ParseDeclCXX.cpp revision 205219
1//===--- ParseDeclCXX.cpp - C++ Declaration Parsing -----------------------===// 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 implements the C++ Declaration portions of the Parser interfaces. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Basic/OperatorKinds.h" 15#include "clang/Parse/Parser.h" 16#include "clang/Parse/ParseDiagnostic.h" 17#include "clang/Parse/DeclSpec.h" 18#include "clang/Parse/Scope.h" 19#include "clang/Parse/Template.h" 20#include "RAIIObjectsForParser.h" 21using namespace clang; 22 23/// ParseNamespace - We know that the current token is a namespace keyword. This 24/// may either be a top level namespace or a block-level namespace alias. 25/// 26/// namespace-definition: [C++ 7.3: basic.namespace] 27/// named-namespace-definition 28/// unnamed-namespace-definition 29/// 30/// unnamed-namespace-definition: 31/// 'namespace' attributes[opt] '{' namespace-body '}' 32/// 33/// named-namespace-definition: 34/// original-namespace-definition 35/// extension-namespace-definition 36/// 37/// original-namespace-definition: 38/// 'namespace' identifier attributes[opt] '{' namespace-body '}' 39/// 40/// extension-namespace-definition: 41/// 'namespace' original-namespace-name '{' namespace-body '}' 42/// 43/// namespace-alias-definition: [C++ 7.3.2: namespace.alias] 44/// 'namespace' identifier '=' qualified-namespace-specifier ';' 45/// 46Parser::DeclPtrTy Parser::ParseNamespace(unsigned Context, 47 SourceLocation &DeclEnd) { 48 assert(Tok.is(tok::kw_namespace) && "Not a namespace!"); 49 SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'. 50 51 if (Tok.is(tok::code_completion)) { 52 Actions.CodeCompleteNamespaceDecl(CurScope); 53 ConsumeToken(); 54 } 55 56 SourceLocation IdentLoc; 57 IdentifierInfo *Ident = 0; 58 59 Token attrTok; 60 61 if (Tok.is(tok::identifier)) { 62 Ident = Tok.getIdentifierInfo(); 63 IdentLoc = ConsumeToken(); // eat the identifier. 64 } 65 66 // Read label attributes, if present. 67 llvm::OwningPtr<AttributeList> AttrList; 68 if (Tok.is(tok::kw___attribute)) { 69 attrTok = Tok; 70 71 // FIXME: save these somewhere. 72 AttrList.reset(ParseGNUAttributes()); 73 } 74 75 if (Tok.is(tok::equal)) { 76 if (AttrList) 77 Diag(attrTok, diag::err_unexpected_namespace_attributes_alias); 78 79 return ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd); 80 } 81 82 if (Tok.isNot(tok::l_brace)) { 83 Diag(Tok, Ident ? diag::err_expected_lbrace : 84 diag::err_expected_ident_lbrace); 85 return DeclPtrTy(); 86 } 87 88 SourceLocation LBrace = ConsumeBrace(); 89 90 // Enter a scope for the namespace. 91 ParseScope NamespaceScope(this, Scope::DeclScope); 92 93 DeclPtrTy NamespcDecl = 94 Actions.ActOnStartNamespaceDef(CurScope, IdentLoc, Ident, LBrace, 95 AttrList.get()); 96 97 PrettyStackTraceActionsDecl CrashInfo(NamespcDecl, NamespaceLoc, Actions, 98 PP.getSourceManager(), 99 "parsing namespace"); 100 101 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 102 CXX0XAttributeList Attr; 103 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) 104 Attr = ParseCXX0XAttributes(); 105 ParseExternalDeclaration(Attr); 106 } 107 108 // Leave the namespace scope. 109 NamespaceScope.Exit(); 110 111 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBrace); 112 Actions.ActOnFinishNamespaceDef(NamespcDecl, RBraceLoc); 113 114 DeclEnd = RBraceLoc; 115 return NamespcDecl; 116} 117 118/// ParseNamespaceAlias - Parse the part after the '=' in a namespace 119/// alias definition. 120/// 121Parser::DeclPtrTy Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc, 122 SourceLocation AliasLoc, 123 IdentifierInfo *Alias, 124 SourceLocation &DeclEnd) { 125 assert(Tok.is(tok::equal) && "Not equal token"); 126 127 ConsumeToken(); // eat the '='. 128 129 if (Tok.is(tok::code_completion)) { 130 Actions.CodeCompleteNamespaceAliasDecl(CurScope); 131 ConsumeToken(); 132 } 133 134 CXXScopeSpec SS; 135 // Parse (optional) nested-name-specifier. 136 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 137 138 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 139 Diag(Tok, diag::err_expected_namespace_name); 140 // Skip to end of the definition and eat the ';'. 141 SkipUntil(tok::semi); 142 return DeclPtrTy(); 143 } 144 145 // Parse identifier. 146 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 147 SourceLocation IdentLoc = ConsumeToken(); 148 149 // Eat the ';'. 150 DeclEnd = Tok.getLocation(); 151 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name, 152 "", tok::semi); 153 154 return Actions.ActOnNamespaceAliasDef(CurScope, NamespaceLoc, AliasLoc, Alias, 155 SS, IdentLoc, Ident); 156} 157 158/// ParseLinkage - We know that the current token is a string_literal 159/// and just before that, that extern was seen. 160/// 161/// linkage-specification: [C++ 7.5p2: dcl.link] 162/// 'extern' string-literal '{' declaration-seq[opt] '}' 163/// 'extern' string-literal declaration 164/// 165Parser::DeclPtrTy Parser::ParseLinkage(ParsingDeclSpec &DS, 166 unsigned Context) { 167 assert(Tok.is(tok::string_literal) && "Not a string literal!"); 168 llvm::SmallString<8> LangBuffer; 169 // LangBuffer is guaranteed to be big enough. 170 llvm::StringRef Lang = PP.getSpelling(Tok, LangBuffer); 171 172 SourceLocation Loc = ConsumeStringToken(); 173 174 ParseScope LinkageScope(this, Scope::DeclScope); 175 DeclPtrTy LinkageSpec 176 = Actions.ActOnStartLinkageSpecification(CurScope, 177 /*FIXME: */SourceLocation(), 178 Loc, Lang.data(), Lang.size(), 179 Tok.is(tok::l_brace)? Tok.getLocation() 180 : SourceLocation()); 181 182 CXX0XAttributeList Attr; 183 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 184 Attr = ParseCXX0XAttributes(); 185 } 186 187 if (Tok.isNot(tok::l_brace)) { 188 ParseDeclarationOrFunctionDefinition(DS, Attr.AttrList); 189 return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, 190 SourceLocation()); 191 } 192 193 DS.abort(); 194 195 if (Attr.HasAttr) 196 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 197 << Attr.Range; 198 199 SourceLocation LBrace = ConsumeBrace(); 200 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 201 CXX0XAttributeList Attr; 202 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) 203 Attr = ParseCXX0XAttributes(); 204 ParseExternalDeclaration(Attr); 205 } 206 207 SourceLocation RBrace = MatchRHSPunctuation(tok::r_brace, LBrace); 208 return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, RBrace); 209} 210 211/// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or 212/// using-directive. Assumes that current token is 'using'. 213Parser::DeclPtrTy Parser::ParseUsingDirectiveOrDeclaration(unsigned Context, 214 SourceLocation &DeclEnd, 215 CXX0XAttributeList Attr) { 216 assert(Tok.is(tok::kw_using) && "Not using token"); 217 218 // Eat 'using'. 219 SourceLocation UsingLoc = ConsumeToken(); 220 221 if (Tok.is(tok::code_completion)) { 222 Actions.CodeCompleteUsing(CurScope); 223 ConsumeToken(); 224 } 225 226 if (Tok.is(tok::kw_namespace)) 227 // Next token after 'using' is 'namespace' so it must be using-directive 228 return ParseUsingDirective(Context, UsingLoc, DeclEnd, Attr.AttrList); 229 230 if (Attr.HasAttr) 231 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 232 << Attr.Range; 233 234 // Otherwise, it must be using-declaration. 235 // Ignore illegal attributes (the caller should already have issued an error. 236 return ParseUsingDeclaration(Context, UsingLoc, DeclEnd); 237} 238 239/// ParseUsingDirective - Parse C++ using-directive, assumes 240/// that current token is 'namespace' and 'using' was already parsed. 241/// 242/// using-directive: [C++ 7.3.p4: namespace.udir] 243/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 244/// namespace-name ; 245/// [GNU] using-directive: 246/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 247/// namespace-name attributes[opt] ; 248/// 249Parser::DeclPtrTy Parser::ParseUsingDirective(unsigned Context, 250 SourceLocation UsingLoc, 251 SourceLocation &DeclEnd, 252 AttributeList *Attr) { 253 assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token"); 254 255 // Eat 'namespace'. 256 SourceLocation NamespcLoc = ConsumeToken(); 257 258 if (Tok.is(tok::code_completion)) { 259 Actions.CodeCompleteUsingDirective(CurScope); 260 ConsumeToken(); 261 } 262 263 CXXScopeSpec SS; 264 // Parse (optional) nested-name-specifier. 