ParseDeclCXX.cpp revision 26997fd58c9560584edd154618f2f2c15ee68af4
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 Action::AttrTy *AttrList = 0; 68 if (Tok.is(tok::kw___attribute)) { 69 attrTok = Tok; 70 71 // FIXME: save these somewhere. 72 AttrList = 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 96 PrettyStackTraceActionsDecl CrashInfo(NamespcDecl, NamespaceLoc, Actions, 97 PP.getSourceManager(), 98 "parsing namespace"); 99 100 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 101 CXX0XAttributeList Attr; 102 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) 103 Attr = ParseCXX0XAttributes(); 104 ParseExternalDeclaration(Attr); 105 } 106 107 // Leave the namespace scope. 108 NamespaceScope.Exit(); 109 110 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBrace); 111 Actions.ActOnFinishNamespaceDef(NamespcDecl, RBraceLoc); 112 113 DeclEnd = RBraceLoc; 114 return NamespcDecl; 115} 116 117/// ParseNamespaceAlias - Parse the part after the '=' in a namespace 118/// alias definition. 119/// 120Parser::DeclPtrTy Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc, 121 SourceLocation AliasLoc, 122 IdentifierInfo *Alias, 123 SourceLocation &DeclEnd) { 124 assert(Tok.is(tok::equal) && "Not equal token"); 125 126 ConsumeToken(); // eat the '='. 127 128 if (Tok.is(tok::code_completion)) { 129 Actions.CodeCompleteNamespaceAliasDecl(CurScope); 130 ConsumeToken(); 131 } 132 133 CXXScopeSpec SS; 134 // Parse (optional) nested-name-specifier. 135 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 136 137 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 138 Diag(Tok, diag::err_expected_namespace_name); 139 // Skip to end of the definition and eat the ';'. 140 SkipUntil(tok::semi); 141 return DeclPtrTy(); 142 } 143 144 // Parse identifier. 145 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 146 SourceLocation IdentLoc = ConsumeToken(); 147 148 // Eat the ';'. 149 DeclEnd = Tok.getLocation(); 150 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name, 151 "", tok::semi); 152 153 return Actions.ActOnNamespaceAliasDef(CurScope, NamespaceLoc, AliasLoc, Alias, 154 SS, IdentLoc, Ident); 155} 156 157/// ParseLinkage - We know that the current token is a string_literal 158/// and just before that, that extern was seen. 159/// 160/// linkage-specification: [C++ 7.5p2: dcl.link] 161/// 'extern' string-literal '{' declaration-seq[opt] '}' 162/// 'extern' string-literal declaration 163/// 164Parser::DeclPtrTy Parser::ParseLinkage(ParsingDeclSpec &DS, 165 unsigned Context) { 166 assert(Tok.is(tok::string_literal) && "Not a string literal!"); 167 llvm::SmallVector<char, 8> LangBuffer; 168 // LangBuffer is guaranteed to be big enough. 169 LangBuffer.resize(Tok.getLength()); 170 const char *LangBufPtr = &LangBuffer[0]; 171 unsigned StrSize = PP.getSpelling(Tok, LangBufPtr); 172 173 SourceLocation Loc = ConsumeStringToken(); 174 175 ParseScope LinkageScope(this, Scope::DeclScope); 176 DeclPtrTy LinkageSpec 177 = Actions.ActOnStartLinkageSpecification(CurScope, 178 /*FIXME: */SourceLocation(), 179 Loc, LangBufPtr, StrSize, 180 Tok.is(tok::l_brace)? Tok.getLocation() 181 : SourceLocation()); 182 183 CXX0XAttributeList Attr; 184 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) { 185 Attr = ParseCXX0XAttributes(); 186 } 187 188 if (Tok.isNot(tok::l_brace)) { 189 ParseDeclarationOrFunctionDefinition(DS, Attr.AttrList); 190 return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, 191 SourceLocation()); 192 } 193 194 if (Attr.HasAttr) 195 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 196 << Attr.Range; 197 198 SourceLocation LBrace = ConsumeBrace(); 199 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 200 CXX0XAttributeList Attr; 201 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) 202 Attr = ParseCXX0XAttributes(); 203 ParseExternalDeclaration(Attr); 204 } 205 206 SourceLocation RBrace = MatchRHSPunctuation(tok::r_brace, LBrace); 207 return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, RBrace); 208} 209 210/// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or 211/// using-directive. Assumes that current token is 'using'. 212Parser::DeclPtrTy Parser::ParseUsingDirectiveOrDeclaration(unsigned Context, 213 SourceLocation &DeclEnd, 214 CXX0XAttributeList Attr) { 215 assert(Tok.is(tok::kw_using) && "Not using token"); 216 217 // Eat 'using'. 218 SourceLocation UsingLoc = ConsumeToken(); 219 220 if (Tok.is(tok::code_completion)) { 221 Actions.CodeCompleteUsing(CurScope); 222 ConsumeToken(); 223 } 224 225 if (Tok.is(tok::kw_namespace)) 226 // Next token after 'using' is 'namespace' so it must be using-directive 227 return ParseUsingDirective(Context, UsingLoc, DeclEnd, Attr.AttrList); 228 229 if (Attr.HasAttr) 230 Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) 231 << Attr.Range; 232 233 // Otherwise, it must be using-declaration. 234 // Ignore illegal attributes (the caller should already have issued an error. 235 return ParseUsingDeclaration(Context, UsingLoc, DeclEnd); 236} 237 238/// ParseUsingDirective - Parse C++ using-directive, assumes 239/// that current token is 'namespace' and 'using' was already parsed. 240/// 241/// using-directive: [C++ 7.3.p4: namespace.udir] 242/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 243/// namespace-name ; 244/// [GNU] using-directive: 245/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 246/// namespace-name attributes[opt] ; 247/// 248Parser::DeclPtrTy Parser::ParseUsingDirective(unsigned Context, 249 SourceLocation UsingLoc, 250 SourceLocation &DeclEnd, 251 AttributeList *Attr) { 252 assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token"); 253 254 // Eat 'namespace'. 255 SourceLocation NamespcLoc = ConsumeToken(); 256 257 if (Tok.is(tok::code_completion)) { 258 Actions.CodeCompleteUsingDirective(CurScope); 259 ConsumeToken(); 260 } 261 262 CXXScopeSpec SS; 263 // Parse (optional) nested-name-specifier. 264 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 265 266 IdentifierInfo *NamespcName = 0; 267 SourceLocation IdentLoc = SourceLocation(); 268 269 // Parse namespace-name. 270 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 271 Diag(Tok, diag::err_expected_namespace_name); 272 // If there was invalid namespace name, skip to end of decl, and eat ';'. 273 SkipUntil(tok::semi); 274 // FIXME: Are there cases, when we would like to call ActOnUsingDirective? 275 return DeclPtrTy(); 276 } 277 278 // Parse identifier. 279 NamespcName = Tok.getIdentifierInfo(); 280 IdentLoc = ConsumeToken(); 281 282 // Parse (optional) attributes (most likely GNU strong-using extension). 283 bool GNUAttr = false; 284 if (Tok.is(tok::kw___attribute)) { 285 GNUAttr = true; 286 Attr = addAttributeLists(Attr, ParseGNUAttributes()); 287 } 288 289 // Eat ';'. 