Sema.h revision 6c4c36c4ed1007143f5b8655eb68b313a7e12e76
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 public: 664 enum Kind { 665 NoMemberOrDeleted, 666 Ambiguous, 667 SuccessNonConst, 668 SuccessConst 669 }; 670 671 private: 672 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 673 674 public: 675 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 676 : FastFoldingSetNode(ID) 677 {} 678 679 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 680 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 681 682 Kind getKind() const { return static_cast<Kind>(Pair.getInt()); } 683 void setKind(Kind K) { Pair.setInt(K); } 684 685 bool hasSuccess() const { return getKind() >= SuccessNonConst; } 686 bool hasConstParamMatch() const { return getKind() == SuccessConst; } 687 }; 688 689 /// \brief A cache of special member function overload resolution results 690 /// for C++ records. 691 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 692 693 /// \brief The kind of translation unit we are processing. 694 /// 695 /// When we're processing a complete translation unit, Sema will perform 696 /// end-of-translation-unit semantic tasks (such as creating 697 /// initializers for tentative definitions in C) once parsing has 698 /// completed. Modules and precompiled headers perform different kinds of 699 /// checks. 700 TranslationUnitKind TUKind; 701 702 llvm::BumpPtrAllocator BumpAlloc; 703 704 /// \brief The number of SFINAE diagnostics that have been trapped. 705 unsigned NumSFINAEErrors; 706 707 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 708 UnparsedDefaultArgInstantiationsMap; 709 710 /// \brief A mapping from parameters with unparsed default arguments to the 711 /// set of instantiations of each parameter. 712 /// 713 /// This mapping is a temporary data structure used when parsing 714 /// nested class templates or nested classes of class templates, 715 /// where we might end up instantiating an inner class before the 716 /// default arguments of its methods have been parsed. 717 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 718 719 // Contains the locations of the beginning of unparsed default 720 // argument locations. 721 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 722 723 /// UndefinedInternals - all the used, undefined objects with 724 /// internal linkage in this translation unit. 725 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 726 727 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 728 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 729 730 /// Method Pool - allows efficient lookup when typechecking messages to "id". 731 /// We need to maintain a list, since selectors can have differing signatures 732 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 733 /// of selectors are "overloaded"). 734 GlobalMethodPool MethodPool; 735 736 /// Method selectors used in a @selector expression. Used for implementation 737 /// of -Wselector. 738 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 739 740 void ReadMethodPool(Selector Sel); 741 742 /// Private Helper predicate to check for 'self'. 743 bool isSelfExpr(Expr *RExpr); 744 745 /// \brief Cause the active diagnostic on the DiagosticsEngine to be 746 /// emitted. This is closely coupled to the SemaDiagnosticBuilder class and 747 /// should not be used elsewhere. 748 void EmitCurrentDiagnostic(unsigned DiagID); 749 750public: 751 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 752 TranslationUnitKind TUKind = TU_Complete, 753 CodeCompleteConsumer *CompletionConsumer = 0); 754 ~Sema(); 755 756 /// \brief Perform initialization that occurs after the parser has been 757 /// initialized but before it parses anything. 758 void Initialize(); 759 760 const LangOptions &getLangOpts() const { return LangOpts; } 761 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 762 FPOptions &getFPOptions() { return FPFeatures; } 763 764 DiagnosticsEngine &getDiagnostics() const { return Diags; } 765 SourceManager &getSourceManager() const { return SourceMgr; } 766 const TargetAttributesSema &getTargetAttributesSema() const; 767 Preprocessor &getPreprocessor() const { return PP; } 768 ASTContext &getASTContext() const { return Context; } 769 ASTConsumer &getASTConsumer() const { return Consumer; } 770 ASTMutationListener *getASTMutationListener() const; 771 772 void PrintStats() const; 773 774 /// \brief Helper class that creates diagnostics with optional 775 /// template instantiation stacks. 776 /// 777 /// This class provides a wrapper around the basic DiagnosticBuilder 778 /// class that emits diagnostics. SemaDiagnosticBuilder is 779 /// responsible for emitting the diagnostic (as DiagnosticBuilder 780 /// does) and, if the diagnostic comes from inside a template 781 /// instantiation, printing the template instantiation stack as 782 /// well. 783 class SemaDiagnosticBuilder : public DiagnosticBuilder { 784 Sema &SemaRef; 785 unsigned DiagID; 786 787 public: 788 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 789 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 790 791 ~SemaDiagnosticBuilder() { 792 // If we aren't active, there is nothing to do. 793 if (!isActive()) return; 794 795 // Otherwise, we need to emit the diagnostic. First flush the underlying 796 // DiagnosticBuilder data, and clear the diagnostic builder itself so it 797 // won't emit the diagnostic in its own destructor. 798 // 799 // This seems wasteful, in that as written the DiagnosticBuilder dtor will 800 // do its own needless checks to see if the diagnostic needs to be 801 // emitted. However, because we take care to ensure that the builder 802 // objects never escape, a sufficiently smart compiler will be able to 803 // eliminate that code. 804 FlushCounts(); 805 Clear(); 806 807 // Dispatch to Sema to emit the diagnostic. 808 SemaRef.EmitCurrentDiagnostic(DiagID); 809 } 810 }; 811 812 /// \brief Emit a diagnostic. 813 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) { 814 DiagnosticBuilder DB = Diags.Report(Loc, DiagID); 815 return SemaDiagnosticBuilder(DB, *this, DiagID); 816 } 817 818 /// \brief Emit a partial diagnostic. 819 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 820 821 /// \brief Build a partial diagnostic. 822 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 823 824 bool findMacroSpelling(SourceLocation &loc, StringRef name); 825 826 /// \brief Get a string to suggest for zero-initialization of a type. 827 const char *getFixItZeroInitializerForType(QualType T) const; 828 829 ExprResult Owned(Expr* E) { return E; } 830 ExprResult Owned(ExprResult R) { return R; } 831 StmtResult Owned(Stmt* S) { return S; } 832 833 void ActOnEndOfTranslationUnit(); 834 835 void CheckDelegatingCtorCycles(); 836 837 Scope *getScopeForContext(DeclContext *Ctx); 838 839 void PushFunctionScope(); 840 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 841 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 842 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 843 const Decl *D = 0, const BlockExpr *blkExpr = 0); 844 845 sema::FunctionScopeInfo *getCurFunction() const { 846 return FunctionScopes.back(); 847 } 848 849 void PushCompoundScope(); 850 void PopCompoundScope(); 851 852 sema::CompoundScopeInfo &getCurCompoundScope() const; 853 854 bool hasAnyUnrecoverableErrorsInThisFunction() const; 855 856 /// \brief Retrieve the current block, if any. 857 sema::BlockScopeInfo *getCurBlock(); 858 859 /// \brief Retrieve the current lambda expression, if any. 860 sema::LambdaScopeInfo *getCurLambda(); 861 862 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 863 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 864 865 //===--------------------------------------------------------------------===// 866 // Type Analysis / Processing: SemaType.cpp. 867 // 868 869 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 870 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 871 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 872 } 873 QualType BuildPointerType(QualType T, 874 SourceLocation Loc, DeclarationName Entity); 875 QualType BuildReferenceType(QualType T, bool LValueRef, 876 SourceLocation Loc, DeclarationName Entity); 877 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 878 Expr *ArraySize, unsigned Quals, 879 SourceRange Brackets, DeclarationName Entity); 880 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 881 SourceLocation AttrLoc); 882 QualType BuildFunctionType(QualType T, 883 QualType *ParamTypes, unsigned NumParamTypes, 884 bool Variadic, bool HasTrailingReturn, 885 unsigned Quals, RefQualifierKind RefQualifier, 886 SourceLocation Loc, DeclarationName Entity, 887 FunctionType::ExtInfo Info); 888 QualType BuildMemberPointerType(QualType T, QualType Class, 889 SourceLocation Loc, 890 DeclarationName Entity); 891 QualType BuildBlockPointerType(QualType T, 892 SourceLocation Loc, DeclarationName Entity); 893 QualType BuildParenType(QualType T); 894 QualType BuildAtomicType(QualType T, SourceLocation Loc); 895 896 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 897 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 898 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 899 TypeSourceInfo *ReturnTypeInfo); 900 /// \brief Package the given type and TSI into a ParsedType. 901 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 902 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 903 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 904 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 905 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 906 bool CheckDistantExceptionSpec(QualType T); 907 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 908 bool CheckEquivalentExceptionSpec( 909 const FunctionProtoType *Old, SourceLocation OldLoc, 910 const FunctionProtoType *New, SourceLocation NewLoc); 911 bool CheckEquivalentExceptionSpec( 912 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 913 const FunctionProtoType *Old, SourceLocation OldLoc, 914 const FunctionProtoType *New, SourceLocation NewLoc, 915 bool *MissingExceptionSpecification = 0, 916 bool *MissingEmptyExceptionSpecification = 0, 917 bool AllowNoexceptAllMatchWithNoSpec = false, 918 bool IsOperatorNew = false); 919 bool CheckExceptionSpecSubset( 920 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 921 const FunctionProtoType *Superset, SourceLocation SuperLoc, 922 const FunctionProtoType *Subset, SourceLocation SubLoc); 923 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 924 const FunctionProtoType *Target, SourceLocation TargetLoc, 925 const FunctionProtoType *Source, SourceLocation SourceLoc); 926 927 TypeResult ActOnTypeName(Scope *S, Declarator &D); 928 929 /// \brief The parser has parsed the context-sensitive type 'instancetype' 930 /// in an Objective-C message declaration. Return the appropriate type. 931 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 932 933 bool RequireCompleteType(SourceLocation Loc, QualType T, 934 const PartialDiagnostic &PD, 935 std::pair<SourceLocation, PartialDiagnostic> Note); 936 bool RequireCompleteType(SourceLocation Loc, QualType T, 937 const PartialDiagnostic &PD); 938 bool RequireCompleteType(SourceLocation Loc, QualType T, 939 unsigned DiagID); 940 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 941 std::pair<SourceLocation, 942 PartialDiagnostic> Note); 943 944 bool RequireLiteralType(SourceLocation Loc, QualType T, 945 const PartialDiagnostic &PD); 946 947 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 948 const CXXScopeSpec &SS, QualType T); 949 950 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 951 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 952 QualType BuildUnaryTransformType(QualType BaseType, 953 UnaryTransformType::UTTKind UKind, 954 SourceLocation Loc); 955 956 //===--------------------------------------------------------------------===// 957 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 958 // 959 960 /// List of decls defined in a function prototype. This contains EnumConstants 961 /// that incorrectly end up in translation unit scope because there is no 962 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 963 /// them into the FunctionDecl. 964 std::vector<NamedDecl*> DeclsInPrototypeScope; 965 /// Nonzero if we are currently parsing a function declarator. This is a counter 966 /// as opposed to a boolean so we can deal with nested function declarators 967 /// such as: 968 /// void f(void (*g)(), ...) 969 unsigned InFunctionDeclarator; 970 971 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 972 973 void DiagnoseUseOfUnimplementedSelectors(); 974 975 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 976 Scope *S, CXXScopeSpec *SS = 0, 977 bool isClassName = false, 978 bool HasTrailingDot = false, 979 ParsedType ObjectType = ParsedType(), 980 bool IsCtorOrDtorName = false, 981 bool WantNontrivialTypeSourceInfo = false, 982 IdentifierInfo **CorrectedII = 0); 983 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 984 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 985 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 986 SourceLocation IILoc, 987 Scope *S, 988 CXXScopeSpec *SS, 989 ParsedType &SuggestedType); 990 991 /// \brief Describes the result of the name lookup and resolution performed 992 /// by \c ClassifyName(). 993 enum NameClassificationKind { 994 NC_Unknown, 995 NC_Error, 996 NC_Keyword, 997 NC_Type, 998 NC_Expression, 999 NC_NestedNameSpecifier, 1000 NC_TypeTemplate, 1001 NC_FunctionTemplate 1002 }; 1003 1004 class NameClassification { 1005 NameClassificationKind Kind; 1006 ExprResult Expr; 1007 TemplateName Template; 1008 ParsedType Type; 1009 const IdentifierInfo *Keyword; 1010 1011 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 1012 1013 public: 1014 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 1015 1016 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 1017 1018 NameClassification(const IdentifierInfo *Keyword) 1019 : Kind(NC_Keyword), Keyword(Keyword) { } 1020 1021 static NameClassification Error() { 1022 return NameClassification(NC_Error); 1023 } 1024 1025 static NameClassification Unknown() { 1026 return NameClassification(NC_Unknown); 1027 } 1028 1029 static NameClassification NestedNameSpecifier() { 1030 return NameClassification(NC_NestedNameSpecifier); 1031 } 1032 1033 static NameClassification TypeTemplate(TemplateName Name) { 1034 NameClassification Result(NC_TypeTemplate); 1035 Result.Template = Name; 1036 return Result; 1037 } 1038 1039 static NameClassification FunctionTemplate(TemplateName Name) { 1040 NameClassification Result(NC_FunctionTemplate); 1041 Result.Template = Name; 1042 return Result; 1043 } 1044 1045 NameClassificationKind getKind() const { return Kind; } 1046 1047 ParsedType getType() const { 1048 assert(Kind == NC_Type); 1049 return Type; 1050 } 1051 1052 ExprResult getExpression() const { 1053 assert(Kind == NC_Expression); 1054 return Expr; 1055 } 1056 1057 TemplateName getTemplateName() const { 1058 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1059 return Template; 1060 } 1061 1062 TemplateNameKind getTemplateNameKind() const { 1063 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1064 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1065 } 1066}; 1067 1068 /// \brief Perform name lookup on the given name, classifying it based on 1069 /// the results of name lookup and the following token. 1070 /// 1071 /// This routine is used by the parser to resolve identifiers and help direct 1072 /// parsing. When the identifier cannot be found, this routine will attempt 1073 /// to correct the typo and classify based on the resulting name. 1074 /// 1075 /// \param S The scope in which we're performing name lookup. 1076 /// 1077 /// \param SS The nested-name-specifier that precedes the name. 1078 /// 1079 /// \param Name The identifier. If typo correction finds an alternative name, 1080 /// this pointer parameter will be updated accordingly. 1081 /// 1082 /// \param NameLoc The location of the identifier. 1083 /// 1084 /// \param NextToken The token following the identifier. Used to help 1085 /// disambiguate the name. 1086 NameClassification ClassifyName(Scope *S, 1087 CXXScopeSpec &SS, 1088 IdentifierInfo *&Name, 1089 SourceLocation NameLoc, 1090 const Token &NextToken); 1091 1092 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1093 1094 Decl *HandleDeclarator(Scope *S, Declarator &D, 1095 MultiTemplateParamsArg TemplateParameterLists); 1096 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1097 const LookupResult &Previous, 1098 Scope *S); 1099 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1100 bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC, 1101 DeclarationName Name, 1102 SourceLocation Loc); 1103 void DiagnoseFunctionSpecifiers(Declarator& D); 1104 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1105 void CheckShadow(Scope *S, VarDecl *D); 1106 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1107 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1108 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1109 TypeSourceInfo *TInfo, 1110 LookupResult &Previous); 1111 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1112 LookupResult &Previous, bool &Redeclaration); 1113 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1114 TypeSourceInfo *TInfo, 1115 LookupResult &Previous, 1116 MultiTemplateParamsArg TemplateParamLists); 1117 // Returns true if the variable declaration is a redeclaration 1118 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1119 void CheckCompleteVariableDeclaration(VarDecl *var); 1120 void ActOnStartFunctionDeclarator(); 1121 void ActOnEndFunctionDeclarator(); 1122 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1123 TypeSourceInfo *TInfo, 1124 LookupResult &Previous, 1125 MultiTemplateParamsArg TemplateParamLists, 1126 bool &AddToScope); 1127 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1128 1129 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1130 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1131 1132 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1133 // Returns true if the function declaration is a redeclaration 1134 bool CheckFunctionDeclaration(Scope *S, 1135 FunctionDecl *NewFD, LookupResult &Previous, 1136 bool IsExplicitSpecialization); 1137 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1138 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1139 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1140 SourceLocation Loc, 1141 QualType T); 1142 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1143 SourceLocation NameLoc, IdentifierInfo *Name, 1144 QualType T, TypeSourceInfo *TSInfo, 1145 StorageClass SC, StorageClass SCAsWritten); 1146 void ActOnParamDefaultArgument(Decl *param, 1147 SourceLocation EqualLoc, 1148 Expr *defarg); 1149 void ActOnParamUnparsedDefaultArgument(Decl *param, 1150 SourceLocation EqualLoc, 1151 SourceLocation ArgLoc); 1152 void ActOnParamDefaultArgumentError(Decl *param); 1153 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1154 SourceLocation EqualLoc); 1155 1156 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1157 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1158 bool TypeMayContainAuto); 1159 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1160 void ActOnInitializerError(Decl *Dcl); 1161 void ActOnCXXForRangeDecl(Decl *D); 1162 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1163 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1164 void FinalizeDeclaration(Decl *D); 1165 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1166 Decl **Group, 1167 unsigned NumDecls); 1168 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1169 bool TypeMayContainAuto = true); 1170 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1171 SourceLocation LocAfterDecls); 1172 void CheckForFunctionRedefinition(FunctionDecl *FD); 1173 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1174 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1175 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1176 1177 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1178 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1179 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1180 1181 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1182 /// attribute for which parsing is delayed. 1183 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1184 1185 /// \brief Diagnose any unused parameters in the given sequence of 1186 /// ParmVarDecl pointers. 1187 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1188 ParmVarDecl * const *End); 1189 1190 /// \brief Diagnose whether the size of parameters or return value of a 1191 /// function or obj-c method definition is pass-by-value and larger than a 1192 /// specified threshold. 1193 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1194 ParmVarDecl * const *End, 1195 QualType ReturnTy, 1196 NamedDecl *D); 1197 1198 void DiagnoseInvalidJumps(Stmt *Body); 1199 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1200 SourceLocation AsmLoc, 1201 SourceLocation RParenLoc); 1202 1203 /// \brief The parser has processed a module import declaration. 1204 /// 1205 /// \param AtLoc The location of the '@' symbol, if any. 1206 /// 1207 /// \param ImportLoc The location of the 'import' keyword. 1208 /// 1209 /// \param Path The module access path. 1210 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1211 ModuleIdPath Path); 1212 1213 /// \brief Retrieve a suitable printing policy. 1214 PrintingPolicy getPrintingPolicy() const { 1215 return getPrintingPolicy(Context, PP); 1216 } 1217 1218 /// \brief Retrieve a suitable printing policy. 1219 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1220 const Preprocessor &PP); 1221 1222 /// Scope actions. 1223 void ActOnPopScope(SourceLocation Loc, Scope *S); 1224 void ActOnTranslationUnitScope(Scope *S); 1225 1226 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1227 DeclSpec &DS); 1228 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1229 DeclSpec &DS, 1230 MultiTemplateParamsArg TemplateParams); 1231 1232 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1233 AccessSpecifier AS, 1234 RecordDecl *Record); 1235 1236 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1237 RecordDecl *Record); 1238 1239 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1240 TagTypeKind NewTag, bool isDefinition, 1241 SourceLocation NewTagLoc, 1242 const IdentifierInfo &Name); 1243 1244 enum TagUseKind { 1245 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1246 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1247 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1248 TUK_Friend // Friend declaration: 'friend struct foo;' 1249 }; 1250 1251 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1252 SourceLocation KWLoc, CXXScopeSpec &SS, 1253 IdentifierInfo *Name, SourceLocation NameLoc, 1254 AttributeList *Attr, AccessSpecifier AS, 1255 SourceLocation ModulePrivateLoc, 1256 MultiTemplateParamsArg TemplateParameterLists, 1257 bool &OwnedDecl, bool &IsDependent, 1258 SourceLocation ScopedEnumKWLoc, 1259 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1260 1261 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1262 unsigned TagSpec, SourceLocation TagLoc, 1263 CXXScopeSpec &SS, 1264 IdentifierInfo *Name, SourceLocation NameLoc, 1265 AttributeList *Attr, 1266 MultiTemplateParamsArg TempParamLists); 1267 1268 TypeResult ActOnDependentTag(Scope *S, 1269 unsigned TagSpec, 1270 TagUseKind TUK, 1271 const CXXScopeSpec &SS, 1272 IdentifierInfo *Name, 1273 SourceLocation TagLoc, 1274 SourceLocation NameLoc); 1275 1276 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1277 IdentifierInfo *ClassName, 1278 SmallVectorImpl<Decl *> &Decls); 1279 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1280 Declarator &D, Expr *BitfieldWidth); 1281 1282 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1283 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1284 AccessSpecifier AS); 1285 1286 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1287 TypeSourceInfo *TInfo, 1288 RecordDecl *Record, SourceLocation Loc, 1289 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1290 SourceLocation TSSL, 1291 AccessSpecifier AS, NamedDecl *PrevDecl, 1292 Declarator *D = 0); 1293 1294 enum CXXSpecialMember { 1295 CXXDefaultConstructor, 1296 CXXCopyConstructor, 1297 CXXMoveConstructor, 1298 CXXCopyAssignment, 1299 CXXMoveAssignment, 1300 CXXDestructor, 1301 CXXInvalid 1302 }; 1303 bool CheckNontrivialField(FieldDecl *FD); 1304 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1305 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1306 void ActOnLastBitfield(SourceLocation DeclStart, 1307 SmallVectorImpl<Decl *> &AllIvarDecls); 1308 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1309 Declarator &D, Expr *BitfieldWidth, 1310 tok::ObjCKeywordKind visibility); 1311 1312 // This is used for both record definitions and ObjC interface declarations. 1313 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1314 llvm::ArrayRef<Decl *> Fields, 1315 SourceLocation LBrac, SourceLocation RBrac, 1316 AttributeList *AttrList); 1317 1318 /// ActOnTagStartDefinition - Invoked when we have entered the 1319 /// scope of a tag's definition (e.g., for an enumeration, class, 1320 /// struct, or union). 1321 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1322 1323 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1324 1325 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1326 /// C++ record definition's base-specifiers clause and are starting its 1327 /// member declarations. 1328 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1329 SourceLocation FinalLoc, 1330 SourceLocation LBraceLoc); 1331 1332 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1333 /// the definition of a tag (enumeration, class, struct, or union). 1334 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1335 SourceLocation RBraceLoc); 1336 1337 void ActOnObjCContainerFinishDefinition(); 1338 1339 /// \brief Invoked when we must temporarily exit the objective-c container 1340 /// scope for parsing/looking-up C constructs. 1341 /// 1342 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1343 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1344 void ActOnObjCReenterContainerContext(DeclContext *DC); 1345 1346 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1347 /// error parsing the definition of a tag. 1348 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1349 1350 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1351 EnumConstantDecl *LastEnumConst, 1352 SourceLocation IdLoc, 1353 IdentifierInfo *Id, 1354 Expr *val); 1355 bool CheckEnumUnderlyingType(TypeSourceInfo *TI); 1356 bool CheckEnumRedeclaration(SourceLocation EnumLoc, bool IsScoped, 1357 QualType EnumUnderlyingTy, const EnumDecl *Prev); 1358 1359 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1360 SourceLocation IdLoc, IdentifierInfo *Id, 1361 AttributeList *Attrs, 1362 SourceLocation EqualLoc, Expr *Val); 1363 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1364 SourceLocation RBraceLoc, Decl *EnumDecl, 1365 Decl **Elements, unsigned NumElements, 1366 Scope *S, AttributeList *Attr); 1367 1368 DeclContext *getContainingDC(DeclContext *DC); 1369 1370 /// Set the current declaration context until it gets popped. 1371 void PushDeclContext(Scope *S, DeclContext *DC); 1372 void PopDeclContext(); 1373 1374 /// EnterDeclaratorContext - Used when we must lookup names in the context 1375 /// of a declarator's nested name specifier. 1376 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1377 void ExitDeclaratorContext(Scope *S); 1378 1379 /// Push the parameters of D, which must be a function, into scope. 1380 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1381 void ActOnExitFunctionContext() { PopDeclContext(); } 1382 1383 DeclContext *getFunctionLevelDeclContext(); 1384 1385 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1386 /// to the function decl for the function being parsed. If we're currently 1387 /// in a 'block', this returns the containing context. 1388 FunctionDecl *getCurFunctionDecl(); 1389 1390 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1391 /// the method decl for the method being parsed. If we're currently 1392 /// in a 'block', this returns the containing context. 1393 ObjCMethodDecl *getCurMethodDecl(); 1394 1395 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1396 /// or C function we're in, otherwise return null. If we're currently 1397 /// in a 'block', this returns the containing context. 1398 NamedDecl *getCurFunctionOrMethodDecl(); 1399 1400 /// Add this decl to the scope shadowed decl chains. 1401 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1402 1403 /// \brief Make the given externally-produced declaration visible at the 1404 /// top level scope. 1405 /// 1406 /// \param D The externally-produced declaration to push. 1407 /// 1408 /// \param Name The name of the externally-produced declaration. 1409 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1410 1411 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1412 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1413 /// true if 'D' belongs to the given declaration context. 