigned DiagIDForComplaining = 0); 1687 1688 1689 Expr *FixOverloadedFunctionReference(Expr *E, 1690 DeclAccessPair FoundDecl, 1691 FunctionDecl *Fn); 1692 ExprResult FixOverloadedFunctionReference(ExprResult, 1693 DeclAccessPair FoundDecl, 1694 FunctionDecl *Fn); 1695 1696 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1697 llvm::ArrayRef<Expr *> Args, 1698 OverloadCandidateSet &CandidateSet, 1699 bool PartialOverloading = false); 1700 1701 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1702 UnresolvedLookupExpr *ULE, 1703 SourceLocation LParenLoc, 1704 Expr **Args, unsigned NumArgs, 1705 SourceLocation RParenLoc, 1706 Expr *ExecConfig, 1707 bool AllowTypoCorrection=true); 1708 1709 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1710 unsigned Opc, 1711 const UnresolvedSetImpl &Fns, 1712 Expr *input); 1713 1714 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1715 unsigned Opc, 1716 const UnresolvedSetImpl &Fns, 1717 Expr *LHS, Expr *RHS); 1718 1719 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1720 SourceLocation RLoc, 1721 Expr *Base,Expr *Idx); 1722 1723 ExprResult 1724 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1725 SourceLocation LParenLoc, Expr **Args, 1726 unsigned NumArgs, SourceLocation RParenLoc); 1727 ExprResult 1728 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1729 Expr **Args, unsigned NumArgs, 1730 SourceLocation RParenLoc); 1731 1732 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1733 SourceLocation OpLoc); 1734 1735 /// CheckCallReturnType - Checks that a call expression's return type is 1736 /// complete. Returns true on failure. The location passed in is the location 1737 /// that best represents the call. 1738 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1739 CallExpr *CE, FunctionDecl *FD); 1740 1741 /// Helpers for dealing with blocks and functions. 1742 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1743 bool CheckParameterNames); 1744 void CheckCXXDefaultArguments(FunctionDecl *FD); 1745 void CheckExtraCXXDefaultArguments(Declarator &D); 1746 Scope *getNonFieldDeclScope(Scope *S); 1747 1748 /// \name Name lookup 1749 /// 1750 /// These routines provide name lookup that is used during semantic 1751 /// analysis to resolve the various kinds of names (identifiers, 1752 /// overloaded operator names, constructor names, etc.) into zero or 1753 /// more declarations within a particular scope. The major entry 1754 /// points are LookupName, which performs unqualified name lookup, 1755 /// and LookupQualifiedName, which performs qualified name lookup. 1756 /// 1757 /// All name lookup is performed based on some specific criteria, 1758 /// which specify what names will be visible to name lookup and how 1759 /// far name lookup should work. These criteria are important both 1760 /// for capturing language semantics (certain lookups will ignore 1761 /// certain names, for example) and for performance, since name 1762 /// lookup is often a bottleneck in the compilation of C++. Name 1763 /// lookup criteria is specified via the LookupCriteria enumeration. 1764 /// 1765 /// The results of name lookup can vary based on the kind of name 1766 /// lookup performed, the current language, and the translation 1767 /// unit. In C, for example, name lookup will either return nothing 1768 /// (no entity found) or a single declaration. In C++, name lookup 1769 /// can additionally refer to a set of overloaded functions or 1770 /// result in an ambiguity. All of the possible results of name 1771 /// lookup are captured by the LookupResult class, which provides 1772 /// the ability to distinguish among them. 1773 //@{ 1774 1775 /// @brief Describes the kind of name lookup to perform. 1776 enum LookupNameKind { 1777 /// Ordinary name lookup, which finds ordinary names (functions, 1778 /// variables, typedefs, etc.) in C and most kinds of names 1779 /// (functions, variables, members, types, etc.) in C++. 1780 LookupOrdinaryName = 0, 1781 /// Tag name lookup, which finds the names of enums, classes, 1782 /// structs, and unions. 1783 LookupTagName, 1784 /// Label name lookup. 1785 LookupLabel, 1786 /// Member name lookup, which finds the names of 1787 /// class/struct/union members. 1788 LookupMemberName, 1789 /// Look up of an operator name (e.g., operator+) for use with 1790 /// operator overloading. This lookup is similar to ordinary name 1791 /// lookup, but will ignore any declarations that are class members. 1792 LookupOperatorName, 1793 /// Look up of a name that precedes the '::' scope resolution 1794 /// operator in C++. This lookup completely ignores operator, object, 1795 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1796 LookupNestedNameSpecifierName, 1797 /// Look up a namespace name within a C++ using directive or 1798 /// namespace alias definition, ignoring non-namespace names (C++ 1799 /// [basic.lookup.udir]p1). 1800 LookupNamespaceName, 1801 /// Look up all declarations in a scope with the given name, 1802 /// including resolved using declarations. This is appropriate 1803 /// for checking redeclarations for a using declaration. 1804 LookupUsingDeclName, 1805 /// Look up an ordinary name that is going to be redeclared as a 1806 /// name with linkage. This lookup ignores any declarations that 1807 /// are outside of the current scope unless they have linkage. See 1808 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1809 LookupRedeclarationWithLinkage, 1810 /// Look up the name of an Objective-C protocol. 1811 LookupObjCProtocolName, 1812 /// Look up implicit 'self' parameter of an objective-c method. 1813 LookupObjCImplicitSelfParam, 1814 /// \brief Look up any declaration with any name. 1815 LookupAnyName 1816 }; 1817 1818 /// \brief Specifies whether (or how) name lookup is being performed for a 1819 /// redeclaration (vs. a reference). 1820 enum RedeclarationKind { 1821 /// \brief The lookup is a reference to this name that is not for the 1822 /// purpose of redeclaring the name. 1823 NotForRedeclaration = 0, 1824 /// \brief The lookup results will be used for redeclaration of a name, 1825 /// if an entity by that name already exists. 1826 ForRedeclaration 1827 }; 1828 1829 /// \brief The possible outcomes of name lookup for a literal operator. 1830 enum LiteralOperatorLookupResult { 1831 /// \brief The lookup resulted in an error. 1832 LOLR_Error, 1833 /// \brief The lookup found a single 'cooked' literal operator, which 1834 /// expects a normal literal to be built and passed to it. 1835 LOLR_Cooked, 1836 /// \brief The lookup found a single 'raw' literal operator, which expects 1837 /// a string literal containing the spelling of the literal token. 1838 LOLR_Raw, 1839 /// \brief The lookup found an overload set of literal operator templates, 1840 /// which expect the characters of the spelling of the literal token to be 1841 /// passed as a non-type template argument pack. 1842 LOLR_Template 1843 }; 1844 1845 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1846 CXXSpecialMember SM, 1847 bool ConstArg, 1848 bool VolatileArg, 1849 bool RValueThis, 1850 bool ConstThis, 1851 bool VolatileThis); 1852 1853private: 1854 bool CppLookupName(LookupResult &R, Scope *S); 1855 1856 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1857 // 1858 // The boolean value will be true to indicate that the namespace was loaded 1859 // from an AST/PCH file, or false otherwise. 1860 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1861 1862 /// \brief Whether we have already loaded known namespaces from an extenal 1863 /// source. 1864 bool LoadedExternalKnownNamespaces; 1865 1866public: 1867 /// \brief Look up a name, looking for a single declaration. Return 1868 /// null if the results were absent, ambiguous, or overloaded. 1869 /// 1870 /// It is preferable to use the elaborated form and explicitly handle 1871 /// ambiguity and overloaded. 1872 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1873 SourceLocation Loc, 1874 LookupNameKind NameKind, 1875 RedeclarationKind Redecl 1876 = NotForRedeclaration); 1877 bool LookupName(LookupResult &R, Scope *S, 1878 bool AllowBuiltinCreation = false); 1879 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1880 bool InUnqualifiedLookup = false); 1881 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1882 bool AllowBuiltinCreation = false, 1883 bool EnteringContext = false); 1884 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1885 RedeclarationKind Redecl 1886 = NotForRedeclaration); 1887 1888 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1889 QualType T1, QualType T2, 1890 UnresolvedSetImpl &Functions); 1891 1892 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1893 SourceLocation GnuLabelLoc = SourceLocation()); 1894 1895 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1896 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1897 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1898 unsigned Quals, 1899 bool *ConstParam = 0); 1900 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1901 bool RValueThis, unsigned ThisQuals, 1902 bool *ConstParam = 0); 1903 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1904 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1905 unsigned ThisQuals); 1906 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1907 1908 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R, 1909 ArrayRef<QualType> ArgTys, 1910 bool AllowRawAndTemplate); 1911 1912 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1913 SourceLocation Loc, 1914 llvm::ArrayRef<Expr *> Args, 1915 ADLResult &Functions, 1916 bool StdNamespaceIsAssociated = false); 1917 1918 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1919 VisibleDeclConsumer &Consumer, 1920 bool IncludeGlobalScope = true); 1921 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1922 VisibleDeclConsumer &Consumer, 1923 bool IncludeGlobalScope = true); 1924 1925 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1926 Sema::LookupNameKind LookupKind, 1927 Scope *S, CXXScopeSpec *SS, 1928 CorrectionCandidateCallback &CCC, 1929 DeclContext *MemberContext = 0, 1930 bool EnteringContext = false, 1931 const ObjCObjectPointerType *OPT = 0); 1932 1933 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 1934 AssociatedNamespaceSet &AssociatedNamespaces, 1935 AssociatedClassSet &AssociatedClasses); 1936 1937 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1938 bool ConsiderLinkage, 1939 bool ExplicitInstantiationOrSpecialization); 1940 1941 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1942 //@} 1943 1944 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1945 SourceLocation IdLoc, 1946 bool TypoCorrection = false); 1947 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1948 Scope *S, bool ForRedeclaration, 1949 SourceLocation Loc); 1950 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1951 Scope *S); 1952 void AddKnownFunctionAttributes(FunctionDecl *FD); 1953 1954 // More parsing and symbol table subroutines. 1955 1956 // Decl attributes - this routine is the top level dispatcher. 1957 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1958 bool NonInheritable = true, bool Inheritable = true); 1959 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1960 bool NonInheritable = true, bool Inheritable = true); 1961 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1962 const AttributeList *AttrList); 1963 1964 void checkUnusedDeclAttributes(Declarator &D); 1965 1966 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1967 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1968 bool CheckNoReturnAttr(const AttributeList &attr); 1969 1970 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1971 bool &IncompleteImpl, unsigned DiagID); 1972 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1973 ObjCMethodDecl *MethodDecl, 1974 bool IsProtocolMethodDecl); 1975 1976 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1977 ObjCMethodDecl *Overridden, 1978 bool IsProtocolMethodDecl); 1979 1980 /// WarnExactTypedMethods - This routine issues a warning if method 1981 /// implementation declaration matches exactly that of its declaration. 1982 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1983 ObjCMethodDecl *MethodDecl, 1984 bool IsProtocolMethodDecl); 1985 1986 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1987 ObjCInterfaceDecl *IDecl); 1988 1989 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1990 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1991 1992 /// CheckProtocolMethodDefs - This routine checks unimplemented 1993 /// methods declared in protocol, and those referenced by it. 1994 /// \param IDecl - Used for checking for methods which may have been 1995 /// inherited. 1996 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1997 ObjCProtocolDecl *PDecl, 1998 bool& IncompleteImpl, 1999 const SelectorSet &InsMap, 2000 const SelectorSet &ClsMap, 2001 ObjCContainerDecl *CDecl); 2002 2003 /// CheckImplementationIvars - This routine checks if the instance variables 2004 /// listed in the implelementation match those listed in the interface. 2005 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 2006 ObjCIvarDecl **Fields, unsigned nIvars, 2007 SourceLocation Loc); 2008 2009 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 2010 /// remains unimplemented in the class or category @implementation. 2011 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 2012 ObjCContainerDecl* IDecl, 2013 bool IncompleteImpl = false); 2014 2015 /// DiagnoseUnimplementedProperties - This routine warns on those properties 2016 /// which must be implemented by this implementation. 2017 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 2018 ObjCContainerDecl *CDecl, 2019 const SelectorSet &InsMap); 2020 2021 /// DefaultSynthesizeProperties - This routine default synthesizes all 2022 /// properties which must be synthesized in class's @implementation. 2023 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 2024 ObjCInterfaceDecl *IDecl); 2025 void DefaultSynthesizeProperties(Scope *S, Decl *D); 2026 2027 /// CollectImmediateProperties - This routine collects all properties in 2028 /// the class and its conforming protocols; but not those it its super class. 2029 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 2030 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 2031 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 2032 2033 2034 /// LookupPropertyDecl - Looks up a property in the current class and all 2035 /// its protocols. 2036 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 2037 IdentifierInfo *II); 2038 2039 /// Called by ActOnProperty to handle @property declarations in 2040 //// class extensions. 2041 Decl *HandlePropertyInClassExtension(Scope *S, 2042 SourceLocation AtLoc, 2043 SourceLocation LParenLoc, 2044 FieldDeclarator &FD, 2045 Selector GetterSel, 2046 Selector SetterSel, 2047 const bool isAssign, 2048 const bool isReadWrite, 2049 const unsigned Attributes, 2050 const unsigned AttributesAsWritten, 2051 bool *isOverridingProperty, 2052 TypeSourceInfo *T, 2053 tok::ObjCKeywordKind MethodImplKind); 2054 2055 /// Called by ActOnProperty and HandlePropertyInClassExtension to 2056 /// handle creating the ObjcPropertyDecl for a category or @interface. 2057 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 2058 ObjCContainerDecl *CDecl, 2059 SourceLocation AtLoc, 2060 SourceLocation LParenLoc, 2061 FieldDeclarator &FD, 2062 Selector GetterSel, 2063 Selector SetterSel, 2064 const bool isAssign, 2065 const bool isReadWrite, 2066 const unsigned Attributes, 2067 const unsigned AttributesAsWritten, 2068 TypeSourceInfo *T, 2069 tok::ObjCKeywordKind MethodImplKind, 2070 DeclContext *lexicalDC = 0); 2071 2072 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2073 /// warning) when atomic property has one but not the other user-declared 2074 /// setter or getter. 2075 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2076 ObjCContainerDecl* IDecl); 2077 2078 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2079 2080 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2081 2082 enum MethodMatchStrategy { 2083 MMS_loose, 2084 MMS_strict 2085 }; 2086 2087 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2088 /// true, or false, accordingly. 2089 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2090 const ObjCMethodDecl *PrevMethod, 2091 MethodMatchStrategy strategy = MMS_strict); 2092 2093 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2094 /// or protocol against those declared in their implementations. 2095 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2096 const SelectorSet &ClsMap, 2097 SelectorSet &InsMapSeen, 2098 SelectorSet &ClsMapSeen, 2099 ObjCImplDecl* IMPDecl, 2100 ObjCContainerDecl* IDecl, 2101 bool &IncompleteImpl, 2102 bool ImmediateClass, 2103 bool WarnCategoryMethodImpl=false); 2104 2105 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2106 /// category matches with those implemented in its primary class and 2107 /// warns each time an exact match is found. 2108 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2109 2110 /// \brief Add the given method to the list of globally-known methods. 2111 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2112 2113private: 2114 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2115 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2116 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2117 2118 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2119 /// optionally warns if there are multiple signatures. 2120 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2121 bool receiverIdOrClass, 2122 bool warn, bool instance); 2123 2124public: 2125 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2126 /// unit are added to a global pool. This allows us to efficiently associate 2127 /// a selector with a method declaraation for purposes of typechecking 2128 /// messages sent to "id" (where the class of the object is unknown). 2129 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2130 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2131 } 2132 2133 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2134 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2135 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2136 } 2137 2138 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2139 /// pool. 2140 void AddAnyMethodToGlobalPool(Decl *D); 2141 2142 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2143 /// there are multiple signatures. 2144 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2145 bool receiverIdOrClass=false, 2146 bool warn=true) { 2147 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2148 warn, /*instance*/true); 2149 } 2150 2151 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2152 /// there are multiple signatures. 2153 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2154 bool receiverIdOrClass=false, 2155 bool warn=true) { 2156 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2157 warn, /*instance*/false); 2158 } 2159 2160 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2161 /// implementation. 2162 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2163 2164 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2165 /// initialization. 2166 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2167 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2168 2169 //===--------------------------------------------------------------------===// 2170 // Statement Parsing Callbacks: SemaStmt.cpp. 2171public: 2172 class FullExprArg { 2173 public: 2174 FullExprArg(Sema &actions) : E(0) { } 2175 2176 // FIXME: The const_cast here is ugly. RValue references would make this 2177 // much nicer (or we could duplicate a bunch of the move semantics 2178 // emulation code from Ownership.h). 2179 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2180 2181 ExprResult release() { 2182 return move(E); 2183 } 2184 2185 Expr *get() const { return E; } 2186 2187 Expr *operator->() { 2188 return E; 2189 } 2190 2191 private: 2192 // FIXME: No need to make the entire Sema class a friend when it's just 2193 // Sema::MakeFullExpr that needs access to the constructor below. 2194 friend class Sema; 2195 2196 explicit FullExprArg(Expr *expr) : E(expr) {} 2197 2198 Expr *E; 2199 }; 2200 2201 FullExprArg MakeFullExpr(Expr *Arg) { 2202 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2203 } 2204 2205 StmtResult ActOnExprStmt(FullExprArg Expr); 2206 2207 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2208 bool HasLeadingEmptyMacro = false); 2209 2210 void ActOnStartOfCompoundStmt(); 2211 void ActOnFinishOfCompoundStmt(); 2212 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2213 MultiStmtArg Elts, 2214 bool isStmtExpr); 2215 2216 /// \brief A RAII object to enter scope of a compound statement. 