Sema.h revision 191591336f639dad1504e863733fb831645c1644
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/LocInfoType.h" 24#include "clang/Sema/TypoCorrection.h" 25#include "clang/AST/Expr.h" 26#include "clang/AST/DeclarationName.h" 27#include "clang/AST/ExternalASTSource.h" 28#include "clang/AST/TypeLoc.h" 29#include "clang/Basic/Specifiers.h" 30#include "clang/Basic/TemplateKinds.h" 31#include "clang/Basic/TypeTraits.h" 32#include "clang/Basic/ExpressionTraits.h" 33#include "llvm/ADT/OwningPtr.h" 34#include "llvm/ADT/SmallPtrSet.h" 35#include "llvm/ADT/SmallVector.h" 36#include <deque> 37#include <string> 38 39namespace llvm { 40 class APSInt; 41 template <typename ValueT> struct DenseMapInfo; 42 template <typename ValueT, typename ValueInfoT> class DenseSet; 43} 44 45namespace clang { 46 class ADLResult; 47 class ASTConsumer; 48 class ASTContext; 49 class ASTMutationListener; 50 class ASTReader; 51 class ASTWriter; 52 class ArrayType; 53 class AttributeList; 54 class BlockDecl; 55 class CXXBasePath; 56 class CXXBasePaths; 57 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath; 58 class CXXConstructorDecl; 59 class CXXConversionDecl; 60 class CXXDestructorDecl; 61 class CXXFieldCollector; 62 class CXXMemberCallExpr; 63 class CXXMethodDecl; 64 class CXXScopeSpec; 65 class CXXTemporary; 66 class CXXTryStmt; 67 class CallExpr; 68 class ClassTemplateDecl; 69 class ClassTemplatePartialSpecializationDecl; 70 class ClassTemplateSpecializationDecl; 71 class CodeCompleteConsumer; 72 class CodeCompletionAllocator; 73 class CodeCompletionResult; 74 class Decl; 75 class DeclAccessPair; 76 class DeclContext; 77 class DeclRefExpr; 78 class DeclaratorDecl; 79 class DeducedTemplateArgument; 80 class DependentDiagnostic; 81 class DesignatedInitExpr; 82 class Designation; 83 class EnumConstantDecl; 84 class Expr; 85 class ExtVectorType; 86 class ExternalSemaSource; 87 class FormatAttr; 88 class FriendDecl; 89 class FunctionDecl; 90 class FunctionProtoType; 91 class FunctionTemplateDecl; 92 class ImplicitConversionSequence; 93 class InitListExpr; 94 class InitializationKind; 95 class InitializationSequence; 96 class InitializedEntity; 97 class IntegerLiteral; 98 class LabelStmt; 99 class LangOptions; 100 class LocalInstantiationScope; 101 class LookupResult; 102 class MacroInfo; 103 class MultiLevelTemplateArgumentList; 104 class NamedDecl; 105 class NonNullAttr; 106 class ObjCCategoryDecl; 107 class ObjCCategoryImplDecl; 108 class ObjCCompatibleAliasDecl; 109 class ObjCContainerDecl; 110 class ObjCImplDecl; 111 class ObjCImplementationDecl; 112 class ObjCInterfaceDecl; 113 class ObjCIvarDecl; 114 template <class T> class ObjCList; 115 class ObjCMessageExpr; 116 class ObjCMethodDecl; 117 class ObjCPropertyDecl; 118 class ObjCProtocolDecl; 119 class OverloadCandidateSet; 120 class OverloadExpr; 121 class ParenListExpr; 122 class ParmVarDecl; 123 class Preprocessor; 124 class PseudoDestructorTypeStorage; 125 class QualType; 126 class StandardConversionSequence; 127 class Stmt; 128 class StringLiteral; 129 class SwitchStmt; 130 class TargetAttributesSema; 131 class TemplateArgument; 132 class TemplateArgumentList; 133 class TemplateArgumentLoc; 134 class TemplateDecl; 135 class TemplateParameterList; 136 class TemplatePartialOrderingContext; 137 class TemplateTemplateParmDecl; 138 class Token; 139 class TypeAliasDecl; 140 class TypedefDecl; 141 class TypedefNameDecl; 142 class TypeLoc; 143 class UnqualifiedId; 144 class UnresolvedLookupExpr; 145 class UnresolvedMemberExpr; 146 class UnresolvedSetImpl; 147 class UnresolvedSetIterator; 148 class UsingDecl; 149 class UsingShadowDecl; 150 class ValueDecl; 151 class VarDecl; 152 class VisibilityAttr; 153 class VisibleDeclConsumer; 154 class IndirectFieldDecl; 155 156namespace sema { 157 class AccessedEntity; 158 class BlockScopeInfo; 159 class DelayedDiagnostic; 160 class FunctionScopeInfo; 161 class TemplateDeductionInfo; 162} 163 164// FIXME: No way to easily map from TemplateTypeParmTypes to 165// TemplateTypeParmDecls, so we have this horrible PointerUnion. 166typedef std::pair<llvm::PointerUnion<const TemplateTypeParmType*, NamedDecl*>, 167 SourceLocation> UnexpandedParameterPack; 168 169/// Sema - This implements semantic analysis and AST building for C. 170class Sema { 171 Sema(const Sema&); // DO NOT IMPLEMENT 172 void operator=(const Sema&); // DO NOT IMPLEMENT 173 mutable const TargetAttributesSema* TheTargetAttributesSema; 174public: 175 typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy; 176 typedef OpaquePtr<TemplateName> TemplateTy; 177 typedef OpaquePtr<QualType> TypeTy; 178 typedef Attr AttrTy; 179 typedef CXXBaseSpecifier BaseTy; 180 typedef CXXCtorInitializer MemInitTy; 181 typedef Expr ExprTy; 182 typedef Stmt StmtTy; 183 typedef TemplateParameterList TemplateParamsTy; 184 typedef NestedNameSpecifier CXXScopeTy; 185 186 OpenCLOptions OpenCLFeatures; 187 FPOptions FPFeatures; 188 189 const LangOptions &LangOpts; 190 Preprocessor &PP; 191 ASTContext &Context; 192 ASTConsumer &Consumer; 193 Diagnostic &Diags; 194 SourceManager &SourceMgr; 195 196 /// \brief Flag indicating whether or not to collect detailed statistics. 197 bool CollectStats; 198 199 /// \brief Source of additional semantic information. 200 ExternalSemaSource *ExternalSource; 201 202 /// \brief Code-completion consumer. 203 CodeCompleteConsumer *CodeCompleter; 204 205 /// CurContext - This is the current declaration context of parsing. 206 DeclContext *CurContext; 207 208 /// VAListTagName - The declaration name corresponding to __va_list_tag. 209 /// This is used as part of a hack to omit that class from ADL results. 210 DeclarationName VAListTagName; 211 212 /// PackContext - Manages the stack for #pragma pack. An alignment 213 /// of 0 indicates default alignment. 214 void *PackContext; // Really a "PragmaPackStack*" 215 216 bool MSStructPragmaOn; // True when #pragma ms_struct on 217 218 /// VisContext - Manages the stack for #pragma GCC visibility. 219 void *VisContext; // Really a "PragmaVisStack*" 220 221 /// ExprNeedsCleanups - True if the current evaluation context 222 /// requires cleanups to be run at its conclusion. 223 bool ExprNeedsCleanups; 224 225 /// \brief Stack containing information about each of the nested 226 /// function, block, and method scopes that are currently active. 227 /// 228 /// This array is never empty. Clients should ignore the first 229 /// element, which is used to cache a single FunctionScopeInfo 230 /// that's used to parse every top-level function. 231 SmallVector<sema::FunctionScopeInfo *, 4> FunctionScopes; 232 233 /// ExprTemporaries - This is the stack of temporaries that are created by 234 /// the current full expression. 235 SmallVector<CXXTemporary*, 8> ExprTemporaries; 236 237 /// ExtVectorDecls - This is a list all the extended vector types. This allows 238 /// us to associate a raw vector type with one of the ext_vector type names. 239 /// This is only necessary for issuing pretty diagnostics. 240 SmallVector<TypedefNameDecl*, 24> ExtVectorDecls; 241 242 /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes. 243 llvm::OwningPtr<CXXFieldCollector> FieldCollector; 244 245 typedef llvm::SmallPtrSet<const CXXRecordDecl*, 8> RecordDeclSetTy; 246 247 /// PureVirtualClassDiagSet - a set of class declarations which we have 248 /// emitted a list of pure virtual functions. Used to prevent emitting the 249 /// same list more than once. 250 llvm::OwningPtr<RecordDeclSetTy> PureVirtualClassDiagSet; 251 252 /// ParsingInitForAutoVars - a set of declarations with auto types for which 253 /// we are currently parsing the initializer. 254 llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars; 255 256 /// \brief A mapping from external names to the most recent 257 /// locally-scoped external declaration with that name. 258 /// 259 /// This map contains external declarations introduced in local 260 /// scoped, e.g., 261 /// 262 /// \code 263 /// void f() { 264 /// void foo(int, int); 265 /// } 266 /// \endcode 267 /// 268 /// Here, the name "foo" will be associated with the declaration on 269 /// "foo" within f. This name is not visible outside of 270 /// "f". However, we still find it in two cases: 271 /// 272 /// - If we are declaring another external with the name "foo", we 273 /// can find "foo" as a previous declaration, so that the types 274 /// of this external declaration can be checked for 275 /// compatibility. 276 /// 277 /// - If we would implicitly declare "foo" (e.g., due to a call to 278 /// "foo" in C when no prototype or definition is visible), then 279 /// we find this declaration of "foo" and complain that it is 280 /// not visible. 281 llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls; 282 283 /// \brief All the tentative definitions encountered in the TU. 284 SmallVector<VarDecl *, 2> TentativeDefinitions; 285 286 /// \brief The set of file scoped decls seen so far that have not been used 287 /// and must warn if not used. Only contains the first declaration. 288 SmallVector<const DeclaratorDecl*, 4> UnusedFileScopedDecls; 289 290 /// \brief All the delegating constructors seen so far in the file, used for 291 /// cycle detection at the end of the TU. 292 SmallVector<CXXConstructorDecl*, 4> DelegatingCtorDecls; 293 294 /// \brief All the overriding destructors seen during a class definition 295 /// (there could be multiple due to nested classes) that had their exception 296 /// spec checks delayed, plus the overridden destructor. 297 SmallVector<std::pair<const CXXDestructorDecl*, 298 const CXXDestructorDecl*>, 2> 299 DelayedDestructorExceptionSpecChecks; 300 301 /// \brief Callback to the parser to parse templated functions when needed. 302 typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD); 303 LateTemplateParserCB *LateTemplateParser; 304 void *OpaqueParser; 305 306 void SetLateTemplateParser(LateTemplateParserCB *LTP, void *P) { 307 LateTemplateParser = LTP; 308 OpaqueParser = P; 309 } 310 311 class DelayedDiagnostics; 312 313 class ParsingDeclState { 314 unsigned SavedStackSize; 315 friend class Sema::DelayedDiagnostics; 316 }; 317 318 class ProcessingContextState { 319 unsigned SavedParsingDepth; 320 unsigned SavedActiveStackBase; 321 friend class Sema::DelayedDiagnostics; 322 }; 323 324 /// A class which encapsulates the logic for delaying diagnostics 325 /// during parsing and other processing. 326 class DelayedDiagnostics { 327 /// \brief The stack of diagnostics that were delayed due to being 328 /// produced during the parsing of a declaration. 329 sema::DelayedDiagnostic *Stack; 330 331 /// \brief The number of objects on the delayed-diagnostics stack. 332 unsigned StackSize; 333 334 /// \brief The current capacity of the delayed-diagnostics stack. 335 unsigned StackCapacity; 336 337 /// \brief The index of the first "active" delayed diagnostic in 338 /// the stack. When parsing class definitions, we ignore active 339 /// delayed diagnostics from the surrounding context. 340 unsigned ActiveStackBase; 341 342 /// \brief The depth of the declarations we're currently parsing. 343 /// This gets saved and reset whenever we enter a class definition. 344 unsigned ParsingDepth; 345 346 public: 347 DelayedDiagnostics() : Stack(0), StackSize(0), StackCapacity(0), 348 ActiveStackBase(0), ParsingDepth(0) {} 349 350 ~DelayedDiagnostics() { 351 delete[] reinterpret_cast<char*>(Stack); 352 } 353 354 /// Adds a delayed diagnostic. 355 void add(const sema::DelayedDiagnostic &diag); 356 357 /// Determines whether diagnostics should be delayed. 358 bool shouldDelayDiagnostics() { return ParsingDepth > 0; } 359 360 /// Observe that we've started parsing a declaration. Access and 361 /// deprecation diagnostics will be delayed; when the declaration 362 /// is completed, all active delayed diagnostics will be evaluated 363 /// in its context, and then active diagnostics stack will be 364 /// popped down to the saved depth. 365 ParsingDeclState pushParsingDecl() { 366 ParsingDepth++; 367 368 ParsingDeclState state; 369 state.SavedStackSize = StackSize; 370 return state; 371 } 372 373 /// Observe that we're completed parsing a declaration. 374 static void popParsingDecl(Sema &S, ParsingDeclState state, Decl *decl); 375 376 /// Observe that we've started processing a different context, the 377 /// contents of which are semantically separate from the 378 /// declarations it may lexically appear in. This sets aside the 379 /// current stack of active diagnostics and starts afresh. 380 ProcessingContextState pushContext() { 381 assert(StackSize >= ActiveStackBase); 382 383 ProcessingContextState state; 384 state.SavedParsingDepth = ParsingDepth; 385 state.SavedActiveStackBase = ActiveStackBase; 386 387 ActiveStackBase = StackSize; 388 ParsingDepth = 0; 389 390 return state; 391 } 392 393 /// Observe that we've stopped processing a context. This 394 /// restores the previous stack of active diagnostics. 395 void popContext(ProcessingContextState state) { 396 assert(ActiveStackBase == StackSize); 397 assert(ParsingDepth == 0); 398 ActiveStackBase = state.SavedActiveStackBase; 399 ParsingDepth = state.SavedParsingDepth; 400 } 401 } DelayedDiagnostics; 402 403 /// A RAII object to temporarily push a declaration context. 404 class ContextRAII { 405 private: 406 Sema &S; 407 DeclContext *SavedContext; 408 ProcessingContextState SavedContextState; 409 410 public: 411 ContextRAII(Sema &S, DeclContext *ContextToPush) 412 : S(S), SavedContext(S.CurContext), 413 SavedContextState(S.DelayedDiagnostics.pushContext()) 414 { 415 assert(ContextToPush && "pushing null context"); 416 S.CurContext = ContextToPush; 417 } 418 419 void pop() { 420 if (!SavedContext) return; 421 S.CurContext = SavedContext; 422 S.DelayedDiagnostics.popContext(SavedContextState); 423 SavedContext = 0; 424 } 425 426 ~ContextRAII() { 427 pop(); 428 } 429 }; 430 431 /// WeakUndeclaredIdentifiers - Identifiers contained in 432 /// #pragma weak before declared. rare. may alias another 433 /// identifier, declared or undeclared 434 class WeakInfo { 435 IdentifierInfo *alias; // alias (optional) 436 SourceLocation loc; // for diagnostics 437 bool used; // identifier later declared? 438 public: 439 WeakInfo() 440 : alias(0), loc(SourceLocation()), used(false) {} 441 WeakInfo(IdentifierInfo *Alias, SourceLocation Loc) 442 : alias(Alias), loc(Loc), used(false) {} 443 inline IdentifierInfo * getAlias() const { return alias; } 444 inline SourceLocation getLocation() const { return loc; } 445 void setUsed(bool Used=true) { used = Used; } 446 inline bool getUsed() { return used; } 447 bool operator==(WeakInfo RHS) const { 448 return alias == RHS.getAlias() && loc == RHS.getLocation(); 449 } 450 bool operator!=(WeakInfo RHS) const { return !(*this == RHS); } 451 }; 452 llvm::DenseMap<IdentifierInfo*,WeakInfo> WeakUndeclaredIdentifiers; 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 /// \brief The set of declarations that have been referenced within 486 /// a potentially evaluated expression. 487 typedef SmallVector<std::pair<SourceLocation, Decl *>, 10> 488 PotentiallyReferencedDecls; 489 490 /// \brief A set of diagnostics that may be emitted. 491 typedef SmallVector<std::pair<SourceLocation, PartialDiagnostic>, 10> 492 PotentiallyEmittedDiagnostics; 493 494 /// \brief Describes how the expressions currently being parsed are 495 /// evaluated at run-time, if at all. 496 enum ExpressionEvaluationContext { 497 /// \brief The current expression and its subexpressions occur within an 498 /// unevaluated operand (C++0x [expr]p8), such as a constant expression 499 /// or the subexpression of \c sizeof, where the type or the value of the 500 /// expression may be significant but no code will be generated to evaluate 501 /// the value of the expression at run time. 502 Unevaluated, 503 504 /// \brief The current expression is potentially evaluated at run time, 505 /// which means that code may be generated to evaluate the value of the 506 /// expression at run time. 507 PotentiallyEvaluated, 508 509 /// \brief The current expression may be potentially evaluated or it may 510 /// be unevaluated, but it is impossible to tell from the lexical context. 511 /// This evaluation context is used primary for the operand of the C++ 512 /// \c typeid expression, whose argument is potentially evaluated only when 513 /// it is an lvalue of polymorphic class type (C++ [basic.def.odr]p2). 514 PotentiallyPotentiallyEvaluated, 515 516 /// \brief The current expression is potentially evaluated, but any 517 /// declarations referenced inside that expression are only used if 518 /// in fact the current expression is used. 519 /// 520 /// This value is used when parsing default function arguments, for which 521 /// we would like to provide diagnostics (e.g., passing non-POD arguments 522 /// through varargs) but do not want to mark declarations as "referenced" 523 /// until the default argument is used. 524 PotentiallyEvaluatedIfUsed 525 }; 526 527 /// \brief Data structure used to record current or nested 528 /// expression evaluation contexts. 529 struct ExpressionEvaluationContextRecord { 530 /// \brief The expression evaluation context. 531 ExpressionEvaluationContext Context; 532 533 /// \brief Whether the enclosing context needed a cleanup. 534 bool ParentNeedsCleanups; 535 536 /// \brief The number of temporaries that were active when we 537 /// entered this expression evaluation context. 538 unsigned NumTemporaries; 539 540 /// \brief The set of declarations referenced within a 541 /// potentially potentially-evaluated context. 542 /// 543 /// When leaving a potentially potentially-evaluated context, each 544 /// of these elements will be as referenced if the corresponding 545 /// potentially potentially evaluated expression is potentially 546 /// evaluated. 547 PotentiallyReferencedDecls *PotentiallyReferenced; 548 549 /// \brief The set of diagnostics to emit should this potentially 550 /// potentially-evaluated context become evaluated. 551 PotentiallyEmittedDiagnostics *PotentiallyDiagnosed; 552 553 ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context, 554 unsigned NumTemporaries, 555 bool ParentNeedsCleanups) 556 : Context(Context), ParentNeedsCleanups(ParentNeedsCleanups), 557 NumTemporaries(NumTemporaries), 558 PotentiallyReferenced(0), PotentiallyDiagnosed(0) { } 559 560 void addReferencedDecl(SourceLocation Loc, Decl *Decl) { 561 if (!PotentiallyReferenced) 562 PotentiallyReferenced = new PotentiallyReferencedDecls; 563 PotentiallyReferenced->push_back(std::make_pair(Loc, Decl)); 564 } 565 566 void addDiagnostic(SourceLocation Loc, const PartialDiagnostic &PD) { 567 if (!PotentiallyDiagnosed) 568 PotentiallyDiagnosed = new PotentiallyEmittedDiagnostics; 569 PotentiallyDiagnosed->push_back(std::make_pair(Loc, PD)); 570 } 571 572 void Destroy() { 573 delete PotentiallyReferenced; 574 delete PotentiallyDiagnosed; 575 PotentiallyReferenced = 0; 576 PotentiallyDiagnosed = 0; 577 } 578 }; 579 580 /// A stack of expression evaluation contexts. 581 SmallVector<ExpressionEvaluationContextRecord, 8> ExprEvalContexts; 582 583 /// SpecialMemberOverloadResult - The overloading result for a special member 584 /// function. 585 /// 586 /// This is basically a wrapper around PointerIntPair. The lowest bit of the 587 /// integer is used to determine whether we have a parameter qualification 588 /// match, the second-lowest is whether we had success in resolving the 589 /// overload to a unique non-deleted function. 590 /// 591 /// The ConstParamMatch bit represents whether, when looking up a copy 592 /// constructor or assignment operator, we found a potential copy 593 /// constructor/assignment operator whose first parameter is const-qualified. 594 /// This is used for determining parameter types of other objects and is 595 /// utterly meaningless on other types of special members. 596 class SpecialMemberOverloadResult : public llvm::FastFoldingSetNode { 597 llvm::PointerIntPair<CXXMethodDecl*, 2> Pair; 598 public: 599 SpecialMemberOverloadResult(const llvm::FoldingSetNodeID &ID) 600 : FastFoldingSetNode(ID) 601 {} 602 603 CXXMethodDecl *getMethod() const { return Pair.getPointer(); } 604 void setMethod(CXXMethodDecl *MD) { Pair.setPointer(MD); } 605 606 bool hasSuccess() const { return Pair.getInt() & 0x1; } 607 void setSuccess(bool B) { 608 Pair.setInt(unsigned(B) | hasConstParamMatch() << 1); 609 } 610 611 bool hasConstParamMatch() const { return Pair.getInt() & 0x2; } 612 void setConstParamMatch(bool B) { 613 Pair.setInt(B << 1 | unsigned(hasSuccess())); 614 } 615 }; 616 617 /// \brief A cache of special member function overload resolution results 618 /// for C++ records. 619 llvm::FoldingSet<SpecialMemberOverloadResult> SpecialMemberCache; 620 621 /// \brief Whether the code handled by Sema should be considered a 622 /// complete translation unit or not. 623 /// 624 /// When true (which is generally the case), Sema will perform 625 /// end-of-translation-unit semantic tasks (such as creating 626 /// initializers for tentative definitions in C) once parsing has 627 /// completed. This flag will be false when building PCH files, 628 /// since a PCH file is by definition not a complete translation 629 /// unit. 630 bool CompleteTranslationUnit; 631 632 llvm::BumpPtrAllocator BumpAlloc; 633 634 /// \brief The number of SFINAE diagnostics that have been trapped. 635 unsigned NumSFINAEErrors; 636 637 typedef llvm::DenseMap<ParmVarDecl *, SmallVector<ParmVarDecl *, 1> > 638 UnparsedDefaultArgInstantiationsMap; 639 640 /// \brief A mapping from parameters with unparsed default arguments to the 641 /// set of instantiations of each parameter. 642 /// 643 /// This mapping is a temporary data structure used when parsing 644 /// nested class templates or nested classes of class templates, 645 /// where we might end up instantiating an inner class before the 646 /// default arguments of its methods have been parsed. 647 UnparsedDefaultArgInstantiationsMap UnparsedDefaultArgInstantiations; 648 649 // Contains the locations of the beginning of unparsed default 650 // argument locations. 651 llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs; 652 653 /// UndefinedInternals - all the used, undefined objects with 654 /// internal linkage in this translation unit. 655 llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals; 656 657 typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods; 658 typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool; 659 660 /// Method Pool - allows efficient lookup when typechecking messages to "id". 661 /// We need to maintain a list, since selectors can have differing signatures 662 /// across classes. In Cocoa, this happens to be extremely uncommon (only 1% 663 /// of selectors are "overloaded"). 664 GlobalMethodPool MethodPool; 665 666 /// Method selectors used in a @selector expression. Used for implementation 667 /// of -Wselector. 668 llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors; 669 670 GlobalMethodPool::iterator ReadMethodPool(Selector Sel); 671 672 /// Private Helper predicate to check for 'self'. 673 bool isSelfExpr(Expr *RExpr); 674public: 675 Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer, 676 bool CompleteTranslationUnit = true, 677 CodeCompleteConsumer *CompletionConsumer = 0); 678 ~Sema(); 679 680 /// \brief Perform initialization that occurs after the parser has been 681 /// initialized but before it parses anything. 682 void Initialize(); 683 684 const LangOptions &getLangOptions() const { return LangOpts; } 685 OpenCLOptions &getOpenCLOptions() { return OpenCLFeatures; } 686 FPOptions &getFPOptions() { return FPFeatures; } 687 688 Diagnostic &getDiagnostics() const { return Diags; } 689 SourceManager &getSourceManager() const { return SourceMgr; } 690 const TargetAttributesSema &getTargetAttributesSema() const; 691 Preprocessor &getPreprocessor() const { return PP; } 692 ASTContext &getASTContext() const { return Context; } 693 ASTConsumer &getASTConsumer() const { return Consumer; } 694 ASTMutationListener *getASTMutationListener() const; 695 696 void PrintStats() const; 697 698 /// \brief Helper class that creates diagnostics with optional 699 /// template instantiation stacks. 700 /// 701 /// This class provides a wrapper around the basic DiagnosticBuilder 702 /// class that emits diagnostics. SemaDiagnosticBuilder is 703 /// responsible for emitting the diagnostic (as DiagnosticBuilder 704 /// does) and, if the diagnostic comes from inside a template 705 /// instantiation, printing the template instantiation stack as 706 /// well. 707 class SemaDiagnosticBuilder : public DiagnosticBuilder { 708 Sema &SemaRef; 709 unsigned DiagID; 710 711 public: 712 SemaDiagnosticBuilder(DiagnosticBuilder &DB, Sema &SemaRef, unsigned DiagID) 713 : DiagnosticBuilder(DB), SemaRef(SemaRef), DiagID(DiagID) { } 714 715 explicit SemaDiagnosticBuilder(Sema &SemaRef) 716 : DiagnosticBuilder(DiagnosticBuilder::Suppress), SemaRef(SemaRef) { } 717 718 ~SemaDiagnosticBuilder(); 719 }; 720 721 /// \brief Emit a diagnostic. 722 SemaDiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID); 723 724 /// \brief Emit a partial diagnostic. 725 SemaDiagnosticBuilder Diag(SourceLocation Loc, const PartialDiagnostic& PD); 726 727 /// \brief Build a partial diagnostic. 728 PartialDiagnostic PDiag(unsigned DiagID = 0); // in SemaInternal.h 729 730 bool findMacroSpelling(SourceLocation &loc, StringRef name); 731 732 ExprResult Owned(Expr* E) { return E; } 733 ExprResult Owned(ExprResult R) { return R; } 734 StmtResult Owned(Stmt* S) { return S; } 735 736 void ActOnEndOfTranslationUnit(); 737 738 void CheckDelegatingCtorCycles(); 739 740 Scope *getScopeForContext(DeclContext *Ctx); 741 742 void PushFunctionScope(); 743 void PushBlockScope(Scope *BlockScope, BlockDecl *Block); 744 void PopFunctionOrBlockScope(const sema::AnalysisBasedWarnings::Policy *WP =0, 745 const Decl *D = 0, const BlockExpr *blkExpr = 0); 746 747 sema::FunctionScopeInfo *getCurFunction() const { 748 return FunctionScopes.back(); 749 } 750 751 bool hasAnyUnrecoverableErrorsInThisFunction() const; 752 753 /// \brief Retrieve the current block, if any. 754 sema::BlockScopeInfo *getCurBlock(); 755 756 /// WeakTopLevelDeclDecls - access to #pragma weak-generated Decls 757 SmallVector<Decl*,2> &WeakTopLevelDecls() { return WeakTopLevelDecl; } 758 759 //===--------------------------------------------------------------------===// 760 // Type Analysis / Processing: SemaType.cpp. 761 // 762 763 QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs); 764 QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) { 765 return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR)); 766 } 767 QualType BuildPointerType(QualType T, 768 SourceLocation Loc, DeclarationName Entity); 769 QualType BuildReferenceType(QualType T, bool LValueRef, 770 SourceLocation Loc, DeclarationName Entity); 771 QualType BuildArrayType(QualType T, ArrayType::ArraySizeModifier ASM, 772 Expr *ArraySize, unsigned Quals, 773 SourceRange Brackets, DeclarationName Entity); 774 QualType BuildExtVectorType(QualType T, Expr *ArraySize, 775 SourceLocation AttrLoc); 776 QualType BuildFunctionType(QualType T, 777 QualType *ParamTypes, unsigned NumParamTypes, 778 bool Variadic, unsigned Quals, 779 RefQualifierKind RefQualifier, 780 SourceLocation Loc, DeclarationName Entity, 781 FunctionType::ExtInfo Info); 782 QualType BuildMemberPointerType(QualType T, QualType Class, 783 SourceLocation Loc, 784 DeclarationName Entity); 785 QualType BuildBlockPointerType(QualType T, 786 SourceLocation Loc, DeclarationName Entity); 787 QualType BuildParenType(QualType T); 788 789 TypeSourceInfo *GetTypeForDeclarator(Declarator &D, Scope *S); 790 TypeSourceInfo *GetTypeForDeclaratorCast(Declarator &D, QualType FromTy); 791 TypeSourceInfo *GetTypeSourceInfoForDeclarator(Declarator &D, QualType T, 792 TypeSourceInfo *ReturnTypeInfo); 793 /// \brief Package the given type and TSI into a ParsedType. 