1414 /// 1415 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1416 /// whether the declaration is in scope for the purposes of explicit template 1417 /// instantiation or specialization. The default is false. 1418 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1419 bool ExplicitInstantiationOrSpecialization = false); 1420 1421 /// Finds the scope corresponding to the given decl context, if it 1422 /// happens to be an enclosing scope. Otherwise return NULL. 1423 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1424 1425 /// Subroutines of ActOnDeclarator(). 1426 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1427 TypeSourceInfo *TInfo); 1428 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1429 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1430 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1431 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S); 1432 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old, 1433 Scope *S); 1434 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1435 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1436 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1437 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1438 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S); 1439 1440 // AssignmentAction - This is used by all the assignment diagnostic functions 1441 // to represent what is actually causing the operation 1442 enum AssignmentAction { 1443 AA_Assigning, 1444 AA_Passing, 1445 AA_Returning, 1446 AA_Converting, 1447 AA_Initializing, 1448 AA_Sending, 1449 AA_Casting 1450 }; 1451 1452 /// C++ Overloading. 1453 enum OverloadKind { 1454 /// This is a legitimate overload: the existing declarations are 1455 /// functions or function templates with different signatures. 1456 Ovl_Overload, 1457 1458 /// This is not an overload because the signature exactly matches 1459 /// an existing declaration. 1460 Ovl_Match, 1461 1462 /// This is not an overload because the lookup results contain a 1463 /// non-function. 1464 Ovl_NonFunction 1465 }; 1466 OverloadKind CheckOverload(Scope *S, 1467 FunctionDecl *New, 1468 const LookupResult &OldDecls, 1469 NamedDecl *&OldDecl, 1470 bool IsForUsingDecl); 1471 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1472 1473 /// \brief Checks availability of the function depending on the current 1474 /// function context.Inside an unavailable function,unavailability is ignored. 1475 /// 1476 /// \returns true if \arg FD is unavailable and current context is inside 1477 /// an available function, false otherwise. 1478 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1479 1480 ImplicitConversionSequence 1481 TryImplicitConversion(Expr *From, QualType ToType, 1482 bool SuppressUserConversions, 1483 bool AllowExplicit, 1484 bool InOverloadResolution, 1485 bool CStyle, 1486 bool AllowObjCWritebackConversion); 1487 1488 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1489 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1490 bool IsComplexPromotion(QualType FromType, QualType ToType); 1491 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1492 bool InOverloadResolution, 1493 QualType& ConvertedType, bool &IncompatibleObjC); 1494 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1495 QualType& ConvertedType, bool &IncompatibleObjC); 1496 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1497 QualType &ConvertedType); 1498 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1499 QualType& ConvertedType); 1500 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1501 const FunctionProtoType *NewType, 1502 unsigned *ArgPos = 0); 1503 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1504 QualType FromType, QualType ToType); 1505 1506 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1507 bool CheckPointerConversion(Expr *From, QualType ToType, 1508 CastKind &Kind, 1509 CXXCastPath& BasePath, 1510 bool IgnoreBaseAccess); 1511 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1512 bool InOverloadResolution, 1513 QualType &ConvertedType); 1514 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1515 CastKind &Kind, 1516 CXXCastPath &BasePath, 1517 bool IgnoreBaseAccess); 1518 bool IsQualificationConversion(QualType FromType, QualType ToType, 1519 bool CStyle, bool &ObjCLifetimeConversion); 1520 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1521 QualType &ResultTy); 1522 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1523 1524 1525 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1526 const VarDecl *NRVOCandidate, 1527 QualType ResultType, 1528 Expr *Value, 1529 bool AllowNRVO = true); 1530 1531 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1532 ExprResult Init); 1533 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1534 SourceLocation EqualLoc, 1535 ExprResult Init, 1536 bool TopLevelOfInitList = false, 1537 bool AllowExplicit = false); 1538 ExprResult PerformObjectArgumentInitialization(Expr *From, 1539 NestedNameSpecifier *Qualifier, 1540 NamedDecl *FoundDecl, 1541 CXXMethodDecl *Method); 1542 1543 ExprResult PerformContextuallyConvertToBool(Expr *From); 1544 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1545 1546 /// Contexts in which a converted constant expression is required. 1547 enum CCEKind { 1548 CCEK_CaseValue, ///< Expression in a case label. 1549 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1550 CCEK_TemplateArg ///< Value of a non-type template parameter. 1551 }; 1552 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1553 llvm::APSInt &Value, CCEKind CCE); 1554 1555 ExprResult 1556 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1557 const PartialDiagnostic &NotIntDiag, 1558 const PartialDiagnostic &IncompleteDiag, 1559 const PartialDiagnostic &ExplicitConvDiag, 1560 const PartialDiagnostic &ExplicitConvNote, 1561 const PartialDiagnostic &AmbigDiag, 1562 const PartialDiagnostic &AmbigNote, 1563 const PartialDiagnostic &ConvDiag, 1564 bool AllowScopedEnumerations); 1565 enum ObjCSubscriptKind { 1566 OS_Array, 1567 OS_Dictionary, 1568 OS_Error 1569 }; 1570 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE); 1571 1572 ExprResult PerformObjectMemberConversion(Expr *From, 1573 NestedNameSpecifier *Qualifier, 1574 NamedDecl *FoundDecl, 1575 NamedDecl *Member); 1576 1577 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1578 // TODO: make this is a typesafe union. 1579 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1580 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1581 1582 void AddOverloadCandidate(FunctionDecl *Function, 1583 DeclAccessPair FoundDecl, 1584 llvm::ArrayRef<Expr *> Args, 1585 OverloadCandidateSet& CandidateSet, 1586 bool SuppressUserConversions = false, 1587 bool PartialOverloading = false, 1588 bool AllowExplicit = false); 1589 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1590 llvm::ArrayRef<Expr *> Args, 1591 OverloadCandidateSet& CandidateSet, 1592 bool SuppressUserConversions = false, 1593 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 1594 void AddMethodCandidate(DeclAccessPair FoundDecl, 1595 QualType ObjectType, 1596 Expr::Classification ObjectClassification, 1597 Expr **Args, unsigned NumArgs, 1598 OverloadCandidateSet& CandidateSet, 1599 bool SuppressUserConversion = false); 1600 void AddMethodCandidate(CXXMethodDecl *Method, 1601 DeclAccessPair FoundDecl, 1602 CXXRecordDecl *ActingContext, QualType ObjectType, 1603 Expr::Classification ObjectClassification, 1604 llvm::ArrayRef<Expr *> Args, 1605 OverloadCandidateSet& CandidateSet, 1606 bool SuppressUserConversions = false); 1607 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1608 DeclAccessPair FoundDecl, 1609 CXXRecordDecl *ActingContext, 1610 TemplateArgumentListInfo *ExplicitTemplateArgs, 1611 QualType ObjectType, 1612 Expr::Classification ObjectClassification, 1613 llvm::ArrayRef<Expr *> Args, 1614 OverloadCandidateSet& CandidateSet, 1615 bool SuppressUserConversions = false); 1616 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1617 DeclAccessPair FoundDecl, 1618 TemplateArgumentListInfo *ExplicitTemplateArgs, 1619 llvm::ArrayRef<Expr *> Args, 1620 OverloadCandidateSet& CandidateSet, 1621 bool SuppressUserConversions = false); 1622 void AddConversionCandidate(CXXConversionDecl *Conversion, 1623 DeclAccessPair FoundDecl, 1624 CXXRecordDecl *ActingContext, 1625 Expr *From, QualType ToType, 1626 OverloadCandidateSet& CandidateSet); 1627 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1628 DeclAccessPair FoundDecl, 1629 CXXRecordDecl *ActingContext, 1630 Expr *From, QualType ToType, 1631 OverloadCandidateSet &CandidateSet); 1632 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1633 DeclAccessPair FoundDecl, 1634 CXXRecordDecl *ActingContext, 1635 const FunctionProtoType *Proto, 1636 Expr *Object, llvm::ArrayRef<Expr*> Args, 1637 OverloadCandidateSet& CandidateSet); 1638 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1639 SourceLocation OpLoc, 1640 Expr **Args, unsigned NumArgs, 1641 OverloadCandidateSet& CandidateSet, 1642 SourceRange OpRange = SourceRange()); 1643 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1644 Expr **Args, unsigned NumArgs, 1645 OverloadCandidateSet& CandidateSet, 1646 bool IsAssignmentOperator = false, 1647 unsigned NumContextualBoolArguments = 0); 1648 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1649 SourceLocation OpLoc, 1650 Expr **Args, unsigned NumArgs, 1651 OverloadCandidateSet& CandidateSet); 1652 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1653 bool Operator, SourceLocation Loc, 1654 llvm::ArrayRef<Expr *> Args, 1655 TemplateArgumentListInfo *ExplicitTemplateArgs, 1656 OverloadCandidateSet& CandidateSet, 1657 bool PartialOverloading = false, 1658 bool StdNamespaceIsAssociated = false); 1659 1660 // Emit as a 'note' the specific overload candidate 1661 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1662 1663 // Emit as a series of 'note's all template and non-templates 1664 // identified by the expression Expr 1665 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1666 1667 // [PossiblyAFunctionType] --> [Return] 1668 // NonFunctionType --> NonFunctionType 1669 // R (A) --> R(A) 1670 // R (*)(A) --> R (A) 1671 // R (&)(A) --> R (A) 1672 // R (S::*)(A) --> R (A) 1673 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1674 1675 FunctionDecl * 1676 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1677 QualType TargetType, 1678 bool Complain, 1679 DeclAccessPair &Found, 1680 bool *pHadMultipleCandidates = 0); 1681 1682 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1683 bool Complain = false, 1684 DeclAccessPair* Found = 0); 1685 1686 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1687 ExprResult &SrcExpr, 1688 bool DoFunctionPointerConverion = false, 1689 bool Complain = false, 1690 const SourceRange& OpRangeForComplaining = SourceRange(), 1691 QualType DestTypeForComplaining = QualType(), 1692 unsigned DiagIDForComplaining = 0); 1693 1694 1695 Expr *FixOverloadedFunctionReference(Expr *E, 1696 DeclAccessPair FoundDecl, 1697 FunctionDecl *Fn); 1698 ExprResult FixOverloadedFunctionReference(ExprResult, 1699 DeclAccessPair FoundDecl, 1700 FunctionDecl *Fn); 1701 1702 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1703 llvm::ArrayRef<Expr *> Args, 1704 OverloadCandidateSet &CandidateSet, 1705 bool PartialOverloading = false); 1706 1707 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1708 UnresolvedLookupExpr *ULE, 1709 SourceLocation LParenLoc, 1710 Expr **Args, unsigned NumArgs, 1711 SourceLocation RParenLoc, 1712 Expr *ExecConfig, 1713 bool AllowTypoCorrection=true); 1714 1715 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1716 unsigned Opc, 1717 const UnresolvedSetImpl &Fns, 1718 Expr *input); 1719 1720 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1721 unsigned Opc, 1722 const UnresolvedSetImpl &Fns, 1723 Expr *LHS, Expr *RHS); 1724 1725 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1726 SourceLocation RLoc, 1727 Expr *Base,Expr *Idx); 1728 1729 ExprResult 1730 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1731 SourceLocation LParenLoc, Expr **Args, 1732 unsigned NumArgs, SourceLocation RParenLoc); 1733 ExprResult 1734 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1735 Expr **Args, unsigned NumArgs, 1736 SourceLocation RParenLoc); 1737 1738 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1739 SourceLocation OpLoc); 1740 1741 /// CheckCallReturnType - Checks that a call expression's return type is 1742 /// complete. Returns true on failure. The location passed in is the location 1743 /// that best represents the call. 1744 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1745 CallExpr *CE, FunctionDecl *FD); 1746 1747 /// Helpers for dealing with blocks and functions. 1748 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1749 bool CheckParameterNames); 1750 void CheckCXXDefaultArguments(FunctionDecl *FD); 1751 void CheckExtraCXXDefaultArguments(Declarator &D); 1752 Scope *getNonFieldDeclScope(Scope *S); 1753 1754 /// \name Name lookup 1755 /// 1756 /// These routines provide name lookup that is used during semantic 1757 /// analysis to resolve the various kinds of names (identifiers, 1758 /// overloaded operator names, constructor names, etc.) into zero or 1759 /// more declarations within a particular scope. The major entry 1760 /// points are LookupName, which performs unqualified name lookup, 1761 /// and LookupQualifiedName, which performs qualified name lookup. 1762 /// 1763 /// All name lookup is performed based on some specific criteria, 1764 /// which specify what names will be visible to name lookup and how 1765 /// far name lookup should work. These criteria are important both 1766 /// for capturing language semantics (certain lookups will ignore 1767 /// certain names, for example) and for performance, since name 1768 /// lookup is often a bottleneck in the compilation of C++. Name 1769 /// lookup criteria is specified via the LookupCriteria enumeration. 1770 /// 1771 /// The results of name lookup can vary based on the kind of name 1772 /// lookup performed, the current language, and the translation 1773 /// unit. In C, for example, name lookup will either return nothing 1774 /// (no entity found) or a single declaration. In C++, name lookup 1775 /// can additionally refer to a set of overloaded functions or 1776 /// result in an ambiguity. All of the possible results of name 1777 /// lookup are captured by the LookupResult class, which provides 1778 /// the ability to distinguish among them. 1779 //@{ 1780 1781 /// @brief Describes the kind of name lookup to perform. 1782 enum LookupNameKind { 1783 /// Ordinary name lookup, which finds ordinary names (functions, 1784 /// variables, typedefs, etc.) in C and most kinds of names 1785 /// (functions, variables, members, types, etc.) in C++. 1786 LookupOrdinaryName = 0, 1787 /// Tag name lookup, which finds the names of enums, classes, 1788 /// structs, and unions. 1789 LookupTagName, 1790 /// Label name lookup. 1791 LookupLabel, 1792 /// Member name lookup, which finds the names of 1793 /// class/struct/union members. 1794 LookupMemberName, 1795 /// Look up of an operator name (e.g., operator+) for use with 1796 /// operator overloading. This lookup is similar to ordinary name 1797 /// lookup, but will ignore any declarations that are class members. 1798 LookupOperatorName, 1799 /// Look up of a name that precedes the '::' scope resolution 1800 /// operator in C++. This lookup completely ignores operator, object, 1801 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1802 LookupNestedNameSpecifierName, 1803 /// Look up a namespace name within a C++ using directive or 1804 /// namespace alias definition, ignoring non-namespace names (C++ 1805 /// [basic.lookup.udir]p1). 1806 LookupNamespaceName, 1807 /// Look up all declarations in a scope with the given name, 1808 /// including resolved using declarations. This is appropriate 1809 /// for checking redeclarations for a using declaration. 1810 LookupUsingDeclName, 1811 /// Look up an ordinary name that is going to be redeclared as a 1812 /// name with linkage. This lookup ignores any declarations that 1813 /// are outside of the current scope unless they have linkage. See 1814 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1815 LookupRedeclarationWithLinkage, 1816 /// Look up the name of an Objective-C protocol. 1817 LookupObjCProtocolName, 1818 /// Look up implicit 'self' parameter of an objective-c method. 1819 LookupObjCImplicitSelfParam, 1820 /// \brief Look up any declaration with any name. 1821 LookupAnyName 1822 }; 1823 1824 /// \brief Specifies whether (or how) name lookup is being performed for a 1825 /// redeclaration (vs. a reference). 1826 enum RedeclarationKind { 1827 /// \brief The lookup is a reference to this name that is not for the 1828 /// purpose of redeclaring the name. 1829 NotForRedeclaration = 0, 1830 /// \brief The lookup results will be used for redeclaration of a name, 1831 /// if an entity by that name already exists. 1832 ForRedeclaration 1833 }; 1834 1835 /// \brief The possible outcomes of name lookup for a literal operator. 1836 enum LiteralOperatorLookupResult { 1837 /// \brief The lookup resulted in an error. 1838 LOLR_Error, 1839 /// \brief The lookup found a single 'cooked' literal operator, which 1840 /// expects a normal literal to be built and passed to it. 1841 LOLR_Cooked, 1842 /// \brief The lookup found a single 'raw' literal operator, which expects 1843 /// a string literal containing the spelling of the literal token. 1844 LOLR_Raw, 1845 /// \brief The lookup found an overload set of literal operator templates, 1846 /// which expect the characters of the spelling of the literal token to be 1847 /// passed as a non-type template argument pack. 1848 LOLR_Template 1849 }; 1850 1851 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1852 CXXSpecialMember SM, 1853 bool ConstArg, 1854 bool VolatileArg, 1855 bool RValueThis, 1856 bool ConstThis, 1857 bool VolatileThis); 1858 1859private: 1860 bool CppLookupName(LookupResult &R, Scope *S); 1861 1862 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1863 // 1864 // The boolean value will be true to indicate that the namespace was loaded 1865 // from an AST/PCH file, or false otherwise. 1866 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1867 1868 /// \brief Whether we have already loaded known namespaces from an extenal 1869 /// source. 1870 bool LoadedExternalKnownNamespaces; 1871 1872public: 1873 /// \brief Look up a name, looking for a single declaration. Return 1874 /// null if the results were absent, ambiguous, or overloaded. 1875 /// 1876 /// It is preferable to use the elaborated form and explicitly handle 1877 /// ambiguity and overloaded. 1878 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1879 SourceLocation Loc, 1880 LookupNameKind NameKind, 1881 RedeclarationKind Redecl 1882 = NotForRedeclaration); 1883 bool LookupName(LookupResult &R, Scope *S, 1884 bool AllowBuiltinCreation = false); 1885 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1886 bool InUnqualifiedLookup = false); 1887 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1888 bool AllowBuiltinCreation = false, 1889 bool EnteringContext = false); 1890 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1891 RedeclarationKind Redecl 1892 = NotForRedeclaration); 1893 1894 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1895 QualType T1, QualType T2, 1896 UnresolvedSetImpl &Functions); 1897 1898 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1899 SourceLocation GnuLabelLoc = SourceLocation()); 1900 1901 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1902 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1903 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1904 unsigned Quals, 1905 bool *ConstParam = 0); 1906 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1907 bool RValueThis, unsigned ThisQuals, 1908 bool *ConstParam = 0); 1909 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1910 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1911 unsigned ThisQuals); 1912 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1913 1914 LiteralOperatorLookupResult LookupLiteralOperator(Scope *S, LookupResult &R, 1915 ArrayRef<QualType> ArgTys, 1916 bool AllowRawAndTemplate); 1917 1918 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1919 SourceLocation Loc, 1920 llvm::ArrayRef<Expr *> Args, 1921 ADLResult &Functions, 1922 bool StdNamespaceIsAssociated = false); 1923 1924 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1925 VisibleDeclConsumer &Consumer, 1926 bool IncludeGlobalScope = true); 1927 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1928 VisibleDeclConsumer &Consumer, 1929 bool IncludeGlobalScope = true); 1930 1931 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1932 Sema::LookupNameKind LookupKind, 1933 Scope *S, CXXScopeSpec *SS, 1934 CorrectionCandidateCallback &CCC, 1935 DeclContext *MemberContext = 0, 1936 bool EnteringContext = false, 1937 const ObjCObjectPointerType *OPT = 0); 1938 1939 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 1940 AssociatedNamespaceSet &AssociatedNamespaces, 1941 AssociatedClassSet &AssociatedClasses); 1942 1943 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1944 bool ConsiderLinkage, 1945 bool ExplicitInstantiationOrSpecialization); 1946 1947 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1948 //@} 1949 1950 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1951 SourceLocation IdLoc, 1952 bool TypoCorrection = false); 1953 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1954 Scope *S, bool ForRedeclaration, 1955 SourceLocation Loc); 1956 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1957 Scope *S); 1958 void AddKnownFunctionAttributes(FunctionDecl *FD); 1959 1960 // More parsing and symbol table subroutines. 1961 1962 // Decl attributes - this routine is the top level dispatcher. 1963 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1964 bool NonInheritable = true, bool Inheritable = true); 1965 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1966 bool NonInheritable = true, bool Inheritable = true); 1967 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1968 const AttributeList *AttrList); 1969 1970 void checkUnusedDeclAttributes(Declarator &D); 1971 1972 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1973 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1974 bool CheckNoReturnAttr(const AttributeList &attr); 1975 1976 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1977 bool &IncompleteImpl, unsigned DiagID); 1978 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1979 ObjCMethodDecl *MethodDecl, 1980 bool IsProtocolMethodDecl); 1981 1982 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1983 ObjCMethodDecl *Overridden, 1984 bool IsProtocolMethodDecl); 1985 1986 /// WarnExactTypedMethods - This routine issues a warning if method 1987 /// implementation declaration matches exactly that of its declaration. 1988 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1989 ObjCMethodDecl *MethodDecl, 1990 bool IsProtocolMethodDecl); 1991 1992 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1993 ObjCInterfaceDecl *IDecl); 1994 1995 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1996 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1997 1998 /// CheckProtocolMethodDefs - This routine checks unimplemented 1999 /// methods declared in protocol, and those referenced by it. 2000 /// \param IDecl - Used for checking for methods which may have been 2001 /// inherited. 2002 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 2003 ObjCProtocolDecl *PDecl, 2004 bool& IncompleteImpl, 2005 const SelectorSet &InsMap, 2006 const SelectorSet &ClsMap, 2007 ObjCContainerDecl *CDecl); 2008 2009 /// CheckImplementationIvars - This routine checks if the instance variables 2010 /// listed in the implelementation match those listed in the interface. 2011 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 2012 ObjCIvarDecl **Fields, unsigned nIvars, 2013 SourceLocation Loc); 2014 2015 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 2016 /// remains unimplemented in the class or category @implementation. 2017 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 2018 ObjCContainerDecl* IDecl, 2019 bool IncompleteImpl = false); 2020 2021 /// DiagnoseUnimplementedProperties - This routine warns on those properties 2022 /// which must be implemented by this implementation. 2023 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 2024 ObjCContainerDecl *CDecl, 2025 const SelectorSet &InsMap); 2026 2027 /// DefaultSynthesizeProperties - This routine default synthesizes all 2028 /// properties which must be synthesized in class's @implementation. 2029 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 2030 ObjCInterfaceDecl *IDecl); 2031 void DefaultSynthesizeProperties(Scope *S, Decl *D); 2032 2033 /// CollectImmediateProperties - This routine collects all properties in 2034 /// the class and its conforming protocols; but not those it its super class. 2035 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 2036 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 2037 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 2038 2039 2040 /// LookupPropertyDecl - Looks up a property in the current class and all 2041 /// its protocols. 2042 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 2043 IdentifierInfo *II); 2044 2045 /// Called by ActOnProperty to handle @property declarations in 2046 //// class extensions. 2047 Decl *HandlePropertyInClassExtension(Scope *S, 2048 SourceLocation AtLoc, 2049 SourceLocation LParenLoc, 2050 FieldDeclarator &FD, 2051 Selector GetterSel, 2052 Selector SetterSel, 2053 const bool isAssign, 2054 const bool isReadWrite, 2055 const unsigned Attributes, 2056 const unsigned AttributesAsWritten, 2057 bool *isOverridingProperty, 2058 TypeSourceInfo *T, 2059 tok::ObjCKeywordKind MethodImplKind); 2060 2061 /// Called by ActOnProperty and HandlePropertyInClassExtension to 2062 /// handle creating the ObjcPropertyDecl for a category or @interface. 2063 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 2064 ObjCContainerDecl *CDecl, 2065 SourceLocation AtLoc, 2066 SourceLocation LParenLoc, 2067 FieldDeclarator &FD, 2068 Selector GetterSel, 2069 Selector SetterSel, 2070 const bool isAssign, 2071 const bool isReadWrite, 2072 const unsigned Attributes, 2073 const unsigned AttributesAsWritten, 2074 TypeSourceInfo *T, 2075 tok::ObjCKeywordKind MethodImplKind, 2076 DeclContext *lexicalDC = 0); 2077 2078 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2079 /// warning) when atomic property has one but not the other user-declared 2080 /// setter or getter. 2081 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2082 ObjCContainerDecl* IDecl); 2083 2084 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2085 2086 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2087 2088 enum MethodMatchStrategy { 2089 MMS_loose, 2090 MMS_strict 2091 }; 2092 2093 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2094 /// true, or false, accordingly. 2095 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2096 const ObjCMethodDecl *PrevMethod, 2097 MethodMatchStrategy strategy = MMS_strict); 2098 2099 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2100 /// or protocol against those declared in their implementations. 2101 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2102 const SelectorSet &ClsMap, 2103 SelectorSet &InsMapSeen, 2104 SelectorSet &ClsMapSeen, 2105 ObjCImplDecl* IMPDecl, 2106 ObjCContainerDecl* IDecl, 2107 bool &IncompleteImpl, 2108 bool ImmediateClass, 2109 bool WarnCategoryMethodImpl=false); 2110 2111 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2112 /// category matches with those implemented in its primary class and 2113 /// warns each time an exact match is found. 2114 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2115 2116 /// \brief Add the given method to the list of globally-known methods. 2117 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2118 2119private: 2120 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2121 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2122 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2123 2124 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2125 /// optionally warns if there are multiple signatures. 2126 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2127 bool receiverIdOrClass, 2128 bool warn, bool instance); 2129 2130public: 2131 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2132 /// unit are added to a global pool. This allows us to efficiently associate 2133 /// a selector with a method declaraation for purposes of typechecking 2134 /// messages sent to "id" (where the class of the object is unknown). 2135 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2136 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2137 } 2138 2139 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2140 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2141 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2142 } 2143 2144 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2145 /// pool. 2146 void AddAnyMethodToGlobalPool(Decl *D); 2147 2148 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2149 /// there are multiple signatures. 