Sema.h revision 4fe5be028b723fedc28bb33be96cde1ab2574ee6
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 ExprResult PerformObjectArgumentInitialization(Expr *From, 1463 NestedNameSpecifier *Qualifier, 1464 NamedDecl *FoundDecl, 1465 CXXMethodDecl *Method); 1466 1467 ExprResult PerformContextuallyConvertToBool(Expr *From); 1468 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1469 1470 /// Contexts in which a converted constant expression is required. 1471 enum CCEKind { 1472 CCEK_CaseValue, ///< Expression in a case label. 1473 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1474 CCEK_TemplateArg ///< Value of a non-type template parameter. 1475 }; 1476 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1477 llvm::APSInt &Value, CCEKind CCE); 1478 1479 ExprResult 1480 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1481 const PartialDiagnostic &NotIntDiag, 1482 const PartialDiagnostic &IncompleteDiag, 1483 const PartialDiagnostic &ExplicitConvDiag, 1484 const PartialDiagnostic &ExplicitConvNote, 1485 const PartialDiagnostic &AmbigDiag, 1486 const PartialDiagnostic &AmbigNote, 1487 const PartialDiagnostic &ConvDiag, 1488 bool AllowScopedEnumerations); 1489 1490 ExprResult PerformObjectMemberConversion(Expr *From, 1491 NestedNameSpecifier *Qualifier, 1492 NamedDecl *FoundDecl, 1493 NamedDecl *Member); 1494 1495 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1496 // TODO: make this is a typesafe union. 1497 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1498 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1499 1500 void AddOverloadCandidate(FunctionDecl *Function, 1501 DeclAccessPair FoundDecl, 1502 Expr **Args, unsigned NumArgs, 1503 OverloadCandidateSet& CandidateSet, 1504 bool SuppressUserConversions = false, 1505 bool PartialOverloading = false); 1506 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1507 Expr **Args, unsigned NumArgs, 1508 OverloadCandidateSet& CandidateSet, 1509 bool SuppressUserConversions = false); 1510 void AddMethodCandidate(DeclAccessPair FoundDecl, 1511 QualType ObjectType, 1512 Expr::Classification ObjectClassification, 1513 Expr **Args, unsigned NumArgs, 1514 OverloadCandidateSet& CandidateSet, 1515 bool SuppressUserConversion = false); 1516 void AddMethodCandidate(CXXMethodDecl *Method, 1517 DeclAccessPair FoundDecl, 1518 CXXRecordDecl *ActingContext, QualType ObjectType, 1519 Expr::Classification ObjectClassification, 1520 Expr **Args, unsigned NumArgs, 1521 OverloadCandidateSet& CandidateSet, 1522 bool SuppressUserConversions = false); 1523 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1524 DeclAccessPair FoundDecl, 1525 CXXRecordDecl *ActingContext, 1526 TemplateArgumentListInfo *ExplicitTemplateArgs, 1527 QualType ObjectType, 1528 Expr::Classification ObjectClassification, 1529 Expr **Args, unsigned NumArgs, 1530 OverloadCandidateSet& CandidateSet, 1531 bool SuppressUserConversions = false); 1532 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1533 DeclAccessPair FoundDecl, 1534 TemplateArgumentListInfo *ExplicitTemplateArgs, 1535 Expr **Args, unsigned NumArgs, 1536 OverloadCandidateSet& CandidateSet, 1537 bool SuppressUserConversions = false); 1538 void AddConversionCandidate(CXXConversionDecl *Conversion, 1539 DeclAccessPair FoundDecl, 1540 CXXRecordDecl *ActingContext, 1541 Expr *From, QualType ToType, 1542 OverloadCandidateSet& CandidateSet); 1543 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1544 DeclAccessPair FoundDecl, 1545 CXXRecordDecl *ActingContext, 1546 Expr *From, QualType ToType, 1547 OverloadCandidateSet &CandidateSet); 1548 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1549 DeclAccessPair FoundDecl, 1550 CXXRecordDecl *ActingContext, 1551 const FunctionProtoType *Proto, 1552 Expr *Object, Expr **Args, unsigned NumArgs, 1553 OverloadCandidateSet& CandidateSet); 1554 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1555 SourceLocation OpLoc, 1556 Expr **Args, unsigned NumArgs, 1557 OverloadCandidateSet& CandidateSet, 1558 SourceRange OpRange = SourceRange()); 1559 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1560 Expr **Args, unsigned NumArgs, 1561 OverloadCandidateSet& CandidateSet, 1562 bool IsAssignmentOperator = false, 1563 unsigned NumContextualBoolArguments = 0); 1564 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1565 SourceLocation OpLoc, 1566 Expr **Args, unsigned NumArgs, 1567 OverloadCandidateSet& CandidateSet); 1568 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1569 bool Operator, 1570 Expr **Args, unsigned NumArgs, 1571 TemplateArgumentListInfo *ExplicitTemplateArgs, 1572 OverloadCandidateSet& CandidateSet, 1573 bool PartialOverloading = false, 1574 bool StdNamespaceIsAssociated = false); 1575 1576 // Emit as a 'note' the specific overload candidate 1577 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1578 1579 // Emit as a series of 'note's all template and non-templates 1580 // identified by the expression Expr 1581 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1582 1583 // [PossiblyAFunctionType] --> [Return] 1584 // NonFunctionType --> NonFunctionType 1585 // R (A) --> R(A) 1586 // R (*)(A) --> R (A) 1587 // R (&)(A) --> R (A) 1588 // R (S::*)(A) --> R (A) 1589 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1590 1591 FunctionDecl * 1592 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1593 QualType TargetType, 1594 bool Complain, 1595 DeclAccessPair &Found, 1596 bool *pHadMultipleCandidates = 0); 1597 1598 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1599 bool Complain = false, 1600 DeclAccessPair* Found = 0); 1601 1602 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1603 ExprResult &SrcExpr, 1604 bool DoFunctionPointerConverion = false, 1605 bool Complain = false, 1606 const SourceRange& OpRangeForComplaining = SourceRange(), 1607 QualType DestTypeForComplaining = QualType(), 1608 unsigned DiagIDForComplaining = 0); 1609 1610 1611 Expr *FixOverloadedFunctionReference(Expr *E, 1612 DeclAccessPair FoundDecl, 1613 FunctionDecl *Fn); 1614 ExprResult FixOverloadedFunctionReference(ExprResult, 1615 DeclAccessPair FoundDecl, 1616 FunctionDecl *Fn); 1617 1618 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1619 Expr **Args, unsigned NumArgs, 1620 OverloadCandidateSet &CandidateSet, 1621 bool PartialOverloading = false); 1622 1623 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1624 UnresolvedLookupExpr *ULE, 1625 SourceLocation LParenLoc, 1626 Expr **Args, unsigned NumArgs, 1627 SourceLocation RParenLoc, 1628 Expr *ExecConfig, 1629 bool AllowTypoCorrection=true); 1630 1631 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1632 unsigned Opc, 1633 const UnresolvedSetImpl &Fns, 1634 Expr *input); 1635 1636 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1637 unsigned Opc, 1638 const UnresolvedSetImpl &Fns, 1639 Expr *LHS, Expr *RHS); 1640 1641 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1642 SourceLocation RLoc, 1643 Expr *Base,Expr *Idx); 1644 1645 ExprResult 1646 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1647 SourceLocation LParenLoc, Expr **Args, 1648 unsigned NumArgs, SourceLocation RParenLoc); 1649 ExprResult 1650 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1651 Expr **Args, unsigned NumArgs, 1652 SourceLocation RParenLoc); 1653 1654 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1655 SourceLocation OpLoc); 1656 1657 /// CheckCallReturnType - Checks that a call expression's return type is 1658 /// complete. Returns true on failure. The location passed in is the location 1659 /// that best represents the call. 1660 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1661 CallExpr *CE, FunctionDecl *FD); 1662 1663 /// Helpers for dealing with blocks and functions. 1664 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1665 bool CheckParameterNames); 1666 void CheckCXXDefaultArguments(FunctionDecl *FD); 1667 void CheckExtraCXXDefaultArguments(Declarator &D); 1668 Scope *getNonFieldDeclScope(Scope *S); 1669 1670 /// \name Name lookup 1671 /// 1672 /// These routines provide name lookup that is used during semantic 1673 /// analysis to resolve the various kinds of names (identifiers, 1674 /// overloaded operator names, constructor names, etc.) into zero or 1675 /// more declarations within a particular scope. The major entry 1676 /// points are LookupName, which performs unqualified name lookup, 1677 /// and LookupQualifiedName, which performs qualified name lookup. 1678 /// 1679 /// All name lookup is performed based on some specific criteria, 1680 /// which specify what names will be visible to name lookup and how 1681 /// far name lookup should work. These criteria are important both 1682 /// for capturing language semantics (certain lookups will ignore 1683 /// certain names, for example) and for performance, since name 1684 /// lookup is often a bottleneck in the compilation of C++. Name 1685 /// lookup criteria is specified via the LookupCriteria enumeration. 1686 /// 1687 /// The results of name lookup can vary based on the kind of name 1688 /// lookup performed, the current language, and the translation 1689 /// unit. In C, for example, name lookup will either return nothing 1690 /// (no entity found) or a single declaration. In C++, name lookup 1691 /// can additionally refer to a set of overloaded functions or 1692 /// result in an ambiguity. All of the possible results of name 1693 /// lookup are captured by the LookupResult class, which provides 1694 /// the ability to distinguish among them. 1695 //@{ 1696 1697 /// @brief Describes the kind of name lookup to perform. 1698 enum LookupNameKind { 1699 /// Ordinary name lookup, which finds ordinary names (functions, 1700 /// variables, typedefs, etc.) in C and most kinds of names 1701 /// (functions, variables, members, types, etc.) in C++. 1702 LookupOrdinaryName = 0, 1703 /// Tag name lookup, which finds the names of enums, classes, 1704 /// structs, and unions. 1705 LookupTagName, 1706 /// Label name lookup. 1707 LookupLabel, 1708 /// Member name lookup, which finds the names of 1709 /// class/struct/union members. 1710 LookupMemberName, 1711 /// Look up of an operator name (e.g., operator+) for use with 1712 /// operator overloading. This lookup is similar to ordinary name 1713 /// lookup, but will ignore any declarations that are class members. 1714 LookupOperatorName, 1715 /// Look up of a name that precedes the '::' scope resolution 1716 /// operator in C++. This lookup completely ignores operator, object, 1717 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1718 LookupNestedNameSpecifierName, 1719 /// Look up a namespace name within a C++ using directive or 1720 /// namespace alias definition, ignoring non-namespace names (C++ 1721 /// [basic.lookup.udir]p1). 1722 LookupNamespaceName, 1723 /// Look up all declarations in a scope with the given name, 1724 /// including resolved using declarations. This is appropriate 1725 /// for checking redeclarations for a using declaration. 1726 LookupUsingDeclName, 1727 /// Look up an ordinary name that is going to be redeclared as a 1728 /// name with linkage. This lookup ignores any declarations that 1729 /// are outside of the current scope unless they have linkage. See 1730 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1731 LookupRedeclarationWithLinkage, 1732 /// Look up the name of an Objective-C protocol. 1733 LookupObjCProtocolName, 1734 /// Look up implicit 'self' parameter of an objective-c method. 1735 LookupObjCImplicitSelfParam, 1736 /// \brief Look up any declaration with any name. 1737 LookupAnyName 1738 }; 1739 1740 /// \brief Specifies whether (or how) name lookup is being performed for a 1741 /// redeclaration (vs. a reference). 1742 enum RedeclarationKind { 1743 /// \brief The lookup is a reference to this name that is not for the 1744 /// purpose of redeclaring the name. 1745 NotForRedeclaration = 0, 1746 /// \brief The lookup results will be used for redeclaration of a name, 1747 /// if an entity by that name already exists. 1748 ForRedeclaration 1749 }; 1750 1751 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1752 CXXSpecialMember SM, 1753 bool ConstArg, 1754 bool VolatileArg, 1755 bool RValueThis, 1756 bool ConstThis, 1757 bool VolatileThis); 1758 1759private: 1760 bool CppLookupName(LookupResult &R, Scope *S); 1761 1762 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1763 // 1764 // The boolean value will be true to indicate that the namespace was loaded 1765 // from an AST/PCH file, or false otherwise. 1766 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1767 1768 /// \brief Whether we have already loaded known namespaces from an extenal 1769 /// source. 1770 bool LoadedExternalKnownNamespaces; 1771 1772public: 1773 /// \brief Look up a name, looking for a single declaration. Return 1774 /// null if the results were absent, ambiguous, or overloaded. 1775 /// 1776 /// It is preferable to use the elaborated form and explicitly handle 1777 /// ambiguity and overloaded. 1778 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1779 SourceLocation Loc, 1780 LookupNameKind NameKind, 1781 RedeclarationKind Redecl 1782 = NotForRedeclaration); 1783 bool LookupName(LookupResult &R, Scope *S, 1784 bool AllowBuiltinCreation = false); 1785 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1786 bool InUnqualifiedLookup = false); 1787 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1788 bool AllowBuiltinCreation = false, 1789 bool EnteringContext = false); 1790 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1791 RedeclarationKind Redecl 1792 = NotForRedeclaration); 1793 1794 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1795 QualType T1, QualType T2, 1796 UnresolvedSetImpl &Functions); 1797 1798 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1799 SourceLocation GnuLabelLoc = SourceLocation()); 1800 1801 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1802 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1803 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1804 unsigned Quals, 1805 bool *ConstParam = 0); 1806 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1807 bool RValueThis, unsigned ThisQuals, 1808 bool *ConstParam = 0); 1809 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1810 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1811 unsigned ThisQuals); 1812 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1813 1814 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1815 Expr **Args, unsigned NumArgs, 1816 ADLResult &Functions, 1817 bool StdNamespaceIsAssociated = false); 1818 1819 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1820 VisibleDeclConsumer &Consumer, 1821 bool IncludeGlobalScope = true); 1822 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1823 VisibleDeclConsumer &Consumer, 1824 bool IncludeGlobalScope = true); 1825 1826 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1827 Sema::LookupNameKind LookupKind, 1828 Scope *S, CXXScopeSpec *SS, 1829 CorrectionCandidateCallback &CCC, 1830 DeclContext *MemberContext = 0, 1831 bool EnteringContext = false, 1832 const ObjCObjectPointerType *OPT = 0); 1833 1834 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1835 AssociatedNamespaceSet &AssociatedNamespaces, 1836 AssociatedClassSet &AssociatedClasses); 1837 1838 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1839 bool ConsiderLinkage, 1840 bool ExplicitInstantiationOrSpecialization); 1841 1842 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1843 //@} 1844 1845 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1846 SourceLocation IdLoc, 1847 bool TypoCorrection = false); 1848 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1849 Scope *S, bool ForRedeclaration, 1850 SourceLocation Loc); 1851 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1852 Scope *S); 1853 void AddKnownFunctionAttributes(FunctionDecl *FD); 1854 1855 // More parsing and symbol table subroutines. 1856 1857 // Decl attributes - this routine is the top level dispatcher. 1858 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1859 bool NonInheritable = true, bool Inheritable = true); 1860 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1861 bool NonInheritable = true, bool Inheritable = true); 1862 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1863 const AttributeList *AttrList); 1864 1865 void checkUnusedDeclAttributes(Declarator &D); 1866 1867 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1868 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1869 bool CheckNoReturnAttr(const AttributeList &attr); 1870 1871 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1872 bool &IncompleteImpl, unsigned DiagID); 1873 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1874 ObjCMethodDecl *MethodDecl, 1875 bool IsProtocolMethodDecl); 1876 1877 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1878 ObjCMethodDecl *Overridden, 1879 bool IsProtocolMethodDecl); 1880 1881 /// WarnExactTypedMethods - This routine issues a warning if method 1882 /// implementation declaration matches exactly that of its declaration. 1883 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1884 ObjCMethodDecl *MethodDecl, 1885 bool IsProtocolMethodDecl); 1886 1887 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1888 ObjCInterfaceDecl *IDecl); 1889 1890 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1891 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1892 1893 /// CheckProtocolMethodDefs - This routine checks unimplemented 1894 /// methods declared in protocol, and those referenced by it. 1895 /// \param IDecl - Used for checking for methods which may have been 1896 /// inherited. 1897 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1898 ObjCProtocolDecl *PDecl, 1899 bool& IncompleteImpl, 1900 const SelectorSet &InsMap, 1901 const SelectorSet &ClsMap, 1902 ObjCContainerDecl *CDecl); 1903 1904 /// CheckImplementationIvars - This routine checks if the instance variables 1905 /// listed in the implelementation match those listed in the interface. 1906 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1907 ObjCIvarDecl **Fields, unsigned nIvars, 1908 SourceLocation Loc); 1909 1910 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1911 /// remains unimplemented in the class or category @implementation. 1912 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1913 ObjCContainerDecl* IDecl, 1914 bool IncompleteImpl = false); 1915 1916 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1917 /// which must be implemented by this implementation. 1918 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1919 ObjCContainerDecl *CDecl, 1920 const SelectorSet &InsMap); 1921 1922 /// DefaultSynthesizeProperties - This routine default synthesizes all 1923 /// properties which must be synthesized in class's @implementation. 1924 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1925 ObjCInterfaceDecl *IDecl); 1926 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1927 1928 /// CollectImmediateProperties - This routine collects all properties in 1929 /// the class and its conforming protocols; but not those it its super class. 1930 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1931 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1932 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1933 1934 1935 /// LookupPropertyDecl - Looks up a property in the current class and all 1936 /// its protocols. 1937 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1938 IdentifierInfo *II); 1939 1940 /// Called by ActOnProperty to handle @property declarations in 1941 //// class extensions. 1942 Decl *HandlePropertyInClassExtension(Scope *S, 1943 SourceLocation AtLoc, 1944 FieldDeclarator &FD, 1945 Selector GetterSel, 1946 Selector SetterSel, 1947 const bool isAssign, 1948 const bool isReadWrite, 1949 const unsigned Attributes, 1950 const unsigned AttributesAsWritten, 1951 bool *isOverridingProperty, 1952 TypeSourceInfo *T, 1953 tok::ObjCKeywordKind MethodImplKind); 1954 1955 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1956 /// handle creating the ObjcPropertyDecl for a category or @interface. 1957 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1958 ObjCContainerDecl *CDecl, 1959 SourceLocation AtLoc, 1960 FieldDeclarator &FD, 1961 Selector GetterSel, 1962 Selector SetterSel, 1963 const bool isAssign, 1964 const bool isReadWrite, 1965 const unsigned Attributes, 1966 const unsigned AttributesAsWritten, 1967 TypeSourceInfo *T, 1968 tok::ObjCKeywordKind MethodImplKind, 1969 DeclContext *lexicalDC = 0); 1970 1971 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1972 /// warning) when atomic property has one but not the other user-declared 1973 /// setter or getter. 1974 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1975 ObjCContainerDecl* IDecl); 1976 1977 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1978 1979 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1980 1981 enum MethodMatchStrategy { 1982 MMS_loose, 1983 MMS_strict 1984 }; 1985 1986 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1987 /// true, or false, accordingly. 1988 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1989 const ObjCMethodDecl *PrevMethod, 1990 MethodMatchStrategy strategy = MMS_strict); 1991 1992 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1993 /// or protocol against those declared in their implementations. 1994 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1995 const SelectorSet &ClsMap, 1996 SelectorSet &InsMapSeen, 1997 SelectorSet &ClsMapSeen, 1998 ObjCImplDecl* IMPDecl, 1999 ObjCContainerDecl* IDecl, 2000 bool &IncompleteImpl, 2001 bool ImmediateClass, 2002 bool WarnCategoryMethodImpl=false); 2003 2004 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2005 /// category matches with those implemented in its primary class and 2006 /// warns each time an exact match is found. 2007 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2008 2009 /// \brief Add the given method to the list of globally-known methods. 2010 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2011 2012private: 2013 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2014 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2015 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2016 2017 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2018 /// optionally warns if there are multiple signatures. 2019 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2020 bool receiverIdOrClass, 2021 bool warn, bool instance); 2022 2023public: 2024 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2025 /// unit are added to a global pool. This allows us to efficiently associate 2026 /// a selector with a method declaraation for purposes of typechecking 2027 /// messages sent to "id" (where the class of the object is unknown). 2028 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2029 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2030 } 2031 2032 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2033 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2034 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2035 } 2036 2037 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2038 /// pool. 2039 void AddAnyMethodToGlobalPool(Decl *D); 2040 2041 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2042 /// there are multiple signatures. 2043 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2044 bool receiverIdOrClass=false, 2045 bool warn=true) { 2046 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2047 warn, /*instance*/true); 2048 } 2049 2050 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2051 /// there are multiple signatures. 2052 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2053 bool receiverIdOrClass=false, 2054 bool warn=true) { 2055 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2056 warn, /*instance*/false); 2057 } 2058 2059 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2060 /// implementation. 2061 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2062 2063 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2064 /// initialization. 2065 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2066 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2067 2068 //===--------------------------------------------------------------------===// 2069 // Statement Parsing Callbacks: SemaStmt.cpp. 2070public: 2071 class FullExprArg { 2072 public: 2073 FullExprArg(Sema &actions) : E(0) { } 2074 2075 // FIXME: The const_cast here is ugly. RValue references would make this 2076 // much nicer (or we could duplicate a bunch of the move semantics 2077 // emulation code from Ownership.h). 