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" 23 using 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 /// 51 Decl *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. 182 void 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 /// 222 Decl *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 /// 267 Decl *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'. 326 Decl *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 /// 374 Decl *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 /// 438 Decl *Parser::ParseUsingDeclaration(unsigned Context, 439 const ParsedTemplateInfo &TemplateInfo, 440 SourceLocation UsingLoc, 441 SourceLocation &DeclEnd, 442 AccessSpecifier AS, 443 Decl **OwnedType) { 444 CXXScopeSpec SS; 445 SourceLocation TypenameLoc; 446 bool IsTypeName; 447 448 // Ignore optional 'typename'. 449 // FIXME: This is wrong; we should parse this as a typename-specifier. 450 if (Tok.is(tok::kw_typename)) { 451 TypenameLoc = Tok.getLocation(); 452 ConsumeToken(); 453 IsTypeName = true; 454 } 455 else 456 IsTypeName = false; 457 458 // Parse nested-name-specifier. 459 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 460 461 // Check nested-name specifier. 462 if (SS.isInvalid()) { 463 SkipUntil(tok::semi); 464 return 0; 465 } 466 467 // Parse the unqualified-id. We allow parsing of both constructor and 468 // destructor names and allow the action module to diagnose any semantic 469 // errors. 470 SourceLocation TemplateKWLoc; 471 UnqualifiedId Name; 472 if (ParseUnqualifiedId(SS, 473 /*EnteringContext=*/false, 474 /*AllowDestructorName=*/true, 475 /*AllowConstructorName=*/true, 476 ParsedType(), 477 TemplateKWLoc, 478 Name)) { 479 SkipUntil(tok::semi); 480 return 0; 481 } 482 483 ParsedAttributes attrs(AttrFactory); 484 485 // Maybe this is an alias-declaration. 486 bool IsAliasDecl = Tok.is(tok::equal); 487 TypeResult TypeAlias; 488 if (IsAliasDecl) { 489 // TODO: Attribute support. C++0x attributes may appear before the equals. 490 // Where can GNU attributes appear? 491 ConsumeToken(); 492 493 Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ? 494 diag::warn_cxx98_compat_alias_declaration : 495 diag::ext_alias_declaration); 496 497 // Type alias templates cannot be specialized. 498 int SpecKind = -1; 499 if (TemplateInfo.Kind == ParsedTemplateInfo::Template && 500 Name.getKind() == UnqualifiedId::IK_TemplateId) 501 SpecKind = 0; 502 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization) 503 SpecKind = 1; 504 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 505 SpecKind = 2; 506 if (SpecKind != -1) { 507 SourceRange Range; 508 if (SpecKind == 0) 509 Range = SourceRange(Name.TemplateId->LAngleLoc, 510 Name.TemplateId->RAngleLoc); 511 else 512 Range = TemplateInfo.getSourceRange(); 513 Diag(Range.getBegin(), diag::err_alias_declaration_specialization) 514 << SpecKind << Range; 515 SkipUntil(tok::semi); 516 return 0; 517 } 518 519 // Name must be an identifier. 520 if (Name.getKind() != UnqualifiedId::IK_Identifier) { 521 Diag(Name.StartLocation, diag::err_alias_declaration_not_identifier); 522 // No removal fixit: can't recover from this. 523 SkipUntil(tok::semi); 524 return 0; 525 } else if (IsTypeName) 526 Diag(TypenameLoc, diag::err_alias_declaration_not_identifier) 527 << FixItHint::CreateRemoval(SourceRange(TypenameLoc, 528 SS.isNotEmpty() ? SS.getEndLoc() : TypenameLoc)); 529 else if (SS.isNotEmpty()) 530 Diag(SS.getBeginLoc(), diag::err_alias_declaration_not_identifier) 531 << FixItHint::CreateRemoval(SS.getRange()); 532 533 TypeAlias = ParseTypeName(0, TemplateInfo.Kind ? 534 Declarator::AliasTemplateContext : 535 Declarator::AliasDeclContext, AS, OwnedType); 536 } else 537 // Parse (optional) attributes (most likely GNU strong-using extension). 538 MaybeParseGNUAttributes(attrs); 539 540 // Eat ';'. 541 DeclEnd = Tok.getLocation(); 542 ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 543 !attrs.empty() ? "attributes list" : 544 IsAliasDecl ? "alias declaration" : "using declaration", 545 tok::semi); 546 547 // Diagnose an attempt to declare a templated using-declaration. 548 // In C++0x, alias-declarations can be templates: 549 // template <...> using id = type; 550 if (TemplateInfo.Kind && !IsAliasDecl) { 551 SourceRange R = TemplateInfo.getSourceRange(); 552 Diag(UsingLoc, diag::err_templated_using_declaration) 553 << R << FixItHint::CreateRemoval(R); 554 555 // Unfortunately, we have to bail out instead of recovering by 556 // ignoring the parameters, just in case the nested name specifier 557 // depends on the parameters. 558 return 0; 559 } 560 561 // "typename" keyword is allowed for identifiers only, 562 // because it may be a type definition. 563 if (IsTypeName && Name.getKind() != UnqualifiedId::IK_Identifier) { 564 Diag(Name.getSourceRange().getBegin(), diag::err_typename_identifiers_only) 565 << FixItHint::CreateRemoval(SourceRange(TypenameLoc)); 566 // Proceed parsing, but reset the IsTypeName flag. 567 IsTypeName = false; 568 } 569 570 if (IsAliasDecl) { 571 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 572 MultiTemplateParamsArg TemplateParamsArg(Actions, 573 TemplateParams ? TemplateParams->data() : 0, 574 TemplateParams ? TemplateParams->size() : 0); 575 return Actions.ActOnAliasDeclaration(getCurScope(), AS, TemplateParamsArg, 576 UsingLoc, Name, TypeAlias); 577 } 578 579 return Actions.ActOnUsingDeclaration(getCurScope(), AS, true, UsingLoc, SS, 580 Name, attrs.getList(), 581 IsTypeName, TypenameLoc); 582 } 583 584 /// ParseStaticAssertDeclaration - Parse C++0x or C11 static_assert-declaration. 