ParseDeclCXX.cpp revision 3fe198bf0d6118c7b080c17c3bb28d7c84e458b9
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 ParsedAttributesWithRange attrs(AttrFactory); 448 449 // FIXME: Simply skip the attributes and diagnose, don't bother parsing them. 450 MaybeParseCXX0XAttributes(attrs); 451 ProhibitAttributes(attrs); 452 attrs.clear(); 453 attrs.Range = SourceRange(); 454 455 // Ignore optional 'typename'. 456 // FIXME: This is wrong; we should parse this as a typename-specifier. 457 if (Tok.is(tok::kw_typename)) { 458 TypenameLoc = Tok.getLocation(); 459 ConsumeToken(); 460 IsTypeName = true; 461 } 462 else 463 IsTypeName = false; 464 465 // Parse nested-name-specifier. 466 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 467 468 // Check nested-name specifier. 469 if (SS.isInvalid()) { 470 SkipUntil(tok::semi); 471 return 0; 472 } 473 474 // Parse the unqualified-id. We allow parsing of both constructor and 475 // destructor names and allow the action module to diagnose any semantic 476 // errors. 477 SourceLocation TemplateKWLoc; 478 UnqualifiedId Name; 479 if (ParseUnqualifiedId(SS, 480 /*EnteringContext=*/false, 481 /*AllowDestructorName=*/true, 482 /*AllowConstructorName=*/true, 483 ParsedType(), 484 TemplateKWLoc, 485 Name)) { 486 SkipUntil(tok::semi); 487 return 0; 488 } 489 490 MaybeParseCXX0XAttributes(attrs); 491 492 // Maybe this is an alias-declaration. 493 bool IsAliasDecl = Tok.is(tok::equal); 494 TypeResult TypeAlias; 495 if (IsAliasDecl) { 496 // TODO: Attribute support. C++0x attributes may appear before the equals. 497 // Where can GNU attributes appear? 498 ConsumeToken(); 499 500 Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ? 501 diag::warn_cxx98_compat_alias_declaration : 502 diag::ext_alias_declaration); 503 504 // Type alias templates cannot be specialized. 505 int SpecKind = -1; 506 if (TemplateInfo.Kind == ParsedTemplateInfo::Template && 507 Name.getKind() == UnqualifiedId::IK_TemplateId) 508 SpecKind = 0; 509 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization) 510 SpecKind = 1; 511 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 512 SpecKind = 2; 513 if (SpecKind != -1) { 514 SourceRange Range; 515 if (SpecKind == 0) 516 Range = SourceRange(Name.TemplateId->LAngleLoc, 517 Name.TemplateId->RAngleLoc); 518 else 519 Range = TemplateInfo.getSourceRange(); 520 Diag(Range.getBegin(), diag::err_alias_declaration_specialization) 521 << SpecKind << Range; 522 SkipUntil(tok::semi); 523 return 0; 524 } 525 526 // Name must be an identifier. 527 if (Name.getKind() != UnqualifiedId::IK_Identifier) { 528 Diag(Name.StartLocation, diag::err_alias_declaration_not_identifier); 529 // No removal fixit: can't recover from this. 530 SkipUntil(tok::semi); 531 return 0; 532 } else if (IsTypeName) 533 Diag(TypenameLoc, diag::err_alias_declaration_not_identifier) 534 << FixItHint::CreateRemoval(SourceRange(TypenameLoc, 535 SS.isNotEmpty() ? SS.getEndLoc() : TypenameLoc)); 536 else if (SS.isNotEmpty()) 537 Diag(SS.getBeginLoc(), diag::err_alias_declaration_not_identifier) 538 << FixItHint::CreateRemoval(SS.getRange()); 539 540 TypeAlias = ParseTypeName(0, TemplateInfo.Kind ? 541 Declarator::AliasTemplateContext : 542 Declarator::AliasDeclContext, AS, OwnedType); 543 } else { 544 // C++11 attributes are not allowed on a using-declaration, but GNU ones 545 // are. 546 ProhibitAttributes(attrs); 547 548 // Parse (optional) attributes (most likely GNU strong-using extension). 549 MaybeParseGNUAttributes(attrs); 550 } 551 552 // Eat ';'. 553 DeclEnd = Tok.getLocation(); 554 ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 555 !attrs.empty() ? "attributes list" : 556 IsAliasDecl ? "alias declaration" : "using declaration", 557 tok::semi); 558 559 // Diagnose an attempt to declare a templated using-declaration. 560 // In C++0x, alias-declarations can be templates: 561 // template <...> using id = type; 562 if (TemplateInfo.Kind && !IsAliasDecl) { 563 SourceRange R = TemplateInfo.getSourceRange(); 564 Diag(UsingLoc, diag::err_templated_using_declaration) 565 << R << FixItHint::CreateRemoval(R); 566 567 // Unfortunately, we have to bail out instead of recovering by 568 // ignoring the parameters, just in case the nested name specifier 569 // depends on the parameters. 570 return 0; 571 } 572 573 // "typename" keyword is allowed for identifiers only, 574 // because it may be a type definition. 575 if (IsTypeName && Name.getKind() != UnqualifiedId::IK_Identifier) { 576 Diag(Name.getSourceRange().getBegin(), diag::err_typename_identifiers_only) 577 << FixItHint::CreateRemoval(SourceRange(TypenameLoc)); 578 // Proceed parsing, but reset the IsTypeName flag. 579 IsTypeName = false; 580 } 581 582 if (IsAliasDecl) { 583 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 584 MultiTemplateParamsArg TemplateParamsArg(Actions, 585 TemplateParams ? TemplateParams->data() : 0, 586 TemplateParams ? TemplateParams->size() : 0); 587 // FIXME: Propagate attributes. 588 return Actions.ActOnAliasDeclaration(getCurScope(), AS, TemplateParamsArg, 589 UsingLoc, Name, TypeAlias); 590 } 591 592 return Actions.ActOnUsingDeclaration(getCurScope(), AS, true, UsingLoc, SS, 593 Name, attrs.getList(), 594 IsTypeName, TypenameLoc); 595} 596 597/// ParseStaticAssertDeclaration - Parse C++0x or C11 static_assert-declaration. 598/// 599/// [C++0x] static_assert-declaration: 600/// static_assert ( constant-expression , string-literal ) ; 601/// 602/// [C11] static_assert-declaration: 603/// _Static_assert ( constant-expression , string-literal ) ; 604/// 605Decl *Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){ 606 assert((Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) && 607 "Not a static_assert declaration"); 608 609 if (Tok.is(tok::kw__Static_assert) && !getLangOpts().C11) 610 Diag(Tok, diag::ext_c11_static_assert); 611 if (Tok.is(tok::kw_static_assert)) 612 Diag(Tok, diag::warn_cxx98_compat_static_assert); 613 614 SourceLocation StaticAssertLoc = ConsumeToken(); 615 616 BalancedDelimiterTracker T(*this, tok::l_paren); 617 if (T.consumeOpen()) { 618 Diag(Tok, diag::err_expected_lparen); 619 return 0; 620 } 621 622 ExprResult AssertExpr(ParseConstantExpression()); 623 if (AssertExpr.isInvalid()) { 624 SkipUntil(tok::semi); 625 return 0; 626 } 627 628 if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi)) 629 return 0; 630 631 if (!isTokenStringLiteral()) { 632 Diag(Tok, diag::err_expected_string_literal); 633 SkipUntil(tok::semi); 634 return 0; 635 } 636 637 ExprResult AssertMessage(ParseStringLiteralExpression()); 638 if (AssertMessage.isInvalid()) { 639 SkipUntil(tok::semi); 640 return 0; 641 } 642 643 T.consumeClose(); 644 645 DeclEnd = Tok.getLocation(); 646 ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert); 647 648 return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, 649 AssertExpr.take(), 650 AssertMessage.take(), 651 T.getCloseLocation()); 652} 653 654/// ParseDecltypeSpecifier - Parse a C++0x decltype specifier. 655/// 656/// 'decltype' ( expression ) 657/// 658SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) { 659 assert((Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) 660 && "Not a decltype specifier"); 661 662 663 ExprResult Result; 664 SourceLocation StartLoc = Tok.getLocation(); 665 SourceLocation EndLoc; 666 667 if (Tok.is(tok::annot_decltype)) { 668 Result = getExprAnnotation(Tok); 669 EndLoc = Tok.getAnnotationEndLoc(); 670 ConsumeToken(); 671 if (Result.isInvalid()) { 672 DS.SetTypeSpecError(); 673 return EndLoc; 674 } 675 } else { 676 if (Tok.getIdentifierInfo()->isStr("decltype")) 677 Diag(Tok, diag::warn_cxx98_compat_decltype); 678 679 ConsumeToken(); 680 681 BalancedDelimiterTracker T(*this, tok::l_paren); 682 if (T.expectAndConsume(diag::err_expected_lparen_after, 683 "decltype", tok::r_paren)) { 684 DS.SetTypeSpecError(); 685 return T.getOpenLocation() == Tok.getLocation() ? 686 StartLoc : T.getOpenLocation(); 687 } 688 689 // Parse the expression 690 691 // C++0x [dcl.type.simple]p4: 692 // The operand of the decltype specifier is an unevaluated operand. 693 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated, 694 0, /*IsDecltype=*/true); 695 Result = ParseExpression(); 696 if (Result.isInvalid()) { 697 SkipUntil(tok::r_paren); 698 DS.SetTypeSpecError(); 699 return StartLoc; 700 } 701 702 // Match the ')' 703 T.consumeClose(); 704 if (T.getCloseLocation().isInvalid()) { 705 DS.SetTypeSpecError(); 706 // FIXME: this should return the location of the last token 707 // that was consumed (by "consumeClose()") 708 return T.getCloseLocation(); 709 } 710 711 Result = Actions.ActOnDecltypeExpression(Result.take()); 712 if (Result.isInvalid()) { 713 DS.SetTypeSpecError(); 714 return T.getCloseLocation(); 715 } 716 717 EndLoc = T.getCloseLocation(); 718 } 719 720 const char *PrevSpec = 0; 721 unsigned DiagID; 722 // Check for duplicate type specifiers (e.g. "int decltype(a)"). 723 if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec, 724 DiagID, Result.release())) { 725 Diag(StartLoc, DiagID) << PrevSpec; 726 DS.SetTypeSpecError(); 727 } 728 return EndLoc; 729} 730 731void Parser::AnnotateExistingDecltypeSpecifier(const DeclSpec& DS, 732 SourceLocation StartLoc, 733 SourceLocation EndLoc) { 734 // make sure we have a token we can turn into an annotation token 735 if (PP.isBacktrackEnabled()) 736 PP.RevertCachedTokens(1); 737 else 738 PP.EnterToken(Tok); 739 740 Tok.setKind(tok::annot_decltype); 741 setExprAnnotation(Tok, DS.getTypeSpecType() == TST_decltype ? 742 DS.getRepAsExpr() : ExprResult()); 743 Tok.setAnnotationEndLoc(EndLoc); 744 Tok.setLocation(StartLoc); 745 PP.AnnotateCachedTokens(Tok); 746} 747 748void Parser::ParseUnderlyingTypeSpecifier(DeclSpec &DS) { 749 assert(Tok.is(tok::kw___underlying_type) && 750 "Not an underlying type specifier"); 751 752 SourceLocation StartLoc = ConsumeToken(); 753 BalancedDelimiterTracker T(*this, tok::l_paren); 754 if (T.expectAndConsume(diag::err_expected_lparen_after, 755 "__underlying_type", tok::r_paren)) { 756 return; 757 } 758 759 TypeResult Result = ParseTypeName(); 760 if (Result.isInvalid()) { 761 SkipUntil(tok::r_paren); 762 return; 763 } 764 765 // Match the ')' 766 T.consumeClose(); 767 if (T.getCloseLocation().isInvalid()) 768 return; 769 770 const char *PrevSpec = 0; 771 unsigned DiagID; 772 if (DS.SetTypeSpecType(DeclSpec::TST_underlyingType, StartLoc, PrevSpec, 773 DiagID, Result.release())) 774 Diag(StartLoc, DiagID) << PrevSpec; 775} 776 777/// ParseBaseTypeSpecifier - Parse a C++ base-type-specifier which is either a 778/// class name or decltype-specifier. Note that we only check that the result 779/// names a type; semantic analysis will need to verify that the type names a 780/// class. The result is either a type or null, depending on whether a type 781/// name was found. 