Sema.h revision fbcf0405b7da1c8606e4223b4f91835643ecd5b4
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Lex/ModuleLoader.h" 32#include "clang/Basic/Specifiers.h" 33#include "clang/Basic/TemplateKinds.h" 34#include "clang/Basic/TypeTraits.h" 35#include "clang/Basic/ExpressionTraits.h" 36#include "llvm/ADT/ArrayRef.h" 37#include "llvm/ADT/OwningPtr.h" 38#include "llvm/ADT/SmallPtrSet.h" 39#include "llvm/ADT/SmallVector.h" 40#include <deque> 41#include <string> 42 43namespace llvm { 44 class APSInt; 45 template <typename ValueT> struct DenseMapInfo; 46 template <typename ValueT, typename ValueInfoT> class DenseSet; 47 class SmallBitVector; 48} 49 50namespace clang { 51 class ADLResult; 52 class ASTConsumer; 53 class ASTContext; 54 class ASTMutationListener; 55 class ASTReader; 56 class ASTWriter; 57 class ArrayType; 58 class AttributeList; 59 class BlockDecl; 60 class CXXBasePath; 61 class CXXBasePaths; 62 class CXXBindTemporaryExpr; 63 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 64 class CXXConstructorDecl; 65 class CXXConversionDecl; 66 class CXXDestructorDecl; 67 class CXXFieldCollector; 68 class CXXMemberCallExpr; 69 class CXXMethodDecl; 70 class CXXScopeSpec; 71 class CXXTemporary; 72 class CXXTryStmt; 73 class CallExpr; 74 class ClassTemplateDecl; 75 class ClassTemplatePartialSpecializationDecl; 76 class ClassTemplateSpecializationDecl; 77 class CodeCompleteConsumer; 78 class CodeCompletionAllocator; 79 class CodeCompletionResult; 80 class Decl; 81 class DeclAccessPair; 82 class DeclContext; 83 class DeclRefExpr; 84 class DeclaratorDecl; 85 class DeducedTemplateArgument; 86 class DependentDiagnostic; 87 class DesignatedInitExpr; 88 class Designation; 89 class EnumConstantDecl; 90 class Expr; 91 class ExtVectorType; 92 class ExternalSemaSource; 93 class FormatAttr; 94 class FriendDecl; 95 class FunctionDecl; 96 class FunctionProtoType; 97 class FunctionTemplateDecl; 98 class ImplicitConversionSequence; 99 class InitListExpr; 100 class InitializationKind; 101 class InitializationSequence; 102 class InitializedEntity; 103 class IntegerLiteral; 104 class LabelStmt; 105 class LambdaExpr; 106 class LangOptions; 107 class LocalInstantiationScope; 108 class LookupResult; 109 class MacroInfo; 110 class MultiLevelTemplateArgumentList; 111 class NamedDecl; 112 class NonNullAttr; 113 class ObjCCategoryDecl; 114 class ObjCCategoryImplDecl; 115 class ObjCCompatibleAliasDecl; 116 class ObjCContainerDecl; 117 class ObjCImplDecl; 118 class ObjCImplementationDecl; 119 class ObjCInterfaceDecl; 120 class ObjCIvarDecl; 121 template <class T> class ObjCList; 122 class ObjCMessageExpr; 123 class ObjCMethodDecl; 124 class ObjCPropertyDecl; 125 class ObjCProtocolDecl; 126 class OverloadCandidateSet; 127 class OverloadExpr; 128 class ParenListExpr; 129 class ParmVarDecl; 130 class Preprocessor; 131 class PseudoDestructorTypeStorage; 132 class PseudoObjectExpr; 133 class QualType; 134 class StandardConversionSequence; 135 class Stmt; 136 class StringLiteral; 137 class SwitchStmt; 138 class TargetAttributesSema; 139 class TemplateArgument; 140 class TemplateArgumentList; 141 class TemplateArgumentLoc; 142 class TemplateDecl; 143 class TemplateParameterList; 144 class TemplatePartialOrderingContext; 145 class TemplateTemplateParmDecl; 146 class Token; 147 class TypeAliasDecl; 148 class TypedefDecl; 149 class TypedefNameDecl; 150 class TypeLoc; 151 class UnqualifiedId; 152 class UnresolvedLookupExpr; 153 class UnresolvedMemberExpr; 154 class UnresolvedSetImpl; 155 class UnresolvedSetIterator; 156 class UsingDecl; 157 class UsingShadowDecl; 158 class ValueDecl; 159 class VarDecl; 160 class VisibilityAttr; 161 class VisibleDeclConsumer; 162 class IndirectFieldDecl; 163 164namespace sema { 165 class AccessedEntity; 166 class BlockScopeInfo; 167 class CompoundScopeInfo; 168 class DelayedDiagnostic; 169 class FunctionScopeInfo; 170 class LambdaScopeInfo; 171 class PossiblyUnreachableDiag; 172 class TemplateDeductionInfo; 173} 174 175// FIXME: No way to easily map from TemplateTypeParmTypes to 176// TemplateTypeParmDecls, so we have this horrible PointerUnion. 177typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 178 SourceLocation> UnexpandedParameterPack; 179 180/// Sema - This implements semantic analysis and AST building for C. 181class Sema { 182 Sema(const Sema&); // DO NOT IMPLEMENT 183 void operator=(const Sema&); // DO NOT IMPLEMENT 184 mutable const TargetAttributesSema* TheTargetAttributesSema; 185public: 186 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 187 typedef OpaquePtr<TemplateName> TemplateTy; 188 typedef OpaquePtr<QualType> TypeTy; 189 190 OpenCLOptions OpenCLFeatures; 191 FPOptions FPFeatures; 192 193 const LangOptions &LangOpts; 194 Preprocessor &PP; 195 ASTContext &Context; 196 ASTConsumer &Consumer; 197 DiagnosticsEngine &Diags; 198 SourceManager &SourceMgr; 199 200 /// \brief Flag indicating whether or not to collect detailed statistics. 201 bool CollectStats; 202 203 /// \brief Source of additional semantic information. 204 ExternalSemaSource *ExternalSource; 205 206 /// \brief Code-completion consumer. 207 CodeCompleteConsumer *CodeCompleter; 208 209 /// CurContext - This is the current declaration context of parsing. 210 DeclContext *CurContext; 211 212 /// \brief Generally null except when we temporarily switch decl contexts, 213 /// like in \see ActOnObjCTemporaryExitContainerContext. 214 DeclContext *OriginalLexicalContext; 215 216 /// VAListTagName - The declaration name corresponding to __va_list_tag. 217 /// This is used as part of a hack to omit that class from ADL results. 218 DeclarationName VAListTagName; 219 220 /// PackContext - Manages the stack for #pragma pack. An alignment 221 /// of 0 indicates default alignment. 222 void *PackContext; // Really a "PragmaPackStack*" 223 224 bool MSStructPragmaOn; // True when #pragma ms_struct on 225 226 /// VisContext - Manages the stack for #pragma GCC visibility. 227 void *VisContext; // Really a "PragmaVisStack*" 228 229 /// ExprNeedsCleanups - True if the current evaluation context 230 /// requires cleanups to be run at its conclusion. 231 bool ExprNeedsCleanups; 232 233 /// ExprCleanupObjects - This is the stack of objects requiring 234 /// cleanup that are created by the current full expression. The 235 /// element type here is ExprWithCleanups::Object. 236 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 237 238 llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs; 239 240 /// \brief Stack containing information about each of the nested 241 /// function, block, and method scopes that are currently active. 242 /// 243 /// This array is never empty. Clients should ignore the first 244 /// element, which is used to cache a single FunctionScopeInfo 245 /// that's used to parse every top-level function. 246 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 247 248 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 249 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 250 ExtVectorDeclsType; 251 252 /// ExtVectorDecls - This is a list all the extended vector types. This allows 253 /// us to associate a raw vector type with one of the ext_vector type names. 254 /// This is only necessary for issuing pretty diagnostics. 255 ExtVectorDeclsType ExtVectorDecls; 256 257 /// \brief The set of types for which we have already complained about the 258 /// definitions being hidden. 259 /// 260 /// This set is used to suppress redundant diagnostics. 261 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 262 263 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 264 OwningPtr<CXXFieldCollector> FieldCollector; 265 266 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 267 268 /// PureVirtualClassDiagSet - a set of class declarations which we have 269 /// emitted a list of pure virtual functions. Used to prevent emitting the 270 /// same list more than once. 271 OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 272 273 /// ParsingInitForAutoVars - a set of declarations with auto types for which 274 /// we are currently parsing the initializer. 275 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 276 277 /// \brief A mapping from external names to the most recent 278 /// locally-scoped external declaration with that name. 279 /// 280 /// This map contains external declarations introduced in local 281 /// scoped, e.g., 282 /// 283 /// \code 284 /// void f() { 285 /// void foo(int, int); 286 /// } 287 /// \endcode 288 /// 289 /// Here, the name "foo" will be associated with the declaration on 290 /// "foo" within f. This name is not visible outside of 291 /// "f". However, we still find it in two cases: 292 /// 293 /// - If we are declaring another external with the name "foo", we 294 /// can find "foo" as a previous declaration, so that the types 295 /// of this external declaration can be checked for 296 /// compatibility. 297 /// 298 /// - If we would implicitly declare "foo" (e.g., due to a call to 299 /// "foo" in C when no prototype or definition is visible), then 300 /// we find this declaration of "foo" and complain that it is 301 /// not visible. 302 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 303 304 /// \brief Look for a locally scoped external declaration by the given name. 305 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 306 findLocallyScopedExternalDecl(DeclarationName Name); 307 308 typedef LazyVector<VarDecl *, ExternalSemaSource, 309 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 310 TentativeDefinitionsType; 311 312 /// \brief All the tentative definitions encountered in the TU. 313 TentativeDefinitionsType TentativeDefinitions; 314 315 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 316 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 317 UnusedFileScopedDeclsType; 318 319 /// \brief The set of file scoped decls seen so far that have not been used 320 /// and must warn if not used. Only contains the first declaration. 321 UnusedFileScopedDeclsType UnusedFileScopedDecls; 322 323 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 324 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 325 DelegatingCtorDeclsType; 326 327 /// \brief All the delegating constructors seen so far in the file, used for 328 /// cycle detection at the end of the TU. 329 DelegatingCtorDeclsType DelegatingCtorDecls; 330 331 /// \brief All the overriding destructors seen during a class definition 332 /// (there could be multiple due to nested classes) that had their exception 333 /// spec checks delayed, plus the overridden destructor. 334 SmallVector<std::pair<const CXXDestructorDecl*, 335 const CXXDestructorDecl*>, 2> 336 DelayedDestructorExceptionSpecChecks; 337 338 /// \brief Callback to the parser to parse templated functions when needed. 339 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 340 LateTemplateParserCB *LateTemplateParser; 341 void *OpaqueParser; 342 343 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 344 LateTemplateParser = LTP; 345 OpaqueParser = P; 346 } 347 348 class DelayedDiagnostics; 349 350 class ParsingDeclState { 351 unsigned SavedStackSize; 352 friend class Sema::DelayedDiagnostics; 353 }; 354 355 class ProcessingContextState { 356 unsigned SavedParsingDepth; 357 unsigned SavedActiveStackBase; 358 friend class Sema::DelayedDiagnostics; 359 }; 360 361 /// A class which encapsulates the logic for delaying diagnostics 362 /// during parsing and other processing. 363 class DelayedDiagnostics { 364 /// \brief The stack of diagnostics that were delayed due to being 365 /// produced during the parsing of a declaration. 366 sema::DelayedDiagnostic *Stack; 367 368 /// \brief The number of objects on the delayed-diagnostics stack. 369 unsigned StackSize; 370 371 /// \brief The current capacity of the delayed-diagnostics stack. 372 unsigned StackCapacity; 373 374 /// \brief The index of the first "active" delayed diagnostic in 375 /// the stack. When parsing class definitions, we ignore active 376 /// delayed diagnostics from the surrounding context. 377 unsigned ActiveStackBase; 378 379 /// \brief The depth of the declarations we're currently parsing. 380 /// This gets saved and reset whenever we enter a class definition. 381 unsigned ParsingDepth; 382 383 public: 384 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 385 ActiveStackBase(0), ParsingDepth(0) {} 386 387 ~DelayedDiagnostics() { 388 delete[] reinterpret_cast<char*>(Stack); 389 } 390 391 /// Adds a delayed diagnostic. 392 void add(const sema::DelayedDiagnostic &diag); 393 394 /// Determines whether diagnostics should be delayed. 395 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 396 397 /// Observe that we've started parsing a declaration. Access and 398 /// deprecation diagnostics will be delayed; when the declaration 399 /// is completed, all active delayed diagnostics will be evaluated 400 /// in its context, and then active diagnostics stack will be 401 /// popped down to the saved depth. 402 ParsingDeclState pushParsingDecl() { 403 ParsingDepth++; 404 405 ParsingDeclState state; 406 state.SavedStackSize = StackSize; 407 return state; 408 } 409 410 /// Observe that we're completed parsing a declaration. 411 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 412 413 /// Observe that we've started processing a different context, the 414 /// contents of which are semantically separate from the 415 /// declarations it may lexically appear in. This sets aside the 416 /// current stack of active diagnostics and starts afresh. 417 ProcessingContextState pushContext() { 418 assert(StackSize >= ActiveStackBase); 419 420 ProcessingContextState state; 421 state.SavedParsingDepth = ParsingDepth; 422 state.SavedActiveStackBase = ActiveStackBase; 423 424 ActiveStackBase = StackSize; 425 ParsingDepth = 0; 426 427 return state; 428 } 429 430 /// Observe that we've stopped processing a context. This 431 /// restores the previous stack of active diagnostics. 432 void popContext(ProcessingContextState state) { 433 assert(ActiveStackBase == StackSize); 434 assert(ParsingDepth == 0); 435 ActiveStackBase = state.SavedActiveStackBase; 436 ParsingDepth = state.SavedParsingDepth; 437 } 438 } DelayedDiagnostics; 439 440 /// A RAII object to temporarily push a declaration context. 441 class ContextRAII { 442 private: 443 Sema &S; 444 DeclContext *SavedContext; 445 ProcessingContextState SavedContextState; 446 447 public: 448 ContextRAII(Sema &S, DeclContext *ContextToPush) 449 : S(S), SavedContext(S.CurContext), 450 SavedContextState(S.DelayedDiagnostics.pushContext()) 451 { 452 assert(ContextToPush && "pushing null context"); 453 S.CurContext = ContextToPush; 454 } 455 456 void pop() { 457 if (!SavedContext) return; 458 S.CurContext = SavedContext; 459 S.DelayedDiagnostics.popContext(SavedContextState); 460 SavedContext = 0; 461 } 462 463 ~ContextRAII() { 464 pop(); 465 } 466 }; 467 468 /// WeakUndeclaredIdentifiers - Identifiers contained in 469 /// #pragma weak before declared. rare. may alias another 470 /// identifier, declared or undeclared 471 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 472 473 /// ExtnameUndeclaredIdentifiers - Identifiers contained in 474 /// #pragma redefine_extname before declared. Used in Solaris system headers 475 /// to define functions that occur in multiple standards to call the version 476 /// in the currently selected standard. 477 llvm::DenseMap<IdentifierInfo*,AsmLabelAttr*> ExtnameUndeclaredIdentifiers; 478 479 480 /// \brief Load weak undeclared identifiers from the external source. 481 void LoadExternalWeakUndeclaredIdentifiers(); 482 483 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 484 /// #pragma weak during processing of other Decls. 485 /// I couldn't figure out a clean way to generate these in-line, so 486 /// we store them here and handle separately -- which is a hack. 487 /// It would be best to refactor this. 488 SmallVector<Decl*,2> WeakTopLevelDecl; 489 490 IdentifierResolver IdResolver; 491 492 /// Translation Unit Scope - useful to Objective-C actions that need 493 /// to lookup file scope declarations in the "ordinary" C decl namespace. 494 /// For example, user-defined classes, built-in "id" type, etc. 495 Scope *TUScope; 496 497 /// \brief The C++ "std" namespace, where the standard library resides. 498 LazyDeclPtr StdNamespace; 499 500 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 501 /// standard library. 502 LazyDeclPtr StdBadAlloc; 503 504 /// \brief The C++ "std::initializer_list" template, which is defined in 505 /// <initializer_list>. 506 ClassTemplateDecl *StdInitializerList; 507 508 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 509 RecordDecl *CXXTypeInfoDecl; 510 511 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 512 RecordDecl *MSVCGuidDecl; 513 514 /// A flag to remember whether the implicit forms of operator new and delete 515 /// have been declared. 516 bool GlobalNewDeleteDeclared; 517 518 519 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 520 /// call was found yet. 521 bool ObjCShouldCallSuperDealloc; 522 /// A flag that is set when parsing a -finalize method and no [super finalize] 523 /// call was found yet. 524 bool ObjCShouldCallSuperFinalize; 525 526 /// \brief Describes how the expressions currently being parsed are 527 /// evaluated at run-time, if at all. 528 enum ExpressionEvaluationContext { 529 /// \brief The current expression and its subexpressions occur within an 530 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 531 /// \c sizeof, where the type of the expression may be significant but 532 /// no code will be generated to evaluate the value of the expression at 533 /// run time. 534 Unevaluated, 535 536 /// \brief The current context is "potentially evaluated" in C++11 terms, 537 /// but the expression is evaluated at compile-time (like the values of 538 /// cases in a switch statment). 539 ConstantEvaluated, 540 541 /// \brief The current expression is potentially evaluated at run time, 542 /// which means that code may be generated to evaluate the value of the 543 /// expression at run time. 544 PotentiallyEvaluated, 545 546 /// \brief The current expression is potentially evaluated, but any 547 /// declarations referenced inside that expression are only used if 548 /// in fact the current expression is used. 549 /// 550 /// This value is used when parsing default function arguments, for which 551 /// we would like to provide diagnostics (e.g., passing non-POD arguments 552 /// through varargs) but do not want to mark declarations as "referenced" 553 /// until the default argument is used. 554 PotentiallyEvaluatedIfUsed 555 }; 556 557 /// \brief Data structure used to record current or nested 558 /// expression evaluation contexts. 559 struct ExpressionEvaluationContextRecord { 560 /// \brief The expression evaluation context. 561 ExpressionEvaluationContext Context; 562 563 /// \brief Whether the enclosing context needed a cleanup. 564 bool ParentNeedsCleanups; 565 566 /// \brief Whether we are in a decltype expression. 567 bool IsDecltype; 568 569 /// \brief The number of active cleanup objects when we entered 570 /// this expression evaluation context. 571 unsigned NumCleanupObjects; 572 573 llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs; 574 575 /// \brief The lambdas that are present within this context, if it 576 /// is indeed an unevaluated context. 577 llvm::SmallVector<LambdaExpr *, 2> Lambdas; 578 579 /// \brief The declaration that provides context for the lambda expression 580 /// if the normal declaration context does not suffice, e.g., in a 581 /// default function argument. 582 Decl *LambdaContextDecl; 583 584 /// \brief The context information used to mangle lambda expressions 585 /// within this context. 586 /// 587 /// This mangling information is allocated lazily, since most contexts 588 /// do not have lambda expressions. 589 LambdaMangleContext *LambdaMangle; 590 591 /// \brief If we are processing a decltype type, a set of call expressions 592 /// for which we have deferred checking the completeness of the return type. 593 llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls; 594 595 /// \brief If we are processing a decltype type, a set of temporary binding 596 /// expressions for which we have deferred checking the destructor. 597 llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds; 598 599 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 600 unsigned NumCleanupObjects, 601 bool ParentNeedsCleanups, 602 Decl *LambdaContextDecl, 603 bool IsDecltype) 604 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 605 IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects), 606 LambdaContextDecl(LambdaContextDecl), LambdaMangle() { } 607 608 ~ExpressionEvaluationContextRecord() { 609 delete LambdaMangle; 610 } 611 612 /// \brief Retrieve the mangling context for lambdas. 613 LambdaMangleContext &getLambdaMangleContext() { 614 assert(LambdaContextDecl && "Need to have a lambda context declaration"); 615 if (!LambdaMangle) 616 LambdaMangle = new LambdaMangleContext; 617 return *LambdaMangle; 618 } 619 }; 620 621 /// A stack of expression evaluation contexts. 622 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 623 624 /// SpecialMemberOverloadResult - The overloading result for a special member 625 /// function. 626 /// 627 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 628 /// integer is used to determine whether we have a parameter qualification 629 /// match, the second-lowest is whether we had success in resolving the 630 /// overload to a unique non-deleted function. 631 /// 632 /// The ConstParamMatch bit represents whether, when looking up a copy 633 /// constructor or assignment operator, we found a potential copy 634 /// constructor/assignment operator whose first parameter is const-qualified. 635 /// This is used for determining parameter types of other objects and is 636 /// utterly meaningless on other types of special members. 637 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 638 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 639 public: 640 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 641 : FastFoldingSetNode(ID) 642 {} 643 644 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 645 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 646 647 bool hasSuccess() const { return Pair.getInt() & 0x1; } 648 void setSuccess(bool B) { 649 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 650 } 651 652 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 653 void setConstParamMatch(bool B) { 654 Pair.setInt(B << 1 | unsigned(hasSuccess())); 655 } 656 }; 657 658 /// \brief A cache of special member function overload resolution results 659 /// for C++ records. 660 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 661 662 /// \brief The kind of translation unit we are processing. 663 /// 664 /// When we're processing a complete translation unit, Sema will perform 665 /// end-of-translation-unit semantic tasks (such as creating 666 /// initializers for tentative definitions in C) once parsing has 667 /// completed. Modules and precompiled headers perform different kinds of 668 /// checks. 669 TranslationUnitKind TUKind; 670 671 llvm::BumpPtrAllocator BumpAlloc; 672 673 /// \brief The number of SFINAE diagnostics that have been trapped. 674 unsigned NumSFINAEErrors; 675 676 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 677 UnparsedDefaultArgInstantiationsMap; 678 679 /// \brief A mapping from parameters with unparsed default arguments to the 680 /// set of instantiations of each parameter. 681 /// 682 /// This mapping is a temporary data structure used when parsing 683 /// nested class templates or nested classes of class templates, 684 /// where we might end up instantiating an inner class before the 685 /// default arguments of its methods have been parsed. 686 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 687 688 // Contains the locations of the beginning of unparsed default 689 // argument locations. 690 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 691 692 /// UndefinedInternals - all the used, undefined objects with 693 /// internal linkage in this translation unit. 694 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 695 696 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 697 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 698 699 /// Method Pool - allows efficient lookup when typechecking messages to "id". 700 /// We need to maintain a list, since selectors can have differing signatures 701 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 702 /// of selectors are "overloaded"). 703 GlobalMethodPool MethodPool; 704 705 /// Method selectors used in a @selector expression. Used for implementation 706 /// of -Wselector. 707 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 708 709 void ReadMethodPool(Selector Sel); 710 711 /// Private Helper predicate to check for 'self'. 712 bool isSelfExpr(Expr *RExpr); 713public: 714 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 715 TranslationUnitKind TUKind = TU_Complete, 716 CodeCompleteConsumer *CompletionConsumer = 0); 717 ~Sema(); 718 719 /// \brief Perform initialization that occurs after the parser has been 720 /// initialized but before it parses anything. 721 void Initialize(); 722 723 const LangOptions &getLangOptions() const { return LangOpts; } 724 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 725 FPOptions &getFPOptions() { return FPFeatures; } 726 727 DiagnosticsEngine &getDiagnostics() const { return Diags; } 728 SourceManager &getSourceManager() const { return SourceMgr; } 729 const TargetAttributesSema &getTargetAttributesSema() const; 730 Preprocessor &getPreprocessor() const { return PP; } 731 ASTContext &getASTContext() const { return Context; } 732 ASTConsumer &getASTConsumer() const { return Consumer; } 733 ASTMutationListener *getASTMutationListener() const; 734 735 void PrintStats() const; 736 737 /// \brief Helper class that creates diagnostics with optional 738 /// template instantiation stacks. 739 /// 740 /// This class provides a wrapper around the basic DiagnosticBuilder 741 /// class that emits diagnostics. SemaDiagnosticBuilder is 742 /// responsible for emitting the diagnostic (as DiagnosticBuilder 743 /// does) and, if the diagnostic comes from inside a template 744 /// instantiation, printing the template instantiation stack as 745 /// well. 746 class SemaDiagnosticBuilder : public DiagnosticBuilder { 747 Sema &SemaRef; 748 unsigned DiagID; 749 750 public: 751 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 752 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 753 754 explicit SemaDiagnosticBuilder(Sema &SemaRef) 755 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 756 757 ~SemaDiagnosticBuilder(); 758 }; 759 760 /// \brief Emit a diagnostic. 761 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 762 763 /// \brief Emit a partial diagnostic. 764 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 765 766 /// \brief Build a partial diagnostic. 767 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 768 769 bool findMacroSpelling(SourceLocation &loc, StringRef name); 770 771 /// \brief Get a string to suggest for zero-initialization of a type. 772 const char *getFixItZeroInitializerForType(QualType T) const; 773 774 ExprResult Owned(Expr* E) { return E; } 775 ExprResult Owned(ExprResult R) { return R; } 776 StmtResult Owned(Stmt* S) { return S; } 777 778 void ActOnEndOfTranslationUnit(); 779 780 void CheckDelegatingCtorCycles(); 781 782 Scope *getScopeForContext(DeclContext *Ctx); 783 784 void PushFunctionScope(); 785 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 786 void PushLambdaScope(CXXRecordDecl *Lambda, CXXMethodDecl *CallOperator); 787 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 788 const Decl *D = 0, const BlockExpr *blkExpr = 0); 789 790 sema::FunctionScopeInfo *getCurFunction() const { 791 return FunctionScopes.back(); 792 } 793 794 void PushCompoundScope(); 795 void PopCompoundScope(); 796 797 sema::CompoundScopeInfo &getCurCompoundScope() const; 798 799 bool hasAnyUnrecoverableErrorsInThisFunction() const; 800 801 /// \brief Retrieve the current block, if any. 802 sema::BlockScopeInfo *getCurBlock(); 803 804 /// \brief Retrieve the current lambda expression, if any. 805 sema::LambdaScopeInfo *getCurLambda(); 806 807 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 808 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 809 810 //===--------------------------------------------------------------------===// 811 // Type Analysis / Processing: SemaType.cpp. 812 // 813 814 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 815 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 816 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 817 } 818 QualType BuildPointerType(QualType T, 819 SourceLocation Loc, DeclarationName Entity); 820 QualType BuildReferenceType(QualType T, bool LValueRef, 821 SourceLocation Loc, DeclarationName Entity); 822 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 823 Expr *ArraySize, unsigned Quals, 824 SourceRange Brackets, DeclarationName Entity); 825 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 826 SourceLocation AttrLoc); 827 QualType BuildFunctionType(QualType T, 828 QualType *ParamTypes, unsigned NumParamTypes, 829 bool Variadic, bool HasTrailingReturn, 830 unsigned Quals, RefQualifierKind RefQualifier, 831 SourceLocation Loc, DeclarationName Entity, 832 FunctionType::ExtInfo Info); 833 QualType BuildMemberPointerType(QualType T, QualType Class, 834 SourceLocation Loc, 835 DeclarationName Entity); 836 QualType BuildBlockPointerType(QualType T, 837 SourceLocation Loc, DeclarationName Entity); 838 QualType BuildParenType(QualType T); 839 QualType BuildAtomicType(QualType T, SourceLocation Loc); 840 841 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 842 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 843 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 844 TypeSourceInfo *ReturnTypeInfo); 845 /// \brief Package the given type and TSI into a ParsedType. 