Sema.h revision 1d4e8e9340c9699069a33a74562e883a305f7607
1//===--- Sema.h - Semantic Analysis & AST Building --------------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file defines the Sema class, which performs semantic analysis and 11// builds ASTs. 12// 13//===----------------------------------------------------------------------===// 14 15#ifndef LLVM_CLANG_SEMA_SEMA_H 16#define LLVM_CLANG_SEMA_SEMA_H 17 18#include "clang/Sema/Ownership.h" 19#include "clang/Sema/AnalysisBasedWarnings.h" 20#include "clang/Sema/IdentifierResolver.h" 21#include "clang/Sema/ObjCMethodList.h" 22#include "clang/Sema/DeclSpec.h" 23#include "clang/Sema/ExternalSemaSource.h" 24#include "clang/Sema/LocInfoType.h" 25#include "clang/Sema/TypoCorrection.h" 26#include "clang/Sema/Weak.h" 27#include "clang/AST/Expr.h" 28#include "clang/AST/DeclarationName.h" 29#include "clang/AST/ExternalASTSource.h" 30#include "clang/AST/TypeLoc.h" 31#include "clang/Basic/Specifiers.h" 32#include "clang/Basic/TemplateKinds.h" 33#include "clang/Basic/TypeTraits.h" 34#include "clang/Basic/ExpressionTraits.h" 35#include "llvm/ADT/OwningPtr.h" 36#include "llvm/ADT/SmallPtrSet.h" 37#include "llvm/ADT/SmallVector.h" 38#include <deque> 39#include <string> 40 41namespace llvm { 42 class APSInt; 43 template <typename ValueT> struct DenseMapInfo; 44 template <typename ValueT, typename ValueInfoT> class DenseSet; 45} 46 47namespace clang { 48 class ADLResult; 49 class ASTConsumer; 50 class ASTContext; 51 class ASTMutationListener; 52 class ASTReader; 53 class ASTWriter; 54 class ArrayType; 55 class AttributeList; 56 class BlockDecl; 57 class CXXBasePath; 58 class CXXBasePaths; 59 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 60 class CXXConstructorDecl; 61 class CXXConversionDecl; 62 class CXXDestructorDecl; 63 class CXXFieldCollector; 64 class CXXMemberCallExpr; 65 class CXXMethodDecl; 66 class CXXScopeSpec; 67 class CXXTemporary; 68 class CXXTryStmt; 69 class CallExpr; 70 class ClassTemplateDecl; 71 class ClassTemplatePartialSpecializationDecl; 72 class ClassTemplateSpecializationDecl; 73 class CodeCompleteConsumer; 74 class CodeCompletionAllocator; 75 class CodeCompletionResult; 76 class Decl; 77 class DeclAccessPair; 78 class DeclContext; 79 class DeclRefExpr; 80 class DeclaratorDecl; 81 class DeducedTemplateArgument; 82 class DependentDiagnostic; 83 class DesignatedInitExpr; 84 class Designation; 85 class EnumConstantDecl; 86 class Expr; 87 class ExtVectorType; 88 class ExternalSemaSource; 89 class FormatAttr; 90 class FriendDecl; 91 class FunctionDecl; 92 class FunctionProtoType; 93 class FunctionTemplateDecl; 94 class ImplicitConversionSequence; 95 class InitListExpr; 96 class InitializationKind; 97 class InitializationSequence; 98 class InitializedEntity; 99 class IntegerLiteral; 100 class LabelStmt; 101 class LangOptions; 102 class LocalInstantiationScope; 103 class LookupResult; 104 class MacroInfo; 105 class MultiLevelTemplateArgumentList; 106 class NamedDecl; 107 class NonNullAttr; 108 class ObjCCategoryDecl; 109 class ObjCCategoryImplDecl; 110 class ObjCCompatibleAliasDecl; 111 class ObjCContainerDecl; 112 class ObjCImplDecl; 113 class ObjCImplementationDecl; 114 class ObjCInterfaceDecl; 115 class ObjCIvarDecl; 116 template <class T> class ObjCList; 117 class ObjCMessageExpr; 118 class ObjCMethodDecl; 119 class ObjCPropertyDecl; 120 class ObjCProtocolDecl; 121 class OverloadCandidateSet; 122 class OverloadExpr; 123 class ParenListExpr; 124 class ParmVarDecl; 125 class Preprocessor; 126 class PseudoDestructorTypeStorage; 127 class QualType; 128 class StandardConversionSequence; 129 class Stmt; 130 class StringLiteral; 131 class SwitchStmt; 132 class TargetAttributesSema; 133 class TemplateArgument; 134 class TemplateArgumentList; 135 class TemplateArgumentLoc; 136 class TemplateDecl; 137 class TemplateParameterList; 138 class TemplatePartialOrderingContext; 139 class TemplateTemplateParmDecl; 140 class Token; 141 class TypeAliasDecl; 142 class TypedefDecl; 143 class TypedefNameDecl; 144 class TypeLoc; 145 class UnqualifiedId; 146 class UnresolvedLookupExpr; 147 class UnresolvedMemberExpr; 148 class UnresolvedSetImpl; 149 class UnresolvedSetIterator; 150 class UsingDecl; 151 class UsingShadowDecl; 152 class ValueDecl; 153 class VarDecl; 154 class VisibilityAttr; 155 class VisibleDeclConsumer; 156 class IndirectFieldDecl; 157 158namespace sema { 159 class AccessedEntity; 160 class BlockScopeInfo; 161 class DelayedDiagnostic; 162 class FunctionScopeInfo; 163 class TemplateDeductionInfo; 164} 165 166// FIXME: No way to easily map from TemplateTypeParmTypes to 167// TemplateTypeParmDecls, so we have this horrible PointerUnion. 168typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 169 SourceLocation> UnexpandedParameterPack; 170 171/// Sema - This implements semantic analysis and AST building for C. 172class Sema { 173 Sema(const Sema&); // DO NOT IMPLEMENT 174 void operator=(const Sema&); // DO NOT IMPLEMENT 175 mutable const TargetAttributesSema* TheTargetAttributesSema; 176public: 177 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 178 typedef OpaquePtr<TemplateName> TemplateTy; 179 typedef OpaquePtr<QualType> TypeTy; 180 181 OpenCLOptions OpenCLFeatures; 182 FPOptions FPFeatures; 183 184 const LangOptions &LangOpts; 185 Preprocessor &PP; 186 ASTContext &Context; 187 ASTConsumer &Consumer; 188 Diagnostic &Diags; 189 SourceManager &SourceMgr; 190 191 /// \brief Flag indicating whether or not to collect detailed statistics. 192 bool CollectStats; 193 194 /// \brief Source of additional semantic information. 195 ExternalSemaSource *ExternalSource; 196 197 /// \brief Code-completion consumer. 198 CodeCompleteConsumer *CodeCompleter; 199 200 /// CurContext - This is the current declaration context of parsing. 201 DeclContext *CurContext; 202 203 /// VAListTagName - The declaration name corresponding to __va_list_tag. 204 /// This is used as part of a hack to omit that class from ADL results. 205 DeclarationName VAListTagName; 206 207 /// PackContext - Manages the stack for #pragma pack. An alignment 208 /// of 0 indicates default alignment. 209 void *PackContext; // Really a "PragmaPackStack*" 210 211 bool MSStructPragmaOn; // True when #pragma ms_struct on 212 213 /// VisContext - Manages the stack for #pragma GCC visibility. 214 void *VisContext; // Really a "PragmaVisStack*" 215 216 /// ExprNeedsCleanups - True if the current evaluation context 217 /// requires cleanups to be run at its conclusion. 218 bool ExprNeedsCleanups; 219 220 /// \brief Stack containing information about each of the nested 221 /// function, block, and method scopes that are currently active. 222 /// 223 /// This array is never empty. Clients should ignore the first 224 /// element, which is used to cache a single FunctionScopeInfo 225 /// that's used to parse every top-level function. 226 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 227 228 /// ExprTemporaries - This is the stack of temporaries that are created by 229 /// the current full expression. 230 SmallVector<CXXTemporary*, 8> ExprTemporaries; 231 232 typedef LazyVector<TypedefNameDecl *, ExternalSemaSource, 233 &ExternalSemaSource::ReadExtVectorDecls, 2, 2> 234 ExtVectorDeclsType; 235 236 /// ExtVectorDecls - This is a list all the extended vector types. This allows 237 /// us to associate a raw vector type with one of the ext_vector type names. 238 /// This is only necessary for issuing pretty diagnostics. 239 ExtVectorDeclsType ExtVectorDecls; 240 241 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 242 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 243 244 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 245 246 /// PureVirtualClassDiagSet - a set of class declarations which we have 247 /// emitted a list of pure virtual functions. Used to prevent emitting the 248 /// same list more than once. 249 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 250 251 /// ParsingInitForAutoVars - a set of declarations with auto types for which 252 /// we are currently parsing the initializer. 253 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 254 255 /// \brief A mapping from external names to the most recent 256 /// locally-scoped external declaration with that name. 257 /// 258 /// This map contains external declarations introduced in local 259 /// scoped, e.g., 260 /// 261 /// \code 262 /// void f() { 263 /// void foo(int, int); 264 /// } 265 /// \endcode 266 /// 267 /// Here, the name "foo" will be associated with the declaration on 268 /// "foo" within f. This name is not visible outside of 269 /// "f". However, we still find it in two cases: 270 /// 271 /// - If we are declaring another external with the name "foo", we 272 /// can find "foo" as a previous declaration, so that the types 273 /// of this external declaration can be checked for 274 /// compatibility. 275 /// 276 /// - If we would implicitly declare "foo" (e.g., due to a call to 277 /// "foo" in C when no prototype or definition is visible), then 278 /// we find this declaration of "foo" and complain that it is 279 /// not visible. 280 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 281 282 /// \brief Look for a locally scoped external declaration by the given name. 283 llvm::DenseMap<DeclarationName, NamedDecl *>::iterator 284 findLocallyScopedExternalDecl(DeclarationName Name); 285 286 typedef LazyVector<VarDecl *, ExternalSemaSource, 287 &ExternalSemaSource::ReadTentativeDefinitions, 2, 2> 288 TentativeDefinitionsType; 289 290 /// \brief All the tentative definitions encountered in the TU. 291 TentativeDefinitionsType TentativeDefinitions; 292 293 typedef LazyVector<const DeclaratorDecl *, ExternalSemaSource, 294 &ExternalSemaSource::ReadUnusedFileScopedDecls, 2, 2> 295 UnusedFileScopedDeclsType; 296 297 /// \brief The set of file scoped decls seen so far that have not been used 298 /// and must warn if not used. Only contains the first declaration. 299 UnusedFileScopedDeclsType UnusedFileScopedDecls; 300 301 typedef LazyVector<CXXConstructorDecl *, ExternalSemaSource, 302 &ExternalSemaSource::ReadDelegatingConstructors, 2, 2> 303 DelegatingCtorDeclsType; 304 305 /// \brief All the delegating constructors seen so far in the file, used for 306 /// cycle detection at the end of the TU. 307 DelegatingCtorDeclsType DelegatingCtorDecls; 308 309 /// \brief All the overriding destructors seen during a class definition 310 /// (there could be multiple due to nested classes) that had their exception 311 /// spec checks delayed, plus the overridden destructor. 312 SmallVector<std::pair<const CXXDestructorDecl*, 313 const CXXDestructorDecl*>, 2> 314 DelayedDestructorExceptionSpecChecks; 315 316 /// \brief Callback to the parser to parse templated functions when needed. 317 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 318 LateTemplateParserCB *LateTemplateParser; 319 void *OpaqueParser; 320 321 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 322 LateTemplateParser = LTP; 323 OpaqueParser = P; 324 } 325 326 class DelayedDiagnostics; 327 328 class ParsingDeclState { 329 unsigned SavedStackSize; 330 friend class Sema::DelayedDiagnostics; 331 }; 332 333 class ProcessingContextState { 334 unsigned SavedParsingDepth; 335 unsigned SavedActiveStackBase; 336 friend class Sema::DelayedDiagnostics; 337 }; 338 339 /// A class which encapsulates the logic for delaying diagnostics 340 /// during parsing and other processing. 341 class DelayedDiagnostics { 342 /// \brief The stack of diagnostics that were delayed due to being 343 /// produced during the parsing of a declaration. 344 sema::DelayedDiagnostic *Stack; 345 346 /// \brief The number of objects on the delayed-diagnostics stack. 347 unsigned StackSize; 348 349 /// \brief The current capacity of the delayed-diagnostics stack. 350 unsigned StackCapacity; 351 352 /// \brief The index of the first "active" delayed diagnostic in 353 /// the stack. When parsing class definitions, we ignore active 354 /// delayed diagnostics from the surrounding context. 355 unsigned ActiveStackBase; 356 357 /// \brief The depth of the declarations we're currently parsing. 358 /// This gets saved and reset whenever we enter a class definition. 359 unsigned ParsingDepth; 360 361 public: 362 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 363 ActiveStackBase(0), ParsingDepth(0) {} 364 365 ~DelayedDiagnostics() { 366 delete[] reinterpret_cast<char*>(Stack); 367 } 368 369 /// Adds a delayed diagnostic. 370 void add(const sema::DelayedDiagnostic &diag); 371 372 /// Determines whether diagnostics should be delayed. 373 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 374 375 /// Observe that we've started parsing a declaration. Access and 376 /// deprecation diagnostics will be delayed; when the declaration 377 /// is completed, all active delayed diagnostics will be evaluated 378 /// in its context, and then active diagnostics stack will be 379 /// popped down to the saved depth. 380 ParsingDeclState pushParsingDecl() { 381 ParsingDepth++; 382 383 ParsingDeclState state; 384 state.SavedStackSize = StackSize; 385 return state; 386 } 387 388 /// Observe that we're completed parsing a declaration. 389 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 390 391 /// Observe that we've started processing a different context, the 392 /// contents of which are semantically separate from the 393 /// declarations it may lexically appear in. This sets aside the 394 /// current stack of active diagnostics and starts afresh. 395 ProcessingContextState pushContext() { 396 assert(StackSize >= ActiveStackBase); 397 398 ProcessingContextState state; 399 state.SavedParsingDepth = ParsingDepth; 400 state.SavedActiveStackBase = ActiveStackBase; 401 402 ActiveStackBase = StackSize; 403 ParsingDepth = 0; 404 405 return state; 406 } 407 408 /// Observe that we've stopped processing a context. This 409 /// restores the previous stack of active diagnostics. 410 void popContext(ProcessingContextState state) { 411 assert(ActiveStackBase == StackSize); 412 assert(ParsingDepth == 0); 413 ActiveStackBase = state.SavedActiveStackBase; 414 ParsingDepth = state.SavedParsingDepth; 415 } 416 } DelayedDiagnostics; 417 418 /// A RAII object to temporarily push a declaration context. 419 class ContextRAII { 420 private: 421 Sema &S; 422 DeclContext *SavedContext; 423 ProcessingContextState SavedContextState; 424 425 public: 426 ContextRAII(Sema &S, DeclContext *ContextToPush) 427 : S(S), SavedContext(S.CurContext), 428 SavedContextState(S.DelayedDiagnostics.pushContext()) 429 { 430 assert(ContextToPush && "pushing null context"); 431 S.CurContext = ContextToPush; 432 } 433 434 void pop() { 435 if (!SavedContext) return; 436 S.CurContext = SavedContext; 437 S.DelayedDiagnostics.popContext(SavedContextState); 438 SavedContext = 0; 439 } 440 441 ~ContextRAII() { 442 pop(); 443 } 444 }; 445 446 /// WeakUndeclaredIdentifiers - Identifiers contained in 447 /// #pragma weak before declared. rare. may alias another 448 /// identifier, declared or undeclared 449 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 450 451 /// \brief Load weak undeclared identifiers from the external source. 452 void LoadExternalWeakUndeclaredIdentifiers(); 453 454 /// WeakTopLevelDecl - Translation-unit scoped declarations generated by 455 /// #pragma weak during processing of other Decls. 456 /// I couldn't figure out a clean way to generate these in-line, so 457 /// we store them here and handle separately -- which is a hack. 458 /// It would be best to refactor this. 459 SmallVector<Decl*,2> WeakTopLevelDecl; 460 461 IdentifierResolver IdResolver; 462 463 /// Translation Unit Scope - useful to Objective-C actions that need 464 /// to lookup file scope declarations in the "ordinary" C decl namespace. 465 /// For example, user-defined classes, built-in "id" type, etc. 466 Scope *TUScope; 467 468 /// \brief The C++ "std" namespace, where the standard library resides. 469 LazyDeclPtr StdNamespace; 470 471 /// \brief The C++ "std::bad_alloc" class, which is defined by the C++ 472 /// standard library. 473 LazyDeclPtr StdBadAlloc; 474 475 /// \brief The C++ "type_info" declaration, which is defined in <typeinfo>. 476 RecordDecl *CXXTypeInfoDecl; 477 478 /// \brief The MSVC "_GUID" struct, which is defined in MSVC header files. 479 RecordDecl *MSVCGuidDecl; 480 481 /// A flag to remember whether the implicit forms of operator new and delete 482 /// have been declared. 483 bool GlobalNewDeleteDeclared; 484 485 486 /// A flag that is set when parsing a -dealloc method and no [super dealloc] 487 /// call was found yet. 488 bool ObjCShouldCallSuperDealloc; 489 /// A flag that is set when parsing a -finalize method and no [super finalize] 490 /// call was found yet. 491 bool ObjCShouldCallSuperFinalize; 492 493 /// \brief The set of declarations that have been referenced within 494 /// a potentially evaluated expression. 495 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 496 PotentiallyReferencedDecls; 497 498 /// \brief A set of diagnostics that may be emitted. 499 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 500 PotentiallyEmittedDiagnostics; 501 502 /// \brief Describes how the expressions currently being parsed are 503 /// evaluated at run-time, if at all. 504 enum ExpressionEvaluationContext { 505 /// \brief The current expression and its subexpressions occur within an 506 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 507 /// or the subexpression of \c sizeof, where the type or the value of the 508 /// expression may be significant but no code will be generated to evaluate 509 /// the value of the expression at run time. 510 Unevaluated, 511 512 /// \brief The current expression is potentially evaluated at run time, 513 /// which means that code may be generated to evaluate the value of the 514 /// expression at run time. 515 PotentiallyEvaluated, 516 517 /// \brief The current expression may be potentially evaluated or it may 518 /// be unevaluated, but it is impossible to tell from the lexical context. 519 /// This evaluation context is used primary for the operand of the C++ 520 /// \c typeid expression, whose argument is potentially evaluated only when 521 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 522 PotentiallyPotentiallyEvaluated, 523 524 /// \brief The current expression is potentially evaluated, but any 525 /// declarations referenced inside that expression are only used if 526 /// in fact the current expression is used. 527 /// 528 /// This value is used when parsing default function arguments, for which 529 /// we would like to provide diagnostics (e.g., passing non-POD arguments 530 /// through varargs) but do not want to mark declarations as "referenced" 531 /// until the default argument is used. 532 PotentiallyEvaluatedIfUsed 533 }; 534 535 /// \brief Data structure used to record current or nested 536 /// expression evaluation contexts. 537 struct ExpressionEvaluationContextRecord { 538 /// \brief The expression evaluation context. 539 ExpressionEvaluationContext Context; 540 541 /// \brief Whether the enclosing context needed a cleanup. 542 bool ParentNeedsCleanups; 543 544 /// \brief The number of temporaries that were active when we 545 /// entered this expression evaluation context. 546 unsigned NumTemporaries; 547 548 /// \brief The set of declarations referenced within a 549 /// potentially potentially-evaluated context. 550 /// 551 /// When leaving a potentially potentially-evaluated context, each 552 /// of these elements will be as referenced if the corresponding 553 /// potentially potentially evaluated expression is potentially 554 /// evaluated. 555 PotentiallyReferencedDecls *PotentiallyReferenced; 556 557 /// \brief The set of diagnostics to emit should this potentially 558 /// potentially-evaluated context become evaluated. 559 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 560 561 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 562 unsigned NumTemporaries, 563 bool ParentNeedsCleanups) 564 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 565 NumTemporaries(NumTemporaries), 566 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 567 568 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 569 if (!PotentiallyReferenced) 570 PotentiallyReferenced = new PotentiallyReferencedDecls; 571 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 572 } 573 574 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 575 if (!PotentiallyDiagnosed) 576 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 577 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 578 } 579 580 void Destroy() { 581 delete PotentiallyReferenced; 582 delete PotentiallyDiagnosed; 583 PotentiallyReferenced = 0; 584 PotentiallyDiagnosed = 0; 585 } 586 }; 587 588 /// A stack of expression evaluation contexts. 589 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 590 591 /// SpecialMemberOverloadResult - The overloading result for a special member 592 /// function. 593 /// 594 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 595 /// integer is used to determine whether we have a parameter qualification 596 /// match, the second-lowest is whether we had success in resolving the 597 /// overload to a unique non-deleted function. 598 /// 599 /// The ConstParamMatch bit represents whether, when looking up a copy 600 /// constructor or assignment operator, we found a potential copy 601 /// constructor/assignment operator whose first parameter is const-qualified. 602 /// This is used for determining parameter types of other objects and is 603 /// utterly meaningless on other types of special members. 604 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 605 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 606 public: 607 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 608 : FastFoldingSetNode(ID) 609 {} 610 611 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 612 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 613 614 bool hasSuccess() const { return Pair.getInt() & 0x1; } 615 void setSuccess(bool B) { 616 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 617 } 618 619 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 620 void setConstParamMatch(bool B) { 621 Pair.setInt(B << 1 | unsigned(hasSuccess())); 622 } 623 }; 624 625 /// \brief A cache of special member function overload resolution results 626 /// for C++ records. 627 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 628 629 /// \brief The kind of translation unit we are processing. 630 /// 631 /// When we're processing a complete translation unit, Sema will perform 632 /// end-of-translation-unit semantic tasks (such as creating 633 /// initializers for tentative definitions in C) once parsing has 634 /// completed. Modules and precompiled headers perform different kinds of 635 /// checks. 636 TranslationUnitKind TUKind; 637 638 llvm::BumpPtrAllocator BumpAlloc; 639 640 /// \brief The number of SFINAE diagnostics that have been trapped. 641 unsigned NumSFINAEErrors; 642 643 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 644 UnparsedDefaultArgInstantiationsMap; 645 646 /// \brief A mapping from parameters with unparsed default arguments to the 647 /// set of instantiations of each parameter. 648 /// 649 /// This mapping is a temporary data structure used when parsing 650 /// nested class templates or nested classes of class templates, 651 /// where we might end up instantiating an inner class before the 652 /// default arguments of its methods have been parsed. 653 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 654 655 // Contains the locations of the beginning of unparsed default 656 // argument locations. 657 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 658 659 /// UndefinedInternals - all the used, undefined objects with 660 /// internal linkage in this translation unit. 661 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 662 663 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 664 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 665 666 /// Method Pool - allows efficient lookup when typechecking messages to "id". 667 /// We need to maintain a list, since selectors can have differing signatures 668 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 669 /// of selectors are "overloaded"). 670 GlobalMethodPool MethodPool; 671 672 /// Method selectors used in a @selector expression. Used for implementation 673 /// of -Wselector. 674 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 675 676 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 677 678 /// Private Helper predicate to check for 'self'. Upon success, it 679 /// returns method declaration where 'self' is referenced. 680 const ObjCMethodDecl *GetMethodIfSelfExpr(Expr *RExpr); 681public: 682 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 683 TranslationUnitKind TUKind = TU_Complete, 684 CodeCompleteConsumer *CompletionConsumer = 0); 685 ~Sema(); 686 687 /// \brief Perform initialization that occurs after the parser has been 688 /// initialized but before it parses anything. 689 void Initialize(); 690 691 const LangOptions &getLangOptions() const { return LangOpts; } 692 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 693 FPOptions &getFPOptions() { return FPFeatures; } 694 695 Diagnostic &getDiagnostics() const { return Diags; } 696 SourceManager &getSourceManager() const { return SourceMgr; } 697 const TargetAttributesSema &getTargetAttributesSema() const; 698 Preprocessor &getPreprocessor() const { return PP; } 699 ASTContext &getASTContext() const { return Context; } 700 ASTConsumer &getASTConsumer() const { return Consumer; } 701 ASTMutationListener *getASTMutationListener() const; 702 703 void PrintStats() const; 704 705 /// \brief Helper class that creates diagnostics with optional 706 /// template instantiation stacks. 707 /// 708 /// This class provides a wrapper around the basic DiagnosticBuilder 709 /// class that emits diagnostics. SemaDiagnosticBuilder is 710 /// responsible for emitting the diagnostic (as DiagnosticBuilder 711 /// does) and, if the diagnostic comes from inside a template 712 /// instantiation, printing the template instantiation stack as 713 /// well. 714 class SemaDiagnosticBuilder : public DiagnosticBuilder { 715 Sema &SemaRef; 716 unsigned DiagID; 717 718 public: 719 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 720 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 721 722 explicit SemaDiagnosticBuilder(Sema &SemaRef) 723 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 724 725 ~SemaDiagnosticBuilder(); 726 }; 727 728 /// \brief Emit a diagnostic. 729 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 730 731 /// \brief Emit a partial diagnostic. 732 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 733 734 /// \brief Build a partial diagnostic. 735 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 736 737 bool findMacroSpelling(SourceLocation &loc, StringRef name); 738 739 ExprResult Owned(Expr* E) { return E; } 740 ExprResult Owned(ExprResult R) { return R; } 741 StmtResult Owned(Stmt* S) { return S; } 742 743 void ActOnEndOfTranslationUnit(); 744 745 void CheckDelegatingCtorCycles(); 746 747 Scope *getScopeForContext(DeclContext *Ctx); 748 749 void PushFunctionScope(); 750 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 751 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 752 const Decl *D = 0, const BlockExpr *blkExpr = 0); 753 754 sema::FunctionScopeInfo *getCurFunction() const { 755 return FunctionScopes.back(); 756 } 757 758 bool hasAnyUnrecoverableErrorsInThisFunction() const; 759 760 /// \brief Retrieve the current block, if any. 761 sema::BlockScopeInfo *getCurBlock(); 762 763 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 764 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 765 766 //===--------------------------------------------------------------------===// 767 // Type Analysis / Processing: SemaType.cpp. 768 // 769 770 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 771 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 772 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 773 } 774 QualType BuildPointerType(QualType T, 775 SourceLocation Loc, DeclarationName Entity); 776 QualType BuildReferenceType(QualType T, bool LValueRef, 777 SourceLocation Loc, DeclarationName Entity); 778 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 779 Expr *ArraySize, unsigned Quals, 780 SourceRange Brackets, DeclarationName Entity); 781 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 782 SourceLocation AttrLoc); 783 QualType BuildFunctionType(QualType T, 784 QualType *ParamTypes, unsigned NumParamTypes, 785 bool Variadic, unsigned Quals, 786 RefQualifierKind RefQualifier, 787 SourceLocation Loc, DeclarationName Entity, 788 FunctionType::ExtInfo Info); 789 QualType BuildMemberPointerType(QualType T, QualType Class, 790 SourceLocation Loc, 791 DeclarationName Entity); 792 QualType BuildBlockPointerType(QualType T, 793 SourceLocation Loc, DeclarationName Entity); 794 QualType BuildParenType(QualType T); 795 796 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 797 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 798 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 799 TypeSourceInfo *ReturnTypeInfo); 800 /// \brief Package the given type and TSI into a ParsedType. 