794 ParsedType CreateParsedType(QualType T, TypeSourceInfo *TInfo); 795 DeclarationNameInfo GetNameForDeclarator(Declarator &D); 796 DeclarationNameInfo GetNameFromUnqualifiedId(const UnqualifiedId &Name); 797 static QualType GetTypeFromParser(ParsedType Ty, TypeSourceInfo **TInfo = 0); 798 bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range); 799 bool CheckDistantExceptionSpec(QualType T); 800 bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New); 801 bool CheckEquivalentExceptionSpec( 802 const FunctionProtoType *Old, SourceLocation OldLoc, 803 const FunctionProtoType *New, SourceLocation NewLoc); 804 bool CheckEquivalentExceptionSpec( 805 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 806 const FunctionProtoType *Old, SourceLocation OldLoc, 807 const FunctionProtoType *New, SourceLocation NewLoc, 808 bool *MissingExceptionSpecification = 0, 809 bool *MissingEmptyExceptionSpecification = 0, 810 bool AllowNoexceptAllMatchWithNoSpec = false, 811 bool IsOperatorNew = false); 812 bool CheckExceptionSpecSubset( 813 const PartialDiagnostic &DiagID, const PartialDiagnostic & NoteID, 814 const FunctionProtoType *Superset, SourceLocation SuperLoc, 815 const FunctionProtoType *Subset, SourceLocation SubLoc); 816 bool CheckParamExceptionSpec(const PartialDiagnostic & NoteID, 817 const FunctionProtoType *Target, SourceLocation TargetLoc, 818 const FunctionProtoType *Source, SourceLocation SourceLoc); 819 820 TypeResult ActOnTypeName(Scope *S, Declarator &D); 821 822 bool RequireCompleteType(SourceLocation Loc, QualType T, 823 const PartialDiagnostic &PD, 824 std::pair<SourceLocation, PartialDiagnostic> Note); 825 bool RequireCompleteType(SourceLocation Loc, QualType T, 826 const PartialDiagnostic &PD); 827 bool RequireCompleteType(SourceLocation Loc, QualType T, 828 unsigned DiagID); 829 bool RequireCompleteExprType(Expr *E, const PartialDiagnostic &PD, 830 std::pair<SourceLocation, 831 PartialDiagnostic> Note); 832 833 834 QualType getElaboratedType(ElaboratedTypeKeyword Keyword, 835 const CXXScopeSpec &SS, QualType T); 836 837 QualType BuildTypeofExprType(Expr *E, SourceLocation Loc); 838 QualType BuildDecltypeType(Expr *E, SourceLocation Loc); 839 QualType BuildUnaryTransformType(QualType BaseType, 840 UnaryTransformType::UTTKind UKind, 841 SourceLocation Loc); 842 843 //===--------------------------------------------------------------------===// 844 // Symbol table / Decl tracking callbacks: SemaDecl.cpp. 845 // 846 847 DeclGroupPtrTy ConvertDeclToDeclGroup(Decl *Ptr, Decl *OwnedType = 0); 848 849 void DiagnoseUseOfUnimplementedSelectors(); 850 851 ParsedType getTypeName(IdentifierInfo &II, SourceLocation NameLoc, 852 Scope *S, CXXScopeSpec *SS = 0, 853 bool isClassName = false, 854 bool HasTrailingDot = false, 855 ParsedType ObjectType = ParsedType(), 856 bool WantNontrivialTypeSourceInfo = false); 857 TypeSpecifierType isTagName(IdentifierInfo &II, Scope *S); 858 bool isMicrosoftMissingTypename(const CXXScopeSpec *SS); 859 bool DiagnoseUnknownTypeName(const IdentifierInfo &II, 860 SourceLocation IILoc, 861 Scope *S, 862 CXXScopeSpec *SS, 863 ParsedType &SuggestedType); 864 865 /// \brief Describes the result of the name lookup and resolution performed 866 /// by \c ClassifyName(). 867 enum NameClassificationKind { 868 NC_Unknown, 869 NC_Error, 870 NC_Keyword, 871 NC_Type, 872 NC_Expression, 873 NC_NestedNameSpecifier, 874 NC_TypeTemplate, 875 NC_FunctionTemplate 876 }; 877 878 class NameClassification { 879 NameClassificationKind Kind; 880 ExprResult Expr; 881 TemplateName Template; 882 ParsedType Type; 883 const IdentifierInfo *Keyword; 884 885 explicit NameClassification(NameClassificationKind Kind) : Kind(Kind) {} 886 887 public: 888 NameClassification(ExprResult Expr) : Kind(NC_Expression), Expr(Expr) {} 889 890 NameClassification(ParsedType Type) : Kind(NC_Type), Type(Type) {} 891 892 NameClassification(const IdentifierInfo *Keyword) 893 : Kind(NC_Keyword), Keyword(Keyword) { } 894 895 static NameClassification Error() { 896 return NameClassification(NC_Error); 897 } 898 899 static NameClassification Unknown() { 900 return NameClassification(NC_Unknown); 901 } 902 903 static NameClassification NestedNameSpecifier() { 904 return NameClassification(NC_NestedNameSpecifier); 905 } 906 907 static NameClassification TypeTemplate(TemplateName Name) { 908 NameClassification Result(NC_TypeTemplate); 909 Result.Template = Name; 910 return Result; 911 } 912 913 static NameClassification FunctionTemplate(TemplateName Name) { 914 NameClassification Result(NC_FunctionTemplate); 915 Result.Template = Name; 916 return Result; 917 } 918 919 NameClassificationKind getKind() const { return Kind; } 920 921 ParsedType getType() const { 922 assert(Kind == NC_Type); 923 return Type; 924 } 925 926 ExprResult getExpression() const { 927 assert(Kind == NC_Expression); 928 return Expr; 929 } 930 931 TemplateName getTemplateName() const { 932 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 933 return Template; 934 } 935 936 TemplateNameKind getTemplateNameKind() const { 937 assert(Kind == NC_TypeTemplate || Kind == NC_FunctionTemplate); 938 return Kind == NC_TypeTemplate? TNK_Type_template : TNK_Function_template; 939 } 940}; 941 942 /// \brief Perform name lookup on the given name, classifying it based on 943 /// the results of name lookup and the following token. 944 /// 945 /// This routine is used by the parser to resolve identifiers and help direct 946 /// parsing. When the identifier cannot be found, this routine will attempt 947 /// to correct the typo and classify based on the resulting name. 948 /// 949 /// \param S The scope in which we're performing name lookup. 950 /// 951 /// \param SS The nested-name-specifier that precedes the name. 952 /// 953 /// \param Name The identifier. If typo correction finds an alternative name, 954 /// this pointer parameter will be updated accordingly. 955 /// 956 /// \param NameLoc The location of the identifier. 957 /// 958 /// \param NextToken The token following the identifier. Used to help 959 /// disambiguate the name. 960 NameClassification ClassifyName(Scope *S, 961 CXXScopeSpec &SS, 962 IdentifierInfo *&Name, 963 SourceLocation NameLoc, 964 const Token &NextToken); 965 966 Decl *ActOnDeclarator(Scope *S, Declarator &D); 967 968 Decl *HandleDeclarator(Scope *S, Declarator &D, 969 MultiTemplateParamsArg TemplateParameterLists, 970 bool IsFunctionDefinition); 971 void RegisterLocallyScopedExternCDecl(NamedDecl *ND, 972 const LookupResult &Previous, 973 Scope *S); 974 bool DiagnoseClassNameShadow(DeclContext *DC, DeclarationNameInfo Info); 975 void DiagnoseFunctionSpecifiers(Declarator& D); 976 void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R); 977 void CheckShadow(Scope *S, VarDecl *D); 978 void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange); 979 void CheckTypedefForVariablyModifiedType(Scope *S, TypedefNameDecl *D); 980 NamedDecl* ActOnTypedefDeclarator(Scope* S, Declarator& D, DeclContext* DC, 981 QualType R, TypeSourceInfo *TInfo, 982 LookupResult &Previous, bool &Redeclaration); 983 NamedDecl* ActOnTypedefNameDecl(Scope* S, DeclContext* DC, TypedefNameDecl *D, 984 LookupResult &Previous, bool &Redeclaration); 985 NamedDecl* ActOnVariableDeclarator(Scope* S, Declarator& D, DeclContext* DC, 986 QualType R, TypeSourceInfo *TInfo, 987 LookupResult &Previous, 988 MultiTemplateParamsArg TemplateParamLists, 989 bool &Redeclaration); 990 void CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous, 991 bool &Redeclaration); 992 void CheckCompleteVariableDeclaration(VarDecl *var); 993 NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC, 994 QualType R, TypeSourceInfo *TInfo, 995 LookupResult &Previous, 996 MultiTemplateParamsArg TemplateParamLists, 997 bool IsFunctionDefinition, 998 bool &Redeclaration); 999 bool AddOverriddenMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1000 void DiagnoseHiddenVirtualMethods(CXXRecordDecl *DC, CXXMethodDecl *MD); 1001 void CheckFunctionDeclaration(Scope *S, 1002 FunctionDecl *NewFD, LookupResult &Previous, 1003 bool IsExplicitSpecialization, 1004 bool &Redeclaration); 1005 void CheckMain(FunctionDecl *FD); 1006 Decl *ActOnParamDeclarator(Scope *S, Declarator &D); 1007 ParmVarDecl *BuildParmVarDeclForTypedef(DeclContext *DC, 1008 SourceLocation Loc, 1009 QualType T); 1010 ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc, 1011 SourceLocation NameLoc, IdentifierInfo *Name, 1012 QualType T, TypeSourceInfo *TSInfo, 1013 StorageClass SC, StorageClass SCAsWritten); 1014 void ActOnParamDefaultArgument(Decl *param, 1015 SourceLocation EqualLoc, 1016 Expr *defarg); 1017 void ActOnParamUnparsedDefaultArgument(Decl *param, 1018 SourceLocation EqualLoc, 1019 SourceLocation ArgLoc); 1020 void ActOnParamDefaultArgumentError(Decl *param); 1021 bool SetParamDefaultArgument(ParmVarDecl *Param, Expr *DefaultArg, 1022 SourceLocation EqualLoc); 1023 1024 void AddInitializerToDecl(Decl *dcl, Expr *init, bool DirectInit, 1025 bool TypeMayContainAuto); 1026 void ActOnUninitializedDecl(Decl *dcl, bool TypeMayContainAuto); 1027 void ActOnInitializerError(Decl *Dcl); 1028 void ActOnCXXForRangeDecl(Decl *D); 1029 void SetDeclDeleted(Decl *dcl, SourceLocation DelLoc); 1030 void SetDeclDefaulted(Decl *dcl, SourceLocation DefaultLoc); 1031 void FinalizeDeclaration(Decl *D); 1032 DeclGroupPtrTy FinalizeDeclaratorGroup(Scope *S, const DeclSpec &DS, 1033 Decl **Group, 1034 unsigned NumDecls); 1035 DeclGroupPtrTy BuildDeclaratorGroup(Decl **Group, unsigned NumDecls, 1036 bool TypeMayContainAuto = true); 1037 void ActOnFinishKNRParamDeclarations(Scope *S, Declarator &D, 1038 SourceLocation LocAfterDecls); 1039 void CheckForFunctionRedefinition(FunctionDecl *FD); 1040 Decl *ActOnStartOfFunctionDef(Scope *S, Declarator &D); 1041 Decl *ActOnStartOfFunctionDef(Scope *S, Decl *D); 1042 void ActOnStartOfObjCMethodDef(Scope *S, Decl *D); 1043 1044 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body); 1045 Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation); 1046 1047 /// \brief Diagnose any unused parameters in the given sequence of 1048 /// ParmVarDecl pointers. 1049 void DiagnoseUnusedParameters(ParmVarDecl * const *Begin, 1050 ParmVarDecl * const *End); 1051 1052 /// \brief Diagnose whether the size of parameters or return value of a 1053 /// function or obj-c method definition is pass-by-value and larger than a 1054 /// specified threshold. 1055 void DiagnoseSizeOfParametersAndReturnValue(ParmVarDecl * const *Begin, 1056 ParmVarDecl * const *End, 1057 QualType ReturnTy, 1058 NamedDecl *D); 1059 1060 void DiagnoseInvalidJumps(Stmt *Body); 1061 Decl *ActOnFileScopeAsmDecl(Expr *expr, 1062 SourceLocation AsmLoc, 1063 SourceLocation RParenLoc); 1064 1065 /// Scope actions. 1066 void ActOnPopScope(SourceLocation Loc, Scope *S); 1067 void ActOnTranslationUnitScope(Scope *S); 1068 1069 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1070 DeclSpec &DS); 1071 Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS, 1072 DeclSpec &DS, 1073 MultiTemplateParamsArg TemplateParams); 1074 1075 StmtResult ActOnVlaStmt(const DeclSpec &DS); 1076 1077 Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS, 1078 AccessSpecifier AS, 1079 RecordDecl *Record); 1080 1081 Decl *BuildMicrosoftCAnonymousStruct(Scope *S, DeclSpec &DS, 1082 RecordDecl *Record); 1083 1084 bool isAcceptableTagRedeclaration(const TagDecl *Previous, 1085 TagTypeKind NewTag, bool isDefinition, 1086 SourceLocation NewTagLoc, 1087 const IdentifierInfo &Name); 1088 1089 enum TagUseKind { 1090 TUK_Reference, // Reference to a tag: 'struct foo *X;' 1091 TUK_Declaration, // Fwd decl of a tag: 'struct foo;' 1092 TUK_Definition, // Definition of a tag: 'struct foo { int X; } Y;' 1093 TUK_Friend // Friend declaration: 'friend struct foo;' 1094 }; 1095 1096 Decl *ActOnTag(Scope *S, unsigned TagSpec, TagUseKind TUK, 1097 SourceLocation KWLoc, CXXScopeSpec &SS, 1098 IdentifierInfo *Name, SourceLocation NameLoc, 1099 AttributeList *Attr, AccessSpecifier AS, 1100 MultiTemplateParamsArg TemplateParameterLists, 1101 bool &OwnedDecl, bool &IsDependent, bool ScopedEnum, 1102 bool ScopedEnumUsesClassTag, TypeResult UnderlyingType); 1103 1104 Decl *ActOnTemplatedFriendTag(Scope *S, SourceLocation FriendLoc, 1105 unsigned TagSpec, SourceLocation TagLoc, 1106 CXXScopeSpec &SS, 1107 IdentifierInfo *Name, SourceLocation NameLoc, 1108 AttributeList *Attr, 1109 MultiTemplateParamsArg TempParamLists); 1110 1111 TypeResult ActOnDependentTag(Scope *S, 1112 unsigned TagSpec, 1113 TagUseKind TUK, 1114 const CXXScopeSpec &SS, 1115 IdentifierInfo *Name, 1116 SourceLocation TagLoc, 1117 SourceLocation NameLoc); 1118 1119 void ActOnDefs(Scope *S, Decl *TagD, SourceLocation DeclStart, 1120 IdentifierInfo *ClassName, 1121 SmallVectorImpl<Decl *> &Decls); 1122 Decl *ActOnField(Scope *S, Decl *TagD, SourceLocation DeclStart, 1123 Declarator &D, Expr *BitfieldWidth); 1124 1125 FieldDecl *HandleField(Scope *S, RecordDecl *TagD, SourceLocation DeclStart, 1126 Declarator &D, Expr *BitfieldWidth, bool HasInit, 1127 AccessSpecifier AS); 1128 1129 FieldDecl *CheckFieldDecl(DeclarationName Name, QualType T, 1130 TypeSourceInfo *TInfo, 1131 RecordDecl *Record, SourceLocation Loc, 1132 bool Mutable, Expr *BitfieldWidth, bool HasInit, 1133 SourceLocation TSSL, 1134 AccessSpecifier AS, NamedDecl *PrevDecl, 1135 Declarator *D = 0); 1136 1137 enum CXXSpecialMember { 1138 CXXDefaultConstructor, 1139 CXXCopyConstructor, 1140 CXXMoveConstructor, 1141 CXXCopyAssignment, 1142 CXXMoveAssignment, 1143 CXXDestructor, 1144 CXXInvalid 1145 }; 1146 bool CheckNontrivialField(FieldDecl *FD); 1147 void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem); 1148 CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD); 1149 void ActOnLastBitfield(SourceLocation DeclStart, Decl *IntfDecl, 1150 SmallVectorImpl<Decl *> &AllIvarDecls); 1151 Decl *ActOnIvar(Scope *S, SourceLocation DeclStart, Decl *IntfDecl, 1152 Declarator &D, Expr *BitfieldWidth, 1153 tok::ObjCKeywordKind visibility); 1154 1155 // This is used for both record definitions and ObjC interface declarations. 1156 void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl, 1157 Decl **Fields, unsigned NumFields, 1158 SourceLocation LBrac, SourceLocation RBrac, 1159 AttributeList *AttrList); 1160 1161 /// ActOnTagStartDefinition - Invoked when we have entered the 1162 /// scope of a tag's definition (e.g., for an enumeration, class, 1163 /// struct, or union). 1164 void ActOnTagStartDefinition(Scope *S, Decl *TagDecl); 1165 1166 /// ActOnStartCXXMemberDeclarations - Invoked when we have parsed a 1167 /// C++ record definition's base-specifiers clause and are starting its 1168 /// member declarations. 1169 void ActOnStartCXXMemberDeclarations(Scope *S, Decl *TagDecl, 1170 SourceLocation FinalLoc, 1171 SourceLocation LBraceLoc); 1172 1173 /// ActOnTagFinishDefinition - Invoked once we have finished parsing 1174 /// the definition of a tag (enumeration, class, struct, or union). 1175 void ActOnTagFinishDefinition(Scope *S, Decl *TagDecl, 1176 SourceLocation RBraceLoc); 1177 1178 /// ActOnTagDefinitionError - Invoked when there was an unrecoverable 1179 /// error parsing the definition of a tag. 1180 void ActOnTagDefinitionError(Scope *S, Decl *TagDecl); 1181 1182 EnumConstantDecl *CheckEnumConstant(EnumDecl *Enum, 1183 EnumConstantDecl *LastEnumConst, 1184 SourceLocation IdLoc, 1185 IdentifierInfo *Id, 1186 Expr *val); 1187 1188 Decl *ActOnEnumConstant(Scope *S, Decl *EnumDecl, Decl *LastEnumConstant, 1189 SourceLocation IdLoc, IdentifierInfo *Id, 1190 AttributeList *Attrs, 1191 SourceLocation EqualLoc, Expr *Val); 1192 void ActOnEnumBody(SourceLocation EnumLoc, SourceLocation LBraceLoc, 1193 SourceLocation RBraceLoc, Decl *EnumDecl, 1194 Decl **Elements, unsigned NumElements, 1195 Scope *S, AttributeList *Attr); 1196 1197 DeclContext *getContainingDC(DeclContext *DC); 1198 1199 /// Set the current declaration context until it gets popped. 1200 void PushDeclContext(Scope *S, DeclContext *DC); 1201 void PopDeclContext(); 1202 1203 /// EnterDeclaratorContext - Used when we must lookup names in the context 1204 /// of a declarator's nested name specifier. 1205 void EnterDeclaratorContext(Scope *S, DeclContext *DC); 1206 void ExitDeclaratorContext(Scope *S); 1207 1208 DeclContext *getFunctionLevelDeclContext(); 1209 1210 /// getCurFunctionDecl - If inside of a function body, this returns a pointer 1211 /// to the function decl for the function being parsed. If we're currently 1212 /// in a 'block', this returns the containing context. 1213 FunctionDecl *getCurFunctionDecl(); 1214 1215 /// getCurMethodDecl - If inside of a method body, this returns a pointer to 1216 /// the method decl for the method being parsed. If we're currently 1217 /// in a 'block', this returns the containing context. 1218 ObjCMethodDecl *getCurMethodDecl(); 1219 1220 /// getCurFunctionOrMethodDecl - Return the Decl for the current ObjC method 1221 /// or C function we're in, otherwise return null. If we're currently 1222 /// in a 'block', this returns the containing context. 1223 NamedDecl *getCurFunctionOrMethodDecl(); 1224 1225 /// Add this decl to the scope shadowed decl chains. 1226 void PushOnScopeChains(NamedDecl *D, Scope *S, bool AddToContext = true); 1227 1228 /// isDeclInScope - If 'Ctx' is a function/method, isDeclInScope returns true 1229 /// if 'D' is in Scope 'S', otherwise 'S' is ignored and isDeclInScope returns 1230 /// true if 'D' belongs to the given declaration context. 1231 /// 1232 /// \param ExplicitInstantiationOrSpecialization When true, we are checking 1233 /// whether the declaration is in scope for the purposes of explicit template 1234 /// instantiation or specialization. The default is false. 1235 bool isDeclInScope(NamedDecl *&D, DeclContext *Ctx, Scope *S = 0, 1236 bool ExplicitInstantiationOrSpecialization = false); 1237 1238 /// Finds the scope corresponding to the given decl context, if it 1239 /// happens to be an enclosing scope. Otherwise return NULL. 1240 static Scope *getScopeForDeclContext(Scope *S, DeclContext *DC); 1241 1242 /// Subroutines of ActOnDeclarator(). 1243 TypedefDecl *ParseTypedefDecl(Scope *S, Declarator &D, QualType T, 1244 TypeSourceInfo *TInfo); 1245 void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls); 1246 bool MergeFunctionDecl(FunctionDecl *New, Decl *Old); 1247 bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old); 1248 void mergeObjCMethodDecls(ObjCMethodDecl *New, const ObjCMethodDecl *Old); 1249 void MergeVarDecl(VarDecl *New, LookupResult &OldDecls); 1250 void MergeVarDeclTypes(VarDecl *New, VarDecl *Old); 1251 void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old); 1252 bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old); 1253 1254 // AssignmentAction - This is used by all the assignment diagnostic functions 1255 // to represent what is actually causing the operation 1256 enum AssignmentAction { 1257 AA_Assigning, 1258 AA_Passing, 1259 AA_Returning, 1260 AA_Converting, 1261 AA_Initializing, 1262 AA_Sending, 1263 AA_Casting 1264 }; 1265 1266 /// C++ Overloading. 1267 enum OverloadKind { 1268 /// This is a legitimate overload: the existing declarations are 1269 /// functions or function templates with different signatures. 1270 Ovl_Overload, 1271 1272 /// This is not an overload because the signature exactly matches 1273 /// an existing declaration. 1274 Ovl_Match, 1275 1276 /// This is not an overload because the lookup results contain a 1277 /// non-function. 1278 Ovl_NonFunction 1279 }; 1280 OverloadKind CheckOverload(Scope *S, 1281 FunctionDecl *New, 1282 const LookupResult &OldDecls, 1283 NamedDecl *&OldDecl, 1284 bool IsForUsingDecl); 1285 bool IsOverload(FunctionDecl *New, FunctionDecl *Old, bool IsForUsingDecl); 1286 1287 /// \brief Checks availability of the function depending on the current 1288 /// function context.Inside an unavailable function,unavailability is ignored. 1289 /// 1290 /// \returns true if \arg FD is unavailable and current context is inside 1291 /// an available function, false otherwise. 1292 bool isFunctionConsideredUnavailable(FunctionDecl *FD); 1293 1294 ImplicitConversionSequence 1295 TryImplicitConversion(Expr *From, QualType ToType, 1296 bool SuppressUserConversions, 1297 bool AllowExplicit, 1298 bool InOverloadResolution, 1299 bool CStyle, 1300 bool AllowObjCWritebackConversion); 1301 1302 bool IsIntegralPromotion(Expr *From, QualType FromType, QualType ToType); 1303 bool IsFloatingPointPromotion(QualType FromType, QualType ToType); 1304 bool IsComplexPromotion(QualType FromType, QualType ToType); 1305 bool IsPointerConversion(Expr *From, QualType FromType, QualType ToType, 1306 bool InOverloadResolution, 1307 QualType& ConvertedType, bool &IncompatibleObjC); 1308 bool isObjCPointerConversion(QualType FromType, QualType ToType, 1309 QualType& ConvertedType, bool &IncompatibleObjC); 1310 bool isObjCWritebackConversion(QualType FromType, QualType ToType, 1311 QualType &ConvertedType); 1312 bool IsBlockPointerConversion(QualType FromType, QualType ToType, 1313 QualType& ConvertedType); 1314 bool FunctionArgTypesAreEqual(const FunctionProtoType *OldType, 1315 const FunctionProtoType *NewType); 1316 1317 bool CheckPointerConversion(Expr *From, QualType ToType, 1318 CastKind &Kind, 1319 CXXCastPath& BasePath, 1320 bool IgnoreBaseAccess); 1321 bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType, 1322 bool InOverloadResolution, 1323 QualType &ConvertedType); 1324 bool CheckMemberPointerConversion(Expr *From, QualType ToType, 1325 CastKind &Kind, 1326 CXXCastPath &BasePath, 1327 bool IgnoreBaseAccess); 1328 bool IsQualificationConversion(QualType FromType, QualType ToType, 1329 bool CStyle, bool &ObjCLifetimeConversion); 1330 bool IsNoReturnConversion(QualType FromType, QualType ToType, 1331 QualType &ResultTy); 1332 bool DiagnoseMultipleUserDefinedConversion(Expr *From, QualType ToType); 1333 1334 1335 ExprResult PerformMoveOrCopyInitialization(const InitializedEntity &Entity, 1336 const VarDecl *NRVOCandidate, 1337 QualType ResultType, 1338 Expr *Value, 1339 bool AllowNRVO = true); 1340 1341 bool CanPerformCopyInitialization(const InitializedEntity &Entity, 1342 ExprResult Init); 1343 ExprResult PerformCopyInitialization(const InitializedEntity &Entity, 1344 SourceLocation EqualLoc, 1345 ExprResult Init, 1346 bool TopLevelOfInitList = false); 1347 ExprResult PerformObjectArgumentInitialization(Expr *From, 1348 NestedNameSpecifier *Qualifier, 1349 NamedDecl *FoundDecl, 1350 CXXMethodDecl *Method); 1351 1352 ExprResult PerformContextuallyConvertToBool(Expr *From); 1353 ExprResult PerformContextuallyConvertToObjCId(Expr *From); 1354 1355 ExprResult 1356 ConvertToIntegralOrEnumerationType(SourceLocation Loc, Expr *FromE, 1357 const PartialDiagnostic &NotIntDiag, 1358 const PartialDiagnostic &IncompleteDiag, 1359 const PartialDiagnostic &ExplicitConvDiag, 1360 const PartialDiagnostic &ExplicitConvNote, 1361 const PartialDiagnostic &AmbigDiag, 1362 const PartialDiagnostic &AmbigNote, 1363 const PartialDiagnostic &ConvDiag); 1364 1365 ExprResult PerformObjectMemberConversion(Expr *From, 1366 NestedNameSpecifier *Qualifier, 1367 NamedDecl *FoundDecl, 1368 NamedDecl *Member); 1369 1370 // Members have to be NamespaceDecl* or TranslationUnitDecl*. 1371 // TODO: make this is a typesafe union. 1372 typedef llvm::SmallPtrSet<DeclContext *, 16> AssociatedNamespaceSet; 1373 typedef llvm::SmallPtrSet<CXXRecordDecl *, 16> AssociatedClassSet; 1374 1375 void AddOverloadCandidate(NamedDecl *Function, 1376 DeclAccessPair FoundDecl, 1377 Expr **Args, unsigned NumArgs, 1378 OverloadCandidateSet &CandidateSet); 1379 1380 void AddOverloadCandidate(FunctionDecl *Function, 1381 DeclAccessPair FoundDecl, 1382 Expr **Args, unsigned NumArgs, 1383 OverloadCandidateSet& CandidateSet, 1384 bool SuppressUserConversions = false, 1385 bool PartialOverloading = false); 1386 void AddFunctionCandidates(const UnresolvedSetImpl &Functions, 1387 Expr **Args, unsigned NumArgs, 1388 OverloadCandidateSet& CandidateSet, 1389 bool SuppressUserConversions = false); 1390 void AddMethodCandidate(DeclAccessPair FoundDecl, 1391 QualType ObjectType, 1392 Expr::Classification ObjectClassification, 1393 Expr **Args, unsigned NumArgs, 1394 OverloadCandidateSet& CandidateSet, 1395 bool SuppressUserConversion = false); 1396 void AddMethodCandidate(CXXMethodDecl *Method, 1397 DeclAccessPair FoundDecl, 1398 CXXRecordDecl *ActingContext, QualType ObjectType, 1399 Expr::Classification ObjectClassification, 1400 Expr **Args, unsigned NumArgs, 1401 OverloadCandidateSet& CandidateSet, 1402 bool SuppressUserConversions = false); 1403 void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl, 1404 DeclAccessPair FoundDecl, 1405 CXXRecordDecl *ActingContext, 1406 TemplateArgumentListInfo *ExplicitTemplateArgs, 1407 QualType ObjectType, 1408 Expr::Classification ObjectClassification, 1409 Expr **Args, unsigned NumArgs, 1410 OverloadCandidateSet& CandidateSet, 1411 bool SuppressUserConversions = false); 1412 void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate, 1413 DeclAccessPair FoundDecl, 1414 TemplateArgumentListInfo *ExplicitTemplateArgs, 1415 Expr **Args, unsigned NumArgs, 1416 OverloadCandidateSet& CandidateSet, 1417 bool SuppressUserConversions = false); 1418 void AddConversionCandidate(CXXConversionDecl *Conversion, 1419 DeclAccessPair FoundDecl, 1420 CXXRecordDecl *ActingContext, 1421 Expr *From, QualType ToType, 1422 OverloadCandidateSet& CandidateSet); 1423 void AddTemplateConversionCandidate(FunctionTemplateDecl *FunctionTemplate, 1424 DeclAccessPair FoundDecl, 1425 CXXRecordDecl *ActingContext, 1426 Expr *From, QualType ToType, 1427 OverloadCandidateSet &CandidateSet); 1428 void AddSurrogateCandidate(CXXConversionDecl *Conversion, 1429 DeclAccessPair FoundDecl, 1430 CXXRecordDecl *ActingContext, 1431 const FunctionProtoType *Proto, 1432 Expr *Object, Expr **Args, unsigned NumArgs, 1433 OverloadCandidateSet& CandidateSet); 1434 void AddMemberOperatorCandidates(OverloadedOperatorKind Op, 1435 SourceLocation OpLoc, 1436 Expr **Args, unsigned NumArgs, 1437 OverloadCandidateSet& CandidateSet, 1438 SourceRange OpRange = SourceRange()); 1439 void AddBuiltinCandidate(QualType ResultTy, QualType *ParamTys, 1440 Expr **Args, unsigned NumArgs, 1441 OverloadCandidateSet& CandidateSet, 1442 bool IsAssignmentOperator = false, 1443 unsigned NumContextualBoolArguments = 0); 1444 void AddBuiltinOperatorCandidates(OverloadedOperatorKind Op, 1445 SourceLocation OpLoc, 1446 Expr **Args, unsigned NumArgs, 1447 OverloadCandidateSet& CandidateSet); 1448 void AddArgumentDependentLookupCandidates(DeclarationName Name, 1449 bool Operator, 1450 Expr **Args, unsigned NumArgs, 1451 TemplateArgumentListInfo *ExplicitTemplateArgs, 1452 OverloadCandidateSet& CandidateSet, 1453 bool PartialOverloading = false, 1454 bool StdNamespaceIsAssociated = false); 1455 1456 // Emit as a 'note' the specific overload candidate 1457 void NoteOverloadCandidate(FunctionDecl *Fn); 1458 1459 // Emit as a series of 'note's all template and non-templates 1460 // identified by the expression Expr 1461 void NoteAllOverloadCandidates(Expr* E); 1462 1463 // [PossiblyAFunctionType] --> [Return] 1464 // NonFunctionType --> NonFunctionType 1465 // R (A) --> R(A) 1466 // R (*)(A) --> R (A) 1467 // R (&)(A) --> R (A) 1468 // R (S::*)(A) --> R (A) 1469 QualType ExtractUnqualifiedFunctionType(QualType PossiblyAFunctionType); 1470 1471 FunctionDecl *ResolveAddressOfOverloadedFunction(Expr *AddressOfExpr, QualType TargetType, 1472 bool Complain, 1473 DeclAccessPair &Found); 1474 1475 FunctionDecl *ResolveSingleFunctionTemplateSpecialization(OverloadExpr *ovl, 1476 bool Complain = false, 1477 DeclAccessPair* Found = 0); 1478 1479 ExprResult ResolveAndFixSingleFunctionTemplateSpecialization( 1480 Expr *SrcExpr, bool DoFunctionPointerConverion = false, 1481 bool Complain = false, 1482 const SourceRange& OpRangeForComplaining = SourceRange(), 1483 QualType DestTypeForComplaining = QualType(), 1484 unsigned DiagIDForComplaining = 0); 1485 1486 1487 Expr *FixOverloadedFunctionReference(Expr *E, 1488 DeclAccessPair FoundDecl, 1489 FunctionDecl *Fn); 1490 ExprResult FixOverloadedFunctionReference(ExprResult, 1491 DeclAccessPair FoundDecl, 1492 FunctionDecl *Fn); 1493 1494 void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE, 1495 Expr **Args, unsigned NumArgs, 1496 OverloadCandidateSet &CandidateSet, 1497 bool PartialOverloading = false); 1498 1499 ExprResult BuildOverloadedCallExpr(Scope *S, Expr *Fn, 1500 UnresolvedLookupExpr *ULE, 1501 SourceLocation LParenLoc, 1502 Expr **Args, unsigned NumArgs, 1503 SourceLocation RParenLoc, 1504 Expr *ExecConfig); 1505 1506 ExprResult CreateOverloadedUnaryOp(SourceLocation OpLoc, 1507 unsigned Opc, 1508 const UnresolvedSetImpl &Fns, 1509 Expr *input); 1510 1511 ExprResult CreateOverloadedBinOp(SourceLocation OpLoc, 1512 unsigned Opc, 1513 const UnresolvedSetImpl &Fns, 1514 Expr *LHS, Expr *RHS); 1515 1516 ExprResult CreateOverloadedArraySubscriptExpr(SourceLocation LLoc, 1517 SourceLocation RLoc, 1518 Expr *Base,Expr *Idx); 1519 1520 ExprResult 1521 BuildCallToMemberFunction(Scope *S, Expr *MemExpr, 1522 SourceLocation LParenLoc, Expr **Args, 1523 unsigned NumArgs, SourceLocation RParenLoc); 1524 ExprResult 1525 BuildCallToObjectOfClassType(Scope *S, Expr *Object, SourceLocation LParenLoc, 1526 Expr **Args, unsigned NumArgs, 1527 SourceLocation RParenLoc); 1528 1529 ExprResult BuildOverloadedArrowExpr(Scope *S, Expr *Base, 1530 SourceLocation OpLoc); 1531 1532 /// CheckCallReturnType - Checks that a call expression's return type is 1533 /// complete. Returns true on failure. The location passed in is the location 1534 /// that best represents the call. 1535 bool CheckCallReturnType(QualType ReturnType, SourceLocation Loc, 1536 CallExpr *CE, FunctionDecl *FD); 1537 1538 /// Helpers for dealing with blocks and functions. 1539 bool CheckParmsForFunctionDef(ParmVarDecl **Param, ParmVarDecl **ParamEnd, 1540 bool CheckParameterNames); 1541 void CheckCXXDefaultArguments(FunctionDecl *FD); 1542 void CheckExtraCXXDefaultArguments(Declarator &D); 1543 Scope *getNonFieldDeclScope(Scope *S); 1544 1545 /// \name Name lookup 1546 /// 1547 /// These routines provide name lookup that is used during semantic 1548 /// analysis to resolve the various kinds of names (identifiers, 1549 /// overloaded operator names, constructor names, etc.) into zero or 1550 /// more declarations within a particular scope. The major entry 1551 /// points are LookupName, which performs unqualified name lookup, 1552 /// and LookupQualifiedName, which performs qualified name lookup. 1553 /// 1554 /// All name lookup is performed based on some specific criteria, 1555 /// which specify what names will be visible to name lookup and how 1556 /// far name lookup should work. These criteria are important both 1557 /// for capturing language semantics (certain lookups will ignore 1558 /// certain names, for example) and for performance, since name 1559 /// lookup is often a bottleneck in the compilation of C++. Name 1560 /// lookup criteria is specified via the LookupCriteria enumeration. 