2150 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2151 bool receiverIdOrClass=false, 2152 bool warn=true) { 2153 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2154 warn, /*instance*/true); 2155 } 2156 2157 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2158 /// there are multiple signatures. 2159 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2160 bool receiverIdOrClass=false, 2161 bool warn=true) { 2162 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2163 warn, /*instance*/false); 2164 } 2165 2166 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2167 /// implementation. 2168 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2169 2170 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2171 /// initialization. 2172 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2173 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2174 2175 //===--------------------------------------------------------------------===// 2176 // Statement Parsing Callbacks: SemaStmt.cpp. 2177public: 2178 class FullExprArg { 2179 public: 2180 FullExprArg(Sema &actions) : E(0) { } 2181 2182 // FIXME: The const_cast here is ugly. RValue references would make this 2183 // much nicer (or we could duplicate a bunch of the move semantics 2184 // emulation code from Ownership.h). 2185 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2186 2187 ExprResult release() { 2188 return move(E); 2189 } 2190 2191 Expr *get() const { return E; } 2192 2193 Expr *operator->() { 2194 return E; 2195 } 2196 2197 private: 2198 // FIXME: No need to make the entire Sema class a friend when it's just 2199 // Sema::MakeFullExpr that needs access to the constructor below. 2200 friend class Sema; 2201 2202 explicit FullExprArg(Expr *expr) : E(expr) {} 2203 2204 Expr *E; 2205 }; 2206 2207 FullExprArg MakeFullExpr(Expr *Arg) { 2208 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2209 } 2210 2211 StmtResult ActOnExprStmt(FullExprArg Expr); 2212 2213 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2214 bool HasLeadingEmptyMacro = false); 2215 2216 void ActOnStartOfCompoundStmt(); 2217 void ActOnFinishOfCompoundStmt(); 2218 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2219 MultiStmtArg Elts, 2220 bool isStmtExpr); 2221 2222 /// \brief A RAII object to enter scope of a compound statement. 2223 class CompoundScopeRAII { 2224 public: 2225 CompoundScopeRAII(Sema &S): S(S) { 2226 S.ActOnStartOfCompoundStmt(); 2227 } 2228 2229 ~CompoundScopeRAII() { 2230 S.ActOnFinishOfCompoundStmt(); 2231 } 2232 2233 private: 2234 Sema &S; 2235 }; 2236 2237 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2238 SourceLocation StartLoc, 2239 SourceLocation EndLoc); 2240 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2241 StmtResult ActOnForEachLValueExpr(Expr *E); 2242 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2243 SourceLocation DotDotDotLoc, Expr *RHSVal, 2244 SourceLocation ColonLoc); 2245 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2246 2247 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2248 SourceLocation ColonLoc, 2249 Stmt *SubStmt, Scope *CurScope); 2250 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2251 SourceLocation ColonLoc, Stmt *SubStmt); 2252 2253 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2254 FullExprArg CondVal, Decl *CondVar, 2255 Stmt *ThenVal, 2256 SourceLocation ElseLoc, Stmt *ElseVal); 2257 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2258 Expr *Cond, 2259 Decl *CondVar); 2260 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2261 Stmt *Switch, Stmt *Body); 2262 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2263 FullExprArg Cond, 2264 Decl *CondVar, Stmt *Body); 2265 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2266 SourceLocation WhileLoc, 2267 SourceLocation CondLParen, Expr *Cond, 2268 SourceLocation CondRParen); 2269 2270 StmtResult ActOnForStmt(SourceLocation ForLoc, 2271 SourceLocation LParenLoc, 2272 Stmt *First, FullExprArg Second, 2273 Decl *SecondVar, 2274 FullExprArg Third, 2275 SourceLocation RParenLoc, 2276 Stmt *Body); 2277 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2278 Expr *collection); 2279 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2280 SourceLocation LParenLoc, 2281 Stmt *First, Expr *Second, 2282 SourceLocation RParenLoc, Stmt *Body); 2283 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2284 SourceLocation LParenLoc, Stmt *LoopVar, 2285 SourceLocation ColonLoc, Expr *Collection, 2286 SourceLocation RParenLoc); 2287 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2288 SourceLocation ColonLoc, 2289 Stmt *RangeDecl, Stmt *BeginEndDecl, 2290 Expr *Cond, Expr *Inc, 2291 Stmt *LoopVarDecl, 2292 SourceLocation RParenLoc); 2293 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2294 2295 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2296 SourceLocation LabelLoc, 2297 LabelDecl *TheDecl); 2298 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2299 SourceLocation StarLoc, 2300 Expr *DestExp); 2301 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2302 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2303 2304 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2305 bool AllowFunctionParameters); 2306 2307 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2308 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2309 2310 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2311 bool IsSimple, bool IsVolatile, 2312 unsigned NumOutputs, unsigned NumInputs, 2313 IdentifierInfo **Names, 2314 MultiExprArg Constraints, 2315 MultiExprArg Exprs, 2316 Expr *AsmString, 2317 MultiExprArg Clobbers, 2318 SourceLocation RParenLoc, 2319 bool MSAsm = false); 2320 2321 2322 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2323 SourceLocation StartLoc, 2324 SourceLocation IdLoc, IdentifierInfo *Id, 2325 bool Invalid = false); 2326 2327 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2328 2329 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2330 Decl *Parm, Stmt *Body); 2331 2332 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2333 2334 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2335 MultiStmtArg Catch, Stmt *Finally); 2336 2337 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2338 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2339 Scope *CurScope); 2340 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2341 Expr *operand); 2342 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2343 Expr *SynchExpr, 2344 Stmt *SynchBody); 2345 2346 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2347 2348 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2349 SourceLocation StartLoc, 2350 SourceLocation IdLoc, 2351 IdentifierInfo *Id); 2352 2353 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2354 2355 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2356 Decl *ExDecl, Stmt *HandlerBlock); 2357 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2358 MultiStmtArg Handlers); 2359 2360 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2361 SourceLocation TryLoc, 2362 Stmt *TryBlock, 2363 Stmt *Handler); 2364 2365 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2366 Expr *FilterExpr, 2367 Stmt *Block); 2368 2369 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2370 Stmt *Block); 2371 2372 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2373 2374 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2375 2376 /// \brief If it's a file scoped decl that must warn if not used, keep track 2377 /// of it. 2378 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2379 2380 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2381 /// whose result is unused, warn. 2382 void DiagnoseUnusedExprResult(const Stmt *S); 2383 void DiagnoseUnusedDecl(const NamedDecl *ND); 2384 2385 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2386 /// statement as a \p Body, and it is located on the same line. 2387 /// 2388 /// This helps prevent bugs due to typos, such as: 2389 /// if (condition); 2390 /// do_stuff(); 2391 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2392 const Stmt *Body, 2393 unsigned DiagID); 2394 2395 /// Warn if a for/while loop statement \p S, which is followed by 2396 /// \p PossibleBody, has a suspicious null statement as a body. 2397 void DiagnoseEmptyLoopBody(const Stmt *S, 2398 const Stmt *PossibleBody); 2399 2400 ParsingDeclState PushParsingDeclaration() { 2401 return DelayedDiagnostics.pushParsingDecl(); 2402 } 2403 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2404 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2405 } 2406 2407 typedef ProcessingContextState ParsingClassState; 2408 ParsingClassState PushParsingClass() { 2409 return DelayedDiagnostics.pushContext(); 2410 } 2411 void PopParsingClass(ParsingClassState state) { 2412 DelayedDiagnostics.popContext(state); 2413 } 2414 2415 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2416 SourceLocation Loc, 2417 const ObjCInterfaceDecl *UnknownObjCClass=0); 2418 2419 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2420 2421 bool makeUnavailableInSystemHeader(SourceLocation loc, 2422 StringRef message); 2423 2424 //===--------------------------------------------------------------------===// 2425 // Expression Parsing Callbacks: SemaExpr.cpp. 2426 2427 bool CanUseDecl(NamedDecl *D); 2428 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2429 const ObjCInterfaceDecl *UnknownObjCClass=0); 2430 void NoteDeletedFunction(FunctionDecl *FD); 2431 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2432 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2433 ObjCMethodDecl *Getter, 2434 SourceLocation Loc); 2435 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2436 Expr **Args, unsigned NumArgs); 2437 2438 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2439 Decl *LambdaContextDecl = 0, 2440 bool IsDecltype = false); 2441 2442 void PopExpressionEvaluationContext(); 2443 2444 void DiscardCleanupsInEvaluationContext(); 2445 2446 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2447 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2448 2449 ExprResult ActOnConstantExpression(ExprResult Res); 2450 2451 // Functions for marking a declaration referenced. These functions also 2452 // contain the relevant logic for marking if a reference to a function or 2453 // variable is an odr-use (in the C++11 sense). There are separate variants 2454 // for expressions referring to a decl; these exist because odr-use marking 2455 // needs to be delayed for some constant variables when we build one of the 2456 // named expressions. 2457 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2458 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2459 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2460 void MarkDeclRefReferenced(DeclRefExpr *E); 2461 void MarkMemberReferenced(MemberExpr *E); 2462 2463 void UpdateMarkingForLValueToRValue(Expr *E); 2464 void CleanupVarDeclMarking(); 2465 2466 enum TryCaptureKind { 2467 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2468 }; 2469 2470 /// \brief Try to capture the given variable. 2471 /// 2472 /// \param Var The variable to capture. 2473 /// 2474 /// \param Loc The location at which the capture occurs. 2475 /// 2476 /// \param Kind The kind of capture, which may be implicit (for either a 2477 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2478 /// 2479 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2480 /// an explicit lambda capture. 2481 /// 2482 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2483 /// captures or diagnose errors. If false, this routine merely check whether 2484 /// the capture can occur without performing the capture itself or complaining 2485 /// if the variable cannot be captured. 2486 /// 2487 /// \param CaptureType Will be set to the type of the field used to capture 2488 /// this variable in the innermost block or lambda. Only valid when the 2489 /// variable can be captured. 2490 /// 2491 /// \param DeclRefType Will be set to the type of a refernce to the capture 2492 /// from within the current scope. Only valid when the variable can be 2493 /// captured. 2494 /// 2495 /// \returns true if an error occurred (i.e., the variable cannot be 2496 /// captured) and false if the capture succeeded. 2497 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2498 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2499 QualType &CaptureType, 2500 QualType &DeclRefType); 2501 2502 /// \brief Try to capture the given variable. 2503 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2504 TryCaptureKind Kind = TryCapture_Implicit, 2505 SourceLocation EllipsisLoc = SourceLocation()); 2506 2507 /// \brief Given a variable, determine the type that a reference to that 2508 /// variable will have in the given scope. 2509 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2510 2511 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2512 void MarkDeclarationsReferencedInExpr(Expr *E, 2513 bool SkipLocalVariables = false); 2514 2515 /// \brief Try to recover by turning the given expression into a 2516 /// call. Returns true if recovery was attempted or an error was 2517 /// emitted; this may also leave the ExprResult invalid. 2518 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2519 bool ForceComplain = false, 2520 bool (*IsPlausibleResult)(QualType) = 0); 2521 2522 /// \brief Figure out if an expression could be turned into a call. 2523 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2524 UnresolvedSetImpl &NonTemplateOverloads); 2525 2526 /// \brief Conditionally issue a diagnostic based on the current 2527 /// evaluation context. 2528 /// 2529 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2530 /// the function body is parsed, and then do a basic reachability analysis to 2531 /// determine if the statement is reachable. If it is unreachable, the 2532 /// diagnostic will not be emitted. 2533 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2534 const PartialDiagnostic &PD); 2535 2536 // Primary Expressions. 2537 SourceRange getExprRange(Expr *E) const; 2538 2539 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2540 SourceLocation TemplateKWLoc, 2541 UnqualifiedId &Id, 2542 bool HasTrailingLParen, bool IsAddressOfOperand, 2543 CorrectionCandidateCallback *CCC = 0); 2544 2545 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2546 TemplateArgumentListInfo &Buffer, 2547 DeclarationNameInfo &NameInfo, 2548 const TemplateArgumentListInfo *&TemplateArgs); 2549 2550 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2551 CorrectionCandidateCallback &CCC, 2552 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2553 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2554 2555 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2556 IdentifierInfo *II, 2557 bool AllowBuiltinCreation=false); 2558 2559 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2560 SourceLocation TemplateKWLoc, 2561 const DeclarationNameInfo &NameInfo, 2562 bool isAddressOfOperand, 2563 const TemplateArgumentListInfo *TemplateArgs); 2564 2565 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2566 ExprValueKind VK, 2567 SourceLocation Loc, 2568 const CXXScopeSpec *SS = 0); 2569 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2570 ExprValueKind VK, 2571 const DeclarationNameInfo &NameInfo, 2572 const CXXScopeSpec *SS = 0); 2573 ExprResult 2574 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2575 SourceLocation nameLoc, 2576 IndirectFieldDecl *indirectField, 2577 Expr *baseObjectExpr = 0, 2578 SourceLocation opLoc = SourceLocation()); 2579 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2580 SourceLocation TemplateKWLoc, 2581 LookupResult &R, 2582 const TemplateArgumentListInfo *TemplateArgs); 2583 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2584 SourceLocation TemplateKWLoc, 2585 LookupResult &R, 2586 const TemplateArgumentListInfo *TemplateArgs, 2587 bool IsDefiniteInstance); 2588 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2589 const LookupResult &R, 2590 bool HasTrailingLParen); 2591 2592 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2593 const DeclarationNameInfo &NameInfo); 2594 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2595 SourceLocation TemplateKWLoc, 2596 const DeclarationNameInfo &NameInfo, 2597 const TemplateArgumentListInfo *TemplateArgs); 2598 2599 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2600 LookupResult &R, 2601 bool NeedsADL); 2602 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2603 const DeclarationNameInfo &NameInfo, 2604 NamedDecl *D); 2605 2606 ExprResult BuildLiteralOperatorCall(LookupResult &R, 2607 DeclarationNameInfo &SuffixInfo, 2608 ArrayRef<Expr*> Args, 2609 SourceLocation LitEndLoc, 2610 TemplateArgumentListInfo *ExplicitTemplateArgs = 0); 2611 2612 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2613 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val); 2614 ExprResult ActOnNumericConstant(const Token &Tok, Scope *UDLScope = 0); 2615 ExprResult ActOnCharacterConstant(const Token &Tok, Scope *UDLScope = 0); 2616 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2617 ExprResult ActOnParenListExpr(SourceLocation L, 2618 SourceLocation R, 2619 MultiExprArg Val); 2620 2621 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2622 /// fragments (e.g. "foo" "bar" L"baz"). 2623 ExprResult ActOnStringLiteral(const Token *StringToks, unsigned NumStringToks, 2624 Scope *UDLScope = 0); 2625 2626 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2627 SourceLocation DefaultLoc, 2628 SourceLocation RParenLoc, 2629 Expr *ControllingExpr, 2630 MultiTypeArg ArgTypes, 2631 MultiExprArg ArgExprs); 2632 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2633 SourceLocation DefaultLoc, 2634 SourceLocation RParenLoc, 2635 Expr *ControllingExpr, 2636 TypeSourceInfo **Types, 2637 Expr **Exprs, 2638 unsigned NumAssocs); 2639 2640 // Binary/Unary Operators. 'Tok' is the token for the operator. 2641 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2642 Expr *InputExpr); 2643 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2644 UnaryOperatorKind Opc, Expr *Input); 2645 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2646 tok::TokenKind Op, Expr *Input); 2647 2648 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2649 SourceLocation OpLoc, 2650 UnaryExprOrTypeTrait ExprKind, 2651 SourceRange R); 2652 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2653 UnaryExprOrTypeTrait ExprKind); 2654 ExprResult 2655 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2656 UnaryExprOrTypeTrait ExprKind, 2657 bool IsType, void *TyOrEx, 2658 const SourceRange &ArgRange); 2659 2660 ExprResult CheckPlaceholderExpr(Expr *E); 2661 bool CheckVecStepExpr(Expr *E); 2662 2663 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2664 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2665 SourceRange ExprRange, 2666 UnaryExprOrTypeTrait ExprKind); 2667 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2668 SourceLocation OpLoc, 2669 IdentifierInfo &Name, 2670 SourceLocation NameLoc, 2671 SourceLocation RParenLoc); 2672 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2673 tok::TokenKind Kind, Expr *Input); 2674 2675 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2676 Expr *Idx, SourceLocation RLoc); 2677 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2678 Expr *Idx, SourceLocation RLoc); 2679 2680 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2681 SourceLocation OpLoc, bool IsArrow, 2682 CXXScopeSpec &SS, 2683 SourceLocation TemplateKWLoc, 2684 NamedDecl *FirstQualifierInScope, 2685 const DeclarationNameInfo &NameInfo, 2686 const TemplateArgumentListInfo *TemplateArgs); 2687 2688 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2689 SourceLocation OpLoc, bool IsArrow, 2690 const CXXScopeSpec &SS, 2691 SourceLocation TemplateKWLoc, 2692 NamedDecl *FirstQualifierInScope, 2693 LookupResult &R, 2694 const TemplateArgumentListInfo *TemplateArgs, 2695 bool SuppressQualifierCheck = false); 2696 2697 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2698 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2699 bool &IsArrow, SourceLocation OpLoc, 2700 CXXScopeSpec &SS, 2701 Decl *ObjCImpDecl, 2702 bool HasTemplateArgs); 2703 2704 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2705 const CXXScopeSpec &SS, 2706 const LookupResult &R); 2707 2708 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2709 bool IsArrow, SourceLocation OpLoc, 2710 const CXXScopeSpec &SS, 2711 SourceLocation TemplateKWLoc, 2712 NamedDecl *FirstQualifierInScope, 2713 const DeclarationNameInfo &NameInfo, 2714 const TemplateArgumentListInfo *TemplateArgs); 2715 2716 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2717 SourceLocation OpLoc, 2718 tok::TokenKind OpKind, 2719 CXXScopeSpec &SS, 2720 SourceLocation TemplateKWLoc, 2721 UnqualifiedId &Member, 2722 Decl *ObjCImpDecl, 2723 bool HasTrailingLParen); 2724 2725 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2726 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2727 FunctionDecl *FDecl, 2728 const FunctionProtoType *Proto, 2729 Expr **Args, unsigned NumArgs, 2730 SourceLocation RParenLoc, 2731 bool ExecConfig = false); 2732 void CheckStaticArrayArgument(SourceLocation CallLoc, 2733 ParmVarDecl *Param, 2734 const Expr *ArgExpr); 2735 2736 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2737 /// This provides the location of the left/right parens and a list of comma 2738 /// locations. 2739 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2740 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2741 Expr *ExecConfig = 0, bool IsExecConfig = false); 2742 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2743 SourceLocation LParenLoc, 2744 Expr **Args, unsigned NumArgs, 2745 SourceLocation RParenLoc, 2746 Expr *Config = 0, 2747 bool IsExecConfig = false); 2748 2749 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2750 MultiExprArg ExecConfig, 2751 SourceLocation GGGLoc); 2752 2753 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2754 Declarator &D, ParsedType &Ty, 2755 SourceLocation RParenLoc, Expr *CastExpr); 2756 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2757 TypeSourceInfo *Ty, 2758 SourceLocation RParenLoc, 2759 Expr *Op); 2760 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2761 2762 /// \brief Build an altivec or OpenCL literal. 2763 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2764 SourceLocation RParenLoc, Expr *E, 2765 TypeSourceInfo *TInfo); 2766 2767 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2768 2769 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2770 ParsedType Ty, 2771 SourceLocation RParenLoc, 2772 Expr *InitExpr); 2773 2774 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2775 TypeSourceInfo *TInfo, 2776 SourceLocation RParenLoc, 2777 Expr *LiteralExpr); 2778 2779 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2780 MultiExprArg InitArgList, 2781 SourceLocation RBraceLoc); 2782 2783 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2784 SourceLocation Loc, 2785 bool GNUSyntax, 2786 ExprResult Init); 2787 2788 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2789 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2790 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2791 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2792 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2793 Expr *LHSExpr, Expr *RHSExpr); 2794 2795 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2796 /// in the case of a the GNU conditional expr extension. 2797 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2798 SourceLocation ColonLoc, 2799 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2800 2801 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2802 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2803 LabelDecl *TheDecl); 2804 2805 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2806 SourceLocation RPLoc); // "({..})" 2807 2808 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2809 struct OffsetOfComponent { 2810 SourceLocation LocStart, LocEnd; 2811 bool isBrackets; // true if [expr], false if .ident 2812 union { 2813 IdentifierInfo *IdentInfo; 2814 Expr *E; 2815 } U; 2816 }; 2817 2818 /// __builtin_offsetof(type, a.b[123][456].c) 2819 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2820 TypeSourceInfo *TInfo, 2821 OffsetOfComponent *CompPtr, 2822 unsigned NumComponents, 2823 SourceLocation RParenLoc); 2824 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2825 SourceLocation BuiltinLoc, 2826 SourceLocation TypeLoc, 2827 ParsedType ParsedArgTy, 2828 OffsetOfComponent *CompPtr, 2829 unsigned NumComponents, 2830 SourceLocation RParenLoc); 2831 2832 // __builtin_choose_expr(constExpr, expr1, expr2) 2833 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2834 Expr *CondExpr, Expr *LHSExpr, 2835 Expr *RHSExpr, SourceLocation RPLoc); 2836 2837 // __builtin_va_arg(expr, type) 2838 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2839 SourceLocation RPLoc); 2840 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2841 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2842 2843 // __null 2844 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2845 2846 bool CheckCaseExpression(Expr *E); 2847 2848 /// \brief Describes the result of an "if-exists" condition check. 2849 enum IfExistsResult { 2850 /// \brief The symbol exists. 2851 IER_Exists, 2852 2853 /// \brief The symbol does not exist. 2854 IER_DoesNotExist, 2855 2856 /// \brief The name is a dependent name, so the results will differ 2857 /// from one instantiation to the next. 2858 IER_Dependent, 2859 2860 /// \brief An error occurred. 2861 IER_Error 2862 }; 2863 2864 IfExistsResult 2865 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2866 const DeclarationNameInfo &TargetNameInfo); 2867 2868 IfExistsResult 2869 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2870 bool IsIfExists, CXXScopeSpec &SS, 2871 UnqualifiedId &Name); 2872 2873 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2874 bool IsIfExists, 2875 NestedNameSpecifierLoc QualifierLoc, 2876 DeclarationNameInfo NameInfo, 2877 Stmt *Nested); 2878 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2879 bool IsIfExists, 2880 CXXScopeSpec &SS, UnqualifiedId &Name, 2881 Stmt *Nested); 2882 2883 //===------------------------- "Block" Extension ------------------------===// 2884 2885 /// ActOnBlockStart - This callback is invoked when a block literal is 2886 /// started. 2887 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2888 2889 /// ActOnBlockArguments - This callback allows processing of block arguments. 2890 /// If there are no arguments, this is still invoked. 2891 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2892 2893 /// ActOnBlockError - If there is an error parsing a block, this callback 2894 /// is invoked to pop the information about the block from the action impl. 2895 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2896 2897 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2898 /// literal was successfully completed. ^(int x){...} 2899 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2900 Scope *CurScope); 2901 2902 //===---------------------------- OpenCL Features -----------------------===// 2903 2904 /// __builtin_astype(...) 2905 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2906 SourceLocation BuiltinLoc, 2907 SourceLocation RParenLoc); 2908 2909 //===---------------------------- C++ Features --------------------------===// 2910 2911 // Act on C++ namespaces 2912 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2913 SourceLocation NamespaceLoc, 2914 SourceLocation IdentLoc, 2915 IdentifierInfo *Ident, 2916 SourceLocation LBrace, 2917 AttributeList *AttrList); 2918 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2919 2920 NamespaceDecl *getStdNamespace() const; 2921 NamespaceDecl *getOrCreateStdNamespace(); 2922 2923 CXXRecordDecl *getStdBadAlloc() const; 2924 2925 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2926 /// it is and Element is not NULL, assigns the element type to Element. 2927 bool isStdInitializerList(QualType Ty, QualType *Element); 2928 2929 /// \brief Looks for the std::initializer_list template and instantiates it 2930 /// with Element, or emits an error if it's not found. 2931 /// 2932 /// \returns The instantiated template, or null on error. 2933 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2934 2935 /// \brief Determine whether Ctor is an initializer-list constructor, as 2936 /// defined in [dcl.init.list]p2. 