585 /// 586 /// [C++0x] static_assert-declaration: 587 /// static_assert ( constant-expression , string-literal ) ; 588 /// 589 /// [C11] static_assert-declaration: 590 /// _Static_assert ( constant-expression , string-literal ) ; 591 /// 592 Decl *Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){ 593 assert((Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) && 594 "Not a static_assert declaration"); 595 596 if (Tok.is(tok::kw__Static_assert) && !getLangOpts().C11) 597 Diag(Tok, diag::ext_c11_static_assert); 598 if (Tok.is(tok::kw_static_assert)) 599 Diag(Tok, diag::warn_cxx98_compat_static_assert); 600 601 SourceLocation StaticAssertLoc = ConsumeToken(); 602 603 BalancedDelimiterTracker T(*this, tok::l_paren); 604 if (T.consumeOpen()) { 605 Diag(Tok, diag::err_expected_lparen); 606 return 0; 607 } 608 609 ExprResult AssertExpr(ParseConstantExpression()); 610 if (AssertExpr.isInvalid()) { 611 SkipUntil(tok::semi); 612 return 0; 613 } 614 615 if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi)) 616 return 0; 617 618 if (!isTokenStringLiteral()) { 619 Diag(Tok, diag::err_expected_string_literal); 620 SkipUntil(tok::semi); 621 return 0; 622 } 623 624 ExprResult AssertMessage(ParseStringLiteralExpression()); 625 if (AssertMessage.isInvalid()) { 626 SkipUntil(tok::semi); 627 return 0; 628 } 629 630 T.consumeClose(); 631 632 DeclEnd = Tok.getLocation(); 633 ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert); 634 635 return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, 636 AssertExpr.take(), 637 AssertMessage.take(), 638 T.getCloseLocation()); 639 } 640 641 /// ParseDecltypeSpecifier - Parse a C++0x decltype specifier. 642 /// 643 /// 'decltype' ( expression ) 644 /// 645 SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) { 646 assert((Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) 647 && "Not a decltype specifier"); 648 649 650 ExprResult Result; 651 SourceLocation StartLoc = Tok.getLocation(); 652 SourceLocation EndLoc; 653 654 if (Tok.is(tok::annot_decltype)) { 655 Result = getExprAnnotation(Tok); 656 EndLoc = Tok.getAnnotationEndLoc(); 657 ConsumeToken(); 658 if (Result.isInvalid()) { 659 DS.SetTypeSpecError(); 660 return EndLoc; 661 } 662 } else { 663 if (Tok.getIdentifierInfo()->isStr("decltype")) 664 Diag(Tok, diag::warn_cxx98_compat_decltype); 665 666 ConsumeToken(); 667 668 BalancedDelimiterTracker T(*this, tok::l_paren); 669 if (T.expectAndConsume(diag::err_expected_lparen_after, 670 "decltype", tok::r_paren)) { 671 DS.SetTypeSpecError(); 672 return T.getOpenLocation() == Tok.getLocation() ? 673 StartLoc : T.getOpenLocation(); 674 } 675 676 // Parse the expression 677 678 // C++0x [dcl.type.simple]p4: 679 // The operand of the decltype specifier is an unevaluated operand. 680 EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated, 681 0, /*IsDecltype=*/true); 682 Result = ParseExpression(); 683 if (Result.isInvalid()) { 684 SkipUntil(tok::r_paren); 685 DS.SetTypeSpecError(); 686 return StartLoc; 687 } 688 689 // Match the ')' 690 T.consumeClose(); 691 if (T.getCloseLocation().isInvalid()) { 692 DS.SetTypeSpecError(); 693 // FIXME: this should return the location of the last token 694 // that was consumed (by "consumeClose()") 695 return T.getCloseLocation(); 696 } 697 698 Result = Actions.ActOnDecltypeExpression(Result.take()); 699 if (Result.isInvalid()) { 700 DS.SetTypeSpecError(); 701 return T.getCloseLocation(); 702 } 703 704 EndLoc = T.getCloseLocation(); 705 } 706 707 const char *PrevSpec = 0; 708 unsigned DiagID; 709 // Check for duplicate type specifiers (e.g. "int decltype(a)"). 710 if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec, 711 DiagID, Result.release())) { 712 Diag(StartLoc, DiagID) << PrevSpec; 713 DS.SetTypeSpecError(); 714 } 715 return EndLoc; 716 } 717 718 void Parser::AnnotateExistingDecltypeSpecifier(const DeclSpec& DS, 719 SourceLocation StartLoc, 720 SourceLocation EndLoc) { 721 // make sure we have a token we can turn into an annotation token 722 if (PP.isBacktrackEnabled()) 723 PP.RevertCachedTokens(1); 724 else 725 PP.EnterToken(Tok); 726 727 Tok.setKind(tok::annot_decltype); 728 setExprAnnotation(Tok, DS.getTypeSpecType() == TST_decltype ? 729 DS.getRepAsExpr() : ExprResult()); 730 Tok.setAnnotationEndLoc(EndLoc); 731 Tok.setLocation(StartLoc); 732 PP.AnnotateCachedTokens(Tok); 733 } 734 735 void Parser::ParseUnderlyingTypeSpecifier(DeclSpec &DS) { 736 assert(Tok.is(tok::kw___underlying_type) && 737 "Not an underlying type specifier"); 738 739 SourceLocation StartLoc = ConsumeToken(); 740 BalancedDelimiterTracker T(*this, tok::l_paren); 741 if (T.expectAndConsume(diag::err_expected_lparen_after, 742 "__underlying_type", tok::r_paren)) { 743 return; 744 } 745 746 TypeResult Result = ParseTypeName(); 747 if (Result.isInvalid()) { 748 SkipUntil(tok::r_paren); 749 return; 750 } 751 752 // Match the ')' 753 T.consumeClose(); 754 if (T.getCloseLocation().isInvalid()) 755 return; 756 757 const char *PrevSpec = 0; 758 unsigned DiagID; 759 if (DS.SetTypeSpecType(DeclSpec::TST_underlyingType, StartLoc, PrevSpec, 760 DiagID, Result.release())) 761 Diag(StartLoc, DiagID) << PrevSpec; 762 } 763 764 /// ParseBaseTypeSpecifier - Parse a C++ base-type-specifier which is either a 765 /// class name or decltype-specifier. Note that we only check that the result 766 /// names a type; semantic analysis will need to verify that the type names a 767 /// class. The result is either a type or null, depending on whether a type 768 /// name was found. 769 /// 770 /// base-type-specifier: [C++ 10.1] 771 /// class-or-decltype 772 /// class-or-decltype: [C++ 10.1] 773 /// nested-name-specifier[opt] class-name 774 /// decltype-specifier 775 /// class-name: [C++ 9.1] 776 /// identifier 777 /// simple-template-id 778 /// 779 Parser::TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc, 780 SourceLocation &EndLocation) { 781 // Ignore attempts to use typename 782 if (Tok.is(tok::kw_typename)) { 783 Diag(Tok, diag::err_expected_class_name_not_template) 784 << FixItHint::CreateRemoval(Tok.getLocation()); 785 ConsumeToken(); 786 } 787 788 // Parse optional nested-name-specifier 789 CXXScopeSpec SS; 790 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 791 792 BaseLoc = Tok.getLocation(); 793 794 // Parse decltype-specifier 795 // tok == kw_decltype is just error recovery, it can only happen when SS 796 // isn't empty 797 if (Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) { 798 if (SS.isNotEmpty()) 799 Diag(SS.getBeginLoc(), diag::err_unexpected_scope_on_base_decltype) 800 << FixItHint::CreateRemoval(SS.getRange()); 801 // Fake up a Declarator to use with ActOnTypeName. 