2217 class CompoundScopeRAII { 2218 public: 2219 CompoundScopeRAII(Sema &S): S(S) { 2220 S.ActOnStartOfCompoundStmt(); 2221 } 2222 2223 ~CompoundScopeRAII() { 2224 S.ActOnFinishOfCompoundStmt(); 2225 } 2226 2227 private: 2228 Sema &S; 2229 }; 2230 2231 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2232 SourceLocation StartLoc, 2233 SourceLocation EndLoc); 2234 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2235 StmtResult ActOnForEachLValueExpr(Expr *E); 2236 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2237 SourceLocation DotDotDotLoc, Expr *RHSVal, 2238 SourceLocation ColonLoc); 2239 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2240 2241 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2242 SourceLocation ColonLoc, 2243 Stmt *SubStmt, Scope *CurScope); 2244 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2245 SourceLocation ColonLoc, Stmt *SubStmt); 2246 2247 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2248 FullExprArg CondVal, Decl *CondVar, 2249 Stmt *ThenVal, 2250 SourceLocation ElseLoc, Stmt *ElseVal); 2251 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2252 Expr *Cond, 2253 Decl *CondVar); 2254 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2255 Stmt *Switch, Stmt *Body); 2256 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2257 FullExprArg Cond, 2258 Decl *CondVar, Stmt *Body); 2259 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2260 SourceLocation WhileLoc, 2261 SourceLocation CondLParen, Expr *Cond, 2262 SourceLocation CondRParen); 2263 2264 StmtResult ActOnForStmt(SourceLocation ForLoc, 2265 SourceLocation LParenLoc, 2266 Stmt *First, FullExprArg Second, 2267 Decl *SecondVar, 2268 FullExprArg Third, 2269 SourceLocation RParenLoc, 2270 Stmt *Body); 2271 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2272 Expr *collection); 2273 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2274 SourceLocation LParenLoc, 2275 Stmt *First, Expr *Second, 2276 SourceLocation RParenLoc, Stmt *Body); 2277 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2278 SourceLocation LParenLoc, Stmt *LoopVar, 2279 SourceLocation ColonLoc, Expr *Collection, 2280 SourceLocation RParenLoc); 2281 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2282 SourceLocation ColonLoc, 2283 Stmt *RangeDecl, Stmt *BeginEndDecl, 2284 Expr *Cond, Expr *Inc, 2285 Stmt *LoopVarDecl, 2286 SourceLocation RParenLoc); 2287 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2288 2289 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2290 SourceLocation LabelLoc, 2291 LabelDecl *TheDecl); 2292 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2293 SourceLocation StarLoc, 2294 Expr *DestExp); 2295 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2296 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2297 2298 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2299 bool AllowFunctionParameters); 2300 2301 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2302 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2303 2304 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2305 bool IsSimple, bool IsVolatile, 2306 unsigned NumOutputs, unsigned NumInputs, 2307 IdentifierInfo **Names, 2308 MultiExprArg Constraints, 2309 MultiExprArg Exprs, 2310 Expr *AsmString, 2311 MultiExprArg Clobbers, 2312 SourceLocation RParenLoc, 2313 bool MSAsm = false); 2314 2315 2316 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2317 SourceLocation StartLoc, 2318 SourceLocation IdLoc, IdentifierInfo *Id, 2319 bool Invalid = false); 2320 2321 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2322 2323 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2324 Decl *Parm, Stmt *Body); 2325 2326 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2327 2328 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2329 MultiStmtArg Catch, Stmt *Finally); 2330 2331 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2332 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2333 Scope *CurScope); 2334 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2335 Expr *operand); 2336 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2337 Expr *SynchExpr, 2338 Stmt *SynchBody); 2339 2340 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2341 2342 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2343 SourceLocation StartLoc, 2344 SourceLocation IdLoc, 2345 IdentifierInfo *Id); 2346 2347 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2348 2349 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2350 Decl *ExDecl, Stmt *HandlerBlock); 2351 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2352 MultiStmtArg Handlers); 2353 2354 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2355 SourceLocation TryLoc, 2356 Stmt *TryBlock, 2357 Stmt *Handler); 2358 2359 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2360 Expr *FilterExpr, 2361 Stmt *Block); 2362 2363 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2364 Stmt *Block); 2365 2366 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2367 2368 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2369 2370 /// \brief If it's a file scoped decl that must warn if not used, keep track 2371 /// of it. 2372 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2373 2374 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2375 /// whose result is unused, warn. 2376 void DiagnoseUnusedExprResult(const Stmt *S); 2377 void DiagnoseUnusedDecl(const NamedDecl *ND); 2378 2379 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2380 /// statement as a \p Body, and it is located on the same line. 2381 /// 2382 /// This helps prevent bugs due to typos, such as: 2383 /// if (condition); 2384 /// do_stuff(); 2385 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2386 const Stmt *Body, 2387 unsigned DiagID); 2388 2389 /// Warn if a for/while loop statement \p S, which is followed by 2390 /// \p PossibleBody, has a suspicious null statement as a body. 2391 void DiagnoseEmptyLoopBody(const Stmt *S, 2392 const Stmt *PossibleBody); 2393 2394 ParsingDeclState PushParsingDeclaration() { 2395 return DelayedDiagnostics.pushParsingDecl(); 2396 } 2397 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2398 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2399 } 2400 2401 typedef ProcessingContextState ParsingClassState; 2402 ParsingClassState PushParsingClass() { 2403 return DelayedDiagnostics.pushContext(); 2404 } 2405 void PopParsingClass(ParsingClassState state) { 2406 DelayedDiagnostics.popContext(state); 2407 } 2408 2409 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2410 SourceLocation Loc, 2411 const ObjCInterfaceDecl *UnknownObjCClass=0); 2412 2413 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2414 2415 bool makeUnavailableInSystemHeader(SourceLocation loc, 2416 StringRef message); 2417 2418 //===--------------------------------------------------------------------===// 2419 // Expression Parsing Callbacks: SemaExpr.cpp. 2420 2421 bool CanUseDecl(NamedDecl *D); 2422 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2423 const ObjCInterfaceDecl *UnknownObjCClass=0); 2424 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2425 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2426 ObjCMethodDecl *Getter, 2427 SourceLocation Loc); 2428 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2429 Expr **Args, unsigned NumArgs); 2430 2431 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2432 Decl *LambdaContextDecl = 0, 2433 bool IsDecltype = false); 2434 2435 void PopExpressionEvaluationContext(); 2436 2437 void DiscardCleanupsInEvaluationContext(); 2438 2439 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2440 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2441 2442 ExprResult ActOnConstantExpression(ExprResult Res); 2443 2444 // Functions for marking a declaration referenced. These functions also 2445 // contain the relevant logic for marking if a reference to a function or 2446 // variable is an odr-use (in the C++11 sense). There are separate variants 2447 // for expressions referring to a decl; these exist because odr-use marking 2448 // needs to be delayed for some constant variables when we build one of the 2449 // named expressions. 2450 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2451 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2452 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2453 void MarkDeclRefReferenced(DeclRefExpr *E); 2454 void MarkMemberReferenced(MemberExpr *E); 2455 2456 void UpdateMarkingForLValueToRValue(Expr *E); 2457 void CleanupVarDeclMarking(); 2458 2459 enum TryCaptureKind { 2460 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2461 }; 2462 2463 /// \brief Try to capture the given variable. 2464 /// 2465 /// \param Var The variable to capture. 2466 /// 2467 /// \param Loc The location at which the capture occurs. 2468 /// 2469 /// \param Kind The kind of capture, which may be implicit (for either a 2470 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2471 /// 2472 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2473 /// an explicit lambda capture. 2474 /// 2475 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2476 /// captures or diagnose errors. If false, this routine merely check whether 2477 /// the capture can occur without performing the capture itself or complaining 2478 /// if the variable cannot be captured. 2479 /// 2480 /// \param CaptureType Will be set to the type of the field used to capture 2481 /// this variable in the innermost block or lambda. Only valid when the 2482 /// variable can be captured. 2483 /// 2484 /// \param DeclRefType Will be set to the type of a refernce to the capture 2485 /// from within the current scope. Only valid when the variable can be 2486 /// captured. 2487 /// 2488 /// \returns true if an error occurred (i.e., the variable cannot be 2489 /// captured) and false if the capture succeeded. 2490 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2491 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2492 QualType &CaptureType, 2493 QualType &DeclRefType); 2494 2495 /// \brief Try to capture the given variable. 2496 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2497 TryCaptureKind Kind = TryCapture_Implicit, 2498 SourceLocation EllipsisLoc = SourceLocation()); 2499 2500 /// \brief Given a variable, determine the type that a reference to that 2501 /// variable will have in the given scope. 2502 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2503 2504 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2505 void MarkDeclarationsReferencedInExpr(Expr *E, 2506 bool SkipLocalVariables = false); 2507 2508 /// \brief Try to recover by turning the given expression into a 2509 /// call. Returns true if recovery was attempted or an error was 2510 /// emitted; this may also leave the ExprResult invalid. 2511 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2512 bool ForceComplain = false, 2513 bool (*IsPlausibleResult)(QualType) = 0); 2514 2515 /// \brief Figure out if an expression could be turned into a call. 2516 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2517 UnresolvedSetImpl &NonTemplateOverloads); 2518 2519 /// \brief Conditionally issue a diagnostic based on the current 2520 /// evaluation context. 2521 /// 2522 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2523 /// the function body is parsed, and then do a basic reachability analysis to 2524 /// determine if the statement is reachable. If it is unreachable, the 2525 /// diagnostic will not be emitted. 2526 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2527 const PartialDiagnostic &PD); 2528 2529 // Primary Expressions. 2530 SourceRange getExprRange(Expr *E) const; 2531 2532 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2533 SourceLocation TemplateKWLoc, 2534 UnqualifiedId &Id, 2535 bool HasTrailingLParen, bool IsAddressOfOperand, 2536 CorrectionCandidateCallback *CCC = 0); 2537 2538 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2539 TemplateArgumentListInfo &Buffer, 2540 DeclarationNameInfo &NameInfo, 2541 const TemplateArgumentListInfo *&TemplateArgs); 2542 2543 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2544 CorrectionCandidateCallback &CCC, 2545 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2546 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2547 2548 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2549 IdentifierInfo *II, 2550 bool AllowBuiltinCreation=false); 2551 2552 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2553 SourceLocation TemplateKWLoc, 2554 const DeclarationNameInfo &NameInfo, 2555 bool isAddressOfOperand, 2556 const TemplateArgumentListInfo *TemplateArgs); 2557 2558 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2559 ExprValueKind VK, 2560 SourceLocation Loc, 2561 const CXXScopeSpec *SS = 0); 2562 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2563 ExprValueKind VK, 2564 const DeclarationNameInfo &NameInfo, 2565 const CXXScopeSpec *SS = 0); 2566 ExprResult 2567 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2568 SourceLocation nameLoc, 2569 IndirectFieldDecl *indirectField, 2570 Expr *baseObjectExpr = 0, 2571 SourceLocation opLoc = SourceLocation()); 2572 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2573 SourceLocation TemplateKWLoc, 2574 LookupResult &R, 2575 const TemplateArgumentListInfo *TemplateArgs); 2576 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2577 SourceLocation TemplateKWLoc, 2578 LookupResult &R, 2579 const TemplateArgumentListInfo *TemplateArgs, 2580 bool IsDefiniteInstance); 2581 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2582 const LookupResult &R, 2583 bool HasTrailingLParen); 2584 2585 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2586 const DeclarationNameInfo &NameInfo); 2587 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2588 SourceLocation TemplateKWLoc, 2589 const DeclarationNameInfo &NameInfo, 2590 const TemplateArgumentListInfo *TemplateArgs); 2591 2592 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2593 LookupResult &R, 2594 bool NeedsADL); 2595 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2596 const DeclarationNameInfo &NameInfo, 2597 NamedDecl *D); 2598 2599 ExprResult BuildLiteralOperatorCall(LookupResult &R, 2600 DeclarationNameInfo &SuffixInfo, 2601 ArrayRef<Expr*> Args, 2602 SourceLocation LitEndLoc, 2603 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 2604 2605 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2606 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val); 2607 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0); 2608 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0); 2609 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2610 ExprResult ActOnParenListExpr(SourceLocation L, 2611 SourceLocation R, 2612 MultiExprArg Val); 2613 2614 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2615 /// fragments (e.g. "foo" "bar" L"baz"). 2616 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks, 2617 Scope *UDLScope = 0); 2618 2619 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2620 SourceLocation DefaultLoc, 2621 SourceLocation RParenLoc, 2622 Expr *ControllingExpr, 2623 MultiTypeArg ArgTypes, 2624 MultiExprArg ArgExprs); 2625 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2626 SourceLocation DefaultLoc, 2627 SourceLocation RParenLoc, 2628 Expr *ControllingExpr, 2629 TypeSourceInfo **Types, 2630 Expr **Exprs, 2631 unsigned NumAssocs); 2632 2633 // Binary/Unary Operators. 'Tok' is the token for the operator. 2634 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2635 Expr *InputExpr); 2636 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2637 UnaryOperatorKind Opc, Expr *Input); 2638 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2639 tok::TokenKind Op, Expr *Input); 2640 2641 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2642 SourceLocation OpLoc, 2643 UnaryExprOrTypeTrait ExprKind, 2644 SourceRange R); 2645 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2646 UnaryExprOrTypeTrait ExprKind); 2647 ExprResult 2648 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2649 UnaryExprOrTypeTrait ExprKind, 2650 bool IsType, void *TyOrEx, 2651 const SourceRange &ArgRange); 2652 2653 ExprResult CheckPlaceholderExpr(Expr *E); 2654 bool CheckVecStepExpr(Expr *E); 2655 2656 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2657 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2658 SourceRange ExprRange, 2659 UnaryExprOrTypeTrait ExprKind); 2660 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2661 SourceLocation OpLoc, 2662 IdentifierInfo &Name, 2663 SourceLocation NameLoc, 2664 SourceLocation RParenLoc); 2665 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2666 tok::TokenKind Kind, Expr *Input); 2667 2668 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2669 Expr *Idx, SourceLocation RLoc); 2670 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2671 Expr *Idx, SourceLocation RLoc); 2672 2673 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2674 SourceLocation OpLoc, bool IsArrow, 2675 CXXScopeSpec &SS, 2676 SourceLocation TemplateKWLoc, 2677 NamedDecl *FirstQualifierInScope, 2678 const DeclarationNameInfo &NameInfo, 2679 const TemplateArgumentListInfo *TemplateArgs); 2680 2681 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2682 SourceLocation OpLoc, bool IsArrow, 2683 const CXXScopeSpec &SS, 2684 SourceLocation TemplateKWLoc, 2685 NamedDecl *FirstQualifierInScope, 2686 LookupResult &R, 2687 const TemplateArgumentListInfo *TemplateArgs, 2688 bool SuppressQualifierCheck = false); 2689 2690 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2691 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2692 bool &IsArrow, SourceLocation OpLoc, 2693 CXXScopeSpec &SS, 2694 Decl *ObjCImpDecl, 2695 bool HasTemplateArgs); 2696 2697 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2698 const CXXScopeSpec &SS, 2699 const LookupResult &R); 2700 2701 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2702 bool IsArrow, SourceLocation OpLoc, 2703 const CXXScopeSpec &SS, 2704 SourceLocation TemplateKWLoc, 2705 NamedDecl *FirstQualifierInScope, 2706 const DeclarationNameInfo &NameInfo, 2707 const TemplateArgumentListInfo *TemplateArgs); 2708 2709 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2710 SourceLocation OpLoc, 2711 tok::TokenKind OpKind, 2712 CXXScopeSpec &SS, 2713 SourceLocation TemplateKWLoc, 2714 UnqualifiedId &Member, 2715 Decl *ObjCImpDecl, 2716 bool HasTrailingLParen); 2717 2718 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2719 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2720 FunctionDecl *FDecl, 2721 const FunctionProtoType *Proto, 2722 Expr **Args, unsigned NumArgs, 2723 SourceLocation RParenLoc, 2724 bool ExecConfig = false); 2725 void CheckStaticArrayArgument(SourceLocation CallLoc, 2726 ParmVarDecl *Param, 2727 const Expr *ArgExpr); 2728 2729 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2730 /// This provides the location of the left/right parens and a list of comma 2731 /// locations. 2732 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2733 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2734 Expr *ExecConfig = 0, bool IsExecConfig = false); 2735 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2736 SourceLocation LParenLoc, 2737 Expr **Args, unsigned NumArgs, 2738 SourceLocation RParenLoc, 2739 Expr *Config = 0, 2740 bool IsExecConfig = false); 2741 2742 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2743 MultiExprArg ExecConfig, 2744 SourceLocation GGGLoc); 2745 2746 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2747 Declarator &D, ParsedType &Ty, 2748 SourceLocation RParenLoc, Expr *CastExpr); 2749 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2750 TypeSourceInfo *Ty, 2751 SourceLocation RParenLoc, 2752 Expr *Op); 2753 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2754 2755 /// \brief Build an altivec or OpenCL literal. 2756 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2757 SourceLocation RParenLoc, Expr *E, 2758 TypeSourceInfo *TInfo); 2759 2760 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2761 2762 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2763 ParsedType Ty, 2764 SourceLocation RParenLoc, 2765 Expr *InitExpr); 2766 2767 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2768 TypeSourceInfo *TInfo, 2769 SourceLocation RParenLoc, 2770 Expr *LiteralExpr); 2771 2772 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2773 MultiExprArg InitArgList, 2774 SourceLocation RBraceLoc); 2775 2776 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2777 SourceLocation Loc, 2778 bool GNUSyntax, 2779 ExprResult Init); 2780 2781 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2782 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2783 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2784 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2785 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2786 Expr *LHSExpr, Expr *RHSExpr); 2787 2788 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2789 /// in the case of a the GNU conditional expr extension. 2790 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2791 SourceLocation ColonLoc, 2792 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2793 2794 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2795 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2796 LabelDecl *TheDecl); 2797 2798 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2799 SourceLocation RPLoc); // "({..})" 2800 2801 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2802 struct OffsetOfComponent { 2803 SourceLocation LocStart, LocEnd; 2804 bool isBrackets; // true if [expr], false if .ident 2805 union { 2806 IdentifierInfo *IdentInfo; 2807 Expr *E; 2808 } U; 2809 }; 2810 2811 /// __builtin_offsetof(type, a.b[123][456].c) 2812 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2813 TypeSourceInfo *TInfo, 2814 OffsetOfComponent *CompPtr, 2815 unsigned NumComponents, 2816 SourceLocation RParenLoc); 2817 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2818 SourceLocation BuiltinLoc, 2819 SourceLocation TypeLoc, 2820 ParsedType ParsedArgTy, 2821 OffsetOfComponent *CompPtr, 2822 unsigned NumComponents, 2823 SourceLocation RParenLoc); 2824 2825 // __builtin_choose_expr(constExpr, expr1, expr2) 2826 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2827 Expr *CondExpr, Expr *LHSExpr, 2828 Expr *RHSExpr, SourceLocation RPLoc); 2829 2830 // __builtin_va_arg(expr, type) 2831 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2832 SourceLocation RPLoc); 2833 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2834 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2835 2836 // __null 2837 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2838 2839 bool CheckCaseExpression(Expr *E); 2840 2841 /// \brief Describes the result of an "if-exists" condition check. 2842 enum IfExistsResult { 2843 /// \brief The symbol exists. 2844 IER_Exists, 2845 2846 /// \brief The symbol does not exist. 2847 IER_DoesNotExist, 2848 2849 /// \brief The name is a dependent name, so the results will differ 2850 /// from one instantiation to the next. 2851 IER_Dependent, 2852 2853 /// \brief An error occurred. 2854 IER_Error 2855 }; 2856 2857 IfExistsResult 2858 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2859 const DeclarationNameInfo &TargetNameInfo); 2860 2861 IfExistsResult 2862 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2863 bool IsIfExists, CXXScopeSpec &SS, 2864 UnqualifiedId &Name); 2865 2866 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2867 bool IsIfExists, 2868 NestedNameSpecifierLoc QualifierLoc, 2869 DeclarationNameInfo NameInfo, 2870 Stmt *Nested); 2871 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2872 bool IsIfExists, 2873 CXXScopeSpec &SS, UnqualifiedId &Name, 2874 Stmt *Nested); 2875 2876 //===------------------------- "Block" Extension ------------------------===// 2877 2878 /// ActOnBlockStart - This callback is invoked when a block literal is 2879 /// started. 2880 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2881 2882 /// ActOnBlockArguments - This callback allows processing of block arguments. 2883 /// If there are no arguments, this is still invoked. 2884 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2885 2886 /// ActOnBlockError - If there is an error parsing a block, this callback 2887 /// is invoked to pop the information about the block from the action impl. 2888 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2889 2890 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2891 /// literal was successfully completed. ^(int x){...} 2892 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2893 Scope *CurScope); 2894 2895 //===---------------------------- OpenCL Features -----------------------===// 2896 2897 /// __builtin_astype(...) 2898 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2899 SourceLocation BuiltinLoc, 2900 SourceLocation RParenLoc); 2901 2902 //===---------------------------- C++ Features --------------------------===// 2903 2904 // Act on C++ namespaces 2905 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2906 SourceLocation NamespaceLoc, 2907 SourceLocation IdentLoc, 2908 IdentifierInfo *Ident, 2909 SourceLocation LBrace, 2910 AttributeList *AttrList); 2911 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2912 2913 NamespaceDecl *getStdNamespace() const; 2914 NamespaceDecl *getOrCreateStdNamespace(); 2915 2916 CXXRecordDecl *getStdBadAlloc() const; 2917 2918 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2919 /// it is and Element is not NULL, assigns the element type to Element. 2920 bool isStdInitializerList(QualType Ty, QualType *Element); 2921 2922 /// \brief Looks for the std::initializer_list template and instantiates it 2923 /// with Element, or emits an error if it's not found. 2924 /// 2925 /// \returns The instantiated template, or null on error. 2926 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2927 2928 /// \brief Determine whether Ctor is an initializer-list constructor, as 2929 /// defined in [dcl.init.list]p2. 2930 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2931 2932 Decl *ActOnUsingDirective(Scope *CurScope, 2933 SourceLocation UsingLoc, 2934 SourceLocation NamespcLoc, 2935 CXXScopeSpec &SS, 2936 SourceLocation IdentLoc, 2937 IdentifierInfo *NamespcName, 2938 AttributeList *AttrList); 2939 2940 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2941 2942 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2943 SourceLocation NamespaceLoc, 2944 SourceLocation AliasLoc, 2945 IdentifierInfo *Alias, 2946 CXXScopeSpec &SS, 2947 SourceLocation IdentLoc, 2948 IdentifierInfo *Ident); 2949 2950 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2951 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2952 const LookupResult &PreviousDecls); 2953 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2954 NamedDecl *Target); 2955 2956 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2957 bool isTypeName, 2958 const CXXScopeSpec &SS, 2959 SourceLocation NameLoc, 2960 const LookupResult &Previous); 2961 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2962 const CXXScopeSpec &SS, 2963 SourceLocation NameLoc); 2964 2965 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2966 SourceLocation UsingLoc, 2967 CXXScopeSpec &SS, 2968 const DeclarationNameInfo &NameInfo, 2969 AttributeList *AttrList, 2970 bool IsInstantiation, 2971 bool IsTypeName, 2972 SourceLocation TypenameLoc); 2973 2974 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2975 2976 Decl *ActOnUsingDeclaration(Scope *CurScope, 2977 AccessSpecifier AS, 2978 bool HasUsingKeyword, 2979 SourceLocation UsingLoc, 2980 CXXScopeSpec &SS, 2981 UnqualifiedId &Name, 2982 AttributeList *AttrList, 2983 bool IsTypeName, 2984 SourceLocation TypenameLoc); 2985 Decl *ActOnAliasDeclaration(Scope *CurScope, 2986 AccessSpecifier AS, 2987 MultiTemplateParamsArg TemplateParams, 2988 SourceLocation UsingLoc, 2989 UnqualifiedId &Name, 2990 TypeResult Type); 2991 2992 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2993 /// and sets it as the initializer for the the passed in VarDecl. 