Sema.h revision 93c878ee093f2a233c32b29f074e6a3f511e333f
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 ExprResult 1478 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1479 const PartialDiagnostic &NotIntDiag, 1480 const PartialDiagnostic &IncompleteDiag, 1481 const PartialDiagnostic &ExplicitConvDiag, 1482 const PartialDiagnostic &ExplicitConvNote, 1483 const PartialDiagnostic &AmbigDiag, 1484 const PartialDiagnostic &AmbigNote, 1485 const PartialDiagnostic &ConvDiag); 1486 1487 ExprResult PerformObjectMemberConversion(Expr *From, 1488 NestedNameSpecifier *Qualifier, 1489 NamedDecl *FoundDecl, 1490 NamedDecl *Member); 1491 1492 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1493 // TODO: make this is a typesafe union. 1494 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1495 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1496 1497 void AddOverloadCandidate(NamedDecl *Function, 1498 DeclAccessPair FoundDecl, 1499 Expr **Args, unsigned NumArgs, 1500 OverloadCandidateSet &CandidateSet); 1501 1502 void AddOverloadCandidate(FunctionDecl *Function, 1503 DeclAccessPair FoundDecl, 1504 Expr **Args, unsigned NumArgs, 1505 OverloadCandidateSet& CandidateSet, 1506 bool SuppressUserConversions = false, 1507 bool PartialOverloading = false); 1508 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1509 Expr **Args, unsigned NumArgs, 1510 OverloadCandidateSet& CandidateSet, 1511 bool SuppressUserConversions = false); 1512 void AddMethodCandidate(DeclAccessPair FoundDecl, 1513 QualType ObjectType, 1514 Expr::Classification ObjectClassification, 1515 Expr **Args, unsigned NumArgs, 1516 OverloadCandidateSet& CandidateSet, 1517 bool SuppressUserConversion = false); 1518 void AddMethodCandidate(CXXMethodDecl *Method, 1519 DeclAccessPair FoundDecl, 1520 CXXRecordDecl *ActingContext, QualType ObjectType, 1521 Expr::Classification ObjectClassification, 1522 Expr **Args, unsigned NumArgs, 1523 OverloadCandidateSet& CandidateSet, 1524 bool SuppressUserConversions = false); 1525 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1526 DeclAccessPair FoundDecl, 1527 CXXRecordDecl *ActingContext, 1528 TemplateArgumentListInfo *ExplicitTemplateArgs, 1529 QualType ObjectType, 1530 Expr::Classification ObjectClassification, 1531 Expr **Args, unsigned NumArgs, 1532 OverloadCandidateSet& CandidateSet, 1533 bool SuppressUserConversions = false); 1534 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1535 DeclAccessPair FoundDecl, 1536 TemplateArgumentListInfo *ExplicitTemplateArgs, 1537 Expr **Args, unsigned NumArgs, 1538 OverloadCandidateSet& CandidateSet, 1539 bool SuppressUserConversions = false); 1540 void AddConversionCandidate(CXXConversionDecl *Conversion, 1541 DeclAccessPair FoundDecl, 1542 CXXRecordDecl *ActingContext, 1543 Expr *From, QualType ToType, 1544 OverloadCandidateSet& CandidateSet); 1545 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1546 DeclAccessPair FoundDecl, 1547 CXXRecordDecl *ActingContext, 1548 Expr *From, QualType ToType, 1549 OverloadCandidateSet &CandidateSet); 1550 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1551 DeclAccessPair FoundDecl, 1552 CXXRecordDecl *ActingContext, 1553 const FunctionProtoType *Proto, 1554 Expr *Object, Expr **Args, unsigned NumArgs, 1555 OverloadCandidateSet& CandidateSet); 1556 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1557 SourceLocation OpLoc, 1558 Expr **Args, unsigned NumArgs, 1559 OverloadCandidateSet& CandidateSet, 1560 SourceRange OpRange = SourceRange()); 1561 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1562 Expr **Args, unsigned NumArgs, 1563 OverloadCandidateSet& CandidateSet, 1564 bool IsAssignmentOperator = false, 1565 unsigned NumContextualBoolArguments = 0); 1566 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1567 SourceLocation OpLoc, 1568 Expr **Args, unsigned NumArgs, 1569 OverloadCandidateSet& CandidateSet); 1570 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1571 bool Operator, 1572 Expr **Args, unsigned NumArgs, 1573 TemplateArgumentListInfo *ExplicitTemplateArgs, 1574 OverloadCandidateSet& CandidateSet, 1575 bool PartialOverloading = false, 1576 bool StdNamespaceIsAssociated = false); 1577 1578 // Emit as a 'note' the specific overload candidate 1579 void NoteOverloadCandidate(FunctionDecl *Fn, QualType DestType = QualType()); 1580 1581 // Emit as a series of 'note's all template and non-templates 1582 // identified by the expression Expr 1583 void NoteAllOverloadCandidates(Expr* E, QualType DestType = QualType()); 1584 1585 // [PossiblyAFunctionType] --> [Return] 1586 // NonFunctionType --> NonFunctionType 1587 // R (A) --> R(A) 1588 // R (*)(A) --> R (A) 1589 // R (&)(A) --> R (A) 1590 // R (S::*)(A) --> R (A) 1591 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1592 1593 FunctionDecl * 1594 ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, 1595 QualType TargetType, 1596 bool Complain, 1597 DeclAccessPair &Found, 1598 bool *pHadMultipleCandidates = 0); 1599 1600 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1601 bool Complain = false, 1602 DeclAccessPair* Found = 0); 1603 1604 bool ResolveAndFixSingleFunctionTemplateSpecialization( 1605 ExprResult &SrcExpr, 1606 bool DoFunctionPointerConverion = false, 1607 bool Complain = false, 1608 const SourceRange& OpRangeForComplaining = SourceRange(), 1609 QualType DestTypeForComplaining = QualType(), 1610 unsigned DiagIDForComplaining = 0); 1611 1612 1613 Expr *FixOverloadedFunctionReference(Expr *E, 1614 DeclAccessPair FoundDecl, 1615 FunctionDecl *Fn); 1616 ExprResult FixOverloadedFunctionReference(ExprResult, 1617 DeclAccessPair FoundDecl, 1618 FunctionDecl *Fn); 1619 1620 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1621 Expr **Args, unsigned NumArgs, 1622 OverloadCandidateSet &CandidateSet, 1623 bool PartialOverloading = false); 1624 1625 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1626 UnresolvedLookupExpr *ULE, 1627 SourceLocation LParenLoc, 1628 Expr **Args, unsigned NumArgs, 1629 SourceLocation RParenLoc, 1630 Expr *ExecConfig); 1631 1632 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1633 unsigned Opc, 1634 const UnresolvedSetImpl &Fns, 1635 Expr *input); 1636 1637 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1638 unsigned Opc, 1639 const UnresolvedSetImpl &Fns, 1640 Expr *LHS, Expr *RHS); 1641 1642 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1643 SourceLocation RLoc, 1644 Expr *Base,Expr *Idx); 1645 1646 ExprResult 1647 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1648 SourceLocation LParenLoc, Expr **Args, 1649 unsigned NumArgs, SourceLocation RParenLoc); 1650 ExprResult 1651 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1652 Expr **Args, unsigned NumArgs, 1653 SourceLocation RParenLoc); 1654 1655 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1656 SourceLocation OpLoc); 1657 1658 /// CheckCallReturnType - Checks that a call expression's return type is 1659 /// complete. Returns true on failure. The location passed in is the location 1660 /// that best represents the call. 1661 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1662 CallExpr *CE, FunctionDecl *FD); 1663 1664 /// Helpers for dealing with blocks and functions. 1665 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1666 bool CheckParameterNames); 1667 void CheckCXXDefaultArguments(FunctionDecl *FD); 1668 void CheckExtraCXXDefaultArguments(Declarator &D); 1669 Scope *getNonFieldDeclScope(Scope *S); 1670 1671 /// \name Name lookup 1672 /// 1673 /// These routines provide name lookup that is used during semantic 1674 /// analysis to resolve the various kinds of names (identifiers, 1675 /// overloaded operator names, constructor names, etc.) into zero or 1676 /// more declarations within a particular scope. The major entry 1677 /// points are LookupName, which performs unqualified name lookup, 1678 /// and LookupQualifiedName, which performs qualified name lookup. 1679 /// 1680 /// All name lookup is performed based on some specific criteria, 1681 /// which specify what names will be visible to name lookup and how 1682 /// far name lookup should work. These criteria are important both 1683 /// for capturing language semantics (certain lookups will ignore 1684 /// certain names, for example) and for performance, since name 1685 /// lookup is often a bottleneck in the compilation of C++. Name 1686 /// lookup criteria is specified via the LookupCriteria enumeration. 1687 /// 1688 /// The results of name lookup can vary based on the kind of name 1689 /// lookup performed, the current language, and the translation 1690 /// unit. In C, for example, name lookup will either return nothing 1691 /// (no entity found) or a single declaration. In C++, name lookup 1692 /// can additionally refer to a set of overloaded functions or 1693 /// result in an ambiguity. All of the possible results of name 1694 /// lookup are captured by the LookupResult class, which provides 1695 /// the ability to distinguish among them. 1696 //@{ 1697 1698 /// @brief Describes the kind of name lookup to perform. 1699 enum LookupNameKind { 1700 /// Ordinary name lookup, which finds ordinary names (functions, 1701 /// variables, typedefs, etc.) in C and most kinds of names 1702 /// (functions, variables, members, types, etc.) in C++. 1703 LookupOrdinaryName = 0, 1704 /// Tag name lookup, which finds the names of enums, classes, 1705 /// structs, and unions. 1706 LookupTagName, 1707 /// Label name lookup. 1708 LookupLabel, 1709 /// Member name lookup, which finds the names of 1710 /// class/struct/union members. 1711 LookupMemberName, 1712 /// Look up of an operator name (e.g., operator+) for use with 1713 /// operator overloading. This lookup is similar to ordinary name 1714 /// lookup, but will ignore any declarations that are class members. 1715 LookupOperatorName, 1716 /// Look up of a name that precedes the '::' scope resolution 1717 /// operator in C++. This lookup completely ignores operator, object, 1718 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1719 LookupNestedNameSpecifierName, 1720 /// Look up a namespace name within a C++ using directive or 1721 /// namespace alias definition, ignoring non-namespace names (C++ 1722 /// [basic.lookup.udir]p1). 1723 LookupNamespaceName, 1724 /// Look up all declarations in a scope with the given name, 1725 /// including resolved using declarations. This is appropriate 1726 /// for checking redeclarations for a using declaration. 1727 LookupUsingDeclName, 1728 /// Look up an ordinary name that is going to be redeclared as a 1729 /// name with linkage. This lookup ignores any declarations that 1730 /// are outside of the current scope unless they have linkage. See 1731 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1732 LookupRedeclarationWithLinkage, 1733 /// Look up the name of an Objective-C protocol. 1734 LookupObjCProtocolName, 1735 /// Look up implicit 'self' parameter of an objective-c method. 1736 LookupObjCImplicitSelfParam, 1737 /// \brief Look up any declaration with any name. 1738 LookupAnyName 1739 }; 1740 1741 /// \brief Specifies whether (or how) name lookup is being performed for a 1742 /// redeclaration (vs. a reference). 1743 enum RedeclarationKind { 1744 /// \brief The lookup is a reference to this name that is not for the 1745 /// purpose of redeclaring the name. 1746 NotForRedeclaration = 0, 1747 /// \brief The lookup results will be used for redeclaration of a name, 1748 /// if an entity by that name already exists. 1749 ForRedeclaration 1750 }; 1751 1752private: 1753 bool CppLookupName(LookupResult &R, Scope *S); 1754 1755 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1756 CXXSpecialMember SM, 1757 bool ConstArg, 1758 bool VolatileArg, 1759 bool RValueThis, 1760 bool ConstThis, 1761 bool VolatileThis); 1762 1763 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1764 // 1765 // The boolean value will be true to indicate that the namespace was loaded 1766 // from an AST/PCH file, or false otherwise. 1767 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1768 1769 /// \brief Whether we have already loaded known namespaces from an extenal 1770 /// source. 1771 bool LoadedExternalKnownNamespaces; 1772 1773public: 1774 /// \brief Look up a name, looking for a single declaration. Return 1775 /// null if the results were absent, ambiguous, or overloaded. 1776 /// 1777 /// It is preferable to use the elaborated form and explicitly handle 1778 /// ambiguity and overloaded. 1779 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1780 SourceLocation Loc, 1781 LookupNameKind NameKind, 1782 RedeclarationKind Redecl 1783 = NotForRedeclaration); 1784 bool LookupName(LookupResult &R, Scope *S, 1785 bool AllowBuiltinCreation = false); 1786 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1787 bool InUnqualifiedLookup = false); 1788 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1789 bool AllowBuiltinCreation = false, 1790 bool EnteringContext = false); 1791 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc, 1792 RedeclarationKind Redecl 1793 = NotForRedeclaration); 1794 1795 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1796 QualType T1, QualType T2, 1797 UnresolvedSetImpl &Functions); 1798 1799 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1800 SourceLocation GnuLabelLoc = SourceLocation()); 1801 1802 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1803 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1804 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1805 unsigned Quals, 1806 bool *ConstParam = 0); 1807 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1808 bool RValueThis, unsigned ThisQuals, 1809 bool *ConstParam = 0); 1810 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1811 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1812 unsigned ThisQuals); 1813 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1814 1815 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1816 Expr **Args, unsigned NumArgs, 1817 ADLResult &Functions, 1818 bool StdNamespaceIsAssociated = false); 1819 1820 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1821 VisibleDeclConsumer &Consumer, 1822 bool IncludeGlobalScope = true); 1823 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1824 VisibleDeclConsumer &Consumer, 1825 bool IncludeGlobalScope = true); 1826 1827 /// \brief The context in which typo-correction occurs. 1828 /// 1829 /// The typo-correction context affects which keywords (if any) are 1830 /// considered when trying to correct for typos. 1831 enum CorrectTypoContext { 1832 /// \brief An unknown context, where any keyword might be valid. 1833 CTC_Unknown, 1834 /// \brief A context where no keywords are used (e.g. we expect an actual 1835 /// name). 1836 CTC_NoKeywords, 1837 /// \brief A context where we're correcting a type name. 1838 CTC_Type, 1839 /// \brief An expression context. 1840 CTC_Expression, 1841 /// \brief A type cast, or anything else that can be followed by a '<'. 1842 CTC_CXXCasts, 1843 /// \brief A member lookup context. 1844 CTC_MemberLookup, 1845 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1846 CTC_ObjCIvarLookup, 1847 /// \brief An Objective-C property lookup context (e.g., self.prop). 1848 CTC_ObjCPropertyLookup, 1849 /// \brief The receiver of an Objective-C message send within an 1850 /// Objective-C method where 'super' is a valid keyword. 1851 CTC_ObjCMessageReceiver 1852 }; 1853 1854 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1855 Sema::LookupNameKind LookupKind, 1856 Scope *S, CXXScopeSpec *SS, 1857 DeclContext *MemberContext = 0, 1858 bool EnteringContext = false, 1859 CorrectTypoContext CTC = CTC_Unknown, 1860 const ObjCObjectPointerType *OPT = 0); 1861 1862 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1863 Sema::LookupNameKind LookupKind, 1864 Scope *S, CXXScopeSpec *SS, 1865 CorrectionCandidateCallback *CCC, 1866 DeclContext *MemberContext = 0, 1867 bool EnteringContext = false, 1868 const ObjCObjectPointerType *OPT = 0); 1869 1870 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1871 AssociatedNamespaceSet &AssociatedNamespaces, 1872 AssociatedClassSet &AssociatedClasses); 1873 1874 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1875 bool ConsiderLinkage, 1876 bool ExplicitInstantiationOrSpecialization); 1877 1878 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1879 //@} 1880 1881 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1882 SourceLocation IdLoc, 1883 bool TypoCorrection = false); 1884 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1885 Scope *S, bool ForRedeclaration, 1886 SourceLocation Loc); 1887 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1888 Scope *S); 1889 void AddKnownFunctionAttributes(FunctionDecl *FD); 1890 1891 // More parsing and symbol table subroutines. 1892 1893 // Decl attributes - this routine is the top level dispatcher. 1894 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1895 bool NonInheritable = true, bool Inheritable = true); 1896 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1897 bool NonInheritable = true, bool Inheritable = true); 1898 bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl, 1899 const AttributeList *AttrList); 1900 1901 void checkUnusedDeclAttributes(Declarator &D); 1902 1903 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1904 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1905 bool CheckNoReturnAttr(const AttributeList &attr); 1906 1907 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1908 bool &IncompleteImpl, unsigned DiagID); 1909 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1910 ObjCMethodDecl *MethodDecl, 1911 bool IsProtocolMethodDecl); 1912 1913 void CheckConflictingOverridingMethod(ObjCMethodDecl *Method, 1914 ObjCMethodDecl *Overridden, 1915 bool IsProtocolMethodDecl); 1916 1917 /// WarnExactTypedMethods - This routine issues a warning if method 1918 /// implementation declaration matches exactly that of its declaration. 1919 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1920 ObjCMethodDecl *MethodDecl, 1921 bool IsProtocolMethodDecl); 1922 1923 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1924 ObjCInterfaceDecl *IDecl); 1925 1926 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1927 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1928 1929 /// CheckProtocolMethodDefs - This routine checks unimplemented 1930 /// methods declared in protocol, and those referenced by it. 1931 /// \param IDecl - Used for checking for methods which may have been 1932 /// inherited. 1933 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1934 ObjCProtocolDecl *PDecl, 1935 bool& IncompleteImpl, 1936 const SelectorSet &InsMap, 1937 const SelectorSet &ClsMap, 1938 ObjCContainerDecl *CDecl); 1939 1940 /// CheckImplementationIvars - This routine checks if the instance variables 1941 /// listed in the implelementation match those listed in the interface. 1942 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1943 ObjCIvarDecl **Fields, unsigned nIvars, 1944 SourceLocation Loc); 1945 1946 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1947 /// remains unimplemented in the class or category @implementation. 1948 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1949 ObjCContainerDecl* IDecl, 1950 bool IncompleteImpl = false); 1951 1952 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1953 /// which must be implemented by this implementation. 1954 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1955 ObjCContainerDecl *CDecl, 1956 const SelectorSet &InsMap); 1957 1958 /// DefaultSynthesizeProperties - This routine default synthesizes all 1959 /// properties which must be synthesized in class's @implementation. 1960 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1961 ObjCInterfaceDecl *IDecl); 1962 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1963 1964 /// CollectImmediateProperties - This routine collects all properties in 1965 /// the class and its conforming protocols; but not those it its super class. 1966 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1967 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1968 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1969 1970 1971 /// LookupPropertyDecl - Looks up a property in the current class and all 1972 /// its protocols. 1973 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1974 IdentifierInfo *II); 1975 1976 /// Called by ActOnProperty to handle @property declarations in 1977 //// class extensions. 1978 Decl *HandlePropertyInClassExtension(Scope *S, 1979 SourceLocation AtLoc, 1980 FieldDeclarator &FD, 1981 Selector GetterSel, 1982 Selector SetterSel, 1983 const bool isAssign, 1984 const bool isReadWrite, 1985 const unsigned Attributes, 1986 const unsigned AttributesAsWritten, 1987 bool *isOverridingProperty, 1988 TypeSourceInfo *T, 1989 tok::ObjCKeywordKind MethodImplKind); 1990 1991 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1992 /// handle creating the ObjcPropertyDecl for a category or @interface. 1993 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1994 ObjCContainerDecl *CDecl, 1995 SourceLocation AtLoc, 1996 FieldDeclarator &FD, 1997 Selector GetterSel, 1998 Selector SetterSel, 1999 const bool isAssign, 2000 const bool isReadWrite, 2001 const unsigned Attributes, 2002 const unsigned AttributesAsWritten, 2003 TypeSourceInfo *T, 2004 tok::ObjCKeywordKind MethodImplKind, 2005 DeclContext *lexicalDC = 0); 2006 2007 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 2008 /// warning) when atomic property has one but not the other user-declared 2009 /// setter or getter. 2010 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 2011 ObjCContainerDecl* IDecl); 2012 2013 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 2014 2015 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 2016 2017 enum MethodMatchStrategy { 2018 MMS_loose, 2019 MMS_strict 2020 }; 2021 2022 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 2023 /// true, or false, accordingly. 2024 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 2025 const ObjCMethodDecl *PrevMethod, 2026 MethodMatchStrategy strategy = MMS_strict); 2027 2028 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 2029 /// or protocol against those declared in their implementations. 2030 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 2031 const SelectorSet &ClsMap, 2032 SelectorSet &InsMapSeen, 2033 SelectorSet &ClsMapSeen, 2034 ObjCImplDecl* IMPDecl, 2035 ObjCContainerDecl* IDecl, 2036 bool &IncompleteImpl, 2037 bool ImmediateClass, 2038 bool WarnExactMatch=false); 2039 2040 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 2041 /// category matches with those implemented in its primary class and 2042 /// warns each time an exact match is found. 2043 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 2044 2045private: 2046 /// AddMethodToGlobalPool - Add an instance or factory method to the global 2047 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 2048 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 2049 2050 /// LookupMethodInGlobalPool - Returns the instance or factory method and 2051 /// optionally warns if there are multiple signatures. 2052 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 2053 bool receiverIdOrClass, 2054 bool warn, bool instance); 2055 2056public: 2057 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 2058 /// unit are added to a global pool. This allows us to efficiently associate 2059 /// a selector with a method declaraation for purposes of typechecking 2060 /// messages sent to "id" (where the class of the object is unknown). 