782/// 783/// base-type-specifier: [C++ 10.1] 784/// class-or-decltype 785/// class-or-decltype: [C++ 10.1] 786/// nested-name-specifier[opt] class-name 787/// decltype-specifier 788/// class-name: [C++ 9.1] 789/// identifier 790/// simple-template-id 791/// 792Parser::TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc, 793 SourceLocation &EndLocation) { 794 // Ignore attempts to use typename 795 if (Tok.is(tok::kw_typename)) { 796 Diag(Tok, diag::err_expected_class_name_not_template) 797 << FixItHint::CreateRemoval(Tok.getLocation()); 798 ConsumeToken(); 799 } 800 801 // Parse optional nested-name-specifier 802 CXXScopeSpec SS; 803 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 804 805 BaseLoc = Tok.getLocation(); 806 807 // Parse decltype-specifier 808 // tok == kw_decltype is just error recovery, it can only happen when SS 809 // isn't empty 810 if (Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) { 811 if (SS.isNotEmpty()) 812 Diag(SS.getBeginLoc(), diag::err_unexpected_scope_on_base_decltype) 813 << FixItHint::CreateRemoval(SS.getRange()); 814 // Fake up a Declarator to use with ActOnTypeName. 815 DeclSpec DS(AttrFactory); 816 817 EndLocation = ParseDecltypeSpecifier(DS); 818 819 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 820 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 821 } 822 823 // Check whether we have a template-id that names a type. 824 if (Tok.is(tok::annot_template_id)) { 825 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 826 if (TemplateId->Kind == TNK_Type_template || 827 TemplateId->Kind == TNK_Dependent_template_name) { 828 AnnotateTemplateIdTokenAsType(); 829 830 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 831 ParsedType Type = getTypeAnnotation(Tok); 832 EndLocation = Tok.getAnnotationEndLoc(); 833 ConsumeToken(); 834 835 if (Type) 836 return Type; 837 return true; 838 } 839 840 // Fall through to produce an error below. 841 } 842 843 if (Tok.isNot(tok::identifier)) { 844 Diag(Tok, diag::err_expected_class_name); 845 return true; 846 } 847 848 IdentifierInfo *Id = Tok.getIdentifierInfo(); 849 SourceLocation IdLoc = ConsumeToken(); 850 851 if (Tok.is(tok::less)) { 852 // It looks the user intended to write a template-id here, but the 853 // template-name was wrong. Try to fix that. 854 TemplateNameKind TNK = TNK_Type_template; 855 TemplateTy Template; 856 if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, getCurScope(), 857 &SS, Template, TNK)) { 858 Diag(IdLoc, diag::err_unknown_template_name) 859 << Id; 860 } 861 862 if (!Template) 863 return true; 864 865 // Form the template name 866 UnqualifiedId TemplateName; 867 TemplateName.setIdentifier(Id, IdLoc); 868 869 // Parse the full template-id, then turn it into a type. 870 if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(), 871 TemplateName, true)) 872 return true; 873 if (TNK == TNK_Dependent_template_name) 874 AnnotateTemplateIdTokenAsType(); 875 876 // If we didn't end up with a typename token, there's nothing more we 877 // can do. 878 if (Tok.isNot(tok::annot_typename)) 879 return true; 880 881 // Retrieve the type from the annotation token, consume that token, and 882 // return. 883 EndLocation = Tok.getAnnotationEndLoc(); 884 ParsedType Type = getTypeAnnotation(Tok); 885 ConsumeToken(); 886 return Type; 887 } 888 889 // We have an identifier; check whether it is actually a type. 890 IdentifierInfo *CorrectedII = 0; 891 ParsedType Type = Actions.getTypeName(*Id, IdLoc, getCurScope(), &SS, true, 892 false, ParsedType(), 893 /*IsCtorOrDtorName=*/false, 894 /*NonTrivialTypeSourceInfo=*/true, 895 &CorrectedII); 896 if (!Type) { 897 Diag(IdLoc, diag::err_expected_class_name); 898 return true; 899 } 900 901 // Consume the identifier. 902 EndLocation = IdLoc; 903 904 // Fake up a Declarator to use with ActOnTypeName. 905 DeclSpec DS(AttrFactory); 906 DS.SetRangeStart(IdLoc); 907 DS.SetRangeEnd(EndLocation); 908 DS.getTypeSpecScope() = SS; 909 910 const char *PrevSpec = 0; 911 unsigned DiagID; 912 DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type); 913 914 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 915 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 916} 917 918void Parser::ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs) { 919 while (Tok.is(tok::kw___single_inheritance) || 920 Tok.is(tok::kw___multiple_inheritance) || 921 Tok.is(tok::kw___virtual_inheritance)) { 922 IdentifierInfo *AttrName = Tok.getIdentifierInfo(); 923 SourceLocation AttrNameLoc = ConsumeToken(); 924 attrs.addNew(AttrName, AttrNameLoc, 0, AttrNameLoc, 0, 925 SourceLocation(), 0, 0, AttributeList::AS_GNU); 926 } 927} 928 929/// Determine whether the following tokens are valid after a type-specifier 930/// which could be a standalone declaration. This will conservatively return 931/// true if there's any doubt, and is appropriate for insert-';' fixits. 932bool Parser::isValidAfterTypeSpecifier(bool CouldBeBitfield) { 933 // This switch enumerates the valid "follow" set for type-specifiers. 934 switch (Tok.getKind()) { 935 default: break; 936 case tok::semi: // struct foo {...} ; 937 case tok::star: // struct foo {...} * P; 938 case tok::amp: // struct foo {...} & R = ... 939 case tok::identifier: // struct foo {...} V ; 940 case tok::r_paren: //(struct foo {...} ) {4} 941 case tok::annot_cxxscope: // struct foo {...} a:: b; 942 case tok::annot_typename: // struct foo {...} a ::b; 943 case tok::annot_template_id: // struct foo {...} a<int> ::b; 944 case tok::l_paren: // struct foo {...} ( x); 945 case tok::comma: // __builtin_offsetof(struct foo{...} , 946 return true; 947 case tok::colon: 948 return CouldBeBitfield; // enum E { ... } : 2; 949 // Type qualifiers 950 case tok::kw_const: // struct foo {...} const x; 951 case tok::kw_volatile: // struct foo {...} volatile x; 952 case tok::kw_restrict: // struct foo {...} restrict x; 953 case tok::kw_inline: // struct foo {...} inline foo() {}; 954 // Storage-class specifiers 955 case tok::kw_static: // struct foo {...} static x; 956 case tok::kw_extern: // struct foo {...} extern x; 957 case tok::kw_typedef: // struct foo {...} typedef x; 958 case tok::kw_register: // struct foo {...} register x; 959 case tok::kw_auto: // struct foo {...} auto x; 960 case tok::kw_mutable: // struct foo {...} mutable x; 961 case tok::kw_constexpr: // struct foo {...} constexpr x; 962 // As shown above, type qualifiers and storage class specifiers absolutely 963 // can occur after class specifiers according to the grammar. However, 964 // almost no one actually writes code like this. If we see one of these, 965 // it is much more likely that someone missed a semi colon and the 966 // type/storage class specifier we're seeing is part of the *next* 967 // intended declaration, as in: 968 // 969 // struct foo { ... } 970 // typedef int X; 971 // 972 // We'd really like to emit a missing semicolon error instead of emitting 973 // an error on the 'int' saying that you can't have two type specifiers in 974 // the same declaration of X. Because of this, we look ahead past this 975 // token to see if it's a type specifier. If so, we know the code is 976 // otherwise invalid, so we can produce the expected semi error. 977 if (!isKnownToBeTypeSpecifier(NextToken())) 978 return true; 979 break; 980 case tok::r_brace: // struct bar { struct foo {...} } 981 // Missing ';' at end of struct is accepted as an extension in C mode. 982 if (!getLangOpts().CPlusPlus) 983 return true; 984 break; 985 } 986 return false; 987} 988 989/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or 990/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which 991/// until we reach the start of a definition or see a token that 992/// cannot start a definition. 993/// 994/// class-specifier: [C++ class] 995/// class-head '{' member-specification[opt] '}' 996/// class-head '{' member-specification[opt] '}' attributes[opt] 997/// class-head: 998/// class-key identifier[opt] base-clause[opt] 999/// class-key nested-name-specifier identifier base-clause[opt] 1000/// class-key nested-name-specifier[opt] simple-template-id 1001/// base-clause[opt] 1002/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] 1003/// [GNU] class-key attributes[opt] nested-name-specifier 1004/// identifier base-clause[opt] 1005/// [GNU] class-key attributes[opt] nested-name-specifier[opt] 1006/// simple-template-id base-clause[opt] 1007/// class-key: 1008/// 'class' 1009/// 'struct' 1010/// 'union' 1011/// 1012/// elaborated-type-specifier: [C++ dcl.type.elab] 1013/// class-key ::[opt] nested-name-specifier[opt] identifier 1014/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] 1015/// simple-template-id 1016/// 1017/// Note that the C++ class-specifier and elaborated-type-specifier, 1018/// together, subsume the C99 struct-or-union-specifier: 1019/// 1020/// struct-or-union-specifier: [C99 6.7.2.1] 1021/// struct-or-union identifier[opt] '{' struct-contents '}' 1022/// struct-or-union identifier 1023/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents 1024/// '}' attributes[opt] 1025/// [GNU] struct-or-union attributes[opt] identifier 1026/// struct-or-union: 1027/// 'struct' 1028/// 'union' 1029void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, 1030 SourceLocation StartLoc, DeclSpec &DS, 1031 const ParsedTemplateInfo &TemplateInfo, 1032 AccessSpecifier AS, 1033 bool EnteringContext, DeclSpecContext DSC) { 1034 DeclSpec::TST TagType; 1035 if (TagTokKind == tok::kw_struct) 1036 TagType = DeclSpec::TST_struct; 1037 else if (TagTokKind == tok::kw_class) 1038 TagType = DeclSpec::TST_class; 1039 else { 1040 assert(TagTokKind == tok::kw_union && "Not a class specifier"); 1041 TagType = DeclSpec::TST_union; 1042 } 1043 1044 if (Tok.is(tok::code_completion)) { 1045 // Code completion for a struct, class, or union name. 1046 Actions.CodeCompleteTag(getCurScope(), TagType); 1047 return cutOffParsing(); 1048 } 1049 1050 // C++03 [temp.explicit] 14.7.2/8: 1051 // The usual access checking rules do not apply to names used to specify 1052 // explicit instantiations. 1053 // 1054 // As an extension we do not perform access checking on the names used to 1055 // specify explicit specializations either. This is important to allow 1056 // specializing traits classes for private types. 1057 // 1058 // Note that we don't suppress if this turns out to be an elaborated 1059 // type specifier. 1060 bool shouldDelayDiagsInTag = 1061 (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation || 1062 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization); 1063 SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag); 1064 1065 ParsedAttributesWithRange attrs(AttrFactory); 1066 // If attributes exist after tag, parse them. 1067 if (Tok.is(tok::kw___attribute)) 1068 ParseGNUAttributes(attrs); 1069 1070 // If declspecs exist after tag, parse them. 1071 while (Tok.is(tok::kw___declspec)) 1072 ParseMicrosoftDeclSpec(attrs); 1073 1074 // Parse inheritance specifiers. 1075 if (Tok.is(tok::kw___single_inheritance) || 1076 Tok.is(tok::kw___multiple_inheritance) || 1077 Tok.is(tok::kw___virtual_inheritance)) 1078 ParseMicrosoftInheritanceClassAttributes(attrs); 1079 1080 // If C++0x attributes exist here, parse them. 1081 // FIXME: Are we consistent with the ordering of parsing of different 1082 // styles of attributes? 