2994 bool InitializeVarWithConstructor(VarDecl *VD, 2995 CXXConstructorDecl *Constructor, 2996 MultiExprArg Exprs, 2997 bool HadMultipleCandidates); 2998 2999 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 3000 /// including handling of its default argument expressions. 3001 /// 3002 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 3003 ExprResult 3004 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3005 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 3006 bool HadMultipleCandidates, bool RequiresZeroInit, 3007 unsigned ConstructKind, SourceRange ParenRange); 3008 3009 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 3010 // the constructor can be elidable? 3011 ExprResult 3012 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3013 CXXConstructorDecl *Constructor, bool Elidable, 3014 MultiExprArg Exprs, bool HadMultipleCandidates, 3015 bool RequiresZeroInit, unsigned ConstructKind, 3016 SourceRange ParenRange); 3017 3018 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 3019 /// the default expr if needed. 3020 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 3021 FunctionDecl *FD, 3022 ParmVarDecl *Param); 3023 3024 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 3025 /// constructed variable. 3026 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 3027 3028 /// \brief Helper class that collects exception specifications for 3029 /// implicitly-declared special member functions. 3030 class ImplicitExceptionSpecification { 3031 // Pointer to allow copying 3032 ASTContext *Context; 3033 // We order exception specifications thus: 3034 // noexcept is the most restrictive, but is only used in C++0x. 3035 // throw() comes next. 3036 // Then a throw(collected exceptions) 3037 // Finally no specification. 3038 // throw(...) is used instead if any called function uses it. 3039 // 3040 // If this exception specification cannot be known yet (for instance, 3041 // because this is the exception specification for a defaulted default 3042 // constructor and we haven't finished parsing the deferred parts of the 3043 // class yet), the C++0x standard does not specify how to behave. We 3044 // record this as an 'unknown' exception specification, which overrules 3045 // any other specification (even 'none', to keep this rule simple). 3046 ExceptionSpecificationType ComputedEST; 3047 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 3048 SmallVector<QualType, 4> Exceptions; 3049 3050 void ClearExceptions() { 3051 ExceptionsSeen.clear(); 3052 Exceptions.clear(); 3053 } 3054 3055 public: 3056 explicit ImplicitExceptionSpecification(ASTContext &Context) 3057 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 3058 if (!Context.getLangOpts().CPlusPlus0x) 3059 ComputedEST = EST_DynamicNone; 3060 } 3061 3062 /// \brief Get the computed exception specification type. 3063 ExceptionSpecificationType getExceptionSpecType() const { 3064 assert(ComputedEST != EST_ComputedNoexcept && 3065 "noexcept(expr) should not be a possible result"); 3066 return ComputedEST; 3067 } 3068 3069 /// \brief The number of exceptions in the exception specification. 3070 unsigned size() const { return Exceptions.size(); } 3071 3072 /// \brief The set of exceptions in the exception specification. 3073 const QualType *data() const { return Exceptions.data(); } 3074 3075 /// \brief Integrate another called method into the collected data. 3076 void CalledDecl(CXXMethodDecl *Method); 3077 3078 /// \brief Integrate an invoked expression into the collected data. 3079 void CalledExpr(Expr *E); 3080 3081 /// \brief Specify that the exception specification can't be detemined yet. 3082 void SetDelayed() { 3083 ClearExceptions(); 3084 ComputedEST = EST_Delayed; 3085 } 3086 3087 FunctionProtoType::ExtProtoInfo getEPI() const { 3088 FunctionProtoType::ExtProtoInfo EPI; 3089 EPI.ExceptionSpecType = getExceptionSpecType(); 3090 EPI.NumExceptions = size(); 3091 EPI.Exceptions = data(); 3092 return EPI; 3093 } 3094 }; 3095 3096 /// \brief Determine what sort of exception specification a defaulted 3097 /// copy constructor of a class will have. 3098 ImplicitExceptionSpecification 3099 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3100 3101 /// \brief Determine what sort of exception specification a defaulted 3102 /// default constructor of a class will have, and whether the parameter 3103 /// will be const. 3104 std::pair<ImplicitExceptionSpecification, bool> 3105 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3106 3107 /// \brief Determine what sort of exception specification a defautled 3108 /// copy assignment operator of a class will have, and whether the 3109 /// parameter will be const. 3110 std::pair<ImplicitExceptionSpecification, bool> 3111 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3112 3113 /// \brief Determine what sort of exception specification a defaulted move 3114 /// constructor of a class will have. 3115 ImplicitExceptionSpecification 3116 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3117 3118 /// \brief Determine what sort of exception specification a defaulted move 3119 /// assignment operator of a class will have. 3120 ImplicitExceptionSpecification 3121 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3122 3123 /// \brief Determine what sort of exception specification a defaulted 3124 /// destructor of a class will have. 3125 ImplicitExceptionSpecification 3126 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3127 3128 /// \brief Determine if a special member function should have a deleted 3129 /// definition when it is defaulted. 3130 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 3131 3132 /// \brief Declare the implicit default constructor for the given class. 3133 /// 3134 /// \param ClassDecl The class declaration into which the implicit 3135 /// default constructor will be added. 3136 /// 3137 /// \returns The implicitly-declared default constructor. 3138 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3139 CXXRecordDecl *ClassDecl); 3140 3141 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3142 /// defining this constructor as the default constructor. 3143 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3144 CXXConstructorDecl *Constructor); 3145 3146 /// \brief Declare the implicit destructor for the given class. 3147 /// 3148 /// \param ClassDecl The class declaration into which the implicit 3149 /// destructor will be added. 3150 /// 3151 /// \returns The implicitly-declared destructor. 3152 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3153 3154 /// DefineImplicitDestructor - Checks for feasibility of 3155 /// defining this destructor as the default destructor. 3156 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3157 CXXDestructorDecl *Destructor); 3158 3159 /// \brief Build an exception spec for destructors that don't have one. 3160 /// 3161 /// C++11 says that user-defined destructors with no exception spec get one 3162 /// that looks as if the destructor was implicitly declared. 3163 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3164 CXXDestructorDecl *Destructor); 3165 3166 /// \brief Declare all inherited constructors for the given class. 3167 /// 3168 /// \param ClassDecl The class declaration into which the inherited 3169 /// constructors will be added. 3170 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3171 3172 /// \brief Declare the implicit copy constructor for the given class. 3173 /// 3174 /// \param ClassDecl The class declaration into which the implicit 3175 /// copy constructor will be added. 3176 /// 3177 /// \returns The implicitly-declared copy constructor. 3178 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3179 3180 /// DefineImplicitCopyConstructor - Checks for feasibility of 3181 /// defining this constructor as the copy constructor. 3182 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3183 CXXConstructorDecl *Constructor); 3184 3185 /// \brief Declare the implicit move constructor for the given class. 3186 /// 3187 /// \param ClassDecl The Class declaration into which the implicit 3188 /// move constructor will be added. 3189 /// 3190 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3191 /// declared. 3192 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3193 3194 /// DefineImplicitMoveConstructor - Checks for feasibility of 3195 /// defining this constructor as the move constructor. 3196 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3197 CXXConstructorDecl *Constructor); 3198 3199 /// \brief Declare the implicit copy assignment operator for the given class. 3200 /// 3201 /// \param ClassDecl The class declaration into which the implicit 3202 /// copy assignment operator will be added. 3203 /// 3204 /// \returns The implicitly-declared copy assignment operator. 3205 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3206 3207 /// \brief Defines an implicitly-declared copy assignment operator. 3208 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3209 CXXMethodDecl *MethodDecl); 3210 3211 /// \brief Declare the implicit move assignment operator for the given class. 3212 /// 3213 /// \param ClassDecl The Class declaration into which the implicit 3214 /// move assignment operator will be added. 3215 /// 3216 /// \returns The implicitly-declared move assignment operator, or NULL if it 3217 /// wasn't declared. 3218 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3219 3220 /// \brief Defines an implicitly-declared move assignment operator. 3221 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3222 CXXMethodDecl *MethodDecl); 3223 3224 /// \brief Force the declaration of any implicitly-declared members of this 3225 /// class. 3226 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3227 3228 /// \brief Determine whether the given function is an implicitly-deleted 3229 /// special member function. 3230 bool isImplicitlyDeleted(FunctionDecl *FD); 3231 3232 /// MaybeBindToTemporary - If the passed in expression has a record type with 3233 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3234 /// it simply returns the passed in expression. 3235 ExprResult MaybeBindToTemporary(Expr *E); 3236 3237 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3238 MultiExprArg ArgsPtr, 3239 SourceLocation Loc, 3240 ASTOwningVector<Expr*> &ConvertedArgs, 3241 bool AllowExplicit = false); 3242 3243 ParsedType getDestructorName(SourceLocation TildeLoc, 3244 IdentifierInfo &II, SourceLocation NameLoc, 3245 Scope *S, CXXScopeSpec &SS, 3246 ParsedType ObjectType, 3247 bool EnteringContext); 3248 3249 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3250 3251 // Checks that reinterpret casts don't have undefined behavior. 3252 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3253 bool IsDereference, SourceRange Range); 3254 3255 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3256 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3257 tok::TokenKind Kind, 3258 SourceLocation LAngleBracketLoc, 3259 Declarator &D, 3260 SourceLocation RAngleBracketLoc, 3261 SourceLocation LParenLoc, 3262 Expr *E, 3263 SourceLocation RParenLoc); 3264 3265 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3266 tok::TokenKind Kind, 3267 TypeSourceInfo *Ty, 3268 Expr *E, 3269 SourceRange AngleBrackets, 3270 SourceRange Parens); 3271 3272 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3273 SourceLocation TypeidLoc, 3274 TypeSourceInfo *Operand, 3275 SourceLocation RParenLoc); 3276 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3277 SourceLocation TypeidLoc, 3278 Expr *Operand, 3279 SourceLocation RParenLoc); 3280 3281 /// ActOnCXXTypeid - Parse typeid( something ). 3282 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3283 SourceLocation LParenLoc, bool isType, 3284 void *TyOrExpr, 3285 SourceLocation RParenLoc); 3286 3287 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3288 SourceLocation TypeidLoc, 3289 TypeSourceInfo *Operand, 3290 SourceLocation RParenLoc); 3291 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3292 SourceLocation TypeidLoc, 3293 Expr *Operand, 3294 SourceLocation RParenLoc); 3295 3296 /// ActOnCXXUuidof - Parse __uuidof( something ). 3297 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3298 SourceLocation LParenLoc, bool isType, 3299 void *TyOrExpr, 3300 SourceLocation RParenLoc); 3301 3302 3303 //// ActOnCXXThis - Parse 'this' pointer. 3304 ExprResult ActOnCXXThis(SourceLocation loc); 3305 3306 /// \brief Try to retrieve the type of the 'this' pointer. 3307 /// 3308 /// \param Capture If true, capture 'this' in this context. 3309 /// 3310 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3311 QualType getCurrentThisType(); 3312 3313 /// \brief Make sure the value of 'this' is actually available in the current 3314 /// context, if it is a potentially evaluated context. 3315 /// 3316 /// \param Loc The location at which the capture of 'this' occurs. 3317 /// 3318 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3319 /// capture list. 3320 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3321 3322 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3323 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3324 3325 3326 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. 3327 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3328 3329 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3330 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3331 3332 //// ActOnCXXThrow - Parse throw expressions. 3333 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3334 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3335 bool IsThrownVarInScope); 3336 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3337 bool IsThrownVarInScope); 3338 3339 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3340 /// Can be interpreted either as function-style casting ("int(x)") 3341 /// or class type construction ("ClassType(x,y,z)") 3342 /// or creation of a value-initialized type ("int()"). 3343 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3344 SourceLocation LParenLoc, 3345 MultiExprArg Exprs, 3346 SourceLocation RParenLoc); 3347 3348 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3349 SourceLocation LParenLoc, 3350 MultiExprArg Exprs, 3351 SourceLocation RParenLoc); 3352 3353 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3354 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3355 SourceLocation PlacementLParen, 3356 MultiExprArg PlacementArgs, 3357 SourceLocation PlacementRParen, 3358 SourceRange TypeIdParens, Declarator &D, 3359 Expr *Initializer); 3360 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3361 SourceLocation PlacementLParen, 3362 MultiExprArg PlacementArgs, 3363 SourceLocation PlacementRParen, 3364 SourceRange TypeIdParens, 3365 QualType AllocType, 3366 TypeSourceInfo *AllocTypeInfo, 3367 Expr *ArraySize, 3368 SourceRange DirectInitRange, 3369 Expr *Initializer, 3370 bool TypeMayContainAuto = true); 3371 3372 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3373 SourceRange R); 3374 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3375 bool UseGlobal, QualType AllocType, bool IsArray, 3376 Expr **PlaceArgs, unsigned NumPlaceArgs, 3377 FunctionDecl *&OperatorNew, 3378 FunctionDecl *&OperatorDelete); 3379 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3380 DeclarationName Name, Expr** Args, 3381 unsigned NumArgs, DeclContext *Ctx, 3382 bool AllowMissing, FunctionDecl *&Operator, 3383 bool Diagnose = true); 3384 void DeclareGlobalNewDelete(); 3385 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3386 QualType Argument, 3387 bool addMallocAttr = false); 3388 3389 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3390 DeclarationName Name, FunctionDecl* &Operator, 3391 bool Diagnose = true); 3392 3393 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3394 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3395 bool UseGlobal, bool ArrayForm, 3396 Expr *Operand); 3397 3398 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3399 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3400 SourceLocation StmtLoc, 3401 bool ConvertToBoolean); 3402 3403 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3404 Expr *Operand, SourceLocation RParen); 3405 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3406 SourceLocation RParen); 3407 3408 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3409 /// pseudo-functions. 3410 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3411 SourceLocation KWLoc, 3412 ParsedType Ty, 3413 SourceLocation RParen); 3414 3415 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3416 SourceLocation KWLoc, 3417 TypeSourceInfo *T, 3418 SourceLocation RParen); 3419 3420 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3421 /// pseudo-functions. 3422 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3423 SourceLocation KWLoc, 3424 ParsedType LhsTy, 3425 ParsedType RhsTy, 3426 SourceLocation RParen); 3427 3428 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3429 SourceLocation KWLoc, 3430 TypeSourceInfo *LhsT, 3431 TypeSourceInfo *RhsT, 3432 SourceLocation RParen); 3433 3434 /// \brief Parsed one of the type trait support pseudo-functions. 3435 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3436 ArrayRef<ParsedType> Args, 3437 SourceLocation RParenLoc); 3438 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3439 ArrayRef<TypeSourceInfo *> Args, 3440 SourceLocation RParenLoc); 3441 3442 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3443 /// pseudo-functions. 3444 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3445 SourceLocation KWLoc, 3446 ParsedType LhsTy, 3447 Expr *DimExpr, 3448 SourceLocation RParen); 3449 3450 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3451 SourceLocation KWLoc, 3452 TypeSourceInfo *TSInfo, 3453 Expr *DimExpr, 3454 SourceLocation RParen); 3455 3456 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3457 /// pseudo-functions. 3458 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3459 SourceLocation KWLoc, 3460 Expr *Queried, 3461 SourceLocation RParen); 3462 3463 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3464 SourceLocation KWLoc, 3465 Expr *Queried, 3466 SourceLocation RParen); 3467 3468 ExprResult ActOnStartCXXMemberReference(Scope *S, 3469 Expr *Base, 3470 SourceLocation OpLoc, 3471 tok::TokenKind OpKind, 3472 ParsedType &ObjectType, 3473 bool &MayBePseudoDestructor); 3474 3475 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3476 3477 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3478 SourceLocation OpLoc, 3479 tok::TokenKind OpKind, 3480 const CXXScopeSpec &SS, 3481 TypeSourceInfo *ScopeType, 3482 SourceLocation CCLoc, 3483 SourceLocation TildeLoc, 3484 PseudoDestructorTypeStorage DestroyedType, 3485 bool HasTrailingLParen); 3486 3487 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3488 SourceLocation OpLoc, 3489 tok::TokenKind OpKind, 3490 CXXScopeSpec &SS, 3491 UnqualifiedId &FirstTypeName, 3492 SourceLocation CCLoc, 3493 SourceLocation TildeLoc, 3494 UnqualifiedId &SecondTypeName, 3495 bool HasTrailingLParen); 3496 3497 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3498 SourceLocation OpLoc, 3499 tok::TokenKind OpKind, 3500 SourceLocation TildeLoc, 3501 const DeclSpec& DS, 3502 bool HasTrailingLParen); 3503 3504 /// MaybeCreateExprWithCleanups - If the current full-expression 3505 /// requires any cleanups, surround it with a ExprWithCleanups node. 3506 /// Otherwise, just returns the passed-in expression. 3507 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3508 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3509 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3510 3511 ExprResult ActOnFinishFullExpr(Expr *Expr); 3512 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3513 3514 // Marks SS invalid if it represents an incomplete type. 3515 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3516 3517 DeclContext *computeDeclContext(QualType T); 3518 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3519 bool EnteringContext = false); 3520 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3521 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3522 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3523 3524 /// \brief The parser has parsed a global nested-name-specifier '::'. 3525 /// 3526 /// \param S The scope in which this nested-name-specifier occurs. 3527 /// 3528 /// \param CCLoc The location of the '::'. 3529 /// 3530 /// \param SS The nested-name-specifier, which will be updated in-place 3531 /// to reflect the parsed nested-name-specifier. 3532 /// 3533 /// \returns true if an error occurred, false otherwise. 3534 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3535 CXXScopeSpec &SS); 3536 3537 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3538 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3539 3540 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3541 SourceLocation IdLoc, 3542 IdentifierInfo &II, 3543 ParsedType ObjectType); 3544 3545 bool BuildCXXNestedNameSpecifier(Scope *S, 3546 IdentifierInfo &Identifier, 3547 SourceLocation IdentifierLoc, 3548 SourceLocation CCLoc, 3549 QualType ObjectType, 3550 bool EnteringContext, 3551 CXXScopeSpec &SS, 3552 NamedDecl *ScopeLookupResult, 3553 bool ErrorRecoveryLookup); 3554 3555 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3556 /// 3557 /// \param S The scope in which this nested-name-specifier occurs. 3558 /// 3559 /// \param Identifier The identifier preceding the '::'. 3560 /// 3561 /// \param IdentifierLoc The location of the identifier. 3562 /// 3563 /// \param CCLoc The location of the '::'. 3564 /// 3565 /// \param ObjectType The type of the object, if we're parsing 3566 /// nested-name-specifier in a member access expression. 3567 /// 3568 /// \param EnteringContext Whether we're entering the context nominated by 3569 /// this nested-name-specifier. 3570 /// 3571 /// \param SS The nested-name-specifier, which is both an input 3572 /// parameter (the nested-name-specifier before this type) and an 3573 /// output parameter (containing the full nested-name-specifier, 3574 /// including this new type). 3575 /// 3576 /// \returns true if an error occurred, false otherwise. 3577 bool ActOnCXXNestedNameSpecifier(Scope *S, 3578 IdentifierInfo &Identifier, 3579 SourceLocation IdentifierLoc, 3580 SourceLocation CCLoc, 3581 ParsedType ObjectType, 3582 bool EnteringContext, 3583 CXXScopeSpec &SS); 3584 3585 ExprResult ActOnDecltypeExpression(Expr *E); 3586 3587 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3588 const DeclSpec &DS, 3589 SourceLocation ColonColonLoc); 3590 3591 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3592 IdentifierInfo &Identifier, 3593 SourceLocation IdentifierLoc, 3594 SourceLocation ColonLoc, 3595 ParsedType ObjectType, 3596 bool EnteringContext); 3597 3598 /// \brief The parser has parsed a nested-name-specifier 3599 /// 'template[opt] template-name < template-args >::'. 3600 /// 3601 /// \param S The scope in which this nested-name-specifier occurs. 3602 /// 3603 /// \param SS The nested-name-specifier, which is both an input 3604 /// parameter (the nested-name-specifier before this type) and an 3605 /// output parameter (containing the full nested-name-specifier, 3606 /// including this new type). 3607 /// 3608 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3609 /// \param TemplateName The template name. 3610 /// \param TemplateNameLoc The location of the template name. 3611 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3612 /// \param TemplateArgs The template arguments. 3613 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3614 /// \param CCLoc The location of the '::'. 