Sema.h revision bcdd7d92883d771106e54357245733358eac9672
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/MultiInitializer.h" 26#include "clang/Sema/TypoCorrection.h" 27#include "clang/Sema/Weak.h" 28#include "clang/AST/Expr.h" 29#include "clang/AST/DeclarationName.h" 30#include "clang/AST/ExternalASTSource.h" 31#include "clang/AST/TypeLoc.h" 32#include "clang/Lex/ModuleLoader.h" 33#include "clang/Basic/Specifiers.h" 34#include "clang/Basic/TemplateKinds.h" 35#include "clang/Basic/TypeTraits.h" 36#include "clang/Basic/ExpressionTraits.h" 37#include "llvm/ADT/ArrayRef.h" 38#include "llvm/ADT/OwningPtr.h" 39#include "llvm/ADT/SmallPtrSet.h" 40#include "llvm/ADT/SmallVector.h" 41#include <deque> 42#include <string> 43 44namespace llvm { 45 class APSInt; 46 template <typename ValueT> struct DenseMapInfo; 47 template <typename ValueT, typename ValueInfoT> class DenseSet; 48} 49 50namespace clang { 51 class ADLResult; 52 class ASTConsumer; 53 class ASTContext; 54 class ASTMutationListener; 55 class ASTReader; 56 class ASTWriter; 57 class ArrayType; 58 class AttributeList; 59 class BlockDecl; 60 class CXXBasePath; 61 class CXXBasePaths; 62 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 63 class CXXConstructorDecl; 64 class CXXConversionDecl; 65 class CXXDestructorDecl; 66 class CXXFieldCollector; 67 class CXXMemberCallExpr; 68 class CXXMethodDecl; 69 class CXXScopeSpec; 70 class CXXTemporary; 71 class CXXTryStmt; 72 class CallExpr; 73 class ClassTemplateDecl; 74 class ClassTemplatePartialSpecializationDecl; 75 class ClassTemplateSpecializationDecl; 76 class CodeCompleteConsumer; 77 class CodeCompletionAllocator; 78 class CodeCompletionResult; 79 class Decl; 80 class DeclAccessPair; 81 class DeclContext; 82 class DeclRefExpr; 83 class DeclaratorDecl; 84 class DeducedTemplateArgument; 85 class DependentDiagnostic; 86 class DesignatedInitExpr; 87 class Designation; 88 class EnumConstantDecl; 89 class Expr; 90 class ExtVectorType; 91 class ExternalSemaSource; 92 class FormatAttr; 93 class FriendDecl; 94 class FunctionDecl; 95 class FunctionProtoType; 96 class FunctionTemplateDecl; 97 class ImplicitConversionSequence; 98 class InitListExpr; 99 class InitializationKind; 100 class InitializationSequence; 101 class InitializedEntity; 102 class IntegerLiteral; 103 class LabelStmt; 104 class LangOptions; 105 class LocalInstantiationScope; 106 class LookupResult; 107 class MacroInfo; 108 class MultiLevelTemplateArgumentList; 109 class NamedDecl; 110 class NonNullAttr; 111 class ObjCCategoryDecl; 112 class ObjCCategoryImplDecl; 113 class ObjCCompatibleAliasDecl; 114 class ObjCContainerDecl; 115 class ObjCImplDecl; 116 class ObjCImplementationDecl; 117 class ObjCInterfaceDecl; 118 class ObjCIvarDecl; 119 template <class T> class ObjCList; 120 class ObjCMessageExpr; 121 class ObjCMethodDecl; 122 class ObjCPropertyDecl; 123 class ObjCProtocolDecl; 124 class OverloadCandidateSet; 125 class OverloadExpr; 126 class ParenListExpr; 127 class ParmVarDecl; 128 class Preprocessor; 129 class PseudoDestructorTypeStorage; 130 class PseudoObjectExpr; 131 class QualType; 132 class StandardConversionSequence; 133 class Stmt; 134 class StringLiteral; 135 class SwitchStmt; 136 class TargetAttributesSema; 137 class TemplateArgument; 138 class TemplateArgumentList; 139 class TemplateArgumentLoc; 140 class TemplateDecl; 141 class TemplateParameterList; 142 class TemplatePartialOrderingContext; 143 class TemplateTemplateParmDecl; 144 class Token; 145 class TypeAliasDecl; 146 class TypedefDecl; 147 class TypedefNameDecl; 148 class TypeLoc; 149 class UnqualifiedId; 150 class UnresolvedLookupExpr; 151 class UnresolvedMemberExpr; 152 class UnresolvedSetImpl; 153 class UnresolvedSetIterator; 154 class UsingDecl; 155 class UsingShadowDecl; 156 class ValueDecl; 157 class VarDecl; 158 class VisibilityAttr; 159 class VisibleDeclConsumer; 160 class IndirectFieldDecl; 161 162namespace sema { 163 class AccessedEntity; 164 class BlockScopeInfo; 165 class DelayedDiagnostic; 166 class FunctionScopeInfo; 167 class LambdaScopeInfo; 168 class PossiblyUnreachableDiag; 169 class TemplateDeductionInfo; 170} 171 172// FIXME: No way to easily map from TemplateTypeParmTypes to 173// TemplateTypeParmDecls, so we have this horrible PointerUnion. 174typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 175 SourceLocation> UnexpandedParameterPack; 176 177/// Sema - This implements semantic analysis and AST building for C. 178class Sema { 179 Sema(const Sema&); // DO NOT IMPLEMENT 180 void operator=(const Sema&); // DO NOT IMPLEMENT 181 mutable const TargetAttributesSema* TheTargetAttributesSema; 182public: 183 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 184 typedef OpaquePtr<TemplateName> TemplateTy; 185 typedef OpaquePtr<QualType> TypeTy; 186 187 OpenCLOptions OpenCLFeatures; 188 FPOptions FPFeatures; 189 190 const LangOptions &LangOpts; 191 Preprocessor &PP; 192 ASTContext &Context; 193 ASTConsumer &Consumer; 194 DiagnosticsEngine &Diags; 195 SourceManager &SourceMgr; 196 197 /// \brief Flag indicating whether or not to collect detailed statistics. 198 bool CollectStats; 199 200 /// \brief Source of additional semantic information. 201 ExternalSemaSource *ExternalSource; 202 203 /// \brief Code-completion consumer. 204 CodeCompleteConsumer *CodeCompleter; 205 206 /// CurContext - This is the current declaration context of parsing. 207 DeclContext *CurContext; 208 209 /// \brief Generally null except when we temporarily switch decl contexts, 210 /// like in \see ActOnObjCTemporaryExitContainerContext. 211 DeclContext *OriginalLexicalContext; 212 213 /// VAListTagName - The declaration name corresponding to __va_list_tag. 214 /// This is used as part of a hack to omit that class from ADL results. 215 DeclarationName VAListTagName; 216 217 /// PackContext - Manages the stack for #pragma pack. An alignment 218 /// of 0 indicates default alignment. 219 void *PackContext; // Really a "PragmaPackStack*" 220 221 bool MSStructPragmaOn; // True when #pragma ms_struct on 222 223 /// VisContext - Manages the stack for #pragma GCC visibility. 224 void *VisContext; // Really a "PragmaVisStack*" 225 226 /// ExprNeedsCleanups - True if the current evaluation context 227 /// requires cleanups to be run at its conclusion. 228 bool ExprNeedsCleanups; 229 230 /// ExprCleanupObjects - This is the stack of objects requiring 231 /// cleanup that are created by the current full expression. The 232 /// element type here is ExprWithCleanups::Object. 233 SmallVector<BlockDecl*, 8> ExprCleanupObjects; 234 235 /// \brief Stack containing information about each of the nested 236 /// function, block, and method scopes that are currently active. 237 /// 238 /// This array is never empty. Clients should ignore the first 239 /// element, which is used to cache a single FunctionScopeInfo 240 /// that's used to parse every top-level function. 241 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 242 243 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 244 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 245 ExtVectorDeclsType; 246 247 /// ExtVectorDecls - This is a list all the extended vector types. This allows 248 /// us to associate a raw vector type with one of the ext_vector type names. 249 /// This is only necessary for issuing pretty diagnostics. 250 ExtVectorDeclsType ExtVectorDecls; 251 252 /// \brief The set of types for which we have already complained about the 253 /// definitions being hidden. 254 /// 255 /// This set is used to suppress redundant diagnostics. 256 llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions; 257 258 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 259 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 260 261 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 262 263 /// PureVirtualClassDiagSet - a set of class declarations which we have 264 /// emitted a list of pure virtual functions. Used to prevent emitting the 265 /// same list more than once. 266 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 267 268 /// ParsingInitForAutoVars - a set of declarations with auto types for which 269 /// we are currently parsing the initializer. 270 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 271 272 /// \brief A mapping from external names to the most recent 273 /// locally-scoped external declaration with that name. 274 /// 275 /// This map contains external declarations introduced in local 276 /// scoped, e.g., 277 /// 278 /// \code 279 /// void f() { 280 /// void foo(int, int); 281 /// } 282 /// \endcode 283 /// 284 /// Here, the name "foo" will be associated with the declaration on 285 /// "foo" within f. This name is not visible outside of 286 /// "f". However, we still find it in two cases: 287 /// 288 /// - If we are declaring another external with the name "foo", we 289 /// can find "foo" as a previous declaration, so that the types 290 /// of this external declaration can be checked for 291 /// compatibility. 292 /// 293 /// - If we would implicitly declare "foo" (e.g., due to a call to 294 /// "foo" in C when no prototype or definition is visible), then 295 /// we find this declaration of "foo" and complain that it is 296 /// not visible. 297 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 298 299 /// \brief Look for a locally scoped external declaration by the given name. 300 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 301 findLocallyScopedExternalDecl(DeclarationName Name); 302 303 typedef LazyVector<VarDecl *, ExternalSemaSource, 304 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 305 TentativeDefinitionsType; 306 307 /// \brief All the tentative definitions encountered in the TU. 308 TentativeDefinitionsType TentativeDefinitions; 309 310 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 311 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 312 UnusedFileScopedDeclsType; 313 314 /// \brief The set of file scoped decls seen so far that have not been used 315 /// and must warn if not used. Only contains the first declaration. 316 UnusedFileScopedDeclsType UnusedFileScopedDecls; 317 318 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 319 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 320 DelegatingCtorDeclsType; 321 322 /// \brief All the delegating constructors seen so far in the file, used for 323 /// cycle detection at the end of the TU. 324 DelegatingCtorDeclsType DelegatingCtorDecls; 325 326 /// \brief All the overriding destructors seen during a class definition 327 /// (there could be multiple due to nested classes) that had their exception 328 /// spec checks delayed, plus the overridden destructor. 329 SmallVector<std::pair<const CXXDestructorDecl*, 330 const CXXDestructorDecl*>, 2> 331 DelayedDestructorExceptionSpecChecks; 332 333 /// \brief Callback to the parser to parse templated functions when needed. 334 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 335 LateTemplateParserCB *LateTemplateParser; 336 void *OpaqueParser; 337 338 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 339 LateTemplateParser = LTP; 340 OpaqueParser = P; 341 } 342 343 class DelayedDiagnostics; 344 345 class ParsingDeclState { 346 unsigned SavedStackSize; 347 friend class Sema::DelayedDiagnostics; 348 }; 349 350 class ProcessingContextState { 351 unsigned SavedParsingDepth; 352 unsigned SavedActiveStackBase; 353 friend class Sema::DelayedDiagnostics; 354 }; 355 356 /// A class which encapsulates the logic for delaying diagnostics 357 /// during parsing and other processing. 358 class DelayedDiagnostics { 359 /// \brief The stack of diagnostics that were delayed due to being 360 /// produced during the parsing of a declaration. 361 sema::DelayedDiagnostic *Stack; 362 363 /// \brief The number of objects on the delayed-diagnostics stack. 364 unsigned StackSize; 365 366 /// \brief The current capacity of the delayed-diagnostics stack. 367 unsigned StackCapacity; 368 369 /// \brief The index of the first "active" delayed diagnostic in 370 /// the stack. When parsing class definitions, we ignore active 371 /// delayed diagnostics from the surrounding context. 372 unsigned ActiveStackBase; 373 374 /// \brief The depth of the declarations we're currently parsing. 375 /// This gets saved and reset whenever we enter a class definition. 376 unsigned ParsingDepth; 377 378 public: 379 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 380 ActiveStackBase(0), ParsingDepth(0) {} 381 382 ~DelayedDiagnostics() { 383 delete[] reinterpret_cast<char*>(Stack); 384 } 385 386 /// Adds a delayed diagnostic. 387 void add(const sema::DelayedDiagnostic &diag); 388 389 /// Determines whether diagnostics should be delayed. 390 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 391 392 /// Observe that we've started parsing a declaration. Access and 393 /// deprecation diagnostics will be delayed; when the declaration 394 /// is completed, all active delayed diagnostics will be evaluated 395 /// in its context, and then active diagnostics stack will be 396 /// popped down to the saved depth. 397 ParsingDeclState pushParsingDecl() { 398 ParsingDepth++; 399 400 ParsingDeclState state; 401 state.SavedStackSize = StackSize; 402 return state; 403 } 404 405 /// Observe that we're completed parsing a declaration. 406 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 407 408 /// Observe that we've started processing a different context, the 409 /// contents of which are semantically separate from the 410 /// declarations it may lexically appear in. This sets aside the 411 /// current stack of active diagnostics and starts afresh. 412 ProcessingContextState pushContext() { 413 assert(StackSize >= ActiveStackBase); 414 415 ProcessingContextState state; 416 state.SavedParsingDepth = ParsingDepth; 417 state.SavedActiveStackBase = ActiveStackBase; 418 419 ActiveStackBase = StackSize; 420 ParsingDepth = 0; 421 422 return state; 423 } 424 425 /// Observe that we've stopped processing a context. This 426 /// restores the previous stack of active diagnostics. 427 void popContext(ProcessingContextState state) { 428 assert(ActiveStackBase == StackSize); 429 assert(ParsingDepth == 0); 430 ActiveStackBase = state.SavedActiveStackBase; 431 ParsingDepth = state.SavedParsingDepth; 432 } 433 } DelayedDiagnostics; 434 435 /// A RAII object to temporarily push a declaration context. 436 class ContextRAII { 437 private: 438 Sema &S; 439 DeclContext *SavedContext; 440 ProcessingContextState SavedContextState; 441 442 public: 443 ContextRAII(Sema &S, DeclContext *ContextToPush) 444 : S(S), SavedContext(S.CurContext), 445 SavedContextState(S.DelayedDiagnostics.pushContext()) 446 { 447 assert(ContextToPush && "pushing null context"); 448 S.CurContext = ContextToPush; 449 } 450 451 void pop() { 452 if (!SavedContext) return; 453 S.CurContext = SavedContext; 454 S.DelayedDiagnostics.popContext(SavedContextState); 455 SavedContext = 0; 456 } 457 458 ~ContextRAII() { 459 pop(); 460 } 461 }; 462 463 /// WeakUndeclaredIdentifiers - Identifiers contained in 464 /// #pragma weak before declared. rare. may alias another 465 /// identifier, declared or undeclared 466 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 467 468 /// \brief Load weak undeclared identifiers from the external source. 469 void LoadExternalWeakUndeclaredIdentifiers(); 470 471 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 472 /// #pragma weak during processing of other Decls. 473 /// I couldn't figure out a clean way to generate these in-line, so 474 /// we store them here and handle separately -- which is a hack. 475 /// It would be best to refactor this. 476 SmallVector<Decl*,2> WeakTopLevelDecl; 477 478 IdentifierResolver IdResolver; 479 480 /// Translation Unit Scope - useful to Objective-C actions that need 481 /// to lookup file scope declarations in the "ordinary" C decl namespace. 482 /// For example, user-defined classes, built-in "id" type, etc. 483 Scope *TUScope; 484 485 /// \brief The C++ "std" namespace, where the standard library resides. 486 LazyDeclPtr StdNamespace; 487 488 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 489 /// standard library. 490 LazyDeclPtr StdBadAlloc; 491 492 /// \brief The C++ "std::initializer_list" template, which is defined in 493 /// <initializer_list>. 494 ClassTemplateDecl *StdInitializerList; 495 496 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 497 RecordDecl *CXXTypeInfoDecl; 498 499 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 500 RecordDecl *MSVCGuidDecl; 501 502 /// A flag to remember whether the implicit forms of operator new and delete 503 /// have been declared. 504 bool GlobalNewDeleteDeclared; 505 506 507 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 508 /// call was found yet. 509 bool ObjCShouldCallSuperDealloc; 510 /// A flag that is set when parsing a -finalize method and no [super finalize] 511 /// call was found yet. 512 bool ObjCShouldCallSuperFinalize; 513 514 /// \brief The set of declarations that have been referenced within 515 /// a potentially evaluated expression. 516 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 517 PotentiallyReferencedDecls; 518 519 /// \brief A set of diagnostics that may be emitted. 520 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 521 PotentiallyEmittedDiagnostics; 522 523 typedef SmallVector<sema::DelayedDiagnostic, 10> 524 PotentiallyEmittedDelayedDiag; 525 526 typedef SmallVector<sema::PossiblyUnreachableDiag, 10> 527 PotentiallyEmittedPossiblyUnreachableDiag; 528 529 /// \brief Describes how the expressions currently being parsed are 530 /// evaluated at run-time, if at all. 531 enum ExpressionEvaluationContext { 532 /// \brief The current expression and its subexpressions occur within an 533 /// unevaluated operand (C++11 [expr]p7), such as the subexpression of 534 /// \c sizeof, where the type of the expression may be significant but 535 /// no code will be generated to evaluate the value of the expression at 536 /// run time. 537 Unevaluated, 538 539 /// \brief The current expression and its subexpressions occur within a 540 /// constant expression. Such a context is not potentially-evaluated in 541 /// C++98, but is potentially-evaluated in C++11. 542 ConstantEvaluated, 543 544 /// \brief The current expression is potentially evaluated at run time, 545 /// which means that code may be generated to evaluate the value of the 546 /// expression at run time. 547 PotentiallyEvaluated, 548 549 /// \brief The current expression may be potentially evaluated or it may 550 /// be unevaluated, but it is impossible to tell from the lexical context. 551 /// This evaluation context is used primary for the operand of the C++ 552 /// \c typeid expression, whose argument is potentially evaluated only when 553 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 554 PotentiallyPotentiallyEvaluated, 555 556 /// \brief The current expression is potentially evaluated, but any 557 /// declarations referenced inside that expression are only used if 558 /// in fact the current expression is used. 559 /// 560 /// This value is used when parsing default function arguments, for which 561 /// we would like to provide diagnostics (e.g., passing non-POD arguments 562 /// through varargs) but do not want to mark declarations as "referenced" 563 /// until the default argument is used. 564 PotentiallyEvaluatedIfUsed 565 }; 566 567 /// \brief Data structure used to record current or nested 568 /// expression evaluation contexts. 569 struct ExpressionEvaluationContextRecord { 570 /// \brief The expression evaluation context. 571 ExpressionEvaluationContext Context; 572 573 /// \brief Whether the enclosing context needed a cleanup. 574 bool ParentNeedsCleanups; 575 576 /// \brief The number of active cleanup objects when we entered 577 /// this expression evaluation context. 578 unsigned NumCleanupObjects; 579 580 /// \brief The set of declarations referenced within a 581 /// potentially potentially-evaluated context. 582 /// 583 /// When leaving a potentially potentially-evaluated context, each 584 /// of these elements will be as referenced if the corresponding 585 /// potentially potentially evaluated expression is potentially 586 /// evaluated. 587 PotentiallyReferencedDecls *PotentiallyReferenced; 588 589 // There are three kinds of diagnostics we care about in 590 // PotentiallyPotentiallyEvaluated contexts: regular Diag diagnostics, 591 // DelayedDiagnostics, and DiagRuntimeBehavior diagnostics. 592 PotentiallyEmittedDiagnostics *SavedDiag; 593 PotentiallyEmittedDelayedDiag *SavedDelayedDiag; 594 PotentiallyEmittedPossiblyUnreachableDiag *SavedRuntimeDiag; 595 596 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 597 unsigned NumCleanupObjects, 598 bool ParentNeedsCleanups) 599 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 600 NumCleanupObjects(NumCleanupObjects), 601 PotentiallyReferenced(0), SavedDiag(0), SavedDelayedDiag(0), 602 SavedRuntimeDiag(0) { } 603 604 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 605 if (!PotentiallyReferenced) 606 PotentiallyReferenced = new PotentiallyReferencedDecls; 607 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 608 } 609 610 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD); 611 612 void addRuntimeDiagnostic(const sema::PossiblyUnreachableDiag &PUD); 613 614 void addDelayedDiagnostic(const sema::DelayedDiagnostic &DD); 615 616 void Destroy(); 617 }; 618 619 /// A stack of expression evaluation contexts. 620 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 621 622 /// SpecialMemberOverloadResult - The overloading result for a special member 623 /// function. 624 /// 625 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 626 /// integer is used to determine whether we have a parameter qualification 627 /// match, the second-lowest is whether we had success in resolving the 628 /// overload to a unique non-deleted function. 629 /// 630 /// The ConstParamMatch bit represents whether, when looking up a copy 631 /// constructor or assignment operator, we found a potential copy 632 /// constructor/assignment operator whose first parameter is const-qualified. 633 /// This is used for determining parameter types of other objects and is 634 /// utterly meaningless on other types of special members. 635 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 636 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 637 public: 638 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 639 : FastFoldingSetNode(ID) 640 {} 641 642 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 643 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 644 645 bool hasSuccess() const { return Pair.getInt() & 0x1; } 646 void setSuccess(bool B) { 647 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 648 } 649 650 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 651 void setConstParamMatch(bool B) { 652 Pair.setInt(B << 1 | unsigned(hasSuccess())); 653 } 654 }; 655 656 /// \brief A cache of special member function overload resolution results 657 /// for C++ records. 658 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 659 660 /// \brief The kind of translation unit we are processing. 661 /// 662 /// When we're processing a complete translation unit, Sema will perform 663 /// end-of-translation-unit semantic tasks (such as creating 664 /// initializers for tentative definitions in C) once parsing has 665 /// completed. Modules and precompiled headers perform different kinds of 666 /// checks. 667 TranslationUnitKind TUKind; 668 669 llvm::BumpPtrAllocator BumpAlloc; 670 671 /// \brief The number of SFINAE diagnostics that have been trapped. 672 unsigned NumSFINAEErrors; 673 674 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 675 UnparsedDefaultArgInstantiationsMap; 676 677 /// \brief A mapping from parameters with unparsed default arguments to the 678 /// set of instantiations of each parameter. 679 /// 680 /// This mapping is a temporary data structure used when parsing 681 /// nested class templates or nested classes of class templates, 682 /// where we might end up instantiating an inner class before the 683 /// default arguments of its methods have been parsed. 684 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 685 686 // Contains the locations of the beginning of unparsed default 687 // argument locations. 688 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 689 690 /// UndefinedInternals - all the used, undefined objects with 691 /// internal linkage in this translation unit. 692 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 693 694 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 695 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 696 697 /// Method Pool - allows efficient lookup when typechecking messages to "id". 698 /// We need to maintain a list, since selectors can have differing signatures 699 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 700 /// of selectors are "overloaded"). 701 GlobalMethodPool MethodPool; 702 703 /// Method selectors used in a @selector expression. Used for implementation 704 /// of -Wselector. 705 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 706 707 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 708 709 /// Private Helper predicate to check for 'self'. 710 bool isSelfExpr(Expr *RExpr); 711public: 712 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 713 TranslationUnitKind TUKind = TU_Complete, 714 CodeCompleteConsumer *CompletionConsumer = 0); 715 ~Sema(); 716 717 /// \brief Perform initialization that occurs after the parser has been 718 /// initialized but before it parses anything. 719 void Initialize(); 720 721 const LangOptions &getLangOptions() const { return LangOpts; } 722 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 723 FPOptions &getFPOptions() { return FPFeatures; } 724 725 DiagnosticsEngine &getDiagnostics() const { return Diags; } 726 SourceManager &getSourceManager() const { return SourceMgr; } 727 const TargetAttributesSema &getTargetAttributesSema() const; 728 Preprocessor &getPreprocessor() const { return PP; } 729 ASTContext &getASTContext() const { return Context; } 730 ASTConsumer &getASTConsumer() const { return Consumer; } 731 ASTMutationListener *getASTMutationListener() const; 732 733 void PrintStats() const; 734 735 /// \brief Helper class that creates diagnostics with optional 736 /// template instantiation stacks. 737 /// 738 /// This class provides a wrapper around the basic DiagnosticBuilder 739 /// class that emits diagnostics. SemaDiagnosticBuilder is 740 /// responsible for emitting the diagnostic (as DiagnosticBuilder 741 /// does) and, if the diagnostic comes from inside a template 742 /// instantiation, printing the template instantiation stack as 743 /// well. 744 class SemaDiagnosticBuilder : public DiagnosticBuilder { 745 Sema &SemaRef; 746 unsigned DiagID; 747 748 public: 749 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 750 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 751 752 explicit SemaDiagnosticBuilder(Sema &SemaRef) 753 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 754 755 ~SemaDiagnosticBuilder(); 756 }; 757 758 /// \brief Emit a diagnostic. 759 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 760 761 /// \brief Emit a partial diagnostic. 762 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 763 764 /// \brief Build a partial diagnostic. 765 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 766 767 bool findMacroSpelling(SourceLocation &loc, StringRef name); 768 769 /// \brief Get a string to suggest for zero-initialization of a type. 770 const char *getFixItZeroInitializerForType(QualType T) const; 771 772 ExprResult Owned(Expr* E) { return E; } 773 ExprResult Owned(ExprResult R) { return R; } 774 StmtResult Owned(Stmt* S) { return S; } 775 776 void ActOnEndOfTranslationUnit(); 777 778 void CheckDelegatingCtorCycles(); 779 780 Scope *getScopeForContext(DeclContext *Ctx); 781 782 void PushFunctionScope(); 783 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 784 void PushLambdaScope(CXXRecordDecl *Lambda); 785 void PopFunctionScopeInfo(const sema::AnalysisBasedWarnings::Policy *WP =0, 786 const Decl *D = 0, const BlockExpr *blkExpr = 0); 787 788 sema::FunctionScopeInfo *getCurFunction() const { 789 return FunctionScopes.back(); 790 } 791 792 bool hasAnyUnrecoverableErrorsInThisFunction() const; 793 794 /// \brief Retrieve the current block, if any. 795 sema::BlockScopeInfo *getCurBlock(); 796 797 /// \brief Retrieve the current lambda expression, if any. 798 sema::LambdaScopeInfo *getCurLambda(); 799 800 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 801 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 802 803 //===--------------------------------------------------------------------===// 804 // Type Analysis / Processing: SemaType.cpp. 805 // 806 807 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 808 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 809 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 810 } 811 QualType BuildPointerType(QualType T, 812 SourceLocation Loc, DeclarationName Entity); 813 QualType BuildReferenceType(QualType T, bool LValueRef, 814 SourceLocation Loc, DeclarationName Entity); 815 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 816 Expr *ArraySize, unsigned Quals, 817 SourceRange Brackets, DeclarationName Entity); 818 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 819 SourceLocation AttrLoc); 820 QualType BuildFunctionType(QualType T, 821 QualType *ParamTypes, unsigned NumParamTypes, 822 bool Variadic, unsigned Quals, 823 RefQualifierKind RefQualifier, 824 SourceLocation Loc, DeclarationName Entity, 825 FunctionType::ExtInfo Info); 826 QualType BuildMemberPointerType(QualType T, QualType Class, 827 SourceLocation Loc, 828 DeclarationName Entity); 829 QualType BuildBlockPointerType(QualType T, 830 SourceLocation Loc, DeclarationName Entity); 831 QualType BuildParenType(QualType T); 832 QualType BuildAtomicType(QualType T, SourceLocation Loc); 833 834 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 835 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 836 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 837 TypeSourceInfo *ReturnTypeInfo); 838 /// \brief Package the given type and TSI into a ParsedType. 