1561 /// 1562 /// The results of name lookup can vary based on the kind of name 1563 /// lookup performed, the current language, and the translation 1564 /// unit. In C, for example, name lookup will either return nothing 1565 /// (no entity found) or a single declaration. In C++, name lookup 1566 /// can additionally refer to a set of overloaded functions or 1567 /// result in an ambiguity. All of the possible results of name 1568 /// lookup are captured by the LookupResult class, which provides 1569 /// the ability to distinguish among them. 1570 //@{ 1571 1572 /// @brief Describes the kind of name lookup to perform. 1573 enum LookupNameKind { 1574 /// Ordinary name lookup, which finds ordinary names (functions, 1575 /// variables, typedefs, etc.) in C and most kinds of names 1576 /// (functions, variables, members, types, etc.) in C++. 1577 LookupOrdinaryName = 0, 1578 /// Tag name lookup, which finds the names of enums, classes, 1579 /// structs, and unions. 1580 LookupTagName, 1581 /// Label name lookup. 1582 LookupLabel, 1583 /// Member name lookup, which finds the names of 1584 /// class/struct/union members. 1585 LookupMemberName, 1586 /// Look up of an operator name (e.g., operator+) for use with 1587 /// operator overloading. This lookup is similar to ordinary name 1588 /// lookup, but will ignore any declarations that are class members. 1589 LookupOperatorName, 1590 /// Look up of a name that precedes the '::' scope resolution 1591 /// operator in C++. This lookup completely ignores operator, object, 1592 /// function, and enumerator names (C++ [basic.lookup.qual]p1). 1593 LookupNestedNameSpecifierName, 1594 /// Look up a namespace name within a C++ using directive or 1595 /// namespace alias definition, ignoring non-namespace names (C++ 1596 /// [basic.lookup.udir]p1). 1597 LookupNamespaceName, 1598 /// Look up all declarations in a scope with the given name, 1599 /// including resolved using declarations. This is appropriate 1600 /// for checking redeclarations for a using declaration. 1601 LookupUsingDeclName, 1602 /// Look up an ordinary name that is going to be redeclared as a 1603 /// name with linkage. This lookup ignores any declarations that 1604 /// are outside of the current scope unless they have linkage. See 1605 /// C99 6.2.2p4-5 and C++ [basic.link]p6. 1606 LookupRedeclarationWithLinkage, 1607 /// Look up the name of an Objective-C protocol. 1608 LookupObjCProtocolName, 1609 /// Look up implicit 'self' parameter of an objective-c method. 1610 LookupObjCImplicitSelfParam, 1611 /// \brief Look up any declaration with any name. 1612 LookupAnyName 1613 }; 1614 1615 /// \brief Specifies whether (or how) name lookup is being performed for a 1616 /// redeclaration (vs. a reference). 1617 enum RedeclarationKind { 1618 /// \brief The lookup is a reference to this name that is not for the 1619 /// purpose of redeclaring the name. 1620 NotForRedeclaration = 0, 1621 /// \brief The lookup results will be used for redeclaration of a name, 1622 /// if an entity by that name already exists. 1623 ForRedeclaration 1624 }; 1625 1626private: 1627 bool CppLookupName(LookupResult &R, Scope *S); 1628 1629 SpecialMemberOverloadResult *LookupSpecialMember(CXXRecordDecl *D, 1630 CXXSpecialMember SM, 1631 bool ConstArg, 1632 bool VolatileArg, 1633 bool RValueThis, 1634 bool ConstThis, 1635 bool VolatileThis); 1636 1637 // \brief The set of known/encountered (unique, canonicalized) NamespaceDecls. 1638 // 1639 // The boolean value will be true to indicate that the namespace was loaded 1640 // from an AST/PCH file, or false otherwise. 1641 llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces; 1642 1643 /// \brief Whether we have already loaded known namespaces from an extenal 1644 /// source. 1645 bool LoadedExternalKnownNamespaces; 1646 1647public: 1648 /// \brief Look up a name, looking for a single declaration. Return 1649 /// null if the results were absent, ambiguous, or overloaded. 1650 /// 1651 /// It is preferable to use the elaborated form and explicitly handle 1652 /// ambiguity and overloaded. 1653 NamedDecl *LookupSingleName(Scope *S, DeclarationName Name, 1654 SourceLocation Loc, 1655 LookupNameKind NameKind, 1656 RedeclarationKind Redecl 1657 = NotForRedeclaration); 1658 bool LookupName(LookupResult &R, Scope *S, 1659 bool AllowBuiltinCreation = false); 1660 bool LookupQualifiedName(LookupResult &R, DeclContext *LookupCtx, 1661 bool InUnqualifiedLookup = false); 1662 bool LookupParsedName(LookupResult &R, Scope *S, CXXScopeSpec *SS, 1663 bool AllowBuiltinCreation = false, 1664 bool EnteringContext = false); 1665 ObjCProtocolDecl *LookupProtocol(IdentifierInfo *II, SourceLocation IdLoc); 1666 1667 void LookupOverloadedOperatorName(OverloadedOperatorKind Op, Scope *S, 1668 QualType T1, QualType T2, 1669 UnresolvedSetImpl &Functions); 1670 1671 LabelDecl *LookupOrCreateLabel(IdentifierInfo *II, SourceLocation IdentLoc, 1672 SourceLocation GnuLabelLoc = SourceLocation()); 1673 1674 DeclContextLookupResult LookupConstructors(CXXRecordDecl *Class); 1675 CXXConstructorDecl *LookupDefaultConstructor(CXXRecordDecl *Class); 1676 CXXConstructorDecl *LookupCopyingConstructor(CXXRecordDecl *Class, 1677 unsigned Quals, 1678 bool *ConstParam = 0); 1679 CXXMethodDecl *LookupCopyingAssignment(CXXRecordDecl *Class, unsigned Quals, 1680 bool RValueThis, unsigned ThisQuals, 1681 bool *ConstParam = 0); 1682 CXXDestructorDecl *LookupDestructor(CXXRecordDecl *Class); 1683 1684 void ArgumentDependentLookup(DeclarationName Name, bool Operator, 1685 Expr **Args, unsigned NumArgs, 1686 ADLResult &Functions, 1687 bool StdNamespaceIsAssociated = false); 1688 1689 void LookupVisibleDecls(Scope *S, LookupNameKind Kind, 1690 VisibleDeclConsumer &Consumer, 1691 bool IncludeGlobalScope = true); 1692 void LookupVisibleDecls(DeclContext *Ctx, LookupNameKind Kind, 1693 VisibleDeclConsumer &Consumer, 1694 bool IncludeGlobalScope = true); 1695 1696 /// \brief The context in which typo-correction occurs. 1697 /// 1698 /// The typo-correction context affects which keywords (if any) are 1699 /// considered when trying to correct for typos. 1700 enum CorrectTypoContext { 1701 /// \brief An unknown context, where any keyword might be valid. 1702 CTC_Unknown, 1703 /// \brief A context where no keywords are used (e.g. we expect an actual 1704 /// name). 1705 CTC_NoKeywords, 1706 /// \brief A context where we're correcting a type name. 1707 CTC_Type, 1708 /// \brief An expression context. 1709 CTC_Expression, 1710 /// \brief A type cast, or anything else that can be followed by a '<'. 1711 CTC_CXXCasts, 1712 /// \brief A member lookup context. 1713 CTC_MemberLookup, 1714 /// \brief An Objective-C ivar lookup context (e.g., self->ivar). 1715 CTC_ObjCIvarLookup, 1716 /// \brief An Objective-C property lookup context (e.g., self.prop). 1717 CTC_ObjCPropertyLookup, 1718 /// \brief The receiver of an Objective-C message send within an 1719 /// Objective-C method where 'super' is a valid keyword. 1720 CTC_ObjCMessageReceiver 1721 }; 1722 1723 TypoCorrection CorrectTypo(const DeclarationNameInfo &Typo, 1724 Sema::LookupNameKind LookupKind, 1725 Scope *S, CXXScopeSpec *SS, 1726 DeclContext *MemberContext = NULL, 1727 bool EnteringContext = false, 1728 CorrectTypoContext CTC = CTC_Unknown, 1729 const ObjCObjectPointerType *OPT = NULL); 1730 1731 void FindAssociatedClassesAndNamespaces(Expr **Args, unsigned NumArgs, 1732 AssociatedNamespaceSet &AssociatedNamespaces, 1733 AssociatedClassSet &AssociatedClasses); 1734 1735 void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S, 1736 bool ConsiderLinkage, 1737 bool ExplicitInstantiationOrSpecialization); 1738 1739 bool DiagnoseAmbiguousLookup(LookupResult &Result); 1740 //@} 1741 1742 ObjCInterfaceDecl *getObjCInterfaceDecl(IdentifierInfo *&Id, 1743 SourceLocation IdLoc, 1744 bool TypoCorrection = false); 1745 NamedDecl *LazilyCreateBuiltin(IdentifierInfo *II, unsigned ID, 1746 Scope *S, bool ForRedeclaration, 1747 SourceLocation Loc); 1748 NamedDecl *ImplicitlyDefineFunction(SourceLocation Loc, IdentifierInfo &II, 1749 Scope *S); 1750 void AddKnownFunctionAttributes(FunctionDecl *FD); 1751 1752 // More parsing and symbol table subroutines. 1753 1754 // Decl attributes - this routine is the top level dispatcher. 1755 void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD, 1756 bool NonInheritable = true, bool Inheritable = true); 1757 void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL, 1758 bool NonInheritable = true, bool Inheritable = true); 1759 1760 bool CheckRegparmAttr(const AttributeList &attr, unsigned &value); 1761 bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC); 1762 bool CheckNoReturnAttr(const AttributeList &attr); 1763 1764 void WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method, 1765 bool &IncompleteImpl, unsigned DiagID); 1766 void WarnConflictingTypedMethods(ObjCMethodDecl *Method, 1767 ObjCMethodDecl *MethodDecl, 1768 bool IsProtocolMethodDecl, 1769 bool IsDeclaration = false); 1770 1771 bool isPropertyReadonly(ObjCPropertyDecl *PropertyDecl, 1772 ObjCInterfaceDecl *IDecl); 1773 1774 typedef llvm::DenseSet<Selector, llvm::DenseMapInfo<Selector> > SelectorSet; 1775 1776 /// CheckProtocolMethodDefs - This routine checks unimplemented 1777 /// methods declared in protocol, and those referenced by it. 1778 /// \param IDecl - Used for checking for methods which may have been 1779 /// inherited. 1780 void CheckProtocolMethodDefs(SourceLocation ImpLoc, 1781 ObjCProtocolDecl *PDecl, 1782 bool& IncompleteImpl, 1783 const SelectorSet &InsMap, 1784 const SelectorSet &ClsMap, 1785 ObjCContainerDecl *CDecl); 1786 1787 /// CheckImplementationIvars - This routine checks if the instance variables 1788 /// listed in the implelementation match those listed in the interface. 1789 void CheckImplementationIvars(ObjCImplementationDecl *ImpDecl, 1790 ObjCIvarDecl **Fields, unsigned nIvars, 1791 SourceLocation Loc); 1792 1793 /// \brief Determine whether we can synthesize a provisional ivar for the 1794 /// given name. 1795 ObjCPropertyDecl *canSynthesizeProvisionalIvar(IdentifierInfo *II); 1796 1797 /// \brief Determine whether we can synthesize a provisional ivar for the 1798 /// given property. 1799 bool canSynthesizeProvisionalIvar(ObjCPropertyDecl *Property); 1800 1801 /// ImplMethodsVsClassMethods - This is main routine to warn if any method 1802 /// remains unimplemented in the class or category @implementation. 1803 void ImplMethodsVsClassMethods(Scope *S, ObjCImplDecl* IMPDecl, 1804 ObjCContainerDecl* IDecl, 1805 bool IncompleteImpl = false); 1806 1807 /// DiagnoseUnimplementedProperties - This routine warns on those properties 1808 /// which must be implemented by this implementation. 1809 void DiagnoseUnimplementedProperties(Scope *S, ObjCImplDecl* IMPDecl, 1810 ObjCContainerDecl *CDecl, 1811 const SelectorSet &InsMap); 1812 1813 /// DefaultSynthesizeProperties - This routine default synthesizes all 1814 /// properties which must be synthesized in class's @implementation. 1815 void DefaultSynthesizeProperties (Scope *S, ObjCImplDecl* IMPDecl, 1816 ObjCInterfaceDecl *IDecl); 1817 1818 /// CollectImmediateProperties - This routine collects all properties in 1819 /// the class and its conforming protocols; but not those it its super class. 1820 void CollectImmediateProperties(ObjCContainerDecl *CDecl, 1821 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap, 1822 llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap); 1823 1824 1825 /// LookupPropertyDecl - Looks up a property in the current class and all 1826 /// its protocols. 1827 ObjCPropertyDecl *LookupPropertyDecl(const ObjCContainerDecl *CDecl, 1828 IdentifierInfo *II); 1829 1830 /// Called by ActOnProperty to handle @property declarations in 1831 //// class extensions. 1832 Decl *HandlePropertyInClassExtension(Scope *S, 1833 ObjCCategoryDecl *CDecl, 1834 SourceLocation AtLoc, 1835 FieldDeclarator &FD, 1836 Selector GetterSel, 1837 Selector SetterSel, 1838 const bool isAssign, 1839 const bool isReadWrite, 1840 const unsigned Attributes, 1841 bool *isOverridingProperty, 1842 TypeSourceInfo *T, 1843 tok::ObjCKeywordKind MethodImplKind); 1844 1845 /// Called by ActOnProperty and HandlePropertyInClassExtension to 1846 /// handle creating the ObjcPropertyDecl for a category or @interface. 1847 ObjCPropertyDecl *CreatePropertyDecl(Scope *S, 1848 ObjCContainerDecl *CDecl, 1849 SourceLocation AtLoc, 1850 FieldDeclarator &FD, 1851 Selector GetterSel, 1852 Selector SetterSel, 1853 const bool isAssign, 1854 const bool isReadWrite, 1855 const unsigned Attributes, 1856 TypeSourceInfo *T, 1857 tok::ObjCKeywordKind MethodImplKind, 1858 DeclContext *lexicalDC = 0); 1859 1860 /// AtomicPropertySetterGetterRules - This routine enforces the rule (via 1861 /// warning) when atomic property has one but not the other user-declared 1862 /// setter or getter. 1863 void AtomicPropertySetterGetterRules(ObjCImplDecl* IMPDecl, 1864 ObjCContainerDecl* IDecl); 1865 1866 void DiagnoseOwningPropertyGetterSynthesis(const ObjCImplementationDecl *D); 1867 1868 void DiagnoseDuplicateIvars(ObjCInterfaceDecl *ID, ObjCInterfaceDecl *SID); 1869 1870 enum MethodMatchStrategy { 1871 MMS_loose, 1872 MMS_strict 1873 }; 1874 1875 /// MatchTwoMethodDeclarations - Checks if two methods' type match and returns 1876 /// true, or false, accordingly. 1877 bool MatchTwoMethodDeclarations(const ObjCMethodDecl *Method, 1878 const ObjCMethodDecl *PrevMethod, 1879 MethodMatchStrategy strategy = MMS_strict); 1880 1881 /// MatchAllMethodDeclarations - Check methods declaraed in interface or 1882 /// or protocol against those declared in their implementations. 1883 void MatchAllMethodDeclarations(const SelectorSet &InsMap, 1884 const SelectorSet &ClsMap, 1885 SelectorSet &InsMapSeen, 1886 SelectorSet &ClsMapSeen, 1887 ObjCImplDecl* IMPDecl, 1888 ObjCContainerDecl* IDecl, 1889 bool &IncompleteImpl, 1890 bool ImmediateClass); 1891 1892 /// MatchMethodsInClassAndItsProtocol - Check that any redeclaration of 1893 /// method in protocol in its qualified class match in their type and 1894 /// issue warnings otherwise. 1895 void MatchMethodsInClassAndItsProtocol(const ObjCInterfaceDecl *CDecl); 1896 1897private: 1898 /// AddMethodToGlobalPool - Add an instance or factory method to the global 1899 /// pool. See descriptoin of AddInstanceMethodToGlobalPool. 1900 void AddMethodToGlobalPool(ObjCMethodDecl *Method, bool impl, bool instance); 1901 1902 /// LookupMethodInGlobalPool - Returns the instance or factory method and 1903 /// optionally warns if there are multiple signatures. 1904 ObjCMethodDecl *LookupMethodInGlobalPool(Selector Sel, SourceRange R, 1905 bool receiverIdOrClass, 1906 bool warn, bool instance); 1907 1908public: 1909 /// AddInstanceMethodToGlobalPool - All instance methods in a translation 1910 /// unit are added to a global pool. This allows us to efficiently associate 1911 /// a selector with a method declaraation for purposes of typechecking 1912 /// messages sent to "id" (where the class of the object is unknown). 1913 void AddInstanceMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1914 AddMethodToGlobalPool(Method, impl, /*instance*/true); 1915 } 1916 1917 /// AddFactoryMethodToGlobalPool - Same as above, but for factory methods. 1918 void AddFactoryMethodToGlobalPool(ObjCMethodDecl *Method, bool impl=false) { 1919 AddMethodToGlobalPool(Method, impl, /*instance*/false); 1920 } 1921 1922 /// LookupInstanceMethodInGlobalPool - Returns the method and warns if 1923 /// there are multiple signatures. 1924 ObjCMethodDecl *LookupInstanceMethodInGlobalPool(Selector Sel, SourceRange R, 1925 bool receiverIdOrClass=false, 1926 bool warn=true) { 1927 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1928 warn, /*instance*/true); 1929 } 1930 1931 /// LookupFactoryMethodInGlobalPool - Returns the method and warns if 1932 /// there are multiple signatures. 1933 ObjCMethodDecl *LookupFactoryMethodInGlobalPool(Selector Sel, SourceRange R, 1934 bool receiverIdOrClass=false, 1935 bool warn=true) { 1936 return LookupMethodInGlobalPool(Sel, R, receiverIdOrClass, 1937 warn, /*instance*/false); 1938 } 1939 1940 /// LookupImplementedMethodInGlobalPool - Returns the method which has an 1941 /// implementation. 1942 ObjCMethodDecl *LookupImplementedMethodInGlobalPool(Selector Sel); 1943 1944 /// CollectIvarsToConstructOrDestruct - Collect those ivars which require 1945 /// initialization. 1946 void CollectIvarsToConstructOrDestruct(ObjCInterfaceDecl *OI, 1947 SmallVectorImpl<ObjCIvarDecl*> &Ivars); 1948 1949 //===--------------------------------------------------------------------===// 1950 // Statement Parsing Callbacks: SemaStmt.cpp. 1951public: 1952 class FullExprArg { 1953 public: 1954 FullExprArg(Sema &actions) : E(0) { } 1955 1956 // FIXME: The const_cast here is ugly. RValue references would make this 1957 // much nicer (or we could duplicate a bunch of the move semantics 1958 // emulation code from Ownership.h). 1959 FullExprArg(const FullExprArg& Other) : E(Other.E) {} 1960 1961 ExprResult release() { 1962 return move(E); 1963 } 1964 1965 Expr *get() const { return E; } 1966 1967 Expr *operator->() { 1968 return E; 1969 } 1970 1971 private: 1972 // FIXME: No need to make the entire Sema class a friend when it's just 1973 // Sema::MakeFullExpr that needs access to the constructor below. 1974 friend class Sema; 1975 1976 explicit FullExprArg(Expr *expr) : E(expr) {} 1977 1978 Expr *E; 1979 }; 1980 1981 FullExprArg MakeFullExpr(Expr *Arg) { 1982 return FullExprArg(ActOnFinishFullExpr(Arg).release()); 1983 } 1984 1985 StmtResult ActOnExprStmt(FullExprArg Expr); 1986 1987 StmtResult ActOnNullStmt(SourceLocation SemiLoc, 1988 SourceLocation LeadingEmptyMacroLoc = SourceLocation()); 1989 StmtResult ActOnCompoundStmt(SourceLocation L, SourceLocation R, 1990 MultiStmtArg Elts, 1991 bool isStmtExpr); 1992 StmtResult ActOnDeclStmt(DeclGroupPtrTy Decl, 1993 SourceLocation StartLoc, 1994 SourceLocation EndLoc); 1995 void ActOnForEachDeclStmt(DeclGroupPtrTy Decl); 1996 StmtResult ActOnForEachLValueExpr(Expr *E); 1997 StmtResult ActOnCaseStmt(SourceLocation CaseLoc, Expr *LHSVal, 1998 SourceLocation DotDotDotLoc, Expr *RHSVal, 1999 SourceLocation ColonLoc); 2000 void ActOnCaseStmtBody(Stmt *CaseStmt, Stmt *SubStmt); 2001 2002 StmtResult ActOnDefaultStmt(SourceLocation DefaultLoc, 2003 SourceLocation ColonLoc, 2004 Stmt *SubStmt, Scope *CurScope); 2005 StmtResult ActOnLabelStmt(SourceLocation IdentLoc, LabelDecl *TheDecl, 2006 SourceLocation ColonLoc, Stmt *SubStmt); 2007 2008 StmtResult ActOnIfStmt(SourceLocation IfLoc, 2009 FullExprArg CondVal, Decl *CondVar, 2010 Stmt *ThenVal, 2011 SourceLocation ElseLoc, Stmt *ElseVal); 2012 StmtResult ActOnStartOfSwitchStmt(SourceLocation SwitchLoc, 2013 Expr *Cond, 2014 Decl *CondVar); 2015 StmtResult ActOnFinishSwitchStmt(SourceLocation SwitchLoc, 2016 Stmt *Switch, Stmt *Body); 2017 StmtResult ActOnWhileStmt(SourceLocation WhileLoc, 2018 FullExprArg Cond, 2019 Decl *CondVar, Stmt *Body); 2020 StmtResult ActOnDoStmt(SourceLocation DoLoc, Stmt *Body, 2021 SourceLocation WhileLoc, 2022 SourceLocation CondLParen, Expr *Cond, 2023 SourceLocation CondRParen); 2024 2025 StmtResult ActOnForStmt(SourceLocation ForLoc, 2026 SourceLocation LParenLoc, 2027 Stmt *First, FullExprArg Second, 2028 Decl *SecondVar, 2029 FullExprArg Third, 2030 SourceLocation RParenLoc, 2031 Stmt *Body); 2032 StmtResult ActOnObjCForCollectionStmt(SourceLocation ForColLoc, 2033 SourceLocation LParenLoc, 2034 Stmt *First, Expr *Second, 2035 SourceLocation RParenLoc, Stmt *Body); 2036 StmtResult ActOnCXXForRangeStmt(SourceLocation ForLoc, 2037 SourceLocation LParenLoc, Stmt *LoopVar, 2038 SourceLocation ColonLoc, Expr *Collection, 2039 SourceLocation RParenLoc); 2040 StmtResult BuildCXXForRangeStmt(SourceLocation ForLoc, 2041 SourceLocation ColonLoc, 2042 Stmt *RangeDecl, Stmt *BeginEndDecl, 2043 Expr *Cond, Expr *Inc, 2044 Stmt *LoopVarDecl, 2045 SourceLocation RParenLoc); 2046 StmtResult FinishCXXForRangeStmt(Stmt *ForRange, Stmt *Body); 2047 2048 StmtResult ActOnGotoStmt(SourceLocation GotoLoc, 2049 SourceLocation LabelLoc, 2050 LabelDecl *TheDecl); 2051 StmtResult ActOnIndirectGotoStmt(SourceLocation GotoLoc, 2052 SourceLocation StarLoc, 2053 Expr *DestExp); 2054 StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope); 2055 StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope); 2056 2057 const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E, 2058 bool AllowFunctionParameters); 2059 2060 StmtResult ActOnReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2061 StmtResult ActOnBlockReturnStmt(SourceLocation ReturnLoc, Expr *RetValExp); 2062 2063 StmtResult ActOnAsmStmt(SourceLocation AsmLoc, 2064 bool IsSimple, bool IsVolatile, 2065 unsigned NumOutputs, unsigned NumInputs, 2066 IdentifierInfo **Names, 2067 MultiExprArg Constraints, 2068 MultiExprArg Exprs, 2069 Expr *AsmString, 2070 MultiExprArg Clobbers, 2071 SourceLocation RParenLoc, 2072 bool MSAsm = false); 2073 2074 2075 VarDecl *BuildObjCExceptionDecl(TypeSourceInfo *TInfo, QualType ExceptionType, 2076 SourceLocation StartLoc, 2077 SourceLocation IdLoc, IdentifierInfo *Id, 2078 bool Invalid = false); 2079 2080 Decl *ActOnObjCExceptionDecl(Scope *S, Declarator &D); 2081 2082 StmtResult ActOnObjCAtCatchStmt(SourceLocation AtLoc, SourceLocation RParen, 2083 Decl *Parm, Stmt *Body); 2084 2085 StmtResult ActOnObjCAtFinallyStmt(SourceLocation AtLoc, Stmt *Body); 2086 2087 StmtResult ActOnObjCAtTryStmt(SourceLocation AtLoc, Stmt *Try, 2088 MultiStmtArg Catch, Stmt *Finally); 2089 2090 StmtResult BuildObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw); 2091 StmtResult ActOnObjCAtThrowStmt(SourceLocation AtLoc, Expr *Throw, 2092 Scope *CurScope); 2093 StmtResult ActOnObjCAtSynchronizedStmt(SourceLocation AtLoc, 2094 Expr *SynchExpr, 2095 Stmt *SynchBody); 2096 2097 StmtResult ActOnObjCAutoreleasePoolStmt(SourceLocation AtLoc, Stmt *Body); 2098 2099 VarDecl *BuildExceptionDeclaration(Scope *S, TypeSourceInfo *TInfo, 2100 SourceLocation StartLoc, 2101 SourceLocation IdLoc, 2102 IdentifierInfo *Id); 2103 2104 Decl *ActOnExceptionDeclarator(Scope *S, Declarator &D); 2105 2106 StmtResult ActOnCXXCatchBlock(SourceLocation CatchLoc, 2107 Decl *ExDecl, Stmt *HandlerBlock); 2108 StmtResult ActOnCXXTryBlock(SourceLocation TryLoc, Stmt *TryBlock, 2109 MultiStmtArg Handlers); 2110 2111 StmtResult ActOnSEHTryBlock(bool IsCXXTry, // try (true) or __try (false) ? 2112 SourceLocation TryLoc, 2113 Stmt *TryBlock, 2114 Stmt *Handler); 2115 2116 StmtResult ActOnSEHExceptBlock(SourceLocation Loc, 2117 Expr *FilterExpr, 2118 Stmt *Block); 2119 2120 StmtResult ActOnSEHFinallyBlock(SourceLocation Loc, 2121 Stmt *Block); 2122 2123 void DiagnoseReturnInConstructorExceptionHandler(CXXTryStmt *TryBlock); 2124 2125 bool ShouldWarnIfUnusedFileScopedDecl(const DeclaratorDecl *D) const; 2126 2127 /// \brief If it's a file scoped decl that must warn if not used, keep track 2128 /// of it. 2129 void MarkUnusedFileScopedDecl(const DeclaratorDecl *D); 2130 2131 /// DiagnoseUnusedExprResult - If the statement passed in is an expression 2132 /// whose result is unused, warn. 2133 void DiagnoseUnusedExprResult(const Stmt *S); 2134 void DiagnoseUnusedDecl(const NamedDecl *ND); 2135 2136 ParsingDeclState PushParsingDeclaration() { 2137 return DelayedDiagnostics.pushParsingDecl(); 2138 } 2139 void PopParsingDeclaration(ParsingDeclState state, Decl *decl) { 2140 DelayedDiagnostics::popParsingDecl(*this, state, decl); 2141 } 2142 2143 typedef ProcessingContextState ParsingClassState; 2144 ParsingClassState PushParsingClass() { 2145 return DelayedDiagnostics.pushContext(); 2146 } 2147 void PopParsingClass(ParsingClassState state) { 2148 DelayedDiagnostics.popContext(state); 2149 } 2150 2151 void EmitDeprecationWarning(NamedDecl *D, StringRef Message, 2152 SourceLocation Loc, 2153 const ObjCInterfaceDecl *UnknownObjCClass=0); 2154 2155 void HandleDelayedDeprecationCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 2156 2157 bool makeUnavailableInSystemHeader(SourceLocation loc, 2158 StringRef message); 2159 2160 //===--------------------------------------------------------------------===// 2161 // Expression Parsing Callbacks: SemaExpr.cpp. 2162 2163 bool DiagnoseUseOfDecl(NamedDecl *D, SourceLocation Loc, 2164 const ObjCInterfaceDecl *UnknownObjCClass=0); 2165 std::string getDeletedOrUnavailableSuffix(const FunctionDecl *FD); 2166 bool DiagnosePropertyAccessorMismatch(ObjCPropertyDecl *PD, 2167 ObjCMethodDecl *Getter, 2168 SourceLocation Loc); 2169 void DiagnoseSentinelCalls(NamedDecl *D, SourceLocation Loc, 2170 Expr **Args, unsigned NumArgs); 2171 2172 void PushExpressionEvaluationContext(ExpressionEvaluationContext NewContext); 2173 2174 void PopExpressionEvaluationContext(); 2175 2176 void DiscardCleanupsInEvaluationContext(); 2177 2178 void MarkDeclarationReferenced(SourceLocation Loc, Decl *D); 2179 void MarkDeclarationsReferencedInType(SourceLocation Loc, QualType T); 2180 void MarkDeclarationsReferencedInExpr(Expr *E); 2181 2182 /// \brief Figure out if an expression could be turned into a call. 2183 bool isExprCallable(const Expr &E, QualType &ZeroArgCallReturnTy, 2184 UnresolvedSetImpl &NonTemplateOverloads); 2185 /// \brief Give notes for a set of overloads. 2186 void NoteOverloads(const UnresolvedSetImpl &Overloads, 2187 const SourceLocation FinalNoteLoc); 2188 2189 /// \brief Conditionally issue a diagnostic based on the current 2190 /// evaluation context. 2191 /// 2192 /// \param stmt - If stmt is non-null, delay reporting the diagnostic until 2193 /// the function body is parsed, and then do a basic reachability analysis to 2194 /// determine if the statement is reachable. If it is unreachable, the 2195 /// diagnostic will not be emitted. 2196 bool DiagRuntimeBehavior(SourceLocation Loc, const Stmt *stmt, 2197 const PartialDiagnostic &PD); 2198 2199 // Primary Expressions. 2200 SourceRange getExprRange(Expr *E) const; 2201 2202 ObjCIvarDecl *SynthesizeProvisionalIvar(LookupResult &Lookup, 2203 IdentifierInfo *II, 2204 SourceLocation NameLoc); 2205 2206 ExprResult ActOnIdExpression(Scope *S, CXXScopeSpec &SS, UnqualifiedId &Name, 2207 bool HasTrailingLParen, bool IsAddressOfOperand); 2208 2209 void DecomposeUnqualifiedId(const UnqualifiedId &Id, 2210 TemplateArgumentListInfo &Buffer, 2211 DeclarationNameInfo &NameInfo, 2212 const TemplateArgumentListInfo *&TemplateArgs); 2213 2214 bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R, 2215 CorrectTypoContext CTC = CTC_Unknown); 2216 2217 ExprResult LookupInObjCMethod(LookupResult &R, Scope *S, IdentifierInfo *II, 2218 bool AllowBuiltinCreation=false); 2219 2220 ExprResult ActOnDependentIdExpression(const CXXScopeSpec &SS, 2221 const DeclarationNameInfo &NameInfo, 2222 bool isAddressOfOperand, 2223 const TemplateArgumentListInfo *TemplateArgs); 2224 2225 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2226 ExprValueKind VK, 2227 SourceLocation Loc, 2228 const CXXScopeSpec *SS = 0); 2229 ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty, 2230 ExprValueKind VK, 2231 const DeclarationNameInfo &NameInfo, 2232 const CXXScopeSpec *SS = 0); 2233 ExprResult 2234 BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS, 2235 SourceLocation nameLoc, 2236 IndirectFieldDecl *indirectField, 2237 Expr *baseObjectExpr = 0, 2238 SourceLocation opLoc = SourceLocation()); 2239 ExprResult BuildPossibleImplicitMemberExpr(const CXXScopeSpec &SS, 2240 LookupResult &R, 2241 const TemplateArgumentListInfo *TemplateArgs); 2242 ExprResult BuildImplicitMemberExpr(const CXXScopeSpec &SS, 2243 LookupResult &R, 2244 const TemplateArgumentListInfo *TemplateArgs, 2245 bool IsDefiniteInstance); 2246 bool UseArgumentDependentLookup(const CXXScopeSpec &SS, 2247 const LookupResult &R, 2248 bool HasTrailingLParen); 2249 2250 ExprResult BuildQualifiedDeclarationNameExpr(CXXScopeSpec &SS, 2251 const DeclarationNameInfo &NameInfo); 2252 ExprResult BuildDependentDeclRefExpr(const CXXScopeSpec &SS, 2253 const DeclarationNameInfo &NameInfo, 2254 const TemplateArgumentListInfo *TemplateArgs); 2255 2256 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2257 LookupResult &R, 2258 bool ADL); 2259 ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS, 2260 const DeclarationNameInfo &NameInfo, 2261 NamedDecl *D); 2262 2263 ExprResult ActOnPredefinedExpr(SourceLocation Loc, tok::TokenKind Kind); 2264 ExprResult ActOnNumericConstant(const Token &); 2265 ExprResult ActOnCharacterConstant(const Token &); 2266 ExprResult ActOnParenExpr(SourceLocation L, SourceLocation R, Expr *Val); 2267 ExprResult ActOnParenOrParenListExpr(SourceLocation L, 2268 SourceLocation R, 2269 MultiExprArg Val); 2270 2271 /// ActOnStringLiteral - The specified tokens were lexed as pasted string 2272 /// fragments (e.g. "foo" "bar" L"baz"). 2273 ExprResult ActOnStringLiteral(const Token *Toks, unsigned NumToks); 2274 2275 ExprResult ActOnGenericSelectionExpr(SourceLocation KeyLoc, 2276 SourceLocation DefaultLoc, 2277 SourceLocation RParenLoc, 2278 Expr *ControllingExpr, 2279 MultiTypeArg Types, 2280 MultiExprArg Exprs); 2281 ExprResult CreateGenericSelectionExpr(SourceLocation KeyLoc, 2282 SourceLocation DefaultLoc, 2283 SourceLocation RParenLoc, 2284 Expr *ControllingExpr, 2285 TypeSourceInfo **Types, 2286 Expr **Exprs, 2287 unsigned NumAssocs); 2288 2289 // Binary/Unary Operators. 'Tok' is the token for the operator. 