2061 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2062 AddMethodToGlobalPool(Method, impl, /*instance*/true); 2063 } 2064 2065 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 2066 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 2067 AddMethodToGlobalPool(Method, impl, /*instance*/false); 2068 } 2069 2070 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 2071 /// pool. 2072 void AddAnyMethodToGlobalPool(Decl *D); 2073 2074 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 2075 /// there are multiple signatures. 2076 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 2077 bool receiverIdOrClass=false, 2078 bool warn=true) { 2079 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2080 warn, /*instance*/true); 2081 } 2082 2083 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 2084 /// there are multiple signatures. 2085 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 2086 bool receiverIdOrClass=false, 2087 bool warn=true) { 2088 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 2089 warn, /*instance*/false); 2090 } 2091 2092 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 2093 /// implementation. 2094 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 2095 2096 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 2097 /// initialization. 2098 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 2099 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2100 2101 //===--------------------------------------------------------------------===// 2102 // Statement Parsing Callbacks: SemaStmt.cpp. 2103public: 2104 class FullExprArg { 2105 public: 2106 FullExprArg(Sema &actions) : E(0) { } 2107 2108 // FIXME: The const_cast here is ugly. RValue references would make this 2109 // much nicer (or we could duplicate a bunch of the move semantics 2110 // emulation code from Ownership.h). 2111 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2112 2113 ExprResult release() { 2114 return move(E); 2115 } 2116 2117 Expr *get() const { return E; } 2118 2119 Expr *operator->() { 2120 return E; 2121 } 2122 2123 private: 2124 // FIXME: No need to make the entire Sema class a friend when it's just 2125 // Sema::MakeFullExpr that needs access to the constructor below. 2126 friend class Sema; 2127 2128 explicit FullExprArg(Expr *expr) : E(expr) {} 2129 2130 Expr *E; 2131 }; 2132 2133 FullExprArg MakeFullExpr(Expr *Arg) { 2134 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2135 } 2136 2137 StmtResult ActOnExprStmt(FullExprArg Expr); 2138 2139 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2140 bool HasLeadingEmptyMacro = false); 2141 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2142 MultiStmtArg Elts, 2143 bool isStmtExpr); 2144 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2145 SourceLocation StartLoc, 2146 SourceLocation EndLoc); 2147 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2148 StmtResult ActOnForEachLValueExpr(Expr *E); 2149 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2150 SourceLocation DotDotDotLoc, Expr *RHSVal, 2151 SourceLocation ColonLoc); 2152 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2153 2154 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2155 SourceLocation ColonLoc, 2156 Stmt *SubStmt, Scope *CurScope); 2157 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2158 SourceLocation ColonLoc, Stmt *SubStmt); 2159 2160 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2161 FullExprArg CondVal, Decl *CondVar, 2162 Stmt *ThenVal, 2163 SourceLocation ElseLoc, Stmt *ElseVal); 2164 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2165 Expr *Cond, 2166 Decl *CondVar); 2167 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2168 Stmt *Switch, Stmt *Body); 2169 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2170 FullExprArg Cond, 2171 Decl *CondVar, Stmt *Body); 2172 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2173 SourceLocation WhileLoc, 2174 SourceLocation CondLParen, Expr *Cond, 2175 SourceLocation CondRParen); 2176 2177 StmtResult ActOnForStmt(SourceLocation ForLoc, 2178 SourceLocation LParenLoc, 2179 Stmt *First, FullExprArg Second, 2180 Decl *SecondVar, 2181 FullExprArg Third, 2182 SourceLocation RParenLoc, 2183 Stmt *Body); 2184 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2185 Expr *collection); 2186 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2187 SourceLocation LParenLoc, 2188 Stmt *First, Expr *Second, 2189 SourceLocation RParenLoc, Stmt *Body); 2190 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2191 SourceLocation LParenLoc, Stmt *LoopVar, 2192 SourceLocation ColonLoc, Expr *Collection, 2193 SourceLocation RParenLoc); 2194 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2195 SourceLocation ColonLoc, 2196 Stmt *RangeDecl, Stmt *BeginEndDecl, 2197 Expr *Cond, Expr *Inc, 2198 Stmt *LoopVarDecl, 2199 SourceLocation RParenLoc); 2200 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2201 2202 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2203 SourceLocation LabelLoc, 2204 LabelDecl *TheDecl); 2205 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2206 SourceLocation StarLoc, 2207 Expr *DestExp); 2208 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2209 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2210 2211 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2212 bool AllowFunctionParameters); 2213 2214 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2215 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2216 2217 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2218 bool IsSimple, bool IsVolatile, 2219 unsigned NumOutputs, unsigned NumInputs, 2220 IdentifierInfo **Names, 2221 MultiExprArg Constraints, 2222 MultiExprArg Exprs, 2223 Expr *AsmString, 2224 MultiExprArg Clobbers, 2225 SourceLocation RParenLoc, 2226 bool MSAsm = false); 2227 2228 2229 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2230 SourceLocation StartLoc, 2231 SourceLocation IdLoc, IdentifierInfo *Id, 2232 bool Invalid = false); 2233 2234 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2235 2236 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2237 Decl *Parm, Stmt *Body); 2238 2239 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2240 2241 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2242 MultiStmtArg Catch, Stmt *Finally); 2243 2244 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2245 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2246 Scope *CurScope); 2247 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2248 Expr *operand); 2249 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2250 Expr *SynchExpr, 2251 Stmt *SynchBody); 2252 2253 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2254 2255 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2256 SourceLocation StartLoc, 2257 SourceLocation IdLoc, 2258 IdentifierInfo *Id); 2259 2260 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2261 2262 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2263 Decl *ExDecl, Stmt *HandlerBlock); 2264 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2265 MultiStmtArg Handlers); 2266 2267 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2268 SourceLocation TryLoc, 2269 Stmt *TryBlock, 2270 Stmt *Handler); 2271 2272 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2273 Expr *FilterExpr, 2274 Stmt *Block); 2275 2276 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2277 Stmt *Block); 2278 2279 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2280 2281 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2282 2283 /// \brief If it's a file scoped decl that must warn if not used, keep track 2284 /// of it. 2285 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2286 2287 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2288 /// whose result is unused, warn. 2289 void DiagnoseUnusedExprResult(const Stmt *S); 2290 void DiagnoseUnusedDecl(const NamedDecl *ND); 2291 2292 ParsingDeclState PushParsingDeclaration() { 2293 return DelayedDiagnostics.pushParsingDecl(); 2294 } 2295 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2296 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2297 } 2298 2299 typedef ProcessingContextState ParsingClassState; 2300 ParsingClassState PushParsingClass() { 2301 return DelayedDiagnostics.pushContext(); 2302 } 2303 void PopParsingClass(ParsingClassState state) { 2304 DelayedDiagnostics.popContext(state); 2305 } 2306 2307 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2308 SourceLocation Loc, 2309 const ObjCInterfaceDecl *UnknownObjCClass=0); 2310 2311 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2312 2313 bool makeUnavailableInSystemHeader(SourceLocation loc, 2314 StringRef message); 2315 2316 //===--------------------------------------------------------------------===// 2317 // Expression Parsing Callbacks: SemaExpr.cpp. 2318 2319 bool CanUseDecl(NamedDecl *D); 2320 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2321 const ObjCInterfaceDecl *UnknownObjCClass=0); 2322 AvailabilityResult DiagnoseAvailabilityOfDecl(NamedDecl *D, 2323 SourceLocation Loc, 2324 const ObjCInterfaceDecl *UnknownObjCClass); 2325 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2326 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2327 ObjCMethodDecl *Getter, 2328 SourceLocation Loc); 2329 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2330 Expr **Args, unsigned NumArgs); 2331 2332 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2333 2334 void PopExpressionEvaluationContext(); 2335 2336 void DiscardCleanupsInEvaluationContext(); 2337 2338 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2339 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2340 void MarkDeclarationsReferencedInExpr(Expr *E); 2341 2342 /// \brief Try to recover by turning the given expression into a 2343 /// call. Returns true if recovery was attempted or an error was 2344 /// emitted; this may also leave the ExprResult invalid. 2345 bool tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD, 2346 bool ForceComplain = false, 2347 bool (*IsPlausibleResult)(QualType) = 0); 2348 2349 /// \brief Figure out if an expression could be turned into a call. 2350 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2351 UnresolvedSetImpl &NonTemplateOverloads); 2352 2353 /// \brief Conditionally issue a diagnostic based on the current 2354 /// evaluation context. 2355 /// 2356 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2357 /// the function body is parsed, and then do a basic reachability analysis to 2358 /// determine if the statement is reachable. If it is unreachable, the 2359 /// diagnostic will not be emitted. 2360 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2361 const PartialDiagnostic &PD); 2362 2363 // Primary Expressions. 2364 SourceRange getExprRange(Expr *E) const; 2365 2366 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2367 bool HasTrailingLParen, bool IsAddressOfOperand); 2368 2369 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2370 TemplateArgumentListInfo &Buffer, 2371 DeclarationNameInfo &NameInfo, 2372 const TemplateArgumentListInfo *&TemplateArgs); 2373 2374 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2375 CorrectTypoContext CTC = CTC_Unknown, 2376 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2377 Expr **Args = 0, unsigned NumArgs = 0); 2378 2379 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2380 IdentifierInfo *II, 2381 bool AllowBuiltinCreation=false); 2382 2383 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2384 const DeclarationNameInfo &NameInfo, 2385 bool isAddressOfOperand, 2386 const TemplateArgumentListInfo *TemplateArgs); 2387 2388 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2389 ExprValueKind VK, 2390 SourceLocation Loc, 2391 const CXXScopeSpec *SS = 0); 2392 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2393 ExprValueKind VK, 2394 const DeclarationNameInfo &NameInfo, 2395 const CXXScopeSpec *SS = 0); 2396 ExprResult 2397 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2398 SourceLocation nameLoc, 2399 IndirectFieldDecl *indirectField, 2400 Expr *baseObjectExpr = 0, 2401 SourceLocation opLoc = SourceLocation()); 2402 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2403 LookupResult &R, 2404 const TemplateArgumentListInfo *TemplateArgs); 2405 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2406 LookupResult &R, 2407 const TemplateArgumentListInfo *TemplateArgs, 2408 bool IsDefiniteInstance); 2409 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2410 const LookupResult &R, 2411 bool HasTrailingLParen); 2412 2413 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2414 const DeclarationNameInfo &NameInfo); 2415 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2416 const DeclarationNameInfo &NameInfo, 2417 const TemplateArgumentListInfo *TemplateArgs); 2418 2419 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2420 LookupResult &R, 2421 bool NeedsADL); 2422 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2423 const DeclarationNameInfo &NameInfo, 2424 NamedDecl *D); 2425 2426 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2427 ExprResult ActOnNumericConstant(const Token &Tok); 2428 ExprResult ActOnCharacterConstant(const Token &Tok); 2429 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2430 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2431 SourceLocation R, 2432 MultiExprArg Val); 2433 2434 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2435 /// fragments (e.g. "foo" "bar" L"baz"). 2436 ExprResult ActOnStringLiteral(const Token *StringToks, 2437 unsigned NumStringToks); 2438 2439 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2440 SourceLocation DefaultLoc, 2441 SourceLocation RParenLoc, 2442 Expr *ControllingExpr, 2443 MultiTypeArg ArgTypes, 2444 MultiExprArg ArgExprs); 2445 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2446 SourceLocation DefaultLoc, 2447 SourceLocation RParenLoc, 2448 Expr *ControllingExpr, 2449 TypeSourceInfo **Types, 2450 Expr **Exprs, 2451 unsigned NumAssocs); 2452 2453 // Binary/Unary Operators. 'Tok' is the token for the operator. 2454 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2455 Expr *InputExpr); 2456 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2457 UnaryOperatorKind Opc, Expr *Input); 2458 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2459 tok::TokenKind Op, Expr *Input); 2460 2461 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2462 SourceLocation OpLoc, 2463 UnaryExprOrTypeTrait ExprKind, 2464 SourceRange R); 2465 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2466 UnaryExprOrTypeTrait ExprKind); 2467 ExprResult 2468 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2469 UnaryExprOrTypeTrait ExprKind, 2470 bool IsType, void *TyOrEx, 2471 const SourceRange &ArgRange); 2472 2473 ExprResult CheckPlaceholderExpr(Expr *E); 2474 bool CheckVecStepExpr(Expr *E); 2475 2476 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2477 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2478 SourceRange ExprRange, 2479 UnaryExprOrTypeTrait ExprKind); 2480 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2481 SourceLocation OpLoc, 2482 IdentifierInfo &Name, 2483 SourceLocation NameLoc, 2484 SourceLocation RParenLoc); 2485 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2486 tok::TokenKind Kind, Expr *Input); 2487 2488 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2489 Expr *Idx, SourceLocation RLoc); 2490 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2491 Expr *Idx, SourceLocation RLoc); 2492 2493 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2494 SourceLocation OpLoc, bool IsArrow, 2495 CXXScopeSpec &SS, 2496 NamedDecl *FirstQualifierInScope, 2497 const DeclarationNameInfo &NameInfo, 2498 const TemplateArgumentListInfo *TemplateArgs); 2499 2500 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2501 SourceLocation OpLoc, bool IsArrow, 2502 const CXXScopeSpec &SS, 2503 NamedDecl *FirstQualifierInScope, 2504 LookupResult &R, 2505 const TemplateArgumentListInfo *TemplateArgs, 2506 bool SuppressQualifierCheck = false); 2507 2508 ExprResult PerformMemberExprBaseConversion(Expr *Base, bool IsArrow); 2509 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2510 bool &IsArrow, SourceLocation OpLoc, 2511 CXXScopeSpec &SS, 2512 Decl *ObjCImpDecl, 2513 bool HasTemplateArgs); 2514 2515 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2516 const CXXScopeSpec &SS, 2517 const LookupResult &R); 2518 2519 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2520 bool IsArrow, SourceLocation OpLoc, 2521 const CXXScopeSpec &SS, 2522 NamedDecl *FirstQualifierInScope, 2523 const DeclarationNameInfo &NameInfo, 2524 const TemplateArgumentListInfo *TemplateArgs); 2525 2526 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2527 SourceLocation OpLoc, 2528 tok::TokenKind OpKind, 2529 CXXScopeSpec &SS, 2530 UnqualifiedId &Member, 2531 Decl *ObjCImpDecl, 2532 bool HasTrailingLParen); 2533 2534 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2535 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2536 FunctionDecl *FDecl, 2537 const FunctionProtoType *Proto, 2538 Expr **Args, unsigned NumArgs, 2539 SourceLocation RParenLoc, 2540 bool ExecConfig = false); 2541 void CheckStaticArrayArgument(SourceLocation CallLoc, 2542 ParmVarDecl *Param, 2543 const Expr *ArgExpr); 2544 2545 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2546 /// This provides the location of the left/right parens and a list of comma 2547 /// locations. 2548 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2549 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2550 Expr *ExecConfig = 0, bool IsExecConfig = false); 2551 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2552 SourceLocation LParenLoc, 2553 Expr **Args, unsigned NumArgs, 2554 SourceLocation RParenLoc, 2555 Expr *Config = 0, 2556 bool IsExecConfig = false); 2557 2558 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2559 MultiExprArg ExecConfig, 2560 SourceLocation GGGLoc); 2561 2562 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2563 Declarator &D, ParsedType &Ty, 2564 SourceLocation RParenLoc, Expr *CastExpr); 2565 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2566 TypeSourceInfo *Ty, 2567 SourceLocation RParenLoc, 2568 Expr *Op); 2569 CastKind PrepareScalarCast(ExprResult &src, QualType destType); 2570 2571 /// \brief Build an altivec or OpenCL literal. 2572 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2573 SourceLocation RParenLoc, Expr *E, 2574 TypeSourceInfo *TInfo); 2575 2576 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2577 2578 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2579 ParsedType Ty, 2580 SourceLocation RParenLoc, 2581 Expr *InitExpr); 2582 2583 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2584 TypeSourceInfo *TInfo, 2585 SourceLocation RParenLoc, 2586 Expr *LiteralExpr); 2587 2588 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2589 MultiExprArg InitArgList, 2590 SourceLocation RBraceLoc); 2591 2592 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2593 SourceLocation Loc, 2594 bool GNUSyntax, 2595 ExprResult Init); 2596 2597 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2598 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2599 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2600 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2601 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2602 Expr *LHSExpr, Expr *RHSExpr); 2603 2604 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2605 /// in the case of a the GNU conditional expr extension. 2606 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2607 SourceLocation ColonLoc, 2608 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2609 2610 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2611 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2612 LabelDecl *TheDecl); 2613 2614 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2615 SourceLocation RPLoc); // "({..})" 2616 2617 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2618 struct OffsetOfComponent { 2619 SourceLocation LocStart, LocEnd; 2620 bool isBrackets; // true if [expr], false if .ident 2621 union { 2622 IdentifierInfo *IdentInfo; 2623 Expr *E; 2624 } U; 2625 }; 2626 2627 /// __builtin_offsetof(type, a.b[123][456].c) 2628 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2629 TypeSourceInfo *TInfo, 2630 OffsetOfComponent *CompPtr, 2631 unsigned NumComponents, 2632 SourceLocation RParenLoc); 2633 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2634 SourceLocation BuiltinLoc, 2635 SourceLocation TypeLoc, 2636 ParsedType ParsedArgTy, 2637 OffsetOfComponent *CompPtr, 2638 unsigned NumComponents, 2639 SourceLocation RParenLoc); 2640 2641 // __builtin_choose_expr(constExpr, expr1, expr2) 2642 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2643 Expr *CondExpr, Expr *LHSExpr, 2644 Expr *RHSExpr, SourceLocation RPLoc); 2645 2646 // __builtin_va_arg(expr, type) 2647 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2648 SourceLocation RPLoc); 2649 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2650 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2651 2652 // __null 2653 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2654 2655 bool CheckCaseExpression(Expr *E); 2656 2657 /// \brief Describes the result of an "if-exists" condition check. 2658 enum IfExistsResult { 2659 /// \brief The symbol exists. 2660 IER_Exists, 2661 2662 /// \brief The symbol does not exist. 2663 IER_DoesNotExist, 2664 2665 /// \brief The name is a dependent name, so the results will differ 2666 /// from one instantiation to the next. 2667 IER_Dependent, 2668 2669 /// \brief An error occurred. 2670 IER_Error 2671 }; 2672 2673 IfExistsResult 2674 CheckMicrosoftIfExistsSymbol(Scope *S, CXXScopeSpec &SS, 2675 const DeclarationNameInfo &TargetNameInfo); 2676 2677 IfExistsResult 2678 CheckMicrosoftIfExistsSymbol(Scope *S, SourceLocation KeywordLoc, 2679 bool IsIfExists, CXXScopeSpec &SS, 2680 UnqualifiedId &Name); 2681 2682 StmtResult BuildMSDependentExistsStmt(SourceLocation KeywordLoc, 2683 bool IsIfExists, 2684 NestedNameSpecifierLoc QualifierLoc, 2685 DeclarationNameInfo NameInfo, 2686 Stmt *Nested); 2687 StmtResult ActOnMSDependentExistsStmt(SourceLocation KeywordLoc, 2688 bool IsIfExists, 2689 CXXScopeSpec &SS, UnqualifiedId &Name, 2690 Stmt *Nested); 2691 2692 //===------------------------- "Block" Extension ------------------------===// 2693 2694 /// ActOnBlockStart - This callback is invoked when a block literal is 2695 /// started. 2696 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2697 2698 /// ActOnBlockArguments - This callback allows processing of block arguments. 2699 /// If there are no arguments, this is still invoked. 2700 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2701 2702 /// ActOnBlockError - If there is an error parsing a block, this callback 2703 /// is invoked to pop the information about the block from the action impl. 2704 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2705 2706 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2707 /// literal was successfully completed. ^(int x){...} 2708 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2709 Scope *CurScope); 2710 2711 //===---------------------------- OpenCL Features -----------------------===// 2712 2713 /// __builtin_astype(...) 