839 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 840 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 841 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 842 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 843 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 844 bool CheckDistantExceptionSpec(QualType T); 845 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 846 bool CheckEquivalentExceptionSpec( 847 const FunctionProtoType *Old, SourceLocation OldLoc, 848 const FunctionProtoType *New, SourceLocation NewLoc); 849 bool CheckEquivalentExceptionSpec( 850 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 851 const FunctionProtoType *Old, SourceLocation OldLoc, 852 const FunctionProtoType *New, SourceLocation NewLoc, 853 bool *MissingExceptionSpecification = 0, 854 bool *MissingEmptyExceptionSpecification = 0, 855 bool AllowNoexceptAllMatchWithNoSpec = false, 856 bool IsOperatorNew = false); 857 bool CheckExceptionSpecSubset( 858 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 859 const FunctionProtoType *Superset, SourceLocation SuperLoc, 860 const FunctionProtoType *Subset, SourceLocation SubLoc); 861 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 862 const FunctionProtoType *Target, SourceLocation TargetLoc, 863 const FunctionProtoType *Source, SourceLocation SourceLoc); 864 865 TypeResult ActOnTypeName(Scope *S, Declarator &D); 866 867 /// \brief The parser has parsed the context-sensitive type 'instancetype' 868 /// in an Objective-C message declaration. Return the appropriate type. 869 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 870 871 bool RequireCompleteType(SourceLocation Loc, QualType T, 872 const PartialDiagnostic &PD, 873 std::pair<SourceLocation, PartialDiagnostic> Note); 874 bool RequireCompleteType(SourceLocation Loc, QualType T, 875 const PartialDiagnostic &PD); 876 bool RequireCompleteType(SourceLocation Loc, QualType T, 877 unsigned DiagID); 878 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 879 std::pair<SourceLocation, 880 PartialDiagnostic> Note); 881 882 bool RequireLiteralType(SourceLocation Loc, QualType T, 883 const PartialDiagnostic &PD, 884 bool AllowIncompleteType = false); 885 886 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 887 const CXXScopeSpec &SS, QualType T); 888 889 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 890 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 891 QualType BuildUnaryTransformType(QualType BaseType, 892 UnaryTransformType::UTTKind UKind, 893 SourceLocation Loc); 894 895 //===--------------------------------------------------------------------===// 896 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 897 // 898 899 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 900 901 void DiagnoseUseOfUnimplementedSelectors(); 902 903 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 904 Scope *S, CXXScopeSpec *SS = 0, 905 bool isClassName = false, 906 bool HasTrailingDot = false, 907 ParsedType ObjectType = ParsedType(), 908 bool WantNontrivialTypeSourceInfo = false, 909 IdentifierInfo **CorrectedII = 0); 910 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 911 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS, Scope *S); 912 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 913 SourceLocation IILoc, 914 Scope *S, 915 CXXScopeSpec *SS, 916 ParsedType &SuggestedType); 917 918 /// \brief Describes the result of the name lookup and resolution performed 919 /// by \c ClassifyName(). 920 enum NameClassificationKind { 921 NC_Unknown, 922 NC_Error, 923 NC_Keyword, 924 NC_Type, 925 NC_Expression, 926 NC_NestedNameSpecifier, 927 NC_TypeTemplate, 928 NC_FunctionTemplate 929 }; 930 931 class NameClassification { 932 NameClassificationKind Kind; 933 ExprResult Expr; 934 TemplateName Template; 935 ParsedType Type; 936 const IdentifierInfo *Keyword; 937 938 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 939 940 public: 941 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 942 943 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 944 945 NameClassification(const IdentifierInfo *Keyword) 946 : Kind(NC_Keyword), Keyword(Keyword) { } 947 948 static NameClassification Error() { 949 return NameClassification(NC_Error); 950 } 951 952 static NameClassification Unknown() { 953 return NameClassification(NC_Unknown); 954 } 955 956 static NameClassification NestedNameSpecifier() { 957 return NameClassification(NC_NestedNameSpecifier); 958 } 959 960 static NameClassification TypeTemplate(TemplateName Name) { 961 NameClassification Result(NC_TypeTemplate); 962 Result.Template = Name; 963 return Result; 964 } 965 966 static NameClassification FunctionTemplate(TemplateName Name) { 967 NameClassification Result(NC_FunctionTemplate); 968 Result.Template = Name; 969 return Result; 970 } 971 972 NameClassificationKind getKind() const { return Kind; } 973 974 ParsedType getType() const { 975 assert(Kind == NC_Type); 976 return Type; 977 } 978 979 ExprResult getExpression() const { 980 assert(Kind == NC_Expression); 981 return Expr; 982 } 983 984 TemplateName getTemplateName() const { 985 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 986 return Template; 987 } 988 989 TemplateNameKind getTemplateNameKind() const { 990 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 991 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 992 } 993}; 994 995 /// \brief Perform name lookup on the given name, classifying it based on 996 /// the results of name lookup and the following token. 997 /// 998 /// This routine is used by the parser to resolve identifiers and help direct 999 /// parsing. When the identifier cannot be found, this routine will attempt 1000 /// to correct the typo and classify based on the resulting name. 1001 /// 1002 /// \param S The scope in which we're performing name lookup. 1003 /// 1004 /// \param SS The nested-name-specifier that precedes the name. 1005 /// 1006 /// \param Name The identifier. If typo correction finds an alternative name, 1007 /// this pointer parameter will be updated accordingly. 1008 /// 1009 /// \param NameLoc The location of the identifier. 1010 /// 1011 /// \param NextToken The token following the identifier. Used to help 1012 /// disambiguate the name. 1013 NameClassification ClassifyName(Scope *S, 1014 CXXScopeSpec &SS, 1015 IdentifierInfo *&Name, 1016 SourceLocation NameLoc, 1017 const Token &NextToken); 1018 1019 Decl *ActOnDeclarator(Scope *S, Declarator &D); 1020 1021 Decl *HandleDeclarator(Scope *S, Declarator &D, 1022 MultiTemplateParamsArg TemplateParameterLists); 1023 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 1024 const LookupResult &Previous, 1025 Scope *S); 1026 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 1027 void DiagnoseFunctionSpecifiers(Declarator& D); 1028 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 1029 void CheckShadow(Scope *S, VarDecl *D); 1030 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 1031 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 1032 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1033 TypeSourceInfo *TInfo, 1034 LookupResult &Previous); 1035 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 1036 LookupResult &Previous, bool &Redeclaration); 1037 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1038 TypeSourceInfo *TInfo, 1039 LookupResult &Previous, 1040 MultiTemplateParamsArg TemplateParamLists); 1041 // Returns true if the variable declaration is a redeclaration 1042 bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous); 1043 void CheckCompleteVariableDeclaration(VarDecl *var); 1044 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1045 TypeSourceInfo *TInfo, 1046 LookupResult &Previous, 1047 MultiTemplateParamsArg TemplateParamLists, 1048 bool &AddToScope); 1049 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1050 1051 /// \brief The kind of constexpr declaration checking we are performing. 1052 /// 1053 /// The kind affects which diagnostics (if any) are emitted if the function 1054 /// does not satisfy the requirements of a constexpr function declaration. 1055 enum CheckConstexprKind { 1056 /// \brief Check a constexpr function declaration, and produce errors if it 1057 /// does not satisfy the requirements. 1058 CCK_Declaration, 1059 /// \brief Check a constexpr function template instantiation. 1060 CCK_Instantiation, 1061 /// \brief Produce notes explaining why an instantiation was not constexpr. 1062 CCK_NoteNonConstexprInstantiation 1063 }; 1064 bool CheckConstexprFunctionDecl(const FunctionDecl *FD, 1065 CheckConstexprKind CCK); 1066 bool CheckConstexprFunctionBody(const FunctionDecl *FD, Stmt *Body); 1067 1068 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1069 // Returns true if the function declaration is a redeclaration 1070 bool CheckFunctionDeclaration(Scope *S, 1071 FunctionDecl *NewFD, LookupResult &Previous, 1072 bool IsExplicitSpecialization); 1073 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1074 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1075 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1076 SourceLocation Loc, 1077 QualType T); 1078 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1079 SourceLocation NameLoc, IdentifierInfo *Name, 1080 QualType T, TypeSourceInfo *TSInfo, 1081 StorageClass SC, StorageClass SCAsWritten); 1082 void ActOnParamDefaultArgument(Decl *param, 1083 SourceLocation EqualLoc, 1084 Expr *defarg); 1085 void ActOnParamUnparsedDefaultArgument(Decl *param, 1086 SourceLocation EqualLoc, 1087 SourceLocation ArgLoc); 1088 void ActOnParamDefaultArgumentError(Decl *param); 1089 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1090 SourceLocation EqualLoc); 1091 1092 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1093 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1094 bool TypeMayContainAuto); 1095 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1096 void ActOnInitializerError(Decl *Dcl); 1097 void ActOnCXXForRangeDecl(Decl *D); 1098 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1099 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1100 void FinalizeDeclaration(Decl *D); 1101 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1102 Decl **Group, 1103 unsigned NumDecls); 1104 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1105 bool TypeMayContainAuto = true); 1106 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1107 SourceLocation LocAfterDecls); 1108 void CheckForFunctionRedefinition(FunctionDecl *FD); 1109 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1110 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1111 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1112 1113 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1114 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1115 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1116 1117 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1118 /// attribute for which parsing is delayed. 1119 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1120 1121 /// \brief Diagnose any unused parameters in the given sequence of 1122 /// ParmVarDecl pointers. 1123 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1124 ParmVarDecl * const *End); 1125 1126 /// \brief Diagnose whether the size of parameters or return value of a 1127 /// function or obj-c method definition is pass-by-value and larger than a 1128 /// specified threshold. 1129 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1130 ParmVarDecl * const *End, 1131 QualType ReturnTy, 1132 NamedDecl *D); 1133 1134 void DiagnoseInvalidJumps(Stmt *Body); 1135 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1136 SourceLocation AsmLoc, 1137 SourceLocation RParenLoc); 1138 1139 /// \brief The parser has processed a module import declaration. 1140 /// 1141 /// \param AtLoc The location of the '@' symbol, if any. 1142 /// 1143 /// \param ImportLoc The location of the 'import' keyword. 1144 /// 1145 /// \param Path The module access path. 1146 DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc, 1147 ModuleIdPath Path); 1148 1149 /// \brief Retrieve a suitable printing policy. 1150 PrintingPolicy getPrintingPolicy() const { 1151 return getPrintingPolicy(Context, PP); 1152 } 1153 1154 /// \brief Retrieve a suitable printing policy. 1155 static PrintingPolicy getPrintingPolicy(const ASTContext &Ctx, 1156 const Preprocessor &PP); 1157 1158 /// Scope actions. 1159 void ActOnPopScope(SourceLocation Loc, Scope *S); 1160 void ActOnTranslationUnitScope(Scope *S); 1161 1162 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1163 DeclSpec &DS); 1164 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1165 DeclSpec &DS, 1166 MultiTemplateParamsArg TemplateParams); 1167 1168 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1169 AccessSpecifier AS, 1170 RecordDecl *Record); 1171 1172 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1173 RecordDecl *Record); 1174 1175 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1176 TagTypeKind NewTag, bool isDefinition, 1177 SourceLocation NewTagLoc, 1178 const IdentifierInfo &Name); 1179 1180 enum TagUseKind { 1181 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1182 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1183 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1184 TUK_Friend // Friend declaration: 'friend struct foo;' 1185 }; 1186 1187 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1188 SourceLocation KWLoc, CXXScopeSpec &SS, 1189 IdentifierInfo *Name, SourceLocation NameLoc, 1190 AttributeList *Attr, AccessSpecifier AS, 1191 SourceLocation ModulePrivateLoc, 1192 MultiTemplateParamsArg TemplateParameterLists, 1193 bool &OwnedDecl, bool &IsDependent, 1194 SourceLocation ScopedEnumKWLoc, 1195 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1196 1197 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1198 unsigned TagSpec, SourceLocation TagLoc, 1199 CXXScopeSpec &SS, 1200 IdentifierInfo *Name, SourceLocation NameLoc, 1201 AttributeList *Attr, 1202 MultiTemplateParamsArg TempParamLists); 1203 1204 TypeResult ActOnDependentTag(Scope *S, 1205 unsigned TagSpec, 1206 TagUseKind TUK, 1207 const CXXScopeSpec &SS, 1208 IdentifierInfo *Name, 1209 SourceLocation TagLoc, 1210 SourceLocation NameLoc); 1211 1212 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1213 IdentifierInfo *ClassName, 1214 SmallVectorImpl<Decl *> &Decls); 1215 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1216 Declarator &D, Expr *BitfieldWidth); 1217 1218 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1219 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1220 AccessSpecifier AS); 1221 1222 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1223 TypeSourceInfo *TInfo, 1224 RecordDecl *Record, SourceLocation Loc, 1225 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1226 SourceLocation TSSL, 1227 AccessSpecifier AS, NamedDecl *PrevDecl, 1228 Declarator *D = 0); 1229 1230 enum CXXSpecialMember { 1231 CXXDefaultConstructor, 1232 CXXCopyConstructor, 1233 CXXMoveConstructor, 1234 CXXCopyAssignment, 1235 CXXMoveAssignment, 1236 CXXDestructor, 1237 CXXInvalid 1238 }; 1239 bool CheckNontrivialField(FieldDecl *FD); 1240 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1241 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1242 void ActOnLastBitfield(SourceLocation DeclStart, 1243 SmallVectorImpl<Decl *> &AllIvarDecls); 1244 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1245 Declarator &D, Expr *BitfieldWidth, 1246 tok::ObjCKeywordKind visibility); 1247 1248 // This is used for both record definitions and ObjC interface declarations. 1249 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1250 llvm::ArrayRef<Decl *> Fields, 1251 SourceLocation LBrac, SourceLocation RBrac, 1252 AttributeList *AttrList); 1253 1254 /// ActOnTagStartDefinition - Invoked when we have entered the 1255 /// scope of a tag's definition (e.g., for an enumeration, class, 1256 /// struct, or union). 1257 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1258 1259 Decl *ActOnObjCContainerStartDefinition(Decl *IDecl); 1260 1261 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1262 /// C++ record definition's base-specifiers clause and are starting its 1263 /// member declarations. 1264 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1265 SourceLocation FinalLoc, 1266 SourceLocation LBraceLoc); 1267 1268 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1269 /// the definition of a tag (enumeration, class, struct, or union). 1270 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1271 SourceLocation RBraceLoc); 1272 1273 void ActOnObjCContainerFinishDefinition(); 1274 1275 /// \brief Invoked when we must temporarily exit the objective-c container 1276 /// scope for parsing/looking-up C constructs. 1277 /// 1278 /// Must be followed by a call to \see ActOnObjCReenterContainerContext 1279 void ActOnObjCTemporaryExitContainerContext(DeclContext *DC); 1280 void ActOnObjCReenterContainerContext(DeclContext *DC); 1281 1282 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1283 /// error parsing the definition of a tag. 1284 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1285 1286 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1287 EnumConstantDecl *LastEnumConst, 1288 SourceLocation IdLoc, 1289 IdentifierInfo *Id, 1290 Expr *val); 1291 1292 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1293 SourceLocation IdLoc, IdentifierInfo *Id, 1294 AttributeList *Attrs, 1295 SourceLocation EqualLoc, Expr *Val); 1296 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1297 SourceLocation RBraceLoc, Decl *EnumDecl, 1298 Decl **Elements, unsigned NumElements, 1299 Scope *S, AttributeList *Attr); 1300 1301 DeclContext *getContainingDC(DeclContext *DC); 1302 1303 /// Set the current declaration context until it gets popped. 1304 void PushDeclContext(Scope *S, DeclContext *DC); 1305 void PopDeclContext(); 1306 1307 /// EnterDeclaratorContext - Used when we must lookup names in the context 1308 /// of a declarator's nested name specifier. 1309 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1310 void ExitDeclaratorContext(Scope *S); 1311 1312 /// Push the parameters of D, which must be a function, into scope. 1313 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1314 void ActOnExitFunctionContext() { PopDeclContext(); } 1315 1316 DeclContext *getFunctionLevelDeclContext(); 1317 1318 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1319 /// to the function decl for the function being parsed. If we're currently 1320 /// in a 'block', this returns the containing context. 1321 FunctionDecl *getCurFunctionDecl(); 1322 1323 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1324 /// the method decl for the method being parsed. If we're currently 1325 /// in a 'block', this returns the containing context. 1326 ObjCMethodDecl *getCurMethodDecl(); 1327 1328 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1329 /// or C function we're in, otherwise return null. If we're currently 1330 /// in a 'block', this returns the containing context. 1331 NamedDecl *getCurFunctionOrMethodDecl(); 1332 1333 /// Add this decl to the scope shadowed decl chains. 1334 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1335 1336 /// \brief Make the given externally-produced declaration visible at the 1337 /// top level scope. 1338 /// 1339 /// \param D The externally-produced declaration to push. 1340 /// 1341 /// \param Name The name of the externally-produced declaration. 1342 void pushExternalDeclIntoScope(NamedDecl *D, DeclarationName Name); 1343 1344 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1345 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1346 /// true if 'D' belongs to the given declaration context. 1347 /// 1348 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1349 /// whether the declaration is in scope for the purposes of explicit template 1350 /// instantiation or specialization. The default is false. 1351 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1352 bool ExplicitInstantiationOrSpecialization = false); 1353 1354 /// Finds the scope corresponding to the given decl context, if it 1355 /// happens to be an enclosing scope. Otherwise return NULL. 1356 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1357 1358 /// Subroutines of ActOnDeclarator(). 1359 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1360 TypeSourceInfo *TInfo); 1361 bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New); 1362 void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true); 1363 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1364 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1365 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1366 void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old); 1367 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1368 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1369 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1370 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1371 1372 // AssignmentAction - This is used by all the assignment diagnostic functions 1373 // to represent what is actually causing the operation 1374 enum AssignmentAction { 1375 AA_Assigning, 1376 AA_Passing, 1377 AA_Returning, 1378 AA_Converting, 1379 AA_Initializing, 1380 AA_Sending, 1381 AA_Casting 1382 }; 1383 1384 /// C++ Overloading. 1385 enum OverloadKind { 1386 /// This is a legitimate overload: the existing declarations are 1387 /// functions or function templates with different signatures. 1388 Ovl_Overload, 1389 1390 /// This is not an overload because the signature exactly matches 1391 /// an existing declaration. 1392 Ovl_Match, 1393 1394 /// This is not an overload because the lookup results contain a 1395 /// non-function. 1396 Ovl_NonFunction 1397 }; 1398 OverloadKind CheckOverload(Scope *S, 1399 FunctionDecl *New, 1400 const LookupResult &OldDecls, 1401 NamedDecl *&OldDecl, 1402 bool IsForUsingDecl); 1403 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1404 1405 /// \brief Checks availability of the function depending on the current 1406 /// function context.Inside an unavailable function,unavailability is ignored. 1407 /// 1408 /// \returns true if \arg FD is unavailable and current context is inside 1409 /// an available function, false otherwise. 1410 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1411 1412 ImplicitConversionSequence 1413 TryImplicitConversion(Expr *From, QualType ToType, 1414 bool SuppressUserConversions, 1415 bool AllowExplicit, 1416 bool InOverloadResolution, 1417 bool CStyle, 1418 bool AllowObjCWritebackConversion); 1419 1420 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1421 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1422 bool IsComplexPromotion(QualType FromType, QualType ToType); 1423 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1424 bool InOverloadResolution, 1425 QualType& ConvertedType, bool &IncompatibleObjC); 1426 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1427 QualType& ConvertedType, bool &IncompatibleObjC); 1428 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1429 QualType &ConvertedType); 1430 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1431 QualType& ConvertedType); 1432 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1433 const FunctionProtoType *NewType, 1434 unsigned *ArgPos = 0); 1435 void HandleFunctionTypeMismatch(PartialDiagnostic &PDiag, 1436 QualType FromType, QualType ToType); 1437 1438 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1439 bool CheckPointerConversion(Expr *From, QualType ToType, 1440 CastKind &Kind, 1441 CXXCastPath& BasePath, 1442 bool IgnoreBaseAccess); 1443 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1444 bool InOverloadResolution, 1445 QualType &ConvertedType); 1446 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1447 CastKind &Kind, 1448 CXXCastPath &BasePath, 1449 bool IgnoreBaseAccess); 1450 bool IsQualificationConversion(QualType FromType, QualType ToType, 1451 bool CStyle, bool &ObjCLifetimeConversion); 1452 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1453 QualType &ResultTy); 1454 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1455 1456 1457 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1458 const VarDecl *NRVOCandidate, 1459 QualType ResultType, 1460 Expr *Value, 1461 bool AllowNRVO = true); 1462 1463 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1464 ExprResult Init); 1465 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1466 SourceLocation EqualLoc, 1467 ExprResult Init, 1468 bool TopLevelOfInitList = false); 1469 ExprResult PerformObjectArgumentInitialization(Expr *From, 1470 NestedNameSpecifier *Qualifier, 1471 NamedDecl *FoundDecl, 1472 CXXMethodDecl *Method); 1473 1474 ExprResult PerformContextuallyConvertToBool(Expr *From); 1475 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1476 1477 /// Contexts in which a converted constant expression is required. 1478 enum CCEKind { 1479 CCEK_CaseValue, ///< Expression in a case label. 1480 CCEK_Enumerator, ///< Enumerator value with fixed underlying type. 1481 CCEK_TemplateArg ///< Value of a non-type template parameter. 1482 }; 1483 ExprResult CheckConvertedConstantExpression(Expr *From, QualType T, 1484 llvm::APSInt &Value, CCEKind CCE); 1485 1486 ExprResult 1487 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1488 const PartialDiagnostic &NotIntDiag, 1489 const PartialDiagnostic &IncompleteDiag, 1490 const PartialDiagnostic &ExplicitConvDiag, 1491 const PartialDiagnostic &ExplicitConvNote, 1492 const PartialDiagnostic &AmbigDiag, 1493 const PartialDiagnostic &AmbigNote, 1494 const PartialDiagnostic &ConvDiag); 1495 1496 ExprResult PerformObjectMemberConversion(Expr *From, 1497 NestedNameSpecifier *Qualifier, 1498 NamedDecl *FoundDecl, 1499 NamedDecl *Member); 1500 1501 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1502 // TODO: make this is a typesafe union. 1503 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1504 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1505 1506 void AddOverloadCandidate(NamedDecl *Function, 1507 DeclAccessPair FoundDecl, 1508 Expr **Args, unsigned NumArgs, 1509 OverloadCandidateSet &CandidateSet); 1510 1511 void AddOverloadCandidate(FunctionDecl *Function, 1512 DeclAccessPair FoundDecl, 1513 Expr **Args, unsigned NumArgs, 1514 OverloadCandidateSet& CandidateSet, 1515 bool SuppressUserConversions = false, 1516 bool PartialOverloading = false); 1517 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1518 Expr **Args, unsigned NumArgs, 1519 OverloadCandidateSet& CandidateSet, 1520 bool SuppressUserConversions = false); 1521 void AddMethodCandidate(DeclAccessPair FoundDecl, 1522 QualType ObjectType, 1523 Expr::Classification ObjectClassification, 1524 Expr **Args, unsigned NumArgs, 1525 OverloadCandidateSet& CandidateSet, 1526 bool SuppressUserConversion = false); 1527 void AddMethodCandidate(CXXMethodDecl *Method, 1528 DeclAccessPair FoundDecl, 1529 CXXRecordDecl *ActingContext, QualType ObjectType, 1530 Expr::Classification ObjectClassification, 1531 Expr **Args, unsigned NumArgs, 1532 OverloadCandidateSet& CandidateSet, 1533 bool SuppressUserConversions = false); 1534 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1535 DeclAccessPair FoundDecl, 1536 CXXRecordDecl *ActingContext, 1537 TemplateArgumentListInfo *ExplicitTemplateArgs, 1538 QualType ObjectType, 1539 Expr::Classification ObjectClassification, 1540 Expr **Args, unsigned NumArgs, 1541 OverloadCandidateSet& CandidateSet, 1542 bool SuppressUserConversions = false); 1543 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1544 DeclAccessPair FoundDecl, 1545 TemplateArgumentListInfo *ExplicitTemplateArgs, 1546 Expr **Args, unsigned NumArgs, 1547 OverloadCandidateSet& CandidateSet, 1548 bool SuppressUserConversions = false); 1549 void AddConversionCandidate(CXXConversionDecl *Conversion, 1550 DeclAccessPair FoundDecl, 1551 CXXRecordDecl *ActingContext, 1552 Expr *From, QualType ToType, 1553 OverloadCandidateSet& CandidateSet); 1554 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1555 DeclAccessPair FoundDecl, 1556 CXXRecordDecl *ActingContext, 1557 Expr *From, QualType ToType, 1558 OverloadCandidateSet &CandidateSet); 1559 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1560 DeclAccessPair FoundDecl, 1561 CXXRecordDecl *ActingContext, 1562 const FunctionProtoType *Proto, 1563 Expr *Object, Expr **Args, unsigned NumArgs, 1564 OverloadCandidateSet& CandidateSet); 1565 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1566 SourceLocation OpLoc, 1567 Expr **Args, unsigned NumArgs, 1568 OverloadCandidateSet& CandidateSet, 1569 SourceRange OpRange = SourceRange()); 1570 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1571 Expr **Args, unsigned NumArgs, 1572 OverloadCandidateSet& CandidateSet, 1573 bool IsAssignmentOperator = false, 1574 unsigned NumContextualBoolArguments = 0); 1575 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1576 SourceLocation OpLoc, 1577 Expr **Args, unsigned NumArgs, 1578 OverloadCandidateSet& CandidateSet); 1579 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1580 bool Operator, 1581 Expr **Args, unsigned NumArgs, 1582 TemplateArgumentListInfo *ExplicitTemplateArgs, 1583 OverloadCandidateSet& CandidateSet, 1584 bool PartialOverloading = false, 1585 bool StdNamespaceIsAssociated = false); 1586 1587 // Emit as a 'note' the specific overload candidate 1588 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1589 1590 // Emit as a series of 'note's all template and non-templates 1591 // identified by the expression Expr 1592 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1593 1594 // [PossiblyAFunctionType] --> [Return] 1595 // NonFunctionType --> NonFunctionType 1596 // R (A) --> R(A) 1597 // R (*)(A) --> R (A) 1598 // R (&)(A) --> R (A) 1599 // R (S::*)(A) --> R (A) 1600 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1601 1602 FunctionDecl * 1603 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1604 QualType TargetType, 1605 bool Complain, 1606 DeclAccessPair &Found, 1607 bool *pHadMultipleCandidates = 0); 1608 1609 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1610 bool Complain = false, 1611 DeclAccessPair* Found = 0); 1612 1613 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1614 ExprResult &SrcExpr, 1615 bool DoFunctionPointerConverion = false, 1616 bool Complain = false, 1617 const SourceRange& OpRangeForComplaining = SourceRange(), 1618 QualType DestTypeForComplaining = QualType(), 1619 unsigned DiagIDForComplaining = 0); 1620 1621 1622 Expr *FixOverloadedFunctionReference(Expr *E, 1623 DeclAccessPair FoundDecl, 1624 FunctionDecl *Fn); 1625 ExprResult FixOverloadedFunctionReference(ExprResult, 1626 DeclAccessPair FoundDecl, 1627 FunctionDecl *Fn); 1628 1629 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1630 Expr **Args, unsigned NumArgs, 1631 OverloadCandidateSet &CandidateSet, 1632 bool PartialOverloading = false); 1633 1634 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1635 UnresolvedLookupExpr *ULE, 1636 SourceLocation LParenLoc, 1637 Expr **Args, unsigned NumArgs, 1638 SourceLocation RParenLoc, 1639 Expr *ExecConfig); 1640 1641 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1642 unsigned Opc, 1643 const UnresolvedSetImpl &Fns, 1644 Expr *input); 1645 1646 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1647 unsigned Opc, 1648 const UnresolvedSetImpl &Fns, 1649 Expr *LHS, Expr *RHS); 1650 1651 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1652 SourceLocation RLoc, 1653 Expr *Base,Expr *Idx); 1654 1655 ExprResult 1656 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1657 SourceLocation LParenLoc, Expr **Args, 1658 unsigned NumArgs, SourceLocation RParenLoc); 1659 ExprResult 1660 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1661 Expr **Args, unsigned NumArgs, 1662 SourceLocation RParenLoc); 1663 1664 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1665 SourceLocation OpLoc); 1666 1667 /// CheckCallReturnType - Checks that a call expression's return type is 1668 /// complete. Returns true on failure. The location passed in is the location 1669 /// that best represents the call. 1670 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1671 CallExpr *CE, FunctionDecl *FD); 1672 1673 /// Helpers for dealing with blocks and functions. 