1083 MaybeParseCXX0XAttributes(attrs); 1084 1085 if (TagType == DeclSpec::TST_struct && 1086 !Tok.is(tok::identifier) && 1087 Tok.getIdentifierInfo() && 1088 (Tok.is(tok::kw___is_arithmetic) || 1089 Tok.is(tok::kw___is_convertible) || 1090 Tok.is(tok::kw___is_empty) || 1091 Tok.is(tok::kw___is_floating_point) || 1092 Tok.is(tok::kw___is_function) || 1093 Tok.is(tok::kw___is_fundamental) || 1094 Tok.is(tok::kw___is_integral) || 1095 Tok.is(tok::kw___is_member_function_pointer) || 1096 Tok.is(tok::kw___is_member_pointer) || 1097 Tok.is(tok::kw___is_pod) || 1098 Tok.is(tok::kw___is_pointer) || 1099 Tok.is(tok::kw___is_same) || 1100 Tok.is(tok::kw___is_scalar) || 1101 Tok.is(tok::kw___is_signed) || 1102 Tok.is(tok::kw___is_unsigned) || 1103 Tok.is(tok::kw___is_void))) { 1104 // GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the 1105 // name of struct templates, but some are keywords in GCC >= 4.3 1106 // and Clang. Therefore, when we see the token sequence "struct 1107 // X", make X into a normal identifier rather than a keyword, to 1108 // allow libstdc++ 4.2 and libc++ to work properly. 1109 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier(); 1110 Tok.setKind(tok::identifier); 1111 } 1112 1113 // Parse the (optional) nested-name-specifier. 1114 CXXScopeSpec &SS = DS.getTypeSpecScope(); 1115 if (getLangOpts().CPlusPlus) { 1116 // "FOO : BAR" is not a potential typo for "FOO::BAR". 1117 ColonProtectionRAIIObject X(*this); 1118 1119 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext)) 1120 DS.SetTypeSpecError(); 1121 if (SS.isSet()) 1122 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) 1123 Diag(Tok, diag::err_expected_ident); 1124 } 1125 1126 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 1127 1128 // Parse the (optional) class name or simple-template-id. 1129 IdentifierInfo *Name = 0; 1130 SourceLocation NameLoc; 1131 TemplateIdAnnotation *TemplateId = 0; 1132 if (Tok.is(tok::identifier)) { 1133 Name = Tok.getIdentifierInfo(); 1134 NameLoc = ConsumeToken(); 1135 1136 if (Tok.is(tok::less) && getLangOpts().CPlusPlus) { 1137 // The name was supposed to refer to a template, but didn't. 1138 // Eat the template argument list and try to continue parsing this as 1139 // a class (or template thereof). 1140 TemplateArgList TemplateArgs; 1141 SourceLocation LAngleLoc, RAngleLoc; 1142 if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, SS, 1143 true, LAngleLoc, 1144 TemplateArgs, RAngleLoc)) { 1145 // We couldn't parse the template argument list at all, so don't 1146 // try to give any location information for the list. 1147 LAngleLoc = RAngleLoc = SourceLocation(); 1148 } 1149 1150 Diag(NameLoc, diag::err_explicit_spec_non_template) 1151 << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 1152 << (TagType == DeclSpec::TST_class? 0 1153 : TagType == DeclSpec::TST_struct? 1 1154 : 2) 1155 << Name 1156 << SourceRange(LAngleLoc, RAngleLoc); 1157 1158 // Strip off the last template parameter list if it was empty, since 1159 // we've removed its template argument list. 1160 if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) { 1161 if (TemplateParams && TemplateParams->size() > 1) { 1162 TemplateParams->pop_back(); 1163 } else { 1164 TemplateParams = 0; 1165 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1166 = ParsedTemplateInfo::NonTemplate; 1167 } 1168 } else if (TemplateInfo.Kind 1169 == ParsedTemplateInfo::ExplicitInstantiation) { 1170 // Pretend this is just a forward declaration. 1171 TemplateParams = 0; 1172 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1173 = ParsedTemplateInfo::NonTemplate; 1174 const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc 1175 = SourceLocation(); 1176 const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc 1177 = SourceLocation(); 1178 } 1179 } 1180 } else if (Tok.is(tok::annot_template_id)) { 1181 TemplateId = takeTemplateIdAnnotation(Tok); 1182 NameLoc = ConsumeToken(); 1183 1184 if (TemplateId->Kind != TNK_Type_template && 1185 TemplateId->Kind != TNK_Dependent_template_name) { 1186 // The template-name in the simple-template-id refers to 1187 // something other than a class template. Give an appropriate 1188 // error message and skip to the ';'. 1189 SourceRange Range(NameLoc); 1190 if (SS.isNotEmpty()) 1191 Range.setBegin(SS.getBeginLoc()); 1192 1193 Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) 1194 << Name << static_cast<int>(TemplateId->Kind) << Range; 1195 1196 DS.SetTypeSpecError(); 1197 SkipUntil(tok::semi, false, true); 1198 return; 1199 } 1200 } 1201 1202 // There are four options here. 1203 // - If we are in a trailing return type, this is always just a reference, 1204 // and we must not try to parse a definition. For instance, 1205 // [] () -> struct S { }; 1206 // does not define a type. 1207 // - If we have 'struct foo {...', 'struct foo :...', 1208 // 'struct foo final :' or 'struct foo final {', then this is a definition. 1209 // - If we have 'struct foo;', then this is either a forward declaration 1210 // or a friend declaration, which have to be treated differently. 1211 // - Otherwise we have something like 'struct foo xyz', a reference. 1212 // However, in type-specifier-seq's, things look like declarations but are 1213 // just references, e.g. 1214 // new struct s; 1215 // or 1216 // &T::operator struct s; 1217 // For these, DSC is DSC_type_specifier. 1218 Sema::TagUseKind TUK; 1219 if (DSC == DSC_trailing) 1220 TUK = Sema::TUK_Reference; 1221 else if (Tok.is(tok::l_brace) || 1222 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1223 (isCXX0XFinalKeyword() && 1224 (NextToken().is(tok::l_brace) || NextToken().is(tok::colon)))) { 1225 if (DS.isFriendSpecified()) { 1226 // C++ [class.friend]p2: 1227 // A class shall not be defined in a friend declaration. 1228 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type) 1229 << SourceRange(DS.getFriendSpecLoc()); 1230 1231 // Skip everything up to the semicolon, so that this looks like a proper 1232 // friend class (or template thereof) declaration. 1233 SkipUntil(tok::semi, true, true); 1234 TUK = Sema::TUK_Friend; 1235 } else { 1236 // Okay, this is a class definition. 1237 TUK = Sema::TUK_Definition; 1238 } 1239 } else if (DSC != DSC_type_specifier && 1240 (Tok.is(tok::semi) || 1241 (Tok.isAtStartOfLine() && !isValidAfterTypeSpecifier(false)))) { 1242 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration; 1243 if (Tok.isNot(tok::semi)) { 1244 // A semicolon was missing after this declaration. Diagnose and recover. 1245 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl, 1246 TagType == DeclSpec::TST_class ? "class" : 1247 TagType == DeclSpec::TST_struct ? "struct" : "union"); 1248 PP.EnterToken(Tok); 1249 Tok.setKind(tok::semi); 1250 } 1251 } else 1252 TUK = Sema::TUK_Reference; 1253 1254 // If this is an elaborated type specifier, and we delayed 1255 // diagnostics before, just merge them into the current pool. 1256 if (shouldDelayDiagsInTag) { 1257 diagsFromTag.done(); 1258 if (TUK == Sema::TUK_Reference) 1259 diagsFromTag.redelay(); 1260 } 1261 1262 if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error || 1263 TUK != Sema::TUK_Definition)) { 1264 if (DS.getTypeSpecType() != DeclSpec::TST_error) { 1265 // We have a declaration or reference to an anonymous class. 1266 Diag(StartLoc, diag::err_anon_type_definition) 1267 << DeclSpec::getSpecifierName(TagType); 1268 } 1269 1270 SkipUntil(tok::comma, true); 1271 return; 1272 } 1273 1274 // Create the tag portion of the class or class template. 1275 DeclResult TagOrTempResult = true; // invalid 1276 TypeResult TypeResult = true; // invalid 1277 1278 bool Owned = false; 1279 if (TemplateId) { 1280 // Explicit specialization, class template partial specialization, 1281 // or explicit instantiation. 1282 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 1283 TemplateId->getTemplateArgs(), 1284 TemplateId->NumArgs); 1285 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1286 TUK == Sema::TUK_Declaration) { 1287 // This is an explicit instantiation of a class template. 1288 ProhibitAttributes(attrs); 1289 1290 TagOrTempResult 1291 = Actions.ActOnExplicitInstantiation(getCurScope(), 1292 TemplateInfo.ExternLoc, 1293 TemplateInfo.TemplateLoc, 1294 TagType, 1295 StartLoc, 1296 SS, 1297 TemplateId->Template, 1298 TemplateId->TemplateNameLoc, 1299 TemplateId->LAngleLoc, 1300 TemplateArgsPtr, 1301 TemplateId->RAngleLoc, 1302 attrs.getList()); 1303 1304 // Friend template-ids are treated as references unless 1305 // they have template headers, in which case they're ill-formed 1306 // (FIXME: "template <class T> friend class A<T>::B<int>;"). 1307 // We diagnose this error in ActOnClassTemplateSpecialization. 1308 } else if (TUK == Sema::TUK_Reference || 1309 (TUK == Sema::TUK_Friend && 1310 TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) { 1311 ProhibitAttributes(attrs); 1312 TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc, 1313 TemplateId->SS, 1314 TemplateId->TemplateKWLoc, 1315 TemplateId->Template, 1316 TemplateId->TemplateNameLoc, 1317 TemplateId->LAngleLoc, 1318 TemplateArgsPtr, 1319 TemplateId->RAngleLoc); 1320 } else { 1321 // This is an explicit specialization or a class template 1322 // partial specialization. 1323 TemplateParameterLists FakedParamLists; 1324 1325 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 1326 // This looks like an explicit instantiation, because we have 1327 // something like 1328 // 1329 // template class Foo<X> 1330 // 1331 // but it actually has a definition. Most likely, this was 1332 // meant to be an explicit specialization, but the user forgot 1333 // the '<>' after 'template'. 1334 assert(TUK == Sema::TUK_Definition && "Expected a definition here"); 1335 1336 SourceLocation LAngleLoc 1337 = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 1338 Diag(TemplateId->TemplateNameLoc, 1339 diag::err_explicit_instantiation_with_definition) 1340 << SourceRange(TemplateInfo.TemplateLoc) 1341 << FixItHint::CreateInsertion(LAngleLoc, "<>"); 1342 1343 // Create a fake template parameter list that contains only 1344 // "template<>", so that we treat this construct as a class 1345 // template specialization. 1346 FakedParamLists.push_back( 1347 Actions.ActOnTemplateParameterList(0, SourceLocation(), 1348 TemplateInfo.TemplateLoc, 1349 LAngleLoc, 1350 0, 0, 1351 LAngleLoc)); 1352 TemplateParams = &FakedParamLists; 1353 } 1354 1355 // Build the class template specialization. 1356 TagOrTempResult 1357 = Actions.ActOnClassTemplateSpecialization(getCurScope(), TagType, TUK, 1358 StartLoc, DS.getModulePrivateSpecLoc(), SS, 1359 TemplateId->Template, 1360 TemplateId->TemplateNameLoc, 1361 TemplateId->LAngleLoc, 1362 TemplateArgsPtr, 1363 TemplateId->RAngleLoc, 1364 attrs.getList(), 1365 MultiTemplateParamsArg(Actions, 1366 TemplateParams? &(*TemplateParams)[0] : 0, 1367 TemplateParams? TemplateParams->size() : 0)); 1368 } 1369 } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1370 TUK == Sema::TUK_Declaration) { 1371 // Explicit instantiation of a member of a class template 1372 // specialization, e.g., 1373 // 1374 // template struct Outer<int>::Inner; 1375 // 1376 ProhibitAttributes(attrs); 1377 1378 TagOrTempResult 1379 = Actions.ActOnExplicitInstantiation(getCurScope(), 1380 TemplateInfo.ExternLoc, 1381 TemplateInfo.TemplateLoc, 1382 TagType, StartLoc, SS, Name, 1383 NameLoc, attrs.getList()); 1384 } else if (TUK == Sema::TUK_Friend && 1385 TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { 1386 ProhibitAttributes(attrs); 1387 1388 TagOrTempResult = 1389 Actions.ActOnTemplatedFriendTag(getCurScope(), DS.getFriendSpecLoc(), 1390 TagType, StartLoc, SS, 1391 Name, NameLoc, attrs.getList(), 1392 MultiTemplateParamsArg(Actions, 1393 TemplateParams? &(*TemplateParams)[0] : 0, 1394 TemplateParams? TemplateParams->size() : 0)); 1395 } else { 1396 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1397 TUK == Sema::TUK_Definition) { 1398 // FIXME: Diagnose this particular error. 