265 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 266 267 IdentifierInfo *NamespcName = 0; 268 SourceLocation IdentLoc = SourceLocation(); 269 270 // Parse namespace-name. 271 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 272 Diag(Tok, diag::err_expected_namespace_name); 273 // If there was invalid namespace name, skip to end of decl, and eat ';'. 274 SkipUntil(tok::semi); 275 // FIXME: Are there cases, when we would like to call ActOnUsingDirective? 276 return DeclPtrTy(); 277 } 278 279 // Parse identifier. 280 NamespcName = Tok.getIdentifierInfo(); 281 IdentLoc = ConsumeToken(); 282 283 // Parse (optional) attributes (most likely GNU strong-using extension). 284 bool GNUAttr = false; 285 if (Tok.is(tok::kw___attribute)) { 286 GNUAttr = true; 287 Attr = addAttributeLists(Attr, ParseGNUAttributes()); 288 } 289 290 // Eat ';'. 291 DeclEnd = Tok.getLocation(); 292 ExpectAndConsume(tok::semi, 293 GNUAttr ? diag::err_expected_semi_after_attribute_list : 294 diag::err_expected_semi_after_namespace_name, "", tok::semi); 295 296 return Actions.ActOnUsingDirective(CurScope, UsingLoc, NamespcLoc, SS, 297 IdentLoc, NamespcName, Attr); 298} 299 300/// ParseUsingDeclaration - Parse C++ using-declaration. Assumes that 301/// 'using' was already seen. 302/// 303/// using-declaration: [C++ 7.3.p3: namespace.udecl] 304/// 'using' 'typename'[opt] ::[opt] nested-name-specifier 305/// unqualified-id 306/// 'using' :: unqualified-id 307/// 308Parser::DeclPtrTy Parser::ParseUsingDeclaration(unsigned Context, 309 SourceLocation UsingLoc, 310 SourceLocation &DeclEnd, 311 AccessSpecifier AS) { 312 CXXScopeSpec SS; 313 SourceLocation TypenameLoc; 314 bool IsTypeName; 315 316 // Ignore optional 'typename'. 317 // FIXME: This is wrong; we should parse this as a typename-specifier. 318 if (Tok.is(tok::kw_typename)) { 319 TypenameLoc = Tok.getLocation(); 320 ConsumeToken(); 321 IsTypeName = true; 322 } 323 else 324 IsTypeName = false; 325 326 // Parse nested-name-specifier. 327 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 328 329 // Check nested-name specifier. 330 if (SS.isInvalid()) { 331 SkipUntil(tok::semi); 332 return DeclPtrTy(); 333 } 334 335 // Parse the unqualified-id. We allow parsing of both constructor and 336 // destructor names and allow the action module to diagnose any semantic 337 // errors. 338 UnqualifiedId Name; 339 if (ParseUnqualifiedId(SS, 340 /*EnteringContext=*/false, 341 /*AllowDestructorName=*/true, 342 /*AllowConstructorName=*/true, 343 /*ObjectType=*/0, 344 Name)) { 345 SkipUntil(tok::semi); 346 return DeclPtrTy(); 347 } 348 349 // Parse (optional) attributes (most likely GNU strong-using extension). 350 llvm::OwningPtr<AttributeList> AttrList; 351 if (Tok.is(tok::kw___attribute)) 352 AttrList.reset(ParseGNUAttributes()); 353 354 // Eat ';'. 355 DeclEnd = Tok.getLocation(); 356 ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 357 AttrList ? "attributes list" : "using declaration", 358 tok::semi); 359 360 return Actions.ActOnUsingDeclaration(CurScope, AS, true, UsingLoc, SS, Name, 361 AttrList.get(), IsTypeName, TypenameLoc); 362} 363 364/// ParseStaticAssertDeclaration - Parse C++0x static_assert-declaratoion. 365/// 366/// static_assert-declaration: 367/// static_assert ( constant-expression , string-literal ) ; 368/// 369Parser::DeclPtrTy Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){ 370 assert(Tok.is(tok::kw_static_assert) && "Not a static_assert declaration"); 371 SourceLocation StaticAssertLoc = ConsumeToken(); 372 373 if (Tok.isNot(tok::l_paren)) { 374 Diag(Tok, diag::err_expected_lparen); 375 return DeclPtrTy(); 376 } 377 378 SourceLocation LParenLoc = ConsumeParen(); 379 380 OwningExprResult AssertExpr(ParseConstantExpression()); 381 if (AssertExpr.isInvalid()) { 382 SkipUntil(tok::semi); 383 return DeclPtrTy(); 384 } 385 386 if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi)) 387 return DeclPtrTy(); 388 389 if (Tok.isNot(tok::string_literal)) { 390 Diag(Tok, diag::err_expected_string_literal); 391 SkipUntil(tok::semi); 392 return DeclPtrTy(); 393 } 394 395 OwningExprResult AssertMessage(ParseStringLiteralExpression()); 396 if (AssertMessage.isInvalid()) 397 return DeclPtrTy(); 398 399 MatchRHSPunctuation(tok::r_paren, LParenLoc); 400 401 DeclEnd = Tok.getLocation(); 402 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_static_assert); 403 404 return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, move(AssertExpr), 405 move(AssertMessage)); 406} 407 408/// ParseDecltypeSpecifier - Parse a C++0x decltype specifier. 409/// 410/// 'decltype' ( expression ) 411/// 412void Parser::ParseDecltypeSpecifier(DeclSpec &DS) { 413 assert(Tok.is(tok::kw_decltype) && "Not a decltype specifier"); 414 415 SourceLocation StartLoc = ConsumeToken(); 416 SourceLocation LParenLoc = Tok.getLocation(); 417 418 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 419 "decltype")) { 420 SkipUntil(tok::r_paren); 421 return; 422 } 423 424 // Parse the expression 425 426 // C++0x [dcl.type.simple]p4: 427 // The operand of the decltype specifier is an unevaluated operand. 428 EnterExpressionEvaluationContext Unevaluated(Actions, 429 Action::Unevaluated); 430 OwningExprResult Result = ParseExpression(); 431 if (Result.isInvalid()) { 432 SkipUntil(tok::r_paren); 433 return; 434 } 435 436 // Match the ')' 437 SourceLocation RParenLoc; 438 if (Tok.is(tok::r_paren)) 439 RParenLoc = ConsumeParen(); 440 else 441 MatchRHSPunctuation(tok::r_paren, LParenLoc); 442 443 if (RParenLoc.isInvalid()) 444 return; 445 446 const char *PrevSpec = 0; 447 unsigned DiagID; 448 // Check for duplicate type specifiers (e.g. "int decltype(a)"). 449 if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec, 450 DiagID, Result.release())) 451 Diag(StartLoc, DiagID) << PrevSpec; 452} 453 454/// ParseClassName - Parse a C++ class-name, which names a class. Note 455/// that we only check that the result names a type; semantic analysis 456/// will need to verify that the type names a class. The result is 457/// either a type or NULL, depending on whether a type name was 458/// found. 459/// 460/// class-name: [C++ 9.1] 461/// identifier 462/// simple-template-id 463/// 464Parser::TypeResult Parser::ParseClassName(SourceLocation &EndLocation, 465 const CXXScopeSpec *SS) { 466 // Check whether we have a template-id that names a type. 467 if (Tok.is(tok::annot_template_id)) { 468 TemplateIdAnnotation *TemplateId 469 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 470 if (TemplateId->Kind == TNK_Type_template || 471 TemplateId->Kind == TNK_Dependent_template_name) { 472 AnnotateTemplateIdTokenAsType(SS); 473 474 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 475 TypeTy *Type = Tok.getAnnotationValue(); 476 EndLocation = Tok.getAnnotationEndLoc(); 477 ConsumeToken(); 478 479 if (Type) 480 return Type; 481 return true; 482 } 483 484 // Fall through to produce an error below. 485 } 486 487 if (Tok.isNot(tok::identifier)) { 488 Diag(Tok, diag::err_expected_class_name); 489 return true; 490 } 491 492 IdentifierInfo *Id = Tok.getIdentifierInfo(); 493 SourceLocation IdLoc = ConsumeToken(); 494 495 if (Tok.is(tok::less)) { 496 // It looks the user intended to write a template-id here, but the 497 // template-name was wrong. Try to fix that. 498 TemplateNameKind TNK = TNK_Type_template; 499 TemplateTy Template; 500 if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, CurScope, 501 SS, Template, TNK)) { 502 Diag(IdLoc, diag::err_unknown_template_name) 503 << Id; 504 } 505 506 if (!Template) 507 return true; 508 509 // Form the template name 510 UnqualifiedId TemplateName; 511 TemplateName.setIdentifier(Id, IdLoc); 512 513 // Parse the full template-id, then turn it into a type. 514 if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateName, 515 SourceLocation(), true)) 516 return true; 517 if (TNK == TNK_Dependent_template_name) 518 AnnotateTemplateIdTokenAsType(SS); 519 520 // If we didn't end up with a typename token, there's nothing more we 521 // can do. 522 if (Tok.isNot(tok::annot_typename)) 523 return true; 524 525 // Retrieve the type from the annotation token, consume that token, and 526 // return. 527 EndLocation = Tok.getAnnotationEndLoc(); 528 TypeTy *Type = Tok.getAnnotationValue(); 529 ConsumeToken(); 530 return Type; 531 } 532 533 // We have an identifier; check whether it is actually a type. 534 TypeTy *Type = Actions.getTypeName(*Id, IdLoc, CurScope, SS, true); 535 if (!Type) { 536 Diag(IdLoc, diag::err_expected_class_name); 537 return true; 538 } 539 540 // Consume the identifier. 