ParseDeclCXX.cpp revision 7796eb5643244f3134834253ce5ea89107ac21c1
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} 902 903/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or 904/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which 905/// until we reach the start of a definition or see a token that 906/// cannot start a definition. 907/// 908/// class-specifier: [C++ class] 909/// class-head '{' member-specification[opt] '}' 910/// class-head '{' member-specification[opt] '}' attributes[opt] 911/// class-head: 912/// class-key identifier[opt] base-clause[opt] 913/// class-key nested-name-specifier identifier base-clause[opt] 914/// class-key nested-name-specifier[opt] simple-template-id 915/// base-clause[opt] 916/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] 917/// [GNU] class-key attributes[opt] nested-name-specifier 918/// identifier base-clause[opt] 919/// [GNU] class-key attributes[opt] nested-name-specifier[opt] 920/// simple-template-id base-clause[opt] 921/// class-key: 922/// 'class' 923/// 'struct' 924/// 'union' 925/// 926/// elaborated-type-specifier: [C++ dcl.type.elab] 927/// class-key ::[opt] nested-name-specifier[opt] identifier 928/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] 929/// simple-template-id 930/// 931/// Note that the C++ class-specifier and elaborated-type-specifier, 932/// together, subsume the C99 struct-or-union-specifier: 933/// 934/// struct-or-union-specifier: [C99 6.7.2.1] 935/// struct-or-union identifier[opt] '{' struct-contents '}' 936/// struct-or-union identifier 937/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents 938/// '}' attributes[opt] 939/// [GNU] struct-or-union attributes[opt] identifier 940/// struct-or-union: 941/// 'struct' 942/// 'union' 943void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, 944 SourceLocation StartLoc, DeclSpec &DS, 945 const ParsedTemplateInfo &TemplateInfo, 946 AccessSpecifier AS, 947 bool EnteringContext, DeclSpecContext DSC) { 948 DeclSpec::TST TagType; 949 if (TagTokKind == tok::kw_struct) 950 TagType = DeclSpec::TST_struct; 951 else if (TagTokKind == tok::kw_class) 952 TagType = DeclSpec::TST_class; 953 else { 954 assert(TagTokKind == tok::kw_union && "Not a class specifier"); 955 TagType = DeclSpec::TST_union; 956 } 957 958 if (Tok.is(tok::code_completion)) { 959 // Code completion for a struct, class, or union name. 960 Actions.CodeCompleteTag(getCurScope(), TagType); 961 return cutOffParsing(); 962 } 963 964 // C++03 [temp.explicit] 14.7.2/8: 965 // The usual access checking rules do not apply to names used to specify 966 // explicit instantiations. 967 // 968 // As an extension we do not perform access checking on the names used to 969 // specify explicit specializations either. This is important to allow 970 // specializing traits classes for private types. 971 bool SuppressingAccessChecks = false; 972 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation || 973 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization) { 974 Actions.ActOnStartSuppressingAccessChecks(); 975 SuppressingAccessChecks = true; 976 } 977 978 ParsedAttributes attrs(AttrFactory); 979 // If attributes exist after tag, parse them. 980 if (Tok.is(tok::kw___attribute)) 981 ParseGNUAttributes(attrs); 982 983 // If declspecs exist after tag, parse them. 984 while (Tok.is(tok::kw___declspec)) 985 ParseMicrosoftDeclSpec(attrs); 986 987 // If C++0x attributes exist here, parse them. 988 // FIXME: Are we consistent with the ordering of parsing of different 989 // styles of attributes? 990 MaybeParseCXX0XAttributes(attrs); 991 992 if (TagType == DeclSpec::TST_struct && 993 !Tok.is(tok::identifier) && 994 Tok.getIdentifierInfo() && 995 (Tok.is(tok::kw___is_arithmetic) || 996 Tok.is(tok::kw___is_convertible) || 997 Tok.is(tok::kw___is_empty) || 998 Tok.is(tok::kw___is_floating_point) || 999 Tok.is(tok::kw___is_function) || 1000 Tok.is(tok::kw___is_fundamental) || 1001 Tok.is(tok::kw___is_integral) || 1002 Tok.is(tok::kw___is_member_function_pointer) || 1003 Tok.is(tok::kw___is_member_pointer) || 1004 Tok.is(tok::kw___is_pod) || 1005 Tok.is(tok::kw___is_pointer) || 1006 Tok.is(tok::kw___is_same) || 1007 Tok.is(tok::kw___is_scalar) || 1008 Tok.is(tok::kw___is_signed) || 1009 Tok.is(tok::kw___is_unsigned) || 1010 Tok.is(tok::kw___is_void))) { 1011 // GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the 1012 // name of struct templates, but some are keywords in GCC >= 4.3 1013 // and Clang. Therefore, when we see the token sequence "struct 1014 // X", make X into a normal identifier rather than a keyword, to 1015 // allow libstdc++ 4.2 and libc++ to work properly. 1016 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier(); 1017 Tok.setKind(tok::identifier); 1018 } 1019 1020 // Parse the (optional) nested-name-specifier. 1021 CXXScopeSpec &SS = DS.getTypeSpecScope(); 1022 if (getLangOpts().CPlusPlus) { 1023 // "FOO : BAR" is not a potential typo for "FOO::BAR". 1024 ColonProtectionRAIIObject X(*this); 1025 1026 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext)) 1027 DS.SetTypeSpecError(); 1028 if (SS.isSet()) 1029 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) 1030 Diag(Tok, diag::err_expected_ident); 1031 } 1032 1033 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 1034 1035 // Parse the (optional) class name or simple-template-id. 1036 IdentifierInfo *Name = 0; 1037 SourceLocation NameLoc; 1038 TemplateIdAnnotation *TemplateId = 0; 1039 if (Tok.is(tok::identifier)) { 1040 Name = Tok.getIdentifierInfo(); 1041 NameLoc = ConsumeToken(); 1042 1043 if (Tok.is(tok::less) && getLangOpts().CPlusPlus) { 1044 // The name was supposed to refer to a template, but didn't. 1045 // Eat the template argument list and try to continue parsing this as 1046 // a class (or template thereof). 1047 TemplateArgList TemplateArgs; 1048 SourceLocation LAngleLoc, RAngleLoc; 1049 if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, SS, 1050 true, LAngleLoc, 1051 TemplateArgs, RAngleLoc)) { 1052 // We couldn't parse the template argument list at all, so don't 1053 // try to give any location information for the list. 1054 LAngleLoc = RAngleLoc = SourceLocation(); 1055 } 1056 1057 Diag(NameLoc, diag::err_explicit_spec_non_template) 1058 << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 1059 << (TagType == DeclSpec::TST_class? 0 1060 : TagType == DeclSpec::TST_struct? 1 1061 : 2) 1062 << Name 1063 << SourceRange(LAngleLoc, RAngleLoc); 1064 1065 // Strip off the last template parameter list if it was empty, since 1066 // we've removed its template argument list. 1067 if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) { 1068 if (TemplateParams && TemplateParams->size() > 1) { 1069 TemplateParams->pop_back(); 1070 } else { 1071 TemplateParams = 0; 1072 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1073 = ParsedTemplateInfo::NonTemplate; 1074 } 1075 } else if (TemplateInfo.Kind 1076 == ParsedTemplateInfo::ExplicitInstantiation) { 1077 // Pretend this is just a forward declaration. 1078 TemplateParams = 0; 1079 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1080 = ParsedTemplateInfo::NonTemplate; 1081 const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc 1082 = SourceLocation(); 1083 const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc 1084 = SourceLocation(); 1085 } 1086 } 1087 } else if (Tok.is(tok::annot_template_id)) { 1088 TemplateId = takeTemplateIdAnnotation(Tok); 1089 NameLoc = ConsumeToken(); 1090 1091 if (TemplateId->Kind != TNK_Type_template && 1092 TemplateId->Kind != TNK_Dependent_template_name) { 1093 // The template-name in the simple-template-id refers to 1094 // something other than a class template. Give an appropriate 1095 // error message and skip to the ';'. 1096 SourceRange Range(NameLoc); 1097 if (SS.isNotEmpty()) 1098 Range.setBegin(SS.getBeginLoc()); 1099 1100 Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) 1101 << Name << static_cast<int>(TemplateId->Kind) << Range; 1102 1103 DS.SetTypeSpecError(); 1104 SkipUntil(tok::semi, false, true); 1105 if (SuppressingAccessChecks) 1106 Actions.ActOnStopSuppressingAccessChecks(); 1107 1108 return; 1109 } 1110 } 1111 1112 // As soon as we're finished parsing the class's template-id, turn access 1113 // checking back on. 1114 if (SuppressingAccessChecks) 1115 Actions.ActOnStopSuppressingAccessChecks(); 1116 1117 // There are four options here. 1118 // - If we are in a trailing return type, this is always just a reference, 1119 // and we must not try to parse a definition. For instance, 1120 // [] () -> struct S { }; 1121 // does not define a type. 1122 // - If we have 'struct foo {...', 'struct foo :...', 1123 // 'struct foo final :' or 'struct foo final {', then this is a definition. 1124 // - If we have 'struct foo;', then this is either a forward declaration 1125 // or a friend declaration, which have to be treated differently. 1126 // - Otherwise we have something like 'struct foo xyz', a reference. 