1674 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1675 bool CheckParameterNames); 1676 void CheckCXXDefaultArguments(FunctionDecl *FD); 1677 void CheckExtraCXXDefaultArguments(Declarator &D); 1678 Scope *getNonFieldDeclScope(Scope *S); 1679 1680 /// \name Name lookup 1681 /// 1682 /// These routines provide name lookup that is used during semantic 1683 /// analysis to resolve the various kinds of names (identifiers, 1684 /// overloaded operator names, constructor names, etc.) into zero or 1685 /// more declarations within a particular scope. The major entry 1686 /// points are LookupName, which performs unqualified name lookup, 1687 /// and LookupQualifiedName, which performs qualified name lookup. 1688 /// 1689 /// All name lookup is performed based on some specific criteria, 1690 /// which specify what names will be visible to name lookup and how 1691 /// far name lookup should work. These criteria are important both 1692 /// for capturing language semantics (certain lookups will ignore 1693 /// certain names, for example) and for performance, since name 1694 /// lookup is often a bottleneck in the compilation of C++. Name 1695 /// lookup criteria is specified via the LookupCriteria enumeration. 1696 /// 1697 /// The results of name lookup can vary based on the kind of name 1698 /// lookup performed, the current language, and the translation 1699 /// unit. In C, for example, name lookup will either return nothing 1700 /// (no entity found) or a single declaration. In C++, name lookup 1701 /// can additionally refer to a set of overloaded functions or 1702 /// result in an ambiguity. All of the possible results of name 1703 /// lookup are captured by the LookupResult class, which provides 1704 /// the ability to distinguish among them. 1705 //@{ 1706 1707 /// @brief Describes the kind of name lookup to perform. 1708 enum LookupNameKind { 1709 /// Ordinary name lookup, which finds ordinary names (functions, 1710 /// variables, typedefs, etc.) in C and most kinds of names 1711 /// (functions, variables, members, types, etc.) in C++. 1712 LookupOrdinaryName = 0, 1713 /// Tag name lookup, which finds the names of enums, classes, 1714 /// structs, and unions. 1715 LookupTagName, 1716 /// Label name lookup. 1717 LookupLabel, 1718 /// Member name lookup, which finds the names of 1719 /// class/struct/union members. 1720 LookupMemberName, 1721 /// Look up of an operator name (e.g., operator+) for use with 1722 /// operator overloading. This lookup is similar to ordinary name 1723 /// lookup, but will ignore any declarations that are class members. 1724 LookupOperatorName, 1725 /// Look up of a name that precedes the '::' scope resolution 1726 /// operator in C++. This lookup completely ignores operator, object, 1727 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1728 LookupNestedNameSpecifierName, 1729 /// Look up a namespace name within a C++ using directive or 1730 /// namespace alias definition, ignoring non-namespace names (C++ 1731 /// [basic.lookup.udir]p1). 1732 LookupNamespaceName, 1733 /// Look up all declarations in a scope with the given name, 1734 /// including resolved using declarations. This is appropriate 1735 /// for checking redeclarations for a using declaration. 1736 LookupUsingDeclName, 1737 /// Look up an ordinary name that is going to be redeclared as a 1738 /// name with linkage. This lookup ignores any declarations that 1739 /// are outside of the current scope unless they have linkage. See 1740 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1741 LookupRedeclarationWithLinkage, 1742 /// Look up the name of an Objective-C protocol. 1743 LookupObjCProtocolName, 1744 /// Look up implicit 'self' parameter of an objective-c method. 1745 LookupObjCImplicitSelfParam, 1746 /// \brief Look up any declaration with any name. 1747 LookupAnyName 1748 }; 1749 1750 /// \brief Specifies whether (or how) name lookup is being performed for a 1751 /// redeclaration (vs. a reference). 1752 enum RedeclarationKind { 1753 /// \brief The lookup is a reference to this name that is not for the 1754 /// purpose of redeclaring the name. 1755 NotForRedeclaration = 0, 1756 /// \brief The lookup results will be used for redeclaration of a name, 1757 /// if an entity by that name already exists. 1758 ForRedeclaration 1759 }; 1760 1761private: 1762 bool CppLookupName(LookupResult &R, Scope *S); 1763 1764 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1765 CXXSpecialMember SM, 1766 bool ConstArg, 1767 bool VolatileArg, 1768 bool RValueThis, 1769 bool ConstThis, 1770 bool VolatileThis); 1771 1772 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1773 // 1774 // The boolean value will be true to indicate that the namespace was loaded 1775 // from an AST/PCH file, or false otherwise. 1776 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1777 1778 /// \brief Whether we have already loaded known namespaces from an extenal 1779 /// source. 1780 bool LoadedExternalKnownNamespaces; 1781 1782public: 1783 /// \brief Look up a name, looking for a single declaration. Return 1784 /// null if the results were absent, ambiguous, or overloaded. 1785 /// 1786 /// It is preferable to use the elaborated form and explicitly handle 1787 /// ambiguity and overloaded. 1788 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1789 SourceLocation Loc, 1790 LookupNameKind NameKind, 1791 RedeclarationKind Redecl 1792 = NotForRedeclaration); 1793 bool LookupName(LookupResult &R, Scope *S, 1794 bool AllowBuiltinCreation = false); 1795 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1796 bool InUnqualifiedLookup = false); 1797 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1798 bool AllowBuiltinCreation = false, 1799 bool EnteringContext = false); 1800 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1801 RedeclarationKind Redecl 1802 = NotForRedeclaration); 1803 1804 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1805 QualType T1, QualType T2, 1806 UnresolvedSetImpl &Functions); 1807 1808 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1809 SourceLocation GnuLabelLoc = SourceLocation()); 1810 1811 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1812 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1813 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1814 unsigned Quals, 1815 bool *ConstParam = 0); 1816 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1817 bool RValueThis, unsigned ThisQuals, 1818 bool *ConstParam = 0); 1819 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1820 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1821 unsigned ThisQuals); 1822 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1823 1824 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1825 Expr **Args, unsigned NumArgs, 1826 ADLResult &Functions, 1827 bool StdNamespaceIsAssociated = false); 1828 1829 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1830 VisibleDeclConsumer &Consumer, 1831 bool IncludeGlobalScope = true); 1832 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1833 VisibleDeclConsumer &Consumer, 1834 bool IncludeGlobalScope = true); 1835 1836 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1837 Sema::LookupNameKind LookupKind, 1838 Scope *S, CXXScopeSpec *SS, 1839 CorrectionCandidateCallback *CCC, 1840 DeclContext *MemberContext = 0, 1841 bool EnteringContext = false, 1842 const ObjCObjectPointerType *OPT = 0); 1843 1844 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1845 AssociatedNamespaceSet &AssociatedNamespaces, 1846 AssociatedClassSet &AssociatedClasses); 1847 1848 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1849 bool ConsiderLinkage, 1850 bool ExplicitInstantiationOrSpecialization); 1851 1852 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1853 //@} 1854 1855 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1856 SourceLocation IdLoc, 1857 bool TypoCorrection = false); 1858 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1859 Scope *S, bool ForRedeclaration, 1860 SourceLocation Loc); 1861 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1862 Scope *S); 1863 void AddKnownFunctionAttributes(FunctionDecl *FD); 1864 1865 // More parsing and symbol table subroutines. 1866 1867 // Decl attributes - this routine is the top level dispatcher. 1868 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1869 bool NonInheritable = true, bool Inheritable = true); 1870 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1871 bool NonInheritable = true, bool Inheritable = true); 1872 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1873 const AttributeList *AttrList); 1874 1875 void checkUnusedDeclAttributes(Declarator &D); 1876 1877 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1878 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1879 bool CheckNoReturnAttr(const AttributeList &attr); 1880 1881 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1882 bool &IncompleteImpl, unsigned DiagID); 1883 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1884 ObjCMethodDecl *MethodDecl, 1885 bool IsProtocolMethodDecl); 1886 1887 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1888 ObjCMethodDecl *Overridden, 1889 bool IsProtocolMethodDecl); 1890 1891 /// WarnExactTypedMethods - This routine issues a warning if method 1892 /// implementation declaration matches exactly that of its declaration. 1893 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1894 ObjCMethodDecl *MethodDecl, 1895 bool IsProtocolMethodDecl); 1896 1897 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1898 ObjCInterfaceDecl *IDecl); 1899 1900 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1901 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1902 1903 /// CheckProtocolMethodDefs - This routine checks unimplemented 1904 /// methods declared in protocol, and those referenced by it. 1905 /// \param IDecl - Used for checking for methods which may have been 1906 /// inherited. 1907 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1908 ObjCProtocolDecl *PDecl, 1909 bool& IncompleteImpl, 1910 const SelectorSet &InsMap, 1911 const SelectorSet &ClsMap, 1912 ObjCContainerDecl *CDecl); 1913 1914 /// CheckImplementationIvars - This routine checks if the instance variables 1915 /// listed in the implelementation match those listed in the interface. 1916 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1917 ObjCIvarDecl **Fields, unsigned nIvars, 1918 SourceLocation Loc); 1919 1920 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1921 /// remains unimplemented in the class or category @implementation. 1922 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1923 ObjCContainerDecl* IDecl, 1924 bool IncompleteImpl = false); 1925 1926 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1927 /// which must be implemented by this implementation. 1928 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1929 ObjCContainerDecl *CDecl, 1930 const SelectorSet &InsMap); 1931 1932 /// DefaultSynthesizeProperties - This routine default synthesizes all 1933 /// properties which must be synthesized in class's @implementation. 1934 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1935 ObjCInterfaceDecl *IDecl); 1936 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1937 1938 /// CollectImmediateProperties - This routine collects all properties in 1939 /// the class and its conforming protocols; but not those it its super class. 1940 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1941 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1942 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1943 1944 1945 /// LookupPropertyDecl - Looks up a property in the current class and all 1946 /// its protocols. 1947 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1948 IdentifierInfo *II); 1949 1950 /// Called by ActOnProperty to handle @property declarations in 1951 //// class extensions. 1952 Decl *HandlePropertyInClassExtension(Scope *S, 1953 SourceLocation AtLoc, 1954 FieldDeclarator &FD, 1955 Selector GetterSel, 1956 Selector SetterSel, 1957 const bool isAssign, 1958 const bool isReadWrite, 1959 const unsigned Attributes, 1960 const unsigned AttributesAsWritten, 1961 bool *isOverridingProperty, 1962 TypeSourceInfo *T, 1963 tok::ObjCKeywordKind MethodImplKind); 1964 1965 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1966 /// handle creating the ObjcPropertyDecl for a category or @interface. 1967 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1968 ObjCContainerDecl *CDecl, 1969 SourceLocation AtLoc, 1970 FieldDeclarator &FD, 1971 Selector GetterSel, 1972 Selector SetterSel, 1973 const bool isAssign, 1974 const bool isReadWrite, 1975 const unsigned Attributes, 1976 const unsigned AttributesAsWritten, 1977 TypeSourceInfo *T, 1978 tok::ObjCKeywordKind MethodImplKind, 1979 DeclContext *lexicalDC = 0); 1980 1981 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1982 /// warning) when atomic property has one but not the other user-declared 1983 /// setter or getter. 1984 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1985 ObjCContainerDecl* IDecl); 1986 1987 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1988 1989 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1990 1991 enum MethodMatchStrategy { 1992 MMS_loose, 1993 MMS_strict 1994 }; 1995 1996 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1997 /// true, or false, accordingly. 1998 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1999 const ObjCMethodDecl *PrevMethod, 2000 MethodMatchStrategy strategy = MMS_strict); 2001 2002 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2003 /// or protocol against those declared in their implementations. 2004 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2005 const SelectorSet &ClsMap, 2006 SelectorSet &InsMapSeen, 2007 SelectorSet &ClsMapSeen, 2008 ObjCImplDecl* IMPDecl, 2009 ObjCContainerDecl* IDecl, 2010 bool &IncompleteImpl, 2011 bool ImmediateClass, 2012 bool WarnExactMatch=false); 2013 2014 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2015 /// category matches with those implemented in its primary class and 2016 /// warns each time an exact match is found. 2017 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2018 2019private: 2020 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2021 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2022 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2023 2024 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2025 /// optionally warns if there are multiple signatures. 2026 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2027 bool receiverIdOrClass, 2028 bool warn, bool instance); 2029 2030public: 2031 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2032 /// unit are added to a global pool. This allows us to efficiently associate 2033 /// a selector with a method declaraation for purposes of typechecking 2034 /// messages sent to "id" (where the class of the object is unknown). 2035 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2036 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2037 } 2038 2039 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2040 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2041 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2042 } 2043 2044 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2045 /// pool. 2046 void AddAnyMethodToGlobalPool(Decl *D); 2047 2048 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2049 /// there are multiple signatures. 2050 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2051 bool receiverIdOrClass=false, 2052 bool warn=true) { 2053 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2054 warn, /*instance*/true); 2055 } 2056 2057 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2058 /// there are multiple signatures. 2059 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2060 bool receiverIdOrClass=false, 2061 bool warn=true) { 2062 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2063 warn, /*instance*/false); 2064 } 2065 2066 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2067 /// implementation. 2068 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2069 2070 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2071 /// initialization. 2072 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2073 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2074 2075 //===--------------------------------------------------------------------===// 2076 // Statement Parsing Callbacks: SemaStmt.cpp. 2077public: 2078 class FullExprArg { 2079 public: 2080 FullExprArg(Sema &actions) : E(0) { } 2081 2082 // FIXME: The const_cast here is ugly. RValue references would make this 2083 // much nicer (or we could duplicate a bunch of the move semantics 2084 // emulation code from Ownership.h). 2085 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2086 2087 ExprResult release() { 2088 return move(E); 2089 } 2090 2091 Expr *get() const { return E; } 2092 2093 Expr *operator->() { 2094 return E; 2095 } 2096 2097 private: 2098 // FIXME: No need to make the entire Sema class a friend when it's just 2099 // Sema::MakeFullExpr that needs access to the constructor below. 2100 friend class Sema; 2101 2102 explicit FullExprArg(Expr *expr) : E(expr) {} 2103 2104 Expr *E; 2105 }; 2106 2107 FullExprArg MakeFullExpr(Expr *Arg) { 2108 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2109 } 2110 2111 StmtResult ActOnExprStmt(FullExprArg Expr); 2112 2113 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2114 bool HasLeadingEmptyMacro = false); 2115 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2116 MultiStmtArg Elts, 2117 bool isStmtExpr); 2118 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2119 SourceLocation StartLoc, 2120 SourceLocation EndLoc); 2121 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2122 StmtResult ActOnForEachLValueExpr(Expr *E); 2123 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2124 SourceLocation DotDotDotLoc, Expr *RHSVal, 2125 SourceLocation ColonLoc); 2126 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2127 2128 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2129 SourceLocation ColonLoc, 2130 Stmt *SubStmt, Scope *CurScope); 2131 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2132 SourceLocation ColonLoc, Stmt *SubStmt); 2133 2134 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2135 FullExprArg CondVal, Decl *CondVar, 2136 Stmt *ThenVal, 2137 SourceLocation ElseLoc, Stmt *ElseVal); 2138 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2139 Expr *Cond, 2140 Decl *CondVar); 2141 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2142 Stmt *Switch, Stmt *Body); 2143 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2144 FullExprArg Cond, 2145 Decl *CondVar, Stmt *Body); 2146 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2147 SourceLocation WhileLoc, 2148 SourceLocation CondLParen, Expr *Cond, 2149 SourceLocation CondRParen); 2150 2151 StmtResult ActOnForStmt(SourceLocation ForLoc, 2152 SourceLocation LParenLoc, 2153 Stmt *First, FullExprArg Second, 2154 Decl *SecondVar, 2155 FullExprArg Third, 2156 SourceLocation RParenLoc, 2157 Stmt *Body); 2158 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2159 Expr *collection); 2160 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2161 SourceLocation LParenLoc, 2162 Stmt *First, Expr *Second, 2163 SourceLocation RParenLoc, Stmt *Body); 2164 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2165 SourceLocation LParenLoc, Stmt *LoopVar, 2166 SourceLocation ColonLoc, Expr *Collection, 2167 SourceLocation RParenLoc); 2168 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2169 SourceLocation ColonLoc, 2170 Stmt *RangeDecl, Stmt *BeginEndDecl, 2171 Expr *Cond, Expr *Inc, 2172 Stmt *LoopVarDecl, 2173 SourceLocation RParenLoc); 2174 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2175 2176 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2177 SourceLocation LabelLoc, 2178 LabelDecl *TheDecl); 2179 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2180 SourceLocation StarLoc, 2181 Expr *DestExp); 2182 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2183 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2184 2185 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2186 bool AllowFunctionParameters); 2187 2188 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2189 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2190 2191 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2192 bool IsSimple, bool IsVolatile, 2193 unsigned NumOutputs, unsigned NumInputs, 2194 IdentifierInfo **Names, 2195 MultiExprArg Constraints, 2196 MultiExprArg Exprs, 2197 Expr *AsmString, 2198 MultiExprArg Clobbers, 2199 SourceLocation RParenLoc, 2200 bool MSAsm = false); 2201 2202 2203 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2204 SourceLocation StartLoc, 2205 SourceLocation IdLoc, IdentifierInfo *Id, 2206 bool Invalid = false); 2207 2208 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2209 2210 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2211 Decl *Parm, Stmt *Body); 2212 2213 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2214 2215 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2216 MultiStmtArg Catch, Stmt *Finally); 2217 2218 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2219 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2220 Scope *CurScope); 2221 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2222 Expr *operand); 2223 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2224 Expr *SynchExpr, 2225 Stmt *SynchBody); 2226 2227 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2228 2229 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2230 SourceLocation StartLoc, 2231 SourceLocation IdLoc, 2232 IdentifierInfo *Id); 2233 2234 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2235 2236 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2237 Decl *ExDecl, Stmt *HandlerBlock); 2238 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2239 MultiStmtArg Handlers); 2240 2241 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2242 SourceLocation TryLoc, 2243 Stmt *TryBlock, 2244 Stmt *Handler); 2245 2246 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2247 Expr *FilterExpr, 2248 Stmt *Block); 2249 2250 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2251 Stmt *Block); 2252 2253 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2254 2255 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2256 2257 /// \brief If it's a file scoped decl that must warn if not used, keep track 2258 /// of it. 2259 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2260 2261 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2262 /// whose result is unused, warn. 2263 void DiagnoseUnusedExprResult(const Stmt *S); 2264 void DiagnoseUnusedDecl(const NamedDecl *ND); 2265 2266 ParsingDeclState PushParsingDeclaration() { 2267 return DelayedDiagnostics.pushParsingDecl(); 2268 } 2269 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2270 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2271 } 2272 2273 typedef ProcessingContextState ParsingClassState; 2274 ParsingClassState PushParsingClass() { 2275 return DelayedDiagnostics.pushContext(); 2276 } 2277 void PopParsingClass(ParsingClassState state) { 2278 DelayedDiagnostics.popContext(state); 2279 } 2280 2281 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2282 SourceLocation Loc, 2283 const ObjCInterfaceDecl *UnknownObjCClass=0); 2284 2285 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2286 2287 bool makeUnavailableInSystemHeader(SourceLocation loc, 2288 StringRef message); 2289 2290 //===--------------------------------------------------------------------===// 2291 // Expression Parsing Callbacks: SemaExpr.cpp. 2292 2293 bool CanUseDecl(NamedDecl *D); 2294 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2295 const ObjCInterfaceDecl *UnknownObjCClass=0); 2296 AvailabilityResult DiagnoseAvailabilityOfDecl(NamedDecl *D, 2297 SourceLocation Loc, 2298 const ObjCInterfaceDecl *UnknownObjCClass); 2299 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2300 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2301 ObjCMethodDecl *Getter, 2302 SourceLocation Loc); 2303 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2304 Expr **Args, unsigned NumArgs); 2305 2306 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2307 2308 void PopExpressionEvaluationContext(); 2309 2310 void DiscardCleanupsInEvaluationContext(); 2311 2312 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2313 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2314 void MarkDeclarationsReferencedInExpr(Expr *E); 2315 2316 /// \brief Try to recover by turning the given expression into a 2317 /// call. Returns true if recovery was attempted or an error was 2318 /// emitted; this may also leave the ExprResult invalid. 2319 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2320 bool ForceComplain = false, 2321 bool (*IsPlausibleResult)(QualType) = 0); 2322 2323 /// \brief Figure out if an expression could be turned into a call. 2324 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2325 UnresolvedSetImpl &NonTemplateOverloads); 2326 2327 /// \brief Conditionally issue a diagnostic based on the current 2328 /// evaluation context. 2329 /// 2330 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2331 /// the function body is parsed, and then do a basic reachability analysis to 2332 /// determine if the statement is reachable. If it is unreachable, the 2333 /// diagnostic will not be emitted. 2334 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2335 const PartialDiagnostic &PD); 2336 2337 // Primary Expressions. 2338 SourceRange getExprRange(Expr *E) const; 2339 2340 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2341 bool HasTrailingLParen, bool IsAddressOfOperand); 2342 2343 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2344 TemplateArgumentListInfo &Buffer, 2345 DeclarationNameInfo &NameInfo, 2346 const TemplateArgumentListInfo *&TemplateArgs); 2347 2348 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2349 CorrectionCandidateCallback &CCC, 2350 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2351 Expr **Args = 0, unsigned NumArgs = 0); 2352 2353 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2354 IdentifierInfo *II, 2355 bool AllowBuiltinCreation=false); 2356 2357 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2358 const DeclarationNameInfo &NameInfo, 2359 bool isAddressOfOperand, 2360 const TemplateArgumentListInfo *TemplateArgs); 2361 2362 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2363 ExprValueKind VK, 2364 SourceLocation Loc, 2365 const CXXScopeSpec *SS = 0); 2366 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2367 ExprValueKind VK, 2368 const DeclarationNameInfo &NameInfo, 2369 const CXXScopeSpec *SS = 0); 2370 ExprResult 2371 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2372 SourceLocation nameLoc, 2373 IndirectFieldDecl *indirectField, 2374 Expr *baseObjectExpr = 0, 2375 SourceLocation opLoc = SourceLocation()); 2376 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2377 LookupResult &R, 2378 const TemplateArgumentListInfo *TemplateArgs); 2379 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2380 LookupResult &R, 2381 const TemplateArgumentListInfo *TemplateArgs, 2382 bool IsDefiniteInstance); 2383 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2384 const LookupResult &R, 2385 bool HasTrailingLParen); 2386 2387 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2388 const DeclarationNameInfo &NameInfo); 2389 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2390 const DeclarationNameInfo &NameInfo, 2391 const TemplateArgumentListInfo *TemplateArgs); 2392 2393 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2394 LookupResult &R, 2395 bool NeedsADL); 2396 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2397 const DeclarationNameInfo &NameInfo, 2398 NamedDecl *D); 2399 2400 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2401 ExprResult ActOnNumericConstant(const Token &Tok); 2402 ExprResult ActOnCharacterConstant(const Token &Tok); 2403 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2404 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2405 SourceLocation R, 2406 MultiExprArg Val); 2407 2408 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2409 /// fragments (e.g. "foo" "bar" L"baz"). 