Sema.h revision 16f1f717af196b1448258857b2e6dcfe144b39d0
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/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Lex/ModuleLoader.h" 32#include "clang/Basic/Specifiers.h" 33#include "clang/Basic/TemplateKinds.h" 34#include "clang/Basic/TypeTraits.h" 35#include "clang/Basic/ExpressionTraits.h" 36#include "llvm/ADT/ArrayRef.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/SmallVector.h" 40#include <deque> 41#include <string> 42 43namespace llvm { 44 class APSInt; 45 template <typename ValueT> struct DenseMapInfo; 46 template <typename ValueT, typename ValueInfoT> class DenseSet; 47 class SmallBitVector; 48} 49 50namespace clang { 51 class ADLResult; 52 class ASTConsumer; 53 class ASTContext; 54 class ASTMutationListener; 55 class ASTReader; 56 class ASTWriter; 57 class ArrayType; 58 class AttributeList; 59 class BlockDecl; 60 class CXXBasePath; 61 class CXXBasePaths; 62 class CXXBindTemporaryExpr; 63 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 64 class CXXConstructorDecl; 65 class CXXConversionDecl; 66 class CXXDestructorDecl; 67 class CXXFieldCollector; 68 class CXXMemberCallExpr; 69 class CXXMethodDecl; 70 class CXXScopeSpec; 71 class CXXTemporary; 72 class CXXTryStmt; 73 class CallExpr; 74 class ClassTemplateDecl; 75 class ClassTemplatePartialSpecializationDecl; 76 class ClassTemplateSpecializationDecl; 77 class CodeCompleteConsumer; 78 class CodeCompletionAllocator; 79 class CodeCompletionResult; 80 class Decl; 81 class DeclAccessPair; 82 class DeclContext; 83 class DeclRefExpr; 84 class DeclaratorDecl; 85 class DeducedTemplateArgument; 86 class DependentDiagnostic; 87 class DesignatedInitExpr; 88 class Designation; 89 class EnumConstantDecl; 90 class Expr; 91 class ExtVectorType; 92 class ExternalSemaSource; 93 class FormatAttr; 94 class FriendDecl; 95 class FunctionDecl; 96 class FunctionProtoType; 97 class FunctionTemplateDecl; 98 class ImplicitConversionSequence; 99 class InitListExpr; 100 class InitializationKind; 101 class InitializationSequence; 102 class InitializedEntity; 103 class IntegerLiteral; 104 class LabelStmt; 105 class LambdaExpr; 106 class LangOptions; 107 class LocalInstantiationScope; 108 class LookupResult; 109 class MacroInfo; 110 class MultiLevelTemplateArgumentList; 111 class NamedDecl; 112 class NonNullAttr; 113 class ObjCCategoryDecl; 114 class ObjCCategoryImplDecl; 115 class ObjCCompatibleAliasDecl; 116 class ObjCContainerDecl; 117 class ObjCImplDecl; 118 class ObjCImplementationDecl; 119 class ObjCInterfaceDecl; 120 class ObjCIvarDecl; 121 template <class T> class ObjCList; 122 class ObjCMessageExpr; 123 class ObjCMethodDecl; 124 class ObjCPropertyDecl; 125 class ObjCProtocolDecl; 126 class OverloadCandidateSet; 127 class OverloadExpr; 128 class ParenListExpr; 129 class ParmVarDecl; 130 class Preprocessor; 131 class PseudoDestructorTypeStorage; 132 class PseudoObjectExpr; 133 class QualType; 134 class StandardConversionSequence; 135 class Stmt; 136 class StringLiteral; 137 class SwitchStmt; 138 class TargetAttributesSema; 139 class TemplateArgument; 140 class TemplateArgumentList; 141 class TemplateArgumentLoc; 142 class TemplateDecl; 143 class TemplateParameterList; 144 class TemplatePartialOrderingContext; 145 class TemplateTemplateParmDecl; 146 class Token; 147 class TypeAliasDecl; 148 class TypedefDecl; 149 class TypedefNameDecl; 150 class TypeLoc; 151 class UnqualifiedId; 152 class UnresolvedLookupExpr; 153 class UnresolvedMemberExpr; 154 class UnresolvedSetImpl; 155 class UnresolvedSetIterator; 156 class UsingDecl; 157 class UsingShadowDecl; 158 class ValueDecl; 159 class VarDecl; 160 class VisibilityAttr; 161 class VisibleDeclConsumer; 162 class IndirectFieldDecl; 163 164namespace sema { 165 class AccessedEntity; 166 class BlockScopeInfo; 167 class CompoundScopeInfo; 168 class DelayedDiagnostic; 169 class FunctionScopeInfo; 170 class LambdaScopeInfo; 171 class PossiblyUnreachableDiag; 172 class TemplateDeductionInfo; 173} 174 175// FIXME: No way to easily map from TemplateTypeParmTypes to 176// TemplateTypeParmDecls, so we have this horrible PointerUnion. 177typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 178 SourceLocation> UnexpandedParameterPack; 179 180/// Sema - This implements semantic analysis and AST building for C. 181class Sema { 182 Sema(const Sema&); // DO NOT IMPLEMENT 183 void operator=(const Sema&); // DO NOT IMPLEMENT 184 mutable const TargetAttributesSema* TheTargetAttributesSema; 185public: 186 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 187 typedef OpaquePtr<TemplateName> TemplateTy; 188 typedef OpaquePtr<QualType> TypeTy; 189 190 OpenCLOptions OpenCLFeatures; 191 FPOptions FPFeatures; 192 193 const LangOptions &LangOpts; 194 Preprocessor &PP; 195 ASTContext &Context; 196 ASTConsumer &Consumer; 197 DiagnosticsEngine &Diags; 198 SourceManager &SourceMgr; 199 200 /// \brief Flag indicating whether or not to collect detailed statistics. 201 bool CollectStats; 202 203 /// \brief Source of additional semantic information. 204 ExternalSemaSource *ExternalSource; 205 206 /// \brief Code-completion consumer. 207 CodeCompleteConsumer *CodeCompleter; 208 209 /// CurContext - This is the current declaration context of parsing. 210 DeclContext *CurContext; 211 212 /// \brief Generally null except when we temporarily switch decl contexts, 213 /// like in \see ActOnObjCTemporaryExitContainerContext. 214 DeclContext *OriginalLexicalContext; 215 216 /// VAListTagName - The declaration name corresponding to __va_list_tag. 217 /// This is used as part of a hack to omit that class from ADL results. 218 DeclarationName VAListTagName; 219 220 /// PackContext - Manages the stack for #pragma pack. An alignment 221 /// of 0 indicates default alignment. 222 void *PackContext; // Really a "PragmaPackStack*" 223 224 bool MSStructPragmaOn; // True when #pragma ms_struct on 225 226 /// VisContext - Manages the stack for #pragma GCC visibility. 227 void *VisContext; // Really a "PragmaVisStack*" 228 229 /// ExprNeedsCleanups - True if the current evaluation context 230 /// requires cleanups to be run at its conclusion. 231 bool ExprNeedsCleanups; 232 233 /// ExprCleanupObjects - This is the stack of objects requiring 234 /// cleanup that are created by the current full expression. The 235 /// element type here is ExprWithCleanups::Object. 236 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 237 238 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 239 240 /// \brief Stack containing information about each of the nested 241 /// function, block, and method scopes that are currently active. 242 /// 243 /// This array is never empty. Clients should ignore the first 244 /// element, which is used to cache a single FunctionScopeInfo 245 /// that's used to parse every top-level function. 246 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 247 248 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 249 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 250 ExtVectorDeclsType; 251 252 /// ExtVectorDecls - This is a list all the extended vector types. This allows 253 /// us to associate a raw vector type with one of the ext_vector type names. 254 /// This is only necessary for issuing pretty diagnostics. 255 ExtVectorDeclsType ExtVectorDecls; 256 257 /// \brief The set of types for which we have already complained about the 258 /// definitions being hidden. 259 /// 260 /// This set is used to suppress redundant diagnostics. 261 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 262 263 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 264 OwningPtr<CXXFieldCollector> FieldCollector; 265 266 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 267 268 /// PureVirtualClassDiagSet - a set of class declarations which we have 269 /// emitted a list of pure virtual functions. Used to prevent emitting the 270 /// same list more than once. 271 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 272 273 /// ParsingInitForAutoVars - a set of declarations with auto types for which 274 /// we are currently parsing the initializer. 275 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 276 277 /// \brief A mapping from external names to the most recent 278 /// locally-scoped external declaration with that name. 279 /// 280 /// This map contains external declarations introduced in local 281 /// scoped, e.g., 282 /// 283 /// \code 284 /// void f() { 285 /// void foo(int, int); 286 /// } 287 /// \endcode 288 /// 289 /// Here, the name "foo" will be associated with the declaration on 290 /// "foo" within f. This name is not visible outside of 291 /// "f". However, we still find it in two cases: 292 /// 293 /// - If we are declaring another external with the name "foo", we 294 /// can find "foo" as a previous declaration, so that the types 295 /// of this external declaration can be checked for 296 /// compatibility. 297 /// 298 /// - If we would implicitly declare "foo" (e.g., due to a call to 299 /// "foo" in C when no prototype or definition is visible), then 300 /// we find this declaration of "foo" and complain that it is 301 /// not visible. 302 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 303 304 /// \brief Look for a locally scoped external declaration by the given name. 305 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 306 findLocallyScopedExternalDecl(DeclarationName Name); 307 308 typedef LazyVector<VarDecl *, ExternalSemaSource, 309 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 310 TentativeDefinitionsType; 311 312 /// \brief All the tentative definitions encountered in the TU. 313 TentativeDefinitionsType TentativeDefinitions; 314 315 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 316 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 317 UnusedFileScopedDeclsType; 318 319 /// \brief The set of file scoped decls seen so far that have not been used 320 /// and must warn if not used. Only contains the first declaration. 321 UnusedFileScopedDeclsType UnusedFileScopedDecls; 322 323 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 324 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 325 DelegatingCtorDeclsType; 326 327 /// \brief All the delegating constructors seen so far in the file, used for 328 /// cycle detection at the end of the TU. 329 DelegatingCtorDeclsType DelegatingCtorDecls; 330 331 /// \brief All the overriding destructors seen during a class definition 332 /// (there could be multiple due to nested classes) that had their exception 333 /// spec checks delayed, plus the overridden destructor. 334 SmallVector<std::pair<const CXXDestructorDecl*, 335 const CXXDestructorDecl*>, 2> 336 DelayedDestructorExceptionSpecChecks; 337 338 /// \brief Callback to the parser to parse templated functions when needed. 339 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 340 LateTemplateParserCB *LateTemplateParser; 341 void *OpaqueParser; 342 343 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 344 LateTemplateParser = LTP; 345 OpaqueParser = P; 346 } 347 348 class DelayedDiagnostics; 349 350 class ParsingDeclState { 351 unsigned SavedStackSize; 352 friend class Sema::DelayedDiagnostics; 353 }; 354 355 class ProcessingContextState { 356 unsigned SavedParsingDepth; 357 unsigned SavedActiveStackBase; 358 friend class Sema::DelayedDiagnostics; 359 }; 360 361 /// A class which encapsulates the logic for delaying diagnostics 362 /// during parsing and other processing. 363 class DelayedDiagnostics { 364 /// \brief The stack of diagnostics that were delayed due to being 365 /// produced during the parsing of a declaration. 366 sema::DelayedDiagnostic *Stack; 367 368 /// \brief The number of objects on the delayed-diagnostics stack. 369 unsigned StackSize; 370 371 /// \brief The current capacity of the delayed-diagnostics stack. 372 unsigned StackCapacity; 373 374 /// \brief The index of the first "active" delayed diagnostic in 375 /// the stack. When parsing class definitions, we ignore active 376 /// delayed diagnostics from the surrounding context. 377 unsigned ActiveStackBase; 378 379 /// \brief The depth of the declarations we're currently parsing. 380 /// This gets saved and reset whenever we enter a class definition. 381 unsigned ParsingDepth; 382 383 public: 384 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 385 ActiveStackBase(0), ParsingDepth(0) {} 386 387 ~DelayedDiagnostics() { 388 delete[] reinterpret_cast<char*>(Stack); 389 } 390 391 /// Adds a delayed diagnostic. 392 void add(const sema::DelayedDiagnostic &diag); 393 394 /// Determines whether diagnostics should be delayed. 395 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 396 397 /// Observe that we've started parsing a declaration. Access and 398 /// deprecation diagnostics will be delayed; when the declaration 399 /// is completed, all active delayed diagnostics will be evaluated 400 /// in its context, and then active diagnostics stack will be 401 /// popped down to the saved depth. 402 ParsingDeclState pushParsingDecl() { 403 ParsingDepth++; 404 405 ParsingDeclState state; 406 state.SavedStackSize = StackSize; 407 return state; 408 } 409 410 /// Observe that we're completed parsing a declaration. 411 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 412 413 /// Observe that we've started processing a different context, the 414 /// contents of which are semantically separate from the 415 /// declarations it may lexically appear in. This sets aside the 416 /// current stack of active diagnostics and starts afresh. 417 ProcessingContextState pushContext() { 418 assert(StackSize >= ActiveStackBase); 419 420 ProcessingContextState state; 421 state.SavedParsingDepth = ParsingDepth; 422 state.SavedActiveStackBase = ActiveStackBase; 423 424 ActiveStackBase = StackSize; 425 ParsingDepth = 0; 426 427 return state; 428 } 429 430 /// Observe that we've stopped processing a context. This 431 /// restores the previous stack of active diagnostics. 432 void popContext(ProcessingContextState state) { 433 assert(ActiveStackBase == StackSize); 434 assert(ParsingDepth == 0); 435 ActiveStackBase = state.SavedActiveStackBase; 436 ParsingDepth = state.SavedParsingDepth; 437 } 438 } DelayedDiagnostics; 439 440 /// A RAII object to temporarily push a declaration context. 441 class ContextRAII { 442 private: 443 Sema &S; 444 DeclContext *SavedContext; 445 ProcessingContextState SavedContextState; 446 447 public: 448 ContextRAII(Sema &S, DeclContext *ContextToPush) 449 : S(S), SavedContext(S.CurContext), 450 SavedContextState(S.DelayedDiagnostics.pushContext()) 451 { 452 assert(ContextToPush && "pushing null context"); 453 S.CurContext = ContextToPush; 454 } 455 456 void pop() { 457 if (!SavedContext) return; 458 S.CurContext = SavedContext; 459 S.DelayedDiagnostics.popContext(SavedContextState); 460 SavedContext = 0; 461 } 462 463 ~ContextRAII() { 464 pop(); 465 } 466 }; 467 468 /// WeakUndeclaredIdentifiers - Identifiers contained in 469 /// #pragma weak before declared. rare. may alias another 470 /// identifier, declared or undeclared 471 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 472 473 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 474 /// #pragma redefine_extname before declared. Used in Solaris system headers 475 /// to define functions that occur in multiple standards to call the version 476 /// in the currently selected standard. 477 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 478 479 480 /// \brief Load weak undeclared identifiers from the external source. 481 void LoadExternalWeakUndeclaredIdentifiers(); 482 483 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 484 /// #pragma weak during processing of other Decls. 485 /// I couldn't figure out a clean way to generate these in-line, so 486 /// we store them here and handle separately -- which is a hack. 487 /// It would be best to refactor this. 488 SmallVector<Decl*,2> WeakTopLevelDecl; 489 490 IdentifierResolver IdResolver; 491 492 /// Translation Unit Scope - useful to Objective-C actions that need 493 /// to lookup file scope declarations in the "ordinary" C decl namespace. 494 /// For example, user-defined classes, built-in "id" type, etc. 495 Scope *TUScope; 496 497 /// \brief The C++ "std" namespace, where the standard library resides. 498 LazyDeclPtr StdNamespace; 499 500 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 501 /// standard library. 502 LazyDeclPtr StdBadAlloc; 503 504 /// \brief The C++ "std::initializer_list" template, which is defined in 505 /// <initializer_list>. 506 ClassTemplateDecl *StdInitializerList; 507 508 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 509 RecordDecl *CXXTypeInfoDecl; 510 511 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 512 RecordDecl *MSVCGuidDecl; 513 514 /// A flag to remember whether the implicit forms of operator new and delete 515 /// have been declared. 516 bool GlobalNewDeleteDeclared; 517 518 519 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 520 /// call was found yet. 521 bool ObjCShouldCallSuperDealloc; 522 /// A flag that is set when parsing a -finalize method and no [super finalize] 523 /// call was found yet. 524 bool ObjCShouldCallSuperFinalize; 525 526 /// \brief Describes how the expressions currently being parsed are 527 /// evaluated at run-time, if at all. 528 enum ExpressionEvaluationContext { 529 /// \brief The current expression and its subexpressions occur within an 530 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 531 /// \c sizeof, where the type of the expression may be significant but 532 /// no code will be generated to evaluate the value of the expression at 533 /// run time. 534 Unevaluated, 535 536 /// \brief The current context is "potentially evaluated" in C++11 terms, 537 /// but the expression is evaluated at compile-time (like the values of 538 /// cases in a switch statment). 539 ConstantEvaluated, 540 541 /// \brief The current expression is potentially evaluated at run time, 542 /// which means that code may be generated to evaluate the value of the 543 /// expression at run time. 544 PotentiallyEvaluated, 545 546 /// \brief The current expression is potentially evaluated, but any 547 /// declarations referenced inside that expression are only used if 548 /// in fact the current expression is used. 549 /// 550 /// This value is used when parsing default function arguments, for which 551 /// we would like to provide diagnostics (e.g., passing non-POD arguments 552 /// through varargs) but do not want to mark declarations as "referenced" 553 /// until the default argument is used. 554 PotentiallyEvaluatedIfUsed 555 }; 556 557 /// \brief Data structure used to record current or nested 558 /// expression evaluation contexts. 559 struct ExpressionEvaluationContextRecord { 560 /// \brief The expression evaluation context. 561 ExpressionEvaluationContext Context; 562 563 /// \brief Whether the enclosing context needed a cleanup. 564 bool ParentNeedsCleanups; 565 566 /// \brief Whether we are in a decltype expression. 567 bool IsDecltype; 568 569 /// \brief The number of active cleanup objects when we entered 570 /// this expression evaluation context. 571 unsigned NumCleanupObjects; 572 573 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 574 575 /// \brief The lambdas that are present within this context, if it 576 /// is indeed an unevaluated context. 577 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 578 579 /// \brief The declaration that provides context for the lambda expression 580 /// if the normal declaration context does not suffice, e.g., in a 581 /// default function argument. 582 Decl *LambdaContextDecl; 583 584 /// \brief The context information used to mangle lambda expressions 585 /// within this context. 586 /// 587 /// This mangling information is allocated lazily, since most contexts 588 /// do not have lambda expressions. 589 LambdaMangleContext *LambdaMangle; 590 591 /// \brief If we are processing a decltype type, a set of call expressions 592 /// for which we have deferred checking the completeness of the return type. 593 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls; 594 595 /// \brief If we are processing a decltype type, a set of temporary binding 596 /// expressions for which we have deferred checking the destructor. 597 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds; 598 599 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 600 unsigned NumCleanupObjects, 601 bool ParentNeedsCleanups, 602 Decl *LambdaContextDecl, 603 bool IsDecltype) 604 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 605 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 606 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 607 608 ~ExpressionEvaluationContextRecord() { 609 delete LambdaMangle; 610 } 611 612 /// \brief Retrieve the mangling context for lambdas. 613 LambdaMangleContext &getLambdaMangleContext() { 614 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 615 if (!LambdaMangle) 616 LambdaMangle = new LambdaMangleContext; 617 return *LambdaMangle; 618 } 619 }; 620 621 /// A stack of expression evaluation contexts. 622 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 623 624 /// SpecialMemberOverloadResult - The overloading result for a special member 625 /// function. 626 /// 627 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 628 /// integer is used to determine whether we have a parameter qualification 629 /// match, the second-lowest is whether we had success in resolving the 630 /// overload to a unique non-deleted function. 631 /// 632 /// The ConstParamMatch bit represents whether, when looking up a copy 633 /// constructor or assignment operator, we found a potential copy 634 /// constructor/assignment operator whose first parameter is const-qualified. 635 /// This is used for determining parameter types of other objects and is 636 /// utterly meaningless on other types of special members. 637 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 638 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 639 public: 640 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 641 : FastFoldingSetNode(ID) 642 {} 643 644 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 645 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 646 647 bool hasSuccess() const { return Pair.getInt() & 0x1; } 648 void setSuccess(bool B) { 649 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 650 } 651 652 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 653 void setConstParamMatch(bool B) { 654 Pair.setInt(B << 1 | unsigned(hasSuccess())); 655 } 656 }; 657 658 /// \brief A cache of special member function overload resolution results 659 /// for C++ records. 660 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 661 662 /// \brief The kind of translation unit we are processing. 663 /// 664 /// When we're processing a complete translation unit, Sema will perform 665 /// end-of-translation-unit semantic tasks (such as creating 666 /// initializers for tentative definitions in C) once parsing has 667 /// completed. Modules and precompiled headers perform different kinds of 668 /// checks. 669 TranslationUnitKind TUKind; 670 671 llvm::BumpPtrAllocator BumpAlloc; 672 673 /// \brief The number of SFINAE diagnostics that have been trapped. 674 unsigned NumSFINAEErrors; 675 676 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 677 UnparsedDefaultArgInstantiationsMap; 678 679 /// \brief A mapping from parameters with unparsed default arguments to the 680 /// set of instantiations of each parameter. 681 /// 682 /// This mapping is a temporary data structure used when parsing 683 /// nested class templates or nested classes of class templates, 684 /// where we might end up instantiating an inner class before the 685 /// default arguments of its methods have been parsed. 686 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 687 688 // Contains the locations of the beginning of unparsed default 689 // argument locations. 690 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 691 692 /// UndefinedInternals - all the used, undefined objects with 693 /// internal linkage in this translation unit. 694 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 695 696 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 697 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 698 699 /// Method Pool - allows efficient lookup when typechecking messages to "id". 700 /// We need to maintain a list, since selectors can have differing signatures 701 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 702 /// of selectors are "overloaded"). 703 GlobalMethodPool MethodPool; 704 705 /// Method selectors used in a @selector expression. Used for implementation 706 /// of -Wselector. 707 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 708 709 void ReadMethodPool(Selector Sel); 710 711 /// Private Helper predicate to check for 'self'. 712 bool isSelfExpr(Expr *RExpr); 713public: 714 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 715 TranslationUnitKind TUKind = TU_Complete, 716 CodeCompleteConsumer *CompletionConsumer = 0); 717 ~Sema(); 718 719 /// \brief Perform initialization that occurs after the parser has been 720 /// initialized but before it parses anything. 721 void Initialize(); 722 723 const LangOptions &getLangOptions() const { return LangOpts; } 724 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 725 FPOptions &getFPOptions() { return FPFeatures; } 726 727 DiagnosticsEngine &getDiagnostics() const { return Diags; } 728 SourceManager &getSourceManager() const { return SourceMgr; } 729 const TargetAttributesSema &getTargetAttributesSema() const; 730 Preprocessor &getPreprocessor() const { return PP; } 731 ASTContext &getASTContext() const { return Context; } 732 ASTConsumer &getASTConsumer() const { return Consumer; } 733 ASTMutationListener *getASTMutationListener() const; 734 735 void PrintStats() const; 736 737 /// \brief Helper class that creates diagnostics with optional 738 /// template instantiation stacks. 739 /// 740 /// This class provides a wrapper around the basic DiagnosticBuilder 741 /// class that emits diagnostics. SemaDiagnosticBuilder is 742 /// responsible for emitting the diagnostic (as DiagnosticBuilder 743 /// does) and, if the diagnostic comes from inside a template 744 /// instantiation, printing the template instantiation stack as 745 /// well. 746 class SemaDiagnosticBuilder : public DiagnosticBuilder { 747 Sema &SemaRef; 748 unsigned DiagID; 749 750 public: 751 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 752 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 753 754 explicit SemaDiagnosticBuilder(Sema &SemaRef) 755 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 756 757 ~SemaDiagnosticBuilder(); 758 }; 759 760 /// \brief Emit a diagnostic. 761 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 762 763 /// \brief Emit a partial diagnostic. 764 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 765 766 /// \brief Build a partial diagnostic. 767 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 768 769 bool findMacroSpelling(SourceLocation &loc, StringRef name); 770 771 /// \brief Get a string to suggest for zero-initialization of a type. 772 const char *getFixItZeroInitializerForType(QualType T) const; 773 774 ExprResult Owned(Expr* E) { return E; } 775 ExprResult Owned(ExprResult R) { return R; } 776 StmtResult Owned(Stmt* S) { return S; } 777 778 void ActOnEndOfTranslationUnit(); 779 780 void CheckDelegatingCtorCycles(); 781 782 Scope *getScopeForContext(DeclContext *Ctx); 783 784 void PushFunctionScope(); 785 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 786 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 787 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 788 const Decl *D = 0, const BlockExpr *blkExpr = 0); 789 790 sema::FunctionScopeInfo *getCurFunction() const { 791 return FunctionScopes.back(); 792 } 793 794 void PushCompoundScope(); 795 void PopCompoundScope(); 796 797 sema::CompoundScopeInfo &getCurCompoundScope() const; 798 799 bool hasAnyUnrecoverableErrorsInThisFunction() const; 800 801 /// \brief Retrieve the current block, if any. 802 sema::BlockScopeInfo *getCurBlock(); 803 804 /// \brief Retrieve the current lambda expression, if any. 805 sema::LambdaScopeInfo *getCurLambda(); 806 807 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 808 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 809 810 //===--------------------------------------------------------------------===// 811 // Type Analysis / Processing: SemaType.cpp. 812 // 813 814 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 815 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 816 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 817 } 818 QualType BuildPointerType(QualType T, 819 SourceLocation Loc, DeclarationName Entity); 820 QualType BuildReferenceType(QualType T, bool LValueRef, 821 SourceLocation Loc, DeclarationName Entity); 822 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 823 Expr *ArraySize, unsigned Quals, 824 SourceRange Brackets, DeclarationName Entity); 825 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 826 SourceLocation AttrLoc); 827 QualType BuildFunctionType(QualType T, 828 QualType *ParamTypes, unsigned NumParamTypes, 829 bool Variadic, bool HasTrailingReturn, 830 unsigned Quals, RefQualifierKind RefQualifier, 831 SourceLocation Loc, DeclarationName Entity, 832 FunctionType::ExtInfo Info); 833 QualType BuildMemberPointerType(QualType T, QualType Class, 834 SourceLocation Loc, 835 DeclarationName Entity); 836 QualType BuildBlockPointerType(QualType T, 837 SourceLocation Loc, DeclarationName Entity); 838 QualType BuildParenType(QualType T); 839 QualType BuildAtomicType(QualType T, SourceLocation Loc); 840 841 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 842 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 843 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 844 TypeSourceInfo *ReturnTypeInfo); 845 /// \brief Package the given type and TSI into a ParsedType. 