2078 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2079 2080 ExprResult release() { 2081 return move(E); 2082 } 2083 2084 Expr *get() const { return E; } 2085 2086 Expr *operator->() { 2087 return E; 2088 } 2089 2090 private: 2091 // FIXME: No need to make the entire Sema class a friend when it's just 2092 // Sema::MakeFullExpr that needs access to the constructor below. 2093 friend class Sema; 2094 2095 explicit FullExprArg(Expr *expr) : E(expr) {} 2096 2097 Expr *E; 2098 }; 2099 2100 FullExprArg MakeFullExpr(Expr *Arg) { 2101 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2102 } 2103 2104 StmtResult ActOnExprStmt(FullExprArg Expr); 2105 2106 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2107 bool HasLeadingEmptyMacro = false); 2108 2109 void ActOnStartOfCompoundStmt(); 2110 void ActOnFinishOfCompoundStmt(); 2111 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2112 MultiStmtArg Elts, 2113 bool isStmtExpr); 2114 2115 /// \brief A RAII object to enter scope of a compound statement. 2116 class CompoundScopeRAII { 2117 public: 2118 CompoundScopeRAII(Sema &S): S(S) { 2119 S.ActOnStartOfCompoundStmt(); 2120 } 2121 2122 ~CompoundScopeRAII() { 2123 S.ActOnFinishOfCompoundStmt(); 2124 } 2125 2126 private: 2127 Sema &S; 2128 }; 2129 2130 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2131 SourceLocation StartLoc, 2132 SourceLocation EndLoc); 2133 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2134 StmtResult ActOnForEachLValueExpr(Expr *E); 2135 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2136 SourceLocation DotDotDotLoc, Expr *RHSVal, 2137 SourceLocation ColonLoc); 2138 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2139 2140 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2141 SourceLocation ColonLoc, 2142 Stmt *SubStmt, Scope *CurScope); 2143 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2144 SourceLocation ColonLoc, Stmt *SubStmt); 2145 2146 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2147 FullExprArg CondVal, Decl *CondVar, 2148 Stmt *ThenVal, 2149 SourceLocation ElseLoc, Stmt *ElseVal); 2150 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2151 Expr *Cond, 2152 Decl *CondVar); 2153 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2154 Stmt *Switch, Stmt *Body); 2155 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2156 FullExprArg Cond, 2157 Decl *CondVar, Stmt *Body); 2158 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2159 SourceLocation WhileLoc, 2160 SourceLocation CondLParen, Expr *Cond, 2161 SourceLocation CondRParen); 2162 2163 StmtResult ActOnForStmt(SourceLocation ForLoc, 2164 SourceLocation LParenLoc, 2165 Stmt *First, FullExprArg Second, 2166 Decl *SecondVar, 2167 FullExprArg Third, 2168 SourceLocation RParenLoc, 2169 Stmt *Body); 2170 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2171 Expr *collection); 2172 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2173 SourceLocation LParenLoc, 2174 Stmt *First, Expr *Second, 2175 SourceLocation RParenLoc, Stmt *Body); 2176 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2177 SourceLocation LParenLoc, Stmt *LoopVar, 2178 SourceLocation ColonLoc, Expr *Collection, 2179 SourceLocation RParenLoc); 2180 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2181 SourceLocation ColonLoc, 2182 Stmt *RangeDecl, Stmt *BeginEndDecl, 2183 Expr *Cond, Expr *Inc, 2184 Stmt *LoopVarDecl, 2185 SourceLocation RParenLoc); 2186 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2187 2188 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2189 SourceLocation LabelLoc, 2190 LabelDecl *TheDecl); 2191 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2192 SourceLocation StarLoc, 2193 Expr *DestExp); 2194 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2195 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2196 2197 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2198 bool AllowFunctionParameters); 2199 2200 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2201 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2202 2203 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2204 bool IsSimple, bool IsVolatile, 2205 unsigned NumOutputs, unsigned NumInputs, 2206 IdentifierInfo **Names, 2207 MultiExprArg Constraints, 2208 MultiExprArg Exprs, 2209 Expr *AsmString, 2210 MultiExprArg Clobbers, 2211 SourceLocation RParenLoc, 2212 bool MSAsm = false); 2213 2214 2215 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2216 SourceLocation StartLoc, 2217 SourceLocation IdLoc, IdentifierInfo *Id, 2218 bool Invalid = false); 2219 2220 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2221 2222 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2223 Decl *Parm, Stmt *Body); 2224 2225 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2226 2227 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2228 MultiStmtArg Catch, Stmt *Finally); 2229 2230 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2231 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2232 Scope *CurScope); 2233 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2234 Expr *operand); 2235 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2236 Expr *SynchExpr, 2237 Stmt *SynchBody); 2238 2239 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2240 2241 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2242 SourceLocation StartLoc, 2243 SourceLocation IdLoc, 2244 IdentifierInfo *Id); 2245 2246 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2247 2248 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2249 Decl *ExDecl, Stmt *HandlerBlock); 2250 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2251 MultiStmtArg Handlers); 2252 2253 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2254 SourceLocation TryLoc, 2255 Stmt *TryBlock, 2256 Stmt *Handler); 2257 2258 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2259 Expr *FilterExpr, 2260 Stmt *Block); 2261 2262 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2263 Stmt *Block); 2264 2265 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2266 2267 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2268 2269 /// \brief If it's a file scoped decl that must warn if not used, keep track 2270 /// of it. 2271 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2272 2273 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2274 /// whose result is unused, warn. 2275 void DiagnoseUnusedExprResult(const Stmt *S); 2276 void DiagnoseUnusedDecl(const NamedDecl *ND); 2277 2278 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2279 /// statement as a \p Body, and it is located on the same line. 2280 /// 2281 /// This helps prevent bugs due to typos, such as: 2282 /// if (condition); 2283 /// do_stuff(); 2284 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2285 const Stmt *Body, 2286 unsigned DiagID); 2287 2288 /// Warn if a for/while loop statement \p S, which is followed by 2289 /// \p PossibleBody, has a suspicious null statement as a body. 2290 void DiagnoseEmptyLoopBody(const Stmt *S, 2291 const Stmt *PossibleBody); 2292 2293 ParsingDeclState PushParsingDeclaration() { 2294 return DelayedDiagnostics.pushParsingDecl(); 2295 } 2296 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2297 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2298 } 2299 2300 typedef ProcessingContextState ParsingClassState; 2301 ParsingClassState PushParsingClass() { 2302 return DelayedDiagnostics.pushContext(); 2303 } 2304 void PopParsingClass(ParsingClassState state) { 2305 DelayedDiagnostics.popContext(state); 2306 } 2307 2308 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2309 SourceLocation Loc, 2310 const ObjCInterfaceDecl *UnknownObjCClass=0); 2311 2312 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2313 2314 bool makeUnavailableInSystemHeader(SourceLocation loc, 2315 StringRef message); 2316 2317 //===--------------------------------------------------------------------===// 2318 // Expression Parsing Callbacks: SemaExpr.cpp. 2319 2320 bool CanUseDecl(NamedDecl *D); 2321 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2322 const ObjCInterfaceDecl *UnknownObjCClass=0); 2323 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2324 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2325 ObjCMethodDecl *Getter, 2326 SourceLocation Loc); 2327 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2328 Expr **Args, unsigned NumArgs); 2329 2330 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2331 Decl *LambdaContextDecl = 0, 2332 bool IsDecltype = false); 2333 2334 void PopExpressionEvaluationContext(); 2335 2336 void DiscardCleanupsInEvaluationContext(); 2337 2338 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2339 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2340 2341 // Functions for marking a declaration referenced. These functions also 2342 // contain the relevant logic for marking if a reference to a function or 2343 // variable is an odr-use (in the C++11 sense). There are separate variants 2344 // for expressions referring to a decl; these exist because odr-use marking 2345 // needs to be delayed for some constant variables when we build one of the 2346 // named expressions. 2347 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2348 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2349 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2350 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2351 void MarkDeclRefReferenced(DeclRefExpr *E); 2352 void MarkMemberReferenced(MemberExpr *E); 2353 2354 void UpdateMarkingForLValueToRValue(Expr *E); 2355 void CleanupVarDeclMarking(); 2356 2357 enum TryCaptureKind { 2358 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2359 }; 2360 2361 /// \brief Try to capture the given variable. 2362 /// 2363 /// \param Var The variable to capture. 2364 /// 2365 /// \param Loc The location at which the capture occurs. 2366 /// 2367 /// \param Kind The kind of capture, which may be implicit (for either a 2368 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2369 /// 2370 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2371 /// an explicit lambda capture. 2372 /// 2373 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2374 /// captures or diagnose errors. If false, this routine merely check whether 2375 /// the capture can occur without performing the capture itself or complaining 2376 /// if the variable cannot be captured. 2377 /// 2378 /// \param CaptureType Will be set to the type of the field used to capture 2379 /// this variable in the innermost block or lambda. Only valid when the 2380 /// variable can be captured. 2381 /// 2382 /// \param DeclRefType Will be set to the type of a refernce to the capture 2383 /// from within the current scope. Only valid when the variable can be 2384 /// captured. 2385 /// 2386 /// \returns true if an error occurred (i.e., the variable cannot be 2387 /// captured) and false if the capture succeeded. 2388 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2389 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2390 QualType &CaptureType, 2391 QualType &DeclRefType); 2392 2393 /// \brief Try to capture the given variable. 2394 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2395 TryCaptureKind Kind = TryCapture_Implicit, 2396 SourceLocation EllipsisLoc = SourceLocation()); 2397 2398 /// \brief Given a variable, determine the type that a reference to that 2399 /// variable will have in the given scope. 2400 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2401 2402 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2403 void MarkDeclarationsReferencedInExpr(Expr *E, 2404 bool SkipLocalVariables = false); 2405 2406 /// \brief Try to recover by turning the given expression into a 2407 /// call. Returns true if recovery was attempted or an error was 2408 /// emitted; this may also leave the ExprResult invalid. 2409 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2410 bool ForceComplain = false, 2411 bool (*IsPlausibleResult)(QualType) = 0); 2412 2413 /// \brief Figure out if an expression could be turned into a call. 2414 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2415 UnresolvedSetImpl &NonTemplateOverloads); 2416 2417 /// \brief Conditionally issue a diagnostic based on the current 2418 /// evaluation context. 2419 /// 2420 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2421 /// the function body is parsed, and then do a basic reachability analysis to 2422 /// determine if the statement is reachable. If it is unreachable, the 2423 /// diagnostic will not be emitted. 2424 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2425 const PartialDiagnostic &PD); 2426 2427 // Primary Expressions. 2428 SourceRange getExprRange(Expr *E) const; 2429 2430 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2431 SourceLocation TemplateKWLoc, 2432 UnqualifiedId &Id, 2433 bool HasTrailingLParen, bool IsAddressOfOperand, 2434 CorrectionCandidateCallback *CCC = 0); 2435 2436 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2437 TemplateArgumentListInfo &Buffer, 2438 DeclarationNameInfo &NameInfo, 2439 const TemplateArgumentListInfo *&TemplateArgs); 2440 2441 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2442 CorrectionCandidateCallback &CCC, 2443 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2444 Expr **Args = 0, unsigned NumArgs = 0); 2445 2446 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2447 IdentifierInfo *II, 2448 bool AllowBuiltinCreation=false); 2449 2450 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2451 SourceLocation TemplateKWLoc, 2452 const DeclarationNameInfo &NameInfo, 2453 bool isAddressOfOperand, 2454 const TemplateArgumentListInfo *TemplateArgs); 2455 2456 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2457 ExprValueKind VK, 2458 SourceLocation Loc, 2459 const CXXScopeSpec *SS = 0); 2460 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2461 ExprValueKind VK, 2462 const DeclarationNameInfo &NameInfo, 2463 const CXXScopeSpec *SS = 0); 2464 ExprResult 2465 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2466 SourceLocation nameLoc, 2467 IndirectFieldDecl *indirectField, 2468 Expr *baseObjectExpr = 0, 2469 SourceLocation opLoc = SourceLocation()); 2470 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2471 SourceLocation TemplateKWLoc, 2472 LookupResult &R, 2473 const TemplateArgumentListInfo *TemplateArgs); 2474 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2475 SourceLocation TemplateKWLoc, 2476 LookupResult &R, 2477 const TemplateArgumentListInfo *TemplateArgs, 2478 bool IsDefiniteInstance); 2479 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2480 const LookupResult &R, 2481 bool HasTrailingLParen); 2482 2483 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2484 const DeclarationNameInfo &NameInfo); 2485 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2486 SourceLocation TemplateKWLoc, 2487 const DeclarationNameInfo &NameInfo, 2488 const TemplateArgumentListInfo *TemplateArgs); 2489 2490 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2491 LookupResult &R, 2492 bool NeedsADL); 2493 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2494 const DeclarationNameInfo &NameInfo, 2495 NamedDecl *D); 2496 2497 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2498 ExprResult ActOnNumericConstant(const Token &Tok); 2499 ExprResult ActOnCharacterConstant(const Token &Tok); 2500 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2501 ExprResult ActOnParenListExpr(SourceLocation L, 2502 SourceLocation R, 2503 MultiExprArg Val); 2504 2505 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2506 /// fragments (e.g. "foo" "bar" L"baz"). 2507 ExprResult ActOnStringLiteral(const Token *StringToks, 2508 unsigned NumStringToks); 2509 2510 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2511 SourceLocation DefaultLoc, 2512 SourceLocation RParenLoc, 2513 Expr *ControllingExpr, 2514 MultiTypeArg ArgTypes, 2515 MultiExprArg ArgExprs); 2516 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2517 SourceLocation DefaultLoc, 2518 SourceLocation RParenLoc, 2519 Expr *ControllingExpr, 2520 TypeSourceInfo **Types, 2521 Expr **Exprs, 2522 unsigned NumAssocs); 2523 2524 // Binary/Unary Operators. 'Tok' is the token for the operator. 2525 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2526 Expr *InputExpr); 2527 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2528 UnaryOperatorKind Opc, Expr *Input); 2529 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2530 tok::TokenKind Op, Expr *Input); 2531 2532 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2533 SourceLocation OpLoc, 2534 UnaryExprOrTypeTrait ExprKind, 2535 SourceRange R); 2536 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2537 UnaryExprOrTypeTrait ExprKind); 2538 ExprResult 2539 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2540 UnaryExprOrTypeTrait ExprKind, 2541 bool IsType, void *TyOrEx, 2542 const SourceRange &ArgRange); 2543 2544 ExprResult CheckPlaceholderExpr(Expr *E); 2545 bool CheckVecStepExpr(Expr *E); 2546 2547 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2548 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2549 SourceRange ExprRange, 2550 UnaryExprOrTypeTrait ExprKind); 2551 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2552 SourceLocation OpLoc, 2553 IdentifierInfo &Name, 2554 SourceLocation NameLoc, 2555 SourceLocation RParenLoc); 2556 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2557 tok::TokenKind Kind, Expr *Input); 2558 2559 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2560 Expr *Idx, SourceLocation RLoc); 2561 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2562 Expr *Idx, SourceLocation RLoc); 2563 2564 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2565 SourceLocation OpLoc, bool IsArrow, 2566 CXXScopeSpec &SS, 2567 SourceLocation TemplateKWLoc, 2568 NamedDecl *FirstQualifierInScope, 2569 const DeclarationNameInfo &NameInfo, 2570 const TemplateArgumentListInfo *TemplateArgs); 2571 2572 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2573 SourceLocation OpLoc, bool IsArrow, 2574 const CXXScopeSpec &SS, 2575 SourceLocation TemplateKWLoc, 2576 NamedDecl *FirstQualifierInScope, 2577 LookupResult &R, 2578 const TemplateArgumentListInfo *TemplateArgs, 2579 bool SuppressQualifierCheck = false); 2580 2581 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2582 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2583 bool &IsArrow, SourceLocation OpLoc, 2584 CXXScopeSpec &SS, 2585 Decl *ObjCImpDecl, 2586 bool HasTemplateArgs); 2587 2588 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2589 const CXXScopeSpec &SS, 2590 const LookupResult &R); 2591 2592 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2593 bool IsArrow, SourceLocation OpLoc, 2594 const CXXScopeSpec &SS, 2595 SourceLocation TemplateKWLoc, 2596 NamedDecl *FirstQualifierInScope, 2597 const DeclarationNameInfo &NameInfo, 2598 const TemplateArgumentListInfo *TemplateArgs); 2599 2600 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2601 SourceLocation OpLoc, 2602 tok::TokenKind OpKind, 2603 CXXScopeSpec &SS, 2604 SourceLocation TemplateKWLoc, 2605 UnqualifiedId &Member, 2606 Decl *ObjCImpDecl, 2607 bool HasTrailingLParen); 2608 2609 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2610 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2611 FunctionDecl *FDecl, 2612 const FunctionProtoType *Proto, 2613 Expr **Args, unsigned NumArgs, 2614 SourceLocation RParenLoc, 2615 bool ExecConfig = false); 2616 void CheckStaticArrayArgument(SourceLocation CallLoc, 2617 ParmVarDecl *Param, 2618 const Expr *ArgExpr); 2619 2620 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2621 /// This provides the location of the left/right parens and a list of comma 2622 /// locations. 2623 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2624 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2625 Expr *ExecConfig = 0, bool IsExecConfig = false); 2626 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2627 SourceLocation LParenLoc, 2628 Expr **Args, unsigned NumArgs, 2629 SourceLocation RParenLoc, 2630 Expr *Config = 0, 2631 bool IsExecConfig = false); 2632 2633 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2634 MultiExprArg ExecConfig, 2635 SourceLocation GGGLoc); 2636 2637 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2638 Declarator &D, ParsedType &Ty, 2639 SourceLocation RParenLoc, Expr *CastExpr); 2640 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2641 TypeSourceInfo *Ty, 2642 SourceLocation RParenLoc, 2643 Expr *Op); 2644 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2645 2646 /// \brief Build an altivec or OpenCL literal. 2647 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2648 SourceLocation RParenLoc, Expr *E, 2649 TypeSourceInfo *TInfo); 2650 2651 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2652 2653 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2654 ParsedType Ty, 2655 SourceLocation RParenLoc, 2656 Expr *InitExpr); 2657 2658 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2659 TypeSourceInfo *TInfo, 2660 SourceLocation RParenLoc, 2661 Expr *LiteralExpr); 2662 2663 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2664 MultiExprArg InitArgList, 2665 SourceLocation RBraceLoc); 2666 2667 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2668 SourceLocation Loc, 2669 bool GNUSyntax, 2670 ExprResult Init); 2671 2672 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2673 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2674 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2675 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2676 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2677 Expr *LHSExpr, Expr *RHSExpr); 2678 2679 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2680 /// in the case of a the GNU conditional expr extension. 2681 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2682 SourceLocation ColonLoc, 2683 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2684 2685 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2686 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2687 LabelDecl *TheDecl); 2688 2689 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2690 SourceLocation RPLoc); // "({..})" 2691 2692 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2693 struct OffsetOfComponent { 2694 SourceLocation LocStart, LocEnd; 2695 bool isBrackets; // true if [expr], false if .ident 2696 union { 2697 IdentifierInfo *IdentInfo; 2698 Expr *E; 2699 } U; 2700 }; 2701 2702 /// __builtin_offsetof(type, a.b[123][456].c) 2703 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2704 TypeSourceInfo *TInfo, 2705 OffsetOfComponent *CompPtr, 2706 unsigned NumComponents, 2707 SourceLocation RParenLoc); 2708 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2709 SourceLocation BuiltinLoc, 2710 SourceLocation TypeLoc, 2711 ParsedType ParsedArgTy, 2712 OffsetOfComponent *CompPtr, 2713 unsigned NumComponents, 2714 SourceLocation RParenLoc); 2715 2716 // __builtin_choose_expr(constExpr, expr1, expr2) 2717 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2718 Expr *CondExpr, Expr *LHSExpr, 2719 Expr *RHSExpr, SourceLocation RPLoc); 2720 2721 // __builtin_va_arg(expr, type) 2722 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2723 SourceLocation RPLoc); 2724 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2725 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2726 2727 // __null 2728 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2729 2730 bool CheckCaseExpression(Expr *E); 2731 2732 /// \brief Describes the result of an "if-exists" condition check. 2733 enum IfExistsResult { 2734 /// \brief The symbol exists. 2735 IER_Exists, 2736 2737 /// \brief The symbol does not exist. 2738 IER_DoesNotExist, 2739 2740 /// \brief The name is a dependent name, so the results will differ 2741 /// from one instantiation to the next. 2742 IER_Dependent, 2743 2744 /// \brief An error occurred. 