Sema.h revision 8ef7b203332b0c8d65876a1f5e6d1db4e6f40e4b
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/MultiInitializer.h" 26#include "clang/Sema/TypoCorrection.h" 27#include "clang/Sema/Weak.h" 28#include "clang/AST/Expr.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/Lex/ModuleLoader.h" 33#include "clang/Basic/Specifiers.h" 34#include "clang/Basic/TemplateKinds.h" 35#include "clang/Basic/TypeTraits.h" 36#include "clang/Basic/ExpressionTraits.h" 37#include "llvm/ADT/ArrayRef.h" 38#include "llvm/ADT/OwningPtr.h" 39#include "llvm/ADT/SmallPtrSet.h" 40#include "llvm/ADT/SmallVector.h" 41#include <deque> 42#include <string> 43 44namespace llvm { 45 class APSInt; 46 template <typename ValueT> struct DenseMapInfo; 47 template <typename ValueT, typename ValueInfoT> class DenseSet; 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 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 63 class CXXConstructorDecl; 64 class CXXConversionDecl; 65 class CXXDestructorDecl; 66 class CXXFieldCollector; 67 class CXXMemberCallExpr; 68 class CXXMethodDecl; 69 class CXXScopeSpec; 70 class CXXTemporary; 71 class CXXTryStmt; 72 class CallExpr; 73 class ClassTemplateDecl; 74 class ClassTemplatePartialSpecializationDecl; 75 class ClassTemplateSpecializationDecl; 76 class CodeCompleteConsumer; 77 class CodeCompletionAllocator; 78 class CodeCompletionResult; 79 class Decl; 80 class DeclAccessPair; 81 class DeclContext; 82 class DeclRefExpr; 83 class DeclaratorDecl; 84 class DeducedTemplateArgument; 85 class DependentDiagnostic; 86 class DesignatedInitExpr; 87 class Designation; 88 class EnumConstantDecl; 89 class Expr; 90 class ExtVectorType; 91 class ExternalSemaSource; 92 class FormatAttr; 93 class FriendDecl; 94 class FunctionDecl; 95 class FunctionProtoType; 96 class FunctionTemplateDecl; 97 class ImplicitConversionSequence; 98 class InitListExpr; 99 class InitializationKind; 100 class InitializationSequence; 101 class InitializedEntity; 102 class IntegerLiteral; 103 class LabelStmt; 104 class LangOptions; 105 class LocalInstantiationScope; 106 class LookupResult; 107 class MacroInfo; 108 class MultiLevelTemplateArgumentList; 109 class NamedDecl; 110 class NonNullAttr; 111 class ObjCCategoryDecl; 112 class ObjCCategoryImplDecl; 113 class ObjCCompatibleAliasDecl; 114 class ObjCContainerDecl; 115 class ObjCImplDecl; 116 class ObjCImplementationDecl; 117 class ObjCInterfaceDecl; 118 class ObjCIvarDecl; 119 template <class T> class ObjCList; 120 class ObjCMessageExpr; 121 class ObjCMethodDecl; 122 class ObjCPropertyDecl; 123 class ObjCProtocolDecl; 124 class OverloadCandidateSet; 125 class OverloadExpr; 126 class ParenListExpr; 127 class ParmVarDecl; 128 class Preprocessor; 129 class PseudoDestructorTypeStorage; 130 class PseudoObjectExpr; 131 class QualType; 132 class StandardConversionSequence; 133 class Stmt; 134 class StringLiteral; 135 class SwitchStmt; 136 class TargetAttributesSema; 137 class TemplateArgument; 138 class TemplateArgumentList; 139 class TemplateArgumentLoc; 140 class TemplateDecl; 141 class TemplateParameterList; 142 class TemplatePartialOrderingContext; 143 class TemplateTemplateParmDecl; 144 class Token; 145 class TypeAliasDecl; 146 class TypedefDecl; 147 class TypedefNameDecl; 148 class TypeLoc; 149 class UnqualifiedId; 150 class UnresolvedLookupExpr; 151 class UnresolvedMemberExpr; 152 class UnresolvedSetImpl; 153 class UnresolvedSetIterator; 154 class UsingDecl; 155 class UsingShadowDecl; 156 class ValueDecl; 157 class VarDecl; 158 class VisibilityAttr; 159 class VisibleDeclConsumer; 160 class IndirectFieldDecl; 161 162namespace sema { 163 class AccessedEntity; 164 class BlockScopeInfo; 165 class DelayedDiagnostic; 166 class FunctionScopeInfo; 167 class LambdaScopeInfo; 168 class PossiblyUnreachableDiag; 169 class TemplateDeductionInfo; 170} 171 172// FIXME: No way to easily map from TemplateTypeParmTypes to 173// TemplateTypeParmDecls, so we have this horrible PointerUnion. 174typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 175 SourceLocation> UnexpandedParameterPack; 176 177/// Sema - This implements semantic analysis and AST building for C. 178class Sema { 179 Sema(const Sema&); // DO NOT IMPLEMENT 180 void operator=(const Sema&); // DO NOT IMPLEMENT 181 mutable const TargetAttributesSema* TheTargetAttributesSema; 182public: 183 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 184 typedef OpaquePtr<TemplateName> TemplateTy; 185 typedef OpaquePtr<QualType> TypeTy; 186 187 OpenCLOptions OpenCLFeatures; 188 FPOptions FPFeatures; 189 190 const LangOptions &LangOpts; 191 Preprocessor &PP; 192 ASTContext &Context; 193 ASTConsumer &Consumer; 194 DiagnosticsEngine &Diags; 195 SourceManager &SourceMgr; 196 197 /// \brief Flag indicating whether or not to collect detailed statistics. 198 bool CollectStats; 199 200 /// \brief Source of additional semantic information. 201 ExternalSemaSource *ExternalSource; 202 203 /// \brief Code-completion consumer. 204 CodeCompleteConsumer *CodeCompleter; 205 206 /// CurContext - This is the current declaration context of parsing. 207 DeclContext *CurContext; 208 209 /// \brief Generally null except when we temporarily switch decl contexts, 210 /// like in \see ActOnObjCTemporaryExitContainerContext. 211 DeclContext *OriginalLexicalContext; 212 213 /// VAListTagName - The declaration name corresponding to __va_list_tag. 214 /// This is used as part of a hack to omit that class from ADL results. 215 DeclarationName VAListTagName; 216 217 /// PackContext - Manages the stack for #pragma pack. An alignment 218 /// of 0 indicates default alignment. 219 void *PackContext; // Really a "PragmaPackStack*" 220 221 bool MSStructPragmaOn; // True when #pragma ms_struct on 222 223 /// VisContext - Manages the stack for #pragma GCC visibility. 224 void *VisContext; // Really a "PragmaVisStack*" 225 226 /// ExprNeedsCleanups - True if the current evaluation context 227 /// requires cleanups to be run at its conclusion. 228 bool ExprNeedsCleanups; 229 230 /// ExprCleanupObjects - This is the stack of objects requiring 231 /// cleanup that are created by the current full expression. The 232 /// element type here is ExprWithCleanups::Object. 233 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 234 235 /// \brief Stack containing information about each of the nested 236 /// function, block, and method scopes that are currently active. 237 /// 238 /// This array is never empty. Clients should ignore the first 239 /// element, which is used to cache a single FunctionScopeInfo 240 /// that's used to parse every top-level function. 241 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 242 243 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 244 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 245 ExtVectorDeclsType; 246 247 /// ExtVectorDecls - This is a list all the extended vector types. This allows 248 /// us to associate a raw vector type with one of the ext_vector type names. 249 /// This is only necessary for issuing pretty diagnostics. 250 ExtVectorDeclsType ExtVectorDecls; 251 252 /// \brief The set of types for which we have already complained about the 253 /// definitions being hidden. 254 /// 255 /// This set is used to suppress redundant diagnostics. 256 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 257 258 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 259 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 260 261 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 262 263 /// PureVirtualClassDiagSet - a set of class declarations which we have 264 /// emitted a list of pure virtual functions. Used to prevent emitting the 265 /// same list more than once. 266 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 267 268 /// ParsingInitForAutoVars - a set of declarations with auto types for which 269 /// we are currently parsing the initializer. 270 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 271 272 /// \brief A mapping from external names to the most recent 273 /// locally-scoped external declaration with that name. 274 /// 275 /// This map contains external declarations introduced in local 276 /// scoped, e.g., 277 /// 278 /// \code 279 /// void f() { 280 /// void foo(int, int); 281 /// } 282 /// \endcode 283 /// 284 /// Here, the name "foo" will be associated with the declaration on 285 /// "foo" within f. This name is not visible outside of 286 /// "f". However, we still find it in two cases: 287 /// 288 /// - If we are declaring another external with the name "foo", we 289 /// can find "foo" as a previous declaration, so that the types 290 /// of this external declaration can be checked for 291 /// compatibility. 292 /// 293 /// - If we would implicitly declare "foo" (e.g., due to a call to 294 /// "foo" in C when no prototype or definition is visible), then 295 /// we find this declaration of "foo" and complain that it is 296 /// not visible. 297 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 298 299 /// \brief Look for a locally scoped external declaration by the given name. 300 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 301 findLocallyScopedExternalDecl(DeclarationName Name); 302 303 typedef LazyVector<VarDecl *, ExternalSemaSource, 304 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 305 TentativeDefinitionsType; 306 307 /// \brief All the tentative definitions encountered in the TU. 308 TentativeDefinitionsType TentativeDefinitions; 309 310 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 311 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 312 UnusedFileScopedDeclsType; 313 314 /// \brief The set of file scoped decls seen so far that have not been used 315 /// and must warn if not used. Only contains the first declaration. 316 UnusedFileScopedDeclsType UnusedFileScopedDecls; 317 318 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 319 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 320 DelegatingCtorDeclsType; 321 322 /// \brief All the delegating constructors seen so far in the file, used for 323 /// cycle detection at the end of the TU. 324 DelegatingCtorDeclsType DelegatingCtorDecls; 325 326 /// \brief All the overriding destructors seen during a class definition 327 /// (there could be multiple due to nested classes) that had their exception 328 /// spec checks delayed, plus the overridden destructor. 329 SmallVector<std::pair<const CXXDestructorDecl*, 330 const CXXDestructorDecl*>, 2> 331 DelayedDestructorExceptionSpecChecks; 332 333 /// \brief Callback to the parser to parse templated functions when needed. 334 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 335 LateTemplateParserCB *LateTemplateParser; 336 void *OpaqueParser; 337 338 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 339 LateTemplateParser = LTP; 340 OpaqueParser = P; 341 } 342 343 class DelayedDiagnostics; 344 345 class ParsingDeclState { 346 unsigned SavedStackSize; 347 friend class Sema::DelayedDiagnostics; 348 }; 349 350 class ProcessingContextState { 351 unsigned SavedParsingDepth; 352 unsigned SavedActiveStackBase; 353 friend class Sema::DelayedDiagnostics; 354 }; 355 356 /// A class which encapsulates the logic for delaying diagnostics 357 /// during parsing and other processing. 358 class DelayedDiagnostics { 359 /// \brief The stack of diagnostics that were delayed due to being 360 /// produced during the parsing of a declaration. 361 sema::DelayedDiagnostic *Stack; 362 363 /// \brief The number of objects on the delayed-diagnostics stack. 364 unsigned StackSize; 365 366 /// \brief The current capacity of the delayed-diagnostics stack. 367 unsigned StackCapacity; 368 369 /// \brief The index of the first "active" delayed diagnostic in 370 /// the stack. When parsing class definitions, we ignore active 371 /// delayed diagnostics from the surrounding context. 372 unsigned ActiveStackBase; 373 374 /// \brief The depth of the declarations we're currently parsing. 375 /// This gets saved and reset whenever we enter a class definition. 376 unsigned ParsingDepth; 377 378 public: 379 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 380 ActiveStackBase(0), ParsingDepth(0) {} 381 382 ~DelayedDiagnostics() { 383 delete[] reinterpret_cast<char*>(Stack); 384 } 385 386 /// Adds a delayed diagnostic. 387 void add(const sema::DelayedDiagnostic &diag); 388 389 /// Determines whether diagnostics should be delayed. 390 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 391 392 /// Observe that we've started parsing a declaration. Access and 393 /// deprecation diagnostics will be delayed; when the declaration 394 /// is completed, all active delayed diagnostics will be evaluated 395 /// in its context, and then active diagnostics stack will be 396 /// popped down to the saved depth. 397 ParsingDeclState pushParsingDecl() { 398 ParsingDepth++; 399 400 ParsingDeclState state; 401 state.SavedStackSize = StackSize; 402 return state; 403 } 404 405 /// Observe that we're completed parsing a declaration. 406 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 407 408 /// Observe that we've started processing a different context, the 409 /// contents of which are semantically separate from the 410 /// declarations it may lexically appear in. This sets aside the 411 /// current stack of active diagnostics and starts afresh. 412 ProcessingContextState pushContext() { 413 assert(StackSize >= ActiveStackBase); 414 415 ProcessingContextState state; 416 state.SavedParsingDepth = ParsingDepth; 417 state.SavedActiveStackBase = ActiveStackBase; 418 419 ActiveStackBase = StackSize; 420 ParsingDepth = 0; 421 422 return state; 423 } 424 425 /// Observe that we've stopped processing a context. This 426 /// restores the previous stack of active diagnostics. 427 void popContext(ProcessingContextState state) { 428 assert(ActiveStackBase == StackSize); 429 assert(ParsingDepth == 0); 430 ActiveStackBase = state.SavedActiveStackBase; 431 ParsingDepth = state.SavedParsingDepth; 432 } 433 } DelayedDiagnostics; 434 435 /// A RAII object to temporarily push a declaration context. 436 class ContextRAII { 437 private: 438 Sema &S; 439 DeclContext *SavedContext; 440 ProcessingContextState SavedContextState; 441 442 public: 443 ContextRAII(Sema &S, DeclContext *ContextToPush) 444 : S(S), SavedContext(S.CurContext), 445 SavedContextState(S.DelayedDiagnostics.pushContext()) 446 { 447 assert(ContextToPush && "pushing null context"); 448 S.CurContext = ContextToPush; 449 } 450 451 void pop() { 452 if (!SavedContext) return; 453 S.CurContext = SavedContext; 454 S.DelayedDiagnostics.popContext(SavedContextState); 455 SavedContext = 0; 456 } 457 458 ~ContextRAII() { 459 pop(); 460 } 461 }; 462 463 /// WeakUndeclaredIdentifiers - Identifiers contained in 464 /// #pragma weak before declared. rare. may alias another 465 /// identifier, declared or undeclared 466 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 467 468 /// \brief Load weak undeclared identifiers from the external source. 469 void LoadExternalWeakUndeclaredIdentifiers(); 470 471 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 472 /// #pragma weak during processing of other Decls. 473 /// I couldn't figure out a clean way to generate these in-line, so 474 /// we store them here and handle separately -- which is a hack. 475 /// It would be best to refactor this. 476 SmallVector<Decl*,2> WeakTopLevelDecl; 477 478 IdentifierResolver IdResolver; 479 480 /// Translation Unit Scope - useful to Objective-C actions that need 481 /// to lookup file scope declarations in the "ordinary" C decl namespace. 482 /// For example, user-defined classes, built-in "id" type, etc. 483 Scope *TUScope; 484 485 /// \brief The C++ "std" namespace, where the standard library resides. 486 LazyDeclPtr StdNamespace; 487 488 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 489 /// standard library. 490 LazyDeclPtr StdBadAlloc; 491 492 /// \brief The C++ "std::initializer_list" template, which is defined in 493 /// <initializer_list>. 494 ClassTemplateDecl *StdInitializerList; 495 496 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 497 RecordDecl *CXXTypeInfoDecl; 498 499 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 500 RecordDecl *MSVCGuidDecl; 501 502 /// A flag to remember whether the implicit forms of operator new and delete 503 /// have been declared. 504 bool GlobalNewDeleteDeclared; 505 506 507 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 508 /// call was found yet. 509 bool ObjCShouldCallSuperDealloc; 510 /// A flag that is set when parsing a -finalize method and no [super finalize] 511 /// call was found yet. 512 bool ObjCShouldCallSuperFinalize; 513 514 /// \brief The set of declarations that have been referenced within 515 /// a potentially evaluated expression. 516 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 517 PotentiallyReferencedDecls; 518 519 /// \brief A set of diagnostics that may be emitted. 520 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 521 PotentiallyEmittedDiagnostics; 522 523 typedef SmallVector<sema::DelayedDiagnostic, 10> 524 PotentiallyEmittedDelayedDiag; 525 526 typedef SmallVector<sema::PossiblyUnreachableDiag, 10> 527 PotentiallyEmittedPossiblyUnreachableDiag; 528 529 /// \brief Describes how the expressions currently being parsed are 530 /// evaluated at run-time, if at all. 531 enum ExpressionEvaluationContext { 532 /// \brief The current expression and its subexpressions occur within an 533 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 534 /// \c sizeof, where the type of the expression may be significant but 535 /// no code will be generated to evaluate the value of the expression at 536 /// run time. 537 Unevaluated, 538 539 /// \brief The current expression and its subexpressions occur within a 540 /// constant expression. Such a context is not potentially-evaluated in 541 /// C++98, but is potentially-evaluated in C++11. 542 ConstantEvaluated, 543 544 /// \brief The current expression is potentially evaluated at run time, 545 /// which means that code may be generated to evaluate the value of the 546 /// expression at run time. 547 PotentiallyEvaluated, 548 549 /// \brief The current expression may be potentially evaluated or it may 550 /// be unevaluated, but it is impossible to tell from the lexical context. 551 /// This evaluation context is used primary for the operand of the C++ 552 /// \c typeid expression, whose argument is potentially evaluated only when 553 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 554 PotentiallyPotentiallyEvaluated, 555 556 /// \brief The current expression is potentially evaluated, but any 557 /// declarations referenced inside that expression are only used if 558 /// in fact the current expression is used. 559 /// 560 /// This value is used when parsing default function arguments, for which 561 /// we would like to provide diagnostics (e.g., passing non-POD arguments 562 /// through varargs) but do not want to mark declarations as "referenced" 563 /// until the default argument is used. 564 PotentiallyEvaluatedIfUsed 565 }; 566 567 /// \brief Data structure used to record current or nested 568 /// expression evaluation contexts. 569 struct ExpressionEvaluationContextRecord { 570 /// \brief The expression evaluation context. 571 ExpressionEvaluationContext Context; 572 573 /// \brief Whether the enclosing context needed a cleanup. 574 bool ParentNeedsCleanups; 575 576 /// \brief The number of active cleanup objects when we entered 577 /// this expression evaluation context. 578 unsigned NumCleanupObjects; 579 580 /// \brief The set of declarations referenced within a 581 /// potentially potentially-evaluated context. 582 /// 583 /// When leaving a potentially potentially-evaluated context, each 584 /// of these elements will be as referenced if the corresponding 585 /// potentially potentially evaluated expression is potentially 586 /// evaluated. 587 PotentiallyReferencedDecls *PotentiallyReferenced; 588 589 // There are three kinds of diagnostics we care about in 590 // PotentiallyPotentiallyEvaluated contexts: regular Diag diagnostics, 591 // DelayedDiagnostics, and DiagRuntimeBehavior diagnostics. 592 PotentiallyEmittedDiagnostics *SavedDiag; 593 PotentiallyEmittedDelayedDiag *SavedDelayedDiag; 594 PotentiallyEmittedPossiblyUnreachableDiag *SavedRuntimeDiag; 595 596 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 597 unsigned NumCleanupObjects, 598 bool ParentNeedsCleanups) 599 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 600 NumCleanupObjects(NumCleanupObjects), 601 PotentiallyReferenced(0), SavedDiag(0), SavedDelayedDiag(0), 602 SavedRuntimeDiag(0) { } 603 604 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 605 if (!PotentiallyReferenced) 606 PotentiallyReferenced = new PotentiallyReferencedDecls; 607 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 608 } 609 610 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD); 611 612 void addRuntimeDiagnostic(const sema::PossiblyUnreachableDiag &PUD); 613 614 void addDelayedDiagnostic(const sema::DelayedDiagnostic &DD); 615 616 void Destroy(); 617 }; 618 619 /// A stack of expression evaluation contexts. 620 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 621 622 /// SpecialMemberOverloadResult - The overloading result for a special member 623 /// function. 624 /// 625 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 626 /// integer is used to determine whether we have a parameter qualification 627 /// match, the second-lowest is whether we had success in resolving the 628 /// overload to a unique non-deleted function. 629 /// 630 /// The ConstParamMatch bit represents whether, when looking up a copy 631 /// constructor or assignment operator, we found a potential copy 632 /// constructor/assignment operator whose first parameter is const-qualified. 633 /// This is used for determining parameter types of other objects and is 634 /// utterly meaningless on other types of special members. 635 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 636 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 637 public: 638 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 639 : FastFoldingSetNode(ID) 640 {} 641 642 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 643 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 644 645 bool hasSuccess() const { return Pair.getInt() & 0x1; } 646 void setSuccess(bool B) { 647 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 648 } 649 650 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 651 void setConstParamMatch(bool B) { 652 Pair.setInt(B << 1 | unsigned(hasSuccess())); 653 } 654 }; 655 656 /// \brief A cache of special member function overload resolution results 657 /// for C++ records. 658 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 659 660 /// \brief The kind of translation unit we are processing. 661 /// 662 /// When we're processing a complete translation unit, Sema will perform 663 /// end-of-translation-unit semantic tasks (such as creating 664 /// initializers for tentative definitions in C) once parsing has 665 /// completed. Modules and precompiled headers perform different kinds of 666 /// checks. 667 TranslationUnitKind TUKind; 668 669 llvm::BumpPtrAllocator BumpAlloc; 670 671 /// \brief The number of SFINAE diagnostics that have been trapped. 672 unsigned NumSFINAEErrors; 673 674 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 675 UnparsedDefaultArgInstantiationsMap; 676 677 /// \brief A mapping from parameters with unparsed default arguments to the 678 /// set of instantiations of each parameter. 679 /// 680 /// This mapping is a temporary data structure used when parsing 681 /// nested class templates or nested classes of class templates, 682 /// where we might end up instantiating an inner class before the 683 /// default arguments of its methods have been parsed. 684 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 685 686 // Contains the locations of the beginning of unparsed default 687 // argument locations. 688 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 689 690 /// UndefinedInternals - all the used, undefined objects with 691 /// internal linkage in this translation unit. 692 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 693 694 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 695 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 696 697 /// Method Pool - allows efficient lookup when typechecking messages to "id". 698 /// We need to maintain a list, since selectors can have differing signatures 699 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 700 /// of selectors are "overloaded"). 701 GlobalMethodPool MethodPool; 702 703 /// Method selectors used in a @selector expression. Used for implementation 704 /// of -Wselector. 705 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 706 707 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 708 709 /// Private Helper predicate to check for 'self'. 710 bool isSelfExpr(Expr *RExpr); 711public: 712 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 713 TranslationUnitKind TUKind = TU_Complete, 714 CodeCompleteConsumer *CompletionConsumer = 0); 715 ~Sema(); 716 717 /// \brief Perform initialization that occurs after the parser has been 718 /// initialized but before it parses anything. 719 void Initialize(); 720 721 const LangOptions &getLangOptions() const { return LangOpts; } 722 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 723 FPOptions &getFPOptions() { return FPFeatures; } 724 725 DiagnosticsEngine &getDiagnostics() const { return Diags; } 726 SourceManager &getSourceManager() const { return SourceMgr; } 727 const TargetAttributesSema &getTargetAttributesSema() const; 728 Preprocessor &getPreprocessor() const { return PP; } 729 ASTContext &getASTContext() const { return Context; } 730 ASTConsumer &getASTConsumer() const { return Consumer; } 731 ASTMutationListener *getASTMutationListener() const; 732 733 void PrintStats() const; 734 735 /// \brief Helper class that creates diagnostics with optional 736 /// template instantiation stacks. 737 /// 738 /// This class provides a wrapper around the basic DiagnosticBuilder 739 /// class that emits diagnostics. SemaDiagnosticBuilder is 740 /// responsible for emitting the diagnostic (as DiagnosticBuilder 741 /// does) and, if the diagnostic comes from inside a template 742 /// instantiation, printing the template instantiation stack as 743 /// well. 744 class SemaDiagnosticBuilder : public DiagnosticBuilder { 745 Sema &SemaRef; 746 unsigned DiagID; 747 748 public: 749 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 750 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 751 752 explicit SemaDiagnosticBuilder(Sema &SemaRef) 753 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 754 755 ~SemaDiagnosticBuilder(); 756 }; 757 758 /// \brief Emit a diagnostic. 759 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 760 761 /// \brief Emit a partial diagnostic. 762 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 763 764 /// \brief Build a partial diagnostic. 765 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 766 767 bool findMacroSpelling(SourceLocation &loc, StringRef name); 768 769 /// \brief Get a string to suggest for zero-initialization of a type. 770 const char *getFixItZeroInitializerForType(QualType T) const; 771 772 ExprResult Owned(Expr* E) { return E; } 773 ExprResult Owned(ExprResult R) { return R; } 774 StmtResult Owned(Stmt* S) { return S; } 775 776 void ActOnEndOfTranslationUnit(); 777 778 void CheckDelegatingCtorCycles(); 779 780 Scope *getScopeForContext(DeclContext *Ctx); 781 782 void PushFunctionScope(); 783 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 784 void PushLambdaScope(CXXRecordDecl *Lambda); 785 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 786 const Decl *D = 0, const BlockExpr *blkExpr = 0); 787 788 sema::FunctionScopeInfo *getCurFunction() const { 789 return FunctionScopes.back(); 790 } 791 792 bool hasAnyUnrecoverableErrorsInThisFunction() const; 793 794 /// \brief Retrieve the current block, if any. 795 sema::BlockScopeInfo *getCurBlock(); 796 797 /// \brief Retrieve the current lambda expression, if any. 798 sema::LambdaScopeInfo *getCurLambda(); 799 800 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 801 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 802 803 //===--------------------------------------------------------------------===// 804 // Type Analysis / Processing: SemaType.cpp. 805 // 806 807 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 808 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 809 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 810 } 811 QualType BuildPointerType(QualType T, 812 SourceLocation Loc, DeclarationName Entity); 813 QualType BuildReferenceType(QualType T, bool LValueRef, 814 SourceLocation Loc, DeclarationName Entity); 815 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 816 Expr *ArraySize, unsigned Quals, 817 SourceRange Brackets, DeclarationName Entity); 818 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 819 SourceLocation AttrLoc); 820 QualType BuildFunctionType(QualType T, 821 QualType *ParamTypes, unsigned NumParamTypes, 822 bool Variadic, unsigned Quals, 823 RefQualifierKind RefQualifier, 824 SourceLocation Loc, DeclarationName Entity, 825 FunctionType::ExtInfo Info); 826 QualType BuildMemberPointerType(QualType T, QualType Class, 827 SourceLocation Loc, 828 DeclarationName Entity); 829 QualType BuildBlockPointerType(QualType T, 830 SourceLocation Loc, DeclarationName Entity); 831 QualType BuildParenType(QualType T); 832 QualType BuildAtomicType(QualType T, SourceLocation Loc); 833 834 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 835 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 836 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 837 TypeSourceInfo *ReturnTypeInfo); 838 /// \brief Package the given type and TSI into a ParsedType. 