2290 ExprResult CreateBuiltinUnaryOp(SourceLocation OpLoc, UnaryOperatorKind Opc, 2291 Expr *InputArg); 2292 ExprResult BuildUnaryOp(Scope *S, SourceLocation OpLoc, 2293 UnaryOperatorKind Opc, Expr *input); 2294 ExprResult ActOnUnaryOp(Scope *S, SourceLocation OpLoc, 2295 tok::TokenKind Op, Expr *Input); 2296 2297 ExprResult CreateUnaryExprOrTypeTraitExpr(TypeSourceInfo *T, 2298 SourceLocation OpLoc, 2299 UnaryExprOrTypeTrait ExprKind, 2300 SourceRange R); 2301 ExprResult CreateUnaryExprOrTypeTraitExpr(Expr *E, SourceLocation OpLoc, 2302 UnaryExprOrTypeTrait ExprKind); 2303 ExprResult 2304 ActOnUnaryExprOrTypeTraitExpr(SourceLocation OpLoc, 2305 UnaryExprOrTypeTrait ExprKind, 2306 bool isType, void *TyOrEx, 2307 const SourceRange &ArgRange); 2308 2309 ExprResult CheckPlaceholderExpr(Expr *E); 2310 bool CheckVecStepExpr(Expr *E); 2311 2312 bool CheckUnaryExprOrTypeTraitOperand(Expr *E, UnaryExprOrTypeTrait ExprKind); 2313 bool CheckUnaryExprOrTypeTraitOperand(QualType type, SourceLocation OpLoc, 2314 SourceRange R, 2315 UnaryExprOrTypeTrait ExprKind); 2316 ExprResult ActOnSizeofParameterPackExpr(Scope *S, 2317 SourceLocation OpLoc, 2318 IdentifierInfo &Name, 2319 SourceLocation NameLoc, 2320 SourceLocation RParenLoc); 2321 ExprResult ActOnPostfixUnaryOp(Scope *S, SourceLocation OpLoc, 2322 tok::TokenKind Kind, Expr *Input); 2323 2324 ExprResult ActOnArraySubscriptExpr(Scope *S, Expr *Base, SourceLocation LLoc, 2325 Expr *Idx, SourceLocation RLoc); 2326 ExprResult CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, 2327 Expr *Idx, SourceLocation RLoc); 2328 2329 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2330 SourceLocation OpLoc, bool IsArrow, 2331 CXXScopeSpec &SS, 2332 NamedDecl *FirstQualifierInScope, 2333 const DeclarationNameInfo &NameInfo, 2334 const TemplateArgumentListInfo *TemplateArgs); 2335 2336 ExprResult BuildMemberReferenceExpr(Expr *Base, QualType BaseType, 2337 SourceLocation OpLoc, bool IsArrow, 2338 const CXXScopeSpec &SS, 2339 NamedDecl *FirstQualifierInScope, 2340 LookupResult &R, 2341 const TemplateArgumentListInfo *TemplateArgs, 2342 bool SuppressQualifierCheck = false); 2343 2344 ExprResult LookupMemberExpr(LookupResult &R, ExprResult &Base, 2345 bool &IsArrow, SourceLocation OpLoc, 2346 CXXScopeSpec &SS, 2347 Decl *ObjCImpDecl, 2348 bool HasTemplateArgs); 2349 2350 bool CheckQualifiedMemberReference(Expr *BaseExpr, QualType BaseType, 2351 const CXXScopeSpec &SS, 2352 const LookupResult &R); 2353 2354 ExprResult ActOnDependentMemberExpr(Expr *Base, QualType BaseType, 2355 bool IsArrow, SourceLocation OpLoc, 2356 const CXXScopeSpec &SS, 2357 NamedDecl *FirstQualifierInScope, 2358 const DeclarationNameInfo &NameInfo, 2359 const TemplateArgumentListInfo *TemplateArgs); 2360 2361 ExprResult ActOnMemberAccessExpr(Scope *S, Expr *Base, 2362 SourceLocation OpLoc, 2363 tok::TokenKind OpKind, 2364 CXXScopeSpec &SS, 2365 UnqualifiedId &Member, 2366 Decl *ObjCImpDecl, 2367 bool HasTrailingLParen); 2368 2369 void ActOnDefaultCtorInitializers(Decl *CDtorDecl); 2370 bool ConvertArgumentsForCall(CallExpr *Call, Expr *Fn, 2371 FunctionDecl *FDecl, 2372 const FunctionProtoType *Proto, 2373 Expr **Args, unsigned NumArgs, 2374 SourceLocation RParenLoc); 2375 2376 /// ActOnCallExpr - Handle a call to Fn with the specified array of arguments. 2377 /// This provides the location of the left/right parens and a list of comma 2378 /// locations. 2379 ExprResult ActOnCallExpr(Scope *S, Expr *Fn, SourceLocation LParenLoc, 2380 MultiExprArg Args, SourceLocation RParenLoc, 2381 Expr *ExecConfig = 0); 2382 ExprResult BuildResolvedCallExpr(Expr *Fn, NamedDecl *NDecl, 2383 SourceLocation LParenLoc, 2384 Expr **Args, unsigned NumArgs, 2385 SourceLocation RParenLoc, 2386 Expr *ExecConfig = 0); 2387 2388 ExprResult ActOnCUDAExecConfigExpr(Scope *S, SourceLocation LLLLoc, 2389 MultiExprArg ExecConfig, SourceLocation GGGLoc); 2390 2391 ExprResult ActOnCastExpr(Scope *S, SourceLocation LParenLoc, 2392 Declarator &D, ParsedType &Ty, 2393 SourceLocation RParenLoc, Expr *Op); 2394 ExprResult BuildCStyleCastExpr(SourceLocation LParenLoc, 2395 TypeSourceInfo *Ty, 2396 SourceLocation RParenLoc, 2397 Expr *Op); 2398 2399 /// \brief Build an altivec or OpenCL literal. 2400 ExprResult BuildVectorLiteral(SourceLocation LParenLoc, 2401 SourceLocation RParenLoc, Expr *E, 2402 TypeSourceInfo *TInfo); 2403 2404 ExprResult MaybeConvertParenListExprToParenExpr(Scope *S, Expr *ME); 2405 2406 ExprResult ActOnCompoundLiteral(SourceLocation LParenLoc, 2407 ParsedType Ty, 2408 SourceLocation RParenLoc, 2409 Expr *Op); 2410 2411 ExprResult BuildCompoundLiteralExpr(SourceLocation LParenLoc, 2412 TypeSourceInfo *TInfo, 2413 SourceLocation RParenLoc, 2414 Expr *InitExpr); 2415 2416 ExprResult ActOnInitList(SourceLocation LParenLoc, 2417 MultiExprArg InitList, 2418 SourceLocation RParenLoc); 2419 2420 ExprResult ActOnDesignatedInitializer(Designation &Desig, 2421 SourceLocation Loc, 2422 bool GNUSyntax, 2423 ExprResult Init); 2424 2425 ExprResult ActOnBinOp(Scope *S, SourceLocation TokLoc, 2426 tok::TokenKind Kind, Expr *LHS, Expr *RHS); 2427 ExprResult BuildBinOp(Scope *S, SourceLocation OpLoc, 2428 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2429 ExprResult CreateBuiltinBinOp(SourceLocation TokLoc, 2430 BinaryOperatorKind Opc, Expr *lhs, Expr *rhs); 2431 2432 /// ActOnConditionalOp - Parse a ?: operation. Note that 'LHS' may be null 2433 /// in the case of a the GNU conditional expr extension. 2434 ExprResult ActOnConditionalOp(SourceLocation QuestionLoc, 2435 SourceLocation ColonLoc, 2436 Expr *Cond, Expr *LHS, Expr *RHS); 2437 2438 /// ActOnAddrLabel - Parse the GNU address of label extension: "&&foo". 2439 ExprResult ActOnAddrLabel(SourceLocation OpLoc, SourceLocation LabLoc, 2440 LabelDecl *LD); 2441 2442 ExprResult ActOnStmtExpr(SourceLocation LPLoc, Stmt *SubStmt, 2443 SourceLocation RPLoc); // "({..})" 2444 2445 // __builtin_offsetof(type, identifier(.identifier|[expr])*) 2446 struct OffsetOfComponent { 2447 SourceLocation LocStart, LocEnd; 2448 bool isBrackets; // true if [expr], false if .ident 2449 union { 2450 IdentifierInfo *IdentInfo; 2451 ExprTy *E; 2452 } U; 2453 }; 2454 2455 /// __builtin_offsetof(type, a.b[123][456].c) 2456 ExprResult BuildBuiltinOffsetOf(SourceLocation BuiltinLoc, 2457 TypeSourceInfo *TInfo, 2458 OffsetOfComponent *CompPtr, 2459 unsigned NumComponents, 2460 SourceLocation RParenLoc); 2461 ExprResult ActOnBuiltinOffsetOf(Scope *S, 2462 SourceLocation BuiltinLoc, 2463 SourceLocation TypeLoc, 2464 ParsedType Arg1, 2465 OffsetOfComponent *CompPtr, 2466 unsigned NumComponents, 2467 SourceLocation RParenLoc); 2468 2469 // __builtin_choose_expr(constExpr, expr1, expr2) 2470 ExprResult ActOnChooseExpr(SourceLocation BuiltinLoc, 2471 Expr *cond, Expr *expr1, 2472 Expr *expr2, SourceLocation RPLoc); 2473 2474 // __builtin_va_arg(expr, type) 2475 ExprResult ActOnVAArg(SourceLocation BuiltinLoc, 2476 Expr *expr, ParsedType type, 2477 SourceLocation RPLoc); 2478 ExprResult BuildVAArgExpr(SourceLocation BuiltinLoc, 2479 Expr *expr, TypeSourceInfo *TInfo, 2480 SourceLocation RPLoc); 2481 2482 // __null 2483 ExprResult ActOnGNUNullExpr(SourceLocation TokenLoc); 2484 2485 bool CheckCaseExpression(Expr *expr); 2486 2487 bool CheckMicrosoftIfExistsSymbol(CXXScopeSpec &SS, UnqualifiedId &Name); 2488 2489 //===------------------------- "Block" Extension ------------------------===// 2490 2491 /// ActOnBlockStart - This callback is invoked when a block literal is 2492 /// started. 2493 void ActOnBlockStart(SourceLocation CaretLoc, Scope *CurScope); 2494 2495 /// ActOnBlockArguments - This callback allows processing of block arguments. 2496 /// If there are no arguments, this is still invoked. 2497 void ActOnBlockArguments(Declarator &ParamInfo, Scope *CurScope); 2498 2499 /// ActOnBlockError - If there is an error parsing a block, this callback 2500 /// is invoked to pop the information about the block from the action impl. 2501 void ActOnBlockError(SourceLocation CaretLoc, Scope *CurScope); 2502 2503 /// ActOnBlockStmtExpr - This is called when the body of a block statement 2504 /// literal was successfully completed. ^(int x){...} 2505 ExprResult ActOnBlockStmtExpr(SourceLocation CaretLoc, 2506 Stmt *Body, Scope *CurScope); 2507 2508 //===---------------------------- OpenCL Features -----------------------===// 2509 2510 /// __builtin_astype(...) 2511 ExprResult ActOnAsTypeExpr(Expr *expr, ParsedType DestTy, 2512 SourceLocation BuiltinLoc, 2513 SourceLocation RParenLoc); 2514 2515 //===---------------------------- C++ Features --------------------------===// 2516 2517 // Act on C++ namespaces 2518 Decl *ActOnStartNamespaceDef(Scope *S, SourceLocation InlineLoc, 2519 SourceLocation NamespaceLoc, 2520 SourceLocation IdentLoc, 2521 IdentifierInfo *Ident, 2522 SourceLocation LBrace, 2523 AttributeList *AttrList); 2524 void ActOnFinishNamespaceDef(Decl *Dcl, SourceLocation RBrace); 2525 2526 NamespaceDecl *getStdNamespace() const; 2527 NamespaceDecl *getOrCreateStdNamespace(); 2528 2529 CXXRecordDecl *getStdBadAlloc() const; 2530 2531 Decl *ActOnUsingDirective(Scope *CurScope, 2532 SourceLocation UsingLoc, 2533 SourceLocation NamespcLoc, 2534 CXXScopeSpec &SS, 2535 SourceLocation IdentLoc, 2536 IdentifierInfo *NamespcName, 2537 AttributeList *AttrList); 2538 2539 void PushUsingDirective(Scope *S, UsingDirectiveDecl *UDir); 2540 2541 Decl *ActOnNamespaceAliasDef(Scope *CurScope, 2542 SourceLocation NamespaceLoc, 2543 SourceLocation AliasLoc, 2544 IdentifierInfo *Alias, 2545 CXXScopeSpec &SS, 2546 SourceLocation IdentLoc, 2547 IdentifierInfo *Ident); 2548 2549 void HideUsingShadowDecl(Scope *S, UsingShadowDecl *Shadow); 2550 bool CheckUsingShadowDecl(UsingDecl *UD, NamedDecl *Target, 2551 const LookupResult &PreviousDecls); 2552 UsingShadowDecl *BuildUsingShadowDecl(Scope *S, UsingDecl *UD, 2553 NamedDecl *Target); 2554 2555 bool CheckUsingDeclRedeclaration(SourceLocation UsingLoc, 2556 bool isTypeName, 2557 const CXXScopeSpec &SS, 2558 SourceLocation NameLoc, 2559 const LookupResult &Previous); 2560 bool CheckUsingDeclQualifier(SourceLocation UsingLoc, 2561 const CXXScopeSpec &SS, 2562 SourceLocation NameLoc); 2563 2564 NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS, 2565 SourceLocation UsingLoc, 2566 CXXScopeSpec &SS, 2567 const DeclarationNameInfo &NameInfo, 2568 AttributeList *AttrList, 2569 bool IsInstantiation, 2570 bool IsTypeName, 2571 SourceLocation TypenameLoc); 2572 2573 bool CheckInheritedConstructorUsingDecl(UsingDecl *UD); 2574 2575 Decl *ActOnUsingDeclaration(Scope *CurScope, 2576 AccessSpecifier AS, 2577 bool HasUsingKeyword, 2578 SourceLocation UsingLoc, 2579 CXXScopeSpec &SS, 2580 UnqualifiedId &Name, 2581 AttributeList *AttrList, 2582 bool IsTypeName, 2583 SourceLocation TypenameLoc); 2584 Decl *ActOnAliasDeclaration(Scope *CurScope, 2585 AccessSpecifier AS, 2586 MultiTemplateParamsArg TemplateParams, 2587 SourceLocation UsingLoc, 2588 UnqualifiedId &Name, 2589 TypeResult Type); 2590 2591 /// AddCXXDirectInitializerToDecl - This action is called immediately after 2592 /// ActOnDeclarator, when a C++ direct initializer is present. 2593 /// e.g: "int x(1);" 2594 void AddCXXDirectInitializerToDecl(Decl *Dcl, 2595 SourceLocation LParenLoc, 2596 MultiExprArg Exprs, 2597 SourceLocation RParenLoc, 2598 bool TypeMayContainAuto); 2599 2600 /// InitializeVarWithConstructor - Creates an CXXConstructExpr 2601 /// and sets it as the initializer for the the passed in VarDecl. 2602 bool InitializeVarWithConstructor(VarDecl *VD, 2603 CXXConstructorDecl *Constructor, 2604 MultiExprArg Exprs); 2605 2606 /// BuildCXXConstructExpr - Creates a complete call to a constructor, 2607 /// including handling of its default argument expressions. 2608 /// 2609 /// \param ConstructKind - a CXXConstructExpr::ConstructionKind 2610 ExprResult 2611 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2612 CXXConstructorDecl *Constructor, MultiExprArg Exprs, 2613 bool RequiresZeroInit, unsigned ConstructKind, 2614 SourceRange ParenRange); 2615 2616 // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if 2617 // the constructor can be elidable? 2618 ExprResult 2619 BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType, 2620 CXXConstructorDecl *Constructor, bool Elidable, 2621 MultiExprArg Exprs, bool RequiresZeroInit, 2622 unsigned ConstructKind, 2623 SourceRange ParenRange); 2624 2625 /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating 2626 /// the default expr if needed. 2627 ExprResult BuildCXXDefaultArgExpr(SourceLocation CallLoc, 2628 FunctionDecl *FD, 2629 ParmVarDecl *Param); 2630 2631 /// FinalizeVarWithDestructor - Prepare for calling destructor on the 2632 /// constructed variable. 2633 void FinalizeVarWithDestructor(VarDecl *VD, const RecordType *DeclInitType); 2634 2635 /// \brief Helper class that collects exception specifications for 2636 /// implicitly-declared special member functions. 2637 class ImplicitExceptionSpecification { 2638 // Pointer to allow copying 2639 ASTContext *Context; 2640 // We order exception specifications thus: 2641 // noexcept is the most restrictive, but is only used in C++0x. 2642 // throw() comes next. 2643 // Then a throw(collected exceptions) 2644 // Finally no specification. 2645 // throw(...) is used instead if any called function uses it. 2646 // 2647 // If this exception specification cannot be known yet (for instance, 2648 // because this is the exception specification for a defaulted default 2649 // constructor and we haven't finished parsing the deferred parts of the 2650 // class yet), the C++0x standard does not specify how to behave. We 2651 // record this as an 'unknown' exception specification, which overrules 2652 // any other specification (even 'none', to keep this rule simple). 2653 ExceptionSpecificationType ComputedEST; 2654 llvm::SmallPtrSet<CanQualType, 4> ExceptionsSeen; 2655 SmallVector<QualType, 4> Exceptions; 2656 2657 void ClearExceptions() { 2658 ExceptionsSeen.clear(); 2659 Exceptions.clear(); 2660 } 2661 2662 public: 2663 explicit ImplicitExceptionSpecification(ASTContext &Context) 2664 : Context(&Context), ComputedEST(EST_BasicNoexcept) { 2665 if (!Context.getLangOptions().CPlusPlus0x) 2666 ComputedEST = EST_DynamicNone; 2667 } 2668 2669 /// \brief Get the computed exception specification type. 2670 ExceptionSpecificationType getExceptionSpecType() const { 2671 assert(ComputedEST != EST_ComputedNoexcept && 2672 "noexcept(expr) should not be a possible result"); 2673 return ComputedEST; 2674 } 2675 2676 /// \brief The number of exceptions in the exception specification. 2677 unsigned size() const { return Exceptions.size(); } 2678 2679 /// \brief The set of exceptions in the exception specification. 2680 const QualType *data() const { return Exceptions.data(); } 2681 2682 /// \brief Integrate another called method into the collected data. 2683 void CalledDecl(CXXMethodDecl *Method); 2684 2685 /// \brief Integrate an invoked expression into the collected data. 2686 void CalledExpr(Expr *E); 2687 2688 /// \brief Specify that the exception specification can't be detemined yet. 2689 void SetDelayed() { 2690 ClearExceptions(); 2691 ComputedEST = EST_Delayed; 2692 } 2693 2694 FunctionProtoType::ExtProtoInfo getEPI() const { 2695 FunctionProtoType::ExtProtoInfo EPI; 2696 EPI.ExceptionSpecType = getExceptionSpecType(); 2697 EPI.NumExceptions = size(); 2698 EPI.Exceptions = data(); 2699 return EPI; 2700 } 2701 }; 2702 2703 /// \brief Determine what sort of exception specification a defaulted 2704 /// copy constructor of a class will have. 2705 ImplicitExceptionSpecification 2706 ComputeDefaultedDefaultCtorExceptionSpec(CXXRecordDecl *ClassDecl); 2707 2708 /// \brief Determine what sort of exception specification a defaulted 2709 /// default constructor of a class will have, and whether the parameter 2710 /// will be const. 2711 std::pair<ImplicitExceptionSpecification, bool> 2712 ComputeDefaultedCopyCtorExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2713 2714 /// \brief Determine what sort of exception specification a defautled 2715 /// copy assignment operator of a class will have, and whether the 2716 /// parameter will be const. 2717 std::pair<ImplicitExceptionSpecification, bool> 2718 ComputeDefaultedCopyAssignmentExceptionSpecAndConst(CXXRecordDecl *ClassDecl); 2719 2720 /// \brief Determine what sort of exception specification a defaulted 2721 /// destructor of a class will have. 2722 ImplicitExceptionSpecification 2723 ComputeDefaultedDtorExceptionSpec(CXXRecordDecl *ClassDecl); 2724 2725 /// \brief Determine if a defaulted default constructor ought to be 2726 /// deleted. 2727 bool ShouldDeleteDefaultConstructor(CXXConstructorDecl *CD); 2728 2729 /// \brief Determine if a defaulted copy constructor ought to be 2730 /// deleted. 2731 bool ShouldDeleteCopyConstructor(CXXConstructorDecl *CD); 2732 2733 /// \brief Determine if a defaulted copy assignment operator ought to be 2734 /// deleted. 2735 bool ShouldDeleteCopyAssignmentOperator(CXXMethodDecl *MD); 2736 2737 /// \brief Determine if a defaulted destructor ought to be deleted. 2738 bool ShouldDeleteDestructor(CXXDestructorDecl *DD); 2739 2740 /// \brief Declare the implicit default constructor for the given class. 2741 /// 2742 /// \param ClassDecl The class declaration into which the implicit 2743 /// default constructor will be added. 2744 /// 2745 /// \returns The implicitly-declared default constructor. 2746 CXXConstructorDecl *DeclareImplicitDefaultConstructor( 2747 CXXRecordDecl *ClassDecl); 2748 2749 /// DefineImplicitDefaultConstructor - Checks for feasibility of 2750 /// defining this constructor as the default constructor. 2751 void DefineImplicitDefaultConstructor(SourceLocation CurrentLocation, 2752 CXXConstructorDecl *Constructor); 2753 2754 /// \brief Declare the implicit destructor for the given class. 2755 /// 2756 /// \param ClassDecl The class declaration into which the implicit 2757 /// destructor will be added. 2758 /// 2759 /// \returns The implicitly-declared destructor. 2760 CXXDestructorDecl *DeclareImplicitDestructor(CXXRecordDecl *ClassDecl); 2761 2762 /// DefineImplicitDestructor - Checks for feasibility of 2763 /// defining this destructor as the default destructor. 2764 void DefineImplicitDestructor(SourceLocation CurrentLocation, 2765 CXXDestructorDecl *Destructor); 2766 2767 /// \brief Build an exception spec for destructors that don't have one. 2768 /// 2769 /// C++11 says that user-defined destructors with no exception spec get one 2770 /// that looks as if the destructor was implicitly declared. 2771 void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl, 2772 CXXDestructorDecl *Destructor); 2773 2774 /// \brief Declare all inherited constructors for the given class. 2775 /// 2776 /// \param ClassDecl The class declaration into which the inherited 2777 /// constructors will be added. 2778 void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl); 2779 2780 /// \brief Declare the implicit copy constructor for the given class. 2781 /// 2782 /// \param S The scope of the class, which may be NULL if this is a 2783 /// template instantiation. 2784 /// 2785 /// \param ClassDecl The class declaration into which the implicit 2786 /// copy constructor will be added. 2787 /// 2788 /// \returns The implicitly-declared copy constructor. 2789 CXXConstructorDecl *DeclareImplicitCopyConstructor(CXXRecordDecl *ClassDecl); 2790 2791 /// DefineImplicitCopyConstructor - Checks for feasibility of 2792 /// defining this constructor as the copy constructor. 2793 void DefineImplicitCopyConstructor(SourceLocation CurrentLocation, 2794 CXXConstructorDecl *Constructor); 2795 2796 /// \brief Declare the implicit copy assignment operator for the given class. 2797 /// 2798 /// \param S The scope of the class, which may be NULL if this is a 2799 /// template instantiation. 2800 /// 2801 /// \param ClassDecl The class declaration into which the implicit 2802 /// copy-assignment operator will be added. 2803 /// 2804 /// \returns The implicitly-declared copy assignment operator. 2805 CXXMethodDecl *DeclareImplicitCopyAssignment(CXXRecordDecl *ClassDecl); 2806 2807 /// \brief Defined an implicitly-declared copy assignment operator. 2808 void DefineImplicitCopyAssignment(SourceLocation CurrentLocation, 2809 CXXMethodDecl *MethodDecl); 2810 2811 /// \brief Force the declaration of any implicitly-declared members of this 2812 /// class. 2813 void ForceDeclarationOfImplicitMembers(CXXRecordDecl *Class); 2814 2815 /// MaybeBindToTemporary - If the passed in expression has a record type with 2816 /// a non-trivial destructor, this will return CXXBindTemporaryExpr. Otherwise 2817 /// it simply returns the passed in expression. 2818 ExprResult MaybeBindToTemporary(Expr *E); 2819 2820 bool CompleteConstructorCall(CXXConstructorDecl *Constructor, 2821 MultiExprArg ArgsPtr, 2822 SourceLocation Loc, 2823 ASTOwningVector<Expr*> &ConvertedArgs); 2824 2825 ParsedType getDestructorName(SourceLocation TildeLoc, 2826 IdentifierInfo &II, SourceLocation NameLoc, 2827 Scope *S, CXXScopeSpec &SS, 2828 ParsedType ObjectType, 2829 bool EnteringContext); 2830 2831 // Checks that reinterpret casts don't have undefined behavior. 2832 void CheckCompatibleReinterpretCast(QualType SrcType, QualType DestType, 2833 bool IsDereference, SourceRange Range); 2834 2835 /// ActOnCXXNamedCast - Parse {dynamic,static,reinterpret,const}_cast's. 2836 ExprResult ActOnCXXNamedCast(SourceLocation OpLoc, 2837 tok::TokenKind Kind, 2838 SourceLocation LAngleBracketLoc, 2839 Declarator &D, 2840 SourceLocation RAngleBracketLoc, 2841 SourceLocation LParenLoc, 2842 Expr *E, 2843 SourceLocation RParenLoc); 2844 2845 ExprResult BuildCXXNamedCast(SourceLocation OpLoc, 2846 tok::TokenKind Kind, 2847 TypeSourceInfo *Ty, 2848 Expr *E, 2849 SourceRange AngleBrackets, 2850 SourceRange Parens); 2851 2852 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2853 SourceLocation TypeidLoc, 2854 TypeSourceInfo *Operand, 2855 SourceLocation RParenLoc); 2856 ExprResult BuildCXXTypeId(QualType TypeInfoType, 2857 SourceLocation TypeidLoc, 2858 Expr *Operand, 2859 SourceLocation RParenLoc); 2860 2861 /// ActOnCXXTypeid - Parse typeid( something ). 2862 ExprResult ActOnCXXTypeid(SourceLocation OpLoc, 2863 SourceLocation LParenLoc, bool isType, 2864 void *TyOrExpr, 2865 SourceLocation RParenLoc); 2866 2867 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2868 SourceLocation TypeidLoc, 2869 TypeSourceInfo *Operand, 2870 SourceLocation RParenLoc); 2871 ExprResult BuildCXXUuidof(QualType TypeInfoType, 2872 SourceLocation TypeidLoc, 2873 Expr *Operand, 2874 SourceLocation RParenLoc); 2875 2876 /// ActOnCXXUuidof - Parse __uuidof( something ). 2877 ExprResult ActOnCXXUuidof(SourceLocation OpLoc, 2878 SourceLocation LParenLoc, bool isType, 2879 void *TyOrExpr, 2880 SourceLocation RParenLoc); 2881 2882 2883 //// ActOnCXXThis - Parse 'this' pointer. 2884 ExprResult ActOnCXXThis(SourceLocation loc); 2885 2886 /// getAndCaptureCurrentThisType - Try to capture a 'this' pointer. Returns 2887 /// the type of the 'this' pointer, or a null type if this is not possible. 2888 QualType getAndCaptureCurrentThisType(); 2889 2890 /// ActOnCXXBoolLiteral - Parse {true,false} literals. 2891 ExprResult ActOnCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind); 2892 2893 /// ActOnCXXNullPtrLiteral - Parse 'nullptr'. 2894 ExprResult ActOnCXXNullPtrLiteral(SourceLocation Loc); 2895 2896 //// ActOnCXXThrow - Parse throw expressions. 2897 ExprResult ActOnCXXThrow(Scope *S, SourceLocation OpLoc, Expr *expr); 2898 ExprResult BuildCXXThrow(SourceLocation OpLoc, Expr *Ex, 2899 bool IsThrownVarInScope); 2900 ExprResult CheckCXXThrowOperand(SourceLocation ThrowLoc, Expr *E, 2901 bool IsThrownVarInScope); 2902 2903 /// ActOnCXXTypeConstructExpr - Parse construction of a specified type. 2904 /// Can be interpreted either as function-style casting ("int(x)") 2905 /// or class type construction ("ClassType(x,y,z)") 2906 /// or creation of a value-initialized type ("int()"). 2907 ExprResult ActOnCXXTypeConstructExpr(ParsedType TypeRep, 2908 SourceLocation LParenLoc, 2909 MultiExprArg Exprs, 2910 SourceLocation RParenLoc); 2911 2912 ExprResult BuildCXXTypeConstructExpr(TypeSourceInfo *Type, 2913 SourceLocation LParenLoc, 2914 MultiExprArg Exprs, 2915 SourceLocation RParenLoc); 2916 2917 /// ActOnCXXNew - Parsed a C++ 'new' expression. 2918 ExprResult ActOnCXXNew(SourceLocation StartLoc, bool UseGlobal, 2919 SourceLocation PlacementLParen, 2920 MultiExprArg PlacementArgs, 2921 SourceLocation PlacementRParen, 2922 SourceRange TypeIdParens, Declarator &D, 2923 SourceLocation ConstructorLParen, 2924 MultiExprArg ConstructorArgs, 2925 SourceLocation ConstructorRParen); 2926 ExprResult BuildCXXNew(SourceLocation StartLoc, bool UseGlobal, 2927 SourceLocation PlacementLParen, 2928 MultiExprArg PlacementArgs, 2929 SourceLocation PlacementRParen, 2930 SourceRange TypeIdParens, 2931 QualType AllocType, 2932 TypeSourceInfo *AllocTypeInfo, 2933 Expr *ArraySize, 2934 SourceLocation ConstructorLParen, 2935 MultiExprArg ConstructorArgs, 2936 SourceLocation ConstructorRParen, 2937 bool TypeMayContainAuto = true); 2938 2939 bool CheckAllocatedType(QualType AllocType, SourceLocation Loc, 2940 SourceRange R); 2941 bool FindAllocationFunctions(SourceLocation StartLoc, SourceRange Range, 2942 bool UseGlobal, QualType AllocType, bool IsArray, 2943 Expr **PlaceArgs, unsigned NumPlaceArgs, 2944 FunctionDecl *&OperatorNew, 2945 FunctionDecl *&OperatorDelete); 2946 bool FindAllocationOverload(SourceLocation StartLoc, SourceRange Range, 2947 DeclarationName Name, Expr** Args, 2948 unsigned NumArgs, DeclContext *Ctx, 2949 bool AllowMissing, FunctionDecl *&Operator, 2950 bool Diagnose = true); 2951 void DeclareGlobalNewDelete(); 2952 void DeclareGlobalAllocationFunction(DeclarationName Name, QualType Return, 2953 QualType Argument, 2954 bool addMallocAttr = false); 2955 2956 bool FindDeallocationFunction(SourceLocation StartLoc, CXXRecordDecl *RD, 2957 DeclarationName Name, FunctionDecl* &Operator, 2958 bool Diagnose = true); 2959 2960 /// ActOnCXXDelete - Parsed a C++ 'delete' expression 2961 ExprResult ActOnCXXDelete(SourceLocation StartLoc, 2962 bool UseGlobal, bool ArrayForm, 2963 Expr *Operand); 2964 2965 DeclResult ActOnCXXConditionDeclaration(Scope *S, Declarator &D); 2966 ExprResult CheckConditionVariable(VarDecl *ConditionVar, 2967 SourceLocation StmtLoc, 2968 bool ConvertToBoolean); 2969 2970 ExprResult ActOnNoexceptExpr(SourceLocation KeyLoc, SourceLocation LParen, 2971 Expr *Operand, SourceLocation RParen); 2972 ExprResult BuildCXXNoexceptExpr(SourceLocation KeyLoc, Expr *Operand, 2973 SourceLocation RParen); 2974 2975 /// ActOnUnaryTypeTrait - Parsed one of the unary type trait support 2976 /// pseudo-functions. 2977 ExprResult ActOnUnaryTypeTrait(UnaryTypeTrait OTT, 2978 SourceLocation KWLoc, 2979 ParsedType Ty, 2980 SourceLocation RParen); 2981 2982 ExprResult BuildUnaryTypeTrait(UnaryTypeTrait OTT, 2983 SourceLocation KWLoc, 2984 TypeSourceInfo *T, 2985 SourceLocation RParen); 2986 2987 /// ActOnBinaryTypeTrait - Parsed one of the bianry type trait support 2988 /// pseudo-functions. 2989 ExprResult ActOnBinaryTypeTrait(BinaryTypeTrait OTT, 2990 SourceLocation KWLoc, 2991 ParsedType LhsTy, 2992 ParsedType RhsTy, 2993 SourceLocation RParen); 2994 2995 ExprResult BuildBinaryTypeTrait(BinaryTypeTrait BTT, 2996 SourceLocation KWLoc, 2997 TypeSourceInfo *LhsT, 2998 TypeSourceInfo *RhsT, 2999 SourceLocation RParen); 3000 3001 /// ActOnArrayTypeTrait - Parsed one of the bianry type trait support 3002 /// pseudo-functions. 3003 ExprResult ActOnArrayTypeTrait(ArrayTypeTrait ATT, 3004 SourceLocation KWLoc, 3005 ParsedType LhsTy, 3006 Expr *DimExpr, 3007 SourceLocation RParen); 3008 3009 ExprResult BuildArrayTypeTrait(ArrayTypeTrait ATT, 3010 SourceLocation KWLoc, 3011 TypeSourceInfo *TSInfo, 3012 Expr *DimExpr, 3013 SourceLocation RParen); 3014 3015 /// ActOnExpressionTrait - Parsed one of the unary type trait support 3016 /// pseudo-functions. 3017 ExprResult ActOnExpressionTrait(ExpressionTrait OET, 3018 SourceLocation KWLoc, 3019 Expr *Queried, 3020 SourceLocation RParen); 3021 3022 ExprResult BuildExpressionTrait(ExpressionTrait OET, 3023 SourceLocation KWLoc, 3024 Expr *Queried, 3025 SourceLocation RParen); 3026 3027 ExprResult ActOnStartCXXMemberReference(Scope *S, 3028 Expr *Base, 3029 SourceLocation OpLoc, 3030 tok::TokenKind OpKind, 3031 ParsedType &ObjectType, 3032 bool &MayBePseudoDestructor); 3033 3034 ExprResult DiagnoseDtorReference(SourceLocation NameLoc, Expr *MemExpr); 3035 3036 ExprResult BuildPseudoDestructorExpr(Expr *Base, 3037 SourceLocation OpLoc, 3038 tok::TokenKind OpKind, 3039 const CXXScopeSpec &SS, 3040 TypeSourceInfo *ScopeType, 3041 SourceLocation CCLoc, 3042 SourceLocation TildeLoc, 3043 PseudoDestructorTypeStorage DestroyedType, 3044 bool HasTrailingLParen); 3045 3046 ExprResult ActOnPseudoDestructorExpr(Scope *S, Expr *Base, 3047 SourceLocation OpLoc, 3048 tok::TokenKind OpKind, 3049 CXXScopeSpec &SS, 3050 UnqualifiedId &FirstTypeName, 3051 SourceLocation CCLoc, 3052 SourceLocation TildeLoc, 3053 UnqualifiedId &SecondTypeName, 3054 bool HasTrailingLParen); 3055 3056 /// MaybeCreateExprWithCleanups - If the current full-expression 3057 /// requires any cleanups, surround it with a ExprWithCleanups node. 3058 /// Otherwise, just returns the passed-in expression. 