2714 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2715 SourceLocation BuiltinLoc, 2716 SourceLocation RParenLoc); 2717 2718 //===---------------------------- C++ Features --------------------------===// 2719 2720 // Act on C++ namespaces 2721 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2722 SourceLocation NamespaceLoc, 2723 SourceLocation IdentLoc, 2724 IdentifierInfo *Ident, 2725 SourceLocation LBrace, 2726 AttributeList *AttrList); 2727 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2728 2729 NamespaceDecl *getStdNamespace() const; 2730 NamespaceDecl *getOrCreateStdNamespace(); 2731 2732 CXXRecordDecl *getStdBadAlloc() const; 2733 2734 /// \brief Tests whether Ty is an instance of std::initializer_list and, if 2735 /// it is and Element is not NULL, assigns the element type to Element. 2736 bool isStdInitializerList(QualType Ty, QualType *Element); 2737 2738 /// \brief Looks for the std::initializer_list template and instantiates it 2739 /// with Element, or emits an error if it's not found. 2740 /// 2741 /// \returns The instantiated template, or null on error. 2742 QualType BuildStdInitializerList(QualType Element, SourceLocation Loc); 2743 2744 /// \brief Determine whether Ctor is an initializer-list constructor, as 2745 /// defined in [dcl.init.list]p2. 2746 bool isInitListConstructor(const CXXConstructorDecl *Ctor); 2747 2748 Decl *ActOnUsingDirective(Scope *CurScope, 2749 SourceLocation UsingLoc, 2750 SourceLocation NamespcLoc, 2751 CXXScopeSpec &SS, 2752 SourceLocation IdentLoc, 2753 IdentifierInfo *NamespcName, 2754 AttributeList *AttrList); 2755 2756 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2757 2758 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2759 SourceLocation NamespaceLoc, 2760 SourceLocation AliasLoc, 2761 IdentifierInfo *Alias, 2762 CXXScopeSpec &SS, 2763 SourceLocation IdentLoc, 2764 IdentifierInfo *Ident); 2765 2766 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2767 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2768 const LookupResult &PreviousDecls); 2769 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2770 NamedDecl *Target); 2771 2772 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2773 bool isTypeName, 2774 const CXXScopeSpec &SS, 2775 SourceLocation NameLoc, 2776 const LookupResult &Previous); 2777 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2778 const CXXScopeSpec &SS, 2779 SourceLocation NameLoc); 2780 2781 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2782 SourceLocation UsingLoc, 2783 CXXScopeSpec &SS, 2784 const DeclarationNameInfo &NameInfo, 2785 AttributeList *AttrList, 2786 bool IsInstantiation, 2787 bool IsTypeName, 2788 SourceLocation TypenameLoc); 2789 2790 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2791 2792 Decl *ActOnUsingDeclaration(Scope *CurScope, 2793 AccessSpecifier AS, 2794 bool HasUsingKeyword, 2795 SourceLocation UsingLoc, 2796 CXXScopeSpec &SS, 2797 UnqualifiedId &Name, 2798 AttributeList *AttrList, 2799 bool IsTypeName, 2800 SourceLocation TypenameLoc); 2801 Decl *ActOnAliasDeclaration(Scope *CurScope, 2802 AccessSpecifier AS, 2803 MultiTemplateParamsArg TemplateParams, 2804 SourceLocation UsingLoc, 2805 UnqualifiedId &Name, 2806 TypeResult Type); 2807 2808 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2809 /// ActOnDeclarator, when a C++ direct initializer is present. 2810 /// e.g: "int x(1);" 2811 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2812 SourceLocation LParenLoc, 2813 MultiExprArg Exprs, 2814 SourceLocation RParenLoc, 2815 bool TypeMayContainAuto); 2816 2817 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2818 /// and sets it as the initializer for the the passed in VarDecl. 2819 bool InitializeVarWithConstructor(VarDecl *VD, 2820 CXXConstructorDecl *Constructor, 2821 MultiExprArg Exprs, 2822 bool HadMultipleCandidates); 2823 2824 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2825 /// including handling of its default argument expressions. 2826 /// 2827 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2828 ExprResult 2829 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2830 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2831 bool HadMultipleCandidates, bool RequiresZeroInit, 2832 unsigned ConstructKind, SourceRange ParenRange); 2833 2834 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2835 // the constructor can be elidable? 2836 ExprResult 2837 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2838 CXXConstructorDecl *Constructor, bool Elidable, 2839 MultiExprArg Exprs, bool HadMultipleCandidates, 2840 bool RequiresZeroInit, unsigned ConstructKind, 2841 SourceRange ParenRange); 2842 2843 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2844 /// the default expr if needed. 2845 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2846 FunctionDecl *FD, 2847 ParmVarDecl *Param); 2848 2849 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2850 /// constructed variable. 2851 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2852 2853 /// \brief Helper class that collects exception specifications for 2854 /// implicitly-declared special member functions. 2855 class ImplicitExceptionSpecification { 2856 // Pointer to allow copying 2857 ASTContext *Context; 2858 // We order exception specifications thus: 2859 // noexcept is the most restrictive, but is only used in C++0x. 2860 // throw() comes next. 2861 // Then a throw(collected exceptions) 2862 // Finally no specification. 2863 // throw(...) is used instead if any called function uses it. 2864 // 2865 // If this exception specification cannot be known yet (for instance, 2866 // because this is the exception specification for a defaulted default 2867 // constructor and we haven't finished parsing the deferred parts of the 2868 // class yet), the C++0x standard does not specify how to behave. We 2869 // record this as an 'unknown' exception specification, which overrules 2870 // any other specification (even 'none', to keep this rule simple). 2871 ExceptionSpecificationType ComputedEST; 2872 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2873 SmallVector<QualType, 4> Exceptions; 2874 2875 void ClearExceptions() { 2876 ExceptionsSeen.clear(); 2877 Exceptions.clear(); 2878 } 2879 2880 public: 2881 explicit ImplicitExceptionSpecification(ASTContext &Context) 2882 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2883 if (!Context.getLangOptions().CPlusPlus0x) 2884 ComputedEST = EST_DynamicNone; 2885 } 2886 2887 /// \brief Get the computed exception specification type. 2888 ExceptionSpecificationType getExceptionSpecType() const { 2889 assert(ComputedEST != EST_ComputedNoexcept && 2890 "noexcept(expr) should not be a possible result"); 2891 return ComputedEST; 2892 } 2893 2894 /// \brief The number of exceptions in the exception specification. 2895 unsigned size() const { return Exceptions.size(); } 2896 2897 /// \brief The set of exceptions in the exception specification. 2898 const QualType *data() const { return Exceptions.data(); } 2899 2900 /// \brief Integrate another called method into the collected data. 2901 void CalledDecl(CXXMethodDecl *Method); 2902 2903 /// \brief Integrate an invoked expression into the collected data. 2904 void CalledExpr(Expr *E); 2905 2906 /// \brief Specify that the exception specification can't be detemined yet. 2907 void SetDelayed() { 2908 ClearExceptions(); 2909 ComputedEST = EST_Delayed; 2910 } 2911 2912 FunctionProtoType::ExtProtoInfo getEPI() const { 2913 FunctionProtoType::ExtProtoInfo EPI; 2914 EPI.ExceptionSpecType = getExceptionSpecType(); 2915 EPI.NumExceptions = size(); 2916 EPI.Exceptions = data(); 2917 return EPI; 2918 } 2919 }; 2920 2921 /// \brief Determine what sort of exception specification a defaulted 2922 /// copy constructor of a class will have. 2923 ImplicitExceptionSpecification 2924 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2925 2926 /// \brief Determine what sort of exception specification a defaulted 2927 /// default constructor of a class will have, and whether the parameter 2928 /// will be const. 2929 std::pair<ImplicitExceptionSpecification, bool> 2930 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2931 2932 /// \brief Determine what sort of exception specification a defautled 2933 /// copy assignment operator of a class will have, and whether the 2934 /// parameter will be const. 2935 std::pair<ImplicitExceptionSpecification, bool> 2936 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2937 2938 /// \brief Determine what sort of exception specification a defaulted move 2939 /// constructor of a class will have. 2940 ImplicitExceptionSpecification 2941 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2942 2943 /// \brief Determine what sort of exception specification a defaulted move 2944 /// assignment operator of a class will have. 2945 ImplicitExceptionSpecification 2946 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2947 2948 /// \brief Determine what sort of exception specification a defaulted 2949 /// destructor of a class will have. 2950 ImplicitExceptionSpecification 2951 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2952 2953 /// \brief Determine if a special member function should have a deleted 2954 /// definition when it is defaulted. 2955 bool ShouldDeleteSpecialMember(CXXMethodDecl *MD, CXXSpecialMember CSM); 2956 2957 /// \brief Determine if a defaulted copy assignment operator ought to be 2958 /// deleted. 2959 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2960 2961 /// \brief Determine if a defaulted move assignment operator ought to be 2962 /// deleted. 2963 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2964 2965 /// \brief Determine if a defaulted destructor ought to be deleted. 2966 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2967 2968 /// \brief Declare the implicit default constructor for the given class. 2969 /// 2970 /// \param ClassDecl The class declaration into which the implicit 2971 /// default constructor will be added. 2972 /// 2973 /// \returns The implicitly-declared default constructor. 2974 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2975 CXXRecordDecl *ClassDecl); 2976 2977 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2978 /// defining this constructor as the default constructor. 2979 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2980 CXXConstructorDecl *Constructor); 2981 2982 /// \brief Declare the implicit destructor for the given class. 2983 /// 2984 /// \param ClassDecl The class declaration into which the implicit 2985 /// destructor will be added. 2986 /// 2987 /// \returns The implicitly-declared destructor. 2988 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2989 2990 /// DefineImplicitDestructor - Checks for feasibility of 2991 /// defining this destructor as the default destructor. 2992 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2993 CXXDestructorDecl *Destructor); 2994 2995 /// \brief Build an exception spec for destructors that don't have one. 2996 /// 2997 /// C++11 says that user-defined destructors with no exception spec get one 2998 /// that looks as if the destructor was implicitly declared. 2999 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 3000 CXXDestructorDecl *Destructor); 3001 3002 /// \brief Declare all inherited constructors for the given class. 3003 /// 3004 /// \param ClassDecl The class declaration into which the inherited 3005 /// constructors will be added. 3006 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 3007 3008 /// \brief Declare the implicit copy constructor for the given class. 3009 /// 3010 /// \param ClassDecl The class declaration into which the implicit 3011 /// copy constructor will be added. 3012 /// 3013 /// \returns The implicitly-declared copy constructor. 3014 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 3015 3016 /// DefineImplicitCopyConstructor - Checks for feasibility of 3017 /// defining this constructor as the copy constructor. 3018 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 3019 CXXConstructorDecl *Constructor); 3020 3021 /// \brief Declare the implicit move constructor for the given class. 3022 /// 3023 /// \param ClassDecl The Class declaration into which the implicit 3024 /// move constructor will be added. 3025 /// 3026 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 3027 /// declared. 3028 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 3029 3030 /// DefineImplicitMoveConstructor - Checks for feasibility of 3031 /// defining this constructor as the move constructor. 3032 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 3033 CXXConstructorDecl *Constructor); 3034 3035 /// \brief Declare the implicit copy assignment operator for the given class. 3036 /// 3037 /// \param ClassDecl The class declaration into which the implicit 3038 /// copy assignment operator will be added. 3039 /// 3040 /// \returns The implicitly-declared copy assignment operator. 3041 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 3042 3043 /// \brief Defines an implicitly-declared copy assignment operator. 3044 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 3045 CXXMethodDecl *MethodDecl); 3046 3047 /// \brief Declare the implicit move assignment operator for the given class. 3048 /// 3049 /// \param ClassDecl The Class declaration into which the implicit 3050 /// move assignment operator will be added. 3051 /// 3052 /// \returns The implicitly-declared move assignment operator, or NULL if it 3053 /// wasn't declared. 3054 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 3055 3056 /// \brief Defines an implicitly-declared move assignment operator. 3057 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 3058 CXXMethodDecl *MethodDecl); 3059 3060 /// \brief Force the declaration of any implicitly-declared members of this 3061 /// class. 3062 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 3063 3064 /// MaybeBindToTemporary - If the passed in expression has a record type with 3065 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 3066 /// it simply returns the passed in expression. 3067 ExprResult MaybeBindToTemporary(Expr *E); 3068 3069 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 3070 MultiExprArg ArgsPtr, 3071 SourceLocation Loc, 3072 ASTOwningVector<Expr*> &ConvertedArgs); 3073 3074 ParsedType getDestructorName(SourceLocation TildeLoc, 3075 IdentifierInfo &II, SourceLocation NameLoc, 3076 Scope *S, CXXScopeSpec &SS, 3077 ParsedType ObjectType, 3078 bool EnteringContext); 3079 3080 ParsedType getDestructorType(const DeclSpec& DS, ParsedType ObjectType); 3081 3082 // Checks that reinterpret casts don't have undefined behavior. 3083 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 3084 bool IsDereference, SourceRange Range); 3085 3086 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 3087 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 3088 tok::TokenKind Kind, 3089 SourceLocation LAngleBracketLoc, 3090 Declarator &D, 3091 SourceLocation RAngleBracketLoc, 3092 SourceLocation LParenLoc, 3093 Expr *E, 3094 SourceLocation RParenLoc); 3095 3096 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 3097 tok::TokenKind Kind, 3098 TypeSourceInfo *Ty, 3099 Expr *E, 3100 SourceRange AngleBrackets, 3101 SourceRange Parens); 3102 3103 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3104 SourceLocation TypeidLoc, 3105 TypeSourceInfo *Operand, 3106 SourceLocation RParenLoc); 3107 ExprResult BuildCXXTypeId(QualType TypeInfoType, 3108 SourceLocation TypeidLoc, 3109 Expr *Operand, 3110 SourceLocation RParenLoc); 3111 3112 /// ActOnCXXTypeid - Parse typeid( something ). 3113 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 3114 SourceLocation LParenLoc, bool isType, 3115 void *TyOrExpr, 3116 SourceLocation RParenLoc); 3117 3118 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3119 SourceLocation TypeidLoc, 3120 TypeSourceInfo *Operand, 3121 SourceLocation RParenLoc); 3122 ExprResult BuildCXXUuidof(QualType TypeInfoType, 3123 SourceLocation TypeidLoc, 3124 Expr *Operand, 3125 SourceLocation RParenLoc); 3126 3127 /// ActOnCXXUuidof - Parse __uuidof( something ). 3128 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 3129 SourceLocation LParenLoc, bool isType, 3130 void *TyOrExpr, 3131 SourceLocation RParenLoc); 3132 3133 3134 //// ActOnCXXThis - Parse 'this' pointer. 3135 ExprResult ActOnCXXThis(SourceLocation loc); 3136 3137 /// \brief Try to retrieve the type of the 'this' pointer. 3138 /// 3139 /// \param Capture If true, capture 'this' in this context. 3140 /// 3141 /// \returns The type of 'this', if possible. Otherwise, returns a NULL type. 3142 QualType getCurrentThisType(); 3143 3144 /// \brief Make sure the value of 'this' is actually available in the current 3145 /// context, if it is a potentially evaluated context. This check can be 3146 /// delayed in PotentiallyPotentiallyEvaluated contexts. 3147 void CheckCXXThisCapture(SourceLocation Loc); 3148 3149 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 3150 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 3151 3152 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 3153 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 3154 3155 //// ActOnCXXThrow - Parse throw expressions. 3156 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 3157 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 3158 bool IsThrownVarInScope); 3159 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 3160 bool IsThrownVarInScope); 3161 3162 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 3163 /// Can be interpreted either as function-style casting ("int(x)") 3164 /// or class type construction ("ClassType(x,y,z)") 3165 /// or creation of a value-initialized type ("int()"). 3166 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3167 SourceLocation LParenLoc, 3168 MultiExprArg Exprs, 3169 SourceLocation RParenLoc); 3170 3171 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3172 SourceLocation LParenLoc, 3173 MultiExprArg Exprs, 3174 SourceLocation RParenLoc); 3175 3176 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3177 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3178 SourceLocation PlacementLParen, 3179 MultiExprArg PlacementArgs, 3180 SourceLocation PlacementRParen, 3181 SourceRange TypeIdParens, Declarator &D, 3182 SourceLocation ConstructorLParen, 3183 MultiExprArg ConstructorArgs, 3184 SourceLocation ConstructorRParen); 3185 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3186 SourceLocation PlacementLParen, 3187 MultiExprArg PlacementArgs, 3188 SourceLocation PlacementRParen, 3189 SourceRange TypeIdParens, 3190 QualType AllocType, 3191 TypeSourceInfo *AllocTypeInfo, 3192 Expr *ArraySize, 3193 SourceLocation ConstructorLParen, 3194 MultiExprArg ConstructorArgs, 3195 SourceLocation ConstructorRParen, 3196 bool TypeMayContainAuto = true); 3197 3198 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3199 SourceRange R); 3200 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3201 bool UseGlobal, QualType AllocType, bool IsArray, 3202 Expr **PlaceArgs, unsigned NumPlaceArgs, 3203 FunctionDecl *&OperatorNew, 3204 FunctionDecl *&OperatorDelete); 3205 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3206 DeclarationName Name, Expr** Args, 3207 unsigned NumArgs, DeclContext *Ctx, 3208 bool AllowMissing, FunctionDecl *&Operator, 3209 bool Diagnose = true); 3210 void DeclareGlobalNewDelete(); 3211 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3212 QualType Argument, 3213 bool addMallocAttr = false); 3214 3215 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3216 DeclarationName Name, FunctionDecl* &Operator, 3217 bool Diagnose = true); 3218 3219 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3220 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3221 bool UseGlobal, bool ArrayForm, 3222 Expr *Operand); 3223 3224 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3225 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3226 SourceLocation StmtLoc, 3227 bool ConvertToBoolean); 3228 3229 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3230 Expr *Operand, SourceLocation RParen); 3231 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3232 SourceLocation RParen); 3233 3234 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3235 /// pseudo-functions. 3236 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3237 SourceLocation KWLoc, 3238 ParsedType Ty, 3239 SourceLocation RParen); 3240 3241 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3242 SourceLocation KWLoc, 3243 TypeSourceInfo *T, 3244 SourceLocation RParen); 3245 3246 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3247 /// pseudo-functions. 3248 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3249 SourceLocation KWLoc, 3250 ParsedType LhsTy, 3251 ParsedType RhsTy, 3252 SourceLocation RParen); 3253 3254 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3255 SourceLocation KWLoc, 3256 TypeSourceInfo *LhsT, 3257 TypeSourceInfo *RhsT, 3258 SourceLocation RParen); 3259 3260 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3261 /// pseudo-functions. 3262 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3263 SourceLocation KWLoc, 3264 ParsedType LhsTy, 3265 Expr *DimExpr, 3266 SourceLocation RParen); 3267 3268 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3269 SourceLocation KWLoc, 3270 TypeSourceInfo *TSInfo, 3271 Expr *DimExpr, 3272 SourceLocation RParen); 3273 3274 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3275 /// pseudo-functions. 3276 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3277 SourceLocation KWLoc, 3278 Expr *Queried, 3279 SourceLocation RParen); 3280 3281 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3282 SourceLocation KWLoc, 3283 Expr *Queried, 3284 SourceLocation RParen); 3285 3286 ExprResult ActOnStartCXXMemberReference(Scope *S, 3287 Expr *Base, 3288 SourceLocation OpLoc, 3289 tok::TokenKind OpKind, 3290 ParsedType &ObjectType, 3291 bool &MayBePseudoDestructor); 3292 3293 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3294 3295 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3296 SourceLocation OpLoc, 3297 tok::TokenKind OpKind, 3298 const CXXScopeSpec &SS, 3299 TypeSourceInfo *ScopeType, 3300 SourceLocation CCLoc, 3301 SourceLocation TildeLoc, 3302 PseudoDestructorTypeStorage DestroyedType, 3303 bool HasTrailingLParen); 3304 3305 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3306 SourceLocation OpLoc, 3307 tok::TokenKind OpKind, 3308 CXXScopeSpec &SS, 3309 UnqualifiedId &FirstTypeName, 3310 SourceLocation CCLoc, 3311 SourceLocation TildeLoc, 3312 UnqualifiedId &SecondTypeName, 3313 bool HasTrailingLParen); 3314 3315 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3316 SourceLocation OpLoc, 3317 tok::TokenKind OpKind, 3318 SourceLocation TildeLoc, 3319 const DeclSpec& DS, 3320 bool HasTrailingLParen); 3321 3322 /// MaybeCreateExprWithCleanups - If the current full-expression 3323 /// requires any cleanups, surround it with a ExprWithCleanups node. 3324 /// Otherwise, just returns the passed-in expression. 3325 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3326 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3327 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3328 3329 ExprResult ActOnFinishFullExpr(Expr *Expr); 3330 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3331 3332 // Marks SS invalid if it represents an incomplete type. 3333 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3334 3335 DeclContext *computeDeclContext(QualType T); 3336 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3337 bool EnteringContext = false); 3338 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3339 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3340 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3341 3342 /// \brief The parser has parsed a global nested-name-specifier '::'. 3343 /// 3344 /// \param S The scope in which this nested-name-specifier occurs. 3345 /// 3346 /// \param CCLoc The location of the '::'. 