801 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 802 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 803 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 804 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 805 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 806 bool CheckDistantExceptionSpec(QualType T); 807 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 808 bool CheckEquivalentExceptionSpec( 809 const FunctionProtoType *Old, SourceLocation OldLoc, 810 const FunctionProtoType *New, SourceLocation NewLoc); 811 bool CheckEquivalentExceptionSpec( 812 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 813 const FunctionProtoType *Old, SourceLocation OldLoc, 814 const FunctionProtoType *New, SourceLocation NewLoc, 815 bool *MissingExceptionSpecification = 0, 816 bool *MissingEmptyExceptionSpecification = 0, 817 bool AllowNoexceptAllMatchWithNoSpec = false, 818 bool IsOperatorNew = false); 819 bool CheckExceptionSpecSubset( 820 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 821 const FunctionProtoType *Superset, SourceLocation SuperLoc, 822 const FunctionProtoType *Subset, SourceLocation SubLoc); 823 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 824 const FunctionProtoType *Target, SourceLocation TargetLoc, 825 const FunctionProtoType *Source, SourceLocation SourceLoc); 826 827 TypeResult ActOnTypeName(Scope *S, Declarator &D); 828 829 /// \brief The parser has parsed the context-sensitive type 'instancetype' 830 /// in an Objective-C message declaration. Return the appropriate type. 831 ParsedType ActOnObjCInstanceType(SourceLocation Loc); 832 833 bool RequireCompleteType(SourceLocation Loc, QualType T, 834 const PartialDiagnostic &PD, 835 std::pair<SourceLocation, PartialDiagnostic> Note); 836 bool RequireCompleteType(SourceLocation Loc, QualType T, 837 const PartialDiagnostic &PD); 838 bool RequireCompleteType(SourceLocation Loc, QualType T, 839 unsigned DiagID); 840 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 841 std::pair<SourceLocation, 842 PartialDiagnostic> Note); 843 844 845 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 846 const CXXScopeSpec &SS, QualType T); 847 848 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 849 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 850 QualType BuildUnaryTransformType(QualType BaseType, 851 UnaryTransformType::UTTKind UKind, 852 SourceLocation Loc); 853 854 //===--------------------------------------------------------------------===// 855 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 856 // 857 858 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 859 860 void DiagnoseUseOfUnimplementedSelectors(); 861 862 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 863 Scope *S, CXXScopeSpec *SS = 0, 864 bool isClassName = false, 865 bool HasTrailingDot = false, 866 ParsedType ObjectType = ParsedType(), 867 bool WantNontrivialTypeSourceInfo = false); 868 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 869 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 870 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 871 SourceLocation IILoc, 872 Scope *S, 873 CXXScopeSpec *SS, 874 ParsedType &SuggestedType); 875 876 /// \brief Describes the result of the name lookup and resolution performed 877 /// by \c ClassifyName(). 878 enum NameClassificationKind { 879 NC_Unknown, 880 NC_Error, 881 NC_Keyword, 882 NC_Type, 883 NC_Expression, 884 NC_NestedNameSpecifier, 885 NC_TypeTemplate, 886 NC_FunctionTemplate 887 }; 888 889 class NameClassification { 890 NameClassificationKind Kind; 891 ExprResult Expr; 892 TemplateName Template; 893 ParsedType Type; 894 const IdentifierInfo *Keyword; 895 896 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 897 898 public: 899 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 900 901 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 902 903 NameClassification(const IdentifierInfo *Keyword) 904 : Kind(NC_Keyword), Keyword(Keyword) { } 905 906 static NameClassification Error() { 907 return NameClassification(NC_Error); 908 } 909 910 static NameClassification Unknown() { 911 return NameClassification(NC_Unknown); 912 } 913 914 static NameClassification NestedNameSpecifier() { 915 return NameClassification(NC_NestedNameSpecifier); 916 } 917 918 static NameClassification TypeTemplate(TemplateName Name) { 919 NameClassification Result(NC_TypeTemplate); 920 Result.Template = Name; 921 return Result; 922 } 923 924 static NameClassification FunctionTemplate(TemplateName Name) { 925 NameClassification Result(NC_FunctionTemplate); 926 Result.Template = Name; 927 return Result; 928 } 929 930 NameClassificationKind getKind() const { return Kind; } 931 932 ParsedType getType() const { 933 assert(Kind == NC_Type); 934 return Type; 935 } 936 937 ExprResult getExpression() const { 938 assert(Kind == NC_Expression); 939 return Expr; 940 } 941 942 TemplateName getTemplateName() const { 943 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 944 return Template; 945 } 946 947 TemplateNameKind getTemplateNameKind() const { 948 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 949 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 950 } 951}; 952 953 /// \brief Perform name lookup on the given name, classifying it based on 954 /// the results of name lookup and the following token. 955 /// 956 /// This routine is used by the parser to resolve identifiers and help direct 957 /// parsing. When the identifier cannot be found, this routine will attempt 958 /// to correct the typo and classify based on the resulting name. 959 /// 960 /// \param S The scope in which we're performing name lookup. 961 /// 962 /// \param SS The nested-name-specifier that precedes the name. 963 /// 964 /// \param Name The identifier. If typo correction finds an alternative name, 965 /// this pointer parameter will be updated accordingly. 966 /// 967 /// \param NameLoc The location of the identifier. 968 /// 969 /// \param NextToken The token following the identifier. Used to help 970 /// disambiguate the name. 971 NameClassification ClassifyName(Scope *S, 972 CXXScopeSpec &SS, 973 IdentifierInfo *&Name, 974 SourceLocation NameLoc, 975 const Token &NextToken); 976 977 Decl *ActOnDeclarator(Scope *S, Declarator &D); 978 979 Decl *HandleDeclarator(Scope *S, Declarator &D, 980 MultiTemplateParamsArg TemplateParameterLists, 981 bool IsFunctionDefinition); 982 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 983 const LookupResult &Previous, 984 Scope *S); 985 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 986 void DiagnoseFunctionSpecifiers(Declarator& D); 987 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 988 void CheckShadow(Scope *S, VarDecl *D); 989 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 990 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 991 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 992 QualType R, TypeSourceInfo *TInfo, 993 LookupResult &Previous, bool &Redeclaration); 994 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 995 LookupResult &Previous, bool &Redeclaration); 996 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 997 QualType R, TypeSourceInfo *TInfo, 998 LookupResult &Previous, 999 MultiTemplateParamsArg TemplateParamLists, 1000 bool &Redeclaration); 1001 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 1002 bool &Redeclaration); 1003 void CheckCompleteVariableDeclaration(VarDecl *var); 1004 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 1005 QualType R, TypeSourceInfo *TInfo, 1006 LookupResult &Previous, 1007 MultiTemplateParamsArg TemplateParamLists, 1008 bool IsFunctionDefinition, 1009 bool &Redeclaration, 1010 bool &AddToScope); 1011 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1012 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1013 void CheckFunctionDeclaration(Scope *S, 1014 FunctionDecl *NewFD, LookupResult &Previous, 1015 bool IsExplicitSpecialization, 1016 bool &Redeclaration); 1017 void CheckMain(FunctionDecl *FD, const DeclSpec &D); 1018 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1019 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1020 SourceLocation Loc, 1021 QualType T); 1022 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1023 SourceLocation NameLoc, IdentifierInfo *Name, 1024 QualType T, TypeSourceInfo *TSInfo, 1025 StorageClass SC, StorageClass SCAsWritten); 1026 void ActOnParamDefaultArgument(Decl *param, 1027 SourceLocation EqualLoc, 1028 Expr *defarg); 1029 void ActOnParamUnparsedDefaultArgument(Decl *param, 1030 SourceLocation EqualLoc, 1031 SourceLocation ArgLoc); 1032 void ActOnParamDefaultArgumentError(Decl *param); 1033 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1034 SourceLocation EqualLoc); 1035 1036 void CheckSelfReference(Decl *OrigDecl, Expr *E); 1037 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1038 bool TypeMayContainAuto); 1039 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1040 void ActOnInitializerError(Decl *Dcl); 1041 void ActOnCXXForRangeDecl(Decl *D); 1042 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1043 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1044 void FinalizeDeclaration(Decl *D); 1045 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1046 Decl **Group, 1047 unsigned NumDecls); 1048 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1049 bool TypeMayContainAuto = true); 1050 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1051 SourceLocation LocAfterDecls); 1052 void CheckForFunctionRedefinition(FunctionDecl *FD); 1053 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1054 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1055 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1056 1057 void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope); 1058 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1059 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1060 1061 /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an 1062 /// attribute for which parsing is delayed. 1063 void ActOnFinishDelayedAttribute(Scope *S, Decl *D, ParsedAttributes &Attrs); 1064 1065 /// \brief Diagnose any unused parameters in the given sequence of 1066 /// ParmVarDecl pointers. 1067 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1068 ParmVarDecl * const *End); 1069 1070 /// \brief Diagnose whether the size of parameters or return value of a 1071 /// function or obj-c method definition is pass-by-value and larger than a 1072 /// specified threshold. 1073 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1074 ParmVarDecl * const *End, 1075 QualType ReturnTy, 1076 NamedDecl *D); 1077 1078 void DiagnoseInvalidJumps(Stmt *Body); 1079 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1080 SourceLocation AsmLoc, 1081 SourceLocation RParenLoc); 1082 1083 /// \brief The parser has processed a module import declaration. 1084 /// 1085 /// \param ImportLoc The location of the '__import_module__' keyword. 1086 /// 1087 /// \param ModuleName The name of the module. 1088 /// 1089 /// \param ModuleNameLoc The location of the module name. 1090 DeclResult ActOnModuleImport(SourceLocation ImportLoc, 1091 IdentifierInfo &ModuleName, 1092 SourceLocation ModuleNameLoc); 1093 1094 /// \brief Diagnose that \p New is a module-private redeclaration of 1095 /// \p Old. 1096 void diagnoseModulePrivateRedeclaration(NamedDecl *New, NamedDecl *Old, 1097 SourceLocation ModulePrivateKeyword 1098 = SourceLocation()); 1099 1100 /// Scope actions. 1101 void ActOnPopScope(SourceLocation Loc, Scope *S); 1102 void ActOnTranslationUnitScope(Scope *S); 1103 1104 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1105 DeclSpec &DS); 1106 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1107 DeclSpec &DS, 1108 MultiTemplateParamsArg TemplateParams); 1109 1110 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1111 1112 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1113 AccessSpecifier AS, 1114 RecordDecl *Record); 1115 1116 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1117 RecordDecl *Record); 1118 1119 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1120 TagTypeKind NewTag, bool isDefinition, 1121 SourceLocation NewTagLoc, 1122 const IdentifierInfo &Name); 1123 1124 enum TagUseKind { 1125 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1126 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1127 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1128 TUK_Friend // Friend declaration: 'friend struct foo;' 1129 }; 1130 1131 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1132 SourceLocation KWLoc, CXXScopeSpec &SS, 1133 IdentifierInfo *Name, SourceLocation NameLoc, 1134 AttributeList *Attr, AccessSpecifier AS, 1135 SourceLocation ModulePrivateLoc, 1136 MultiTemplateParamsArg TemplateParameterLists, 1137 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1138 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1139 1140 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1141 unsigned TagSpec, SourceLocation TagLoc, 1142 CXXScopeSpec &SS, 1143 IdentifierInfo *Name, SourceLocation NameLoc, 1144 AttributeList *Attr, 1145 MultiTemplateParamsArg TempParamLists); 1146 1147 TypeResult ActOnDependentTag(Scope *S, 1148 unsigned TagSpec, 1149 TagUseKind TUK, 1150 const CXXScopeSpec &SS, 1151 IdentifierInfo *Name, 1152 SourceLocation TagLoc, 1153 SourceLocation NameLoc); 1154 1155 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1156 IdentifierInfo *ClassName, 1157 SmallVectorImpl<Decl *> &Decls); 1158 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1159 Declarator &D, Expr *BitfieldWidth); 1160 1161 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1162 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1163 AccessSpecifier AS); 1164 1165 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1166 TypeSourceInfo *TInfo, 1167 RecordDecl *Record, SourceLocation Loc, 1168 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1169 SourceLocation TSSL, 1170 AccessSpecifier AS, NamedDecl *PrevDecl, 1171 Declarator *D = 0); 1172 1173 enum CXXSpecialMember { 1174 CXXDefaultConstructor, 1175 CXXCopyConstructor, 1176 CXXMoveConstructor, 1177 CXXCopyAssignment, 1178 CXXMoveAssignment, 1179 CXXDestructor, 1180 CXXInvalid 1181 }; 1182 bool CheckNontrivialField(FieldDecl *FD); 1183 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1184 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1185 void ActOnLastBitfield(SourceLocation DeclStart, 1186 SmallVectorImpl<Decl *> &AllIvarDecls); 1187 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, 1188 Declarator &D, Expr *BitfieldWidth, 1189 tok::ObjCKeywordKind visibility); 1190 1191 // This is used for both record definitions and ObjC interface declarations. 1192 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1193 Decl **Fields, unsigned NumFields, 1194 SourceLocation LBrac, SourceLocation RBrac, 1195 AttributeList *AttrList); 1196 1197 /// ActOnTagStartDefinition - Invoked when we have entered the 1198 /// scope of a tag's definition (e.g., for an enumeration, class, 1199 /// struct, or union). 1200 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1201 1202 void ActOnObjCContainerStartDefinition(Decl *IDecl); 1203 1204 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1205 /// C++ record definition's base-specifiers clause and are starting its 1206 /// member declarations. 1207 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1208 SourceLocation FinalLoc, 1209 SourceLocation LBraceLoc); 1210 1211 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1212 /// the definition of a tag (enumeration, class, struct, or union). 1213 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1214 SourceLocation RBraceLoc); 1215 1216 void ActOnObjCContainerFinishDefinition(); 1217 1218 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1219 /// error parsing the definition of a tag. 1220 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1221 1222 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1223 EnumConstantDecl *LastEnumConst, 1224 SourceLocation IdLoc, 1225 IdentifierInfo *Id, 1226 Expr *val); 1227 1228 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1229 SourceLocation IdLoc, IdentifierInfo *Id, 1230 AttributeList *Attrs, 1231 SourceLocation EqualLoc, Expr *Val); 1232 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1233 SourceLocation RBraceLoc, Decl *EnumDecl, 1234 Decl **Elements, unsigned NumElements, 1235 Scope *S, AttributeList *Attr); 1236 1237 DeclContext *getContainingDC(DeclContext *DC); 1238 1239 /// Set the current declaration context until it gets popped. 1240 void PushDeclContext(Scope *S, DeclContext *DC); 1241 void PopDeclContext(); 1242 1243 /// EnterDeclaratorContext - Used when we must lookup names in the context 1244 /// of a declarator's nested name specifier. 1245 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1246 void ExitDeclaratorContext(Scope *S); 1247 1248 /// Push the parameters of D, which must be a function, into scope. 1249 void ActOnReenterFunctionContext(Scope* S, Decl* D); 1250 void ActOnExitFunctionContext() { PopDeclContext(); } 1251 1252 DeclContext *getFunctionLevelDeclContext(); 1253 1254 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1255 /// to the function decl for the function being parsed. If we're currently 1256 /// in a 'block', this returns the containing context. 1257 FunctionDecl *getCurFunctionDecl(); 1258 1259 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1260 /// the method decl for the method being parsed. If we're currently 1261 /// in a 'block', this returns the containing context. 1262 ObjCMethodDecl *getCurMethodDecl(); 1263 1264 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1265 /// or C function we're in, otherwise return null. If we're currently 1266 /// in a 'block', this returns the containing context. 1267 NamedDecl *getCurFunctionOrMethodDecl(); 1268 1269 /// Add this decl to the scope shadowed decl chains. 1270 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1271 1272 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1273 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1274 /// true if 'D' belongs to the given declaration context. 1275 /// 1276 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1277 /// whether the declaration is in scope for the purposes of explicit template 1278 /// instantiation or specialization. The default is false. 1279 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1280 bool ExplicitInstantiationOrSpecialization = false); 1281 1282 /// Finds the scope corresponding to the given decl context, if it 1283 /// happens to be an enclosing scope. Otherwise return NULL. 1284 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1285 1286 /// Subroutines of ActOnDeclarator(). 1287 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1288 TypeSourceInfo *TInfo); 1289 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1290 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1291 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1292 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1293 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1294 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1295 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1296 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1297 1298 // AssignmentAction - This is used by all the assignment diagnostic functions 1299 // to represent what is actually causing the operation 1300 enum AssignmentAction { 1301 AA_Assigning, 1302 AA_Passing, 1303 AA_Returning, 1304 AA_Converting, 1305 AA_Initializing, 1306 AA_Sending, 1307 AA_Casting 1308 }; 1309 1310 /// C++ Overloading. 1311 enum OverloadKind { 1312 /// This is a legitimate overload: the existing declarations are 1313 /// functions or function templates with different signatures. 1314 Ovl_Overload, 1315 1316 /// This is not an overload because the signature exactly matches 1317 /// an existing declaration. 1318 Ovl_Match, 1319 1320 /// This is not an overload because the lookup results contain a 1321 /// non-function. 1322 Ovl_NonFunction 1323 }; 1324 OverloadKind CheckOverload(Scope *S, 1325 FunctionDecl *New, 1326 const LookupResult &OldDecls, 1327 NamedDecl *&OldDecl, 1328 bool IsForUsingDecl); 1329 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1330 1331 /// \brief Checks availability of the function depending on the current 1332 /// function context.Inside an unavailable function,unavailability is ignored. 1333 /// 1334 /// \returns true if \arg FD is unavailable and current context is inside 1335 /// an available function, false otherwise. 1336 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1337 1338 ImplicitConversionSequence 1339 TryImplicitConversion(Expr *From, QualType ToType, 1340 bool SuppressUserConversions, 1341 bool AllowExplicit, 1342 bool InOverloadResolution, 1343 bool CStyle, 1344 bool AllowObjCWritebackConversion); 1345 1346 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1347 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1348 bool IsComplexPromotion(QualType FromType, QualType ToType); 1349 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1350 bool InOverloadResolution, 1351 QualType& ConvertedType, bool &IncompatibleObjC); 1352 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1353 QualType& ConvertedType, bool &IncompatibleObjC); 1354 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1355 QualType &ConvertedType); 1356 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1357 QualType& ConvertedType); 1358 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1359 const FunctionProtoType *NewType); 1360 1361 CastKind PrepareCastToObjCObjectPointer(ExprResult &E); 1362 bool CheckPointerConversion(Expr *From, QualType ToType, 1363 CastKind &Kind, 1364 CXXCastPath& BasePath, 1365 bool IgnoreBaseAccess); 1366 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1367 bool InOverloadResolution, 1368 QualType &ConvertedType); 1369 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1370 CastKind &Kind, 1371 CXXCastPath &BasePath, 1372 bool IgnoreBaseAccess); 1373 bool IsQualificationConversion(QualType FromType, QualType ToType, 1374 bool CStyle, bool &ObjCLifetimeConversion); 1375 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1376 QualType &ResultTy); 1377 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1378 1379 1380 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1381 const VarDecl *NRVOCandidate, 1382 QualType ResultType, 1383 Expr *Value, 1384 bool AllowNRVO = true); 1385 1386 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1387 ExprResult Init); 1388 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1389 SourceLocation EqualLoc, 1390 ExprResult Init, 1391 bool TopLevelOfInitList = false); 1392 ExprResult PerformObjectArgumentInitialization(Expr *From, 1393 NestedNameSpecifier *Qualifier, 1394 NamedDecl *FoundDecl, 1395 CXXMethodDecl *Method); 1396 1397 ExprResult PerformContextuallyConvertToBool(Expr *From); 1398 ExprResult PerformContextuallyConvertToObjCPointer(Expr *From); 1399 1400 ExprResult 1401 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1402 const PartialDiagnostic &NotIntDiag, 1403 const PartialDiagnostic &IncompleteDiag, 1404 const PartialDiagnostic &ExplicitConvDiag, 1405 const PartialDiagnostic &ExplicitConvNote, 1406 const PartialDiagnostic &AmbigDiag, 1407 const PartialDiagnostic &AmbigNote, 1408 const PartialDiagnostic &ConvDiag); 1409 1410 ExprResult PerformObjectMemberConversion(Expr *From, 1411 NestedNameSpecifier *Qualifier, 1412 NamedDecl *FoundDecl, 1413 NamedDecl *Member); 1414 1415 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1416 // TODO: make this is a typesafe union. 1417 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1418 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1419 1420 void AddOverloadCandidate(NamedDecl *Function, 1421 DeclAccessPair FoundDecl, 1422 Expr **Args, unsigned NumArgs, 1423 OverloadCandidateSet &CandidateSet); 1424 1425 void AddOverloadCandidate(FunctionDecl *Function, 1426 DeclAccessPair FoundDecl, 1427 Expr **Args, unsigned NumArgs, 1428 OverloadCandidateSet& CandidateSet, 1429 bool SuppressUserConversions = false, 1430 bool PartialOverloading = false); 1431 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1432 Expr **Args, unsigned NumArgs, 1433 OverloadCandidateSet& CandidateSet, 1434 bool SuppressUserConversions = false); 1435 void AddMethodCandidate(DeclAccessPair FoundDecl, 1436 QualType ObjectType, 1437 Expr::Classification ObjectClassification, 1438 Expr **Args, unsigned NumArgs, 1439 OverloadCandidateSet& CandidateSet, 1440 bool SuppressUserConversion = false); 1441 void AddMethodCandidate(CXXMethodDecl *Method, 1442 DeclAccessPair FoundDecl, 1443 CXXRecordDecl *ActingContext, QualType ObjectType, 1444 Expr::Classification ObjectClassification, 1445 Expr **Args, unsigned NumArgs, 1446 OverloadCandidateSet& CandidateSet, 1447 bool SuppressUserConversions = false); 1448 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1449 DeclAccessPair FoundDecl, 1450 CXXRecordDecl *ActingContext, 1451 TemplateArgumentListInfo *ExplicitTemplateArgs, 1452 QualType ObjectType, 1453 Expr::Classification ObjectClassification, 1454 Expr **Args, unsigned NumArgs, 1455 OverloadCandidateSet& CandidateSet, 1456 bool SuppressUserConversions = false); 1457 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1458 DeclAccessPair FoundDecl, 1459 TemplateArgumentListInfo *ExplicitTemplateArgs, 1460 Expr **Args, unsigned NumArgs, 1461 OverloadCandidateSet& CandidateSet, 1462 bool SuppressUserConversions = false); 1463 void AddConversionCandidate(CXXConversionDecl *Conversion, 1464 DeclAccessPair FoundDecl, 1465 CXXRecordDecl *ActingContext, 1466 Expr *From, QualType ToType, 1467 OverloadCandidateSet& CandidateSet); 1468 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1469 DeclAccessPair FoundDecl, 1470 CXXRecordDecl *ActingContext, 1471 Expr *From, QualType ToType, 1472 OverloadCandidateSet &CandidateSet); 1473 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1474 DeclAccessPair FoundDecl, 1475 CXXRecordDecl *ActingContext, 1476 const FunctionProtoType *Proto, 1477 Expr *Object, Expr **Args, unsigned NumArgs, 1478 OverloadCandidateSet& CandidateSet); 1479 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1480 SourceLocation OpLoc, 1481 Expr **Args, unsigned NumArgs, 1482 OverloadCandidateSet& CandidateSet, 1483 SourceRange OpRange = SourceRange()); 1484 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1485 Expr **Args, unsigned NumArgs, 1486 OverloadCandidateSet& CandidateSet, 1487 bool IsAssignmentOperator = false, 1488 unsigned NumContextualBoolArguments = 0); 1489 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1490 SourceLocation OpLoc, 1491 Expr **Args, unsigned NumArgs, 1492 OverloadCandidateSet& CandidateSet); 1493 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1494 bool Operator, 1495 Expr **Args, unsigned NumArgs, 1496 TemplateArgumentListInfo *ExplicitTemplateArgs, 1497 OverloadCandidateSet& CandidateSet, 1498 bool PartialOverloading = false, 1499 bool StdNamespaceIsAssociated = false); 1500 1501 // Emit as a 'note' the specific overload candidate 1502 void NoteOverloadCandidate(FunctionDecl *Fn); 1503 1504 // Emit as a series of 'note's all template and non-templates 1505 // identified by the expression Expr 1506 void NoteAllOverloadCandidates(Expr* E); 1507 1508 // [PossiblyAFunctionType] --> [Return] 1509 // NonFunctionType --> NonFunctionType 1510 // R (A) --> R(A) 1511 // R (*)(A) --> R (A) 1512 // R (&)(A) --> R (A) 1513 // R (S::*)(A) --> R (A) 1514 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1515 1516 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1517 bool Complain, 1518 DeclAccessPair &Found); 1519 1520 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1521 bool Complain = false, 1522 DeclAccessPair* Found = 0); 1523 1524 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1525 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1526 bool Complain = false, 1527 const SourceRange& OpRangeForComplaining = SourceRange(), 1528 QualType DestTypeForComplaining = QualType(), 1529 unsigned DiagIDForComplaining = 0); 1530 1531 1532 Expr *FixOverloadedFunctionReference(Expr *E, 1533 DeclAccessPair FoundDecl, 1534 FunctionDecl *Fn); 1535 ExprResult FixOverloadedFunctionReference(ExprResult, 1536 DeclAccessPair FoundDecl, 1537 FunctionDecl *Fn); 1538 1539 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1540 Expr **Args, unsigned NumArgs, 1541 OverloadCandidateSet &CandidateSet, 1542 bool PartialOverloading = false); 1543 1544 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1545 UnresolvedLookupExpr *ULE, 1546 SourceLocation LParenLoc, 1547 Expr **Args, unsigned NumArgs, 1548 SourceLocation RParenLoc, 1549 Expr *ExecConfig); 1550 1551 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1552 unsigned Opc, 1553 const UnresolvedSetImpl &Fns, 1554 Expr *input); 1555 1556 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1557 unsigned Opc, 1558 const UnresolvedSetImpl &Fns, 1559 Expr *LHS, Expr *RHS); 1560 1561 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1562 SourceLocation RLoc, 1563 Expr *Base,Expr *Idx); 1564 1565 ExprResult 1566 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1567 SourceLocation LParenLoc, Expr **Args, 1568 unsigned NumArgs, SourceLocation RParenLoc); 1569 ExprResult 1570 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1571 Expr **Args, unsigned NumArgs, 1572 SourceLocation RParenLoc); 1573 1574 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1575 SourceLocation OpLoc); 1576 1577 /// CheckCallReturnType - Checks that a call expression's return type is 1578 /// complete. Returns true on failure. The location passed in is the location 1579 /// that best represents the call. 1580 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1581 CallExpr *CE, FunctionDecl *FD); 1582 1583 /// Helpers for dealing with blocks and functions. 