846 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 847 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 848 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 849 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 850 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 851 bool CheckDistantExceptionSpec(QualType T); 852 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 853 bool CheckEquivalentExceptionSpec( 854 const FunctionProtoType *Old, SourceLocation OldLoc, 855 const FunctionProtoType *New, SourceLocation NewLoc); 856 bool CheckEquivalentExceptionSpec( 857 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 858 const FunctionProtoType *Old, SourceLocation OldLoc, 859 const FunctionProtoType *New, SourceLocation NewLoc, 860 bool *MissingExceptionSpecification = 0, 861 bool *MissingEmptyExceptionSpecification = 0, 862 bool AllowNoexceptAllMatchWithNoSpec = false, 863 bool IsOperatorNew = false); 864 bool CheckExceptionSpecSubset( 865 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 866 const FunctionProtoType *Superset, SourceLocation SuperLoc, 867 const FunctionProtoType *Subset, SourceLocation SubLoc); 868 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 869 const FunctionProtoType *Target, SourceLocation TargetLoc, 870 const FunctionProtoType *Source, SourceLocation SourceLoc); 871 872 TypeResult ActOnTypeName(Scope *S, Declarator &D); 873 874 /// \brief The parser has parsed the context-sensitive type 'instancetype' 875 /// in an Objective-C message declaration. Return the appropriate type. 876 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 877 878 bool RequireCompleteType(SourceLocation Loc, QualType T, 879 const PartialDiagnostic &PD, 880 std::pair<SourceLocation, PartialDiagnostic> Note); 881 bool RequireCompleteType(SourceLocation Loc, QualType T, 882 const PartialDiagnostic &PD); 883 bool RequireCompleteType(SourceLocation Loc, QualType T, 884 unsigned DiagID); 885 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 886 std::pair<SourceLocation, 887 PartialDiagnostic> Note); 888 889 bool RequireLiteralType(SourceLocation Loc, QualType T, 890 const PartialDiagnostic &PD); 891 892 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 893 const CXXScopeSpec &SS, QualType T); 894 895 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 896 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 897 QualType BuildUnaryTransformType(QualType BaseType, 898 UnaryTransformType::UTTKind UKind, 899 SourceLocation Loc); 900 901 //===--------------------------------------------------------------------===// 902 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 903 // 904 905 /// List of decls defined in a function prototype. This contains EnumConstants 906 /// that incorrectly end up in translation unit scope because there is no 907 /// function to pin them on. ActOnFunctionDeclarator reads this list and patches 908 /// them into the FunctionDecl. 909 std::vector<NamedDecl*> DeclsInPrototypeScope; 910 bool InFunctionDeclarator; 911 912 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 913 914 void DiagnoseUseOfUnimplementedSelectors(); 915 916 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 917 Scope *S, CXXScopeSpec *SS = 0, 918 bool isClassName = false, 919 bool HasTrailingDot = false, 920 ParsedType ObjectType = ParsedType(), 921 bool IsCtorOrDtorName = false, 922 bool WantNontrivialTypeSourceInfo = false, 923 IdentifierInfo **CorrectedII = 0); 924 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 925 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 926 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 927 SourceLocation IILoc, 928 Scope *S, 929 CXXScopeSpec *SS, 930 ParsedType &SuggestedType); 931 932 /// \brief Describes the result of the name lookup and resolution performed 933 /// by \c ClassifyName(). 934 enum NameClassificationKind { 935 NC_Unknown, 936 NC_Error, 937 NC_Keyword, 938 NC_Type, 939 NC_Expression, 940 NC_NestedNameSpecifier, 941 NC_TypeTemplate, 942 NC_FunctionTemplate 943 }; 944 945 class NameClassification { 946 NameClassificationKind Kind; 947 ExprResult Expr; 948 TemplateName Template; 949 ParsedType Type; 950 const IdentifierInfo *Keyword; 951 952 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 953 954 public: 955 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 956 957 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 958 959 NameClassification(const IdentifierInfo *Keyword) 960 : Kind(NC_Keyword), Keyword(Keyword) { } 961 962 static NameClassification Error() { 963 return NameClassification(NC_Error); 964 } 965 966 static NameClassification Unknown() { 967 return NameClassification(NC_Unknown); 968 } 969 970 static NameClassification NestedNameSpecifier() { 971 return NameClassification(NC_NestedNameSpecifier); 972 } 973 974 static NameClassification TypeTemplate(TemplateName Name) { 975 NameClassification Result(NC_TypeTemplate); 976 Result.Template = Name; 977 return Result; 978 } 979 980 static NameClassification FunctionTemplate(TemplateName Name) { 981 NameClassification Result(NC_FunctionTemplate); 982 Result.Template = Name; 983 return Result; 984 } 985 986 NameClassificationKind getKind() const { return Kind; } 987 988 ParsedType getType() const { 989 assert(Kind == NC_Type); 990 return Type; 991 } 992 993 ExprResult getExpression() const { 994 assert(Kind == NC_Expression); 995 return Expr; 996 } 997 998 TemplateName getTemplateName() const { 999 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1000 return Template; 1001 } 1002 1003 TemplateNameKind getTemplateNameKind() const { 1004 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 1005 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 1006 } 1007}; 1008 1009 /// \brief Perform name lookup on the given name, classifying it based on 1010 /// the results of name lookup and the following token. 1011 /// 1012 /// This routine is used by the parser to resolve identifiers and help direct 1013 /// parsing. When the identifier cannot be found, this routine will attempt 1014 /// to correct the typo and classify based on the resulting name. 1015 /// 1016 /// \param S The scope in which we're performing name lookup. 1017 /// 1018 /// \param SS The nested-name-specifier that precedes the name. 1019 /// 1020 /// \param Name The identifier. If typo correction finds an alternative name, 1021 /// this pointer parameter will be updated accordingly. 1022 /// 1023 /// \param NameLoc The location of the identifier. 1024 /// 1025 /// \param NextToken The token following the identifier. Used to help 1026 /// disambiguate the name. 1027 NameClassification ClassifyName(Scope *S, 1028 CXXScopeSpec &SS, 1029 IdentifierInfo *&Name, 1030 SourceLocation NameLoc, 1031 const Token &NextToken); 1032 1033 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1034 1035 Decl *HandleDeclarator(Scope *S, Declarator &D, 1036 MultiTemplateParamsArg TemplateParameterLists); 1037 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1038 const LookupResult &Previous, 1039 Scope *S); 1040 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1041 void DiagnoseFunctionSpecifiers(Declarator& D); 1042 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1043 void CheckShadow(Scope *S, VarDecl *D); 1044 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1045 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1046 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1047 TypeSourceInfo *TInfo, 1048 LookupResult &Previous); 1049 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1050 LookupResult &Previous, bool &Redeclaration); 1051 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1052 TypeSourceInfo *TInfo, 1053 LookupResult &Previous, 1054 MultiTemplateParamsArg TemplateParamLists); 1055 // Returns true if the variable declaration is a redeclaration 1056 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1057 void CheckCompleteVariableDeclaration(VarDecl *var); 1058 void ActOnStartFunctionDeclarator(); 1059 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1060 TypeSourceInfo *TInfo, 1061 LookupResult &Previous, 1062 MultiTemplateParamsArg TemplateParamLists, 1063 bool &AddToScope); 1064 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1065 1066 bool CheckConstexprFunctionDecl(const FunctionDecl *FD); 1067 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1068 1069 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1070 // Returns true if the function declaration is a redeclaration 1071 bool CheckFunctionDeclaration(Scope *S, 1072 FunctionDecl *NewFD, LookupResult &Previous, 1073 bool IsExplicitSpecialization); 1074 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1075 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1076 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1077 SourceLocation Loc, 1078 QualType T); 1079 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1080 SourceLocation NameLoc, IdentifierInfo *Name, 1081 QualType T, TypeSourceInfo *TSInfo, 1082 StorageClass SC, StorageClass SCAsWritten); 1083 void ActOnParamDefaultArgument(Decl *param, 1084 SourceLocation EqualLoc, 1085 Expr *defarg); 1086 void ActOnParamUnparsedDefaultArgument(Decl *param, 1087 SourceLocation EqualLoc, 1088 SourceLocation ArgLoc); 1089 void ActOnParamDefaultArgumentError(Decl *param); 1090 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1091 SourceLocation EqualLoc); 1092 1093 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1094 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1095 bool TypeMayContainAuto); 1096 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1097 void ActOnInitializerError(Decl *Dcl); 1098 void ActOnCXXForRangeDecl(Decl *D); 1099 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1100 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1101 void FinalizeDeclaration(Decl *D); 1102 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1103 Decl **Group, 1104 unsigned NumDecls); 1105 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1106 bool TypeMayContainAuto = true); 1107 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1108 SourceLocation LocAfterDecls); 1109 void CheckForFunctionRedefinition(FunctionDecl *FD); 1110 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1111 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1112 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1113 1114 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1115 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1116 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1117 1118 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1119 /// attribute for which parsing is delayed. 1120 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1121 1122 /// \brief Diagnose any unused parameters in the given sequence of 1123 /// ParmVarDecl pointers. 1124 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1125 ParmVarDecl * const *End); 1126 1127 /// \brief Diagnose whether the size of parameters or return value of a 1128 /// function or obj-c method definition is pass-by-value and larger than a 1129 /// specified threshold. 1130 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1131 ParmVarDecl * const *End, 1132 QualType ReturnTy, 1133 NamedDecl *D); 1134 1135 void DiagnoseInvalidJumps(Stmt *Body); 1136 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1137 SourceLocation AsmLoc, 1138 SourceLocation RParenLoc); 1139 1140 /// \brief The parser has processed a module import declaration. 1141 /// 1142 /// \param AtLoc The location of the '@' symbol, if any. 1143 /// 1144 /// \param ImportLoc The location of the 'import' keyword. 1145 /// 1146 /// \param Path The module access path. 1147 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1148 ModuleIdPath Path); 1149 1150 /// \brief Retrieve a suitable printing policy. 1151 PrintingPolicy getPrintingPolicy() const { 1152 return getPrintingPolicy(Context, PP); 1153 } 1154 1155 /// \brief Retrieve a suitable printing policy. 1156 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1157 const Preprocessor &PP); 1158 1159 /// Scope actions. 1160 void ActOnPopScope(SourceLocation Loc, Scope *S); 1161 void ActOnTranslationUnitScope(Scope *S); 1162 1163 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1164 DeclSpec &DS); 1165 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1166 DeclSpec &DS, 1167 MultiTemplateParamsArg TemplateParams); 1168 1169 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1170 AccessSpecifier AS, 1171 RecordDecl *Record); 1172 1173 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1174 RecordDecl *Record); 1175 1176 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1177 TagTypeKind NewTag, bool isDefinition, 1178 SourceLocation NewTagLoc, 1179 const IdentifierInfo &Name); 1180 1181 enum TagUseKind { 1182 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1183 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1184 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1185 TUK_Friend // Friend declaration: 'friend struct foo;' 1186 }; 1187 1188 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1189 SourceLocation KWLoc, CXXScopeSpec &SS, 1190 IdentifierInfo *Name, SourceLocation NameLoc, 1191 AttributeList *Attr, AccessSpecifier AS, 1192 SourceLocation ModulePrivateLoc, 1193 MultiTemplateParamsArg TemplateParameterLists, 1194 bool &OwnedDecl, bool &IsDependent, 1195 SourceLocation ScopedEnumKWLoc, 1196 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1197 1198 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1199 unsigned TagSpec, SourceLocation TagLoc, 1200 CXXScopeSpec &SS, 1201 IdentifierInfo *Name, SourceLocation NameLoc, 1202 AttributeList *Attr, 1203 MultiTemplateParamsArg TempParamLists); 1204 1205 TypeResult ActOnDependentTag(Scope *S, 1206 unsigned TagSpec, 1207 TagUseKind TUK, 1208 const CXXScopeSpec &SS, 1209 IdentifierInfo *Name, 1210 SourceLocation TagLoc, 1211 SourceLocation NameLoc); 1212 1213 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1214 IdentifierInfo *ClassName, 1215 SmallVectorImpl<Decl *> &Decls); 1216 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1217 Declarator &D, Expr *BitfieldWidth); 1218 1219 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1220 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1221 AccessSpecifier AS); 1222 1223 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1224 TypeSourceInfo *TInfo, 1225 RecordDecl *Record, SourceLocation Loc, 1226 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1227 SourceLocation TSSL, 1228 AccessSpecifier AS, NamedDecl *PrevDecl, 1229 Declarator *D = 0); 1230 1231 enum CXXSpecialMember { 1232 CXXDefaultConstructor, 1233 CXXCopyConstructor, 1234 CXXMoveConstructor, 1235 CXXCopyAssignment, 1236 CXXMoveAssignment, 1237 CXXDestructor, 1238 CXXInvalid 1239 }; 1240 bool CheckNontrivialField(FieldDecl *FD); 1241 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1242 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1243 void ActOnLastBitfield(SourceLocation DeclStart, 1244 SmallVectorImpl<Decl *> &AllIvarDecls); 1245 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1246 Declarator &D, Expr *BitfieldWidth, 1247 tok::ObjCKeywordKind visibility); 1248 1249 // This is used for both record definitions and ObjC interface declarations. 1250 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1251 llvm::ArrayRef<Decl *> Fields, 1252 SourceLocation LBrac, SourceLocation RBrac, 1253 AttributeList *AttrList); 1254 1255 /// ActOnTagStartDefinition - Invoked when we have entered the 1256 /// scope of a tag's definition (e.g., for an enumeration, class, 1257 /// struct, or union). 1258 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1259 1260 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1261 1262 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1263 /// C++ record definition's base-specifiers clause and are starting its 1264 /// member declarations. 1265 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1266 SourceLocation FinalLoc, 1267 SourceLocation LBraceLoc); 1268 1269 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1270 /// the definition of a tag (enumeration, class, struct, or union). 1271 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1272 SourceLocation RBraceLoc); 1273 1274 void ActOnObjCContainerFinishDefinition(); 1275 1276 /// \brief Invoked when we must temporarily exit the objective-c container 1277 /// scope for parsing/looking-up C constructs. 1278 /// 1279 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1280 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1281 void ActOnObjCReenterContainerContext(DeclContext *DC); 1282 1283 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1284 /// error parsing the definition of a tag. 1285 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1286 1287 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1288 EnumConstantDecl *LastEnumConst, 1289 SourceLocation IdLoc, 1290 IdentifierInfo *Id, 1291 Expr *val); 1292 1293 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1294 SourceLocation IdLoc, IdentifierInfo *Id, 1295 AttributeList *Attrs, 1296 SourceLocation EqualLoc, Expr *Val); 1297 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1298 SourceLocation RBraceLoc, Decl *EnumDecl, 1299 Decl **Elements, unsigned NumElements, 1300 Scope *S, AttributeList *Attr); 1301 1302 DeclContext *getContainingDC(DeclContext *DC); 1303 1304 /// Set the current declaration context until it gets popped. 1305 void PushDeclContext(Scope *S, DeclContext *DC); 1306 void PopDeclContext(); 1307 1308 /// EnterDeclaratorContext - Used when we must lookup names in the context 1309 /// of a declarator's nested name specifier. 1310 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1311 void ExitDeclaratorContext(Scope *S); 1312 1313 /// Push the parameters of D, which must be a function, into scope. 1314 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1315 void ActOnExitFunctionContext() { PopDeclContext(); } 1316 1317 DeclContext *getFunctionLevelDeclContext(); 1318 1319 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1320 /// to the function decl for the function being parsed. If we're currently 1321 /// in a 'block', this returns the containing context. 1322 FunctionDecl *getCurFunctionDecl(); 1323 1324 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1325 /// the method decl for the method being parsed. If we're currently 1326 /// in a 'block', this returns the containing context. 1327 ObjCMethodDecl *getCurMethodDecl(); 1328 1329 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1330 /// or C function we're in, otherwise return null. If we're currently 1331 /// in a 'block', this returns the containing context. 1332 NamedDecl *getCurFunctionOrMethodDecl(); 1333 1334 /// Add this decl to the scope shadowed decl chains. 1335 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1336 1337 /// \brief Make the given externally-produced declaration visible at the 1338 /// top level scope. 1339 /// 1340 /// \param D The externally-produced declaration to push. 1341 /// 1342 /// \param Name The name of the externally-produced declaration. 1343 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1344 1345 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1346 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1347 /// true if 'D' belongs to the given declaration context. 1348 /// 1349 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1350 /// whether the declaration is in scope for the purposes of explicit template 1351 /// instantiation or specialization. The default is false. 1352 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1353 bool ExplicitInstantiationOrSpecialization = false); 1354 1355 /// Finds the scope corresponding to the given decl context, if it 1356 /// happens to be an enclosing scope. Otherwise return NULL. 1357 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1358 1359 /// Subroutines of ActOnDeclarator(). 1360 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1361 TypeSourceInfo *TInfo); 1362 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1363 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1364 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1365 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1366 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1367 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1368 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1369 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1370 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1371 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1372 1373 // AssignmentAction - This is used by all the assignment diagnostic functions 1374 // to represent what is actually causing the operation 1375 enum AssignmentAction { 1376 AA_Assigning, 1377 AA_Passing, 1378 AA_Returning, 1379 AA_Converting, 1380 AA_Initializing, 1381 AA_Sending, 1382 AA_Casting 1383 }; 1384 1385 /// C++ Overloading. 1386 enum OverloadKind { 1387 /// This is a legitimate overload: the existing declarations are 1388 /// functions or function templates with different signatures. 1389 Ovl_Overload, 1390 1391 /// This is not an overload because the signature exactly matches 1392 /// an existing declaration. 1393 Ovl_Match, 1394 1395 /// This is not an overload because the lookup results contain a 1396 /// non-function. 1397 Ovl_NonFunction 1398 }; 1399 OverloadKind CheckOverload(Scope *S, 1400 FunctionDecl *New, 1401 const LookupResult &OldDecls, 1402 NamedDecl *&OldDecl, 1403 bool IsForUsingDecl); 1404 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1405 1406 /// \brief Checks availability of the function depending on the current 1407 /// function context.Inside an unavailable function,unavailability is ignored. 1408 /// 1409 /// \returns true if \arg FD is unavailable and current context is inside 1410 /// an available function, false otherwise. 1411 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1412 1413 ImplicitConversionSequence 1414 TryImplicitConversion(Expr *From, QualType ToType, 1415 bool SuppressUserConversions, 1416 bool AllowExplicit, 1417 bool InOverloadResolution, 1418 bool CStyle, 1419 bool AllowObjCWritebackConversion); 1420 1421 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1422 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1423 bool IsComplexPromotion(QualType FromType, QualType ToType); 1424 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1425 bool InOverloadResolution, 1426 QualType& ConvertedType, bool &IncompatibleObjC); 1427 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1428 QualType& ConvertedType, bool &IncompatibleObjC); 1429 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1430 QualType &ConvertedType); 1431 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1432 QualType& ConvertedType); 1433 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1434 const FunctionProtoType *NewType, 1435 unsigned *ArgPos = 0); 1436 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1437 QualType FromType, QualType ToType); 1438 1439 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1440 bool CheckPointerConversion(Expr *From, QualType ToType, 1441 CastKind &Kind, 1442 CXXCastPath& BasePath, 1443 bool IgnoreBaseAccess); 1444 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1445 bool InOverloadResolution, 1446 QualType &ConvertedType); 1447 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1448 CastKind &Kind, 1449 CXXCastPath &BasePath, 1450 bool IgnoreBaseAccess); 1451 bool IsQualificationConversion(QualType FromType, QualType ToType, 1452 bool CStyle, bool &ObjCLifetimeConversion); 1453 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1454 QualType &ResultTy); 1455 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1456 1457 1458 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1459 const VarDecl *NRVOCandidate, 1460 QualType ResultType, 1461 Expr *Value, 1462 bool AllowNRVO = true); 1463 1464 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1465 ExprResult Init); 1466 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1467 SourceLocation EqualLoc, 1468 ExprResult Init, 1469 bool TopLevelOfInitList = false, 1470 bool AllowExplicit = false); 1471 ExprResult PerformObjectArgumentInitialization(Expr *From, 1472 NestedNameSpecifier *Qualifier, 1473 NamedDecl *FoundDecl, 1474 CXXMethodDecl *Method); 1475 1476 ExprResult PerformContextuallyConvertToBool(Expr *From); 1477 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1478 1479 /// Contexts in which a converted constant expression is required. 1480 enum CCEKind { 1481 CCEK_CaseValue, ///< Expression in a case label. 1482 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1483 CCEK_TemplateArg ///< Value of a non-type template parameter. 1484 }; 1485 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1486 llvm::APSInt &Value, CCEKind CCE); 1487 1488 ExprResult 1489 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1490 const PartialDiagnostic &NotIntDiag, 1491 const PartialDiagnostic &IncompleteDiag, 1492 const PartialDiagnostic &ExplicitConvDiag, 1493 const PartialDiagnostic &ExplicitConvNote, 1494 const PartialDiagnostic &AmbigDiag, 1495 const PartialDiagnostic &AmbigNote, 1496 const PartialDiagnostic &ConvDiag, 1497 bool AllowScopedEnumerations); 1498 1499 ExprResult PerformObjectMemberConversion(Expr *From, 1500 NestedNameSpecifier *Qualifier, 1501 NamedDecl *FoundDecl, 1502 NamedDecl *Member); 1503 1504 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1505 // TODO: make this is a typesafe union. 1506 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1507 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1508 1509 void AddOverloadCandidate(FunctionDecl *Function, 1510 DeclAccessPair FoundDecl, 1511 llvm::ArrayRef<Expr *> Args, 1512 OverloadCandidateSet& CandidateSet, 1513 bool SuppressUserConversions = false, 1514 bool PartialOverloading = false, 1515 bool AllowExplicit = false); 1516 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1517 llvm::ArrayRef<Expr *> Args, 1518 OverloadCandidateSet& CandidateSet, 1519 bool SuppressUserConversions = false); 1520 void AddMethodCandidate(DeclAccessPair FoundDecl, 1521 QualType ObjectType, 1522 Expr::Classification ObjectClassification, 1523 Expr **Args, unsigned NumArgs, 1524 OverloadCandidateSet& CandidateSet, 1525 bool SuppressUserConversion = false); 1526 void AddMethodCandidate(CXXMethodDecl *Method, 1527 DeclAccessPair FoundDecl, 1528 CXXRecordDecl *ActingContext, QualType ObjectType, 1529 Expr::Classification ObjectClassification, 1530 llvm::ArrayRef<Expr *> Args, 1531 OverloadCandidateSet& CandidateSet, 1532 bool SuppressUserConversions = false); 1533 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1534 DeclAccessPair FoundDecl, 1535 CXXRecordDecl *ActingContext, 1536 TemplateArgumentListInfo *ExplicitTemplateArgs, 1537 QualType ObjectType, 1538 Expr::Classification ObjectClassification, 1539 llvm::ArrayRef<Expr *> Args, 1540 OverloadCandidateSet& CandidateSet, 1541 bool SuppressUserConversions = false); 1542 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1543 DeclAccessPair FoundDecl, 1544 TemplateArgumentListInfo *ExplicitTemplateArgs, 1545 llvm::ArrayRef<Expr *> Args, 1546 OverloadCandidateSet& CandidateSet, 1547 bool SuppressUserConversions = false); 1548 void AddConversionCandidate(CXXConversionDecl *Conversion, 1549 DeclAccessPair FoundDecl, 1550 CXXRecordDecl *ActingContext, 1551 Expr *From, QualType ToType, 1552 OverloadCandidateSet& CandidateSet); 1553 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1554 DeclAccessPair FoundDecl, 1555 CXXRecordDecl *ActingContext, 1556 Expr *From, QualType ToType, 1557 OverloadCandidateSet &CandidateSet); 1558 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1559 DeclAccessPair FoundDecl, 1560 CXXRecordDecl *ActingContext, 1561 const FunctionProtoType *Proto, 1562 Expr *Object, llvm::ArrayRef<Expr*> Args, 1563 OverloadCandidateSet& CandidateSet); 1564 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1565 SourceLocation OpLoc, 1566 Expr **Args, unsigned NumArgs, 1567 OverloadCandidateSet& CandidateSet, 1568 SourceRange OpRange = SourceRange()); 1569 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1570 Expr **Args, unsigned NumArgs, 1571 OverloadCandidateSet& CandidateSet, 1572 bool IsAssignmentOperator = false, 1573 unsigned NumContextualBoolArguments = 0); 1574 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1575 SourceLocation OpLoc, 1576 Expr **Args, unsigned NumArgs, 1577 OverloadCandidateSet& CandidateSet); 1578 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1579 bool Operator, SourceLocation Loc, 1580 llvm::ArrayRef<Expr *> Args, 1581 TemplateArgumentListInfo *ExplicitTemplateArgs, 1582 OverloadCandidateSet& CandidateSet, 1583 bool PartialOverloading = false, 1584 bool StdNamespaceIsAssociated = false); 1585 1586 // Emit as a 'note' the specific overload candidate 1587 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1588 1589 // Emit as a series of 'note's all template and non-templates 1590 // identified by the expression Expr 1591 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1592 1593 // [PossiblyAFunctionType] --> [Return] 1594 // NonFunctionType --> NonFunctionType 1595 // R (A) --> R(A) 1596 // R (*)(A) --> R (A) 1597 // R (&)(A) --> R (A) 1598 // R (S::*)(A) --> R (A) 1599 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1600 1601 FunctionDecl * 1602 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1603 QualType TargetType, 1604 bool Complain, 1605 DeclAccessPair &Found, 1606 bool *pHadMultipleCandidates = 0); 1607 1608 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1609 bool Complain = false, 1610 DeclAccessPair* Found = 0); 1611 1612 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1613 ExprResult &SrcExpr, 1614 bool DoFunctionPointerConverion = false, 1615 bool Complain = false, 1616 const SourceRange& OpRangeForComplaining = SourceRange(), 1617 QualType DestTypeForComplaining = QualType(), 1618 unsigned DiagIDForComplaining = 0); 1619 1620 1621 Expr *FixOverloadedFunctionReference(Expr *E, 1622 DeclAccessPair FoundDecl, 1623 FunctionDecl *Fn); 1624 ExprResult FixOverloadedFunctionReference(ExprResult, 1625 DeclAccessPair FoundDecl, 1626 FunctionDecl *Fn); 1627 1628 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1629 llvm::ArrayRef<Expr *> Args, 1630 OverloadCandidateSet &CandidateSet, 1631 bool PartialOverloading = false); 1632 1633 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1634 UnresolvedLookupExpr *ULE, 1635 SourceLocation LParenLoc, 1636 Expr **Args, unsigned NumArgs, 1637 SourceLocation RParenLoc, 1638 Expr *ExecConfig, 1639 bool AllowTypoCorrection=true); 1640 1641 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1642 unsigned Opc, 1643 const UnresolvedSetImpl &Fns, 1644 Expr *input); 1645 1646 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1647 unsigned Opc, 1648 const UnresolvedSetImpl &Fns, 1649 Expr *LHS, Expr *RHS); 1650 1651 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1652 SourceLocation RLoc, 1653 Expr *Base,Expr *Idx); 1654 1655 ExprResult 1656 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1657 SourceLocation LParenLoc, Expr **Args, 1658 unsigned NumArgs, SourceLocation RParenLoc); 1659 ExprResult 1660 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1661 Expr **Args, unsigned NumArgs, 1662 SourceLocation RParenLoc); 1663 1664 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1665 SourceLocation OpLoc); 1666 1667 /// CheckCallReturnType - Checks that a call expression's return type is 1668 /// complete. Returns true on failure. The location passed in is the location 1669 /// that best represents the call. 1670 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1671 CallExpr *CE, FunctionDecl *FD); 1672 1673 /// Helpers for dealing with blocks and functions. 1674 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1675 bool CheckParameterNames); 1676 void CheckCXXDefaultArguments(FunctionDecl *FD); 1677 void CheckExtraCXXDefaultArguments(Declarator &D); 1678 Scope *getNonFieldDeclScope(Scope *S); 1679 1680 /// \name Name lookup 1681 /// 1682 /// These routines provide name lookup that is used during semantic 1683 /// analysis to resolve the various kinds of names (identifiers, 1684 /// overloaded operator names, constructor names, etc.) into zero or 1685 /// more declarations within a particular scope. The major entry 1686 /// points are LookupName, which performs unqualified name lookup, 1687 /// and LookupQualifiedName, which performs qualified name lookup. 