2745 IER_Error 2746 }; 2747 2748 IfExistsResult 2749 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2750 const DeclarationNameInfo &TargetNameInfo); 2751 2752 IfExistsResult 2753 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2754 bool IsIfExists, CXXScopeSpec &SS, 2755 UnqualifiedId &Name); 2756 2757 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2758 bool IsIfExists, 2759 NestedNameSpecifierLoc QualifierLoc, 2760 DeclarationNameInfo NameInfo, 2761 Stmt *Nested); 2762 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2763 bool IsIfExists, 2764 CXXScopeSpec &SS, UnqualifiedId &Name, 2765 Stmt *Nested); 2766 2767 //===------------------------- "Block" Extension ------------------------===// 2768 2769 /// ActOnBlockStart - This callback is invoked when a block literal is 2770 /// started. 2771 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2772 2773 /// ActOnBlockArguments - This callback allows processing of block arguments. 2774 /// If there are no arguments, this is still invoked. 2775 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2776 2777 /// ActOnBlockError - If there is an error parsing a block, this callback 2778 /// is invoked to pop the information about the block from the action impl. 2779 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2780 2781 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2782 /// literal was successfully completed. ^(int x){...} 2783 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2784 Scope *CurScope); 2785 2786 //===---------------------------- OpenCL Features -----------------------===// 2787 2788 /// __builtin_astype(...) 2789 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2790 SourceLocation BuiltinLoc, 2791 SourceLocation RParenLoc); 2792 2793 //===---------------------------- C++ Features --------------------------===// 2794 2795 // Act on C++ namespaces 2796 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2797 SourceLocation NamespaceLoc, 2798 SourceLocation IdentLoc, 2799 IdentifierInfo *Ident, 2800 SourceLocation LBrace, 2801 AttributeList *AttrList); 2802 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2803 2804 NamespaceDecl *getStdNamespace() const; 2805 NamespaceDecl *getOrCreateStdNamespace(); 2806 2807 CXXRecordDecl *getStdBadAlloc() const; 2808 2809 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2810 /// it is and Element is not NULL, assigns the element type to Element. 2811 bool isStdInitializerList(QualType Ty, QualType *Element); 2812 2813 /// \brief Looks for the std::initializer_list template and instantiates it 2814 /// with Element, or emits an error if it's not found. 2815 /// 2816 /// \returns The instantiated template, or null on error. 2817 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2818 2819 /// \brief Determine whether Ctor is an initializer-list constructor, as 2820 /// defined in [dcl.init.list]p2. 2821 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2822 2823 Decl *ActOnUsingDirective(Scope *CurScope, 2824 SourceLocation UsingLoc, 2825 SourceLocation NamespcLoc, 2826 CXXScopeSpec &SS, 2827 SourceLocation IdentLoc, 2828 IdentifierInfo *NamespcName, 2829 AttributeList *AttrList); 2830 2831 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2832 2833 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2834 SourceLocation NamespaceLoc, 2835 SourceLocation AliasLoc, 2836 IdentifierInfo *Alias, 2837 CXXScopeSpec &SS, 2838 SourceLocation IdentLoc, 2839 IdentifierInfo *Ident); 2840 2841 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2842 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2843 const LookupResult &PreviousDecls); 2844 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2845 NamedDecl *Target); 2846 2847 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2848 bool isTypeName, 2849 const CXXScopeSpec &SS, 2850 SourceLocation NameLoc, 2851 const LookupResult &Previous); 2852 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2853 const CXXScopeSpec &SS, 2854 SourceLocation NameLoc); 2855 2856 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2857 SourceLocation UsingLoc, 2858 CXXScopeSpec &SS, 2859 const DeclarationNameInfo &NameInfo, 2860 AttributeList *AttrList, 2861 bool IsInstantiation, 2862 bool IsTypeName, 2863 SourceLocation TypenameLoc); 2864 2865 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2866 2867 Decl *ActOnUsingDeclaration(Scope *CurScope, 2868 AccessSpecifier AS, 2869 bool HasUsingKeyword, 2870 SourceLocation UsingLoc, 2871 CXXScopeSpec &SS, 2872 UnqualifiedId &Name, 2873 AttributeList *AttrList, 2874 bool IsTypeName, 2875 SourceLocation TypenameLoc); 2876 Decl *ActOnAliasDeclaration(Scope *CurScope, 2877 AccessSpecifier AS, 2878 MultiTemplateParamsArg TemplateParams, 2879 SourceLocation UsingLoc, 2880 UnqualifiedId &Name, 2881 TypeResult Type); 2882 2883 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2884 /// and sets it as the initializer for the the passed in VarDecl. 2885 bool InitializeVarWithConstructor(VarDecl *VD, 2886 CXXConstructorDecl *Constructor, 2887 MultiExprArg Exprs, 2888 bool HadMultipleCandidates); 2889 2890 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2891 /// including handling of its default argument expressions. 2892 /// 2893 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2894 ExprResult 2895 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2896 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2897 bool HadMultipleCandidates, bool RequiresZeroInit, 2898 unsigned ConstructKind, SourceRange ParenRange); 2899 2900 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2901 // the constructor can be elidable? 2902 ExprResult 2903 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2904 CXXConstructorDecl *Constructor, bool Elidable, 2905 MultiExprArg Exprs, bool HadMultipleCandidates, 2906 bool RequiresZeroInit, unsigned ConstructKind, 2907 SourceRange ParenRange); 2908 2909 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2910 /// the default expr if needed. 2911 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2912 FunctionDecl *FD, 2913 ParmVarDecl *Param); 2914 2915 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2916 /// constructed variable. 2917 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2918 2919 /// \brief Helper class that collects exception specifications for 2920 /// implicitly-declared special member functions. 2921 class ImplicitExceptionSpecification { 2922 // Pointer to allow copying 2923 ASTContext *Context; 2924 // We order exception specifications thus: 2925 // noexcept is the most restrictive, but is only used in C++0x. 2926 // throw() comes next. 2927 // Then a throw(collected exceptions) 2928 // Finally no specification. 2929 // throw(...) is used instead if any called function uses it. 2930 // 2931 // If this exception specification cannot be known yet (for instance, 2932 // because this is the exception specification for a defaulted default 2933 // constructor and we haven't finished parsing the deferred parts of the 2934 // class yet), the C++0x standard does not specify how to behave. We 2935 // record this as an 'unknown' exception specification, which overrules 2936 // any other specification (even 'none', to keep this rule simple). 2937 ExceptionSpecificationType ComputedEST; 2938 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2939 SmallVector<QualType, 4> Exceptions; 2940 2941 void ClearExceptions() { 2942 ExceptionsSeen.clear(); 2943 Exceptions.clear(); 2944 } 2945 2946 public: 2947 explicit ImplicitExceptionSpecification(ASTContext &Context) 2948 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2949 if (!Context.getLangOptions().CPlusPlus0x) 2950 ComputedEST = EST_DynamicNone; 2951 } 2952 2953 /// \brief Get the computed exception specification type. 2954 ExceptionSpecificationType getExceptionSpecType() const { 2955 assert(ComputedEST != EST_ComputedNoexcept && 2956 "noexcept(expr) should not be a possible result"); 2957 return ComputedEST; 2958 } 2959 2960 /// \brief The number of exceptions in the exception specification. 2961 unsigned size() const { return Exceptions.size(); } 2962 2963 /// \brief The set of exceptions in the exception specification. 2964 const QualType *data() const { return Exceptions.data(); } 2965 2966 /// \brief Integrate another called method into the collected data. 2967 void CalledDecl(CXXMethodDecl *Method); 2968 2969 /// \brief Integrate an invoked expression into the collected data. 2970 void CalledExpr(Expr *E); 2971 2972 /// \brief Specify that the exception specification can't be detemined yet. 2973 void SetDelayed() { 2974 ClearExceptions(); 2975 ComputedEST = EST_Delayed; 2976 } 2977 2978 FunctionProtoType::ExtProtoInfo getEPI() const { 2979 FunctionProtoType::ExtProtoInfo EPI; 2980 EPI.ExceptionSpecType = getExceptionSpecType(); 2981 EPI.NumExceptions = size(); 2982 EPI.Exceptions = data(); 2983 return EPI; 2984 } 2985 }; 2986 2987 /// \brief Determine what sort of exception specification a defaulted 2988 /// copy constructor of a class will have. 2989 ImplicitExceptionSpecification 2990 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2991 2992 /// \brief Determine what sort of exception specification a defaulted 2993 /// default constructor of a class will have, and whether the parameter 2994 /// will be const. 2995 std::pair<ImplicitExceptionSpecification, bool> 2996 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2997 2998 /// \brief Determine what sort of exception specification a defautled 2999 /// copy assignment operator of a class will have, and whether the 3000 /// parameter will be const. 3001 std::pair<ImplicitExceptionSpecification, bool> 3002 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3003 3004 /// \brief Determine what sort of exception specification a defaulted move 3005 /// constructor of a class will have. 3006 ImplicitExceptionSpecification 3007 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3008 3009 /// \brief Determine what sort of exception specification a defaulted move 3010 /// assignment operator of a class will have. 3011 ImplicitExceptionSpecification 3012 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3013 3014 /// \brief Determine what sort of exception specification a defaulted 3015 /// destructor of a class will have. 3016 ImplicitExceptionSpecification 3017 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3018 3019 /// \brief Determine if a special member function should have a deleted 3020 /// definition when it is defaulted. 3021 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 3022 3023 /// \brief Declare the implicit default constructor for the given class. 3024 /// 3025 /// \param ClassDecl The class declaration into which the implicit 3026 /// default constructor will be added. 3027 /// 3028 /// \returns The implicitly-declared default constructor. 3029 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3030 CXXRecordDecl *ClassDecl); 3031 3032 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3033 /// defining this constructor as the default constructor. 3034 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3035 CXXConstructorDecl *Constructor); 3036 3037 /// \brief Declare the implicit destructor for the given class. 3038 /// 3039 /// \param ClassDecl The class declaration into which the implicit 3040 /// destructor will be added. 3041 /// 3042 /// \returns The implicitly-declared destructor. 3043 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3044 3045 /// DefineImplicitDestructor - Checks for feasibility of 3046 /// defining this destructor as the default destructor. 3047 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3048 CXXDestructorDecl *Destructor); 3049 3050 /// \brief Build an exception spec for destructors that don't have one. 3051 /// 3052 /// C++11 says that user-defined destructors with no exception spec get one 3053 /// that looks as if the destructor was implicitly declared. 3054 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3055 CXXDestructorDecl *Destructor); 3056 3057 /// \brief Declare all inherited constructors for the given class. 3058 /// 3059 /// \param ClassDecl The class declaration into which the inherited 3060 /// constructors will be added. 3061 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3062 3063 /// \brief Declare the implicit copy constructor for the given class. 3064 /// 3065 /// \param ClassDecl The class declaration into which the implicit 3066 /// copy constructor will be added. 3067 /// 3068 /// \returns The implicitly-declared copy constructor. 3069 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3070 3071 /// DefineImplicitCopyConstructor - Checks for feasibility of 3072 /// defining this constructor as the copy constructor. 3073 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3074 CXXConstructorDecl *Constructor); 3075 3076 /// \brief Declare the implicit move constructor for the given class. 3077 /// 3078 /// \param ClassDecl The Class declaration into which the implicit 3079 /// move constructor will be added. 3080 /// 3081 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3082 /// declared. 3083 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3084 3085 /// DefineImplicitMoveConstructor - Checks for feasibility of 3086 /// defining this constructor as the move constructor. 3087 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3088 CXXConstructorDecl *Constructor); 3089 3090 /// \brief Declare the implicit copy assignment operator for the given class. 3091 /// 3092 /// \param ClassDecl The class declaration into which the implicit 3093 /// copy assignment operator will be added. 3094 /// 3095 /// \returns The implicitly-declared copy assignment operator. 3096 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3097 3098 /// \brief Defines an implicitly-declared copy assignment operator. 3099 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3100 CXXMethodDecl *MethodDecl); 3101 3102 /// \brief Declare the implicit move assignment operator for the given class. 3103 /// 3104 /// \param ClassDecl The Class declaration into which the implicit 3105 /// move assignment operator will be added. 3106 /// 3107 /// \returns The implicitly-declared move assignment operator, or NULL if it 3108 /// wasn't declared. 3109 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3110 3111 /// \brief Defines an implicitly-declared move assignment operator. 3112 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3113 CXXMethodDecl *MethodDecl); 3114 3115 /// \brief Force the declaration of any implicitly-declared members of this 3116 /// class. 3117 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3118 3119 /// \brief Determine whether the given function is an implicitly-deleted 3120 /// special member function. 3121 bool isImplicitlyDeleted(FunctionDecl *FD); 3122 3123 /// MaybeBindToTemporary - If the passed in expression has a record type with 3124 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3125 /// it simply returns the passed in expression. 3126 ExprResult MaybeBindToTemporary(Expr *E); 3127 3128 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3129 MultiExprArg ArgsPtr, 3130 SourceLocation Loc, 3131 ASTOwningVector<Expr*> &ConvertedArgs); 3132 3133 ParsedType getDestructorName(SourceLocation TildeLoc, 3134 IdentifierInfo &II, SourceLocation NameLoc, 3135 Scope *S, CXXScopeSpec &SS, 3136 ParsedType ObjectType, 3137 bool EnteringContext); 3138 3139 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3140 3141 // Checks that reinterpret casts don't have undefined behavior. 3142 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3143 bool IsDereference, SourceRange Range); 3144 3145 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3146 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3147 tok::TokenKind Kind, 3148 SourceLocation LAngleBracketLoc, 3149 Declarator &D, 3150 SourceLocation RAngleBracketLoc, 3151 SourceLocation LParenLoc, 3152 Expr *E, 3153 SourceLocation RParenLoc); 3154 3155 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3156 tok::TokenKind Kind, 3157 TypeSourceInfo *Ty, 3158 Expr *E, 3159 SourceRange AngleBrackets, 3160 SourceRange Parens); 3161 3162 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3163 SourceLocation TypeidLoc, 3164 TypeSourceInfo *Operand, 3165 SourceLocation RParenLoc); 3166 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3167 SourceLocation TypeidLoc, 3168 Expr *Operand, 3169 SourceLocation RParenLoc); 3170 3171 /// ActOnCXXTypeid - Parse typeid( something ). 3172 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3173 SourceLocation LParenLoc, bool isType, 3174 void *TyOrExpr, 3175 SourceLocation RParenLoc); 3176 3177 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3178 SourceLocation TypeidLoc, 3179 TypeSourceInfo *Operand, 3180 SourceLocation RParenLoc); 3181 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3182 SourceLocation TypeidLoc, 3183 Expr *Operand, 3184 SourceLocation RParenLoc); 3185 3186 /// ActOnCXXUuidof - Parse __uuidof( something ). 3187 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3188 SourceLocation LParenLoc, bool isType, 3189 void *TyOrExpr, 3190 SourceLocation RParenLoc); 3191 3192 3193 //// ActOnCXXThis - Parse 'this' pointer. 3194 ExprResult ActOnCXXThis(SourceLocation loc); 3195 3196 /// \brief Try to retrieve the type of the 'this' pointer. 3197 /// 3198 /// \param Capture If true, capture 'this' in this context. 3199 /// 3200 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3201 QualType getCurrentThisType(); 3202 3203 /// \brief Make sure the value of 'this' is actually available in the current 3204 /// context, if it is a potentially evaluated context. 3205 /// 3206 /// \param Loc The location at which the capture of 'this' occurs. 3207 /// 3208 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3209 /// capture list. 3210 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3211 3212 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3213 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3214 3215 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3216 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3217 3218 //// ActOnCXXThrow - Parse throw expressions. 3219 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3220 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3221 bool IsThrownVarInScope); 3222 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3223 bool IsThrownVarInScope); 3224 3225 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3226 /// Can be interpreted either as function-style casting ("int(x)") 3227 /// or class type construction ("ClassType(x,y,z)") 3228 /// or creation of a value-initialized type ("int()"). 3229 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3230 SourceLocation LParenLoc, 3231 MultiExprArg Exprs, 3232 SourceLocation RParenLoc); 3233 3234 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3235 SourceLocation LParenLoc, 3236 MultiExprArg Exprs, 3237 SourceLocation RParenLoc); 3238 3239 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3240 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3241 SourceLocation PlacementLParen, 3242 MultiExprArg PlacementArgs, 3243 SourceLocation PlacementRParen, 3244 SourceRange TypeIdParens, Declarator &D, 3245 Expr *Initializer); 3246 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3247 SourceLocation PlacementLParen, 3248 MultiExprArg PlacementArgs, 3249 SourceLocation PlacementRParen, 3250 SourceRange TypeIdParens, 3251 QualType AllocType, 3252 TypeSourceInfo *AllocTypeInfo, 3253 Expr *ArraySize, 3254 SourceRange DirectInitRange, 3255 Expr *Initializer, 3256 bool TypeMayContainAuto = true); 3257 3258 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3259 SourceRange R); 3260 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3261 bool UseGlobal, QualType AllocType, bool IsArray, 3262 Expr **PlaceArgs, unsigned NumPlaceArgs, 3263 FunctionDecl *&OperatorNew, 3264 FunctionDecl *&OperatorDelete); 3265 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3266 DeclarationName Name, Expr** Args, 3267 unsigned NumArgs, DeclContext *Ctx, 3268 bool AllowMissing, FunctionDecl *&Operator, 3269 bool Diagnose = true); 3270 void DeclareGlobalNewDelete(); 3271 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3272 QualType Argument, 3273 bool addMallocAttr = false); 3274 3275 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3276 DeclarationName Name, FunctionDecl* &Operator, 3277 bool Diagnose = true); 3278 3279 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3280 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3281 bool UseGlobal, bool ArrayForm, 3282 Expr *Operand); 3283 3284 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3285 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3286 SourceLocation StmtLoc, 3287 bool ConvertToBoolean); 3288 3289 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3290 Expr *Operand, SourceLocation RParen); 3291 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3292 SourceLocation RParen); 3293 3294 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3295 /// pseudo-functions. 3296 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3297 SourceLocation KWLoc, 3298 ParsedType Ty, 3299 SourceLocation RParen); 3300 3301 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3302 SourceLocation KWLoc, 3303 TypeSourceInfo *T, 3304 SourceLocation RParen); 3305 3306 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3307 /// pseudo-functions. 3308 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3309 SourceLocation KWLoc, 3310 ParsedType LhsTy, 3311 ParsedType RhsTy, 3312 SourceLocation RParen); 3313 3314 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3315 SourceLocation KWLoc, 3316 TypeSourceInfo *LhsT, 3317 TypeSourceInfo *RhsT, 3318 SourceLocation RParen); 3319 3320 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3321 /// pseudo-functions. 3322 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3323 SourceLocation KWLoc, 3324 ParsedType LhsTy, 3325 Expr *DimExpr, 3326 SourceLocation RParen); 3327 3328 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3329 SourceLocation KWLoc, 3330 TypeSourceInfo *TSInfo, 3331 Expr *DimExpr, 3332 SourceLocation RParen); 3333 3334 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3335 /// pseudo-functions. 3336 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3337 SourceLocation KWLoc, 3338 Expr *Queried, 3339 SourceLocation RParen); 3340 3341 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3342 SourceLocation KWLoc, 3343 Expr *Queried, 3344 SourceLocation RParen); 3345 3346 ExprResult ActOnStartCXXMemberReference(Scope *S, 3347 Expr *Base, 3348 SourceLocation OpLoc, 3349 tok::TokenKind OpKind, 3350 ParsedType &ObjectType, 3351 bool &MayBePseudoDestructor); 3352 3353 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3354 3355 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3356 SourceLocation OpLoc, 3357 tok::TokenKind OpKind, 3358 const CXXScopeSpec &SS, 3359 TypeSourceInfo *ScopeType, 3360 SourceLocation CCLoc, 3361 SourceLocation TildeLoc, 3362 PseudoDestructorTypeStorage DestroyedType, 3363 bool HasTrailingLParen); 3364 3365 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3366 SourceLocation OpLoc, 3367 tok::TokenKind OpKind, 3368 CXXScopeSpec &SS, 3369 UnqualifiedId &FirstTypeName, 3370 SourceLocation CCLoc, 3371 SourceLocation TildeLoc, 3372 UnqualifiedId &SecondTypeName, 3373 bool HasTrailingLParen); 3374 3375 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3376 SourceLocation OpLoc, 3377 tok::TokenKind OpKind, 3378 SourceLocation TildeLoc, 3379 const DeclSpec& DS, 3380 bool HasTrailingLParen); 3381 3382 /// MaybeCreateExprWithCleanups - If the current full-expression 3383 /// requires any cleanups, surround it with a ExprWithCleanups node. 3384 /// Otherwise, just returns the passed-in expression. 3385 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3386 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3387 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3388 3389 ExprResult ActOnFinishFullExpr(Expr *Expr); 3390 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3391 3392 // Marks SS invalid if it represents an incomplete type. 3393 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3394 3395 DeclContext *computeDeclContext(QualType T); 3396 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3397 bool EnteringContext = false); 3398 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3399 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3400 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3401 3402 /// \brief The parser has parsed a global nested-name-specifier '::'. 