1584 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1585 bool CheckParameterNames); 1586 void CheckCXXDefaultArguments(FunctionDecl *FD); 1587 void CheckExtraCXXDefaultArguments(Declarator &D); 1588 Scope *getNonFieldDeclScope(Scope *S); 1589 1590 /// \name Name lookup 1591 /// 1592 /// These routines provide name lookup that is used during semantic 1593 /// analysis to resolve the various kinds of names (identifiers, 1594 /// overloaded operator names, constructor names, etc.) into zero or 1595 /// more declarations within a particular scope. The major entry 1596 /// points are LookupName, which performs unqualified name lookup, 1597 /// and LookupQualifiedName, which performs qualified name lookup. 1598 /// 1599 /// All name lookup is performed based on some specific criteria, 1600 /// which specify what names will be visible to name lookup and how 1601 /// far name lookup should work. These criteria are important both 1602 /// for capturing language semantics (certain lookups will ignore 1603 /// certain names, for example) and for performance, since name 1604 /// lookup is often a bottleneck in the compilation of C++. Name 1605 /// lookup criteria is specified via the LookupCriteria enumeration. 1606 /// 1607 /// The results of name lookup can vary based on the kind of name 1608 /// lookup performed, the current language, and the translation 1609 /// unit. In C, for example, name lookup will either return nothing 1610 /// (no entity found) or a single declaration. In C++, name lookup 1611 /// can additionally refer to a set of overloaded functions or 1612 /// result in an ambiguity. All of the possible results of name 1613 /// lookup are captured by the LookupResult class, which provides 1614 /// the ability to distinguish among them. 1615 //@{ 1616 1617 /// @brief Describes the kind of name lookup to perform. 1618 enum LookupNameKind { 1619 /// Ordinary name lookup, which finds ordinary names (functions, 1620 /// variables, typedefs, etc.) in C and most kinds of names 1621 /// (functions, variables, members, types, etc.) in C++. 1622 LookupOrdinaryName = 0, 1623 /// Tag name lookup, which finds the names of enums, classes, 1624 /// structs, and unions. 1625 LookupTagName, 1626 /// Label name lookup. 1627 LookupLabel, 1628 /// Member name lookup, which finds the names of 1629 /// class/struct/union members. 1630 LookupMemberName, 1631 /// Look up of an operator name (e.g., operator+) for use with 1632 /// operator overloading. This lookup is similar to ordinary name 1633 /// lookup, but will ignore any declarations that are class members. 1634 LookupOperatorName, 1635 /// Look up of a name that precedes the '::' scope resolution 1636 /// operator in C++. This lookup completely ignores operator, object, 1637 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1638 LookupNestedNameSpecifierName, 1639 /// Look up a namespace name within a C++ using directive or 1640 /// namespace alias definition, ignoring non-namespace names (C++ 1641 /// [basic.lookup.udir]p1). 1642 LookupNamespaceName, 1643 /// Look up all declarations in a scope with the given name, 1644 /// including resolved using declarations. This is appropriate 1645 /// for checking redeclarations for a using declaration. 1646 LookupUsingDeclName, 1647 /// Look up an ordinary name that is going to be redeclared as a 1648 /// name with linkage. This lookup ignores any declarations that 1649 /// are outside of the current scope unless they have linkage. See 1650 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1651 LookupRedeclarationWithLinkage, 1652 /// Look up the name of an Objective-C protocol. 1653 LookupObjCProtocolName, 1654 /// Look up implicit 'self' parameter of an objective-c method. 1655 LookupObjCImplicitSelfParam, 1656 /// \brief Look up any declaration with any name. 1657 LookupAnyName 1658 }; 1659 1660 /// \brief Specifies whether (or how) name lookup is being performed for a 1661 /// redeclaration (vs. a reference). 1662 enum RedeclarationKind { 1663 /// \brief The lookup is a reference to this name that is not for the 1664 /// purpose of redeclaring the name. 1665 NotForRedeclaration = 0, 1666 /// \brief The lookup results will be used for redeclaration of a name, 1667 /// if an entity by that name already exists. 1668 ForRedeclaration 1669 }; 1670 1671private: 1672 bool CppLookupName(LookupResult &R, Scope *S); 1673 1674 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1675 CXXSpecialMember SM, 1676 bool ConstArg, 1677 bool VolatileArg, 1678 bool RValueThis, 1679 bool ConstThis, 1680 bool VolatileThis); 1681 1682 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1683 // 1684 // The boolean value will be true to indicate that the namespace was loaded 1685 // from an AST/PCH file, or false otherwise. 1686 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1687 1688 /// \brief Whether we have already loaded known namespaces from an extenal 1689 /// source. 1690 bool LoadedExternalKnownNamespaces; 1691 1692public: 1693 /// \brief Look up a name, looking for a single declaration. Return 1694 /// null if the results were absent, ambiguous, or overloaded. 1695 /// 1696 /// It is preferable to use the elaborated form and explicitly handle 1697 /// ambiguity and overloaded. 1698 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1699 SourceLocation Loc, 1700 LookupNameKind NameKind, 1701 RedeclarationKind Redecl 1702 = NotForRedeclaration); 1703 bool LookupName(LookupResult &R, Scope *S, 1704 bool AllowBuiltinCreation = false); 1705 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1706 bool InUnqualifiedLookup = false); 1707 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1708 bool AllowBuiltinCreation = false, 1709 bool EnteringContext = false); 1710 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1711 1712 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1713 QualType T1, QualType T2, 1714 UnresolvedSetImpl &Functions); 1715 1716 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1717 SourceLocation GnuLabelLoc = SourceLocation()); 1718 1719 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1720 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1721 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1722 unsigned Quals, 1723 bool *ConstParam = 0); 1724 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1725 bool RValueThis, unsigned ThisQuals, 1726 bool *ConstParam = 0); 1727 CXXConstructorDecl *LookupMovingConstructor(CXXRecordDecl *Class); 1728 CXXMethodDecl *LookupMovingAssignment(CXXRecordDecl *Class, bool RValueThis, 1729 unsigned ThisQuals); 1730 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1731 1732 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1733 Expr **Args, unsigned NumArgs, 1734 ADLResult &Functions, 1735 bool StdNamespaceIsAssociated = false); 1736 1737 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1738 VisibleDeclConsumer &Consumer, 1739 bool IncludeGlobalScope = true); 1740 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1741 VisibleDeclConsumer &Consumer, 1742 bool IncludeGlobalScope = true); 1743 1744 /// \brief The context in which typo-correction occurs. 1745 /// 1746 /// The typo-correction context affects which keywords (if any) are 1747 /// considered when trying to correct for typos. 1748 enum CorrectTypoContext { 1749 /// \brief An unknown context, where any keyword might be valid. 1750 CTC_Unknown, 1751 /// \brief A context where no keywords are used (e.g. we expect an actual 1752 /// name). 1753 CTC_NoKeywords, 1754 /// \brief A context where we're correcting a type name. 1755 CTC_Type, 1756 /// \brief An expression context. 1757 CTC_Expression, 1758 /// \brief A type cast, or anything else that can be followed by a '<'. 1759 CTC_CXXCasts, 1760 /// \brief A member lookup context. 1761 CTC_MemberLookup, 1762 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1763 CTC_ObjCIvarLookup, 1764 /// \brief An Objective-C property lookup context (e.g., self.prop). 1765 CTC_ObjCPropertyLookup, 1766 /// \brief The receiver of an Objective-C message send within an 1767 /// Objective-C method where 'super' is a valid keyword. 1768 CTC_ObjCMessageReceiver 1769 }; 1770 1771 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1772 Sema::LookupNameKind LookupKind, 1773 Scope *S, CXXScopeSpec *SS, 1774 DeclContext *MemberContext = NULL, 1775 bool EnteringContext = false, 1776 CorrectTypoContext CTC = CTC_Unknown, 1777 const ObjCObjectPointerType *OPT = NULL); 1778 1779 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1780 AssociatedNamespaceSet &AssociatedNamespaces, 1781 AssociatedClassSet &AssociatedClasses); 1782 1783 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1784 bool ConsiderLinkage, 1785 bool ExplicitInstantiationOrSpecialization); 1786 1787 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1788 //@} 1789 1790 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1791 SourceLocation IdLoc, 1792 bool TypoCorrection = false); 1793 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1794 Scope *S, bool ForRedeclaration, 1795 SourceLocation Loc); 1796 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1797 Scope *S); 1798 void AddKnownFunctionAttributes(FunctionDecl *FD); 1799 1800 // More parsing and symbol table subroutines. 1801 1802 // Decl attributes - this routine is the top level dispatcher. 1803 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1804 bool NonInheritable = true, bool Inheritable = true); 1805 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1806 bool NonInheritable = true, bool Inheritable = true); 1807 1808 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1809 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1810 bool CheckNoReturnAttr(const AttributeList &attr); 1811 1812 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1813 bool &IncompleteImpl, unsigned DiagID); 1814 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1815 ObjCMethodDecl *MethodDecl, 1816 bool IsProtocolMethodDecl, 1817 bool IsDeclaration = false); 1818 1819 /// WarnExactTypedMethods - This routine issues a warning if method 1820 /// implementation declaration matches exactly that of its declaration. 1821 void WarnExactTypedMethods(ObjCMethodDecl *Method, 1822 ObjCMethodDecl *MethodDecl, 1823 bool IsProtocolMethodDecl); 1824 1825 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1826 ObjCInterfaceDecl *IDecl); 1827 1828 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1829 typedef llvm::DenseMap<Selector, ObjCMethodDecl*> ProtocolsMethodsMap; 1830 1831 /// CheckProtocolMethodDefs - This routine checks unimplemented 1832 /// methods declared in protocol, and those referenced by it. 1833 /// \param IDecl - Used for checking for methods which may have been 1834 /// inherited. 1835 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1836 ObjCProtocolDecl *PDecl, 1837 bool& IncompleteImpl, 1838 const SelectorSet &InsMap, 1839 const SelectorSet &ClsMap, 1840 ObjCContainerDecl *CDecl); 1841 1842 /// CheckImplementationIvars - This routine checks if the instance variables 1843 /// listed in the implelementation match those listed in the interface. 1844 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1845 ObjCIvarDecl **Fields, unsigned nIvars, 1846 SourceLocation Loc); 1847 1848 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1849 /// remains unimplemented in the class or category @implementation. 1850 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1851 ObjCContainerDecl* IDecl, 1852 bool IncompleteImpl = false); 1853 1854 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1855 /// which must be implemented by this implementation. 1856 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1857 ObjCContainerDecl *CDecl, 1858 const SelectorSet &InsMap); 1859 1860 /// DefaultSynthesizeProperties - This routine default synthesizes all 1861 /// properties which must be synthesized in class's @implementation. 1862 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1863 ObjCInterfaceDecl *IDecl); 1864 void DefaultSynthesizeProperties(Scope *S, Decl *D); 1865 1866 /// CollectImmediateProperties - This routine collects all properties in 1867 /// the class and its conforming protocols; but not those it its super class. 1868 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1869 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1870 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1871 1872 1873 /// LookupPropertyDecl - Looks up a property in the current class and all 1874 /// its protocols. 1875 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1876 IdentifierInfo *II); 1877 1878 /// Called by ActOnProperty to handle @property declarations in 1879 //// class extensions. 1880 Decl *HandlePropertyInClassExtension(Scope *S, 1881 SourceLocation AtLoc, 1882 FieldDeclarator &FD, 1883 Selector GetterSel, 1884 Selector SetterSel, 1885 const bool isAssign, 1886 const bool isReadWrite, 1887 const unsigned Attributes, 1888 bool *isOverridingProperty, 1889 TypeSourceInfo *T, 1890 tok::ObjCKeywordKind MethodImplKind); 1891 1892 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1893 /// handle creating the ObjcPropertyDecl for a category or @interface. 1894 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1895 ObjCContainerDecl *CDecl, 1896 SourceLocation AtLoc, 1897 FieldDeclarator &FD, 1898 Selector GetterSel, 1899 Selector SetterSel, 1900 const bool isAssign, 1901 const bool isReadWrite, 1902 const unsigned Attributes, 1903 TypeSourceInfo *T, 1904 tok::ObjCKeywordKind MethodImplKind, 1905 DeclContext *lexicalDC = 0); 1906 1907 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1908 /// warning) when atomic property has one but not the other user-declared 1909 /// setter or getter. 1910 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1911 ObjCContainerDecl* IDecl); 1912 1913 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1914 1915 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1916 1917 enum MethodMatchStrategy { 1918 MMS_loose, 1919 MMS_strict 1920 }; 1921 1922 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1923 /// true, or false, accordingly. 1924 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1925 const ObjCMethodDecl *PrevMethod, 1926 MethodMatchStrategy strategy = MMS_strict); 1927 1928 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1929 /// or protocol against those declared in their implementations. 1930 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1931 const SelectorSet &ClsMap, 1932 SelectorSet &InsMapSeen, 1933 SelectorSet &ClsMapSeen, 1934 ObjCImplDecl* IMPDecl, 1935 ObjCContainerDecl* IDecl, 1936 bool &IncompleteImpl, 1937 bool ImmediateClass, 1938 bool WarnExactMatch=false); 1939 1940 /// CheckCategoryVsClassMethodMatches - Checks that methods implemented in 1941 /// category matches with those implemented in its primary class and 1942 /// warns each time an exact match is found. 1943 void CheckCategoryVsClassMethodMatches(ObjCCategoryImplDecl *CatIMP); 1944 1945private: 1946 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1947 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1948 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1949 1950 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1951 /// optionally warns if there are multiple signatures. 1952 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1953 bool receiverIdOrClass, 1954 bool warn, bool instance); 1955 1956public: 1957 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1958 /// unit are added to a global pool. This allows us to efficiently associate 1959 /// a selector with a method declaraation for purposes of typechecking 1960 /// messages sent to "id" (where the class of the object is unknown). 1961 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1962 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1963 } 1964 1965 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1966 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1967 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1968 } 1969 1970 /// AddAnyMethodToGlobalPool - Add any method, instance or factory to global 1971 /// pool. 1972 void AddAnyMethodToGlobalPool(Decl *D); 1973 1974 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1975 /// there are multiple signatures. 1976 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1977 bool receiverIdOrClass=false, 1978 bool warn=true) { 1979 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1980 warn, /*instance*/true); 1981 } 1982 1983 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1984 /// there are multiple signatures. 1985 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1986 bool receiverIdOrClass=false, 1987 bool warn=true) { 1988 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1989 warn, /*instance*/false); 1990 } 1991 1992 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1993 /// implementation. 1994 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1995 1996 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1997 /// initialization. 1998 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1999 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 2000 2001 //===--------------------------------------------------------------------===// 2002 // Statement Parsing Callbacks: SemaStmt.cpp. 2003public: 2004 class FullExprArg { 2005 public: 2006 FullExprArg(Sema &actions) : E(0) { } 2007 2008 // FIXME: The const_cast here is ugly. RValue references would make this 2009 // much nicer (or we could duplicate a bunch of the move semantics 2010 // emulation code from Ownership.h). 2011 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 2012 2013 ExprResult release() { 2014 return move(E); 2015 } 2016 2017 Expr *get() const { return E; } 2018 2019 Expr *operator->() { 2020 return E; 2021 } 2022 2023 private: 2024 // FIXME: No need to make the entire Sema class a friend when it's just 2025 // Sema::MakeFullExpr that needs access to the constructor below. 2026 friend class Sema; 2027 2028 explicit FullExprArg(Expr *expr) : E(expr) {} 2029 2030 Expr *E; 2031 }; 2032 2033 FullExprArg MakeFullExpr(Expr *Arg) { 2034 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 2035 } 2036 2037 StmtResult ActOnExprStmt(FullExprArg Expr); 2038 2039 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 2040 bool HasLeadingEmptyMacro = false); 2041 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 2042 MultiStmtArg Elts, 2043 bool isStmtExpr); 2044 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 2045 SourceLocation StartLoc, 2046 SourceLocation EndLoc); 2047 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 2048 StmtResult ActOnForEachLValueExpr(Expr *E); 2049 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 2050 SourceLocation DotDotDotLoc, Expr *RHSVal, 2051 SourceLocation ColonLoc); 2052 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2053 2054 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2055 SourceLocation ColonLoc, 2056 Stmt *SubStmt, Scope *CurScope); 2057 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2058 SourceLocation ColonLoc, Stmt *SubStmt); 2059 2060 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2061 FullExprArg CondVal, Decl *CondVar, 2062 Stmt *ThenVal, 2063 SourceLocation ElseLoc, Stmt *ElseVal); 2064 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2065 Expr *Cond, 2066 Decl *CondVar); 2067 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2068 Stmt *Switch, Stmt *Body); 2069 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2070 FullExprArg Cond, 2071 Decl *CondVar, Stmt *Body); 2072 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2073 SourceLocation WhileLoc, 2074 SourceLocation CondLParen, Expr *Cond, 2075 SourceLocation CondRParen); 2076 2077 StmtResult ActOnForStmt(SourceLocation ForLoc, 2078 SourceLocation LParenLoc, 2079 Stmt *First, FullExprArg Second, 2080 Decl *SecondVar, 2081 FullExprArg Third, 2082 SourceLocation RParenLoc, 2083 Stmt *Body); 2084 ExprResult ActOnObjCForCollectionOperand(SourceLocation forLoc, 2085 Expr *collection); 2086 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2087 SourceLocation LParenLoc, 2088 Stmt *First, Expr *Second, 2089 SourceLocation RParenLoc, Stmt *Body); 2090 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2091 SourceLocation LParenLoc, Stmt *LoopVar, 2092 SourceLocation ColonLoc, Expr *Collection, 2093 SourceLocation RParenLoc); 2094 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2095 SourceLocation ColonLoc, 2096 Stmt *RangeDecl, Stmt *BeginEndDecl, 2097 Expr *Cond, Expr *Inc, 2098 Stmt *LoopVarDecl, 2099 SourceLocation RParenLoc); 2100 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2101 2102 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2103 SourceLocation LabelLoc, 2104 LabelDecl *TheDecl); 2105 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2106 SourceLocation StarLoc, 2107 Expr *DestExp); 2108 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2109 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2110 2111 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2112 bool AllowFunctionParameters); 2113 2114 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2115 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2116 2117 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2118 bool IsSimple, bool IsVolatile, 2119 unsigned NumOutputs, unsigned NumInputs, 2120 IdentifierInfo **Names, 2121 MultiExprArg Constraints, 2122 MultiExprArg Exprs, 2123 Expr *AsmString, 2124 MultiExprArg Clobbers, 2125 SourceLocation RParenLoc, 2126 bool MSAsm = false); 2127 2128 2129 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2130 SourceLocation StartLoc, 2131 SourceLocation IdLoc, IdentifierInfo *Id, 2132 bool Invalid = false); 2133 2134 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2135 2136 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2137 Decl *Parm, Stmt *Body); 2138 2139 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2140 2141 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2142 MultiStmtArg Catch, Stmt *Finally); 2143 2144 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2145 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2146 Scope *CurScope); 2147 ExprResult ActOnObjCAtSynchronizedOperand(SourceLocation atLoc, 2148 Expr *operand); 2149 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2150 Expr *SynchExpr, 2151 Stmt *SynchBody); 2152 2153 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2154 2155 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2156 SourceLocation StartLoc, 2157 SourceLocation IdLoc, 2158 IdentifierInfo *Id); 2159 2160 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2161 2162 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2163 Decl *ExDecl, Stmt *HandlerBlock); 2164 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2165 MultiStmtArg Handlers); 2166 2167 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2168 SourceLocation TryLoc, 2169 Stmt *TryBlock, 2170 Stmt *Handler); 2171 2172 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2173 Expr *FilterExpr, 2174 Stmt *Block); 2175 2176 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2177 Stmt *Block); 2178 2179 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2180 2181 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2182 2183 /// \brief If it's a file scoped decl that must warn if not used, keep track 2184 /// of it. 2185 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2186 2187 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2188 /// whose result is unused, warn. 2189 void DiagnoseUnusedExprResult(const Stmt *S); 2190 void DiagnoseUnusedDecl(const NamedDecl *ND); 2191 2192 ParsingDeclState PushParsingDeclaration() { 2193 return DelayedDiagnostics.pushParsingDecl(); 2194 } 2195 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2196 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2197 } 2198 2199 typedef ProcessingContextState ParsingClassState; 2200 ParsingClassState PushParsingClass() { 2201 return DelayedDiagnostics.pushContext(); 2202 } 2203 void PopParsingClass(ParsingClassState state) { 2204 DelayedDiagnostics.popContext(state); 2205 } 2206 2207 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2208 SourceLocation Loc, 2209 const ObjCInterfaceDecl *UnknownObjCClass=0); 2210 2211 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2212 2213 bool makeUnavailableInSystemHeader(SourceLocation loc, 2214 StringRef message); 2215 2216 //===--------------------------------------------------------------------===// 2217 // Expression Parsing Callbacks: SemaExpr.cpp. 2218 2219 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2220 const ObjCInterfaceDecl *UnknownObjCClass=0); 2221 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2222 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2223 ObjCMethodDecl *Getter, 2224 SourceLocation Loc); 2225 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2226 Expr **Args, unsigned NumArgs); 2227 2228 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2229 2230 void PopExpressionEvaluationContext(); 2231 2232 void DiscardCleanupsInEvaluationContext(); 2233 2234 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2235 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2236 void MarkDeclarationsReferencedInExpr(Expr *E); 2237 2238 /// \brief Figure out if an expression could be turned into a call. 2239 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2240 UnresolvedSetImpl &NonTemplateOverloads); 2241 /// \brief Give notes for a set of overloads. 2242 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2243 const SourceLocation FinalNoteLoc); 2244 2245 /// \brief Conditionally issue a diagnostic based on the current 2246 /// evaluation context. 2247 /// 2248 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2249 /// the function body is parsed, and then do a basic reachability analysis to 2250 /// determine if the statement is reachable. If it is unreachable, the 2251 /// diagnostic will not be emitted. 2252 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *Statement, 2253 const PartialDiagnostic &PD); 2254 2255 // Primary Expressions. 2256 SourceRange getExprRange(Expr *E) const; 2257 2258 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Id, 2259 bool HasTrailingLParen, bool IsAddressOfOperand); 2260 2261 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2262 TemplateArgumentListInfo &Buffer, 2263 DeclarationNameInfo &NameInfo, 2264 const TemplateArgumentListInfo *&TemplateArgs); 2265 2266 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2267 CorrectTypoContext CTC = CTC_Unknown, 2268 TemplateArgumentListInfo *ExplicitTemplateArgs = 0, 2269 Expr **Args = 0, unsigned NumArgs = 0); 2270 2271 ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S, 2272 IdentifierInfo *II, 2273 bool AllowBuiltinCreation=false); 2274 2275 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2276 const DeclarationNameInfo &NameInfo, 2277 bool isAddressOfOperand, 2278 const TemplateArgumentListInfo *TemplateArgs); 2279 2280 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2281 ExprValueKind VK, 2282 SourceLocation Loc, 2283 const CXXScopeSpec *SS = 0); 2284 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2285 ExprValueKind VK, 2286 const DeclarationNameInfo &NameInfo, 2287 const CXXScopeSpec *SS = 0); 2288 ExprResult 2289 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2290 SourceLocation nameLoc, 2291 IndirectFieldDecl *indirectField, 2292 Expr *baseObjectExpr = 0, 2293 SourceLocation opLoc = SourceLocation()); 2294 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2295 LookupResult &R, 2296 const TemplateArgumentListInfo *TemplateArgs); 2297 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2298 LookupResult &R, 2299 const TemplateArgumentListInfo *TemplateArgs, 2300 bool IsDefiniteInstance); 2301 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2302 const LookupResult &R, 2303 bool HasTrailingLParen); 2304 2305 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2306 const DeclarationNameInfo &NameInfo); 2307 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2308 const DeclarationNameInfo &NameInfo, 2309 const TemplateArgumentListInfo *TemplateArgs); 2310 2311 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2312 LookupResult &R, 2313 bool NeedsADL); 2314 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2315 const DeclarationNameInfo &NameInfo, 2316 NamedDecl *D); 2317 2318 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2319 ExprResult ActOnNumericConstant(const Token &Tok); 2320 ExprResult ActOnCharacterConstant(const Token &Tok); 2321 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *E); 2322 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2323 SourceLocation R, 2324 MultiExprArg Val); 2325 2326 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2327 /// fragments (e.g. "foo" "bar" L"baz"). 