290 DeclEnd = Tok.getLocation(); 291 ExpectAndConsume(tok::semi, 292 GNUAttr ? diag::err_expected_semi_after_attribute_list : 293 diag::err_expected_semi_after_namespace_name, "", tok::semi); 294 295 return Actions.ActOnUsingDirective(CurScope, UsingLoc, NamespcLoc, SS, 296 IdentLoc, NamespcName, Attr); 297} 298 299/// ParseUsingDeclaration - Parse C++ using-declaration. Assumes that 300/// 'using' was already seen. 301/// 302/// using-declaration: [C++ 7.3.p3: namespace.udecl] 303/// 'using' 'typename'[opt] ::[opt] nested-name-specifier 304/// unqualified-id 305/// 'using' :: unqualified-id 306/// 307Parser::DeclPtrTy Parser::ParseUsingDeclaration(unsigned Context, 308 SourceLocation UsingLoc, 309 SourceLocation &DeclEnd, 310 AccessSpecifier AS) { 311 CXXScopeSpec SS; 312 SourceLocation TypenameLoc; 313 bool IsTypeName; 314 315 // Ignore optional 'typename'. 316 // FIXME: This is wrong; we should parse this as a typename-specifier. 317 if (Tok.is(tok::kw_typename)) { 318 TypenameLoc = Tok.getLocation(); 319 ConsumeToken(); 320 IsTypeName = true; 321 } 322 else 323 IsTypeName = false; 324 325 // Parse nested-name-specifier. 326 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 327 328 AttributeList *AttrList = 0; 329 330 // Check nested-name specifier. 331 if (SS.isInvalid()) { 332 SkipUntil(tok::semi); 333 return DeclPtrTy(); 334 } 335 336 // Parse the unqualified-id. We allow parsing of both constructor and 337 // destructor names and allow the action module to diagnose any semantic 338 // errors. 339 UnqualifiedId Name; 340 if (ParseUnqualifiedId(SS, 341 /*EnteringContext=*/false, 342 /*AllowDestructorName=*/true, 343 /*AllowConstructorName=*/true, 344 /*ObjectType=*/0, 345 Name)) { 346 SkipUntil(tok::semi); 347 return DeclPtrTy(); 348 } 349 350 // Parse (optional) attributes (most likely GNU strong-using extension). 351 if (Tok.is(tok::kw___attribute)) 352 AttrList = 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, 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 bool DestrExpected) { 467 // Check whether we have a template-id that names a type. 468 if (Tok.is(tok::annot_template_id)) { 469 TemplateIdAnnotation *TemplateId 470 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 471 if (TemplateId->Kind == TNK_Type_template || 472 TemplateId->Kind == TNK_Dependent_template_name) { 473 AnnotateTemplateIdTokenAsType(SS); 474 475 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 476 TypeTy *Type = Tok.getAnnotationValue(); 477 EndLocation = Tok.getAnnotationEndLoc(); 478 ConsumeToken(); 479 480 if (Type) 481 return Type; 482 return true; 483 } 484 485 // Fall through to produce an error below. 486 } 487 488 if (Tok.isNot(tok::identifier)) { 489 Diag(Tok, diag::err_expected_class_name); 490 return true; 491 } 492 493 IdentifierInfo *Id = Tok.getIdentifierInfo(); 494 SourceLocation IdLoc = ConsumeToken(); 495 496 if (Tok.is(tok::less)) { 497 // It looks the user intended to write a template-id here, but the 498 // template-name was wrong. Try to fix that. 499 TemplateNameKind TNK = TNK_Type_template; 500 TemplateTy Template; 501 if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, CurScope, 502 SS, Template, TNK)) { 503 Diag(IdLoc, diag::err_unknown_template_name) 504 << Id; 505 } 506 507 if (!Template) 508 return true; 509 510 // Form the template name 511 UnqualifiedId TemplateName; 512 TemplateName.setIdentifier(Id, IdLoc); 513 514 // Parse the full template-id, then turn it into a type. 515 if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateName, 516 SourceLocation(), true)) 517 return true; 518 if (TNK == TNK_Dependent_template_name) 519 AnnotateTemplateIdTokenAsType(SS); 520 521 // If we didn't end up with a typename token, there's nothing more we 522 // can do. 523 if (Tok.isNot(tok::annot_typename)) 524 return true; 525 526 // Retrieve the type from the annotation token, consume that token, and 527 // return. 528 EndLocation = Tok.getAnnotationEndLoc(); 529 TypeTy *Type = Tok.getAnnotationValue(); 530 ConsumeToken(); 531 return Type; 532 } 533 534 // We have an identifier; check whether it is actually a type. 535 TypeTy *Type = Actions.getTypeName(*Id, IdLoc, CurScope, SS, true); 536 if (!Type) { 537 Diag(IdLoc, DestrExpected ? diag::err_destructor_class_name 538 : diag::err_expected_class_name); 539 return true; 540 } 541 542 // Consume the identifier. 543 EndLocation = IdLoc; 544 return Type; 545} 546 547/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or 548/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which 549/// until we reach the start of a definition or see a token that 550/// cannot start a definition. 551/// 552/// class-specifier: [C++ class] 553/// class-head '{' member-specification[opt] '}' 554/// class-head '{' member-specification[opt] '}' attributes[opt] 555/// class-head: 556/// class-key identifier[opt] base-clause[opt] 557/// class-key nested-name-specifier identifier base-clause[opt] 558/// class-key nested-name-specifier[opt] simple-template-id 559/// base-clause[opt] 560/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] 561/// [GNU] class-key attributes[opt] nested-name-specifier 562/// identifier base-clause[opt] 563/// [GNU] class-key attributes[opt] nested-name-specifier[opt] 564/// simple-template-id base-clause[opt] 565/// class-key: 566/// 'class' 567/// 'struct' 568/// 'union' 569/// 570/// elaborated-type-specifier: [C++ dcl.type.elab] 571/// class-key ::[opt] nested-name-specifier[opt] identifier 572/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] 573/// simple-template-id 574/// 575/// Note that the C++ class-specifier and elaborated-type-specifier, 576/// together, subsume the C99 struct-or-union-specifier: 577/// 578/// struct-or-union-specifier: [C99 6.7.2.1] 579/// struct-or-union identifier[opt] '{' struct-contents '}' 580/// struct-or-union identifier 581/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents 582/// '}' attributes[opt] 583/// [GNU] struct-or-union attributes[opt] identifier 584/// struct-or-union: 585/// 'struct' 586/// 'union' 587void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, 588 SourceLocation StartLoc, DeclSpec &DS, 589 const ParsedTemplateInfo &TemplateInfo, 590 AccessSpecifier AS) { 591 DeclSpec::TST TagType; 592 if (TagTokKind == tok::kw_struct) 593 TagType = DeclSpec::TST_struct; 594 else if (TagTokKind == tok::kw_class) 595 TagType = DeclSpec::TST_class; 596 else { 597 assert(TagTokKind == tok::kw_union && "Not a class specifier"); 598 TagType = DeclSpec::TST_union; 599 } 600 601 if (Tok.is(tok::code_completion)) { 602 // Code completion for a struct, class, or union name. 603 Actions.CodeCompleteTag(CurScope, TagType); 604 ConsumeToken(); 605 } 606 607 AttributeList *AttrList = 0; 608 // If attributes exist after tag, parse them. 609 if (Tok.is(tok::kw___attribute)) 610 AttrList = ParseGNUAttributes(); 611 612 // If declspecs exist after tag, parse them. 613 if (Tok.is(tok::kw___declspec)) 614 AttrList = ParseMicrosoftDeclSpec(AttrList); 615 616 // If C++0x attributes exist here, parse them. 617 // FIXME: Are we consistent with the ordering of parsing of different 618 // styles of attributes? 619 if (isCXX0XAttributeSpecifier()) 620 AttrList = addAttributeLists(AttrList, ParseCXX0XAttributes().AttrList); 621 622 if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_pod)) { 623 // GNU libstdc++ 4.2 uses __is_pod as the name of a struct template, but 624 // __is_pod is a keyword in GCC >= 4.3. Therefore, when we see the 625 // token sequence "struct __is_pod", make __is_pod into a normal 626 // identifier rather than a keyword, to allow libstdc++ 4.2 to work 627 // properly. 