846 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 847 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 848 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 849 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 850 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 851 bool CheckDistantExceptionSpec(QualType T); 852 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 853 bool CheckEquivalentExceptionSpec( 854 const FunctionProtoType *Old, SourceLocation OldLoc, 855 const FunctionProtoType *New, SourceLocation NewLoc); 856 bool CheckEquivalentExceptionSpec( 857 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 858 const FunctionProtoType *Old, SourceLocation OldLoc, 859 const FunctionProtoType *New, SourceLocation NewLoc, 860 bool *MissingExceptionSpecification = 0, 861 bool *MissingEmptyExceptionSpecification = 0, 862 bool AllowNoexceptAllMatchWithNoSpec = false, 863 bool IsOperatorNew = false); 864 bool CheckExceptionSpecSubset( 865 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 866 const FunctionProtoType *Superset, SourceLocation SuperLoc, 867 const FunctionProtoType *Subset, SourceLocation SubLoc); 868 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 869 const FunctionProtoType *Target, SourceLocation TargetLoc, 870 const FunctionProtoType *Source, SourceLocation SourceLoc); 871 872 TypeResult ActOnTypeName(Scope *S, Declarator &D); 873 874 /// \brief The parser has parsed the context-sensitive type 'instancetype' 875 /// in an Objective-C message declaration. Return the appropriate type. 876 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 877 878 bool RequireCompleteType(SourceLocation Loc, QualType T, 879 const PartialDiagnostic &PD, 880 std::pair<SourceLocation, PartialDiagnostic> Note); 881 bool RequireCompleteType(SourceLocation Loc, QualType T, 882 const PartialDiagnostic &PD); 883 bool RequireCompleteType(SourceLocation Loc, QualType T, 884 unsigned DiagID); 885 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 886 std::pair<SourceLocation, 887 PartialDiagnostic> Note); 888 889 bool RequireLiteralType(SourceLocation Loc, QualType T, 890 const PartialDiagnostic &PD); 891 892 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 893 const CXXScopeSpec &SS, QualType T); 894 895 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 896 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 897 QualType BuildUnaryTransformType(QualType BaseType, 898 UnaryTransformType::UTTKind UKind, 899 SourceLocation Loc); 900 901 //===--------------------------------------------------------------------===// 902 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 903 // 904 905 /// List of decls defined in a function prototype. This contains EnumConstants 906 /// that incorrectly end up in translation unit scope because there is no 907 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 908 /// them into the FunctionDecl. 909 std::vector<NamedDecl*> DeclsInPrototypeScope; 910 /// Nonzero if we are currently parsing a function declarator. This is a counter 911 /// as opposed to a boolean so we can deal with nested function declarators 912 /// such as: 913 /// void f(void (*g)(), ...) 914 unsigned InFunctionDeclarator; 915 916 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 917 918 void DiagnoseUseOfUnimplementedSelectors(); 919 920 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 921 Scope *S, CXXScopeSpec *SS = 0, 922 bool isClassName = false, 923 bool HasTrailingDot = false, 924 ParsedType ObjectType = ParsedType(), 925 bool IsCtorOrDtorName = false, 926 bool WantNontrivialTypeSourceInfo = false, 927 IdentifierInfo **CorrectedII = 0); 928 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 929 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 930 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 931 SourceLocation IILoc, 932 Scope *S, 933 CXXScopeSpec *SS, 934 ParsedType &SuggestedType); 935 936 /// \brief Describes the result of the name lookup and resolution performed 937 /// by \c ClassifyName(). 938 enum NameClassificationKind { 939 NC_Unknown, 940 NC_Error, 941 NC_Keyword, 942 NC_Type, 943 NC_Expression, 944 NC_NestedNameSpecifier, 945 NC_TypeTemplate, 946 NC_FunctionTemplate 947 }; 948 949 class NameClassification { 950 NameClassificationKind Kind; 951 ExprResult Expr; 952 TemplateName Template; 953 ParsedType Type; 954 const IdentifierInfo *Keyword; 955 956 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 957 958 public: 959 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 960 961 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 962 963 NameClassification(const IdentifierInfo *Keyword) 964 : Kind(NC_Keyword), Keyword(Keyword) { } 965 966 static NameClassification Error() { 967 return NameClassification(NC_Error); 968 } 969 970 static NameClassification Unknown() { 971 return NameClassification(NC_Unknown); 972 } 973 974 static NameClassification NestedNameSpecifier() { 975 return NameClassification(NC_NestedNameSpecifier); 976 } 977 978 static NameClassification TypeTemplate(TemplateName Name) { 979 NameClassification Result(NC_TypeTemplate); 980 Result.Template = Name; 981 return Result; 982 } 983 984 static NameClassification FunctionTemplate(TemplateName Name) { 985 NameClassification Result(NC_FunctionTemplate); 986 Result.Template = Name; 987 return Result; 988 } 989 990 NameClassificationKind getKind() const { return Kind; } 991 992 ParsedType getType() const { 993 assert(Kind == NC_Type); 994 return Type; 995 } 996 997 ExprResult getExpression() const { 998 assert(Kind == NC_Expression); 999 return Expr; 1000 } 1001 1002 TemplateName getTemplateName() const { 1003 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1004 return Template; 1005 } 1006 1007 TemplateNameKind getTemplateNameKind() const { 1008 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1009 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1010 } 1011}; 1012 1013 /// \brief Perform name lookup on the given name, classifying it based on 1014 /// the results of name lookup and the following token. 1015 /// 1016 /// This routine is used by the parser to resolve identifiers and help direct 1017 /// parsing. When the identifier cannot be found, this routine will attempt 1018 /// to correct the typo and classify based on the resulting name. 1019 /// 1020 /// \param S The scope in which we're performing name lookup. 1021 /// 1022 /// \param SS The nested-name-specifier that precedes the name. 1023 /// 1024 /// \param Name The identifier. If typo correction finds an alternative name, 1025 /// this pointer parameter will be updated accordingly. 1026 /// 1027 /// \param NameLoc The location of the identifier. 1028 /// 1029 /// \param NextToken The token following the identifier. Used to help 1030 /// disambiguate the name. 1031 NameClassification ClassifyName(Scope *S, 1032 CXXScopeSpec &SS, 1033 IdentifierInfo *&Name, 1034 SourceLocation NameLoc, 1035 const Token &NextToken); 1036 1037 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1038 1039 Decl *HandleDeclarator(Scope *S, Declarator &D, 1040 MultiTemplateParamsArg TemplateParameterLists); 1041 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1042 const LookupResult &Previous, 1043 Scope *S); 1044 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1045 void DiagnoseFunctionSpecifiers(Declarator& D); 1046 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1047 void CheckShadow(Scope *S, VarDecl *D); 1048 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1049 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1050 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1051 TypeSourceInfo *TInfo, 1052 LookupResult &Previous); 1053 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1054 LookupResult &Previous, bool &Redeclaration); 1055 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1056 TypeSourceInfo *TInfo, 1057 LookupResult &Previous, 1058 MultiTemplateParamsArg TemplateParamLists); 1059 // Returns true if the variable declaration is a redeclaration 1060 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1061 void CheckCompleteVariableDeclaration(VarDecl *var); 1062 void ActOnStartFunctionDeclarator(); 1063 void ActOnEndFunctionDeclarator(); 1064 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1065 TypeSourceInfo *TInfo, 1066 LookupResult &Previous, 1067 MultiTemplateParamsArg TemplateParamLists, 1068 bool &AddToScope); 1069 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1070 1071 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1072 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1073 1074 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1075 // Returns true if the function declaration is a redeclaration 1076 bool CheckFunctionDeclaration(Scope *S, 1077 FunctionDecl *NewFD, LookupResult &Previous, 1078 bool IsExplicitSpecialization); 1079 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1080 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1081 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1082 SourceLocation Loc, 1083 QualType T); 1084 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1085 SourceLocation NameLoc, IdentifierInfo *Name, 1086 QualType T, TypeSourceInfo *TSInfo, 1087 StorageClass SC, StorageClass SCAsWritten); 1088 void ActOnParamDefaultArgument(Decl *param, 1089 SourceLocation EqualLoc, 1090 Expr *defarg); 1091 void ActOnParamUnparsedDefaultArgument(Decl *param, 1092 SourceLocation EqualLoc, 1093 SourceLocation ArgLoc); 1094 void ActOnParamDefaultArgumentError(Decl *param); 1095 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1096 SourceLocation EqualLoc); 1097 1098 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1099 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1100 bool TypeMayContainAuto); 1101 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1102 void ActOnInitializerError(Decl *Dcl); 1103 void ActOnCXXForRangeDecl(Decl *D); 1104 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1105 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1106 void FinalizeDeclaration(Decl *D); 1107 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1108 Decl **Group, 1109 unsigned NumDecls); 1110 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1111 bool TypeMayContainAuto = true); 1112 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1113 SourceLocation LocAfterDecls); 1114 void CheckForFunctionRedefinition(FunctionDecl *FD); 1115 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1116 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1117 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1118 1119 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1120 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1121 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1122 1123 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1124 /// attribute for which parsing is delayed. 1125 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1126 1127 /// \brief Diagnose any unused parameters in the given sequence of 1128 /// ParmVarDecl pointers. 1129 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1130 ParmVarDecl * const *End); 1131 1132 /// \brief Diagnose whether the size of parameters or return value of a 1133 /// function or obj-c method definition is pass-by-value and larger than a 1134 /// specified threshold. 1135 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1136 ParmVarDecl * const *End, 1137 QualType ReturnTy, 1138 NamedDecl *D); 1139 1140 void DiagnoseInvalidJumps(Stmt *Body); 1141 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1142 SourceLocation AsmLoc, 1143 SourceLocation RParenLoc); 1144 1145 /// \brief The parser has processed a module import declaration. 1146 /// 1147 /// \param AtLoc The location of the '@' symbol, if any. 1148 /// 1149 /// \param ImportLoc The location of the 'import' keyword. 1150 /// 1151 /// \param Path The module access path. 1152 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1153 ModuleIdPath Path); 1154 1155 /// \brief Retrieve a suitable printing policy. 1156 PrintingPolicy getPrintingPolicy() const { 1157 return getPrintingPolicy(Context, PP); 1158 } 1159 1160 /// \brief Retrieve a suitable printing policy. 1161 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1162 const Preprocessor &PP); 1163 1164 /// Scope actions. 1165 void ActOnPopScope(SourceLocation Loc, Scope *S); 1166 void ActOnTranslationUnitScope(Scope *S); 1167 1168 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1169 DeclSpec &DS); 1170 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1171 DeclSpec &DS, 1172 MultiTemplateParamsArg TemplateParams); 1173 1174 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1175 AccessSpecifier AS, 1176 RecordDecl *Record); 1177 1178 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1179 RecordDecl *Record); 1180 1181 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1182 TagTypeKind NewTag, bool isDefinition, 1183 SourceLocation NewTagLoc, 1184 const IdentifierInfo &Name); 1185 1186 enum TagUseKind { 1187 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1188 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1189 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1190 TUK_Friend // Friend declaration: 'friend struct foo;' 1191 }; 1192 1193 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1194 SourceLocation KWLoc, CXXScopeSpec &SS, 1195 IdentifierInfo *Name, SourceLocation NameLoc, 1196 AttributeList *Attr, AccessSpecifier AS, 1197 SourceLocation ModulePrivateLoc, 1198 MultiTemplateParamsArg TemplateParameterLists, 1199 bool &OwnedDecl, bool &IsDependent, 1200 SourceLocation ScopedEnumKWLoc, 1201 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1202 1203 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1204 unsigned TagSpec, SourceLocation TagLoc, 1205 CXXScopeSpec &SS, 1206 IdentifierInfo *Name, SourceLocation NameLoc, 1207 AttributeList *Attr, 1208 MultiTemplateParamsArg TempParamLists); 1209 1210 TypeResult ActOnDependentTag(Scope *S, 1211 unsigned TagSpec, 1212 TagUseKind TUK, 1213 const CXXScopeSpec &SS, 1214 IdentifierInfo *Name, 1215 SourceLocation TagLoc, 1216 SourceLocation NameLoc); 1217 1218 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1219 IdentifierInfo *ClassName, 1220 SmallVectorImpl<Decl *> &Decls); 1221 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1222 Declarator &D, Expr *BitfieldWidth); 1223 1224 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1225 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1226 AccessSpecifier AS); 1227 1228 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1229 TypeSourceInfo *TInfo, 1230 RecordDecl *Record, SourceLocation Loc, 1231 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1232 SourceLocation TSSL, 1233 AccessSpecifier AS, NamedDecl *PrevDecl, 1234 Declarator *D = 0); 1235 1236 enum CXXSpecialMember { 1237 CXXDefaultConstructor, 1238 CXXCopyConstructor, 1239 CXXMoveConstructor, 1240 CXXCopyAssignment, 1241 CXXMoveAssignment, 1242 CXXDestructor, 1243 CXXInvalid 1244 }; 1245 bool CheckNontrivialField(FieldDecl *FD); 1246 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1247 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1248 void ActOnLastBitfield(SourceLocation DeclStart, 1249 SmallVectorImpl<Decl *> &AllIvarDecls); 1250 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1251 Declarator &D, Expr *BitfieldWidth, 1252 tok::ObjCKeywordKind visibility); 1253 1254 // This is used for both record definitions and ObjC interface declarations. 1255 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1256 llvm::ArrayRef<Decl *> Fields, 1257 SourceLocation LBrac, SourceLocation RBrac, 1258 AttributeList *AttrList); 1259 1260 /// ActOnTagStartDefinition - Invoked when we have entered the 1261 /// scope of a tag's definition (e.g., for an enumeration, class, 1262 /// struct, or union). 1263 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1264 1265 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1266 1267 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1268 /// C++ record definition's base-specifiers clause and are starting its 1269 /// member declarations. 1270 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1271 SourceLocation FinalLoc, 1272 SourceLocation LBraceLoc); 1273 1274 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1275 /// the definition of a tag (enumeration, class, struct, or union). 1276 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1277 SourceLocation RBraceLoc); 1278 1279 void ActOnObjCContainerFinishDefinition(); 1280 1281 /// \brief Invoked when we must temporarily exit the objective-c container 1282 /// scope for parsing/looking-up C constructs. 1283 /// 1284 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1285 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1286 void ActOnObjCReenterContainerContext(DeclContext *DC); 1287 1288 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1289 /// error parsing the definition of a tag. 1290 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1291 1292 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1293 EnumConstantDecl *LastEnumConst, 1294 SourceLocation IdLoc, 1295 IdentifierInfo *Id, 1296 Expr *val); 1297 1298 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1299 SourceLocation IdLoc, IdentifierInfo *Id, 1300 AttributeList *Attrs, 1301 SourceLocation EqualLoc, Expr *Val); 1302 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1303 SourceLocation RBraceLoc, Decl *EnumDecl, 1304 Decl **Elements, unsigned NumElements, 1305 Scope *S, AttributeList *Attr); 1306 1307 DeclContext *getContainingDC(DeclContext *DC); 1308 1309 /// Set the current declaration context until it gets popped. 1310 void PushDeclContext(Scope *S, DeclContext *DC); 1311 void PopDeclContext(); 1312 1313 /// EnterDeclaratorContext - Used when we must lookup names in the context 1314 /// of a declarator's nested name specifier. 1315 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1316 void ExitDeclaratorContext(Scope *S); 1317 1318 /// Push the parameters of D, which must be a function, into scope. 1319 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1320 void ActOnExitFunctionContext() { PopDeclContext(); } 1321 1322 DeclContext *getFunctionLevelDeclContext(); 1323 1324 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1325 /// to the function decl for the function being parsed. If we're currently 1326 /// in a 'block', this returns the containing context. 1327 FunctionDecl *getCurFunctionDecl(); 1328 1329 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1330 /// the method decl for the method being parsed. If we're currently 1331 /// in a 'block', this returns the containing context. 1332 ObjCMethodDecl *getCurMethodDecl(); 1333 1334 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1335 /// or C function we're in, otherwise return null. If we're currently 1336 /// in a 'block', this returns the containing context. 1337 NamedDecl *getCurFunctionOrMethodDecl(); 1338 1339 /// Add this decl to the scope shadowed decl chains. 1340 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1341 1342 /// \brief Make the given externally-produced declaration visible at the 1343 /// top level scope. 1344 /// 1345 /// \param D The externally-produced declaration to push. 1346 /// 1347 /// \param Name The name of the externally-produced declaration. 1348 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1349 1350 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1351 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1352 /// true if 'D' belongs to the given declaration context. 1353 /// 1354 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1355 /// whether the declaration is in scope for the purposes of explicit template 1356 /// instantiation or specialization. The default is false. 1357 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1358 bool ExplicitInstantiationOrSpecialization = false); 1359 1360 /// Finds the scope corresponding to the given decl context, if it 1361 /// happens to be an enclosing scope. Otherwise return NULL. 1362 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1363 1364 /// Subroutines of ActOnDeclarator(). 1365 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1366 TypeSourceInfo *TInfo); 1367 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1368 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1369 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1370 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1371 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1372 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1373 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1374 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1375 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1376 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1377 1378 // AssignmentAction - This is used by all the assignment diagnostic functions 1379 // to represent what is actually causing the operation 1380 enum AssignmentAction { 1381 AA_Assigning, 1382 AA_Passing, 1383 AA_Returning, 1384 AA_Converting, 1385 AA_Initializing, 1386 AA_Sending, 1387 AA_Casting 1388 }; 1389 1390 /// C++ Overloading. 1391 enum OverloadKind { 1392 /// This is a legitimate overload: the existing declarations are 1393 /// functions or function templates with different signatures. 1394 Ovl_Overload, 1395 1396 /// This is not an overload because the signature exactly matches 1397 /// an existing declaration. 1398 Ovl_Match, 1399 1400 /// This is not an overload because the lookup results contain a 1401 /// non-function. 1402 Ovl_NonFunction 1403 }; 1404 OverloadKind CheckOverload(Scope *S, 1405 FunctionDecl *New, 1406 const LookupResult &OldDecls, 1407 NamedDecl *&OldDecl, 1408 bool IsForUsingDecl); 1409 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1410 1411 /// \brief Checks availability of the function depending on the current 1412 /// function context.Inside an unavailable function,unavailability is ignored. 1413 /// 1414 /// \returns true if \arg FD is unavailable and current context is inside 1415 /// an available function, false otherwise. 1416 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1417 1418 ImplicitConversionSequence 1419 TryImplicitConversion(Expr *From, QualType ToType, 1420 bool SuppressUserConversions, 1421 bool AllowExplicit, 1422 bool InOverloadResolution, 1423 bool CStyle, 1424 bool AllowObjCWritebackConversion); 1425 1426 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1427 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1428 bool IsComplexPromotion(QualType FromType, QualType ToType); 1429 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1430 bool InOverloadResolution, 1431 QualType& ConvertedType, bool &IncompatibleObjC); 1432 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1433 QualType& ConvertedType, bool &IncompatibleObjC); 1434 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1435 QualType &ConvertedType); 1436 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1437 QualType& ConvertedType); 1438 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1439 const FunctionProtoType *NewType, 1440 unsigned *ArgPos = 0); 1441 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1442 QualType FromType, QualType ToType); 1443 1444 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1445 bool CheckPointerConversion(Expr *From, QualType ToType, 1446 CastKind &Kind, 1447 CXXCastPath& BasePath, 1448 bool IgnoreBaseAccess); 1449 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1450 bool InOverloadResolution, 1451 QualType &ConvertedType); 1452 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1453 CastKind &Kind, 1454 CXXCastPath &BasePath, 1455 bool IgnoreBaseAccess); 1456 bool IsQualificationConversion(QualType FromType, QualType ToType, 1457 bool CStyle, bool &ObjCLifetimeConversion); 1458 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1459 QualType &ResultTy); 1460 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1461 1462 1463 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1464 const VarDecl *NRVOCandidate, 1465 QualType ResultType, 1466 Expr *Value, 1467 bool AllowNRVO = true); 1468 1469 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1470 ExprResult Init); 1471 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1472 SourceLocation EqualLoc, 1473 ExprResult Init, 1474 bool TopLevelOfInitList = false, 1475 bool AllowExplicit = false); 1476 ExprResult PerformObjectArgumentInitialization(Expr *From, 1477 NestedNameSpecifier *Qualifier, 1478 NamedDecl *FoundDecl, 1479 CXXMethodDecl *Method); 1480 1481 ExprResult PerformContextuallyConvertToBool(Expr *From); 1482 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1483 1484 /// Contexts in which a converted constant expression is required. 1485 enum CCEKind { 1486 CCEK_CaseValue, ///< Expression in a case label. 1487 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1488 CCEK_TemplateArg ///< Value of a non-type template parameter. 1489 }; 1490 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1491 llvm::APSInt &Value, CCEKind CCE); 1492 1493 ExprResult 1494 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1495 const PartialDiagnostic &NotIntDiag, 1496 const PartialDiagnostic &IncompleteDiag, 1497 const PartialDiagnostic &ExplicitConvDiag, 1498 const PartialDiagnostic &ExplicitConvNote, 1499 const PartialDiagnostic &AmbigDiag, 1500 const PartialDiagnostic &AmbigNote, 1501 const PartialDiagnostic &ConvDiag, 1502 bool AllowScopedEnumerations); 1503 1504 ExprResult PerformObjectMemberConversion(Expr *From, 1505 NestedNameSpecifier *Qualifier, 1506 NamedDecl *FoundDecl, 1507 NamedDecl *Member); 1508 1509 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1510 // TODO: make this is a typesafe union. 1511 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1512 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1513 1514 void AddOverloadCandidate(FunctionDecl *Function, 1515 DeclAccessPair FoundDecl, 1516 llvm::ArrayRef<Expr *> Args, 1517 OverloadCandidateSet& CandidateSet, 1518 bool SuppressUserConversions = false, 1519 bool PartialOverloading = false, 1520 bool AllowExplicit = false); 1521 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1522 llvm::ArrayRef<Expr *> Args, 1523 OverloadCandidateSet& CandidateSet, 1524 bool SuppressUserConversions = false); 1525 void AddMethodCandidate(DeclAccessPair FoundDecl, 1526 QualType ObjectType, 1527 Expr::Classification ObjectClassification, 1528 Expr **Args, unsigned NumArgs, 1529 OverloadCandidateSet& CandidateSet, 1530 bool SuppressUserConversion = false); 1531 void AddMethodCandidate(CXXMethodDecl *Method, 1532 DeclAccessPair FoundDecl, 1533 CXXRecordDecl *ActingContext, QualType ObjectType, 1534 Expr::Classification ObjectClassification, 1535 llvm::ArrayRef<Expr *> Args, 1536 OverloadCandidateSet& CandidateSet, 1537 bool SuppressUserConversions = false); 1538 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1539 DeclAccessPair FoundDecl, 1540 CXXRecordDecl *ActingContext, 1541 TemplateArgumentListInfo *ExplicitTemplateArgs, 1542 QualType ObjectType, 1543 Expr::Classification ObjectClassification, 1544 llvm::ArrayRef<Expr *> Args, 1545 OverloadCandidateSet& CandidateSet, 1546 bool SuppressUserConversions = false); 1547 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1548 DeclAccessPair FoundDecl, 1549 TemplateArgumentListInfo *ExplicitTemplateArgs, 1550 llvm::ArrayRef<Expr *> Args, 1551 OverloadCandidateSet& CandidateSet, 1552 bool SuppressUserConversions = false); 1553 void AddConversionCandidate(CXXConversionDecl *Conversion, 1554 DeclAccessPair FoundDecl, 1555 CXXRecordDecl *ActingContext, 1556 Expr *From, QualType ToType, 1557 OverloadCandidateSet& CandidateSet); 1558 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1559 DeclAccessPair FoundDecl, 1560 CXXRecordDecl *ActingContext, 1561 Expr *From, QualType ToType, 1562 OverloadCandidateSet &CandidateSet); 1563 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1564 DeclAccessPair FoundDecl, 1565 CXXRecordDecl *ActingContext, 1566 const FunctionProtoType *Proto, 1567 Expr *Object, llvm::ArrayRef<Expr*> Args, 1568 OverloadCandidateSet& CandidateSet); 1569 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1570 SourceLocation OpLoc, 1571 Expr **Args, unsigned NumArgs, 1572 OverloadCandidateSet& CandidateSet, 1573 SourceRange OpRange = SourceRange()); 1574 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1575 Expr **Args, unsigned NumArgs, 1576 OverloadCandidateSet& CandidateSet, 1577 bool IsAssignmentOperator = false, 1578 unsigned NumContextualBoolArguments = 0); 1579 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1580 SourceLocation OpLoc, 1581 Expr **Args, unsigned NumArgs, 1582 OverloadCandidateSet& CandidateSet); 1583 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1584 bool Operator, SourceLocation Loc, 1585 llvm::ArrayRef<Expr *> Args, 1586 TemplateArgumentListInfo *ExplicitTemplateArgs, 1587 OverloadCandidateSet& CandidateSet, 1588 bool PartialOverloading = false, 1589 bool StdNamespaceIsAssociated = false); 1590 1591 // Emit as a 'note' the specific overload candidate 1592 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1593 1594 // Emit as a series of 'note's all template and non-templates 1595 // identified by the expression Expr 1596 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1597 1598 // [PossiblyAFunctionType] --> [Return] 1599 // NonFunctionType --> NonFunctionType 1600 // R (A) --> R(A) 1601 // R (*)(A) --> R (A) 1602 // R (&)(A) --> R (A) 1603 // R (S::*)(A) --> R (A) 1604 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1605 1606 FunctionDecl * 1607 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1608 QualType TargetType, 1609 bool Complain, 1610 DeclAccessPair &Found, 1611 bool *pHadMultipleCandidates = 0); 1612 1613 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1614 bool Complain = false, 1615 DeclAccessPair* Found = 0); 1616 1617 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1618 ExprResult &SrcExpr, 1619 bool DoFunctionPointerConverion = false, 1620 bool Complain = false, 1621 const SourceRange& OpRangeForComplaining = SourceRange(), 1622 QualType DestTypeForComplaining = QualType(), 1623 unsigned DiagIDForComplaining = 0); 1624 1625 1626 Expr *FixOverloadedFunctionReference(Expr *E, 1627 DeclAccessPair FoundDecl, 1628 FunctionDecl *Fn); 1629 ExprResult FixOverloadedFunctionReference(ExprResult, 1630 DeclAccessPair FoundDecl, 1631 FunctionDecl *Fn); 1632 1633 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1634 llvm::ArrayRef<Expr *> Args, 1635 OverloadCandidateSet &CandidateSet, 1636 bool PartialOverloading = false); 1637 1638 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1639 UnresolvedLookupExpr *ULE, 1640 SourceLocation LParenLoc, 1641 Expr **Args, unsigned NumArgs, 1642 SourceLocation RParenLoc, 1643 Expr *ExecConfig, 1644 bool AllowTypoCorrection=true); 1645 1646 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1647 unsigned Opc, 1648 const UnresolvedSetImpl &Fns, 1649 Expr *input); 1650 1651 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1652 unsigned Opc, 1653 const UnresolvedSetImpl &Fns, 1654 Expr *LHS, Expr *RHS); 1655 1656 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1657 SourceLocation RLoc, 1658 Expr *Base,Expr *Idx); 1659 1660 ExprResult 1661 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1662 SourceLocation LParenLoc, Expr **Args, 1663 unsigned NumArgs, SourceLocation RParenLoc); 1664 ExprResult 1665 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1666 Expr **Args, unsigned NumArgs, 1667 SourceLocation RParenLoc); 1668 1669 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1670 SourceLocation OpLoc); 1671 1672 /// CheckCallReturnType - Checks that a call expression's return type is 1673 /// complete. Returns true on failure. The location passed in is the location 1674 /// that best represents the call. 1675 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1676 CallExpr *CE, FunctionDecl *FD); 1677 1678 /// Helpers for dealing with blocks and functions. 1679 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1680 bool CheckParameterNames); 1681 void CheckCXXDefaultArguments(FunctionDecl *FD); 1682 void CheckExtraCXXDefaultArguments(Declarator &D); 1683 Scope *getNonFieldDeclScope(Scope *S); 1684 1685 /// \name Name lookup 1686 /// 1687 /// These routines provide name lookup that is used during semantic 1688 /// analysis to resolve the various kinds of names (identifiers, 1689 /// overloaded operator names, constructor names, etc.) into zero or 1690 /// more declarations within a particular scope. The major entry 1691 /// points are LookupName, which performs unqualified name lookup, 1692 /// and LookupQualifiedName, which performs qualified name lookup. 