541 EndLocation = IdLoc; 542 return Type; 543} 544 545/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or 546/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which 547/// until we reach the start of a definition or see a token that 548/// cannot start a definition. If SuppressDeclarations is true, we do know. 549/// 550/// class-specifier: [C++ class] 551/// class-head '{' member-specification[opt] '}' 552/// class-head '{' member-specification[opt] '}' attributes[opt] 553/// class-head: 554/// class-key identifier[opt] base-clause[opt] 555/// class-key nested-name-specifier identifier base-clause[opt] 556/// class-key nested-name-specifier[opt] simple-template-id 557/// base-clause[opt] 558/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] 559/// [GNU] class-key attributes[opt] nested-name-specifier 560/// identifier base-clause[opt] 561/// [GNU] class-key attributes[opt] nested-name-specifier[opt] 562/// simple-template-id base-clause[opt] 563/// class-key: 564/// 'class' 565/// 'struct' 566/// 'union' 567/// 568/// elaborated-type-specifier: [C++ dcl.type.elab] 569/// class-key ::[opt] nested-name-specifier[opt] identifier 570/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] 571/// simple-template-id 572/// 573/// Note that the C++ class-specifier and elaborated-type-specifier, 574/// together, subsume the C99 struct-or-union-specifier: 575/// 576/// struct-or-union-specifier: [C99 6.7.2.1] 577/// struct-or-union identifier[opt] '{' struct-contents '}' 578/// struct-or-union identifier 579/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents 580/// '}' attributes[opt] 581/// [GNU] struct-or-union attributes[opt] identifier 582/// struct-or-union: 583/// 'struct' 584/// 'union' 585void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, 586 SourceLocation StartLoc, DeclSpec &DS, 587 const ParsedTemplateInfo &TemplateInfo, 588 AccessSpecifier AS, bool SuppressDeclarations){ 589 DeclSpec::TST TagType; 590 if (TagTokKind == tok::kw_struct) 591 TagType = DeclSpec::TST_struct; 592 else if (TagTokKind == tok::kw_class) 593 TagType = DeclSpec::TST_class; 594 else { 595 assert(TagTokKind == tok::kw_union && "Not a class specifier"); 596 TagType = DeclSpec::TST_union; 597 } 598 599 if (Tok.is(tok::code_completion)) { 600 // Code completion for a struct, class, or union name. 601 Actions.CodeCompleteTag(CurScope, TagType); 602 ConsumeToken(); 603 } 604 605 AttributeList *AttrList = 0; 606 // If attributes exist after tag, parse them. 607 if (Tok.is(tok::kw___attribute)) 608 AttrList = ParseGNUAttributes(); 609 610 // If declspecs exist after tag, parse them. 611 if (Tok.is(tok::kw___declspec)) 612 AttrList = ParseMicrosoftDeclSpec(AttrList); 613 614 // If C++0x attributes exist here, parse them. 615 // FIXME: Are we consistent with the ordering of parsing of different 616 // styles of attributes? 617 if (isCXX0XAttributeSpecifier()) 618 AttrList = addAttributeLists(AttrList, ParseCXX0XAttributes().AttrList); 619 620 if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_pod)) { 621 // GNU libstdc++ 4.2 uses __is_pod as the name of a struct template, but 622 // __is_pod is a keyword in GCC >= 4.3. Therefore, when we see the 623 // token sequence "struct __is_pod", make __is_pod into a normal 624 // identifier rather than a keyword, to allow libstdc++ 4.2 to work 625 // properly. 626 Tok.getIdentifierInfo()->setTokenID(tok::identifier); 627 Tok.setKind(tok::identifier); 628 } 629 630 if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_empty)) { 631 // GNU libstdc++ 4.2 uses __is_empty as the name of a struct template, but 632 // __is_empty is a keyword in GCC >= 4.3. Therefore, when we see the 633 // token sequence "struct __is_empty", make __is_empty into a normal 634 // identifier rather than a keyword, to allow libstdc++ 4.2 to work 635 // properly. 636 Tok.getIdentifierInfo()->setTokenID(tok::identifier); 637 Tok.setKind(tok::identifier); 638 } 639 640 // Parse the (optional) nested-name-specifier. 641 CXXScopeSpec &SS = DS.getTypeSpecScope(); 642 if (getLang().CPlusPlus) { 643 // "FOO : BAR" is not a potential typo for "FOO::BAR". 644 ColonProtectionRAIIObject X(*this); 645 646 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true); 647 if (SS.isSet()) 648 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) 649 Diag(Tok, diag::err_expected_ident); 650 } 651 652 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 653 654 // Parse the (optional) class name or simple-template-id. 655 IdentifierInfo *Name = 0; 656 SourceLocation NameLoc; 657 TemplateIdAnnotation *TemplateId = 0; 658 if (Tok.is(tok::identifier)) { 659 Name = Tok.getIdentifierInfo(); 660 NameLoc = ConsumeToken(); 661 662 if (Tok.is(tok::less)) { 663 // The name was supposed to refer to a template, but didn't. 664 // Eat the template argument list and try to continue parsing this as 665 // a class (or template thereof). 666 TemplateArgList TemplateArgs; 667 SourceLocation LAngleLoc, RAngleLoc; 668 if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, &SS, 669 true, LAngleLoc, 670 TemplateArgs, RAngleLoc)) { 671 // We couldn't parse the template argument list at all, so don't 672 // try to give any location information for the list. 673 LAngleLoc = RAngleLoc = SourceLocation(); 674 } 675 676 Diag(NameLoc, diag::err_explicit_spec_non_template) 677 << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 678 << (TagType == DeclSpec::TST_class? 0 679 : TagType == DeclSpec::TST_struct? 1 680 : 2) 681 << Name 682 << SourceRange(LAngleLoc, RAngleLoc); 683 684 // Strip off the last template parameter list if it was empty, since 685 // we've removed its template argument list. 686 if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) { 687 if (TemplateParams && TemplateParams->size() > 1) { 688 TemplateParams->pop_back(); 689 } else { 690 TemplateParams = 0; 691 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 692 = ParsedTemplateInfo::NonTemplate; 693 } 694 } else if (TemplateInfo.Kind 695 == ParsedTemplateInfo::ExplicitInstantiation) { 696 // Pretend this is just a forward declaration. 697 TemplateParams = 0; 698 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 699 = ParsedTemplateInfo::NonTemplate; 700 const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc 701 = SourceLocation(); 702 const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc 703 = SourceLocation(); 704 } 705 706 707 } 708 } else if (Tok.is(tok::annot_template_id)) { 709 TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 710 NameLoc = ConsumeToken(); 711 712 if (TemplateId->Kind != TNK_Type_template) { 713 // The template-name in the simple-template-id refers to 714 // something other than a class template. Give an appropriate 715 // error message and skip to the ';'. 716 SourceRange Range(NameLoc); 717 if (SS.isNotEmpty()) 718 Range.setBegin(SS.getBeginLoc()); 719 720 Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) 721 << Name << static_cast<int>(TemplateId->Kind) << Range; 722 723 DS.SetTypeSpecError(); 724 SkipUntil(tok::semi, false, true); 725 TemplateId->Destroy(); 726 return; 727 } 728 } 729 730 // There are four options here. If we have 'struct foo;', then this 731 // is either a forward declaration or a friend declaration, which 732 // have to be treated differently. If we have 'struct foo {...' or 733 // 'struct foo :...' then this is a definition. Otherwise we have 734 // something like 'struct foo xyz', a reference. 735 // However, in some contexts, things look like declarations but are just 736 // references, e.g. 737 // new struct s; 738 // or 739 // &T::operator struct s; 740 // For these, SuppressDeclarations is true. 741 Action::TagUseKind TUK; 742 if (SuppressDeclarations) 743 TUK = Action::TUK_Reference; 744 else if (Tok.is(tok::l_brace) || (getLang().CPlusPlus && Tok.is(tok::colon))){ 745 if (DS.isFriendSpecified()) { 746 // C++ [class.friend]p2: 747 // A class shall not be defined in a friend declaration. 748 Diag(Tok.getLocation(), diag::err_friend_decl_defines_class) 749 << SourceRange(DS.getFriendSpecLoc()); 750 751 // Skip everything up to the semicolon, so that this looks like a proper 752 // friend class (or template thereof) declaration. 