628 Tok.getIdentifierInfo()->setTokenID(tok::identifier); 629 Tok.setKind(tok::identifier); 630 } 631 632 if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_empty)) { 633 // GNU libstdc++ 4.2 uses __is_empty as the name of a struct template, but 634 // __is_empty is a keyword in GCC >= 4.3. Therefore, when we see the 635 // token sequence "struct __is_empty", make __is_empty into a normal 636 // identifier rather than a keyword, to allow libstdc++ 4.2 to work 637 // properly. 638 Tok.getIdentifierInfo()->setTokenID(tok::identifier); 639 Tok.setKind(tok::identifier); 640 } 641 642 // Parse the (optional) nested-name-specifier. 643 CXXScopeSpec &SS = DS.getTypeSpecScope(); 644 if (getLang().CPlusPlus) { 645 // "FOO : BAR" is not a potential typo for "FOO::BAR". 646 ColonProtectionRAIIObject X(*this); 647 648 if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true)) 649 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) 650 Diag(Tok, diag::err_expected_ident); 651 } 652 653 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 654 655 // Parse the (optional) class name or simple-template-id. 656 IdentifierInfo *Name = 0; 657 SourceLocation NameLoc; 658 TemplateIdAnnotation *TemplateId = 0; 659 if (Tok.is(tok::identifier)) { 660 Name = Tok.getIdentifierInfo(); 661 NameLoc = ConsumeToken(); 662 663 if (Tok.is(tok::less)) { 664 // The name was supposed to refer to a template, but didn't. 665 // Eat the template argument list and try to continue parsing this as 666 // a class (or template thereof). 667 TemplateArgList TemplateArgs; 668 SourceLocation LAngleLoc, RAngleLoc; 669 if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, &SS, 670 true, LAngleLoc, 671 TemplateArgs, RAngleLoc)) { 672 // We couldn't parse the template argument list at all, so don't 673 // try to give any location information for the list. 674 LAngleLoc = RAngleLoc = SourceLocation(); 675 } 676 677 Diag(NameLoc, diag::err_explicit_spec_non_template) 678 << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 679 << (TagType == DeclSpec::TST_class? 0 680 : TagType == DeclSpec::TST_struct? 1 681 : 2) 682 << Name 683 << SourceRange(LAngleLoc, RAngleLoc); 684 685 // Strip off the last template parameter list if it was empty, since 686 // we've removed its template argument list. 687 if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) { 688 if (TemplateParams && TemplateParams->size() > 1) { 689 TemplateParams->pop_back(); 690 } else { 691 TemplateParams = 0; 692 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 693 = ParsedTemplateInfo::NonTemplate; 694 } 695 } else if (TemplateInfo.Kind 696 == ParsedTemplateInfo::ExplicitInstantiation) { 697 // Pretend this is just a forward declaration. 698 TemplateParams = 0; 699 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 700 = ParsedTemplateInfo::NonTemplate; 701 const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc 702 = SourceLocation(); 703 const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc 704 = SourceLocation(); 705 } 706 707 708 } 709 } else if (Tok.is(tok::annot_template_id)) { 710 TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 711 NameLoc = ConsumeToken(); 712 713 if (TemplateId->Kind != TNK_Type_template) { 714 // The template-name in the simple-template-id refers to 715 // something other than a class template. Give an appropriate 716 // error message and skip to the ';'. 717 SourceRange Range(NameLoc); 718 if (SS.isNotEmpty()) 719 Range.setBegin(SS.getBeginLoc()); 720 721 Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) 722 << Name << static_cast<int>(TemplateId->Kind) << Range; 723 724 DS.SetTypeSpecError(); 725 SkipUntil(tok::semi, false, true); 726 TemplateId->Destroy(); 727 return; 728 } 729 } 730 731 // There are four options here. If we have 'struct foo;', then this 732 // is either a forward declaration or a friend declaration, which 733 // have to be treated differently. If we have 'struct foo {...' or 734 // 'struct foo :...' then this is a definition. Otherwise we have 735 // something like 'struct foo xyz', a reference. 736 Action::TagUseKind TUK; 737 if (Tok.is(tok::l_brace) || (getLang().CPlusPlus && Tok.is(tok::colon))) { 738 if (DS.isFriendSpecified()) { 739 // C++ [class.friend]p2: 740 // A class shall not be defined in a friend declaration. 741 Diag(Tok.getLocation(), diag::err_friend_decl_defines_class) 742 << SourceRange(DS.getFriendSpecLoc()); 743 744 // Skip everything up to the semicolon, so that this looks like a proper 745 // friend class (or template thereof) declaration. 746 SkipUntil(tok::semi, true, true); 747 TUK = Action::TUK_Friend; 748 } else { 749 // Okay, this is a class definition. 750 TUK = Action::TUK_Definition; 751 } 752 } else if (Tok.is(tok::semi)) 753 TUK = DS.isFriendSpecified() ? Action::TUK_Friend : Action::TUK_Declaration; 754 else 755 TUK = Action::TUK_Reference; 756 757 if (!Name && !TemplateId && TUK != Action::TUK_Definition) { 758 // We have a declaration or reference to an anonymous class. 759 Diag(StartLoc, diag::err_anon_type_definition) 760 << DeclSpec::getSpecifierName(TagType); 761 762 SkipUntil(tok::comma, true); 763 764 if (TemplateId) 765 TemplateId->Destroy(); 766 return; 767 } 768 769 // Create the tag portion of the class or class template. 770 Action::DeclResult TagOrTempResult = true; // invalid 771 Action::TypeResult TypeResult = true; // invalid 772 773 // FIXME: When TUK == TUK_Reference and we have a template-id, we need 774 // to turn that template-id into a type. 775 776 bool Owned = false; 777 if (TemplateId) { 778 // Explicit specialization, class template partial specialization, 779 // or explicit instantiation. 780 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 781 TemplateId->getTemplateArgs(), 782 TemplateId->NumArgs); 783 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 784 TUK == Action::TUK_Declaration) { 785 // This is an explicit instantiation of a class template. 786 TagOrTempResult 787 = Actions.ActOnExplicitInstantiation(CurScope, 788 TemplateInfo.ExternLoc, 789 TemplateInfo.TemplateLoc, 790 TagType, 791 StartLoc, 792 SS, 793 TemplateTy::make(TemplateId->Template), 794 TemplateId->TemplateNameLoc, 795 TemplateId->LAngleLoc, 796 TemplateArgsPtr, 797 TemplateId->RAngleLoc, 798 AttrList); 799 } else if (TUK == Action::TUK_Reference) { 800 TypeResult 801 = Actions.ActOnTemplateIdType(TemplateTy::make(TemplateId->Template), 802 TemplateId->TemplateNameLoc, 803 TemplateId->LAngleLoc, 804 TemplateArgsPtr, 805 TemplateId->RAngleLoc); 806 807 TypeResult = Actions.ActOnTagTemplateIdType(TypeResult, TUK, 808 TagType, StartLoc); 809 } else { 810 // This is an explicit specialization or a class template 811 // partial specialization. 812 TemplateParameterLists FakedParamLists; 813 814 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 815 // This looks like an explicit instantiation, because we have 816 // something like 817 // 818 // template class Foo<X> 819 // 820 // but it actually has a definition. Most likely, this was 821 // meant to be an explicit specialization, but the user forgot 822 // the '<>' after 'template'. 