839 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 840 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 841 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 842 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 843 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 844 bool CheckDistantExceptionSpec(QualType T); 845 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 846 bool CheckEquivalentExceptionSpec( 847 const FunctionProtoType *Old, SourceLocation OldLoc, 848 const FunctionProtoType *New, SourceLocation NewLoc); 849 bool CheckEquivalentExceptionSpec( 850 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 851 const FunctionProtoType *Old, SourceLocation OldLoc, 852 const FunctionProtoType *New, SourceLocation NewLoc, 853 bool *MissingExceptionSpecification = 0, 854 bool *MissingEmptyExceptionSpecification = 0, 855 bool AllowNoexceptAllMatchWithNoSpec = false, 856 bool IsOperatorNew = false); 857 bool CheckExceptionSpecSubset( 858 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 859 const FunctionProtoType *Superset, SourceLocation SuperLoc, 860 const FunctionProtoType *Subset, SourceLocation SubLoc); 861 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 862 const FunctionProtoType *Target, SourceLocation TargetLoc, 863 const FunctionProtoType *Source, SourceLocation SourceLoc); 864 865 TypeResult ActOnTypeName(Scope *S, Declarator &D); 866 867 /// \brief The parser has parsed the context-sensitive type 'instancetype' 868 /// in an Objective-C message declaration. Return the appropriate type. 869 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 870 871 bool RequireCompleteType(SourceLocation Loc, QualType T, 872 const PartialDiagnostic &PD, 873 std::pair<SourceLocation, PartialDiagnostic> Note); 874 bool RequireCompleteType(SourceLocation Loc, QualType T, 875 const PartialDiagnostic &PD); 876 bool RequireCompleteType(SourceLocation Loc, QualType T, 877 unsigned DiagID); 878 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 879 std::pair<SourceLocation, 880 PartialDiagnostic> Note); 881 882 bool RequireLiteralType(SourceLocation Loc, QualType T, 883 const PartialDiagnostic &PD, 884 bool AllowIncompleteType = false); 885 886 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 887 const CXXScopeSpec &SS, QualType T); 888 889 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 890 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 891 QualType BuildUnaryTransformType(QualType BaseType, 892 UnaryTransformType::UTTKind UKind, 893 SourceLocation Loc); 894 895 //===--------------------------------------------------------------------===// 896 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 897 // 898 899 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 900 901 void DiagnoseUseOfUnimplementedSelectors(); 902 903 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 904 Scope *S, CXXScopeSpec *SS = 0, 905 bool isClassName = false, 906 bool HasTrailingDot = false, 907 ParsedType ObjectType = ParsedType(), 908 bool WantNontrivialTypeSourceInfo = false, 909 IdentifierInfo **CorrectedII = 0); 910 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 911 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 912 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 913 SourceLocation IILoc, 914 Scope *S, 915 CXXScopeSpec *SS, 916 ParsedType &SuggestedType); 917 918 /// \brief Describes the result of the name lookup and resolution performed 919 /// by \c ClassifyName(). 920 enum NameClassificationKind { 921 NC_Unknown, 922 NC_Error, 923 NC_Keyword, 924 NC_Type, 925 NC_Expression, 926 NC_NestedNameSpecifier, 927 NC_TypeTemplate, 928 NC_FunctionTemplate 929 }; 930 931 class NameClassification { 932 NameClassificationKind Kind; 933 ExprResult Expr; 934 TemplateName Template; 935 ParsedType Type; 936 const IdentifierInfo *Keyword; 937 938 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 939 940 public: 941 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 942 943 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 944 945 NameClassification(const IdentifierInfo *Keyword) 946 : Kind(NC_Keyword), Keyword(Keyword) { } 947 948 static NameClassification Error() { 949 return NameClassification(NC_Error); 950 } 951 952 static NameClassification Unknown() { 953 return NameClassification(NC_Unknown); 954 } 955 956 static NameClassification NestedNameSpecifier() { 957 return NameClassification(NC_NestedNameSpecifier); 958 } 959 960 static NameClassification TypeTemplate(TemplateName Name) { 961 NameClassification Result(NC_TypeTemplate); 962 Result.Template = Name; 963 return Result; 964 } 965 966 static NameClassification FunctionTemplate(TemplateName Name) { 967 NameClassification Result(NC_FunctionTemplate); 968 Result.Template = Name; 969 return Result; 970 } 971 972 NameClassificationKind getKind() const { return Kind; } 973 974 ParsedType getType() const { 975 assert(Kind == NC_Type); 976 return Type; 977 } 978 979 ExprResult getExpression() const { 980 assert(Kind == NC_Expression); 981 return Expr; 982 } 983 984 TemplateName getTemplateName() const { 985 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 986 return Template; 987 } 988 989 TemplateNameKind getTemplateNameKind() const { 990 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 991 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 992 } 993}; 994 995 /// \brief Perform name lookup on the given name, classifying it based on 996 /// the results of name lookup and the following token. 997 /// 998 /// This routine is used by the parser to resolve identifiers and help direct 999 /// parsing. When the identifier cannot be found, this routine will attempt 1000 /// to correct the typo and classify based on the resulting name. 1001 /// 1002 /// \param S The scope in which we're performing name lookup. 1003 /// 1004 /// \param SS The nested-name-specifier that precedes the name. 1005 /// 1006 /// \param Name The identifier. If typo correction finds an alternative name, 1007 /// this pointer parameter will be updated accordingly. 1008 /// 1009 /// \param NameLoc The location of the identifier. 1010 /// 1011 /// \param NextToken The token following the identifier. Used to help 1012 /// disambiguate the name. 1013 NameClassification ClassifyName(Scope *S, 1014 CXXScopeSpec &SS, 1015 IdentifierInfo *&Name, 1016 SourceLocation NameLoc, 1017 const Token &NextToken); 1018 1019 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1020 1021 Decl *HandleDeclarator(Scope *S, Declarator &D, 1022 MultiTemplateParamsArg TemplateParameterLists); 1023 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1024 const LookupResult &Previous, 1025 Scope *S); 1026 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1027 void DiagnoseFunctionSpecifiers(Declarator& D); 1028 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1029 void CheckShadow(Scope *S, VarDecl *D); 1030 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1031 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1032 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1033 TypeSourceInfo *TInfo, 1034 LookupResult &Previous); 1035 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1036 LookupResult &Previous, bool &Redeclaration); 1037 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1038 TypeSourceInfo *TInfo, 1039 LookupResult &Previous, 1040 MultiTemplateParamsArg TemplateParamLists); 1041 // Returns true if the variable declaration is a redeclaration 1042 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1043 void CheckCompleteVariableDeclaration(VarDecl *var); 1044 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1045 TypeSourceInfo *TInfo, 1046 LookupResult &Previous, 1047 MultiTemplateParamsArg TemplateParamLists, 1048 bool &AddToScope); 1049 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1050 1051 /// \brief The kind of constexpr declaration checking we are performing. 1052 /// 1053 /// The kind affects which diagnostics (if any) are emitted if the function 1054 /// does not satisfy the requirements of a constexpr function declaration. 1055 enum CheckConstexprKind { 1056 /// \brief Check a constexpr function declaration, and produce errors if it 1057 /// does not satisfy the requirements. 1058 CCK_Declaration, 1059 /// \brief Check a constexpr function template instantiation. 1060 CCK_Instantiation, 1061 /// \brief Produce notes explaining why an instantiation was not constexpr. 1062 CCK_NoteNonConstexprInstantiation 1063 }; 1064 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, 1065 CheckConstexprKind CCK); 1066 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1067 1068 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1069 // Returns true if the function declaration is a redeclaration 1070 bool CheckFunctionDeclaration(Scope *S, 1071 FunctionDecl *NewFD, LookupResult &Previous, 1072 bool IsExplicitSpecialization); 1073 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1074 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1075 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1076 SourceLocation Loc, 1077 QualType T); 1078 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1079 SourceLocation NameLoc, IdentifierInfo *Name, 1080 QualType T, TypeSourceInfo *TSInfo, 1081 StorageClass SC, StorageClass SCAsWritten); 1082 void ActOnParamDefaultArgument(Decl *param, 1083 SourceLocation EqualLoc, 1084 Expr *defarg); 1085 void ActOnParamUnparsedDefaultArgument(Decl *param, 1086 SourceLocation EqualLoc, 1087 SourceLocation ArgLoc); 1088 void ActOnParamDefaultArgumentError(Decl *param); 1089 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1090 SourceLocation EqualLoc); 1091 1092 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1093 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1094 bool TypeMayContainAuto); 1095 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1096 void ActOnInitializerError(Decl *Dcl); 1097 void ActOnCXXForRangeDecl(Decl *D); 1098 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1099 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1100 void FinalizeDeclaration(Decl *D); 1101 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1102 Decl **Group, 1103 unsigned NumDecls); 1104 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1105 bool TypeMayContainAuto = true); 1106 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1107 SourceLocation LocAfterDecls); 1108 void CheckForFunctionRedefinition(FunctionDecl *FD); 1109 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1110 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1111 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1112 1113 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1114 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1115 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1116 1117 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1118 /// attribute for which parsing is delayed. 1119 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1120 1121 /// \brief Diagnose any unused parameters in the given sequence of 1122 /// ParmVarDecl pointers. 1123 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1124 ParmVarDecl * const *End); 1125 1126 /// \brief Diagnose whether the size of parameters or return value of a 1127 /// function or obj-c method definition is pass-by-value and larger than a 1128 /// specified threshold. 1129 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1130 ParmVarDecl * const *End, 1131 QualType ReturnTy, 1132 NamedDecl *D); 1133 1134 void DiagnoseInvalidJumps(Stmt *Body); 1135 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1136 SourceLocation AsmLoc, 1137 SourceLocation RParenLoc); 1138 1139 /// \brief The parser has processed a module import declaration. 1140 /// 1141 /// \param AtLoc The location of the '@' symbol, if any. 1142 /// 1143 /// \param ImportLoc The location of the 'import' keyword. 1144 /// 1145 /// \param Path The module access path. 1146 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1147 ModuleIdPath Path); 1148 1149 /// \brief Retrieve a suitable printing policy. 1150 PrintingPolicy getPrintingPolicy() const { 1151 return getPrintingPolicy(Context, PP); 1152 } 1153 1154 /// \brief Retrieve a suitable printing policy. 1155 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1156 const Preprocessor &PP); 1157 1158 /// Scope actions. 1159 void ActOnPopScope(SourceLocation Loc, Scope *S); 1160 void ActOnTranslationUnitScope(Scope *S); 1161 1162 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1163 DeclSpec &DS); 1164 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1165 DeclSpec &DS, 1166 MultiTemplateParamsArg TemplateParams); 1167 1168 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1169 AccessSpecifier AS, 1170 RecordDecl *Record); 1171 1172 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1173 RecordDecl *Record); 1174 1175 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1176 TagTypeKind NewTag, bool isDefinition, 1177 SourceLocation NewTagLoc, 1178 const IdentifierInfo &Name); 1179 1180 enum TagUseKind { 1181 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1182 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1183 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1184 TUK_Friend // Friend declaration: 'friend struct foo;' 1185 }; 1186 1187 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1188 SourceLocation KWLoc, CXXScopeSpec &SS, 1189 IdentifierInfo *Name, SourceLocation NameLoc, 1190 AttributeList *Attr, AccessSpecifier AS, 1191 SourceLocation ModulePrivateLoc, 1192 MultiTemplateParamsArg TemplateParameterLists, 1193 bool &OwnedDecl, bool &IsDependent, 1194 SourceLocation ScopedEnumKWLoc, 1195 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1196 1197 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1198 unsigned TagSpec, SourceLocation TagLoc, 1199 CXXScopeSpec &SS, 1200 IdentifierInfo *Name, SourceLocation NameLoc, 1201 AttributeList *Attr, 1202 MultiTemplateParamsArg TempParamLists); 1203 1204 TypeResult ActOnDependentTag(Scope *S, 1205 unsigned TagSpec, 1206 TagUseKind TUK, 1207 const CXXScopeSpec &SS, 1208 IdentifierInfo *Name, 1209 SourceLocation TagLoc, 1210 SourceLocation NameLoc); 1211 1212 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1213 IdentifierInfo *ClassName, 1214 SmallVectorImpl<Decl *> &Decls); 1215 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1216 Declarator &D, Expr *BitfieldWidth); 1217 1218 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1219 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1220 AccessSpecifier AS); 1221 1222 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1223 TypeSourceInfo *TInfo, 1224 RecordDecl *Record, SourceLocation Loc, 1225 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1226 SourceLocation TSSL, 1227 AccessSpecifier AS, NamedDecl *PrevDecl, 1228 Declarator *D = 0); 1229 1230 enum CXXSpecialMember { 1231 CXXDefaultConstructor, 1232 CXXCopyConstructor, 1233 CXXMoveConstructor, 1234 CXXCopyAssignment, 1235 CXXMoveAssignment, 1236 CXXDestructor, 1237 CXXInvalid 1238 }; 1239 bool CheckNontrivialField(FieldDecl *FD); 1240 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1241 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1242 void ActOnLastBitfield(SourceLocation DeclStart, 1243 SmallVectorImpl<Decl *> &AllIvarDecls); 1244 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1245 Declarator &D, Expr *BitfieldWidth, 1246 tok::ObjCKeywordKind visibility); 1247 1248 // This is used for both record definitions and ObjC interface declarations. 1249 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1250 llvm::ArrayRef<Decl *> Fields, 1251 SourceLocation LBrac, SourceLocation RBrac, 1252 AttributeList *AttrList); 1253 1254 /// ActOnTagStartDefinition - Invoked when we have entered the 1255 /// scope of a tag's definition (e.g., for an enumeration, class, 1256 /// struct, or union). 1257 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1258 1259 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1260 1261 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1262 /// C++ record definition's base-specifiers clause and are starting its 1263 /// member declarations. 1264 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1265 SourceLocation FinalLoc, 1266 SourceLocation LBraceLoc); 1267 1268 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1269 /// the definition of a tag (enumeration, class, struct, or union). 1270 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1271 SourceLocation RBraceLoc); 1272 1273 void ActOnObjCContainerFinishDefinition(); 1274 1275 /// \brief Invoked when we must temporarily exit the objective-c container 1276 /// scope for parsing/looking-up C constructs. 1277 /// 1278 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1279 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1280 void ActOnObjCReenterContainerContext(DeclContext *DC); 1281 1282 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1283 /// error parsing the definition of a tag. 1284 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1285 1286 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1287 EnumConstantDecl *LastEnumConst, 1288 SourceLocation IdLoc, 1289 IdentifierInfo *Id, 1290 Expr *val); 1291 1292 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1293 SourceLocation IdLoc, IdentifierInfo *Id, 1294 AttributeList *Attrs, 1295 SourceLocation EqualLoc, Expr *Val); 1296 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1297 SourceLocation RBraceLoc, Decl *EnumDecl, 1298 Decl **Elements, unsigned NumElements, 1299 Scope *S, AttributeList *Attr); 1300 1301 DeclContext *getContainingDC(DeclContext *DC); 1302 1303 /// Set the current declaration context until it gets popped. 1304 void PushDeclContext(Scope *S, DeclContext *DC); 1305 void PopDeclContext(); 1306 1307 /// EnterDeclaratorContext - Used when we must lookup names in the context 1308 /// of a declarator's nested name specifier. 1309 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1310 void ExitDeclaratorContext(Scope *S); 1311 1312 /// Push the parameters of D, which must be a function, into scope. 1313 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1314 void ActOnExitFunctionContext() { PopDeclContext(); } 1315 1316 DeclContext *getFunctionLevelDeclContext(); 1317 1318 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1319 /// to the function decl for the function being parsed. If we're currently 1320 /// in a 'block', this returns the containing context. 1321 FunctionDecl *getCurFunctionDecl(); 1322 1323 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1324 /// the method decl for the method being parsed. If we're currently 1325 /// in a 'block', this returns the containing context. 1326 ObjCMethodDecl *getCurMethodDecl(); 1327 1328 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1329 /// or C function we're in, otherwise return null. If we're currently 1330 /// in a 'block', this returns the containing context. 1331 NamedDecl *getCurFunctionOrMethodDecl(); 1332 1333 /// Add this decl to the scope shadowed decl chains. 1334 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1335 1336 /// \brief Make the given externally-produced declaration visible at the 1337 /// top level scope. 1338 /// 1339 /// \param D The externally-produced declaration to push. 1340 /// 1341 /// \param Name The name of the externally-produced declaration. 1342 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1343 1344 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1345 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1346 /// true if 'D' belongs to the given declaration context. 1347 /// 1348 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1349 /// whether the declaration is in scope for the purposes of explicit template 1350 /// instantiation or specialization. The default is false. 1351 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1352 bool ExplicitInstantiationOrSpecialization = false); 1353 1354 /// Finds the scope corresponding to the given decl context, if it 1355 /// happens to be an enclosing scope. Otherwise return NULL. 1356 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1357 1358 /// Subroutines of ActOnDeclarator(). 1359 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1360 TypeSourceInfo *TInfo); 1361 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1362 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1363 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1364 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1365 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1366 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1367 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1368 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1369 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1370 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1371 1372 // AssignmentAction - This is used by all the assignment diagnostic functions 1373 // to represent what is actually causing the operation 1374 enum AssignmentAction { 1375 AA_Assigning, 1376 AA_Passing, 1377 AA_Returning, 1378 AA_Converting, 1379 AA_Initializing, 1380 AA_Sending, 1381 AA_Casting 1382 }; 1383 1384 /// C++ Overloading. 1385 enum OverloadKind { 1386 /// This is a legitimate overload: the existing declarations are 1387 /// functions or function templates with different signatures. 1388 Ovl_Overload, 1389 1390 /// This is not an overload because the signature exactly matches 1391 /// an existing declaration. 1392 Ovl_Match, 1393 1394 /// This is not an overload because the lookup results contain a 1395 /// non-function. 1396 Ovl_NonFunction 1397 }; 1398 OverloadKind CheckOverload(Scope *S, 1399 FunctionDecl *New, 1400 const LookupResult &OldDecls, 1401 NamedDecl *&OldDecl, 1402 bool IsForUsingDecl); 1403 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1404 1405 /// \brief Checks availability of the function depending on the current 1406 /// function context.Inside an unavailable function,unavailability is ignored. 1407 /// 1408 /// \returns true if \arg FD is unavailable and current context is inside 1409 /// an available function, false otherwise. 1410 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1411 1412 ImplicitConversionSequence 1413 TryImplicitConversion(Expr *From, QualType ToType, 1414 bool SuppressUserConversions, 1415 bool AllowExplicit, 1416 bool InOverloadResolution, 1417 bool CStyle, 1418 bool AllowObjCWritebackConversion); 1419 1420 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1421 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1422 bool IsComplexPromotion(QualType FromType, QualType ToType); 1423 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1424 bool InOverloadResolution, 1425 QualType& ConvertedType, bool &IncompatibleObjC); 1426 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1427 QualType& ConvertedType, bool &IncompatibleObjC); 1428 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1429 QualType &ConvertedType); 1430 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1431 QualType& ConvertedType); 1432 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1433 const FunctionProtoType *NewType, 1434 unsigned *ArgPos = 0); 1435 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1436 QualType FromType, QualType ToType); 1437 1438 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1439 bool CheckPointerConversion(Expr *From, QualType ToType, 1440 CastKind &Kind, 1441 CXXCastPath& BasePath, 1442 bool IgnoreBaseAccess); 1443 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1444 bool InOverloadResolution, 1445 QualType &ConvertedType); 1446 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1447 CastKind &Kind, 1448 CXXCastPath &BasePath, 1449 bool IgnoreBaseAccess); 1450 bool IsQualificationConversion(QualType FromType, QualType ToType, 1451 bool CStyle, bool &ObjCLifetimeConversion); 1452 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1453 QualType &ResultTy); 1454 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1455 1456 1457 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1458 const VarDecl *NRVOCandidate, 1459 QualType ResultType, 1460 Expr *Value, 1461 bool AllowNRVO = true); 1462 1463 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1464 ExprResult Init); 1465 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1466 SourceLocation EqualLoc, 1467 ExprResult Init, 1468 bool TopLevelOfInitList = false); 1469 ExprResult PerformObjectArgumentInitialization(Expr *From, 1470 NestedNameSpecifier *Qualifier, 1471 NamedDecl *FoundDecl, 1472 CXXMethodDecl *Method); 1473 1474 ExprResult PerformContextuallyConvertToBool(Expr *From); 1475 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1476 1477 /// Contexts in which a converted constant expression is required. 1478 enum CCEKind { 1479 CCEK_CaseValue, ///< Expression in a case label. 1480 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1481 CCEK_TemplateArg ///< Value of a non-type template parameter. 1482 }; 1483 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1484 llvm::APSInt &Value, CCEKind CCE); 1485 1486 ExprResult 1487 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1488 const PartialDiagnostic &NotIntDiag, 1489 const PartialDiagnostic &IncompleteDiag, 1490 const PartialDiagnostic &ExplicitConvDiag, 1491 const PartialDiagnostic &ExplicitConvNote, 1492 const PartialDiagnostic &AmbigDiag, 1493 const PartialDiagnostic &AmbigNote, 1494 const PartialDiagnostic &ConvDiag); 1495 1496 ExprResult PerformObjectMemberConversion(Expr *From, 1497 NestedNameSpecifier *Qualifier, 1498 NamedDecl *FoundDecl, 1499 NamedDecl *Member); 1500 1501 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1502 // TODO: make this is a typesafe union. 1503 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1504 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1505 1506 void AddOverloadCandidate(NamedDecl *Function, 1507 DeclAccessPair FoundDecl, 1508 Expr **Args, unsigned NumArgs, 1509 OverloadCandidateSet &CandidateSet); 1510 1511 void AddOverloadCandidate(FunctionDecl *Function, 1512 DeclAccessPair FoundDecl, 1513 Expr **Args, unsigned NumArgs, 1514 OverloadCandidateSet& CandidateSet, 1515 bool SuppressUserConversions = false, 1516 bool PartialOverloading = false); 1517 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1518 Expr **Args, unsigned NumArgs, 1519 OverloadCandidateSet& CandidateSet, 1520 bool SuppressUserConversions = false); 1521 void AddMethodCandidate(DeclAccessPair FoundDecl, 1522 QualType ObjectType, 1523 Expr::Classification ObjectClassification, 1524 Expr **Args, unsigned NumArgs, 1525 OverloadCandidateSet& CandidateSet, 1526 bool SuppressUserConversion = false); 1527 void AddMethodCandidate(CXXMethodDecl *Method, 1528 DeclAccessPair FoundDecl, 1529 CXXRecordDecl *ActingContext, QualType ObjectType, 1530 Expr::Classification ObjectClassification, 1531 Expr **Args, unsigned NumArgs, 1532 OverloadCandidateSet& CandidateSet, 1533 bool SuppressUserConversions = false); 1534 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1535 DeclAccessPair FoundDecl, 1536 CXXRecordDecl *ActingContext, 1537 TemplateArgumentListInfo *ExplicitTemplateArgs, 1538 QualType ObjectType, 1539 Expr::Classification ObjectClassification, 1540 Expr **Args, unsigned NumArgs, 1541 OverloadCandidateSet& CandidateSet, 1542 bool SuppressUserConversions = false); 1543 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1544 DeclAccessPair FoundDecl, 1545 TemplateArgumentListInfo *ExplicitTemplateArgs, 1546 Expr **Args, unsigned NumArgs, 1547 OverloadCandidateSet& CandidateSet, 1548 bool SuppressUserConversions = false); 1549 void AddConversionCandidate(CXXConversionDecl *Conversion, 1550 DeclAccessPair FoundDecl, 1551 CXXRecordDecl *ActingContext, 1552 Expr *From, QualType ToType, 1553 OverloadCandidateSet& CandidateSet); 1554 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1555 DeclAccessPair FoundDecl, 1556 CXXRecordDecl *ActingContext, 1557 Expr *From, QualType ToType, 1558 OverloadCandidateSet &CandidateSet); 1559 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1560 DeclAccessPair FoundDecl, 1561 CXXRecordDecl *ActingContext, 1562 const FunctionProtoType *Proto, 1563 Expr *Object, Expr **Args, unsigned NumArgs, 1564 OverloadCandidateSet& CandidateSet); 1565 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1566 SourceLocation OpLoc, 1567 Expr **Args, unsigned NumArgs, 1568 OverloadCandidateSet& CandidateSet, 1569 SourceRange OpRange = SourceRange()); 1570 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1571 Expr **Args, unsigned NumArgs, 1572 OverloadCandidateSet& CandidateSet, 1573 bool IsAssignmentOperator = false, 1574 unsigned NumContextualBoolArguments = 0); 1575 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1576 SourceLocation OpLoc, 1577 Expr **Args, unsigned NumArgs, 1578 OverloadCandidateSet& CandidateSet); 1579 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1580 bool Operator, 1581 Expr **Args, unsigned NumArgs, 1582 TemplateArgumentListInfo *ExplicitTemplateArgs, 1583 OverloadCandidateSet& CandidateSet, 1584 bool PartialOverloading = false, 1585 bool StdNamespaceIsAssociated = false); 1586 1587 // Emit as a 'note' the specific overload candidate 1588 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1589 1590 // Emit as a series of 'note's all template and non-templates 1591 // identified by the expression Expr 1592 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1593 1594 // [PossiblyAFunctionType] --> [Return] 1595 // NonFunctionType --> NonFunctionType 1596 // R (A) --> R(A) 1597 // R (*)(A) --> R (A) 1598 // R (&)(A) --> R (A) 1599 // R (S::*)(A) --> R (A) 1600 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1601 1602 FunctionDecl * 1603 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1604 QualType TargetType, 1605 bool Complain, 1606 DeclAccessPair &Found, 1607 bool *pHadMultipleCandidates = 0); 1608 1609 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1610 bool Complain = false, 1611 DeclAccessPair* Found = 0); 1612 1613 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1614 ExprResult &SrcExpr, 1615 bool DoFunctionPointerConverion = false, 1616 bool Complain = false, 1617 const SourceRange& OpRangeForComplaining = SourceRange(), 1618 QualType DestTypeForComplaining = QualType(), 1619 unsigned DiagIDForComplaining = 0); 1620 1621 1622 Expr *FixOverloadedFunctionReference(Expr *E, 1623 DeclAccessPair FoundDecl, 1624 FunctionDecl *Fn); 1625 ExprResult FixOverloadedFunctionReference(ExprResult, 1626 DeclAccessPair FoundDecl, 1627 FunctionDecl *Fn); 1628 1629 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1630 Expr **Args, unsigned NumArgs, 1631 OverloadCandidateSet &CandidateSet, 1632 bool PartialOverloading = false); 1633 1634 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1635 UnresolvedLookupExpr *ULE, 1636 SourceLocation LParenLoc, 1637 Expr **Args, unsigned NumArgs, 1638 SourceLocation RParenLoc, 1639 Expr *ExecConfig); 1640 1641 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1642 unsigned Opc, 1643 const UnresolvedSetImpl &Fns, 1644 Expr *input); 1645 1646 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1647 unsigned Opc, 1648 const UnresolvedSetImpl &Fns, 1649 Expr *LHS, Expr *RHS); 1650 1651 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1652 SourceLocation RLoc, 1653 Expr *Base,Expr *Idx); 1654 1655 ExprResult 1656 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1657 SourceLocation LParenLoc, Expr **Args, 1658 unsigned NumArgs, SourceLocation RParenLoc); 1659 ExprResult 1660 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1661 Expr **Args, unsigned NumArgs, 1662 SourceLocation RParenLoc); 1663 1664 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1665 SourceLocation OpLoc); 1666 1667 /// CheckCallReturnType - Checks that a call expression's return type is 1668 /// complete. Returns true on failure. The location passed in is the location 1669 /// that best represents the call. 1670 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1671 CallExpr *CE, FunctionDecl *FD); 1672 1673 /// Helpers for dealing with blocks and functions. 