ParseDeclCXX.cpp revision bfcb037a3479de4a453a8275c64ae441c22d43f9
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/Sema/DeclSpec.h" 18#include "clang/Sema/Scope.h" 19#include "clang/Sema/ParsedTemplate.h" 20#include "clang/Sema/PrettyDeclStackTrace.h" 21#include "llvm/ADT/SmallString.h" 22#include "RAIIObjectsForParser.h" 23using namespace clang; 24 25/// ParseNamespace - We know that the current token is a namespace keyword. This 26/// may either be a top level namespace or a block-level namespace alias. If 27/// there was an inline keyword, it has already been parsed. 28/// 29/// namespace-definition: [C++ 7.3: basic.namespace] 30/// named-namespace-definition 31/// unnamed-namespace-definition 32/// 33/// unnamed-namespace-definition: 34/// 'inline'[opt] 'namespace' attributes[opt] '{' namespace-body '}' 35/// 36/// named-namespace-definition: 37/// original-namespace-definition 38/// extension-namespace-definition 39/// 40/// original-namespace-definition: 41/// 'inline'[opt] 'namespace' identifier attributes[opt] 42/// '{' namespace-body '}' 43/// 44/// extension-namespace-definition: 45/// 'inline'[opt] 'namespace' original-namespace-name 46/// '{' namespace-body '}' 47/// 48/// namespace-alias-definition: [C++ 7.3.2: namespace.alias] 49/// 'namespace' identifier '=' qualified-namespace-specifier ';' 50/// 51Decl *Parser::ParseNamespace(unsigned Context, 52 SourceLocation &DeclEnd, 53 SourceLocation InlineLoc) { 54 assert(Tok.is(tok::kw_namespace) && "Not a namespace!"); 55 SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'. 56 ObjCDeclContextSwitch ObjCDC(*this); 57 58 if (Tok.is(tok::code_completion)) { 59 Actions.CodeCompleteNamespaceDecl(getCurScope()); 60 cutOffParsing(); 61 return 0; 62 } 63 64 SourceLocation IdentLoc; 65 IdentifierInfo *Ident = 0; 66 std::vector<SourceLocation> ExtraIdentLoc; 67 std::vector<IdentifierInfo*> ExtraIdent; 68 std::vector<SourceLocation> ExtraNamespaceLoc; 69 70 Token attrTok; 71 72 if (Tok.is(tok::identifier)) { 73 Ident = Tok.getIdentifierInfo(); 74 IdentLoc = ConsumeToken(); // eat the identifier. 75 while (Tok.is(tok::coloncolon) && NextToken().is(tok::identifier)) { 76 ExtraNamespaceLoc.push_back(ConsumeToken()); 77 ExtraIdent.push_back(Tok.getIdentifierInfo()); 78 ExtraIdentLoc.push_back(ConsumeToken()); 79 } 80 } 81 82 // Read label attributes, if present. 83 ParsedAttributes attrs(AttrFactory); 84 if (Tok.is(tok::kw___attribute)) { 85 attrTok = Tok; 86 ParseGNUAttributes(attrs); 87 } 88 89 if (Tok.is(tok::equal)) { 90 if (!attrs.empty()) 91 Diag(attrTok, diag::err_unexpected_namespace_attributes_alias); 92 if (InlineLoc.isValid()) 93 Diag(InlineLoc, diag::err_inline_namespace_alias) 94 << FixItHint::CreateRemoval(InlineLoc); 95 return ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd); 96 } 97 98 99 BalancedDelimiterTracker T(*this, tok::l_brace); 100 if (T.consumeOpen()) { 101 if (!ExtraIdent.empty()) { 102 Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) 103 << SourceRange(ExtraNamespaceLoc.front(), ExtraIdentLoc.back()); 104 } 105 Diag(Tok, Ident ? diag::err_expected_lbrace : 106 diag::err_expected_ident_lbrace); 107 return 0; 108 } 109 110 if (getCurScope()->isClassScope() || getCurScope()->isTemplateParamScope() || 111 getCurScope()->isInObjcMethodScope() || getCurScope()->getBlockParent() || 112 getCurScope()->getFnParent()) { 113 if (!ExtraIdent.empty()) { 114 Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) 115 << SourceRange(ExtraNamespaceLoc.front(), ExtraIdentLoc.back()); 116 } 117 Diag(T.getOpenLocation(), diag::err_namespace_nonnamespace_scope); 118 SkipUntil(tok::r_brace, false); 119 return 0; 120 } 121 122 if (!ExtraIdent.empty()) { 123 TentativeParsingAction TPA(*this); 124 SkipUntil(tok::r_brace, /*StopAtSemi*/false, /*DontConsume*/true); 125 Token rBraceToken = Tok; 126 TPA.Revert(); 127 128 if (!rBraceToken.is(tok::r_brace)) { 129 Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) 130 << SourceRange(ExtraNamespaceLoc.front(), ExtraIdentLoc.back()); 131 } else { 132 std::string NamespaceFix; 133 for (std::vector<IdentifierInfo*>::iterator I = ExtraIdent.begin(), 134 E = ExtraIdent.end(); I != E; ++I) { 135 NamespaceFix += " { namespace "; 136 NamespaceFix += (*I)->getName(); 137 } 138 139 std::string RBraces; 140 for (unsigned i = 0, e = ExtraIdent.size(); i != e; ++i) 141 RBraces += "} "; 142 143 Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) 144 << FixItHint::CreateReplacement(SourceRange(ExtraNamespaceLoc.front(), 145 ExtraIdentLoc.back()), 146 NamespaceFix) 147 << FixItHint::CreateInsertion(rBraceToken.getLocation(), RBraces); 148 } 149 } 150 151 // If we're still good, complain about inline namespaces in non-C++0x now. 152 if (InlineLoc.isValid()) 153 Diag(InlineLoc, getLangOpts().CPlusPlus0x ? 154 diag::warn_cxx98_compat_inline_namespace : diag::ext_inline_namespace); 155 156 // Enter a scope for the namespace. 157 ParseScope NamespaceScope(this, Scope::DeclScope); 158 159 Decl *NamespcDecl = 160 Actions.ActOnStartNamespaceDef(getCurScope(), InlineLoc, NamespaceLoc, 161 IdentLoc, Ident, T.getOpenLocation(), 162 attrs.getList()); 163 164 PrettyDeclStackTraceEntry CrashInfo(Actions, NamespcDecl, NamespaceLoc, 165 "parsing namespace"); 166 167 // Parse the contents of the namespace. This includes parsing recovery on 168 // any improperly nested namespaces. 169 ParseInnerNamespace(ExtraIdentLoc, ExtraIdent, ExtraNamespaceLoc, 0, 170 InlineLoc, attrs, T); 171 172 // Leave the namespace scope. 173 NamespaceScope.Exit(); 174 175 DeclEnd = T.getCloseLocation(); 176 Actions.ActOnFinishNamespaceDef(NamespcDecl, DeclEnd); 177 178 return NamespcDecl; 179} 180 181/// ParseInnerNamespace - Parse the contents of a namespace. 182void Parser::ParseInnerNamespace(std::vector<SourceLocation>& IdentLoc, 183 std::vector<IdentifierInfo*>& Ident, 184 std::vector<SourceLocation>& NamespaceLoc, 185 unsigned int index, SourceLocation& InlineLoc, 186 ParsedAttributes& attrs, 187 BalancedDelimiterTracker &Tracker) { 188 if (index == Ident.size()) { 189 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 190 ParsedAttributesWithRange attrs(AttrFactory); 191 MaybeParseCXX0XAttributes(attrs); 192 MaybeParseMicrosoftAttributes(attrs); 193 ParseExternalDeclaration(attrs); 194 } 195 196 // The caller is what called check -- we are simply calling 197 // the close for it. 198 Tracker.consumeClose(); 199 200 return; 201 } 202 203 // Parse improperly nested namespaces. 204 ParseScope NamespaceScope(this, Scope::DeclScope); 205 Decl *NamespcDecl = 206 Actions.ActOnStartNamespaceDef(getCurScope(), SourceLocation(), 207 NamespaceLoc[index], IdentLoc[index], 208 Ident[index], Tracker.getOpenLocation(), 209 attrs.getList()); 210 211 ParseInnerNamespace(IdentLoc, Ident, NamespaceLoc, ++index, InlineLoc, 212 attrs, Tracker); 213 214 NamespaceScope.Exit(); 215 216 Actions.ActOnFinishNamespaceDef(NamespcDecl, Tracker.getCloseLocation()); 217} 218 219/// ParseNamespaceAlias - Parse the part after the '=' in a namespace 220/// alias definition. 221/// 222Decl *Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc, 223 SourceLocation AliasLoc, 224 IdentifierInfo *Alias, 225 SourceLocation &DeclEnd) { 226 assert(Tok.is(tok::equal) && "Not equal token"); 227 228 ConsumeToken(); // eat the '='. 229 230 if (Tok.is(tok::code_completion)) { 231 Actions.CodeCompleteNamespaceAliasDecl(getCurScope()); 232 cutOffParsing(); 233 return 0; 234 } 235 236 CXXScopeSpec SS; 237 // Parse (optional) nested-name-specifier. 238 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 239 240 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 241 Diag(Tok, diag::err_expected_namespace_name); 242 // Skip to end of the definition and eat the ';'. 243 SkipUntil(tok::semi); 244 return 0; 245 } 246 247 // Parse identifier. 248 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 249 SourceLocation IdentLoc = ConsumeToken(); 250 251 // Eat the ';'. 252 DeclEnd = Tok.getLocation(); 253 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name, 254 "", tok::semi); 255 256 return Actions.ActOnNamespaceAliasDef(getCurScope(), NamespaceLoc, AliasLoc, Alias, 257 SS, IdentLoc, Ident); 258} 259 260/// ParseLinkage - We know that the current token is a string_literal 261/// and just before that, that extern was seen. 262/// 263/// linkage-specification: [C++ 7.5p2: dcl.link] 264/// 'extern' string-literal '{' declaration-seq[opt] '}' 265/// 'extern' string-literal declaration 266/// 267Decl *Parser::ParseLinkage(ParsingDeclSpec &DS, unsigned Context) { 268 assert(Tok.is(tok::string_literal) && "Not a string literal!"); 269 SmallString<8> LangBuffer; 270 bool Invalid = false; 271 StringRef Lang = PP.getSpelling(Tok, LangBuffer, &Invalid); 272 if (Invalid) 273 return 0; 274 275 // FIXME: This is incorrect: linkage-specifiers are parsed in translation 276 // phase 7, so string-literal concatenation is supposed to occur. 277 // extern "" "C" "" "+" "+" { } is legal. 278 if (Tok.hasUDSuffix()) 279 Diag(Tok, diag::err_invalid_string_udl); 280 SourceLocation Loc = ConsumeStringToken(); 281 282 ParseScope LinkageScope(this, Scope::DeclScope); 283 Decl *LinkageSpec 284 = Actions.ActOnStartLinkageSpecification(getCurScope(), 285 DS.getSourceRange().getBegin(), 286 Loc, Lang, 287 Tok.is(tok::l_brace) ? Tok.getLocation() 288 : SourceLocation()); 289 290 ParsedAttributesWithRange attrs(AttrFactory); 291 MaybeParseCXX0XAttributes(attrs); 292 MaybeParseMicrosoftAttributes(attrs); 293 294 if (Tok.isNot(tok::l_brace)) { 295 // Reset the source range in DS, as the leading "extern" 296 // does not really belong to the inner declaration ... 297 DS.SetRangeStart(SourceLocation()); 298 DS.SetRangeEnd(SourceLocation()); 299 // ... but anyway remember that such an "extern" was seen. 300 DS.setExternInLinkageSpec(true); 301 ParseExternalDeclaration(attrs, &DS); 302 return Actions.ActOnFinishLinkageSpecification(getCurScope(), LinkageSpec, 303 SourceLocation()); 304 } 305 306 DS.abort(); 307 308 ProhibitAttributes(attrs); 309 310 BalancedDelimiterTracker T(*this, tok::l_brace); 311 T.consumeOpen(); 312 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 313 ParsedAttributesWithRange attrs(AttrFactory); 314 MaybeParseCXX0XAttributes(attrs); 315 MaybeParseMicrosoftAttributes(attrs); 316 ParseExternalDeclaration(attrs); 317 } 318 319 T.consumeClose(); 320 return Actions.ActOnFinishLinkageSpecification(getCurScope(), LinkageSpec, 321 T.getCloseLocation()); 322} 323 324/// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or 325/// using-directive. Assumes that current token is 'using'. 326Decl *Parser::ParseUsingDirectiveOrDeclaration(unsigned Context, 327 const ParsedTemplateInfo &TemplateInfo, 328 SourceLocation &DeclEnd, 329 ParsedAttributesWithRange &attrs, 330 Decl **OwnedType) { 331 assert(Tok.is(tok::kw_using) && "Not using token"); 332 ObjCDeclContextSwitch ObjCDC(*this); 333 334 // Eat 'using'. 335 SourceLocation UsingLoc = ConsumeToken(); 336 337 if (Tok.is(tok::code_completion)) { 338 Actions.CodeCompleteUsing(getCurScope()); 339 cutOffParsing(); 340 return 0; 341 } 342 343 // 'using namespace' means this is a using-directive. 344 if (Tok.is(tok::kw_namespace)) { 345 // Template parameters are always an error here. 346 if (TemplateInfo.Kind) { 347 SourceRange R = TemplateInfo.getSourceRange(); 348 Diag(UsingLoc, diag::err_templated_using_directive) 349 << R << FixItHint::CreateRemoval(R); 350 } 351 352 return ParseUsingDirective(Context, UsingLoc, DeclEnd, attrs); 353 } 354 355 // Otherwise, it must be a using-declaration or an alias-declaration. 356 357 // Using declarations can't have attributes. 358 ProhibitAttributes(attrs); 359 360 return ParseUsingDeclaration(Context, TemplateInfo, UsingLoc, DeclEnd, 361 AS_none, OwnedType); 362} 363 364/// ParseUsingDirective - Parse C++ using-directive, assumes 365/// that current token is 'namespace' and 'using' was already parsed. 366/// 367/// using-directive: [C++ 7.3.p4: namespace.udir] 368/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 369/// namespace-name ; 370/// [GNU] using-directive: 371/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 372/// namespace-name attributes[opt] ; 373/// 374Decl *Parser::ParseUsingDirective(unsigned Context, 375 SourceLocation UsingLoc, 376 SourceLocation &DeclEnd, 377 ParsedAttributes &attrs) { 378 assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token"); 379 380 // Eat 'namespace'. 381 SourceLocation NamespcLoc = ConsumeToken(); 382 383 if (Tok.is(tok::code_completion)) { 384 Actions.CodeCompleteUsingDirective(getCurScope()); 385 cutOffParsing(); 386 return 0; 387 } 388 389 CXXScopeSpec SS; 390 // Parse (optional) nested-name-specifier. 391 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 392 393 IdentifierInfo *NamespcName = 0; 394 SourceLocation IdentLoc = SourceLocation(); 395 396 // Parse namespace-name. 397 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 398 Diag(Tok, diag::err_expected_namespace_name); 399 // If there was invalid namespace name, skip to end of decl, and eat ';'. 