2937 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2938 2939 Decl *ActOnUsingDirective(Scope *CurScope, 2940 SourceLocation UsingLoc, 2941 SourceLocation NamespcLoc, 2942 CXXScopeSpec &SS, 2943 SourceLocation IdentLoc, 2944 IdentifierInfo *NamespcName, 2945 AttributeList *AttrList); 2946 2947 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2948 2949 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2950 SourceLocation NamespaceLoc, 2951 SourceLocation AliasLoc, 2952 IdentifierInfo *Alias, 2953 CXXScopeSpec &SS, 2954 SourceLocation IdentLoc, 2955 IdentifierInfo *Ident); 2956 2957 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2958 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2959 const LookupResult &PreviousDecls); 2960 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2961 NamedDecl *Target); 2962 2963 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2964 bool isTypeName, 2965 const CXXScopeSpec &SS, 2966 SourceLocation NameLoc, 2967 const LookupResult &Previous); 2968 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2969 const CXXScopeSpec &SS, 2970 SourceLocation NameLoc); 2971 2972 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2973 SourceLocation UsingLoc, 2974 CXXScopeSpec &SS, 2975 const DeclarationNameInfo &NameInfo, 2976 AttributeList *AttrList, 2977 bool IsInstantiation, 2978 bool IsTypeName, 2979 SourceLocation TypenameLoc); 2980 2981 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2982 2983 Decl *ActOnUsingDeclaration(Scope *CurScope, 2984 AccessSpecifier AS, 2985 bool HasUsingKeyword, 2986 SourceLocation UsingLoc, 2987 CXXScopeSpec &SS, 2988 UnqualifiedId &Name, 2989 AttributeList *AttrList, 2990 bool IsTypeName, 2991 SourceLocation TypenameLoc); 2992 Decl *ActOnAliasDeclaration(Scope *CurScope, 2993 AccessSpecifier AS, 2994 MultiTemplateParamsArg TemplateParams, 2995 SourceLocation UsingLoc, 2996 UnqualifiedId &Name, 2997 TypeResult Type); 2998 2999 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 3000 /// and sets it as the initializer for the the passed in VarDecl. 3001 bool InitializeVarWithConstructor(VarDecl *VD, 3002 CXXConstructorDecl *Constructor, 3003 MultiExprArg Exprs, 3004 bool HadMultipleCandidates); 3005 3006 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 3007 /// including handling of its default argument expressions. 3008 /// 3009 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 3010 ExprResult 3011 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3012 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 3013 bool HadMultipleCandidates, bool RequiresZeroInit, 3014 unsigned ConstructKind, SourceRange ParenRange); 3015 3016 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 3017 // the constructor can be elidable? 3018 ExprResult 3019 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 3020 CXXConstructorDecl *Constructor, bool Elidable, 3021 MultiExprArg Exprs, bool HadMultipleCandidates, 3022 bool RequiresZeroInit, unsigned ConstructKind, 3023 SourceRange ParenRange); 3024 3025 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 3026 /// the default expr if needed. 3027 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 3028 FunctionDecl *FD, 3029 ParmVarDecl *Param); 3030 3031 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 3032 /// constructed variable. 3033 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 3034 3035 /// \brief Helper class that collects exception specifications for 3036 /// implicitly-declared special member functions. 3037 class ImplicitExceptionSpecification { 3038 // Pointer to allow copying 3039 ASTContext *Context; 3040 // We order exception specifications thus: 3041 // noexcept is the most restrictive, but is only used in C++0x. 3042 // throw() comes next. 3043 // Then a throw(collected exceptions) 3044 // Finally no specification. 3045 // throw(...) is used instead if any called function uses it. 3046 // 3047 // If this exception specification cannot be known yet (for instance, 3048 // because this is the exception specification for a defaulted default 3049 // constructor and we haven't finished parsing the deferred parts of the 3050 // class yet), the C++0x standard does not specify how to behave. We 3051 // record this as an 'unknown' exception specification, which overrules 3052 // any other specification (even 'none', to keep this rule simple). 3053 ExceptionSpecificationType ComputedEST; 3054 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 3055 SmallVector<QualType, 4> Exceptions; 3056 3057 void ClearExceptions() { 3058 ExceptionsSeen.clear(); 3059 Exceptions.clear(); 3060 } 3061 3062 public: 3063 explicit ImplicitExceptionSpecification(ASTContext &Context) 3064 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 3065 if (!Context.getLangOpts().CPlusPlus0x) 3066 ComputedEST = EST_DynamicNone; 3067 } 3068 3069 /// \brief Get the computed exception specification type. 3070 ExceptionSpecificationType getExceptionSpecType() const { 3071 assert(ComputedEST != EST_ComputedNoexcept && 3072 "noexcept(expr) should not be a possible result"); 3073 return ComputedEST; 3074 } 3075 3076 /// \brief The number of exceptions in the exception specification. 3077 unsigned size() const { return Exceptions.size(); } 3078 3079 /// \brief The set of exceptions in the exception specification. 3080 const QualType *data() const { return Exceptions.data(); } 3081 3082 /// \brief Integrate another called method into the collected data. 3083 void CalledDecl(CXXMethodDecl *Method); 3084 3085 /// \brief Integrate an invoked expression into the collected data. 3086 void CalledExpr(Expr *E); 3087 3088 /// \brief Specify that the exception specification can't be detemined yet. 3089 void SetDelayed() { 3090 ClearExceptions(); 3091 ComputedEST = EST_Delayed; 3092 } 3093 3094 FunctionProtoType::ExtProtoInfo getEPI() const { 3095 FunctionProtoType::ExtProtoInfo EPI; 3096 EPI.ExceptionSpecType = getExceptionSpecType(); 3097 EPI.NumExceptions = size(); 3098 EPI.Exceptions = data(); 3099 return EPI; 3100 } 3101 }; 3102 3103 /// \brief Determine what sort of exception specification a defaulted 3104 /// copy constructor of a class will have. 3105 ImplicitExceptionSpecification 3106 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3107 3108 /// \brief Determine what sort of exception specification a defaulted 3109 /// default constructor of a class will have, and whether the parameter 3110 /// will be const. 3111 std::pair<ImplicitExceptionSpecification, bool> 3112 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3113 3114 /// \brief Determine what sort of exception specification a defautled 3115 /// copy assignment operator of a class will have, and whether the 3116 /// parameter will be const. 3117 std::pair<ImplicitExceptionSpecification, bool> 3118 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3119 3120 /// \brief Determine what sort of exception specification a defaulted move 3121 /// constructor of a class will have. 3122 ImplicitExceptionSpecification 3123 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3124 3125 /// \brief Determine what sort of exception specification a defaulted move 3126 /// assignment operator of a class will have. 3127 ImplicitExceptionSpecification 3128 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3129 3130 /// \brief Determine what sort of exception specification a defaulted 3131 /// destructor of a class will have. 3132 ImplicitExceptionSpecification 3133 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3134 3135 /// \brief Determine if a special member function should have a deleted 3136 /// definition when it is defaulted. 3137 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM, 3138 bool Diagnose = false); 3139 3140 /// \brief Declare the implicit default constructor for the given class. 3141 /// 3142 /// \param ClassDecl The class declaration into which the implicit 3143 /// default constructor will be added. 3144 /// 3145 /// \returns The implicitly-declared default constructor. 3146 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3147 CXXRecordDecl *ClassDecl); 3148 3149 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3150 /// defining this constructor as the default constructor. 3151 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3152 CXXConstructorDecl *Constructor); 3153 3154 /// \brief Declare the implicit destructor for the given class. 3155 /// 3156 /// \param ClassDecl The class declaration into which the implicit 3157 /// destructor will be added. 3158 /// 3159 /// \returns The implicitly-declared destructor. 3160 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3161 3162 /// DefineImplicitDestructor - Checks for feasibility of 3163 /// defining this destructor as the default destructor. 3164 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3165 CXXDestructorDecl *Destructor); 3166 3167 /// \brief Build an exception spec for destructors that don't have one. 3168 /// 3169 /// C++11 says that user-defined destructors with no exception spec get one 3170 /// that looks as if the destructor was implicitly declared. 3171 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3172 CXXDestructorDecl *Destructor); 3173 3174 /// \brief Declare all inherited constructors for the given class. 3175 /// 3176 /// \param ClassDecl The class declaration into which the inherited 3177 /// constructors will be added. 3178 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3179 3180 /// \brief Declare the implicit copy constructor for the given class. 3181 /// 3182 /// \param ClassDecl The class declaration into which the implicit 3183 /// copy constructor will be added. 3184 /// 3185 /// \returns The implicitly-declared copy constructor. 3186 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3187 3188 /// DefineImplicitCopyConstructor - Checks for feasibility of 3189 /// defining this constructor as the copy constructor. 3190 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3191 CXXConstructorDecl *Constructor); 3192 3193 /// \brief Declare the implicit move constructor for the given class. 3194 /// 3195 /// \param ClassDecl The Class declaration into which the implicit 3196 /// move constructor will be added. 3197 /// 3198 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3199 /// declared. 3200 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3201 3202 /// DefineImplicitMoveConstructor - Checks for feasibility of 3203 /// defining this constructor as the move constructor. 3204 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3205 CXXConstructorDecl *Constructor); 3206 3207 /// \brief Declare the implicit copy assignment operator for the given class. 3208 /// 3209 /// \param ClassDecl The class declaration into which the implicit 3210 /// copy assignment operator will be added. 3211 /// 3212 /// \returns The implicitly-declared copy assignment operator. 3213 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3214 3215 /// \brief Defines an implicitly-declared copy assignment operator. 3216 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3217 CXXMethodDecl *MethodDecl); 3218 3219 /// \brief Declare the implicit move assignment operator for the given class. 3220 /// 3221 /// \param ClassDecl The Class declaration into which the implicit 3222 /// move assignment operator will be added. 3223 /// 3224 /// \returns The implicitly-declared move assignment operator, or NULL if it 3225 /// wasn't declared. 3226 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3227 3228 /// \brief Defines an implicitly-declared move assignment operator. 3229 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3230 CXXMethodDecl *MethodDecl); 3231 3232 /// \brief Force the declaration of any implicitly-declared members of this 3233 /// class. 3234 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3235 3236 /// \brief Determine whether the given function is an implicitly-deleted 3237 /// special member function. 3238 bool isImplicitlyDeleted(FunctionDecl *FD); 3239 3240 /// MaybeBindToTemporary - If the passed in expression has a record type with 3241 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3242 /// it simply returns the passed in expression. 3243 ExprResult MaybeBindToTemporary(Expr *E); 3244 3245 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3246 MultiExprArg ArgsPtr, 3247 SourceLocation Loc, 3248 ASTOwningVector<Expr*> &ConvertedArgs, 3249 bool AllowExplicit = false); 3250 3251 ParsedType getDestructorName(SourceLocation TildeLoc, 3252 IdentifierInfo &II, SourceLocation NameLoc, 3253 Scope *S, CXXScopeSpec &SS, 3254 ParsedType ObjectType, 3255 bool EnteringContext); 3256 3257 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3258 3259 // Checks that reinterpret casts don't have undefined behavior. 3260 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3261 bool IsDereference, SourceRange Range); 3262 3263 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3264 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3265 tok::TokenKind Kind, 3266 SourceLocation LAngleBracketLoc, 3267 Declarator &D, 3268 SourceLocation RAngleBracketLoc, 3269 SourceLocation LParenLoc, 3270 Expr *E, 3271 SourceLocation RParenLoc); 3272 3273 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3274 tok::TokenKind Kind, 3275 TypeSourceInfo *Ty, 3276 Expr *E, 3277 SourceRange AngleBrackets, 3278 SourceRange Parens); 3279 3280 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3281 SourceLocation TypeidLoc, 3282 TypeSourceInfo *Operand, 3283 SourceLocation RParenLoc); 3284 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3285 SourceLocation TypeidLoc, 3286 Expr *Operand, 3287 SourceLocation RParenLoc); 3288 3289 /// ActOnCXXTypeid - Parse typeid( something ). 3290 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3291 SourceLocation LParenLoc, bool isType, 3292 void *TyOrExpr, 3293 SourceLocation RParenLoc); 3294 3295 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3296 SourceLocation TypeidLoc, 3297 TypeSourceInfo *Operand, 3298 SourceLocation RParenLoc); 3299 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3300 SourceLocation TypeidLoc, 3301 Expr *Operand, 3302 SourceLocation RParenLoc); 3303 3304 /// ActOnCXXUuidof - Parse __uuidof( something ). 3305 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3306 SourceLocation LParenLoc, bool isType, 3307 void *TyOrExpr, 3308 SourceLocation RParenLoc); 3309 3310 3311 //// ActOnCXXThis - Parse 'this' pointer. 3312 ExprResult ActOnCXXThis(SourceLocation loc); 3313 3314 /// \brief Try to retrieve the type of the 'this' pointer. 3315 /// 3316 /// \param Capture If true, capture 'this' in this context. 3317 /// 3318 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3319 QualType getCurrentThisType(); 3320 3321 /// \brief Make sure the value of 'this' is actually available in the current 3322 /// context, if it is a potentially evaluated context. 3323 /// 3324 /// \param Loc The location at which the capture of 'this' occurs. 3325 /// 3326 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3327 /// capture list. 3328 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3329 3330 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3331 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3332 3333 3334 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. 3335 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3336 3337 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3338 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3339 3340 //// ActOnCXXThrow - Parse throw expressions. 3341 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3342 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3343 bool IsThrownVarInScope); 3344 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3345 bool IsThrownVarInScope); 3346 3347 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3348 /// Can be interpreted either as function-style casting ("int(x)") 3349 /// or class type construction ("ClassType(x,y,z)") 3350 /// or creation of a value-initialized type ("int()"). 3351 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3352 SourceLocation LParenLoc, 3353 MultiExprArg Exprs, 3354 SourceLocation RParenLoc); 3355 3356 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3357 SourceLocation LParenLoc, 3358 MultiExprArg Exprs, 3359 SourceLocation RParenLoc); 3360 3361 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3362 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3363 SourceLocation PlacementLParen, 3364 MultiExprArg PlacementArgs, 3365 SourceLocation PlacementRParen, 3366 SourceRange TypeIdParens, Declarator &D, 3367 Expr *Initializer); 3368 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3369 SourceLocation PlacementLParen, 3370 MultiExprArg PlacementArgs, 3371 SourceLocation PlacementRParen, 3372 SourceRange TypeIdParens, 3373 QualType AllocType, 3374 TypeSourceInfo *AllocTypeInfo, 3375 Expr *ArraySize, 3376 SourceRange DirectInitRange, 3377 Expr *Initializer, 3378 bool TypeMayContainAuto = true); 3379 3380 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3381 SourceRange R); 3382 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3383 bool UseGlobal, QualType AllocType, bool IsArray, 3384 Expr **PlaceArgs, unsigned NumPlaceArgs, 3385 FunctionDecl *&OperatorNew, 3386 FunctionDecl *&OperatorDelete); 3387 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3388 DeclarationName Name, Expr** Args, 3389 unsigned NumArgs, DeclContext *Ctx, 3390 bool AllowMissing, FunctionDecl *&Operator, 3391 bool Diagnose = true); 3392 void DeclareGlobalNewDelete(); 3393 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3394 QualType Argument, 3395 bool addMallocAttr = false); 3396 3397 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3398 DeclarationName Name, FunctionDecl* &Operator, 3399 bool Diagnose = true); 3400 3401 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3402 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3403 bool UseGlobal, bool ArrayForm, 3404 Expr *Operand); 3405 3406 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3407 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3408 SourceLocation StmtLoc, 3409 bool ConvertToBoolean); 3410 3411 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3412 Expr *Operand, SourceLocation RParen); 3413 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3414 SourceLocation RParen); 3415 3416 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3417 /// pseudo-functions. 3418 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3419 SourceLocation KWLoc, 3420 ParsedType Ty, 3421 SourceLocation RParen); 3422 3423 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3424 SourceLocation KWLoc, 3425 TypeSourceInfo *T, 3426 SourceLocation RParen); 3427 3428 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3429 /// pseudo-functions. 3430 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3431 SourceLocation KWLoc, 3432 ParsedType LhsTy, 3433 ParsedType RhsTy, 3434 SourceLocation RParen); 3435 3436 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3437 SourceLocation KWLoc, 3438 TypeSourceInfo *LhsT, 3439 TypeSourceInfo *RhsT, 3440 SourceLocation RParen); 3441 3442 /// \brief Parsed one of the type trait support pseudo-functions. 3443 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3444 ArrayRef<ParsedType> Args, 3445 SourceLocation RParenLoc); 3446 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3447 ArrayRef<TypeSourceInfo *> Args, 3448 SourceLocation RParenLoc); 3449 3450 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3451 /// pseudo-functions. 3452 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3453 SourceLocation KWLoc, 3454 ParsedType LhsTy, 3455 Expr *DimExpr, 3456 SourceLocation RParen); 3457 3458 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3459 SourceLocation KWLoc, 3460 TypeSourceInfo *TSInfo, 3461 Expr *DimExpr, 3462 SourceLocation RParen); 3463 3464 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3465 /// pseudo-functions. 3466 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3467 SourceLocation KWLoc, 3468 Expr *Queried, 3469 SourceLocation RParen); 3470 3471 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3472 SourceLocation KWLoc, 3473 Expr *Queried, 3474 SourceLocation RParen); 3475 3476 ExprResult ActOnStartCXXMemberReference(Scope *S, 3477 Expr *Base, 3478 SourceLocation OpLoc, 3479 tok::TokenKind OpKind, 3480 ParsedType &ObjectType, 3481 bool &MayBePseudoDestructor); 3482 3483 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3484 3485 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3486 SourceLocation OpLoc, 3487 tok::TokenKind OpKind, 3488 const CXXScopeSpec &SS, 3489 TypeSourceInfo *ScopeType, 3490 SourceLocation CCLoc, 3491 SourceLocation TildeLoc, 3492 PseudoDestructorTypeStorage DestroyedType, 3493 bool HasTrailingLParen); 3494 3495 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3496 SourceLocation OpLoc, 3497 tok::TokenKind OpKind, 3498 CXXScopeSpec &SS, 3499 UnqualifiedId &FirstTypeName, 3500 SourceLocation CCLoc, 3501 SourceLocation TildeLoc, 3502 UnqualifiedId &SecondTypeName, 3503 bool HasTrailingLParen); 3504 3505 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3506 SourceLocation OpLoc, 3507 tok::TokenKind OpKind, 3508 SourceLocation TildeLoc, 3509 const DeclSpec& DS, 3510 bool HasTrailingLParen); 3511 3512 /// MaybeCreateExprWithCleanups - If the current full-expression 3513 /// requires any cleanups, surround it with a ExprWithCleanups node. 3514 /// Otherwise, just returns the passed-in expression. 3515 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3516 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3517 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3518 3519 ExprResult ActOnFinishFullExpr(Expr *Expr); 3520 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3521 3522 // Marks SS invalid if it represents an incomplete type. 3523 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3524 3525 DeclContext *computeDeclContext(QualType T); 3526 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3527 bool EnteringContext = false); 3528 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3529 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3530 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3531 3532 /// \brief The parser has parsed a global nested-name-specifier '::'. 3533 /// 3534 /// \param S The scope in which this nested-name-specifier occurs. 3535 /// 3536 /// \param CCLoc The location of the '::'. 3537 /// 3538 /// \param SS The nested-name-specifier, which will be updated in-place 3539 /// to reflect the parsed nested-name-specifier. 3540 /// 3541 /// \returns true if an error occurred, false otherwise. 3542 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3543 CXXScopeSpec &SS); 3544 3545 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3546 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3547 3548 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3549 SourceLocation IdLoc, 3550 IdentifierInfo &II, 3551 ParsedType ObjectType); 3552 3553 bool BuildCXXNestedNameSpecifier(Scope *S, 3554 IdentifierInfo &Identifier, 3555 SourceLocation IdentifierLoc, 3556 SourceLocation CCLoc, 3557 QualType ObjectType, 3558 bool EnteringContext, 3559 CXXScopeSpec &SS, 3560 NamedDecl *ScopeLookupResult, 3561 bool ErrorRecoveryLookup); 3562 3563 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3564 /// 3565 /// \param S The scope in which this nested-name-specifier occurs. 3566 /// 3567 /// \param Identifier The identifier preceding the '::'. 3568 /// 3569 /// \param IdentifierLoc The location of the identifier. 3570 /// 3571 /// \param CCLoc The location of the '::'. 3572 /// 3573 /// \param ObjectType The type of the object, if we're parsing 3574 /// nested-name-specifier in a member access expression. 3575 /// 3576 /// \param EnteringContext Whether we're entering the context nominated by 3577 /// this nested-name-specifier. 3578 /// 3579 /// \param SS The nested-name-specifier, which is both an input 3580 /// parameter (the nested-name-specifier before this type) and an 3581 /// output parameter (containing the full nested-name-specifier, 3582 /// including this new type). 3583 /// 3584 /// \returns true if an error occurred, false otherwise. 3585 bool ActOnCXXNestedNameSpecifier(Scope *S, 3586 IdentifierInfo &Identifier, 3587 SourceLocation IdentifierLoc, 3588 SourceLocation CCLoc, 3589 ParsedType ObjectType, 3590 bool EnteringContext, 3591 CXXScopeSpec &SS); 3592 3593 ExprResult ActOnDecltypeExpression(Expr *E); 3594 3595 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3596 const DeclSpec &DS, 3597 SourceLocation ColonColonLoc); 3598 3599 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3600 IdentifierInfo &Identifier, 3601 SourceLocation IdentifierLoc, 3602 SourceLocation ColonLoc, 3603 ParsedType ObjectType, 3604 bool EnteringContext); 3605 3606 /// \brief The parser has parsed a nested-name-specifier 3607 /// 'template[opt] template-name < template-args >::'. 3608 /// 3609 /// \param S The scope in which this nested-name-specifier occurs. 3610 /// 3611 /// \param SS The nested-name-specifier, which is both an input 3612 /// parameter (the nested-name-specifier before this type) and an 3613 /// output parameter (containing the full nested-name-specifier, 3614 /// including this new type). 3615 /// 3616 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3617 /// \param TemplateName The template name. 3618 /// \param TemplateNameLoc The location of the template name. 3619 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3620 /// \param TemplateArgs The template arguments. 3621 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3622 /// \param CCLoc The location of the '::'. 3623 /// 3624 /// \param EnteringContext Whether we're entering the context of the 3625 /// nested-name-specifier. 3626 /// 3627 /// 3628 /// \returns true if an error occurred, false otherwise. 3629 bool ActOnCXXNestedNameSpecifier(Scope *S, 3630 CXXScopeSpec &SS, 3631 SourceLocation TemplateKWLoc, 3632 TemplateTy Template, 3633 SourceLocation TemplateNameLoc, 3634 SourceLocation LAngleLoc, 3635 ASTTemplateArgsPtr TemplateArgs, 3636 SourceLocation RAngleLoc, 3637 SourceLocation CCLoc, 3638 bool EnteringContext); 3639 3640 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3641 /// that the parser can use later to reconstruct the given 3642 /// nested-name-specifier. 3643 /// 3644 /// \param SS A nested-name-specifier. 3645 /// 3646 /// \returns A pointer containing all of the information in the 3647 /// nested-name-specifier \p SS. 3648 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3649 3650 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3651 /// the nested-name-specifier structure. 3652 /// 3653 /// \param Annotation The annotation pointer, produced by 3654 /// \c SaveNestedNameSpecifierAnnotation(). 3655 /// 3656 /// \param AnnotationRange The source range corresponding to the annotation. 3657 /// 3658 /// \param SS The nested-name-specifier that will be updated with the contents 3659 /// of the annotation pointer. 3660 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3661 SourceRange AnnotationRange, 3662 CXXScopeSpec &SS); 3663 3664 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3665 3666 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3667 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3668 /// After this method is called, according to [C++ 3.4.3p3], names should be 3669 /// looked up in the declarator-id's scope, until the declarator is parsed and 3670 /// ActOnCXXExitDeclaratorScope is called. 3671 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3672 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3673 3674 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3675 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3676 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3677 /// Used to indicate that names should revert to being looked up in the 3678 /// defining scope. 3679 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3680 3681 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3682 /// initializer for the declaration 'Dcl'. 3683 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3684 /// static data member of class X, names should be looked up in the scope of 3685 /// class X. 3686 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3687 3688 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3689 /// initializer for the declaration 'Dcl'. 3690 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3691 3692 /// \brief Create a new lambda closure type. 3693 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3694 bool KnownDependent = false); 3695 3696 /// \brief Start the definition of a lambda expression. 3697 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3698 SourceRange IntroducerRange, 3699 TypeSourceInfo *MethodType, 3700 SourceLocation EndLoc, 3701 llvm::ArrayRef<ParmVarDecl *> Params); 3702 3703 /// \brief Introduce the scope for a lambda expression. 3704 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3705 SourceRange IntroducerRange, 3706 LambdaCaptureDefault CaptureDefault, 3707 bool ExplicitParams, 3708 bool ExplicitResultType, 3709 bool Mutable); 3710 3711 /// \brief Note that we have finished the explicit captures for the 3712 /// given lambda. 3713 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3714 3715 /// \brief Introduce the lambda parameters into scope. 