1127 // However, in type-specifier-seq's, things look like declarations but are 1128 // just references, e.g. 1129 // new struct s; 1130 // or 1131 // &T::operator struct s; 1132 // For these, DSC is DSC_type_specifier. 1133 Sema::TagUseKind TUK; 1134 if (DSC == DSC_trailing) 1135 TUK = Sema::TUK_Reference; 1136 else if (Tok.is(tok::l_brace) || 1137 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1138 (isCXX0XFinalKeyword() && 1139 NextToken().is(tok::l_brace) || NextToken().is(tok::colon))) { 1140 if (DS.isFriendSpecified()) { 1141 // C++ [class.friend]p2: 1142 // A class shall not be defined in a friend declaration. 1143 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type) 1144 << SourceRange(DS.getFriendSpecLoc()); 1145 1146 // Skip everything up to the semicolon, so that this looks like a proper 1147 // friend class (or template thereof) declaration. 1148 SkipUntil(tok::semi, true, true); 1149 TUK = Sema::TUK_Friend; 1150 } else { 1151 // Okay, this is a class definition. 1152 TUK = Sema::TUK_Definition; 1153 } 1154 } else if (Tok.is(tok::semi) && DSC != DSC_type_specifier) 1155 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration; 1156 else 1157 TUK = Sema::TUK_Reference; 1158 1159 if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error || 1160 TUK != Sema::TUK_Definition)) { 1161 if (DS.getTypeSpecType() != DeclSpec::TST_error) { 1162 // We have a declaration or reference to an anonymous class. 1163 Diag(StartLoc, diag::err_anon_type_definition) 1164 << DeclSpec::getSpecifierName(TagType); 1165 } 1166 1167 SkipUntil(tok::comma, true); 1168 return; 1169 } 1170 1171 // Create the tag portion of the class or class template. 1172 DeclResult TagOrTempResult = true; // invalid 1173 TypeResult TypeResult = true; // invalid 1174 1175 bool Owned = false; 1176 if (TemplateId) { 1177 // Explicit specialization, class template partial specialization, 1178 // or explicit instantiation. 1179 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 1180 TemplateId->getTemplateArgs(), 1181 TemplateId->NumArgs); 1182 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1183 TUK == Sema::TUK_Declaration) { 1184 // This is an explicit instantiation of a class template. 1185 TagOrTempResult 1186 = Actions.ActOnExplicitInstantiation(getCurScope(), 1187 TemplateInfo.ExternLoc, 1188 TemplateInfo.TemplateLoc, 1189 TagType, 1190 StartLoc, 1191 SS, 1192 TemplateId->Template, 1193 TemplateId->TemplateNameLoc, 1194 TemplateId->LAngleLoc, 1195 TemplateArgsPtr, 1196 TemplateId->RAngleLoc, 1197 attrs.getList()); 1198 1199 // Friend template-ids are treated as references unless 1200 // they have template headers, in which case they're ill-formed 1201 // (FIXME: "template <class T> friend class A<T>::B<int>;"). 1202 // We diagnose this error in ActOnClassTemplateSpecialization. 1203 } else if (TUK == Sema::TUK_Reference || 1204 (TUK == Sema::TUK_Friend && 1205 TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) { 1206 TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc, 1207 TemplateId->SS, 1208 TemplateId->TemplateKWLoc, 1209 TemplateId->Template, 1210 TemplateId->TemplateNameLoc, 1211 TemplateId->LAngleLoc, 1212 TemplateArgsPtr, 1213 TemplateId->RAngleLoc); 1214 } else { 1215 // This is an explicit specialization or a class template 1216 // partial specialization. 1217 TemplateParameterLists FakedParamLists; 1218 1219 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 1220 // This looks like an explicit instantiation, because we have 1221 // something like 1222 // 1223 // template class Foo<X> 1224 // 1225 // but it actually has a definition. Most likely, this was 1226 // meant to be an explicit specialization, but the user forgot 1227 // the '<>' after 'template'. 1228 assert(TUK == Sema::TUK_Definition && "Expected a definition here"); 1229 1230 SourceLocation LAngleLoc 1231 = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 1232 Diag(TemplateId->TemplateNameLoc, 1233 diag::err_explicit_instantiation_with_definition) 1234 << SourceRange(TemplateInfo.TemplateLoc) 1235 << FixItHint::CreateInsertion(LAngleLoc, "<>"); 1236 1237 // Create a fake template parameter list that contains only 1238 // "template<>", so that we treat this construct as a class 1239 // template specialization. 1240 FakedParamLists.push_back( 1241 Actions.ActOnTemplateParameterList(0, SourceLocation(), 1242 TemplateInfo.TemplateLoc, 1243 LAngleLoc, 1244 0, 0, 1245 LAngleLoc)); 1246 TemplateParams = &FakedParamLists; 1247 } 1248 1249 // Build the class template specialization. 1250 TagOrTempResult 1251 = Actions.ActOnClassTemplateSpecialization(getCurScope(), TagType, TUK, 1252 StartLoc, DS.getModulePrivateSpecLoc(), SS, 1253 TemplateId->Template, 1254 TemplateId->TemplateNameLoc, 1255 TemplateId->LAngleLoc, 1256 TemplateArgsPtr, 1257 TemplateId->RAngleLoc, 1258 attrs.getList(), 1259 MultiTemplateParamsArg(Actions, 1260 TemplateParams? &(*TemplateParams)[0] : 0, 1261 TemplateParams? TemplateParams->size() : 0)); 1262 } 1263 } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1264 TUK == Sema::TUK_Declaration) { 1265 // Explicit instantiation of a member of a class template 1266 // specialization, e.g., 1267 // 1268 // template struct Outer<int>::Inner; 1269 // 1270 TagOrTempResult 1271 = Actions.ActOnExplicitInstantiation(getCurScope(), 1272 TemplateInfo.ExternLoc, 1273 TemplateInfo.TemplateLoc, 1274 TagType, StartLoc, SS, Name, 1275 NameLoc, attrs.getList()); 1276 } else if (TUK == Sema::TUK_Friend && 1277 TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { 1278 TagOrTempResult = 1279 Actions.ActOnTemplatedFriendTag(getCurScope(), DS.getFriendSpecLoc(), 1280 TagType, StartLoc, SS, 1281 Name, NameLoc, attrs.getList(), 1282 MultiTemplateParamsArg(Actions, 1283 TemplateParams? &(*TemplateParams)[0] : 0, 1284 TemplateParams? TemplateParams->size() : 0)); 1285 } else { 1286 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1287 TUK == Sema::TUK_Definition) { 1288 // FIXME: Diagnose this particular error. 1289 } 1290 1291 bool IsDependent = false; 1292 1293 // Don't pass down template parameter lists if this is just a tag 1294 // reference. For example, we don't need the template parameters here: 1295 // template <class T> class A *makeA(T t); 1296 MultiTemplateParamsArg TParams; 1297 if (TUK != Sema::TUK_Reference && TemplateParams) 1298 TParams = 1299 MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size()); 1300 1301 // Declaration or definition of a class type 1302 TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc, 1303 SS, Name, NameLoc, attrs.getList(), AS, 1304 DS.getModulePrivateSpecLoc(), 1305 TParams, Owned, IsDependent, 1306 SourceLocation(), false, 1307 clang::TypeResult()); 1308 1309 // If ActOnTag said the type was dependent, try again with the 1310 // less common call. 1311 if (IsDependent) { 1312 assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend); 1313 TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK, 1314 SS, Name, StartLoc, NameLoc); 1315 } 1316 } 1317 1318 // If there is a body, parse it and inform the actions module. 1319 if (TUK == Sema::TUK_Definition) { 1320 assert(Tok.is(tok::l_brace) || 1321 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1322 isCXX0XFinalKeyword()); 1323 if (getLangOpts().CPlusPlus) 1324 ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); 1325 else 1326 ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); 1327 } 1328 1329 const char *PrevSpec = 0; 1330 unsigned DiagID; 1331 bool Result; 1332 if (!TypeResult.isInvalid()) { 1333 Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, 1334 NameLoc.isValid() ? NameLoc : StartLoc, 1335 PrevSpec, DiagID, TypeResult.get()); 1336 } else if (!TagOrTempResult.isInvalid()) { 1337 Result = DS.SetTypeSpecType(TagType, StartLoc, 1338 NameLoc.isValid() ? NameLoc : StartLoc, 1339 PrevSpec, DiagID, TagOrTempResult.get(), Owned); 1340 } else { 1341 DS.SetTypeSpecError(); 1342 return; 1343 } 1344 1345 if (Result) 1346 Diag(StartLoc, DiagID) << PrevSpec; 1347 1348 // At this point, we've successfully parsed a class-specifier in 'definition' 1349 // form (e.g. "struct foo { int x; }". While we could just return here, we're 1350 // going to look at what comes after it to improve error recovery. If an 1351 // impossible token occurs next, we assume that the programmer forgot a ; at 1352 // the end of the declaration and recover that way. 1353 // 1354 // This switch enumerates the valid "follow" set for definition. 1355 if (TUK == Sema::TUK_Definition) { 1356 bool ExpectedSemi = true; 1357 switch (Tok.getKind()) { 1358 default: break; 1359 case tok::semi: // struct foo {...} ; 1360 case tok::star: // struct foo {...} * P; 1361 case tok::amp: // struct foo {...} & R = ... 1362 case tok::identifier: // struct foo {...} V ; 1363 case tok::r_paren: //(struct foo {...} ) {4} 1364 case tok::annot_cxxscope: // struct foo {...} a:: b; 1365 case tok::annot_typename: // struct foo {...} a ::b; 1366 case tok::annot_template_id: // struct foo {...} a<int> ::b; 1367 case tok::l_paren: // struct foo {...