1688 /// 1689 /// All name lookup is performed based on some specific criteria, 1690 /// which specify what names will be visible to name lookup and how 1691 /// far name lookup should work. These criteria are important both 1692 /// for capturing language semantics (certain lookups will ignore 1693 /// certain names, for example) and for performance, since name 1694 /// lookup is often a bottleneck in the compilation of C++. Name 1695 /// lookup criteria is specified via the LookupCriteria enumeration. 1696 /// 1697 /// The results of name lookup can vary based on the kind of name 1698 /// lookup performed, the current language, and the translation 1699 /// unit. In C, for example, name lookup will either return nothing 1700 /// (no entity found) or a single declaration. In C++, name lookup 1701 /// can additionally refer to a set of overloaded functions or 1702 /// result in an ambiguity. All of the possible results of name 1703 /// lookup are captured by the LookupResult class, which provides 1704 /// the ability to distinguish among them. 1705 //@{ 1706 1707 /// @brief Describes the kind of name lookup to perform. 1708 enum LookupNameKind { 1709 /// Ordinary name lookup, which finds ordinary names (functions, 1710 /// variables, typedefs, etc.) in C and most kinds of names 1711 /// (functions, variables, members, types, etc.) in C++. 1712 LookupOrdinaryName = 0, 1713 /// Tag name lookup, which finds the names of enums, classes, 1714 /// structs, and unions. 1715 LookupTagName, 1716 /// Label name lookup. 1717 LookupLabel, 1718 /// Member name lookup, which finds the names of 1719 /// class/struct/union members. 1720 LookupMemberName, 1721 /// Look up of an operator name (e.g., operator+) for use with 1722 /// operator overloading. This lookup is similar to ordinary name 1723 /// lookup, but will ignore any declarations that are class members. 1724 LookupOperatorName, 1725 /// Look up of a name that precedes the '::' scope resolution 1726 /// operator in C++. This lookup completely ignores operator, object, 1727 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1728 LookupNestedNameSpecifierName, 1729 /// Look up a namespace name within a C++ using directive or 1730 /// namespace alias definition, ignoring non-namespace names (C++ 1731 /// [basic.lookup.udir]p1). 1732 LookupNamespaceName, 1733 /// Look up all declarations in a scope with the given name, 1734 /// including resolved using declarations. This is appropriate 1735 /// for checking redeclarations for a using declaration. 1736 LookupUsingDeclName, 1737 /// Look up an ordinary name that is going to be redeclared as a 1738 /// name with linkage. This lookup ignores any declarations that 1739 /// are outside of the current scope unless they have linkage. See 1740 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1741 LookupRedeclarationWithLinkage, 1742 /// Look up the name of an Objective-C protocol. 1743 LookupObjCProtocolName, 1744 /// Look up implicit 'self' parameter of an objective-c method. 1745 LookupObjCImplicitSelfParam, 1746 /// \brief Look up any declaration with any name. 1747 LookupAnyName 1748 }; 1749 1750 /// \brief Specifies whether (or how) name lookup is being performed for a 1751 /// redeclaration (vs. a reference). 1752 enum RedeclarationKind { 1753 /// \brief The lookup is a reference to this name that is not for the 1754 /// purpose of redeclaring the name. 1755 NotForRedeclaration = 0, 1756 /// \brief The lookup results will be used for redeclaration of a name, 1757 /// if an entity by that name already exists. 1758 ForRedeclaration 1759 }; 1760 1761 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1762 CXXSpecialMember SM, 1763 bool ConstArg, 1764 bool VolatileArg, 1765 bool RValueThis, 1766 bool ConstThis, 1767 bool VolatileThis); 1768 1769private: 1770 bool CppLookupName(LookupResult &R, Scope *S); 1771 1772 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1773 // 1774 // The boolean value will be true to indicate that the namespace was loaded 1775 // from an AST/PCH file, or false otherwise. 1776 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1777 1778 /// \brief Whether we have already loaded known namespaces from an extenal 1779 /// source. 1780 bool LoadedExternalKnownNamespaces; 1781 1782public: 1783 /// \brief Look up a name, looking for a single declaration. Return 1784 /// null if the results were absent, ambiguous, or overloaded. 1785 /// 1786 /// It is preferable to use the elaborated form and explicitly handle 1787 /// ambiguity and overloaded. 1788 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1789 SourceLocation Loc, 1790 LookupNameKind NameKind, 1791 RedeclarationKind Redecl 1792 = NotForRedeclaration); 1793 bool LookupName(LookupResult &R, Scope *S, 1794 bool AllowBuiltinCreation = false); 1795 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1796 bool InUnqualifiedLookup = false); 1797 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1798 bool AllowBuiltinCreation = false, 1799 bool EnteringContext = false); 1800 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1801 RedeclarationKind Redecl 1802 = NotForRedeclaration); 1803 1804 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1805 QualType T1, QualType T2, 1806 UnresolvedSetImpl &Functions); 1807 1808 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1809 SourceLocation GnuLabelLoc = SourceLocation()); 1810 1811 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1812 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1813 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1814 unsigned Quals, 1815 bool *ConstParam = 0); 1816 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1817 bool RValueThis, unsigned ThisQuals, 1818 bool *ConstParam = 0); 1819 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1820 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1821 unsigned ThisQuals); 1822 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1823 1824 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1825 SourceLocation Loc, 1826 llvm::ArrayRef<Expr *> Args, 1827 ADLResult &Functions, 1828 bool StdNamespaceIsAssociated = false); 1829 1830 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1831 VisibleDeclConsumer &Consumer, 1832 bool IncludeGlobalScope = true); 1833 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1834 VisibleDeclConsumer &Consumer, 1835 bool IncludeGlobalScope = true); 1836 1837 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1838 Sema::LookupNameKind LookupKind, 1839 Scope *S, CXXScopeSpec *SS, 1840 CorrectionCandidateCallback &CCC, 1841 DeclContext *MemberContext = 0, 1842 bool EnteringContext = false, 1843 const ObjCObjectPointerType *OPT = 0); 1844 1845 void FindAssociatedClassesAndNamespaces(llvm::ArrayRef<Expr *> Args, 1846 AssociatedNamespaceSet &AssociatedNamespaces, 1847 AssociatedClassSet &AssociatedClasses); 1848 1849 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1850 bool ConsiderLinkage, 1851 bool ExplicitInstantiationOrSpecialization); 1852 1853 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1854 //@} 1855 1856 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1857 SourceLocation IdLoc, 1858 bool TypoCorrection = false); 1859 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1860 Scope *S, bool ForRedeclaration, 1861 SourceLocation Loc); 1862 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1863 Scope *S); 1864 void AddKnownFunctionAttributes(FunctionDecl *FD); 1865 1866 // More parsing and symbol table subroutines. 1867 1868 // Decl attributes - this routine is the top level dispatcher. 1869 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1870 bool NonInheritable = true, bool Inheritable = true); 1871 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1872 bool NonInheritable = true, bool Inheritable = true); 1873 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1874 const AttributeList *AttrList); 1875 1876 void checkUnusedDeclAttributes(Declarator &D); 1877 1878 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1879 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1880 bool CheckNoReturnAttr(const AttributeList &attr); 1881 1882 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1883 bool &IncompleteImpl, unsigned DiagID); 1884 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1885 ObjCMethodDecl *MethodDecl, 1886 bool IsProtocolMethodDecl); 1887 1888 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1889 ObjCMethodDecl *Overridden, 1890 bool IsProtocolMethodDecl); 1891 1892 /// WarnExactTypedMethods - This routine issues a warning if method 1893 /// implementation declaration matches exactly that of its declaration. 1894 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1895 ObjCMethodDecl *MethodDecl, 1896 bool IsProtocolMethodDecl); 1897 1898 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1899 ObjCInterfaceDecl *IDecl); 1900 1901 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1902 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1903 1904 /// CheckProtocolMethodDefs - This routine checks unimplemented 1905 /// methods declared in protocol, and those referenced by it. 1906 /// \param IDecl - Used for checking for methods which may have been 1907 /// inherited. 1908 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1909 ObjCProtocolDecl *PDecl, 1910 bool& IncompleteImpl, 1911 const SelectorSet &InsMap, 1912 const SelectorSet &ClsMap, 1913 ObjCContainerDecl *CDecl); 1914 1915 /// CheckImplementationIvars - This routine checks if the instance variables 1916 /// listed in the implelementation match those listed in the interface. 1917 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1918 ObjCIvarDecl **Fields, unsigned nIvars, 1919 SourceLocation Loc); 1920 1921 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1922 /// remains unimplemented in the class or category @implementation. 1923 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1924 ObjCContainerDecl* IDecl, 1925 bool IncompleteImpl = false); 1926 1927 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1928 /// which must be implemented by this implementation. 1929 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1930 ObjCContainerDecl *CDecl, 1931 const SelectorSet &InsMap); 1932 1933 /// DefaultSynthesizeProperties - This routine default synthesizes all 1934 /// properties which must be synthesized in class's @implementation. 1935 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1936 ObjCInterfaceDecl *IDecl); 1937 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1938 1939 /// CollectImmediateProperties - This routine collects all properties in 1940 /// the class and its conforming protocols; but not those it its super class. 1941 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1942 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1943 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1944 1945 1946 /// LookupPropertyDecl - Looks up a property in the current class and all 1947 /// its protocols. 1948 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1949 IdentifierInfo *II); 1950 1951 /// Called by ActOnProperty to handle @property declarations in 1952 //// class extensions. 1953 Decl *HandlePropertyInClassExtension(Scope *S, 1954 SourceLocation AtLoc, 1955 FieldDeclarator &FD, 1956 Selector GetterSel, 1957 Selector SetterSel, 1958 const bool isAssign, 1959 const bool isReadWrite, 1960 const unsigned Attributes, 1961 const unsigned AttributesAsWritten, 1962 bool *isOverridingProperty, 1963 TypeSourceInfo *T, 1964 tok::ObjCKeywordKind MethodImplKind); 1965 1966 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1967 /// handle creating the ObjcPropertyDecl for a category or @interface. 1968 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1969 ObjCContainerDecl *CDecl, 1970 SourceLocation AtLoc, 1971 FieldDeclarator &FD, 1972 Selector GetterSel, 1973 Selector SetterSel, 1974 const bool isAssign, 1975 const bool isReadWrite, 1976 const unsigned Attributes, 1977 const unsigned AttributesAsWritten, 1978 TypeSourceInfo *T, 1979 tok::ObjCKeywordKind MethodImplKind, 1980 DeclContext *lexicalDC = 0); 1981 1982 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1983 /// warning) when atomic property has one but not the other user-declared 1984 /// setter or getter. 1985 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1986 ObjCContainerDecl* IDecl); 1987 1988 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1989 1990 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1991 1992 enum MethodMatchStrategy { 1993 MMS_loose, 1994 MMS_strict 1995 }; 1996 1997 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1998 /// true, or false, accordingly. 1999 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2000 const ObjCMethodDecl *PrevMethod, 2001 MethodMatchStrategy strategy = MMS_strict); 2002 2003 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2004 /// or protocol against those declared in their implementations. 2005 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2006 const SelectorSet &ClsMap, 2007 SelectorSet &InsMapSeen, 2008 SelectorSet &ClsMapSeen, 2009 ObjCImplDecl* IMPDecl, 2010 ObjCContainerDecl* IDecl, 2011 bool &IncompleteImpl, 2012 bool ImmediateClass, 2013 bool WarnCategoryMethodImpl=false); 2014 2015 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2016 /// category matches with those implemented in its primary class and 2017 /// warns each time an exact match is found. 2018 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2019 2020 /// \brief Add the given method to the list of globally-known methods. 2021 void addMethodToGlobalList(ObjCMethodList *List, ObjCMethodDecl *Method); 2022 2023private: 2024 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2025 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2026 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2027 2028 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2029 /// optionally warns if there are multiple signatures. 2030 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2031 bool receiverIdOrClass, 2032 bool warn, bool instance); 2033 2034public: 2035 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2036 /// unit are added to a global pool. This allows us to efficiently associate 2037 /// a selector with a method declaraation for purposes of typechecking 2038 /// messages sent to "id" (where the class of the object is unknown). 2039 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2040 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2041 } 2042 2043 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2044 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2045 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2046 } 2047 2048 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2049 /// pool. 2050 void AddAnyMethodToGlobalPool(Decl *D); 2051 2052 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2053 /// there are multiple signatures. 2054 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2055 bool receiverIdOrClass=false, 2056 bool warn=true) { 2057 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2058 warn, /*instance*/true); 2059 } 2060 2061 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2062 /// there are multiple signatures. 2063 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2064 bool receiverIdOrClass=false, 2065 bool warn=true) { 2066 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2067 warn, /*instance*/false); 2068 } 2069 2070 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2071 /// implementation. 2072 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2073 2074 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2075 /// initialization. 2076 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2077 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2078 2079 //===--------------------------------------------------------------------===// 2080 // Statement Parsing Callbacks: SemaStmt.cpp. 2081public: 2082 class FullExprArg { 2083 public: 2084 FullExprArg(Sema &actions) : E(0) { } 2085 2086 // FIXME: The const_cast here is ugly. RValue references would make this 2087 // much nicer (or we could duplicate a bunch of the move semantics 2088 // emulation code from Ownership.h). 2089 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2090 2091 ExprResult release() { 2092 return move(E); 2093 } 2094 2095 Expr *get() const { return E; } 2096 2097 Expr *operator->() { 2098 return E; 2099 } 2100 2101 private: 2102 // FIXME: No need to make the entire Sema class a friend when it's just 2103 // Sema::MakeFullExpr that needs access to the constructor below. 2104 friend class Sema; 2105 2106 explicit FullExprArg(Expr *expr) : E(expr) {} 2107 2108 Expr *E; 2109 }; 2110 2111 FullExprArg MakeFullExpr(Expr *Arg) { 2112 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2113 } 2114 2115 StmtResult ActOnExprStmt(FullExprArg Expr); 2116 2117 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2118 bool HasLeadingEmptyMacro = false); 2119 2120 void ActOnStartOfCompoundStmt(); 2121 void ActOnFinishOfCompoundStmt(); 2122 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2123 MultiStmtArg Elts, 2124 bool isStmtExpr); 2125 2126 /// \brief A RAII object to enter scope of a compound statement. 2127 class CompoundScopeRAII { 2128 public: 2129 CompoundScopeRAII(Sema &S): S(S) { 2130 S.ActOnStartOfCompoundStmt(); 2131 } 2132 2133 ~CompoundScopeRAII() { 2134 S.ActOnFinishOfCompoundStmt(); 2135 } 2136 2137 private: 2138 Sema &S; 2139 }; 2140 2141 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2142 SourceLocation StartLoc, 2143 SourceLocation EndLoc); 2144 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2145 StmtResult ActOnForEachLValueExpr(Expr *E); 2146 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2147 SourceLocation DotDotDotLoc, Expr *RHSVal, 2148 SourceLocation ColonLoc); 2149 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2150 2151 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2152 SourceLocation ColonLoc, 2153 Stmt *SubStmt, Scope *CurScope); 2154 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2155 SourceLocation ColonLoc, Stmt *SubStmt); 2156 2157 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2158 FullExprArg CondVal, Decl *CondVar, 2159 Stmt *ThenVal, 2160 SourceLocation ElseLoc, Stmt *ElseVal); 2161 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2162 Expr *Cond, 2163 Decl *CondVar); 2164 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2165 Stmt *Switch, Stmt *Body); 2166 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2167 FullExprArg Cond, 2168 Decl *CondVar, Stmt *Body); 2169 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2170 SourceLocation WhileLoc, 2171 SourceLocation CondLParen, Expr *Cond, 2172 SourceLocation CondRParen); 2173 2174 StmtResult ActOnForStmt(SourceLocation ForLoc, 2175 SourceLocation LParenLoc, 2176 Stmt *First, FullExprArg Second, 2177 Decl *SecondVar, 2178 FullExprArg Third, 2179 SourceLocation RParenLoc, 2180 Stmt *Body); 2181 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2182 Expr *collection); 2183 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2184 SourceLocation LParenLoc, 2185 Stmt *First, Expr *Second, 2186 SourceLocation RParenLoc, Stmt *Body); 2187 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2188 SourceLocation LParenLoc, Stmt *LoopVar, 2189 SourceLocation ColonLoc, Expr *Collection, 2190 SourceLocation RParenLoc); 2191 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2192 SourceLocation ColonLoc, 2193 Stmt *RangeDecl, Stmt *BeginEndDecl, 2194 Expr *Cond, Expr *Inc, 2195 Stmt *LoopVarDecl, 2196 SourceLocation RParenLoc); 2197 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2198 2199 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2200 SourceLocation LabelLoc, 2201 LabelDecl *TheDecl); 2202 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2203 SourceLocation StarLoc, 2204 Expr *DestExp); 2205 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2206 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2207 2208 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2209 bool AllowFunctionParameters); 2210 2211 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2212 StmtResult ActOnCapScopeReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2213 2214 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2215 bool IsSimple, bool IsVolatile, 2216 unsigned NumOutputs, unsigned NumInputs, 2217 IdentifierInfo **Names, 2218 MultiExprArg Constraints, 2219 MultiExprArg Exprs, 2220 Expr *AsmString, 2221 MultiExprArg Clobbers, 2222 SourceLocation RParenLoc, 2223 bool MSAsm = false); 2224 2225 2226 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2227 SourceLocation StartLoc, 2228 SourceLocation IdLoc, IdentifierInfo *Id, 2229 bool Invalid = false); 2230 2231 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2232 2233 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2234 Decl *Parm, Stmt *Body); 2235 2236 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2237 2238 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2239 MultiStmtArg Catch, Stmt *Finally); 2240 2241 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2242 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2243 Scope *CurScope); 2244 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2245 Expr *operand); 2246 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2247 Expr *SynchExpr, 2248 Stmt *SynchBody); 2249 2250 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2251 2252 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2253 SourceLocation StartLoc, 2254 SourceLocation IdLoc, 2255 IdentifierInfo *Id); 2256 2257 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2258 2259 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2260 Decl *ExDecl, Stmt *HandlerBlock); 2261 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2262 MultiStmtArg Handlers); 2263 2264 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2265 SourceLocation TryLoc, 2266 Stmt *TryBlock, 2267 Stmt *Handler); 2268 2269 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2270 Expr *FilterExpr, 2271 Stmt *Block); 2272 2273 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2274 Stmt *Block); 2275 2276 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2277 2278 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2279 2280 /// \brief If it's a file scoped decl that must warn if not used, keep track 2281 /// of it. 2282 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2283 2284 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2285 /// whose result is unused, warn. 2286 void DiagnoseUnusedExprResult(const Stmt *S); 2287 void DiagnoseUnusedDecl(const NamedDecl *ND); 2288 2289 /// Emit \p DiagID if statement located on \p StmtLoc has a suspicious null 2290 /// statement as a \p Body, and it is located on the same line. 2291 /// 2292 /// This helps prevent bugs due to typos, such as: 2293 /// if (condition); 2294 /// do_stuff(); 2295 void DiagnoseEmptyStmtBody(SourceLocation StmtLoc, 2296 const Stmt *Body, 2297 unsigned DiagID); 2298 2299 /// Warn if a for/while loop statement \p S, which is followed by 2300 /// \p PossibleBody, has a suspicious null statement as a body. 2301 void DiagnoseEmptyLoopBody(const Stmt *S, 2302 const Stmt *PossibleBody); 2303 2304 ParsingDeclState PushParsingDeclaration() { 2305 return DelayedDiagnostics.pushParsingDecl(); 2306 } 2307 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2308 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2309 } 2310 2311 typedef ProcessingContextState ParsingClassState; 2312 ParsingClassState PushParsingClass() { 2313 return DelayedDiagnostics.pushContext(); 2314 } 2315 void PopParsingClass(ParsingClassState state) { 2316 DelayedDiagnostics.popContext(state); 2317 } 2318 2319 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2320 SourceLocation Loc, 2321 const ObjCInterfaceDecl *UnknownObjCClass=0); 2322 2323 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2324 2325 bool makeUnavailableInSystemHeader(SourceLocation loc, 2326 StringRef message); 2327 2328 //===--------------------------------------------------------------------===// 2329 // Expression Parsing Callbacks: SemaExpr.cpp. 2330 2331 bool CanUseDecl(NamedDecl *D); 2332 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2333 const ObjCInterfaceDecl *UnknownObjCClass=0); 2334 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2335 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2336 ObjCMethodDecl *Getter, 2337 SourceLocation Loc); 2338 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2339 Expr **Args, unsigned NumArgs); 2340 2341 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext, 2342 Decl *LambdaContextDecl = 0, 2343 bool IsDecltype = false); 2344 2345 void PopExpressionEvaluationContext(); 2346 2347 void DiscardCleanupsInEvaluationContext(); 2348 2349 ExprResult TranformToPotentiallyEvaluated(Expr *E); 2350 ExprResult HandleExprEvaluationContextForTypeof(Expr *E); 2351 2352 // Functions for marking a declaration referenced. These functions also 2353 // contain the relevant logic for marking if a reference to a function or 2354 // variable is an odr-use (in the C++11 sense). There are separate variants 2355 // for expressions referring to a decl; these exist because odr-use marking 2356 // needs to be delayed for some constant variables when we build one of the 2357 // named expressions. 2358 void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D); 2359 void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func); 2360 void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var); 2361 void MarkBlockDeclRefReferenced(BlockDeclRefExpr *E); 2362 void MarkDeclRefReferenced(DeclRefExpr *E); 2363 void MarkMemberReferenced(MemberExpr *E); 2364 2365 void UpdateMarkingForLValueToRValue(Expr *E); 2366 void CleanupVarDeclMarking(); 2367 2368 enum TryCaptureKind { 2369 TryCapture_Implicit, TryCapture_ExplicitByVal, TryCapture_ExplicitByRef 2370 }; 2371 2372 /// \brief Try to capture the given variable. 2373 /// 2374 /// \param Var The variable to capture. 2375 /// 2376 /// \param Loc The location at which the capture occurs. 2377 /// 2378 /// \param Kind The kind of capture, which may be implicit (for either a 2379 /// block or a lambda), or explicit by-value or by-reference (for a lambda). 2380 /// 2381 /// \param EllipsisLoc The location of the ellipsis, if one is provided in 2382 /// an explicit lambda capture. 2383 /// 2384 /// \param BuildAndDiagnose Whether we are actually supposed to add the 2385 /// captures or diagnose errors. If false, this routine merely check whether 2386 /// the capture can occur without performing the capture itself or complaining 2387 /// if the variable cannot be captured. 2388 /// 2389 /// \param CaptureType Will be set to the type of the field used to capture 2390 /// this variable in the innermost block or lambda. Only valid when the 2391 /// variable can be captured. 2392 /// 2393 /// \param DeclRefType Will be set to the type of a refernce to the capture 2394 /// from within the current scope. Only valid when the variable can be 2395 /// captured. 2396 /// 2397 /// \returns true if an error occurred (i.e., the variable cannot be 2398 /// captured) and false if the capture succeeded. 2399 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, TryCaptureKind Kind, 2400 SourceLocation EllipsisLoc, bool BuildAndDiagnose, 2401 QualType &CaptureType, 2402 QualType &DeclRefType); 2403 2404 /// \brief Try to capture the given variable. 2405 bool tryCaptureVariable(VarDecl *Var, SourceLocation Loc, 2406 TryCaptureKind Kind = TryCapture_Implicit, 2407 SourceLocation EllipsisLoc = SourceLocation()); 2408 2409 /// \brief Given a variable, determine the type that a reference to that 2410 /// variable will have in the given scope. 2411 QualType getCapturedDeclRefType(VarDecl *Var, SourceLocation Loc); 2412 2413 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2414 void MarkDeclarationsReferencedInExpr(Expr *E, 2415 bool SkipLocalVariables = false); 2416 2417 /// \brief Try to recover by turning the given expression into a 2418 /// call. Returns true if recovery was attempted or an error was 2419 /// emitted; this may also leave the ExprResult invalid. 2420 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2421 bool ForceComplain = false, 2422 bool (*IsPlausibleResult)(QualType) = 0); 2423 2424 /// \brief Figure out if an expression could be turned into a call. 2425 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2426 UnresolvedSetImpl &NonTemplateOverloads); 2427 2428 /// \brief Conditionally issue a diagnostic based on the current 2429 /// evaluation context. 2430 /// 2431 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2432 /// the function body is parsed, and then do a basic reachability analysis to 2433 /// determine if the statement is reachable. If it is unreachable, the 2434 /// diagnostic will not be emitted. 2435 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2436 const PartialDiagnostic &PD); 2437 2438 // Primary Expressions. 2439 SourceRange getExprRange(Expr *E) const; 2440 2441 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, 2442 SourceLocation TemplateKWLoc, 2443 UnqualifiedId &Id, 2444 bool HasTrailingLParen, bool IsAddressOfOperand, 2445 CorrectionCandidateCallback *CCC = 0); 2446 2447 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2448 TemplateArgumentListInfo &Buffer, 2449 DeclarationNameInfo &NameInfo, 2450 const TemplateArgumentListInfo *&TemplateArgs); 2451 2452 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2453 CorrectionCandidateCallback &CCC, 2454 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2455 llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>()); 2456 2457 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2458 IdentifierInfo *II, 2459 bool AllowBuiltinCreation=false); 2460 2461 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2462 SourceLocation TemplateKWLoc, 2463 const DeclarationNameInfo &NameInfo, 2464 bool isAddressOfOperand, 2465 const TemplateArgumentListInfo *TemplateArgs); 2466 2467 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2468 ExprValueKind VK, 2469 SourceLocation Loc, 2470 const CXXScopeSpec *SS = 0); 2471 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2472 ExprValueKind VK, 2473 const DeclarationNameInfo &NameInfo, 2474 const CXXScopeSpec *SS = 0); 2475 ExprResult 2476 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2477 SourceLocation nameLoc, 2478 IndirectFieldDecl *indirectField, 2479 Expr *baseObjectExpr = 0, 2480 SourceLocation opLoc = SourceLocation()); 2481 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2482 SourceLocation TemplateKWLoc, 2483 LookupResult &R, 2484 const TemplateArgumentListInfo *TemplateArgs); 2485 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2486 SourceLocation TemplateKWLoc, 2487 LookupResult &R, 2488 const TemplateArgumentListInfo *TemplateArgs, 2489 bool IsDefiniteInstance); 2490 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2491 const LookupResult &R, 2492 bool HasTrailingLParen); 2493 2494 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2495 const DeclarationNameInfo &NameInfo); 2496 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2497 SourceLocation TemplateKWLoc, 2498 const DeclarationNameInfo &NameInfo, 2499 const TemplateArgumentListInfo *TemplateArgs); 2500 2501 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2502 LookupResult &R, 2503 bool NeedsADL); 2504 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2505 const DeclarationNameInfo &NameInfo, 2506 NamedDecl *D); 2507 2508 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2509 ExprResult ActOnNumericConstant(const Token &Tok); 2510 ExprResult ActOnCharacterConstant(const Token &Tok); 2511 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2512 ExprResult ActOnParenListExpr(SourceLocation L, 2513 SourceLocation R, 2514 MultiExprArg Val); 2515 2516 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2517 /// fragments (e.g. "foo" "bar" L"baz"). 