3059 Expr *MaybeCreateExprWithCleanups(Expr *SubExpr); 3060 Stmt *MaybeCreateStmtWithCleanups(Stmt *SubStmt); 3061 ExprResult MaybeCreateExprWithCleanups(ExprResult SubExpr); 3062 3063 ExprResult ActOnFinishFullExpr(Expr *Expr); 3064 StmtResult ActOnFinishFullStmt(Stmt *Stmt); 3065 3066 // Marks SS invalid if it represents an incomplete type. 3067 bool RequireCompleteDeclContext(CXXScopeSpec &SS, DeclContext *DC); 3068 3069 DeclContext *computeDeclContext(QualType T); 3070 DeclContext *computeDeclContext(const CXXScopeSpec &SS, 3071 bool EnteringContext = false); 3072 bool isDependentScopeSpecifier(const CXXScopeSpec &SS); 3073 CXXRecordDecl *getCurrentInstantiationOf(NestedNameSpecifier *NNS); 3074 bool isUnknownSpecialization(const CXXScopeSpec &SS); 3075 3076 /// \brief The parser has parsed a global nested-name-specifier '::'. 3077 /// 3078 /// \param S The scope in which this nested-name-specifier occurs. 3079 /// 3080 /// \param CCLoc The location of the '::'. 3081 /// 3082 /// \param SS The nested-name-specifier, which will be updated in-place 3083 /// to reflect the parsed nested-name-specifier. 3084 /// 3085 /// \returns true if an error occurred, false otherwise. 3086 bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc, 3087 CXXScopeSpec &SS); 3088 3089 bool isAcceptableNestedNameSpecifier(NamedDecl *SD); 3090 NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS); 3091 3092 bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS, 3093 SourceLocation IdLoc, 3094 IdentifierInfo &II, 3095 ParsedType ObjectType); 3096 3097 bool BuildCXXNestedNameSpecifier(Scope *S, 3098 IdentifierInfo &Identifier, 3099 SourceLocation IdentifierLoc, 3100 SourceLocation CCLoc, 3101 QualType ObjectType, 3102 bool EnteringContext, 3103 CXXScopeSpec &SS, 3104 NamedDecl *ScopeLookupResult, 3105 bool ErrorRecoveryLookup); 3106 3107 /// \brief The parser has parsed a nested-name-specifier 'identifier::'. 3108 /// 3109 /// \param S The scope in which this nested-name-specifier occurs. 3110 /// 3111 /// \param Identifier The identifier preceding the '::'. 3112 /// 3113 /// \param IdentifierLoc The location of the identifier. 3114 /// 3115 /// \param CCLoc The location of the '::'. 3116 /// 3117 /// \param ObjectType The type of the object, if we're parsing 3118 /// nested-name-specifier in a member access expression. 3119 /// 3120 /// \param EnteringContext Whether we're entering the context nominated by 3121 /// this nested-name-specifier. 3122 /// 3123 /// \param SS The nested-name-specifier, which is both an input 3124 /// parameter (the nested-name-specifier before this type) and an 3125 /// output parameter (containing the full nested-name-specifier, 3126 /// including this new type). 3127 /// 3128 /// \returns true if an error occurred, false otherwise. 3129 bool ActOnCXXNestedNameSpecifier(Scope *S, 3130 IdentifierInfo &Identifier, 3131 SourceLocation IdentifierLoc, 3132 SourceLocation CCLoc, 3133 ParsedType ObjectType, 3134 bool EnteringContext, 3135 CXXScopeSpec &SS); 3136 3137 bool IsInvalidUnlessNestedName(Scope *S, CXXScopeSpec &SS, 3138 IdentifierInfo &Identifier, 3139 SourceLocation IdentifierLoc, 3140 SourceLocation ColonLoc, 3141 ParsedType ObjectType, 3142 bool EnteringContext); 3143 3144 /// \brief The parser has parsed a nested-name-specifier 3145 /// 'template[opt] template-name < template-args >::'. 3146 /// 3147 /// \param S The scope in which this nested-name-specifier occurs. 3148 /// 3149 /// \param TemplateLoc The location of the 'template' keyword, if any. 3150 /// 3151 /// \param SS The nested-name-specifier, which is both an input 3152 /// parameter (the nested-name-specifier before this type) and an 3153 /// output parameter (containing the full nested-name-specifier, 3154 /// including this new type). 3155 /// 3156 /// \param TemplateLoc the location of the 'template' keyword, if any. 3157 /// \param TemplateName The template name. 3158 /// \param TemplateNameLoc The location of the template name. 3159 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3160 /// \param TemplateArgs The template arguments. 3161 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3162 /// \param CCLoc The location of the '::'. 3163 3164 /// \param EnteringContext Whether we're entering the context of the 3165 /// nested-name-specifier. 3166 /// 3167 /// 3168 /// \returns true if an error occurred, false otherwise. 3169 bool ActOnCXXNestedNameSpecifier(Scope *S, 3170 SourceLocation TemplateLoc, 3171 CXXScopeSpec &SS, 3172 TemplateTy Template, 3173 SourceLocation TemplateNameLoc, 3174 SourceLocation LAngleLoc, 3175 ASTTemplateArgsPtr TemplateArgs, 3176 SourceLocation RAngleLoc, 3177 SourceLocation CCLoc, 3178 bool EnteringContext); 3179 3180 /// \brief Given a C++ nested-name-specifier, produce an annotation value 3181 /// that the parser can use later to reconstruct the given 3182 /// nested-name-specifier. 3183 /// 3184 /// \param SS A nested-name-specifier. 3185 /// 3186 /// \returns A pointer containing all of the information in the 3187 /// nested-name-specifier \p SS. 3188 void *SaveNestedNameSpecifierAnnotation(CXXScopeSpec &SS); 3189 3190 /// \brief Given an annotation pointer for a nested-name-specifier, restore 3191 /// the nested-name-specifier structure. 3192 /// 3193 /// \param Annotation The annotation pointer, produced by 3194 /// \c SaveNestedNameSpecifierAnnotation(). 3195 /// 3196 /// \param AnnotationRange The source range corresponding to the annotation. 3197 /// 3198 /// \param SS The nested-name-specifier that will be updated with the contents 3199 /// of the annotation pointer. 3200 void RestoreNestedNameSpecifierAnnotation(void *Annotation, 3201 SourceRange AnnotationRange, 3202 CXXScopeSpec &SS); 3203 3204 bool ShouldEnterDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3205 3206 /// ActOnCXXEnterDeclaratorScope - Called when a C++ scope specifier (global 3207 /// scope or nested-name-specifier) is parsed, part of a declarator-id. 3208 /// After this method is called, according to [C++ 3.4.3p3], names should be 3209 /// looked up in the declarator-id's scope, until the declarator is parsed and 3210 /// ActOnCXXExitDeclaratorScope is called. 3211 /// The 'SS' should be a non-empty valid CXXScopeSpec. 3212 bool ActOnCXXEnterDeclaratorScope(Scope *S, CXXScopeSpec &SS); 3213 3214 /// ActOnCXXExitDeclaratorScope - Called when a declarator that previously 3215 /// invoked ActOnCXXEnterDeclaratorScope(), is finished. 'SS' is the same 3216 /// CXXScopeSpec that was passed to ActOnCXXEnterDeclaratorScope as well. 3217 /// Used to indicate that names should revert to being looked up in the 3218 /// defining scope. 3219 void ActOnCXXExitDeclaratorScope(Scope *S, const CXXScopeSpec &SS); 3220 3221 /// ActOnCXXEnterDeclInitializer - Invoked when we are about to parse an 3222 /// initializer for the declaration 'Dcl'. 3223 /// After this method is called, according to [C++ 3.4.1p13], if 'Dcl' is a 3224 /// static data member of class X, names should be looked up in the scope of 3225 /// class X. 3226 void ActOnCXXEnterDeclInitializer(Scope *S, Decl *Dcl); 3227 3228 /// ActOnCXXExitDeclInitializer - Invoked after we are finished parsing an 3229 /// initializer for the declaration 'Dcl'. 3230 void ActOnCXXExitDeclInitializer(Scope *S, Decl *Dcl); 3231 3232 // ParseObjCStringLiteral - Parse Objective-C string literals. 3233 ExprResult ParseObjCStringLiteral(SourceLocation *AtLocs, 3234 Expr **Strings, 3235 unsigned NumStrings); 3236 3237 ExprResult BuildObjCEncodeExpression(SourceLocation AtLoc, 3238 TypeSourceInfo *EncodedTypeInfo, 3239 SourceLocation RParenLoc); 3240 ExprResult BuildCXXMemberCallExpr(Expr *Exp, NamedDecl *FoundDecl, 3241 CXXMethodDecl *Method); 3242 3243 ExprResult ParseObjCEncodeExpression(SourceLocation AtLoc, 3244 SourceLocation EncodeLoc, 3245 SourceLocation LParenLoc, 3246 ParsedType Ty, 3247 SourceLocation RParenLoc); 3248 3249 // ParseObjCSelectorExpression - Build selector expression for @selector 3250 ExprResult ParseObjCSelectorExpression(Selector Sel, 3251 SourceLocation AtLoc, 3252 SourceLocation SelLoc, 3253 SourceLocation LParenLoc, 3254 SourceLocation RParenLoc); 3255 3256 // ParseObjCProtocolExpression - Build protocol expression for @protocol 3257 ExprResult ParseObjCProtocolExpression(IdentifierInfo * ProtocolName, 3258 SourceLocation AtLoc, 3259 SourceLocation ProtoLoc, 3260 SourceLocation LParenLoc, 3261 SourceLocation RParenLoc); 3262 3263 //===--------------------------------------------------------------------===// 3264 // C++ Declarations 3265 // 3266 Decl *ActOnStartLinkageSpecification(Scope *S, 3267 SourceLocation ExternLoc, 3268 SourceLocation LangLoc, 3269 StringRef Lang, 3270 SourceLocation LBraceLoc); 3271 Decl *ActOnFinishLinkageSpecification(Scope *S, 3272 Decl *LinkageSpec, 3273 SourceLocation RBraceLoc); 3274 3275 3276 //===--------------------------------------------------------------------===// 3277 // C++ Classes 3278 // 3279 bool isCurrentClassName(const IdentifierInfo &II, Scope *S, 3280 const CXXScopeSpec *SS = 0); 3281 3282 Decl *ActOnAccessSpecifier(AccessSpecifier Access, 3283 SourceLocation ASLoc, 3284 SourceLocation ColonLoc); 3285 3286 Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS, 3287 Declarator &D, 3288 MultiTemplateParamsArg TemplateParameterLists, 3289 Expr *BitfieldWidth, const VirtSpecifiers &VS, 3290 Expr *Init, bool HasDeferredInit, 3291 bool IsDefinition); 3292 void ActOnCXXInClassMemberInitializer(Decl *VarDecl, SourceLocation EqualLoc, 3293 Expr *Init); 3294 3295 MemInitResult ActOnMemInitializer(Decl *ConstructorD, 3296 Scope *S, 3297 CXXScopeSpec &SS, 3298 IdentifierInfo *MemberOrBase, 3299 ParsedType TemplateTypeTy, 3300 SourceLocation IdLoc, 3301 SourceLocation LParenLoc, 3302 Expr **Args, unsigned NumArgs, 3303 SourceLocation RParenLoc, 3304 SourceLocation EllipsisLoc); 3305 3306 MemInitResult BuildMemberInitializer(ValueDecl *Member, Expr **Args, 3307 unsigned NumArgs, SourceLocation IdLoc, 3308 SourceLocation LParenLoc, 3309 SourceLocation RParenLoc); 3310 3311 MemInitResult BuildBaseInitializer(QualType BaseType, 3312 TypeSourceInfo *BaseTInfo, 3313 Expr **Args, unsigned NumArgs, 3314 SourceLocation LParenLoc, 3315 SourceLocation RParenLoc, 3316 CXXRecordDecl *ClassDecl, 3317 SourceLocation EllipsisLoc); 3318 3319 MemInitResult BuildDelegatingInitializer(TypeSourceInfo *TInfo, 3320 Expr **Args, unsigned NumArgs, 3321 SourceLocation BaseLoc, 3322 SourceLocation RParenLoc, 3323 SourceLocation LParenLoc, 3324 CXXRecordDecl *ClassDecl); 3325 3326 bool SetDelegatingInitializer(CXXConstructorDecl *Constructor, 3327 CXXCtorInitializer *Initializer); 3328 3329 bool SetCtorInitializers(CXXConstructorDecl *Constructor, 3330 CXXCtorInitializer **Initializers, 3331 unsigned NumInitializers, bool AnyErrors); 3332 3333 void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation); 3334 3335 3336 /// MarkBaseAndMemberDestructorsReferenced - Given a record decl, 3337 /// mark all the non-trivial destructors of its members and bases as 3338 /// referenced. 3339 void MarkBaseAndMemberDestructorsReferenced(SourceLocation Loc, 3340 CXXRecordDecl *Record); 3341 3342 /// \brief The list of classes whose vtables have been used within 3343 /// this translation unit, and the source locations at which the 3344 /// first use occurred. 3345 typedef std::pair<CXXRecordDecl*, SourceLocation> VTableUse; 3346 3347 /// \brief The list of vtables that are required but have not yet been 3348 /// materialized. 3349 SmallVector<VTableUse, 16> VTableUses; 3350 3351 /// \brief The set of classes whose vtables have been used within 3352 /// this translation unit, and a bit that will be true if the vtable is 3353 /// required to be emitted (otherwise, it should be emitted only if needed 3354 /// by code generation). 3355 llvm::DenseMap<CXXRecordDecl *, bool> VTablesUsed; 3356 3357 /// \brief A list of all of the dynamic classes in this translation 3358 /// unit. 3359 SmallVector<CXXRecordDecl *, 16> DynamicClasses; 3360 3361 /// \brief Note that the vtable for the given class was used at the 3362 /// given location. 3363 void MarkVTableUsed(SourceLocation Loc, CXXRecordDecl *Class, 3364 bool DefinitionRequired = false); 3365 3366 /// MarkVirtualMembersReferenced - Will mark all members of the given 3367 /// CXXRecordDecl referenced. 3368 void MarkVirtualMembersReferenced(SourceLocation Loc, 3369 const CXXRecordDecl *RD); 3370 3371 /// \brief Define all of the vtables that have been used in this 3372 /// translation unit and reference any virtual members used by those 3373 /// vtables. 3374 /// 3375 /// \returns true if any work was done, false otherwise. 3376 bool DefineUsedVTables(); 3377 3378 void AddImplicitlyDeclaredMembersToClass(CXXRecordDecl *ClassDecl); 3379 3380 void ActOnMemInitializers(Decl *ConstructorDecl, 3381 SourceLocation ColonLoc, 3382 MemInitTy **MemInits, unsigned NumMemInits, 3383 bool AnyErrors); 3384 3385 void CheckCompletedCXXClass(CXXRecordDecl *Record); 3386 void ActOnFinishCXXMemberSpecification(Scope* S, SourceLocation RLoc, 3387 Decl *TagDecl, 3388 SourceLocation LBrac, 3389 SourceLocation RBrac, 3390 AttributeList *AttrList); 3391 3392 void ActOnReenterTemplateScope(Scope *S, Decl *Template); 3393 void ActOnReenterDeclaratorTemplateScope(Scope *S, DeclaratorDecl *D); 3394 void ActOnStartDelayedMemberDeclarations(Scope *S, Decl *Record); 3395 void ActOnStartDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3396 void ActOnDelayedCXXMethodParameter(Scope *S, Decl *Param); 3397 void ActOnFinishDelayedMemberDeclarations(Scope *S, Decl *Record); 3398 void ActOnFinishDelayedCXXMethodDeclaration(Scope *S, Decl *Method); 3399 void ActOnFinishDelayedMemberInitializers(Decl *Record); 3400 void MarkAsLateParsedTemplate(FunctionDecl *FD, bool Flag = true); 3401 bool IsInsideALocalClassWithinATemplateFunction(); 3402 3403 Decl *ActOnStaticAssertDeclaration(SourceLocation StaticAssertLoc, 3404 Expr *AssertExpr, 3405 Expr *AssertMessageExpr, 3406 SourceLocation RParenLoc); 3407 3408 FriendDecl *CheckFriendTypeDecl(SourceLocation FriendLoc, 3409 TypeSourceInfo *TSInfo); 3410 Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS, 3411 MultiTemplateParamsArg TemplateParams); 3412 Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D, bool IsDefinition, 3413 MultiTemplateParamsArg TemplateParams); 3414 3415 QualType CheckConstructorDeclarator(Declarator &D, QualType R, 3416 StorageClass& SC); 3417 void CheckConstructor(CXXConstructorDecl *Constructor); 3418 QualType CheckDestructorDeclarator(Declarator &D, QualType R, 3419 StorageClass& SC); 3420 bool CheckDestructor(CXXDestructorDecl *Destructor); 3421 void CheckConversionDeclarator(Declarator &D, QualType &R, 3422 StorageClass& SC); 3423 Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion); 3424 3425 void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record); 3426 void CheckExplicitlyDefaultedDefaultConstructor(CXXConstructorDecl *Ctor); 3427 void CheckExplicitlyDefaultedCopyConstructor(CXXConstructorDecl *Ctor); 3428 void CheckExplicitlyDefaultedCopyAssignment(CXXMethodDecl *Method); 3429 void CheckExplicitlyDefaultedDestructor(CXXDestructorDecl *Dtor); 3430 3431 //===--------------------------------------------------------------------===// 3432 // C++ Derived Classes 3433 // 3434 3435 /// ActOnBaseSpecifier - Parsed a base specifier 3436 CXXBaseSpecifier *CheckBaseSpecifier(CXXRecordDecl *Class, 3437 SourceRange SpecifierRange, 3438 bool Virtual, AccessSpecifier Access, 3439 TypeSourceInfo *TInfo, 3440 SourceLocation EllipsisLoc); 3441 3442 BaseResult ActOnBaseSpecifier(Decl *classdecl, 3443 SourceRange SpecifierRange, 3444 bool Virtual, AccessSpecifier Access, 3445 ParsedType basetype, 3446 SourceLocation BaseLoc, 3447 SourceLocation EllipsisLoc); 3448 3449 bool AttachBaseSpecifiers(CXXRecordDecl *Class, CXXBaseSpecifier **Bases, 3450 unsigned NumBases); 3451 void ActOnBaseSpecifiers(Decl *ClassDecl, BaseTy **Bases, unsigned NumBases); 3452 3453 bool IsDerivedFrom(QualType Derived, QualType Base); 3454 bool IsDerivedFrom(QualType Derived, QualType Base, CXXBasePaths &Paths); 3455 3456 // FIXME: I don't like this name. 3457 void BuildBasePathArray(const CXXBasePaths &Paths, CXXCastPath &BasePath); 3458 3459 bool BasePathInvolvesVirtualBase(const CXXCastPath &BasePath); 3460 3461 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3462 SourceLocation Loc, SourceRange Range, 3463 CXXCastPath *BasePath = 0, 3464 bool IgnoreAccess = false); 3465 bool CheckDerivedToBaseConversion(QualType Derived, QualType Base, 3466 unsigned InaccessibleBaseID, 3467 unsigned AmbigiousBaseConvID, 3468 SourceLocation Loc, SourceRange Range, 3469 DeclarationName Name, 3470 CXXCastPath *BasePath); 3471 3472 std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths); 3473 3474 /// CheckOverridingFunctionReturnType - Checks whether the return types are 3475 /// covariant, according to C++ [class.virtual]p5. 3476 bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New, 3477 const CXXMethodDecl *Old); 3478 3479 /// CheckOverridingFunctionExceptionSpec - Checks whether the exception 3480 /// spec is a subset of base spec. 3481 bool CheckOverridingFunctionExceptionSpec(const CXXMethodDecl *New, 3482 const CXXMethodDecl *Old); 3483 3484 bool CheckPureMethod(CXXMethodDecl *Method, SourceRange InitRange); 3485 3486 /// CheckOverrideControl - Check C++0x override control semantics. 3487 void CheckOverrideControl(const Decl *D); 3488 3489 /// CheckForFunctionMarkedFinal - Checks whether a virtual member function 3490 /// overrides a virtual member function marked 'final', according to 3491 /// C++0x [class.virtual]p3. 3492 bool CheckIfOverriddenFunctionIsMarkedFinal(const CXXMethodDecl *New, 3493 const CXXMethodDecl *Old); 3494 3495 3496 //===--------------------------------------------------------------------===// 3497 // C++ Access Control 3498 // 3499 3500 enum AccessResult { 3501 AR_accessible, 3502 AR_inaccessible, 3503 AR_dependent, 3504 AR_delayed 3505 }; 3506 3507 bool SetMemberAccessSpecifier(NamedDecl *MemberDecl, 3508 NamedDecl *PrevMemberDecl, 3509 AccessSpecifier LexicalAS); 3510 3511 AccessResult CheckUnresolvedMemberAccess(UnresolvedMemberExpr *E, 3512 DeclAccessPair FoundDecl); 3513 AccessResult CheckUnresolvedLookupAccess(UnresolvedLookupExpr *E, 3514 DeclAccessPair FoundDecl); 3515 AccessResult CheckAllocationAccess(SourceLocation OperatorLoc, 3516 SourceRange PlacementRange, 3517 CXXRecordDecl *NamingClass, 3518 DeclAccessPair FoundDecl, 3519 bool Diagnose = true); 3520 AccessResult CheckConstructorAccess(SourceLocation Loc, 3521 CXXConstructorDecl *D, 3522 const InitializedEntity &Entity, 3523 AccessSpecifier Access, 3524 bool IsCopyBindingRefToTemp = false); 3525 AccessResult CheckConstructorAccess(SourceLocation Loc, 3526 CXXConstructorDecl *D, 3527 AccessSpecifier Access, 3528 PartialDiagnostic PD); 3529 AccessResult CheckDestructorAccess(SourceLocation Loc, 3530 CXXDestructorDecl *Dtor, 3531 const PartialDiagnostic &PDiag); 3532 AccessResult CheckDirectMemberAccess(SourceLocation Loc, 3533 NamedDecl *D, 3534 const PartialDiagnostic &PDiag); 3535 AccessResult CheckMemberOperatorAccess(SourceLocation Loc, 3536 Expr *ObjectExpr, 3537 Expr *ArgExpr, 3538 DeclAccessPair FoundDecl); 3539 AccessResult CheckAddressOfMemberAccess(Expr *OvlExpr, 3540 DeclAccessPair FoundDecl); 3541 AccessResult CheckBaseClassAccess(SourceLocation AccessLoc, 3542 QualType Base, QualType Derived, 3543 const CXXBasePath &Path, 3544 unsigned DiagID, 3545 bool ForceCheck = false, 3546 bool ForceUnprivileged = false); 3547 void CheckLookupAccess(const LookupResult &R); 3548 3549 void HandleDependentAccessCheck(const DependentDiagnostic &DD, 3550 const MultiLevelTemplateArgumentList &TemplateArgs); 3551 void PerformDependentDiagnostics(const DeclContext *Pattern, 3552 const MultiLevelTemplateArgumentList &TemplateArgs); 3553 3554 void HandleDelayedAccessCheck(sema::DelayedDiagnostic &DD, Decl *Ctx); 3555 3556 /// A flag to suppress access checking. 3557 bool SuppressAccessChecking; 3558 3559 /// \brief When true, access checking violations are treated as SFINAE 3560 /// failures rather than hard errors. 3561 bool AccessCheckingSFINAE; 3562 3563 void ActOnStartSuppressingAccessChecks(); 3564 void ActOnStopSuppressingAccessChecks(); 3565 3566 enum AbstractDiagSelID { 3567 AbstractNone = -1, 3568 AbstractReturnType, 3569 AbstractParamType, 3570 AbstractVariableType, 3571 AbstractFieldType, 3572 AbstractArrayType 3573 }; 3574 3575 bool RequireNonAbstractType(SourceLocation Loc, QualType T, 3576 const PartialDiagnostic &PD); 3577 void DiagnoseAbstractType(const CXXRecordDecl *RD); 3578 3579 bool RequireNonAbstractType(SourceLocation Loc, QualType T, unsigned DiagID, 3580 AbstractDiagSelID SelID = AbstractNone); 3581 3582 //===--------------------------------------------------------------------===// 3583 // C++ Overloaded Operators [C++ 13.5] 3584 // 3585 3586 bool CheckOverloadedOperatorDeclaration(FunctionDecl *FnDecl); 3587 3588 bool CheckLiteralOperatorDeclaration(FunctionDecl *FnDecl); 3589 3590 //===--------------------------------------------------------------------===// 3591 // C++ Templates [C++ 14] 3592 // 3593 void FilterAcceptableTemplateNames(LookupResult &R); 3594 bool hasAnyAcceptableTemplateNames(LookupResult &R); 3595 3596 void LookupTemplateName(LookupResult &R, Scope *S, CXXScopeSpec &SS, 3597 QualType ObjectType, bool EnteringContext, 3598 bool &MemberOfUnknownSpecialization); 3599 3600 TemplateNameKind isTemplateName(Scope *S, 3601 CXXScopeSpec &SS, 3602 bool hasTemplateKeyword, 3603 UnqualifiedId &Name, 3604 ParsedType ObjectType, 3605 bool EnteringContext, 3606 TemplateTy &Template, 3607 bool &MemberOfUnknownSpecialization); 3608 3609 bool DiagnoseUnknownTemplateName(const IdentifierInfo &II, 3610 SourceLocation IILoc, 3611 Scope *S, 3612 const CXXScopeSpec *SS, 3613 TemplateTy &SuggestedTemplate, 3614 TemplateNameKind &SuggestedKind); 3615 3616 bool DiagnoseTemplateParameterShadow(SourceLocation Loc, Decl *PrevDecl); 3617 TemplateDecl *AdjustDeclIfTemplate(Decl *&Decl); 3618 3619 Decl *ActOnTypeParameter(Scope *S, bool Typename, bool Ellipsis, 3620 SourceLocation EllipsisLoc, 3621 SourceLocation KeyLoc, 3622 IdentifierInfo *ParamName, 3623 SourceLocation ParamNameLoc, 3624 unsigned Depth, unsigned Position, 3625 SourceLocation EqualLoc, 3626 ParsedType DefaultArg); 3627 3628 QualType CheckNonTypeTemplateParameterType(QualType T, SourceLocation Loc); 3629 Decl *ActOnNonTypeTemplateParameter(Scope *S, Declarator &D, 3630 unsigned Depth, 3631 unsigned Position, 3632 SourceLocation EqualLoc, 3633 Expr *DefaultArg); 3634 Decl *ActOnTemplateTemplateParameter(Scope *S, 3635 SourceLocation TmpLoc, 3636 TemplateParamsTy *Params, 3637 SourceLocation EllipsisLoc, 3638 IdentifierInfo *ParamName, 3639 SourceLocation ParamNameLoc, 3640 unsigned Depth, 3641 unsigned Position, 3642 SourceLocation EqualLoc, 3643 ParsedTemplateArgument DefaultArg); 3644 3645 TemplateParamsTy * 3646 ActOnTemplateParameterList(unsigned Depth, 3647 SourceLocation ExportLoc, 3648 SourceLocation TemplateLoc, 3649 SourceLocation LAngleLoc, 3650 Decl **Params, unsigned NumParams, 3651 SourceLocation RAngleLoc); 3652 3653 /// \brief The context in which we are checking a template parameter 3654 /// list. 3655 enum TemplateParamListContext { 3656 TPC_ClassTemplate, 3657 TPC_FunctionTemplate, 3658 TPC_ClassTemplateMember, 3659 TPC_FriendFunctionTemplate, 3660 TPC_FriendFunctionTemplateDefinition, 3661 TPC_TypeAliasTemplate 3662 }; 3663 3664 bool CheckTemplateParameterList(TemplateParameterList *NewParams, 3665 TemplateParameterList *OldParams, 3666 TemplateParamListContext TPC); 3667 TemplateParameterList * 3668 MatchTemplateParametersToScopeSpecifier(SourceLocation DeclStartLoc, 3669 SourceLocation DeclLoc, 3670 const CXXScopeSpec &SS, 3671 TemplateParameterList **ParamLists, 3672 unsigned NumParamLists, 3673 bool IsFriend, 3674 bool &IsExplicitSpecialization, 3675 bool &Invalid); 3676 3677 DeclResult CheckClassTemplate(Scope *S, unsigned TagSpec, TagUseKind TUK, 3678 SourceLocation KWLoc, CXXScopeSpec &SS, 3679 IdentifierInfo *Name, SourceLocation NameLoc, 3680 AttributeList *Attr, 3681 TemplateParameterList *TemplateParams, 3682 AccessSpecifier AS, 3683 unsigned NumOuterTemplateParamLists, 3684 TemplateParameterList **OuterTemplateParamLists); 3685 3686 void translateTemplateArguments(const ASTTemplateArgsPtr &In, 3687 TemplateArgumentListInfo &Out); 3688 3689 void NoteAllFoundTemplates(TemplateName Name); 3690 3691 QualType CheckTemplateIdType(TemplateName Template, 3692 SourceLocation TemplateLoc, 3693 TemplateArgumentListInfo &TemplateArgs); 3694 3695 TypeResult 3696 ActOnTemplateIdType(CXXScopeSpec &SS, 3697 TemplateTy Template, SourceLocation TemplateLoc, 3698 SourceLocation LAngleLoc, 3699 ASTTemplateArgsPtr TemplateArgs, 3700 SourceLocation RAngleLoc); 3701 3702 /// \brief Parsed an elaborated-type-specifier that refers to a template-id, 3703 /// such as \c class T::template apply<U>. 3704 /// 3705 /// \param TUK 3706 TypeResult ActOnTagTemplateIdType(TagUseKind TUK, 3707 TypeSpecifierType TagSpec, 3708 SourceLocation TagLoc, 3709 CXXScopeSpec &SS, 3710 TemplateTy TemplateD, 3711 SourceLocation TemplateLoc, 3712 SourceLocation LAngleLoc, 3713 ASTTemplateArgsPtr TemplateArgsIn, 3714 SourceLocation RAngleLoc); 3715 3716 3717 ExprResult BuildTemplateIdExpr(const CXXScopeSpec &SS, 3718 LookupResult &R, 3719 bool RequiresADL, 3720 const TemplateArgumentListInfo &TemplateArgs); 3721 ExprResult BuildQualifiedTemplateIdExpr(CXXScopeSpec &SS, 3722 const DeclarationNameInfo &NameInfo, 3723 const TemplateArgumentListInfo &TemplateArgs); 3724 3725 TemplateNameKind ActOnDependentTemplateName(Scope *S, 3726 SourceLocation TemplateKWLoc, 3727 CXXScopeSpec &SS, 3728 UnqualifiedId &Name, 3729 ParsedType ObjectType, 3730 bool EnteringContext, 3731 TemplateTy &Template); 3732 3733 DeclResult 3734 ActOnClassTemplateSpecialization(Scope *S, unsigned TagSpec, TagUseKind TUK, 3735 SourceLocation KWLoc, 3736 CXXScopeSpec &SS, 3737 TemplateTy Template, 3738 SourceLocation TemplateNameLoc, 3739 SourceLocation LAngleLoc, 3740 ASTTemplateArgsPtr TemplateArgs, 3741 SourceLocation RAngleLoc, 3742 AttributeList *Attr, 3743 MultiTemplateParamsArg TemplateParameterLists); 3744 3745 Decl *ActOnTemplateDeclarator(Scope *S, 3746 MultiTemplateParamsArg TemplateParameterLists, 3747 Declarator &D); 3748 3749 Decl *ActOnStartOfFunctionTemplateDef(Scope *FnBodyScope, 3750 MultiTemplateParamsArg TemplateParameterLists, 3751 Declarator &D); 3752 3753 bool 3754 CheckSpecializationInstantiationRedecl(SourceLocation NewLoc, 3755 TemplateSpecializationKind NewTSK, 3756 NamedDecl *PrevDecl, 3757 TemplateSpecializationKind PrevTSK, 3758 SourceLocation PrevPtOfInstantiation, 3759 bool &SuppressNew); 3760 3761 bool CheckDependentFunctionTemplateSpecialization(FunctionDecl *FD, 3762 const TemplateArgumentListInfo &ExplicitTemplateArgs, 3763 LookupResult &Previous); 3764 3765 bool CheckFunctionTemplateSpecialization(FunctionDecl *FD, 3766 TemplateArgumentListInfo *ExplicitTemplateArgs, 3767 LookupResult &Previous); 3768 bool CheckMemberSpecialization(NamedDecl *Member, LookupResult &Previous); 3769 3770 DeclResult 3771 ActOnExplicitInstantiation(Scope *S, 3772 SourceLocation ExternLoc, 3773 SourceLocation TemplateLoc, 3774 unsigned TagSpec, 3775 SourceLocation KWLoc, 3776 const CXXScopeSpec &SS, 3777 TemplateTy Template, 3778 SourceLocation TemplateNameLoc, 3779 SourceLocation LAngleLoc, 3780 ASTTemplateArgsPtr TemplateArgs, 3781 SourceLocation RAngleLoc, 3782 AttributeList *Attr); 3783 3784 DeclResult 3785 ActOnExplicitInstantiation(Scope *S, 3786 SourceLocation ExternLoc, 3787 SourceLocation TemplateLoc, 3788 unsigned TagSpec, 3789 SourceLocation KWLoc, 3790 CXXScopeSpec &SS, 3791 IdentifierInfo *Name, 3792 SourceLocation NameLoc, 3793 AttributeList *Attr); 3794 3795 DeclResult ActOnExplicitInstantiation(Scope *S, 3796 SourceLocation ExternLoc, 3797 SourceLocation TemplateLoc, 3798 Declarator &D); 3799 3800 TemplateArgumentLoc 3801 SubstDefaultTemplateArgumentIfAvailable(TemplateDecl *Template, 3802 SourceLocation TemplateLoc, 3803 SourceLocation RAngleLoc, 3804 Decl *Param, 3805 SmallVectorImpl<TemplateArgument> &Converted); 3806 3807 /// \brief Specifies the context in which a particular template 3808 /// argument is being checked. 3809 enum CheckTemplateArgumentKind { 3810 /// \brief The template argument was specified in the code or was 3811 /// instantiated with some deduced template arguments. 3812 CTAK_Specified, 3813 3814 /// \brief The template argument was deduced via template argument 3815 /// deduction. 3816 CTAK_Deduced, 3817 3818 /// \brief The template argument was deduced from an array bound 3819 /// via template argument deduction. 3820 CTAK_DeducedFromArrayBound 3821 }; 3822 3823 bool CheckTemplateArgument(NamedDecl *Param, 3824 const TemplateArgumentLoc &Arg, 3825 NamedDecl *Template, 3826 SourceLocation TemplateLoc, 3827 SourceLocation RAngleLoc, 3828 unsigned ArgumentPackIndex, 3829 SmallVectorImpl<TemplateArgument> &Converted, 3830 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3831 3832 /// \brief Check that the given template arguments can be be provided to 3833 /// the given template, converting the arguments along the way. 3834 /// 3835 /// \param Template The template to which the template arguments are being 3836 /// provided. 3837 /// 3838 /// \param TemplateLoc The location of the template name in the source. 