Sema.h revision ac6260187b6b2f26faa9264d170d649a501f58a9
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Lex/ModuleLoader.h" 32#include "clang/Basic/Specifiers.h" 33#include "clang/Basic/TemplateKinds.h" 34#include "clang/Basic/TypeTraits.h" 35#include "clang/Basic/ExpressionTraits.h" 36#include "llvm/ADT/ArrayRef.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/SmallVector.h" 40#include <deque> 41#include <string> 42 43namespace llvm { 44 class APSInt; 45 template <typename ValueT> struct DenseMapInfo; 46 template <typename ValueT, typename ValueInfoT> class DenseSet; 47 class SmallBitVector; 48} 49 50namespace clang { 51 class ADLResult; 52 class ASTConsumer; 53 class ASTContext; 54 class ASTMutationListener; 55 class ASTReader; 56 class ASTWriter; 57 class ArrayType; 58 class AttributeList; 59 class BlockDecl; 60 class CXXBasePath; 61 class CXXBasePaths; 62 class CXXBindTemporaryExpr; 63 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 64 class CXXConstructorDecl; 65 class CXXConversionDecl; 66 class CXXDestructorDecl; 67 class CXXFieldCollector; 68 class CXXMemberCallExpr; 69 class CXXMethodDecl; 70 class CXXScopeSpec; 71 class CXXTemporary; 72 class CXXTryStmt; 73 class CallExpr; 74 class ClassTemplateDecl; 75 class ClassTemplatePartialSpecializationDecl; 76 class ClassTemplateSpecializationDecl; 77 class CodeCompleteConsumer; 78 class CodeCompletionAllocator; 79 class CodeCompletionResult; 80 class Decl; 81 class DeclAccessPair; 82 class DeclContext; 83 class DeclRefExpr; 84 class DeclaratorDecl; 85 class DeducedTemplateArgument; 86 class DependentDiagnostic; 87 class DesignatedInitExpr; 88 class Designation; 89 class EnumConstantDecl; 90 class Expr; 91 class ExtVectorType; 92 class ExternalSemaSource; 93 class FormatAttr; 94 class FriendDecl; 95 class FunctionDecl; 96 class FunctionProtoType; 97 class FunctionTemplateDecl; 98 class ImplicitConversionSequence; 99 class InitListExpr; 100 class InitializationKind; 101 class InitializationSequence; 102 class InitializedEntity; 103 class IntegerLiteral; 104 class LabelStmt; 105 class LambdaExpr; 106 class LangOptions; 107 class LocalInstantiationScope; 108 class LookupResult; 109 class MacroInfo; 110 class MultiLevelTemplateArgumentList; 111 class NamedDecl; 112 class NonNullAttr; 113 class ObjCCategoryDecl; 114 class ObjCCategoryImplDecl; 115 class ObjCCompatibleAliasDecl; 116 class ObjCContainerDecl; 117 class ObjCImplDecl; 118 class ObjCImplementationDecl; 119 class ObjCInterfaceDecl; 120 class ObjCIvarDecl; 121 template <class T> class ObjCList; 122 class ObjCMessageExpr; 123 class ObjCMethodDecl; 124 class ObjCPropertyDecl; 125 class ObjCProtocolDecl; 126 class OverloadCandidateSet; 127 class OverloadExpr; 128 class ParenListExpr; 129 class ParmVarDecl; 130 class Preprocessor; 131 class PseudoDestructorTypeStorage; 132 class PseudoObjectExpr; 133 class QualType; 134 class StandardConversionSequence; 135 class Stmt; 136 class StringLiteral; 137 class SwitchStmt; 138 class TargetAttributesSema; 139 class TemplateArgument; 140 class TemplateArgumentList; 141 class TemplateArgumentLoc; 142 class TemplateDecl; 143 class TemplateParameterList; 144 class TemplatePartialOrderingContext; 145 class TemplateTemplateParmDecl; 146 class Token; 147 class TypeAliasDecl; 148 class TypedefDecl; 149 class TypedefNameDecl; 150 class TypeLoc; 151 class UnqualifiedId; 152 class UnresolvedLookupExpr; 153 class UnresolvedMemberExpr; 154 class UnresolvedSetImpl; 155 class UnresolvedSetIterator; 156 class UsingDecl; 157 class UsingShadowDecl; 158 class ValueDecl; 159 class VarDecl; 160 class VisibilityAttr; 161 class VisibleDeclConsumer; 162 class IndirectFieldDecl; 163 164namespace sema { 165 class AccessedEntity; 166 class BlockScopeInfo; 167 class CompoundScopeInfo; 168 class DelayedDiagnostic; 169 class FunctionScopeInfo; 170 class LambdaScopeInfo; 171 class PossiblyUnreachableDiag; 172 class TemplateDeductionInfo; 173} 174 175// FIXME: No way to easily map from TemplateTypeParmTypes to 176// TemplateTypeParmDecls, so we have this horrible PointerUnion. 177typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 178 SourceLocation> UnexpandedParameterPack; 179 180/// Sema - This implements semantic analysis and AST building for C. 181class Sema { 182 Sema(const Sema&); // DO NOT IMPLEMENT 183 void operator=(const Sema&); // DO NOT IMPLEMENT 184 mutable const TargetAttributesSema* TheTargetAttributesSema; 185public: 186 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 187 typedef OpaquePtr<TemplateName> TemplateTy; 188 typedef OpaquePtr<QualType> TypeTy; 189 190 OpenCLOptions OpenCLFeatures; 191 FPOptions FPFeatures; 192 193 const LangOptions &LangOpts; 194 Preprocessor &PP; 195 ASTContext &Context; 196 ASTConsumer &Consumer; 197 DiagnosticsEngine &Diags; 198 SourceManager &SourceMgr; 199 200 /// \brief Flag indicating whether or not to collect detailed statistics. 201 bool CollectStats; 202 203 /// \brief Source of additional semantic information. 204 ExternalSemaSource *ExternalSource; 205 206 /// \brief Code-completion consumer. 207 CodeCompleteConsumer *CodeCompleter; 208 209 /// CurContext - This is the current declaration context of parsing. 210 DeclContext *CurContext; 211 212 /// \brief Generally null except when we temporarily switch decl contexts, 213 /// like in \see ActOnObjCTemporaryExitContainerContext. 214 DeclContext *OriginalLexicalContext; 215 216 /// VAListTagName - The declaration name corresponding to __va_list_tag. 217 /// This is used as part of a hack to omit that class from ADL results. 218 DeclarationName VAListTagName; 219 220 /// PackContext - Manages the stack for #pragma pack. An alignment 221 /// of 0 indicates default alignment. 222 void *PackContext; // Really a "PragmaPackStack*" 223 224 bool MSStructPragmaOn; // True when #pragma ms_struct on 225 226 /// VisContext - Manages the stack for #pragma GCC visibility. 227 void *VisContext; // Really a "PragmaVisStack*" 228 229 /// ExprNeedsCleanups - True if the current evaluation context 230 /// requires cleanups to be run at its conclusion. 231 bool ExprNeedsCleanups; 232 233 /// ExprCleanupObjects - This is the stack of objects requiring 234 /// cleanup that are created by the current full expression. The 235 /// element type here is ExprWithCleanups::Object. 236 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 237 238 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 239 240 /// \brief Stack containing information about each of the nested 241 /// function, block, and method scopes that are currently active. 242 /// 243 /// This array is never empty. Clients should ignore the first 244 /// element, which is used to cache a single FunctionScopeInfo 245 /// that's used to parse every top-level function. 246 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 247 248 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 249 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 250 ExtVectorDeclsType; 251 252 /// ExtVectorDecls - This is a list all the extended vector types. This allows 253 /// us to associate a raw vector type with one of the ext_vector type names. 254 /// This is only necessary for issuing pretty diagnostics. 255 ExtVectorDeclsType ExtVectorDecls; 256 257 /// \brief The set of types for which we have already complained about the 258 /// definitions being hidden. 259 /// 260 /// This set is used to suppress redundant diagnostics. 261 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 262 263 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 264 OwningPtr<CXXFieldCollector> FieldCollector; 265 266 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 267 268 /// PureVirtualClassDiagSet - a set of class declarations which we have 269 /// emitted a list of pure virtual functions. Used to prevent emitting the 270 /// same list more than once. 271 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 272 273 /// ParsingInitForAutoVars - a set of declarations with auto types for which 274 /// we are currently parsing the initializer. 275 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 276 277 /// \brief A mapping from external names to the most recent 278 /// locally-scoped external declaration with that name. 279 /// 280 /// This map contains external declarations introduced in local 281 /// scoped, e.g., 282 /// 283 /// \code 284 /// void f() { 285 /// void foo(int, int); 286 /// } 287 /// \endcode 288 /// 289 /// Here, the name "foo" will be associated with the declaration on 290 /// "foo" within f. This name is not visible outside of 291 /// "f". However, we still find it in two cases: 292 /// 293 /// - If we are declaring another external with the name "foo", we 294 /// can find "foo" as a previous declaration, so that the types 295 /// of this external declaration can be checked for 296 /// compatibility. 297 /// 298 /// - If we would implicitly declare "foo" (e.g., due to a call to 299 /// "foo" in C when no prototype or definition is visible), then 300 /// we find this declaration of "foo" and complain that it is 301 /// not visible. 302 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 303 304 /// \brief Look for a locally scoped external declaration by the given name. 305 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 306 findLocallyScopedExternalDecl(DeclarationName Name); 307 308 typedef LazyVector<VarDecl *, ExternalSemaSource, 309 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 310 TentativeDefinitionsType; 311 312 /// \brief All the tentative definitions encountered in the TU. 313 TentativeDefinitionsType TentativeDefinitions; 314 315 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 316 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 317 UnusedFileScopedDeclsType; 318 319 /// \brief The set of file scoped decls seen so far that have not been used 320 /// and must warn if not used. Only contains the first declaration. 321 UnusedFileScopedDeclsType UnusedFileScopedDecls; 322 323 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 324 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 325 DelegatingCtorDeclsType; 326 327 /// \brief All the delegating constructors seen so far in the file, used for 328 /// cycle detection at the end of the TU. 329 DelegatingCtorDeclsType DelegatingCtorDecls; 330 331 /// \brief All the overriding destructors seen during a class definition 332 /// (there could be multiple due to nested classes) that had their exception 333 /// spec checks delayed, plus the overridden destructor. 334 SmallVector<std::pair<const CXXDestructorDecl*, 335 const CXXDestructorDecl*>, 2> 336 DelayedDestructorExceptionSpecChecks; 337 338 /// \brief Callback to the parser to parse templated functions when needed. 339 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 340 LateTemplateParserCB *LateTemplateParser; 341 void *OpaqueParser; 342 343 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 344 LateTemplateParser = LTP; 345 OpaqueParser = P; 346 } 347 348 class DelayedDiagnostics; 349 350 class ParsingDeclState { 351 unsigned SavedStackSize; 352 friend class Sema::DelayedDiagnostics; 353 }; 354 355 class ProcessingContextState { 356 unsigned SavedParsingDepth; 357 unsigned SavedActiveStackBase; 358 friend class Sema::DelayedDiagnostics; 359 }; 360 361 /// A class which encapsulates the logic for delaying diagnostics 362 /// during parsing and other processing. 363 class DelayedDiagnostics { 364 /// \brief The stack of diagnostics that were delayed due to being 365 /// produced during the parsing of a declaration. 366 sema::DelayedDiagnostic *Stack; 367 368 /// \brief The number of objects on the delayed-diagnostics stack. 369 unsigned StackSize; 370 371 /// \brief The current capacity of the delayed-diagnostics stack. 372 unsigned StackCapacity; 373 374 /// \brief The index of the first "active" delayed diagnostic in 375 /// the stack. When parsing class definitions, we ignore active 376 /// delayed diagnostics from the surrounding context. 377 unsigned ActiveStackBase; 378 379 /// \brief The depth of the declarations we're currently parsing. 380 /// This gets saved and reset whenever we enter a class definition. 381 unsigned ParsingDepth; 382 383 public: 384 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 385 ActiveStackBase(0), ParsingDepth(0) {} 386 387 ~DelayedDiagnostics() { 388 delete[] reinterpret_cast<char*>(Stack); 389 } 390 391 /// Adds a delayed diagnostic. 392 void add(const sema::DelayedDiagnostic &diag); 393 394 /// Determines whether diagnostics should be delayed. 395 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 396 397 /// Observe that we've started parsing a declaration. Access and 398 /// deprecation diagnostics will be delayed; when the declaration 399 /// is completed, all active delayed diagnostics will be evaluated 400 /// in its context, and then active diagnostics stack will be 401 /// popped down to the saved depth. 402 ParsingDeclState pushParsingDecl() { 403 ParsingDepth++; 404 405 ParsingDeclState state; 406 state.SavedStackSize = StackSize; 407 return state; 408 } 409 410 /// Observe that we're completed parsing a declaration. 411 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 412 413 /// Observe that we've started processing a different context, the 414 /// contents of which are semantically separate from the 415 /// declarations it may lexically appear in. This sets aside the 416 /// current stack of active diagnostics and starts afresh. 417 ProcessingContextState pushContext() { 418 assert(StackSize >= ActiveStackBase); 419 420 ProcessingContextState state; 421 state.SavedParsingDepth = ParsingDepth; 422 state.SavedActiveStackBase = ActiveStackBase; 423 424 ActiveStackBase = StackSize; 425 ParsingDepth = 0; 426 427 return state; 428 } 429 430 /// Observe that we've stopped processing a context. This 431 /// restores the previous stack of active diagnostics. 432 void popContext(ProcessingContextState state) { 433 assert(ActiveStackBase == StackSize); 434 assert(ParsingDepth == 0); 435 ActiveStackBase = state.SavedActiveStackBase; 436 ParsingDepth = state.SavedParsingDepth; 437 } 438 } DelayedDiagnostics; 439 440 /// A RAII object to temporarily push a declaration context. 441 class ContextRAII { 442 private: 443 Sema &S; 444 DeclContext *SavedContext; 445 ProcessingContextState SavedContextState; 446 447 public: 448 ContextRAII(Sema &S, DeclContext *ContextToPush) 449 : S(S), SavedContext(S.CurContext), 450 SavedContextState(S.DelayedDiagnostics.pushContext()) 451 { 452 assert(ContextToPush && "pushing null context"); 453 S.CurContext = ContextToPush; 454 } 455 456 void pop() { 457 if (!SavedContext) return; 458 S.CurContext = SavedContext; 459 S.DelayedDiagnostics.popContext(SavedContextState); 460 SavedContext = 0; 461 } 462 463 ~ContextRAII() { 464 pop(); 465 } 466 }; 467 468 /// WeakUndeclaredIdentifiers - Identifiers contained in 469 /// #pragma weak before declared. rare. may alias another 470 /// identifier, declared or undeclared 471 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 472 473 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 474 /// #pragma redefine_extname before declared. Used in Solaris system headers 475 /// to define functions that occur in multiple standards to call the version 476 /// in the currently selected standard. 477 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 478 479 480 /// \brief Load weak undeclared identifiers from the external source. 481 void LoadExternalWeakUndeclaredIdentifiers(); 482 483 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 484 /// #pragma weak during processing of other Decls. 485 /// I couldn't figure out a clean way to generate these in-line, so 486 /// we store them here and handle separately -- which is a hack. 487 /// It would be best to refactor this. 488 SmallVector<Decl*,2> WeakTopLevelDecl; 489 490 IdentifierResolver IdResolver; 491 492 /// Translation Unit Scope - useful to Objective-C actions that need 493 /// to lookup file scope declarations in the "ordinary" C decl namespace. 494 /// For example, user-defined classes, built-in "id" type, etc. 495 Scope *TUScope; 496 497 /// \brief The C++ "std" namespace, where the standard library resides. 498 LazyDeclPtr StdNamespace; 499 500 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 501 /// standard library. 502 LazyDeclPtr StdBadAlloc; 503 504 /// \brief The C++ "std::initializer_list" template, which is defined in 505 /// <initializer_list>. 506 ClassTemplateDecl *StdInitializerList; 507 508 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 509 RecordDecl *CXXTypeInfoDecl; 510 511 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 512 RecordDecl *MSVCGuidDecl; 513 514 /// A flag to remember whether the implicit forms of operator new and delete 515 /// have been declared. 516 bool GlobalNewDeleteDeclared; 517 518 519 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 520 /// call was found yet. 521 bool ObjCShouldCallSuperDealloc; 522 /// A flag that is set when parsing a -finalize method and no [super finalize] 523 /// call was found yet. 524 bool ObjCShouldCallSuperFinalize; 525 526 /// \brief Describes how the expressions currently being parsed are 527 /// evaluated at run-time, if at all. 528 enum ExpressionEvaluationContext { 529 /// \brief The current expression and its subexpressions occur within an 530 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 531 /// \c sizeof, where the type of the expression may be significant but 532 /// no code will be generated to evaluate the value of the expression at 533 /// run time. 534 Unevaluated, 535 536 /// \brief The current context is "potentially evaluated" in C++11 terms, 537 /// but the expression is evaluated at compile-time (like the values of 538 /// cases in a switch statment). 539 ConstantEvaluated, 540 541 /// \brief The current expression is potentially evaluated at run time, 542 /// which means that code may be generated to evaluate the value of the 543 /// expression at run time. 544 PotentiallyEvaluated, 545 546 /// \brief The current expression is potentially evaluated, but any 547 /// declarations referenced inside that expression are only used if 548 /// in fact the current expression is used. 549 /// 550 /// This value is used when parsing default function arguments, for which 551 /// we would like to provide diagnostics (e.g., passing non-POD arguments 552 /// through varargs) but do not want to mark declarations as "referenced" 553 /// until the default argument is used. 554 PotentiallyEvaluatedIfUsed 555 }; 556 557 /// \brief Data structure used to record current or nested 558 /// expression evaluation contexts. 559 struct ExpressionEvaluationContextRecord { 560 /// \brief The expression evaluation context. 561 ExpressionEvaluationContext Context; 562 563 /// \brief Whether the enclosing context needed a cleanup. 564 bool ParentNeedsCleanups; 565 566 /// \brief Whether we are in a decltype expression. 567 bool IsDecltype; 568 569 /// \brief The number of active cleanup objects when we entered 570 /// this expression evaluation context. 571 unsigned NumCleanupObjects; 572 573 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 574 575 /// \brief The lambdas that are present within this context, if it 576 /// is indeed an unevaluated context. 577 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 578 579 /// \brief The declaration that provides context for the lambda expression 580 /// if the normal declaration context does not suffice, e.g., in a 581 /// default function argument. 582 Decl *LambdaContextDecl; 583 584 /// \brief The context information used to mangle lambda expressions 585 /// within this context. 586 /// 587 /// This mangling information is allocated lazily, since most contexts 588 /// do not have lambda expressions. 589 LambdaMangleContext *LambdaMangle; 590 591 /// \brief If we are processing a decltype type, a set of call expressions 592 /// for which we have deferred checking the completeness of the return type. 593 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls; 594 595 /// \brief If we are processing a decltype type, a set of temporary binding 596 /// expressions for which we have deferred checking the destructor. 597 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds; 598 599 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 600 unsigned NumCleanupObjects, 601 bool ParentNeedsCleanups, 602 Decl *LambdaContextDecl, 603 bool IsDecltype) 604 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 605 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 606 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 607 608 ~ExpressionEvaluationContextRecord() { 609 delete LambdaMangle; 610 } 611 612 /// \brief Retrieve the mangling context for lambdas. 613 LambdaMangleContext &getLambdaMangleContext() { 614 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 615 if (!LambdaMangle) 616 LambdaMangle = new LambdaMangleContext; 617 return *LambdaMangle; 618 } 619 }; 620 621 /// A stack of expression evaluation contexts. 622 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 623 624 /// SpecialMemberOverloadResult - The overloading result for a special member 625 /// function. 626 /// 627 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 628 /// integer is used to determine whether we have a parameter qualification 629 /// match, the second-lowest is whether we had success in resolving the 630 /// overload to a unique non-deleted function. 631 /// 632 /// The ConstParamMatch bit represents whether, when looking up a copy 633 /// constructor or assignment operator, we found a potential copy 634 /// constructor/assignment operator whose first parameter is const-qualified. 635 /// This is used for determining parameter types of other objects and is 636 /// utterly meaningless on other types of special members. 637 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 638 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 639 public: 640 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 641 : FastFoldingSetNode(ID) 642 {} 643 644 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 645 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 646 647 bool hasSuccess() const { return Pair.getInt() & 0x1; } 648 void setSuccess(bool B) { 649 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 650 } 651 652 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 653 void setConstParamMatch(bool B) { 654 Pair.setInt(B << 1 | unsigned(hasSuccess())); 655 } 656 }; 657 658 /// \brief A cache of special member function overload resolution results 659 /// for C++ records. 660 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 661 662 /// \brief The kind of translation unit we are processing. 663 /// 664 /// When we're processing a complete translation unit, Sema will perform 665 /// end-of-translation-unit semantic tasks (such as creating 666 /// initializers for tentative definitions in C) once parsing has 667 /// completed. Modules and precompiled headers perform different kinds of 668 /// checks. 669 TranslationUnitKind TUKind; 670 671 llvm::BumpPtrAllocator BumpAlloc; 672 673 /// \brief The number of SFINAE diagnostics that have been trapped. 674 unsigned NumSFINAEErrors; 675 676 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 677 UnparsedDefaultArgInstantiationsMap; 678 679 /// \brief A mapping from parameters with unparsed default arguments to the 680 /// set of instantiations of each parameter. 681 /// 682 /// This mapping is a temporary data structure used when parsing 683 /// nested class templates or nested classes of class templates, 684 /// where we might end up instantiating an inner class before the 685 /// default arguments of its methods have been parsed. 686 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 687 688 // Contains the locations of the beginning of unparsed default 689 // argument locations. 690 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 691 692 /// UndefinedInternals - all the used, undefined objects with 693 /// internal linkage in this translation unit. 694 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 695 696 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 697 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 698 699 /// Method Pool - allows efficient lookup when typechecking messages to "id". 700 /// We need to maintain a list, since selectors can have differing signatures 701 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 702 /// of selectors are "overloaded"). 703 GlobalMethodPool MethodPool; 704 705 /// Method selectors used in a @selector expression. Used for implementation 706 /// of -Wselector. 707 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 708 709 void ReadMethodPool(Selector Sel); 710 711 /// Private Helper predicate to check for 'self'. 712 bool isSelfExpr(Expr *RExpr); 713public: 714 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 715 TranslationUnitKind TUKind = TU_Complete, 716 CodeCompleteConsumer *CompletionConsumer = 0); 717 ~Sema(); 718 719 /// \brief Perform initialization that occurs after the parser has been 720 /// initialized but before it parses anything. 721 void Initialize(); 722 723 const LangOptions &getLangOptions() const { return LangOpts; } 724 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 725 FPOptions &getFPOptions() { return FPFeatures; } 726 727 DiagnosticsEngine &getDiagnostics() const { return Diags; } 728 SourceManager &getSourceManager() const { return SourceMgr; } 729 const TargetAttributesSema &getTargetAttributesSema() const; 730 Preprocessor &getPreprocessor() const { return PP; } 731 ASTContext &getASTContext() const { return Context; } 732 ASTConsumer &getASTConsumer() const { return Consumer; } 733 ASTMutationListener *getASTMutationListener() const; 734 735 void PrintStats() const; 736 737 /// \brief Helper class that creates diagnostics with optional 738 /// template instantiation stacks. 739 /// 740 /// This class provides a wrapper around the basic DiagnosticBuilder 741 /// class that emits diagnostics. SemaDiagnosticBuilder is 742 /// responsible for emitting the diagnostic (as DiagnosticBuilder 743 /// does) and, if the diagnostic comes from inside a template 744 /// instantiation, printing the template instantiation stack as 745 /// well. 746 class SemaDiagnosticBuilder : public DiagnosticBuilder { 747 Sema &SemaRef; 748 unsigned DiagID; 749 750 public: 751 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 752 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 753 754 explicit SemaDiagnosticBuilder(Sema &SemaRef) 755 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 756 757 ~SemaDiagnosticBuilder(); 758 }; 759 760 /// \brief Emit a diagnostic. 761 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 762 763 /// \brief Emit a partial diagnostic. 764 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 765 766 /// \brief Build a partial diagnostic. 767 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 768 769 bool findMacroSpelling(SourceLocation &loc, StringRef name); 770 771 /// \brief Get a string to suggest for zero-initialization of a type. 772 const char *getFixItZeroInitializerForType(QualType T) const; 773 774 ExprResult Owned(Expr* E) { return E; } 775 ExprResult Owned(ExprResult R) { return R; } 776 StmtResult Owned(Stmt* S) { return S; } 777 778 void ActOnEndOfTranslationUnit(); 779 780 void CheckDelegatingCtorCycles(); 781 782 Scope *getScopeForContext(DeclContext *Ctx); 783 784 void PushFunctionScope(); 785 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 786 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 787 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 788 const Decl *D = 0, const BlockExpr *blkExpr = 0); 789 790 sema::FunctionScopeInfo *getCurFunction() const { 791 return FunctionScopes.back(); 792 } 793 794 void PushCompoundScope(); 795 void PopCompoundScope(); 796 797 sema::CompoundScopeInfo &getCurCompoundScope() const; 798 799 bool hasAnyUnrecoverableErrorsInThisFunction() const; 800 801 /// \brief Retrieve the current block, if any. 802 sema::BlockScopeInfo *getCurBlock(); 803 804 /// \brief Retrieve the current lambda expression, if any. 805 sema::LambdaScopeInfo *getCurLambda(); 806 807 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 808 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 809 810 //===--------------------------------------------------------------------===// 811 // Type Analysis / Processing: SemaType.cpp. 812 // 813 814 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 815 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 816 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 817 } 818 QualType BuildPointerType(QualType T, 819 SourceLocation Loc, DeclarationName Entity); 820 QualType BuildReferenceType(QualType T, bool LValueRef, 821 SourceLocation Loc, DeclarationName Entity); 822 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 823 Expr *ArraySize, unsigned Quals, 824 SourceRange Brackets, DeclarationName Entity); 825 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 826 SourceLocation AttrLoc); 827 QualType BuildFunctionType(QualType T, 828 QualType *ParamTypes, unsigned NumParamTypes, 829 bool Variadic, bool HasTrailingReturn, 830 unsigned Quals, RefQualifierKind RefQualifier, 831 SourceLocation Loc, DeclarationName Entity, 832 FunctionType::ExtInfo Info); 833 QualType BuildMemberPointerType(QualType T, QualType Class, 834 SourceLocation Loc, 835 DeclarationName Entity); 836 QualType BuildBlockPointerType(QualType T, 837 SourceLocation Loc, DeclarationName Entity); 838 QualType BuildParenType(QualType T); 839 QualType BuildAtomicType(QualType T, SourceLocation Loc); 840 841 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 842 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 843 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 844 TypeSourceInfo *ReturnTypeInfo); 845 /// \brief Package the given type and TSI into a ParsedType. 