753 SkipUntil(tok::semi, true, true); 754 TUK = Action::TUK_Friend; 755 } else { 756 // Okay, this is a class definition. 757 TUK = Action::TUK_Definition; 758 } 759 } else if (Tok.is(tok::semi)) 760 TUK = DS.isFriendSpecified() ? Action::TUK_Friend : Action::TUK_Declaration; 761 else 762 TUK = Action::TUK_Reference; 763 764 if (!Name && !TemplateId && TUK != Action::TUK_Definition) { 765 // We have a declaration or reference to an anonymous class. 766 Diag(StartLoc, diag::err_anon_type_definition) 767 << DeclSpec::getSpecifierName(TagType); 768 769 SkipUntil(tok::comma, true); 770 771 if (TemplateId) 772 TemplateId->Destroy(); 773 return; 774 } 775 776 // Create the tag portion of the class or class template. 777 Action::DeclResult TagOrTempResult = true; // invalid 778 Action::TypeResult TypeResult = true; // invalid 779 780 // FIXME: When TUK == TUK_Reference and we have a template-id, we need 781 // to turn that template-id into a type. 782 783 bool Owned = false; 784 if (TemplateId) { 785 // Explicit specialization, class template partial specialization, 786 // or explicit instantiation. 787 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 788 TemplateId->getTemplateArgs(), 789 TemplateId->NumArgs); 790 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 791 TUK == Action::TUK_Declaration) { 792 // This is an explicit instantiation of a class template. 793 TagOrTempResult 794 = Actions.ActOnExplicitInstantiation(CurScope, 795 TemplateInfo.ExternLoc, 796 TemplateInfo.TemplateLoc, 797 TagType, 798 StartLoc, 799 SS, 800 TemplateTy::make(TemplateId->Template), 801 TemplateId->TemplateNameLoc, 802 TemplateId->LAngleLoc, 803 TemplateArgsPtr, 804 TemplateId->RAngleLoc, 805 AttrList); 806 } else if (TUK == Action::TUK_Reference) { 807 TypeResult 808 = Actions.ActOnTemplateIdType(TemplateTy::make(TemplateId->Template), 809 TemplateId->TemplateNameLoc, 810 TemplateId->LAngleLoc, 811 TemplateArgsPtr, 812 TemplateId->RAngleLoc); 813 814 TypeResult = Actions.ActOnTagTemplateIdType(TypeResult, TUK, 815 TagType, StartLoc); 816 } else { 817 // This is an explicit specialization or a class template 818 // partial specialization. 819 TemplateParameterLists FakedParamLists; 820 821 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 822 // This looks like an explicit instantiation, because we have 823 // something like 824 // 825 // template class Foo<X> 826 // 827 // but it actually has a definition. Most likely, this was 828 // meant to be an explicit specialization, but the user forgot 829 // the '<>' after 'template'. 830 assert(TUK == Action::TUK_Definition && "Expected a definition here"); 831 832 SourceLocation LAngleLoc 833 = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 834 Diag(TemplateId->TemplateNameLoc, 835 diag::err_explicit_instantiation_with_definition) 836 << SourceRange(TemplateInfo.TemplateLoc) 837 << CodeModificationHint::CreateInsertion(LAngleLoc, "<>"); 838 839 // Create a fake template parameter list that contains only 840 // "template<>", so that we treat this construct as a class 841 // template specialization. 842 FakedParamLists.push_back( 843 Actions.ActOnTemplateParameterList(0, SourceLocation(), 844 TemplateInfo.TemplateLoc, 845 LAngleLoc, 846 0, 0, 847 LAngleLoc)); 848 TemplateParams = &FakedParamLists; 849 } 850 851 // Build the class template specialization. 852 TagOrTempResult 853 = Actions.ActOnClassTemplateSpecialization(CurScope, TagType, TUK, 854 StartLoc, SS, 855 TemplateTy::make(TemplateId->Template), 856 TemplateId->TemplateNameLoc, 857 TemplateId->LAngleLoc, 858 TemplateArgsPtr, 859 TemplateId->RAngleLoc, 860 AttrList, 861 Action::MultiTemplateParamsArg(Actions, 862 TemplateParams? &(*TemplateParams)[0] : 0, 863 TemplateParams? TemplateParams->size() : 0)); 864 } 865 TemplateId->Destroy(); 866 } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 867 TUK == Action::TUK_Declaration) { 868 // Explicit instantiation of a member of a class template 869 // specialization, e.g., 870 // 871 // template struct Outer<int>::Inner; 872 // 873 TagOrTempResult 874 = Actions.ActOnExplicitInstantiation(CurScope, 875 TemplateInfo.ExternLoc, 876 TemplateInfo.TemplateLoc, 877 TagType, StartLoc, SS, Name, 878 NameLoc, AttrList); 879 } else { 880 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 881 TUK == Action::TUK_Definition) { 882 // FIXME: Diagnose this particular error. 883 } 884 885 bool IsDependent = false; 886 887 // Declaration or definition of a class type 888 TagOrTempResult = Actions.ActOnTag(CurScope, TagType, TUK, StartLoc, SS, 889 Name, NameLoc, AttrList, AS, 890 Action::MultiTemplateParamsArg(Actions, 891 TemplateParams? &(*TemplateParams)[0] : 0, 892 TemplateParams? TemplateParams->size() : 0), 893 Owned, IsDependent); 894 895 // If ActOnTag said the type was dependent, try again with the 896 // less common call. 897 if (IsDependent) 898 TypeResult = Actions.ActOnDependentTag(CurScope, TagType, TUK, 899 SS, Name, StartLoc, NameLoc); 900 } 901 902 // If there is a body, parse it and inform the actions module. 903 if (TUK == Action::TUK_Definition) { 904 assert(Tok.is(tok::l_brace) || 905 (getLang().CPlusPlus && Tok.is(tok::colon))); 906 if (getLang().CPlusPlus) 907 ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); 908 else 909 ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); 910 } 911 912 void *Result; 913 if (!TypeResult.isInvalid()) { 914 TagType = DeclSpec::TST_typename; 915 Result = TypeResult.get(); 916 Owned = false; 917 } else if (!TagOrTempResult.isInvalid()) { 918 Result = TagOrTempResult.get().getAs<void>(); 919 } else { 920 DS.SetTypeSpecError(); 921 return; 922 } 923 924 const char *PrevSpec = 0; 925 unsigned DiagID; 926 927 // FIXME: The DeclSpec should keep the locations of both the keyword and the 928 // name (if there is one). 929 SourceLocation TSTLoc = NameLoc.isValid()? NameLoc : StartLoc; 930 931 if (DS.SetTypeSpecType(TagType, TSTLoc, PrevSpec, DiagID, 932 Result, Owned)) 933 Diag(StartLoc, DiagID) << PrevSpec; 934 935 // At this point, we've successfully parsed a class-specifier in 'definition' 936 // form (e.g. "struct foo { int x; }". While we could just return here, we're 937 // going to look at what comes after it to improve error recovery. If an 938 // impossible token occurs next, we assume that the programmer forgot a ; at 939 // the end of the declaration and recover that way. 940 // 941 // This switch enumerates the valid "follow" set for definition. 942 if (TUK == Action::TUK_Definition) { 943 bool ExpectedSemi = true; 944 switch (Tok.getKind()) { 945 default: break; 946 case tok::semi: // struct foo {...} ; 947 case tok::star: // struct foo {...} * P; 948 case tok::amp: // struct foo {...} & R = ... 949 case tok::identifier: // struct foo {...} V ; 950 case tok::r_paren: //(struct foo {...} ) {4} 951 case tok::annot_cxxscope: // struct foo {...} a:: b; 952 case tok::annot_typename: // struct foo {...} a ::b; 953 case tok::annot_template_id: // struct foo {...} a<int> ::b; 954 case tok::l_paren: // struct foo {...} ( x); 955 case tok::comma: // __builtin_offsetof(struct foo{...} , 956 ExpectedSemi = false; 957 break; 958 // Type qualifiers 959 case tok::kw_const: // struct foo {...} const x; 960 case tok::kw_volatile: // struct foo {...} volatile x; 961 case tok::kw_restrict: // struct foo {...} restrict x; 962 case tok::kw_inline: // struct foo {...} inline foo() {}; 963 // Storage-class specifiers 964 case tok::kw_static: // struct foo {...} static x; 965 case tok::kw_extern: // struct foo {...} extern x; 966 case tok::kw_typedef: // struct foo {...} typedef x; 967 case tok::kw_register: // struct foo {...} register x; 968 case tok::kw_auto: // struct foo {...} auto x; 969 // As shown above, type qualifiers and storage class specifiers absolutely 970 // can occur after class specifiers according to the grammar. However, 971 // almost noone actually writes code like this. If we see one of these, 972 // it is much more likely that someone missed a semi colon and the 973 // type/storage class specifier we're seeing is part of the *next* 974 // intended declaration, as in: 975 // 976 // struct foo { ... } 977 // typedef int X; 978 // 979 // We'd really like to emit a missing semicolon error instead of emitting 980 // an error on the 'int' saying that you can't have two type specifiers in 981 // the same declaration of X. Because of this, we look ahead past this 982 // token to see if it's a type specifier. If so, we know the code is 983 // otherwise invalid, so we can produce the expected semi error. 