2518 ExprResult ActOnStringLiteral(const Token *StringToks, 2519 unsigned NumStringToks); 2520 2521 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2522 SourceLocation DefaultLoc, 2523 SourceLocation RParenLoc, 2524 Expr *ControllingExpr, 2525 MultiTypeArg ArgTypes, 2526 MultiExprArg ArgExprs); 2527 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2528 SourceLocation DefaultLoc, 2529 SourceLocation RParenLoc, 2530 Expr *ControllingExpr, 2531 TypeSourceInfo **Types, 2532 Expr **Exprs, 2533 unsigned NumAssocs); 2534 2535 // Binary/Unary Operators. 'Tok' is the token for the operator. 2536 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2537 Expr *InputExpr); 2538 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2539 UnaryOperatorKind Opc, Expr *Input); 2540 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2541 tok::TokenKind Op, Expr *Input); 2542 2543 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2544 SourceLocation OpLoc, 2545 UnaryExprOrTypeTrait ExprKind, 2546 SourceRange R); 2547 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2548 UnaryExprOrTypeTrait ExprKind); 2549 ExprResult 2550 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2551 UnaryExprOrTypeTrait ExprKind, 2552 bool IsType, void *TyOrEx, 2553 const SourceRange &ArgRange); 2554 2555 ExprResult CheckPlaceholderExpr(Expr *E); 2556 bool CheckVecStepExpr(Expr *E); 2557 2558 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2559 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2560 SourceRange ExprRange, 2561 UnaryExprOrTypeTrait ExprKind); 2562 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2563 SourceLocation OpLoc, 2564 IdentifierInfo &Name, 2565 SourceLocation NameLoc, 2566 SourceLocation RParenLoc); 2567 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2568 tok::TokenKind Kind, Expr *Input); 2569 2570 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2571 Expr *Idx, SourceLocation RLoc); 2572 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2573 Expr *Idx, SourceLocation RLoc); 2574 2575 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2576 SourceLocation OpLoc, bool IsArrow, 2577 CXXScopeSpec &SS, 2578 SourceLocation TemplateKWLoc, 2579 NamedDecl *FirstQualifierInScope, 2580 const DeclarationNameInfo &NameInfo, 2581 const TemplateArgumentListInfo *TemplateArgs); 2582 2583 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2584 SourceLocation OpLoc, bool IsArrow, 2585 const CXXScopeSpec &SS, 2586 SourceLocation TemplateKWLoc, 2587 NamedDecl *FirstQualifierInScope, 2588 LookupResult &R, 2589 const TemplateArgumentListInfo *TemplateArgs, 2590 bool SuppressQualifierCheck = false); 2591 2592 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2593 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2594 bool &IsArrow, SourceLocation OpLoc, 2595 CXXScopeSpec &SS, 2596 Decl *ObjCImpDecl, 2597 bool HasTemplateArgs); 2598 2599 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2600 const CXXScopeSpec &SS, 2601 const LookupResult &R); 2602 2603 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2604 bool IsArrow, SourceLocation OpLoc, 2605 const CXXScopeSpec &SS, 2606 SourceLocation TemplateKWLoc, 2607 NamedDecl *FirstQualifierInScope, 2608 const DeclarationNameInfo &NameInfo, 2609 const TemplateArgumentListInfo *TemplateArgs); 2610 2611 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2612 SourceLocation OpLoc, 2613 tok::TokenKind OpKind, 2614 CXXScopeSpec &SS, 2615 SourceLocation TemplateKWLoc, 2616 UnqualifiedId &Member, 2617 Decl *ObjCImpDecl, 2618 bool HasTrailingLParen); 2619 2620 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2621 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2622 FunctionDecl *FDecl, 2623 const FunctionProtoType *Proto, 2624 Expr **Args, unsigned NumArgs, 2625 SourceLocation RParenLoc, 2626 bool ExecConfig = false); 2627 void CheckStaticArrayArgument(SourceLocation CallLoc, 2628 ParmVarDecl *Param, 2629 const Expr *ArgExpr); 2630 2631 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2632 /// This provides the location of the left/right parens and a list of comma 2633 /// locations. 2634 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2635 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2636 Expr *ExecConfig = 0, bool IsExecConfig = false); 2637 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2638 SourceLocation LParenLoc, 2639 Expr **Args, unsigned NumArgs, 2640 SourceLocation RParenLoc, 2641 Expr *Config = 0, 2642 bool IsExecConfig = false); 2643 2644 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2645 MultiExprArg ExecConfig, 2646 SourceLocation GGGLoc); 2647 2648 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2649 Declarator &D, ParsedType &Ty, 2650 SourceLocation RParenLoc, Expr *CastExpr); 2651 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2652 TypeSourceInfo *Ty, 2653 SourceLocation RParenLoc, 2654 Expr *Op); 2655 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2656 2657 /// \brief Build an altivec or OpenCL literal. 2658 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2659 SourceLocation RParenLoc, Expr *E, 2660 TypeSourceInfo *TInfo); 2661 2662 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2663 2664 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2665 ParsedType Ty, 2666 SourceLocation RParenLoc, 2667 Expr *InitExpr); 2668 2669 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2670 TypeSourceInfo *TInfo, 2671 SourceLocation RParenLoc, 2672 Expr *LiteralExpr); 2673 2674 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2675 MultiExprArg InitArgList, 2676 SourceLocation RBraceLoc); 2677 2678 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2679 SourceLocation Loc, 2680 bool GNUSyntax, 2681 ExprResult Init); 2682 2683 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2684 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2685 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2686 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2687 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2688 Expr *LHSExpr, Expr *RHSExpr); 2689 2690 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2691 /// in the case of a the GNU conditional expr extension. 2692 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2693 SourceLocation ColonLoc, 2694 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2695 2696 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2697 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2698 LabelDecl *TheDecl); 2699 2700 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2701 SourceLocation RPLoc); // "({..})" 2702 2703 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2704 struct OffsetOfComponent { 2705 SourceLocation LocStart, LocEnd; 2706 bool isBrackets; // true if [expr], false if .ident 2707 union { 2708 IdentifierInfo *IdentInfo; 2709 Expr *E; 2710 } U; 2711 }; 2712 2713 /// __builtin_offsetof(type, a.b[123][456].c) 2714 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2715 TypeSourceInfo *TInfo, 2716 OffsetOfComponent *CompPtr, 2717 unsigned NumComponents, 2718 SourceLocation RParenLoc); 2719 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2720 SourceLocation BuiltinLoc, 2721 SourceLocation TypeLoc, 2722 ParsedType ParsedArgTy, 2723 OffsetOfComponent *CompPtr, 2724 unsigned NumComponents, 2725 SourceLocation RParenLoc); 2726 2727 // __builtin_choose_expr(constExpr, expr1, expr2) 2728 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2729 Expr *CondExpr, Expr *LHSExpr, 2730 Expr *RHSExpr, SourceLocation RPLoc); 2731 2732 // __builtin_va_arg(expr, type) 2733 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2734 SourceLocation RPLoc); 2735 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2736 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2737 2738 // __null 2739 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2740 2741 bool CheckCaseExpression(Expr *E); 2742 2743 /// \brief Describes the result of an "if-exists" condition check. 2744 enum IfExistsResult { 2745 /// \brief The symbol exists. 2746 IER_Exists, 2747 2748 /// \brief The symbol does not exist. 2749 IER_DoesNotExist, 2750 2751 /// \brief The name is a dependent name, so the results will differ 2752 /// from one instantiation to the next. 2753 IER_Dependent, 2754 2755 /// \brief An error occurred. 2756 IER_Error 2757 }; 2758 2759 IfExistsResult 2760 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2761 const DeclarationNameInfo &TargetNameInfo); 2762 2763 IfExistsResult 2764 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2765 bool IsIfExists, CXXScopeSpec &SS, 2766 UnqualifiedId &Name); 2767 2768 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2769 bool IsIfExists, 2770 NestedNameSpecifierLoc QualifierLoc, 2771 DeclarationNameInfo NameInfo, 2772 Stmt *Nested); 2773 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2774 bool IsIfExists, 2775 CXXScopeSpec &SS, UnqualifiedId &Name, 2776 Stmt *Nested); 2777 2778 //===------------------------- "Block" Extension ------------------------===// 2779 2780 /// ActOnBlockStart - This callback is invoked when a block literal is 2781 /// started. 2782 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2783 2784 /// ActOnBlockArguments - This callback allows processing of block arguments. 2785 /// If there are no arguments, this is still invoked. 2786 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2787 2788 /// ActOnBlockError - If there is an error parsing a block, this callback 2789 /// is invoked to pop the information about the block from the action impl. 2790 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2791 2792 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2793 /// literal was successfully completed. ^(int x){...} 2794 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2795 Scope *CurScope); 2796 2797 //===---------------------------- OpenCL Features -----------------------===// 2798 2799 /// __builtin_astype(...) 2800 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2801 SourceLocation BuiltinLoc, 2802 SourceLocation RParenLoc); 2803 2804 //===---------------------------- C++ Features --------------------------===// 2805 2806 // Act on C++ namespaces 2807 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2808 SourceLocation NamespaceLoc, 2809 SourceLocation IdentLoc, 2810 IdentifierInfo *Ident, 2811 SourceLocation LBrace, 2812 AttributeList *AttrList); 2813 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2814 2815 NamespaceDecl *getStdNamespace() const; 2816 NamespaceDecl *getOrCreateStdNamespace(); 2817 2818 CXXRecordDecl *getStdBadAlloc() const; 2819 2820 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2821 /// it is and Element is not NULL, assigns the element type to Element. 2822 bool isStdInitializerList(QualType Ty, QualType *Element); 2823 2824 /// \brief Looks for the std::initializer_list template and instantiates it 2825 /// with Element, or emits an error if it's not found. 2826 /// 2827 /// \returns The instantiated template, or null on error. 2828 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2829 2830 /// \brief Determine whether Ctor is an initializer-list constructor, as 2831 /// defined in [dcl.init.list]p2. 2832 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2833 2834 Decl *ActOnUsingDirective(Scope *CurScope, 2835 SourceLocation UsingLoc, 2836 SourceLocation NamespcLoc, 2837 CXXScopeSpec &SS, 2838 SourceLocation IdentLoc, 2839 IdentifierInfo *NamespcName, 2840 AttributeList *AttrList); 2841 2842 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2843 2844 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2845 SourceLocation NamespaceLoc, 2846 SourceLocation AliasLoc, 2847 IdentifierInfo *Alias, 2848 CXXScopeSpec &SS, 2849 SourceLocation IdentLoc, 2850 IdentifierInfo *Ident); 2851 2852 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2853 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2854 const LookupResult &PreviousDecls); 2855 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2856 NamedDecl *Target); 2857 2858 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2859 bool isTypeName, 2860 const CXXScopeSpec &SS, 2861 SourceLocation NameLoc, 2862 const LookupResult &Previous); 2863 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2864 const CXXScopeSpec &SS, 2865 SourceLocation NameLoc); 2866 2867 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2868 SourceLocation UsingLoc, 2869 CXXScopeSpec &SS, 2870 const DeclarationNameInfo &NameInfo, 2871 AttributeList *AttrList, 2872 bool IsInstantiation, 2873 bool IsTypeName, 2874 SourceLocation TypenameLoc); 2875 2876 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2877 2878 Decl *ActOnUsingDeclaration(Scope *CurScope, 2879 AccessSpecifier AS, 2880 bool HasUsingKeyword, 2881 SourceLocation UsingLoc, 2882 CXXScopeSpec &SS, 2883 UnqualifiedId &Name, 2884 AttributeList *AttrList, 2885 bool IsTypeName, 2886 SourceLocation TypenameLoc); 2887 Decl *ActOnAliasDeclaration(Scope *CurScope, 2888 AccessSpecifier AS, 2889 MultiTemplateParamsArg TemplateParams, 2890 SourceLocation UsingLoc, 2891 UnqualifiedId &Name, 2892 TypeResult Type); 2893 2894 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2895 /// and sets it as the initializer for the the passed in VarDecl. 2896 bool InitializeVarWithConstructor(VarDecl *VD, 2897 CXXConstructorDecl *Constructor, 2898 MultiExprArg Exprs, 2899 bool HadMultipleCandidates); 2900 2901 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2902 /// including handling of its default argument expressions. 2903 /// 2904 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2905 ExprResult 2906 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2907 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2908 bool HadMultipleCandidates, bool RequiresZeroInit, 2909 unsigned ConstructKind, SourceRange ParenRange); 2910 2911 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2912 // the constructor can be elidable? 2913 ExprResult 2914 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2915 CXXConstructorDecl *Constructor, bool Elidable, 2916 MultiExprArg Exprs, bool HadMultipleCandidates, 2917 bool RequiresZeroInit, unsigned ConstructKind, 2918 SourceRange ParenRange); 2919 2920 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2921 /// the default expr if needed. 2922 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2923 FunctionDecl *FD, 2924 ParmVarDecl *Param); 2925 2926 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2927 /// constructed variable. 2928 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2929 2930 /// \brief Helper class that collects exception specifications for 2931 /// implicitly-declared special member functions. 2932 class ImplicitExceptionSpecification { 2933 // Pointer to allow copying 2934 ASTContext *Context; 2935 // We order exception specifications thus: 2936 // noexcept is the most restrictive, but is only used in C++0x. 2937 // throw() comes next. 2938 // Then a throw(collected exceptions) 2939 // Finally no specification. 2940 // throw(...) is used instead if any called function uses it. 2941 // 2942 // If this exception specification cannot be known yet (for instance, 2943 // because this is the exception specification for a defaulted default 2944 // constructor and we haven't finished parsing the deferred parts of the 2945 // class yet), the C++0x standard does not specify how to behave. We 2946 // record this as an 'unknown' exception specification, which overrules 2947 // any other specification (even 'none', to keep this rule simple). 2948 ExceptionSpecificationType ComputedEST; 2949 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2950 SmallVector<QualType, 4> Exceptions; 2951 2952 void ClearExceptions() { 2953 ExceptionsSeen.clear(); 2954 Exceptions.clear(); 2955 } 2956 2957 public: 2958 explicit ImplicitExceptionSpecification(ASTContext &Context) 2959 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2960 if (!Context.getLangOptions().CPlusPlus0x) 2961 ComputedEST = EST_DynamicNone; 2962 } 2963 2964 /// \brief Get the computed exception specification type. 2965 ExceptionSpecificationType getExceptionSpecType() const { 2966 assert(ComputedEST != EST_ComputedNoexcept && 2967 "noexcept(expr) should not be a possible result"); 2968 return ComputedEST; 2969 } 2970 2971 /// \brief The number of exceptions in the exception specification. 2972 unsigned size() const { return Exceptions.size(); } 2973 2974 /// \brief The set of exceptions in the exception specification. 2975 const QualType *data() const { return Exceptions.data(); } 2976 2977 /// \brief Integrate another called method into the collected data. 2978 void CalledDecl(CXXMethodDecl *Method); 2979 2980 /// \brief Integrate an invoked expression into the collected data. 2981 void CalledExpr(Expr *E); 2982 2983 /// \brief Specify that the exception specification can't be detemined yet. 2984 void SetDelayed() { 2985 ClearExceptions(); 2986 ComputedEST = EST_Delayed; 2987 } 2988 2989 FunctionProtoType::ExtProtoInfo getEPI() const { 2990 FunctionProtoType::ExtProtoInfo EPI; 2991 EPI.ExceptionSpecType = getExceptionSpecType(); 2992 EPI.NumExceptions = size(); 2993 EPI.Exceptions = data(); 2994 return EPI; 2995 } 2996 }; 2997 2998 /// \brief Determine what sort of exception specification a defaulted 2999 /// copy constructor of a class will have. 3000 ImplicitExceptionSpecification 3001 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3002 3003 /// \brief Determine what sort of exception specification a defaulted 3004 /// default constructor of a class will have, and whether the parameter 3005 /// will be const. 3006 std::pair<ImplicitExceptionSpecification, bool> 3007 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3008 3009 /// \brief Determine what sort of exception specification a defautled 3010 /// copy assignment operator of a class will have, and whether the 3011 /// parameter will be const. 3012 std::pair<ImplicitExceptionSpecification, bool> 3013 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 3014 3015 /// \brief Determine what sort of exception specification a defaulted move 3016 /// constructor of a class will have. 3017 ImplicitExceptionSpecification 3018 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 3019 3020 /// \brief Determine what sort of exception specification a defaulted move 3021 /// assignment operator of a class will have. 3022 ImplicitExceptionSpecification 3023 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 3024 3025 /// \brief Determine what sort of exception specification a defaulted 3026 /// destructor of a class will have. 3027 ImplicitExceptionSpecification 3028 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 3029 3030 /// \brief Determine if a special member function should have a deleted 3031 /// definition when it is defaulted. 3032 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 3033 3034 /// \brief Declare the implicit default constructor for the given class. 3035 /// 3036 /// \param ClassDecl The class declaration into which the implicit 3037 /// default constructor will be added. 3038 /// 3039 /// \returns The implicitly-declared default constructor. 3040 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 3041 CXXRecordDecl *ClassDecl); 3042 3043 /// DefineImplicitDefaultConstructor - Checks for feasibility of 3044 /// defining this constructor as the default constructor. 3045 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 3046 CXXConstructorDecl *Constructor); 3047 3048 /// \brief Declare the implicit destructor for the given class. 3049 /// 3050 /// \param ClassDecl The class declaration into which the implicit 3051 /// destructor will be added. 3052 /// 3053 /// \returns The implicitly-declared destructor. 3054 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 3055 3056 /// DefineImplicitDestructor - Checks for feasibility of 3057 /// defining this destructor as the default destructor. 3058 void DefineImplicitDestructor(SourceLocation CurrentLocation, 3059 CXXDestructorDecl *Destructor); 3060 3061 /// \brief Build an exception spec for destructors that don't have one. 3062 /// 3063 /// C++11 says that user-defined destructors with no exception spec get one 3064 /// that looks as if the destructor was implicitly declared. 3065 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3066 CXXDestructorDecl *Destructor); 3067 3068 /// \brief Declare all inherited constructors for the given class. 3069 /// 3070 /// \param ClassDecl The class declaration into which the inherited 3071 /// constructors will be added. 3072 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3073 3074 /// \brief Declare the implicit copy constructor for the given class. 3075 /// 3076 /// \param ClassDecl The class declaration into which the implicit 3077 /// copy constructor will be added. 3078 /// 3079 /// \returns The implicitly-declared copy constructor. 3080 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3081 3082 /// DefineImplicitCopyConstructor - Checks for feasibility of 3083 /// defining this constructor as the copy constructor. 3084 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3085 CXXConstructorDecl *Constructor); 3086 3087 /// \brief Declare the implicit move constructor for the given class. 3088 /// 3089 /// \param ClassDecl The Class declaration into which the implicit 3090 /// move constructor will be added. 3091 /// 3092 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3093 /// declared. 3094 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3095 3096 /// DefineImplicitMoveConstructor - Checks for feasibility of 3097 /// defining this constructor as the move constructor. 3098 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3099 CXXConstructorDecl *Constructor); 3100 3101 /// \brief Declare the implicit copy assignment operator for the given class. 3102 /// 3103 /// \param ClassDecl The class declaration into which the implicit 3104 /// copy assignment operator will be added. 3105 /// 3106 /// \returns The implicitly-declared copy assignment operator. 3107 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3108 3109 /// \brief Defines an implicitly-declared copy assignment operator. 3110 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3111 CXXMethodDecl *MethodDecl); 3112 3113 /// \brief Declare the implicit move assignment operator for the given class. 3114 /// 3115 /// \param ClassDecl The Class declaration into which the implicit 3116 /// move assignment operator will be added. 3117 /// 3118 /// \returns The implicitly-declared move assignment operator, or NULL if it 3119 /// wasn't declared. 3120 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3121 3122 /// \brief Defines an implicitly-declared move assignment operator. 3123 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3124 CXXMethodDecl *MethodDecl); 3125 3126 /// \brief Force the declaration of any implicitly-declared members of this 3127 /// class. 3128 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3129 3130 /// \brief Determine whether the given function is an implicitly-deleted 3131 /// special member function. 3132 bool isImplicitlyDeleted(FunctionDecl *FD); 3133 3134 /// MaybeBindToTemporary - If the passed in expression has a record type with 3135 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3136 /// it simply returns the passed in expression. 3137 ExprResult MaybeBindToTemporary(Expr *E); 3138 3139 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3140 MultiExprArg ArgsPtr, 3141 SourceLocation Loc, 3142 ASTOwningVector<Expr*> &ConvertedArgs, 3143 bool AllowExplicit = false); 3144 3145 ParsedType getDestructorName(SourceLocation TildeLoc, 3146 IdentifierInfo &II, SourceLocation NameLoc, 3147 Scope *S, CXXScopeSpec &SS, 3148 ParsedType ObjectType, 3149 bool EnteringContext); 3150 3151 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3152 3153 // Checks that reinterpret casts don't have undefined behavior. 3154 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3155 bool IsDereference, SourceRange Range); 3156 3157 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3158 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3159 tok::TokenKind Kind, 3160 SourceLocation LAngleBracketLoc, 3161 Declarator &D, 3162 SourceLocation RAngleBracketLoc, 3163 SourceLocation LParenLoc, 3164 Expr *E, 3165 SourceLocation RParenLoc); 3166 3167 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3168 tok::TokenKind Kind, 3169 TypeSourceInfo *Ty, 3170 Expr *E, 3171 SourceRange AngleBrackets, 3172 SourceRange Parens); 3173 3174 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3175 SourceLocation TypeidLoc, 3176 TypeSourceInfo *Operand, 3177 SourceLocation RParenLoc); 3178 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3179 SourceLocation TypeidLoc, 3180 Expr *Operand, 3181 SourceLocation RParenLoc); 3182 3183 /// ActOnCXXTypeid - Parse typeid( something ). 3184 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3185 SourceLocation LParenLoc, bool isType, 3186 void *TyOrExpr, 3187 SourceLocation RParenLoc); 3188 3189 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3190 SourceLocation TypeidLoc, 3191 TypeSourceInfo *Operand, 3192 SourceLocation RParenLoc); 3193 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3194 SourceLocation TypeidLoc, 3195 Expr *Operand, 3196 SourceLocation RParenLoc); 3197 3198 /// ActOnCXXUuidof - Parse __uuidof( something ). 3199 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3200 SourceLocation LParenLoc, bool isType, 3201 void *TyOrExpr, 3202 SourceLocation RParenLoc); 3203 3204 3205 //// ActOnCXXThis - Parse 'this' pointer. 3206 ExprResult ActOnCXXThis(SourceLocation loc); 3207 3208 /// \brief Try to retrieve the type of the 'this' pointer. 3209 /// 3210 /// \param Capture If true, capture 'this' in this context. 3211 /// 3212 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3213 QualType getCurrentThisType(); 3214 3215 /// \brief Make sure the value of 'this' is actually available in the current 3216 /// context, if it is a potentially evaluated context. 3217 /// 3218 /// \param Loc The location at which the capture of 'this' occurs. 3219 /// 3220 /// \param Explicit Whether 'this' is explicitly captured in a lambda 3221 /// capture list. 3222 void CheckCXXThisCapture(SourceLocation Loc, bool Explicit = false); 3223 3224 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3225 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3226 3227 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3228 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3229 3230 //// ActOnCXXThrow - Parse throw expressions. 3231 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3232 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3233 bool IsThrownVarInScope); 3234 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3235 bool IsThrownVarInScope); 3236 3237 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3238 /// Can be interpreted either as function-style casting ("int(x)") 3239 /// or class type construction ("ClassType(x,y,z)") 3240 /// or creation of a value-initialized type ("int()"). 3241 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3242 SourceLocation LParenLoc, 3243 MultiExprArg Exprs, 3244 SourceLocation RParenLoc); 3245 3246 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3247 SourceLocation LParenLoc, 3248 MultiExprArg Exprs, 3249 SourceLocation RParenLoc); 3250 3251 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3252 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3253 SourceLocation PlacementLParen, 3254 MultiExprArg PlacementArgs, 3255 SourceLocation PlacementRParen, 3256 SourceRange TypeIdParens, Declarator &D, 3257 Expr *Initializer); 3258 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3259 SourceLocation PlacementLParen, 3260 MultiExprArg PlacementArgs, 3261 SourceLocation PlacementRParen, 3262 SourceRange TypeIdParens, 3263 QualType AllocType, 3264 TypeSourceInfo *AllocTypeInfo, 3265 Expr *ArraySize, 3266 SourceRange DirectInitRange, 3267 Expr *Initializer, 3268 bool TypeMayContainAuto = true); 3269 3270 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3271 SourceRange R); 3272 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3273 bool UseGlobal, QualType AllocType, bool IsArray, 3274 Expr **PlaceArgs, unsigned NumPlaceArgs, 3275 FunctionDecl *&OperatorNew, 3276 FunctionDecl *&OperatorDelete); 3277 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3278 DeclarationName Name, Expr** Args, 3279 unsigned NumArgs, DeclContext *Ctx, 3280 bool AllowMissing, FunctionDecl *&Operator, 3281 bool Diagnose = true); 3282 void DeclareGlobalNewDelete(); 3283 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3284 QualType Argument, 3285 bool addMallocAttr = false); 3286 3287 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3288 DeclarationName Name, FunctionDecl* &Operator, 3289 bool Diagnose = true); 3290 3291 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3292 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3293 bool UseGlobal, bool ArrayForm, 3294 Expr *Operand); 3295 3296 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3297 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3298 SourceLocation StmtLoc, 3299 bool ConvertToBoolean); 3300 3301 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3302 Expr *Operand, SourceLocation RParen); 3303 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3304 SourceLocation RParen); 3305 3306 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3307 /// pseudo-functions. 3308 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3309 SourceLocation KWLoc, 3310 ParsedType Ty, 3311 SourceLocation RParen); 3312 3313 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3314 SourceLocation KWLoc, 3315 TypeSourceInfo *T, 3316 SourceLocation RParen); 3317 3318 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3319 /// pseudo-functions. 3320 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3321 SourceLocation KWLoc, 3322 ParsedType LhsTy, 3323 ParsedType RhsTy, 3324 SourceLocation RParen); 3325 3326 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3327 SourceLocation KWLoc, 3328 TypeSourceInfo *LhsT, 3329 TypeSourceInfo *RhsT, 3330 SourceLocation RParen); 3331 3332 /// \brief Parsed one of the type trait support pseudo-functions. 3333 ExprResult ActOnTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3334 ArrayRef<ParsedType> Args, 3335 SourceLocation RParenLoc); 3336 ExprResult BuildTypeTrait(TypeTrait Kind, SourceLocation KWLoc, 3337 ArrayRef<TypeSourceInfo *> Args, 3338 SourceLocation RParenLoc); 3339 3340 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3341 /// pseudo-functions. 