846 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 847 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 848 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 849 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 850 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 851 bool CheckDistantExceptionSpec(QualType T); 852 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 853 bool CheckEquivalentExceptionSpec( 854 const FunctionProtoType *Old, SourceLocation OldLoc, 855 const FunctionProtoType *New, SourceLocation NewLoc); 856 bool CheckEquivalentExceptionSpec( 857 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 858 const FunctionProtoType *Old, SourceLocation OldLoc, 859 const FunctionProtoType *New, SourceLocation NewLoc, 860 bool *MissingExceptionSpecification = 0, 861 bool *MissingEmptyExceptionSpecification = 0, 862 bool AllowNoexceptAllMatchWithNoSpec = false, 863 bool IsOperatorNew = false); 864 bool CheckExceptionSpecSubset( 865 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 866 const FunctionProtoType *Superset, SourceLocation SuperLoc, 867 const FunctionProtoType *Subset, SourceLocation SubLoc); 868 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 869 const FunctionProtoType *Target, SourceLocation TargetLoc, 870 const FunctionProtoType *Source, SourceLocation SourceLoc); 871 872 TypeResult ActOnTypeName(Scope *S, Declarator &D); 873 874 /// \brief The parser has parsed the context-sensitive type 'instancetype' 875 /// in an Objective-C message declaration. Return the appropriate type. 876 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 877 878 bool RequireCompleteType(SourceLocation Loc, QualType T, 879 const PartialDiagnostic &PD, 880 std::pair<SourceLocation, PartialDiagnostic> Note); 881 bool RequireCompleteType(SourceLocation Loc, QualType T, 882 const PartialDiagnostic &PD); 883 bool RequireCompleteType(SourceLocation Loc, QualType T, 884 unsigned DiagID); 885 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 886 std::pair<SourceLocation, 887 PartialDiagnostic> Note); 888 889 bool RequireLiteralType(SourceLocation Loc, QualType T, 890 const PartialDiagnostic &PD); 891 892 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 893 const CXXScopeSpec &SS, QualType T); 894 895 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 896 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 897 QualType BuildUnaryTransformType(QualType BaseType, 898 UnaryTransformType::UTTKind UKind, 899 SourceLocation Loc); 900 901 //===--------------------------------------------------------------------===// 902 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 903 // 904 905 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 906 907 void DiagnoseUseOfUnimplementedSelectors(); 908 909 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 910 Scope *S, CXXScopeSpec *SS = 0, 911 bool isClassName = false, 912 bool HasTrailingDot = false, 913 ParsedType ObjectType = ParsedType(), 914 bool IsCtorOrDtorName = false, 915 bool WantNontrivialTypeSourceInfo = false, 916 IdentifierInfo **CorrectedII = 0); 917 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 918 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 919 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 920 SourceLocation IILoc, 921 Scope *S, 922 CXXScopeSpec *SS, 923 ParsedType &SuggestedType); 924 925 /// \brief Describes the result of the name lookup and resolution performed 926 /// by \c ClassifyName(). 927 enum NameClassificationKind { 928 NC_Unknown, 929 NC_Error, 930 NC_Keyword, 931 NC_Type, 932 NC_Expression, 933 NC_NestedNameSpecifier, 934 NC_TypeTemplate, 935 NC_FunctionTemplate 936 }; 937 938 class NameClassification { 939 NameClassificationKind Kind; 940 ExprResult Expr; 941 TemplateName Template; 942 ParsedType Type; 943 const IdentifierInfo *Keyword; 944 945 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 946 947 public: 948 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 949 950 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 951 952 NameClassification(const IdentifierInfo *Keyword) 953 : Kind(NC_Keyword), Keyword(Keyword) { } 954 955 static NameClassification Error() { 956 return NameClassification(NC_Error); 957 } 958 959 static NameClassification Unknown() { 960 return NameClassification(NC_Unknown); 961 } 962 963 static NameClassification NestedNameSpecifier() { 964 return NameClassification(NC_NestedNameSpecifier); 965 } 966 967 static NameClassification TypeTemplate(TemplateName Name) { 968 NameClassification Result(NC_TypeTemplate); 969 Result.Template = Name; 970 return Result; 971 } 972 973 static NameClassification FunctionTemplate(TemplateName Name) { 974 NameClassification Result(NC_FunctionTemplate); 975 Result.Template = Name; 976 return Result; 977 } 978 979 NameClassificationKind getKind() const { return Kind; } 980 981 ParsedType getType() const { 982 assert(Kind == NC_Type); 983 return Type; 984 } 985 986 ExprResult getExpression() const { 987 assert(Kind == NC_Expression); 988 return Expr; 989 } 990 991 TemplateName getTemplateName() const { 992 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 993 return Template; 994 } 995 996 TemplateNameKind getTemplateNameKind() const { 997 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 998 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 999 } 1000}; 1001 1002 /// \brief Perform name lookup on the given name, classifying it based on 1003 /// the results of name lookup and the following token. 1004 /// 1005 /// This routine is used by the parser to resolve identifiers and help direct 1006 /// parsing. When the identifier cannot be found, this routine will attempt 1007 /// to correct the typo and classify based on the resulting name. 1008 /// 1009 /// \param S The scope in which we're performing name lookup. 1010 /// 1011 /// \param SS The nested-name-specifier that precedes the name. 1012 /// 1013 /// \param Name The identifier. If typo correction finds an alternative name, 1014 /// this pointer parameter will be updated accordingly. 1015 /// 1016 /// \param NameLoc The location of the identifier. 1017 /// 1018 /// \param NextToken The token following the identifier. Used to help 1019 /// disambiguate the name. 1020 NameClassification ClassifyName(Scope *S, 1021 CXXScopeSpec &SS, 1022 IdentifierInfo *&Name, 1023 SourceLocation NameLoc, 1024 const Token &NextToken); 1025 1026 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1027 1028 Decl *HandleDeclarator(Scope *S, Declarator &D, 1029 MultiTemplateParamsArg TemplateParameterLists); 1030 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1031 const LookupResult &Previous, 1032 Scope *S); 1033 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1034 void DiagnoseFunctionSpecifiers(Declarator& D); 1035 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1036 void CheckShadow(Scope *S, VarDecl *D); 1037 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1038 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1039 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1040 TypeSourceInfo *TInfo, 1041 LookupResult &Previous); 1042 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1043 LookupResult &Previous, bool &Redeclaration); 1044 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1045 TypeSourceInfo *TInfo, 1046 LookupResult &Previous, 1047 MultiTemplateParamsArg TemplateParamLists); 1048 // Returns true if the variable declaration is a redeclaration 1049 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1050 void CheckCompleteVariableDeclaration(VarDecl *var); 1051 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1052 TypeSourceInfo *TInfo, 1053 LookupResult &Previous, 1054 MultiTemplateParamsArg TemplateParamLists, 1055 bool &AddToScope); 1056 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1057 1058 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1059 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1060 1061 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1062 // Returns true if the function declaration is a redeclaration 1063 bool CheckFunctionDeclaration(Scope *S, 1064 FunctionDecl *NewFD, LookupResult &Previous, 1065 bool IsExplicitSpecialization); 1066 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1067 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1068 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1069 SourceLocation Loc, 1070 QualType T); 1071 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1072 SourceLocation NameLoc, IdentifierInfo *Name, 1073 QualType T, TypeSourceInfo *TSInfo, 1074 StorageClass SC, StorageClass SCAsWritten); 1075 void ActOnParamDefaultArgument(Decl *param, 1076 SourceLocation EqualLoc, 1077 Expr *defarg); 1078 void ActOnParamUnparsedDefaultArgument(Decl *param, 1079 SourceLocation EqualLoc, 1080 SourceLocation ArgLoc); 1081 void ActOnParamDefaultArgumentError(Decl *param); 1082 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1083 SourceLocation EqualLoc); 1084 1085 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1086 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1087 bool TypeMayContainAuto); 1088 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1089 void ActOnInitializerError(Decl *Dcl); 1090 void ActOnCXXForRangeDecl(Decl *D); 1091 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1092 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1093 void FinalizeDeclaration(Decl *D); 1094 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1095 Decl **Group, 1096 unsigned NumDecls); 1097 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1098 bool TypeMayContainAuto = true); 1099 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1100 SourceLocation LocAfterDecls); 1101 void CheckForFunctionRedefinition(FunctionDecl *FD); 1102 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1103 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1104 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1105 1106 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1107 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1108 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1109 1110 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1111 /// attribute for which parsing is delayed. 1112 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1113 1114 /// \brief Diagnose any unused parameters in the given sequence of 1115 /// ParmVarDecl pointers. 1116 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1117 ParmVarDecl * const *End); 1118 1119 /// \brief Diagnose whether the size of parameters or return value of a 1120 /// function or obj-c method definition is pass-by-value and larger than a 1121 /// specified threshold. 1122 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1123 ParmVarDecl * const *End, 1124 QualType ReturnTy, 1125 NamedDecl *D); 1126 1127 void DiagnoseInvalidJumps(Stmt *Body); 1128 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1129 SourceLocation AsmLoc, 1130 SourceLocation RParenLoc); 1131 1132 /// \brief The parser has processed a module import declaration. 1133 /// 1134 /// \param AtLoc The location of the '@' symbol, if any. 1135 /// 1136 /// \param ImportLoc The location of the 'import' keyword. 1137 /// 1138 /// \param Path The module access path. 1139 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1140 ModuleIdPath Path); 1141 1142 /// \brief Retrieve a suitable printing policy. 1143 PrintingPolicy getPrintingPolicy() const { 1144 return getPrintingPolicy(Context, PP); 1145 } 1146 1147 /// \brief Retrieve a suitable printing policy. 1148 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1149 const Preprocessor &PP); 1150 1151 /// Scope actions. 1152 void ActOnPopScope(SourceLocation Loc, Scope *S); 1153 void ActOnTranslationUnitScope(Scope *S); 1154 1155 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1156 DeclSpec &DS); 1157 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1158 DeclSpec &DS, 1159 MultiTemplateParamsArg TemplateParams); 1160 1161 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1162 AccessSpecifier AS, 1163 RecordDecl *Record); 1164 1165 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1166 RecordDecl *Record); 1167 1168 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1169 TagTypeKind NewTag, bool isDefinition, 1170 SourceLocation NewTagLoc, 1171 const IdentifierInfo &Name); 1172 1173 enum TagUseKind { 1174 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1175 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1176 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1177 TUK_Friend // Friend declaration: 'friend struct foo;' 1178 }; 1179 1180 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1181 SourceLocation KWLoc, CXXScopeSpec &SS, 1182 IdentifierInfo *Name, SourceLocation NameLoc, 1183 AttributeList *Attr, AccessSpecifier AS, 1184 SourceLocation ModulePrivateLoc, 1185 MultiTemplateParamsArg TemplateParameterLists, 1186 bool &OwnedDecl, bool &IsDependent, 1187 SourceLocation ScopedEnumKWLoc, 1188 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1189 1190 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1191 unsigned TagSpec, SourceLocation TagLoc, 1192 CXXScopeSpec &SS, 1193 IdentifierInfo *Name, SourceLocation NameLoc, 1194 AttributeList *Attr, 1195 MultiTemplateParamsArg TempParamLists); 1196 1197 TypeResult ActOnDependentTag(Scope *S, 1198 unsigned TagSpec, 1199 TagUseKind TUK, 1200 const CXXScopeSpec &SS, 1201 IdentifierInfo *Name, 1202 SourceLocation TagLoc, 1203 SourceLocation NameLoc); 1204 1205 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1206 IdentifierInfo *ClassName, 1207 SmallVectorImpl<Decl *> &Decls); 1208 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1209 Declarator &D, Expr *BitfieldWidth); 1210 1211 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1212 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1213 AccessSpecifier AS); 1214 1215 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1216 TypeSourceInfo *TInfo, 1217 RecordDecl *Record, SourceLocation Loc, 1218 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1219 SourceLocation TSSL, 1220 AccessSpecifier AS, NamedDecl *PrevDecl, 1221 Declarator *D = 0); 1222 1223 enum CXXSpecialMember { 1224 CXXDefaultConstructor, 1225 CXXCopyConstructor, 1226 CXXMoveConstructor, 1227 CXXCopyAssignment, 1228 CXXMoveAssignment, 1229 CXXDestructor, 1230 CXXInvalid 1231 }; 1232 bool CheckNontrivialField(FieldDecl *FD); 1233 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1234 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1235 void ActOnLastBitfield(SourceLocation DeclStart, 1236 SmallVectorImpl<Decl *> &AllIvarDecls); 1237 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1238 Declarator &D, Expr *BitfieldWidth, 1239 tok::ObjCKeywordKind visibility); 1240 1241 // This is used for both record definitions and ObjC interface declarations. 1242 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1243 llvm::ArrayRef<Decl *> Fields, 1244 SourceLocation LBrac, SourceLocation RBrac, 1245 AttributeList *AttrList); 1246 1247 /// ActOnTagStartDefinition - Invoked when we have entered the 1248 /// scope of a tag's definition (e.g., for an enumeration, class, 1249 /// struct, or union). 1250 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1251 1252 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1253 1254 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1255 /// C++ record definition's base-specifiers clause and are starting its 1256 /// member declarations. 1257 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1258 SourceLocation FinalLoc, 1259 SourceLocation LBraceLoc); 1260 1261 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1262 /// the definition of a tag (enumeration, class, struct, or union). 1263 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1264 SourceLocation RBraceLoc); 1265 1266 void ActOnObjCContainerFinishDefinition(); 1267 1268 /// \brief Invoked when we must temporarily exit the objective-c container 1269 /// scope for parsing/looking-up C constructs. 1270 /// 1271 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1272 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1273 void ActOnObjCReenterContainerContext(DeclContext *DC); 1274 1275 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1276 /// error parsing the definition of a tag. 1277 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1278 1279 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1280 EnumConstantDecl *LastEnumConst, 1281 SourceLocation IdLoc, 1282 IdentifierInfo *Id, 1283 Expr *val); 1284 1285 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1286 SourceLocation IdLoc, IdentifierInfo *Id, 1287 AttributeList *Attrs, 1288 SourceLocation EqualLoc, Expr *Val); 1289 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1290 SourceLocation RBraceLoc, Decl *EnumDecl, 1291 Decl **Elements, unsigned NumElements, 1292 Scope *S, AttributeList *Attr); 1293 1294 DeclContext *getContainingDC(DeclContext *DC); 1295 1296 /// Set the current declaration context until it gets popped. 1297 void PushDeclContext(Scope *S, DeclContext *DC); 1298 void PopDeclContext(); 1299 1300 /// EnterDeclaratorContext - Used when we must lookup names in the context 1301 /// of a declarator's nested name specifier. 1302 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1303 void ExitDeclaratorContext(Scope *S); 1304 1305 /// Push the parameters of D, which must be a function, into scope. 1306 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1307 void ActOnExitFunctionContext() { PopDeclContext(); } 1308 1309 DeclContext *getFunctionLevelDeclContext(); 1310 1311 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1312 /// to the function decl for the function being parsed. If we're currently 1313 /// in a 'block', this returns the containing context. 1314 FunctionDecl *getCurFunctionDecl(); 1315 1316 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1317 /// the method decl for the method being parsed. If we're currently 1318 /// in a 'block', this returns the containing context. 1319 ObjCMethodDecl *getCurMethodDecl(); 1320 1321 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1322 /// or C function we're in, otherwise return null. If we're currently 1323 /// in a 'block', this returns the containing context. 1324 NamedDecl *getCurFunctionOrMethodDecl(); 1325 1326 /// Add this decl to the scope shadowed decl chains. 1327 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1328 1329 /// \brief Make the given externally-produced declaration visible at the 1330 /// top level scope. 1331 /// 1332 /// \param D The externally-produced declaration to push. 1333 /// 1334 /// \param Name The name of the externally-produced declaration. 1335 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1336 1337 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1338 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1339 /// true if 'D' belongs to the given declaration context. 1340 /// 1341 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1342 /// whether the declaration is in scope for the purposes of explicit template 1343 /// instantiation or specialization. The default is false. 1344 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1345 bool ExplicitInstantiationOrSpecialization = false); 1346 1347 /// Finds the scope corresponding to the given decl context, if it 1348 /// happens to be an enclosing scope. Otherwise return NULL. 1349 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1350 1351 /// Subroutines of ActOnDeclarator(). 1352 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1353 TypeSourceInfo *TInfo); 1354 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1355 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1356 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1357 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1358 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1359 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1360 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1361 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1362 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1363 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1364 1365 // AssignmentAction - This is used by all the assignment diagnostic functions 1366 // to represent what is actually causing the operation 1367 enum AssignmentAction { 1368 AA_Assigning, 1369 AA_Passing, 1370 AA_Returning, 1371 AA_Converting, 1372 AA_Initializing, 1373 AA_Sending, 1374 AA_Casting 1375 }; 1376 1377 /// C++ Overloading. 1378 enum OverloadKind { 1379 /// This is a legitimate overload: the existing declarations are 1380 /// functions or function templates with different signatures. 1381 Ovl_Overload, 1382 1383 /// This is not an overload because the signature exactly matches 1384 /// an existing declaration. 1385 Ovl_Match, 1386 1387 /// This is not an overload because the lookup results contain a 1388 /// non-function. 1389 Ovl_NonFunction 1390 }; 1391 OverloadKind CheckOverload(Scope *S, 1392 FunctionDecl *New, 1393 const LookupResult &OldDecls, 1394 NamedDecl *&OldDecl, 1395 bool IsForUsingDecl); 1396 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1397 1398 /// \brief Checks availability of the function depending on the current 1399 /// function context.Inside an unavailable function,unavailability is ignored. 1400 /// 1401 /// \returns true if \arg FD is unavailable and current context is inside 1402 /// an available function, false otherwise. 1403 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1404 1405 ImplicitConversionSequence 1406 TryImplicitConversion(Expr *From, QualType ToType, 1407 bool SuppressUserConversions, 1408 bool AllowExplicit, 1409 bool InOverloadResolution, 1410 bool CStyle, 1411 bool AllowObjCWritebackConversion); 1412 1413 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1414 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1415 bool IsComplexPromotion(QualType FromType, QualType ToType); 1416 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1417 bool InOverloadResolution, 1418 QualType& ConvertedType, bool &IncompatibleObjC); 1419 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1420 QualType& ConvertedType, bool &IncompatibleObjC); 1421 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1422 QualType &ConvertedType); 1423 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1424 QualType& ConvertedType); 1425 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1426 const FunctionProtoType *NewType, 1427 unsigned *ArgPos = 0); 1428 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1429 QualType FromType, QualType ToType); 1430 1431 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1432 bool CheckPointerConversion(Expr *From, QualType ToType, 1433 CastKind &Kind, 1434 CXXCastPath& BasePath, 1435 bool IgnoreBaseAccess); 1436 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1437 bool InOverloadResolution, 1438 QualType &ConvertedType); 1439 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1440 CastKind &Kind, 1441 CXXCastPath &BasePath, 1442 bool IgnoreBaseAccess); 1443 bool IsQualificationConversion(QualType FromType, QualType ToType, 1444 bool CStyle, bool &ObjCLifetimeConversion); 1445 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1446 QualType &ResultTy); 1447 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1448 1449 1450 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1451 const VarDecl *NRVOCandidate, 1452 QualType ResultType, 1453 Expr *Value, 1454 bool AllowNRVO = true); 1455 1456 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1457 ExprResult Init); 1458 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1459 SourceLocation EqualLoc, 1460 ExprResult Init, 1461 bool TopLevelOfInitList = false, 1462 bool AllowExplicit = false); 1463 ExprResult PerformObjectArgumentInitialization(Expr *From, 1464 NestedNameSpecifier *Qualifier, 1465 NamedDecl *FoundDecl, 1466 CXXMethodDecl *Method); 1467 1468 ExprResult PerformContextuallyConvertToBool(Expr *From); 1469 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1470 1471 /// Contexts in which a converted constant expression is required. 1472 enum CCEKind { 1473 CCEK_CaseValue, ///< Expression in a case label. 1474 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1475 CCEK_TemplateArg ///< Value of a non-type template parameter. 1476 }; 1477 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1478 llvm::APSInt &Value, CCEKind CCE); 1479 1480 ExprResult 1481 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1482 const PartialDiagnostic &NotIntDiag, 1483 const PartialDiagnostic &IncompleteDiag, 1484 const PartialDiagnostic &ExplicitConvDiag, 1485 const PartialDiagnostic &ExplicitConvNote, 1486 const PartialDiagnostic &AmbigDiag, 1487 const PartialDiagnostic &AmbigNote, 1488 const PartialDiagnostic &ConvDiag, 1489 bool AllowScopedEnumerations); 1490 1491 ExprResult PerformObjectMemberConversion(Expr *From, 1492 NestedNameSpecifier *Qualifier, 1493 NamedDecl *FoundDecl, 1494 NamedDecl *Member); 1495 1496 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1497 // TODO: make this is a typesafe union. 1498 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1499 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1500 1501 void AddOverloadCandidate(FunctionDecl *Function, 1502 DeclAccessPair FoundDecl, 1503 llvm::ArrayRef<Expr *> Args, 1504 OverloadCandidateSet& CandidateSet, 1505 bool SuppressUserConversions = false, 1506 bool PartialOverloading = false, 1507 bool AllowExplicit = false); 1508 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1509 llvm::ArrayRef<Expr *> Args, 1510 OverloadCandidateSet& CandidateSet, 1511 bool SuppressUserConversions = false); 1512 void AddMethodCandidate(DeclAccessPair FoundDecl, 1513 QualType ObjectType, 1514 Expr::Classification ObjectClassification, 1515 Expr **Args, unsigned NumArgs, 1516 OverloadCandidateSet& CandidateSet, 1517 bool SuppressUserConversion = false); 1518 void AddMethodCandidate(CXXMethodDecl *Method, 1519 DeclAccessPair FoundDecl, 1520 CXXRecordDecl *ActingContext, QualType ObjectType, 1521 Expr::Classification ObjectClassification, 1522 llvm::ArrayRef<Expr *> Args, 1523 OverloadCandidateSet& CandidateSet, 1524 bool SuppressUserConversions = false); 1525 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1526 DeclAccessPair FoundDecl, 1527 CXXRecordDecl *ActingContext, 1528 TemplateArgumentListInfo *ExplicitTemplateArgs, 1529 QualType ObjectType, 1530 Expr::Classification ObjectClassification, 1531 llvm::ArrayRef<Expr *> Args, 1532 OverloadCandidateSet& CandidateSet, 1533 bool SuppressUserConversions = false); 1534 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1535 DeclAccessPair FoundDecl, 1536 TemplateArgumentListInfo *ExplicitTemplateArgs, 1537 llvm::ArrayRef<Expr *> Args, 1538 OverloadCandidateSet& CandidateSet, 1539 bool SuppressUserConversions = false); 1540 void AddConversionCandidate(CXXConversionDecl *Conversion, 1541 DeclAccessPair FoundDecl, 1542 CXXRecordDecl *ActingContext, 1543 Expr *From, QualType ToType, 1544 OverloadCandidateSet& CandidateSet); 1545 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1546 DeclAccessPair FoundDecl, 1547 CXXRecordDecl *ActingContext, 1548 Expr *From, QualType ToType, 1549 OverloadCandidateSet &CandidateSet); 1550 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1551 DeclAccessPair FoundDecl, 1552 CXXRecordDecl *ActingContext, 1553 const FunctionProtoType *Proto, 1554 Expr *Object, llvm::ArrayRef<Expr*> Args, 1555 OverloadCandidateSet& CandidateSet); 1556 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1557 SourceLocation OpLoc, 1558 Expr **Args, unsigned NumArgs, 1559 OverloadCandidateSet& CandidateSet, 1560 SourceRange OpRange = SourceRange()); 1561 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1562 Expr **Args, unsigned NumArgs, 1563 OverloadCandidateSet& CandidateSet, 1564 bool IsAssignmentOperator = false, 1565 unsigned NumContextualBoolArguments = 0); 1566 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1567 SourceLocation OpLoc, 1568 Expr **Args, unsigned NumArgs, 1569 OverloadCandidateSet& CandidateSet); 1570 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1571 bool Operator, SourceLocation Loc, 1572 llvm::ArrayRef<Expr *> Args, 1573 TemplateArgumentListInfo *ExplicitTemplateArgs, 1574 OverloadCandidateSet& CandidateSet, 1575 bool PartialOverloading = false, 1576 bool StdNamespaceIsAssociated = false); 1577 1578 // Emit as a 'note' the specific overload candidate 1579 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1580 1581 // Emit as a series of 'note's all template and non-templates 1582 // identified by the expression Expr 1583 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1584 1585 // [PossiblyAFunctionType] --> [Return] 1586 // NonFunctionType --> NonFunctionType 1587 // R (A) --> R(A) 1588 // R (*)(A) --> R (A) 1589 // R (&)(A) --> R (A) 1590 // R (S::*)(A) --> R (A) 1591 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1592 1593 FunctionDecl * 1594 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1595 QualType TargetType, 1596 bool Complain, 1597 DeclAccessPair &Found, 1598 bool *pHadMultipleCandidates = 0); 1599 1600 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1601 bool Complain = false, 1602 DeclAccessPair* Found = 0); 1603 1604 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1605 ExprResult &SrcExpr, 1606 bool DoFunctionPointerConverion = false, 1607 bool Complain = false, 1608 const SourceRange& OpRangeForComplaining = SourceRange(), 1609 QualType DestTypeForComplaining = QualType(), 1610 unsigned DiagIDForComplaining = 0); 1611 1612 1613 Expr *FixOverloadedFunctionReference(Expr *E, 1614 DeclAccessPair FoundDecl, 1615 FunctionDecl *Fn); 1616 ExprResult FixOverloadedFunctionReference(ExprResult, 1617 DeclAccessPair FoundDecl, 1618 FunctionDecl *Fn); 1619 1620 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1621 llvm::ArrayRef<Expr *> Args, 1622 OverloadCandidateSet &CandidateSet, 1623 bool PartialOverloading = false); 1624 1625 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1626 UnresolvedLookupExpr *ULE, 1627 SourceLocation LParenLoc, 1628 Expr **Args, unsigned NumArgs, 1629 SourceLocation RParenLoc, 1630 Expr *ExecConfig, 1631 bool AllowTypoCorrection=true); 1632 1633 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1634 unsigned Opc, 1635 const UnresolvedSetImpl &Fns, 1636 Expr *input); 1637 1638 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1639 unsigned Opc, 1640 const UnresolvedSetImpl &Fns, 1641 Expr *LHS, Expr *RHS); 1642 1643 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1644 SourceLocation RLoc, 1645 Expr *Base,Expr *Idx); 1646 1647 ExprResult 1648 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1649 SourceLocation LParenLoc, Expr **Args, 1650 unsigned NumArgs, SourceLocation RParenLoc); 1651 ExprResult 1652 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1653 Expr **Args, unsigned NumArgs, 1654 SourceLocation RParenLoc); 1655 1656 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1657 SourceLocation OpLoc); 1658 1659 /// CheckCallReturnType - Checks that a call expression's return type is 1660 /// complete. Returns true on failure. The location passed in is the location 1661 /// that best represents the call. 1662 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1663 CallExpr *CE, FunctionDecl *FD); 1664 1665 /// Helpers for dealing with blocks and functions. 1666 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1667 bool CheckParameterNames); 1668 void CheckCXXDefaultArguments(FunctionDecl *FD); 1669 void CheckExtraCXXDefaultArguments(Declarator &D); 1670 Scope *getNonFieldDeclScope(Scope *S); 1671 1672 /// \name Name lookup 1673 /// 1674 /// These routines provide name lookup that is used during semantic 1675 /// analysis to resolve the various kinds of names (identifiers, 1676 /// overloaded operator names, constructor names, etc.) into zero or 1677 /// more declarations within a particular scope. The major entry 1678 /// points are LookupName, which performs unqualified name lookup, 1679 /// and LookupQualifiedName, which performs qualified name lookup. 1680 /// 1681 /// All name lookup is performed based on some specific criteria, 1682 /// which specify what names will be visible to name lookup and how 1683 /// far name lookup should work. These criteria are important both 1684 /// for capturing language semantics (certain lookups will ignore 1685 /// certain names, for example) and for performance, since name 1686 /// lookup is often a bottleneck in the compilation of C++. Name 1687 /// lookup criteria is specified via the LookupCriteria enumeration. 