1693 /// 1694 /// All name lookup is performed based on some specific criteria, 1695 /// which specify what names will be visible to name lookup and how 1696 /// far name lookup should work. These criteria are important both 1697 /// for capturing language semantics (certain lookups will ignore 1698 /// certain names, for example) and for performance, since name 1699 /// lookup is often a bottleneck in the compilation of C++. Name 1700 /// lookup criteria is specified via the LookupCriteria enumeration. 1701 /// 1702 /// The results of name lookup can vary based on the kind of name 1703 /// lookup performed, the current language, and the translation 1704 /// unit. In C, for example, name lookup will either return nothing 1705 /// (no entity found) or a single declaration. In C++, name lookup 1706 /// can additionally refer to a set of overloaded functions or 1707 /// result in an ambiguity. All of the possible results of name 1708 /// lookup are captured by the LookupResult class, which provides 1709 /// the ability to distinguish among them. 1710 //@{ 1711 1712 /// @brief Describes the kind of name lookup to perform. 1713 enum LookupNameKind { 1714 /// Ordinary name lookup, which finds ordinary names (functions, 1715 /// variables, typedefs, etc.) in C and most kinds of names 1716 /// (functions, variables, members, types, etc.) in C++. 1717 LookupOrdinaryName = 0, 1718 /// Tag name lookup, which finds the names of enums, classes, 1719 /// structs, and unions. 1720 LookupTagName, 1721 /// Label name lookup. 1722 LookupLabel, 1723 /// Member name lookup, which finds the names of 1724 /// class/struct/union members. 1725 LookupMemberName, 1726 /// Look up of an operator name (e.g., operator+) for use with 1727 /// operator overloading. This lookup is similar to ordinary name 1728 /// lookup, but will ignore any declarations that are class members. 1729 LookupOperatorName, 1730 /// Look up of a name that precedes the '::' scope resolution 1731 /// operator in C++. This lookup completely ignores operator, object, 1732 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1733 LookupNestedNameSpecifierName, 1734 /// Look up a namespace name within a C++ using directive or 1735 /// namespace alias definition, ignoring non-namespace names (C++ 1736 /// [basic.lookup.udir]p1). 1737 LookupNamespaceName, 1738 /// Look up all declarations in a scope with the given name, 1739 /// including resolved using declarations. This is appropriate 1740 /// for checking redeclarations for a using declaration. 1741 LookupUsingDeclName, 1742 /// Look up an ordinary name that is going to be redeclared as a 1743 /// name with linkage. This lookup ignores any declarations that 1744 /// are outside of the current scope unless they have linkage. See 1745 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1746 LookupRedeclarationWithLinkage, 1747 /// Look up the name of an Objective-C protocol. 1748 LookupObjCProtocolName, 1749 /// Look up implicit 'self' parameter of an objective-c method. 1750 LookupObjCImplicitSelfParam, 1751 /// \brief Look up any declaration with any name. 1752 LookupAnyName 1753 }; 1754 1755 /// \brief Specifies whether (or how) name lookup is being performed for a 1756 /// redeclaration (vs. a reference). 1757 enum RedeclarationKind { 1758 /// \brief The lookup is a reference to this name that is not for the 1759 /// purpose of redeclaring the name. 1760 NotForRedeclaration = 0, 1761 /// \brief The lookup results will be used for redeclaration of a name, 1762 /// if an entity by that name already exists. 1763 ForRedeclaration 1764 }; 1765 1766 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1767 CXXSpecialMember SM, 1768 bool ConstArg, 1769 bool VolatileArg, 1770 bool RValueThis, 1771 bool ConstThis, 1772 bool VolatileThis); 1773 1774private: 1775 bool CppLookupName(LookupResult &R, Scope *S); 1776 1777 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1778 // 1779 // The boolean value will be true to indicate that the namespace was loaded 1780 // from an AST/PCH file, or false otherwise. 1781 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1782 1783 /// \brief Whether we have already loaded known namespaces from an extenal 1784 /// source. 1785 bool LoadedExternalKnownNamespaces; 1786 1787public: 1788 /// \brief Look up a name, looking for a single declaration. Return 1789 /// null if the results were absent, ambiguous, or overloaded. 1790 /// 1791 /// It is preferable to use the elaborated form and explicitly handle 1792 /// ambiguity and overloaded. 1793 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1794 SourceLocation Loc, 1795 LookupNameKind NameKind, 1796 RedeclarationKind Redecl 1797 = NotForRedeclaration); 1798 bool LookupName(LookupResult &R, Scope *S, 1799 bool AllowBuiltinCreation = false); 1800 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1801 bool InUnqualifiedLookup = false); 1802 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1803 bool AllowBuiltinCreation = false, 1804 bool EnteringContext = false); 1805 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1806 RedeclarationKind Redecl 1807 = NotForRedeclaration); 1808 1809 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1810 QualType T1, QualType T2, 1811 UnresolvedSetImpl &Functions); 1812 1813 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1814 SourceLocation GnuLabelLoc = SourceLocation()); 1815 1816 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1817 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1818 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1819 unsigned Quals, 1820 bool *ConstParam = 0); 1821 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1822 bool RValueThis, unsigned ThisQuals, 1823 bool *ConstParam = 0); 1824 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1825 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1826 unsigned ThisQuals); 1827 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1828 1829 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1830 SourceLocation Loc, 1831 llvm::ArrayRef<Expr *> Args, 1832 ADLResult &Functions, 1833 bool StdNamespaceIsAssociated = false); 1834 1835 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1836 VisibleDeclConsumer &Consumer, 1837 bool IncludeGlobalScope = true); 1838 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1839 VisibleDeclConsumer &Consumer, 1840 bool IncludeGlobalScope = true); 1841 1842 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1843 Sema::LookupNameKind LookupKind, 1844 Scope *S, CXXScopeSpec *SS, 1845 CorrectionCandidateCallback &CCC, 1846 DeclContext *MemberContext = 0, 1847 bool EnteringContext = false, 1848 const ObjCObjectPointerType *OPT = 0); 1849 1850 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 1851 AssociatedNamespaceSet &AssociatedNamespaces, 1852 AssociatedClassSet &AssociatedClasses); 1853 1854 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1855 bool ConsiderLinkage, 1856 bool ExplicitInstantiationOrSpecialization); 1857 1858 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1859 //@} 1860 1861 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1862 SourceLocation IdLoc, 1863 bool TypoCorrection = false); 1864 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1865 Scope *S, bool ForRedeclaration, 1866 SourceLocation Loc); 1867 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1868 Scope *S); 1869 void AddKnownFunctionAttributes(FunctionDecl *FD); 1870 1871 // More parsing and symbol table subroutines. 1872 1873 // Decl attributes - this routine is the top level dispatcher. 1874 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1875 bool NonInheritable = true, bool Inheritable = true); 1876 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1877 bool NonInheritable = true, bool Inheritable = true); 1878 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1879 const AttributeList *AttrList); 1880 1881 void checkUnusedDeclAttributes(Declarator &D); 1882 1883 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1884 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1885 bool CheckNoReturnAttr(const AttributeList &attr); 1886 1887 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1888 bool &IncompleteImpl, unsigned DiagID); 1889 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1890 ObjCMethodDecl *MethodDecl, 1891 bool IsProtocolMethodDecl); 1892 1893 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1894 ObjCMethodDecl *Overridden, 1895 bool IsProtocolMethodDecl); 1896 1897 /// WarnExactTypedMethods - This routine issues a warning if method 1898 /// implementation declaration matches exactly that of its declaration. 1899 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1900 ObjCMethodDecl *MethodDecl, 1901 bool IsProtocolMethodDecl); 1902 1903 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1904 ObjCInterfaceDecl *IDecl); 1905 1906 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1907 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1908 1909 /// CheckProtocolMethodDefs - This routine checks unimplemented 1910 /// methods declared in protocol, and those referenced by it. 1911 /// \param IDecl - Used for checking for methods which may have been 1912 /// inherited. 1913 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1914 ObjCProtocolDecl *PDecl, 1915 bool& IncompleteImpl, 1916 const SelectorSet &InsMap, 1917 const SelectorSet &ClsMap, 1918 ObjCContainerDecl *CDecl); 1919 1920 /// CheckImplementationIvars - This routine checks if the instance variables 1921 /// listed in the implelementation match those listed in the interface. 1922 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1923 ObjCIvarDecl **Fields, unsigned nIvars, 1924 SourceLocation Loc); 1925 1926 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1927 /// remains unimplemented in the class or category @implementation. 1928 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1929 ObjCContainerDecl* IDecl, 1930 bool IncompleteImpl = false); 1931 1932 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1933 /// which must be implemented by this implementation. 1934 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1935 ObjCContainerDecl *CDecl, 1936 const SelectorSet &InsMap); 1937 1938 /// DefaultSynthesizeProperties - This routine default synthesizes all 1939 /// properties which must be synthesized in class's @implementation. 1940 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1941 ObjCInterfaceDecl *IDecl); 1942 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1943 1944 /// CollectImmediateProperties - This routine collects all properties in 1945 /// the class and its conforming protocols; but not those it its super class. 1946 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1947 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1948 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1949 1950 1951 /// LookupPropertyDecl - Looks up a property in the current class and all 1952 /// its protocols. 1953 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1954 IdentifierInfo *II); 1955 1956 /// Called by ActOnProperty to handle @property declarations in 1957 //// class extensions. 1958 Decl *HandlePropertyInClassExtension(Scope *S, 1959 SourceLocation AtLoc, 1960 FieldDeclarator &FD, 1961 Selector GetterSel, 1962 Selector SetterSel, 1963 const bool isAssign, 1964 const bool isReadWrite, 1965 const unsigned Attributes, 1966 const unsigned AttributesAsWritten, 1967 bool *isOverridingProperty, 1968 TypeSourceInfo *T, 1969 tok::ObjCKeywordKind MethodImplKind); 1970 1971 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1972 /// handle creating the ObjcPropertyDecl for a category or @interface. 1973 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1974 ObjCContainerDecl *CDecl, 1975 SourceLocation AtLoc, 1976 FieldDeclarator &FD, 1977 Selector GetterSel, 1978 Selector SetterSel, 1979 const bool isAssign, 1980 const bool isReadWrite, 1981 const unsigned Attributes, 1982 const unsigned AttributesAsWritten, 1983 TypeSourceInfo *T, 1984 tok::ObjCKeywordKind MethodImplKind, 1985 DeclContext *lexicalDC = 0); 1986 1987 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1988 /// warning) when atomic property has one but not the other user-declared 1989 /// setter or getter. 1990 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1991 ObjCContainerDecl* IDecl); 1992 1993 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1994 1995 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1996 1997 enum MethodMatchStrategy { 1998 MMS_loose, 1999 MMS_strict 2000 }; 2001 2002 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2003 /// true, or false, accordingly. 2004 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2005 const ObjCMethodDecl *PrevMethod, 2006 MethodMatchStrategy strategy = MMS_strict); 2007 2008 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2009 /// or protocol against those declared in their implementations. 2010 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2011 const SelectorSet &ClsMap, 2012 SelectorSet &InsMapSeen, 2013 SelectorSet &ClsMapSeen, 2014 ObjCImplDecl* IMPDecl, 2015 ObjCContainerDecl* IDecl, 2016 bool &IncompleteImpl, 2017 bool ImmediateClass, 2018 bool WarnCategoryMethodImpl=false); 2019 2020 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2021 /// category matches with those implemented in its primary class and 2022 /// warns each time an exact match is found. 2023 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2024 2025 /// \brief Add the given method to the list of globally-known methods. 2026 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2027 2028private: 2029 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2030 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2031 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2032 2033 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2034 /// optionally warns if there are multiple signatures. 2035 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2036 bool receiverIdOrClass, 2037 bool warn, bool instance); 2038 2039public: 2040 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2041 /// unit are added to a global pool. This allows us to efficiently associate 2042 /// a selector with a method declaraation for purposes of typechecking 2043 /// messages sent to "id" (where the class of the object is unknown). 2044 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2045 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2046 } 2047 2048 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2049 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2050 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2051 } 2052 2053 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2054 /// pool. 2055 void AddAnyMethodToGlobalPool(Decl *D); 2056 2057 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2058 /// there are multiple signatures. 2059 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2060 bool receiverIdOrClass=false, 2061 bool warn=true) { 2062 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2063 warn, /*instance*/true); 2064 } 2065 2066 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2067 /// there are multiple signatures. 2068 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2069 bool receiverIdOrClass=false, 2070 bool warn=true) { 2071 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2072 warn, /*instance*/false); 2073 } 2074 2075 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2076 /// implementation. 2077 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2078 2079 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2080 /// initialization. 2081 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2082 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2083 2084 //===--------------------------------------------------------------------===// 2085 // Statement Parsing Callbacks: SemaStmt.cpp. 2086public: 2087 class FullExprArg { 2088 public: 2089 FullExprArg(Sema &actions) : E(0) { } 2090 2091 // FIXME: The const_cast here is ugly. RValue references would make this 2092 // much nicer (or we could duplicate a bunch of the move semantics 2093 // emulation code from Ownership.h). 2094 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2095 2096 ExprResult release() { 2097 return move(E); 2098 } 2099 2100 Expr *get() const { return E; } 2101 2102 Expr *operator->() { 2103 return E; 2104 } 2105 2106 private: 2107 // FIXME: No need to make the entire Sema class a friend when it's just 2108 // Sema::MakeFullExpr that needs access to the constructor below. 2109 friend class Sema; 2110 2111 explicit FullExprArg(Expr *expr) : E(expr) {} 2112 2113 Expr *E; 2114 }; 2115 2116 FullExprArg MakeFullExpr(Expr *Arg) { 2117 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2118 } 2119 2120 StmtResult ActOnExprStmt(FullExprArg Expr); 2121 2122 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2123 bool HasLeadingEmptyMacro = false); 2124 2125 void ActOnStartOfCompoundStmt(); 2126 void ActOnFinishOfCompoundStmt(); 2127 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2128 MultiStmtArg Elts, 2129 bool isStmtExpr); 2130 2131 /// \brief A RAII object to enter scope of a compound statement. 2132 class CompoundScopeRAII { 2133 public: 2134 CompoundScopeRAII(Sema &S): S(S) { 2135 S.ActOnStartOfCompoundStmt(); 2136 } 2137 2138 ~CompoundScopeRAII() { 2139 S.ActOnFinishOfCompoundStmt(); 2140 } 2141 2142 private: 2143 Sema &S; 2144 }; 2145 2146 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2147 SourceLocation StartLoc, 2148 SourceLocation EndLoc); 2149 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2150 StmtResult ActOnForEachLValueExpr(Expr *E); 2151 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2152 SourceLocation DotDotDotLoc, Expr *RHSVal, 2153 SourceLocation ColonLoc); 2154 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2155 2156 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2157 SourceLocation ColonLoc, 2158 Stmt *SubStmt, Scope *CurScope); 2159 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2160 SourceLocation ColonLoc, Stmt *SubStmt); 2161 2162 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2163 FullExprArg CondVal, Decl *CondVar, 2164 Stmt *ThenVal, 2165 SourceLocation ElseLoc, Stmt *ElseVal); 2166 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2167 Expr *Cond, 2168 Decl *CondVar); 2169 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2170 Stmt *Switch, Stmt *Body); 2171 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2172 FullExprArg Cond, 2173 Decl *CondVar, Stmt *Body); 2174 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2175 SourceLocation WhileLoc, 2176 SourceLocation CondLParen, Expr *Cond, 2177 SourceLocation CondRParen); 2178 2179 StmtResult ActOnForStmt(SourceLocation ForLoc, 2180 SourceLocation LParenLoc, 2181 Stmt *First, FullExprArg Second, 2182 Decl *SecondVar, 2183 FullExprArg Third, 2184 SourceLocation RParenLoc, 2185 Stmt *Body); 2186 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2187 Expr *collection); 2188 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2189 SourceLocation LParenLoc, 2190 Stmt *First, Expr *Second, 2191 SourceLocation RParenLoc, Stmt *Body); 2192 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2193 SourceLocation LParenLoc, Stmt *LoopVar, 2194 SourceLocation ColonLoc, Expr *Collection, 2195 SourceLocation RParenLoc); 2196 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2197 SourceLocation ColonLoc, 2198 Stmt *RangeDecl, Stmt *BeginEndDecl, 2199 Expr *Cond, Expr *Inc, 2200 Stmt *LoopVarDecl, 2201 SourceLocation RParenLoc); 2202 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2203 2204 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2205 SourceLocation LabelLoc, 2206 LabelDecl *TheDecl); 2207 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2208 SourceLocation StarLoc, 2209 Expr *DestExp); 2210 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2211 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2212 2213 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2214 bool AllowFunctionParameters); 2215 2216 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2217 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2218 2219 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2220 bool IsSimple, bool IsVolatile, 2221 unsigned NumOutputs, unsigned NumInputs, 2222 IdentifierInfo **Names, 2223 MultiExprArg Constraints, 2224 MultiExprArg Exprs, 2225 Expr *AsmString, 2226 MultiExprArg Clobbers, 2227 SourceLocation RParenLoc, 2228 bool MSAsm = false); 2229 2230 2231 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2232 SourceLocation StartLoc, 2233 SourceLocation IdLoc, IdentifierInfo *Id, 2234 bool Invalid = false); 2235 2236 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2237 2238 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2239 Decl *Parm, Stmt *Body); 2240 2241 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2242 2243 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2244 MultiStmtArg Catch, Stmt *Finally); 2245 2246 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2247 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2248 Scope *CurScope); 2249 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2250 Expr *operand); 2251 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2252 Expr *SynchExpr, 2253 Stmt *SynchBody); 2254 2255 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2256 2257 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2258 SourceLocation StartLoc, 2259 SourceLocation IdLoc, 2260 IdentifierInfo *Id); 2261 2262 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2263 2264 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2265 Decl *ExDecl, Stmt *HandlerBlock); 2266 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2267 MultiStmtArg Handlers); 2268 2269 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2270 SourceLocation TryLoc, 2271 Stmt *TryBlock, 2272 Stmt *Handler); 2273 2274 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2275 Expr *FilterExpr, 2276 Stmt *Block); 2277 2278 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2279 Stmt *Block); 2280 2281 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2282 2283 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2284 2285 /// \brief If it's a file scoped decl that must warn if not used, keep track 2286 /// of it. 2287 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2288 2289 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2290 /// whose result is unused, warn. 2291 void DiagnoseUnusedExprResult(const Stmt *S); 2292 void DiagnoseUnusedDecl(const NamedDecl *ND); 2293 2294 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2295 /// statement as a \p Body, and it is located on the same line. 2296 /// 2297 /// This helps prevent bugs due to typos, such as: 2298 /// if (condition); 2299 /// do_stuff(); 2300 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2301 const Stmt *Body, 2302 unsigned DiagID); 2303 2304 /// Warn if a for/while loop statement \p S, which is followed by 2305 /// \p PossibleBody, has a suspicious null statement as a body. 2306 void DiagnoseEmptyLoopBody(const Stmt *S, 2307 const Stmt *PossibleBody); 2308 2309 ParsingDeclState PushParsingDeclaration() { 2310 return DelayedDiagnostics.pushParsingDecl(); 2311 } 2312 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2313 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2314 } 2315 2316 typedef ProcessingContextState ParsingClassState; 2317 ParsingClassState PushParsingClass() { 2318 return DelayedDiagnostics.pushContext(); 2319 } 2320 void PopParsingClass(ParsingClassState state) { 2321 DelayedDiagnostics.popContext(state); 2322 } 2323 2324 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2325 SourceLocation Loc, 2326 const ObjCInterfaceDecl *UnknownObjCClass=0); 2327 2328 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2329 2330 bool makeUnavailableInSystemHeader(SourceLocation loc, 2331 StringRef message); 2332 2333 //===--------------------------------------------------------------------===// 2334 // Expression Parsing Callbacks: SemaExpr.cpp. 2335 2336 bool CanUseDecl(NamedDecl *D); 2337 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2338 const ObjCInterfaceDecl *UnknownObjCClass=0); 2339 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2340 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2341 ObjCMethodDecl *Getter, 2342 SourceLocation Loc); 2343 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2344 Expr **Args, unsigned NumArgs); 2345 2346 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2347 Decl *LambdaContextDecl = 0, 2348 bool IsDecltype = false); 2349 2350 void PopExpressionEvaluationContext(); 2351 2352 void DiscardCleanupsInEvaluationContext(); 2353 2354 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2355 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2356 2357 ExprResult ActOnConstantExpression(ExprResult Res); 2358 2359 // Functions for marking a declaration referenced. These functions also 2360 // contain the relevant logic for marking if a reference to a function or 2361 // variable is an odr-use (in the C++11 sense). There are separate variants 2362 // for expressions referring to a decl; these exist because odr-use marking 2363 // needs to be delayed for some constant variables when we build one of the 2364 // named expressions. 2365 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2366 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2367 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2368 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2369 void MarkDeclRefReferenced(DeclRefExpr *E); 2370 void MarkMemberReferenced(MemberExpr *E); 2371 2372 void UpdateMarkingForLValueToRValue(Expr *E); 2373 void CleanupVarDeclMarking(); 2374 2375 enum TryCaptureKind { 2376 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2377 }; 2378 2379 /// \brief Try to capture the given variable. 2380 /// 2381 /// \param Var The variable to capture. 2382 /// 2383 /// \param Loc The location at which the capture occurs. 2384 /// 2385 /// \param Kind The kind of capture, which may be implicit (for either a 2386 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2387 /// 2388 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2389 /// an explicit lambda capture. 2390 /// 2391 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2392 /// captures or diagnose errors. If false, this routine merely check whether 2393 /// the capture can occur without performing the capture itself or complaining 2394 /// if the variable cannot be captured. 2395 /// 2396 /// \param CaptureType Will be set to the type of the field used to capture 2397 /// this variable in the innermost block or lambda. Only valid when the 2398 /// variable can be captured. 2399 /// 2400 /// \param DeclRefType Will be set to the type of a refernce to the capture 2401 /// from within the current scope. Only valid when the variable can be 2402 /// captured. 2403 /// 2404 /// \returns true if an error occurred (i.e., the variable cannot be 2405 /// captured) and false if the capture succeeded. 2406 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2407 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2408 QualType &CaptureType, 2409 QualType &DeclRefType); 2410 2411 /// \brief Try to capture the given variable. 2412 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2413 TryCaptureKind Kind = TryCapture_Implicit, 2414 SourceLocation EllipsisLoc = SourceLocation()); 2415 2416 /// \brief Given a variable, determine the type that a reference to that 2417 /// variable will have in the given scope. 2418 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2419 2420 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2421 void MarkDeclarationsReferencedInExpr(Expr *E, 2422 bool SkipLocalVariables = false); 2423 2424 /// \brief Try to recover by turning the given expression into a 2425 /// call. Returns true if recovery was attempted or an error was 2426 /// emitted; this may also leave the ExprResult invalid. 2427 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2428 bool ForceComplain = false, 2429 bool (*IsPlausibleResult)(QualType) = 0); 2430 2431 /// \brief Figure out if an expression could be turned into a call. 2432 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2433 UnresolvedSetImpl &NonTemplateOverloads); 2434 2435 /// \brief Conditionally issue a diagnostic based on the current 2436 /// evaluation context. 2437 /// 2438 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2439 /// the function body is parsed, and then do a basic reachability analysis to 2440 /// determine if the statement is reachable. If it is unreachable, the 2441 /// diagnostic will not be emitted. 2442 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2443 const PartialDiagnostic &PD); 2444 2445 // Primary Expressions. 2446 SourceRange getExprRange(Expr *E) const; 2447 2448 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2449 SourceLocation TemplateKWLoc, 2450 UnqualifiedId &Id, 2451 bool HasTrailingLParen, bool IsAddressOfOperand, 2452 CorrectionCandidateCallback *CCC = 0); 2453 2454 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2455 TemplateArgumentListInfo &Buffer, 2456 DeclarationNameInfo &NameInfo, 2457 const TemplateArgumentListInfo *&TemplateArgs); 2458 2459 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2460 CorrectionCandidateCallback &CCC, 2461 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2462 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2463 2464 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2465 IdentifierInfo *II, 2466 bool AllowBuiltinCreation=false); 2467 2468 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2469 SourceLocation TemplateKWLoc, 2470 const DeclarationNameInfo &NameInfo, 2471 bool isAddressOfOperand, 2472 const TemplateArgumentListInfo *TemplateArgs); 2473 2474 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2475 ExprValueKind VK, 2476 SourceLocation Loc, 2477 const CXXScopeSpec *SS = 0); 2478 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2479 ExprValueKind VK, 2480 const DeclarationNameInfo &NameInfo, 2481 const CXXScopeSpec *SS = 0); 2482 ExprResult 2483 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2484 SourceLocation nameLoc, 2485 IndirectFieldDecl *indirectField, 2486 Expr *baseObjectExpr = 0, 2487 SourceLocation opLoc = SourceLocation()); 2488 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2489 SourceLocation TemplateKWLoc, 2490 LookupResult &R, 2491 const TemplateArgumentListInfo *TemplateArgs); 2492 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2493 SourceLocation TemplateKWLoc, 2494 LookupResult &R, 2495 const TemplateArgumentListInfo *TemplateArgs, 2496 bool IsDefiniteInstance); 2497 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2498 const LookupResult &R, 2499 bool HasTrailingLParen); 2500 2501 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2502 const DeclarationNameInfo &NameInfo); 2503 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2504 SourceLocation TemplateKWLoc, 2505 const DeclarationNameInfo &NameInfo, 2506 const TemplateArgumentListInfo *TemplateArgs); 2507 2508 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2509 LookupResult &R, 2510 bool NeedsADL); 2511 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2512 const DeclarationNameInfo &NameInfo, 2513 NamedDecl *D); 2514 2515 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2516 ExprResult ActOnNumericConstant(const Token &Tok); 2517 ExprResult ActOnCharacterConstant(const Token &Tok); 2518 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2519 ExprResult ActOnParenListExpr(SourceLocation L, 2520 SourceLocation R, 2521 MultiExprArg Val); 2522 2523 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2524 /// fragments (e.g. "foo" "bar" L"baz"). 