2328 ExprResult ActOnStringLiteral(const Token *StringToks, 2329 unsigned NumStringToks); 2330 2331 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2332 SourceLocation DefaultLoc, 2333 SourceLocation RParenLoc, 2334 Expr *ControllingExpr, 2335 MultiTypeArg ArgTypes, 2336 MultiExprArg ArgExprs); 2337 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2338 SourceLocation DefaultLoc, 2339 SourceLocation RParenLoc, 2340 Expr *ControllingExpr, 2341 TypeSourceInfo **Types, 2342 Expr **Exprs, 2343 unsigned NumAssocs); 2344 2345 // Binary/Unary Operators. 'Tok' is the token for the operator. 2346 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2347 Expr *InputExpr); 2348 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2349 UnaryOperatorKind Opc, Expr *Input); 2350 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2351 tok::TokenKind Op, Expr *Input); 2352 2353 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *TInfo, 2354 SourceLocation OpLoc, 2355 UnaryExprOrTypeTrait ExprKind, 2356 SourceRange R); 2357 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2358 UnaryExprOrTypeTrait ExprKind); 2359 ExprResult 2360 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2361 UnaryExprOrTypeTrait ExprKind, 2362 bool IsType, void *TyOrEx, 2363 const SourceRange &ArgRange); 2364 2365 ExprResult CheckPlaceholderExpr(Expr *E); 2366 bool CheckVecStepExpr(Expr *E); 2367 2368 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2369 bool CheckUnaryExprOrTypeTraitOperand(QualType ExprType, SourceLocation OpLoc, 2370 SourceRange ExprRange, 2371 UnaryExprOrTypeTrait ExprKind); 2372 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2373 SourceLocation OpLoc, 2374 IdentifierInfo &Name, 2375 SourceLocation NameLoc, 2376 SourceLocation RParenLoc); 2377 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2378 tok::TokenKind Kind, Expr *Input); 2379 2380 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2381 Expr *Idx, SourceLocation RLoc); 2382 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2383 Expr *Idx, SourceLocation RLoc); 2384 2385 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2386 SourceLocation OpLoc, bool IsArrow, 2387 CXXScopeSpec &SS, 2388 NamedDecl *FirstQualifierInScope, 2389 const DeclarationNameInfo &NameInfo, 2390 const TemplateArgumentListInfo *TemplateArgs); 2391 2392 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2393 SourceLocation OpLoc, bool IsArrow, 2394 const CXXScopeSpec &SS, 2395 NamedDecl *FirstQualifierInScope, 2396 LookupResult &R, 2397 const TemplateArgumentListInfo *TemplateArgs, 2398 bool SuppressQualifierCheck = false); 2399 2400 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2401 bool &IsArrow, SourceLocation OpLoc, 2402 CXXScopeSpec &SS, 2403 Decl *ObjCImpDecl, 2404 bool HasTemplateArgs); 2405 2406 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2407 const CXXScopeSpec &SS, 2408 const LookupResult &R); 2409 2410 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2411 bool IsArrow, SourceLocation OpLoc, 2412 const CXXScopeSpec &SS, 2413 NamedDecl *FirstQualifierInScope, 2414 const DeclarationNameInfo &NameInfo, 2415 const TemplateArgumentListInfo *TemplateArgs); 2416 2417 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2418 SourceLocation OpLoc, 2419 tok::TokenKind OpKind, 2420 CXXScopeSpec &SS, 2421 UnqualifiedId &Member, 2422 Decl *ObjCImpDecl, 2423 bool HasTrailingLParen); 2424 2425 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2426 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2427 FunctionDecl *FDecl, 2428 const FunctionProtoType *Proto, 2429 Expr **Args, unsigned NumArgs, 2430 SourceLocation RParenLoc); 2431 2432 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2433 /// This provides the location of the left/right parens and a list of comma 2434 /// locations. 2435 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2436 MultiExprArg ArgExprs, SourceLocation RParenLoc, 2437 Expr *ExecConfig = 0); 2438 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2439 SourceLocation LParenLoc, 2440 Expr **Args, unsigned NumArgs, 2441 SourceLocation RParenLoc, 2442 Expr *Config = 0); 2443 2444 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2445 MultiExprArg ExecConfig, 2446 SourceLocation GGGLoc); 2447 2448 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2449 Declarator &D, ParsedType &Ty, 2450 SourceLocation RParenLoc, Expr *CastExpr); 2451 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2452 TypeSourceInfo *Ty, 2453 SourceLocation RParenLoc, 2454 Expr *Op); 2455 2456 /// \brief Build an altivec or OpenCL literal. 2457 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2458 SourceLocation RParenLoc, Expr *E, 2459 TypeSourceInfo *TInfo); 2460 2461 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2462 2463 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2464 ParsedType Ty, 2465 SourceLocation RParenLoc, 2466 Expr *InitExpr); 2467 2468 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2469 TypeSourceInfo *TInfo, 2470 SourceLocation RParenLoc, 2471 Expr *LiteralExpr); 2472 2473 ExprResult ActOnInitList(SourceLocation LBraceLoc, 2474 MultiExprArg InitArgList, 2475 SourceLocation RBraceLoc); 2476 2477 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2478 SourceLocation Loc, 2479 bool GNUSyntax, 2480 ExprResult Init); 2481 2482 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2483 tok::TokenKind Kind, Expr *LHSExpr, Expr *RHSExpr); 2484 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2485 BinaryOperatorKind Opc, Expr *LHSExpr, Expr *RHSExpr); 2486 ExprResult CreateBuiltinBinOp(SourceLocation OpLoc, BinaryOperatorKind Opc, 2487 Expr *LHSExpr, Expr *RHSExpr); 2488 2489 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2490 /// in the case of a the GNU conditional expr extension. 2491 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2492 SourceLocation ColonLoc, 2493 Expr *CondExpr, Expr *LHSExpr, Expr *RHSExpr); 2494 2495 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2496 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2497 LabelDecl *TheDecl); 2498 2499 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2500 SourceLocation RPLoc); // "({..})" 2501 2502 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2503 struct OffsetOfComponent { 2504 SourceLocation LocStart, LocEnd; 2505 bool isBrackets; // true if [expr], false if .ident 2506 union { 2507 IdentifierInfo *IdentInfo; 2508 Expr *E; 2509 } U; 2510 }; 2511 2512 /// __builtin_offsetof(type, a.b[123][456].c) 2513 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2514 TypeSourceInfo *TInfo, 2515 OffsetOfComponent *CompPtr, 2516 unsigned NumComponents, 2517 SourceLocation RParenLoc); 2518 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2519 SourceLocation BuiltinLoc, 2520 SourceLocation TypeLoc, 2521 ParsedType ParsedArgTy, 2522 OffsetOfComponent *CompPtr, 2523 unsigned NumComponents, 2524 SourceLocation RParenLoc); 2525 2526 // __builtin_choose_expr(constExpr, expr1, expr2) 2527 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2528 Expr *CondExpr, Expr *LHSExpr, 2529 Expr *RHSExpr, SourceLocation RPLoc); 2530 2531 // __builtin_va_arg(expr, type) 2532 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, Expr *E, ParsedType Ty, 2533 SourceLocation RPLoc); 2534 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, Expr *E, 2535 TypeSourceInfo *TInfo, SourceLocation RPLoc); 2536 2537 // __null 2538 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2539 2540 bool CheckCaseExpression(Expr *E); 2541 2542 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2543 2544 //===------------------------- "Block" Extension ------------------------===// 2545 2546 /// ActOnBlockStart - This callback is invoked when a block literal is 2547 /// started. 2548 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2549 2550 /// ActOnBlockArguments - This callback allows processing of block arguments. 2551 /// If there are no arguments, this is still invoked. 2552 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2553 2554 /// ActOnBlockError - If there is an error parsing a block, this callback 2555 /// is invoked to pop the information about the block from the action impl. 2556 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2557 2558 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2559 /// literal was successfully completed. ^(int x){...} 2560 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, Stmt *Body, 2561 Scope *CurScope); 2562 2563 //===---------------------------- OpenCL Features -----------------------===// 2564 2565 /// __builtin_astype(...) 2566 ExprResult ActOnAsTypeExpr(Expr *E, ParsedType ParsedDestTy, 2567 SourceLocation BuiltinLoc, 2568 SourceLocation RParenLoc); 2569 2570 //===---------------------------- C++ Features --------------------------===// 2571 2572 // Act on C++ namespaces 2573 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2574 SourceLocation NamespaceLoc, 2575 SourceLocation IdentLoc, 2576 IdentifierInfo *Ident, 2577 SourceLocation LBrace, 2578 AttributeList *AttrList); 2579 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2580 2581 NamespaceDecl *getStdNamespace() const; 2582 NamespaceDecl *getOrCreateStdNamespace(); 2583 2584 CXXRecordDecl *getStdBadAlloc() const; 2585 2586 Decl *ActOnUsingDirective(Scope *CurScope, 2587 SourceLocation UsingLoc, 2588 SourceLocation NamespcLoc, 2589 CXXScopeSpec &SS, 2590 SourceLocation IdentLoc, 2591 IdentifierInfo *NamespcName, 2592 AttributeList *AttrList); 2593 2594 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2595 2596 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2597 SourceLocation NamespaceLoc, 2598 SourceLocation AliasLoc, 2599 IdentifierInfo *Alias, 2600 CXXScopeSpec &SS, 2601 SourceLocation IdentLoc, 2602 IdentifierInfo *Ident); 2603 2604 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2605 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2606 const LookupResult &PreviousDecls); 2607 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2608 NamedDecl *Target); 2609 2610 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2611 bool isTypeName, 2612 const CXXScopeSpec &SS, 2613 SourceLocation NameLoc, 2614 const LookupResult &Previous); 2615 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2616 const CXXScopeSpec &SS, 2617 SourceLocation NameLoc); 2618 2619 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2620 SourceLocation UsingLoc, 2621 CXXScopeSpec &SS, 2622 const DeclarationNameInfo &NameInfo, 2623 AttributeList *AttrList, 2624 bool IsInstantiation, 2625 bool IsTypeName, 2626 SourceLocation TypenameLoc); 2627 2628 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2629 2630 Decl *ActOnUsingDeclaration(Scope *CurScope, 2631 AccessSpecifier AS, 2632 bool HasUsingKeyword, 2633 SourceLocation UsingLoc, 2634 CXXScopeSpec &SS, 2635 UnqualifiedId &Name, 2636 AttributeList *AttrList, 2637 bool IsTypeName, 2638 SourceLocation TypenameLoc); 2639 Decl *ActOnAliasDeclaration(Scope *CurScope, 2640 AccessSpecifier AS, 2641 MultiTemplateParamsArg TemplateParams, 2642 SourceLocation UsingLoc, 2643 UnqualifiedId &Name, 2644 TypeResult Type); 2645 2646 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2647 /// ActOnDeclarator, when a C++ direct initializer is present. 2648 /// e.g: "int x(1);" 2649 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2650 SourceLocation LParenLoc, 2651 MultiExprArg Exprs, 2652 SourceLocation RParenLoc, 2653 bool TypeMayContainAuto); 2654 2655 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2656 /// and sets it as the initializer for the the passed in VarDecl. 2657 bool InitializeVarWithConstructor(VarDecl *VD, 2658 CXXConstructorDecl *Constructor, 2659 MultiExprArg Exprs); 2660 2661 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2662 /// including handling of its default argument expressions. 2663 /// 2664 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2665 ExprResult 2666 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2667 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2668 bool RequiresZeroInit, unsigned ConstructKind, 2669 SourceRange ParenRange); 2670 2671 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2672 // the constructor can be elidable? 2673 ExprResult 2674 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2675 CXXConstructorDecl *Constructor, bool Elidable, 2676 MultiExprArg Exprs, bool RequiresZeroInit, 2677 unsigned ConstructKind, 2678 SourceRange ParenRange); 2679 2680 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2681 /// the default expr if needed. 2682 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2683 FunctionDecl *FD, 2684 ParmVarDecl *Param); 2685 2686 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2687 /// constructed variable. 2688 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2689 2690 /// \brief Helper class that collects exception specifications for 2691 /// implicitly-declared special member functions. 2692 class ImplicitExceptionSpecification { 2693 // Pointer to allow copying 2694 ASTContext *Context; 2695 // We order exception specifications thus: 2696 // noexcept is the most restrictive, but is only used in C++0x. 2697 // throw() comes next. 2698 // Then a throw(collected exceptions) 2699 // Finally no specification. 2700 // throw(...) is used instead if any called function uses it. 2701 // 2702 // If this exception specification cannot be known yet (for instance, 2703 // because this is the exception specification for a defaulted default 2704 // constructor and we haven't finished parsing the deferred parts of the 2705 // class yet), the C++0x standard does not specify how to behave. We 2706 // record this as an 'unknown' exception specification, which overrules 2707 // any other specification (even 'none', to keep this rule simple). 2708 ExceptionSpecificationType ComputedEST; 2709 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2710 SmallVector<QualType, 4> Exceptions; 2711 2712 void ClearExceptions() { 2713 ExceptionsSeen.clear(); 2714 Exceptions.clear(); 2715 } 2716 2717 public: 2718 explicit ImplicitExceptionSpecification(ASTContext &Context) 2719 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2720 if (!Context.getLangOptions().CPlusPlus0x) 2721 ComputedEST = EST_DynamicNone; 2722 } 2723 2724 /// \brief Get the computed exception specification type. 2725 ExceptionSpecificationType getExceptionSpecType() const { 2726 assert(ComputedEST != EST_ComputedNoexcept && 2727 "noexcept(expr) should not be a possible result"); 2728 return ComputedEST; 2729 } 2730 2731 /// \brief The number of exceptions in the exception specification. 2732 unsigned size() const { return Exceptions.size(); } 2733 2734 /// \brief The set of exceptions in the exception specification. 2735 const QualType *data() const { return Exceptions.data(); } 2736 2737 /// \brief Integrate another called method into the collected data. 2738 void CalledDecl(CXXMethodDecl *Method); 2739 2740 /// \brief Integrate an invoked expression into the collected data. 2741 void CalledExpr(Expr *E); 2742 2743 /// \brief Specify that the exception specification can't be detemined yet. 2744 void SetDelayed() { 2745 ClearExceptions(); 2746 ComputedEST = EST_Delayed; 2747 } 2748 2749 FunctionProtoType::ExtProtoInfo getEPI() const { 2750 FunctionProtoType::ExtProtoInfo EPI; 2751 EPI.ExceptionSpecType = getExceptionSpecType(); 2752 EPI.NumExceptions = size(); 2753 EPI.Exceptions = data(); 2754 return EPI; 2755 } 2756 }; 2757 2758 /// \brief Determine what sort of exception specification a defaulted 2759 /// copy constructor of a class will have. 2760 ImplicitExceptionSpecification 2761 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2762 2763 /// \brief Determine what sort of exception specification a defaulted 2764 /// default constructor of a class will have, and whether the parameter 2765 /// will be const. 2766 std::pair<ImplicitExceptionSpecification, bool> 2767 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2768 2769 /// \brief Determine what sort of exception specification a defautled 2770 /// copy assignment operator of a class will have, and whether the 2771 /// parameter will be const. 2772 std::pair<ImplicitExceptionSpecification, bool> 2773 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2774 2775 /// \brief Determine what sort of exception specification a defaulted move 2776 /// constructor of a class will have. 2777 ImplicitExceptionSpecification 2778 ComputeDefaultedMoveCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2779 2780 /// \brief Determine what sort of exception specification a defaulted move 2781 /// assignment operator of a class will have. 2782 ImplicitExceptionSpecification 2783 ComputeDefaultedMoveAssignmentExceptionSpec(CXXRecordDecl *ClassDecl); 2784 2785 /// \brief Determine what sort of exception specification a defaulted 2786 /// destructor of a class will have. 2787 ImplicitExceptionSpecification 2788 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2789 2790 /// \brief Determine if a defaulted default constructor ought to be 2791 /// deleted. 2792 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2793 2794 /// \brief Determine if a defaulted copy constructor ought to be 2795 /// deleted. 2796 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2797 2798 /// \brief Determine if a defaulted copy assignment operator ought to be 2799 /// deleted. 2800 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2801 2802 /// \brief Determine if a defaulted move constructor ought to be deleted. 2803 bool ShouldDeleteMoveConstructor(CXXConstructorDecl *CD); 2804 2805 /// \brief Determine if a defaulted move assignment operator ought to be 2806 /// deleted. 2807 bool ShouldDeleteMoveAssignmentOperator(CXXMethodDecl *MD); 2808 2809 /// \brief Determine if a defaulted destructor ought to be deleted. 2810 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2811 2812 /// \brief Declare the implicit default constructor for the given class. 2813 /// 2814 /// \param ClassDecl The class declaration into which the implicit 2815 /// default constructor will be added. 2816 /// 2817 /// \returns The implicitly-declared default constructor. 2818 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2819 CXXRecordDecl *ClassDecl); 2820 2821 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2822 /// defining this constructor as the default constructor. 2823 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2824 CXXConstructorDecl *Constructor); 2825 2826 /// \brief Declare the implicit destructor for the given class. 2827 /// 2828 /// \param ClassDecl The class declaration into which the implicit 2829 /// destructor will be added. 2830 /// 2831 /// \returns The implicitly-declared destructor. 2832 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2833 2834 /// DefineImplicitDestructor - Checks for feasibility of 2835 /// defining this destructor as the default destructor. 2836 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2837 CXXDestructorDecl *Destructor); 2838 2839 /// \brief Build an exception spec for destructors that don't have one. 2840 /// 2841 /// C++11 says that user-defined destructors with no exception spec get one 2842 /// that looks as if the destructor was implicitly declared. 2843 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2844 CXXDestructorDecl *Destructor); 2845 2846 /// \brief Declare all inherited constructors for the given class. 2847 /// 2848 /// \param ClassDecl The class declaration into which the inherited 2849 /// constructors will be added. 2850 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2851 2852 /// \brief Declare the implicit copy constructor for the given class. 2853 /// 2854 /// \param ClassDecl The class declaration into which the implicit 2855 /// copy constructor will be added. 2856 /// 2857 /// \returns The implicitly-declared copy constructor. 2858 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2859 2860 /// DefineImplicitCopyConstructor - Checks for feasibility of 2861 /// defining this constructor as the copy constructor. 2862 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2863 CXXConstructorDecl *Constructor); 2864 2865 /// \brief Declare the implicit move constructor for the given class. 2866 /// 2867 /// \param ClassDecl The Class declaration into which the implicit 2868 /// move constructor will be added. 2869 /// 2870 /// \returns The implicitly-declared move constructor, or NULL if it wasn't 2871 /// declared. 2872 CXXConstructorDecl *DeclareImplicitMoveConstructor(CXXRecordDecl *ClassDecl); 2873 2874 /// DefineImplicitMoveConstructor - Checks for feasibility of 2875 /// defining this constructor as the move constructor. 2876 void DefineImplicitMoveConstructor(SourceLocation CurrentLocation, 2877 CXXConstructorDecl *Constructor); 2878 2879 /// \brief Declare the implicit copy assignment operator for the given class. 2880 /// 2881 /// \param ClassDecl The class declaration into which the implicit 2882 /// copy assignment operator will be added. 2883 /// 2884 /// \returns The implicitly-declared copy assignment operator. 2885 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2886 2887 /// \brief Defines an implicitly-declared copy assignment operator. 2888 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2889 CXXMethodDecl *MethodDecl); 2890 2891 /// \brief Declare the implicit move assignment operator for the given class. 2892 /// 2893 /// \param ClassDecl The Class declaration into which the implicit 2894 /// move assignment operator will be added. 2895 /// 2896 /// \returns The implicitly-declared move assignment operator, or NULL if it 2897 /// wasn't declared. 2898 CXXMethodDecl *DeclareImplicitMoveAssignment(CXXRecordDecl *ClassDecl); 2899 2900 /// \brief Defines an implicitly-declared move assignment operator. 2901 void DefineImplicitMoveAssignment(SourceLocation CurrentLocation, 2902 CXXMethodDecl *MethodDecl); 2903 2904 /// \brief Force the declaration of any implicitly-declared members of this 2905 /// class. 2906 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2907 2908 /// MaybeBindToTemporary - If the passed in expression has a record type with 2909 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2910 /// it simply returns the passed in expression. 2911 ExprResult MaybeBindToTemporary(Expr *E); 2912 2913 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2914 MultiExprArg ArgsPtr, 2915 SourceLocation Loc, 2916 ASTOwningVector<Expr*> &ConvertedArgs); 2917 2918 ParsedType getDestructorName(SourceLocation TildeLoc, 2919 IdentifierInfo &II, SourceLocation NameLoc, 2920 Scope *S, CXXScopeSpec &SS, 2921 ParsedType ObjectType, 2922 bool EnteringContext); 2923 2924 // Checks that reinterpret casts don't have undefined behavior. 2925 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2926 bool IsDereference, SourceRange Range); 2927 2928 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2929 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2930 tok::TokenKind Kind, 2931 SourceLocation LAngleBracketLoc, 2932 Declarator &D, 2933 SourceLocation RAngleBracketLoc, 2934 SourceLocation LParenLoc, 2935 Expr *E, 2936 SourceLocation RParenLoc); 2937 2938 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2939 tok::TokenKind Kind, 2940 TypeSourceInfo *Ty, 2941 Expr *E, 2942 SourceRange AngleBrackets, 2943 SourceRange Parens); 2944 2945 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2946 SourceLocation TypeidLoc, 2947 TypeSourceInfo *Operand, 2948 SourceLocation RParenLoc); 2949 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2950 SourceLocation TypeidLoc, 2951 Expr *Operand, 2952 SourceLocation RParenLoc); 2953 2954 /// ActOnCXXTypeid - Parse typeid( something ). 2955 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2956 SourceLocation LParenLoc, bool isType, 2957 void *TyOrExpr, 2958 SourceLocation RParenLoc); 2959 2960 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2961 SourceLocation TypeidLoc, 2962 TypeSourceInfo *Operand, 2963 SourceLocation RParenLoc); 2964 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2965 SourceLocation TypeidLoc, 2966 Expr *Operand, 2967 SourceLocation RParenLoc); 2968 2969 /// ActOnCXXUuidof - Parse __uuidof( something ). 2970 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2971 SourceLocation LParenLoc, bool isType, 2972 void *TyOrExpr, 2973 SourceLocation RParenLoc); 2974 2975 2976 //// ActOnCXXThis - Parse 'this' pointer. 2977 ExprResult ActOnCXXThis(SourceLocation loc); 2978 2979 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2980 /// the type of the 'this' pointer, or a null type if this is not possible. 2981 QualType getAndCaptureCurrentThisType(); 2982 2983 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2984 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2985 2986 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2987 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2988 2989 //// ActOnCXXThrow - Parse throw expressions. 2990 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2991 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2992 bool IsThrownVarInScope); 2993 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2994 bool IsThrownVarInScope); 2995 2996 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2997 /// Can be interpreted either as function-style casting ("int(x)") 2998 /// or class type construction ("ClassType(x,y,z)") 2999 /// or creation of a value-initialized type ("int()"). 3000 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 3001 SourceLocation LParenLoc, 3002 MultiExprArg Exprs, 3003 SourceLocation RParenLoc); 3004 3005 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 3006 SourceLocation LParenLoc, 3007 MultiExprArg Exprs, 3008 SourceLocation RParenLoc); 3009 3010 /// ActOnCXXNew - Parsed a C++ 'new' expression. 3011 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 3012 SourceLocation PlacementLParen, 3013 MultiExprArg PlacementArgs, 3014 SourceLocation PlacementRParen, 3015 SourceRange TypeIdParens, Declarator &D, 3016 SourceLocation ConstructorLParen, 3017 MultiExprArg ConstructorArgs, 3018 SourceLocation ConstructorRParen); 3019 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 3020 SourceLocation PlacementLParen, 3021 MultiExprArg PlacementArgs, 3022 SourceLocation PlacementRParen, 3023 SourceRange TypeIdParens, 3024 QualType AllocType, 3025 TypeSourceInfo *AllocTypeInfo, 3026 Expr *ArraySize, 3027 SourceLocation ConstructorLParen, 3028 MultiExprArg ConstructorArgs, 3029 SourceLocation ConstructorRParen, 3030 bool TypeMayContainAuto = true); 3031 3032 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 3033 SourceRange R); 3034 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 3035 bool UseGlobal, QualType AllocType, bool IsArray, 3036 Expr **PlaceArgs, unsigned NumPlaceArgs, 3037 FunctionDecl *&OperatorNew, 3038 FunctionDecl *&OperatorDelete); 3039 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 3040 DeclarationName Name, Expr** Args, 3041 unsigned NumArgs, DeclContext *Ctx, 3042 bool AllowMissing, FunctionDecl *&Operator, 3043 bool Diagnose = true); 3044 void DeclareGlobalNewDelete(); 3045 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 3046 QualType Argument, 3047 bool addMallocAttr = false); 3048 3049 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 3050 DeclarationName Name, FunctionDecl* &Operator, 3051 bool Diagnose = true); 3052 3053 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 3054 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 3055 bool UseGlobal, bool ArrayForm, 3056 Expr *Operand); 3057 3058 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 3059 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 3060 SourceLocation StmtLoc, 3061 bool ConvertToBoolean); 3062 3063 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 3064 Expr *Operand, SourceLocation RParen); 3065 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 3066 SourceLocation RParen); 3067 3068 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 3069 /// pseudo-functions. 3070 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 3071 SourceLocation KWLoc, 3072 ParsedType Ty, 3073 SourceLocation RParen); 3074 3075 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 3076 SourceLocation KWLoc, 3077 TypeSourceInfo *T, 3078 SourceLocation RParen); 3079 3080 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 3081 /// pseudo-functions. 