802 DeclSpec DS(AttrFactory); 803 804 EndLocation = ParseDecltypeSpecifier(DS); 805 806 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 807 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 808 } 809 810 // Check whether we have a template-id that names a type. 811 if (Tok.is(tok::annot_template_id)) { 812 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 813 if (TemplateId->Kind == TNK_Type_template || 814 TemplateId->Kind == TNK_Dependent_template_name) { 815 AnnotateTemplateIdTokenAsType(); 816 817 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 818 ParsedType Type = getTypeAnnotation(Tok); 819 EndLocation = Tok.getAnnotationEndLoc(); 820 ConsumeToken(); 821 822 if (Type) 823 return Type; 824 return true; 825 } 826 827 // Fall through to produce an error below. 828 } 829 830 if (Tok.isNot(tok::identifier)) { 831 Diag(Tok, diag::err_expected_class_name); 832 return true; 833 } 834 835 IdentifierInfo *Id = Tok.getIdentifierInfo(); 836 SourceLocation IdLoc = ConsumeToken(); 837 838 if (Tok.is(tok::less)) { 839 // It looks the user intended to write a template-id here, but the 840 // template-name was wrong. Try to fix that. 841 TemplateNameKind TNK = TNK_Type_template; 842 TemplateTy Template; 843 if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, getCurScope(), 844 &SS, Template, TNK)) { 845 Diag(IdLoc, diag::err_unknown_template_name) 846 << Id; 847 } 848 849 if (!Template) 850 return true; 851 852 // Form the template name 853 UnqualifiedId TemplateName; 854 TemplateName.setIdentifier(Id, IdLoc); 855 856 // Parse the full template-id, then turn it into a type. 857 if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(), 858 TemplateName, true)) 859 return true; 860 if (TNK == TNK_Dependent_template_name) 861 AnnotateTemplateIdTokenAsType(); 862 863 // If we didn't end up with a typename token, there's nothing more we 864 // can do. 865 if (Tok.isNot(tok::annot_typename)) 866 return true; 867 868 // Retrieve the type from the annotation token, consume that token, and 869 // return. 870 EndLocation = Tok.getAnnotationEndLoc(); 871 ParsedType Type = getTypeAnnotation(Tok); 872 ConsumeToken(); 873 return Type; 874 } 875 876 // We have an identifier; check whether it is actually a type. 877 ParsedType Type = Actions.getTypeName(*Id, IdLoc, getCurScope(), &SS, true, 878 false, ParsedType(), 879 /*IsCtorOrDtorName=*/false, 880 /*NonTrivialTypeSourceInfo=*/true); 881 if (!Type) { 882 Diag(IdLoc, diag::err_expected_class_name); 883 return true; 884 } 885 886 // Consume the identifier. 887 EndLocation = IdLoc; 888 889 // Fake up a Declarator to use with ActOnTypeName. 890 DeclSpec DS(AttrFactory); 891 DS.SetRangeStart(IdLoc); 892 DS.SetRangeEnd(EndLocation); 893 DS.getTypeSpecScope() = SS; 894 895 const char *PrevSpec = 0; 896 unsigned DiagID; 897 DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type); 898 899 Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); 900 return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); 901 } 902 903 /// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or 904 /// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which 905 /// until we reach the start of a definition or see a token that 906 /// cannot start a definition. 907 /// 908 /// class-specifier: [C++ class] 909 /// class-head '{' member-specification[opt] '}' 910 /// class-head '{' member-specification[opt] '}' attributes[opt] 911 /// class-head: 912 /// class-key identifier[opt] base-clause[opt] 913 /// class-key nested-name-specifier identifier base-clause[opt] 914 /// class-key nested-name-specifier[opt] simple-template-id 915 /// base-clause[opt] 916 /// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] 917 /// [GNU] class-key attributes[opt] nested-name-specifier 918 /// identifier base-clause[opt] 919 /// [GNU] class-key attributes[opt] nested-name-specifier[opt] 920 /// simple-template-id base-clause[opt] 921 /// class-key: 922 /// 'class' 923 /// 'struct' 924 /// 'union' 925 /// 926 /// elaborated-type-specifier: [C++ dcl.type.elab] 927 /// class-key ::[opt] nested-name-specifier[opt] identifier 928 /// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] 929 /// simple-template-id 930 /// 931 /// Note that the C++ class-specifier and elaborated-type-specifier, 932 /// together, subsume the C99 struct-or-union-specifier: 933 /// 934 /// struct-or-union-specifier: [C99 6.7.2.1] 935 /// struct-or-union identifier[opt] '{' struct-contents '}' 936 /// struct-or-union identifier 937 /// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents 938 /// '}' attributes[opt] 939 /// [GNU] struct-or-union attributes[opt] identifier 940 /// struct-or-union: 941 /// 'struct' 942 /// 'union' 943 void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, 944 SourceLocation StartLoc, DeclSpec &DS, 945 const ParsedTemplateInfo &TemplateInfo, 946 AccessSpecifier AS, 947 bool EnteringContext, DeclSpecContext DSC) { 948 DeclSpec::TST TagType; 949 if (TagTokKind == tok::kw_struct) 950 TagType = DeclSpec::TST_struct; 951 else if (TagTokKind == tok::kw_class) 952 TagType = DeclSpec::TST_class; 953 else { 954 assert(TagTokKind == tok::kw_union && "Not a class specifier"); 955 TagType = DeclSpec::TST_union; 956 } 957 958 if (Tok.is(tok::code_completion)) { 959 // Code completion for a struct, class, or union name. 960 Actions.CodeCompleteTag(getCurScope(), TagType); 961 return cutOffParsing(); 962 } 963 964 // C++03 [temp.explicit] 14.7.2/8: 965 // The usual access checking rules do not apply to names used to specify 966 // explicit instantiations. 