3839 /// 3840 /// \param TemplateArgs The list of template arguments. If the template is 3841 /// a template template parameter, this function may extend the set of 3842 /// template arguments to also include substituted, defaulted template 3843 /// arguments. 3844 /// 3845 /// \param PartialTemplateArgs True if the list of template arguments is 3846 /// intentionally partial, e.g., because we're checking just the initial 3847 /// set of template arguments. 3848 /// 3849 /// \param Converted Will receive the converted, canonicalized template 3850 /// arguments. 3851 /// 3852 /// \returns True if an error occurred, false otherwise. 3853 bool CheckTemplateArgumentList(TemplateDecl *Template, 3854 SourceLocation TemplateLoc, 3855 TemplateArgumentListInfo &TemplateArgs, 3856 bool PartialTemplateArgs, 3857 SmallVectorImpl<TemplateArgument> &Converted); 3858 3859 bool CheckTemplateTypeArgument(TemplateTypeParmDecl *Param, 3860 const TemplateArgumentLoc &Arg, 3861 SmallVectorImpl<TemplateArgument> &Converted); 3862 3863 bool CheckTemplateArgument(TemplateTypeParmDecl *Param, 3864 TypeSourceInfo *Arg); 3865 bool CheckTemplateArgumentPointerToMember(Expr *Arg, 3866 TemplateArgument &Converted); 3867 ExprResult CheckTemplateArgument(NonTypeTemplateParmDecl *Param, 3868 QualType InstantiatedParamType, Expr *Arg, 3869 TemplateArgument &Converted, 3870 CheckTemplateArgumentKind CTAK = CTAK_Specified); 3871 bool CheckTemplateArgument(TemplateTemplateParmDecl *Param, 3872 const TemplateArgumentLoc &Arg); 3873 3874 ExprResult 3875 BuildExpressionFromDeclTemplateArgument(const TemplateArgument &Arg, 3876 QualType ParamType, 3877 SourceLocation Loc); 3878 ExprResult 3879 BuildExpressionFromIntegralTemplateArgument(const TemplateArgument &Arg, 3880 SourceLocation Loc); 3881 3882 /// \brief Enumeration describing how template parameter lists are compared 3883 /// for equality. 3884 enum TemplateParameterListEqualKind { 3885 /// \brief We are matching the template parameter lists of two templates 3886 /// that might be redeclarations. 3887 /// 3888 /// \code 3889 /// template<typename T> struct X; 3890 /// template<typename T> struct X; 3891 /// \endcode 3892 TPL_TemplateMatch, 3893 3894 /// \brief We are matching the template parameter lists of two template 3895 /// template parameters as part of matching the template parameter lists 3896 /// of two templates that might be redeclarations. 3897 /// 3898 /// \code 3899 /// template<template<int I> class TT> struct X; 3900 /// template<template<int Value> class Other> struct X; 3901 /// \endcode 3902 TPL_TemplateTemplateParmMatch, 3903 3904 /// \brief We are matching the template parameter lists of a template 3905 /// template argument against the template parameter lists of a template 3906 /// template parameter. 3907 /// 3908 /// \code 3909 /// template<template<int Value> class Metafun> struct X; 3910 /// template<int Value> struct integer_c; 3911 /// X<integer_c> xic; 3912 /// \endcode 3913 TPL_TemplateTemplateArgumentMatch 3914 }; 3915 3916 bool TemplateParameterListsAreEqual(TemplateParameterList *New, 3917 TemplateParameterList *Old, 3918 bool Complain, 3919 TemplateParameterListEqualKind Kind, 3920 SourceLocation TemplateArgLoc 3921 = SourceLocation()); 3922 3923 bool CheckTemplateDeclScope(Scope *S, TemplateParameterList *TemplateParams); 3924 3925 /// \brief Called when the parser has parsed a C++ typename 3926 /// specifier, e.g., "typename T::type". 3927 /// 3928 /// \param S The scope in which this typename type occurs. 3929 /// \param TypenameLoc the location of the 'typename' keyword 3930 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3931 /// \param II the identifier we're retrieving (e.g., 'type' in the example). 3932 /// \param IdLoc the location of the identifier. 3933 TypeResult 3934 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3935 const CXXScopeSpec &SS, const IdentifierInfo &II, 3936 SourceLocation IdLoc); 3937 3938 /// \brief Called when the parser has parsed a C++ typename 3939 /// specifier that ends in a template-id, e.g., 3940 /// "typename MetaFun::template apply<T1, T2>". 3941 /// 3942 /// \param S The scope in which this typename type occurs. 3943 /// \param TypenameLoc the location of the 'typename' keyword 3944 /// \param SS the nested-name-specifier following the typename (e.g., 'T::'). 3945 /// \param TemplateLoc the location of the 'template' keyword, if any. 3946 /// \param TemplateName The template name. 3947 /// \param TemplateNameLoc The location of the template name. 3948 /// \param LAngleLoc The location of the opening angle bracket ('<'). 3949 /// \param TemplateArgs The template arguments. 3950 /// \param RAngleLoc The location of the closing angle bracket ('>'). 3951 TypeResult 3952 ActOnTypenameType(Scope *S, SourceLocation TypenameLoc, 3953 const CXXScopeSpec &SS, 3954 SourceLocation TemplateLoc, 3955 TemplateTy Template, 3956 SourceLocation TemplateNameLoc, 3957 SourceLocation LAngleLoc, 3958 ASTTemplateArgsPtr TemplateArgs, 3959 SourceLocation RAngleLoc); 3960 3961 QualType CheckTypenameType(ElaboratedTypeKeyword Keyword, 3962 SourceLocation KeywordLoc, 3963 NestedNameSpecifierLoc QualifierLoc, 3964 const IdentifierInfo &II, 3965 SourceLocation IILoc); 3966 3967 TypeSourceInfo *RebuildTypeInCurrentInstantiation(TypeSourceInfo *T, 3968 SourceLocation Loc, 3969 DeclarationName Name); 3970 bool RebuildNestedNameSpecifierInCurrentInstantiation(CXXScopeSpec &SS); 3971 3972 ExprResult RebuildExprInCurrentInstantiation(Expr *E); 3973 3974 std::string 3975 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3976 const TemplateArgumentList &Args); 3977 3978 std::string 3979 getTemplateArgumentBindingsText(const TemplateParameterList *Params, 3980 const TemplateArgument *Args, 3981 unsigned NumArgs); 3982 3983 //===--------------------------------------------------------------------===// 3984 // C++ Variadic Templates (C++0x [temp.variadic]) 3985 //===--------------------------------------------------------------------===// 3986 3987 /// \brief The context in which an unexpanded parameter pack is 3988 /// being diagnosed. 3989 /// 3990 /// Note that the values of this enumeration line up with the first 3991 /// argument to the \c err_unexpanded_parameter_pack diagnostic. 3992 enum UnexpandedParameterPackContext { 3993 /// \brief An arbitrary expression. 3994 UPPC_Expression = 0, 3995 3996 /// \brief The base type of a class type. 3997 UPPC_BaseType, 3998 3999 /// \brief The type of an arbitrary declaration. 4000 UPPC_DeclarationType, 4001 4002 /// \brief The type of a data member. 4003 UPPC_DataMemberType, 4004 4005 /// \brief The size of a bit-field. 4006 UPPC_BitFieldWidth, 4007 4008 /// \brief The expression in a static assertion. 4009 UPPC_StaticAssertExpression, 4010 4011 /// \brief The fixed underlying type of an enumeration. 4012 UPPC_FixedUnderlyingType, 4013 4014 /// \brief The enumerator value. 4015 UPPC_EnumeratorValue, 4016 4017 /// \brief A using declaration. 4018 UPPC_UsingDeclaration, 4019 4020 /// \brief A friend declaration. 4021 UPPC_FriendDeclaration, 4022 4023 /// \brief A declaration qualifier. 4024 UPPC_DeclarationQualifier, 4025 4026 /// \brief An initializer. 4027 UPPC_Initializer, 4028 4029 /// \brief A default argument. 4030 UPPC_DefaultArgument, 4031 4032 /// \brief The type of a non-type template parameter. 4033 UPPC_NonTypeTemplateParameterType, 4034 4035 /// \brief The type of an exception. 4036 UPPC_ExceptionType, 4037 4038 /// \brief Partial specialization. 4039 UPPC_PartialSpecialization 4040 }; 4041 4042 /// \brief If the given type contains an unexpanded parameter pack, 4043 /// diagnose the error. 4044 /// 4045 /// \param Loc The source location where a diagnostc should be emitted. 4046 /// 4047 /// \param T The type that is being checked for unexpanded parameter 4048 /// packs. 4049 /// 4050 /// \returns true if an error occurred, false otherwise. 4051 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, TypeSourceInfo *T, 4052 UnexpandedParameterPackContext UPPC); 4053 4054 /// \brief If the given expression contains an unexpanded parameter 4055 /// pack, diagnose the error. 4056 /// 4057 /// \param E The expression that is being checked for unexpanded 4058 /// parameter packs. 4059 /// 4060 /// \returns true if an error occurred, false otherwise. 4061 bool DiagnoseUnexpandedParameterPack(Expr *E, 4062 UnexpandedParameterPackContext UPPC = UPPC_Expression); 4063 4064 /// \brief If the given nested-name-specifier contains an unexpanded 4065 /// parameter pack, diagnose the error. 4066 /// 4067 /// \param SS The nested-name-specifier that is being checked for 4068 /// unexpanded parameter packs. 4069 /// 4070 /// \returns true if an error occurred, false otherwise. 4071 bool DiagnoseUnexpandedParameterPack(const CXXScopeSpec &SS, 4072 UnexpandedParameterPackContext UPPC); 4073 4074 /// \brief If the given name contains an unexpanded parameter pack, 4075 /// diagnose the error. 4076 /// 4077 /// \param NameInfo The name (with source location information) that 4078 /// is being checked for unexpanded parameter packs. 4079 /// 4080 /// \returns true if an error occurred, false otherwise. 4081 bool DiagnoseUnexpandedParameterPack(const DeclarationNameInfo &NameInfo, 4082 UnexpandedParameterPackContext UPPC); 4083 4084 /// \brief If the given template name contains an unexpanded parameter pack, 4085 /// diagnose the error. 4086 /// 4087 /// \param Loc The location of the template name. 4088 /// 4089 /// \param Template The template name that is being checked for unexpanded 4090 /// parameter packs. 4091 /// 4092 /// \returns true if an error occurred, false otherwise. 4093 bool DiagnoseUnexpandedParameterPack(SourceLocation Loc, 4094 TemplateName Template, 4095 UnexpandedParameterPackContext UPPC); 4096 4097 /// \brief If the given template argument contains an unexpanded parameter 4098 /// pack, diagnose the error. 4099 /// 4100 /// \param Arg The template argument that is being checked for unexpanded 4101 /// parameter packs. 4102 /// 4103 /// \returns true if an error occurred, false otherwise. 4104 bool DiagnoseUnexpandedParameterPack(TemplateArgumentLoc Arg, 4105 UnexpandedParameterPackContext UPPC); 4106 4107 /// \brief Collect the set of unexpanded parameter packs within the given 4108 /// template argument. 4109 /// 4110 /// \param Arg The template argument that will be traversed to find 4111 /// unexpanded parameter packs. 4112 void collectUnexpandedParameterPacks(TemplateArgument Arg, 4113 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4114 4115 /// \brief Collect the set of unexpanded parameter packs within the given 4116 /// template argument. 4117 /// 4118 /// \param Arg The template argument that will be traversed to find 4119 /// unexpanded parameter packs. 4120 void collectUnexpandedParameterPacks(TemplateArgumentLoc Arg, 4121 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4122 4123 /// \brief Collect the set of unexpanded parameter packs within the given 4124 /// type. 4125 /// 4126 /// \param T The type that will be traversed to find 4127 /// unexpanded parameter packs. 4128 void collectUnexpandedParameterPacks(QualType T, 4129 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4130 4131 /// \brief Collect the set of unexpanded parameter packs within the given 4132 /// type. 4133 /// 4134 /// \param TL The type that will be traversed to find 4135 /// unexpanded parameter packs. 4136 void collectUnexpandedParameterPacks(TypeLoc TL, 4137 SmallVectorImpl<UnexpandedParameterPack> &Unexpanded); 4138 4139 /// \brief Invoked when parsing a template argument followed by an 4140 /// ellipsis, which creates a pack expansion. 4141 /// 4142 /// \param Arg The template argument preceding the ellipsis, which 4143 /// may already be invalid. 4144 /// 4145 /// \param EllipsisLoc The location of the ellipsis. 4146 ParsedTemplateArgument ActOnPackExpansion(const ParsedTemplateArgument &Arg, 4147 SourceLocation EllipsisLoc); 4148 4149 /// \brief Invoked when parsing a type followed by an ellipsis, which 4150 /// creates a pack expansion. 4151 /// 4152 /// \param Type The type preceding the ellipsis, which will become 4153 /// the pattern of the pack expansion. 4154 /// 4155 /// \param EllipsisLoc The location of the ellipsis. 4156 TypeResult ActOnPackExpansion(ParsedType Type, SourceLocation EllipsisLoc); 4157 4158 /// \brief Construct a pack expansion type from the pattern of the pack 4159 /// expansion. 4160 TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern, 4161 SourceLocation EllipsisLoc, 4162 llvm::Optional<unsigned> NumExpansions); 4163 4164 /// \brief Construct a pack expansion type from the pattern of the pack 4165 /// expansion. 4166 QualType CheckPackExpansion(QualType Pattern, 4167 SourceRange PatternRange, 4168 SourceLocation EllipsisLoc, 4169 llvm::Optional<unsigned> NumExpansions); 4170 4171 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4172 /// creates a pack expansion. 4173 /// 4174 /// \param Pattern The expression preceding the ellipsis, which will become 4175 /// the pattern of the pack expansion. 4176 /// 4177 /// \param EllipsisLoc The location of the ellipsis. 4178 ExprResult ActOnPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc); 4179 4180 /// \brief Invoked when parsing an expression followed by an ellipsis, which 4181 /// creates a pack expansion. 4182 /// 4183 /// \param Pattern The expression preceding the ellipsis, which will become 4184 /// the pattern of the pack expansion. 4185 /// 4186 /// \param EllipsisLoc The location of the ellipsis. 4187 ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc, 4188 llvm::Optional<unsigned> NumExpansions); 4189 4190 /// \brief Determine whether we could expand a pack expansion with the 4191 /// given set of parameter packs into separate arguments by repeatedly 4192 /// transforming the pattern. 4193 /// 4194 /// \param EllipsisLoc The location of the ellipsis that identifies the 4195 /// pack expansion. 4196 /// 4197 /// \param PatternRange The source range that covers the entire pattern of 4198 /// the pack expansion. 4199 /// 4200 /// \param Unexpanded The set of unexpanded parameter packs within the 4201 /// pattern. 4202 /// 4203 /// \param NumUnexpanded The number of unexpanded parameter packs in 4204 /// \p Unexpanded. 4205 /// 4206 /// \param ShouldExpand Will be set to \c true if the transformer should 4207 /// expand the corresponding pack expansions into separate arguments. When 4208 /// set, \c NumExpansions must also be set. 4209 /// 4210 /// \param RetainExpansion Whether the caller should add an unexpanded 4211 /// pack expansion after all of the expanded arguments. This is used 4212 /// when extending explicitly-specified template argument packs per 4213 /// C++0x [temp.arg.explicit]p9. 4214 /// 4215 /// \param NumExpansions The number of separate arguments that will be in 4216 /// the expanded form of the corresponding pack expansion. This is both an 4217 /// input and an output parameter, which can be set by the caller if the 4218 /// number of expansions is known a priori (e.g., due to a prior substitution) 4219 /// and will be set by the callee when the number of expansions is known. 4220 /// The callee must set this value when \c ShouldExpand is \c true; it may 4221 /// set this value in other cases. 4222 /// 4223 /// \returns true if an error occurred (e.g., because the parameter packs 4224 /// are to be instantiated with arguments of different lengths), false 4225 /// otherwise. If false, \c ShouldExpand (and possibly \c NumExpansions) 4226 /// must be set. 4227 bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc, 4228 SourceRange PatternRange, 4229 const UnexpandedParameterPack *Unexpanded, 4230 unsigned NumUnexpanded, 4231 const MultiLevelTemplateArgumentList &TemplateArgs, 4232 bool &ShouldExpand, 4233 bool &RetainExpansion, 4234 llvm::Optional<unsigned> &NumExpansions); 4235 4236 /// \brief Determine the number of arguments in the given pack expansion 4237 /// type. 4238 /// 4239 /// This routine already assumes that the pack expansion type can be 4240 /// expanded and that the number of arguments in the expansion is 4241 /// consistent across all of the unexpanded parameter packs in its pattern. 4242 unsigned getNumArgumentsInExpansion(QualType T, 4243 const MultiLevelTemplateArgumentList &TemplateArgs); 4244 4245 /// \brief Determine whether the given declarator contains any unexpanded 4246 /// parameter packs. 4247 /// 4248 /// This routine is used by the parser to disambiguate function declarators 4249 /// with an ellipsis prior to the ')', e.g., 4250 /// 4251 /// \code 4252 /// void f(T...); 4253 /// \endcode 4254 /// 4255 /// To determine whether we have an (unnamed) function parameter pack or 4256 /// a variadic function. 4257 /// 4258 /// \returns true if the declarator contains any unexpanded parameter packs, 4259 /// false otherwise. 4260 bool containsUnexpandedParameterPacks(Declarator &D); 4261 4262 //===--------------------------------------------------------------------===// 4263 // C++ Template Argument Deduction (C++ [temp.deduct]) 4264 //===--------------------------------------------------------------------===// 4265 4266 /// \brief Describes the result of template argument deduction. 4267 /// 4268 /// The TemplateDeductionResult enumeration describes the result of 4269 /// template argument deduction, as returned from 4270 /// DeduceTemplateArguments(). The separate TemplateDeductionInfo 4271 /// structure provides additional information about the results of 4272 /// template argument deduction, e.g., the deduced template argument 4273 /// list (if successful) or the specific template parameters or 4274 /// deduced arguments that were involved in the failure. 4275 enum TemplateDeductionResult { 4276 /// \brief Template argument deduction was successful. 4277 TDK_Success = 0, 4278 /// \brief Template argument deduction exceeded the maximum template 4279 /// instantiation depth (which has already been diagnosed). 4280 TDK_InstantiationDepth, 4281 /// \brief Template argument deduction did not deduce a value 4282 /// for every template parameter. 4283 TDK_Incomplete, 4284 /// \brief Template argument deduction produced inconsistent 4285 /// deduced values for the given template parameter. 4286 TDK_Inconsistent, 4287 /// \brief Template argument deduction failed due to inconsistent 4288 /// cv-qualifiers on a template parameter type that would 4289 /// otherwise be deduced, e.g., we tried to deduce T in "const T" 4290 /// but were given a non-const "X". 4291 TDK_Underqualified, 4292 /// \brief Substitution of the deduced template argument values 4293 /// resulted in an error. 4294 TDK_SubstitutionFailure, 4295 /// \brief Substitution of the deduced template argument values 4296 /// into a non-deduced context produced a type or value that 4297 /// produces a type that does not match the original template 4298 /// arguments provided. 4299 TDK_NonDeducedMismatch, 4300 /// \brief When performing template argument deduction for a function 4301 /// template, there were too many call arguments. 4302 TDK_TooManyArguments, 4303 /// \brief When performing template argument deduction for a function 4304 /// template, there were too few call arguments. 4305 TDK_TooFewArguments, 4306 /// \brief The explicitly-specified template arguments were not valid 4307 /// template arguments for the given template. 4308 TDK_InvalidExplicitArguments, 4309 /// \brief The arguments included an overloaded function name that could 4310 /// not be resolved to a suitable function. 4311 TDK_FailedOverloadResolution 4312 }; 4313 4314 TemplateDeductionResult 4315 DeduceTemplateArguments(ClassTemplatePartialSpecializationDecl *Partial, 4316 const TemplateArgumentList &TemplateArgs, 4317 sema::TemplateDeductionInfo &Info); 4318 4319 TemplateDeductionResult 4320 SubstituteExplicitTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4321 TemplateArgumentListInfo &ExplicitTemplateArgs, 4322 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4323 SmallVectorImpl<QualType> &ParamTypes, 4324 QualType *FunctionType, 4325 sema::TemplateDeductionInfo &Info); 4326 4327 /// brief A function argument from which we performed template argument 4328 // deduction for a call. 4329 struct OriginalCallArg { 4330 OriginalCallArg(QualType OriginalParamType, 4331 unsigned ArgIdx, 4332 QualType OriginalArgType) 4333 : OriginalParamType(OriginalParamType), ArgIdx(ArgIdx), 4334 OriginalArgType(OriginalArgType) { } 4335 4336 QualType OriginalParamType; 4337 unsigned ArgIdx; 4338 QualType OriginalArgType; 4339 }; 4340 4341 TemplateDeductionResult 4342 FinishTemplateArgumentDeduction(FunctionTemplateDecl *FunctionTemplate, 4343 SmallVectorImpl<DeducedTemplateArgument> &Deduced, 4344 unsigned NumExplicitlySpecified, 4345 FunctionDecl *&Specialization, 4346 sema::TemplateDeductionInfo &Info, 4347 SmallVectorImpl<OriginalCallArg> const *OriginalCallArgs = 0); 4348 4349 TemplateDeductionResult 4350 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4351 TemplateArgumentListInfo *ExplicitTemplateArgs, 4352 Expr **Args, unsigned NumArgs, 4353 FunctionDecl *&Specialization, 4354 sema::TemplateDeductionInfo &Info); 4355 4356 TemplateDeductionResult 4357 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4358 TemplateArgumentListInfo *ExplicitTemplateArgs, 4359 QualType ArgFunctionType, 4360 FunctionDecl *&Specialization, 4361 sema::TemplateDeductionInfo &Info); 4362 4363 TemplateDeductionResult 4364 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4365 QualType ToType, 4366 CXXConversionDecl *&Specialization, 4367 sema::TemplateDeductionInfo &Info); 4368 4369 TemplateDeductionResult 4370 DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate, 4371 TemplateArgumentListInfo *ExplicitTemplateArgs, 4372 FunctionDecl *&Specialization, 4373 sema::TemplateDeductionInfo &Info); 4374 4375 bool DeduceAutoType(TypeSourceInfo *AutoType, Expr *Initializer, 4376 TypeSourceInfo *&Result); 4377 4378 FunctionTemplateDecl *getMoreSpecializedTemplate(FunctionTemplateDecl *FT1, 4379 FunctionTemplateDecl *FT2, 4380 SourceLocation Loc, 4381 TemplatePartialOrderingContext TPOC, 4382 unsigned NumCallArguments); 4383 UnresolvedSetIterator getMostSpecialized(UnresolvedSetIterator SBegin, 4384 UnresolvedSetIterator SEnd, 4385 TemplatePartialOrderingContext TPOC, 4386 unsigned NumCallArguments, 4387 SourceLocation Loc, 4388 const PartialDiagnostic &NoneDiag, 4389 const PartialDiagnostic &AmbigDiag, 4390 const PartialDiagnostic &CandidateDiag, 4391 bool Complain = true); 4392 4393 ClassTemplatePartialSpecializationDecl * 4394 getMoreSpecializedPartialSpecialization( 4395 ClassTemplatePartialSpecializationDecl *PS1, 4396 ClassTemplatePartialSpecializationDecl *PS2, 4397 SourceLocation Loc); 4398 4399 void MarkUsedTemplateParameters(const TemplateArgumentList &TemplateArgs, 4400 bool OnlyDeduced, 4401 unsigned Depth, 4402 SmallVectorImpl<bool> &Used); 4403 void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate, 4404 SmallVectorImpl<bool> &Deduced); 4405 4406 //===--------------------------------------------------------------------===// 4407 // C++ Template Instantiation 4408 // 4409 4410 MultiLevelTemplateArgumentList getTemplateInstantiationArgs(NamedDecl *D, 4411 const TemplateArgumentList *Innermost = 0, 4412 bool RelativeToPrimary = false, 4413 const FunctionDecl *Pattern = 0); 4414 4415 /// \brief A template instantiation that is currently in progress. 4416 struct ActiveTemplateInstantiation { 4417 /// \brief The kind of template instantiation we are performing 4418 enum InstantiationKind { 4419 /// We are instantiating a template declaration. The entity is 4420 /// the declaration we're instantiating (e.g., a CXXRecordDecl). 4421 TemplateInstantiation, 4422 4423 /// We are instantiating a default argument for a template 4424 /// parameter. The Entity is the template, and 4425 /// TemplateArgs/NumTemplateArguments provides the template 4426 /// arguments as specified. 4427 /// FIXME: Use a TemplateArgumentList 4428 DefaultTemplateArgumentInstantiation, 4429 4430 /// We are instantiating a default argument for a function. 4431 /// The Entity is the ParmVarDecl, and TemplateArgs/NumTemplateArgs 4432 /// provides the template arguments as specified. 4433 DefaultFunctionArgumentInstantiation, 4434 4435 /// We are substituting explicit template arguments provided for 4436 /// a function template. The entity is a FunctionTemplateDecl. 4437 ExplicitTemplateArgumentSubstitution, 4438 4439 /// We are substituting template argument determined as part of 4440 /// template argument deduction for either a class template 4441 /// partial specialization or a function template. The 4442 /// Entity is either a ClassTemplatePartialSpecializationDecl or 4443 /// a FunctionTemplateDecl. 4444 DeducedTemplateArgumentSubstitution, 4445 4446 /// We are substituting prior template arguments into a new 4447 /// template parameter. The template parameter itself is either a 4448 /// NonTypeTemplateParmDecl or a TemplateTemplateParmDecl. 4449 PriorTemplateArgumentSubstitution, 4450 4451 /// We are checking the validity of a default template argument that 4452 /// has been used when naming a template-id. 4453 DefaultTemplateArgumentChecking 4454 } Kind; 4455 4456 /// \brief The point of instantiation within the source code. 4457 SourceLocation PointOfInstantiation; 4458 4459 /// \brief The template (or partial specialization) in which we are 4460 /// performing the instantiation, for substitutions of prior template 4461 /// arguments. 4462 NamedDecl *Template; 4463 4464 /// \brief The entity that is being instantiated. 4465 uintptr_t Entity; 4466 4467 /// \brief The list of template arguments we are substituting, if they 4468 /// are not part of the entity. 4469 const TemplateArgument *TemplateArgs; 4470 4471 /// \brief The number of template arguments in TemplateArgs. 4472 unsigned NumTemplateArgs; 4473 4474 /// \brief The template deduction info object associated with the 4475 /// substitution or checking of explicit or deduced template arguments. 4476 sema::TemplateDeductionInfo *DeductionInfo; 4477 4478 /// \brief The source range that covers the construct that cause 4479 /// the instantiation, e.g., the template-id that causes a class 4480 /// template instantiation. 4481 SourceRange InstantiationRange; 4482 4483 ActiveTemplateInstantiation() 4484 : Kind(TemplateInstantiation), Template(0), Entity(0), TemplateArgs(0), 4485 NumTemplateArgs(0), DeductionInfo(0) {} 4486 4487 /// \brief Determines whether this template is an actual instantiation 4488 /// that should be counted toward the maximum instantiation depth. 4489 bool isInstantiationRecord() const; 4490 4491 friend bool operator==(const ActiveTemplateInstantiation &X, 4492 const ActiveTemplateInstantiation &Y) { 4493 if (X.Kind != Y.Kind) 4494 return false; 4495 4496 if (X.Entity != Y.Entity) 4497 return false; 4498 4499 switch (X.Kind) { 4500 case TemplateInstantiation: 4501 return true; 4502 4503 case PriorTemplateArgumentSubstitution: 4504 case DefaultTemplateArgumentChecking: 4505 if (X.Template != Y.Template) 4506 return false; 4507 4508 // Fall through 4509 4510 case DefaultTemplateArgumentInstantiation: 4511 case ExplicitTemplateArgumentSubstitution: 4512 case DeducedTemplateArgumentSubstitution: 4513 case DefaultFunctionArgumentInstantiation: 4514 return X.TemplateArgs == Y.TemplateArgs; 4515 4516 } 4517 4518 return true; 4519 } 4520 4521 friend bool operator!=(const ActiveTemplateInstantiation &X, 4522 const ActiveTemplateInstantiation &Y) { 4523 return !(X == Y); 4524 } 4525 }; 4526 4527 /// \brief List of active template instantiations. 4528 /// 4529 /// This vector is treated as a stack. As one template instantiation 4530 /// requires another template instantiation, additional 4531 /// instantiations are pushed onto the stack up to a 4532 /// user-configurable limit LangOptions::InstantiationDepth. 4533 SmallVector<ActiveTemplateInstantiation, 16> 4534 ActiveTemplateInstantiations; 4535 4536 /// \brief Whether we are in a SFINAE context that is not associated with 4537 /// template instantiation. 4538 /// 4539 /// This is used when setting up a SFINAE trap (\c see SFINAETrap) outside 4540 /// of a template instantiation or template argument deduction. 4541 bool InNonInstantiationSFINAEContext; 4542 4543 /// \brief The number of ActiveTemplateInstantiation entries in 4544 /// \c ActiveTemplateInstantiations that are not actual instantiations and, 4545 /// therefore, should not be counted as part of the instantiation depth. 4546 unsigned NonInstantiationEntries; 4547 4548 /// \brief The last template from which a template instantiation 4549 /// error or warning was produced. 4550 /// 4551 /// This value is used to suppress printing of redundant template 4552 /// instantiation backtraces when there are multiple errors in the 4553 /// same instantiation. FIXME: Does this belong in Sema? It's tough 4554 /// to implement it anywhere else. 4555 ActiveTemplateInstantiation LastTemplateInstantiationErrorContext; 4556 4557 /// \brief The current index into pack expansion arguments that will be 4558 /// used for substitution of parameter packs. 4559 /// 4560 /// The pack expansion index will be -1 to indicate that parameter packs 4561 /// should be instantiated as themselves. Otherwise, the index specifies 4562 /// which argument within the parameter pack will be used for substitution. 4563 int ArgumentPackSubstitutionIndex; 4564 4565 /// \brief RAII object used to change the argument pack substitution index 4566 /// within a \c Sema object. 4567 /// 4568 /// See \c ArgumentPackSubstitutionIndex for more information. 