3082 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 3083 SourceLocation KWLoc, 3084 ParsedType LhsTy, 3085 ParsedType RhsTy, 3086 SourceLocation RParen); 3087 3088 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 3089 SourceLocation KWLoc, 3090 TypeSourceInfo *LhsT, 3091 TypeSourceInfo *RhsT, 3092 SourceLocation RParen); 3093 3094 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3095 /// pseudo-functions. 3096 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3097 SourceLocation KWLoc, 3098 ParsedType LhsTy, 3099 Expr *DimExpr, 3100 SourceLocation RParen); 3101 3102 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3103 SourceLocation KWLoc, 3104 TypeSourceInfo *TSInfo, 3105 Expr *DimExpr, 3106 SourceLocation RParen); 3107 3108 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3109 /// pseudo-functions. 3110 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3111 SourceLocation KWLoc, 3112 Expr *Queried, 3113 SourceLocation RParen); 3114 3115 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3116 SourceLocation KWLoc, 3117 Expr *Queried, 3118 SourceLocation RParen); 3119 3120 ExprResult ActOnStartCXXMemberReference(Scope *S, 3121 Expr *Base, 3122 SourceLocation OpLoc, 3123 tok::TokenKind OpKind, 3124 ParsedType &ObjectType, 3125 bool &MayBePseudoDestructor); 3126 3127 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3128 3129 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3130 SourceLocation OpLoc, 3131 tok::TokenKind OpKind, 3132 const CXXScopeSpec &SS, 3133 TypeSourceInfo *ScopeType, 3134 SourceLocation CCLoc, 3135 SourceLocation TildeLoc, 3136 PseudoDestructorTypeStorage DestroyedType, 3137 bool HasTrailingLParen); 3138 3139 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3140 SourceLocation OpLoc, 3141 tok::TokenKind OpKind, 3142 CXXScopeSpec &SS, 3143 UnqualifiedId &FirstTypeName, 3144 SourceLocation CCLoc, 3145 SourceLocation TildeLoc, 3146 UnqualifiedId &SecondTypeName, 3147 bool HasTrailingLParen); 3148 3149 /// MaybeCreateExprWithCleanups - If the current full-expression 3150 /// requires any cleanups, surround it with a ExprWithCleanups node. 3151 /// Otherwise, just returns the passed-in expression. 3152 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3153 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3154 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3155 3156 ExprResult ActOnFinishFullExpr(Expr *Expr); 3157 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3158 3159 // Marks SS invalid if it represents an incomplete type. 3160 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3161 3162 DeclContext *computeDeclContext(QualType T); 3163 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3164 bool EnteringContext = false); 3165 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3166 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3167 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3168 3169 /// \brief The parser has parsed a global nested-name-specifier '::'. 3170 /// 3171 /// \param S The scope in which this nested-name-specifier occurs. 3172 /// 3173 /// \param CCLoc The location of the '::'. 3174 /// 3175 /// \param SS The nested-name-specifier, which will be updated in-place 3176 /// to reflect the parsed nested-name-specifier. 3177 /// 3178 /// \returns true if an error occurred, false otherwise. 3179 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3180 CXXScopeSpec &SS); 3181 3182 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3183 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3184 3185 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3186 SourceLocation IdLoc, 3187 IdentifierInfo &II, 3188 ParsedType ObjectType); 3189 3190 bool BuildCXXNestedNameSpecifier(Scope *S, 3191 IdentifierInfo &Identifier, 3192 SourceLocation IdentifierLoc, 3193 SourceLocation CCLoc, 3194 QualType ObjectType, 3195 bool EnteringContext, 3196 CXXScopeSpec &SS, 3197 NamedDecl *ScopeLookupResult, 3198 bool ErrorRecoveryLookup); 3199 3200 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3201 /// 3202 /// \param S The scope in which this nested-name-specifier occurs. 3203 /// 3204 /// \param Identifier The identifier preceding the '::'. 3205 /// 3206 /// \param IdentifierLoc The location of the identifier. 3207 /// 3208 /// \param CCLoc The location of the '::'. 3209 /// 3210 /// \param ObjectType The type of the object, if we're parsing 3211 /// nested-name-specifier in a member access expression. 3212 /// 3213 /// \param EnteringContext Whether we're entering the context nominated by 3214 /// this nested-name-specifier. 3215 /// 3216 /// \param SS The nested-name-specifier, which is both an input 3217 /// parameter (the nested-name-specifier before this type) and an 3218 /// output parameter (containing the full nested-name-specifier, 3219 /// including this new type). 3220 /// 3221 /// \returns true if an error occurred, false otherwise. 3222 bool ActOnCXXNestedNameSpecifier(Scope *S, 3223 IdentifierInfo &Identifier, 3224 SourceLocation IdentifierLoc, 3225 SourceLocation CCLoc, 3226 ParsedType ObjectType, 3227 bool EnteringContext, 3228 CXXScopeSpec &SS); 3229 3230 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3231 IdentifierInfo &Identifier, 3232 SourceLocation IdentifierLoc, 3233 SourceLocation ColonLoc, 3234 ParsedType ObjectType, 3235 bool EnteringContext); 3236 3237 /// \brief The parser has parsed a nested-name-specifier 3238 /// 'template[opt] template-name < template-args >::'. 3239 /// 3240 /// \param S The scope in which this nested-name-specifier occurs. 3241 /// 3242 /// \param TemplateLoc The location of the 'template' keyword, if any. 3243 /// 3244 /// \param SS The nested-name-specifier, which is both an input 3245 /// parameter (the nested-name-specifier before this type) and an 3246 /// output parameter (containing the full nested-name-specifier, 3247 /// including this new type). 3248 /// 3249 /// \param TemplateLoc the location of the 'template' keyword, if any. 3250 /// \param TemplateName The template name. 3251 /// \param TemplateNameLoc The location of the template name. 3252 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3253 /// \param TemplateArgs The template arguments. 3254 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3255 /// \param CCLoc The location of the '::'. 3256 3257 /// \param EnteringContext Whether we're entering the context of the 3258 /// nested-name-specifier. 3259 /// 3260 /// 3261 /// \returns true if an error occurred, false otherwise. 3262 bool ActOnCXXNestedNameSpecifier(Scope *S, 3263 SourceLocation TemplateLoc, 3264 CXXScopeSpec &SS, 3265 TemplateTy Template, 3266 SourceLocation TemplateNameLoc, 3267 SourceLocation LAngleLoc, 3268 ASTTemplateArgsPtr TemplateArgs, 3269 SourceLocation RAngleLoc, 3270 SourceLocation CCLoc, 3271 bool EnteringContext); 3272 3273 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3274 /// that the parser can use later to reconstruct the given 3275 /// nested-name-specifier. 3276 /// 3277 /// \param SS A nested-name-specifier. 3278 /// 3279 /// \returns A pointer containing all of the information in the 3280 /// nested-name-specifier \p SS. 3281 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3282 3283 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3284 /// the nested-name-specifier structure. 3285 /// 3286 /// \param Annotation The annotation pointer, produced by 3287 /// \c SaveNestedNameSpecifierAnnotation(). 3288 /// 3289 /// \param AnnotationRange The source range corresponding to the annotation. 3290 /// 3291 /// \param SS The nested-name-specifier that will be updated with the contents 3292 /// of the annotation pointer. 3293 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3294 SourceRange AnnotationRange, 3295 CXXScopeSpec &SS); 3296 3297 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3298 3299 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3300 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3301 /// After this method is called, according to [C++ 3.4.3p3], names should be 3302 /// looked up in the declarator-id's scope, until the declarator is parsed and 3303 /// ActOnCXXExitDeclaratorScope is called. 3304 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3305 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3306 3307 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3308 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3309 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3310 /// Used to indicate that names should revert to being looked up in the 3311 /// defining scope. 3312 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3313 3314 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3315 /// initializer for the declaration 'Dcl'. 3316 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3317 /// static data member of class X, names should be looked up in the scope of 3318 /// class X. 3319 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3320 3321 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3322 /// initializer for the declaration 'Dcl'. 3323 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3324 3325 // ParseObjCStringLiteral - Parse Objective-C string literals. 3326 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3327 Expr **Strings, 3328 unsigned NumStrings); 3329 3330 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3331 TypeSourceInfo *EncodedTypeInfo, 3332 SourceLocation RParenLoc); 3333 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3334 CXXMethodDecl *Method); 3335 3336 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3337 SourceLocation EncodeLoc, 3338 SourceLocation LParenLoc, 3339 ParsedType Ty, 3340 SourceLocation RParenLoc); 3341 3342 // ParseObjCSelectorExpression - Build selector expression for @selector 3343 ExprResult ParseObjCSelectorExpression(Selector Sel, 3344 SourceLocation AtLoc, 3345 SourceLocation SelLoc, 3346 SourceLocation LParenLoc, 3347 SourceLocation RParenLoc); 3348 3349 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3350 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3351 SourceLocation AtLoc, 3352 SourceLocation ProtoLoc, 3353 SourceLocation LParenLoc, 3354 SourceLocation RParenLoc); 3355 3356 //===--------------------------------------------------------------------===// 3357 // C++ Declarations 3358 // 3359 Decl *ActOnStartLinkageSpecification(Scope *S, 3360 SourceLocation ExternLoc, 3361 SourceLocation LangLoc, 3362 StringRef Lang, 3363 SourceLocation LBraceLoc); 3364 Decl *ActOnFinishLinkageSpecification(Scope *S, 3365 Decl *LinkageSpec, 3366 SourceLocation RBraceLoc); 3367 3368 3369 //===--------------------------------------------------------------------===// 3370 // C++ Classes 3371 // 3372 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3373 const CXXScopeSpec *SS = 0); 3374 3375 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3376 SourceLocation ASLoc, 3377 SourceLocation ColonLoc); 3378 3379 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3380 Declarator &D, 3381 MultiTemplateParamsArg TemplateParameterLists, 3382 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3383 Expr *Init, bool HasDeferredInit, 3384 bool IsDefinition); 3385 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3386 Expr *Init); 3387 3388 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3389 Scope *S, 3390 CXXScopeSpec &SS, 3391 IdentifierInfo *MemberOrBase, 3392 ParsedType TemplateTypeTy, 3393 SourceLocation IdLoc, 3394 SourceLocation LParenLoc, 3395 Expr **Args, unsigned NumArgs, 3396 SourceLocation RParenLoc, 3397 SourceLocation EllipsisLoc); 3398 3399 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3400 unsigned NumArgs, SourceLocation IdLoc, 3401 SourceLocation LParenLoc, 3402 SourceLocation RParenLoc); 3403 3404 MemInitResult BuildBaseInitializer(QualType BaseType, 3405 TypeSourceInfo *BaseTInfo, 3406 Expr **Args, unsigned NumArgs, 3407 SourceLocation LParenLoc, 3408 SourceLocation RParenLoc, 3409 CXXRecordDecl *ClassDecl, 3410 SourceLocation EllipsisLoc); 3411 3412 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3413 Expr **Args, unsigned NumArgs, 3414 SourceLocation BaseLoc, 3415 SourceLocation RParenLoc, 3416 SourceLocation LParenLoc, 3417 CXXRecordDecl *ClassDecl); 3418 3419 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3420 CXXCtorInitializer *Initializer); 3421 3422 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3423 CXXCtorInitializer **Initializers, 3424 unsigned NumInitializers, bool AnyErrors); 3425 3426 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3427 3428 3429 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3430 /// mark all the non-trivial destructors of its members and bases as 3431 /// referenced. 3432 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3433 CXXRecordDecl *Record); 3434 3435 /// \brief The list of classes whose vtables have been used within 3436 /// this translation unit, and the source locations at which the 3437 /// first use occurred. 3438 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3439 3440 /// \brief The list of vtables that are required but have not yet been 3441 /// materialized. 3442 SmallVector<VTableUse, 16> VTableUses; 3443 3444 /// \brief The set of classes whose vtables have been used within 3445 /// this translation unit, and a bit that will be true if the vtable is 3446 /// required to be emitted (otherwise, it should be emitted only if needed 3447 /// by code generation). 3448 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3449 3450 /// \brief Load any externally-stored vtable uses. 3451 void LoadExternalVTableUses(); 3452 3453 typedef LazyVector<CXXRecordDecl *, ExternalSemaSource, 3454 &ExternalSemaSource::ReadDynamicClasses, 2, 2> 3455 DynamicClassesType; 3456 3457 /// \brief A list of all of the dynamic classes in this translation 3458 /// unit. 3459 DynamicClassesType DynamicClasses; 3460 3461 /// \brief Note that the vtable for the given class was used at the 3462 /// given location. 3463 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3464 bool DefinitionRequired = false); 3465 3466 /// MarkVirtualMembersReferenced - Will mark all members of the given 3467 /// CXXRecordDecl referenced. 3468 void MarkVirtualMembersReferenced(SourceLocation Loc, 3469 const CXXRecordDecl *RD); 3470 3471 /// \brief Define all of the vtables that have been used in this 3472 /// translation unit and reference any virtual members used by those 3473 /// vtables. 3474 /// 3475 /// \returns true if any work was done, false otherwise. 3476 bool DefineUsedVTables(); 3477 3478 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3479 3480 void ActOnMemInitializers(Decl *ConstructorDecl, 3481 SourceLocation ColonLoc, 3482 CXXCtorInitializer **MemInits, 3483 unsigned NumMemInits, 3484 bool AnyErrors); 3485 3486 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3487 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3488 Decl *TagDecl, 3489 SourceLocation LBrac, 3490 SourceLocation RBrac, 3491 AttributeList *AttrList); 3492 3493 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3494 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3495 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3496 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3497 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3498 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3499 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3500 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3501 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3502 bool IsInsideALocalClassWithinATemplateFunction(); 3503 3504 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3505 Expr *AssertExpr, 3506 Expr *AssertMessageExpr, 3507 SourceLocation RParenLoc); 3508 3509 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3510 TypeSourceInfo *TSInfo); 3511 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3512 MultiTemplateParamsArg TemplateParams); 3513 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3514 MultiTemplateParamsArg TemplateParams); 3515 3516 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3517 StorageClass& SC); 3518 void CheckConstructor(CXXConstructorDecl *Constructor); 3519 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3520 StorageClass& SC); 3521 bool CheckDestructor(CXXDestructorDecl *Destructor); 3522 void CheckConversionDeclarator(Declarator &D, QualType &R, 3523 StorageClass& SC); 3524 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3525 3526 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3527 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3528 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3529 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3530 void CheckExplicitlyDefaultedMoveConstructor(CXXConstructorDecl *Ctor); 3531 void CheckExplicitlyDefaultedMoveAssignment(CXXMethodDecl *Method); 3532 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3533 3534 //===--------------------------------------------------------------------===// 3535 // C++ Derived Classes 3536 // 3537 3538 /// ActOnBaseSpecifier - Parsed a base specifier 3539 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3540 SourceRange SpecifierRange, 3541 bool Virtual, AccessSpecifier Access, 3542 TypeSourceInfo *TInfo, 3543 SourceLocation EllipsisLoc); 3544 3545 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3546 SourceRange SpecifierRange, 3547 bool Virtual, AccessSpecifier Access, 3548 ParsedType basetype, 3549 SourceLocation BaseLoc, 3550 SourceLocation EllipsisLoc); 3551 3552 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3553 unsigned NumBases); 3554 void ActOnBaseSpecifiers(Decl *ClassDecl, CXXBaseSpecifier **Bases, 3555 unsigned NumBases); 3556 3557 bool IsDerivedFrom(QualType Derived, QualType Base); 3558 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3559 3560 // FIXME: I don't like this name. 3561 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3562 3563 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3564 3565 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3566 SourceLocation Loc, SourceRange Range, 3567 CXXCastPath *BasePath = 0, 3568 bool IgnoreAccess = false); 3569 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3570 unsigned InaccessibleBaseID, 3571 unsigned AmbigiousBaseConvID, 3572 SourceLocation Loc, SourceRange Range, 3573 DeclarationName Name, 3574 CXXCastPath *BasePath); 3575 3576 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3577 3578 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3579 /// covariant, according to C++ [class.virtual]p5. 3580 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3581 const CXXMethodDecl *Old); 3582 3583 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3584 /// spec is a subset of base spec. 3585 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3586 const CXXMethodDecl *Old); 3587 3588 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3589 3590 /// CheckOverrideControl - Check C++0x override control semantics. 3591 void CheckOverrideControl(const Decl *D); 3592 3593 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3594 /// overrides a virtual member function marked 'final', according to 3595 /// C++0x [class.virtual]p3. 3596 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3597 const CXXMethodDecl *Old); 3598 3599 3600 //===--------------------------------------------------------------------===// 3601 // C++ Access Control 3602 // 3603 3604 enum AccessResult { 3605 AR_accessible, 3606 AR_inaccessible, 3607 AR_dependent, 3608 AR_delayed 3609 }; 3610 3611 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3612 NamedDecl *PrevMemberDecl, 3613 AccessSpecifier LexicalAS); 3614 3615 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3616 DeclAccessPair FoundDecl); 3617 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3618 DeclAccessPair FoundDecl); 3619 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3620 SourceRange PlacementRange, 3621 CXXRecordDecl *NamingClass, 3622 DeclAccessPair FoundDecl, 3623 bool Diagnose = true); 3624 AccessResult CheckConstructorAccess(SourceLocation Loc, 3625 CXXConstructorDecl *D, 3626 const InitializedEntity &Entity, 3627 AccessSpecifier Access, 3628 bool IsCopyBindingRefToTemp = false); 3629 AccessResult CheckConstructorAccess(SourceLocation Loc, 3630 CXXConstructorDecl *D, 3631 AccessSpecifier Access, 3632 PartialDiagnostic PD); 3633 AccessResult CheckDestructorAccess(SourceLocation Loc, 3634 CXXDestructorDecl *Dtor, 3635 const PartialDiagnostic &PDiag); 3636 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3637 NamedDecl *D, 3638 const PartialDiagnostic &PDiag); 3639 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3640 Expr *ObjectExpr, 3641 Expr *ArgExpr, 3642 DeclAccessPair FoundDecl); 3643 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3644 DeclAccessPair FoundDecl); 3645 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3646 QualType Base, QualType Derived, 3647 const CXXBasePath &Path, 3648 unsigned DiagID, 3649 bool ForceCheck = false, 3650 bool ForceUnprivileged = false); 3651 void CheckLookupAccess(const LookupResult &R); 3652 3653 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3654 const MultiLevelTemplateArgumentList &TemplateArgs); 3655 void PerformDependentDiagnostics(const DeclContext *Pattern, 3656 const MultiLevelTemplateArgumentList &TemplateArgs); 3657 3658 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3659 3660 /// A flag to suppress access checking. 3661 bool SuppressAccessChecking; 3662 3663 /// \brief When true, access checking violations are treated as SFINAE 3664 /// failures rather than hard errors. 3665 bool AccessCheckingSFINAE; 3666 3667 void ActOnStartSuppressingAccessChecks(); 3668 void ActOnStopSuppressingAccessChecks(); 3669 3670 enum AbstractDiagSelID { 3671 AbstractNone = -1, 3672 AbstractReturnType, 3673 AbstractParamType, 3674 AbstractVariableType, 3675 AbstractFieldType, 3676 AbstractArrayType 3677 }; 3678 3679 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3680 const PartialDiagnostic &PD); 3681 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3682 3683 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3684 AbstractDiagSelID SelID = AbstractNone); 3685 3686 //===--------------------------------------------------------------------===// 3687 // C++ Overloaded Operators [C++ 13.5] 3688 // 3689 3690 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3691 3692 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3693 3694 //===--------------------------------------------------------------------===// 3695 // C++ Templates [C++ 14] 3696 // 3697 void FilterAcceptableTemplateNames(LookupResult &R); 3698 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3699 3700 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3701 QualType ObjectType, bool EnteringContext, 3702 bool &MemberOfUnknownSpecialization); 3703 3704 TemplateNameKind isTemplateName(Scope *S, 3705 CXXScopeSpec &SS, 3706 bool hasTemplateKeyword, 3707 UnqualifiedId &Name, 3708 ParsedType ObjectType, 3709 bool EnteringContext, 3710 TemplateTy &Template, 3711 bool &MemberOfUnknownSpecialization); 3712 3713 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3714 SourceLocation IILoc, 3715 Scope *S, 3716 const CXXScopeSpec *SS, 3717 TemplateTy &SuggestedTemplate, 3718 TemplateNameKind &SuggestedKind); 3719 3720 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3721 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3722 3723 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3724 SourceLocation EllipsisLoc, 3725 SourceLocation KeyLoc, 3726 IdentifierInfo *ParamName, 3727 SourceLocation ParamNameLoc, 3728 unsigned Depth, unsigned Position, 3729 SourceLocation EqualLoc, 3730 ParsedType DefaultArg); 3731 3732 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3733 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3734 unsigned Depth, 3735 unsigned Position, 3736 SourceLocation EqualLoc, 3737 Expr *DefaultArg); 3738 Decl *ActOnTemplateTemplateParameter(Scope *S, 3739 SourceLocation TmpLoc, 3740 TemplateParameterList *Params, 3741 SourceLocation EllipsisLoc, 3742 IdentifierInfo *ParamName, 3743 SourceLocation ParamNameLoc, 3744 unsigned Depth, 3745 unsigned Position, 3746 SourceLocation EqualLoc, 3747 ParsedTemplateArgument DefaultArg); 3748 3749 TemplateParameterList * 3750 ActOnTemplateParameterList(unsigned Depth, 3751 SourceLocation ExportLoc, 3752 SourceLocation TemplateLoc, 3753 SourceLocation LAngleLoc, 3754 Decl **Params, unsigned NumParams, 3755 SourceLocation RAngleLoc); 3756 3757 /// \brief The context in which we are checking a template parameter 3758 /// list. 3759 enum TemplateParamListContext { 3760 TPC_ClassTemplate, 3761 TPC_FunctionTemplate, 3762 TPC_ClassTemplateMember, 3763 TPC_FriendFunctionTemplate, 3764 TPC_FriendFunctionTemplateDefinition, 3765 TPC_TypeAliasTemplate 3766 }; 3767 3768 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3769 TemplateParameterList *OldParams, 3770 TemplateParamListContext TPC); 3771 TemplateParameterList * 3772 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3773 SourceLocation DeclLoc, 3774 const CXXScopeSpec &SS, 3775 TemplateParameterList **ParamLists, 3776 unsigned NumParamLists, 3777 bool IsFriend, 3778 bool &IsExplicitSpecialization, 3779 bool &Invalid); 3780 3781 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3782 SourceLocation KWLoc, CXXScopeSpec &SS, 3783 IdentifierInfo *Name, SourceLocation NameLoc, 3784 AttributeList *Attr, 3785 TemplateParameterList *TemplateParams, 3786 AccessSpecifier AS, 3787 SourceLocation ModulePrivateLoc, 3788 unsigned NumOuterTemplateParamLists, 3789 TemplateParameterList **OuterTemplateParamLists); 3790 3791 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3792 TemplateArgumentListInfo &Out); 3793 3794 void NoteAllFoundTemplates(TemplateName Name); 3795 3796 QualType CheckTemplateIdType(TemplateName Template, 3797 SourceLocation TemplateLoc, 3798 TemplateArgumentListInfo &TemplateArgs); 3799 3800 TypeResult 3801 ActOnTemplateIdType(CXXScopeSpec &SS, 3802 TemplateTy Template, SourceLocation TemplateLoc, 3803 SourceLocation LAngleLoc, 3804 ASTTemplateArgsPtr TemplateArgs, 3805 SourceLocation RAngleLoc); 3806 3807 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3808 /// such as \c class T::template apply<U>. 3809 /// 3810 /// \param TUK 3811 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3812 TypeSpecifierType TagSpec, 3813 SourceLocation TagLoc, 3814 CXXScopeSpec &SS, 3815 TemplateTy TemplateD, 3816 SourceLocation TemplateLoc, 3817 SourceLocation LAngleLoc, 3818 ASTTemplateArgsPtr TemplateArgsIn, 3819 SourceLocation RAngleLoc); 3820 3821 3822 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3823 LookupResult &R, 3824 bool RequiresADL, 3825 const TemplateArgumentListInfo &TemplateArgs); 3826 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3827 const DeclarationNameInfo &NameInfo, 3828 const TemplateArgumentListInfo &TemplateArgs); 3829 3830 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3831 SourceLocation TemplateKWLoc, 3832 CXXScopeSpec &SS, 3833 UnqualifiedId &Name, 3834 ParsedType ObjectType, 3835 bool EnteringContext, 3836 TemplateTy &Template); 3837 3838 DeclResult 3839 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3840 SourceLocation KWLoc, 3841 SourceLocation ModulePrivateLoc, 3842 CXXScopeSpec &SS, 3843 TemplateTy Template, 3844 SourceLocation TemplateNameLoc, 3845 SourceLocation LAngleLoc, 3846 ASTTemplateArgsPtr TemplateArgs, 3847 SourceLocation RAngleLoc, 3848 AttributeList *Attr, 3849 MultiTemplateParamsArg TemplateParameterLists); 3850 3851 Decl *ActOnTemplateDeclarator(Scope *S, 3852 MultiTemplateParamsArg TemplateParameterLists, 3853 Declarator &D); 3854 3855 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3856 MultiTemplateParamsArg TemplateParameterLists, 3857 Declarator &D); 3858 3859 bool 3860 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3861 TemplateSpecializationKind NewTSK, 3862 NamedDecl *PrevDecl, 3863 TemplateSpecializationKind PrevTSK, 3864 SourceLocation PrevPtOfInstantiation, 3865 bool &SuppressNew); 3866 3867 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3868 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3869 LookupResult &Previous); 3870 3871 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3872 TemplateArgumentListInfo *ExplicitTemplateArgs, 3873 LookupResult &Previous); 3874 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3875 3876 DeclResult 3877 ActOnExplicitInstantiation(Scope *S, 3878 SourceLocation ExternLoc, 3879 SourceLocation TemplateLoc, 3880 unsigned TagSpec, 3881 SourceLocation KWLoc, 3882 const CXXScopeSpec &SS, 3883 TemplateTy Template, 3884 SourceLocation TemplateNameLoc, 3885 SourceLocation LAngleLoc, 3886 ASTTemplateArgsPtr TemplateArgs, 3887 SourceLocation RAngleLoc, 3888 AttributeList *Attr); 3889 3890 DeclResult 3891 ActOnExplicitInstantiation(Scope *S, 3892 SourceLocation ExternLoc, 3893 SourceLocation TemplateLoc, 3894 unsigned TagSpec, 3895 SourceLocation KWLoc, 3896 CXXScopeSpec &SS, 3897 IdentifierInfo *Name, 3898 SourceLocation NameLoc, 3899 AttributeList *Attr); 3900 3901 DeclResult ActOnExplicitInstantiation(Scope *S, 3902 SourceLocation ExternLoc, 3903 SourceLocation TemplateLoc, 3904 Declarator &D); 3905 3906 TemplateArgumentLoc 3907 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3908 SourceLocation TemplateLoc, 3909 SourceLocation RAngleLoc, 3910 Decl *Param, 3911 SmallVectorImpl<TemplateArgument> &Converted); 3912 3913 /// \brief Specifies the context in which a particular template 3914 /// argument is being checked. 