1399 } 1400 1401 if (TUK != Sema::TUK_Declaration && TUK != Sema::TUK_Definition) 1402 ProhibitAttributes(attrs); 1403 1404 bool IsDependent = false; 1405 1406 // Don't pass down template parameter lists if this is just a tag 1407 // reference. For example, we don't need the template parameters here: 1408 // template <class T> class A *makeA(T t); 1409 MultiTemplateParamsArg TParams; 1410 if (TUK != Sema::TUK_Reference && TemplateParams) 1411 TParams = 1412 MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size()); 1413 1414 // Declaration or definition of a class type 1415 TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc, 1416 SS, Name, NameLoc, attrs.getList(), AS, 1417 DS.getModulePrivateSpecLoc(), 1418 TParams, Owned, IsDependent, 1419 SourceLocation(), false, 1420 clang::TypeResult()); 1421 1422 // If ActOnTag said the type was dependent, try again with the 1423 // less common call. 1424 if (IsDependent) { 1425 assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend); 1426 TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK, 1427 SS, Name, StartLoc, NameLoc); 1428 } 1429 } 1430 1431 // If there is a body, parse it and inform the actions module. 1432 if (TUK == Sema::TUK_Definition) { 1433 assert(Tok.is(tok::l_brace) || 1434 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1435 isCXX0XFinalKeyword()); 1436 if (getLangOpts().CPlusPlus) 1437 ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); 1438 else 1439 ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); 1440 } 1441 1442 const char *PrevSpec = 0; 1443 unsigned DiagID; 1444 bool Result; 1445 if (!TypeResult.isInvalid()) { 1446 Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, 1447 NameLoc.isValid() ? NameLoc : StartLoc, 1448 PrevSpec, DiagID, TypeResult.get()); 1449 } else if (!TagOrTempResult.isInvalid()) { 1450 Result = DS.SetTypeSpecType(TagType, StartLoc, 1451 NameLoc.isValid() ? NameLoc : StartLoc, 1452 PrevSpec, DiagID, TagOrTempResult.get(), Owned); 1453 } else { 1454 DS.SetTypeSpecError(); 1455 return; 1456 } 1457 1458 if (Result) 1459 Diag(StartLoc, DiagID) << PrevSpec; 1460 1461 // At this point, we've successfully parsed a class-specifier in 'definition' 1462 // form (e.g. "struct foo { int x; }". While we could just return here, we're 1463 // going to look at what comes after it to improve error recovery. If an 1464 // impossible token occurs next, we assume that the programmer forgot a ; at 1465 // the end of the declaration and recover that way. 1466 // 1467 // Also enforce C++ [temp]p3: 1468 // In a template-declaration which defines a class, no declarator 1469 // is permitted. 1470 if (TUK == Sema::TUK_Definition && 1471 (TemplateInfo.Kind || !isValidAfterTypeSpecifier(false))) { 1472 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl, 1473 TagType == DeclSpec::TST_class ? "class" : 1474 TagType == DeclSpec::TST_struct ? "struct" : "union"); 1475 // Push this token back into the preprocessor and change our current token 1476 // to ';' so that the rest of the code recovers as though there were an 1477 // ';' after the definition. 1478 PP.EnterToken(Tok); 1479 Tok.setKind(tok::semi); 1480 } 1481} 1482 1483/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. 1484/// 1485/// base-clause : [C++ class.derived] 1486/// ':' base-specifier-list 1487/// base-specifier-list: 1488/// base-specifier '...'[opt] 1489/// base-specifier-list ',' base-specifier '...'[opt] 1490void Parser::ParseBaseClause(Decl *ClassDecl) { 1491 assert(Tok.is(tok::colon) && "Not a base clause"); 1492 ConsumeToken(); 1493 1494 // Build up an array of parsed base specifiers. 1495 SmallVector<CXXBaseSpecifier *, 8> BaseInfo; 1496 1497 while (true) { 1498 // Parse a base-specifier. 1499 BaseResult Result = ParseBaseSpecifier(ClassDecl); 1500 if (Result.isInvalid()) { 1501 // Skip the rest of this base specifier, up until the comma or 1502 // opening brace. 1503 SkipUntil(tok::comma, tok::l_brace, true, true); 1504 } else { 1505 // Add this to our array of base specifiers. 1506 BaseInfo.push_back(Result.get()); 1507 } 1508 1509 // If the next token is a comma, consume it and keep reading 1510 // base-specifiers. 1511 if (Tok.isNot(tok::comma)) break; 1512 1513 // Consume the comma. 1514 ConsumeToken(); 1515 } 1516 1517 // Attach the base specifiers 1518 Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size()); 1519} 1520 1521/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is 1522/// one entry in the base class list of a class specifier, for example: 1523/// class foo : public bar, virtual private baz { 1524/// 'public bar' and 'virtual private baz' are each base-specifiers. 1525/// 1526/// base-specifier: [C++ class.derived] 1527/// ::[opt] nested-name-specifier[opt] class-name 1528/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] 1529/// base-type-specifier 1530/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] 1531/// base-type-specifier 1532Parser::BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) { 1533 bool IsVirtual = false; 1534 SourceLocation StartLoc = Tok.getLocation(); 1535 1536 // Parse the 'virtual' keyword. 1537 if (Tok.is(tok::kw_virtual)) { 1538 ConsumeToken(); 1539 IsVirtual = true; 1540 } 1541 1542 // Parse an (optional) access specifier. 1543 AccessSpecifier Access = getAccessSpecifierIfPresent(); 1544 if (Access != AS_none) 1545 ConsumeToken(); 1546 1547 // Parse the 'virtual' keyword (again!), in case it came after the 1548 // access specifier. 1549 if (Tok.is(tok::kw_virtual)) { 1550 SourceLocation VirtualLoc = ConsumeToken(); 1551 if (IsVirtual) { 1552 // Complain about duplicate 'virtual' 1553 Diag(VirtualLoc, diag::err_dup_virtual) 1554 << FixItHint::CreateRemoval(VirtualLoc); 1555 } 1556 1557 IsVirtual = true; 1558 } 1559 1560 // Parse the class-name. 1561 SourceLocation EndLocation; 1562 SourceLocation BaseLoc; 1563 TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation); 1564 if (BaseType.isInvalid()) 1565 return true; 1566 1567 // Parse the optional ellipsis (for a pack expansion). The ellipsis is 1568 // actually part of the base-specifier-list grammar productions, but we 1569 // parse it here for convenience. 1570 SourceLocation EllipsisLoc; 1571 if (Tok.is(tok::ellipsis)) 1572 EllipsisLoc = ConsumeToken(); 1573 1574 // Find the complete source range for the base-specifier. 1575 SourceRange Range(StartLoc, EndLocation); 1576 1577 // Notify semantic analysis that we have parsed a complete 1578 // base-specifier. 1579 return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, 1580 BaseType.get(), BaseLoc, EllipsisLoc); 1581} 1582 1583/// getAccessSpecifierIfPresent - Determine whether the next token is 1584/// a C++ access-specifier. 1585/// 1586/// access-specifier: [C++ class.derived] 1587/// 'private' 1588/// 'protected' 1589/// 'public' 1590AccessSpecifier Parser::getAccessSpecifierIfPresent() const { 1591 switch (Tok.getKind()) { 1592 default: return AS_none; 1593 case tok::kw_private: return AS_private; 1594 case tok::kw_protected: return AS_protected; 1595 case tok::kw_public: return AS_public; 1596 } 1597} 1598 1599/// \brief If the given declarator has any parts for which parsing has to be 1600/// delayed, e.g., default arguments, create a late-parsed method declaration 1601/// record to handle the parsing at the end of the class definition. 1602void Parser::HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo, 1603 Decl *ThisDecl) { 1604 // We just declared a member function. If this member function 1605 // has any default arguments, we'll need to parse them later. 1606 LateParsedMethodDeclaration *LateMethod = 0; 1607 DeclaratorChunk::FunctionTypeInfo &FTI 1608 = DeclaratorInfo.getFunctionTypeInfo(); 1609 1610 for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { 1611 if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { 1612 if (!LateMethod) { 1613 // Push this method onto the stack of late-parsed method 1614 // declarations. 1615 LateMethod = new LateParsedMethodDeclaration(this, ThisDecl); 1616 getCurrentClass().LateParsedDeclarations.push_back(LateMethod); 1617 LateMethod->TemplateScope = getCurScope()->isTemplateParamScope(); 1618 1619 // Add all of the parameters prior to this one (they don't 1620 // have default arguments). 1621 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 1622 for (unsigned I = 0; I < ParamIdx; ++I) 1623 LateMethod->DefaultArgs.push_back( 1624 LateParsedDefaultArgument(FTI.ArgInfo[I].Param)); 1625 } 1626 1627 // Add this parameter to the list of parameters (it may or may 1628 // not have a default argument). 1629 LateMethod->DefaultArgs.push_back( 1630 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, 1631 FTI.ArgInfo[ParamIdx].DefaultArgTokens)); 1632 } 1633 } 1634} 1635 1636/// isCXX0XVirtSpecifier - Determine whether the given token is a C++0x 1637/// virt-specifier. 1638/// 1639/// virt-specifier: 1640/// override 1641/// final 1642VirtSpecifiers::Specifier Parser::isCXX0XVirtSpecifier(const Token &Tok) const { 1643 if (!getLangOpts().CPlusPlus) 1644 return VirtSpecifiers::VS_None; 1645 1646 if (Tok.is(tok::identifier)) { 1647 IdentifierInfo *II = Tok.getIdentifierInfo(); 1648 1649 // Initialize the contextual keywords. 1650 if (!Ident_final) { 1651 Ident_final = &PP.getIdentifierTable().get("final"); 1652 Ident_override = &PP.getIdentifierTable().get("override"); 1653 } 1654 1655 if (II == Ident_override) 1656 return VirtSpecifiers::VS_Override; 1657 1658 if (II == Ident_final) 1659 return VirtSpecifiers::VS_Final; 1660 } 1661 1662 return VirtSpecifiers::VS_None; 1663} 1664 1665/// ParseOptionalCXX0XVirtSpecifierSeq - Parse a virt-specifier-seq. 1666/// 1667/// virt-specifier-seq: 1668/// virt-specifier 1669/// virt-specifier-seq virt-specifier 1670void Parser::ParseOptionalCXX0XVirtSpecifierSeq(VirtSpecifiers &VS) { 1671 while (true) { 1672 VirtSpecifiers::Specifier Specifier = isCXX0XVirtSpecifier(); 1673 if (Specifier == VirtSpecifiers::VS_None) 1674 return; 1675 1676 // C++ [class.mem]p8: 1677 // A virt-specifier-seq shall contain at most one of each virt-specifier. 1678 const char *PrevSpec = 0; 1679 if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec)) 1680 Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier) 1681 << PrevSpec 1682 << FixItHint::CreateRemoval(Tok.getLocation()); 1683 1684 Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ? 1685 diag::warn_cxx98_compat_override_control_keyword : 1686 diag::ext_override_control_keyword) 1687 << VirtSpecifiers::getSpecifierName(Specifier); 1688 ConsumeToken(); 1689 } 1690} 1691 1692/// isCXX0XFinalKeyword - Determine whether the next token is a C++0x 1693/// contextual 'final' keyword. 1694bool Parser::isCXX0XFinalKeyword() const { 1695 if (!getLangOpts().CPlusPlus) 1696 return false; 1697 1698 if (!Tok.is(tok::identifier)) 1699 return false; 1700 1701 // Initialize the contextual keywords. 1702 if (!Ident_final) { 1703 Ident_final = &PP.getIdentifierTable().get("final"); 1704 Ident_override = &PP.getIdentifierTable().get("override"); 1705 } 1706 1707 return Tok.getIdentifierInfo() == Ident_final; 1708} 1709 1710/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. 