1674 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1675 bool CheckParameterNames); 1676 void CheckCXXDefaultArguments(FunctionDecl *FD); 1677 void CheckExtraCXXDefaultArguments(Declarator &D); 1678 Scope *getNonFieldDeclScope(Scope *S); 1679 1680 /// \name Name lookup 1681 /// 1682 /// These routines provide name lookup that is used during semantic 1683 /// analysis to resolve the various kinds of names (identifiers, 1684 /// overloaded operator names, constructor names, etc.) into zero or 1685 /// more declarations within a particular scope. The major entry 1686 /// points are LookupName, which performs unqualified name lookup, 1687 /// and LookupQualifiedName, which performs qualified name lookup. 1688 /// 1689 /// All name lookup is performed based on some specific criteria, 1690 /// which specify what names will be visible to name lookup and how 1691 /// far name lookup should work. These criteria are important both 1692 /// for capturing language semantics (certain lookups will ignore 1693 /// certain names, for example) and for performance, since name 1694 /// lookup is often a bottleneck in the compilation of C++. Name 1695 /// lookup criteria is specified via the LookupCriteria enumeration. 1696 /// 1697 /// The results of name lookup can vary based on the kind of name 1698 /// lookup performed, the current language, and the translation 1699 /// unit. In C, for example, name lookup will either return nothing 1700 /// (no entity found) or a single declaration. In C++, name lookup 1701 /// can additionally refer to a set of overloaded functions or 1702 /// result in an ambiguity. All of the possible results of name 1703 /// lookup are captured by the LookupResult class, which provides 1704 /// the ability to distinguish among them. 1705 //@{ 1706 1707 /// @brief Describes the kind of name lookup to perform. 1708 enum LookupNameKind { 1709 /// Ordinary name lookup, which finds ordinary names (functions, 1710 /// variables, typedefs, etc.) in C and most kinds of names 1711 /// (functions, variables, members, types, etc.) in C++. 1712 LookupOrdinaryName = 0, 1713 /// Tag name lookup, which finds the names of enums, classes, 1714 /// structs, and unions. 1715 LookupTagName, 1716 /// Label name lookup. 1717 LookupLabel, 1718 /// Member name lookup, which finds the names of 1719 /// class/struct/union members. 1720 LookupMemberName, 1721 /// Look up of an operator name (e.g., operator+) for use with 1722 /// operator overloading. This lookup is similar to ordinary name 1723 /// lookup, but will ignore any declarations that are class members. 1724 LookupOperatorName, 1725 /// Look up of a name that precedes the '::' scope resolution 1726 /// operator in C++. This lookup completely ignores operator, object, 1727 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1728 LookupNestedNameSpecifierName, 1729 /// Look up a namespace name within a C++ using directive or 1730 /// namespace alias definition, ignoring non-namespace names (C++ 1731 /// [basic.lookup.udir]p1). 1732 LookupNamespaceName, 1733 /// Look up all declarations in a scope with the given name, 1734 /// including resolved using declarations. This is appropriate 1735 /// for checking redeclarations for a using declaration. 1736 LookupUsingDeclName, 1737 /// Look up an ordinary name that is going to be redeclared as a 1738 /// name with linkage. This lookup ignores any declarations that 1739 /// are outside of the current scope unless they have linkage. See 1740 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1741 LookupRedeclarationWithLinkage, 1742 /// Look up the name of an Objective-C protocol. 1743 LookupObjCProtocolName, 1744 /// Look up implicit 'self' parameter of an objective-c method. 1745 LookupObjCImplicitSelfParam, 1746 /// \brief Look up any declaration with any name. 1747 LookupAnyName 1748 }; 1749 1750 /// \brief Specifies whether (or how) name lookup is being performed for a 1751 /// redeclaration (vs. a reference). 1752 enum RedeclarationKind { 1753 /// \brief The lookup is a reference to this name that is not for the 1754 /// purpose of redeclaring the name. 1755 NotForRedeclaration = 0, 1756 /// \brief The lookup results will be used for redeclaration of a name, 1757 /// if an entity by that name already exists. 1758 ForRedeclaration 1759 }; 1760 1761private: 1762 bool CppLookupName(LookupResult &R, Scope *S); 1763 1764 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1765 CXXSpecialMember SM, 1766 bool ConstArg, 1767 bool VolatileArg, 1768 bool RValueThis, 1769 bool ConstThis, 1770 bool VolatileThis); 1771 1772 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1773 // 1774 // The boolean value will be true to indicate that the namespace was loaded 1775 // from an AST/PCH file, or false otherwise. 1776 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1777 1778 /// \brief Whether we have already loaded known namespaces from an extenal 1779 /// source. 1780 bool LoadedExternalKnownNamespaces; 1781 1782public: 1783 /// \brief Look up a name, looking for a single declaration. Return 1784 /// null if the results were absent, ambiguous, or overloaded. 1785 /// 1786 /// It is preferable to use the elaborated form and explicitly handle 1787 /// ambiguity and overloaded. 1788 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1789 SourceLocation Loc, 1790 LookupNameKind NameKind, 1791 RedeclarationKind Redecl 1792 = NotForRedeclaration); 1793 bool LookupName(LookupResult &R, Scope *S, 1794 bool AllowBuiltinCreation = false); 1795 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1796 bool InUnqualifiedLookup = false); 1797 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1798 bool AllowBuiltinCreation = false, 1799 bool EnteringContext = false); 1800 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1801 RedeclarationKind Redecl 1802 = NotForRedeclaration); 1803 1804 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1805 QualType T1, QualType T2, 1806 UnresolvedSetImpl &Functions); 1807 1808 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1809 SourceLocation GnuLabelLoc = SourceLocation()); 1810 1811 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1812 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1813 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1814 unsigned Quals, 1815 bool *ConstParam = 0); 1816 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1817 bool RValueThis, unsigned ThisQuals, 1818 bool *ConstParam = 0); 1819 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1820 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1821 unsigned ThisQuals); 1822 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1823 1824 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1825 Expr **Args, unsigned NumArgs, 1826 ADLResult &Functions, 1827 bool StdNamespaceIsAssociated = false); 1828 1829 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1830 VisibleDeclConsumer &Consumer, 1831 bool IncludeGlobalScope = true); 1832 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1833 VisibleDeclConsumer &Consumer, 1834 bool IncludeGlobalScope = true); 1835 1836 /// \brief The context in which typo-correction occurs. 1837 /// 1838 /// The typo-correction context affects which keywords (if any) are 1839 /// considered when trying to correct for typos. 1840 enum CorrectTypoContext { 1841 /// \brief An unknown context, where any keyword might be valid. 1842 CTC_Unknown, 1843 /// \brief A context where no keywords are used (e.g. we expect an actual 1844 /// name). 1845 CTC_NoKeywords, 1846 /// \brief A context where we're correcting a type name. 1847 CTC_Type, 1848 /// \brief An expression context. 1849 CTC_Expression, 1850 /// \brief A type cast, or anything else that can be followed by a '<'. 1851 CTC_CXXCasts, 1852 /// \brief A member lookup context. 1853 CTC_MemberLookup, 1854 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1855 CTC_ObjCIvarLookup, 1856 /// \brief An Objective-C property lookup context (e.g., self.prop). 1857 CTC_ObjCPropertyLookup, 1858 /// \brief The receiver of an Objective-C message send within an 1859 /// Objective-C method where 'super' is a valid keyword. 1860 CTC_ObjCMessageReceiver 1861 }; 1862 1863 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1864 Sema::LookupNameKind LookupKind, 1865 Scope *S, CXXScopeSpec *SS, 1866 DeclContext *MemberContext = 0, 1867 bool EnteringContext = false, 1868 CorrectTypoContext CTC = CTC_Unknown, 1869 const ObjCObjectPointerType *OPT = 0); 1870 1871 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1872 Sema::LookupNameKind LookupKind, 1873 Scope *S, CXXScopeSpec *SS, 1874 CorrectionCandidateCallback *CCC, 1875 DeclContext *MemberContext = 0, 1876 bool EnteringContext = false, 1877 const ObjCObjectPointerType *OPT = 0); 1878 1879 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1880 AssociatedNamespaceSet &AssociatedNamespaces, 1881 AssociatedClassSet &AssociatedClasses); 1882 1883 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1884 bool ConsiderLinkage, 1885 bool ExplicitInstantiationOrSpecialization); 1886 1887 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1888 //@} 1889 1890 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1891 SourceLocation IdLoc, 1892 bool TypoCorrection = false); 1893 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1894 Scope *S, bool ForRedeclaration, 1895 SourceLocation Loc); 1896 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1897 Scope *S); 1898 void AddKnownFunctionAttributes(FunctionDecl *FD); 1899 1900 // More parsing and symbol table subroutines. 1901 1902 // Decl attributes - this routine is the top level dispatcher. 1903 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1904 bool NonInheritable = true, bool Inheritable = true); 1905 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1906 bool NonInheritable = true, bool Inheritable = true); 1907 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1908 const AttributeList *AttrList); 1909 1910 void checkUnusedDeclAttributes(Declarator &D); 1911 1912 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1913 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1914 bool CheckNoReturnAttr(const AttributeList &attr); 1915 1916 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1917 bool &IncompleteImpl, unsigned DiagID); 1918 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1919 ObjCMethodDecl *MethodDecl, 1920 bool IsProtocolMethodDecl); 1921 1922 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1923 ObjCMethodDecl *Overridden, 1924 bool IsProtocolMethodDecl); 1925 1926 /// WarnExactTypedMethods - This routine issues a warning if method 1927 /// implementation declaration matches exactly that of its declaration. 1928 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1929 ObjCMethodDecl *MethodDecl, 1930 bool IsProtocolMethodDecl); 1931 1932 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1933 ObjCInterfaceDecl *IDecl); 1934 1935 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1936 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1937 1938 /// CheckProtocolMethodDefs - This routine checks unimplemented 1939 /// methods declared in protocol, and those referenced by it. 1940 /// \param IDecl - Used for checking for methods which may have been 1941 /// inherited. 1942 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1943 ObjCProtocolDecl *PDecl, 1944 bool& IncompleteImpl, 1945 const SelectorSet &InsMap, 1946 const SelectorSet &ClsMap, 1947 ObjCContainerDecl *CDecl); 1948 1949 /// CheckImplementationIvars - This routine checks if the instance variables 1950 /// listed in the implelementation match those listed in the interface. 1951 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1952 ObjCIvarDecl **Fields, unsigned nIvars, 1953 SourceLocation Loc); 1954 1955 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1956 /// remains unimplemented in the class or category @implementation. 1957 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1958 ObjCContainerDecl* IDecl, 1959 bool IncompleteImpl = false); 1960 1961 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1962 /// which must be implemented by this implementation. 1963 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1964 ObjCContainerDecl *CDecl, 1965 const SelectorSet &InsMap); 1966 1967 /// DefaultSynthesizeProperties - This routine default synthesizes all 1968 /// properties which must be synthesized in class's @implementation. 1969 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1970 ObjCInterfaceDecl *IDecl); 1971 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1972 1973 /// CollectImmediateProperties - This routine collects all properties in 1974 /// the class and its conforming protocols; but not those it its super class. 1975 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1976 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1977 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1978 1979 1980 /// LookupPropertyDecl - Looks up a property in the current class and all 1981 /// its protocols. 1982 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1983 IdentifierInfo *II); 1984 1985 /// Called by ActOnProperty to handle @property declarations in 1986 //// class extensions. 1987 Decl *HandlePropertyInClassExtension(Scope *S, 1988 SourceLocation AtLoc, 1989 FieldDeclarator &FD, 1990 Selector GetterSel, 1991 Selector SetterSel, 1992 const bool isAssign, 1993 const bool isReadWrite, 1994 const unsigned Attributes, 1995 const unsigned AttributesAsWritten, 1996 bool *isOverridingProperty, 1997 TypeSourceInfo *T, 1998 tok::ObjCKeywordKind MethodImplKind); 1999 2000 /// Called by ActOnProperty and HandlePropertyInClassExtension to 2001 /// handle creating the ObjcPropertyDecl for a category or @interface. 2002 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 2003 ObjCContainerDecl *CDecl, 2004 SourceLocation AtLoc, 2005 FieldDeclarator &FD, 2006 Selector GetterSel, 2007 Selector SetterSel, 2008 const bool isAssign, 2009 const bool isReadWrite, 2010 const unsigned Attributes, 2011 const unsigned AttributesAsWritten, 2012 TypeSourceInfo *T, 2013 tok::ObjCKeywordKind MethodImplKind, 2014 DeclContext *lexicalDC = 0); 2015 2016 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2017 /// warning) when atomic property has one but not the other user-declared 2018 /// setter or getter. 2019 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2020 ObjCContainerDecl* IDecl); 2021 2022 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2023 2024 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2025 2026 enum MethodMatchStrategy { 2027 MMS_loose, 2028 MMS_strict 2029 }; 2030 2031 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2032 /// true, or false, accordingly. 2033 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2034 const ObjCMethodDecl *PrevMethod, 2035 MethodMatchStrategy strategy = MMS_strict); 2036 2037 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2038 /// or protocol against those declared in their implementations. 2039 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2040 const SelectorSet &ClsMap, 2041 SelectorSet &InsMapSeen, 2042 SelectorSet &ClsMapSeen, 2043 ObjCImplDecl* IMPDecl, 2044 ObjCContainerDecl* IDecl, 2045 bool &IncompleteImpl, 2046 bool ImmediateClass, 2047 bool WarnExactMatch=false); 2048 2049 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2050 /// category matches with those implemented in its primary class and 2051 /// warns each time an exact match is found. 2052 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2053 2054private: 2055 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2056 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2057 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2058 2059 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2060 /// optionally warns if there are multiple signatures. 2061 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2062 bool receiverIdOrClass, 2063 bool warn, bool instance); 2064 2065public: 2066 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2067 /// unit are added to a global pool. This allows us to efficiently associate 2068 /// a selector with a method declaraation for purposes of typechecking 2069 /// messages sent to "id" (where the class of the object is unknown). 2070 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2071 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2072 } 2073 2074 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2075 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2076 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2077 } 2078 2079 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2080 /// pool. 2081 void AddAnyMethodToGlobalPool(Decl *D); 2082 2083 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2084 /// there are multiple signatures. 2085 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2086 bool receiverIdOrClass=false, 2087 bool warn=true) { 2088 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2089 warn, /*instance*/true); 2090 } 2091 2092 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2093 /// there are multiple signatures. 2094 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2095 bool receiverIdOrClass=false, 2096 bool warn=true) { 2097 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2098 warn, /*instance*/false); 2099 } 2100 2101 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2102 /// implementation. 2103 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2104 2105 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2106 /// initialization. 2107 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2108 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2109 2110 //===--------------------------------------------------------------------===// 2111 // Statement Parsing Callbacks: SemaStmt.cpp. 2112public: 2113 class FullExprArg { 2114 public: 2115 FullExprArg(Sema &actions) : E(0) { } 2116 2117 // FIXME: The const_cast here is ugly. RValue references would make this 2118 // much nicer (or we could duplicate a bunch of the move semantics 2119 // emulation code from Ownership.h). 2120 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2121 2122 ExprResult release() { 2123 return move(E); 2124 } 2125 2126 Expr *get() const { return E; } 2127 2128 Expr *operator->() { 2129 return E; 2130 } 2131 2132 private: 2133 // FIXME: No need to make the entire Sema class a friend when it's just 2134 // Sema::MakeFullExpr that needs access to the constructor below. 2135 friend class Sema; 2136 2137 explicit FullExprArg(Expr *expr) : E(expr) {} 2138 2139 Expr *E; 2140 }; 2141 2142 FullExprArg MakeFullExpr(Expr *Arg) { 2143 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2144 } 2145 2146 StmtResult ActOnExprStmt(FullExprArg Expr); 2147 2148 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2149 bool HasLeadingEmptyMacro = false); 2150 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2151 MultiStmtArg Elts, 2152 bool isStmtExpr); 2153 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2154 SourceLocation StartLoc, 2155 SourceLocation EndLoc); 2156 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2157 StmtResult ActOnForEachLValueExpr(Expr *E); 2158 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2159 SourceLocation DotDotDotLoc, Expr *RHSVal, 2160 SourceLocation ColonLoc); 2161 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2162 2163 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2164 SourceLocation ColonLoc, 2165 Stmt *SubStmt, Scope *CurScope); 2166 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2167 SourceLocation ColonLoc, Stmt *SubStmt); 2168 2169 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2170 FullExprArg CondVal, Decl *CondVar, 2171 Stmt *ThenVal, 2172 SourceLocation ElseLoc, Stmt *ElseVal); 2173 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2174 Expr *Cond, 2175 Decl *CondVar); 2176 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2177 Stmt *Switch, Stmt *Body); 2178 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2179 FullExprArg Cond, 2180 Decl *CondVar, Stmt *Body); 2181 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2182 SourceLocation WhileLoc, 2183 SourceLocation CondLParen, Expr *Cond, 2184 SourceLocation CondRParen); 2185 2186 StmtResult ActOnForStmt(SourceLocation ForLoc, 2187 SourceLocation LParenLoc, 2188 Stmt *First, FullExprArg Second, 2189 Decl *SecondVar, 2190 FullExprArg Third, 2191 SourceLocation RParenLoc, 2192 Stmt *Body); 2193 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2194 Expr *collection); 2195 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2196 SourceLocation LParenLoc, 2197 Stmt *First, Expr *Second, 2198 SourceLocation RParenLoc, Stmt *Body); 2199 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2200 SourceLocation LParenLoc, Stmt *LoopVar, 2201 SourceLocation ColonLoc, Expr *Collection, 2202 SourceLocation RParenLoc); 2203 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2204 SourceLocation ColonLoc, 2205 Stmt *RangeDecl, Stmt *BeginEndDecl, 2206 Expr *Cond, Expr *Inc, 2207 Stmt *LoopVarDecl, 2208 SourceLocation RParenLoc); 2209 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2210 2211 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2212 SourceLocation LabelLoc, 2213 LabelDecl *TheDecl); 2214 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2215 SourceLocation StarLoc, 2216 Expr *DestExp); 2217 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2218 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2219 2220 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2221 bool AllowFunctionParameters); 2222 2223 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2224 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2225 2226 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2227 bool IsSimple, bool IsVolatile, 2228 unsigned NumOutputs, unsigned NumInputs, 2229 IdentifierInfo **Names, 2230 MultiExprArg Constraints, 2231 MultiExprArg Exprs, 2232 Expr *AsmString, 2233 MultiExprArg Clobbers, 2234 SourceLocation RParenLoc, 2235 bool MSAsm = false); 2236 2237 2238 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2239 SourceLocation StartLoc, 2240 SourceLocation IdLoc, IdentifierInfo *Id, 2241 bool Invalid = false); 2242 2243 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2244 2245 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2246 Decl *Parm, Stmt *Body); 2247 2248 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2249 2250 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2251 MultiStmtArg Catch, Stmt *Finally); 2252 2253 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2254 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2255 Scope *CurScope); 2256 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2257 Expr *operand); 2258 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2259 Expr *SynchExpr, 2260 Stmt *SynchBody); 2261 2262 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2263 2264 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2265 SourceLocation StartLoc, 2266 SourceLocation IdLoc, 2267 IdentifierInfo *Id); 2268 2269 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2270 2271 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2272 Decl *ExDecl, Stmt *HandlerBlock); 2273 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2274 MultiStmtArg Handlers); 2275 2276 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2277 SourceLocation TryLoc, 2278 Stmt *TryBlock, 2279 Stmt *Handler); 2280 2281 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2282 Expr *FilterExpr, 2283 Stmt *Block); 2284 2285 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2286 Stmt *Block); 2287 2288 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2289 2290 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2291 2292 /// \brief If it's a file scoped decl that must warn if not used, keep track 2293 /// of it. 2294 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2295 2296 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2297 /// whose result is unused, warn. 2298 void DiagnoseUnusedExprResult(const Stmt *S); 2299 void DiagnoseUnusedDecl(const NamedDecl *ND); 2300 2301 ParsingDeclState PushParsingDeclaration() { 2302 return DelayedDiagnostics.pushParsingDecl(); 2303 } 2304 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2305 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2306 } 2307 2308 typedef ProcessingContextState ParsingClassState; 2309 ParsingClassState PushParsingClass() { 2310 return DelayedDiagnostics.pushContext(); 2311 } 2312 void PopParsingClass(ParsingClassState state) { 2313 DelayedDiagnostics.popContext(state); 2314 } 2315 2316 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2317 SourceLocation Loc, 2318 const ObjCInterfaceDecl *UnknownObjCClass=0); 2319 2320 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2321 2322 bool makeUnavailableInSystemHeader(SourceLocation loc, 2323 StringRef message); 2324 2325 //===--------------------------------------------------------------------===// 2326 // Expression Parsing Callbacks: SemaExpr.cpp. 2327 2328 bool CanUseDecl(NamedDecl *D); 2329 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2330 const ObjCInterfaceDecl *UnknownObjCClass=0); 2331 AvailabilityResult DiagnoseAvailabilityOfDecl(NamedDecl *D, 2332 SourceLocation Loc, 2333 const ObjCInterfaceDecl *UnknownObjCClass); 2334 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2335 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2336 ObjCMethodDecl *Getter, 2337 SourceLocation Loc); 2338 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2339 Expr **Args, unsigned NumArgs); 2340 2341 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2342 2343 void PopExpressionEvaluationContext(); 2344 2345 void DiscardCleanupsInEvaluationContext(); 2346 2347 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2348 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2349 void MarkDeclarationsReferencedInExpr(Expr *E); 2350 2351 /// \brief Try to recover by turning the given expression into a 2352 /// call. Returns true if recovery was attempted or an error was 2353 /// emitted; this may also leave the ExprResult invalid. 2354 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2355 bool ForceComplain = false, 2356 bool (*IsPlausibleResult)(QualType) = 0); 2357 2358 /// \brief Figure out if an expression could be turned into a call. 2359 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2360 UnresolvedSetImpl &NonTemplateOverloads); 2361 2362 /// \brief Conditionally issue a diagnostic based on the current 2363 /// evaluation context. 2364 /// 2365 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2366 /// the function body is parsed, and then do a basic reachability analysis to 2367 /// determine if the statement is reachable. If it is unreachable, the 2368 /// diagnostic will not be emitted. 2369 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2370 const PartialDiagnostic &PD); 2371 2372 // Primary Expressions. 2373 SourceRange getExprRange(Expr *E) const; 2374 2375 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2376 bool HasTrailingLParen, bool IsAddressOfOperand); 2377 2378 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2379 TemplateArgumentListInfo &Buffer, 2380 DeclarationNameInfo &NameInfo, 2381 const TemplateArgumentListInfo *&TemplateArgs); 2382 2383 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2384 CorrectionCandidateCallback &CCC, 2385 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2386 Expr **Args = 0, unsigned NumArgs = 0); 2387 2388 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2389 IdentifierInfo *II, 2390 bool AllowBuiltinCreation=false); 2391 2392 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2393 const DeclarationNameInfo &NameInfo, 2394 bool isAddressOfOperand, 2395 const TemplateArgumentListInfo *TemplateArgs); 2396 2397 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2398 ExprValueKind VK, 2399 SourceLocation Loc, 2400 const CXXScopeSpec *SS = 0); 2401 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2402 ExprValueKind VK, 2403 const DeclarationNameInfo &NameInfo, 2404 const CXXScopeSpec *SS = 0); 2405 ExprResult 2406 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2407 SourceLocation nameLoc, 2408 IndirectFieldDecl *indirectField, 2409 Expr *baseObjectExpr = 0, 2410 SourceLocation opLoc = SourceLocation()); 2411 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2412 LookupResult &R, 2413 const TemplateArgumentListInfo *TemplateArgs); 2414 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2415 LookupResult &R, 2416 const TemplateArgumentListInfo *TemplateArgs, 2417 bool IsDefiniteInstance); 2418 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2419 const LookupResult &R, 2420 bool HasTrailingLParen); 2421 2422 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2423 const DeclarationNameInfo &NameInfo); 2424 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2425 const DeclarationNameInfo &NameInfo, 2426 const TemplateArgumentListInfo *TemplateArgs); 2427 2428 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2429 LookupResult &R, 2430 bool NeedsADL); 2431 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2432 const DeclarationNameInfo &NameInfo, 2433 NamedDecl *D); 2434 2435 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2436 ExprResult ActOnNumericConstant(const Token &Tok); 2437 ExprResult ActOnCharacterConstant(const Token &Tok); 2438 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2439 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2440 SourceLocation R, 2441 MultiExprArg Val); 2442 2443 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2444 /// fragments (e.g. "foo" "bar" L"baz"). 