Sema.h revision 9fcce65e7e1307b5b8da9be13e4092d6bb94dc1d
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/ExprObjC.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/AST/NSAPI.h" 33#include "clang/Lex/ModuleLoader.h" 34#include "clang/Basic/Specifiers.h" 35#include "clang/Basic/TemplateKinds.h" 36#include "clang/Basic/TypeTraits.h" 37#include "clang/Basic/ExpressionTraits.h" 38#include "llvm/ADT/ArrayRef.h" 39#include "llvm/ADT/OwningPtr.h" 40#include "llvm/ADT/SmallPtrSet.h" 41#include "llvm/ADT/SmallVector.h" 42#include <deque> 43#include <string> 44 45namespace llvm { 46 class APSInt; 47 template <typename ValueT> struct DenseMapInfo; 48 template <typename ValueT, typename ValueInfoT> class DenseSet; 49 class SmallBitVector; 50} 51 52namespace clang { 53 class ADLResult; 54 class ASTConsumer; 55 class ASTContext; 56 class ASTMutationListener; 57 class ASTReader; 58 class ASTWriter; 59 class ArrayType; 60 class AttributeList; 61 class BlockDecl; 62 class CXXBasePath; 63 class CXXBasePaths; 64 class CXXBindTemporaryExpr; 65 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 66 class CXXConstructorDecl; 67 class CXXConversionDecl; 68 class CXXDestructorDecl; 69 class CXXFieldCollector; 70 class CXXMemberCallExpr; 71 class CXXMethodDecl; 72 class CXXScopeSpec; 73 class CXXTemporary; 74 class CXXTryStmt; 75 class CallExpr; 76 class ClassTemplateDecl; 77 class ClassTemplatePartialSpecializationDecl; 78 class ClassTemplateSpecializationDecl; 79 class CodeCompleteConsumer; 80 class CodeCompletionAllocator; 81 class CodeCompletionResult; 82 class Decl; 83 class DeclAccessPair; 84 class DeclContext; 85 class DeclRefExpr; 86 class DeclaratorDecl; 87 class DeducedTemplateArgument; 88 class DependentDiagnostic; 89 class DesignatedInitExpr; 90 class Designation; 91 class EnumConstantDecl; 92 class Expr; 93 class ExtVectorType; 94 class ExternalSemaSource; 95 class FormatAttr; 96 class FriendDecl; 97 class FunctionDecl; 98 class FunctionProtoType; 99 class FunctionTemplateDecl; 100 class ImplicitConversionSequence; 101 class InitListExpr; 102 class InitializationKind; 103 class InitializationSequence; 104 class InitializedEntity; 105 class IntegerLiteral; 106 class LabelStmt; 107 class LambdaExpr; 108 class LangOptions; 109 class LocalInstantiationScope; 110 class LookupResult; 111 class MacroInfo; 112 class MultiLevelTemplateArgumentList; 113 class NamedDecl; 114 class NonNullAttr; 115 class ObjCCategoryDecl; 116 class ObjCCategoryImplDecl; 117 class ObjCCompatibleAliasDecl; 118 class ObjCContainerDecl; 119 class ObjCImplDecl; 120 class ObjCImplementationDecl; 121 class ObjCInterfaceDecl; 122 class ObjCIvarDecl; 123 template <class T> class ObjCList; 124 class ObjCMessageExpr; 125 class ObjCMethodDecl; 126 class ObjCPropertyDecl; 127 class ObjCProtocolDecl; 128 class OverloadCandidateSet; 129 class OverloadExpr; 130 class ParenListExpr; 131 class ParmVarDecl; 132 class Preprocessor; 133 class PseudoDestructorTypeStorage; 134 class PseudoObjectExpr; 135 class QualType; 136 class StandardConversionSequence; 137 class Stmt; 138 class StringLiteral; 139 class SwitchStmt; 140 class TargetAttributesSema; 141 class TemplateArgument; 142 class TemplateArgumentList; 143 class TemplateArgumentLoc; 144 class TemplateDecl; 145 class TemplateParameterList; 146 class TemplatePartialOrderingContext; 147 class TemplateTemplateParmDecl; 148 class Token; 149 class TypeAliasDecl; 150 class TypedefDecl; 151 class TypedefNameDecl; 152 class TypeLoc; 153 class UnqualifiedId; 154 class UnresolvedLookupExpr; 155 class UnresolvedMemberExpr; 156 class UnresolvedSetImpl; 157 class UnresolvedSetIterator; 158 class UsingDecl; 159 class UsingShadowDecl; 160 class ValueDecl; 161 class VarDecl; 162 class VisibilityAttr; 163 class VisibleDeclConsumer; 164 class IndirectFieldDecl; 165 166namespace sema { 167 class AccessedEntity; 168 class BlockScopeInfo; 169 class CompoundScopeInfo; 170 class DelayedDiagnostic; 171 class FunctionScopeInfo; 172 class LambdaScopeInfo; 173 class PossiblyUnreachableDiag; 174 class TemplateDeductionInfo; 175} 176 177// FIXME: No way to easily map from TemplateTypeParmTypes to 178// TemplateTypeParmDecls, so we have this horrible PointerUnion. 179typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 180 SourceLocation> UnexpandedParameterPack; 181 182/// Sema - This implements semantic analysis and AST building for C. 183class Sema { 184 Sema(const Sema&); // DO NOT IMPLEMENT 185 void operator=(const Sema&); // DO NOT IMPLEMENT 186 mutable const TargetAttributesSema* TheTargetAttributesSema; 187public: 188 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 189 typedef OpaquePtr<TemplateName> TemplateTy; 190 typedef OpaquePtr<QualType> TypeTy; 191 192 OpenCLOptions OpenCLFeatures; 193 FPOptions FPFeatures; 194 195 const LangOptions &LangOpts; 196 Preprocessor &PP; 197 ASTContext &Context; 198 ASTConsumer &Consumer; 199 DiagnosticsEngine &Diags; 200 SourceManager &SourceMgr; 201 202 /// \brief Flag indicating whether or not to collect detailed statistics. 203 bool CollectStats; 204 205 /// \brief Source of additional semantic information. 206 ExternalSemaSource *ExternalSource; 207 208 /// \brief Code-completion consumer. 209 CodeCompleteConsumer *CodeCompleter; 210 211 /// CurContext - This is the current declaration context of parsing. 212 DeclContext *CurContext; 213 214 /// \brief Generally null except when we temporarily switch decl contexts, 215 /// like in \see ActOnObjCTemporaryExitContainerContext. 216 DeclContext *OriginalLexicalContext; 217 218 /// VAListTagName - The declaration name corresponding to __va_list_tag. 219 /// This is used as part of a hack to omit that class from ADL results. 220 DeclarationName VAListTagName; 221 222 /// PackContext - Manages the stack for #pragma pack. An alignment 223 /// of 0 indicates default alignment. 224 void *PackContext; // Really a "PragmaPackStack*" 225 226 bool MSStructPragmaOn; // True when #pragma ms_struct on 227 228 /// VisContext - Manages the stack for #pragma GCC visibility. 229 void *VisContext; // Really a "PragmaVisStack*" 230 231 /// ExprNeedsCleanups - True if the current evaluation context 232 /// requires cleanups to be run at its conclusion. 233 bool ExprNeedsCleanups; 234 235 /// ExprCleanupObjects - This is the stack of objects requiring 236 /// cleanup that are created by the current full expression. The 237 /// element type here is ExprWithCleanups::Object. 238 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 239 240 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 241 242 /// \brief Stack containing information about each of the nested 243 /// function, block, and method scopes that are currently active. 244 /// 245 /// This array is never empty. Clients should ignore the first 246 /// element, which is used to cache a single FunctionScopeInfo 247 /// that's used to parse every top-level function. 248 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 249 250 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 251 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 252 ExtVectorDeclsType; 253 254 /// ExtVectorDecls - This is a list all the extended vector types. This allows 255 /// us to associate a raw vector type with one of the ext_vector type names. 256 /// This is only necessary for issuing pretty diagnostics. 257 ExtVectorDeclsType ExtVectorDecls; 258 259 /// \brief The set of types for which we have already complained about the 260 /// definitions being hidden. 261 /// 262 /// This set is used to suppress redundant diagnostics. 263 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 264 265 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 266 OwningPtr<CXXFieldCollector> FieldCollector; 267 268 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 269 270 /// PureVirtualClassDiagSet - a set of class declarations which we have 271 /// emitted a list of pure virtual functions. Used to prevent emitting the 272 /// same list more than once. 273 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 274 275 /// ParsingInitForAutoVars - a set of declarations with auto types for which 276 /// we are currently parsing the initializer. 277 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 278 279 /// \brief A mapping from external names to the most recent 280 /// locally-scoped external declaration with that name. 281 /// 282 /// This map contains external declarations introduced in local 283 /// scoped, e.g., 284 /// 285 /// \code 286 /// void f() { 287 /// void foo(int, int); 288 /// } 289 /// \endcode 290 /// 291 /// Here, the name "foo" will be associated with the declaration on 292 /// "foo" within f. This name is not visible outside of 293 /// "f". However, we still find it in two cases: 294 /// 295 /// - If we are declaring another external with the name "foo", we 296 /// can find "foo" as a previous declaration, so that the types 297 /// of this external declaration can be checked for 298 /// compatibility. 299 /// 300 /// - If we would implicitly declare "foo" (e.g., due to a call to 301 /// "foo" in C when no prototype or definition is visible), then 302 /// we find this declaration of "foo" and complain that it is 303 /// not visible. 304 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 305 306 /// \brief Look for a locally scoped external declaration by the given name. 307 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 308 findLocallyScopedExternalDecl(DeclarationName Name); 309 310 typedef LazyVector<VarDecl *, ExternalSemaSource, 311 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 312 TentativeDefinitionsType; 313 314 /// \brief All the tentative definitions encountered in the TU. 315 TentativeDefinitionsType TentativeDefinitions; 316 317 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 318 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 319 UnusedFileScopedDeclsType; 320 321 /// \brief The set of file scoped decls seen so far that have not been used 322 /// and must warn if not used. Only contains the first declaration. 323 UnusedFileScopedDeclsType UnusedFileScopedDecls; 324 325 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 326 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 327 DelegatingCtorDeclsType; 328 329 /// \brief All the delegating constructors seen so far in the file, used for 330 /// cycle detection at the end of the TU. 331 DelegatingCtorDeclsType DelegatingCtorDecls; 332 333 /// \brief All the overriding destructors seen during a class definition 334 /// (there could be multiple due to nested classes) that had their exception 335 /// spec checks delayed, plus the overridden destructor. 336 SmallVector<std::pair<const CXXDestructorDecl*, 337 const CXXDestructorDecl*>, 2> 338 DelayedDestructorExceptionSpecChecks; 339 340 /// \brief Callback to the parser to parse templated functions when needed. 341 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 342 LateTemplateParserCB *LateTemplateParser; 343 void *OpaqueParser; 344 345 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 346 LateTemplateParser = LTP; 347 OpaqueParser = P; 348 } 349 350 class DelayedDiagnostics; 351 352 class ParsingDeclState { 353 unsigned SavedStackSize; 354 friend class Sema::DelayedDiagnostics; 355 }; 356 357 class ProcessingContextState { 358 unsigned SavedParsingDepth; 359 unsigned SavedActiveStackBase; 360 friend class Sema::DelayedDiagnostics; 361 }; 362 363 /// A class which encapsulates the logic for delaying diagnostics 364 /// during parsing and other processing. 365 class DelayedDiagnostics { 366 /// \brief The stack of diagnostics that were delayed due to being 367 /// produced during the parsing of a declaration. 368 sema::DelayedDiagnostic *Stack; 369 370 /// \brief The number of objects on the delayed-diagnostics stack. 371 unsigned StackSize; 372 373 /// \brief The current capacity of the delayed-diagnostics stack. 374 unsigned StackCapacity; 375 376 /// \brief The index of the first "active" delayed diagnostic in 377 /// the stack. When parsing class definitions, we ignore active 378 /// delayed diagnostics from the surrounding context. 379 unsigned ActiveStackBase; 380 381 /// \brief The depth of the declarations we're currently parsing. 382 /// This gets saved and reset whenever we enter a class definition. 383 unsigned ParsingDepth; 384 385 public: 386 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 387 ActiveStackBase(0), ParsingDepth(0) {} 388 389 ~DelayedDiagnostics() { 390 delete[] reinterpret_cast<char*>(Stack); 391 } 392 393 /// Adds a delayed diagnostic. 394 void add(const sema::DelayedDiagnostic &diag); 395 396 /// Determines whether diagnostics should be delayed. 397 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 398 399 /// Observe that we've started parsing a declaration. Access and 400 /// deprecation diagnostics will be delayed; when the declaration 401 /// is completed, all active delayed diagnostics will be evaluated 402 /// in its context, and then active diagnostics stack will be 403 /// popped down to the saved depth. 404 ParsingDeclState pushParsingDecl() { 405 ParsingDepth++; 406 407 ParsingDeclState state; 408 state.SavedStackSize = StackSize; 409 return state; 410 } 411 412 /// Observe that we're completed parsing a declaration. 413 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 414 415 /// Observe that we've started processing a different context, the 416 /// contents of which are semantically separate from the 417 /// declarations it may lexically appear in. This sets aside the 418 /// current stack of active diagnostics and starts afresh. 419 ProcessingContextState pushContext() { 420 assert(StackSize >= ActiveStackBase); 421 422 ProcessingContextState state; 423 state.SavedParsingDepth = ParsingDepth; 424 state.SavedActiveStackBase = ActiveStackBase; 425 426 ActiveStackBase = StackSize; 427 ParsingDepth = 0; 428 429 return state; 430 } 431 432 /// Observe that we've stopped processing a context. This 433 /// restores the previous stack of active diagnostics. 434 void popContext(ProcessingContextState state) { 435 assert(ActiveStackBase == StackSize); 436 assert(ParsingDepth == 0); 437 ActiveStackBase = state.SavedActiveStackBase; 438 ParsingDepth = state.SavedParsingDepth; 439 } 440 } DelayedDiagnostics; 441 442 /// A RAII object to temporarily push a declaration context. 443 class ContextRAII { 444 private: 445 Sema &S; 446 DeclContext *SavedContext; 447 ProcessingContextState SavedContextState; 448 449 public: 450 ContextRAII(Sema &S, DeclContext *ContextToPush) 451 : S(S), SavedContext(S.CurContext), 452 SavedContextState(S.DelayedDiagnostics.pushContext()) 453 { 454 assert(ContextToPush && "pushing null context"); 455 S.CurContext = ContextToPush; 456 } 457 458 void pop() { 459 if (!SavedContext) return; 460 S.CurContext = SavedContext; 461 S.DelayedDiagnostics.popContext(SavedContextState); 462 SavedContext = 0; 463 } 464 465 ~ContextRAII() { 466 pop(); 467 } 468 }; 469 470 /// WeakUndeclaredIdentifiers - Identifiers contained in 471 /// #pragma weak before declared. rare. may alias another 472 /// identifier, declared or undeclared 473 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 474 475 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 476 /// #pragma redefine_extname before declared. Used in Solaris system headers 477 /// to define functions that occur in multiple standards to call the version 478 /// in the currently selected standard. 479 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 480 481 482 /// \brief Load weak undeclared identifiers from the external source. 483 void LoadExternalWeakUndeclaredIdentifiers(); 484 485 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 486 /// #pragma weak during processing of other Decls. 487 /// I couldn't figure out a clean way to generate these in-line, so 488 /// we store them here and handle separately -- which is a hack. 489 /// It would be best to refactor this. 490 SmallVector<Decl*,2> WeakTopLevelDecl; 491 492 IdentifierResolver IdResolver; 493 494 /// Translation Unit Scope - useful to Objective-C actions that need 495 /// to lookup file scope declarations in the "ordinary" C decl namespace. 496 /// For example, user-defined classes, built-in "id" type, etc. 497 Scope *TUScope; 498 499 /// \brief The C++ "std" namespace, where the standard library resides. 500 LazyDeclPtr StdNamespace; 501 502 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 503 /// standard library. 504 LazyDeclPtr StdBadAlloc; 505 506 /// \brief The C++ "std::initializer_list" template, which is defined in 507 /// <initializer_list>. 508 ClassTemplateDecl *StdInitializerList; 509 510 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 511 RecordDecl *CXXTypeInfoDecl; 512 513 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 514 RecordDecl *MSVCGuidDecl; 515 516 /// \brief Caches identifiers/selectors for NSFoundation APIs. 517 llvm::OwningPtr<NSAPI> NSAPIObj; 518 519 /// \brief The declaration of the Objective-C NSNumber class. 520 ObjCInterfaceDecl *NSNumberDecl; 521 522 /// \brief The Objective-C NSNumber methods used to create NSNumber literals. 523 ObjCMethodDecl *NSNumberLiteralMethods[NSAPI::NumNSNumberLiteralMethods]; 524 525 /// \brief The declaration of the Objective-C NSArray class. 526 ObjCInterfaceDecl *NSArrayDecl; 527 528 /// \brief The declaration of the arrayWithObjects:count: method. 529 ObjCMethodDecl *ArrayWithObjectsMethod; 530 531 /// \brief The declaration of the Objective-C NSDictionary class. 532 ObjCInterfaceDecl *NSDictionaryDecl; 533 534 /// \brief The declaration of the dictionaryWithObjects:forKeys:count: method. 535 ObjCMethodDecl *DictionaryWithObjectsMethod; 536 537 /// \brief id<NSCopying> type. 538 QualType QIDNSCopying; 539 540 /// A flag to remember whether the implicit forms of operator new and delete 541 /// have been declared. 542 bool GlobalNewDeleteDeclared; 543 544 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 545 /// call was found yet. 546 bool ObjCShouldCallSuperDealloc; 547 /// A flag that is set when parsing a -finalize method and no [super finalize] 548 /// call was found yet. 549 bool ObjCShouldCallSuperFinalize; 550 551 /// \brief Describes how the expressions currently being parsed are 552 /// evaluated at run-time, if at all. 553 enum ExpressionEvaluationContext { 554 /// \brief The current expression and its subexpressions occur within an 555 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 556 /// \c sizeof, where the type of the expression may be significant but 557 /// no code will be generated to evaluate the value of the expression at 558 /// run time. 559 Unevaluated, 560 561 /// \brief The current context is "potentially evaluated" in C++11 terms, 562 /// but the expression is evaluated at compile-time (like the values of 563 /// cases in a switch statment). 564 ConstantEvaluated, 565 566 /// \brief The current expression is potentially evaluated at run time, 567 /// which means that code may be generated to evaluate the value of the 568 /// expression at run time. 569 PotentiallyEvaluated, 570 571 /// \brief The current expression is potentially evaluated, but any 572 /// declarations referenced inside that expression are only used if 573 /// in fact the current expression is used. 574 /// 575 /// This value is used when parsing default function arguments, for which 576 /// we would like to provide diagnostics (e.g., passing non-POD arguments 577 /// through varargs) but do not want to mark declarations as "referenced" 578 /// until the default argument is used. 579 PotentiallyEvaluatedIfUsed 580 }; 581 582 /// \brief Data structure used to record current or nested 583 /// expression evaluation contexts. 584 struct ExpressionEvaluationContextRecord { 585 /// \brief The expression evaluation context. 586 ExpressionEvaluationContext Context; 587 588 /// \brief Whether the enclosing context needed a cleanup. 589 bool ParentNeedsCleanups; 590 591 /// \brief Whether we are in a decltype expression. 592 bool IsDecltype; 593 594 /// \brief The number of active cleanup objects when we entered 595 /// this expression evaluation context. 596 unsigned NumCleanupObjects; 597 598 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 599 600 /// \brief The lambdas that are present within this context, if it 601 /// is indeed an unevaluated context. 602 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 603 604 /// \brief The declaration that provides context for the lambda expression 605 /// if the normal declaration context does not suffice, e.g., in a 606 /// default function argument. 607 Decl *LambdaContextDecl; 608 609 /// \brief The context information used to mangle lambda expressions 610 /// within this context. 611 /// 612 /// This mangling information is allocated lazily, since most contexts 613 /// do not have lambda expressions. 614 LambdaMangleContext *LambdaMangle; 615 616 /// \brief If we are processing a decltype type, a set of call expressions 617 /// for which we have deferred checking the completeness of the return type. 618 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls; 619 620 /// \brief If we are processing a decltype type, a set of temporary binding 621 /// expressions for which we have deferred checking the destructor. 622 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds; 623 624 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 625 unsigned NumCleanupObjects, 626 bool ParentNeedsCleanups, 627 Decl *LambdaContextDecl, 628 bool IsDecltype) 629 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 630 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 631 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 632 633 ~ExpressionEvaluationContextRecord() { 634 delete LambdaMangle; 635 } 636 637 /// \brief Retrieve the mangling context for lambdas. 638 LambdaMangleContext &getLambdaMangleContext() { 639 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 640 if (!LambdaMangle) 641 LambdaMangle = new LambdaMangleContext; 642 return *LambdaMangle; 643 } 644 }; 645 646 /// A stack of expression evaluation contexts. 647 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 648 649 /// SpecialMemberOverloadResult - The overloading result for a special member 650 /// function. 651 /// 652 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 653 /// integer is used to determine whether we have a parameter qualification 654 /// match, the second-lowest is whether we had success in resolving the 655 /// overload to a unique non-deleted function. 656 /// 657 /// The ConstParamMatch bit represents whether, when looking up a copy 658 /// constructor or assignment operator, we found a potential copy 659 /// constructor/assignment operator whose first parameter is const-qualified. 660 /// This is used for determining parameter types of other objects and is 661 /// utterly meaningless on other types of special members. 662 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 663 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 664 public: 665 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 666 : FastFoldingSetNode(ID) 667 {} 668 669 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 670 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 671 672 bool hasSuccess() const { return Pair.getInt() & 0x1; } 673 void setSuccess(bool B) { 674 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 675 } 676 677 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 678 void setConstParamMatch(bool B) { 679 Pair.setInt(B << 1 | unsigned(hasSuccess())); 680 } 681 }; 682 683 /// \brief A cache of special member function overload resolution results 684 /// for C++ records. 685 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 686 687 /// \brief The kind of translation unit we are processing. 688 /// 689 /// When we're processing a complete translation unit, Sema will perform 690 /// end-of-translation-unit semantic tasks (such as creating 691 /// initializers for tentative definitions in C) once parsing has 692 /// completed. Modules and precompiled headers perform different kinds of 693 /// checks. 694 TranslationUnitKind TUKind; 695 696 llvm::BumpPtrAllocator BumpAlloc; 697 698 /// \brief The number of SFINAE diagnostics that have been trapped. 699 unsigned NumSFINAEErrors; 700 701 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 702 UnparsedDefaultArgInstantiationsMap; 703 704 /// \brief A mapping from parameters with unparsed default arguments to the 705 /// set of instantiations of each parameter. 706 /// 707 /// This mapping is a temporary data structure used when parsing 708 /// nested class templates or nested classes of class templates, 709 /// where we might end up instantiating an inner class before the 710 /// default arguments of its methods have been parsed. 711 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 712 713 // Contains the locations of the beginning of unparsed default 714 // argument locations. 715 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 716 717 /// UndefinedInternals - all the used, undefined objects with 718 /// internal linkage in this translation unit. 719 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 720 721 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 722 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 723 724 /// Method Pool - allows efficient lookup when typechecking messages to "id". 725 /// We need to maintain a list, since selectors can have differing signatures 726 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 727 /// of selectors are "overloaded"). 728 GlobalMethodPool MethodPool; 729 730 /// Method selectors used in a @selector expression. Used for implementation 731 /// of -Wselector. 732 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 733 734 void ReadMethodPool(Selector Sel); 735 736 /// Private Helper predicate to check for 'self'. 737 bool isSelfExpr(Expr *RExpr); 738public: 739 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 740 TranslationUnitKind TUKind = TU_Complete, 741 CodeCompleteConsumer *CompletionConsumer = 0); 742 ~Sema(); 743 744 /// \brief Perform initialization that occurs after the parser has been 745 /// initialized but before it parses anything. 746 void Initialize(); 747 748 const LangOptions &getLangOptions() const { return LangOpts; } 749 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 750 FPOptions &getFPOptions() { return FPFeatures; } 751 752 DiagnosticsEngine &getDiagnostics() const { return Diags; } 753 SourceManager &getSourceManager() const { return SourceMgr; } 754 const TargetAttributesSema &getTargetAttributesSema() const; 755 Preprocessor &getPreprocessor() const { return PP; } 756 ASTContext &getASTContext() const { return Context; } 757 ASTConsumer &getASTConsumer() const { return Consumer; } 758 ASTMutationListener *getASTMutationListener() const; 759 760 void PrintStats() const; 761 762 /// \brief Helper class that creates diagnostics with optional 763 /// template instantiation stacks. 764 /// 765 /// This class provides a wrapper around the basic DiagnosticBuilder 766 /// class that emits diagnostics. SemaDiagnosticBuilder is 767 /// responsible for emitting the diagnostic (as DiagnosticBuilder 768 /// does) and, if the diagnostic comes from inside a template 769 /// instantiation, printing the template instantiation stack as 770 /// well. 771 class SemaDiagnosticBuilder : public DiagnosticBuilder { 772 Sema &SemaRef; 773 unsigned DiagID; 774 775 public: 776 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 777 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 778 779 explicit SemaDiagnosticBuilder(Sema &SemaRef) 780 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 781 782 ~SemaDiagnosticBuilder(); 783 }; 784 785 /// \brief Emit a diagnostic. 786 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 787 788 /// \brief Emit a partial diagnostic. 789 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 790 791 /// \brief Build a partial diagnostic. 792 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 793 794 bool findMacroSpelling(SourceLocation &loc, StringRef name); 795 796 /// \brief Get a string to suggest for zero-initialization of a type. 797 const char *getFixItZeroInitializerForType(QualType T) const; 798 799 ExprResult Owned(Expr* E) { return E; } 800 ExprResult Owned(ExprResult R) { return R; } 801 StmtResult Owned(Stmt* S) { return S; } 802 803 void ActOnEndOfTranslationUnit(); 804 805 void CheckDelegatingCtorCycles(); 806 807 Scope *getScopeForContext(DeclContext *Ctx); 808 809 void PushFunctionScope(); 810 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 811 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 812 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 813 const Decl *D = 0, const BlockExpr *blkExpr = 0); 814 815 sema::FunctionScopeInfo *getCurFunction() const { 816 return FunctionScopes.back(); 817 } 818 819 void PushCompoundScope(); 820 void PopCompoundScope(); 821 822 sema::CompoundScopeInfo &getCurCompoundScope() const; 823 824 bool hasAnyUnrecoverableErrorsInThisFunction() const; 825 826 /// \brief Retrieve the current block, if any. 827 sema::BlockScopeInfo *getCurBlock(); 828 829 /// \brief Retrieve the current lambda expression, if any. 830 sema::LambdaScopeInfo *getCurLambda(); 831 832 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 833 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 834 835 //===--------------------------------------------------------------------===// 836 // Type Analysis / Processing: SemaType.cpp. 837 // 838 839 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 840 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 841 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 842 } 843 QualType BuildPointerType(QualType T, 844 SourceLocation Loc, DeclarationName Entity); 845 QualType BuildReferenceType(QualType T, bool LValueRef, 846 SourceLocation Loc, DeclarationName Entity); 847 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 848 Expr *ArraySize, unsigned Quals, 849 SourceRange Brackets, DeclarationName Entity); 850 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 851 SourceLocation AttrLoc); 852 QualType BuildFunctionType(QualType T, 853 QualType *ParamTypes, unsigned NumParamTypes, 854 bool Variadic, bool HasTrailingReturn, 855 unsigned Quals, RefQualifierKind RefQualifier, 856 SourceLocation Loc, DeclarationName Entity, 857 FunctionType::ExtInfo Info); 858 QualType BuildMemberPointerType(QualType T, QualType Class, 859 SourceLocation Loc, 860 DeclarationName Entity); 861 QualType BuildBlockPointerType(QualType T, 862 SourceLocation Loc, DeclarationName Entity); 863 QualType BuildParenType(QualType T); 864 QualType BuildAtomicType(QualType T, SourceLocation Loc); 865 866 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 867 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 868 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 869 TypeSourceInfo *ReturnTypeInfo); 870 /// \brief Package the given type and TSI into a ParsedType. 