984 if (!isKnownToBeTypeSpecifier(NextToken())) 985 ExpectedSemi = false; 986 break; 987 988 case tok::r_brace: // struct bar { struct foo {...} } 989 // Missing ';' at end of struct is accepted as an extension in C mode. 990 if (!getLang().CPlusPlus) 991 ExpectedSemi = false; 992 break; 993 } 994 995 if (ExpectedSemi) { 996 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl, 997 TagType == DeclSpec::TST_class ? "class" 998 : TagType == DeclSpec::TST_struct? "struct" : "union"); 999 // Push this token back into the preprocessor and change our current token 1000 // to ';' so that the rest of the code recovers as though there were an 1001 // ';' after the definition. 1002 PP.EnterToken(Tok); 1003 Tok.setKind(tok::semi); 1004 } 1005 } 1006} 1007 1008/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. 1009/// 1010/// base-clause : [C++ class.derived] 1011/// ':' base-specifier-list 1012/// base-specifier-list: 1013/// base-specifier '...'[opt] 1014/// base-specifier-list ',' base-specifier '...'[opt] 1015void Parser::ParseBaseClause(DeclPtrTy ClassDecl) { 1016 assert(Tok.is(tok::colon) && "Not a base clause"); 1017 ConsumeToken(); 1018 1019 // Build up an array of parsed base specifiers. 1020 llvm::SmallVector<BaseTy *, 8> BaseInfo; 1021 1022 while (true) { 1023 // Parse a base-specifier. 1024 BaseResult Result = ParseBaseSpecifier(ClassDecl); 1025 if (Result.isInvalid()) { 1026 // Skip the rest of this base specifier, up until the comma or 1027 // opening brace. 1028 SkipUntil(tok::comma, tok::l_brace, true, true); 1029 } else { 1030 // Add this to our array of base specifiers. 1031 BaseInfo.push_back(Result.get()); 1032 } 1033 1034 // If the next token is a comma, consume it and keep reading 1035 // base-specifiers. 1036 if (Tok.isNot(tok::comma)) break; 1037 1038 // Consume the comma. 1039 ConsumeToken(); 1040 } 1041 1042 // Attach the base specifiers 1043 Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size()); 1044} 1045 1046/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is 1047/// one entry in the base class list of a class specifier, for example: 1048/// class foo : public bar, virtual private baz { 1049/// 'public bar' and 'virtual private baz' are each base-specifiers. 1050/// 1051/// base-specifier: [C++ class.derived] 1052/// ::[opt] nested-name-specifier[opt] class-name 1053/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] 1054/// class-name 1055/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] 1056/// class-name 1057Parser::BaseResult Parser::ParseBaseSpecifier(DeclPtrTy ClassDecl) { 1058 bool IsVirtual = false; 1059 SourceLocation StartLoc = Tok.getLocation(); 1060 1061 // Parse the 'virtual' keyword. 1062 if (Tok.is(tok::kw_virtual)) { 1063 ConsumeToken(); 1064 IsVirtual = true; 1065 } 1066 1067 // Parse an (optional) access specifier. 1068 AccessSpecifier Access = getAccessSpecifierIfPresent(); 1069 if (Access != AS_none) 1070 ConsumeToken(); 1071 1072 // Parse the 'virtual' keyword (again!), in case it came after the 1073 // access specifier. 1074 if (Tok.is(tok::kw_virtual)) { 1075 SourceLocation VirtualLoc = ConsumeToken(); 1076 if (IsVirtual) { 1077 // Complain about duplicate 'virtual' 1078 Diag(VirtualLoc, diag::err_dup_virtual) 1079 << CodeModificationHint::CreateRemoval(VirtualLoc); 1080 } 1081 1082 IsVirtual = true; 1083 } 1084 1085 // Parse optional '::' and optional nested-name-specifier. 1086 CXXScopeSpec SS; 1087 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, 1088 /*EnteringContext=*/false); 1089 1090 // The location of the base class itself. 1091 SourceLocation BaseLoc = Tok.getLocation(); 1092 1093 // Parse the class-name. 1094 SourceLocation EndLocation; 1095 TypeResult BaseType = ParseClassName(EndLocation, &SS); 1096 if (BaseType.isInvalid()) 1097 return true; 1098 1099 // Find the complete source range for the base-specifier. 1100 SourceRange Range(StartLoc, EndLocation); 1101 1102 // Notify semantic analysis that we have parsed a complete 1103 // base-specifier. 1104 return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, 1105 BaseType.get(), BaseLoc); 1106} 1107 1108/// getAccessSpecifierIfPresent - Determine whether the next token is 1109/// a C++ access-specifier. 1110/// 1111/// access-specifier: [C++ class.derived] 1112/// 'private' 1113/// 'protected' 1114/// 'public' 1115AccessSpecifier Parser::getAccessSpecifierIfPresent() const { 1116 switch (Tok.getKind()) { 1117 default: return AS_none; 1118 case tok::kw_private: return AS_private; 1119 case tok::kw_protected: return AS_protected; 1120 case tok::kw_public: return AS_public; 1121 } 1122} 1123 1124void Parser::HandleMemberFunctionDefaultArgs(Declarator& DeclaratorInfo, 1125 DeclPtrTy ThisDecl) { 1126 // We just declared a member function. If this member function 1127 // has any default arguments, we'll need to parse them later. 1128 LateParsedMethodDeclaration *LateMethod = 0; 1129 DeclaratorChunk::FunctionTypeInfo &FTI 1130 = DeclaratorInfo.getTypeObject(0).Fun; 1131 for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { 1132 if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { 1133 if (!LateMethod) { 1134 // Push this method onto the stack of late-parsed method 1135 // declarations. 1136 getCurrentClass().MethodDecls.push_back( 1137 LateParsedMethodDeclaration(ThisDecl)); 1138 LateMethod = &getCurrentClass().MethodDecls.back(); 1139 LateMethod->TemplateScope = CurScope->isTemplateParamScope(); 1140 1141 // Add all of the parameters prior to this one (they don't 1142 // have default arguments). 1143 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 1144 for (unsigned I = 0; I < ParamIdx; ++I) 1145 LateMethod->DefaultArgs.push_back( 1146 LateParsedDefaultArgument(FTI.ArgInfo[I].Param)); 1147 } 1148 1149 // Add this parameter to the list of parameters (it or may 1150 // not have a default argument). 1151 LateMethod->DefaultArgs.push_back( 1152 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, 1153 FTI.ArgInfo[ParamIdx].DefaultArgTokens)); 1154 } 1155 } 1156} 1157 1158/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. 1159/// 1160/// member-declaration: 1161/// decl-specifier-seq[opt] member-declarator-list[opt] ';' 1162/// function-definition ';'[opt] 1163/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] 1164/// using-declaration [TODO] 1165/// [C++0x] static_assert-declaration 1166/// template-declaration 1167/// [GNU] '__extension__' member-declaration 1168/// 1169/// member-declarator-list: 1170/// member-declarator 1171/// member-declarator-list ',' member-declarator 1172/// 1173/// member-declarator: 1174/// declarator pure-specifier[opt] 1175/// declarator constant-initializer[opt] 1176/// identifier[opt] ':' constant-expression 1177/// 1178/// pure-specifier: 1179/// '= 0' 1180/// 1181/// constant-initializer: 1182/// '=' constant-expression 1183/// 1184void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS, 1185 const ParsedTemplateInfo &TemplateInfo) { 1186 // Access declarations. 1187 if (!TemplateInfo.Kind && 1188 (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 1189 !TryAnnotateCXXScopeToken() && 1190 Tok.is(tok::annot_cxxscope)) { 1191 bool isAccessDecl = false; 1192 if (NextToken().is(tok::identifier)) 1193 isAccessDecl = GetLookAheadToken(2).is(tok::semi); 1194 else 1195 isAccessDecl = NextToken().is(tok::kw_operator); 1196 1197 if (isAccessDecl) { 1198 // Collect the scope specifier token we annotated earlier. 1199 CXXScopeSpec SS; 1200 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType*/ 0, false); 1201 1202 // Try to parse an unqualified-id. 1203 UnqualifiedId Name; 1204 if (ParseUnqualifiedId(SS, false, true, true, /*ObjectType*/ 0, Name)) { 1205 SkipUntil(tok::semi); 1206 return; 1207 } 1208 1209 // TODO: recover from mistakenly-qualified operator declarations. 