2410 ExprResult ActOnStringLiteral(const Token *StringToks, 2411 unsigned NumStringToks); 2412 2413 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2414 SourceLocation DefaultLoc, 2415 SourceLocation RParenLoc, 2416 Expr *ControllingExpr, 2417 MultiTypeArg ArgTypes, 2418 MultiExprArg ArgExprs); 2419 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2420 SourceLocation DefaultLoc, 2421 SourceLocation RParenLoc, 2422 Expr *ControllingExpr, 2423 TypeSourceInfo **Types, 2424 Expr **Exprs, 2425 unsigned NumAssocs); 2426 2427 // Binary/Unary Operators. 'Tok' is the token for the operator. 2428 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2429 Expr *InputExpr); 2430 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2431 UnaryOperatorKind Opc, Expr *Input); 2432 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2433 tok::TokenKind Op, Expr *Input); 2434 2435 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2436 SourceLocation OpLoc, 2437 UnaryExprOrTypeTrait ExprKind, 2438 SourceRange R); 2439 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2440 UnaryExprOrTypeTrait ExprKind); 2441 ExprResult 2442 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2443 UnaryExprOrTypeTrait ExprKind, 2444 bool IsType, void *TyOrEx, 2445 const SourceRange &ArgRange); 2446 2447 ExprResult CheckPlaceholderExpr(Expr *E); 2448 bool CheckVecStepExpr(Expr *E); 2449 2450 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2451 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2452 SourceRange ExprRange, 2453 UnaryExprOrTypeTrait ExprKind); 2454 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2455 SourceLocation OpLoc, 2456 IdentifierInfo &Name, 2457 SourceLocation NameLoc, 2458 SourceLocation RParenLoc); 2459 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2460 tok::TokenKind Kind, Expr *Input); 2461 2462 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2463 Expr *Idx, SourceLocation RLoc); 2464 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2465 Expr *Idx, SourceLocation RLoc); 2466 2467 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2468 SourceLocation OpLoc, bool IsArrow, 2469 CXXScopeSpec &SS, 2470 NamedDecl *FirstQualifierInScope, 2471 const DeclarationNameInfo &NameInfo, 2472 const TemplateArgumentListInfo *TemplateArgs); 2473 2474 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2475 SourceLocation OpLoc, bool IsArrow, 2476 const CXXScopeSpec &SS, 2477 NamedDecl *FirstQualifierInScope, 2478 LookupResult &R, 2479 const TemplateArgumentListInfo *TemplateArgs, 2480 bool SuppressQualifierCheck = false); 2481 2482 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2483 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2484 bool &IsArrow, SourceLocation OpLoc, 2485 CXXScopeSpec &SS, 2486 Decl *ObjCImpDecl, 2487 bool HasTemplateArgs); 2488 2489 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2490 const CXXScopeSpec &SS, 2491 const LookupResult &R); 2492 2493 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2494 bool IsArrow, SourceLocation OpLoc, 2495 const CXXScopeSpec &SS, 2496 NamedDecl *FirstQualifierInScope, 2497 const DeclarationNameInfo &NameInfo, 2498 const TemplateArgumentListInfo *TemplateArgs); 2499 2500 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2501 SourceLocation OpLoc, 2502 tok::TokenKind OpKind, 2503 CXXScopeSpec &SS, 2504 UnqualifiedId &Member, 2505 Decl *ObjCImpDecl, 2506 bool HasTrailingLParen); 2507 2508 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2509 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2510 FunctionDecl *FDecl, 2511 const FunctionProtoType *Proto, 2512 Expr **Args, unsigned NumArgs, 2513 SourceLocation RParenLoc, 2514 bool ExecConfig = false); 2515 void CheckStaticArrayArgument(SourceLocation CallLoc, 2516 ParmVarDecl *Param, 2517 const Expr *ArgExpr); 2518 2519 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2520 /// This provides the location of the left/right parens and a list of comma 2521 /// locations. 2522 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2523 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2524 Expr *ExecConfig = 0, bool IsExecConfig = false); 2525 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2526 SourceLocation LParenLoc, 2527 Expr **Args, unsigned NumArgs, 2528 SourceLocation RParenLoc, 2529 Expr *Config = 0, 2530 bool IsExecConfig = false); 2531 2532 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2533 MultiExprArg ExecConfig, 2534 SourceLocation GGGLoc); 2535 2536 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2537 Declarator &D, ParsedType &Ty, 2538 SourceLocation RParenLoc, Expr *CastExpr); 2539 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2540 TypeSourceInfo *Ty, 2541 SourceLocation RParenLoc, 2542 Expr *Op); 2543 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2544 2545 /// \brief Build an altivec or OpenCL literal. 2546 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2547 SourceLocation RParenLoc, Expr *E, 2548 TypeSourceInfo *TInfo); 2549 2550 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2551 2552 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2553 ParsedType Ty, 2554 SourceLocation RParenLoc, 2555 Expr *InitExpr); 2556 2557 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2558 TypeSourceInfo *TInfo, 2559 SourceLocation RParenLoc, 2560 Expr *LiteralExpr); 2561 2562 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2563 MultiExprArg InitArgList, 2564 SourceLocation RBraceLoc); 2565 2566 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2567 SourceLocation Loc, 2568 bool GNUSyntax, 2569 ExprResult Init); 2570 2571 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2572 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2573 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2574 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2575 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2576 Expr *LHSExpr, Expr *RHSExpr); 2577 2578 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2579 /// in the case of a the GNU conditional expr extension. 2580 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2581 SourceLocation ColonLoc, 2582 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2583 2584 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2585 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2586 LabelDecl *TheDecl); 2587 2588 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2589 SourceLocation RPLoc); // "({..})" 2590 2591 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2592 struct OffsetOfComponent { 2593 SourceLocation LocStart, LocEnd; 2594 bool isBrackets; // true if [expr], false if .ident 2595 union { 2596 IdentifierInfo *IdentInfo; 2597 Expr *E; 2598 } U; 2599 }; 2600 2601 /// __builtin_offsetof(type, a.b[123][456].c) 2602 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2603 TypeSourceInfo *TInfo, 2604 OffsetOfComponent *CompPtr, 2605 unsigned NumComponents, 2606 SourceLocation RParenLoc); 2607 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2608 SourceLocation BuiltinLoc, 2609 SourceLocation TypeLoc, 2610 ParsedType ParsedArgTy, 2611 OffsetOfComponent *CompPtr, 2612 unsigned NumComponents, 2613 SourceLocation RParenLoc); 2614 2615 // __builtin_choose_expr(constExpr, expr1, expr2) 2616 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2617 Expr *CondExpr, Expr *LHSExpr, 2618 Expr *RHSExpr, SourceLocation RPLoc); 2619 2620 // __builtin_va_arg(expr, type) 2621 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2622 SourceLocation RPLoc); 2623 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2624 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2625 2626 // __null 2627 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2628 2629 bool CheckCaseExpression(Expr *E); 2630 2631 /// \brief Describes the result of an "if-exists" condition check. 2632 enum IfExistsResult { 2633 /// \brief The symbol exists. 2634 IER_Exists, 2635 2636 /// \brief The symbol does not exist. 2637 IER_DoesNotExist, 2638 2639 /// \brief The name is a dependent name, so the results will differ 2640 /// from one instantiation to the next. 2641 IER_Dependent, 2642 2643 /// \brief An error occurred. 2644 IER_Error 2645 }; 2646 2647 IfExistsResult 2648 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2649 const DeclarationNameInfo &TargetNameInfo); 2650 2651 IfExistsResult 2652 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2653 bool IsIfExists, CXXScopeSpec &SS, 2654 UnqualifiedId &Name); 2655 2656 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2657 bool IsIfExists, 2658 NestedNameSpecifierLoc QualifierLoc, 2659 DeclarationNameInfo NameInfo, 2660 Stmt *Nested); 2661 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2662 bool IsIfExists, 2663 CXXScopeSpec &SS, UnqualifiedId &Name, 2664 Stmt *Nested); 2665 2666 //===------------------------- "Block" Extension ------------------------===// 2667 2668 /// ActOnBlockStart - This callback is invoked when a block literal is 2669 /// started. 2670 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2671 2672 /// ActOnBlockArguments - This callback allows processing of block arguments. 2673 /// If there are no arguments, this is still invoked. 2674 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2675 2676 /// ActOnBlockError - If there is an error parsing a block, this callback 2677 /// is invoked to pop the information about the block from the action impl. 2678 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2679 2680 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2681 /// literal was successfully completed. ^(int x){...} 2682 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2683 Scope *CurScope); 2684 2685 //===---------------------------- OpenCL Features -----------------------===// 2686 2687 /// __builtin_astype(...) 2688 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2689 SourceLocation BuiltinLoc, 2690 SourceLocation RParenLoc); 2691 2692 //===---------------------------- C++ Features --------------------------===// 2693 2694 // Act on C++ namespaces 2695 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2696 SourceLocation NamespaceLoc, 2697 SourceLocation IdentLoc, 2698 IdentifierInfo *Ident, 2699 SourceLocation LBrace, 2700 AttributeList *AttrList); 2701 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2702 2703 NamespaceDecl *getStdNamespace() const; 2704 NamespaceDecl *getOrCreateStdNamespace(); 2705 2706 CXXRecordDecl *getStdBadAlloc() const; 2707 2708 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2709 /// it is and Element is not NULL, assigns the element type to Element. 2710 bool isStdInitializerList(QualType Ty, QualType *Element); 2711 2712 /// \brief Looks for the std::initializer_list template and instantiates it 2713 /// with Element, or emits an error if it's not found. 2714 /// 2715 /// \returns The instantiated template, or null on error. 2716 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2717 2718 /// \brief Determine whether Ctor is an initializer-list constructor, as 2719 /// defined in [dcl.init.list]p2. 2720 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2721 2722 Decl *ActOnUsingDirective(Scope *CurScope, 2723 SourceLocation UsingLoc, 2724 SourceLocation NamespcLoc, 2725 CXXScopeSpec &SS, 2726 SourceLocation IdentLoc, 2727 IdentifierInfo *NamespcName, 2728 AttributeList *AttrList); 2729 2730 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2731 2732 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2733 SourceLocation NamespaceLoc, 2734 SourceLocation AliasLoc, 2735 IdentifierInfo *Alias, 2736 CXXScopeSpec &SS, 2737 SourceLocation IdentLoc, 2738 IdentifierInfo *Ident); 2739 2740 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2741 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2742 const LookupResult &PreviousDecls); 2743 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2744 NamedDecl *Target); 2745 2746 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2747 bool isTypeName, 2748 const CXXScopeSpec &SS, 2749 SourceLocation NameLoc, 2750 const LookupResult &Previous); 2751 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2752 const CXXScopeSpec &SS, 2753 SourceLocation NameLoc); 2754 2755 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2756 SourceLocation UsingLoc, 2757 CXXScopeSpec &SS, 2758 const DeclarationNameInfo &NameInfo, 2759 AttributeList *AttrList, 2760 bool IsInstantiation, 2761 bool IsTypeName, 2762 SourceLocation TypenameLoc); 2763 2764 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2765 2766 Decl *ActOnUsingDeclaration(Scope *CurScope, 2767 AccessSpecifier AS, 2768 bool HasUsingKeyword, 2769 SourceLocation UsingLoc, 2770 CXXScopeSpec &SS, 2771 UnqualifiedId &Name, 2772 AttributeList *AttrList, 2773 bool IsTypeName, 2774 SourceLocation TypenameLoc); 2775 Decl *ActOnAliasDeclaration(Scope *CurScope, 2776 AccessSpecifier AS, 2777 MultiTemplateParamsArg TemplateParams, 2778 SourceLocation UsingLoc, 2779 UnqualifiedId &Name, 2780 TypeResult Type); 2781 2782 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2783 /// ActOnDeclarator, when a C++ direct initializer is present. 2784 /// e.g: "int x(1);" 2785 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2786 SourceLocation LParenLoc, 2787 MultiExprArg Exprs, 2788 SourceLocation RParenLoc, 2789 bool TypeMayContainAuto); 2790 2791 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2792 /// and sets it as the initializer for the the passed in VarDecl. 2793 bool InitializeVarWithConstructor(VarDecl *VD, 2794 CXXConstructorDecl *Constructor, 2795 MultiExprArg Exprs, 2796 bool HadMultipleCandidates); 2797 2798 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2799 /// including handling of its default argument expressions. 2800 /// 2801 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2802 ExprResult 2803 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2804 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2805 bool HadMultipleCandidates, bool RequiresZeroInit, 2806 unsigned ConstructKind, SourceRange ParenRange); 2807 2808 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2809 // the constructor can be elidable? 2810 ExprResult 2811 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2812 CXXConstructorDecl *Constructor, bool Elidable, 2813 MultiExprArg Exprs, bool HadMultipleCandidates, 2814 bool RequiresZeroInit, unsigned ConstructKind, 2815 SourceRange ParenRange); 2816 2817 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2818 /// the default expr if needed. 2819 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2820 FunctionDecl *FD, 2821 ParmVarDecl *Param); 2822 2823 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2824 /// constructed variable. 2825 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2826 2827 /// \brief Helper class that collects exception specifications for 2828 /// implicitly-declared special member functions. 2829 class ImplicitExceptionSpecification { 2830 // Pointer to allow copying 2831 ASTContext *Context; 2832 // We order exception specifications thus: 2833 // noexcept is the most restrictive, but is only used in C++0x. 2834 // throw() comes next. 2835 // Then a throw(collected exceptions) 2836 // Finally no specification. 2837 // throw(...) is used instead if any called function uses it. 2838 // 2839 // If this exception specification cannot be known yet (for instance, 2840 // because this is the exception specification for a defaulted default 2841 // constructor and we haven't finished parsing the deferred parts of the 2842 // class yet), the C++0x standard does not specify how to behave. We 2843 // record this as an 'unknown' exception specification, which overrules 2844 // any other specification (even 'none', to keep this rule simple). 2845 ExceptionSpecificationType ComputedEST; 2846 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2847 SmallVector<QualType, 4> Exceptions; 2848 2849 void ClearExceptions() { 2850 ExceptionsSeen.clear(); 2851 Exceptions.clear(); 2852 } 2853 2854 public: 2855 explicit ImplicitExceptionSpecification(ASTContext &Context) 2856 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2857 if (!Context.getLangOptions().CPlusPlus0x) 2858 ComputedEST = EST_DynamicNone; 2859 } 2860 2861 /// \brief Get the computed exception specification type. 2862 ExceptionSpecificationType getExceptionSpecType() const { 2863 assert(ComputedEST != EST_ComputedNoexcept && 2864 "noexcept(expr) should not be a possible result"); 2865 return ComputedEST; 2866 } 2867 2868 /// \brief The number of exceptions in the exception specification. 2869 unsigned size() const { return Exceptions.size(); } 2870 2871 /// \brief The set of exceptions in the exception specification. 2872 const QualType *data() const { return Exceptions.data(); } 2873 2874 /// \brief Integrate another called method into the collected data. 2875 void CalledDecl(CXXMethodDecl *Method); 2876 2877 /// \brief Integrate an invoked expression into the collected data. 2878 void CalledExpr(Expr *E); 2879 2880 /// \brief Specify that the exception specification can't be detemined yet. 2881 void SetDelayed() { 2882 ClearExceptions(); 2883 ComputedEST = EST_Delayed; 2884 } 2885 2886 FunctionProtoType::ExtProtoInfo getEPI() const { 2887 FunctionProtoType::ExtProtoInfo EPI; 2888 EPI.ExceptionSpecType = getExceptionSpecType(); 2889 EPI.NumExceptions = size(); 2890 EPI.Exceptions = data(); 2891 return EPI; 2892 } 2893 }; 2894 2895 /// \brief Determine what sort of exception specification a defaulted 2896 /// copy constructor of a class will have. 2897 ImplicitExceptionSpecification 2898 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2899 2900 /// \brief Determine what sort of exception specification a defaulted 2901 /// default constructor of a class will have, and whether the parameter 2902 /// will be const. 2903 std::pair<ImplicitExceptionSpecification, bool> 2904 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2905 2906 /// \brief Determine what sort of exception specification a defautled 2907 /// copy assignment operator of a class will have, and whether the 2908 /// parameter will be const. 2909 std::pair<ImplicitExceptionSpecification, bool> 2910 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2911 2912 /// \brief Determine what sort of exception specification a defaulted move 2913 /// constructor of a class will have. 2914 ImplicitExceptionSpecification 2915 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2916 2917 /// \brief Determine what sort of exception specification a defaulted move 2918 /// assignment operator of a class will have. 2919 ImplicitExceptionSpecification 2920 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2921 2922 /// \brief Determine what sort of exception specification a defaulted 2923 /// destructor of a class will have. 2924 ImplicitExceptionSpecification 2925 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2926 2927 /// \brief Determine if a special member function should have a deleted 2928 /// definition when it is defaulted. 2929 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2930 2931 /// \brief Determine if a defaulted copy assignment operator ought to be 2932 /// deleted. 2933 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2934 2935 /// \brief Determine if a defaulted move assignment operator ought to be 2936 /// deleted. 2937 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2938 2939 /// \brief Determine if a defaulted destructor ought to be deleted. 2940 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2941 2942 /// \brief Declare the implicit default constructor for the given class. 2943 /// 2944 /// \param ClassDecl The class declaration into which the implicit 2945 /// default constructor will be added. 2946 /// 2947 /// \returns The implicitly-declared default constructor. 2948 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2949 CXXRecordDecl *ClassDecl); 2950 2951 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2952 /// defining this constructor as the default constructor. 2953 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2954 CXXConstructorDecl *Constructor); 2955 2956 /// \brief Declare the implicit destructor for the given class. 2957 /// 2958 /// \param ClassDecl The class declaration into which the implicit 2959 /// destructor will be added. 2960 /// 2961 /// \returns The implicitly-declared destructor. 2962 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2963 2964 /// DefineImplicitDestructor - Checks for feasibility of 2965 /// defining this destructor as the default destructor. 2966 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2967 CXXDestructorDecl *Destructor); 2968 2969 /// \brief Build an exception spec for destructors that don't have one. 2970 /// 2971 /// C++11 says that user-defined destructors with no exception spec get one 2972 /// that looks as if the destructor was implicitly declared. 2973 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2974 CXXDestructorDecl *Destructor); 2975 2976 /// \brief Declare all inherited constructors for the given class. 2977 /// 2978 /// \param ClassDecl The class declaration into which the inherited 2979 /// constructors will be added. 2980 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2981 2982 /// \brief Declare the implicit copy constructor for the given class. 2983 /// 2984 /// \param ClassDecl The class declaration into which the implicit 2985 /// copy constructor will be added. 2986 /// 2987 /// \returns The implicitly-declared copy constructor. 2988 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2989 2990 /// DefineImplicitCopyConstructor - Checks for feasibility of 2991 /// defining this constructor as the copy constructor. 2992 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2993 CXXConstructorDecl *Constructor); 2994 2995 /// \brief Declare the implicit move constructor for the given class. 2996 /// 2997 /// \param ClassDecl The Class declaration into which the implicit 2998 /// move constructor will be added. 2999 /// 3000 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3001 /// declared. 3002 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3003 3004 /// DefineImplicitMoveConstructor - Checks for feasibility of 3005 /// defining this constructor as the move constructor. 3006 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3007 CXXConstructorDecl *Constructor); 3008 3009 /// \brief Declare the implicit copy assignment operator for the given class. 3010 /// 3011 /// \param ClassDecl The class declaration into which the implicit 3012 /// copy assignment operator will be added. 3013 /// 3014 /// \returns The implicitly-declared copy assignment operator. 3015 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3016 3017 /// \brief Defines an implicitly-declared copy assignment operator. 3018 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3019 CXXMethodDecl *MethodDecl); 3020 3021 /// \brief Declare the implicit move assignment operator for the given class. 3022 /// 3023 /// \param ClassDecl The Class declaration into which the implicit 3024 /// move assignment operator will be added. 3025 /// 3026 /// \returns The implicitly-declared move assignment operator, or NULL if it 3027 /// wasn't declared. 3028 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3029 3030 /// \brief Defines an implicitly-declared move assignment operator. 3031 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3032 CXXMethodDecl *MethodDecl); 3033 3034 /// \brief Force the declaration of any implicitly-declared members of this 3035 /// class. 3036 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3037 3038 /// MaybeBindToTemporary - If the passed in expression has a record type with 3039 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3040 /// it simply returns the passed in expression. 3041 ExprResult MaybeBindToTemporary(Expr *E); 3042 3043 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3044 MultiExprArg ArgsPtr, 3045 SourceLocation Loc, 3046 ASTOwningVector<Expr*> &ConvertedArgs); 3047 3048 ParsedType getDestructorName(SourceLocation TildeLoc, 3049 IdentifierInfo &II, SourceLocation NameLoc, 3050 Scope *S, CXXScopeSpec &SS, 3051 ParsedType ObjectType, 3052 bool EnteringContext); 3053 3054 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3055 3056 // Checks that reinterpret casts don't have undefined behavior. 3057 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3058 bool IsDereference, SourceRange Range); 3059 3060 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3061 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3062 tok::TokenKind Kind, 3063 SourceLocation LAngleBracketLoc, 3064 Declarator &D, 3065 SourceLocation RAngleBracketLoc, 3066 SourceLocation LParenLoc, 3067 Expr *E, 3068 SourceLocation RParenLoc); 3069 3070 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3071 tok::TokenKind Kind, 3072 TypeSourceInfo *Ty, 3073 Expr *E, 3074 SourceRange AngleBrackets, 3075 SourceRange Parens); 3076 3077 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3078 SourceLocation TypeidLoc, 3079 TypeSourceInfo *Operand, 3080 SourceLocation RParenLoc); 3081 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3082 SourceLocation TypeidLoc, 3083 Expr *Operand, 3084 SourceLocation RParenLoc); 3085 3086 /// ActOnCXXTypeid - Parse typeid( something ). 3087 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3088 SourceLocation LParenLoc, bool isType, 3089 void *TyOrExpr, 3090 SourceLocation RParenLoc); 3091 3092 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3093 SourceLocation TypeidLoc, 3094 TypeSourceInfo *Operand, 3095 SourceLocation RParenLoc); 3096 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3097 SourceLocation TypeidLoc, 3098 Expr *Operand, 3099 SourceLocation RParenLoc); 3100 3101 /// ActOnCXXUuidof - Parse __uuidof( something ). 3102 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3103 SourceLocation LParenLoc, bool isType, 3104 void *TyOrExpr, 3105 SourceLocation RParenLoc); 3106 3107 3108 //// ActOnCXXThis - Parse 'this' pointer. 3109 ExprResult ActOnCXXThis(SourceLocation loc); 3110 3111 /// \brief Try to retrieve the type of the 'this' pointer. 3112 /// 3113 /// \param Capture If true, capture 'this' in this context. 3114 /// 3115 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3116 QualType getCurrentThisType(); 3117 3118 /// \brief Make sure the value of 'this' is actually available in the current 3119 /// context, if it is a potentially evaluated context. This check can be 3120 /// delayed in PotentiallyPotentiallyEvaluated contexts. 3121 void CheckCXXThisCapture(SourceLocation Loc); 3122 3123 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3124 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3125 3126 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3127 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3128 3129 //// ActOnCXXThrow - Parse throw expressions. 3130 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3131 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3132 bool IsThrownVarInScope); 3133 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3134 bool IsThrownVarInScope); 3135 3136 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3137 /// Can be interpreted either as function-style casting ("int(x)") 3138 /// or class type construction ("ClassType(x,y,z)") 3139 /// or creation of a value-initialized type ("int()"). 3140 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3141 SourceLocation LParenLoc, 3142 MultiExprArg Exprs, 3143 SourceLocation RParenLoc); 3144 3145 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3146 SourceLocation LParenLoc, 3147 MultiExprArg Exprs, 3148 SourceLocation RParenLoc); 3149 3150 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3151 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3152 SourceLocation PlacementLParen, 3153 MultiExprArg PlacementArgs, 3154 SourceLocation PlacementRParen, 3155 SourceRange TypeIdParens, Declarator &D, 3156 SourceLocation ConstructorLParen, 3157 MultiExprArg ConstructorArgs, 3158 SourceLocation ConstructorRParen); 3159 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3160 SourceLocation PlacementLParen, 3161 MultiExprArg PlacementArgs, 3162 SourceLocation PlacementRParen, 3163 SourceRange TypeIdParens, 3164 QualType AllocType, 3165 TypeSourceInfo *AllocTypeInfo, 3166 Expr *ArraySize, 3167 SourceLocation ConstructorLParen, 3168 MultiExprArg ConstructorArgs, 3169 SourceLocation ConstructorRParen, 3170 bool TypeMayContainAuto = true); 3171 3172 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3173 SourceRange R); 3174 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3175 bool UseGlobal, QualType AllocType, bool IsArray, 3176 Expr **PlaceArgs, unsigned NumPlaceArgs, 3177 FunctionDecl *&OperatorNew, 3178 FunctionDecl *&OperatorDelete); 3179 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3180 DeclarationName Name, Expr** Args, 3181 unsigned NumArgs, DeclContext *Ctx, 3182 bool AllowMissing, FunctionDecl *&Operator, 3183 bool Diagnose = true); 3184 void DeclareGlobalNewDelete(); 3185 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3186 QualType Argument, 3187 bool addMallocAttr = false); 3188 3189 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3190 DeclarationName Name, FunctionDecl* &Operator, 3191 bool Diagnose = true); 3192 3193 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3194 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3195 bool UseGlobal, bool ArrayForm, 3196 Expr *Operand); 3197 3198 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3199 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3200 SourceLocation StmtLoc, 3201 bool ConvertToBoolean); 3202 3203 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3204 Expr *Operand, SourceLocation RParen); 3205 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3206 SourceLocation RParen); 3207 3208 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3209 /// pseudo-functions. 3210 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3211 SourceLocation KWLoc, 3212 ParsedType Ty, 3213 SourceLocation RParen); 3214 3215 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3216 SourceLocation KWLoc, 3217 TypeSourceInfo *T, 3218 SourceLocation RParen); 3219 3220 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3221 /// pseudo-functions. 