823 assert(TUK == Action::TUK_Definition && "Expected a definition here"); 824 825 SourceLocation LAngleLoc 826 = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 827 Diag(TemplateId->TemplateNameLoc, 828 diag::err_explicit_instantiation_with_definition) 829 << SourceRange(TemplateInfo.TemplateLoc) 830 << CodeModificationHint::CreateInsertion(LAngleLoc, "<>"); 831 832 // Create a fake template parameter list that contains only 833 // "template<>", so that we treat this construct as a class 834 // template specialization. 835 FakedParamLists.push_back( 836 Actions.ActOnTemplateParameterList(0, SourceLocation(), 837 TemplateInfo.TemplateLoc, 838 LAngleLoc, 839 0, 0, 840 LAngleLoc)); 841 TemplateParams = &FakedParamLists; 842 } 843 844 // Build the class template specialization. 845 TagOrTempResult 846 = Actions.ActOnClassTemplateSpecialization(CurScope, TagType, TUK, 847 StartLoc, SS, 848 TemplateTy::make(TemplateId->Template), 849 TemplateId->TemplateNameLoc, 850 TemplateId->LAngleLoc, 851 TemplateArgsPtr, 852 TemplateId->RAngleLoc, 853 AttrList, 854 Action::MultiTemplateParamsArg(Actions, 855 TemplateParams? &(*TemplateParams)[0] : 0, 856 TemplateParams? TemplateParams->size() : 0)); 857 } 858 TemplateId->Destroy(); 859 } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 860 TUK == Action::TUK_Declaration) { 861 // Explicit instantiation of a member of a class template 862 // specialization, e.g., 863 // 864 // template struct Outer<int>::Inner; 865 // 866 TagOrTempResult 867 = Actions.ActOnExplicitInstantiation(CurScope, 868 TemplateInfo.ExternLoc, 869 TemplateInfo.TemplateLoc, 870 TagType, StartLoc, SS, Name, 871 NameLoc, AttrList); 872 } else { 873 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 874 TUK == Action::TUK_Definition) { 875 // FIXME: Diagnose this particular error. 876 } 877 878 bool IsDependent = false; 879 880 // Declaration or definition of a class type 881 TagOrTempResult = Actions.ActOnTag(CurScope, TagType, TUK, StartLoc, SS, 882 Name, NameLoc, AttrList, AS, 883 Action::MultiTemplateParamsArg(Actions, 884 TemplateParams? &(*TemplateParams)[0] : 0, 885 TemplateParams? TemplateParams->size() : 0), 886 Owned, IsDependent); 887 888 // If ActOnTag said the type was dependent, try again with the 889 // less common call. 890 if (IsDependent) 891 TypeResult = Actions.ActOnDependentTag(CurScope, TagType, TUK, 892 SS, Name, StartLoc, NameLoc); 893 } 894 895 // If there is a body, parse it and inform the actions module. 896 if (TUK == Action::TUK_Definition) { 897 assert(Tok.is(tok::l_brace) || 898 (getLang().CPlusPlus && Tok.is(tok::colon))); 899 if (getLang().CPlusPlus) 900 ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); 901 else 902 ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); 903 } 904 905 void *Result; 906 if (!TypeResult.isInvalid()) { 907 TagType = DeclSpec::TST_typename; 908 Result = TypeResult.get(); 909 Owned = false; 910 } else if (!TagOrTempResult.isInvalid()) { 911 Result = TagOrTempResult.get().getAs<void>(); 912 } else { 913 DS.SetTypeSpecError(); 914 return; 915 } 916 917 const char *PrevSpec = 0; 918 unsigned DiagID; 919 920 if (DS.SetTypeSpecType(TagType, StartLoc, PrevSpec, DiagID, 921 Result, Owned)) 922 Diag(StartLoc, DiagID) << PrevSpec; 923} 924 925/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. 926/// 927/// base-clause : [C++ class.derived] 928/// ':' base-specifier-list 929/// base-specifier-list: 930/// base-specifier '...'[opt] 931/// base-specifier-list ',' base-specifier '...'[opt] 932void Parser::ParseBaseClause(DeclPtrTy ClassDecl) { 933 assert(Tok.is(tok::colon) && "Not a base clause"); 934 ConsumeToken(); 935 936 // Build up an array of parsed base specifiers. 937 llvm::SmallVector<BaseTy *, 8> BaseInfo; 938 939 while (true) { 940 // Parse a base-specifier. 941 BaseResult Result = ParseBaseSpecifier(ClassDecl); 942 if (Result.isInvalid()) { 943 // Skip the rest of this base specifier, up until the comma or 944 // opening brace. 945 SkipUntil(tok::comma, tok::l_brace, true, true); 946 } else { 947 // Add this to our array of base specifiers. 948 BaseInfo.push_back(Result.get()); 949 } 950 951 // If the next token is a comma, consume it and keep reading 952 // base-specifiers. 953 if (Tok.isNot(tok::comma)) break; 954 955 // Consume the comma. 956 ConsumeToken(); 957 } 958 959 // Attach the base specifiers 960 Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size()); 961} 962 963/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is 964/// one entry in the base class list of a class specifier, for example: 965/// class foo : public bar, virtual private baz { 966/// 'public bar' and 'virtual private baz' are each base-specifiers. 967/// 968/// base-specifier: [C++ class.derived] 969/// ::[opt] nested-name-specifier[opt] class-name 970/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] 971/// class-name 972/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] 973/// class-name 974Parser::BaseResult Parser::ParseBaseSpecifier(DeclPtrTy ClassDecl) { 975 bool IsVirtual = false; 976 SourceLocation StartLoc = Tok.getLocation(); 977 978 // Parse the 'virtual' keyword. 979 if (Tok.is(tok::kw_virtual)) { 980 ConsumeToken(); 981 IsVirtual = true; 982 } 983 984 // Parse an (optional) access specifier. 985 AccessSpecifier Access = getAccessSpecifierIfPresent(); 986 if (Access) 987 ConsumeToken(); 988 989 // Parse the 'virtual' keyword (again!), in case it came after the 990 // access specifier. 991 if (Tok.is(tok::kw_virtual)) { 992 SourceLocation VirtualLoc = ConsumeToken(); 993 if (IsVirtual) { 994 // Complain about duplicate 'virtual' 995 Diag(VirtualLoc, diag::err_dup_virtual) 996 << CodeModificationHint::CreateRemoval(VirtualLoc); 997 } 998 999 IsVirtual = true; 1000 } 1001 1002 // Parse optional '::' and optional nested-name-specifier. 1003 CXXScopeSpec SS; 1004 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true); 1005 1006 // The location of the base class itself. 1007 SourceLocation BaseLoc = Tok.getLocation(); 1008 1009 // Parse the class-name. 1010 SourceLocation EndLocation; 1011 TypeResult BaseType = ParseClassName(EndLocation, &SS); 1012 if (BaseType.isInvalid()) 1013 return true; 1014 1015 // Find the complete source range for the base-specifier. 1016 SourceRange Range(StartLoc, EndLocation); 1017 1018 // Notify semantic analysis that we have parsed a complete 1019 // base-specifier. 1020 return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, 1021 BaseType.get(), BaseLoc); 1022} 1023 1024/// getAccessSpecifierIfPresent - Determine whether the next token is 1025/// a C++ access-specifier. 1026/// 1027/// access-specifier: [C++ class.derived] 1028/// 'private' 1029/// 'protected' 1030/// 'public' 1031AccessSpecifier Parser::getAccessSpecifierIfPresent() const { 1032 switch (Tok.getKind()) { 1033 default: return AS_none; 1034 case tok::kw_private: return AS_private; 1035 case tok::kw_protected: return AS_protected; 1036 case tok::kw_public: return AS_public; 1037 } 1038} 1039 1040void Parser::HandleMemberFunctionDefaultArgs(Declarator& DeclaratorInfo, 1041 DeclPtrTy ThisDecl) { 1042 // We just declared a member function. If this member function 1043 // has any default arguments, we'll need to parse them later. 