2525 ExprResult ActOnStringLiteral(const Token *StringToks, 2526 unsigned NumStringToks); 2527 2528 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2529 SourceLocation DefaultLoc, 2530 SourceLocation RParenLoc, 2531 Expr *ControllingExpr, 2532 MultiTypeArg ArgTypes, 2533 MultiExprArg ArgExprs); 2534 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2535 SourceLocation DefaultLoc, 2536 SourceLocation RParenLoc, 2537 Expr *ControllingExpr, 2538 TypeSourceInfo **Types, 2539 Expr **Exprs, 2540 unsigned NumAssocs); 2541 2542 // Binary/Unary Operators. 'Tok' is the token for the operator. 2543 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2544 Expr *InputExpr); 2545 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2546 UnaryOperatorKind Opc, Expr *Input); 2547 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2548 tok::TokenKind Op, Expr *Input); 2549 2550 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2551 SourceLocation OpLoc, 2552 UnaryExprOrTypeTrait ExprKind, 2553 SourceRange R); 2554 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2555 UnaryExprOrTypeTrait ExprKind); 2556 ExprResult 2557 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2558 UnaryExprOrTypeTrait ExprKind, 2559 bool IsType, void *TyOrEx, 2560 const SourceRange &ArgRange); 2561 2562 ExprResult CheckPlaceholderExpr(Expr *E); 2563 bool CheckVecStepExpr(Expr *E); 2564 2565 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2566 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2567 SourceRange ExprRange, 2568 UnaryExprOrTypeTrait ExprKind); 2569 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2570 SourceLocation OpLoc, 2571 IdentifierInfo &Name, 2572 SourceLocation NameLoc, 2573 SourceLocation RParenLoc); 2574 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2575 tok::TokenKind Kind, Expr *Input); 2576 2577 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2578 Expr *Idx, SourceLocation RLoc); 2579 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2580 Expr *Idx, SourceLocation RLoc); 2581 2582 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2583 SourceLocation OpLoc, bool IsArrow, 2584 CXXScopeSpec &SS, 2585 SourceLocation TemplateKWLoc, 2586 NamedDecl *FirstQualifierInScope, 2587 const DeclarationNameInfo &NameInfo, 2588 const TemplateArgumentListInfo *TemplateArgs); 2589 2590 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2591 SourceLocation OpLoc, bool IsArrow, 2592 const CXXScopeSpec &SS, 2593 SourceLocation TemplateKWLoc, 2594 NamedDecl *FirstQualifierInScope, 2595 LookupResult &R, 2596 const TemplateArgumentListInfo *TemplateArgs, 2597 bool SuppressQualifierCheck = false); 2598 2599 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2600 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2601 bool &IsArrow, SourceLocation OpLoc, 2602 CXXScopeSpec &SS, 2603 Decl *ObjCImpDecl, 2604 bool HasTemplateArgs); 2605 2606 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2607 const CXXScopeSpec &SS, 2608 const LookupResult &R); 2609 2610 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2611 bool IsArrow, SourceLocation OpLoc, 2612 const CXXScopeSpec &SS, 2613 SourceLocation TemplateKWLoc, 2614 NamedDecl *FirstQualifierInScope, 2615 const DeclarationNameInfo &NameInfo, 2616 const TemplateArgumentListInfo *TemplateArgs); 2617 2618 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2619 SourceLocation OpLoc, 2620 tok::TokenKind OpKind, 2621 CXXScopeSpec &SS, 2622 SourceLocation TemplateKWLoc, 2623 UnqualifiedId &Member, 2624 Decl *ObjCImpDecl, 2625 bool HasTrailingLParen); 2626 2627 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2628 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2629 FunctionDecl *FDecl, 2630 const FunctionProtoType *Proto, 2631 Expr **Args, unsigned NumArgs, 2632 SourceLocation RParenLoc, 2633 bool ExecConfig = false); 2634 void CheckStaticArrayArgument(SourceLocation CallLoc, 2635 ParmVarDecl *Param, 2636 const Expr *ArgExpr); 2637 2638 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2639 /// This provides the location of the left/right parens and a list of comma 2640 /// locations. 2641 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2642 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2643 Expr *ExecConfig = 0, bool IsExecConfig = false); 2644 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2645 SourceLocation LParenLoc, 2646 Expr **Args, unsigned NumArgs, 2647 SourceLocation RParenLoc, 2648 Expr *Config = 0, 2649 bool IsExecConfig = false); 2650 2651 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2652 MultiExprArg ExecConfig, 2653 SourceLocation GGGLoc); 2654 2655 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2656 Declarator &D, ParsedType &Ty, 2657 SourceLocation RParenLoc, Expr *CastExpr); 2658 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2659 TypeSourceInfo *Ty, 2660 SourceLocation RParenLoc, 2661 Expr *Op); 2662 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2663 2664 /// \brief Build an altivec or OpenCL literal. 2665 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2666 SourceLocation RParenLoc, Expr *E, 2667 TypeSourceInfo *TInfo); 2668 2669 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2670 2671 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2672 ParsedType Ty, 2673 SourceLocation RParenLoc, 2674 Expr *InitExpr); 2675 2676 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2677 TypeSourceInfo *TInfo, 2678 SourceLocation RParenLoc, 2679 Expr *LiteralExpr); 2680 2681 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2682 MultiExprArg InitArgList, 2683 SourceLocation RBraceLoc); 2684 2685 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2686 SourceLocation Loc, 2687 bool GNUSyntax, 2688 ExprResult Init); 2689 2690 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2691 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2692 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2693 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2694 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2695 Expr *LHSExpr, Expr *RHSExpr); 2696 2697 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2698 /// in the case of a the GNU conditional expr extension. 2699 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2700 SourceLocation ColonLoc, 2701 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2702 2703 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2704 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2705 LabelDecl *TheDecl); 2706 2707 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2708 SourceLocation RPLoc); // "({..})" 2709 2710 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2711 struct OffsetOfComponent { 2712 SourceLocation LocStart, LocEnd; 2713 bool isBrackets; // true if [expr], false if .ident 2714 union { 2715 IdentifierInfo *IdentInfo; 2716 Expr *E; 2717 } U; 2718 }; 2719 2720 /// __builtin_offsetof(type, a.b[123][456].c) 2721 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2722 TypeSourceInfo *TInfo, 2723 OffsetOfComponent *CompPtr, 2724 unsigned NumComponents, 2725 SourceLocation RParenLoc); 2726 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2727 SourceLocation BuiltinLoc, 2728 SourceLocation TypeLoc, 2729 ParsedType ParsedArgTy, 2730 OffsetOfComponent *CompPtr, 2731 unsigned NumComponents, 2732 SourceLocation RParenLoc); 2733 2734 // __builtin_choose_expr(constExpr, expr1, expr2) 2735 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2736 Expr *CondExpr, Expr *LHSExpr, 2737 Expr *RHSExpr, SourceLocation RPLoc); 2738 2739 // __builtin_va_arg(expr, type) 2740 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2741 SourceLocation RPLoc); 2742 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2743 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2744 2745 // __null 2746 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2747 2748 bool CheckCaseExpression(Expr *E); 2749 2750 /// \brief Describes the result of an "if-exists" condition check. 2751 enum IfExistsResult { 2752 /// \brief The symbol exists. 2753 IER_Exists, 2754 2755 /// \brief The symbol does not exist. 2756 IER_DoesNotExist, 2757 2758 /// \brief The name is a dependent name, so the results will differ 2759 /// from one instantiation to the next. 2760 IER_Dependent, 2761 2762 /// \brief An error occurred. 2763 IER_Error 2764 }; 2765 2766 IfExistsResult 2767 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2768 const DeclarationNameInfo &TargetNameInfo); 2769 2770 IfExistsResult 2771 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2772 bool IsIfExists, CXXScopeSpec &SS, 2773 UnqualifiedId &Name); 2774 2775 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2776 bool IsIfExists, 2777 NestedNameSpecifierLoc QualifierLoc, 2778 DeclarationNameInfo NameInfo, 2779 Stmt *Nested); 2780 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2781 bool IsIfExists, 2782 CXXScopeSpec &SS, UnqualifiedId &Name, 2783 Stmt *Nested); 2784 2785 //===------------------------- "Block" Extension ------------------------===// 2786 2787 /// ActOnBlockStart - This callback is invoked when a block literal is 2788 /// started. 2789 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2790 2791 /// ActOnBlockArguments - This callback allows processing of block arguments. 2792 /// If there are no arguments, this is still invoked. 2793 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2794 2795 /// ActOnBlockError - If there is an error parsing a block, this callback 2796 /// is invoked to pop the information about the block from the action impl. 2797 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2798 2799 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2800 /// literal was successfully completed. ^(int x){...} 2801 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2802 Scope *CurScope); 2803 2804 //===---------------------------- OpenCL Features -----------------------===// 2805 2806 /// __builtin_astype(...) 2807 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2808 SourceLocation BuiltinLoc, 2809 SourceLocation RParenLoc); 2810 2811 //===---------------------------- C++ Features --------------------------===// 2812 2813 // Act on C++ namespaces 2814 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2815 SourceLocation NamespaceLoc, 2816 SourceLocation IdentLoc, 2817 IdentifierInfo *Ident, 2818 SourceLocation LBrace, 2819 AttributeList *AttrList); 2820 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2821 2822 NamespaceDecl *getStdNamespace() const; 2823 NamespaceDecl *getOrCreateStdNamespace(); 2824 2825 CXXRecordDecl *getStdBadAlloc() const; 2826 2827 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2828 /// it is and Element is not NULL, assigns the element type to Element. 2829 bool isStdInitializerList(QualType Ty, QualType *Element); 2830 2831 /// \brief Looks for the std::initializer_list template and instantiates it 2832 /// with Element, or emits an error if it's not found. 2833 /// 2834 /// \returns The instantiated template, or null on error. 2835 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2836 2837 /// \brief Determine whether Ctor is an initializer-list constructor, as 2838 /// defined in [dcl.init.list]p2. 2839 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2840 2841 Decl *ActOnUsingDirective(Scope *CurScope, 2842 SourceLocation UsingLoc, 2843 SourceLocation NamespcLoc, 2844 CXXScopeSpec &SS, 2845 SourceLocation IdentLoc, 2846 IdentifierInfo *NamespcName, 2847 AttributeList *AttrList); 2848 2849 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2850 2851 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2852 SourceLocation NamespaceLoc, 2853 SourceLocation AliasLoc, 2854 IdentifierInfo *Alias, 2855 CXXScopeSpec &SS, 2856 SourceLocation IdentLoc, 2857 IdentifierInfo *Ident); 2858 2859 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2860 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2861 const LookupResult &PreviousDecls); 2862 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2863 NamedDecl *Target); 2864 2865 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2866 bool isTypeName, 2867 const CXXScopeSpec &SS, 2868 SourceLocation NameLoc, 2869 const LookupResult &Previous); 2870 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2871 const CXXScopeSpec &SS, 2872 SourceLocation NameLoc); 2873 2874 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2875 SourceLocation UsingLoc, 2876 CXXScopeSpec &SS, 2877 const DeclarationNameInfo &NameInfo, 2878 AttributeList *AttrList, 2879 bool IsInstantiation, 2880 bool IsTypeName, 2881 SourceLocation TypenameLoc); 2882 2883 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2884 2885 Decl *ActOnUsingDeclaration(Scope *CurScope, 2886 AccessSpecifier AS, 2887 bool HasUsingKeyword, 2888 SourceLocation UsingLoc, 2889 CXXScopeSpec &SS, 2890 UnqualifiedId &Name, 2891 AttributeList *AttrList, 2892 bool IsTypeName, 2893 SourceLocation TypenameLoc); 2894 Decl *ActOnAliasDeclaration(Scope *CurScope, 2895 AccessSpecifier AS, 2896 MultiTemplateParamsArg TemplateParams, 2897 SourceLocation UsingLoc, 2898 UnqualifiedId &Name, 2899 TypeResult Type); 2900 2901 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2902 /// and sets it as the initializer for the the passed in VarDecl. 2903 bool InitializeVarWithConstructor(VarDecl *VD, 2904 CXXConstructorDecl *Constructor, 2905 MultiExprArg Exprs, 2906 bool HadMultipleCandidates); 2907 2908 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2909 /// including handling of its default argument expressions. 2910 /// 2911 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2912 ExprResult 2913 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2914 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2915 bool HadMultipleCandidates, bool RequiresZeroInit, 2916 unsigned ConstructKind, SourceRange ParenRange); 2917 2918 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2919 // the constructor can be elidable? 2920 ExprResult 2921 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2922 CXXConstructorDecl *Constructor, bool Elidable, 2923 MultiExprArg Exprs, bool HadMultipleCandidates, 2924 bool RequiresZeroInit, unsigned ConstructKind, 2925 SourceRange ParenRange); 2926 2927 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2928 /// the default expr if needed. 2929 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2930 FunctionDecl *FD, 2931 ParmVarDecl *Param); 2932 2933 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2934 /// constructed variable. 2935 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2936 2937 /// \brief Helper class that collects exception specifications for 2938 /// implicitly-declared special member functions. 2939 class ImplicitExceptionSpecification { 2940 // Pointer to allow copying 2941 ASTContext *Context; 2942 // We order exception specifications thus: 2943 // noexcept is the most restrictive, but is only used in C++0x. 2944 // throw() comes next. 2945 // Then a throw(collected exceptions) 2946 // Finally no specification. 2947 // throw(...) is used instead if any called function uses it. 2948 // 2949 // If this exception specification cannot be known yet (for instance, 2950 // because this is the exception specification for a defaulted default 2951 // constructor and we haven't finished parsing the deferred parts of the 2952 // class yet), the C++0x standard does not specify how to behave. We 2953 // record this as an 'unknown' exception specification, which overrules 2954 // any other specification (even 'none', to keep this rule simple). 2955 ExceptionSpecificationType ComputedEST; 2956 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2957 SmallVector<QualType, 4> Exceptions; 2958 2959 void ClearExceptions() { 2960 ExceptionsSeen.clear(); 2961 Exceptions.clear(); 2962 } 2963 2964 public: 2965 explicit ImplicitExceptionSpecification(ASTContext &Context) 2966 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2967 if (!Context.getLangOptions().CPlusPlus0x) 2968 ComputedEST = EST_DynamicNone; 2969 } 2970 2971 /// \brief Get the computed exception specification type. 2972 ExceptionSpecificationType getExceptionSpecType() const { 2973 assert(ComputedEST != EST_ComputedNoexcept && 2974 "noexcept(expr) should not be a possible result"); 2975 return ComputedEST; 2976 } 2977 2978 /// \brief The number of exceptions in the exception specification. 2979 unsigned size() const { return Exceptions.size(); } 2980 2981 /// \brief The set of exceptions in the exception specification. 2982 const QualType *data() const { return Exceptions.data(); } 2983 2984 /// \brief Integrate another called method into the collected data. 2985 void CalledDecl(CXXMethodDecl *Method); 2986 2987 /// \brief Integrate an invoked expression into the collected data. 2988 void CalledExpr(Expr *E); 2989 2990 /// \brief Specify that the exception specification can't be detemined yet. 2991 void SetDelayed() { 2992 ClearExceptions(); 2993 ComputedEST = EST_Delayed; 2994 } 2995 2996 FunctionProtoType::ExtProtoInfo getEPI() const { 2997 FunctionProtoType::ExtProtoInfo EPI; 2998 EPI.ExceptionSpecType = getExceptionSpecType(); 2999 EPI.NumExceptions = size(); 3000 EPI.Exceptions = data(); 3001 return EPI; 3002 } 3003 }; 3004 3005 /// \brief Determine what sort of exception specification a defaulted 3006 /// copy constructor of a class will have. 3007 ImplicitExceptionSpecification 3008 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3009 3010 /// \brief Determine what sort of exception specification a defaulted 3011 /// default constructor of a class will have, and whether the parameter 3012 /// will be const. 3013 std::pair<ImplicitExceptionSpecification, bool> 3014 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3015 3016 /// \brief Determine what sort of exception specification a defautled 3017 /// copy assignment operator of a class will have, and whether the 3018 /// parameter will be const. 3019 std::pair<ImplicitExceptionSpecification, bool> 3020 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3021 3022 /// \brief Determine what sort of exception specification a defaulted move 3023 /// constructor of a class will have. 3024 ImplicitExceptionSpecification 3025 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3026 3027 /// \brief Determine what sort of exception specification a defaulted move 3028 /// assignment operator of a class will have. 3029 ImplicitExceptionSpecification 3030 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3031 3032 /// \brief Determine what sort of exception specification a defaulted 3033 /// destructor of a class will have. 3034 ImplicitExceptionSpecification 3035 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3036 3037 /// \brief Determine if a special member function should have a deleted 3038 /// definition when it is defaulted. 3039 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 3040 3041 /// \brief Declare the implicit default constructor for the given class. 3042 /// 3043 /// \param ClassDecl The class declaration into which the implicit 3044 /// default constructor will be added. 3045 /// 3046 /// \returns The implicitly-declared default constructor. 3047 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3048 CXXRecordDecl *ClassDecl); 3049 3050 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3051 /// defining this constructor as the default constructor. 3052 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3053 CXXConstructorDecl *Constructor); 3054 3055 /// \brief Declare the implicit destructor for the given class. 3056 /// 3057 /// \param ClassDecl The class declaration into which the implicit 3058 /// destructor will be added. 3059 /// 3060 /// \returns The implicitly-declared destructor. 3061 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3062 3063 /// DefineImplicitDestructor - Checks for feasibility of 3064 /// defining this destructor as the default destructor. 3065 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3066 CXXDestructorDecl *Destructor); 3067 3068 /// \brief Build an exception spec for destructors that don't have one. 3069 /// 3070 /// C++11 says that user-defined destructors with no exception spec get one 3071 /// that looks as if the destructor was implicitly declared. 3072 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3073 CXXDestructorDecl *Destructor); 3074 3075 /// \brief Declare all inherited constructors for the given class. 3076 /// 3077 /// \param ClassDecl The class declaration into which the inherited 3078 /// constructors will be added. 3079 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3080 3081 /// \brief Declare the implicit copy constructor for the given class. 3082 /// 3083 /// \param ClassDecl The class declaration into which the implicit 3084 /// copy constructor will be added. 3085 /// 3086 /// \returns The implicitly-declared copy constructor. 3087 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3088 3089 /// DefineImplicitCopyConstructor - Checks for feasibility of 3090 /// defining this constructor as the copy constructor. 3091 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3092 CXXConstructorDecl *Constructor); 3093 3094 /// \brief Declare the implicit move constructor for the given class. 3095 /// 3096 /// \param ClassDecl The Class declaration into which the implicit 3097 /// move constructor will be added. 3098 /// 3099 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3100 /// declared. 3101 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3102 3103 /// DefineImplicitMoveConstructor - Checks for feasibility of 3104 /// defining this constructor as the move constructor. 3105 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3106 CXXConstructorDecl *Constructor); 3107 3108 /// \brief Declare the implicit copy assignment operator for the given class. 3109 /// 3110 /// \param ClassDecl The class declaration into which the implicit 3111 /// copy assignment operator will be added. 3112 /// 3113 /// \returns The implicitly-declared copy assignment operator. 3114 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3115 3116 /// \brief Defines an implicitly-declared copy assignment operator. 3117 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3118 CXXMethodDecl *MethodDecl); 3119 3120 /// \brief Declare the implicit move assignment operator for the given class. 3121 /// 3122 /// \param ClassDecl The Class declaration into which the implicit 3123 /// move assignment operator will be added. 3124 /// 3125 /// \returns The implicitly-declared move assignment operator, or NULL if it 3126 /// wasn't declared. 3127 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3128 3129 /// \brief Defines an implicitly-declared move assignment operator. 3130 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3131 CXXMethodDecl *MethodDecl); 3132 3133 /// \brief Force the declaration of any implicitly-declared members of this 3134 /// class. 3135 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3136 3137 /// \brief Determine whether the given function is an implicitly-deleted 3138 /// special member function. 3139 bool isImplicitlyDeleted(FunctionDecl *FD); 3140 3141 /// MaybeBindToTemporary - If the passed in expression has a record type with 3142 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3143 /// it simply returns the passed in expression. 3144 ExprResult MaybeBindToTemporary(Expr *E); 3145 3146 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3147 MultiExprArg ArgsPtr, 3148 SourceLocation Loc, 3149 ASTOwningVector<Expr*> &ConvertedArgs, 3150 bool AllowExplicit = false); 3151 3152 ParsedType getDestructorName(SourceLocation TildeLoc, 3153 IdentifierInfo &II, SourceLocation NameLoc, 3154 Scope *S, CXXScopeSpec &SS, 3155 ParsedType ObjectType, 3156 bool EnteringContext); 3157 3158 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3159 3160 // Checks that reinterpret casts don't have undefined behavior. 3161 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3162 bool IsDereference, SourceRange Range); 3163 3164 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3165 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3166 tok::TokenKind Kind, 3167 SourceLocation LAngleBracketLoc, 3168 Declarator &D, 3169 SourceLocation RAngleBracketLoc, 3170 SourceLocation LParenLoc, 3171 Expr *E, 3172 SourceLocation RParenLoc); 3173 3174 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3175 tok::TokenKind Kind, 3176 TypeSourceInfo *Ty, 3177 Expr *E, 3178 SourceRange AngleBrackets, 3179 SourceRange Parens); 3180 3181 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3182 SourceLocation TypeidLoc, 3183 TypeSourceInfo *Operand, 3184 SourceLocation RParenLoc); 3185 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3186 SourceLocation TypeidLoc, 3187 Expr *Operand, 3188 SourceLocation RParenLoc); 3189 3190 /// ActOnCXXTypeid - Parse typeid( something ). 3191 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3192 SourceLocation LParenLoc, bool isType, 3193 void *TyOrExpr, 3194 SourceLocation RParenLoc); 3195 3196 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3197 SourceLocation TypeidLoc, 3198 TypeSourceInfo *Operand, 3199 SourceLocation RParenLoc); 3200 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3201 SourceLocation TypeidLoc, 3202 Expr *Operand, 3203 SourceLocation RParenLoc); 3204 3205 /// ActOnCXXUuidof - Parse __uuidof( something ). 3206 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3207 SourceLocation LParenLoc, bool isType, 3208 void *TyOrExpr, 3209 SourceLocation RParenLoc); 3210 3211 3212 //// ActOnCXXThis - Parse 'this' pointer. 3213 ExprResult ActOnCXXThis(SourceLocation loc); 3214 3215 /// \brief Try to retrieve the type of the 'this' pointer. 3216 /// 3217 /// \param Capture If true, capture 'this' in this context. 3218 /// 3219 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3220 QualType getCurrentThisType(); 3221 3222 /// \brief Make sure the value of 'this' is actually available in the current 3223 /// context, if it is a potentially evaluated context. 3224 /// 3225 /// \param Loc The location at which the capture of 'this' occurs. 3226 /// 3227 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3228 /// capture list. 3229 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3230 3231 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3232 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3233 3234 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3235 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3236 3237 //// ActOnCXXThrow - Parse throw expressions. 3238 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3239 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3240 bool IsThrownVarInScope); 3241 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3242 bool IsThrownVarInScope); 3243 3244 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3245 /// Can be interpreted either as function-style casting ("int(x)") 3246 /// or class type construction ("ClassType(x,y,z)") 3247 /// or creation of a value-initialized type ("int()"). 3248 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3249 SourceLocation LParenLoc, 3250 MultiExprArg Exprs, 3251 SourceLocation RParenLoc); 3252 3253 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3254 SourceLocation LParenLoc, 3255 MultiExprArg Exprs, 3256 SourceLocation RParenLoc); 3257 3258 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3259 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3260 SourceLocation PlacementLParen, 3261 MultiExprArg PlacementArgs, 3262 SourceLocation PlacementRParen, 3263 SourceRange TypeIdParens, Declarator &D, 3264 Expr *Initializer); 3265 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3266 SourceLocation PlacementLParen, 3267 MultiExprArg PlacementArgs, 3268 SourceLocation PlacementRParen, 3269 SourceRange TypeIdParens, 3270 QualType AllocType, 3271 TypeSourceInfo *AllocTypeInfo, 3272 Expr *ArraySize, 3273 SourceRange DirectInitRange, 3274 Expr *Initializer, 3275 bool TypeMayContainAuto = true); 3276 3277 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3278 SourceRange R); 3279 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3280 bool UseGlobal, QualType AllocType, bool IsArray, 3281 Expr **PlaceArgs, unsigned NumPlaceArgs, 3282 FunctionDecl *&OperatorNew, 3283 FunctionDecl *&OperatorDelete); 3284 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3285 DeclarationName Name, Expr** Args, 3286 unsigned NumArgs, DeclContext *Ctx, 3287 bool AllowMissing, FunctionDecl *&Operator, 3288 bool Diagnose = true); 3289 void DeclareGlobalNewDelete(); 3290 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3291 QualType Argument, 3292 bool addMallocAttr = false); 3293 3294 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3295 DeclarationName Name, FunctionDecl* &Operator, 3296 bool Diagnose = true); 3297 3298 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3299 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3300 bool UseGlobal, bool ArrayForm, 3301 Expr *Operand); 3302 3303 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3304 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3305 SourceLocation StmtLoc, 3306 bool ConvertToBoolean); 3307 3308 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3309 Expr *Operand, SourceLocation RParen); 3310 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3311 SourceLocation RParen); 3312 3313 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3314 /// pseudo-functions. 3315 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3316 SourceLocation KWLoc, 3317 ParsedType Ty, 3318 SourceLocation RParen); 3319 3320 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3321 SourceLocation KWLoc, 3322 TypeSourceInfo *T, 3323 SourceLocation RParen); 3324 3325 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3326 /// pseudo-functions. 3327 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3328 SourceLocation KWLoc, 3329 ParsedType LhsTy, 3330 ParsedType RhsTy, 3331 SourceLocation RParen); 3332 3333 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3334 SourceLocation KWLoc, 3335 TypeSourceInfo *LhsT, 3336 TypeSourceInfo *RhsT, 3337 SourceLocation RParen); 3338 3339 /// \brief Parsed one of the type trait support pseudo-functions. 3340 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3341 ArrayRef<ParsedType> Args, 3342 SourceLocation RParenLoc); 3343 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3344 ArrayRef<TypeSourceInfo *> Args, 3345 SourceLocation RParenLoc); 3346 3347 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3348 /// pseudo-functions. 