871 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 872 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 873 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 874 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 875 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 876 bool CheckDistantExceptionSpec(QualType T); 877 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 878 bool CheckEquivalentExceptionSpec( 879 const FunctionProtoType *Old, SourceLocation OldLoc, 880 const FunctionProtoType *New, SourceLocation NewLoc); 881 bool CheckEquivalentExceptionSpec( 882 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 883 const FunctionProtoType *Old, SourceLocation OldLoc, 884 const FunctionProtoType *New, SourceLocation NewLoc, 885 bool *MissingExceptionSpecification = 0, 886 bool *MissingEmptyExceptionSpecification = 0, 887 bool AllowNoexceptAllMatchWithNoSpec = false, 888 bool IsOperatorNew = false); 889 bool CheckExceptionSpecSubset( 890 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 891 const FunctionProtoType *Superset, SourceLocation SuperLoc, 892 const FunctionProtoType *Subset, SourceLocation SubLoc); 893 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 894 const FunctionProtoType *Target, SourceLocation TargetLoc, 895 const FunctionProtoType *Source, SourceLocation SourceLoc); 896 897 TypeResult ActOnTypeName(Scope *S, Declarator &D); 898 899 /// \brief The parser has parsed the context-sensitive type 'instancetype' 900 /// in an Objective-C message declaration. Return the appropriate type. 901 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 902 903 bool RequireCompleteType(SourceLocation Loc, QualType T, 904 const PartialDiagnostic &PD, 905 std::pair<SourceLocation, PartialDiagnostic> Note); 906 bool RequireCompleteType(SourceLocation Loc, QualType T, 907 const PartialDiagnostic &PD); 908 bool RequireCompleteType(SourceLocation Loc, QualType T, 909 unsigned DiagID); 910 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 911 std::pair<SourceLocation, 912 PartialDiagnostic> Note); 913 914 bool RequireLiteralType(SourceLocation Loc, QualType T, 915 const PartialDiagnostic &PD); 916 917 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 918 const CXXScopeSpec &SS, QualType T); 919 920 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 921 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 922 QualType BuildUnaryTransformType(QualType BaseType, 923 UnaryTransformType::UTTKind UKind, 924 SourceLocation Loc); 925 926 //===--------------------------------------------------------------------===// 927 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 928 // 929 930 /// List of decls defined in a function prototype. This contains EnumConstants 931 /// that incorrectly end up in translation unit scope because there is no 932 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 933 /// them into the FunctionDecl. 934 std::vector<NamedDecl*> DeclsInPrototypeScope; 935 /// Nonzero if we are currently parsing a function declarator. This is a counter 936 /// as opposed to a boolean so we can deal with nested function declarators 937 /// such as: 938 /// void f(void (*g)(), ...) 939 unsigned InFunctionDeclarator; 940 941 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 942 943 void DiagnoseUseOfUnimplementedSelectors(); 944 945 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 946 Scope *S, CXXScopeSpec *SS = 0, 947 bool isClassName = false, 948 bool HasTrailingDot = false, 949 ParsedType ObjectType = ParsedType(), 950 bool IsCtorOrDtorName = false, 951 bool WantNontrivialTypeSourceInfo = false, 952 IdentifierInfo **CorrectedII = 0); 953 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 954 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 955 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 956 SourceLocation IILoc, 957 Scope *S, 958 CXXScopeSpec *SS, 959 ParsedType &SuggestedType); 960 961 /// \brief Describes the result of the name lookup and resolution performed 962 /// by \c ClassifyName(). 963 enum NameClassificationKind { 964 NC_Unknown, 965 NC_Error, 966 NC_Keyword, 967 NC_Type, 968 NC_Expression, 969 NC_NestedNameSpecifier, 970 NC_TypeTemplate, 971 NC_FunctionTemplate 972 }; 973 974 class NameClassification { 975 NameClassificationKind Kind; 976 ExprResult Expr; 977 TemplateName Template; 978 ParsedType Type; 979 const IdentifierInfo *Keyword; 980 981 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 982 983 public: 984 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 985 986 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 987 988 NameClassification(const IdentifierInfo *Keyword) 989 : Kind(NC_Keyword), Keyword(Keyword) { } 990 991 static NameClassification Error() { 992 return NameClassification(NC_Error); 993 } 994 995 static NameClassification Unknown() { 996 return NameClassification(NC_Unknown); 997 } 998 999 static NameClassification NestedNameSpecifier() { 1000 return NameClassification(NC_NestedNameSpecifier); 1001 } 1002 1003 static NameClassification TypeTemplate(TemplateName Name) { 1004 NameClassification Result(NC_TypeTemplate); 1005 Result.Template = Name; 1006 return Result; 1007 } 1008 1009 static NameClassification FunctionTemplate(TemplateName Name) { 1010 NameClassification Result(NC_FunctionTemplate); 1011 Result.Template = Name; 1012 return Result; 1013 } 1014 1015 NameClassificationKind getKind() const { return Kind; } 1016 1017 ParsedType getType() const { 1018 assert(Kind == NC_Type); 1019 return Type; 1020 } 1021 1022 ExprResult getExpression() const { 1023 assert(Kind == NC_Expression); 1024 return Expr; 1025 } 1026 1027 TemplateName getTemplateName() const { 1028 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1029 return Template; 1030 } 1031 1032 TemplateNameKind getTemplateNameKind() const { 1033 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1034 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1035 } 1036}; 1037 1038 /// \brief Perform name lookup on the given name, classifying it based on 1039 /// the results of name lookup and the following token. 1040 /// 1041 /// This routine is used by the parser to resolve identifiers and help direct 1042 /// parsing. When the identifier cannot be found, this routine will attempt 1043 /// to correct the typo and classify based on the resulting name. 1044 /// 1045 /// \param S The scope in which we're performing name lookup. 1046 /// 1047 /// \param SS The nested-name-specifier that precedes the name. 1048 /// 1049 /// \param Name The identifier. If typo correction finds an alternative name, 1050 /// this pointer parameter will be updated accordingly. 1051 /// 1052 /// \param NameLoc The location of the identifier. 1053 /// 1054 /// \param NextToken The token following the identifier. Used to help 1055 /// disambiguate the name. 1056 NameClassification ClassifyName(Scope *S, 1057 CXXScopeSpec &SS, 1058 IdentifierInfo *&Name, 1059 SourceLocation NameLoc, 1060 const Token &NextToken); 1061 1062 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1063 1064 Decl *HandleDeclarator(Scope *S, Declarator &D, 1065 MultiTemplateParamsArg TemplateParameterLists); 1066 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1067 const LookupResult &Previous, 1068 Scope *S); 1069 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1070 void DiagnoseFunctionSpecifiers(Declarator& D); 1071 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1072 void CheckShadow(Scope *S, VarDecl *D); 1073 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1074 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1075 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1076 TypeSourceInfo *TInfo, 1077 LookupResult &Previous); 1078 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1079 LookupResult &Previous, bool &Redeclaration); 1080 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1081 TypeSourceInfo *TInfo, 1082 LookupResult &Previous, 1083 MultiTemplateParamsArg TemplateParamLists); 1084 // Returns true if the variable declaration is a redeclaration 1085 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1086 void CheckCompleteVariableDeclaration(VarDecl *var); 1087 void ActOnStartFunctionDeclarator(); 1088 void ActOnEndFunctionDeclarator(); 1089 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1090 TypeSourceInfo *TInfo, 1091 LookupResult &Previous, 1092 MultiTemplateParamsArg TemplateParamLists, 1093 bool &AddToScope); 1094 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1095 1096 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1097 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1098 1099 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1100 // Returns true if the function declaration is a redeclaration 1101 bool CheckFunctionDeclaration(Scope *S, 1102 FunctionDecl *NewFD, LookupResult &Previous, 1103 bool IsExplicitSpecialization); 1104 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1105 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1106 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1107 SourceLocation Loc, 1108 QualType T); 1109 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1110 SourceLocation NameLoc, IdentifierInfo *Name, 1111 QualType T, TypeSourceInfo *TSInfo, 1112 StorageClass SC, StorageClass SCAsWritten); 1113 void ActOnParamDefaultArgument(Decl *param, 1114 SourceLocation EqualLoc, 1115 Expr *defarg); 1116 void ActOnParamUnparsedDefaultArgument(Decl *param, 1117 SourceLocation EqualLoc, 1118 SourceLocation ArgLoc); 1119 void ActOnParamDefaultArgumentError(Decl *param); 1120 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1121 SourceLocation EqualLoc); 1122 1123 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1124 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1125 bool TypeMayContainAuto); 1126 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1127 void ActOnInitializerError(Decl *Dcl); 1128 void ActOnCXXForRangeDecl(Decl *D); 1129 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1130 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1131 void FinalizeDeclaration(Decl *D); 1132 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1133 Decl **Group, 1134 unsigned NumDecls); 1135 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1136 bool TypeMayContainAuto = true); 1137 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1138 SourceLocation LocAfterDecls); 1139 void CheckForFunctionRedefinition(FunctionDecl *FD); 1140 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1141 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1142 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1143 1144 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1145 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1146 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1147 1148 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1149 /// attribute for which parsing is delayed. 1150 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1151 1152 /// \brief Diagnose any unused parameters in the given sequence of 1153 /// ParmVarDecl pointers. 1154 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1155 ParmVarDecl * const *End); 1156 1157 /// \brief Diagnose whether the size of parameters or return value of a 1158 /// function or obj-c method definition is pass-by-value and larger than a 1159 /// specified threshold. 1160 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1161 ParmVarDecl * const *End, 1162 QualType ReturnTy, 1163 NamedDecl *D); 1164 1165 void DiagnoseInvalidJumps(Stmt *Body); 1166 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1167 SourceLocation AsmLoc, 1168 SourceLocation RParenLoc); 1169 1170 /// \brief The parser has processed a module import declaration. 1171 /// 1172 /// \param AtLoc The location of the '@' symbol, if any. 1173 /// 1174 /// \param ImportLoc The location of the 'import' keyword. 1175 /// 1176 /// \param Path The module access path. 1177 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1178 ModuleIdPath Path); 1179 1180 /// \brief Retrieve a suitable printing policy. 1181 PrintingPolicy getPrintingPolicy() const { 1182 return getPrintingPolicy(Context, PP); 1183 } 1184 1185 /// \brief Retrieve a suitable printing policy. 1186 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1187 const Preprocessor &PP); 1188 1189 /// Scope actions. 1190 void ActOnPopScope(SourceLocation Loc, Scope *S); 1191 void ActOnTranslationUnitScope(Scope *S); 1192 1193 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1194 DeclSpec &DS); 1195 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1196 DeclSpec &DS, 1197 MultiTemplateParamsArg TemplateParams); 1198 1199 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1200 AccessSpecifier AS, 1201 RecordDecl *Record); 1202 1203 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1204 RecordDecl *Record); 1205 1206 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1207 TagTypeKind NewTag, bool isDefinition, 1208 SourceLocation NewTagLoc, 1209 const IdentifierInfo &Name); 1210 1211 enum TagUseKind { 1212 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1213 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1214 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1215 TUK_Friend // Friend declaration: 'friend struct foo;' 1216 }; 1217 1218 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1219 SourceLocation KWLoc, CXXScopeSpec &SS, 1220 IdentifierInfo *Name, SourceLocation NameLoc, 1221 AttributeList *Attr, AccessSpecifier AS, 1222 SourceLocation ModulePrivateLoc, 1223 MultiTemplateParamsArg TemplateParameterLists, 1224 bool &OwnedDecl, bool &IsDependent, 1225 SourceLocation ScopedEnumKWLoc, 1226 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1227 1228 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1229 unsigned TagSpec, SourceLocation TagLoc, 1230 CXXScopeSpec &SS, 1231 IdentifierInfo *Name, SourceLocation NameLoc, 1232 AttributeList *Attr, 1233 MultiTemplateParamsArg TempParamLists); 1234 1235 TypeResult ActOnDependentTag(Scope *S, 1236 unsigned TagSpec, 1237 TagUseKind TUK, 1238 const CXXScopeSpec &SS, 1239 IdentifierInfo *Name, 1240 SourceLocation TagLoc, 1241 SourceLocation NameLoc); 1242 1243 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1244 IdentifierInfo *ClassName, 1245 SmallVectorImpl<Decl *> &Decls); 1246 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1247 Declarator &D, Expr *BitfieldWidth); 1248 1249 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1250 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1251 AccessSpecifier AS); 1252 1253 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1254 TypeSourceInfo *TInfo, 1255 RecordDecl *Record, SourceLocation Loc, 1256 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1257 SourceLocation TSSL, 1258 AccessSpecifier AS, NamedDecl *PrevDecl, 1259 Declarator *D = 0); 1260 1261 enum CXXSpecialMember { 1262 CXXDefaultConstructor, 1263 CXXCopyConstructor, 1264 CXXMoveConstructor, 1265 CXXCopyAssignment, 1266 CXXMoveAssignment, 1267 CXXDestructor, 1268 CXXInvalid 1269 }; 1270 bool CheckNontrivialField(FieldDecl *FD); 1271 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1272 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1273 void ActOnLastBitfield(SourceLocation DeclStart, 1274 SmallVectorImpl<Decl *> &AllIvarDecls); 1275 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1276 Declarator &D, Expr *BitfieldWidth, 1277 tok::ObjCKeywordKind visibility); 1278 1279 // This is used for both record definitions and ObjC interface declarations. 1280 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1281 llvm::ArrayRef<Decl *> Fields, 1282 SourceLocation LBrac, SourceLocation RBrac, 1283 AttributeList *AttrList); 1284 1285 /// ActOnTagStartDefinition - Invoked when we have entered the 1286 /// scope of a tag's definition (e.g., for an enumeration, class, 1287 /// struct, or union). 1288 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1289 1290 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1291 1292 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1293 /// C++ record definition's base-specifiers clause and are starting its 1294 /// member declarations. 1295 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1296 SourceLocation FinalLoc, 1297 SourceLocation LBraceLoc); 1298 1299 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1300 /// the definition of a tag (enumeration, class, struct, or union). 1301 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1302 SourceLocation RBraceLoc); 1303 1304 void ActOnObjCContainerFinishDefinition(); 1305 1306 /// \brief Invoked when we must temporarily exit the objective-c container 1307 /// scope for parsing/looking-up C constructs. 1308 /// 1309 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1310 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1311 void ActOnObjCReenterContainerContext(DeclContext *DC); 1312 1313 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1314 /// error parsing the definition of a tag. 1315 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1316 1317 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1318 EnumConstantDecl *LastEnumConst, 1319 SourceLocation IdLoc, 1320 IdentifierInfo *Id, 1321 Expr *val); 1322 1323 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1324 SourceLocation IdLoc, IdentifierInfo *Id, 1325 AttributeList *Attrs, 1326 SourceLocation EqualLoc, Expr *Val); 1327 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1328 SourceLocation RBraceLoc, Decl *EnumDecl, 1329 Decl **Elements, unsigned NumElements, 1330 Scope *S, AttributeList *Attr); 1331 1332 DeclContext *getContainingDC(DeclContext *DC); 1333 1334 /// Set the current declaration context until it gets popped. 1335 void PushDeclContext(Scope *S, DeclContext *DC); 1336 void PopDeclContext(); 1337 1338 /// EnterDeclaratorContext - Used when we must lookup names in the context 1339 /// of a declarator's nested name specifier. 1340 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1341 void ExitDeclaratorContext(Scope *S); 1342 1343 /// Push the parameters of D, which must be a function, into scope. 1344 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1345 void ActOnExitFunctionContext() { PopDeclContext(); } 1346 1347 DeclContext *getFunctionLevelDeclContext(); 1348 1349 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1350 /// to the function decl for the function being parsed. If we're currently 1351 /// in a 'block', this returns the containing context. 1352 FunctionDecl *getCurFunctionDecl(); 1353 1354 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1355 /// the method decl for the method being parsed. If we're currently 1356 /// in a 'block', this returns the containing context. 1357 ObjCMethodDecl *getCurMethodDecl(); 1358 1359 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1360 /// or C function we're in, otherwise return null. If we're currently 1361 /// in a 'block', this returns the containing context. 1362 NamedDecl *getCurFunctionOrMethodDecl(); 1363 1364 /// Add this decl to the scope shadowed decl chains. 1365 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1366 1367 /// \brief Make the given externally-produced declaration visible at the 1368 /// top level scope. 1369 /// 1370 /// \param D The externally-produced declaration to push. 1371 /// 1372 /// \param Name The name of the externally-produced declaration. 1373 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1374 1375 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1376 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1377 /// true if 'D' belongs to the given declaration context. 1378 /// 1379 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1380 /// whether the declaration is in scope for the purposes of explicit template 1381 /// instantiation or specialization. The default is false. 1382 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1383 bool ExplicitInstantiationOrSpecialization = false); 1384 1385 /// Finds the scope corresponding to the given decl context, if it 1386 /// happens to be an enclosing scope. Otherwise return NULL. 1387 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1388 1389 /// Subroutines of ActOnDeclarator(). 1390 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1391 TypeSourceInfo *TInfo); 1392 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1393 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1394 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1395 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1396 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1397 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1398 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1399 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1400 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1401 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1402 1403 // AssignmentAction - This is used by all the assignment diagnostic functions 1404 // to represent what is actually causing the operation 1405 enum AssignmentAction { 1406 AA_Assigning, 1407 AA_Passing, 1408 AA_Returning, 1409 AA_Converting, 1410 AA_Initializing, 1411 AA_Sending, 1412 AA_Casting 1413 }; 1414 1415 /// C++ Overloading. 1416 enum OverloadKind { 1417 /// This is a legitimate overload: the existing declarations are 1418 /// functions or function templates with different signatures. 1419 Ovl_Overload, 1420 1421 /// This is not an overload because the signature exactly matches 1422 /// an existing declaration. 1423 Ovl_Match, 1424 1425 /// This is not an overload because the lookup results contain a 1426 /// non-function. 1427 Ovl_NonFunction 1428 }; 1429 OverloadKind CheckOverload(Scope *S, 1430 FunctionDecl *New, 1431 const LookupResult &OldDecls, 1432 NamedDecl *&OldDecl, 1433 bool IsForUsingDecl); 1434 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1435 1436 /// \brief Checks availability of the function depending on the current 1437 /// function context.Inside an unavailable function,unavailability is ignored. 1438 /// 1439 /// \returns true if \arg FD is unavailable and current context is inside 1440 /// an available function, false otherwise. 1441 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1442 1443 ImplicitConversionSequence 1444 TryImplicitConversion(Expr *From, QualType ToType, 1445 bool SuppressUserConversions, 1446 bool AllowExplicit, 1447 bool InOverloadResolution, 1448 bool CStyle, 1449 bool AllowObjCWritebackConversion); 1450 1451 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1452 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1453 bool IsComplexPromotion(QualType FromType, QualType ToType); 1454 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1455 bool InOverloadResolution, 1456 QualType& ConvertedType, bool &IncompatibleObjC); 1457 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1458 QualType& ConvertedType, bool &IncompatibleObjC); 1459 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1460 QualType &ConvertedType); 1461 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1462 QualType& ConvertedType); 1463 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1464 const FunctionProtoType *NewType, 1465 unsigned *ArgPos = 0); 1466 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1467 QualType FromType, QualType ToType); 1468 1469 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1470 bool CheckPointerConversion(Expr *From, QualType ToType, 1471 CastKind &Kind, 1472 CXXCastPath& BasePath, 1473 bool IgnoreBaseAccess); 1474 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1475 bool InOverloadResolution, 1476 QualType &ConvertedType); 1477 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1478 CastKind &Kind, 1479 CXXCastPath &BasePath, 1480 bool IgnoreBaseAccess); 1481 bool IsQualificationConversion(QualType FromType, QualType ToType, 1482 bool CStyle, bool &ObjCLifetimeConversion); 1483 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1484 QualType &ResultTy); 1485 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1486 1487 1488 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1489 const VarDecl *NRVOCandidate, 1490 QualType ResultType, 1491 Expr *Value, 1492 bool AllowNRVO = true); 1493 1494 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1495 ExprResult Init); 1496 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1497 SourceLocation EqualLoc, 1498 ExprResult Init, 1499 bool TopLevelOfInitList = false, 1500 bool AllowExplicit = false); 1501 ExprResult PerformObjectArgumentInitialization(Expr *From, 1502 NestedNameSpecifier *Qualifier, 1503 NamedDecl *FoundDecl, 1504 CXXMethodDecl *Method); 1505 1506 ExprResult PerformContextuallyConvertToBool(Expr *From); 1507 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1508 1509 /// Contexts in which a converted constant expression is required. 1510 enum CCEKind { 1511 CCEK_CaseValue, ///< Expression in a case label. 1512 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1513 CCEK_TemplateArg ///< Value of a non-type template parameter. 1514 }; 1515 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1516 llvm::APSInt &Value, CCEKind CCE); 1517 1518 ExprResult 1519 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1520 const PartialDiagnostic &NotIntDiag, 1521 const PartialDiagnostic &IncompleteDiag, 1522 const PartialDiagnostic &ExplicitConvDiag, 1523 const PartialDiagnostic &ExplicitConvNote, 1524 const PartialDiagnostic &AmbigDiag, 1525 const PartialDiagnostic &AmbigNote, 1526 const PartialDiagnostic &ConvDiag, 1527 bool AllowScopedEnumerations); 1528 enum ObjCSubscriptKind { 1529 OS_Array, 1530 OS_Dictionary, 1531 OS_Error 1532 }; 1533 ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE); 1534 1535 ExprResult PerformObjectMemberConversion(Expr *From, 1536 NestedNameSpecifier *Qualifier, 1537 NamedDecl *FoundDecl, 1538 NamedDecl *Member); 1539 1540 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1541 // TODO: make this is a typesafe union. 1542 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1543 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1544 1545 void AddOverloadCandidate(FunctionDecl *Function, 1546 DeclAccessPair FoundDecl, 1547 llvm::ArrayRef<Expr *> Args, 1548 OverloadCandidateSet& CandidateSet, 1549 bool SuppressUserConversions = false, 1550 bool PartialOverloading = false, 1551 bool AllowExplicit = false); 1552 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1553 llvm::ArrayRef<Expr *> Args, 1554 OverloadCandidateSet& CandidateSet, 1555 bool SuppressUserConversions = false); 1556 void AddMethodCandidate(DeclAccessPair FoundDecl, 1557 QualType ObjectType, 1558 Expr::Classification ObjectClassification, 1559 Expr **Args, unsigned NumArgs, 1560 OverloadCandidateSet& CandidateSet, 1561 bool SuppressUserConversion = false); 1562 void AddMethodCandidate(CXXMethodDecl *Method, 1563 DeclAccessPair FoundDecl, 1564 CXXRecordDecl *ActingContext, QualType ObjectType, 1565 Expr::Classification ObjectClassification, 1566 llvm::ArrayRef<Expr *> Args, 1567 OverloadCandidateSet& CandidateSet, 1568 bool SuppressUserConversions = false); 1569 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1570 DeclAccessPair FoundDecl, 1571 CXXRecordDecl *ActingContext, 1572 TemplateArgumentListInfo *ExplicitTemplateArgs, 1573 QualType ObjectType, 1574 Expr::Classification ObjectClassification, 1575 llvm::ArrayRef<Expr *> Args, 1576 OverloadCandidateSet& CandidateSet, 1577 bool SuppressUserConversions = false); 1578 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1579 DeclAccessPair FoundDecl, 1580 TemplateArgumentListInfo *ExplicitTemplateArgs, 1581 llvm::ArrayRef<Expr *> Args, 1582 OverloadCandidateSet& CandidateSet, 1583 bool SuppressUserConversions = false); 1584 void AddConversionCandidate(CXXConversionDecl *Conversion, 1585 DeclAccessPair FoundDecl, 1586 CXXRecordDecl *ActingContext, 1587 Expr *From, QualType ToType, 1588 OverloadCandidateSet& CandidateSet); 1589 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1590 DeclAccessPair FoundDecl, 1591 CXXRecordDecl *ActingContext, 1592 Expr *From, QualType ToType, 1593 OverloadCandidateSet &CandidateSet); 1594 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1595 DeclAccessPair FoundDecl, 1596 CXXRecordDecl *ActingContext, 1597 const FunctionProtoType *Proto, 1598 Expr *Object, llvm::ArrayRef<Expr*> Args, 1599 OverloadCandidateSet& CandidateSet); 1600 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1601 SourceLocation OpLoc, 1602 Expr **Args, unsigned NumArgs, 1603 OverloadCandidateSet& CandidateSet, 1604 SourceRange OpRange = SourceRange()); 1605 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1606 Expr **Args, unsigned NumArgs, 1607 OverloadCandidateSet& CandidateSet, 1608 bool IsAssignmentOperator = false, 1609 unsigned NumContextualBoolArguments = 0); 1610 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1611 SourceLocation OpLoc, 1612 Expr **Args, unsigned NumArgs, 1613 OverloadCandidateSet& CandidateSet); 1614 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1615 bool Operator, SourceLocation Loc, 1616 llvm::ArrayRef<Expr *> Args, 1617 TemplateArgumentListInfo *ExplicitTemplateArgs, 1618 OverloadCandidateSet& CandidateSet, 1619 bool PartialOverloading = false, 1620 bool StdNamespaceIsAssociated = false); 1621 1622 // Emit as a 'note' the specific overload candidate 1623 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1624 1625 // Emit as a series of 'note's all template and non-templates 1626 // identified by the expression Expr 1627 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1628 1629 // [PossiblyAFunctionType] --> [Return] 1630 // NonFunctionType --> NonFunctionType 1631 // R (A) --> R(A) 1632 // R (*)(A) --> R (A) 1633 // R (&)(A) --> R (A) 1634 // R (S::*)(A) --> R (A) 1635 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1636 1637 FunctionDecl * 1638 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1639 QualType TargetType, 1640 bool Complain, 1641 DeclAccessPair &Found, 1642 bool *pHadMultipleCandidates = 0); 1643 1644 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1645 bool Complain = false, 1646 DeclAccessPair* Found = 0); 1647 1648 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1649 ExprResult &SrcExpr, 1650 bool DoFunctionPointerConverion = false, 1651 bool Complain = false, 1652 const SourceRange& OpRangeForComplaining = SourceRange(), 1653 QualType DestTypeForComplaining = QualType(), 1654 unsigned DiagIDForComplaining = 0); 1655 1656 1657 Expr *FixOverloadedFunctionReference(Expr *E, 1658 DeclAccessPair FoundDecl, 1659 FunctionDecl *Fn); 1660 ExprResult FixOverloadedFunctionReference(ExprResult, 1661 DeclAccessPair FoundDecl, 1662 FunctionDecl *Fn); 1663 1664 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1665 llvm::ArrayRef<Expr *> Args, 1666 OverloadCandidateSet &CandidateSet, 1667 bool PartialOverloading = false); 1668 1669 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1670 UnresolvedLookupExpr *ULE, 1671 SourceLocation LParenLoc, 1672 Expr **Args, unsigned NumArgs, 1673 SourceLocation RParenLoc, 1674 Expr *ExecConfig, 1675 bool AllowTypoCorrection=true); 1676 1677 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1678 unsigned Opc, 1679 const UnresolvedSetImpl &Fns, 1680 Expr *input); 1681 1682 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1683 unsigned Opc, 1684 const UnresolvedSetImpl &Fns, 1685 Expr *LHS, Expr *RHS); 1686 1687 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1688 SourceLocation RLoc, 1689 Expr *Base,Expr *Idx); 1690 1691 ExprResult 1692 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1693 SourceLocation LParenLoc, Expr **Args, 1694 unsigned NumArgs, SourceLocation RParenLoc); 1695 ExprResult 1696 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1697 Expr **Args, unsigned NumArgs, 1698 SourceLocation RParenLoc); 1699 1700 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1701 SourceLocation OpLoc); 1702 1703 /// CheckCallReturnType - Checks that a call expression's return type is 1704 /// complete. Returns true on failure. The location passed in is the location 1705 /// that best represents the call. 1706 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1707 CallExpr *CE, FunctionDecl *FD); 1708 1709 /// Helpers for dealing with blocks and functions. 