3347 /// 3348 /// \param SS The nested-name-specifier, which will be updated in-place 3349 /// to reflect the parsed nested-name-specifier. 3350 /// 3351 /// \returns true if an error occurred, false otherwise. 3352 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3353 CXXScopeSpec &SS); 3354 3355 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3356 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3357 3358 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3359 SourceLocation IdLoc, 3360 IdentifierInfo &II, 3361 ParsedType ObjectType); 3362 3363 bool BuildCXXNestedNameSpecifier(Scope *S, 3364 IdentifierInfo &Identifier, 3365 SourceLocation IdentifierLoc, 3366 SourceLocation CCLoc, 3367 QualType ObjectType, 3368 bool EnteringContext, 3369 CXXScopeSpec &SS, 3370 NamedDecl *ScopeLookupResult, 3371 bool ErrorRecoveryLookup); 3372 3373 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3374 /// 3375 /// \param S The scope in which this nested-name-specifier occurs. 3376 /// 3377 /// \param Identifier The identifier preceding the '::'. 3378 /// 3379 /// \param IdentifierLoc The location of the identifier. 3380 /// 3381 /// \param CCLoc The location of the '::'. 3382 /// 3383 /// \param ObjectType The type of the object, if we're parsing 3384 /// nested-name-specifier in a member access expression. 3385 /// 3386 /// \param EnteringContext Whether we're entering the context nominated by 3387 /// this nested-name-specifier. 3388 /// 3389 /// \param SS The nested-name-specifier, which is both an input 3390 /// parameter (the nested-name-specifier before this type) and an 3391 /// output parameter (containing the full nested-name-specifier, 3392 /// including this new type). 3393 /// 3394 /// \returns true if an error occurred, false otherwise. 3395 bool ActOnCXXNestedNameSpecifier(Scope *S, 3396 IdentifierInfo &Identifier, 3397 SourceLocation IdentifierLoc, 3398 SourceLocation CCLoc, 3399 ParsedType ObjectType, 3400 bool EnteringContext, 3401 CXXScopeSpec &SS); 3402 3403 bool ActOnCXXNestedNameSpecifierDecltype(CXXScopeSpec &SS, 3404 const DeclSpec &DS, 3405 SourceLocation ColonColonLoc); 3406 3407 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3408 IdentifierInfo &Identifier, 3409 SourceLocation IdentifierLoc, 3410 SourceLocation ColonLoc, 3411 ParsedType ObjectType, 3412 bool EnteringContext); 3413 3414 /// \brief The parser has parsed a nested-name-specifier 3415 /// 'template[opt] template-name < template-args >::'. 3416 /// 3417 /// \param S The scope in which this nested-name-specifier occurs. 3418 /// 3419 /// \param TemplateLoc The location of the 'template' keyword, if any. 3420 /// 3421 /// \param SS The nested-name-specifier, which is both an input 3422 /// parameter (the nested-name-specifier before this type) and an 3423 /// output parameter (containing the full nested-name-specifier, 3424 /// including this new type). 3425 /// 3426 /// \param TemplateLoc the location of the 'template' keyword, if any. 3427 /// \param TemplateName The template name. 3428 /// \param TemplateNameLoc The location of the template name. 3429 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3430 /// \param TemplateArgs The template arguments. 3431 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3432 /// \param CCLoc The location of the '::'. 3433 3434 /// \param EnteringContext Whether we're entering the context of the 3435 /// nested-name-specifier. 3436 /// 3437 /// 3438 /// \returns true if an error occurred, false otherwise. 3439 bool ActOnCXXNestedNameSpecifier(Scope *S, 3440 SourceLocation TemplateLoc, 3441 CXXScopeSpec &SS, 3442 TemplateTy Template, 3443 SourceLocation TemplateNameLoc, 3444 SourceLocation LAngleLoc, 3445 ASTTemplateArgsPtr TemplateArgs, 3446 SourceLocation RAngleLoc, 3447 SourceLocation CCLoc, 3448 bool EnteringContext); 3449 3450 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3451 /// that the parser can use later to reconstruct the given 3452 /// nested-name-specifier. 3453 /// 3454 /// \param SS A nested-name-specifier. 3455 /// 3456 /// \returns A pointer containing all of the information in the 3457 /// nested-name-specifier \p SS. 3458 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3459 3460 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3461 /// the nested-name-specifier structure. 3462 /// 3463 /// \param Annotation The annotation pointer, produced by 3464 /// \c SaveNestedNameSpecifierAnnotation(). 3465 /// 3466 /// \param AnnotationRange The source range corresponding to the annotation. 3467 /// 3468 /// \param SS The nested-name-specifier that will be updated with the contents 3469 /// of the annotation pointer. 3470 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3471 SourceRange AnnotationRange, 3472 CXXScopeSpec &SS); 3473 3474 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3475 3476 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3477 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3478 /// After this method is called, according to [C++ 3.4.3p3], names should be 3479 /// looked up in the declarator-id's scope, until the declarator is parsed and 3480 /// ActOnCXXExitDeclaratorScope is called. 3481 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3482 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3483 3484 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3485 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3486 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3487 /// Used to indicate that names should revert to being looked up in the 3488 /// defining scope. 3489 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3490 3491 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3492 /// initializer for the declaration 'Dcl'. 3493 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3494 /// static data member of class X, names should be looked up in the scope of 3495 /// class X. 3496 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3497 3498 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3499 /// initializer for the declaration 'Dcl'. 3500 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3501 3502 /// ActOnStartOfLambdaDefinition - This is called just before we start 3503 /// parsing the body of a lambda; it analyzes the explicit captures and 3504 /// arguments, and sets up various data-structures for the body of the 3505 /// lambda. 3506 void ActOnStartOfLambdaDefinition(LambdaIntroducer &Intro, 3507 Declarator &ParamInfo, Scope *CurScope); 3508 3509 /// ActOnLambdaError - If there is an error parsing a lambda, this callback 3510 /// is invoked to pop the information about the lambda. 3511 void ActOnLambdaError(SourceLocation StartLoc, Scope *CurScope); 3512 3513 /// ActOnLambdaExpr - This is called when the body of a lambda expression 3514 /// was successfully completed. 3515 ExprResult ActOnLambdaExpr(SourceLocation StartLoc, Stmt *Body, 3516 Scope *CurScope); 3517 3518 // ParseObjCStringLiteral - Parse Objective-C string literals. 3519 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3520 Expr **Strings, 3521 unsigned NumStrings); 3522 3523 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3524 TypeSourceInfo *EncodedTypeInfo, 3525 SourceLocation RParenLoc); 3526 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3527 CXXMethodDecl *Method, 3528 bool HadMultipleCandidates); 3529 3530 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3531 SourceLocation EncodeLoc, 3532 SourceLocation LParenLoc, 3533 ParsedType Ty, 3534 SourceLocation RParenLoc); 3535 3536 // ParseObjCSelectorExpression - Build selector expression for @selector 3537 ExprResult ParseObjCSelectorExpression(Selector Sel, 3538 SourceLocation AtLoc, 3539 SourceLocation SelLoc, 3540 SourceLocation LParenLoc, 3541 SourceLocation RParenLoc); 3542 3543 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3544 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3545 SourceLocation AtLoc, 3546 SourceLocation ProtoLoc, 3547 SourceLocation LParenLoc, 3548 SourceLocation RParenLoc); 3549 3550 //===--------------------------------------------------------------------===// 3551 // C++ Declarations 3552 // 3553 Decl *ActOnStartLinkageSpecification(Scope *S, 3554 SourceLocation ExternLoc, 3555 SourceLocation LangLoc, 3556 StringRef Lang, 3557 SourceLocation LBraceLoc); 3558 Decl *ActOnFinishLinkageSpecification(Scope *S, 3559 Decl *LinkageSpec, 3560 SourceLocation RBraceLoc); 3561 3562 3563 //===--------------------------------------------------------------------===// 3564 // C++ Classes 3565 // 3566 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3567 const CXXScopeSpec *SS = 0); 3568 3569 bool ActOnAccessSpecifier(AccessSpecifier Access, 3570 SourceLocation ASLoc, 3571 SourceLocation ColonLoc, 3572 AttributeList *Attrs = 0); 3573 3574 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3575 Declarator &D, 3576 MultiTemplateParamsArg TemplateParameterLists, 3577 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3578 bool HasDeferredInit); 3579 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3580 Expr *Init); 3581 3582 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3583 Scope *S, 3584 CXXScopeSpec &SS, 3585 IdentifierInfo *MemberOrBase, 3586 ParsedType TemplateTypeTy, 3587 SourceLocation IdLoc, 3588 SourceLocation LParenLoc, 3589 Expr **Args, unsigned NumArgs, 3590 SourceLocation RParenLoc, 3591 SourceLocation EllipsisLoc); 3592 3593 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3594 Scope *S, 3595 CXXScopeSpec &SS, 3596 IdentifierInfo *MemberOrBase, 3597 ParsedType TemplateTypeTy, 3598 SourceLocation IdLoc, 3599 Expr *InitList, 3600 SourceLocation EllipsisLoc); 3601 3602 MemInitResult BuildMemInitializer(Decl *ConstructorD, 3603 Scope *S, 3604 CXXScopeSpec &SS, 3605 IdentifierInfo *MemberOrBase, 3606 ParsedType TemplateTypeTy, 3607 SourceLocation IdLoc, 3608 const MultiInitializer &Init, 3609 SourceLocation EllipsisLoc); 3610 3611 MemInitResult BuildMemberInitializer(ValueDecl *Member, 3612 const MultiInitializer &Args, 3613 SourceLocation IdLoc); 3614 3615 MemInitResult BuildBaseInitializer(QualType BaseType, 3616 TypeSourceInfo *BaseTInfo, 3617 const MultiInitializer &Args, 3618 CXXRecordDecl *ClassDecl, 3619 SourceLocation EllipsisLoc); 3620 3621 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3622 const MultiInitializer &Args, 3623 CXXRecordDecl *ClassDecl); 3624 3625 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3626 CXXCtorInitializer *Initializer); 3627 3628 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3629 CXXCtorInitializer **Initializers, 3630 unsigned NumInitializers, bool AnyErrors); 3631 3632 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3633 3634 3635 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3636 /// mark all the non-trivial destructors of its members and bases as 3637 /// referenced. 3638 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3639 CXXRecordDecl *Record); 3640 3641 /// \brief The list of classes whose vtables have been used within 3642 /// this translation unit, and the source locations at which the 3643 /// first use occurred. 3644 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3645 3646 /// \brief The list of vtables that are required but have not yet been 3647 /// materialized. 3648 SmallVector<VTableUse, 16> VTableUses; 3649 3650 /// \brief The set of classes whose vtables have been used within 3651 /// this translation unit, and a bit that will be true if the vtable is 3652 /// required to be emitted (otherwise, it should be emitted only if needed 3653 /// by code generation). 3654 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3655 3656 /// \brief Load any externally-stored vtable uses. 3657 void LoadExternalVTableUses(); 3658 3659 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3660 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3661 DynamicClassesType; 3662 3663 /// \brief A list of all of the dynamic classes in this translation 3664 /// unit. 3665 DynamicClassesType DynamicClasses; 3666 3667 /// \brief Note that the vtable for the given class was used at the 3668 /// given location. 3669 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3670 bool DefinitionRequired = false); 3671 3672 /// MarkVirtualMembersReferenced - Will mark all members of the given 3673 /// CXXRecordDecl referenced. 3674 void MarkVirtualMembersReferenced(SourceLocation Loc, 3675 const CXXRecordDecl *RD); 3676 3677 /// \brief Define all of the vtables that have been used in this 3678 /// translation unit and reference any virtual members used by those 3679 /// vtables. 3680 /// 3681 /// \returns true if any work was done, false otherwise. 3682 bool DefineUsedVTables(); 3683 3684 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3685 3686 void ActOnMemInitializers(Decl *ConstructorDecl, 3687 SourceLocation ColonLoc, 3688 CXXCtorInitializer **MemInits, 3689 unsigned NumMemInits, 3690 bool AnyErrors); 3691 3692 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3693 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3694 Decl *TagDecl, 3695 SourceLocation LBrac, 3696 SourceLocation RBrac, 3697 AttributeList *AttrList); 3698 3699 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3700 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3701 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3702 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3703 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3704 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3705 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3706 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3707 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3708 bool IsInsideALocalClassWithinATemplateFunction(); 3709 3710 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3711 Expr *AssertExpr, 3712 Expr *AssertMessageExpr, 3713 SourceLocation RParenLoc); 3714 3715 FriendDecl *CheckFriendTypeDecl(SourceLocation Loc, 3716 SourceLocation FriendLoc, 3717 TypeSourceInfo *TSInfo); 3718 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3719 MultiTemplateParamsArg TemplateParams); 3720 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, 3721 MultiTemplateParamsArg TemplateParams); 3722 3723 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3724 StorageClass& SC); 3725 void CheckConstructor(CXXConstructorDecl *Constructor); 3726 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3727 StorageClass& SC); 3728 bool CheckDestructor(CXXDestructorDecl *Destructor); 3729 void CheckConversionDeclarator(Declarator &D, QualType &R, 3730 StorageClass& SC); 3731 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3732 3733 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3734 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3735 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3736 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3737 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3738 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3739 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3740 3741 //===--------------------------------------------------------------------===// 3742 // C++ Derived Classes 3743 // 3744 3745 /// ActOnBaseSpecifier - Parsed a base specifier 3746 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3747 SourceRange SpecifierRange, 3748 bool Virtual, AccessSpecifier Access, 3749 TypeSourceInfo *TInfo, 3750 SourceLocation EllipsisLoc); 3751 3752 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3753 SourceRange SpecifierRange, 3754 bool Virtual, AccessSpecifier Access, 3755 ParsedType basetype, 3756 SourceLocation BaseLoc, 3757 SourceLocation EllipsisLoc); 3758 3759 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3760 unsigned NumBases); 3761 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3762 unsigned NumBases); 3763 3764 bool IsDerivedFrom(QualType Derived, QualType Base); 3765 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3766 3767 // FIXME: I don't like this name. 3768 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3769 3770 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3771 3772 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3773 SourceLocation Loc, SourceRange Range, 3774 CXXCastPath *BasePath = 0, 3775 bool IgnoreAccess = false); 3776 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3777 unsigned InaccessibleBaseID, 3778 unsigned AmbigiousBaseConvID, 3779 SourceLocation Loc, SourceRange Range, 3780 DeclarationName Name, 3781 CXXCastPath *BasePath); 3782 3783 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3784 3785 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3786 /// covariant, according to C++ [class.virtual]p5. 3787 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3788 const CXXMethodDecl *Old); 3789 3790 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3791 /// spec is a subset of base spec. 3792 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3793 const CXXMethodDecl *Old); 3794 3795 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3796 3797 /// CheckOverrideControl - Check C++0x override control semantics. 3798 void CheckOverrideControl(const Decl *D); 3799 3800 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3801 /// overrides a virtual member function marked 'final', according to 3802 /// C++0x [class.virtual]p3. 3803 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3804 const CXXMethodDecl *Old); 3805 3806 3807 //===--------------------------------------------------------------------===// 3808 // C++ Access Control 3809 // 3810 3811 enum AccessResult { 3812 AR_accessible, 3813 AR_inaccessible, 3814 AR_dependent, 3815 AR_delayed 3816 }; 3817 3818 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3819 NamedDecl *PrevMemberDecl, 3820 AccessSpecifier LexicalAS); 3821 3822 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3823 DeclAccessPair FoundDecl); 3824 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3825 DeclAccessPair FoundDecl); 3826 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3827 SourceRange PlacementRange, 3828 CXXRecordDecl *NamingClass, 3829 DeclAccessPair FoundDecl, 3830 bool Diagnose = true); 3831 AccessResult CheckConstructorAccess(SourceLocation Loc, 3832 CXXConstructorDecl *D, 3833 const InitializedEntity &Entity, 3834 AccessSpecifier Access, 3835 bool IsCopyBindingRefToTemp = false); 3836 AccessResult CheckConstructorAccess(SourceLocation Loc, 3837 CXXConstructorDecl *D, 3838 AccessSpecifier Access, 3839 PartialDiagnostic PD); 3840 AccessResult CheckDestructorAccess(SourceLocation Loc, 3841 CXXDestructorDecl *Dtor, 3842 const PartialDiagnostic &PDiag); 3843 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3844 NamedDecl *D, 3845 const PartialDiagnostic &PDiag); 3846 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3847 Expr *ObjectExpr, 3848 Expr *ArgExpr, 3849 DeclAccessPair FoundDecl); 3850 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3851 DeclAccessPair FoundDecl); 3852 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3853 QualType Base, QualType Derived, 3854 const CXXBasePath &Path, 3855 unsigned DiagID, 3856 bool ForceCheck = false, 3857 bool ForceUnprivileged = false); 3858 void CheckLookupAccess(const LookupResult &R); 3859 bool IsSimplyAccessible(NamedDecl *decl, DeclContext *Ctx); 3860 3861 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3862 const MultiLevelTemplateArgumentList &TemplateArgs); 3863 void PerformDependentDiagnostics(const DeclContext *Pattern, 3864 const MultiLevelTemplateArgumentList &TemplateArgs); 3865 3866 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3867 3868 /// A flag to suppress access checking. 3869 bool SuppressAccessChecking; 3870 3871 /// \brief When true, access checking violations are treated as SFINAE 3872 /// failures rather than hard errors. 3873 bool AccessCheckingSFINAE; 3874 3875 void ActOnStartSuppressingAccessChecks(); 3876 void ActOnStopSuppressingAccessChecks(); 3877 3878 enum AbstractDiagSelID { 3879 AbstractNone = -1, 3880 AbstractReturnType, 3881 AbstractParamType, 3882 AbstractVariableType, 3883 AbstractFieldType, 3884 AbstractArrayType 3885 }; 3886 3887 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3888 const PartialDiagnostic &PD); 3889 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3890 3891 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3892 AbstractDiagSelID SelID = AbstractNone); 3893 3894 //===--------------------------------------------------------------------===// 3895 // C++ Overloaded Operators [C++ 13.5] 3896 // 3897 3898 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3899 3900 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3901 3902 //===--------------------------------------------------------------------===// 3903 // C++ Templates [C++ 14] 3904 // 3905 void FilterAcceptableTemplateNames(LookupResult &R); 3906 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3907 3908 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3909 QualType ObjectType, bool EnteringContext, 3910 bool &MemberOfUnknownSpecialization); 3911 3912 TemplateNameKind isTemplateName(Scope *S, 3913 CXXScopeSpec &SS, 3914 bool hasTemplateKeyword, 3915 UnqualifiedId &Name, 3916 ParsedType ObjectType, 3917 bool EnteringContext, 3918 TemplateTy &Template, 3919 bool &MemberOfUnknownSpecialization); 3920 3921 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3922 SourceLocation IILoc, 3923 Scope *S, 3924 const CXXScopeSpec *SS, 3925 TemplateTy &SuggestedTemplate, 3926 TemplateNameKind &SuggestedKind); 3927 3928 void DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3929 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3930 3931 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3932 SourceLocation EllipsisLoc, 3933 SourceLocation KeyLoc, 3934 IdentifierInfo *ParamName, 3935 SourceLocation ParamNameLoc, 3936 unsigned Depth, unsigned Position, 3937 SourceLocation EqualLoc, 3938 ParsedType DefaultArg); 3939 3940 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3941 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3942 unsigned Depth, 3943 unsigned Position, 3944 SourceLocation EqualLoc, 3945 Expr *DefaultArg); 3946 Decl *ActOnTemplateTemplateParameter(Scope *S, 3947 SourceLocation TmpLoc, 3948 TemplateParameterList *Params, 3949 SourceLocation EllipsisLoc, 3950 IdentifierInfo *ParamName, 3951 SourceLocation ParamNameLoc, 3952 unsigned Depth, 3953 unsigned Position, 3954 SourceLocation EqualLoc, 3955 ParsedTemplateArgument DefaultArg); 3956 3957 TemplateParameterList * 3958 ActOnTemplateParameterList(unsigned Depth, 3959 SourceLocation ExportLoc, 3960 SourceLocation TemplateLoc, 3961 SourceLocation LAngleLoc, 3962 Decl **Params, unsigned NumParams, 3963 SourceLocation RAngleLoc); 3964 3965 /// \brief The context in which we are checking a template parameter 3966 /// list. 3967 enum TemplateParamListContext { 3968 TPC_ClassTemplate, 3969 TPC_FunctionTemplate, 3970 TPC_ClassTemplateMember, 3971 TPC_FriendFunctionTemplate, 3972 TPC_FriendFunctionTemplateDefinition, 3973 TPC_TypeAliasTemplate 3974 }; 3975 3976 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3977 TemplateParameterList *OldParams, 3978 TemplateParamListContext TPC); 3979 TemplateParameterList * 3980 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3981 SourceLocation DeclLoc, 3982 const CXXScopeSpec &SS, 3983 TemplateParameterList **ParamLists, 3984 unsigned NumParamLists, 3985 bool IsFriend, 3986 bool &IsExplicitSpecialization, 3987 bool &Invalid); 3988 3989 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3990 SourceLocation KWLoc, CXXScopeSpec &SS, 3991 IdentifierInfo *Name, SourceLocation NameLoc, 3992 AttributeList *Attr, 3993 TemplateParameterList *TemplateParams, 3994 AccessSpecifier AS, 3995 SourceLocation ModulePrivateLoc, 3996 unsigned NumOuterTemplateParamLists, 3997 TemplateParameterList **OuterTemplateParamLists); 3998 3999 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 4000 TemplateArgumentListInfo &Out); 4001 4002 void NoteAllFoundTemplates(TemplateName Name); 4003 4004 QualType CheckTemplateIdType(TemplateName Template, 4005 SourceLocation TemplateLoc, 4006 TemplateArgumentListInfo &TemplateArgs); 4007 4008 TypeResult 4009 ActOnTemplateIdType(CXXScopeSpec &SS, 4010 TemplateTy Template, SourceLocation TemplateLoc, 4011 SourceLocation LAngleLoc, 4012 ASTTemplateArgsPtr TemplateArgs, 4013 SourceLocation RAngleLoc); 4014 4015 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 4016 /// such as \c class T::template apply<U>. 