1711/// 1712/// member-declaration: 1713/// decl-specifier-seq[opt] member-declarator-list[opt] ';' 1714/// function-definition ';'[opt] 1715/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] 1716/// using-declaration [TODO] 1717/// [C++0x] static_assert-declaration 1718/// template-declaration 1719/// [GNU] '__extension__' member-declaration 1720/// 1721/// member-declarator-list: 1722/// member-declarator 1723/// member-declarator-list ',' member-declarator 1724/// 1725/// member-declarator: 1726/// declarator virt-specifier-seq[opt] pure-specifier[opt] 1727/// declarator constant-initializer[opt] 1728/// [C++11] declarator brace-or-equal-initializer[opt] 1729/// identifier[opt] ':' constant-expression 1730/// 1731/// virt-specifier-seq: 1732/// virt-specifier 1733/// virt-specifier-seq virt-specifier 1734/// 1735/// virt-specifier: 1736/// override 1737/// final 1738/// 1739/// pure-specifier: 1740/// '= 0' 1741/// 1742/// constant-initializer: 1743/// '=' constant-expression 1744/// 1745void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS, 1746 AttributeList *AccessAttrs, 1747 const ParsedTemplateInfo &TemplateInfo, 1748 ParsingDeclRAIIObject *TemplateDiags) { 1749 if (Tok.is(tok::at)) { 1750 if (getLangOpts().ObjC1 && NextToken().isObjCAtKeyword(tok::objc_defs)) 1751 Diag(Tok, diag::err_at_defs_cxx); 1752 else 1753 Diag(Tok, diag::err_at_in_class); 1754 1755 ConsumeToken(); 1756 SkipUntil(tok::r_brace); 1757 return; 1758 } 1759 1760 // Access declarations. 1761 bool MalformedTypeSpec = false; 1762 if (!TemplateInfo.Kind && 1763 (Tok.is(tok::identifier) || Tok.is(tok::coloncolon))) { 1764 if (TryAnnotateCXXScopeToken()) 1765 MalformedTypeSpec = true; 1766 1767 bool isAccessDecl; 1768 if (Tok.isNot(tok::annot_cxxscope)) 1769 isAccessDecl = false; 1770 else if (NextToken().is(tok::identifier)) 1771 isAccessDecl = GetLookAheadToken(2).is(tok::semi); 1772 else 1773 isAccessDecl = NextToken().is(tok::kw_operator); 1774 1775 if (isAccessDecl) { 1776 // Collect the scope specifier token we annotated earlier. 1777 CXXScopeSpec SS; 1778 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), 1779 /*EnteringContext=*/false); 1780 1781 // Try to parse an unqualified-id. 1782 SourceLocation TemplateKWLoc; 1783 UnqualifiedId Name; 1784 if (ParseUnqualifiedId(SS, false, true, true, ParsedType(), 1785 TemplateKWLoc, Name)) { 1786 SkipUntil(tok::semi); 1787 return; 1788 } 1789 1790 // TODO: recover from mistakenly-qualified operator declarations. 1791 if (ExpectAndConsume(tok::semi, 1792 diag::err_expected_semi_after, 1793 "access declaration", 1794 tok::semi)) 1795 return; 1796 1797 Actions.ActOnUsingDeclaration(getCurScope(), AS, 1798 false, SourceLocation(), 1799 SS, Name, 1800 /* AttrList */ 0, 1801 /* IsTypeName */ false, 1802 SourceLocation()); 1803 return; 1804 } 1805 } 1806 1807 // static_assert-declaration 1808 if (Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) { 1809 // FIXME: Check for templates 1810 SourceLocation DeclEnd; 1811 ParseStaticAssertDeclaration(DeclEnd); 1812 return; 1813 } 1814 1815 if (Tok.is(tok::kw_template)) { 1816 assert(!TemplateInfo.TemplateParams && 1817 "Nested template improperly parsed?"); 1818 SourceLocation DeclEnd; 1819 ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd, 1820 AS, AccessAttrs); 1821 return; 1822 } 1823 1824 // Handle: member-declaration ::= '__extension__' member-declaration 1825 if (Tok.is(tok::kw___extension__)) { 1826 // __extension__ silences extension warnings in the subexpression. 1827 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1828 ConsumeToken(); 1829 return ParseCXXClassMemberDeclaration(AS, AccessAttrs, 1830 TemplateInfo, TemplateDiags); 1831 } 1832 1833 // Don't parse FOO:BAR as if it were a typo for FOO::BAR, in this context it 1834 // is a bitfield. 1835 ColonProtectionRAIIObject X(*this); 1836 1837 ParsedAttributesWithRange attrs(AttrFactory); 1838 // Optional C++0x attribute-specifier 1839 MaybeParseCXX0XAttributes(attrs); 1840 MaybeParseMicrosoftAttributes(attrs); 1841 1842 if (Tok.is(tok::kw_using)) { 1843 ProhibitAttributes(attrs); 1844 1845 // Eat 'using'. 1846 SourceLocation UsingLoc = ConsumeToken(); 1847 1848 if (Tok.is(tok::kw_namespace)) { 1849 Diag(UsingLoc, diag::err_using_namespace_in_class); 1850 SkipUntil(tok::semi, true, true); 1851 } else { 1852 SourceLocation DeclEnd; 1853 // Otherwise, it must be a using-declaration or an alias-declaration. 1854 ParseUsingDeclaration(Declarator::MemberContext, TemplateInfo, 1855 UsingLoc, DeclEnd, AS); 1856 } 1857 return; 1858 } 1859 1860 // Hold late-parsed attributes so we can attach a Decl to them later. 1861 LateParsedAttrList CommonLateParsedAttrs; 1862 1863 // decl-specifier-seq: 1864 // Parse the common declaration-specifiers piece. 1865 ParsingDeclSpec DS(*this, TemplateDiags); 1866 DS.takeAttributesFrom(attrs); 1867 if (MalformedTypeSpec) 1868 DS.SetTypeSpecError(); 1869 ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class, 1870 &CommonLateParsedAttrs); 1871 1872 MultiTemplateParamsArg TemplateParams(Actions, 1873 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0, 1874 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); 1875 1876 if (Tok.is(tok::semi)) { 1877 ConsumeToken(); 1878 Decl *TheDecl = 1879 Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS, TemplateParams); 1880 DS.complete(TheDecl); 1881 return; 1882 } 1883 1884 ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); 1885 VirtSpecifiers VS; 1886 1887 // Hold late-parsed attributes so we can attach a Decl to them later. 1888 LateParsedAttrList LateParsedAttrs; 1889 1890 SourceLocation EqualLoc; 1891 bool HasInitializer = false; 1892 ExprResult Init; 1893 if (Tok.isNot(tok::colon)) { 1894 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1895 ColonProtectionRAIIObject X(*this); 1896 1897 // Parse the first declarator. 1898 ParseDeclarator(DeclaratorInfo); 1899 // Error parsing the declarator? 1900 if (!DeclaratorInfo.hasName()) { 1901 // If so, skip until the semi-colon or a }. 1902 SkipUntil(tok::r_brace, true, true); 1903 if (Tok.is(tok::semi)) 1904 ConsumeToken(); 1905 return; 1906 } 1907 1908 ParseOptionalCXX0XVirtSpecifierSeq(VS); 1909 1910 // If attributes exist after the declarator, but before an '{', parse them. 1911 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 1912 1913 // MSVC permits pure specifier on inline functions declared at class scope. 1914 // Hence check for =0 before checking for function definition. 1915 if (getLangOpts().MicrosoftExt && Tok.is(tok::equal) && 1916 DeclaratorInfo.isFunctionDeclarator() && 1917 NextToken().is(tok::numeric_constant)) { 1918 EqualLoc = ConsumeToken(); 1919 Init = ParseInitializer(); 1920 if (Init.isInvalid()) 1921 SkipUntil(tok::comma, true, true); 1922 else 1923 HasInitializer = true; 1924 } 1925 1926 FunctionDefinitionKind DefinitionKind = FDK_Declaration; 1927 // function-definition: 1928 // 1929 // In C++11, a non-function declarator followed by an open brace is a 1930 // braced-init-list for an in-class member initialization, not an 1931 // erroneous function definition. 1932 if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus0x) { 1933 DefinitionKind = FDK_Definition; 1934 } else if (DeclaratorInfo.isFunctionDeclarator()) { 1935 if (Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) { 1936 DefinitionKind = FDK_Definition; 1937 } else if (Tok.is(tok::equal)) { 1938 const Token &KW = NextToken(); 1939 if (KW.is(tok::kw_default)) 1940 DefinitionKind = FDK_Defaulted; 1941 else if (KW.is(tok::kw_delete)) 1942 DefinitionKind = FDK_Deleted; 1943 } 1944 } 1945 1946 if (DefinitionKind) { 1947 if (!DeclaratorInfo.isFunctionDeclarator()) { 1948 Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params); 1949 ConsumeBrace(); 1950 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1951 1952 // Consume the optional ';' 1953 if (Tok.is(tok::semi)) 1954 ConsumeToken(); 1955 return; 1956 } 1957 1958 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1959 Diag(DeclaratorInfo.getIdentifierLoc(), 1960 diag::err_function_declared_typedef); 1961 // This recovery skips the entire function body. It would be nice 1962 // to simply call ParseCXXInlineMethodDef() below, however Sema 1963 // assumes the declarator represents a function, not a typedef. 1964 ConsumeBrace(); 1965 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1966 1967 // Consume the optional ';' 1968 if (Tok.is(tok::semi)) 1969 ConsumeToken(); 1970 return; 1971 } 1972 1973 Decl *FunDecl = 1974 ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo, 1975 VS, DefinitionKind, Init); 1976 1977 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 1978 CommonLateParsedAttrs[i]->addDecl(FunDecl); 1979 } 1980 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 1981 LateParsedAttrs[i]->addDecl(FunDecl); 1982 } 1983 LateParsedAttrs.clear(); 1984 1985 // Consume the ';' - it's optional unless we have a delete or default 1986 if (Tok.is(tok::semi)) 1987 ConsumeExtraSemi(AfterMemberFunctionDefinition); 1988 1989 return; 1990 } 1991 } 1992 1993 // member-declarator-list: 1994 // member-declarator 1995 // member-declarator-list ',' member-declarator 1996 1997 SmallVector<Decl *, 8> DeclsInGroup; 1998 ExprResult BitfieldSize; 1999 bool ExpectSemi = true; 2000 2001 while (1) { 2002 // member-declarator: 2003 // declarator pure-specifier[opt] 2004 // declarator brace-or-equal-initializer[opt] 2005 // identifier[opt] ':' constant-expression 2006 if (Tok.is(tok::colon)) { 2007 ConsumeToken(); 2008 BitfieldSize = ParseConstantExpression(); 2009 if (BitfieldSize.isInvalid()) 2010 SkipUntil(tok::comma, true, true); 2011 } 2012 2013 // If a simple-asm-expr is present, parse it. 2014 if (Tok.is(tok::kw_asm)) { 2015 SourceLocation Loc; 2016 ExprResult AsmLabel(ParseSimpleAsm(&Loc)); 2017 if (AsmLabel.isInvalid()) 2018 SkipUntil(tok::comma, true, true); 2019 2020 DeclaratorInfo.setAsmLabel(AsmLabel.release()); 2021 DeclaratorInfo.SetRangeEnd(Loc); 2022 } 2023 2024 // If attributes exist after the declarator, parse them. 2025 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 2026 2027 // FIXME: When g++ adds support for this, we'll need to check whether it 2028 // goes before or after the GNU attributes and __asm__. 2029 ParseOptionalCXX0XVirtSpecifierSeq(VS); 2030 2031 InClassInitStyle HasInClassInit = ICIS_NoInit; 2032 if ((Tok.is(tok::equal) || Tok.is(tok::l_brace)) && !HasInitializer) { 2033 if (BitfieldSize.get()) { 2034 Diag(Tok, diag::err_bitfield_member_init); 2035 SkipUntil(tok::comma, true, true); 2036 } else { 2037 HasInitializer = true; 2038 if (!DeclaratorInfo.isDeclarationOfFunction() && 2039 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2040 != DeclSpec::SCS_static && 2041 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2042 != DeclSpec::SCS_typedef) 2043 HasInClassInit = Tok.is(tok::equal) ? ICIS_CopyInit : ICIS_ListInit; 2044 } 2045 } 2046 2047 // NOTE: If Sema is the Action module and declarator is an instance field, 2048 // this call will *not* return the created decl; It will return null. 2049 // See Sema::ActOnCXXMemberDeclarator for details. 