3403 /// 3404 /// \param S The scope in which this nested-name-specifier occurs. 3405 /// 3406 /// \param CCLoc The location of the '::'. 3407 /// 3408 /// \param SS The nested-name-specifier, which will be updated in-place 3409 /// to reflect the parsed nested-name-specifier. 3410 /// 3411 /// \returns true if an error occurred, false otherwise. 3412 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3413 CXXScopeSpec &SS); 3414 3415 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3416 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3417 3418 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3419 SourceLocation IdLoc, 3420 IdentifierInfo &II, 3421 ParsedType ObjectType); 3422 3423 bool BuildCXXNestedNameSpecifier(Scope *S, 3424 IdentifierInfo &Identifier, 3425 SourceLocation IdentifierLoc, 3426 SourceLocation CCLoc, 3427 QualType ObjectType, 3428 bool EnteringContext, 3429 CXXScopeSpec &SS, 3430 NamedDecl *ScopeLookupResult, 3431 bool ErrorRecoveryLookup); 3432 3433 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3434 /// 3435 /// \param S The scope in which this nested-name-specifier occurs. 3436 /// 3437 /// \param Identifier The identifier preceding the '::'. 3438 /// 3439 /// \param IdentifierLoc The location of the identifier. 3440 /// 3441 /// \param CCLoc The location of the '::'. 3442 /// 3443 /// \param ObjectType The type of the object, if we're parsing 3444 /// nested-name-specifier in a member access expression. 3445 /// 3446 /// \param EnteringContext Whether we're entering the context nominated by 3447 /// this nested-name-specifier. 3448 /// 3449 /// \param SS The nested-name-specifier, which is both an input 3450 /// parameter (the nested-name-specifier before this type) and an 3451 /// output parameter (containing the full nested-name-specifier, 3452 /// including this new type). 3453 /// 3454 /// \returns true if an error occurred, false otherwise. 3455 bool ActOnCXXNestedNameSpecifier(Scope *S, 3456 IdentifierInfo &Identifier, 3457 SourceLocation IdentifierLoc, 3458 SourceLocation CCLoc, 3459 ParsedType ObjectType, 3460 bool EnteringContext, 3461 CXXScopeSpec &SS); 3462 3463 ExprResult ActOnDecltypeExpression(Expr *E); 3464 3465 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3466 const DeclSpec &DS, 3467 SourceLocation ColonColonLoc); 3468 3469 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3470 IdentifierInfo &Identifier, 3471 SourceLocation IdentifierLoc, 3472 SourceLocation ColonLoc, 3473 ParsedType ObjectType, 3474 bool EnteringContext); 3475 3476 /// \brief The parser has parsed a nested-name-specifier 3477 /// 'template[opt] template-name < template-args >::'. 3478 /// 3479 /// \param S The scope in which this nested-name-specifier occurs. 3480 /// 3481 /// \param SS The nested-name-specifier, which is both an input 3482 /// parameter (the nested-name-specifier before this type) and an 3483 /// output parameter (containing the full nested-name-specifier, 3484 /// including this new type). 3485 /// 3486 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3487 /// \param TemplateName The template name. 3488 /// \param TemplateNameLoc The location of the template name. 3489 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3490 /// \param TemplateArgs The template arguments. 3491 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3492 /// \param CCLoc The location of the '::'. 3493 /// 3494 /// \param EnteringContext Whether we're entering the context of the 3495 /// nested-name-specifier. 3496 /// 3497 /// 3498 /// \returns true if an error occurred, false otherwise. 3499 bool ActOnCXXNestedNameSpecifier(Scope *S, 3500 CXXScopeSpec &SS, 3501 SourceLocation TemplateKWLoc, 3502 TemplateTy Template, 3503 SourceLocation TemplateNameLoc, 3504 SourceLocation LAngleLoc, 3505 ASTTemplateArgsPtr TemplateArgs, 3506 SourceLocation RAngleLoc, 3507 SourceLocation CCLoc, 3508 bool EnteringContext); 3509 3510 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3511 /// that the parser can use later to reconstruct the given 3512 /// nested-name-specifier. 3513 /// 3514 /// \param SS A nested-name-specifier. 3515 /// 3516 /// \returns A pointer containing all of the information in the 3517 /// nested-name-specifier \p SS. 3518 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3519 3520 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3521 /// the nested-name-specifier structure. 3522 /// 3523 /// \param Annotation The annotation pointer, produced by 3524 /// \c SaveNestedNameSpecifierAnnotation(). 3525 /// 3526 /// \param AnnotationRange The source range corresponding to the annotation. 3527 /// 3528 /// \param SS The nested-name-specifier that will be updated with the contents 3529 /// of the annotation pointer. 3530 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3531 SourceRange AnnotationRange, 3532 CXXScopeSpec &SS); 3533 3534 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3535 3536 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3537 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3538 /// After this method is called, according to [C++ 3.4.3p3], names should be 3539 /// looked up in the declarator-id's scope, until the declarator is parsed and 3540 /// ActOnCXXExitDeclaratorScope is called. 3541 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3542 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3543 3544 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3545 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3546 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3547 /// Used to indicate that names should revert to being looked up in the 3548 /// defining scope. 3549 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3550 3551 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3552 /// initializer for the declaration 'Dcl'. 3553 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3554 /// static data member of class X, names should be looked up in the scope of 3555 /// class X. 3556 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3557 3558 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3559 /// initializer for the declaration 'Dcl'. 3560 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3561 3562 /// \brief Create a new lambda closure type. 3563 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3564 bool KnownDependent = false); 3565 3566 /// \brief Start the definition of a lambda expression. 3567 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3568 SourceRange IntroducerRange, 3569 TypeSourceInfo *MethodType, 3570 SourceLocation EndLoc, 3571 llvm::ArrayRef<ParmVarDecl *> Params); 3572 3573 /// \brief Introduce the scope for a lambda expression. 3574 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3575 SourceRange IntroducerRange, 3576 LambdaCaptureDefault CaptureDefault, 3577 bool ExplicitParams, 3578 bool ExplicitResultType, 3579 bool Mutable); 3580 3581 /// \brief Note that we have finished the explicit captures for the 3582 /// given lambda. 3583 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3584 3585 /// \brief Introduce the lambda parameters into scope. 3586 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3587 3588 /// ActOnStartOfLambdaDefinition - This is called just before we start 3589 /// parsing the body of a lambda; it analyzes the explicit captures and 3590 /// arguments, and sets up various data-structures for the body of the 3591 /// lambda. 3592 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3593 Declarator &ParamInfo, Scope *CurScope); 3594 3595 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3596 /// is invoked to pop the information about the lambda. 3597 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3598 bool IsInstantiation = false); 3599 3600 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3601 /// was successfully completed. 3602 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3603 Scope *CurScope, 3604 llvm::Optional<unsigned> ManglingNumber 3605 = llvm::Optional<unsigned>(), 3606 Decl *ContextDecl = 0, 3607 bool IsInstantiation = false); 3608 3609 /// \brief Define the "body" of the conversion from a lambda object to a 3610 /// function pointer. 3611 /// 3612 /// This routine doesn't actually define a sensible body; rather, it fills 3613 /// in the initialization expression needed to copy the lambda object into 3614 /// the block, and IR generation actually generates the real body of the 3615 /// block pointer conversion. 3616 void DefineImplicitLambdaToFunctionPointerConversion( 3617 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3618 3619 /// \brief Define the "body" of the conversion from a lambda object to a 3620 /// block pointer. 3621 /// 3622 /// This routine doesn't actually define a sensible body; rather, it fills 3623 /// in the initialization expression needed to copy the lambda object into 3624 /// the block, and IR generation actually generates the real body of the 3625 /// block pointer conversion. 3626 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3627 CXXConversionDecl *Conv); 3628 3629 // ParseObjCStringLiteral - Parse Objective-C string literals. 3630 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3631 Expr **Strings, 3632 unsigned NumStrings); 3633 3634 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3635 TypeSourceInfo *EncodedTypeInfo, 3636 SourceLocation RParenLoc); 3637 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3638 CXXMethodDecl *Method, 3639 bool HadMultipleCandidates); 3640 3641 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3642 SourceLocation EncodeLoc, 3643 SourceLocation LParenLoc, 3644 ParsedType Ty, 3645 SourceLocation RParenLoc); 3646 3647 // ParseObjCSelectorExpression - Build selector expression for @selector 3648 ExprResult ParseObjCSelectorExpression(Selector Sel, 3649 SourceLocation AtLoc, 3650 SourceLocation SelLoc, 3651 SourceLocation LParenLoc, 3652 SourceLocation RParenLoc); 3653 3654 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3655 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3656 SourceLocation AtLoc, 3657 SourceLocation ProtoLoc, 3658 SourceLocation LParenLoc, 3659 SourceLocation RParenLoc); 3660 3661 //===--------------------------------------------------------------------===// 3662 // C++ Declarations 3663 // 3664 Decl *ActOnStartLinkageSpecification(Scope *S, 3665 SourceLocation ExternLoc, 3666 SourceLocation LangLoc, 3667 StringRef Lang, 3668 SourceLocation LBraceLoc); 3669 Decl *ActOnFinishLinkageSpecification(Scope *S, 3670 Decl *LinkageSpec, 3671 SourceLocation RBraceLoc); 3672 3673 3674 //===--------------------------------------------------------------------===// 3675 // C++ Classes 3676 // 3677 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3678 const CXXScopeSpec *SS = 0); 3679 3680 bool ActOnAccessSpecifier(AccessSpecifier Access, 3681 SourceLocation ASLoc, 3682 SourceLocation ColonLoc, 3683 AttributeList *Attrs = 0); 3684 3685 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3686 Declarator &D, 3687 MultiTemplateParamsArg TemplateParameterLists, 3688 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3689 bool HasDeferredInit); 3690 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3691 Expr *Init); 3692 3693 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3694 Scope *S, 3695 CXXScopeSpec &SS, 3696 IdentifierInfo *MemberOrBase, 3697 ParsedType TemplateTypeTy, 3698 const DeclSpec &DS, 3699 SourceLocation IdLoc, 3700 SourceLocation LParenLoc, 3701 Expr **Args, unsigned NumArgs, 3702 SourceLocation RParenLoc, 3703 SourceLocation EllipsisLoc); 3704 3705 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3706 Scope *S, 3707 CXXScopeSpec &SS, 3708 IdentifierInfo *MemberOrBase, 3709 ParsedType TemplateTypeTy, 3710 const DeclSpec &DS, 3711 SourceLocation IdLoc, 3712 Expr *InitList, 3713 SourceLocation EllipsisLoc); 3714 3715 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3716 Scope *S, 3717 CXXScopeSpec &SS, 3718 IdentifierInfo *MemberOrBase, 3719 ParsedType TemplateTypeTy, 3720 const DeclSpec &DS, 3721 SourceLocation IdLoc, 3722 Expr *Init, 3723 SourceLocation EllipsisLoc); 3724 3725 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3726 Expr *Init, 3727 SourceLocation IdLoc); 3728 3729 MemInitResult BuildBaseInitializer(QualType BaseType, 3730 TypeSourceInfo *BaseTInfo, 3731 Expr *Init, 3732 CXXRecordDecl *ClassDecl, 3733 SourceLocation EllipsisLoc); 3734 3735 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3736 Expr *Init, 3737 CXXRecordDecl *ClassDecl); 3738 3739 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3740 CXXCtorInitializer *Initializer); 3741 3742 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3743 CXXCtorInitializer **Initializers, 3744 unsigned NumInitializers, bool AnyErrors); 3745 3746 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3747 3748 3749 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3750 /// mark all the non-trivial destructors of its members and bases as 3751 /// referenced. 3752 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3753 CXXRecordDecl *Record); 3754 3755 /// \brief The list of classes whose vtables have been used within 3756 /// this translation unit, and the source locations at which the 3757 /// first use occurred. 3758 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3759 3760 /// \brief The list of vtables that are required but have not yet been 3761 /// materialized. 3762 SmallVector<VTableUse, 16> VTableUses; 3763 3764 /// \brief The set of classes whose vtables have been used within 3765 /// this translation unit, and a bit that will be true if the vtable is 3766 /// required to be emitted (otherwise, it should be emitted only if needed 3767 /// by code generation). 3768 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3769 3770 /// \brief Load any externally-stored vtable uses. 3771 void LoadExternalVTableUses(); 3772 3773 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3774 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3775 DynamicClassesType; 3776 3777 /// \brief A list of all of the dynamic classes in this translation 3778 /// unit. 3779 DynamicClassesType DynamicClasses; 3780 3781 /// \brief Note that the vtable for the given class was used at the 3782 /// given location. 3783 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3784 bool DefinitionRequired = false); 3785 3786 /// MarkVirtualMembersReferenced - Will mark all members of the given 3787 /// CXXRecordDecl referenced. 3788 void MarkVirtualMembersReferenced(SourceLocation Loc, 3789 const CXXRecordDecl *RD); 3790 3791 /// \brief Define all of the vtables that have been used in this 3792 /// translation unit and reference any virtual members used by those 3793 /// vtables. 3794 /// 3795 /// \returns true if any work was done, false otherwise. 3796 bool DefineUsedVTables(); 3797 3798 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3799 3800 void ActOnMemInitializers(Decl *ConstructorDecl, 3801 SourceLocation ColonLoc, 3802 CXXCtorInitializer **MemInits, 3803 unsigned NumMemInits, 3804 bool AnyErrors); 3805 3806 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3807 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3808 Decl *TagDecl, 3809 SourceLocation LBrac, 3810 SourceLocation RBrac, 3811 AttributeList *AttrList); 3812 3813 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3814 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3815 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3816 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3817 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3818 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3819 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3820 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3821 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3822 bool IsInsideALocalClassWithinATemplateFunction(); 3823 3824 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3825 Expr *AssertExpr, 3826 Expr *AssertMessageExpr, 3827 SourceLocation RParenLoc); 3828 3829 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3830 SourceLocation FriendLoc, 3831 TypeSourceInfo *TSInfo); 3832 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3833 MultiTemplateParamsArg TemplateParams); 3834 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3835 MultiTemplateParamsArg TemplateParams); 3836 3837 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3838 StorageClass& SC); 3839 void CheckConstructor(CXXConstructorDecl *Constructor); 3840 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3841 StorageClass& SC); 3842 bool CheckDestructor(CXXDestructorDecl *Destructor); 3843 void CheckConversionDeclarator(Declarator &D, QualType &R, 3844 StorageClass& SC); 3845 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3846 3847 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3848 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3849 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3850 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3851 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3852 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3853 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3854 3855 //===--------------------------------------------------------------------===// 3856 // C++ Derived Classes 3857 // 3858 3859 /// ActOnBaseSpecifier - Parsed a base specifier 3860 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3861 SourceRange SpecifierRange, 3862 bool Virtual, AccessSpecifier Access, 3863 TypeSourceInfo *TInfo, 3864 SourceLocation EllipsisLoc); 3865 3866 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3867 SourceRange SpecifierRange, 3868 bool Virtual, AccessSpecifier Access, 3869 ParsedType basetype, 3870 SourceLocation BaseLoc, 3871 SourceLocation EllipsisLoc); 3872 3873 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3874 unsigned NumBases); 3875 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3876 unsigned NumBases); 3877 3878 bool IsDerivedFrom(QualType Derived, QualType Base); 3879 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3880 3881 // FIXME: I don't like this name. 3882 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3883 3884 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3885 3886 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3887 SourceLocation Loc, SourceRange Range, 3888 CXXCastPath *BasePath = 0, 3889 bool IgnoreAccess = false); 3890 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3891 unsigned InaccessibleBaseID, 3892 unsigned AmbigiousBaseConvID, 3893 SourceLocation Loc, SourceRange Range, 3894 DeclarationName Name, 3895 CXXCastPath *BasePath); 3896 3897 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3898 3899 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3900 /// covariant, according to C++ [class.virtual]p5. 3901 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3902 const CXXMethodDecl *Old); 3903 3904 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3905 /// spec is a subset of base spec. 3906 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3907 const CXXMethodDecl *Old); 3908 3909 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3910 3911 /// CheckOverrideControl - Check C++0x override control semantics. 3912 void CheckOverrideControl(const Decl *D); 3913 3914 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3915 /// overrides a virtual member function marked 'final', according to 3916 /// C++0x [class.virtual]p3. 3917 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3918 const CXXMethodDecl *Old); 3919 3920 3921 //===--------------------------------------------------------------------===// 3922 // C++ Access Control 3923 // 3924 3925 enum AccessResult { 3926 AR_accessible, 3927 AR_inaccessible, 3928 AR_dependent, 3929 AR_delayed 3930 }; 3931 3932 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3933 NamedDecl *PrevMemberDecl, 3934 AccessSpecifier LexicalAS); 3935 3936 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3937 DeclAccessPair FoundDecl); 3938 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3939 DeclAccessPair FoundDecl); 3940 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3941 SourceRange PlacementRange, 3942 CXXRecordDecl *NamingClass, 3943 DeclAccessPair FoundDecl, 3944 bool Diagnose = true); 3945 AccessResult CheckConstructorAccess(SourceLocation Loc, 3946 CXXConstructorDecl *D, 3947 const InitializedEntity &Entity, 3948 AccessSpecifier Access, 3949 bool IsCopyBindingRefToTemp = false); 3950 AccessResult CheckConstructorAccess(SourceLocation Loc, 3951 CXXConstructorDecl *D, 3952 AccessSpecifier Access, 3953 PartialDiagnostic PD); 3954 AccessResult CheckDestructorAccess(SourceLocation Loc, 3955 CXXDestructorDecl *Dtor, 3956 const PartialDiagnostic &PDiag); 3957 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3958 NamedDecl *D, 3959 const PartialDiagnostic &PDiag); 3960 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3961 Expr *ObjectExpr, 3962 Expr *ArgExpr, 3963 DeclAccessPair FoundDecl); 3964 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3965 DeclAccessPair FoundDecl); 3966 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3967 QualType Base, QualType Derived, 3968 const CXXBasePath &Path, 3969 unsigned DiagID, 3970 bool ForceCheck = false, 3971 bool ForceUnprivileged = false); 3972 void CheckLookupAccess(const LookupResult &R); 3973 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3974 3975 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3976 const MultiLevelTemplateArgumentList &TemplateArgs); 3977 void PerformDependentDiagnostics(const DeclContext *Pattern, 3978 const MultiLevelTemplateArgumentList &TemplateArgs); 3979 3980 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3981 3982 /// A flag to suppress access checking. 3983 bool SuppressAccessChecking; 3984 3985 /// \brief When true, access checking violations are treated as SFINAE 3986 /// failures rather than hard errors. 3987 bool AccessCheckingSFINAE; 3988 3989 void ActOnStartSuppressingAccessChecks(); 3990 void ActOnStopSuppressingAccessChecks(); 3991 3992 enum AbstractDiagSelID { 3993 AbstractNone = -1, 3994 AbstractReturnType, 3995 AbstractParamType, 3996 AbstractVariableType, 3997 AbstractFieldType, 3998 AbstractArrayType 3999 }; 4000 4001 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4002 const PartialDiagnostic &PD); 4003 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4004 4005 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4006 AbstractDiagSelID SelID = AbstractNone); 4007 4008 //===--------------------------------------------------------------------===// 4009 // C++ Overloaded Operators [C++ 13.5] 4010 // 4011 4012 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4013 4014 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4015 4016 //===--------------------------------------------------------------------===// 4017 // C++ Templates [C++ 14] 4018 // 4019 void FilterAcceptableTemplateNames(LookupResult &R); 4020 bool hasAnyAcceptableTemplateNames(LookupResult &R); 4021 4022 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4023 QualType ObjectType, bool EnteringContext, 4024 bool &MemberOfUnknownSpecialization); 4025 4026 TemplateNameKind isTemplateName(Scope *S, 4027 CXXScopeSpec &SS, 4028 bool hasTemplateKeyword, 4029 UnqualifiedId &Name, 4030 ParsedType ObjectType, 4031 bool EnteringContext, 4032 TemplateTy &Template, 4033 bool &MemberOfUnknownSpecialization); 4034 4035 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4036 SourceLocation IILoc, 4037 Scope *S, 4038 const CXXScopeSpec *SS, 4039 TemplateTy &SuggestedTemplate, 4040 TemplateNameKind &SuggestedKind); 4041 4042 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4043 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4044 4045 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4046 SourceLocation EllipsisLoc, 4047 SourceLocation KeyLoc, 4048 IdentifierInfo *ParamName, 4049 SourceLocation ParamNameLoc, 4050 unsigned Depth, unsigned Position, 4051 SourceLocation EqualLoc, 4052 ParsedType DefaultArg); 4053 4054 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4055 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4056 unsigned Depth, 4057 unsigned Position, 4058 SourceLocation EqualLoc, 4059 Expr *DefaultArg); 4060 Decl *ActOnTemplateTemplateParameter(Scope *S, 4061 SourceLocation TmpLoc, 4062 TemplateParameterList *Params, 4063 SourceLocation EllipsisLoc, 4064 IdentifierInfo *ParamName, 4065 SourceLocation ParamNameLoc, 4066 unsigned Depth, 4067 unsigned Position, 4068 SourceLocation EqualLoc, 4069 ParsedTemplateArgument DefaultArg); 4070 4071 TemplateParameterList * 4072 ActOnTemplateParameterList(unsigned Depth, 4073 SourceLocation ExportLoc, 4074 SourceLocation TemplateLoc, 4075 SourceLocation LAngleLoc, 4076 Decl **Params, unsigned NumParams, 4077 SourceLocation RAngleLoc); 4078 4079 /// \brief The context in which we are checking a template parameter 4080 /// list. 4081 enum TemplateParamListContext { 4082 TPC_ClassTemplate, 4083 TPC_FunctionTemplate, 4084 TPC_ClassTemplateMember, 4085 TPC_FriendFunctionTemplate, 4086 TPC_FriendFunctionTemplateDefinition, 4087 TPC_TypeAliasTemplate 4088 }; 4089 4090 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4091 TemplateParameterList *OldParams, 4092 TemplateParamListContext TPC); 4093 TemplateParameterList * 4094 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4095 SourceLocation DeclLoc, 4096 const CXXScopeSpec &SS, 4097 TemplateParameterList **ParamLists, 4098 unsigned NumParamLists, 4099 bool IsFriend, 4100 bool &IsExplicitSpecialization, 4101 bool &Invalid); 4102 4103 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4104 SourceLocation KWLoc, CXXScopeSpec &SS, 4105 IdentifierInfo *Name, SourceLocation NameLoc, 4106 AttributeList *Attr, 4107 TemplateParameterList *TemplateParams, 4108 AccessSpecifier AS, 4109 SourceLocation ModulePrivateLoc, 4110 unsigned NumOuterTemplateParamLists, 4111 TemplateParameterList **OuterTemplateParamLists); 4112 4113 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4114 TemplateArgumentListInfo &Out); 4115 4116 void NoteAllFoundTemplates(TemplateName Name); 4117 4118 QualType CheckTemplateIdType(TemplateName Template, 4119 SourceLocation TemplateLoc, 4120 TemplateArgumentListInfo &TemplateArgs); 4121 4122 TypeResult 4123 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4124 TemplateTy Template, SourceLocation TemplateLoc, 4125 SourceLocation LAngleLoc, 4126 ASTTemplateArgsPtr TemplateArgs, 4127 SourceLocation RAngleLoc, 4128 bool IsCtorOrDtorName = false); 4129 4130 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4131 /// such as \c class T::template apply<U>. 