3915 enum CheckTemplateArgumentKind { 3916 /// \brief The template argument was specified in the code or was 3917 /// instantiated with some deduced template arguments. 3918 CTAK_Specified, 3919 3920 /// \brief The template argument was deduced via template argument 3921 /// deduction. 3922 CTAK_Deduced, 3923 3924 /// \brief The template argument was deduced from an array bound 3925 /// via template argument deduction. 3926 CTAK_DeducedFromArrayBound 3927 }; 3928 3929 bool CheckTemplateArgument(NamedDecl *Param, 3930 const TemplateArgumentLoc &Arg, 3931 NamedDecl *Template, 3932 SourceLocation TemplateLoc, 3933 SourceLocation RAngleLoc, 3934 unsigned ArgumentPackIndex, 3935 SmallVectorImpl<TemplateArgument> &Converted, 3936 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3937 3938 /// \brief Check that the given template arguments can be be provided to 3939 /// the given template, converting the arguments along the way. 3940 /// 3941 /// \param Template The template to which the template arguments are being 3942 /// provided. 3943 /// 3944 /// \param TemplateLoc The location of the template name in the source. 3945 /// 3946 /// \param TemplateArgs The list of template arguments. If the template is 3947 /// a template template parameter, this function may extend the set of 3948 /// template arguments to also include substituted, defaulted template 3949 /// arguments. 3950 /// 3951 /// \param PartialTemplateArgs True if the list of template arguments is 3952 /// intentionally partial, e.g., because we're checking just the initial 3953 /// set of template arguments. 3954 /// 3955 /// \param Converted Will receive the converted, canonicalized template 3956 /// arguments. 3957 /// 3958 /// \returns True if an error occurred, false otherwise. 3959 bool CheckTemplateArgumentList(TemplateDecl *Template, 3960 SourceLocation TemplateLoc, 3961 TemplateArgumentListInfo &TemplateArgs, 3962 bool PartialTemplateArgs, 3963 SmallVectorImpl<TemplateArgument> &Converted); 3964 3965 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3966 const TemplateArgumentLoc &Arg, 3967 SmallVectorImpl<TemplateArgument> &Converted); 3968 3969 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3970 TypeSourceInfo *Arg); 3971 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3972 TemplateArgument &Converted); 3973 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3974 QualType InstantiatedParamType, Expr *Arg, 3975 TemplateArgument &Converted, 3976 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3977 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3978 const TemplateArgumentLoc &Arg); 3979 3980 ExprResult 3981 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3982 QualType ParamType, 3983 SourceLocation Loc); 3984 ExprResult 3985 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3986 SourceLocation Loc); 3987 3988 /// \brief Enumeration describing how template parameter lists are compared 3989 /// for equality. 3990 enum TemplateParameterListEqualKind { 3991 /// \brief We are matching the template parameter lists of two templates 3992 /// that might be redeclarations. 3993 /// 3994 /// \code 3995 /// template<typename T> struct X; 3996 /// template<typename T> struct X; 3997 /// \endcode 3998 TPL_TemplateMatch, 3999 4000 /// \brief We are matching the template parameter lists of two template 4001 /// template parameters as part of matching the template parameter lists 4002 /// of two templates that might be redeclarations. 4003 /// 4004 /// \code 4005 /// template<template<int I> class TT> struct X; 4006 /// template<template<int Value> class Other> struct X; 4007 /// \endcode 4008 TPL_TemplateTemplateParmMatch, 4009 4010 /// \brief We are matching the template parameter lists of a template 4011 /// template argument against the template parameter lists of a template 4012 /// template parameter. 4013 /// 4014 /// \code 4015 /// template<template<int Value> class Metafun> struct X; 4016 /// template<int Value> struct integer_c; 4017 /// X<integer_c> xic; 4018 /// \endcode 4019 TPL_TemplateTemplateArgumentMatch 4020 }; 4021 4022 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 4023 TemplateParameterList *Old, 4024 bool Complain, 4025 TemplateParameterListEqualKind Kind, 4026 SourceLocation TemplateArgLoc 4027 = SourceLocation()); 4028 4029 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 4030 4031 /// \brief Called when the parser has parsed a C++ typename 4032 /// specifier, e.g., "typename T::type". 4033 /// 4034 /// \param S The scope in which this typename type occurs. 4035 /// \param TypenameLoc the location of the 'typename' keyword 4036 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4037 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 4038 /// \param IdLoc the location of the identifier. 4039 TypeResult 4040 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4041 const CXXScopeSpec &SS, const IdentifierInfo &II, 4042 SourceLocation IdLoc); 4043 4044 /// \brief Called when the parser has parsed a C++ typename 4045 /// specifier that ends in a template-id, e.g., 4046 /// "typename MetaFun::template apply<T1, T2>". 4047 /// 4048 /// \param S The scope in which this typename type occurs. 4049 /// \param TypenameLoc the location of the 'typename' keyword 4050 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 4051 /// \param TemplateLoc the location of the 'template' keyword, if any. 4052 /// \param TemplateName The template name. 4053 /// \param TemplateNameLoc The location of the template name. 4054 /// \param LAngleLoc The location of the opening angle bracket ('<'). 4055 /// \param TemplateArgs The template arguments. 4056 /// \param RAngleLoc The location of the closing angle bracket ('>'). 4057 TypeResult 4058 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 4059 const CXXScopeSpec &SS, 4060 SourceLocation TemplateLoc, 4061 TemplateTy Template, 4062 SourceLocation TemplateNameLoc, 4063 SourceLocation LAngleLoc, 4064 ASTTemplateArgsPtr TemplateArgs, 4065 SourceLocation RAngleLoc); 4066 4067 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 4068 SourceLocation KeywordLoc, 4069 NestedNameSpecifierLoc QualifierLoc, 4070 const IdentifierInfo &II, 4071 SourceLocation IILoc); 4072 4073 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 4074 SourceLocation Loc, 4075 DeclarationName Name); 4076 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 4077 4078 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 4079 4080 std::string 4081 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4082 const TemplateArgumentList &Args); 4083 4084 std::string 4085 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 4086 const TemplateArgument *Args, 4087 unsigned NumArgs); 4088 4089 //===--------------------------------------------------------------------===// 4090 // C++ Variadic Templates (C++0x [temp.variadic]) 4091 //===--------------------------------------------------------------------===// 4092 4093 /// \brief The context in which an unexpanded parameter pack is 4094 /// being diagnosed. 4095 /// 4096 /// Note that the values of this enumeration line up with the first 4097 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 4098 enum UnexpandedParameterPackContext { 4099 /// \brief An arbitrary expression. 4100 UPPC_Expression = 0, 4101 4102 /// \brief The base type of a class type. 4103 UPPC_BaseType, 4104 4105 /// \brief The type of an arbitrary declaration. 4106 UPPC_DeclarationType, 4107 4108 /// \brief The type of a data member. 4109 UPPC_DataMemberType, 4110 4111 /// \brief The size of a bit-field. 4112 UPPC_BitFieldWidth, 4113 4114 /// \brief The expression in a static assertion. 4115 UPPC_StaticAssertExpression, 4116 4117 /// \brief The fixed underlying type of an enumeration. 4118 UPPC_FixedUnderlyingType, 4119 4120 /// \brief The enumerator value. 4121 UPPC_EnumeratorValue, 4122 4123 /// \brief A using declaration. 4124 UPPC_UsingDeclaration, 4125 4126 /// \brief A friend declaration. 4127 UPPC_FriendDeclaration, 4128 4129 /// \brief A declaration qualifier. 4130 UPPC_DeclarationQualifier, 4131 4132 /// \brief An initializer. 4133 UPPC_Initializer, 4134 4135 /// \brief A default argument. 4136 UPPC_DefaultArgument, 4137 4138 /// \brief The type of a non-type template parameter. 4139 UPPC_NonTypeTemplateParameterType, 4140 4141 /// \brief The type of an exception. 4142 UPPC_ExceptionType, 4143 4144 /// \brief Partial specialization. 4145 UPPC_PartialSpecialization 4146 }; 4147 4148 /// \brief If the given type contains an unexpanded parameter pack, 4149 /// diagnose the error. 4150 /// 4151 /// \param Loc The source location where a diagnostc should be emitted. 4152 /// 4153 /// \param T The type that is being checked for unexpanded parameter 4154 /// packs. 4155 /// 4156 /// \returns true if an error occurred, false otherwise. 4157 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4158 UnexpandedParameterPackContext UPPC); 4159 4160 /// \brief If the given expression contains an unexpanded parameter 4161 /// pack, diagnose the error. 4162 /// 4163 /// \param E The expression that is being checked for unexpanded 4164 /// parameter packs. 4165 /// 4166 /// \returns true if an error occurred, false otherwise. 4167 bool DiagnoseUnexpandedParameterPack(Expr *E, 4168 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4169 4170 /// \brief If the given nested-name-specifier contains an unexpanded 4171 /// parameter pack, diagnose the error. 4172 /// 4173 /// \param SS The nested-name-specifier that is being checked for 4174 /// unexpanded parameter packs. 4175 /// 4176 /// \returns true if an error occurred, false otherwise. 4177 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4178 UnexpandedParameterPackContext UPPC); 4179 4180 /// \brief If the given name contains an unexpanded parameter pack, 4181 /// diagnose the error. 4182 /// 4183 /// \param NameInfo The name (with source location information) that 4184 /// is being checked for unexpanded parameter packs. 4185 /// 4186 /// \returns true if an error occurred, false otherwise. 4187 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4188 UnexpandedParameterPackContext UPPC); 4189 4190 /// \brief If the given template name contains an unexpanded parameter pack, 4191 /// diagnose the error. 4192 /// 4193 /// \param Loc The location of the template name. 4194 /// 4195 /// \param Template The template name that is being checked for unexpanded 4196 /// parameter packs. 4197 /// 4198 /// \returns true if an error occurred, false otherwise. 4199 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4200 TemplateName Template, 4201 UnexpandedParameterPackContext UPPC); 4202 4203 /// \brief If the given template argument contains an unexpanded parameter 4204 /// pack, diagnose the error. 4205 /// 4206 /// \param Arg The template argument that is being checked for unexpanded 4207 /// parameter packs. 4208 /// 4209 /// \returns true if an error occurred, false otherwise. 4210 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4211 UnexpandedParameterPackContext UPPC); 4212 4213 /// \brief Collect the set of unexpanded parameter packs within the given 4214 /// template argument. 4215 /// 4216 /// \param Arg The template argument that will be traversed to find 4217 /// unexpanded parameter packs. 4218 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4219 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4220 4221 /// \brief Collect the set of unexpanded parameter packs within the given 4222 /// template argument. 4223 /// 4224 /// \param Arg The template argument that will be traversed to find 4225 /// unexpanded parameter packs. 4226 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4227 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4228 4229 /// \brief Collect the set of unexpanded parameter packs within the given 4230 /// type. 4231 /// 4232 /// \param T The type that will be traversed to find 4233 /// unexpanded parameter packs. 4234 void collectUnexpandedParameterPacks(QualType T, 4235 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4236 4237 /// \brief Collect the set of unexpanded parameter packs within the given 4238 /// type. 4239 /// 4240 /// \param TL The type that will be traversed to find 4241 /// unexpanded parameter packs. 4242 void collectUnexpandedParameterPacks(TypeLoc TL, 4243 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4244 4245 /// \brief Invoked when parsing a template argument followed by an 4246 /// ellipsis, which creates a pack expansion. 4247 /// 4248 /// \param Arg The template argument preceding the ellipsis, which 4249 /// may already be invalid. 4250 /// 4251 /// \param EllipsisLoc The location of the ellipsis. 4252 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4253 SourceLocation EllipsisLoc); 4254 4255 /// \brief Invoked when parsing a type followed by an ellipsis, which 4256 /// creates a pack expansion. 4257 /// 4258 /// \param Type The type preceding the ellipsis, which will become 4259 /// the pattern of the pack expansion. 4260 /// 4261 /// \param EllipsisLoc The location of the ellipsis. 4262 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4263 4264 /// \brief Construct a pack expansion type from the pattern of the pack 4265 /// expansion. 4266 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4267 SourceLocation EllipsisLoc, 4268 llvm::Optional<unsigned> NumExpansions); 4269 4270 /// \brief Construct a pack expansion type from the pattern of the pack 4271 /// expansion. 4272 QualType CheckPackExpansion(QualType Pattern, 4273 SourceRange PatternRange, 4274 SourceLocation EllipsisLoc, 4275 llvm::Optional<unsigned> NumExpansions); 4276 4277 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4278 /// creates a pack expansion. 4279 /// 4280 /// \param Pattern The expression preceding the ellipsis, which will become 4281 /// the pattern of the pack expansion. 4282 /// 4283 /// \param EllipsisLoc The location of the ellipsis. 4284 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4285 4286 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4287 /// creates a pack expansion. 4288 /// 4289 /// \param Pattern The expression preceding the ellipsis, which will become 4290 /// the pattern of the pack expansion. 4291 /// 4292 /// \param EllipsisLoc The location of the ellipsis. 4293 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4294 llvm::Optional<unsigned> NumExpansions); 4295 4296 /// \brief Determine whether we could expand a pack expansion with the 4297 /// given set of parameter packs into separate arguments by repeatedly 4298 /// transforming the pattern. 4299 /// 4300 /// \param EllipsisLoc The location of the ellipsis that identifies the 4301 /// pack expansion. 4302 /// 4303 /// \param PatternRange The source range that covers the entire pattern of 4304 /// the pack expansion. 4305 /// 4306 /// \param Unexpanded The set of unexpanded parameter packs within the 4307 /// pattern. 4308 /// 4309 /// \param NumUnexpanded The number of unexpanded parameter packs in 4310 /// \p Unexpanded. 4311 /// 4312 /// \param ShouldExpand Will be set to \c true if the transformer should 4313 /// expand the corresponding pack expansions into separate arguments. When 4314 /// set, \c NumExpansions must also be set. 4315 /// 4316 /// \param RetainExpansion Whether the caller should add an unexpanded 4317 /// pack expansion after all of the expanded arguments. This is used 4318 /// when extending explicitly-specified template argument packs per 4319 /// C++0x [temp.arg.explicit]p9. 4320 /// 4321 /// \param NumExpansions The number of separate arguments that will be in 4322 /// the expanded form of the corresponding pack expansion. This is both an 4323 /// input and an output parameter, which can be set by the caller if the 4324 /// number of expansions is known a priori (e.g., due to a prior substitution) 4325 /// and will be set by the callee when the number of expansions is known. 4326 /// The callee must set this value when \c ShouldExpand is \c true; it may 4327 /// set this value in other cases. 4328 /// 4329 /// \returns true if an error occurred (e.g., because the parameter packs 4330 /// are to be instantiated with arguments of different lengths), false 4331 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4332 /// must be set. 4333 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4334 SourceRange PatternRange, 4335 const UnexpandedParameterPack *Unexpanded, 4336 unsigned NumUnexpanded, 4337 const MultiLevelTemplateArgumentList &TemplateArgs, 4338 bool &ShouldExpand, 4339 bool &RetainExpansion, 4340 llvm::Optional<unsigned> &NumExpansions); 4341 4342 /// \brief Determine the number of arguments in the given pack expansion 4343 /// type. 4344 /// 4345 /// This routine already assumes that the pack expansion type can be 4346 /// expanded and that the number of arguments in the expansion is 4347 /// consistent across all of the unexpanded parameter packs in its pattern. 4348 unsigned getNumArgumentsInExpansion(QualType T, 4349 const MultiLevelTemplateArgumentList &TemplateArgs); 4350 4351 /// \brief Determine whether the given declarator contains any unexpanded 4352 /// parameter packs. 4353 /// 4354 /// This routine is used by the parser to disambiguate function declarators 4355 /// with an ellipsis prior to the ')', e.g., 4356 /// 4357 /// \code 4358 /// void f(T...); 4359 /// \endcode 4360 /// 4361 /// To determine whether we have an (unnamed) function parameter pack or 4362 /// a variadic function. 4363 /// 4364 /// \returns true if the declarator contains any unexpanded parameter packs, 4365 /// false otherwise. 4366 bool containsUnexpandedParameterPacks(Declarator &D); 4367 4368 //===--------------------------------------------------------------------===// 4369 // C++ Template Argument Deduction (C++ [temp.deduct]) 4370 //===--------------------------------------------------------------------===// 4371 4372 /// \brief Describes the result of template argument deduction. 4373 /// 4374 /// The TemplateDeductionResult enumeration describes the result of 4375 /// template argument deduction, as returned from 4376 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4377 /// structure provides additional information about the results of 4378 /// template argument deduction, e.g., the deduced template argument 4379 /// list (if successful) or the specific template parameters or 4380 /// deduced arguments that were involved in the failure. 4381 enum TemplateDeductionResult { 4382 /// \brief Template argument deduction was successful. 4383 TDK_Success = 0, 4384 /// \brief Template argument deduction exceeded the maximum template 4385 /// instantiation depth (which has already been diagnosed). 4386 TDK_InstantiationDepth, 4387 /// \brief Template argument deduction did not deduce a value 4388 /// for every template parameter. 4389 TDK_Incomplete, 4390 /// \brief Template argument deduction produced inconsistent 4391 /// deduced values for the given template parameter. 4392 TDK_Inconsistent, 4393 /// \brief Template argument deduction failed due to inconsistent 4394 /// cv-qualifiers on a template parameter type that would 4395 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4396 /// but were given a non-const "X". 4397 TDK_Underqualified, 4398 /// \brief Substitution of the deduced template argument values 4399 /// resulted in an error. 4400 TDK_SubstitutionFailure, 4401 /// \brief Substitution of the deduced template argument values 4402 /// into a non-deduced context produced a type or value that 4403 /// produces a type that does not match the original template 4404 /// arguments provided. 4405 TDK_NonDeducedMismatch, 4406 /// \brief When performing template argument deduction for a function 4407 /// template, there were too many call arguments. 4408 TDK_TooManyArguments, 4409 /// \brief When performing template argument deduction for a function 4410 /// template, there were too few call arguments. 4411 TDK_TooFewArguments, 4412 /// \brief The explicitly-specified template arguments were not valid 4413 /// template arguments for the given template. 4414 TDK_InvalidExplicitArguments, 4415 /// \brief The arguments included an overloaded function name that could 4416 /// not be resolved to a suitable function. 4417 TDK_FailedOverloadResolution 4418 }; 4419 4420 TemplateDeductionResult 4421 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4422 const TemplateArgumentList &TemplateArgs, 4423 sema::TemplateDeductionInfo &Info); 4424 4425 TemplateDeductionResult 4426 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4427 TemplateArgumentListInfo &ExplicitTemplateArgs, 4428 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4429 SmallVectorImpl<QualType> &ParamTypes, 4430 QualType *FunctionType, 4431 sema::TemplateDeductionInfo &Info); 4432 4433 /// brief A function argument from which we performed template argument 4434 // deduction for a call. 4435 struct OriginalCallArg { 4436 OriginalCallArg(QualType OriginalParamType, 4437 unsigned ArgIdx, 4438 QualType OriginalArgType) 4439 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4440 OriginalArgType(OriginalArgType) { } 4441 4442 QualType OriginalParamType; 4443 unsigned ArgIdx; 4444 QualType OriginalArgType; 4445 }; 4446 4447 TemplateDeductionResult 4448 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4449 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4450 unsigned NumExplicitlySpecified, 4451 FunctionDecl *&Specialization, 4452 sema::TemplateDeductionInfo &Info, 4453 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4454 4455 TemplateDeductionResult 4456 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4457 TemplateArgumentListInfo *ExplicitTemplateArgs, 4458 Expr **Args, unsigned NumArgs, 4459 FunctionDecl *&Specialization, 4460 sema::TemplateDeductionInfo &Info); 4461 4462 TemplateDeductionResult 4463 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4464 TemplateArgumentListInfo *ExplicitTemplateArgs, 4465 QualType ArgFunctionType, 4466 FunctionDecl *&Specialization, 4467 sema::TemplateDeductionInfo &Info); 4468 4469 TemplateDeductionResult 4470 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4471 QualType ToType, 4472 CXXConversionDecl *&Specialization, 4473 sema::TemplateDeductionInfo &Info); 4474 4475 TemplateDeductionResult 4476 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4477 TemplateArgumentListInfo *ExplicitTemplateArgs, 4478 FunctionDecl *&Specialization, 4479 sema::TemplateDeductionInfo &Info); 4480 4481 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4482 TypeSourceInfo *&Result); 4483 4484 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4485 FunctionTemplateDecl *FT2, 4486 SourceLocation Loc, 4487 TemplatePartialOrderingContext TPOC, 4488 unsigned NumCallArguments); 4489 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4490 UnresolvedSetIterator SEnd, 4491 TemplatePartialOrderingContext TPOC, 4492 unsigned NumCallArguments, 4493 SourceLocation Loc, 4494 const PartialDiagnostic &NoneDiag, 4495 const PartialDiagnostic &AmbigDiag, 4496 const PartialDiagnostic &CandidateDiag, 4497 bool Complain = true); 4498 4499 ClassTemplatePartialSpecializationDecl * 4500 getMoreSpecializedPartialSpecialization( 4501 ClassTemplatePartialSpecializationDecl *PS1, 4502 ClassTemplatePartialSpecializationDecl *PS2, 4503 SourceLocation Loc); 4504 4505 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4506 bool OnlyDeduced, 4507 unsigned Depth, 4508 SmallVectorImpl<bool> &Used); 4509 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4510 SmallVectorImpl<bool> &Deduced); 4511 4512 //===--------------------------------------------------------------------===// 4513 // C++ Template Instantiation 4514 // 4515 4516 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4517 const TemplateArgumentList *Innermost = 0, 4518 bool RelativeToPrimary = false, 4519 const FunctionDecl *Pattern = 0); 4520 4521 /// \brief A template instantiation that is currently in progress. 4522 struct ActiveTemplateInstantiation { 4523 /// \brief The kind of template instantiation we are performing 4524 enum InstantiationKind { 4525 /// We are instantiating a template declaration. The entity is 4526 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4527 TemplateInstantiation, 4528 4529 /// We are instantiating a default argument for a template 4530 /// parameter. The Entity is the template, and 4531 /// TemplateArgs/NumTemplateArguments provides the template 4532 /// arguments as specified. 4533 /// FIXME: Use a TemplateArgumentList 4534 DefaultTemplateArgumentInstantiation, 4535 4536 /// We are instantiating a default argument for a function. 4537 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4538 /// provides the template arguments as specified. 4539 DefaultFunctionArgumentInstantiation, 4540 4541 /// We are substituting explicit template arguments provided for 4542 /// a function template. The entity is a FunctionTemplateDecl. 4543 ExplicitTemplateArgumentSubstitution, 4544 4545 /// We are substituting template argument determined as part of 4546 /// template argument deduction for either a class template 4547 /// partial specialization or a function template. The 4548 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4549 /// a FunctionTemplateDecl. 4550 DeducedTemplateArgumentSubstitution, 4551 4552 /// We are substituting prior template arguments into a new 4553 /// template parameter. The template parameter itself is either a 4554 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4555 PriorTemplateArgumentSubstitution, 4556 4557 /// We are checking the validity of a default template argument that 4558 /// has been used when naming a template-id. 4559 DefaultTemplateArgumentChecking 4560 } Kind; 4561 4562 /// \brief The point of instantiation within the source code. 4563 SourceLocation PointOfInstantiation; 4564 4565 /// \brief The template (or partial specialization) in which we are 4566 /// performing the instantiation, for substitutions of prior template 4567 /// arguments. 4568 NamedDecl *Template; 4569 4570 /// \brief The entity that is being instantiated. 4571 uintptr_t Entity; 4572 4573 /// \brief The list of template arguments we are substituting, if they 4574 /// are not part of the entity. 4575 const TemplateArgument *TemplateArgs; 4576 4577 /// \brief The number of template arguments in TemplateArgs. 4578 unsigned NumTemplateArgs; 4579 4580 /// \brief The template deduction info object associated with the 4581 /// substitution or checking of explicit or deduced template arguments. 4582 sema::TemplateDeductionInfo *DeductionInfo; 4583 4584 /// \brief The source range that covers the construct that cause 4585 /// the instantiation, e.g., the template-id that causes a class 4586 /// template instantiation. 4587 SourceRange InstantiationRange; 4588 4589 ActiveTemplateInstantiation() 4590 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4591 NumTemplateArgs(0), DeductionInfo(0) {} 4592 4593 /// \brief Determines whether this template is an actual instantiation 4594 /// that should be counted toward the maximum instantiation depth. 4595 bool isInstantiationRecord() const; 4596 4597 friend bool operator==(const ActiveTemplateInstantiation &X, 4598 const ActiveTemplateInstantiation &Y) { 4599 if (X.Kind != Y.Kind) 4600 return false; 4601 4602 if (X.Entity != Y.Entity) 4603 return false; 4604 4605 switch (X.Kind) { 4606 case TemplateInstantiation: 4607 return true; 4608 4609 case PriorTemplateArgumentSubstitution: 4610 case DefaultTemplateArgumentChecking: 4611 if (X.Template != Y.Template) 4612 return false; 4613 4614 // Fall through 4615 4616 case DefaultTemplateArgumentInstantiation: 4617 case ExplicitTemplateArgumentSubstitution: 4618 case DeducedTemplateArgumentSubstitution: 4619 case DefaultFunctionArgumentInstantiation: 4620 return X.TemplateArgs == Y.TemplateArgs; 4621 4622 } 4623 4624 return true; 4625 } 4626 4627 friend bool operator!=(const ActiveTemplateInstantiation &X, 4628 const ActiveTemplateInstantiation &Y) { 4629 return !(X == Y); 4630 } 4631 }; 4632 4633 /// \brief List of active template instantiations. 4634 /// 4635 /// This vector is treated as a stack. As one template instantiation 4636 /// requires another template instantiation, additional 4637 /// instantiations are pushed onto the stack up to a 4638 /// user-configurable limit LangOptions::InstantiationDepth. 4639 SmallVector<ActiveTemplateInstantiation, 16> 4640 ActiveTemplateInstantiations; 4641 4642 /// \brief Whether we are in a SFINAE context that is not associated with 4643 /// template instantiation. 4644 /// 4645 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4646 /// of a template instantiation or template argument deduction. 