967 // 968 // As an extension we do not perform access checking on the names used to 969 // specify explicit specializations either. This is important to allow 970 // specializing traits classes for private types. 971 Sema::SuppressAccessChecksRAII SuppressAccess(Actions, 972 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation || 973 TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization); 974 975 ParsedAttributes attrs(AttrFactory); 976 // If attributes exist after tag, parse them. 977 if (Tok.is(tok::kw___attribute)) 978 ParseGNUAttributes(attrs); 979 980 // If declspecs exist after tag, parse them. 981 while (Tok.is(tok::kw___declspec)) 982 ParseMicrosoftDeclSpec(attrs); 983 984 // If C++0x attributes exist here, parse them. 985 // FIXME: Are we consistent with the ordering of parsing of different 986 // styles of attributes? 987 MaybeParseCXX0XAttributes(attrs); 988 989 if (TagType == DeclSpec::TST_struct && 990 !Tok.is(tok::identifier) && 991 Tok.getIdentifierInfo() && 992 (Tok.is(tok::kw___is_arithmetic) || 993 Tok.is(tok::kw___is_convertible) || 994 Tok.is(tok::kw___is_empty) || 995 Tok.is(tok::kw___is_floating_point) || 996 Tok.is(tok::kw___is_function) || 997 Tok.is(tok::kw___is_fundamental) || 998 Tok.is(tok::kw___is_integral) || 999 Tok.is(tok::kw___is_member_function_pointer) || 1000 Tok.is(tok::kw___is_member_pointer) || 1001 Tok.is(tok::kw___is_pod) || 1002 Tok.is(tok::kw___is_pointer) || 1003 Tok.is(tok::kw___is_same) || 1004 Tok.is(tok::kw___is_scalar) || 1005 Tok.is(tok::kw___is_signed) || 1006 Tok.is(tok::kw___is_unsigned) || 1007 Tok.is(tok::kw___is_void))) { 1008 // GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the 1009 // name of struct templates, but some are keywords in GCC >= 4.3 1010 // and Clang. Therefore, when we see the token sequence "struct 1011 // X", make X into a normal identifier rather than a keyword, to 1012 // allow libstdc++ 4.2 and libc++ to work properly. 1013 Tok.getIdentifierInfo()->RevertTokenIDToIdentifier(); 1014 Tok.setKind(tok::identifier); 1015 } 1016 1017 // Parse the (optional) nested-name-specifier. 1018 CXXScopeSpec &SS = DS.getTypeSpecScope(); 1019 if (getLangOpts().CPlusPlus) { 1020 // "FOO : BAR" is not a potential typo for "FOO::BAR". 1021 ColonProtectionRAIIObject X(*this); 1022 1023 if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext)) 1024 DS.SetTypeSpecError(); 1025 if (SS.isSet()) 1026 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) 1027 Diag(Tok, diag::err_expected_ident); 1028 } 1029 1030 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 1031 1032 // Parse the (optional) class name or simple-template-id. 1033 IdentifierInfo *Name = 0; 1034 SourceLocation NameLoc; 1035 TemplateIdAnnotation *TemplateId = 0; 1036 if (Tok.is(tok::identifier)) { 1037 Name = Tok.getIdentifierInfo(); 1038 NameLoc = ConsumeToken(); 1039 1040 if (Tok.is(tok::less) && getLangOpts().CPlusPlus) { 1041 // The name was supposed to refer to a template, but didn't. 1042 // Eat the template argument list and try to continue parsing this as 1043 // a class (or template thereof). 1044 TemplateArgList TemplateArgs; 1045 SourceLocation LAngleLoc, RAngleLoc; 1046 if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, SS, 1047 true, LAngleLoc, 1048 TemplateArgs, RAngleLoc)) { 1049 // We couldn't parse the template argument list at all, so don't 1050 // try to give any location information for the list. 1051 LAngleLoc = RAngleLoc = SourceLocation(); 1052 } 1053 1054 Diag(NameLoc, diag::err_explicit_spec_non_template) 1055 << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) 1056 << (TagType == DeclSpec::TST_class? 0 1057 : TagType == DeclSpec::TST_struct? 1 1058 : 2) 1059 << Name 1060 << SourceRange(LAngleLoc, RAngleLoc); 1061 1062 // Strip off the last template parameter list if it was empty, since 1063 // we've removed its template argument list. 1064 if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) { 1065 if (TemplateParams && TemplateParams->size() > 1) { 1066 TemplateParams->pop_back(); 1067 } else { 1068 TemplateParams = 0; 1069 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1070 = ParsedTemplateInfo::NonTemplate; 1071 } 1072 } else if (TemplateInfo.Kind 1073 == ParsedTemplateInfo::ExplicitInstantiation) { 1074 // Pretend this is just a forward declaration. 1075 TemplateParams = 0; 1076 const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind 1077 = ParsedTemplateInfo::NonTemplate; 1078 const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc 1079 = SourceLocation(); 1080 const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc 1081 = SourceLocation(); 1082 } 1083 } 1084 } else if (Tok.is(tok::annot_template_id)) { 1085 TemplateId = takeTemplateIdAnnotation(Tok); 1086 NameLoc = ConsumeToken(); 1087 1088 if (TemplateId->Kind != TNK_Type_template && 1089 TemplateId->Kind != TNK_Dependent_template_name) { 1090 // The template-name in the simple-template-id refers to 1091 // something other than a class template. Give an appropriate 1092 // error message and skip to the ';'. 1093 SourceRange Range(NameLoc); 1094 if (SS.isNotEmpty()) 1095 Range.setBegin(SS.getBeginLoc()); 1096 1097 Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) 1098 << Name << static_cast<int>(TemplateId->Kind) << Range; 1099 1100 DS.SetTypeSpecError(); 1101 SkipUntil(tok::semi, false, true); 1102 return; 1103 } 1104 } 1105 1106 // As soon as we're finished parsing the class's template-id, turn access 1107 // checking back on. 1108 SuppressAccess.done(); 1109 1110 // There are four options here. 1111 // - If we are in a trailing return type, this is always just a reference, 1112 // and we must not try to parse a definition. For instance, 1113 // [] () -> struct S { }; 1114 // does not define a type. 1115 // - If we have 'struct foo {...', 'struct foo :...', 1116 // 'struct foo final :' or 'struct foo final {', then this is a definition. 1117 // - If we have 'struct foo;', then this is either a forward declaration 1118 // or a friend declaration, which have to be treated differently. 