} ( x); 1368 case tok::comma: // __builtin_offsetof(struct foo{...} , 1369 ExpectedSemi = false; 1370 break; 1371 // Type qualifiers 1372 case tok::kw_const: // struct foo {...} const x; 1373 case tok::kw_volatile: // struct foo {...} volatile x; 1374 case tok::kw_restrict: // struct foo {...} restrict x; 1375 case tok::kw_inline: // struct foo {...} inline foo() {}; 1376 // Storage-class specifiers 1377 case tok::kw_static: // struct foo {...} static x; 1378 case tok::kw_extern: // struct foo {...} extern x; 1379 case tok::kw_typedef: // struct foo {...} typedef x; 1380 case tok::kw_register: // struct foo {...} register x; 1381 case tok::kw_auto: // struct foo {...} auto x; 1382 case tok::kw_mutable: // struct foo {...} mutable x; 1383 case tok::kw_constexpr: // struct foo {...} constexpr x; 1384 // As shown above, type qualifiers and storage class specifiers absolutely 1385 // can occur after class specifiers according to the grammar. However, 1386 // almost no one actually writes code like this. If we see one of these, 1387 // it is much more likely that someone missed a semi colon and the 1388 // type/storage class specifier we're seeing is part of the *next* 1389 // intended declaration, as in: 1390 // 1391 // struct foo { ... } 1392 // typedef int X; 1393 // 1394 // We'd really like to emit a missing semicolon error instead of emitting 1395 // an error on the 'int' saying that you can't have two type specifiers in 1396 // the same declaration of X. Because of this, we look ahead past this 1397 // token to see if it's a type specifier. If so, we know the code is 1398 // otherwise invalid, so we can produce the expected semi error. 1399 if (!isKnownToBeTypeSpecifier(NextToken())) 1400 ExpectedSemi = false; 1401 break; 1402 1403 case tok::r_brace: // struct bar { struct foo {...} } 1404 // Missing ';' at end of struct is accepted as an extension in C mode. 1405 if (!getLangOpts().CPlusPlus) 1406 ExpectedSemi = false; 1407 break; 1408 } 1409 1410 // C++ [temp]p3 In a template-declaration which defines a class, no 1411 // declarator is permitted. 1412 if (TemplateInfo.Kind) 1413 ExpectedSemi = true; 1414 1415 if (ExpectedSemi) { 1416 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl, 1417 TagType == DeclSpec::TST_class ? "class" 1418 : TagType == DeclSpec::TST_struct? "struct" : "union"); 1419 // Push this token back into the preprocessor and change our current token 1420 // to ';' so that the rest of the code recovers as though there were an 1421 // ';' after the definition. 1422 PP.EnterToken(Tok); 1423 Tok.setKind(tok::semi); 1424 } 1425 } 1426} 1427 1428/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. 1429/// 1430/// base-clause : [C++ class.derived] 1431/// ':' base-specifier-list 1432/// base-specifier-list: 1433/// base-specifier '...'[opt] 1434/// base-specifier-list ',' base-specifier '...'[opt] 1435void Parser::ParseBaseClause(Decl *ClassDecl) { 1436 assert(Tok.is(tok::colon) && "Not a base clause"); 1437 ConsumeToken(); 1438 1439 // Build up an array of parsed base specifiers. 1440 SmallVector<CXXBaseSpecifier *, 8> BaseInfo; 1441 1442 while (true) { 1443 // Parse a base-specifier. 1444 BaseResult Result = ParseBaseSpecifier(ClassDecl); 1445 if (Result.isInvalid()) { 1446 // Skip the rest of this base specifier, up until the comma or 1447 // opening brace. 1448 SkipUntil(tok::comma, tok::l_brace, true, true); 1449 } else { 1450 // Add this to our array of base specifiers. 1451 BaseInfo.push_back(Result.get()); 1452 } 1453 1454 // If the next token is a comma, consume it and keep reading 1455 // base-specifiers. 1456 if (Tok.isNot(tok::comma)) break; 1457 1458 // Consume the comma. 1459 ConsumeToken(); 1460 } 1461 1462 // Attach the base specifiers 1463 Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size()); 1464} 1465 1466/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is 1467/// one entry in the base class list of a class specifier, for example: 1468/// class foo : public bar, virtual private baz { 1469/// 'public bar' and 'virtual private baz' are each base-specifiers. 1470/// 1471/// base-specifier: [C++ class.derived] 1472/// ::[opt] nested-name-specifier[opt] class-name 1473/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] 1474/// base-type-specifier 1475/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] 1476/// base-type-specifier 1477Parser::BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) { 1478 bool IsVirtual = false; 1479 SourceLocation StartLoc = Tok.getLocation(); 1480 1481 // Parse the 'virtual' keyword. 1482 if (Tok.is(tok::kw_virtual)) { 1483 ConsumeToken(); 1484 IsVirtual = true; 1485 } 1486 1487 // Parse an (optional) access specifier. 1488 AccessSpecifier Access = getAccessSpecifierIfPresent(); 1489 if (Access != AS_none) 1490 ConsumeToken(); 1491 1492 // Parse the 'virtual' keyword (again!), in case it came after the 1493 // access specifier. 1494 if (Tok.is(tok::kw_virtual)) { 1495 SourceLocation VirtualLoc = ConsumeToken(); 1496 if (IsVirtual) { 1497 // Complain about duplicate 'virtual' 1498 Diag(VirtualLoc, diag::err_dup_virtual) 1499 << FixItHint::CreateRemoval(VirtualLoc); 1500 } 1501 1502 IsVirtual = true; 1503 } 1504 1505 // Parse the class-name. 1506 SourceLocation EndLocation; 1507 SourceLocation BaseLoc; 1508 TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation); 1509 if (BaseType.isInvalid()) 1510 return true; 1511 1512 // Parse the optional ellipsis (for a pack expansion). The ellipsis is 1513 // actually part of the base-specifier-list grammar productions, but we 1514 // parse it here for convenience. 1515 SourceLocation EllipsisLoc; 1516 if (Tok.is(tok::ellipsis)) 1517 EllipsisLoc = ConsumeToken(); 1518 1519 // Find the complete source range for the base-specifier. 1520 SourceRange Range(StartLoc, EndLocation); 1521 1522 // Notify semantic analysis that we have parsed a complete 1523 // base-specifier. 1524 return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, 1525 BaseType.get(), BaseLoc, EllipsisLoc); 1526} 1527 1528/// getAccessSpecifierIfPresent - Determine whether the next token is 1529/// a C++ access-specifier. 1530/// 1531/// access-specifier: [C++ class.derived] 1532/// 'private' 1533/// 'protected' 1534/// 'public' 1535AccessSpecifier Parser::getAccessSpecifierIfPresent() const { 1536 switch (Tok.getKind()) { 1537 default: return AS_none; 1538 case tok::kw_private: return AS_private; 1539 case tok::kw_protected: return AS_protected; 1540 case tok::kw_public: return AS_public; 1541 } 1542} 1543 1544void Parser::HandleMemberFunctionDefaultArgs(Declarator& DeclaratorInfo, 1545 Decl *ThisDecl) { 1546 // We just declared a member function. If this member function 1547 // has any default arguments, we'll need to parse them later. 1548 LateParsedMethodDeclaration *LateMethod = 0; 1549 DeclaratorChunk::FunctionTypeInfo &FTI 1550 = DeclaratorInfo.getFunctionTypeInfo(); 1551 for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { 1552 if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { 1553 if (!LateMethod) { 1554 // Push this method onto the stack of late-parsed method 1555 // declarations. 1556 LateMethod = new LateParsedMethodDeclaration(this, ThisDecl); 1557 getCurrentClass().LateParsedDeclarations.push_back(LateMethod); 1558 LateMethod->TemplateScope = getCurScope()->isTemplateParamScope(); 1559 1560 // Add all of the parameters prior to this one (they don't 1561 // have default arguments). 1562 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 1563 for (unsigned I = 0; I < ParamIdx; ++I) 1564 LateMethod->DefaultArgs.push_back( 1565 LateParsedDefaultArgument(FTI.ArgInfo[I].Param)); 1566 } 1567 1568 // Add this parameter to the list of parameters (it or may 1569 // not have a default argument). 1570 LateMethod->DefaultArgs.push_back( 1571 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, 1572 FTI.ArgInfo[ParamIdx].DefaultArgTokens)); 1573 } 1574 } 1575} 1576 1577/// isCXX0XVirtSpecifier - Determine whether the given token is a C++0x 1578/// virt-specifier. 1579/// 1580/// virt-specifier: 1581/// override 1582/// final 1583VirtSpecifiers::Specifier Parser::isCXX0XVirtSpecifier(const Token &Tok) const { 1584 if (!getLangOpts().CPlusPlus) 1585 return VirtSpecifiers::VS_None; 1586 1587 if (Tok.is(tok::identifier)) { 1588 IdentifierInfo *II = Tok.getIdentifierInfo(); 1589 1590 // Initialize the contextual keywords. 1591 if (!Ident_final) { 1592 Ident_final = &PP.getIdentifierTable().get("final"); 1593 Ident_override = &PP.getIdentifierTable().get("override"); 1594 } 1595 1596 if (II == Ident_override) 1597 return VirtSpecifiers::VS_Override; 1598 1599 if (II == Ident_final) 1600 return VirtSpecifiers::VS_Final; 1601 } 1602 1603 return VirtSpecifiers::VS_None; 1604} 1605 1606/// ParseOptionalCXX0XVirtSpecifierSeq - Parse a virt-specifier-seq. 1607/// 1608/// virt-specifier-seq: 1609/// virt-specifier 1610/// virt-specifier-seq virt-specifier 1611void Parser::ParseOptionalCXX0XVirtSpecifierSeq(VirtSpecifiers &VS) { 1612 while (true) { 1613 VirtSpecifiers::Specifier Specifier = isCXX0XVirtSpecifier(); 1614 if (Specifier == VirtSpecifiers::VS_None) 1615 return; 1616 1617 // C++ [class.mem]p8: 1618 // A virt-specifier-seq shall contain at most one of each virt-specifier. 