4647 bool InNonInstantiationSFINAEContext; 4648 4649 /// \brief The number of ActiveTemplateInstantiation entries in 4650 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4651 /// therefore, should not be counted as part of the instantiation depth. 4652 unsigned NonInstantiationEntries; 4653 4654 /// \brief The last template from which a template instantiation 4655 /// error or warning was produced. 4656 /// 4657 /// This value is used to suppress printing of redundant template 4658 /// instantiation backtraces when there are multiple errors in the 4659 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4660 /// to implement it anywhere else. 4661 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4662 4663 /// \brief The current index into pack expansion arguments that will be 4664 /// used for substitution of parameter packs. 4665 /// 4666 /// The pack expansion index will be -1 to indicate that parameter packs 4667 /// should be instantiated as themselves. Otherwise, the index specifies 4668 /// which argument within the parameter pack will be used for substitution. 4669 int ArgumentPackSubstitutionIndex; 4670 4671 /// \brief RAII object used to change the argument pack substitution index 4672 /// within a \c Sema object. 4673 /// 4674 /// See \c ArgumentPackSubstitutionIndex for more information. 4675 class ArgumentPackSubstitutionIndexRAII { 4676 Sema &Self; 4677 int OldSubstitutionIndex; 4678 4679 public: 4680 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4681 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4682 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4683 } 4684 4685 ~ArgumentPackSubstitutionIndexRAII() { 4686 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4687 } 4688 }; 4689 4690 friend class ArgumentPackSubstitutionRAII; 4691 4692 /// \brief The stack of calls expression undergoing template instantiation. 4693 /// 4694 /// The top of this stack is used by a fixit instantiating unresolved 4695 /// function calls to fix the AST to match the textual change it prints. 4696 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4697 4698 /// \brief For each declaration that involved template argument deduction, the 4699 /// set of diagnostics that were suppressed during that template argument 4700 /// deduction. 4701 /// 4702 /// FIXME: Serialize this structure to the AST file. 4703 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4704 SuppressedDiagnostics; 4705 4706 /// \brief A stack object to be created when performing template 4707 /// instantiation. 4708 /// 4709 /// Construction of an object of type \c InstantiatingTemplate 4710 /// pushes the current instantiation onto the stack of active 4711 /// instantiations. If the size of this stack exceeds the maximum 4712 /// number of recursive template instantiations, construction 4713 /// produces an error and evaluates true. 4714 /// 4715 /// Destruction of this object will pop the named instantiation off 4716 /// the stack. 4717 struct InstantiatingTemplate { 4718 /// \brief Note that we are instantiating a class template, 4719 /// function template, or a member thereof. 4720 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4721 Decl *Entity, 4722 SourceRange InstantiationRange = SourceRange()); 4723 4724 /// \brief Note that we are instantiating a default argument in a 4725 /// template-id. 4726 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4727 TemplateDecl *Template, 4728 const TemplateArgument *TemplateArgs, 4729 unsigned NumTemplateArgs, 4730 SourceRange InstantiationRange = SourceRange()); 4731 4732 /// \brief Note that we are instantiating a default argument in a 4733 /// template-id. 4734 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4735 FunctionTemplateDecl *FunctionTemplate, 4736 const TemplateArgument *TemplateArgs, 4737 unsigned NumTemplateArgs, 4738 ActiveTemplateInstantiation::InstantiationKind Kind, 4739 sema::TemplateDeductionInfo &DeductionInfo, 4740 SourceRange InstantiationRange = SourceRange()); 4741 4742 /// \brief Note that we are instantiating as part of template 4743 /// argument deduction for a class template partial 4744 /// specialization. 4745 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4746 ClassTemplatePartialSpecializationDecl *PartialSpec, 4747 const TemplateArgument *TemplateArgs, 4748 unsigned NumTemplateArgs, 4749 sema::TemplateDeductionInfo &DeductionInfo, 4750 SourceRange InstantiationRange = SourceRange()); 4751 4752 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4753 ParmVarDecl *Param, 4754 const TemplateArgument *TemplateArgs, 4755 unsigned NumTemplateArgs, 4756 SourceRange InstantiationRange = SourceRange()); 4757 4758 /// \brief Note that we are substituting prior template arguments into a 4759 /// non-type or template template parameter. 4760 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4761 NamedDecl *Template, 4762 NonTypeTemplateParmDecl *Param, 4763 const TemplateArgument *TemplateArgs, 4764 unsigned NumTemplateArgs, 4765 SourceRange InstantiationRange); 4766 4767 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4768 NamedDecl *Template, 4769 TemplateTemplateParmDecl *Param, 4770 const TemplateArgument *TemplateArgs, 4771 unsigned NumTemplateArgs, 4772 SourceRange InstantiationRange); 4773 4774 /// \brief Note that we are checking the default template argument 4775 /// against the template parameter for a given template-id. 4776 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4777 TemplateDecl *Template, 4778 NamedDecl *Param, 4779 const TemplateArgument *TemplateArgs, 4780 unsigned NumTemplateArgs, 4781 SourceRange InstantiationRange); 4782 4783 4784 /// \brief Note that we have finished instantiating this template. 4785 void Clear(); 4786 4787 ~InstantiatingTemplate() { Clear(); } 4788 4789 /// \brief Determines whether we have exceeded the maximum 4790 /// recursive template instantiations. 4791 operator bool() const { return Invalid; } 4792 4793 private: 4794 Sema &SemaRef; 4795 bool Invalid; 4796 bool SavedInNonInstantiationSFINAEContext; 4797 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4798 SourceRange InstantiationRange); 4799 4800 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4801 4802 InstantiatingTemplate& 4803 operator=(const InstantiatingTemplate&); // not implemented 4804 }; 4805 4806 void PrintInstantiationStack(); 4807 4808 /// \brief Determines whether we are currently in a context where 4809 /// template argument substitution failures are not considered 4810 /// errors. 4811 /// 4812 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4813 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4814 /// template-deduction context object, which can be used to capture 4815 /// diagnostics that will be suppressed. 4816 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4817 4818 /// \brief RAII class used to determine whether SFINAE has 4819 /// trapped any errors that occur during template argument 4820 /// deduction.` 4821 class SFINAETrap { 4822 Sema &SemaRef; 4823 unsigned PrevSFINAEErrors; 4824 bool PrevInNonInstantiationSFINAEContext; 4825 bool PrevAccessCheckingSFINAE; 4826 4827 public: 4828 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4829 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4830 PrevInNonInstantiationSFINAEContext( 4831 SemaRef.InNonInstantiationSFINAEContext), 4832 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4833 { 4834 if (!SemaRef.isSFINAEContext()) 4835 SemaRef.InNonInstantiationSFINAEContext = true; 4836 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4837 } 4838 4839 ~SFINAETrap() { 4840 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4841 SemaRef.InNonInstantiationSFINAEContext 4842 = PrevInNonInstantiationSFINAEContext; 4843 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4844 } 4845 4846 /// \brief Determine whether any SFINAE errors have been trapped. 4847 bool hasErrorOccurred() const { 4848 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4849 } 4850 }; 4851 4852 /// \brief The current instantiation scope used to store local 4853 /// variables. 4854 LocalInstantiationScope *CurrentInstantiationScope; 4855 4856 /// \brief The number of typos corrected by CorrectTypo. 4857 unsigned TyposCorrected; 4858 4859 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4860 UnqualifiedTyposCorrectedMap; 4861 4862 /// \brief A cache containing the results of typo correction for unqualified 4863 /// name lookup. 4864 /// 4865 /// The string is the string that we corrected to (which may be empty, if 4866 /// there was no correction), while the boolean will be true when the 4867 /// string represents a keyword. 4868 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4869 4870 /// \brief Worker object for performing CFG-based warnings. 4871 sema::AnalysisBasedWarnings AnalysisWarnings; 4872 4873 /// \brief An entity for which implicit template instantiation is required. 4874 /// 4875 /// The source location associated with the declaration is the first place in 4876 /// the source code where the declaration was "used". It is not necessarily 4877 /// the point of instantiation (which will be either before or after the 4878 /// namespace-scope declaration that triggered this implicit instantiation), 4879 /// However, it is the location that diagnostics should generally refer to, 4880 /// because users will need to know what code triggered the instantiation. 4881 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4882 4883 /// \brief The queue of implicit template instantiations that are required 4884 /// but have not yet been performed. 4885 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4886 4887 /// \brief The queue of implicit template instantiations that are required 4888 /// and must be performed within the current local scope. 4889 /// 4890 /// This queue is only used for member functions of local classes in 4891 /// templates, which must be instantiated in the same scope as their 4892 /// enclosing function, so that they can reference function-local 4893 /// types, static variables, enumerators, etc. 4894 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4895 4896 void PerformPendingInstantiations(bool LocalOnly = false); 4897 4898 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4899 const MultiLevelTemplateArgumentList &TemplateArgs, 4900 SourceLocation Loc, DeclarationName Entity); 4901 4902 QualType SubstType(QualType T, 4903 const MultiLevelTemplateArgumentList &TemplateArgs, 4904 SourceLocation Loc, DeclarationName Entity); 4905 4906 TypeSourceInfo *SubstType(TypeLoc TL, 4907 const MultiLevelTemplateArgumentList &TemplateArgs, 4908 SourceLocation Loc, DeclarationName Entity); 4909 4910 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4911 const MultiLevelTemplateArgumentList &TemplateArgs, 4912 SourceLocation Loc, 4913 DeclarationName Entity); 4914 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4915 const MultiLevelTemplateArgumentList &TemplateArgs, 4916 int indexAdjustment, 4917 llvm::Optional<unsigned> NumExpansions); 4918 bool SubstParmTypes(SourceLocation Loc, 4919 ParmVarDecl **Params, unsigned NumParams, 4920 const MultiLevelTemplateArgumentList &TemplateArgs, 4921 SmallVectorImpl<QualType> &ParamTypes, 4922 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4923 ExprResult SubstExpr(Expr *E, 4924 const MultiLevelTemplateArgumentList &TemplateArgs); 4925 4926 /// \brief Substitute the given template arguments into a list of 4927 /// expressions, expanding pack expansions if required. 4928 /// 4929 /// \param Exprs The list of expressions to substitute into. 4930 /// 4931 /// \param NumExprs The number of expressions in \p Exprs. 4932 /// 4933 /// \param IsCall Whether this is some form of call, in which case 4934 /// default arguments will be dropped. 4935 /// 4936 /// \param TemplateArgs The set of template arguments to substitute. 4937 /// 4938 /// \param Outputs Will receive all of the substituted arguments. 4939 /// 4940 /// \returns true if an error occurred, false otherwise. 4941 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4942 const MultiLevelTemplateArgumentList &TemplateArgs, 4943 SmallVectorImpl<Expr *> &Outputs); 4944 4945 StmtResult SubstStmt(Stmt *S, 4946 const MultiLevelTemplateArgumentList &TemplateArgs); 4947 4948 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4949 const MultiLevelTemplateArgumentList &TemplateArgs); 4950 4951 bool 4952 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4953 CXXRecordDecl *Pattern, 4954 const MultiLevelTemplateArgumentList &TemplateArgs); 4955 4956 bool 4957 InstantiateClass(SourceLocation PointOfInstantiation, 4958 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4959 const MultiLevelTemplateArgumentList &TemplateArgs, 4960 TemplateSpecializationKind TSK, 4961 bool Complain = true); 4962 4963 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4964 const Decl *Pattern, Decl *Inst); 4965 4966 bool 4967 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4968 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4969 TemplateSpecializationKind TSK, 4970 bool Complain = true); 4971 4972 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4973 CXXRecordDecl *Instantiation, 4974 const MultiLevelTemplateArgumentList &TemplateArgs, 4975 TemplateSpecializationKind TSK); 4976 4977 void InstantiateClassTemplateSpecializationMembers( 4978 SourceLocation PointOfInstantiation, 4979 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4980 TemplateSpecializationKind TSK); 4981 4982 NestedNameSpecifierLoc 4983 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4984 const MultiLevelTemplateArgumentList &TemplateArgs); 4985 4986 DeclarationNameInfo 4987 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4988 const MultiLevelTemplateArgumentList &TemplateArgs); 4989 TemplateName 4990 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4991 SourceLocation Loc, 4992 const MultiLevelTemplateArgumentList &TemplateArgs); 4993 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4994 TemplateArgumentListInfo &Result, 4995 const MultiLevelTemplateArgumentList &TemplateArgs); 4996 4997 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4998 FunctionDecl *Function, 4999 bool Recursive = false, 5000 bool DefinitionRequired = false); 5001 void InstantiateStaticDataMemberDefinition( 5002 SourceLocation PointOfInstantiation, 5003 VarDecl *Var, 5004 bool Recursive = false, 5005 bool DefinitionRequired = false); 5006 5007 void InstantiateMemInitializers(CXXConstructorDecl *New, 5008 const CXXConstructorDecl *Tmpl, 5009 const MultiLevelTemplateArgumentList &TemplateArgs); 5010 bool InstantiateInitializer(Expr *Init, 5011 const MultiLevelTemplateArgumentList &TemplateArgs, 5012 SourceLocation &LParenLoc, 5013 ASTOwningVector<Expr*> &NewArgs, 5014 SourceLocation &RParenLoc); 5015 5016 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 5017 const MultiLevelTemplateArgumentList &TemplateArgs); 5018 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 5019 const MultiLevelTemplateArgumentList &TemplateArgs); 5020 5021 // Objective-C declarations. 5022 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 5023 IdentifierInfo *ClassName, 5024 SourceLocation ClassLoc, 5025 IdentifierInfo *SuperName, 5026 SourceLocation SuperLoc, 5027 Decl * const *ProtoRefs, 5028 unsigned NumProtoRefs, 5029 const SourceLocation *ProtoLocs, 5030 SourceLocation EndProtoLoc, 5031 AttributeList *AttrList); 5032 5033 Decl *ActOnCompatiblityAlias( 5034 SourceLocation AtCompatibilityAliasLoc, 5035 IdentifierInfo *AliasName, SourceLocation AliasLocation, 5036 IdentifierInfo *ClassName, SourceLocation ClassLocation); 5037 5038 bool CheckForwardProtocolDeclarationForCircularDependency( 5039 IdentifierInfo *PName, 5040 SourceLocation &PLoc, SourceLocation PrevLoc, 5041 const ObjCList<ObjCProtocolDecl> &PList); 5042 5043 Decl *ActOnStartProtocolInterface( 5044 SourceLocation AtProtoInterfaceLoc, 5045 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 5046 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 5047 const SourceLocation *ProtoLocs, 5048 SourceLocation EndProtoLoc, 5049 AttributeList *AttrList); 5050 5051 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 5052 IdentifierInfo *ClassName, 5053 SourceLocation ClassLoc, 5054 IdentifierInfo *CategoryName, 5055 SourceLocation CategoryLoc, 5056 Decl * const *ProtoRefs, 5057 unsigned NumProtoRefs, 5058 const SourceLocation *ProtoLocs, 5059 SourceLocation EndProtoLoc); 5060 5061 Decl *ActOnStartClassImplementation( 5062 SourceLocation AtClassImplLoc, 5063 IdentifierInfo *ClassName, SourceLocation ClassLoc, 5064 IdentifierInfo *SuperClassname, 5065 SourceLocation SuperClassLoc); 5066 5067 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 5068 IdentifierInfo *ClassName, 5069 SourceLocation ClassLoc, 5070 IdentifierInfo *CatName, 5071 SourceLocation CatLoc); 5072 5073 DeclGroupPtrTy ActOnForwardClassDeclaration(SourceLocation Loc, 5074 IdentifierInfo **IdentList, 5075 SourceLocation *IdentLocs, 5076 unsigned NumElts); 5077 5078 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 5079 const IdentifierLocPair *IdentList, 5080 unsigned NumElts, 5081 AttributeList *attrList); 5082 5083 void FindProtocolDeclaration(bool WarnOnDeclarations, 5084 const IdentifierLocPair *ProtocolId, 5085 unsigned NumProtocols, 5086 SmallVectorImpl<Decl *> &Protocols); 5087 5088 /// Ensure attributes are consistent with type. 5089 /// \param [in, out] Attributes The attributes to check; they will 5090 /// be modified to be consistent with \arg PropertyTy. 5091 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 5092 SourceLocation Loc, 5093 unsigned &Attributes); 5094 5095 /// Process the specified property declaration and create decls for the 5096 /// setters and getters as needed. 5097 /// \param property The property declaration being processed 5098 /// \param DC The semantic container for the property 5099 /// \param redeclaredProperty Declaration for property if redeclared 5100 /// in class extension. 5101 /// \param lexicalDC Container for redeclaredProperty. 5102 void ProcessPropertyDecl(ObjCPropertyDecl *property, 5103 ObjCContainerDecl *DC, 5104 ObjCPropertyDecl *redeclaredProperty = 0, 5105 ObjCContainerDecl *lexicalDC = 0); 5106 5107 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5108 ObjCPropertyDecl *SuperProperty, 5109 const IdentifierInfo *Name); 5110 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5111 5112 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5113 ObjCMethodDecl *MethodDecl, 5114 bool IsInstance); 5115 5116 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5117 5118 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5119 ObjCInterfaceDecl *ID); 5120 5121 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5122 ObjCProtocolDecl *PDecl); 5123 5124 void ActOnAtEnd(Scope *S, SourceRange AtEnd, 5125 Decl **allMethods = 0, unsigned allNum = 0, 5126 Decl **allProperties = 0, unsigned pNum = 0, 5127 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5128 5129 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5130 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5131 Selector GetterSel, Selector SetterSel, 5132 bool *OverridingProperty, 5133 tok::ObjCKeywordKind MethodImplKind, 5134 DeclContext *lexicalDC = 0); 5135 5136 Decl *ActOnPropertyImplDecl(Scope *S, 5137 SourceLocation AtLoc, 5138 SourceLocation PropertyLoc, 5139 bool ImplKind, 5140 IdentifierInfo *PropertyId, 5141 IdentifierInfo *PropertyIvar, 5142 SourceLocation PropertyIvarLoc); 5143 5144 enum ObjCSpecialMethodKind { 5145 OSMK_None, 5146 OSMK_Alloc, 5147 OSMK_New, 5148 OSMK_Copy, 5149 OSMK_RetainingInit, 5150 OSMK_NonRetainingInit 5151 }; 5152 5153 struct ObjCArgInfo { 5154 IdentifierInfo *Name; 5155 SourceLocation NameLoc; 5156 // The Type is null if no type was specified, and the DeclSpec is invalid 5157 // in this case. 5158 ParsedType Type; 5159 ObjCDeclSpec DeclSpec; 5160 5161 /// ArgAttrs - Attribute list for this argument. 5162 AttributeList *ArgAttrs; 5163 }; 5164 5165 Decl *ActOnMethodDeclaration( 5166 Scope *S, 5167 SourceLocation BeginLoc, // location of the + or -. 5168 SourceLocation EndLoc, // location of the ; or {. 5169 tok::TokenKind MethodType, 5170 ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5171 SourceLocation SelectorStartLoc, Selector Sel, 5172 // optional arguments. The number of types/arguments is obtained 5173 // from the Sel.getNumArgs(). 5174 ObjCArgInfo *ArgInfo, 5175 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5176 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5177 bool isVariadic, bool MethodDefinition); 5178 5179 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5180 // Will search "local" class/category implementations for a method decl. 5181 // Will also search in class's root looking for instance method. 5182 // Returns 0 if no method is found. 5183 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5184 ObjCInterfaceDecl *CDecl); 5185 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5186 ObjCInterfaceDecl *ClassDecl); 5187 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5188 const ObjCObjectPointerType *OPT, 5189 bool IsInstance); 5190 5191 bool inferObjCARCLifetime(ValueDecl *decl); 5192 5193 ExprResult 5194 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5195 Expr *BaseExpr, 5196 SourceLocation OpLoc, 5197 DeclarationName MemberName, 5198 SourceLocation MemberLoc, 5199 SourceLocation SuperLoc, QualType SuperType, 5200 bool Super); 5201 5202 ExprResult 5203 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5204 IdentifierInfo &propertyName, 5205 SourceLocation receiverNameLoc, 5206 SourceLocation propertyNameLoc); 5207 5208 ObjCMethodDecl *tryCaptureObjCSelf(); 5209 5210 /// \brief Describes the kind of message expression indicated by a message 5211 /// send that starts with an identifier. 5212 enum ObjCMessageKind { 5213 /// \brief The message is sent to 'super'. 5214 ObjCSuperMessage, 5215 /// \brief The message is an instance message. 5216 ObjCInstanceMessage, 5217 /// \brief The message is a class message, and the identifier is a type 5218 /// name. 5219 ObjCClassMessage 5220 }; 5221 5222 ObjCMessageKind getObjCMessageKind(Scope *S, 5223 IdentifierInfo *Name, 5224 SourceLocation NameLoc, 5225 bool IsSuper, 5226 bool HasTrailingDot, 5227 ParsedType &ReceiverType); 5228 5229 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5230 Selector Sel, 5231 SourceLocation LBracLoc, 5232 SourceLocation SelectorLoc, 5233 SourceLocation RBracLoc, 5234 MultiExprArg Args); 5235 5236 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5237 QualType ReceiverType, 5238 SourceLocation SuperLoc, 5239 Selector Sel, 5240 ObjCMethodDecl *Method, 5241 SourceLocation LBracLoc, 5242 SourceLocation SelectorLoc, 5243 SourceLocation RBracLoc, 5244 MultiExprArg Args); 5245 5246 ExprResult ActOnClassMessage(Scope *S, 5247 ParsedType Receiver, 5248 Selector Sel, 5249 SourceLocation LBracLoc, 5250 SourceLocation SelectorLoc, 5251 SourceLocation RBracLoc, 5252 MultiExprArg Args); 5253 5254 ExprResult BuildInstanceMessage(Expr *Receiver, 5255 QualType ReceiverType, 5256 SourceLocation SuperLoc, 5257 Selector Sel, 5258 ObjCMethodDecl *Method, 5259 SourceLocation LBracLoc, 5260 SourceLocation SelectorLoc, 5261 SourceLocation RBracLoc, 5262 MultiExprArg Args); 5263 5264 ExprResult ActOnInstanceMessage(Scope *S, 5265 Expr *Receiver, 5266 Selector Sel, 5267 SourceLocation LBracLoc, 5268 SourceLocation SelectorLoc, 5269 SourceLocation RBracLoc, 5270 MultiExprArg Args); 5271 5272 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5273 ObjCBridgeCastKind Kind, 5274 SourceLocation BridgeKeywordLoc, 5275 TypeSourceInfo *TSInfo, 5276 Expr *SubExpr); 5277 5278 ExprResult ActOnObjCBridgedCast(Scope *S, 5279 SourceLocation LParenLoc, 5280 ObjCBridgeCastKind Kind, 5281 SourceLocation BridgeKeywordLoc, 5282 ParsedType Type, 5283 SourceLocation RParenLoc, 5284 Expr *SubExpr); 5285 5286 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5287 5288 /// \brief Check whether the given new method is a valid override of the 5289 /// given overridden method, and set any properties that should be inherited. 5290 /// 5291 /// \returns True if an error occurred. 5292 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5293 const ObjCMethodDecl *Overridden, 5294 bool IsImplementation); 5295 5296 /// \brief Check whether the given method overrides any methods in its class, 5297 /// calling \c CheckObjCMethodOverride for each overridden method. 5298 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5299 5300 enum PragmaOptionsAlignKind { 5301 POAK_Native, // #pragma options align=native 5302 POAK_Natural, // #pragma options align=natural 5303 POAK_Packed, // #pragma options align=packed 5304 POAK_Power, // #pragma options align=power 5305 POAK_Mac68k, // #pragma options align=mac68k 5306 POAK_Reset // #pragma options align=reset 5307 }; 5308 5309 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5310 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5311 SourceLocation PragmaLoc, 5312 SourceLocation KindLoc); 5313 5314 enum PragmaPackKind { 5315 PPK_Default, // #pragma pack([n]) 5316 PPK_Show, // #pragma pack(show), only supported by MSVC. 5317 PPK_Push, // #pragma pack(push, [identifier], [n]) 5318 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5319 }; 5320 5321 enum PragmaMSStructKind { 5322 PMSST_OFF, // #pragms ms_struct off 5323 PMSST_ON // #pragms ms_struct on 5324 }; 5325 5326 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5327 void ActOnPragmaPack(PragmaPackKind Kind, 5328 IdentifierInfo *Name, 5329 Expr *Alignment, 5330 SourceLocation PragmaLoc, 5331 SourceLocation LParenLoc, 5332 SourceLocation RParenLoc); 5333 5334 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5335 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5336 5337 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5338 void ActOnPragmaUnused(const Token &Identifier, 5339 Scope *curScope, 5340 SourceLocation PragmaLoc); 5341 5342 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5343 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5344 SourceLocation PragmaLoc); 5345 5346 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II, 5347 SourceLocation Loc); 5348 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5349 5350 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5351 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5352 SourceLocation PragmaLoc, 5353 SourceLocation WeakNameLoc); 5354 5355 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5356 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5357 IdentifierInfo* AliasName, 5358 SourceLocation PragmaLoc, 5359 SourceLocation WeakNameLoc, 5360 SourceLocation AliasNameLoc); 5361 5362 /// ActOnPragmaFPContract - Called on well formed 5363 /// #pragma {STDC,OPENCL} FP_CONTRACT 5364 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5365 5366 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5367 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5368 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5369 5370 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5371 void AddMsStructLayoutForRecord(RecordDecl *RD); 5372 5373 /// FreePackedContext - Deallocate and null out PackContext. 5374 void FreePackedContext(); 5375 5376 /// PushNamespaceVisibilityAttr - Note that we've entered a 5377 /// namespace with a visibility attribute. 5378 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5379 5380 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5381 /// add an appropriate visibility attribute. 5382 void AddPushedVisibilityAttribute(Decl *RD); 5383 5384 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5385 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5386 void PopPragmaVisibility(); 5387 5388 /// FreeVisContext - Deallocate and null out VisContext. 5389 void FreeVisContext(); 5390 5391 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5392 void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E); 5393 void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T); 5394 5395 /// CastCategory - Get the correct forwarded implicit cast result category 5396 /// from the inner expression. 5397 ExprValueKind CastCategory(Expr *E); 5398 5399 /// \brief The kind of conversion being performed. 5400 enum CheckedConversionKind { 5401 /// \brief An implicit conversion. 5402 CCK_ImplicitConversion, 5403 /// \brief A C-style cast. 5404 CCK_CStyleCast, 5405 /// \brief A functional-style cast. 5406 CCK_FunctionalCast, 5407 /// \brief A cast other than a C-style cast. 5408 CCK_OtherCast 5409 }; 5410 5411 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5412 /// cast. If there is already an implicit cast, merge into the existing one. 5413 /// If isLvalue, the result of the cast is an lvalue. 5414 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5415 ExprValueKind VK = VK_RValue, 5416 const CXXCastPath *BasePath = 0, 5417 CheckedConversionKind CCK 5418 = CCK_ImplicitConversion); 5419 5420 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5421 /// to the conversion from scalar type ScalarTy to the Boolean type. 5422 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5423 5424 /// IgnoredValueConversions - Given that an expression's result is 5425 /// syntactically ignored, perform any conversions that are 5426 /// required. 