1710 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1711 bool CheckParameterNames); 1712 void CheckCXXDefaultArguments(FunctionDecl *FD); 1713 void CheckExtraCXXDefaultArguments(Declarator &D); 1714 Scope *getNonFieldDeclScope(Scope *S); 1715 1716 /// \name Name lookup 1717 /// 1718 /// These routines provide name lookup that is used during semantic 1719 /// analysis to resolve the various kinds of names (identifiers, 1720 /// overloaded operator names, constructor names, etc.) into zero or 1721 /// more declarations within a particular scope. The major entry 1722 /// points are LookupName, which performs unqualified name lookup, 1723 /// and LookupQualifiedName, which performs qualified name lookup. 1724 /// 1725 /// All name lookup is performed based on some specific criteria, 1726 /// which specify what names will be visible to name lookup and how 1727 /// far name lookup should work. These criteria are important both 1728 /// for capturing language semantics (certain lookups will ignore 1729 /// certain names, for example) and for performance, since name 1730 /// lookup is often a bottleneck in the compilation of C++. Name 1731 /// lookup criteria is specified via the LookupCriteria enumeration. 1732 /// 1733 /// The results of name lookup can vary based on the kind of name 1734 /// lookup performed, the current language, and the translation 1735 /// unit. In C, for example, name lookup will either return nothing 1736 /// (no entity found) or a single declaration. In C++, name lookup 1737 /// can additionally refer to a set of overloaded functions or 1738 /// result in an ambiguity. All of the possible results of name 1739 /// lookup are captured by the LookupResult class, which provides 1740 /// the ability to distinguish among them. 1741 //@{ 1742 1743 /// @brief Describes the kind of name lookup to perform. 1744 enum LookupNameKind { 1745 /// Ordinary name lookup, which finds ordinary names (functions, 1746 /// variables, typedefs, etc.) in C and most kinds of names 1747 /// (functions, variables, members, types, etc.) in C++. 1748 LookupOrdinaryName = 0, 1749 /// Tag name lookup, which finds the names of enums, classes, 1750 /// structs, and unions. 1751 LookupTagName, 1752 /// Label name lookup. 1753 LookupLabel, 1754 /// Member name lookup, which finds the names of 1755 /// class/struct/union members. 1756 LookupMemberName, 1757 /// Look up of an operator name (e.g., operator+) for use with 1758 /// operator overloading. This lookup is similar to ordinary name 1759 /// lookup, but will ignore any declarations that are class members. 1760 LookupOperatorName, 1761 /// Look up of a name that precedes the '::' scope resolution 1762 /// operator in C++. This lookup completely ignores operator, object, 1763 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1764 LookupNestedNameSpecifierName, 1765 /// Look up a namespace name within a C++ using directive or 1766 /// namespace alias definition, ignoring non-namespace names (C++ 1767 /// [basic.lookup.udir]p1). 1768 LookupNamespaceName, 1769 /// Look up all declarations in a scope with the given name, 1770 /// including resolved using declarations. This is appropriate 1771 /// for checking redeclarations for a using declaration. 1772 LookupUsingDeclName, 1773 /// Look up an ordinary name that is going to be redeclared as a 1774 /// name with linkage. This lookup ignores any declarations that 1775 /// are outside of the current scope unless they have linkage. See 1776 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1777 LookupRedeclarationWithLinkage, 1778 /// Look up the name of an Objective-C protocol. 1779 LookupObjCProtocolName, 1780 /// Look up implicit 'self' parameter of an objective-c method. 1781 LookupObjCImplicitSelfParam, 1782 /// \brief Look up any declaration with any name. 1783 LookupAnyName 1784 }; 1785 1786 /// \brief Specifies whether (or how) name lookup is being performed for a 1787 /// redeclaration (vs. a reference). 1788 enum RedeclarationKind { 1789 /// \brief The lookup is a reference to this name that is not for the 1790 /// purpose of redeclaring the name. 1791 NotForRedeclaration = 0, 1792 /// \brief The lookup results will be used for redeclaration of a name, 1793 /// if an entity by that name already exists. 1794 ForRedeclaration 1795 }; 1796 1797 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1798 CXXSpecialMember SM, 1799 bool ConstArg, 1800 bool VolatileArg, 1801 bool RValueThis, 1802 bool ConstThis, 1803 bool VolatileThis); 1804 1805private: 1806 bool CppLookupName(LookupResult &R, Scope *S); 1807 1808 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1809 // 1810 // The boolean value will be true to indicate that the namespace was loaded 1811 // from an AST/PCH file, or false otherwise. 1812 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1813 1814 /// \brief Whether we have already loaded known namespaces from an extenal 1815 /// source. 1816 bool LoadedExternalKnownNamespaces; 1817 1818public: 1819 /// \brief Look up a name, looking for a single declaration. Return 1820 /// null if the results were absent, ambiguous, or overloaded. 1821 /// 1822 /// It is preferable to use the elaborated form and explicitly handle 1823 /// ambiguity and overloaded. 1824 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1825 SourceLocation Loc, 1826 LookupNameKind NameKind, 1827 RedeclarationKind Redecl 1828 = NotForRedeclaration); 1829 bool LookupName(LookupResult &R, Scope *S, 1830 bool AllowBuiltinCreation = false); 1831 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1832 bool InUnqualifiedLookup = false); 1833 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1834 bool AllowBuiltinCreation = false, 1835 bool EnteringContext = false); 1836 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1837 RedeclarationKind Redecl 1838 = NotForRedeclaration); 1839 1840 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1841 QualType T1, QualType T2, 1842 UnresolvedSetImpl &Functions); 1843 1844 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1845 SourceLocation GnuLabelLoc = SourceLocation()); 1846 1847 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1848 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1849 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1850 unsigned Quals, 1851 bool *ConstParam = 0); 1852 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1853 bool RValueThis, unsigned ThisQuals, 1854 bool *ConstParam = 0); 1855 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1856 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1857 unsigned ThisQuals); 1858 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1859 1860 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1861 SourceLocation Loc, 1862 llvm::ArrayRef<Expr *> Args, 1863 ADLResult &Functions, 1864 bool StdNamespaceIsAssociated = false); 1865 1866 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1867 VisibleDeclConsumer &Consumer, 1868 bool IncludeGlobalScope = true); 1869 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1870 VisibleDeclConsumer &Consumer, 1871 bool IncludeGlobalScope = true); 1872 1873 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1874 Sema::LookupNameKind LookupKind, 1875 Scope *S, CXXScopeSpec *SS, 1876 CorrectionCandidateCallback &CCC, 1877 DeclContext *MemberContext = 0, 1878 bool EnteringContext = false, 1879 const ObjCObjectPointerType *OPT = 0); 1880 1881 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 1882 AssociatedNamespaceSet &AssociatedNamespaces, 1883 AssociatedClassSet &AssociatedClasses); 1884 1885 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1886 bool ConsiderLinkage, 1887 bool ExplicitInstantiationOrSpecialization); 1888 1889 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1890 //@} 1891 1892 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1893 SourceLocation IdLoc, 1894 bool TypoCorrection = false); 1895 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1896 Scope *S, bool ForRedeclaration, 1897 SourceLocation Loc); 1898 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1899 Scope *S); 1900 void AddKnownFunctionAttributes(FunctionDecl *FD); 1901 1902 // More parsing and symbol table subroutines. 1903 1904 // Decl attributes - this routine is the top level dispatcher. 1905 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1906 bool NonInheritable = true, bool Inheritable = true); 1907 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1908 bool NonInheritable = true, bool Inheritable = true); 1909 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1910 const AttributeList *AttrList); 1911 1912 void checkUnusedDeclAttributes(Declarator &D); 1913 1914 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1915 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1916 bool CheckNoReturnAttr(const AttributeList &attr); 1917 1918 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1919 bool &IncompleteImpl, unsigned DiagID); 1920 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1921 ObjCMethodDecl *MethodDecl, 1922 bool IsProtocolMethodDecl); 1923 1924 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1925 ObjCMethodDecl *Overridden, 1926 bool IsProtocolMethodDecl); 1927 1928 /// WarnExactTypedMethods - This routine issues a warning if method 1929 /// implementation declaration matches exactly that of its declaration. 1930 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1931 ObjCMethodDecl *MethodDecl, 1932 bool IsProtocolMethodDecl); 1933 1934 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1935 ObjCInterfaceDecl *IDecl); 1936 1937 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1938 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1939 1940 /// CheckProtocolMethodDefs - This routine checks unimplemented 1941 /// methods declared in protocol, and those referenced by it. 1942 /// \param IDecl - Used for checking for methods which may have been 1943 /// inherited. 1944 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1945 ObjCProtocolDecl *PDecl, 1946 bool& IncompleteImpl, 1947 const SelectorSet &InsMap, 1948 const SelectorSet &ClsMap, 1949 ObjCContainerDecl *CDecl); 1950 1951 /// CheckImplementationIvars - This routine checks if the instance variables 1952 /// listed in the implelementation match those listed in the interface. 1953 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1954 ObjCIvarDecl **Fields, unsigned nIvars, 1955 SourceLocation Loc); 1956 1957 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1958 /// remains unimplemented in the class or category @implementation. 1959 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1960 ObjCContainerDecl* IDecl, 1961 bool IncompleteImpl = false); 1962 1963 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1964 /// which must be implemented by this implementation. 1965 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1966 ObjCContainerDecl *CDecl, 1967 const SelectorSet &InsMap); 1968 1969 /// DefaultSynthesizeProperties - This routine default synthesizes all 1970 /// properties which must be synthesized in class's @implementation. 1971 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1972 ObjCInterfaceDecl *IDecl); 1973 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1974 1975 /// CollectImmediateProperties - This routine collects all properties in 1976 /// the class and its conforming protocols; but not those it its super class. 1977 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1978 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1979 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1980 1981 1982 /// LookupPropertyDecl - Looks up a property in the current class and all 1983 /// its protocols. 1984 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1985 IdentifierInfo *II); 1986 1987 /// Called by ActOnProperty to handle @property declarations in 1988 //// class extensions. 1989 Decl *HandlePropertyInClassExtension(Scope *S, 1990 SourceLocation AtLoc, 1991 SourceLocation LParenLoc, 1992 FieldDeclarator &FD, 1993 Selector GetterSel, 1994 Selector SetterSel, 1995 const bool isAssign, 1996 const bool isReadWrite, 1997 const unsigned Attributes, 1998 const unsigned AttributesAsWritten, 1999 bool *isOverridingProperty, 2000 TypeSourceInfo *T, 2001 tok::ObjCKeywordKind MethodImplKind); 2002 2003 /// Called by ActOnProperty and HandlePropertyInClassExtension to 2004 /// handle creating the ObjcPropertyDecl for a category or @interface. 2005 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 2006 ObjCContainerDecl *CDecl, 2007 SourceLocation AtLoc, 2008 SourceLocation LParenLoc, 2009 FieldDeclarator &FD, 2010 Selector GetterSel, 2011 Selector SetterSel, 2012 const bool isAssign, 2013 const bool isReadWrite, 2014 const unsigned Attributes, 2015 const unsigned AttributesAsWritten, 2016 TypeSourceInfo *T, 2017 tok::ObjCKeywordKind MethodImplKind, 2018 DeclContext *lexicalDC = 0); 2019 2020 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2021 /// warning) when atomic property has one but not the other user-declared 2022 /// setter or getter. 2023 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2024 ObjCContainerDecl* IDecl); 2025 2026 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2027 2028 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2029 2030 enum MethodMatchStrategy { 2031 MMS_loose, 2032 MMS_strict 2033 }; 2034 2035 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2036 /// true, or false, accordingly. 2037 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2038 const ObjCMethodDecl *PrevMethod, 2039 MethodMatchStrategy strategy = MMS_strict); 2040 2041 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2042 /// or protocol against those declared in their implementations. 2043 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2044 const SelectorSet &ClsMap, 2045 SelectorSet &InsMapSeen, 2046 SelectorSet &ClsMapSeen, 2047 ObjCImplDecl* IMPDecl, 2048 ObjCContainerDecl* IDecl, 2049 bool &IncompleteImpl, 2050 bool ImmediateClass, 2051 bool WarnCategoryMethodImpl=false); 2052 2053 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2054 /// category matches with those implemented in its primary class and 2055 /// warns each time an exact match is found. 2056 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2057 2058 /// \brief Add the given method to the list of globally-known methods. 2059 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2060 2061private: 2062 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2063 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2064 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2065 2066 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2067 /// optionally warns if there are multiple signatures. 2068 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2069 bool receiverIdOrClass, 2070 bool warn, bool instance); 2071 2072public: 2073 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2074 /// unit are added to a global pool. This allows us to efficiently associate 2075 /// a selector with a method declaraation for purposes of typechecking 2076 /// messages sent to "id" (where the class of the object is unknown). 2077 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2078 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2079 } 2080 2081 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2082 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2083 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2084 } 2085 2086 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2087 /// pool. 2088 void AddAnyMethodToGlobalPool(Decl *D); 2089 2090 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2091 /// there are multiple signatures. 2092 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2093 bool receiverIdOrClass=false, 2094 bool warn=true) { 2095 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2096 warn, /*instance*/true); 2097 } 2098 2099 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2100 /// there are multiple signatures. 2101 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2102 bool receiverIdOrClass=false, 2103 bool warn=true) { 2104 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2105 warn, /*instance*/false); 2106 } 2107 2108 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2109 /// implementation. 2110 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2111 2112 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2113 /// initialization. 2114 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2115 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2116 2117 //===--------------------------------------------------------------------===// 2118 // Statement Parsing Callbacks: SemaStmt.cpp. 2119public: 2120 class FullExprArg { 2121 public: 2122 FullExprArg(Sema &actions) : E(0) { } 2123 2124 // FIXME: The const_cast here is ugly. RValue references would make this 2125 // much nicer (or we could duplicate a bunch of the move semantics 2126 // emulation code from Ownership.h). 2127 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2128 2129 ExprResult release() { 2130 return move(E); 2131 } 2132 2133 Expr *get() const { return E; } 2134 2135 Expr *operator->() { 2136 return E; 2137 } 2138 2139 private: 2140 // FIXME: No need to make the entire Sema class a friend when it's just 2141 // Sema::MakeFullExpr that needs access to the constructor below. 2142 friend class Sema; 2143 2144 explicit FullExprArg(Expr *expr) : E(expr) {} 2145 2146 Expr *E; 2147 }; 2148 2149 FullExprArg MakeFullExpr(Expr *Arg) { 2150 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2151 } 2152 2153 StmtResult ActOnExprStmt(FullExprArg Expr); 2154 2155 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2156 bool HasLeadingEmptyMacro = false); 2157 2158 void ActOnStartOfCompoundStmt(); 2159 void ActOnFinishOfCompoundStmt(); 2160 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2161 MultiStmtArg Elts, 2162 bool isStmtExpr); 2163 2164 /// \brief A RAII object to enter scope of a compound statement. 2165 class CompoundScopeRAII { 2166 public: 2167 CompoundScopeRAII(Sema &S): S(S) { 2168 S.ActOnStartOfCompoundStmt(); 2169 } 2170 2171 ~CompoundScopeRAII() { 2172 S.ActOnFinishOfCompoundStmt(); 2173 } 2174 2175 private: 2176 Sema &S; 2177 }; 2178 2179 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2180 SourceLocation StartLoc, 2181 SourceLocation EndLoc); 2182 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2183 StmtResult ActOnForEachLValueExpr(Expr *E); 2184 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2185 SourceLocation DotDotDotLoc, Expr *RHSVal, 2186 SourceLocation ColonLoc); 2187 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2188 2189 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2190 SourceLocation ColonLoc, 2191 Stmt *SubStmt, Scope *CurScope); 2192 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2193 SourceLocation ColonLoc, Stmt *SubStmt); 2194 2195 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2196 FullExprArg CondVal, Decl *CondVar, 2197 Stmt *ThenVal, 2198 SourceLocation ElseLoc, Stmt *ElseVal); 2199 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2200 Expr *Cond, 2201 Decl *CondVar); 2202 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2203 Stmt *Switch, Stmt *Body); 2204 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2205 FullExprArg Cond, 2206 Decl *CondVar, Stmt *Body); 2207 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2208 SourceLocation WhileLoc, 2209 SourceLocation CondLParen, Expr *Cond, 2210 SourceLocation CondRParen); 2211 2212 StmtResult ActOnForStmt(SourceLocation ForLoc, 2213 SourceLocation LParenLoc, 2214 Stmt *First, FullExprArg Second, 2215 Decl *SecondVar, 2216 FullExprArg Third, 2217 SourceLocation RParenLoc, 2218 Stmt *Body); 2219 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2220 Expr *collection); 2221 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2222 SourceLocation LParenLoc, 2223 Stmt *First, Expr *Second, 2224 SourceLocation RParenLoc, Stmt *Body); 2225 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2226 SourceLocation LParenLoc, Stmt *LoopVar, 2227 SourceLocation ColonLoc, Expr *Collection, 2228 SourceLocation RParenLoc); 2229 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2230 SourceLocation ColonLoc, 2231 Stmt *RangeDecl, Stmt *BeginEndDecl, 2232 Expr *Cond, Expr *Inc, 2233 Stmt *LoopVarDecl, 2234 SourceLocation RParenLoc); 2235 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2236 2237 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2238 SourceLocation LabelLoc, 2239 LabelDecl *TheDecl); 2240 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2241 SourceLocation StarLoc, 2242 Expr *DestExp); 2243 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2244 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2245 2246 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2247 bool AllowFunctionParameters); 2248 2249 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2250 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2251 2252 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2253 bool IsSimple, bool IsVolatile, 2254 unsigned NumOutputs, unsigned NumInputs, 2255 IdentifierInfo **Names, 2256 MultiExprArg Constraints, 2257 MultiExprArg Exprs, 2258 Expr *AsmString, 2259 MultiExprArg Clobbers, 2260 SourceLocation RParenLoc, 2261 bool MSAsm = false); 2262 2263 2264 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2265 SourceLocation StartLoc, 2266 SourceLocation IdLoc, IdentifierInfo *Id, 2267 bool Invalid = false); 2268 2269 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2270 2271 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2272 Decl *Parm, Stmt *Body); 2273 2274 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2275 2276 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2277 MultiStmtArg Catch, Stmt *Finally); 2278 2279 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2280 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2281 Scope *CurScope); 2282 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2283 Expr *operand); 2284 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2285 Expr *SynchExpr, 2286 Stmt *SynchBody); 2287 2288 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2289 2290 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2291 SourceLocation StartLoc, 2292 SourceLocation IdLoc, 2293 IdentifierInfo *Id); 2294 2295 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2296 2297 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2298 Decl *ExDecl, Stmt *HandlerBlock); 2299 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2300 MultiStmtArg Handlers); 2301 2302 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2303 SourceLocation TryLoc, 2304 Stmt *TryBlock, 2305 Stmt *Handler); 2306 2307 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2308 Expr *FilterExpr, 2309 Stmt *Block); 2310 2311 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2312 Stmt *Block); 2313 2314 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2315 2316 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2317 2318 /// \brief If it's a file scoped decl that must warn if not used, keep track 2319 /// of it. 2320 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2321 2322 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2323 /// whose result is unused, warn. 2324 void DiagnoseUnusedExprResult(const Stmt *S); 2325 void DiagnoseUnusedDecl(const NamedDecl *ND); 2326 2327 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2328 /// statement as a \p Body, and it is located on the same line. 2329 /// 2330 /// This helps prevent bugs due to typos, such as: 2331 /// if (condition); 2332 /// do_stuff(); 2333 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2334 const Stmt *Body, 2335 unsigned DiagID); 2336 2337 /// Warn if a for/while loop statement \p S, which is followed by 2338 /// \p PossibleBody, has a suspicious null statement as a body. 2339 void DiagnoseEmptyLoopBody(const Stmt *S, 2340 const Stmt *PossibleBody); 2341 2342 ParsingDeclState PushParsingDeclaration() { 2343 return DelayedDiagnostics.pushParsingDecl(); 2344 } 2345 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2346 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2347 } 2348 2349 typedef ProcessingContextState ParsingClassState; 2350 ParsingClassState PushParsingClass() { 2351 return DelayedDiagnostics.pushContext(); 2352 } 2353 void PopParsingClass(ParsingClassState state) { 2354 DelayedDiagnostics.popContext(state); 2355 } 2356 2357 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2358 SourceLocation Loc, 2359 const ObjCInterfaceDecl *UnknownObjCClass=0); 2360 2361 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2362 2363 bool makeUnavailableInSystemHeader(SourceLocation loc, 2364 StringRef message); 2365 2366 //===--------------------------------------------------------------------===// 2367 // Expression Parsing Callbacks: SemaExpr.cpp. 2368 2369 bool CanUseDecl(NamedDecl *D); 2370 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2371 const ObjCInterfaceDecl *UnknownObjCClass=0); 2372 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2373 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2374 ObjCMethodDecl *Getter, 2375 SourceLocation Loc); 2376 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2377 Expr **Args, unsigned NumArgs); 2378 2379 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2380 Decl *LambdaContextDecl = 0, 2381 bool IsDecltype = false); 2382 2383 void PopExpressionEvaluationContext(); 2384 2385 void DiscardCleanupsInEvaluationContext(); 2386 2387 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2388 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2389 2390 ExprResult ActOnConstantExpression(ExprResult Res); 2391 2392 // Functions for marking a declaration referenced. These functions also 2393 // contain the relevant logic for marking if a reference to a function or 2394 // variable is an odr-use (in the C++11 sense). There are separate variants 2395 // for expressions referring to a decl; these exist because odr-use marking 2396 // needs to be delayed for some constant variables when we build one of the 2397 // named expressions. 2398 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2399 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2400 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2401 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2402 void MarkDeclRefReferenced(DeclRefExpr *E); 2403 void MarkMemberReferenced(MemberExpr *E); 2404 2405 void UpdateMarkingForLValueToRValue(Expr *E); 2406 void CleanupVarDeclMarking(); 2407 2408 enum TryCaptureKind { 2409 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2410 }; 2411 2412 /// \brief Try to capture the given variable. 2413 /// 2414 /// \param Var The variable to capture. 2415 /// 2416 /// \param Loc The location at which the capture occurs. 2417 /// 2418 /// \param Kind The kind of capture, which may be implicit (for either a 2419 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2420 /// 2421 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2422 /// an explicit lambda capture. 2423 /// 2424 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2425 /// captures or diagnose errors. If false, this routine merely check whether 2426 /// the capture can occur without performing the capture itself or complaining 2427 /// if the variable cannot be captured. 2428 /// 2429 /// \param CaptureType Will be set to the type of the field used to capture 2430 /// this variable in the innermost block or lambda. Only valid when the 2431 /// variable can be captured. 2432 /// 2433 /// \param DeclRefType Will be set to the type of a refernce to the capture 2434 /// from within the current scope. Only valid when the variable can be 2435 /// captured. 2436 /// 2437 /// \returns true if an error occurred (i.e., the variable cannot be 2438 /// captured) and false if the capture succeeded. 2439 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2440 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2441 QualType &CaptureType, 2442 QualType &DeclRefType); 2443 2444 /// \brief Try to capture the given variable. 2445 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2446 TryCaptureKind Kind = TryCapture_Implicit, 2447 SourceLocation EllipsisLoc = SourceLocation()); 2448 2449 /// \brief Given a variable, determine the type that a reference to that 2450 /// variable will have in the given scope. 2451 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2452 2453 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2454 void MarkDeclarationsReferencedInExpr(Expr *E, 2455 bool SkipLocalVariables = false); 2456 2457 /// \brief Try to recover by turning the given expression into a 2458 /// call. Returns true if recovery was attempted or an error was 2459 /// emitted; this may also leave the ExprResult invalid. 2460 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2461 bool ForceComplain = false, 2462 bool (*IsPlausibleResult)(QualType) = 0); 2463 2464 /// \brief Figure out if an expression could be turned into a call. 2465 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2466 UnresolvedSetImpl &NonTemplateOverloads); 2467 2468 /// \brief Conditionally issue a diagnostic based on the current 2469 /// evaluation context. 2470 /// 2471 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2472 /// the function body is parsed, and then do a basic reachability analysis to 2473 /// determine if the statement is reachable. If it is unreachable, the 2474 /// diagnostic will not be emitted. 2475 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2476 const PartialDiagnostic &PD); 2477 2478 // Primary Expressions. 2479 SourceRange getExprRange(Expr *E) const; 2480 2481 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2482 SourceLocation TemplateKWLoc, 2483 UnqualifiedId &Id, 2484 bool HasTrailingLParen, bool IsAddressOfOperand, 2485 CorrectionCandidateCallback *CCC = 0); 2486 2487 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2488 TemplateArgumentListInfo &Buffer, 2489 DeclarationNameInfo &NameInfo, 2490 const TemplateArgumentListInfo *&TemplateArgs); 2491 2492 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2493 CorrectionCandidateCallback &CCC, 2494 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2495 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2496 2497 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2498 IdentifierInfo *II, 2499 bool AllowBuiltinCreation=false); 2500 2501 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2502 SourceLocation TemplateKWLoc, 2503 const DeclarationNameInfo &NameInfo, 2504 bool isAddressOfOperand, 2505 const TemplateArgumentListInfo *TemplateArgs); 2506 2507 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2508 ExprValueKind VK, 2509 SourceLocation Loc, 2510 const CXXScopeSpec *SS = 0); 2511 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2512 ExprValueKind VK, 2513 const DeclarationNameInfo &NameInfo, 2514 const CXXScopeSpec *SS = 0); 2515 ExprResult 2516 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2517 SourceLocation nameLoc, 2518 IndirectFieldDecl *indirectField, 2519 Expr *baseObjectExpr = 0, 2520 SourceLocation opLoc = SourceLocation()); 2521 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2522 SourceLocation TemplateKWLoc, 2523 LookupResult &R, 2524 const TemplateArgumentListInfo *TemplateArgs); 2525 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2526 SourceLocation TemplateKWLoc, 2527 LookupResult &R, 2528 const TemplateArgumentListInfo *TemplateArgs, 2529 bool IsDefiniteInstance); 2530 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2531 const LookupResult &R, 2532 bool HasTrailingLParen); 2533 2534 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2535 const DeclarationNameInfo &NameInfo); 2536 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2537 SourceLocation TemplateKWLoc, 2538 const DeclarationNameInfo &NameInfo, 2539 const TemplateArgumentListInfo *TemplateArgs); 2540 2541 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2542 LookupResult &R, 2543 bool NeedsADL); 2544 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2545 const DeclarationNameInfo &NameInfo, 2546 NamedDecl *D); 2547 2548 ExprResult BuildLiteralOperatorCall(IdentifierInfo *UDSuffix, 2549 SourceLocation UDSuffixLoc, 2550 ArrayRef<Expr*> Args, 2551 SourceLocation LitEndLoc); 2552 2553 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2554 ExprResult ActOnIntegerConstant(SourceLocation Loc, uint64_t Val); 2555 ExprResult ActOnNumericConstant(const Token &Tok); 2556 ExprResult ActOnCharacterConstant(const Token &Tok); 2557 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2558 ExprResult ActOnParenListExpr(SourceLocation L, 2559 SourceLocation R, 2560 MultiExprArg Val); 2561 2562 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2563 /// fragments (e.g. "foo" "bar" L"baz"). 