2445 ExprResult ActOnStringLiteral(const Token *StringToks, 2446 unsigned NumStringToks); 2447 2448 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2449 SourceLocation DefaultLoc, 2450 SourceLocation RParenLoc, 2451 Expr *ControllingExpr, 2452 MultiTypeArg ArgTypes, 2453 MultiExprArg ArgExprs); 2454 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2455 SourceLocation DefaultLoc, 2456 SourceLocation RParenLoc, 2457 Expr *ControllingExpr, 2458 TypeSourceInfo **Types, 2459 Expr **Exprs, 2460 unsigned NumAssocs); 2461 2462 // Binary/Unary Operators. 'Tok' is the token for the operator. 2463 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2464 Expr *InputExpr); 2465 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2466 UnaryOperatorKind Opc, Expr *Input); 2467 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2468 tok::TokenKind Op, Expr *Input); 2469 2470 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2471 SourceLocation OpLoc, 2472 UnaryExprOrTypeTrait ExprKind, 2473 SourceRange R); 2474 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2475 UnaryExprOrTypeTrait ExprKind); 2476 ExprResult 2477 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2478 UnaryExprOrTypeTrait ExprKind, 2479 bool IsType, void *TyOrEx, 2480 const SourceRange &ArgRange); 2481 2482 ExprResult CheckPlaceholderExpr(Expr *E); 2483 bool CheckVecStepExpr(Expr *E); 2484 2485 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2486 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2487 SourceRange ExprRange, 2488 UnaryExprOrTypeTrait ExprKind); 2489 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2490 SourceLocation OpLoc, 2491 IdentifierInfo &Name, 2492 SourceLocation NameLoc, 2493 SourceLocation RParenLoc); 2494 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2495 tok::TokenKind Kind, Expr *Input); 2496 2497 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2498 Expr *Idx, SourceLocation RLoc); 2499 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2500 Expr *Idx, SourceLocation RLoc); 2501 2502 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2503 SourceLocation OpLoc, bool IsArrow, 2504 CXXScopeSpec &SS, 2505 NamedDecl *FirstQualifierInScope, 2506 const DeclarationNameInfo &NameInfo, 2507 const TemplateArgumentListInfo *TemplateArgs); 2508 2509 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2510 SourceLocation OpLoc, bool IsArrow, 2511 const CXXScopeSpec &SS, 2512 NamedDecl *FirstQualifierInScope, 2513 LookupResult &R, 2514 const TemplateArgumentListInfo *TemplateArgs, 2515 bool SuppressQualifierCheck = false); 2516 2517 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2518 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2519 bool &IsArrow, SourceLocation OpLoc, 2520 CXXScopeSpec &SS, 2521 Decl *ObjCImpDecl, 2522 bool HasTemplateArgs); 2523 2524 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2525 const CXXScopeSpec &SS, 2526 const LookupResult &R); 2527 2528 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2529 bool IsArrow, SourceLocation OpLoc, 2530 const CXXScopeSpec &SS, 2531 NamedDecl *FirstQualifierInScope, 2532 const DeclarationNameInfo &NameInfo, 2533 const TemplateArgumentListInfo *TemplateArgs); 2534 2535 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2536 SourceLocation OpLoc, 2537 tok::TokenKind OpKind, 2538 CXXScopeSpec &SS, 2539 UnqualifiedId &Member, 2540 Decl *ObjCImpDecl, 2541 bool HasTrailingLParen); 2542 2543 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2544 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2545 FunctionDecl *FDecl, 2546 const FunctionProtoType *Proto, 2547 Expr **Args, unsigned NumArgs, 2548 SourceLocation RParenLoc, 2549 bool ExecConfig = false); 2550 void CheckStaticArrayArgument(SourceLocation CallLoc, 2551 ParmVarDecl *Param, 2552 const Expr *ArgExpr); 2553 2554 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2555 /// This provides the location of the left/right parens and a list of comma 2556 /// locations. 2557 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2558 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2559 Expr *ExecConfig = 0, bool IsExecConfig = false); 2560 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2561 SourceLocation LParenLoc, 2562 Expr **Args, unsigned NumArgs, 2563 SourceLocation RParenLoc, 2564 Expr *Config = 0, 2565 bool IsExecConfig = false); 2566 2567 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2568 MultiExprArg ExecConfig, 2569 SourceLocation GGGLoc); 2570 2571 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2572 Declarator &D, ParsedType &Ty, 2573 SourceLocation RParenLoc, Expr *CastExpr); 2574 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2575 TypeSourceInfo *Ty, 2576 SourceLocation RParenLoc, 2577 Expr *Op); 2578 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2579 2580 /// \brief Build an altivec or OpenCL literal. 2581 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2582 SourceLocation RParenLoc, Expr *E, 2583 TypeSourceInfo *TInfo); 2584 2585 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2586 2587 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2588 ParsedType Ty, 2589 SourceLocation RParenLoc, 2590 Expr *InitExpr); 2591 2592 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2593 TypeSourceInfo *TInfo, 2594 SourceLocation RParenLoc, 2595 Expr *LiteralExpr); 2596 2597 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2598 MultiExprArg InitArgList, 2599 SourceLocation RBraceLoc); 2600 2601 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2602 SourceLocation Loc, 2603 bool GNUSyntax, 2604 ExprResult Init); 2605 2606 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2607 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2608 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2609 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2610 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2611 Expr *LHSExpr, Expr *RHSExpr); 2612 2613 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2614 /// in the case of a the GNU conditional expr extension. 2615 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2616 SourceLocation ColonLoc, 2617 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2618 2619 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2620 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2621 LabelDecl *TheDecl); 2622 2623 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2624 SourceLocation RPLoc); // "({..})" 2625 2626 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2627 struct OffsetOfComponent { 2628 SourceLocation LocStart, LocEnd; 2629 bool isBrackets; // true if [expr], false if .ident 2630 union { 2631 IdentifierInfo *IdentInfo; 2632 Expr *E; 2633 } U; 2634 }; 2635 2636 /// __builtin_offsetof(type, a.b[123][456].c) 2637 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2638 TypeSourceInfo *TInfo, 2639 OffsetOfComponent *CompPtr, 2640 unsigned NumComponents, 2641 SourceLocation RParenLoc); 2642 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2643 SourceLocation BuiltinLoc, 2644 SourceLocation TypeLoc, 2645 ParsedType ParsedArgTy, 2646 OffsetOfComponent *CompPtr, 2647 unsigned NumComponents, 2648 SourceLocation RParenLoc); 2649 2650 // __builtin_choose_expr(constExpr, expr1, expr2) 2651 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2652 Expr *CondExpr, Expr *LHSExpr, 2653 Expr *RHSExpr, SourceLocation RPLoc); 2654 2655 // __builtin_va_arg(expr, type) 2656 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2657 SourceLocation RPLoc); 2658 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2659 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2660 2661 // __null 2662 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2663 2664 bool CheckCaseExpression(Expr *E); 2665 2666 /// \brief Describes the result of an "if-exists" condition check. 2667 enum IfExistsResult { 2668 /// \brief The symbol exists. 2669 IER_Exists, 2670 2671 /// \brief The symbol does not exist. 2672 IER_DoesNotExist, 2673 2674 /// \brief The name is a dependent name, so the results will differ 2675 /// from one instantiation to the next. 2676 IER_Dependent, 2677 2678 /// \brief An error occurred. 2679 IER_Error 2680 }; 2681 2682 IfExistsResult 2683 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2684 const DeclarationNameInfo &TargetNameInfo); 2685 2686 IfExistsResult 2687 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2688 bool IsIfExists, CXXScopeSpec &SS, 2689 UnqualifiedId &Name); 2690 2691 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2692 bool IsIfExists, 2693 NestedNameSpecifierLoc QualifierLoc, 2694 DeclarationNameInfo NameInfo, 2695 Stmt *Nested); 2696 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2697 bool IsIfExists, 2698 CXXScopeSpec &SS, UnqualifiedId &Name, 2699 Stmt *Nested); 2700 2701 //===------------------------- "Block" Extension ------------------------===// 2702 2703 /// ActOnBlockStart - This callback is invoked when a block literal is 2704 /// started. 2705 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2706 2707 /// ActOnBlockArguments - This callback allows processing of block arguments. 2708 /// If there are no arguments, this is still invoked. 2709 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2710 2711 /// ActOnBlockError - If there is an error parsing a block, this callback 2712 /// is invoked to pop the information about the block from the action impl. 2713 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2714 2715 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2716 /// literal was successfully completed. ^(int x){...} 2717 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2718 Scope *CurScope); 2719 2720 //===---------------------------- OpenCL Features -----------------------===// 2721 2722 /// __builtin_astype(...) 2723 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2724 SourceLocation BuiltinLoc, 2725 SourceLocation RParenLoc); 2726 2727 //===---------------------------- C++ Features --------------------------===// 2728 2729 // Act on C++ namespaces 2730 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2731 SourceLocation NamespaceLoc, 2732 SourceLocation IdentLoc, 2733 IdentifierInfo *Ident, 2734 SourceLocation LBrace, 2735 AttributeList *AttrList); 2736 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2737 2738 NamespaceDecl *getStdNamespace() const; 2739 NamespaceDecl *getOrCreateStdNamespace(); 2740 2741 CXXRecordDecl *getStdBadAlloc() const; 2742 2743 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2744 /// it is and Element is not NULL, assigns the element type to Element. 2745 bool isStdInitializerList(QualType Ty, QualType *Element); 2746 2747 /// \brief Looks for the std::initializer_list template and instantiates it 2748 /// with Element, or emits an error if it's not found. 2749 /// 2750 /// \returns The instantiated template, or null on error. 2751 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2752 2753 /// \brief Determine whether Ctor is an initializer-list constructor, as 2754 /// defined in [dcl.init.list]p2. 2755 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2756 2757 Decl *ActOnUsingDirective(Scope *CurScope, 2758 SourceLocation UsingLoc, 2759 SourceLocation NamespcLoc, 2760 CXXScopeSpec &SS, 2761 SourceLocation IdentLoc, 2762 IdentifierInfo *NamespcName, 2763 AttributeList *AttrList); 2764 2765 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2766 2767 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2768 SourceLocation NamespaceLoc, 2769 SourceLocation AliasLoc, 2770 IdentifierInfo *Alias, 2771 CXXScopeSpec &SS, 2772 SourceLocation IdentLoc, 2773 IdentifierInfo *Ident); 2774 2775 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2776 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2777 const LookupResult &PreviousDecls); 2778 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2779 NamedDecl *Target); 2780 2781 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2782 bool isTypeName, 2783 const CXXScopeSpec &SS, 2784 SourceLocation NameLoc, 2785 const LookupResult &Previous); 2786 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2787 const CXXScopeSpec &SS, 2788 SourceLocation NameLoc); 2789 2790 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2791 SourceLocation UsingLoc, 2792 CXXScopeSpec &SS, 2793 const DeclarationNameInfo &NameInfo, 2794 AttributeList *AttrList, 2795 bool IsInstantiation, 2796 bool IsTypeName, 2797 SourceLocation TypenameLoc); 2798 2799 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2800 2801 Decl *ActOnUsingDeclaration(Scope *CurScope, 2802 AccessSpecifier AS, 2803 bool HasUsingKeyword, 2804 SourceLocation UsingLoc, 2805 CXXScopeSpec &SS, 2806 UnqualifiedId &Name, 2807 AttributeList *AttrList, 2808 bool IsTypeName, 2809 SourceLocation TypenameLoc); 2810 Decl *ActOnAliasDeclaration(Scope *CurScope, 2811 AccessSpecifier AS, 2812 MultiTemplateParamsArg TemplateParams, 2813 SourceLocation UsingLoc, 2814 UnqualifiedId &Name, 2815 TypeResult Type); 2816 2817 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2818 /// ActOnDeclarator, when a C++ direct initializer is present. 2819 /// e.g: "int x(1);" 2820 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2821 SourceLocation LParenLoc, 2822 MultiExprArg Exprs, 2823 SourceLocation RParenLoc, 2824 bool TypeMayContainAuto); 2825 2826 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2827 /// and sets it as the initializer for the the passed in VarDecl. 2828 bool InitializeVarWithConstructor(VarDecl *VD, 2829 CXXConstructorDecl *Constructor, 2830 MultiExprArg Exprs, 2831 bool HadMultipleCandidates); 2832 2833 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2834 /// including handling of its default argument expressions. 2835 /// 2836 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2837 ExprResult 2838 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2839 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2840 bool HadMultipleCandidates, bool RequiresZeroInit, 2841 unsigned ConstructKind, SourceRange ParenRange); 2842 2843 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2844 // the constructor can be elidable? 2845 ExprResult 2846 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2847 CXXConstructorDecl *Constructor, bool Elidable, 2848 MultiExprArg Exprs, bool HadMultipleCandidates, 2849 bool RequiresZeroInit, unsigned ConstructKind, 2850 SourceRange ParenRange); 2851 2852 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2853 /// the default expr if needed. 2854 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2855 FunctionDecl *FD, 2856 ParmVarDecl *Param); 2857 2858 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2859 /// constructed variable. 2860 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2861 2862 /// \brief Helper class that collects exception specifications for 2863 /// implicitly-declared special member functions. 2864 class ImplicitExceptionSpecification { 2865 // Pointer to allow copying 2866 ASTContext *Context; 2867 // We order exception specifications thus: 2868 // noexcept is the most restrictive, but is only used in C++0x. 2869 // throw() comes next. 2870 // Then a throw(collected exceptions) 2871 // Finally no specification. 2872 // throw(...) is used instead if any called function uses it. 2873 // 2874 // If this exception specification cannot be known yet (for instance, 2875 // because this is the exception specification for a defaulted default 2876 // constructor and we haven't finished parsing the deferred parts of the 2877 // class yet), the C++0x standard does not specify how to behave. We 2878 // record this as an 'unknown' exception specification, which overrules 2879 // any other specification (even 'none', to keep this rule simple). 2880 ExceptionSpecificationType ComputedEST; 2881 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2882 SmallVector<QualType, 4> Exceptions; 2883 2884 void ClearExceptions() { 2885 ExceptionsSeen.clear(); 2886 Exceptions.clear(); 2887 } 2888 2889 public: 2890 explicit ImplicitExceptionSpecification(ASTContext &Context) 2891 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2892 if (!Context.getLangOptions().CPlusPlus0x) 2893 ComputedEST = EST_DynamicNone; 2894 } 2895 2896 /// \brief Get the computed exception specification type. 2897 ExceptionSpecificationType getExceptionSpecType() const { 2898 assert(ComputedEST != EST_ComputedNoexcept && 2899 "noexcept(expr) should not be a possible result"); 2900 return ComputedEST; 2901 } 2902 2903 /// \brief The number of exceptions in the exception specification. 2904 unsigned size() const { return Exceptions.size(); } 2905 2906 /// \brief The set of exceptions in the exception specification. 2907 const QualType *data() const { return Exceptions.data(); } 2908 2909 /// \brief Integrate another called method into the collected data. 2910 void CalledDecl(CXXMethodDecl *Method); 2911 2912 /// \brief Integrate an invoked expression into the collected data. 2913 void CalledExpr(Expr *E); 2914 2915 /// \brief Specify that the exception specification can't be detemined yet. 2916 void SetDelayed() { 2917 ClearExceptions(); 2918 ComputedEST = EST_Delayed; 2919 } 2920 2921 FunctionProtoType::ExtProtoInfo getEPI() const { 2922 FunctionProtoType::ExtProtoInfo EPI; 2923 EPI.ExceptionSpecType = getExceptionSpecType(); 2924 EPI.NumExceptions = size(); 2925 EPI.Exceptions = data(); 2926 return EPI; 2927 } 2928 }; 2929 2930 /// \brief Determine what sort of exception specification a defaulted 2931 /// copy constructor of a class will have. 2932 ImplicitExceptionSpecification 2933 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2934 2935 /// \brief Determine what sort of exception specification a defaulted 2936 /// default constructor of a class will have, and whether the parameter 2937 /// will be const. 2938 std::pair<ImplicitExceptionSpecification, bool> 2939 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2940 2941 /// \brief Determine what sort of exception specification a defautled 2942 /// copy assignment operator of a class will have, and whether the 2943 /// parameter will be const. 2944 std::pair<ImplicitExceptionSpecification, bool> 2945 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2946 2947 /// \brief Determine what sort of exception specification a defaulted move 2948 /// constructor of a class will have. 2949 ImplicitExceptionSpecification 2950 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2951 2952 /// \brief Determine what sort of exception specification a defaulted move 2953 /// assignment operator of a class will have. 2954 ImplicitExceptionSpecification 2955 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2956 2957 /// \brief Determine what sort of exception specification a defaulted 2958 /// destructor of a class will have. 2959 ImplicitExceptionSpecification 2960 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2961 2962 /// \brief Determine if a special member function should have a deleted 2963 /// definition when it is defaulted. 2964 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2965 2966 /// \brief Determine if a defaulted copy assignment operator ought to be 2967 /// deleted. 2968 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2969 2970 /// \brief Determine if a defaulted move assignment operator ought to be 2971 /// deleted. 2972 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2973 2974 /// \brief Determine if a defaulted destructor ought to be deleted. 2975 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2976 2977 /// \brief Declare the implicit default constructor for the given class. 2978 /// 2979 /// \param ClassDecl The class declaration into which the implicit 2980 /// default constructor will be added. 2981 /// 2982 /// \returns The implicitly-declared default constructor. 2983 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2984 CXXRecordDecl *ClassDecl); 2985 2986 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2987 /// defining this constructor as the default constructor. 2988 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2989 CXXConstructorDecl *Constructor); 2990 2991 /// \brief Declare the implicit destructor for the given class. 2992 /// 2993 /// \param ClassDecl The class declaration into which the implicit 2994 /// destructor will be added. 2995 /// 2996 /// \returns The implicitly-declared destructor. 2997 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2998 2999 /// DefineImplicitDestructor - Checks for feasibility of 3000 /// defining this destructor as the default destructor. 3001 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3002 CXXDestructorDecl *Destructor); 3003 3004 /// \brief Build an exception spec for destructors that don't have one. 3005 /// 3006 /// C++11 says that user-defined destructors with no exception spec get one 3007 /// that looks as if the destructor was implicitly declared. 3008 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3009 CXXDestructorDecl *Destructor); 3010 3011 /// \brief Declare all inherited constructors for the given class. 3012 /// 3013 /// \param ClassDecl The class declaration into which the inherited 3014 /// constructors will be added. 3015 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3016 3017 /// \brief Declare the implicit copy constructor for the given class. 3018 /// 3019 /// \param ClassDecl The class declaration into which the implicit 3020 /// copy constructor will be added. 3021 /// 3022 /// \returns The implicitly-declared copy constructor. 3023 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3024 3025 /// DefineImplicitCopyConstructor - Checks for feasibility of 3026 /// defining this constructor as the copy constructor. 3027 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3028 CXXConstructorDecl *Constructor); 3029 3030 /// \brief Declare the implicit move constructor for the given class. 3031 /// 3032 /// \param ClassDecl The Class declaration into which the implicit 3033 /// move constructor will be added. 3034 /// 3035 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3036 /// declared. 3037 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3038 3039 /// DefineImplicitMoveConstructor - Checks for feasibility of 3040 /// defining this constructor as the move constructor. 3041 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3042 CXXConstructorDecl *Constructor); 3043 3044 /// \brief Declare the implicit copy assignment operator for the given class. 3045 /// 3046 /// \param ClassDecl The class declaration into which the implicit 3047 /// copy assignment operator will be added. 3048 /// 3049 /// \returns The implicitly-declared copy assignment operator. 3050 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3051 3052 /// \brief Defines an implicitly-declared copy assignment operator. 3053 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3054 CXXMethodDecl *MethodDecl); 3055 3056 /// \brief Declare the implicit move assignment operator for the given class. 3057 /// 3058 /// \param ClassDecl The Class declaration into which the implicit 3059 /// move assignment operator will be added. 3060 /// 3061 /// \returns The implicitly-declared move assignment operator, or NULL if it 3062 /// wasn't declared. 3063 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3064 3065 /// \brief Defines an implicitly-declared move assignment operator. 3066 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3067 CXXMethodDecl *MethodDecl); 3068 3069 /// \brief Force the declaration of any implicitly-declared members of this 3070 /// class. 3071 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3072 3073 /// MaybeBindToTemporary - If the passed in expression has a record type with 3074 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3075 /// it simply returns the passed in expression. 3076 ExprResult MaybeBindToTemporary(Expr *E); 3077 3078 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3079 MultiExprArg ArgsPtr, 3080 SourceLocation Loc, 3081 ASTOwningVector<Expr*> &ConvertedArgs); 3082 3083 ParsedType getDestructorName(SourceLocation TildeLoc, 3084 IdentifierInfo &II, SourceLocation NameLoc, 3085 Scope *S, CXXScopeSpec &SS, 3086 ParsedType ObjectType, 3087 bool EnteringContext); 3088 3089 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3090 3091 // Checks that reinterpret casts don't have undefined behavior. 3092 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3093 bool IsDereference, SourceRange Range); 3094 3095 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3096 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3097 tok::TokenKind Kind, 3098 SourceLocation LAngleBracketLoc, 3099 Declarator &D, 3100 SourceLocation RAngleBracketLoc, 3101 SourceLocation LParenLoc, 3102 Expr *E, 3103 SourceLocation RParenLoc); 3104 3105 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3106 tok::TokenKind Kind, 3107 TypeSourceInfo *Ty, 3108 Expr *E, 3109 SourceRange AngleBrackets, 3110 SourceRange Parens); 3111 3112 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3113 SourceLocation TypeidLoc, 3114 TypeSourceInfo *Operand, 3115 SourceLocation RParenLoc); 3116 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3117 SourceLocation TypeidLoc, 3118 Expr *Operand, 3119 SourceLocation RParenLoc); 3120 3121 /// ActOnCXXTypeid - Parse typeid( something ). 3122 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3123 SourceLocation LParenLoc, bool isType, 3124 void *TyOrExpr, 3125 SourceLocation RParenLoc); 3126 3127 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3128 SourceLocation TypeidLoc, 3129 TypeSourceInfo *Operand, 3130 SourceLocation RParenLoc); 3131 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3132 SourceLocation TypeidLoc, 3133 Expr *Operand, 3134 SourceLocation RParenLoc); 3135 3136 /// ActOnCXXUuidof - Parse __uuidof( something ). 3137 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3138 SourceLocation LParenLoc, bool isType, 3139 void *TyOrExpr, 3140 SourceLocation RParenLoc); 3141 3142 3143 //// ActOnCXXThis - Parse 'this' pointer. 3144 ExprResult ActOnCXXThis(SourceLocation loc); 3145 3146 /// \brief Try to retrieve the type of the 'this' pointer. 3147 /// 3148 /// \param Capture If true, capture 'this' in this context. 3149 /// 3150 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3151 QualType getCurrentThisType(); 3152 3153 /// \brief Make sure the value of 'this' is actually available in the current 3154 /// context, if it is a potentially evaluated context. This check can be 3155 /// delayed in PotentiallyPotentiallyEvaluated contexts. 3156 void CheckCXXThisCapture(SourceLocation Loc); 3157 3158 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3159 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3160 3161 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3162 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3163 3164 //// ActOnCXXThrow - Parse throw expressions. 3165 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3166 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3167 bool IsThrownVarInScope); 3168 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3169 bool IsThrownVarInScope); 3170 3171 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3172 /// Can be interpreted either as function-style casting ("int(x)") 3173 /// or class type construction ("ClassType(x,y,z)") 3174 /// or creation of a value-initialized type ("int()"). 3175 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3176 SourceLocation LParenLoc, 3177 MultiExprArg Exprs, 3178 SourceLocation RParenLoc); 3179 3180 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3181 SourceLocation LParenLoc, 3182 MultiExprArg Exprs, 3183 SourceLocation RParenLoc); 3184 3185 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3186 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3187 SourceLocation PlacementLParen, 3188 MultiExprArg PlacementArgs, 3189 SourceLocation PlacementRParen, 3190 SourceRange TypeIdParens, Declarator &D, 3191 SourceLocation ConstructorLParen, 3192 MultiExprArg ConstructorArgs, 3193 SourceLocation ConstructorRParen); 3194 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3195 SourceLocation PlacementLParen, 3196 MultiExprArg PlacementArgs, 3197 SourceLocation PlacementRParen, 3198 SourceRange TypeIdParens, 3199 QualType AllocType, 3200 TypeSourceInfo *AllocTypeInfo, 3201 Expr *ArraySize, 3202 SourceLocation ConstructorLParen, 3203 MultiExprArg ConstructorArgs, 3204 SourceLocation ConstructorRParen, 3205 bool TypeMayContainAuto = true); 3206 3207 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3208 SourceRange R); 3209 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3210 bool UseGlobal, QualType AllocType, bool IsArray, 3211 Expr **PlaceArgs, unsigned NumPlaceArgs, 3212 FunctionDecl *&OperatorNew, 3213 FunctionDecl *&OperatorDelete); 3214 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3215 DeclarationName Name, Expr** Args, 3216 unsigned NumArgs, DeclContext *Ctx, 3217 bool AllowMissing, FunctionDecl *&Operator, 3218 bool Diagnose = true); 3219 void DeclareGlobalNewDelete(); 3220 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3221 QualType Argument, 3222 bool addMallocAttr = false); 3223 3224 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3225 DeclarationName Name, FunctionDecl* &Operator, 3226 bool Diagnose = true); 3227 3228 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3229 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3230 bool UseGlobal, bool ArrayForm, 3231 Expr *Operand); 3232 3233 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3234 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3235 SourceLocation StmtLoc, 3236 bool ConvertToBoolean); 3237 3238 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3239 Expr *Operand, SourceLocation RParen); 3240 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3241 SourceLocation RParen); 3242 3243 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3244 /// pseudo-functions. 