1688 /// 1689 /// The results of name lookup can vary based on the kind of name 1690 /// lookup performed, the current language, and the translation 1691 /// unit. In C, for example, name lookup will either return nothing 1692 /// (no entity found) or a single declaration. In C++, name lookup 1693 /// can additionally refer to a set of overloaded functions or 1694 /// result in an ambiguity. All of the possible results of name 1695 /// lookup are captured by the LookupResult class, which provides 1696 /// the ability to distinguish among them. 1697 //@{ 1698 1699 /// @brief Describes the kind of name lookup to perform. 1700 enum LookupNameKind { 1701 /// Ordinary name lookup, which finds ordinary names (functions, 1702 /// variables, typedefs, etc.) in C and most kinds of names 1703 /// (functions, variables, members, types, etc.) in C++. 1704 LookupOrdinaryName = 0, 1705 /// Tag name lookup, which finds the names of enums, classes, 1706 /// structs, and unions. 1707 LookupTagName, 1708 /// Label name lookup. 1709 LookupLabel, 1710 /// Member name lookup, which finds the names of 1711 /// class/struct/union members. 1712 LookupMemberName, 1713 /// Look up of an operator name (e.g., operator+) for use with 1714 /// operator overloading. This lookup is similar to ordinary name 1715 /// lookup, but will ignore any declarations that are class members. 1716 LookupOperatorName, 1717 /// Look up of a name that precedes the '::' scope resolution 1718 /// operator in C++. This lookup completely ignores operator, object, 1719 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1720 LookupNestedNameSpecifierName, 1721 /// Look up a namespace name within a C++ using directive or 1722 /// namespace alias definition, ignoring non-namespace names (C++ 1723 /// [basic.lookup.udir]p1). 1724 LookupNamespaceName, 1725 /// Look up all declarations in a scope with the given name, 1726 /// including resolved using declarations. This is appropriate 1727 /// for checking redeclarations for a using declaration. 1728 LookupUsingDeclName, 1729 /// Look up an ordinary name that is going to be redeclared as a 1730 /// name with linkage. This lookup ignores any declarations that 1731 /// are outside of the current scope unless they have linkage. See 1732 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1733 LookupRedeclarationWithLinkage, 1734 /// Look up the name of an Objective-C protocol. 1735 LookupObjCProtocolName, 1736 /// Look up implicit 'self' parameter of an objective-c method. 1737 LookupObjCImplicitSelfParam, 1738 /// \brief Look up any declaration with any name. 1739 LookupAnyName 1740 }; 1741 1742 /// \brief Specifies whether (or how) name lookup is being performed for a 1743 /// redeclaration (vs. a reference). 1744 enum RedeclarationKind { 1745 /// \brief The lookup is a reference to this name that is not for the 1746 /// purpose of redeclaring the name. 1747 NotForRedeclaration = 0, 1748 /// \brief The lookup results will be used for redeclaration of a name, 1749 /// if an entity by that name already exists. 1750 ForRedeclaration 1751 }; 1752 1753 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1754 CXXSpecialMember SM, 1755 bool ConstArg, 1756 bool VolatileArg, 1757 bool RValueThis, 1758 bool ConstThis, 1759 bool VolatileThis); 1760 1761private: 1762 bool CppLookupName(LookupResult &R, Scope *S); 1763 1764 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1765 // 1766 // The boolean value will be true to indicate that the namespace was loaded 1767 // from an AST/PCH file, or false otherwise. 1768 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1769 1770 /// \brief Whether we have already loaded known namespaces from an extenal 1771 /// source. 1772 bool LoadedExternalKnownNamespaces; 1773 1774public: 1775 /// \brief Look up a name, looking for a single declaration. Return 1776 /// null if the results were absent, ambiguous, or overloaded. 1777 /// 1778 /// It is preferable to use the elaborated form and explicitly handle 1779 /// ambiguity and overloaded. 1780 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1781 SourceLocation Loc, 1782 LookupNameKind NameKind, 1783 RedeclarationKind Redecl 1784 = NotForRedeclaration); 1785 bool LookupName(LookupResult &R, Scope *S, 1786 bool AllowBuiltinCreation = false); 1787 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1788 bool InUnqualifiedLookup = false); 1789 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1790 bool AllowBuiltinCreation = false, 1791 bool EnteringContext = false); 1792 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1793 RedeclarationKind Redecl 1794 = NotForRedeclaration); 1795 1796 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1797 QualType T1, QualType T2, 1798 UnresolvedSetImpl &Functions); 1799 1800 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1801 SourceLocation GnuLabelLoc = SourceLocation()); 1802 1803 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1804 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1805 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1806 unsigned Quals, 1807 bool *ConstParam = 0); 1808 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1809 bool RValueThis, unsigned ThisQuals, 1810 bool *ConstParam = 0); 1811 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1812 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1813 unsigned ThisQuals); 1814 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1815 1816 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1817 SourceLocation Loc, 1818 llvm::ArrayRef<Expr *> Args, 1819 ADLResult &Functions, 1820 bool StdNamespaceIsAssociated = false); 1821 1822 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1823 VisibleDeclConsumer &Consumer, 1824 bool IncludeGlobalScope = true); 1825 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1826 VisibleDeclConsumer &Consumer, 1827 bool IncludeGlobalScope = true); 1828 1829 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1830 Sema::LookupNameKind LookupKind, 1831 Scope *S, CXXScopeSpec *SS, 1832 CorrectionCandidateCallback &CCC, 1833 DeclContext *MemberContext = 0, 1834 bool EnteringContext = false, 1835 const ObjCObjectPointerType *OPT = 0); 1836 1837 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 1838 AssociatedNamespaceSet &AssociatedNamespaces, 1839 AssociatedClassSet &AssociatedClasses); 1840 1841 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1842 bool ConsiderLinkage, 1843 bool ExplicitInstantiationOrSpecialization); 1844 1845 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1846 //@} 1847 1848 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1849 SourceLocation IdLoc, 1850 bool TypoCorrection = false); 1851 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1852 Scope *S, bool ForRedeclaration, 1853 SourceLocation Loc); 1854 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1855 Scope *S); 1856 void AddKnownFunctionAttributes(FunctionDecl *FD); 1857 1858 // More parsing and symbol table subroutines. 1859 1860 // Decl attributes - this routine is the top level dispatcher. 1861 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1862 bool NonInheritable = true, bool Inheritable = true); 1863 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1864 bool NonInheritable = true, bool Inheritable = true); 1865 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1866 const AttributeList *AttrList); 1867 1868 void checkUnusedDeclAttributes(Declarator &D); 1869 1870 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1871 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1872 bool CheckNoReturnAttr(const AttributeList &attr); 1873 1874 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1875 bool &IncompleteImpl, unsigned DiagID); 1876 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1877 ObjCMethodDecl *MethodDecl, 1878 bool IsProtocolMethodDecl); 1879 1880 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1881 ObjCMethodDecl *Overridden, 1882 bool IsProtocolMethodDecl); 1883 1884 /// WarnExactTypedMethods - This routine issues a warning if method 1885 /// implementation declaration matches exactly that of its declaration. 1886 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1887 ObjCMethodDecl *MethodDecl, 1888 bool IsProtocolMethodDecl); 1889 1890 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1891 ObjCInterfaceDecl *IDecl); 1892 1893 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1894 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1895 1896 /// CheckProtocolMethodDefs - This routine checks unimplemented 1897 /// methods declared in protocol, and those referenced by it. 1898 /// \param IDecl - Used for checking for methods which may have been 1899 /// inherited. 1900 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1901 ObjCProtocolDecl *PDecl, 1902 bool& IncompleteImpl, 1903 const SelectorSet &InsMap, 1904 const SelectorSet &ClsMap, 1905 ObjCContainerDecl *CDecl); 1906 1907 /// CheckImplementationIvars - This routine checks if the instance variables 1908 /// listed in the implelementation match those listed in the interface. 1909 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1910 ObjCIvarDecl **Fields, unsigned nIvars, 1911 SourceLocation Loc); 1912 1913 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1914 /// remains unimplemented in the class or category @implementation. 1915 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1916 ObjCContainerDecl* IDecl, 1917 bool IncompleteImpl = false); 1918 1919 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1920 /// which must be implemented by this implementation. 1921 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1922 ObjCContainerDecl *CDecl, 1923 const SelectorSet &InsMap); 1924 1925 /// DefaultSynthesizeProperties - This routine default synthesizes all 1926 /// properties which must be synthesized in class's @implementation. 1927 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1928 ObjCInterfaceDecl *IDecl); 1929 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1930 1931 /// CollectImmediateProperties - This routine collects all properties in 1932 /// the class and its conforming protocols; but not those it its super class. 1933 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1934 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1935 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1936 1937 1938 /// LookupPropertyDecl - Looks up a property in the current class and all 1939 /// its protocols. 1940 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1941 IdentifierInfo *II); 1942 1943 /// Called by ActOnProperty to handle @property declarations in 1944 //// class extensions. 1945 Decl *HandlePropertyInClassExtension(Scope *S, 1946 SourceLocation AtLoc, 1947 FieldDeclarator &FD, 1948 Selector GetterSel, 1949 Selector SetterSel, 1950 const bool isAssign, 1951 const bool isReadWrite, 1952 const unsigned Attributes, 1953 const unsigned AttributesAsWritten, 1954 bool *isOverridingProperty, 1955 TypeSourceInfo *T, 1956 tok::ObjCKeywordKind MethodImplKind); 1957 1958 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1959 /// handle creating the ObjcPropertyDecl for a category or @interface. 1960 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1961 ObjCContainerDecl *CDecl, 1962 SourceLocation AtLoc, 1963 FieldDeclarator &FD, 1964 Selector GetterSel, 1965 Selector SetterSel, 1966 const bool isAssign, 1967 const bool isReadWrite, 1968 const unsigned Attributes, 1969 const unsigned AttributesAsWritten, 1970 TypeSourceInfo *T, 1971 tok::ObjCKeywordKind MethodImplKind, 1972 DeclContext *lexicalDC = 0); 1973 1974 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1975 /// warning) when atomic property has one but not the other user-declared 1976 /// setter or getter. 1977 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1978 ObjCContainerDecl* IDecl); 1979 1980 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1981 1982 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1983 1984 enum MethodMatchStrategy { 1985 MMS_loose, 1986 MMS_strict 1987 }; 1988 1989 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1990 /// true, or false, accordingly. 1991 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1992 const ObjCMethodDecl *PrevMethod, 1993 MethodMatchStrategy strategy = MMS_strict); 1994 1995 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1996 /// or protocol against those declared in their implementations. 1997 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1998 const SelectorSet &ClsMap, 1999 SelectorSet &InsMapSeen, 2000 SelectorSet &ClsMapSeen, 2001 ObjCImplDecl* IMPDecl, 2002 ObjCContainerDecl* IDecl, 2003 bool &IncompleteImpl, 2004 bool ImmediateClass, 2005 bool WarnCategoryMethodImpl=false); 2006 2007 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2008 /// category matches with those implemented in its primary class and 2009 /// warns each time an exact match is found. 2010 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2011 2012 /// \brief Add the given method to the list of globally-known methods. 2013 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2014 2015private: 2016 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2017 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2018 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2019 2020 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2021 /// optionally warns if there are multiple signatures. 2022 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2023 bool receiverIdOrClass, 2024 bool warn, bool instance); 2025 2026public: 2027 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2028 /// unit are added to a global pool. This allows us to efficiently associate 2029 /// a selector with a method declaraation for purposes of typechecking 2030 /// messages sent to "id" (where the class of the object is unknown). 2031 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2032 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2033 } 2034 2035 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2036 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2037 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2038 } 2039 2040 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2041 /// pool. 2042 void AddAnyMethodToGlobalPool(Decl *D); 2043 2044 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2045 /// there are multiple signatures. 2046 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2047 bool receiverIdOrClass=false, 2048 bool warn=true) { 2049 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2050 warn, /*instance*/true); 2051 } 2052 2053 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2054 /// there are multiple signatures. 2055 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2056 bool receiverIdOrClass=false, 2057 bool warn=true) { 2058 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2059 warn, /*instance*/false); 2060 } 2061 2062 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2063 /// implementation. 2064 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2065 2066 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2067 /// initialization. 2068 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2069 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2070 2071 //===--------------------------------------------------------------------===// 2072 // Statement Parsing Callbacks: SemaStmt.cpp. 2073public: 2074 class FullExprArg { 2075 public: 2076 FullExprArg(Sema &actions) : E(0) { } 2077 2078 // FIXME: The const_cast here is ugly. RValue references would make this 2079 // much nicer (or we could duplicate a bunch of the move semantics 2080 // emulation code from Ownership.h). 2081 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2082 2083 ExprResult release() { 2084 return move(E); 2085 } 2086 2087 Expr *get() const { return E; } 2088 2089 Expr *operator->() { 2090 return E; 2091 } 2092 2093 private: 2094 // FIXME: No need to make the entire Sema class a friend when it's just 2095 // Sema::MakeFullExpr that needs access to the constructor below. 2096 friend class Sema; 2097 2098 explicit FullExprArg(Expr *expr) : E(expr) {} 2099 2100 Expr *E; 2101 }; 2102 2103 FullExprArg MakeFullExpr(Expr *Arg) { 2104 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2105 } 2106 2107 StmtResult ActOnExprStmt(FullExprArg Expr); 2108 2109 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2110 bool HasLeadingEmptyMacro = false); 2111 2112 void ActOnStartOfCompoundStmt(); 2113 void ActOnFinishOfCompoundStmt(); 2114 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2115 MultiStmtArg Elts, 2116 bool isStmtExpr); 2117 2118 /// \brief A RAII object to enter scope of a compound statement. 2119 class CompoundScopeRAII { 2120 public: 2121 CompoundScopeRAII(Sema &S): S(S) { 2122 S.ActOnStartOfCompoundStmt(); 2123 } 2124 2125 ~CompoundScopeRAII() { 2126 S.ActOnFinishOfCompoundStmt(); 2127 } 2128 2129 private: 2130 Sema &S; 2131 }; 2132 2133 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2134 SourceLocation StartLoc, 2135 SourceLocation EndLoc); 2136 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2137 StmtResult ActOnForEachLValueExpr(Expr *E); 2138 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2139 SourceLocation DotDotDotLoc, Expr *RHSVal, 2140 SourceLocation ColonLoc); 2141 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2142 2143 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2144 SourceLocation ColonLoc, 2145 Stmt *SubStmt, Scope *CurScope); 2146 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2147 SourceLocation ColonLoc, Stmt *SubStmt); 2148 2149 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2150 FullExprArg CondVal, Decl *CondVar, 2151 Stmt *ThenVal, 2152 SourceLocation ElseLoc, Stmt *ElseVal); 2153 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2154 Expr *Cond, 2155 Decl *CondVar); 2156 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2157 Stmt *Switch, Stmt *Body); 2158 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2159 FullExprArg Cond, 2160 Decl *CondVar, Stmt *Body); 2161 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2162 SourceLocation WhileLoc, 2163 SourceLocation CondLParen, Expr *Cond, 2164 SourceLocation CondRParen); 2165 2166 StmtResult ActOnForStmt(SourceLocation ForLoc, 2167 SourceLocation LParenLoc, 2168 Stmt *First, FullExprArg Second, 2169 Decl *SecondVar, 2170 FullExprArg Third, 2171 SourceLocation RParenLoc, 2172 Stmt *Body); 2173 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2174 Expr *collection); 2175 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2176 SourceLocation LParenLoc, 2177 Stmt *First, Expr *Second, 2178 SourceLocation RParenLoc, Stmt *Body); 2179 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2180 SourceLocation LParenLoc, Stmt *LoopVar, 2181 SourceLocation ColonLoc, Expr *Collection, 2182 SourceLocation RParenLoc); 2183 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2184 SourceLocation ColonLoc, 2185 Stmt *RangeDecl, Stmt *BeginEndDecl, 2186 Expr *Cond, Expr *Inc, 2187 Stmt *LoopVarDecl, 2188 SourceLocation RParenLoc); 2189 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2190 2191 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2192 SourceLocation LabelLoc, 2193 LabelDecl *TheDecl); 2194 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2195 SourceLocation StarLoc, 2196 Expr *DestExp); 2197 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2198 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2199 2200 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2201 bool AllowFunctionParameters); 2202 2203 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2204 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2205 2206 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2207 bool IsSimple, bool IsVolatile, 2208 unsigned NumOutputs, unsigned NumInputs, 2209 IdentifierInfo **Names, 2210 MultiExprArg Constraints, 2211 MultiExprArg Exprs, 2212 Expr *AsmString, 2213 MultiExprArg Clobbers, 2214 SourceLocation RParenLoc, 2215 bool MSAsm = false); 2216 2217 2218 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2219 SourceLocation StartLoc, 2220 SourceLocation IdLoc, IdentifierInfo *Id, 2221 bool Invalid = false); 2222 2223 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2224 2225 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2226 Decl *Parm, Stmt *Body); 2227 2228 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2229 2230 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2231 MultiStmtArg Catch, Stmt *Finally); 2232 2233 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2234 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2235 Scope *CurScope); 2236 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2237 Expr *operand); 2238 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2239 Expr *SynchExpr, 2240 Stmt *SynchBody); 2241 2242 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2243 2244 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2245 SourceLocation StartLoc, 2246 SourceLocation IdLoc, 2247 IdentifierInfo *Id); 2248 2249 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2250 2251 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2252 Decl *ExDecl, Stmt *HandlerBlock); 2253 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2254 MultiStmtArg Handlers); 2255 2256 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2257 SourceLocation TryLoc, 2258 Stmt *TryBlock, 2259 Stmt *Handler); 2260 2261 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2262 Expr *FilterExpr, 2263 Stmt *Block); 2264 2265 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2266 Stmt *Block); 2267 2268 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2269 2270 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2271 2272 /// \brief If it's a file scoped decl that must warn if not used, keep track 2273 /// of it. 2274 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2275 2276 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2277 /// whose result is unused, warn. 2278 void DiagnoseUnusedExprResult(const Stmt *S); 2279 void DiagnoseUnusedDecl(const NamedDecl *ND); 2280 2281 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2282 /// statement as a \p Body, and it is located on the same line. 2283 /// 2284 /// This helps prevent bugs due to typos, such as: 2285 /// if (condition); 2286 /// do_stuff(); 2287 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2288 const Stmt *Body, 2289 unsigned DiagID); 2290 2291 /// Warn if a for/while loop statement \p S, which is followed by 2292 /// \p PossibleBody, has a suspicious null statement as a body. 2293 void DiagnoseEmptyLoopBody(const Stmt *S, 2294 const Stmt *PossibleBody); 2295 2296 ParsingDeclState PushParsingDeclaration() { 2297 return DelayedDiagnostics.pushParsingDecl(); 2298 } 2299 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2300 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2301 } 2302 2303 typedef ProcessingContextState ParsingClassState; 2304 ParsingClassState PushParsingClass() { 2305 return DelayedDiagnostics.pushContext(); 2306 } 2307 void PopParsingClass(ParsingClassState state) { 2308 DelayedDiagnostics.popContext(state); 2309 } 2310 2311 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2312 SourceLocation Loc, 2313 const ObjCInterfaceDecl *UnknownObjCClass=0); 2314 2315 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2316 2317 bool makeUnavailableInSystemHeader(SourceLocation loc, 2318 StringRef message); 2319 2320 //===--------------------------------------------------------------------===// 2321 // Expression Parsing Callbacks: SemaExpr.cpp. 2322 2323 bool CanUseDecl(NamedDecl *D); 2324 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2325 const ObjCInterfaceDecl *UnknownObjCClass=0); 2326 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2327 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2328 ObjCMethodDecl *Getter, 2329 SourceLocation Loc); 2330 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2331 Expr **Args, unsigned NumArgs); 2332 2333 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2334 Decl *LambdaContextDecl = 0, 2335 bool IsDecltype = false); 2336 2337 void PopExpressionEvaluationContext(); 2338 2339 void DiscardCleanupsInEvaluationContext(); 2340 2341 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2342 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2343 2344 ExprResult ActOnConstantExpression(ExprResult Res); 2345 2346 // Functions for marking a declaration referenced. These functions also 2347 // contain the relevant logic for marking if a reference to a function or 2348 // variable is an odr-use (in the C++11 sense). There are separate variants 2349 // for expressions referring to a decl; these exist because odr-use marking 2350 // needs to be delayed for some constant variables when we build one of the 2351 // named expressions. 2352 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2353 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2354 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2355 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2356 void MarkDeclRefReferenced(DeclRefExpr *E); 2357 void MarkMemberReferenced(MemberExpr *E); 2358 2359 void UpdateMarkingForLValueToRValue(Expr *E); 2360 void CleanupVarDeclMarking(); 2361 2362 enum TryCaptureKind { 2363 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2364 }; 2365 2366 /// \brief Try to capture the given variable. 2367 /// 2368 /// \param Var The variable to capture. 2369 /// 2370 /// \param Loc The location at which the capture occurs. 2371 /// 2372 /// \param Kind The kind of capture, which may be implicit (for either a 2373 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2374 /// 2375 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2376 /// an explicit lambda capture. 2377 /// 2378 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2379 /// captures or diagnose errors. If false, this routine merely check whether 2380 /// the capture can occur without performing the capture itself or complaining 2381 /// if the variable cannot be captured. 2382 /// 2383 /// \param CaptureType Will be set to the type of the field used to capture 2384 /// this variable in the innermost block or lambda. Only valid when the 2385 /// variable can be captured. 2386 /// 2387 /// \param DeclRefType Will be set to the type of a refernce to the capture 2388 /// from within the current scope. Only valid when the variable can be 2389 /// captured. 2390 /// 2391 /// \returns true if an error occurred (i.e., the variable cannot be 2392 /// captured) and false if the capture succeeded. 2393 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2394 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2395 QualType &CaptureType, 2396 QualType &DeclRefType); 2397 2398 /// \brief Try to capture the given variable. 2399 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2400 TryCaptureKind Kind = TryCapture_Implicit, 2401 SourceLocation EllipsisLoc = SourceLocation()); 2402 2403 /// \brief Given a variable, determine the type that a reference to that 2404 /// variable will have in the given scope. 2405 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2406 2407 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2408 void MarkDeclarationsReferencedInExpr(Expr *E, 2409 bool SkipLocalVariables = false); 2410 2411 /// \brief Try to recover by turning the given expression into a 2412 /// call. Returns true if recovery was attempted or an error was 2413 /// emitted; this may also leave the ExprResult invalid. 2414 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2415 bool ForceComplain = false, 2416 bool (*IsPlausibleResult)(QualType) = 0); 2417 2418 /// \brief Figure out if an expression could be turned into a call. 2419 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2420 UnresolvedSetImpl &NonTemplateOverloads); 2421 2422 /// \brief Conditionally issue a diagnostic based on the current 2423 /// evaluation context. 2424 /// 2425 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2426 /// the function body is parsed, and then do a basic reachability analysis to 2427 /// determine if the statement is reachable. If it is unreachable, the 2428 /// diagnostic will not be emitted. 2429 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2430 const PartialDiagnostic &PD); 2431 2432 // Primary Expressions. 2433 SourceRange getExprRange(Expr *E) const; 2434 2435 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2436 SourceLocation TemplateKWLoc, 2437 UnqualifiedId &Id, 2438 bool HasTrailingLParen, bool IsAddressOfOperand, 2439 CorrectionCandidateCallback *CCC = 0); 2440 2441 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2442 TemplateArgumentListInfo &Buffer, 2443 DeclarationNameInfo &NameInfo, 2444 const TemplateArgumentListInfo *&TemplateArgs); 2445 2446 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2447 CorrectionCandidateCallback &CCC, 2448 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2449 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2450 2451 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2452 IdentifierInfo *II, 2453 bool AllowBuiltinCreation=false); 2454 2455 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2456 SourceLocation TemplateKWLoc, 2457 const DeclarationNameInfo &NameInfo, 2458 bool isAddressOfOperand, 2459 const TemplateArgumentListInfo *TemplateArgs); 2460 2461 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2462 ExprValueKind VK, 2463 SourceLocation Loc, 2464 const CXXScopeSpec *SS = 0); 2465 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2466 ExprValueKind VK, 2467 const DeclarationNameInfo &NameInfo, 2468 const CXXScopeSpec *SS = 0); 2469 ExprResult 2470 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2471 SourceLocation nameLoc, 2472 IndirectFieldDecl *indirectField, 2473 Expr *baseObjectExpr = 0, 2474 SourceLocation opLoc = SourceLocation()); 2475 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2476 SourceLocation TemplateKWLoc, 2477 LookupResult &R, 2478 const TemplateArgumentListInfo *TemplateArgs); 2479 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2480 SourceLocation TemplateKWLoc, 2481 LookupResult &R, 2482 const TemplateArgumentListInfo *TemplateArgs, 2483 bool IsDefiniteInstance); 2484 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2485 const LookupResult &R, 2486 bool HasTrailingLParen); 2487 2488 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2489 const DeclarationNameInfo &NameInfo); 2490 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2491 SourceLocation TemplateKWLoc, 2492 const DeclarationNameInfo &NameInfo, 2493 const TemplateArgumentListInfo *TemplateArgs); 2494 2495 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2496 LookupResult &R, 2497 bool NeedsADL); 2498 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2499 const DeclarationNameInfo &NameInfo, 2500 NamedDecl *D); 2501 2502 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2503 ExprResult ActOnNumericConstant(const Token &Tok); 2504 ExprResult ActOnCharacterConstant(const Token &Tok); 2505 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2506 ExprResult ActOnParenListExpr(SourceLocation L, 2507 SourceLocation R, 2508 MultiExprArg Val); 2509 2510 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2511 /// fragments (e.g. "foo" "bar" L"baz"). 