3349 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3350 SourceLocation KWLoc, 3351 ParsedType LhsTy, 3352 Expr *DimExpr, 3353 SourceLocation RParen); 3354 3355 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3356 SourceLocation KWLoc, 3357 TypeSourceInfo *TSInfo, 3358 Expr *DimExpr, 3359 SourceLocation RParen); 3360 3361 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3362 /// pseudo-functions. 3363 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3364 SourceLocation KWLoc, 3365 Expr *Queried, 3366 SourceLocation RParen); 3367 3368 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3369 SourceLocation KWLoc, 3370 Expr *Queried, 3371 SourceLocation RParen); 3372 3373 ExprResult ActOnStartCXXMemberReference(Scope *S, 3374 Expr *Base, 3375 SourceLocation OpLoc, 3376 tok::TokenKind OpKind, 3377 ParsedType &ObjectType, 3378 bool &MayBePseudoDestructor); 3379 3380 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3381 3382 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3383 SourceLocation OpLoc, 3384 tok::TokenKind OpKind, 3385 const CXXScopeSpec &SS, 3386 TypeSourceInfo *ScopeType, 3387 SourceLocation CCLoc, 3388 SourceLocation TildeLoc, 3389 PseudoDestructorTypeStorage DestroyedType, 3390 bool HasTrailingLParen); 3391 3392 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3393 SourceLocation OpLoc, 3394 tok::TokenKind OpKind, 3395 CXXScopeSpec &SS, 3396 UnqualifiedId &FirstTypeName, 3397 SourceLocation CCLoc, 3398 SourceLocation TildeLoc, 3399 UnqualifiedId &SecondTypeName, 3400 bool HasTrailingLParen); 3401 3402 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3403 SourceLocation OpLoc, 3404 tok::TokenKind OpKind, 3405 SourceLocation TildeLoc, 3406 const DeclSpec& DS, 3407 bool HasTrailingLParen); 3408 3409 /// MaybeCreateExprWithCleanups - If the current full-expression 3410 /// requires any cleanups, surround it with a ExprWithCleanups node. 3411 /// Otherwise, just returns the passed-in expression. 3412 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3413 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3414 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3415 3416 ExprResult ActOnFinishFullExpr(Expr *Expr); 3417 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3418 3419 // Marks SS invalid if it represents an incomplete type. 3420 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3421 3422 DeclContext *computeDeclContext(QualType T); 3423 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3424 bool EnteringContext = false); 3425 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3426 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3427 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3428 3429 /// \brief The parser has parsed a global nested-name-specifier '::'. 3430 /// 3431 /// \param S The scope in which this nested-name-specifier occurs. 3432 /// 3433 /// \param CCLoc The location of the '::'. 3434 /// 3435 /// \param SS The nested-name-specifier, which will be updated in-place 3436 /// to reflect the parsed nested-name-specifier. 3437 /// 3438 /// \returns true if an error occurred, false otherwise. 3439 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3440 CXXScopeSpec &SS); 3441 3442 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3443 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3444 3445 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3446 SourceLocation IdLoc, 3447 IdentifierInfo &II, 3448 ParsedType ObjectType); 3449 3450 bool BuildCXXNestedNameSpecifier(Scope *S, 3451 IdentifierInfo &Identifier, 3452 SourceLocation IdentifierLoc, 3453 SourceLocation CCLoc, 3454 QualType ObjectType, 3455 bool EnteringContext, 3456 CXXScopeSpec &SS, 3457 NamedDecl *ScopeLookupResult, 3458 bool ErrorRecoveryLookup); 3459 3460 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3461 /// 3462 /// \param S The scope in which this nested-name-specifier occurs. 3463 /// 3464 /// \param Identifier The identifier preceding the '::'. 3465 /// 3466 /// \param IdentifierLoc The location of the identifier. 3467 /// 3468 /// \param CCLoc The location of the '::'. 3469 /// 3470 /// \param ObjectType The type of the object, if we're parsing 3471 /// nested-name-specifier in a member access expression. 3472 /// 3473 /// \param EnteringContext Whether we're entering the context nominated by 3474 /// this nested-name-specifier. 3475 /// 3476 /// \param SS The nested-name-specifier, which is both an input 3477 /// parameter (the nested-name-specifier before this type) and an 3478 /// output parameter (containing the full nested-name-specifier, 3479 /// including this new type). 3480 /// 3481 /// \returns true if an error occurred, false otherwise. 3482 bool ActOnCXXNestedNameSpecifier(Scope *S, 3483 IdentifierInfo &Identifier, 3484 SourceLocation IdentifierLoc, 3485 SourceLocation CCLoc, 3486 ParsedType ObjectType, 3487 bool EnteringContext, 3488 CXXScopeSpec &SS); 3489 3490 ExprResult ActOnDecltypeExpression(Expr *E); 3491 3492 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3493 const DeclSpec &DS, 3494 SourceLocation ColonColonLoc); 3495 3496 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3497 IdentifierInfo &Identifier, 3498 SourceLocation IdentifierLoc, 3499 SourceLocation ColonLoc, 3500 ParsedType ObjectType, 3501 bool EnteringContext); 3502 3503 /// \brief The parser has parsed a nested-name-specifier 3504 /// 'template[opt] template-name < template-args >::'. 3505 /// 3506 /// \param S The scope in which this nested-name-specifier occurs. 3507 /// 3508 /// \param SS The nested-name-specifier, which is both an input 3509 /// parameter (the nested-name-specifier before this type) and an 3510 /// output parameter (containing the full nested-name-specifier, 3511 /// including this new type). 3512 /// 3513 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3514 /// \param TemplateName The template name. 3515 /// \param TemplateNameLoc The location of the template name. 3516 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3517 /// \param TemplateArgs The template arguments. 3518 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3519 /// \param CCLoc The location of the '::'. 3520 /// 3521 /// \param EnteringContext Whether we're entering the context of the 3522 /// nested-name-specifier. 3523 /// 3524 /// 3525 /// \returns true if an error occurred, false otherwise. 3526 bool ActOnCXXNestedNameSpecifier(Scope *S, 3527 CXXScopeSpec &SS, 3528 SourceLocation TemplateKWLoc, 3529 TemplateTy Template, 3530 SourceLocation TemplateNameLoc, 3531 SourceLocation LAngleLoc, 3532 ASTTemplateArgsPtr TemplateArgs, 3533 SourceLocation RAngleLoc, 3534 SourceLocation CCLoc, 3535 bool EnteringContext); 3536 3537 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3538 /// that the parser can use later to reconstruct the given 3539 /// nested-name-specifier. 3540 /// 3541 /// \param SS A nested-name-specifier. 3542 /// 3543 /// \returns A pointer containing all of the information in the 3544 /// nested-name-specifier \p SS. 3545 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3546 3547 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3548 /// the nested-name-specifier structure. 3549 /// 3550 /// \param Annotation The annotation pointer, produced by 3551 /// \c SaveNestedNameSpecifierAnnotation(). 3552 /// 3553 /// \param AnnotationRange The source range corresponding to the annotation. 3554 /// 3555 /// \param SS The nested-name-specifier that will be updated with the contents 3556 /// of the annotation pointer. 3557 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3558 SourceRange AnnotationRange, 3559 CXXScopeSpec &SS); 3560 3561 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3562 3563 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3564 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3565 /// After this method is called, according to [C++ 3.4.3p3], names should be 3566 /// looked up in the declarator-id's scope, until the declarator is parsed and 3567 /// ActOnCXXExitDeclaratorScope is called. 3568 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3569 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3570 3571 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3572 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3573 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3574 /// Used to indicate that names should revert to being looked up in the 3575 /// defining scope. 3576 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3577 3578 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3579 /// initializer for the declaration 'Dcl'. 3580 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3581 /// static data member of class X, names should be looked up in the scope of 3582 /// class X. 3583 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3584 3585 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3586 /// initializer for the declaration 'Dcl'. 3587 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3588 3589 /// \brief Create a new lambda closure type. 3590 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3591 bool KnownDependent = false); 3592 3593 /// \brief Start the definition of a lambda expression. 3594 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3595 SourceRange IntroducerRange, 3596 TypeSourceInfo *MethodType, 3597 SourceLocation EndLoc, 3598 llvm::ArrayRef<ParmVarDecl *> Params); 3599 3600 /// \brief Introduce the scope for a lambda expression. 3601 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3602 SourceRange IntroducerRange, 3603 LambdaCaptureDefault CaptureDefault, 3604 bool ExplicitParams, 3605 bool ExplicitResultType, 3606 bool Mutable); 3607 3608 /// \brief Note that we have finished the explicit captures for the 3609 /// given lambda. 3610 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3611 3612 /// \brief Introduce the lambda parameters into scope. 3613 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3614 3615 /// ActOnStartOfLambdaDefinition - This is called just before we start 3616 /// parsing the body of a lambda; it analyzes the explicit captures and 3617 /// arguments, and sets up various data-structures for the body of the 3618 /// lambda. 3619 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3620 Declarator &ParamInfo, Scope *CurScope); 3621 3622 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3623 /// is invoked to pop the information about the lambda. 3624 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3625 bool IsInstantiation = false); 3626 3627 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3628 /// was successfully completed. 3629 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3630 Scope *CurScope, 3631 llvm::Optional<unsigned> ManglingNumber 3632 = llvm::Optional<unsigned>(), 3633 Decl *ContextDecl = 0, 3634 bool IsInstantiation = false); 3635 3636 /// \brief Define the "body" of the conversion from a lambda object to a 3637 /// function pointer. 3638 /// 3639 /// This routine doesn't actually define a sensible body; rather, it fills 3640 /// in the initialization expression needed to copy the lambda object into 3641 /// the block, and IR generation actually generates the real body of the 3642 /// block pointer conversion. 3643 void DefineImplicitLambdaToFunctionPointerConversion( 3644 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3645 3646 /// \brief Define the "body" of the conversion from a lambda object to a 3647 /// block pointer. 3648 /// 3649 /// This routine doesn't actually define a sensible body; rather, it fills 3650 /// in the initialization expression needed to copy the lambda object into 3651 /// the block, and IR generation actually generates the real body of the 3652 /// block pointer conversion. 3653 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3654 CXXConversionDecl *Conv); 3655 3656 // ParseObjCStringLiteral - Parse Objective-C string literals. 3657 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3658 Expr **Strings, 3659 unsigned NumStrings); 3660 3661 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3662 TypeSourceInfo *EncodedTypeInfo, 3663 SourceLocation RParenLoc); 3664 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3665 CXXMethodDecl *Method, 3666 bool HadMultipleCandidates); 3667 3668 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3669 SourceLocation EncodeLoc, 3670 SourceLocation LParenLoc, 3671 ParsedType Ty, 3672 SourceLocation RParenLoc); 3673 3674 // ParseObjCSelectorExpression - Build selector expression for @selector 3675 ExprResult ParseObjCSelectorExpression(Selector Sel, 3676 SourceLocation AtLoc, 3677 SourceLocation SelLoc, 3678 SourceLocation LParenLoc, 3679 SourceLocation RParenLoc); 3680 3681 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3682 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3683 SourceLocation AtLoc, 3684 SourceLocation ProtoLoc, 3685 SourceLocation LParenLoc, 3686 SourceLocation RParenLoc); 3687 3688 //===--------------------------------------------------------------------===// 3689 // C++ Declarations 3690 // 3691 Decl *ActOnStartLinkageSpecification(Scope *S, 3692 SourceLocation ExternLoc, 3693 SourceLocation LangLoc, 3694 StringRef Lang, 3695 SourceLocation LBraceLoc); 3696 Decl *ActOnFinishLinkageSpecification(Scope *S, 3697 Decl *LinkageSpec, 3698 SourceLocation RBraceLoc); 3699 3700 3701 //===--------------------------------------------------------------------===// 3702 // C++ Classes 3703 // 3704 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3705 const CXXScopeSpec *SS = 0); 3706 3707 bool ActOnAccessSpecifier(AccessSpecifier Access, 3708 SourceLocation ASLoc, 3709 SourceLocation ColonLoc, 3710 AttributeList *Attrs = 0); 3711 3712 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3713 Declarator &D, 3714 MultiTemplateParamsArg TemplateParameterLists, 3715 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3716 bool HasDeferredInit); 3717 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3718 Expr *Init); 3719 3720 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3721 Scope *S, 3722 CXXScopeSpec &SS, 3723 IdentifierInfo *MemberOrBase, 3724 ParsedType TemplateTypeTy, 3725 const DeclSpec &DS, 3726 SourceLocation IdLoc, 3727 SourceLocation LParenLoc, 3728 Expr **Args, unsigned NumArgs, 3729 SourceLocation RParenLoc, 3730 SourceLocation EllipsisLoc); 3731 3732 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3733 Scope *S, 3734 CXXScopeSpec &SS, 3735 IdentifierInfo *MemberOrBase, 3736 ParsedType TemplateTypeTy, 3737 const DeclSpec &DS, 3738 SourceLocation IdLoc, 3739 Expr *InitList, 3740 SourceLocation EllipsisLoc); 3741 3742 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3743 Scope *S, 3744 CXXScopeSpec &SS, 3745 IdentifierInfo *MemberOrBase, 3746 ParsedType TemplateTypeTy, 3747 const DeclSpec &DS, 3748 SourceLocation IdLoc, 3749 Expr *Init, 3750 SourceLocation EllipsisLoc); 3751 3752 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3753 Expr *Init, 3754 SourceLocation IdLoc); 3755 3756 MemInitResult BuildBaseInitializer(QualType BaseType, 3757 TypeSourceInfo *BaseTInfo, 3758 Expr *Init, 3759 CXXRecordDecl *ClassDecl, 3760 SourceLocation EllipsisLoc); 3761 3762 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3763 Expr *Init, 3764 CXXRecordDecl *ClassDecl); 3765 3766 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3767 CXXCtorInitializer *Initializer); 3768 3769 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3770 CXXCtorInitializer **Initializers, 3771 unsigned NumInitializers, bool AnyErrors); 3772 3773 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3774 3775 3776 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3777 /// mark all the non-trivial destructors of its members and bases as 3778 /// referenced. 3779 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3780 CXXRecordDecl *Record); 3781 3782 /// \brief The list of classes whose vtables have been used within 3783 /// this translation unit, and the source locations at which the 3784 /// first use occurred. 3785 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3786 3787 /// \brief The list of vtables that are required but have not yet been 3788 /// materialized. 3789 SmallVector<VTableUse, 16> VTableUses; 3790 3791 /// \brief The set of classes whose vtables have been used within 3792 /// this translation unit, and a bit that will be true if the vtable is 3793 /// required to be emitted (otherwise, it should be emitted only if needed 3794 /// by code generation). 3795 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3796 3797 /// \brief Load any externally-stored vtable uses. 3798 void LoadExternalVTableUses(); 3799 3800 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3801 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3802 DynamicClassesType; 3803 3804 /// \brief A list of all of the dynamic classes in this translation 3805 /// unit. 3806 DynamicClassesType DynamicClasses; 3807 3808 /// \brief Note that the vtable for the given class was used at the 3809 /// given location. 3810 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3811 bool DefinitionRequired = false); 3812 3813 /// MarkVirtualMembersReferenced - Will mark all members of the given 3814 /// CXXRecordDecl referenced. 3815 void MarkVirtualMembersReferenced(SourceLocation Loc, 3816 const CXXRecordDecl *RD); 3817 3818 /// \brief Define all of the vtables that have been used in this 3819 /// translation unit and reference any virtual members used by those 3820 /// vtables. 3821 /// 3822 /// \returns true if any work was done, false otherwise. 3823 bool DefineUsedVTables(); 3824 3825 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3826 3827 void ActOnMemInitializers(Decl *ConstructorDecl, 3828 SourceLocation ColonLoc, 3829 CXXCtorInitializer **MemInits, 3830 unsigned NumMemInits, 3831 bool AnyErrors); 3832 3833 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3834 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3835 Decl *TagDecl, 3836 SourceLocation LBrac, 3837 SourceLocation RBrac, 3838 AttributeList *AttrList); 3839 3840 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3841 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3842 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3843 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3844 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3845 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3846 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3847 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3848 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3849 bool IsInsideALocalClassWithinATemplateFunction(); 3850 3851 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3852 Expr *AssertExpr, 3853 Expr *AssertMessageExpr, 3854 SourceLocation RParenLoc); 3855 3856 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3857 SourceLocation FriendLoc, 3858 TypeSourceInfo *TSInfo); 3859 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3860 MultiTemplateParamsArg TemplateParams); 3861 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3862 MultiTemplateParamsArg TemplateParams); 3863 3864 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3865 StorageClass& SC); 3866 void CheckConstructor(CXXConstructorDecl *Constructor); 3867 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3868 StorageClass& SC); 3869 bool CheckDestructor(CXXDestructorDecl *Destructor); 3870 void CheckConversionDeclarator(Declarator &D, QualType &R, 3871 StorageClass& SC); 3872 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3873 3874 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3875 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3876 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3877 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3878 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3879 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3880 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3881 3882 //===--------------------------------------------------------------------===// 3883 // C++ Derived Classes 3884 // 3885 3886 /// ActOnBaseSpecifier - Parsed a base specifier 3887 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3888 SourceRange SpecifierRange, 3889 bool Virtual, AccessSpecifier Access, 3890 TypeSourceInfo *TInfo, 3891 SourceLocation EllipsisLoc); 3892 3893 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3894 SourceRange SpecifierRange, 3895 bool Virtual, AccessSpecifier Access, 3896 ParsedType basetype, 3897 SourceLocation BaseLoc, 3898 SourceLocation EllipsisLoc); 3899 3900 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3901 unsigned NumBases); 3902 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3903 unsigned NumBases); 3904 3905 bool IsDerivedFrom(QualType Derived, QualType Base); 3906 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3907 3908 // FIXME: I don't like this name. 3909 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3910 3911 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3912 3913 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3914 SourceLocation Loc, SourceRange Range, 3915 CXXCastPath *BasePath = 0, 3916 bool IgnoreAccess = false); 3917 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3918 unsigned InaccessibleBaseID, 3919 unsigned AmbigiousBaseConvID, 3920 SourceLocation Loc, SourceRange Range, 3921 DeclarationName Name, 3922 CXXCastPath *BasePath); 3923 3924 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3925 3926 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3927 /// covariant, according to C++ [class.virtual]p5. 3928 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3929 const CXXMethodDecl *Old); 3930 3931 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3932 /// spec is a subset of base spec. 3933 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3934 const CXXMethodDecl *Old); 3935 3936 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3937 3938 /// CheckOverrideControl - Check C++0x override control semantics. 3939 void CheckOverrideControl(const Decl *D); 3940 3941 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3942 /// overrides a virtual member function marked 'final', according to 3943 /// C++0x [class.virtual]p3. 3944 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3945 const CXXMethodDecl *Old); 3946 3947 3948 //===--------------------------------------------------------------------===// 3949 // C++ Access Control 3950 // 3951 3952 enum AccessResult { 3953 AR_accessible, 3954 AR_inaccessible, 3955 AR_dependent, 3956 AR_delayed 3957 }; 3958 3959 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3960 NamedDecl *PrevMemberDecl, 3961 AccessSpecifier LexicalAS); 3962 3963 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3964 DeclAccessPair FoundDecl); 3965 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3966 DeclAccessPair FoundDecl); 3967 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3968 SourceRange PlacementRange, 3969 CXXRecordDecl *NamingClass, 3970 DeclAccessPair FoundDecl, 3971 bool Diagnose = true); 3972 AccessResult CheckConstructorAccess(SourceLocation Loc, 3973 CXXConstructorDecl *D, 3974 const InitializedEntity &Entity, 3975 AccessSpecifier Access, 3976 bool IsCopyBindingRefToTemp = false); 3977 AccessResult CheckConstructorAccess(SourceLocation Loc, 3978 CXXConstructorDecl *D, 3979 AccessSpecifier Access, 3980 PartialDiagnostic PD); 3981 AccessResult CheckDestructorAccess(SourceLocation Loc, 3982 CXXDestructorDecl *Dtor, 3983 const PartialDiagnostic &PDiag); 3984 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3985 NamedDecl *D, 3986 const PartialDiagnostic &PDiag); 3987 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3988 Expr *ObjectExpr, 3989 Expr *ArgExpr, 3990 DeclAccessPair FoundDecl); 3991 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3992 DeclAccessPair FoundDecl); 3993 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3994 QualType Base, QualType Derived, 3995 const CXXBasePath &Path, 3996 unsigned DiagID, 3997 bool ForceCheck = false, 3998 bool ForceUnprivileged = false); 3999 void CheckLookupAccess(const LookupResult &R); 4000 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 4001 4002 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 4003 const MultiLevelTemplateArgumentList &TemplateArgs); 4004 void PerformDependentDiagnostics(const DeclContext *Pattern, 4005 const MultiLevelTemplateArgumentList &TemplateArgs); 4006 4007 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4008 4009 /// A flag to suppress access checking. 4010 bool SuppressAccessChecking; 4011 4012 /// \brief When true, access checking violations are treated as SFINAE 4013 /// failures rather than hard errors. 4014 bool AccessCheckingSFINAE; 4015 4016 void ActOnStartSuppressingAccessChecks(); 4017 void ActOnStopSuppressingAccessChecks(); 4018 4019 enum AbstractDiagSelID { 4020 AbstractNone = -1, 4021 AbstractReturnType, 4022 AbstractParamType, 4023 AbstractVariableType, 4024 AbstractFieldType, 4025 AbstractArrayType 4026 }; 4027 4028 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4029 const PartialDiagnostic &PD); 4030 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4031 4032 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4033 AbstractDiagSelID SelID = AbstractNone); 4034 4035 //===--------------------------------------------------------------------===// 4036 // C++ Overloaded Operators [C++ 13.5] 4037 // 4038 4039 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4040 4041 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4042 4043 //===--------------------------------------------------------------------===// 4044 // C++ Templates [C++ 14] 4045 // 4046 void FilterAcceptableTemplateNames(LookupResult &R); 4047 bool hasAnyAcceptableTemplateNames(LookupResult &R); 4048 4049 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4050 QualType ObjectType, bool EnteringContext, 4051 bool &MemberOfUnknownSpecialization); 4052 4053 TemplateNameKind isTemplateName(Scope *S, 4054 CXXScopeSpec &SS, 4055 bool hasTemplateKeyword, 4056 UnqualifiedId &Name, 4057 ParsedType ObjectType, 4058 bool EnteringContext, 4059 TemplateTy &Template, 4060 bool &MemberOfUnknownSpecialization); 4061 4062 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4063 SourceLocation IILoc, 4064 Scope *S, 4065 const CXXScopeSpec *SS, 4066 TemplateTy &SuggestedTemplate, 4067 TemplateNameKind &SuggestedKind); 4068 4069 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4070 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4071 4072 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4073 SourceLocation EllipsisLoc, 4074 SourceLocation KeyLoc, 4075 IdentifierInfo *ParamName, 4076 SourceLocation ParamNameLoc, 4077 unsigned Depth, unsigned Position, 4078 SourceLocation EqualLoc, 4079 ParsedType DefaultArg); 4080 4081 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4082 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4083 unsigned Depth, 4084 unsigned Position, 4085 SourceLocation EqualLoc, 4086 Expr *DefaultArg); 4087 Decl *ActOnTemplateTemplateParameter(Scope *S, 4088 SourceLocation TmpLoc, 4089 TemplateParameterList *Params, 4090 SourceLocation EllipsisLoc, 4091 IdentifierInfo *ParamName, 4092 SourceLocation ParamNameLoc, 4093 unsigned Depth, 4094 unsigned Position, 4095 SourceLocation EqualLoc, 4096 ParsedTemplateArgument DefaultArg); 4097 4098 TemplateParameterList * 4099 ActOnTemplateParameterList(unsigned Depth, 4100 SourceLocation ExportLoc, 4101 SourceLocation TemplateLoc, 4102 SourceLocation LAngleLoc, 4103 Decl **Params, unsigned NumParams, 4104 SourceLocation RAngleLoc); 4105 4106 /// \brief The context in which we are checking a template parameter 4107 /// list. 4108 enum TemplateParamListContext { 4109 TPC_ClassTemplate, 4110 TPC_FunctionTemplate, 4111 TPC_ClassTemplateMember, 4112 TPC_FriendFunctionTemplate, 4113 TPC_FriendFunctionTemplateDefinition, 4114 TPC_TypeAliasTemplate 4115 }; 4116 4117 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4118 TemplateParameterList *OldParams, 4119 TemplateParamListContext TPC); 4120 TemplateParameterList * 4121 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4122 SourceLocation DeclLoc, 4123 const CXXScopeSpec &SS, 4124 TemplateParameterList **ParamLists, 4125 unsigned NumParamLists, 4126 bool IsFriend, 4127 bool &IsExplicitSpecialization, 4128 bool &Invalid); 4129 4130 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4131 SourceLocation KWLoc, CXXScopeSpec &SS, 4132 IdentifierInfo *Name, SourceLocation NameLoc, 4133 AttributeList *Attr, 4134 TemplateParameterList *TemplateParams, 4135 AccessSpecifier AS, 4136 SourceLocation ModulePrivateLoc, 4137 unsigned NumOuterTemplateParamLists, 4138 TemplateParameterList **OuterTemplateParamLists); 4139 4140 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4141 TemplateArgumentListInfo &Out); 4142 4143 void NoteAllFoundTemplates(TemplateName Name); 4144 4145 QualType CheckTemplateIdType(TemplateName Template, 4146 SourceLocation TemplateLoc, 4147 TemplateArgumentListInfo &TemplateArgs); 4148 4149 TypeResult 4150 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4151 TemplateTy Template, SourceLocation TemplateLoc, 4152 SourceLocation LAngleLoc, 4153 ASTTemplateArgsPtr TemplateArgs, 4154 SourceLocation RAngleLoc, 4155 bool IsCtorOrDtorName = false); 4156 4157 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4158 /// such as \c class T::template apply<U>. 4159 /// 4160 /// \param TUK 4161 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4162 TypeSpecifierType TagSpec, 4163 SourceLocation TagLoc, 4164 CXXScopeSpec &SS, 4165 SourceLocation TemplateKWLoc, 4166 TemplateTy TemplateD, 4167 SourceLocation TemplateLoc, 4168 SourceLocation LAngleLoc, 4169 ASTTemplateArgsPtr TemplateArgsIn, 4170 SourceLocation RAngleLoc); 4171 4172 4173 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4174 SourceLocation TemplateKWLoc, 4175 LookupResult &R, 4176 bool RequiresADL, 4177 const TemplateArgumentListInfo *TemplateArgs); 4178 4179 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4180 SourceLocation TemplateKWLoc, 4181 const DeclarationNameInfo &NameInfo, 4182 const TemplateArgumentListInfo *TemplateArgs); 4183 4184 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4185 CXXScopeSpec &SS, 4186 SourceLocation TemplateKWLoc, 4187 UnqualifiedId &Name, 4188 ParsedType ObjectType, 4189 bool EnteringContext, 4190 TemplateTy &Template); 4191 4192 DeclResult 4193 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4194 SourceLocation KWLoc, 4195 SourceLocation ModulePrivateLoc, 4196 CXXScopeSpec &SS, 4197 TemplateTy Template, 4198 SourceLocation TemplateNameLoc, 4199 SourceLocation LAngleLoc, 4200 ASTTemplateArgsPtr TemplateArgs, 4201 SourceLocation RAngleLoc, 4202 AttributeList *Attr, 4203 MultiTemplateParamsArg TemplateParameterLists); 4204 4205 Decl *ActOnTemplateDeclarator(Scope *S, 4206 MultiTemplateParamsArg TemplateParameterLists, 4207 Declarator &D); 4208 4209 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4210 MultiTemplateParamsArg TemplateParameterLists, 4211 Declarator &D); 4212 4213 bool 4214 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4215 TemplateSpecializationKind NewTSK, 4216 NamedDecl *PrevDecl, 4217 TemplateSpecializationKind PrevTSK, 4218 SourceLocation PrevPtOfInstantiation, 4219 bool &SuppressNew); 4220 4221 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4222 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4223 LookupResult &Previous); 4224 4225 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4226 TemplateArgumentListInfo *ExplicitTemplateArgs, 4227 LookupResult &Previous); 4228 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4229 4230 DeclResult 4231 ActOnExplicitInstantiation(Scope *S, 4232 SourceLocation ExternLoc, 4233 SourceLocation TemplateLoc, 4234 unsigned TagSpec, 4235 SourceLocation KWLoc, 4236 const CXXScopeSpec &SS, 4237 TemplateTy Template, 4238 SourceLocation TemplateNameLoc, 4239 SourceLocation LAngleLoc, 4240 ASTTemplateArgsPtr TemplateArgs, 4241 SourceLocation RAngleLoc, 4242 AttributeList *Attr); 4243 4244 DeclResult 4245 ActOnExplicitInstantiation(Scope *S, 4246 SourceLocation ExternLoc, 4247 SourceLocation TemplateLoc, 4248 unsigned TagSpec, 4249 SourceLocation KWLoc, 4250 CXXScopeSpec &SS, 4251 IdentifierInfo *Name, 4252 SourceLocation NameLoc, 4253 AttributeList *Attr); 4254 4255 DeclResult ActOnExplicitInstantiation(Scope *S, 4256 SourceLocation ExternLoc, 4257 SourceLocation TemplateLoc, 4258 Declarator &D); 4259 4260 TemplateArgumentLoc 4261 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4262 SourceLocation TemplateLoc, 4263 SourceLocation RAngleLoc, 4264 Decl *Param, 4265 SmallVectorImpl<TemplateArgument> &Converted); 4266 4267 /// \brief Specifies the context in which a particular template 4268 /// argument is being checked. 