3245 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3246 SourceLocation KWLoc, 3247 ParsedType Ty, 3248 SourceLocation RParen); 3249 3250 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3251 SourceLocation KWLoc, 3252 TypeSourceInfo *T, 3253 SourceLocation RParen); 3254 3255 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3256 /// pseudo-functions. 3257 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3258 SourceLocation KWLoc, 3259 ParsedType LhsTy, 3260 ParsedType RhsTy, 3261 SourceLocation RParen); 3262 3263 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3264 SourceLocation KWLoc, 3265 TypeSourceInfo *LhsT, 3266 TypeSourceInfo *RhsT, 3267 SourceLocation RParen); 3268 3269 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3270 /// pseudo-functions. 3271 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3272 SourceLocation KWLoc, 3273 ParsedType LhsTy, 3274 Expr *DimExpr, 3275 SourceLocation RParen); 3276 3277 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3278 SourceLocation KWLoc, 3279 TypeSourceInfo *TSInfo, 3280 Expr *DimExpr, 3281 SourceLocation RParen); 3282 3283 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3284 /// pseudo-functions. 3285 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3286 SourceLocation KWLoc, 3287 Expr *Queried, 3288 SourceLocation RParen); 3289 3290 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3291 SourceLocation KWLoc, 3292 Expr *Queried, 3293 SourceLocation RParen); 3294 3295 ExprResult ActOnStartCXXMemberReference(Scope *S, 3296 Expr *Base, 3297 SourceLocation OpLoc, 3298 tok::TokenKind OpKind, 3299 ParsedType &ObjectType, 3300 bool &MayBePseudoDestructor); 3301 3302 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3303 3304 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3305 SourceLocation OpLoc, 3306 tok::TokenKind OpKind, 3307 const CXXScopeSpec &SS, 3308 TypeSourceInfo *ScopeType, 3309 SourceLocation CCLoc, 3310 SourceLocation TildeLoc, 3311 PseudoDestructorTypeStorage DestroyedType, 3312 bool HasTrailingLParen); 3313 3314 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3315 SourceLocation OpLoc, 3316 tok::TokenKind OpKind, 3317 CXXScopeSpec &SS, 3318 UnqualifiedId &FirstTypeName, 3319 SourceLocation CCLoc, 3320 SourceLocation TildeLoc, 3321 UnqualifiedId &SecondTypeName, 3322 bool HasTrailingLParen); 3323 3324 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3325 SourceLocation OpLoc, 3326 tok::TokenKind OpKind, 3327 SourceLocation TildeLoc, 3328 const DeclSpec& DS, 3329 bool HasTrailingLParen); 3330 3331 /// MaybeCreateExprWithCleanups - If the current full-expression 3332 /// requires any cleanups, surround it with a ExprWithCleanups node. 3333 /// Otherwise, just returns the passed-in expression. 3334 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3335 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3336 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3337 3338 ExprResult ActOnFinishFullExpr(Expr *Expr); 3339 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3340 3341 // Marks SS invalid if it represents an incomplete type. 3342 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3343 3344 DeclContext *computeDeclContext(QualType T); 3345 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3346 bool EnteringContext = false); 3347 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3348 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3349 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3350 3351 /// \brief The parser has parsed a global nested-name-specifier '::'. 3352 /// 3353 /// \param S The scope in which this nested-name-specifier occurs. 3354 /// 3355 /// \param CCLoc The location of the '::'. 3356 /// 3357 /// \param SS The nested-name-specifier, which will be updated in-place 3358 /// to reflect the parsed nested-name-specifier. 3359 /// 3360 /// \returns true if an error occurred, false otherwise. 3361 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3362 CXXScopeSpec &SS); 3363 3364 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3365 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3366 3367 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3368 SourceLocation IdLoc, 3369 IdentifierInfo &II, 3370 ParsedType ObjectType); 3371 3372 bool BuildCXXNestedNameSpecifier(Scope *S, 3373 IdentifierInfo &Identifier, 3374 SourceLocation IdentifierLoc, 3375 SourceLocation CCLoc, 3376 QualType ObjectType, 3377 bool EnteringContext, 3378 CXXScopeSpec &SS, 3379 NamedDecl *ScopeLookupResult, 3380 bool ErrorRecoveryLookup); 3381 3382 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3383 /// 3384 /// \param S The scope in which this nested-name-specifier occurs. 3385 /// 3386 /// \param Identifier The identifier preceding the '::'. 3387 /// 3388 /// \param IdentifierLoc The location of the identifier. 3389 /// 3390 /// \param CCLoc The location of the '::'. 3391 /// 3392 /// \param ObjectType The type of the object, if we're parsing 3393 /// nested-name-specifier in a member access expression. 3394 /// 3395 /// \param EnteringContext Whether we're entering the context nominated by 3396 /// this nested-name-specifier. 3397 /// 3398 /// \param SS The nested-name-specifier, which is both an input 3399 /// parameter (the nested-name-specifier before this type) and an 3400 /// output parameter (containing the full nested-name-specifier, 3401 /// including this new type). 3402 /// 3403 /// \returns true if an error occurred, false otherwise. 3404 bool ActOnCXXNestedNameSpecifier(Scope *S, 3405 IdentifierInfo &Identifier, 3406 SourceLocation IdentifierLoc, 3407 SourceLocation CCLoc, 3408 ParsedType ObjectType, 3409 bool EnteringContext, 3410 CXXScopeSpec &SS); 3411 3412 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3413 const DeclSpec &DS, 3414 SourceLocation ColonColonLoc); 3415 3416 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3417 IdentifierInfo &Identifier, 3418 SourceLocation IdentifierLoc, 3419 SourceLocation ColonLoc, 3420 ParsedType ObjectType, 3421 bool EnteringContext); 3422 3423 /// \brief The parser has parsed a nested-name-specifier 3424 /// 'template[opt] template-name < template-args >::'. 3425 /// 3426 /// \param S The scope in which this nested-name-specifier occurs. 3427 /// 3428 /// \param TemplateLoc The location of the 'template' keyword, if any. 3429 /// 3430 /// \param SS The nested-name-specifier, which is both an input 3431 /// parameter (the nested-name-specifier before this type) and an 3432 /// output parameter (containing the full nested-name-specifier, 3433 /// including this new type). 3434 /// 3435 /// \param TemplateLoc the location of the 'template' keyword, if any. 3436 /// \param TemplateName The template name. 3437 /// \param TemplateNameLoc The location of the template name. 3438 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3439 /// \param TemplateArgs The template arguments. 3440 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3441 /// \param CCLoc The location of the '::'. 3442 3443 /// \param EnteringContext Whether we're entering the context of the 3444 /// nested-name-specifier. 3445 /// 3446 /// 3447 /// \returns true if an error occurred, false otherwise. 3448 bool ActOnCXXNestedNameSpecifier(Scope *S, 3449 SourceLocation TemplateLoc, 3450 CXXScopeSpec &SS, 3451 TemplateTy Template, 3452 SourceLocation TemplateNameLoc, 3453 SourceLocation LAngleLoc, 3454 ASTTemplateArgsPtr TemplateArgs, 3455 SourceLocation RAngleLoc, 3456 SourceLocation CCLoc, 3457 bool EnteringContext); 3458 3459 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3460 /// that the parser can use later to reconstruct the given 3461 /// nested-name-specifier. 3462 /// 3463 /// \param SS A nested-name-specifier. 3464 /// 3465 /// \returns A pointer containing all of the information in the 3466 /// nested-name-specifier \p SS. 3467 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3468 3469 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3470 /// the nested-name-specifier structure. 3471 /// 3472 /// \param Annotation The annotation pointer, produced by 3473 /// \c SaveNestedNameSpecifierAnnotation(). 3474 /// 3475 /// \param AnnotationRange The source range corresponding to the annotation. 3476 /// 3477 /// \param SS The nested-name-specifier that will be updated with the contents 3478 /// of the annotation pointer. 3479 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3480 SourceRange AnnotationRange, 3481 CXXScopeSpec &SS); 3482 3483 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3484 3485 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3486 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3487 /// After this method is called, according to [C++ 3.4.3p3], names should be 3488 /// looked up in the declarator-id's scope, until the declarator is parsed and 3489 /// ActOnCXXExitDeclaratorScope is called. 3490 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3491 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3492 3493 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3494 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3495 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3496 /// Used to indicate that names should revert to being looked up in the 3497 /// defining scope. 3498 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3499 3500 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3501 /// initializer for the declaration 'Dcl'. 3502 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3503 /// static data member of class X, names should be looked up in the scope of 3504 /// class X. 3505 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3506 3507 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3508 /// initializer for the declaration 'Dcl'. 3509 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3510 3511 /// ActOnStartOfLambdaDefinition - This is called just before we start 3512 /// parsing the body of a lambda; it analyzes the explicit captures and 3513 /// arguments, and sets up various data-structures for the body of the 3514 /// lambda. 3515 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3516 Declarator &ParamInfo, Scope *CurScope); 3517 3518 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3519 /// is invoked to pop the information about the lambda. 3520 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope); 3521 3522 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3523 /// was successfully completed. 3524 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3525 Scope *CurScope); 3526 3527 // ParseObjCStringLiteral - Parse Objective-C string literals. 3528 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3529 Expr **Strings, 3530 unsigned NumStrings); 3531 3532 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3533 TypeSourceInfo *EncodedTypeInfo, 3534 SourceLocation RParenLoc); 3535 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3536 CXXMethodDecl *Method, 3537 bool HadMultipleCandidates); 3538 3539 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3540 SourceLocation EncodeLoc, 3541 SourceLocation LParenLoc, 3542 ParsedType Ty, 3543 SourceLocation RParenLoc); 3544 3545 // ParseObjCSelectorExpression - Build selector expression for @selector 3546 ExprResult ParseObjCSelectorExpression(Selector Sel, 3547 SourceLocation AtLoc, 3548 SourceLocation SelLoc, 3549 SourceLocation LParenLoc, 3550 SourceLocation RParenLoc); 3551 3552 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3553 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3554 SourceLocation AtLoc, 3555 SourceLocation ProtoLoc, 3556 SourceLocation LParenLoc, 3557 SourceLocation RParenLoc); 3558 3559 //===--------------------------------------------------------------------===// 3560 // C++ Declarations 3561 // 3562 Decl *ActOnStartLinkageSpecification(Scope *S, 3563 SourceLocation ExternLoc, 3564 SourceLocation LangLoc, 3565 StringRef Lang, 3566 SourceLocation LBraceLoc); 3567 Decl *ActOnFinishLinkageSpecification(Scope *S, 3568 Decl *LinkageSpec, 3569 SourceLocation RBraceLoc); 3570 3571 3572 //===--------------------------------------------------------------------===// 3573 // C++ Classes 3574 // 3575 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3576 const CXXScopeSpec *SS = 0); 3577 3578 bool ActOnAccessSpecifier(AccessSpecifier Access, 3579 SourceLocation ASLoc, 3580 SourceLocation ColonLoc, 3581 AttributeList *Attrs = 0); 3582 3583 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3584 Declarator &D, 3585 MultiTemplateParamsArg TemplateParameterLists, 3586 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3587 bool HasDeferredInit); 3588 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3589 Expr *Init); 3590 3591 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3592 Scope *S, 3593 CXXScopeSpec &SS, 3594 IdentifierInfo *MemberOrBase, 3595 ParsedType TemplateTypeTy, 3596 SourceLocation IdLoc, 3597 SourceLocation LParenLoc, 3598 Expr **Args, unsigned NumArgs, 3599 SourceLocation RParenLoc, 3600 SourceLocation EllipsisLoc); 3601 3602 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3603 Scope *S, 3604 CXXScopeSpec &SS, 3605 IdentifierInfo *MemberOrBase, 3606 ParsedType TemplateTypeTy, 3607 SourceLocation IdLoc, 3608 Expr *InitList, 3609 SourceLocation EllipsisLoc); 3610 3611 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3612 Scope *S, 3613 CXXScopeSpec &SS, 3614 IdentifierInfo *MemberOrBase, 3615 ParsedType TemplateTypeTy, 3616 SourceLocation IdLoc, 3617 const MultiInitializer &Init, 3618 SourceLocation EllipsisLoc); 3619 3620 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3621 const MultiInitializer &Args, 3622 SourceLocation IdLoc); 3623 3624 MemInitResult BuildBaseInitializer(QualType BaseType, 3625 TypeSourceInfo *BaseTInfo, 3626 const MultiInitializer &Args, 3627 CXXRecordDecl *ClassDecl, 3628 SourceLocation EllipsisLoc); 3629 3630 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3631 const MultiInitializer &Args, 3632 CXXRecordDecl *ClassDecl); 3633 3634 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3635 CXXCtorInitializer *Initializer); 3636 3637 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3638 CXXCtorInitializer **Initializers, 3639 unsigned NumInitializers, bool AnyErrors); 3640 3641 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3642 3643 3644 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3645 /// mark all the non-trivial destructors of its members and bases as 3646 /// referenced. 3647 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3648 CXXRecordDecl *Record); 3649 3650 /// \brief The list of classes whose vtables have been used within 3651 /// this translation unit, and the source locations at which the 3652 /// first use occurred. 3653 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3654 3655 /// \brief The list of vtables that are required but have not yet been 3656 /// materialized. 3657 SmallVector<VTableUse, 16> VTableUses; 3658 3659 /// \brief The set of classes whose vtables have been used within 3660 /// this translation unit, and a bit that will be true if the vtable is 3661 /// required to be emitted (otherwise, it should be emitted only if needed 3662 /// by code generation). 3663 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3664 3665 /// \brief Load any externally-stored vtable uses. 3666 void LoadExternalVTableUses(); 3667 3668 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3669 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3670 DynamicClassesType; 3671 3672 /// \brief A list of all of the dynamic classes in this translation 3673 /// unit. 3674 DynamicClassesType DynamicClasses; 3675 3676 /// \brief Note that the vtable for the given class was used at the 3677 /// given location. 3678 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3679 bool DefinitionRequired = false); 3680 3681 /// MarkVirtualMembersReferenced - Will mark all members of the given 3682 /// CXXRecordDecl referenced. 3683 void MarkVirtualMembersReferenced(SourceLocation Loc, 3684 const CXXRecordDecl *RD); 3685 3686 /// \brief Define all of the vtables that have been used in this 3687 /// translation unit and reference any virtual members used by those 3688 /// vtables. 3689 /// 3690 /// \returns true if any work was done, false otherwise. 3691 bool DefineUsedVTables(); 3692 3693 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3694 3695 void ActOnMemInitializers(Decl *ConstructorDecl, 3696 SourceLocation ColonLoc, 3697 CXXCtorInitializer **MemInits, 3698 unsigned NumMemInits, 3699 bool AnyErrors); 3700 3701 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3702 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3703 Decl *TagDecl, 3704 SourceLocation LBrac, 3705 SourceLocation RBrac, 3706 AttributeList *AttrList); 3707 3708 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3709 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3710 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3711 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3712 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3713 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3714 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3715 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3716 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3717 bool IsInsideALocalClassWithinATemplateFunction(); 3718 3719 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3720 Expr *AssertExpr, 3721 Expr *AssertMessageExpr, 3722 SourceLocation RParenLoc); 3723 3724 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3725 SourceLocation FriendLoc, 3726 TypeSourceInfo *TSInfo); 3727 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3728 MultiTemplateParamsArg TemplateParams); 3729 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3730 MultiTemplateParamsArg TemplateParams); 3731 3732 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3733 StorageClass& SC); 3734 void CheckConstructor(CXXConstructorDecl *Constructor); 3735 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3736 StorageClass& SC); 3737 bool CheckDestructor(CXXDestructorDecl *Destructor); 3738 void CheckConversionDeclarator(Declarator &D, QualType &R, 3739 StorageClass& SC); 3740 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3741 3742 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3743 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3744 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3745 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3746 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3747 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3748 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3749 3750 //===--------------------------------------------------------------------===// 3751 // C++ Derived Classes 3752 // 3753 3754 /// ActOnBaseSpecifier - Parsed a base specifier 3755 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3756 SourceRange SpecifierRange, 3757 bool Virtual, AccessSpecifier Access, 3758 TypeSourceInfo *TInfo, 3759 SourceLocation EllipsisLoc); 3760 3761 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3762 SourceRange SpecifierRange, 3763 bool Virtual, AccessSpecifier Access, 3764 ParsedType basetype, 3765 SourceLocation BaseLoc, 3766 SourceLocation EllipsisLoc); 3767 3768 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3769 unsigned NumBases); 3770 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3771 unsigned NumBases); 3772 3773 bool IsDerivedFrom(QualType Derived, QualType Base); 3774 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3775 3776 // FIXME: I don't like this name. 3777 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3778 3779 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3780 3781 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3782 SourceLocation Loc, SourceRange Range, 3783 CXXCastPath *BasePath = 0, 3784 bool IgnoreAccess = false); 3785 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3786 unsigned InaccessibleBaseID, 3787 unsigned AmbigiousBaseConvID, 3788 SourceLocation Loc, SourceRange Range, 3789 DeclarationName Name, 3790 CXXCastPath *BasePath); 3791 3792 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3793 3794 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3795 /// covariant, according to C++ [class.virtual]p5. 3796 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3797 const CXXMethodDecl *Old); 3798 3799 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3800 /// spec is a subset of base spec. 3801 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3802 const CXXMethodDecl *Old); 3803 3804 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3805 3806 /// CheckOverrideControl - Check C++0x override control semantics. 3807 void CheckOverrideControl(const Decl *D); 3808 3809 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3810 /// overrides a virtual member function marked 'final', according to 3811 /// C++0x [class.virtual]p3. 3812 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3813 const CXXMethodDecl *Old); 3814 3815 3816 //===--------------------------------------------------------------------===// 3817 // C++ Access Control 3818 // 3819 3820 enum AccessResult { 3821 AR_accessible, 3822 AR_inaccessible, 3823 AR_dependent, 3824 AR_delayed 3825 }; 3826 3827 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3828 NamedDecl *PrevMemberDecl, 3829 AccessSpecifier LexicalAS); 3830 3831 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3832 DeclAccessPair FoundDecl); 3833 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3834 DeclAccessPair FoundDecl); 3835 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3836 SourceRange PlacementRange, 3837 CXXRecordDecl *NamingClass, 3838 DeclAccessPair FoundDecl, 3839 bool Diagnose = true); 3840 AccessResult CheckConstructorAccess(SourceLocation Loc, 3841 CXXConstructorDecl *D, 3842 const InitializedEntity &Entity, 3843 AccessSpecifier Access, 3844 bool IsCopyBindingRefToTemp = false); 3845 AccessResult CheckConstructorAccess(SourceLocation Loc, 3846 CXXConstructorDecl *D, 3847 AccessSpecifier Access, 3848 PartialDiagnostic PD); 3849 AccessResult CheckDestructorAccess(SourceLocation Loc, 3850 CXXDestructorDecl *Dtor, 3851 const PartialDiagnostic &PDiag); 3852 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3853 NamedDecl *D, 3854 const PartialDiagnostic &PDiag); 3855 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3856 Expr *ObjectExpr, 3857 Expr *ArgExpr, 3858 DeclAccessPair FoundDecl); 3859 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3860 DeclAccessPair FoundDecl); 3861 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3862 QualType Base, QualType Derived, 3863 const CXXBasePath &Path, 3864 unsigned DiagID, 3865 bool ForceCheck = false, 3866 bool ForceUnprivileged = false); 3867 void CheckLookupAccess(const LookupResult &R); 3868 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3869 3870 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3871 const MultiLevelTemplateArgumentList &TemplateArgs); 3872 void PerformDependentDiagnostics(const DeclContext *Pattern, 3873 const MultiLevelTemplateArgumentList &TemplateArgs); 3874 3875 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3876 3877 /// A flag to suppress access checking. 3878 bool SuppressAccessChecking; 3879 3880 /// \brief When true, access checking violations are treated as SFINAE 3881 /// failures rather than hard errors. 3882 bool AccessCheckingSFINAE; 3883 3884 void ActOnStartSuppressingAccessChecks(); 3885 void ActOnStopSuppressingAccessChecks(); 3886 3887 enum AbstractDiagSelID { 3888 AbstractNone = -1, 3889 AbstractReturnType, 3890 AbstractParamType, 3891 AbstractVariableType, 3892 AbstractFieldType, 3893 AbstractArrayType 3894 }; 3895 3896 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3897 const PartialDiagnostic &PD); 3898 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3899 3900 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3901 AbstractDiagSelID SelID = AbstractNone); 3902 3903 //===--------------------------------------------------------------------===// 3904 // C++ Overloaded Operators [C++ 13.5] 3905 // 3906 3907 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3908 3909 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3910 3911 //===--------------------------------------------------------------------===// 3912 // C++ Templates [C++ 14] 3913 // 3914 void FilterAcceptableTemplateNames(LookupResult &R); 3915 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3916 3917 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3918 QualType ObjectType, bool EnteringContext, 3919 bool &MemberOfUnknownSpecialization); 3920 3921 TemplateNameKind isTemplateName(Scope *S, 3922 CXXScopeSpec &SS, 3923 bool hasTemplateKeyword, 3924 UnqualifiedId &Name, 3925 ParsedType ObjectType, 3926 bool EnteringContext, 3927 TemplateTy &Template, 3928 bool &MemberOfUnknownSpecialization); 3929 3930 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3931 SourceLocation IILoc, 3932 Scope *S, 3933 const CXXScopeSpec *SS, 3934 TemplateTy &SuggestedTemplate, 3935 TemplateNameKind &SuggestedKind); 3936 3937 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3938 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3939 3940 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3941 SourceLocation EllipsisLoc, 3942 SourceLocation KeyLoc, 3943 IdentifierInfo *ParamName, 3944 SourceLocation ParamNameLoc, 3945 unsigned Depth, unsigned Position, 3946 SourceLocation EqualLoc, 3947 ParsedType DefaultArg); 3948 3949 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3950 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3951 unsigned Depth, 3952 unsigned Position, 3953 SourceLocation EqualLoc, 3954 Expr *DefaultArg); 3955 Decl *ActOnTemplateTemplateParameter(Scope *S, 3956 SourceLocation TmpLoc, 3957 TemplateParameterList *Params, 3958 SourceLocation EllipsisLoc, 3959 IdentifierInfo *ParamName, 3960 SourceLocation ParamNameLoc, 3961 unsigned Depth, 3962 unsigned Position, 3963 SourceLocation EqualLoc, 3964 ParsedTemplateArgument DefaultArg); 3965 3966 TemplateParameterList * 3967 ActOnTemplateParameterList(unsigned Depth, 3968 SourceLocation ExportLoc, 3969 SourceLocation TemplateLoc, 3970 SourceLocation LAngleLoc, 3971 Decl **Params, unsigned NumParams, 3972 SourceLocation RAngleLoc); 3973 3974 /// \brief The context in which we are checking a template parameter 3975 /// list. 3976 enum TemplateParamListContext { 3977 TPC_ClassTemplate, 3978 TPC_FunctionTemplate, 3979 TPC_ClassTemplateMember, 3980 TPC_FriendFunctionTemplate, 3981 TPC_FriendFunctionTemplateDefinition, 3982 TPC_TypeAliasTemplate 3983 }; 3984 3985 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3986 TemplateParameterList *OldParams, 3987 TemplateParamListContext TPC); 3988 TemplateParameterList * 3989 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3990 SourceLocation DeclLoc, 3991 const CXXScopeSpec &SS, 3992 TemplateParameterList **ParamLists, 3993 unsigned NumParamLists, 3994 bool IsFriend, 3995 bool &IsExplicitSpecialization, 3996 bool &Invalid); 3997 3998 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3999 SourceLocation KWLoc, CXXScopeSpec &SS, 4000 IdentifierInfo *Name, SourceLocation NameLoc, 4001 AttributeList *Attr, 4002 TemplateParameterList *TemplateParams, 4003 AccessSpecifier AS, 4004 SourceLocation ModulePrivateLoc, 4005 unsigned NumOuterTemplateParamLists, 4006 TemplateParameterList **OuterTemplateParamLists); 4007 4008 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4009 TemplateArgumentListInfo &Out); 4010 4011 void NoteAllFoundTemplates(TemplateName Name); 4012 4013 QualType CheckTemplateIdType(TemplateName Template, 4014 SourceLocation TemplateLoc, 4015 TemplateArgumentListInfo &TemplateArgs); 4016 4017 TypeResult 4018 ActOnTemplateIdType(CXXScopeSpec &SS, 4019 TemplateTy Template, SourceLocation TemplateLoc, 4020 SourceLocation LAngleLoc, 4021 ASTTemplateArgsPtr TemplateArgs, 4022 SourceLocation RAngleLoc); 4023 4024 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4025 /// such as \c class T::template apply<U>. 4026 /// 4027 /// \param TUK 4028 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4029 TypeSpecifierType TagSpec, 4030 SourceLocation TagLoc, 4031 CXXScopeSpec &SS, 4032 TemplateTy TemplateD, 4033 SourceLocation TemplateLoc, 4034 SourceLocation LAngleLoc, 4035 ASTTemplateArgsPtr TemplateArgsIn, 4036 SourceLocation RAngleLoc); 4037 4038 4039 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4040 LookupResult &R, 4041 bool RequiresADL, 4042 const TemplateArgumentListInfo &TemplateArgs); 4043 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4044 const DeclarationNameInfo &NameInfo, 4045 const TemplateArgumentListInfo &TemplateArgs); 4046 4047 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4048 SourceLocation TemplateKWLoc, 4049 CXXScopeSpec &SS, 4050 UnqualifiedId &Name, 4051 ParsedType ObjectType, 4052 bool EnteringContext, 4053 TemplateTy &Template); 4054 4055 DeclResult 4056 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4057 SourceLocation KWLoc, 4058 SourceLocation ModulePrivateLoc, 4059 CXXScopeSpec &SS, 4060 TemplateTy Template, 4061 SourceLocation TemplateNameLoc, 4062 SourceLocation LAngleLoc, 4063 ASTTemplateArgsPtr TemplateArgs, 4064 SourceLocation RAngleLoc, 4065 AttributeList *Attr, 4066 MultiTemplateParamsArg TemplateParameterLists); 4067 4068 Decl *ActOnTemplateDeclarator(Scope *S, 4069 MultiTemplateParamsArg TemplateParameterLists, 4070 Declarator &D); 4071 4072 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4073 MultiTemplateParamsArg TemplateParameterLists, 4074 Declarator &D); 4075 4076 bool 4077 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4078 TemplateSpecializationKind NewTSK, 4079 NamedDecl *PrevDecl, 4080 TemplateSpecializationKind PrevTSK, 4081 SourceLocation PrevPtOfInstantiation, 4082 bool &SuppressNew); 4083 4084 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4085 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4086 LookupResult &Previous); 4087 4088 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4089 TemplateArgumentListInfo *ExplicitTemplateArgs, 4090 LookupResult &Previous); 4091 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4092 4093 DeclResult 4094 ActOnExplicitInstantiation(Scope *S, 4095 SourceLocation ExternLoc, 4096 SourceLocation TemplateLoc, 4097 unsigned TagSpec, 4098 SourceLocation KWLoc, 4099 const CXXScopeSpec &SS, 4100 TemplateTy Template, 4101 SourceLocation TemplateNameLoc, 4102 SourceLocation LAngleLoc, 4103 ASTTemplateArgsPtr TemplateArgs, 4104 SourceLocation RAngleLoc, 4105 AttributeList *Attr); 4106 4107 DeclResult 4108 ActOnExplicitInstantiation(Scope *S, 4109 SourceLocation ExternLoc, 4110 SourceLocation TemplateLoc, 4111 unsigned TagSpec, 4112 SourceLocation KWLoc, 4113 CXXScopeSpec &SS, 4114 IdentifierInfo *Name, 4115 SourceLocation NameLoc, 4116 AttributeList *Attr); 4117 4118 DeclResult ActOnExplicitInstantiation(Scope *S, 4119 SourceLocation ExternLoc, 4120 SourceLocation TemplateLoc, 4121 Declarator &D); 4122 4123 TemplateArgumentLoc 4124 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4125 SourceLocation TemplateLoc, 4126 SourceLocation RAngleLoc, 4127 Decl *Param, 4128 SmallVectorImpl<TemplateArgument> &Converted); 4129 4130 /// \brief Specifies the context in which a particular template 4131 /// argument is being checked. 