2512 ExprResult ActOnStringLiteral(const Token *StringToks, 2513 unsigned NumStringToks); 2514 2515 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2516 SourceLocation DefaultLoc, 2517 SourceLocation RParenLoc, 2518 Expr *ControllingExpr, 2519 MultiTypeArg ArgTypes, 2520 MultiExprArg ArgExprs); 2521 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2522 SourceLocation DefaultLoc, 2523 SourceLocation RParenLoc, 2524 Expr *ControllingExpr, 2525 TypeSourceInfo **Types, 2526 Expr **Exprs, 2527 unsigned NumAssocs); 2528 2529 // Binary/Unary Operators. 'Tok' is the token for the operator. 2530 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2531 Expr *InputExpr); 2532 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2533 UnaryOperatorKind Opc, Expr *Input); 2534 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2535 tok::TokenKind Op, Expr *Input); 2536 2537 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2538 SourceLocation OpLoc, 2539 UnaryExprOrTypeTrait ExprKind, 2540 SourceRange R); 2541 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2542 UnaryExprOrTypeTrait ExprKind); 2543 ExprResult 2544 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2545 UnaryExprOrTypeTrait ExprKind, 2546 bool IsType, void *TyOrEx, 2547 const SourceRange &ArgRange); 2548 2549 ExprResult CheckPlaceholderExpr(Expr *E); 2550 bool CheckVecStepExpr(Expr *E); 2551 2552 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2553 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2554 SourceRange ExprRange, 2555 UnaryExprOrTypeTrait ExprKind); 2556 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2557 SourceLocation OpLoc, 2558 IdentifierInfo &Name, 2559 SourceLocation NameLoc, 2560 SourceLocation RParenLoc); 2561 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2562 tok::TokenKind Kind, Expr *Input); 2563 2564 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2565 Expr *Idx, SourceLocation RLoc); 2566 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2567 Expr *Idx, SourceLocation RLoc); 2568 2569 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2570 SourceLocation OpLoc, bool IsArrow, 2571 CXXScopeSpec &SS, 2572 SourceLocation TemplateKWLoc, 2573 NamedDecl *FirstQualifierInScope, 2574 const DeclarationNameInfo &NameInfo, 2575 const TemplateArgumentListInfo *TemplateArgs); 2576 2577 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2578 SourceLocation OpLoc, bool IsArrow, 2579 const CXXScopeSpec &SS, 2580 SourceLocation TemplateKWLoc, 2581 NamedDecl *FirstQualifierInScope, 2582 LookupResult &R, 2583 const TemplateArgumentListInfo *TemplateArgs, 2584 bool SuppressQualifierCheck = false); 2585 2586 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2587 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2588 bool &IsArrow, SourceLocation OpLoc, 2589 CXXScopeSpec &SS, 2590 Decl *ObjCImpDecl, 2591 bool HasTemplateArgs); 2592 2593 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2594 const CXXScopeSpec &SS, 2595 const LookupResult &R); 2596 2597 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2598 bool IsArrow, SourceLocation OpLoc, 2599 const CXXScopeSpec &SS, 2600 SourceLocation TemplateKWLoc, 2601 NamedDecl *FirstQualifierInScope, 2602 const DeclarationNameInfo &NameInfo, 2603 const TemplateArgumentListInfo *TemplateArgs); 2604 2605 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2606 SourceLocation OpLoc, 2607 tok::TokenKind OpKind, 2608 CXXScopeSpec &SS, 2609 SourceLocation TemplateKWLoc, 2610 UnqualifiedId &Member, 2611 Decl *ObjCImpDecl, 2612 bool HasTrailingLParen); 2613 2614 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2615 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2616 FunctionDecl *FDecl, 2617 const FunctionProtoType *Proto, 2618 Expr **Args, unsigned NumArgs, 2619 SourceLocation RParenLoc, 2620 bool ExecConfig = false); 2621 void CheckStaticArrayArgument(SourceLocation CallLoc, 2622 ParmVarDecl *Param, 2623 const Expr *ArgExpr); 2624 2625 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2626 /// This provides the location of the left/right parens and a list of comma 2627 /// locations. 2628 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2629 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2630 Expr *ExecConfig = 0, bool IsExecConfig = false); 2631 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2632 SourceLocation LParenLoc, 2633 Expr **Args, unsigned NumArgs, 2634 SourceLocation RParenLoc, 2635 Expr *Config = 0, 2636 bool IsExecConfig = false); 2637 2638 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2639 MultiExprArg ExecConfig, 2640 SourceLocation GGGLoc); 2641 2642 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2643 Declarator &D, ParsedType &Ty, 2644 SourceLocation RParenLoc, Expr *CastExpr); 2645 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2646 TypeSourceInfo *Ty, 2647 SourceLocation RParenLoc, 2648 Expr *Op); 2649 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2650 2651 /// \brief Build an altivec or OpenCL literal. 2652 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2653 SourceLocation RParenLoc, Expr *E, 2654 TypeSourceInfo *TInfo); 2655 2656 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2657 2658 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2659 ParsedType Ty, 2660 SourceLocation RParenLoc, 2661 Expr *InitExpr); 2662 2663 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2664 TypeSourceInfo *TInfo, 2665 SourceLocation RParenLoc, 2666 Expr *LiteralExpr); 2667 2668 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2669 MultiExprArg InitArgList, 2670 SourceLocation RBraceLoc); 2671 2672 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2673 SourceLocation Loc, 2674 bool GNUSyntax, 2675 ExprResult Init); 2676 2677 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2678 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2679 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2680 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2681 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2682 Expr *LHSExpr, Expr *RHSExpr); 2683 2684 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2685 /// in the case of a the GNU conditional expr extension. 2686 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2687 SourceLocation ColonLoc, 2688 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2689 2690 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2691 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2692 LabelDecl *TheDecl); 2693 2694 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2695 SourceLocation RPLoc); // "({..})" 2696 2697 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2698 struct OffsetOfComponent { 2699 SourceLocation LocStart, LocEnd; 2700 bool isBrackets; // true if [expr], false if .ident 2701 union { 2702 IdentifierInfo *IdentInfo; 2703 Expr *E; 2704 } U; 2705 }; 2706 2707 /// __builtin_offsetof(type, a.b[123][456].c) 2708 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2709 TypeSourceInfo *TInfo, 2710 OffsetOfComponent *CompPtr, 2711 unsigned NumComponents, 2712 SourceLocation RParenLoc); 2713 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2714 SourceLocation BuiltinLoc, 2715 SourceLocation TypeLoc, 2716 ParsedType ParsedArgTy, 2717 OffsetOfComponent *CompPtr, 2718 unsigned NumComponents, 2719 SourceLocation RParenLoc); 2720 2721 // __builtin_choose_expr(constExpr, expr1, expr2) 2722 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2723 Expr *CondExpr, Expr *LHSExpr, 2724 Expr *RHSExpr, SourceLocation RPLoc); 2725 2726 // __builtin_va_arg(expr, type) 2727 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2728 SourceLocation RPLoc); 2729 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2730 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2731 2732 // __null 2733 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2734 2735 bool CheckCaseExpression(Expr *E); 2736 2737 /// \brief Describes the result of an "if-exists" condition check. 2738 enum IfExistsResult { 2739 /// \brief The symbol exists. 2740 IER_Exists, 2741 2742 /// \brief The symbol does not exist. 2743 IER_DoesNotExist, 2744 2745 /// \brief The name is a dependent name, so the results will differ 2746 /// from one instantiation to the next. 2747 IER_Dependent, 2748 2749 /// \brief An error occurred. 2750 IER_Error 2751 }; 2752 2753 IfExistsResult 2754 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2755 const DeclarationNameInfo &TargetNameInfo); 2756 2757 IfExistsResult 2758 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2759 bool IsIfExists, CXXScopeSpec &SS, 2760 UnqualifiedId &Name); 2761 2762 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2763 bool IsIfExists, 2764 NestedNameSpecifierLoc QualifierLoc, 2765 DeclarationNameInfo NameInfo, 2766 Stmt *Nested); 2767 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2768 bool IsIfExists, 2769 CXXScopeSpec &SS, UnqualifiedId &Name, 2770 Stmt *Nested); 2771 2772 //===------------------------- "Block" Extension ------------------------===// 2773 2774 /// ActOnBlockStart - This callback is invoked when a block literal is 2775 /// started. 2776 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2777 2778 /// ActOnBlockArguments - This callback allows processing of block arguments. 2779 /// If there are no arguments, this is still invoked. 2780 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2781 2782 /// ActOnBlockError - If there is an error parsing a block, this callback 2783 /// is invoked to pop the information about the block from the action impl. 2784 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2785 2786 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2787 /// literal was successfully completed. ^(int x){...} 2788 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2789 Scope *CurScope); 2790 2791 //===---------------------------- OpenCL Features -----------------------===// 2792 2793 /// __builtin_astype(...) 2794 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2795 SourceLocation BuiltinLoc, 2796 SourceLocation RParenLoc); 2797 2798 //===---------------------------- C++ Features --------------------------===// 2799 2800 // Act on C++ namespaces 2801 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2802 SourceLocation NamespaceLoc, 2803 SourceLocation IdentLoc, 2804 IdentifierInfo *Ident, 2805 SourceLocation LBrace, 2806 AttributeList *AttrList); 2807 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2808 2809 NamespaceDecl *getStdNamespace() const; 2810 NamespaceDecl *getOrCreateStdNamespace(); 2811 2812 CXXRecordDecl *getStdBadAlloc() const; 2813 2814 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2815 /// it is and Element is not NULL, assigns the element type to Element. 2816 bool isStdInitializerList(QualType Ty, QualType *Element); 2817 2818 /// \brief Looks for the std::initializer_list template and instantiates it 2819 /// with Element, or emits an error if it's not found. 2820 /// 2821 /// \returns The instantiated template, or null on error. 2822 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2823 2824 /// \brief Determine whether Ctor is an initializer-list constructor, as 2825 /// defined in [dcl.init.list]p2. 2826 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2827 2828 Decl *ActOnUsingDirective(Scope *CurScope, 2829 SourceLocation UsingLoc, 2830 SourceLocation NamespcLoc, 2831 CXXScopeSpec &SS, 2832 SourceLocation IdentLoc, 2833 IdentifierInfo *NamespcName, 2834 AttributeList *AttrList); 2835 2836 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2837 2838 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2839 SourceLocation NamespaceLoc, 2840 SourceLocation AliasLoc, 2841 IdentifierInfo *Alias, 2842 CXXScopeSpec &SS, 2843 SourceLocation IdentLoc, 2844 IdentifierInfo *Ident); 2845 2846 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2847 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2848 const LookupResult &PreviousDecls); 2849 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2850 NamedDecl *Target); 2851 2852 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2853 bool isTypeName, 2854 const CXXScopeSpec &SS, 2855 SourceLocation NameLoc, 2856 const LookupResult &Previous); 2857 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2858 const CXXScopeSpec &SS, 2859 SourceLocation NameLoc); 2860 2861 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2862 SourceLocation UsingLoc, 2863 CXXScopeSpec &SS, 2864 const DeclarationNameInfo &NameInfo, 2865 AttributeList *AttrList, 2866 bool IsInstantiation, 2867 bool IsTypeName, 2868 SourceLocation TypenameLoc); 2869 2870 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2871 2872 Decl *ActOnUsingDeclaration(Scope *CurScope, 2873 AccessSpecifier AS, 2874 bool HasUsingKeyword, 2875 SourceLocation UsingLoc, 2876 CXXScopeSpec &SS, 2877 UnqualifiedId &Name, 2878 AttributeList *AttrList, 2879 bool IsTypeName, 2880 SourceLocation TypenameLoc); 2881 Decl *ActOnAliasDeclaration(Scope *CurScope, 2882 AccessSpecifier AS, 2883 MultiTemplateParamsArg TemplateParams, 2884 SourceLocation UsingLoc, 2885 UnqualifiedId &Name, 2886 TypeResult Type); 2887 2888 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2889 /// and sets it as the initializer for the the passed in VarDecl. 2890 bool InitializeVarWithConstructor(VarDecl *VD, 2891 CXXConstructorDecl *Constructor, 2892 MultiExprArg Exprs, 2893 bool HadMultipleCandidates); 2894 2895 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2896 /// including handling of its default argument expressions. 2897 /// 2898 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2899 ExprResult 2900 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2901 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2902 bool HadMultipleCandidates, bool RequiresZeroInit, 2903 unsigned ConstructKind, SourceRange ParenRange); 2904 2905 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2906 // the constructor can be elidable? 2907 ExprResult 2908 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2909 CXXConstructorDecl *Constructor, bool Elidable, 2910 MultiExprArg Exprs, bool HadMultipleCandidates, 2911 bool RequiresZeroInit, unsigned ConstructKind, 2912 SourceRange ParenRange); 2913 2914 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2915 /// the default expr if needed. 2916 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2917 FunctionDecl *FD, 2918 ParmVarDecl *Param); 2919 2920 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2921 /// constructed variable. 2922 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2923 2924 /// \brief Helper class that collects exception specifications for 2925 /// implicitly-declared special member functions. 2926 class ImplicitExceptionSpecification { 2927 // Pointer to allow copying 2928 ASTContext *Context; 2929 // We order exception specifications thus: 2930 // noexcept is the most restrictive, but is only used in C++0x. 2931 // throw() comes next. 2932 // Then a throw(collected exceptions) 2933 // Finally no specification. 2934 // throw(...) is used instead if any called function uses it. 2935 // 2936 // If this exception specification cannot be known yet (for instance, 2937 // because this is the exception specification for a defaulted default 2938 // constructor and we haven't finished parsing the deferred parts of the 2939 // class yet), the C++0x standard does not specify how to behave. We 2940 // record this as an 'unknown' exception specification, which overrules 2941 // any other specification (even 'none', to keep this rule simple). 2942 ExceptionSpecificationType ComputedEST; 2943 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2944 SmallVector<QualType, 4> Exceptions; 2945 2946 void ClearExceptions() { 2947 ExceptionsSeen.clear(); 2948 Exceptions.clear(); 2949 } 2950 2951 public: 2952 explicit ImplicitExceptionSpecification(ASTContext &Context) 2953 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2954 if (!Context.getLangOptions().CPlusPlus0x) 2955 ComputedEST = EST_DynamicNone; 2956 } 2957 2958 /// \brief Get the computed exception specification type. 2959 ExceptionSpecificationType getExceptionSpecType() const { 2960 assert(ComputedEST != EST_ComputedNoexcept && 2961 "noexcept(expr) should not be a possible result"); 2962 return ComputedEST; 2963 } 2964 2965 /// \brief The number of exceptions in the exception specification. 2966 unsigned size() const { return Exceptions.size(); } 2967 2968 /// \brief The set of exceptions in the exception specification. 2969 const QualType *data() const { return Exceptions.data(); } 2970 2971 /// \brief Integrate another called method into the collected data. 2972 void CalledDecl(CXXMethodDecl *Method); 2973 2974 /// \brief Integrate an invoked expression into the collected data. 2975 void CalledExpr(Expr *E); 2976 2977 /// \brief Specify that the exception specification can't be detemined yet. 2978 void SetDelayed() { 2979 ClearExceptions(); 2980 ComputedEST = EST_Delayed; 2981 } 2982 2983 FunctionProtoType::ExtProtoInfo getEPI() const { 2984 FunctionProtoType::ExtProtoInfo EPI; 2985 EPI.ExceptionSpecType = getExceptionSpecType(); 2986 EPI.NumExceptions = size(); 2987 EPI.Exceptions = data(); 2988 return EPI; 2989 } 2990 }; 2991 2992 /// \brief Determine what sort of exception specification a defaulted 2993 /// copy constructor of a class will have. 2994 ImplicitExceptionSpecification 2995 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2996 2997 /// \brief Determine what sort of exception specification a defaulted 2998 /// default constructor of a class will have, and whether the parameter 2999 /// will be const. 3000 std::pair<ImplicitExceptionSpecification, bool> 3001 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3002 3003 /// \brief Determine what sort of exception specification a defautled 3004 /// copy assignment operator of a class will have, and whether the 3005 /// parameter will be const. 3006 std::pair<ImplicitExceptionSpecification, bool> 3007 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3008 3009 /// \brief Determine what sort of exception specification a defaulted move 3010 /// constructor of a class will have. 3011 ImplicitExceptionSpecification 3012 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3013 3014 /// \brief Determine what sort of exception specification a defaulted move 3015 /// assignment operator of a class will have. 3016 ImplicitExceptionSpecification 3017 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3018 3019 /// \brief Determine what sort of exception specification a defaulted 3020 /// destructor of a class will have. 3021 ImplicitExceptionSpecification 3022 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3023 3024 /// \brief Determine if a special member function should have a deleted 3025 /// definition when it is defaulted. 3026 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 3027 3028 /// \brief Declare the implicit default constructor for the given class. 3029 /// 3030 /// \param ClassDecl The class declaration into which the implicit 3031 /// default constructor will be added. 3032 /// 3033 /// \returns The implicitly-declared default constructor. 3034 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3035 CXXRecordDecl *ClassDecl); 3036 3037 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3038 /// defining this constructor as the default constructor. 3039 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3040 CXXConstructorDecl *Constructor); 3041 3042 /// \brief Declare the implicit destructor for the given class. 3043 /// 3044 /// \param ClassDecl The class declaration into which the implicit 3045 /// destructor will be added. 3046 /// 3047 /// \returns The implicitly-declared destructor. 3048 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3049 3050 /// DefineImplicitDestructor - Checks for feasibility of 3051 /// defining this destructor as the default destructor. 3052 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3053 CXXDestructorDecl *Destructor); 3054 3055 /// \brief Build an exception spec for destructors that don't have one. 3056 /// 3057 /// C++11 says that user-defined destructors with no exception spec get one 3058 /// that looks as if the destructor was implicitly declared. 3059 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3060 CXXDestructorDecl *Destructor); 3061 3062 /// \brief Declare all inherited constructors for the given class. 3063 /// 3064 /// \param ClassDecl The class declaration into which the inherited 3065 /// constructors will be added. 3066 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3067 3068 /// \brief Declare the implicit copy constructor for the given class. 3069 /// 3070 /// \param ClassDecl The class declaration into which the implicit 3071 /// copy constructor will be added. 3072 /// 3073 /// \returns The implicitly-declared copy constructor. 3074 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3075 3076 /// DefineImplicitCopyConstructor - Checks for feasibility of 3077 /// defining this constructor as the copy constructor. 3078 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3079 CXXConstructorDecl *Constructor); 3080 3081 /// \brief Declare the implicit move constructor for the given class. 3082 /// 3083 /// \param ClassDecl The Class declaration into which the implicit 3084 /// move constructor will be added. 3085 /// 3086 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3087 /// declared. 3088 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3089 3090 /// DefineImplicitMoveConstructor - Checks for feasibility of 3091 /// defining this constructor as the move constructor. 3092 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3093 CXXConstructorDecl *Constructor); 3094 3095 /// \brief Declare the implicit copy assignment operator for the given class. 3096 /// 3097 /// \param ClassDecl The class declaration into which the implicit 3098 /// copy assignment operator will be added. 3099 /// 3100 /// \returns The implicitly-declared copy assignment operator. 3101 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3102 3103 /// \brief Defines an implicitly-declared copy assignment operator. 3104 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3105 CXXMethodDecl *MethodDecl); 3106 3107 /// \brief Declare the implicit move assignment operator for the given class. 3108 /// 3109 /// \param ClassDecl The Class declaration into which the implicit 3110 /// move assignment operator will be added. 3111 /// 3112 /// \returns The implicitly-declared move assignment operator, or NULL if it 3113 /// wasn't declared. 3114 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3115 3116 /// \brief Defines an implicitly-declared move assignment operator. 3117 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3118 CXXMethodDecl *MethodDecl); 3119 3120 /// \brief Force the declaration of any implicitly-declared members of this 3121 /// class. 3122 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3123 3124 /// \brief Determine whether the given function is an implicitly-deleted 3125 /// special member function. 3126 bool isImplicitlyDeleted(FunctionDecl *FD); 3127 3128 /// MaybeBindToTemporary - If the passed in expression has a record type with 3129 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3130 /// it simply returns the passed in expression. 3131 ExprResult MaybeBindToTemporary(Expr *E); 3132 3133 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3134 MultiExprArg ArgsPtr, 3135 SourceLocation Loc, 3136 ASTOwningVector<Expr*> &ConvertedArgs, 3137 bool AllowExplicit = false); 3138 3139 ParsedType getDestructorName(SourceLocation TildeLoc, 3140 IdentifierInfo &II, SourceLocation NameLoc, 3141 Scope *S, CXXScopeSpec &SS, 3142 ParsedType ObjectType, 3143 bool EnteringContext); 3144 3145 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3146 3147 // Checks that reinterpret casts don't have undefined behavior. 3148 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3149 bool IsDereference, SourceRange Range); 3150 3151 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3152 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3153 tok::TokenKind Kind, 3154 SourceLocation LAngleBracketLoc, 3155 Declarator &D, 3156 SourceLocation RAngleBracketLoc, 3157 SourceLocation LParenLoc, 3158 Expr *E, 3159 SourceLocation RParenLoc); 3160 3161 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3162 tok::TokenKind Kind, 3163 TypeSourceInfo *Ty, 3164 Expr *E, 3165 SourceRange AngleBrackets, 3166 SourceRange Parens); 3167 3168 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3169 SourceLocation TypeidLoc, 3170 TypeSourceInfo *Operand, 3171 SourceLocation RParenLoc); 3172 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3173 SourceLocation TypeidLoc, 3174 Expr *Operand, 3175 SourceLocation RParenLoc); 3176 3177 /// ActOnCXXTypeid - Parse typeid( something ). 3178 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3179 SourceLocation LParenLoc, bool isType, 3180 void *TyOrExpr, 3181 SourceLocation RParenLoc); 3182 3183 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3184 SourceLocation TypeidLoc, 3185 TypeSourceInfo *Operand, 3186 SourceLocation RParenLoc); 3187 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3188 SourceLocation TypeidLoc, 3189 Expr *Operand, 3190 SourceLocation RParenLoc); 3191 3192 /// ActOnCXXUuidof - Parse __uuidof( something ). 3193 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3194 SourceLocation LParenLoc, bool isType, 3195 void *TyOrExpr, 3196 SourceLocation RParenLoc); 3197 3198 3199 //// ActOnCXXThis - Parse 'this' pointer. 3200 ExprResult ActOnCXXThis(SourceLocation loc); 3201 3202 /// \brief Try to retrieve the type of the 'this' pointer. 3203 /// 3204 /// \param Capture If true, capture 'this' in this context. 3205 /// 3206 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3207 QualType getCurrentThisType(); 3208 3209 /// \brief Make sure the value of 'this' is actually available in the current 3210 /// context, if it is a potentially evaluated context. 3211 /// 3212 /// \param Loc The location at which the capture of 'this' occurs. 3213 /// 3214 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3215 /// capture list. 3216 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3217 3218 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3219 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3220 3221 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3222 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3223 3224 //// ActOnCXXThrow - Parse throw expressions. 3225 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3226 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3227 bool IsThrownVarInScope); 3228 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3229 bool IsThrownVarInScope); 3230 3231 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3232 /// Can be interpreted either as function-style casting ("int(x)") 3233 /// or class type construction ("ClassType(x,y,z)") 3234 /// or creation of a value-initialized type ("int()"). 3235 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3236 SourceLocation LParenLoc, 3237 MultiExprArg Exprs, 3238 SourceLocation RParenLoc); 3239 3240 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3241 SourceLocation LParenLoc, 3242 MultiExprArg Exprs, 3243 SourceLocation RParenLoc); 3244 3245 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3246 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3247 SourceLocation PlacementLParen, 3248 MultiExprArg PlacementArgs, 3249 SourceLocation PlacementRParen, 3250 SourceRange TypeIdParens, Declarator &D, 3251 Expr *Initializer); 3252 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3253 SourceLocation PlacementLParen, 3254 MultiExprArg PlacementArgs, 3255 SourceLocation PlacementRParen, 3256 SourceRange TypeIdParens, 3257 QualType AllocType, 3258 TypeSourceInfo *AllocTypeInfo, 3259 Expr *ArraySize, 3260 SourceRange DirectInitRange, 3261 Expr *Initializer, 3262 bool TypeMayContainAuto = true); 3263 3264 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3265 SourceRange R); 3266 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3267 bool UseGlobal, QualType AllocType, bool IsArray, 3268 Expr **PlaceArgs, unsigned NumPlaceArgs, 3269 FunctionDecl *&OperatorNew, 3270 FunctionDecl *&OperatorDelete); 3271 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3272 DeclarationName Name, Expr** Args, 3273 unsigned NumArgs, DeclContext *Ctx, 3274 bool AllowMissing, FunctionDecl *&Operator, 3275 bool Diagnose = true); 3276 void DeclareGlobalNewDelete(); 3277 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3278 QualType Argument, 3279 bool addMallocAttr = false); 3280 3281 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3282 DeclarationName Name, FunctionDecl* &Operator, 3283 bool Diagnose = true); 3284 3285 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3286 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3287 bool UseGlobal, bool ArrayForm, 3288 Expr *Operand); 3289 3290 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3291 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3292 SourceLocation StmtLoc, 3293 bool ConvertToBoolean); 3294 3295 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3296 Expr *Operand, SourceLocation RParen); 3297 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3298 SourceLocation RParen); 3299 3300 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3301 /// pseudo-functions. 3302 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3303 SourceLocation KWLoc, 3304 ParsedType Ty, 3305 SourceLocation RParen); 3306 3307 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3308 SourceLocation KWLoc, 3309 TypeSourceInfo *T, 3310 SourceLocation RParen); 3311 3312 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3313 /// pseudo-functions. 3314 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3315 SourceLocation KWLoc, 3316 ParsedType LhsTy, 3317 ParsedType RhsTy, 3318 SourceLocation RParen); 3319 3320 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3321 SourceLocation KWLoc, 3322 TypeSourceInfo *LhsT, 3323 TypeSourceInfo *RhsT, 3324 SourceLocation RParen); 3325 3326 /// \brief Parsed one of the type trait support pseudo-functions. 3327 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3328 ArrayRef<ParsedType> Args, 3329 SourceLocation RParenLoc); 3330 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3331 ArrayRef<TypeSourceInfo *> Args, 3332 SourceLocation RParenLoc); 3333 3334 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3335 /// pseudo-functions. 3336 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3337 SourceLocation KWLoc, 3338 ParsedType LhsTy, 3339 Expr *DimExpr, 3340 SourceLocation RParen); 3341 3342 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3343 SourceLocation KWLoc, 3344 TypeSourceInfo *TSInfo, 3345 Expr *DimExpr, 3346 SourceLocation RParen); 3347 3348 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3349 /// pseudo-functions. 