3615 /// 3616 /// \param EnteringContext Whether we're entering the context of the 3617 /// nested-name-specifier. 3618 /// 3619 /// 3620 /// \returns true if an error occurred, false otherwise. 3621 bool ActOnCXXNestedNameSpecifier(Scope *S, 3622 CXXScopeSpec &SS, 3623 SourceLocation TemplateKWLoc, 3624 TemplateTy Template, 3625 SourceLocation TemplateNameLoc, 3626 SourceLocation LAngleLoc, 3627 ASTTemplateArgsPtr TemplateArgs, 3628 SourceLocation RAngleLoc, 3629 SourceLocation CCLoc, 3630 bool EnteringContext); 3631 3632 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3633 /// that the parser can use later to reconstruct the given 3634 /// nested-name-specifier. 3635 /// 3636 /// \param SS A nested-name-specifier. 3637 /// 3638 /// \returns A pointer containing all of the information in the 3639 /// nested-name-specifier \p SS. 3640 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3641 3642 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3643 /// the nested-name-specifier structure. 3644 /// 3645 /// \param Annotation The annotation pointer, produced by 3646 /// \c SaveNestedNameSpecifierAnnotation(). 3647 /// 3648 /// \param AnnotationRange The source range corresponding to the annotation. 3649 /// 3650 /// \param SS The nested-name-specifier that will be updated with the contents 3651 /// of the annotation pointer. 3652 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3653 SourceRange AnnotationRange, 3654 CXXScopeSpec &SS); 3655 3656 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3657 3658 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3659 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3660 /// After this method is called, according to [C++ 3.4.3p3], names should be 3661 /// looked up in the declarator-id's scope, until the declarator is parsed and 3662 /// ActOnCXXExitDeclaratorScope is called. 3663 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3664 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3665 3666 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3667 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3668 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3669 /// Used to indicate that names should revert to being looked up in the 3670 /// defining scope. 3671 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3672 3673 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3674 /// initializer for the declaration 'Dcl'. 3675 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3676 /// static data member of class X, names should be looked up in the scope of 3677 /// class X. 3678 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3679 3680 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3681 /// initializer for the declaration 'Dcl'. 3682 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3683 3684 /// \brief Create a new lambda closure type. 3685 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3686 bool KnownDependent = false); 3687 3688 /// \brief Start the definition of a lambda expression. 3689 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3690 SourceRange IntroducerRange, 3691 TypeSourceInfo *MethodType, 3692 SourceLocation EndLoc, 3693 llvm::ArrayRef<ParmVarDecl *> Params); 3694 3695 /// \brief Introduce the scope for a lambda expression. 3696 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3697 SourceRange IntroducerRange, 3698 LambdaCaptureDefault CaptureDefault, 3699 bool ExplicitParams, 3700 bool ExplicitResultType, 3701 bool Mutable); 3702 3703 /// \brief Note that we have finished the explicit captures for the 3704 /// given lambda. 3705 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3706 3707 /// \brief Introduce the lambda parameters into scope. 3708 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3709 3710 /// ActOnStartOfLambdaDefinition - This is called just before we start 3711 /// parsing the body of a lambda; it analyzes the explicit captures and 3712 /// arguments, and sets up various data-structures for the body of the 3713 /// lambda. 3714 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3715 Declarator &ParamInfo, Scope *CurScope); 3716 3717 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3718 /// is invoked to pop the information about the lambda. 3719 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3720 bool IsInstantiation = false); 3721 3722 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3723 /// was successfully completed. 3724 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3725 Scope *CurScope, 3726 llvm::Optional<unsigned> ManglingNumber 3727 = llvm::Optional<unsigned>(), 3728 Decl *ContextDecl = 0, 3729 bool IsInstantiation = false); 3730 3731 /// \brief Define the "body" of the conversion from a lambda object to a 3732 /// function pointer. 3733 /// 3734 /// This routine doesn't actually define a sensible body; rather, it fills 3735 /// in the initialization expression needed to copy the lambda object into 3736 /// the block, and IR generation actually generates the real body of the 3737 /// block pointer conversion. 3738 void DefineImplicitLambdaToFunctionPointerConversion( 3739 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3740 3741 /// \brief Define the "body" of the conversion from a lambda object to a 3742 /// block pointer. 3743 /// 3744 /// This routine doesn't actually define a sensible body; rather, it fills 3745 /// in the initialization expression needed to copy the lambda object into 3746 /// the block, and IR generation actually generates the real body of the 3747 /// block pointer conversion. 3748 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3749 CXXConversionDecl *Conv); 3750 3751 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation, 3752 SourceLocation ConvLocation, 3753 CXXConversionDecl *Conv, 3754 Expr *Src); 3755 3756 // ParseObjCStringLiteral - Parse Objective-C string literals. 3757 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3758 Expr **Strings, 3759 unsigned NumStrings); 3760 3761 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S); 3762 3763 /// BuildObjCNumericLiteral - builds an ObjCNumericLiteral AST node for the 3764 /// numeric literal expression. Type of the expression will be "NSNumber *" 3765 /// or "id" if NSNumber is unavailable. 3766 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number); 3767 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc, 3768 bool Value); 3769 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements); 3770 3771 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr, 3772 Expr *IndexExpr, 3773 ObjCMethodDecl *getterMethod, 3774 ObjCMethodDecl *setterMethod); 3775 3776 ExprResult BuildObjCDictionaryLiteral(SourceRange SR, 3777 ObjCDictionaryElement *Elements, 3778 unsigned NumElements); 3779 3780 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3781 TypeSourceInfo *EncodedTypeInfo, 3782 SourceLocation RParenLoc); 3783 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3784 CXXConversionDecl *Method, 3785 bool HadMultipleCandidates); 3786 3787 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3788 SourceLocation EncodeLoc, 3789 SourceLocation LParenLoc, 3790 ParsedType Ty, 3791 SourceLocation RParenLoc); 3792 3793 // ParseObjCSelectorExpression - Build selector expression for @selector 3794 ExprResult ParseObjCSelectorExpression(Selector Sel, 3795 SourceLocation AtLoc, 3796 SourceLocation SelLoc, 3797 SourceLocation LParenLoc, 3798 SourceLocation RParenLoc); 3799 3800 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3801 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3802 SourceLocation AtLoc, 3803 SourceLocation ProtoLoc, 3804 SourceLocation LParenLoc, 3805 SourceLocation RParenLoc); 3806 3807 //===--------------------------------------------------------------------===// 3808 // C++ Declarations 3809 // 3810 Decl *ActOnStartLinkageSpecification(Scope *S, 3811 SourceLocation ExternLoc, 3812 SourceLocation LangLoc, 3813 StringRef Lang, 3814 SourceLocation LBraceLoc); 3815 Decl *ActOnFinishLinkageSpecification(Scope *S, 3816 Decl *LinkageSpec, 3817 SourceLocation RBraceLoc); 3818 3819 3820 //===--------------------------------------------------------------------===// 3821 // C++ Classes 3822 // 3823 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3824 const CXXScopeSpec *SS = 0); 3825 3826 bool ActOnAccessSpecifier(AccessSpecifier Access, 3827 SourceLocation ASLoc, 3828 SourceLocation ColonLoc, 3829 AttributeList *Attrs = 0); 3830 3831 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3832 Declarator &D, 3833 MultiTemplateParamsArg TemplateParameterLists, 3834 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3835 bool HasDeferredInit); 3836 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3837 Expr *Init); 3838 3839 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3840 Scope *S, 3841 CXXScopeSpec &SS, 3842 IdentifierInfo *MemberOrBase, 3843 ParsedType TemplateTypeTy, 3844 const DeclSpec &DS, 3845 SourceLocation IdLoc, 3846 SourceLocation LParenLoc, 3847 Expr **Args, unsigned NumArgs, 3848 SourceLocation RParenLoc, 3849 SourceLocation EllipsisLoc); 3850 3851 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3852 Scope *S, 3853 CXXScopeSpec &SS, 3854 IdentifierInfo *MemberOrBase, 3855 ParsedType TemplateTypeTy, 3856 const DeclSpec &DS, 3857 SourceLocation IdLoc, 3858 Expr *InitList, 3859 SourceLocation EllipsisLoc); 3860 3861 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3862 Scope *S, 3863 CXXScopeSpec &SS, 3864 IdentifierInfo *MemberOrBase, 3865 ParsedType TemplateTypeTy, 3866 const DeclSpec &DS, 3867 SourceLocation IdLoc, 3868 Expr *Init, 3869 SourceLocation EllipsisLoc); 3870 3871 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3872 Expr *Init, 3873 SourceLocation IdLoc); 3874 3875 MemInitResult BuildBaseInitializer(QualType BaseType, 3876 TypeSourceInfo *BaseTInfo, 3877 Expr *Init, 3878 CXXRecordDecl *ClassDecl, 3879 SourceLocation EllipsisLoc); 3880 3881 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3882 Expr *Init, 3883 CXXRecordDecl *ClassDecl); 3884 3885 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3886 CXXCtorInitializer *Initializer); 3887 3888 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3889 CXXCtorInitializer **Initializers, 3890 unsigned NumInitializers, bool AnyErrors); 3891 3892 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3893 3894 3895 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3896 /// mark all the non-trivial destructors of its members and bases as 3897 /// referenced. 3898 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3899 CXXRecordDecl *Record); 3900 3901 /// \brief The list of classes whose vtables have been used within 3902 /// this translation unit, and the source locations at which the 3903 /// first use occurred. 3904 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3905 3906 /// \brief The list of vtables that are required but have not yet been 3907 /// materialized. 3908 SmallVector<VTableUse, 16> VTableUses; 3909 3910 /// \brief The set of classes whose vtables have been used within 3911 /// this translation unit, and a bit that will be true if the vtable is 3912 /// required to be emitted (otherwise, it should be emitted only if needed 3913 /// by code generation). 3914 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3915 3916 /// \brief Load any externally-stored vtable uses. 3917 void LoadExternalVTableUses(); 3918 3919 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3920 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3921 DynamicClassesType; 3922 3923 /// \brief A list of all of the dynamic classes in this translation 3924 /// unit. 3925 DynamicClassesType DynamicClasses; 3926 3927 /// \brief Note that the vtable for the given class was used at the 3928 /// given location. 3929 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3930 bool DefinitionRequired = false); 3931 3932 /// MarkVirtualMembersReferenced - Will mark all members of the given 3933 /// CXXRecordDecl referenced. 3934 void MarkVirtualMembersReferenced(SourceLocation Loc, 3935 const CXXRecordDecl *RD); 3936 3937 /// \brief Define all of the vtables that have been used in this 3938 /// translation unit and reference any virtual members used by those 3939 /// vtables. 3940 /// 3941 /// \returns true if any work was done, false otherwise. 3942 bool DefineUsedVTables(); 3943 3944 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3945 3946 void ActOnMemInitializers(Decl *ConstructorDecl, 3947 SourceLocation ColonLoc, 3948 CXXCtorInitializer **MemInits, 3949 unsigned NumMemInits, 3950 bool AnyErrors); 3951 3952 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3953 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3954 Decl *TagDecl, 3955 SourceLocation LBrac, 3956 SourceLocation RBrac, 3957 AttributeList *AttrList); 3958 3959 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3960 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3961 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3962 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3963 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3964 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3965 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3966 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3967 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3968 bool IsInsideALocalClassWithinATemplateFunction(); 3969 3970 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3971 Expr *AssertExpr, 3972 Expr *AssertMessageExpr, 3973 SourceLocation RParenLoc); 3974 3975 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3976 SourceLocation FriendLoc, 3977 TypeSourceInfo *TSInfo); 3978 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3979 MultiTemplateParamsArg TemplateParams); 3980 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3981 MultiTemplateParamsArg TemplateParams); 3982 3983 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3984 StorageClass& SC); 3985 void CheckConstructor(CXXConstructorDecl *Constructor); 3986 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3987 StorageClass& SC); 3988 bool CheckDestructor(CXXDestructorDecl *Destructor); 3989 void CheckConversionDeclarator(Declarator &D, QualType &R, 3990 StorageClass& SC); 3991 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3992 3993 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3994 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3995 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3996 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3997 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3998 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3999 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 4000 4001 //===--------------------------------------------------------------------===// 4002 // C++ Derived Classes 4003 // 4004 4005 /// ActOnBaseSpecifier - Parsed a base specifier 4006 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 4007 SourceRange SpecifierRange, 4008 bool Virtual, AccessSpecifier Access, 4009 TypeSourceInfo *TInfo, 4010 SourceLocation EllipsisLoc); 4011 4012 BaseResult ActOnBaseSpecifier(Decl *classdecl, 4013 SourceRange SpecifierRange, 4014 bool Virtual, AccessSpecifier Access, 4015 ParsedType basetype, 4016 SourceLocation BaseLoc, 4017 SourceLocation EllipsisLoc); 4018 4019 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 4020 unsigned NumBases); 4021 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 4022 unsigned NumBases); 4023 4024 bool IsDerivedFrom(QualType Derived, QualType Base); 4025 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 4026 4027 // FIXME: I don't like this name. 4028 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 4029 4030 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 4031 4032 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4033 SourceLocation Loc, SourceRange Range, 4034 CXXCastPath *BasePath = 0, 4035 bool IgnoreAccess = false); 4036 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4037 unsigned InaccessibleBaseID, 4038 unsigned AmbigiousBaseConvID, 4039 SourceLocation Loc, SourceRange Range, 4040 DeclarationName Name, 4041 CXXCastPath *BasePath); 4042 4043 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 4044 4045 /// CheckOverridingFunctionReturnType - Checks whether the return types are 4046 /// covariant, according to C++ [class.virtual]p5. 4047 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 4048 const CXXMethodDecl *Old); 4049 4050 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 4051 /// spec is a subset of base spec. 4052 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 4053 const CXXMethodDecl *Old); 4054 4055 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 4056 4057 /// CheckOverrideControl - Check C++0x override control semantics. 4058 void CheckOverrideControl(const Decl *D); 4059 4060 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 4061 /// overrides a virtual member function marked 'final', according to 4062 /// C++0x [class.virtual]p3. 4063 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 4064 const CXXMethodDecl *Old); 4065 4066 4067 //===--------------------------------------------------------------------===// 4068 // C++ Access Control 4069 // 4070 4071 enum AccessResult { 4072 AR_accessible, 4073 AR_inaccessible, 4074 AR_dependent, 4075 AR_delayed 4076 }; 4077 4078 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 4079 NamedDecl *PrevMemberDecl, 4080 AccessSpecifier LexicalAS); 4081 4082 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 4083 DeclAccessPair FoundDecl); 4084 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 4085 DeclAccessPair FoundDecl); 4086 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 4087 SourceRange PlacementRange, 4088 CXXRecordDecl *NamingClass, 4089 DeclAccessPair FoundDecl, 4090 bool Diagnose = true); 4091 AccessResult CheckConstructorAccess(SourceLocation Loc, 4092 CXXConstructorDecl *D, 4093 const InitializedEntity &Entity, 4094 AccessSpecifier Access, 4095 bool IsCopyBindingRefToTemp = false); 4096 AccessResult CheckConstructorAccess(SourceLocation Loc, 4097 CXXConstructorDecl *D, 4098 AccessSpecifier Access, 4099 PartialDiagnostic PD); 4100 AccessResult CheckDestructorAccess(SourceLocation Loc, 4101 CXXDestructorDecl *Dtor, 4102 const PartialDiagnostic &PDiag); 4103 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 4104 NamedDecl *D, 4105 const PartialDiagnostic &PDiag); 4106 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 4107 Expr *ObjectExpr, 4108 Expr *ArgExpr, 4109 DeclAccessPair FoundDecl); 4110 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 4111 DeclAccessPair FoundDecl); 4112 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 4113 QualType Base, QualType Derived, 4114 const CXXBasePath &Path, 4115 unsigned DiagID, 4116 bool ForceCheck = false, 4117 bool ForceUnprivileged = false); 4118 void CheckLookupAccess(const LookupResult &R); 4119 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 4120 4121 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 4122 const MultiLevelTemplateArgumentList &TemplateArgs); 4123 void PerformDependentDiagnostics(const DeclContext *Pattern, 4124 const MultiLevelTemplateArgumentList &TemplateArgs); 4125 4126 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4127 4128 /// A flag to suppress access checking. 4129 bool SuppressAccessChecking; 4130 4131 /// \brief When true, access checking violations are treated as SFINAE 4132 /// failures rather than hard errors. 4133 bool AccessCheckingSFINAE; 4134 4135 /// \brief RAII object used to temporarily suppress access checking. 4136 class SuppressAccessChecksRAII { 4137 Sema &S; 4138 bool SuppressingAccess; 4139 4140 public: 4141 SuppressAccessChecksRAII(Sema &S, bool Suppress) 4142 : S(S), SuppressingAccess(Suppress) { 4143 if (Suppress) S.ActOnStartSuppressingAccessChecks(); 4144 } 4145 ~SuppressAccessChecksRAII() { 4146 done(); 4147 } 4148 void done() { 4149 if (!SuppressingAccess) return; 4150 S.ActOnStopSuppressingAccessChecks(); 4151 SuppressingAccess = false; 4152 } 4153 }; 4154 4155 void ActOnStartSuppressingAccessChecks(); 4156 void ActOnStopSuppressingAccessChecks(); 4157 4158 enum AbstractDiagSelID { 4159 AbstractNone = -1, 4160 AbstractReturnType, 4161 AbstractParamType, 4162 AbstractVariableType, 4163 AbstractFieldType, 4164 AbstractArrayType 4165 }; 4166 4167 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4168 const PartialDiagnostic &PD); 4169 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4170 4171 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4172 AbstractDiagSelID SelID = AbstractNone); 4173 4174 //===--------------------------------------------------------------------===// 4175 // C++ Overloaded Operators [C++ 13.5] 4176 // 4177 4178 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4179 4180 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4181 4182 //===--------------------------------------------------------------------===// 4183 // C++ Templates [C++ 14] 4184 // 4185 void FilterAcceptableTemplateNames(LookupResult &R, 4186 bool AllowFunctionTemplates = true); 4187 bool hasAnyAcceptableTemplateNames(LookupResult &R, 4188 bool AllowFunctionTemplates = true); 4189 4190 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4191 QualType ObjectType, bool EnteringContext, 4192 bool &MemberOfUnknownSpecialization); 4193 4194 TemplateNameKind isTemplateName(Scope *S, 4195 CXXScopeSpec &SS, 4196 bool hasTemplateKeyword, 4197 UnqualifiedId &Name, 4198 ParsedType ObjectType, 4199 bool EnteringContext, 4200 TemplateTy &Template, 4201 bool &MemberOfUnknownSpecialization); 4202 4203 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4204 SourceLocation IILoc, 4205 Scope *S, 4206 const CXXScopeSpec *SS, 4207 TemplateTy &SuggestedTemplate, 4208 TemplateNameKind &SuggestedKind); 4209 4210 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4211 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4212 4213 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4214 SourceLocation EllipsisLoc, 4215 SourceLocation KeyLoc, 4216 IdentifierInfo *ParamName, 4217 SourceLocation ParamNameLoc, 4218 unsigned Depth, unsigned Position, 4219 SourceLocation EqualLoc, 4220 ParsedType DefaultArg); 4221 4222 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4223 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4224 unsigned Depth, 4225 unsigned Position, 4226 SourceLocation EqualLoc, 4227 Expr *DefaultArg); 4228 Decl *ActOnTemplateTemplateParameter(Scope *S, 4229 SourceLocation TmpLoc, 4230 TemplateParameterList *Params, 4231 SourceLocation EllipsisLoc, 4232 IdentifierInfo *ParamName, 4233 SourceLocation ParamNameLoc, 4234 unsigned Depth, 4235 unsigned Position, 4236 SourceLocation EqualLoc, 4237 ParsedTemplateArgument DefaultArg); 4238 4239 TemplateParameterList * 4240 ActOnTemplateParameterList(unsigned Depth, 4241 SourceLocation ExportLoc, 4242 SourceLocation TemplateLoc, 4243 SourceLocation LAngleLoc, 4244 Decl **Params, unsigned NumParams, 4245 SourceLocation RAngleLoc); 4246 4247 /// \brief The context in which we are checking a template parameter 4248 /// list. 4249 enum TemplateParamListContext { 4250 TPC_ClassTemplate, 4251 TPC_FunctionTemplate, 4252 TPC_ClassTemplateMember, 4253 TPC_FriendFunctionTemplate, 4254 TPC_FriendFunctionTemplateDefinition, 4255 TPC_TypeAliasTemplate 4256 }; 4257 4258 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4259 TemplateParameterList *OldParams, 4260 TemplateParamListContext TPC); 4261 TemplateParameterList * 4262 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4263 SourceLocation DeclLoc, 4264 const CXXScopeSpec &SS, 4265 TemplateParameterList **ParamLists, 4266 unsigned NumParamLists, 4267 bool IsFriend, 4268 bool &IsExplicitSpecialization, 4269 bool &Invalid); 4270 4271 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4272 SourceLocation KWLoc, CXXScopeSpec &SS, 4273 IdentifierInfo *Name, SourceLocation NameLoc, 4274 AttributeList *Attr, 4275 TemplateParameterList *TemplateParams, 4276 AccessSpecifier AS, 4277 SourceLocation ModulePrivateLoc, 4278 unsigned NumOuterTemplateParamLists, 4279 TemplateParameterList **OuterTemplateParamLists); 4280 4281 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4282 TemplateArgumentListInfo &Out); 4283 4284 void NoteAllFoundTemplates(TemplateName Name); 4285 4286 QualType CheckTemplateIdType(TemplateName Template, 4287 SourceLocation TemplateLoc, 4288 TemplateArgumentListInfo &TemplateArgs); 4289 4290 TypeResult 4291 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4292 TemplateTy Template, SourceLocation TemplateLoc, 4293 SourceLocation LAngleLoc, 4294 ASTTemplateArgsPtr TemplateArgs, 4295 SourceLocation RAngleLoc, 4296 bool IsCtorOrDtorName = false); 4297 4298 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4299 /// such as \c class T::template apply<U>. 