400 SkipUntil(tok::semi); 401 // FIXME: Are there cases, when we would like to call ActOnUsingDirective? 402 return 0; 403 } 404 405 // Parse identifier. 406 NamespcName = Tok.getIdentifierInfo(); 407 IdentLoc = ConsumeToken(); 408 409 // Parse (optional) attributes (most likely GNU strong-using extension). 410 bool GNUAttr = false; 411 if (Tok.is(tok::kw___attribute)) { 412 GNUAttr = true; 413 ParseGNUAttributes(attrs); 414 } 415 416 // Eat ';'. 417 DeclEnd = Tok.getLocation(); 418 ExpectAndConsume(tok::semi, 419 GNUAttr ? diag::err_expected_semi_after_attribute_list 420 : diag::err_expected_semi_after_namespace_name, 421 "", tok::semi); 422 423 return Actions.ActOnUsingDirective(getCurScope(), UsingLoc, NamespcLoc, SS, 424 IdentLoc, NamespcName, attrs.getList()); 425} 426 427/// ParseUsingDeclaration - Parse C++ using-declaration or alias-declaration. 428/// Assumes that 'using' was already seen. 429/// 430/// using-declaration: [C++ 7.3.p3: namespace.udecl] 431/// 'using' 'typename'[opt] ::[opt] nested-name-specifier 432/// unqualified-id 433/// 'using' :: unqualified-id 434/// 435/// alias-declaration: C++0x [decl.typedef]p2 436/// 'using' identifier = type-id ; 437/// 438Decl *Parser::ParseUsingDeclaration(unsigned Context, 439 const ParsedTemplateInfo &TemplateInfo, 440 SourceLocation UsingLoc, 441 SourceLocation &DeclEnd, 442 AccessSpecifier AS, 443 Decl **OwnedType) { 444 CXXScopeSpec SS; 445 SourceLocation TypenameLoc; 446 bool IsTypeName; 447 448 // Ignore optional 'typename'. 449 // FIXME: This is wrong; we should parse this as a typename-specifier. 450 if (Tok.is(tok::kw_typename)) { 451 TypenameLoc = Tok.getLocation(); 452 ConsumeToken(); 453 IsTypeName = true; 454 } 455 else 456 IsTypeName = false; 457 458 // Parse nested-name-specifier. 459 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 460 461 // Check nested-name specifier. 462 if (SS.isInvalid()) { 463 SkipUntil(tok::semi); 464 return 0; 465 } 466 467 // Parse the unqualified-id. We allow parsing of both constructor and 468 // destructor names and allow the action module to diagnose any semantic 469 // errors. 470 SourceLocation TemplateKWLoc; 471 UnqualifiedId Name; 472 if (ParseUnqualifiedId(SS, 473 /*EnteringContext=*/false, 474 /*AllowDestructorName=*/true, 475 /*AllowConstructorName=*/true, 476 ParsedType(), 477 TemplateKWLoc, 478 Name)) { 479 SkipUntil(tok::semi); 480 return 0; 481 } 482 483 ParsedAttributes attrs(AttrFactory); 484 485 // Maybe this is an alias-declaration. 486 bool IsAliasDecl = Tok.is(tok::equal); 487 TypeResult TypeAlias; 488 if (IsAliasDecl) { 489 // TODO: Attribute support. C++0x attributes may appear before the equals. 490 // Where can GNU attributes appear? 491 ConsumeToken(); 492 493 Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ? 494 diag::warn_cxx98_compat_alias_declaration : 495 diag::ext_alias_declaration); 496 497 // Type alias templates cannot be specialized. 498 int SpecKind = -1; 499 if (TemplateInfo.Kind == ParsedTemplateInfo::Template && 500 Name.getKind() == UnqualifiedId::IK_TemplateId) 501 SpecKind = 0; 502 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization) 503 SpecKind = 1; 504 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 505 SpecKind = 2; 506 if (SpecKind != -1) { 507 SourceRange Range; 508 if (SpecKind == 0) 509 Range = SourceRange(Name.TemplateId->LAngleLoc, 510 Name.TemplateId->RAngleLoc); 511 else 512 Range = TemplateInfo.getSourceRange(); 513 Diag(Range.getBegin(), diag::err_alias_declaration_specialization) 514 << SpecKind << Range; 515 SkipUntil(tok::semi); 516 return 0; 517 } 518 519 // Name must be an identifier. 520 if (Name.getKind() != UnqualifiedId::IK_Identifier) { 521 Diag(Name.StartLocation, diag::err_alias_declaration_not_identifier); 522 // No removal fixit: can't recover from this. 523 SkipUntil(tok::semi); 524 return 0; 525 } else if (IsTypeName) 526 Diag(TypenameLoc, diag::err_alias_declaration_not_identifier) 527 << FixItHint::CreateRemoval(SourceRange(TypenameLoc, 528 SS.isNotEmpty() ? SS.getEndLoc() : TypenameLoc)); 529 else if (SS.isNotEmpty()) 530 Diag(SS.getBeginLoc(), diag::err_alias_declaration_not_identifier) 531 << FixItHint::CreateRemoval(SS.getRange()); 532 533 TypeAlias = ParseTypeName(0, TemplateInfo.Kind ? 534 Declarator::AliasTemplateContext : 535 Declarator::AliasDeclContext, AS, OwnedType); 536 } else 537 // Parse (optional) attributes (most likely GNU strong-using extension). 538 MaybeParseGNUAttributes(attrs); 539 540 // Eat ';'. 541 DeclEnd = Tok.getLocation(); 542 ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 543 !attrs.empty() ? "attributes list" : 544 IsAliasDecl ? "alias declaration" : "using declaration", 545 tok::semi); 546 547 // Diagnose an attempt to declare a templated using-declaration. 548 // In C++0x, alias-declarations can be templates: 549 // template <...> using id = type; 550 if (TemplateInfo.Kind && !IsAliasDecl) { 551 SourceRange R = TemplateInfo.getSourceRange(); 552 Diag(UsingLoc, diag::err_templated_using_declaration) 553 << R << FixItHint::CreateRemoval(R); 554 555 // Unfortunately, we have to bail out instead of recovering by 556 // ignoring the parameters, just in case the nested name specifier 557 // depends on the parameters. 558 return 0; 559 } 560 561 // "typename" keyword is allowed for identifiers only, 562 // because it may be a type definition. 563 if (IsTypeName && Name.getKind() != UnqualifiedId::IK_Identifier) { 564 Diag(Name.getSourceRange().getBegin(), diag::err_typename_identifiers_only) 565 << FixItHint::CreateRemoval(SourceRange(TypenameLoc)); 566 // Proceed parsing, but reset the IsTypeName flag. 567 IsTypeName = false; 568 } 569 570 if (IsAliasDecl) { 571 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 572 MultiTemplateParamsArg TemplateParamsArg(Actions, 573 TemplateParams ? TemplateParams->data() : 0, 574 TemplateParams ? TemplateParams->size() : 0); 575 return Actions.ActOnAliasDeclaration(getCurScope(), AS, TemplateParamsArg, 576 UsingLoc, Name, TypeAlias); 577 } 578 579 return Actions.ActOnUsingDeclaration(getCurScope(), AS, true, UsingLoc, SS, 580 Name, attrs.getList(), 581 IsTypeName, TypenameLoc); 582} 583 584/// ParseStaticAssertDeclaration - Parse C++0x or C11 static_assert-declaration. 585/// 586/// [C++0x] static_assert-declaration: 587/// static_assert ( constant-expression , string-literal ) ; 588/// 589/// [C11] static_assert-declaration: 590/// _Static_assert ( constant-expression , string-literal ) ; 591/// 592Decl *Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){ 593 assert((Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) && 594 "Not a static_assert declaration"); 595 596 if (Tok.is(tok::kw__Static_assert) && !getLangOpts().C11) 597 Diag(Tok, diag::ext_c11_static_assert); 598 if (Tok.is(tok::kw_static_assert)) 599 Diag(Tok, diag::warn_cxx98_compat_static_assert); 600 601 SourceLocation StaticAssertLoc = ConsumeToken(); 602 603 BalancedDelimiterTracker T(*this, tok::l_paren); 604 if (T.consumeOpen()) { 605 Diag(Tok, diag::err_expected_lparen); 606 return 0; 607 } 608 609 ExprResult AssertExpr(ParseConstantExpression()); 610 if (AssertExpr.isInvalid()) { 611 SkipUntil(tok::semi); 612 return 0; 613 } 614 615 if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi)) 616 return 0; 617 618 if (!isTokenStringLiteral()) { 619 Diag(Tok, diag::err_expected_string_literal); 620 SkipUntil(tok::semi); 621 return 0; 622 } 623 624 ExprResult AssertMessage(ParseStringLiteralExpression()); 625 if (AssertMessage.isInvalid()) { 626 SkipUntil(tok::semi); 627 return 0; 628 } 629 630 T.consumeClose(); 631 632 DeclEnd = Tok.getLocation(); 633 ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert); 634 635 return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, 636 AssertExpr.take(), 637 AssertMessage.take(), 638 T.getCloseLocation()); 639} 640 641/// ParseDecltypeSpecifier - Parse a C++0x decltype specifier. 642/// 643/// 'decltype' ( expression ) 644/// 645SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) { 646 assert((Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) 647 && "Not a decltype specifier"); 648 649 650 ExprResult Result; 651 SourceLocation StartLoc = Tok.getLocation(); 652 SourceLocation EndLoc; 653 654 if (Tok.is(tok::annot_decltype)) { 655 Result = getExprAnnotation(Tok); 656 EndLoc = Tok.getAnnotationEndLoc(); 657 ConsumeToken(); 658 if (Result.isInvalid()) { 659 DS.SetTypeSpecError(); 660 return EndLoc; 661 } 662 } else { 663 if (Tok.getIdentifierInfo()->isStr("decltype")) 664 Diag(Tok, diag::warn_cxx98_compat_decltype); 665 666 ConsumeToken(); 667 668 BalancedDelimiterTracker T(*this, tok::l_paren); 669 if (T.expectAndConsume(diag::err_expected_lparen_after, 670 "decltype", tok::r_paren)) { 671 DS.SetTypeSpecError(); 672 return T.getOpenLocation() == Tok.getLocation() ? 673 StartLoc : T.getOpenLocation(); 674 } 675 676 // Parse the expression 677 678 // C++0x [dcl.type.simple]p4: 679 // The operand of the decltype specifier is an unevaluated operand. 680 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated, 681 0, /*IsDecltype=*/true); 682 Result = ParseExpression(); 683 if (Result.isInvalid()) { 684 SkipUntil(tok::r_paren); 685 DS.SetTypeSpecError(); 686 return StartLoc; 687 } 688 689 // Match the ')' 690 T.consumeClose(); 691 if (T.getCloseLocation().isInvalid()) { 692 DS.SetTypeSpecError(); 693 // FIXME: this should return the location of the last token 694 // that was consumed (by "consumeClose()") 695 return T.getCloseLocation(); 696 } 697 698 Result = Actions.ActOnDecltypeExpression(Result.take()); 699 if (Result.isInvalid()) { 700 DS.SetTypeSpecError(); 701 return T.getCloseLocation(); 702 } 703 704 EndLoc = T.getCloseLocation(); 705 } 706 707 const char *PrevSpec = 0; 708 unsigned DiagID; 709 // Check for duplicate type specifiers (e.g. "int decltype(a)"). 710 if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec, 711 DiagID, Result.release())) { 712 Diag(StartLoc, DiagID) << PrevSpec; 713 DS.SetTypeSpecError(); 714 } 715 return EndLoc; 716} 717 718void Parser::AnnotateExistingDecltypeSpecifier(const DeclSpec& DS, 719 SourceLocation StartLoc, 720 SourceLocation EndLoc) { 721 // make sure we have a token we can turn into an annotation token 722 if (PP.isBacktrackEnabled()) 723 PP.RevertCachedTokens(1); 724 else 725 PP.EnterToken(Tok); 726 727 Tok.setKind(tok::annot_decltype); 728 setExprAnnotation(Tok, DS.getTypeSpecType() == TST_decltype ? 729 DS.getRepAsExpr() : ExprResult()); 730 Tok.setAnnotationEndLoc(EndLoc); 731 Tok.setLocation(StartLoc); 732 PP.AnnotateCachedTokens(Tok); 733} 734 735void Parser::ParseUnderlyingTypeSpecifier(DeclSpec &DS) { 736 assert(Tok.is(tok::kw___underlying_type) && 737 "Not an underlying type specifier"); 738 739 SourceLocation StartLoc = ConsumeToken(); 740 BalancedDelimiterTracker T(*this, tok::l_paren); 741 if (T.expectAndConsume(diag::err_expected_lparen_after, 742 "__underlying_type", tok::r_paren)) { 743 return; 744 } 745 746 TypeResult Result = ParseTypeName(); 747 if (Result.isInvalid()) { 748 SkipUntil(tok::r_paren); 749 return; 750 } 751 752 // Match the ')' 753 T.consumeClose(); 754 if (T.getCloseLocation().isInvalid()) 755 return; 756 757 const char *PrevSpec = 0; 758 unsigned DiagID; 759 if (DS.SetTypeSpecType(DeclSpec::TST_underlyingType, StartLoc, PrevSpec, 760 DiagID, Result.release())) 761 Diag(StartLoc, DiagID) << PrevSpec; 762} 763 764/// ParseBaseTypeSpecifier - Parse a C++ base-type-specifier which is either a 765/// class name or decltype-specifier. Note that we only check that the result 766/// names a type; semantic analysis will need to verify that the type names a 767/// class. The result is either a type or null, depending on whether a type 768/// name was found. 769/// 770/// base-type-specifier: [C++ 10.1] 771/// class-or-decltype 772/// class-or-decltype: [C++ 10.1] 773/// nested-name-specifier[opt] class-name 774/// decltype-specifier 775/// class-name: [C++ 9.1] 776/// identifier 777/// simple-template-id 778/// 779Parser::TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc, 780 SourceLocation &EndLocation) { 781 // Ignore attempts to use typename 782 if (Tok.is(tok::kw_typename)) { 783 Diag(Tok, diag::err_expected_class_name_not_template) 784 << FixItHint::CreateRemoval(Tok.getLocation()); 785 ConsumeToken(); 786 } 787 788 // Parse optional nested-name-specifier 789 CXXScopeSpec SS; 790 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 791 792 BaseLoc = Tok.getLocation(); 793 794 // Parse decltype-specifier 795 // tok == kw_decltype is just error recovery, it can only happen when SS 796 // isn't empty 797 if (Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) { 798 if (SS.isNotEmpty()) 799 Diag(SS.getBeginLoc(), diag::err_unexpected_scope_on_base_decltype) 800 << FixItHint::CreateRemoval(SS.getRange()); 801 // Fake up a Declarator to use with ActOnTypeName. 