1119 // - Otherwise we have something like 'struct foo xyz', a reference. 1120 // However, in type-specifier-seq's, things look like declarations but are 1121 // just references, e.g. 1122 // new struct s; 1123 // or 1124 // &T::operator struct s; 1125 // For these, DSC is DSC_type_specifier. 1126 Sema::TagUseKind TUK; 1127 if (DSC == DSC_trailing) 1128 TUK = Sema::TUK_Reference; 1129 else if (Tok.is(tok::l_brace) || 1130 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1131 (isCXX0XFinalKeyword() && 1132 (NextToken().is(tok::l_brace) || NextToken().is(tok::colon)))) { 1133 if (DS.isFriendSpecified()) { 1134 // C++ [class.friend]p2: 1135 // A class shall not be defined in a friend declaration. 1136 Diag(Tok.getLocation(), diag::err_friend_decl_defines_type) 1137 << SourceRange(DS.getFriendSpecLoc()); 1138 1139 // Skip everything up to the semicolon, so that this looks like a proper 1140 // friend class (or template thereof) declaration. 1141 SkipUntil(tok::semi, true, true); 1142 TUK = Sema::TUK_Friend; 1143 } else { 1144 // Okay, this is a class definition. 1145 TUK = Sema::TUK_Definition; 1146 } 1147 } else if (Tok.is(tok::semi) && DSC != DSC_type_specifier) 1148 TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration; 1149 else 1150 TUK = Sema::TUK_Reference; 1151 1152 if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error || 1153 TUK != Sema::TUK_Definition)) { 1154 if (DS.getTypeSpecType() != DeclSpec::TST_error) { 1155 // We have a declaration or reference to an anonymous class. 1156 Diag(StartLoc, diag::err_anon_type_definition) 1157 << DeclSpec::getSpecifierName(TagType); 1158 } 1159 1160 SkipUntil(tok::comma, true); 1161 return; 1162 } 1163 1164 // Create the tag portion of the class or class template. 1165 DeclResult TagOrTempResult = true; // invalid 1166 TypeResult TypeResult = true; // invalid 1167 1168 bool Owned = false; 1169 if (TemplateId) { 1170 // Explicit specialization, class template partial specialization, 1171 // or explicit instantiation. 1172 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 1173 TemplateId->getTemplateArgs(), 1174 TemplateId->NumArgs); 1175 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1176 TUK == Sema::TUK_Declaration) { 1177 // This is an explicit instantiation of a class template. 1178 TagOrTempResult 1179 = Actions.ActOnExplicitInstantiation(getCurScope(), 1180 TemplateInfo.ExternLoc, 1181 TemplateInfo.TemplateLoc, 1182 TagType, 1183 StartLoc, 1184 SS, 1185 TemplateId->Template, 1186 TemplateId->TemplateNameLoc, 1187 TemplateId->LAngleLoc, 1188 TemplateArgsPtr, 1189 TemplateId->RAngleLoc, 1190 attrs.getList()); 1191 1192 // Friend template-ids are treated as references unless 1193 // they have template headers, in which case they're ill-formed 1194 // (FIXME: "template <class T> friend class A<T>::B<int>;"). 1195 // We diagnose this error in ActOnClassTemplateSpecialization. 1196 } else if (TUK == Sema::TUK_Reference || 1197 (TUK == Sema::TUK_Friend && 1198 TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) { 1199 TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc, 1200 TemplateId->SS, 1201 TemplateId->TemplateKWLoc, 1202 TemplateId->Template, 1203 TemplateId->TemplateNameLoc, 1204 TemplateId->LAngleLoc, 1205 TemplateArgsPtr, 1206 TemplateId->RAngleLoc); 1207 } else { 1208 // This is an explicit specialization or a class template 1209 // partial specialization. 1210 TemplateParameterLists FakedParamLists; 1211 1212 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 1213 // This looks like an explicit instantiation, because we have 1214 // something like 1215 // 1216 // template class Foo<X> 1217 // 1218 // but it actually has a definition. Most likely, this was 1219 // meant to be an explicit specialization, but the user forgot 1220 // the '<>' after 'template'. 1221 assert(TUK == Sema::TUK_Definition && "Expected a definition here"); 1222 1223 SourceLocation LAngleLoc 1224 = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 1225 Diag(TemplateId->TemplateNameLoc, 1226 diag::err_explicit_instantiation_with_definition) 1227 << SourceRange(TemplateInfo.TemplateLoc) 1228 << FixItHint::CreateInsertion(LAngleLoc, "<>"); 1229 1230 // Create a fake template parameter list that contains only 1231 // "template<>", so that we treat this construct as a class 1232 // template specialization. 1233 FakedParamLists.push_back( 1234 Actions.ActOnTemplateParameterList(0, SourceLocation(), 1235 TemplateInfo.TemplateLoc, 1236 LAngleLoc, 1237 0, 0, 1238 LAngleLoc)); 1239 TemplateParams = &FakedParamLists; 1240 } 1241 1242 // Build the class template specialization. 1243 TagOrTempResult 1244 = Actions.ActOnClassTemplateSpecialization(getCurScope(), TagType, TUK, 1245 StartLoc, DS.getModulePrivateSpecLoc(), SS, 1246 TemplateId->Template, 1247 TemplateId->TemplateNameLoc, 1248 TemplateId->LAngleLoc, 1249 TemplateArgsPtr, 1250 TemplateId->RAngleLoc, 1251 attrs.getList(), 1252 MultiTemplateParamsArg(Actions, 1253 TemplateParams? &(*TemplateParams)[0] : 0, 1254 TemplateParams? TemplateParams->size() : 0)); 1255 } 1256 } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1257 TUK == Sema::TUK_Declaration) { 1258 // Explicit instantiation of a member of a class template 1259 // specialization, e.g., 1260 // 1261 // template struct Outer<int>::Inner; 1262 // 1263 TagOrTempResult 1264 = Actions.ActOnExplicitInstantiation(getCurScope(), 1265 TemplateInfo.ExternLoc, 1266 TemplateInfo.TemplateLoc, 1267 TagType, StartLoc, SS, Name, 1268 NameLoc, attrs.getList()); 1269 } else if (TUK == Sema::TUK_Friend && 1270 TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { 1271 TagOrTempResult = 1272 Actions.ActOnTemplatedFriendTag(getCurScope(), DS.getFriendSpecLoc(), 1273 TagType, StartLoc, SS, 1274 Name, NameLoc, attrs.getList(), 1275 MultiTemplateParamsArg(Actions, 1276 TemplateParams? &(*TemplateParams)[0] : 0, 1277 TemplateParams? TemplateParams->size() : 0)); 1278 } else { 1279 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 1280 TUK == Sema::TUK_Definition) { 1281 // FIXME: Diagnose this particular error. 