3350 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3351 SourceLocation KWLoc, 3352 Expr *Queried, 3353 SourceLocation RParen); 3354 3355 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3356 SourceLocation KWLoc, 3357 Expr *Queried, 3358 SourceLocation RParen); 3359 3360 ExprResult ActOnStartCXXMemberReference(Scope *S, 3361 Expr *Base, 3362 SourceLocation OpLoc, 3363 tok::TokenKind OpKind, 3364 ParsedType &ObjectType, 3365 bool &MayBePseudoDestructor); 3366 3367 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3368 3369 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3370 SourceLocation OpLoc, 3371 tok::TokenKind OpKind, 3372 const CXXScopeSpec &SS, 3373 TypeSourceInfo *ScopeType, 3374 SourceLocation CCLoc, 3375 SourceLocation TildeLoc, 3376 PseudoDestructorTypeStorage DestroyedType, 3377 bool HasTrailingLParen); 3378 3379 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3380 SourceLocation OpLoc, 3381 tok::TokenKind OpKind, 3382 CXXScopeSpec &SS, 3383 UnqualifiedId &FirstTypeName, 3384 SourceLocation CCLoc, 3385 SourceLocation TildeLoc, 3386 UnqualifiedId &SecondTypeName, 3387 bool HasTrailingLParen); 3388 3389 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3390 SourceLocation OpLoc, 3391 tok::TokenKind OpKind, 3392 SourceLocation TildeLoc, 3393 const DeclSpec& DS, 3394 bool HasTrailingLParen); 3395 3396 /// MaybeCreateExprWithCleanups - If the current full-expression 3397 /// requires any cleanups, surround it with a ExprWithCleanups node. 3398 /// Otherwise, just returns the passed-in expression. 3399 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3400 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3401 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3402 3403 ExprResult ActOnFinishFullExpr(Expr *Expr); 3404 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3405 3406 // Marks SS invalid if it represents an incomplete type. 3407 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3408 3409 DeclContext *computeDeclContext(QualType T); 3410 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3411 bool EnteringContext = false); 3412 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3413 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3414 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3415 3416 /// \brief The parser has parsed a global nested-name-specifier '::'. 3417 /// 3418 /// \param S The scope in which this nested-name-specifier occurs. 3419 /// 3420 /// \param CCLoc The location of the '::'. 3421 /// 3422 /// \param SS The nested-name-specifier, which will be updated in-place 3423 /// to reflect the parsed nested-name-specifier. 3424 /// 3425 /// \returns true if an error occurred, false otherwise. 3426 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3427 CXXScopeSpec &SS); 3428 3429 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3430 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3431 3432 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3433 SourceLocation IdLoc, 3434 IdentifierInfo &II, 3435 ParsedType ObjectType); 3436 3437 bool BuildCXXNestedNameSpecifier(Scope *S, 3438 IdentifierInfo &Identifier, 3439 SourceLocation IdentifierLoc, 3440 SourceLocation CCLoc, 3441 QualType ObjectType, 3442 bool EnteringContext, 3443 CXXScopeSpec &SS, 3444 NamedDecl *ScopeLookupResult, 3445 bool ErrorRecoveryLookup); 3446 3447 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3448 /// 3449 /// \param S The scope in which this nested-name-specifier occurs. 3450 /// 3451 /// \param Identifier The identifier preceding the '::'. 3452 /// 3453 /// \param IdentifierLoc The location of the identifier. 3454 /// 3455 /// \param CCLoc The location of the '::'. 3456 /// 3457 /// \param ObjectType The type of the object, if we're parsing 3458 /// nested-name-specifier in a member access expression. 3459 /// 3460 /// \param EnteringContext Whether we're entering the context nominated by 3461 /// this nested-name-specifier. 3462 /// 3463 /// \param SS The nested-name-specifier, which is both an input 3464 /// parameter (the nested-name-specifier before this type) and an 3465 /// output parameter (containing the full nested-name-specifier, 3466 /// including this new type). 3467 /// 3468 /// \returns true if an error occurred, false otherwise. 3469 bool ActOnCXXNestedNameSpecifier(Scope *S, 3470 IdentifierInfo &Identifier, 3471 SourceLocation IdentifierLoc, 3472 SourceLocation CCLoc, 3473 ParsedType ObjectType, 3474 bool EnteringContext, 3475 CXXScopeSpec &SS); 3476 3477 ExprResult ActOnDecltypeExpression(Expr *E); 3478 3479 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3480 const DeclSpec &DS, 3481 SourceLocation ColonColonLoc); 3482 3483 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3484 IdentifierInfo &Identifier, 3485 SourceLocation IdentifierLoc, 3486 SourceLocation ColonLoc, 3487 ParsedType ObjectType, 3488 bool EnteringContext); 3489 3490 /// \brief The parser has parsed a nested-name-specifier 3491 /// 'template[opt] template-name < template-args >::'. 3492 /// 3493 /// \param S The scope in which this nested-name-specifier occurs. 3494 /// 3495 /// \param SS The nested-name-specifier, which is both an input 3496 /// parameter (the nested-name-specifier before this type) and an 3497 /// output parameter (containing the full nested-name-specifier, 3498 /// including this new type). 3499 /// 3500 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3501 /// \param TemplateName The template name. 3502 /// \param TemplateNameLoc The location of the template name. 3503 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3504 /// \param TemplateArgs The template arguments. 3505 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3506 /// \param CCLoc The location of the '::'. 3507 /// 3508 /// \param EnteringContext Whether we're entering the context of the 3509 /// nested-name-specifier. 3510 /// 3511 /// 3512 /// \returns true if an error occurred, false otherwise. 3513 bool ActOnCXXNestedNameSpecifier(Scope *S, 3514 CXXScopeSpec &SS, 3515 SourceLocation TemplateKWLoc, 3516 TemplateTy Template, 3517 SourceLocation TemplateNameLoc, 3518 SourceLocation LAngleLoc, 3519 ASTTemplateArgsPtr TemplateArgs, 3520 SourceLocation RAngleLoc, 3521 SourceLocation CCLoc, 3522 bool EnteringContext); 3523 3524 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3525 /// that the parser can use later to reconstruct the given 3526 /// nested-name-specifier. 3527 /// 3528 /// \param SS A nested-name-specifier. 3529 /// 3530 /// \returns A pointer containing all of the information in the 3531 /// nested-name-specifier \p SS. 3532 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3533 3534 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3535 /// the nested-name-specifier structure. 3536 /// 3537 /// \param Annotation The annotation pointer, produced by 3538 /// \c SaveNestedNameSpecifierAnnotation(). 3539 /// 3540 /// \param AnnotationRange The source range corresponding to the annotation. 3541 /// 3542 /// \param SS The nested-name-specifier that will be updated with the contents 3543 /// of the annotation pointer. 3544 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3545 SourceRange AnnotationRange, 3546 CXXScopeSpec &SS); 3547 3548 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3549 3550 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3551 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3552 /// After this method is called, according to [C++ 3.4.3p3], names should be 3553 /// looked up in the declarator-id's scope, until the declarator is parsed and 3554 /// ActOnCXXExitDeclaratorScope is called. 3555 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3556 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3557 3558 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3559 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3560 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3561 /// Used to indicate that names should revert to being looked up in the 3562 /// defining scope. 3563 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3564 3565 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3566 /// initializer for the declaration 'Dcl'. 3567 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3568 /// static data member of class X, names should be looked up in the scope of 3569 /// class X. 3570 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3571 3572 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3573 /// initializer for the declaration 'Dcl'. 3574 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3575 3576 /// \brief Create a new lambda closure type. 3577 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3578 bool KnownDependent = false); 3579 3580 /// \brief Start the definition of a lambda expression. 3581 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3582 SourceRange IntroducerRange, 3583 TypeSourceInfo *MethodType, 3584 SourceLocation EndLoc, 3585 llvm::ArrayRef<ParmVarDecl *> Params); 3586 3587 /// \brief Introduce the scope for a lambda expression. 3588 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3589 SourceRange IntroducerRange, 3590 LambdaCaptureDefault CaptureDefault, 3591 bool ExplicitParams, 3592 bool ExplicitResultType, 3593 bool Mutable); 3594 3595 /// \brief Note that we have finished the explicit captures for the 3596 /// given lambda. 3597 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3598 3599 /// \brief Introduce the lambda parameters into scope. 3600 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3601 3602 /// ActOnStartOfLambdaDefinition - This is called just before we start 3603 /// parsing the body of a lambda; it analyzes the explicit captures and 3604 /// arguments, and sets up various data-structures for the body of the 3605 /// lambda. 3606 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3607 Declarator &ParamInfo, Scope *CurScope); 3608 3609 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3610 /// is invoked to pop the information about the lambda. 3611 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3612 bool IsInstantiation = false); 3613 3614 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3615 /// was successfully completed. 3616 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3617 Scope *CurScope, 3618 llvm::Optional<unsigned> ManglingNumber 3619 = llvm::Optional<unsigned>(), 3620 Decl *ContextDecl = 0, 3621 bool IsInstantiation = false); 3622 3623 /// \brief Define the "body" of the conversion from a lambda object to a 3624 /// function pointer. 3625 /// 3626 /// This routine doesn't actually define a sensible body; rather, it fills 3627 /// in the initialization expression needed to copy the lambda object into 3628 /// the block, and IR generation actually generates the real body of the 3629 /// block pointer conversion. 3630 void DefineImplicitLambdaToFunctionPointerConversion( 3631 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3632 3633 /// \brief Define the "body" of the conversion from a lambda object to a 3634 /// block pointer. 3635 /// 3636 /// This routine doesn't actually define a sensible body; rather, it fills 3637 /// in the initialization expression needed to copy the lambda object into 3638 /// the block, and IR generation actually generates the real body of the 3639 /// block pointer conversion. 3640 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3641 CXXConversionDecl *Conv); 3642 3643 // ParseObjCStringLiteral - Parse Objective-C string literals. 3644 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3645 Expr **Strings, 3646 unsigned NumStrings); 3647 3648 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3649 TypeSourceInfo *EncodedTypeInfo, 3650 SourceLocation RParenLoc); 3651 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3652 CXXMethodDecl *Method, 3653 bool HadMultipleCandidates); 3654 3655 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3656 SourceLocation EncodeLoc, 3657 SourceLocation LParenLoc, 3658 ParsedType Ty, 3659 SourceLocation RParenLoc); 3660 3661 // ParseObjCSelectorExpression - Build selector expression for @selector 3662 ExprResult ParseObjCSelectorExpression(Selector Sel, 3663 SourceLocation AtLoc, 3664 SourceLocation SelLoc, 3665 SourceLocation LParenLoc, 3666 SourceLocation RParenLoc); 3667 3668 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3669 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3670 SourceLocation AtLoc, 3671 SourceLocation ProtoLoc, 3672 SourceLocation LParenLoc, 3673 SourceLocation RParenLoc); 3674 3675 //===--------------------------------------------------------------------===// 3676 // C++ Declarations 3677 // 3678 Decl *ActOnStartLinkageSpecification(Scope *S, 3679 SourceLocation ExternLoc, 3680 SourceLocation LangLoc, 3681 StringRef Lang, 3682 SourceLocation LBraceLoc); 3683 Decl *ActOnFinishLinkageSpecification(Scope *S, 3684 Decl *LinkageSpec, 3685 SourceLocation RBraceLoc); 3686 3687 3688 //===--------------------------------------------------------------------===// 3689 // C++ Classes 3690 // 3691 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3692 const CXXScopeSpec *SS = 0); 3693 3694 bool ActOnAccessSpecifier(AccessSpecifier Access, 3695 SourceLocation ASLoc, 3696 SourceLocation ColonLoc, 3697 AttributeList *Attrs = 0); 3698 3699 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3700 Declarator &D, 3701 MultiTemplateParamsArg TemplateParameterLists, 3702 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3703 bool HasDeferredInit); 3704 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3705 Expr *Init); 3706 3707 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3708 Scope *S, 3709 CXXScopeSpec &SS, 3710 IdentifierInfo *MemberOrBase, 3711 ParsedType TemplateTypeTy, 3712 const DeclSpec &DS, 3713 SourceLocation IdLoc, 3714 SourceLocation LParenLoc, 3715 Expr **Args, unsigned NumArgs, 3716 SourceLocation RParenLoc, 3717 SourceLocation EllipsisLoc); 3718 3719 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3720 Scope *S, 3721 CXXScopeSpec &SS, 3722 IdentifierInfo *MemberOrBase, 3723 ParsedType TemplateTypeTy, 3724 const DeclSpec &DS, 3725 SourceLocation IdLoc, 3726 Expr *InitList, 3727 SourceLocation EllipsisLoc); 3728 3729 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3730 Scope *S, 3731 CXXScopeSpec &SS, 3732 IdentifierInfo *MemberOrBase, 3733 ParsedType TemplateTypeTy, 3734 const DeclSpec &DS, 3735 SourceLocation IdLoc, 3736 Expr *Init, 3737 SourceLocation EllipsisLoc); 3738 3739 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3740 Expr *Init, 3741 SourceLocation IdLoc); 3742 3743 MemInitResult BuildBaseInitializer(QualType BaseType, 3744 TypeSourceInfo *BaseTInfo, 3745 Expr *Init, 3746 CXXRecordDecl *ClassDecl, 3747 SourceLocation EllipsisLoc); 3748 3749 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3750 Expr *Init, 3751 CXXRecordDecl *ClassDecl); 3752 3753 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3754 CXXCtorInitializer *Initializer); 3755 3756 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3757 CXXCtorInitializer **Initializers, 3758 unsigned NumInitializers, bool AnyErrors); 3759 3760 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3761 3762 3763 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3764 /// mark all the non-trivial destructors of its members and bases as 3765 /// referenced. 3766 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3767 CXXRecordDecl *Record); 3768 3769 /// \brief The list of classes whose vtables have been used within 3770 /// this translation unit, and the source locations at which the 3771 /// first use occurred. 3772 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3773 3774 /// \brief The list of vtables that are required but have not yet been 3775 /// materialized. 3776 SmallVector<VTableUse, 16> VTableUses; 3777 3778 /// \brief The set of classes whose vtables have been used within 3779 /// this translation unit, and a bit that will be true if the vtable is 3780 /// required to be emitted (otherwise, it should be emitted only if needed 3781 /// by code generation). 3782 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3783 3784 /// \brief Load any externally-stored vtable uses. 3785 void LoadExternalVTableUses(); 3786 3787 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3788 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3789 DynamicClassesType; 3790 3791 /// \brief A list of all of the dynamic classes in this translation 3792 /// unit. 3793 DynamicClassesType DynamicClasses; 3794 3795 /// \brief Note that the vtable for the given class was used at the 3796 /// given location. 3797 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3798 bool DefinitionRequired = false); 3799 3800 /// MarkVirtualMembersReferenced - Will mark all members of the given 3801 /// CXXRecordDecl referenced. 3802 void MarkVirtualMembersReferenced(SourceLocation Loc, 3803 const CXXRecordDecl *RD); 3804 3805 /// \brief Define all of the vtables that have been used in this 3806 /// translation unit and reference any virtual members used by those 3807 /// vtables. 3808 /// 3809 /// \returns true if any work was done, false otherwise. 3810 bool DefineUsedVTables(); 3811 3812 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3813 3814 void ActOnMemInitializers(Decl *ConstructorDecl, 3815 SourceLocation ColonLoc, 3816 CXXCtorInitializer **MemInits, 3817 unsigned NumMemInits, 3818 bool AnyErrors); 3819 3820 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3821 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3822 Decl *TagDecl, 3823 SourceLocation LBrac, 3824 SourceLocation RBrac, 3825 AttributeList *AttrList); 3826 3827 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3828 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3829 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3830 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3831 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3832 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3833 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3834 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3835 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3836 bool IsInsideALocalClassWithinATemplateFunction(); 3837 3838 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3839 Expr *AssertExpr, 3840 Expr *AssertMessageExpr, 3841 SourceLocation RParenLoc); 3842 3843 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3844 SourceLocation FriendLoc, 3845 TypeSourceInfo *TSInfo); 3846 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3847 MultiTemplateParamsArg TemplateParams); 3848 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3849 MultiTemplateParamsArg TemplateParams); 3850 3851 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3852 StorageClass& SC); 3853 void CheckConstructor(CXXConstructorDecl *Constructor); 3854 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3855 StorageClass& SC); 3856 bool CheckDestructor(CXXDestructorDecl *Destructor); 3857 void CheckConversionDeclarator(Declarator &D, QualType &R, 3858 StorageClass& SC); 3859 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3860 3861 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3862 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3863 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3864 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3865 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3866 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3867 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3868 3869 //===--------------------------------------------------------------------===// 3870 // C++ Derived Classes 3871 // 3872 3873 /// ActOnBaseSpecifier - Parsed a base specifier 3874 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3875 SourceRange SpecifierRange, 3876 bool Virtual, AccessSpecifier Access, 3877 TypeSourceInfo *TInfo, 3878 SourceLocation EllipsisLoc); 3879 3880 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3881 SourceRange SpecifierRange, 3882 bool Virtual, AccessSpecifier Access, 3883 ParsedType basetype, 3884 SourceLocation BaseLoc, 3885 SourceLocation EllipsisLoc); 3886 3887 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3888 unsigned NumBases); 3889 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3890 unsigned NumBases); 3891 3892 bool IsDerivedFrom(QualType Derived, QualType Base); 3893 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3894 3895 // FIXME: I don't like this name. 3896 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3897 3898 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3899 3900 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3901 SourceLocation Loc, SourceRange Range, 3902 CXXCastPath *BasePath = 0, 3903 bool IgnoreAccess = false); 3904 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3905 unsigned InaccessibleBaseID, 3906 unsigned AmbigiousBaseConvID, 3907 SourceLocation Loc, SourceRange Range, 3908 DeclarationName Name, 3909 CXXCastPath *BasePath); 3910 3911 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3912 3913 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3914 /// covariant, according to C++ [class.virtual]p5. 3915 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3916 const CXXMethodDecl *Old); 3917 3918 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3919 /// spec is a subset of base spec. 3920 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3921 const CXXMethodDecl *Old); 3922 3923 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3924 3925 /// CheckOverrideControl - Check C++0x override control semantics. 3926 void CheckOverrideControl(const Decl *D); 3927 3928 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3929 /// overrides a virtual member function marked 'final', according to 3930 /// C++0x [class.virtual]p3. 3931 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3932 const CXXMethodDecl *Old); 3933 3934 3935 //===--------------------------------------------------------------------===// 3936 // C++ Access Control 3937 // 3938 3939 enum AccessResult { 3940 AR_accessible, 3941 AR_inaccessible, 3942 AR_dependent, 3943 AR_delayed 3944 }; 3945 3946 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3947 NamedDecl *PrevMemberDecl, 3948 AccessSpecifier LexicalAS); 3949 3950 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3951 DeclAccessPair FoundDecl); 3952 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3953 DeclAccessPair FoundDecl); 3954 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3955 SourceRange PlacementRange, 3956 CXXRecordDecl *NamingClass, 3957 DeclAccessPair FoundDecl, 3958 bool Diagnose = true); 3959 AccessResult CheckConstructorAccess(SourceLocation Loc, 3960 CXXConstructorDecl *D, 3961 const InitializedEntity &Entity, 3962 AccessSpecifier Access, 3963 bool IsCopyBindingRefToTemp = false); 3964 AccessResult CheckConstructorAccess(SourceLocation Loc, 3965 CXXConstructorDecl *D, 3966 AccessSpecifier Access, 3967 PartialDiagnostic PD); 3968 AccessResult CheckDestructorAccess(SourceLocation Loc, 3969 CXXDestructorDecl *Dtor, 3970 const PartialDiagnostic &PDiag); 3971 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3972 NamedDecl *D, 3973 const PartialDiagnostic &PDiag); 3974 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3975 Expr *ObjectExpr, 3976 Expr *ArgExpr, 3977 DeclAccessPair FoundDecl); 3978 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3979 DeclAccessPair FoundDecl); 3980 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3981 QualType Base, QualType Derived, 3982 const CXXBasePath &Path, 3983 unsigned DiagID, 3984 bool ForceCheck = false, 3985 bool ForceUnprivileged = false); 3986 void CheckLookupAccess(const LookupResult &R); 3987 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3988 3989 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3990 const MultiLevelTemplateArgumentList &TemplateArgs); 3991 void PerformDependentDiagnostics(const DeclContext *Pattern, 3992 const MultiLevelTemplateArgumentList &TemplateArgs); 3993 3994 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3995 3996 /// A flag to suppress access checking. 3997 bool SuppressAccessChecking; 3998 3999 /// \brief When true, access checking violations are treated as SFINAE 4000 /// failures rather than hard errors. 4001 bool AccessCheckingSFINAE; 4002 4003 void ActOnStartSuppressingAccessChecks(); 4004 void ActOnStopSuppressingAccessChecks(); 4005 4006 enum AbstractDiagSelID { 4007 AbstractNone = -1, 4008 AbstractReturnType, 4009 AbstractParamType, 4010 AbstractVariableType, 4011 AbstractFieldType, 4012 AbstractArrayType 4013 }; 4014 4015 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4016 const PartialDiagnostic &PD); 4017 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4018 4019 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4020 AbstractDiagSelID SelID = AbstractNone); 4021 4022 //===--------------------------------------------------------------------===// 4023 // C++ Overloaded Operators [C++ 13.5] 4024 // 4025 4026 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4027 4028 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4029 4030 //===--------------------------------------------------------------------===// 4031 // C++ Templates [C++ 14] 4032 // 4033 void FilterAcceptableTemplateNames(LookupResult &R); 4034 bool hasAnyAcceptableTemplateNames(LookupResult &R); 4035 4036 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4037 QualType ObjectType, bool EnteringContext, 4038 bool &MemberOfUnknownSpecialization); 4039 4040 TemplateNameKind isTemplateName(Scope *S, 4041 CXXScopeSpec &SS, 4042 bool hasTemplateKeyword, 4043 UnqualifiedId &Name, 4044 ParsedType ObjectType, 4045 bool EnteringContext, 4046 TemplateTy &Template, 4047 bool &MemberOfUnknownSpecialization); 4048 4049 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4050 SourceLocation IILoc, 4051 Scope *S, 4052 const CXXScopeSpec *SS, 4053 TemplateTy &SuggestedTemplate, 4054 TemplateNameKind &SuggestedKind); 4055 4056 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4057 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4058 4059 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4060 SourceLocation EllipsisLoc, 4061 SourceLocation KeyLoc, 4062 IdentifierInfo *ParamName, 4063 SourceLocation ParamNameLoc, 4064 unsigned Depth, unsigned Position, 4065 SourceLocation EqualLoc, 4066 ParsedType DefaultArg); 4067 4068 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4069 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4070 unsigned Depth, 4071 unsigned Position, 4072 SourceLocation EqualLoc, 4073 Expr *DefaultArg); 4074 Decl *ActOnTemplateTemplateParameter(Scope *S, 4075 SourceLocation TmpLoc, 4076 TemplateParameterList *Params, 4077 SourceLocation EllipsisLoc, 4078 IdentifierInfo *ParamName, 4079 SourceLocation ParamNameLoc, 4080 unsigned Depth, 4081 unsigned Position, 4082 SourceLocation EqualLoc, 4083 ParsedTemplateArgument DefaultArg); 4084 4085 TemplateParameterList * 4086 ActOnTemplateParameterList(unsigned Depth, 4087 SourceLocation ExportLoc, 4088 SourceLocation TemplateLoc, 4089 SourceLocation LAngleLoc, 4090 Decl **Params, unsigned NumParams, 4091 SourceLocation RAngleLoc); 4092 4093 /// \brief The context in which we are checking a template parameter 4094 /// list. 4095 enum TemplateParamListContext { 4096 TPC_ClassTemplate, 4097 TPC_FunctionTemplate, 4098 TPC_ClassTemplateMember, 4099 TPC_FriendFunctionTemplate, 4100 TPC_FriendFunctionTemplateDefinition, 4101 TPC_TypeAliasTemplate 4102 }; 4103 4104 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4105 TemplateParameterList *OldParams, 4106 TemplateParamListContext TPC); 4107 TemplateParameterList * 4108 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4109 SourceLocation DeclLoc, 4110 const CXXScopeSpec &SS, 4111 TemplateParameterList **ParamLists, 4112 unsigned NumParamLists, 4113 bool IsFriend, 4114 bool &IsExplicitSpecialization, 4115 bool &Invalid); 4116 4117 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4118 SourceLocation KWLoc, CXXScopeSpec &SS, 4119 IdentifierInfo *Name, SourceLocation NameLoc, 4120 AttributeList *Attr, 4121 TemplateParameterList *TemplateParams, 4122 AccessSpecifier AS, 4123 SourceLocation ModulePrivateLoc, 4124 unsigned NumOuterTemplateParamLists, 4125 TemplateParameterList **OuterTemplateParamLists); 4126 4127 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4128 TemplateArgumentListInfo &Out); 4129 4130 void NoteAllFoundTemplates(TemplateName Name); 4131 4132 QualType CheckTemplateIdType(TemplateName Template, 4133 SourceLocation TemplateLoc, 4134 TemplateArgumentListInfo &TemplateArgs); 4135 4136 TypeResult 4137 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4138 TemplateTy Template, SourceLocation TemplateLoc, 4139 SourceLocation LAngleLoc, 4140 ASTTemplateArgsPtr TemplateArgs, 4141 SourceLocation RAngleLoc, 4142 bool IsCtorOrDtorName = false); 4143 4144 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4145 /// such as \c class T::template apply<U>. 4146 /// 4147 /// \param TUK 4148 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4149 TypeSpecifierType TagSpec, 4150 SourceLocation TagLoc, 4151 CXXScopeSpec &SS, 4152 SourceLocation TemplateKWLoc, 4153 TemplateTy TemplateD, 4154 SourceLocation TemplateLoc, 4155 SourceLocation LAngleLoc, 4156 ASTTemplateArgsPtr TemplateArgsIn, 4157 SourceLocation RAngleLoc); 4158 4159 4160 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4161 SourceLocation TemplateKWLoc, 4162 LookupResult &R, 4163 bool RequiresADL, 4164 const TemplateArgumentListInfo *TemplateArgs); 4165 4166 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4167 SourceLocation TemplateKWLoc, 4168 const DeclarationNameInfo &NameInfo, 4169 const TemplateArgumentListInfo *TemplateArgs); 4170 4171 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4172 CXXScopeSpec &SS, 4173 SourceLocation TemplateKWLoc, 4174 UnqualifiedId &Name, 4175 ParsedType ObjectType, 4176 bool EnteringContext, 4177 TemplateTy &Template); 4178 4179 DeclResult 4180 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4181 SourceLocation KWLoc, 4182 SourceLocation ModulePrivateLoc, 4183 CXXScopeSpec &SS, 4184 TemplateTy Template, 4185 SourceLocation TemplateNameLoc, 4186 SourceLocation LAngleLoc, 4187 ASTTemplateArgsPtr TemplateArgs, 4188 SourceLocation RAngleLoc, 4189 AttributeList *Attr, 4190 MultiTemplateParamsArg TemplateParameterLists); 4191 4192 Decl *ActOnTemplateDeclarator(Scope *S, 4193 MultiTemplateParamsArg TemplateParameterLists, 4194 Declarator &D); 4195 4196 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4197 MultiTemplateParamsArg TemplateParameterLists, 4198 Declarator &D); 4199 4200 bool 4201 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4202 TemplateSpecializationKind NewTSK, 4203 NamedDecl *PrevDecl, 4204 TemplateSpecializationKind PrevTSK, 4205 SourceLocation PrevPtOfInstantiation, 4206 bool &SuppressNew); 4207 4208 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4209 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4210 LookupResult &Previous); 4211 4212 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4213 TemplateArgumentListInfo *ExplicitTemplateArgs, 4214 LookupResult &Previous); 4215 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4216 4217 DeclResult 4218 ActOnExplicitInstantiation(Scope *S, 4219 SourceLocation ExternLoc, 4220 SourceLocation TemplateLoc, 4221 unsigned TagSpec, 4222 SourceLocation KWLoc, 4223 const CXXScopeSpec &SS, 4224 TemplateTy Template, 4225 SourceLocation TemplateNameLoc, 4226 SourceLocation LAngleLoc, 4227 ASTTemplateArgsPtr TemplateArgs, 4228 SourceLocation RAngleLoc, 4229 AttributeList *Attr); 4230 4231 DeclResult 4232 ActOnExplicitInstantiation(Scope *S, 4233 SourceLocation ExternLoc, 4234 SourceLocation TemplateLoc, 4235 unsigned TagSpec, 4236 SourceLocation KWLoc, 4237 CXXScopeSpec &SS, 4238 IdentifierInfo *Name, 4239 SourceLocation NameLoc, 4240 AttributeList *Attr); 4241 4242 DeclResult ActOnExplicitInstantiation(Scope *S, 4243 SourceLocation ExternLoc, 4244 SourceLocation TemplateLoc, 4245 Declarator &D); 4246 4247 TemplateArgumentLoc 4248 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4249 SourceLocation TemplateLoc, 4250 SourceLocation RAngleLoc, 4251 Decl *Param, 4252 SmallVectorImpl<TemplateArgument> &Converted); 4253 4254 /// \brief Specifies the context in which a particular template 4255 /// argument is being checked. 