802 DeclSpec DS(AttrFactory); 803 804 EndLocation = ParseDecltypeSpecifier(DS); 805 806 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 807 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 808 } 809 810 // Check whether we have a template-id that names a type. 811 if (Tok.is(tok::annot_template_id)) { 812 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 813 if (TemplateId->Kind == TNK_Type_template || 814 TemplateId->Kind == TNK_Dependent_template_name) { 815 AnnotateTemplateIdTokenAsType(); 816 817 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 818 ParsedType Type = getTypeAnnotation(Tok); 819 EndLocation = Tok.getAnnotationEndLoc(); 820 ConsumeToken(); 821 822 if (Type) 823 return Type; 824 return true; 825 } 826 827 // Fall through to produce an error below. 828 } 829 830 if (Tok.isNot(tok::identifier)) { 831 Diag(Tok, diag::err_expected_class_name); 832 return true; 833 } 834 835 IdentifierInfo *Id = Tok.getIdentifierInfo(); 836 SourceLocation IdLoc = ConsumeToken(); 837 838 if (Tok.is(tok::less)) { 839 // It looks the user intended to write a template-id here, but the 840 // template-name was wrong. Try to fix that. 841 TemplateNameKind TNK = TNK_Type_template; 842 TemplateTy Template; 843 if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, getCurScope(), 844 &SS, Template, TNK)) { 845 Diag(IdLoc, diag::err_unknown_template_name) 846 << Id; 847 } 848 849 if (!Template) 850 return true; 851 852 // Form the template name 853 UnqualifiedId TemplateName; 854 TemplateName.setIdentifier(Id, IdLoc); 855 856 // Parse the full template-id, then turn it into a type. 857 if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(), 858 TemplateName, true)) 859 return true; 860 if (TNK == TNK_Dependent_template_name) 861 AnnotateTemplateIdTokenAsType(); 862 863 // If we didn't end up with a typename token, there's nothing more we 864 // can do. 865 if (Tok.isNot(tok::annot_typename)) 866 return true; 867 868 // Retrieve the type from the annotation token, consume that token, and 869 // return. 870 EndLocation = Tok.getAnnotationEndLoc(); 871 ParsedType Type = getTypeAnnotation(Tok); 872 ConsumeToken(); 873 return Type; 874 } 875 876 // We have an identifier; check whether it is actually a type. 877 ParsedType Type = Actions.getTypeName(*Id, IdLoc, getCurScope(), &SS, true, 878 false, ParsedType(), 879 /*IsCtorOrDtorName=*/false, 880 /*NonTrivialTypeSourceInfo=*/true); 881 if (!Type) { 882 Diag(IdLoc, diag::err_expected_class_name); 883 return true; 884 } 885 886 // Consume the identifier. 887 EndLocation = IdLoc; 888 889 // Fake up a Declarator to use with ActOnTypeName. 890 DeclSpec DS(AttrFactory); 891 DS.SetRangeStart(IdLoc); 892 DS.SetRangeEnd(EndLocation); 893 DS.getTypeSpecScope() = SS; 894 895 const char *PrevSpec = 0; 896 unsigned DiagID; 897 DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type); 898 899 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 900 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 901} 902 903void Parser::ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs) { 904 while (Tok.is(tok::kw___single_inheritance) || 905 Tok.is(tok::kw___multiple_inheritance) || 906 Tok.is(tok::kw___virtual_inheritance)) { 907 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 908 SourceLocation AttrNameLoc = ConsumeToken(); 909 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 910 SourceLocation(), 0, 0, AttributeList::AS_GNU); 911 } 912} 913 914/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or 915/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which 916/// until we reach the start of a definition or see a token that 917/// cannot start a definition. 918/// 919/// class-specifier: [C++ class] 920/// class-head '{' member-specification[opt] '}' 921/// class-head '{' member-specification[opt] '}' attributes[opt] 922/// class-head: 923/// class-key identifier[opt] base-clause[opt] 924/// class-key nested-name-specifier identifier base-clause[opt] 925/// class-key nested-name-specifier[opt] simple-template-id 926/// base-clause[opt] 927/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] 928/// [GNU] class-key attributes[opt] nested-name-specifier 929/// identifier base-clause[opt] 930/// [GNU] class-key attributes[opt] nested-name-specifier[opt] 931/// simple-template-id base-clause[opt] 932/// class-key: 933/// 'class' 934/// 'struct' 935/// 'union' 936/// 937/// elaborated-type-specifier: [C++ dcl.type.elab] 938/// class-key ::[opt] nested-name-specifier[opt] identifier 939/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] 940/// simple-template-id 941/// 942/// Note that the C++ class-specifier and elaborated-type-specifier, 943/// together, subsume the C99 struct-or-union-specifier: 944/// 945/// struct-or-union-specifier: [C99 6.7.2.1] 946/// struct-or-union identifier[opt] '{' struct-contents '}' 947/// struct-or-union identifier 948/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents 949/// '}' attributes[opt] 950/// [GNU] struct-or-union attributes[opt] identifier 951/// struct-or-union: 952/// 'struct' 953/// 'union' 954void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, 955 SourceLocation StartLoc, DeclSpec &DS, 956 const ParsedTemplateInfo &TemplateInfo, 957 AccessSpecifier AS, 958 bool EnteringContext, DeclSpecContext DSC) { 959 DeclSpec::TST TagType; 960 if (TagTokKind == tok::kw_struct) 961 TagType = DeclSpec::TST_struct; 962 else if (TagTokKind == tok::kw_class) 963 TagType = DeclSpec::TST_class; 964 else { 965 assert(TagTokKind == tok::kw_union && "Not a class specifier"); 966 TagType = DeclSpec::TST_union; 967 } 968 969 if (Tok.is(tok::code_completion)) { 970 // Code completion for a struct, class, or union name. 971 Actions.CodeCompleteTag(getCurScope(), TagType); 972 return cutOffParsing(); 973 } 974 975 // C++03 [temp.explicit] 14.7.2/8: 976 // The usual access checking rules do not apply to names used to specify 977 // explicit instantiations. 978 // 979 // As an extension we do not perform access checking on the names used to 980 // specify explicit specializations either. This is important to allow 981 // specializing traits classes for private types. 982 // 983 // Note that we don't suppress if this turns out to be an elaborated 984 // type specifier. 985 bool shouldDelayDiagsInTag = 986 (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation || 987 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization); 988 SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag); 989 990 ParsedAttributes attrs(AttrFactory); 991 // If attributes exist after tag, parse them. 992 if (Tok.is(tok::kw___attribute)) 993 ParseGNUAttributes(attrs); 994 995 // If declspecs exist after tag, parse them. 996 while (Tok.is(tok::kw___declspec)) 997 ParseMicrosoftDeclSpec(attrs); 998 999 // Parse inheritance specifiers. 1000 if (Tok.is(tok::kw___single_inheritance) || 1001 Tok.is(tok::kw___multiple_inheritance) || 1002 Tok.is(tok::kw___virtual_inheritance)) 1003 ParseMicrosoftInheritanceClassAttributes(attrs); 1004 1005 // If C++0x attributes exist here, parse them. 1006 // FIXME: Are we consistent with the ordering of parsing of different 1007 // styles of attributes? 1008 MaybeParseCXX0XAttributes(attrs); 1009 1010 if (TagType == DeclSpec::TST_struct && 1011 !Tok.is(tok::identifier) && 1012 Tok.getIdentifierInfo() && 1013 (Tok.is(tok::kw___is_arithmetic) || 1014 Tok.is(tok::kw___is_convertible) || 1015 Tok.is(tok::kw___is_empty) || 1016 Tok.is(tok::kw___is_floating_point) || 1017 Tok.is(tok::kw___is_function) || 1018 Tok.is(tok::kw___is_fundamental) || 1019 Tok.is(tok::kw___is_integral) || 1020 Tok.is(tok::kw___is_member_function_pointer) || 1021 Tok.is(tok::kw___is_member_pointer) || 1022 Tok.is(tok::kw___is_pod) || 1023 Tok.is(tok::kw___is_pointer) || 1024 Tok.is(tok::kw___is_same) || 1025 Tok.is(tok::kw___is_scalar) || 1026 Tok.is(tok::kw___is_signed) || 1027 Tok.is(tok::kw___is_unsigned) || 1028 Tok.is(tok::kw___is_void))) { 1029 // GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the 1030 // name of struct templates, but some are keywords in GCC >= 4.3 1031 // and Clang. Therefore, when we see the token sequence "struct 1032 // X", make X into a normal identifier rather than a keyword, to 1033 // allow libstdc++ 4.2 and libc++ to work properly. 1034 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier(); 1035 Tok.setKind(tok::identifier); 1036 } 1037 1038 // Parse the (optional) nested-name-specifier. 1039 CXXScopeSpec &SS = DS.getTypeSpecScope(); 1040 if (getLangOpts().CPlusPlus) { 1041 // "FOO : BAR" is not a potential typo for "FOO::BAR". 1042 ColonProtectionRAIIObject X(*this); 1043 1044 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext)) 1045 DS.SetTypeSpecError(); 1046 if (SS.isSet()) 1047 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) 1048 Diag(Tok, diag::err_expected_ident); 1049 } 1050 1051 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 1052 1053 // Parse the (optional) class name or simple-template-id. 1054 IdentifierInfo *Name = 0; 1055 SourceLocation NameLoc; 1056 TemplateIdAnnotation *TemplateId = 0; 1057 if (Tok.is(tok::identifier)) { 1058 Name = Tok.getIdentifierInfo(); 1059 NameLoc = ConsumeToken(); 1060 1061 if (Tok.is(tok::less) && getLangOpts().CPlusPlus) { 1062 // The name was supposed to refer to a template, but didn't. 1063 // Eat the template argument list and try to continue parsing this as 1064 // a class (or template thereof). 1065 TemplateArgList TemplateArgs; 1066 SourceLocation LAngleLoc, RAngleLoc; 1067 if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, SS, 1068 true, LAngleLoc, 1069 TemplateArgs, RAngleLoc)) { 1070 // We couldn't parse the template argument list at all, so don't 1071 // try to give any location information for the list. 1072 LAngleLoc = RAngleLoc = SourceLocation(); 1073 } 1074 1075 Diag(NameLoc, diag::err_explicit_spec_non_template) 1076 << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 1077 << (TagType == DeclSpec::TST_class? 0 1078 : TagType == DeclSpec::TST_struct? 1 1079 : 2) 1080 << Name 1081 << SourceRange(LAngleLoc, RAngleLoc); 1082 1083 // Strip off the last template parameter list if it was empty, since 1084 // we've removed its template argument list. 1085 if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) { 1086 if (TemplateParams && TemplateParams->size() > 1) { 1087 TemplateParams->pop_back(); 1088 } else { 1089 TemplateParams = 0; 1090 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1091 = ParsedTemplateInfo::NonTemplate; 1092 } 1093 } else if (TemplateInfo.Kind 1094 == ParsedTemplateInfo::ExplicitInstantiation) { 1095 // Pretend this is just a forward declaration. 1096 TemplateParams = 0; 1097 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1098 = ParsedTemplateInfo::NonTemplate; 1099 const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc 1100 = SourceLocation(); 1101 const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc 1102 = SourceLocation(); 1103 } 1104 } 1105 } else if (Tok.is(tok::annot_template_id)) { 1106 TemplateId = takeTemplateIdAnnotation(Tok); 1107 NameLoc = ConsumeToken(); 1108 1109 if (TemplateId->Kind != TNK_Type_template && 1110 TemplateId->Kind != TNK_Dependent_template_name) { 1111 // The template-name in the simple-template-id refers to 1112 // something other than a class template. Give an appropriate 1113 // error message and skip to the ';'. 1114 SourceRange Range(NameLoc); 1115 if (SS.isNotEmpty()) 1116 Range.setBegin(SS.getBeginLoc()); 1117 1118 Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) 1119 << Name << static_cast<int>(TemplateId->Kind) << Range; 1120 1121 DS.SetTypeSpecError(); 1122 SkipUntil(tok::semi, false, true); 1123 return; 1124 } 1125 } 1126 1127 // There are four options here. 1128 // - If we are in a trailing return type, this is always just a reference, 1129 // and we must not try to parse a definition. For instance, 1130 // [] () -> struct S { }; 1131 // does not define a type. 1132 // - If we have 'struct foo {...', 'struct foo :...', 1133 // 'struct foo final :' or 'struct foo final {', then this is a definition. 1134 // - If we have 'struct foo;', then this is either a forward declaration 1135 // or a friend declaration, which have to be treated differently. 1136 // - Otherwise we have something like 'struct foo xyz', a reference. 1137 // However, in type-specifier-seq's, things look like declarations but are 1138 // just references, e.g. 1139 // new struct s; 1140 // or 1141 // &T::operator struct s; 1142 // For these, DSC is DSC_type_specifier. 1143 Sema::TagUseKind TUK; 1144 if (DSC == DSC_trailing) 1145 TUK = Sema::TUK_Reference; 1146 else if (Tok.is(tok::l_brace) || 1147 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1148 (isCXX0XFinalKeyword() && 1149 (NextToken().is(tok::l_brace) || NextToken().is(tok::colon)))) { 1150 if (DS.isFriendSpecified()) { 1151 // C++ [class.friend]p2: 1152 // A class shall not be defined in a friend declaration. 