4132 /// 4133 /// \param TUK 4134 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4135 TypeSpecifierType TagSpec, 4136 SourceLocation TagLoc, 4137 CXXScopeSpec &SS, 4138 SourceLocation TemplateKWLoc, 4139 TemplateTy TemplateD, 4140 SourceLocation TemplateLoc, 4141 SourceLocation LAngleLoc, 4142 ASTTemplateArgsPtr TemplateArgsIn, 4143 SourceLocation RAngleLoc); 4144 4145 4146 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4147 SourceLocation TemplateKWLoc, 4148 LookupResult &R, 4149 bool RequiresADL, 4150 const TemplateArgumentListInfo *TemplateArgs); 4151 4152 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4153 SourceLocation TemplateKWLoc, 4154 const DeclarationNameInfo &NameInfo, 4155 const TemplateArgumentListInfo *TemplateArgs); 4156 4157 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4158 CXXScopeSpec &SS, 4159 SourceLocation TemplateKWLoc, 4160 UnqualifiedId &Name, 4161 ParsedType ObjectType, 4162 bool EnteringContext, 4163 TemplateTy &Template); 4164 4165 DeclResult 4166 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4167 SourceLocation KWLoc, 4168 SourceLocation ModulePrivateLoc, 4169 CXXScopeSpec &SS, 4170 TemplateTy Template, 4171 SourceLocation TemplateNameLoc, 4172 SourceLocation LAngleLoc, 4173 ASTTemplateArgsPtr TemplateArgs, 4174 SourceLocation RAngleLoc, 4175 AttributeList *Attr, 4176 MultiTemplateParamsArg TemplateParameterLists); 4177 4178 Decl *ActOnTemplateDeclarator(Scope *S, 4179 MultiTemplateParamsArg TemplateParameterLists, 4180 Declarator &D); 4181 4182 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4183 MultiTemplateParamsArg TemplateParameterLists, 4184 Declarator &D); 4185 4186 bool 4187 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4188 TemplateSpecializationKind NewTSK, 4189 NamedDecl *PrevDecl, 4190 TemplateSpecializationKind PrevTSK, 4191 SourceLocation PrevPtOfInstantiation, 4192 bool &SuppressNew); 4193 4194 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4195 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4196 LookupResult &Previous); 4197 4198 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4199 TemplateArgumentListInfo *ExplicitTemplateArgs, 4200 LookupResult &Previous); 4201 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4202 4203 DeclResult 4204 ActOnExplicitInstantiation(Scope *S, 4205 SourceLocation ExternLoc, 4206 SourceLocation TemplateLoc, 4207 unsigned TagSpec, 4208 SourceLocation KWLoc, 4209 const CXXScopeSpec &SS, 4210 TemplateTy Template, 4211 SourceLocation TemplateNameLoc, 4212 SourceLocation LAngleLoc, 4213 ASTTemplateArgsPtr TemplateArgs, 4214 SourceLocation RAngleLoc, 4215 AttributeList *Attr); 4216 4217 DeclResult 4218 ActOnExplicitInstantiation(Scope *S, 4219 SourceLocation ExternLoc, 4220 SourceLocation TemplateLoc, 4221 unsigned TagSpec, 4222 SourceLocation KWLoc, 4223 CXXScopeSpec &SS, 4224 IdentifierInfo *Name, 4225 SourceLocation NameLoc, 4226 AttributeList *Attr); 4227 4228 DeclResult ActOnExplicitInstantiation(Scope *S, 4229 SourceLocation ExternLoc, 4230 SourceLocation TemplateLoc, 4231 Declarator &D); 4232 4233 TemplateArgumentLoc 4234 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4235 SourceLocation TemplateLoc, 4236 SourceLocation RAngleLoc, 4237 Decl *Param, 4238 SmallVectorImpl<TemplateArgument> &Converted); 4239 4240 /// \brief Specifies the context in which a particular template 4241 /// argument is being checked. 4242 enum CheckTemplateArgumentKind { 4243 /// \brief The template argument was specified in the code or was 4244 /// instantiated with some deduced template arguments. 4245 CTAK_Specified, 4246 4247 /// \brief The template argument was deduced via template argument 4248 /// deduction. 4249 CTAK_Deduced, 4250 4251 /// \brief The template argument was deduced from an array bound 4252 /// via template argument deduction. 4253 CTAK_DeducedFromArrayBound 4254 }; 4255 4256 bool CheckTemplateArgument(NamedDecl *Param, 4257 const TemplateArgumentLoc &Arg, 4258 NamedDecl *Template, 4259 SourceLocation TemplateLoc, 4260 SourceLocation RAngleLoc, 4261 unsigned ArgumentPackIndex, 4262 SmallVectorImpl<TemplateArgument> &Converted, 4263 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4264 4265 /// \brief Check that the given template arguments can be be provided to 4266 /// the given template, converting the arguments along the way. 4267 /// 4268 /// \param Template The template to which the template arguments are being 4269 /// provided. 4270 /// 4271 /// \param TemplateLoc The location of the template name in the source. 4272 /// 4273 /// \param TemplateArgs The list of template arguments. If the template is 4274 /// a template template parameter, this function may extend the set of 4275 /// template arguments to also include substituted, defaulted template 4276 /// arguments. 4277 /// 4278 /// \param PartialTemplateArgs True if the list of template arguments is 4279 /// intentionally partial, e.g., because we're checking just the initial 4280 /// set of template arguments. 4281 /// 4282 /// \param Converted Will receive the converted, canonicalized template 4283 /// arguments. 4284 /// 4285 /// 4286 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4287 /// when the template arguments contain a pack expansion that is being 4288 /// expanded into a fixed parameter list. 4289 /// 4290 /// \returns True if an error occurred, false otherwise. 4291 bool CheckTemplateArgumentList(TemplateDecl *Template, 4292 SourceLocation TemplateLoc, 4293 TemplateArgumentListInfo &TemplateArgs, 4294 bool PartialTemplateArgs, 4295 SmallVectorImpl<TemplateArgument> &Converted, 4296 bool *ExpansionIntoFixedList = 0); 4297 4298 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4299 const TemplateArgumentLoc &Arg, 4300 SmallVectorImpl<TemplateArgument> &Converted); 4301 4302 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4303 TypeSourceInfo *Arg); 4304 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4305 TemplateArgument &Converted); 4306 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4307 QualType InstantiatedParamType, Expr *Arg, 4308 TemplateArgument &Converted, 4309 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4310 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4311 const TemplateArgumentLoc &Arg); 4312 4313 ExprResult 4314 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4315 QualType ParamType, 4316 SourceLocation Loc); 4317 ExprResult 4318 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4319 SourceLocation Loc); 4320 4321 /// \brief Enumeration describing how template parameter lists are compared 4322 /// for equality. 4323 enum TemplateParameterListEqualKind { 4324 /// \brief We are matching the template parameter lists of two templates 4325 /// that might be redeclarations. 4326 /// 4327 /// \code 4328 /// template<typename T> struct X; 4329 /// template<typename T> struct X; 4330 /// \endcode 4331 TPL_TemplateMatch, 4332 4333 /// \brief We are matching the template parameter lists of two template 4334 /// template parameters as part of matching the template parameter lists 4335 /// of two templates that might be redeclarations. 4336 /// 4337 /// \code 4338 /// template<template<int I> class TT> struct X; 4339 /// template<template<int Value> class Other> struct X; 4340 /// \endcode 4341 TPL_TemplateTemplateParmMatch, 4342 4343 /// \brief We are matching the template parameter lists of a template 4344 /// template argument against the template parameter lists of a template 4345 /// template parameter. 4346 /// 4347 /// \code 4348 /// template<template<int Value> class Metafun> struct X; 4349 /// template<int Value> struct integer_c; 4350 /// X<integer_c> xic; 4351 /// \endcode 4352 TPL_TemplateTemplateArgumentMatch 4353 }; 4354 4355 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4356 TemplateParameterList *Old, 4357 bool Complain, 4358 TemplateParameterListEqualKind Kind, 4359 SourceLocation TemplateArgLoc 4360 = SourceLocation()); 4361 4362 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4363 4364 /// \brief Called when the parser has parsed a C++ typename 4365 /// specifier, e.g., "typename T::type". 4366 /// 4367 /// \param S The scope in which this typename type occurs. 4368 /// \param TypenameLoc the location of the 'typename' keyword 4369 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4370 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4371 /// \param IdLoc the location of the identifier. 4372 TypeResult 4373 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4374 const CXXScopeSpec &SS, const IdentifierInfo &II, 4375 SourceLocation IdLoc); 4376 4377 /// \brief Called when the parser has parsed a C++ typename 4378 /// specifier that ends in a template-id, e.g., 4379 /// "typename MetaFun::template apply<T1, T2>". 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 TemplateLoc the location of the 'template' keyword, if any. 4385 /// \param TemplateName The template name. 4386 /// \param TemplateNameLoc The location of the template name. 4387 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4388 /// \param TemplateArgs The template arguments. 4389 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4390 TypeResult 4391 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4392 const CXXScopeSpec &SS, 4393 SourceLocation TemplateLoc, 4394 TemplateTy Template, 4395 SourceLocation TemplateNameLoc, 4396 SourceLocation LAngleLoc, 4397 ASTTemplateArgsPtr TemplateArgs, 4398 SourceLocation RAngleLoc); 4399 4400 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4401 SourceLocation KeywordLoc, 4402 NestedNameSpecifierLoc QualifierLoc, 4403 const IdentifierInfo &II, 4404 SourceLocation IILoc); 4405 4406 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4407 SourceLocation Loc, 4408 DeclarationName Name); 4409 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4410 4411 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4412 bool RebuildTemplateParamsInCurrentInstantiation( 4413 TemplateParameterList *Params); 4414 4415 std::string 4416 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4417 const TemplateArgumentList &Args); 4418 4419 std::string 4420 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4421 const TemplateArgument *Args, 4422 unsigned NumArgs); 4423 4424 //===--------------------------------------------------------------------===// 4425 // C++ Variadic Templates (C++0x [temp.variadic]) 4426 //===--------------------------------------------------------------------===// 4427 4428 /// \brief The context in which an unexpanded parameter pack is 4429 /// being diagnosed. 4430 /// 4431 /// Note that the values of this enumeration line up with the first 4432 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4433 enum UnexpandedParameterPackContext { 4434 /// \brief An arbitrary expression. 4435 UPPC_Expression = 0, 4436 4437 /// \brief The base type of a class type. 4438 UPPC_BaseType, 4439 4440 /// \brief The type of an arbitrary declaration. 4441 UPPC_DeclarationType, 4442 4443 /// \brief The type of a data member. 4444 UPPC_DataMemberType, 4445 4446 /// \brief The size of a bit-field. 4447 UPPC_BitFieldWidth, 4448 4449 /// \brief The expression in a static assertion. 4450 UPPC_StaticAssertExpression, 4451 4452 /// \brief The fixed underlying type of an enumeration. 4453 UPPC_FixedUnderlyingType, 4454 4455 /// \brief The enumerator value. 4456 UPPC_EnumeratorValue, 4457 4458 /// \brief A using declaration. 4459 UPPC_UsingDeclaration, 4460 4461 /// \brief A friend declaration. 4462 UPPC_FriendDeclaration, 4463 4464 /// \brief A declaration qualifier. 4465 UPPC_DeclarationQualifier, 4466 4467 /// \brief An initializer. 4468 UPPC_Initializer, 4469 4470 /// \brief A default argument. 4471 UPPC_DefaultArgument, 4472 4473 /// \brief The type of a non-type template parameter. 4474 UPPC_NonTypeTemplateParameterType, 4475 4476 /// \brief The type of an exception. 4477 UPPC_ExceptionType, 4478 4479 /// \brief Partial specialization. 4480 UPPC_PartialSpecialization, 4481 4482 /// \brief Microsoft __if_exists. 4483 UPPC_IfExists, 4484 4485 /// \brief Microsoft __if_not_exists. 4486 UPPC_IfNotExists 4487}; 4488 4489 /// \brief Diagnose unexpanded parameter packs. 4490 /// 4491 /// \param Loc The location at which we should emit the diagnostic. 4492 /// 4493 /// \param UPPC The context in which we are diagnosing unexpanded 4494 /// parameter packs. 4495 /// 4496 /// \param Unexpanded the set of unexpanded parameter packs. 4497 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4498 UnexpandedParameterPackContext UPPC, 4499 ArrayRef<UnexpandedParameterPack> Unexpanded); 4500 4501 /// \brief If the given type contains an unexpanded parameter pack, 4502 /// diagnose the error. 4503 /// 4504 /// \param Loc The source location where a diagnostc should be emitted. 4505 /// 4506 /// \param T The type that is being checked for unexpanded parameter 4507 /// packs. 4508 /// 4509 /// \returns true if an error occurred, false otherwise. 4510 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4511 UnexpandedParameterPackContext UPPC); 4512 4513 /// \brief If the given expression contains an unexpanded parameter 4514 /// pack, diagnose the error. 4515 /// 4516 /// \param E The expression that is being checked for unexpanded 4517 /// parameter packs. 4518 /// 4519 /// \returns true if an error occurred, false otherwise. 4520 bool DiagnoseUnexpandedParameterPack(Expr *E, 4521 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4522 4523 /// \brief If the given nested-name-specifier contains an unexpanded 4524 /// parameter pack, diagnose the error. 4525 /// 4526 /// \param SS The nested-name-specifier that is being checked for 4527 /// unexpanded parameter packs. 4528 /// 4529 /// \returns true if an error occurred, false otherwise. 4530 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4531 UnexpandedParameterPackContext UPPC); 4532 4533 /// \brief If the given name contains an unexpanded parameter pack, 4534 /// diagnose the error. 4535 /// 4536 /// \param NameInfo The name (with source location information) that 4537 /// is being checked for unexpanded parameter packs. 4538 /// 4539 /// \returns true if an error occurred, false otherwise. 4540 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4541 UnexpandedParameterPackContext UPPC); 4542 4543 /// \brief If the given template name contains an unexpanded parameter pack, 4544 /// diagnose the error. 4545 /// 4546 /// \param Loc The location of the template name. 4547 /// 4548 /// \param Template The template name that is being checked for unexpanded 4549 /// parameter packs. 4550 /// 4551 /// \returns true if an error occurred, false otherwise. 4552 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4553 TemplateName Template, 4554 UnexpandedParameterPackContext UPPC); 4555 4556 /// \brief If the given template argument contains an unexpanded parameter 4557 /// pack, diagnose the error. 4558 /// 4559 /// \param Arg The template argument that is being checked for unexpanded 4560 /// parameter packs. 4561 /// 4562 /// \returns true if an error occurred, false otherwise. 4563 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4564 UnexpandedParameterPackContext UPPC); 4565 4566 /// \brief Collect the set of unexpanded parameter packs within the given 4567 /// template argument. 4568 /// 4569 /// \param Arg The template argument that will be traversed to find 4570 /// unexpanded parameter packs. 4571 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4572 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4573 4574 /// \brief Collect the set of unexpanded parameter packs within the given 4575 /// template argument. 4576 /// 4577 /// \param Arg The template argument that will be traversed to find 4578 /// unexpanded parameter packs. 4579 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4580 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4581 4582 /// \brief Collect the set of unexpanded parameter packs within the given 4583 /// type. 4584 /// 4585 /// \param T The type that will be traversed to find 4586 /// unexpanded parameter packs. 4587 void collectUnexpandedParameterPacks(QualType T, 4588 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4589 4590 /// \brief Collect the set of unexpanded parameter packs within the given 4591 /// type. 4592 /// 4593 /// \param TL The type that will be traversed to find 4594 /// unexpanded parameter packs. 4595 void collectUnexpandedParameterPacks(TypeLoc TL, 4596 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4597 4598 /// \brief Collect the set of unexpanded parameter packs within the given 4599 /// nested-name-specifier. 4600 /// 4601 /// \param SS The nested-name-specifier that will be traversed to find 4602 /// unexpanded parameter packs. 4603 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4604 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4605 4606 /// \brief Collect the set of unexpanded parameter packs within the given 4607 /// name. 4608 /// 4609 /// \param NameInfo The name that will be traversed to find 4610 /// unexpanded parameter packs. 4611 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4612 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4613 4614 /// \brief Invoked when parsing a template argument followed by an 4615 /// ellipsis, which creates a pack expansion. 4616 /// 4617 /// \param Arg The template argument preceding the ellipsis, which 4618 /// may already be invalid. 4619 /// 4620 /// \param EllipsisLoc The location of the ellipsis. 4621 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4622 SourceLocation EllipsisLoc); 4623 4624 /// \brief Invoked when parsing a type followed by an ellipsis, which 4625 /// creates a pack expansion. 4626 /// 4627 /// \param Type The type preceding the ellipsis, which will become 4628 /// the pattern of the pack expansion. 4629 /// 4630 /// \param EllipsisLoc The location of the ellipsis. 4631 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4632 4633 /// \brief Construct a pack expansion type from the pattern of the pack 4634 /// expansion. 4635 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4636 SourceLocation EllipsisLoc, 4637 llvm::Optional<unsigned> NumExpansions); 4638 4639 /// \brief Construct a pack expansion type from the pattern of the pack 4640 /// expansion. 4641 QualType CheckPackExpansion(QualType Pattern, 4642 SourceRange PatternRange, 4643 SourceLocation EllipsisLoc, 4644 llvm::Optional<unsigned> NumExpansions); 4645 4646 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4647 /// creates a pack expansion. 4648 /// 4649 /// \param Pattern The expression preceding the ellipsis, which will become 4650 /// the pattern of the pack expansion. 4651 /// 4652 /// \param EllipsisLoc The location of the ellipsis. 4653 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4654 4655 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4656 /// creates a pack expansion. 4657 /// 4658 /// \param Pattern The expression preceding the ellipsis, which will become 4659 /// the pattern of the pack expansion. 4660 /// 4661 /// \param EllipsisLoc The location of the ellipsis. 4662 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4663 llvm::Optional<unsigned> NumExpansions); 4664 4665 /// \brief Determine whether we could expand a pack expansion with the 4666 /// given set of parameter packs into separate arguments by repeatedly 4667 /// transforming the pattern. 4668 /// 4669 /// \param EllipsisLoc The location of the ellipsis that identifies the 4670 /// pack expansion. 4671 /// 4672 /// \param PatternRange The source range that covers the entire pattern of 4673 /// the pack expansion. 4674 /// 4675 /// \param Unexpanded The set of unexpanded parameter packs within the 4676 /// pattern. 4677 /// 4678 /// \param NumUnexpanded The number of unexpanded parameter packs in 4679 /// \p Unexpanded. 4680 /// 4681 /// \param ShouldExpand Will be set to \c true if the transformer should 4682 /// expand the corresponding pack expansions into separate arguments. When 4683 /// set, \c NumExpansions must also be set. 4684 /// 4685 /// \param RetainExpansion Whether the caller should add an unexpanded 4686 /// pack expansion after all of the expanded arguments. This is used 4687 /// when extending explicitly-specified template argument packs per 4688 /// C++0x [temp.arg.explicit]p9. 4689 /// 4690 /// \param NumExpansions The number of separate arguments that will be in 4691 /// the expanded form of the corresponding pack expansion. This is both an 4692 /// input and an output parameter, which can be set by the caller if the 4693 /// number of expansions is known a priori (e.g., due to a prior substitution) 4694 /// and will be set by the callee when the number of expansions is known. 4695 /// The callee must set this value when \c ShouldExpand is \c true; it may 4696 /// set this value in other cases. 4697 /// 4698 /// \returns true if an error occurred (e.g., because the parameter packs 4699 /// are to be instantiated with arguments of different lengths), false 4700 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4701 /// must be set. 4702 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4703 SourceRange PatternRange, 4704 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4705 const MultiLevelTemplateArgumentList &TemplateArgs, 4706 bool &ShouldExpand, 4707 bool &RetainExpansion, 4708 llvm::Optional<unsigned> &NumExpansions); 4709 4710 /// \brief Determine the number of arguments in the given pack expansion 4711 /// type. 4712 /// 4713 /// This routine already assumes that the pack expansion type can be 4714 /// expanded and that the number of arguments in the expansion is 4715 /// consistent across all of the unexpanded parameter packs in its pattern. 4716 unsigned getNumArgumentsInExpansion(QualType T, 4717 const MultiLevelTemplateArgumentList &TemplateArgs); 4718 4719 /// \brief Determine whether the given declarator contains any unexpanded 4720 /// parameter packs. 4721 /// 4722 /// This routine is used by the parser to disambiguate function declarators 4723 /// with an ellipsis prior to the ')', e.g., 4724 /// 4725 /// \code 4726 /// void f(T...); 4727 /// \endcode 4728 /// 4729 /// To determine whether we have an (unnamed) function parameter pack or 4730 /// a variadic function. 