4300 /// 4301 /// \param TUK 4302 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4303 TypeSpecifierType TagSpec, 4304 SourceLocation TagLoc, 4305 CXXScopeSpec &SS, 4306 SourceLocation TemplateKWLoc, 4307 TemplateTy TemplateD, 4308 SourceLocation TemplateLoc, 4309 SourceLocation LAngleLoc, 4310 ASTTemplateArgsPtr TemplateArgsIn, 4311 SourceLocation RAngleLoc); 4312 4313 4314 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4315 SourceLocation TemplateKWLoc, 4316 LookupResult &R, 4317 bool RequiresADL, 4318 const TemplateArgumentListInfo *TemplateArgs); 4319 4320 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4321 SourceLocation TemplateKWLoc, 4322 const DeclarationNameInfo &NameInfo, 4323 const TemplateArgumentListInfo *TemplateArgs); 4324 4325 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4326 CXXScopeSpec &SS, 4327 SourceLocation TemplateKWLoc, 4328 UnqualifiedId &Name, 4329 ParsedType ObjectType, 4330 bool EnteringContext, 4331 TemplateTy &Template); 4332 4333 DeclResult 4334 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4335 SourceLocation KWLoc, 4336 SourceLocation ModulePrivateLoc, 4337 CXXScopeSpec &SS, 4338 TemplateTy Template, 4339 SourceLocation TemplateNameLoc, 4340 SourceLocation LAngleLoc, 4341 ASTTemplateArgsPtr TemplateArgs, 4342 SourceLocation RAngleLoc, 4343 AttributeList *Attr, 4344 MultiTemplateParamsArg TemplateParameterLists); 4345 4346 Decl *ActOnTemplateDeclarator(Scope *S, 4347 MultiTemplateParamsArg TemplateParameterLists, 4348 Declarator &D); 4349 4350 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4351 MultiTemplateParamsArg TemplateParameterLists, 4352 Declarator &D); 4353 4354 bool 4355 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4356 TemplateSpecializationKind NewTSK, 4357 NamedDecl *PrevDecl, 4358 TemplateSpecializationKind PrevTSK, 4359 SourceLocation PrevPtOfInstantiation, 4360 bool &SuppressNew); 4361 4362 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4363 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4364 LookupResult &Previous); 4365 4366 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4367 TemplateArgumentListInfo *ExplicitTemplateArgs, 4368 LookupResult &Previous); 4369 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4370 4371 DeclResult 4372 ActOnExplicitInstantiation(Scope *S, 4373 SourceLocation ExternLoc, 4374 SourceLocation TemplateLoc, 4375 unsigned TagSpec, 4376 SourceLocation KWLoc, 4377 const CXXScopeSpec &SS, 4378 TemplateTy Template, 4379 SourceLocation TemplateNameLoc, 4380 SourceLocation LAngleLoc, 4381 ASTTemplateArgsPtr TemplateArgs, 4382 SourceLocation RAngleLoc, 4383 AttributeList *Attr); 4384 4385 DeclResult 4386 ActOnExplicitInstantiation(Scope *S, 4387 SourceLocation ExternLoc, 4388 SourceLocation TemplateLoc, 4389 unsigned TagSpec, 4390 SourceLocation KWLoc, 4391 CXXScopeSpec &SS, 4392 IdentifierInfo *Name, 4393 SourceLocation NameLoc, 4394 AttributeList *Attr); 4395 4396 DeclResult ActOnExplicitInstantiation(Scope *S, 4397 SourceLocation ExternLoc, 4398 SourceLocation TemplateLoc, 4399 Declarator &D); 4400 4401 TemplateArgumentLoc 4402 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4403 SourceLocation TemplateLoc, 4404 SourceLocation RAngleLoc, 4405 Decl *Param, 4406 SmallVectorImpl<TemplateArgument> &Converted); 4407 4408 /// \brief Specifies the context in which a particular template 4409 /// argument is being checked. 4410 enum CheckTemplateArgumentKind { 4411 /// \brief The template argument was specified in the code or was 4412 /// instantiated with some deduced template arguments. 4413 CTAK_Specified, 4414 4415 /// \brief The template argument was deduced via template argument 4416 /// deduction. 4417 CTAK_Deduced, 4418 4419 /// \brief The template argument was deduced from an array bound 4420 /// via template argument deduction. 4421 CTAK_DeducedFromArrayBound 4422 }; 4423 4424 bool CheckTemplateArgument(NamedDecl *Param, 4425 const TemplateArgumentLoc &Arg, 4426 NamedDecl *Template, 4427 SourceLocation TemplateLoc, 4428 SourceLocation RAngleLoc, 4429 unsigned ArgumentPackIndex, 4430 SmallVectorImpl<TemplateArgument> &Converted, 4431 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4432 4433 /// \brief Check that the given template arguments can be be provided to 4434 /// the given template, converting the arguments along the way. 4435 /// 4436 /// \param Template The template to which the template arguments are being 4437 /// provided. 4438 /// 4439 /// \param TemplateLoc The location of the template name in the source. 4440 /// 4441 /// \param TemplateArgs The list of template arguments. If the template is 4442 /// a template template parameter, this function may extend the set of 4443 /// template arguments to also include substituted, defaulted template 4444 /// arguments. 4445 /// 4446 /// \param PartialTemplateArgs True if the list of template arguments is 4447 /// intentionally partial, e.g., because we're checking just the initial 4448 /// set of template arguments. 4449 /// 4450 /// \param Converted Will receive the converted, canonicalized template 4451 /// arguments. 4452 /// 4453 /// 4454 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4455 /// when the template arguments contain a pack expansion that is being 4456 /// expanded into a fixed parameter list. 4457 /// 4458 /// \returns True if an error occurred, false otherwise. 4459 bool CheckTemplateArgumentList(TemplateDecl *Template, 4460 SourceLocation TemplateLoc, 4461 TemplateArgumentListInfo &TemplateArgs, 4462 bool PartialTemplateArgs, 4463 SmallVectorImpl<TemplateArgument> &Converted, 4464 bool *ExpansionIntoFixedList = 0); 4465 4466 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4467 const TemplateArgumentLoc &Arg, 4468 SmallVectorImpl<TemplateArgument> &Converted); 4469 4470 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4471 TypeSourceInfo *Arg); 4472 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4473 TemplateArgument &Converted); 4474 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4475 QualType InstantiatedParamType, Expr *Arg, 4476 TemplateArgument &Converted, 4477 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4478 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4479 const TemplateArgumentLoc &Arg); 4480 4481 ExprResult 4482 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4483 QualType ParamType, 4484 SourceLocation Loc); 4485 ExprResult 4486 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4487 SourceLocation Loc); 4488 4489 /// \brief Enumeration describing how template parameter lists are compared 4490 /// for equality. 4491 enum TemplateParameterListEqualKind { 4492 /// \brief We are matching the template parameter lists of two templates 4493 /// that might be redeclarations. 4494 /// 4495 /// \code 4496 /// template<typename T> struct X; 4497 /// template<typename T> struct X; 4498 /// \endcode 4499 TPL_TemplateMatch, 4500 4501 /// \brief We are matching the template parameter lists of two template 4502 /// template parameters as part of matching the template parameter lists 4503 /// of two templates that might be redeclarations. 4504 /// 4505 /// \code 4506 /// template<template<int I> class TT> struct X; 4507 /// template<template<int Value> class Other> struct X; 4508 /// \endcode 4509 TPL_TemplateTemplateParmMatch, 4510 4511 /// \brief We are matching the template parameter lists of a template 4512 /// template argument against the template parameter lists of a template 4513 /// template parameter. 4514 /// 4515 /// \code 4516 /// template<template<int Value> class Metafun> struct X; 4517 /// template<int Value> struct integer_c; 4518 /// X<integer_c> xic; 4519 /// \endcode 4520 TPL_TemplateTemplateArgumentMatch 4521 }; 4522 4523 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4524 TemplateParameterList *Old, 4525 bool Complain, 4526 TemplateParameterListEqualKind Kind, 4527 SourceLocation TemplateArgLoc 4528 = SourceLocation()); 4529 4530 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4531 4532 /// \brief Called when the parser has parsed a C++ typename 4533 /// specifier, e.g., "typename T::type". 4534 /// 4535 /// \param S The scope in which this typename type occurs. 4536 /// \param TypenameLoc the location of the 'typename' keyword 4537 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4538 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4539 /// \param IdLoc the location of the identifier. 4540 TypeResult 4541 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4542 const CXXScopeSpec &SS, const IdentifierInfo &II, 4543 SourceLocation IdLoc); 4544 4545 /// \brief Called when the parser has parsed a C++ typename 4546 /// specifier that ends in a template-id, e.g., 4547 /// "typename MetaFun::template apply<T1, T2>". 4548 /// 4549 /// \param S The scope in which this typename type occurs. 4550 /// \param TypenameLoc the location of the 'typename' keyword 4551 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4552 /// \param TemplateLoc the location of the 'template' keyword, if any. 4553 /// \param TemplateName The template name. 4554 /// \param TemplateNameLoc The location of the template name. 4555 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4556 /// \param TemplateArgs The template arguments. 4557 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4558 TypeResult 4559 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4560 const CXXScopeSpec &SS, 4561 SourceLocation TemplateLoc, 4562 TemplateTy Template, 4563 SourceLocation TemplateNameLoc, 4564 SourceLocation LAngleLoc, 4565 ASTTemplateArgsPtr TemplateArgs, 4566 SourceLocation RAngleLoc); 4567 4568 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4569 SourceLocation KeywordLoc, 4570 NestedNameSpecifierLoc QualifierLoc, 4571 const IdentifierInfo &II, 4572 SourceLocation IILoc); 4573 4574 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4575 SourceLocation Loc, 4576 DeclarationName Name); 4577 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4578 4579 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4580 bool RebuildTemplateParamsInCurrentInstantiation( 4581 TemplateParameterList *Params); 4582 4583 std::string 4584 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4585 const TemplateArgumentList &Args); 4586 4587 std::string 4588 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4589 const TemplateArgument *Args, 4590 unsigned NumArgs); 4591 4592 //===--------------------------------------------------------------------===// 4593 // C++ Variadic Templates (C++0x [temp.variadic]) 4594 //===--------------------------------------------------------------------===// 4595 4596 /// \brief The context in which an unexpanded parameter pack is 4597 /// being diagnosed. 4598 /// 4599 /// Note that the values of this enumeration line up with the first 4600 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4601 enum UnexpandedParameterPackContext { 4602 /// \brief An arbitrary expression. 4603 UPPC_Expression = 0, 4604 4605 /// \brief The base type of a class type. 4606 UPPC_BaseType, 4607 4608 /// \brief The type of an arbitrary declaration. 4609 UPPC_DeclarationType, 4610 4611 /// \brief The type of a data member. 4612 UPPC_DataMemberType, 4613 4614 /// \brief The size of a bit-field. 4615 UPPC_BitFieldWidth, 4616 4617 /// \brief The expression in a static assertion. 4618 UPPC_StaticAssertExpression, 4619 4620 /// \brief The fixed underlying type of an enumeration. 4621 UPPC_FixedUnderlyingType, 4622 4623 /// \brief The enumerator value. 4624 UPPC_EnumeratorValue, 4625 4626 /// \brief A using declaration. 4627 UPPC_UsingDeclaration, 4628 4629 /// \brief A friend declaration. 4630 UPPC_FriendDeclaration, 4631 4632 /// \brief A declaration qualifier. 4633 UPPC_DeclarationQualifier, 4634 4635 /// \brief An initializer. 4636 UPPC_Initializer, 4637 4638 /// \brief A default argument. 4639 UPPC_DefaultArgument, 4640 4641 /// \brief The type of a non-type template parameter. 4642 UPPC_NonTypeTemplateParameterType, 4643 4644 /// \brief The type of an exception. 4645 UPPC_ExceptionType, 4646 4647 /// \brief Partial specialization. 4648 UPPC_PartialSpecialization, 4649 4650 /// \brief Microsoft __if_exists. 4651 UPPC_IfExists, 4652 4653 /// \brief Microsoft __if_not_exists. 4654 UPPC_IfNotExists 4655}; 4656 4657 /// \brief Diagnose unexpanded parameter packs. 4658 /// 4659 /// \param Loc The location at which we should emit the diagnostic. 4660 /// 4661 /// \param UPPC The context in which we are diagnosing unexpanded 4662 /// parameter packs. 4663 /// 4664 /// \param Unexpanded the set of unexpanded parameter packs. 4665 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4666 UnexpandedParameterPackContext UPPC, 4667 ArrayRef<UnexpandedParameterPack> Unexpanded); 4668 4669 /// \brief If the given type contains an unexpanded parameter pack, 4670 /// diagnose the error. 4671 /// 4672 /// \param Loc The source location where a diagnostc should be emitted. 4673 /// 4674 /// \param T The type that is being checked for unexpanded parameter 4675 /// packs. 4676 /// 4677 /// \returns true if an error occurred, false otherwise. 4678 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4679 UnexpandedParameterPackContext UPPC); 4680 4681 /// \brief If the given expression contains an unexpanded parameter 4682 /// pack, diagnose the error. 4683 /// 4684 /// \param E The expression that is being checked for unexpanded 4685 /// parameter packs. 4686 /// 4687 /// \returns true if an error occurred, false otherwise. 4688 bool DiagnoseUnexpandedParameterPack(Expr *E, 4689 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4690 4691 /// \brief If the given nested-name-specifier contains an unexpanded 4692 /// parameter pack, diagnose the error. 4693 /// 4694 /// \param SS The nested-name-specifier that is being checked for 4695 /// unexpanded parameter packs. 4696 /// 4697 /// \returns true if an error occurred, false otherwise. 4698 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4699 UnexpandedParameterPackContext UPPC); 4700 4701 /// \brief If the given name contains an unexpanded parameter pack, 4702 /// diagnose the error. 4703 /// 4704 /// \param NameInfo The name (with source location information) that 4705 /// is being checked for unexpanded parameter packs. 4706 /// 4707 /// \returns true if an error occurred, false otherwise. 4708 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4709 UnexpandedParameterPackContext UPPC); 4710 4711 /// \brief If the given template name contains an unexpanded parameter pack, 4712 /// diagnose the error. 4713 /// 4714 /// \param Loc The location of the template name. 4715 /// 4716 /// \param Template The template name that is being checked for unexpanded 4717 /// parameter packs. 4718 /// 4719 /// \returns true if an error occurred, false otherwise. 4720 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4721 TemplateName Template, 4722 UnexpandedParameterPackContext UPPC); 4723 4724 /// \brief If the given template argument contains an unexpanded parameter 4725 /// pack, diagnose the error. 4726 /// 4727 /// \param Arg The template argument that is being checked for unexpanded 4728 /// parameter packs. 4729 /// 4730 /// \returns true if an error occurred, false otherwise. 4731 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4732 UnexpandedParameterPackContext UPPC); 4733 4734 /// \brief Collect the set of unexpanded parameter packs within the given 4735 /// template argument. 4736 /// 4737 /// \param Arg The template argument that will be traversed to find 4738 /// unexpanded parameter packs. 4739 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4740 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4741 4742 /// \brief Collect the set of unexpanded parameter packs within the given 4743 /// template argument. 4744 /// 4745 /// \param Arg The template argument that will be traversed to find 4746 /// unexpanded parameter packs. 4747 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4748 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4749 4750 /// \brief Collect the set of unexpanded parameter packs within the given 4751 /// type. 4752 /// 4753 /// \param T The type that will be traversed to find 4754 /// unexpanded parameter packs. 4755 void collectUnexpandedParameterPacks(QualType T, 4756 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4757 4758 /// \brief Collect the set of unexpanded parameter packs within the given 4759 /// type. 4760 /// 4761 /// \param TL The type that will be traversed to find 4762 /// unexpanded parameter packs. 4763 void collectUnexpandedParameterPacks(TypeLoc TL, 4764 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4765 4766 /// \brief Collect the set of unexpanded parameter packs within the given 4767 /// nested-name-specifier. 4768 /// 4769 /// \param SS The nested-name-specifier that will be traversed to find 4770 /// unexpanded parameter packs. 4771 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4772 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4773 4774 /// \brief Collect the set of unexpanded parameter packs within the given 4775 /// name. 4776 /// 4777 /// \param NameInfo The name that will be traversed to find 4778 /// unexpanded parameter packs. 4779 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4780 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4781 4782 /// \brief Invoked when parsing a template argument followed by an 4783 /// ellipsis, which creates a pack expansion. 4784 /// 4785 /// \param Arg The template argument preceding the ellipsis, which 4786 /// may already be invalid. 4787 /// 4788 /// \param EllipsisLoc The location of the ellipsis. 4789 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4790 SourceLocation EllipsisLoc); 4791 4792 /// \brief Invoked when parsing a type followed by an ellipsis, which 4793 /// creates a pack expansion. 4794 /// 4795 /// \param Type The type preceding the ellipsis, which will become 4796 /// the pattern of the pack expansion. 4797 /// 4798 /// \param EllipsisLoc The location of the ellipsis. 4799 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4800 4801 /// \brief Construct a pack expansion type from the pattern of the pack 4802 /// expansion. 4803 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4804 SourceLocation EllipsisLoc, 4805 llvm::Optional<unsigned> NumExpansions); 4806 4807 /// \brief Construct a pack expansion type from the pattern of the pack 4808 /// expansion. 4809 QualType CheckPackExpansion(QualType Pattern, 4810 SourceRange PatternRange, 4811 SourceLocation EllipsisLoc, 4812 llvm::Optional<unsigned> NumExpansions); 4813 4814 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4815 /// creates a pack expansion. 4816 /// 4817 /// \param Pattern The expression preceding the ellipsis, which will become 4818 /// the pattern of the pack expansion. 4819 /// 4820 /// \param EllipsisLoc The location of the ellipsis. 4821 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4822 4823 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4824 /// creates a pack expansion. 4825 /// 4826 /// \param Pattern The expression preceding the ellipsis, which will become 4827 /// the pattern of the pack expansion. 4828 /// 4829 /// \param EllipsisLoc The location of the ellipsis. 4830 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4831 llvm::Optional<unsigned> NumExpansions); 4832 4833 /// \brief Determine whether we could expand a pack expansion with the 4834 /// given set of parameter packs into separate arguments by repeatedly 4835 /// transforming the pattern. 4836 /// 4837 /// \param EllipsisLoc The location of the ellipsis that identifies the 4838 /// pack expansion. 4839 /// 4840 /// \param PatternRange The source range that covers the entire pattern of 4841 /// the pack expansion. 4842 /// 4843 /// \param Unexpanded The set of unexpanded parameter packs within the 4844 /// pattern. 4845 /// 4846 /// \param NumUnexpanded The number of unexpanded parameter packs in 4847 /// \p Unexpanded. 4848 /// 4849 /// \param ShouldExpand Will be set to \c true if the transformer should 4850 /// expand the corresponding pack expansions into separate arguments. When 4851 /// set, \c NumExpansions must also be set. 4852 /// 4853 /// \param RetainExpansion Whether the caller should add an unexpanded 4854 /// pack expansion after all of the expanded arguments. This is used 4855 /// when extending explicitly-specified template argument packs per 4856 /// C++0x [temp.arg.explicit]p9. 4857 /// 4858 /// \param NumExpansions The number of separate arguments that will be in 4859 /// the expanded form of the corresponding pack expansion. This is both an 4860 /// input and an output parameter, which can be set by the caller if the 4861 /// number of expansions is known a priori (e.g., due to a prior substitution) 4862 /// and will be set by the callee when the number of expansions is known. 4863 /// The callee must set this value when \c ShouldExpand is \c true; it may 4864 /// set this value in other cases. 4865 /// 4866 /// \returns true if an error occurred (e.g., because the parameter packs 4867 /// are to be instantiated with arguments of different lengths), false 4868 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4869 /// must be set. 4870 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4871 SourceRange PatternRange, 4872 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4873 const MultiLevelTemplateArgumentList &TemplateArgs, 4874 bool &ShouldExpand, 4875 bool &RetainExpansion, 4876 llvm::Optional<unsigned> &NumExpansions); 4877 4878 /// \brief Determine the number of arguments in the given pack expansion 4879 /// type. 4880 /// 4881 /// This routine already assumes that the pack expansion type can be 4882 /// expanded and that the number of arguments in the expansion is 4883 /// consistent across all of the unexpanded parameter packs in its pattern. 4884 unsigned getNumArgumentsInExpansion(QualType T, 4885 const MultiLevelTemplateArgumentList &TemplateArgs); 4886 4887 /// \brief Determine whether the given declarator contains any unexpanded 4888 /// parameter packs. 4889 /// 4890 /// This routine is used by the parser to disambiguate function declarators 4891 /// with an ellipsis prior to the ')', e.g., 4892 /// 4893 /// \code 4894 /// void f(T...); 4895 /// \endcode 4896 /// 4897 /// To determine whether we have an (unnamed) function parameter pack or 4898 /// a variadic function. 4899 /// 4900 /// \returns true if the declarator contains any unexpanded parameter packs, 4901 /// false otherwise. 4902 bool containsUnexpandedParameterPacks(Declarator &D); 4903 4904 //===--------------------------------------------------------------------===// 4905 // C++ Template Argument Deduction (C++ [temp.deduct]) 4906 //===--------------------------------------------------------------------===// 4907 4908 /// \brief Describes the result of template argument deduction. 4909 /// 4910 /// The TemplateDeductionResult enumeration describes the result of 4911 /// template argument deduction, as returned from 4912 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4913 /// structure provides additional information about the results of 4914 /// template argument deduction, e.g., the deduced template argument 4915 /// list (if successful) or the specific template parameters or 4916 /// deduced arguments that were involved in the failure. 4917 enum TemplateDeductionResult { 4918 /// \brief Template argument deduction was successful. 