1153 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type) 1154 << SourceRange(DS.getFriendSpecLoc()); 1155 1156 // Skip everything up to the semicolon, so that this looks like a proper 1157 // friend class (or template thereof) declaration. 1158 SkipUntil(tok::semi, true, true); 1159 TUK = Sema::TUK_Friend; 1160 } else { 1161 // Okay, this is a class definition. 1162 TUK = Sema::TUK_Definition; 1163 } 1164 } else if (Tok.is(tok::semi) && DSC != DSC_type_specifier) 1165 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration; 1166 else 1167 TUK = Sema::TUK_Reference; 1168 1169 // If this is an elaborated type specifier, and we delayed 1170 // diagnostics before, just merge them into the current pool. 1171 if (shouldDelayDiagsInTag) { 1172 diagsFromTag.done(); 1173 if (TUK == Sema::TUK_Reference) 1174 diagsFromTag.redelay(); 1175 } 1176 1177 if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error || 1178 TUK != Sema::TUK_Definition)) { 1179 if (DS.getTypeSpecType() != DeclSpec::TST_error) { 1180 // We have a declaration or reference to an anonymous class. 1181 Diag(StartLoc, diag::err_anon_type_definition) 1182 << DeclSpec::getSpecifierName(TagType); 1183 } 1184 1185 SkipUntil(tok::comma, true); 1186 return; 1187 } 1188 1189 // Create the tag portion of the class or class template. 1190 DeclResult TagOrTempResult = true; // invalid 1191 TypeResult TypeResult = true; // invalid 1192 1193 bool Owned = false; 1194 if (TemplateId) { 1195 // Explicit specialization, class template partial specialization, 1196 // or explicit instantiation. 1197 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 1198 TemplateId->getTemplateArgs(), 1199 TemplateId->NumArgs); 1200 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1201 TUK == Sema::TUK_Declaration) { 1202 // This is an explicit instantiation of a class template. 1203 TagOrTempResult 1204 = Actions.ActOnExplicitInstantiation(getCurScope(), 1205 TemplateInfo.ExternLoc, 1206 TemplateInfo.TemplateLoc, 1207 TagType, 1208 StartLoc, 1209 SS, 1210 TemplateId->Template, 1211 TemplateId->TemplateNameLoc, 1212 TemplateId->LAngleLoc, 1213 TemplateArgsPtr, 1214 TemplateId->RAngleLoc, 1215 attrs.getList()); 1216 1217 // Friend template-ids are treated as references unless 1218 // they have template headers, in which case they're ill-formed 1219 // (FIXME: "template <class T> friend class A<T>::B<int>;"). 1220 // We diagnose this error in ActOnClassTemplateSpecialization. 1221 } else if (TUK == Sema::TUK_Reference || 1222 (TUK == Sema::TUK_Friend && 1223 TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) { 1224 TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc, 1225 TemplateId->SS, 1226 TemplateId->TemplateKWLoc, 1227 TemplateId->Template, 1228 TemplateId->TemplateNameLoc, 1229 TemplateId->LAngleLoc, 1230 TemplateArgsPtr, 1231 TemplateId->RAngleLoc); 1232 } else { 1233 // This is an explicit specialization or a class template 1234 // partial specialization. 1235 TemplateParameterLists FakedParamLists; 1236 1237 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 1238 // This looks like an explicit instantiation, because we have 1239 // something like 1240 // 1241 // template class Foo<X> 1242 // 1243 // but it actually has a definition. Most likely, this was 1244 // meant to be an explicit specialization, but the user forgot 1245 // the '<>' after 'template'. 1246 assert(TUK == Sema::TUK_Definition && "Expected a definition here"); 1247 1248 SourceLocation LAngleLoc 1249 = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 1250 Diag(TemplateId->TemplateNameLoc, 1251 diag::err_explicit_instantiation_with_definition) 1252 << SourceRange(TemplateInfo.TemplateLoc) 1253 << FixItHint::CreateInsertion(LAngleLoc, "<>"); 1254 1255 // Create a fake template parameter list that contains only 1256 // "template<>", so that we treat this construct as a class 1257 // template specialization. 1258 FakedParamLists.push_back( 1259 Actions.ActOnTemplateParameterList(0, SourceLocation(), 1260 TemplateInfo.TemplateLoc, 1261 LAngleLoc, 1262 0, 0, 1263 LAngleLoc)); 1264 TemplateParams = &FakedParamLists; 1265 } 1266 1267 // Build the class template specialization. 1268 TagOrTempResult 1269 = Actions.ActOnClassTemplateSpecialization(getCurScope(), TagType, TUK, 1270 StartLoc, DS.getModulePrivateSpecLoc(), SS, 1271 TemplateId->Template, 1272 TemplateId->TemplateNameLoc, 1273 TemplateId->LAngleLoc, 1274 TemplateArgsPtr, 1275 TemplateId->RAngleLoc, 1276 attrs.getList(), 1277 MultiTemplateParamsArg(Actions, 1278 TemplateParams? &(*TemplateParams)[0] : 0, 1279 TemplateParams? TemplateParams->size() : 0)); 1280 } 1281 } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1282 TUK == Sema::TUK_Declaration) { 1283 // Explicit instantiation of a member of a class template 1284 // specialization, e.g., 1285 // 1286 // template struct Outer<int>::Inner; 1287 // 1288 TagOrTempResult 1289 = Actions.ActOnExplicitInstantiation(getCurScope(), 1290 TemplateInfo.ExternLoc, 1291 TemplateInfo.TemplateLoc, 1292 TagType, StartLoc, SS, Name, 1293 NameLoc, attrs.getList()); 1294 } else if (TUK == Sema::TUK_Friend && 1295 TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { 1296 TagOrTempResult = 1297 Actions.ActOnTemplatedFriendTag(getCurScope(), DS.getFriendSpecLoc(), 1298 TagType, StartLoc, SS, 1299 Name, NameLoc, attrs.getList(), 1300 MultiTemplateParamsArg(Actions, 1301 TemplateParams? &(*TemplateParams)[0] : 0, 1302 TemplateParams? TemplateParams->size() : 0)); 1303 } else { 1304 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1305 TUK == Sema::TUK_Definition) { 1306 // FIXME: Diagnose this particular error. 1307 } 1308 1309 bool IsDependent = false; 1310 1311 // Don't pass down template parameter lists if this is just a tag 1312 // reference. For example, we don't need the template parameters here: 1313 // template <class T> class A *makeA(T t); 1314 MultiTemplateParamsArg TParams; 1315 if (TUK != Sema::TUK_Reference && TemplateParams) 1316 TParams = 1317 MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size()); 1318 1319 // Declaration or definition of a class type 1320 TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc, 1321 SS, Name, NameLoc, attrs.getList(), AS, 1322 DS.getModulePrivateSpecLoc(), 1323 TParams, Owned, IsDependent, 1324 SourceLocation(), false, 1325 clang::TypeResult()); 1326 1327 // If ActOnTag said the type was dependent, try again with the 1328 // less common call. 1329 if (IsDependent) { 1330 assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend); 1331 TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK, 1332 SS, Name, StartLoc, NameLoc); 1333 } 1334 } 1335 1336 // If there is a body, parse it and inform the actions module. 1337 if (TUK == Sema::TUK_Definition) { 1338 assert(Tok.is(tok::l_brace) || 1339 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1340 isCXX0XFinalKeyword()); 1341 if (getLangOpts().CPlusPlus) 1342 ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); 1343 else 1344 ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); 1345 } 1346 1347 const char *PrevSpec = 0; 1348 unsigned DiagID; 1349 bool Result; 1350 if (!TypeResult.isInvalid()) { 1351 Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, 1352 NameLoc.isValid() ? NameLoc : StartLoc, 1353 PrevSpec, DiagID, TypeResult.get()); 1354 } else if (!TagOrTempResult.isInvalid()) { 1355 Result = DS.SetTypeSpecType(TagType, StartLoc, 1356 NameLoc.isValid() ? NameLoc : StartLoc, 1357 PrevSpec, DiagID, TagOrTempResult.get(), Owned); 1358 } else { 1359 DS.SetTypeSpecError(); 1360 return; 1361 } 1362 1363 if (Result) 1364 Diag(StartLoc, DiagID) << PrevSpec; 1365 1366 // At this point, we've successfully parsed a class-specifier in 'definition' 1367 // form (e.g. "struct foo { int x; }". While we could just return here, we're 1368 // going to look at what comes after it to improve error recovery. If an 1369 // impossible token occurs next, we assume that the programmer forgot a ; at 1370 // the end of the declaration and recover that way. 1371 // 1372 // This switch enumerates the valid "follow" set for definition. 1373 if (TUK == Sema::TUK_Definition) { 1374 bool ExpectedSemi = true; 1375 switch (Tok.getKind()) { 1376 default: break; 1377 case tok::semi: // struct foo {...} ; 1378 case tok::star: // struct foo {...} * P; 1379 case tok::amp: // struct foo {...} & R = ... 1380 case tok::identifier: // struct foo {...} V ; 1381 case tok::r_paren: //(struct foo {...} ) {4} 1382 case tok::annot_cxxscope: // struct foo {...} a:: b; 1383 case tok::annot_typename: // struct foo {...} a ::b; 1384 case tok::annot_template_id: // struct foo {...} a<int> ::b; 1385 case tok::l_paren: // struct foo {...} ( x); 1386 case tok::comma: // __builtin_offsetof(struct foo{...} , 1387 ExpectedSemi = false; 1388 break; 1389 // Type qualifiers 1390 case tok::kw_const: // struct foo {...} const x; 1391 case tok::kw_volatile: // struct foo {...} volatile x; 1392 case tok::kw_restrict: // struct foo {...} restrict x; 1393 case tok::kw_inline: // struct foo {...} inline foo() {}; 1394 // Storage-class specifiers 1395 case tok::kw_static: // struct foo {...} static x; 1396 case tok::kw_extern: // struct foo {...} extern x; 1397 case tok::kw_typedef: // struct foo {...} typedef x; 1398 case tok::kw_register: // struct foo {...} register x; 1399 case tok::kw_auto: // struct foo {...} auto x; 1400 case tok::kw_mutable: // struct foo {...} mutable x; 1401 case tok::kw_constexpr: // struct foo {...} constexpr x; 1402 // As shown above, type qualifiers and storage class specifiers absolutely 1403 // can occur after class specifiers according to the grammar. However, 1404 // almost no one actually writes code like this. If we see one of these, 1405 // it is much more likely that someone missed a semi colon and the 1406 // type/storage class specifier we're seeing is part of the *next* 1407 // intended declaration, as in: 1408 // 1409 // struct foo { ... } 1410 // typedef int X; 1411 // 1412 // We'd really like to emit a missing semicolon error instead of emitting 1413 // an error on the 'int' saying that you can't have two type specifiers in 1414 // the same declaration of X. Because of this, we look ahead past this 1415 // token to see if it's a type specifier. If so, we know the code is 1416 // otherwise invalid, so we can produce the expected semi error. 1417 if (!isKnownToBeTypeSpecifier(NextToken())) 1418 ExpectedSemi = false; 1419 break; 1420 1421 case tok::r_brace: // struct bar { struct foo {...} } 1422 // Missing ';' at end of struct is accepted as an extension in C mode. 1423 if (!getLangOpts().CPlusPlus) 1424 ExpectedSemi = false; 1425 break; 1426 } 1427 1428 // C++ [temp]p3 In a template-declaration which defines a class, no 1429 // declarator is permitted. 1430 if (TemplateInfo.Kind) 1431 ExpectedSemi = true; 1432 1433 if (ExpectedSemi) { 1434 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl, 1435 TagType == DeclSpec::TST_class ? "class" 1436 : TagType == DeclSpec::TST_struct? "struct" : "union"); 1437 // Push this token back into the preprocessor and change our current token 1438 // to ';' so that the rest of the code recovers as though there were an 1439 // ';' after the definition. 1440 PP.EnterToken(Tok); 1441 Tok.setKind(tok::semi); 1442 } 1443 } 1444} 1445 1446/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. 1447/// 1448/// base-clause : [C++ class.derived] 1449/// ':' base-specifier-list 1450/// base-specifier-list: 1451/// base-specifier '...'[opt] 1452/// base-specifier-list ',' base-specifier '...'[opt] 1453void Parser::ParseBaseClause(Decl *ClassDecl) { 1454 assert(Tok.is(tok::colon) && "Not a base clause"); 1455 ConsumeToken(); 1456 1457 // Build up an array of parsed base specifiers. 1458 SmallVector<CXXBaseSpecifier *, 8> BaseInfo; 1459 1460 while (true) { 1461 // Parse a base-specifier. 1462 BaseResult Result = ParseBaseSpecifier(ClassDecl); 1463 if (Result.isInvalid()) { 1464 // Skip the rest of this base specifier, up until the comma or 1465 // opening brace. 1466 SkipUntil(tok::comma, tok::l_brace, true, true); 1467 } else { 1468 // Add this to our array of base specifiers. 1469 BaseInfo.push_back(Result.get()); 1470 } 1471 1472 // If the next token is a comma, consume it and keep reading 1473 // base-specifiers. 1474 if (Tok.isNot(tok::comma)) break; 1475 1476 // Consume the comma. 1477 ConsumeToken(); 1478 } 1479 1480 // Attach the base specifiers 1481 Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size()); 1482} 1483 1484/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is 1485/// one entry in the base class list of a class specifier, for example: 1486/// class foo : public bar, virtual private baz { 1487/// 'public bar' and 'virtual private baz' are each base-specifiers. 