4269 enum CheckTemplateArgumentKind { 4270 /// \brief The template argument was specified in the code or was 4271 /// instantiated with some deduced template arguments. 4272 CTAK_Specified, 4273 4274 /// \brief The template argument was deduced via template argument 4275 /// deduction. 4276 CTAK_Deduced, 4277 4278 /// \brief The template argument was deduced from an array bound 4279 /// via template argument deduction. 4280 CTAK_DeducedFromArrayBound 4281 }; 4282 4283 bool CheckTemplateArgument(NamedDecl *Param, 4284 const TemplateArgumentLoc &Arg, 4285 NamedDecl *Template, 4286 SourceLocation TemplateLoc, 4287 SourceLocation RAngleLoc, 4288 unsigned ArgumentPackIndex, 4289 SmallVectorImpl<TemplateArgument> &Converted, 4290 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4291 4292 /// \brief Check that the given template arguments can be be provided to 4293 /// the given template, converting the arguments along the way. 4294 /// 4295 /// \param Template The template to which the template arguments are being 4296 /// provided. 4297 /// 4298 /// \param TemplateLoc The location of the template name in the source. 4299 /// 4300 /// \param TemplateArgs The list of template arguments. If the template is 4301 /// a template template parameter, this function may extend the set of 4302 /// template arguments to also include substituted, defaulted template 4303 /// arguments. 4304 /// 4305 /// \param PartialTemplateArgs True if the list of template arguments is 4306 /// intentionally partial, e.g., because we're checking just the initial 4307 /// set of template arguments. 4308 /// 4309 /// \param Converted Will receive the converted, canonicalized template 4310 /// arguments. 4311 /// 4312 /// 4313 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4314 /// when the template arguments contain a pack expansion that is being 4315 /// expanded into a fixed parameter list. 4316 /// 4317 /// \returns True if an error occurred, false otherwise. 4318 bool CheckTemplateArgumentList(TemplateDecl *Template, 4319 SourceLocation TemplateLoc, 4320 TemplateArgumentListInfo &TemplateArgs, 4321 bool PartialTemplateArgs, 4322 SmallVectorImpl<TemplateArgument> &Converted, 4323 bool *ExpansionIntoFixedList = 0); 4324 4325 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4326 const TemplateArgumentLoc &Arg, 4327 SmallVectorImpl<TemplateArgument> &Converted); 4328 4329 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4330 TypeSourceInfo *Arg); 4331 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4332 TemplateArgument &Converted); 4333 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4334 QualType InstantiatedParamType, Expr *Arg, 4335 TemplateArgument &Converted, 4336 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4337 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4338 const TemplateArgumentLoc &Arg); 4339 4340 ExprResult 4341 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4342 QualType ParamType, 4343 SourceLocation Loc); 4344 ExprResult 4345 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4346 SourceLocation Loc); 4347 4348 /// \brief Enumeration describing how template parameter lists are compared 4349 /// for equality. 4350 enum TemplateParameterListEqualKind { 4351 /// \brief We are matching the template parameter lists of two templates 4352 /// that might be redeclarations. 4353 /// 4354 /// \code 4355 /// template<typename T> struct X; 4356 /// template<typename T> struct X; 4357 /// \endcode 4358 TPL_TemplateMatch, 4359 4360 /// \brief We are matching the template parameter lists of two template 4361 /// template parameters as part of matching the template parameter lists 4362 /// of two templates that might be redeclarations. 4363 /// 4364 /// \code 4365 /// template<template<int I> class TT> struct X; 4366 /// template<template<int Value> class Other> struct X; 4367 /// \endcode 4368 TPL_TemplateTemplateParmMatch, 4369 4370 /// \brief We are matching the template parameter lists of a template 4371 /// template argument against the template parameter lists of a template 4372 /// template parameter. 4373 /// 4374 /// \code 4375 /// template<template<int Value> class Metafun> struct X; 4376 /// template<int Value> struct integer_c; 4377 /// X<integer_c> xic; 4378 /// \endcode 4379 TPL_TemplateTemplateArgumentMatch 4380 }; 4381 4382 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4383 TemplateParameterList *Old, 4384 bool Complain, 4385 TemplateParameterListEqualKind Kind, 4386 SourceLocation TemplateArgLoc 4387 = SourceLocation()); 4388 4389 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4390 4391 /// \brief Called when the parser has parsed a C++ typename 4392 /// specifier, e.g., "typename T::type". 4393 /// 4394 /// \param S The scope in which this typename type occurs. 4395 /// \param TypenameLoc the location of the 'typename' keyword 4396 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4397 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4398 /// \param IdLoc the location of the identifier. 4399 TypeResult 4400 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4401 const CXXScopeSpec &SS, const IdentifierInfo &II, 4402 SourceLocation IdLoc); 4403 4404 /// \brief Called when the parser has parsed a C++ typename 4405 /// specifier that ends in a template-id, e.g., 4406 /// "typename MetaFun::template apply<T1, T2>". 4407 /// 4408 /// \param S The scope in which this typename type occurs. 4409 /// \param TypenameLoc the location of the 'typename' keyword 4410 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4411 /// \param TemplateLoc the location of the 'template' keyword, if any. 4412 /// \param TemplateName The template name. 4413 /// \param TemplateNameLoc The location of the template name. 4414 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4415 /// \param TemplateArgs The template arguments. 4416 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4417 TypeResult 4418 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4419 const CXXScopeSpec &SS, 4420 SourceLocation TemplateLoc, 4421 TemplateTy Template, 4422 SourceLocation TemplateNameLoc, 4423 SourceLocation LAngleLoc, 4424 ASTTemplateArgsPtr TemplateArgs, 4425 SourceLocation RAngleLoc); 4426 4427 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4428 SourceLocation KeywordLoc, 4429 NestedNameSpecifierLoc QualifierLoc, 4430 const IdentifierInfo &II, 4431 SourceLocation IILoc); 4432 4433 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4434 SourceLocation Loc, 4435 DeclarationName Name); 4436 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4437 4438 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4439 bool RebuildTemplateParamsInCurrentInstantiation( 4440 TemplateParameterList *Params); 4441 4442 std::string 4443 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4444 const TemplateArgumentList &Args); 4445 4446 std::string 4447 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4448 const TemplateArgument *Args, 4449 unsigned NumArgs); 4450 4451 //===--------------------------------------------------------------------===// 4452 // C++ Variadic Templates (C++0x [temp.variadic]) 4453 //===--------------------------------------------------------------------===// 4454 4455 /// \brief The context in which an unexpanded parameter pack is 4456 /// being diagnosed. 4457 /// 4458 /// Note that the values of this enumeration line up with the first 4459 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4460 enum UnexpandedParameterPackContext { 4461 /// \brief An arbitrary expression. 4462 UPPC_Expression = 0, 4463 4464 /// \brief The base type of a class type. 4465 UPPC_BaseType, 4466 4467 /// \brief The type of an arbitrary declaration. 4468 UPPC_DeclarationType, 4469 4470 /// \brief The type of a data member. 4471 UPPC_DataMemberType, 4472 4473 /// \brief The size of a bit-field. 4474 UPPC_BitFieldWidth, 4475 4476 /// \brief The expression in a static assertion. 4477 UPPC_StaticAssertExpression, 4478 4479 /// \brief The fixed underlying type of an enumeration. 4480 UPPC_FixedUnderlyingType, 4481 4482 /// \brief The enumerator value. 4483 UPPC_EnumeratorValue, 4484 4485 /// \brief A using declaration. 4486 UPPC_UsingDeclaration, 4487 4488 /// \brief A friend declaration. 4489 UPPC_FriendDeclaration, 4490 4491 /// \brief A declaration qualifier. 4492 UPPC_DeclarationQualifier, 4493 4494 /// \brief An initializer. 4495 UPPC_Initializer, 4496 4497 /// \brief A default argument. 4498 UPPC_DefaultArgument, 4499 4500 /// \brief The type of a non-type template parameter. 4501 UPPC_NonTypeTemplateParameterType, 4502 4503 /// \brief The type of an exception. 4504 UPPC_ExceptionType, 4505 4506 /// \brief Partial specialization. 4507 UPPC_PartialSpecialization, 4508 4509 /// \brief Microsoft __if_exists. 4510 UPPC_IfExists, 4511 4512 /// \brief Microsoft __if_not_exists. 4513 UPPC_IfNotExists 4514}; 4515 4516 /// \brief Diagnose unexpanded parameter packs. 4517 /// 4518 /// \param Loc The location at which we should emit the diagnostic. 4519 /// 4520 /// \param UPPC The context in which we are diagnosing unexpanded 4521 /// parameter packs. 4522 /// 4523 /// \param Unexpanded the set of unexpanded parameter packs. 4524 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4525 UnexpandedParameterPackContext UPPC, 4526 ArrayRef<UnexpandedParameterPack> Unexpanded); 4527 4528 /// \brief If the given type contains an unexpanded parameter pack, 4529 /// diagnose the error. 4530 /// 4531 /// \param Loc The source location where a diagnostc should be emitted. 4532 /// 4533 /// \param T The type that is being checked for unexpanded parameter 4534 /// packs. 4535 /// 4536 /// \returns true if an error occurred, false otherwise. 4537 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4538 UnexpandedParameterPackContext UPPC); 4539 4540 /// \brief If the given expression contains an unexpanded parameter 4541 /// pack, diagnose the error. 4542 /// 4543 /// \param E The expression that is being checked for unexpanded 4544 /// parameter packs. 4545 /// 4546 /// \returns true if an error occurred, false otherwise. 4547 bool DiagnoseUnexpandedParameterPack(Expr *E, 4548 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4549 4550 /// \brief If the given nested-name-specifier contains an unexpanded 4551 /// parameter pack, diagnose the error. 4552 /// 4553 /// \param SS The nested-name-specifier that is being checked for 4554 /// unexpanded parameter packs. 4555 /// 4556 /// \returns true if an error occurred, false otherwise. 4557 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4558 UnexpandedParameterPackContext UPPC); 4559 4560 /// \brief If the given name contains an unexpanded parameter pack, 4561 /// diagnose the error. 4562 /// 4563 /// \param NameInfo The name (with source location information) that 4564 /// is being checked for unexpanded parameter packs. 4565 /// 4566 /// \returns true if an error occurred, false otherwise. 4567 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4568 UnexpandedParameterPackContext UPPC); 4569 4570 /// \brief If the given template name contains an unexpanded parameter pack, 4571 /// diagnose the error. 4572 /// 4573 /// \param Loc The location of the template name. 4574 /// 4575 /// \param Template The template name that is being checked for unexpanded 4576 /// parameter packs. 4577 /// 4578 /// \returns true if an error occurred, false otherwise. 4579 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4580 TemplateName Template, 4581 UnexpandedParameterPackContext UPPC); 4582 4583 /// \brief If the given template argument contains an unexpanded parameter 4584 /// pack, diagnose the error. 4585 /// 4586 /// \param Arg The template argument that is being checked for unexpanded 4587 /// parameter packs. 4588 /// 4589 /// \returns true if an error occurred, false otherwise. 4590 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4591 UnexpandedParameterPackContext UPPC); 4592 4593 /// \brief Collect the set of unexpanded parameter packs within the given 4594 /// template argument. 4595 /// 4596 /// \param Arg The template argument that will be traversed to find 4597 /// unexpanded parameter packs. 4598 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4599 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4600 4601 /// \brief Collect the set of unexpanded parameter packs within the given 4602 /// template argument. 4603 /// 4604 /// \param Arg The template argument that will be traversed to find 4605 /// unexpanded parameter packs. 4606 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4607 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4608 4609 /// \brief Collect the set of unexpanded parameter packs within the given 4610 /// type. 4611 /// 4612 /// \param T The type that will be traversed to find 4613 /// unexpanded parameter packs. 4614 void collectUnexpandedParameterPacks(QualType T, 4615 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4616 4617 /// \brief Collect the set of unexpanded parameter packs within the given 4618 /// type. 4619 /// 4620 /// \param TL The type that will be traversed to find 4621 /// unexpanded parameter packs. 4622 void collectUnexpandedParameterPacks(TypeLoc TL, 4623 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4624 4625 /// \brief Collect the set of unexpanded parameter packs within the given 4626 /// nested-name-specifier. 4627 /// 4628 /// \param SS The nested-name-specifier that will be traversed to find 4629 /// unexpanded parameter packs. 4630 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4631 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4632 4633 /// \brief Collect the set of unexpanded parameter packs within the given 4634 /// name. 4635 /// 4636 /// \param NameInfo The name that will be traversed to find 4637 /// unexpanded parameter packs. 4638 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4639 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4640 4641 /// \brief Invoked when parsing a template argument followed by an 4642 /// ellipsis, which creates a pack expansion. 4643 /// 4644 /// \param Arg The template argument preceding the ellipsis, which 4645 /// may already be invalid. 4646 /// 4647 /// \param EllipsisLoc The location of the ellipsis. 4648 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4649 SourceLocation EllipsisLoc); 4650 4651 /// \brief Invoked when parsing a type followed by an ellipsis, which 4652 /// creates a pack expansion. 4653 /// 4654 /// \param Type The type preceding the ellipsis, which will become 4655 /// the pattern of the pack expansion. 4656 /// 4657 /// \param EllipsisLoc The location of the ellipsis. 4658 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4659 4660 /// \brief Construct a pack expansion type from the pattern of the pack 4661 /// expansion. 4662 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4663 SourceLocation EllipsisLoc, 4664 llvm::Optional<unsigned> NumExpansions); 4665 4666 /// \brief Construct a pack expansion type from the pattern of the pack 4667 /// expansion. 4668 QualType CheckPackExpansion(QualType Pattern, 4669 SourceRange PatternRange, 4670 SourceLocation EllipsisLoc, 4671 llvm::Optional<unsigned> NumExpansions); 4672 4673 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4674 /// creates a pack expansion. 4675 /// 4676 /// \param Pattern The expression preceding the ellipsis, which will become 4677 /// the pattern of the pack expansion. 4678 /// 4679 /// \param EllipsisLoc The location of the ellipsis. 4680 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4681 4682 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4683 /// creates a pack expansion. 4684 /// 4685 /// \param Pattern The expression preceding the ellipsis, which will become 4686 /// the pattern of the pack expansion. 4687 /// 4688 /// \param EllipsisLoc The location of the ellipsis. 4689 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4690 llvm::Optional<unsigned> NumExpansions); 4691 4692 /// \brief Determine whether we could expand a pack expansion with the 4693 /// given set of parameter packs into separate arguments by repeatedly 4694 /// transforming the pattern. 4695 /// 4696 /// \param EllipsisLoc The location of the ellipsis that identifies the 4697 /// pack expansion. 4698 /// 4699 /// \param PatternRange The source range that covers the entire pattern of 4700 /// the pack expansion. 4701 /// 4702 /// \param Unexpanded The set of unexpanded parameter packs within the 4703 /// pattern. 4704 /// 4705 /// \param NumUnexpanded The number of unexpanded parameter packs in 4706 /// \p Unexpanded. 4707 /// 4708 /// \param ShouldExpand Will be set to \c true if the transformer should 4709 /// expand the corresponding pack expansions into separate arguments. When 4710 /// set, \c NumExpansions must also be set. 4711 /// 4712 /// \param RetainExpansion Whether the caller should add an unexpanded 4713 /// pack expansion after all of the expanded arguments. This is used 4714 /// when extending explicitly-specified template argument packs per 4715 /// C++0x [temp.arg.explicit]p9. 4716 /// 4717 /// \param NumExpansions The number of separate arguments that will be in 4718 /// the expanded form of the corresponding pack expansion. This is both an 4719 /// input and an output parameter, which can be set by the caller if the 4720 /// number of expansions is known a priori (e.g., due to a prior substitution) 4721 /// and will be set by the callee when the number of expansions is known. 4722 /// The callee must set this value when \c ShouldExpand is \c true; it may 4723 /// set this value in other cases. 4724 /// 4725 /// \returns true if an error occurred (e.g., because the parameter packs 4726 /// are to be instantiated with arguments of different lengths), false 4727 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4728 /// must be set. 4729 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4730 SourceRange PatternRange, 4731 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4732 const MultiLevelTemplateArgumentList &TemplateArgs, 4733 bool &ShouldExpand, 4734 bool &RetainExpansion, 4735 llvm::Optional<unsigned> &NumExpansions); 4736 4737 /// \brief Determine the number of arguments in the given pack expansion 4738 /// type. 4739 /// 4740 /// This routine already assumes that the pack expansion type can be 4741 /// expanded and that the number of arguments in the expansion is 4742 /// consistent across all of the unexpanded parameter packs in its pattern. 4743 unsigned getNumArgumentsInExpansion(QualType T, 4744 const MultiLevelTemplateArgumentList &TemplateArgs); 4745 4746 /// \brief Determine whether the given declarator contains any unexpanded 4747 /// parameter packs. 4748 /// 4749 /// This routine is used by the parser to disambiguate function declarators 4750 /// with an ellipsis prior to the ')', e.g., 4751 /// 4752 /// \code 4753 /// void f(T...); 4754 /// \endcode 4755 /// 4756 /// To determine whether we have an (unnamed) function parameter pack or 4757 /// a variadic function. 4758 /// 4759 /// \returns true if the declarator contains any unexpanded parameter packs, 4760 /// false otherwise. 4761 bool containsUnexpandedParameterPacks(Declarator &D); 4762 4763 //===--------------------------------------------------------------------===// 4764 // C++ Template Argument Deduction (C++ [temp.deduct]) 4765 //===--------------------------------------------------------------------===// 4766 4767 /// \brief Describes the result of template argument deduction. 4768 /// 4769 /// The TemplateDeductionResult enumeration describes the result of 4770 /// template argument deduction, as returned from 4771 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4772 /// structure provides additional information about the results of 4773 /// template argument deduction, e.g., the deduced template argument 4774 /// list (if successful) or the specific template parameters or 4775 /// deduced arguments that were involved in the failure. 4776 enum TemplateDeductionResult { 4777 /// \brief Template argument deduction was successful. 4778 TDK_Success = 0, 4779 /// \brief Template argument deduction exceeded the maximum template 4780 /// instantiation depth (which has already been diagnosed). 4781 TDK_InstantiationDepth, 4782 /// \brief Template argument deduction did not deduce a value 4783 /// for every template parameter. 4784 TDK_Incomplete, 4785 /// \brief Template argument deduction produced inconsistent 4786 /// deduced values for the given template parameter. 4787 TDK_Inconsistent, 4788 /// \brief Template argument deduction failed due to inconsistent 4789 /// cv-qualifiers on a template parameter type that would 4790 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4791 /// but were given a non-const "X". 4792 TDK_Underqualified, 4793 /// \brief Substitution of the deduced template argument values 4794 /// resulted in an error. 4795 TDK_SubstitutionFailure, 4796 /// \brief Substitution of the deduced template argument values 4797 /// into a non-deduced context produced a type or value that 4798 /// produces a type that does not match the original template 4799 /// arguments provided. 4800 TDK_NonDeducedMismatch, 4801 /// \brief When performing template argument deduction for a function 4802 /// template, there were too many call arguments. 4803 TDK_TooManyArguments, 4804 /// \brief When performing template argument deduction for a function 4805 /// template, there were too few call arguments. 4806 TDK_TooFewArguments, 4807 /// \brief The explicitly-specified template arguments were not valid 4808 /// template arguments for the given template. 4809 TDK_InvalidExplicitArguments, 4810 /// \brief The arguments included an overloaded function name that could 4811 /// not be resolved to a suitable function. 4812 TDK_FailedOverloadResolution 4813 }; 4814 4815 TemplateDeductionResult 4816 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4817 const TemplateArgumentList &TemplateArgs, 4818 sema::TemplateDeductionInfo &Info); 4819 4820 TemplateDeductionResult 4821 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4822 TemplateArgumentListInfo &ExplicitTemplateArgs, 4823 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4824 SmallVectorImpl<QualType> &ParamTypes, 4825 QualType *FunctionType, 4826 sema::TemplateDeductionInfo &Info); 4827 4828 /// brief A function argument from which we performed template argument 4829 // deduction for a call. 4830 struct OriginalCallArg { 4831 OriginalCallArg(QualType OriginalParamType, 4832 unsigned ArgIdx, 4833 QualType OriginalArgType) 4834 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4835 OriginalArgType(OriginalArgType) { } 4836 4837 QualType OriginalParamType; 4838 unsigned ArgIdx; 4839 QualType OriginalArgType; 4840 }; 4841 4842 TemplateDeductionResult 4843 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4844 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4845 unsigned NumExplicitlySpecified, 4846 FunctionDecl *&Specialization, 4847 sema::TemplateDeductionInfo &Info, 4848 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4849 4850 TemplateDeductionResult 4851 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4852 TemplateArgumentListInfo *ExplicitTemplateArgs, 4853 llvm::ArrayRef<Expr *> Args, 4854 FunctionDecl *&Specialization, 4855 sema::TemplateDeductionInfo &Info); 4856 4857 TemplateDeductionResult 4858 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4859 TemplateArgumentListInfo *ExplicitTemplateArgs, 4860 QualType ArgFunctionType, 4861 FunctionDecl *&Specialization, 4862 sema::TemplateDeductionInfo &Info); 4863 4864 TemplateDeductionResult 4865 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4866 QualType ToType, 4867 CXXConversionDecl *&Specialization, 4868 sema::TemplateDeductionInfo &Info); 4869 4870 TemplateDeductionResult 4871 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4872 TemplateArgumentListInfo *ExplicitTemplateArgs, 4873 FunctionDecl *&Specialization, 4874 sema::TemplateDeductionInfo &Info); 4875 4876 /// \brief Result type of DeduceAutoType. 4877 enum DeduceAutoResult { 4878 DAR_Succeeded, 4879 DAR_Failed, 4880 DAR_FailedAlreadyDiagnosed 4881 }; 4882 4883 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4884 TypeSourceInfo *&Result); 4885 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4886 4887 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4888 FunctionTemplateDecl *FT2, 4889 SourceLocation Loc, 4890 TemplatePartialOrderingContext TPOC, 4891 unsigned NumCallArguments); 4892 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4893 UnresolvedSetIterator SEnd, 4894 TemplatePartialOrderingContext TPOC, 4895 unsigned NumCallArguments, 4896 SourceLocation Loc, 4897 const PartialDiagnostic &NoneDiag, 4898 const PartialDiagnostic &AmbigDiag, 4899 const PartialDiagnostic &CandidateDiag, 4900 bool Complain = true, 4901 QualType TargetType = QualType()); 4902 4903 ClassTemplatePartialSpecializationDecl * 4904 getMoreSpecializedPartialSpecialization( 4905 ClassTemplatePartialSpecializationDecl *PS1, 4906 ClassTemplatePartialSpecializationDecl *PS2, 4907 SourceLocation Loc); 4908 4909 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4910 bool OnlyDeduced, 4911 unsigned Depth, 4912 llvm::SmallBitVector &Used); 4913 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4914 llvm::SmallBitVector &Deduced) { 4915 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4916 } 4917 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4918 FunctionTemplateDecl *FunctionTemplate, 4919 llvm::SmallBitVector &Deduced); 4920 4921 //===--------------------------------------------------------------------===// 4922 // C++ Template Instantiation 4923 // 4924 4925 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4926 const TemplateArgumentList *Innermost = 0, 4927 bool RelativeToPrimary = false, 4928 const FunctionDecl *Pattern = 0); 4929 4930 /// \brief A template instantiation that is currently in progress. 4931 struct ActiveTemplateInstantiation { 4932 /// \brief The kind of template instantiation we are performing 4933 enum InstantiationKind { 4934 /// We are instantiating a template declaration. The entity is 4935 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4936 TemplateInstantiation, 4937 4938 /// We are instantiating a default argument for a template 4939 /// parameter. The Entity is the template, and 4940 /// TemplateArgs/NumTemplateArguments provides the template 4941 /// arguments as specified. 4942 /// FIXME: Use a TemplateArgumentList 4943 DefaultTemplateArgumentInstantiation, 4944 4945 /// We are instantiating a default argument for a function. 4946 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4947 /// provides the template arguments as specified. 4948 DefaultFunctionArgumentInstantiation, 4949 4950 /// We are substituting explicit template arguments provided for 4951 /// a function template. The entity is a FunctionTemplateDecl. 4952 ExplicitTemplateArgumentSubstitution, 4953 4954 /// We are substituting template argument determined as part of 4955 /// template argument deduction for either a class template 4956 /// partial specialization or a function template. The 4957 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4958 /// a FunctionTemplateDecl. 4959 DeducedTemplateArgumentSubstitution, 4960 4961 /// We are substituting prior template arguments into a new 4962 /// template parameter. The template parameter itself is either a 4963 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4964 PriorTemplateArgumentSubstitution, 4965 4966 /// We are checking the validity of a default template argument that 4967 /// has been used when naming a template-id. 4968 DefaultTemplateArgumentChecking 4969 } Kind; 4970 4971 /// \brief The point of instantiation within the source code. 4972 SourceLocation PointOfInstantiation; 4973 4974 /// \brief The template (or partial specialization) in which we are 4975 /// performing the instantiation, for substitutions of prior template 4976 /// arguments. 4977 NamedDecl *Template; 4978 4979 /// \brief The entity that is being instantiated. 4980 uintptr_t Entity; 4981 4982 /// \brief The list of template arguments we are substituting, if they 4983 /// are not part of the entity. 4984 const TemplateArgument *TemplateArgs; 4985 4986 /// \brief The number of template arguments in TemplateArgs. 4987 unsigned NumTemplateArgs; 4988 4989 /// \brief The template deduction info object associated with the 4990 /// substitution or checking of explicit or deduced template arguments. 4991 sema::TemplateDeductionInfo *DeductionInfo; 4992 4993 /// \brief The source range that covers the construct that cause 4994 /// the instantiation, e.g., the template-id that causes a class 4995 /// template instantiation. 4996 SourceRange InstantiationRange; 4997 4998 ActiveTemplateInstantiation() 4999 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 5000 NumTemplateArgs(0), DeductionInfo(0) {} 5001 5002 /// \brief Determines whether this template is an actual instantiation 5003 /// that should be counted toward the maximum instantiation depth. 5004 bool isInstantiationRecord() const; 5005 5006 friend bool operator==(const ActiveTemplateInstantiation &X, 5007 const ActiveTemplateInstantiation &Y) { 5008 if (X.Kind != Y.Kind) 5009 return false; 5010 5011 if (X.Entity != Y.Entity) 5012 return false; 5013 5014 switch (X.Kind) { 5015 case TemplateInstantiation: 5016 return true; 5017 5018 case PriorTemplateArgumentSubstitution: 5019 case DefaultTemplateArgumentChecking: 5020 if (X.Template != Y.Template) 5021 return false; 5022 5023 // Fall through 5024 5025 case DefaultTemplateArgumentInstantiation: 5026 case ExplicitTemplateArgumentSubstitution: 5027 case DeducedTemplateArgumentSubstitution: 5028 case DefaultFunctionArgumentInstantiation: 5029 return X.TemplateArgs == Y.TemplateArgs; 5030 5031 } 5032 5033 llvm_unreachable("Invalid InstantiationKind!"); 5034 } 5035 5036 friend bool operator!