4256 enum CheckTemplateArgumentKind { 4257 /// \brief The template argument was specified in the code or was 4258 /// instantiated with some deduced template arguments. 4259 CTAK_Specified, 4260 4261 /// \brief The template argument was deduced via template argument 4262 /// deduction. 4263 CTAK_Deduced, 4264 4265 /// \brief The template argument was deduced from an array bound 4266 /// via template argument deduction. 4267 CTAK_DeducedFromArrayBound 4268 }; 4269 4270 bool CheckTemplateArgument(NamedDecl *Param, 4271 const TemplateArgumentLoc &Arg, 4272 NamedDecl *Template, 4273 SourceLocation TemplateLoc, 4274 SourceLocation RAngleLoc, 4275 unsigned ArgumentPackIndex, 4276 SmallVectorImpl<TemplateArgument> &Converted, 4277 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4278 4279 /// \brief Check that the given template arguments can be be provided to 4280 /// the given template, converting the arguments along the way. 4281 /// 4282 /// \param Template The template to which the template arguments are being 4283 /// provided. 4284 /// 4285 /// \param TemplateLoc The location of the template name in the source. 4286 /// 4287 /// \param TemplateArgs The list of template arguments. If the template is 4288 /// a template template parameter, this function may extend the set of 4289 /// template arguments to also include substituted, defaulted template 4290 /// arguments. 4291 /// 4292 /// \param PartialTemplateArgs True if the list of template arguments is 4293 /// intentionally partial, e.g., because we're checking just the initial 4294 /// set of template arguments. 4295 /// 4296 /// \param Converted Will receive the converted, canonicalized template 4297 /// arguments. 4298 /// 4299 /// 4300 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4301 /// when the template arguments contain a pack expansion that is being 4302 /// expanded into a fixed parameter list. 4303 /// 4304 /// \returns True if an error occurred, false otherwise. 4305 bool CheckTemplateArgumentList(TemplateDecl *Template, 4306 SourceLocation TemplateLoc, 4307 TemplateArgumentListInfo &TemplateArgs, 4308 bool PartialTemplateArgs, 4309 SmallVectorImpl<TemplateArgument> &Converted, 4310 bool *ExpansionIntoFixedList = 0); 4311 4312 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4313 const TemplateArgumentLoc &Arg, 4314 SmallVectorImpl<TemplateArgument> &Converted); 4315 4316 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4317 TypeSourceInfo *Arg); 4318 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4319 TemplateArgument &Converted); 4320 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4321 QualType InstantiatedParamType, Expr *Arg, 4322 TemplateArgument &Converted, 4323 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4324 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4325 const TemplateArgumentLoc &Arg); 4326 4327 ExprResult 4328 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4329 QualType ParamType, 4330 SourceLocation Loc); 4331 ExprResult 4332 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4333 SourceLocation Loc); 4334 4335 /// \brief Enumeration describing how template parameter lists are compared 4336 /// for equality. 4337 enum TemplateParameterListEqualKind { 4338 /// \brief We are matching the template parameter lists of two templates 4339 /// that might be redeclarations. 4340 /// 4341 /// \code 4342 /// template<typename T> struct X; 4343 /// template<typename T> struct X; 4344 /// \endcode 4345 TPL_TemplateMatch, 4346 4347 /// \brief We are matching the template parameter lists of two template 4348 /// template parameters as part of matching the template parameter lists 4349 /// of two templates that might be redeclarations. 4350 /// 4351 /// \code 4352 /// template<template<int I> class TT> struct X; 4353 /// template<template<int Value> class Other> struct X; 4354 /// \endcode 4355 TPL_TemplateTemplateParmMatch, 4356 4357 /// \brief We are matching the template parameter lists of a template 4358 /// template argument against the template parameter lists of a template 4359 /// template parameter. 4360 /// 4361 /// \code 4362 /// template<template<int Value> class Metafun> struct X; 4363 /// template<int Value> struct integer_c; 4364 /// X<integer_c> xic; 4365 /// \endcode 4366 TPL_TemplateTemplateArgumentMatch 4367 }; 4368 4369 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4370 TemplateParameterList *Old, 4371 bool Complain, 4372 TemplateParameterListEqualKind Kind, 4373 SourceLocation TemplateArgLoc 4374 = SourceLocation()); 4375 4376 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4377 4378 /// \brief Called when the parser has parsed a C++ typename 4379 /// specifier, e.g., "typename T::type". 4380 /// 4381 /// \param S The scope in which this typename type occurs. 4382 /// \param TypenameLoc the location of the 'typename' keyword 4383 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4384 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4385 /// \param IdLoc the location of the identifier. 4386 TypeResult 4387 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4388 const CXXScopeSpec &SS, const IdentifierInfo &II, 4389 SourceLocation IdLoc); 4390 4391 /// \brief Called when the parser has parsed a C++ typename 4392 /// specifier that ends in a template-id, e.g., 4393 /// "typename MetaFun::template apply<T1, T2>". 4394 /// 4395 /// \param S The scope in which this typename type occurs. 4396 /// \param TypenameLoc the location of the 'typename' keyword 4397 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4398 /// \param TemplateLoc the location of the 'template' keyword, if any. 4399 /// \param TemplateName The template name. 4400 /// \param TemplateNameLoc The location of the template name. 4401 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4402 /// \param TemplateArgs The template arguments. 4403 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4404 TypeResult 4405 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4406 const CXXScopeSpec &SS, 4407 SourceLocation TemplateLoc, 4408 TemplateTy Template, 4409 SourceLocation TemplateNameLoc, 4410 SourceLocation LAngleLoc, 4411 ASTTemplateArgsPtr TemplateArgs, 4412 SourceLocation RAngleLoc); 4413 4414 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4415 SourceLocation KeywordLoc, 4416 NestedNameSpecifierLoc QualifierLoc, 4417 const IdentifierInfo &II, 4418 SourceLocation IILoc); 4419 4420 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4421 SourceLocation Loc, 4422 DeclarationName Name); 4423 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4424 4425 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4426 bool RebuildTemplateParamsInCurrentInstantiation( 4427 TemplateParameterList *Params); 4428 4429 std::string 4430 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4431 const TemplateArgumentList &Args); 4432 4433 std::string 4434 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4435 const TemplateArgument *Args, 4436 unsigned NumArgs); 4437 4438 //===--------------------------------------------------------------------===// 4439 // C++ Variadic Templates (C++0x [temp.variadic]) 4440 //===--------------------------------------------------------------------===// 4441 4442 /// \brief The context in which an unexpanded parameter pack is 4443 /// being diagnosed. 4444 /// 4445 /// Note that the values of this enumeration line up with the first 4446 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4447 enum UnexpandedParameterPackContext { 4448 /// \brief An arbitrary expression. 4449 UPPC_Expression = 0, 4450 4451 /// \brief The base type of a class type. 4452 UPPC_BaseType, 4453 4454 /// \brief The type of an arbitrary declaration. 4455 UPPC_DeclarationType, 4456 4457 /// \brief The type of a data member. 4458 UPPC_DataMemberType, 4459 4460 /// \brief The size of a bit-field. 4461 UPPC_BitFieldWidth, 4462 4463 /// \brief The expression in a static assertion. 4464 UPPC_StaticAssertExpression, 4465 4466 /// \brief The fixed underlying type of an enumeration. 4467 UPPC_FixedUnderlyingType, 4468 4469 /// \brief The enumerator value. 4470 UPPC_EnumeratorValue, 4471 4472 /// \brief A using declaration. 4473 UPPC_UsingDeclaration, 4474 4475 /// \brief A friend declaration. 4476 UPPC_FriendDeclaration, 4477 4478 /// \brief A declaration qualifier. 4479 UPPC_DeclarationQualifier, 4480 4481 /// \brief An initializer. 4482 UPPC_Initializer, 4483 4484 /// \brief A default argument. 4485 UPPC_DefaultArgument, 4486 4487 /// \brief The type of a non-type template parameter. 4488 UPPC_NonTypeTemplateParameterType, 4489 4490 /// \brief The type of an exception. 4491 UPPC_ExceptionType, 4492 4493 /// \brief Partial specialization. 4494 UPPC_PartialSpecialization, 4495 4496 /// \brief Microsoft __if_exists. 4497 UPPC_IfExists, 4498 4499 /// \brief Microsoft __if_not_exists. 4500 UPPC_IfNotExists 4501}; 4502 4503 /// \brief Diagnose unexpanded parameter packs. 4504 /// 4505 /// \param Loc The location at which we should emit the diagnostic. 4506 /// 4507 /// \param UPPC The context in which we are diagnosing unexpanded 4508 /// parameter packs. 4509 /// 4510 /// \param Unexpanded the set of unexpanded parameter packs. 4511 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4512 UnexpandedParameterPackContext UPPC, 4513 ArrayRef<UnexpandedParameterPack> Unexpanded); 4514 4515 /// \brief If the given type contains an unexpanded parameter pack, 4516 /// diagnose the error. 4517 /// 4518 /// \param Loc The source location where a diagnostc should be emitted. 4519 /// 4520 /// \param T The type that is being checked for unexpanded parameter 4521 /// packs. 4522 /// 4523 /// \returns true if an error occurred, false otherwise. 4524 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4525 UnexpandedParameterPackContext UPPC); 4526 4527 /// \brief If the given expression contains an unexpanded parameter 4528 /// pack, diagnose the error. 4529 /// 4530 /// \param E The expression that is being checked for unexpanded 4531 /// parameter packs. 4532 /// 4533 /// \returns true if an error occurred, false otherwise. 4534 bool DiagnoseUnexpandedParameterPack(Expr *E, 4535 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4536 4537 /// \brief If the given nested-name-specifier contains an unexpanded 4538 /// parameter pack, diagnose the error. 4539 /// 4540 /// \param SS The nested-name-specifier that is being checked for 4541 /// unexpanded parameter packs. 4542 /// 4543 /// \returns true if an error occurred, false otherwise. 4544 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4545 UnexpandedParameterPackContext UPPC); 4546 4547 /// \brief If the given name contains an unexpanded parameter pack, 4548 /// diagnose the error. 4549 /// 4550 /// \param NameInfo The name (with source location information) that 4551 /// is being checked for unexpanded parameter packs. 4552 /// 4553 /// \returns true if an error occurred, false otherwise. 4554 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4555 UnexpandedParameterPackContext UPPC); 4556 4557 /// \brief If the given template name contains an unexpanded parameter pack, 4558 /// diagnose the error. 4559 /// 4560 /// \param Loc The location of the template name. 4561 /// 4562 /// \param Template The template name that is being checked for unexpanded 4563 /// parameter packs. 4564 /// 4565 /// \returns true if an error occurred, false otherwise. 4566 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4567 TemplateName Template, 4568 UnexpandedParameterPackContext UPPC); 4569 4570 /// \brief If the given template argument contains an unexpanded parameter 4571 /// pack, diagnose the error. 4572 /// 4573 /// \param Arg The template argument that is being checked for unexpanded 4574 /// parameter packs. 4575 /// 4576 /// \returns true if an error occurred, false otherwise. 4577 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4578 UnexpandedParameterPackContext UPPC); 4579 4580 /// \brief Collect the set of unexpanded parameter packs within the given 4581 /// template argument. 4582 /// 4583 /// \param Arg The template argument that will be traversed to find 4584 /// unexpanded parameter packs. 4585 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4586 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4587 4588 /// \brief Collect the set of unexpanded parameter packs within the given 4589 /// template argument. 4590 /// 4591 /// \param Arg The template argument that will be traversed to find 4592 /// unexpanded parameter packs. 4593 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4594 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4595 4596 /// \brief Collect the set of unexpanded parameter packs within the given 4597 /// type. 4598 /// 4599 /// \param T The type that will be traversed to find 4600 /// unexpanded parameter packs. 4601 void collectUnexpandedParameterPacks(QualType T, 4602 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4603 4604 /// \brief Collect the set of unexpanded parameter packs within the given 4605 /// type. 4606 /// 4607 /// \param TL The type that will be traversed to find 4608 /// unexpanded parameter packs. 4609 void collectUnexpandedParameterPacks(TypeLoc TL, 4610 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4611 4612 /// \brief Collect the set of unexpanded parameter packs within the given 4613 /// nested-name-specifier. 4614 /// 4615 /// \param SS The nested-name-specifier that will be traversed to find 4616 /// unexpanded parameter packs. 4617 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4618 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4619 4620 /// \brief Collect the set of unexpanded parameter packs within the given 4621 /// name. 4622 /// 4623 /// \param NameInfo The name that will be traversed to find 4624 /// unexpanded parameter packs. 4625 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4626 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4627 4628 /// \brief Invoked when parsing a template argument followed by an 4629 /// ellipsis, which creates a pack expansion. 4630 /// 4631 /// \param Arg The template argument preceding the ellipsis, which 4632 /// may already be invalid. 4633 /// 4634 /// \param EllipsisLoc The location of the ellipsis. 4635 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4636 SourceLocation EllipsisLoc); 4637 4638 /// \brief Invoked when parsing a type followed by an ellipsis, which 4639 /// creates a pack expansion. 4640 /// 4641 /// \param Type The type preceding the ellipsis, which will become 4642 /// the pattern of the pack expansion. 4643 /// 4644 /// \param EllipsisLoc The location of the ellipsis. 4645 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4646 4647 /// \brief Construct a pack expansion type from the pattern of the pack 4648 /// expansion. 4649 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4650 SourceLocation EllipsisLoc, 4651 llvm::Optional<unsigned> NumExpansions); 4652 4653 /// \brief Construct a pack expansion type from the pattern of the pack 4654 /// expansion. 4655 QualType CheckPackExpansion(QualType Pattern, 4656 SourceRange PatternRange, 4657 SourceLocation EllipsisLoc, 4658 llvm::Optional<unsigned> NumExpansions); 4659 4660 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4661 /// creates a pack expansion. 4662 /// 4663 /// \param Pattern The expression preceding the ellipsis, which will become 4664 /// the pattern of the pack expansion. 4665 /// 4666 /// \param EllipsisLoc The location of the ellipsis. 4667 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4668 4669 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4670 /// creates a pack expansion. 4671 /// 4672 /// \param Pattern The expression preceding the ellipsis, which will become 4673 /// the pattern of the pack expansion. 4674 /// 4675 /// \param EllipsisLoc The location of the ellipsis. 4676 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4677 llvm::Optional<unsigned> NumExpansions); 4678 4679 /// \brief Determine whether we could expand a pack expansion with the 4680 /// given set of parameter packs into separate arguments by repeatedly 4681 /// transforming the pattern. 4682 /// 4683 /// \param EllipsisLoc The location of the ellipsis that identifies the 4684 /// pack expansion. 4685 /// 4686 /// \param PatternRange The source range that covers the entire pattern of 4687 /// the pack expansion. 4688 /// 4689 /// \param Unexpanded The set of unexpanded parameter packs within the 4690 /// pattern. 4691 /// 4692 /// \param NumUnexpanded The number of unexpanded parameter packs in 4693 /// \p Unexpanded. 4694 /// 4695 /// \param ShouldExpand Will be set to \c true if the transformer should 4696 /// expand the corresponding pack expansions into separate arguments. When 4697 /// set, \c NumExpansions must also be set. 4698 /// 4699 /// \param RetainExpansion Whether the caller should add an unexpanded 4700 /// pack expansion after all of the expanded arguments. This is used 4701 /// when extending explicitly-specified template argument packs per 4702 /// C++0x [temp.arg.explicit]p9. 4703 /// 4704 /// \param NumExpansions The number of separate arguments that will be in 4705 /// the expanded form of the corresponding pack expansion. This is both an 4706 /// input and an output parameter, which can be set by the caller if the 4707 /// number of expansions is known a priori (e.g., due to a prior substitution) 4708 /// and will be set by the callee when the number of expansions is known. 4709 /// The callee must set this value when \c ShouldExpand is \c true; it may 4710 /// set this value in other cases. 4711 /// 4712 /// \returns true if an error occurred (e.g., because the parameter packs 4713 /// are to be instantiated with arguments of different lengths), false 4714 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4715 /// must be set. 4716 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4717 SourceRange PatternRange, 4718 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4719 const MultiLevelTemplateArgumentList &TemplateArgs, 4720 bool &ShouldExpand, 4721 bool &RetainExpansion, 4722 llvm::Optional<unsigned> &NumExpansions); 4723 4724 /// \brief Determine the number of arguments in the given pack expansion 4725 /// type. 4726 /// 4727 /// This routine already assumes that the pack expansion type can be 4728 /// expanded and that the number of arguments in the expansion is 4729 /// consistent across all of the unexpanded parameter packs in its pattern. 4730 unsigned getNumArgumentsInExpansion(QualType T, 4731 const MultiLevelTemplateArgumentList &TemplateArgs); 4732 4733 /// \brief Determine whether the given declarator contains any unexpanded 4734 /// parameter packs. 4735 /// 4736 /// This routine is used by the parser to disambiguate function declarators 4737 /// with an ellipsis prior to the ')', e.g., 4738 /// 4739 /// \code 4740 /// void f(T...); 4741 /// \endcode 4742 /// 4743 /// To determine whether we have an (unnamed) function parameter pack or 4744 /// a variadic function. 4745 /// 4746 /// \returns true if the declarator contains any unexpanded parameter packs, 4747 /// false otherwise. 4748 bool containsUnexpandedParameterPacks(Declarator &D); 4749 4750 //===--------------------------------------------------------------------===// 4751 // C++ Template Argument Deduction (C++ [temp.deduct]) 4752 //===--------------------------------------------------------------------===// 4753 4754 /// \brief Describes the result of template argument deduction. 4755 /// 4756 /// The TemplateDeductionResult enumeration describes the result of 4757 /// template argument deduction, as returned from 4758 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4759 /// structure provides additional information about the results of 4760 /// template argument deduction, e.g., the deduced template argument 4761 /// list (if successful) or the specific template parameters or 4762 /// deduced arguments that were involved in the failure. 4763 enum TemplateDeductionResult { 4764 /// \brief Template argument deduction was successful. 4765 TDK_Success = 0, 4766 /// \brief Template argument deduction exceeded the maximum template 4767 /// instantiation depth (which has already been diagnosed). 4768 TDK_InstantiationDepth, 4769 /// \brief Template argument deduction did not deduce a value 4770 /// for every template parameter. 4771 TDK_Incomplete, 4772 /// \brief Template argument deduction produced inconsistent 4773 /// deduced values for the given template parameter. 4774 TDK_Inconsistent, 4775 /// \brief Template argument deduction failed due to inconsistent 4776 /// cv-qualifiers on a template parameter type that would 4777 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4778 /// but were given a non-const "X". 4779 TDK_Underqualified, 4780 /// \brief Substitution of the deduced template argument values 4781 /// resulted in an error. 4782 TDK_SubstitutionFailure, 4783 /// \brief Substitution of the deduced template argument values 4784 /// into a non-deduced context produced a type or value that 4785 /// produces a type that does not match the original template 4786 /// arguments provided. 4787 TDK_NonDeducedMismatch, 4788 /// \brief When performing template argument deduction for a function 4789 /// template, there were too many call arguments. 4790 TDK_TooManyArguments, 4791 /// \brief When performing template argument deduction for a function 4792 /// template, there were too few call arguments. 4793 TDK_TooFewArguments, 4794 /// \brief The explicitly-specified template arguments were not valid 4795 /// template arguments for the given template. 4796 TDK_InvalidExplicitArguments, 4797 /// \brief The arguments included an overloaded function name that could 4798 /// not be resolved to a suitable function. 4799 TDK_FailedOverloadResolution 4800 }; 4801 4802 TemplateDeductionResult 4803 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4804 const TemplateArgumentList &TemplateArgs, 4805 sema::TemplateDeductionInfo &Info); 4806 4807 TemplateDeductionResult 4808 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4809 TemplateArgumentListInfo &ExplicitTemplateArgs, 4810 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4811 SmallVectorImpl<QualType> &ParamTypes, 4812 QualType *FunctionType, 4813 sema::TemplateDeductionInfo &Info); 4814 4815 /// brief A function argument from which we performed template argument 4816 // deduction for a call. 4817 struct OriginalCallArg { 4818 OriginalCallArg(QualType OriginalParamType, 4819 unsigned ArgIdx, 4820 QualType OriginalArgType) 4821 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4822 OriginalArgType(OriginalArgType) { } 4823 4824 QualType OriginalParamType; 4825 unsigned ArgIdx; 4826 QualType OriginalArgType; 4827 }; 4828 4829 TemplateDeductionResult 4830 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4831 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4832 unsigned NumExplicitlySpecified, 4833 FunctionDecl *&Specialization, 4834 sema::TemplateDeductionInfo &Info, 4835 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4836 4837 TemplateDeductionResult 4838 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4839 TemplateArgumentListInfo *ExplicitTemplateArgs, 4840 llvm::ArrayRef<Expr *> Args, 4841 FunctionDecl *&Specialization, 4842 sema::TemplateDeductionInfo &Info); 4843 4844 TemplateDeductionResult 4845 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4846 TemplateArgumentListInfo *ExplicitTemplateArgs, 4847 QualType ArgFunctionType, 4848 FunctionDecl *&Specialization, 4849 sema::TemplateDeductionInfo &Info); 4850 4851 TemplateDeductionResult 4852 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4853 QualType ToType, 4854 CXXConversionDecl *&Specialization, 4855 sema::TemplateDeductionInfo &Info); 4856 4857 TemplateDeductionResult 4858 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4859 TemplateArgumentListInfo *ExplicitTemplateArgs, 4860 FunctionDecl *&Specialization, 4861 sema::TemplateDeductionInfo &Info); 4862 4863 /// \brief Result type of DeduceAutoType. 4864 enum DeduceAutoResult { 4865 DAR_Succeeded, 4866 DAR_Failed, 4867 DAR_FailedAlreadyDiagnosed 4868 }; 4869 4870 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4871 TypeSourceInfo *&Result); 4872 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4873 4874 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4875 FunctionTemplateDecl *FT2, 4876 SourceLocation Loc, 4877 TemplatePartialOrderingContext TPOC, 4878 unsigned NumCallArguments); 4879 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4880 UnresolvedSetIterator SEnd, 4881 TemplatePartialOrderingContext TPOC, 4882 unsigned NumCallArguments, 4883 SourceLocation Loc, 4884 const PartialDiagnostic &NoneDiag, 4885 const PartialDiagnostic &AmbigDiag, 4886 const PartialDiagnostic &CandidateDiag, 4887 bool Complain = true, 4888 QualType TargetType = QualType()); 4889 4890 ClassTemplatePartialSpecializationDecl * 4891 getMoreSpecializedPartialSpecialization( 4892 ClassTemplatePartialSpecializationDecl *PS1, 4893 ClassTemplatePartialSpecializationDecl *PS2, 4894 SourceLocation Loc); 4895 4896 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4897 bool OnlyDeduced, 4898 unsigned Depth, 4899 llvm::SmallBitVector &Used); 4900 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4901 llvm::SmallBitVector &Deduced) { 4902 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4903 } 4904 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4905 FunctionTemplateDecl *FunctionTemplate, 4906 llvm::SmallBitVector &Deduced); 4907 4908 //===--------------------------------------------------------------------===// 4909 // C++ Template Instantiation 4910 // 4911 4912 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4913 const TemplateArgumentList *Innermost = 0, 4914 bool RelativeToPrimary = false, 4915 const FunctionDecl *Pattern = 0); 4916 4917 /// \brief A template instantiation that is currently in progress. 4918 struct ActiveTemplateInstantiation { 4919 /// \brief The kind of template instantiation we are performing 4920 enum InstantiationKind { 4921 /// We are instantiating a template declaration. The entity is 4922 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4923 TemplateInstantiation, 4924 4925 /// We are instantiating a default argument for a template 4926 /// parameter. The Entity is the template, and 4927 /// TemplateArgs/NumTemplateArguments provides the template 4928 /// arguments as specified. 4929 /// FIXME: Use a TemplateArgumentList 4930 DefaultTemplateArgumentInstantiation, 4931 4932 /// We are instantiating a default argument for a function. 4933 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4934 /// provides the template arguments as specified. 4935 DefaultFunctionArgumentInstantiation, 4936 4937 /// We are substituting explicit template arguments provided for 4938 /// a function template. The entity is a FunctionTemplateDecl. 4939 ExplicitTemplateArgumentSubstitution, 4940 4941 /// We are substituting template argument determined as part of 4942 /// template argument deduction for either a class template 4943 /// partial specialization or a function template. The 4944 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4945 /// a FunctionTemplateDecl. 4946 DeducedTemplateArgumentSubstitution, 4947 4948 /// We are substituting prior template arguments into a new 4949 /// template parameter. The template parameter itself is either a 4950 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4951 PriorTemplateArgumentSubstitution, 4952 4953 /// We are checking the validity of a default template argument that 4954 /// has been used when naming a template-id. 4955 DefaultTemplateArgumentChecking 4956 } Kind; 4957 4958 /// \brief The point of instantiation within the source code. 4959 SourceLocation PointOfInstantiation; 4960 4961 /// \brief The template (or partial specialization) in which we are 4962 /// performing the instantiation, for substitutions of prior template 4963 /// arguments. 4964 NamedDecl *Template; 4965 4966 /// \brief The entity that is being instantiated. 4967 uintptr_t Entity; 4968 4969 /// \brief The list of template arguments we are substituting, if they 4970 /// are not part of the entity. 4971 const TemplateArgument *TemplateArgs; 4972 4973 /// \brief The number of template arguments in TemplateArgs. 4974 unsigned NumTemplateArgs; 4975 4976 /// \brief The template deduction info object associated with the 4977 /// substitution or checking of explicit or deduced template arguments. 4978 sema::TemplateDeductionInfo *DeductionInfo; 4979 4980 /// \brief The source range that covers the construct that cause 4981 /// the instantiation, e.g., the template-id that causes a class 4982 /// template instantiation. 4983 SourceRange InstantiationRange; 4984 4985 ActiveTemplateInstantiation() 4986 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4987 NumTemplateArgs(0), DeductionInfo(0) {} 4988 4989 /// \brief Determines whether this template is an actual instantiation 4990 /// that should be counted toward the maximum instantiation depth. 4991 bool isInstantiationRecord() const; 4992 4993 friend bool operator==(const ActiveTemplateInstantiation &X, 4994 const ActiveTemplateInstantiation &Y) { 4995 if (X.Kind != Y.Kind) 4996 return false; 4997 4998 if (X.Entity != Y.Entity) 4999 return false; 5000 5001 switch (X.Kind) { 5002 case TemplateInstantiation: 5003 return true; 5004 5005 case PriorTemplateArgumentSubstitution: 5006 case DefaultTemplateArgumentChecking: 5007 if (X.Template != Y.Template) 5008 return false; 5009 5010 // Fall through 5011 5012 case DefaultTemplateArgumentInstantiation: 5013 case ExplicitTemplateArgumentSubstitution: 5014 case DeducedTemplateArgumentSubstitution: 5015 case DefaultFunctionArgumentInstantiation: 5016 return X.TemplateArgs == Y.TemplateArgs; 5017 5018 } 5019 5020 llvm_unreachable("Invalid InstantiationKind!"); 5021 } 5022 5023 friend bool operator!