1619 const char *PrevSpec = 0; 1620 if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec)) 1621 Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier) 1622 << PrevSpec 1623 << FixItHint::CreateRemoval(Tok.getLocation()); 1624 1625 Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ? 1626 diag::warn_cxx98_compat_override_control_keyword : 1627 diag::ext_override_control_keyword) 1628 << VirtSpecifiers::getSpecifierName(Specifier); 1629 ConsumeToken(); 1630 } 1631} 1632 1633/// isCXX0XFinalKeyword - Determine whether the next token is a C++0x 1634/// contextual 'final' keyword. 1635bool Parser::isCXX0XFinalKeyword() const { 1636 if (!getLangOpts().CPlusPlus) 1637 return false; 1638 1639 if (!Tok.is(tok::identifier)) 1640 return false; 1641 1642 // Initialize the contextual keywords. 1643 if (!Ident_final) { 1644 Ident_final = &PP.getIdentifierTable().get("final"); 1645 Ident_override = &PP.getIdentifierTable().get("override"); 1646 } 1647 1648 return Tok.getIdentifierInfo() == Ident_final; 1649} 1650 1651/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. 1652/// 1653/// member-declaration: 1654/// decl-specifier-seq[opt] member-declarator-list[opt] ';' 1655/// function-definition ';'[opt] 1656/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] 1657/// using-declaration [TODO] 1658/// [C++0x] static_assert-declaration 1659/// template-declaration 1660/// [GNU] '__extension__' member-declaration 1661/// 1662/// member-declarator-list: 1663/// member-declarator 1664/// member-declarator-list ',' member-declarator 1665/// 1666/// member-declarator: 1667/// declarator virt-specifier-seq[opt] pure-specifier[opt] 1668/// declarator constant-initializer[opt] 1669/// [C++11] declarator brace-or-equal-initializer[opt] 1670/// identifier[opt] ':' constant-expression 1671/// 1672/// virt-specifier-seq: 1673/// virt-specifier 1674/// virt-specifier-seq virt-specifier 1675/// 1676/// virt-specifier: 1677/// override 1678/// final 1679/// 1680/// pure-specifier: 1681/// '= 0' 1682/// 1683/// constant-initializer: 1684/// '=' constant-expression 1685/// 1686void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS, 1687 AttributeList *AccessAttrs, 1688 const ParsedTemplateInfo &TemplateInfo, 1689 ParsingDeclRAIIObject *TemplateDiags) { 1690 if (Tok.is(tok::at)) { 1691 if (getLangOpts().ObjC1 && NextToken().isObjCAtKeyword(tok::objc_defs)) 1692 Diag(Tok, diag::err_at_defs_cxx); 1693 else 1694 Diag(Tok, diag::err_at_in_class); 1695 1696 ConsumeToken(); 1697 SkipUntil(tok::r_brace); 1698 return; 1699 } 1700 1701 // Access declarations. 1702 if (!TemplateInfo.Kind && 1703 (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 1704 !TryAnnotateCXXScopeToken() && 1705 Tok.is(tok::annot_cxxscope)) { 1706 bool isAccessDecl = false; 1707 if (NextToken().is(tok::identifier)) 1708 isAccessDecl = GetLookAheadToken(2).is(tok::semi); 1709 else 1710 isAccessDecl = NextToken().is(tok::kw_operator); 1711 1712 if (isAccessDecl) { 1713 // Collect the scope specifier token we annotated earlier. 1714 CXXScopeSpec SS; 1715 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), 1716 /*EnteringContext=*/false); 1717 1718 // Try to parse an unqualified-id. 1719 SourceLocation TemplateKWLoc; 1720 UnqualifiedId Name; 1721 if (ParseUnqualifiedId(SS, false, true, true, ParsedType(), 1722 TemplateKWLoc, Name)) { 1723 SkipUntil(tok::semi); 1724 return; 1725 } 1726 1727 // TODO: recover from mistakenly-qualified operator declarations. 1728 if (ExpectAndConsume(tok::semi, 1729 diag::err_expected_semi_after, 1730 "access declaration", 1731 tok::semi)) 1732 return; 1733 1734 Actions.ActOnUsingDeclaration(getCurScope(), AS, 1735 false, SourceLocation(), 1736 SS, Name, 1737 /* AttrList */ 0, 1738 /* IsTypeName */ false, 1739 SourceLocation()); 1740 return; 1741 } 1742 } 1743 1744 // static_assert-declaration 1745 if (Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) { 1746 // FIXME: Check for templates 1747 SourceLocation DeclEnd; 1748 ParseStaticAssertDeclaration(DeclEnd); 1749 return; 1750 } 1751 1752 if (Tok.is(tok::kw_template)) { 1753 assert(!TemplateInfo.TemplateParams && 1754 "Nested template improperly parsed?"); 1755 SourceLocation DeclEnd; 1756 ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd, 1757 AS, AccessAttrs); 1758 return; 1759 } 1760 1761 // Handle: member-declaration ::= '__extension__' member-declaration 1762 if (Tok.is(tok::kw___extension__)) { 1763 // __extension__ silences extension warnings in the subexpression. 1764 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1765 ConsumeToken(); 1766 return ParseCXXClassMemberDeclaration(AS, AccessAttrs, 1767 TemplateInfo, TemplateDiags); 1768 } 1769 1770 // Don't parse FOO:BAR as if it were a typo for FOO::BAR, in this context it 1771 // is a bitfield. 1772 ColonProtectionRAIIObject X(*this); 1773 1774 ParsedAttributesWithRange attrs(AttrFactory); 1775 // Optional C++0x attribute-specifier 1776 MaybeParseCXX0XAttributes(attrs); 1777 MaybeParseMicrosoftAttributes(attrs); 1778 1779 if (Tok.is(tok::kw_using)) { 1780 ProhibitAttributes(attrs); 1781 1782 // Eat 'using'. 1783 SourceLocation UsingLoc = ConsumeToken(); 1784 1785 if (Tok.is(tok::kw_namespace)) { 1786 Diag(UsingLoc, diag::err_using_namespace_in_class); 1787 SkipUntil(tok::semi, true, true); 1788 } else { 1789 SourceLocation DeclEnd; 1790 // Otherwise, it must be a using-declaration or an alias-declaration. 1791 ParseUsingDeclaration(Declarator::MemberContext, TemplateInfo, 1792 UsingLoc, DeclEnd, AS); 1793 } 1794 return; 1795 } 1796 1797 // Hold late-parsed attributes so we can attach a Decl to them later. 1798 LateParsedAttrList CommonLateParsedAttrs; 1799 1800 // decl-specifier-seq: 1801 // Parse the common declaration-specifiers piece. 1802 ParsingDeclSpec DS(*this, TemplateDiags); 1803 DS.takeAttributesFrom(attrs); 1804 ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class, 1805 &CommonLateParsedAttrs); 1806 1807 MultiTemplateParamsArg TemplateParams(Actions, 1808 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0, 1809 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); 1810 1811 if (Tok.is(tok::semi)) { 1812 ConsumeToken(); 1813 Decl *TheDecl = 1814 Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS, TemplateParams); 1815 DS.complete(TheDecl); 1816 return; 1817 } 1818 1819 ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); 1820 VirtSpecifiers VS; 1821 1822 // Hold late-parsed attributes so we can attach a Decl to them later. 1823 LateParsedAttrList LateParsedAttrs; 1824 1825 SourceLocation EqualLoc; 1826 bool HasInitializer = false; 1827 ExprResult Init; 1828 if (Tok.isNot(tok::colon)) { 1829 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1830 ColonProtectionRAIIObject X(*this); 1831 1832 // Parse the first declarator. 1833 ParseDeclarator(DeclaratorInfo); 1834 // Error parsing the declarator? 1835 if (!DeclaratorInfo.hasName()) { 1836 // If so, skip until the semi-colon or a }. 1837 SkipUntil(tok::r_brace, true, true); 1838 if (Tok.is(tok::semi)) 1839 ConsumeToken(); 1840 return; 1841 } 1842 1843 ParseOptionalCXX0XVirtSpecifierSeq(VS); 1844 1845 // If attributes exist after the declarator, but before an '{', parse them. 1846 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 1847 1848 // MSVC permits pure specifier on inline functions declared at class scope. 1849 // Hence check for =0 before checking for function definition. 1850 if (getLangOpts().MicrosoftExt && Tok.is(tok::equal) && 1851 DeclaratorInfo.isFunctionDeclarator() && 1852 NextToken().is(tok::numeric_constant)) { 1853 EqualLoc = ConsumeToken(); 1854 Init = ParseInitializer(); 1855 if (Init.isInvalid()) 1856 SkipUntil(tok::comma, true, true); 1857 else 1858 HasInitializer = true; 1859 } 1860 1861 FunctionDefinitionKind DefinitionKind = FDK_Declaration; 1862 // function-definition: 1863 // 1864 // In C++11, a non-function declarator followed by an open brace is a 1865 // braced-init-list for an in-class member initialization, not an 1866 // erroneous function definition. 1867 if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus0x) { 1868 DefinitionKind = FDK_Definition; 1869 } else if (DeclaratorInfo.isFunctionDeclarator()) { 1870 if (Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) { 1871 DefinitionKind = FDK_Definition; 1872 } else if (Tok.is(tok::equal)) { 1873 const Token &KW = NextToken(); 1874 if (KW.is(tok::kw_default)) 1875 DefinitionKind = FDK_Defaulted; 1876 else if (KW.is(tok::kw_delete)) 1877 DefinitionKind = FDK_Deleted; 1878 } 1879 } 1880 1881 if (DefinitionKind) { 1882 if (!DeclaratorInfo.isFunctionDeclarator()) { 1883 Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params); 1884 ConsumeBrace(); 1885 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1886 1887 // Consume the optional ';' 1888 if (Tok.is(tok::semi)) 1889 ConsumeToken(); 1890 return; 1891 } 1892 1893 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1894 Diag(DeclaratorInfo.getIdentifierLoc(), 1895 diag::err_function_declared_typedef); 1896 // This recovery skips the entire function body. It would be nice 1897 // to simply call ParseCXXInlineMethodDef() below, however Sema 1898 // assumes the declarator represents a function, not a typedef. 