3222 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3223 SourceLocation KWLoc, 3224 ParsedType LhsTy, 3225 ParsedType RhsTy, 3226 SourceLocation RParen); 3227 3228 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3229 SourceLocation KWLoc, 3230 TypeSourceInfo *LhsT, 3231 TypeSourceInfo *RhsT, 3232 SourceLocation RParen); 3233 3234 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3235 /// pseudo-functions. 3236 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3237 SourceLocation KWLoc, 3238 ParsedType LhsTy, 3239 Expr *DimExpr, 3240 SourceLocation RParen); 3241 3242 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3243 SourceLocation KWLoc, 3244 TypeSourceInfo *TSInfo, 3245 Expr *DimExpr, 3246 SourceLocation RParen); 3247 3248 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3249 /// pseudo-functions. 3250 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3251 SourceLocation KWLoc, 3252 Expr *Queried, 3253 SourceLocation RParen); 3254 3255 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3256 SourceLocation KWLoc, 3257 Expr *Queried, 3258 SourceLocation RParen); 3259 3260 ExprResult ActOnStartCXXMemberReference(Scope *S, 3261 Expr *Base, 3262 SourceLocation OpLoc, 3263 tok::TokenKind OpKind, 3264 ParsedType &ObjectType, 3265 bool &MayBePseudoDestructor); 3266 3267 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3268 3269 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3270 SourceLocation OpLoc, 3271 tok::TokenKind OpKind, 3272 const CXXScopeSpec &SS, 3273 TypeSourceInfo *ScopeType, 3274 SourceLocation CCLoc, 3275 SourceLocation TildeLoc, 3276 PseudoDestructorTypeStorage DestroyedType, 3277 bool HasTrailingLParen); 3278 3279 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3280 SourceLocation OpLoc, 3281 tok::TokenKind OpKind, 3282 CXXScopeSpec &SS, 3283 UnqualifiedId &FirstTypeName, 3284 SourceLocation CCLoc, 3285 SourceLocation TildeLoc, 3286 UnqualifiedId &SecondTypeName, 3287 bool HasTrailingLParen); 3288 3289 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3290 SourceLocation OpLoc, 3291 tok::TokenKind OpKind, 3292 SourceLocation TildeLoc, 3293 const DeclSpec& DS, 3294 bool HasTrailingLParen); 3295 3296 /// MaybeCreateExprWithCleanups - If the current full-expression 3297 /// requires any cleanups, surround it with a ExprWithCleanups node. 3298 /// Otherwise, just returns the passed-in expression. 3299 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3300 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3301 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3302 3303 ExprResult ActOnFinishFullExpr(Expr *Expr); 3304 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3305 3306 // Marks SS invalid if it represents an incomplete type. 3307 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3308 3309 DeclContext *computeDeclContext(QualType T); 3310 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3311 bool EnteringContext = false); 3312 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3313 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3314 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3315 3316 /// \brief The parser has parsed a global nested-name-specifier '::'. 3317 /// 3318 /// \param S The scope in which this nested-name-specifier occurs. 3319 /// 3320 /// \param CCLoc The location of the '::'. 3321 /// 3322 /// \param SS The nested-name-specifier, which will be updated in-place 3323 /// to reflect the parsed nested-name-specifier. 3324 /// 3325 /// \returns true if an error occurred, false otherwise. 3326 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3327 CXXScopeSpec &SS); 3328 3329 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3330 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3331 3332 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3333 SourceLocation IdLoc, 3334 IdentifierInfo &II, 3335 ParsedType ObjectType); 3336 3337 bool BuildCXXNestedNameSpecifier(Scope *S, 3338 IdentifierInfo &Identifier, 3339 SourceLocation IdentifierLoc, 3340 SourceLocation CCLoc, 3341 QualType ObjectType, 3342 bool EnteringContext, 3343 CXXScopeSpec &SS, 3344 NamedDecl *ScopeLookupResult, 3345 bool ErrorRecoveryLookup); 3346 3347 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3348 /// 3349 /// \param S The scope in which this nested-name-specifier occurs. 3350 /// 3351 /// \param Identifier The identifier preceding the '::'. 3352 /// 3353 /// \param IdentifierLoc The location of the identifier. 3354 /// 3355 /// \param CCLoc The location of the '::'. 3356 /// 3357 /// \param ObjectType The type of the object, if we're parsing 3358 /// nested-name-specifier in a member access expression. 3359 /// 3360 /// \param EnteringContext Whether we're entering the context nominated by 3361 /// this nested-name-specifier. 3362 /// 3363 /// \param SS The nested-name-specifier, which is both an input 3364 /// parameter (the nested-name-specifier before this type) and an 3365 /// output parameter (containing the full nested-name-specifier, 3366 /// including this new type). 3367 /// 3368 /// \returns true if an error occurred, false otherwise. 3369 bool ActOnCXXNestedNameSpecifier(Scope *S, 3370 IdentifierInfo &Identifier, 3371 SourceLocation IdentifierLoc, 3372 SourceLocation CCLoc, 3373 ParsedType ObjectType, 3374 bool EnteringContext, 3375 CXXScopeSpec &SS); 3376 3377 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3378 const DeclSpec &DS, 3379 SourceLocation ColonColonLoc); 3380 3381 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3382 IdentifierInfo &Identifier, 3383 SourceLocation IdentifierLoc, 3384 SourceLocation ColonLoc, 3385 ParsedType ObjectType, 3386 bool EnteringContext); 3387 3388 /// \brief The parser has parsed a nested-name-specifier 3389 /// 'template[opt] template-name < template-args >::'. 3390 /// 3391 /// \param S The scope in which this nested-name-specifier occurs. 3392 /// 3393 /// \param TemplateLoc The location of the 'template' keyword, if any. 3394 /// 3395 /// \param SS The nested-name-specifier, which is both an input 3396 /// parameter (the nested-name-specifier before this type) and an 3397 /// output parameter (containing the full nested-name-specifier, 3398 /// including this new type). 3399 /// 3400 /// \param TemplateLoc the location of the 'template' keyword, if any. 3401 /// \param TemplateName The template name. 3402 /// \param TemplateNameLoc The location of the template name. 3403 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3404 /// \param TemplateArgs The template arguments. 3405 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3406 /// \param CCLoc The location of the '::'. 3407 3408 /// \param EnteringContext Whether we're entering the context of the 3409 /// nested-name-specifier. 3410 /// 3411 /// 3412 /// \returns true if an error occurred, false otherwise. 3413 bool ActOnCXXNestedNameSpecifier(Scope *S, 3414 SourceLocation TemplateLoc, 3415 CXXScopeSpec &SS, 3416 TemplateTy Template, 3417 SourceLocation TemplateNameLoc, 3418 SourceLocation LAngleLoc, 3419 ASTTemplateArgsPtr TemplateArgs, 3420 SourceLocation RAngleLoc, 3421 SourceLocation CCLoc, 3422 bool EnteringContext); 3423 3424 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3425 /// that the parser can use later to reconstruct the given 3426 /// nested-name-specifier. 3427 /// 3428 /// \param SS A nested-name-specifier. 3429 /// 3430 /// \returns A pointer containing all of the information in the 3431 /// nested-name-specifier \p SS. 3432 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3433 3434 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3435 /// the nested-name-specifier structure. 3436 /// 3437 /// \param Annotation The annotation pointer, produced by 3438 /// \c SaveNestedNameSpecifierAnnotation(). 3439 /// 3440 /// \param AnnotationRange The source range corresponding to the annotation. 3441 /// 3442 /// \param SS The nested-name-specifier that will be updated with the contents 3443 /// of the annotation pointer. 3444 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3445 SourceRange AnnotationRange, 3446 CXXScopeSpec &SS); 3447 3448 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3449 3450 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3451 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3452 /// After this method is called, according to [C++ 3.4.3p3], names should be 3453 /// looked up in the declarator-id's scope, until the declarator is parsed and 3454 /// ActOnCXXExitDeclaratorScope is called. 3455 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3456 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3457 3458 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3459 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3460 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3461 /// Used to indicate that names should revert to being looked up in the 3462 /// defining scope. 3463 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3464 3465 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3466 /// initializer for the declaration 'Dcl'. 3467 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3468 /// static data member of class X, names should be looked up in the scope of 3469 /// class X. 3470 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3471 3472 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3473 /// initializer for the declaration 'Dcl'. 3474 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3475 3476 /// ActOnStartOfLambdaDefinition - This is called just before we start 3477 /// parsing the body of a lambda; it analyzes the explicit captures and 3478 /// arguments, and sets up various data-structures for the body of the 3479 /// lambda. 3480 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3481 Declarator &ParamInfo, Scope *CurScope); 3482 3483 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3484 /// is invoked to pop the information about the lambda. 3485 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope); 3486 3487 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3488 /// was successfully completed. 3489 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3490 Scope *CurScope); 3491 3492 // ParseObjCStringLiteral - Parse Objective-C string literals. 3493 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3494 Expr **Strings, 3495 unsigned NumStrings); 3496 3497 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3498 TypeSourceInfo *EncodedTypeInfo, 3499 SourceLocation RParenLoc); 3500 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3501 CXXMethodDecl *Method, 3502 bool HadMultipleCandidates); 3503 3504 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3505 SourceLocation EncodeLoc, 3506 SourceLocation LParenLoc, 3507 ParsedType Ty, 3508 SourceLocation RParenLoc); 3509 3510 // ParseObjCSelectorExpression - Build selector expression for @selector 3511 ExprResult ParseObjCSelectorExpression(Selector Sel, 3512 SourceLocation AtLoc, 3513 SourceLocation SelLoc, 3514 SourceLocation LParenLoc, 3515 SourceLocation RParenLoc); 3516 3517 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3518 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3519 SourceLocation AtLoc, 3520 SourceLocation ProtoLoc, 3521 SourceLocation LParenLoc, 3522 SourceLocation RParenLoc); 3523 3524 //===--------------------------------------------------------------------===// 3525 // C++ Declarations 3526 // 3527 Decl *ActOnStartLinkageSpecification(Scope *S, 3528 SourceLocation ExternLoc, 3529 SourceLocation LangLoc, 3530 StringRef Lang, 3531 SourceLocation LBraceLoc); 3532 Decl *ActOnFinishLinkageSpecification(Scope *S, 3533 Decl *LinkageSpec, 3534 SourceLocation RBraceLoc); 3535 3536 3537 //===--------------------------------------------------------------------===// 3538 // C++ Classes 3539 // 3540 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3541 const CXXScopeSpec *SS = 0); 3542 3543 bool ActOnAccessSpecifier(AccessSpecifier Access, 3544 SourceLocation ASLoc, 3545 SourceLocation ColonLoc, 3546 AttributeList *Attrs = 0); 3547 3548 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3549 Declarator &D, 3550 MultiTemplateParamsArg TemplateParameterLists, 3551 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3552 bool HasDeferredInit); 3553 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3554 Expr *Init); 3555 3556 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3557 Scope *S, 3558 CXXScopeSpec &SS, 3559 IdentifierInfo *MemberOrBase, 3560 ParsedType TemplateTypeTy, 3561 SourceLocation IdLoc, 3562 SourceLocation LParenLoc, 3563 Expr **Args, unsigned NumArgs, 3564 SourceLocation RParenLoc, 3565 SourceLocation EllipsisLoc); 3566 3567 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3568 Scope *S, 3569 CXXScopeSpec &SS, 3570 IdentifierInfo *MemberOrBase, 3571 ParsedType TemplateTypeTy, 3572 SourceLocation IdLoc, 3573 Expr *InitList, 3574 SourceLocation EllipsisLoc); 3575 3576 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3577 Scope *S, 3578 CXXScopeSpec &SS, 3579 IdentifierInfo *MemberOrBase, 3580 ParsedType TemplateTypeTy, 3581 SourceLocation IdLoc, 3582 const MultiInitializer &Init, 3583 SourceLocation EllipsisLoc); 3584 3585 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3586 const MultiInitializer &Args, 3587 SourceLocation IdLoc); 3588 3589 MemInitResult BuildBaseInitializer(QualType BaseType, 3590 TypeSourceInfo *BaseTInfo, 3591 const MultiInitializer &Args, 3592 CXXRecordDecl *ClassDecl, 3593 SourceLocation EllipsisLoc); 3594 3595 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3596 const MultiInitializer &Args, 3597 CXXRecordDecl *ClassDecl); 3598 3599 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3600 CXXCtorInitializer *Initializer); 3601 3602 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3603 CXXCtorInitializer **Initializers, 3604 unsigned NumInitializers, bool AnyErrors); 3605 3606 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3607 3608 3609 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3610 /// mark all the non-trivial destructors of its members and bases as 3611 /// referenced. 3612 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3613 CXXRecordDecl *Record); 3614 3615 /// \brief The list of classes whose vtables have been used within 3616 /// this translation unit, and the source locations at which the 3617 /// first use occurred. 3618 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3619 3620 /// \brief The list of vtables that are required but have not yet been 3621 /// materialized. 3622 SmallVector<VTableUse, 16> VTableUses; 3623 3624 /// \brief The set of classes whose vtables have been used within 3625 /// this translation unit, and a bit that will be true if the vtable is 3626 /// required to be emitted (otherwise, it should be emitted only if needed 3627 /// by code generation). 3628 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3629 3630 /// \brief Load any externally-stored vtable uses. 3631 void LoadExternalVTableUses(); 3632 3633 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3634 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3635 DynamicClassesType; 3636 3637 /// \brief A list of all of the dynamic classes in this translation 3638 /// unit. 3639 DynamicClassesType DynamicClasses; 3640 3641 /// \brief Note that the vtable for the given class was used at the 3642 /// given location. 3643 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3644 bool DefinitionRequired = false); 3645 3646 /// MarkVirtualMembersReferenced - Will mark all members of the given 3647 /// CXXRecordDecl referenced. 3648 void MarkVirtualMembersReferenced(SourceLocation Loc, 3649 const CXXRecordDecl *RD); 3650 3651 /// \brief Define all of the vtables that have been used in this 3652 /// translation unit and reference any virtual members used by those 3653 /// vtables. 3654 /// 3655 /// \returns true if any work was done, false otherwise. 3656 bool DefineUsedVTables(); 3657 3658 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3659 3660 void ActOnMemInitializers(Decl *ConstructorDecl, 3661 SourceLocation ColonLoc, 3662 CXXCtorInitializer **MemInits, 3663 unsigned NumMemInits, 3664 bool AnyErrors); 3665 3666 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3667 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3668 Decl *TagDecl, 3669 SourceLocation LBrac, 3670 SourceLocation RBrac, 3671 AttributeList *AttrList); 3672 3673 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3674 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3675 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3676 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3677 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3678 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3679 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3680 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3681 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3682 bool IsInsideALocalClassWithinATemplateFunction(); 3683 3684 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3685 Expr *AssertExpr, 3686 Expr *AssertMessageExpr, 3687 SourceLocation RParenLoc); 3688 3689 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3690 SourceLocation FriendLoc, 3691 TypeSourceInfo *TSInfo); 3692 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3693 MultiTemplateParamsArg TemplateParams); 3694 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3695 MultiTemplateParamsArg TemplateParams); 3696 3697 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3698 StorageClass& SC); 3699 void CheckConstructor(CXXConstructorDecl *Constructor); 3700 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3701 StorageClass& SC); 3702 bool CheckDestructor(CXXDestructorDecl *Destructor); 3703 void CheckConversionDeclarator(Declarator &D, QualType &R, 3704 StorageClass& SC); 3705 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3706 3707 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3708 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3709 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3710 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3711 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3712 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3713 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3714 3715 //===--------------------------------------------------------------------===// 3716 // C++ Derived Classes 3717 // 3718 3719 /// ActOnBaseSpecifier - Parsed a base specifier 3720 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3721 SourceRange SpecifierRange, 3722 bool Virtual, AccessSpecifier Access, 3723 TypeSourceInfo *TInfo, 3724 SourceLocation EllipsisLoc); 3725 3726 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3727 SourceRange SpecifierRange, 3728 bool Virtual, AccessSpecifier Access, 3729 ParsedType basetype, 3730 SourceLocation BaseLoc, 3731 SourceLocation EllipsisLoc); 3732 3733 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3734 unsigned NumBases); 3735 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3736 unsigned NumBases); 3737 3738 bool IsDerivedFrom(QualType Derived, QualType Base); 3739 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3740 3741 // FIXME: I don't like this name. 3742 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3743 3744 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3745 3746 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3747 SourceLocation Loc, SourceRange Range, 3748 CXXCastPath *BasePath = 0, 3749 bool IgnoreAccess = false); 3750 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3751 unsigned InaccessibleBaseID, 3752 unsigned AmbigiousBaseConvID, 3753 SourceLocation Loc, SourceRange Range, 3754 DeclarationName Name, 3755 CXXCastPath *BasePath); 3756 3757 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3758 3759 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3760 /// covariant, according to C++ [class.virtual]p5. 3761 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3762 const CXXMethodDecl *Old); 3763 3764 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3765 /// spec is a subset of base spec. 3766 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3767 const CXXMethodDecl *Old); 3768 3769 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3770 3771 /// CheckOverrideControl - Check C++0x override control semantics. 3772 void CheckOverrideControl(const Decl *D); 3773 3774 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3775 /// overrides a virtual member function marked 'final', according to 3776 /// C++0x [class.virtual]p3. 3777 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3778 const CXXMethodDecl *Old); 3779 3780 3781 //===--------------------------------------------------------------------===// 3782 // C++ Access Control 3783 // 3784 3785 enum AccessResult { 3786 AR_accessible, 3787 AR_inaccessible, 3788 AR_dependent, 3789 AR_delayed 3790 }; 3791 3792 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3793 NamedDecl *PrevMemberDecl, 3794 AccessSpecifier LexicalAS); 3795 3796 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3797 DeclAccessPair FoundDecl); 3798 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3799 DeclAccessPair FoundDecl); 3800 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3801 SourceRange PlacementRange, 3802 CXXRecordDecl *NamingClass, 3803 DeclAccessPair FoundDecl, 3804 bool Diagnose = true); 3805 AccessResult CheckConstructorAccess(SourceLocation Loc, 3806 CXXConstructorDecl *D, 3807 const InitializedEntity &Entity, 3808 AccessSpecifier Access, 3809 bool IsCopyBindingRefToTemp = false); 3810 AccessResult CheckConstructorAccess(SourceLocation Loc, 3811 CXXConstructorDecl *D, 3812 AccessSpecifier Access, 3813 PartialDiagnostic PD); 3814 AccessResult CheckDestructorAccess(SourceLocation Loc, 3815 CXXDestructorDecl *Dtor, 3816 const PartialDiagnostic &PDiag); 3817 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3818 NamedDecl *D, 3819 const PartialDiagnostic &PDiag); 3820 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3821 Expr *ObjectExpr, 3822 Expr *ArgExpr, 3823 DeclAccessPair FoundDecl); 3824 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3825 DeclAccessPair FoundDecl); 3826 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3827 QualType Base, QualType Derived, 3828 const CXXBasePath &Path, 3829 unsigned DiagID, 3830 bool ForceCheck = false, 3831 bool ForceUnprivileged = false); 3832 void CheckLookupAccess(const LookupResult &R); 3833 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3834 3835 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3836 const MultiLevelTemplateArgumentList &TemplateArgs); 3837 void PerformDependentDiagnostics(const DeclContext *Pattern, 3838 const MultiLevelTemplateArgumentList &TemplateArgs); 3839 3840 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3841 3842 /// A flag to suppress access checking. 3843 bool SuppressAccessChecking; 3844 3845 /// \brief When true, access checking violations are treated as SFINAE 3846 /// failures rather than hard errors. 3847 bool AccessCheckingSFINAE; 3848 3849 void ActOnStartSuppressingAccessChecks(); 3850 void ActOnStopSuppressingAccessChecks(); 3851 3852 enum AbstractDiagSelID { 3853 AbstractNone = -1, 3854 AbstractReturnType, 3855 AbstractParamType, 3856 AbstractVariableType, 3857 AbstractFieldType, 3858 AbstractArrayType 3859 }; 3860 3861 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3862 const PartialDiagnostic &PD); 3863 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3864 3865 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3866 AbstractDiagSelID SelID = AbstractNone); 3867 3868 //===--------------------------------------------------------------------===// 3869 // C++ Overloaded Operators [C++ 13.5] 3870 // 3871 3872 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3873 3874 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3875 3876 //===--------------------------------------------------------------------===// 3877 // C++ Templates [C++ 14] 3878 // 3879 void FilterAcceptableTemplateNames(LookupResult &R); 3880 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3881 3882 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3883 QualType ObjectType, bool EnteringContext, 3884 bool &MemberOfUnknownSpecialization); 3885 3886 TemplateNameKind isTemplateName(Scope *S, 3887 CXXScopeSpec &SS, 3888 bool hasTemplateKeyword, 3889 UnqualifiedId &Name, 3890 ParsedType ObjectType, 3891 bool EnteringContext, 3892 TemplateTy &Template, 3893 bool &MemberOfUnknownSpecialization); 3894 3895 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3896 SourceLocation IILoc, 3897 Scope *S, 3898 const CXXScopeSpec *SS, 3899 TemplateTy &SuggestedTemplate, 3900 TemplateNameKind &SuggestedKind); 3901 3902 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3903 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3904 3905 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3906 SourceLocation EllipsisLoc, 3907 SourceLocation KeyLoc, 3908 IdentifierInfo *ParamName, 3909 SourceLocation ParamNameLoc, 3910 unsigned Depth, unsigned Position, 3911 SourceLocation EqualLoc, 3912 ParsedType DefaultArg); 3913 3914 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3915 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3916 unsigned Depth, 3917 unsigned Position, 3918 SourceLocation EqualLoc, 3919 Expr *DefaultArg); 3920 Decl *ActOnTemplateTemplateParameter(Scope *S, 3921 SourceLocation TmpLoc, 3922 TemplateParameterList *Params, 3923 SourceLocation EllipsisLoc, 3924 IdentifierInfo *ParamName, 3925 SourceLocation ParamNameLoc, 3926 unsigned Depth, 3927 unsigned Position, 3928 SourceLocation EqualLoc, 3929 ParsedTemplateArgument DefaultArg); 3930 3931 TemplateParameterList * 3932 ActOnTemplateParameterList(unsigned Depth, 3933 SourceLocation ExportLoc, 3934 SourceLocation TemplateLoc, 3935 SourceLocation LAngleLoc, 3936 Decl **Params, unsigned NumParams, 3937 SourceLocation RAngleLoc); 3938 3939 /// \brief The context in which we are checking a template parameter 3940 /// list. 3941 enum TemplateParamListContext { 3942 TPC_ClassTemplate, 3943 TPC_FunctionTemplate, 3944 TPC_ClassTemplateMember, 3945 TPC_FriendFunctionTemplate, 3946 TPC_FriendFunctionTemplateDefinition, 3947 TPC_TypeAliasTemplate 3948 }; 3949 3950 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3951 TemplateParameterList *OldParams, 3952 TemplateParamListContext TPC); 3953 TemplateParameterList * 3954 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3955 SourceLocation DeclLoc, 3956 const CXXScopeSpec &SS, 3957 TemplateParameterList **ParamLists, 3958 unsigned NumParamLists, 3959 bool IsFriend, 3960 bool &IsExplicitSpecialization, 3961 bool &Invalid); 3962 3963 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3964 SourceLocation KWLoc, CXXScopeSpec &SS, 3965 IdentifierInfo *Name, SourceLocation NameLoc, 3966 AttributeList *Attr, 3967 TemplateParameterList *TemplateParams, 3968 AccessSpecifier AS, 3969 SourceLocation ModulePrivateLoc, 3970 unsigned NumOuterTemplateParamLists, 3971 TemplateParameterList **OuterTemplateParamLists); 3972 3973 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3974 TemplateArgumentListInfo &Out); 3975 3976 void NoteAllFoundTemplates(TemplateName Name); 3977 3978 QualType CheckTemplateIdType(TemplateName Template, 3979 SourceLocation TemplateLoc, 3980 TemplateArgumentListInfo &TemplateArgs); 3981 3982 TypeResult 3983 ActOnTemplateIdType(CXXScopeSpec &SS, 3984 TemplateTy Template, SourceLocation TemplateLoc, 3985 SourceLocation LAngleLoc, 3986 ASTTemplateArgsPtr TemplateArgs, 3987 SourceLocation RAngleLoc); 3988 3989 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3990 /// such as \c class T::template apply<U>. 3991 /// 3992 /// \param TUK 3993 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3994 TypeSpecifierType TagSpec, 3995 SourceLocation TagLoc, 3996 CXXScopeSpec &SS, 3997 TemplateTy TemplateD, 3998 SourceLocation TemplateLoc, 3999 SourceLocation LAngleLoc, 4000 ASTTemplateArgsPtr TemplateArgsIn, 4001 SourceLocation RAngleLoc); 4002 4003 4004 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4005 LookupResult &R, 4006 bool RequiresADL, 4007 const TemplateArgumentListInfo &TemplateArgs); 4008 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4009 const DeclarationNameInfo &NameInfo, 4010 const TemplateArgumentListInfo &TemplateArgs); 4011 4012 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4013 SourceLocation TemplateKWLoc, 4014 CXXScopeSpec &SS, 4015 UnqualifiedId &Name, 4016 ParsedType ObjectType, 4017 bool EnteringContext, 4018 TemplateTy &Template); 4019 4020 DeclResult 4021 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4022 SourceLocation KWLoc, 4023 SourceLocation ModulePrivateLoc, 4024 CXXScopeSpec &SS, 4025 TemplateTy Template, 4026 SourceLocation TemplateNameLoc, 4027 SourceLocation LAngleLoc, 4028 ASTTemplateArgsPtr TemplateArgs, 4029 SourceLocation RAngleLoc, 4030 AttributeList *Attr, 4031 MultiTemplateParamsArg TemplateParameterLists); 4032 4033 Decl *ActOnTemplateDeclarator(Scope *S, 4034 MultiTemplateParamsArg TemplateParameterLists, 4035 Declarator &D); 4036 4037 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4038 MultiTemplateParamsArg TemplateParameterLists, 4039 Declarator &D); 4040 4041 bool 4042 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4043 TemplateSpecializationKind NewTSK, 4044 NamedDecl *PrevDecl, 4045 TemplateSpecializationKind PrevTSK, 4046 SourceLocation PrevPtOfInstantiation, 4047 bool &SuppressNew); 4048 4049 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4050 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4051 LookupResult &Previous); 4052 4053 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4054 TemplateArgumentListInfo *ExplicitTemplateArgs, 4055 LookupResult &Previous); 4056 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4057 4058 DeclResult 4059 ActOnExplicitInstantiation(Scope *S, 4060 SourceLocation ExternLoc, 4061 SourceLocation TemplateLoc, 4062 unsigned TagSpec, 4063 SourceLocation KWLoc, 4064 const CXXScopeSpec &SS, 4065 TemplateTy Template, 4066 SourceLocation TemplateNameLoc, 4067 SourceLocation LAngleLoc, 4068 ASTTemplateArgsPtr TemplateArgs, 4069 SourceLocation RAngleLoc, 4070 AttributeList *Attr); 4071 4072 DeclResult 4073 ActOnExplicitInstantiation(Scope *S, 4074 SourceLocation ExternLoc, 4075 SourceLocation TemplateLoc, 4076 unsigned TagSpec, 4077 SourceLocation KWLoc, 4078 CXXScopeSpec &SS, 4079 IdentifierInfo *Name, 4080 SourceLocation NameLoc, 4081 AttributeList *Attr); 4082 4083 DeclResult ActOnExplicitInstantiation(Scope *S, 4084 SourceLocation ExternLoc, 4085 SourceLocation TemplateLoc, 4086 Declarator &D); 4087 4088 TemplateArgumentLoc 4089 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4090 SourceLocation TemplateLoc, 4091 SourceLocation RAngleLoc, 4092 Decl *Param, 4093 SmallVectorImpl<TemplateArgument> &Converted); 4094 4095 /// \brief Specifies the context in which a particular template 4096 /// argument is being checked. 