1044 LateParsedMethodDeclaration *LateMethod = 0; 1045 DeclaratorChunk::FunctionTypeInfo &FTI 1046 = DeclaratorInfo.getTypeObject(0).Fun; 1047 for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { 1048 if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { 1049 if (!LateMethod) { 1050 // Push this method onto the stack of late-parsed method 1051 // declarations. 1052 getCurrentClass().MethodDecls.push_back( 1053 LateParsedMethodDeclaration(ThisDecl)); 1054 LateMethod = &getCurrentClass().MethodDecls.back(); 1055 LateMethod->TemplateScope = CurScope->isTemplateParamScope(); 1056 1057 // Add all of the parameters prior to this one (they don't 1058 // have default arguments). 1059 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 1060 for (unsigned I = 0; I < ParamIdx; ++I) 1061 LateMethod->DefaultArgs.push_back( 1062 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param)); 1063 } 1064 1065 // Add this parameter to the list of parameters (it or may 1066 // not have a default argument). 1067 LateMethod->DefaultArgs.push_back( 1068 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, 1069 FTI.ArgInfo[ParamIdx].DefaultArgTokens)); 1070 } 1071 } 1072} 1073 1074/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. 1075/// 1076/// member-declaration: 1077/// decl-specifier-seq[opt] member-declarator-list[opt] ';' 1078/// function-definition ';'[opt] 1079/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] 1080/// using-declaration [TODO] 1081/// [C++0x] static_assert-declaration 1082/// template-declaration 1083/// [GNU] '__extension__' member-declaration 1084/// 1085/// member-declarator-list: 1086/// member-declarator 1087/// member-declarator-list ',' member-declarator 1088/// 1089/// member-declarator: 1090/// declarator pure-specifier[opt] 1091/// declarator constant-initializer[opt] 1092/// identifier[opt] ':' constant-expression 1093/// 1094/// pure-specifier: 1095/// '= 0' 1096/// 1097/// constant-initializer: 1098/// '=' constant-expression 1099/// 1100void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS, 1101 const ParsedTemplateInfo &TemplateInfo) { 1102 // Access declarations. 1103 if (!TemplateInfo.Kind && 1104 (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 1105 TryAnnotateCXXScopeToken() && 1106 Tok.is(tok::annot_cxxscope)) { 1107 bool isAccessDecl = false; 1108 if (NextToken().is(tok::identifier)) 1109 isAccessDecl = GetLookAheadToken(2).is(tok::semi); 1110 else 1111 isAccessDecl = NextToken().is(tok::kw_operator); 1112 1113 if (isAccessDecl) { 1114 // Collect the scope specifier token we annotated earlier. 1115 CXXScopeSpec SS; 1116 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType*/ 0, false); 1117 1118 // Try to parse an unqualified-id. 1119 UnqualifiedId Name; 1120 if (ParseUnqualifiedId(SS, false, true, true, /*ObjectType*/ 0, Name)) { 1121 SkipUntil(tok::semi); 1122 return; 1123 } 1124 1125 // TODO: recover from mistakenly-qualified operator declarations. 1126 if (ExpectAndConsume(tok::semi, 1127 diag::err_expected_semi_after, 1128 "access declaration", 1129 tok::semi)) 1130 return; 1131 1132 Actions.ActOnUsingDeclaration(CurScope, AS, 1133 false, SourceLocation(), 1134 SS, Name, 1135 /* AttrList */ 0, 1136 /* IsTypeName */ false, 1137 SourceLocation()); 1138 return; 1139 } 1140 } 1141 1142 // static_assert-declaration 1143 if (Tok.is(tok::kw_static_assert)) { 1144 // FIXME: Check for templates 1145 SourceLocation DeclEnd; 1146 ParseStaticAssertDeclaration(DeclEnd); 1147 return; 1148 } 1149 1150 if (Tok.is(tok::kw_template)) { 1151 assert(!TemplateInfo.TemplateParams && 1152 "Nested template improperly parsed?"); 1153 SourceLocation DeclEnd; 1154 ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd, 1155 AS); 1156 return; 1157 } 1158 1159 // Handle: member-declaration ::= '__extension__' member-declaration 1160 if (Tok.is(tok::kw___extension__)) { 1161 // __extension__ silences extension warnings in the subexpression. 1162 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1163 ConsumeToken(); 1164 return ParseCXXClassMemberDeclaration(AS, TemplateInfo); 1165 } 1166 1167 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1168 ColonProtectionRAIIObject X(*this); 1169 1170 CXX0XAttributeList AttrList; 1171 // Optional C++0x attribute-specifier 1172 if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) 1173 AttrList = ParseCXX0XAttributes(); 1174 1175 if (Tok.is(tok::kw_using)) { 1176 // FIXME: Check for template aliases 1177 1178 if (AttrList.HasAttr) 1179 Diag(AttrList.Range.getBegin(), diag::err_attributes_not_allowed) 1180 << AttrList.Range; 1181 1182 // Eat 'using'. 1183 SourceLocation UsingLoc = ConsumeToken(); 1184 1185 if (Tok.is(tok::kw_namespace)) { 1186 Diag(UsingLoc, diag::err_using_namespace_in_class); 1187 SkipUntil(tok::semi, true, true); 1188 } 1189 else { 1190 SourceLocation DeclEnd; 1191 // Otherwise, it must be using-declaration. 1192 ParseUsingDeclaration(Declarator::MemberContext, UsingLoc, DeclEnd, AS); 1193 } 1194 return; 1195 } 1196 1197 SourceLocation DSStart = Tok.getLocation(); 1198 // decl-specifier-seq: 1199 // Parse the common declaration-specifiers piece. 1200 ParsingDeclSpec DS(*this); 1201 DS.AddAttributes(AttrList.AttrList); 1202 ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class); 1203 1204 Action::MultiTemplateParamsArg TemplateParams(Actions, 1205 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0, 1206 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); 1207 1208 if (Tok.is(tok::semi)) { 1209 ConsumeToken(); 1210 Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 1211 return; 1212 } 1213 1214 ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); 1215 1216 if (Tok.isNot(tok::colon)) { 1217 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1218 ColonProtectionRAIIObject X(*this); 1219 1220 // Parse the first declarator. 1221 ParseDeclarator(DeclaratorInfo); 1222 // Error parsing the declarator? 1223 if (!DeclaratorInfo.hasName()) { 1224 // If so, skip until the semi-colon or a }. 1225 SkipUntil(tok::r_brace, true); 1226 if (Tok.is(tok::semi)) 1227 ConsumeToken(); 1228 return; 1229 } 1230 1231 // If attributes exist after the declarator, but before an '{', parse them. 1232 if (Tok.is(tok::kw___attribute)) { 1233 SourceLocation Loc; 1234 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1235 DeclaratorInfo.AddAttributes(AttrList, Loc); 1236 } 1237 1238 // function-definition: 1239 if (Tok.is(tok::l_brace) 1240 || (DeclaratorInfo.isFunctionDeclarator() && 1241 (Tok.is(tok::colon) || Tok.is(tok::kw_try)))) { 1242 if (!DeclaratorInfo.isFunctionDeclarator()) { 1243 Diag(Tok, diag::err_func_def_no_params); 1244 ConsumeBrace(); 1245 SkipUntil(tok::r_brace, true); 1246 return; 1247 } 1248 1249 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1250 Diag(Tok, diag::err_function_declared_typedef); 1251 // This recovery skips the entire function body. It would be nice 1252 // to simply call ParseCXXInlineMethodDef() below, however Sema 1253 // assumes the declarator represents a function, not a typedef. 