=(const ActiveTemplateInstantiation &X, 5037 const ActiveTemplateInstantiation &Y) { 5038 return !(X == Y); 5039 } 5040 }; 5041 5042 /// \brief List of active template instantiations. 5043 /// 5044 /// This vector is treated as a stack. As one template instantiation 5045 /// requires another template instantiation, additional 5046 /// instantiations are pushed onto the stack up to a 5047 /// user-configurable limit LangOptions::InstantiationDepth. 5048 SmallVector<ActiveTemplateInstantiation, 16> 5049 ActiveTemplateInstantiations; 5050 5051 /// \brief Whether we are in a SFINAE context that is not associated with 5052 /// template instantiation. 5053 /// 5054 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5055 /// of a template instantiation or template argument deduction. 5056 bool InNonInstantiationSFINAEContext; 5057 5058 /// \brief The number of ActiveTemplateInstantiation entries in 5059 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5060 /// therefore, should not be counted as part of the instantiation depth. 5061 unsigned NonInstantiationEntries; 5062 5063 /// \brief The last template from which a template instantiation 5064 /// error or warning was produced. 5065 /// 5066 /// This value is used to suppress printing of redundant template 5067 /// instantiation backtraces when there are multiple errors in the 5068 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5069 /// to implement it anywhere else. 5070 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5071 5072 /// \brief The current index into pack expansion arguments that will be 5073 /// used for substitution of parameter packs. 5074 /// 5075 /// The pack expansion index will be -1 to indicate that parameter packs 5076 /// should be instantiated as themselves. Otherwise, the index specifies 5077 /// which argument within the parameter pack will be used for substitution. 5078 int ArgumentPackSubstitutionIndex; 5079 5080 /// \brief RAII object used to change the argument pack substitution index 5081 /// within a \c Sema object. 5082 /// 5083 /// See \c ArgumentPackSubstitutionIndex for more information. 5084 class ArgumentPackSubstitutionIndexRAII { 5085 Sema &Self; 5086 int OldSubstitutionIndex; 5087 5088 public: 5089 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5090 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5091 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5092 } 5093 5094 ~ArgumentPackSubstitutionIndexRAII() { 5095 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5096 } 5097 }; 5098 5099 friend class ArgumentPackSubstitutionRAII; 5100 5101 /// \brief The stack of calls expression undergoing template instantiation. 5102 /// 5103 /// The top of this stack is used by a fixit instantiating unresolved 5104 /// function calls to fix the AST to match the textual change it prints. 5105 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5106 5107 /// \brief For each declaration that involved template argument deduction, the 5108 /// set of diagnostics that were suppressed during that template argument 5109 /// deduction. 5110 /// 5111 /// FIXME: Serialize this structure to the AST file. 5112 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5113 SuppressedDiagnostics; 5114 5115 /// \brief A stack object to be created when performing template 5116 /// instantiation. 5117 /// 5118 /// Construction of an object of type \c InstantiatingTemplate 5119 /// pushes the current instantiation onto the stack of active 5120 /// instantiations. If the size of this stack exceeds the maximum 5121 /// number of recursive template instantiations, construction 5122 /// produces an error and evaluates true. 5123 /// 5124 /// Destruction of this object will pop the named instantiation off 5125 /// the stack. 5126 struct InstantiatingTemplate { 5127 /// \brief Note that we are instantiating a class template, 5128 /// function template, or a member thereof. 5129 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5130 Decl *Entity, 5131 SourceRange InstantiationRange = SourceRange()); 5132 5133 /// \brief Note that we are instantiating a default argument in a 5134 /// template-id. 5135 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5136 TemplateDecl *Template, 5137 const TemplateArgument *TemplateArgs, 5138 unsigned NumTemplateArgs, 5139 SourceRange InstantiationRange = SourceRange()); 5140 5141 /// \brief Note that we are instantiating a default argument in a 5142 /// template-id. 5143 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5144 FunctionTemplateDecl *FunctionTemplate, 5145 const TemplateArgument *TemplateArgs, 5146 unsigned NumTemplateArgs, 5147 ActiveTemplateInstantiation::InstantiationKind Kind, 5148 sema::TemplateDeductionInfo &DeductionInfo, 5149 SourceRange InstantiationRange = SourceRange()); 5150 5151 /// \brief Note that we are instantiating as part of template 5152 /// argument deduction for a class template partial 5153 /// specialization. 5154 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5155 ClassTemplatePartialSpecializationDecl *PartialSpec, 5156 const TemplateArgument *TemplateArgs, 5157 unsigned NumTemplateArgs, 5158 sema::TemplateDeductionInfo &DeductionInfo, 5159 SourceRange InstantiationRange = SourceRange()); 5160 5161 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5162 ParmVarDecl *Param, 5163 const TemplateArgument *TemplateArgs, 5164 unsigned NumTemplateArgs, 5165 SourceRange InstantiationRange = SourceRange()); 5166 5167 /// \brief Note that we are substituting prior template arguments into a 5168 /// non-type or template template parameter. 5169 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5170 NamedDecl *Template, 5171 NonTypeTemplateParmDecl *Param, 5172 const TemplateArgument *TemplateArgs, 5173 unsigned NumTemplateArgs, 5174 SourceRange InstantiationRange); 5175 5176 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5177 NamedDecl *Template, 5178 TemplateTemplateParmDecl *Param, 5179 const TemplateArgument *TemplateArgs, 5180 unsigned NumTemplateArgs, 5181 SourceRange InstantiationRange); 5182 5183 /// \brief Note that we are checking the default template argument 5184 /// against the template parameter for a given template-id. 5185 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5186 TemplateDecl *Template, 5187 NamedDecl *Param, 5188 const TemplateArgument *TemplateArgs, 5189 unsigned NumTemplateArgs, 5190 SourceRange InstantiationRange); 5191 5192 5193 /// \brief Note that we have finished instantiating this template. 5194 void Clear(); 5195 5196 ~InstantiatingTemplate() { Clear(); } 5197 5198 /// \brief Determines whether we have exceeded the maximum 5199 /// recursive template instantiations. 5200 operator bool() const { return Invalid; } 5201 5202 private: 5203 Sema &SemaRef; 5204 bool Invalid; 5205 bool SavedInNonInstantiationSFINAEContext; 5206 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5207 SourceRange InstantiationRange); 5208 5209 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5210 5211 InstantiatingTemplate& 5212 operator=(const InstantiatingTemplate&); // not implemented 5213 }; 5214 5215 void PrintInstantiationStack(); 5216 5217 /// \brief Determines whether we are currently in a context where 5218 /// template argument substitution failures are not considered 5219 /// errors. 5220 /// 5221 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5222 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5223 /// template-deduction context object, which can be used to capture 5224 /// diagnostics that will be suppressed. 5225 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5226 5227 /// \brief RAII class used to determine whether SFINAE has 5228 /// trapped any errors that occur during template argument 5229 /// deduction.` 5230 class SFINAETrap { 5231 Sema &SemaRef; 5232 unsigned PrevSFINAEErrors; 5233 bool PrevInNonInstantiationSFINAEContext; 5234 bool PrevAccessCheckingSFINAE; 5235 5236 public: 5237 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5238 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5239 PrevInNonInstantiationSFINAEContext( 5240 SemaRef.InNonInstantiationSFINAEContext), 5241 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5242 { 5243 if (!SemaRef.isSFINAEContext()) 5244 SemaRef.InNonInstantiationSFINAEContext = true; 5245 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5246 } 5247 5248 ~SFINAETrap() { 5249 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5250 SemaRef.InNonInstantiationSFINAEContext 5251 = PrevInNonInstantiationSFINAEContext; 5252 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5253 } 5254 5255 /// \brief Determine whether any SFINAE errors have been trapped. 5256 bool hasErrorOccurred() const { 5257 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5258 } 5259 }; 5260 5261 /// \brief The current instantiation scope used to store local 5262 /// variables. 5263 LocalInstantiationScope *CurrentInstantiationScope; 5264 5265 /// \brief The number of typos corrected by CorrectTypo. 5266 unsigned TyposCorrected; 5267 5268 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5269 UnqualifiedTyposCorrectedMap; 5270 5271 /// \brief A cache containing the results of typo correction for unqualified 5272 /// name lookup. 5273 /// 5274 /// The string is the string that we corrected to (which may be empty, if 5275 /// there was no correction), while the boolean will be true when the 5276 /// string represents a keyword. 5277 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5278 5279 /// \brief Worker object for performing CFG-based warnings. 5280 sema::AnalysisBasedWarnings AnalysisWarnings; 5281 5282 /// \brief An entity for which implicit template instantiation is required. 5283 /// 5284 /// The source location associated with the declaration is the first place in 5285 /// the source code where the declaration was "used". It is not necessarily 5286 /// the point of instantiation (which will be either before or after the 5287 /// namespace-scope declaration that triggered this implicit instantiation), 5288 /// However, it is the location that diagnostics should generally refer to, 5289 /// because users will need to know what code triggered the instantiation. 5290 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5291 5292 /// \brief The queue of implicit template instantiations that are required 5293 /// but have not yet been performed. 5294 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5295 5296 /// \brief The queue of implicit template instantiations that are required 5297 /// and must be performed within the current local scope. 5298 /// 5299 /// This queue is only used for member functions of local classes in 5300 /// templates, which must be instantiated in the same scope as their 5301 /// enclosing function, so that they can reference function-local 5302 /// types, static variables, enumerators, etc. 5303 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5304 5305 void PerformPendingInstantiations(bool LocalOnly = false); 5306 5307 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5308 const MultiLevelTemplateArgumentList &TemplateArgs, 5309 SourceLocation Loc, DeclarationName Entity); 5310 5311 QualType SubstType(QualType T, 5312 const MultiLevelTemplateArgumentList &TemplateArgs, 5313 SourceLocation Loc, DeclarationName Entity); 5314 5315 TypeSourceInfo *SubstType(TypeLoc TL, 5316 const MultiLevelTemplateArgumentList &TemplateArgs, 5317 SourceLocation Loc, DeclarationName Entity); 5318 5319 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5320 const MultiLevelTemplateArgumentList &TemplateArgs, 5321 SourceLocation Loc, 5322 DeclarationName Entity); 5323 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5324 const MultiLevelTemplateArgumentList &TemplateArgs, 5325 int indexAdjustment, 5326 llvm::Optional<unsigned> NumExpansions, 5327 bool ExpectParameterPack); 5328 bool SubstParmTypes(SourceLocation Loc, 5329 ParmVarDecl **Params, unsigned NumParams, 5330 const MultiLevelTemplateArgumentList &TemplateArgs, 5331 SmallVectorImpl<QualType> &ParamTypes, 5332 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5333 ExprResult SubstExpr(Expr *E, 5334 const MultiLevelTemplateArgumentList &TemplateArgs); 5335 5336 /// \brief Substitute the given template arguments into a list of 5337 /// expressions, expanding pack expansions if required. 5338 /// 5339 /// \param Exprs The list of expressions to substitute into. 5340 /// 5341 /// \param NumExprs The number of expressions in \p Exprs. 5342 /// 5343 /// \param IsCall Whether this is some form of call, in which case 5344 /// default arguments will be dropped. 5345 /// 5346 /// \param TemplateArgs The set of template arguments to substitute. 5347 /// 5348 /// \param Outputs Will receive all of the substituted arguments. 5349 /// 5350 /// \returns true if an error occurred, false otherwise. 5351 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5352 const MultiLevelTemplateArgumentList &TemplateArgs, 5353 SmallVectorImpl<Expr *> &Outputs); 5354 5355 StmtResult SubstStmt(Stmt *S, 5356 const MultiLevelTemplateArgumentList &TemplateArgs); 5357 5358 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5359 const MultiLevelTemplateArgumentList &TemplateArgs); 5360 5361 ExprResult SubstInitializer(Expr *E, 5362 const MultiLevelTemplateArgumentList &TemplateArgs, 5363 bool CXXDirectInit); 5364 5365 bool 5366 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5367 CXXRecordDecl *Pattern, 5368 const MultiLevelTemplateArgumentList &TemplateArgs); 5369 5370 bool 5371 InstantiateClass(SourceLocation PointOfInstantiation, 5372 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5373 const MultiLevelTemplateArgumentList &TemplateArgs, 5374 TemplateSpecializationKind TSK, 5375 bool Complain = true); 5376 5377 struct LateInstantiatedAttribute { 5378 const Attr *TmplAttr; 5379 LocalInstantiationScope *Scope; 5380 Decl *NewDecl; 5381 5382 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5383 Decl *D) 5384 : TmplAttr(A), Scope(S), NewDecl(D) 5385 { } 5386 }; 5387 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5388 5389 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5390 const Decl *Pattern, Decl *Inst, 5391 LateInstantiatedAttrVec *LateAttrs = 0, 5392 LocalInstantiationScope *OuterMostScope = 0); 5393 5394 bool 5395 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5396 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5397 TemplateSpecializationKind TSK, 5398 bool Complain = true); 5399 5400 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5401 CXXRecordDecl *Instantiation, 5402 const MultiLevelTemplateArgumentList &TemplateArgs, 5403 TemplateSpecializationKind TSK); 5404 5405 void InstantiateClassTemplateSpecializationMembers( 5406 SourceLocation PointOfInstantiation, 5407 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5408 TemplateSpecializationKind TSK); 5409 5410 NestedNameSpecifierLoc 5411 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5412 const MultiLevelTemplateArgumentList &TemplateArgs); 5413 5414 DeclarationNameInfo 5415 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5416 const MultiLevelTemplateArgumentList &TemplateArgs); 5417 TemplateName 5418 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5419 SourceLocation Loc, 5420 const MultiLevelTemplateArgumentList &TemplateArgs); 5421 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5422 TemplateArgumentListInfo &Result, 5423 const MultiLevelTemplateArgumentList &TemplateArgs); 5424 5425 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5426 FunctionDecl *Function, 5427 bool Recursive = false, 5428 bool DefinitionRequired = false); 5429 void InstantiateStaticDataMemberDefinition( 5430 SourceLocation PointOfInstantiation, 5431 VarDecl *Var, 5432 bool Recursive = false, 5433 bool DefinitionRequired = false); 5434 5435 void InstantiateMemInitializers(CXXConstructorDecl *New, 5436 const CXXConstructorDecl *Tmpl, 5437 const MultiLevelTemplateArgumentList &TemplateArgs); 5438 5439 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5440 const MultiLevelTemplateArgumentList &TemplateArgs); 5441 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5442 const MultiLevelTemplateArgumentList &TemplateArgs); 5443 5444 // Objective-C declarations. 5445 enum ObjCContainerKind { 5446 OCK_None = -1, 5447 OCK_Interface = 0, 5448 OCK_Protocol, 5449 OCK_Category, 5450 OCK_ClassExtension, 5451 OCK_Implementation, 5452 OCK_CategoryImplementation 5453 }; 5454 ObjCContainerKind getObjCContainerKind() const; 5455 5456 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5457 IdentifierInfo *ClassName, 5458 SourceLocation ClassLoc, 5459 IdentifierInfo *SuperName, 5460 SourceLocation SuperLoc, 5461 Decl * const *ProtoRefs, 5462 unsigned NumProtoRefs, 5463 const SourceLocation *ProtoLocs, 5464 SourceLocation EndProtoLoc, 5465 AttributeList *AttrList); 5466 5467 Decl *ActOnCompatiblityAlias( 5468 SourceLocation AtCompatibilityAliasLoc, 5469 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5470 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5471 5472 bool CheckForwardProtocolDeclarationForCircularDependency( 5473 IdentifierInfo *PName, 5474 SourceLocation &PLoc, SourceLocation PrevLoc, 5475 const ObjCList<ObjCProtocolDecl> &PList); 5476 5477 Decl *ActOnStartProtocolInterface( 5478 SourceLocation AtProtoInterfaceLoc, 5479 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5480 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5481 const SourceLocation *ProtoLocs, 5482 SourceLocation EndProtoLoc, 5483 AttributeList *AttrList); 5484 5485 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5486 IdentifierInfo *ClassName, 5487 SourceLocation ClassLoc, 5488 IdentifierInfo *CategoryName, 5489 SourceLocation CategoryLoc, 5490 Decl * const *ProtoRefs, 5491 unsigned NumProtoRefs, 5492 const SourceLocation *ProtoLocs, 5493 SourceLocation EndProtoLoc); 5494 5495 Decl *ActOnStartClassImplementation( 5496 SourceLocation AtClassImplLoc, 5497 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5498 IdentifierInfo *SuperClassname, 5499 SourceLocation SuperClassLoc); 5500 5501 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5502 IdentifierInfo *ClassName, 5503 SourceLocation ClassLoc, 5504 IdentifierInfo *CatName, 5505 SourceLocation CatLoc); 5506 5507 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5508 ArrayRef<Decl *> Decls); 5509 5510 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5511 IdentifierInfo **IdentList, 5512 SourceLocation *IdentLocs, 5513 unsigned NumElts); 5514 5515 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5516 const IdentifierLocPair *IdentList, 5517 unsigned NumElts, 5518 AttributeList *attrList); 5519 5520 void FindProtocolDeclaration(bool WarnOnDeclarations, 5521 const IdentifierLocPair *ProtocolId, 5522 unsigned NumProtocols, 5523 SmallVectorImpl<Decl *> &Protocols); 5524 5525 /// Ensure attributes are consistent with type. 5526 /// \param [in, out] Attributes The attributes to check; they will 5527 /// be modified to be consistent with \arg PropertyTy. 5528 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5529 SourceLocation Loc, 5530 unsigned &Attributes); 5531 5532 /// Process the specified property declaration and create decls for the 5533 /// setters and getters as needed. 5534 /// \param property The property declaration being processed 5535 /// \param DC The semantic container for the property 5536 /// \param redeclaredProperty Declaration for property if redeclared 5537 /// in class extension. 5538 /// \param lexicalDC Container for redeclaredProperty. 5539 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5540 ObjCContainerDecl *DC, 5541 ObjCPropertyDecl *redeclaredProperty = 0, 5542 ObjCContainerDecl *lexicalDC = 0); 5543 5544 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5545 ObjCPropertyDecl *SuperProperty, 5546 const IdentifierInfo *Name); 5547 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5548 5549 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5550 ObjCMethodDecl *MethodDecl, 5551 bool IsInstance); 5552 5553 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5554 5555 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5556 ObjCInterfaceDecl *ID); 5557 5558 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5559 ObjCProtocolDecl *PDecl); 5560 5561 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5562 Decl **allMethods = 0, unsigned allNum = 0, 5563 Decl **allProperties = 0, unsigned pNum = 0, 5564 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5565 5566 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5567 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5568 Selector GetterSel, Selector SetterSel, 5569 bool *OverridingProperty, 5570 tok::ObjCKeywordKind MethodImplKind, 5571 DeclContext *lexicalDC = 0); 5572 5573 Decl *ActOnPropertyImplDecl(Scope *S, 5574 SourceLocation AtLoc, 5575 SourceLocation PropertyLoc, 5576 bool ImplKind, 5577 IdentifierInfo *PropertyId, 5578 IdentifierInfo *PropertyIvar, 5579 SourceLocation PropertyIvarLoc); 5580 5581 enum ObjCSpecialMethodKind { 5582 OSMK_None, 5583 OSMK_Alloc, 5584 OSMK_New, 5585 OSMK_Copy, 5586 OSMK_RetainingInit, 5587 OSMK_NonRetainingInit 5588 }; 5589 5590 struct ObjCArgInfo { 5591 IdentifierInfo *Name; 5592 SourceLocation NameLoc; 5593 // The Type is null if no type was specified, and the DeclSpec is invalid 5594 // in this case. 5595 ParsedType Type; 5596 ObjCDeclSpec DeclSpec; 5597 5598 /// ArgAttrs - Attribute list for this argument. 5599 AttributeList *ArgAttrs; 5600 }; 5601 5602 Decl *ActOnMethodDeclaration( 5603 Scope *S, 5604 SourceLocation BeginLoc, // location of the + or -. 5605 SourceLocation EndLoc, // location of the ; or {. 5606 tok::TokenKind MethodType, 5607 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5608 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5609 // optional arguments. The number of types/arguments is obtained 5610 // from the Sel.getNumArgs(). 5611 ObjCArgInfo *ArgInfo, 5612 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5613 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5614 bool isVariadic, bool MethodDefinition); 5615 5616 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5617 // Will search "local" class/category implementations for a method decl. 5618 // Will also search in class's root looking for instance method. 5619 // Returns 0 if no method is found. 5620 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5621 ObjCInterfaceDecl *CDecl); 5622 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5623 ObjCInterfaceDecl *ClassDecl); 5624 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5625 const ObjCObjectPointerType *OPT, 5626 bool IsInstance); 5627 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5628 bool IsInstance); 5629 5630 bool inferObjCARCLifetime(ValueDecl *decl); 5631 5632 ExprResult 5633 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5634 Expr *BaseExpr, 5635 SourceLocation OpLoc, 5636 DeclarationName MemberName, 5637 SourceLocation MemberLoc, 5638 SourceLocation SuperLoc, QualType SuperType, 5639 bool Super); 5640 5641 ExprResult 5642 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5643 IdentifierInfo &propertyName, 5644 SourceLocation receiverNameLoc, 5645 SourceLocation propertyNameLoc); 5646 5647 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5648 5649 /// \brief Describes the kind of message expression indicated by a message 5650 /// send that starts with an identifier. 5651 enum ObjCMessageKind { 5652 /// \brief The message is sent to 'super'. 5653 ObjCSuperMessage, 5654 /// \brief The message is an instance message. 5655 ObjCInstanceMessage, 5656 /// \brief The message is a class message, and the identifier is a type 5657 /// name. 5658 ObjCClassMessage 5659 }; 5660 5661 ObjCMessageKind getObjCMessageKind(Scope *S, 5662 IdentifierInfo *Name, 5663 SourceLocation NameLoc, 5664 bool IsSuper, 5665 bool HasTrailingDot, 5666 ParsedType &ReceiverType); 5667 5668 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5669 Selector Sel, 5670 SourceLocation LBracLoc, 5671 ArrayRef<SourceLocation> SelectorLocs, 5672 SourceLocation RBracLoc, 5673 MultiExprArg Args); 5674 5675 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5676 QualType ReceiverType, 5677 SourceLocation SuperLoc, 5678 Selector Sel, 5679 ObjCMethodDecl *Method, 5680 SourceLocation LBracLoc, 5681 ArrayRef<SourceLocation> SelectorLocs, 5682 SourceLocation RBracLoc, 5683 MultiExprArg Args, 5684 bool isImplicit = false); 5685 5686 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5687 bool isSuperReceiver, 5688 SourceLocation Loc, 5689 Selector Sel, 5690 ObjCMethodDecl *Method, 5691 MultiExprArg Args); 5692 5693 ExprResult ActOnClassMessage(Scope *S, 5694 ParsedType Receiver, 5695 Selector Sel, 5696 SourceLocation LBracLoc, 5697 ArrayRef<SourceLocation> SelectorLocs, 5698 SourceLocation RBracLoc, 5699 MultiExprArg Args); 5700 5701 ExprResult BuildInstanceMessage(Expr *Receiver, 5702 QualType ReceiverType, 5703 SourceLocation SuperLoc, 5704 Selector Sel, 5705 ObjCMethodDecl *Method, 5706 SourceLocation LBracLoc, 5707 ArrayRef<SourceLocation> SelectorLocs, 5708 SourceLocation RBracLoc, 5709 MultiExprArg Args, 5710 bool isImplicit = false); 5711 5712 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5713 QualType ReceiverType, 5714 SourceLocation Loc, 5715 Selector Sel, 5716 ObjCMethodDecl *Method, 5717 MultiExprArg Args); 5718 5719 ExprResult ActOnInstanceMessage(Scope *S, 5720 Expr *Receiver, 5721 Selector Sel, 5722 SourceLocation LBracLoc, 5723 ArrayRef<SourceLocation> SelectorLocs, 5724 SourceLocation RBracLoc, 5725 MultiExprArg Args); 5726 5727 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5728 ObjCBridgeCastKind Kind, 5729 SourceLocation BridgeKeywordLoc, 5730 TypeSourceInfo *TSInfo, 5731 Expr *SubExpr); 5732 5733 ExprResult ActOnObjCBridgedCast(Scope *S, 5734 SourceLocation LParenLoc, 5735 ObjCBridgeCastKind Kind, 5736 SourceLocation BridgeKeywordLoc, 5737 ParsedType Type, 5738 SourceLocation RParenLoc, 5739 Expr *SubExpr); 5740 5741 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5742 5743 /// \brief Check whether the given new method is a valid override of the 5744 /// given overridden method, and set any properties that should be inherited. 5745 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5746 const ObjCMethodDecl *Overridden, 5747 bool IsImplementation); 5748 5749 /// \brief Check whether the given method overrides any methods in its class, 5750 /// calling \c CheckObjCMethodOverride for each overridden method. 5751 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5752 5753 enum PragmaOptionsAlignKind { 5754 POAK_Native, // #pragma options align=native 5755 POAK_Natural, // #pragma options align=natural 5756 POAK_Packed, // #pragma options align=packed 5757 POAK_Power, // #pragma options align=power 5758 POAK_Mac68k, // #pragma options align=mac68k 5759 POAK_Reset // #pragma options align=reset 5760 }; 5761 5762 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5763 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5764 SourceLocation PragmaLoc, 5765 SourceLocation KindLoc); 5766 5767 enum PragmaPackKind { 5768 PPK_Default, // #pragma pack([n]) 5769 PPK_Show, // #pragma pack(show), only supported by MSVC. 5770 PPK_Push, // #pragma pack(push, [identifier], [n]) 5771 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5772 }; 5773 5774 enum PragmaMSStructKind { 5775 PMSST_OFF, // #pragms ms_struct off 5776 PMSST_ON // #pragms ms_struct on 5777 }; 5778 5779 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5780 void ActOnPragmaPack(PragmaPackKind Kind, 5781 IdentifierInfo *Name, 5782 Expr *Alignment, 5783 SourceLocation PragmaLoc, 5784 SourceLocation LParenLoc, 5785 SourceLocation RParenLoc); 5786 5787 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5788 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5789 5790 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5791 void ActOnPragmaUnused(const Token &Identifier, 5792 Scope *curScope, 5793 SourceLocation PragmaLoc); 5794 5795 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5796 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5797 SourceLocation PragmaLoc); 5798 5799 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5800 SourceLocation Loc); 5801 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5802 5803 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5804 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5805 SourceLocation PragmaLoc, 5806 SourceLocation WeakNameLoc); 5807 5808 /// ActOnPragmaRedefineExtname - Called on well formed 5809 /// #pragma redefine_extname oldname newname. 5810 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 5811 IdentifierInfo* AliasName, 5812 SourceLocation PragmaLoc, 5813 SourceLocation WeakNameLoc, 5814 SourceLocation AliasNameLoc); 5815 5816 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5817 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5818 IdentifierInfo* AliasName, 5819 SourceLocation PragmaLoc, 5820 SourceLocation WeakNameLoc, 5821 SourceLocation AliasNameLoc); 5822 5823 /// ActOnPragmaFPContract - Called on well formed 5824 /// #pragma {STDC,OPENCL} FP_CONTRACT 5825 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5826 5827 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5828 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5829 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5830 5831 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5832 void AddMsStructLayoutForRecord(RecordDecl *RD); 5833 5834 /// FreePackedContext - Deallocate and null out PackContext. 5835 void FreePackedContext(); 5836 5837 /// PushNamespaceVisibilityAttr - Note that we've entered a 5838 /// namespace with a visibility attribute. 5839 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5840 SourceLocation Loc); 5841 5842 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5843 /// add an appropriate visibility attribute. 5844 void AddPushedVisibilityAttribute(Decl *RD); 5845 5846 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5847 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5848 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5849 5850 /// FreeVisContext - Deallocate and null out VisContext. 5851 void FreeVisContext(); 5852 5853 /// AddCFAuditedAttribute - Check whether we're currently within 5854 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5855 /// the appropriate attribute. 5856 void AddCFAuditedAttribute(Decl *D); 5857 5858 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5859 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5860 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5861 5862 /// \brief The kind of conversion being performed. 5863 enum CheckedConversionKind { 5864 /// \brief An implicit conversion. 5865 CCK_ImplicitConversion, 5866 /// \brief A C-style cast. 5867 CCK_CStyleCast, 5868 /// \brief A functional-style cast. 5869 CCK_FunctionalCast, 5870 /// \brief A cast other than a C-style cast. 5871 CCK_OtherCast 5872 }; 5873 5874 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5875 /// cast. If there is already an implicit cast, merge into the existing one. 5876 /// If isLvalue, the result of the cast is an lvalue. 