4097 enum CheckTemplateArgumentKind { 4098 /// \brief The template argument was specified in the code or was 4099 /// instantiated with some deduced template arguments. 4100 CTAK_Specified, 4101 4102 /// \brief The template argument was deduced via template argument 4103 /// deduction. 4104 CTAK_Deduced, 4105 4106 /// \brief The template argument was deduced from an array bound 4107 /// via template argument deduction. 4108 CTAK_DeducedFromArrayBound 4109 }; 4110 4111 bool CheckTemplateArgument(NamedDecl *Param, 4112 const TemplateArgumentLoc &Arg, 4113 NamedDecl *Template, 4114 SourceLocation TemplateLoc, 4115 SourceLocation RAngleLoc, 4116 unsigned ArgumentPackIndex, 4117 SmallVectorImpl<TemplateArgument> &Converted, 4118 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4119 4120 /// \brief Check that the given template arguments can be be provided to 4121 /// the given template, converting the arguments along the way. 4122 /// 4123 /// \param Template The template to which the template arguments are being 4124 /// provided. 4125 /// 4126 /// \param TemplateLoc The location of the template name in the source. 4127 /// 4128 /// \param TemplateArgs The list of template arguments. If the template is 4129 /// a template template parameter, this function may extend the set of 4130 /// template arguments to also include substituted, defaulted template 4131 /// arguments. 4132 /// 4133 /// \param PartialTemplateArgs True if the list of template arguments is 4134 /// intentionally partial, e.g., because we're checking just the initial 4135 /// set of template arguments. 4136 /// 4137 /// \param Converted Will receive the converted, canonicalized template 4138 /// arguments. 4139 /// 4140 /// \returns True if an error occurred, false otherwise. 4141 bool CheckTemplateArgumentList(TemplateDecl *Template, 4142 SourceLocation TemplateLoc, 4143 TemplateArgumentListInfo &TemplateArgs, 4144 bool PartialTemplateArgs, 4145 SmallVectorImpl<TemplateArgument> &Converted); 4146 4147 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4148 const TemplateArgumentLoc &Arg, 4149 SmallVectorImpl<TemplateArgument> &Converted); 4150 4151 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4152 TypeSourceInfo *Arg); 4153 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4154 TemplateArgument &Converted); 4155 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4156 QualType InstantiatedParamType, Expr *Arg, 4157 TemplateArgument &Converted, 4158 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4159 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4160 const TemplateArgumentLoc &Arg); 4161 4162 ExprResult 4163 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4164 QualType ParamType, 4165 SourceLocation Loc); 4166 ExprResult 4167 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4168 SourceLocation Loc); 4169 4170 /// \brief Enumeration describing how template parameter lists are compared 4171 /// for equality. 4172 enum TemplateParameterListEqualKind { 4173 /// \brief We are matching the template parameter lists of two templates 4174 /// that might be redeclarations. 4175 /// 4176 /// \code 4177 /// template<typename T> struct X; 4178 /// template<typename T> struct X; 4179 /// \endcode 4180 TPL_TemplateMatch, 4181 4182 /// \brief We are matching the template parameter lists of two template 4183 /// template parameters as part of matching the template parameter lists 4184 /// of two templates that might be redeclarations. 4185 /// 4186 /// \code 4187 /// template<template<int I> class TT> struct X; 4188 /// template<template<int Value> class Other> struct X; 4189 /// \endcode 4190 TPL_TemplateTemplateParmMatch, 4191 4192 /// \brief We are matching the template parameter lists of a template 4193 /// template argument against the template parameter lists of a template 4194 /// template parameter. 4195 /// 4196 /// \code 4197 /// template<template<int Value> class Metafun> struct X; 4198 /// template<int Value> struct integer_c; 4199 /// X<integer_c> xic; 4200 /// \endcode 4201 TPL_TemplateTemplateArgumentMatch 4202 }; 4203 4204 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4205 TemplateParameterList *Old, 4206 bool Complain, 4207 TemplateParameterListEqualKind Kind, 4208 SourceLocation TemplateArgLoc 4209 = SourceLocation()); 4210 4211 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4212 4213 /// \brief Called when the parser has parsed a C++ typename 4214 /// specifier, e.g., "typename T::type". 4215 /// 4216 /// \param S The scope in which this typename type occurs. 4217 /// \param TypenameLoc the location of the 'typename' keyword 4218 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4219 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4220 /// \param IdLoc the location of the identifier. 4221 TypeResult 4222 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4223 const CXXScopeSpec &SS, const IdentifierInfo &II, 4224 SourceLocation IdLoc); 4225 4226 /// \brief Called when the parser has parsed a C++ typename 4227 /// specifier that ends in a template-id, e.g., 4228 /// "typename MetaFun::template apply<T1, T2>". 4229 /// 4230 /// \param S The scope in which this typename type occurs. 4231 /// \param TypenameLoc the location of the 'typename' keyword 4232 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4233 /// \param TemplateLoc the location of the 'template' keyword, if any. 4234 /// \param TemplateName The template name. 4235 /// \param TemplateNameLoc The location of the template name. 4236 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4237 /// \param TemplateArgs The template arguments. 4238 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4239 TypeResult 4240 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4241 const CXXScopeSpec &SS, 4242 SourceLocation TemplateLoc, 4243 TemplateTy Template, 4244 SourceLocation TemplateNameLoc, 4245 SourceLocation LAngleLoc, 4246 ASTTemplateArgsPtr TemplateArgs, 4247 SourceLocation RAngleLoc); 4248 4249 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4250 SourceLocation KeywordLoc, 4251 NestedNameSpecifierLoc QualifierLoc, 4252 const IdentifierInfo &II, 4253 SourceLocation IILoc); 4254 4255 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4256 SourceLocation Loc, 4257 DeclarationName Name); 4258 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4259 4260 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4261 bool RebuildTemplateParamsInCurrentInstantiation( 4262 TemplateParameterList *Params); 4263 4264 std::string 4265 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4266 const TemplateArgumentList &Args); 4267 4268 std::string 4269 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4270 const TemplateArgument *Args, 4271 unsigned NumArgs); 4272 4273 //===--------------------------------------------------------------------===// 4274 // C++ Variadic Templates (C++0x [temp.variadic]) 4275 //===--------------------------------------------------------------------===// 4276 4277 /// \brief The context in which an unexpanded parameter pack is 4278 /// being diagnosed. 4279 /// 4280 /// Note that the values of this enumeration line up with the first 4281 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4282 enum UnexpandedParameterPackContext { 4283 /// \brief An arbitrary expression. 4284 UPPC_Expression = 0, 4285 4286 /// \brief The base type of a class type. 4287 UPPC_BaseType, 4288 4289 /// \brief The type of an arbitrary declaration. 4290 UPPC_DeclarationType, 4291 4292 /// \brief The type of a data member. 4293 UPPC_DataMemberType, 4294 4295 /// \brief The size of a bit-field. 4296 UPPC_BitFieldWidth, 4297 4298 /// \brief The expression in a static assertion. 4299 UPPC_StaticAssertExpression, 4300 4301 /// \brief The fixed underlying type of an enumeration. 4302 UPPC_FixedUnderlyingType, 4303 4304 /// \brief The enumerator value. 4305 UPPC_EnumeratorValue, 4306 4307 /// \brief A using declaration. 4308 UPPC_UsingDeclaration, 4309 4310 /// \brief A friend declaration. 4311 UPPC_FriendDeclaration, 4312 4313 /// \brief A declaration qualifier. 4314 UPPC_DeclarationQualifier, 4315 4316 /// \brief An initializer. 4317 UPPC_Initializer, 4318 4319 /// \brief A default argument. 4320 UPPC_DefaultArgument, 4321 4322 /// \brief The type of a non-type template parameter. 4323 UPPC_NonTypeTemplateParameterType, 4324 4325 /// \brief The type of an exception. 4326 UPPC_ExceptionType, 4327 4328 /// \brief Partial specialization. 4329 UPPC_PartialSpecialization, 4330 4331 /// \brief Microsoft __if_exists. 4332 UPPC_IfExists, 4333 4334 /// \brief Microsoft __if_not_exists. 4335 UPPC_IfNotExists 4336}; 4337 4338 /// \brief Diagnose unexpanded parameter packs. 4339 /// 4340 /// \param Loc The location at which we should emit the diagnostic. 4341 /// 4342 /// \param UPPC The context in which we are diagnosing unexpanded 4343 /// parameter packs. 4344 /// 4345 /// \param Unexpanded the set of unexpanded parameter packs. 4346 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4347 UnexpandedParameterPackContext UPPC, 4348 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4349 4350 /// \brief If the given type contains an unexpanded parameter pack, 4351 /// diagnose the error. 4352 /// 4353 /// \param Loc The source location where a diagnostc should be emitted. 4354 /// 4355 /// \param T The type that is being checked for unexpanded parameter 4356 /// packs. 4357 /// 4358 /// \returns true if an error occurred, false otherwise. 4359 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4360 UnexpandedParameterPackContext UPPC); 4361 4362 /// \brief If the given expression contains an unexpanded parameter 4363 /// pack, diagnose the error. 4364 /// 4365 /// \param E The expression that is being checked for unexpanded 4366 /// parameter packs. 4367 /// 4368 /// \returns true if an error occurred, false otherwise. 4369 bool DiagnoseUnexpandedParameterPack(Expr *E, 4370 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4371 4372 /// \brief If the given nested-name-specifier contains an unexpanded 4373 /// parameter pack, diagnose the error. 4374 /// 4375 /// \param SS The nested-name-specifier that is being checked for 4376 /// unexpanded parameter packs. 4377 /// 4378 /// \returns true if an error occurred, false otherwise. 4379 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4380 UnexpandedParameterPackContext UPPC); 4381 4382 /// \brief If the given name contains an unexpanded parameter pack, 4383 /// diagnose the error. 4384 /// 4385 /// \param NameInfo The name (with source location information) that 4386 /// is being checked for unexpanded parameter packs. 4387 /// 4388 /// \returns true if an error occurred, false otherwise. 4389 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4390 UnexpandedParameterPackContext UPPC); 4391 4392 /// \brief If the given template name contains an unexpanded parameter pack, 4393 /// diagnose the error. 4394 /// 4395 /// \param Loc The location of the template name. 4396 /// 4397 /// \param Template The template name that is being checked for unexpanded 4398 /// parameter packs. 4399 /// 4400 /// \returns true if an error occurred, false otherwise. 4401 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4402 TemplateName Template, 4403 UnexpandedParameterPackContext UPPC); 4404 4405 /// \brief If the given template argument contains an unexpanded parameter 4406 /// pack, diagnose the error. 4407 /// 4408 /// \param Arg The template argument that is being checked for unexpanded 4409 /// parameter packs. 4410 /// 4411 /// \returns true if an error occurred, false otherwise. 4412 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4413 UnexpandedParameterPackContext UPPC); 4414 4415 /// \brief Collect the set of unexpanded parameter packs within the given 4416 /// template argument. 4417 /// 4418 /// \param Arg The template argument that will be traversed to find 4419 /// unexpanded parameter packs. 4420 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4421 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4422 4423 /// \brief Collect the set of unexpanded parameter packs within the given 4424 /// template argument. 4425 /// 4426 /// \param Arg The template argument that will be traversed to find 4427 /// unexpanded parameter packs. 4428 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4429 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4430 4431 /// \brief Collect the set of unexpanded parameter packs within the given 4432 /// type. 4433 /// 4434 /// \param T The type that will be traversed to find 4435 /// unexpanded parameter packs. 4436 void collectUnexpandedParameterPacks(QualType T, 4437 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4438 4439 /// \brief Collect the set of unexpanded parameter packs within the given 4440 /// type. 4441 /// 4442 /// \param TL The type that will be traversed to find 4443 /// unexpanded parameter packs. 4444 void collectUnexpandedParameterPacks(TypeLoc TL, 4445 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4446 4447 /// \brief Collect the set of unexpanded parameter packs within the given 4448 /// nested-name-specifier. 4449 /// 4450 /// \param SS The nested-name-specifier that will be traversed to find 4451 /// unexpanded parameter packs. 4452 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4453 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4454 4455 /// \brief Collect the set of unexpanded parameter packs within the given 4456 /// name. 4457 /// 4458 /// \param NameInfo The name that will be traversed to find 4459 /// unexpanded parameter packs. 4460 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4461 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4462 4463 /// \brief Invoked when parsing a template argument followed by an 4464 /// ellipsis, which creates a pack expansion. 4465 /// 4466 /// \param Arg The template argument preceding the ellipsis, which 4467 /// may already be invalid. 4468 /// 4469 /// \param EllipsisLoc The location of the ellipsis. 4470 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4471 SourceLocation EllipsisLoc); 4472 4473 /// \brief Invoked when parsing a type followed by an ellipsis, which 4474 /// creates a pack expansion. 4475 /// 4476 /// \param Type The type preceding the ellipsis, which will become 4477 /// the pattern of the pack expansion. 4478 /// 4479 /// \param EllipsisLoc The location of the ellipsis. 4480 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4481 4482 /// \brief Construct a pack expansion type from the pattern of the pack 4483 /// expansion. 4484 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4485 SourceLocation EllipsisLoc, 4486 llvm::Optional<unsigned> NumExpansions); 4487 4488 /// \brief Construct a pack expansion type from the pattern of the pack 4489 /// expansion. 4490 QualType CheckPackExpansion(QualType Pattern, 4491 SourceRange PatternRange, 4492 SourceLocation EllipsisLoc, 4493 llvm::Optional<unsigned> NumExpansions); 4494 4495 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4496 /// creates a pack expansion. 4497 /// 4498 /// \param Pattern The expression preceding the ellipsis, which will become 4499 /// the pattern of the pack expansion. 4500 /// 4501 /// \param EllipsisLoc The location of the ellipsis. 4502 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4503 4504 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4505 /// creates a pack expansion. 4506 /// 4507 /// \param Pattern The expression preceding the ellipsis, which will become 4508 /// the pattern of the pack expansion. 4509 /// 4510 /// \param EllipsisLoc The location of the ellipsis. 4511 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4512 llvm::Optional<unsigned> NumExpansions); 4513 4514 /// \brief Determine whether we could expand a pack expansion with the 4515 /// given set of parameter packs into separate arguments by repeatedly 4516 /// transforming the pattern. 4517 /// 4518 /// \param EllipsisLoc The location of the ellipsis that identifies the 4519 /// pack expansion. 4520 /// 4521 /// \param PatternRange The source range that covers the entire pattern of 4522 /// the pack expansion. 4523 /// 4524 /// \param Unexpanded The set of unexpanded parameter packs within the 4525 /// pattern. 4526 /// 4527 /// \param NumUnexpanded The number of unexpanded parameter packs in 4528 /// \p Unexpanded. 4529 /// 4530 /// \param ShouldExpand Will be set to \c true if the transformer should 4531 /// expand the corresponding pack expansions into separate arguments. When 4532 /// set, \c NumExpansions must also be set. 4533 /// 4534 /// \param RetainExpansion Whether the caller should add an unexpanded 4535 /// pack expansion after all of the expanded arguments. This is used 4536 /// when extending explicitly-specified template argument packs per 4537 /// C++0x [temp.arg.explicit]p9. 4538 /// 4539 /// \param NumExpansions The number of separate arguments that will be in 4540 /// the expanded form of the corresponding pack expansion. This is both an 4541 /// input and an output parameter, which can be set by the caller if the 4542 /// number of expansions is known a priori (e.g., due to a prior substitution) 4543 /// and will be set by the callee when the number of expansions is known. 4544 /// The callee must set this value when \c ShouldExpand is \c true; it may 4545 /// set this value in other cases. 4546 /// 4547 /// \returns true if an error occurred (e.g., because the parameter packs 4548 /// are to be instantiated with arguments of different lengths), false 4549 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4550 /// must be set. 4551 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4552 SourceRange PatternRange, 4553 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4554 const MultiLevelTemplateArgumentList &TemplateArgs, 4555 bool &ShouldExpand, 4556 bool &RetainExpansion, 4557 llvm::Optional<unsigned> &NumExpansions); 4558 4559 /// \brief Determine the number of arguments in the given pack expansion 4560 /// type. 4561 /// 4562 /// This routine already assumes that the pack expansion type can be 4563 /// expanded and that the number of arguments in the expansion is 4564 /// consistent across all of the unexpanded parameter packs in its pattern. 4565 unsigned getNumArgumentsInExpansion(QualType T, 4566 const MultiLevelTemplateArgumentList &TemplateArgs); 4567 4568 /// \brief Determine whether the given declarator contains any unexpanded 4569 /// parameter packs. 4570 /// 4571 /// This routine is used by the parser to disambiguate function declarators 4572 /// with an ellipsis prior to the ')', e.g., 4573 /// 4574 /// \code 4575 /// void f(T...); 4576 /// \endcode 4577 /// 4578 /// To determine whether we have an (unnamed) function parameter pack or 4579 /// a variadic function. 4580 /// 4581 /// \returns true if the declarator contains any unexpanded parameter packs, 4582 /// false otherwise. 4583 bool containsUnexpandedParameterPacks(Declarator &D); 4584 4585 //===--------------------------------------------------------------------===// 4586 // C++ Template Argument Deduction (C++ [temp.deduct]) 4587 //===--------------------------------------------------------------------===// 4588 4589 /// \brief Describes the result of template argument deduction. 4590 /// 4591 /// The TemplateDeductionResult enumeration describes the result of 4592 /// template argument deduction, as returned from 4593 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4594 /// structure provides additional information about the results of 4595 /// template argument deduction, e.g., the deduced template argument 4596 /// list (if successful) or the specific template parameters or 4597 /// deduced arguments that were involved in the failure. 4598 enum TemplateDeductionResult { 4599 /// \brief Template argument deduction was successful. 4600 TDK_Success = 0, 4601 /// \brief Template argument deduction exceeded the maximum template 4602 /// instantiation depth (which has already been diagnosed). 4603 TDK_InstantiationDepth, 4604 /// \brief Template argument deduction did not deduce a value 4605 /// for every template parameter. 4606 TDK_Incomplete, 4607 /// \brief Template argument deduction produced inconsistent 4608 /// deduced values for the given template parameter. 4609 TDK_Inconsistent, 4610 /// \brief Template argument deduction failed due to inconsistent 4611 /// cv-qualifiers on a template parameter type that would 4612 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4613 /// but were given a non-const "X". 4614 TDK_Underqualified, 4615 /// \brief Substitution of the deduced template argument values 4616 /// resulted in an error. 4617 TDK_SubstitutionFailure, 4618 /// \brief Substitution of the deduced template argument values 4619 /// into a non-deduced context produced a type or value that 4620 /// produces a type that does not match the original template 4621 /// arguments provided. 4622 TDK_NonDeducedMismatch, 4623 /// \brief When performing template argument deduction for a function 4624 /// template, there were too many call arguments. 4625 TDK_TooManyArguments, 4626 /// \brief When performing template argument deduction for a function 4627 /// template, there were too few call arguments. 4628 TDK_TooFewArguments, 4629 /// \brief The explicitly-specified template arguments were not valid 4630 /// template arguments for the given template. 4631 TDK_InvalidExplicitArguments, 4632 /// \brief The arguments included an overloaded function name that could 4633 /// not be resolved to a suitable function. 4634 TDK_FailedOverloadResolution 4635 }; 4636 4637 TemplateDeductionResult 4638 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4639 const TemplateArgumentList &TemplateArgs, 4640 sema::TemplateDeductionInfo &Info); 4641 4642 TemplateDeductionResult 4643 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4644 TemplateArgumentListInfo &ExplicitTemplateArgs, 4645 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4646 SmallVectorImpl<QualType> &ParamTypes, 4647 QualType *FunctionType, 4648 sema::TemplateDeductionInfo &Info); 4649 4650 /// brief A function argument from which we performed template argument 4651 // deduction for a call. 4652 struct OriginalCallArg { 4653 OriginalCallArg(QualType OriginalParamType, 4654 unsigned ArgIdx, 4655 QualType OriginalArgType) 4656 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4657 OriginalArgType(OriginalArgType) { } 4658 4659 QualType OriginalParamType; 4660 unsigned ArgIdx; 4661 QualType OriginalArgType; 4662 }; 4663 4664 TemplateDeductionResult 4665 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4666 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4667 unsigned NumExplicitlySpecified, 4668 FunctionDecl *&Specialization, 4669 sema::TemplateDeductionInfo &Info, 4670 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4671 4672 TemplateDeductionResult 4673 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4674 TemplateArgumentListInfo *ExplicitTemplateArgs, 4675 Expr **Args, unsigned NumArgs, 4676 FunctionDecl *&Specialization, 4677 sema::TemplateDeductionInfo &Info); 4678 4679 TemplateDeductionResult 4680 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4681 TemplateArgumentListInfo *ExplicitTemplateArgs, 4682 QualType ArgFunctionType, 4683 FunctionDecl *&Specialization, 4684 sema::TemplateDeductionInfo &Info); 4685 4686 TemplateDeductionResult 4687 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4688 QualType ToType, 4689 CXXConversionDecl *&Specialization, 4690 sema::TemplateDeductionInfo &Info); 4691 4692 TemplateDeductionResult 4693 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4694 TemplateArgumentListInfo *ExplicitTemplateArgs, 4695 FunctionDecl *&Specialization, 4696 sema::TemplateDeductionInfo &Info); 4697 4698 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4699 TypeSourceInfo *&Result); 4700 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4701 4702 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4703 FunctionTemplateDecl *FT2, 4704 SourceLocation Loc, 4705 TemplatePartialOrderingContext TPOC, 4706 unsigned NumCallArguments); 4707 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4708 UnresolvedSetIterator SEnd, 4709 TemplatePartialOrderingContext TPOC, 4710 unsigned NumCallArguments, 4711 SourceLocation Loc, 4712 const PartialDiagnostic &NoneDiag, 4713 const PartialDiagnostic &AmbigDiag, 4714 const PartialDiagnostic &CandidateDiag, 4715 bool Complain = true, 4716 QualType TargetType = QualType()); 4717 4718 ClassTemplatePartialSpecializationDecl * 4719 getMoreSpecializedPartialSpecialization( 4720 ClassTemplatePartialSpecializationDecl *PS1, 4721 ClassTemplatePartialSpecializationDecl *PS2, 4722 SourceLocation Loc); 4723 4724 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4725 bool OnlyDeduced, 4726 unsigned Depth, 4727 SmallVectorImpl<bool> &Used); 4728 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4729 SmallVectorImpl<bool> &Deduced) { 4730 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4731 } 4732 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4733 FunctionTemplateDecl *FunctionTemplate, 4734 SmallVectorImpl<bool> &Deduced); 4735 4736 //===--------------------------------------------------------------------===// 4737 // C++ Template Instantiation 4738 // 4739 4740 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4741 const TemplateArgumentList *Innermost = 0, 4742 bool RelativeToPrimary = false, 4743 const FunctionDecl *Pattern = 0); 4744 4745 /// \brief A template instantiation that is currently in progress. 4746 struct ActiveTemplateInstantiation { 4747 /// \brief The kind of template instantiation we are performing 4748 enum InstantiationKind { 4749 /// We are instantiating a template declaration. The entity is 4750 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4751 TemplateInstantiation, 4752 4753 /// We are instantiating a default argument for a template 4754 /// parameter. The Entity is the template, and 4755 /// TemplateArgs/NumTemplateArguments provides the template 4756 /// arguments as specified. 4757 /// FIXME: Use a TemplateArgumentList 4758 DefaultTemplateArgumentInstantiation, 4759 4760 /// We are instantiating a default argument for a function. 4761 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4762 /// provides the template arguments as specified. 4763 DefaultFunctionArgumentInstantiation, 4764 4765 /// We are substituting explicit template arguments provided for 4766 /// a function template. The entity is a FunctionTemplateDecl. 4767 ExplicitTemplateArgumentSubstitution, 4768 4769 /// We are substituting template argument determined as part of 4770 /// template argument deduction for either a class template 4771 /// partial specialization or a function template. The 4772 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4773 /// a FunctionTemplateDecl. 4774 DeducedTemplateArgumentSubstitution, 4775 4776 /// We are substituting prior template arguments into a new 4777 /// template parameter. The template parameter itself is either a 4778 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4779 PriorTemplateArgumentSubstitution, 4780 4781 /// We are checking the validity of a default template argument that 4782 /// has been used when naming a template-id. 4783 DefaultTemplateArgumentChecking 4784 } Kind; 4785 4786 /// \brief The point of instantiation within the source code. 4787 SourceLocation PointOfInstantiation; 4788 4789 /// \brief The template (or partial specialization) in which we are 4790 /// performing the instantiation, for substitutions of prior template 4791 /// arguments. 4792 NamedDecl *Template; 4793 4794 /// \brief The entity that is being instantiated. 4795 uintptr_t Entity; 4796 4797 /// \brief The list of template arguments we are substituting, if they 4798 /// are not part of the entity. 4799 const TemplateArgument *TemplateArgs; 4800 4801 /// \brief The number of template arguments in TemplateArgs. 4802 unsigned NumTemplateArgs; 4803 4804 /// \brief The template deduction info object associated with the 4805 /// substitution or checking of explicit or deduced template arguments. 4806 sema::TemplateDeductionInfo *DeductionInfo; 4807 4808 /// \brief The source range that covers the construct that cause 4809 /// the instantiation, e.g., the template-id that causes a class 4810 /// template instantiation. 4811 SourceRange InstantiationRange; 4812 4813 ActiveTemplateInstantiation() 4814 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4815 NumTemplateArgs(0), DeductionInfo(0) {} 4816 4817 /// \brief Determines whether this template is an actual instantiation 4818 /// that should be counted toward the maximum instantiation depth. 4819 bool isInstantiationRecord() const; 4820 4821 friend bool operator==(const ActiveTemplateInstantiation &X, 4822 const ActiveTemplateInstantiation &Y) { 4823 if (X.Kind != Y.Kind) 4824 return false; 4825 4826 if (X.Entity != Y.Entity) 4827 return false; 4828 4829 switch (X.Kind) { 4830 case TemplateInstantiation: 4831 return true; 4832 4833 case PriorTemplateArgumentSubstitution: 4834 case DefaultTemplateArgumentChecking: 4835 if (X.Template != Y.Template) 4836 return false; 4837 4838 // Fall through 4839 4840 case DefaultTemplateArgumentInstantiation: 4841 case ExplicitTemplateArgumentSubstitution: 4842 case DeducedTemplateArgumentSubstitution: 4843 case DefaultFunctionArgumentInstantiation: 4844 return X.TemplateArgs == Y.TemplateArgs; 4845 4846 } 4847 4848 llvm_unreachable("Invalid InstantiationKind!"); 4849 } 4850 4851 friend bool operator!=(const ActiveTemplateInstantiation &X, 4852 const ActiveTemplateInstantiation &Y) { 4853 return !