1210 if (ExpectAndConsume(tok::semi, 1211 diag::err_expected_semi_after, 1212 "access declaration", 1213 tok::semi)) 1214 return; 1215 1216 Actions.ActOnUsingDeclaration(CurScope, AS, 1217 false, SourceLocation(), 1218 SS, Name, 1219 /* AttrList */ 0, 1220 /* IsTypeName */ false, 1221 SourceLocation()); 1222 return; 1223 } 1224 } 1225 1226 // static_assert-declaration 1227 if (Tok.is(tok::kw_static_assert)) { 1228 // FIXME: Check for templates 1229 SourceLocation DeclEnd; 1230 ParseStaticAssertDeclaration(DeclEnd); 1231 return; 1232 } 1233 1234 if (Tok.is(tok::kw_template)) { 1235 assert(!TemplateInfo.TemplateParams && 1236 "Nested template improperly parsed?"); 1237 SourceLocation DeclEnd; 1238 ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd, 1239 AS); 1240 return; 1241 } 1242 1243 // Handle: member-declaration ::= '__extension__' member-declaration 1244 if (Tok.is(tok::kw___extension__)) { 1245 // __extension__ silences extension warnings in the subexpression. 1246 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1247 ConsumeToken(); 1248 return ParseCXXClassMemberDeclaration(AS, TemplateInfo); 1249 } 1250 1251 // Don't parse FOO:BAR as if it were a typo for FOO::BAR, in this context it 1252 // is a bitfield. 1253 ColonProtectionRAIIObject X(*this); 1254 1255 CXX0XAttributeList AttrList; 1256 // Optional C++0x attribute-specifier 1257 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) 1258 AttrList = ParseCXX0XAttributes(); 1259 1260 if (Tok.is(tok::kw_using)) { 1261 // FIXME: Check for template aliases 1262 1263 if (AttrList.HasAttr) 1264 Diag(AttrList.Range.getBegin(), diag::err_attributes_not_allowed) 1265 << AttrList.Range; 1266 1267 // Eat 'using'. 1268 SourceLocation UsingLoc = ConsumeToken(); 1269 1270 if (Tok.is(tok::kw_namespace)) { 1271 Diag(UsingLoc, diag::err_using_namespace_in_class); 1272 SkipUntil(tok::semi, true, true); 1273 } else { 1274 SourceLocation DeclEnd; 1275 // Otherwise, it must be using-declaration. 1276 ParseUsingDeclaration(Declarator::MemberContext, UsingLoc, DeclEnd, AS); 1277 } 1278 return; 1279 } 1280 1281 SourceLocation DSStart = Tok.getLocation(); 1282 // decl-specifier-seq: 1283 // Parse the common declaration-specifiers piece. 1284 ParsingDeclSpec DS(*this); 1285 DS.AddAttributes(AttrList.AttrList); 1286 ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class); 1287 1288 Action::MultiTemplateParamsArg TemplateParams(Actions, 1289 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0, 1290 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); 1291 1292 if (Tok.is(tok::semi)) { 1293 ConsumeToken(); 1294 Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 1295 return; 1296 } 1297 1298 ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); 1299 1300 if (Tok.isNot(tok::colon)) { 1301 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1302 ColonProtectionRAIIObject X(*this); 1303 1304 // Parse the first declarator. 1305 ParseDeclarator(DeclaratorInfo); 1306 // Error parsing the declarator? 1307 if (!DeclaratorInfo.hasName()) { 1308 // If so, skip until the semi-colon or a }. 1309 SkipUntil(tok::r_brace, true); 1310 if (Tok.is(tok::semi)) 1311 ConsumeToken(); 1312 return; 1313 } 1314 1315 // If attributes exist after the declarator, but before an '{', parse them. 1316 if (Tok.is(tok::kw___attribute)) { 1317 SourceLocation Loc; 1318 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1319 DeclaratorInfo.AddAttributes(AttrList, Loc); 1320 } 1321 1322 // function-definition: 1323 if (Tok.is(tok::l_brace) 1324 || (DeclaratorInfo.isFunctionDeclarator() && 1325 (Tok.is(tok::colon) || Tok.is(tok::kw_try)))) { 1326 if (!DeclaratorInfo.isFunctionDeclarator()) { 1327 Diag(Tok, diag::err_func_def_no_params); 1328 ConsumeBrace(); 1329 SkipUntil(tok::r_brace, true); 1330 return; 1331 } 1332 1333 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1334 Diag(Tok, diag::err_function_declared_typedef); 1335 // This recovery skips the entire function body. It would be nice 1336 // to simply call ParseCXXInlineMethodDef() below, however Sema 1337 // assumes the declarator represents a function, not a typedef. 1338 ConsumeBrace(); 1339 SkipUntil(tok::r_brace, true); 1340 return; 1341 } 1342 1343 ParseCXXInlineMethodDef(AS, DeclaratorInfo, TemplateInfo); 1344 return; 1345 } 1346 } 1347 1348 // member-declarator-list: 1349 // member-declarator 1350 // member-declarator-list ',' member-declarator 1351 1352 llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup; 1353 OwningExprResult BitfieldSize(Actions); 1354 OwningExprResult Init(Actions); 1355 bool Deleted = false; 1356 1357 while (1) { 1358 // member-declarator: 1359 // declarator pure-specifier[opt] 1360 // declarator constant-initializer[opt] 1361 // identifier[opt] ':' constant-expression 1362 1363 if (Tok.is(tok::colon)) { 1364 ConsumeToken(); 1365 BitfieldSize = ParseConstantExpression(); 1366 if (BitfieldSize.isInvalid()) 1367 SkipUntil(tok::comma, true, true); 1368 } 1369 1370 // pure-specifier: 1371 // '= 0' 1372 // 1373 // constant-initializer: 1374 // '=' constant-expression 1375 // 1376 // defaulted/deleted function-definition: 1377 // '=' 'default' [TODO] 1378 // '=' 'delete' 1379 1380 if (Tok.is(tok::equal)) { 1381 ConsumeToken(); 1382 if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) { 1383 ConsumeToken(); 1384 Deleted = true; 1385 } else { 1386 Init = ParseInitializer(); 1387 if (Init.isInvalid()) 1388 SkipUntil(tok::comma, true, true); 1389 } 1390 } 1391 1392 // If attributes exist after the declarator, parse them. 1393 if (Tok.is(tok::kw___attribute)) { 1394 SourceLocation Loc; 1395 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1396 DeclaratorInfo.AddAttributes(AttrList, Loc); 1397 } 1398 1399 // NOTE: If Sema is the Action module and declarator is an instance field, 1400 // this call will *not* return the created decl; It will return null. 1401 // See Sema::ActOnCXXMemberDeclarator for details. 1402 1403 DeclPtrTy ThisDecl; 1404 if (DS.isFriendSpecified()) { 1405 // TODO: handle initializers, bitfields, 'delete' 1406 ThisDecl = Actions.ActOnFriendFunctionDecl(CurScope, DeclaratorInfo, 1407 /*IsDefinition*/ false, 1408 move(TemplateParams)); 1409 } else { 1410 ThisDecl = Actions.ActOnCXXMemberDeclarator(CurScope, AS, 1411 DeclaratorInfo, 1412 move(TemplateParams), 1413 BitfieldSize.release(), 1414 Init.release(), 1415 /*IsDefinition*/Deleted, 1416 Deleted); 1417 } 1418 if (ThisDecl) 1419 DeclsInGroup.push_back(ThisDecl); 1420 1421 if (DeclaratorInfo.isFunctionDeclarator() && 1422 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 1423 != DeclSpec::SCS_typedef) { 1424 HandleMemberFunctionDefaultArgs(DeclaratorInfo, ThisDecl); 1425 } 1426 1427 DeclaratorInfo.complete(ThisDecl); 1428 1429 // If we don't have a comma, it is either the end of the list (a ';') 1430 // or an error, bail out. 1431 if (Tok.isNot(tok::comma)) 1432 break; 1433 1434 // Consume the comma. 1435 ConsumeToken(); 1436 1437 // Parse the next declarator. 1438 DeclaratorInfo.clear(); 1439 BitfieldSize = 0; 1440 Init = 0; 1441 Deleted = false; 1442 1443 // Attributes are only allowed on the second declarator. 1444 if (Tok.is(tok::kw___attribute)) { 1445 SourceLocation Loc; 1446 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1447 DeclaratorInfo.AddAttributes(AttrList, Loc); 1448 } 1449 1450 if (Tok.isNot(tok::colon)) 1451 ParseDeclarator(DeclaratorInfo); 1452 } 1453 1454 if (ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) { 1455 // Skip to end of block or statement. 1456 SkipUntil(tok::r_brace, true, true); 1457 // If we stopped at a ';', eat it. 1458 if (Tok.is(tok::semi)) ConsumeToken(); 1459 return; 1460 } 1461 1462 Actions.FinalizeDeclaratorGroup(CurScope, DS, DeclsInGroup.data(), 1463 DeclsInGroup.size()); 1464} 1465 1466/// ParseCXXMemberSpecification - Parse the class definition. 1467/// 1468/// member-specification: 1469/// member-declaration member-specification[opt] 1470/// access-specifier ':' member-specification[opt] 1471/// 1472void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, 1473 unsigned TagType, DeclPtrTy TagDecl) { 1474 assert((TagType == DeclSpec::TST_struct || 1475 TagType == DeclSpec::TST_union || 1476 TagType == DeclSpec::TST_class) && "Invalid TagType!"); 1477 1478 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, 1479 PP.getSourceManager(), 1480 "parsing struct/union/class body"); 1481 1482 // Determine whether this is a non-nested class. Note that local 1483 // classes are *not* considered to be nested classes. 1484 bool NonNestedClass = true; 1485 if (!ClassStack.empty()) { 1486 for (const Scope *S = CurScope; S; S = S->getParent()) { 1487 if (S->isClassScope()) { 1488 // We're inside a class scope, so this is a nested class. 