2564 ExprResult ActOnStringLiteral(const Token *StringToks, 2565 unsigned NumStringToks); 2566 2567 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2568 SourceLocation DefaultLoc, 2569 SourceLocation RParenLoc, 2570 Expr *ControllingExpr, 2571 MultiTypeArg ArgTypes, 2572 MultiExprArg ArgExprs); 2573 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2574 SourceLocation DefaultLoc, 2575 SourceLocation RParenLoc, 2576 Expr *ControllingExpr, 2577 TypeSourceInfo **Types, 2578 Expr **Exprs, 2579 unsigned NumAssocs); 2580 2581 // Binary/Unary Operators. 'Tok' is the token for the operator. 2582 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2583 Expr *InputExpr); 2584 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2585 UnaryOperatorKind Opc, Expr *Input); 2586 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2587 tok::TokenKind Op, Expr *Input); 2588 2589 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2590 SourceLocation OpLoc, 2591 UnaryExprOrTypeTrait ExprKind, 2592 SourceRange R); 2593 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2594 UnaryExprOrTypeTrait ExprKind); 2595 ExprResult 2596 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2597 UnaryExprOrTypeTrait ExprKind, 2598 bool IsType, void *TyOrEx, 2599 const SourceRange &ArgRange); 2600 2601 ExprResult CheckPlaceholderExpr(Expr *E); 2602 bool CheckVecStepExpr(Expr *E); 2603 2604 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2605 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2606 SourceRange ExprRange, 2607 UnaryExprOrTypeTrait ExprKind); 2608 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2609 SourceLocation OpLoc, 2610 IdentifierInfo &Name, 2611 SourceLocation NameLoc, 2612 SourceLocation RParenLoc); 2613 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2614 tok::TokenKind Kind, Expr *Input); 2615 2616 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2617 Expr *Idx, SourceLocation RLoc); 2618 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2619 Expr *Idx, SourceLocation RLoc); 2620 2621 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2622 SourceLocation OpLoc, bool IsArrow, 2623 CXXScopeSpec &SS, 2624 SourceLocation TemplateKWLoc, 2625 NamedDecl *FirstQualifierInScope, 2626 const DeclarationNameInfo &NameInfo, 2627 const TemplateArgumentListInfo *TemplateArgs); 2628 2629 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2630 SourceLocation OpLoc, bool IsArrow, 2631 const CXXScopeSpec &SS, 2632 SourceLocation TemplateKWLoc, 2633 NamedDecl *FirstQualifierInScope, 2634 LookupResult &R, 2635 const TemplateArgumentListInfo *TemplateArgs, 2636 bool SuppressQualifierCheck = false); 2637 2638 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2639 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2640 bool &IsArrow, SourceLocation OpLoc, 2641 CXXScopeSpec &SS, 2642 Decl *ObjCImpDecl, 2643 bool HasTemplateArgs); 2644 2645 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2646 const CXXScopeSpec &SS, 2647 const LookupResult &R); 2648 2649 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2650 bool IsArrow, SourceLocation OpLoc, 2651 const CXXScopeSpec &SS, 2652 SourceLocation TemplateKWLoc, 2653 NamedDecl *FirstQualifierInScope, 2654 const DeclarationNameInfo &NameInfo, 2655 const TemplateArgumentListInfo *TemplateArgs); 2656 2657 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2658 SourceLocation OpLoc, 2659 tok::TokenKind OpKind, 2660 CXXScopeSpec &SS, 2661 SourceLocation TemplateKWLoc, 2662 UnqualifiedId &Member, 2663 Decl *ObjCImpDecl, 2664 bool HasTrailingLParen); 2665 2666 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2667 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2668 FunctionDecl *FDecl, 2669 const FunctionProtoType *Proto, 2670 Expr **Args, unsigned NumArgs, 2671 SourceLocation RParenLoc, 2672 bool ExecConfig = false); 2673 void CheckStaticArrayArgument(SourceLocation CallLoc, 2674 ParmVarDecl *Param, 2675 const Expr *ArgExpr); 2676 2677 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2678 /// This provides the location of the left/right parens and a list of comma 2679 /// locations. 2680 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2681 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2682 Expr *ExecConfig = 0, bool IsExecConfig = false); 2683 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2684 SourceLocation LParenLoc, 2685 Expr **Args, unsigned NumArgs, 2686 SourceLocation RParenLoc, 2687 Expr *Config = 0, 2688 bool IsExecConfig = false); 2689 2690 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2691 MultiExprArg ExecConfig, 2692 SourceLocation GGGLoc); 2693 2694 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2695 Declarator &D, ParsedType &Ty, 2696 SourceLocation RParenLoc, Expr *CastExpr); 2697 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2698 TypeSourceInfo *Ty, 2699 SourceLocation RParenLoc, 2700 Expr *Op); 2701 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2702 2703 /// \brief Build an altivec or OpenCL literal. 2704 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2705 SourceLocation RParenLoc, Expr *E, 2706 TypeSourceInfo *TInfo); 2707 2708 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2709 2710 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2711 ParsedType Ty, 2712 SourceLocation RParenLoc, 2713 Expr *InitExpr); 2714 2715 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2716 TypeSourceInfo *TInfo, 2717 SourceLocation RParenLoc, 2718 Expr *LiteralExpr); 2719 2720 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2721 MultiExprArg InitArgList, 2722 SourceLocation RBraceLoc); 2723 2724 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2725 SourceLocation Loc, 2726 bool GNUSyntax, 2727 ExprResult Init); 2728 2729 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2730 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2731 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2732 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2733 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2734 Expr *LHSExpr, Expr *RHSExpr); 2735 2736 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2737 /// in the case of a the GNU conditional expr extension. 2738 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2739 SourceLocation ColonLoc, 2740 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2741 2742 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2743 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2744 LabelDecl *TheDecl); 2745 2746 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2747 SourceLocation RPLoc); // "({..})" 2748 2749 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2750 struct OffsetOfComponent { 2751 SourceLocation LocStart, LocEnd; 2752 bool isBrackets; // true if [expr], false if .ident 2753 union { 2754 IdentifierInfo *IdentInfo; 2755 Expr *E; 2756 } U; 2757 }; 2758 2759 /// __builtin_offsetof(type, a.b[123][456].c) 2760 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2761 TypeSourceInfo *TInfo, 2762 OffsetOfComponent *CompPtr, 2763 unsigned NumComponents, 2764 SourceLocation RParenLoc); 2765 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2766 SourceLocation BuiltinLoc, 2767 SourceLocation TypeLoc, 2768 ParsedType ParsedArgTy, 2769 OffsetOfComponent *CompPtr, 2770 unsigned NumComponents, 2771 SourceLocation RParenLoc); 2772 2773 // __builtin_choose_expr(constExpr, expr1, expr2) 2774 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2775 Expr *CondExpr, Expr *LHSExpr, 2776 Expr *RHSExpr, SourceLocation RPLoc); 2777 2778 // __builtin_va_arg(expr, type) 2779 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2780 SourceLocation RPLoc); 2781 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2782 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2783 2784 // __null 2785 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2786 2787 bool CheckCaseExpression(Expr *E); 2788 2789 /// \brief Describes the result of an "if-exists" condition check. 2790 enum IfExistsResult { 2791 /// \brief The symbol exists. 2792 IER_Exists, 2793 2794 /// \brief The symbol does not exist. 2795 IER_DoesNotExist, 2796 2797 /// \brief The name is a dependent name, so the results will differ 2798 /// from one instantiation to the next. 2799 IER_Dependent, 2800 2801 /// \brief An error occurred. 2802 IER_Error 2803 }; 2804 2805 IfExistsResult 2806 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2807 const DeclarationNameInfo &TargetNameInfo); 2808 2809 IfExistsResult 2810 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2811 bool IsIfExists, CXXScopeSpec &SS, 2812 UnqualifiedId &Name); 2813 2814 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2815 bool IsIfExists, 2816 NestedNameSpecifierLoc QualifierLoc, 2817 DeclarationNameInfo NameInfo, 2818 Stmt *Nested); 2819 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2820 bool IsIfExists, 2821 CXXScopeSpec &SS, UnqualifiedId &Name, 2822 Stmt *Nested); 2823 2824 //===------------------------- "Block" Extension ------------------------===// 2825 2826 /// ActOnBlockStart - This callback is invoked when a block literal is 2827 /// started. 2828 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2829 2830 /// ActOnBlockArguments - This callback allows processing of block arguments. 2831 /// If there are no arguments, this is still invoked. 2832 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2833 2834 /// ActOnBlockError - If there is an error parsing a block, this callback 2835 /// is invoked to pop the information about the block from the action impl. 2836 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2837 2838 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2839 /// literal was successfully completed. ^(int x){...} 2840 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2841 Scope *CurScope); 2842 2843 //===---------------------------- OpenCL Features -----------------------===// 2844 2845 /// __builtin_astype(...) 2846 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2847 SourceLocation BuiltinLoc, 2848 SourceLocation RParenLoc); 2849 2850 //===---------------------------- C++ Features --------------------------===// 2851 2852 // Act on C++ namespaces 2853 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2854 SourceLocation NamespaceLoc, 2855 SourceLocation IdentLoc, 2856 IdentifierInfo *Ident, 2857 SourceLocation LBrace, 2858 AttributeList *AttrList); 2859 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2860 2861 NamespaceDecl *getStdNamespace() const; 2862 NamespaceDecl *getOrCreateStdNamespace(); 2863 2864 CXXRecordDecl *getStdBadAlloc() const; 2865 2866 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2867 /// it is and Element is not NULL, assigns the element type to Element. 2868 bool isStdInitializerList(QualType Ty, QualType *Element); 2869 2870 /// \brief Looks for the std::initializer_list template and instantiates it 2871 /// with Element, or emits an error if it's not found. 2872 /// 2873 /// \returns The instantiated template, or null on error. 2874 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2875 2876 /// \brief Determine whether Ctor is an initializer-list constructor, as 2877 /// defined in [dcl.init.list]p2. 2878 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2879 2880 Decl *ActOnUsingDirective(Scope *CurScope, 2881 SourceLocation UsingLoc, 2882 SourceLocation NamespcLoc, 2883 CXXScopeSpec &SS, 2884 SourceLocation IdentLoc, 2885 IdentifierInfo *NamespcName, 2886 AttributeList *AttrList); 2887 2888 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2889 2890 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2891 SourceLocation NamespaceLoc, 2892 SourceLocation AliasLoc, 2893 IdentifierInfo *Alias, 2894 CXXScopeSpec &SS, 2895 SourceLocation IdentLoc, 2896 IdentifierInfo *Ident); 2897 2898 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2899 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2900 const LookupResult &PreviousDecls); 2901 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2902 NamedDecl *Target); 2903 2904 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2905 bool isTypeName, 2906 const CXXScopeSpec &SS, 2907 SourceLocation NameLoc, 2908 const LookupResult &Previous); 2909 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2910 const CXXScopeSpec &SS, 2911 SourceLocation NameLoc); 2912 2913 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2914 SourceLocation UsingLoc, 2915 CXXScopeSpec &SS, 2916 const DeclarationNameInfo &NameInfo, 2917 AttributeList *AttrList, 2918 bool IsInstantiation, 2919 bool IsTypeName, 2920 SourceLocation TypenameLoc); 2921 2922 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2923 2924 Decl *ActOnUsingDeclaration(Scope *CurScope, 2925 AccessSpecifier AS, 2926 bool HasUsingKeyword, 2927 SourceLocation UsingLoc, 2928 CXXScopeSpec &SS, 2929 UnqualifiedId &Name, 2930 AttributeList *AttrList, 2931 bool IsTypeName, 2932 SourceLocation TypenameLoc); 2933 Decl *ActOnAliasDeclaration(Scope *CurScope, 2934 AccessSpecifier AS, 2935 MultiTemplateParamsArg TemplateParams, 2936 SourceLocation UsingLoc, 2937 UnqualifiedId &Name, 2938 TypeResult Type); 2939 2940 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2941 /// and sets it as the initializer for the the passed in VarDecl. 2942 bool InitializeVarWithConstructor(VarDecl *VD, 2943 CXXConstructorDecl *Constructor, 2944 MultiExprArg Exprs, 2945 bool HadMultipleCandidates); 2946 2947 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2948 /// including handling of its default argument expressions. 2949 /// 2950 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2951 ExprResult 2952 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2953 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2954 bool HadMultipleCandidates, bool RequiresZeroInit, 2955 unsigned ConstructKind, SourceRange ParenRange); 2956 2957 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2958 // the constructor can be elidable? 2959 ExprResult 2960 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2961 CXXConstructorDecl *Constructor, bool Elidable, 2962 MultiExprArg Exprs, bool HadMultipleCandidates, 2963 bool RequiresZeroInit, unsigned ConstructKind, 2964 SourceRange ParenRange); 2965 2966 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2967 /// the default expr if needed. 2968 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2969 FunctionDecl *FD, 2970 ParmVarDecl *Param); 2971 2972 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2973 /// constructed variable. 2974 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2975 2976 /// \brief Helper class that collects exception specifications for 2977 /// implicitly-declared special member functions. 2978 class ImplicitExceptionSpecification { 2979 // Pointer to allow copying 2980 ASTContext *Context; 2981 // We order exception specifications thus: 2982 // noexcept is the most restrictive, but is only used in C++0x. 2983 // throw() comes next. 2984 // Then a throw(collected exceptions) 2985 // Finally no specification. 2986 // throw(...) is used instead if any called function uses it. 2987 // 2988 // If this exception specification cannot be known yet (for instance, 2989 // because this is the exception specification for a defaulted default 2990 // constructor and we haven't finished parsing the deferred parts of the 2991 // class yet), the C++0x standard does not specify how to behave. We 2992 // record this as an 'unknown' exception specification, which overrules 2993 // any other specification (even 'none', to keep this rule simple). 2994 ExceptionSpecificationType ComputedEST; 2995 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2996 SmallVector<QualType, 4> Exceptions; 2997 2998 void ClearExceptions() { 2999 ExceptionsSeen.clear(); 3000 Exceptions.clear(); 3001 } 3002 3003 public: 3004 explicit ImplicitExceptionSpecification(ASTContext &Context) 3005 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 3006 if (!Context.getLangOptions().CPlusPlus0x) 3007 ComputedEST = EST_DynamicNone; 3008 } 3009 3010 /// \brief Get the computed exception specification type. 3011 ExceptionSpecificationType getExceptionSpecType() const { 3012 assert(ComputedEST != EST_ComputedNoexcept && 3013 "noexcept(expr) should not be a possible result"); 3014 return ComputedEST; 3015 } 3016 3017 /// \brief The number of exceptions in the exception specification. 3018 unsigned size() const { return Exceptions.size(); } 3019 3020 /// \brief The set of exceptions in the exception specification. 3021 const QualType *data() const { return Exceptions.data(); } 3022 3023 /// \brief Integrate another called method into the collected data. 3024 void CalledDecl(CXXMethodDecl *Method); 3025 3026 /// \brief Integrate an invoked expression into the collected data. 3027 void CalledExpr(Expr *E); 3028 3029 /// \brief Specify that the exception specification can't be detemined yet. 3030 void SetDelayed() { 3031 ClearExceptions(); 3032 ComputedEST = EST_Delayed; 3033 } 3034 3035 FunctionProtoType::ExtProtoInfo getEPI() const { 3036 FunctionProtoType::ExtProtoInfo EPI; 3037 EPI.ExceptionSpecType = getExceptionSpecType(); 3038 EPI.NumExceptions = size(); 3039 EPI.Exceptions = data(); 3040 return EPI; 3041 } 3042 }; 3043 3044 /// \brief Determine what sort of exception specification a defaulted 3045 /// copy constructor of a class will have. 3046 ImplicitExceptionSpecification 3047 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3048 3049 /// \brief Determine what sort of exception specification a defaulted 3050 /// default constructor of a class will have, and whether the parameter 3051 /// will be const. 3052 std::pair<ImplicitExceptionSpecification, bool> 3053 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3054 3055 /// \brief Determine what sort of exception specification a defautled 3056 /// copy assignment operator of a class will have, and whether the 3057 /// parameter will be const. 3058 std::pair<ImplicitExceptionSpecification, bool> 3059 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3060 3061 /// \brief Determine what sort of exception specification a defaulted move 3062 /// constructor of a class will have. 3063 ImplicitExceptionSpecification 3064 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3065 3066 /// \brief Determine what sort of exception specification a defaulted move 3067 /// assignment operator of a class will have. 3068 ImplicitExceptionSpecification 3069 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3070 3071 /// \brief Determine what sort of exception specification a defaulted 3072 /// destructor of a class will have. 3073 ImplicitExceptionSpecification 3074 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3075 3076 /// \brief Determine if a special member function should have a deleted 3077 /// definition when it is defaulted. 3078 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 3079 3080 /// \brief Declare the implicit default constructor for the given class. 3081 /// 3082 /// \param ClassDecl The class declaration into which the implicit 3083 /// default constructor will be added. 3084 /// 3085 /// \returns The implicitly-declared default constructor. 3086 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3087 CXXRecordDecl *ClassDecl); 3088 3089 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3090 /// defining this constructor as the default constructor. 3091 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3092 CXXConstructorDecl *Constructor); 3093 3094 /// \brief Declare the implicit destructor for the given class. 3095 /// 3096 /// \param ClassDecl The class declaration into which the implicit 3097 /// destructor will be added. 3098 /// 3099 /// \returns The implicitly-declared destructor. 3100 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3101 3102 /// DefineImplicitDestructor - Checks for feasibility of 3103 /// defining this destructor as the default destructor. 3104 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3105 CXXDestructorDecl *Destructor); 3106 3107 /// \brief Build an exception spec for destructors that don't have one. 3108 /// 3109 /// C++11 says that user-defined destructors with no exception spec get one 3110 /// that looks as if the destructor was implicitly declared. 3111 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3112 CXXDestructorDecl *Destructor); 3113 3114 /// \brief Declare all inherited constructors for the given class. 3115 /// 3116 /// \param ClassDecl The class declaration into which the inherited 3117 /// constructors will be added. 3118 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3119 3120 /// \brief Declare the implicit copy constructor for the given class. 3121 /// 3122 /// \param ClassDecl The class declaration into which the implicit 3123 /// copy constructor will be added. 3124 /// 3125 /// \returns The implicitly-declared copy constructor. 3126 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3127 3128 /// DefineImplicitCopyConstructor - Checks for feasibility of 3129 /// defining this constructor as the copy constructor. 3130 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3131 CXXConstructorDecl *Constructor); 3132 3133 /// \brief Declare the implicit move constructor for the given class. 3134 /// 3135 /// \param ClassDecl The Class declaration into which the implicit 3136 /// move constructor will be added. 3137 /// 3138 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3139 /// declared. 3140 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3141 3142 /// DefineImplicitMoveConstructor - Checks for feasibility of 3143 /// defining this constructor as the move constructor. 3144 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3145 CXXConstructorDecl *Constructor); 3146 3147 /// \brief Declare the implicit copy assignment operator for the given class. 3148 /// 3149 /// \param ClassDecl The class declaration into which the implicit 3150 /// copy assignment operator will be added. 3151 /// 3152 /// \returns The implicitly-declared copy assignment operator. 3153 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3154 3155 /// \brief Defines an implicitly-declared copy assignment operator. 3156 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3157 CXXMethodDecl *MethodDecl); 3158 3159 /// \brief Declare the implicit move assignment operator for the given class. 3160 /// 3161 /// \param ClassDecl The Class declaration into which the implicit 3162 /// move assignment operator will be added. 3163 /// 3164 /// \returns The implicitly-declared move assignment operator, or NULL if it 3165 /// wasn't declared. 3166 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3167 3168 /// \brief Defines an implicitly-declared move assignment operator. 3169 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3170 CXXMethodDecl *MethodDecl); 3171 3172 /// \brief Force the declaration of any implicitly-declared members of this 3173 /// class. 3174 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3175 3176 /// \brief Determine whether the given function is an implicitly-deleted 3177 /// special member function. 3178 bool isImplicitlyDeleted(FunctionDecl *FD); 3179 3180 /// MaybeBindToTemporary - If the passed in expression has a record type with 3181 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3182 /// it simply returns the passed in expression. 3183 ExprResult MaybeBindToTemporary(Expr *E); 3184 3185 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3186 MultiExprArg ArgsPtr, 3187 SourceLocation Loc, 3188 ASTOwningVector<Expr*> &ConvertedArgs, 3189 bool AllowExplicit = false); 3190 3191 ParsedType getDestructorName(SourceLocation TildeLoc, 3192 IdentifierInfo &II, SourceLocation NameLoc, 3193 Scope *S, CXXScopeSpec &SS, 3194 ParsedType ObjectType, 3195 bool EnteringContext); 3196 3197 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3198 3199 // Checks that reinterpret casts don't have undefined behavior. 3200 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3201 bool IsDereference, SourceRange Range); 3202 3203 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3204 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3205 tok::TokenKind Kind, 3206 SourceLocation LAngleBracketLoc, 3207 Declarator &D, 3208 SourceLocation RAngleBracketLoc, 3209 SourceLocation LParenLoc, 3210 Expr *E, 3211 SourceLocation RParenLoc); 3212 3213 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3214 tok::TokenKind Kind, 3215 TypeSourceInfo *Ty, 3216 Expr *E, 3217 SourceRange AngleBrackets, 3218 SourceRange Parens); 3219 3220 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3221 SourceLocation TypeidLoc, 3222 TypeSourceInfo *Operand, 3223 SourceLocation RParenLoc); 3224 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3225 SourceLocation TypeidLoc, 3226 Expr *Operand, 3227 SourceLocation RParenLoc); 3228 3229 /// ActOnCXXTypeid - Parse typeid( something ). 3230 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3231 SourceLocation LParenLoc, bool isType, 3232 void *TyOrExpr, 3233 SourceLocation RParenLoc); 3234 3235 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3236 SourceLocation TypeidLoc, 3237 TypeSourceInfo *Operand, 3238 SourceLocation RParenLoc); 3239 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3240 SourceLocation TypeidLoc, 3241 Expr *Operand, 3242 SourceLocation RParenLoc); 3243 3244 /// ActOnCXXUuidof - Parse __uuidof( something ). 3245 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3246 SourceLocation LParenLoc, bool isType, 3247 void *TyOrExpr, 3248 SourceLocation RParenLoc); 3249 3250 3251 //// ActOnCXXThis - Parse 'this' pointer. 3252 ExprResult ActOnCXXThis(SourceLocation loc); 3253 3254 /// \brief Try to retrieve the type of the 'this' pointer. 3255 /// 3256 /// \param Capture If true, capture 'this' in this context. 3257 /// 3258 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3259 QualType getCurrentThisType(); 3260 3261 /// \brief Make sure the value of 'this' is actually available in the current 3262 /// context, if it is a potentially evaluated context. 3263 /// 3264 /// \param Loc The location at which the capture of 'this' occurs. 3265 /// 3266 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3267 /// capture list. 3268 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3269 3270 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3271 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3272 3273 3274 /// ActOnObjCBoolLiteral - Parse {__objc_yes,__objc_no} literals. 3275 ExprResult ActOnObjCBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3276 3277 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3278 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3279 3280 //// ActOnCXXThrow - Parse throw expressions. 3281 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3282 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3283 bool IsThrownVarInScope); 3284 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3285 bool IsThrownVarInScope); 3286 3287 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3288 /// Can be interpreted either as function-style casting ("int(x)") 3289 /// or class type construction ("ClassType(x,y,z)") 3290 /// or creation of a value-initialized type ("int()"). 3291 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3292 SourceLocation LParenLoc, 3293 MultiExprArg Exprs, 3294 SourceLocation RParenLoc); 3295 3296 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3297 SourceLocation LParenLoc, 3298 MultiExprArg Exprs, 3299 SourceLocation RParenLoc); 3300 3301 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3302 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3303 SourceLocation PlacementLParen, 3304 MultiExprArg PlacementArgs, 3305 SourceLocation PlacementRParen, 3306 SourceRange TypeIdParens, Declarator &D, 3307 Expr *Initializer); 3308 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3309 SourceLocation PlacementLParen, 3310 MultiExprArg PlacementArgs, 3311 SourceLocation PlacementRParen, 3312 SourceRange TypeIdParens, 3313 QualType AllocType, 3314 TypeSourceInfo *AllocTypeInfo, 3315 Expr *ArraySize, 3316 SourceRange DirectInitRange, 3317 Expr *Initializer, 3318 bool TypeMayContainAuto = true); 3319 3320 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3321 SourceRange R); 3322 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3323 bool UseGlobal, QualType AllocType, bool IsArray, 3324 Expr **PlaceArgs, unsigned NumPlaceArgs, 3325 FunctionDecl *&OperatorNew, 3326 FunctionDecl *&OperatorDelete); 3327 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3328 DeclarationName Name, Expr** Args, 3329 unsigned NumArgs, DeclContext *Ctx, 3330 bool AllowMissing, FunctionDecl *&Operator, 3331 bool Diagnose = true); 3332 void DeclareGlobalNewDelete(); 3333 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3334 QualType Argument, 3335 bool addMallocAttr = false); 3336 3337 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3338 DeclarationName Name, FunctionDecl* &Operator, 3339 bool Diagnose = true); 3340 3341 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3342 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3343 bool UseGlobal, bool ArrayForm, 3344 Expr *Operand); 3345 3346 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3347 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3348 SourceLocation StmtLoc, 3349 bool ConvertToBoolean); 3350 3351 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3352 Expr *Operand, SourceLocation RParen); 3353 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3354 SourceLocation RParen); 3355 3356 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3357 /// pseudo-functions. 3358 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3359 SourceLocation KWLoc, 3360 ParsedType Ty, 3361 SourceLocation RParen); 3362 3363 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3364 SourceLocation KWLoc, 3365 TypeSourceInfo *T, 3366 SourceLocation RParen); 3367 3368 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3369 /// pseudo-functions. 3370 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3371 SourceLocation KWLoc, 3372 ParsedType LhsTy, 3373 ParsedType RhsTy, 3374 SourceLocation RParen); 3375 3376 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3377 SourceLocation KWLoc, 3378 TypeSourceInfo *LhsT, 3379 TypeSourceInfo *RhsT, 3380 SourceLocation RParen); 3381 3382 /// \brief Parsed one of the type trait support pseudo-functions. 