(X == Y); 4854 } 4855 }; 4856 4857 /// \brief List of active template instantiations. 4858 /// 4859 /// This vector is treated as a stack. As one template instantiation 4860 /// requires another template instantiation, additional 4861 /// instantiations are pushed onto the stack up to a 4862 /// user-configurable limit LangOptions::InstantiationDepth. 4863 SmallVector<ActiveTemplateInstantiation, 16> 4864 ActiveTemplateInstantiations; 4865 4866 /// \brief Whether we are in a SFINAE context that is not associated with 4867 /// template instantiation. 4868 /// 4869 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4870 /// of a template instantiation or template argument deduction. 4871 bool InNonInstantiationSFINAEContext; 4872 4873 /// \brief The number of ActiveTemplateInstantiation entries in 4874 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4875 /// therefore, should not be counted as part of the instantiation depth. 4876 unsigned NonInstantiationEntries; 4877 4878 /// \brief The last template from which a template instantiation 4879 /// error or warning was produced. 4880 /// 4881 /// This value is used to suppress printing of redundant template 4882 /// instantiation backtraces when there are multiple errors in the 4883 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4884 /// to implement it anywhere else. 4885 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4886 4887 /// \brief The current index into pack expansion arguments that will be 4888 /// used for substitution of parameter packs. 4889 /// 4890 /// The pack expansion index will be -1 to indicate that parameter packs 4891 /// should be instantiated as themselves. Otherwise, the index specifies 4892 /// which argument within the parameter pack will be used for substitution. 4893 int ArgumentPackSubstitutionIndex; 4894 4895 /// \brief RAII object used to change the argument pack substitution index 4896 /// within a \c Sema object. 4897 /// 4898 /// See \c ArgumentPackSubstitutionIndex for more information. 4899 class ArgumentPackSubstitutionIndexRAII { 4900 Sema &Self; 4901 int OldSubstitutionIndex; 4902 4903 public: 4904 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4905 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4906 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4907 } 4908 4909 ~ArgumentPackSubstitutionIndexRAII() { 4910 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4911 } 4912 }; 4913 4914 friend class ArgumentPackSubstitutionRAII; 4915 4916 /// \brief The stack of calls expression undergoing template instantiation. 4917 /// 4918 /// The top of this stack is used by a fixit instantiating unresolved 4919 /// function calls to fix the AST to match the textual change it prints. 4920 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4921 4922 /// \brief For each declaration that involved template argument deduction, the 4923 /// set of diagnostics that were suppressed during that template argument 4924 /// deduction. 4925 /// 4926 /// FIXME: Serialize this structure to the AST file. 4927 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4928 SuppressedDiagnostics; 4929 4930 /// \brief A stack object to be created when performing template 4931 /// instantiation. 4932 /// 4933 /// Construction of an object of type \c InstantiatingTemplate 4934 /// pushes the current instantiation onto the stack of active 4935 /// instantiations. If the size of this stack exceeds the maximum 4936 /// number of recursive template instantiations, construction 4937 /// produces an error and evaluates true. 4938 /// 4939 /// Destruction of this object will pop the named instantiation off 4940 /// the stack. 4941 struct InstantiatingTemplate { 4942 /// \brief Note that we are instantiating a class template, 4943 /// function template, or a member thereof. 4944 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4945 Decl *Entity, 4946 SourceRange InstantiationRange = SourceRange()); 4947 4948 /// \brief Note that we are instantiating a default argument in a 4949 /// template-id. 4950 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4951 TemplateDecl *Template, 4952 const TemplateArgument *TemplateArgs, 4953 unsigned NumTemplateArgs, 4954 SourceRange InstantiationRange = SourceRange()); 4955 4956 /// \brief Note that we are instantiating a default argument in a 4957 /// template-id. 4958 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4959 FunctionTemplateDecl *FunctionTemplate, 4960 const TemplateArgument *TemplateArgs, 4961 unsigned NumTemplateArgs, 4962 ActiveTemplateInstantiation::InstantiationKind Kind, 4963 sema::TemplateDeductionInfo &DeductionInfo, 4964 SourceRange InstantiationRange = SourceRange()); 4965 4966 /// \brief Note that we are instantiating as part of template 4967 /// argument deduction for a class template partial 4968 /// specialization. 4969 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4970 ClassTemplatePartialSpecializationDecl *PartialSpec, 4971 const TemplateArgument *TemplateArgs, 4972 unsigned NumTemplateArgs, 4973 sema::TemplateDeductionInfo &DeductionInfo, 4974 SourceRange InstantiationRange = SourceRange()); 4975 4976 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4977 ParmVarDecl *Param, 4978 const TemplateArgument *TemplateArgs, 4979 unsigned NumTemplateArgs, 4980 SourceRange InstantiationRange = SourceRange()); 4981 4982 /// \brief Note that we are substituting prior template arguments into a 4983 /// non-type or template template parameter. 4984 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4985 NamedDecl *Template, 4986 NonTypeTemplateParmDecl *Param, 4987 const TemplateArgument *TemplateArgs, 4988 unsigned NumTemplateArgs, 4989 SourceRange InstantiationRange); 4990 4991 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4992 NamedDecl *Template, 4993 TemplateTemplateParmDecl *Param, 4994 const TemplateArgument *TemplateArgs, 4995 unsigned NumTemplateArgs, 4996 SourceRange InstantiationRange); 4997 4998 /// \brief Note that we are checking the default template argument 4999 /// against the template parameter for a given template-id. 5000 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5001 TemplateDecl *Template, 5002 NamedDecl *Param, 5003 const TemplateArgument *TemplateArgs, 5004 unsigned NumTemplateArgs, 5005 SourceRange InstantiationRange); 5006 5007 5008 /// \brief Note that we have finished instantiating this template. 5009 void Clear(); 5010 5011 ~InstantiatingTemplate() { Clear(); } 5012 5013 /// \brief Determines whether we have exceeded the maximum 5014 /// recursive template instantiations. 5015 operator bool() const { return Invalid; } 5016 5017 private: 5018 Sema &SemaRef; 5019 bool Invalid; 5020 bool SavedInNonInstantiationSFINAEContext; 5021 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5022 SourceRange InstantiationRange); 5023 5024 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5025 5026 InstantiatingTemplate& 5027 operator=(const InstantiatingTemplate&); // not implemented 5028 }; 5029 5030 void PrintInstantiationStack(); 5031 5032 /// \brief Determines whether we are currently in a context where 5033 /// template argument substitution failures are not considered 5034 /// errors. 5035 /// 5036 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5037 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5038 /// template-deduction context object, which can be used to capture 5039 /// diagnostics that will be suppressed. 5040 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5041 5042 /// \brief RAII class used to determine whether SFINAE has 5043 /// trapped any errors that occur during template argument 5044 /// deduction.` 5045 class SFINAETrap { 5046 Sema &SemaRef; 5047 unsigned PrevSFINAEErrors; 5048 bool PrevInNonInstantiationSFINAEContext; 5049 bool PrevAccessCheckingSFINAE; 5050 5051 public: 5052 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5053 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5054 PrevInNonInstantiationSFINAEContext( 5055 SemaRef.InNonInstantiationSFINAEContext), 5056 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5057 { 5058 if (!SemaRef.isSFINAEContext()) 5059 SemaRef.InNonInstantiationSFINAEContext = true; 5060 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5061 } 5062 5063 ~SFINAETrap() { 5064 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5065 SemaRef.InNonInstantiationSFINAEContext 5066 = PrevInNonInstantiationSFINAEContext; 5067 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5068 } 5069 5070 /// \brief Determine whether any SFINAE errors have been trapped. 5071 bool hasErrorOccurred() const { 5072 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5073 } 5074 }; 5075 5076 /// \brief The current instantiation scope used to store local 5077 /// variables. 5078 LocalInstantiationScope *CurrentInstantiationScope; 5079 5080 /// \brief The number of typos corrected by CorrectTypo. 5081 unsigned TyposCorrected; 5082 5083 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5084 UnqualifiedTyposCorrectedMap; 5085 5086 /// \brief A cache containing the results of typo correction for unqualified 5087 /// name lookup. 5088 /// 5089 /// The string is the string that we corrected to (which may be empty, if 5090 /// there was no correction), while the boolean will be true when the 5091 /// string represents a keyword. 5092 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5093 5094 /// \brief Worker object for performing CFG-based warnings. 5095 sema::AnalysisBasedWarnings AnalysisWarnings; 5096 5097 /// \brief An entity for which implicit template instantiation is required. 5098 /// 5099 /// The source location associated with the declaration is the first place in 5100 /// the source code where the declaration was "used". It is not necessarily 5101 /// the point of instantiation (which will be either before or after the 5102 /// namespace-scope declaration that triggered this implicit instantiation), 5103 /// However, it is the location that diagnostics should generally refer to, 5104 /// because users will need to know what code triggered the instantiation. 5105 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5106 5107 /// \brief The queue of implicit template instantiations that are required 5108 /// but have not yet been performed. 5109 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5110 5111 /// \brief The queue of implicit template instantiations that are required 5112 /// and must be performed within the current local scope. 5113 /// 5114 /// This queue is only used for member functions of local classes in 5115 /// templates, which must be instantiated in the same scope as their 5116 /// enclosing function, so that they can reference function-local 5117 /// types, static variables, enumerators, etc. 5118 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5119 5120 void PerformPendingInstantiations(bool LocalOnly = false); 5121 5122 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5123 const MultiLevelTemplateArgumentList &TemplateArgs, 5124 SourceLocation Loc, DeclarationName Entity); 5125 5126 QualType SubstType(QualType T, 5127 const MultiLevelTemplateArgumentList &TemplateArgs, 5128 SourceLocation Loc, DeclarationName Entity); 5129 5130 TypeSourceInfo *SubstType(TypeLoc TL, 5131 const MultiLevelTemplateArgumentList &TemplateArgs, 5132 SourceLocation Loc, DeclarationName Entity); 5133 5134 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5135 const MultiLevelTemplateArgumentList &TemplateArgs, 5136 SourceLocation Loc, 5137 DeclarationName Entity); 5138 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5139 const MultiLevelTemplateArgumentList &TemplateArgs, 5140 int indexAdjustment, 5141 llvm::Optional<unsigned> NumExpansions); 5142 bool SubstParmTypes(SourceLocation Loc, 5143 ParmVarDecl **Params, unsigned NumParams, 5144 const MultiLevelTemplateArgumentList &TemplateArgs, 5145 SmallVectorImpl<QualType> &ParamTypes, 5146 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5147 ExprResult SubstExpr(Expr *E, 5148 const MultiLevelTemplateArgumentList &TemplateArgs); 5149 5150 /// \brief Substitute the given template arguments into a list of 5151 /// expressions, expanding pack expansions if required. 5152 /// 5153 /// \param Exprs The list of expressions to substitute into. 5154 /// 5155 /// \param NumExprs The number of expressions in \p Exprs. 5156 /// 5157 /// \param IsCall Whether this is some form of call, in which case 5158 /// default arguments will be dropped. 5159 /// 5160 /// \param TemplateArgs The set of template arguments to substitute. 5161 /// 5162 /// \param Outputs Will receive all of the substituted arguments. 5163 /// 5164 /// \returns true if an error occurred, false otherwise. 5165 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5166 const MultiLevelTemplateArgumentList &TemplateArgs, 5167 SmallVectorImpl<Expr *> &Outputs); 5168 5169 StmtResult SubstStmt(Stmt *S, 5170 const MultiLevelTemplateArgumentList &TemplateArgs); 5171 5172 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5173 const MultiLevelTemplateArgumentList &TemplateArgs); 5174 5175 bool 5176 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5177 CXXRecordDecl *Pattern, 5178 const MultiLevelTemplateArgumentList &TemplateArgs); 5179 5180 bool 5181 InstantiateClass(SourceLocation PointOfInstantiation, 5182 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5183 const MultiLevelTemplateArgumentList &TemplateArgs, 5184 TemplateSpecializationKind TSK, 5185 bool Complain = true); 5186 5187 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5188 const Decl *Pattern, Decl *Inst); 5189 5190 bool 5191 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5192 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5193 TemplateSpecializationKind TSK, 5194 bool Complain = true); 5195 5196 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5197 CXXRecordDecl *Instantiation, 5198 const MultiLevelTemplateArgumentList &TemplateArgs, 5199 TemplateSpecializationKind TSK); 5200 5201 void InstantiateClassTemplateSpecializationMembers( 5202 SourceLocation PointOfInstantiation, 5203 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5204 TemplateSpecializationKind TSK); 5205 5206 NestedNameSpecifierLoc 5207 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5208 const MultiLevelTemplateArgumentList &TemplateArgs); 5209 5210 DeclarationNameInfo 5211 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5212 const MultiLevelTemplateArgumentList &TemplateArgs); 5213 TemplateName 5214 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5215 SourceLocation Loc, 5216 const MultiLevelTemplateArgumentList &TemplateArgs); 5217 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5218 TemplateArgumentListInfo &Result, 5219 const MultiLevelTemplateArgumentList &TemplateArgs); 5220 5221 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5222 FunctionDecl *Function, 5223 bool Recursive = false, 5224 bool DefinitionRequired = false); 5225 void InstantiateStaticDataMemberDefinition( 5226 SourceLocation PointOfInstantiation, 5227 VarDecl *Var, 5228 bool Recursive = false, 5229 bool DefinitionRequired = false); 5230 5231 void InstantiateMemInitializers(CXXConstructorDecl *New, 5232 const CXXConstructorDecl *Tmpl, 5233 const MultiLevelTemplateArgumentList &TemplateArgs); 5234 bool InstantiateInitializer(Expr *Init, 5235 const MultiLevelTemplateArgumentList &TemplateArgs, 5236 SourceLocation &LParenLoc, 5237 ASTOwningVector<Expr*> &NewArgs, 5238 SourceLocation &RParenLoc); 5239 5240 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5241 const MultiLevelTemplateArgumentList &TemplateArgs); 5242 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5243 const MultiLevelTemplateArgumentList &TemplateArgs); 5244 5245 // Objective-C declarations. 5246 enum ObjCContainerKind { 5247 OCK_None = -1, 5248 OCK_Interface = 0, 5249 OCK_Protocol, 5250 OCK_Category, 5251 OCK_ClassExtension, 5252 OCK_Implementation, 5253 OCK_CategoryImplementation 5254 }; 5255 ObjCContainerKind getObjCContainerKind() const; 5256 5257 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5258 IdentifierInfo *ClassName, 5259 SourceLocation ClassLoc, 5260 IdentifierInfo *SuperName, 5261 SourceLocation SuperLoc, 5262 Decl * const *ProtoRefs, 5263 unsigned NumProtoRefs, 5264 const SourceLocation *ProtoLocs, 5265 SourceLocation EndProtoLoc, 5266 AttributeList *AttrList); 5267 5268 Decl *ActOnCompatiblityAlias( 5269 SourceLocation AtCompatibilityAliasLoc, 5270 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5271 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5272 5273 bool CheckForwardProtocolDeclarationForCircularDependency( 5274 IdentifierInfo *PName, 5275 SourceLocation &PLoc, SourceLocation PrevLoc, 5276 const ObjCList<ObjCProtocolDecl> &PList); 5277 5278 Decl *ActOnStartProtocolInterface( 5279 SourceLocation AtProtoInterfaceLoc, 5280 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5281 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5282 const SourceLocation *ProtoLocs, 5283 SourceLocation EndProtoLoc, 5284 AttributeList *AttrList); 5285 5286 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5287 IdentifierInfo *ClassName, 5288 SourceLocation ClassLoc, 5289 IdentifierInfo *CategoryName, 5290 SourceLocation CategoryLoc, 5291 Decl * const *ProtoRefs, 5292 unsigned NumProtoRefs, 5293 const SourceLocation *ProtoLocs, 5294 SourceLocation EndProtoLoc); 5295 5296 Decl *ActOnStartClassImplementation( 5297 SourceLocation AtClassImplLoc, 5298 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5299 IdentifierInfo *SuperClassname, 5300 SourceLocation SuperClassLoc); 5301 5302 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5303 IdentifierInfo *ClassName, 5304 SourceLocation ClassLoc, 5305 IdentifierInfo *CatName, 5306 SourceLocation CatLoc); 5307 5308 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5309 IdentifierInfo **IdentList, 5310 SourceLocation *IdentLocs, 5311 unsigned NumElts); 5312 5313 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5314 const IdentifierLocPair *IdentList, 5315 unsigned NumElts, 5316 AttributeList *attrList); 5317 5318 void FindProtocolDeclaration(bool WarnOnDeclarations, 5319 const IdentifierLocPair *ProtocolId, 5320 unsigned NumProtocols, 5321 SmallVectorImpl<Decl *> &Protocols); 5322 5323 /// Ensure attributes are consistent with type. 5324 /// \param [in, out] Attributes The attributes to check; they will 5325 /// be modified to be consistent with \arg PropertyTy. 5326 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5327 SourceLocation Loc, 5328 unsigned &Attributes); 5329 5330 /// Process the specified property declaration and create decls for the 5331 /// setters and getters as needed. 5332 /// \param property The property declaration being processed 5333 /// \param DC The semantic container for the property 5334 /// \param redeclaredProperty Declaration for property if redeclared 5335 /// in class extension. 5336 /// \param lexicalDC Container for redeclaredProperty. 5337 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5338 ObjCContainerDecl *DC, 5339 ObjCPropertyDecl *redeclaredProperty = 0, 5340 ObjCContainerDecl *lexicalDC = 0); 5341 5342 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5343 ObjCPropertyDecl *SuperProperty, 5344 const IdentifierInfo *Name); 5345 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5346 5347 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5348 ObjCMethodDecl *MethodDecl, 5349 bool IsInstance); 5350 5351 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5352 5353 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5354 ObjCInterfaceDecl *ID); 5355 5356 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5357 ObjCProtocolDecl *PDecl); 5358 5359 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5360 Decl **allMethods = 0, unsigned allNum = 0, 5361 Decl **allProperties = 0, unsigned pNum = 0, 5362 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5363 5364 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5365 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5366 Selector GetterSel, Selector SetterSel, 5367 bool *OverridingProperty, 5368 tok::ObjCKeywordKind MethodImplKind, 5369 DeclContext *lexicalDC = 0); 5370 5371 Decl *ActOnPropertyImplDecl(Scope *S, 5372 SourceLocation AtLoc, 5373 SourceLocation PropertyLoc, 5374 bool ImplKind, 5375 IdentifierInfo *PropertyId, 5376 IdentifierInfo *PropertyIvar, 5377 SourceLocation PropertyIvarLoc); 5378 5379 enum ObjCSpecialMethodKind { 5380 OSMK_None, 5381 OSMK_Alloc, 5382 OSMK_New, 5383 OSMK_Copy, 5384 OSMK_RetainingInit, 5385 OSMK_NonRetainingInit 5386 }; 5387 5388 struct ObjCArgInfo { 5389 IdentifierInfo *Name; 5390 SourceLocation NameLoc; 5391 // The Type is null if no type was specified, and the DeclSpec is invalid 5392 // in this case. 5393 ParsedType Type; 5394 ObjCDeclSpec DeclSpec; 5395 5396 /// ArgAttrs - Attribute list for this argument. 5397 AttributeList *ArgAttrs; 5398 }; 5399 5400 Decl *ActOnMethodDeclaration( 5401 Scope *S, 5402 SourceLocation BeginLoc, // location of the + or -. 5403 SourceLocation EndLoc, // location of the ; or {. 5404 tok::TokenKind MethodType, 5405 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5406 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5407 // optional arguments. The number of types/arguments is obtained 5408 // from the Sel.getNumArgs(). 5409 ObjCArgInfo *ArgInfo, 5410 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5411 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5412 bool isVariadic, bool MethodDefinition); 5413 5414 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5415 // Will search "local" class/category implementations for a method decl. 5416 // Will also search in class's root looking for instance method. 5417 // Returns 0 if no method is found. 5418 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5419 ObjCInterfaceDecl *CDecl); 5420 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5421 ObjCInterfaceDecl *ClassDecl); 5422 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5423 const ObjCObjectPointerType *OPT, 5424 bool IsInstance); 5425 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5426 bool IsInstance); 5427 5428 bool inferObjCARCLifetime(ValueDecl *decl); 5429 5430 ExprResult 5431 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5432 Expr *BaseExpr, 5433 SourceLocation OpLoc, 5434 DeclarationName MemberName, 5435 SourceLocation MemberLoc, 5436 SourceLocation SuperLoc, QualType SuperType, 5437 bool Super); 5438 5439 ExprResult 5440 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5441 IdentifierInfo &propertyName, 5442 SourceLocation receiverNameLoc, 5443 SourceLocation propertyNameLoc); 5444 5445 ObjCMethodDecl *tryCaptureObjCSelf(); 5446 5447 /// \brief Describes the kind of message expression indicated by a message 5448 /// send that starts with an identifier. 5449 enum ObjCMessageKind { 5450 /// \brief The message is sent to 'super'. 5451 ObjCSuperMessage, 5452 /// \brief The message is an instance message. 5453 ObjCInstanceMessage, 5454 /// \brief The message is a class message, and the identifier is a type 5455 /// name. 5456 ObjCClassMessage 5457 }; 5458 5459 ObjCMessageKind getObjCMessageKind(Scope *S, 5460 IdentifierInfo *Name, 5461 SourceLocation NameLoc, 5462 bool IsSuper, 5463 bool HasTrailingDot, 5464 ParsedType &ReceiverType); 5465 5466 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5467 Selector Sel, 5468 SourceLocation LBracLoc, 5469 ArrayRef<SourceLocation> SelectorLocs, 5470 SourceLocation RBracLoc, 5471 MultiExprArg Args); 5472 5473 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5474 QualType ReceiverType, 5475 SourceLocation SuperLoc, 5476 Selector Sel, 5477 ObjCMethodDecl *Method, 5478 SourceLocation LBracLoc, 5479 ArrayRef<SourceLocation> SelectorLocs, 5480 SourceLocation RBracLoc, 5481 MultiExprArg Args, 5482 bool isImplicit = false); 5483 5484 ExprResult BuildClassMessageImplicit(QualType ReceiverType, 5485 bool isSuperReceiver, 5486 SourceLocation Loc, 5487 Selector Sel, 5488 ObjCMethodDecl *Method, 5489 MultiExprArg Args); 5490 5491 ExprResult ActOnClassMessage(Scope *S, 5492 ParsedType Receiver, 5493 Selector Sel, 5494 SourceLocation LBracLoc, 5495 ArrayRef<SourceLocation> SelectorLocs, 5496 SourceLocation RBracLoc, 5497 MultiExprArg Args); 5498 5499 ExprResult BuildInstanceMessage(Expr *Receiver, 5500 QualType ReceiverType, 5501 SourceLocation SuperLoc, 5502 Selector Sel, 5503 ObjCMethodDecl *Method, 5504 SourceLocation LBracLoc, 5505 ArrayRef<SourceLocation> SelectorLocs, 5506 SourceLocation RBracLoc, 5507 MultiExprArg Args, 5508 bool isImplicit = false); 5509 5510 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5511 QualType ReceiverType, 5512 SourceLocation Loc, 5513 Selector Sel, 5514 ObjCMethodDecl *Method, 5515 MultiExprArg Args); 5516 5517 ExprResult ActOnInstanceMessage(Scope *S, 5518 Expr *Receiver, 5519 Selector Sel, 5520 SourceLocation LBracLoc, 5521 ArrayRef<SourceLocation> SelectorLocs, 5522 SourceLocation RBracLoc, 5523 MultiExprArg Args); 5524 5525 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5526 ObjCBridgeCastKind Kind, 5527 SourceLocation BridgeKeywordLoc, 5528 TypeSourceInfo *TSInfo, 5529 Expr *SubExpr); 5530 5531 ExprResult ActOnObjCBridgedCast(Scope *S, 5532 SourceLocation LParenLoc, 5533 ObjCBridgeCastKind Kind, 5534 SourceLocation BridgeKeywordLoc, 5535 ParsedType Type, 5536 SourceLocation RParenLoc, 5537 Expr *SubExpr); 5538 5539 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5540 5541 /// \brief Check whether the given new method is a valid override of the 5542 /// given overridden method, and set any properties that should be inherited. 5543 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5544 const ObjCMethodDecl *Overridden, 5545 bool IsImplementation); 5546 5547 /// \brief Check whether the given method overrides any methods in its class, 5548 /// calling \c CheckObjCMethodOverride for each overridden method. 5549 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5550 5551 enum PragmaOptionsAlignKind { 5552 POAK_Native, // #pragma options align=native 5553 POAK_Natural, // #pragma options align=natural 5554 POAK_Packed, // #pragma options align=packed 5555 POAK_Power, // #pragma options align=power 5556 POAK_Mac68k, // #pragma options align=mac68k 5557 POAK_Reset // #pragma options align=reset 5558 }; 5559 5560 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5561 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5562 SourceLocation PragmaLoc, 5563 SourceLocation KindLoc); 5564 5565 enum PragmaPackKind { 5566 PPK_Default, // #pragma pack([n]) 5567 PPK_Show, // #pragma pack(show), only supported by MSVC. 5568 PPK_Push, // #pragma pack(push, [identifier], [n]) 5569 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5570 }; 5571 5572 enum PragmaMSStructKind { 5573 PMSST_OFF, // #pragms ms_struct off 5574 PMSST_ON // #pragms ms_struct on 5575 }; 5576 5577 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5578 void ActOnPragmaPack(PragmaPackKind Kind, 5579 IdentifierInfo *Name, 5580 Expr *Alignment, 5581 SourceLocation PragmaLoc, 5582 SourceLocation LParenLoc, 5583 SourceLocation RParenLoc); 5584 5585 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5586 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5587 5588 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5589 void ActOnPragmaUnused(const Token &Identifier, 5590 Scope *curScope, 5591 SourceLocation PragmaLoc); 5592 5593 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5594 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5595 SourceLocation PragmaLoc); 5596 5597 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5598 SourceLocation Loc); 5599 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5600 5601 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5602 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5603 SourceLocation PragmaLoc, 5604 SourceLocation WeakNameLoc); 5605 5606 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5607 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5608 IdentifierInfo* AliasName, 5609 SourceLocation PragmaLoc, 5610 SourceLocation WeakNameLoc, 5611 SourceLocation AliasNameLoc); 5612 5613 /// ActOnPragmaFPContract - Called on well formed 5614 /// #pragma {STDC,OPENCL} FP_CONTRACT 5615 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5616 5617 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5618 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5619 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5620 5621 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5622 void AddMsStructLayoutForRecord(RecordDecl *RD); 5623 5624 /// FreePackedContext - Deallocate and null out PackContext. 5625 void FreePackedContext(); 5626 5627 /// PushNamespaceVisibilityAttr - Note that we've entered a 5628 /// namespace with a visibility attribute. 5629 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5630 5631 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5632 /// add an appropriate visibility attribute. 5633 void AddPushedVisibilityAttribute(Decl *RD); 5634 5635 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5636 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5637 void PopPragmaVisibility(); 5638 5639 /// FreeVisContext - Deallocate and null out VisContext. 5640 void FreeVisContext(); 5641 5642 /// AddCFAuditedAttribute - Check whether we're currently within 5643 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5644 /// the appropriate attribute. 5645 void AddCFAuditedAttribute(Decl *D); 5646 5647 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5648 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5649 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5650 5651 /// \brief The kind of conversion being performed. 5652 enum CheckedConversionKind { 5653 /// \brief An implicit conversion. 5654 CCK_ImplicitConversion, 5655 /// \brief A C-style cast. 5656 CCK_CStyleCast, 5657 /// \brief A functional-style cast. 5658 CCK_FunctionalCast, 5659 /// \brief A cast other than a C-style cast. 5660 CCK_OtherCast 5661 }; 5662 5663 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5664 /// cast. If there is already an implicit cast, merge into the existing one. 5665 /// If isLvalue, the result of the cast is an lvalue. 