3342 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3343 SourceLocation KWLoc, 3344 ParsedType LhsTy, 3345 Expr *DimExpr, 3346 SourceLocation RParen); 3347 3348 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3349 SourceLocation KWLoc, 3350 TypeSourceInfo *TSInfo, 3351 Expr *DimExpr, 3352 SourceLocation RParen); 3353 3354 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3355 /// pseudo-functions. 3356 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3357 SourceLocation KWLoc, 3358 Expr *Queried, 3359 SourceLocation RParen); 3360 3361 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3362 SourceLocation KWLoc, 3363 Expr *Queried, 3364 SourceLocation RParen); 3365 3366 ExprResult ActOnStartCXXMemberReference(Scope *S, 3367 Expr *Base, 3368 SourceLocation OpLoc, 3369 tok::TokenKind OpKind, 3370 ParsedType &ObjectType, 3371 bool &MayBePseudoDestructor); 3372 3373 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3374 3375 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3376 SourceLocation OpLoc, 3377 tok::TokenKind OpKind, 3378 const CXXScopeSpec &SS, 3379 TypeSourceInfo *ScopeType, 3380 SourceLocation CCLoc, 3381 SourceLocation TildeLoc, 3382 PseudoDestructorTypeStorage DestroyedType, 3383 bool HasTrailingLParen); 3384 3385 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3386 SourceLocation OpLoc, 3387 tok::TokenKind OpKind, 3388 CXXScopeSpec &SS, 3389 UnqualifiedId &FirstTypeName, 3390 SourceLocation CCLoc, 3391 SourceLocation TildeLoc, 3392 UnqualifiedId &SecondTypeName, 3393 bool HasTrailingLParen); 3394 3395 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3396 SourceLocation OpLoc, 3397 tok::TokenKind OpKind, 3398 SourceLocation TildeLoc, 3399 const DeclSpec& DS, 3400 bool HasTrailingLParen); 3401 3402 /// MaybeCreateExprWithCleanups - If the current full-expression 3403 /// requires any cleanups, surround it with a ExprWithCleanups node. 3404 /// Otherwise, just returns the passed-in expression. 3405 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3406 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3407 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3408 3409 ExprResult ActOnFinishFullExpr(Expr *Expr); 3410 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3411 3412 // Marks SS invalid if it represents an incomplete type. 3413 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3414 3415 DeclContext *computeDeclContext(QualType T); 3416 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3417 bool EnteringContext = false); 3418 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3419 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3420 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3421 3422 /// \brief The parser has parsed a global nested-name-specifier '::'. 3423 /// 3424 /// \param S The scope in which this nested-name-specifier occurs. 3425 /// 3426 /// \param CCLoc The location of the '::'. 3427 /// 3428 /// \param SS The nested-name-specifier, which will be updated in-place 3429 /// to reflect the parsed nested-name-specifier. 3430 /// 3431 /// \returns true if an error occurred, false otherwise. 3432 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3433 CXXScopeSpec &SS); 3434 3435 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3436 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3437 3438 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3439 SourceLocation IdLoc, 3440 IdentifierInfo &II, 3441 ParsedType ObjectType); 3442 3443 bool BuildCXXNestedNameSpecifier(Scope *S, 3444 IdentifierInfo &Identifier, 3445 SourceLocation IdentifierLoc, 3446 SourceLocation CCLoc, 3447 QualType ObjectType, 3448 bool EnteringContext, 3449 CXXScopeSpec &SS, 3450 NamedDecl *ScopeLookupResult, 3451 bool ErrorRecoveryLookup); 3452 3453 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3454 /// 3455 /// \param S The scope in which this nested-name-specifier occurs. 3456 /// 3457 /// \param Identifier The identifier preceding the '::'. 3458 /// 3459 /// \param IdentifierLoc The location of the identifier. 3460 /// 3461 /// \param CCLoc The location of the '::'. 3462 /// 3463 /// \param ObjectType The type of the object, if we're parsing 3464 /// nested-name-specifier in a member access expression. 3465 /// 3466 /// \param EnteringContext Whether we're entering the context nominated by 3467 /// this nested-name-specifier. 3468 /// 3469 /// \param SS The nested-name-specifier, which is both an input 3470 /// parameter (the nested-name-specifier before this type) and an 3471 /// output parameter (containing the full nested-name-specifier, 3472 /// including this new type). 3473 /// 3474 /// \returns true if an error occurred, false otherwise. 3475 bool ActOnCXXNestedNameSpecifier(Scope *S, 3476 IdentifierInfo &Identifier, 3477 SourceLocation IdentifierLoc, 3478 SourceLocation CCLoc, 3479 ParsedType ObjectType, 3480 bool EnteringContext, 3481 CXXScopeSpec &SS); 3482 3483 ExprResult ActOnDecltypeExpression(Expr *E); 3484 3485 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3486 const DeclSpec &DS, 3487 SourceLocation ColonColonLoc); 3488 3489 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3490 IdentifierInfo &Identifier, 3491 SourceLocation IdentifierLoc, 3492 SourceLocation ColonLoc, 3493 ParsedType ObjectType, 3494 bool EnteringContext); 3495 3496 /// \brief The parser has parsed a nested-name-specifier 3497 /// 'template[opt] template-name < template-args >::'. 3498 /// 3499 /// \param S The scope in which this nested-name-specifier occurs. 3500 /// 3501 /// \param SS The nested-name-specifier, which is both an input 3502 /// parameter (the nested-name-specifier before this type) and an 3503 /// output parameter (containing the full nested-name-specifier, 3504 /// including this new type). 3505 /// 3506 /// \param TemplateKWLoc the location of the 'template' keyword, if any. 3507 /// \param TemplateName The template name. 3508 /// \param TemplateNameLoc The location of the template name. 3509 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3510 /// \param TemplateArgs The template arguments. 3511 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3512 /// \param CCLoc The location of the '::'. 3513 /// 3514 /// \param EnteringContext Whether we're entering the context of the 3515 /// nested-name-specifier. 3516 /// 3517 /// 3518 /// \returns true if an error occurred, false otherwise. 3519 bool ActOnCXXNestedNameSpecifier(Scope *S, 3520 CXXScopeSpec &SS, 3521 SourceLocation TemplateKWLoc, 3522 TemplateTy Template, 3523 SourceLocation TemplateNameLoc, 3524 SourceLocation LAngleLoc, 3525 ASTTemplateArgsPtr TemplateArgs, 3526 SourceLocation RAngleLoc, 3527 SourceLocation CCLoc, 3528 bool EnteringContext); 3529 3530 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3531 /// that the parser can use later to reconstruct the given 3532 /// nested-name-specifier. 3533 /// 3534 /// \param SS A nested-name-specifier. 3535 /// 3536 /// \returns A pointer containing all of the information in the 3537 /// nested-name-specifier \p SS. 3538 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3539 3540 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3541 /// the nested-name-specifier structure. 3542 /// 3543 /// \param Annotation The annotation pointer, produced by 3544 /// \c SaveNestedNameSpecifierAnnotation(). 3545 /// 3546 /// \param AnnotationRange The source range corresponding to the annotation. 3547 /// 3548 /// \param SS The nested-name-specifier that will be updated with the contents 3549 /// of the annotation pointer. 3550 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3551 SourceRange AnnotationRange, 3552 CXXScopeSpec &SS); 3553 3554 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3555 3556 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3557 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3558 /// After this method is called, according to [C++ 3.4.3p3], names should be 3559 /// looked up in the declarator-id's scope, until the declarator is parsed and 3560 /// ActOnCXXExitDeclaratorScope is called. 3561 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3562 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3563 3564 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3565 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3566 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3567 /// Used to indicate that names should revert to being looked up in the 3568 /// defining scope. 3569 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3570 3571 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3572 /// initializer for the declaration 'Dcl'. 3573 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3574 /// static data member of class X, names should be looked up in the scope of 3575 /// class X. 3576 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3577 3578 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3579 /// initializer for the declaration 'Dcl'. 3580 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3581 3582 /// \brief Create a new lambda closure type. 3583 CXXRecordDecl *createLambdaClosureType(SourceRange IntroducerRange, 3584 bool KnownDependent = false); 3585 3586 /// \brief Start the definition of a lambda expression. 3587 CXXMethodDecl *startLambdaDefinition(CXXRecordDecl *Class, 3588 SourceRange IntroducerRange, 3589 TypeSourceInfo *MethodType, 3590 SourceLocation EndLoc, 3591 llvm::ArrayRef<ParmVarDecl *> Params); 3592 3593 /// \brief Introduce the scope for a lambda expression. 3594 sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator, 3595 SourceRange IntroducerRange, 3596 LambdaCaptureDefault CaptureDefault, 3597 bool ExplicitParams, 3598 bool ExplicitResultType, 3599 bool Mutable); 3600 3601 /// \brief Note that we have finished the explicit captures for the 3602 /// given lambda. 3603 void finishLambdaExplicitCaptures(sema::LambdaScopeInfo *LSI); 3604 3605 /// \brief Introduce the lambda parameters into scope. 3606 void addLambdaParameters(CXXMethodDecl *CallOperator, Scope *CurScope); 3607 3608 /// ActOnStartOfLambdaDefinition - This is called just before we start 3609 /// parsing the body of a lambda; it analyzes the explicit captures and 3610 /// arguments, and sets up various data-structures for the body of the 3611 /// lambda. 3612 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3613 Declarator &ParamInfo, Scope *CurScope); 3614 3615 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3616 /// is invoked to pop the information about the lambda. 3617 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope, 3618 bool IsInstantiation = false); 3619 3620 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3621 /// was successfully completed. 3622 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3623 Scope *CurScope, 3624 llvm::Optional<unsigned> ManglingNumber 3625 = llvm::Optional<unsigned>(), 3626 Decl *ContextDecl = 0, 3627 bool IsInstantiation = false); 3628 3629 /// \brief Define the "body" of the conversion from a lambda object to a 3630 /// function pointer. 3631 /// 3632 /// This routine doesn't actually define a sensible body; rather, it fills 3633 /// in the initialization expression needed to copy the lambda object into 3634 /// the block, and IR generation actually generates the real body of the 3635 /// block pointer conversion. 3636 void DefineImplicitLambdaToFunctionPointerConversion( 3637 SourceLocation CurrentLoc, CXXConversionDecl *Conv); 3638 3639 /// \brief Define the "body" of the conversion from a lambda object to a 3640 /// block pointer. 3641 /// 3642 /// This routine doesn't actually define a sensible body; rather, it fills 3643 /// in the initialization expression needed to copy the lambda object into 3644 /// the block, and IR generation actually generates the real body of the 3645 /// block pointer conversion. 3646 void DefineImplicitLambdaToBlockPointerConversion(SourceLocation CurrentLoc, 3647 CXXConversionDecl *Conv); 3648 3649 // ParseObjCStringLiteral - Parse Objective-C string literals. 3650 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3651 Expr **Strings, 3652 unsigned NumStrings); 3653 3654 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3655 TypeSourceInfo *EncodedTypeInfo, 3656 SourceLocation RParenLoc); 3657 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3658 CXXMethodDecl *Method, 3659 bool HadMultipleCandidates); 3660 3661 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3662 SourceLocation EncodeLoc, 3663 SourceLocation LParenLoc, 3664 ParsedType Ty, 3665 SourceLocation RParenLoc); 3666 3667 // ParseObjCSelectorExpression - Build selector expression for @selector 3668 ExprResult ParseObjCSelectorExpression(Selector Sel, 3669 SourceLocation AtLoc, 3670 SourceLocation SelLoc, 3671 SourceLocation LParenLoc, 3672 SourceLocation RParenLoc); 3673 3674 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3675 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3676 SourceLocation AtLoc, 3677 SourceLocation ProtoLoc, 3678 SourceLocation LParenLoc, 3679 SourceLocation RParenLoc); 3680 3681 //===--------------------------------------------------------------------===// 3682 // C++ Declarations 3683 // 3684 Decl *ActOnStartLinkageSpecification(Scope *S, 3685 SourceLocation ExternLoc, 3686 SourceLocation LangLoc, 3687 StringRef Lang, 3688 SourceLocation LBraceLoc); 3689 Decl *ActOnFinishLinkageSpecification(Scope *S, 3690 Decl *LinkageSpec, 3691 SourceLocation RBraceLoc); 3692 3693 3694 //===--------------------------------------------------------------------===// 3695 // C++ Classes 3696 // 3697 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3698 const CXXScopeSpec *SS = 0); 3699 3700 bool ActOnAccessSpecifier(AccessSpecifier Access, 3701 SourceLocation ASLoc, 3702 SourceLocation ColonLoc, 3703 AttributeList *Attrs = 0); 3704 3705 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3706 Declarator &D, 3707 MultiTemplateParamsArg TemplateParameterLists, 3708 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3709 bool HasDeferredInit); 3710 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3711 Expr *Init); 3712 3713 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3714 Scope *S, 3715 CXXScopeSpec &SS, 3716 IdentifierInfo *MemberOrBase, 3717 ParsedType TemplateTypeTy, 3718 const DeclSpec &DS, 3719 SourceLocation IdLoc, 3720 SourceLocation LParenLoc, 3721 Expr **Args, unsigned NumArgs, 3722 SourceLocation RParenLoc, 3723 SourceLocation EllipsisLoc); 3724 3725 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3726 Scope *S, 3727 CXXScopeSpec &SS, 3728 IdentifierInfo *MemberOrBase, 3729 ParsedType TemplateTypeTy, 3730 const DeclSpec &DS, 3731 SourceLocation IdLoc, 3732 Expr *InitList, 3733 SourceLocation EllipsisLoc); 3734 3735 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3736 Scope *S, 3737 CXXScopeSpec &SS, 3738 IdentifierInfo *MemberOrBase, 3739 ParsedType TemplateTypeTy, 3740 const DeclSpec &DS, 3741 SourceLocation IdLoc, 3742 Expr *Init, 3743 SourceLocation EllipsisLoc); 3744 3745 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3746 Expr *Init, 3747 SourceLocation IdLoc); 3748 3749 MemInitResult BuildBaseInitializer(QualType BaseType, 3750 TypeSourceInfo *BaseTInfo, 3751 Expr *Init, 3752 CXXRecordDecl *ClassDecl, 3753 SourceLocation EllipsisLoc); 3754 3755 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3756 Expr *Init, 3757 CXXRecordDecl *ClassDecl); 3758 3759 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3760 CXXCtorInitializer *Initializer); 3761 3762 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3763 CXXCtorInitializer **Initializers, 3764 unsigned NumInitializers, bool AnyErrors); 3765 3766 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3767 3768 3769 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3770 /// mark all the non-trivial destructors of its members and bases as 3771 /// referenced. 3772 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3773 CXXRecordDecl *Record); 3774 3775 /// \brief The list of classes whose vtables have been used within 3776 /// this translation unit, and the source locations at which the 3777 /// first use occurred. 3778 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3779 3780 /// \brief The list of vtables that are required but have not yet been 3781 /// materialized. 3782 SmallVector<VTableUse, 16> VTableUses; 3783 3784 /// \brief The set of classes whose vtables have been used within 3785 /// this translation unit, and a bit that will be true if the vtable is 3786 /// required to be emitted (otherwise, it should be emitted only if needed 3787 /// by code generation). 3788 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3789 3790 /// \brief Load any externally-stored vtable uses. 3791 void LoadExternalVTableUses(); 3792 3793 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3794 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3795 DynamicClassesType; 3796 3797 /// \brief A list of all of the dynamic classes in this translation 3798 /// unit. 3799 DynamicClassesType DynamicClasses; 3800 3801 /// \brief Note that the vtable for the given class was used at the 3802 /// given location. 3803 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3804 bool DefinitionRequired = false); 3805 3806 /// MarkVirtualMembersReferenced - Will mark all members of the given 3807 /// CXXRecordDecl referenced. 3808 void MarkVirtualMembersReferenced(SourceLocation Loc, 3809 const CXXRecordDecl *RD); 3810 3811 /// \brief Define all of the vtables that have been used in this 3812 /// translation unit and reference any virtual members used by those 3813 /// vtables. 3814 /// 3815 /// \returns true if any work was done, false otherwise. 3816 bool DefineUsedVTables(); 3817 3818 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3819 3820 void ActOnMemInitializers(Decl *ConstructorDecl, 3821 SourceLocation ColonLoc, 3822 CXXCtorInitializer **MemInits, 3823 unsigned NumMemInits, 3824 bool AnyErrors); 3825 3826 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3827 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3828 Decl *TagDecl, 3829 SourceLocation LBrac, 3830 SourceLocation RBrac, 3831 AttributeList *AttrList); 3832 3833 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3834 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3835 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3836 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3837 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3838 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3839 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3840 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3841 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3842 bool IsInsideALocalClassWithinATemplateFunction(); 3843 3844 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3845 Expr *AssertExpr, 3846 Expr *AssertMessageExpr, 3847 SourceLocation RParenLoc); 3848 3849 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3850 SourceLocation FriendLoc, 3851 TypeSourceInfo *TSInfo); 3852 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3853 MultiTemplateParamsArg TemplateParams); 3854 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3855 MultiTemplateParamsArg TemplateParams); 3856 3857 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3858 StorageClass& SC); 3859 void CheckConstructor(CXXConstructorDecl *Constructor); 3860 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3861 StorageClass& SC); 3862 bool CheckDestructor(CXXDestructorDecl *Destructor); 3863 void CheckConversionDeclarator(Declarator &D, QualType &R, 3864 StorageClass& SC); 3865 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3866 3867 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3868 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3869 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3870 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3871 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3872 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3873 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3874 3875 //===--------------------------------------------------------------------===// 3876 // C++ Derived Classes 3877 // 3878 3879 /// ActOnBaseSpecifier - Parsed a base specifier 3880 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3881 SourceRange SpecifierRange, 3882 bool Virtual, AccessSpecifier Access, 3883 TypeSourceInfo *TInfo, 3884 SourceLocation EllipsisLoc); 3885 3886 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3887 SourceRange SpecifierRange, 3888 bool Virtual, AccessSpecifier Access, 3889 ParsedType basetype, 3890 SourceLocation BaseLoc, 3891 SourceLocation EllipsisLoc); 3892 3893 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3894 unsigned NumBases); 3895 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3896 unsigned NumBases); 3897 3898 bool IsDerivedFrom(QualType Derived, QualType Base); 3899 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3900 3901 // FIXME: I don't like this name. 3902 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3903 3904 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3905 3906 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3907 SourceLocation Loc, SourceRange Range, 3908 CXXCastPath *BasePath = 0, 3909 bool IgnoreAccess = false); 3910 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3911 unsigned InaccessibleBaseID, 3912 unsigned AmbigiousBaseConvID, 3913 SourceLocation Loc, SourceRange Range, 3914 DeclarationName Name, 3915 CXXCastPath *BasePath); 3916 3917 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3918 3919 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3920 /// covariant, according to C++ [class.virtual]p5. 3921 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3922 const CXXMethodDecl *Old); 3923 3924 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3925 /// spec is a subset of base spec. 3926 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3927 const CXXMethodDecl *Old); 3928 3929 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3930 3931 /// CheckOverrideControl - Check C++0x override control semantics. 3932 void CheckOverrideControl(const Decl *D); 3933 3934 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3935 /// overrides a virtual member function marked 'final', according to 3936 /// C++0x [class.virtual]p3. 3937 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3938 const CXXMethodDecl *Old); 3939 3940 3941 //===--------------------------------------------------------------------===// 3942 // C++ Access Control 3943 // 3944 3945 enum AccessResult { 3946 AR_accessible, 3947 AR_inaccessible, 3948 AR_dependent, 3949 AR_delayed 3950 }; 3951 3952 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3953 NamedDecl *PrevMemberDecl, 3954 AccessSpecifier LexicalAS); 3955 3956 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3957 DeclAccessPair FoundDecl); 3958 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3959 DeclAccessPair FoundDecl); 3960 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3961 SourceRange PlacementRange, 3962 CXXRecordDecl *NamingClass, 3963 DeclAccessPair FoundDecl, 3964 bool Diagnose = true); 3965 AccessResult CheckConstructorAccess(SourceLocation Loc, 3966 CXXConstructorDecl *D, 3967 const InitializedEntity &Entity, 3968 AccessSpecifier Access, 3969 bool IsCopyBindingRefToTemp = false); 3970 AccessResult CheckConstructorAccess(SourceLocation Loc, 3971 CXXConstructorDecl *D, 3972 AccessSpecifier Access, 3973 PartialDiagnostic PD); 3974 AccessResult CheckDestructorAccess(SourceLocation Loc, 3975 CXXDestructorDecl *Dtor, 3976 const PartialDiagnostic &PDiag); 3977 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3978 NamedDecl *D, 3979 const PartialDiagnostic &PDiag); 3980 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3981 Expr *ObjectExpr, 3982 Expr *ArgExpr, 3983 DeclAccessPair FoundDecl); 3984 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3985 DeclAccessPair FoundDecl); 3986 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3987 QualType Base, QualType Derived, 3988 const CXXBasePath &Path, 3989 unsigned DiagID, 3990 bool ForceCheck = false, 3991 bool ForceUnprivileged = false); 3992 void CheckLookupAccess(const LookupResult &R); 3993 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3994 3995 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3996 const MultiLevelTemplateArgumentList &TemplateArgs); 3997 void PerformDependentDiagnostics(const DeclContext *Pattern, 3998 const MultiLevelTemplateArgumentList &TemplateArgs); 3999 4000 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 4001 4002 /// A flag to suppress access checking. 4003 bool SuppressAccessChecking; 4004 4005 /// \brief When true, access checking violations are treated as SFINAE 4006 /// failures rather than hard errors. 4007 bool AccessCheckingSFINAE; 4008 4009 void ActOnStartSuppressingAccessChecks(); 4010 void ActOnStopSuppressingAccessChecks(); 4011 4012 enum AbstractDiagSelID { 4013 AbstractNone = -1, 4014 AbstractReturnType, 4015 AbstractParamType, 4016 AbstractVariableType, 4017 AbstractFieldType, 4018 AbstractArrayType 4019 }; 4020 4021 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 4022 const PartialDiagnostic &PD); 4023 void DiagnoseAbstractType(const CXXRecordDecl *RD); 4024 4025 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 4026 AbstractDiagSelID SelID = AbstractNone); 4027 4028 //===--------------------------------------------------------------------===// 4029 // C++ Overloaded Operators [C++ 13.5] 4030 // 4031 4032 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 4033 4034 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 4035 4036 //===--------------------------------------------------------------------===// 4037 // C++ Templates [C++ 14] 4038 // 4039 void FilterAcceptableTemplateNames(LookupResult &R); 4040 bool hasAnyAcceptableTemplateNames(LookupResult &R); 4041 4042 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 4043 QualType ObjectType, bool EnteringContext, 4044 bool &MemberOfUnknownSpecialization); 4045 4046 TemplateNameKind isTemplateName(Scope *S, 4047 CXXScopeSpec &SS, 4048 bool hasTemplateKeyword, 4049 UnqualifiedId &Name, 4050 ParsedType ObjectType, 4051 bool EnteringContext, 4052 TemplateTy &Template, 4053 bool &MemberOfUnknownSpecialization); 4054 4055 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 4056 SourceLocation IILoc, 4057 Scope *S, 4058 const CXXScopeSpec *SS, 4059 TemplateTy &SuggestedTemplate, 4060 TemplateNameKind &SuggestedKind); 4061 4062 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 4063 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 4064 4065 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 4066 SourceLocation EllipsisLoc, 4067 SourceLocation KeyLoc, 4068 IdentifierInfo *ParamName, 4069 SourceLocation ParamNameLoc, 4070 unsigned Depth, unsigned Position, 4071 SourceLocation EqualLoc, 4072 ParsedType DefaultArg); 4073 4074 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 4075 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 4076 unsigned Depth, 4077 unsigned Position, 4078 SourceLocation EqualLoc, 4079 Expr *DefaultArg); 4080 Decl *ActOnTemplateTemplateParameter(Scope *S, 4081 SourceLocation TmpLoc, 4082 TemplateParameterList *Params, 4083 SourceLocation EllipsisLoc, 4084 IdentifierInfo *ParamName, 4085 SourceLocation ParamNameLoc, 4086 unsigned Depth, 4087 unsigned Position, 4088 SourceLocation EqualLoc, 4089 ParsedTemplateArgument DefaultArg); 4090 4091 TemplateParameterList * 4092 ActOnTemplateParameterList(unsigned Depth, 4093 SourceLocation ExportLoc, 4094 SourceLocation TemplateLoc, 4095 SourceLocation LAngleLoc, 4096 Decl **Params, unsigned NumParams, 4097 SourceLocation RAngleLoc); 4098 4099 /// \brief The context in which we are checking a template parameter 4100 /// list. 4101 enum TemplateParamListContext { 4102 TPC_ClassTemplate, 4103 TPC_FunctionTemplate, 4104 TPC_ClassTemplateMember, 4105 TPC_FriendFunctionTemplate, 4106 TPC_FriendFunctionTemplateDefinition, 4107 TPC_TypeAliasTemplate 4108 }; 4109 4110 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 4111 TemplateParameterList *OldParams, 4112 TemplateParamListContext TPC); 4113 TemplateParameterList * 4114 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 4115 SourceLocation DeclLoc, 4116 const CXXScopeSpec &SS, 4117 TemplateParameterList **ParamLists, 4118 unsigned NumParamLists, 4119 bool IsFriend, 4120 bool &IsExplicitSpecialization, 4121 bool &Invalid); 4122 4123 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 4124 SourceLocation KWLoc, CXXScopeSpec &SS, 4125 IdentifierInfo *Name, SourceLocation NameLoc, 4126 AttributeList *Attr, 4127 TemplateParameterList *TemplateParams, 4128 AccessSpecifier AS, 4129 SourceLocation ModulePrivateLoc, 4130 unsigned NumOuterTemplateParamLists, 4131 TemplateParameterList **OuterTemplateParamLists); 4132 4133 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4134 TemplateArgumentListInfo &Out); 4135 4136 void NoteAllFoundTemplates(TemplateName Name); 4137 4138 QualType CheckTemplateIdType(TemplateName Template, 4139 SourceLocation TemplateLoc, 4140 TemplateArgumentListInfo &TemplateArgs); 4141 4142 TypeResult 4143 ActOnTemplateIdType(CXXScopeSpec &SS, SourceLocation TemplateKWLoc, 4144 TemplateTy Template, SourceLocation TemplateLoc, 4145 SourceLocation LAngleLoc, 4146 ASTTemplateArgsPtr TemplateArgs, 4147 SourceLocation RAngleLoc, 4148 bool IsCtorOrDtorName = false); 4149 4150 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4151 /// such as \c class T::template apply<U>. 4152 /// 4153 /// \param TUK 4154 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4155 TypeSpecifierType TagSpec, 4156 SourceLocation TagLoc, 4157 CXXScopeSpec &SS, 4158 SourceLocation TemplateKWLoc, 4159 TemplateTy TemplateD, 4160 SourceLocation TemplateLoc, 4161 SourceLocation LAngleLoc, 4162 ASTTemplateArgsPtr TemplateArgsIn, 4163 SourceLocation RAngleLoc); 4164 4165 4166 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4167 SourceLocation TemplateKWLoc, 4168 LookupResult &R, 4169 bool RequiresADL, 4170 const TemplateArgumentListInfo *TemplateArgs); 4171 4172 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4173 SourceLocation TemplateKWLoc, 4174 const DeclarationNameInfo &NameInfo, 4175 const TemplateArgumentListInfo *TemplateArgs); 4176 4177 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4178 CXXScopeSpec &SS, 4179 SourceLocation TemplateKWLoc, 4180 UnqualifiedId &Name, 4181 ParsedType ObjectType, 4182 bool EnteringContext, 4183 TemplateTy &Template); 4184 4185 DeclResult 4186 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4187 SourceLocation KWLoc, 4188 SourceLocation ModulePrivateLoc, 4189 CXXScopeSpec &SS, 4190 TemplateTy Template, 4191 SourceLocation TemplateNameLoc, 4192 SourceLocation LAngleLoc, 4193 ASTTemplateArgsPtr TemplateArgs, 4194 SourceLocation RAngleLoc, 4195 AttributeList *Attr, 4196 MultiTemplateParamsArg TemplateParameterLists); 4197 4198 Decl *ActOnTemplateDeclarator(Scope *S, 4199 MultiTemplateParamsArg TemplateParameterLists, 4200 Declarator &D); 4201 4202 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4203 MultiTemplateParamsArg TemplateParameterLists, 4204 Declarator &D); 4205 4206 bool 4207 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4208 TemplateSpecializationKind NewTSK, 4209 NamedDecl *PrevDecl, 4210 TemplateSpecializationKind PrevTSK, 4211 SourceLocation PrevPtOfInstantiation, 4212 bool &SuppressNew); 4213 4214 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4215 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4216 LookupResult &Previous); 4217 4218 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4219 TemplateArgumentListInfo *ExplicitTemplateArgs, 4220 LookupResult &Previous); 4221 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4222 4223 DeclResult 4224 ActOnExplicitInstantiation(Scope *S, 4225 SourceLocation ExternLoc, 4226 SourceLocation TemplateLoc, 4227 unsigned TagSpec, 4228 SourceLocation KWLoc, 4229 const CXXScopeSpec &SS, 4230 TemplateTy Template, 4231 SourceLocation TemplateNameLoc, 4232 SourceLocation LAngleLoc, 4233 ASTTemplateArgsPtr TemplateArgs, 4234 SourceLocation RAngleLoc, 4235 AttributeList *Attr); 4236 4237 DeclResult 4238 ActOnExplicitInstantiation(Scope *S, 4239 SourceLocation ExternLoc, 4240 SourceLocation TemplateLoc, 4241 unsigned TagSpec, 4242 SourceLocation KWLoc, 4243 CXXScopeSpec &SS, 4244 IdentifierInfo *Name, 4245 SourceLocation NameLoc, 4246 AttributeList *Attr); 4247 4248 DeclResult ActOnExplicitInstantiation(Scope *S, 4249 SourceLocation ExternLoc, 4250 SourceLocation TemplateLoc, 4251 Declarator &D); 4252 4253 TemplateArgumentLoc 4254 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4255 SourceLocation TemplateLoc, 4256 SourceLocation RAngleLoc, 4257 Decl *Param, 4258 SmallVectorImpl<TemplateArgument> &Converted); 4259 4260 /// \brief Specifies the context in which a particular template 4261 /// argument is being checked. 