4919 TDK_Success = 0, 4920 /// \brief Template argument deduction exceeded the maximum template 4921 /// instantiation depth (which has already been diagnosed). 4922 TDK_InstantiationDepth, 4923 /// \brief Template argument deduction did not deduce a value 4924 /// for every template parameter. 4925 TDK_Incomplete, 4926 /// \brief Template argument deduction produced inconsistent 4927 /// deduced values for the given template parameter. 4928 TDK_Inconsistent, 4929 /// \brief Template argument deduction failed due to inconsistent 4930 /// cv-qualifiers on a template parameter type that would 4931 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4932 /// but were given a non-const "X". 4933 TDK_Underqualified, 4934 /// \brief Substitution of the deduced template argument values 4935 /// resulted in an error. 4936 TDK_SubstitutionFailure, 4937 /// \brief Substitution of the deduced template argument values 4938 /// into a non-deduced context produced a type or value that 4939 /// produces a type that does not match the original template 4940 /// arguments provided. 4941 TDK_NonDeducedMismatch, 4942 /// \brief When performing template argument deduction for a function 4943 /// template, there were too many call arguments. 4944 TDK_TooManyArguments, 4945 /// \brief When performing template argument deduction for a function 4946 /// template, there were too few call arguments. 4947 TDK_TooFewArguments, 4948 /// \brief The explicitly-specified template arguments were not valid 4949 /// template arguments for the given template. 4950 TDK_InvalidExplicitArguments, 4951 /// \brief The arguments included an overloaded function name that could 4952 /// not be resolved to a suitable function. 4953 TDK_FailedOverloadResolution 4954 }; 4955 4956 TemplateDeductionResult 4957 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4958 const TemplateArgumentList &TemplateArgs, 4959 sema::TemplateDeductionInfo &Info); 4960 4961 TemplateDeductionResult 4962 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4963 TemplateArgumentListInfo &ExplicitTemplateArgs, 4964 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4965 SmallVectorImpl<QualType> &ParamTypes, 4966 QualType *FunctionType, 4967 sema::TemplateDeductionInfo &Info); 4968 4969 /// brief A function argument from which we performed template argument 4970 // deduction for a call. 4971 struct OriginalCallArg { 4972 OriginalCallArg(QualType OriginalParamType, 4973 unsigned ArgIdx, 4974 QualType OriginalArgType) 4975 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4976 OriginalArgType(OriginalArgType) { } 4977 4978 QualType OriginalParamType; 4979 unsigned ArgIdx; 4980 QualType OriginalArgType; 4981 }; 4982 4983 TemplateDeductionResult 4984 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4985 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4986 unsigned NumExplicitlySpecified, 4987 FunctionDecl *&Specialization, 4988 sema::TemplateDeductionInfo &Info, 4989 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4990 4991 TemplateDeductionResult 4992 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4993 TemplateArgumentListInfo *ExplicitTemplateArgs, 4994 llvm::ArrayRef<Expr *> Args, 4995 FunctionDecl *&Specialization, 4996 sema::TemplateDeductionInfo &Info); 4997 4998 TemplateDeductionResult 4999 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5000 TemplateArgumentListInfo *ExplicitTemplateArgs, 5001 QualType ArgFunctionType, 5002 FunctionDecl *&Specialization, 5003 sema::TemplateDeductionInfo &Info); 5004 5005 TemplateDeductionResult 5006 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5007 QualType ToType, 5008 CXXConversionDecl *&Specialization, 5009 sema::TemplateDeductionInfo &Info); 5010 5011 TemplateDeductionResult 5012 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5013 TemplateArgumentListInfo *ExplicitTemplateArgs, 5014 FunctionDecl *&Specialization, 5015 sema::TemplateDeductionInfo &Info); 5016 5017 /// \brief Result type of DeduceAutoType. 5018 enum DeduceAutoResult { 5019 DAR_Succeeded, 5020 DAR_Failed, 5021 DAR_FailedAlreadyDiagnosed 5022 }; 5023 5024 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 5025 TypeSourceInfo *&Result); 5026 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 5027 5028 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 5029 FunctionTemplateDecl *FT2, 5030 SourceLocation Loc, 5031 TemplatePartialOrderingContext TPOC, 5032 unsigned NumCallArguments); 5033 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 5034 UnresolvedSetIterator SEnd, 5035 TemplatePartialOrderingContext TPOC, 5036 unsigned NumCallArguments, 5037 SourceLocation Loc, 5038 const PartialDiagnostic &NoneDiag, 5039 const PartialDiagnostic &AmbigDiag, 5040 const PartialDiagnostic &CandidateDiag, 5041 bool Complain = true, 5042 QualType TargetType = QualType()); 5043 5044 ClassTemplatePartialSpecializationDecl * 5045 getMoreSpecializedPartialSpecialization( 5046 ClassTemplatePartialSpecializationDecl *PS1, 5047 ClassTemplatePartialSpecializationDecl *PS2, 5048 SourceLocation Loc); 5049 5050 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 5051 bool OnlyDeduced, 5052 unsigned Depth, 5053 llvm::SmallBitVector &Used); 5054 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 5055 llvm::SmallBitVector &Deduced) { 5056 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 5057 } 5058 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 5059 FunctionTemplateDecl *FunctionTemplate, 5060 llvm::SmallBitVector &Deduced); 5061 5062 //===--------------------------------------------------------------------===// 5063 // C++ Template Instantiation 5064 // 5065 5066 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 5067 const TemplateArgumentList *Innermost = 0, 5068 bool RelativeToPrimary = false, 5069 const FunctionDecl *Pattern = 0); 5070 5071 /// \brief A template instantiation that is currently in progress. 5072 struct ActiveTemplateInstantiation { 5073 /// \brief The kind of template instantiation we are performing 5074 enum InstantiationKind { 5075 /// We are instantiating a template declaration. The entity is 5076 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 5077 TemplateInstantiation, 5078 5079 /// We are instantiating a default argument for a template 5080 /// parameter. The Entity is the template, and 5081 /// TemplateArgs/NumTemplateArguments provides the template 5082 /// arguments as specified. 5083 /// FIXME: Use a TemplateArgumentList 5084 DefaultTemplateArgumentInstantiation, 5085 5086 /// We are instantiating a default argument for a function. 5087 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 5088 /// provides the template arguments as specified. 5089 DefaultFunctionArgumentInstantiation, 5090 5091 /// We are substituting explicit template arguments provided for 5092 /// a function template. The entity is a FunctionTemplateDecl. 5093 ExplicitTemplateArgumentSubstitution, 5094 5095 /// We are substituting template argument determined as part of 5096 /// template argument deduction for either a class template 5097 /// partial specialization or a function template. The 5098 /// Entity is either a ClassTemplatePartialSpecializationDecl or 5099 /// a FunctionTemplateDecl. 5100 DeducedTemplateArgumentSubstitution, 5101 5102 /// We are substituting prior template arguments into a new 5103 /// template parameter. The template parameter itself is either a 5104 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 5105 PriorTemplateArgumentSubstitution, 5106 5107 /// We are checking the validity of a default template argument that 5108 /// has been used when naming a template-id. 5109 DefaultTemplateArgumentChecking 5110 } Kind; 5111 5112 /// \brief The point of instantiation within the source code. 5113 SourceLocation PointOfInstantiation; 5114 5115 /// \brief The template (or partial specialization) in which we are 5116 /// performing the instantiation, for substitutions of prior template 5117 /// arguments. 5118 NamedDecl *Template; 5119 5120 /// \brief The entity that is being instantiated. 5121 uintptr_t Entity; 5122 5123 /// \brief The list of template arguments we are substituting, if they 5124 /// are not part of the entity. 5125 const TemplateArgument *TemplateArgs; 5126 5127 /// \brief The number of template arguments in TemplateArgs. 5128 unsigned NumTemplateArgs; 5129 5130 /// \brief The template deduction info object associated with the 5131 /// substitution or checking of explicit or deduced template arguments. 5132 sema::TemplateDeductionInfo *DeductionInfo; 5133 5134 /// \brief The source range that covers the construct that cause 5135 /// the instantiation, e.g., the template-id that causes a class 5136 /// template instantiation. 5137 SourceRange InstantiationRange; 5138 5139 ActiveTemplateInstantiation() 5140 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 5141 NumTemplateArgs(0), DeductionInfo(0) {} 5142 5143 /// \brief Determines whether this template is an actual instantiation 5144 /// that should be counted toward the maximum instantiation depth. 5145 bool isInstantiationRecord() const; 5146 5147 friend bool operator==(const ActiveTemplateInstantiation &X, 5148 const ActiveTemplateInstantiation &Y) { 5149 if (X.Kind != Y.Kind) 5150 return false; 5151 5152 if (X.Entity != Y.Entity) 5153 return false; 5154 5155 switch (X.Kind) { 5156 case TemplateInstantiation: 5157 return true; 5158 5159 case PriorTemplateArgumentSubstitution: 5160 case DefaultTemplateArgumentChecking: 5161 if (X.Template != Y.Template) 5162 return false; 5163 5164 // Fall through 5165 5166 case DefaultTemplateArgumentInstantiation: 5167 case ExplicitTemplateArgumentSubstitution: 5168 case DeducedTemplateArgumentSubstitution: 5169 case DefaultFunctionArgumentInstantiation: 5170 return X.TemplateArgs == Y.TemplateArgs; 5171 5172 } 5173 5174 llvm_unreachable("Invalid InstantiationKind!"); 5175 } 5176 5177 friend bool operator!=(const ActiveTemplateInstantiation &X, 5178 const ActiveTemplateInstantiation &Y) { 5179 return !(X == Y); 5180 } 5181 }; 5182 5183 /// \brief List of active template instantiations. 5184 /// 5185 /// This vector is treated as a stack. As one template instantiation 5186 /// requires another template instantiation, additional 5187 /// instantiations are pushed onto the stack up to a 5188 /// user-configurable limit LangOptions::InstantiationDepth. 5189 SmallVector<ActiveTemplateInstantiation, 16> 5190 ActiveTemplateInstantiations; 5191 5192 /// \brief Whether we are in a SFINAE context that is not associated with 5193 /// template instantiation. 5194 /// 5195 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5196 /// of a template instantiation or template argument deduction. 5197 bool InNonInstantiationSFINAEContext; 5198 5199 /// \brief The number of ActiveTemplateInstantiation entries in 5200 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5201 /// therefore, should not be counted as part of the instantiation depth. 5202 unsigned NonInstantiationEntries; 5203 5204 /// \brief The last template from which a template instantiation 5205 /// error or warning was produced. 5206 /// 5207 /// This value is used to suppress printing of redundant template 5208 /// instantiation backtraces when there are multiple errors in the 5209 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5210 /// to implement it anywhere else. 5211 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5212 5213 /// \brief The current index into pack expansion arguments that will be 5214 /// used for substitution of parameter packs. 5215 /// 5216 /// The pack expansion index will be -1 to indicate that parameter packs 5217 /// should be instantiated as themselves. Otherwise, the index specifies 5218 /// which argument within the parameter pack will be used for substitution. 5219 int ArgumentPackSubstitutionIndex; 5220 5221 /// \brief RAII object used to change the argument pack substitution index 5222 /// within a \c Sema object. 5223 /// 5224 /// See \c ArgumentPackSubstitutionIndex for more information. 5225 class ArgumentPackSubstitutionIndexRAII { 5226 Sema &Self; 5227 int OldSubstitutionIndex; 5228 5229 public: 5230 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5231 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5232 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5233 } 5234 5235 ~ArgumentPackSubstitutionIndexRAII() { 5236 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5237 } 5238 }; 5239 5240 friend class ArgumentPackSubstitutionRAII; 5241 5242 /// \brief The stack of calls expression undergoing template instantiation. 5243 /// 5244 /// The top of this stack is used by a fixit instantiating unresolved 5245 /// function calls to fix the AST to match the textual change it prints. 5246 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5247 5248 /// \brief For each declaration that involved template argument deduction, the 5249 /// set of diagnostics that were suppressed during that template argument 5250 /// deduction. 5251 /// 5252 /// FIXME: Serialize this structure to the AST file. 5253 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5254 SuppressedDiagnostics; 5255 5256 /// \brief A stack object to be created when performing template 5257 /// instantiation. 5258 /// 5259 /// Construction of an object of type \c InstantiatingTemplate 5260 /// pushes the current instantiation onto the stack of active 5261 /// instantiations. If the size of this stack exceeds the maximum 5262 /// number of recursive template instantiations, construction 5263 /// produces an error and evaluates true. 5264 /// 5265 /// Destruction of this object will pop the named instantiation off 5266 /// the stack. 5267 struct InstantiatingTemplate { 5268 /// \brief Note that we are instantiating a class template, 5269 /// function template, or a member thereof. 5270 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5271 Decl *Entity, 5272 SourceRange InstantiationRange = SourceRange()); 5273 5274 /// \brief Note that we are instantiating a default argument in a 5275 /// template-id. 5276 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5277 TemplateDecl *Template, 5278 const TemplateArgument *TemplateArgs, 5279 unsigned NumTemplateArgs, 5280 SourceRange InstantiationRange = SourceRange()); 5281 5282 /// \brief Note that we are instantiating a default argument in a 5283 /// template-id. 5284 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5285 FunctionTemplateDecl *FunctionTemplate, 5286 const TemplateArgument *TemplateArgs, 5287 unsigned NumTemplateArgs, 5288 ActiveTemplateInstantiation::InstantiationKind Kind, 5289 sema::TemplateDeductionInfo &DeductionInfo, 5290 SourceRange InstantiationRange = SourceRange()); 5291 5292 /// \brief Note that we are instantiating as part of template 5293 /// argument deduction for a class template partial 5294 /// specialization. 5295 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5296 ClassTemplatePartialSpecializationDecl *PartialSpec, 5297 const TemplateArgument *TemplateArgs, 5298 unsigned NumTemplateArgs, 5299 sema::TemplateDeductionInfo &DeductionInfo, 5300 SourceRange InstantiationRange = SourceRange()); 5301 5302 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5303 ParmVarDecl *Param, 5304 const TemplateArgument *TemplateArgs, 5305 unsigned NumTemplateArgs, 5306 SourceRange InstantiationRange = SourceRange()); 5307 5308 /// \brief Note that we are substituting prior template arguments into a 5309 /// non-type or template template parameter. 5310 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5311 NamedDecl *Template, 5312 NonTypeTemplateParmDecl *Param, 5313 const TemplateArgument *TemplateArgs, 5314 unsigned NumTemplateArgs, 5315 SourceRange InstantiationRange); 5316 5317 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5318 NamedDecl *Template, 5319 TemplateTemplateParmDecl *Param, 5320 const TemplateArgument *TemplateArgs, 5321 unsigned NumTemplateArgs, 5322 SourceRange InstantiationRange); 5323 5324 /// \brief Note that we are checking the default template argument 5325 /// against the template parameter for a given template-id. 5326 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5327 TemplateDecl *Template, 5328 NamedDecl *Param, 5329 const TemplateArgument *TemplateArgs, 5330 unsigned NumTemplateArgs, 5331 SourceRange InstantiationRange); 5332 5333 5334 /// \brief Note that we have finished instantiating this template. 5335 void Clear(); 5336 5337 ~InstantiatingTemplate() { Clear(); } 5338 5339 /// \brief Determines whether we have exceeded the maximum 5340 /// recursive template instantiations. 5341 operator bool() const { return Invalid; } 5342 5343 private: 5344 Sema &SemaRef; 5345 bool Invalid; 5346 bool SavedInNonInstantiationSFINAEContext; 5347 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5348 SourceRange InstantiationRange); 5349 5350 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5351 5352 InstantiatingTemplate& 5353 operator=(const InstantiatingTemplate&); // not implemented 5354 }; 5355 5356 void PrintInstantiationStack(); 5357 5358 /// \brief Determines whether we are currently in a context where 5359 /// template argument substitution failures are not considered 5360 /// errors. 5361 /// 5362 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5363 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5364 /// template-deduction context object, which can be used to capture 5365 /// diagnostics that will be suppressed. 5366 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5367 5368 /// \brief RAII class used to determine whether SFINAE has 5369 /// trapped any errors that occur during template argument 5370 /// deduction.` 5371 class SFINAETrap { 5372 Sema &SemaRef; 5373 unsigned PrevSFINAEErrors; 5374 bool PrevInNonInstantiationSFINAEContext; 5375 bool PrevAccessCheckingSFINAE; 5376 5377 public: 5378 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5379 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5380 PrevInNonInstantiationSFINAEContext( 5381 SemaRef.InNonInstantiationSFINAEContext), 5382 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5383 { 5384 if (!SemaRef.isSFINAEContext()) 5385 SemaRef.InNonInstantiationSFINAEContext = true; 5386 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5387 } 5388 5389 ~SFINAETrap() { 5390 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5391 SemaRef.InNonInstantiationSFINAEContext 5392 = PrevInNonInstantiationSFINAEContext; 5393 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5394 } 5395 5396 /// \brief Determine whether any SFINAE errors have been trapped. 5397 bool hasErrorOccurred() const { 5398 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5399 } 5400 }; 5401 5402 /// \brief The current instantiation scope used to store local 5403 /// variables. 5404 LocalInstantiationScope *CurrentInstantiationScope; 5405 5406 /// \brief The number of typos corrected by CorrectTypo. 5407 unsigned TyposCorrected; 5408 5409 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5410 UnqualifiedTyposCorrectedMap; 5411 5412 /// \brief A cache containing the results of typo correction for unqualified 5413 /// name lookup. 5414 /// 5415 /// The string is the string that we corrected to (which may be empty, if 5416 /// there was no correction), while the boolean will be true when the 5417 /// string represents a keyword. 5418 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5419 5420 /// \brief Worker object for performing CFG-based warnings. 5421 sema::AnalysisBasedWarnings AnalysisWarnings; 5422 5423 /// \brief An entity for which implicit template instantiation is required. 5424 /// 5425 /// The source location associated with the declaration is the first place in 5426 /// the source code where the declaration was "used". It is not necessarily 5427 /// the point of instantiation (which will be either before or after the 5428 /// namespace-scope declaration that triggered this implicit instantiation), 5429 /// However, it is the location that diagnostics should generally refer to, 5430 /// because users will need to know what code triggered the instantiation. 5431 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5432 5433 /// \brief The queue of implicit template instantiations that are required 5434 /// but have not yet been performed. 5435 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5436 5437 /// \brief The queue of implicit template instantiations that are required 5438 /// and must be performed within the current local scope. 5439 /// 5440 /// This queue is only used for member functions of local classes in 5441 /// templates, which must be instantiated in the same scope as their 5442 /// enclosing function, so that they can reference function-local 5443 /// types, static variables, enumerators, etc. 5444 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5445 5446 void PerformPendingInstantiations(bool LocalOnly = false); 5447 5448 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5449 const MultiLevelTemplateArgumentList &TemplateArgs, 5450 SourceLocation Loc, DeclarationName Entity); 5451 5452 QualType SubstType(QualType T, 5453 const MultiLevelTemplateArgumentList &TemplateArgs, 5454 SourceLocation Loc, DeclarationName Entity); 5455 5456 TypeSourceInfo *SubstType(TypeLoc TL, 5457 const MultiLevelTemplateArgumentList &TemplateArgs, 5458 SourceLocation Loc, DeclarationName Entity); 5459 5460 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5461 const MultiLevelTemplateArgumentList &TemplateArgs, 5462 SourceLocation Loc, 5463 DeclarationName Entity); 5464 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5465 const MultiLevelTemplateArgumentList &TemplateArgs, 5466 int indexAdjustment, 5467 llvm::Optional<unsigned> NumExpansions, 5468 bool ExpectParameterPack); 5469 bool SubstParmTypes(SourceLocation Loc, 5470 ParmVarDecl **Params, unsigned NumParams, 5471 const MultiLevelTemplateArgumentList &TemplateArgs, 5472 SmallVectorImpl<QualType> &ParamTypes, 5473 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5474 ExprResult SubstExpr(Expr *E, 5475 const MultiLevelTemplateArgumentList &TemplateArgs); 5476 5477 /// \brief Substitute the given template arguments into a list of 5478 /// expressions, expanding pack expansions if required. 5479 /// 5480 /// \param Exprs The list of expressions to substitute into. 5481 /// 5482 /// \param NumExprs The number of expressions in \p Exprs. 5483 /// 5484 /// \param IsCall Whether this is some form of call, in which case 5485 /// default arguments will be dropped. 5486 /// 5487 /// \param TemplateArgs The set of template arguments to substitute. 5488 /// 5489 /// \param Outputs Will receive all of the substituted arguments. 5490 /// 5491 /// \returns true if an error occurred, false otherwise. 