4017 /// 4018 /// \param TUK 4019 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 4020 TypeSpecifierType TagSpec, 4021 SourceLocation TagLoc, 4022 CXXScopeSpec &SS, 4023 TemplateTy TemplateD, 4024 SourceLocation TemplateLoc, 4025 SourceLocation LAngleLoc, 4026 ASTTemplateArgsPtr TemplateArgsIn, 4027 SourceLocation RAngleLoc); 4028 4029 4030 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 4031 LookupResult &R, 4032 bool RequiresADL, 4033 const TemplateArgumentListInfo &TemplateArgs); 4034 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 4035 const DeclarationNameInfo &NameInfo, 4036 const TemplateArgumentListInfo &TemplateArgs); 4037 4038 TemplateNameKind ActOnDependentTemplateName(Scope *S, 4039 SourceLocation TemplateKWLoc, 4040 CXXScopeSpec &SS, 4041 UnqualifiedId &Name, 4042 ParsedType ObjectType, 4043 bool EnteringContext, 4044 TemplateTy &Template); 4045 4046 DeclResult 4047 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 4048 SourceLocation KWLoc, 4049 SourceLocation ModulePrivateLoc, 4050 CXXScopeSpec &SS, 4051 TemplateTy Template, 4052 SourceLocation TemplateNameLoc, 4053 SourceLocation LAngleLoc, 4054 ASTTemplateArgsPtr TemplateArgs, 4055 SourceLocation RAngleLoc, 4056 AttributeList *Attr, 4057 MultiTemplateParamsArg TemplateParameterLists); 4058 4059 Decl *ActOnTemplateDeclarator(Scope *S, 4060 MultiTemplateParamsArg TemplateParameterLists, 4061 Declarator &D); 4062 4063 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 4064 MultiTemplateParamsArg TemplateParameterLists, 4065 Declarator &D); 4066 4067 bool 4068 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 4069 TemplateSpecializationKind NewTSK, 4070 NamedDecl *PrevDecl, 4071 TemplateSpecializationKind PrevTSK, 4072 SourceLocation PrevPtOfInstantiation, 4073 bool &SuppressNew); 4074 4075 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 4076 const TemplateArgumentListInfo &ExplicitTemplateArgs, 4077 LookupResult &Previous); 4078 4079 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 4080 TemplateArgumentListInfo *ExplicitTemplateArgs, 4081 LookupResult &Previous); 4082 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 4083 4084 DeclResult 4085 ActOnExplicitInstantiation(Scope *S, 4086 SourceLocation ExternLoc, 4087 SourceLocation TemplateLoc, 4088 unsigned TagSpec, 4089 SourceLocation KWLoc, 4090 const CXXScopeSpec &SS, 4091 TemplateTy Template, 4092 SourceLocation TemplateNameLoc, 4093 SourceLocation LAngleLoc, 4094 ASTTemplateArgsPtr TemplateArgs, 4095 SourceLocation RAngleLoc, 4096 AttributeList *Attr); 4097 4098 DeclResult 4099 ActOnExplicitInstantiation(Scope *S, 4100 SourceLocation ExternLoc, 4101 SourceLocation TemplateLoc, 4102 unsigned TagSpec, 4103 SourceLocation KWLoc, 4104 CXXScopeSpec &SS, 4105 IdentifierInfo *Name, 4106 SourceLocation NameLoc, 4107 AttributeList *Attr); 4108 4109 DeclResult ActOnExplicitInstantiation(Scope *S, 4110 SourceLocation ExternLoc, 4111 SourceLocation TemplateLoc, 4112 Declarator &D); 4113 4114 TemplateArgumentLoc 4115 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 4116 SourceLocation TemplateLoc, 4117 SourceLocation RAngleLoc, 4118 Decl *Param, 4119 SmallVectorImpl<TemplateArgument> &Converted); 4120 4121 /// \brief Specifies the context in which a particular template 4122 /// argument is being checked. 4123 enum CheckTemplateArgumentKind { 4124 /// \brief The template argument was specified in the code or was 4125 /// instantiated with some deduced template arguments. 4126 CTAK_Specified, 4127 4128 /// \brief The template argument was deduced via template argument 4129 /// deduction. 4130 CTAK_Deduced, 4131 4132 /// \brief The template argument was deduced from an array bound 4133 /// via template argument deduction. 4134 CTAK_DeducedFromArrayBound 4135 }; 4136 4137 bool CheckTemplateArgument(NamedDecl *Param, 4138 const TemplateArgumentLoc &Arg, 4139 NamedDecl *Template, 4140 SourceLocation TemplateLoc, 4141 SourceLocation RAngleLoc, 4142 unsigned ArgumentPackIndex, 4143 SmallVectorImpl<TemplateArgument> &Converted, 4144 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4145 4146 /// \brief Check that the given template arguments can be be provided to 4147 /// the given template, converting the arguments along the way. 4148 /// 4149 /// \param Template The template to which the template arguments are being 4150 /// provided. 4151 /// 4152 /// \param TemplateLoc The location of the template name in the source. 4153 /// 4154 /// \param TemplateArgs The list of template arguments. If the template is 4155 /// a template template parameter, this function may extend the set of 4156 /// template arguments to also include substituted, defaulted template 4157 /// arguments. 4158 /// 4159 /// \param PartialTemplateArgs True if the list of template arguments is 4160 /// intentionally partial, e.g., because we're checking just the initial 4161 /// set of template arguments. 4162 /// 4163 /// \param Converted Will receive the converted, canonicalized template 4164 /// arguments. 4165 /// 4166 /// \returns True if an error occurred, false otherwise. 4167 bool CheckTemplateArgumentList(TemplateDecl *Template, 4168 SourceLocation TemplateLoc, 4169 TemplateArgumentListInfo &TemplateArgs, 4170 bool PartialTemplateArgs, 4171 SmallVectorImpl<TemplateArgument> &Converted); 4172 4173 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 4174 const TemplateArgumentLoc &Arg, 4175 SmallVectorImpl<TemplateArgument> &Converted); 4176 4177 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 4178 TypeSourceInfo *Arg); 4179 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 4180 TemplateArgument &Converted); 4181 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 4182 QualType InstantiatedParamType, Expr *Arg, 4183 TemplateArgument &Converted, 4184 CheckTemplateArgumentKind CTAK = CTAK_Specified); 4185 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 4186 const TemplateArgumentLoc &Arg); 4187 4188 ExprResult 4189 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 4190 QualType ParamType, 4191 SourceLocation Loc); 4192 ExprResult 4193 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 4194 SourceLocation Loc); 4195 4196 /// \brief Enumeration describing how template parameter lists are compared 4197 /// for equality. 4198 enum TemplateParameterListEqualKind { 4199 /// \brief We are matching the template parameter lists of two templates 4200 /// that might be redeclarations. 4201 /// 4202 /// \code 4203 /// template<typename T> struct X; 4204 /// template<typename T> struct X; 4205 /// \endcode 4206 TPL_TemplateMatch, 4207 4208 /// \brief We are matching the template parameter lists of two template 4209 /// template parameters as part of matching the template parameter lists 4210 /// of two templates that might be redeclarations. 4211 /// 4212 /// \code 4213 /// template<template<int I> class TT> struct X; 4214 /// template<template<int Value> class Other> struct X; 4215 /// \endcode 4216 TPL_TemplateTemplateParmMatch, 4217 4218 /// \brief We are matching the template parameter lists of a template 4219 /// template argument against the template parameter lists of a template 4220 /// template parameter. 4221 /// 4222 /// \code 4223 /// template<template<int Value> class Metafun> struct X; 4224 /// template<int Value> struct integer_c; 4225 /// X<integer_c> xic; 4226 /// \endcode 4227 TPL_TemplateTemplateArgumentMatch 4228 }; 4229 4230 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4231 TemplateParameterList *Old, 4232 bool Complain, 4233 TemplateParameterListEqualKind Kind, 4234 SourceLocation TemplateArgLoc 4235 = SourceLocation()); 4236 4237 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4238 4239 /// \brief Called when the parser has parsed a C++ typename 4240 /// specifier, e.g., "typename T::type". 4241 /// 4242 /// \param S The scope in which this typename type occurs. 4243 /// \param TypenameLoc the location of the 'typename' keyword 4244 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4245 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4246 /// \param IdLoc the location of the identifier. 4247 TypeResult 4248 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4249 const CXXScopeSpec &SS, const IdentifierInfo &II, 4250 SourceLocation IdLoc); 4251 4252 /// \brief Called when the parser has parsed a C++ typename 4253 /// specifier that ends in a template-id, e.g., 4254 /// "typename MetaFun::template apply<T1, T2>". 4255 /// 4256 /// \param S The scope in which this typename type occurs. 4257 /// \param TypenameLoc the location of the 'typename' keyword 4258 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4259 /// \param TemplateLoc the location of the 'template' keyword, if any. 4260 /// \param TemplateName The template name. 4261 /// \param TemplateNameLoc The location of the template name. 4262 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4263 /// \param TemplateArgs The template arguments. 4264 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4265 TypeResult 4266 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4267 const CXXScopeSpec &SS, 4268 SourceLocation TemplateLoc, 4269 TemplateTy Template, 4270 SourceLocation TemplateNameLoc, 4271 SourceLocation LAngleLoc, 4272 ASTTemplateArgsPtr TemplateArgs, 4273 SourceLocation RAngleLoc); 4274 4275 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4276 SourceLocation KeywordLoc, 4277 NestedNameSpecifierLoc QualifierLoc, 4278 const IdentifierInfo &II, 4279 SourceLocation IILoc); 4280 4281 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4282 SourceLocation Loc, 4283 DeclarationName Name); 4284 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4285 4286 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4287 bool RebuildTemplateParamsInCurrentInstantiation( 4288 TemplateParameterList *Params); 4289 4290 std::string 4291 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4292 const TemplateArgumentList &Args); 4293 4294 std::string 4295 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4296 const TemplateArgument *Args, 4297 unsigned NumArgs); 4298 4299 //===--------------------------------------------------------------------===// 4300 // C++ Variadic Templates (C++0x [temp.variadic]) 4301 //===--------------------------------------------------------------------===// 4302 4303 /// \brief The context in which an unexpanded parameter pack is 4304 /// being diagnosed. 4305 /// 4306 /// Note that the values of this enumeration line up with the first 4307 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4308 enum UnexpandedParameterPackContext { 4309 /// \brief An arbitrary expression. 4310 UPPC_Expression = 0, 4311 4312 /// \brief The base type of a class type. 4313 UPPC_BaseType, 4314 4315 /// \brief The type of an arbitrary declaration. 4316 UPPC_DeclarationType, 4317 4318 /// \brief The type of a data member. 4319 UPPC_DataMemberType, 4320 4321 /// \brief The size of a bit-field. 4322 UPPC_BitFieldWidth, 4323 4324 /// \brief The expression in a static assertion. 4325 UPPC_StaticAssertExpression, 4326 4327 /// \brief The fixed underlying type of an enumeration. 4328 UPPC_FixedUnderlyingType, 4329 4330 /// \brief The enumerator value. 4331 UPPC_EnumeratorValue, 4332 4333 /// \brief A using declaration. 4334 UPPC_UsingDeclaration, 4335 4336 /// \brief A friend declaration. 4337 UPPC_FriendDeclaration, 4338 4339 /// \brief A declaration qualifier. 4340 UPPC_DeclarationQualifier, 4341 4342 /// \brief An initializer. 4343 UPPC_Initializer, 4344 4345 /// \brief A default argument. 4346 UPPC_DefaultArgument, 4347 4348 /// \brief The type of a non-type template parameter. 4349 UPPC_NonTypeTemplateParameterType, 4350 4351 /// \brief The type of an exception. 4352 UPPC_ExceptionType, 4353 4354 /// \brief Partial specialization. 4355 UPPC_PartialSpecialization, 4356 4357 /// \brief Microsoft __if_exists. 4358 UPPC_IfExists, 4359 4360 /// \brief Microsoft __if_not_exists. 4361 UPPC_IfNotExists 4362}; 4363 4364 /// \brief Diagnose unexpanded parameter packs. 4365 /// 4366 /// \param Loc The location at which we should emit the diagnostic. 4367 /// 4368 /// \param UPPC The context in which we are diagnosing unexpanded 4369 /// parameter packs. 4370 /// 4371 /// \param Unexpanded the set of unexpanded parameter packs. 4372 void DiagnoseUnexpandedParameterPacks(SourceLocation Loc, 4373 UnexpandedParameterPackContext UPPC, 4374 const SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4375 4376 /// \brief If the given type contains an unexpanded parameter pack, 4377 /// diagnose the error. 4378 /// 4379 /// \param Loc The source location where a diagnostc should be emitted. 4380 /// 4381 /// \param T The type that is being checked for unexpanded parameter 4382 /// packs. 4383 /// 4384 /// \returns true if an error occurred, false otherwise. 4385 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4386 UnexpandedParameterPackContext UPPC); 4387 4388 /// \brief If the given expression contains an unexpanded parameter 4389 /// pack, diagnose the error. 4390 /// 4391 /// \param E The expression that is being checked for unexpanded 4392 /// parameter packs. 4393 /// 4394 /// \returns true if an error occurred, false otherwise. 4395 bool DiagnoseUnexpandedParameterPack(Expr *E, 4396 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4397 4398 /// \brief If the given nested-name-specifier contains an unexpanded 4399 /// parameter pack, diagnose the error. 4400 /// 4401 /// \param SS The nested-name-specifier that is being checked for 4402 /// unexpanded parameter packs. 4403 /// 4404 /// \returns true if an error occurred, false otherwise. 4405 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4406 UnexpandedParameterPackContext UPPC); 4407 4408 /// \brief If the given name contains an unexpanded parameter pack, 4409 /// diagnose the error. 4410 /// 4411 /// \param NameInfo The name (with source location information) that 4412 /// is being checked for unexpanded parameter packs. 4413 /// 4414 /// \returns true if an error occurred, false otherwise. 4415 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4416 UnexpandedParameterPackContext UPPC); 4417 4418 /// \brief If the given template name contains an unexpanded parameter pack, 4419 /// diagnose the error. 4420 /// 4421 /// \param Loc The location of the template name. 4422 /// 4423 /// \param Template The template name that is being checked for unexpanded 4424 /// parameter packs. 4425 /// 4426 /// \returns true if an error occurred, false otherwise. 4427 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4428 TemplateName Template, 4429 UnexpandedParameterPackContext UPPC); 4430 4431 /// \brief If the given template argument contains an unexpanded parameter 4432 /// pack, diagnose the error. 4433 /// 4434 /// \param Arg The template argument that is being checked for unexpanded 4435 /// parameter packs. 4436 /// 4437 /// \returns true if an error occurred, false otherwise. 4438 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4439 UnexpandedParameterPackContext UPPC); 4440 4441 /// \brief Collect the set of unexpanded parameter packs within the given 4442 /// template argument. 4443 /// 4444 /// \param Arg The template argument that will be traversed to find 4445 /// unexpanded parameter packs. 4446 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4447 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4448 4449 /// \brief Collect the set of unexpanded parameter packs within the given 4450 /// template argument. 4451 /// 4452 /// \param Arg The template argument that will be traversed to find 4453 /// unexpanded parameter packs. 4454 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4455 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4456 4457 /// \brief Collect the set of unexpanded parameter packs within the given 4458 /// type. 4459 /// 4460 /// \param T The type that will be traversed to find 4461 /// unexpanded parameter packs. 4462 void collectUnexpandedParameterPacks(QualType T, 4463 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4464 4465 /// \brief Collect the set of unexpanded parameter packs within the given 4466 /// type. 4467 /// 4468 /// \param TL The type that will be traversed to find 4469 /// unexpanded parameter packs. 4470 void collectUnexpandedParameterPacks(TypeLoc TL, 4471 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4472 4473 /// \brief Collect the set of unexpanded parameter packs within the given 4474 /// nested-name-specifier. 4475 /// 4476 /// \param SS The nested-name-specifier that will be traversed to find 4477 /// unexpanded parameter packs. 4478 void collectUnexpandedParameterPacks(CXXScopeSpec &SS, 4479 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4480 4481 /// \brief Collect the set of unexpanded parameter packs within the given 4482 /// name. 4483 /// 4484 /// \param NameInfo The name that will be traversed to find 4485 /// unexpanded parameter packs. 4486 void collectUnexpandedParameterPacks(const DeclarationNameInfo &NameInfo, 4487 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4488 4489 /// \brief Invoked when parsing a template argument followed by an 4490 /// ellipsis, which creates a pack expansion. 4491 /// 4492 /// \param Arg The template argument preceding the ellipsis, which 4493 /// may already be invalid. 4494 /// 4495 /// \param EllipsisLoc The location of the ellipsis. 4496 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4497 SourceLocation EllipsisLoc); 4498 4499 /// \brief Invoked when parsing a type followed by an ellipsis, which 4500 /// creates a pack expansion. 4501 /// 4502 /// \param Type The type preceding the ellipsis, which will become 4503 /// the pattern of the pack expansion. 4504 /// 4505 /// \param EllipsisLoc The location of the ellipsis. 4506 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4507 4508 /// \brief Construct a pack expansion type from the pattern of the pack 4509 /// expansion. 4510 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4511 SourceLocation EllipsisLoc, 4512 llvm::Optional<unsigned> NumExpansions); 4513 4514 /// \brief Construct a pack expansion type from the pattern of the pack 4515 /// expansion. 4516 QualType CheckPackExpansion(QualType Pattern, 4517 SourceRange PatternRange, 4518 SourceLocation EllipsisLoc, 4519 llvm::Optional<unsigned> NumExpansions); 4520 4521 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4522 /// creates a pack expansion. 4523 /// 4524 /// \param Pattern The expression preceding the ellipsis, which will become 4525 /// the pattern of the pack expansion. 4526 /// 4527 /// \param EllipsisLoc The location of the ellipsis. 4528 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4529 4530 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4531 /// creates a pack expansion. 4532 /// 4533 /// \param Pattern The expression preceding the ellipsis, which will become 4534 /// the pattern of the pack expansion. 4535 /// 4536 /// \param EllipsisLoc The location of the ellipsis. 4537 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4538 llvm::Optional<unsigned> NumExpansions); 4539 4540 /// \brief Determine whether we could expand a pack expansion with the 4541 /// given set of parameter packs into separate arguments by repeatedly 4542 /// transforming the pattern. 4543 /// 4544 /// \param EllipsisLoc The location of the ellipsis that identifies the 4545 /// pack expansion. 4546 /// 4547 /// \param PatternRange The source range that covers the entire pattern of 4548 /// the pack expansion. 4549 /// 4550 /// \param Unexpanded The set of unexpanded parameter packs within the 4551 /// pattern. 4552 /// 4553 /// \param NumUnexpanded The number of unexpanded parameter packs in 4554 /// \p Unexpanded. 4555 /// 4556 /// \param ShouldExpand Will be set to \c true if the transformer should 4557 /// expand the corresponding pack expansions into separate arguments. When 4558 /// set, \c NumExpansions must also be set. 4559 /// 4560 /// \param RetainExpansion Whether the caller should add an unexpanded 4561 /// pack expansion after all of the expanded arguments. This is used 4562 /// when extending explicitly-specified template argument packs per 4563 /// C++0x [temp.arg.explicit]p9. 4564 /// 4565 /// \param NumExpansions The number of separate arguments that will be in 4566 /// the expanded form of the corresponding pack expansion. This is both an 4567 /// input and an output parameter, which can be set by the caller if the 4568 /// number of expansions is known a priori (e.g., due to a prior substitution) 4569 /// and will be set by the callee when the number of expansions is known. 4570 /// The callee must set this value when \c ShouldExpand is \c true; it may 4571 /// set this value in other cases. 4572 /// 4573 /// \returns true if an error occurred (e.g., because the parameter packs 4574 /// are to be instantiated with arguments of different lengths), false 4575 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4576 /// must be set. 4577 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4578 SourceRange PatternRange, 4579 llvm::ArrayRef<UnexpandedParameterPack> Unexpanded, 4580 const MultiLevelTemplateArgumentList &TemplateArgs, 4581 bool &ShouldExpand, 4582 bool &RetainExpansion, 4583 llvm::Optional<unsigned> &NumExpansions); 4584 4585 /// \brief Determine the number of arguments in the given pack expansion 4586 /// type. 4587 /// 4588 /// This routine already assumes that the pack expansion type can be 4589 /// expanded and that the number of arguments in the expansion is 4590 /// consistent across all of the unexpanded parameter packs in its pattern. 4591 unsigned getNumArgumentsInExpansion(QualType T, 4592 const MultiLevelTemplateArgumentList &TemplateArgs); 4593 4594 /// \brief Determine whether the given declarator contains any unexpanded 4595 /// parameter packs. 4596 /// 4597 /// This routine is used by the parser to disambiguate function declarators 4598 /// with an ellipsis prior to the ')', e.g., 4599 /// 4600 /// \code 4601 /// void f(T...); 4602 /// \endcode 4603 /// 4604 /// To determine whether we have an (unnamed) function parameter pack or 4605 /// a variadic function. 4606 /// 4607 /// \returns true if the declarator contains any unexpanded parameter packs, 4608 /// false otherwise. 4609 bool containsUnexpandedParameterPacks(Declarator &D); 4610 4611 //===--------------------------------------------------------------------===// 4612 // C++ Template Argument Deduction (C++ [temp.deduct]) 4613 //===--------------------------------------------------------------------===// 4614 4615 /// \brief Describes the result of template argument deduction. 