3383 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3384 ArrayRef<ParsedType> Args, 3385 SourceLocation RParenLoc); 3386 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3387 ArrayRef<TypeSourceInfo *> Args, 3388 SourceLocation RParenLoc); 3389 3390 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3391 /// pseudo-functions. 3392 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3393 SourceLocation KWLoc, 3394 ParsedType LhsTy, 3395 Expr *DimExpr, 3396 SourceLocation RParen); 3397 3398 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3399 SourceLocation KWLoc, 3400 TypeSourceInfo *TSInfo, 3401 Expr *DimExpr, 3402 SourceLocation RParen); 3403 3404 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3405 /// pseudo-functions. 3406 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3407 SourceLocation KWLoc, 3408 Expr *Queried, 3409 SourceLocation RParen); 3410 3411 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3412 SourceLocation KWLoc, 3413 Expr *Queried, 3414 SourceLocation RParen); 3415 3416 ExprResult ActOnStartCXXMemberReference(Scope *S, 3417 Expr *Base, 3418 SourceLocation OpLoc, 3419 tok::TokenKind OpKind, 3420 ParsedType &ObjectType, 3421 bool &MayBePseudoDestructor); 3422 3423 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3424 3425 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3426 SourceLocation OpLoc, 3427 tok::TokenKind OpKind, 3428 const CXXScopeSpec &SS, 3429 TypeSourceInfo *ScopeType, 3430 SourceLocation CCLoc, 3431 SourceLocation TildeLoc, 3432 PseudoDestructorTypeStorage DestroyedType, 3433 bool HasTrailingLParen); 3434 3435 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3436 SourceLocation OpLoc, 3437 tok::TokenKind OpKind, 3438 CXXScopeSpec &SS, 3439 UnqualifiedId &FirstTypeName, 3440 SourceLocation CCLoc, 3441 SourceLocation TildeLoc, 3442 UnqualifiedId &SecondTypeName, 3443 bool HasTrailingLParen); 3444 3445 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3446 SourceLocation OpLoc, 3447 tok::TokenKind OpKind, 3448 SourceLocation TildeLoc, 3449 const DeclSpec& DS, 3450 bool HasTrailingLParen); 3451 3452 /// MaybeCreateExprWithCleanups - If the current full-expression 3453 /// requires any cleanups, surround it with a ExprWithCleanups node. 3454 /// Otherwise, just returns the passed-in expression. 3455 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3456 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3457 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3458 3459 ExprResult ActOnFinishFullExpr(Expr *Expr); 3460 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3461 3462 // Marks SS invalid if it represents an incomplete type. 3463 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3464 3465 DeclContext *computeDeclContext(QualType T); 3466 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3467 bool EnteringContext = false); 3468 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3469 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3470 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3471 3472 /// \brief The parser has parsed a global nested-name-specifier '::'. 3473 /// 3474 /// \param S The scope in which this nested-name-specifier occurs. 3475 /// 3476 /// \param CCLoc The location of the '::'. 3477 /// 3478 /// \param SS The nested-name-specifier, which will be updated in-place 3479 /// to reflect the parsed nested-name-specifier. 3480 /// 3481 /// \returns true if an error occurred, false otherwise. 3482 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3483 CXXScopeSpec &SS); 3484 3485 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3486 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3487 3488 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3489 SourceLocation IdLoc, 3490 IdentifierInfo &II, 3491 ParsedType ObjectType); 3492 3493 bool BuildCXXNestedNameSpecifier(Scope *S, 3494 IdentifierInfo &Identifier, 3495 SourceLocation IdentifierLoc, 3496 SourceLocation CCLoc, 3497 QualType ObjectType, 3498 bool EnteringContext, 3499 CXXScopeSpec &SS, 3500 NamedDecl *ScopeLookupResult, 3501 bool ErrorRecoveryLookup); 3502 3503 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3504 /// 3505 /// \param S The scope in which this nested-name-specifier occurs. 3506 /// 3507 /// \param Identifier The identifier preceding the '::'. 3508 /// 3509 /// \param IdentifierLoc The location of the identifier. 3510 /// 3511 /// \param CCLoc The location of the '::'. 3512 /// 3513 /// \param ObjectType The type of the object, if we're parsing 3514 /// nested-name-specifier in a member access expression. 3515 /// 3516 /// \param EnteringContext Whether we're entering the context nominated by 3517 /// this nested-name-specifier. 3518 /// 3519 /// \param SS The nested-name-specifier, which is both an input 3520 /// parameter (the nested-name-specifier before this type) and an 3521 /// output parameter (containing the full nested-name-specifier, 3522 /// including this new type). 3523 /// 3524 /// \returns true if an error occurred, false otherwise. 3525 bool ActOnCXXNestedNameSpecifier(Scope *S, 3526 IdentifierInfo &Identifier, 3527 SourceLocation IdentifierLoc, 3528 SourceLocation CCLoc, 3529 ParsedType ObjectType, 3530 bool EnteringContext, 3531 CXXScopeSpec &SS); 3532 3533 ExprResult ActOnDecltypeExpression(Expr *E); 3534 3535 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3536 const DeclSpec &DS, 3537 SourceLocation ColonColonLoc); 3538 3539 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3540 IdentifierInfo &Identifier, 3541 SourceLocation IdentifierLoc, 3542 SourceLocation ColonLoc, 3543 ParsedType ObjectType, 3544 bool EnteringContext); 3545 3546 /// \brief The parser has parsed a nested-name-specifier 3547 /// 'template[opt] template-name < template-args >::'. 3548 /// 3549 /// \param S The scope in which this nested-name-specifier occurs. 3550 /// 3551 /// \param SS The nested-name-specifier, which is both an input 3552 /// parameter (the nested-name-specifier before this type) and an 3553 /// output parameter (containing the full nested-name-specifier, 3554 /// including this new type). 3555 /// 3556 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3557 /// \param TemplateName The template name. 3558 /// \param TemplateNameLoc The location of the template name. 3559 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3560 /// \param TemplateArgs The template arguments. 3561 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3562 /// \param CCLoc The location of the '::'. 3563 /// 3564 /// \param EnteringContext Whether we're entering the context of the 3565 /// nested-name-specifier. 3566 /// 3567 /// 3568 /// \returns true if an error occurred, false otherwise. 3569 bool ActOnCXXNestedNameSpecifier(Scope *S, 3570 CXXScopeSpec &SS, 3571 SourceLocation TemplateKWLoc, 3572 TemplateTy Template, 3573 SourceLocation TemplateNameLoc, 3574 SourceLocation LAngleLoc, 3575 ASTTemplateArgsPtr TemplateArgs, 3576 SourceLocation RAngleLoc, 3577 SourceLocation CCLoc, 3578 bool EnteringContext); 3579 3580 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3581 /// that the parser can use later to reconstruct the given 3582 /// nested-name-specifier. 3583 /// 3584 /// \param SS A nested-name-specifier. 3585 /// 3586 /// \returns A pointer containing all of the information in the 3587 /// nested-name-specifier \p SS. 3588 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3589 3590 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3591 /// the nested-name-specifier structure. 3592 /// 3593 /// \param Annotation The annotation pointer, produced by 3594 /// \c SaveNestedNameSpecifierAnnotation(). 3595 /// 3596 /// \param AnnotationRange The source range corresponding to the annotation. 3597 /// 3598 /// \param SS The nested-name-specifier that will be updated with the contents 3599 /// of the annotation pointer. 3600 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3601 SourceRange AnnotationRange, 3602 CXXScopeSpec &SS); 3603 3604 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3605 3606 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3607 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3608 /// After this method is called, according to [C++ 3.4.3p3], names should be 3609 /// looked up in the declarator-id's scope, until the declarator is parsed and 3610 /// ActOnCXXExitDeclaratorScope is called. 3611 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3612 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3613 3614 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3615 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3616 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3617 /// Used to indicate that names should revert to being looked up in the 3618 /// defining scope. 3619 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3620 3621 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3622 /// initializer for the declaration 'Dcl'. 3623 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3624 /// static data member of class X, names should be looked up in the scope of 3625 /// class X. 3626 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3627 3628 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3629 /// initializer for the declaration 'Dcl'. 3630 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3631 3632 /// \brief Create a new lambda closure type. 3633 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3634 bool KnownDependent = false); 3635 3636 /// \brief Start the definition of a lambda expression. 3637 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3638 SourceRange IntroducerRange, 3639 TypeSourceInfo *MethodType, 3640 SourceLocation EndLoc, 3641 llvm::ArrayRef<ParmVarDecl *> Params); 3642 3643 /// \brief Introduce the scope for a lambda expression. 3644 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3645 SourceRange IntroducerRange, 3646 LambdaCaptureDefault CaptureDefault, 3647 bool ExplicitParams, 3648 bool ExplicitResultType, 3649 bool Mutable); 3650 3651 /// \brief Note that we have finished the explicit captures for the 3652 /// given lambda. 3653 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3654 3655 /// \brief Introduce the lambda parameters into scope. 3656 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3657 3658 /// ActOnStartOfLambdaDefinition - This is called just before we start 3659 /// parsing the body of a lambda; it analyzes the explicit captures and 3660 /// arguments, and sets up various data-structures for the body of the 3661 /// lambda. 3662 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3663 Declarator &ParamInfo, Scope *CurScope); 3664 3665 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3666 /// is invoked to pop the information about the lambda. 3667 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3668 bool IsInstantiation = false); 3669 3670 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3671 /// was successfully completed. 3672 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3673 Scope *CurScope, 3674 llvm::Optional<unsigned> ManglingNumber 3675 = llvm::Optional<unsigned>(), 3676 Decl *ContextDecl = 0, 3677 bool IsInstantiation = false); 3678 3679 /// \brief Define the "body" of the conversion from a lambda object to a 3680 /// function pointer. 3681 /// 3682 /// This routine doesn't actually define a sensible body; rather, it fills 3683 /// in the initialization expression needed to copy the lambda object into 3684 /// the block, and IR generation actually generates the real body of the 3685 /// block pointer conversion. 3686 void DefineImplicitLambdaToFunctionPointerConversion( 3687 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3688 3689 /// \brief Define the "body" of the conversion from a lambda object to a 3690 /// block pointer. 3691 /// 3692 /// This routine doesn't actually define a sensible body; rather, it fills 3693 /// in the initialization expression needed to copy the lambda object into 3694 /// the block, and IR generation actually generates the real body of the 3695 /// block pointer conversion. 3696 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3697 CXXConversionDecl *Conv); 3698 3699 ExprResult BuildBlockForLambdaConversion(SourceLocation CurrentLocation, 3700 SourceLocation ConvLocation, 3701 CXXConversionDecl *Conv, 3702 Expr *Src); 3703 3704 // ParseObjCStringLiteral - Parse Objective-C string literals. 3705 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3706 Expr **Strings, 3707 unsigned NumStrings); 3708 3709 ExprResult BuildObjCStringLiteral(SourceLocation AtLoc, StringLiteral *S); 3710 3711 /// BuildObjCNumericLiteral - builds an ObjCNumericLiteral AST node for the 3712 /// numeric literal expression. Type of the expression will be "NSNumber *" 3713 /// or "id" if NSNumber is unavailable. 3714 ExprResult BuildObjCNumericLiteral(SourceLocation AtLoc, Expr *Number); 3715 ExprResult ActOnObjCBoolLiteral(SourceLocation AtLoc, SourceLocation ValueLoc, 3716 bool Value); 3717 ExprResult BuildObjCArrayLiteral(SourceRange SR, MultiExprArg Elements); 3718 3719 ExprResult BuildObjCSubscriptExpression(SourceLocation RB, Expr *BaseExpr, 3720 Expr *IndexExpr, 3721 ObjCMethodDecl *getterMethod, 3722 ObjCMethodDecl *setterMethod); 3723 3724 ExprResult BuildObjCDictionaryLiteral(SourceRange SR, 3725 ObjCDictionaryElement *Elements, 3726 unsigned NumElements); 3727 3728 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3729 TypeSourceInfo *EncodedTypeInfo, 3730 SourceLocation RParenLoc); 3731 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3732 CXXConversionDecl *Method, 3733 bool HadMultipleCandidates); 3734 3735 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3736 SourceLocation EncodeLoc, 3737 SourceLocation LParenLoc, 3738 ParsedType Ty, 3739 SourceLocation RParenLoc); 3740 3741 // ParseObjCSelectorExpression - Build selector expression for @selector 3742 ExprResult ParseObjCSelectorExpression(Selector Sel, 3743 SourceLocation AtLoc, 3744 SourceLocation SelLoc, 3745 SourceLocation LParenLoc, 3746 SourceLocation RParenLoc); 3747 3748 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3749 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3750 SourceLocation AtLoc, 3751 SourceLocation ProtoLoc, 3752 SourceLocation LParenLoc, 3753 SourceLocation RParenLoc); 3754 3755 //===--------------------------------------------------------------------===// 3756 // C++ Declarations 3757 // 3758 Decl *ActOnStartLinkageSpecification(Scope *S, 3759 SourceLocation ExternLoc, 3760 SourceLocation LangLoc, 3761 StringRef Lang, 3762 SourceLocation LBraceLoc); 3763 Decl *ActOnFinishLinkageSpecification(Scope *S, 3764 Decl *LinkageSpec, 3765 SourceLocation RBraceLoc); 3766 3767 3768 //===--------------------------------------------------------------------===// 3769 // C++ Classes 3770 // 3771 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3772 const CXXScopeSpec *SS = 0); 3773 3774 bool ActOnAccessSpecifier(AccessSpecifier Access, 3775 SourceLocation ASLoc, 3776 SourceLocation ColonLoc, 3777 AttributeList *Attrs = 0); 3778 3779 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3780 Declarator &D, 3781 MultiTemplateParamsArg TemplateParameterLists, 3782 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3783 bool HasDeferredInit); 3784 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3785 Expr *Init); 3786 3787 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3788 Scope *S, 3789 CXXScopeSpec &SS, 3790 IdentifierInfo *MemberOrBase, 3791 ParsedType TemplateTypeTy, 3792 const DeclSpec &DS, 3793 SourceLocation IdLoc, 3794 SourceLocation LParenLoc, 3795 Expr **Args, unsigned NumArgs, 3796 SourceLocation RParenLoc, 3797 SourceLocation EllipsisLoc); 3798 3799 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3800 Scope *S, 3801 CXXScopeSpec &SS, 3802 IdentifierInfo *MemberOrBase, 3803 ParsedType TemplateTypeTy, 3804 const DeclSpec &DS, 3805 SourceLocation IdLoc, 3806 Expr *InitList, 3807 SourceLocation EllipsisLoc); 3808 3809 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3810 Scope *S, 3811 CXXScopeSpec &SS, 3812 IdentifierInfo *MemberOrBase, 3813 ParsedType TemplateTypeTy, 3814 const DeclSpec &DS, 3815 SourceLocation IdLoc, 3816 Expr *Init, 3817 SourceLocation EllipsisLoc); 3818 3819 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3820 Expr *Init, 3821 SourceLocation IdLoc); 3822 3823 MemInitResult BuildBaseInitializer(QualType BaseType, 3824 TypeSourceInfo *BaseTInfo, 3825 Expr *Init, 3826 CXXRecordDecl *ClassDecl, 3827 SourceLocation EllipsisLoc); 3828 3829 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3830 Expr *Init, 3831 CXXRecordDecl *ClassDecl); 3832 3833 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3834 CXXCtorInitializer *Initializer); 3835 3836 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3837 CXXCtorInitializer **Initializers, 3838 unsigned NumInitializers, bool AnyErrors); 3839 3840 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3841 3842 3843 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3844 /// mark all the non-trivial destructors of its members and bases as 3845 /// referenced. 3846 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3847 CXXRecordDecl *Record); 3848 3849 /// \brief The list of classes whose vtables have been used within 3850 /// this translation unit, and the source locations at which the 3851 /// first use occurred. 3852 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3853 3854 /// \brief The list of vtables that are required but have not yet been 3855 /// materialized. 3856 SmallVector<VTableUse, 16> VTableUses; 3857 3858 /// \brief The set of classes whose vtables have been used within 3859 /// this translation unit, and a bit that will be true if the vtable is 3860 /// required to be emitted (otherwise, it should be emitted only if needed 3861 /// by code generation). 3862 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3863 3864 /// \brief Load any externally-stored vtable uses. 3865 void LoadExternalVTableUses(); 3866 3867 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3868 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3869 DynamicClassesType; 3870 3871 /// \brief A list of all of the dynamic classes in this translation 3872 /// unit. 3873 DynamicClassesType DynamicClasses; 3874 3875 /// \brief Note that the vtable for the given class was used at the 3876 /// given location. 3877 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3878 bool DefinitionRequired = false); 3879 3880 /// MarkVirtualMembersReferenced - Will mark all members of the given 3881 /// CXXRecordDecl referenced. 3882 void MarkVirtualMembersReferenced(SourceLocation Loc, 3883 const CXXRecordDecl *RD); 3884 3885 /// \brief Define all of the vtables that have been used in this 3886 /// translation unit and reference any virtual members used by those 3887 /// vtables. 3888 /// 3889 /// \returns true if any work was done, false otherwise. 3890 bool DefineUsedVTables(); 3891 3892 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3893 3894 void ActOnMemInitializers(Decl *ConstructorDecl, 3895 SourceLocation ColonLoc, 3896 CXXCtorInitializer **MemInits, 3897 unsigned NumMemInits, 3898 bool AnyErrors); 3899 3900 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3901 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3902 Decl *TagDecl, 3903 SourceLocation LBrac, 3904 SourceLocation RBrac, 3905 AttributeList *AttrList); 3906 3907 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3908 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3909 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3910 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3911 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3912 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3913 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3914 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3915 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3916 bool IsInsideALocalClassWithinATemplateFunction(); 3917 3918 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3919 Expr *AssertExpr, 3920 Expr *AssertMessageExpr, 3921 SourceLocation RParenLoc); 3922 3923 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3924 SourceLocation FriendLoc, 3925 TypeSourceInfo *TSInfo); 3926 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3927 MultiTemplateParamsArg TemplateParams); 3928 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3929 MultiTemplateParamsArg TemplateParams); 3930 3931 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3932 StorageClass& SC); 3933 void CheckConstructor(CXXConstructorDecl *Constructor); 3934 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3935 StorageClass& SC); 3936 bool CheckDestructor(CXXDestructorDecl *Destructor); 3937 void CheckConversionDeclarator(Declarator &D, QualType &R, 3938 StorageClass& SC); 3939 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3940 3941 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3942 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3943 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3944 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3945 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3946 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3947 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3948 3949 //===--------------------------------------------------------------------===// 3950 // C++ Derived Classes 3951 // 3952 3953 /// ActOnBaseSpecifier - Parsed a base specifier 3954 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3955 SourceRange SpecifierRange, 3956 bool Virtual, AccessSpecifier Access, 3957 TypeSourceInfo *TInfo, 3958 SourceLocation EllipsisLoc); 3959 3960 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3961 SourceRange SpecifierRange, 3962 bool Virtual, AccessSpecifier Access, 3963 ParsedType basetype, 3964 SourceLocation BaseLoc, 3965 SourceLocation EllipsisLoc); 3966 3967 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3968 unsigned NumBases); 3969 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3970 unsigned NumBases); 3971 3972 bool IsDerivedFrom(QualType Derived, QualType Base); 3973 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3974 3975 // FIXME: I don't like this name. 3976 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3977 3978 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3979 3980 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3981 SourceLocation Loc, SourceRange Range, 3982 CXXCastPath *BasePath = 0, 3983 bool IgnoreAccess = false); 3984 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3985 unsigned InaccessibleBaseID, 3986 unsigned AmbigiousBaseConvID, 3987 SourceLocation Loc, SourceRange Range, 3988 DeclarationName Name, 3989 CXXCastPath *BasePath); 3990 3991 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3992 3993 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3994 /// covariant, according to C++ [class.virtual]p5. 3995 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3996 const CXXMethodDecl *Old); 3997 3998 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3999 /// spec is a subset of base spec. 4000 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 4001 const CXXMethodDecl *Old); 4002 4003 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 4004 4005 /// CheckOverrideControl - Check C++0x override control semantics. 4006 void CheckOverrideControl(const Decl *D); 4007 4008 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 4009 /// overrides a virtual member function marked 'final', according to 4010 /// C++0x [class.virtual]p3. 4011 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 4012 const CXXMethodDecl *Old); 4013 4014 4015 //===--------------------------------------------------------------------===// 4016 // C++ Access Control 4017 // 4018 4019 enum AccessResult { 4020 AR_accessible, 4021 AR_inaccessible, 4022 AR_dependent, 4023 AR_delayed 4024 }; 4025 4026 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 4027 NamedDecl *PrevMemberDecl, 4028 AccessSpecifier LexicalAS); 4029 4030 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 4031 DeclAccessPair FoundDecl); 4032 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 4033 DeclAccessPair FoundDecl); 4034 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 4035 SourceRange PlacementRange, 4036 CXXRecordDecl *NamingClass, 4037 DeclAccessPair FoundDecl, 4038 bool Diagnose = true); 4039 AccessResult CheckConstructorAccess(SourceLocation Loc, 4040 CXXConstructorDecl *D, 4041 const InitializedEntity &Entity, 4042 AccessSpecifier Access, 4043 bool IsCopyBindingRefToTemp = false); 4044 AccessResult CheckConstructorAccess(SourceLocation Loc, 4045 CXXConstructorDecl *D, 4046 AccessSpecifier Access, 4047 PartialDiagnostic PD); 4048 AccessResult CheckDestructorAccess(SourceLocation Loc, 4049 CXXDestructorDecl *Dtor, 4050 const PartialDiagnostic &PDiag); 4051 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 4052 NamedDecl *D, 4053 const PartialDiagnostic &PDiag); 4054 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 4055 Expr *ObjectExpr, 4056 Expr *ArgExpr, 4057 DeclAccessPair FoundDecl); 4058 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 4059 DeclAccessPair FoundDecl); 4060 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 4061 QualType Base, QualType Derived, 4062 const CXXBasePath &Path, 4063 unsigned DiagID, 4064 bool ForceCheck = false, 4065 bool ForceUnprivileged = false); 4066 void CheckLookupAccess(const LookupResult &R); 4067 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 4068 4069 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 4070 const MultiLevelTemplateArgumentList &TemplateArgs); 4071 void PerformDependentDiagnostics(const DeclContext *Pattern, 4072 const MultiLevelTemplateArgumentList &TemplateArgs); 4073 4074 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4075 4076 /// A flag to suppress access checking. 4077 bool SuppressAccessChecking; 4078 4079 /// \brief When true, access checking violations are treated as SFINAE 4080 /// failures rather than hard errors. 4081 bool AccessCheckingSFINAE; 4082 4083 void ActOnStartSuppressingAccessChecks(); 4084 void ActOnStopSuppressingAccessChecks(); 4085 4086 enum AbstractDiagSelID { 4087 AbstractNone = -1, 4088 AbstractReturnType, 4089 AbstractParamType, 4090 AbstractVariableType, 4091 AbstractFieldType, 4092 AbstractArrayType 4093 }; 4094 4095 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4096 const PartialDiagnostic &PD); 4097 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4098 4099 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4100 AbstractDiagSelID SelID = AbstractNone); 4101 4102 //===--------------------------------------------------------------------===// 4103 // C++ Overloaded Operators [C++ 13.5] 4104 // 4105 4106 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4107 4108 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4109 4110 //===--------------------------------------------------------------------===// 4111 // C++ Templates [C++ 14] 4112 // 4113 void FilterAcceptableTemplateNames(LookupResult &R); 4114 bool hasAnyAcceptableTemplateNames(LookupResult &R); 4115 4116 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4117 QualType ObjectType, bool EnteringContext, 4118 bool &MemberOfUnknownSpecialization); 4119 4120 TemplateNameKind isTemplateName(Scope *S, 4121 CXXScopeSpec &SS, 4122 bool hasTemplateKeyword, 4123 UnqualifiedId &Name, 4124 ParsedType ObjectType, 4125 bool EnteringContext, 4126 TemplateTy &Template, 4127 bool &MemberOfUnknownSpecialization); 4128 4129 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4130 SourceLocation IILoc, 4131 Scope *S, 4132 const CXXScopeSpec *SS, 4133 TemplateTy &SuggestedTemplate, 4134 TemplateNameKind &SuggestedKind); 4135 4136 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4137 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4138 4139 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4140 SourceLocation EllipsisLoc, 4141 SourceLocation KeyLoc, 4142 IdentifierInfo *ParamName, 4143 SourceLocation ParamNameLoc, 4144 unsigned Depth, unsigned Position, 4145 SourceLocation EqualLoc, 4146 ParsedType DefaultArg); 4147 4148 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4149 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4150 unsigned Depth, 4151 unsigned Position, 4152 SourceLocation EqualLoc, 4153 Expr *DefaultArg); 4154 Decl *ActOnTemplateTemplateParameter(Scope *S, 4155 SourceLocation TmpLoc, 4156 TemplateParameterList *Params, 4157 SourceLocation EllipsisLoc, 4158 IdentifierInfo *ParamName, 4159 SourceLocation ParamNameLoc, 4160 unsigned Depth, 4161 unsigned Position, 4162 SourceLocation EqualLoc, 4163 ParsedTemplateArgument DefaultArg); 4164 4165 TemplateParameterList * 4166 ActOnTemplateParameterList(unsigned Depth, 4167 SourceLocation ExportLoc, 4168 SourceLocation TemplateLoc, 4169 SourceLocation LAngleLoc, 4170 Decl **Params, unsigned NumParams, 4171 SourceLocation RAngleLoc); 4172 4173 /// \brief The context in which we are checking a template parameter 4174 /// list. 4175 enum TemplateParamListContext { 4176 TPC_ClassTemplate, 4177 TPC_FunctionTemplate, 4178 TPC_ClassTemplateMember, 4179 TPC_FriendFunctionTemplate, 4180 TPC_FriendFunctionTemplateDefinition, 4181 TPC_TypeAliasTemplate 4182 }; 4183 4184 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4185 TemplateParameterList *OldParams, 4186 TemplateParamListContext TPC); 4187 TemplateParameterList * 4188 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4189 SourceLocation DeclLoc, 4190 const CXXScopeSpec &SS, 4191 TemplateParameterList **ParamLists, 4192 unsigned NumParamLists, 4193 bool IsFriend, 4194 bool &IsExplicitSpecialization, 4195 bool &Invalid); 4196 4197 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4198 SourceLocation KWLoc, CXXScopeSpec &SS, 4199 IdentifierInfo *Name, SourceLocation NameLoc, 4200 AttributeList *Attr, 4201 TemplateParameterList *TemplateParams, 4202 AccessSpecifier AS, 4203 SourceLocation ModulePrivateLoc, 4204 unsigned NumOuterTemplateParamLists, 4205 TemplateParameterList **OuterTemplateParamLists); 4206 4207 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4208 TemplateArgumentListInfo &Out); 4209 4210 void NoteAllFoundTemplates(TemplateName Name); 4211 4212 QualType CheckTemplateIdType(TemplateName Template, 4213 SourceLocation TemplateLoc, 4214 TemplateArgumentListInfo &TemplateArgs); 4215 4216 TypeResult 4217 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4218 TemplateTy Template, SourceLocation TemplateLoc, 4219 SourceLocation LAngleLoc, 4220 ASTTemplateArgsPtr TemplateArgs, 4221 SourceLocation RAngleLoc, 4222 bool IsCtorOrDtorName = false); 4223 4224 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4225 /// such as \c class T::template apply<U>. 