1254 ConsumeBrace(); 1255 SkipUntil(tok::r_brace, true); 1256 return; 1257 } 1258 1259 ParseCXXInlineMethodDef(AS, DeclaratorInfo, TemplateInfo); 1260 return; 1261 } 1262 } 1263 1264 // member-declarator-list: 1265 // member-declarator 1266 // member-declarator-list ',' member-declarator 1267 1268 llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup; 1269 OwningExprResult BitfieldSize(Actions); 1270 OwningExprResult Init(Actions); 1271 bool Deleted = false; 1272 1273 while (1) { 1274 // member-declarator: 1275 // declarator pure-specifier[opt] 1276 // declarator constant-initializer[opt] 1277 // identifier[opt] ':' constant-expression 1278 1279 if (Tok.is(tok::colon)) { 1280 ConsumeToken(); 1281 BitfieldSize = ParseConstantExpression(); 1282 if (BitfieldSize.isInvalid()) 1283 SkipUntil(tok::comma, true, true); 1284 } 1285 1286 // pure-specifier: 1287 // '= 0' 1288 // 1289 // constant-initializer: 1290 // '=' constant-expression 1291 // 1292 // defaulted/deleted function-definition: 1293 // '=' 'default' [TODO] 1294 // '=' 'delete' 1295 1296 if (Tok.is(tok::equal)) { 1297 ConsumeToken(); 1298 if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) { 1299 ConsumeToken(); 1300 Deleted = true; 1301 } else { 1302 Init = ParseInitializer(); 1303 if (Init.isInvalid()) 1304 SkipUntil(tok::comma, true, true); 1305 } 1306 } 1307 1308 // If attributes exist after the declarator, parse them. 1309 if (Tok.is(tok::kw___attribute)) { 1310 SourceLocation Loc; 1311 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1312 DeclaratorInfo.AddAttributes(AttrList, Loc); 1313 } 1314 1315 // NOTE: If Sema is the Action module and declarator is an instance field, 1316 // this call will *not* return the created decl; It will return null. 1317 // See Sema::ActOnCXXMemberDeclarator for details. 1318 1319 DeclPtrTy ThisDecl; 1320 if (DS.isFriendSpecified()) { 1321 // TODO: handle initializers, bitfields, 'delete' 1322 ThisDecl = Actions.ActOnFriendFunctionDecl(CurScope, DeclaratorInfo, 1323 /*IsDefinition*/ false, 1324 move(TemplateParams)); 1325 } else { 1326 ThisDecl = Actions.ActOnCXXMemberDeclarator(CurScope, AS, 1327 DeclaratorInfo, 1328 move(TemplateParams), 1329 BitfieldSize.release(), 1330 Init.release(), 1331 /*IsDefinition*/Deleted, 1332 Deleted); 1333 } 1334 if (ThisDecl) 1335 DeclsInGroup.push_back(ThisDecl); 1336 1337 if (DeclaratorInfo.isFunctionDeclarator() && 1338 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 1339 != DeclSpec::SCS_typedef) { 1340 HandleMemberFunctionDefaultArgs(DeclaratorInfo, ThisDecl); 1341 } 1342 1343 DeclaratorInfo.complete(ThisDecl); 1344 1345 // If we don't have a comma, it is either the end of the list (a ';') 1346 // or an error, bail out. 1347 if (Tok.isNot(tok::comma)) 1348 break; 1349 1350 // Consume the comma. 1351 ConsumeToken(); 1352 1353 // Parse the next declarator. 1354 DeclaratorInfo.clear(); 1355 BitfieldSize = 0; 1356 Init = 0; 1357 Deleted = false; 1358 1359 // Attributes are only allowed on the second declarator. 1360 if (Tok.is(tok::kw___attribute)) { 1361 SourceLocation Loc; 1362 AttributeList *AttrList = ParseGNUAttributes(&Loc); 1363 DeclaratorInfo.AddAttributes(AttrList, Loc); 1364 } 1365 1366 if (Tok.isNot(tok::colon)) 1367 ParseDeclarator(DeclaratorInfo); 1368 } 1369 1370 if (Tok.is(tok::semi)) { 1371 ConsumeToken(); 1372 Actions.FinalizeDeclaratorGroup(CurScope, DS, DeclsInGroup.data(), 1373 DeclsInGroup.size()); 1374 return; 1375 } 1376 1377 Diag(Tok, diag::err_expected_semi_decl_list); 1378 // Skip to end of block or statement 1379 SkipUntil(tok::r_brace, true, true); 1380 if (Tok.is(tok::semi)) 1381 ConsumeToken(); 1382 return; 1383} 1384 1385/// ParseCXXMemberSpecification - Parse the class definition. 1386/// 1387/// member-specification: 1388/// member-declaration member-specification[opt] 1389/// access-specifier ':' member-specification[opt] 1390/// 1391void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, 1392 unsigned TagType, DeclPtrTy TagDecl) { 1393 assert((TagType == DeclSpec::TST_struct || 1394 TagType == DeclSpec::TST_union || 1395 TagType == DeclSpec::TST_class) && "Invalid TagType!"); 1396 1397 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, 1398 PP.getSourceManager(), 1399 "parsing struct/union/class body"); 1400 1401 // Determine whether this is a non-nested class. Note that local 1402 // classes are *not* considered to be nested classes. 1403 bool NonNestedClass = true; 1404 if (!ClassStack.empty()) { 1405 for (const Scope *S = CurScope; S; S = S->getParent()) { 1406 if (S->isClassScope()) { 1407 // We're inside a class scope, so this is a nested class. 1408 NonNestedClass = false; 1409 break; 1410 } 1411 1412 if ((S->getFlags() & Scope::FnScope)) { 1413 // If we're in a function or function template declared in the 1414 // body of a class, then this is a local class rather than a 1415 // nested class. 1416 const Scope *Parent = S->getParent(); 1417 if (Parent->isTemplateParamScope()) 1418 Parent = Parent->getParent(); 1419 if (Parent->isClassScope()) 1420 break; 1421 } 1422 } 1423 } 1424 1425 // Enter a scope for the class. 1426 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); 1427 1428 // Note that we are parsing a new (potentially-nested) class definition. 1429 ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass); 1430 1431 if (TagDecl) 1432 Actions.ActOnTagStartDefinition(CurScope, TagDecl); 1433 1434 if (Tok.is(tok::colon)) { 1435 ParseBaseClause(TagDecl); 1436 1437 if (!Tok.is(tok::l_brace)) { 1438 Diag(Tok, diag::err_expected_lbrace_after_base_specifiers); 1439 return; 1440 } 1441 } 1442 1443 assert(Tok.is(tok::l_brace)); 1444 1445 SourceLocation LBraceLoc = ConsumeBrace(); 1446 1447 if (!TagDecl) { 1448 SkipUntil(tok::r_brace, false, false); 1449 return; 1450 } 1451 1452 Actions.ActOnStartCXXMemberDeclarations(CurScope, TagDecl, LBraceLoc); 1453 1454 // C++ 11p3: Members of a class defined with the keyword class are private 1455 // by default. Members of a class defined with the keywords struct or union 1456 // are public by default. 1457 AccessSpecifier CurAS; 1458 if (TagType == DeclSpec::TST_class) 1459 CurAS = AS_private; 1460 else 1461 CurAS = AS_public; 1462 1463 // While we still have something to read, read the member-declarations. 1464 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1465 // Each iteration of this loop reads one member-declaration. 1466 1467 // Check for extraneous top-level semicolon. 1468 if (Tok.is(tok::semi)) { 1469 Diag(Tok, diag::ext_extra_struct_semi) 1470 << CodeModificationHint::CreateRemoval(Tok.getLocation()); 1471 ConsumeToken(); 1472 continue; 1473 } 1474 1475 AccessSpecifier AS = getAccessSpecifierIfPresent(); 1476 if (AS != AS_none) { 1477 // Current token is a C++ access specifier. 1478 CurAS = AS; 1479 ConsumeToken(); 1480 ExpectAndConsume(tok::colon, diag::err_expected_colon); 1481 continue; 1482 } 1483 1484 // FIXME: Make sure we don't have a template here. 1485 1486 // Parse all the comma separated declarators. 