1489 NonNestedClass = false; 1490 break; 1491 } 1492 1493 if ((S->getFlags() & Scope::FnScope)) { 1494 // If we're in a function or function template declared in the 1495 // body of a class, then this is a local class rather than a 1496 // nested class. 1497 const Scope *Parent = S->getParent(); 1498 if (Parent->isTemplateParamScope()) 1499 Parent = Parent->getParent(); 1500 if (Parent->isClassScope()) 1501 break; 1502 } 1503 } 1504 } 1505 1506 // Enter a scope for the class. 1507 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); 1508 1509 // Note that we are parsing a new (potentially-nested) class definition. 1510 ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass); 1511 1512 if (TagDecl) 1513 Actions.ActOnTagStartDefinition(CurScope, TagDecl); 1514 1515 if (Tok.is(tok::colon)) { 1516 ParseBaseClause(TagDecl); 1517 1518 if (!Tok.is(tok::l_brace)) { 1519 Diag(Tok, diag::err_expected_lbrace_after_base_specifiers); 1520 return; 1521 } 1522 } 1523 1524 assert(Tok.is(tok::l_brace)); 1525 1526 SourceLocation LBraceLoc = ConsumeBrace(); 1527 1528 if (!TagDecl) { 1529 SkipUntil(tok::r_brace, false, false); 1530 return; 1531 } 1532 1533 Actions.ActOnStartCXXMemberDeclarations(CurScope, TagDecl, LBraceLoc); 1534 1535 // C++ 11p3: Members of a class defined with the keyword class are private 1536 // by default. Members of a class defined with the keywords struct or union 1537 // are public by default. 1538 AccessSpecifier CurAS; 1539 if (TagType == DeclSpec::TST_class) 1540 CurAS = AS_private; 1541 else 1542 CurAS = AS_public; 1543 1544 // While we still have something to read, read the member-declarations. 1545 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1546 // Each iteration of this loop reads one member-declaration. 1547 1548 // Check for extraneous top-level semicolon. 1549 if (Tok.is(tok::semi)) { 1550 Diag(Tok, diag::ext_extra_struct_semi) 1551 << CodeModificationHint::CreateRemoval(Tok.getLocation()); 1552 ConsumeToken(); 1553 continue; 1554 } 1555 1556 AccessSpecifier AS = getAccessSpecifierIfPresent(); 1557 if (AS != AS_none) { 1558 // Current token is a C++ access specifier. 1559 CurAS = AS; 1560 ConsumeToken(); 1561 ExpectAndConsume(tok::colon, diag::err_expected_colon); 1562 continue; 1563 } 1564 1565 // FIXME: Make sure we don't have a template here. 1566 1567 // Parse all the comma separated declarators. 1568 ParseCXXClassMemberDeclaration(CurAS); 1569 } 1570 1571 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1572 1573 // If attributes exist after class contents, parse them. 1574 llvm::OwningPtr<AttributeList> AttrList; 1575 if (Tok.is(tok::kw___attribute)) 1576 AttrList.reset(ParseGNUAttributes()); // FIXME: where should I put them? 1577 1578 Actions.ActOnFinishCXXMemberSpecification(CurScope, RecordLoc, TagDecl, 1579 LBraceLoc, RBraceLoc); 1580 1581 // C++ 9.2p2: Within the class member-specification, the class is regarded as 1582 // complete within function bodies, default arguments, 1583 // exception-specifications, and constructor ctor-initializers (including 1584 // such things in nested classes). 1585 // 1586 // FIXME: Only function bodies and constructor ctor-initializers are 1587 // parsed correctly, fix the rest. 1588 if (NonNestedClass) { 1589 // We are not inside a nested class. This class and its nested classes 1590 // are complete and we can parse the delayed portions of method 1591 // declarations and the lexed inline method definitions. 1592 ParseLexedMethodDeclarations(getCurrentClass()); 1593 ParseLexedMethodDefs(getCurrentClass()); 1594 } 1595 1596 // Leave the class scope. 1597 ParsingDef.Pop(); 1598 ClassScope.Exit(); 1599 1600 Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc); 1601} 1602 1603/// ParseConstructorInitializer - Parse a C++ constructor initializer, 1604/// which explicitly initializes the members or base classes of a 1605/// class (C++ [class.base.init]). For example, the three initializers 1606/// after the ':' in the Derived constructor below: 1607/// 1608/// @code 1609/// class Base { }; 1610/// class Derived : Base { 1611/// int x; 1612/// float f; 1613/// public: 1614/// Derived(float f) : Base(), x(17), f(f) { } 1615/// }; 1616/// @endcode 1617/// 1618/// [C++] ctor-initializer: 1619/// ':' mem-initializer-list 1620/// 1621/// [C++] mem-initializer-list: 1622/// mem-initializer 1623/// mem-initializer , mem-initializer-list 1624void Parser::ParseConstructorInitializer(DeclPtrTy ConstructorDecl) { 1625 assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); 1626 1627 SourceLocation ColonLoc = ConsumeToken(); 1628 1629 llvm::SmallVector<MemInitTy*, 4> MemInitializers; 1630 bool AnyErrors = false; 1631 1632 do { 1633 MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); 1634 if (!MemInit.isInvalid()) 1635 MemInitializers.push_back(MemInit.get()); 1636 else 1637 AnyErrors = true; 1638 1639 if (Tok.is(tok::comma)) 1640 ConsumeToken(); 1641 else if (Tok.is(tok::l_brace)) 1642 break; 1643 else { 1644 // Skip over garbage, until we get to '{'. Don't eat the '{'. 1645 Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); 1646 SkipUntil(tok::l_brace, true, true); 1647 break; 1648 } 1649 } while (true); 1650 1651 Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, 1652 MemInitializers.data(), MemInitializers.size(), 1653 AnyErrors); 1654} 1655 1656/// ParseMemInitializer - Parse a C++ member initializer, which is 1657/// part of a constructor initializer that explicitly initializes one 1658/// member or base class (C++ [class.base.init]). See 1659/// ParseConstructorInitializer for an example. 1660/// 1661/// [C++] mem-initializer: 1662/// mem-initializer-id '(' expression-list[opt] ')' 1663/// 1664/// [C++] mem-initializer-id: 1665/// '::'[opt] nested-name-specifier[opt] class-name 1666/// identifier 1667Parser::MemInitResult Parser::ParseMemInitializer(DeclPtrTy ConstructorDecl) { 1668 // parse '::'[opt] nested-name-specifier[opt] 1669 CXXScopeSpec SS; 1670 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 1671 TypeTy *TemplateTypeTy = 0; 1672 if (Tok.is(tok::annot_template_id)) { 1673 TemplateIdAnnotation *TemplateId 1674 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1675 if (TemplateId->Kind == TNK_Type_template || 1676 TemplateId->Kind == TNK_Dependent_template_name) { 1677 AnnotateTemplateIdTokenAsType(&SS); 1678 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 1679 TemplateTypeTy = Tok.getAnnotationValue(); 1680 } 1681 } 1682 if (!TemplateTypeTy && Tok.isNot(tok::identifier)) { 1683 Diag(Tok, diag::err_expected_member_or_base_name); 1684 return true; 1685 } 1686 1687 // Get the identifier. This may be a member name or a class name, 1688 // but we'll let the semantic analysis determine which it is. 1689 IdentifierInfo *II = Tok.is(tok::identifier) ? Tok.getIdentifierInfo() : 0; 1690 SourceLocation IdLoc = ConsumeToken(); 1691 1692 // Parse the '('. 1693 if (Tok.isNot(tok::l_paren)) { 1694 Diag(Tok, diag::err_expected_lparen); 1695 return true; 1696 } 1697 SourceLocation LParenLoc = ConsumeParen(); 1698 1699 // Parse the optional expression-list. 1700 ExprVector ArgExprs(Actions); 1701 CommaLocsTy CommaLocs; 1702 if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { 1703 SkipUntil(tok::r_paren); 1704 return true; 1705 } 1706 1707 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1708 1709 return Actions.ActOnMemInitializer(ConstructorDecl, CurScope, SS, II, 1710 TemplateTypeTy, IdLoc, 1711 LParenLoc, ArgExprs.take(), 1712 ArgExprs.size(), CommaLocs.data(), 1713 RParenLoc); 1714} 1715 1716/// ParseExceptionSpecification - Parse a C++ exception-specification 1717/// (C++ [except.spec]). 1718/// 1719/// exception-specification: 1720/// 'throw' '(' type-id-list [opt] ')' 1721/// [MS] 'throw' '(' '...' ')' 1722/// 1723/// type-id-list: 1724/// type-id 1725/// type-id-list ',' type-id 1726/// 1727bool Parser::ParseExceptionSpecification(SourceLocation &EndLoc, 1728 llvm::SmallVector<TypeTy*, 2> 1729 &Exceptions, 1730 llvm::SmallVector<SourceRange, 2> 1731 &Ranges, 1732 bool &hasAnyExceptionSpec) { 1733 assert(Tok.is(tok::kw_throw) && "expected throw"); 1734 1735 SourceLocation ThrowLoc = ConsumeToken(); 1736 1737 if (!Tok.is(tok::l_paren)) { 1738 return Diag(Tok, diag::err_expected_lparen_after) << "throw"; 1739 } 1740 SourceLocation LParenLoc = ConsumeParen(); 1741 1742 // Parse throw(...), a Microsoft extension that means "this function 1743 // can throw anything". 