5492 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5493 const MultiLevelTemplateArgumentList &TemplateArgs, 5494 SmallVectorImpl<Expr *> &Outputs); 5495 5496 StmtResult SubstStmt(Stmt *S, 5497 const MultiLevelTemplateArgumentList &TemplateArgs); 5498 5499 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5500 const MultiLevelTemplateArgumentList &TemplateArgs); 5501 5502 ExprResult SubstInitializer(Expr *E, 5503 const MultiLevelTemplateArgumentList &TemplateArgs, 5504 bool CXXDirectInit); 5505 5506 bool 5507 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5508 CXXRecordDecl *Pattern, 5509 const MultiLevelTemplateArgumentList &TemplateArgs); 5510 5511 bool 5512 InstantiateClass(SourceLocation PointOfInstantiation, 5513 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5514 const MultiLevelTemplateArgumentList &TemplateArgs, 5515 TemplateSpecializationKind TSK, 5516 bool Complain = true); 5517 5518 bool InstantiateEnum(SourceLocation PointOfInstantiation, 5519 EnumDecl *Instantiation, EnumDecl *Pattern, 5520 const MultiLevelTemplateArgumentList &TemplateArgs, 5521 TemplateSpecializationKind TSK); 5522 5523 struct LateInstantiatedAttribute { 5524 const Attr *TmplAttr; 5525 LocalInstantiationScope *Scope; 5526 Decl *NewDecl; 5527 5528 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5529 Decl *D) 5530 : TmplAttr(A), Scope(S), NewDecl(D) 5531 { } 5532 }; 5533 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5534 5535 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5536 const Decl *Pattern, Decl *Inst, 5537 LateInstantiatedAttrVec *LateAttrs = 0, 5538 LocalInstantiationScope *OuterMostScope = 0); 5539 5540 bool 5541 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5542 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5543 TemplateSpecializationKind TSK, 5544 bool Complain = true); 5545 5546 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5547 CXXRecordDecl *Instantiation, 5548 const MultiLevelTemplateArgumentList &TemplateArgs, 5549 TemplateSpecializationKind TSK); 5550 5551 void InstantiateClassTemplateSpecializationMembers( 5552 SourceLocation PointOfInstantiation, 5553 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5554 TemplateSpecializationKind TSK); 5555 5556 NestedNameSpecifierLoc 5557 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5558 const MultiLevelTemplateArgumentList &TemplateArgs); 5559 5560 DeclarationNameInfo 5561 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5562 const MultiLevelTemplateArgumentList &TemplateArgs); 5563 TemplateName 5564 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5565 SourceLocation Loc, 5566 const MultiLevelTemplateArgumentList &TemplateArgs); 5567 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5568 TemplateArgumentListInfo &Result, 5569 const MultiLevelTemplateArgumentList &TemplateArgs); 5570 5571 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5572 FunctionDecl *Function, 5573 bool Recursive = false, 5574 bool DefinitionRequired = false); 5575 void InstantiateStaticDataMemberDefinition( 5576 SourceLocation PointOfInstantiation, 5577 VarDecl *Var, 5578 bool Recursive = false, 5579 bool DefinitionRequired = false); 5580 5581 void InstantiateMemInitializers(CXXConstructorDecl *New, 5582 const CXXConstructorDecl *Tmpl, 5583 const MultiLevelTemplateArgumentList &TemplateArgs); 5584 5585 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5586 const MultiLevelTemplateArgumentList &TemplateArgs); 5587 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5588 const MultiLevelTemplateArgumentList &TemplateArgs); 5589 5590 // Objective-C declarations. 5591 enum ObjCContainerKind { 5592 OCK_None = -1, 5593 OCK_Interface = 0, 5594 OCK_Protocol, 5595 OCK_Category, 5596 OCK_ClassExtension, 5597 OCK_Implementation, 5598 OCK_CategoryImplementation 5599 }; 5600 ObjCContainerKind getObjCContainerKind() const; 5601 5602 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5603 IdentifierInfo *ClassName, 5604 SourceLocation ClassLoc, 5605 IdentifierInfo *SuperName, 5606 SourceLocation SuperLoc, 5607 Decl * const *ProtoRefs, 5608 unsigned NumProtoRefs, 5609 const SourceLocation *ProtoLocs, 5610 SourceLocation EndProtoLoc, 5611 AttributeList *AttrList); 5612 5613 Decl *ActOnCompatiblityAlias( 5614 SourceLocation AtCompatibilityAliasLoc, 5615 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5616 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5617 5618 bool CheckForwardProtocolDeclarationForCircularDependency( 5619 IdentifierInfo *PName, 5620 SourceLocation &PLoc, SourceLocation PrevLoc, 5621 const ObjCList<ObjCProtocolDecl> &PList); 5622 5623 Decl *ActOnStartProtocolInterface( 5624 SourceLocation AtProtoInterfaceLoc, 5625 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5626 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5627 const SourceLocation *ProtoLocs, 5628 SourceLocation EndProtoLoc, 5629 AttributeList *AttrList); 5630 5631 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5632 IdentifierInfo *ClassName, 5633 SourceLocation ClassLoc, 5634 IdentifierInfo *CategoryName, 5635 SourceLocation CategoryLoc, 5636 Decl * const *ProtoRefs, 5637 unsigned NumProtoRefs, 5638 const SourceLocation *ProtoLocs, 5639 SourceLocation EndProtoLoc); 5640 5641 Decl *ActOnStartClassImplementation( 5642 SourceLocation AtClassImplLoc, 5643 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5644 IdentifierInfo *SuperClassname, 5645 SourceLocation SuperClassLoc); 5646 5647 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5648 IdentifierInfo *ClassName, 5649 SourceLocation ClassLoc, 5650 IdentifierInfo *CatName, 5651 SourceLocation CatLoc); 5652 5653 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5654 ArrayRef<Decl *> Decls); 5655 5656 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5657 IdentifierInfo **IdentList, 5658 SourceLocation *IdentLocs, 5659 unsigned NumElts); 5660 5661 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5662 const IdentifierLocPair *IdentList, 5663 unsigned NumElts, 5664 AttributeList *attrList); 5665 5666 void FindProtocolDeclaration(bool WarnOnDeclarations, 5667 const IdentifierLocPair *ProtocolId, 5668 unsigned NumProtocols, 5669 SmallVectorImpl<Decl *> &Protocols); 5670 5671 /// Ensure attributes are consistent with type. 5672 /// \param [in, out] Attributes The attributes to check; they will 5673 /// be modified to be consistent with \arg PropertyTy. 5674 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5675 SourceLocation Loc, 5676 unsigned &Attributes); 5677 5678 /// Process the specified property declaration and create decls for the 5679 /// setters and getters as needed. 5680 /// \param property The property declaration being processed 5681 /// \param DC The semantic container for the property 5682 /// \param redeclaredProperty Declaration for property if redeclared 5683 /// in class extension. 5684 /// \param lexicalDC Container for redeclaredProperty. 5685 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5686 ObjCContainerDecl *DC, 5687 ObjCPropertyDecl *redeclaredProperty = 0, 5688 ObjCContainerDecl *lexicalDC = 0); 5689 5690 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5691 ObjCPropertyDecl *SuperProperty, 5692 const IdentifierInfo *Name); 5693 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5694 5695 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5696 ObjCMethodDecl *MethodDecl, 5697 bool IsInstance); 5698 5699 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5700 5701 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5702 ObjCInterfaceDecl *ID); 5703 5704 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5705 ObjCProtocolDecl *PDecl); 5706 5707 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5708 Decl **allMethods = 0, unsigned allNum = 0, 5709 Decl **allProperties = 0, unsigned pNum = 0, 5710 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5711 5712 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5713 SourceLocation LParenLoc, 5714 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5715 Selector GetterSel, Selector SetterSel, 5716 bool *OverridingProperty, 5717 tok::ObjCKeywordKind MethodImplKind, 5718 DeclContext *lexicalDC = 0); 5719 5720 Decl *ActOnPropertyImplDecl(Scope *S, 5721 SourceLocation AtLoc, 5722 SourceLocation PropertyLoc, 5723 bool ImplKind, 5724 IdentifierInfo *PropertyId, 5725 IdentifierInfo *PropertyIvar, 5726 SourceLocation PropertyIvarLoc); 5727 5728 enum ObjCSpecialMethodKind { 5729 OSMK_None, 5730 OSMK_Alloc, 5731 OSMK_New, 5732 OSMK_Copy, 5733 OSMK_RetainingInit, 5734 OSMK_NonRetainingInit 5735 }; 5736 5737 struct ObjCArgInfo { 5738 IdentifierInfo *Name; 5739 SourceLocation NameLoc; 5740 // The Type is null if no type was specified, and the DeclSpec is invalid 5741 // in this case. 5742 ParsedType Type; 5743 ObjCDeclSpec DeclSpec; 5744 5745 /// ArgAttrs - Attribute list for this argument. 5746 AttributeList *ArgAttrs; 5747 }; 5748 5749 Decl *ActOnMethodDeclaration( 5750 Scope *S, 5751 SourceLocation BeginLoc, // location of the + or -. 5752 SourceLocation EndLoc, // location of the ; or {. 5753 tok::TokenKind MethodType, 5754 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5755 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5756 // optional arguments. The number of types/arguments is obtained 5757 // from the Sel.getNumArgs(). 5758 ObjCArgInfo *ArgInfo, 5759 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5760 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5761 bool isVariadic, bool MethodDefinition); 5762 5763 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5764 // Will search "local" class/category implementations for a method decl. 5765 // Will also search in class's root looking for instance method. 5766 // Returns 0 if no method is found. 5767 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5768 ObjCInterfaceDecl *CDecl); 5769 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5770 ObjCInterfaceDecl *ClassDecl); 5771 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5772 const ObjCObjectPointerType *OPT, 5773 bool IsInstance); 5774 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5775 bool IsInstance); 5776 5777 bool inferObjCARCLifetime(ValueDecl *decl); 5778 5779 ExprResult 5780 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5781 Expr *BaseExpr, 5782 SourceLocation OpLoc, 5783 DeclarationName MemberName, 5784 SourceLocation MemberLoc, 5785 SourceLocation SuperLoc, QualType SuperType, 5786 bool Super); 5787 5788 ExprResult 5789 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5790 IdentifierInfo &propertyName, 5791 SourceLocation receiverNameLoc, 5792 SourceLocation propertyNameLoc); 5793 5794 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5795 5796 /// \brief Describes the kind of message expression indicated by a message 5797 /// send that starts with an identifier. 5798 enum ObjCMessageKind { 5799 /// \brief The message is sent to 'super'. 5800 ObjCSuperMessage, 5801 /// \brief The message is an instance message. 5802 ObjCInstanceMessage, 5803 /// \brief The message is a class message, and the identifier is a type 5804 /// name. 5805 ObjCClassMessage 5806 }; 5807 5808 ObjCMessageKind getObjCMessageKind(Scope *S, 5809 IdentifierInfo *Name, 5810 SourceLocation NameLoc, 5811 bool IsSuper, 5812 bool HasTrailingDot, 5813 ParsedType &ReceiverType); 5814 5815 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5816 Selector Sel, 5817 SourceLocation LBracLoc, 5818 ArrayRef<SourceLocation> SelectorLocs, 5819 SourceLocation RBracLoc, 5820 MultiExprArg Args); 5821 5822 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5823 QualType ReceiverType, 5824 SourceLocation SuperLoc, 5825 Selector Sel, 5826 ObjCMethodDecl *Method, 5827 SourceLocation LBracLoc, 5828 ArrayRef<SourceLocation> SelectorLocs, 5829 SourceLocation RBracLoc, 5830 MultiExprArg Args, 5831 bool isImplicit = false); 5832 5833 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5834 bool isSuperReceiver, 5835 SourceLocation Loc, 5836 Selector Sel, 5837 ObjCMethodDecl *Method, 5838 MultiExprArg Args); 5839 5840 ExprResult ActOnClassMessage(Scope *S, 5841 ParsedType Receiver, 5842 Selector Sel, 5843 SourceLocation LBracLoc, 5844 ArrayRef<SourceLocation> SelectorLocs, 5845 SourceLocation RBracLoc, 5846 MultiExprArg Args); 5847 5848 ExprResult BuildInstanceMessage(Expr *Receiver, 5849 QualType ReceiverType, 5850 SourceLocation SuperLoc, 5851 Selector Sel, 5852 ObjCMethodDecl *Method, 5853 SourceLocation LBracLoc, 5854 ArrayRef<SourceLocation> SelectorLocs, 5855 SourceLocation RBracLoc, 5856 MultiExprArg Args, 5857 bool isImplicit = false); 5858 5859 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5860 QualType ReceiverType, 5861 SourceLocation Loc, 5862 Selector Sel, 5863 ObjCMethodDecl *Method, 5864 MultiExprArg Args); 5865 5866 ExprResult ActOnInstanceMessage(Scope *S, 5867 Expr *Receiver, 5868 Selector Sel, 5869 SourceLocation LBracLoc, 5870 ArrayRef<SourceLocation> SelectorLocs, 5871 SourceLocation RBracLoc, 5872 MultiExprArg Args); 5873 5874 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5875 ObjCBridgeCastKind Kind, 5876 SourceLocation BridgeKeywordLoc, 5877 TypeSourceInfo *TSInfo, 5878 Expr *SubExpr); 5879 5880 ExprResult ActOnObjCBridgedCast(Scope *S, 5881 SourceLocation LParenLoc, 5882 ObjCBridgeCastKind Kind, 5883 SourceLocation BridgeKeywordLoc, 5884 ParsedType Type, 5885 SourceLocation RParenLoc, 5886 Expr *SubExpr); 5887 5888 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5889 5890 /// \brief Check whether the given new method is a valid override of the 5891 /// given overridden method, and set any properties that should be inherited. 5892 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5893 const ObjCMethodDecl *Overridden, 5894 bool IsImplementation); 5895 5896 /// \brief Check whether the given method overrides any methods in its class, 5897 /// calling \c CheckObjCMethodOverride for each overridden method. 5898 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5899 5900 enum PragmaOptionsAlignKind { 5901 POAK_Native, // #pragma options align=native 5902 POAK_Natural, // #pragma options align=natural 5903 POAK_Packed, // #pragma options align=packed 5904 POAK_Power, // #pragma options align=power 5905 POAK_Mac68k, // #pragma options align=mac68k 5906 POAK_Reset // #pragma options align=reset 5907 }; 5908 5909 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5910 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5911 SourceLocation PragmaLoc, 5912 SourceLocation KindLoc); 5913 5914 enum PragmaPackKind { 5915 PPK_Default, // #pragma pack([n]) 5916 PPK_Show, // #pragma pack(show), only supported by MSVC. 5917 PPK_Push, // #pragma pack(push, [identifier], [n]) 5918 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5919 }; 5920 5921 enum PragmaMSStructKind { 5922 PMSST_OFF, // #pragms ms_struct off 5923 PMSST_ON // #pragms ms_struct on 5924 }; 5925 5926 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5927 void ActOnPragmaPack(PragmaPackKind Kind, 5928 IdentifierInfo *Name, 5929 Expr *Alignment, 5930 SourceLocation PragmaLoc, 5931 SourceLocation LParenLoc, 5932 SourceLocation RParenLoc); 5933 5934 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5935 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5936 5937 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5938 void ActOnPragmaUnused(const Token &Identifier, 5939 Scope *curScope, 5940 SourceLocation PragmaLoc); 5941 5942 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5943 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5944 SourceLocation PragmaLoc); 5945 5946 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5947 SourceLocation Loc); 5948 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5949 5950 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5951 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5952 SourceLocation PragmaLoc, 5953 SourceLocation WeakNameLoc); 5954 5955 /// ActOnPragmaRedefineExtname - Called on well formed 5956 /// #pragma redefine_extname oldname newname. 5957 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 5958 IdentifierInfo* AliasName, 5959 SourceLocation PragmaLoc, 5960 SourceLocation WeakNameLoc, 5961 SourceLocation AliasNameLoc); 5962 5963 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5964 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5965 IdentifierInfo* AliasName, 5966 SourceLocation PragmaLoc, 5967 SourceLocation WeakNameLoc, 5968 SourceLocation AliasNameLoc); 5969 5970 /// ActOnPragmaFPContract - Called on well formed 5971 /// #pragma {STDC,OPENCL} FP_CONTRACT 5972 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5973 5974 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5975 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5976 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5977 5978 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5979 void AddMsStructLayoutForRecord(RecordDecl *RD); 5980 5981 /// FreePackedContext - Deallocate and null out PackContext. 5982 void FreePackedContext(); 5983 5984 /// PushNamespaceVisibilityAttr - Note that we've entered a 5985 /// namespace with a visibility attribute. 5986 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5987 SourceLocation Loc); 5988 5989 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5990 /// add an appropriate visibility attribute. 5991 void AddPushedVisibilityAttribute(Decl *RD); 5992 5993 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5994 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5995 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5996 5997 /// FreeVisContext - Deallocate and null out VisContext. 5998 void FreeVisContext(); 5999 6000 /// AddCFAuditedAttribute - Check whether we're currently within 6001 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 6002 /// the appropriate attribute. 6003 void AddCFAuditedAttribute(Decl *D); 6004 6005 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 6006 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 6007 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 6008 6009 /// \brief The kind of conversion being performed. 6010 enum CheckedConversionKind { 6011 /// \brief An implicit conversion. 6012 CCK_ImplicitConversion, 6013 /// \brief A C-style cast. 6014 CCK_CStyleCast, 6015 /// \brief A functional-style cast. 6016 CCK_FunctionalCast, 6017 /// \brief A cast other than a C-style cast. 6018 CCK_OtherCast 6019 }; 6020 6021 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 6022 /// cast. If there is already an implicit cast, merge into the existing one. 6023 /// If isLvalue, the result of the cast is an lvalue. 6024 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 6025 ExprValueKind VK = VK_RValue, 6026 const CXXCastPath *BasePath = 0, 6027 CheckedConversionKind CCK 6028 = CCK_ImplicitConversion); 6029 6030 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 6031 /// to the conversion from scalar type ScalarTy to the Boolean type. 6032 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 6033 6034 /// IgnoredValueConversions - Given that an expression's result is 6035 /// syntactically ignored, perform any conversions that are 6036 /// required. 6037 ExprResult IgnoredValueConversions(Expr *E); 6038 6039 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 6040 // functions and arrays to their respective pointers (C99 6.3.2.1). 6041 ExprResult UsualUnaryConversions(Expr *E); 6042 6043 // DefaultFunctionArrayConversion - converts functions and arrays 6044 // to their respective pointers (C99 6.3.2.1). 6045 ExprResult DefaultFunctionArrayConversion(Expr *E); 6046 6047 // DefaultFunctionArrayLvalueConversion - converts functions and 6048 // arrays to their respective pointers and performs the 6049 // lvalue-to-rvalue conversion. 6050 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 6051 6052 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 6053 // the operand. This is DefaultFunctionArrayLvalueConversion, 6054 // except that it assumes the operand isn't of function or array 6055 // type. 6056 ExprResult DefaultLvalueConversion(Expr *E); 6057 6058 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 6059 // do not have a prototype. Integer promotions are performed on each 6060 // argument, and arguments that have type float are promoted to double. 6061 ExprResult DefaultArgumentPromotion(Expr *E); 6062 6063 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 6064 enum VariadicCallType { 6065 VariadicFunction, 6066 VariadicBlock, 6067 VariadicMethod, 6068 VariadicConstructor, 6069 VariadicDoesNotApply 6070 }; 6071 6072 /// GatherArgumentsForCall - Collector argument expressions for various 6073 /// form of call prototypes. 6074 bool GatherArgumentsForCall(SourceLocation CallLoc, 6075 FunctionDecl *FDecl, 6076 const FunctionProtoType *Proto, 6077 unsigned FirstProtoArg, 6078 Expr **Args, unsigned NumArgs, 6079 SmallVector<Expr *, 8> &AllArgs, 6080 VariadicCallType CallType = VariadicDoesNotApply, 6081 bool AllowExplicit = false); 6082 6083 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 6084 // will warn if the resulting type is not a POD type. 6085 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 6086 FunctionDecl *FDecl); 6087 6088 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 6089 // operands and then handles various conversions that are common to binary 6090 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 6091 // routine returns the first non-arithmetic type found. The client is 6092 // responsible for emitting appropriate error diagnostics. 6093 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 6094 bool IsCompAssign = false); 6095 6096 /// AssignConvertType - All of the 'assignment' semantic checks return this 6097 /// enum to indicate whether the assignment was allowed. These checks are 6098 /// done for simple assignments, as well as initialization, return from 6099 /// function, argument passing, etc. The query is phrased in terms of a 6100 /// source and destination type. 6101 enum AssignConvertType { 6102 /// Compatible - the types are compatible according to the standard. 6103 Compatible, 6104 6105 /// PointerToInt - The assignment converts a pointer to an int, which we 6106 /// accept as an extension. 6107 PointerToInt, 6108 6109 /// IntToPointer - The assignment converts an int to a pointer, which we 6110 /// accept as an extension. 6111 IntToPointer, 6112 6113 /// FunctionVoidPointer - The assignment is between a function pointer and 6114 /// void*, which the standard doesn't allow, but we accept as an extension. 6115 FunctionVoidPointer, 6116 6117 /// IncompatiblePointer - The assignment is between two pointers types that 6118 /// are not compatible, but we accept them as an extension. 6119 IncompatiblePointer, 6120 6121 /// IncompatiblePointer - The assignment is between two pointers types which 6122 /// point to integers which have a different sign, but are otherwise 6123 /// identical. This is a subset of the above, but broken out because it's by 6124 /// far the most common case of incompatible pointers. 6125 IncompatiblePointerSign, 6126 6127 /// CompatiblePointerDiscardsQualifiers - The assignment discards 6128 /// c/v/r qualifiers, which we accept as an extension. 6129 CompatiblePointerDiscardsQualifiers, 6130 6131 /// IncompatiblePointerDiscardsQualifiers - The assignment 6132 /// discards qualifiers that we don't permit to be discarded, 6133 /// like address spaces. 6134 IncompatiblePointerDiscardsQualifiers, 6135 6136 /// IncompatibleNestedPointerQualifiers - The assignment is between two 6137 /// nested pointer types, and the qualifiers other than the first two 6138 /// levels differ e.g. char ** -> const char **, but we accept them as an 6139 /// extension. 6140 IncompatibleNestedPointerQualifiers, 6141 6142 /// IncompatibleVectors - The assignment is between two vector types that 6143 /// have the same size, which we accept as an extension. 6144 IncompatibleVectors, 6145 6146 /// IntToBlockPointer - The assignment converts an int to a block 6147 /// pointer. We disallow this. 6148 IntToBlockPointer, 6149 6150 /// IncompatibleBlockPointer - The assignment is between two block 6151 /// pointers types that are not compatible. 6152 IncompatibleBlockPointer, 6153 6154 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6155 /// id type and something else (that is incompatible with it). For example, 6156 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6157 IncompatibleObjCQualifiedId, 6158 6159 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6160 /// object with __weak qualifier. 6161 IncompatibleObjCWeakRef, 6162 6163 /// Incompatible - We reject this conversion outright, it is invalid to 6164 /// represent it in the AST. 6165 Incompatible 6166 }; 6167 6168 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6169 /// assignment conversion type specified by ConvTy. This returns true if the 6170 /// conversion was invalid or false if the conversion was accepted. 6171 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6172 SourceLocation Loc, 6173 QualType DstType, QualType SrcType, 6174 Expr *SrcExpr, AssignmentAction Action, 6175 bool *Complained = 0); 6176 6177 /// CheckAssignmentConstraints - Perform type checking for assignment, 6178 /// argument passing, variable initialization, and function return values. 6179 /// C99 6.5.16. 6180 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6181 QualType LHSType, 6182 QualType RHSType); 6183 6184 /// Check assignment constraints and prepare for a conversion of the 6185 /// RHS to the LHS type. 6186 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6187 ExprResult &RHS, 6188 CastKind &Kind); 6189 6190 // CheckSingleAssignmentConstraints - Currently used by 6191 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6192 // this routine performs the default function/array converions. 