1488/// 1489/// base-specifier: [C++ class.derived] 1490/// ::[opt] nested-name-specifier[opt] class-name 1491/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] 1492/// base-type-specifier 1493/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] 1494/// base-type-specifier 1495Parser::BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) { 1496 bool IsVirtual = false; 1497 SourceLocation StartLoc = Tok.getLocation(); 1498 1499 // Parse the 'virtual' keyword. 1500 if (Tok.is(tok::kw_virtual)) { 1501 ConsumeToken(); 1502 IsVirtual = true; 1503 } 1504 1505 // Parse an (optional) access specifier. 1506 AccessSpecifier Access = getAccessSpecifierIfPresent(); 1507 if (Access != AS_none) 1508 ConsumeToken(); 1509 1510 // Parse the 'virtual' keyword (again!), in case it came after the 1511 // access specifier. 1512 if (Tok.is(tok::kw_virtual)) { 1513 SourceLocation VirtualLoc = ConsumeToken(); 1514 if (IsVirtual) { 1515 // Complain about duplicate 'virtual' 1516 Diag(VirtualLoc, diag::err_dup_virtual) 1517 << FixItHint::CreateRemoval(VirtualLoc); 1518 } 1519 1520 IsVirtual = true; 1521 } 1522 1523 // Parse the class-name. 1524 SourceLocation EndLocation; 1525 SourceLocation BaseLoc; 1526 TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation); 1527 if (BaseType.isInvalid()) 1528 return true; 1529 1530 // Parse the optional ellipsis (for a pack expansion). The ellipsis is 1531 // actually part of the base-specifier-list grammar productions, but we 1532 // parse it here for convenience. 1533 SourceLocation EllipsisLoc; 1534 if (Tok.is(tok::ellipsis)) 1535 EllipsisLoc = ConsumeToken(); 1536 1537 // Find the complete source range for the base-specifier. 1538 SourceRange Range(StartLoc, EndLocation); 1539 1540 // Notify semantic analysis that we have parsed a complete 1541 // base-specifier. 1542 return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, 1543 BaseType.get(), BaseLoc, EllipsisLoc); 1544} 1545 1546/// getAccessSpecifierIfPresent - Determine whether the next token is 1547/// a C++ access-specifier. 1548/// 1549/// access-specifier: [C++ class.derived] 1550/// 'private' 1551/// 'protected' 1552/// 'public' 1553AccessSpecifier Parser::getAccessSpecifierIfPresent() const { 1554 switch (Tok.getKind()) { 1555 default: return AS_none; 1556 case tok::kw_private: return AS_private; 1557 case tok::kw_protected: return AS_protected; 1558 case tok::kw_public: return AS_public; 1559 } 1560} 1561 1562/// \brief If the given declarator has any parts for which parsing has to be 1563/// delayed, e.g., default arguments, create a late-parsed method declaration 1564/// record to handle the parsing at the end of the class definition. 1565void Parser::HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo, 1566 Decl *ThisDecl) { 1567 // We just declared a member function. If this member function 1568 // has any default arguments, we'll need to parse them later. 1569 LateParsedMethodDeclaration *LateMethod = 0; 1570 DeclaratorChunk::FunctionTypeInfo &FTI 1571 = DeclaratorInfo.getFunctionTypeInfo(); 1572 1573 for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { 1574 if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { 1575 if (!LateMethod) { 1576 // Push this method onto the stack of late-parsed method 1577 // declarations. 1578 LateMethod = new LateParsedMethodDeclaration(this, ThisDecl); 1579 getCurrentClass().LateParsedDeclarations.push_back(LateMethod); 1580 LateMethod->TemplateScope = getCurScope()->isTemplateParamScope(); 1581 1582 // Add all of the parameters prior to this one (they don't 1583 // have default arguments). 1584 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 1585 for (unsigned I = 0; I < ParamIdx; ++I) 1586 LateMethod->DefaultArgs.push_back( 1587 LateParsedDefaultArgument(FTI.ArgInfo[I].Param)); 1588 } 1589 1590 // Add this parameter to the list of parameters (it may or may 1591 // not have a default argument). 1592 LateMethod->DefaultArgs.push_back( 1593 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, 1594 FTI.ArgInfo[ParamIdx].DefaultArgTokens)); 1595 } 1596 } 1597} 1598 1599/// isCXX0XVirtSpecifier - Determine whether the given token is a C++0x 1600/// virt-specifier. 1601/// 1602/// virt-specifier: 1603/// override 1604/// final 1605VirtSpecifiers::Specifier Parser::isCXX0XVirtSpecifier(const Token &Tok) const { 1606 if (!getLangOpts().CPlusPlus) 1607 return VirtSpecifiers::VS_None; 1608 1609 if (Tok.is(tok::identifier)) { 1610 IdentifierInfo *II = Tok.getIdentifierInfo(); 1611 1612 // Initialize the contextual keywords. 1613 if (!Ident_final) { 1614 Ident_final = &PP.getIdentifierTable().get("final"); 1615 Ident_override = &PP.getIdentifierTable().get("override"); 1616 } 1617 1618 if (II == Ident_override) 1619 return VirtSpecifiers::VS_Override; 1620 1621 if (II == Ident_final) 1622 return VirtSpecifiers::VS_Final; 1623 } 1624 1625 return VirtSpecifiers::VS_None; 1626} 1627 1628/// ParseOptionalCXX0XVirtSpecifierSeq - Parse a virt-specifier-seq. 1629/// 1630/// virt-specifier-seq: 1631/// virt-specifier 1632/// virt-specifier-seq virt-specifier 1633void Parser::ParseOptionalCXX0XVirtSpecifierSeq(VirtSpecifiers &VS) { 1634 while (true) { 1635 VirtSpecifiers::Specifier Specifier = isCXX0XVirtSpecifier(); 1636 if (Specifier == VirtSpecifiers::VS_None) 1637 return; 1638 1639 // C++ [class.mem]p8: 1640 // A virt-specifier-seq shall contain at most one of each virt-specifier. 1641 const char *PrevSpec = 0; 1642 if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec)) 1643 Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier) 1644 << PrevSpec 1645 << FixItHint::CreateRemoval(Tok.getLocation()); 1646 1647 Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ? 1648 diag::warn_cxx98_compat_override_control_keyword : 1649 diag::ext_override_control_keyword) 1650 << VirtSpecifiers::getSpecifierName(Specifier); 1651 ConsumeToken(); 1652 } 1653} 1654 1655/// isCXX0XFinalKeyword - Determine whether the next token is a C++0x 1656/// contextual 'final' keyword. 1657bool Parser::isCXX0XFinalKeyword() const { 1658 if (!getLangOpts().CPlusPlus) 1659 return false; 1660 1661 if (!Tok.is(tok::identifier)) 1662 return false; 1663 1664 // Initialize the contextual keywords. 1665 if (!Ident_final) { 1666 Ident_final = &PP.getIdentifierTable().get("final"); 1667 Ident_override = &PP.getIdentifierTable().get("override"); 1668 } 1669 1670 return Tok.getIdentifierInfo() == Ident_final; 1671} 1672 1673/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. 1674/// 1675/// member-declaration: 1676/// decl-specifier-seq[opt] member-declarator-list[opt] ';' 1677/// function-definition ';'[opt] 1678/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] 1679/// using-declaration [TODO] 1680/// [C++0x] static_assert-declaration 1681/// template-declaration 1682/// [GNU] '__extension__' member-declaration 1683/// 1684/// member-declarator-list: 1685/// member-declarator 1686/// member-declarator-list ',' member-declarator 1687/// 1688/// member-declarator: 1689/// declarator virt-specifier-seq[opt] pure-specifier[opt] 1690/// declarator constant-initializer[opt] 1691/// [C++11] declarator brace-or-equal-initializer[opt] 1692/// identifier[opt] ':' constant-expression 1693/// 1694/// virt-specifier-seq: 1695/// virt-specifier 1696/// virt-specifier-seq virt-specifier 1697/// 1698/// virt-specifier: 1699/// override 1700/// final 1701/// 1702/// pure-specifier: 1703/// '= 0' 1704/// 1705/// constant-initializer: 1706/// '=' constant-expression 1707/// 1708void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS, 1709 AttributeList *AccessAttrs, 1710 const ParsedTemplateInfo &TemplateInfo, 1711 ParsingDeclRAIIObject *TemplateDiags) { 1712 if (Tok.is(tok::at)) { 1713 if (getLangOpts().ObjC1 && NextToken().isObjCAtKeyword(tok::objc_defs)) 1714 Diag(Tok, diag::err_at_defs_cxx); 1715 else 1716 Diag(Tok, diag::err_at_in_class); 1717 1718 ConsumeToken(); 1719 SkipUntil(tok::r_brace); 1720 return; 1721 } 1722 1723 // Access declarations. 1724 bool MalformedTypeSpec = false; 1725 if (!TemplateInfo.Kind && 1726 (Tok.is(tok::identifier) || Tok.is(tok::coloncolon))) { 1727 if (TryAnnotateCXXScopeToken()) 1728 MalformedTypeSpec = true; 1729 1730 bool isAccessDecl; 1731 if (Tok.isNot(tok::annot_cxxscope)) 1732 isAccessDecl = false; 1733 else if (NextToken().is(tok::identifier)) 1734 isAccessDecl = GetLookAheadToken(2).is(tok::semi); 1735 else 1736 isAccessDecl = NextToken().is(tok::kw_operator); 1737 1738 if (isAccessDecl) { 1739 // Collect the scope specifier token we annotated earlier. 1740 CXXScopeSpec SS; 1741 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), 1742 /*EnteringContext=*/false); 1743 1744 // Try to parse an unqualified-id. 1745 SourceLocation TemplateKWLoc; 1746 UnqualifiedId Name; 1747 if (ParseUnqualifiedId(SS, false, true, true, ParsedType(), 1748 TemplateKWLoc, Name)) { 1749 SkipUntil(tok::semi); 1750 return; 1751 } 1752 1753 // TODO: recover from mistakenly-qualified operator declarations. 1754 if (ExpectAndConsume(tok::semi, 1755 diag::err_expected_semi_after, 1756 "access declaration", 1757 tok::semi)) 1758 return; 1759 1760 Actions.ActOnUsingDeclaration(getCurScope(), AS, 1761 false, SourceLocation(), 1762 SS, Name, 1763 /* AttrList */ 0, 1764 /* IsTypeName */ false, 1765 SourceLocation()); 1766 return; 1767 } 1768 } 1769 1770 // static_assert-declaration 1771 if (Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) { 1772 // FIXME: Check for templates 1773 SourceLocation DeclEnd; 1774 ParseStaticAssertDeclaration(DeclEnd); 1775 return; 1776 } 1777 1778 if (Tok.is(tok::kw_template)) { 1779 assert(!TemplateInfo.TemplateParams && 1780 "Nested template improperly parsed?"); 1781 SourceLocation DeclEnd; 1782 ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd, 1783 AS, AccessAttrs); 1784 return; 1785 } 1786 1787 // Handle: member-declaration ::= '__extension__' member-declaration 1788 if (Tok.is(tok::kw___extension__)) { 1789 // __extension__ silences extension warnings in the subexpression. 1790 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1791 ConsumeToken(); 1792 return ParseCXXClassMemberDeclaration(AS, AccessAttrs, 1793 TemplateInfo, TemplateDiags); 1794 } 1795 1796 // Don't parse FOO:BAR as if it were a typo for FOO::BAR, in this context it 1797 // is a bitfield. 1798 ColonProtectionRAIIObject X(*this); 1799 1800 ParsedAttributesWithRange attrs(AttrFactory); 1801 // Optional C++0x attribute-specifier 1802 MaybeParseCXX0XAttributes(attrs); 1803 MaybeParseMicrosoftAttributes(attrs); 1804 1805 if (Tok.is(tok::kw_using)) { 1806 ProhibitAttributes(attrs); 1807 1808 // Eat 'using'. 1809 SourceLocation UsingLoc = ConsumeToken(); 1810 1811 if (Tok.is(tok::kw_namespace)) { 1812 Diag(UsingLoc, diag::err_using_namespace_in_class); 1813 SkipUntil(tok::semi, true, true); 1814 } else { 1815 SourceLocation DeclEnd; 1816 // Otherwise, it must be a using-declaration or an alias-declaration. 1817 ParseUsingDeclaration(Declarator::MemberContext, TemplateInfo, 1818 UsingLoc, DeclEnd, AS); 1819 } 1820 return; 1821 } 1822 1823 // Hold late-parsed attributes so we can attach a Decl to them later. 1824 LateParsedAttrList CommonLateParsedAttrs; 1825 1826 // decl-specifier-seq: 1827 // Parse the common declaration-specifiers piece. 1828 ParsingDeclSpec DS(*this, TemplateDiags); 1829 DS.takeAttributesFrom(attrs); 1830 if (MalformedTypeSpec) 1831 DS.SetTypeSpecError(); 1832 ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class, 1833 &CommonLateParsedAttrs); 1834 1835 MultiTemplateParamsArg TemplateParams(Actions, 1836 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0, 1837 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); 1838 1839 if (Tok.is(tok::semi)) { 1840 ConsumeToken(); 1841 Decl *TheDecl = 1842 Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS, TemplateParams); 1843 DS.complete(TheDecl); 1844 return; 1845 } 1846 1847 ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); 1848 VirtSpecifiers VS; 1849 1850 // Hold late-parsed attributes so we can attach a Decl to them later. 1851 LateParsedAttrList LateParsedAttrs; 1852 1853 SourceLocation EqualLoc; 1854 bool HasInitializer = false; 1855 ExprResult Init; 1856 if (Tok.isNot(tok::colon)) { 1857 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1858 ColonProtectionRAIIObject X(*this); 1859 1860 // Parse the first declarator. 1861 ParseDeclarator(DeclaratorInfo); 1862 // Error parsing the declarator? 1863 if (!DeclaratorInfo.hasName()) { 1864 // If so, skip until the semi-colon or a }. 1865 SkipUntil(tok::r_brace, true, true); 1866 if (Tok.is(tok::semi)) 1867 ConsumeToken(); 1868 return; 1869 } 1870 1871 ParseOptionalCXX0XVirtSpecifierSeq(VS); 1872 1873 // If attributes exist after the declarator, but before an '{', parse them. 1874 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 1875 1876 // MSVC permits pure specifier on inline functions declared at class scope. 1877 // Hence check for =0 before checking for function definition. 