1899 ConsumeBrace(); 1900 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1901 1902 // Consume the optional ';' 1903 if (Tok.is(tok::semi)) 1904 ConsumeToken(); 1905 return; 1906 } 1907 1908 Decl *FunDecl = 1909 ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo, 1910 VS, DefinitionKind, Init); 1911 1912 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 1913 CommonLateParsedAttrs[i]->addDecl(FunDecl); 1914 } 1915 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 1916 LateParsedAttrs[i]->addDecl(FunDecl); 1917 } 1918 LateParsedAttrs.clear(); 1919 1920 // Consume the ';' - it's optional unless we have a delete or default 1921 if (Tok.is(tok::semi)) { 1922 ConsumeToken(); 1923 } 1924 1925 return; 1926 } 1927 } 1928 1929 // member-declarator-list: 1930 // member-declarator 1931 // member-declarator-list ',' member-declarator 1932 1933 SmallVector<Decl *, 8> DeclsInGroup; 1934 ExprResult BitfieldSize; 1935 bool ExpectSemi = true; 1936 1937 while (1) { 1938 // member-declarator: 1939 // declarator pure-specifier[opt] 1940 // declarator brace-or-equal-initializer[opt] 1941 // identifier[opt] ':' constant-expression 1942 if (Tok.is(tok::colon)) { 1943 ConsumeToken(); 1944 BitfieldSize = ParseConstantExpression(); 1945 if (BitfieldSize.isInvalid()) 1946 SkipUntil(tok::comma, true, true); 1947 } 1948 1949 // If a simple-asm-expr is present, parse it. 1950 if (Tok.is(tok::kw_asm)) { 1951 SourceLocation Loc; 1952 ExprResult AsmLabel(ParseSimpleAsm(&Loc)); 1953 if (AsmLabel.isInvalid()) 1954 SkipUntil(tok::comma, true, true); 1955 1956 DeclaratorInfo.setAsmLabel(AsmLabel.release()); 1957 DeclaratorInfo.SetRangeEnd(Loc); 1958 } 1959 1960 // If attributes exist after the declarator, parse them. 1961 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 1962 1963 // FIXME: When g++ adds support for this, we'll need to check whether it 1964 // goes before or after the GNU attributes and __asm__. 1965 ParseOptionalCXX0XVirtSpecifierSeq(VS); 1966 1967 bool HasDeferredInitializer = false; 1968 if ((Tok.is(tok::equal) || Tok.is(tok::l_brace)) && !HasInitializer) { 1969 if (BitfieldSize.get()) { 1970 Diag(Tok, diag::err_bitfield_member_init); 1971 SkipUntil(tok::comma, true, true); 1972 } else { 1973 HasInitializer = true; 1974 HasDeferredInitializer = !DeclaratorInfo.isDeclarationOfFunction() && 1975 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 1976 != DeclSpec::SCS_static && 1977 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 1978 != DeclSpec::SCS_typedef; 1979 } 1980 } 1981 1982 // NOTE: If Sema is the Action module and declarator is an instance field, 1983 // this call will *not* return the created decl; It will return null. 1984 // See Sema::ActOnCXXMemberDeclarator for details. 1985 1986 Decl *ThisDecl = 0; 1987 if (DS.isFriendSpecified()) { 1988 // TODO: handle initializers, bitfields, 'delete' 1989 ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo, 1990 move(TemplateParams)); 1991 } else { 1992 ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, 1993 DeclaratorInfo, 1994 move(TemplateParams), 1995 BitfieldSize.release(), 1996 VS, HasDeferredInitializer); 1997 if (AccessAttrs) 1998 Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs, 1999 false, true); 2000 } 2001 2002 // Set the Decl for any late parsed attributes 2003 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 2004 CommonLateParsedAttrs[i]->addDecl(ThisDecl); 2005 } 2006 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 2007 LateParsedAttrs[i]->addDecl(ThisDecl); 2008 } 2009 LateParsedAttrs.clear(); 2010 2011 // Handle the initializer. 2012 if (HasDeferredInitializer) { 2013 // The initializer was deferred; parse it and cache the tokens. 2014 Diag(Tok, getLangOpts().CPlusPlus0x ? 2015 diag::warn_cxx98_compat_nonstatic_member_init : 2016 diag::ext_nonstatic_member_init); 2017 2018 if (DeclaratorInfo.isArrayOfUnknownBound()) { 2019 // C++0x [dcl.array]p3: An array bound may also be omitted when the 2020 // declarator is followed by an initializer. 2021 // 2022 // A brace-or-equal-initializer for a member-declarator is not an 2023 // initializer in the grammar, so this is ill-formed. 2024 Diag(Tok, diag::err_incomplete_array_member_init); 2025 SkipUntil(tok::comma, true, true); 2026 if (ThisDecl) 2027 // Avoid later warnings about a class member of incomplete type. 2028 ThisDecl->setInvalidDecl(); 2029 } else 2030 ParseCXXNonStaticMemberInitializer(ThisDecl); 2031 } else if (HasInitializer) { 2032 // Normal initializer. 2033 if (!Init.isUsable()) 2034 Init = ParseCXXMemberInitializer(ThisDecl, 2035 DeclaratorInfo.isDeclarationOfFunction(), EqualLoc); 2036 2037 if (Init.isInvalid()) 2038 SkipUntil(tok::comma, true, true); 2039 else if (ThisDecl) 2040 Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(), 2041 DS.getTypeSpecType() == DeclSpec::TST_auto); 2042 } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static) { 2043 // No initializer. 2044 Actions.ActOnUninitializedDecl(ThisDecl, 2045 DS.getTypeSpecType() == DeclSpec::TST_auto); 2046 } 2047 2048 if (ThisDecl) { 2049 Actions.FinalizeDeclaration(ThisDecl); 2050 DeclsInGroup.push_back(ThisDecl); 2051 } 2052 2053 if (DeclaratorInfo.isFunctionDeclarator() && 2054 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2055 != DeclSpec::SCS_typedef) { 2056 HandleMemberFunctionDefaultArgs(DeclaratorInfo, ThisDecl); 2057 } 2058 2059 DeclaratorInfo.complete(ThisDecl); 2060 2061 // If we don't have a comma, it is either the end of the list (a ';') 2062 // or an error, bail out. 2063 if (Tok.isNot(tok::comma)) 2064 break; 2065 2066 // Consume the comma. 2067 SourceLocation CommaLoc = ConsumeToken(); 2068 2069 if (Tok.isAtStartOfLine() && 2070 !MightBeDeclarator(Declarator::MemberContext)) { 2071 // This comma was followed by a line-break and something which can't be 2072 // the start of a declarator. The comma was probably a typo for a 2073 // semicolon. 2074 Diag(CommaLoc, diag::err_expected_semi_declaration) 2075 << FixItHint::CreateReplacement(CommaLoc, ";"); 2076 ExpectSemi = false; 2077 break; 2078 } 2079 2080 // Parse the next declarator. 2081 DeclaratorInfo.clear(); 2082 VS.clear(); 2083 BitfieldSize = true; 2084 Init = true; 2085 HasInitializer = false; 2086 DeclaratorInfo.setCommaLoc(CommaLoc); 2087 2088 // Attributes are only allowed on the second declarator. 2089 MaybeParseGNUAttributes(DeclaratorInfo); 2090 2091 if (Tok.isNot(tok::colon)) 2092 ParseDeclarator(DeclaratorInfo); 2093 } 2094 2095 if (ExpectSemi && 2096 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) { 2097 // Skip to end of block or statement. 2098 SkipUntil(tok::r_brace, true, true); 2099 // If we stopped at a ';', eat it. 2100 if (Tok.is(tok::semi)) ConsumeToken(); 2101 return; 2102 } 2103 2104 Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup.data(), 2105 DeclsInGroup.size()); 2106} 2107 2108/// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer or 2109/// pure-specifier. Also detect and reject any attempted defaulted/deleted 2110/// function definition. The location of the '=', if any, will be placed in 2111/// EqualLoc. 2112/// 2113/// pure-specifier: 2114/// '= 0' 2115/// 2116/// brace-or-equal-initializer: 2117/// '=' initializer-expression 2118/// braced-init-list 2119/// 2120/// initializer-clause: 2121/// assignment-expression 2122/// braced-init-list 2123/// 2124/// defaulted/deleted function-definition: 2125/// '=' 'default' 2126/// '=' 'delete' 2127/// 2128/// Prior to C++0x, the assignment-expression in an initializer-clause must 2129/// be a constant-expression. 2130ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction, 2131 SourceLocation &EqualLoc) { 2132 assert((Tok.is(tok::equal) || Tok.is(tok::l_brace)) 2133 && "Data member initializer not starting with '=' or '{'"); 2134 2135 EnterExpressionEvaluationContext Context(Actions, 2136 Sema::PotentiallyEvaluated, 2137 D); 2138 if (Tok.is(tok::equal)) { 2139 EqualLoc = ConsumeToken(); 2140 if (Tok.is(tok::kw_delete)) { 2141 // In principle, an initializer of '= delete p;' is legal, but it will 2142 // never type-check. It's better to diagnose it as an ill-formed expression 2143 // than as an ill-formed deleted non-function member. 2144 // An initializer of '= delete p, foo' will never be parsed, because 2145 // a top-level comma always ends the initializer expression. 