5427 ExprResult IgnoredValueConversions(Expr *E); 5428 5429 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5430 // functions and arrays to their respective pointers (C99 6.3.2.1). 5431 ExprResult UsualUnaryConversions(Expr *E); 5432 5433 // DefaultFunctionArrayConversion - converts functions and arrays 5434 // to their respective pointers (C99 6.3.2.1). 5435 ExprResult DefaultFunctionArrayConversion(Expr *E); 5436 5437 // DefaultFunctionArrayLvalueConversion - converts functions and 5438 // arrays to their respective pointers and performs the 5439 // lvalue-to-rvalue conversion. 5440 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5441 5442 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5443 // the operand. This is DefaultFunctionArrayLvalueConversion, 5444 // except that it assumes the operand isn't of function or array 5445 // type. 5446 ExprResult DefaultLvalueConversion(Expr *E); 5447 5448 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5449 // do not have a prototype. Integer promotions are performed on each 5450 // argument, and arguments that have type float are promoted to double. 5451 ExprResult DefaultArgumentPromotion(Expr *E); 5452 5453 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5454 enum VariadicCallType { 5455 VariadicFunction, 5456 VariadicBlock, 5457 VariadicMethod, 5458 VariadicConstructor, 5459 VariadicDoesNotApply 5460 }; 5461 5462 /// GatherArgumentsForCall - Collector argument expressions for various 5463 /// form of call prototypes. 5464 bool GatherArgumentsForCall(SourceLocation CallLoc, 5465 FunctionDecl *FDecl, 5466 const FunctionProtoType *Proto, 5467 unsigned FirstProtoArg, 5468 Expr **Args, unsigned NumArgs, 5469 SmallVector<Expr *, 8> &AllArgs, 5470 VariadicCallType CallType = VariadicDoesNotApply); 5471 5472 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5473 // will warn if the resulting type is not a POD type. 5474 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5475 FunctionDecl *FDecl); 5476 5477 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5478 // operands and then handles various conversions that are common to binary 5479 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5480 // routine returns the first non-arithmetic type found. The client is 5481 // responsible for emitting appropriate error diagnostics. 5482 QualType UsualArithmeticConversions(ExprResult &LHS, ExprResult &RHS, 5483 bool IsCompAssign = false); 5484 5485 /// AssignConvertType - All of the 'assignment' semantic checks return this 5486 /// enum to indicate whether the assignment was allowed. These checks are 5487 /// done for simple assignments, as well as initialization, return from 5488 /// function, argument passing, etc. The query is phrased in terms of a 5489 /// source and destination type. 5490 enum AssignConvertType { 5491 /// Compatible - the types are compatible according to the standard. 5492 Compatible, 5493 5494 /// PointerToInt - The assignment converts a pointer to an int, which we 5495 /// accept as an extension. 5496 PointerToInt, 5497 5498 /// IntToPointer - The assignment converts an int to a pointer, which we 5499 /// accept as an extension. 5500 IntToPointer, 5501 5502 /// FunctionVoidPointer - The assignment is between a function pointer and 5503 /// void*, which the standard doesn't allow, but we accept as an extension. 5504 FunctionVoidPointer, 5505 5506 /// IncompatiblePointer - The assignment is between two pointers types that 5507 /// are not compatible, but we accept them as an extension. 5508 IncompatiblePointer, 5509 5510 /// IncompatiblePointer - The assignment is between two pointers types which 5511 /// point to integers which have a different sign, but are otherwise identical. 5512 /// This is a subset of the above, but broken out because it's by far the most 5513 /// common case of incompatible pointers. 5514 IncompatiblePointerSign, 5515 5516 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5517 /// c/v/r qualifiers, which we accept as an extension. 5518 CompatiblePointerDiscardsQualifiers, 5519 5520 /// IncompatiblePointerDiscardsQualifiers - The assignment 5521 /// discards qualifiers that we don't permit to be discarded, 5522 /// like address spaces. 5523 IncompatiblePointerDiscardsQualifiers, 5524 5525 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5526 /// nested pointer types, and the qualifiers other than the first two 5527 /// levels differ e.g. char ** -> const char **, but we accept them as an 5528 /// extension. 5529 IncompatibleNestedPointerQualifiers, 5530 5531 /// IncompatibleVectors - The assignment is between two vector types that 5532 /// have the same size, which we accept as an extension. 5533 IncompatibleVectors, 5534 5535 /// IntToBlockPointer - The assignment converts an int to a block 5536 /// pointer. We disallow this. 5537 IntToBlockPointer, 5538 5539 /// IncompatibleBlockPointer - The assignment is between two block 5540 /// pointers types that are not compatible. 5541 IncompatibleBlockPointer, 5542 5543 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5544 /// id type and something else (that is incompatible with it). For example, 5545 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5546 IncompatibleObjCQualifiedId, 5547 5548 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5549 /// object with __weak qualifier. 5550 IncompatibleObjCWeakRef, 5551 5552 /// Incompatible - We reject this conversion outright, it is invalid to 5553 /// represent it in the AST. 5554 Incompatible 5555 }; 5556 5557 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5558 /// assignment conversion type specified by ConvTy. This returns true if the 5559 /// conversion was invalid or false if the conversion was accepted. 5560 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5561 SourceLocation Loc, 5562 QualType DstType, QualType SrcType, 5563 Expr *SrcExpr, AssignmentAction Action, 5564 bool *Complained = 0); 5565 5566 /// CheckAssignmentConstraints - Perform type checking for assignment, 5567 /// argument passing, variable initialization, and function return values. 5568 /// C99 6.5.16. 5569 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5570 QualType LHSType, 5571 QualType RHSType); 5572 5573 /// Check assignment constraints and prepare for a conversion of the 5574 /// RHS to the LHS type. 5575 AssignConvertType CheckAssignmentConstraints(QualType LHSType, 5576 ExprResult &RHS, 5577 CastKind &Kind); 5578 5579 // CheckSingleAssignmentConstraints - Currently used by 5580 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5581 // this routine performs the default function/array converions. 5582 AssignConvertType CheckSingleAssignmentConstraints(QualType LHSType, 5583 ExprResult &RHS); 5584 5585 // \brief If the lhs type is a transparent union, check whether we 5586 // can initialize the transparent union with the given expression. 5587 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType ArgType, 5588 ExprResult &RHS); 5589 5590 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5591 5592 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5593 5594 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5595 AssignmentAction Action, 5596 bool AllowExplicit = false); 5597 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5598 AssignmentAction Action, 5599 bool AllowExplicit, 5600 ImplicitConversionSequence& ICS); 5601 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5602 const ImplicitConversionSequence& ICS, 5603 AssignmentAction Action, 5604 CheckedConversionKind CCK 5605 = CCK_ImplicitConversion); 5606 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5607 const StandardConversionSequence& SCS, 5608 AssignmentAction Action, 5609 CheckedConversionKind CCK); 5610 5611 /// the following "Check" methods will return a valid/converted QualType 5612 /// or a null QualType (indicating an error diagnostic was issued). 5613 5614 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5615 QualType InvalidOperands(SourceLocation Loc, ExprResult &LHS, 5616 ExprResult &RHS); 5617 QualType CheckPointerToMemberOperands( // C++ 5.5 5618 ExprResult &LHS, ExprResult &RHS, ExprValueKind &VK, 5619 SourceLocation OpLoc, bool isIndirect); 5620 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5621 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, bool IsCompAssign, 5622 bool IsDivide); 5623 QualType CheckRemainderOperands( // C99 6.5.5 5624 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5625 bool IsCompAssign = false); 5626 QualType CheckAdditionOperands( // C99 6.5.6 5627 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5628 QualType* CompLHSTy = 0); 5629 QualType CheckSubtractionOperands( // C99 6.5.6 5630 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5631 QualType* CompLHSTy = 0); 5632 QualType CheckShiftOperands( // C99 6.5.7 5633 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc, 5634 bool IsCompAssign = false); 5635 QualType CheckCompareOperands( // C99 6.5.8/9 5636 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned OpaqueOpc, 5637 bool isRelational); 5638 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5639 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, 5640 bool IsCompAssign = false); 5641 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5642 ExprResult &LHS, ExprResult &RHS, SourceLocation Loc, unsigned Opc); 5643 // CheckAssignmentOperands is used for both simple and compound assignment. 5644 // For simple assignment, pass both expressions and a null converted type. 5645 // For compound assignment, pass both expressions and the converted type. 5646 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5647 Expr *LHSExpr, ExprResult &RHS, SourceLocation Loc, QualType CompoundType); 5648 5649 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, 5650 QualType& LHSTy); 5651 ExprResult ConvertPropertyForRValue(Expr *E); 5652 5653 QualType CheckConditionalOperands( // C99 6.5.15 5654 ExprResult &Cond, ExprResult &LHS, ExprResult &RHS, 5655 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation QuestionLoc); 5656 QualType CXXCheckConditionalOperands( // C++ 5.16 5657 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5658 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5659 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5660 bool *NonStandardCompositeType = 0); 5661 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5662 bool *NonStandardCompositeType = 0) { 5663 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5664 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5665 E1 = Owned(E1Tmp); 5666 E2 = Owned(E2Tmp); 5667 return Composite; 5668 } 5669 5670 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5671 SourceLocation QuestionLoc); 5672 5673 bool DiagnoseConditionalForNull(Expr *LHSExpr, Expr *RHSExpr, 5674 SourceLocation QuestionLoc); 5675 5676 /// type checking for vector binary operators. 5677 QualType CheckVectorOperands(ExprResult &LHS, ExprResult &RHS, 5678 SourceLocation Loc, bool IsCompAssign); 5679 QualType CheckVectorCompareOperands(ExprResult &LHS, ExprResult &RHS, 5680 SourceLocation Loc, bool isRelational); 5681 5682 /// type checking declaration initializers (C99 6.7.8) 5683 bool CheckInitList(const InitializedEntity &Entity, 5684 InitListExpr *&InitList, QualType &DeclType); 5685 bool CheckForConstantInitializer(Expr *e, QualType t); 5686 5687 // type checking C++ declaration initializers (C++ [dcl.init]). 5688 5689 /// ReferenceCompareResult - Expresses the result of comparing two 5690 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5691 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5692 enum ReferenceCompareResult { 5693 /// Ref_Incompatible - The two types are incompatible, so direct 5694 /// reference binding is not possible. 5695 Ref_Incompatible = 0, 5696 /// Ref_Related - The two types are reference-related, which means 5697 /// that their unqualified forms (T1 and T2) are either the same 5698 /// or T1 is a base class of T2. 5699 Ref_Related, 5700 /// Ref_Compatible_With_Added_Qualification - The two types are 5701 /// reference-compatible with added qualification, meaning that 5702 /// they are reference-compatible and the qualifiers on T1 (cv1) 5703 /// are greater than the qualifiers on T2 (cv2). 5704 Ref_Compatible_With_Added_Qualification, 5705 /// Ref_Compatible - The two types are reference-compatible and 5706 /// have equivalent qualifiers (cv1 == cv2). 5707 Ref_Compatible 5708 }; 5709 5710 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5711 QualType T1, QualType T2, 5712 bool &DerivedToBase, 5713 bool &ObjCConversion, 5714 bool &ObjCLifetimeConversion); 5715 5716 /// CheckCastTypes - Check type constraints for casting between types under 5717 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5718 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TypeRange, 5719 QualType CastType, Expr *CastExpr, CastKind &Kind, 5720 ExprValueKind &VK, CXXCastPath &BasePath, 5721 bool FunctionalStyle = false); 5722 5723 ExprResult checkUnknownAnyCast(SourceRange TypeRange, QualType CastType, 5724 Expr *CastExpr, CastKind &CastKind, 5725 ExprValueKind &VK, CXXCastPath &Path); 5726 5727 // CheckVectorCast - check type constraints for vectors. 5728 // Since vectors are an extension, there are no C standard reference for this. 5729 // We allow casting between vectors and integer datatypes of the same size. 5730 // returns true if the cast is invalid 5731 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5732 CastKind &Kind); 5733 5734 // CheckExtVectorCast - check type constraints for extended vectors. 5735 // Since vectors are an extension, there are no C standard reference for this. 5736 // We allow casting between vectors and integer datatypes of the same size, 5737 // or vectors and the element type of that vector. 5738 // returns the cast expr 5739 ExprResult CheckExtVectorCast(SourceRange R, QualType DestTy, Expr *CastExpr, 5740 CastKind &Kind); 5741 5742 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5743 /// cast under C++ semantics. 5744 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5745 Expr *CastExpr, CastKind &Kind, 5746 CXXCastPath &BasePath, bool FunctionalStyle); 5747 5748 /// \brief Checks for valid expressions which can be cast to an ObjC 5749 /// pointer without needing a bridge cast. 5750 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5751 5752 /// \brief Checks for invalid conversions and casts between 5753 /// retainable pointers and other pointer kinds. 5754 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5755 Expr *&op, CheckedConversionKind CCK); 5756 5757 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5758 QualType ExprType); 5759 5760 /// checkRetainCycles - Check whether an Objective-C message send 5761 /// might create an obvious retain cycle. 5762 void checkRetainCycles(ObjCMessageExpr *msg); 5763 void checkRetainCycles(Expr *receiver, Expr *argument); 5764 5765 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5766 /// to weak/__unsafe_unretained type. 5767 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5768 5769 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5770 /// to weak/__unsafe_unretained expression. 5771 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5772 5773 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5774 /// \param Method - May be null. 5775 /// \param [out] ReturnType - The return type of the send. 5776 /// \return true iff there were any incompatible types. 5777 bool CheckMessageArgumentTypes(QualType ReceiverType, 5778 Expr **Args, unsigned NumArgs, Selector Sel, 5779 ObjCMethodDecl *Method, bool isClassMessage, 5780 bool isSuperMessage, 5781 SourceLocation lbrac, SourceLocation rbrac, 5782 QualType &ReturnType, ExprValueKind &VK); 5783 5784 /// \brief Determine the result of a message send expression based on 5785 /// the type of the receiver, the method expected to receive the message, 5786 /// and the form of the message send. 5787 QualType getMessageSendResultType(QualType ReceiverType, 5788 ObjCMethodDecl *Method, 5789 bool isClassMessage, bool isSuperMessage); 5790 5791 /// \brief If the given expression involves a message send to a method 5792 /// with a related result type, emit a note describing what happened. 5793 void EmitRelatedResultTypeNote(const Expr *E); 5794 5795 /// CheckBooleanCondition - Diagnose problems involving the use of 5796 /// the given expression as a boolean condition (e.g. in an if 5797 /// statement). Also performs the standard function and array 5798 /// decays, possibly changing the input variable. 5799 /// 5800 /// \param Loc - A location associated with the condition, e.g. the 5801 /// 'if' keyword. 5802 /// \return true iff there were any errors 5803 ExprResult CheckBooleanCondition(Expr *E, SourceLocation Loc); 5804 5805 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5806 Expr *SubExpr); 5807 5808 /// DiagnoseAssignmentAsCondition - Given that an expression is 5809 /// being used as a boolean condition, warn if it's an assignment. 5810 void DiagnoseAssignmentAsCondition(Expr *E); 5811 5812 /// \brief Redundant parentheses over an equality comparison can indicate 5813 /// that the user intended an assignment used as condition. 5814 void DiagnoseEqualityWithExtraParens(ParenExpr *ParenE); 5815 5816 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5817 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5818 5819 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5820 /// the specified width and sign. If an overflow occurs, detect it and emit 5821 /// the specified diagnostic. 5822 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5823 unsigned NewWidth, bool NewSign, 5824 SourceLocation Loc, unsigned DiagID); 5825 5826 /// Checks that the Objective-C declaration is declared in the global scope. 5827 /// Emits an error and marks the declaration as invalid if it's not declared 5828 /// in the global scope. 5829 bool CheckObjCDeclScope(Decl *D); 5830 5831 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5832 /// and reports the appropriate diagnostics. Returns false on success. 5833 /// Can optionally return the value of the expression. 5834 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5835 5836 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5837 /// the correct width, and that the field type is valid. 5838 /// Returns false on success. 5839 /// Can optionally return whether the bit-field is of width 0 5840 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5841 QualType FieldTy, const Expr *BitWidth, 5842 bool *ZeroWidth = 0); 5843 5844 /// \name Code completion 5845 //@{ 5846 /// \brief Describes the context in which code completion occurs. 5847 enum ParserCompletionContext { 5848 /// \brief Code completion occurs at top-level or namespace context. 5849 PCC_Namespace, 5850 /// \brief Code completion occurs within a class, struct, or union. 5851 PCC_Class, 5852 /// \brief Code completion occurs within an Objective-C interface, protocol, 5853 /// or category. 5854 PCC_ObjCInterface, 5855 /// \brief Code completion occurs within an Objective-C implementation or 5856 /// category implementation 5857 PCC_ObjCImplementation, 5858 /// \brief Code completion occurs within the list of instance variables 5859 /// in an Objective-C interface, protocol, category, or implementation. 5860 PCC_ObjCInstanceVariableList, 5861 /// \brief Code completion occurs following one or more template 5862 /// headers. 5863 PCC_Template, 5864 /// \brief Code completion occurs following one or more template 5865 /// headers within a class. 5866 PCC_MemberTemplate, 5867 /// \brief Code completion occurs within an expression. 5868 PCC_Expression, 5869 /// \brief Code completion occurs within a statement, which may 5870 /// also be an expression or a declaration. 5871 PCC_Statement, 5872 /// \brief Code completion occurs at the beginning of the 5873 /// initialization statement (or expression) in a for loop. 5874 PCC_ForInit, 5875 /// \brief Code completion occurs within the condition of an if, 5876 /// while, switch, or for statement. 5877 PCC_Condition, 5878 /// \brief Code completion occurs within the body of a function on a 5879 /// recovery path, where we do not have a specific handle on our position 5880 /// in the grammar. 5881 PCC_RecoveryInFunction, 5882 /// \brief Code completion occurs where only a type is permitted. 5883 PCC_Type, 5884 /// \brief Code completion occurs in a parenthesized expression, which 5885 /// might also be a type cast. 5886 PCC_ParenthesizedExpression, 5887 /// \brief Code completion occurs within a sequence of declaration 5888 /// specifiers within a function, method, or block. 5889 PCC_LocalDeclarationSpecifiers 5890 }; 5891 5892 void CodeCompleteOrdinaryName(Scope *S, 5893 ParserCompletionContext CompletionContext); 5894 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5895 bool AllowNonIdentifiers, 5896 bool AllowNestedNameSpecifiers); 5897 5898 struct CodeCompleteExpressionData; 5899 void CodeCompleteExpression(Scope *S, 5900 const CodeCompleteExpressionData &Data); 5901 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5902 SourceLocation OpLoc, 5903 bool IsArrow); 5904 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5905 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5906 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5907 void CodeCompleteCase(Scope *S); 5908 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5909 void CodeCompleteInitializer(Scope *S, Decl *D); 5910 void CodeCompleteReturn(Scope *S); 5911 void CodeCompleteAfterIf(Scope *S); 5912 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5913 5914 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5915 bool EnteringContext); 5916 void CodeCompleteUsing(Scope *S); 5917 void CodeCompleteUsingDirective(Scope *S); 5918 void CodeCompleteNamespaceDecl(Scope *S); 5919 void CodeCompleteNamespaceAliasDecl(Scope *S); 5920 void CodeCompleteOperatorName(Scope *S); 5921 void CodeCompleteConstructorInitializer(Decl *Constructor, 5922 CXXCtorInitializer** Initializers, 5923 unsigned NumInitializers); 5924 5925 void CodeCompleteObjCAtDirective(Scope *S); 5926 void CodeCompleteObjCAtVisibility(Scope *S); 5927 void CodeCompleteObjCAtStatement(Scope *S); 5928 void CodeCompleteObjCAtExpression(Scope *S); 5929 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5930 void CodeCompleteObjCPropertyGetter(Scope *S); 5931 void CodeCompleteObjCPropertySetter(Scope *S); 5932 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5933 bool IsParameter); 5934 void CodeCompleteObjCMessageReceiver(Scope *S); 5935 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5936 IdentifierInfo **SelIdents, 5937 unsigned NumSelIdents, 5938 bool AtArgumentExpression); 5939 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5940 IdentifierInfo **SelIdents, 5941 unsigned NumSelIdents, 5942 bool AtArgumentExpression, 5943 bool IsSuper = false); 5944 void CodeCompleteObjCInstanceMessage(Scope *S, Expr *Receiver, 5945 IdentifierInfo **SelIdents, 5946 unsigned NumSelIdents, 5947 bool AtArgumentExpression, 5948 ObjCInterfaceDecl *Super = 0); 5949 void CodeCompleteObjCForCollection(Scope *S, 5950 DeclGroupPtrTy IterationVar); 5951 void CodeCompleteObjCSelector(Scope *S, 5952 IdentifierInfo **SelIdents, 5953 unsigned NumSelIdents); 5954 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5955 unsigned NumProtocols); 5956 void CodeCompleteObjCProtocolDecl(Scope *S); 5957 void CodeCompleteObjCInterfaceDecl(Scope *S); 5958 void CodeCompleteObjCSuperclass(Scope *S, 5959 IdentifierInfo *ClassName, 5960 SourceLocation ClassNameLoc); 5961 void CodeCompleteObjCImplementationDecl(Scope *S); 5962 void CodeCompleteObjCInterfaceCategory(Scope *S, 5963 IdentifierInfo *ClassName, 5964 SourceLocation ClassNameLoc); 5965 void CodeCompleteObjCImplementationCategory(Scope *S, 5966 IdentifierInfo *ClassName, 5967 SourceLocation ClassNameLoc); 5968 void CodeCompleteObjCPropertyDefinition(Scope *S); 5969 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5970 IdentifierInfo *PropertyName); 5971 void CodeCompleteObjCMethodDecl(Scope *S, 5972 bool IsInstanceMethod, 5973 ParsedType ReturnType); 5974 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5975 bool IsInstanceMethod, 5976 bool AtParameterName, 5977 ParsedType ReturnType, 5978 IdentifierInfo **SelIdents, 5979 unsigned NumSelIdents); 5980 void CodeCompletePreprocessorDirective(bool InConditional); 5981 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5982 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5983 void CodeCompletePreprocessorExpression(); 5984 void CodeCompletePreprocessorMacroArgument(Scope *S, 5985 IdentifierInfo *Macro, 5986 MacroInfo *MacroInfo, 5987 unsigned Argument); 5988 void CodeCompleteNaturalLanguage(); 5989 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5990 SmallVectorImpl<CodeCompletionResult> &Results); 5991 //@} 5992 5993 //===--------------------------------------------------------------------===// 5994 // Extra semantic analysis beyond the C type system 5995 5996public: 5997 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5998 unsigned ByteNo) const; 5999 6000private: 6001 void CheckArrayAccess(const Expr *BaseExpr, const Expr *IndexExpr, 6002 bool isSubscript=false, bool AllowOnePastEnd=true); 6003 void CheckArrayAccess(const Expr *E); 6004 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 6005 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 6006 6007 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 6008 bool CheckObjCString(Expr *Arg); 6009 6010 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6011 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 6012 6013 bool SemaBuiltinVAStart(CallExpr *TheCall); 6014 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 6015 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 6016 6017public: 6018 // Used by C++ template instantiation. 6019 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 6020 6021private: 6022 bool SemaBuiltinPrefetch(CallExpr *TheCall); 6023 bool SemaBuiltinObjectSize(CallExpr *TheCall); 6024 bool SemaBuiltinLongjmp(CallExpr *TheCall); 6025 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 6026 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 6027 llvm::APSInt &Result); 6028 6029 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 6030 bool HasVAListArg, unsigned format_idx, 6031 unsigned firstDataArg, bool isPrintf); 6032 6033 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 6034 const CallExpr *TheCall, bool HasVAListArg, 6035 unsigned format_idx, unsigned firstDataArg, 6036 bool isPrintf); 6037 6038 void CheckNonNullArguments(const NonNullAttr *NonNull, 6039 const Expr * const *ExprArgs, 6040 SourceLocation CallSiteLoc); 6041 6042 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 6043 unsigned format_idx, unsigned firstDataArg, 6044 bool isPrintf); 6045 6046 /// \brief Enumeration used to describe which of the memory setting or copying 6047 /// functions is being checked by \c CheckMemaccessArguments(). 6048 enum CheckedMemoryFunction { 6049 CMF_Memset, 6050 CMF_Memcpy, 6051 CMF_Memmove, 6052 CMF_Memcmp 6053 }; 6054 6055 void CheckMemaccessArguments(const CallExpr *Call, CheckedMemoryFunction CMF, 6056 IdentifierInfo *FnName); 6057 6058 void CheckStrlcpycatArguments(const CallExpr *Call, 6059 IdentifierInfo *FnName); 6060 6061 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 6062 SourceLocation ReturnLoc); 6063 void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS); 6064 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 6065 6066 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 6067 Expr *Init); 6068 6069 /// \brief The parser's current scope. 6070 /// 6071 /// The parser maintains this state here. 6072 Scope *CurScope; 6073 6074protected: 6075 friend class Parser; 6076 friend class InitializationSequence; 6077 friend class ASTReader; 6078 friend class ASTWriter; 6079 6080public: 6081 /// \brief Retrieve the parser's current scope. 6082 /// 6083 /// This routine must only be used when it is certain that semantic analysis 6084 /// and the parser are in precisely the same context, which is not the case 6085 /// when, e.g., we are performing any kind of template instantiation. 6086 /// Therefore, the only safe places to use this scope are in the parser 6087 /// itself and in routines directly invoked from the parser and *never* from 6088 /// template substitution or instantiation. 6089 Scope *getCurScope() const { return CurScope; } 6090 6091 Decl *getObjCDeclContext() const; 6092}; 6093 6094/// \brief RAII object that enters a new expression evaluation context. 6095class EnterExpressionEvaluationContext { 6096 Sema &Actions; 6097 6098public: 6099 EnterExpressionEvaluationContext(Sema &Actions, 6100 Sema::ExpressionEvaluationContext NewContext) 6101 : Actions(Actions) { 6102 Actions.PushExpressionEvaluationContext(NewContext); 6103 } 6104 6105 ~EnterExpressionEvaluationContext() { 6106 Actions.PopExpressionEvaluationContext(); 6107 } 6108}; 6109 6110} // end namespace clang 6111 6112#endif 6113