2050 2051 Decl *ThisDecl = 0; 2052 if (DS.isFriendSpecified()) { 2053 // TODO: handle initializers, bitfields, 'delete' 2054 ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo, 2055 TemplateParams); 2056 } else { 2057 ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, 2058 DeclaratorInfo, 2059 TemplateParams, 2060 BitfieldSize.release(), 2061 VS, HasInClassInit); 2062 if (AccessAttrs) 2063 Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs, 2064 false, true); 2065 } 2066 2067 // Set the Decl for any late parsed attributes 2068 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 2069 CommonLateParsedAttrs[i]->addDecl(ThisDecl); 2070 } 2071 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 2072 LateParsedAttrs[i]->addDecl(ThisDecl); 2073 } 2074 LateParsedAttrs.clear(); 2075 2076 // Handle the initializer. 2077 if (HasInClassInit != ICIS_NoInit) { 2078 // The initializer was deferred; parse it and cache the tokens. 2079 Diag(Tok, getLangOpts().CPlusPlus0x ? 2080 diag::warn_cxx98_compat_nonstatic_member_init : 2081 diag::ext_nonstatic_member_init); 2082 2083 if (DeclaratorInfo.isArrayOfUnknownBound()) { 2084 // C++11 [dcl.array]p3: An array bound may also be omitted when the 2085 // declarator is followed by an initializer. 2086 // 2087 // A brace-or-equal-initializer for a member-declarator is not an 2088 // initializer in the grammar, so this is ill-formed. 2089 Diag(Tok, diag::err_incomplete_array_member_init); 2090 SkipUntil(tok::comma, true, true); 2091 if (ThisDecl) 2092 // Avoid later warnings about a class member of incomplete type. 2093 ThisDecl->setInvalidDecl(); 2094 } else 2095 ParseCXXNonStaticMemberInitializer(ThisDecl); 2096 } else if (HasInitializer) { 2097 // Normal initializer. 2098 if (!Init.isUsable()) 2099 Init = ParseCXXMemberInitializer(ThisDecl, 2100 DeclaratorInfo.isDeclarationOfFunction(), EqualLoc); 2101 2102 if (Init.isInvalid()) 2103 SkipUntil(tok::comma, true, true); 2104 else if (ThisDecl) 2105 Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(), 2106 DS.getTypeSpecType() == DeclSpec::TST_auto); 2107 } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static) { 2108 // No initializer. 2109 Actions.ActOnUninitializedDecl(ThisDecl, 2110 DS.getTypeSpecType() == DeclSpec::TST_auto); 2111 } 2112 2113 if (ThisDecl) { 2114 Actions.FinalizeDeclaration(ThisDecl); 2115 DeclsInGroup.push_back(ThisDecl); 2116 } 2117 2118 if (ThisDecl && DeclaratorInfo.isFunctionDeclarator() && 2119 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2120 != DeclSpec::SCS_typedef) { 2121 HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl); 2122 } 2123 2124 DeclaratorInfo.complete(ThisDecl); 2125 2126 // If we don't have a comma, it is either the end of the list (a ';') 2127 // or an error, bail out. 2128 if (Tok.isNot(tok::comma)) 2129 break; 2130 2131 // Consume the comma. 2132 SourceLocation CommaLoc = ConsumeToken(); 2133 2134 if (Tok.isAtStartOfLine() && 2135 !MightBeDeclarator(Declarator::MemberContext)) { 2136 // This comma was followed by a line-break and something which can't be 2137 // the start of a declarator. The comma was probably a typo for a 2138 // semicolon. 2139 Diag(CommaLoc, diag::err_expected_semi_declaration) 2140 << FixItHint::CreateReplacement(CommaLoc, ";"); 2141 ExpectSemi = false; 2142 break; 2143 } 2144 2145 // Parse the next declarator. 2146 DeclaratorInfo.clear(); 2147 VS.clear(); 2148 BitfieldSize = true; 2149 Init = true; 2150 HasInitializer = false; 2151 DeclaratorInfo.setCommaLoc(CommaLoc); 2152 2153 // Attributes are only allowed on the second declarator. 2154 MaybeParseGNUAttributes(DeclaratorInfo); 2155 2156 if (Tok.isNot(tok::colon)) 2157 ParseDeclarator(DeclaratorInfo); 2158 } 2159 2160 if (ExpectSemi && 2161 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) { 2162 // Skip to end of block or statement. 2163 SkipUntil(tok::r_brace, true, true); 2164 // If we stopped at a ';', eat it. 2165 if (Tok.is(tok::semi)) ConsumeToken(); 2166 return; 2167 } 2168 2169 Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup.data(), 2170 DeclsInGroup.size()); 2171} 2172 2173/// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer or 2174/// pure-specifier. Also detect and reject any attempted defaulted/deleted 2175/// function definition. The location of the '=', if any, will be placed in 2176/// EqualLoc. 2177/// 2178/// pure-specifier: 2179/// '= 0' 2180/// 2181/// brace-or-equal-initializer: 2182/// '=' initializer-expression 2183/// braced-init-list 2184/// 2185/// initializer-clause: 2186/// assignment-expression 2187/// braced-init-list 2188/// 2189/// defaulted/deleted function-definition: 2190/// '=' 'default' 2191/// '=' 'delete' 2192/// 2193/// Prior to C++0x, the assignment-expression in an initializer-clause must 2194/// be a constant-expression. 2195ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction, 2196 SourceLocation &EqualLoc) { 2197 assert((Tok.is(tok::equal) || Tok.is(tok::l_brace)) 2198 && "Data member initializer not starting with '=' or '{'"); 2199 2200 EnterExpressionEvaluationContext Context(Actions, 2201 Sema::PotentiallyEvaluated, 2202 D); 2203 if (Tok.is(tok::equal)) { 2204 EqualLoc = ConsumeToken(); 2205 if (Tok.is(tok::kw_delete)) { 2206 // In principle, an initializer of '= delete p;' is legal, but it will 2207 // never type-check. It's better to diagnose it as an ill-formed expression 2208 // than as an ill-formed deleted non-function member. 2209 // An initializer of '= delete p, foo' will never be parsed, because 2210 // a top-level comma always ends the initializer expression. 2211 const Token &Next = NextToken(); 2212 if (IsFunction || Next.is(tok::semi) || Next.is(tok::comma) || 2213 Next.is(tok::eof)) { 2214 if (IsFunction) 2215 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration) 2216 << 1 /* delete */; 2217 else 2218 Diag(ConsumeToken(), diag::err_deleted_non_function); 2219 return ExprResult(); 2220 } 2221 } else if (Tok.is(tok::kw_default)) { 2222 if (IsFunction) 2223 Diag(Tok, diag::err_default_delete_in_multiple_declaration) 2224 << 0 /* default */; 2225 else 2226 Diag(ConsumeToken(), diag::err_default_special_members); 2227 return ExprResult(); 2228 } 2229 2230 } 2231 return ParseInitializer(); 2232} 2233 2234/// ParseCXXMemberSpecification - Parse the class definition. 2235/// 2236/// member-specification: 2237/// member-declaration member-specification[opt] 2238/// access-specifier ':' member-specification[opt] 2239/// 2240void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, 2241 unsigned TagType, Decl *TagDecl) { 2242 assert((TagType == DeclSpec::TST_struct || 2243 TagType == DeclSpec::TST_union || 2244 TagType == DeclSpec::TST_class) && "Invalid TagType!"); 2245 2246 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc, 2247 "parsing struct/union/class body"); 2248 2249 // Determine whether this is a non-nested class. Note that local 2250 // classes are *not* considered to be nested classes. 2251 bool NonNestedClass = true; 2252 if (!ClassStack.empty()) { 2253 for (const Scope *S = getCurScope(); S; S = S->getParent()) { 2254 if (S->isClassScope()) { 2255 // We're inside a class scope, so this is a nested class. 2256 NonNestedClass = false; 2257 break; 2258 } 2259 2260 if ((S->getFlags() & Scope::FnScope)) { 2261 // If we're in a function or function template declared in the 2262 // body of a class, then this is a local class rather than a 2263 // nested class. 2264 const Scope *Parent = S->getParent(); 2265 if (Parent->isTemplateParamScope()) 2266 Parent = Parent->getParent(); 2267 if (Parent->isClassScope()) 2268 break; 2269 } 2270 } 2271 } 2272 2273 // Enter a scope for the class. 2274 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); 2275 2276 // Note that we are parsing a new (potentially-nested) class definition. 2277 ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass); 2278 2279 if (TagDecl) 2280 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); 2281 2282 SourceLocation FinalLoc; 2283 2284 // Parse the optional 'final' keyword. 2285 if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) { 2286 assert(isCXX0XFinalKeyword() && "not a class definition"); 2287 FinalLoc = ConsumeToken(); 2288 2289 Diag(FinalLoc, getLangOpts().CPlusPlus0x ? 2290 diag::warn_cxx98_compat_override_control_keyword : 2291 diag::ext_override_control_keyword) << "final"; 2292 } 2293 2294 if (Tok.is(tok::colon)) { 2295 ParseBaseClause(TagDecl); 2296 2297 if (!Tok.is(tok::l_brace)) { 2298 Diag(Tok, diag::err_expected_lbrace_after_base_specifiers); 2299 2300 if (TagDecl) 2301 Actions.ActOnTagDefinitionError(getCurScope(), TagDecl); 2302 return; 2303 } 2304 } 2305 2306 assert(Tok.is(tok::l_brace)); 2307 BalancedDelimiterTracker T(*this, tok::l_brace); 2308 T.consumeOpen(); 2309 2310 if (TagDecl) 2311 Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc, 2312 T.getOpenLocation()); 2313 2314 // C++ 11p3: Members of a class defined with the keyword class are private 2315 // by default. Members of a class defined with the keywords struct or union 2316 // are public by default. 2317 AccessSpecifier CurAS; 2318 if (TagType == DeclSpec::TST_class) 2319 CurAS = AS_private; 2320 else 2321 CurAS = AS_public; 2322 ParsedAttributes AccessAttrs(AttrFactory); 2323 2324 if (TagDecl) { 2325 // While we still have something to read, read the member-declarations. 2326 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 2327 // Each iteration of this loop reads one member-declaration. 2328 2329 if (getLangOpts().MicrosoftExt && (Tok.is(tok::kw___if_exists) || 2330 Tok.is(tok::kw___if_not_exists))) { 2331 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 2332 continue; 2333 } 2334 2335 // Check for extraneous top-level semicolon. 2336 if (Tok.is(tok::semi)) { 2337 ConsumeExtraSemi(InsideStruct, TagType); 2338 continue; 2339 } 2340 2341 if (Tok.is(tok::annot_pragma_vis)) { 2342 HandlePragmaVisibility(); 2343 continue; 2344 } 2345 2346 if (Tok.is(tok::annot_pragma_pack)) { 2347 HandlePragmaPack(); 2348 continue; 2349 } 2350 2351 AccessSpecifier AS = getAccessSpecifierIfPresent(); 2352 if (AS != AS_none) { 2353 // Current token is a C++ access specifier. 2354 CurAS = AS; 2355 SourceLocation ASLoc = Tok.getLocation(); 2356 unsigned TokLength = Tok.getLength(); 2357 ConsumeToken(); 2358 AccessAttrs.clear(); 2359 MaybeParseGNUAttributes(AccessAttrs); 2360 2361 SourceLocation EndLoc; 2362 if (Tok.is(tok::colon)) { 2363 EndLoc = Tok.getLocation(); 2364 ConsumeToken(); 2365 } else if (Tok.is(tok::semi)) { 2366 EndLoc = Tok.getLocation(); 2367 ConsumeToken(); 2368 Diag(EndLoc, diag::err_expected_colon) 2369 << FixItHint::CreateReplacement(EndLoc, ":"); 2370 } else { 2371 EndLoc = ASLoc.getLocWithOffset(TokLength); 2372 Diag(EndLoc, diag::err_expected_colon) 2373 << FixItHint::CreateInsertion(EndLoc, ":"); 2374 } 2375 2376 if (Actions.ActOnAccessSpecifier(AS, ASLoc, EndLoc, 2377 AccessAttrs.getList())) { 2378 // found another attribute than only annotations 2379 AccessAttrs.clear(); 2380 } 2381 2382 continue; 2383 } 2384 2385 // FIXME: Make sure we don't have a template here. 2386 2387 // Parse all the comma separated declarators. 2388 ParseCXXClassMemberDeclaration(CurAS, AccessAttrs.getList()); 2389 } 2390 2391 T.consumeClose(); 2392 } else { 2393 SkipUntil(tok::r_brace, false, false); 2394 } 2395 2396 // If attributes exist after class contents, parse them. 2397 ParsedAttributes attrs(AttrFactory); 2398 MaybeParseGNUAttributes(attrs); 2399 2400 if (TagDecl) 2401 Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl, 2402 T.getOpenLocation(), 2403 T.getCloseLocation(), 2404 attrs.getList()); 2405 2406 // C++11 [class.mem]p2: 2407 // Within the class member-specification, the class is regarded as complete 2408 // within function bodies, default arguments, and 2409 // brace-or-equal-initializers for non-static data members (including such 2410 // things in nested classes). 