4616 /// 4617 /// The TemplateDeductionResult enumeration describes the result of 4618 /// template argument deduction, as returned from 4619 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4620 /// structure provides additional information about the results of 4621 /// template argument deduction, e.g., the deduced template argument 4622 /// list (if successful) or the specific template parameters or 4623 /// deduced arguments that were involved in the failure. 4624 enum TemplateDeductionResult { 4625 /// \brief Template argument deduction was successful. 4626 TDK_Success = 0, 4627 /// \brief Template argument deduction exceeded the maximum template 4628 /// instantiation depth (which has already been diagnosed). 4629 TDK_InstantiationDepth, 4630 /// \brief Template argument deduction did not deduce a value 4631 /// for every template parameter. 4632 TDK_Incomplete, 4633 /// \brief Template argument deduction produced inconsistent 4634 /// deduced values for the given template parameter. 4635 TDK_Inconsistent, 4636 /// \brief Template argument deduction failed due to inconsistent 4637 /// cv-qualifiers on a template parameter type that would 4638 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4639 /// but were given a non-const "X". 4640 TDK_Underqualified, 4641 /// \brief Substitution of the deduced template argument values 4642 /// resulted in an error. 4643 TDK_SubstitutionFailure, 4644 /// \brief Substitution of the deduced template argument values 4645 /// into a non-deduced context produced a type or value that 4646 /// produces a type that does not match the original template 4647 /// arguments provided. 4648 TDK_NonDeducedMismatch, 4649 /// \brief When performing template argument deduction for a function 4650 /// template, there were too many call arguments. 4651 TDK_TooManyArguments, 4652 /// \brief When performing template argument deduction for a function 4653 /// template, there were too few call arguments. 4654 TDK_TooFewArguments, 4655 /// \brief The explicitly-specified template arguments were not valid 4656 /// template arguments for the given template. 4657 TDK_InvalidExplicitArguments, 4658 /// \brief The arguments included an overloaded function name that could 4659 /// not be resolved to a suitable function. 4660 TDK_FailedOverloadResolution 4661 }; 4662 4663 TemplateDeductionResult 4664 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4665 const TemplateArgumentList &TemplateArgs, 4666 sema::TemplateDeductionInfo &Info); 4667 4668 TemplateDeductionResult 4669 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4670 TemplateArgumentListInfo &ExplicitTemplateArgs, 4671 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4672 SmallVectorImpl<QualType> &ParamTypes, 4673 QualType *FunctionType, 4674 sema::TemplateDeductionInfo &Info); 4675 4676 /// brief A function argument from which we performed template argument 4677 // deduction for a call. 4678 struct OriginalCallArg { 4679 OriginalCallArg(QualType OriginalParamType, 4680 unsigned ArgIdx, 4681 QualType OriginalArgType) 4682 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4683 OriginalArgType(OriginalArgType) { } 4684 4685 QualType OriginalParamType; 4686 unsigned ArgIdx; 4687 QualType OriginalArgType; 4688 }; 4689 4690 TemplateDeductionResult 4691 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4692 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4693 unsigned NumExplicitlySpecified, 4694 FunctionDecl *&Specialization, 4695 sema::TemplateDeductionInfo &Info, 4696 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4697 4698 TemplateDeductionResult 4699 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4700 TemplateArgumentListInfo *ExplicitTemplateArgs, 4701 Expr **Args, unsigned NumArgs, 4702 FunctionDecl *&Specialization, 4703 sema::TemplateDeductionInfo &Info); 4704 4705 TemplateDeductionResult 4706 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4707 TemplateArgumentListInfo *ExplicitTemplateArgs, 4708 QualType ArgFunctionType, 4709 FunctionDecl *&Specialization, 4710 sema::TemplateDeductionInfo &Info); 4711 4712 TemplateDeductionResult 4713 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4714 QualType ToType, 4715 CXXConversionDecl *&Specialization, 4716 sema::TemplateDeductionInfo &Info); 4717 4718 TemplateDeductionResult 4719 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4720 TemplateArgumentListInfo *ExplicitTemplateArgs, 4721 FunctionDecl *&Specialization, 4722 sema::TemplateDeductionInfo &Info); 4723 4724 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *&Initializer, 4725 TypeSourceInfo *&Result); 4726 void DiagnoseAutoDeductionFailure(VarDecl *VDecl, Expr *Init); 4727 4728 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4729 FunctionTemplateDecl *FT2, 4730 SourceLocation Loc, 4731 TemplatePartialOrderingContext TPOC, 4732 unsigned NumCallArguments); 4733 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4734 UnresolvedSetIterator SEnd, 4735 TemplatePartialOrderingContext TPOC, 4736 unsigned NumCallArguments, 4737 SourceLocation Loc, 4738 const PartialDiagnostic &NoneDiag, 4739 const PartialDiagnostic &AmbigDiag, 4740 const PartialDiagnostic &CandidateDiag, 4741 bool Complain = true, 4742 QualType TargetType = QualType()); 4743 4744 ClassTemplatePartialSpecializationDecl * 4745 getMoreSpecializedPartialSpecialization( 4746 ClassTemplatePartialSpecializationDecl *PS1, 4747 ClassTemplatePartialSpecializationDecl *PS2, 4748 SourceLocation Loc); 4749 4750 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4751 bool OnlyDeduced, 4752 unsigned Depth, 4753 SmallVectorImpl<bool> &Used); 4754 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4755 SmallVectorImpl<bool> &Deduced) { 4756 return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced); 4757 } 4758 static void MarkDeducedTemplateParameters(ASTContext &Ctx, 4759 FunctionTemplateDecl *FunctionTemplate, 4760 SmallVectorImpl<bool> &Deduced); 4761 4762 //===--------------------------------------------------------------------===// 4763 // C++ Template Instantiation 4764 // 4765 4766 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4767 const TemplateArgumentList *Innermost = 0, 4768 bool RelativeToPrimary = false, 4769 const FunctionDecl *Pattern = 0); 4770 4771 /// \brief A template instantiation that is currently in progress. 4772 struct ActiveTemplateInstantiation { 4773 /// \brief The kind of template instantiation we are performing 4774 enum InstantiationKind { 4775 /// We are instantiating a template declaration. The entity is 4776 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4777 TemplateInstantiation, 4778 4779 /// We are instantiating a default argument for a template 4780 /// parameter. The Entity is the template, and 4781 /// TemplateArgs/NumTemplateArguments provides the template 4782 /// arguments as specified. 4783 /// FIXME: Use a TemplateArgumentList 4784 DefaultTemplateArgumentInstantiation, 4785 4786 /// We are instantiating a default argument for a function. 4787 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4788 /// provides the template arguments as specified. 4789 DefaultFunctionArgumentInstantiation, 4790 4791 /// We are substituting explicit template arguments provided for 4792 /// a function template. The entity is a FunctionTemplateDecl. 4793 ExplicitTemplateArgumentSubstitution, 4794 4795 /// We are substituting template argument determined as part of 4796 /// template argument deduction for either a class template 4797 /// partial specialization or a function template. The 4798 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4799 /// a FunctionTemplateDecl. 4800 DeducedTemplateArgumentSubstitution, 4801 4802 /// We are substituting prior template arguments into a new 4803 /// template parameter. The template parameter itself is either a 4804 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4805 PriorTemplateArgumentSubstitution, 4806 4807 /// We are checking the validity of a default template argument that 4808 /// has been used when naming a template-id. 4809 DefaultTemplateArgumentChecking 4810 } Kind; 4811 4812 /// \brief The point of instantiation within the source code. 4813 SourceLocation PointOfInstantiation; 4814 4815 /// \brief The template (or partial specialization) in which we are 4816 /// performing the instantiation, for substitutions of prior template 4817 /// arguments. 4818 NamedDecl *Template; 4819 4820 /// \brief The entity that is being instantiated. 4821 uintptr_t Entity; 4822 4823 /// \brief The list of template arguments we are substituting, if they 4824 /// are not part of the entity. 4825 const TemplateArgument *TemplateArgs; 4826 4827 /// \brief The number of template arguments in TemplateArgs. 4828 unsigned NumTemplateArgs; 4829 4830 /// \brief The template deduction info object associated with the 4831 /// substitution or checking of explicit or deduced template arguments. 4832 sema::TemplateDeductionInfo *DeductionInfo; 4833 4834 /// \brief The source range that covers the construct that cause 4835 /// the instantiation, e.g., the template-id that causes a class 4836 /// template instantiation. 4837 SourceRange InstantiationRange; 4838 4839 ActiveTemplateInstantiation() 4840 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4841 NumTemplateArgs(0), DeductionInfo(0) {} 4842 4843 /// \brief Determines whether this template is an actual instantiation 4844 /// that should be counted toward the maximum instantiation depth. 4845 bool isInstantiationRecord() const; 4846 4847 friend bool operator==(const ActiveTemplateInstantiation &X, 4848 const ActiveTemplateInstantiation &Y) { 4849 if (X.Kind != Y.Kind) 4850 return false; 4851 4852 if (X.Entity != Y.Entity) 4853 return false; 4854 4855 switch (X.Kind) { 4856 case TemplateInstantiation: 4857 return true; 4858 4859 case PriorTemplateArgumentSubstitution: 4860 case DefaultTemplateArgumentChecking: 4861 if (X.Template != Y.Template) 4862 return false; 4863 4864 // Fall through 4865 4866 case DefaultTemplateArgumentInstantiation: 4867 case ExplicitTemplateArgumentSubstitution: 4868 case DeducedTemplateArgumentSubstitution: 4869 case DefaultFunctionArgumentInstantiation: 4870 return X.TemplateArgs == Y.TemplateArgs; 4871 4872 } 4873 4874 llvm_unreachable("Invalid InstantiationKind!"); 4875 } 4876 4877 friend bool operator!=(const ActiveTemplateInstantiation &X, 4878 const ActiveTemplateInstantiation &Y) { 4879 return !(X == Y); 4880 } 4881 }; 4882 4883 /// \brief List of active template instantiations. 4884 /// 4885 /// This vector is treated as a stack. As one template instantiation 4886 /// requires another template instantiation, additional 4887 /// instantiations are pushed onto the stack up to a 4888 /// user-configurable limit LangOptions::InstantiationDepth. 4889 SmallVector<ActiveTemplateInstantiation, 16> 4890 ActiveTemplateInstantiations; 4891 4892 /// \brief Whether we are in a SFINAE context that is not associated with 4893 /// template instantiation. 4894 /// 4895 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4896 /// of a template instantiation or template argument deduction. 4897 bool InNonInstantiationSFINAEContext; 4898 4899 /// \brief The number of ActiveTemplateInstantiation entries in 4900 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4901 /// therefore, should not be counted as part of the instantiation depth. 4902 unsigned NonInstantiationEntries; 4903 4904 /// \brief The last template from which a template instantiation 4905 /// error or warning was produced. 4906 /// 4907 /// This value is used to suppress printing of redundant template 4908 /// instantiation backtraces when there are multiple errors in the 4909 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4910 /// to implement it anywhere else. 4911 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4912 4913 /// \brief The current index into pack expansion arguments that will be 4914 /// used for substitution of parameter packs. 4915 /// 4916 /// The pack expansion index will be -1 to indicate that parameter packs 4917 /// should be instantiated as themselves. Otherwise, the index specifies 4918 /// which argument within the parameter pack will be used for substitution. 4919 int ArgumentPackSubstitutionIndex; 4920 4921 /// \brief RAII object used to change the argument pack substitution index 4922 /// within a \c Sema object. 4923 /// 4924 /// See \c ArgumentPackSubstitutionIndex for more information. 4925 class ArgumentPackSubstitutionIndexRAII { 4926 Sema &Self; 4927 int OldSubstitutionIndex; 4928 4929 public: 4930 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4931 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4932 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4933 } 4934 4935 ~ArgumentPackSubstitutionIndexRAII() { 4936 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4937 } 4938 }; 4939 4940 friend class ArgumentPackSubstitutionRAII; 4941 4942 /// \brief The stack of calls expression undergoing template instantiation. 4943 /// 4944 /// The top of this stack is used by a fixit instantiating unresolved 4945 /// function calls to fix the AST to match the textual change it prints. 4946 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4947 4948 /// \brief For each declaration that involved template argument deduction, the 4949 /// set of diagnostics that were suppressed during that template argument 4950 /// deduction. 4951 /// 4952 /// FIXME: Serialize this structure to the AST file. 4953 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4954 SuppressedDiagnostics; 4955 4956 /// \brief A stack object to be created when performing template 4957 /// instantiation. 4958 /// 4959 /// Construction of an object of type \c InstantiatingTemplate 4960 /// pushes the current instantiation onto the stack of active 4961 /// instantiations. If the size of this stack exceeds the maximum 4962 /// number of recursive template instantiations, construction 4963 /// produces an error and evaluates true. 4964 /// 4965 /// Destruction of this object will pop the named instantiation off 4966 /// the stack. 4967 struct InstantiatingTemplate { 4968 /// \brief Note that we are instantiating a class template, 4969 /// function template, or a member thereof. 4970 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4971 Decl *Entity, 4972 SourceRange InstantiationRange = SourceRange()); 4973 4974 /// \brief Note that we are instantiating a default argument in a 4975 /// template-id. 4976 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4977 TemplateDecl *Template, 4978 const TemplateArgument *TemplateArgs, 4979 unsigned NumTemplateArgs, 4980 SourceRange InstantiationRange = SourceRange()); 4981 4982 /// \brief Note that we are instantiating a default argument in a 4983 /// template-id. 4984 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4985 FunctionTemplateDecl *FunctionTemplate, 4986 const TemplateArgument *TemplateArgs, 4987 unsigned NumTemplateArgs, 4988 ActiveTemplateInstantiation::InstantiationKind Kind, 4989 sema::TemplateDeductionInfo &DeductionInfo, 4990 SourceRange InstantiationRange = SourceRange()); 4991 4992 /// \brief Note that we are instantiating as part of template 4993 /// argument deduction for a class template partial 4994 /// specialization. 4995 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4996 ClassTemplatePartialSpecializationDecl *PartialSpec, 4997 const TemplateArgument *TemplateArgs, 4998 unsigned NumTemplateArgs, 4999 sema::TemplateDeductionInfo &DeductionInfo, 5000 SourceRange InstantiationRange = SourceRange()); 5001 5002 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5003 ParmVarDecl *Param, 5004 const TemplateArgument *TemplateArgs, 5005 unsigned NumTemplateArgs, 5006 SourceRange InstantiationRange = SourceRange()); 5007 5008 /// \brief Note that we are substituting prior template arguments into a 5009 /// non-type or template template parameter. 5010 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5011 NamedDecl *Template, 5012 NonTypeTemplateParmDecl *Param, 5013 const TemplateArgument *TemplateArgs, 5014 unsigned NumTemplateArgs, 5015 SourceRange InstantiationRange); 5016 5017 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5018 NamedDecl *Template, 5019 TemplateTemplateParmDecl *Param, 5020 const TemplateArgument *TemplateArgs, 5021 unsigned NumTemplateArgs, 5022 SourceRange InstantiationRange); 5023 5024 /// \brief Note that we are checking the default template argument 5025 /// against the template parameter for a given template-id. 5026 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 5027 TemplateDecl *Template, 5028 NamedDecl *Param, 5029 const TemplateArgument *TemplateArgs, 5030 unsigned NumTemplateArgs, 5031 SourceRange InstantiationRange); 5032 5033 5034 /// \brief Note that we have finished instantiating this template. 5035 void Clear(); 5036 5037 ~InstantiatingTemplate() { Clear(); } 5038 5039 /// \brief Determines whether we have exceeded the maximum 5040 /// recursive template instantiations. 5041 operator bool() const { return Invalid; } 5042 5043 private: 5044 Sema &SemaRef; 5045 bool Invalid; 5046 bool SavedInNonInstantiationSFINAEContext; 5047 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 5048 SourceRange InstantiationRange); 5049 5050 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 5051 5052 InstantiatingTemplate& 5053 operator=(const InstantiatingTemplate&); // not implemented 5054 }; 5055 5056 void PrintInstantiationStack(); 5057 5058 /// \brief Determines whether we are currently in a context where 5059 /// template argument substitution failures are not considered 5060 /// errors. 5061 /// 5062 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 5063 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 5064 /// template-deduction context object, which can be used to capture 5065 /// diagnostics that will be suppressed. 5066 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 5067 5068 /// \brief RAII class used to determine whether SFINAE has 5069 /// trapped any errors that occur during template argument 5070 /// deduction.` 5071 class SFINAETrap { 5072 Sema &SemaRef; 5073 unsigned PrevSFINAEErrors; 5074 bool PrevInNonInstantiationSFINAEContext; 5075 bool PrevAccessCheckingSFINAE; 5076 5077 public: 5078 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 5079 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 5080 PrevInNonInstantiationSFINAEContext( 5081 SemaRef.InNonInstantiationSFINAEContext), 5082 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 5083 { 5084 if (!SemaRef.isSFINAEContext()) 5085 SemaRef.InNonInstantiationSFINAEContext = true; 5086 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 5087 } 5088 5089 ~SFINAETrap() { 5090 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 5091 SemaRef.InNonInstantiationSFINAEContext 5092 = PrevInNonInstantiationSFINAEContext; 5093 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 5094 } 5095 5096 /// \brief Determine whether any SFINAE errors have been trapped. 5097 bool hasErrorOccurred() const { 5098 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 5099 } 5100 }; 5101 5102 /// \brief The current instantiation scope used to store local 5103 /// variables. 5104 LocalInstantiationScope *CurrentInstantiationScope; 5105 5106 /// \brief The number of typos corrected by CorrectTypo. 5107 unsigned TyposCorrected; 5108 5109 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 5110 UnqualifiedTyposCorrectedMap; 5111 5112 /// \brief A cache containing the results of typo correction for unqualified 5113 /// name lookup. 5114 /// 5115 /// The string is the string that we corrected to (which may be empty, if 5116 /// there was no correction), while the boolean will be true when the 5117 /// string represents a keyword. 5118 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 5119 5120 /// \brief Worker object for performing CFG-based warnings. 5121 sema::AnalysisBasedWarnings AnalysisWarnings; 5122 5123 /// \brief An entity for which implicit template instantiation is required. 5124 /// 5125 /// The source location associated with the declaration is the first place in 5126 /// the source code where the declaration was "used". It is not necessarily 5127 /// the point of instantiation (which will be either before or after the 5128 /// namespace-scope declaration that triggered this implicit instantiation), 5129 /// However, it is the location that diagnostics should generally refer to, 5130 /// because users will need to know what code triggered the instantiation. 5131 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 5132 5133 /// \brief The queue of implicit template instantiations that are required 5134 /// but have not yet been performed. 5135 std::deque<PendingImplicitInstantiation> PendingInstantiations; 5136 5137 /// \brief The queue of implicit template instantiations that are required 5138 /// and must be performed within the current local scope. 5139 /// 5140 /// This queue is only used for member functions of local classes in 5141 /// templates, which must be instantiated in the same scope as their 5142 /// enclosing function, so that they can reference function-local 5143 /// types, static variables, enumerators, etc. 5144 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 5145 5146 void PerformPendingInstantiations(bool LocalOnly = false); 5147 5148 TypeSourceInfo *SubstType(TypeSourceInfo *T, 5149 const MultiLevelTemplateArgumentList &TemplateArgs, 5150 SourceLocation Loc, DeclarationName Entity); 5151 5152 QualType SubstType(QualType T, 5153 const MultiLevelTemplateArgumentList &TemplateArgs, 5154 SourceLocation Loc, DeclarationName Entity); 5155 5156 TypeSourceInfo *SubstType(TypeLoc TL, 5157 const MultiLevelTemplateArgumentList &TemplateArgs, 5158 SourceLocation Loc, DeclarationName Entity); 5159 5160 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 5161 const MultiLevelTemplateArgumentList &TemplateArgs, 5162 SourceLocation Loc, 5163 DeclarationName Entity); 5164 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 5165 const MultiLevelTemplateArgumentList &TemplateArgs, 5166 int indexAdjustment, 5167 llvm::Optional<unsigned> NumExpansions); 5168 bool SubstParmTypes(SourceLocation Loc, 5169 ParmVarDecl **Params, unsigned NumParams, 5170 const MultiLevelTemplateArgumentList &TemplateArgs, 5171 SmallVectorImpl<QualType> &ParamTypes, 5172 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 5173 ExprResult SubstExpr(Expr *E, 5174 const MultiLevelTemplateArgumentList &TemplateArgs); 5175 5176 /// \brief Substitute the given template arguments into a list of 5177 /// expressions, expanding pack expansions if required. 5178 /// 5179 /// \param Exprs The list of expressions to substitute into. 5180 /// 5181 /// \param NumExprs The number of expressions in \p Exprs. 5182 /// 5183 /// \param IsCall Whether this is some form of call, in which case 5184 /// default arguments will be dropped. 5185 /// 5186 /// \param TemplateArgs The set of template arguments to substitute. 5187 /// 5188 /// \param Outputs Will receive all of the substituted arguments. 5189 /// 5190 /// \returns true if an error occurred, false otherwise. 