4132 enum CheckTemplateArgumentKind { 4133 /// \brief The template argument was specified in the code or was 4134 /// instantiated with some deduced template arguments. 4135 CTAK_Specified, 4136 4137 /// \brief The template argument was deduced via template argument 4138 /// deduction. 4139 CTAK_Deduced, 4140 4141 /// \brief The template argument was deduced from an array bound 4142 /// via template argument deduction. 4143 CTAK_DeducedFromArrayBound 4144 }; 4145 4146 bool CheckTemplateArgument(NamedDecl *Param, 4147 const TemplateArgumentLoc &Arg, 4148 NamedDecl *Template, 4149 SourceLocation TemplateLoc, 4150 SourceLocation RAngleLoc, 4151 unsigned ArgumentPackIndex, 4152 SmallVectorImpl<TemplateArgument> &Converted, 4153 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4154 4155 /// \brief Check that the given template arguments can be be provided to 4156 /// the given template, converting the arguments along the way. 4157 /// 4158 /// \param Template The template to which the template arguments are being 4159 /// provided. 4160 /// 4161 /// \param TemplateLoc The location of the template name in the source. 4162 /// 4163 /// \param TemplateArgs The list of template arguments. If the template is 4164 /// a template template parameter, this function may extend the set of 4165 /// template arguments to also include substituted, defaulted template 4166 /// arguments. 4167 /// 4168 /// \param PartialTemplateArgs True if the list of template arguments is 4169 /// intentionally partial, e.g., because we're checking just the initial 4170 /// set of template arguments. 4171 /// 4172 /// \param Converted Will receive the converted, canonicalized template 4173 /// arguments. 4174 /// 4175 /// \returns True if an error occurred, false otherwise. 4176 bool CheckTemplateArgumentList(TemplateDecl *Template, 4177 SourceLocation TemplateLoc, 4178 TemplateArgumentListInfo &TemplateArgs, 4179 bool PartialTemplateArgs, 4180 SmallVectorImpl<TemplateArgument> &Converted); 4181 4182 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4183 const TemplateArgumentLoc &Arg, 4184 SmallVectorImpl<TemplateArgument> &Converted); 4185 4186 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4187 TypeSourceInfo *Arg); 4188 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4189 TemplateArgument &Converted); 4190 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4191 QualType InstantiatedParamType, Expr *Arg, 4192 TemplateArgument &Converted, 4193 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4194 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4195 const TemplateArgumentLoc &Arg); 4196 4197 ExprResult 4198 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4199 QualType ParamType, 4200 SourceLocation Loc); 4201 ExprResult 4202 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4203 SourceLocation Loc); 4204 4205 /// \brief Enumeration describing how template parameter lists are compared 4206 /// for equality. 4207 enum TemplateParameterListEqualKind { 4208 /// \brief We are matching the template parameter lists of two templates 4209 /// that might be redeclarations. 4210 /// 4211 /// \code 4212 /// template<typename T> struct X; 4213 /// template<typename T> struct X; 4214 /// \endcode 4215 TPL_TemplateMatch, 4216 4217 /// \brief We are matching the template parameter lists of two template 4218 /// template parameters as part of matching the template parameter lists 4219 /// of two templates that might be redeclarations. 4220 /// 4221 /// \code 4222 /// template<template<int I> class TT> struct X; 4223 /// template<template<int Value> class Other> struct X; 4224 /// \endcode 4225 TPL_TemplateTemplateParmMatch, 4226 4227 /// \brief We are matching the template parameter lists of a template 4228 /// template argument against the template parameter lists of a template 4229 /// template parameter. 4230 /// 4231 /// \code 4232 /// template<template<int Value> class Metafun> struct X; 4233 /// template<int Value> struct integer_c; 4234 /// X<integer_c> xic; 4235 /// \endcode 4236 TPL_TemplateTemplateArgumentMatch 4237 }; 4238 4239 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4240 TemplateParameterList *Old, 4241 bool Complain, 4242 TemplateParameterListEqualKind Kind, 4243 SourceLocation TemplateArgLoc 4244 = SourceLocation()); 4245 4246 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4247 4248 /// \brief Called when the parser has parsed a C++ typename 4249 /// specifier, e.g., "typename T::type". 4250 /// 4251 /// \param S The scope in which this typename type occurs. 4252 /// \param TypenameLoc the location of the 'typename' keyword 4253 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4254 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4255 /// \param IdLoc the location of the identifier. 4256 TypeResult 4257 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4258 const CXXScopeSpec &SS, const IdentifierInfo &II, 4259 SourceLocation IdLoc); 4260 4261 /// \brief Called when the parser has parsed a C++ typename 4262 /// specifier that ends in a template-id, e.g., 4263 /// "typename MetaFun::template apply<T1, T2>". 4264 /// 4265 /// \param S The scope in which this typename type occurs. 4266 /// \param TypenameLoc the location of the 'typename' keyword 4267 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4268 /// \param TemplateLoc the location of the 'template' keyword, if any. 4269 /// \param TemplateName The template name. 4270 /// \param TemplateNameLoc The location of the template name. 4271 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4272 /// \param TemplateArgs The template arguments. 4273 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4274 TypeResult 4275 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4276 const CXXScopeSpec &SS, 4277 SourceLocation TemplateLoc, 4278 TemplateTy Template, 4279 SourceLocation TemplateNameLoc, 4280 SourceLocation LAngleLoc, 4281 ASTTemplateArgsPtr TemplateArgs, 4282 SourceLocation RAngleLoc); 4283 4284 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4285 SourceLocation KeywordLoc, 4286 NestedNameSpecifierLoc QualifierLoc, 4287 const IdentifierInfo &II, 4288 SourceLocation IILoc); 4289 4290 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4291 SourceLocation Loc, 4292 DeclarationName Name); 4293 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4294 4295 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4296 bool RebuildTemplateParamsInCurrentInstantiation( 4297 TemplateParameterList *Params); 4298 4299 std::string 4300 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4301 const TemplateArgumentList &Args); 4302 4303 std::string 4304 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4305 const TemplateArgument *Args, 4306 unsigned NumArgs); 4307 4308 //===--------------------------------------------------------------------===// 4309 // C++ Variadic Templates (C++0x [temp.variadic]) 4310 //===--------------------------------------------------------------------===// 4311 4312 /// \brief The context in which an unexpanded parameter pack is 4313 /// being diagnosed. 4314 /// 4315 /// Note that the values of this enumeration line up with the first 4316 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4317 enum UnexpandedParameterPackContext { 4318 /// \brief An arbitrary expression. 4319 UPPC_Expression = 0, 4320 4321 /// \brief The base type of a class type. 4322 UPPC_BaseType, 4323 4324 /// \brief The type of an arbitrary declaration. 4325 UPPC_DeclarationType, 4326 4327 /// \brief The type of a data member. 4328 UPPC_DataMemberType, 4329 4330 /// \brief The size of a bit-field. 4331 UPPC_BitFieldWidth, 4332 4333 /// \brief The expression in a static assertion. 4334 UPPC_StaticAssertExpression, 4335 4336 /// \brief The fixed underlying type of an enumeration. 4337 UPPC_FixedUnderlyingType, 4338 4339 /// \brief The enumerator value. 4340 UPPC_EnumeratorValue, 4341 4342 /// \brief A using declaration. 4343 UPPC_UsingDeclaration, 4344 4345 /// \brief A friend declaration. 4346 UPPC_FriendDeclaration, 4347 4348 /// \brief A declaration qualifier. 4349 UPPC_DeclarationQualifier, 4350 4351 /// \brief An initializer. 4352 UPPC_Initializer, 4353 4354 /// \brief A default argument. 4355 UPPC_DefaultArgument, 4356 4357 /// \brief The type of a non-type template parameter. 4358 UPPC_NonTypeTemplateParameterType, 4359 4360 /// \brief The type of an exception. 4361 UPPC_ExceptionType, 4362 4363 /// \brief Partial specialization. 4364 UPPC_PartialSpecialization, 4365 4366 /// \brief Microsoft __if_exists. 4367 UPPC_IfExists, 4368 4369 /// \brief Microsoft __if_not_exists. 4370 UPPC_IfNotExists 4371}; 4372 4373 /// \brief Diagnose unexpanded parameter packs. 4374 /// 4375 /// \param Loc The location at which we should emit the diagnostic. 4376 /// 4377 /// \param UPPC The context in which we are diagnosing unexpanded 4378 /// parameter packs. 4379 /// 4380 /// \param Unexpanded the set of unexpanded parameter packs. 4381 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4382 UnexpandedParameterPackContext UPPC, 4383 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4384 4385 /// \brief If the given type contains an unexpanded parameter pack, 4386 /// diagnose the error. 4387 /// 4388 /// \param Loc The source location where a diagnostc should be emitted. 4389 /// 4390 /// \param T The type that is being checked for unexpanded parameter 4391 /// packs. 4392 /// 4393 /// \returns true if an error occurred, false otherwise. 4394 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4395 UnexpandedParameterPackContext UPPC); 4396 4397 /// \brief If the given expression contains an unexpanded parameter 4398 /// pack, diagnose the error. 4399 /// 4400 /// \param E The expression that is being checked for unexpanded 4401 /// parameter packs. 4402 /// 4403 /// \returns true if an error occurred, false otherwise. 4404 bool DiagnoseUnexpandedParameterPack(Expr *E, 4405 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4406 4407 /// \brief If the given nested-name-specifier contains an unexpanded 4408 /// parameter pack, diagnose the error. 4409 /// 4410 /// \param SS The nested-name-specifier that is being checked for 4411 /// unexpanded parameter packs. 4412 /// 4413 /// \returns true if an error occurred, false otherwise. 4414 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4415 UnexpandedParameterPackContext UPPC); 4416 4417 /// \brief If the given name contains an unexpanded parameter pack, 4418 /// diagnose the error. 4419 /// 4420 /// \param NameInfo The name (with source location information) that 4421 /// is being checked for unexpanded parameter packs. 4422 /// 4423 /// \returns true if an error occurred, false otherwise. 4424 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4425 UnexpandedParameterPackContext UPPC); 4426 4427 /// \brief If the given template name contains an unexpanded parameter pack, 4428 /// diagnose the error. 4429 /// 4430 /// \param Loc The location of the template name. 4431 /// 4432 /// \param Template The template name that is being checked for unexpanded 4433 /// parameter packs. 4434 /// 4435 /// \returns true if an error occurred, false otherwise. 4436 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4437 TemplateName Template, 4438 UnexpandedParameterPackContext UPPC); 4439 4440 /// \brief If the given template argument contains an unexpanded parameter 4441 /// pack, diagnose the error. 4442 /// 4443 /// \param Arg The template argument that is being checked for unexpanded 4444 /// parameter packs. 4445 /// 4446 /// \returns true if an error occurred, false otherwise. 4447 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4448 UnexpandedParameterPackContext UPPC); 4449 4450 /// \brief Collect the set of unexpanded parameter packs within the given 4451 /// template argument. 4452 /// 4453 /// \param Arg The template argument that will be traversed to find 4454 /// unexpanded parameter packs. 4455 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4456 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4457 4458 /// \brief Collect the set of unexpanded parameter packs within the given 4459 /// template argument. 4460 /// 4461 /// \param Arg The template argument that will be traversed to find 4462 /// unexpanded parameter packs. 4463 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4464 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4465 4466 /// \brief Collect the set of unexpanded parameter packs within the given 4467 /// type. 4468 /// 4469 /// \param T The type that will be traversed to find 4470 /// unexpanded parameter packs. 4471 void collectUnexpandedParameterPacks(QualType T, 4472 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4473 4474 /// \brief Collect the set of unexpanded parameter packs within the given 4475 /// type. 4476 /// 4477 /// \param TL The type that will be traversed to find 4478 /// unexpanded parameter packs. 4479 void collectUnexpandedParameterPacks(TypeLoc TL, 4480 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4481 4482 /// \brief Collect the set of unexpanded parameter packs within the given 4483 /// nested-name-specifier. 4484 /// 4485 /// \param SS The nested-name-specifier that will be traversed to find 4486 /// unexpanded parameter packs. 4487 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4488 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4489 4490 /// \brief Collect the set of unexpanded parameter packs within the given 4491 /// name. 4492 /// 4493 /// \param NameInfo The name that will be traversed to find 4494 /// unexpanded parameter packs. 4495 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4496 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4497 4498 /// \brief Invoked when parsing a template argument followed by an 4499 /// ellipsis, which creates a pack expansion. 4500 /// 4501 /// \param Arg The template argument preceding the ellipsis, which 4502 /// may already be invalid. 4503 /// 4504 /// \param EllipsisLoc The location of the ellipsis. 4505 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4506 SourceLocation EllipsisLoc); 4507 4508 /// \brief Invoked when parsing a type followed by an ellipsis, which 4509 /// creates a pack expansion. 4510 /// 4511 /// \param Type The type preceding the ellipsis, which will become 4512 /// the pattern of the pack expansion. 4513 /// 4514 /// \param EllipsisLoc The location of the ellipsis. 4515 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4516 4517 /// \brief Construct a pack expansion type from the pattern of the pack 4518 /// expansion. 4519 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4520 SourceLocation EllipsisLoc, 4521 llvm::Optional<unsigned> NumExpansions); 4522 4523 /// \brief Construct a pack expansion type from the pattern of the pack 4524 /// expansion. 4525 QualType CheckPackExpansion(QualType Pattern, 4526 SourceRange PatternRange, 4527 SourceLocation EllipsisLoc, 4528 llvm::Optional<unsigned> NumExpansions); 4529 4530 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4531 /// creates a pack expansion. 4532 /// 4533 /// \param Pattern The expression preceding the ellipsis, which will become 4534 /// the pattern of the pack expansion. 4535 /// 4536 /// \param EllipsisLoc The location of the ellipsis. 4537 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4538 4539 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4540 /// creates a pack expansion. 4541 /// 4542 /// \param Pattern The expression preceding the ellipsis, which will become 4543 /// the pattern of the pack expansion. 4544 /// 4545 /// \param EllipsisLoc The location of the ellipsis. 4546 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4547 llvm::Optional<unsigned> NumExpansions); 4548 4549 /// \brief Determine whether we could expand a pack expansion with the 4550 /// given set of parameter packs into separate arguments by repeatedly 4551 /// transforming the pattern. 4552 /// 4553 /// \param EllipsisLoc The location of the ellipsis that identifies the 4554 /// pack expansion. 4555 /// 4556 /// \param PatternRange The source range that covers the entire pattern of 4557 /// the pack expansion. 4558 /// 4559 /// \param Unexpanded The set of unexpanded parameter packs within the 4560 /// pattern. 4561 /// 4562 /// \param NumUnexpanded The number of unexpanded parameter packs in 4563 /// \p Unexpanded. 4564 /// 4565 /// \param ShouldExpand Will be set to \c true if the transformer should 4566 /// expand the corresponding pack expansions into separate arguments. When 4567 /// set, \c NumExpansions must also be set. 4568 /// 4569 /// \param RetainExpansion Whether the caller should add an unexpanded 4570 /// pack expansion after all of the expanded arguments. This is used 4571 /// when extending explicitly-specified template argument packs per 4572 /// C++0x [temp.arg.explicit]p9. 4573 /// 4574 /// \param NumExpansions The number of separate arguments that will be in 4575 /// the expanded form of the corresponding pack expansion. This is both an 4576 /// input and an output parameter, which can be set by the caller if the 4577 /// number of expansions is known a priori (e.g., due to a prior substitution) 4578 /// and will be set by the callee when the number of expansions is known. 4579 /// The callee must set this value when \c ShouldExpand is \c true; it may 4580 /// set this value in other cases. 4581 /// 4582 /// \returns true if an error occurred (e.g., because the parameter packs 4583 /// are to be instantiated with arguments of different lengths), false 4584 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4585 /// must be set. 4586 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4587 SourceRange PatternRange, 4588 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4589 const MultiLevelTemplateArgumentList &TemplateArgs, 4590 bool &ShouldExpand, 4591 bool &RetainExpansion, 4592 llvm::Optional<unsigned> &NumExpansions); 4593 4594 /// \brief Determine the number of arguments in the given pack expansion 4595 /// type. 4596 /// 4597 /// This routine already assumes that the pack expansion type can be 4598 /// expanded and that the number of arguments in the expansion is 4599 /// consistent across all of the unexpanded parameter packs in its pattern. 4600 unsigned getNumArgumentsInExpansion(QualType T, 4601 const MultiLevelTemplateArgumentList &TemplateArgs); 4602 4603 /// \brief Determine whether the given declarator contains any unexpanded 4604 /// parameter packs. 4605 /// 4606 /// This routine is used by the parser to disambiguate function declarators 4607 /// with an ellipsis prior to the ')', e.g., 4608 /// 4609 /// \code 4610 /// void f(T...); 4611 /// \endcode 4612 /// 4613 /// To determine whether we have an (unnamed) function parameter pack or 4614 /// a variadic function. 4615 /// 4616 /// \returns true if the declarator contains any unexpanded parameter packs, 4617 /// false otherwise. 4618 bool containsUnexpandedParameterPacks(Declarator &D); 4619 4620 //===--------------------------------------------------------------------===// 4621 // C++ Template Argument Deduction (C++ [temp.deduct]) 4622 //===--------------------------------------------------------------------===// 4623 4624 /// \brief Describes the result of template argument deduction. 4625 /// 4626 /// The TemplateDeductionResult enumeration describes the result of 4627 /// template argument deduction, as returned from 4628 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4629 /// structure provides additional information about the results of 4630 /// template argument deduction, e.g., the deduced template argument 4631 /// list (if successful) or the specific template parameters or 4632 /// deduced arguments that were involved in the failure. 4633 enum TemplateDeductionResult { 4634 /// \brief Template argument deduction was successful. 4635 TDK_Success = 0, 4636 /// \brief Template argument deduction exceeded the maximum template 4637 /// instantiation depth (which has already been diagnosed). 4638 TDK_InstantiationDepth, 4639 /// \brief Template argument deduction did not deduce a value 4640 /// for every template parameter. 4641 TDK_Incomplete, 4642 /// \brief Template argument deduction produced inconsistent 4643 /// deduced values for the given template parameter. 4644 TDK_Inconsistent, 4645 /// \brief Template argument deduction failed due to inconsistent 4646 /// cv-qualifiers on a template parameter type that would 4647 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4648 /// but were given a non-const "X". 4649 TDK_Underqualified, 4650 /// \brief Substitution of the deduced template argument values 4651 /// resulted in an error. 4652 TDK_SubstitutionFailure, 4653 /// \brief Substitution of the deduced template argument values 4654 /// into a non-deduced context produced a type or value that 4655 /// produces a type that does not match the original template 4656 /// arguments provided. 4657 TDK_NonDeducedMismatch, 4658 /// \brief When performing template argument deduction for a function 4659 /// template, there were too many call arguments. 4660 TDK_TooManyArguments, 4661 /// \brief When performing template argument deduction for a function 4662 /// template, there were too few call arguments. 4663 TDK_TooFewArguments, 4664 /// \brief The explicitly-specified template arguments were not valid 4665 /// template arguments for the given template. 4666 TDK_InvalidExplicitArguments, 4667 /// \brief The arguments included an overloaded function name that could 4668 /// not be resolved to a suitable function. 4669 TDK_FailedOverloadResolution 4670 }; 4671 4672 TemplateDeductionResult 4673 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4674 const TemplateArgumentList &TemplateArgs, 4675 sema::TemplateDeductionInfo &Info); 4676 4677 TemplateDeductionResult 4678 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4679 TemplateArgumentListInfo &ExplicitTemplateArgs, 4680 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4681 SmallVectorImpl<QualType> &ParamTypes, 4682 QualType *FunctionType, 4683 sema::TemplateDeductionInfo &Info); 4684 4685 /// brief A function argument from which we performed template argument 4686 // deduction for a call. 4687 struct OriginalCallArg { 4688 OriginalCallArg(QualType OriginalParamType, 4689 unsigned ArgIdx, 4690 QualType OriginalArgType) 4691 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4692 OriginalArgType(OriginalArgType) { } 4693 4694 QualType OriginalParamType; 4695 unsigned ArgIdx; 4696 QualType OriginalArgType; 4697 }; 4698 4699 TemplateDeductionResult 4700 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4701 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4702 unsigned NumExplicitlySpecified, 4703 FunctionDecl *&Specialization, 4704 sema::TemplateDeductionInfo &Info, 4705 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4706 4707 TemplateDeductionResult 4708 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4709 TemplateArgumentListInfo *ExplicitTemplateArgs, 4710 Expr **Args, unsigned NumArgs, 4711 FunctionDecl *&Specialization, 4712 sema::TemplateDeductionInfo &Info); 4713 4714 TemplateDeductionResult 4715 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4716 TemplateArgumentListInfo *ExplicitTemplateArgs, 4717 QualType ArgFunctionType, 4718 FunctionDecl *&Specialization, 4719 sema::TemplateDeductionInfo &Info); 4720 4721 TemplateDeductionResult 4722 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4723 QualType ToType, 4724 CXXConversionDecl *&Specialization, 4725 sema::TemplateDeductionInfo &Info); 4726 4727 TemplateDeductionResult 4728 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4729 TemplateArgumentListInfo *ExplicitTemplateArgs, 4730 FunctionDecl *&Specialization, 4731 sema::TemplateDeductionInfo &Info); 4732 4733 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4734 TypeSourceInfo *&Result); 4735 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4736 4737 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4738 FunctionTemplateDecl *FT2, 4739 SourceLocation Loc, 4740 TemplatePartialOrderingContext TPOC, 4741 unsigned NumCallArguments); 4742 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4743 UnresolvedSetIterator SEnd, 4744 TemplatePartialOrderingContext TPOC, 4745 unsigned NumCallArguments, 4746 SourceLocation Loc, 4747 const PartialDiagnostic &NoneDiag, 4748 const PartialDiagnostic &AmbigDiag, 4749 const PartialDiagnostic &CandidateDiag, 4750 bool Complain = true, 4751 QualType TargetType = QualType()); 4752 4753 ClassTemplatePartialSpecializationDecl * 4754 getMoreSpecializedPartialSpecialization( 4755 ClassTemplatePartialSpecializationDecl *PS1, 4756 ClassTemplatePartialSpecializationDecl *PS2, 4757 SourceLocation Loc); 4758 4759 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4760 bool OnlyDeduced, 4761 unsigned Depth, 4762 SmallVectorImpl<bool> &Used); 4763 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4764 SmallVectorImpl<bool> &Deduced) { 4765 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4766 } 4767 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4768 FunctionTemplateDecl *FunctionTemplate, 4769 SmallVectorImpl<bool> &Deduced); 4770 4771 //===--------------------------------------------------------------------===// 4772 // C++ Template Instantiation 4773 // 4774 4775 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4776 const TemplateArgumentList *Innermost = 0, 4777 bool RelativeToPrimary = false, 4778 const FunctionDecl *Pattern = 0); 4779 4780 /// \brief A template instantiation that is currently in progress. 4781 struct ActiveTemplateInstantiation { 4782 /// \brief The kind of template instantiation we are performing 4783 enum InstantiationKind { 4784 /// We are instantiating a template declaration. The entity is 4785 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4786 TemplateInstantiation, 4787 4788 /// We are instantiating a default argument for a template 4789 /// parameter. The Entity is the template, and 4790 /// TemplateArgs/NumTemplateArguments provides the template 4791 /// arguments as specified. 4792 /// FIXME: Use a TemplateArgumentList 4793 DefaultTemplateArgumentInstantiation, 4794 4795 /// We are instantiating a default argument for a function. 4796 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4797 /// provides the template arguments as specified. 4798 DefaultFunctionArgumentInstantiation, 4799 4800 /// We are substituting explicit template arguments provided for 4801 /// a function template. The entity is a FunctionTemplateDecl. 4802 ExplicitTemplateArgumentSubstitution, 4803 4804 /// We are substituting template argument determined as part of 4805 /// template argument deduction for either a class template 4806 /// partial specialization or a function template. The 4807 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4808 /// a FunctionTemplateDecl. 4809 DeducedTemplateArgumentSubstitution, 4810 4811 /// We are substituting prior template arguments into a new 4812 /// template parameter. The template parameter itself is either a 4813 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4814 PriorTemplateArgumentSubstitution, 4815 4816 /// We are checking the validity of a default template argument that 4817 /// has been used when naming a template-id. 4818 DefaultTemplateArgumentChecking 4819 } Kind; 4820 4821 /// \brief The point of instantiation within the source code. 4822 SourceLocation PointOfInstantiation; 4823 4824 /// \brief The template (or partial specialization) in which we are 4825 /// performing the instantiation, for substitutions of prior template 4826 /// arguments. 4827 NamedDecl *Template; 4828 4829 /// \brief The entity that is being instantiated. 4830 uintptr_t Entity; 4831 4832 /// \brief The list of template arguments we are substituting, if they 4833 /// are not part of the entity. 4834 const TemplateArgument *TemplateArgs; 4835 4836 /// \brief The number of template arguments in TemplateArgs. 4837 unsigned NumTemplateArgs; 4838 4839 /// \brief The template deduction info object associated with the 4840 /// substitution or checking of explicit or deduced template arguments. 4841 sema::TemplateDeductionInfo *DeductionInfo; 4842 4843 /// \brief The source range that covers the construct that cause 4844 /// the instantiation, e.g., the template-id that causes a class 4845 /// template instantiation. 4846 SourceRange InstantiationRange; 4847 4848 ActiveTemplateInstantiation() 4849 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4850 NumTemplateArgs(0), DeductionInfo(0) {} 4851 4852 /// \brief Determines whether this template is an actual instantiation 4853 /// that should be counted toward the maximum instantiation depth. 4854 bool isInstantiationRecord() const; 4855 4856 friend bool operator==(const ActiveTemplateInstantiation &X, 4857 const ActiveTemplateInstantiation &Y) { 4858 if (X.Kind != Y.Kind) 4859 return false; 4860 4861 if (X.Entity != Y.Entity) 4862 return false; 4863 4864 switch (X.Kind) { 4865 case TemplateInstantiation: 4866 return true; 4867 4868 case PriorTemplateArgumentSubstitution: 4869 case DefaultTemplateArgumentChecking: 4870 if (X.Template != Y.Template) 4871 return false; 4872 4873 // Fall through 4874 4875 case DefaultTemplateArgumentInstantiation: 4876 case ExplicitTemplateArgumentSubstitution: 4877 case DeducedTemplateArgumentSubstitution: 4878 case DefaultFunctionArgumentInstantiation: 4879 return X.TemplateArgs == Y.TemplateArgs; 4880 4881 } 4882 4883 llvm_unreachable("Invalid InstantiationKind!"); 4884 } 4885 4886 friend bool operator!