4226 /// 4227 /// \param TUK 4228 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4229 TypeSpecifierType TagSpec, 4230 SourceLocation TagLoc, 4231 CXXScopeSpec &SS, 4232 SourceLocation TemplateKWLoc, 4233 TemplateTy TemplateD, 4234 SourceLocation TemplateLoc, 4235 SourceLocation LAngleLoc, 4236 ASTTemplateArgsPtr TemplateArgsIn, 4237 SourceLocation RAngleLoc); 4238 4239 4240 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4241 SourceLocation TemplateKWLoc, 4242 LookupResult &R, 4243 bool RequiresADL, 4244 const TemplateArgumentListInfo *TemplateArgs); 4245 4246 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4247 SourceLocation TemplateKWLoc, 4248 const DeclarationNameInfo &NameInfo, 4249 const TemplateArgumentListInfo *TemplateArgs); 4250 4251 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4252 CXXScopeSpec &SS, 4253 SourceLocation TemplateKWLoc, 4254 UnqualifiedId &Name, 4255 ParsedType ObjectType, 4256 bool EnteringContext, 4257 TemplateTy &Template); 4258 4259 DeclResult 4260 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4261 SourceLocation KWLoc, 4262 SourceLocation ModulePrivateLoc, 4263 CXXScopeSpec &SS, 4264 TemplateTy Template, 4265 SourceLocation TemplateNameLoc, 4266 SourceLocation LAngleLoc, 4267 ASTTemplateArgsPtr TemplateArgs, 4268 SourceLocation RAngleLoc, 4269 AttributeList *Attr, 4270 MultiTemplateParamsArg TemplateParameterLists); 4271 4272 Decl *ActOnTemplateDeclarator(Scope *S, 4273 MultiTemplateParamsArg TemplateParameterLists, 4274 Declarator &D); 4275 4276 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4277 MultiTemplateParamsArg TemplateParameterLists, 4278 Declarator &D); 4279 4280 bool 4281 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4282 TemplateSpecializationKind NewTSK, 4283 NamedDecl *PrevDecl, 4284 TemplateSpecializationKind PrevTSK, 4285 SourceLocation PrevPtOfInstantiation, 4286 bool &SuppressNew); 4287 4288 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4289 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4290 LookupResult &Previous); 4291 4292 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4293 TemplateArgumentListInfo *ExplicitTemplateArgs, 4294 LookupResult &Previous); 4295 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4296 4297 DeclResult 4298 ActOnExplicitInstantiation(Scope *S, 4299 SourceLocation ExternLoc, 4300 SourceLocation TemplateLoc, 4301 unsigned TagSpec, 4302 SourceLocation KWLoc, 4303 const CXXScopeSpec &SS, 4304 TemplateTy Template, 4305 SourceLocation TemplateNameLoc, 4306 SourceLocation LAngleLoc, 4307 ASTTemplateArgsPtr TemplateArgs, 4308 SourceLocation RAngleLoc, 4309 AttributeList *Attr); 4310 4311 DeclResult 4312 ActOnExplicitInstantiation(Scope *S, 4313 SourceLocation ExternLoc, 4314 SourceLocation TemplateLoc, 4315 unsigned TagSpec, 4316 SourceLocation KWLoc, 4317 CXXScopeSpec &SS, 4318 IdentifierInfo *Name, 4319 SourceLocation NameLoc, 4320 AttributeList *Attr); 4321 4322 DeclResult ActOnExplicitInstantiation(Scope *S, 4323 SourceLocation ExternLoc, 4324 SourceLocation TemplateLoc, 4325 Declarator &D); 4326 4327 TemplateArgumentLoc 4328 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4329 SourceLocation TemplateLoc, 4330 SourceLocation RAngleLoc, 4331 Decl *Param, 4332 SmallVectorImpl<TemplateArgument> &Converted); 4333 4334 /// \brief Specifies the context in which a particular template 4335 /// argument is being checked. 4336 enum CheckTemplateArgumentKind { 4337 /// \brief The template argument was specified in the code or was 4338 /// instantiated with some deduced template arguments. 4339 CTAK_Specified, 4340 4341 /// \brief The template argument was deduced via template argument 4342 /// deduction. 4343 CTAK_Deduced, 4344 4345 /// \brief The template argument was deduced from an array bound 4346 /// via template argument deduction. 4347 CTAK_DeducedFromArrayBound 4348 }; 4349 4350 bool CheckTemplateArgument(NamedDecl *Param, 4351 const TemplateArgumentLoc &Arg, 4352 NamedDecl *Template, 4353 SourceLocation TemplateLoc, 4354 SourceLocation RAngleLoc, 4355 unsigned ArgumentPackIndex, 4356 SmallVectorImpl<TemplateArgument> &Converted, 4357 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4358 4359 /// \brief Check that the given template arguments can be be provided to 4360 /// the given template, converting the arguments along the way. 4361 /// 4362 /// \param Template The template to which the template arguments are being 4363 /// provided. 4364 /// 4365 /// \param TemplateLoc The location of the template name in the source. 4366 /// 4367 /// \param TemplateArgs The list of template arguments. If the template is 4368 /// a template template parameter, this function may extend the set of 4369 /// template arguments to also include substituted, defaulted template 4370 /// arguments. 4371 /// 4372 /// \param PartialTemplateArgs True if the list of template arguments is 4373 /// intentionally partial, e.g., because we're checking just the initial 4374 /// set of template arguments. 4375 /// 4376 /// \param Converted Will receive the converted, canonicalized template 4377 /// arguments. 4378 /// 4379 /// 4380 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4381 /// when the template arguments contain a pack expansion that is being 4382 /// expanded into a fixed parameter list. 4383 /// 4384 /// \returns True if an error occurred, false otherwise. 4385 bool CheckTemplateArgumentList(TemplateDecl *Template, 4386 SourceLocation TemplateLoc, 4387 TemplateArgumentListInfo &TemplateArgs, 4388 bool PartialTemplateArgs, 4389 SmallVectorImpl<TemplateArgument> &Converted, 4390 bool *ExpansionIntoFixedList = 0); 4391 4392 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4393 const TemplateArgumentLoc &Arg, 4394 SmallVectorImpl<TemplateArgument> &Converted); 4395 4396 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4397 TypeSourceInfo *Arg); 4398 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4399 TemplateArgument &Converted); 4400 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4401 QualType InstantiatedParamType, Expr *Arg, 4402 TemplateArgument &Converted, 4403 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4404 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4405 const TemplateArgumentLoc &Arg); 4406 4407 ExprResult 4408 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4409 QualType ParamType, 4410 SourceLocation Loc); 4411 ExprResult 4412 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4413 SourceLocation Loc); 4414 4415 /// \brief Enumeration describing how template parameter lists are compared 4416 /// for equality. 4417 enum TemplateParameterListEqualKind { 4418 /// \brief We are matching the template parameter lists of two templates 4419 /// that might be redeclarations. 4420 /// 4421 /// \code 4422 /// template<typename T> struct X; 4423 /// template<typename T> struct X; 4424 /// \endcode 4425 TPL_TemplateMatch, 4426 4427 /// \brief We are matching the template parameter lists of two template 4428 /// template parameters as part of matching the template parameter lists 4429 /// of two templates that might be redeclarations. 4430 /// 4431 /// \code 4432 /// template<template<int I> class TT> struct X; 4433 /// template<template<int Value> class Other> struct X; 4434 /// \endcode 4435 TPL_TemplateTemplateParmMatch, 4436 4437 /// \brief We are matching the template parameter lists of a template 4438 /// template argument against the template parameter lists of a template 4439 /// template parameter. 4440 /// 4441 /// \code 4442 /// template<template<int Value> class Metafun> struct X; 4443 /// template<int Value> struct integer_c; 4444 /// X<integer_c> xic; 4445 /// \endcode 4446 TPL_TemplateTemplateArgumentMatch 4447 }; 4448 4449 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4450 TemplateParameterList *Old, 4451 bool Complain, 4452 TemplateParameterListEqualKind Kind, 4453 SourceLocation TemplateArgLoc 4454 = SourceLocation()); 4455 4456 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4457 4458 /// \brief Called when the parser has parsed a C++ typename 4459 /// specifier, e.g., "typename T::type". 4460 /// 4461 /// \param S The scope in which this typename type occurs. 4462 /// \param TypenameLoc the location of the 'typename' keyword 4463 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4464 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4465 /// \param IdLoc the location of the identifier. 4466 TypeResult 4467 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4468 const CXXScopeSpec &SS, const IdentifierInfo &II, 4469 SourceLocation IdLoc); 4470 4471 /// \brief Called when the parser has parsed a C++ typename 4472 /// specifier that ends in a template-id, e.g., 4473 /// "typename MetaFun::template apply<T1, T2>". 4474 /// 4475 /// \param S The scope in which this typename type occurs. 4476 /// \param TypenameLoc the location of the 'typename' keyword 4477 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4478 /// \param TemplateLoc the location of the 'template' keyword, if any. 4479 /// \param TemplateName The template name. 4480 /// \param TemplateNameLoc The location of the template name. 4481 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4482 /// \param TemplateArgs The template arguments. 4483 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4484 TypeResult 4485 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4486 const CXXScopeSpec &SS, 4487 SourceLocation TemplateLoc, 4488 TemplateTy Template, 4489 SourceLocation TemplateNameLoc, 4490 SourceLocation LAngleLoc, 4491 ASTTemplateArgsPtr TemplateArgs, 4492 SourceLocation RAngleLoc); 4493 4494 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4495 SourceLocation KeywordLoc, 4496 NestedNameSpecifierLoc QualifierLoc, 4497 const IdentifierInfo &II, 4498 SourceLocation IILoc); 4499 4500 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4501 SourceLocation Loc, 4502 DeclarationName Name); 4503 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4504 4505 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4506 bool RebuildTemplateParamsInCurrentInstantiation( 4507 TemplateParameterList *Params); 4508 4509 std::string 4510 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4511 const TemplateArgumentList &Args); 4512 4513 std::string 4514 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4515 const TemplateArgument *Args, 4516 unsigned NumArgs); 4517 4518 //===--------------------------------------------------------------------===// 4519 // C++ Variadic Templates (C++0x [temp.variadic]) 4520 //===--------------------------------------------------------------------===// 4521 4522 /// \brief The context in which an unexpanded parameter pack is 4523 /// being diagnosed. 4524 /// 4525 /// Note that the values of this enumeration line up with the first 4526 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4527 enum UnexpandedParameterPackContext { 4528 /// \brief An arbitrary expression. 4529 UPPC_Expression = 0, 4530 4531 /// \brief The base type of a class type. 4532 UPPC_BaseType, 4533 4534 /// \brief The type of an arbitrary declaration. 4535 UPPC_DeclarationType, 4536 4537 /// \brief The type of a data member. 4538 UPPC_DataMemberType, 4539 4540 /// \brief The size of a bit-field. 4541 UPPC_BitFieldWidth, 4542 4543 /// \brief The expression in a static assertion. 4544 UPPC_StaticAssertExpression, 4545 4546 /// \brief The fixed underlying type of an enumeration. 4547 UPPC_FixedUnderlyingType, 4548 4549 /// \brief The enumerator value. 4550 UPPC_EnumeratorValue, 4551 4552 /// \brief A using declaration. 4553 UPPC_UsingDeclaration, 4554 4555 /// \brief A friend declaration. 4556 UPPC_FriendDeclaration, 4557 4558 /// \brief A declaration qualifier. 4559 UPPC_DeclarationQualifier, 4560 4561 /// \brief An initializer. 4562 UPPC_Initializer, 4563 4564 /// \brief A default argument. 4565 UPPC_DefaultArgument, 4566 4567 /// \brief The type of a non-type template parameter. 4568 UPPC_NonTypeTemplateParameterType, 4569 4570 /// \brief The type of an exception. 4571 UPPC_ExceptionType, 4572 4573 /// \brief Partial specialization. 4574 UPPC_PartialSpecialization, 4575 4576 /// \brief Microsoft __if_exists. 4577 UPPC_IfExists, 4578 4579 /// \brief Microsoft __if_not_exists. 4580 UPPC_IfNotExists 4581}; 4582 4583 /// \brief Diagnose unexpanded parameter packs. 4584 /// 4585 /// \param Loc The location at which we should emit the diagnostic. 4586 /// 4587 /// \param UPPC The context in which we are diagnosing unexpanded 4588 /// parameter packs. 4589 /// 4590 /// \param Unexpanded the set of unexpanded parameter packs. 4591 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4592 UnexpandedParameterPackContext UPPC, 4593 ArrayRef<UnexpandedParameterPack> Unexpanded); 4594 4595 /// \brief If the given type contains an unexpanded parameter pack, 4596 /// diagnose the error. 4597 /// 4598 /// \param Loc The source location where a diagnostc should be emitted. 4599 /// 4600 /// \param T The type that is being checked for unexpanded parameter 4601 /// packs. 4602 /// 4603 /// \returns true if an error occurred, false otherwise. 4604 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4605 UnexpandedParameterPackContext UPPC); 4606 4607 /// \brief If the given expression contains an unexpanded parameter 4608 /// pack, diagnose the error. 4609 /// 4610 /// \param E The expression that is being checked for unexpanded 4611 /// parameter packs. 4612 /// 4613 /// \returns true if an error occurred, false otherwise. 4614 bool DiagnoseUnexpandedParameterPack(Expr *E, 4615 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4616 4617 /// \brief If the given nested-name-specifier contains an unexpanded 4618 /// parameter pack, diagnose the error. 4619 /// 4620 /// \param SS The nested-name-specifier that is being checked for 4621 /// unexpanded parameter packs. 4622 /// 4623 /// \returns true if an error occurred, false otherwise. 4624 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4625 UnexpandedParameterPackContext UPPC); 4626 4627 /// \brief If the given name contains an unexpanded parameter pack, 4628 /// diagnose the error. 4629 /// 4630 /// \param NameInfo The name (with source location information) that 4631 /// is being checked for unexpanded parameter packs. 4632 /// 4633 /// \returns true if an error occurred, false otherwise. 4634 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4635 UnexpandedParameterPackContext UPPC); 4636 4637 /// \brief If the given template name contains an unexpanded parameter pack, 4638 /// diagnose the error. 4639 /// 4640 /// \param Loc The location of the template name. 4641 /// 4642 /// \param Template The template name that is being checked for unexpanded 4643 /// parameter packs. 4644 /// 4645 /// \returns true if an error occurred, false otherwise. 4646 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4647 TemplateName Template, 4648 UnexpandedParameterPackContext UPPC); 4649 4650 /// \brief If the given template argument contains an unexpanded parameter 4651 /// pack, diagnose the error. 4652 /// 4653 /// \param Arg The template argument that is being checked for unexpanded 4654 /// parameter packs. 4655 /// 4656 /// \returns true if an error occurred, false otherwise. 4657 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4658 UnexpandedParameterPackContext UPPC); 4659 4660 /// \brief Collect the set of unexpanded parameter packs within the given 4661 /// template argument. 4662 /// 4663 /// \param Arg The template argument that will be traversed to find 4664 /// unexpanded parameter packs. 4665 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4666 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4667 4668 /// \brief Collect the set of unexpanded parameter packs within the given 4669 /// template argument. 4670 /// 4671 /// \param Arg The template argument that will be traversed to find 4672 /// unexpanded parameter packs. 4673 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4674 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4675 4676 /// \brief Collect the set of unexpanded parameter packs within the given 4677 /// type. 4678 /// 4679 /// \param T The type that will be traversed to find 4680 /// unexpanded parameter packs. 4681 void collectUnexpandedParameterPacks(QualType T, 4682 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4683 4684 /// \brief Collect the set of unexpanded parameter packs within the given 4685 /// type. 4686 /// 4687 /// \param TL The type that will be traversed to find 4688 /// unexpanded parameter packs. 4689 void collectUnexpandedParameterPacks(TypeLoc TL, 4690 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4691 4692 /// \brief Collect the set of unexpanded parameter packs within the given 4693 /// nested-name-specifier. 4694 /// 4695 /// \param SS The nested-name-specifier that will be traversed to find 4696 /// unexpanded parameter packs. 4697 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4698 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4699 4700 /// \brief Collect the set of unexpanded parameter packs within the given 4701 /// name. 4702 /// 4703 /// \param NameInfo The name that will be traversed to find 4704 /// unexpanded parameter packs. 4705 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4706 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4707 4708 /// \brief Invoked when parsing a template argument followed by an 4709 /// ellipsis, which creates a pack expansion. 4710 /// 4711 /// \param Arg The template argument preceding the ellipsis, which 4712 /// may already be invalid. 4713 /// 4714 /// \param EllipsisLoc The location of the ellipsis. 4715 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4716 SourceLocation EllipsisLoc); 4717 4718 /// \brief Invoked when parsing a type followed by an ellipsis, which 4719 /// creates a pack expansion. 4720 /// 4721 /// \param Type The type preceding the ellipsis, which will become 4722 /// the pattern of the pack expansion. 4723 /// 4724 /// \param EllipsisLoc The location of the ellipsis. 4725 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4726 4727 /// \brief Construct a pack expansion type from the pattern of the pack 4728 /// expansion. 4729 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4730 SourceLocation EllipsisLoc, 4731 llvm::Optional<unsigned> NumExpansions); 4732 4733 /// \brief Construct a pack expansion type from the pattern of the pack 4734 /// expansion. 4735 QualType CheckPackExpansion(QualType Pattern, 4736 SourceRange PatternRange, 4737 SourceLocation EllipsisLoc, 4738 llvm::Optional<unsigned> NumExpansions); 4739 4740 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4741 /// creates a pack expansion. 4742 /// 4743 /// \param Pattern The expression preceding the ellipsis, which will become 4744 /// the pattern of the pack expansion. 4745 /// 4746 /// \param EllipsisLoc The location of the ellipsis. 4747 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4748 4749 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4750 /// creates a pack expansion. 4751 /// 4752 /// \param Pattern The expression preceding the ellipsis, which will become 4753 /// the pattern of the pack expansion. 4754 /// 4755 /// \param EllipsisLoc The location of the ellipsis. 4756 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4757 llvm::Optional<unsigned> NumExpansions); 4758 4759 /// \brief Determine whether we could expand a pack expansion with the 4760 /// given set of parameter packs into separate arguments by repeatedly 4761 /// transforming the pattern. 4762 /// 4763 /// \param EllipsisLoc The location of the ellipsis that identifies the 4764 /// pack expansion. 4765 /// 4766 /// \param PatternRange The source range that covers the entire pattern of 4767 /// the pack expansion. 4768 /// 4769 /// \param Unexpanded The set of unexpanded parameter packs within the 4770 /// pattern. 4771 /// 4772 /// \param NumUnexpanded The number of unexpanded parameter packs in 4773 /// \p Unexpanded. 4774 /// 4775 /// \param ShouldExpand Will be set to \c true if the transformer should 4776 /// expand the corresponding pack expansions into separate arguments. When 4777 /// set, \c NumExpansions must also be set. 4778 /// 4779 /// \param RetainExpansion Whether the caller should add an unexpanded 4780 /// pack expansion after all of the expanded arguments. This is used 4781 /// when extending explicitly-specified template argument packs per 4782 /// C++0x [temp.arg.explicit]p9. 4783 /// 4784 /// \param NumExpansions The number of separate arguments that will be in 4785 /// the expanded form of the corresponding pack expansion. This is both an 4786 /// input and an output parameter, which can be set by the caller if the 4787 /// number of expansions is known a priori (e.g., due to a prior substitution) 4788 /// and will be set by the callee when the number of expansions is known. 4789 /// The callee must set this value when \c ShouldExpand is \c true; it may 4790 /// set this value in other cases. 4791 /// 4792 /// \returns true if an error occurred (e.g., because the parameter packs 4793 /// are to be instantiated with arguments of different lengths), false 4794 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4795 /// must be set. 4796 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4797 SourceRange PatternRange, 4798 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4799 const MultiLevelTemplateArgumentList &TemplateArgs, 4800 bool &ShouldExpand, 4801 bool &RetainExpansion, 4802 llvm::Optional<unsigned> &NumExpansions); 4803 4804 /// \brief Determine the number of arguments in the given pack expansion 4805 /// type. 4806 /// 4807 /// This routine already assumes that the pack expansion type can be 4808 /// expanded and that the number of arguments in the expansion is 4809 /// consistent across all of the unexpanded parameter packs in its pattern. 4810 unsigned getNumArgumentsInExpansion(QualType T, 4811 const MultiLevelTemplateArgumentList &TemplateArgs); 4812 4813 /// \brief Determine whether the given declarator contains any unexpanded 4814 /// parameter packs. 4815 /// 4816 /// This routine is used by the parser to disambiguate function declarators 4817 /// with an ellipsis prior to the ')', e.g., 4818 /// 4819 /// \code 4820 /// void f(T...); 4821 /// \endcode 4822 /// 4823 /// To determine whether we have an (unnamed) function parameter pack or 4824 /// a variadic function. 4825 /// 4826 /// \returns true if the declarator contains any unexpanded parameter packs, 4827 /// false otherwise. 4828 bool containsUnexpandedParameterPacks(Declarator &D); 4829 4830 //===--------------------------------------------------------------------===// 4831 // C++ Template Argument Deduction (C++ [temp.deduct]) 4832 //===--------------------------------------------------------------------===// 4833 4834 /// \brief Describes the result of template argument deduction. 4835 /// 4836 /// The TemplateDeductionResult enumeration describes the result of 4837 /// template argument deduction, as returned from 4838 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4839 /// structure provides additional information about the results of 4840 /// template argument deduction, e.g., the deduced template argument 4841 /// list (if successful) or the specific template parameters or 4842 /// deduced arguments that were involved in the failure. 4843 enum TemplateDeductionResult { 4844 /// \brief Template argument deduction was successful. 4845 TDK_Success = 0, 4846 /// \brief Template argument deduction exceeded the maximum template 4847 /// instantiation depth (which has already been diagnosed). 4848 TDK_InstantiationDepth, 4849 /// \brief Template argument deduction did not deduce a value 4850 /// for every template parameter. 4851 TDK_Incomplete, 4852 /// \brief Template argument deduction produced inconsistent 4853 /// deduced values for the given template parameter. 4854 TDK_Inconsistent, 4855 /// \brief Template argument deduction failed due to inconsistent 4856 /// cv-qualifiers on a template parameter type that would 4857 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4858 /// but were given a non-const "X". 4859 TDK_Underqualified, 4860 /// \brief Substitution of the deduced template argument values 4861 /// resulted in an error. 4862 TDK_SubstitutionFailure, 4863 /// \brief Substitution of the deduced template argument values 4864 /// into a non-deduced context produced a type or value that 4865 /// produces a type that does not match the original template 4866 /// arguments provided. 4867 TDK_NonDeducedMismatch, 4868 /// \brief When performing template argument deduction for a function 4869 /// template, there were too many call arguments. 4870 TDK_TooManyArguments, 4871 /// \brief When performing template argument deduction for a function 4872 /// template, there were too few call arguments. 4873 TDK_TooFewArguments, 4874 /// \brief The explicitly-specified template arguments were not valid 4875 /// template arguments for the given template. 4876 TDK_InvalidExplicitArguments, 4877 /// \brief The arguments included an overloaded function name that could 4878 /// not be resolved to a suitable function. 4879 TDK_FailedOverloadResolution 4880 }; 4881 4882 TemplateDeductionResult 4883 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4884 const TemplateArgumentList &TemplateArgs, 4885 sema::TemplateDeductionInfo &Info); 4886 4887 TemplateDeductionResult 4888 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4889 TemplateArgumentListInfo &ExplicitTemplateArgs, 4890 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4891 SmallVectorImpl<QualType> &ParamTypes, 4892 QualType *FunctionType, 4893 sema::TemplateDeductionInfo &Info); 4894 4895 /// brief A function argument from which we performed template argument 4896 // deduction for a call. 4897 struct OriginalCallArg { 4898 OriginalCallArg(QualType OriginalParamType, 4899 unsigned ArgIdx, 4900 QualType OriginalArgType) 4901 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4902 OriginalArgType(OriginalArgType) { } 4903 4904 QualType OriginalParamType; 4905 unsigned ArgIdx; 4906 QualType OriginalArgType; 4907 }; 4908 4909 TemplateDeductionResult 4910 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4911 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4912 unsigned NumExplicitlySpecified, 4913 FunctionDecl *&Specialization, 4914 sema::TemplateDeductionInfo &Info, 4915 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4916 4917 TemplateDeductionResult 4918 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4919 TemplateArgumentListInfo *ExplicitTemplateArgs, 4920 llvm::ArrayRef<Expr *> Args, 4921 FunctionDecl *&Specialization, 4922 sema::TemplateDeductionInfo &Info); 4923 4924 TemplateDeductionResult 4925 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4926 TemplateArgumentListInfo *ExplicitTemplateArgs, 4927 QualType ArgFunctionType, 4928 FunctionDecl *&Specialization, 4929 sema::TemplateDeductionInfo &Info); 4930 4931 TemplateDeductionResult 4932 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4933 QualType ToType, 4934 CXXConversionDecl *&Specialization, 4935 sema::TemplateDeductionInfo &Info); 4936 4937 TemplateDeductionResult 4938 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4939 TemplateArgumentListInfo *ExplicitTemplateArgs, 4940 FunctionDecl *&Specialization, 4941 sema::TemplateDeductionInfo &Info); 4942 4943 /// \brief Result type of DeduceAutoType. 4944 enum DeduceAutoResult { 4945 DAR_Succeeded, 4946 DAR_Failed, 4947 DAR_FailedAlreadyDiagnosed 4948 }; 4949 4950 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4951 TypeSourceInfo *&Result); 4952 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4953 4954 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4955 FunctionTemplateDecl *FT2, 4956 SourceLocation Loc, 4957 TemplatePartialOrderingContext TPOC, 4958 unsigned NumCallArguments); 4959 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4960 UnresolvedSetIterator SEnd, 4961 TemplatePartialOrderingContext TPOC, 4962 unsigned NumCallArguments, 4963 SourceLocation Loc, 4964 const PartialDiagnostic &NoneDiag, 4965 const PartialDiagnostic &AmbigDiag, 4966 const PartialDiagnostic &CandidateDiag, 4967 bool Complain = true, 4968 QualType TargetType = QualType()); 4969 4970 ClassTemplatePartialSpecializationDecl * 4971 getMoreSpecializedPartialSpecialization( 4972 ClassTemplatePartialSpecializationDecl *PS1, 4973 ClassTemplatePartialSpecializationDecl *PS2, 4974 SourceLocation Loc); 4975 4976 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4977 bool OnlyDeduced, 4978 unsigned Depth, 4979 llvm::SmallBitVector &Used); 4980 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4981 llvm::SmallBitVector &Deduced) { 4982 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4983 } 4984 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4985 FunctionTemplateDecl *FunctionTemplate, 4986 llvm::SmallBitVector &Deduced); 4987 4988 //===--------------------------------------------------------------------===// 4989 // C++ Template Instantiation 4990 // 4991 4992 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4993 const TemplateArgumentList *Innermost = 0, 4994 bool RelativeToPrimary = false, 4995 const FunctionDecl *Pattern = 0); 4996 4997 /// \brief A template instantiation that is currently in progress. 4998 struct ActiveTemplateInstantiation { 4999 /// \brief The kind of template instantiation we are performing 5000 enum InstantiationKind { 5001 /// We are instantiating a template declaration. The entity is 5002 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 5003 TemplateInstantiation, 5004 5005 /// We are instantiating a default argument for a template 5006 /// parameter. The Entity is the template, and 5007 /// TemplateArgs/NumTemplateArguments provides the template 5008 /// arguments as specified. 5009 /// FIXME: Use a TemplateArgumentList 5010 DefaultTemplateArgumentInstantiation, 5011 5012 /// We are instantiating a default argument for a function. 5013 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 5014 /// provides the template arguments as specified. 5015 DefaultFunctionArgumentInstantiation, 5016 5017 /// We are substituting explicit template arguments provided for 5018 /// a function template. The entity is a FunctionTemplateDecl. 5019 ExplicitTemplateArgumentSubstitution, 5020 5021 /// We are substituting template argument determined as part of 5022 /// template argument deduction for either a class template 5023 /// partial specialization or a function template. The 5024 /// Entity is either a ClassTemplatePartialSpecializationDecl or 5025 /// a FunctionTemplateDecl. 5026 DeducedTemplateArgumentSubstitution, 5027 5028 /// We are substituting prior template arguments into a new 5029 /// template parameter. The template parameter itself is either a 5030 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 5031 PriorTemplateArgumentSubstitution, 5032 5033 /// We are checking the validity of a default template argument that 5034 /// has been used when naming a template-id. 5035 DefaultTemplateArgumentChecking 5036 } Kind; 5037 5038 /// \brief The point of instantiation within the source code. 5039 SourceLocation PointOfInstantiation; 5040 5041 /// \brief The template (or partial specialization) in which we are 5042 /// performing the instantiation, for substitutions of prior template 5043 /// arguments. 5044 NamedDecl *Template; 5045 5046 /// \brief The entity that is being instantiated. 5047 uintptr_t Entity; 5048 5049 /// \brief The list of template arguments we are substituting, if they 5050 /// are not part of the entity. 5051 const TemplateArgument *TemplateArgs; 5052 5053 /// \brief The number of template arguments in TemplateArgs. 5054 unsigned NumTemplateArgs; 5055 5056 /// \brief The template deduction info object associated with the 5057 /// substitution or checking of explicit or deduced template arguments. 5058 sema::TemplateDeductionInfo *DeductionInfo; 5059 5060 /// \brief The source range that covers the construct that cause 5061 /// the instantiation, e.g., the template-id that causes a class 5062 /// template instantiation. 5063 SourceRange InstantiationRange; 5064 5065 ActiveTemplateInstantiation() 5066 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 5067 NumTemplateArgs(0), DeductionInfo(0) {} 5068 5069 /// \brief Determines whether this template is an actual instantiation 5070 /// that should be counted toward the maximum instantiation depth. 