2411 if (TagDecl && NonNestedClass) { 2412 // We are not inside a nested class. This class and its nested classes 2413 // are complete and we can parse the delayed portions of method 2414 // declarations and the lexed inline method definitions, along with any 2415 // delayed attributes. 2416 SourceLocation SavedPrevTokLocation = PrevTokLocation; 2417 ParseLexedAttributes(getCurrentClass()); 2418 ParseLexedMethodDeclarations(getCurrentClass()); 2419 2420 // We've finished with all pending member declarations. 2421 Actions.ActOnFinishCXXMemberDecls(); 2422 2423 ParseLexedMemberInitializers(getCurrentClass()); 2424 ParseLexedMethodDefs(getCurrentClass()); 2425 PrevTokLocation = SavedPrevTokLocation; 2426 } 2427 2428 if (TagDecl) 2429 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, 2430 T.getCloseLocation()); 2431 2432 // Leave the class scope. 2433 ParsingDef.Pop(); 2434 ClassScope.Exit(); 2435} 2436 2437/// ParseConstructorInitializer - Parse a C++ constructor initializer, 2438/// which explicitly initializes the members or base classes of a 2439/// class (C++ [class.base.init]). For example, the three initializers 2440/// after the ':' in the Derived constructor below: 2441/// 2442/// @code 2443/// class Base { }; 2444/// class Derived : Base { 2445/// int x; 2446/// float f; 2447/// public: 2448/// Derived(float f) : Base(), x(17), f(f) { } 2449/// }; 2450/// @endcode 2451/// 2452/// [C++] ctor-initializer: 2453/// ':' mem-initializer-list 2454/// 2455/// [C++] mem-initializer-list: 2456/// mem-initializer ...[opt] 2457/// mem-initializer ...[opt] , mem-initializer-list 2458void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) { 2459 assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); 2460 2461 // Poison the SEH identifiers so they are flagged as illegal in constructor initializers 2462 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true); 2463 SourceLocation ColonLoc = ConsumeToken(); 2464 2465 SmallVector<CXXCtorInitializer*, 4> MemInitializers; 2466 bool AnyErrors = false; 2467 2468 do { 2469 if (Tok.is(tok::code_completion)) { 2470 Actions.CodeCompleteConstructorInitializer(ConstructorDecl, 2471 MemInitializers.data(), 2472 MemInitializers.size()); 2473 return cutOffParsing(); 2474 } else { 2475 MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); 2476 if (!MemInit.isInvalid()) 2477 MemInitializers.push_back(MemInit.get()); 2478 else 2479 AnyErrors = true; 2480 } 2481 2482 if (Tok.is(tok::comma)) 2483 ConsumeToken(); 2484 else if (Tok.is(tok::l_brace)) 2485 break; 2486 // If the next token looks like a base or member initializer, assume that 2487 // we're just missing a comma. 2488 else if (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) { 2489 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation); 2490 Diag(Loc, diag::err_ctor_init_missing_comma) 2491 << FixItHint::CreateInsertion(Loc, ", "); 2492 } else { 2493 // Skip over garbage, until we get to '{'. Don't eat the '{'. 2494 Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); 2495 SkipUntil(tok::l_brace, true, true); 2496 break; 2497 } 2498 } while (true); 2499 2500 Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, 2501 MemInitializers.data(), MemInitializers.size(), 2502 AnyErrors); 2503} 2504 2505/// ParseMemInitializer - Parse a C++ member initializer, which is 2506/// part of a constructor initializer that explicitly initializes one 2507/// member or base class (C++ [class.base.init]). See 2508/// ParseConstructorInitializer for an example. 2509/// 2510/// [C++] mem-initializer: 2511/// mem-initializer-id '(' expression-list[opt] ')' 2512/// [C++0x] mem-initializer-id braced-init-list 2513/// 2514/// [C++] mem-initializer-id: 2515/// '::'[opt] nested-name-specifier[opt] class-name 2516/// identifier 2517Parser::MemInitResult Parser::ParseMemInitializer(Decl *ConstructorDecl) { 2518 // parse '::'[opt] nested-name-specifier[opt] 2519 CXXScopeSpec SS; 2520 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 2521 ParsedType TemplateTypeTy; 2522 if (Tok.is(tok::annot_template_id)) { 2523 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 2524 if (TemplateId->Kind == TNK_Type_template || 2525 TemplateId->Kind == TNK_Dependent_template_name) { 2526 AnnotateTemplateIdTokenAsType(); 2527 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 2528 TemplateTypeTy = getTypeAnnotation(Tok); 2529 } 2530 } 2531 // Uses of decltype will already have been converted to annot_decltype by 2532 // ParseOptionalCXXScopeSpecifier at this point. 2533 if (!TemplateTypeTy && Tok.isNot(tok::identifier) 2534 && Tok.isNot(tok::annot_decltype)) { 2535 Diag(Tok, diag::err_expected_member_or_base_name); 2536 return true; 2537 } 2538 2539 IdentifierInfo *II = 0; 2540 DeclSpec DS(AttrFactory); 2541 SourceLocation IdLoc = Tok.getLocation(); 2542 if (Tok.is(tok::annot_decltype)) { 2543 // Get the decltype expression, if there is one. 2544 ParseDecltypeSpecifier(DS); 2545 } else { 2546 if (Tok.is(tok::identifier)) 2547 // Get the identifier. This may be a member name or a class name, 2548 // but we'll let the semantic analysis determine which it is. 2549 II = Tok.getIdentifierInfo(); 2550 ConsumeToken(); 2551 } 2552 2553 2554 // Parse the '('. 2555 if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) { 2556 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); 2557 2558 ExprResult InitList = ParseBraceInitializer(); 2559 if (InitList.isInvalid()) 2560 return true; 2561 2562 SourceLocation EllipsisLoc; 2563 if (Tok.is(tok::ellipsis)) 2564 EllipsisLoc = ConsumeToken(); 2565 2566 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2567 TemplateTypeTy, DS, IdLoc, 2568 InitList.take(), EllipsisLoc); 2569 } else if(Tok.is(tok::l_paren)) { 2570 BalancedDelimiterTracker T(*this, tok::l_paren); 2571 T.consumeOpen(); 2572 2573 // Parse the optional expression-list. 2574 ExprVector ArgExprs(Actions); 2575 CommaLocsTy CommaLocs; 2576 if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { 2577 SkipUntil(tok::r_paren); 2578 return true; 2579 } 2580 2581 T.consumeClose(); 2582 2583 SourceLocation EllipsisLoc; 2584 if (Tok.is(tok::ellipsis)) 2585 EllipsisLoc = ConsumeToken(); 2586 2587 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2588 TemplateTypeTy, DS, IdLoc, 2589 T.getOpenLocation(), ArgExprs.take(), 2590 ArgExprs.size(), T.getCloseLocation(), 2591 EllipsisLoc); 2592 } 2593 2594 Diag(Tok, getLangOpts().CPlusPlus0x ? diag::err_expected_lparen_or_lbrace 2595 : diag::err_expected_lparen); 2596 return true; 2597} 2598 2599/// \brief Parse a C++ exception-specification if present (C++0x [except.spec]). 2600/// 2601/// exception-specification: 2602/// dynamic-exception-specification 2603/// noexcept-specification 2604/// 2605/// noexcept-specification: 2606/// 'noexcept' 2607/// 'noexcept' '(' constant-expression ')' 2608ExceptionSpecificationType 2609Parser::tryParseExceptionSpecification( 2610 SourceRange &SpecificationRange, 2611 SmallVectorImpl<ParsedType> &DynamicExceptions, 2612 SmallVectorImpl<SourceRange> &DynamicExceptionRanges, 2613 ExprResult &NoexceptExpr) { 2614 ExceptionSpecificationType Result = EST_None; 2615 2616 // See if there's a dynamic specification. 2617 if (Tok.is(tok::kw_throw)) { 2618 Result = ParseDynamicExceptionSpecification(SpecificationRange, 2619 DynamicExceptions, 2620 DynamicExceptionRanges); 2621 assert(DynamicExceptions.size() == DynamicExceptionRanges.size() && 2622 "Produced different number of exception types and ranges."); 2623 } 2624 2625 // If there's no noexcept specification, we're done. 2626 if (Tok.isNot(tok::kw_noexcept)) 2627 return Result; 2628 2629 Diag(Tok, diag::warn_cxx98_compat_noexcept_decl); 2630 2631 // If we already had a dynamic specification, parse the noexcept for, 2632 // recovery, but emit a diagnostic and don't store the results. 2633 SourceRange NoexceptRange; 2634 ExceptionSpecificationType NoexceptType = EST_None; 2635 2636 SourceLocation KeywordLoc = ConsumeToken(); 2637 if (Tok.is(tok::l_paren)) { 2638 // There is an argument. 2639 BalancedDelimiterTracker T(*this, tok::l_paren); 2640 T.consumeOpen(); 2641 NoexceptType = EST_ComputedNoexcept; 2642 NoexceptExpr = ParseConstantExpression(); 2643 // The argument must be contextually convertible to bool. We use 2644 // ActOnBooleanCondition for this purpose. 2645 if (!NoexceptExpr.isInvalid()) 2646 NoexceptExpr = Actions.ActOnBooleanCondition(getCurScope(), KeywordLoc, 2647 NoexceptExpr.get()); 2648 T.consumeClose(); 2649 NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation()); 2650 } else { 2651 // There is no argument. 2652 NoexceptType = EST_BasicNoexcept; 2653 NoexceptRange = SourceRange(KeywordLoc, KeywordLoc); 2654 } 2655 2656 if (Result == EST_None) { 2657 SpecificationRange = NoexceptRange; 2658 Result = NoexceptType; 2659 2660 // If there's a dynamic specification after a noexcept specification, 2661 // parse that and ignore the results. 2662 if (Tok.is(tok::kw_throw)) { 2663 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2664 ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions, 2665 DynamicExceptionRanges); 2666 } 2667 } else { 2668 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2669 } 2670 2671 return Result; 2672} 2673 2674/// ParseDynamicExceptionSpecification - Parse a C++ 2675/// dynamic-exception-specification (C++ [except.spec]). 2676/// 2677/// dynamic-exception-specification: 2678/// 'throw' '(' type-id-list [opt] ')' 2679/// [MS] 'throw' '(' '...' ')' 2680/// 2681/// type-id-list: 2682/// type-id ... [opt] 2683/// type-id-list ',' type-id ... [opt] 2684/// 2685ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification( 2686 SourceRange &SpecificationRange, 2687 SmallVectorImpl<ParsedType> &Exceptions, 2688 SmallVectorImpl<SourceRange> &Ranges) { 2689 assert(Tok.is(tok::kw_throw) && "expected throw"); 2690 2691 SpecificationRange.setBegin(ConsumeToken()); 2692 BalancedDelimiterTracker T(*this, tok::l_paren); 2693 if (T.consumeOpen()) { 2694 Diag(Tok, diag::err_expected_lparen_after) << "throw"; 2695 SpecificationRange.setEnd(SpecificationRange.getBegin()); 2696 return EST_DynamicNone; 2697 } 2698 2699 // Parse throw(...), a Microsoft extension that means "this function 2700 // can throw anything". 2701 if (Tok.is(tok::ellipsis)) { 2702 SourceLocation EllipsisLoc = ConsumeToken(); 2703 if (!getLangOpts().MicrosoftExt) 2704 Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); 2705 T.consumeClose(); 2706 SpecificationRange.setEnd(T.getCloseLocation()); 2707 return EST_MSAny; 2708 } 2709 2710 // Parse the sequence of type-ids. 2711 SourceRange Range; 2712 while (Tok.isNot(tok::r_paren)) { 2713 TypeResult Res(ParseTypeName(&Range)); 2714 2715 if (Tok.is(tok::ellipsis)) { 2716 // C++0x [temp.variadic]p5: 2717 // - In a dynamic-exception-specification (15.4); the pattern is a 2718 // type-id. 2719 SourceLocation Ellipsis = ConsumeToken(); 2720 Range.setEnd(Ellipsis); 2721 if (!Res.isInvalid()) 2722 Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis); 2723 } 2724 2725 if (!Res.isInvalid()) { 2726 Exceptions.push_back(Res.get()); 2727 Ranges.push_back(Range); 2728 } 2729 2730 if (Tok.is(tok::comma)) 2731 ConsumeToken(); 2732 else 2733 break; 2734 } 2735 2736 T.consumeClose(); 2737 SpecificationRange.setEnd(T.getCloseLocation()); 2738 return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic; 2739} 2740 2741/// ParseTrailingReturnType - Parse a trailing return type on a new-style 2742/// function declaration. 