=(const ActiveTemplateInstantiation &X, 4887 const ActiveTemplateInstantiation &Y) { 4888 return !(X == Y); 4889 } 4890 }; 4891 4892 /// \brief List of active template instantiations. 4893 /// 4894 /// This vector is treated as a stack. As one template instantiation 4895 /// requires another template instantiation, additional 4896 /// instantiations are pushed onto the stack up to a 4897 /// user-configurable limit LangOptions::InstantiationDepth. 4898 SmallVector<ActiveTemplateInstantiation, 16> 4899 ActiveTemplateInstantiations; 4900 4901 /// \brief Whether we are in a SFINAE context that is not associated with 4902 /// template instantiation. 4903 /// 4904 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4905 /// of a template instantiation or template argument deduction. 4906 bool InNonInstantiationSFINAEContext; 4907 4908 /// \brief The number of ActiveTemplateInstantiation entries in 4909 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4910 /// therefore, should not be counted as part of the instantiation depth. 4911 unsigned NonInstantiationEntries; 4912 4913 /// \brief The last template from which a template instantiation 4914 /// error or warning was produced. 4915 /// 4916 /// This value is used to suppress printing of redundant template 4917 /// instantiation backtraces when there are multiple errors in the 4918 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4919 /// to implement it anywhere else. 4920 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4921 4922 /// \brief The current index into pack expansion arguments that will be 4923 /// used for substitution of parameter packs. 4924 /// 4925 /// The pack expansion index will be -1 to indicate that parameter packs 4926 /// should be instantiated as themselves. Otherwise, the index specifies 4927 /// which argument within the parameter pack will be used for substitution. 4928 int ArgumentPackSubstitutionIndex; 4929 4930 /// \brief RAII object used to change the argument pack substitution index 4931 /// within a \c Sema object. 4932 /// 4933 /// See \c ArgumentPackSubstitutionIndex for more information. 4934 class ArgumentPackSubstitutionIndexRAII { 4935 Sema &Self; 4936 int OldSubstitutionIndex; 4937 4938 public: 4939 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4940 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4941 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4942 } 4943 4944 ~ArgumentPackSubstitutionIndexRAII() { 4945 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4946 } 4947 }; 4948 4949 friend class ArgumentPackSubstitutionRAII; 4950 4951 /// \brief The stack of calls expression undergoing template instantiation. 4952 /// 4953 /// The top of this stack is used by a fixit instantiating unresolved 4954 /// function calls to fix the AST to match the textual change it prints. 4955 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4956 4957 /// \brief For each declaration that involved template argument deduction, the 4958 /// set of diagnostics that were suppressed during that template argument 4959 /// deduction. 4960 /// 4961 /// FIXME: Serialize this structure to the AST file. 4962 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4963 SuppressedDiagnostics; 4964 4965 /// \brief A stack object to be created when performing template 4966 /// instantiation. 4967 /// 4968 /// Construction of an object of type \c InstantiatingTemplate 4969 /// pushes the current instantiation onto the stack of active 4970 /// instantiations. If the size of this stack exceeds the maximum 4971 /// number of recursive template instantiations, construction 4972 /// produces an error and evaluates true. 4973 /// 4974 /// Destruction of this object will pop the named instantiation off 4975 /// the stack. 4976 struct InstantiatingTemplate { 4977 /// \brief Note that we are instantiating a class template, 4978 /// function template, or a member thereof. 4979 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4980 Decl *Entity, 4981 SourceRange InstantiationRange = SourceRange()); 4982 4983 /// \brief Note that we are instantiating a default argument in a 4984 /// template-id. 4985 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4986 TemplateDecl *Template, 4987 const TemplateArgument *TemplateArgs, 4988 unsigned NumTemplateArgs, 4989 SourceRange InstantiationRange = SourceRange()); 4990 4991 /// \brief Note that we are instantiating a default argument in a 4992 /// template-id. 4993 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4994 FunctionTemplateDecl *FunctionTemplate, 4995 const TemplateArgument *TemplateArgs, 4996 unsigned NumTemplateArgs, 4997 ActiveTemplateInstantiation::InstantiationKind Kind, 4998 sema::TemplateDeductionInfo &DeductionInfo, 4999 SourceRange InstantiationRange = SourceRange()); 5000 5001 /// \brief Note that we are instantiating as part of template 5002 /// argument deduction for a class template partial 5003 /// specialization. 5004 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5005 ClassTemplatePartialSpecializationDecl *PartialSpec, 5006 const TemplateArgument *TemplateArgs, 5007 unsigned NumTemplateArgs, 5008 sema::TemplateDeductionInfo &DeductionInfo, 5009 SourceRange InstantiationRange = SourceRange()); 5010 5011 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5012 ParmVarDecl *Param, 5013 const TemplateArgument *TemplateArgs, 5014 unsigned NumTemplateArgs, 5015 SourceRange InstantiationRange = SourceRange()); 5016 5017 /// \brief Note that we are substituting prior template arguments into a 5018 /// non-type or template template parameter. 5019 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5020 NamedDecl *Template, 5021 NonTypeTemplateParmDecl *Param, 5022 const TemplateArgument *TemplateArgs, 5023 unsigned NumTemplateArgs, 5024 SourceRange InstantiationRange); 5025 5026 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5027 NamedDecl *Template, 5028 TemplateTemplateParmDecl *Param, 5029 const TemplateArgument *TemplateArgs, 5030 unsigned NumTemplateArgs, 5031 SourceRange InstantiationRange); 5032 5033 /// \brief Note that we are checking the default template argument 5034 /// against the template parameter for a given template-id. 5035 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5036 TemplateDecl *Template, 5037 NamedDecl *Param, 5038 const TemplateArgument *TemplateArgs, 5039 unsigned NumTemplateArgs, 5040 SourceRange InstantiationRange); 5041 5042 5043 /// \brief Note that we have finished instantiating this template. 5044 void Clear(); 5045 5046 ~InstantiatingTemplate() { Clear(); } 5047 5048 /// \brief Determines whether we have exceeded the maximum 5049 /// recursive template instantiations. 5050 operator bool() const { return Invalid; } 5051 5052 private: 5053 Sema &SemaRef; 5054 bool Invalid; 5055 bool SavedInNonInstantiationSFINAEContext; 5056 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5057 SourceRange InstantiationRange); 5058 5059 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5060 5061 InstantiatingTemplate& 5062 operator=(const InstantiatingTemplate&); // not implemented 5063 }; 5064 5065 void PrintInstantiationStack(); 5066 5067 /// \brief Determines whether we are currently in a context where 5068 /// template argument substitution failures are not considered 5069 /// errors. 5070 /// 5071 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5072 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5073 /// template-deduction context object, which can be used to capture 5074 /// diagnostics that will be suppressed. 5075 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5076 5077 /// \brief RAII class used to determine whether SFINAE has 5078 /// trapped any errors that occur during template argument 5079 /// deduction.` 5080 class SFINAETrap { 5081 Sema &SemaRef; 5082 unsigned PrevSFINAEErrors; 5083 bool PrevInNonInstantiationSFINAEContext; 5084 bool PrevAccessCheckingSFINAE; 5085 5086 public: 5087 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5088 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5089 PrevInNonInstantiationSFINAEContext( 5090 SemaRef.InNonInstantiationSFINAEContext), 5091 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5092 { 5093 if (!SemaRef.isSFINAEContext()) 5094 SemaRef.InNonInstantiationSFINAEContext = true; 5095 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5096 } 5097 5098 ~SFINAETrap() { 5099 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5100 SemaRef.InNonInstantiationSFINAEContext 5101 = PrevInNonInstantiationSFINAEContext; 5102 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5103 } 5104 5105 /// \brief Determine whether any SFINAE errors have been trapped. 5106 bool hasErrorOccurred() const { 5107 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5108 } 5109 }; 5110 5111 /// \brief The current instantiation scope used to store local 5112 /// variables. 5113 LocalInstantiationScope *CurrentInstantiationScope; 5114 5115 /// \brief The number of typos corrected by CorrectTypo. 5116 unsigned TyposCorrected; 5117 5118 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5119 UnqualifiedTyposCorrectedMap; 5120 5121 /// \brief A cache containing the results of typo correction for unqualified 5122 /// name lookup. 5123 /// 5124 /// The string is the string that we corrected to (which may be empty, if 5125 /// there was no correction), while the boolean will be true when the 5126 /// string represents a keyword. 5127 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5128 5129 /// \brief Worker object for performing CFG-based warnings. 5130 sema::AnalysisBasedWarnings AnalysisWarnings; 5131 5132 /// \brief An entity for which implicit template instantiation is required. 5133 /// 5134 /// The source location associated with the declaration is the first place in 5135 /// the source code where the declaration was "used". It is not necessarily 5136 /// the point of instantiation (which will be either before or after the 5137 /// namespace-scope declaration that triggered this implicit instantiation), 5138 /// However, it is the location that diagnostics should generally refer to, 5139 /// because users will need to know what code triggered the instantiation. 5140 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5141 5142 /// \brief The queue of implicit template instantiations that are required 5143 /// but have not yet been performed. 5144 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5145 5146 /// \brief The queue of implicit template instantiations that are required 5147 /// and must be performed within the current local scope. 5148 /// 5149 /// This queue is only used for member functions of local classes in 5150 /// templates, which must be instantiated in the same scope as their 5151 /// enclosing function, so that they can reference function-local 5152 /// types, static variables, enumerators, etc. 5153 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5154 5155 void PerformPendingInstantiations(bool LocalOnly = false); 5156 5157 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5158 const MultiLevelTemplateArgumentList &TemplateArgs, 5159 SourceLocation Loc, DeclarationName Entity); 5160 5161 QualType SubstType(QualType T, 5162 const MultiLevelTemplateArgumentList &TemplateArgs, 5163 SourceLocation Loc, DeclarationName Entity); 5164 5165 TypeSourceInfo *SubstType(TypeLoc TL, 5166 const MultiLevelTemplateArgumentList &TemplateArgs, 5167 SourceLocation Loc, DeclarationName Entity); 5168 5169 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5170 const MultiLevelTemplateArgumentList &TemplateArgs, 5171 SourceLocation Loc, 5172 DeclarationName Entity); 5173 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5174 const MultiLevelTemplateArgumentList &TemplateArgs, 5175 int indexAdjustment, 5176 llvm::Optional<unsigned> NumExpansions); 5177 bool SubstParmTypes(SourceLocation Loc, 5178 ParmVarDecl **Params, unsigned NumParams, 5179 const MultiLevelTemplateArgumentList &TemplateArgs, 5180 SmallVectorImpl<QualType> &ParamTypes, 5181 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5182 ExprResult SubstExpr(Expr *E, 5183 const MultiLevelTemplateArgumentList &TemplateArgs); 5184 5185 /// \brief Substitute the given template arguments into a list of 5186 /// expressions, expanding pack expansions if required. 5187 /// 5188 /// \param Exprs The list of expressions to substitute into. 5189 /// 5190 /// \param NumExprs The number of expressions in \p Exprs. 5191 /// 5192 /// \param IsCall Whether this is some form of call, in which case 5193 /// default arguments will be dropped. 5194 /// 5195 /// \param TemplateArgs The set of template arguments to substitute. 5196 /// 5197 /// \param Outputs Will receive all of the substituted arguments. 5198 /// 5199 /// \returns true if an error occurred, false otherwise. 5200 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5201 const MultiLevelTemplateArgumentList &TemplateArgs, 5202 SmallVectorImpl<Expr *> &Outputs); 5203 5204 StmtResult SubstStmt(Stmt *S, 5205 const MultiLevelTemplateArgumentList &TemplateArgs); 5206 5207 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5208 const MultiLevelTemplateArgumentList &TemplateArgs); 5209 5210 bool 5211 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5212 CXXRecordDecl *Pattern, 5213 const MultiLevelTemplateArgumentList &TemplateArgs); 5214 5215 bool 5216 InstantiateClass(SourceLocation PointOfInstantiation, 5217 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5218 const MultiLevelTemplateArgumentList &TemplateArgs, 5219 TemplateSpecializationKind TSK, 5220 bool Complain = true); 5221 5222 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5223 const Decl *Pattern, Decl *Inst); 5224 5225 bool 5226 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5227 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5228 TemplateSpecializationKind TSK, 5229 bool Complain = true); 5230 5231 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5232 CXXRecordDecl *Instantiation, 5233 const MultiLevelTemplateArgumentList &TemplateArgs, 5234 TemplateSpecializationKind TSK); 5235 5236 void InstantiateClassTemplateSpecializationMembers( 5237 SourceLocation PointOfInstantiation, 5238 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5239 TemplateSpecializationKind TSK); 5240 5241 NestedNameSpecifierLoc 5242 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5243 const MultiLevelTemplateArgumentList &TemplateArgs); 5244 5245 DeclarationNameInfo 5246 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5247 const MultiLevelTemplateArgumentList &TemplateArgs); 5248 TemplateName 5249 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5250 SourceLocation Loc, 5251 const MultiLevelTemplateArgumentList &TemplateArgs); 5252 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5253 TemplateArgumentListInfo &Result, 5254 const MultiLevelTemplateArgumentList &TemplateArgs); 5255 5256 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5257 FunctionDecl *Function, 5258 bool Recursive = false, 5259 bool DefinitionRequired = false); 5260 void InstantiateStaticDataMemberDefinition( 5261 SourceLocation PointOfInstantiation, 5262 VarDecl *Var, 5263 bool Recursive = false, 5264 bool DefinitionRequired = false); 5265 5266 void InstantiateMemInitializers(CXXConstructorDecl *New, 5267 const CXXConstructorDecl *Tmpl, 5268 const MultiLevelTemplateArgumentList &TemplateArgs); 5269 bool InstantiateInitializer(Expr *Init, 5270 const MultiLevelTemplateArgumentList &TemplateArgs, 5271 SourceLocation &LParenLoc, 5272 ASTOwningVector<Expr*> &NewArgs, 5273 SourceLocation &RParenLoc); 5274 5275 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5276 const MultiLevelTemplateArgumentList &TemplateArgs); 5277 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5278 const MultiLevelTemplateArgumentList &TemplateArgs); 5279 5280 // Objective-C declarations. 5281 enum ObjCContainerKind { 5282 OCK_None = -1, 5283 OCK_Interface = 0, 5284 OCK_Protocol, 5285 OCK_Category, 5286 OCK_ClassExtension, 5287 OCK_Implementation, 5288 OCK_CategoryImplementation 5289 }; 5290 ObjCContainerKind getObjCContainerKind() const; 5291 5292 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5293 IdentifierInfo *ClassName, 5294 SourceLocation ClassLoc, 5295 IdentifierInfo *SuperName, 5296 SourceLocation SuperLoc, 5297 Decl * const *ProtoRefs, 5298 unsigned NumProtoRefs, 5299 const SourceLocation *ProtoLocs, 5300 SourceLocation EndProtoLoc, 5301 AttributeList *AttrList); 5302 5303 Decl *ActOnCompatiblityAlias( 5304 SourceLocation AtCompatibilityAliasLoc, 5305 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5306 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5307 5308 bool CheckForwardProtocolDeclarationForCircularDependency( 5309 IdentifierInfo *PName, 5310 SourceLocation &PLoc, SourceLocation PrevLoc, 5311 const ObjCList<ObjCProtocolDecl> &PList); 5312 5313 Decl *ActOnStartProtocolInterface( 5314 SourceLocation AtProtoInterfaceLoc, 5315 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5316 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5317 const SourceLocation *ProtoLocs, 5318 SourceLocation EndProtoLoc, 5319 AttributeList *AttrList); 5320 5321 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5322 IdentifierInfo *ClassName, 5323 SourceLocation ClassLoc, 5324 IdentifierInfo *CategoryName, 5325 SourceLocation CategoryLoc, 5326 Decl * const *ProtoRefs, 5327 unsigned NumProtoRefs, 5328 const SourceLocation *ProtoLocs, 5329 SourceLocation EndProtoLoc); 5330 5331 Decl *ActOnStartClassImplementation( 5332 SourceLocation AtClassImplLoc, 5333 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5334 IdentifierInfo *SuperClassname, 5335 SourceLocation SuperClassLoc); 5336 5337 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5338 IdentifierInfo *ClassName, 5339 SourceLocation ClassLoc, 5340 IdentifierInfo *CatName, 5341 SourceLocation CatLoc); 5342 5343 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5344 IdentifierInfo **IdentList, 5345 SourceLocation *IdentLocs, 5346 unsigned NumElts); 5347 5348 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5349 const IdentifierLocPair *IdentList, 5350 unsigned NumElts, 5351 AttributeList *attrList); 5352 5353 void FindProtocolDeclaration(bool WarnOnDeclarations, 5354 const IdentifierLocPair *ProtocolId, 5355 unsigned NumProtocols, 5356 SmallVectorImpl<Decl *> &Protocols); 5357 5358 /// Ensure attributes are consistent with type. 5359 /// \param [in, out] Attributes The attributes to check; they will 5360 /// be modified to be consistent with \arg PropertyTy. 5361 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5362 SourceLocation Loc, 5363 unsigned &Attributes); 5364 5365 /// Process the specified property declaration and create decls for the 5366 /// setters and getters as needed. 5367 /// \param property The property declaration being processed 5368 /// \param DC The semantic container for the property 5369 /// \param redeclaredProperty Declaration for property if redeclared 5370 /// in class extension. 5371 /// \param lexicalDC Container for redeclaredProperty. 5372 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5373 ObjCContainerDecl *DC, 5374 ObjCPropertyDecl *redeclaredProperty = 0, 5375 ObjCContainerDecl *lexicalDC = 0); 5376 5377 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5378 ObjCPropertyDecl *SuperProperty, 5379 const IdentifierInfo *Name); 5380 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5381 5382 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5383 ObjCMethodDecl *MethodDecl, 5384 bool IsInstance); 5385 5386 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5387 5388 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5389 ObjCInterfaceDecl *ID); 5390 5391 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5392 ObjCProtocolDecl *PDecl); 5393 5394 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5395 Decl **allMethods = 0, unsigned allNum = 0, 5396 Decl **allProperties = 0, unsigned pNum = 0, 5397 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5398 5399 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5400 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5401 Selector GetterSel, Selector SetterSel, 5402 bool *OverridingProperty, 5403 tok::ObjCKeywordKind MethodImplKind, 5404 DeclContext *lexicalDC = 0); 5405 5406 Decl *ActOnPropertyImplDecl(Scope *S, 5407 SourceLocation AtLoc, 5408 SourceLocation PropertyLoc, 5409 bool ImplKind, 5410 IdentifierInfo *PropertyId, 5411 IdentifierInfo *PropertyIvar, 5412 SourceLocation PropertyIvarLoc); 5413 5414 enum ObjCSpecialMethodKind { 5415 OSMK_None, 5416 OSMK_Alloc, 5417 OSMK_New, 5418 OSMK_Copy, 5419 OSMK_RetainingInit, 5420 OSMK_NonRetainingInit 5421 }; 5422 5423 struct ObjCArgInfo { 5424 IdentifierInfo *Name; 5425 SourceLocation NameLoc; 5426 // The Type is null if no type was specified, and the DeclSpec is invalid 5427 // in this case. 5428 ParsedType Type; 5429 ObjCDeclSpec DeclSpec; 5430 5431 /// ArgAttrs - Attribute list for this argument. 5432 AttributeList *ArgAttrs; 5433 }; 5434 5435 Decl *ActOnMethodDeclaration( 5436 Scope *S, 5437 SourceLocation BeginLoc, // location of the + or -. 5438 SourceLocation EndLoc, // location of the ; or {. 5439 tok::TokenKind MethodType, 5440 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5441 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5442 // optional arguments. The number of types/arguments is obtained 5443 // from the Sel.getNumArgs(). 5444 ObjCArgInfo *ArgInfo, 5445 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5446 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5447 bool isVariadic, bool MethodDefinition); 5448 5449 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5450 // Will search "local" class/category implementations for a method decl. 5451 // Will also search in class's root looking for instance method. 5452 // Returns 0 if no method is found. 5453 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5454 ObjCInterfaceDecl *CDecl); 5455 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5456 ObjCInterfaceDecl *ClassDecl); 5457 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5458 const ObjCObjectPointerType *OPT, 5459 bool IsInstance); 5460 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5461 bool IsInstance); 5462 5463 bool inferObjCARCLifetime(ValueDecl *decl); 5464 5465 ExprResult 5466 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5467 Expr *BaseExpr, 5468 SourceLocation OpLoc, 5469 DeclarationName MemberName, 5470 SourceLocation MemberLoc, 5471 SourceLocation SuperLoc, QualType SuperType, 5472 bool Super); 5473 5474 ExprResult 5475 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5476 IdentifierInfo &propertyName, 5477 SourceLocation receiverNameLoc, 5478 SourceLocation propertyNameLoc); 5479 5480 ObjCMethodDecl *tryCaptureObjCSelf(); 5481 5482 /// \brief Describes the kind of message expression indicated by a message 5483 /// send that starts with an identifier. 5484 enum ObjCMessageKind { 5485 /// \brief The message is sent to 'super'. 5486 ObjCSuperMessage, 5487 /// \brief The message is an instance message. 5488 ObjCInstanceMessage, 5489 /// \brief The message is a class message, and the identifier is a type 5490 /// name. 5491 ObjCClassMessage 5492 }; 5493 5494 ObjCMessageKind getObjCMessageKind(Scope *S, 5495 IdentifierInfo *Name, 5496 SourceLocation NameLoc, 5497 bool IsSuper, 5498 bool HasTrailingDot, 5499 ParsedType &ReceiverType); 5500 5501 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5502 Selector Sel, 5503 SourceLocation LBracLoc, 5504 ArrayRef<SourceLocation> SelectorLocs, 5505 SourceLocation RBracLoc, 5506 MultiExprArg Args); 5507 5508 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5509 QualType ReceiverType, 5510 SourceLocation SuperLoc, 5511 Selector Sel, 5512 ObjCMethodDecl *Method, 5513 SourceLocation LBracLoc, 5514 ArrayRef<SourceLocation> SelectorLocs, 5515 SourceLocation RBracLoc, 5516 MultiExprArg Args, 5517 bool isImplicit = false); 5518 5519 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5520 bool isSuperReceiver, 5521 SourceLocation Loc, 5522 Selector Sel, 5523 ObjCMethodDecl *Method, 5524 MultiExprArg Args); 5525 5526 ExprResult ActOnClassMessage(Scope *S, 5527 ParsedType Receiver, 5528 Selector Sel, 5529 SourceLocation LBracLoc, 5530 ArrayRef<SourceLocation> SelectorLocs, 5531 SourceLocation RBracLoc, 5532 MultiExprArg Args); 5533 5534 ExprResult BuildInstanceMessage(Expr *Receiver, 5535 QualType ReceiverType, 5536 SourceLocation SuperLoc, 5537 Selector Sel, 5538 ObjCMethodDecl *Method, 5539 SourceLocation LBracLoc, 5540 ArrayRef<SourceLocation> SelectorLocs, 5541 SourceLocation RBracLoc, 5542 MultiExprArg Args, 5543 bool isImplicit = false); 5544 5545 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5546 QualType ReceiverType, 5547 SourceLocation Loc, 5548 Selector Sel, 5549 ObjCMethodDecl *Method, 5550 MultiExprArg Args); 5551 5552 ExprResult ActOnInstanceMessage(Scope *S, 5553 Expr *Receiver, 5554 Selector Sel, 5555 SourceLocation LBracLoc, 5556 ArrayRef<SourceLocation> SelectorLocs, 5557 SourceLocation RBracLoc, 5558 MultiExprArg Args); 5559 5560 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5561 ObjCBridgeCastKind Kind, 5562 SourceLocation BridgeKeywordLoc, 5563 TypeSourceInfo *TSInfo, 5564 Expr *SubExpr); 5565 5566 ExprResult ActOnObjCBridgedCast(Scope *S, 5567 SourceLocation LParenLoc, 5568 ObjCBridgeCastKind Kind, 5569 SourceLocation BridgeKeywordLoc, 5570 ParsedType Type, 5571 SourceLocation RParenLoc, 5572 Expr *SubExpr); 5573 5574 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5575 5576 /// \brief Check whether the given new method is a valid override of the 5577 /// given overridden method, and set any properties that should be inherited. 5578 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5579 const ObjCMethodDecl *Overridden, 5580 bool IsImplementation); 5581 5582 /// \brief Check whether the given method overrides any methods in its class, 5583 /// calling \c CheckObjCMethodOverride for each overridden method. 5584 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5585 5586 enum PragmaOptionsAlignKind { 5587 POAK_Native, // #pragma options align=native 5588 POAK_Natural, // #pragma options align=natural 5589 POAK_Packed, // #pragma options align=packed 5590 POAK_Power, // #pragma options align=power 5591 POAK_Mac68k, // #pragma options align=mac68k 5592 POAK_Reset // #pragma options align=reset 5593 }; 5594 5595 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5596 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5597 SourceLocation PragmaLoc, 5598 SourceLocation KindLoc); 5599 5600 enum PragmaPackKind { 5601 PPK_Default, // #pragma pack([n]) 5602 PPK_Show, // #pragma pack(show), only supported by MSVC. 5603 PPK_Push, // #pragma pack(push, [identifier], [n]) 5604 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5605 }; 5606 5607 enum PragmaMSStructKind { 5608 PMSST_OFF, // #pragms ms_struct off 5609 PMSST_ON // #pragms ms_struct on 5610 }; 5611 5612 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5613 void ActOnPragmaPack(PragmaPackKind Kind, 5614 IdentifierInfo *Name, 5615 Expr *Alignment, 5616 SourceLocation PragmaLoc, 5617 SourceLocation LParenLoc, 5618 SourceLocation RParenLoc); 5619 5620 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5621 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5622 5623 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5624 void ActOnPragmaUnused(const Token &Identifier, 5625 Scope *curScope, 5626 SourceLocation PragmaLoc); 5627 5628 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5629 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5630 SourceLocation PragmaLoc); 5631 5632 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5633 SourceLocation Loc); 5634 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5635 5636 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5637 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5638 SourceLocation PragmaLoc, 5639 SourceLocation WeakNameLoc); 5640 5641 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5642 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5643 IdentifierInfo* AliasName, 5644 SourceLocation PragmaLoc, 5645 SourceLocation WeakNameLoc, 5646 SourceLocation AliasNameLoc); 5647 5648 /// ActOnPragmaFPContract - Called on well formed 5649 /// #pragma {STDC,OPENCL} FP_CONTRACT 5650 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5651 5652 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5653 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5654 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5655 5656 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5657 void AddMsStructLayoutForRecord(RecordDecl *RD); 5658 5659 /// FreePackedContext - Deallocate and null out PackContext. 5660 void FreePackedContext(); 5661 5662 /// PushNamespaceVisibilityAttr - Note that we've entered a 5663 /// namespace with a visibility attribute. 5664 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5665 5666 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5667 /// add an appropriate visibility attribute. 5668 void AddPushedVisibilityAttribute(Decl *RD); 5669 5670 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5671 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5672 void PopPragmaVisibility(); 5673 5674 /// FreeVisContext - Deallocate and null out VisContext. 5675 void FreeVisContext(); 5676 5677 /// AddCFAuditedAttribute - Check whether we're currently within 5678 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5679 /// the appropriate attribute. 5680 void AddCFAuditedAttribute(Decl *D); 5681 5682 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5683 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5684 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5685 5686 /// \brief The kind of conversion being performed. 5687 enum CheckedConversionKind { 5688 /// \brief An implicit conversion. 5689 CCK_ImplicitConversion, 5690 /// \brief A C-style cast. 5691 CCK_CStyleCast, 5692 /// \brief A functional-style cast. 5693 CCK_FunctionalCast, 5694 /// \brief A cast other than a C-style cast. 5695 CCK_OtherCast 5696 }; 5697 5698 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5699 /// cast. If there is already an implicit cast, merge into the existing one. 5700 /// If isLvalue, the result of the cast is an lvalue. 