3716 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3717 3718 /// ActOnStartOfLambdaDefinition - This is called just before we start 3719 /// parsing the body of a lambda; it analyzes the explicit captures and 3720 /// arguments, and sets up various data-structures for the body of the 3721 /// lambda. 3722 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3723 Declarator &ParamInfo, Scope *CurScope); 3724 3725 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3726 /// is invoked to pop the information about the lambda. 3727 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3728 bool IsInstantiation = false); 3729 3730 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3731 /// was successfully completed. 3732 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3733 Scope *CurScope, 3734 llvm::Optional<unsigned> ManglingNumber 3735 = llvm::Optional<unsigned>(), 3736 Decl *ContextDecl = 0, 3737 bool IsInstantiation = false); 3738 3739 /// \brief Define the "body" of the conversion from a lambda object to a 3740 /// function pointer. 3741 /// 3742 /// This routine doesn't actually define a sensible body; rather, it fills 3743 /// in the initialization expression needed to copy the lambda object into 3744 /// the block, and IR generation actually generates the real body of the 3745 /// block pointer conversion. 3746 void DefineImplicitLambdaToFunctionPointerConversion( 3747 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3748 3749 /// \brief Define the "body" of the conversion from a lambda object to a 3750 /// block pointer. 3751 /// 3752 /// This routine doesn't actually define a sensible body; rather, it fills 3753 /// in the initialization expression needed to copy the lambda object into 3754 /// the block, and IR generation actually generates the real body of the 3755 /// block pointer conversion. 3756 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3757 CXXConversionDecl *Conv); 3758 3759 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation, 3760 SourceLocation ConvLocation, 3761 CXXConversionDecl *Conv, 3762 Expr *Src); 3763 3764 // ParseObjCStringLiteral - Parse Objective-C string literals. 3765 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3766 Expr **Strings, 3767 unsigned NumStrings); 3768 3769 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S); 3770 3771 /// BuildObjCNumericLiteral - builds an ObjCNumericLiteral AST node for the 3772 /// numeric literal expression. Type of the expression will be "NSNumber *" 3773 /// or "id" if NSNumber is unavailable. 3774 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number); 3775 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc, 3776 bool Value); 3777 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements); 3778 3779 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr, 3780 Expr *IndexExpr, 3781 ObjCMethodDecl *getterMethod, 3782 ObjCMethodDecl *setterMethod); 3783 3784 ExprResult BuildObjCDictionaryLiteral(SourceRange SR, 3785 ObjCDictionaryElement *Elements, 3786 unsigned NumElements); 3787 3788 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3789 TypeSourceInfo *EncodedTypeInfo, 3790 SourceLocation RParenLoc); 3791 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3792 CXXConversionDecl *Method, 3793 bool HadMultipleCandidates); 3794 3795 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3796 SourceLocation EncodeLoc, 3797 SourceLocation LParenLoc, 3798 ParsedType Ty, 3799 SourceLocation RParenLoc); 3800 3801 // ParseObjCSelectorExpression - Build selector expression for @selector 3802 ExprResult ParseObjCSelectorExpression(Selector Sel, 3803 SourceLocation AtLoc, 3804 SourceLocation SelLoc, 3805 SourceLocation LParenLoc, 3806 SourceLocation RParenLoc); 3807 3808 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3809 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3810 SourceLocation AtLoc, 3811 SourceLocation ProtoLoc, 3812 SourceLocation LParenLoc, 3813 SourceLocation RParenLoc); 3814 3815 //===--------------------------------------------------------------------===// 3816 // C++ Declarations 3817 // 3818 Decl *ActOnStartLinkageSpecification(Scope *S, 3819 SourceLocation ExternLoc, 3820 SourceLocation LangLoc, 3821 StringRef Lang, 3822 SourceLocation LBraceLoc); 3823 Decl *ActOnFinishLinkageSpecification(Scope *S, 3824 Decl *LinkageSpec, 3825 SourceLocation RBraceLoc); 3826 3827 3828 //===--------------------------------------------------------------------===// 3829 // C++ Classes 3830 // 3831 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3832 const CXXScopeSpec *SS = 0); 3833 3834 bool ActOnAccessSpecifier(AccessSpecifier Access, 3835 SourceLocation ASLoc, 3836 SourceLocation ColonLoc, 3837 AttributeList *Attrs = 0); 3838 3839 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3840 Declarator &D, 3841 MultiTemplateParamsArg TemplateParameterLists, 3842 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3843 bool HasDeferredInit); 3844 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3845 Expr *Init); 3846 3847 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3848 Scope *S, 3849 CXXScopeSpec &SS, 3850 IdentifierInfo *MemberOrBase, 3851 ParsedType TemplateTypeTy, 3852 const DeclSpec &DS, 3853 SourceLocation IdLoc, 3854 SourceLocation LParenLoc, 3855 Expr **Args, unsigned NumArgs, 3856 SourceLocation RParenLoc, 3857 SourceLocation EllipsisLoc); 3858 3859 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3860 Scope *S, 3861 CXXScopeSpec &SS, 3862 IdentifierInfo *MemberOrBase, 3863 ParsedType TemplateTypeTy, 3864 const DeclSpec &DS, 3865 SourceLocation IdLoc, 3866 Expr *InitList, 3867 SourceLocation EllipsisLoc); 3868 3869 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3870 Scope *S, 3871 CXXScopeSpec &SS, 3872 IdentifierInfo *MemberOrBase, 3873 ParsedType TemplateTypeTy, 3874 const DeclSpec &DS, 3875 SourceLocation IdLoc, 3876 Expr *Init, 3877 SourceLocation EllipsisLoc); 3878 3879 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3880 Expr *Init, 3881 SourceLocation IdLoc); 3882 3883 MemInitResult BuildBaseInitializer(QualType BaseType, 3884 TypeSourceInfo *BaseTInfo, 3885 Expr *Init, 3886 CXXRecordDecl *ClassDecl, 3887 SourceLocation EllipsisLoc); 3888 3889 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3890 Expr *Init, 3891 CXXRecordDecl *ClassDecl); 3892 3893 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3894 CXXCtorInitializer *Initializer); 3895 3896 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3897 CXXCtorInitializer **Initializers, 3898 unsigned NumInitializers, bool AnyErrors); 3899 3900 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3901 3902 3903 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3904 /// mark all the non-trivial destructors of its members and bases as 3905 /// referenced. 3906 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3907 CXXRecordDecl *Record); 3908 3909 /// \brief The list of classes whose vtables have been used within 3910 /// this translation unit, and the source locations at which the 3911 /// first use occurred. 3912 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3913 3914 /// \brief The list of vtables that are required but have not yet been 3915 /// materialized. 3916 SmallVector<VTableUse, 16> VTableUses; 3917 3918 /// \brief The set of classes whose vtables have been used within 3919 /// this translation unit, and a bit that will be true if the vtable is 3920 /// required to be emitted (otherwise, it should be emitted only if needed 3921 /// by code generation). 3922 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3923 3924 /// \brief Load any externally-stored vtable uses. 3925 void LoadExternalVTableUses(); 3926 3927 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3928 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3929 DynamicClassesType; 3930 3931 /// \brief A list of all of the dynamic classes in this translation 3932 /// unit. 3933 DynamicClassesType DynamicClasses; 3934 3935 /// \brief Note that the vtable for the given class was used at the 3936 /// given location. 3937 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3938 bool DefinitionRequired = false); 3939 3940 /// MarkVirtualMembersReferenced - Will mark all members of the given 3941 /// CXXRecordDecl referenced. 3942 void MarkVirtualMembersReferenced(SourceLocation Loc, 3943 const CXXRecordDecl *RD); 3944 3945 /// \brief Define all of the vtables that have been used in this 3946 /// translation unit and reference any virtual members used by those 3947 /// vtables. 3948 /// 3949 /// \returns true if any work was done, false otherwise. 3950 bool DefineUsedVTables(); 3951 3952 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3953 3954 void ActOnMemInitializers(Decl *ConstructorDecl, 3955 SourceLocation ColonLoc, 3956 CXXCtorInitializer **MemInits, 3957 unsigned NumMemInits, 3958 bool AnyErrors); 3959 3960 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3961 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3962 Decl *TagDecl, 3963 SourceLocation LBrac, 3964 SourceLocation RBrac, 3965 AttributeList *AttrList); 3966 3967 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3968 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3969 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3970 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3971 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3972 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3973 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3974 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3975 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3976 bool IsInsideALocalClassWithinATemplateFunction(); 3977 3978 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3979 Expr *AssertExpr, 3980 Expr *AssertMessageExpr, 3981 SourceLocation RParenLoc); 3982 3983 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3984 SourceLocation FriendLoc, 3985 TypeSourceInfo *TSInfo); 3986 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3987 MultiTemplateParamsArg TemplateParams); 3988 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3989 MultiTemplateParamsArg TemplateParams); 3990 3991 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3992 StorageClass& SC); 3993 void CheckConstructor(CXXConstructorDecl *Constructor); 3994 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3995 StorageClass& SC); 3996 bool CheckDestructor(CXXDestructorDecl *Destructor); 3997 void CheckConversionDeclarator(Declarator &D, QualType &R, 3998 StorageClass& SC); 3999 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 4000 4001 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 4002 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 4003 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 4004 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 4005 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 4006 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 4007 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 4008 4009 //===--------------------------------------------------------------------===// 4010 // C++ Derived Classes 4011 // 4012 4013 /// ActOnBaseSpecifier - Parsed a base specifier 4014 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 4015 SourceRange SpecifierRange, 4016 bool Virtual, AccessSpecifier Access, 4017 TypeSourceInfo *TInfo, 4018 SourceLocation EllipsisLoc); 4019 4020 BaseResult ActOnBaseSpecifier(Decl *classdecl, 4021 SourceRange SpecifierRange, 4022 bool Virtual, AccessSpecifier Access, 4023 ParsedType basetype, 4024 SourceLocation BaseLoc, 4025 SourceLocation EllipsisLoc); 4026 4027 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 4028 unsigned NumBases); 4029 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 4030 unsigned NumBases); 4031 4032 bool IsDerivedFrom(QualType Derived, QualType Base); 4033 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 4034 4035 // FIXME: I don't like this name. 4036 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 4037 4038 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 4039 4040 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4041 SourceLocation Loc, SourceRange Range, 4042 CXXCastPath *BasePath = 0, 4043 bool IgnoreAccess = false); 4044 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 4045 unsigned InaccessibleBaseID, 4046 unsigned AmbigiousBaseConvID, 4047 SourceLocation Loc, SourceRange Range, 4048 DeclarationName Name, 4049 CXXCastPath *BasePath); 4050 4051 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 4052 4053 /// CheckOverridingFunctionReturnType - Checks whether the return types are 4054 /// covariant, according to C++ [class.virtual]p5. 4055 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 4056 const CXXMethodDecl *Old); 4057 4058 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 4059 /// spec is a subset of base spec. 4060 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 4061 const CXXMethodDecl *Old); 4062 4063 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 4064 4065 /// CheckOverrideControl - Check C++0x override control semantics. 4066 void CheckOverrideControl(const Decl *D); 4067 4068 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 4069 /// overrides a virtual member function marked 'final', according to 4070 /// C++0x [class.virtual]p3. 4071 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 4072 const CXXMethodDecl *Old); 4073 4074 4075 //===--------------------------------------------------------------------===// 4076 // C++ Access Control 4077 // 4078 4079 enum AccessResult { 4080 AR_accessible, 4081 AR_inaccessible, 4082 AR_dependent, 4083 AR_delayed 4084 }; 4085 4086 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 4087 NamedDecl *PrevMemberDecl, 4088 AccessSpecifier LexicalAS); 4089 4090 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 4091 DeclAccessPair FoundDecl); 4092 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 4093 DeclAccessPair FoundDecl); 4094 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 4095 SourceRange PlacementRange, 4096 CXXRecordDecl *NamingClass, 4097 DeclAccessPair FoundDecl, 4098 bool Diagnose = true); 4099 AccessResult CheckConstructorAccess(SourceLocation Loc, 4100 CXXConstructorDecl *D, 4101 const InitializedEntity &Entity, 4102 AccessSpecifier Access, 4103 bool IsCopyBindingRefToTemp = false); 4104 AccessResult CheckConstructorAccess(SourceLocation Loc, 4105 CXXConstructorDecl *D, 4106 AccessSpecifier Access, 4107 PartialDiagnostic PD); 4108 AccessResult CheckDestructorAccess(SourceLocation Loc, 4109 CXXDestructorDecl *Dtor, 4110 const PartialDiagnostic &PDiag); 4111 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 4112 NamedDecl *D, 4113 const PartialDiagnostic &PDiag); 4114 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 4115 Expr *ObjectExpr, 4116 Expr *ArgExpr, 4117 DeclAccessPair FoundDecl); 4118 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 4119 DeclAccessPair FoundDecl); 4120 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 4121 QualType Base, QualType Derived, 4122 const CXXBasePath &Path, 4123 unsigned DiagID, 4124 bool ForceCheck = false, 4125 bool ForceUnprivileged = false); 4126 void CheckLookupAccess(const LookupResult &R); 4127 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 4128 4129 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 4130 const MultiLevelTemplateArgumentList &TemplateArgs); 4131 void PerformDependentDiagnostics(const DeclContext *Pattern, 4132 const MultiLevelTemplateArgumentList &TemplateArgs); 4133 4134 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4135 4136 /// A flag to suppress access checking. 4137 bool SuppressAccessChecking; 4138 4139 /// \brief When true, access checking violations are treated as SFINAE 4140 /// failures rather than hard errors. 4141 bool AccessCheckingSFINAE; 4142 4143 /// \brief RAII object used to temporarily suppress access checking. 4144 class SuppressAccessChecksRAII { 4145 Sema &S; 4146 bool SuppressingAccess; 4147 4148 public: 4149 SuppressAccessChecksRAII(Sema &S, bool Suppress) 4150 : S(S), SuppressingAccess(Suppress) { 4151 if (Suppress) S.ActOnStartSuppressingAccessChecks(); 4152 } 4153 ~SuppressAccessChecksRAII() { 4154 done(); 4155 } 4156 void done() { 4157 if (!SuppressingAccess) return; 4158 S.ActOnStopSuppressingAccessChecks(); 4159 SuppressingAccess = false; 4160 } 4161 }; 4162 4163 void ActOnStartSuppressingAccessChecks(); 4164 void ActOnStopSuppressingAccessChecks(); 4165 4166 enum AbstractDiagSelID { 4167 AbstractNone = -1, 4168 AbstractReturnType, 4169 AbstractParamType, 4170 AbstractVariableType, 4171 AbstractFieldType, 4172 AbstractArrayType 4173 }; 4174 4175 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4176 const PartialDiagnostic &PD); 4177 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4178 4179 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4180 AbstractDiagSelID SelID = AbstractNone); 4181 4182 //===--------------------------------------------------------------------===// 4183 // C++ Overloaded Operators [C++ 13.5] 4184 // 4185 4186 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4187 4188 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4189 4190 //===--------------------------------------------------------------------===// 4191 // C++ Templates [C++ 14] 4192 // 4193 void FilterAcceptableTemplateNames(LookupResult &R, 4194 bool AllowFunctionTemplates = true); 4195 bool hasAnyAcceptableTemplateNames(LookupResult &R, 4196 bool AllowFunctionTemplates = true); 4197 4198 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4199 QualType ObjectType, bool EnteringContext, 4200 bool &MemberOfUnknownSpecialization); 4201 4202 TemplateNameKind isTemplateName(Scope *S, 4203 CXXScopeSpec &SS, 4204 bool hasTemplateKeyword, 4205 UnqualifiedId &Name, 4206 ParsedType ObjectType, 4207 bool EnteringContext, 4208 TemplateTy &Template, 4209 bool &MemberOfUnknownSpecialization); 4210 4211 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4212 SourceLocation IILoc, 4213 Scope *S, 4214 const CXXScopeSpec *SS, 4215 TemplateTy &SuggestedTemplate, 4216 TemplateNameKind &SuggestedKind); 4217 4218 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4219 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4220 4221 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4222 SourceLocation EllipsisLoc, 4223 SourceLocation KeyLoc, 4224 IdentifierInfo *ParamName, 4225 SourceLocation ParamNameLoc, 4226 unsigned Depth, unsigned Position, 4227 SourceLocation EqualLoc, 4228 ParsedType DefaultArg); 4229 4230 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4231 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4232 unsigned Depth, 4233 unsigned Position, 4234 SourceLocation EqualLoc, 4235 Expr *DefaultArg); 4236 Decl *ActOnTemplateTemplateParameter(Scope *S, 4237 SourceLocation TmpLoc, 4238 TemplateParameterList *Params, 4239 SourceLocation EllipsisLoc, 4240 IdentifierInfo *ParamName, 4241 SourceLocation ParamNameLoc, 4242 unsigned Depth, 4243 unsigned Position, 4244 SourceLocation EqualLoc, 4245 ParsedTemplateArgument DefaultArg); 4246 4247 TemplateParameterList * 4248 ActOnTemplateParameterList(unsigned Depth, 4249 SourceLocation ExportLoc, 4250 SourceLocation TemplateLoc, 4251 SourceLocation LAngleLoc, 4252 Decl **Params, unsigned NumParams, 4253 SourceLocation RAngleLoc); 4254 4255 /// \brief The context in which we are checking a template parameter 4256 /// list. 4257 enum TemplateParamListContext { 4258 TPC_ClassTemplate, 4259 TPC_FunctionTemplate, 4260 TPC_ClassTemplateMember, 4261 TPC_FriendFunctionTemplate, 4262 TPC_FriendFunctionTemplateDefinition, 4263 TPC_TypeAliasTemplate 4264 }; 4265 4266 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4267 TemplateParameterList *OldParams, 4268 TemplateParamListContext TPC); 4269 TemplateParameterList * 4270 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4271 SourceLocation DeclLoc, 4272 const CXXScopeSpec &SS, 4273 TemplateParameterList **ParamLists, 4274 unsigned NumParamLists, 4275 bool IsFriend, 4276 bool &IsExplicitSpecialization, 4277 bool &Invalid); 4278 4279 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4280 SourceLocation KWLoc, CXXScopeSpec &SS, 4281 IdentifierInfo *Name, SourceLocation NameLoc, 4282 AttributeList *Attr, 4283 TemplateParameterList *TemplateParams, 4284 AccessSpecifier AS, 4285 SourceLocation ModulePrivateLoc, 4286 unsigned NumOuterTemplateParamLists, 4287 TemplateParameterList **OuterTemplateParamLists); 4288 4289 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4290 TemplateArgumentListInfo &Out); 4291 4292 void NoteAllFoundTemplates(TemplateName Name); 4293 4294 QualType CheckTemplateIdType(TemplateName Template, 4295 SourceLocation TemplateLoc, 4296 TemplateArgumentListInfo &TemplateArgs); 4297 4298 TypeResult 4299 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4300 TemplateTy Template, SourceLocation TemplateLoc, 4301 SourceLocation LAngleLoc, 4302 ASTTemplateArgsPtr TemplateArgs, 4303 SourceLocation RAngleLoc, 4304 bool IsCtorOrDtorName = false); 4305 4306 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4307 /// such as \c class T::template apply<U>. 4308 /// 4309 /// \param TUK 4310 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4311 TypeSpecifierType TagSpec, 4312 SourceLocation TagLoc, 4313 CXXScopeSpec &SS, 4314 SourceLocation TemplateKWLoc, 4315 TemplateTy TemplateD, 4316 SourceLocation TemplateLoc, 4317 SourceLocation LAngleLoc, 4318 ASTTemplateArgsPtr TemplateArgsIn, 4319 SourceLocation RAngleLoc); 4320 4321 4322 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4323 SourceLocation TemplateKWLoc, 4324 LookupResult &R, 4325 bool RequiresADL, 4326 const TemplateArgumentListInfo *TemplateArgs); 4327 4328 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4329 SourceLocation TemplateKWLoc, 4330 const DeclarationNameInfo &NameInfo, 4331 const TemplateArgumentListInfo *TemplateArgs); 4332 4333 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4334 CXXScopeSpec &SS, 4335 SourceLocation TemplateKWLoc, 4336 UnqualifiedId &Name, 4337 ParsedType ObjectType, 4338 bool EnteringContext, 4339 TemplateTy &Template); 4340 4341 DeclResult 4342 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4343 SourceLocation KWLoc, 4344 SourceLocation ModulePrivateLoc, 4345 CXXScopeSpec &SS, 4346 TemplateTy Template, 4347 SourceLocation TemplateNameLoc, 4348 SourceLocation LAngleLoc, 4349 ASTTemplateArgsPtr TemplateArgs, 4350 SourceLocation RAngleLoc, 4351 AttributeList *Attr, 4352 MultiTemplateParamsArg TemplateParameterLists); 4353 4354 Decl *ActOnTemplateDeclarator(Scope *S, 4355 MultiTemplateParamsArg TemplateParameterLists, 4356 Declarator &D); 4357 4358 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4359 MultiTemplateParamsArg TemplateParameterLists, 4360 Declarator &D); 4361 4362 bool 4363 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4364 TemplateSpecializationKind NewTSK, 4365 NamedDecl *PrevDecl, 4366 TemplateSpecializationKind PrevTSK, 4367 SourceLocation PrevPtOfInstantiation, 4368 bool &SuppressNew); 4369 4370 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4371 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4372 LookupResult &Previous); 4373 4374 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4375 TemplateArgumentListInfo *ExplicitTemplateArgs, 4376 LookupResult &Previous); 4377 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4378 4379 DeclResult 4380 ActOnExplicitInstantiation(Scope *S, 4381 SourceLocation ExternLoc, 4382 SourceLocation TemplateLoc, 4383 unsigned TagSpec, 4384 SourceLocation KWLoc, 4385 const CXXScopeSpec &SS, 4386 TemplateTy Template, 4387 SourceLocation TemplateNameLoc, 4388 SourceLocation LAngleLoc, 4389 ASTTemplateArgsPtr TemplateArgs, 4390 SourceLocation RAngleLoc, 4391 AttributeList *Attr); 4392 4393 DeclResult 4394 ActOnExplicitInstantiation(Scope *S, 4395 SourceLocation ExternLoc, 4396 SourceLocation TemplateLoc, 4397 unsigned TagSpec, 4398 SourceLocation KWLoc, 4399 CXXScopeSpec &SS, 4400 IdentifierInfo *Name, 4401 SourceLocation NameLoc, 4402 AttributeList *Attr); 4403 4404 DeclResult ActOnExplicitInstantiation(Scope *S, 4405 SourceLocation ExternLoc, 4406 SourceLocation TemplateLoc, 4407 Declarator &D); 4408 4409 TemplateArgumentLoc 4410 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4411 SourceLocation TemplateLoc, 4412 SourceLocation RAngleLoc, 4413 Decl *Param, 4414 SmallVectorImpl<TemplateArgument> &Converted); 4415 4416 /// \brief Specifies the context in which a particular template 4417 /// argument is being checked. 4418 enum CheckTemplateArgumentKind { 4419 /// \brief The template argument was specified in the code or was 4420 /// instantiated with some deduced template arguments. 4421 CTAK_Specified, 4422 4423 /// \brief The template argument was deduced via template argument 4424 /// deduction. 4425 CTAK_Deduced, 4426 4427 /// \brief The template argument was deduced from an array bound 4428 /// via template argument deduction. 4429 CTAK_DeducedFromArrayBound 4430 }; 4431 4432 bool CheckTemplateArgument(NamedDecl *Param, 4433 const TemplateArgumentLoc &Arg, 4434 NamedDecl *Template, 4435 SourceLocation TemplateLoc, 4436 SourceLocation RAngleLoc, 4437 unsigned ArgumentPackIndex, 4438 SmallVectorImpl<TemplateArgument> &Converted, 4439 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4440 4441 /// \brief Check that the given template arguments can be be provided to 4442 /// the given template, converting the arguments along the way. 4443 /// 4444 /// \param Template The template to which the template arguments are being 4445 /// provided. 4446 /// 4447 /// \param TemplateLoc The location of the template name in the source. 4448 /// 4449 /// \param TemplateArgs The list of template arguments. If the template is 4450 /// a template template parameter, this function may extend the set of 4451 /// template arguments to also include substituted, defaulted template 4452 /// arguments. 4453 /// 4454 /// \param PartialTemplateArgs True if the list of template arguments is 4455 /// intentionally partial, e.g., because we're checking just the initial 4456 /// set of template arguments. 4457 /// 4458 /// \param Converted Will receive the converted, canonicalized template 4459 /// arguments. 4460 /// 4461 /// 4462 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4463 /// when the template arguments contain a pack expansion that is being 4464 /// expanded into a fixed parameter list. 4465 /// 4466 /// \returns True if an error occurred, false otherwise. 4467 bool CheckTemplateArgumentList(TemplateDecl *Template, 4468 SourceLocation TemplateLoc, 4469 TemplateArgumentListInfo &TemplateArgs, 4470 bool PartialTemplateArgs, 4471 SmallVectorImpl<TemplateArgument> &Converted, 4472 bool *ExpansionIntoFixedList = 0); 4473 4474 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4475 const TemplateArgumentLoc &Arg, 4476 SmallVectorImpl<TemplateArgument> &Converted); 4477 4478 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4479 TypeSourceInfo *Arg); 4480 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4481 TemplateArgument &Converted); 4482 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4483 QualType InstantiatedParamType, Expr *Arg, 4484 TemplateArgument &Converted, 4485 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4486 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4487 const TemplateArgumentLoc &Arg); 4488 4489 ExprResult 4490 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4491 QualType ParamType, 4492 SourceLocation Loc); 4493 ExprResult 4494 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4495 SourceLocation Loc); 4496 4497 /// \brief Enumeration describing how template parameter lists are compared 4498 /// for equality. 4499 enum TemplateParameterListEqualKind { 4500 /// \brief We are matching the template parameter lists of two templates 4501 /// that might be redeclarations. 4502 /// 4503 /// \code 4504 /// template<typename T> struct X; 4505 /// template<typename T> struct X; 4506 /// \endcode 4507 TPL_TemplateMatch, 4508 4509 /// \brief We are matching the template parameter lists of two template 4510 /// template parameters as part of matching the template parameter lists 4511 /// of two templates that might be redeclarations. 4512 /// 4513 /// \code 4514 /// template<template<int I> class TT> struct X; 4515 /// template<template<int Value> class Other> struct X; 4516 /// \endcode 4517 TPL_TemplateTemplateParmMatch, 4518 4519 /// \brief We are matching the template parameter lists of a template 4520 /// template argument against the template parameter lists of a template 4521 /// template parameter. 4522 /// 4523 /// \code 4524 /// template<template<int Value> class Metafun> struct X; 4525 /// template<int Value> struct integer_c; 4526 /// X<integer_c> xic; 4527 /// \endcode 4528 TPL_TemplateTemplateArgumentMatch 4529 }; 4530 4531 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4532 TemplateParameterList *Old, 4533 bool Complain, 4534 TemplateParameterListEqualKind Kind, 4535 SourceLocation TemplateArgLoc 4536 = SourceLocation()); 4537 4538 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4539 4540 /// \brief Called when the parser has parsed a C++ typename 4541 /// specifier, e.g., "typename T::type". 