1878 if (getLangOpts().MicrosoftExt && Tok.is(tok::equal) && 1879 DeclaratorInfo.isFunctionDeclarator() && 1880 NextToken().is(tok::numeric_constant)) { 1881 EqualLoc = ConsumeToken(); 1882 Init = ParseInitializer(); 1883 if (Init.isInvalid()) 1884 SkipUntil(tok::comma, true, true); 1885 else 1886 HasInitializer = true; 1887 } 1888 1889 FunctionDefinitionKind DefinitionKind = FDK_Declaration; 1890 // function-definition: 1891 // 1892 // In C++11, a non-function declarator followed by an open brace is a 1893 // braced-init-list for an in-class member initialization, not an 1894 // erroneous function definition. 1895 if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus0x) { 1896 DefinitionKind = FDK_Definition; 1897 } else if (DeclaratorInfo.isFunctionDeclarator()) { 1898 if (Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) { 1899 DefinitionKind = FDK_Definition; 1900 } else if (Tok.is(tok::equal)) { 1901 const Token &KW = NextToken(); 1902 if (KW.is(tok::kw_default)) 1903 DefinitionKind = FDK_Defaulted; 1904 else if (KW.is(tok::kw_delete)) 1905 DefinitionKind = FDK_Deleted; 1906 } 1907 } 1908 1909 if (DefinitionKind) { 1910 if (!DeclaratorInfo.isFunctionDeclarator()) { 1911 Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params); 1912 ConsumeBrace(); 1913 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1914 1915 // Consume the optional ';' 1916 if (Tok.is(tok::semi)) 1917 ConsumeToken(); 1918 return; 1919 } 1920 1921 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1922 Diag(DeclaratorInfo.getIdentifierLoc(), 1923 diag::err_function_declared_typedef); 1924 // This recovery skips the entire function body. It would be nice 1925 // to simply call ParseCXXInlineMethodDef() below, however Sema 1926 // assumes the declarator represents a function, not a typedef. 1927 ConsumeBrace(); 1928 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1929 1930 // Consume the optional ';' 1931 if (Tok.is(tok::semi)) 1932 ConsumeToken(); 1933 return; 1934 } 1935 1936 Decl *FunDecl = 1937 ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo, 1938 VS, DefinitionKind, Init); 1939 1940 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 1941 CommonLateParsedAttrs[i]->addDecl(FunDecl); 1942 } 1943 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 1944 LateParsedAttrs[i]->addDecl(FunDecl); 1945 } 1946 LateParsedAttrs.clear(); 1947 1948 // Consume the ';' - it's optional unless we have a delete or default 1949 if (Tok.is(tok::semi)) 1950 ConsumeExtraSemi(AfterDefinition); 1951 1952 return; 1953 } 1954 } 1955 1956 // member-declarator-list: 1957 // member-declarator 1958 // member-declarator-list ',' member-declarator 1959 1960 SmallVector<Decl *, 8> DeclsInGroup; 1961 ExprResult BitfieldSize; 1962 bool ExpectSemi = true; 1963 1964 while (1) { 1965 // member-declarator: 1966 // declarator pure-specifier[opt] 1967 // declarator brace-or-equal-initializer[opt] 1968 // identifier[opt] ':' constant-expression 1969 if (Tok.is(tok::colon)) { 1970 ConsumeToken(); 1971 BitfieldSize = ParseConstantExpression(); 1972 if (BitfieldSize.isInvalid()) 1973 SkipUntil(tok::comma, true, true); 1974 } 1975 1976 // If a simple-asm-expr is present, parse it. 1977 if (Tok.is(tok::kw_asm)) { 1978 SourceLocation Loc; 1979 ExprResult AsmLabel(ParseSimpleAsm(&Loc)); 1980 if (AsmLabel.isInvalid()) 1981 SkipUntil(tok::comma, true, true); 1982 1983 DeclaratorInfo.setAsmLabel(AsmLabel.release()); 1984 DeclaratorInfo.SetRangeEnd(Loc); 1985 } 1986 1987 // If attributes exist after the declarator, parse them. 1988 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 1989 1990 // FIXME: When g++ adds support for this, we'll need to check whether it 1991 // goes before or after the GNU attributes and __asm__. 1992 ParseOptionalCXX0XVirtSpecifierSeq(VS); 1993 1994 InClassInitStyle HasInClassInit = ICIS_NoInit; 1995 if ((Tok.is(tok::equal) || Tok.is(tok::l_brace)) && !HasInitializer) { 1996 if (BitfieldSize.get()) { 1997 Diag(Tok, diag::err_bitfield_member_init); 1998 SkipUntil(tok::comma, true, true); 1999 } else { 2000 HasInitializer = true; 2001 if (!DeclaratorInfo.isDeclarationOfFunction() && 2002 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2003 != DeclSpec::SCS_static && 2004 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2005 != DeclSpec::SCS_typedef) 2006 HasInClassInit = Tok.is(tok::equal) ? ICIS_CopyInit : ICIS_ListInit; 2007 } 2008 } 2009 2010 // NOTE: If Sema is the Action module and declarator is an instance field, 2011 // this call will *not* return the created decl; It will return null. 2012 // See Sema::ActOnCXXMemberDeclarator for details. 2013 2014 Decl *ThisDecl = 0; 2015 if (DS.isFriendSpecified()) { 2016 // TODO: handle initializers, bitfields, 'delete' 2017 ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo, 2018 move(TemplateParams)); 2019 } else { 2020 ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, 2021 DeclaratorInfo, 2022 move(TemplateParams), 2023 BitfieldSize.release(), 2024 VS, HasInClassInit); 2025 if (AccessAttrs) 2026 Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs, 2027 false, true); 2028 } 2029 2030 // Set the Decl for any late parsed attributes 2031 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 2032 CommonLateParsedAttrs[i]->addDecl(ThisDecl); 2033 } 2034 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 2035 LateParsedAttrs[i]->addDecl(ThisDecl); 2036 } 2037 LateParsedAttrs.clear(); 2038 2039 // Handle the initializer. 2040 if (HasInClassInit != ICIS_NoInit) { 2041 // The initializer was deferred; parse it and cache the tokens. 2042 Diag(Tok, getLangOpts().CPlusPlus0x ? 2043 diag::warn_cxx98_compat_nonstatic_member_init : 2044 diag::ext_nonstatic_member_init); 2045 2046 if (DeclaratorInfo.isArrayOfUnknownBound()) { 2047 // C++11 [dcl.array]p3: An array bound may also be omitted when the 2048 // declarator is followed by an initializer. 2049 // 2050 // A brace-or-equal-initializer for a member-declarator is not an 2051 // initializer in the grammar, so this is ill-formed. 2052 Diag(Tok, diag::err_incomplete_array_member_init); 2053 SkipUntil(tok::comma, true, true); 2054 if (ThisDecl) 2055 // Avoid later warnings about a class member of incomplete type. 2056 ThisDecl->setInvalidDecl(); 2057 } else 2058 ParseCXXNonStaticMemberInitializer(ThisDecl); 2059 } else if (HasInitializer) { 2060 // Normal initializer. 2061 if (!Init.isUsable()) 2062 Init = ParseCXXMemberInitializer(ThisDecl, 2063 DeclaratorInfo.isDeclarationOfFunction(), EqualLoc); 2064 2065 if (Init.isInvalid()) 2066 SkipUntil(tok::comma, true, true); 2067 else if (ThisDecl) 2068 Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(), 2069 DS.getTypeSpecType() == DeclSpec::TST_auto); 2070 } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static) { 2071 // No initializer. 2072 Actions.ActOnUninitializedDecl(ThisDecl, 2073 DS.getTypeSpecType() == DeclSpec::TST_auto); 2074 } 2075 2076 if (ThisDecl) { 2077 Actions.FinalizeDeclaration(ThisDecl); 2078 DeclsInGroup.push_back(ThisDecl); 2079 } 2080 2081 if (ThisDecl && DeclaratorInfo.isFunctionDeclarator() && 2082 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2083 != DeclSpec::SCS_typedef) { 2084 HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl); 2085 } 2086 2087 DeclaratorInfo.complete(ThisDecl); 2088 2089 // If we don't have a comma, it is either the end of the list (a ';') 2090 // or an error, bail out. 2091 if (Tok.isNot(tok::comma)) 2092 break; 2093 2094 // Consume the comma. 2095 SourceLocation CommaLoc = ConsumeToken(); 2096 2097 if (Tok.isAtStartOfLine() && 2098 !MightBeDeclarator(Declarator::MemberContext)) { 2099 // This comma was followed by a line-break and something which can't be 2100 // the start of a declarator. The comma was probably a typo for a 2101 // semicolon. 2102 Diag(CommaLoc, diag::err_expected_semi_declaration) 2103 << FixItHint::CreateReplacement(CommaLoc, ";"); 2104 ExpectSemi = false; 2105 break; 2106 } 2107 2108 // Parse the next declarator. 2109 DeclaratorInfo.clear(); 2110 VS.clear(); 2111 BitfieldSize = true; 2112 Init = true; 2113 HasInitializer = false; 2114 DeclaratorInfo.setCommaLoc(CommaLoc); 2115 2116 // Attributes are only allowed on the second declarator. 2117 MaybeParseGNUAttributes(DeclaratorInfo); 2118 2119 if (Tok.isNot(tok::colon)) 2120 ParseDeclarator(DeclaratorInfo); 2121 } 2122 2123 if (ExpectSemi && 2124 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) { 2125 // Skip to end of block or statement. 2126 SkipUntil(tok::r_brace, true, true); 2127 // If we stopped at a ';', eat it. 2128 if (Tok.is(tok::semi)) ConsumeToken(); 2129 return; 2130 } 2131 2132 Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup.data(), 2133 DeclsInGroup.size()); 2134} 2135 2136/// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer or 2137/// pure-specifier. Also detect and reject any attempted defaulted/deleted 2138/// function definition. The location of the '=', if any, will be placed in 2139/// EqualLoc. 2140/// 2141/// pure-specifier: 2142/// '= 0' 2143/// 2144/// brace-or-equal-initializer: 2145/// '=' initializer-expression 2146/// braced-init-list 2147/// 2148/// initializer-clause: 2149/// assignment-expression 2150/// braced-init-list 2151/// 2152/// defaulted/deleted function-definition: 2153/// '=' 'default' 2154/// '=' 'delete' 2155/// 2156/// Prior to C++0x, the assignment-expression in an initializer-clause must 2157/// be a constant-expression. 2158ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction, 2159 SourceLocation &EqualLoc) { 2160 assert((Tok.is(tok::equal) || Tok.is(tok::l_brace)) 2161 && "Data member initializer not starting with '=' or '{'"); 2162 2163 EnterExpressionEvaluationContext Context(Actions, 2164 Sema::PotentiallyEvaluated, 2165 D); 2166 if (Tok.is(tok::equal)) { 2167 EqualLoc = ConsumeToken(); 2168 if (Tok.is(tok::kw_delete)) { 2169 // In principle, an initializer of '= delete p;' is legal, but it will 2170 // never type-check. It's better to diagnose it as an ill-formed expression 2171 // than as an ill-formed deleted non-function member. 2172 // An initializer of '= delete p, foo' will never be parsed, because 2173 // a top-level comma always ends the initializer expression. 2174 const Token &Next = NextToken(); 2175 if (IsFunction || Next.is(tok::semi) || Next.is(tok::comma) || 2176 Next.is(tok::eof)) { 2177 if (IsFunction) 2178 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration) 2179 << 1 /* delete */; 2180 else 2181 Diag(ConsumeToken(), diag::err_deleted_non_function); 2182 return ExprResult(); 2183 } 2184 } else if (Tok.is(tok::kw_default)) { 2185 if (IsFunction) 2186 Diag(Tok, diag::err_default_delete_in_multiple_declaration) 2187 << 0 /* default */; 2188 else 2189 Diag(ConsumeToken(), diag::err_default_special_members); 2190 return ExprResult(); 2191 } 2192 2193 } 2194 return ParseInitializer(); 2195} 2196 2197/// ParseCXXMemberSpecification - Parse the class definition. 2198/// 2199/// member-specification: 2200/// member-declaration member-specification[opt] 2201/// access-specifier ':' member-specification[opt] 2202/// 2203void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, 2204 unsigned TagType, Decl *TagDecl) { 2205 assert((TagType == DeclSpec::TST_struct || 2206 TagType == DeclSpec::TST_union || 2207 TagType == DeclSpec::TST_class) && "Invalid TagType!"); 2208 2209 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc, 2210 "parsing struct/union/class body"); 2211 2212 // Determine whether this is a non-nested class. Note that local 2213 // classes are *not* considered to be nested classes. 2214 bool NonNestedClass = true; 2215 if (!ClassStack.empty()) { 2216 for (const Scope *S = getCurScope(); S; S = S->getParent()) { 2217 if (S->isClassScope()) { 2218 // We're inside a class scope, so this is a nested class. 2219 NonNestedClass = false; 2220 break; 2221 } 2222 2223 if ((S->getFlags() & Scope::FnScope)) { 2224 // If we're in a function or function template declared in the 2225 // body of a class, then this is a local class rather than a 2226 // nested class. 2227 const Scope *Parent = S->getParent(); 2228 if (Parent->isTemplateParamScope()) 2229 Parent = Parent->getParent(); 2230 if (Parent->isClassScope()) 2231 break; 2232 } 2233 } 2234 } 2235 2236 // Enter a scope for the class. 2237 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); 2238 2239 // Note that we are parsing a new (potentially-nested) class definition. 2240 ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass); 2241 2242 if (TagDecl) 2243 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); 2244 2245 SourceLocation FinalLoc; 2246 2247 // Parse the optional 'final' keyword. 2248 if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) { 2249 assert(isCXX0XFinalKeyword() && "not a class definition"); 2250 FinalLoc = ConsumeToken(); 2251 2252 Diag(FinalLoc, getLangOpts().CPlusPlus0x ? 