=(const ActiveTemplateInstantiation &X, 5024 const ActiveTemplateInstantiation &Y) { 5025 return !(X == Y); 5026 } 5027 }; 5028 5029 /// \brief List of active template instantiations. 5030 /// 5031 /// This vector is treated as a stack. As one template instantiation 5032 /// requires another template instantiation, additional 5033 /// instantiations are pushed onto the stack up to a 5034 /// user-configurable limit LangOptions::InstantiationDepth. 5035 SmallVector<ActiveTemplateInstantiation, 16> 5036 ActiveTemplateInstantiations; 5037 5038 /// \brief Whether we are in a SFINAE context that is not associated with 5039 /// template instantiation. 5040 /// 5041 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5042 /// of a template instantiation or template argument deduction. 5043 bool InNonInstantiationSFINAEContext; 5044 5045 /// \brief The number of ActiveTemplateInstantiation entries in 5046 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5047 /// therefore, should not be counted as part of the instantiation depth. 5048 unsigned NonInstantiationEntries; 5049 5050 /// \brief The last template from which a template instantiation 5051 /// error or warning was produced. 5052 /// 5053 /// This value is used to suppress printing of redundant template 5054 /// instantiation backtraces when there are multiple errors in the 5055 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5056 /// to implement it anywhere else. 5057 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5058 5059 /// \brief The current index into pack expansion arguments that will be 5060 /// used for substitution of parameter packs. 5061 /// 5062 /// The pack expansion index will be -1 to indicate that parameter packs 5063 /// should be instantiated as themselves. Otherwise, the index specifies 5064 /// which argument within the parameter pack will be used for substitution. 5065 int ArgumentPackSubstitutionIndex; 5066 5067 /// \brief RAII object used to change the argument pack substitution index 5068 /// within a \c Sema object. 5069 /// 5070 /// See \c ArgumentPackSubstitutionIndex for more information. 5071 class ArgumentPackSubstitutionIndexRAII { 5072 Sema &Self; 5073 int OldSubstitutionIndex; 5074 5075 public: 5076 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5077 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5078 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5079 } 5080 5081 ~ArgumentPackSubstitutionIndexRAII() { 5082 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5083 } 5084 }; 5085 5086 friend class ArgumentPackSubstitutionRAII; 5087 5088 /// \brief The stack of calls expression undergoing template instantiation. 5089 /// 5090 /// The top of this stack is used by a fixit instantiating unresolved 5091 /// function calls to fix the AST to match the textual change it prints. 5092 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5093 5094 /// \brief For each declaration that involved template argument deduction, the 5095 /// set of diagnostics that were suppressed during that template argument 5096 /// deduction. 5097 /// 5098 /// FIXME: Serialize this structure to the AST file. 5099 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5100 SuppressedDiagnostics; 5101 5102 /// \brief A stack object to be created when performing template 5103 /// instantiation. 5104 /// 5105 /// Construction of an object of type \c InstantiatingTemplate 5106 /// pushes the current instantiation onto the stack of active 5107 /// instantiations. If the size of this stack exceeds the maximum 5108 /// number of recursive template instantiations, construction 5109 /// produces an error and evaluates true. 5110 /// 5111 /// Destruction of this object will pop the named instantiation off 5112 /// the stack. 5113 struct InstantiatingTemplate { 5114 /// \brief Note that we are instantiating a class template, 5115 /// function template, or a member thereof. 5116 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5117 Decl *Entity, 5118 SourceRange InstantiationRange = SourceRange()); 5119 5120 /// \brief Note that we are instantiating a default argument in a 5121 /// template-id. 5122 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5123 TemplateDecl *Template, 5124 const TemplateArgument *TemplateArgs, 5125 unsigned NumTemplateArgs, 5126 SourceRange InstantiationRange = SourceRange()); 5127 5128 /// \brief Note that we are instantiating a default argument in a 5129 /// template-id. 5130 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5131 FunctionTemplateDecl *FunctionTemplate, 5132 const TemplateArgument *TemplateArgs, 5133 unsigned NumTemplateArgs, 5134 ActiveTemplateInstantiation::InstantiationKind Kind, 5135 sema::TemplateDeductionInfo &DeductionInfo, 5136 SourceRange InstantiationRange = SourceRange()); 5137 5138 /// \brief Note that we are instantiating as part of template 5139 /// argument deduction for a class template partial 5140 /// specialization. 5141 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5142 ClassTemplatePartialSpecializationDecl *PartialSpec, 5143 const TemplateArgument *TemplateArgs, 5144 unsigned NumTemplateArgs, 5145 sema::TemplateDeductionInfo &DeductionInfo, 5146 SourceRange InstantiationRange = SourceRange()); 5147 5148 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5149 ParmVarDecl *Param, 5150 const TemplateArgument *TemplateArgs, 5151 unsigned NumTemplateArgs, 5152 SourceRange InstantiationRange = SourceRange()); 5153 5154 /// \brief Note that we are substituting prior template arguments into a 5155 /// non-type or template template parameter. 5156 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5157 NamedDecl *Template, 5158 NonTypeTemplateParmDecl *Param, 5159 const TemplateArgument *TemplateArgs, 5160 unsigned NumTemplateArgs, 5161 SourceRange InstantiationRange); 5162 5163 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5164 NamedDecl *Template, 5165 TemplateTemplateParmDecl *Param, 5166 const TemplateArgument *TemplateArgs, 5167 unsigned NumTemplateArgs, 5168 SourceRange InstantiationRange); 5169 5170 /// \brief Note that we are checking the default template argument 5171 /// against the template parameter for a given template-id. 5172 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5173 TemplateDecl *Template, 5174 NamedDecl *Param, 5175 const TemplateArgument *TemplateArgs, 5176 unsigned NumTemplateArgs, 5177 SourceRange InstantiationRange); 5178 5179 5180 /// \brief Note that we have finished instantiating this template. 5181 void Clear(); 5182 5183 ~InstantiatingTemplate() { Clear(); } 5184 5185 /// \brief Determines whether we have exceeded the maximum 5186 /// recursive template instantiations. 5187 operator bool() const { return Invalid; } 5188 5189 private: 5190 Sema &SemaRef; 5191 bool Invalid; 5192 bool SavedInNonInstantiationSFINAEContext; 5193 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5194 SourceRange InstantiationRange); 5195 5196 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5197 5198 InstantiatingTemplate& 5199 operator=(const InstantiatingTemplate&); // not implemented 5200 }; 5201 5202 void PrintInstantiationStack(); 5203 5204 /// \brief Determines whether we are currently in a context where 5205 /// template argument substitution failures are not considered 5206 /// errors. 5207 /// 5208 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5209 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5210 /// template-deduction context object, which can be used to capture 5211 /// diagnostics that will be suppressed. 5212 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5213 5214 /// \brief RAII class used to determine whether SFINAE has 5215 /// trapped any errors that occur during template argument 5216 /// deduction.` 5217 class SFINAETrap { 5218 Sema &SemaRef; 5219 unsigned PrevSFINAEErrors; 5220 bool PrevInNonInstantiationSFINAEContext; 5221 bool PrevAccessCheckingSFINAE; 5222 5223 public: 5224 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5225 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5226 PrevInNonInstantiationSFINAEContext( 5227 SemaRef.InNonInstantiationSFINAEContext), 5228 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5229 { 5230 if (!SemaRef.isSFINAEContext()) 5231 SemaRef.InNonInstantiationSFINAEContext = true; 5232 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5233 } 5234 5235 ~SFINAETrap() { 5236 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5237 SemaRef.InNonInstantiationSFINAEContext 5238 = PrevInNonInstantiationSFINAEContext; 5239 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5240 } 5241 5242 /// \brief Determine whether any SFINAE errors have been trapped. 5243 bool hasErrorOccurred() const { 5244 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5245 } 5246 }; 5247 5248 /// \brief The current instantiation scope used to store local 5249 /// variables. 5250 LocalInstantiationScope *CurrentInstantiationScope; 5251 5252 /// \brief The number of typos corrected by CorrectTypo. 5253 unsigned TyposCorrected; 5254 5255 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5256 UnqualifiedTyposCorrectedMap; 5257 5258 /// \brief A cache containing the results of typo correction for unqualified 5259 /// name lookup. 5260 /// 5261 /// The string is the string that we corrected to (which may be empty, if 5262 /// there was no correction), while the boolean will be true when the 5263 /// string represents a keyword. 5264 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5265 5266 /// \brief Worker object for performing CFG-based warnings. 5267 sema::AnalysisBasedWarnings AnalysisWarnings; 5268 5269 /// \brief An entity for which implicit template instantiation is required. 5270 /// 5271 /// The source location associated with the declaration is the first place in 5272 /// the source code where the declaration was "used". It is not necessarily 5273 /// the point of instantiation (which will be either before or after the 5274 /// namespace-scope declaration that triggered this implicit instantiation), 5275 /// However, it is the location that diagnostics should generally refer to, 5276 /// because users will need to know what code triggered the instantiation. 5277 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5278 5279 /// \brief The queue of implicit template instantiations that are required 5280 /// but have not yet been performed. 5281 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5282 5283 /// \brief The queue of implicit template instantiations that are required 5284 /// and must be performed within the current local scope. 5285 /// 5286 /// This queue is only used for member functions of local classes in 5287 /// templates, which must be instantiated in the same scope as their 5288 /// enclosing function, so that they can reference function-local 5289 /// types, static variables, enumerators, etc. 5290 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5291 5292 void PerformPendingInstantiations(bool LocalOnly = false); 5293 5294 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5295 const MultiLevelTemplateArgumentList &TemplateArgs, 5296 SourceLocation Loc, DeclarationName Entity); 5297 5298 QualType SubstType(QualType T, 5299 const MultiLevelTemplateArgumentList &TemplateArgs, 5300 SourceLocation Loc, DeclarationName Entity); 5301 5302 TypeSourceInfo *SubstType(TypeLoc TL, 5303 const MultiLevelTemplateArgumentList &TemplateArgs, 5304 SourceLocation Loc, DeclarationName Entity); 5305 5306 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5307 const MultiLevelTemplateArgumentList &TemplateArgs, 5308 SourceLocation Loc, 5309 DeclarationName Entity); 5310 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5311 const MultiLevelTemplateArgumentList &TemplateArgs, 5312 int indexAdjustment, 5313 llvm::Optional<unsigned> NumExpansions, 5314 bool ExpectParameterPack); 5315 bool SubstParmTypes(SourceLocation Loc, 5316 ParmVarDecl **Params, unsigned NumParams, 5317 const MultiLevelTemplateArgumentList &TemplateArgs, 5318 SmallVectorImpl<QualType> &ParamTypes, 5319 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5320 ExprResult SubstExpr(Expr *E, 5321 const MultiLevelTemplateArgumentList &TemplateArgs); 5322 5323 /// \brief Substitute the given template arguments into a list of 5324 /// expressions, expanding pack expansions if required. 5325 /// 5326 /// \param Exprs The list of expressions to substitute into. 5327 /// 5328 /// \param NumExprs The number of expressions in \p Exprs. 5329 /// 5330 /// \param IsCall Whether this is some form of call, in which case 5331 /// default arguments will be dropped. 5332 /// 5333 /// \param TemplateArgs The set of template arguments to substitute. 5334 /// 5335 /// \param Outputs Will receive all of the substituted arguments. 5336 /// 5337 /// \returns true if an error occurred, false otherwise. 5338 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5339 const MultiLevelTemplateArgumentList &TemplateArgs, 5340 SmallVectorImpl<Expr *> &Outputs); 5341 5342 StmtResult SubstStmt(Stmt *S, 5343 const MultiLevelTemplateArgumentList &TemplateArgs); 5344 5345 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5346 const MultiLevelTemplateArgumentList &TemplateArgs); 5347 5348 ExprResult SubstInitializer(Expr *E, 5349 const MultiLevelTemplateArgumentList &TemplateArgs, 5350 bool CXXDirectInit); 5351 5352 bool 5353 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5354 CXXRecordDecl *Pattern, 5355 const MultiLevelTemplateArgumentList &TemplateArgs); 5356 5357 bool 5358 InstantiateClass(SourceLocation PointOfInstantiation, 5359 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5360 const MultiLevelTemplateArgumentList &TemplateArgs, 5361 TemplateSpecializationKind TSK, 5362 bool Complain = true); 5363 5364 struct LateInstantiatedAttribute { 5365 const Attr *TmplAttr; 5366 LocalInstantiationScope *Scope; 5367 Decl *NewDecl; 5368 5369 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5370 Decl *D) 5371 : TmplAttr(A), Scope(S), NewDecl(D) 5372 { } 5373 }; 5374 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5375 5376 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5377 const Decl *Pattern, Decl *Inst, 5378 LateInstantiatedAttrVec *LateAttrs = 0, 5379 LocalInstantiationScope *OuterMostScope = 0); 5380 5381 bool 5382 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5383 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5384 TemplateSpecializationKind TSK, 5385 bool Complain = true); 5386 5387 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5388 CXXRecordDecl *Instantiation, 5389 const MultiLevelTemplateArgumentList &TemplateArgs, 5390 TemplateSpecializationKind TSK); 5391 5392 void InstantiateClassTemplateSpecializationMembers( 5393 SourceLocation PointOfInstantiation, 5394 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5395 TemplateSpecializationKind TSK); 5396 5397 NestedNameSpecifierLoc 5398 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5399 const MultiLevelTemplateArgumentList &TemplateArgs); 5400 5401 DeclarationNameInfo 5402 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5403 const MultiLevelTemplateArgumentList &TemplateArgs); 5404 TemplateName 5405 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5406 SourceLocation Loc, 5407 const MultiLevelTemplateArgumentList &TemplateArgs); 5408 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5409 TemplateArgumentListInfo &Result, 5410 const MultiLevelTemplateArgumentList &TemplateArgs); 5411 5412 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5413 FunctionDecl *Function, 5414 bool Recursive = false, 5415 bool DefinitionRequired = false); 5416 void InstantiateStaticDataMemberDefinition( 5417 SourceLocation PointOfInstantiation, 5418 VarDecl *Var, 5419 bool Recursive = false, 5420 bool DefinitionRequired = false); 5421 5422 void InstantiateMemInitializers(CXXConstructorDecl *New, 5423 const CXXConstructorDecl *Tmpl, 5424 const MultiLevelTemplateArgumentList &TemplateArgs); 5425 5426 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5427 const MultiLevelTemplateArgumentList &TemplateArgs); 5428 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5429 const MultiLevelTemplateArgumentList &TemplateArgs); 5430 5431 // Objective-C declarations. 5432 enum ObjCContainerKind { 5433 OCK_None = -1, 5434 OCK_Interface = 0, 5435 OCK_Protocol, 5436 OCK_Category, 5437 OCK_ClassExtension, 5438 OCK_Implementation, 5439 OCK_CategoryImplementation 5440 }; 5441 ObjCContainerKind getObjCContainerKind() const; 5442 5443 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5444 IdentifierInfo *ClassName, 5445 SourceLocation ClassLoc, 5446 IdentifierInfo *SuperName, 5447 SourceLocation SuperLoc, 5448 Decl * const *ProtoRefs, 5449 unsigned NumProtoRefs, 5450 const SourceLocation *ProtoLocs, 5451 SourceLocation EndProtoLoc, 5452 AttributeList *AttrList); 5453 5454 Decl *ActOnCompatiblityAlias( 5455 SourceLocation AtCompatibilityAliasLoc, 5456 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5457 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5458 5459 bool CheckForwardProtocolDeclarationForCircularDependency( 5460 IdentifierInfo *PName, 5461 SourceLocation &PLoc, SourceLocation PrevLoc, 5462 const ObjCList<ObjCProtocolDecl> &PList); 5463 5464 Decl *ActOnStartProtocolInterface( 5465 SourceLocation AtProtoInterfaceLoc, 5466 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5467 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5468 const SourceLocation *ProtoLocs, 5469 SourceLocation EndProtoLoc, 5470 AttributeList *AttrList); 5471 5472 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5473 IdentifierInfo *ClassName, 5474 SourceLocation ClassLoc, 5475 IdentifierInfo *CategoryName, 5476 SourceLocation CategoryLoc, 5477 Decl * const *ProtoRefs, 5478 unsigned NumProtoRefs, 5479 const SourceLocation *ProtoLocs, 5480 SourceLocation EndProtoLoc); 5481 5482 Decl *ActOnStartClassImplementation( 5483 SourceLocation AtClassImplLoc, 5484 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5485 IdentifierInfo *SuperClassname, 5486 SourceLocation SuperClassLoc); 5487 5488 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5489 IdentifierInfo *ClassName, 5490 SourceLocation ClassLoc, 5491 IdentifierInfo *CatName, 5492 SourceLocation CatLoc); 5493 5494 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5495 ArrayRef<Decl *> Decls); 5496 5497 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5498 IdentifierInfo **IdentList, 5499 SourceLocation *IdentLocs, 5500 unsigned NumElts); 5501 5502 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5503 const IdentifierLocPair *IdentList, 5504 unsigned NumElts, 5505 AttributeList *attrList); 5506 5507 void FindProtocolDeclaration(bool WarnOnDeclarations, 5508 const IdentifierLocPair *ProtocolId, 5509 unsigned NumProtocols, 5510 SmallVectorImpl<Decl *> &Protocols); 5511 5512 /// Ensure attributes are consistent with type. 5513 /// \param [in, out] Attributes The attributes to check; they will 5514 /// be modified to be consistent with \arg PropertyTy. 5515 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5516 SourceLocation Loc, 5517 unsigned &Attributes); 5518 5519 /// Process the specified property declaration and create decls for the 5520 /// setters and getters as needed. 5521 /// \param property The property declaration being processed 5522 /// \param DC The semantic container for the property 5523 /// \param redeclaredProperty Declaration for property if redeclared 5524 /// in class extension. 5525 /// \param lexicalDC Container for redeclaredProperty. 5526 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5527 ObjCContainerDecl *DC, 5528 ObjCPropertyDecl *redeclaredProperty = 0, 5529 ObjCContainerDecl *lexicalDC = 0); 5530 5531 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5532 ObjCPropertyDecl *SuperProperty, 5533 const IdentifierInfo *Name); 5534 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5535 5536 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5537 ObjCMethodDecl *MethodDecl, 5538 bool IsInstance); 5539 5540 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5541 5542 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5543 ObjCInterfaceDecl *ID); 5544 5545 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5546 ObjCProtocolDecl *PDecl); 5547 5548 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5549 Decl **allMethods = 0, unsigned allNum = 0, 5550 Decl **allProperties = 0, unsigned pNum = 0, 5551 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5552 5553 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5554 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5555 Selector GetterSel, Selector SetterSel, 5556 bool *OverridingProperty, 5557 tok::ObjCKeywordKind MethodImplKind, 5558 DeclContext *lexicalDC = 0); 5559 5560 Decl *ActOnPropertyImplDecl(Scope *S, 5561 SourceLocation AtLoc, 5562 SourceLocation PropertyLoc, 5563 bool ImplKind, 5564 IdentifierInfo *PropertyId, 5565 IdentifierInfo *PropertyIvar, 5566 SourceLocation PropertyIvarLoc); 5567 5568 enum ObjCSpecialMethodKind { 5569 OSMK_None, 5570 OSMK_Alloc, 5571 OSMK_New, 5572 OSMK_Copy, 5573 OSMK_RetainingInit, 5574 OSMK_NonRetainingInit 5575 }; 5576 5577 struct ObjCArgInfo { 5578 IdentifierInfo *Name; 5579 SourceLocation NameLoc; 5580 // The Type is null if no type was specified, and the DeclSpec is invalid 5581 // in this case. 5582 ParsedType Type; 5583 ObjCDeclSpec DeclSpec; 5584 5585 /// ArgAttrs - Attribute list for this argument. 5586 AttributeList *ArgAttrs; 5587 }; 5588 5589 Decl *ActOnMethodDeclaration( 5590 Scope *S, 5591 SourceLocation BeginLoc, // location of the + or -. 5592 SourceLocation EndLoc, // location of the ; or {. 5593 tok::TokenKind MethodType, 5594 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5595 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5596 // optional arguments. The number of types/arguments is obtained 5597 // from the Sel.getNumArgs(). 5598 ObjCArgInfo *ArgInfo, 5599 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5600 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5601 bool isVariadic, bool MethodDefinition); 5602 5603 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5604 // Will search "local" class/category implementations for a method decl. 5605 // Will also search in class's root looking for instance method. 5606 // Returns 0 if no method is found. 5607 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5608 ObjCInterfaceDecl *CDecl); 5609 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5610 ObjCInterfaceDecl *ClassDecl); 5611 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5612 const ObjCObjectPointerType *OPT, 5613 bool IsInstance); 5614 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5615 bool IsInstance); 5616 5617 bool inferObjCARCLifetime(ValueDecl *decl); 5618 5619 ExprResult 5620 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5621 Expr *BaseExpr, 5622 SourceLocation OpLoc, 5623 DeclarationName MemberName, 5624 SourceLocation MemberLoc, 5625 SourceLocation SuperLoc, QualType SuperType, 5626 bool Super); 5627 5628 ExprResult 5629 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5630 IdentifierInfo &propertyName, 5631 SourceLocation receiverNameLoc, 5632 SourceLocation propertyNameLoc); 5633 5634 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5635 5636 /// \brief Describes the kind of message expression indicated by a message 5637 /// send that starts with an identifier. 5638 enum ObjCMessageKind { 5639 /// \brief The message is sent to 'super'. 5640 ObjCSuperMessage, 5641 /// \brief The message is an instance message. 5642 ObjCInstanceMessage, 5643 /// \brief The message is a class message, and the identifier is a type 5644 /// name. 5645 ObjCClassMessage 5646 }; 5647 5648 ObjCMessageKind getObjCMessageKind(Scope *S, 5649 IdentifierInfo *Name, 5650 SourceLocation NameLoc, 5651 bool IsSuper, 5652 bool HasTrailingDot, 5653 ParsedType &ReceiverType); 5654 5655 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5656 Selector Sel, 5657 SourceLocation LBracLoc, 5658 ArrayRef<SourceLocation> SelectorLocs, 5659 SourceLocation RBracLoc, 5660 MultiExprArg Args); 5661 5662 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5663 QualType ReceiverType, 5664 SourceLocation SuperLoc, 5665 Selector Sel, 5666 ObjCMethodDecl *Method, 5667 SourceLocation LBracLoc, 5668 ArrayRef<SourceLocation> SelectorLocs, 5669 SourceLocation RBracLoc, 5670 MultiExprArg Args, 5671 bool isImplicit = false); 5672 5673 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5674 bool isSuperReceiver, 5675 SourceLocation Loc, 5676 Selector Sel, 5677 ObjCMethodDecl *Method, 5678 MultiExprArg Args); 5679 5680 ExprResult ActOnClassMessage(Scope *S, 5681 ParsedType Receiver, 5682 Selector Sel, 5683 SourceLocation LBracLoc, 5684 ArrayRef<SourceLocation> SelectorLocs, 5685 SourceLocation RBracLoc, 5686 MultiExprArg Args); 5687 5688 ExprResult BuildInstanceMessage(Expr *Receiver, 5689 QualType ReceiverType, 5690 SourceLocation SuperLoc, 5691 Selector Sel, 5692 ObjCMethodDecl *Method, 5693 SourceLocation LBracLoc, 5694 ArrayRef<SourceLocation> SelectorLocs, 5695 SourceLocation RBracLoc, 5696 MultiExprArg Args, 5697 bool isImplicit = false); 5698 5699 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5700 QualType ReceiverType, 5701 SourceLocation Loc, 5702 Selector Sel, 5703 ObjCMethodDecl *Method, 5704 MultiExprArg Args); 5705 5706 ExprResult ActOnInstanceMessage(Scope *S, 5707 Expr *Receiver, 5708 Selector Sel, 5709 SourceLocation LBracLoc, 5710 ArrayRef<SourceLocation> SelectorLocs, 5711 SourceLocation RBracLoc, 5712 MultiExprArg Args); 5713 5714 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5715 ObjCBridgeCastKind Kind, 5716 SourceLocation BridgeKeywordLoc, 5717 TypeSourceInfo *TSInfo, 5718 Expr *SubExpr); 5719 5720 ExprResult ActOnObjCBridgedCast(Scope *S, 5721 SourceLocation LParenLoc, 5722 ObjCBridgeCastKind Kind, 5723 SourceLocation BridgeKeywordLoc, 5724 ParsedType Type, 5725 SourceLocation RParenLoc, 5726 Expr *SubExpr); 5727 5728 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5729 5730 /// \brief Check whether the given new method is a valid override of the 5731 /// given overridden method, and set any properties that should be inherited. 5732 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5733 const ObjCMethodDecl *Overridden, 5734 bool IsImplementation); 5735 5736 /// \brief Check whether the given method overrides any methods in its class, 5737 /// calling \c CheckObjCMethodOverride for each overridden method. 5738 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5739 5740 enum PragmaOptionsAlignKind { 5741 POAK_Native, // #pragma options align=native 5742 POAK_Natural, // #pragma options align=natural 5743 POAK_Packed, // #pragma options align=packed 5744 POAK_Power, // #pragma options align=power 5745 POAK_Mac68k, // #pragma options align=mac68k 5746 POAK_Reset // #pragma options align=reset 5747 }; 5748 5749 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5750 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5751 SourceLocation PragmaLoc, 5752 SourceLocation KindLoc); 5753 5754 enum PragmaPackKind { 5755 PPK_Default, // #pragma pack([n]) 5756 PPK_Show, // #pragma pack(show), only supported by MSVC. 5757 PPK_Push, // #pragma pack(push, [identifier], [n]) 5758 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5759 }; 5760 5761 enum PragmaMSStructKind { 5762 PMSST_OFF, // #pragms ms_struct off 5763 PMSST_ON // #pragms ms_struct on 5764 }; 5765 5766 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5767 void ActOnPragmaPack(PragmaPackKind Kind, 5768 IdentifierInfo *Name, 5769 Expr *Alignment, 5770 SourceLocation PragmaLoc, 5771 SourceLocation LParenLoc, 5772 SourceLocation RParenLoc); 5773 5774 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5775 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5776 5777 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5778 void ActOnPragmaUnused(const Token &Identifier, 5779 Scope *curScope, 5780 SourceLocation PragmaLoc); 5781 5782 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5783 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5784 SourceLocation PragmaLoc); 5785 5786 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5787 SourceLocation Loc); 5788 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5789 5790 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5791 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5792 SourceLocation PragmaLoc, 5793 SourceLocation WeakNameLoc); 5794 5795 /// ActOnPragmaRedefineExtname - Called on well formed 5796 /// #pragma redefine_extname oldname newname. 5797 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 5798 IdentifierInfo* AliasName, 5799 SourceLocation PragmaLoc, 5800 SourceLocation WeakNameLoc, 5801 SourceLocation AliasNameLoc); 5802 5803 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5804 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5805 IdentifierInfo* AliasName, 5806 SourceLocation PragmaLoc, 5807 SourceLocation WeakNameLoc, 5808 SourceLocation AliasNameLoc); 5809 5810 /// ActOnPragmaFPContract - Called on well formed 5811 /// #pragma {STDC,OPENCL} FP_CONTRACT 5812 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5813 5814 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5815 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5816 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5817 5818 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5819 void AddMsStructLayoutForRecord(RecordDecl *RD); 5820 5821 /// FreePackedContext - Deallocate and null out PackContext. 5822 void FreePackedContext(); 5823 5824 /// PushNamespaceVisibilityAttr - Note that we've entered a 5825 /// namespace with a visibility attribute. 5826 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5827 SourceLocation Loc); 5828 5829 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5830 /// add an appropriate visibility attribute. 5831 void AddPushedVisibilityAttribute(Decl *RD); 5832 5833 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5834 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5835 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5836 5837 /// FreeVisContext - Deallocate and null out VisContext. 5838 void FreeVisContext(); 5839 5840 /// AddCFAuditedAttribute - Check whether we're currently within 5841 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5842 /// the appropriate attribute. 5843 void AddCFAuditedAttribute(Decl *D); 5844 5845 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5846 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5847 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5848 5849 /// \brief The kind of conversion being performed. 5850 enum CheckedConversionKind { 5851 /// \brief An implicit conversion. 5852 CCK_ImplicitConversion, 5853 /// \brief A C-style cast. 5854 CCK_CStyleCast, 5855 /// \brief A functional-style cast. 5856 CCK_FunctionalCast, 5857 /// \brief A cast other than a C-style cast. 5858 CCK_OtherCast 5859 }; 5860 5861 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5862 /// cast. If there is already an implicit cast, merge into the existing one. 5863 /// If isLvalue, the result of the cast is an lvalue. 