2146 const Token &Next = NextToken(); 2147 if (IsFunction || Next.is(tok::semi) || Next.is(tok::comma) || 2148 Next.is(tok::eof)) { 2149 if (IsFunction) 2150 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration) 2151 << 1 /* delete */; 2152 else 2153 Diag(ConsumeToken(), diag::err_deleted_non_function); 2154 return ExprResult(); 2155 } 2156 } else if (Tok.is(tok::kw_default)) { 2157 if (IsFunction) 2158 Diag(Tok, diag::err_default_delete_in_multiple_declaration) 2159 << 0 /* default */; 2160 else 2161 Diag(ConsumeToken(), diag::err_default_special_members); 2162 return ExprResult(); 2163 } 2164 2165 } 2166 return ParseInitializer(); 2167} 2168 2169/// ParseCXXMemberSpecification - Parse the class definition. 2170/// 2171/// member-specification: 2172/// member-declaration member-specification[opt] 2173/// access-specifier ':' member-specification[opt] 2174/// 2175void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, 2176 unsigned TagType, Decl *TagDecl) { 2177 assert((TagType == DeclSpec::TST_struct || 2178 TagType == DeclSpec::TST_union || 2179 TagType == DeclSpec::TST_class) && "Invalid TagType!"); 2180 2181 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc, 2182 "parsing struct/union/class body"); 2183 2184 // Determine whether this is a non-nested class. Note that local 2185 // classes are *not* considered to be nested classes. 2186 bool NonNestedClass = true; 2187 if (!ClassStack.empty()) { 2188 for (const Scope *S = getCurScope(); S; S = S->getParent()) { 2189 if (S->isClassScope()) { 2190 // We're inside a class scope, so this is a nested class. 2191 NonNestedClass = false; 2192 break; 2193 } 2194 2195 if ((S->getFlags() & Scope::FnScope)) { 2196 // If we're in a function or function template declared in the 2197 // body of a class, then this is a local class rather than a 2198 // nested class. 2199 const Scope *Parent = S->getParent(); 2200 if (Parent->isTemplateParamScope()) 2201 Parent = Parent->getParent(); 2202 if (Parent->isClassScope()) 2203 break; 2204 } 2205 } 2206 } 2207 2208 // Enter a scope for the class. 2209 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); 2210 2211 // Note that we are parsing a new (potentially-nested) class definition. 2212 ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass); 2213 2214 if (TagDecl) 2215 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); 2216 2217 SourceLocation FinalLoc; 2218 2219 // Parse the optional 'final' keyword. 2220 if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) { 2221 assert(isCXX0XFinalKeyword() && "not a class definition"); 2222 FinalLoc = ConsumeToken(); 2223 2224 Diag(FinalLoc, getLangOpts().CPlusPlus0x ? 2225 diag::warn_cxx98_compat_override_control_keyword : 2226 diag::ext_override_control_keyword) << "final"; 2227 } 2228 2229 if (Tok.is(tok::colon)) { 2230 ParseBaseClause(TagDecl); 2231 2232 if (!Tok.is(tok::l_brace)) { 2233 Diag(Tok, diag::err_expected_lbrace_after_base_specifiers); 2234 2235 if (TagDecl) 2236 Actions.ActOnTagDefinitionError(getCurScope(), TagDecl); 2237 return; 2238 } 2239 } 2240 2241 assert(Tok.is(tok::l_brace)); 2242 BalancedDelimiterTracker T(*this, tok::l_brace); 2243 T.consumeOpen(); 2244 2245 if (TagDecl) 2246 Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc, 2247 T.getOpenLocation()); 2248 2249 // C++ 11p3: Members of a class defined with the keyword class are private 2250 // by default. Members of a class defined with the keywords struct or union 2251 // are public by default. 2252 AccessSpecifier CurAS; 2253 if (TagType == DeclSpec::TST_class) 2254 CurAS = AS_private; 2255 else 2256 CurAS = AS_public; 2257 ParsedAttributes AccessAttrs(AttrFactory); 2258 2259 if (TagDecl) { 2260 // While we still have something to read, read the member-declarations. 2261 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 2262 // Each iteration of this loop reads one member-declaration. 2263 2264 if (getLangOpts().MicrosoftExt && (Tok.is(tok::kw___if_exists) || 2265 Tok.is(tok::kw___if_not_exists))) { 2266 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 2267 continue; 2268 } 2269 2270 // Check for extraneous top-level semicolon. 2271 if (Tok.is(tok::semi)) { 2272 Diag(Tok, diag::ext_extra_struct_semi) 2273 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType) 2274 << FixItHint::CreateRemoval(Tok.getLocation()); 2275 ConsumeToken(); 2276 continue; 2277 } 2278 2279 if (Tok.is(tok::annot_pragma_vis)) { 2280 HandlePragmaVisibility(); 2281 continue; 2282 } 2283 2284 if (Tok.is(tok::annot_pragma_pack)) { 2285 HandlePragmaPack(); 2286 continue; 2287 } 2288 2289 AccessSpecifier AS = getAccessSpecifierIfPresent(); 2290 if (AS != AS_none) { 2291 // Current token is a C++ access specifier. 2292 CurAS = AS; 2293 SourceLocation ASLoc = Tok.getLocation(); 2294 unsigned TokLength = Tok.getLength(); 2295 ConsumeToken(); 2296 AccessAttrs.clear(); 2297 MaybeParseGNUAttributes(AccessAttrs); 2298 2299 SourceLocation EndLoc; 2300 if (Tok.is(tok::colon)) { 2301 EndLoc = Tok.getLocation(); 2302 ConsumeToken(); 2303 } else if (Tok.is(tok::semi)) { 2304 EndLoc = Tok.getLocation(); 2305 ConsumeToken(); 2306 Diag(EndLoc, diag::err_expected_colon) 2307 << FixItHint::CreateReplacement(EndLoc, ":"); 2308 } else { 2309 EndLoc = ASLoc.getLocWithOffset(TokLength); 2310 Diag(EndLoc, diag::err_expected_colon) 2311 << FixItHint::CreateInsertion(EndLoc, ":"); 2312 } 2313 2314 if (Actions.ActOnAccessSpecifier(AS, ASLoc, EndLoc, 2315 AccessAttrs.getList())) { 2316 // found another attribute than only annotations 2317 AccessAttrs.clear(); 2318 } 2319 2320 continue; 2321 } 2322 2323 // FIXME: Make sure we don't have a template here. 2324 2325 // Parse all the comma separated declarators. 2326 ParseCXXClassMemberDeclaration(CurAS, AccessAttrs.getList()); 2327 } 2328 2329 T.consumeClose(); 2330 } else { 2331 SkipUntil(tok::r_brace, false, false); 2332 } 2333 2334 // If attributes exist after class contents, parse them. 2335 ParsedAttributes attrs(AttrFactory); 2336 MaybeParseGNUAttributes(attrs); 2337 2338 if (TagDecl) 2339 Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl, 2340 T.getOpenLocation(), 2341 T.getCloseLocation(), 2342 attrs.getList()); 2343 2344 // C++0x [class.mem]p2: Within the class member-specification, the class is 2345 // regarded as complete within function bodies, default arguments, exception- 2346 // specifications, and brace-or-equal-initializers for non-static data 2347 // members (including such things in nested classes). 2348 // 2349 // FIXME: Only function bodies and brace-or-equal-initializers are currently 2350 // handled. Fix the others! 2351 if (TagDecl && NonNestedClass) { 2352 // We are not inside a nested class. This class and its nested classes 2353 // are complete and we can parse the delayed portions of method 2354 // declarations and the lexed inline method definitions, along with any 2355 // delayed attributes. 2356 SourceLocation SavedPrevTokLocation = PrevTokLocation; 2357 ParseLexedAttributes(getCurrentClass()); 2358 ParseLexedMethodDeclarations(getCurrentClass()); 2359 ParseLexedMemberInitializers(getCurrentClass()); 2360 ParseLexedMethodDefs(getCurrentClass()); 2361 PrevTokLocation = SavedPrevTokLocation; 2362 } 2363 2364 if (TagDecl) 2365 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, 2366 T.getCloseLocation()); 2367 2368 // Leave the class scope. 2369 ParsingDef.Pop(); 2370 ClassScope.Exit(); 2371} 2372 2373/// ParseConstructorInitializer - Parse a C++ constructor initializer, 2374/// which explicitly initializes the members or base classes of a 2375/// class (C++ [class.base.init]). For example, the three initializers 2376/// after the ':' in the Derived constructor below: 2377/// 2378/// @code 2379/// class Base { }; 2380/// class Derived : Base { 2381/// int x; 2382/// float f; 2383/// public: 2384/// Derived(float f) : Base(), x(17), f(f) { } 2385/// }; 2386/// @endcode 2387/// 2388/// [C++] ctor-initializer: 2389/// ':' mem-initializer-list 2390/// 2391/// [C++] mem-initializer-list: 2392/// mem-initializer ...[opt] 2393/// mem-initializer ...[opt] , mem-initializer-list 2394void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) { 2395 assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); 2396 2397 // Poison the SEH identifiers so they are flagged as illegal in constructor initializers 2398 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true); 2399 SourceLocation ColonLoc = ConsumeToken(); 2400 2401 SmallVector<CXXCtorInitializer*, 4> MemInitializers; 2402 bool AnyErrors = false; 2403 2404 do { 2405 if (Tok.is(tok::code_completion)) { 2406 Actions.CodeCompleteConstructorInitializer(ConstructorDecl, 2407 MemInitializers.data(), 2408 MemInitializers.size()); 2409 return cutOffParsing(); 2410 } else { 2411 MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); 2412 if (!MemInit.isInvalid()) 2413 MemInitializers.push_back(MemInit.get()); 2414 else 2415 AnyErrors = true; 2416 } 2417 2418 if (Tok.is(tok::comma)) 2419 ConsumeToken(); 2420 else if (Tok.is(tok::l_brace)) 2421 break; 2422 // If the next token looks like a base or member initializer, assume that 2423 // we're just missing a comma. 