1487 ParseCXXClassMemberDeclaration(CurAS); 1488 } 1489 1490 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1491 1492 AttributeList *AttrList = 0; 1493 // If attributes exist after class contents, parse them. 1494 if (Tok.is(tok::kw___attribute)) 1495 AttrList = ParseGNUAttributes(); // FIXME: where should I put them? 1496 1497 Actions.ActOnFinishCXXMemberSpecification(CurScope, RecordLoc, TagDecl, 1498 LBraceLoc, RBraceLoc); 1499 1500 // C++ 9.2p2: Within the class member-specification, the class is regarded as 1501 // complete within function bodies, default arguments, 1502 // exception-specifications, and constructor ctor-initializers (including 1503 // such things in nested classes). 1504 // 1505 // FIXME: Only function bodies and constructor ctor-initializers are 1506 // parsed correctly, fix the rest. 1507 if (NonNestedClass) { 1508 // We are not inside a nested class. This class and its nested classes 1509 // are complete and we can parse the delayed portions of method 1510 // declarations and the lexed inline method definitions. 1511 ParseLexedMethodDeclarations(getCurrentClass()); 1512 ParseLexedMethodDefs(getCurrentClass()); 1513 } 1514 1515 // Leave the class scope. 1516 ParsingDef.Pop(); 1517 ClassScope.Exit(); 1518 1519 Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc); 1520} 1521 1522/// ParseConstructorInitializer - Parse a C++ constructor initializer, 1523/// which explicitly initializes the members or base classes of a 1524/// class (C++ [class.base.init]). For example, the three initializers 1525/// after the ':' in the Derived constructor below: 1526/// 1527/// @code 1528/// class Base { }; 1529/// class Derived : Base { 1530/// int x; 1531/// float f; 1532/// public: 1533/// Derived(float f) : Base(), x(17), f(f) { } 1534/// }; 1535/// @endcode 1536/// 1537/// [C++] ctor-initializer: 1538/// ':' mem-initializer-list 1539/// 1540/// [C++] mem-initializer-list: 1541/// mem-initializer 1542/// mem-initializer , mem-initializer-list 1543void Parser::ParseConstructorInitializer(DeclPtrTy ConstructorDecl) { 1544 assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); 1545 1546 SourceLocation ColonLoc = ConsumeToken(); 1547 1548 llvm::SmallVector<MemInitTy*, 4> MemInitializers; 1549 1550 do { 1551 MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); 1552 if (!MemInit.isInvalid()) 1553 MemInitializers.push_back(MemInit.get()); 1554 1555 if (Tok.is(tok::comma)) 1556 ConsumeToken(); 1557 else if (Tok.is(tok::l_brace)) 1558 break; 1559 else { 1560 // Skip over garbage, until we get to '{'. Don't eat the '{'. 1561 Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); 1562 SkipUntil(tok::l_brace, true, true); 1563 break; 1564 } 1565 } while (true); 1566 1567 Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, 1568 MemInitializers.data(), MemInitializers.size()); 1569} 1570 1571/// ParseMemInitializer - Parse a C++ member initializer, which is 1572/// part of a constructor initializer that explicitly initializes one 1573/// member or base class (C++ [class.base.init]). See 1574/// ParseConstructorInitializer for an example. 1575/// 1576/// [C++] mem-initializer: 1577/// mem-initializer-id '(' expression-list[opt] ')' 1578/// 1579/// [C++] mem-initializer-id: 1580/// '::'[opt] nested-name-specifier[opt] class-name 1581/// identifier 1582Parser::MemInitResult Parser::ParseMemInitializer(DeclPtrTy ConstructorDecl) { 1583 // parse '::'[opt] nested-name-specifier[opt] 1584 CXXScopeSpec SS; 1585 ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false); 1586 TypeTy *TemplateTypeTy = 0; 1587 if (Tok.is(tok::annot_template_id)) { 1588 TemplateIdAnnotation *TemplateId 1589 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1590 if (TemplateId->Kind == TNK_Type_template || 1591 TemplateId->Kind == TNK_Dependent_template_name) { 1592 AnnotateTemplateIdTokenAsType(&SS); 1593 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 1594 TemplateTypeTy = Tok.getAnnotationValue(); 1595 } 1596 } 1597 if (!TemplateTypeTy && Tok.isNot(tok::identifier)) { 1598 Diag(Tok, diag::err_expected_member_or_base_name); 1599 return true; 1600 } 1601 1602 // Get the identifier. This may be a member name or a class name, 1603 // but we'll let the semantic analysis determine which it is. 1604 IdentifierInfo *II = Tok.is(tok::identifier) ? Tok.getIdentifierInfo() : 0; 1605 SourceLocation IdLoc = ConsumeToken(); 1606 1607 // Parse the '('. 1608 if (Tok.isNot(tok::l_paren)) { 1609 Diag(Tok, diag::err_expected_lparen); 1610 return true; 1611 } 1612 SourceLocation LParenLoc = ConsumeParen(); 1613 1614 // Parse the optional expression-list. 1615 ExprVector ArgExprs(Actions); 1616 CommaLocsTy CommaLocs; 1617 if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { 1618 SkipUntil(tok::r_paren); 1619 return true; 1620 } 1621 1622 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1623 1624 return Actions.ActOnMemInitializer(ConstructorDecl, CurScope, SS, II, 1625 TemplateTypeTy, IdLoc, 1626 LParenLoc, ArgExprs.take(), 1627 ArgExprs.size(), CommaLocs.data(), 1628 RParenLoc); 1629} 1630 1631/// ParseExceptionSpecification - Parse a C++ exception-specification 1632/// (C++ [except.spec]). 1633/// 1634/// exception-specification: 1635/// 'throw' '(' type-id-list [opt] ')' 1636/// [MS] 'throw' '(' '...' ')' 1637/// 1638/// type-id-list: 1639/// type-id 1640/// type-id-list ',' type-id 1641/// 1642bool Parser::ParseExceptionSpecification(SourceLocation &EndLoc, 1643 llvm::SmallVector<TypeTy*, 2> 1644 &Exceptions, 1645 llvm::SmallVector<SourceRange, 2> 1646 &Ranges, 1647 bool &hasAnyExceptionSpec) { 1648 assert(Tok.is(tok::kw_throw) && "expected throw"); 1649 1650 SourceLocation ThrowLoc = ConsumeToken(); 1651 1652 if (!Tok.is(tok::l_paren)) { 1653 return Diag(Tok, diag::err_expected_lparen_after) << "throw"; 1654 } 1655 SourceLocation LParenLoc = ConsumeParen(); 1656 1657 // Parse throw(...), a Microsoft extension that means "this function 1658 // can throw anything". 1659 if (Tok.is(tok::ellipsis)) { 1660 hasAnyExceptionSpec = true; 1661 SourceLocation EllipsisLoc = ConsumeToken(); 1662 if (!getLang().Microsoft) 1663 Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); 1664 EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1665 return false; 1666 } 1667 1668 // Parse the sequence of type-ids. 1669 SourceRange Range; 1670 while (Tok.isNot(tok::r_paren)) { 1671 TypeResult Res(ParseTypeName(&Range)); 1672 if (!Res.isInvalid()) { 1673 Exceptions.push_back(Res.get()); 1674 Ranges.push_back(Range); 1675 } 1676 if (Tok.is(tok::comma)) 1677 ConsumeToken(); 1678 else 1679 break; 1680 } 1681 1682 EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1683 return false; 1684} 1685 1686/// \brief We have just started parsing the definition of a new class, 1687/// so push that class onto our stack of classes that is currently 1688/// being parsed. 1689void Parser::PushParsingClass(DeclPtrTy ClassDecl, bool NonNestedClass) { 1690 assert((NonNestedClass || !ClassStack.empty()) && 1691 "Nested class without outer class"); 1692 ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass)); 1693} 1694 1695/// \brief Deallocate the given parsed class and all of its nested 1696/// classes. 