5191 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 5192 const MultiLevelTemplateArgumentList &TemplateArgs, 5193 SmallVectorImpl<Expr *> &Outputs); 5194 5195 StmtResult SubstStmt(Stmt *S, 5196 const MultiLevelTemplateArgumentList &TemplateArgs); 5197 5198 Decl *SubstDecl(Decl *D, DeclContext *Owner, 5199 const MultiLevelTemplateArgumentList &TemplateArgs); 5200 5201 bool 5202 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 5203 CXXRecordDecl *Pattern, 5204 const MultiLevelTemplateArgumentList &TemplateArgs); 5205 5206 bool 5207 InstantiateClass(SourceLocation PointOfInstantiation, 5208 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 5209 const MultiLevelTemplateArgumentList &TemplateArgs, 5210 TemplateSpecializationKind TSK, 5211 bool Complain = true); 5212 5213 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 5214 const Decl *Pattern, Decl *Inst); 5215 5216 bool 5217 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 5218 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5219 TemplateSpecializationKind TSK, 5220 bool Complain = true); 5221 5222 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 5223 CXXRecordDecl *Instantiation, 5224 const MultiLevelTemplateArgumentList &TemplateArgs, 5225 TemplateSpecializationKind TSK); 5226 5227 void InstantiateClassTemplateSpecializationMembers( 5228 SourceLocation PointOfInstantiation, 5229 ClassTemplateSpecializationDecl *ClassTemplateSpec, 5230 TemplateSpecializationKind TSK); 5231 5232 NestedNameSpecifierLoc 5233 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 5234 const MultiLevelTemplateArgumentList &TemplateArgs); 5235 5236 DeclarationNameInfo 5237 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 5238 const MultiLevelTemplateArgumentList &TemplateArgs); 5239 TemplateName 5240 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 5241 SourceLocation Loc, 5242 const MultiLevelTemplateArgumentList &TemplateArgs); 5243 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 5244 TemplateArgumentListInfo &Result, 5245 const MultiLevelTemplateArgumentList &TemplateArgs); 5246 5247 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 5248 FunctionDecl *Function, 5249 bool Recursive = false, 5250 bool DefinitionRequired = false); 5251 void InstantiateStaticDataMemberDefinition( 5252 SourceLocation PointOfInstantiation, 5253 VarDecl *Var, 5254 bool Recursive = false, 5255 bool DefinitionRequired = false); 5256 5257 void InstantiateMemInitializers(CXXConstructorDecl *New, 5258 const CXXConstructorDecl *Tmpl, 5259 const MultiLevelTemplateArgumentList &TemplateArgs); 5260 bool InstantiateInitializer(Expr *Init, 5261 const MultiLevelTemplateArgumentList &TemplateArgs, 5262 SourceLocation &LParenLoc, 5263 ASTOwningVector<Expr*> &NewArgs, 5264 SourceLocation &RParenLoc); 5265 5266 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5267 const MultiLevelTemplateArgumentList &TemplateArgs); 5268 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5269 const MultiLevelTemplateArgumentList &TemplateArgs); 5270 5271 // Objective-C declarations. 5272 enum ObjCContainerKind { 5273 OCK_None = -1, 5274 OCK_Interface = 0, 5275 OCK_Protocol, 5276 OCK_Category, 5277 OCK_ClassExtension, 5278 OCK_Implementation, 5279 OCK_CategoryImplementation 5280 }; 5281 ObjCContainerKind getObjCContainerKind() const; 5282 5283 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5284 IdentifierInfo *ClassName, 5285 SourceLocation ClassLoc, 5286 IdentifierInfo *SuperName, 5287 SourceLocation SuperLoc, 5288 Decl * const *ProtoRefs, 5289 unsigned NumProtoRefs, 5290 const SourceLocation *ProtoLocs, 5291 SourceLocation EndProtoLoc, 5292 AttributeList *AttrList); 5293 5294 Decl *ActOnCompatiblityAlias( 5295 SourceLocation AtCompatibilityAliasLoc, 5296 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5297 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5298 5299 bool CheckForwardProtocolDeclarationForCircularDependency( 5300 IdentifierInfo *PName, 5301 SourceLocation &PLoc, SourceLocation PrevLoc, 5302 const ObjCList<ObjCProtocolDecl> &PList); 5303 5304 Decl *ActOnStartProtocolInterface( 5305 SourceLocation AtProtoInterfaceLoc, 5306 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5307 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5308 const SourceLocation *ProtoLocs, 5309 SourceLocation EndProtoLoc, 5310 AttributeList *AttrList); 5311 5312 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5313 IdentifierInfo *ClassName, 5314 SourceLocation ClassLoc, 5315 IdentifierInfo *CategoryName, 5316 SourceLocation CategoryLoc, 5317 Decl * const *ProtoRefs, 5318 unsigned NumProtoRefs, 5319 const SourceLocation *ProtoLocs, 5320 SourceLocation EndProtoLoc); 5321 5322 Decl *ActOnStartClassImplementation( 5323 SourceLocation AtClassImplLoc, 5324 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5325 IdentifierInfo *SuperClassname, 5326 SourceLocation SuperClassLoc); 5327 5328 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5329 IdentifierInfo *ClassName, 5330 SourceLocation ClassLoc, 5331 IdentifierInfo *CatName, 5332 SourceLocation CatLoc); 5333 5334 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5335 IdentifierInfo **IdentList, 5336 SourceLocation *IdentLocs, 5337 unsigned NumElts); 5338 5339 DeclGroupPtrTy ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5340 const IdentifierLocPair *IdentList, 5341 unsigned NumElts, 5342 AttributeList *attrList); 5343 5344 void FindProtocolDeclaration(bool WarnOnDeclarations, 5345 const IdentifierLocPair *ProtocolId, 5346 unsigned NumProtocols, 5347 SmallVectorImpl<Decl *> &Protocols); 5348 5349 /// Ensure attributes are consistent with type. 5350 /// \param [in, out] Attributes The attributes to check; they will 5351 /// be modified to be consistent with \arg PropertyTy. 5352 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5353 SourceLocation Loc, 5354 unsigned &Attributes); 5355 5356 /// Process the specified property declaration and create decls for the 5357 /// setters and getters as needed. 5358 /// \param property The property declaration being processed 5359 /// \param DC The semantic container for the property 5360 /// \param redeclaredProperty Declaration for property if redeclared 5361 /// in class extension. 5362 /// \param lexicalDC Container for redeclaredProperty. 5363 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5364 ObjCContainerDecl *DC, 5365 ObjCPropertyDecl *redeclaredProperty = 0, 5366 ObjCContainerDecl *lexicalDC = 0); 5367 5368 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5369 ObjCPropertyDecl *SuperProperty, 5370 const IdentifierInfo *Name); 5371 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5372 5373 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5374 ObjCMethodDecl *MethodDecl, 5375 bool IsInstance); 5376 5377 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5378 5379 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5380 ObjCInterfaceDecl *ID); 5381 5382 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5383 ObjCProtocolDecl *PDecl); 5384 5385 Decl *ActOnAtEnd(Scope *S, SourceRange AtEnd, 5386 Decl **allMethods = 0, unsigned allNum = 0, 5387 Decl **allProperties = 0, unsigned pNum = 0, 5388 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5389 5390 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5391 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5392 Selector GetterSel, Selector SetterSel, 5393 bool *OverridingProperty, 5394 tok::ObjCKeywordKind MethodImplKind, 5395 DeclContext *lexicalDC = 0); 5396 5397 Decl *ActOnPropertyImplDecl(Scope *S, 5398 SourceLocation AtLoc, 5399 SourceLocation PropertyLoc, 5400 bool ImplKind, 5401 IdentifierInfo *PropertyId, 5402 IdentifierInfo *PropertyIvar, 5403 SourceLocation PropertyIvarLoc); 5404 5405 enum ObjCSpecialMethodKind { 5406 OSMK_None, 5407 OSMK_Alloc, 5408 OSMK_New, 5409 OSMK_Copy, 5410 OSMK_RetainingInit, 5411 OSMK_NonRetainingInit 5412 }; 5413 5414 struct ObjCArgInfo { 5415 IdentifierInfo *Name; 5416 SourceLocation NameLoc; 5417 // The Type is null if no type was specified, and the DeclSpec is invalid 5418 // in this case. 5419 ParsedType Type; 5420 ObjCDeclSpec DeclSpec; 5421 5422 /// ArgAttrs - Attribute list for this argument. 5423 AttributeList *ArgAttrs; 5424 }; 5425 5426 Decl *ActOnMethodDeclaration( 5427 Scope *S, 5428 SourceLocation BeginLoc, // location of the + or -. 5429 SourceLocation EndLoc, // location of the ; or {. 5430 tok::TokenKind MethodType, 5431 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5432 ArrayRef<SourceLocation> SelectorLocs, Selector Sel, 5433 // optional arguments. The number of types/arguments is obtained 5434 // from the Sel.getNumArgs(). 5435 ObjCArgInfo *ArgInfo, 5436 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5437 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5438 bool isVariadic, bool MethodDefinition); 5439 5440 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5441 // Will search "local" class/category implementations for a method decl. 5442 // Will also search in class's root looking for instance method. 5443 // Returns 0 if no method is found. 5444 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5445 ObjCInterfaceDecl *CDecl); 5446 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5447 ObjCInterfaceDecl *ClassDecl); 5448 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5449 const ObjCObjectPointerType *OPT, 5450 bool IsInstance); 5451 ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty, 5452 bool IsInstance); 5453 5454 bool inferObjCARCLifetime(ValueDecl *decl); 5455 5456 ExprResult 5457 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5458 Expr *BaseExpr, 5459 SourceLocation OpLoc, 5460 DeclarationName MemberName, 5461 SourceLocation MemberLoc, 5462 SourceLocation SuperLoc, QualType SuperType, 5463 bool Super); 5464 5465 ExprResult 5466 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5467 IdentifierInfo &propertyName, 5468 SourceLocation receiverNameLoc, 5469 SourceLocation propertyNameLoc); 5470 5471 ObjCMethodDecl *tryCaptureObjCSelf(); 5472 5473 /// \brief Describes the kind of message expression indicated by a message 5474 /// send that starts with an identifier. 5475 enum ObjCMessageKind { 5476 /// \brief The message is sent to 'super'. 5477 ObjCSuperMessage, 5478 /// \brief The message is an instance message. 5479 ObjCInstanceMessage, 5480 /// \brief The message is a class message, and the identifier is a type 5481 /// name. 5482 ObjCClassMessage 5483 }; 5484 5485 ObjCMessageKind getObjCMessageKind(Scope *S, 5486 IdentifierInfo *Name, 5487 SourceLocation NameLoc, 5488 bool IsSuper, 5489 bool HasTrailingDot, 5490 ParsedType &ReceiverType); 5491 5492 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5493 Selector Sel, 5494 SourceLocation LBracLoc, 5495 ArrayRef<SourceLocation> SelectorLocs, 5496 SourceLocation RBracLoc, 5497 MultiExprArg Args); 5498 5499 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 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 BuildClassMessageImplicit(QualType ReceiverType, 5511 bool isSuperReceiver, 5512 SourceLocation Loc, 5513 Selector Sel, 5514 ObjCMethodDecl *Method, 5515 MultiExprArg Args); 5516 5517 ExprResult ActOnClassMessage(Scope *S, 5518 ParsedType Receiver, 5519 Selector Sel, 5520 SourceLocation LBracLoc, 5521 ArrayRef<SourceLocation> SelectorLocs, 5522 SourceLocation RBracLoc, 5523 MultiExprArg Args); 5524 5525 ExprResult BuildInstanceMessage(Expr *Receiver, 5526 QualType ReceiverType, 5527 SourceLocation SuperLoc, 5528 Selector Sel, 5529 ObjCMethodDecl *Method, 5530 SourceLocation LBracLoc, 5531 ArrayRef<SourceLocation> SelectorLocs, 5532 SourceLocation RBracLoc, 5533 MultiExprArg Args, 5534 bool isImplicit = false); 5535 5536 ExprResult BuildInstanceMessageImplicit(Expr *Receiver, 5537 QualType ReceiverType, 5538 SourceLocation Loc, 5539 Selector Sel, 5540 ObjCMethodDecl *Method, 5541 MultiExprArg Args); 5542 5543 ExprResult ActOnInstanceMessage(Scope *S, 5544 Expr *Receiver, 5545 Selector Sel, 5546 SourceLocation LBracLoc, 5547 ArrayRef<SourceLocation> SelectorLocs, 5548 SourceLocation RBracLoc, 5549 MultiExprArg Args); 5550 5551 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5552 ObjCBridgeCastKind Kind, 5553 SourceLocation BridgeKeywordLoc, 5554 TypeSourceInfo *TSInfo, 5555 Expr *SubExpr); 5556 5557 ExprResult ActOnObjCBridgedCast(Scope *S, 5558 SourceLocation LParenLoc, 5559 ObjCBridgeCastKind Kind, 5560 SourceLocation BridgeKeywordLoc, 5561 ParsedType Type, 5562 SourceLocation RParenLoc, 5563 Expr *SubExpr); 5564 5565 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5566 5567 /// \brief Check whether the given new method is a valid override of the 5568 /// given overridden method, and set any properties that should be inherited. 5569 void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5570 const ObjCMethodDecl *Overridden, 5571 bool IsImplementation); 5572 5573 /// \brief Check whether the given method overrides any methods in its class, 5574 /// calling \c CheckObjCMethodOverride for each overridden method. 5575 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5576 5577 enum PragmaOptionsAlignKind { 5578 POAK_Native, // #pragma options align=native 5579 POAK_Natural, // #pragma options align=natural 5580 POAK_Packed, // #pragma options align=packed 5581 POAK_Power, // #pragma options align=power 5582 POAK_Mac68k, // #pragma options align=mac68k 5583 POAK_Reset // #pragma options align=reset 5584 }; 5585 5586 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5587 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5588 SourceLocation PragmaLoc, 5589 SourceLocation KindLoc); 5590 5591 enum PragmaPackKind { 5592 PPK_Default, // #pragma pack([n]) 5593 PPK_Show, // #pragma pack(show), only supported by MSVC. 5594 PPK_Push, // #pragma pack(push, [identifier], [n]) 5595 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5596 }; 5597 5598 enum PragmaMSStructKind { 5599 PMSST_OFF, // #pragms ms_struct off 5600 PMSST_ON // #pragms ms_struct on 5601 }; 5602 5603 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5604 void ActOnPragmaPack(PragmaPackKind Kind, 5605 IdentifierInfo *Name, 5606 Expr *Alignment, 5607 SourceLocation PragmaLoc, 5608 SourceLocation LParenLoc, 5609 SourceLocation RParenLoc); 5610 5611 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5612 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5613 5614 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5615 void ActOnPragmaUnused(const Token &Identifier, 5616 Scope *curScope, 5617 SourceLocation PragmaLoc); 5618 5619 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5620 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5621 SourceLocation PragmaLoc); 5622 5623 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5624 SourceLocation Loc); 5625 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5626 5627 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5628 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5629 SourceLocation PragmaLoc, 5630 SourceLocation WeakNameLoc); 5631 5632 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5633 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5634 IdentifierInfo* AliasName, 5635 SourceLocation PragmaLoc, 5636 SourceLocation WeakNameLoc, 5637 SourceLocation AliasNameLoc); 5638 5639 /// ActOnPragmaFPContract - Called on well formed 5640 /// #pragma {STDC,OPENCL} FP_CONTRACT 5641 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5642 5643 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5644 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5645 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5646 5647 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5648 void AddMsStructLayoutForRecord(RecordDecl *RD); 5649 5650 /// FreePackedContext - Deallocate and null out PackContext. 5651 void FreePackedContext(); 5652 5653 /// PushNamespaceVisibilityAttr - Note that we've entered a 5654 /// namespace with a visibility attribute. 5655 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5656 5657 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5658 /// add an appropriate visibility attribute. 5659 void AddPushedVisibilityAttribute(Decl *RD); 5660 5661 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5662 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5663 void PopPragmaVisibility(); 5664 5665 /// FreeVisContext - Deallocate and null out VisContext. 5666 void FreeVisContext(); 5667 5668 /// AddCFAuditedAttribute - Check whether we're currently within 5669 /// '#pragma clang arc_cf_code_audited' and, if so, consider adding 5670 /// the appropriate attribute. 5671 void AddCFAuditedAttribute(Decl *D); 5672 5673 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5674 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5675 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5676 5677 /// \brief The kind of conversion being performed. 5678 enum CheckedConversionKind { 5679 /// \brief An implicit conversion. 5680 CCK_ImplicitConversion, 5681 /// \brief A C-style cast. 5682 CCK_CStyleCast, 5683 /// \brief A functional-style cast. 5684 CCK_FunctionalCast, 5685 /// \brief A cast other than a C-style cast. 5686 CCK_OtherCast 5687 }; 5688 5689 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5690 /// cast. If there is already an implicit cast, merge into the existing one. 5691 /// If isLvalue, the result of the cast is an lvalue. 5692 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5693 ExprValueKind VK = VK_RValue, 5694 const CXXCastPath *BasePath = 0, 5695 CheckedConversionKind CCK 5696 = CCK_ImplicitConversion); 5697 5698 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5699 /// to the conversion from scalar type ScalarTy to the Boolean type. 5700 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5701 5702 /// IgnoredValueConversions - Given that an expression's result is 5703 /// syntactically ignored, perform any conversions that are 5704 /// required. 5705 ExprResult IgnoredValueConversions(Expr *E); 5706 5707 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5708 // functions and arrays to their respective pointers (C99 6.3.2.1). 5709 ExprResult UsualUnaryConversions(Expr *E); 5710 5711 // DefaultFunctionArrayConversion - converts functions and arrays 5712 // to their respective pointers (C99 6.3.2.1). 5713 ExprResult DefaultFunctionArrayConversion(Expr *E); 5714 5715 // DefaultFunctionArrayLvalueConversion - converts functions and 5716 // arrays to their respective pointers and performs the 5717 // lvalue-to-rvalue conversion. 5718 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5719 5720 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5721 // the operand. This is DefaultFunctionArrayLvalueConversion, 5722 // except that it assumes the operand isn't of function or array 5723 // type. 5724 ExprResult DefaultLvalueConversion(Expr *E); 5725 5726 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5727 // do not have a prototype. Integer promotions are performed on each 5728 // argument, and arguments that have type float are promoted to double. 5729 ExprResult DefaultArgumentPromotion(Expr *E); 5730 5731 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5732 enum VariadicCallType { 5733 VariadicFunction, 5734 VariadicBlock, 5735 VariadicMethod, 5736 VariadicConstructor, 5737 VariadicDoesNotApply 5738 }; 5739 5740 /// GatherArgumentsForCall - Collector argument expressions for various 5741 /// form of call prototypes. 5742 bool GatherArgumentsForCall(SourceLocation CallLoc, 5743 FunctionDecl *FDecl, 5744 const FunctionProtoType *Proto, 5745 unsigned FirstProtoArg, 5746 Expr **Args, unsigned NumArgs, 5747 SmallVector<Expr *, 8> &AllArgs, 5748 VariadicCallType CallType = VariadicDoesNotApply); 5749 5750 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5751 // will warn if the resulting type is not a POD type. 5752 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5753 FunctionDecl *FDecl); 5754 5755 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5756 // operands and then handles various conversions that are common to binary 5757 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5758 // routine returns the first non-arithmetic type found. The client is 5759 // responsible for emitting appropriate error diagnostics. 5760 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5761 bool IsCompAssign = false); 5762 5763 /// AssignConvertType - All of the 'assignment' semantic checks return this 5764 /// enum to indicate whether the assignment was allowed. These checks are 5765 /// done for simple assignments, as well as initialization, return from 5766 /// function, argument passing, etc. The query is phrased in terms of a 5767 /// source and destination type. 5768 enum AssignConvertType { 5769 /// Compatible - the types are compatible according to the standard. 5770 Compatible, 5771 5772 /// PointerToInt - The assignment converts a pointer to an int, which we 5773 /// accept as an extension. 5774 PointerToInt, 5775 5776 /// IntToPointer - The assignment converts an int to a pointer, which we 5777 /// accept as an extension. 5778 IntToPointer, 5779 5780 /// FunctionVoidPointer - The assignment is between a function pointer and 5781 /// void*, which the standard doesn't allow, but we accept as an extension. 5782 FunctionVoidPointer, 5783 5784 /// IncompatiblePointer - The assignment is between two pointers types that 5785 /// are not compatible, but we accept them as an extension. 5786 IncompatiblePointer, 5787 5788 /// IncompatiblePointer - The assignment is between two pointers types which 5789 /// point to integers which have a different sign, but are otherwise 5790 /// identical. This is a subset of the above, but broken out because it's by 5791 /// far the most common case of incompatible pointers. 5792 IncompatiblePointerSign, 5793 5794 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5795 /// c/v/r qualifiers, which we accept as an extension. 5796 CompatiblePointerDiscardsQualifiers, 5797 5798 /// IncompatiblePointerDiscardsQualifiers - The assignment 5799 /// discards qualifiers that we don't permit to be discarded, 5800 /// like address spaces. 5801 IncompatiblePointerDiscardsQualifiers, 5802 5803 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5804 /// nested pointer types, and the qualifiers other than the first two 5805 /// levels differ e.g. char ** -> const char **, but we accept them as an 5806 /// extension. 5807 IncompatibleNestedPointerQualifiers, 5808 5809 /// IncompatibleVectors - The assignment is between two vector types that 5810 /// have the same size, which we accept as an extension. 5811 IncompatibleVectors, 5812 5813 /// IntToBlockPointer - The assignment converts an int to a block 5814 /// pointer. We disallow this. 5815 IntToBlockPointer, 5816 5817 /// IncompatibleBlockPointer - The assignment is between two block 5818 /// pointers types that are not compatible. 5819 IncompatibleBlockPointer, 5820 5821 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5822 /// id type and something else (that is incompatible with it). For example, 5823 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5824 IncompatibleObjCQualifiedId, 5825 5826 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5827 /// object with __weak qualifier. 5828 IncompatibleObjCWeakRef, 5829 5830 /// Incompatible - We reject this conversion outright, it is invalid to 5831 /// represent it in the AST. 5832 Incompatible 5833 }; 5834 5835 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5836 /// assignment conversion type specified by ConvTy. This returns true if the 5837 /// conversion was invalid or false if the conversion was accepted. 5838 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5839 SourceLocation Loc, 5840 QualType DstType, QualType SrcType, 5841 Expr *SrcExpr, AssignmentAction Action, 5842 bool *Complained = 0); 5843 5844 /// CheckAssignmentConstraints - Perform type checking for assignment, 5845 /// argument passing, variable initialization, and function return values. 5846 /// C99 6.5.16. 5847 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5848 QualType LHSType, 5849 QualType RHSType); 5850 5851 /// Check assignment constraints and prepare for a conversion of the 5852 /// RHS to the LHS type. 5853 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5854 ExprResult &RHS, 5855 CastKind &Kind); 5856 5857 // CheckSingleAssignmentConstraints - Currently used by 5858 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5859 // this routine performs the default function/array converions. 