2743TypeResult Parser::ParseTrailingReturnType(SourceRange &Range) { 2744 assert(Tok.is(tok::arrow) && "expected arrow"); 2745 2746 ConsumeToken(); 2747 2748 return ParseTypeName(&Range, Declarator::TrailingReturnContext); 2749} 2750 2751/// \brief We have just started parsing the definition of a new class, 2752/// so push that class onto our stack of classes that is currently 2753/// being parsed. 2754Sema::ParsingClassState 2755Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass) { 2756 assert((NonNestedClass || !ClassStack.empty()) && 2757 "Nested class without outer class"); 2758 ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass)); 2759 return Actions.PushParsingClass(); 2760} 2761 2762/// \brief Deallocate the given parsed class and all of its nested 2763/// classes. 2764void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { 2765 for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I) 2766 delete Class->LateParsedDeclarations[I]; 2767 delete Class; 2768} 2769 2770/// \brief Pop the top class of the stack of classes that are 2771/// currently being parsed. 2772/// 2773/// This routine should be called when we have finished parsing the 2774/// definition of a class, but have not yet popped the Scope 2775/// associated with the class's definition. 2776/// 2777/// \returns true if the class we've popped is a top-level class, 2778/// false otherwise. 2779void Parser::PopParsingClass(Sema::ParsingClassState state) { 2780 assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); 2781 2782 Actions.PopParsingClass(state); 2783 2784 ParsingClass *Victim = ClassStack.top(); 2785 ClassStack.pop(); 2786 if (Victim->TopLevelClass) { 2787 // Deallocate all of the nested classes of this class, 2788 // recursively: we don't need to keep any of this information. 2789 DeallocateParsedClasses(Victim); 2790 return; 2791 } 2792 assert(!ClassStack.empty() && "Missing top-level class?"); 2793 2794 if (Victim->LateParsedDeclarations.empty()) { 2795 // The victim is a nested class, but we will not need to perform 2796 // any processing after the definition of this class since it has 2797 // no members whose handling was delayed. Therefore, we can just 2798 // remove this nested class. 2799 DeallocateParsedClasses(Victim); 2800 return; 2801 } 2802 2803 // This nested class has some members that will need to be processed 2804 // after the top-level class is completely defined. Therefore, add 2805 // it to the list of nested classes within its parent. 2806 assert(getCurScope()->isClassScope() && "Nested class outside of class scope?"); 2807 ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim)); 2808 Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope(); 2809} 2810 2811/// \brief Try to parse an 'identifier' which appears within an attribute-token. 2812/// 2813/// \return the parsed identifier on success, and 0 if the next token is not an 2814/// attribute-token. 2815/// 2816/// C++11 [dcl.attr.grammar]p3: 2817/// If a keyword or an alternative token that satisfies the syntactic 2818/// requirements of an identifier is contained in an attribute-token, 2819/// it is considered an identifier. 2820IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) { 2821 switch (Tok.getKind()) { 2822 default: 2823 // Identifiers and keywords have identifier info attached. 2824 if (IdentifierInfo *II = Tok.getIdentifierInfo()) { 2825 Loc = ConsumeToken(); 2826 return II; 2827 } 2828 return 0; 2829 2830 case tok::ampamp: // 'and' 2831 case tok::pipe: // 'bitor' 2832 case tok::pipepipe: // 'or' 2833 case tok::caret: // 'xor' 2834 case tok::tilde: // 'compl' 2835 case tok::amp: // 'bitand' 2836 case tok::ampequal: // 'and_eq' 2837 case tok::pipeequal: // 'or_eq' 2838 case tok::caretequal: // 'xor_eq' 2839 case tok::exclaim: // 'not' 2840 case tok::exclaimequal: // 'not_eq' 2841 // Alternative tokens do not have identifier info, but their spelling 2842 // starts with an alphabetical character. 2843 llvm::SmallString<8> SpellingBuf; 2844 StringRef Spelling = PP.getSpelling(Tok.getLocation(), SpellingBuf); 2845 if (std::isalpha(Spelling[0])) { 2846 Loc = ConsumeToken(); 2847 return &PP.getIdentifierTable().get(Spelling); 2848 } 2849 return 0; 2850 } 2851} 2852 2853/// ParseCXX11AttributeSpecifier - Parse a C++11 attribute-specifier. Currently 2854/// only parses standard attributes. 2855/// 2856/// [C++11] attribute-specifier: 2857/// '[' '[' attribute-list ']' ']' 2858/// alignment-specifier 2859/// 2860/// [C++11] attribute-list: 2861/// attribute[opt] 2862/// attribute-list ',' attribute[opt] 2863/// attribute '...' 2864/// attribute-list ',' attribute '...' 2865/// 2866/// [C++11] attribute: 2867/// attribute-token attribute-argument-clause[opt] 2868/// 2869/// [C++11] attribute-token: 2870/// identifier 2871/// attribute-scoped-token 2872/// 2873/// [C++11] attribute-scoped-token: 2874/// attribute-namespace '::' identifier 2875/// 2876/// [C++11] attribute-namespace: 2877/// identifier 2878/// 2879/// [C++11] attribute-argument-clause: 2880/// '(' balanced-token-seq ')' 2881/// 2882/// [C++11] balanced-token-seq: 2883/// balanced-token 2884/// balanced-token-seq balanced-token 2885/// 2886/// [C++11] balanced-token: 2887/// '(' balanced-token-seq ')' 2888/// '[' balanced-token-seq ']' 2889/// '{' balanced-token-seq '}' 2890/// any token but '(', ')', '[', ']', '{', or '}' 2891void Parser::ParseCXX11AttributeSpecifier(ParsedAttributes &attrs, 2892 SourceLocation *endLoc) { 2893 if (Tok.is(tok::kw_alignas)) { 2894 Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas); 2895 ParseAlignmentSpecifier(attrs, endLoc); 2896 return; 2897 } 2898 2899 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) 2900 && "Not a C++11 attribute list"); 2901 2902 Diag(Tok.getLocation(), diag::warn_cxx98_compat_attribute); 2903 2904 ConsumeBracket(); 2905 ConsumeBracket(); 2906 2907 while (Tok.isNot(tok::r_square)) { 2908 // attribute not present 2909 if (Tok.is(tok::comma)) { 2910 ConsumeToken(); 2911 continue; 2912 } 2913 2914 SourceLocation ScopeLoc, AttrLoc; 2915 IdentifierInfo *ScopeName = 0, *AttrName = 0; 2916 2917 AttrName = TryParseCXX11AttributeIdentifier(AttrLoc); 2918 if (!AttrName) 2919 // Break out to the "expected ']'" diagnostic. 2920 break; 2921 2922 // scoped attribute 2923 if (Tok.is(tok::coloncolon)) { 2924 ConsumeToken(); 2925 2926 ScopeName = AttrName; 2927 ScopeLoc = AttrLoc; 2928 2929 AttrName = TryParseCXX11AttributeIdentifier(AttrLoc); 2930 if (!AttrName) { 2931 Diag(Tok.getLocation(), diag::err_expected_ident); 2932 SkipUntil(tok::r_square, tok::comma, true, true); 2933 continue; 2934 } 2935 } 2936 2937 bool AttrParsed = false; 2938 switch (AttributeList::getKind(AttrName, ScopeName, 2939 AttributeList::AS_CXX11)) { 2940 // No arguments 2941 case AttributeList::AT_CarriesDependency: 2942 // FIXME: implement generic support of attributes with C++11 syntax 2943 // see Parse/ParseDecl.cpp: ParseGNUAttributes 2944 case AttributeList::AT_FallThrough: 2945 case AttributeList::AT_NoReturn: { 2946 if (Tok.is(tok::l_paren)) { 2947 Diag(Tok.getLocation(), diag::err_cxx11_attribute_forbids_arguments) 2948 << AttrName->getName(); 2949 break; 2950 } 2951 2952 attrs.addNew(AttrName, 2953 SourceRange(ScopeLoc.isValid() ? ScopeLoc : AttrLoc, 2954 AttrLoc), 2955 ScopeName, ScopeLoc, 0, 2956 SourceLocation(), 0, 0, AttributeList::AS_CXX11); 2957 AttrParsed = true; 2958 break; 2959 } 2960 2961 // Silence warnings 2962 default: break; 2963 } 2964 2965 // Skip the entire parameter clause, if any 2966 if (!AttrParsed && Tok.is(tok::l_paren)) { 2967 ConsumeParen(); 2968 // SkipUntil maintains the balancedness of tokens. 2969 SkipUntil(tok::r_paren, false); 2970 } 2971 2972 if (Tok.is(tok::ellipsis)) { 2973 if (AttrParsed) 2974 Diag(Tok, diag::err_cxx11_attribute_forbids_ellipsis) 2975 << AttrName->getName(); 2976 ConsumeToken(); 2977 } 2978 } 2979 2980 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2981 SkipUntil(tok::r_square, false); 2982 if (endLoc) 2983 *endLoc = Tok.getLocation(); 2984 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2985 SkipUntil(tok::r_square, false); 2986} 2987 2988/// ParseCXX11Attributes - Parse a C++11 attribute-specifier-seq. 2989/// 2990/// attribute-specifier-seq: 2991/// attribute-specifier-seq[opt] attribute-specifier 2992void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs, 2993 SourceLocation *endLoc) { 2994 SourceLocation StartLoc = Tok.getLocation(), Loc; 2995 if (!endLoc) 2996 endLoc = &Loc; 2997 2998 do { 2999 ParseCXX11AttributeSpecifier(attrs, endLoc); 3000 } while (isCXX11AttributeSpecifier()); 3001 3002 attrs.Range = SourceRange(StartLoc, *endLoc); 3003} 3004 3005/// ParseMicrosoftAttributes - Parse a Microsoft attribute [Attr] 3006/// 3007/// [MS] ms-attribute: 3008/// '[' token-seq ']' 3009/// 3010/// [MS] ms-attribute-seq: 3011/// ms-attribute[opt] 3012/// ms-attribute ms-attribute-seq 3013void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs, 3014 SourceLocation *endLoc) { 3015 assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list"); 3016 3017 while (Tok.is(tok::l_square)) { 3018 // FIXME: If this is actually a C++11 attribute, parse it as one. 3019 ConsumeBracket(); 3020 SkipUntil(tok::r_square, true, true); 3021 if (endLoc) *endLoc = Tok.getLocation(); 3022 ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); 3023 } 3024} 3025 3026void Parser::ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType, 3027 AccessSpecifier& CurAS) { 3028 IfExistsCondition Result; 3029 if (ParseMicrosoftIfExistsCondition(Result)) 3030 return; 3031 3032 BalancedDelimiterTracker Braces(*this, tok::l_brace); 3033 if (Braces.consumeOpen()) { 3034 Diag(Tok, diag::err_expected_lbrace); 3035 return; 3036 } 3037 3038 switch (Result.Behavior) { 3039 case IEB_Parse: 3040 // Parse the declarations below. 3041 break; 3042 3043 case IEB_Dependent: 3044 Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists) 3045 << Result.IsIfExists; 3046 // Fall through to skip. 3047 3048 case IEB_Skip: 3049 Braces.skipToEnd(); 3050 return; 3051 } 3052 3053 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 3054 // __if_exists, __if_not_exists can nest. 3055 if ((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists))) { 3056 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 3057 continue; 3058 } 3059 3060 // Check for extraneous top-level semicolon. 3061 if (Tok.is(tok::semi)) { 3062 ConsumeExtraSemi(InsideStruct, TagType); 3063 continue; 3064 } 3065 3066 AccessSpecifier AS = getAccessSpecifierIfPresent(); 3067 if (AS != AS_none) { 3068 // Current token is a C++ access specifier. 3069 CurAS = AS; 3070 SourceLocation ASLoc = Tok.getLocation(); 3071 ConsumeToken(); 3072 if (Tok.is(tok::colon)) 3073 Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation()); 3074 else 3075 Diag(Tok, diag::err_expected_colon); 3076 ConsumeToken(); 3077 continue; 3078 } 3079 3080 // Parse all the comma separated declarators. 3081 ParseCXXClassMemberDeclaration(CurAS, 0); 3082 } 3083 3084 Braces.consumeClose(); 3085} 3086