2424 else if (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) { 2425 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation); 2426 Diag(Loc, diag::err_ctor_init_missing_comma) 2427 << FixItHint::CreateInsertion(Loc, ", "); 2428 } else { 2429 // Skip over garbage, until we get to '{'. Don't eat the '{'. 2430 Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); 2431 SkipUntil(tok::l_brace, true, true); 2432 break; 2433 } 2434 } while (true); 2435 2436 Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, 2437 MemInitializers.data(), MemInitializers.size(), 2438 AnyErrors); 2439} 2440 2441/// ParseMemInitializer - Parse a C++ member initializer, which is 2442/// part of a constructor initializer that explicitly initializes one 2443/// member or base class (C++ [class.base.init]). See 2444/// ParseConstructorInitializer for an example. 2445/// 2446/// [C++] mem-initializer: 2447/// mem-initializer-id '(' expression-list[opt] ')' 2448/// [C++0x] mem-initializer-id braced-init-list 2449/// 2450/// [C++] mem-initializer-id: 2451/// '::'[opt] nested-name-specifier[opt] class-name 2452/// identifier 2453Parser::MemInitResult Parser::ParseMemInitializer(Decl *ConstructorDecl) { 2454 // parse '::'[opt] nested-name-specifier[opt] 2455 CXXScopeSpec SS; 2456 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 2457 ParsedType TemplateTypeTy; 2458 if (Tok.is(tok::annot_template_id)) { 2459 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 2460 if (TemplateId->Kind == TNK_Type_template || 2461 TemplateId->Kind == TNK_Dependent_template_name) { 2462 AnnotateTemplateIdTokenAsType(); 2463 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 2464 TemplateTypeTy = getTypeAnnotation(Tok); 2465 } 2466 } 2467 // Uses of decltype will already have been converted to annot_decltype by 2468 // ParseOptionalCXXScopeSpecifier at this point. 2469 if (!TemplateTypeTy && Tok.isNot(tok::identifier) 2470 && Tok.isNot(tok::annot_decltype)) { 2471 Diag(Tok, diag::err_expected_member_or_base_name); 2472 return true; 2473 } 2474 2475 IdentifierInfo *II = 0; 2476 DeclSpec DS(AttrFactory); 2477 SourceLocation IdLoc = Tok.getLocation(); 2478 if (Tok.is(tok::annot_decltype)) { 2479 // Get the decltype expression, if there is one. 2480 ParseDecltypeSpecifier(DS); 2481 } else { 2482 if (Tok.is(tok::identifier)) 2483 // Get the identifier. This may be a member name or a class name, 2484 // but we'll let the semantic analysis determine which it is. 2485 II = Tok.getIdentifierInfo(); 2486 ConsumeToken(); 2487 } 2488 2489 2490 // Parse the '('. 2491 if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) { 2492 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); 2493 2494 ExprResult InitList = ParseBraceInitializer(); 2495 if (InitList.isInvalid()) 2496 return true; 2497 2498 SourceLocation EllipsisLoc; 2499 if (Tok.is(tok::ellipsis)) 2500 EllipsisLoc = ConsumeToken(); 2501 2502 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2503 TemplateTypeTy, DS, IdLoc, 2504 InitList.take(), EllipsisLoc); 2505 } else if(Tok.is(tok::l_paren)) { 2506 BalancedDelimiterTracker T(*this, tok::l_paren); 2507 T.consumeOpen(); 2508 2509 // Parse the optional expression-list. 2510 ExprVector ArgExprs(Actions); 2511 CommaLocsTy CommaLocs; 2512 if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { 2513 SkipUntil(tok::r_paren); 2514 return true; 2515 } 2516 2517 T.consumeClose(); 2518 2519 SourceLocation EllipsisLoc; 2520 if (Tok.is(tok::ellipsis)) 2521 EllipsisLoc = ConsumeToken(); 2522 2523 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2524 TemplateTypeTy, DS, IdLoc, 2525 T.getOpenLocation(), ArgExprs.take(), 2526 ArgExprs.size(), T.getCloseLocation(), 2527 EllipsisLoc); 2528 } 2529 2530 Diag(Tok, getLangOpts().CPlusPlus0x ? diag::err_expected_lparen_or_lbrace 2531 : diag::err_expected_lparen); 2532 return true; 2533} 2534 2535/// \brief Parse a C++ exception-specification if present (C++0x [except.spec]). 2536/// 2537/// exception-specification: 2538/// dynamic-exception-specification 2539/// noexcept-specification 2540/// 2541/// noexcept-specification: 2542/// 'noexcept' 2543/// 'noexcept' '(' constant-expression ')' 2544ExceptionSpecificationType 2545Parser::MaybeParseExceptionSpecification(SourceRange &SpecificationRange, 2546 SmallVectorImpl<ParsedType> &DynamicExceptions, 2547 SmallVectorImpl<SourceRange> &DynamicExceptionRanges, 2548 ExprResult &NoexceptExpr) { 2549 ExceptionSpecificationType Result = EST_None; 2550 2551 // See if there's a dynamic specification. 2552 if (Tok.is(tok::kw_throw)) { 2553 Result = ParseDynamicExceptionSpecification(SpecificationRange, 2554 DynamicExceptions, 2555 DynamicExceptionRanges); 2556 assert(DynamicExceptions.size() == DynamicExceptionRanges.size() && 2557 "Produced different number of exception types and ranges."); 2558 } 2559 2560 // If there's no noexcept specification, we're done. 2561 if (Tok.isNot(tok::kw_noexcept)) 2562 return Result; 2563 2564 Diag(Tok, diag::warn_cxx98_compat_noexcept_decl); 2565 2566 // If we already had a dynamic specification, parse the noexcept for, 2567 // recovery, but emit a diagnostic and don't store the results. 2568 SourceRange NoexceptRange; 2569 ExceptionSpecificationType NoexceptType = EST_None; 2570 2571 SourceLocation KeywordLoc = ConsumeToken(); 2572 if (Tok.is(tok::l_paren)) { 2573 // There is an argument. 2574 BalancedDelimiterTracker T(*this, tok::l_paren); 2575 T.consumeOpen(); 2576 NoexceptType = EST_ComputedNoexcept; 2577 NoexceptExpr = ParseConstantExpression(); 2578 // The argument must be contextually convertible to bool. We use 2579 // ActOnBooleanCondition for this purpose. 2580 if (!NoexceptExpr.isInvalid()) 2581 NoexceptExpr = Actions.ActOnBooleanCondition(getCurScope(), KeywordLoc, 2582 NoexceptExpr.get()); 2583 T.consumeClose(); 2584 NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation()); 2585 } else { 2586 // There is no argument. 2587 NoexceptType = EST_BasicNoexcept; 2588 NoexceptRange = SourceRange(KeywordLoc, KeywordLoc); 2589 } 2590 2591 if (Result == EST_None) { 2592 SpecificationRange = NoexceptRange; 2593 Result = NoexceptType; 2594 2595 // If there's a dynamic specification after a noexcept specification, 2596 // parse that and ignore the results. 2597 if (Tok.is(tok::kw_throw)) { 2598 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2599 ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions, 2600 DynamicExceptionRanges); 2601 } 2602 } else { 2603 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2604 } 2605 2606 return Result; 2607} 2608 2609/// ParseDynamicExceptionSpecification - Parse a C++ 2610/// dynamic-exception-specification (C++ [except.spec]). 2611/// 2612/// dynamic-exception-specification: 2613/// 'throw' '(' type-id-list [opt] ')' 2614/// [MS] 'throw' '(' '...' ')' 2615/// 2616/// type-id-list: 2617/// type-id ... [opt] 2618/// type-id-list ',' type-id ... [opt] 2619/// 2620ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification( 2621 SourceRange &SpecificationRange, 2622 SmallVectorImpl<ParsedType> &Exceptions, 2623 SmallVectorImpl<SourceRange> &Ranges) { 2624 assert(Tok.is(tok::kw_throw) && "expected throw"); 2625 2626 SpecificationRange.setBegin(ConsumeToken()); 2627 BalancedDelimiterTracker T(*this, tok::l_paren); 2628 if (T.consumeOpen()) { 2629 Diag(Tok, diag::err_expected_lparen_after) << "throw"; 2630 SpecificationRange.setEnd(SpecificationRange.getBegin()); 2631 return EST_DynamicNone; 2632 } 2633 2634 // Parse throw(...), a Microsoft extension that means "this function 2635 // can throw anything". 2636 if (Tok.is(tok::ellipsis)) { 2637 SourceLocation EllipsisLoc = ConsumeToken(); 2638 if (!getLangOpts().MicrosoftExt) 2639 Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); 2640 T.consumeClose(); 2641 SpecificationRange.setEnd(T.getCloseLocation()); 2642 return EST_MSAny; 2643 } 2644 2645 // Parse the sequence of type-ids. 2646 SourceRange Range; 2647 while (Tok.isNot(tok::r_paren)) { 2648 TypeResult Res(ParseTypeName(&Range)); 2649 2650 if (Tok.is(tok::ellipsis)) { 2651 // C++0x [temp.variadic]p5: 2652 // - In a dynamic-exception-specification (15.4); the pattern is a 2653 // type-id. 2654 SourceLocation Ellipsis = ConsumeToken(); 2655 Range.setEnd(Ellipsis); 2656 if (!Res.isInvalid()) 2657 Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis); 2658 } 2659 2660 if (!Res.isInvalid()) { 2661 Exceptions.push_back(Res.get()); 2662 Ranges.push_back(Range); 2663 } 2664 2665 if (Tok.is(tok::comma)) 2666 ConsumeToken(); 2667 else 2668 break; 2669 } 2670 2671 T.consumeClose(); 2672 SpecificationRange.setEnd(T.getCloseLocation()); 2673 return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic; 2674} 2675 2676/// ParseTrailingReturnType - Parse a trailing return type on a new-style 2677/// function declaration. 2678TypeResult Parser::ParseTrailingReturnType(SourceRange &Range) { 2679 assert(Tok.is(tok::arrow) && "expected arrow"); 2680 2681 ConsumeToken(); 2682 2683 return ParseTypeName(&Range, Declarator::TrailingReturnContext); 2684} 2685 2686/// \brief We have just started parsing the definition of a new class, 2687/// so push that class onto our stack of classes that is currently 2688/// being parsed. 