4731 /// 4732 /// \returns true if the declarator contains any unexpanded parameter packs, 4733 /// false otherwise. 4734 bool containsUnexpandedParameterPacks(Declarator &D); 4735 4736 //===--------------------------------------------------------------------===// 4737 // C++ Template Argument Deduction (C++ [temp.deduct]) 4738 //===--------------------------------------------------------------------===// 4739 4740 /// \brief Describes the result of template argument deduction. 4741 /// 4742 /// The TemplateDeductionResult enumeration describes the result of 4743 /// template argument deduction, as returned from 4744 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4745 /// structure provides additional information about the results of 4746 /// template argument deduction, e.g., the deduced template argument 4747 /// list (if successful) or the specific template parameters or 4748 /// deduced arguments that were involved in the failure. 4749 enum TemplateDeductionResult { 4750 /// \brief Template argument deduction was successful. 4751 TDK_Success = 0, 4752 /// \brief Template argument deduction exceeded the maximum template 4753 /// instantiation depth (which has already been diagnosed). 4754 TDK_InstantiationDepth, 4755 /// \brief Template argument deduction did not deduce a value 4756 /// for every template parameter. 4757 TDK_Incomplete, 4758 /// \brief Template argument deduction produced inconsistent 4759 /// deduced values for the given template parameter. 4760 TDK_Inconsistent, 4761 /// \brief Template argument deduction failed due to inconsistent 4762 /// cv-qualifiers on a template parameter type that would 4763 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4764 /// but were given a non-const "X". 4765 TDK_Underqualified, 4766 /// \brief Substitution of the deduced template argument values 4767 /// resulted in an error. 4768 TDK_SubstitutionFailure, 4769 /// \brief Substitution of the deduced template argument values 4770 /// into a non-deduced context produced a type or value that 4771 /// produces a type that does not match the original template 4772 /// arguments provided. 4773 TDK_NonDeducedMismatch, 4774 /// \brief When performing template argument deduction for a function 4775 /// template, there were too many call arguments. 4776 TDK_TooManyArguments, 4777 /// \brief When performing template argument deduction for a function 4778 /// template, there were too few call arguments. 4779 TDK_TooFewArguments, 4780 /// \brief The explicitly-specified template arguments were not valid 4781 /// template arguments for the given template. 4782 TDK_InvalidExplicitArguments, 4783 /// \brief The arguments included an overloaded function name that could 4784 /// not be resolved to a suitable function. 4785 TDK_FailedOverloadResolution 4786 }; 4787 4788 TemplateDeductionResult 4789 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4790 const TemplateArgumentList &TemplateArgs, 4791 sema::TemplateDeductionInfo &Info); 4792 4793 TemplateDeductionResult 4794 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4795 TemplateArgumentListInfo &ExplicitTemplateArgs, 4796 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4797 SmallVectorImpl<QualType> &ParamTypes, 4798 QualType *FunctionType, 4799 sema::TemplateDeductionInfo &Info); 4800 4801 /// brief A function argument from which we performed template argument 4802 // deduction for a call. 4803 struct OriginalCallArg { 4804 OriginalCallArg(QualType OriginalParamType, 4805 unsigned ArgIdx, 4806 QualType OriginalArgType) 4807 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4808 OriginalArgType(OriginalArgType) { } 4809 4810 QualType OriginalParamType; 4811 unsigned ArgIdx; 4812 QualType OriginalArgType; 4813 }; 4814 4815 TemplateDeductionResult 4816 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4817 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4818 unsigned NumExplicitlySpecified, 4819 FunctionDecl *&Specialization, 4820 sema::TemplateDeductionInfo &Info, 4821 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4822 4823 TemplateDeductionResult 4824 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4825 TemplateArgumentListInfo *ExplicitTemplateArgs, 4826 Expr **Args, unsigned NumArgs, 4827 FunctionDecl *&Specialization, 4828 sema::TemplateDeductionInfo &Info); 4829 4830 TemplateDeductionResult 4831 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4832 TemplateArgumentListInfo *ExplicitTemplateArgs, 4833 QualType ArgFunctionType, 4834 FunctionDecl *&Specialization, 4835 sema::TemplateDeductionInfo &Info); 4836 4837 TemplateDeductionResult 4838 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4839 QualType ToType, 4840 CXXConversionDecl *&Specialization, 4841 sema::TemplateDeductionInfo &Info); 4842 4843 TemplateDeductionResult 4844 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4845 TemplateArgumentListInfo *ExplicitTemplateArgs, 4846 FunctionDecl *&Specialization, 4847 sema::TemplateDeductionInfo &Info); 4848 4849 /// \brief Result type of DeduceAutoType. 4850 enum DeduceAutoResult { 4851 DAR_Succeeded, 4852 DAR_Failed, 4853 DAR_FailedAlreadyDiagnosed 4854 }; 4855 4856 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4857 TypeSourceInfo *&Result); 4858 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4859 4860 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4861 FunctionTemplateDecl *FT2, 4862 SourceLocation Loc, 4863 TemplatePartialOrderingContext TPOC, 4864 unsigned NumCallArguments); 4865 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4866 UnresolvedSetIterator SEnd, 4867 TemplatePartialOrderingContext TPOC, 4868 unsigned NumCallArguments, 4869 SourceLocation Loc, 4870 const PartialDiagnostic &NoneDiag, 4871 const PartialDiagnostic &AmbigDiag, 4872 const PartialDiagnostic &CandidateDiag, 4873 bool Complain = true, 4874 QualType TargetType = QualType()); 4875 4876 ClassTemplatePartialSpecializationDecl * 4877 getMoreSpecializedPartialSpecialization( 4878 ClassTemplatePartialSpecializationDecl *PS1, 4879 ClassTemplatePartialSpecializationDecl *PS2, 4880 SourceLocation Loc); 4881 4882 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4883 bool OnlyDeduced, 4884 unsigned Depth, 4885 llvm::SmallBitVector &Used); 4886 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4887 llvm::SmallBitVector &Deduced) { 4888 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4889 } 4890 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4891 FunctionTemplateDecl *FunctionTemplate, 4892 llvm::SmallBitVector &Deduced); 4893 4894 //===--------------------------------------------------------------------===// 4895 // C++ Template Instantiation 4896 // 4897 4898 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4899 const TemplateArgumentList *Innermost = 0, 4900 bool RelativeToPrimary = false, 4901 const FunctionDecl *Pattern = 0); 4902 4903 /// \brief A template instantiation that is currently in progress. 4904 struct ActiveTemplateInstantiation { 4905 /// \brief The kind of template instantiation we are performing 4906 enum InstantiationKind { 4907 /// We are instantiating a template declaration. The entity is 4908 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4909 TemplateInstantiation, 4910 4911 /// We are instantiating a default argument for a template 4912 /// parameter. The Entity is the template, and 4913 /// TemplateArgs/NumTemplateArguments provides the template 4914 /// arguments as specified. 4915 /// FIXME: Use a TemplateArgumentList 4916 DefaultTemplateArgumentInstantiation, 4917 4918 /// We are instantiating a default argument for a function. 4919 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4920 /// provides the template arguments as specified. 4921 DefaultFunctionArgumentInstantiation, 4922 4923 /// We are substituting explicit template arguments provided for 4924 /// a function template. The entity is a FunctionTemplateDecl. 4925 ExplicitTemplateArgumentSubstitution, 4926 4927 /// We are substituting template argument determined as part of 4928 /// template argument deduction for either a class template 4929 /// partial specialization or a function template. The 4930 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4931 /// a FunctionTemplateDecl. 4932 DeducedTemplateArgumentSubstitution, 4933 4934 /// We are substituting prior template arguments into a new 4935 /// template parameter. The template parameter itself is either a 4936 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4937 PriorTemplateArgumentSubstitution, 4938 4939 /// We are checking the validity of a default template argument that 4940 /// has been used when naming a template-id. 4941 DefaultTemplateArgumentChecking 4942 } Kind; 4943 4944 /// \brief The point of instantiation within the source code. 4945 SourceLocation PointOfInstantiation; 4946 4947 /// \brief The template (or partial specialization) in which we are 4948 /// performing the instantiation, for substitutions of prior template 4949 /// arguments. 4950 NamedDecl *Template; 4951 4952 /// \brief The entity that is being instantiated. 4953 uintptr_t Entity; 4954 4955 /// \brief The list of template arguments we are substituting, if they 4956 /// are not part of the entity. 4957 const TemplateArgument *TemplateArgs; 4958 4959 /// \brief The number of template arguments in TemplateArgs. 4960 unsigned NumTemplateArgs; 4961 4962 /// \brief The template deduction info object associated with the 4963 /// substitution or checking of explicit or deduced template arguments. 4964 sema::TemplateDeductionInfo *DeductionInfo; 4965 4966 /// \brief The source range that covers the construct that cause 4967 /// the instantiation, e.g., the template-id that causes a class 4968 /// template instantiation. 4969 SourceRange InstantiationRange; 4970 4971 ActiveTemplateInstantiation() 4972 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4973 NumTemplateArgs(0), DeductionInfo(0) {} 4974 4975 /// \brief Determines whether this template is an actual instantiation 4976 /// that should be counted toward the maximum instantiation depth. 4977 bool isInstantiationRecord() const; 4978 4979 friend bool operator==(const ActiveTemplateInstantiation &X, 4980 const ActiveTemplateInstantiation &Y) { 4981 if (X.Kind != Y.Kind) 4982 return false; 4983 4984 if (X.Entity != Y.Entity) 4985 return false; 4986 4987 switch (X.Kind) { 4988 case TemplateInstantiation: 4989 return true; 4990 4991 case PriorTemplateArgumentSubstitution: 4992 case DefaultTemplateArgumentChecking: 4993 if (X.Template != Y.Template) 4994 return false; 4995 4996 // Fall through 4997 4998 case DefaultTemplateArgumentInstantiation: 4999 case ExplicitTemplateArgumentSubstitution: 5000 case DeducedTemplateArgumentSubstitution: 5001 case DefaultFunctionArgumentInstantiation: 5002 return X.TemplateArgs == Y.TemplateArgs; 5003 5004 } 5005 5006 llvm_unreachable("Invalid InstantiationKind!"); 5007 } 5008 5009 friend bool operator!=(const ActiveTemplateInstantiation &X, 5010 const ActiveTemplateInstantiation &Y) { 5011 return !(X == Y); 5012 } 5013 }; 5014 5015 /// \brief List of active template instantiations. 5016 /// 5017 /// This vector is treated as a stack. As one template instantiation 5018 /// requires another template instantiation, additional 5019 /// instantiations are pushed onto the stack up to a 5020 /// user-configurable limit LangOptions::InstantiationDepth. 5021 SmallVector<ActiveTemplateInstantiation, 16> 5022 ActiveTemplateInstantiations; 5023 5024 /// \brief Whether we are in a SFINAE context that is not associated with 5025 /// template instantiation. 5026 /// 5027 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5028 /// of a template instantiation or template argument deduction. 5029 bool InNonInstantiationSFINAEContext; 5030 5031 /// \brief The number of ActiveTemplateInstantiation entries in 5032 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5033 /// therefore, should not be counted as part of the instantiation depth. 5034 unsigned NonInstantiationEntries; 5035 5036 /// \brief The last template from which a template instantiation 5037 /// error or warning was produced. 5038 /// 5039 /// This value is used to suppress printing of redundant template 5040 /// instantiation backtraces when there are multiple errors in the 5041 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5042 /// to implement it anywhere else. 5043 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5044 5045 /// \brief The current index into pack expansion arguments that will be 5046 /// used for substitution of parameter packs. 5047 /// 5048 /// The pack expansion index will be -1 to indicate that parameter packs 5049 /// should be instantiated as themselves. Otherwise, the index specifies 5050 /// which argument within the parameter pack will be used for substitution. 5051 int ArgumentPackSubstitutionIndex; 5052 5053 /// \brief RAII object used to change the argument pack substitution index 5054 /// within a \c Sema object. 5055 /// 5056 /// See \c ArgumentPackSubstitutionIndex for more information. 5057 class ArgumentPackSubstitutionIndexRAII { 5058 Sema &Self; 5059 int OldSubstitutionIndex; 5060 5061 public: 5062 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5063 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5064 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5065 } 5066 5067 ~ArgumentPackSubstitutionIndexRAII() { 5068 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5069 } 5070 }; 5071 5072 friend class ArgumentPackSubstitutionRAII; 5073 5074 /// \brief The stack of calls expression undergoing template instantiation. 5075 /// 5076 /// The top of this stack is used by a fixit instantiating unresolved 5077 /// function calls to fix the AST to match the textual change it prints. 5078 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5079 5080 /// \brief For each declaration that involved template argument deduction, the 5081 /// set of diagnostics that were suppressed during that template argument 5082 /// deduction. 5083 /// 5084 /// FIXME: Serialize this structure to the AST file. 5085 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5086 SuppressedDiagnostics; 5087 5088 /// \brief A stack object to be created when performing template 5089 /// instantiation. 5090 /// 5091 /// Construction of an object of type \c InstantiatingTemplate 5092 /// pushes the current instantiation onto the stack of active 5093 /// instantiations. If the size of this stack exceeds the maximum 5094 /// number of recursive template instantiations, construction 5095 /// produces an error and evaluates true. 5096 /// 5097 /// Destruction of this object will pop the named instantiation off 5098 /// the stack. 5099 struct InstantiatingTemplate { 5100 /// \brief Note that we are instantiating a class template, 5101 /// function template, or a member thereof. 5102 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5103 Decl *Entity, 5104 SourceRange InstantiationRange = SourceRange()); 5105 5106 /// \brief Note that we are instantiating a default argument in a 5107 /// template-id. 5108 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5109 TemplateDecl *Template, 5110 const TemplateArgument *TemplateArgs, 5111 unsigned NumTemplateArgs, 5112 SourceRange InstantiationRange = SourceRange()); 5113 5114 /// \brief Note that we are instantiating a default argument in a 5115 /// template-id. 5116 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5117 FunctionTemplateDecl *FunctionTemplate, 5118 const TemplateArgument *TemplateArgs, 5119 unsigned NumTemplateArgs, 5120 ActiveTemplateInstantiation::InstantiationKind Kind, 5121 sema::TemplateDeductionInfo &DeductionInfo, 5122 SourceRange InstantiationRange = SourceRange()); 5123 5124 /// \brief Note that we are instantiating as part of template 5125 /// argument deduction for a class template partial 5126 /// specialization. 5127 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5128 ClassTemplatePartialSpecializationDecl *PartialSpec, 5129 const TemplateArgument *TemplateArgs, 5130 unsigned NumTemplateArgs, 5131 sema::TemplateDeductionInfo &DeductionInfo, 5132 SourceRange InstantiationRange = SourceRange()); 5133 5134 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5135 ParmVarDecl *Param, 5136 const TemplateArgument *TemplateArgs, 5137 unsigned NumTemplateArgs, 5138 SourceRange InstantiationRange = SourceRange()); 5139 5140 /// \brief Note that we are substituting prior template arguments into a 5141 /// non-type or template template parameter. 5142 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5143 NamedDecl *Template, 5144 NonTypeTemplateParmDecl *Param, 5145 const TemplateArgument *TemplateArgs, 5146 unsigned NumTemplateArgs, 5147 SourceRange InstantiationRange); 5148 5149 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5150 NamedDecl *Template, 5151 TemplateTemplateParmDecl *Param, 5152 const TemplateArgument *TemplateArgs, 5153 unsigned NumTemplateArgs, 5154 SourceRange InstantiationRange); 5155 5156 /// \brief Note that we are checking the default template argument 5157 /// against the template parameter for a given template-id. 5158 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5159 TemplateDecl *Template, 5160 NamedDecl *Param, 5161 const TemplateArgument *TemplateArgs, 5162 unsigned NumTemplateArgs, 5163 SourceRange InstantiationRange); 5164 5165 5166 /// \brief Note that we have finished instantiating this template. 5167 void Clear(); 5168 5169 ~InstantiatingTemplate() { Clear(); } 5170 5171 /// \brief Determines whether we have exceeded the maximum 5172 /// recursive template instantiations. 5173 operator bool() const { return Invalid; } 5174 5175 private: 5176 Sema &SemaRef; 5177 bool Invalid; 5178 bool SavedInNonInstantiationSFINAEContext; 5179 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5180 SourceRange InstantiationRange); 5181 5182 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5183 5184 InstantiatingTemplate& 5185 operator=(const InstantiatingTemplate&); // not implemented 5186 }; 5187 5188 void PrintInstantiationStack(); 5189 5190 /// \brief Determines whether we are currently in a context where 5191 /// template argument substitution failures are not considered 5192 /// errors. 5193 /// 5194 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5195 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5196 /// template-deduction context object, which can be used to capture 5197 /// diagnostics that will be suppressed. 5198 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5199 5200 /// \brief RAII class used to determine whether SFINAE has 5201 /// trapped any errors that occur during template argument 5202 /// deduction.` 5203 class SFINAETrap { 5204 Sema &SemaRef; 5205 unsigned PrevSFINAEErrors; 5206 bool PrevInNonInstantiationSFINAEContext; 5207 bool PrevAccessCheckingSFINAE; 5208 5209 public: 5210 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5211 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5212 PrevInNonInstantiationSFINAEContext( 5213 SemaRef.InNonInstantiationSFINAEContext), 5214 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5215 { 5216 if (!SemaRef.isSFINAEContext()) 5217 SemaRef.InNonInstantiationSFINAEContext = true; 5218 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5219 } 5220 5221 ~SFINAETrap() { 5222 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5223 SemaRef.InNonInstantiationSFINAEContext 5224 = PrevInNonInstantiationSFINAEContext; 5225 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5226 } 5227 5228 /// \brief Determine whether any SFINAE errors have been trapped. 5229 bool hasErrorOccurred() const { 5230 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5231 } 5232 }; 5233 5234 /// \brief The current instantiation scope used to store local 5235 /// variables. 5236 LocalInstantiationScope *CurrentInstantiationScope; 5237 5238 /// \brief The number of typos corrected by CorrectTypo. 5239 unsigned TyposCorrected; 5240 5241 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5242 UnqualifiedTyposCorrectedMap; 5243 5244 /// \brief A cache containing the results of typo correction for unqualified 5245 /// name lookup. 5246 /// 5247 /// The string is the string that we corrected to (which may be empty, if 5248 /// there was no correction), while the boolean will be true when the 5249 /// string represents a keyword. 5250 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5251 5252 /// \brief Worker object for performing CFG-based warnings. 5253 sema::AnalysisBasedWarnings AnalysisWarnings; 5254 5255 /// \brief An entity for which implicit template instantiation is required. 5256 /// 5257 /// The source location associated with the declaration is the first place in 5258 /// the source code where the declaration was "used". It is not necessarily 5259 /// the point of instantiation (which will be either before or after the 5260 /// namespace-scope declaration that triggered this implicit instantiation), 5261 /// However, it is the location that diagnostics should generally refer to, 5262 /// because users will need to know what code triggered the instantiation. 5263 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5264 5265 /// \brief The queue of implicit template instantiations that are required 5266 /// but have not yet been performed. 5267 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5268 5269 /// \brief The queue of implicit template instantiations that are required 5270 /// and must be performed within the current local scope. 5271 /// 5272 /// This queue is only used for member functions of local classes in 5273 /// templates, which must be instantiated in the same scope as their 5274 /// enclosing function, so that they can reference function-local 5275 /// types, static variables, enumerators, etc. 5276 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5277 5278 void PerformPendingInstantiations(bool LocalOnly = false); 5279 5280 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5281 const MultiLevelTemplateArgumentList &TemplateArgs, 5282 SourceLocation Loc, DeclarationName Entity); 5283 5284 QualType SubstType(QualType T, 5285 const MultiLevelTemplateArgumentList &TemplateArgs, 5286 SourceLocation Loc, DeclarationName Entity); 5287 5288 TypeSourceInfo *SubstType(TypeLoc TL, 5289 const MultiLevelTemplateArgumentList &TemplateArgs, 5290 SourceLocation Loc, DeclarationName Entity); 5291 5292 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5293 const MultiLevelTemplateArgumentList &TemplateArgs, 5294 SourceLocation Loc, 5295 DeclarationName Entity); 5296 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5297 const MultiLevelTemplateArgumentList &TemplateArgs, 5298 int indexAdjustment, 5299 llvm::Optional<unsigned> NumExpansions, 5300 bool ExpectParameterPack); 5301 bool SubstParmTypes(SourceLocation Loc, 5302 ParmVarDecl **Params, unsigned NumParams, 5303 const MultiLevelTemplateArgumentList &TemplateArgs, 5304 SmallVectorImpl<QualType> &ParamTypes, 5305 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5306 ExprResult SubstExpr(Expr *E, 5307 const MultiLevelTemplateArgumentList &TemplateArgs); 5308 5309 /// \brief Substitute the given template arguments into a list of 5310 /// expressions, expanding pack expansions if required. 5311 /// 5312 /// \param Exprs The list of expressions to substitute into. 5313 /// 5314 /// \param NumExprs The number of expressions in \p Exprs. 5315 /// 5316 /// \param IsCall Whether this is some form of call, in which case 5317 /// default arguments will be dropped. 5318 /// 5319 /// \param TemplateArgs The set of template arguments to substitute. 5320 /// 5321 /// \param Outputs Will receive all of the substituted arguments. 5322 /// 5323 /// \returns true if an error occurred, false otherwise. 