5071 bool isInstantiationRecord() const; 5072 5073 friend bool operator==(const ActiveTemplateInstantiation &X, 5074 const ActiveTemplateInstantiation &Y) { 5075 if (X.Kind != Y.Kind) 5076 return false; 5077 5078 if (X.Entity != Y.Entity) 5079 return false; 5080 5081 switch (X.Kind) { 5082 case TemplateInstantiation: 5083 return true; 5084 5085 case PriorTemplateArgumentSubstitution: 5086 case DefaultTemplateArgumentChecking: 5087 if (X.Template != Y.Template) 5088 return false; 5089 5090 // Fall through 5091 5092 case DefaultTemplateArgumentInstantiation: 5093 case ExplicitTemplateArgumentSubstitution: 5094 case DeducedTemplateArgumentSubstitution: 5095 case DefaultFunctionArgumentInstantiation: 5096 return X.TemplateArgs == Y.TemplateArgs; 5097 5098 } 5099 5100 llvm_unreachable("Invalid InstantiationKind!"); 5101 } 5102 5103 friend bool operator!=(const ActiveTemplateInstantiation &X, 5104 const ActiveTemplateInstantiation &Y) { 5105 return !(X == Y); 5106 } 5107 }; 5108 5109 /// \brief List of active template instantiations. 5110 /// 5111 /// This vector is treated as a stack. As one template instantiation 5112 /// requires another template instantiation, additional 5113 /// instantiations are pushed onto the stack up to a 5114 /// user-configurable limit LangOptions::InstantiationDepth. 5115 SmallVector<ActiveTemplateInstantiation, 16> 5116 ActiveTemplateInstantiations; 5117 5118 /// \brief Whether we are in a SFINAE context that is not associated with 5119 /// template instantiation. 5120 /// 5121 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5122 /// of a template instantiation or template argument deduction. 5123 bool InNonInstantiationSFINAEContext; 5124 5125 /// \brief The number of ActiveTemplateInstantiation entries in 5126 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5127 /// therefore, should not be counted as part of the instantiation depth. 5128 unsigned NonInstantiationEntries; 5129 5130 /// \brief The last template from which a template instantiation 5131 /// error or warning was produced. 5132 /// 5133 /// This value is used to suppress printing of redundant template 5134 /// instantiation backtraces when there are multiple errors in the 5135 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5136 /// to implement it anywhere else. 5137 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5138 5139 /// \brief The current index into pack expansion arguments that will be 5140 /// used for substitution of parameter packs. 5141 /// 5142 /// The pack expansion index will be -1 to indicate that parameter packs 5143 /// should be instantiated as themselves. Otherwise, the index specifies 5144 /// which argument within the parameter pack will be used for substitution. 5145 int ArgumentPackSubstitutionIndex; 5146 5147 /// \brief RAII object used to change the argument pack substitution index 5148 /// within a \c Sema object. 5149 /// 5150 /// See \c ArgumentPackSubstitutionIndex for more information. 5151 class ArgumentPackSubstitutionIndexRAII { 5152 Sema &Self; 5153 int OldSubstitutionIndex; 5154 5155 public: 5156 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5157 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5158 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5159 } 5160 5161 ~ArgumentPackSubstitutionIndexRAII() { 5162 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5163 } 5164 }; 5165 5166 friend class ArgumentPackSubstitutionRAII; 5167 5168 /// \brief The stack of calls expression undergoing template instantiation. 5169 /// 5170 /// The top of this stack is used by a fixit instantiating unresolved 5171 /// function calls to fix the AST to match the textual change it prints. 5172 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5173 5174 /// \brief For each declaration that involved template argument deduction, the 5175 /// set of diagnostics that were suppressed during that template argument 5176 /// deduction. 5177 /// 5178 /// FIXME: Serialize this structure to the AST file. 5179 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5180 SuppressedDiagnostics; 5181 5182 /// \brief A stack object to be created when performing template 5183 /// instantiation. 5184 /// 5185 /// Construction of an object of type \c InstantiatingTemplate 5186 /// pushes the current instantiation onto the stack of active 5187 /// instantiations. If the size of this stack exceeds the maximum 5188 /// number of recursive template instantiations, construction 5189 /// produces an error and evaluates true. 5190 /// 5191 /// Destruction of this object will pop the named instantiation off 5192 /// the stack. 5193 struct InstantiatingTemplate { 5194 /// \brief Note that we are instantiating a class template, 5195 /// function template, or a member thereof. 5196 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5197 Decl *Entity, 5198 SourceRange InstantiationRange = SourceRange()); 5199 5200 /// \brief Note that we are instantiating a default argument in a 5201 /// template-id. 5202 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5203 TemplateDecl *Template, 5204 const TemplateArgument *TemplateArgs, 5205 unsigned NumTemplateArgs, 5206 SourceRange InstantiationRange = SourceRange()); 5207 5208 /// \brief Note that we are instantiating a default argument in a 5209 /// template-id. 5210 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5211 FunctionTemplateDecl *FunctionTemplate, 5212 const TemplateArgument *TemplateArgs, 5213 unsigned NumTemplateArgs, 5214 ActiveTemplateInstantiation::InstantiationKind Kind, 5215 sema::TemplateDeductionInfo &DeductionInfo, 5216 SourceRange InstantiationRange = SourceRange()); 5217 5218 /// \brief Note that we are instantiating as part of template 5219 /// argument deduction for a class template partial 5220 /// specialization. 5221 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5222 ClassTemplatePartialSpecializationDecl *PartialSpec, 5223 const TemplateArgument *TemplateArgs, 5224 unsigned NumTemplateArgs, 5225 sema::TemplateDeductionInfo &DeductionInfo, 5226 SourceRange InstantiationRange = SourceRange()); 5227 5228 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5229 ParmVarDecl *Param, 5230 const TemplateArgument *TemplateArgs, 5231 unsigned NumTemplateArgs, 5232 SourceRange InstantiationRange = SourceRange()); 5233 5234 /// \brief Note that we are substituting prior template arguments into a 5235 /// non-type or template template parameter. 5236 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5237 NamedDecl *Template, 5238 NonTypeTemplateParmDecl *Param, 5239 const TemplateArgument *TemplateArgs, 5240 unsigned NumTemplateArgs, 5241 SourceRange InstantiationRange); 5242 5243 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5244 NamedDecl *Template, 5245 TemplateTemplateParmDecl *Param, 5246 const TemplateArgument *TemplateArgs, 5247 unsigned NumTemplateArgs, 5248 SourceRange InstantiationRange); 5249 5250 /// \brief Note that we are checking the default template argument 5251 /// against the template parameter for a given template-id. 5252 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5253 TemplateDecl *Template, 5254 NamedDecl *Param, 5255 const TemplateArgument *TemplateArgs, 5256 unsigned NumTemplateArgs, 5257 SourceRange InstantiationRange); 5258 5259 5260 /// \brief Note that we have finished instantiating this template. 5261 void Clear(); 5262 5263 ~InstantiatingTemplate() { Clear(); } 5264 5265 /// \brief Determines whether we have exceeded the maximum 5266 /// recursive template instantiations. 5267 operator bool() const { return Invalid; } 5268 5269 private: 5270 Sema &SemaRef; 5271 bool Invalid; 5272 bool SavedInNonInstantiationSFINAEContext; 5273 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5274 SourceRange InstantiationRange); 5275 5276 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5277 5278 InstantiatingTemplate& 5279 operator=(const InstantiatingTemplate&); // not implemented 5280 }; 5281 5282 void PrintInstantiationStack(); 5283 5284 /// \brief Determines whether we are currently in a context where 5285 /// template argument substitution failures are not considered 5286 /// errors. 5287 /// 5288 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5289 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5290 /// template-deduction context object, which can be used to capture 5291 /// diagnostics that will be suppressed. 5292 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5293 5294 /// \brief RAII class used to determine whether SFINAE has 5295 /// trapped any errors that occur during template argument 5296 /// deduction.` 5297 class SFINAETrap { 5298 Sema &SemaRef; 5299 unsigned PrevSFINAEErrors; 5300 bool PrevInNonInstantiationSFINAEContext; 5301 bool PrevAccessCheckingSFINAE; 5302 5303 public: 5304 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5305 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5306 PrevInNonInstantiationSFINAEContext( 5307 SemaRef.InNonInstantiationSFINAEContext), 5308 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5309 { 5310 if (!SemaRef.isSFINAEContext()) 5311 SemaRef.InNonInstantiationSFINAEContext = true; 5312 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5313 } 5314 5315 ~SFINAETrap() { 5316 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5317 SemaRef.InNonInstantiationSFINAEContext 5318 = PrevInNonInstantiationSFINAEContext; 5319 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5320 } 5321 5322 /// \brief Determine whether any SFINAE errors have been trapped. 5323 bool hasErrorOccurred() const { 5324 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5325 } 5326 }; 5327 5328 /// \brief The current instantiation scope used to store local 5329 /// variables. 5330 LocalInstantiationScope *CurrentInstantiationScope; 5331 5332 /// \brief The number of typos corrected by CorrectTypo. 5333 unsigned TyposCorrected; 5334 5335 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5336 UnqualifiedTyposCorrectedMap; 5337 5338 /// \brief A cache containing the results of typo correction for unqualified 5339 /// name lookup. 5340 /// 5341 /// The string is the string that we corrected to (which may be empty, if 5342 /// there was no correction), while the boolean will be true when the 5343 /// string represents a keyword. 5344 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5345 5346 /// \brief Worker object for performing CFG-based warnings. 5347 sema::AnalysisBasedWarnings AnalysisWarnings; 5348 5349 /// \brief An entity for which implicit template instantiation is required. 5350 /// 5351 /// The source location associated with the declaration is the first place in 5352 /// the source code where the declaration was "used". It is not necessarily 5353 /// the point of instantiation (which will be either before or after the 5354 /// namespace-scope declaration that triggered this implicit instantiation), 5355 /// However, it is the location that diagnostics should generally refer to, 5356 /// because users will need to know what code triggered the instantiation. 5357 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5358 5359 /// \brief The queue of implicit template instantiations that are required 5360 /// but have not yet been performed. 5361 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5362 5363 /// \brief The queue of implicit template instantiations that are required 5364 /// and must be performed within the current local scope. 5365 /// 5366 /// This queue is only used for member functions of local classes in 5367 /// templates, which must be instantiated in the same scope as their 5368 /// enclosing function, so that they can reference function-local 5369 /// types, static variables, enumerators, etc. 5370 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5371 5372 void PerformPendingInstantiations(bool LocalOnly = false); 5373 5374 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5375 const MultiLevelTemplateArgumentList &TemplateArgs, 5376 SourceLocation Loc, DeclarationName Entity); 5377 5378 QualType SubstType(QualType T, 5379 const MultiLevelTemplateArgumentList &TemplateArgs, 5380 SourceLocation Loc, DeclarationName Entity); 5381 5382 TypeSourceInfo *SubstType(TypeLoc TL, 5383 const MultiLevelTemplateArgumentList &TemplateArgs, 5384 SourceLocation Loc, DeclarationName Entity); 5385 5386 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5387 const MultiLevelTemplateArgumentList &TemplateArgs, 5388 SourceLocation Loc, 5389 DeclarationName Entity); 5390 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5391 const MultiLevelTemplateArgumentList &TemplateArgs, 5392 int indexAdjustment, 5393 llvm::Optional<unsigned> NumExpansions, 5394 bool ExpectParameterPack); 5395 bool SubstParmTypes(SourceLocation Loc, 5396 ParmVarDecl **Params, unsigned NumParams, 5397 const MultiLevelTemplateArgumentList &TemplateArgs, 5398 SmallVectorImpl<QualType> &ParamTypes, 5399 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5400 ExprResult SubstExpr(Expr *E, 5401 const MultiLevelTemplateArgumentList &TemplateArgs); 5402 5403 /// \brief Substitute the given template arguments into a list of 5404 /// expressions, expanding pack expansions if required. 5405 /// 5406 /// \param Exprs The list of expressions to substitute into. 5407 /// 5408 /// \param NumExprs The number of expressions in \p Exprs. 5409 /// 5410 /// \param IsCall Whether this is some form of call, in which case 5411 /// default arguments will be dropped. 5412 /// 5413 /// \param TemplateArgs The set of template arguments to substitute. 5414 /// 5415 /// \param Outputs Will receive all of the substituted arguments. 5416 /// 5417 /// \returns true if an error occurred, false otherwise. 5418 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5419 const MultiLevelTemplateArgumentList &TemplateArgs, 5420 SmallVectorImpl<Expr *> &Outputs); 5421 5422 StmtResult SubstStmt(Stmt *S, 5423 const MultiLevelTemplateArgumentList &TemplateArgs); 5424 5425 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5426 const MultiLevelTemplateArgumentList &TemplateArgs); 5427 5428 ExprResult SubstInitializer(Expr *E, 5429 const MultiLevelTemplateArgumentList &TemplateArgs, 5430 bool CXXDirectInit); 5431 5432 bool 5433 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5434 CXXRecordDecl *Pattern, 5435 const MultiLevelTemplateArgumentList &TemplateArgs); 5436 5437 bool 5438 InstantiateClass(SourceLocation PointOfInstantiation, 5439 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5440 const MultiLevelTemplateArgumentList &TemplateArgs, 5441 TemplateSpecializationKind TSK, 5442 bool Complain = true); 5443 5444 struct LateInstantiatedAttribute { 5445 const Attr *TmplAttr; 5446 LocalInstantiationScope *Scope; 5447 Decl *NewDecl; 5448 5449 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5450 Decl *D) 5451 : TmplAttr(A), Scope(S), NewDecl(D) 5452 { } 5453 }; 5454 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5455 5456 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5457 const Decl *Pattern, Decl *Inst, 5458 LateInstantiatedAttrVec *LateAttrs = 0, 5459 LocalInstantiationScope *OuterMostScope = 0); 5460 5461 bool 5462 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5463 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5464 TemplateSpecializationKind TSK, 5465 bool Complain = true); 5466 5467 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5468 CXXRecordDecl *Instantiation, 5469 const MultiLevelTemplateArgumentList &TemplateArgs, 5470 TemplateSpecializationKind TSK); 5471 5472 void InstantiateClassTemplateSpecializationMembers( 5473 SourceLocation PointOfInstantiation, 5474 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5475 TemplateSpecializationKind TSK); 5476 5477 NestedNameSpecifierLoc 5478 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5479 const MultiLevelTemplateArgumentList &TemplateArgs); 5480 5481 DeclarationNameInfo 5482 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5483 const MultiLevelTemplateArgumentList &TemplateArgs); 5484 TemplateName 5485 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5486 SourceLocation Loc, 5487 const MultiLevelTemplateArgumentList &TemplateArgs); 5488 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5489 TemplateArgumentListInfo &Result, 5490 const MultiLevelTemplateArgumentList &TemplateArgs); 5491 5492 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5493 FunctionDecl *Function, 5494 bool Recursive = false, 5495 bool DefinitionRequired = false); 5496 void InstantiateStaticDataMemberDefinition( 5497 SourceLocation PointOfInstantiation, 5498 VarDecl *Var, 5499 bool Recursive = false, 5500 bool DefinitionRequired = false); 5501 5502 void InstantiateMemInitializers(CXXConstructorDecl *New, 5503 const CXXConstructorDecl *Tmpl, 5504 const MultiLevelTemplateArgumentList &TemplateArgs); 5505 5506 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5507 const MultiLevelTemplateArgumentList &TemplateArgs); 5508 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5509 const MultiLevelTemplateArgumentList &TemplateArgs); 5510 5511 // Objective-C declarations. 5512 enum ObjCContainerKind { 5513 OCK_None = -1, 5514 OCK_Interface = 0, 5515 OCK_Protocol, 5516 OCK_Category, 5517 OCK_ClassExtension, 5518 OCK_Implementation, 5519 OCK_CategoryImplementation 5520 }; 5521 ObjCContainerKind getObjCContainerKind() const; 5522 5523 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5524 IdentifierInfo *ClassName, 5525 SourceLocation ClassLoc, 5526 IdentifierInfo *SuperName, 5527 SourceLocation SuperLoc, 5528 Decl * const *ProtoRefs, 5529 unsigned NumProtoRefs, 5530 const SourceLocation *ProtoLocs, 5531 SourceLocation EndProtoLoc, 5532 AttributeList *AttrList); 5533 5534 Decl *ActOnCompatiblityAlias( 5535 SourceLocation AtCompatibilityAliasLoc, 5536 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5537 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5538 5539 bool CheckForwardProtocolDeclarationForCircularDependency( 5540 IdentifierInfo *PName, 5541 SourceLocation &PLoc, SourceLocation PrevLoc, 5542 const ObjCList<ObjCProtocolDecl> &PList); 5543 5544 Decl *ActOnStartProtocolInterface( 5545 SourceLocation AtProtoInterfaceLoc, 5546 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5547 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5548 const SourceLocation *ProtoLocs, 5549 SourceLocation EndProtoLoc, 5550 AttributeList *AttrList); 5551 5552 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5553 IdentifierInfo *ClassName, 5554 SourceLocation ClassLoc, 5555 IdentifierInfo *CategoryName, 5556 SourceLocation CategoryLoc, 5557 Decl * const *ProtoRefs, 5558 unsigned NumProtoRefs, 5559 const SourceLocation *ProtoLocs, 5560 SourceLocation EndProtoLoc); 5561 5562 Decl *ActOnStartClassImplementation( 5563 SourceLocation AtClassImplLoc, 5564 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5565 IdentifierInfo *SuperClassname, 5566 SourceLocation SuperClassLoc); 5567 5568 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5569 IdentifierInfo *ClassName, 5570 SourceLocation ClassLoc, 5571 IdentifierInfo *CatName, 5572 SourceLocation CatLoc); 5573 5574 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5575 ArrayRef<Decl *> Decls); 5576 5577 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5578 IdentifierInfo **IdentList, 5579 SourceLocation *IdentLocs, 5580 unsigned NumElts); 5581 5582 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5583 const IdentifierLocPair *IdentList, 5584 unsigned NumElts, 5585 AttributeList *attrList); 5586 5587 void FindProtocolDeclaration(bool WarnOnDeclarations, 5588 const IdentifierLocPair *ProtocolId, 5589 unsigned NumProtocols, 5590 SmallVectorImpl<Decl *> &Protocols); 5591 5592 /// Ensure attributes are consistent with type. 5593 /// \param [in, out] Attributes The attributes to check; they will 5594 /// be modified to be consistent with \arg PropertyTy. 5595 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5596 SourceLocation Loc, 5597 unsigned &Attributes); 5598 5599 /// Process the specified property declaration and create decls for the 5600 /// setters and getters as needed. 5601 /// \param property The property declaration being processed 5602 /// \param DC The semantic container for the property 5603 /// \param redeclaredProperty Declaration for property if redeclared 5604 /// in class extension. 5605 /// \param lexicalDC Container for redeclaredProperty. 5606 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5607 ObjCContainerDecl *DC, 5608 ObjCPropertyDecl *redeclaredProperty = 0, 5609 ObjCContainerDecl *lexicalDC = 0); 5610 5611 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5612 ObjCPropertyDecl *SuperProperty, 5613 const IdentifierInfo *Name); 5614 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5615 5616 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5617 ObjCMethodDecl *MethodDecl, 5618 bool IsInstance); 5619 5620 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5621 5622 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5623 ObjCInterfaceDecl *ID); 5624 5625 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5626 ObjCProtocolDecl *PDecl); 5627 5628 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5629 Decl **allMethods = 0, unsigned allNum = 0, 5630 Decl **allProperties = 0, unsigned pNum = 0, 5631 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5632 5633 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5634 SourceLocation LParenLoc, 5635 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5636 Selector GetterSel, Selector SetterSel, 5637 bool *OverridingProperty, 5638 tok::ObjCKeywordKind MethodImplKind, 5639 DeclContext *lexicalDC = 0); 5640 5641 Decl *ActOnPropertyImplDecl(Scope *S, 5642 SourceLocation AtLoc, 5643 SourceLocation PropertyLoc, 5644 bool ImplKind, 5645 IdentifierInfo *PropertyId, 5646 IdentifierInfo *PropertyIvar, 5647 SourceLocation PropertyIvarLoc); 5648 5649 enum ObjCSpecialMethodKind { 5650 OSMK_None, 5651 OSMK_Alloc, 5652 OSMK_New, 5653 OSMK_Copy, 5654 OSMK_RetainingInit, 5655 OSMK_NonRetainingInit 5656 }; 5657 5658 struct ObjCArgInfo { 5659 IdentifierInfo *Name; 5660 SourceLocation NameLoc; 5661 // The Type is null if no type was specified, and the DeclSpec is invalid 5662 // in this case. 5663 ParsedType Type; 5664 ObjCDeclSpec DeclSpec; 5665 5666 /// ArgAttrs - Attribute list for this argument. 5667 AttributeList *ArgAttrs; 5668 }; 5669 5670 Decl *ActOnMethodDeclaration( 5671 Scope *S, 5672 SourceLocation BeginLoc, // location of the + or -. 5673 SourceLocation EndLoc, // location of the ; or {. 5674 tok::TokenKind MethodType, 5675 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5676 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5677 // optional arguments. The number of types/arguments is obtained 5678 // from the Sel.getNumArgs(). 5679 ObjCArgInfo *ArgInfo, 5680 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5681 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5682 bool isVariadic, bool MethodDefinition); 5683 5684 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5685 // Will search "local" class/category implementations for a method decl. 5686 // Will also search in class's root looking for instance method. 5687 // Returns 0 if no method is found. 5688 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5689 ObjCInterfaceDecl *CDecl); 5690 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5691 ObjCInterfaceDecl *ClassDecl); 5692 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5693 const ObjCObjectPointerType *OPT, 5694 bool IsInstance); 5695 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5696 bool IsInstance); 5697 5698 bool inferObjCARCLifetime(ValueDecl *decl); 5699 5700 ExprResult 5701 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5702 Expr *BaseExpr, 5703 SourceLocation OpLoc, 5704 DeclarationName MemberName, 5705 SourceLocation MemberLoc, 5706 SourceLocation SuperLoc, QualType SuperType, 5707 bool Super); 5708 5709 ExprResult 5710 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5711 IdentifierInfo &propertyName, 5712 SourceLocation receiverNameLoc, 5713 SourceLocation propertyNameLoc); 5714 5715 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5716 5717 /// \brief Describes the kind of message expression indicated by a message 5718 /// send that starts with an identifier. 5719 enum ObjCMessageKind { 5720 /// \brief The message is sent to 'super'. 5721 ObjCSuperMessage, 5722 /// \brief The message is an instance message. 5723 ObjCInstanceMessage, 5724 /// \brief The message is a class message, and the identifier is a type 5725 /// name. 5726 ObjCClassMessage 5727 }; 5728 5729 ObjCMessageKind getObjCMessageKind(Scope *S, 5730 IdentifierInfo *Name, 5731 SourceLocation NameLoc, 5732 bool IsSuper, 5733 bool HasTrailingDot, 5734 ParsedType &ReceiverType); 5735 5736 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5737 Selector Sel, 5738 SourceLocation LBracLoc, 5739 ArrayRef<SourceLocation> SelectorLocs, 5740 SourceLocation RBracLoc, 5741 MultiExprArg Args); 5742 5743 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5744 QualType ReceiverType, 5745 SourceLocation SuperLoc, 5746 Selector Sel, 5747 ObjCMethodDecl *Method, 5748 SourceLocation LBracLoc, 5749 ArrayRef<SourceLocation> SelectorLocs, 5750 SourceLocation RBracLoc, 5751 MultiExprArg Args, 5752 bool isImplicit = false); 5753 5754 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5755 bool isSuperReceiver, 5756 SourceLocation Loc, 5757 Selector Sel, 5758 ObjCMethodDecl *Method, 5759 MultiExprArg Args); 5760 5761 ExprResult ActOnClassMessage(Scope *S, 5762 ParsedType Receiver, 5763 Selector Sel, 5764 SourceLocation LBracLoc, 5765 ArrayRef<SourceLocation> SelectorLocs, 5766 SourceLocation RBracLoc, 5767 MultiExprArg Args); 5768 5769 ExprResult BuildInstanceMessage(Expr *Receiver, 5770 QualType ReceiverType, 5771 SourceLocation SuperLoc, 5772 Selector Sel, 5773 ObjCMethodDecl *Method, 5774 SourceLocation LBracLoc, 5775 ArrayRef<SourceLocation> SelectorLocs, 5776 SourceLocation RBracLoc, 5777 MultiExprArg Args, 5778 bool isImplicit = false); 5779 5780 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5781 QualType ReceiverType, 5782 SourceLocation Loc, 5783 Selector Sel, 5784 ObjCMethodDecl *Method, 5785 MultiExprArg Args); 5786 5787 ExprResult ActOnInstanceMessage(Scope *S, 5788 Expr *Receiver, 5789 Selector Sel, 5790 SourceLocation LBracLoc, 5791 ArrayRef<SourceLocation> SelectorLocs, 5792 SourceLocation RBracLoc, 5793 MultiExprArg Args); 5794 5795 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5796 ObjCBridgeCastKind Kind, 5797 SourceLocation BridgeKeywordLoc, 5798 TypeSourceInfo *TSInfo, 5799 Expr *SubExpr); 5800 5801 ExprResult ActOnObjCBridgedCast(Scope *S, 5802 SourceLocation LParenLoc, 5803 ObjCBridgeCastKind Kind, 5804 SourceLocation BridgeKeywordLoc, 5805 ParsedType Type, 5806 SourceLocation RParenLoc, 5807 Expr *SubExpr); 5808 5809 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5810 5811 /// \brief Check whether the given new method is a valid override of the 5812 /// given overridden method, and set any properties that should be inherited. 5813 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5814 const ObjCMethodDecl *Overridden, 5815 bool IsImplementation); 5816 5817 /// \brief Check whether the given method overrides any methods in its class, 5818 /// calling \c CheckObjCMethodOverride for each overridden method. 5819 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5820 5821 enum PragmaOptionsAlignKind { 5822 POAK_Native, // #pragma options align=native 5823 POAK_Natural, // #pragma options align=natural 5824 POAK_Packed, // #pragma options align=packed 5825 POAK_Power, // #pragma options align=power 5826 POAK_Mac68k, // #pragma options align=mac68k 5827 POAK_Reset // #pragma options align=reset 5828 }; 5829 5830 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5831 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5832 SourceLocation PragmaLoc, 5833 SourceLocation KindLoc); 5834 5835 enum PragmaPackKind { 5836 PPK_Default, // #pragma pack([n]) 5837 PPK_Show, // #pragma pack(show), only supported by MSVC. 5838 PPK_Push, // #pragma pack(push, [identifier], [n]) 5839 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5840 }; 5841 5842 enum PragmaMSStructKind { 5843 PMSST_OFF, // #pragms ms_struct off 5844 PMSST_ON // #pragms ms_struct on 5845 }; 5846 5847 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5848 void ActOnPragmaPack(PragmaPackKind Kind, 5849 IdentifierInfo *Name, 5850 Expr *Alignment, 5851 SourceLocation PragmaLoc, 5852 SourceLocation LParenLoc, 5853 SourceLocation RParenLoc); 5854 5855 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5856 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5857 5858 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5859 void ActOnPragmaUnused(const Token &Identifier, 5860 Scope *curScope, 5861 SourceLocation PragmaLoc); 5862 5863 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5864 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5865 SourceLocation PragmaLoc); 5866 5867 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5868 SourceLocation Loc); 5869 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5870 5871 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5872 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5873 SourceLocation PragmaLoc, 5874 SourceLocation WeakNameLoc); 5875 5876 /// ActOnPragmaRedefineExtname - Called on well formed 5877 /// #pragma redefine_extname oldname newname. 5878 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 5879 IdentifierInfo* AliasName, 5880 SourceLocation PragmaLoc, 5881 SourceLocation WeakNameLoc, 5882 SourceLocation AliasNameLoc); 5883 5884 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5885 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5886 IdentifierInfo* AliasName, 5887 SourceLocation PragmaLoc, 5888 SourceLocation WeakNameLoc, 5889 SourceLocation AliasNameLoc); 5890 5891 /// ActOnPragmaFPContract - Called on well formed 5892 /// #pragma {STDC,OPENCL} FP_CONTRACT 5893 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5894 5895 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5896 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5897 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5898 5899 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5900 void AddMsStructLayoutForRecord(RecordDecl *RD); 5901 5902 /// FreePackedContext - Deallocate and null out PackContext. 5903 void FreePackedContext(); 5904 5905 /// PushNamespaceVisibilityAttr - Note that we've entered a 5906 /// namespace with a visibility attribute. 5907 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5908 SourceLocation Loc); 5909 5910 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5911 /// add an appropriate visibility attribute. 5912 void AddPushedVisibilityAttribute(Decl *RD); 5913 5914 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5915 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5916 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5917 5918 /// FreeVisContext - Deallocate and null out VisContext. 5919 void FreeVisContext(); 5920 5921 /// AddCFAuditedAttribute - Check whether we're currently within 5922 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5923 /// the appropriate attribute. 5924 void AddCFAuditedAttribute(Decl *D); 5925 5926 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5927 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5928 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5929 5930 /// \brief The kind of conversion being performed. 