2689Sema::ParsingClassState 2690Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass) { 2691 assert((NonNestedClass || !ClassStack.empty()) && 2692 "Nested class without outer class"); 2693 ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass)); 2694 return Actions.PushParsingClass(); 2695} 2696 2697/// \brief Deallocate the given parsed class and all of its nested 2698/// classes. 2699void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { 2700 for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I) 2701 delete Class->LateParsedDeclarations[I]; 2702 delete Class; 2703} 2704 2705/// \brief Pop the top class of the stack of classes that are 2706/// currently being parsed. 2707/// 2708/// This routine should be called when we have finished parsing the 2709/// definition of a class, but have not yet popped the Scope 2710/// associated with the class's definition. 2711/// 2712/// \returns true if the class we've popped is a top-level class, 2713/// false otherwise. 2714void Parser::PopParsingClass(Sema::ParsingClassState state) { 2715 assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); 2716 2717 Actions.PopParsingClass(state); 2718 2719 ParsingClass *Victim = ClassStack.top(); 2720 ClassStack.pop(); 2721 if (Victim->TopLevelClass) { 2722 // Deallocate all of the nested classes of this class, 2723 // recursively: we don't need to keep any of this information. 2724 DeallocateParsedClasses(Victim); 2725 return; 2726 } 2727 assert(!ClassStack.empty() && "Missing top-level class?"); 2728 2729 if (Victim->LateParsedDeclarations.empty()) { 2730 // The victim is a nested class, but we will not need to perform 2731 // any processing after the definition of this class since it has 2732 // no members whose handling was delayed. Therefore, we can just 2733 // remove this nested class. 2734 DeallocateParsedClasses(Victim); 2735 return; 2736 } 2737 2738 // This nested class has some members that will need to be processed 2739 // after the top-level class is completely defined. Therefore, add 2740 // it to the list of nested classes within its parent. 2741 assert(getCurScope()->isClassScope() && "Nested class outside of class scope?"); 2742 ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim)); 2743 Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope(); 2744} 2745 2746/// ParseCXX0XAttributeSpecifier - Parse a C++0x attribute-specifier. Currently 2747/// only parses standard attributes. 2748/// 2749/// [C++0x] attribute-specifier: 2750/// '[' '[' attribute-list ']' ']' 2751/// alignment-specifier 2752/// 2753/// [C++0x] attribute-list: 2754/// attribute[opt] 2755/// attribute-list ',' attribute[opt] 2756/// 2757/// [C++0x] attribute: 2758/// attribute-token attribute-argument-clause[opt] 2759/// 2760/// [C++0x] attribute-token: 2761/// identifier 2762/// attribute-scoped-token 2763/// 2764/// [C++0x] attribute-scoped-token: 2765/// attribute-namespace '::' identifier 2766/// 2767/// [C++0x] attribute-namespace: 2768/// identifier 2769/// 2770/// [C++0x] attribute-argument-clause: 2771/// '(' balanced-token-seq ')' 2772/// 2773/// [C++0x] balanced-token-seq: 2774/// balanced-token 2775/// balanced-token-seq balanced-token 2776/// 2777/// [C++0x] balanced-token: 2778/// '(' balanced-token-seq ')' 2779/// '[' balanced-token-seq ']' 2780/// '{' balanced-token-seq '}' 2781/// any token but '(', ')', '[', ']', '{', or '}' 2782void Parser::ParseCXX0XAttributeSpecifier(ParsedAttributes &attrs, 2783 SourceLocation *endLoc) { 2784 if (Tok.is(tok::kw_alignas)) { 2785 Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas); 2786 ParseAlignmentSpecifier(attrs, endLoc); 2787 return; 2788 } 2789 2790 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) 2791 && "Not a C++0x attribute list"); 2792 2793 Diag(Tok.getLocation(), diag::warn_cxx98_compat_attribute); 2794 2795 ConsumeBracket(); 2796 ConsumeBracket(); 2797 2798 if (Tok.is(tok::comma)) { 2799 Diag(Tok.getLocation(), diag::err_expected_ident); 2800 ConsumeToken(); 2801 } 2802 2803 while (Tok.is(tok::identifier) || Tok.is(tok::comma)) { 2804 // attribute not present 2805 if (Tok.is(tok::comma)) { 2806 ConsumeToken(); 2807 continue; 2808 } 2809 2810 IdentifierInfo *ScopeName = 0, *AttrName = Tok.getIdentifierInfo(); 2811 SourceLocation ScopeLoc, AttrLoc = ConsumeToken(); 2812 2813 // scoped attribute 2814 if (Tok.is(tok::coloncolon)) { 2815 ConsumeToken(); 2816 2817 if (!Tok.is(tok::identifier)) { 2818 Diag(Tok.getLocation(), diag::err_expected_ident); 2819 SkipUntil(tok::r_square, tok::comma, true, true); 2820 continue; 2821 } 2822 2823 ScopeName = AttrName; 2824 ScopeLoc = AttrLoc; 2825 2826 AttrName = Tok.getIdentifierInfo(); 2827 AttrLoc = ConsumeToken(); 2828 } 2829 2830 bool AttrParsed = false; 2831 // No scoped names are supported; ideally we could put all non-standard 2832 // attributes into namespaces. 2833 if (!ScopeName) { 2834 switch(AttributeList::getKind(AttrName)) 2835 { 2836 // No arguments 2837 case AttributeList::AT_carries_dependency: 2838 case AttributeList::AT_noreturn: { 2839 if (Tok.is(tok::l_paren)) { 2840 Diag(Tok.getLocation(), diag::err_cxx0x_attribute_forbids_arguments) 2841 << AttrName->getName(); 2842 break; 2843 } 2844 2845 attrs.addNew(AttrName, AttrLoc, 0, AttrLoc, 0, 2846 SourceLocation(), 0, 0, false, true); 2847 AttrParsed = true; 2848 break; 2849 } 2850 2851 // Silence warnings 2852 default: break; 2853 } 2854 } 2855 2856 // Skip the entire parameter clause, if any 2857 if (!AttrParsed && Tok.is(tok::l_paren)) { 2858 ConsumeParen(); 2859 // SkipUntil maintains the balancedness of tokens. 2860 SkipUntil(tok::r_paren, false); 2861 } 2862 } 2863 2864 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2865 SkipUntil(tok::r_square, false); 2866 if (endLoc) 2867 *endLoc = Tok.getLocation(); 2868 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2869 SkipUntil(tok::r_square, false); 2870} 2871 2872/// ParseCXX0XAttributes - Parse a C++0x attribute-specifier-seq. 2873/// 2874/// attribute-specifier-seq: 2875/// attribute-specifier-seq[opt] attribute-specifier 2876void Parser::ParseCXX0XAttributes(ParsedAttributesWithRange &attrs, 2877 SourceLocation *endLoc) { 2878 SourceLocation StartLoc = Tok.getLocation(), Loc; 2879 if (!endLoc) 2880 endLoc = &Loc; 2881 2882 do { 2883 ParseCXX0XAttributeSpecifier(attrs, endLoc); 2884 } while (isCXX0XAttributeSpecifier()); 2885 2886 attrs.Range = SourceRange(StartLoc, *endLoc); 2887} 2888 2889/// ParseMicrosoftAttributes - Parse a Microsoft attribute [Attr] 2890/// 2891/// [MS] ms-attribute: 2892/// '[' token-seq ']' 2893/// 2894/// [MS] ms-attribute-seq: 2895/// ms-attribute[opt] 2896/// ms-attribute ms-attribute-seq 2897void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs, 2898 SourceLocation *endLoc) { 2899 assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list"); 2900 2901 while (Tok.is(tok::l_square)) { 2902 ConsumeBracket(); 2903 SkipUntil(tok::r_square, true, true); 2904 if (endLoc) *endLoc = Tok.getLocation(); 2905 ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); 2906 } 2907} 2908 2909void Parser::ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType, 2910 AccessSpecifier& CurAS) { 2911 IfExistsCondition Result; 2912 if (ParseMicrosoftIfExistsCondition(Result)) 2913 return; 2914 2915 BalancedDelimiterTracker Braces(*this, tok::l_brace); 2916 if (Braces.consumeOpen()) { 2917 Diag(Tok, diag::err_expected_lbrace); 2918 return; 2919 } 2920 2921 switch (Result.Behavior) { 2922 case IEB_Parse: 2923 // Parse the declarations below. 2924 break; 2925 2926 case IEB_Dependent: 2927 Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists) 2928 << Result.IsIfExists; 2929 // Fall through to skip. 2930 2931 case IEB_Skip: 2932 Braces.skipToEnd(); 2933 return; 2934 } 2935 2936 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 2937 // __if_exists, __if_not_exists can nest. 2938 if ((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists))) { 2939 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 2940 continue; 2941 } 2942 2943 // Check for extraneous top-level semicolon. 2944 if (Tok.is(tok::semi)) { 2945 Diag(Tok, diag::ext_extra_struct_semi) 2946 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType) 2947 << FixItHint::CreateRemoval(Tok.getLocation()); 2948 ConsumeToken(); 2949 continue; 2950 } 2951 2952 AccessSpecifier AS = getAccessSpecifierIfPresent(); 2953 if (AS != AS_none) { 2954 // Current token is a C++ access specifier. 2955 CurAS = AS; 2956 SourceLocation ASLoc = Tok.getLocation(); 2957 ConsumeToken(); 2958 if (Tok.is(tok::colon)) 2959 Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation()); 2960 else 2961 Diag(Tok, diag::err_expected_colon); 2962 ConsumeToken(); 2963 continue; 2964 } 2965 2966 // Parse all the comma separated declarators. 2967 ParseCXXClassMemberDeclaration(CurAS, 0); 2968 } 2969 2970 Braces.consumeClose(); 2971} 2972