4262 enum CheckTemplateArgumentKind { 4263 /// \brief The template argument was specified in the code or was 4264 /// instantiated with some deduced template arguments. 4265 CTAK_Specified, 4266 4267 /// \brief The template argument was deduced via template argument 4268 /// deduction. 4269 CTAK_Deduced, 4270 4271 /// \brief The template argument was deduced from an array bound 4272 /// via template argument deduction. 4273 CTAK_DeducedFromArrayBound 4274 }; 4275 4276 bool CheckTemplateArgument(NamedDecl *Param, 4277 const TemplateArgumentLoc &Arg, 4278 NamedDecl *Template, 4279 SourceLocation TemplateLoc, 4280 SourceLocation RAngleLoc, 4281 unsigned ArgumentPackIndex, 4282 SmallVectorImpl<TemplateArgument> &Converted, 4283 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4284 4285 /// \brief Check that the given template arguments can be be provided to 4286 /// the given template, converting the arguments along the way. 4287 /// 4288 /// \param Template The template to which the template arguments are being 4289 /// provided. 4290 /// 4291 /// \param TemplateLoc The location of the template name in the source. 4292 /// 4293 /// \param TemplateArgs The list of template arguments. If the template is 4294 /// a template template parameter, this function may extend the set of 4295 /// template arguments to also include substituted, defaulted template 4296 /// arguments. 4297 /// 4298 /// \param PartialTemplateArgs True if the list of template arguments is 4299 /// intentionally partial, e.g., because we're checking just the initial 4300 /// set of template arguments. 4301 /// 4302 /// \param Converted Will receive the converted, canonicalized template 4303 /// arguments. 4304 /// 4305 /// 4306 /// \param ExpansionIntoFixedList If non-NULL, will be set true to indicate 4307 /// when the template arguments contain a pack expansion that is being 4308 /// expanded into a fixed parameter list. 4309 /// 4310 /// \returns True if an error occurred, false otherwise. 4311 bool CheckTemplateArgumentList(TemplateDecl *Template, 4312 SourceLocation TemplateLoc, 4313 TemplateArgumentListInfo &TemplateArgs, 4314 bool PartialTemplateArgs, 4315 SmallVectorImpl<TemplateArgument> &Converted, 4316 bool *ExpansionIntoFixedList = 0); 4317 4318 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4319 const TemplateArgumentLoc &Arg, 4320 SmallVectorImpl<TemplateArgument> &Converted); 4321 4322 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4323 TypeSourceInfo *Arg); 4324 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4325 TemplateArgument &Converted); 4326 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4327 QualType InstantiatedParamType, Expr *Arg, 4328 TemplateArgument &Converted, 4329 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4330 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4331 const TemplateArgumentLoc &Arg); 4332 4333 ExprResult 4334 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4335 QualType ParamType, 4336 SourceLocation Loc); 4337 ExprResult 4338 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4339 SourceLocation Loc); 4340 4341 /// \brief Enumeration describing how template parameter lists are compared 4342 /// for equality. 4343 enum TemplateParameterListEqualKind { 4344 /// \brief We are matching the template parameter lists of two templates 4345 /// that might be redeclarations. 4346 /// 4347 /// \code 4348 /// template<typename T> struct X; 4349 /// template<typename T> struct X; 4350 /// \endcode 4351 TPL_TemplateMatch, 4352 4353 /// \brief We are matching the template parameter lists of two template 4354 /// template parameters as part of matching the template parameter lists 4355 /// of two templates that might be redeclarations. 4356 /// 4357 /// \code 4358 /// template<template<int I> class TT> struct X; 4359 /// template<template<int Value> class Other> struct X; 4360 /// \endcode 4361 TPL_TemplateTemplateParmMatch, 4362 4363 /// \brief We are matching the template parameter lists of a template 4364 /// template argument against the template parameter lists of a template 4365 /// template parameter. 4366 /// 4367 /// \code 4368 /// template<template<int Value> class Metafun> struct X; 4369 /// template<int Value> struct integer_c; 4370 /// X<integer_c> xic; 4371 /// \endcode 4372 TPL_TemplateTemplateArgumentMatch 4373 }; 4374 4375 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4376 TemplateParameterList *Old, 4377 bool Complain, 4378 TemplateParameterListEqualKind Kind, 4379 SourceLocation TemplateArgLoc 4380 = SourceLocation()); 4381 4382 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4383 4384 /// \brief Called when the parser has parsed a C++ typename 4385 /// specifier, e.g., "typename T::type". 4386 /// 4387 /// \param S The scope in which this typename type occurs. 4388 /// \param TypenameLoc the location of the 'typename' keyword 4389 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4390 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4391 /// \param IdLoc the location of the identifier. 4392 TypeResult 4393 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4394 const CXXScopeSpec &SS, const IdentifierInfo &II, 4395 SourceLocation IdLoc); 4396 4397 /// \brief Called when the parser has parsed a C++ typename 4398 /// specifier that ends in a template-id, e.g., 4399 /// "typename MetaFun::template apply<T1, T2>". 4400 /// 4401 /// \param S The scope in which this typename type occurs. 4402 /// \param TypenameLoc the location of the 'typename' keyword 4403 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4404 /// \param TemplateLoc the location of the 'template' keyword, if any. 4405 /// \param TemplateName The template name. 4406 /// \param TemplateNameLoc The location of the template name. 4407 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4408 /// \param TemplateArgs The template arguments. 4409 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4410 TypeResult 4411 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4412 const CXXScopeSpec &SS, 4413 SourceLocation TemplateLoc, 4414 TemplateTy Template, 4415 SourceLocation TemplateNameLoc, 4416 SourceLocation LAngleLoc, 4417 ASTTemplateArgsPtr TemplateArgs, 4418 SourceLocation RAngleLoc); 4419 4420 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4421 SourceLocation KeywordLoc, 4422 NestedNameSpecifierLoc QualifierLoc, 4423 const IdentifierInfo &II, 4424 SourceLocation IILoc); 4425 4426 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4427 SourceLocation Loc, 4428 DeclarationName Name); 4429 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4430 4431 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4432 bool RebuildTemplateParamsInCurrentInstantiation( 4433 TemplateParameterList *Params); 4434 4435 std::string 4436 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4437 const TemplateArgumentList &Args); 4438 4439 std::string 4440 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4441 const TemplateArgument *Args, 4442 unsigned NumArgs); 4443 4444 //===--------------------------------------------------------------------===// 4445 // C++ Variadic Templates (C++0x [temp.variadic]) 4446 //===--------------------------------------------------------------------===// 4447 4448 /// \brief The context in which an unexpanded parameter pack is 4449 /// being diagnosed. 4450 /// 4451 /// Note that the values of this enumeration line up with the first 4452 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4453 enum UnexpandedParameterPackContext { 4454 /// \brief An arbitrary expression. 4455 UPPC_Expression = 0, 4456 4457 /// \brief The base type of a class type. 4458 UPPC_BaseType, 4459 4460 /// \brief The type of an arbitrary declaration. 4461 UPPC_DeclarationType, 4462 4463 /// \brief The type of a data member. 4464 UPPC_DataMemberType, 4465 4466 /// \brief The size of a bit-field. 4467 UPPC_BitFieldWidth, 4468 4469 /// \brief The expression in a static assertion. 4470 UPPC_StaticAssertExpression, 4471 4472 /// \brief The fixed underlying type of an enumeration. 4473 UPPC_FixedUnderlyingType, 4474 4475 /// \brief The enumerator value. 4476 UPPC_EnumeratorValue, 4477 4478 /// \brief A using declaration. 4479 UPPC_UsingDeclaration, 4480 4481 /// \brief A friend declaration. 4482 UPPC_FriendDeclaration, 4483 4484 /// \brief A declaration qualifier. 4485 UPPC_DeclarationQualifier, 4486 4487 /// \brief An initializer. 4488 UPPC_Initializer, 4489 4490 /// \brief A default argument. 4491 UPPC_DefaultArgument, 4492 4493 /// \brief The type of a non-type template parameter. 4494 UPPC_NonTypeTemplateParameterType, 4495 4496 /// \brief The type of an exception. 4497 UPPC_ExceptionType, 4498 4499 /// \brief Partial specialization. 4500 UPPC_PartialSpecialization, 4501 4502 /// \brief Microsoft __if_exists. 4503 UPPC_IfExists, 4504 4505 /// \brief Microsoft __if_not_exists. 4506 UPPC_IfNotExists 4507}; 4508 4509 /// \brief Diagnose unexpanded parameter packs. 4510 /// 4511 /// \param Loc The location at which we should emit the diagnostic. 4512 /// 4513 /// \param UPPC The context in which we are diagnosing unexpanded 4514 /// parameter packs. 4515 /// 4516 /// \param Unexpanded the set of unexpanded parameter packs. 4517 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4518 UnexpandedParameterPackContext UPPC, 4519 ArrayRef<UnexpandedParameterPack> Unexpanded); 4520 4521 /// \brief If the given type contains an unexpanded parameter pack, 4522 /// diagnose the error. 4523 /// 4524 /// \param Loc The source location where a diagnostc should be emitted. 4525 /// 4526 /// \param T The type that is being checked for unexpanded parameter 4527 /// packs. 4528 /// 4529 /// \returns true if an error occurred, false otherwise. 4530 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4531 UnexpandedParameterPackContext UPPC); 4532 4533 /// \brief If the given expression contains an unexpanded parameter 4534 /// pack, diagnose the error. 4535 /// 4536 /// \param E The expression that is being checked for unexpanded 4537 /// parameter packs. 4538 /// 4539 /// \returns true if an error occurred, false otherwise. 4540 bool DiagnoseUnexpandedParameterPack(Expr *E, 4541 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4542 4543 /// \brief If the given nested-name-specifier contains an unexpanded 4544 /// parameter pack, diagnose the error. 4545 /// 4546 /// \param SS The nested-name-specifier that is being checked for 4547 /// unexpanded parameter packs. 4548 /// 4549 /// \returns true if an error occurred, false otherwise. 4550 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4551 UnexpandedParameterPackContext UPPC); 4552 4553 /// \brief If the given name contains an unexpanded parameter pack, 4554 /// diagnose the error. 4555 /// 4556 /// \param NameInfo The name (with source location information) that 4557 /// is being checked for unexpanded parameter packs. 4558 /// 4559 /// \returns true if an error occurred, false otherwise. 4560 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4561 UnexpandedParameterPackContext UPPC); 4562 4563 /// \brief If the given template name contains an unexpanded parameter pack, 4564 /// diagnose the error. 4565 /// 4566 /// \param Loc The location of the template name. 4567 /// 4568 /// \param Template The template name that is being checked for unexpanded 4569 /// parameter packs. 4570 /// 4571 /// \returns true if an error occurred, false otherwise. 4572 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4573 TemplateName Template, 4574 UnexpandedParameterPackContext UPPC); 4575 4576 /// \brief If the given template argument contains an unexpanded parameter 4577 /// pack, diagnose the error. 4578 /// 4579 /// \param Arg The template argument that is being checked for unexpanded 4580 /// parameter packs. 4581 /// 4582 /// \returns true if an error occurred, false otherwise. 4583 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4584 UnexpandedParameterPackContext UPPC); 4585 4586 /// \brief Collect the set of unexpanded parameter packs within the given 4587 /// template argument. 4588 /// 4589 /// \param Arg The template argument that will be traversed to find 4590 /// unexpanded parameter packs. 4591 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4592 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4593 4594 /// \brief Collect the set of unexpanded parameter packs within the given 4595 /// template argument. 4596 /// 4597 /// \param Arg The template argument that will be traversed to find 4598 /// unexpanded parameter packs. 4599 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4600 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4601 4602 /// \brief Collect the set of unexpanded parameter packs within the given 4603 /// type. 4604 /// 4605 /// \param T The type that will be traversed to find 4606 /// unexpanded parameter packs. 4607 void collectUnexpandedParameterPacks(QualType T, 4608 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4609 4610 /// \brief Collect the set of unexpanded parameter packs within the given 4611 /// type. 4612 /// 4613 /// \param TL The type that will be traversed to find 4614 /// unexpanded parameter packs. 4615 void collectUnexpandedParameterPacks(TypeLoc TL, 4616 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4617 4618 /// \brief Collect the set of unexpanded parameter packs within the given 4619 /// nested-name-specifier. 4620 /// 4621 /// \param SS The nested-name-specifier that will be traversed to find 4622 /// unexpanded parameter packs. 4623 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4624 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4625 4626 /// \brief Collect the set of unexpanded parameter packs within the given 4627 /// name. 4628 /// 4629 /// \param NameInfo The name that will be traversed to find 4630 /// unexpanded parameter packs. 4631 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4632 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4633 4634 /// \brief Invoked when parsing a template argument followed by an 4635 /// ellipsis, which creates a pack expansion. 4636 /// 4637 /// \param Arg The template argument preceding the ellipsis, which 4638 /// may already be invalid. 4639 /// 4640 /// \param EllipsisLoc The location of the ellipsis. 4641 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4642 SourceLocation EllipsisLoc); 4643 4644 /// \brief Invoked when parsing a type followed by an ellipsis, which 4645 /// creates a pack expansion. 4646 /// 4647 /// \param Type The type preceding the ellipsis, which will become 4648 /// the pattern of the pack expansion. 4649 /// 4650 /// \param EllipsisLoc The location of the ellipsis. 4651 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4652 4653 /// \brief Construct a pack expansion type from the pattern of the pack 4654 /// expansion. 4655 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4656 SourceLocation EllipsisLoc, 4657 llvm::Optional<unsigned> NumExpansions); 4658 4659 /// \brief Construct a pack expansion type from the pattern of the pack 4660 /// expansion. 4661 QualType CheckPackExpansion(QualType Pattern, 4662 SourceRange PatternRange, 4663 SourceLocation EllipsisLoc, 4664 llvm::Optional<unsigned> NumExpansions); 4665 4666 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4667 /// creates a pack expansion. 4668 /// 4669 /// \param Pattern The expression preceding the ellipsis, which will become 4670 /// the pattern of the pack expansion. 4671 /// 4672 /// \param EllipsisLoc The location of the ellipsis. 4673 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4674 4675 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4676 /// creates a pack expansion. 4677 /// 4678 /// \param Pattern The expression preceding the ellipsis, which will become 4679 /// the pattern of the pack expansion. 4680 /// 4681 /// \param EllipsisLoc The location of the ellipsis. 4682 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4683 llvm::Optional<unsigned> NumExpansions); 4684 4685 /// \brief Determine whether we could expand a pack expansion with the 4686 /// given set of parameter packs into separate arguments by repeatedly 4687 /// transforming the pattern. 4688 /// 4689 /// \param EllipsisLoc The location of the ellipsis that identifies the 4690 /// pack expansion. 4691 /// 4692 /// \param PatternRange The source range that covers the entire pattern of 4693 /// the pack expansion. 4694 /// 4695 /// \param Unexpanded The set of unexpanded parameter packs within the 4696 /// pattern. 4697 /// 4698 /// \param NumUnexpanded The number of unexpanded parameter packs in 4699 /// \p Unexpanded. 4700 /// 4701 /// \param ShouldExpand Will be set to \c true if the transformer should 4702 /// expand the corresponding pack expansions into separate arguments. When 4703 /// set, \c NumExpansions must also be set. 4704 /// 4705 /// \param RetainExpansion Whether the caller should add an unexpanded 4706 /// pack expansion after all of the expanded arguments. This is used 4707 /// when extending explicitly-specified template argument packs per 4708 /// C++0x [temp.arg.explicit]p9. 4709 /// 4710 /// \param NumExpansions The number of separate arguments that will be in 4711 /// the expanded form of the corresponding pack expansion. This is both an 4712 /// input and an output parameter, which can be set by the caller if the 4713 /// number of expansions is known a priori (e.g., due to a prior substitution) 4714 /// and will be set by the callee when the number of expansions is known. 4715 /// The callee must set this value when \c ShouldExpand is \c true; it may 4716 /// set this value in other cases. 4717 /// 4718 /// \returns true if an error occurred (e.g., because the parameter packs 4719 /// are to be instantiated with arguments of different lengths), false 4720 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4721 /// must be set. 4722 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4723 SourceRange PatternRange, 4724 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4725 const MultiLevelTemplateArgumentList &TemplateArgs, 4726 bool &ShouldExpand, 4727 bool &RetainExpansion, 4728 llvm::Optional<unsigned> &NumExpansions); 4729 4730 /// \brief Determine the number of arguments in the given pack expansion 4731 /// type. 4732 /// 4733 /// This routine already assumes that the pack expansion type can be 4734 /// expanded and that the number of arguments in the expansion is 4735 /// consistent across all of the unexpanded parameter packs in its pattern. 4736 unsigned getNumArgumentsInExpansion(QualType T, 4737 const MultiLevelTemplateArgumentList &TemplateArgs); 4738 4739 /// \brief Determine whether the given declarator contains any unexpanded 4740 /// parameter packs. 4741 /// 4742 /// This routine is used by the parser to disambiguate function declarators 4743 /// with an ellipsis prior to the ')', e.g., 4744 /// 4745 /// \code 4746 /// void f(T...); 4747 /// \endcode 4748 /// 4749 /// To determine whether we have an (unnamed) function parameter pack or 4750 /// a variadic function. 4751 /// 4752 /// \returns true if the declarator contains any unexpanded parameter packs, 4753 /// false otherwise. 4754 bool containsUnexpandedParameterPacks(Declarator &D); 4755 4756 //===--------------------------------------------------------------------===// 4757 // C++ Template Argument Deduction (C++ [temp.deduct]) 4758 //===--------------------------------------------------------------------===// 4759 4760 /// \brief Describes the result of template argument deduction. 4761 /// 4762 /// The TemplateDeductionResult enumeration describes the result of 4763 /// template argument deduction, as returned from 4764 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4765 /// structure provides additional information about the results of 4766 /// template argument deduction, e.g., the deduced template argument 4767 /// list (if successful) or the specific template parameters or 4768 /// deduced arguments that were involved in the failure. 4769 enum TemplateDeductionResult { 4770 /// \brief Template argument deduction was successful. 4771 TDK_Success = 0, 4772 /// \brief Template argument deduction exceeded the maximum template 4773 /// instantiation depth (which has already been diagnosed). 4774 TDK_InstantiationDepth, 4775 /// \brief Template argument deduction did not deduce a value 4776 /// for every template parameter. 4777 TDK_Incomplete, 4778 /// \brief Template argument deduction produced inconsistent 4779 /// deduced values for the given template parameter. 4780 TDK_Inconsistent, 4781 /// \brief Template argument deduction failed due to inconsistent 4782 /// cv-qualifiers on a template parameter type that would 4783 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4784 /// but were given a non-const "X". 4785 TDK_Underqualified, 4786 /// \brief Substitution of the deduced template argument values 4787 /// resulted in an error. 4788 TDK_SubstitutionFailure, 4789 /// \brief Substitution of the deduced template argument values 4790 /// into a non-deduced context produced a type or value that 4791 /// produces a type that does not match the original template 4792 /// arguments provided. 4793 TDK_NonDeducedMismatch, 4794 /// \brief When performing template argument deduction for a function 4795 /// template, there were too many call arguments. 4796 TDK_TooManyArguments, 4797 /// \brief When performing template argument deduction for a function 4798 /// template, there were too few call arguments. 4799 TDK_TooFewArguments, 4800 /// \brief The explicitly-specified template arguments were not valid 4801 /// template arguments for the given template. 4802 TDK_InvalidExplicitArguments, 4803 /// \brief The arguments included an overloaded function name that could 4804 /// not be resolved to a suitable function. 4805 TDK_FailedOverloadResolution 4806 }; 4807 4808 TemplateDeductionResult 4809 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4810 const TemplateArgumentList &TemplateArgs, 4811 sema::TemplateDeductionInfo &Info); 4812 4813 TemplateDeductionResult 4814 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4815 TemplateArgumentListInfo &ExplicitTemplateArgs, 4816 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4817 SmallVectorImpl<QualType> &ParamTypes, 4818 QualType *FunctionType, 4819 sema::TemplateDeductionInfo &Info); 4820 4821 /// brief A function argument from which we performed template argument 4822 // deduction for a call. 4823 struct OriginalCallArg { 4824 OriginalCallArg(QualType OriginalParamType, 4825 unsigned ArgIdx, 4826 QualType OriginalArgType) 4827 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4828 OriginalArgType(OriginalArgType) { } 4829 4830 QualType OriginalParamType; 4831 unsigned ArgIdx; 4832 QualType OriginalArgType; 4833 }; 4834 4835 TemplateDeductionResult 4836 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4837 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4838 unsigned NumExplicitlySpecified, 4839 FunctionDecl *&Specialization, 4840 sema::TemplateDeductionInfo &Info, 4841 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4842 4843 TemplateDeductionResult 4844 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4845 TemplateArgumentListInfo *ExplicitTemplateArgs, 4846 llvm::ArrayRef<Expr *> Args, 4847 FunctionDecl *&Specialization, 4848 sema::TemplateDeductionInfo &Info); 4849 4850 TemplateDeductionResult 4851 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4852 TemplateArgumentListInfo *ExplicitTemplateArgs, 4853 QualType ArgFunctionType, 4854 FunctionDecl *&Specialization, 4855 sema::TemplateDeductionInfo &Info); 4856 4857 TemplateDeductionResult 4858 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4859 QualType ToType, 4860 CXXConversionDecl *&Specialization, 4861 sema::TemplateDeductionInfo &Info); 4862 4863 TemplateDeductionResult 4864 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4865 TemplateArgumentListInfo *ExplicitTemplateArgs, 4866 FunctionDecl *&Specialization, 4867 sema::TemplateDeductionInfo &Info); 4868 4869 /// \brief Result type of DeduceAutoType. 4870 enum DeduceAutoResult { 4871 DAR_Succeeded, 4872 DAR_Failed, 4873 DAR_FailedAlreadyDiagnosed 4874 }; 4875 4876 DeduceAutoResult DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4877 TypeSourceInfo *&Result); 4878 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4879 4880 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4881 FunctionTemplateDecl *FT2, 4882 SourceLocation Loc, 4883 TemplatePartialOrderingContext TPOC, 4884 unsigned NumCallArguments); 4885 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4886 UnresolvedSetIterator SEnd, 4887 TemplatePartialOrderingContext TPOC, 4888 unsigned NumCallArguments, 4889 SourceLocation Loc, 4890 const PartialDiagnostic &NoneDiag, 4891 const PartialDiagnostic &AmbigDiag, 4892 const PartialDiagnostic &CandidateDiag, 4893 bool Complain = true, 4894 QualType TargetType = QualType()); 4895 4896 ClassTemplatePartialSpecializationDecl * 4897 getMoreSpecializedPartialSpecialization( 4898 ClassTemplatePartialSpecializationDecl *PS1, 4899 ClassTemplatePartialSpecializationDecl *PS2, 4900 SourceLocation Loc); 4901 4902 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4903 bool OnlyDeduced, 4904 unsigned Depth, 4905 llvm::SmallBitVector &Used); 4906 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4907 llvm::SmallBitVector &Deduced) { 4908 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4909 } 4910 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4911 FunctionTemplateDecl *FunctionTemplate, 4912 llvm::SmallBitVector &Deduced); 4913 4914 //===--------------------------------------------------------------------===// 4915 // C++ Template Instantiation 4916 // 4917 4918 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4919 const TemplateArgumentList *Innermost = 0, 4920 bool RelativeToPrimary = false, 4921 const FunctionDecl *Pattern = 0); 4922 4923 /// \brief A template instantiation that is currently in progress. 4924 struct ActiveTemplateInstantiation { 4925 /// \brief The kind of template instantiation we are performing 4926 enum InstantiationKind { 4927 /// We are instantiating a template declaration. The entity is 4928 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4929 TemplateInstantiation, 4930 4931 /// We are instantiating a default argument for a template 4932 /// parameter. The Entity is the template, and 4933 /// TemplateArgs/NumTemplateArguments provides the template 4934 /// arguments as specified. 4935 /// FIXME: Use a TemplateArgumentList 4936 DefaultTemplateArgumentInstantiation, 4937 4938 /// We are instantiating a default argument for a function. 4939 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4940 /// provides the template arguments as specified. 4941 DefaultFunctionArgumentInstantiation, 4942 4943 /// We are substituting explicit template arguments provided for 4944 /// a function template. The entity is a FunctionTemplateDecl. 4945 ExplicitTemplateArgumentSubstitution, 4946 4947 /// We are substituting template argument determined as part of 4948 /// template argument deduction for either a class template 4949 /// partial specialization or a function template. The 4950 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4951 /// a FunctionTemplateDecl. 4952 DeducedTemplateArgumentSubstitution, 4953 4954 /// We are substituting prior template arguments into a new 4955 /// template parameter. The template parameter itself is either a 4956 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4957 PriorTemplateArgumentSubstitution, 4958 4959 /// We are checking the validity of a default template argument that 4960 /// has been used when naming a template-id. 4961 DefaultTemplateArgumentChecking 4962 } Kind; 4963 4964 /// \brief The point of instantiation within the source code. 4965 SourceLocation PointOfInstantiation; 4966 4967 /// \brief The template (or partial specialization) in which we are 4968 /// performing the instantiation, for substitutions of prior template 4969 /// arguments. 4970 NamedDecl *Template; 4971 4972 /// \brief The entity that is being instantiated. 4973 uintptr_t Entity; 4974 4975 /// \brief The list of template arguments we are substituting, if they 4976 /// are not part of the entity. 4977 const TemplateArgument *TemplateArgs; 4978 4979 /// \brief The number of template arguments in TemplateArgs. 4980 unsigned NumTemplateArgs; 4981 4982 /// \brief The template deduction info object associated with the 4983 /// substitution or checking of explicit or deduced template arguments. 4984 sema::TemplateDeductionInfo *DeductionInfo; 4985 4986 /// \brief The source range that covers the construct that cause 4987 /// the instantiation, e.g., the template-id that causes a class 4988 /// template instantiation. 4989 SourceRange InstantiationRange; 4990 4991 ActiveTemplateInstantiation() 4992 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4993 NumTemplateArgs(0), DeductionInfo(0) {} 4994 4995 /// \brief Determines whether this template is an actual instantiation 4996 /// that should be counted toward the maximum instantiation depth. 4997 bool isInstantiationRecord() const; 4998 4999 friend bool operator==(const ActiveTemplateInstantiation &X, 5000 const ActiveTemplateInstantiation &Y) { 5001 if (X.Kind != Y.Kind) 5002 return false; 5003 5004 if (X.Entity != Y.Entity) 5005 return false; 5006 5007 switch (X.Kind) { 5008 case TemplateInstantiation: 5009 return true; 5010 5011 case PriorTemplateArgumentSubstitution: 5012 case DefaultTemplateArgumentChecking: 5013 if (X.Template != Y.Template) 5014 return false; 5015 5016 // Fall through 5017 5018 case DefaultTemplateArgumentInstantiation: 5019 case ExplicitTemplateArgumentSubstitution: 5020 case DeducedTemplateArgumentSubstitution: 5021 case DefaultFunctionArgumentInstantiation: 5022 return X.TemplateArgs == Y.TemplateArgs; 5023 5024 } 5025 5026 llvm_unreachable("Invalid InstantiationKind!"); 5027 } 5028 5029 friend bool operator!