6193 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6194 ExprResult &RHS, 6195 bool Diagnose = true); 6196 6197 // \brief If the lhs type is a transparent union, check whether we 6198 // can initialize the transparent union with the given expression. 6199 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6200 ExprResult &RHS); 6201 6202 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6203 6204 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6205 6206 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6207 AssignmentAction Action, 6208 bool AllowExplicit = false); 6209 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6210 AssignmentAction Action, 6211 bool AllowExplicit, 6212 ImplicitConversionSequence& ICS); 6213 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6214 const ImplicitConversionSequence& ICS, 6215 AssignmentAction Action, 6216 CheckedConversionKind CCK 6217 = CCK_ImplicitConversion); 6218 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6219 const StandardConversionSequence& SCS, 6220 AssignmentAction Action, 6221 CheckedConversionKind CCK); 6222 6223 /// the following "Check" methods will return a valid/converted QualType 6224 /// or a null QualType (indicating an error diagnostic was issued). 6225 6226 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6227 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6228 ExprResult &RHS); 6229 QualType CheckPointerToMemberOperands( // C++ 5.5 6230 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6231 SourceLocation OpLoc, bool isIndirect); 6232 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6233 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6234 bool IsDivide); 6235 QualType CheckRemainderOperands( // C99 6.5.5 6236 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6237 bool IsCompAssign = false); 6238 QualType CheckAdditionOperands( // C99 6.5.6 6239 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6240 QualType* CompLHSTy = 0); 6241 QualType CheckSubtractionOperands( // C99 6.5.6 6242 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6243 QualType* CompLHSTy = 0); 6244 QualType CheckShiftOperands( // C99 6.5.7 6245 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6246 bool IsCompAssign = false); 6247 QualType CheckCompareOperands( // C99 6.5.8/9 6248 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6249 bool isRelational); 6250 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6251 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6252 bool IsCompAssign = false); 6253 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6254 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6255 // CheckAssignmentOperands is used for both simple and compound assignment. 6256 // For simple assignment, pass both expressions and a null converted type. 6257 // For compound assignment, pass both expressions and the converted type. 6258 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6259 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6260 6261 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6262 UnaryOperatorKind Opcode, Expr *Op); 6263 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6264 BinaryOperatorKind Opcode, 6265 Expr *LHS, Expr *RHS); 6266 ExprResult checkPseudoObjectRValue(Expr *E); 6267 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6268 6269 QualType CheckConditionalOperands( // C99 6.5.15 6270 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6271 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6272 QualType CXXCheckConditionalOperands( // C++ 5.16 6273 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6274 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6275 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6276 bool *NonStandardCompositeType = 0); 6277 QualType FindCompositePointerType(SourceLocation Loc, 6278 ExprResult &E1, ExprResult &E2, 6279 bool *NonStandardCompositeType = 0) { 6280 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6281 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6282 NonStandardCompositeType); 6283 E1 = Owned(E1Tmp); 6284 E2 = Owned(E2Tmp); 6285 return Composite; 6286 } 6287 6288 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6289 SourceLocation QuestionLoc); 6290 6291 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6292 SourceLocation QuestionLoc); 6293 6294 /// type checking for vector binary operators. 6295 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6296 SourceLocation Loc, bool IsCompAssign); 6297 QualType GetSignedVectorType(QualType V); 6298 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6299 SourceLocation Loc, bool isRelational); 6300 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6301 SourceLocation Loc); 6302 6303 /// type checking declaration initializers (C99 6.7.8) 6304 bool CheckForConstantInitializer(Expr *e, QualType t); 6305 6306 // type checking C++ declaration initializers (C++ [dcl.init]). 6307 6308 /// ReferenceCompareResult - Expresses the result of comparing two 6309 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6310 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6311 enum ReferenceCompareResult { 6312 /// Ref_Incompatible - The two types are incompatible, so direct 6313 /// reference binding is not possible. 6314 Ref_Incompatible = 0, 6315 /// Ref_Related - The two types are reference-related, which means 6316 /// that their unqualified forms (T1 and T2) are either the same 6317 /// or T1 is a base class of T2. 6318 Ref_Related, 6319 /// Ref_Compatible_With_Added_Qualification - The two types are 6320 /// reference-compatible with added qualification, meaning that 6321 /// they are reference-compatible and the qualifiers on T1 (cv1) 6322 /// are greater than the qualifiers on T2 (cv2). 6323 Ref_Compatible_With_Added_Qualification, 6324 /// Ref_Compatible - The two types are reference-compatible and 6325 /// have equivalent qualifiers (cv1 == cv2). 6326 Ref_Compatible 6327 }; 6328 6329 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6330 QualType T1, QualType T2, 6331 bool &DerivedToBase, 6332 bool &ObjCConversion, 6333 bool &ObjCLifetimeConversion); 6334 6335 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6336 Expr *CastExpr, CastKind &CastKind, 6337 ExprValueKind &VK, CXXCastPath &Path); 6338 6339 /// \brief Force an expression with unknown-type to an expression of the 6340 /// given type. 6341 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6342 6343 // CheckVectorCast - check type constraints for vectors. 6344 // Since vectors are an extension, there are no C standard reference for this. 6345 // We allow casting between vectors and integer datatypes of the same size. 6346 // returns true if the cast is invalid 6347 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6348 CastKind &Kind); 6349 6350 // CheckExtVectorCast - check type constraints for extended vectors. 6351 // Since vectors are an extension, there are no C standard reference for this. 6352 // We allow casting between vectors and integer datatypes of the same size, 6353 // or vectors and the element type of that vector. 6354 // returns the cast expr 6355 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6356 CastKind &Kind); 6357 6358 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6359 SourceLocation LParenLoc, 6360 Expr *CastExpr, 6361 SourceLocation RParenLoc); 6362 6363 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6364 6365 /// \brief Checks for invalid conversions and casts between 6366 /// retainable pointers and other pointer kinds. 6367 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6368 QualType castType, Expr *&op, 6369 CheckedConversionKind CCK); 6370 6371 Expr *stripARCUnbridgedCast(Expr *e); 6372 void diagnoseARCUnbridgedCast(Expr *e); 6373 6374 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6375 QualType ExprType); 6376 6377 /// checkRetainCycles - Check whether an Objective-C message send 6378 /// might create an obvious retain cycle. 6379 void checkRetainCycles(ObjCMessageExpr *msg); 6380 void checkRetainCycles(Expr *receiver, Expr *argument); 6381 6382 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6383 /// to weak/__unsafe_unretained type. 6384 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6385 6386 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6387 /// to weak/__unsafe_unretained expression. 6388 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6389 6390 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6391 /// \param Method - May be null. 6392 /// \param [out] ReturnType - The return type of the send. 6393 /// \return true iff there were any incompatible types. 6394 bool CheckMessageArgumentTypes(QualType ReceiverType, 6395 Expr **Args, unsigned NumArgs, Selector Sel, 6396 ObjCMethodDecl *Method, bool isClassMessage, 6397 bool isSuperMessage, 6398 SourceLocation lbrac, SourceLocation rbrac, 6399 QualType &ReturnType, ExprValueKind &VK); 6400 6401 /// \brief Determine the result of a message send expression based on 6402 /// the type of the receiver, the method expected to receive the message, 6403 /// and the form of the message send. 6404 QualType getMessageSendResultType(QualType ReceiverType, 6405 ObjCMethodDecl *Method, 6406 bool isClassMessage, bool isSuperMessage); 6407 6408 /// \brief If the given expression involves a message send to a method 6409 /// with a related result type, emit a note describing what happened. 6410 void EmitRelatedResultTypeNote(const Expr *E); 6411 6412 /// CheckBooleanCondition - Diagnose problems involving the use of 6413 /// the given expression as a boolean condition (e.g. in an if 6414 /// statement). Also performs the standard function and array 6415 /// decays, possibly changing the input variable. 6416 /// 6417 /// \param Loc - A location associated with the condition, e.g. the 6418 /// 'if' keyword. 6419 /// \return true iff there were any errors 6420 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6421 6422 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6423 Expr *SubExpr); 6424 6425 /// DiagnoseAssignmentAsCondition - Given that an expression is 6426 /// being used as a boolean condition, warn if it's an assignment. 6427 void DiagnoseAssignmentAsCondition(Expr *E); 6428 6429 /// \brief Redundant parentheses over an equality comparison can indicate 6430 /// that the user intended an assignment used as condition. 6431 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6432 6433 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6434 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6435 6436 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6437 /// the specified width and sign. If an overflow occurs, detect it and emit 6438 /// the specified diagnostic. 6439 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6440 unsigned NewWidth, bool NewSign, 6441 SourceLocation Loc, unsigned DiagID); 6442 6443 /// Checks that the Objective-C declaration is declared in the global scope. 6444 /// Emits an error and marks the declaration as invalid if it's not declared 6445 /// in the global scope. 6446 bool CheckObjCDeclScope(Decl *D); 6447 6448 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6449 /// and reports the appropriate diagnostics. Returns false on success. 6450 /// Can optionally return the value of the expression. 6451 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6452 PartialDiagnostic Diag, 6453 bool AllowFold, 6454 PartialDiagnostic FoldDiag); 6455 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6456 PartialDiagnostic Diag, 6457 bool AllowFold = true) { 6458 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6459 PDiag(0)); 6460 } 6461 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6462 6463 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6464 /// the correct width, and that the field type is valid. 6465 /// Returns false on success. 6466 /// Can optionally return whether the bit-field is of width 0 6467 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6468 QualType FieldTy, Expr *BitWidth, 6469 bool *ZeroWidth = 0); 6470 6471 enum CUDAFunctionTarget { 6472 CFT_Device, 6473 CFT_Global, 6474 CFT_Host, 6475 CFT_HostDevice 6476 }; 6477 6478 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6479 6480 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6481 CUDAFunctionTarget CalleeTarget); 6482 6483 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6484 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6485 IdentifyCUDATarget(Callee)); 6486 } 6487 6488 /// \name Code completion 6489 //@{ 6490 /// \brief Describes the context in which code completion occurs. 6491 enum ParserCompletionContext { 6492 /// \brief Code completion occurs at top-level or namespace context. 6493 PCC_Namespace, 6494 /// \brief Code completion occurs within a class, struct, or union. 6495 PCC_Class, 6496 /// \brief Code completion occurs within an Objective-C interface, protocol, 6497 /// or category. 6498 PCC_ObjCInterface, 6499 /// \brief Code completion occurs within an Objective-C implementation or 6500 /// category implementation 6501 PCC_ObjCImplementation, 6502 /// \brief Code completion occurs within the list of instance variables 6503 /// in an Objective-C interface, protocol, category, or implementation. 6504 PCC_ObjCInstanceVariableList, 6505 /// \brief Code completion occurs following one or more template 6506 /// headers. 6507 PCC_Template, 6508 /// \brief Code completion occurs following one or more template 6509 /// headers within a class. 6510 PCC_MemberTemplate, 6511 /// \brief Code completion occurs within an expression. 6512 PCC_Expression, 6513 /// \brief Code completion occurs within a statement, which may 6514 /// also be an expression or a declaration. 6515 PCC_Statement, 6516 /// \brief Code completion occurs at the beginning of the 6517 /// initialization statement (or expression) in a for loop. 6518 PCC_ForInit, 6519 /// \brief Code completion occurs within the condition of an if, 6520 /// while, switch, or for statement. 6521 PCC_Condition, 6522 /// \brief Code completion occurs within the body of a function on a 6523 /// recovery path, where we do not have a specific handle on our position 6524 /// in the grammar. 6525 PCC_RecoveryInFunction, 6526 /// \brief Code completion occurs where only a type is permitted. 6527 PCC_Type, 6528 /// \brief Code completion occurs in a parenthesized expression, which 6529 /// might also be a type cast. 6530 PCC_ParenthesizedExpression, 6531 /// \brief Code completion occurs within a sequence of declaration 6532 /// specifiers within a function, method, or block. 6533 PCC_LocalDeclarationSpecifiers 6534 }; 6535 6536 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6537 void CodeCompleteOrdinaryName(Scope *S, 6538 ParserCompletionContext CompletionContext); 6539 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6540 bool AllowNonIdentifiers, 6541 bool AllowNestedNameSpecifiers); 6542 6543 struct CodeCompleteExpressionData; 6544 void CodeCompleteExpression(Scope *S, 6545 const CodeCompleteExpressionData &Data); 6546 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6547 SourceLocation OpLoc, 6548 bool IsArrow); 6549 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6550 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6551 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6552 void CodeCompleteCase(Scope *S); 6553 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6554 void CodeCompleteInitializer(Scope *S, Decl *D); 6555 void CodeCompleteReturn(Scope *S); 6556 void CodeCompleteAfterIf(Scope *S); 6557 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6558 6559 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6560 bool EnteringContext); 6561 void CodeCompleteUsing(Scope *S); 6562 void CodeCompleteUsingDirective(Scope *S); 6563 void CodeCompleteNamespaceDecl(Scope *S); 6564 void CodeCompleteNamespaceAliasDecl(Scope *S); 6565 void CodeCompleteOperatorName(Scope *S); 6566 void CodeCompleteConstructorInitializer(Decl *Constructor, 6567 CXXCtorInitializer** Initializers, 6568 unsigned NumInitializers); 6569 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6570 bool AfterAmpersand); 6571 6572 void CodeCompleteObjCAtDirective(Scope *S); 6573 void CodeCompleteObjCAtVisibility(Scope *S); 6574 void CodeCompleteObjCAtStatement(Scope *S); 6575 void CodeCompleteObjCAtExpression(Scope *S); 6576 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6577 void CodeCompleteObjCPropertyGetter(Scope *S); 6578 void CodeCompleteObjCPropertySetter(Scope *S); 6579 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6580 bool IsParameter); 6581 void CodeCompleteObjCMessageReceiver(Scope *S); 6582 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6583 IdentifierInfo **SelIdents, 6584 unsigned NumSelIdents, 6585 bool AtArgumentExpression); 6586 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6587 IdentifierInfo **SelIdents, 6588 unsigned NumSelIdents, 6589 bool AtArgumentExpression, 6590 bool IsSuper = false); 6591 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6592 IdentifierInfo **SelIdents, 6593 unsigned NumSelIdents, 6594 bool AtArgumentExpression, 6595 ObjCInterfaceDecl *Super = 0); 6596 void CodeCompleteObjCForCollection(Scope *S, 6597 DeclGroupPtrTy IterationVar); 6598 void CodeCompleteObjCSelector(Scope *S, 6599 IdentifierInfo **SelIdents, 6600 unsigned NumSelIdents); 6601 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6602 unsigned NumProtocols); 6603 void CodeCompleteObjCProtocolDecl(Scope *S); 6604 void CodeCompleteObjCInterfaceDecl(Scope *S); 6605 void CodeCompleteObjCSuperclass(Scope *S, 6606 IdentifierInfo *ClassName, 6607 SourceLocation ClassNameLoc); 6608 void CodeCompleteObjCImplementationDecl(Scope *S); 6609 void CodeCompleteObjCInterfaceCategory(Scope *S, 6610 IdentifierInfo *ClassName, 6611 SourceLocation ClassNameLoc); 6612 void CodeCompleteObjCImplementationCategory(Scope *S, 6613 IdentifierInfo *ClassName, 6614 SourceLocation ClassNameLoc); 6615 void CodeCompleteObjCPropertyDefinition(Scope *S); 6616 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6617 IdentifierInfo *PropertyName); 6618 void CodeCompleteObjCMethodDecl(Scope *S, 6619 bool IsInstanceMethod, 6620 ParsedType ReturnType); 6621 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6622 bool IsInstanceMethod, 6623 bool AtParameterName, 6624 ParsedType ReturnType, 6625 IdentifierInfo **SelIdents, 6626 unsigned NumSelIdents); 6627 void CodeCompletePreprocessorDirective(bool InConditional); 6628 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6629 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6630 void CodeCompletePreprocessorExpression(); 6631 void CodeCompletePreprocessorMacroArgument(Scope *S, 6632 IdentifierInfo *Macro, 6633 MacroInfo *MacroInfo, 6634 unsigned Argument); 6635 void CodeCompleteNaturalLanguage(); 6636 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6637 SmallVectorImpl<CodeCompletionResult> &Results); 6638 //@} 6639 6640 //===--------------------------------------------------------------------===// 6641 // Extra semantic analysis beyond the C type system 6642 6643public: 6644 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6645 unsigned ByteNo) const; 6646 6647private: 6648 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6649 const ArraySubscriptExpr *ASE=0, 6650 bool AllowOnePastEnd=true, bool IndexNegated=false); 6651 void CheckArrayAccess(const Expr *E); 6652 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6653 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6654 Expr **Args, unsigned NumArgs); 6655 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6656 6657 bool CheckObjCString(Expr *Arg); 6658 6659 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6660 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6661 6662 bool SemaBuiltinVAStart(CallExpr *TheCall); 6663 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6664 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6665 6666public: 6667 // Used by C++ template instantiation. 6668 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6669 6670private: 6671 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6672 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6673 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6674 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6675 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6676 AtomicExpr::AtomicOp Op); 6677 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6678 llvm::APSInt &Result); 6679 6680 enum FormatStringType { 6681 FST_Scanf, 6682 FST_Printf, 6683 FST_NSString, 6684 FST_Strftime, 6685 FST_Strfmon, 6686 FST_Kprintf, 6687 FST_Unknown 6688 }; 6689 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6690 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6691 bool HasVAListArg, unsigned format_idx, 6692 unsigned firstDataArg, FormatStringType Type, 6693 bool inFunctionCall = true); 6694 6695 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6696 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6697 unsigned format_idx, unsigned firstDataArg, 6698 FormatStringType Type, bool inFunctionCall); 6699 6700 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6701 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6702 unsigned NumArgs, bool IsCXXMember, 6703 SourceLocation Loc, SourceRange Range); 6704 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6705 bool HasVAListArg, unsigned format_idx, 6706 unsigned firstDataArg, FormatStringType Type, 6707 SourceLocation Loc, SourceRange range); 6708 6709 void CheckNonNullArguments(const NonNullAttr *NonNull, 6710 const Expr * const *ExprArgs, 6711 SourceLocation CallSiteLoc); 6712 6713 void CheckMemaccessArguments(const CallExpr *Call, 6714 unsigned BId, 6715 IdentifierInfo *FnName); 6716 6717 void CheckStrlcpycatArguments(const CallExpr *Call, 6718 IdentifierInfo *FnName); 6719 6720 void CheckStrncatArguments(const CallExpr *Call, 6721 IdentifierInfo *FnName); 6722 6723 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6724 SourceLocation ReturnLoc); 6725 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6726 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6727 6728 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6729 Expr *Init); 6730 6731 /// \brief The parser's current scope. 6732 /// 6733 /// The parser maintains this state here. 6734 Scope *CurScope; 6735 6736protected: 6737 friend class Parser; 6738 friend class InitializationSequence; 6739 friend class ASTReader; 6740 friend class ASTWriter; 6741 6742public: 6743 /// \brief Retrieve the parser's current scope. 6744 /// 6745 /// This routine must only be used when it is certain that semantic analysis 6746 /// and the parser are in precisely the same context, which is not the case 6747 /// when, e.g., we are performing any kind of template instantiation. 6748 /// Therefore, the only safe places to use this scope are in the parser 6749 /// itself and in routines directly invoked from the parser and *never* from 6750 /// template substitution or instantiation. 6751 Scope *getCurScope() const { return CurScope; } 6752 6753 Decl *getObjCDeclContext() const; 6754 6755 DeclContext *getCurLexicalContext() const { 6756 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6757 } 6758 6759 AvailabilityResult getCurContextAvailability() const; 6760}; 6761 6762/// \brief RAII object that enters a new expression evaluation context. 6763class EnterExpressionEvaluationContext { 6764 Sema &Actions; 6765 6766public: 6767 EnterExpressionEvaluationContext(Sema &Actions, 6768 Sema::ExpressionEvaluationContext NewContext, 6769 Decl *LambdaContextDecl = 0, 6770 bool IsDecltype = false) 6771 : Actions(Actions) { 6772 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6773 IsDecltype); 6774 } 6775 6776 ~EnterExpressionEvaluationContext() { 6777 Actions.PopExpressionEvaluationContext(); 6778 } 6779}; 6780 6781} // end namespace clang 6782 6783#endif 6784