5666 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5667 ExprValueKind VK = VK_RValue, 5668 const CXXCastPath *BasePath = 0, 5669 CheckedConversionKind CCK 5670 = CCK_ImplicitConversion); 5671 5672 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5673 /// to the conversion from scalar type ScalarTy to the Boolean type. 5674 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5675 5676 /// IgnoredValueConversions - Given that an expression's result is 5677 /// syntactically ignored, perform any conversions that are 5678 /// required. 5679 ExprResult IgnoredValueConversions(Expr *E); 5680 5681 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5682 // functions and arrays to their respective pointers (C99 6.3.2.1). 5683 ExprResult UsualUnaryConversions(Expr *E); 5684 5685 // DefaultFunctionArrayConversion - converts functions and arrays 5686 // to their respective pointers (C99 6.3.2.1). 5687 ExprResult DefaultFunctionArrayConversion(Expr *E); 5688 5689 // DefaultFunctionArrayLvalueConversion - converts functions and 5690 // arrays to their respective pointers and performs the 5691 // lvalue-to-rvalue conversion. 5692 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5693 5694 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5695 // the operand. This is DefaultFunctionArrayLvalueConversion, 5696 // except that it assumes the operand isn't of function or array 5697 // type. 5698 ExprResult DefaultLvalueConversion(Expr *E); 5699 5700 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5701 // do not have a prototype. Integer promotions are performed on each 5702 // argument, and arguments that have type float are promoted to double. 5703 ExprResult DefaultArgumentPromotion(Expr *E); 5704 5705 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5706 enum VariadicCallType { 5707 VariadicFunction, 5708 VariadicBlock, 5709 VariadicMethod, 5710 VariadicConstructor, 5711 VariadicDoesNotApply 5712 }; 5713 5714 /// GatherArgumentsForCall - Collector argument expressions for various 5715 /// form of call prototypes. 5716 bool GatherArgumentsForCall(SourceLocation CallLoc, 5717 FunctionDecl *FDecl, 5718 const FunctionProtoType *Proto, 5719 unsigned FirstProtoArg, 5720 Expr **Args, unsigned NumArgs, 5721 SmallVector<Expr *, 8> &AllArgs, 5722 VariadicCallType CallType = VariadicDoesNotApply); 5723 5724 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5725 // will warn if the resulting type is not a POD type. 5726 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5727 FunctionDecl *FDecl); 5728 5729 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5730 // operands and then handles various conversions that are common to binary 5731 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5732 // routine returns the first non-arithmetic type found. The client is 5733 // responsible for emitting appropriate error diagnostics. 5734 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5735 bool IsCompAssign = false); 5736 5737 /// AssignConvertType - All of the 'assignment' semantic checks return this 5738 /// enum to indicate whether the assignment was allowed. These checks are 5739 /// done for simple assignments, as well as initialization, return from 5740 /// function, argument passing, etc. The query is phrased in terms of a 5741 /// source and destination type. 5742 enum AssignConvertType { 5743 /// Compatible - the types are compatible according to the standard. 5744 Compatible, 5745 5746 /// PointerToInt - The assignment converts a pointer to an int, which we 5747 /// accept as an extension. 5748 PointerToInt, 5749 5750 /// IntToPointer - The assignment converts an int to a pointer, which we 5751 /// accept as an extension. 5752 IntToPointer, 5753 5754 /// FunctionVoidPointer - The assignment is between a function pointer and 5755 /// void*, which the standard doesn't allow, but we accept as an extension. 5756 FunctionVoidPointer, 5757 5758 /// IncompatiblePointer - The assignment is between two pointers types that 5759 /// are not compatible, but we accept them as an extension. 5760 IncompatiblePointer, 5761 5762 /// IncompatiblePointer - The assignment is between two pointers types which 5763 /// point to integers which have a different sign, but are otherwise 5764 /// identical. This is a subset of the above, but broken out because it's by 5765 /// far the most common case of incompatible pointers. 5766 IncompatiblePointerSign, 5767 5768 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5769 /// c/v/r qualifiers, which we accept as an extension. 5770 CompatiblePointerDiscardsQualifiers, 5771 5772 /// IncompatiblePointerDiscardsQualifiers - The assignment 5773 /// discards qualifiers that we don't permit to be discarded, 5774 /// like address spaces. 5775 IncompatiblePointerDiscardsQualifiers, 5776 5777 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5778 /// nested pointer types, and the qualifiers other than the first two 5779 /// levels differ e.g. char ** -> const char **, but we accept them as an 5780 /// extension. 5781 IncompatibleNestedPointerQualifiers, 5782 5783 /// IncompatibleVectors - The assignment is between two vector types that 5784 /// have the same size, which we accept as an extension. 5785 IncompatibleVectors, 5786 5787 /// IntToBlockPointer - The assignment converts an int to a block 5788 /// pointer. We disallow this. 5789 IntToBlockPointer, 5790 5791 /// IncompatibleBlockPointer - The assignment is between two block 5792 /// pointers types that are not compatible. 5793 IncompatibleBlockPointer, 5794 5795 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5796 /// id type and something else (that is incompatible with it). For example, 5797 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5798 IncompatibleObjCQualifiedId, 5799 5800 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5801 /// object with __weak qualifier. 5802 IncompatibleObjCWeakRef, 5803 5804 /// Incompatible - We reject this conversion outright, it is invalid to 5805 /// represent it in the AST. 5806 Incompatible 5807 }; 5808 5809 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5810 /// assignment conversion type specified by ConvTy. This returns true if the 5811 /// conversion was invalid or false if the conversion was accepted. 5812 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5813 SourceLocation Loc, 5814 QualType DstType, QualType SrcType, 5815 Expr *SrcExpr, AssignmentAction Action, 5816 bool *Complained = 0); 5817 5818 /// CheckAssignmentConstraints - Perform type checking for assignment, 5819 /// argument passing, variable initialization, and function return values. 5820 /// C99 6.5.16. 5821 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5822 QualType LHSType, 5823 QualType RHSType); 5824 5825 /// Check assignment constraints and prepare for a conversion of the 5826 /// RHS to the LHS type. 5827 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5828 ExprResult &RHS, 5829 CastKind &Kind); 5830 5831 // CheckSingleAssignmentConstraints - Currently used by 5832 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5833 // this routine performs the default function/array converions. 5834 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5835 ExprResult &RHS, 5836 bool Diagnose = true); 5837 5838 // \brief If the lhs type is a transparent union, check whether we 5839 // can initialize the transparent union with the given expression. 5840 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5841 ExprResult &RHS); 5842 5843 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5844 5845 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5846 5847 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5848 AssignmentAction Action, 5849 bool AllowExplicit = false); 5850 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5851 AssignmentAction Action, 5852 bool AllowExplicit, 5853 ImplicitConversionSequence& ICS); 5854 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5855 const ImplicitConversionSequence& ICS, 5856 AssignmentAction Action, 5857 CheckedConversionKind CCK 5858 = CCK_ImplicitConversion); 5859 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5860 const StandardConversionSequence& SCS, 5861 AssignmentAction Action, 5862 CheckedConversionKind CCK); 5863 5864 /// the following "Check" methods will return a valid/converted QualType 5865 /// or a null QualType (indicating an error diagnostic was issued). 5866 5867 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5868 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5869 ExprResult &RHS); 5870 QualType CheckPointerToMemberOperands( // C++ 5.5 5871 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5872 SourceLocation OpLoc, bool isIndirect); 5873 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5874 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5875 bool IsDivide); 5876 QualType CheckRemainderOperands( // C99 6.5.5 5877 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5878 bool IsCompAssign = false); 5879 QualType CheckAdditionOperands( // C99 6.5.6 5880 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5881 QualType* CompLHSTy = 0); 5882 QualType CheckSubtractionOperands( // C99 6.5.6 5883 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5884 QualType* CompLHSTy = 0); 5885 QualType CheckShiftOperands( // C99 6.5.7 5886 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5887 bool IsCompAssign = false); 5888 QualType CheckCompareOperands( // C99 6.5.8/9 5889 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5890 bool isRelational); 5891 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5892 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5893 bool IsCompAssign = false); 5894 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5895 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5896 // CheckAssignmentOperands is used for both simple and compound assignment. 5897 // For simple assignment, pass both expressions and a null converted type. 5898 // For compound assignment, pass both expressions and the converted type. 5899 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5900 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5901 5902 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5903 UnaryOperatorKind Opcode, Expr *Op); 5904 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5905 BinaryOperatorKind Opcode, 5906 Expr *LHS, Expr *RHS); 5907 ExprResult checkPseudoObjectRValue(Expr *E); 5908 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 5909 5910 QualType CheckConditionalOperands( // C99 6.5.15 5911 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5912 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5913 QualType CXXCheckConditionalOperands( // C++ 5.16 5914 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5915 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5916 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5917 bool *NonStandardCompositeType = 0); 5918 QualType FindCompositePointerType(SourceLocation Loc, 5919 ExprResult &E1, ExprResult &E2, 5920 bool *NonStandardCompositeType = 0) { 5921 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5922 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5923 NonStandardCompositeType); 5924 E1 = Owned(E1Tmp); 5925 E2 = Owned(E2Tmp); 5926 return Composite; 5927 } 5928 5929 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5930 SourceLocation QuestionLoc); 5931 5932 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5933 SourceLocation QuestionLoc); 5934 5935 /// type checking for vector binary operators. 5936 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5937 SourceLocation Loc, bool IsCompAssign); 5938 QualType GetSignedVectorType(QualType V); 5939 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5940 SourceLocation Loc, bool isRelational); 5941 QualType CheckVectorLogicalOperands(ExprResult LHS, ExprResult RHS, 5942 SourceLocation Loc); 5943 5944 /// type checking declaration initializers (C99 6.7.8) 5945 bool CheckForConstantInitializer(Expr *e, QualType t); 5946 5947 // type checking C++ declaration initializers (C++ [dcl.init]). 5948 5949 /// ReferenceCompareResult - Expresses the result of comparing two 5950 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5951 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5952 enum ReferenceCompareResult { 5953 /// Ref_Incompatible - The two types are incompatible, so direct 5954 /// reference binding is not possible. 5955 Ref_Incompatible = 0, 5956 /// Ref_Related - The two types are reference-related, which means 5957 /// that their unqualified forms (T1 and T2) are either the same 5958 /// or T1 is a base class of T2. 5959 Ref_Related, 5960 /// Ref_Compatible_With_Added_Qualification - The two types are 5961 /// reference-compatible with added qualification, meaning that 5962 /// they are reference-compatible and the qualifiers on T1 (cv1) 5963 /// are greater than the qualifiers on T2 (cv2). 5964 Ref_Compatible_With_Added_Qualification, 5965 /// Ref_Compatible - The two types are reference-compatible and 5966 /// have equivalent qualifiers (cv1 == cv2). 5967 Ref_Compatible 5968 }; 5969 5970 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5971 QualType T1, QualType T2, 5972 bool &DerivedToBase, 5973 bool &ObjCConversion, 5974 bool &ObjCLifetimeConversion); 5975 5976 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5977 Expr *CastExpr, CastKind &CastKind, 5978 ExprValueKind &VK, CXXCastPath &Path); 5979 5980 /// \brief Force an expression with unknown-type to an expression of the 5981 /// given type. 5982 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 5983 5984 // CheckVectorCast - check type constraints for vectors. 5985 // Since vectors are an extension, there are no C standard reference for this. 5986 // We allow casting between vectors and integer datatypes of the same size. 5987 // returns true if the cast is invalid 5988 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5989 CastKind &Kind); 5990 5991 // CheckExtVectorCast - check type constraints for extended vectors. 5992 // Since vectors are an extension, there are no C standard reference for this. 5993 // We allow casting between vectors and integer datatypes of the same size, 5994 // or vectors and the element type of that vector. 5995 // returns the cast expr 5996 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5997 CastKind &Kind); 5998 5999 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6000 SourceLocation LParenLoc, 6001 Expr *CastExpr, 6002 SourceLocation RParenLoc); 6003 6004 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6005 6006 /// \brief Checks for invalid conversions and casts between 6007 /// retainable pointers and other pointer kinds. 6008 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6009 QualType castType, Expr *&op, 6010 CheckedConversionKind CCK); 6011 6012 Expr *stripARCUnbridgedCast(Expr *e); 6013 void diagnoseARCUnbridgedCast(Expr *e); 6014 6015 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6016 QualType ExprType); 6017 6018 /// checkRetainCycles - Check whether an Objective-C message send 6019 /// might create an obvious retain cycle. 6020 void checkRetainCycles(ObjCMessageExpr *msg); 6021 void checkRetainCycles(Expr *receiver, Expr *argument); 6022 6023 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6024 /// to weak/__unsafe_unretained type. 6025 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6026 6027 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6028 /// to weak/__unsafe_unretained expression. 6029 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6030 6031 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6032 /// \param Method - May be null. 6033 /// \param [out] ReturnType - The return type of the send. 6034 /// \return true iff there were any incompatible types. 6035 bool CheckMessageArgumentTypes(QualType ReceiverType, 6036 Expr **Args, unsigned NumArgs, Selector Sel, 6037 ObjCMethodDecl *Method, bool isClassMessage, 6038 bool isSuperMessage, 6039 SourceLocation lbrac, SourceLocation rbrac, 6040 QualType &ReturnType, ExprValueKind &VK); 6041 6042 /// \brief Determine the result of a message send expression based on 6043 /// the type of the receiver, the method expected to receive the message, 6044 /// and the form of the message send. 6045 QualType getMessageSendResultType(QualType ReceiverType, 6046 ObjCMethodDecl *Method, 6047 bool isClassMessage, bool isSuperMessage); 6048 6049 /// \brief If the given expression involves a message send to a method 6050 /// with a related result type, emit a note describing what happened. 6051 void EmitRelatedResultTypeNote(const Expr *E); 6052 6053 /// CheckBooleanCondition - Diagnose problems involving the use of 6054 /// the given expression as a boolean condition (e.g. in an if 6055 /// statement). Also performs the standard function and array 6056 /// decays, possibly changing the input variable. 6057 /// 6058 /// \param Loc - A location associated with the condition, e.g. the 6059 /// 'if' keyword. 6060 /// \return true iff there were any errors 6061 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6062 6063 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6064 Expr *SubExpr); 6065 6066 /// DiagnoseAssignmentAsCondition - Given that an expression is 6067 /// being used as a boolean condition, warn if it's an assignment. 6068 void DiagnoseAssignmentAsCondition(Expr *E); 6069 6070 /// \brief Redundant parentheses over an equality comparison can indicate 6071 /// that the user intended an assignment used as condition. 6072 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6073 6074 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6075 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6076 6077 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6078 /// the specified width and sign. If an overflow occurs, detect it and emit 6079 /// the specified diagnostic. 6080 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6081 unsigned NewWidth, bool NewSign, 6082 SourceLocation Loc, unsigned DiagID); 6083 6084 /// Checks that the Objective-C declaration is declared in the global scope. 6085 /// Emits an error and marks the declaration as invalid if it's not declared 6086 /// in the global scope. 6087 bool CheckObjCDeclScope(Decl *D); 6088 6089 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6090 /// and reports the appropriate diagnostics. Returns false on success. 6091 /// Can optionally return the value of the expression. 6092 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0, 6093 unsigned DiagId = 0, 6094 bool AllowFold = true); 6095 6096 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6097 /// the correct width, and that the field type is valid. 6098 /// Returns false on success. 6099 /// Can optionally return whether the bit-field is of width 0 6100 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6101 QualType FieldTy, const Expr *BitWidth, 6102 bool *ZeroWidth = 0); 6103 6104 enum CUDAFunctionTarget { 6105 CFT_Device, 6106 CFT_Global, 6107 CFT_Host, 6108 CFT_HostDevice 6109 }; 6110 6111 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6112 6113 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6114 CUDAFunctionTarget CalleeTarget); 6115 6116 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6117 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6118 IdentifyCUDATarget(Callee)); 6119 } 6120 6121 /// \name Code completion 6122 //@{ 6123 /// \brief Describes the context in which code completion occurs. 6124 enum ParserCompletionContext { 6125 /// \brief Code completion occurs at top-level or namespace context. 6126 PCC_Namespace, 6127 /// \brief Code completion occurs within a class, struct, or union. 6128 PCC_Class, 6129 /// \brief Code completion occurs within an Objective-C interface, protocol, 6130 /// or category. 6131 PCC_ObjCInterface, 6132 /// \brief Code completion occurs within an Objective-C implementation or 6133 /// category implementation 6134 PCC_ObjCImplementation, 6135 /// \brief Code completion occurs within the list of instance variables 6136 /// in an Objective-C interface, protocol, category, or implementation. 6137 PCC_ObjCInstanceVariableList, 6138 /// \brief Code completion occurs following one or more template 6139 /// headers. 6140 PCC_Template, 6141 /// \brief Code completion occurs following one or more template 6142 /// headers within a class. 6143 PCC_MemberTemplate, 6144 /// \brief Code completion occurs within an expression. 6145 PCC_Expression, 6146 /// \brief Code completion occurs within a statement, which may 6147 /// also be an expression or a declaration. 6148 PCC_Statement, 6149 /// \brief Code completion occurs at the beginning of the 6150 /// initialization statement (or expression) in a for loop. 6151 PCC_ForInit, 6152 /// \brief Code completion occurs within the condition of an if, 6153 /// while, switch, or for statement. 6154 PCC_Condition, 6155 /// \brief Code completion occurs within the body of a function on a 6156 /// recovery path, where we do not have a specific handle on our position 6157 /// in the grammar. 6158 PCC_RecoveryInFunction, 6159 /// \brief Code completion occurs where only a type is permitted. 6160 PCC_Type, 6161 /// \brief Code completion occurs in a parenthesized expression, which 6162 /// might also be a type cast. 6163 PCC_ParenthesizedExpression, 6164 /// \brief Code completion occurs within a sequence of declaration 6165 /// specifiers within a function, method, or block. 6166 PCC_LocalDeclarationSpecifiers 6167 }; 6168 6169 void CodeCompleteOrdinaryName(Scope *S, 6170 ParserCompletionContext CompletionContext); 6171 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6172 bool AllowNonIdentifiers, 6173 bool AllowNestedNameSpecifiers); 6174 6175 struct CodeCompleteExpressionData; 6176 void CodeCompleteExpression(Scope *S, 6177 const CodeCompleteExpressionData &Data); 6178 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6179 SourceLocation OpLoc, 6180 bool IsArrow); 6181 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6182 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6183 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6184 void CodeCompleteCase(Scope *S); 6185 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6186 void CodeCompleteInitializer(Scope *S, Decl *D); 6187 void CodeCompleteReturn(Scope *S); 6188 void CodeCompleteAfterIf(Scope *S); 6189 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6190 6191 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6192 bool EnteringContext); 6193 void CodeCompleteUsing(Scope *S); 6194 void CodeCompleteUsingDirective(Scope *S); 6195 void CodeCompleteNamespaceDecl(Scope *S); 6196 void CodeCompleteNamespaceAliasDecl(Scope *S); 6197 void CodeCompleteOperatorName(Scope *S); 6198 void CodeCompleteConstructorInitializer(Decl *Constructor, 6199 CXXCtorInitializer** Initializers, 6200 unsigned NumInitializers); 6201 6202 void CodeCompleteObjCAtDirective(Scope *S); 6203 void CodeCompleteObjCAtVisibility(Scope *S); 6204 void CodeCompleteObjCAtStatement(Scope *S); 6205 void CodeCompleteObjCAtExpression(Scope *S); 6206 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6207 void CodeCompleteObjCPropertyGetter(Scope *S); 6208 void CodeCompleteObjCPropertySetter(Scope *S); 6209 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6210 bool IsParameter); 6211 void CodeCompleteObjCMessageReceiver(Scope *S); 6212 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6213 IdentifierInfo **SelIdents, 6214 unsigned NumSelIdents, 6215 bool AtArgumentExpression); 6216 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6217 IdentifierInfo **SelIdents, 6218 unsigned NumSelIdents, 6219 bool AtArgumentExpression, 6220 bool IsSuper = false); 6221 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6222 IdentifierInfo **SelIdents, 6223 unsigned NumSelIdents, 6224 bool AtArgumentExpression, 6225 ObjCInterfaceDecl *Super = 0); 6226 void CodeCompleteObjCForCollection(Scope *S, 6227 DeclGroupPtrTy IterationVar); 6228 void CodeCompleteObjCSelector(Scope *S, 6229 IdentifierInfo **SelIdents, 6230 unsigned NumSelIdents); 6231 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6232 unsigned NumProtocols); 6233 void CodeCompleteObjCProtocolDecl(Scope *S); 6234 void CodeCompleteObjCInterfaceDecl(Scope *S); 6235 void CodeCompleteObjCSuperclass(Scope *S, 6236 IdentifierInfo *ClassName, 6237 SourceLocation ClassNameLoc); 6238 void CodeCompleteObjCImplementationDecl(Scope *S); 6239 void CodeCompleteObjCInterfaceCategory(Scope *S, 6240 IdentifierInfo *ClassName, 6241 SourceLocation ClassNameLoc); 6242 void CodeCompleteObjCImplementationCategory(Scope *S, 6243 IdentifierInfo *ClassName, 6244 SourceLocation ClassNameLoc); 6245 void CodeCompleteObjCPropertyDefinition(Scope *S); 6246 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6247 IdentifierInfo *PropertyName); 6248 void CodeCompleteObjCMethodDecl(Scope *S, 6249 bool IsInstanceMethod, 6250 ParsedType ReturnType); 6251 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6252 bool IsInstanceMethod, 6253 bool AtParameterName, 6254 ParsedType ReturnType, 6255 IdentifierInfo **SelIdents, 6256 unsigned NumSelIdents); 6257 void CodeCompletePreprocessorDirective(bool InConditional); 6258 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6259 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6260 void CodeCompletePreprocessorExpression(); 6261 void CodeCompletePreprocessorMacroArgument(Scope *S, 6262 IdentifierInfo *Macro, 6263 MacroInfo *MacroInfo, 6264 unsigned Argument); 6265 void CodeCompleteNaturalLanguage(); 6266 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6267 SmallVectorImpl<CodeCompletionResult> &Results); 6268 //@} 6269 6270 //===--------------------------------------------------------------------===// 6271 // Extra semantic analysis beyond the C type system 6272 6273public: 6274 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6275 unsigned ByteNo) const; 6276 6277private: 6278 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6279 const ArraySubscriptExpr *ASE=0, 6280 bool AllowOnePastEnd=true, bool IndexNegated=false); 6281 void CheckArrayAccess(const Expr *E); 6282 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6283 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6284 Expr **Args, unsigned NumArgs); 6285 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6286 6287 bool CheckablePrintfAttr(const FormatAttr *Format, Expr **Args, 6288 unsigned NumArgs, bool IsCXXMemberCall); 6289 bool CheckObjCString(Expr *Arg); 6290 6291 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6292 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6293 6294 bool SemaBuiltinVAStart(CallExpr *TheCall); 6295 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6296 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6297 6298public: 6299 // Used by C++ template instantiation. 6300 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6301 6302private: 6303 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6304 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6305 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6306 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6307 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6308 AtomicExpr::AtomicOp Op); 6309 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6310 llvm::APSInt &Result); 6311 6312 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6313 bool HasVAListArg, unsigned format_idx, 6314 unsigned firstDataArg, bool isPrintf, 6315 bool inFunctionCall = true); 6316 6317 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6318 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6319 unsigned format_idx, unsigned firstDataArg, 6320 bool isPrintf, bool inFunctionCall); 6321 6322 void CheckNonNullArguments(const NonNullAttr *NonNull, 6323 const Expr * const *ExprArgs, 6324 SourceLocation CallSiteLoc); 6325 6326 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6327 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6328 unsigned NumArgs, bool IsCXXMember, 6329 SourceLocation Loc, SourceRange Range); 6330 void CheckPrintfScanfArguments(Expr **Args, unsigned NumArgs, 6331 bool HasVAListArg, unsigned format_idx, 6332 unsigned firstDataArg, bool isPrintf, 6333 SourceLocation Loc, SourceRange range); 6334 6335 void CheckMemaccessArguments(const CallExpr *Call, 6336 unsigned BId, 6337 IdentifierInfo *FnName); 6338 6339 void CheckStrlcpycatArguments(const CallExpr *Call, 6340 IdentifierInfo *FnName); 6341 6342 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6343 SourceLocation ReturnLoc); 6344 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6345 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6346 6347 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6348 Expr *Init); 6349 6350 /// \brief The parser's current scope. 6351 /// 6352 /// The parser maintains this state here. 6353 Scope *CurScope; 6354 6355protected: 6356 friend class Parser; 6357 friend class InitializationSequence; 6358 friend class ASTReader; 6359 friend class ASTWriter; 6360 6361public: 6362 /// \brief Retrieve the parser's current scope. 6363 /// 6364 /// This routine must only be used when it is certain that semantic analysis 6365 /// and the parser are in precisely the same context, which is not the case 6366 /// when, e.g., we are performing any kind of template instantiation. 6367 /// Therefore, the only safe places to use this scope are in the parser 6368 /// itself and in routines directly invoked from the parser and *never* from 6369 /// template substitution or instantiation. 6370 Scope *getCurScope() const { return CurScope; } 6371 6372 Decl *getObjCDeclContext() const; 6373 6374 DeclContext *getCurLexicalContext() const { 6375 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6376 } 6377 6378 AvailabilityResult getCurContextAvailability() const; 6379}; 6380 6381/// \brief RAII object that enters a new expression evaluation context. 6382class EnterExpressionEvaluationContext { 6383 Sema &Actions; 6384 6385public: 6386 EnterExpressionEvaluationContext(Sema &Actions, 6387 Sema::ExpressionEvaluationContext NewContext) 6388 : Actions(Actions) { 6389 Actions.PushExpressionEvaluationContext(NewContext); 6390 } 6391 6392 ~EnterExpressionEvaluationContext() { 6393 Actions.PopExpressionEvaluationContext(); 6394 } 6395}; 6396 6397} // end namespace clang 6398 6399#endif 6400