4569 class ArgumentPackSubstitutionIndexRAII { 4570 Sema &Self; 4571 int OldSubstitutionIndex; 4572 4573 public: 4574 ArgumentPackSubstitutionIndexRAII(Sema &Self, int NewSubstitutionIndex) 4575 : Self(Self), OldSubstitutionIndex(Self.ArgumentPackSubstitutionIndex) { 4576 Self.ArgumentPackSubstitutionIndex = NewSubstitutionIndex; 4577 } 4578 4579 ~ArgumentPackSubstitutionIndexRAII() { 4580 Self.ArgumentPackSubstitutionIndex = OldSubstitutionIndex; 4581 } 4582 }; 4583 4584 friend class ArgumentPackSubstitutionRAII; 4585 4586 /// \brief The stack of calls expression undergoing template instantiation. 4587 /// 4588 /// The top of this stack is used by a fixit instantiating unresolved 4589 /// function calls to fix the AST to match the textual change it prints. 4590 SmallVector<CallExpr *, 8> CallsUndergoingInstantiation; 4591 4592 /// \brief For each declaration that involved template argument deduction, the 4593 /// set of diagnostics that were suppressed during that template argument 4594 /// deduction. 4595 /// 4596 /// FIXME: Serialize this structure to the AST file. 4597 llvm::DenseMap<Decl *, SmallVector<PartialDiagnosticAt, 1> > 4598 SuppressedDiagnostics; 4599 4600 /// \brief A stack object to be created when performing template 4601 /// instantiation. 4602 /// 4603 /// Construction of an object of type \c InstantiatingTemplate 4604 /// pushes the current instantiation onto the stack of active 4605 /// instantiations. If the size of this stack exceeds the maximum 4606 /// number of recursive template instantiations, construction 4607 /// produces an error and evaluates true. 4608 /// 4609 /// Destruction of this object will pop the named instantiation off 4610 /// the stack. 4611 struct InstantiatingTemplate { 4612 /// \brief Note that we are instantiating a class template, 4613 /// function template, or a member thereof. 4614 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4615 Decl *Entity, 4616 SourceRange InstantiationRange = SourceRange()); 4617 4618 /// \brief Note that we are instantiating a default argument in a 4619 /// template-id. 4620 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4621 TemplateDecl *Template, 4622 const TemplateArgument *TemplateArgs, 4623 unsigned NumTemplateArgs, 4624 SourceRange InstantiationRange = SourceRange()); 4625 4626 /// \brief Note that we are instantiating a default argument in a 4627 /// template-id. 4628 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4629 FunctionTemplateDecl *FunctionTemplate, 4630 const TemplateArgument *TemplateArgs, 4631 unsigned NumTemplateArgs, 4632 ActiveTemplateInstantiation::InstantiationKind Kind, 4633 sema::TemplateDeductionInfo &DeductionInfo, 4634 SourceRange InstantiationRange = SourceRange()); 4635 4636 /// \brief Note that we are instantiating as part of template 4637 /// argument deduction for a class template partial 4638 /// specialization. 4639 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4640 ClassTemplatePartialSpecializationDecl *PartialSpec, 4641 const TemplateArgument *TemplateArgs, 4642 unsigned NumTemplateArgs, 4643 sema::TemplateDeductionInfo &DeductionInfo, 4644 SourceRange InstantiationRange = SourceRange()); 4645 4646 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4647 ParmVarDecl *Param, 4648 const TemplateArgument *TemplateArgs, 4649 unsigned NumTemplateArgs, 4650 SourceRange InstantiationRange = SourceRange()); 4651 4652 /// \brief Note that we are substituting prior template arguments into a 4653 /// non-type or template template parameter. 4654 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4655 NamedDecl *Template, 4656 NonTypeTemplateParmDecl *Param, 4657 const TemplateArgument *TemplateArgs, 4658 unsigned NumTemplateArgs, 4659 SourceRange InstantiationRange); 4660 4661 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4662 NamedDecl *Template, 4663 TemplateTemplateParmDecl *Param, 4664 const TemplateArgument *TemplateArgs, 4665 unsigned NumTemplateArgs, 4666 SourceRange InstantiationRange); 4667 4668 /// \brief Note that we are checking the default template argument 4669 /// against the template parameter for a given template-id. 4670 InstantiatingTemplate(Sema &SemaRef, SourceLocation PointOfInstantiation, 4671 TemplateDecl *Template, 4672 NamedDecl *Param, 4673 const TemplateArgument *TemplateArgs, 4674 unsigned NumTemplateArgs, 4675 SourceRange InstantiationRange); 4676 4677 4678 /// \brief Note that we have finished instantiating this template. 4679 void Clear(); 4680 4681 ~InstantiatingTemplate() { Clear(); } 4682 4683 /// \brief Determines whether we have exceeded the maximum 4684 /// recursive template instantiations. 4685 operator bool() const { return Invalid; } 4686 4687 private: 4688 Sema &SemaRef; 4689 bool Invalid; 4690 bool SavedInNonInstantiationSFINAEContext; 4691 bool CheckInstantiationDepth(SourceLocation PointOfInstantiation, 4692 SourceRange InstantiationRange); 4693 4694 InstantiatingTemplate(const InstantiatingTemplate&); // not implemented 4695 4696 InstantiatingTemplate& 4697 operator=(const InstantiatingTemplate&); // not implemented 4698 }; 4699 4700 void PrintInstantiationStack(); 4701 4702 /// \brief Determines whether we are currently in a context where 4703 /// template argument substitution failures are not considered 4704 /// errors. 4705 /// 4706 /// \returns An empty \c llvm::Optional if we're not in a SFINAE context. 4707 /// Otherwise, contains a pointer that, if non-NULL, contains the nearest 4708 /// template-deduction context object, which can be used to capture 4709 /// diagnostics that will be suppressed. 4710 llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const; 4711 4712 /// \brief RAII class used to determine whether SFINAE has 4713 /// trapped any errors that occur during template argument 4714 /// deduction.` 4715 class SFINAETrap { 4716 Sema &SemaRef; 4717 unsigned PrevSFINAEErrors; 4718 bool PrevInNonInstantiationSFINAEContext; 4719 bool PrevAccessCheckingSFINAE; 4720 4721 public: 4722 explicit SFINAETrap(Sema &SemaRef, bool AccessCheckingSFINAE = false) 4723 : SemaRef(SemaRef), PrevSFINAEErrors(SemaRef.NumSFINAEErrors), 4724 PrevInNonInstantiationSFINAEContext( 4725 SemaRef.InNonInstantiationSFINAEContext), 4726 PrevAccessCheckingSFINAE(SemaRef.AccessCheckingSFINAE) 4727 { 4728 if (!SemaRef.isSFINAEContext()) 4729 SemaRef.InNonInstantiationSFINAEContext = true; 4730 SemaRef.AccessCheckingSFINAE = AccessCheckingSFINAE; 4731 } 4732 4733 ~SFINAETrap() { 4734 SemaRef.NumSFINAEErrors = PrevSFINAEErrors; 4735 SemaRef.InNonInstantiationSFINAEContext 4736 = PrevInNonInstantiationSFINAEContext; 4737 SemaRef.AccessCheckingSFINAE = PrevAccessCheckingSFINAE; 4738 } 4739 4740 /// \brief Determine whether any SFINAE errors have been trapped. 4741 bool hasErrorOccurred() const { 4742 return SemaRef.NumSFINAEErrors > PrevSFINAEErrors; 4743 } 4744 }; 4745 4746 /// \brief The current instantiation scope used to store local 4747 /// variables. 4748 LocalInstantiationScope *CurrentInstantiationScope; 4749 4750 /// \brief The number of typos corrected by CorrectTypo. 4751 unsigned TyposCorrected; 4752 4753 typedef llvm::DenseMap<IdentifierInfo *, TypoCorrection> 4754 UnqualifiedTyposCorrectedMap; 4755 4756 /// \brief A cache containing the results of typo correction for unqualified 4757 /// name lookup. 4758 /// 4759 /// The string is the string that we corrected to (which may be empty, if 4760 /// there was no correction), while the boolean will be true when the 4761 /// string represents a keyword. 4762 UnqualifiedTyposCorrectedMap UnqualifiedTyposCorrected; 4763 4764 /// \brief Worker object for performing CFG-based warnings. 4765 sema::AnalysisBasedWarnings AnalysisWarnings; 4766 4767 /// \brief An entity for which implicit template instantiation is required. 4768 /// 4769 /// The source location associated with the declaration is the first place in 4770 /// the source code where the declaration was "used". It is not necessarily 4771 /// the point of instantiation (which will be either before or after the 4772 /// namespace-scope declaration that triggered this implicit instantiation), 4773 /// However, it is the location that diagnostics should generally refer to, 4774 /// because users will need to know what code triggered the instantiation. 4775 typedef std::pair<ValueDecl *, SourceLocation> PendingImplicitInstantiation; 4776 4777 /// \brief The queue of implicit template instantiations that are required 4778 /// but have not yet been performed. 4779 std::deque<PendingImplicitInstantiation> PendingInstantiations; 4780 4781 /// \brief The queue of implicit template instantiations that are required 4782 /// and must be performed within the current local scope. 4783 /// 4784 /// This queue is only used for member functions of local classes in 4785 /// templates, which must be instantiated in the same scope as their 4786 /// enclosing function, so that they can reference function-local 4787 /// types, static variables, enumerators, etc. 4788 std::deque<PendingImplicitInstantiation> PendingLocalImplicitInstantiations; 4789 4790 void PerformPendingInstantiations(bool LocalOnly = false); 4791 4792 TypeSourceInfo *SubstType(TypeSourceInfo *T, 4793 const MultiLevelTemplateArgumentList &TemplateArgs, 4794 SourceLocation Loc, DeclarationName Entity); 4795 4796 QualType SubstType(QualType T, 4797 const MultiLevelTemplateArgumentList &TemplateArgs, 4798 SourceLocation Loc, DeclarationName Entity); 4799 4800 TypeSourceInfo *SubstType(TypeLoc TL, 4801 const MultiLevelTemplateArgumentList &TemplateArgs, 4802 SourceLocation Loc, DeclarationName Entity); 4803 4804 TypeSourceInfo *SubstFunctionDeclType(TypeSourceInfo *T, 4805 const MultiLevelTemplateArgumentList &TemplateArgs, 4806 SourceLocation Loc, 4807 DeclarationName Entity); 4808 ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D, 4809 const MultiLevelTemplateArgumentList &TemplateArgs, 4810 int indexAdjustment, 4811 llvm::Optional<unsigned> NumExpansions); 4812 bool SubstParmTypes(SourceLocation Loc, 4813 ParmVarDecl **Params, unsigned NumParams, 4814 const MultiLevelTemplateArgumentList &TemplateArgs, 4815 SmallVectorImpl<QualType> &ParamTypes, 4816 SmallVectorImpl<ParmVarDecl *> *OutParams = 0); 4817 ExprResult SubstExpr(Expr *E, 4818 const MultiLevelTemplateArgumentList &TemplateArgs); 4819 4820 /// \brief Substitute the given template arguments into a list of 4821 /// expressions, expanding pack expansions if required. 4822 /// 4823 /// \param Exprs The list of expressions to substitute into. 4824 /// 4825 /// \param NumExprs The number of expressions in \p Exprs. 4826 /// 4827 /// \param IsCall Whether this is some form of call, in which case 4828 /// default arguments will be dropped. 4829 /// 4830 /// \param TemplateArgs The set of template arguments to substitute. 4831 /// 4832 /// \param Outputs Will receive all of the substituted arguments. 4833 /// 4834 /// \returns true if an error occurred, false otherwise. 4835 bool SubstExprs(Expr **Exprs, unsigned NumExprs, bool IsCall, 4836 const MultiLevelTemplateArgumentList &TemplateArgs, 4837 SmallVectorImpl<Expr *> &Outputs); 4838 4839 StmtResult SubstStmt(Stmt *S, 4840 const MultiLevelTemplateArgumentList &TemplateArgs); 4841 4842 Decl *SubstDecl(Decl *D, DeclContext *Owner, 4843 const MultiLevelTemplateArgumentList &TemplateArgs); 4844 4845 bool 4846 SubstBaseSpecifiers(CXXRecordDecl *Instantiation, 4847 CXXRecordDecl *Pattern, 4848 const MultiLevelTemplateArgumentList &TemplateArgs); 4849 4850 bool 4851 InstantiateClass(SourceLocation PointOfInstantiation, 4852 CXXRecordDecl *Instantiation, CXXRecordDecl *Pattern, 4853 const MultiLevelTemplateArgumentList &TemplateArgs, 4854 TemplateSpecializationKind TSK, 4855 bool Complain = true); 4856 4857 void InstantiateAttrs(const MultiLevelTemplateArgumentList &TemplateArgs, 4858 const Decl *Pattern, Decl *Inst); 4859 4860 bool 4861 InstantiateClassTemplateSpecialization(SourceLocation PointOfInstantiation, 4862 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4863 TemplateSpecializationKind TSK, 4864 bool Complain = true); 4865 4866 void InstantiateClassMembers(SourceLocation PointOfInstantiation, 4867 CXXRecordDecl *Instantiation, 4868 const MultiLevelTemplateArgumentList &TemplateArgs, 4869 TemplateSpecializationKind TSK); 4870 4871 void InstantiateClassTemplateSpecializationMembers( 4872 SourceLocation PointOfInstantiation, 4873 ClassTemplateSpecializationDecl *ClassTemplateSpec, 4874 TemplateSpecializationKind TSK); 4875 4876 NestedNameSpecifierLoc 4877 SubstNestedNameSpecifierLoc(NestedNameSpecifierLoc NNS, 4878 const MultiLevelTemplateArgumentList &TemplateArgs); 4879 4880 DeclarationNameInfo 4881 SubstDeclarationNameInfo(const DeclarationNameInfo &NameInfo, 4882 const MultiLevelTemplateArgumentList &TemplateArgs); 4883 TemplateName 4884 SubstTemplateName(NestedNameSpecifierLoc QualifierLoc, TemplateName Name, 4885 SourceLocation Loc, 4886 const MultiLevelTemplateArgumentList &TemplateArgs); 4887 bool Subst(const TemplateArgumentLoc *Args, unsigned NumArgs, 4888 TemplateArgumentListInfo &Result, 4889 const MultiLevelTemplateArgumentList &TemplateArgs); 4890 4891 void InstantiateFunctionDefinition(SourceLocation PointOfInstantiation, 4892 FunctionDecl *Function, 4893 bool Recursive = false, 4894 bool DefinitionRequired = false); 4895 void InstantiateStaticDataMemberDefinition( 4896 SourceLocation PointOfInstantiation, 4897 VarDecl *Var, 4898 bool Recursive = false, 4899 bool DefinitionRequired = false); 4900 4901 void InstantiateMemInitializers(CXXConstructorDecl *New, 4902 const CXXConstructorDecl *Tmpl, 4903 const MultiLevelTemplateArgumentList &TemplateArgs); 4904 bool InstantiateInitializer(Expr *Init, 4905 const MultiLevelTemplateArgumentList &TemplateArgs, 4906 SourceLocation &LParenLoc, 4907 ASTOwningVector<Expr*> &NewArgs, 4908 SourceLocation &RParenLoc); 4909 4910 NamedDecl *FindInstantiatedDecl(SourceLocation Loc, NamedDecl *D, 4911 const MultiLevelTemplateArgumentList &TemplateArgs); 4912 DeclContext *FindInstantiatedContext(SourceLocation Loc, DeclContext *DC, 4913 const MultiLevelTemplateArgumentList &TemplateArgs); 4914 4915 // Objective-C declarations. 4916 Decl *ActOnStartClassInterface(SourceLocation AtInterfaceLoc, 4917 IdentifierInfo *ClassName, 4918 SourceLocation ClassLoc, 4919 IdentifierInfo *SuperName, 4920 SourceLocation SuperLoc, 4921 Decl * const *ProtoRefs, 4922 unsigned NumProtoRefs, 4923 const SourceLocation *ProtoLocs, 4924 SourceLocation EndProtoLoc, 4925 AttributeList *AttrList); 4926 4927 Decl *ActOnCompatiblityAlias( 4928 SourceLocation AtCompatibilityAliasLoc, 4929 IdentifierInfo *AliasName, SourceLocation AliasLocation, 4930 IdentifierInfo *ClassName, SourceLocation ClassLocation); 4931 4932 bool CheckForwardProtocolDeclarationForCircularDependency( 4933 IdentifierInfo *PName, 4934 SourceLocation &PLoc, SourceLocation PrevLoc, 4935 const ObjCList<ObjCProtocolDecl> &PList); 4936 4937 Decl *ActOnStartProtocolInterface( 4938 SourceLocation AtProtoInterfaceLoc, 4939 IdentifierInfo *ProtocolName, SourceLocation ProtocolLoc, 4940 Decl * const *ProtoRefNames, unsigned NumProtoRefs, 4941 const SourceLocation *ProtoLocs, 4942 SourceLocation EndProtoLoc, 4943 AttributeList *AttrList); 4944 4945 Decl *ActOnStartCategoryInterface(SourceLocation AtInterfaceLoc, 4946 IdentifierInfo *ClassName, 4947 SourceLocation ClassLoc, 4948 IdentifierInfo *CategoryName, 4949 SourceLocation CategoryLoc, 4950 Decl * const *ProtoRefs, 4951 unsigned NumProtoRefs, 4952 const SourceLocation *ProtoLocs, 4953 SourceLocation EndProtoLoc); 4954 4955 Decl *ActOnStartClassImplementation( 4956 SourceLocation AtClassImplLoc, 4957 IdentifierInfo *ClassName, SourceLocation ClassLoc, 4958 IdentifierInfo *SuperClassname, 4959 SourceLocation SuperClassLoc); 4960 4961 Decl *ActOnStartCategoryImplementation(SourceLocation AtCatImplLoc, 4962 IdentifierInfo *ClassName, 4963 SourceLocation ClassLoc, 4964 IdentifierInfo *CatName, 4965 SourceLocation CatLoc); 4966 4967 Decl *ActOnForwardClassDeclaration(SourceLocation Loc, 4968 IdentifierInfo **IdentList, 4969 SourceLocation *IdentLocs, 4970 unsigned NumElts); 4971 4972 Decl *ActOnForwardProtocolDeclaration(SourceLocation AtProtoclLoc, 4973 const IdentifierLocPair *IdentList, 4974 unsigned NumElts, 4975 AttributeList *attrList); 4976 4977 void FindProtocolDeclaration(bool WarnOnDeclarations, 4978 const IdentifierLocPair *ProtocolId, 4979 unsigned NumProtocols, 4980 SmallVectorImpl<Decl *> &Protocols); 4981 4982 /// Ensure attributes are consistent with type. 4983 /// \param [in, out] Attributes The attributes to check; they will 4984 /// be modified to be consistent with \arg PropertyTy. 4985 void CheckObjCPropertyAttributes(Decl *PropertyPtrTy, 4986 SourceLocation Loc, 4987 unsigned &Attributes); 4988 4989 /// Process the specified property declaration and create decls for the 4990 /// setters and getters as needed. 4991 /// \param property The property declaration being processed 4992 /// \param DC The semantic container for the property 4993 /// \param redeclaredProperty Declaration for property if redeclared 4994 /// in class extension. 4995 /// \param lexicalDC Container for redeclaredProperty. 4996 void ProcessPropertyDecl(ObjCPropertyDecl *property, 4997 ObjCContainerDecl *DC, 4998 ObjCPropertyDecl *redeclaredProperty = 0, 4999 ObjCContainerDecl *lexicalDC = 0); 5000 5001 void DiagnosePropertyMismatch(ObjCPropertyDecl *Property, 5002 ObjCPropertyDecl *SuperProperty, 5003 const IdentifierInfo *Name); 5004 void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl); 5005 5006 void CompareMethodParamsInBaseAndSuper(Decl *IDecl, 5007 ObjCMethodDecl *MethodDecl, 5008 bool IsInstance); 5009 5010 void CompareProperties(Decl *CDecl, Decl *MergeProtocols); 5011 5012 void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT, 5013 ObjCInterfaceDecl *ID); 5014 5015 void MatchOneProtocolPropertiesInClass(Decl *CDecl, 5016 ObjCProtocolDecl *PDecl); 5017 5018 void ActOnAtEnd(Scope *S, SourceRange AtEnd, Decl *classDecl, 5019 Decl **allMethods = 0, unsigned allNum = 0, 5020 Decl **allProperties = 0, unsigned pNum = 0, 5021 DeclGroupPtrTy *allTUVars = 0, unsigned tuvNum = 0); 5022 5023 Decl *ActOnProperty(Scope *S, SourceLocation AtLoc, 5024 FieldDeclarator &FD, ObjCDeclSpec &ODS, 5025 Selector GetterSel, Selector SetterSel, 5026 Decl *ClassCategory, 5027 bool *OverridingProperty, 5028 tok::ObjCKeywordKind MethodImplKind, 5029 DeclContext *lexicalDC = 0); 5030 5031 Decl *ActOnPropertyImplDecl(Scope *S, 5032 SourceLocation AtLoc, 5033 SourceLocation PropertyLoc, 5034 bool ImplKind,Decl *ClassImplDecl, 5035 IdentifierInfo *PropertyId, 5036 IdentifierInfo *PropertyIvar, 5037 SourceLocation PropertyIvarLoc); 5038 5039 enum ObjCSpecialMethodKind { 5040 OSMK_None, 5041 OSMK_Alloc, 5042 OSMK_New, 5043 OSMK_Copy, 5044 OSMK_RetainingInit, 5045 OSMK_NonRetainingInit 5046 }; 5047 5048 struct ObjCArgInfo { 5049 IdentifierInfo *Name; 5050 SourceLocation NameLoc; 5051 // The Type is null if no type was specified, and the DeclSpec is invalid 5052 // in this case. 5053 ParsedType Type; 5054 ObjCDeclSpec DeclSpec; 5055 5056 /// ArgAttrs - Attribute list for this argument. 5057 AttributeList *ArgAttrs; 5058 }; 5059 5060 Decl *ActOnMethodDeclaration( 5061 Scope *S, 5062 SourceLocation BeginLoc, // location of the + or -. 5063 SourceLocation EndLoc, // location of the ; or {. 5064 tok::TokenKind MethodType, 5065 Decl *ClassDecl, ObjCDeclSpec &ReturnQT, ParsedType ReturnType, 5066 SourceLocation SelectorStartLoc, Selector Sel, 5067 // optional arguments. The number of types/arguments is obtained 5068 // from the Sel.getNumArgs(). 5069 ObjCArgInfo *ArgInfo, 5070 DeclaratorChunk::ParamInfo *CParamInfo, unsigned CNumArgs, // c-style args 5071 AttributeList *AttrList, tok::ObjCKeywordKind MethodImplKind, 5072 bool isVariadic, bool MethodDefinition); 5073 5074 // Helper method for ActOnClassMethod/ActOnInstanceMethod. 5075 // Will search "local" class/category implementations for a method decl. 5076 // Will also search in class's root looking for instance method. 5077 // Returns 0 if no method is found. 5078 ObjCMethodDecl *LookupPrivateClassMethod(Selector Sel, 5079 ObjCInterfaceDecl *CDecl); 5080 ObjCMethodDecl *LookupPrivateInstanceMethod(Selector Sel, 5081 ObjCInterfaceDecl *ClassDecl); 5082 ObjCMethodDecl *LookupMethodInQualifiedType(Selector Sel, 5083 const ObjCObjectPointerType *OPT, 5084 bool IsInstance); 5085 5086 bool inferObjCARCLifetime(ValueDecl *decl); 5087 5088 ExprResult 5089 HandleExprPropertyRefExpr(const ObjCObjectPointerType *OPT, 5090 Expr *BaseExpr, 5091 SourceLocation OpLoc, 5092 DeclarationName MemberName, 5093 SourceLocation MemberLoc, 5094 SourceLocation SuperLoc, QualType SuperType, 5095 bool Super); 5096 5097 ExprResult 5098 ActOnClassPropertyRefExpr(IdentifierInfo &receiverName, 5099 IdentifierInfo &propertyName, 5100 SourceLocation receiverNameLoc, 5101 SourceLocation propertyNameLoc); 5102 5103 ObjCMethodDecl *tryCaptureObjCSelf(); 5104 5105 /// \brief Describes the kind of message expression indicated by a message 5106 /// send that starts with an identifier. 5107 enum ObjCMessageKind { 5108 /// \brief The message is sent to 'super'. 5109 ObjCSuperMessage, 5110 /// \brief The message is an instance message. 5111 ObjCInstanceMessage, 5112 /// \brief The message is a class message, and the identifier is a type 5113 /// name. 5114 ObjCClassMessage 5115 }; 5116 5117 ObjCMessageKind getObjCMessageKind(Scope *S, 5118 IdentifierInfo *Name, 5119 SourceLocation NameLoc, 5120 bool IsSuper, 5121 bool HasTrailingDot, 5122 ParsedType &ReceiverType); 5123 5124 ExprResult ActOnSuperMessage(Scope *S, SourceLocation SuperLoc, 5125 Selector Sel, 5126 SourceLocation LBracLoc, 5127 SourceLocation SelectorLoc, 5128 SourceLocation RBracLoc, 5129 MultiExprArg Args); 5130 5131 ExprResult BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo, 5132 QualType ReceiverType, 5133 SourceLocation SuperLoc, 5134 Selector Sel, 5135 ObjCMethodDecl *Method, 5136 SourceLocation LBracLoc, 5137 SourceLocation SelectorLoc, 5138 SourceLocation RBracLoc, 5139 MultiExprArg Args); 5140 5141 ExprResult ActOnClassMessage(Scope *S, 5142 ParsedType Receiver, 5143 Selector Sel, 5144 SourceLocation LBracLoc, 5145 SourceLocation SelectorLoc, 5146 SourceLocation RBracLoc, 5147 MultiExprArg Args); 5148 5149 ExprResult BuildInstanceMessage(Expr *Receiver, 5150 QualType ReceiverType, 5151 SourceLocation SuperLoc, 5152 Selector Sel, 5153 ObjCMethodDecl *Method, 5154 SourceLocation LBracLoc, 5155 SourceLocation SelectorLoc, 5156 SourceLocation RBracLoc, 5157 MultiExprArg Args); 5158 5159 ExprResult ActOnInstanceMessage(Scope *S, 5160 Expr *Receiver, 5161 Selector Sel, 5162 SourceLocation LBracLoc, 5163 SourceLocation SelectorLoc, 5164 SourceLocation RBracLoc, 5165 MultiExprArg Args); 5166 5167 ExprResult BuildObjCBridgedCast(SourceLocation LParenLoc, 5168 ObjCBridgeCastKind Kind, 5169 SourceLocation BridgeKeywordLoc, 5170 TypeSourceInfo *TSInfo, 5171 Expr *SubExpr); 5172 5173 ExprResult ActOnObjCBridgedCast(Scope *S, 5174 SourceLocation LParenLoc, 5175 ObjCBridgeCastKind Kind, 5176 SourceLocation BridgeKeywordLoc, 5177 ParsedType Type, 5178 SourceLocation RParenLoc, 5179 Expr *SubExpr); 5180 5181 bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall); 5182 5183 /// \brief Check whether the given new method is a valid override of the 5184 /// given overridden method, and set any properties that should be inherited. 5185 /// 5186 /// \returns True if an error occurred. 5187 bool CheckObjCMethodOverride(ObjCMethodDecl *NewMethod, 5188 const ObjCMethodDecl *Overridden, 5189 bool IsImplementation); 5190 5191 /// \brief Check whether the given method overrides any methods in its class, 5192 /// calling \c CheckObjCMethodOverride for each overridden method. 5193 bool CheckObjCMethodOverrides(ObjCMethodDecl *NewMethod, DeclContext *DC); 5194 5195 enum PragmaOptionsAlignKind { 5196 POAK_Native, // #pragma options align=native 5197 POAK_Natural, // #pragma options align=natural 5198 POAK_Packed, // #pragma options align=packed 5199 POAK_Power, // #pragma options align=power 5200 POAK_Mac68k, // #pragma options align=mac68k 5201 POAK_Reset // #pragma options align=reset 5202 }; 5203 5204 /// ActOnPragmaOptionsAlign - Called on well formed #pragma options align. 5205 void ActOnPragmaOptionsAlign(PragmaOptionsAlignKind Kind, 5206 SourceLocation PragmaLoc, 5207 SourceLocation KindLoc); 5208 5209 enum PragmaPackKind { 5210 PPK_Default, // #pragma pack([n]) 5211 PPK_Show, // #pragma pack(show), only supported by MSVC. 5212 PPK_Push, // #pragma pack(push, [identifier], [n]) 5213 PPK_Pop // #pragma pack(pop, [identifier], [n]) 5214 }; 5215 5216 enum PragmaMSStructKind { 5217 PMSST_OFF, // #pragms ms_struct off 5218 PMSST_ON // #pragms ms_struct on 5219 }; 5220 5221 /// ActOnPragmaPack - Called on well formed #pragma pack(...). 5222 void ActOnPragmaPack(PragmaPackKind Kind, 5223 IdentifierInfo *Name, 5224 Expr *Alignment, 5225 SourceLocation PragmaLoc, 5226 SourceLocation LParenLoc, 5227 SourceLocation RParenLoc); 5228 5229 /// ActOnPragmaMSStruct - Called on well formed #pragms ms_struct [on|off]. 5230 void ActOnPragmaMSStruct(PragmaMSStructKind Kind); 5231 5232 /// ActOnPragmaUnused - Called on well-formed '#pragma unused'. 5233 void ActOnPragmaUnused(const Token &Identifier, 5234 Scope *curScope, 5235 SourceLocation PragmaLoc); 5236 5237 /// ActOnPragmaVisibility - Called on well formed #pragma GCC visibility... . 5238 void ActOnPragmaVisibility(bool IsPush, const IdentifierInfo* VisType, 5239 SourceLocation PragmaLoc); 5240 5241 NamedDecl *DeclClonePragmaWeak(NamedDecl *ND, IdentifierInfo *II); 5242 void DeclApplyPragmaWeak(Scope *S, NamedDecl *ND, WeakInfo &W); 5243 5244 /// ActOnPragmaWeakID - Called on well formed #pragma weak ident. 5245 void ActOnPragmaWeakID(IdentifierInfo* WeakName, 5246 SourceLocation PragmaLoc, 5247 SourceLocation WeakNameLoc); 5248 5249 /// ActOnPragmaWeakAlias - Called on well formed #pragma weak ident = ident. 5250 void ActOnPragmaWeakAlias(IdentifierInfo* WeakName, 5251 IdentifierInfo* AliasName, 5252 SourceLocation PragmaLoc, 5253 SourceLocation WeakNameLoc, 5254 SourceLocation AliasNameLoc); 5255 5256 /// ActOnPragmaFPContract - Called on well formed 5257 /// #pragma {STDC,OPENCL} FP_CONTRACT 5258 void ActOnPragmaFPContract(tok::OnOffSwitch OOS); 5259 5260 /// AddAlignmentAttributesForRecord - Adds any needed alignment attributes to 5261 /// a the record decl, to handle '#pragma pack' and '#pragma options align'. 5262 void AddAlignmentAttributesForRecord(RecordDecl *RD); 5263 5264 /// AddMsStructLayoutForRecord - Adds ms_struct layout attribute to record. 5265 void AddMsStructLayoutForRecord(RecordDecl *RD); 5266 5267 /// FreePackedContext - Deallocate and null out PackContext. 5268 void FreePackedContext(); 5269 5270 /// PushNamespaceVisibilityAttr - Note that we've entered a 5271 /// namespace with a visibility attribute. 5272 void PushNamespaceVisibilityAttr(const VisibilityAttr *Attr); 5273 5274 /// AddPushedVisibilityAttribute - If '#pragma GCC visibility' was used, 5275 /// add an appropriate visibility attribute. 5276 void AddPushedVisibilityAttribute(Decl *RD); 5277 5278 /// PopPragmaVisibility - Pop the top element of the visibility stack; used 5279 /// for '#pragma GCC visibility' and visibility attributes on namespaces. 5280 void PopPragmaVisibility(); 5281 5282 /// FreeVisContext - Deallocate and null out VisContext. 5283 void FreeVisContext(); 5284 5285 /// AddAlignedAttr - Adds an aligned attribute to a particular declaration. 5286 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, Expr *E); 5287 void AddAlignedAttr(SourceLocation AttrLoc, Decl *D, TypeSourceInfo *T); 5288 5289 /// CastCategory - Get the correct forwarded implicit cast result category 5290 /// from the inner expression. 5291 ExprValueKind CastCategory(Expr *E); 5292 5293 /// \brief The kind of conversion being performed. 5294 enum CheckedConversionKind { 5295 /// \brief An implicit conversion. 5296 CCK_ImplicitConversion, 5297 /// \brief A C-style cast. 5298 CCK_CStyleCast, 5299 /// \brief A functional-style cast. 5300 CCK_FunctionalCast, 5301 /// \brief A cast other than a C-style cast. 5302 CCK_OtherCast 5303 }; 5304 5305 /// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit 5306 /// cast. If there is already an implicit cast, merge into the existing one. 5307 /// If isLvalue, the result of the cast is an lvalue. 5308 ExprResult ImpCastExprToType(Expr *E, QualType Type, CastKind CK, 5309 ExprValueKind VK = VK_RValue, 5310 const CXXCastPath *BasePath = 0, 5311 CheckedConversionKind CCK 5312 = CCK_ImplicitConversion); 5313 5314 /// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding 5315 /// to the conversion from scalar type ScalarTy to the Boolean type. 5316 static CastKind ScalarTypeToBooleanCastKind(QualType ScalarTy); 5317 5318 /// IgnoredValueConversions - Given that an expression's result is 5319 /// syntactically ignored, perform any conversions that are 5320 /// required. 5321 ExprResult IgnoredValueConversions(Expr *E); 5322 5323 // UsualUnaryConversions - promotes integers (C99 6.3.1.1p2) and converts 5324 // functions and arrays to their respective pointers (C99 6.3.2.1). 5325 ExprResult UsualUnaryConversions(Expr *E); 5326 5327 // DefaultFunctionArrayConversion - converts functions and arrays 5328 // to their respective pointers (C99 6.3.2.1). 