2253 diag::warn_cxx98_compat_override_control_keyword : 2254 diag::ext_override_control_keyword) << "final"; 2255 } 2256 2257 if (Tok.is(tok::colon)) { 2258 ParseBaseClause(TagDecl); 2259 2260 if (!Tok.is(tok::l_brace)) { 2261 Diag(Tok, diag::err_expected_lbrace_after_base_specifiers); 2262 2263 if (TagDecl) 2264 Actions.ActOnTagDefinitionError(getCurScope(), TagDecl); 2265 return; 2266 } 2267 } 2268 2269 assert(Tok.is(tok::l_brace)); 2270 BalancedDelimiterTracker T(*this, tok::l_brace); 2271 T.consumeOpen(); 2272 2273 if (TagDecl) 2274 Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc, 2275 T.getOpenLocation()); 2276 2277 // C++ 11p3: Members of a class defined with the keyword class are private 2278 // by default. Members of a class defined with the keywords struct or union 2279 // are public by default. 2280 AccessSpecifier CurAS; 2281 if (TagType == DeclSpec::TST_class) 2282 CurAS = AS_private; 2283 else 2284 CurAS = AS_public; 2285 ParsedAttributes AccessAttrs(AttrFactory); 2286 2287 if (TagDecl) { 2288 // While we still have something to read, read the member-declarations. 2289 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 2290 // Each iteration of this loop reads one member-declaration. 2291 2292 if (getLangOpts().MicrosoftExt && (Tok.is(tok::kw___if_exists) || 2293 Tok.is(tok::kw___if_not_exists))) { 2294 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 2295 continue; 2296 } 2297 2298 // Check for extraneous top-level semicolon. 2299 if (Tok.is(tok::semi)) { 2300 ConsumeExtraSemi(InsideStruct, 2301 DeclSpec::getSpecifierName((DeclSpec::TST)TagType)); 2302 continue; 2303 } 2304 2305 if (Tok.is(tok::annot_pragma_vis)) { 2306 HandlePragmaVisibility(); 2307 continue; 2308 } 2309 2310 if (Tok.is(tok::annot_pragma_pack)) { 2311 HandlePragmaPack(); 2312 continue; 2313 } 2314 2315 AccessSpecifier AS = getAccessSpecifierIfPresent(); 2316 if (AS != AS_none) { 2317 // Current token is a C++ access specifier. 2318 CurAS = AS; 2319 SourceLocation ASLoc = Tok.getLocation(); 2320 unsigned TokLength = Tok.getLength(); 2321 ConsumeToken(); 2322 AccessAttrs.clear(); 2323 MaybeParseGNUAttributes(AccessAttrs); 2324 2325 SourceLocation EndLoc; 2326 if (Tok.is(tok::colon)) { 2327 EndLoc = Tok.getLocation(); 2328 ConsumeToken(); 2329 } else if (Tok.is(tok::semi)) { 2330 EndLoc = Tok.getLocation(); 2331 ConsumeToken(); 2332 Diag(EndLoc, diag::err_expected_colon) 2333 << FixItHint::CreateReplacement(EndLoc, ":"); 2334 } else { 2335 EndLoc = ASLoc.getLocWithOffset(TokLength); 2336 Diag(EndLoc, diag::err_expected_colon) 2337 << FixItHint::CreateInsertion(EndLoc, ":"); 2338 } 2339 2340 if (Actions.ActOnAccessSpecifier(AS, ASLoc, EndLoc, 2341 AccessAttrs.getList())) { 2342 // found another attribute than only annotations 2343 AccessAttrs.clear(); 2344 } 2345 2346 continue; 2347 } 2348 2349 // FIXME: Make sure we don't have a template here. 2350 2351 // Parse all the comma separated declarators. 2352 ParseCXXClassMemberDeclaration(CurAS, AccessAttrs.getList()); 2353 } 2354 2355 T.consumeClose(); 2356 } else { 2357 SkipUntil(tok::r_brace, false, false); 2358 } 2359 2360 // If attributes exist after class contents, parse them. 2361 ParsedAttributes attrs(AttrFactory); 2362 MaybeParseGNUAttributes(attrs); 2363 2364 if (TagDecl) 2365 Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl, 2366 T.getOpenLocation(), 2367 T.getCloseLocation(), 2368 attrs.getList()); 2369 2370 // C++11 [class.mem]p2: 2371 // Within the class member-specification, the class is regarded as complete 2372 // within function bodies, default arguments, and 2373 // brace-or-equal-initializers for non-static data members (including such 2374 // things in nested classes). 2375 if (TagDecl && NonNestedClass) { 2376 // We are not inside a nested class. This class and its nested classes 2377 // are complete and we can parse the delayed portions of method 2378 // declarations and the lexed inline method definitions, along with any 2379 // delayed attributes. 2380 SourceLocation SavedPrevTokLocation = PrevTokLocation; 2381 ParseLexedAttributes(getCurrentClass()); 2382 ParseLexedMethodDeclarations(getCurrentClass()); 2383 2384 // We've finished with all pending member declarations. 2385 Actions.ActOnFinishCXXMemberDecls(); 2386 2387 ParseLexedMemberInitializers(getCurrentClass()); 2388 ParseLexedMethodDefs(getCurrentClass()); 2389 PrevTokLocation = SavedPrevTokLocation; 2390 } 2391 2392 if (TagDecl) 2393 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, 2394 T.getCloseLocation()); 2395 2396 // Leave the class scope. 2397 ParsingDef.Pop(); 2398 ClassScope.Exit(); 2399} 2400 2401/// ParseConstructorInitializer - Parse a C++ constructor initializer, 2402/// which explicitly initializes the members or base classes of a 2403/// class (C++ [class.base.init]). For example, the three initializers 2404/// after the ':' in the Derived constructor below: 2405/// 2406/// @code 2407/// class Base { }; 2408/// class Derived : Base { 2409/// int x; 2410/// float f; 2411/// public: 2412/// Derived(float f) : Base(), x(17), f(f) { } 2413/// }; 2414/// @endcode 2415/// 2416/// [C++] ctor-initializer: 2417/// ':' mem-initializer-list 2418/// 2419/// [C++] mem-initializer-list: 2420/// mem-initializer ...[opt] 2421/// mem-initializer ...[opt] , mem-initializer-list 2422void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) { 2423 assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); 2424 2425 // Poison the SEH identifiers so they are flagged as illegal in constructor initializers 2426 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true); 2427 SourceLocation ColonLoc = ConsumeToken(); 2428 2429 SmallVector<CXXCtorInitializer*, 4> MemInitializers; 2430 bool AnyErrors = false; 2431 2432 do { 2433 if (Tok.is(tok::code_completion)) { 2434 Actions.CodeCompleteConstructorInitializer(ConstructorDecl, 2435 MemInitializers.data(), 2436 MemInitializers.size()); 2437 return cutOffParsing(); 2438 } else { 2439 MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); 2440 if (!MemInit.isInvalid()) 2441 MemInitializers.push_back(MemInit.get()); 2442 else 2443 AnyErrors = true; 2444 } 2445 2446 if (Tok.is(tok::comma)) 2447 ConsumeToken(); 2448 else if (Tok.is(tok::l_brace)) 2449 break; 2450 // If the next token looks like a base or member initializer, assume that 2451 // we're just missing a comma. 2452 else if (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) { 2453 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation); 2454 Diag(Loc, diag::err_ctor_init_missing_comma) 2455 << FixItHint::CreateInsertion(Loc, ", "); 2456 } else { 2457 // Skip over garbage, until we get to '{'. Don't eat the '{'. 2458 Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); 2459 SkipUntil(tok::l_brace, true, true); 2460 break; 2461 } 2462 } while (true); 2463 2464 Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, 2465 MemInitializers.data(), MemInitializers.size(), 2466 AnyErrors); 2467} 2468 2469/// ParseMemInitializer - Parse a C++ member initializer, which is 2470/// part of a constructor initializer that explicitly initializes one 2471/// member or base class (C++ [class.base.init]). See 2472/// ParseConstructorInitializer for an example. 2473/// 2474/// [C++] mem-initializer: 2475/// mem-initializer-id '(' expression-list[opt] ')' 2476/// [C++0x] mem-initializer-id braced-init-list 2477/// 2478/// [C++] mem-initializer-id: 2479/// '::'[opt] nested-name-specifier[opt] class-name 2480/// identifier 2481Parser::MemInitResult Parser::ParseMemInitializer(Decl *ConstructorDecl) { 2482 // parse '::'[opt] nested-name-specifier[opt] 2483 CXXScopeSpec SS; 2484 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 2485 ParsedType TemplateTypeTy; 2486 if (Tok.is(tok::annot_template_id)) { 2487 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 2488 if (TemplateId->Kind == TNK_Type_template || 2489 TemplateId->Kind == TNK_Dependent_template_name) { 2490 AnnotateTemplateIdTokenAsType(); 2491 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 2492 TemplateTypeTy = getTypeAnnotation(Tok); 2493 } 2494 } 2495 // Uses of decltype will already have been converted to annot_decltype by 2496 // ParseOptionalCXXScopeSpecifier at this point. 2497 if (!TemplateTypeTy && Tok.isNot(tok::identifier) 2498 && Tok.isNot(tok::annot_decltype)) { 2499 Diag(Tok, diag::err_expected_member_or_base_name); 2500 return true; 2501 } 2502 2503 IdentifierInfo *II = 0; 2504 DeclSpec DS(AttrFactory); 2505 SourceLocation IdLoc = Tok.getLocation(); 2506 if (Tok.is(tok::annot_decltype)) { 2507 // Get the decltype expression, if there is one. 2508 ParseDecltypeSpecifier(DS); 2509 } else { 2510 if (Tok.is(tok::identifier)) 2511 // Get the identifier. This may be a member name or a class name, 2512 // but we'll let the semantic analysis determine which it is. 2513 II = Tok.getIdentifierInfo(); 2514 ConsumeToken(); 2515 } 2516 2517 2518 // Parse the '('. 2519 if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) { 2520 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); 2521 2522 ExprResult InitList = ParseBraceInitializer(); 2523 if (InitList.isInvalid()) 2524 return true; 2525 2526 SourceLocation EllipsisLoc; 2527 if (Tok.is(tok::ellipsis)) 2528 EllipsisLoc = ConsumeToken(); 2529 2530 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2531 TemplateTypeTy, DS, IdLoc, 2532 InitList.take(), EllipsisLoc); 2533 } else if(Tok.is(tok::l_paren)) { 2534 BalancedDelimiterTracker T(*this, tok::l_paren); 2535 T.consumeOpen(); 2536 2537 // Parse the optional expression-list. 2538 ExprVector ArgExprs(Actions); 2539 CommaLocsTy CommaLocs; 2540 if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { 2541 SkipUntil(tok::r_paren); 2542 return true; 2543 } 2544 2545 T.consumeClose(); 2546 2547 SourceLocation EllipsisLoc; 2548 if (Tok.is(tok::ellipsis)) 2549 EllipsisLoc = ConsumeToken(); 2550 2551 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2552 TemplateTypeTy, DS, IdLoc, 2553 T.getOpenLocation(), ArgExprs.take(), 2554 ArgExprs.size(), T.getCloseLocation(), 2555 EllipsisLoc); 2556 } 2557 2558 Diag(Tok, getLangOpts().CPlusPlus0x ? diag::err_expected_lparen_or_lbrace 2559 : diag::err_expected_lparen); 2560 return true; 2561} 2562 2563/// \brief Parse a C++ exception-specification if present (C++0x [except.spec]). 2564/// 2565/// exception-specification: 2566/// dynamic-exception-specification 2567/// noexcept-specification 2568/// 2569/// noexcept-specification: 2570/// 'noexcept' 2571/// 'noexcept' '(' constant-expression ')' 2572ExceptionSpecificationType 2573Parser::tryParseExceptionSpecification( 2574 SourceRange &SpecificationRange, 2575 SmallVectorImpl<ParsedType> &DynamicExceptions, 2576 SmallVectorImpl<SourceRange> &DynamicExceptionRanges, 2577 ExprResult &NoexceptExpr) { 2578 ExceptionSpecificationType Result = EST_None; 2579 2580 // See if there's a dynamic specification. 2581 if (Tok.is(tok::kw_throw)) { 2582 Result = ParseDynamicExceptionSpecification(SpecificationRange, 2583 DynamicExceptions, 2584 DynamicExceptionRanges); 2585 assert(DynamicExceptions.size() == DynamicExceptionRanges.size() && 2586 "Produced different number of exception types and ranges."); 2587 } 2588 2589 // If there's no noexcept specification, we're done. 2590 if (Tok.isNot(tok::kw_noexcept)) 2591 return Result; 2592 2593 Diag(Tok, diag::warn_cxx98_compat_noexcept_decl); 2594 2595 // If we already had a dynamic specification, parse the noexcept for, 2596 // recovery, but emit a diagnostic and don't store the results. 2597 SourceRange NoexceptRange; 2598 ExceptionSpecificationType NoexceptType = EST_None; 2599 2600 SourceLocation KeywordLoc = ConsumeToken(); 2601 if (Tok.is(tok::l_paren)) { 2602 // There is an argument. 2603 BalancedDelimiterTracker T(*this, tok::l_paren); 2604 T.consumeOpen(); 2605 NoexceptType = EST_ComputedNoexcept; 2606 NoexceptExpr = ParseConstantExpression(); 2607 // The argument must be contextually convertible to bool. We use 2608 // ActOnBooleanCondition for this purpose. 2609 if (!NoexceptExpr.isInvalid()) 2610 NoexceptExpr = Actions.ActOnBooleanCondition(getCurScope(), KeywordLoc, 2611 NoexceptExpr.get()); 2612 T.consumeClose(); 2613 NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation()); 2614 } else { 2615 // There is no argument. 2616 NoexceptType = EST_BasicNoexcept; 2617 NoexceptRange = SourceRange(KeywordLoc, KeywordLoc); 2618 } 2619 2620 if (Result == EST_None) { 2621 SpecificationRange = NoexceptRange; 2622 Result = NoexceptType; 2623 2624 // If there's a dynamic specification after a noexcept specification, 2625 // parse that and ignore the results. 2626 if (Tok.is(tok::kw_throw)) { 2627 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2628 ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions, 2629 DynamicExceptionRanges); 2630 } 2631 } else { 2632 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2633 } 2634 2635 return Result; 2636} 2637 2638/// ParseDynamicExceptionSpecification - Parse a C++ 2639/// dynamic-exception-specification (C++ [except.spec]). 