5701 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5702 ExprValueKind VK = VK_RValue, 5703 const CXXCastPath *BasePath = 0, 5704 CheckedConversionKind CCK 5705 = CCK_ImplicitConversion); 5706 5707 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5708 /// to the conversion from scalar type ScalarTy to the Boolean type. 5709 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5710 5711 /// IgnoredValueConversions - Given that an expression's result is 5712 /// syntactically ignored, perform any conversions that are 5713 /// required. 5714 ExprResult IgnoredValueConversions(Expr *E); 5715 5716 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5717 // functions and arrays to their respective pointers (C99 6.3.2.1). 5718 ExprResult UsualUnaryConversions(Expr *E); 5719 5720 // DefaultFunctionArrayConversion - converts functions and arrays 5721 // to their respective pointers (C99 6.3.2.1). 5722 ExprResult DefaultFunctionArrayConversion(Expr *E); 5723 5724 // DefaultFunctionArrayLvalueConversion - converts functions and 5725 // arrays to their respective pointers and performs the 5726 // lvalue-to-rvalue conversion. 5727 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5728 5729 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5730 // the operand. This is DefaultFunctionArrayLvalueConversion, 5731 // except that it assumes the operand isn't of function or array 5732 // type. 5733 ExprResult DefaultLvalueConversion(Expr *E); 5734 5735 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5736 // do not have a prototype. Integer promotions are performed on each 5737 // argument, and arguments that have type float are promoted to double. 5738 ExprResult DefaultArgumentPromotion(Expr *E); 5739 5740 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5741 enum VariadicCallType { 5742 VariadicFunction, 5743 VariadicBlock, 5744 VariadicMethod, 5745 VariadicConstructor, 5746 VariadicDoesNotApply 5747 }; 5748 5749 /// GatherArgumentsForCall - Collector argument expressions for various 5750 /// form of call prototypes. 5751 bool GatherArgumentsForCall(SourceLocation CallLoc, 5752 FunctionDecl *FDecl, 5753 const FunctionProtoType *Proto, 5754 unsigned FirstProtoArg, 5755 Expr **Args, unsigned NumArgs, 5756 SmallVector<Expr *, 8> &AllArgs, 5757 VariadicCallType CallType = VariadicDoesNotApply); 5758 5759 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5760 // will warn if the resulting type is not a POD type. 5761 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5762 FunctionDecl *FDecl); 5763 5764 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5765 // operands and then handles various conversions that are common to binary 5766 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5767 // routine returns the first non-arithmetic type found. The client is 5768 // responsible for emitting appropriate error diagnostics. 5769 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5770 bool IsCompAssign = false); 5771 5772 /// AssignConvertType - All of the 'assignment' semantic checks return this 5773 /// enum to indicate whether the assignment was allowed. These checks are 5774 /// done for simple assignments, as well as initialization, return from 5775 /// function, argument passing, etc. The query is phrased in terms of a 5776 /// source and destination type. 5777 enum AssignConvertType { 5778 /// Compatible - the types are compatible according to the standard. 5779 Compatible, 5780 5781 /// PointerToInt - The assignment converts a pointer to an int, which we 5782 /// accept as an extension. 5783 PointerToInt, 5784 5785 /// IntToPointer - The assignment converts an int to a pointer, which we 5786 /// accept as an extension. 5787 IntToPointer, 5788 5789 /// FunctionVoidPointer - The assignment is between a function pointer and 5790 /// void*, which the standard doesn't allow, but we accept as an extension. 5791 FunctionVoidPointer, 5792 5793 /// IncompatiblePointer - The assignment is between two pointers types that 5794 /// are not compatible, but we accept them as an extension. 5795 IncompatiblePointer, 5796 5797 /// IncompatiblePointer - The assignment is between two pointers types which 5798 /// point to integers which have a different sign, but are otherwise 5799 /// identical. This is a subset of the above, but broken out because it's by 5800 /// far the most common case of incompatible pointers. 5801 IncompatiblePointerSign, 5802 5803 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5804 /// c/v/r qualifiers, which we accept as an extension. 5805 CompatiblePointerDiscardsQualifiers, 5806 5807 /// IncompatiblePointerDiscardsQualifiers - The assignment 5808 /// discards qualifiers that we don't permit to be discarded, 5809 /// like address spaces. 5810 IncompatiblePointerDiscardsQualifiers, 5811 5812 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5813 /// nested pointer types, and the qualifiers other than the first two 5814 /// levels differ e.g. char ** -> const char **, but we accept them as an 5815 /// extension. 5816 IncompatibleNestedPointerQualifiers, 5817 5818 /// IncompatibleVectors - The assignment is between two vector types that 5819 /// have the same size, which we accept as an extension. 5820 IncompatibleVectors, 5821 5822 /// IntToBlockPointer - The assignment converts an int to a block 5823 /// pointer. We disallow this. 5824 IntToBlockPointer, 5825 5826 /// IncompatibleBlockPointer - The assignment is between two block 5827 /// pointers types that are not compatible. 5828 IncompatibleBlockPointer, 5829 5830 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5831 /// id type and something else (that is incompatible with it). For example, 5832 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5833 IncompatibleObjCQualifiedId, 5834 5835 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5836 /// object with __weak qualifier. 5837 IncompatibleObjCWeakRef, 5838 5839 /// Incompatible - We reject this conversion outright, it is invalid to 5840 /// represent it in the AST. 5841 Incompatible 5842 }; 5843 5844 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5845 /// assignment conversion type specified by ConvTy. This returns true if the 5846 /// conversion was invalid or false if the conversion was accepted. 5847 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5848 SourceLocation Loc, 5849 QualType DstType, QualType SrcType, 5850 Expr *SrcExpr, AssignmentAction Action, 5851 bool *Complained = 0); 5852 5853 /// CheckAssignmentConstraints - Perform type checking for assignment, 5854 /// argument passing, variable initialization, and function return values. 5855 /// C99 6.5.16. 5856 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5857 QualType LHSType, 5858 QualType RHSType); 5859 5860 /// Check assignment constraints and prepare for a conversion of the 5861 /// RHS to the LHS type. 5862 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5863 ExprResult &RHS, 5864 CastKind &Kind); 5865 5866 // CheckSingleAssignmentConstraints - Currently used by 5867 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5868 // this routine performs the default function/array converions. 5869 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5870 ExprResult &RHS, 5871 bool Diagnose = true); 5872 5873 // \brief If the lhs type is a transparent union, check whether we 5874 // can initialize the transparent union with the given expression. 5875 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5876 ExprResult &RHS); 5877 5878 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5879 5880 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5881 5882 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5883 AssignmentAction Action, 5884 bool AllowExplicit = false); 5885 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5886 AssignmentAction Action, 5887 bool AllowExplicit, 5888 ImplicitConversionSequence& ICS); 5889 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5890 const ImplicitConversionSequence& ICS, 5891 AssignmentAction Action, 5892 CheckedConversionKind CCK 5893 = CCK_ImplicitConversion); 5894 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5895 const StandardConversionSequence& SCS, 5896 AssignmentAction Action, 5897 CheckedConversionKind CCK); 5898 5899 /// the following "Check" methods will return a valid/converted QualType 5900 /// or a null QualType (indicating an error diagnostic was issued). 5901 5902 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5903 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5904 ExprResult &RHS); 5905 QualType CheckPointerToMemberOperands( // C++ 5.5 5906 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5907 SourceLocation OpLoc, bool isIndirect); 5908 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5909 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5910 bool IsDivide); 5911 QualType CheckRemainderOperands( // C99 6.5.5 5912 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5913 bool IsCompAssign = false); 5914 QualType CheckAdditionOperands( // C99 6.5.6 5915 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5916 QualType* CompLHSTy = 0); 5917 QualType CheckSubtractionOperands( // C99 6.5.6 5918 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5919 QualType* CompLHSTy = 0); 5920 QualType CheckShiftOperands( // C99 6.5.7 5921 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5922 bool IsCompAssign = false); 5923 QualType CheckCompareOperands( // C99 6.5.8/9 5924 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5925 bool isRelational); 5926 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5927 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5928 bool IsCompAssign = false); 5929 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5930 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5931 // CheckAssignmentOperands is used for both simple and compound assignment. 5932 // For simple assignment, pass both expressions and a null converted type. 5933 // For compound assignment, pass both expressions and the converted type. 5934 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5935 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5936 5937 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5938 UnaryOperatorKind Opcode, Expr *Op); 5939 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5940 BinaryOperatorKind Opcode, 5941 Expr *LHS, Expr *RHS); 5942 ExprResult checkPseudoObjectRValue(Expr *E); 5943 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 5944 5945 QualType CheckConditionalOperands( // C99 6.5.15 5946 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5947 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5948 QualType CXXCheckConditionalOperands( // C++ 5.16 5949 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5950 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5951 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5952 bool *NonStandardCompositeType = 0); 5953 QualType FindCompositePointerType(SourceLocation Loc, 5954 ExprResult &E1, ExprResult &E2, 5955 bool *NonStandardCompositeType = 0) { 5956 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5957 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5958 NonStandardCompositeType); 5959 E1 = Owned(E1Tmp); 5960 E2 = Owned(E2Tmp); 5961 return Composite; 5962 } 5963 5964 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5965 SourceLocation QuestionLoc); 5966 5967 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5968 SourceLocation QuestionLoc); 5969 5970 /// type checking for vector binary operators. 5971 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5972 SourceLocation Loc, bool IsCompAssign); 5973 QualType GetSignedVectorType(QualType V); 5974 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5975 SourceLocation Loc, bool isRelational); 5976 QualType CheckVectorLogicalOperands(ExprResult LHS, ExprResult RHS, 5977 SourceLocation Loc); 5978 5979 /// type checking declaration initializers (C99 6.7.8) 5980 bool CheckForConstantInitializer(Expr *e, QualType t); 5981 5982 // type checking C++ declaration initializers (C++ [dcl.init]). 5983 5984 /// ReferenceCompareResult - Expresses the result of comparing two 5985 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5986 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5987 enum ReferenceCompareResult { 5988 /// Ref_Incompatible - The two types are incompatible, so direct 5989 /// reference binding is not possible. 5990 Ref_Incompatible = 0, 5991 /// Ref_Related - The two types are reference-related, which means 5992 /// that their unqualified forms (T1 and T2) are either the same 5993 /// or T1 is a base class of T2. 5994 Ref_Related, 5995 /// Ref_Compatible_With_Added_Qualification - The two types are 5996 /// reference-compatible with added qualification, meaning that 5997 /// they are reference-compatible and the qualifiers on T1 (cv1) 5998 /// are greater than the qualifiers on T2 (cv2). 5999 Ref_Compatible_With_Added_Qualification, 6000 /// Ref_Compatible - The two types are reference-compatible and 6001 /// have equivalent qualifiers (cv1 == cv2). 6002 Ref_Compatible 6003 }; 6004 6005 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6006 QualType T1, QualType T2, 6007 bool &DerivedToBase, 6008 bool &ObjCConversion, 6009 bool &ObjCLifetimeConversion); 6010 6011 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6012 Expr *CastExpr, CastKind &CastKind, 6013 ExprValueKind &VK, CXXCastPath &Path); 6014 6015 /// \brief Force an expression with unknown-type to an expression of the 6016 /// given type. 6017 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6018 6019 // CheckVectorCast - check type constraints for vectors. 6020 // Since vectors are an extension, there are no C standard reference for this. 6021 // We allow casting between vectors and integer datatypes of the same size. 6022 // returns true if the cast is invalid 6023 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6024 CastKind &Kind); 6025 6026 // CheckExtVectorCast - check type constraints for extended vectors. 6027 // Since vectors are an extension, there are no C standard reference for this. 6028 // We allow casting between vectors and integer datatypes of the same size, 6029 // or vectors and the element type of that vector. 6030 // returns the cast expr 6031 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6032 CastKind &Kind); 6033 6034 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6035 SourceLocation LParenLoc, 6036 Expr *CastExpr, 6037 SourceLocation RParenLoc); 6038 6039 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6040 6041 /// \brief Checks for invalid conversions and casts between 6042 /// retainable pointers and other pointer kinds. 6043 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6044 QualType castType, Expr *&op, 6045 CheckedConversionKind CCK); 6046 6047 Expr *stripARCUnbridgedCast(Expr *e); 6048 void diagnoseARCUnbridgedCast(Expr *e); 6049 6050 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6051 QualType ExprType); 6052 6053 /// checkRetainCycles - Check whether an Objective-C message send 6054 /// might create an obvious retain cycle. 6055 void checkRetainCycles(ObjCMessageExpr *msg); 6056 void checkRetainCycles(Expr *receiver, Expr *argument); 6057 6058 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6059 /// to weak/__unsafe_unretained type. 6060 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6061 6062 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6063 /// to weak/__unsafe_unretained expression. 6064 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6065 6066 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6067 /// \param Method - May be null. 6068 /// \param [out] ReturnType - The return type of the send. 6069 /// \return true iff there were any incompatible types. 6070 bool CheckMessageArgumentTypes(QualType ReceiverType, 6071 Expr **Args, unsigned NumArgs, Selector Sel, 6072 ObjCMethodDecl *Method, bool isClassMessage, 6073 bool isSuperMessage, 6074 SourceLocation lbrac, SourceLocation rbrac, 6075 QualType &ReturnType, ExprValueKind &VK); 6076 6077 /// \brief Determine the result of a message send expression based on 6078 /// the type of the receiver, the method expected to receive the message, 6079 /// and the form of the message send. 6080 QualType getMessageSendResultType(QualType ReceiverType, 6081 ObjCMethodDecl *Method, 6082 bool isClassMessage, bool isSuperMessage); 6083 6084 /// \brief If the given expression involves a message send to a method 6085 /// with a related result type, emit a note describing what happened. 6086 void EmitRelatedResultTypeNote(const Expr *E); 6087 6088 /// CheckBooleanCondition - Diagnose problems involving the use of 6089 /// the given expression as a boolean condition (e.g. in an if 6090 /// statement). Also performs the standard function and array 6091 /// decays, possibly changing the input variable. 6092 /// 6093 /// \param Loc - A location associated with the condition, e.g. the 6094 /// 'if' keyword. 6095 /// \return true iff there were any errors 6096 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6097 6098 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6099 Expr *SubExpr); 6100 6101 /// DiagnoseAssignmentAsCondition - Given that an expression is 6102 /// being used as a boolean condition, warn if it's an assignment. 6103 void DiagnoseAssignmentAsCondition(Expr *E); 6104 6105 /// \brief Redundant parentheses over an equality comparison can indicate 6106 /// that the user intended an assignment used as condition. 6107 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6108 6109 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6110 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6111 6112 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6113 /// the specified width and sign. If an overflow occurs, detect it and emit 6114 /// the specified diagnostic. 6115 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6116 unsigned NewWidth, bool NewSign, 6117 SourceLocation Loc, unsigned DiagID); 6118 6119 /// Checks that the Objective-C declaration is declared in the global scope. 6120 /// Emits an error and marks the declaration as invalid if it's not declared 6121 /// in the global scope. 6122 bool CheckObjCDeclScope(Decl *D); 6123 6124 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6125 /// and reports the appropriate diagnostics. Returns false on success. 6126 /// Can optionally return the value of the expression. 6127 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0, 6128 unsigned DiagId = 0, 6129 bool AllowFold = true); 6130 6131 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6132 /// the correct width, and that the field type is valid. 6133 /// Returns false on success. 6134 /// Can optionally return whether the bit-field is of width 0 6135 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6136 QualType FieldTy, const Expr *BitWidth, 6137 bool *ZeroWidth = 0); 6138 6139 enum CUDAFunctionTarget { 6140 CFT_Device, 6141 CFT_Global, 6142 CFT_Host, 6143 CFT_HostDevice 6144 }; 6145 6146 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6147 6148 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6149 CUDAFunctionTarget CalleeTarget); 6150 6151 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6152 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6153 IdentifyCUDATarget(Callee)); 6154 } 6155 6156 /// \name Code completion 6157 //@{ 6158 /// \brief Describes the context in which code completion occurs. 6159 enum ParserCompletionContext { 6160 /// \brief Code completion occurs at top-level or namespace context. 6161 PCC_Namespace, 6162 /// \brief Code completion occurs within a class, struct, or union. 6163 PCC_Class, 6164 /// \brief Code completion occurs within an Objective-C interface, protocol, 6165 /// or category. 6166 PCC_ObjCInterface, 6167 /// \brief Code completion occurs within an Objective-C implementation or 6168 /// category implementation 6169 PCC_ObjCImplementation, 6170 /// \brief Code completion occurs within the list of instance variables 6171 /// in an Objective-C interface, protocol, category, or implementation. 6172 PCC_ObjCInstanceVariableList, 6173 /// \brief Code completion occurs following one or more template 6174 /// headers. 6175 PCC_Template, 6176 /// \brief Code completion occurs following one or more template 6177 /// headers within a class. 6178 PCC_MemberTemplate, 6179 /// \brief Code completion occurs within an expression. 6180 PCC_Expression, 6181 /// \brief Code completion occurs within a statement, which may 6182 /// also be an expression or a declaration. 6183 PCC_Statement, 6184 /// \brief Code completion occurs at the beginning of the 6185 /// initialization statement (or expression) in a for loop. 6186 PCC_ForInit, 6187 /// \brief Code completion occurs within the condition of an if, 6188 /// while, switch, or for statement. 6189 PCC_Condition, 6190 /// \brief Code completion occurs within the body of a function on a 6191 /// recovery path, where we do not have a specific handle on our position 6192 /// in the grammar. 6193 PCC_RecoveryInFunction, 6194 /// \brief Code completion occurs where only a type is permitted. 6195 PCC_Type, 6196 /// \brief Code completion occurs in a parenthesized expression, which 6197 /// might also be a type cast. 6198 PCC_ParenthesizedExpression, 6199 /// \brief Code completion occurs within a sequence of declaration 6200 /// specifiers within a function, method, or block. 6201 PCC_LocalDeclarationSpecifiers 6202 }; 6203 6204 void CodeCompleteOrdinaryName(Scope *S, 6205 ParserCompletionContext CompletionContext); 6206 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6207 bool AllowNonIdentifiers, 6208 bool AllowNestedNameSpecifiers); 6209 6210 struct CodeCompleteExpressionData; 6211 void CodeCompleteExpression(Scope *S, 6212 const CodeCompleteExpressionData &Data); 6213 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6214 SourceLocation OpLoc, 6215 bool IsArrow); 6216 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6217 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6218 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6219 void CodeCompleteCase(Scope *S); 6220 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6221 void CodeCompleteInitializer(Scope *S, Decl *D); 6222 void CodeCompleteReturn(Scope *S); 6223 void CodeCompleteAfterIf(Scope *S); 6224 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6225 6226 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6227 bool EnteringContext); 6228 void CodeCompleteUsing(Scope *S); 6229 void CodeCompleteUsingDirective(Scope *S); 6230 void CodeCompleteNamespaceDecl(Scope *S); 6231 void CodeCompleteNamespaceAliasDecl(Scope *S); 6232 void CodeCompleteOperatorName(Scope *S); 6233 void CodeCompleteConstructorInitializer(Decl *Constructor, 6234 CXXCtorInitializer** Initializers, 6235 unsigned NumInitializers); 6236 6237 void CodeCompleteObjCAtDirective(Scope *S); 6238 void CodeCompleteObjCAtVisibility(Scope *S); 6239 void CodeCompleteObjCAtStatement(Scope *S); 6240 void CodeCompleteObjCAtExpression(Scope *S); 6241 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6242 void CodeCompleteObjCPropertyGetter(Scope *S); 6243 void CodeCompleteObjCPropertySetter(Scope *S); 6244 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6245 bool IsParameter); 6246 void CodeCompleteObjCMessageReceiver(Scope *S); 6247 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6248 IdentifierInfo **SelIdents, 6249 unsigned NumSelIdents, 6250 bool AtArgumentExpression); 6251 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6252 IdentifierInfo **SelIdents, 6253 unsigned NumSelIdents, 6254 bool AtArgumentExpression, 6255 bool IsSuper = false); 6256 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6257 IdentifierInfo **SelIdents, 6258 unsigned NumSelIdents, 6259 bool AtArgumentExpression, 6260 ObjCInterfaceDecl *Super = 0); 6261 void CodeCompleteObjCForCollection(Scope *S, 6262 DeclGroupPtrTy IterationVar); 6263 void CodeCompleteObjCSelector(Scope *S, 6264 IdentifierInfo **SelIdents, 6265 unsigned NumSelIdents); 6266 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6267 unsigned NumProtocols); 6268 void CodeCompleteObjCProtocolDecl(Scope *S); 6269 void CodeCompleteObjCInterfaceDecl(Scope *S); 6270 void CodeCompleteObjCSuperclass(Scope *S, 6271 IdentifierInfo *ClassName, 6272 SourceLocation ClassNameLoc); 6273 void CodeCompleteObjCImplementationDecl(Scope *S); 6274 void CodeCompleteObjCInterfaceCategory(Scope *S, 6275 IdentifierInfo *ClassName, 6276 SourceLocation ClassNameLoc); 6277 void CodeCompleteObjCImplementationCategory(Scope *S, 6278 IdentifierInfo *ClassName, 6279 SourceLocation ClassNameLoc); 6280 void CodeCompleteObjCPropertyDefinition(Scope *S); 6281 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6282 IdentifierInfo *PropertyName); 6283 void CodeCompleteObjCMethodDecl(Scope *S, 6284 bool IsInstanceMethod, 6285 ParsedType ReturnType); 6286 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6287 bool IsInstanceMethod, 6288 bool AtParameterName, 6289 ParsedType ReturnType, 6290 IdentifierInfo **SelIdents, 6291 unsigned NumSelIdents); 6292 void CodeCompletePreprocessorDirective(bool InConditional); 6293 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6294 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6295 void CodeCompletePreprocessorExpression(); 6296 void CodeCompletePreprocessorMacroArgument(Scope *S, 6297 IdentifierInfo *Macro, 6298 MacroInfo *MacroInfo, 6299 unsigned Argument); 6300 void CodeCompleteNaturalLanguage(); 6301 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6302 SmallVectorImpl<CodeCompletionResult> &Results); 6303 //@} 6304 6305 //===--------------------------------------------------------------------===// 6306 // Extra semantic analysis beyond the C type system 6307 6308public: 6309 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6310 unsigned ByteNo) const; 6311 6312private: 6313 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6314 const ArraySubscriptExpr *ASE=0, 6315 bool AllowOnePastEnd=true, bool IndexNegated=false); 6316 void CheckArrayAccess(const Expr *E); 6317 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6318 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6319 Expr **Args, unsigned NumArgs); 6320 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6321 6322 bool CheckablePrintfAttr(const FormatAttr *Format, Expr **Args, 6323 unsigned NumArgs, bool IsCXXMemberCall); 6324 bool CheckObjCString(Expr *Arg); 6325 6326 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6327 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6328 6329 bool SemaBuiltinVAStart(CallExpr *TheCall); 6330 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6331 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6332 6333public: 6334 // Used by C++ template instantiation. 6335 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6336 6337private: 6338 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6339 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6340 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6341 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6342 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6343 AtomicExpr::AtomicOp Op); 6344 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6345 llvm::APSInt &Result); 6346 6347 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6348 bool HasVAListArg, unsigned format_idx, 6349 unsigned firstDataArg, bool isPrintf, 6350 bool inFunctionCall = true); 6351 6352 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6353 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6354 unsigned format_idx, unsigned firstDataArg, 6355 bool isPrintf, bool inFunctionCall); 6356 6357 void CheckNonNullArguments(const NonNullAttr *NonNull, 6358 const Expr * const *ExprArgs, 6359 SourceLocation CallSiteLoc); 6360 6361 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6362 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6363 unsigned NumArgs, bool IsCXXMember, 6364 SourceLocation Loc, SourceRange Range); 6365 void CheckPrintfScanfArguments(Expr **Args, unsigned NumArgs, 6366 bool HasVAListArg, unsigned format_idx, 6367 unsigned firstDataArg, bool isPrintf, 6368 SourceLocation Loc, SourceRange range); 6369 6370 void CheckMemaccessArguments(const CallExpr *Call, 6371 unsigned BId, 6372 IdentifierInfo *FnName); 6373 6374 void CheckStrlcpycatArguments(const CallExpr *Call, 6375 IdentifierInfo *FnName); 6376 6377 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6378 SourceLocation ReturnLoc); 6379 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6380 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6381 6382 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6383 Expr *Init); 6384 6385 /// \brief The parser's current scope. 6386 /// 6387 /// The parser maintains this state here. 6388 Scope *CurScope; 6389 6390protected: 6391 friend class Parser; 6392 friend class InitializationSequence; 6393 friend class ASTReader; 6394 friend class ASTWriter; 6395 6396public: 6397 /// \brief Retrieve the parser's current scope. 6398 /// 6399 /// This routine must only be used when it is certain that semantic analysis 6400 /// and the parser are in precisely the same context, which is not the case 6401 /// when, e.g., we are performing any kind of template instantiation. 6402 /// Therefore, the only safe places to use this scope are in the parser 6403 /// itself and in routines directly invoked from the parser and *never* from 6404 /// template substitution or instantiation. 6405 Scope *getCurScope() const { return CurScope; } 6406 6407 Decl *getObjCDeclContext() const; 6408 6409 DeclContext *getCurLexicalContext() const { 6410 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6411 } 6412 6413 AvailabilityResult getCurContextAvailability() const; 6414}; 6415 6416/// \brief RAII object that enters a new expression evaluation context. 6417class EnterExpressionEvaluationContext { 6418 Sema &Actions; 6419 6420public: 6421 EnterExpressionEvaluationContext(Sema &Actions, 6422 Sema::ExpressionEvaluationContext NewContext) 6423 : Actions(Actions) { 6424 Actions.PushExpressionEvaluationContext(NewContext); 6425 } 6426 6427 ~EnterExpressionEvaluationContext() { 6428 Actions.PopExpressionEvaluationContext(); 6429 } 6430}; 6431 6432} // end namespace clang 6433 6434#endif 6435