1697void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { 1698 for (unsigned I = 0, N = Class->NestedClasses.size(); I != N; ++I) 1699 DeallocateParsedClasses(Class->NestedClasses[I]); 1700 delete Class; 1701} 1702 1703/// \brief Pop the top class of the stack of classes that are 1704/// currently being parsed. 1705/// 1706/// This routine should be called when we have finished parsing the 1707/// definition of a class, but have not yet popped the Scope 1708/// associated with the class's definition. 1709/// 1710/// \returns true if the class we've popped is a top-level class, 1711/// false otherwise. 1712void Parser::PopParsingClass() { 1713 assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); 1714 1715 ParsingClass *Victim = ClassStack.top(); 1716 ClassStack.pop(); 1717 if (Victim->TopLevelClass) { 1718 // Deallocate all of the nested classes of this class, 1719 // recursively: we don't need to keep any of this information. 1720 DeallocateParsedClasses(Victim); 1721 return; 1722 } 1723 assert(!ClassStack.empty() && "Missing top-level class?"); 1724 1725 if (Victim->MethodDecls.empty() && Victim->MethodDefs.empty() && 1726 Victim->NestedClasses.empty()) { 1727 // The victim is a nested class, but we will not need to perform 1728 // any processing after the definition of this class since it has 1729 // no members whose handling was delayed. Therefore, we can just 1730 // remove this nested class. 1731 delete Victim; 1732 return; 1733 } 1734 1735 // This nested class has some members that will need to be processed 1736 // after the top-level class is completely defined. Therefore, add 1737 // it to the list of nested classes within its parent. 1738 assert(CurScope->isClassScope() && "Nested class outside of class scope?"); 1739 ClassStack.top()->NestedClasses.push_back(Victim); 1740 Victim->TemplateScope = CurScope->getParent()->isTemplateParamScope(); 1741} 1742 1743/// ParseCXX0XAttributes - Parse a C++0x attribute-specifier. Currently only 1744/// parses standard attributes. 1745/// 1746/// [C++0x] attribute-specifier: 1747/// '[' '[' attribute-list ']' ']' 1748/// 1749/// [C++0x] attribute-list: 1750/// attribute[opt] 1751/// attribute-list ',' attribute[opt] 1752/// 1753/// [C++0x] attribute: 1754/// attribute-token attribute-argument-clause[opt] 1755/// 1756/// [C++0x] attribute-token: 1757/// identifier 1758/// attribute-scoped-token 1759/// 1760/// [C++0x] attribute-scoped-token: 1761/// attribute-namespace '::' identifier 1762/// 1763/// [C++0x] attribute-namespace: 1764/// identifier 1765/// 1766/// [C++0x] attribute-argument-clause: 1767/// '(' balanced-token-seq ')' 1768/// 1769/// [C++0x] balanced-token-seq: 1770/// balanced-token 1771/// balanced-token-seq balanced-token 1772/// 1773/// [C++0x] balanced-token: 1774/// '(' balanced-token-seq ')' 1775/// '[' balanced-token-seq ']' 1776/// '{' balanced-token-seq '}' 1777/// any token but '(', ')', '[', ']', '{', or '}' 1778CXX0XAttributeList Parser::ParseCXX0XAttributes(SourceLocation *EndLoc) { 1779 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) 1780 && "Not a C++0x attribute list"); 1781 1782 SourceLocation StartLoc = Tok.getLocation(), Loc; 1783 AttributeList *CurrAttr = 0; 1784 1785 ConsumeBracket(); 1786 ConsumeBracket(); 1787 1788 if (Tok.is(tok::comma)) { 1789 Diag(Tok.getLocation(), diag::err_expected_ident); 1790 ConsumeToken(); 1791 } 1792 1793 while (Tok.is(tok::identifier) || Tok.is(tok::comma)) { 1794 // attribute not present 1795 if (Tok.is(tok::comma)) { 1796 ConsumeToken(); 1797 continue; 1798 } 1799 1800 IdentifierInfo *ScopeName = 0, *AttrName = Tok.getIdentifierInfo(); 1801 SourceLocation ScopeLoc, AttrLoc = ConsumeToken(); 1802 1803 // scoped attribute 1804 if (Tok.is(tok::coloncolon)) { 1805 ConsumeToken(); 1806 1807 if (!Tok.is(tok::identifier)) { 1808 Diag(Tok.getLocation(), diag::err_expected_ident); 1809 SkipUntil(tok::r_square, tok::comma, true, true); 1810 continue; 1811 } 1812 1813 ScopeName = AttrName; 1814 ScopeLoc = AttrLoc; 1815 1816 AttrName = Tok.getIdentifierInfo(); 1817 AttrLoc = ConsumeToken(); 1818 } 1819 1820 bool AttrParsed = false; 1821 // No scoped names are supported; ideally we could put all non-standard 1822 // attributes into namespaces. 1823 if (!ScopeName) { 1824 switch(AttributeList::getKind(AttrName)) 1825 { 1826 // No arguments 1827 case AttributeList::AT_base_check: 1828 case AttributeList::AT_carries_dependency: 1829 case AttributeList::AT_final: 1830 case AttributeList::AT_hiding: 1831 case AttributeList::AT_noreturn: 1832 case AttributeList::AT_override: { 1833 if (Tok.is(tok::l_paren)) { 1834 Diag(Tok.getLocation(), diag::err_cxx0x_attribute_forbids_arguments) 1835 << AttrName->getName(); 1836 break; 1837 } 1838 1839 CurrAttr = new AttributeList(AttrName, AttrLoc, 0, AttrLoc, 0, 1840 SourceLocation(), 0, 0, CurrAttr, false, 1841 true); 1842 AttrParsed = true; 1843 break; 1844 } 1845 1846 // One argument; must be a type-id or assignment-expression 1847 case AttributeList::AT_aligned: { 1848 if (Tok.isNot(tok::l_paren)) { 1849 Diag(Tok.getLocation(), diag::err_cxx0x_attribute_requires_arguments) 1850 << AttrName->getName(); 1851 break; 1852 } 1853 SourceLocation ParamLoc = ConsumeParen(); 1854 1855 OwningExprResult ArgExpr = ParseCXX0XAlignArgument(ParamLoc); 1856 1857 MatchRHSPunctuation(tok::r_paren, ParamLoc); 1858 1859 ExprVector ArgExprs(Actions); 1860 ArgExprs.push_back(ArgExpr.release()); 1861 CurrAttr = new AttributeList(AttrName, AttrLoc, 0, AttrLoc, 1862 0, ParamLoc, ArgExprs.take(), 1, CurrAttr, 1863 false, true); 1864 1865 AttrParsed = true; 1866 break; 1867 } 1868 1869 // Silence warnings 1870 default: break; 1871 } 1872 } 1873 1874 // Skip the entire parameter clause, if any 1875 if (!AttrParsed && Tok.is(tok::l_paren)) { 1876 ConsumeParen(); 1877 // SkipUntil maintains the balancedness of tokens. 1878 SkipUntil(tok::r_paren, false); 1879 } 1880 } 1881 1882 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 1883 SkipUntil(tok::r_square, false); 1884 Loc = Tok.getLocation(); 1885 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 1886 SkipUntil(tok::r_square, false); 1887 1888 CXX0XAttributeList Attr (CurrAttr, SourceRange(StartLoc, Loc), true); 1889 return Attr; 1890} 1891 1892/// ParseCXX0XAlignArgument - Parse the argument to C++0x's [[align]] 1893/// attribute. 1894/// 1895/// FIXME: Simply returns an alignof() expression if the argument is a 1896/// type. Ideally, the type should be propagated directly into Sema. 1897/// 1898/// [C++0x] 'align' '(' type-id ')' 1899/// [C++0x] 'align' '(' assignment-expression ')' 1900Parser::OwningExprResult Parser::ParseCXX0XAlignArgument(SourceLocation Start) { 1901 if (isTypeIdInParens()) { 1902 EnterExpressionEvaluationContext Unevaluated(Actions, 1903 Action::Unevaluated); 1904 SourceLocation TypeLoc = Tok.getLocation(); 1905 TypeTy *Ty = ParseTypeName().get(); 1906 SourceRange TypeRange(Start, Tok.getLocation()); 1907 return Actions.ActOnSizeOfAlignOfExpr(TypeLoc, false, true, Ty, 1908 TypeRange); 1909 } else 1910 return ParseConstantExpression(); 1911} 1912