5860 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5861 ExprResult &RHS, 5862 bool Diagnose = true); 5863 5864 // \brief If the lhs type is a transparent union, check whether we 5865 // can initialize the transparent union with the given expression. 5866 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5867 ExprResult &RHS); 5868 5869 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5870 5871 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5872 5873 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5874 AssignmentAction Action, 5875 bool AllowExplicit = false); 5876 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5877 AssignmentAction Action, 5878 bool AllowExplicit, 5879 ImplicitConversionSequence& ICS); 5880 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5881 const ImplicitConversionSequence& ICS, 5882 AssignmentAction Action, 5883 CheckedConversionKind CCK 5884 = CCK_ImplicitConversion); 5885 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5886 const StandardConversionSequence& SCS, 5887 AssignmentAction Action, 5888 CheckedConversionKind CCK); 5889 5890 /// the following "Check" methods will return a valid/converted QualType 5891 /// or a null QualType (indicating an error diagnostic was issued). 5892 5893 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5894 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5895 ExprResult &RHS); 5896 QualType CheckPointerToMemberOperands( // C++ 5.5 5897 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5898 SourceLocation OpLoc, bool isIndirect); 5899 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5900 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5901 bool IsDivide); 5902 QualType CheckRemainderOperands( // C99 6.5.5 5903 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5904 bool IsCompAssign = false); 5905 QualType CheckAdditionOperands( // C99 6.5.6 5906 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5907 QualType* CompLHSTy = 0); 5908 QualType CheckSubtractionOperands( // C99 6.5.6 5909 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5910 QualType* CompLHSTy = 0); 5911 QualType CheckShiftOperands( // C99 6.5.7 5912 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5913 bool IsCompAssign = false); 5914 QualType CheckCompareOperands( // C99 6.5.8/9 5915 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5916 bool isRelational); 5917 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5918 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5919 bool IsCompAssign = false); 5920 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5921 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5922 // CheckAssignmentOperands is used for both simple and compound assignment. 5923 // For simple assignment, pass both expressions and a null converted type. 5924 // For compound assignment, pass both expressions and the converted type. 5925 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5926 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5927 5928 ExprResult checkPseudoObjectIncDec(Scope *S, SourceLocation OpLoc, 5929 UnaryOperatorKind Opcode, Expr *Op); 5930 ExprResult checkPseudoObjectAssignment(Scope *S, SourceLocation OpLoc, 5931 BinaryOperatorKind Opcode, 5932 Expr *LHS, Expr *RHS); 5933 ExprResult checkPseudoObjectRValue(Expr *E); 5934 Expr *recreateSyntacticForm(PseudoObjectExpr *E); 5935 5936 QualType CheckConditionalOperands( // C99 6.5.15 5937 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5938 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5939 QualType CXXCheckConditionalOperands( // C++ 5.16 5940 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5941 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5942 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5943 bool *NonStandardCompositeType = 0); 5944 QualType FindCompositePointerType(SourceLocation Loc, 5945 ExprResult &E1, ExprResult &E2, 5946 bool *NonStandardCompositeType = 0) { 5947 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5948 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, 5949 NonStandardCompositeType); 5950 E1 = Owned(E1Tmp); 5951 E2 = Owned(E2Tmp); 5952 return Composite; 5953 } 5954 5955 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5956 SourceLocation QuestionLoc); 5957 5958 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5959 SourceLocation QuestionLoc); 5960 5961 /// type checking for vector binary operators. 5962 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5963 SourceLocation Loc, bool IsCompAssign); 5964 QualType GetSignedVectorType(QualType V); 5965 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5966 SourceLocation Loc, bool isRelational); 5967 QualType CheckVectorLogicalOperands(ExprResult LHS, ExprResult RHS, 5968 SourceLocation Loc); 5969 5970 /// type checking declaration initializers (C99 6.7.8) 5971 bool CheckForConstantInitializer(Expr *e, QualType t); 5972 5973 // type checking C++ declaration initializers (C++ [dcl.init]). 5974 5975 /// ReferenceCompareResult - Expresses the result of comparing two 5976 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5977 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5978 enum ReferenceCompareResult { 5979 /// Ref_Incompatible - The two types are incompatible, so direct 5980 /// reference binding is not possible. 5981 Ref_Incompatible = 0, 5982 /// Ref_Related - The two types are reference-related, which means 5983 /// that their unqualified forms (T1 and T2) are either the same 5984 /// or T1 is a base class of T2. 5985 Ref_Related, 5986 /// Ref_Compatible_With_Added_Qualification - The two types are 5987 /// reference-compatible with added qualification, meaning that 5988 /// they are reference-compatible and the qualifiers on T1 (cv1) 5989 /// are greater than the qualifiers on T2 (cv2). 5990 Ref_Compatible_With_Added_Qualification, 5991 /// Ref_Compatible - The two types are reference-compatible and 5992 /// have equivalent qualifiers (cv1 == cv2). 5993 Ref_Compatible 5994 }; 5995 5996 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5997 QualType T1, QualType T2, 5998 bool &DerivedToBase, 5999 bool &ObjCConversion, 6000 bool &ObjCLifetimeConversion); 6001 6002 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 6003 Expr *CastExpr, CastKind &CastKind, 6004 ExprValueKind &VK, CXXCastPath &Path); 6005 6006 /// \brief Force an expression with unknown-type to an expression of the 6007 /// given type. 6008 ExprResult forceUnknownAnyToType(Expr *E, QualType ToType); 6009 6010 // CheckVectorCast - check type constraints for vectors. 6011 // Since vectors are an extension, there are no C standard reference for this. 6012 // We allow casting between vectors and integer datatypes of the same size. 6013 // returns true if the cast is invalid 6014 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 6015 CastKind &Kind); 6016 6017 // CheckExtVectorCast - check type constraints for extended vectors. 6018 // Since vectors are an extension, there are no C standard reference for this. 6019 // We allow casting between vectors and integer datatypes of the same size, 6020 // or vectors and the element type of that vector. 6021 // returns the cast expr 6022 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 6023 CastKind &Kind); 6024 6025 ExprResult BuildCXXFunctionalCastExpr(TypeSourceInfo *TInfo, 6026 SourceLocation LParenLoc, 6027 Expr *CastExpr, 6028 SourceLocation RParenLoc); 6029 6030 enum ARCConversionResult { ACR_okay, ACR_unbridged }; 6031 6032 /// \brief Checks for invalid conversions and casts between 6033 /// retainable pointers and other pointer kinds. 6034 ARCConversionResult CheckObjCARCConversion(SourceRange castRange, 6035 QualType castType, Expr *&op, 6036 CheckedConversionKind CCK); 6037 6038 Expr *stripARCUnbridgedCast(Expr *e); 6039 void diagnoseARCUnbridgedCast(Expr *e); 6040 6041 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 6042 QualType ExprType); 6043 6044 /// checkRetainCycles - Check whether an Objective-C message send 6045 /// might create an obvious retain cycle. 6046 void checkRetainCycles(ObjCMessageExpr *msg); 6047 void checkRetainCycles(Expr *receiver, Expr *argument); 6048 6049 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 6050 /// to weak/__unsafe_unretained type. 6051 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 6052 6053 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 6054 /// to weak/__unsafe_unretained expression. 6055 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 6056 6057 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 6058 /// \param Method - May be null. 6059 /// \param [out] ReturnType - The return type of the send. 6060 /// \return true iff there were any incompatible types. 6061 bool CheckMessageArgumentTypes(QualType ReceiverType, 6062 Expr **Args, unsigned NumArgs, Selector Sel, 6063 ObjCMethodDecl *Method, bool isClassMessage, 6064 bool isSuperMessage, 6065 SourceLocation lbrac, SourceLocation rbrac, 6066 QualType &ReturnType, ExprValueKind &VK); 6067 6068 /// \brief Determine the result of a message send expression based on 6069 /// the type of the receiver, the method expected to receive the message, 6070 /// and the form of the message send. 6071 QualType getMessageSendResultType(QualType ReceiverType, 6072 ObjCMethodDecl *Method, 6073 bool isClassMessage, bool isSuperMessage); 6074 6075 /// \brief If the given expression involves a message send to a method 6076 /// with a related result type, emit a note describing what happened. 6077 void EmitRelatedResultTypeNote(const Expr *E); 6078 6079 /// CheckBooleanCondition - Diagnose problems involving the use of 6080 /// the given expression as a boolean condition (e.g. in an if 6081 /// statement). Also performs the standard function and array 6082 /// decays, possibly changing the input variable. 6083 /// 6084 /// \param Loc - A location associated with the condition, e.g. the 6085 /// 'if' keyword. 6086 /// \return true iff there were any errors 6087 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 6088 6089 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 6090 Expr *SubExpr); 6091 6092 /// DiagnoseAssignmentAsCondition - Given that an expression is 6093 /// being used as a boolean condition, warn if it's an assignment. 6094 void DiagnoseAssignmentAsCondition(Expr *E); 6095 6096 /// \brief Redundant parentheses over an equality comparison can indicate 6097 /// that the user intended an assignment used as condition. 6098 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 6099 6100 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 6101 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 6102 6103 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 6104 /// the specified width and sign. If an overflow occurs, detect it and emit 6105 /// the specified diagnostic. 6106 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 6107 unsigned NewWidth, bool NewSign, 6108 SourceLocation Loc, unsigned DiagID); 6109 6110 /// Checks that the Objective-C declaration is declared in the global scope. 6111 /// Emits an error and marks the declaration as invalid if it's not declared 6112 /// in the global scope. 6113 bool CheckObjCDeclScope(Decl *D); 6114 6115 /// VerifyIntegerConstantExpression - Verifies that an expression is an ICE, 6116 /// and reports the appropriate diagnostics. Returns false on success. 6117 /// Can optionally return the value of the expression. 6118 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0, 6119 unsigned DiagId = 0, 6120 bool AllowFold = true); 6121 6122 /// VerifyBitField - verifies that a bit field expression is an ICE and has 6123 /// the correct width, and that the field type is valid. 6124 /// Returns false on success. 6125 /// Can optionally return whether the bit-field is of width 0 6126 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 6127 QualType FieldTy, const Expr *BitWidth, 6128 bool *ZeroWidth = 0); 6129 6130 enum CUDAFunctionTarget { 6131 CFT_Device, 6132 CFT_Global, 6133 CFT_Host, 6134 CFT_HostDevice 6135 }; 6136 6137 CUDAFunctionTarget IdentifyCUDATarget(const FunctionDecl *D); 6138 6139 bool CheckCUDATarget(CUDAFunctionTarget CallerTarget, 6140 CUDAFunctionTarget CalleeTarget); 6141 6142 bool CheckCUDATarget(const FunctionDecl *Caller, const FunctionDecl *Callee) { 6143 return CheckCUDATarget(IdentifyCUDATarget(Caller), 6144 IdentifyCUDATarget(Callee)); 6145 } 6146 6147 /// \name Code completion 6148 //@{ 6149 /// \brief Describes the context in which code completion occurs. 6150 enum ParserCompletionContext { 6151 /// \brief Code completion occurs at top-level or namespace context. 6152 PCC_Namespace, 6153 /// \brief Code completion occurs within a class, struct, or union. 6154 PCC_Class, 6155 /// \brief Code completion occurs within an Objective-C interface, protocol, 6156 /// or category. 6157 PCC_ObjCInterface, 6158 /// \brief Code completion occurs within an Objective-C implementation or 6159 /// category implementation 6160 PCC_ObjCImplementation, 6161 /// \brief Code completion occurs within the list of instance variables 6162 /// in an Objective-C interface, protocol, category, or implementation. 6163 PCC_ObjCInstanceVariableList, 6164 /// \brief Code completion occurs following one or more template 6165 /// headers. 6166 PCC_Template, 6167 /// \brief Code completion occurs following one or more template 6168 /// headers within a class. 6169 PCC_MemberTemplate, 6170 /// \brief Code completion occurs within an expression. 6171 PCC_Expression, 6172 /// \brief Code completion occurs within a statement, which may 6173 /// also be an expression or a declaration. 6174 PCC_Statement, 6175 /// \brief Code completion occurs at the beginning of the 6176 /// initialization statement (or expression) in a for loop. 6177 PCC_ForInit, 6178 /// \brief Code completion occurs within the condition of an if, 6179 /// while, switch, or for statement. 6180 PCC_Condition, 6181 /// \brief Code completion occurs within the body of a function on a 6182 /// recovery path, where we do not have a specific handle on our position 6183 /// in the grammar. 6184 PCC_RecoveryInFunction, 6185 /// \brief Code completion occurs where only a type is permitted. 6186 PCC_Type, 6187 /// \brief Code completion occurs in a parenthesized expression, which 6188 /// might also be a type cast. 6189 PCC_ParenthesizedExpression, 6190 /// \brief Code completion occurs within a sequence of declaration 6191 /// specifiers within a function, method, or block. 6192 PCC_LocalDeclarationSpecifiers 6193 }; 6194 6195 void CodeCompleteOrdinaryName(Scope *S, 6196 ParserCompletionContext CompletionContext); 6197 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 6198 bool AllowNonIdentifiers, 6199 bool AllowNestedNameSpecifiers); 6200 6201 struct CodeCompleteExpressionData; 6202 void CodeCompleteExpression(Scope *S, 6203 const CodeCompleteExpressionData &Data); 6204 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 6205 SourceLocation OpLoc, 6206 bool IsArrow); 6207 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 6208 void CodeCompleteTag(Scope *S, unsigned TagSpec); 6209 void CodeCompleteTypeQualifiers(DeclSpec &DS); 6210 void CodeCompleteCase(Scope *S); 6211 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 6212 void CodeCompleteInitializer(Scope *S, Decl *D); 6213 void CodeCompleteReturn(Scope *S); 6214 void CodeCompleteAfterIf(Scope *S); 6215 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 6216 6217 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 6218 bool EnteringContext); 6219 void CodeCompleteUsing(Scope *S); 6220 void CodeCompleteUsingDirective(Scope *S); 6221 void CodeCompleteNamespaceDecl(Scope *S); 6222 void CodeCompleteNamespaceAliasDecl(Scope *S); 6223 void CodeCompleteOperatorName(Scope *S); 6224 void CodeCompleteConstructorInitializer(Decl *Constructor, 6225 CXXCtorInitializer** Initializers, 6226 unsigned NumInitializers); 6227 6228 void CodeCompleteObjCAtDirective(Scope *S); 6229 void CodeCompleteObjCAtVisibility(Scope *S); 6230 void CodeCompleteObjCAtStatement(Scope *S); 6231 void CodeCompleteObjCAtExpression(Scope *S); 6232 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 6233 void CodeCompleteObjCPropertyGetter(Scope *S); 6234 void CodeCompleteObjCPropertySetter(Scope *S); 6235 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 6236 bool IsParameter); 6237 void CodeCompleteObjCMessageReceiver(Scope *S); 6238 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 6239 IdentifierInfo **SelIdents, 6240 unsigned NumSelIdents, 6241 bool AtArgumentExpression); 6242 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 6243 IdentifierInfo **SelIdents, 6244 unsigned NumSelIdents, 6245 bool AtArgumentExpression, 6246 bool IsSuper = false); 6247 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 6248 IdentifierInfo **SelIdents, 6249 unsigned NumSelIdents, 6250 bool AtArgumentExpression, 6251 ObjCInterfaceDecl *Super = 0); 6252 void CodeCompleteObjCForCollection(Scope *S, 6253 DeclGroupPtrTy IterationVar); 6254 void CodeCompleteObjCSelector(Scope *S, 6255 IdentifierInfo **SelIdents, 6256 unsigned NumSelIdents); 6257 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 6258 unsigned NumProtocols); 6259 void CodeCompleteObjCProtocolDecl(Scope *S); 6260 void CodeCompleteObjCInterfaceDecl(Scope *S); 6261 void CodeCompleteObjCSuperclass(Scope *S, 6262 IdentifierInfo *ClassName, 6263 SourceLocation ClassNameLoc); 6264 void CodeCompleteObjCImplementationDecl(Scope *S); 6265 void CodeCompleteObjCInterfaceCategory(Scope *S, 6266 IdentifierInfo *ClassName, 6267 SourceLocation ClassNameLoc); 6268 void CodeCompleteObjCImplementationCategory(Scope *S, 6269 IdentifierInfo *ClassName, 6270 SourceLocation ClassNameLoc); 6271 void CodeCompleteObjCPropertyDefinition(Scope *S); 6272 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 6273 IdentifierInfo *PropertyName); 6274 void CodeCompleteObjCMethodDecl(Scope *S, 6275 bool IsInstanceMethod, 6276 ParsedType ReturnType); 6277 void CodeCompleteObjCMethodDeclSelector(Scope *S, 6278 bool IsInstanceMethod, 6279 bool AtParameterName, 6280 ParsedType ReturnType, 6281 IdentifierInfo **SelIdents, 6282 unsigned NumSelIdents); 6283 void CodeCompletePreprocessorDirective(bool InConditional); 6284 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 6285 void CodeCompletePreprocessorMacroName(bool IsDefinition); 6286 void CodeCompletePreprocessorExpression(); 6287 void CodeCompletePreprocessorMacroArgument(Scope *S, 6288 IdentifierInfo *Macro, 6289 MacroInfo *MacroInfo, 6290 unsigned Argument); 6291 void CodeCompleteNaturalLanguage(); 6292 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 6293 SmallVectorImpl<CodeCompletionResult> &Results); 6294 //@} 6295 6296 //===--------------------------------------------------------------------===// 6297 // Extra semantic analysis beyond the C type system 6298 6299public: 6300 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 6301 unsigned ByteNo) const; 6302 6303private: 6304 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6305 const ArraySubscriptExpr *ASE=0, 6306 bool AllowOnePastEnd=true, bool IndexNegated=false); 6307 void CheckArrayAccess(const Expr *E); 6308 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6309 bool CheckObjCMethodCall(ObjCMethodDecl *Method, SourceLocation loc, 6310 Expr **Args, unsigned NumArgs); 6311 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6312 6313 bool CheckablePrintfAttr(const FormatAttr *Format, Expr **Args, 6314 unsigned NumArgs, bool IsCXXMemberCall); 6315 bool CheckObjCString(Expr *Arg); 6316 6317 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6318 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6319 6320 bool SemaBuiltinVAStart(CallExpr *TheCall); 6321 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6322 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6323 6324public: 6325 // Used by C++ template instantiation. 6326 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6327 6328private: 6329 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6330 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6331 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6332 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6333 ExprResult SemaAtomicOpsOverloaded(ExprResult TheCallResult, 6334 AtomicExpr::AtomicOp Op); 6335 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6336 llvm::APSInt &Result); 6337 6338 bool SemaCheckStringLiteral(const Expr *E, Expr **Args, unsigned NumArgs, 6339 bool HasVAListArg, unsigned format_idx, 6340 unsigned firstDataArg, bool isPrintf, 6341 bool inFunctionCall = true); 6342 6343 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6344 Expr **Args, unsigned NumArgs, bool HasVAListArg, 6345 unsigned format_idx, unsigned firstDataArg, 6346 bool isPrintf, bool inFunctionCall); 6347 6348 void CheckNonNullArguments(const NonNullAttr *NonNull, 6349 const Expr * const *ExprArgs, 6350 SourceLocation CallSiteLoc); 6351 6352 void CheckFormatArguments(const FormatAttr *Format, CallExpr *TheCall); 6353 void CheckFormatArguments(const FormatAttr *Format, Expr **Args, 6354 unsigned NumArgs, bool IsCXXMember, 6355 SourceLocation Loc, SourceRange Range); 6356 void CheckPrintfScanfArguments(Expr **Args, unsigned NumArgs, 6357 bool HasVAListArg, unsigned format_idx, 6358 unsigned firstDataArg, bool isPrintf, 6359 SourceLocation Loc, SourceRange range); 6360 6361 void CheckMemaccessArguments(const CallExpr *Call, 6362 unsigned BId, 6363 IdentifierInfo *FnName); 6364 6365 void CheckStrlcpycatArguments(const CallExpr *Call, 6366 IdentifierInfo *FnName); 6367 6368 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6369 SourceLocation ReturnLoc); 6370 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6371 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6372 6373 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6374 Expr *Init); 6375 6376 /// \brief The parser's current scope. 6377 /// 6378 /// The parser maintains this state here. 6379 Scope *CurScope; 6380 6381protected: 6382 friend class Parser; 6383 friend class InitializationSequence; 6384 friend class ASTReader; 6385 friend class ASTWriter; 6386 6387public: 6388 /// \brief Retrieve the parser's current scope. 6389 /// 6390 /// This routine must only be used when it is certain that semantic analysis 6391 /// and the parser are in precisely the same context, which is not the case 6392 /// when, e.g., we are performing any kind of template instantiation. 6393 /// Therefore, the only safe places to use this scope are in the parser 6394 /// itself and in routines directly invoked from the parser and *never* from 6395 /// template substitution or instantiation. 6396 Scope *getCurScope() const { return CurScope; } 6397 6398 Decl *getObjCDeclContext() const; 6399 6400 DeclContext *getCurLexicalContext() const { 6401 return OriginalLexicalContext ? OriginalLexicalContext : CurContext; 6402 } 6403 6404 AvailabilityResult getCurContextAvailability() const; 6405}; 6406 6407/// \brief RAII object that enters a new expression evaluation context. 6408class EnterExpressionEvaluationContext { 6409 Sema &Actions; 6410 6411public: 6412 EnterExpressionEvaluationContext(Sema &Actions, 6413 Sema::ExpressionEvaluationContext NewContext) 6414 : Actions(Actions) { 6415 Actions.PushExpressionEvaluationContext(NewContext); 6416 } 6417 6418 ~EnterExpressionEvaluationContext() { 6419 Actions.PopExpressionEvaluationContext(); 6420 } 6421}; 6422 6423} // end namespace clang 6424 6425#endif 6426