=(const ActiveTemplateInstantiation &X, 5030 const ActiveTemplateInstantiation &Y) { 5031 return !(X == Y); 5032 } 5033 }; 5034 5035 /// \brief List of active template instantiations. 5036 /// 5037 /// This vector is treated as a stack. As one template instantiation 5038 /// requires another template instantiation, additional 5039 /// instantiations are pushed onto the stack up to a 5040 /// user-configurable limit LangOptions::InstantiationDepth. 5041 SmallVector<ActiveTemplateInstantiation, 16> 5042 ActiveTemplateInstantiations; 5043 5044 /// \brief Whether we are in a SFINAE context that is not associated with 5045 /// template instantiation. 5046 /// 5047 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 5048 /// of a template instantiation or template argument deduction. 5049 bool InNonInstantiationSFINAEContext; 5050 5051 /// \brief The number of ActiveTemplateInstantiation entries in 5052 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 5053 /// therefore, should not be counted as part of the instantiation depth. 5054 unsigned NonInstantiationEntries; 5055 5056 /// \brief The last template from which a template instantiation 5057 /// error or warning was produced. 5058 /// 5059 /// This value is used to suppress printing of redundant template 5060 /// instantiation backtraces when there are multiple errors in the 5061 /// same instantiation. FIXME: Does this belong in Sema? It's tough 5062 /// to implement it anywhere else. 5063 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 5064 5065 /// \brief The current index into pack expansion arguments that will be 5066 /// used for substitution of parameter packs. 5067 /// 5068 /// The pack expansion index will be -1 to indicate that parameter packs 5069 /// should be instantiated as themselves. Otherwise, the index specifies 5070 /// which argument within the parameter pack will be used for substitution. 5071 int ArgumentPackSubstitutionIndex; 5072 5073 /// \brief RAII object used to change the argument pack substitution index 5074 /// within a \c Sema object. 5075 /// 5076 /// See \c ArgumentPackSubstitutionIndex for more information. 5077 class ArgumentPackSubstitutionIndexRAII { 5078 Sema &Self; 5079 int OldSubstitutionIndex; 5080 5081 public: 5082 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 5083 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 5084 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 5085 } 5086 5087 ~ArgumentPackSubstitutionIndexRAII() { 5088 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 5089 } 5090 }; 5091 5092 friend class ArgumentPackSubstitutionRAII; 5093 5094 /// \brief The stack of calls expression undergoing template instantiation. 5095 /// 5096 /// The top of this stack is used by a fixit instantiating unresolved 5097 /// function calls to fix the AST to match the textual change it prints. 5098 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 5099 5100 /// \brief For each declaration that involved template argument deduction, the 5101 /// set of diagnostics that were suppressed during that template argument 5102 /// deduction. 5103 /// 5104 /// FIXME: Serialize this structure to the AST file. 5105 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 5106 SuppressedDiagnostics; 5107 5108 /// \brief A stack object to be created when performing template 5109 /// instantiation. 5110 /// 5111 /// Construction of an object of type \c InstantiatingTemplate 5112 /// pushes the current instantiation onto the stack of active 5113 /// instantiations. If the size of this stack exceeds the maximum 5114 /// number of recursive template instantiations, construction 5115 /// produces an error and evaluates true. 5116 /// 5117 /// Destruction of this object will pop the named instantiation off 5118 /// the stack. 5119 struct InstantiatingTemplate { 5120 /// \brief Note that we are instantiating a class template, 5121 /// function template, or a member thereof. 5122 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5123 Decl *Entity, 5124 SourceRange InstantiationRange = SourceRange()); 5125 5126 /// \brief Note that we are instantiating a default argument in a 5127 /// template-id. 5128 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5129 TemplateDecl *Template, 5130 const TemplateArgument *TemplateArgs, 5131 unsigned NumTemplateArgs, 5132 SourceRange InstantiationRange = SourceRange()); 5133 5134 /// \brief Note that we are instantiating a default argument in a 5135 /// template-id. 5136 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5137 FunctionTemplateDecl *FunctionTemplate, 5138 const TemplateArgument *TemplateArgs, 5139 unsigned NumTemplateArgs, 5140 ActiveTemplateInstantiation::InstantiationKind Kind, 5141 sema::TemplateDeductionInfo &DeductionInfo, 5142 SourceRange InstantiationRange = SourceRange()); 5143 5144 /// \brief Note that we are instantiating as part of template 5145 /// argument deduction for a class template partial 5146 /// specialization. 5147 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5148 ClassTemplatePartialSpecializationDecl *PartialSpec, 5149 const TemplateArgument *TemplateArgs, 5150 unsigned NumTemplateArgs, 5151 sema::TemplateDeductionInfo &DeductionInfo, 5152 SourceRange InstantiationRange = SourceRange()); 5153 5154 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5155 ParmVarDecl *Param, 5156 const TemplateArgument *TemplateArgs, 5157 unsigned NumTemplateArgs, 5158 SourceRange InstantiationRange = SourceRange()); 5159 5160 /// \brief Note that we are substituting prior template arguments into a 5161 /// non-type or template template parameter. 5162 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5163 NamedDecl *Template, 5164 NonTypeTemplateParmDecl *Param, 5165 const TemplateArgument *TemplateArgs, 5166 unsigned NumTemplateArgs, 5167 SourceRange InstantiationRange); 5168 5169 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5170 NamedDecl *Template, 5171 TemplateTemplateParmDecl *Param, 5172 const TemplateArgument *TemplateArgs, 5173 unsigned NumTemplateArgs, 5174 SourceRange InstantiationRange); 5175 5176 /// \brief Note that we are checking the default template argument 5177 /// against the template parameter for a given template-id. 5178 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5179 TemplateDecl *Template, 5180 NamedDecl *Param, 5181 const TemplateArgument *TemplateArgs, 5182 unsigned NumTemplateArgs, 5183 SourceRange InstantiationRange); 5184 5185 5186 /// \brief Note that we have finished instantiating this template. 5187 void Clear(); 5188 5189 ~InstantiatingTemplate() { Clear(); } 5190 5191 /// \brief Determines whether we have exceeded the maximum 5192 /// recursive template instantiations. 5193 operator bool() const { return Invalid; } 5194 5195 private: 5196 Sema &SemaRef; 5197 bool Invalid; 5198 bool SavedInNonInstantiationSFINAEContext; 5199 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5200 SourceRange InstantiationRange); 5201 5202 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5203 5204 InstantiatingTemplate& 5205 operator=(const InstantiatingTemplate&); // not implemented 5206 }; 5207 5208 void PrintInstantiationStack(); 5209 5210 /// \brief Determines whether we are currently in a context where 5211 /// template argument substitution failures are not considered 5212 /// errors. 5213 /// 5214 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5215 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5216 /// template-deduction context object, which can be used to capture 5217 /// diagnostics that will be suppressed. 5218 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5219 5220 /// \brief RAII class used to determine whether SFINAE has 5221 /// trapped any errors that occur during template argument 5222 /// deduction.` 5223 class SFINAETrap { 5224 Sema &SemaRef; 5225 unsigned PrevSFINAEErrors; 5226 bool PrevInNonInstantiationSFINAEContext; 5227 bool PrevAccessCheckingSFINAE; 5228 5229 public: 5230 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5231 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5232 PrevInNonInstantiationSFINAEContext( 5233 SemaRef.InNonInstantiationSFINAEContext), 5234 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5235 { 5236 if (!SemaRef.isSFINAEContext()) 5237 SemaRef.InNonInstantiationSFINAEContext = true; 5238 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5239 } 5240 5241 ~SFINAETrap() { 5242 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5243 SemaRef.InNonInstantiationSFINAEContext 5244 = PrevInNonInstantiationSFINAEContext; 5245 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5246 } 5247 5248 /// \brief Determine whether any SFINAE errors have been trapped. 5249 bool hasErrorOccurred() const { 5250 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5251 } 5252 }; 5253 5254 /// \brief The current instantiation scope used to store local 5255 /// variables. 5256 LocalInstantiationScope *CurrentInstantiationScope; 5257 5258 /// \brief The number of typos corrected by CorrectTypo. 5259 unsigned TyposCorrected; 5260 5261 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5262 UnqualifiedTyposCorrectedMap; 5263 5264 /// \brief A cache containing the results of typo correction for unqualified 5265 /// name lookup. 5266 /// 5267 /// The string is the string that we corrected to (which may be empty, if 5268 /// there was no correction), while the boolean will be true when the 5269 /// string represents a keyword. 5270 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5271 5272 /// \brief Worker object for performing CFG-based warnings. 5273 sema::AnalysisBasedWarnings AnalysisWarnings; 5274 5275 /// \brief An entity for which implicit template instantiation is required. 5276 /// 5277 /// The source location associated with the declaration is the first place in 5278 /// the source code where the declaration was "used". It is not necessarily 5279 /// the point of instantiation (which will be either before or after the 5280 /// namespace-scope declaration that triggered this implicit instantiation), 5281 /// However, it is the location that diagnostics should generally refer to, 5282 /// because users will need to know what code triggered the instantiation. 5283 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5284 5285 /// \brief The queue of implicit template instantiations that are required 5286 /// but have not yet been performed. 5287 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5288 5289 /// \brief The queue of implicit template instantiations that are required 5290 /// and must be performed within the current local scope. 5291 /// 5292 /// This queue is only used for member functions of local classes in 5293 /// templates, which must be instantiated in the same scope as their 5294 /// enclosing function, so that they can reference function-local 5295 /// types, static variables, enumerators, etc. 5296 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5297 5298 void PerformPendingInstantiations(bool LocalOnly = false); 5299 5300 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5301 const MultiLevelTemplateArgumentList &TemplateArgs, 5302 SourceLocation Loc, DeclarationName Entity); 5303 5304 QualType SubstType(QualType T, 5305 const MultiLevelTemplateArgumentList &TemplateArgs, 5306 SourceLocation Loc, DeclarationName Entity); 5307 5308 TypeSourceInfo *SubstType(TypeLoc TL, 5309 const MultiLevelTemplateArgumentList &TemplateArgs, 5310 SourceLocation Loc, DeclarationName Entity); 5311 5312 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5313 const MultiLevelTemplateArgumentList &TemplateArgs, 5314 SourceLocation Loc, 5315 DeclarationName Entity); 5316 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5317 const MultiLevelTemplateArgumentList &TemplateArgs, 5318 int indexAdjustment, 5319 llvm::Optional<unsigned> NumExpansions, 5320 bool ExpectParameterPack); 5321 bool SubstParmTypes(SourceLocation Loc, 5322 ParmVarDecl **Params, unsigned NumParams, 5323 const MultiLevelTemplateArgumentList &TemplateArgs, 5324 SmallVectorImpl<QualType> &ParamTypes, 5325 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5326 ExprResult SubstExpr(Expr *E, 5327 const MultiLevelTemplateArgumentList &TemplateArgs); 5328 5329 /// \brief Substitute the given template arguments into a list of 5330 /// expressions, expanding pack expansions if required. 5331 /// 5332 /// \param Exprs The list of expressions to substitute into. 5333 /// 5334 /// \param NumExprs The number of expressions in \p Exprs. 5335 /// 5336 /// \param IsCall Whether this is some form of call, in which case 5337 /// default arguments will be dropped. 5338 /// 5339 /// \param TemplateArgs The set of template arguments to substitute. 5340 /// 5341 /// \param Outputs Will receive all of the substituted arguments. 5342 /// 5343 /// \returns true if an error occurred, false otherwise. 5344 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5345 const MultiLevelTemplateArgumentList &TemplateArgs, 5346 SmallVectorImpl<Expr *> &Outputs); 5347 5348 StmtResult SubstStmt(Stmt *S, 5349 const MultiLevelTemplateArgumentList &TemplateArgs); 5350 5351 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5352 const MultiLevelTemplateArgumentList &TemplateArgs); 5353 5354 ExprResult SubstInitializer(Expr *E, 5355 const MultiLevelTemplateArgumentList &TemplateArgs, 5356 bool CXXDirectInit); 5357 5358 bool 5359 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5360 CXXRecordDecl *Pattern, 5361 const MultiLevelTemplateArgumentList &TemplateArgs); 5362 5363 bool 5364 InstantiateClass(SourceLocation PointOfInstantiation, 5365 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5366 const MultiLevelTemplateArgumentList &TemplateArgs, 5367 TemplateSpecializationKind TSK, 5368 bool Complain = true); 5369 5370 struct LateInstantiatedAttribute { 5371 const Attr *TmplAttr; 5372 LocalInstantiationScope *Scope; 5373 Decl *NewDecl; 5374 5375 LateInstantiatedAttribute(const Attr *A, LocalInstantiationScope *S, 5376 Decl *D) 5377 : TmplAttr(A), Scope(S), NewDecl(D) 5378 { } 5379 }; 5380 typedef SmallVector<LateInstantiatedAttribute, 16> LateInstantiatedAttrVec; 5381 5382 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5383 const Decl *Pattern, Decl *Inst, 5384 LateInstantiatedAttrVec *LateAttrs = 0, 5385 LocalInstantiationScope *OuterMostScope = 0); 5386 5387 bool 5388 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5389 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5390 TemplateSpecializationKind TSK, 5391 bool Complain = true); 5392 5393 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5394 CXXRecordDecl *Instantiation, 5395 const MultiLevelTemplateArgumentList &TemplateArgs, 5396 TemplateSpecializationKind TSK); 5397 5398 void InstantiateClassTemplateSpecializationMembers( 5399 SourceLocation PointOfInstantiation, 5400 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5401 TemplateSpecializationKind TSK); 5402 5403 NestedNameSpecifierLoc 5404 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5405 const MultiLevelTemplateArgumentList &TemplateArgs); 5406 5407 DeclarationNameInfo 5408 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5409 const MultiLevelTemplateArgumentList &TemplateArgs); 5410 TemplateName 5411 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5412 SourceLocation Loc, 5413 const MultiLevelTemplateArgumentList &TemplateArgs); 5414 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5415 TemplateArgumentListInfo &Result, 5416 const MultiLevelTemplateArgumentList &TemplateArgs); 5417 5418 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5419 FunctionDecl *Function, 5420 bool Recursive = false, 5421 bool DefinitionRequired = false); 5422 void InstantiateStaticDataMemberDefinition( 5423 SourceLocation PointOfInstantiation, 5424 VarDecl *Var, 5425 bool Recursive = false, 5426 bool DefinitionRequired = false); 5427 5428 void InstantiateMemInitializers(CXXConstructorDecl *New, 5429 const CXXConstructorDecl *Tmpl, 5430 const MultiLevelTemplateArgumentList &TemplateArgs); 5431 5432 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5433 const MultiLevelTemplateArgumentList &TemplateArgs); 5434 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5435 const MultiLevelTemplateArgumentList &TemplateArgs); 5436 5437 // Objective-C declarations. 5438 enum ObjCContainerKind { 5439 OCK_None = -1, 5440 OCK_Interface = 0, 5441 OCK_Protocol, 5442 OCK_Category, 5443 OCK_ClassExtension, 5444 OCK_Implementation, 5445 OCK_CategoryImplementation 5446 }; 5447 ObjCContainerKind getObjCContainerKind() const; 5448 5449 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5450 IdentifierInfo *ClassName, 5451 SourceLocation ClassLoc, 5452 IdentifierInfo *SuperName, 5453 SourceLocation SuperLoc, 5454 Decl * const *ProtoRefs, 5455 unsigned NumProtoRefs, 5456 const SourceLocation *ProtoLocs, 5457 SourceLocation EndProtoLoc, 5458 AttributeList *AttrList); 5459 5460 Decl *ActOnCompatiblityAlias( 5461 SourceLocation AtCompatibilityAliasLoc, 5462 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5463 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5464 5465 bool CheckForwardProtocolDeclarationForCircularDependency( 5466 IdentifierInfo *PName, 5467 SourceLocation &PLoc, SourceLocation PrevLoc, 5468 const ObjCList<ObjCProtocolDecl> &PList); 5469 5470 Decl *ActOnStartProtocolInterface( 5471 SourceLocation AtProtoInterfaceLoc, 5472 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5473 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5474 const SourceLocation *ProtoLocs, 5475 SourceLocation EndProtoLoc, 5476 AttributeList *AttrList); 5477 5478 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5479 IdentifierInfo *ClassName, 5480 SourceLocation ClassLoc, 5481 IdentifierInfo *CategoryName, 5482 SourceLocation CategoryLoc, 5483 Decl * const *ProtoRefs, 5484 unsigned NumProtoRefs, 5485 const SourceLocation *ProtoLocs, 5486 SourceLocation EndProtoLoc); 5487 5488 Decl *ActOnStartClassImplementation( 5489 SourceLocation AtClassImplLoc, 5490 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5491 IdentifierInfo *SuperClassname, 5492 SourceLocation SuperClassLoc); 5493 5494 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5495 IdentifierInfo *ClassName, 5496 SourceLocation ClassLoc, 5497 IdentifierInfo *CatName, 5498 SourceLocation CatLoc); 5499 5500 DeclGroupPtrTy ActOnFinishObjCImplementation(Decl *ObjCImpDecl, 5501 ArrayRef<Decl *> Decls); 5502 5503 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5504 IdentifierInfo **IdentList, 5505 SourceLocation *IdentLocs, 5506 unsigned NumElts); 5507 5508 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5509 const IdentifierLocPair *IdentList, 5510 unsigned NumElts, 5511 AttributeList *attrList); 5512 5513 void FindProtocolDeclaration(bool WarnOnDeclarations, 5514 const IdentifierLocPair *ProtocolId, 5515 unsigned NumProtocols, 5516 SmallVectorImpl<Decl *> &Protocols); 5517 5518 /// Ensure attributes are consistent with type. 5519 /// \param [in, out] Attributes The attributes to check; they will 5520 /// be modified to be consistent with \arg PropertyTy. 5521 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5522 SourceLocation Loc, 5523 unsigned &Attributes); 5524 5525 /// Process the specified property declaration and create decls for the 5526 /// setters and getters as needed. 5527 /// \param property The property declaration being processed 5528 /// \param DC The semantic container for the property 5529 /// \param redeclaredProperty Declaration for property if redeclared 5530 /// in class extension. 5531 /// \param lexicalDC Container for redeclaredProperty. 5532 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5533 ObjCContainerDecl *DC, 5534 ObjCPropertyDecl *redeclaredProperty = 0, 5535 ObjCContainerDecl *lexicalDC = 0); 5536 5537 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5538 ObjCPropertyDecl *SuperProperty, 5539 const IdentifierInfo *Name); 5540 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5541 5542 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5543 ObjCMethodDecl *MethodDecl, 5544 bool IsInstance); 5545 5546 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5547 5548 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5549 ObjCInterfaceDecl *ID); 5550 5551 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5552 ObjCProtocolDecl *PDecl); 5553 5554 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5555 Decl **allMethods = 0, unsigned allNum = 0, 5556 Decl **allProperties = 0, unsigned pNum = 0, 5557 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5558 5559 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5560 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5561 Selector GetterSel, Selector SetterSel, 5562 bool *OverridingProperty, 5563 tok::ObjCKeywordKind MethodImplKind, 5564 DeclContext *lexicalDC = 0); 5565 5566 Decl *ActOnPropertyImplDecl(Scope *S, 5567 SourceLocation AtLoc, 5568 SourceLocation PropertyLoc, 5569 bool ImplKind, 5570 IdentifierInfo *PropertyId, 5571 IdentifierInfo *PropertyIvar, 5572 SourceLocation PropertyIvarLoc); 5573 5574 enum ObjCSpecialMethodKind { 5575 OSMK_None, 5576 OSMK_Alloc, 5577 OSMK_New, 5578 OSMK_Copy, 5579 OSMK_RetainingInit, 5580 OSMK_NonRetainingInit 5581 }; 5582 5583 struct ObjCArgInfo { 5584 IdentifierInfo *Name; 5585 SourceLocation NameLoc; 5586 // The Type is null if no type was specified, and the DeclSpec is invalid 5587 // in this case. 5588 ParsedType Type; 5589 ObjCDeclSpec DeclSpec; 5590 5591 /// ArgAttrs - Attribute list for this argument. 5592 AttributeList *ArgAttrs; 5593 }; 5594 5595 Decl *ActOnMethodDeclaration( 5596 Scope *S, 5597 SourceLocation BeginLoc, // location of the + or -. 5598 SourceLocation EndLoc, // location of the ; or {. 5599 tok::TokenKind MethodType, 5600 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5601 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5602 // optional arguments. The number of types/arguments is obtained 5603 // from the Sel.getNumArgs(). 5604 ObjCArgInfo *ArgInfo, 5605 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5606 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5607 bool isVariadic, bool MethodDefinition); 5608 5609 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5610 // Will search "local" class/category implementations for a method decl. 5611 // Will also search in class's root looking for instance method. 5612 // Returns 0 if no method is found. 5613 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5614 ObjCInterfaceDecl *CDecl); 5615 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5616 ObjCInterfaceDecl *ClassDecl); 5617 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5618 const ObjCObjectPointerType *OPT, 5619 bool IsInstance); 5620 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5621 bool IsInstance); 5622 5623 bool inferObjCARCLifetime(ValueDecl *decl); 5624 5625 ExprResult 5626 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5627 Expr *BaseExpr, 5628 SourceLocation OpLoc, 5629 DeclarationName MemberName, 5630 SourceLocation MemberLoc, 5631 SourceLocation SuperLoc, QualType SuperType, 5632 bool Super); 5633 5634 ExprResult 5635 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5636 IdentifierInfo &propertyName, 5637 SourceLocation receiverNameLoc, 5638 SourceLocation propertyNameLoc); 5639 5640 ObjCMethodDecl *tryCaptureObjCSelf(SourceLocation Loc); 5641 5642 /// \brief Describes the kind of message expression indicated by a message 5643 /// send that starts with an identifier. 5644 enum ObjCMessageKind { 5645 /// \brief The message is sent to 'super'. 5646 ObjCSuperMessage, 5647 /// \brief The message is an instance message. 5648 ObjCInstanceMessage, 5649 /// \brief The message is a class message, and the identifier is a type 5650 /// name. 5651 ObjCClassMessage 5652 }; 5653 5654 ObjCMessageKind getObjCMessageKind(Scope *S, 5655 IdentifierInfo *Name, 5656 SourceLocation NameLoc, 5657 bool IsSuper, 5658 bool HasTrailingDot, 5659 ParsedType &ReceiverType); 5660 5661 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5662 Selector Sel, 5663 SourceLocation LBracLoc, 5664 ArrayRef<SourceLocation> SelectorLocs, 5665 SourceLocation RBracLoc, 5666 MultiExprArg Args); 5667 5668 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5669 QualType ReceiverType, 5670 SourceLocation SuperLoc, 5671 Selector Sel, 5672 ObjCMethodDecl *Method, 5673 SourceLocation LBracLoc, 5674 ArrayRef<SourceLocation> SelectorLocs, 5675 SourceLocation RBracLoc, 5676 MultiExprArg Args, 5677 bool isImplicit = false); 5678 5679 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5680 bool isSuperReceiver, 5681 SourceLocation Loc, 5682 Selector Sel, 5683 ObjCMethodDecl *Method, 5684 MultiExprArg Args); 5685 5686 ExprResult ActOnClassMessage(Scope *S, 5687 ParsedType Receiver, 5688 Selector Sel, 5689 SourceLocation LBracLoc, 5690 ArrayRef<SourceLocation> SelectorLocs, 5691 SourceLocation RBracLoc, 5692 MultiExprArg Args); 5693 5694 ExprResult BuildInstanceMessage(Expr *Receiver, 5695 QualType ReceiverType, 5696 SourceLocation SuperLoc, 5697 Selector Sel, 5698 ObjCMethodDecl *Method, 5699 SourceLocation LBracLoc, 5700 ArrayRef<SourceLocation> SelectorLocs, 5701 SourceLocation RBracLoc, 5702 MultiExprArg Args, 5703 bool isImplicit = false); 5704 5705 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5706 QualType ReceiverType, 5707 SourceLocation Loc, 5708 Selector Sel, 5709 ObjCMethodDecl *Method, 5710 MultiExprArg Args); 5711 5712 ExprResult ActOnInstanceMessage(Scope *S, 5713 Expr *Receiver, 5714 Selector Sel, 5715 SourceLocation LBracLoc, 5716 ArrayRef<SourceLocation> SelectorLocs, 5717 SourceLocation RBracLoc, 5718 MultiExprArg Args); 5719 5720 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5721 ObjCBridgeCastKind Kind, 5722 SourceLocation BridgeKeywordLoc, 5723 TypeSourceInfo *TSInfo, 5724 Expr *SubExpr); 5725 5726 ExprResult ActOnObjCBridgedCast(Scope *S, 5727 SourceLocation LParenLoc, 5728 ObjCBridgeCastKind Kind, 5729 SourceLocation BridgeKeywordLoc, 5730 ParsedType Type, 5731 SourceLocation RParenLoc, 5732 Expr *SubExpr); 5733 5734 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5735 5736 /// \brief Check whether the given new method is a valid override of the 5737 /// given overridden method, and set any properties that should be inherited. 5738 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5739 const ObjCMethodDecl *Overridden, 5740 bool IsImplementation); 5741 5742 /// \brief Check whether the given method overrides any methods in its class, 5743 /// calling \c CheckObjCMethodOverride for each overridden method. 5744 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5745 5746 enum PragmaOptionsAlignKind { 5747 POAK_Native, // #pragma options align=native 5748 POAK_Natural, // #pragma options align=natural 5749 POAK_Packed, // #pragma options align=packed 5750 POAK_Power, // #pragma options align=power 5751 POAK_Mac68k, // #pragma options align=mac68k 5752 POAK_Reset // #pragma options align=reset 5753 }; 5754 5755 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5756 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5757 SourceLocation PragmaLoc, 5758 SourceLocation KindLoc); 5759 5760 enum PragmaPackKind { 5761 PPK_Default, // #pragma pack([n]) 5762 PPK_Show, // #pragma pack(show), only supported by MSVC. 5763 PPK_Push, // #pragma pack(push, [identifier], [n]) 5764 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5765 }; 5766 5767 enum PragmaMSStructKind { 5768 PMSST_OFF, // #pragms ms_struct off 5769 PMSST_ON // #pragms ms_struct on 5770 }; 5771 5772 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5773 void ActOnPragmaPack(PragmaPackKind Kind, 5774 IdentifierInfo *Name, 5775 Expr *Alignment, 5776 SourceLocation PragmaLoc, 5777 SourceLocation LParenLoc, 5778 SourceLocation RParenLoc); 5779 5780 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5781 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5782 5783 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5784 void ActOnPragmaUnused(const Token &Identifier, 5785 Scope *curScope, 5786 SourceLocation PragmaLoc); 5787 5788 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5789 void ActOnPragmaVisibility(const IdentifierInfo* VisType, 5790 SourceLocation PragmaLoc); 5791 5792 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5793 SourceLocation Loc); 5794 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5795 5796 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5797 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5798 SourceLocation PragmaLoc, 5799 SourceLocation WeakNameLoc); 5800 5801 /// ActOnPragmaRedefineExtname - Called on well formed 5802 /// #pragma redefine_extname oldname newname. 5803 void ActOnPragmaRedefineExtname(IdentifierInfo* WeakName, 5804 IdentifierInfo* AliasName, 5805 SourceLocation PragmaLoc, 5806 SourceLocation WeakNameLoc, 5807 SourceLocation AliasNameLoc); 5808 5809 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5810 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5811 IdentifierInfo* AliasName, 5812 SourceLocation PragmaLoc, 5813 SourceLocation WeakNameLoc, 5814 SourceLocation AliasNameLoc); 5815 5816 /// ActOnPragmaFPContract - Called on well formed 5817 /// #pragma {STDC,OPENCL} FP_CONTRACT 5818 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5819 5820 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5821 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5822 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5823 5824 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5825 void AddMsStructLayoutForRecord(RecordDecl *RD); 5826 5827 /// FreePackedContext - Deallocate and null out PackContext. 5828 void FreePackedContext(); 5829 5830 /// PushNamespaceVisibilityAttr - Note that we've entered a 5831 /// namespace with a visibility attribute. 5832 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr, 5833 SourceLocation Loc); 5834 5835 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5836 /// add an appropriate visibility attribute. 5837 void AddPushedVisibilityAttribute(Decl *RD); 5838 5839 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5840 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5841 void PopPragmaVisibility(bool IsNamespaceEnd, SourceLocation EndLoc); 5842 5843 /// FreeVisContext - Deallocate and null out VisContext. 5844 void FreeVisContext(); 5845 5846 /// AddCFAuditedAttribute - Check whether we're currently within 5847 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5848 /// the appropriate attribute. 5849 void AddCFAuditedAttribute(Decl *D); 5850 5851 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5852 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5853 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5854 5855 /// \brief The kind of conversion being performed. 5856 enum CheckedConversionKind { 5857 /// \brief An implicit conversion. 5858 CCK_ImplicitConversion, 5859 /// \brief A C-style cast. 5860 CCK_CStyleCast, 5861 /// \brief A functional-style cast. 5862 CCK_FunctionalCast, 5863 /// \brief A cast other than a C-style cast. 5864 CCK_OtherCast 5865 }; 5866 5867 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5868 /// cast. If there is already an implicit cast, merge into the existing one. 5869 /// If isLvalue, the result of the cast is an lvalue. 