2640/// 2641/// dynamic-exception-specification: 2642/// 'throw' '(' type-id-list [opt] ')' 2643/// [MS] 'throw' '(' '...' ')' 2644/// 2645/// type-id-list: 2646/// type-id ... [opt] 2647/// type-id-list ',' type-id ... [opt] 2648/// 2649ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification( 2650 SourceRange &SpecificationRange, 2651 SmallVectorImpl<ParsedType> &Exceptions, 2652 SmallVectorImpl<SourceRange> &Ranges) { 2653 assert(Tok.is(tok::kw_throw) && "expected throw"); 2654 2655 SpecificationRange.setBegin(ConsumeToken()); 2656 BalancedDelimiterTracker T(*this, tok::l_paren); 2657 if (T.consumeOpen()) { 2658 Diag(Tok, diag::err_expected_lparen_after) << "throw"; 2659 SpecificationRange.setEnd(SpecificationRange.getBegin()); 2660 return EST_DynamicNone; 2661 } 2662 2663 // Parse throw(...), a Microsoft extension that means "this function 2664 // can throw anything". 2665 if (Tok.is(tok::ellipsis)) { 2666 SourceLocation EllipsisLoc = ConsumeToken(); 2667 if (!getLangOpts().MicrosoftExt) 2668 Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); 2669 T.consumeClose(); 2670 SpecificationRange.setEnd(T.getCloseLocation()); 2671 return EST_MSAny; 2672 } 2673 2674 // Parse the sequence of type-ids. 2675 SourceRange Range; 2676 while (Tok.isNot(tok::r_paren)) { 2677 TypeResult Res(ParseTypeName(&Range)); 2678 2679 if (Tok.is(tok::ellipsis)) { 2680 // C++0x [temp.variadic]p5: 2681 // - In a dynamic-exception-specification (15.4); the pattern is a 2682 // type-id. 2683 SourceLocation Ellipsis = ConsumeToken(); 2684 Range.setEnd(Ellipsis); 2685 if (!Res.isInvalid()) 2686 Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis); 2687 } 2688 2689 if (!Res.isInvalid()) { 2690 Exceptions.push_back(Res.get()); 2691 Ranges.push_back(Range); 2692 } 2693 2694 if (Tok.is(tok::comma)) 2695 ConsumeToken(); 2696 else 2697 break; 2698 } 2699 2700 T.consumeClose(); 2701 SpecificationRange.setEnd(T.getCloseLocation()); 2702 return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic; 2703} 2704 2705/// ParseTrailingReturnType - Parse a trailing return type on a new-style 2706/// function declaration. 2707TypeResult Parser::ParseTrailingReturnType(SourceRange &Range) { 2708 assert(Tok.is(tok::arrow) && "expected arrow"); 2709 2710 ConsumeToken(); 2711 2712 return ParseTypeName(&Range, Declarator::TrailingReturnContext); 2713} 2714 2715/// \brief We have just started parsing the definition of a new class, 2716/// so push that class onto our stack of classes that is currently 2717/// being parsed. 2718Sema::ParsingClassState 2719Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass) { 2720 assert((NonNestedClass || !ClassStack.empty()) && 2721 "Nested class without outer class"); 2722 ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass)); 2723 return Actions.PushParsingClass(); 2724} 2725 2726/// \brief Deallocate the given parsed class and all of its nested 2727/// classes. 2728void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { 2729 for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I) 2730 delete Class->LateParsedDeclarations[I]; 2731 delete Class; 2732} 2733 2734/// \brief Pop the top class of the stack of classes that are 2735/// currently being parsed. 2736/// 2737/// This routine should be called when we have finished parsing the 2738/// definition of a class, but have not yet popped the Scope 2739/// associated with the class's definition. 2740/// 2741/// \returns true if the class we've popped is a top-level class, 2742/// false otherwise. 2743void Parser::PopParsingClass(Sema::ParsingClassState state) { 2744 assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); 2745 2746 Actions.PopParsingClass(state); 2747 2748 ParsingClass *Victim = ClassStack.top(); 2749 ClassStack.pop(); 2750 if (Victim->TopLevelClass) { 2751 // Deallocate all of the nested classes of this class, 2752 // recursively: we don't need to keep any of this information. 2753 DeallocateParsedClasses(Victim); 2754 return; 2755 } 2756 assert(!ClassStack.empty() && "Missing top-level class?"); 2757 2758 if (Victim->LateParsedDeclarations.empty()) { 2759 // The victim is a nested class, but we will not need to perform 2760 // any processing after the definition of this class since it has 2761 // no members whose handling was delayed. Therefore, we can just 2762 // remove this nested class. 2763 DeallocateParsedClasses(Victim); 2764 return; 2765 } 2766 2767 // This nested class has some members that will need to be processed 2768 // after the top-level class is completely defined. Therefore, add 2769 // it to the list of nested classes within its parent. 2770 assert(getCurScope()->isClassScope() && "Nested class outside of class scope?"); 2771 ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim)); 2772 Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope(); 2773} 2774 2775/// \brief Try to parse an 'identifier' which appears within an attribute-token. 2776/// 2777/// \return the parsed identifier on success, and 0 if the next token is not an 2778/// attribute-token. 2779/// 2780/// C++11 [dcl.attr.grammar]p3: 2781/// If a keyword or an alternative token that satisfies the syntactic 2782/// requirements of an identifier is contained in an attribute-token, 2783/// it is considered an identifier. 2784IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) { 2785 switch (Tok.getKind()) { 2786 default: 2787 // Identifiers and keywords have identifier info attached. 2788 if (IdentifierInfo *II = Tok.getIdentifierInfo()) { 2789 Loc = ConsumeToken(); 2790 return II; 2791 } 2792 return 0; 2793 2794 case tok::ampamp: // 'and' 2795 case tok::pipe: // 'bitor' 2796 case tok::pipepipe: // 'or' 2797 case tok::caret: // 'xor' 2798 case tok::tilde: // 'compl' 2799 case tok::amp: // 'bitand' 2800 case tok::ampequal: // 'and_eq' 2801 case tok::pipeequal: // 'or_eq' 2802 case tok::caretequal: // 'xor_eq' 2803 case tok::exclaim: // 'not' 2804 case tok::exclaimequal: // 'not_eq' 2805 // Alternative tokens do not have identifier info, but their spelling 2806 // starts with an alphabetical character. 2807 llvm::SmallString<8> SpellingBuf; 2808 StringRef Spelling = PP.getSpelling(Tok.getLocation(), SpellingBuf); 2809 if (std::isalpha(Spelling[0])) { 2810 Loc = ConsumeToken(); 2811 return &PP.getIdentifierTable().get(Spelling); 2812 } 2813 return 0; 2814 } 2815} 2816 2817/// ParseCXX11AttributeSpecifier - Parse a C++11 attribute-specifier. Currently 2818/// only parses standard attributes. 2819/// 2820/// [C++11] attribute-specifier: 2821/// '[' '[' attribute-list ']' ']' 2822/// alignment-specifier 2823/// 2824/// [C++11] attribute-list: 2825/// attribute[opt] 2826/// attribute-list ',' attribute[opt] 2827/// attribute '...' 2828/// attribute-list ',' attribute '...' 2829/// 2830/// [C++11] attribute: 2831/// attribute-token attribute-argument-clause[opt] 2832/// 2833/// [C++11] attribute-token: 2834/// identifier 2835/// attribute-scoped-token 2836/// 2837/// [C++11] attribute-scoped-token: 2838/// attribute-namespace '::' identifier 2839/// 2840/// [C++11] attribute-namespace: 2841/// identifier 2842/// 2843/// [C++11] attribute-argument-clause: 2844/// '(' balanced-token-seq ')' 2845/// 2846/// [C++11] balanced-token-seq: 2847/// balanced-token 2848/// balanced-token-seq balanced-token 2849/// 2850/// [C++11] balanced-token: 2851/// '(' balanced-token-seq ')' 2852/// '[' balanced-token-seq ']' 2853/// '{' balanced-token-seq '}' 2854/// any token but '(', ')', '[', ']', '{', or '}' 2855void Parser::ParseCXX11AttributeSpecifier(ParsedAttributes &attrs, 2856 SourceLocation *endLoc) { 2857 if (Tok.is(tok::kw_alignas)) { 2858 Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas); 2859 ParseAlignmentSpecifier(attrs, endLoc); 2860 return; 2861 } 2862 2863 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) 2864 && "Not a C++11 attribute list"); 2865 2866 Diag(Tok.getLocation(), diag::warn_cxx98_compat_attribute); 2867 2868 ConsumeBracket(); 2869 ConsumeBracket(); 2870 2871 while (Tok.isNot(tok::r_square)) { 2872 // attribute not present 2873 if (Tok.is(tok::comma)) { 2874 ConsumeToken(); 2875 continue; 2876 } 2877 2878 SourceLocation ScopeLoc, AttrLoc; 2879 IdentifierInfo *ScopeName = 0, *AttrName = 0; 2880 2881 AttrName = TryParseCXX11AttributeIdentifier(AttrLoc); 2882 if (!AttrName) 2883 // Break out to the "expected ']'" diagnostic. 2884 break; 2885 2886 // scoped attribute 2887 if (Tok.is(tok::coloncolon)) { 2888 ConsumeToken(); 2889 2890 ScopeName = AttrName; 2891 ScopeLoc = AttrLoc; 2892 2893 AttrName = TryParseCXX11AttributeIdentifier(AttrLoc); 2894 if (!AttrName) { 2895 Diag(Tok.getLocation(), diag::err_expected_ident); 2896 SkipUntil(tok::r_square, tok::comma, true, true); 2897 continue; 2898 } 2899 } 2900 2901 bool AttrParsed = false; 2902 switch (AttributeList::getKind(AttrName, ScopeName, 2903 AttributeList::AS_CXX11)) { 2904 // No arguments 2905 case AttributeList::AT_CarriesDependency: 2906 // FIXME: implement generic support of attributes with C++11 syntax 2907 // see Parse/ParseDecl.cpp: ParseGNUAttributes 2908 case AttributeList::AT_FallThrough: 2909 case AttributeList::AT_NoReturn: { 2910 if (Tok.is(tok::l_paren)) { 2911 Diag(Tok.getLocation(), diag::err_cxx11_attribute_forbids_arguments) 2912 << AttrName->getName(); 2913 break; 2914 } 2915 2916 attrs.addNew(AttrName, 2917 SourceRange(ScopeLoc.isValid() ? ScopeLoc : AttrLoc, 2918 AttrLoc), 2919 ScopeName, ScopeLoc, 0, 2920 SourceLocation(), 0, 0, AttributeList::AS_CXX11); 2921 AttrParsed = true; 2922 break; 2923 } 2924 2925 // Silence warnings 2926 default: break; 2927 } 2928 2929 // Skip the entire parameter clause, if any 2930 if (!AttrParsed && Tok.is(tok::l_paren)) { 2931 ConsumeParen(); 2932 // SkipUntil maintains the balancedness of tokens. 2933 SkipUntil(tok::r_paren, false); 2934 } 2935 2936 if (Tok.is(tok::ellipsis)) { 2937 if (AttrParsed) 2938 Diag(Tok, diag::err_cxx11_attribute_forbids_ellipsis) 2939 << AttrName->getName(); 2940 ConsumeToken(); 2941 } 2942 } 2943 2944 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2945 SkipUntil(tok::r_square, false); 2946 if (endLoc) 2947 *endLoc = Tok.getLocation(); 2948 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2949 SkipUntil(tok::r_square, false); 2950} 2951 2952/// ParseCXX11Attributes - Parse a C++0x attribute-specifier-seq. 2953/// 2954/// attribute-specifier-seq: 2955/// attribute-specifier-seq[opt] attribute-specifier 2956void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs, 2957 SourceLocation *endLoc) { 2958 SourceLocation StartLoc = Tok.getLocation(), Loc; 2959 if (!endLoc) 2960 endLoc = &Loc; 2961 2962 do { 2963 ParseCXX11AttributeSpecifier(attrs, endLoc); 2964 } while (isCXX11AttributeSpecifier()); 2965 2966 attrs.Range = SourceRange(StartLoc, *endLoc); 2967} 2968 2969/// ParseMicrosoftAttributes - Parse a Microsoft attribute [Attr] 2970/// 2971/// [MS] ms-attribute: 2972/// '[' token-seq ']' 2973/// 2974/// [MS] ms-attribute-seq: 2975/// ms-attribute[opt] 2976/// ms-attribute ms-attribute-seq 2977void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs, 2978 SourceLocation *endLoc) { 2979 assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list"); 2980 2981 while (Tok.is(tok::l_square)) { 2982 // FIXME: If this is actually a C++11 attribute, parse it as one. 2983 ConsumeBracket(); 2984 SkipUntil(tok::r_square, true, true); 2985 if (endLoc) *endLoc = Tok.getLocation(); 2986 ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); 2987 } 2988} 2989 2990void Parser::ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType, 2991 AccessSpecifier& CurAS) { 2992 IfExistsCondition Result; 2993 if (ParseMicrosoftIfExistsCondition(Result)) 2994 return; 2995 2996 BalancedDelimiterTracker Braces(*this, tok::l_brace); 2997 if (Braces.consumeOpen()) { 2998 Diag(Tok, diag::err_expected_lbrace); 2999 return; 3000 } 3001 3002 switch (Result.Behavior) { 3003 case IEB_Parse: 3004 // Parse the declarations below. 3005 break; 3006 3007 case IEB_Dependent: 3008 Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists) 3009 << Result.IsIfExists; 3010 // Fall through to skip. 3011 3012 case IEB_Skip: 3013 Braces.skipToEnd(); 3014 return; 3015 } 3016 3017 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 3018 // __if_exists, __if_not_exists can nest. 3019 if ((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists))) { 3020 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 3021 continue; 3022 } 3023 3024 // Check for extraneous top-level semicolon. 3025 if (Tok.is(tok::semi)) { 3026 ConsumeExtraSemi(InsideStruct, 3027 DeclSpec::getSpecifierName((DeclSpec::TST)TagType)); 3028 continue; 3029 } 3030 3031 AccessSpecifier AS = getAccessSpecifierIfPresent(); 3032 if (AS != AS_none) { 3033 // Current token is a C++ access specifier. 3034 CurAS = AS; 3035 SourceLocation ASLoc = Tok.getLocation(); 3036 ConsumeToken(); 3037 if (Tok.is(tok::colon)) 3038 Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation()); 3039 else 3040 Diag(Tok, diag::err_expected_colon); 3041 ConsumeToken(); 3042 continue; 3043 } 3044 3045 // Parse all the comma separated declarators. 3046 ParseCXXClassMemberDeclaration(CurAS, 0); 3047 } 3048 3049 Braces.consumeClose(); 3050} 3051