1282 } 1283 1284 bool IsDependent = false; 1285 1286 // Don't pass down template parameter lists if this is just a tag 1287 // reference. For example, we don't need the template parameters here: 1288 // template <class T> class A *makeA(T t); 1289 MultiTemplateParamsArg TParams; 1290 if (TUK != Sema::TUK_Reference && TemplateParams) 1291 TParams = 1292 MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size()); 1293 1294 // Declaration or definition of a class type 1295 TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc, 1296 SS, Name, NameLoc, attrs.getList(), AS, 1297 DS.getModulePrivateSpecLoc(), 1298 TParams, Owned, IsDependent, 1299 SourceLocation(), false, 1300 clang::TypeResult()); 1301 1302 // If ActOnTag said the type was dependent, try again with the 1303 // less common call. 1304 if (IsDependent) { 1305 assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend); 1306 TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK, 1307 SS, Name, StartLoc, NameLoc); 1308 } 1309 } 1310 1311 // If there is a body, parse it and inform the actions module. 1312 if (TUK == Sema::TUK_Definition) { 1313 assert(Tok.is(tok::l_brace) || 1314 (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || 1315 isCXX0XFinalKeyword()); 1316 if (getLangOpts().CPlusPlus) 1317 ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); 1318 else 1319 ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); 1320 } 1321 1322 const char *PrevSpec = 0; 1323 unsigned DiagID; 1324 bool Result; 1325 if (!TypeResult.isInvalid()) { 1326 Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, 1327 NameLoc.isValid() ? NameLoc : StartLoc, 1328 PrevSpec, DiagID, TypeResult.get()); 1329 } else if (!TagOrTempResult.isInvalid()) { 1330 Result = DS.SetTypeSpecType(TagType, StartLoc, 1331 NameLoc.isValid() ? NameLoc : StartLoc, 1332 PrevSpec, DiagID, TagOrTempResult.get(), Owned); 1333 } else { 1334 DS.SetTypeSpecError(); 1335 return; 1336 } 1337 1338 if (Result) 1339 Diag(StartLoc, DiagID) << PrevSpec; 1340 1341 // At this point, we've successfully parsed a class-specifier in 'definition' 1342 // form (e.g. "struct foo { int x; }". While we could just return here, we're 1343 // going to look at what comes after it to improve error recovery. If an 1344 // impossible token occurs next, we assume that the programmer forgot a ; at 1345 // the end of the declaration and recover that way. 1346 // 1347 // This switch enumerates the valid "follow" set for definition. 1348 if (TUK == Sema::TUK_Definition) { 1349 bool ExpectedSemi = true; 1350 switch (Tok.getKind()) { 1351 default: break; 1352 case tok::semi: // struct foo {...} ; 1353 case tok::star: // struct foo {...} * P; 1354 case tok::amp: // struct foo {...} & R = ... 1355 case tok::identifier: // struct foo {...} V ; 1356 case tok::r_paren: //(struct foo {...} ) {4} 1357 case tok::annot_cxxscope: // struct foo {...} a:: b; 1358 case tok::annot_typename: // struct foo {...} a ::b; 1359 case tok::annot_template_id: // struct foo {...} a<int> ::b; 1360 case tok::l_paren: // struct foo {...} ( x); 1361 case tok::comma: // __builtin_offsetof(struct foo{...} , 1362 ExpectedSemi = false; 1363 break; 1364 // Type qualifiers 1365 case tok::kw_const: // struct foo {...} const x; 1366 case tok::kw_volatile: // struct foo {...} volatile x; 1367 case tok::kw_restrict: // struct foo {...} restrict x; 1368 case tok::kw_inline: // struct foo {...} inline foo() {}; 1369 // Storage-class specifiers 1370 case tok::kw_static: // struct foo {...} static x; 1371 case tok::kw_extern: // struct foo {...} extern x; 1372 case tok::kw_typedef: // struct foo {...} typedef x; 1373 case tok::kw_register: // struct foo {...} register x; 1374 case tok::kw_auto: // struct foo {...} auto x; 1375 case tok::kw_mutable: // struct foo {...} mutable x; 1376 case tok::kw_constexpr: // struct foo {...} constexpr x; 1377 // As shown above, type qualifiers and storage class specifiers absolutely 1378 // can occur after class specifiers according to the grammar. However, 1379 // almost no one actually writes code like this. If we see one of these, 1380 // it is much more likely that someone missed a semi colon and the 1381 // type/storage class specifier we're seeing is part of the *next* 1382 // intended declaration, as in: 1383 // 1384 // struct foo { ... } 1385 // typedef int X; 1386 // 1387 // We'd really like to emit a missing semicolon error instead of emitting 1388 // an error on the 'int' saying that you can't have two type specifiers in 1389 // the same declaration of X. Because of this, we look ahead past this 1390 // token to see if it's a type specifier. If so, we know the code is 1391 // otherwise invalid, so we can produce the expected semi error. 1392 if (!isKnownToBeTypeSpecifier(NextToken())) 1393 ExpectedSemi = false; 1394 break; 1395 1396 case tok::r_brace: // struct bar { struct foo {...} } 1397 // Missing ';' at end of struct is accepted as an extension in C mode. 1398 if (!getLangOpts().CPlusPlus) 1399 ExpectedSemi = false; 1400 break; 1401 } 1402 1403 // C++ [temp]p3 In a template-declaration which defines a class, no 1404 // declarator is permitted. 1405 if (TemplateInfo.Kind) 1406 ExpectedSemi = true; 1407 1408 if (ExpectedSemi) { 1409 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl, 1410 TagType == DeclSpec::TST_class ? "class" 1411 : TagType == DeclSpec::TST_struct? "struct" : "union"); 1412 // Push this token back into the preprocessor and change our current token 1413 // to ';' so that the rest of the code recovers as though there were an 1414 // ';' after the definition. 1415 PP.EnterToken(Tok); 1416 Tok.setKind(tok::semi); 1417 } 1418 } 1419 } 1420 1421 /// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. 1422 /// 1423 /// base-clause : [C++ class.derived] 1424 /// ':' base-specifier-list 1425 /// base-specifier-list: 1426 /// base-specifier '...'