1744 if (Tok.is(tok::ellipsis)) { 1745 hasAnyExceptionSpec = true; 1746 SourceLocation EllipsisLoc = ConsumeToken(); 1747 if (!getLang().Microsoft) 1748 Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); 1749 EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1750 return false; 1751 } 1752 1753 // Parse the sequence of type-ids. 1754 SourceRange Range; 1755 while (Tok.isNot(tok::r_paren)) { 1756 TypeResult Res(ParseTypeName(&Range)); 1757 if (!Res.isInvalid()) { 1758 Exceptions.push_back(Res.get()); 1759 Ranges.push_back(Range); 1760 } 1761 if (Tok.is(tok::comma)) 1762 ConsumeToken(); 1763 else 1764 break; 1765 } 1766 1767 EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1768 return false; 1769} 1770 1771/// \brief We have just started parsing the definition of a new class, 1772/// so push that class onto our stack of classes that is currently 1773/// being parsed. 1774void Parser::PushParsingClass(DeclPtrTy ClassDecl, bool NonNestedClass) { 1775 assert((NonNestedClass || !ClassStack.empty()) && 1776 "Nested class without outer class"); 1777 ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass)); 1778} 1779 1780/// \brief Deallocate the given parsed class and all of its nested 1781/// classes. 1782void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { 1783 for (unsigned I = 0, N = Class->NestedClasses.size(); I != N; ++I) 1784 DeallocateParsedClasses(Class->NestedClasses[I]); 1785 delete Class; 1786} 1787 1788/// \brief Pop the top class of the stack of classes that are 1789/// currently being parsed. 1790/// 1791/// This routine should be called when we have finished parsing the 1792/// definition of a class, but have not yet popped the Scope 1793/// associated with the class's definition. 1794/// 1795/// \returns true if the class we've popped is a top-level class, 1796/// false otherwise. 1797void Parser::PopParsingClass() { 1798 assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); 1799 1800 ParsingClass *Victim = ClassStack.top(); 1801 ClassStack.pop(); 1802 if (Victim->TopLevelClass) { 1803 // Deallocate all of the nested classes of this class, 1804 // recursively: we don't need to keep any of this information. 1805 DeallocateParsedClasses(Victim); 1806 return; 1807 } 1808 assert(!ClassStack.empty() && "Missing top-level class?"); 1809 1810 if (Victim->MethodDecls.empty() && Victim->MethodDefs.empty() && 1811 Victim->NestedClasses.empty()) { 1812 // The victim is a nested class, but we will not need to perform 1813 // any processing after the definition of this class since it has 1814 // no members whose handling was delayed. Therefore, we can just 1815 // remove this nested class. 1816 delete Victim; 1817 return; 1818 } 1819 1820 // This nested class has some members that will need to be processed 1821 // after the top-level class is completely defined. Therefore, add 1822 // it to the list of nested classes within its parent. 1823 assert(CurScope->isClassScope() && "Nested class outside of class scope?"); 1824 ClassStack.top()->NestedClasses.push_back(Victim); 1825 Victim->TemplateScope = CurScope->getParent()->isTemplateParamScope(); 1826} 1827 1828/// ParseCXX0XAttributes - Parse a C++0x attribute-specifier. Currently only 1829/// parses standard attributes. 1830/// 1831/// [C++0x] attribute-specifier: 1832/// '[' '[' attribute-list ']' ']' 1833/// 1834/// [C++0x] attribute-list: 1835/// attribute[opt] 1836/// attribute-list ',' attribute[opt] 1837/// 1838/// [C++0x] attribute: 1839/// attribute-token attribute-argument-clause[opt] 1840/// 1841/// [C++0x] attribute-token: 1842/// identifier 1843/// attribute-scoped-token 1844/// 1845/// [C++0x] attribute-scoped-token: 1846/// attribute-namespace '::' identifier 1847/// 1848/// [C++0x] attribute-namespace: 1849/// identifier 1850/// 1851/// [C++0x] attribute-argument-clause: 1852/// '(' balanced-token-seq ')' 1853/// 1854/// [C++0x] balanced-token-seq: 1855/// balanced-token 1856/// balanced-token-seq balanced-token 1857/// 1858/// [C++0x] balanced-token: 1859/// '(' balanced-token-seq ')' 1860/// '[' balanced-token-seq ']' 1861/// '{' balanced-token-seq '}' 1862/// any token but '(', ')', '[', ']', '{', or '}' 1863CXX0XAttributeList Parser::ParseCXX0XAttributes(SourceLocation *EndLoc) { 1864 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) 1865 && "Not a C++0x attribute list"); 1866 1867 SourceLocation StartLoc = Tok.getLocation(), Loc; 1868 AttributeList *CurrAttr = 0; 1869 1870 ConsumeBracket(); 1871 ConsumeBracket(); 1872 1873 if (Tok.is(tok::comma)) { 1874 Diag(Tok.getLocation(), diag::err_expected_ident); 1875 ConsumeToken(); 1876 } 1877 1878 while (Tok.is(tok::identifier) || Tok.is(tok::comma)) { 1879 // attribute not present 1880 if (Tok.is(tok::comma)) { 1881 ConsumeToken(); 1882 continue; 1883 } 1884 1885 IdentifierInfo *ScopeName = 0, *AttrName = Tok.getIdentifierInfo(); 1886 SourceLocation ScopeLoc, AttrLoc = ConsumeToken(); 1887 1888 // scoped attribute 1889 if (Tok.is(tok::coloncolon)) { 1890 ConsumeToken(); 1891 1892 if (!Tok.is(tok::identifier)) { 1893 Diag(Tok.getLocation(), diag::err_expected_ident); 1894 SkipUntil(tok::r_square, tok::comma, true, true); 1895 continue; 1896 } 1897 1898 ScopeName = AttrName; 1899 ScopeLoc = AttrLoc; 1900 1901 AttrName = Tok.getIdentifierInfo(); 1902 AttrLoc = ConsumeToken(); 1903 } 1904 1905 bool AttrParsed = false; 1906 // No scoped names are supported; ideally we could put all non-standard 1907 // attributes into namespaces. 1908 if (!ScopeName) { 1909 switch(AttributeList::getKind(AttrName)) 1910 { 1911 // No arguments 1912 case AttributeList::AT_base_check: 1913 case AttributeList::AT_carries_dependency: 1914 case AttributeList::AT_final: 1915 case AttributeList::AT_hiding: 1916 case AttributeList::AT_noreturn: 1917 case AttributeList::AT_override: { 1918 if (Tok.is(tok::l_paren)) { 1919 Diag(Tok.getLocation(), diag::err_cxx0x_attribute_forbids_arguments) 1920 << AttrName->getName(); 1921 break; 1922 } 1923 1924 CurrAttr = new AttributeList(AttrName, AttrLoc, 0, AttrLoc, 0, 1925 SourceLocation(), 0, 0, CurrAttr, false, 1926 true); 1927 AttrParsed = true; 1928 break; 1929 } 1930 1931 // One argument; must be a type-id or assignment-expression 1932 case AttributeList::AT_aligned: { 1933 if (Tok.isNot(tok::l_paren)) { 1934 Diag(Tok.getLocation(), diag::err_cxx0x_attribute_requires_arguments) 1935 << AttrName->getName(); 1936 break; 1937 } 1938 SourceLocation ParamLoc = ConsumeParen(); 1939 1940 OwningExprResult ArgExpr = ParseCXX0XAlignArgument(ParamLoc); 1941 1942 MatchRHSPunctuation(tok::r_paren, ParamLoc); 1943 1944 ExprVector ArgExprs(Actions); 1945 ArgExprs.push_back(ArgExpr.release()); 1946 CurrAttr = new AttributeList(AttrName, AttrLoc, 0, AttrLoc, 1947 0, ParamLoc, ArgExprs.take(), 1, CurrAttr, 1948 false, true); 1949 1950 AttrParsed = true; 1951 break; 1952 } 1953 1954 // Silence warnings 1955 default: break; 1956 } 1957 } 1958 1959 // Skip the entire parameter clause, if any 1960 if (!AttrParsed && Tok.is(tok::l_paren)) { 1961 ConsumeParen(); 1962 // SkipUntil maintains the balancedness of tokens. 1963 SkipUntil(tok::r_paren, false); 1964 } 1965 } 1966 1967 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 1968 SkipUntil(tok::r_square, false); 1969 Loc = Tok.getLocation(); 1970 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 1971 SkipUntil(tok::r_square, false); 1972 1973 CXX0XAttributeList Attr (CurrAttr, SourceRange(StartLoc, Loc), true); 1974 return Attr; 1975} 1976 1977/// ParseCXX0XAlignArgument - Parse the argument to C++0x's [[align]] 1978/// attribute. 1979/// 1980/// FIXME: Simply returns an alignof() expression if the argument is a 1981/// type. Ideally, the type should be propagated directly into Sema. 1982/// 1983/// [C++0x] 'align' '(' type-id ')' 1984/// [C++0x] 'align' '(' assignment-expression ')' 1985Parser::OwningExprResult Parser::ParseCXX0XAlignArgument(SourceLocation Start) { 1986 if (isTypeIdInParens()) { 1987 EnterExpressionEvaluationContext Unevaluated(Actions, 1988 Action::Unevaluated); 1989 SourceLocation TypeLoc = Tok.getLocation(); 1990 TypeTy *Ty = ParseTypeName().get(); 1991 SourceRange TypeRange(Start, Tok.getLocation()); 1992 return Actions.ActOnSizeOfAlignOfExpr(TypeLoc, false, true, Ty, 1993 TypeRange); 1994 } else 1995 return ParseConstantExpression(); 1996} 1997