5877 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5878 ExprValueKind VK = VK_RValue, 5879 const CXXCastPath *BasePath = 0, 5880 CheckedConversionKind CCK 5881 = CCK_ImplicitConversion); 5882 5883 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5884 /// to the conversion from scalar type ScalarTy to the Boolean type. 5885 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5886 5887 /// IgnoredValueConversions - Given that an expression's result is 5888 /// syntactically ignored, perform any conversions that are 5889 /// required. 5890 ExprResult IgnoredValueConversions(Expr *E); 5891 5892 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5893 // functions and arrays to their respective pointers (C99 6.3.2.1). 5894 ExprResult UsualUnaryConversions(Expr *E); 5895 5896 // DefaultFunctionArrayConversion - converts functions and arrays 5897 // to their respective pointers (C99 6.3.2.1). 5898 ExprResult DefaultFunctionArrayConversion(Expr *E); 5899 5900 // DefaultFunctionArrayLvalueConversion - converts functions and 5901 // arrays to their respective pointers and performs the 5902 // lvalue-to-rvalue conversion. 5903 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5904 5905 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5906 // the operand. This is DefaultFunctionArrayLvalueConversion, 5907 // except that it assumes the operand isn't of function or array 5908 // type. 5909 ExprResult DefaultLvalueConversion(Expr *E); 5910 5911 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5912 // do not have a prototype. Integer promotions are performed on each 5913 // argument, and arguments that have type float are promoted to double. 5914 ExprResult DefaultArgumentPromotion(Expr *E); 5915 5916 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5917 enum VariadicCallType { 5918 VariadicFunction, 5919 VariadicBlock, 5920 VariadicMethod, 5921 VariadicConstructor, 5922 VariadicDoesNotApply 5923 }; 5924 5925 /// GatherArgumentsForCall - Collector argument expressions for various 5926 /// form of call prototypes. 5927 bool GatherArgumentsForCall(SourceLocation CallLoc, 5928 FunctionDecl *FDecl, 5929 const FunctionProtoType *Proto, 5930 unsigned FirstProtoArg, 5931 Expr **Args, unsigned NumArgs, 5932 SmallVector<Expr *, 8> &AllArgs, 5933 VariadicCallType CallType = VariadicDoesNotApply, 5934 bool AllowExplicit = false); 5935 5936 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5937 // will warn if the resulting type is not a POD type. 5938 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5939 FunctionDecl *FDecl); 5940 5941 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5942 // operands and then handles various conversions that are common to binary 5943 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5944 // routine returns the first non-arithmetic type found. The client is 5945 // responsible for emitting appropriate error diagnostics. 5946 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5947 bool IsCompAssign = false); 5948 5949 /// AssignConvertType - All of the 'assignment' semantic checks return this 5950 /// enum to indicate whether the assignment was allowed. These checks are 5951 /// done for simple assignments, as well as initialization, return from 5952 /// function, argument passing, etc. The query is phrased in terms of a 5953 /// source and destination type. 5954 enum AssignConvertType { 5955 /// Compatible - the types are compatible according to the standard. 5956 Compatible, 5957 5958 /// PointerToInt - The assignment converts a pointer to an int, which we 5959 /// accept as an extension. 5960 PointerToInt, 5961 5962 /// IntToPointer - The assignment converts an int to a pointer, which we 5963 /// accept as an extension. 5964 IntToPointer, 5965 5966 /// FunctionVoidPointer - The assignment is between a function pointer and 5967 /// void*, which the standard doesn't allow, but we accept as an extension. 5968 FunctionVoidPointer, 5969 5970 /// IncompatiblePointer - The assignment is between two pointers types that 5971 /// are not compatible, but we accept them as an extension. 5972 IncompatiblePointer, 5973 5974 /// IncompatiblePointer - The assignment is between two pointers types which 5975 /// point to integers which have a different sign, but are otherwise 5976 /// identical. This is a subset of the above, but broken out because it's by 5977 /// far the most common case of incompatible pointers. 5978 IncompatiblePointerSign, 5979 5980 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5981 /// c/v/r qualifiers, which we accept as an extension. 5982 CompatiblePointerDiscardsQualifiers, 5983 5984 /// IncompatiblePointerDiscardsQualifiers - The assignment 5985 /// discards qualifiers that we don't permit to be discarded, 5986 /// like address spaces. 5987 IncompatiblePointerDiscardsQualifiers, 5988 5989 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5990 /// nested pointer types, and the qualifiers other than the first two 5991 /// levels differ e.g. char ** -> const char **, but we accept them as an 5992 /// extension. 5993 IncompatibleNestedPointerQualifiers, 5994 5995 /// IncompatibleVectors - The assignment is between two vector types that 5996 /// have the same size, which we accept as an extension. 5997 IncompatibleVectors, 5998 5999 /// IntToBlockPointer - The assignment converts an int to a block 6000 /// pointer. We disallow this. 6001 IntToBlockPointer, 6002 6003 /// IncompatibleBlockPointer - The assignment is between two block 6004 /// pointers types that are not compatible. 6005 IncompatibleBlockPointer, 6006 6007 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6008 /// id type and something else (that is incompatible with it). For example, 6009 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6010 IncompatibleObjCQualifiedId, 6011 6012 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6013 /// object with __weak qualifier. 6014 IncompatibleObjCWeakRef, 6015 6016 /// Incompatible - We reject this conversion outright, it is invalid to 6017 /// represent it in the AST. 6018 Incompatible 6019 }; 6020 6021 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6022 /// assignment conversion type specified by ConvTy. This returns true if the 6023 /// conversion was invalid or false if the conversion was accepted. 6024 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6025 SourceLocation Loc, 6026 QualType DstType, QualType SrcType, 6027 Expr *SrcExpr, AssignmentAction Action, 6028 bool *Complained = 0); 6029 6030 /// CheckAssignmentConstraints - Perform type checking for assignment, 6031 /// argument passing, variable initialization, and function return values. 6032 /// C99 6.5.16. 6033 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6034 QualType LHSType, 6035 QualType RHSType); 6036 6037 /// Check assignment constraints and prepare for a conversion of the 6038 /// RHS to the LHS type. 6039 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6040 ExprResult &RHS, 6041 CastKind &Kind); 6042 6043 // CheckSingleAssignmentConstraints - Currently used by 6044 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6045 // this routine performs the default function/array converions. 6046 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6047 ExprResult &RHS, 6048 bool Diagnose = true); 6049 6050 // \brief If the lhs type is a transparent union, check whether we 6051 // can initialize the transparent union with the given expression. 6052 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6053 ExprResult &RHS); 6054 6055 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6056 6057 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6058 6059 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6060 AssignmentAction Action, 6061 bool AllowExplicit = false); 6062 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6063 AssignmentAction Action, 6064 bool AllowExplicit, 6065 ImplicitConversionSequence& ICS); 6066 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6067 const ImplicitConversionSequence& ICS, 6068 AssignmentAction Action, 6069 CheckedConversionKind CCK 6070 = CCK_ImplicitConversion); 6071 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6072 const StandardConversionSequence& SCS, 6073 AssignmentAction Action, 6074 CheckedConversionKind CCK); 6075 6076 /// the following "Check" methods will return a valid/converted QualType 6077 /// or a null QualType (indicating an error diagnostic was issued). 6078 6079 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6080 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6081 ExprResult &RHS); 6082 QualType CheckPointerToMemberOperands( // C++ 5.5 6083 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6084 SourceLocation OpLoc, bool isIndirect); 6085 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6086 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6087 bool IsDivide); 6088 QualType CheckRemainderOperands( // C99 6.5.5 6089 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6090 bool IsCompAssign = false); 6091 QualType CheckAdditionOperands( // C99 6.5.6 6092 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6093 QualType* CompLHSTy = 0); 6094 QualType CheckSubtractionOperands( // C99 6.5.6 6095 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6096 QualType* CompLHSTy = 0); 6097 QualType CheckShiftOperands( // C99 6.5.7 6098 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6099 bool IsCompAssign = false); 6100 QualType CheckCompareOperands( // C99 6.5.8/9 6101 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6102 bool isRelational); 6103 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6104 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6105 bool IsCompAssign = false); 6106 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6107 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6108 // CheckAssignmentOperands is used for both simple and compound assignment. 6109 // For simple assignment, pass both expressions and a null converted type. 6110 // For compound assignment, pass both expressions and the converted type. 6111 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6112 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6113 6114 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6115 UnaryOperatorKind Opcode, Expr *Op); 6116 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6117 BinaryOperatorKind Opcode, 6118 Expr *LHS, Expr *RHS); 6119 ExprResult checkPseudoObjectRValue(Expr *E); 6120 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6121 6122 QualType CheckConditionalOperands( // C99 6.5.15 6123 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6124 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6125 QualType CXXCheckConditionalOperands( // C++ 5.16 6126 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6127 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6128 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6129 bool *NonStandardCompositeType = 0); 6130 QualType FindCompositePointerType(SourceLocation Loc, 6131 ExprResult &E1, ExprResult &E2, 6132 bool *NonStandardCompositeType = 0) { 6133 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6134 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6135 NonStandardCompositeType); 6136 E1 = Owned(E1Tmp); 6137 E2 = Owned(E2Tmp); 6138 return Composite; 6139 } 6140 6141 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6142 SourceLocation QuestionLoc); 6143 6144 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6145 SourceLocation QuestionLoc); 6146 6147 /// type checking for vector binary operators. 6148 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6149 SourceLocation Loc, bool IsCompAssign); 6150 QualType GetSignedVectorType(QualType V); 6151 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6152 SourceLocation Loc, bool isRelational); 6153 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6154 SourceLocation Loc); 6155 6156 /// type checking declaration initializers (C99 6.7.8) 6157 bool CheckForConstantInitializer(Expr *e, QualType t); 6158 6159 // type checking C++ declaration initializers (C++ [dcl.init]). 6160 6161 /// ReferenceCompareResult - Expresses the result of comparing two 6162 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6163 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6164 enum ReferenceCompareResult { 6165 /// Ref_Incompatible - The two types are incompatible, so direct 6166 /// reference binding is not possible. 6167 Ref_Incompatible = 0, 6168 /// Ref_Related - The two types are reference-related, which means 6169 /// that their unqualified forms (T1 and T2) are either the same 6170 /// or T1 is a base class of T2. 6171 Ref_Related, 6172 /// Ref_Compatible_With_Added_Qualification - The two types are 6173 /// reference-compatible with added qualification, meaning that 6174 /// they are reference-compatible and the qualifiers on T1 (cv1) 6175 /// are greater than the qualifiers on T2 (cv2). 6176 Ref_Compatible_With_Added_Qualification, 6177 /// Ref_Compatible - The two types are reference-compatible and 6178 /// have equivalent qualifiers (cv1 == cv2). 6179 Ref_Compatible 6180 }; 6181 6182 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6183 QualType T1, QualType T2, 6184 bool &DerivedToBase, 6185 bool &ObjCConversion, 6186 bool &ObjCLifetimeConversion); 6187 6188 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6189 Expr *CastExpr, CastKind &CastKind, 6190 ExprValueKind &VK, CXXCastPath &Path); 6191 6192 /// \brief Force an expression with unknown-type to an expression of the 6193 /// given type. 6194 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6195 6196 // CheckVectorCast - check type constraints for vectors. 6197 // Since vectors are an extension, there are no C standard reference for this. 6198 // We allow casting between vectors and integer datatypes of the same size. 6199 // returns true if the cast is invalid 6200 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6201 CastKind &Kind); 6202 6203 // CheckExtVectorCast - check type constraints for extended vectors. 6204 // Since vectors are an extension, there are no C standard reference for this. 6205 // We allow casting between vectors and integer datatypes of the same size, 6206 // or vectors and the element type of that vector. 6207 // returns the cast expr 6208 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6209 CastKind &Kind); 6210 6211 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6212 SourceLocation LParenLoc, 6213 Expr *CastExpr, 6214 SourceLocation RParenLoc); 6215 6216 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6217 6218 /// \brief Checks for invalid conversions and casts between 6219 /// retainable pointers and other pointer kinds. 6220 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6221 QualType castType, Expr *&op, 6222 CheckedConversionKind CCK); 6223 6224 Expr *stripARCUnbridgedCast(Expr *e); 6225 void diagnoseARCUnbridgedCast(Expr *e); 6226 6227 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6228 QualType ExprType); 6229 6230 /// checkRetainCycles - Check whether an Objective-C message send 6231 /// might create an obvious retain cycle. 6232 void checkRetainCycles(ObjCMessageExpr *msg); 6233 void checkRetainCycles(Expr *receiver, Expr *argument); 6234 6235 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6236 /// to weak/__unsafe_unretained type. 6237 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6238 6239 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6240 /// to weak/__unsafe_unretained expression. 6241 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6242 6243 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6244 /// \param Method - May be null. 6245 /// \param [out] ReturnType - The return type of the send. 6246 /// \return true iff there were any incompatible types. 6247 bool CheckMessageArgumentTypes(QualType ReceiverType, 6248 Expr **Args, unsigned NumArgs, Selector Sel, 6249 ObjCMethodDecl *Method, bool isClassMessage, 6250 bool isSuperMessage, 6251 SourceLocation lbrac, SourceLocation rbrac, 6252 QualType &ReturnType, ExprValueKind &VK); 6253 6254 /// \brief Determine the result of a message send expression based on 6255 /// the type of the receiver, the method expected to receive the message, 6256 /// and the form of the message send. 6257 QualType getMessageSendResultType(QualType ReceiverType, 6258 ObjCMethodDecl *Method, 6259 bool isClassMessage, bool isSuperMessage); 6260 6261 /// \brief If the given expression involves a message send to a method 6262 /// with a related result type, emit a note describing what happened. 6263 void EmitRelatedResultTypeNote(const Expr *E); 6264 6265 /// CheckBooleanCondition - Diagnose problems involving the use of 6266 /// the given expression as a boolean condition (e.g. in an if 6267 /// statement). Also performs the standard function and array 6268 /// decays, possibly changing the input variable. 6269 /// 6270 /// \param Loc - A location associated with the condition, e.g. the 6271 /// 'if' keyword. 6272 /// \return true iff there were any errors 6273 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6274 6275 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6276 Expr *SubExpr); 6277 6278 /// DiagnoseAssignmentAsCondition - Given that an expression is 6279 /// being used as a boolean condition, warn if it's an assignment. 6280 void DiagnoseAssignmentAsCondition(Expr *E); 6281 6282 /// \brief Redundant parentheses over an equality comparison can indicate 6283 /// that the user intended an assignment used as condition. 6284 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6285 6286 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6287 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6288 6289 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6290 /// the specified width and sign. If an overflow occurs, detect it and emit 6291 /// the specified diagnostic. 6292 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6293 unsigned NewWidth, bool NewSign, 6294 SourceLocation Loc, unsigned DiagID); 6295 6296 /// Checks that the Objective-C declaration is declared in the global scope. 6297 /// Emits an error and marks the declaration as invalid if it's not declared 6298 /// in the global scope. 6299 bool CheckObjCDeclScope(Decl *D); 6300 6301 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6302 /// and reports the appropriate diagnostics. Returns false on success. 6303 /// Can optionally return the value of the expression. 6304 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6305 PartialDiagnostic Diag, 6306 bool AllowFold, 6307 PartialDiagnostic FoldDiag); 6308 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6309 PartialDiagnostic Diag, 6310 bool AllowFold = true) { 6311 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6312 PDiag(0)); 6313 } 6314 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6315 6316 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6317 /// the correct width, and that the field type is valid. 6318 /// Returns false on success. 6319 /// Can optionally return whether the bit-field is of width 0 6320 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6321 QualType FieldTy, Expr *BitWidth, 6322 bool *ZeroWidth = 0); 6323 6324 enum CUDAFunctionTarget { 6325 CFT_Device, 6326 CFT_Global, 6327 CFT_Host, 6328 CFT_HostDevice 6329 }; 6330 6331 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6332 6333 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6334 CUDAFunctionTarget CalleeTarget); 6335 6336 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6337 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6338 IdentifyCUDATarget(Callee)); 6339 } 6340 6341 /// \name Code completion 6342 //@{ 6343 /// \brief Describes the context in which code completion occurs. 6344 enum ParserCompletionContext { 6345 /// \brief Code completion occurs at top-level or namespace context. 6346 PCC_Namespace, 6347 /// \brief Code completion occurs within a class, struct, or union. 6348 PCC_Class, 6349 /// \brief Code completion occurs within an Objective-C interface, protocol, 6350 /// or category. 6351 PCC_ObjCInterface, 6352 /// \brief Code completion occurs within an Objective-C implementation or 6353 /// category implementation 6354 PCC_ObjCImplementation, 6355 /// \brief Code completion occurs within the list of instance variables 6356 /// in an Objective-C interface, protocol, category, or implementation. 6357 PCC_ObjCInstanceVariableList, 6358 /// \brief Code completion occurs following one or more template 6359 /// headers. 6360 PCC_Template, 6361 /// \brief Code completion occurs following one or more template 6362 /// headers within a class. 6363 PCC_MemberTemplate, 6364 /// \brief Code completion occurs within an expression. 6365 PCC_Expression, 6366 /// \brief Code completion occurs within a statement, which may 6367 /// also be an expression or a declaration. 6368 PCC_Statement, 6369 /// \brief Code completion occurs at the beginning of the 6370 /// initialization statement (or expression) in a for loop. 6371 PCC_ForInit, 6372 /// \brief Code completion occurs within the condition of an if, 6373 /// while, switch, or for statement. 6374 PCC_Condition, 6375 /// \brief Code completion occurs within the body of a function on a 6376 /// recovery path, where we do not have a specific handle on our position 6377 /// in the grammar. 6378 PCC_RecoveryInFunction, 6379 /// \brief Code completion occurs where only a type is permitted. 6380 PCC_Type, 6381 /// \brief Code completion occurs in a parenthesized expression, which 6382 /// might also be a type cast. 6383 PCC_ParenthesizedExpression, 6384 /// \brief Code completion occurs within a sequence of declaration 6385 /// specifiers within a function, method, or block. 6386 PCC_LocalDeclarationSpecifiers 6387 }; 6388 6389 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6390 void CodeCompleteOrdinaryName(Scope *S, 6391 ParserCompletionContext CompletionContext); 6392 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6393 bool AllowNonIdentifiers, 6394 bool AllowNestedNameSpecifiers); 6395 6396 struct CodeCompleteExpressionData; 6397 void CodeCompleteExpression(Scope *S, 6398 const CodeCompleteExpressionData &Data); 6399 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6400 SourceLocation OpLoc, 6401 bool IsArrow); 6402 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6403 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6404 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6405 void CodeCompleteCase(Scope *S); 6406 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6407 void CodeCompleteInitializer(Scope *S, Decl *D); 6408 void CodeCompleteReturn(Scope *S); 6409 void CodeCompleteAfterIf(Scope *S); 6410 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6411 6412 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6413 bool EnteringContext); 6414 void CodeCompleteUsing(Scope *S); 6415 void CodeCompleteUsingDirective(Scope *S); 6416 void CodeCompleteNamespaceDecl(Scope *S); 6417 void CodeCompleteNamespaceAliasDecl(Scope *S); 6418 void CodeCompleteOperatorName(Scope *S); 6419 void CodeCompleteConstructorInitializer(Decl *Constructor, 6420 CXXCtorInitializer** Initializers, 6421 unsigned NumInitializers); 6422 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6423 bool AfterAmpersand); 6424 6425 void CodeCompleteObjCAtDirective(Scope *S); 6426 void CodeCompleteObjCAtVisibility(Scope *S); 6427 void CodeCompleteObjCAtStatement(Scope *S); 6428 void CodeCompleteObjCAtExpression(Scope *S); 6429 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6430 void CodeCompleteObjCPropertyGetter(Scope *S); 6431 void CodeCompleteObjCPropertySetter(Scope *S); 6432 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6433 bool IsParameter); 6434 void CodeCompleteObjCMessageReceiver(Scope *S); 6435 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6436 IdentifierInfo **SelIdents, 6437 unsigned NumSelIdents, 6438 bool AtArgumentExpression); 6439 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6440 IdentifierInfo **SelIdents, 6441 unsigned NumSelIdents, 6442 bool AtArgumentExpression, 6443 bool IsSuper = false); 6444 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6445 IdentifierInfo **SelIdents, 6446 unsigned NumSelIdents, 6447 bool AtArgumentExpression, 6448 ObjCInterfaceDecl *Super = 0); 6449 void CodeCompleteObjCForCollection(Scope *S, 6450 DeclGroupPtrTy IterationVar); 6451 void CodeCompleteObjCSelector(Scope *S, 6452 IdentifierInfo **SelIdents, 6453 unsigned NumSelIdents); 6454 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6455 unsigned NumProtocols); 6456 void CodeCompleteObjCProtocolDecl(Scope *S); 6457 void CodeCompleteObjCInterfaceDecl(Scope *S); 6458 void CodeCompleteObjCSuperclass(Scope *S, 6459 IdentifierInfo *ClassName, 6460 SourceLocation ClassNameLoc); 6461 void CodeCompleteObjCImplementationDecl(Scope *S); 6462 void CodeCompleteObjCInterfaceCategory(Scope *S, 6463 IdentifierInfo *ClassName, 6464 SourceLocation ClassNameLoc); 6465 void CodeCompleteObjCImplementationCategory(Scope *S, 6466 IdentifierInfo *ClassName, 6467 SourceLocation ClassNameLoc); 6468 void CodeCompleteObjCPropertyDefinition(Scope *S); 6469 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6470 IdentifierInfo *PropertyName); 6471 void CodeCompleteObjCMethodDecl(Scope *S, 6472 bool IsInstanceMethod, 6473 ParsedType ReturnType); 6474 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6475 bool IsInstanceMethod, 6476 bool AtParameterName, 6477 ParsedType ReturnType, 6478 IdentifierInfo **SelIdents, 6479 unsigned NumSelIdents); 6480 void CodeCompletePreprocessorDirective(bool InConditional); 6481 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6482 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6483 void CodeCompletePreprocessorExpression(); 6484 void CodeCompletePreprocessorMacroArgument(Scope *S, 6485 IdentifierInfo *Macro, 6486 MacroInfo *MacroInfo, 6487 unsigned Argument); 6488 void CodeCompleteNaturalLanguage(); 6489 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6490 SmallVectorImpl<CodeCompletionResult> &Results); 6491 //@} 6492 6493 //===--------------------------------------------------------------------===// 6494 // Extra semantic analysis beyond the C type system 6495 6496public: 6497 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6498 unsigned ByteNo) const; 6499 6500private: 6501 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6502 const ArraySubscriptExpr *ASE=0, 6503 bool AllowOnePastEnd=true, bool IndexNegated=false); 6504 void CheckArrayAccess(const Expr *E); 6505 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6506 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6507 Expr **Args, unsigned NumArgs); 6508 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6509 6510 bool CheckObjCString(Expr *Arg); 6511 6512 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6513 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6514 6515 bool SemaBuiltinVAStart(CallExpr *TheCall); 6516 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6517 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6518 6519public: 6520 // Used by C++ template instantiation. 6521 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6522 6523private: 6524 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6525 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6526 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6527 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6528 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6529 AtomicExpr::AtomicOp Op); 6530 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6531 llvm::APSInt &Result); 6532 6533 enum FormatStringType { 6534 FST_Scanf, 6535 FST_Printf, 6536 FST_NSString, 6537 FST_Strftime, 6538 FST_Strfmon, 6539 FST_Kprintf, 6540 FST_Unknown 6541 }; 6542 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6543 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6544 bool HasVAListArg, unsigned format_idx, 6545 unsigned firstDataArg, FormatStringType Type, 6546 bool inFunctionCall = true); 6547 6548 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6549 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6550 unsigned format_idx, unsigned firstDataArg, 6551 FormatStringType Type, bool inFunctionCall); 6552 6553 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6554 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6555 unsigned NumArgs, bool IsCXXMember, 6556 SourceLocation Loc, SourceRange Range); 6557 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6558 bool HasVAListArg, unsigned format_idx, 6559 unsigned firstDataArg, FormatStringType Type, 6560 SourceLocation Loc, SourceRange range); 6561 6562 void CheckNonNullArguments(const NonNullAttr *NonNull, 6563 const Expr * const *ExprArgs, 6564 SourceLocation CallSiteLoc); 6565 6566 void CheckMemaccessArguments(const CallExpr *Call, 6567 unsigned BId, 6568 IdentifierInfo *FnName); 6569 6570 void CheckStrlcpycatArguments(const CallExpr *Call, 6571 IdentifierInfo *FnName); 6572 6573 void CheckStrncatArguments(const CallExpr *Call, 6574 IdentifierInfo *FnName); 6575 6576 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6577 SourceLocation ReturnLoc); 6578 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6579 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6580 6581 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6582 Expr *Init); 6583 6584 /// \brief The parser's current scope. 6585 /// 6586 /// The parser maintains this state here. 6587 Scope *CurScope; 6588 6589protected: 6590 friend class Parser; 6591 friend class InitializationSequence; 6592 friend class ASTReader; 6593 friend class ASTWriter; 6594 6595public: 6596 /// \brief Retrieve the parser's current scope. 6597 /// 6598 /// This routine must only be used when it is certain that semantic analysis 6599 /// and the parser are in precisely the same context, which is not the case 6600 /// when, e.g., we are performing any kind of template instantiation. 6601 /// Therefore, the only safe places to use this scope are in the parser 6602 /// itself and in routines directly invoked from the parser and *never* from 6603 /// template substitution or instantiation. 6604 Scope *getCurScope() const { return CurScope; } 6605 6606 Decl *getObjCDeclContext() const; 6607 6608 DeclContext *getCurLexicalContext() const { 6609 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6610 } 6611 6612 AvailabilityResult getCurContextAvailability() const; 6613}; 6614 6615/// \brief RAII object that enters a new expression evaluation context. 6616class EnterExpressionEvaluationContext { 6617 Sema &Actions; 6618 6619public: 6620 EnterExpressionEvaluationContext(Sema &Actions, 6621 Sema::ExpressionEvaluationContext NewContext, 6622 Decl *LambdaContextDecl = 0, 6623 bool IsDecltype = false) 6624 : Actions(Actions) { 6625 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6626 IsDecltype); 6627 } 6628 6629 ~EnterExpressionEvaluationContext() { 6630 Actions.PopExpressionEvaluationContext(); 6631 } 6632}; 6633 6634} // end namespace clang 6635 6636#endif 6637