5864 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5865 ExprValueKind VK = VK_RValue, 5866 const CXXCastPath *BasePath = 0, 5867 CheckedConversionKind CCK 5868 = CCK_ImplicitConversion); 5869 5870 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5871 /// to the conversion from scalar type ScalarTy to the Boolean type. 5872 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5873 5874 /// IgnoredValueConversions - Given that an expression's result is 5875 /// syntactically ignored, perform any conversions that are 5876 /// required. 5877 ExprResult IgnoredValueConversions(Expr *E); 5878 5879 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5880 // functions and arrays to their respective pointers (C99 6.3.2.1). 5881 ExprResult UsualUnaryConversions(Expr *E); 5882 5883 // DefaultFunctionArrayConversion - converts functions and arrays 5884 // to their respective pointers (C99 6.3.2.1). 5885 ExprResult DefaultFunctionArrayConversion(Expr *E); 5886 5887 // DefaultFunctionArrayLvalueConversion - converts functions and 5888 // arrays to their respective pointers and performs the 5889 // lvalue-to-rvalue conversion. 5890 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5891 5892 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5893 // the operand. This is DefaultFunctionArrayLvalueConversion, 5894 // except that it assumes the operand isn't of function or array 5895 // type. 5896 ExprResult DefaultLvalueConversion(Expr *E); 5897 5898 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5899 // do not have a prototype. Integer promotions are performed on each 5900 // argument, and arguments that have type float are promoted to double. 5901 ExprResult DefaultArgumentPromotion(Expr *E); 5902 5903 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5904 enum VariadicCallType { 5905 VariadicFunction, 5906 VariadicBlock, 5907 VariadicMethod, 5908 VariadicConstructor, 5909 VariadicDoesNotApply 5910 }; 5911 5912 /// GatherArgumentsForCall - Collector argument expressions for various 5913 /// form of call prototypes. 5914 bool GatherArgumentsForCall(SourceLocation CallLoc, 5915 FunctionDecl *FDecl, 5916 const FunctionProtoType *Proto, 5917 unsigned FirstProtoArg, 5918 Expr **Args, unsigned NumArgs, 5919 SmallVector<Expr *, 8> &AllArgs, 5920 VariadicCallType CallType = VariadicDoesNotApply, 5921 bool AllowExplicit = false); 5922 5923 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5924 // will warn if the resulting type is not a POD type. 5925 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5926 FunctionDecl *FDecl); 5927 5928 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5929 // operands and then handles various conversions that are common to binary 5930 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5931 // routine returns the first non-arithmetic type found. The client is 5932 // responsible for emitting appropriate error diagnostics. 5933 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5934 bool IsCompAssign = false); 5935 5936 /// AssignConvertType - All of the 'assignment' semantic checks return this 5937 /// enum to indicate whether the assignment was allowed. These checks are 5938 /// done for simple assignments, as well as initialization, return from 5939 /// function, argument passing, etc. The query is phrased in terms of a 5940 /// source and destination type. 5941 enum AssignConvertType { 5942 /// Compatible - the types are compatible according to the standard. 5943 Compatible, 5944 5945 /// PointerToInt - The assignment converts a pointer to an int, which we 5946 /// accept as an extension. 5947 PointerToInt, 5948 5949 /// IntToPointer - The assignment converts an int to a pointer, which we 5950 /// accept as an extension. 5951 IntToPointer, 5952 5953 /// FunctionVoidPointer - The assignment is between a function pointer and 5954 /// void*, which the standard doesn't allow, but we accept as an extension. 5955 FunctionVoidPointer, 5956 5957 /// IncompatiblePointer - The assignment is between two pointers types that 5958 /// are not compatible, but we accept them as an extension. 5959 IncompatiblePointer, 5960 5961 /// IncompatiblePointer - The assignment is between two pointers types which 5962 /// point to integers which have a different sign, but are otherwise 5963 /// identical. This is a subset of the above, but broken out because it's by 5964 /// far the most common case of incompatible pointers. 5965 IncompatiblePointerSign, 5966 5967 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5968 /// c/v/r qualifiers, which we accept as an extension. 5969 CompatiblePointerDiscardsQualifiers, 5970 5971 /// IncompatiblePointerDiscardsQualifiers - The assignment 5972 /// discards qualifiers that we don't permit to be discarded, 5973 /// like address spaces. 5974 IncompatiblePointerDiscardsQualifiers, 5975 5976 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5977 /// nested pointer types, and the qualifiers other than the first two 5978 /// levels differ e.g. char ** -> const char **, but we accept them as an 5979 /// extension. 5980 IncompatibleNestedPointerQualifiers, 5981 5982 /// IncompatibleVectors - The assignment is between two vector types that 5983 /// have the same size, which we accept as an extension. 5984 IncompatibleVectors, 5985 5986 /// IntToBlockPointer - The assignment converts an int to a block 5987 /// pointer. We disallow this. 5988 IntToBlockPointer, 5989 5990 /// IncompatibleBlockPointer - The assignment is between two block 5991 /// pointers types that are not compatible. 5992 IncompatibleBlockPointer, 5993 5994 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5995 /// id type and something else (that is incompatible with it). For example, 5996 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5997 IncompatibleObjCQualifiedId, 5998 5999 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6000 /// object with __weak qualifier. 6001 IncompatibleObjCWeakRef, 6002 6003 /// Incompatible - We reject this conversion outright, it is invalid to 6004 /// represent it in the AST. 6005 Incompatible 6006 }; 6007 6008 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6009 /// assignment conversion type specified by ConvTy. This returns true if the 6010 /// conversion was invalid or false if the conversion was accepted. 6011 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6012 SourceLocation Loc, 6013 QualType DstType, QualType SrcType, 6014 Expr *SrcExpr, AssignmentAction Action, 6015 bool *Complained = 0); 6016 6017 /// CheckAssignmentConstraints - Perform type checking for assignment, 6018 /// argument passing, variable initialization, and function return values. 6019 /// C99 6.5.16. 6020 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6021 QualType LHSType, 6022 QualType RHSType); 6023 6024 /// Check assignment constraints and prepare for a conversion of the 6025 /// RHS to the LHS type. 6026 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6027 ExprResult &RHS, 6028 CastKind &Kind); 6029 6030 // CheckSingleAssignmentConstraints - Currently used by 6031 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6032 // this routine performs the default function/array converions. 6033 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6034 ExprResult &RHS, 6035 bool Diagnose = true); 6036 6037 // \brief If the lhs type is a transparent union, check whether we 6038 // can initialize the transparent union with the given expression. 6039 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6040 ExprResult &RHS); 6041 6042 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6043 6044 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6045 6046 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6047 AssignmentAction Action, 6048 bool AllowExplicit = false); 6049 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6050 AssignmentAction Action, 6051 bool AllowExplicit, 6052 ImplicitConversionSequence& ICS); 6053 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6054 const ImplicitConversionSequence& ICS, 6055 AssignmentAction Action, 6056 CheckedConversionKind CCK 6057 = CCK_ImplicitConversion); 6058 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6059 const StandardConversionSequence& SCS, 6060 AssignmentAction Action, 6061 CheckedConversionKind CCK); 6062 6063 /// the following "Check" methods will return a valid/converted QualType 6064 /// or a null QualType (indicating an error diagnostic was issued). 6065 6066 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6067 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6068 ExprResult &RHS); 6069 QualType CheckPointerToMemberOperands( // C++ 5.5 6070 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6071 SourceLocation OpLoc, bool isIndirect); 6072 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6073 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6074 bool IsDivide); 6075 QualType CheckRemainderOperands( // C99 6.5.5 6076 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6077 bool IsCompAssign = false); 6078 QualType CheckAdditionOperands( // C99 6.5.6 6079 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6080 QualType* CompLHSTy = 0); 6081 QualType CheckSubtractionOperands( // C99 6.5.6 6082 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6083 QualType* CompLHSTy = 0); 6084 QualType CheckShiftOperands( // C99 6.5.7 6085 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6086 bool IsCompAssign = false); 6087 QualType CheckCompareOperands( // C99 6.5.8/9 6088 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6089 bool isRelational); 6090 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6091 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6092 bool IsCompAssign = false); 6093 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6094 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6095 // CheckAssignmentOperands is used for both simple and compound assignment. 6096 // For simple assignment, pass both expressions and a null converted type. 6097 // For compound assignment, pass both expressions and the converted type. 6098 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6099 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6100 6101 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6102 UnaryOperatorKind Opcode, Expr *Op); 6103 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6104 BinaryOperatorKind Opcode, 6105 Expr *LHS, Expr *RHS); 6106 ExprResult checkPseudoObjectRValue(Expr *E); 6107 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6108 6109 QualType CheckConditionalOperands( // C99 6.5.15 6110 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6111 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6112 QualType CXXCheckConditionalOperands( // C++ 5.16 6113 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6114 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6115 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6116 bool *NonStandardCompositeType = 0); 6117 QualType FindCompositePointerType(SourceLocation Loc, 6118 ExprResult &E1, ExprResult &E2, 6119 bool *NonStandardCompositeType = 0) { 6120 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6121 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6122 NonStandardCompositeType); 6123 E1 = Owned(E1Tmp); 6124 E2 = Owned(E2Tmp); 6125 return Composite; 6126 } 6127 6128 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6129 SourceLocation QuestionLoc); 6130 6131 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6132 SourceLocation QuestionLoc); 6133 6134 /// type checking for vector binary operators. 6135 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6136 SourceLocation Loc, bool IsCompAssign); 6137 QualType GetSignedVectorType(QualType V); 6138 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6139 SourceLocation Loc, bool isRelational); 6140 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6141 SourceLocation Loc); 6142 6143 /// type checking declaration initializers (C99 6.7.8) 6144 bool CheckForConstantInitializer(Expr *e, QualType t); 6145 6146 // type checking C++ declaration initializers (C++ [dcl.init]). 6147 6148 /// ReferenceCompareResult - Expresses the result of comparing two 6149 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6150 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6151 enum ReferenceCompareResult { 6152 /// Ref_Incompatible - The two types are incompatible, so direct 6153 /// reference binding is not possible. 6154 Ref_Incompatible = 0, 6155 /// Ref_Related - The two types are reference-related, which means 6156 /// that their unqualified forms (T1 and T2) are either the same 6157 /// or T1 is a base class of T2. 6158 Ref_Related, 6159 /// Ref_Compatible_With_Added_Qualification - The two types are 6160 /// reference-compatible with added qualification, meaning that 6161 /// they are reference-compatible and the qualifiers on T1 (cv1) 6162 /// are greater than the qualifiers on T2 (cv2). 6163 Ref_Compatible_With_Added_Qualification, 6164 /// Ref_Compatible - The two types are reference-compatible and 6165 /// have equivalent qualifiers (cv1 == cv2). 6166 Ref_Compatible 6167 }; 6168 6169 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6170 QualType T1, QualType T2, 6171 bool &DerivedToBase, 6172 bool &ObjCConversion, 6173 bool &ObjCLifetimeConversion); 6174 6175 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6176 Expr *CastExpr, CastKind &CastKind, 6177 ExprValueKind &VK, CXXCastPath &Path); 6178 6179 /// \brief Force an expression with unknown-type to an expression of the 6180 /// given type. 6181 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6182 6183 // CheckVectorCast - check type constraints for vectors. 6184 // Since vectors are an extension, there are no C standard reference for this. 6185 // We allow casting between vectors and integer datatypes of the same size. 6186 // returns true if the cast is invalid 6187 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6188 CastKind &Kind); 6189 6190 // CheckExtVectorCast - check type constraints for extended vectors. 6191 // Since vectors are an extension, there are no C standard reference for this. 6192 // We allow casting between vectors and integer datatypes of the same size, 6193 // or vectors and the element type of that vector. 6194 // returns the cast expr 6195 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6196 CastKind &Kind); 6197 6198 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6199 SourceLocation LParenLoc, 6200 Expr *CastExpr, 6201 SourceLocation RParenLoc); 6202 6203 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6204 6205 /// \brief Checks for invalid conversions and casts between 6206 /// retainable pointers and other pointer kinds. 6207 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6208 QualType castType, Expr *&op, 6209 CheckedConversionKind CCK); 6210 6211 Expr *stripARCUnbridgedCast(Expr *e); 6212 void diagnoseARCUnbridgedCast(Expr *e); 6213 6214 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6215 QualType ExprType); 6216 6217 /// checkRetainCycles - Check whether an Objective-C message send 6218 /// might create an obvious retain cycle. 6219 void checkRetainCycles(ObjCMessageExpr *msg); 6220 void checkRetainCycles(Expr *receiver, Expr *argument); 6221 6222 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6223 /// to weak/__unsafe_unretained type. 6224 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6225 6226 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6227 /// to weak/__unsafe_unretained expression. 6228 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6229 6230 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6231 /// \param Method - May be null. 6232 /// \param [out] ReturnType - The return type of the send. 6233 /// \return true iff there were any incompatible types. 6234 bool CheckMessageArgumentTypes(QualType ReceiverType, 6235 Expr **Args, unsigned NumArgs, Selector Sel, 6236 ObjCMethodDecl *Method, bool isClassMessage, 6237 bool isSuperMessage, 6238 SourceLocation lbrac, SourceLocation rbrac, 6239 QualType &ReturnType, ExprValueKind &VK); 6240 6241 /// \brief Determine the result of a message send expression based on 6242 /// the type of the receiver, the method expected to receive the message, 6243 /// and the form of the message send. 6244 QualType getMessageSendResultType(QualType ReceiverType, 6245 ObjCMethodDecl *Method, 6246 bool isClassMessage, bool isSuperMessage); 6247 6248 /// \brief If the given expression involves a message send to a method 6249 /// with a related result type, emit a note describing what happened. 6250 void EmitRelatedResultTypeNote(const Expr *E); 6251 6252 /// CheckBooleanCondition - Diagnose problems involving the use of 6253 /// the given expression as a boolean condition (e.g. in an if 6254 /// statement). Also performs the standard function and array 6255 /// decays, possibly changing the input variable. 6256 /// 6257 /// \param Loc - A location associated with the condition, e.g. the 6258 /// 'if' keyword. 6259 /// \return true iff there were any errors 6260 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6261 6262 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6263 Expr *SubExpr); 6264 6265 /// DiagnoseAssignmentAsCondition - Given that an expression is 6266 /// being used as a boolean condition, warn if it's an assignment. 6267 void DiagnoseAssignmentAsCondition(Expr *E); 6268 6269 /// \brief Redundant parentheses over an equality comparison can indicate 6270 /// that the user intended an assignment used as condition. 6271 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6272 6273 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6274 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6275 6276 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6277 /// the specified width and sign. If an overflow occurs, detect it and emit 6278 /// the specified diagnostic. 6279 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6280 unsigned NewWidth, bool NewSign, 6281 SourceLocation Loc, unsigned DiagID); 6282 6283 /// Checks that the Objective-C declaration is declared in the global scope. 6284 /// Emits an error and marks the declaration as invalid if it's not declared 6285 /// in the global scope. 6286 bool CheckObjCDeclScope(Decl *D); 6287 6288 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6289 /// and reports the appropriate diagnostics. Returns false on success. 6290 /// Can optionally return the value of the expression. 6291 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6292 PartialDiagnostic Diag, 6293 bool AllowFold, 6294 PartialDiagnostic FoldDiag); 6295 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6296 PartialDiagnostic Diag, 6297 bool AllowFold = true) { 6298 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6299 PDiag(0)); 6300 } 6301 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6302 6303 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6304 /// the correct width, and that the field type is valid. 6305 /// Returns false on success. 6306 /// Can optionally return whether the bit-field is of width 0 6307 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6308 QualType FieldTy, Expr *BitWidth, 6309 bool *ZeroWidth = 0); 6310 6311 enum CUDAFunctionTarget { 6312 CFT_Device, 6313 CFT_Global, 6314 CFT_Host, 6315 CFT_HostDevice 6316 }; 6317 6318 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6319 6320 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6321 CUDAFunctionTarget CalleeTarget); 6322 6323 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6324 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6325 IdentifyCUDATarget(Callee)); 6326 } 6327 6328 /// \name Code completion 6329 //@{ 6330 /// \brief Describes the context in which code completion occurs. 6331 enum ParserCompletionContext { 6332 /// \brief Code completion occurs at top-level or namespace context. 6333 PCC_Namespace, 6334 /// \brief Code completion occurs within a class, struct, or union. 6335 PCC_Class, 6336 /// \brief Code completion occurs within an Objective-C interface, protocol, 6337 /// or category. 6338 PCC_ObjCInterface, 6339 /// \brief Code completion occurs within an Objective-C implementation or 6340 /// category implementation 6341 PCC_ObjCImplementation, 6342 /// \brief Code completion occurs within the list of instance variables 6343 /// in an Objective-C interface, protocol, category, or implementation. 6344 PCC_ObjCInstanceVariableList, 6345 /// \brief Code completion occurs following one or more template 6346 /// headers. 6347 PCC_Template, 6348 /// \brief Code completion occurs following one or more template 6349 /// headers within a class. 6350 PCC_MemberTemplate, 6351 /// \brief Code completion occurs within an expression. 6352 PCC_Expression, 6353 /// \brief Code completion occurs within a statement, which may 6354 /// also be an expression or a declaration. 6355 PCC_Statement, 6356 /// \brief Code completion occurs at the beginning of the 6357 /// initialization statement (or expression) in a for loop. 6358 PCC_ForInit, 6359 /// \brief Code completion occurs within the condition of an if, 6360 /// while, switch, or for statement. 6361 PCC_Condition, 6362 /// \brief Code completion occurs within the body of a function on a 6363 /// recovery path, where we do not have a specific handle on our position 6364 /// in the grammar. 6365 PCC_RecoveryInFunction, 6366 /// \brief Code completion occurs where only a type is permitted. 6367 PCC_Type, 6368 /// \brief Code completion occurs in a parenthesized expression, which 6369 /// might also be a type cast. 6370 PCC_ParenthesizedExpression, 6371 /// \brief Code completion occurs within a sequence of declaration 6372 /// specifiers within a function, method, or block. 6373 PCC_LocalDeclarationSpecifiers 6374 }; 6375 6376 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6377 void CodeCompleteOrdinaryName(Scope *S, 6378 ParserCompletionContext CompletionContext); 6379 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6380 bool AllowNonIdentifiers, 6381 bool AllowNestedNameSpecifiers); 6382 6383 struct CodeCompleteExpressionData; 6384 void CodeCompleteExpression(Scope *S, 6385 const CodeCompleteExpressionData &Data); 6386 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6387 SourceLocation OpLoc, 6388 bool IsArrow); 6389 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6390 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6391 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6392 void CodeCompleteCase(Scope *S); 6393 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6394 void CodeCompleteInitializer(Scope *S, Decl *D); 6395 void CodeCompleteReturn(Scope *S); 6396 void CodeCompleteAfterIf(Scope *S); 6397 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6398 6399 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6400 bool EnteringContext); 6401 void CodeCompleteUsing(Scope *S); 6402 void CodeCompleteUsingDirective(Scope *S); 6403 void CodeCompleteNamespaceDecl(Scope *S); 6404 void CodeCompleteNamespaceAliasDecl(Scope *S); 6405 void CodeCompleteOperatorName(Scope *S); 6406 void CodeCompleteConstructorInitializer(Decl *Constructor, 6407 CXXCtorInitializer** Initializers, 6408 unsigned NumInitializers); 6409 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6410 bool AfterAmpersand); 6411 6412 void CodeCompleteObjCAtDirective(Scope *S); 6413 void CodeCompleteObjCAtVisibility(Scope *S); 6414 void CodeCompleteObjCAtStatement(Scope *S); 6415 void CodeCompleteObjCAtExpression(Scope *S); 6416 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6417 void CodeCompleteObjCPropertyGetter(Scope *S); 6418 void CodeCompleteObjCPropertySetter(Scope *S); 6419 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6420 bool IsParameter); 6421 void CodeCompleteObjCMessageReceiver(Scope *S); 6422 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6423 IdentifierInfo **SelIdents, 6424 unsigned NumSelIdents, 6425 bool AtArgumentExpression); 6426 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6427 IdentifierInfo **SelIdents, 6428 unsigned NumSelIdents, 6429 bool AtArgumentExpression, 6430 bool IsSuper = false); 6431 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6432 IdentifierInfo **SelIdents, 6433 unsigned NumSelIdents, 6434 bool AtArgumentExpression, 6435 ObjCInterfaceDecl *Super = 0); 6436 void CodeCompleteObjCForCollection(Scope *S, 6437 DeclGroupPtrTy IterationVar); 6438 void CodeCompleteObjCSelector(Scope *S, 6439 IdentifierInfo **SelIdents, 6440 unsigned NumSelIdents); 6441 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6442 unsigned NumProtocols); 6443 void CodeCompleteObjCProtocolDecl(Scope *S); 6444 void CodeCompleteObjCInterfaceDecl(Scope *S); 6445 void CodeCompleteObjCSuperclass(Scope *S, 6446 IdentifierInfo *ClassName, 6447 SourceLocation ClassNameLoc); 6448 void CodeCompleteObjCImplementationDecl(Scope *S); 6449 void CodeCompleteObjCInterfaceCategory(Scope *S, 6450 IdentifierInfo *ClassName, 6451 SourceLocation ClassNameLoc); 6452 void CodeCompleteObjCImplementationCategory(Scope *S, 6453 IdentifierInfo *ClassName, 6454 SourceLocation ClassNameLoc); 6455 void CodeCompleteObjCPropertyDefinition(Scope *S); 6456 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6457 IdentifierInfo *PropertyName); 6458 void CodeCompleteObjCMethodDecl(Scope *S, 6459 bool IsInstanceMethod, 6460 ParsedType ReturnType); 6461 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6462 bool IsInstanceMethod, 6463 bool AtParameterName, 6464 ParsedType ReturnType, 6465 IdentifierInfo **SelIdents, 6466 unsigned NumSelIdents); 6467 void CodeCompletePreprocessorDirective(bool InConditional); 6468 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6469 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6470 void CodeCompletePreprocessorExpression(); 6471 void CodeCompletePreprocessorMacroArgument(Scope *S, 6472 IdentifierInfo *Macro, 6473 MacroInfo *MacroInfo, 6474 unsigned Argument); 6475 void CodeCompleteNaturalLanguage(); 6476 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6477 SmallVectorImpl<CodeCompletionResult> &Results); 6478 //@} 6479 6480 //===--------------------------------------------------------------------===// 6481 // Extra semantic analysis beyond the C type system 6482 6483public: 6484 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6485 unsigned ByteNo) const; 6486 6487private: 6488 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6489 const ArraySubscriptExpr *ASE=0, 6490 bool AllowOnePastEnd=true, bool IndexNegated=false); 6491 void CheckArrayAccess(const Expr *E); 6492 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6493 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6494 Expr **Args, unsigned NumArgs); 6495 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6496 6497 bool CheckObjCString(Expr *Arg); 6498 6499 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6500 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6501 6502 bool SemaBuiltinVAStart(CallExpr *TheCall); 6503 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6504 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6505 6506public: 6507 // Used by C++ template instantiation. 6508 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6509 6510private: 6511 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6512 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6513 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6514 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6515 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6516 AtomicExpr::AtomicOp Op); 6517 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6518 llvm::APSInt &Result); 6519 6520 enum FormatStringType { 6521 FST_Scanf, 6522 FST_Printf, 6523 FST_NSString, 6524 FST_Strftime, 6525 FST_Strfmon, 6526 FST_Kprintf, 6527 FST_Unknown 6528 }; 6529 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6530 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6531 bool HasVAListArg, unsigned format_idx, 6532 unsigned firstDataArg, FormatStringType Type, 6533 bool inFunctionCall = true); 6534 6535 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6536 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6537 unsigned format_idx, unsigned firstDataArg, 6538 FormatStringType Type, bool inFunctionCall); 6539 6540 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6541 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6542 unsigned NumArgs, bool IsCXXMember, 6543 SourceLocation Loc, SourceRange Range); 6544 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6545 bool HasVAListArg, unsigned format_idx, 6546 unsigned firstDataArg, FormatStringType Type, 6547 SourceLocation Loc, SourceRange range); 6548 6549 void CheckNonNullArguments(const NonNullAttr *NonNull, 6550 const Expr * const *ExprArgs, 6551 SourceLocation CallSiteLoc); 6552 6553 void CheckMemaccessArguments(const CallExpr *Call, 6554 unsigned BId, 6555 IdentifierInfo *FnName); 6556 6557 void CheckStrlcpycatArguments(const CallExpr *Call, 6558 IdentifierInfo *FnName); 6559 6560 void CheckStrncatArguments(const CallExpr *Call, 6561 IdentifierInfo *FnName); 6562 6563 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6564 SourceLocation ReturnLoc); 6565 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6566 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6567 6568 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6569 Expr *Init); 6570 6571 /// \brief The parser's current scope. 6572 /// 6573 /// The parser maintains this state here. 6574 Scope *CurScope; 6575 6576protected: 6577 friend class Parser; 6578 friend class InitializationSequence; 6579 friend class ASTReader; 6580 friend class ASTWriter; 6581 6582public: 6583 /// \brief Retrieve the parser's current scope. 6584 /// 6585 /// This routine must only be used when it is certain that semantic analysis 6586 /// and the parser are in precisely the same context, which is not the case 6587 /// when, e.g., we are performing any kind of template instantiation. 6588 /// Therefore, the only safe places to use this scope are in the parser 6589 /// itself and in routines directly invoked from the parser and *never* from 6590 /// template substitution or instantiation. 6591 Scope *getCurScope() const { return CurScope; } 6592 6593 Decl *getObjCDeclContext() const; 6594 6595 DeclContext *getCurLexicalContext() const { 6596 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6597 } 6598 6599 AvailabilityResult getCurContextAvailability() const; 6600}; 6601 6602/// \brief RAII object that enters a new expression evaluation context. 6603class EnterExpressionEvaluationContext { 6604 Sema &Actions; 6605 6606public: 6607 EnterExpressionEvaluationContext(Sema &Actions, 6608 Sema::ExpressionEvaluationContext NewContext, 6609 Decl *LambdaContextDecl = 0, 6610 bool IsDecltype = false) 6611 : Actions(Actions) { 6612 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6613 IsDecltype); 6614 } 6615 6616 ~EnterExpressionEvaluationContext() { 6617 Actions.PopExpressionEvaluationContext(); 6618 } 6619}; 6620 6621} // end namespace clang 6622 6623#endif 6624