[opt] 1427 /// base-specifier-list ',' base-specifier '...'[opt] 1428 void Parser::ParseBaseClause(Decl *ClassDecl) { 1429 assert(Tok.is(tok::colon) && "Not a base clause"); 1430 ConsumeToken(); 1431 1432 // Build up an array of parsed base specifiers. 1433 SmallVector<CXXBaseSpecifier *, 8> BaseInfo; 1434 1435 while (true) { 1436 // Parse a base-specifier. 1437 BaseResult Result = ParseBaseSpecifier(ClassDecl); 1438 if (Result.isInvalid()) { 1439 // Skip the rest of this base specifier, up until the comma or 1440 // opening brace. 1441 SkipUntil(tok::comma, tok::l_brace, true, true); 1442 } else { 1443 // Add this to our array of base specifiers. 1444 BaseInfo.push_back(Result.get()); 1445 } 1446 1447 // If the next token is a comma, consume it and keep reading 1448 // base-specifiers. 1449 if (Tok.isNot(tok::comma)) break; 1450 1451 // Consume the comma. 1452 ConsumeToken(); 1453 } 1454 1455 // Attach the base specifiers 1456 Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size()); 1457 } 1458 1459 /// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is 1460 /// one entry in the base class list of a class specifier, for example: 1461 /// class foo : public bar, virtual private baz { 1462 /// 'public bar' and 'virtual private baz' are each base-specifiers. 1463 /// 1464 /// base-specifier: [C++ class.derived] 1465 /// ::[opt] nested-name-specifier[opt] class-name 1466 /// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] 1467 /// base-type-specifier 1468 /// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] 1469 /// base-type-specifier 1470 Parser::BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) { 1471 bool IsVirtual = false; 1472 SourceLocation StartLoc = Tok.getLocation(); 1473 1474 // Parse the 'virtual' keyword. 1475 if (Tok.is(tok::kw_virtual)) { 1476 ConsumeToken(); 1477 IsVirtual = true; 1478 } 1479 1480 // Parse an (optional) access specifier. 1481 AccessSpecifier Access = getAccessSpecifierIfPresent(); 1482 if (Access != AS_none) 1483 ConsumeToken(); 1484 1485 // Parse the 'virtual' keyword (again!), in case it came after the 1486 // access specifier. 1487 if (Tok.is(tok::kw_virtual)) { 1488 SourceLocation VirtualLoc = ConsumeToken(); 1489 if (IsVirtual) { 1490 // Complain about duplicate 'virtual' 1491 Diag(VirtualLoc, diag::err_dup_virtual) 1492 << FixItHint::CreateRemoval(VirtualLoc); 1493 } 1494 1495 IsVirtual = true; 1496 } 1497 1498 // Parse the class-name. 1499 SourceLocation EndLocation; 1500 SourceLocation BaseLoc; 1501 TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation); 1502 if (BaseType.isInvalid()) 1503 return true; 1504 1505 // Parse the optional ellipsis (for a pack expansion). The ellipsis is 1506 // actually part of the base-specifier-list grammar productions, but we 1507 // parse it here for convenience. 1508 SourceLocation EllipsisLoc; 1509 if (Tok.is(tok::ellipsis)) 1510 EllipsisLoc = ConsumeToken(); 1511 1512 // Find the complete source range for the base-specifier. 1513 SourceRange Range(StartLoc, EndLocation); 1514 1515 // Notify semantic analysis that we have parsed a complete 1516 // base-specifier. 1517 return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, 1518 BaseType.get(), BaseLoc, EllipsisLoc); 1519 } 1520 1521 /// getAccessSpecifierIfPresent - Determine whether the next token is 1522 /// a C++ access-specifier. 1523 /// 1524 /// access-specifier: [C++ class.derived] 1525 /// 'private' 1526 /// 'protected' 1527 /// 'public' 1528 AccessSpecifier Parser::getAccessSpecifierIfPresent() const { 1529 switch (Tok.getKind()) { 1530 default: return AS_none; 1531 case tok::kw_private: return AS_private; 1532 case tok::kw_protected: return AS_protected; 1533 case tok::kw_public: return AS_public; 1534 } 1535 } 1536 1537 /// \brief If the given declarator has any parts for which parsing has to be 1538 /// delayed, e.g., default arguments or an exception-specification, create a 1539 /// late-parsed method declaration record to handle the parsing at the end of 1540 /// the class definition. 1541 void Parser::HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo, 1542 Decl *ThisDecl) { 1543 // We just declared a member function. If this member function 1544 // has any default arguments or an exception-specification, we'll need to 1545 // parse them later. 1546 LateParsedMethodDeclaration *LateMethod = 0; 1547 DeclaratorChunk::FunctionTypeInfo &FTI 1548 = DeclaratorInfo.getFunctionTypeInfo(); 1549 1550 // If there was a delayed exception-specification, hold onto its tokens. 1551 if (FTI.getExceptionSpecType() == EST_Delayed) { 1552 // Push this method onto the stack of late-parsed method 1553 // declarations. 1554 LateMethod = new LateParsedMethodDeclaration(this, ThisDecl); 1555 getCurrentClass().LateParsedDeclarations.push_back(LateMethod); 1556 LateMethod->TemplateScope = getCurScope()->isTemplateParamScope(); 1557 1558 // Stash the exception-specification tokens in the late-pased mthod. 1559 LateMethod->ExceptionSpecTokens = FTI.ExceptionSpecTokens; 1560 FTI.ExceptionSpecTokens = 0; 1561 1562 // Reserve space for the parameters. 1563 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 1564 } 1565 1566 for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { 1567 if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { 1568 if (!LateMethod) { 1569 // Push this method onto the stack of late-parsed method 1570 // declarations. 1571 LateMethod = new LateParsedMethodDeclaration(this, ThisDecl); 1572 getCurrentClass().LateParsedDeclarations.push_back(LateMethod); 1573 LateMethod->TemplateScope = getCurScope()->isTemplateParamScope(); 1574 1575 // Add all of the parameters prior to this one (they don't 1576 // have default arguments). 1577 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 1578 for (unsigned I = 0; I < ParamIdx; ++I) 1579 LateMethod->DefaultArgs.push_back( 1580 LateParsedDefaultArgument(FTI.ArgInfo[I].Param)); 1581 } 1582 1583 // Add this parameter to the list of parameters (it may or may 1584 // not have a default argument). 