5329 ExprResult DefaultFunctionArrayConversion(Expr *E); 5330 5331 // DefaultFunctionArrayLvalueConversion - converts functions and 5332 // arrays to their respective pointers and performs the 5333 // lvalue-to-rvalue conversion. 5334 ExprResult DefaultFunctionArrayLvalueConversion(Expr *E); 5335 5336 // DefaultLvalueConversion - performs lvalue-to-rvalue conversion on 5337 // the operand. This is DefaultFunctionArrayLvalueConversion, 5338 // except that it assumes the operand isn't of function or array 5339 // type. 5340 ExprResult DefaultLvalueConversion(Expr *E); 5341 5342 // DefaultArgumentPromotion (C99 6.5.2.2p6). Used for function calls that 5343 // do not have a prototype. Integer promotions are performed on each 5344 // argument, and arguments that have type float are promoted to double. 5345 ExprResult DefaultArgumentPromotion(Expr *E); 5346 5347 // Used for emitting the right warning by DefaultVariadicArgumentPromotion 5348 enum VariadicCallType { 5349 VariadicFunction, 5350 VariadicBlock, 5351 VariadicMethod, 5352 VariadicConstructor, 5353 VariadicDoesNotApply 5354 }; 5355 5356 /// GatherArgumentsForCall - Collector argument expressions for various 5357 /// form of call prototypes. 5358 bool GatherArgumentsForCall(SourceLocation CallLoc, 5359 FunctionDecl *FDecl, 5360 const FunctionProtoType *Proto, 5361 unsigned FirstProtoArg, 5362 Expr **Args, unsigned NumArgs, 5363 SmallVector<Expr *, 8> &AllArgs, 5364 VariadicCallType CallType = VariadicDoesNotApply); 5365 5366 // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but 5367 // will warn if the resulting type is not a POD type. 5368 ExprResult DefaultVariadicArgumentPromotion(Expr *E, VariadicCallType CT, 5369 FunctionDecl *FDecl); 5370 5371 // UsualArithmeticConversions - performs the UsualUnaryConversions on it's 5372 // operands and then handles various conversions that are common to binary 5373 // operators (C99 6.3.1.8). If both operands aren't arithmetic, this 5374 // routine returns the first non-arithmetic type found. The client is 5375 // responsible for emitting appropriate error diagnostics. 5376 QualType UsualArithmeticConversions(ExprResult &lExpr, ExprResult &rExpr, 5377 bool isCompAssign = false); 5378 5379 /// AssignConvertType - All of the 'assignment' semantic checks return this 5380 /// enum to indicate whether the assignment was allowed. These checks are 5381 /// done for simple assignments, as well as initialization, return from 5382 /// function, argument passing, etc. The query is phrased in terms of a 5383 /// source and destination type. 5384 enum AssignConvertType { 5385 /// Compatible - the types are compatible according to the standard. 5386 Compatible, 5387 5388 /// PointerToInt - The assignment converts a pointer to an int, which we 5389 /// accept as an extension. 5390 PointerToInt, 5391 5392 /// IntToPointer - The assignment converts an int to a pointer, which we 5393 /// accept as an extension. 5394 IntToPointer, 5395 5396 /// FunctionVoidPointer - The assignment is between a function pointer and 5397 /// void*, which the standard doesn't allow, but we accept as an extension. 5398 FunctionVoidPointer, 5399 5400 /// IncompatiblePointer - The assignment is between two pointers types that 5401 /// are not compatible, but we accept them as an extension. 5402 IncompatiblePointer, 5403 5404 /// IncompatiblePointer - The assignment is between two pointers types which 5405 /// point to integers which have a different sign, but are otherwise identical. 5406 /// This is a subset of the above, but broken out because it's by far the most 5407 /// common case of incompatible pointers. 5408 IncompatiblePointerSign, 5409 5410 /// CompatiblePointerDiscardsQualifiers - The assignment discards 5411 /// c/v/r qualifiers, which we accept as an extension. 5412 CompatiblePointerDiscardsQualifiers, 5413 5414 /// IncompatiblePointerDiscardsQualifiers - The assignment 5415 /// discards qualifiers that we don't permit to be discarded, 5416 /// like address spaces. 5417 IncompatiblePointerDiscardsQualifiers, 5418 5419 /// IncompatibleNestedPointerQualifiers - The assignment is between two 5420 /// nested pointer types, and the qualifiers other than the first two 5421 /// levels differ e.g. char ** -> const char **, but we accept them as an 5422 /// extension. 5423 IncompatibleNestedPointerQualifiers, 5424 5425 /// IncompatibleVectors - The assignment is between two vector types that 5426 /// have the same size, which we accept as an extension. 5427 IncompatibleVectors, 5428 5429 /// IntToBlockPointer - The assignment converts an int to a block 5430 /// pointer. We disallow this. 5431 IntToBlockPointer, 5432 5433 /// IncompatibleBlockPointer - The assignment is between two block 5434 /// pointers types that are not compatible. 5435 IncompatibleBlockPointer, 5436 5437 /// IncompatibleObjCQualifiedId - The assignment is between a qualified 5438 /// id type and something else (that is incompatible with it). For example, 5439 /// "id <XXX>" = "Foo *", where "Foo *" doesn't implement the XXX protocol. 5440 IncompatibleObjCQualifiedId, 5441 5442 /// IncompatibleObjCWeakRef - Assigning a weak-unavailable object to an 5443 /// object with __weak qualifier. 5444 IncompatibleObjCWeakRef, 5445 5446 /// Incompatible - We reject this conversion outright, it is invalid to 5447 /// represent it in the AST. 5448 Incompatible 5449 }; 5450 5451 /// DiagnoseAssignmentResult - Emit a diagnostic, if required, for the 5452 /// assignment conversion type specified by ConvTy. This returns true if the 5453 /// conversion was invalid or false if the conversion was accepted. 5454 bool DiagnoseAssignmentResult(AssignConvertType ConvTy, 5455 SourceLocation Loc, 5456 QualType DstType, QualType SrcType, 5457 Expr *SrcExpr, AssignmentAction Action, 5458 bool *Complained = 0); 5459 5460 /// CheckAssignmentConstraints - Perform type checking for assignment, 5461 /// argument passing, variable initialization, and function return values. 5462 /// C99 6.5.16. 5463 AssignConvertType CheckAssignmentConstraints(SourceLocation Loc, 5464 QualType lhs, QualType rhs); 5465 5466 /// Check assignment constraints and prepare for a conversion of the 5467 /// RHS to the LHS type. 5468 AssignConvertType CheckAssignmentConstraints(QualType lhs, ExprResult &rhs, 5469 CastKind &Kind); 5470 5471 // CheckSingleAssignmentConstraints - Currently used by 5472 // CheckAssignmentOperands, and ActOnReturnStmt. Prior to type checking, 5473 // this routine performs the default function/array converions. 5474 AssignConvertType CheckSingleAssignmentConstraints(QualType lhs, 5475 ExprResult &rExprRes); 5476 5477 // \brief If the lhs type is a transparent union, check whether we 5478 // can initialize the transparent union with the given expression. 5479 AssignConvertType CheckTransparentUnionArgumentConstraints(QualType lhs, 5480 ExprResult &rExpr); 5481 5482 bool IsStringLiteralToNonConstPointerConversion(Expr *From, QualType ToType); 5483 5484 bool CheckExceptionSpecCompatibility(Expr *From, QualType ToType); 5485 5486 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5487 AssignmentAction Action, 5488 bool AllowExplicit = false); 5489 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5490 AssignmentAction Action, 5491 bool AllowExplicit, 5492 ImplicitConversionSequence& ICS); 5493 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5494 const ImplicitConversionSequence& ICS, 5495 AssignmentAction Action, 5496 CheckedConversionKind CCK 5497 = CCK_ImplicitConversion); 5498 ExprResult PerformImplicitConversion(Expr *From, QualType ToType, 5499 const StandardConversionSequence& SCS, 5500 AssignmentAction Action, 5501 CheckedConversionKind CCK); 5502 5503 /// the following "Check" methods will return a valid/converted QualType 5504 /// or a null QualType (indicating an error diagnostic was issued). 5505 5506 /// type checking binary operators (subroutines of CreateBuiltinBinOp). 5507 QualType InvalidOperands(SourceLocation l, ExprResult &lex, ExprResult &rex); 5508 QualType CheckPointerToMemberOperands( // C++ 5.5 5509 ExprResult &lex, ExprResult &rex, ExprValueKind &VK, 5510 SourceLocation OpLoc, bool isIndirect); 5511 QualType CheckMultiplyDivideOperands( // C99 6.5.5 5512 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign, 5513 bool isDivide); 5514 QualType CheckRemainderOperands( // C99 6.5.5 5515 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5516 QualType CheckAdditionOperands( // C99 6.5.6 5517 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5518 QualType CheckSubtractionOperands( // C99 6.5.6 5519 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, QualType* CompLHSTy = 0); 5520 QualType CheckShiftOperands( // C99 6.5.7 5521 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5522 bool isCompAssign = false); 5523 QualType CheckCompareOperands( // C99 6.5.8/9 5524 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc, 5525 bool isRelational); 5526 QualType CheckBitwiseOperands( // C99 6.5.[10...12] 5527 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, bool isCompAssign = false); 5528 QualType CheckLogicalOperands( // C99 6.5.[13,14] 5529 ExprResult &lex, ExprResult &rex, SourceLocation OpLoc, unsigned Opc); 5530 // CheckAssignmentOperands is used for both simple and compound assignment. 5531 // For simple assignment, pass both expressions and a null converted type. 5532 // For compound assignment, pass both expressions and the converted type. 5533 QualType CheckAssignmentOperands( // C99 6.5.16.[1,2] 5534 Expr *lex, ExprResult &rex, SourceLocation OpLoc, QualType convertedType); 5535 5536 void ConvertPropertyForLValue(ExprResult &LHS, ExprResult &RHS, QualType& LHSTy); 5537 ExprResult ConvertPropertyForRValue(Expr *E); 5538 5539 QualType CheckConditionalOperands( // C99 6.5.15 5540 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5541 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5542 QualType CXXCheckConditionalOperands( // C++ 5.16 5543 ExprResult &cond, ExprResult &lhs, ExprResult &rhs, 5544 ExprValueKind &VK, ExprObjectKind &OK, SourceLocation questionLoc); 5545 QualType FindCompositePointerType(SourceLocation Loc, Expr *&E1, Expr *&E2, 5546 bool *NonStandardCompositeType = 0); 5547 QualType FindCompositePointerType(SourceLocation Loc, ExprResult &E1, ExprResult &E2, 5548 bool *NonStandardCompositeType = 0) { 5549 Expr *E1Tmp = E1.take(), *E2Tmp = E2.take(); 5550 QualType Composite = FindCompositePointerType(Loc, E1Tmp, E2Tmp, NonStandardCompositeType); 5551 E1 = Owned(E1Tmp); 5552 E2 = Owned(E2Tmp); 5553 return Composite; 5554 } 5555 5556 QualType FindCompositeObjCPointerType(ExprResult &LHS, ExprResult &RHS, 5557 SourceLocation questionLoc); 5558 5559 bool DiagnoseConditionalForNull(Expr *LHS, Expr *RHS, 5560 SourceLocation QuestionLoc); 5561 5562 /// type checking for vector binary operators. 5563 QualType CheckVectorOperands(ExprResult &lex, ExprResult &rex, 5564 SourceLocation Loc, bool isCompAssign); 5565 QualType CheckVectorCompareOperands(ExprResult &lex, ExprResult &rx, 5566 SourceLocation l, bool isRel); 5567 5568 /// type checking declaration initializers (C99 6.7.8) 5569 bool CheckInitList(const InitializedEntity &Entity, 5570 InitListExpr *&InitList, QualType &DeclType); 5571 bool CheckForConstantInitializer(Expr *e, QualType t); 5572 5573 // type checking C++ declaration initializers (C++ [dcl.init]). 5574 5575 /// ReferenceCompareResult - Expresses the result of comparing two 5576 /// types (cv1 T1 and cv2 T2) to determine their compatibility for the 5577 /// purposes of initialization by reference (C++ [dcl.init.ref]p4). 5578 enum ReferenceCompareResult { 5579 /// Ref_Incompatible - The two types are incompatible, so direct 5580 /// reference binding is not possible. 5581 Ref_Incompatible = 0, 5582 /// Ref_Related - The two types are reference-related, which means 5583 /// that their unqualified forms (T1 and T2) are either the same 5584 /// or T1 is a base class of T2. 5585 Ref_Related, 5586 /// Ref_Compatible_With_Added_Qualification - The two types are 5587 /// reference-compatible with added qualification, meaning that 5588 /// they are reference-compatible and the qualifiers on T1 (cv1) 5589 /// are greater than the qualifiers on T2 (cv2). 5590 Ref_Compatible_With_Added_Qualification, 5591 /// Ref_Compatible - The two types are reference-compatible and 5592 /// have equivalent qualifiers (cv1 == cv2). 5593 Ref_Compatible 5594 }; 5595 5596 ReferenceCompareResult CompareReferenceRelationship(SourceLocation Loc, 5597 QualType T1, QualType T2, 5598 bool &DerivedToBase, 5599 bool &ObjCConversion, 5600 bool &ObjCLifetimeConversion); 5601 5602 /// CheckCastTypes - Check type constraints for casting between types under 5603 /// C semantics, or forward to CXXCheckCStyleCast in C++. 5604 ExprResult CheckCastTypes(SourceLocation CastStartLoc, SourceRange TyRange, 5605 QualType CastTy, Expr *CastExpr, CastKind &Kind, 5606 ExprValueKind &VK, CXXCastPath &BasePath, 5607 bool FunctionalStyle = false); 5608 5609 ExprResult checkUnknownAnyCast(SourceRange TyRange, QualType castType, 5610 Expr *castExpr, CastKind &castKind, 5611 ExprValueKind &valueKind, CXXCastPath &BasePath); 5612 5613 // CheckVectorCast - check type constraints for vectors. 5614 // Since vectors are an extension, there are no C standard reference for this. 5615 // We allow casting between vectors and integer datatypes of the same size. 5616 // returns true if the cast is invalid 5617 bool CheckVectorCast(SourceRange R, QualType VectorTy, QualType Ty, 5618 CastKind &Kind); 5619 5620 // CheckExtVectorCast - check type constraints for extended vectors. 5621 // Since vectors are an extension, there are no C standard reference for this. 5622 // We allow casting between vectors and integer datatypes of the same size, 5623 // or vectors and the element type of that vector. 5624 // returns the cast expr 5625 ExprResult CheckExtVectorCast(SourceRange R, QualType VectorTy, Expr *CastExpr, 5626 CastKind &Kind); 5627 5628 /// CXXCheckCStyleCast - Check constraints of a C-style or function-style 5629 /// cast under C++ semantics. 5630 ExprResult CXXCheckCStyleCast(SourceRange R, QualType CastTy, ExprValueKind &VK, 5631 Expr *CastExpr, CastKind &Kind, 5632 CXXCastPath &BasePath, bool FunctionalStyle); 5633 5634 /// \brief Checks for valid expressions which can be cast to an ObjC 5635 /// pointer without needing a bridge cast. 5636 bool ValidObjCARCNoBridgeCastExpr(Expr *&Exp, QualType castType); 5637 5638 /// \brief Checks for invalid conversions and casts between 5639 /// retainable pointers and other pointer kinds. 5640 void CheckObjCARCConversion(SourceRange castRange, QualType castType, 5641 Expr *&op, CheckedConversionKind CCK); 5642 5643 bool CheckObjCARCUnavailableWeakConversion(QualType castType, 5644 QualType ExprType); 5645 5646 /// checkRetainCycles - Check whether an Objective-C message send 5647 /// might create an obvious retain cycle. 5648 void checkRetainCycles(ObjCMessageExpr *msg); 5649 void checkRetainCycles(Expr *receiver, Expr *argument); 5650 5651 /// checkUnsafeAssigns - Check whether +1 expr is being assigned 5652 /// to weak/__unsafe_unretained type. 5653 bool checkUnsafeAssigns(SourceLocation Loc, QualType LHS, Expr *RHS); 5654 5655 /// checkUnsafeExprAssigns - Check whether +1 expr is being assigned 5656 /// to weak/__unsafe_unretained expression. 5657 void checkUnsafeExprAssigns(SourceLocation Loc, Expr *LHS, Expr *RHS); 5658 5659 /// CheckMessageArgumentTypes - Check types in an Obj-C message send. 5660 /// \param Method - May be null. 5661 /// \param [out] ReturnType - The return type of the send. 5662 /// \return true iff there were any incompatible types. 5663 bool CheckMessageArgumentTypes(QualType ReceiverType, 5664 Expr **Args, unsigned NumArgs, Selector Sel, 5665 ObjCMethodDecl *Method, bool isClassMessage, 5666 bool isSuperMessage, 5667 SourceLocation lbrac, SourceLocation rbrac, 5668 QualType &ReturnType, ExprValueKind &VK); 5669 5670 /// \brief Determine the result of a message send expression based on 5671 /// the type of the receiver, the method expected to receive the message, 5672 /// and the form of the message send. 5673 QualType getMessageSendResultType(QualType ReceiverType, 5674 ObjCMethodDecl *Method, 5675 bool isClassMessage, bool isSuperMessage); 5676 5677 /// \brief If the given expression involves a message send to a method 5678 /// with a related result type, emit a note describing what happened. 5679 void EmitRelatedResultTypeNote(const Expr *E); 5680 5681 /// CheckBooleanCondition - Diagnose problems involving the use of 5682 /// the given expression as a boolean condition (e.g. in an if 5683 /// statement). Also performs the standard function and array 5684 /// decays, possibly changing the input variable. 5685 /// 5686 /// \param Loc - A location associated with the condition, e.g. the 5687 /// 'if' keyword. 5688 /// \return true iff there were any errors 5689 ExprResult CheckBooleanCondition(Expr *CondExpr, SourceLocation Loc); 5690 5691 ExprResult ActOnBooleanCondition(Scope *S, SourceLocation Loc, 5692 Expr *SubExpr); 5693 5694 /// DiagnoseAssignmentAsCondition - Given that an expression is 5695 /// being used as a boolean condition, warn if it's an assignment. 5696 void DiagnoseAssignmentAsCondition(Expr *E); 5697 5698 /// \brief Redundant parentheses over an equality comparison can indicate 5699 /// that the user intended an assignment used as condition. 5700 void DiagnoseEqualityWithExtraParens(ParenExpr *parenE); 5701 5702 /// CheckCXXBooleanCondition - Returns true if conversion to bool is invalid. 5703 ExprResult CheckCXXBooleanCondition(Expr *CondExpr); 5704 5705 /// ConvertIntegerToTypeWarnOnOverflow - Convert the specified APInt to have 5706 /// the specified width and sign. If an overflow occurs, detect it and emit 5707 /// the specified diagnostic. 5708 void ConvertIntegerToTypeWarnOnOverflow(llvm::APSInt &OldVal, 5709 unsigned NewWidth, bool NewSign, 5710 SourceLocation Loc, unsigned DiagID); 5711 5712 /// Checks that the Objective-C declaration is declared in the global scope. 5713 /// Emits an error and marks the declaration as invalid if it's not declared 5714 /// in the global scope. 5715 bool CheckObjCDeclScope(Decl *D); 5716 5717 /// VerifyIntegerConstantExpression - verifies that an expression is an ICE, 5718 /// and reports the appropriate diagnostics. Returns false on success. 5719 /// Can optionally return the value of the expression. 5720 bool VerifyIntegerConstantExpression(const Expr *E, llvm::APSInt *Result = 0); 5721 5722 /// VerifyBitField - verifies that a bit field expression is an ICE and has 5723 /// the correct width, and that the field type is valid. 5724 /// Returns false on success. 5725 /// Can optionally return whether the bit-field is of width 0 5726 bool VerifyBitField(SourceLocation FieldLoc, IdentifierInfo *FieldName, 5727 QualType FieldTy, const Expr *BitWidth, 5728 bool *ZeroWidth = 0); 5729 5730 /// \name Code completion 5731 //@{ 5732 /// \brief Describes the context in which code completion occurs. 5733 enum ParserCompletionContext { 5734 /// \brief Code completion occurs at top-level or namespace context. 5735 PCC_Namespace, 5736 /// \brief Code completion occurs within a class, struct, or union. 5737 PCC_Class, 5738 /// \brief Code completion occurs within an Objective-C interface, protocol, 5739 /// or category. 5740 PCC_ObjCInterface, 5741 /// \brief Code completion occurs within an Objective-C implementation or 5742 /// category implementation 5743 PCC_ObjCImplementation, 5744 /// \brief Code completion occurs within the list of instance variables 5745 /// in an Objective-C interface, protocol, category, or implementation. 5746 PCC_ObjCInstanceVariableList, 5747 /// \brief Code completion occurs following one or more template 5748 /// headers. 5749 PCC_Template, 5750 /// \brief Code completion occurs following one or more template 5751 /// headers within a class. 5752 PCC_MemberTemplate, 5753 /// \brief Code completion occurs within an expression. 5754 PCC_Expression, 5755 /// \brief Code completion occurs within a statement, which may 5756 /// also be an expression or a declaration. 5757 PCC_Statement, 5758 /// \brief Code completion occurs at the beginning of the 5759 /// initialization statement (or expression) in a for loop. 5760 PCC_ForInit, 5761 /// \brief Code completion occurs within the condition of an if, 5762 /// while, switch, or for statement. 5763 PCC_Condition, 5764 /// \brief Code completion occurs within the body of a function on a 5765 /// recovery path, where we do not have a specific handle on our position 5766 /// in the grammar. 5767 PCC_RecoveryInFunction, 5768 /// \brief Code completion occurs where only a type is permitted. 5769 PCC_Type, 5770 /// \brief Code completion occurs in a parenthesized expression, which 5771 /// might also be a type cast. 5772 PCC_ParenthesizedExpression, 5773 /// \brief Code completion occurs within a sequence of declaration 5774 /// specifiers within a function, method, or block. 5775 PCC_LocalDeclarationSpecifiers 5776 }; 5777 5778 void CodeCompleteOrdinaryName(Scope *S, 5779 ParserCompletionContext CompletionContext); 5780 void CodeCompleteDeclSpec(Scope *S, DeclSpec &DS, 5781 bool AllowNonIdentifiers, 5782 bool AllowNestedNameSpecifiers); 5783 5784 struct CodeCompleteExpressionData; 5785 void CodeCompleteExpression(Scope *S, 5786 const CodeCompleteExpressionData &Data); 5787 void CodeCompleteMemberReferenceExpr(Scope *S, Expr *Base, 5788 SourceLocation OpLoc, 5789 bool IsArrow); 5790 void CodeCompletePostfixExpression(Scope *S, ExprResult LHS); 5791 void CodeCompleteTag(Scope *S, unsigned TagSpec); 5792 void CodeCompleteTypeQualifiers(DeclSpec &DS); 5793 void CodeCompleteCase(Scope *S); 5794 void CodeCompleteCall(Scope *S, Expr *Fn, Expr **Args, unsigned NumArgs); 5795 void CodeCompleteInitializer(Scope *S, Decl *D); 5796 void CodeCompleteReturn(Scope *S); 5797 void CodeCompleteAssignmentRHS(Scope *S, Expr *LHS); 5798 5799 void CodeCompleteQualifiedId(Scope *S, CXXScopeSpec &SS, 5800 bool EnteringContext); 5801 void CodeCompleteUsing(Scope *S); 5802 void CodeCompleteUsingDirective(Scope *S); 5803 void CodeCompleteNamespaceDecl(Scope *S); 5804 void CodeCompleteNamespaceAliasDecl(Scope *S); 5805 void CodeCompleteOperatorName(Scope *S); 5806 void CodeCompleteConstructorInitializer(Decl *Constructor, 5807 CXXCtorInitializer** Initializers, 5808 unsigned NumInitializers); 5809 5810 void CodeCompleteObjCAtDirective(Scope *S, Decl *ObjCImpDecl, 5811 bool InInterface); 5812 void CodeCompleteObjCAtVisibility(Scope *S); 5813 void CodeCompleteObjCAtStatement(Scope *S); 5814 void CodeCompleteObjCAtExpression(Scope *S); 5815 void CodeCompleteObjCPropertyFlags(Scope *S, ObjCDeclSpec &ODS); 5816 void CodeCompleteObjCPropertyGetter(Scope *S, Decl *ClassDecl); 5817 void CodeCompleteObjCPropertySetter(Scope *S, Decl *ClassDecl); 5818 void CodeCompleteObjCPassingType(Scope *S, ObjCDeclSpec &DS, 5819 bool IsParameter); 5820 void CodeCompleteObjCMessageReceiver(Scope *S); 5821 void CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc, 5822 IdentifierInfo **SelIdents, 5823 unsigned NumSelIdents, 5824 bool AtArgumentExpression); 5825 void CodeCompleteObjCClassMessage(Scope *S, ParsedType Receiver, 5826 IdentifierInfo **SelIdents, 5827 unsigned NumSelIdents, 5828 bool AtArgumentExpression, 5829 bool IsSuper = false); 5830 void CodeCompleteObjCInstanceMessage(Scope *S, ExprTy *Receiver, 5831 IdentifierInfo **SelIdents, 5832 unsigned NumSelIdents, 5833 bool AtArgumentExpression, 5834 ObjCInterfaceDecl *Super = 0); 5835 void CodeCompleteObjCForCollection(Scope *S, 5836 DeclGroupPtrTy IterationVar); 5837 void CodeCompleteObjCSelector(Scope *S, 5838 IdentifierInfo **SelIdents, 5839 unsigned NumSelIdents); 5840 void CodeCompleteObjCProtocolReferences(IdentifierLocPair *Protocols, 5841 unsigned NumProtocols); 5842 void CodeCompleteObjCProtocolDecl(Scope *S); 5843 void CodeCompleteObjCInterfaceDecl(Scope *S); 5844 void CodeCompleteObjCSuperclass(Scope *S, 5845 IdentifierInfo *ClassName, 5846 SourceLocation ClassNameLoc); 5847 void CodeCompleteObjCImplementationDecl(Scope *S); 5848 void CodeCompleteObjCInterfaceCategory(Scope *S, 5849 IdentifierInfo *ClassName, 5850 SourceLocation ClassNameLoc); 5851 void CodeCompleteObjCImplementationCategory(Scope *S, 5852 IdentifierInfo *ClassName, 5853 SourceLocation ClassNameLoc); 5854 void CodeCompleteObjCPropertyDefinition(Scope *S, Decl *ObjCImpDecl); 5855 void CodeCompleteObjCPropertySynthesizeIvar(Scope *S, 5856 IdentifierInfo *PropertyName, 5857 Decl *ObjCImpDecl); 5858 void CodeCompleteObjCMethodDecl(Scope *S, 5859 bool IsInstanceMethod, 5860 ParsedType ReturnType, 5861 Decl *IDecl); 5862 void CodeCompleteObjCMethodDeclSelector(Scope *S, 5863 bool IsInstanceMethod, 5864 bool AtParameterName, 5865 ParsedType ReturnType, 5866 IdentifierInfo **SelIdents, 5867 unsigned NumSelIdents); 5868 void CodeCompletePreprocessorDirective(bool InConditional); 5869 void CodeCompleteInPreprocessorConditionalExclusion(Scope *S); 5870 void CodeCompletePreprocessorMacroName(bool IsDefinition); 5871 void CodeCompletePreprocessorExpression(); 5872 void CodeCompletePreprocessorMacroArgument(Scope *S, 5873 IdentifierInfo *Macro, 5874 MacroInfo *MacroInfo, 5875 unsigned Argument); 5876 void CodeCompleteNaturalLanguage(); 5877 void GatherGlobalCodeCompletions(CodeCompletionAllocator &Allocator, 5878 SmallVectorImpl<CodeCompletionResult> &Results); 5879 //@} 5880 5881 //===--------------------------------------------------------------------===// 5882 // Extra semantic analysis beyond the C type system 5883 5884public: 5885 SourceLocation getLocationOfStringLiteralByte(const StringLiteral *SL, 5886 unsigned ByteNo) const; 5887 5888private: 5889 void CheckArrayAccess(const Expr *E); 5890 bool CheckFunctionCall(FunctionDecl *FDecl, CallExpr *TheCall); 5891 bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall); 5892 5893 bool CheckablePrintfAttr(const FormatAttr *Format, CallExpr *TheCall); 5894 bool CheckObjCString(Expr *Arg); 5895 5896 ExprResult CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5897 bool CheckARMBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall); 5898 5899 bool SemaBuiltinVAStart(CallExpr *TheCall); 5900 bool SemaBuiltinUnorderedCompare(CallExpr *TheCall); 5901 bool SemaBuiltinFPClassification(CallExpr *TheCall, unsigned NumArgs); 5902 5903public: 5904 // Used by C++ template instantiation. 5905 ExprResult SemaBuiltinShuffleVector(CallExpr *TheCall); 5906 5907private: 5908 bool SemaBuiltinPrefetch(CallExpr *TheCall); 5909 bool SemaBuiltinObjectSize(CallExpr *TheCall); 5910 bool SemaBuiltinLongjmp(CallExpr *TheCall); 5911 ExprResult SemaBuiltinAtomicOverloaded(ExprResult TheCallResult); 5912 bool SemaBuiltinConstantArg(CallExpr *TheCall, int ArgNum, 5913 llvm::APSInt &Result); 5914 5915 bool SemaCheckStringLiteral(const Expr *E, const CallExpr *TheCall, 5916 bool HasVAListArg, unsigned format_idx, 5917 unsigned firstDataArg, bool isPrintf); 5918 5919 void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr, 5920 const CallExpr *TheCall, bool HasVAListArg, 5921 unsigned format_idx, unsigned firstDataArg, 5922 bool isPrintf); 5923 5924 void CheckNonNullArguments(const NonNullAttr *NonNull, 5925 const Expr * const *ExprArgs, 5926 SourceLocation CallSiteLoc); 5927 5928 void CheckPrintfScanfArguments(const CallExpr *TheCall, bool HasVAListArg, 5929 unsigned format_idx, unsigned firstDataArg, 5930 bool isPrintf); 5931 5932 /// \brief Enumeration used to describe which of the memory setting or copying 5933 /// functions is being checked by \c CheckMemsetcpymoveArguments(). 5934 enum CheckedMemoryFunction { 5935 CMF_Memset, 5936 CMF_Memcpy, 5937 CMF_Memmove 5938 }; 5939 5940 void CheckMemsetcpymoveArguments(const CallExpr *Call, 5941 CheckedMemoryFunction CMF, 5942 IdentifierInfo *FnName); 5943 5944 void CheckReturnStackAddr(Expr *RetValExp, QualType lhsType, 5945 SourceLocation ReturnLoc); 5946 void CheckFloatComparison(SourceLocation loc, Expr* lex, Expr* rex); 5947 void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation()); 5948 5949 void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field, 5950 Expr *Init); 5951 5952 /// \brief The parser's current scope. 5953 /// 5954 /// The parser maintains this state here. 5955 Scope *CurScope; 5956 5957protected: 5958 friend class Parser; 5959 friend class InitializationSequence; 5960 friend class ASTReader; 5961 friend class ASTWriter; 5962 5963public: 5964 /// \brief Retrieve the parser's current scope. 5965 /// 5966 /// This routine must only be used when it is certain that semantic analysis 5967 /// and the parser are in precisely the same context, which is not the case 5968 /// when, e.g., we are performing any kind of template instantiation. 5969 /// Therefore, the only safe places to use this scope are in the parser 5970 /// itself and in routines directly invoked from the parser and *never* from 5971 /// template substitution or instantiation. 5972 Scope *getCurScope() const { return CurScope; } 5973}; 5974 5975/// \brief RAII object that enters a new expression evaluation context. 5976class EnterExpressionEvaluationContext { 5977 Sema &Actions; 5978 5979public: 5980 EnterExpressionEvaluationContext(Sema &Actions, 5981 Sema::ExpressionEvaluationContext NewContext) 5982 : Actions(Actions) { 5983 Actions.PushExpressionEvaluationContext(NewContext); 5984 } 5985 5986 ~EnterExpressionEvaluationContext() { 5987 Actions.PopExpressionEvaluationContext(); 5988 } 5989}; 5990 5991} // end namespace clang 5992 5993#endif 5994