5931 enum CheckedConversionKind { 5932 /// \brief An implicit conversion. 5933 CCK_ImplicitConversion, 5934 /// \brief A C-style cast. 5935 CCK_CStyleCast, 5936 /// \brief A functional-style cast. 5937 CCK_FunctionalCast, 5938 /// \brief A cast other than a C-style cast. 5939 CCK_OtherCast 5940 }; 5941 5942 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5943 /// cast. If there is already an implicit cast, merge into the existing one. 5944 /// If isLvalue, the result of the cast is an lvalue. 5945 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5946 ExprValueKind VK = VK_RValue, 5947 const CXXCastPath *BasePath = 0, 5948 CheckedConversionKind CCK 5949 = CCK_ImplicitConversion); 5950 5951 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5952 /// to the conversion from scalar type ScalarTy to the Boolean type. 5953 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5954 5955 /// IgnoredValueConversions - Given that an expression's result is 5956 /// syntactically ignored, perform any conversions that are 5957 /// required. 5958 ExprResult IgnoredValueConversions(Expr *E); 5959 5960 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5961 // functions and arrays to their respective pointers (C99 6.3.2.1). 5962 ExprResult UsualUnaryConversions(Expr *E); 5963 5964 // DefaultFunctionArrayConversion - converts functions and arrays 5965 // to their respective pointers (C99 6.3.2.1). 5966 ExprResult DefaultFunctionArrayConversion(Expr *E); 5967 5968 // DefaultFunctionArrayLvalueConversion - converts functions and 5969 // arrays to their respective pointers and performs the 5970 // lvalue-to-rvalue conversion. 5971 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5972 5973 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5974 // the operand. This is DefaultFunctionArrayLvalueConversion, 5975 // except that it assumes the operand isn't of function or array 5976 // type. 5977 ExprResult DefaultLvalueConversion(Expr *E); 5978 5979 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5980 // do not have a prototype. Integer promotions are performed on each 5981 // argument, and arguments that have type float are promoted to double. 5982 ExprResult DefaultArgumentPromotion(Expr *E); 5983 5984 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5985 enum VariadicCallType { 5986 VariadicFunction, 5987 VariadicBlock, 5988 VariadicMethod, 5989 VariadicConstructor, 5990 VariadicDoesNotApply 5991 }; 5992 5993 /// GatherArgumentsForCall - Collector argument expressions for various 5994 /// form of call prototypes. 5995 bool GatherArgumentsForCall(SourceLocation CallLoc, 5996 FunctionDecl *FDecl, 5997 const FunctionProtoType *Proto, 5998 unsigned FirstProtoArg, 5999 Expr **Args, unsigned NumArgs, 6000 SmallVector<Expr *, 8> &AllArgs, 6001 VariadicCallType CallType = VariadicDoesNotApply, 6002 bool AllowExplicit = false); 6003 6004 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 6005 // will warn if the resulting type is not a POD type. 6006 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 6007 FunctionDecl *FDecl); 6008 6009 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 6010 // operands and then handles various conversions that are common to binary 6011 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 6012 // routine returns the first non-arithmetic type found. The client is 6013 // responsible for emitting appropriate error diagnostics. 6014 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 6015 bool IsCompAssign = false); 6016 6017 /// AssignConvertType - All of the 'assignment' semantic checks return this 6018 /// enum to indicate whether the assignment was allowed. These checks are 6019 /// done for simple assignments, as well as initialization, return from 6020 /// function, argument passing, etc. The query is phrased in terms of a 6021 /// source and destination type. 6022 enum AssignConvertType { 6023 /// Compatible - the types are compatible according to the standard. 6024 Compatible, 6025 6026 /// PointerToInt - The assignment converts a pointer to an int, which we 6027 /// accept as an extension. 6028 PointerToInt, 6029 6030 /// IntToPointer - The assignment converts an int to a pointer, which we 6031 /// accept as an extension. 6032 IntToPointer, 6033 6034 /// FunctionVoidPointer - The assignment is between a function pointer and 6035 /// void*, which the standard doesn't allow, but we accept as an extension. 6036 FunctionVoidPointer, 6037 6038 /// IncompatiblePointer - The assignment is between two pointers types that 6039 /// are not compatible, but we accept them as an extension. 6040 IncompatiblePointer, 6041 6042 /// IncompatiblePointer - The assignment is between two pointers types which 6043 /// point to integers which have a different sign, but are otherwise 6044 /// identical. This is a subset of the above, but broken out because it's by 6045 /// far the most common case of incompatible pointers. 6046 IncompatiblePointerSign, 6047 6048 /// CompatiblePointerDiscardsQualifiers - The assignment discards 6049 /// c/v/r qualifiers, which we accept as an extension. 6050 CompatiblePointerDiscardsQualifiers, 6051 6052 /// IncompatiblePointerDiscardsQualifiers - The assignment 6053 /// discards qualifiers that we don't permit to be discarded, 6054 /// like address spaces. 6055 IncompatiblePointerDiscardsQualifiers, 6056 6057 /// IncompatibleNestedPointerQualifiers - The assignment is between two 6058 /// nested pointer types, and the qualifiers other than the first two 6059 /// levels differ e.g. char ** -> const char **, but we accept them as an 6060 /// extension. 6061 IncompatibleNestedPointerQualifiers, 6062 6063 /// IncompatibleVectors - The assignment is between two vector types that 6064 /// have the same size, which we accept as an extension. 6065 IncompatibleVectors, 6066 6067 /// IntToBlockPointer - The assignment converts an int to a block 6068 /// pointer. We disallow this. 6069 IntToBlockPointer, 6070 6071 /// IncompatibleBlockPointer - The assignment is between two block 6072 /// pointers types that are not compatible. 6073 IncompatibleBlockPointer, 6074 6075 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6076 /// id type and something else (that is incompatible with it). For example, 6077 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6078 IncompatibleObjCQualifiedId, 6079 6080 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6081 /// object with __weak qualifier. 6082 IncompatibleObjCWeakRef, 6083 6084 /// Incompatible - We reject this conversion outright, it is invalid to 6085 /// represent it in the AST. 6086 Incompatible 6087 }; 6088 6089 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6090 /// assignment conversion type specified by ConvTy. This returns true if the 6091 /// conversion was invalid or false if the conversion was accepted. 6092 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6093 SourceLocation Loc, 6094 QualType DstType, QualType SrcType, 6095 Expr *SrcExpr, AssignmentAction Action, 6096 bool *Complained = 0); 6097 6098 /// CheckAssignmentConstraints - Perform type checking for assignment, 6099 /// argument passing, variable initialization, and function return values. 6100 /// C99 6.5.16. 6101 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6102 QualType LHSType, 6103 QualType RHSType); 6104 6105 /// Check assignment constraints and prepare for a conversion of the 6106 /// RHS to the LHS type. 6107 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6108 ExprResult &RHS, 6109 CastKind &Kind); 6110 6111 // CheckSingleAssignmentConstraints - Currently used by 6112 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6113 // this routine performs the default function/array converions. 6114 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6115 ExprResult &RHS, 6116 bool Diagnose = true); 6117 6118 // \brief If the lhs type is a transparent union, check whether we 6119 // can initialize the transparent union with the given expression. 6120 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6121 ExprResult &RHS); 6122 6123 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6124 6125 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6126 6127 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6128 AssignmentAction Action, 6129 bool AllowExplicit = false); 6130 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6131 AssignmentAction Action, 6132 bool AllowExplicit, 6133 ImplicitConversionSequence& ICS); 6134 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6135 const ImplicitConversionSequence& ICS, 6136 AssignmentAction Action, 6137 CheckedConversionKind CCK 6138 = CCK_ImplicitConversion); 6139 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6140 const StandardConversionSequence& SCS, 6141 AssignmentAction Action, 6142 CheckedConversionKind CCK); 6143 6144 /// the following "Check" methods will return a valid/converted QualType 6145 /// or a null QualType (indicating an error diagnostic was issued). 6146 6147 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6148 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6149 ExprResult &RHS); 6150 QualType CheckPointerToMemberOperands( // C++ 5.5 6151 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6152 SourceLocation OpLoc, bool isIndirect); 6153 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6154 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6155 bool IsDivide); 6156 QualType CheckRemainderOperands( // C99 6.5.5 6157 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6158 bool IsCompAssign = false); 6159 QualType CheckAdditionOperands( // C99 6.5.6 6160 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6161 QualType* CompLHSTy = 0); 6162 QualType CheckSubtractionOperands( // C99 6.5.6 6163 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6164 QualType* CompLHSTy = 0); 6165 QualType CheckShiftOperands( // C99 6.5.7 6166 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6167 bool IsCompAssign = false); 6168 QualType CheckCompareOperands( // C99 6.5.8/9 6169 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6170 bool isRelational); 6171 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6172 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6173 bool IsCompAssign = false); 6174 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6175 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6176 // CheckAssignmentOperands is used for both simple and compound assignment. 6177 // For simple assignment, pass both expressions and a null converted type. 6178 // For compound assignment, pass both expressions and the converted type. 6179 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6180 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6181 6182 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6183 UnaryOperatorKind Opcode, Expr *Op); 6184 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6185 BinaryOperatorKind Opcode, 6186 Expr *LHS, Expr *RHS); 6187 ExprResult checkPseudoObjectRValue(Expr *E); 6188 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6189 6190 QualType CheckConditionalOperands( // C99 6.5.15 6191 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6192 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6193 QualType CXXCheckConditionalOperands( // C++ 5.16 6194 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6195 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6196 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6197 bool *NonStandardCompositeType = 0); 6198 QualType FindCompositePointerType(SourceLocation Loc, 6199 ExprResult &E1, ExprResult &E2, 6200 bool *NonStandardCompositeType = 0) { 6201 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6202 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6203 NonStandardCompositeType); 6204 E1 = Owned(E1Tmp); 6205 E2 = Owned(E2Tmp); 6206 return Composite; 6207 } 6208 6209 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6210 SourceLocation QuestionLoc); 6211 6212 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6213 SourceLocation QuestionLoc); 6214 6215 /// type checking for vector binary operators. 6216 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6217 SourceLocation Loc, bool IsCompAssign); 6218 QualType GetSignedVectorType(QualType V); 6219 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6220 SourceLocation Loc, bool isRelational); 6221 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6222 SourceLocation Loc); 6223 6224 /// type checking declaration initializers (C99 6.7.8) 6225 bool CheckForConstantInitializer(Expr *e, QualType t); 6226 6227 // type checking C++ declaration initializers (C++ [dcl.init]). 6228 6229 /// ReferenceCompareResult - Expresses the result of comparing two 6230 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6231 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6232 enum ReferenceCompareResult { 6233 /// Ref_Incompatible - The two types are incompatible, so direct 6234 /// reference binding is not possible. 6235 Ref_Incompatible = 0, 6236 /// Ref_Related - The two types are reference-related, which means 6237 /// that their unqualified forms (T1 and T2) are either the same 6238 /// or T1 is a base class of T2. 6239 Ref_Related, 6240 /// Ref_Compatible_With_Added_Qualification - The two types are 6241 /// reference-compatible with added qualification, meaning that 6242 /// they are reference-compatible and the qualifiers on T1 (cv1) 6243 /// are greater than the qualifiers on T2 (cv2). 6244 Ref_Compatible_With_Added_Qualification, 6245 /// Ref_Compatible - The two types are reference-compatible and 6246 /// have equivalent qualifiers (cv1 == cv2). 6247 Ref_Compatible 6248 }; 6249 6250 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6251 QualType T1, QualType T2, 6252 bool &DerivedToBase, 6253 bool &ObjCConversion, 6254 bool &ObjCLifetimeConversion); 6255 6256 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6257 Expr *CastExpr, CastKind &CastKind, 6258 ExprValueKind &VK, CXXCastPath &Path); 6259 6260 /// \brief Force an expression with unknown-type to an expression of the 6261 /// given type. 6262 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6263 6264 // CheckVectorCast - check type constraints for vectors. 6265 // Since vectors are an extension, there are no C standard reference for this. 6266 // We allow casting between vectors and integer datatypes of the same size. 6267 // returns true if the cast is invalid 6268 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6269 CastKind &Kind); 6270 6271 // CheckExtVectorCast - check type constraints for extended vectors. 6272 // Since vectors are an extension, there are no C standard reference for this. 6273 // We allow casting between vectors and integer datatypes of the same size, 6274 // or vectors and the element type of that vector. 6275 // returns the cast expr 6276 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6277 CastKind &Kind); 6278 6279 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6280 SourceLocation LParenLoc, 6281 Expr *CastExpr, 6282 SourceLocation RParenLoc); 6283 6284 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6285 6286 /// \brief Checks for invalid conversions and casts between 6287 /// retainable pointers and other pointer kinds. 6288 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6289 QualType castType, Expr *&op, 6290 CheckedConversionKind CCK); 6291 6292 Expr *stripARCUnbridgedCast(Expr *e); 6293 void diagnoseARCUnbridgedCast(Expr *e); 6294 6295 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6296 QualType ExprType); 6297 6298 /// checkRetainCycles - Check whether an Objective-C message send 6299 /// might create an obvious retain cycle. 6300 void checkRetainCycles(ObjCMessageExpr *msg); 6301 void checkRetainCycles(Expr *receiver, Expr *argument); 6302 6303 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6304 /// to weak/__unsafe_unretained type. 6305 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6306 6307 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6308 /// to weak/__unsafe_unretained expression. 6309 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6310 6311 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6312 /// \param Method - May be null. 6313 /// \param [out] ReturnType - The return type of the send. 6314 /// \return true iff there were any incompatible types. 6315 bool CheckMessageArgumentTypes(QualType ReceiverType, 6316 Expr **Args, unsigned NumArgs, Selector Sel, 6317 ObjCMethodDecl *Method, bool isClassMessage, 6318 bool isSuperMessage, 6319 SourceLocation lbrac, SourceLocation rbrac, 6320 QualType &ReturnType, ExprValueKind &VK); 6321 6322 /// \brief Determine the result of a message send expression based on 6323 /// the type of the receiver, the method expected to receive the message, 6324 /// and the form of the message send. 6325 QualType getMessageSendResultType(QualType ReceiverType, 6326 ObjCMethodDecl *Method, 6327 bool isClassMessage, bool isSuperMessage); 6328 6329 /// \brief If the given expression involves a message send to a method 6330 /// with a related result type, emit a note describing what happened. 6331 void EmitRelatedResultTypeNote(const Expr *E); 6332 6333 /// CheckBooleanCondition - Diagnose problems involving the use of 6334 /// the given expression as a boolean condition (e.g. in an if 6335 /// statement). Also performs the standard function and array 6336 /// decays, possibly changing the input variable. 6337 /// 6338 /// \param Loc - A location associated with the condition, e.g. the 6339 /// 'if' keyword. 6340 /// \return true iff there were any errors 6341 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6342 6343 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6344 Expr *SubExpr); 6345 6346 /// DiagnoseAssignmentAsCondition - Given that an expression is 6347 /// being used as a boolean condition, warn if it's an assignment. 6348 void DiagnoseAssignmentAsCondition(Expr *E); 6349 6350 /// \brief Redundant parentheses over an equality comparison can indicate 6351 /// that the user intended an assignment used as condition. 6352 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6353 6354 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6355 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6356 6357 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6358 /// the specified width and sign. If an overflow occurs, detect it and emit 6359 /// the specified diagnostic. 6360 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6361 unsigned NewWidth, bool NewSign, 6362 SourceLocation Loc, unsigned DiagID); 6363 6364 /// Checks that the Objective-C declaration is declared in the global scope. 6365 /// Emits an error and marks the declaration as invalid if it's not declared 6366 /// in the global scope. 6367 bool CheckObjCDeclScope(Decl *D); 6368 6369 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6370 /// and reports the appropriate diagnostics. Returns false on success. 6371 /// Can optionally return the value of the expression. 6372 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6373 PartialDiagnostic Diag, 6374 bool AllowFold, 6375 PartialDiagnostic FoldDiag); 6376 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6377 PartialDiagnostic Diag, 6378 bool AllowFold = true) { 6379 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6380 PDiag(0)); 6381 } 6382 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6383 6384 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6385 /// the correct width, and that the field type is valid. 6386 /// Returns false on success. 6387 /// Can optionally return whether the bit-field is of width 0 6388 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6389 QualType FieldTy, Expr *BitWidth, 6390 bool *ZeroWidth = 0); 6391 6392 enum CUDAFunctionTarget { 6393 CFT_Device, 6394 CFT_Global, 6395 CFT_Host, 6396 CFT_HostDevice 6397 }; 6398 6399 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6400 6401 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6402 CUDAFunctionTarget CalleeTarget); 6403 6404 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6405 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6406 IdentifyCUDATarget(Callee)); 6407 } 6408 6409 /// \name Code completion 6410 //@{ 6411 /// \brief Describes the context in which code completion occurs. 6412 enum ParserCompletionContext { 6413 /// \brief Code completion occurs at top-level or namespace context. 6414 PCC_Namespace, 6415 /// \brief Code completion occurs within a class, struct, or union. 6416 PCC_Class, 6417 /// \brief Code completion occurs within an Objective-C interface, protocol, 6418 /// or category. 6419 PCC_ObjCInterface, 6420 /// \brief Code completion occurs within an Objective-C implementation or 6421 /// category implementation 6422 PCC_ObjCImplementation, 6423 /// \brief Code completion occurs within the list of instance variables 6424 /// in an Objective-C interface, protocol, category, or implementation. 6425 PCC_ObjCInstanceVariableList, 6426 /// \brief Code completion occurs following one or more template 6427 /// headers. 6428 PCC_Template, 6429 /// \brief Code completion occurs following one or more template 6430 /// headers within a class. 6431 PCC_MemberTemplate, 6432 /// \brief Code completion occurs within an expression. 6433 PCC_Expression, 6434 /// \brief Code completion occurs within a statement, which may 6435 /// also be an expression or a declaration. 6436 PCC_Statement, 6437 /// \brief Code completion occurs at the beginning of the 6438 /// initialization statement (or expression) in a for loop. 6439 PCC_ForInit, 6440 /// \brief Code completion occurs within the condition of an if, 6441 /// while, switch, or for statement. 6442 PCC_Condition, 6443 /// \brief Code completion occurs within the body of a function on a 6444 /// recovery path, where we do not have a specific handle on our position 6445 /// in the grammar. 6446 PCC_RecoveryInFunction, 6447 /// \brief Code completion occurs where only a type is permitted. 6448 PCC_Type, 6449 /// \brief Code completion occurs in a parenthesized expression, which 6450 /// might also be a type cast. 6451 PCC_ParenthesizedExpression, 6452 /// \brief Code completion occurs within a sequence of declaration 6453 /// specifiers within a function, method, or block. 6454 PCC_LocalDeclarationSpecifiers 6455 }; 6456 6457 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6458 void CodeCompleteOrdinaryName(Scope *S, 6459 ParserCompletionContext CompletionContext); 6460 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6461 bool AllowNonIdentifiers, 6462 bool AllowNestedNameSpecifiers); 6463 6464 struct CodeCompleteExpressionData; 6465 void CodeCompleteExpression(Scope *S, 6466 const CodeCompleteExpressionData &Data); 6467 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6468 SourceLocation OpLoc, 6469 bool IsArrow); 6470 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6471 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6472 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6473 void CodeCompleteCase(Scope *S); 6474 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6475 void CodeCompleteInitializer(Scope *S, Decl *D); 6476 void CodeCompleteReturn(Scope *S); 6477 void CodeCompleteAfterIf(Scope *S); 6478 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6479 6480 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6481 bool EnteringContext); 6482 void CodeCompleteUsing(Scope *S); 6483 void CodeCompleteUsingDirective(Scope *S); 6484 void CodeCompleteNamespaceDecl(Scope *S); 6485 void CodeCompleteNamespaceAliasDecl(Scope *S); 6486 void CodeCompleteOperatorName(Scope *S); 6487 void CodeCompleteConstructorInitializer(Decl *Constructor, 6488 CXXCtorInitializer** Initializers, 6489 unsigned NumInitializers); 6490 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6491 bool AfterAmpersand); 6492 6493 void CodeCompleteObjCAtDirective(Scope *S); 6494 void CodeCompleteObjCAtVisibility(Scope *S); 6495 void CodeCompleteObjCAtStatement(Scope *S); 6496 void CodeCompleteObjCAtExpression(Scope *S); 6497 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6498 void CodeCompleteObjCPropertyGetter(Scope *S); 6499 void CodeCompleteObjCPropertySetter(Scope *S); 6500 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6501 bool IsParameter); 6502 void CodeCompleteObjCMessageReceiver(Scope *S); 6503 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6504 IdentifierInfo **SelIdents, 6505 unsigned NumSelIdents, 6506 bool AtArgumentExpression); 6507 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6508 IdentifierInfo **SelIdents, 6509 unsigned NumSelIdents, 6510 bool AtArgumentExpression, 6511 bool IsSuper = false); 6512 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6513 IdentifierInfo **SelIdents, 6514 unsigned NumSelIdents, 6515 bool AtArgumentExpression, 6516 ObjCInterfaceDecl *Super = 0); 6517 void CodeCompleteObjCForCollection(Scope *S, 6518 DeclGroupPtrTy IterationVar); 6519 void CodeCompleteObjCSelector(Scope *S, 6520 IdentifierInfo **SelIdents, 6521 unsigned NumSelIdents); 6522 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6523 unsigned NumProtocols); 6524 void CodeCompleteObjCProtocolDecl(Scope *S); 6525 void CodeCompleteObjCInterfaceDecl(Scope *S); 6526 void CodeCompleteObjCSuperclass(Scope *S, 6527 IdentifierInfo *ClassName, 6528 SourceLocation ClassNameLoc); 6529 void CodeCompleteObjCImplementationDecl(Scope *S); 6530 void CodeCompleteObjCInterfaceCategory(Scope *S, 6531 IdentifierInfo *ClassName, 6532 SourceLocation ClassNameLoc); 6533 void CodeCompleteObjCImplementationCategory(Scope *S, 6534 IdentifierInfo *ClassName, 6535 SourceLocation ClassNameLoc); 6536 void CodeCompleteObjCPropertyDefinition(Scope *S); 6537 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6538 IdentifierInfo *PropertyName); 6539 void CodeCompleteObjCMethodDecl(Scope *S, 6540 bool IsInstanceMethod, 6541 ParsedType ReturnType); 6542 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6543 bool IsInstanceMethod, 6544 bool AtParameterName, 6545 ParsedType ReturnType, 6546 IdentifierInfo **SelIdents, 6547 unsigned NumSelIdents); 6548 void CodeCompletePreprocessorDirective(bool InConditional); 6549 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6550 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6551 void CodeCompletePreprocessorExpression(); 6552 void CodeCompletePreprocessorMacroArgument(Scope *S, 6553 IdentifierInfo *Macro, 6554 MacroInfo *MacroInfo, 6555 unsigned Argument); 6556 void CodeCompleteNaturalLanguage(); 6557 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6558 SmallVectorImpl<CodeCompletionResult> &Results); 6559 //@} 6560 6561 //===--------------------------------------------------------------------===// 6562 // Extra semantic analysis beyond the C type system 6563 6564public: 6565 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6566 unsigned ByteNo) const; 6567 6568private: 6569 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6570 const ArraySubscriptExpr *ASE=0, 6571 bool AllowOnePastEnd=true, bool IndexNegated=false); 6572 void CheckArrayAccess(const Expr *E); 6573 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6574 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6575 Expr **Args, unsigned NumArgs); 6576 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6577 6578 bool CheckObjCString(Expr *Arg); 6579 6580 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6581 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6582 6583 bool SemaBuiltinVAStart(CallExpr *TheCall); 6584 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6585 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6586 6587public: 6588 // Used by C++ template instantiation. 6589 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6590 6591private: 6592 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6593 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6594 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6595 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6596 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6597 AtomicExpr::AtomicOp Op); 6598 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6599 llvm::APSInt &Result); 6600 6601 enum FormatStringType { 6602 FST_Scanf, 6603 FST_Printf, 6604 FST_NSString, 6605 FST_Strftime, 6606 FST_Strfmon, 6607 FST_Kprintf, 6608 FST_Unknown 6609 }; 6610 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6611 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6612 bool HasVAListArg, unsigned format_idx, 6613 unsigned firstDataArg, FormatStringType Type, 6614 bool inFunctionCall = true); 6615 6616 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6617 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6618 unsigned format_idx, unsigned firstDataArg, 6619 FormatStringType Type, bool inFunctionCall); 6620 6621 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6622 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6623 unsigned NumArgs, bool IsCXXMember, 6624 SourceLocation Loc, SourceRange Range); 6625 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6626 bool HasVAListArg, unsigned format_idx, 6627 unsigned firstDataArg, FormatStringType Type, 6628 SourceLocation Loc, SourceRange range); 6629 6630 void CheckNonNullArguments(const NonNullAttr *NonNull, 6631 const Expr * const *ExprArgs, 6632 SourceLocation CallSiteLoc); 6633 6634 void CheckMemaccessArguments(const CallExpr *Call, 6635 unsigned BId, 6636 IdentifierInfo *FnName); 6637 6638 void CheckStrlcpycatArguments(const CallExpr *Call, 6639 IdentifierInfo *FnName); 6640 6641 void CheckStrncatArguments(const CallExpr *Call, 6642 IdentifierInfo *FnName); 6643 6644 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6645 SourceLocation ReturnLoc); 6646 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6647 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6648 6649 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6650 Expr *Init); 6651 6652 /// \brief The parser's current scope. 6653 /// 6654 /// The parser maintains this state here. 6655 Scope *CurScope; 6656 6657protected: 6658 friend class Parser; 6659 friend class InitializationSequence; 6660 friend class ASTReader; 6661 friend class ASTWriter; 6662 6663public: 6664 /// \brief Retrieve the parser's current scope. 6665 /// 6666 /// This routine must only be used when it is certain that semantic analysis 6667 /// and the parser are in precisely the same context, which is not the case 6668 /// when, e.g., we are performing any kind of template instantiation. 6669 /// Therefore, the only safe places to use this scope are in the parser 6670 /// itself and in routines directly invoked from the parser and *never* from 6671 /// template substitution or instantiation. 6672 Scope *getCurScope() const { return CurScope; } 6673 6674 Decl *getObjCDeclContext() const; 6675 6676 DeclContext *getCurLexicalContext() const { 6677 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6678 } 6679 6680 AvailabilityResult getCurContextAvailability() const; 6681}; 6682 6683/// \brief RAII object that enters a new expression evaluation context. 6684class EnterExpressionEvaluationContext { 6685 Sema &Actions; 6686 6687public: 6688 EnterExpressionEvaluationContext(Sema &Actions, 6689 Sema::ExpressionEvaluationContext NewContext, 6690 Decl *LambdaContextDecl = 0, 6691 bool IsDecltype = false) 6692 : Actions(Actions) { 6693 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6694 IsDecltype); 6695 } 6696 6697 ~EnterExpressionEvaluationContext() { 6698 Actions.PopExpressionEvaluationContext(); 6699 } 6700}; 6701 6702} // end namespace clang 6703 6704#endif 6705