5870 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5871 ExprValueKind VK = VK_RValue, 5872 const CXXCastPath *BasePath = 0, 5873 CheckedConversionKind CCK 5874 = CCK_ImplicitConversion); 5875 5876 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5877 /// to the conversion from scalar type ScalarTy to the Boolean type. 5878 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5879 5880 /// IgnoredValueConversions - Given that an expression's result is 5881 /// syntactically ignored, perform any conversions that are 5882 /// required. 5883 ExprResult IgnoredValueConversions(Expr *E); 5884 5885 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5886 // functions and arrays to their respective pointers (C99 6.3.2.1). 5887 ExprResult UsualUnaryConversions(Expr *E); 5888 5889 // DefaultFunctionArrayConversion - converts functions and arrays 5890 // to their respective pointers (C99 6.3.2.1). 5891 ExprResult DefaultFunctionArrayConversion(Expr *E); 5892 5893 // DefaultFunctionArrayLvalueConversion - converts functions and 5894 // arrays to their respective pointers and performs the 5895 // lvalue-to-rvalue conversion. 5896 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5897 5898 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5899 // the operand. This is DefaultFunctionArrayLvalueConversion, 5900 // except that it assumes the operand isn't of function or array 5901 // type. 5902 ExprResult DefaultLvalueConversion(Expr *E); 5903 5904 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5905 // do not have a prototype. Integer promotions are performed on each 5906 // argument, and arguments that have type float are promoted to double. 5907 ExprResult DefaultArgumentPromotion(Expr *E); 5908 5909 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5910 enum VariadicCallType { 5911 VariadicFunction, 5912 VariadicBlock, 5913 VariadicMethod, 5914 VariadicConstructor, 5915 VariadicDoesNotApply 5916 }; 5917 5918 /// GatherArgumentsForCall - Collector argument expressions for various 5919 /// form of call prototypes. 5920 bool GatherArgumentsForCall(SourceLocation CallLoc, 5921 FunctionDecl *FDecl, 5922 const FunctionProtoType *Proto, 5923 unsigned FirstProtoArg, 5924 Expr **Args, unsigned NumArgs, 5925 SmallVector<Expr *, 8> &AllArgs, 5926 VariadicCallType CallType = VariadicDoesNotApply, 5927 bool AllowExplicit = false); 5928 5929 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5930 // will warn if the resulting type is not a POD type. 5931 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5932 FunctionDecl *FDecl); 5933 5934 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5935 // operands and then handles various conversions that are common to binary 5936 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5937 // routine returns the first non-arithmetic type found. The client is 5938 // responsible for emitting appropriate error diagnostics. 5939 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5940 bool IsCompAssign = false); 5941 5942 /// AssignConvertType - All of the 'assignment' semantic checks return this 5943 /// enum to indicate whether the assignment was allowed. These checks are 5944 /// done for simple assignments, as well as initialization, return from 5945 /// function, argument passing, etc. The query is phrased in terms of a 5946 /// source and destination type. 5947 enum AssignConvertType { 5948 /// Compatible - the types are compatible according to the standard. 5949 Compatible, 5950 5951 /// PointerToInt - The assignment converts a pointer to an int, which we 5952 /// accept as an extension. 5953 PointerToInt, 5954 5955 /// IntToPointer - The assignment converts an int to a pointer, which we 5956 /// accept as an extension. 5957 IntToPointer, 5958 5959 /// FunctionVoidPointer - The assignment is between a function pointer and 5960 /// void*, which the standard doesn't allow, but we accept as an extension. 5961 FunctionVoidPointer, 5962 5963 /// IncompatiblePointer - The assignment is between two pointers types that 5964 /// are not compatible, but we accept them as an extension. 5965 IncompatiblePointer, 5966 5967 /// IncompatiblePointer - The assignment is between two pointers types which 5968 /// point to integers which have a different sign, but are otherwise 5969 /// identical. This is a subset of the above, but broken out because it's by 5970 /// far the most common case of incompatible pointers. 5971 IncompatiblePointerSign, 5972 5973 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5974 /// c/v/r qualifiers, which we accept as an extension. 5975 CompatiblePointerDiscardsQualifiers, 5976 5977 /// IncompatiblePointerDiscardsQualifiers - The assignment 5978 /// discards qualifiers that we don't permit to be discarded, 5979 /// like address spaces. 5980 IncompatiblePointerDiscardsQualifiers, 5981 5982 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5983 /// nested pointer types, and the qualifiers other than the first two 5984 /// levels differ e.g. char ** -> const char **, but we accept them as an 5985 /// extension. 5986 IncompatibleNestedPointerQualifiers, 5987 5988 /// IncompatibleVectors - The assignment is between two vector types that 5989 /// have the same size, which we accept as an extension. 5990 IncompatibleVectors, 5991 5992 /// IntToBlockPointer - The assignment converts an int to a block 5993 /// pointer. We disallow this. 5994 IntToBlockPointer, 5995 5996 /// IncompatibleBlockPointer - The assignment is between two block 5997 /// pointers types that are not compatible. 5998 IncompatibleBlockPointer, 5999 6000 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 6001 /// id type and something else (that is incompatible with it). For example, 6002 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 6003 IncompatibleObjCQualifiedId, 6004 6005 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 6006 /// object with __weak qualifier. 6007 IncompatibleObjCWeakRef, 6008 6009 /// Incompatible - We reject this conversion outright, it is invalid to 6010 /// represent it in the AST. 6011 Incompatible 6012 }; 6013 6014 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 6015 /// assignment conversion type specified by ConvTy. This returns true if the 6016 /// conversion was invalid or false if the conversion was accepted. 6017 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 6018 SourceLocation Loc, 6019 QualType DstType, QualType SrcType, 6020 Expr *SrcExpr, AssignmentAction Action, 6021 bool *Complained = 0); 6022 6023 /// CheckAssignmentConstraints - Perform type checking for assignment, 6024 /// argument passing, variable initialization, and function return values. 6025 /// C99 6.5.16. 6026 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 6027 QualType LHSType, 6028 QualType RHSType); 6029 6030 /// Check assignment constraints and prepare for a conversion of the 6031 /// RHS to the LHS type. 6032 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 6033 ExprResult &RHS, 6034 CastKind &Kind); 6035 6036 // CheckSingleAssignmentConstraints - Currently used by 6037 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 6038 // this routine performs the default function/array converions. 6039 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 6040 ExprResult &RHS, 6041 bool Diagnose = true); 6042 6043 // \brief If the lhs type is a transparent union, check whether we 6044 // can initialize the transparent union with the given expression. 6045 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 6046 ExprResult &RHS); 6047 6048 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 6049 6050 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 6051 6052 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6053 AssignmentAction Action, 6054 bool AllowExplicit = false); 6055 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6056 AssignmentAction Action, 6057 bool AllowExplicit, 6058 ImplicitConversionSequence& ICS); 6059 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6060 const ImplicitConversionSequence& ICS, 6061 AssignmentAction Action, 6062 CheckedConversionKind CCK 6063 = CCK_ImplicitConversion); 6064 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 6065 const StandardConversionSequence& SCS, 6066 AssignmentAction Action, 6067 CheckedConversionKind CCK); 6068 6069 /// the following "Check" methods will return a valid/converted QualType 6070 /// or a null QualType (indicating an error diagnostic was issued). 6071 6072 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 6073 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 6074 ExprResult &RHS); 6075 QualType CheckPointerToMemberOperands( // C++ 5.5 6076 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 6077 SourceLocation OpLoc, bool isIndirect); 6078 QualType CheckMultiplyDivideOperands( // C99 6.5.5 6079 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 6080 bool IsDivide); 6081 QualType CheckRemainderOperands( // C99 6.5.5 6082 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6083 bool IsCompAssign = false); 6084 QualType CheckAdditionOperands( // C99 6.5.6 6085 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6086 QualType* CompLHSTy = 0); 6087 QualType CheckSubtractionOperands( // C99 6.5.6 6088 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6089 QualType* CompLHSTy = 0); 6090 QualType CheckShiftOperands( // C99 6.5.7 6091 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 6092 bool IsCompAssign = false); 6093 QualType CheckCompareOperands( // C99 6.5.8/9 6094 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 6095 bool isRelational); 6096 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 6097 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 6098 bool IsCompAssign = false); 6099 QualType CheckLogicalOperands( // C99 6.5.[13,14] 6100 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 6101 // CheckAssignmentOperands is used for both simple and compound assignment. 6102 // For simple assignment, pass both expressions and a null converted type. 6103 // For compound assignment, pass both expressions and the converted type. 6104 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 6105 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 6106 6107 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 6108 UnaryOperatorKind Opcode, Expr *Op); 6109 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 6110 BinaryOperatorKind Opcode, 6111 Expr *LHS, Expr *RHS); 6112 ExprResult checkPseudoObjectRValue(Expr *E); 6113 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 6114 6115 QualType CheckConditionalOperands( // C99 6.5.15 6116 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 6117 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 6118 QualType CXXCheckConditionalOperands( // C++ 5.16 6119 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 6120 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 6121 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 6122 bool *NonStandardCompositeType = 0); 6123 QualType FindCompositePointerType(SourceLocation Loc, 6124 ExprResult &E1, ExprResult &E2, 6125 bool *NonStandardCompositeType = 0) { 6126 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 6127 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 6128 NonStandardCompositeType); 6129 E1 = Owned(E1Tmp); 6130 E2 = Owned(E2Tmp); 6131 return Composite; 6132 } 6133 6134 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 6135 SourceLocation QuestionLoc); 6136 6137 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 6138 SourceLocation QuestionLoc); 6139 6140 /// type checking for vector binary operators. 6141 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 6142 SourceLocation Loc, bool IsCompAssign); 6143 QualType GetSignedVectorType(QualType V); 6144 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 6145 SourceLocation Loc, bool isRelational); 6146 QualType CheckVectorLogicalOperands(ExprResult &LHS, ExprResult &RHS, 6147 SourceLocation Loc); 6148 6149 /// type checking declaration initializers (C99 6.7.8) 6150 bool CheckForConstantInitializer(Expr *e, QualType t); 6151 6152 // type checking C++ declaration initializers (C++ [dcl.init]). 6153 6154 /// ReferenceCompareResult - Expresses the result of comparing two 6155 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 6156 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 6157 enum ReferenceCompareResult { 6158 /// Ref_Incompatible - The two types are incompatible, so direct 6159 /// reference binding is not possible. 6160 Ref_Incompatible = 0, 6161 /// Ref_Related - The two types are reference-related, which means 6162 /// that their unqualified forms (T1 and T2) are either the same 6163 /// or T1 is a base class of T2. 6164 Ref_Related, 6165 /// Ref_Compatible_With_Added_Qualification - The two types are 6166 /// reference-compatible with added qualification, meaning that 6167 /// they are reference-compatible and the qualifiers on T1 (cv1) 6168 /// are greater than the qualifiers on T2 (cv2). 6169 Ref_Compatible_With_Added_Qualification, 6170 /// Ref_Compatible - The two types are reference-compatible and 6171 /// have equivalent qualifiers (cv1 == cv2). 6172 Ref_Compatible 6173 }; 6174 6175 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 6176 QualType T1, QualType T2, 6177 bool &DerivedToBase, 6178 bool &ObjCConversion, 6179 bool &ObjCLifetimeConversion); 6180 6181 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6182 Expr *CastExpr, CastKind &CastKind, 6183 ExprValueKind &VK, CXXCastPath &Path); 6184 6185 /// \brief Force an expression with unknown-type to an expression of the 6186 /// given type. 6187 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6188 6189 // CheckVectorCast - check type constraints for vectors. 6190 // Since vectors are an extension, there are no C standard reference for this. 6191 // We allow casting between vectors and integer datatypes of the same size. 6192 // returns true if the cast is invalid 6193 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6194 CastKind &Kind); 6195 6196 // CheckExtVectorCast - check type constraints for extended vectors. 6197 // Since vectors are an extension, there are no C standard reference for this. 6198 // We allow casting between vectors and integer datatypes of the same size, 6199 // or vectors and the element type of that vector. 6200 // returns the cast expr 6201 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6202 CastKind &Kind); 6203 6204 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6205 SourceLocation LParenLoc, 6206 Expr *CastExpr, 6207 SourceLocation RParenLoc); 6208 6209 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6210 6211 /// \brief Checks for invalid conversions and casts between 6212 /// retainable pointers and other pointer kinds. 6213 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6214 QualType castType, Expr *&op, 6215 CheckedConversionKind CCK); 6216 6217 Expr *stripARCUnbridgedCast(Expr *e); 6218 void diagnoseARCUnbridgedCast(Expr *e); 6219 6220 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6221 QualType ExprType); 6222 6223 /// checkRetainCycles - Check whether an Objective-C message send 6224 /// might create an obvious retain cycle. 6225 void checkRetainCycles(ObjCMessageExpr *msg); 6226 void checkRetainCycles(Expr *receiver, Expr *argument); 6227 6228 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6229 /// to weak/__unsafe_unretained type. 6230 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6231 6232 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6233 /// to weak/__unsafe_unretained expression. 6234 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6235 6236 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6237 /// \param Method - May be null. 6238 /// \param [out] ReturnType - The return type of the send. 6239 /// \return true iff there were any incompatible types. 6240 bool CheckMessageArgumentTypes(QualType ReceiverType, 6241 Expr **Args, unsigned NumArgs, Selector Sel, 6242 ObjCMethodDecl *Method, bool isClassMessage, 6243 bool isSuperMessage, 6244 SourceLocation lbrac, SourceLocation rbrac, 6245 QualType &ReturnType, ExprValueKind &VK); 6246 6247 /// \brief Determine the result of a message send expression based on 6248 /// the type of the receiver, the method expected to receive the message, 6249 /// and the form of the message send. 6250 QualType getMessageSendResultType(QualType ReceiverType, 6251 ObjCMethodDecl *Method, 6252 bool isClassMessage, bool isSuperMessage); 6253 6254 /// \brief If the given expression involves a message send to a method 6255 /// with a related result type, emit a note describing what happened. 6256 void EmitRelatedResultTypeNote(const Expr *E); 6257 6258 /// CheckBooleanCondition - Diagnose problems involving the use of 6259 /// the given expression as a boolean condition (e.g. in an if 6260 /// statement). Also performs the standard function and array 6261 /// decays, possibly changing the input variable. 6262 /// 6263 /// \param Loc - A location associated with the condition, e.g. the 6264 /// 'if' keyword. 6265 /// \return true iff there were any errors 6266 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6267 6268 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6269 Expr *SubExpr); 6270 6271 /// DiagnoseAssignmentAsCondition - Given that an expression is 6272 /// being used as a boolean condition, warn if it's an assignment. 6273 void DiagnoseAssignmentAsCondition(Expr *E); 6274 6275 /// \brief Redundant parentheses over an equality comparison can indicate 6276 /// that the user intended an assignment used as condition. 6277 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6278 6279 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6280 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6281 6282 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6283 /// the specified width and sign. If an overflow occurs, detect it and emit 6284 /// the specified diagnostic. 6285 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6286 unsigned NewWidth, bool NewSign, 6287 SourceLocation Loc, unsigned DiagID); 6288 6289 /// Checks that the Objective-C declaration is declared in the global scope. 6290 /// Emits an error and marks the declaration as invalid if it's not declared 6291 /// in the global scope. 6292 bool CheckObjCDeclScope(Decl *D); 6293 6294 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6295 /// and reports the appropriate diagnostics. Returns false on success. 6296 /// Can optionally return the value of the expression. 6297 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6298 PartialDiagnostic Diag, 6299 bool AllowFold, 6300 PartialDiagnostic FoldDiag); 6301 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result, 6302 PartialDiagnostic Diag, 6303 bool AllowFold = true) { 6304 return VerifyIntegerConstantExpression(E, Result, Diag, AllowFold, 6305 PDiag(0)); 6306 } 6307 ExprResult VerifyIntegerConstantExpression(Expr *E, llvm::APSInt *Result = 0); 6308 6309 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6310 /// the correct width, and that the field type is valid. 6311 /// Returns false on success. 6312 /// Can optionally return whether the bit-field is of width 0 6313 ExprResult VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6314 QualType FieldTy, Expr *BitWidth, 6315 bool *ZeroWidth = 0); 6316 6317 enum CUDAFunctionTarget { 6318 CFT_Device, 6319 CFT_Global, 6320 CFT_Host, 6321 CFT_HostDevice 6322 }; 6323 6324 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6325 6326 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6327 CUDAFunctionTarget CalleeTarget); 6328 6329 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6330 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6331 IdentifyCUDATarget(Callee)); 6332 } 6333 6334 /// \name Code completion 6335 //@{ 6336 /// \brief Describes the context in which code completion occurs. 6337 enum ParserCompletionContext { 6338 /// \brief Code completion occurs at top-level or namespace context. 6339 PCC_Namespace, 6340 /// \brief Code completion occurs within a class, struct, or union. 6341 PCC_Class, 6342 /// \brief Code completion occurs within an Objective-C interface, protocol, 6343 /// or category. 6344 PCC_ObjCInterface, 6345 /// \brief Code completion occurs within an Objective-C implementation or 6346 /// category implementation 6347 PCC_ObjCImplementation, 6348 /// \brief Code completion occurs within the list of instance variables 6349 /// in an Objective-C interface, protocol, category, or implementation. 6350 PCC_ObjCInstanceVariableList, 6351 /// \brief Code completion occurs following one or more template 6352 /// headers. 6353 PCC_Template, 6354 /// \brief Code completion occurs following one or more template 6355 /// headers within a class. 6356 PCC_MemberTemplate, 6357 /// \brief Code completion occurs within an expression. 6358 PCC_Expression, 6359 /// \brief Code completion occurs within a statement, which may 6360 /// also be an expression or a declaration. 6361 PCC_Statement, 6362 /// \brief Code completion occurs at the beginning of the 6363 /// initialization statement (or expression) in a for loop. 6364 PCC_ForInit, 6365 /// \brief Code completion occurs within the condition of an if, 6366 /// while, switch, or for statement. 6367 PCC_Condition, 6368 /// \brief Code completion occurs within the body of a function on a 6369 /// recovery path, where we do not have a specific handle on our position 6370 /// in the grammar. 6371 PCC_RecoveryInFunction, 6372 /// \brief Code completion occurs where only a type is permitted. 6373 PCC_Type, 6374 /// \brief Code completion occurs in a parenthesized expression, which 6375 /// might also be a type cast. 6376 PCC_ParenthesizedExpression, 6377 /// \brief Code completion occurs within a sequence of declaration 6378 /// specifiers within a function, method, or block. 6379 PCC_LocalDeclarationSpecifiers 6380 }; 6381 6382 void CodeCompleteModuleImport(SourceLocation ImportLoc, ModuleIdPath Path); 6383 void CodeCompleteOrdinaryName(Scope *S, 6384 ParserCompletionContext CompletionContext); 6385 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6386 bool AllowNonIdentifiers, 6387 bool AllowNestedNameSpecifiers); 6388 6389 struct CodeCompleteExpressionData; 6390 void CodeCompleteExpression(Scope *S, 6391 const CodeCompleteExpressionData &Data); 6392 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6393 SourceLocation OpLoc, 6394 bool IsArrow); 6395 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6396 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6397 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6398 void CodeCompleteCase(Scope *S); 6399 void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args); 6400 void CodeCompleteInitializer(Scope *S, Decl *D); 6401 void CodeCompleteReturn(Scope *S); 6402 void CodeCompleteAfterIf(Scope *S); 6403 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6404 6405 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6406 bool EnteringContext); 6407 void CodeCompleteUsing(Scope *S); 6408 void CodeCompleteUsingDirective(Scope *S); 6409 void CodeCompleteNamespaceDecl(Scope *S); 6410 void CodeCompleteNamespaceAliasDecl(Scope *S); 6411 void CodeCompleteOperatorName(Scope *S); 6412 void CodeCompleteConstructorInitializer(Decl *Constructor, 6413 CXXCtorInitializer** Initializers, 6414 unsigned NumInitializers); 6415 void CodeCompleteLambdaIntroducer(Scope *S, LambdaIntroducer &Intro, 6416 bool AfterAmpersand); 6417 6418 void CodeCompleteObjCAtDirective(Scope *S); 6419 void CodeCompleteObjCAtVisibility(Scope *S); 6420 void CodeCompleteObjCAtStatement(Scope *S); 6421 void CodeCompleteObjCAtExpression(Scope *S); 6422 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6423 void CodeCompleteObjCPropertyGetter(Scope *S); 6424 void CodeCompleteObjCPropertySetter(Scope *S); 6425 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6426 bool IsParameter); 6427 void CodeCompleteObjCMessageReceiver(Scope *S); 6428 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6429 IdentifierInfo **SelIdents, 6430 unsigned NumSelIdents, 6431 bool AtArgumentExpression); 6432 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6433 IdentifierInfo **SelIdents, 6434 unsigned NumSelIdents, 6435 bool AtArgumentExpression, 6436 bool IsSuper = false); 6437 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6438 IdentifierInfo **SelIdents, 6439 unsigned NumSelIdents, 6440 bool AtArgumentExpression, 6441 ObjCInterfaceDecl *Super = 0); 6442 void CodeCompleteObjCForCollection(Scope *S, 6443 DeclGroupPtrTy IterationVar); 6444 void CodeCompleteObjCSelector(Scope *S, 6445 IdentifierInfo **SelIdents, 6446 unsigned NumSelIdents); 6447 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6448 unsigned NumProtocols); 6449 void CodeCompleteObjCProtocolDecl(Scope *S); 6450 void CodeCompleteObjCInterfaceDecl(Scope *S); 6451 void CodeCompleteObjCSuperclass(Scope *S, 6452 IdentifierInfo *ClassName, 6453 SourceLocation ClassNameLoc); 6454 void CodeCompleteObjCImplementationDecl(Scope *S); 6455 void CodeCompleteObjCInterfaceCategory(Scope *S, 6456 IdentifierInfo *ClassName, 6457 SourceLocation ClassNameLoc); 6458 void CodeCompleteObjCImplementationCategory(Scope *S, 6459 IdentifierInfo *ClassName, 6460 SourceLocation ClassNameLoc); 6461 void CodeCompleteObjCPropertyDefinition(Scope *S); 6462 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6463 IdentifierInfo *PropertyName); 6464 void CodeCompleteObjCMethodDecl(Scope *S, 6465 bool IsInstanceMethod, 6466 ParsedType ReturnType); 6467 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6468 bool IsInstanceMethod, 6469 bool AtParameterName, 6470 ParsedType ReturnType, 6471 IdentifierInfo **SelIdents, 6472 unsigned NumSelIdents); 6473 void CodeCompletePreprocessorDirective(bool InConditional); 6474 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6475 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6476 void CodeCompletePreprocessorExpression(); 6477 void CodeCompletePreprocessorMacroArgument(Scope *S, 6478 IdentifierInfo *Macro, 6479 MacroInfo *MacroInfo, 6480 unsigned Argument); 6481 void CodeCompleteNaturalLanguage(); 6482 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6483 SmallVectorImpl<CodeCompletionResult> &Results); 6484 //@} 6485 6486 //===--------------------------------------------------------------------===// 6487 // Extra semantic analysis beyond the C type system 6488 6489public: 6490 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6491 unsigned ByteNo) const; 6492 6493private: 6494 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6495 const ArraySubscriptExpr *ASE=0, 6496 bool AllowOnePastEnd=true, bool IndexNegated=false); 6497 void CheckArrayAccess(const Expr *E); 6498 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6499 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6500 Expr **Args, unsigned NumArgs); 6501 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6502 6503 bool CheckObjCString(Expr *Arg); 6504 6505 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6506 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6507 6508 bool SemaBuiltinVAStart(CallExpr *TheCall); 6509 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6510 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6511 6512public: 6513 // Used by C++ template instantiation. 6514 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6515 6516private: 6517 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6518 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6519 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6520 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6521 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6522 AtomicExpr::AtomicOp Op); 6523 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6524 llvm::APSInt &Result); 6525 6526 enum FormatStringType { 6527 FST_Scanf, 6528 FST_Printf, 6529 FST_NSString, 6530 FST_Strftime, 6531 FST_Strfmon, 6532 FST_Kprintf, 6533 FST_Unknown 6534 }; 6535 static FormatStringType GetFormatStringType(const FormatAttr *Format); 6536 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6537 bool HasVAListArg, unsigned format_idx, 6538 unsigned firstDataArg, FormatStringType Type, 6539 bool inFunctionCall = true); 6540 6541 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6542 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6543 unsigned format_idx, unsigned firstDataArg, 6544 FormatStringType Type, bool inFunctionCall); 6545 6546 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6547 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6548 unsigned NumArgs, bool IsCXXMember, 6549 SourceLocation Loc, SourceRange Range); 6550 void CheckFormatArguments(Expr **Args, unsigned NumArgs, 6551 bool HasVAListArg, unsigned format_idx, 6552 unsigned firstDataArg, FormatStringType Type, 6553 SourceLocation Loc, SourceRange range); 6554 6555 void CheckNonNullArguments(const NonNullAttr *NonNull, 6556 const Expr * const *ExprArgs, 6557 SourceLocation CallSiteLoc); 6558 6559 void CheckMemaccessArguments(const CallExpr *Call, 6560 unsigned BId, 6561 IdentifierInfo *FnName); 6562 6563 void CheckStrlcpycatArguments(const CallExpr *Call, 6564 IdentifierInfo *FnName); 6565 6566 void CheckStrncatArguments(const CallExpr *Call, 6567 IdentifierInfo *FnName); 6568 6569 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6570 SourceLocation ReturnLoc); 6571 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6572 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6573 6574 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6575 Expr *Init); 6576 6577 /// \brief The parser's current scope. 6578 /// 6579 /// The parser maintains this state here. 6580 Scope *CurScope; 6581 6582protected: 6583 friend class Parser; 6584 friend class InitializationSequence; 6585 friend class ASTReader; 6586 friend class ASTWriter; 6587 6588public: 6589 /// \brief Retrieve the parser's current scope. 6590 /// 6591 /// This routine must only be used when it is certain that semantic analysis 6592 /// and the parser are in precisely the same context, which is not the case 6593 /// when, e.g., we are performing any kind of template instantiation. 6594 /// Therefore, the only safe places to use this scope are in the parser 6595 /// itself and in routines directly invoked from the parser and *never* from 6596 /// template substitution or instantiation. 6597 Scope *getCurScope() const { return CurScope; } 6598 6599 Decl *getObjCDeclContext() const; 6600 6601 DeclContext *getCurLexicalContext() const { 6602 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6603 } 6604 6605 AvailabilityResult getCurContextAvailability() const; 6606}; 6607 6608/// \brief RAII object that enters a new expression evaluation context. 6609class EnterExpressionEvaluationContext { 6610 Sema &Actions; 6611 6612public: 6613 EnterExpressionEvaluationContext(Sema &Actions, 6614 Sema::ExpressionEvaluationContext NewContext, 6615 Decl *LambdaContextDecl = 0, 6616 bool IsDecltype = false) 6617 : Actions(Actions) { 6618 Actions.PushExpressionEvaluationContext(NewContext, LambdaContextDecl, 6619 IsDecltype); 6620 } 6621 6622 ~EnterExpressionEvaluationContext() { 6623 Actions.PopExpressionEvaluationContext(); 6624 } 6625}; 6626 6627} // end namespace clang 6628 6629#endif 6630