5324 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5325 const MultiLevelTemplateArgumentList &TemplateArgs, 5326 SmallVectorImpl<Expr *> &Outputs); 5327 5328 StmtResult SubstStmt(Stmt *S, 5329 const MultiLevelTemplateArgumentList &TemplateArgs); 5330 5331 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5332 const MultiLevelTemplateArgumentList &TemplateArgs); 5333 5334 ExprResult SubstInitializer(Expr *E, 5335 const MultiLevelTemplateArgumentList &TemplateArgs, 5336 bool CXXDirectInit); 5337 5338 bool 5339 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5340 CXXRecordDecl *Pattern, 5341 const MultiLevelTemplateArgumentList &TemplateArgs); 5342 5343 bool 5344 InstantiateClass(SourceLocation PointOfInstantiation, 5345 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5346 const MultiLevelTemplateArgumentList &TemplateArgs, 5347 TemplateSpecializationKind TSK, 5348 bool Complain = true); 5349 5350 struct LateInstantiatedAttribute { 5351 const Attr *TmplAttr; 5352 LocalInstantiationScope *Scope; 5353 Decl *NewDecl; 5354 5355 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5356 Decl *D) 5357 : TmplAttr(A), Scope(S), NewDecl(D) 5358 { } 5359 }; 5360 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5361 5362 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5363 const Decl *Pattern, Decl *Inst, 5364 LateInstantiatedAttrVec *LateAttrs = 0, 5365 LocalInstantiationScope *OuterMostScope = 0); 5366 5367 bool 5368 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5369 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5370 TemplateSpecializationKind TSK, 5371 bool Complain = true); 5372 5373 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5374 CXXRecordDecl *Instantiation, 5375 const MultiLevelTemplateArgumentList &TemplateArgs, 5376 TemplateSpecializationKind TSK); 5377 5378 void InstantiateClassTemplateSpecializationMembers( 5379 SourceLocation PointOfInstantiation, 5380 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5381 TemplateSpecializationKind TSK); 5382 5383 NestedNameSpecifierLoc 5384 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5385 const MultiLevelTemplateArgumentList &TemplateArgs); 5386 5387 DeclarationNameInfo 5388 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5389 const MultiLevelTemplateArgumentList &TemplateArgs); 5390 TemplateName 5391 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5392 SourceLocation Loc, 5393 const MultiLevelTemplateArgumentList &TemplateArgs); 5394 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5395 TemplateArgumentListInfo &Result, 5396 const MultiLevelTemplateArgumentList &TemplateArgs); 5397 5398 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5399 FunctionDecl *Function, 5400 bool Recursive = false, 5401 bool DefinitionRequired = false); 5402 void InstantiateStaticDataMemberDefinition( 5403 SourceLocation PointOfInstantiation, 5404 VarDecl *Var, 5405 bool Recursive = false, 5406 bool DefinitionRequired = false); 5407 5408 void InstantiateMemInitializers(CXXConstructorDecl *New, 5409 const CXXConstructorDecl *Tmpl, 5410 const MultiLevelTemplateArgumentList &TemplateArgs); 5411 5412 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5413 const MultiLevelTemplateArgumentList &TemplateArgs); 5414 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5415 const MultiLevelTemplateArgumentList &TemplateArgs); 5416 5417 // Objective-C declarations. 5418 enum ObjCContainerKind { 5419 OCK_None = -1, 5420 OCK_Interface = 0, 5421 OCK_Protocol, 5422 OCK_Category, 5423 OCK_ClassExtension, 5424 OCK_Implementation, 5425 OCK_CategoryImplementation 5426 }; 5427 ObjCContainerKind getObjCContainerKind() const; 5428 5429 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5430 IdentifierInfo *ClassName, 5431 SourceLocation ClassLoc, 5432 IdentifierInfo *SuperName, 5433 SourceLocation SuperLoc, 5434 Decl * const *ProtoRefs, 5435 unsigned NumProtoRefs, 5436 const SourceLocation *ProtoLocs, 5437 SourceLocation EndProtoLoc, 5438 AttributeList *AttrList); 5439 5440 Decl *ActOnCompatiblityAlias( 5441 SourceLocation AtCompatibilityAliasLoc, 5442 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5443 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5444 5445 bool CheckForwardProtocolDeclarationForCircularDependency( 5446 IdentifierInfo *PName, 5447 SourceLocation &PLoc, SourceLocation PrevLoc, 5448 const ObjCList<ObjCProtocolDecl> &PList); 5449 5450 Decl *ActOnStartProtocolInterface( 5451 SourceLocation AtProtoInterfaceLoc, 5452 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5453 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5454 const SourceLocation *ProtoLocs, 5455 SourceLocation EndProtoLoc, 5456 AttributeList *AttrList); 5457 5458 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5459 IdentifierInfo *ClassName, 5460 SourceLocation ClassLoc, 5461 IdentifierInfo *CategoryName, 5462 SourceLocation CategoryLoc, 5463 Decl * const *ProtoRefs, 5464 unsigned NumProtoRefs, 5465 const SourceLocation *ProtoLocs, 5466 SourceLocation EndProtoLoc); 5467 5468 Decl *ActOnStartClassImplementation( 5469 SourceLocation AtClassImplLoc, 5470 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5471 IdentifierInfo *SuperClassname, 5472 SourceLocation SuperClassLoc); 5473 5474 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5475 IdentifierInfo *ClassName, 5476 SourceLocation ClassLoc, 5477 IdentifierInfo *CatName, 5478 SourceLocation CatLoc); 5479 5480 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5481 IdentifierInfo **IdentList, 5482 SourceLocation *IdentLocs, 5483 unsigned NumElts); 5484 5485 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5486 const IdentifierLocPair *IdentList, 5487 unsigned NumElts, 5488 AttributeList *attrList); 5489 5490 void FindProtocolDeclaration(bool WarnOnDeclarations, 5491 const IdentifierLocPair *ProtocolId, 5492 unsigned NumProtocols, 5493 SmallVectorImpl<Decl *> &Protocols); 5494 5495 /// Ensure attributes are consistent with type. 5496 /// \param [in, out] Attributes The attributes to check; they will 5497 /// be modified to be consistent with \arg PropertyTy. 5498 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5499 SourceLocation Loc, 5500 unsigned &Attributes); 5501 5502 /// Process the specified property declaration and create decls for the 5503 /// setters and getters as needed. 5504 /// \param property The property declaration being processed 5505 /// \param DC The semantic container for the property 5506 /// \param redeclaredProperty Declaration for property if redeclared 5507 /// in class extension. 5508 /// \param lexicalDC Container for redeclaredProperty. 5509 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5510 ObjCContainerDecl *DC, 5511 ObjCPropertyDecl *redeclaredProperty = 0, 5512 ObjCContainerDecl *lexicalDC = 0); 5513 5514 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5515 ObjCPropertyDecl *SuperProperty, 5516 const IdentifierInfo *Name); 5517 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5518 5519 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5520 ObjCMethodDecl *MethodDecl, 5521 bool IsInstance); 5522 5523 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5524 5525 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5526 ObjCInterfaceDecl *ID); 5527 5528 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5529 ObjCProtocolDecl *PDecl); 5530 5531 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5532 Decl **allMethods = 0, unsigned allNum = 0, 5533 Decl **allProperties = 0, unsigned pNum = 0, 5534 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5535 5536 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5537 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5538 Selector GetterSel, Selector SetterSel, 5539 bool *OverridingProperty, 5540 tok::ObjCKeywordKind MethodImplKind, 5541 DeclContext *lexicalDC = 0); 5542 5543 Decl *ActOnPropertyImplDecl(Scope *S, 5544 SourceLocation AtLoc, 5545 SourceLocation PropertyLoc, 5546 bool ImplKind, 5547 IdentifierInfo *PropertyId, 5548 IdentifierInfo *PropertyIvar, 5549 SourceLocation PropertyIvarLoc); 5550 5551 enum ObjCSpecialMethodKind { 5552 OSMK_None, 5553 OSMK_Alloc, 5554 OSMK_New, 5555 OSMK_Copy, 5556 OSMK_RetainingInit, 5557 OSMK_NonRetainingInit 5558 }; 5559 5560 struct ObjCArgInfo { 5561 IdentifierInfo *Name; 5562 SourceLocation NameLoc; 5563 // The Type is null if no type was specified, and the DeclSpec is invalid 5564 // in this case. 5565 ParsedType Type; 5566 ObjCDeclSpec DeclSpec; 5567 5568 /// ArgAttrs - Attribute list for this argument. 5569 AttributeList *ArgAttrs; 5570 }; 5571 5572 Decl *ActOnMethodDeclaration( 5573 Scope *S, 5574 SourceLocation BeginLoc, // location of the + or -. 5575 SourceLocation EndLoc, // location of the ; or {. 5576 tok::TokenKind MethodType, 5577 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5578 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5579 // optional arguments. The number of types/arguments is obtained 5580 // from the Sel.getNumArgs(). 5581 ObjCArgInfo *ArgInfo, 5582 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5583 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5584 bool isVariadic, bool MethodDefinition); 5585 5586 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5587 // Will search "local" class/category implementations for a method decl. 5588 // Will also search in class's root looking for instance method. 5589 // Returns 0 if no method is found. 5590 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5591 ObjCInterfaceDecl *CDecl); 5592 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5593 ObjCInterfaceDecl *ClassDecl); 5594 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5595 const ObjCObjectPointerType *OPT, 5596 bool IsInstance); 5597 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5598 bool IsInstance); 5599 5600 bool inferObjCARCLifetime(ValueDecl *decl); 5601 5602 ExprResult 5603 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5604 Expr *BaseExpr, 5605 SourceLocation OpLoc, 5606 DeclarationName MemberName, 5607 SourceLocation MemberLoc, 5608 SourceLocation SuperLoc, QualType SuperType, 5609 bool Super); 5610 5611 ExprResult 5612 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5613 IdentifierInfo &propertyName, 5614 SourceLocation receiverNameLoc, 5615 SourceLocation propertyNameLoc); 5616 5617 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5618 5619 /// \brief Describes the kind of message expression indicated by a message 5620 /// send that starts with an identifier. 5621 enum ObjCMessageKind { 5622 /// \brief The message is sent to 'super'. 5623 ObjCSuperMessage, 5624 /// \brief The message is an instance message. 5625 ObjCInstanceMessage, 5626 /// \brief The message is a class message, and the identifier is a type 5627 /// name. 5628 ObjCClassMessage 5629 }; 5630 5631 ObjCMessageKind getObjCMessageKind(Scope *S, 5632 IdentifierInfo *Name, 5633 SourceLocation NameLoc, 5634 bool IsSuper, 5635 bool HasTrailingDot, 5636 ParsedType &ReceiverType); 5637 5638 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5639 Selector Sel, 5640 SourceLocation LBracLoc, 5641 ArrayRef<SourceLocation> SelectorLocs, 5642 SourceLocation RBracLoc, 5643 MultiExprArg Args); 5644 5645 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5646 QualType ReceiverType, 5647 SourceLocation SuperLoc, 5648 Selector Sel, 5649 ObjCMethodDecl *Method, 5650 SourceLocation LBracLoc, 5651 ArrayRef<SourceLocation> SelectorLocs, 5652 SourceLocation RBracLoc, 5653 MultiExprArg Args, 5654 bool isImplicit = false); 5655 5656 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5657 bool isSuperReceiver, 5658 SourceLocation Loc, 5659 Selector Sel, 5660 ObjCMethodDecl *Method, 5661 MultiExprArg Args); 5662 5663 ExprResult ActOnClassMessage(Scope *S, 5664 ParsedType Receiver, 5665 Selector Sel, 5666 SourceLocation LBracLoc, 5667 ArrayRef<SourceLocation> SelectorLocs, 5668 SourceLocation RBracLoc, 5669 MultiExprArg Args); 5670 5671 ExprResult BuildInstanceMessage(Expr *Receiver, 5672 QualType ReceiverType, 5673 SourceLocation SuperLoc, 5674 Selector Sel, 5675 ObjCMethodDecl *Method, 5676 SourceLocation LBracLoc, 5677 ArrayRef<SourceLocation> SelectorLocs, 5678 SourceLocation RBracLoc, 5679 MultiExprArg Args, 5680 bool isImplicit = false); 5681 5682 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5683 QualType ReceiverType, 5684 SourceLocation Loc, 5685 Selector Sel, 5686 ObjCMethodDecl *Method, 5687 MultiExprArg Args); 5688 5689 ExprResult ActOnInstanceMessage(Scope *S, 5690 Expr *Receiver, 5691 Selector Sel, 5692 SourceLocation LBracLoc, 5693 ArrayRef<SourceLocation> SelectorLocs, 5694 SourceLocation RBracLoc, 5695 MultiExprArg Args); 5696 5697 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5698 ObjCBridgeCastKind Kind, 5699 SourceLocation BridgeKeywordLoc, 5700 TypeSourceInfo *TSInfo, 5701 Expr *SubExpr); 5702 5703 ExprResult ActOnObjCBridgedCast(Scope *S, 5704 SourceLocation LParenLoc, 5705 ObjCBridgeCastKind Kind, 5706 SourceLocation BridgeKeywordLoc, 5707 ParsedType Type, 5708 SourceLocation RParenLoc, 5709 Expr *SubExpr); 5710 5711 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5712 5713 /// \brief Check whether the given new method is a valid override of the 5714 /// given overridden method, and set any properties that should be inherited. 5715 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5716 const ObjCMethodDecl *Overridden, 5717 bool IsImplementation); 5718 5719 /// \brief Check whether the given method overrides any methods in its class, 5720 /// calling \c CheckObjCMethodOverride for each overridden method. 5721 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5722 5723 enum PragmaOptionsAlignKind { 5724 POAK_Native, // #pragma options align=native 5725 POAK_Natural, // #pragma options align=natural 5726 POAK_Packed, // #pragma options align=packed 5727 POAK_Power, // #pragma options align=power 5728 POAK_Mac68k, // #pragma options align=mac68k 5729 POAK_Reset // #pragma options align=reset 5730 }; 5731 5732 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5733 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5734 SourceLocation PragmaLoc, 5735 SourceLocation KindLoc); 5736 5737 enum PragmaPackKind { 5738 PPK_Default, // #pragma pack([n]) 5739 PPK_Show, // #pragma pack(show), only supported by MSVC. 5740 PPK_Push, // #pragma pack(push, [identifier], [n]) 5741 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5742 }; 5743 5744 enum PragmaMSStructKind { 5745 PMSST_OFF, // #pragms ms_struct off 5746 PMSST_ON // #pragms ms_struct on 5747 }; 5748 5749 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5750 void ActOnPragmaPack(PragmaPackKind Kind, 5751 IdentifierInfo *Name, 5752 Expr *Alignment, 5753 SourceLocation PragmaLoc, 5754 SourceLocation LParenLoc, 5755 SourceLocation RParenLoc); 5756 5757 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5758 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5759 5760 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5761 void ActOnPragmaUnused(const Token &Identifier, 5762 Scope *curScope, 5763 SourceLocation PragmaLoc); 5764 5765 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5766 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5767 SourceLocation PragmaLoc); 5768 5769 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5770 SourceLocation Loc); 5771 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5772 5773 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5774 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5775 SourceLocation PragmaLoc, 5776 SourceLocation WeakNameLoc); 5777 5778 /// ActOnPragmaRedefineExtname - Called on well formed 5779 /// #pragma redefine_extname oldname newname. 5780 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 5781 IdentifierInfo* AliasName, 5782 SourceLocation PragmaLoc, 5783 SourceLocation WeakNameLoc, 5784 SourceLocation AliasNameLoc); 5785 5786 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5787 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5788 IdentifierInfo* AliasName, 5789 SourceLocation PragmaLoc, 5790 SourceLocation WeakNameLoc, 5791 SourceLocation AliasNameLoc); 5792 5793 /// ActOnPragmaFPContract - Called on well formed 5794 /// #pragma {STDC,OPENCL} FP_CONTRACT 5795 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5796 5797 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5798 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5799 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5800 5801 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5802 void AddMsStructLayoutForRecord(RecordDecl *RD); 5803 5804 /// FreePackedContext - Deallocate and null out PackContext. 5805 void FreePackedContext(); 5806 5807 /// PushNamespaceVisibilityAttr - Note that we've entered a 5808 /// namespace with a visibility attribute. 5809 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5810 SourceLocation Loc); 5811 5812 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5813 /// add an appropriate visibility attribute. 5814 void AddPushedVisibilityAttribute(Decl *RD); 5815 5816 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5817 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5818 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5819 5820 /// FreeVisContext - Deallocate and null out VisContext. 5821 void FreeVisContext(); 5822 5823 /// AddCFAuditedAttribute - Check whether we're currently within 5824 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5825 /// the appropriate attribute. 5826 void AddCFAuditedAttribute(Decl *D); 5827 5828 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5829 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5830 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5831 5832 /// \brief The kind of conversion being performed. 5833 enum CheckedConversionKind { 5834 /// \brief An implicit conversion. 5835 CCK_ImplicitConversion, 5836 /// \brief A C-style cast. 5837 CCK_CStyleCast, 5838 /// \brief A functional-style cast. 5839 CCK_FunctionalCast, 5840 /// \brief A cast other than a C-style cast. 5841 CCK_OtherCast 5842 }; 5843 5844 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5845 /// cast. If there is already an implicit cast, merge into the existing one. 5846 /// If isLvalue, the result of the cast is an lvalue. 5847 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5848 ExprValueKind VK = VK_RValue, 5849 const CXXCastPath *BasePath = 0, 5850 CheckedConversionKind CCK 5851 = CCK_ImplicitConversion); 5852 5853 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5854 /// to the conversion from scalar type ScalarTy to the Boolean type. 5855 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5856 5857 /// IgnoredValueConversions - Given that an expression's result is 5858 /// syntactically ignored, perform any conversions that are 5859 /// required. 5860 ExprResult IgnoredValueConversions(Expr *E); 5861 5862 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5863 // functions and arrays to their respective pointers (C99 6.3.2.1). 5864 ExprResult UsualUnaryConversions(Expr *E); 5865 5866 // DefaultFunctionArrayConversion - converts functions and arrays 5867 // to their respective pointers (C99 6.3.2.1). 5868 ExprResult DefaultFunctionArrayConversion(Expr *E); 5869 5870 // DefaultFunctionArrayLvalueConversion - converts functions and 5871 // arrays to their respective pointers and performs the 5872 // lvalue-to-rvalue conversion. 5873 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5874 5875 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5876 // the operand. This is DefaultFunctionArrayLvalueConversion, 5877 // except that it assumes the operand isn't of function or array 5878 // type. 5879 ExprResult DefaultLvalueConversion(Expr *E); 5880 5881 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5882 // do not have a prototype. Integer promotions are performed on each 5883 // argument, and arguments that have type float are promoted to double. 5884 ExprResult DefaultArgumentPromotion(Expr *E); 5885 5886 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5887 enum VariadicCallType { 5888 VariadicFunction, 5889 VariadicBlock, 5890 VariadicMethod, 5891 VariadicConstructor, 5892 VariadicDoesNotApply 5893 }; 5894 5895 /// GatherArgumentsForCall - Collector argument expressions for various 5896 /// form of call prototypes. 5897 bool GatherArgumentsForCall(SourceLocation CallLoc, 5898 FunctionDecl *FDecl, 5899 const FunctionProtoType *Proto, 5900 unsigned FirstProtoArg, 5901 Expr **Args, unsigned NumArgs, 5902 SmallVector<Expr *, 8> &AllArgs, 5903 VariadicCallType CallType = VariadicDoesNotApply); 5904 5905 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5906 // will warn if the resulting type is not a POD type. 5907 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5908 FunctionDecl *FDecl); 5909 5910 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5911 // operands and then handles various conversions that are common to binary 5912 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5913 // routine returns the first non-arithmetic type found. The client is 5914 // responsible for emitting appropriate error diagnostics. 5915 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5916 bool IsCompAssign = false); 5917 5918 /// AssignConvertType - All of the 'assignment' semantic checks return this 5919 /// enum to indicate whether the assignment was allowed. These checks are 5920 /// done for simple assignments, as well as initialization, return from 5921 /// function, argument passing, etc. The query is phrased in terms of a 5922 /// source and destination type. 5923 enum AssignConvertType { 5924 /// Compatible - the types are compatible according to the standard. 5925 Compatible, 5926 5927 /// PointerToInt - The assignment converts a pointer to an int, which we 5928 /// accept as an extension. 5929 PointerToInt, 5930 5931 /// IntToPointer - The assignment converts an int to a pointer, which we 5932 /// accept as an extension. 5933 IntToPointer, 5934 5935 /// FunctionVoidPointer - The assignment is between a function pointer and 5936 /// void*, which the standard doesn't allow, but we accept as an extension. 5937 FunctionVoidPointer, 5938 5939 /// IncompatiblePointer - The assignment is between two pointers types that 5940 /// are not compatible, but we accept them as an extension. 5941 IncompatiblePointer, 5942 5943 /// IncompatiblePointer - The assignment is between two pointers types which 5944 /// point to integers which have a different sign, but are otherwise 5945 /// identical. This is a subset of the above, but broken out because it's by 5946 /// far the most common case of incompatible pointers. 5947 IncompatiblePointerSign, 5948 5949 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5950 /// c/v/r qualifiers, which we accept as an extension. 5951 CompatiblePointerDiscardsQualifiers, 5952 5953 /// IncompatiblePointerDiscardsQualifiers - The assignment 5954 /// discards qualifiers that we don't permit to be discarded, 5955 /// like address spaces. 5956 IncompatiblePointerDiscardsQualifiers, 5957 5958 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5959 /// nested pointer types, and the qualifiers other than the first two 5960 /// levels differ e.g. char ** -> const char **, but we accept them as an 5961 /// extension. 5962 IncompatibleNestedPointerQualifiers, 5963 5964 /// IncompatibleVectors - The assignment is between two vector types that 5965 /// have the same size, which we accept as an extension. 5966 IncompatibleVectors, 5967 5968 /// IntToBlockPointer - The assignment converts an int to a block 5969 /// pointer. We disallow this. 5970 IntToBlockPointer, 5971 5972 /// IncompatibleBlockPointer - The assignment is between two block 5973 /// pointers types that are not compatible. 5974 IncompatibleBlockPointer, 5975 5976 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5977 /// id type and something else (that is incompatible with it). For example, 5978 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5979 IncompatibleObjCQualifiedId, 5980 5981 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5982 /// object with __weak qualifier. 5983 IncompatibleObjCWeakRef, 5984 5985 /// Incompatible - We reject this conversion outright, it is invalid to 5986 /// represent it in the AST. 5987 Incompatible 5988 }; 5989 5990 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5991 /// assignment conversion type specified by ConvTy. This returns true if the 5992 /// conversion was invalid or false if the conversion was accepted. 5993 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5994 SourceLocation Loc, 5995 QualType DstType, QualType SrcType, 5996 Expr *SrcExpr, AssignmentAction Action, 5997 bool *Complained = 0); 5998 5999 /// CheckAssignmentConstraints - Perform type checking for assignment, 6000 /// argument passing, variable initialization, and function return values. 6001 /// C99 6.5.16. 