4542 /// 4543 /// \param S The scope in which this typename type occurs. 4544 /// \param TypenameLoc the location of the 'typename' keyword 4545 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4546 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4547 /// \param IdLoc the location of the identifier. 4548 TypeResult 4549 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4550 const CXXScopeSpec &SS, const IdentifierInfo &II, 4551 SourceLocation IdLoc); 4552 4553 /// \brief Called when the parser has parsed a C++ typename 4554 /// specifier that ends in a template-id, e.g., 4555 /// "typename MetaFun::template apply<T1, T2>". 4556 /// 4557 /// \param S The scope in which this typename type occurs. 4558 /// \param TypenameLoc the location of the 'typename' keyword 4559 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4560 /// \param TemplateLoc the location of the 'template' keyword, if any. 4561 /// \param TemplateName The template name. 4562 /// \param TemplateNameLoc The location of the template name. 4563 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4564 /// \param TemplateArgs The template arguments. 4565 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4566 TypeResult 4567 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4568 const CXXScopeSpec &SS, 4569 SourceLocation TemplateLoc, 4570 TemplateTy Template, 4571 SourceLocation TemplateNameLoc, 4572 SourceLocation LAngleLoc, 4573 ASTTemplateArgsPtr TemplateArgs, 4574 SourceLocation RAngleLoc); 4575 4576 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4577 SourceLocation KeywordLoc, 4578 NestedNameSpecifierLoc QualifierLoc, 4579 const IdentifierInfo &II, 4580 SourceLocation IILoc); 4581 4582 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4583 SourceLocation Loc, 4584 DeclarationName Name); 4585 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4586 4587 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4588 bool RebuildTemplateParamsInCurrentInstantiation( 4589 TemplateParameterList *Params); 4590 4591 std::string 4592 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4593 const TemplateArgumentList &Args); 4594 4595 std::string 4596 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4597 const TemplateArgument *Args, 4598 unsigned NumArgs); 4599 4600 //===--------------------------------------------------------------------===// 4601 // C++ Variadic Templates (C++0x [temp.variadic]) 4602 //===--------------------------------------------------------------------===// 4603 4604 /// \brief The context in which an unexpanded parameter pack is 4605 /// being diagnosed. 4606 /// 4607 /// Note that the values of this enumeration line up with the first 4608 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4609 enum UnexpandedParameterPackContext { 4610 /// \brief An arbitrary expression. 4611 UPPC_Expression = 0, 4612 4613 /// \brief The base type of a class type. 4614 UPPC_BaseType, 4615 4616 /// \brief The type of an arbitrary declaration. 4617 UPPC_DeclarationType, 4618 4619 /// \brief The type of a data member. 4620 UPPC_DataMemberType, 4621 4622 /// \brief The size of a bit-field. 4623 UPPC_BitFieldWidth, 4624 4625 /// \brief The expression in a static assertion. 4626 UPPC_StaticAssertExpression, 4627 4628 /// \brief The fixed underlying type of an enumeration. 4629 UPPC_FixedUnderlyingType, 4630 4631 /// \brief The enumerator value. 4632 UPPC_EnumeratorValue, 4633 4634 /// \brief A using declaration. 4635 UPPC_UsingDeclaration, 4636 4637 /// \brief A friend declaration. 4638 UPPC_FriendDeclaration, 4639 4640 /// \brief A declaration qualifier. 4641 UPPC_DeclarationQualifier, 4642 4643 /// \brief An initializer. 4644 UPPC_Initializer, 4645 4646 /// \brief A default argument. 4647 UPPC_DefaultArgument, 4648 4649 /// \brief The type of a non-type template parameter. 4650 UPPC_NonTypeTemplateParameterType, 4651 4652 /// \brief The type of an exception. 4653 UPPC_ExceptionType, 4654 4655 /// \brief Partial specialization. 4656 UPPC_PartialSpecialization, 4657 4658 /// \brief Microsoft __if_exists. 4659 UPPC_IfExists, 4660 4661 /// \brief Microsoft __if_not_exists. 4662 UPPC_IfNotExists 4663}; 4664 4665 /// \brief Diagnose unexpanded parameter packs. 4666 /// 4667 /// \param Loc The location at which we should emit the diagnostic. 4668 /// 4669 /// \param UPPC The context in which we are diagnosing unexpanded 4670 /// parameter packs. 4671 /// 4672 /// \param Unexpanded the set of unexpanded parameter packs. 4673 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4674 UnexpandedParameterPackContext UPPC, 4675 ArrayRef<UnexpandedParameterPack> Unexpanded); 4676 4677 /// \brief If the given type contains an unexpanded parameter pack, 4678 /// diagnose the error. 4679 /// 4680 /// \param Loc The source location where a diagnostc should be emitted. 4681 /// 4682 /// \param T The type that is being checked for unexpanded parameter 4683 /// packs. 4684 /// 4685 /// \returns true if an error occurred, false otherwise. 4686 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4687 UnexpandedParameterPackContext UPPC); 4688 4689 /// \brief If the given expression contains an unexpanded parameter 4690 /// pack, diagnose the error. 4691 /// 4692 /// \param E The expression that is being checked for unexpanded 4693 /// parameter packs. 4694 /// 4695 /// \returns true if an error occurred, false otherwise. 4696 bool DiagnoseUnexpandedParameterPack(Expr *E, 4697 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4698 4699 /// \brief If the given nested-name-specifier contains an unexpanded 4700 /// parameter pack, diagnose the error. 4701 /// 4702 /// \param SS The nested-name-specifier that is being checked for 4703 /// unexpanded parameter packs. 4704 /// 4705 /// \returns true if an error occurred, false otherwise. 4706 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4707 UnexpandedParameterPackContext UPPC); 4708 4709 /// \brief If the given name contains an unexpanded parameter pack, 4710 /// diagnose the error. 4711 /// 4712 /// \param NameInfo The name (with source location information) that 4713 /// is being checked for unexpanded parameter packs. 4714 /// 4715 /// \returns true if an error occurred, false otherwise. 4716 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4717 UnexpandedParameterPackContext UPPC); 4718 4719 /// \brief If the given template name contains an unexpanded parameter pack, 4720 /// diagnose the error. 4721 /// 4722 /// \param Loc The location of the template name. 4723 /// 4724 /// \param Template The template name that is being checked for unexpanded 4725 /// parameter packs. 4726 /// 4727 /// \returns true if an error occurred, false otherwise. 4728 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4729 TemplateName Template, 4730 UnexpandedParameterPackContext UPPC); 4731 4732 /// \brief If the given template argument contains an unexpanded parameter 4733 /// pack, diagnose the error. 4734 /// 4735 /// \param Arg The template argument that is being checked for unexpanded 4736 /// parameter packs. 4737 /// 4738 /// \returns true if an error occurred, false otherwise. 4739 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4740 UnexpandedParameterPackContext UPPC); 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(TemplateArgument Arg, 4748 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4749 4750 /// \brief Collect the set of unexpanded parameter packs within the given 4751 /// template argument. 4752 /// 4753 /// \param Arg The template argument that will be traversed to find 4754 /// unexpanded parameter packs. 4755 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4756 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4757 4758 /// \brief Collect the set of unexpanded parameter packs within the given 4759 /// type. 4760 /// 4761 /// \param T The type that will be traversed to find 4762 /// unexpanded parameter packs. 4763 void collectUnexpandedParameterPacks(QualType T, 4764 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4765 4766 /// \brief Collect the set of unexpanded parameter packs within the given 4767 /// type. 4768 /// 4769 /// \param TL The type that will be traversed to find 4770 /// unexpanded parameter packs. 4771 void collectUnexpandedParameterPacks(TypeLoc TL, 4772 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4773 4774 /// \brief Collect the set of unexpanded parameter packs within the given 4775 /// nested-name-specifier. 4776 /// 4777 /// \param SS The nested-name-specifier that will be traversed to find 4778 /// unexpanded parameter packs. 4779 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4780 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4781 4782 /// \brief Collect the set of unexpanded parameter packs within the given 4783 /// name. 4784 /// 4785 /// \param NameInfo The name that will be traversed to find 4786 /// unexpanded parameter packs. 4787 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4788 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4789 4790 /// \brief Invoked when parsing a template argument followed by an 4791 /// ellipsis, which creates a pack expansion. 4792 /// 4793 /// \param Arg The template argument preceding the ellipsis, which 4794 /// may already be invalid. 4795 /// 4796 /// \param EllipsisLoc The location of the ellipsis. 4797 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4798 SourceLocation EllipsisLoc); 4799 4800 /// \brief Invoked when parsing a type followed by an ellipsis, which 4801 /// creates a pack expansion. 4802 /// 4803 /// \param Type The type preceding the ellipsis, which will become 4804 /// the pattern of the pack expansion. 4805 /// 4806 /// \param EllipsisLoc The location of the ellipsis. 4807 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4808 4809 /// \brief Construct a pack expansion type from the pattern of the pack 4810 /// expansion. 4811 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4812 SourceLocation EllipsisLoc, 4813 llvm::Optional<unsigned> NumExpansions); 4814 4815 /// \brief Construct a pack expansion type from the pattern of the pack 4816 /// expansion. 4817 QualType CheckPackExpansion(QualType Pattern, 4818 SourceRange PatternRange, 4819 SourceLocation EllipsisLoc, 4820 llvm::Optional<unsigned> NumExpansions); 4821 4822 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4823 /// creates a pack expansion. 4824 /// 4825 /// \param Pattern The expression preceding the ellipsis, which will become 4826 /// the pattern of the pack expansion. 4827 /// 4828 /// \param EllipsisLoc The location of the ellipsis. 4829 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4830 4831 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4832 /// creates a pack expansion. 4833 /// 4834 /// \param Pattern The expression preceding the ellipsis, which will become 4835 /// the pattern of the pack expansion. 4836 /// 4837 /// \param EllipsisLoc The location of the ellipsis. 4838 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4839 llvm::Optional<unsigned> NumExpansions); 4840 4841 /// \brief Determine whether we could expand a pack expansion with the 4842 /// given set of parameter packs into separate arguments by repeatedly 4843 /// transforming the pattern. 4844 /// 4845 /// \param EllipsisLoc The location of the ellipsis that identifies the 4846 /// pack expansion. 4847 /// 4848 /// \param PatternRange The source range that covers the entire pattern of 4849 /// the pack expansion. 4850 /// 4851 /// \param Unexpanded The set of unexpanded parameter packs within the 4852 /// pattern. 4853 /// 4854 /// \param NumUnexpanded The number of unexpanded parameter packs in 4855 /// \p Unexpanded. 4856 /// 4857 /// \param ShouldExpand Will be set to \c true if the transformer should 4858 /// expand the corresponding pack expansions into separate arguments. When 4859 /// set, \c NumExpansions must also be set. 4860 /// 4861 /// \param RetainExpansion Whether the caller should add an unexpanded 4862 /// pack expansion after all of the expanded arguments. This is used 4863 /// when extending explicitly-specified template argument packs per 4864 /// C++0x [temp.arg.explicit]p9. 4865 /// 4866 /// \param NumExpansions The number of separate arguments that will be in 4867 /// the expanded form of the corresponding pack expansion. This is both an 4868 /// input and an output parameter, which can be set by the caller if the 4869 /// number of expansions is known a priori (e.g., due to a prior substitution) 4870 /// and will be set by the callee when the number of expansions is known. 4871 /// The callee must set this value when \c ShouldExpand is \c true; it may 4872 /// set this value in other cases. 4873 /// 4874 /// \returns true if an error occurred (e.g., because the parameter packs 4875 /// are to be instantiated with arguments of different lengths), false 4876 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4877 /// must be set. 4878 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4879 SourceRange PatternRange, 4880 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4881 const MultiLevelTemplateArgumentList &TemplateArgs, 4882 bool &ShouldExpand, 4883 bool &RetainExpansion, 4884 llvm::Optional<unsigned> &NumExpansions); 4885 4886 /// \brief Determine the number of arguments in the given pack expansion 4887 /// type. 4888 /// 4889 /// This routine already assumes that the pack expansion type can be 4890 /// expanded and that the number of arguments in the expansion is 4891 /// consistent across all of the unexpanded parameter packs in its pattern. 4892 unsigned getNumArgumentsInExpansion(QualType T, 4893 const MultiLevelTemplateArgumentList &TemplateArgs); 4894 4895 /// \brief Determine whether the given declarator contains any unexpanded 4896 /// parameter packs. 4897 /// 4898 /// This routine is used by the parser to disambiguate function declarators 4899 /// with an ellipsis prior to the ')', e.g., 4900 /// 4901 /// \code 4902 /// void f(T...); 4903 /// \endcode 4904 /// 4905 /// To determine whether we have an (unnamed) function parameter pack or 4906 /// a variadic function. 4907 /// 4908 /// \returns true if the declarator contains any unexpanded parameter packs, 4909 /// false otherwise. 4910 bool containsUnexpandedParameterPacks(Declarator &D); 4911 4912 //===--------------------------------------------------------------------===// 4913 // C++ Template Argument Deduction (C++ [temp.deduct]) 4914 //===--------------------------------------------------------------------===// 4915 4916 /// \brief Describes the result of template argument deduction. 4917 /// 4918 /// The TemplateDeductionResult enumeration describes the result of 4919 /// template argument deduction, as returned from 4920 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4921 /// structure provides additional information about the results of 4922 /// template argument deduction, e.g., the deduced template argument 4923 /// list (if successful) or the specific template parameters or 4924 /// deduced arguments that were involved in the failure. 4925 enum TemplateDeductionResult { 4926 /// \brief Template argument deduction was successful. 4927 TDK_Success = 0, 4928 /// \brief Template argument deduction exceeded the maximum template 4929 /// instantiation depth (which has already been diagnosed). 4930 TDK_InstantiationDepth, 4931 /// \brief Template argument deduction did not deduce a value 4932 /// for every template parameter. 4933 TDK_Incomplete, 4934 /// \brief Template argument deduction produced inconsistent 4935 /// deduced values for the given template parameter. 4936 TDK_Inconsistent, 4937 /// \brief Template argument deduction failed due to inconsistent 4938 /// cv-qualifiers on a template parameter type that would 4939 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4940 /// but were given a non-const "X". 4941 TDK_Underqualified, 4942 /// \brief Substitution of the deduced template argument values 4943 /// resulted in an error. 4944 TDK_SubstitutionFailure, 4945 /// \brief Substitution of the deduced template argument values 4946 /// into a non-deduced context produced a type or value that 4947 /// produces a type that does not match the original template 4948 /// arguments provided. 4949 TDK_NonDeducedMismatch, 4950 /// \brief When performing template argument deduction for a function 4951 /// template, there were too many call arguments. 4952 TDK_TooManyArguments, 4953 /// \brief When performing template argument deduction for a function 4954 /// template, there were too few call arguments. 4955 TDK_TooFewArguments, 4956 /// \brief The explicitly-specified template arguments were not valid 4957 /// template arguments for the given template. 4958 TDK_InvalidExplicitArguments, 4959 /// \brief The arguments included an overloaded function name that could 4960 /// not be resolved to a suitable function. 4961 TDK_FailedOverloadResolution 4962 }; 4963 4964 TemplateDeductionResult 4965 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4966 const TemplateArgumentList &TemplateArgs, 4967 sema::TemplateDeductionInfo &Info); 4968 4969 TemplateDeductionResult 4970 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4971 TemplateArgumentListInfo &ExplicitTemplateArgs, 4972 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4973 SmallVectorImpl<QualType> &ParamTypes, 4974 QualType *FunctionType, 4975 sema::TemplateDeductionInfo &Info); 4976 4977 /// brief A function argument from which we performed template argument 4978 // deduction for a call. 4979 struct OriginalCallArg { 4980 OriginalCallArg(QualType OriginalParamType, 4981 unsigned ArgIdx, 4982 QualType OriginalArgType) 4983 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4984 OriginalArgType(OriginalArgType) { } 4985 4986 QualType OriginalParamType; 4987 unsigned ArgIdx; 4988 QualType OriginalArgType; 4989 }; 4990 4991 TemplateDeductionResult 4992 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4993 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4994 unsigned NumExplicitlySpecified, 4995 FunctionDecl *&Specialization, 4996 sema::TemplateDeductionInfo &Info, 4997 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4998 4999 TemplateDeductionResult 5000 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5001 TemplateArgumentListInfo *ExplicitTemplateArgs, 5002 llvm::ArrayRef<Expr *> Args, 5003 FunctionDecl *&Specialization, 5004 sema::TemplateDeductionInfo &Info); 5005 5006 TemplateDeductionResult 5007 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5008 TemplateArgumentListInfo *ExplicitTemplateArgs, 5009 QualType ArgFunctionType, 5010 FunctionDecl *&Specialization, 5011 sema::TemplateDeductionInfo &Info); 5012 5013 TemplateDeductionResult 5014 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5015 QualType ToType, 5016 CXXConversionDecl *&Specialization, 5017 sema::TemplateDeductionInfo &Info); 5018 5019 TemplateDeductionResult 5020 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 5021 TemplateArgumentListInfo *ExplicitTemplateArgs, 5022 FunctionDecl *&Specialization, 5023 sema::TemplateDeductionInfo &Info); 5024 5025 /// \brief Result type of DeduceAutoType. 5026 enum DeduceAutoResult { 5027 DAR_Succeeded, 5028 DAR_Failed, 5029 DAR_FailedAlreadyDiagnosed 5030 }; 5031 5032 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 5033 TypeSourceInfo *&Result); 5034 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 5035 5036 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 5037 FunctionTemplateDecl *FT2, 5038 SourceLocation Loc, 5039 TemplatePartialOrderingContext TPOC, 5040 unsigned NumCallArguments); 5041 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 5042 UnresolvedSetIterator SEnd, 5043 TemplatePartialOrderingContext TPOC, 5044 unsigned NumCallArguments, 5045 SourceLocation Loc, 5046 const PartialDiagnostic &NoneDiag, 5047 const PartialDiagnostic &AmbigDiag, 5048 const PartialDiagnostic &CandidateDiag, 5049 bool Complain = true, 5050 QualType TargetType = QualType()); 5051 5052 ClassTemplatePartialSpecializationDecl * 5053 getMoreSpecializedPartialSpecialization( 5054 ClassTemplatePartialSpecializationDecl *PS1, 5055 ClassTemplatePartialSpecializationDecl *PS2, 5056 SourceLocation Loc); 5057 5058 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 5059 bool OnlyDeduced, 5060 unsigned Depth, 5061 llvm::SmallBitVector &Used); 5062 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 5063 llvm::SmallBitVector &Deduced) { 5064 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 5065 } 5066 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 5067 FunctionTemplateDecl *FunctionTemplate, 5068 llvm::SmallBitVector &Deduced); 5069 5070 //===--------------------------------------------------------------------===// 5071 // C++ Template Instantiation 5072 // 5073 5074 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 5075 const TemplateArgumentList *Innermost = 0, 5076 bool RelativeToPrimary = false, 5077 const FunctionDecl *Pattern = 0); 5078 5079 /// \brief A template instantiation that is currently in progress. 5080 struct ActiveTemplateInstantiation { 5081 /// \brief The kind of template instantiation we are performing 5082 enum InstantiationKind { 5083 /// We are instantiating a template declaration. The entity is 5084 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 5085 TemplateInstantiation, 5086 5087 /// We are instantiating a default argument for a template 5088 /// parameter. The Entity is the template, and 5089 /// TemplateArgs/NumTemplateArguments provides the template 5090 /// arguments as specified. 5091 /// FIXME: Use a TemplateArgumentList 5092 DefaultTemplateArgumentInstantiation, 5093 5094 /// We are instantiating a default argument for a function. 5095 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 5096 /// provides the template arguments as specified. 5097 DefaultFunctionArgumentInstantiation, 5098 5099 /// We are substituting explicit template arguments provided for 5100 /// a function template. The entity is a FunctionTemplateDecl. 5101 ExplicitTemplateArgumentSubstitution, 5102 5103 /// We are substituting template argument determined as part of 5104 /// template argument deduction for either a class template 5105 /// partial specialization or a function template. The 5106 /// Entity is either a ClassTemplatePartialSpecializationDecl or 5107 /// a FunctionTemplateDecl. 5108 DeducedTemplateArgumentSubstitution, 5109 5110 /// We are substituting prior template arguments into a new 5111 /// template parameter. The template parameter itself is either a 5112 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 5113 PriorTemplateArgumentSubstitution, 5114 5115 /// We are checking the validity of a default template argument that 5116 /// has been used when naming a template-id. 5117 DefaultTemplateArgumentChecking 5118 } Kind; 5119 5120 /// \brief The point of instantiation within the source code. 5121 SourceLocation PointOfInstantiation; 5122 5123 /// \brief The template (or partial specialization) in which we are 5124 /// performing the instantiation, for substitutions of prior template 5125 /// arguments. 5126 NamedDecl *Template; 5127 5128 /// \brief The entity that is being instantiated. 5129 uintptr_t Entity; 5130 5131 /// \brief The list of template arguments we are substituting, if they 5132 /// are not part of the entity. 5133 const TemplateArgument *TemplateArgs; 5134 5135 /// \brief The number of template arguments in TemplateArgs. 5136 unsigned NumTemplateArgs; 5137 5138 /// \brief The template deduction info object associated with the 5139 /// substitution or checking of explicit or deduced template arguments. 5140 sema::TemplateDeductionInfo *DeductionInfo; 5141 5142 /// \brief The source range that covers the construct that cause 5143 /// the instantiation, e.g., the template-id that causes a class 5144 /// template instantiation. 5145 SourceRange InstantiationRange; 5146 5147 ActiveTemplateInstantiation() 5148 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 5149 NumTemplateArgs(0), DeductionInfo(0) {} 5150 5151 /// \brief Determines whether this template is an actual instantiation 5152 /// that should be counted toward the maximum instantiation depth. 5153 bool isInstantiationRecord() const; 5154 5155 friend bool operator==(const ActiveTemplateInstantiation &X, 5156 const ActiveTemplateInstantiation &Y) { 5157 if (X.Kind != Y.Kind) 5158 return false; 5159 5160 if (X.Entity != Y.Entity) 5161 return false; 5162 5163 switch (X.Kind) { 5164 case TemplateInstantiation: 5165 return true; 5166 5167 case PriorTemplateArgumentSubstitution: 5168 case DefaultTemplateArgumentChecking: 5169 if (X.Template != Y.Template) 5170 return false; 5171 5172 // Fall through 5173 5174 case DefaultTemplateArgumentInstantiation: 5175 case ExplicitTemplateArgumentSubstitution: 5176 case DeducedTemplateArgumentSubstitution: 5177 case DefaultFunctionArgumentInstantiation: 5178 return X.TemplateArgs == Y.TemplateArgs; 5179 5180 } 5181 5182 llvm_unreachable("Invalid InstantiationKind!"); 5183 } 5184 5185 friend bool operator!=(const ActiveTemplateInstantiation &X, 5186 const ActiveTemplateInstantiation &Y) { 5187 return !(X == Y); 5188 } 5189 }; 5190 5191 /// \brief List of active template instantiations. 5192 /// 5193 /// This vector is treated as a stack. As one template instantiation 5194 /// requires another template instantiation, additional 5195 /// instantiations are pushed onto the stack up to a 5196 /// user-configurable limit LangOptions::InstantiationDepth. 5197 SmallVector<ActiveTemplateInstantiation, 16> 5198 ActiveTemplateInstantiations; 5199 5200 /// \brief Whether we are in a SFINAE context that is not associated with 5201 /// template instantiation. 5202 /// 5203 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5204 /// of a template instantiation or template argument deduction. 5205 bool InNonInstantiationSFINAEContext; 5206 5207 /// \brief The number of ActiveTemplateInstantiation entries in 5208 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5209 /// therefore, should not be counted as part of the instantiation depth. 5210 unsigned NonInstantiationEntries; 5211 5212 /// \brief The last template from which a template instantiation 5213 /// error or warning was produced. 5214 /// 5215 /// This value is used to suppress printing of redundant template 5216 /// instantiation backtraces when there are multiple errors in the 5217 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5218 /// to implement it anywhere else. 5219 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5220 5221 /// \brief The current index into pack expansion arguments that will be 5222 /// used for substitution of parameter packs. 5223 /// 5224 /// The pack expansion index will be -1 to indicate that parameter packs 5225 /// should be instantiated as themselves. Otherwise, the index specifies 5226 /// which argument within the parameter pack will be used for substitution. 5227 int ArgumentPackSubstitutionIndex; 5228 5229 /// \brief RAII object used to change the argument pack substitution index 5230 /// within a \c Sema object. 5231 /// 5232 /// See \c ArgumentPackSubstitutionIndex for more information. 5233 class ArgumentPackSubstitutionIndexRAII { 5234 Sema &Self; 5235 int OldSubstitutionIndex; 5236 5237 public: 5238 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5239 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5240 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5241 } 5242 5243 ~ArgumentPackSubstitutionIndexRAII() { 5244 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5245 } 5246 }; 5247 5248 friend class ArgumentPackSubstitutionRAII; 5249 5250 /// \brief The stack of calls expression undergoing template instantiation. 5251 /// 5252 /// The top of this stack is used by a fixit instantiating unresolved 5253 /// function calls to fix the AST to match the textual change it prints. 5254 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5255 5256 /// \brief For each declaration that involved template argument deduction, the 5257 /// set of diagnostics that were suppressed during that template argument 5258 /// deduction. 5259 /// 5260 /// FIXME: Serialize this structure to the AST file. 5261 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5262 SuppressedDiagnostics; 5263 5264 /// \brief A stack object to be created when performing template 5265 /// instantiation. 5266 /// 5267 /// Construction of an object of type \c InstantiatingTemplate 5268 /// pushes the current instantiation onto the stack of active 5269 /// instantiations. If the size of this stack exceeds the maximum 5270 /// number of recursive template instantiations, construction 5271 /// produces an error and evaluates true. 5272 /// 5273 /// Destruction of this object will pop the named instantiation off 5274 /// the stack. 5275 struct InstantiatingTemplate { 5276 /// \brief Note that we are instantiating a class template, 5277 /// function template, or a member thereof. 5278 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5279 Decl *Entity, 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 TemplateDecl *Template, 5286 const TemplateArgument *TemplateArgs, 5287 unsigned NumTemplateArgs, 5288 SourceRange InstantiationRange = SourceRange()); 5289 5290 /// \brief Note that we are instantiating a default argument in a 5291 /// template-id. 5292 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5293 FunctionTemplateDecl *FunctionTemplate, 5294 const TemplateArgument *TemplateArgs, 5295 unsigned NumTemplateArgs, 5296 ActiveTemplateInstantiation::InstantiationKind Kind, 5297 sema::TemplateDeductionInfo &DeductionInfo, 5298 SourceRange InstantiationRange = SourceRange()); 5299 5300 /// \brief Note that we are instantiating as part of template 5301 /// argument deduction for a class template partial 5302 /// specialization. 5303 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5304 ClassTemplatePartialSpecializationDecl *PartialSpec, 5305 const TemplateArgument *TemplateArgs, 5306 unsigned NumTemplateArgs, 5307 sema::TemplateDeductionInfo &DeductionInfo, 5308 SourceRange InstantiationRange = SourceRange()); 5309 5310 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5311 ParmVarDecl *Param, 5312 const TemplateArgument *TemplateArgs, 5313 unsigned NumTemplateArgs, 5314 SourceRange InstantiationRange = SourceRange()); 5315 5316 /// \brief Note that we are substituting prior template arguments into a 5317 /// non-type or template template parameter. 5318 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5319 NamedDecl *Template, 5320 NonTypeTemplateParmDecl *Param, 5321 const TemplateArgument *TemplateArgs, 5322 unsigned NumTemplateArgs, 5323 SourceRange InstantiationRange); 5324 5325 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5326 NamedDecl *Template, 5327 TemplateTemplateParmDecl *Param, 5328 const TemplateArgument *TemplateArgs, 5329 unsigned NumTemplateArgs, 5330 SourceRange InstantiationRange); 5331 5332 /// \brief Note that we are checking the default template argument 5333 /// against the template parameter for a given template-id. 5334 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5335 TemplateDecl *Template, 5336 NamedDecl *Param, 5337 const TemplateArgument *TemplateArgs, 5338 unsigned NumTemplateArgs, 5339 SourceRange InstantiationRange); 5340 5341 5342 /// \brief Note that we have finished instantiating this template. 5343 void Clear(); 5344 5345 ~InstantiatingTemplate() { Clear(); } 5346 5347 /// \brief Determines whether we have exceeded the maximum 5348 /// recursive template instantiations. 5349 operator bool() const { return Invalid; } 5350 5351 private: 5352 Sema &SemaRef; 5353 bool Invalid; 5354 bool SavedInNonInstantiationSFINAEContext; 5355 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5356 SourceRange InstantiationRange); 5357 5358 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5359 5360 InstantiatingTemplate& 5361 operator=(const InstantiatingTemplate&); // not implemented 5362 }; 5363 5364 void PrintInstantiationStack(); 5365 5366 /// \brief Determines whether we are currently in a context where 5367 /// template argument substitution failures are not considered 5368 /// errors. 5369 /// 5370 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5371 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5372 /// template-deduction context object, which can be used to capture 5373 /// diagnostics that will be suppressed. 5374 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5375 5376 /// \brief RAII class used to determine whether SFINAE has 5377 /// trapped any errors that occur during template argument 5378 /// deduction.` 5379 class SFINAETrap { 5380 Sema &SemaRef; 5381 unsigned PrevSFINAEErrors; 5382 bool PrevInNonInstantiationSFINAEContext; 5383 bool PrevAccessCheckingSFINAE; 5384 5385 public: 5386 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5387 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5388 PrevInNonInstantiationSFINAEContext( 5389 SemaRef.InNonInstantiationSFINAEContext), 5390 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5391 { 5392 if (!SemaRef.isSFINAEContext()) 5393 SemaRef.InNonInstantiationSFINAEContext = true; 5394 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5395 } 5396 5397 ~SFINAETrap() { 5398 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5399 SemaRef.InNonInstantiationSFINAEContext 5400 = PrevInNonInstantiationSFINAEContext; 5401 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5402 } 5403 5404 /// \brief Determine whether any SFINAE errors have been trapped. 5405 bool hasErrorOccurred() const { 5406 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5407 } 5408 }; 5409 5410 /// \brief The current instantiation scope used to store local 5411 /// variables. 5412 LocalInstantiationScope *CurrentInstantiationScope; 5413 5414 /// \brief The number of typos corrected by CorrectTypo. 5415 unsigned TyposCorrected; 5416 5417 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5418 UnqualifiedTyposCorrectedMap; 5419 5420 /// \brief A cache containing the results of typo correction for unqualified 5421 /// name lookup. 5422 /// 5423 /// The string is the string that we corrected to (which may be empty, if 5424 /// there was no correction), while the boolean will be true when the 5425 /// string represents a keyword. 5426 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5427 5428 /// \brief Worker object for performing CFG-based warnings. 5429 sema::AnalysisBasedWarnings AnalysisWarnings; 5430 5431 /// \brief An entity for which implicit template instantiation is required. 5432 /// 5433 /// The source location associated with the declaration is the first place in 5434 /// the source code where the declaration was "used". It is not necessarily 5435 /// the point of instantiation (which will be either before or after the 5436 /// namespace-scope declaration that triggered this implicit instantiation), 5437 /// However, it is the location that diagnostics should generally refer to, 5438 /// because users will need to know what code triggered the instantiation. 5439 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5440 5441 /// \brief The queue of implicit template instantiations that are required 5442 /// but have not yet been performed. 5443 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5444 5445 /// \brief The queue of implicit template instantiations that are required 5446 /// and must be performed within the current local scope. 5447 /// 5448 /// This queue is only used for member functions of local classes in 5449 /// templates, which must be instantiated in the same scope as their 5450 /// enclosing function, so that they can reference function-local 5451 /// types, static variables, enumerators, etc. 5452 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5453 5454 void PerformPendingInstantiations(bool LocalOnly = false); 5455 5456 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5457 const MultiLevelTemplateArgumentList &TemplateArgs, 5458 SourceLocation Loc, DeclarationName Entity); 5459 5460 QualType SubstType(QualType T, 5461 const MultiLevelTemplateArgumentList &TemplateArgs, 5462 SourceLocation Loc, DeclarationName Entity); 5463 5464 TypeSourceInfo *SubstType(TypeLoc TL, 5465 const MultiLevelTemplateArgumentList &TemplateArgs, 5466 SourceLocation Loc, DeclarationName Entity); 5467 5468 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5469 const MultiLevelTemplateArgumentList &TemplateArgs, 5470 SourceLocation Loc, 5471 DeclarationName Entity); 5472 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5473 const MultiLevelTemplateArgumentList &TemplateArgs, 5474 int indexAdjustment, 5475 llvm::Optional<unsigned> NumExpansions, 5476 bool ExpectParameterPack); 5477 bool SubstParmTypes(SourceLocation Loc, 5478 ParmVarDecl **Params, unsigned NumParams, 5479 const MultiLevelTemplateArgumentList &TemplateArgs, 5480 SmallVectorImpl<QualType> &ParamTypes, 5481 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5482 ExprResult SubstExpr(Expr *E, 5483 const MultiLevelTemplateArgumentList &TemplateArgs); 5484 5485 /// \brief Substitute the given template arguments into a list of 5486 /// expressions, expanding pack expansions if required. 5487 /// 5488 /// \param Exprs The list of expressions to substitute into. 5489 /// 5490 /// \param NumExprs The number of expressions in \p Exprs. 5491 /// 5492 /// \param IsCall Whether this is some form of call, in which case 5493 /// default arguments will be dropped. 5494 /// 5495 /// \param TemplateArgs The set of template arguments to substitute. 5496 /// 5497 /// \param Outputs Will receive all of the substituted arguments. 5498 /// 5499 /// \returns true if an error occurred, false otherwise. 5500 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5501 const MultiLevelTemplateArgumentList &TemplateArgs, 5502 SmallVectorImpl<Expr *> &Outputs); 5503 5504 StmtResult SubstStmt(Stmt *S, 5505 const MultiLevelTemplateArgumentList &TemplateArgs); 5506 5507 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5508 const MultiLevelTemplateArgumentList &TemplateArgs); 5509 5510 ExprResult SubstInitializer(Expr *E, 5511 const MultiLevelTemplateArgumentList &TemplateArgs, 5512 bool CXXDirectInit); 5513 5514 bool 5515 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5516 CXXRecordDecl *Pattern, 5517 const MultiLevelTemplateArgumentList &TemplateArgs); 5518 5519 bool 5520 InstantiateClass(SourceLocation PointOfInstantiation, 5521 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5522 const MultiLevelTemplateArgumentList &TemplateArgs, 5523 TemplateSpecializationKind TSK, 5524 bool Complain = true); 5525 5526 bool InstantiateEnum(SourceLocation PointOfInstantiation, 5527 EnumDecl *Instantiation, EnumDecl *Pattern, 5528 const MultiLevelTemplateArgumentList &TemplateArgs, 5529 TemplateSpecializationKind TSK); 5530 5531 struct LateInstantiatedAttribute { 5532 const Attr *TmplAttr; 5533 LocalInstantiationScope *Scope; 5534 Decl *NewDecl; 5535 5536 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5537 Decl *D) 5538 : TmplAttr(A), Scope(S), NewDecl(D) 5539 { } 5540 }; 5541 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5542 5543 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5544 const Decl *Pattern, Decl *Inst, 5545 LateInstantiatedAttrVec *LateAttrs = 0, 5546 LocalInstantiationScope *OuterMostScope = 0); 5547 5548 bool 5549 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5550 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5551 TemplateSpecializationKind TSK, 5552 bool Complain = true); 5553 5554 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5555 CXXRecordDecl *Instantiation, 5556 const MultiLevelTemplateArgumentList &TemplateArgs, 5557 TemplateSpecializationKind TSK); 5558 5559 void InstantiateClassTemplateSpecializationMembers( 5560 SourceLocation PointOfInstantiation, 5561 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5562 TemplateSpecializationKind TSK); 5563 5564 NestedNameSpecifierLoc 5565 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5566 const MultiLevelTemplateArgumentList &TemplateArgs); 5567 5568 DeclarationNameInfo 5569 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5570 const MultiLevelTemplateArgumentList &TemplateArgs); 5571 TemplateName 5572 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5573 SourceLocation Loc, 5574 const MultiLevelTemplateArgumentList &TemplateArgs); 5575 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5576 TemplateArgumentListInfo &Result, 5577 const MultiLevelTemplateArgumentList &TemplateArgs); 5578 5579 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5580 FunctionDecl *Function, 5581 bool Recursive = false, 5582 bool DefinitionRequired = false); 5583 void InstantiateStaticDataMemberDefinition( 5584 SourceLocation PointOfInstantiation, 5585 VarDecl *Var, 5586 bool Recursive = false, 5587 bool DefinitionRequired = false); 5588 5589 void InstantiateMemInitializers(CXXConstructorDecl *New, 5590 const CXXConstructorDecl *Tmpl, 5591 const MultiLevelTemplateArgumentList &TemplateArgs); 5592 5593 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5594 const MultiLevelTemplateArgumentList &TemplateArgs); 5595 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5596 const MultiLevelTemplateArgumentList &TemplateArgs); 5597 5598 // Objective-C declarations. 5599 enum ObjCContainerKind { 5600 OCK_None = -1, 5601 OCK_Interface = 0, 5602 OCK_Protocol, 5603 OCK_Category, 5604 OCK_ClassExtension, 5605 OCK_Implementation, 5606 OCK_CategoryImplementation 5607 }; 5608 ObjCContainerKind getObjCContainerKind() const; 5609 5610 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5611 IdentifierInfo *ClassName, 5612 SourceLocation ClassLoc, 5613 IdentifierInfo *SuperName, 5614 SourceLocation SuperLoc, 5615 Decl * const *ProtoRefs, 5616 unsigned NumProtoRefs, 5617 const SourceLocation *ProtoLocs, 5618 SourceLocation EndProtoLoc, 5619 AttributeList *AttrList); 5620 5621 Decl *ActOnCompatiblityAlias( 5622 SourceLocation AtCompatibilityAliasLoc, 5623 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5624 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5625 5626 bool CheckForwardProtocolDeclarationForCircularDependency( 5627 IdentifierInfo *PName, 5628 SourceLocation &PLoc, SourceLocation PrevLoc, 5629 const ObjCList<ObjCProtocolDecl> &PList); 5630 5631 Decl *ActOnStartProtocolInterface( 5632 SourceLocation AtProtoInterfaceLoc, 5633 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5634 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5635 const SourceLocation *ProtoLocs, 5636 SourceLocation EndProtoLoc, 5637 AttributeList *AttrList); 5638 5639 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5640 IdentifierInfo *ClassName, 5641 SourceLocation ClassLoc, 5642 IdentifierInfo *CategoryName, 5643 SourceLocation CategoryLoc, 5644 Decl * const *ProtoRefs, 5645 unsigned NumProtoRefs, 5646 const SourceLocation *ProtoLocs, 5647 SourceLocation EndProtoLoc); 5648 5649 Decl *ActOnStartClassImplementation( 5650 SourceLocation AtClassImplLoc, 5651 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5652 IdentifierInfo *SuperClassname, 5653 SourceLocation SuperClassLoc); 5654 5655 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5656 IdentifierInfo *ClassName, 5657 SourceLocation ClassLoc, 5658 IdentifierInfo *CatName, 5659 SourceLocation CatLoc); 5660 5661 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5662 ArrayRef<Decl *> Decls); 5663 5664 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5665 IdentifierInfo **IdentList, 5666 SourceLocation *IdentLocs, 5667 unsigned NumElts); 5668 5669 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5670 const IdentifierLocPair *IdentList, 5671 unsigned NumElts, 5672 AttributeList *attrList); 5673 5674 void FindProtocolDeclaration(bool WarnOnDeclarations, 5675 const IdentifierLocPair *ProtocolId, 5676 unsigned NumProtocols, 5677 SmallVectorImpl<Decl *> &Protocols); 5678 5679 /// Ensure attributes are consistent with type. 5680 /// \param [in, out] Attributes The attributes to check; they will 5681 /// be modified to be consistent with \arg PropertyTy. 5682 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5683 SourceLocation Loc, 5684 unsigned &Attributes); 5685 5686 /// Process the specified property declaration and create decls for the 5687 /// setters and getters as needed. 5688 /// \param property The property declaration being processed 5689 /// \param DC The semantic container for the property 5690 /// \param redeclaredProperty Declaration for property if redeclared 5691 /// in class extension. 5692 /// \param lexicalDC Container for redeclaredProperty. 5693 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5694 ObjCContainerDecl *DC, 5695 ObjCPropertyDecl *redeclaredProperty = 0, 5696 ObjCContainerDecl *lexicalDC = 0); 5697 5698 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5699 ObjCPropertyDecl *SuperProperty, 5700 const IdentifierInfo *Name); 5701 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5702 5703 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5704 ObjCMethodDecl *MethodDecl, 5705 bool IsInstance); 5706 5707 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5708 5709 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5710 ObjCInterfaceDecl *ID); 5711 5712 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5713 ObjCProtocolDecl *PDecl); 5714 5715 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5716 Decl **allMethods = 0, unsigned allNum = 0, 5717 Decl **allProperties = 0, unsigned pNum = 0, 5718 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5719 5720 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5721 SourceLocation LParenLoc, 5722 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5723 Selector GetterSel, Selector SetterSel, 5724 bool *OverridingProperty, 5725 tok::ObjCKeywordKind MethodImplKind, 5726 DeclContext *lexicalDC = 0); 5727 5728 Decl *ActOnPropertyImplDecl(Scope *S, 5729 SourceLocation AtLoc, 5730 SourceLocation PropertyLoc, 5731 bool ImplKind, 5732 IdentifierInfo *PropertyId, 5733 IdentifierInfo *PropertyIvar, 5734 SourceLocation PropertyIvarLoc); 5735 5736 enum ObjCSpecialMethodKind { 5737 OSMK_None, 5738 OSMK_Alloc, 5739 OSMK_New, 5740 OSMK_Copy, 5741 OSMK_RetainingInit, 5742 OSMK_NonRetainingInit 5743 }; 5744 5745 struct ObjCArgInfo { 5746 IdentifierInfo *Name; 5747 SourceLocation NameLoc; 5748 // The Type is null if no type was specified, and the DeclSpec is invalid 5749 // in this case. 5750 ParsedType Type; 5751 ObjCDeclSpec DeclSpec; 5752 5753 /// ArgAttrs - Attribute list for this argument. 5754 AttributeList *ArgAttrs; 5755 }; 5756 5757 Decl *ActOnMethodDeclaration( 5758 Scope *S, 5759 SourceLocation BeginLoc, // location of the + or -. 5760 SourceLocation EndLoc, // location of the ; or {. 5761 tok::TokenKind MethodType, 5762 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5763 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5764 // optional arguments. The number of types/arguments is obtained 5765 // from the Sel.getNumArgs(). 5766 ObjCArgInfo *ArgInfo, 5767 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5768 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5769 bool isVariadic, bool MethodDefinition); 5770 5771 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5772 // Will search "local" class/category implementations for a method decl. 5773 // Will also search in class's root looking for instance method. 5774 // Returns 0 if no method is found. 5775 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5776 ObjCInterfaceDecl *CDecl); 5777 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5778 ObjCInterfaceDecl *ClassDecl); 5779 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5780 const ObjCObjectPointerType *OPT, 5781 bool IsInstance); 5782 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5783 bool IsInstance); 5784 5785 bool inferObjCARCLifetime(ValueDecl *decl); 5786 5787 ExprResult 5788 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5789 Expr *BaseExpr, 5790 SourceLocation OpLoc, 5791 DeclarationName MemberName, 5792 SourceLocation MemberLoc, 5793 SourceLocation SuperLoc, QualType SuperType, 5794 bool Super); 5795 5796 ExprResult 5797 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5798 IdentifierInfo &propertyName, 5799 SourceLocation receiverNameLoc, 5800 SourceLocation propertyNameLoc); 5801 5802 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5803 5804 /// \brief Describes the kind of message expression indicated by a message 5805 /// send that starts with an identifier. 5806 enum ObjCMessageKind { 5807 /// \brief The message is sent to 'super'. 5808 ObjCSuperMessage, 5809 /// \brief The message is an instance message. 5810 ObjCInstanceMessage, 5811 /// \brief The message is a class message, and the identifier is a type 5812 /// name. 5813 ObjCClassMessage 5814 }; 5815 5816 ObjCMessageKind getObjCMessageKind(Scope *S, 5817 IdentifierInfo *Name, 5818 SourceLocation NameLoc, 5819 bool IsSuper, 5820 bool HasTrailingDot, 5821 ParsedType &ReceiverType); 5822 5823 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5824 Selector Sel, 5825 SourceLocation LBracLoc, 5826 ArrayRef<SourceLocation> SelectorLocs, 5827 SourceLocation RBracLoc, 5828 MultiExprArg Args); 5829 5830 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5831 QualType ReceiverType, 5832 SourceLocation SuperLoc, 5833 Selector Sel, 5834 ObjCMethodDecl *Method, 5835 SourceLocation LBracLoc, 5836 ArrayRef<SourceLocation> SelectorLocs, 5837 SourceLocation RBracLoc, 5838 MultiExprArg Args, 5839 bool isImplicit = false); 5840 5841 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5842 bool isSuperReceiver, 5843 SourceLocation Loc, 5844 Selector Sel, 5845 ObjCMethodDecl *Method, 5846 MultiExprArg Args); 5847 5848 ExprResult ActOnClassMessage(Scope *S, 5849 ParsedType Receiver, 5850 Selector Sel, 5851 SourceLocation LBracLoc, 5852 ArrayRef<SourceLocation> SelectorLocs, 5853 SourceLocation RBracLoc, 5854 MultiExprArg Args); 5855 5856 ExprResult BuildInstanceMessage(Expr *Receiver, 5857 QualType ReceiverType, 5858 SourceLocation SuperLoc, 5859 Selector Sel, 5860 ObjCMethodDecl *Method, 5861 SourceLocation LBracLoc, 5862 ArrayRef<SourceLocation> SelectorLocs, 5863 SourceLocation RBracLoc, 5864 MultiExprArg Args, 5865 bool isImplicit = false); 5866 5867 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5868 QualType ReceiverType, 5869 SourceLocation Loc, 5870 Selector Sel, 5871 ObjCMethodDecl *Method, 5872 MultiExprArg Args); 5873 5874 ExprResult ActOnInstanceMessage(Scope *S, 5875 Expr *Receiver, 5876 Selector Sel, 5877 SourceLocation LBracLoc, 5878 ArrayRef<SourceLocation> SelectorLocs, 5879 SourceLocation RBracLoc, 5880 MultiExprArg Args); 5881 5882 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5883 ObjCBridgeCastKind Kind, 5884 SourceLocation BridgeKeywordLoc, 5885 TypeSourceInfo *TSInfo, 5886 Expr *SubExpr); 5887 5888 ExprResult ActOnObjCBridgedCast(Scope *S, 5889 SourceLocation LParenLoc, 5890 ObjCBridgeCastKind Kind, 5891 SourceLocation BridgeKeywordLoc, 5892 ParsedType Type, 5893 SourceLocation RParenLoc, 5894 Expr *SubExpr); 5895 5896 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5897 5898 /// \brief Check whether the given new method is a valid override of the 5899 /// given overridden method, and set any properties that should be inherited. 5900 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5901 const ObjCMethodDecl *Overridden, 5902 bool IsImplementation); 5903 5904 /// \brief Check whether the given method overrides any methods in its class, 5905 /// calling \c CheckObjCMethodOverride for each overridden method. 5906 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5907 5908 enum PragmaOptionsAlignKind { 5909 POAK_Native, // #pragma options align=native 5910 POAK_Natural, // #pragma options align=natural 5911 POAK_Packed, // #pragma options align=packed 5912 POAK_Power, // #pragma options align=power 5913 POAK_Mac68k, // #pragma options align=mac68k 5914 POAK_Reset // #pragma options align=reset 5915 }; 5916 5917 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5918 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5919 SourceLocation PragmaLoc, 5920 SourceLocation KindLoc); 5921 5922 enum PragmaPackKind { 5923 PPK_Default, // #pragma pack([n]) 5924 PPK_Show, // #pragma pack(show), only supported by MSVC. 5925 PPK_Push, // #pragma pack(push, [identifier], [n]) 5926 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5927 }; 5928 5929 enum PragmaMSStructKind { 5930 PMSST_OFF, // #pragms ms_struct off 5931 PMSST_ON // #pragms ms_struct on 5932 }; 5933 5934 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5935 void ActOnPragmaPack(PragmaPackKind Kind, 5936 IdentifierInfo *Name, 5937 Expr *Alignment, 5938 SourceLocation PragmaLoc, 5939 SourceLocation LParenLoc, 5940 SourceLocation RParenLoc); 5941 5942 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5943 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5944 5945 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5946 void ActOnPragmaUnused(const Token &Identifier, 5947 Scope *curScope, 5948 SourceLocation PragmaLoc); 5949 5950 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5951 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5952 SourceLocation PragmaLoc); 5953 5954 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5955 SourceLocation Loc); 5956 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5957 5958 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5959 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5960 SourceLocation PragmaLoc, 5961 SourceLocation WeakNameLoc); 5962 5963 /// ActOnPragmaRedefineExtname - Called on well formed 5964 /// #pragma redefine_extname oldname newname. 5965 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 5966 IdentifierInfo* AliasName, 5967 SourceLocation PragmaLoc, 5968 SourceLocation WeakNameLoc, 5969 SourceLocation AliasNameLoc); 5970 5971 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5972 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5973 IdentifierInfo* AliasName, 5974 SourceLocation PragmaLoc, 5975 SourceLocation WeakNameLoc, 5976 SourceLocation AliasNameLoc); 5977 5978 /// ActOnPragmaFPContract - Called on well formed 5979 /// #pragma {STDC,OPENCL} FP_CONTRACT 5980 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5981 5982 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5983 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5984 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5985 5986 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5987 void AddMsStructLayoutForRecord(RecordDecl *RD); 5988 5989 /// FreePackedContext - Deallocate and null out PackContext. 5990 void FreePackedContext(); 5991 5992 /// PushNamespaceVisibilityAttr - Note that we've entered a 5993 /// namespace with a visibility attribute. 5994 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5995 SourceLocation Loc); 5996 5997 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5998 /// add an appropriate visibility attribute. 5999 void AddPushedVisibilityAttribute(Decl *RD); 6000 6001 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 6002 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 6003 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 6004 6005 /// FreeVisContext - Deallocate and null out VisContext. 6006 void FreeVisContext(); 6007 6008 /// AddCFAuditedAttribute - Check whether we're currently within 6009 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 6010 /// the appropriate attribute. 6011 void AddCFAuditedAttribute(Decl *D); 6012 6013 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 6014 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 6015 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 6016 6017 /// \brief The kind of conversion being performed. 6018 enum CheckedConversionKind { 6019 /// \brief An implicit conversion. 6020 CCK_ImplicitConversion, 6021 /// \brief A C-style cast. 6022 CCK_CStyleCast, 6023 /// \brief A functional-style cast. 6024 CCK_FunctionalCast, 6025 /// \brief A cast other than a C-style cast. 6026 CCK_OtherCast 6027 }; 6028 6029 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 6030 /// cast. If there is already an implicit cast, merge into the existing one. 6031 /// If isLvalue, the result of the cast is an lvalue. 6032 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 6033 ExprValueKind VK = VK_RValue, 6034 const CXXCastPath *BasePath = 0, 6035 CheckedConversionKind CCK 6036 = CCK_ImplicitConversion); 6037 6038 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 6039 /// to the conversion from scalar type ScalarTy to the Boolean type. 6040 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 6041 6042 /// IgnoredValueConversions - Given that an expression's result is 6043 /// syntactically ignored, perform any conversions that are 6044 /// required. 6045 ExprResult IgnoredValueConversions(Expr *E); 6046 6047 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 6048 // functions and arrays to their respective pointers (C99 6.3.2.1). 6049 ExprResult UsualUnaryConversions(Expr *E); 6050 6051 // DefaultFunctionArrayConversion - converts functions and arrays 6052 // to their respective pointers (C99 6.3.2.1). 6053 ExprResult DefaultFunctionArrayConversion(Expr *E); 6054 6055 // DefaultFunctionArrayLvalueConversion - converts functions and 6056 // arrays to their respective pointers and performs the 6057 // lvalue-to-rvalue conversion. 6058 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 6059 6060 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 6061 // the operand. This is DefaultFunctionArrayLvalueConversion, 6062 // except that it assumes the operand isn't of function or array 6063 // type. 6064 ExprResult DefaultLvalueConversion(Expr *E); 6065 6066 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 6067 // do not have a prototype. Integer promotions are performed on each 6068 // argument, and arguments that have type float are promoted to double. 6069 ExprResult DefaultArgumentPromotion(Expr *E); 6070 6071 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 6072 enum VariadicCallType { 6073 VariadicFunction, 6074 VariadicBlock, 6075 VariadicMethod, 6076 VariadicConstructor, 6077 VariadicDoesNotApply 6078 }; 6079 6080 /// GatherArgumentsForCall - Collector argument expressions for various 6081 /// form of call prototypes. 