6002 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6003 QualType LHSType, 6004 QualType RHSType); 6005 6006 /// Check assignment constraints and prepare for a conversion of the 6007 /// RHS to the LHS type. 6008 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6009 ExprResult &RHS, 6010 CastKind &Kind); 6011 6012 // CheckSingleAssignmentConstraints - Currently used by 6013 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6014 // this routine performs the default function/array converions. 6015 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6016 ExprResult &RHS, 6017 bool Diagnose = true); 6018 6019 // \brief If the lhs type is a transparent union, check whether we 6020 // can initialize the transparent union with the given expression. 6021 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6022 ExprResult &RHS); 6023 6024 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6025 6026 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6027 6028 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6029 AssignmentAction Action, 6030 bool AllowExplicit = false); 6031 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6032 AssignmentAction Action, 6033 bool AllowExplicit, 6034 ImplicitConversionSequence& ICS); 6035 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6036 const ImplicitConversionSequence& ICS, 6037 AssignmentAction Action, 6038 CheckedConversionKind CCK 6039 = CCK_ImplicitConversion); 6040 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6041 const StandardConversionSequence& SCS, 6042 AssignmentAction Action, 6043 CheckedConversionKind CCK); 6044 6045 /// the following "Check" methods will return a valid/converted QualType 6046 /// or a null QualType (indicating an error diagnostic was issued). 6047 6048 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6049 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6050 ExprResult &RHS); 6051 QualType CheckPointerToMemberOperands( // C++ 5.5 6052 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6053 SourceLocation OpLoc, bool isIndirect); 6054 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6055 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6056 bool IsDivide); 6057 QualType CheckRemainderOperands( // C99 6.5.5 6058 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6059 bool IsCompAssign = false); 6060 QualType CheckAdditionOperands( // C99 6.5.6 6061 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6062 QualType* CompLHSTy = 0); 6063 QualType CheckSubtractionOperands( // C99 6.5.6 6064 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6065 QualType* CompLHSTy = 0); 6066 QualType CheckShiftOperands( // C99 6.5.7 6067 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6068 bool IsCompAssign = false); 6069 QualType CheckCompareOperands( // C99 6.5.8/9 6070 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6071 bool isRelational); 6072 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6073 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6074 bool IsCompAssign = false); 6075 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6076 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6077 // CheckAssignmentOperands is used for both simple and compound assignment. 6078 // For simple assignment, pass both expressions and a null converted type. 6079 // For compound assignment, pass both expressions and the converted type. 6080 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6081 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6082 6083 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6084 UnaryOperatorKind Opcode, Expr *Op); 6085 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6086 BinaryOperatorKind Opcode, 6087 Expr *LHS, Expr *RHS); 6088 ExprResult checkPseudoObjectRValue(Expr *E); 6089 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6090 6091 QualType CheckConditionalOperands( // C99 6.5.15 6092 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6093 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6094 QualType CXXCheckConditionalOperands( // C++ 5.16 6095 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6096 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6097 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6098 bool *NonStandardCompositeType = 0); 6099 QualType FindCompositePointerType(SourceLocation Loc, 6100 ExprResult &E1, ExprResult &E2, 6101 bool *NonStandardCompositeType = 0) { 6102 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6103 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6104 NonStandardCompositeType); 6105 E1 = Owned(E1Tmp); 6106 E2 = Owned(E2Tmp); 6107 return Composite; 6108 } 6109 6110 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6111 SourceLocation QuestionLoc); 6112 6113 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6114 SourceLocation QuestionLoc); 6115 6116 /// type checking for vector binary operators. 6117 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6118 SourceLocation Loc, bool IsCompAssign); 6119 QualType GetSignedVectorType(QualType V); 6120 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6121 SourceLocation Loc, bool isRelational); 6122 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6123 SourceLocation Loc); 6124 6125 /// type checking declaration initializers (C99 6.7.8) 6126 bool CheckForConstantInitializer(Expr *e, QualType t); 6127 6128 // type checking C++ declaration initializers (C++ [dcl.init]). 6129 6130 /// ReferenceCompareResult - Expresses the result of comparing two 6131 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6132 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6133 enum ReferenceCompareResult { 6134 /// Ref_Incompatible - The two types are incompatible, so direct 6135 /// reference binding is not possible. 6136 Ref_Incompatible = 0, 6137 /// Ref_Related - The two types are reference-related, which means 6138 /// that their unqualified forms (T1 and T2) are either the same 6139 /// or T1 is a base class of T2. 6140 Ref_Related, 6141 /// Ref_Compatible_With_Added_Qualification - The two types are 6142 /// reference-compatible with added qualification, meaning that 6143 /// they are reference-compatible and the qualifiers on T1 (cv1) 6144 /// are greater than the qualifiers on T2 (cv2). 6145 Ref_Compatible_With_Added_Qualification, 6146 /// Ref_Compatible - The two types are reference-compatible and 6147 /// have equivalent qualifiers (cv1 == cv2). 6148 Ref_Compatible 6149 }; 6150 6151 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6152 QualType T1, QualType T2, 6153 bool &DerivedToBase, 6154 bool &ObjCConversion, 6155 bool &ObjCLifetimeConversion); 6156 6157 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6158 Expr *CastExpr, CastKind &CastKind, 6159 ExprValueKind &VK, CXXCastPath &Path); 6160 6161 /// \brief Force an expression with unknown-type to an expression of the 6162 /// given type. 6163 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6164 6165 // CheckVectorCast - check type constraints for vectors. 6166 // Since vectors are an extension, there are no C standard reference for this. 6167 // We allow casting between vectors and integer datatypes of the same size. 6168 // returns true if the cast is invalid 6169 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6170 CastKind &Kind); 6171 6172 // CheckExtVectorCast - check type constraints for extended vectors. 6173 // Since vectors are an extension, there are no C standard reference for this. 6174 // We allow casting between vectors and integer datatypes of the same size, 6175 // or vectors and the element type of that vector. 6176 // returns the cast expr 6177 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6178 CastKind &Kind); 6179 6180 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6181 SourceLocation LParenLoc, 6182 Expr *CastExpr, 6183 SourceLocation RParenLoc); 6184 6185 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6186 6187 /// \brief Checks for invalid conversions and casts between 6188 /// retainable pointers and other pointer kinds. 6189 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6190 QualType castType, Expr *&op, 6191 CheckedConversionKind CCK); 6192 6193 Expr *stripARCUnbridgedCast(Expr *e); 6194 void diagnoseARCUnbridgedCast(Expr *e); 6195 6196 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6197 QualType ExprType); 6198 6199 /// checkRetainCycles - Check whether an Objective-C message send 6200 /// might create an obvious retain cycle. 6201 void checkRetainCycles(ObjCMessageExpr *msg); 6202 void checkRetainCycles(Expr *receiver, Expr *argument); 6203 6204 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6205 /// to weak/__unsafe_unretained type. 6206 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6207 6208 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6209 /// to weak/__unsafe_unretained expression. 6210 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6211 6212 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6213 /// \param Method - May be null. 6214 /// \param [out] ReturnType - The return type of the send. 6215 /// \return true iff there were any incompatible types. 6216 bool CheckMessageArgumentTypes(QualType ReceiverType, 6217 Expr **Args, unsigned NumArgs, Selector Sel, 6218 ObjCMethodDecl *Method, bool isClassMessage, 6219 bool isSuperMessage, 6220 SourceLocation lbrac, SourceLocation rbrac, 6221 QualType &ReturnType, ExprValueKind &VK); 6222 6223 /// \brief Determine the result of a message send expression based on 6224 /// the type of the receiver, the method expected to receive the message, 6225 /// and the form of the message send. 6226 QualType getMessageSendResultType(QualType ReceiverType, 6227 ObjCMethodDecl *Method, 6228 bool isClassMessage, bool isSuperMessage); 6229 6230 /// \brief If the given expression involves a message send to a method 6231 /// with a related result type, emit a note describing what happened. 6232 void EmitRelatedResultTypeNote(const Expr *E); 6233 6234 /// CheckBooleanCondition - Diagnose problems involving the use of 6235 /// the given expression as a boolean condition (e.g. in an if 6236 /// statement). Also performs the standard function and array 6237 /// decays, possibly changing the input variable. 6238 /// 6239 /// \param Loc - A location associated with the condition, e.g. the 6240 /// 'if' keyword. 6241 /// \return true iff there were any errors 6242 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6243 6244 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6245 Expr *SubExpr); 6246 6247 /// DiagnoseAssignmentAsCondition - Given that an expression is 6248 /// being used as a boolean condition, warn if it's an assignment. 6249 void DiagnoseAssignmentAsCondition(Expr *E); 6250 6251 /// \brief Redundant parentheses over an equality comparison can indicate 6252 /// that the user intended an assignment used as condition. 6253 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6254 6255 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6256 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6257 6258 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6259 /// the specified width and sign. If an overflow occurs, detect it and emit 6260 /// the specified diagnostic. 6261 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6262 unsigned NewWidth, bool NewSign, 6263 SourceLocation Loc, unsigned DiagID); 6264 6265 /// Checks that the Objective-C declaration is declared in the global scope. 6266 /// Emits an error and marks the declaration as invalid if it's not declared 6267 /// in the global scope. 6268 bool CheckObjCDeclScope(Decl *D); 6269 6270 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6271 /// and reports the appropriate diagnostics. Returns false on success. 6272 /// Can optionally return the value of the expression. 6273 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6274 PartialDiagnostic Diag, 6275 bool AllowFold, 6276 PartialDiagnostic FoldDiag); 6277 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6278 PartialDiagnostic Diag, 6279 bool AllowFold = true) { 6280 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6281 PDiag(0)); 6282 } 6283 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6284 6285 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6286 /// the correct width, and that the field type is valid. 6287 /// Returns false on success. 6288 /// Can optionally return whether the bit-field is of width 0 6289 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6290 QualType FieldTy, Expr *BitWidth, 6291 bool *ZeroWidth = 0); 6292 6293 enum CUDAFunctionTarget { 6294 CFT_Device, 6295 CFT_Global, 6296 CFT_Host, 6297 CFT_HostDevice 6298 }; 6299 6300 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6301 6302 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6303 CUDAFunctionTarget CalleeTarget); 6304 6305 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6306 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6307 IdentifyCUDATarget(Callee)); 6308 } 6309 6310 /// \name Code completion 6311 //@{ 6312 /// \brief Describes the context in which code completion occurs. 6313 enum ParserCompletionContext { 6314 /// \brief Code completion occurs at top-level or namespace context. 6315 PCC_Namespace, 6316 /// \brief Code completion occurs within a class, struct, or union. 6317 PCC_Class, 6318 /// \brief Code completion occurs within an Objective-C interface, protocol, 6319 /// or category. 6320 PCC_ObjCInterface, 6321 /// \brief Code completion occurs within an Objective-C implementation or 6322 /// category implementation 6323 PCC_ObjCImplementation, 6324 /// \brief Code completion occurs within the list of instance variables 6325 /// in an Objective-C interface, protocol, category, or implementation. 6326 PCC_ObjCInstanceVariableList, 6327 /// \brief Code completion occurs following one or more template 6328 /// headers. 6329 PCC_Template, 6330 /// \brief Code completion occurs following one or more template 6331 /// headers within a class. 6332 PCC_MemberTemplate, 6333 /// \brief Code completion occurs within an expression. 6334 PCC_Expression, 6335 /// \brief Code completion occurs within a statement, which may 6336 /// also be an expression or a declaration. 6337 PCC_Statement, 6338 /// \brief Code completion occurs at the beginning of the 6339 /// initialization statement (or expression) in a for loop. 6340 PCC_ForInit, 6341 /// \brief Code completion occurs within the condition of an if, 6342 /// while, switch, or for statement. 6343 PCC_Condition, 6344 /// \brief Code completion occurs within the body of a function on a 6345 /// recovery path, where we do not have a specific handle on our position 6346 /// in the grammar. 6347 PCC_RecoveryInFunction, 6348 /// \brief Code completion occurs where only a type is permitted. 6349 PCC_Type, 6350 /// \brief Code completion occurs in a parenthesized expression, which 6351 /// might also be a type cast. 6352 PCC_ParenthesizedExpression, 6353 /// \brief Code completion occurs within a sequence of declaration 6354 /// specifiers within a function, method, or block. 6355 PCC_LocalDeclarationSpecifiers 6356 }; 6357 6358 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6359 void CodeCompleteOrdinaryName(Scope *S, 6360 ParserCompletionContext CompletionContext); 6361 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6362 bool AllowNonIdentifiers, 6363 bool AllowNestedNameSpecifiers); 6364 6365 struct CodeCompleteExpressionData; 6366 void CodeCompleteExpression(Scope *S, 6367 const CodeCompleteExpressionData &Data); 6368 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6369 SourceLocation OpLoc, 6370 bool IsArrow); 6371 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6372 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6373 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6374 void CodeCompleteCase(Scope *S); 6375 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6376 void CodeCompleteInitializer(Scope *S, Decl *D); 6377 void CodeCompleteReturn(Scope *S); 6378 void CodeCompleteAfterIf(Scope *S); 6379 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6380 6381 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6382 bool EnteringContext); 6383 void CodeCompleteUsing(Scope *S); 6384 void CodeCompleteUsingDirective(Scope *S); 6385 void CodeCompleteNamespaceDecl(Scope *S); 6386 void CodeCompleteNamespaceAliasDecl(Scope *S); 6387 void CodeCompleteOperatorName(Scope *S); 6388 void CodeCompleteConstructorInitializer(Decl *Constructor, 6389 CXXCtorInitializer** Initializers, 6390 unsigned NumInitializers); 6391 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6392 bool AfterAmpersand); 6393 6394 void CodeCompleteObjCAtDirective(Scope *S); 6395 void CodeCompleteObjCAtVisibility(Scope *S); 6396 void CodeCompleteObjCAtStatement(Scope *S); 6397 void CodeCompleteObjCAtExpression(Scope *S); 6398 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6399 void CodeCompleteObjCPropertyGetter(Scope *S); 6400 void CodeCompleteObjCPropertySetter(Scope *S); 6401 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6402 bool IsParameter); 6403 void CodeCompleteObjCMessageReceiver(Scope *S); 6404 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6405 IdentifierInfo **SelIdents, 6406 unsigned NumSelIdents, 6407 bool AtArgumentExpression); 6408 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6409 IdentifierInfo **SelIdents, 6410 unsigned NumSelIdents, 6411 bool AtArgumentExpression, 6412 bool IsSuper = false); 6413 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6414 IdentifierInfo **SelIdents, 6415 unsigned NumSelIdents, 6416 bool AtArgumentExpression, 6417 ObjCInterfaceDecl *Super = 0); 6418 void CodeCompleteObjCForCollection(Scope *S, 6419 DeclGroupPtrTy IterationVar); 6420 void CodeCompleteObjCSelector(Scope *S, 6421 IdentifierInfo **SelIdents, 6422 unsigned NumSelIdents); 6423 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6424 unsigned NumProtocols); 6425 void CodeCompleteObjCProtocolDecl(Scope *S); 6426 void CodeCompleteObjCInterfaceDecl(Scope *S); 6427 void CodeCompleteObjCSuperclass(Scope *S, 6428 IdentifierInfo *ClassName, 6429 SourceLocation ClassNameLoc); 6430 void CodeCompleteObjCImplementationDecl(Scope *S); 6431 void CodeCompleteObjCInterfaceCategory(Scope *S, 6432 IdentifierInfo *ClassName, 6433 SourceLocation ClassNameLoc); 6434 void CodeCompleteObjCImplementationCategory(Scope *S, 6435 IdentifierInfo *ClassName, 6436 SourceLocation ClassNameLoc); 6437 void CodeCompleteObjCPropertyDefinition(Scope *S); 6438 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6439 IdentifierInfo *PropertyName); 6440 void CodeCompleteObjCMethodDecl(Scope *S, 6441 bool IsInstanceMethod, 6442 ParsedType ReturnType); 6443 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6444 bool IsInstanceMethod, 6445 bool AtParameterName, 6446 ParsedType ReturnType, 6447 IdentifierInfo **SelIdents, 6448 unsigned NumSelIdents); 6449 void CodeCompletePreprocessorDirective(bool InConditional); 6450 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6451 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6452 void CodeCompletePreprocessorExpression(); 6453 void CodeCompletePreprocessorMacroArgument(Scope *S, 6454 IdentifierInfo *Macro, 6455 MacroInfo *MacroInfo, 6456 unsigned Argument); 6457 void CodeCompleteNaturalLanguage(); 6458 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6459 SmallVectorImpl<CodeCompletionResult> &Results); 6460 //@} 6461 6462 //===--------------------------------------------------------------------===// 6463 // Extra semantic analysis beyond the C type system 6464 6465public: 6466 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6467 unsigned ByteNo) const; 6468 6469private: 6470 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6471 const ArraySubscriptExpr *ASE=0, 6472 bool AllowOnePastEnd=true, bool IndexNegated=false); 6473 void CheckArrayAccess(const Expr *E); 6474 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6475 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6476 Expr **Args, unsigned NumArgs); 6477 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6478 6479 bool CheckObjCString(Expr *Arg); 6480 6481 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6482 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6483 6484 bool SemaBuiltinVAStart(CallExpr *TheCall); 6485 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6486 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6487 6488public: 6489 // Used by C++ template instantiation. 6490 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6491 6492private: 6493 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6494 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6495 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6496 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6497 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6498 AtomicExpr::AtomicOp Op); 6499 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6500 llvm::APSInt &Result); 6501 6502 enum FormatStringType { 6503 FST_Scanf, 6504 FST_Printf, 6505 FST_NSString, 6506 FST_Strftime, 6507 FST_Strfmon, 6508 FST_Kprintf, 6509 FST_Unknown 6510 }; 6511 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6512 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6513 bool HasVAListArg, unsigned format_idx, 6514 unsigned firstDataArg, FormatStringType Type, 6515 bool inFunctionCall = true); 6516 6517 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6518 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6519 unsigned format_idx, unsigned firstDataArg, 6520 FormatStringType Type, bool inFunctionCall); 6521 6522 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6523 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6524 unsigned NumArgs, bool IsCXXMember, 6525 SourceLocation Loc, SourceRange Range); 6526 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6527 bool HasVAListArg, unsigned format_idx, 6528 unsigned firstDataArg, FormatStringType Type, 6529 SourceLocation Loc, SourceRange range); 6530 6531 void CheckNonNullArguments(const NonNullAttr *NonNull, 6532 const Expr * const *ExprArgs, 6533 SourceLocation CallSiteLoc); 6534 6535 void CheckMemaccessArguments(const CallExpr *Call, 6536 unsigned BId, 6537 IdentifierInfo *FnName); 6538 6539 void CheckStrlcpycatArguments(const CallExpr *Call, 6540 IdentifierInfo *FnName); 6541 6542 void CheckStrncatArguments(const CallExpr *Call, 6543 IdentifierInfo *FnName); 6544 6545 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6546 SourceLocation ReturnLoc); 6547 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6548 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6549 6550 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6551 Expr *Init); 6552 6553 /// \brief The parser's current scope. 6554 /// 6555 /// The parser maintains this state here. 6556 Scope *CurScope; 6557 6558protected: 6559 friend class Parser; 6560 friend class InitializationSequence; 6561 friend class ASTReader; 6562 friend class ASTWriter; 6563 6564public: 6565 /// \brief Retrieve the parser's current scope. 6566 /// 6567 /// This routine must only be used when it is certain that semantic analysis 6568 /// and the parser are in precisely the same context, which is not the case 6569 /// when, e.g., we are performing any kind of template instantiation. 6570 /// Therefore, the only safe places to use this scope are in the parser 6571 /// itself and in routines directly invoked from the parser and *never* from 6572 /// template substitution or instantiation. 6573 Scope *getCurScope() const { return CurScope; } 6574 6575 Decl *getObjCDeclContext() const; 6576 6577 DeclContext *getCurLexicalContext() const { 6578 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6579 } 6580 6581 AvailabilityResult getCurContextAvailability() const; 6582}; 6583 6584/// \brief RAII object that enters a new expression evaluation context. 6585class EnterExpressionEvaluationContext { 6586 Sema &Actions; 6587 6588public: 6589 EnterExpressionEvaluationContext(Sema &Actions, 6590 Sema::ExpressionEvaluationContext NewContext, 6591 Decl *LambdaContextDecl = 0, 6592 bool IsDecltype = false) 6593 : Actions(Actions) { 6594 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6595 IsDecltype); 6596 } 6597 6598 ~EnterExpressionEvaluationContext() { 6599 Actions.PopExpressionEvaluationContext(); 6600 } 6601}; 6602 6603} // end namespace clang 6604 6605#endif 6606