6082 bool GatherArgumentsForCall(SourceLocation CallLoc, 6083 FunctionDecl *FDecl, 6084 const FunctionProtoType *Proto, 6085 unsigned FirstProtoArg, 6086 Expr **Args, unsigned NumArgs, 6087 SmallVector<Expr *, 8> &AllArgs, 6088 VariadicCallType CallType = VariadicDoesNotApply, 6089 bool AllowExplicit = false); 6090 6091 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 6092 // will warn if the resulting type is not a POD type. 6093 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 6094 FunctionDecl *FDecl); 6095 6096 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 6097 // operands and then handles various conversions that are common to binary 6098 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 6099 // routine returns the first non-arithmetic type found. The client is 6100 // responsible for emitting appropriate error diagnostics. 6101 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 6102 bool IsCompAssign = false); 6103 6104 /// AssignConvertType - All of the 'assignment' semantic checks return this 6105 /// enum to indicate whether the assignment was allowed. These checks are 6106 /// done for simple assignments, as well as initialization, return from 6107 /// function, argument passing, etc. The query is phrased in terms of a 6108 /// source and destination type. 6109 enum AssignConvertType { 6110 /// Compatible - the types are compatible according to the standard. 6111 Compatible, 6112 6113 /// PointerToInt - The assignment converts a pointer to an int, which we 6114 /// accept as an extension. 6115 PointerToInt, 6116 6117 /// IntToPointer - The assignment converts an int to a pointer, which we 6118 /// accept as an extension. 6119 IntToPointer, 6120 6121 /// FunctionVoidPointer - The assignment is between a function pointer and 6122 /// void*, which the standard doesn't allow, but we accept as an extension. 6123 FunctionVoidPointer, 6124 6125 /// IncompatiblePointer - The assignment is between two pointers types that 6126 /// are not compatible, but we accept them as an extension. 6127 IncompatiblePointer, 6128 6129 /// IncompatiblePointer - The assignment is between two pointers types which 6130 /// point to integers which have a different sign, but are otherwise 6131 /// identical. This is a subset of the above, but broken out because it's by 6132 /// far the most common case of incompatible pointers. 6133 IncompatiblePointerSign, 6134 6135 /// CompatiblePointerDiscardsQualifiers - The assignment discards 6136 /// c/v/r qualifiers, which we accept as an extension. 6137 CompatiblePointerDiscardsQualifiers, 6138 6139 /// IncompatiblePointerDiscardsQualifiers - The assignment 6140 /// discards qualifiers that we don't permit to be discarded, 6141 /// like address spaces. 6142 IncompatiblePointerDiscardsQualifiers, 6143 6144 /// IncompatibleNestedPointerQualifiers - The assignment is between two 6145 /// nested pointer types, and the qualifiers other than the first two 6146 /// levels differ e.g. char ** -> const char **, but we accept them as an 6147 /// extension. 6148 IncompatibleNestedPointerQualifiers, 6149 6150 /// IncompatibleVectors - The assignment is between two vector types that 6151 /// have the same size, which we accept as an extension. 6152 IncompatibleVectors, 6153 6154 /// IntToBlockPointer - The assignment converts an int to a block 6155 /// pointer. We disallow this. 6156 IntToBlockPointer, 6157 6158 /// IncompatibleBlockPointer - The assignment is between two block 6159 /// pointers types that are not compatible. 6160 IncompatibleBlockPointer, 6161 6162 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6163 /// id type and something else (that is incompatible with it). For example, 6164 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6165 IncompatibleObjCQualifiedId, 6166 6167 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6168 /// object with __weak qualifier. 6169 IncompatibleObjCWeakRef, 6170 6171 /// Incompatible - We reject this conversion outright, it is invalid to 6172 /// represent it in the AST. 6173 Incompatible 6174 }; 6175 6176 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6177 /// assignment conversion type specified by ConvTy. This returns true if the 6178 /// conversion was invalid or false if the conversion was accepted. 6179 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6180 SourceLocation Loc, 6181 QualType DstType, QualType SrcType, 6182 Expr *SrcExpr, AssignmentAction Action, 6183 bool *Complained = 0); 6184 6185 /// CheckAssignmentConstraints - Perform type checking for assignment, 6186 /// argument passing, variable initialization, and function return values. 6187 /// C99 6.5.16. 6188 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6189 QualType LHSType, 6190 QualType RHSType); 6191 6192 /// Check assignment constraints and prepare for a conversion of the 6193 /// RHS to the LHS type. 6194 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6195 ExprResult &RHS, 6196 CastKind &Kind); 6197 6198 // CheckSingleAssignmentConstraints - Currently used by 6199 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6200 // this routine performs the default function/array converions. 6201 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6202 ExprResult &RHS, 6203 bool Diagnose = true); 6204 6205 // \brief If the lhs type is a transparent union, check whether we 6206 // can initialize the transparent union with the given expression. 6207 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6208 ExprResult &RHS); 6209 6210 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6211 6212 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6213 6214 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6215 AssignmentAction Action, 6216 bool AllowExplicit = false); 6217 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6218 AssignmentAction Action, 6219 bool AllowExplicit, 6220 ImplicitConversionSequence& ICS); 6221 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6222 const ImplicitConversionSequence& ICS, 6223 AssignmentAction Action, 6224 CheckedConversionKind CCK 6225 = CCK_ImplicitConversion); 6226 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6227 const StandardConversionSequence& SCS, 6228 AssignmentAction Action, 6229 CheckedConversionKind CCK); 6230 6231 /// the following "Check" methods will return a valid/converted QualType 6232 /// or a null QualType (indicating an error diagnostic was issued). 6233 6234 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6235 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6236 ExprResult &RHS); 6237 QualType CheckPointerToMemberOperands( // C++ 5.5 6238 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6239 SourceLocation OpLoc, bool isIndirect); 6240 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6241 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6242 bool IsDivide); 6243 QualType CheckRemainderOperands( // C99 6.5.5 6244 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6245 bool IsCompAssign = false); 6246 QualType CheckAdditionOperands( // C99 6.5.6 6247 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6248 QualType* CompLHSTy = 0); 6249 QualType CheckSubtractionOperands( // C99 6.5.6 6250 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6251 QualType* CompLHSTy = 0); 6252 QualType CheckShiftOperands( // C99 6.5.7 6253 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6254 bool IsCompAssign = false); 6255 QualType CheckCompareOperands( // C99 6.5.8/9 6256 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6257 bool isRelational); 6258 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6259 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6260 bool IsCompAssign = false); 6261 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6262 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6263 // CheckAssignmentOperands is used for both simple and compound assignment. 6264 // For simple assignment, pass both expressions and a null converted type. 6265 // For compound assignment, pass both expressions and the converted type. 6266 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6267 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6268 6269 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6270 UnaryOperatorKind Opcode, Expr *Op); 6271 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6272 BinaryOperatorKind Opcode, 6273 Expr *LHS, Expr *RHS); 6274 ExprResult checkPseudoObjectRValue(Expr *E); 6275 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6276 6277 QualType CheckConditionalOperands( // C99 6.5.15 6278 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6279 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6280 QualType CXXCheckConditionalOperands( // C++ 5.16 6281 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6282 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6283 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6284 bool *NonStandardCompositeType = 0); 6285 QualType FindCompositePointerType(SourceLocation Loc, 6286 ExprResult &E1, ExprResult &E2, 6287 bool *NonStandardCompositeType = 0) { 6288 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6289 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6290 NonStandardCompositeType); 6291 E1 = Owned(E1Tmp); 6292 E2 = Owned(E2Tmp); 6293 return Composite; 6294 } 6295 6296 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6297 SourceLocation QuestionLoc); 6298 6299 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6300 SourceLocation QuestionLoc); 6301 6302 /// type checking for vector binary operators. 6303 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6304 SourceLocation Loc, bool IsCompAssign); 6305 QualType GetSignedVectorType(QualType V); 6306 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6307 SourceLocation Loc, bool isRelational); 6308 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6309 SourceLocation Loc); 6310 6311 /// type checking declaration initializers (C99 6.7.8) 6312 bool CheckForConstantInitializer(Expr *e, QualType t); 6313 6314 // type checking C++ declaration initializers (C++ [dcl.init]). 6315 6316 /// ReferenceCompareResult - Expresses the result of comparing two 6317 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6318 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6319 enum ReferenceCompareResult { 6320 /// Ref_Incompatible - The two types are incompatible, so direct 6321 /// reference binding is not possible. 6322 Ref_Incompatible = 0, 6323 /// Ref_Related - The two types are reference-related, which means 6324 /// that their unqualified forms (T1 and T2) are either the same 6325 /// or T1 is a base class of T2. 6326 Ref_Related, 6327 /// Ref_Compatible_With_Added_Qualification - The two types are 6328 /// reference-compatible with added qualification, meaning that 6329 /// they are reference-compatible and the qualifiers on T1 (cv1) 6330 /// are greater than the qualifiers on T2 (cv2). 6331 Ref_Compatible_With_Added_Qualification, 6332 /// Ref_Compatible - The two types are reference-compatible and 6333 /// have equivalent qualifiers (cv1 == cv2). 6334 Ref_Compatible 6335 }; 6336 6337 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6338 QualType T1, QualType T2, 6339 bool &DerivedToBase, 6340 bool &ObjCConversion, 6341 bool &ObjCLifetimeConversion); 6342 6343 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6344 Expr *CastExpr, CastKind &CastKind, 6345 ExprValueKind &VK, CXXCastPath &Path); 6346 6347 /// \brief Force an expression with unknown-type to an expression of the 6348 /// given type. 6349 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6350 6351 // CheckVectorCast - check type constraints for vectors. 6352 // Since vectors are an extension, there are no C standard reference for this. 6353 // We allow casting between vectors and integer datatypes of the same size. 6354 // returns true if the cast is invalid 6355 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6356 CastKind &Kind); 6357 6358 // CheckExtVectorCast - check type constraints for extended vectors. 6359 // Since vectors are an extension, there are no C standard reference for this. 6360 // We allow casting between vectors and integer datatypes of the same size, 6361 // or vectors and the element type of that vector. 6362 // returns the cast expr 6363 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6364 CastKind &Kind); 6365 6366 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6367 SourceLocation LParenLoc, 6368 Expr *CastExpr, 6369 SourceLocation RParenLoc); 6370 6371 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6372 6373 /// \brief Checks for invalid conversions and casts between 6374 /// retainable pointers and other pointer kinds. 6375 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6376 QualType castType, Expr *&op, 6377 CheckedConversionKind CCK); 6378 6379 Expr *stripARCUnbridgedCast(Expr *e); 6380 void diagnoseARCUnbridgedCast(Expr *e); 6381 6382 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6383 QualType ExprType); 6384 6385 /// checkRetainCycles - Check whether an Objective-C message send 6386 /// might create an obvious retain cycle. 6387 void checkRetainCycles(ObjCMessageExpr *msg); 6388 void checkRetainCycles(Expr *receiver, Expr *argument); 6389 6390 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6391 /// to weak/__unsafe_unretained type. 6392 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6393 6394 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6395 /// to weak/__unsafe_unretained expression. 6396 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6397 6398 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6399 /// \param Method - May be null. 6400 /// \param [out] ReturnType - The return type of the send. 6401 /// \return true iff there were any incompatible types. 6402 bool CheckMessageArgumentTypes(QualType ReceiverType, 6403 Expr **Args, unsigned NumArgs, Selector Sel, 6404 ObjCMethodDecl *Method, bool isClassMessage, 6405 bool isSuperMessage, 6406 SourceLocation lbrac, SourceLocation rbrac, 6407 QualType &ReturnType, ExprValueKind &VK); 6408 6409 /// \brief Determine the result of a message send expression based on 6410 /// the type of the receiver, the method expected to receive the message, 6411 /// and the form of the message send. 6412 QualType getMessageSendResultType(QualType ReceiverType, 6413 ObjCMethodDecl *Method, 6414 bool isClassMessage, bool isSuperMessage); 6415 6416 /// \brief If the given expression involves a message send to a method 6417 /// with a related result type, emit a note describing what happened. 6418 void EmitRelatedResultTypeNote(const Expr *E); 6419 6420 /// CheckBooleanCondition - Diagnose problems involving the use of 6421 /// the given expression as a boolean condition (e.g. in an if 6422 /// statement). Also performs the standard function and array 6423 /// decays, possibly changing the input variable. 6424 /// 6425 /// \param Loc - A location associated with the condition, e.g. the 6426 /// 'if' keyword. 6427 /// \return true iff there were any errors 6428 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6429 6430 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6431 Expr *SubExpr); 6432 6433 /// DiagnoseAssignmentAsCondition - Given that an expression is 6434 /// being used as a boolean condition, warn if it's an assignment. 6435 void DiagnoseAssignmentAsCondition(Expr *E); 6436 6437 /// \brief Redundant parentheses over an equality comparison can indicate 6438 /// that the user intended an assignment used as condition. 6439 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6440 6441 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6442 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6443 6444 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6445 /// the specified width and sign. If an overflow occurs, detect it and emit 6446 /// the specified diagnostic. 6447 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6448 unsigned NewWidth, bool NewSign, 6449 SourceLocation Loc, unsigned DiagID); 6450 6451 /// Checks that the Objective-C declaration is declared in the global scope. 6452 /// Emits an error and marks the declaration as invalid if it's not declared 6453 /// in the global scope. 6454 bool CheckObjCDeclScope(Decl *D); 6455 6456 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6457 /// and reports the appropriate diagnostics. Returns false on success. 6458 /// Can optionally return the value of the expression. 6459 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6460 PartialDiagnostic Diag, 6461 bool AllowFold, 6462 PartialDiagnostic FoldDiag); 6463 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6464 PartialDiagnostic Diag, 6465 bool AllowFold = true) { 6466 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6467 PDiag(0)); 6468 } 6469 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6470 6471 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6472 /// the correct width, and that the field type is valid. 6473 /// Returns false on success. 6474 /// Can optionally return whether the bit-field is of width 0 6475 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6476 QualType FieldTy, Expr *BitWidth, 6477 bool *ZeroWidth = 0); 6478 6479 enum CUDAFunctionTarget { 6480 CFT_Device, 6481 CFT_Global, 6482 CFT_Host, 6483 CFT_HostDevice 6484 }; 6485 6486 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6487 6488 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6489 CUDAFunctionTarget CalleeTarget); 6490 6491 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6492 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6493 IdentifyCUDATarget(Callee)); 6494 } 6495 6496 /// \name Code completion 6497 //@{ 6498 /// \brief Describes the context in which code completion occurs. 6499 enum ParserCompletionContext { 6500 /// \brief Code completion occurs at top-level or namespace context. 6501 PCC_Namespace, 6502 /// \brief Code completion occurs within a class, struct, or union. 6503 PCC_Class, 6504 /// \brief Code completion occurs within an Objective-C interface, protocol, 6505 /// or category. 6506 PCC_ObjCInterface, 6507 /// \brief Code completion occurs within an Objective-C implementation or 6508 /// category implementation 6509 PCC_ObjCImplementation, 6510 /// \brief Code completion occurs within the list of instance variables 6511 /// in an Objective-C interface, protocol, category, or implementation. 6512 PCC_ObjCInstanceVariableList, 6513 /// \brief Code completion occurs following one or more template 6514 /// headers. 6515 PCC_Template, 6516 /// \brief Code completion occurs following one or more template 6517 /// headers within a class. 6518 PCC_MemberTemplate, 6519 /// \brief Code completion occurs within an expression. 6520 PCC_Expression, 6521 /// \brief Code completion occurs within a statement, which may 6522 /// also be an expression or a declaration. 6523 PCC_Statement, 6524 /// \brief Code completion occurs at the beginning of the 6525 /// initialization statement (or expression) in a for loop. 6526 PCC_ForInit, 6527 /// \brief Code completion occurs within the condition of an if, 6528 /// while, switch, or for statement. 6529 PCC_Condition, 6530 /// \brief Code completion occurs within the body of a function on a 6531 /// recovery path, where we do not have a specific handle on our position 6532 /// in the grammar. 6533 PCC_RecoveryInFunction, 6534 /// \brief Code completion occurs where only a type is permitted. 6535 PCC_Type, 6536 /// \brief Code completion occurs in a parenthesized expression, which 6537 /// might also be a type cast. 6538 PCC_ParenthesizedExpression, 6539 /// \brief Code completion occurs within a sequence of declaration 6540 /// specifiers within a function, method, or block. 6541 PCC_LocalDeclarationSpecifiers 6542 }; 6543 6544 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6545 void CodeCompleteOrdinaryName(Scope *S, 6546 ParserCompletionContext CompletionContext); 6547 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6548 bool AllowNonIdentifiers, 6549 bool AllowNestedNameSpecifiers); 6550 6551 struct CodeCompleteExpressionData; 6552 void CodeCompleteExpression(Scope *S, 6553 const CodeCompleteExpressionData &Data); 6554 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6555 SourceLocation OpLoc, 6556 bool IsArrow); 6557 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6558 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6559 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6560 void CodeCompleteCase(Scope *S); 6561 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6562 void CodeCompleteInitializer(Scope *S, Decl *D); 6563 void CodeCompleteReturn(Scope *S); 6564 void CodeCompleteAfterIf(Scope *S); 6565 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6566 6567 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6568 bool EnteringContext); 6569 void CodeCompleteUsing(Scope *S); 6570 void CodeCompleteUsingDirective(Scope *S); 6571 void CodeCompleteNamespaceDecl(Scope *S); 6572 void CodeCompleteNamespaceAliasDecl(Scope *S); 6573 void CodeCompleteOperatorName(Scope *S); 6574 void CodeCompleteConstructorInitializer(Decl *Constructor, 6575 CXXCtorInitializer** Initializers, 6576 unsigned NumInitializers); 6577 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6578 bool AfterAmpersand); 6579 6580 void CodeCompleteObjCAtDirective(Scope *S); 6581 void CodeCompleteObjCAtVisibility(Scope *S); 6582 void CodeCompleteObjCAtStatement(Scope *S); 6583 void CodeCompleteObjCAtExpression(Scope *S); 6584 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6585 void CodeCompleteObjCPropertyGetter(Scope *S); 6586 void CodeCompleteObjCPropertySetter(Scope *S); 6587 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6588 bool IsParameter); 6589 void CodeCompleteObjCMessageReceiver(Scope *S); 6590 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6591 IdentifierInfo **SelIdents, 6592 unsigned NumSelIdents, 6593 bool AtArgumentExpression); 6594 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6595 IdentifierInfo **SelIdents, 6596 unsigned NumSelIdents, 6597 bool AtArgumentExpression, 6598 bool IsSuper = false); 6599 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6600 IdentifierInfo **SelIdents, 6601 unsigned NumSelIdents, 6602 bool AtArgumentExpression, 6603 ObjCInterfaceDecl *Super = 0); 6604 void CodeCompleteObjCForCollection(Scope *S, 6605 DeclGroupPtrTy IterationVar); 6606 void CodeCompleteObjCSelector(Scope *S, 6607 IdentifierInfo **SelIdents, 6608 unsigned NumSelIdents); 6609 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6610 unsigned NumProtocols); 6611 void CodeCompleteObjCProtocolDecl(Scope *S); 6612 void CodeCompleteObjCInterfaceDecl(Scope *S); 6613 void CodeCompleteObjCSuperclass(Scope *S, 6614 IdentifierInfo *ClassName, 6615 SourceLocation ClassNameLoc); 6616 void CodeCompleteObjCImplementationDecl(Scope *S); 6617 void CodeCompleteObjCInterfaceCategory(Scope *S, 6618 IdentifierInfo *ClassName, 6619 SourceLocation ClassNameLoc); 6620 void CodeCompleteObjCImplementationCategory(Scope *S, 6621 IdentifierInfo *ClassName, 6622 SourceLocation ClassNameLoc); 6623 void CodeCompleteObjCPropertyDefinition(Scope *S); 6624 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6625 IdentifierInfo *PropertyName); 6626 void CodeCompleteObjCMethodDecl(Scope *S, 6627 bool IsInstanceMethod, 6628 ParsedType ReturnType); 6629 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6630 bool IsInstanceMethod, 6631 bool AtParameterName, 6632 ParsedType ReturnType, 6633 IdentifierInfo **SelIdents, 6634 unsigned NumSelIdents); 6635 void CodeCompletePreprocessorDirective(bool InConditional); 6636 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6637 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6638 void CodeCompletePreprocessorExpression(); 6639 void CodeCompletePreprocessorMacroArgument(Scope *S, 6640 IdentifierInfo *Macro, 6641 MacroInfo *MacroInfo, 6642 unsigned Argument); 6643 void CodeCompleteNaturalLanguage(); 6644 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6645 SmallVectorImpl<CodeCompletionResult> &Results); 6646 //@} 6647 6648 //===--------------------------------------------------------------------===// 6649 // Extra semantic analysis beyond the C type system 6650 6651public: 6652 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6653 unsigned ByteNo) const; 6654 6655private: 6656 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6657 const ArraySubscriptExpr *ASE=0, 6658 bool AllowOnePastEnd=true, bool IndexNegated=false); 6659 void CheckArrayAccess(const Expr *E); 6660 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6661 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6662 Expr **Args, unsigned NumArgs); 6663 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6664 6665 bool CheckObjCString(Expr *Arg); 6666 6667 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6668 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6669 6670 bool SemaBuiltinVAStart(CallExpr *TheCall); 6671 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6672 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6673 6674public: 6675 // Used by C++ template instantiation. 6676 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6677 6678private: 6679 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6680 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6681 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6682 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6683 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6684 AtomicExpr::AtomicOp Op); 6685 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6686 llvm::APSInt &Result); 6687 6688 enum FormatStringType { 6689 FST_Scanf, 6690 FST_Printf, 6691 FST_NSString, 6692 FST_Strftime, 6693 FST_Strfmon, 6694 FST_Kprintf, 6695 FST_Unknown 6696 }; 6697 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6698 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6699 bool HasVAListArg, unsigned format_idx, 6700 unsigned firstDataArg, FormatStringType Type, 6701 bool inFunctionCall = true); 6702 6703 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6704 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6705 unsigned format_idx, unsigned firstDataArg, 6706 FormatStringType Type, bool inFunctionCall); 6707 6708 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6709 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6710 unsigned NumArgs, bool IsCXXMember, 6711 SourceLocation Loc, SourceRange Range); 6712 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6713 bool HasVAListArg, unsigned format_idx, 6714 unsigned firstDataArg, FormatStringType Type, 6715 SourceLocation Loc, SourceRange range); 6716 6717 void CheckNonNullArguments(const NonNullAttr *NonNull, 6718 const Expr * const *ExprArgs, 6719 SourceLocation CallSiteLoc); 6720 6721 void CheckMemaccessArguments(const CallExpr *Call, 6722 unsigned BId, 6723 IdentifierInfo *FnName); 6724 6725 void CheckStrlcpycatArguments(const CallExpr *Call, 6726 IdentifierInfo *FnName); 6727 6728 void CheckStrncatArguments(const CallExpr *Call, 6729 IdentifierInfo *FnName); 6730 6731 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6732 SourceLocation ReturnLoc); 6733 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6734 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6735 6736 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6737 Expr *Init); 6738 6739 /// \brief The parser's current scope. 6740 /// 6741 /// The parser maintains this state here. 6742 Scope *CurScope; 6743 6744protected: 6745 friend class Parser; 6746 friend class InitializationSequence; 6747 friend class ASTReader; 6748 friend class ASTWriter; 6749 6750public: 6751 /// \brief Retrieve the parser's current scope. 6752 /// 6753 /// This routine must only be used when it is certain that semantic analysis 6754 /// and the parser are in precisely the same context, which is not the case 6755 /// when, e.g., we are performing any kind of template instantiation. 6756 /// Therefore, the only safe places to use this scope are in the parser 6757 /// itself and in routines directly invoked from the parser and *never* from 6758 /// template substitution or instantiation. 6759 Scope *getCurScope() const { return CurScope; } 6760 6761 Decl *getObjCDeclContext() const; 6762 6763 DeclContext *getCurLexicalContext() const { 6764 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6765 } 6766 6767 AvailabilityResult getCurContextAvailability() const; 6768}; 6769 6770/// \brief RAII object that enters a new expression evaluation context. 6771class EnterExpressionEvaluationContext { 6772 Sema &Actions; 6773 6774public: 6775 EnterExpressionEvaluationContext(Sema &Actions, 6776 Sema::ExpressionEvaluationContext NewContext, 6777 Decl *LambdaContextDecl = 0, 6778 bool IsDecltype = false) 6779 : Actions(Actions) { 6780 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6781 IsDecltype); 6782 } 6783 6784 ~EnterExpressionEvaluationContext() { 6785 Actions.PopExpressionEvaluationContext(); 6786 } 6787}; 6788 6789} // end namespace clang 6790 6791#endif 6792