1585 LateMethod->DefaultArgs.push_back( 1586 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, 1587 FTI.ArgInfo[ParamIdx].DefaultArgTokens)); 1588 } 1589 } 1590 } 1591 1592 /// isCXX0XVirtSpecifier - Determine whether the given token is a C++0x 1593 /// virt-specifier. 1594 /// 1595 /// virt-specifier: 1596 /// override 1597 /// final 1598 VirtSpecifiers::Specifier Parser::isCXX0XVirtSpecifier(const Token &Tok) const { 1599 if (!getLangOpts().CPlusPlus) 1600 return VirtSpecifiers::VS_None; 1601 1602 if (Tok.is(tok::identifier)) { 1603 IdentifierInfo *II = Tok.getIdentifierInfo(); 1604 1605 // Initialize the contextual keywords. 1606 if (!Ident_final) { 1607 Ident_final = &PP.getIdentifierTable().get("final"); 1608 Ident_override = &PP.getIdentifierTable().get("override"); 1609 } 1610 1611 if (II == Ident_override) 1612 return VirtSpecifiers::VS_Override; 1613 1614 if (II == Ident_final) 1615 return VirtSpecifiers::VS_Final; 1616 } 1617 1618 return VirtSpecifiers::VS_None; 1619 } 1620 1621 /// ParseOptionalCXX0XVirtSpecifierSeq - Parse a virt-specifier-seq. 1622 /// 1623 /// virt-specifier-seq: 1624 /// virt-specifier 1625 /// virt-specifier-seq virt-specifier 1626 void Parser::ParseOptionalCXX0XVirtSpecifierSeq(VirtSpecifiers &VS) { 1627 while (true) { 1628 VirtSpecifiers::Specifier Specifier = isCXX0XVirtSpecifier(); 1629 if (Specifier == VirtSpecifiers::VS_None) 1630 return; 1631 1632 // C++ [class.mem]p8: 1633 // A virt-specifier-seq shall contain at most one of each virt-specifier. 1634 const char *PrevSpec = 0; 1635 if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec)) 1636 Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier) 1637 << PrevSpec 1638 << FixItHint::CreateRemoval(Tok.getLocation()); 1639 1640 Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ? 1641 diag::warn_cxx98_compat_override_control_keyword : 1642 diag::ext_override_control_keyword) 1643 << VirtSpecifiers::getSpecifierName(Specifier); 1644 ConsumeToken(); 1645 } 1646 } 1647 1648 /// isCXX0XFinalKeyword - Determine whether the next token is a C++0x 1649 /// contextual 'final' keyword. 1650 bool Parser::isCXX0XFinalKeyword() const { 1651 if (!getLangOpts().CPlusPlus) 1652 return false; 1653 1654 if (!Tok.is(tok::identifier)) 1655 return false; 1656 1657 // Initialize the contextual keywords. 1658 if (!Ident_final) { 1659 Ident_final = &PP.getIdentifierTable().get("final"); 1660 Ident_override = &PP.getIdentifierTable().get("override"); 1661 } 1662 1663 return Tok.getIdentifierInfo() == Ident_final; 1664 } 1665 1666 /// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. 1667 /// 1668 /// member-declaration: 1669 /// decl-specifier-seq[opt] member-declarator-list[opt] ';' 1670 /// function-definition ';'[opt] 1671 /// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] 1672 /// using-declaration [TODO] 1673 /// [C++0x] static_assert-declaration 1674 /// template-declaration 1675 /// [GNU] '__extension__' member-declaration 1676 /// 1677 /// member-declarator-list: 1678 /// member-declarator 1679 /// member-declarator-list ',' member-declarator 1680 /// 1681 /// member-declarator: 1682 /// declarator virt-specifier-seq[opt] pure-specifier[opt] 1683 /// declarator constant-initializer[opt] 1684 /// [C++11] declarator brace-or-equal-initializer[opt] 1685 /// identifier[opt] ':' constant-expression 1686 /// 1687 /// virt-specifier-seq: 1688 /// virt-specifier 1689 /// virt-specifier-seq virt-specifier 1690 /// 1691 /// virt-specifier: 1692 /// override 1693 /// final 1694 /// 1695 /// pure-specifier: 1696 /// '= 0' 1697 /// 1698 /// constant-initializer: 1699 /// '=' constant-expression 1700 /// 1701 void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS, 1702 AttributeList *AccessAttrs, 1703 const ParsedTemplateInfo &TemplateInfo, 1704 ParsingDeclRAIIObject *TemplateDiags) { 1705 if (Tok.is(tok::at)) { 1706 if (getLangOpts().ObjC1 && NextToken().isObjCAtKeyword(tok::objc_defs)) 1707 Diag(Tok, diag::err_at_defs_cxx); 1708 else 1709 Diag(Tok, diag::err_at_in_class); 1710 1711 ConsumeToken(); 1712 SkipUntil(tok::r_brace); 1713 return; 1714 } 1715 1716 // Access declarations. 1717 if (!TemplateInfo.Kind && 1718 (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && 1719 !TryAnnotateCXXScopeToken() && 1720 Tok.is(tok::annot_cxxscope)) { 1721 bool isAccessDecl = false; 1722 if (NextToken().is(tok::identifier)) 1723 isAccessDecl = GetLookAheadToken(2).is(tok::semi); 1724 else 1725 isAccessDecl = NextToken().is(tok::kw_operator); 1726 1727 if (isAccessDecl) { 1728 // Collect the scope specifier token we annotated earlier. 1729 CXXScopeSpec SS; 1730 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), 1731 /*EnteringContext=*/false); 1732 1733 // Try to parse an unqualified-id. 1734 SourceLocation TemplateKWLoc; 1735 UnqualifiedId Name; 1736 if (ParseUnqualifiedId(SS, false, true, true, ParsedType(), 1737 TemplateKWLoc, Name)) { 1738 SkipUntil(tok::semi); 1739 return; 1740 } 1741 1742 // TODO: recover from mistakenly-qualified operator declarations. 1743 if (ExpectAndConsume(tok::semi, 1744 diag::err_expected_semi_after, 1745 "access declaration", 1746 tok::semi)) 1747 return; 1748 1749 Actions.ActOnUsingDeclaration(getCurScope(), AS, 1750 false, SourceLocation(), 1751 SS, Name, 1752 /* AttrList */ 0, 1753 /* IsTypeName */ false, 1754 SourceLocation()); 1755 return; 1756 } 1757 } 1758 1759 // static_assert-declaration 1760 if (Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) { 1761 // FIXME: Check for templates 1762 SourceLocation DeclEnd; 1763 ParseStaticAssertDeclaration(DeclEnd); 1764 return; 1765 } 1766 1767 if (Tok.is(tok::kw_template)) { 1768 assert(!TemplateInfo.TemplateParams && 1769 "Nested template improperly parsed?"); 1770 SourceLocation DeclEnd; 1771 ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd, 1772 AS, AccessAttrs); 1773 return; 1774 } 1775 1776 // Handle: member-declaration ::= '__extension__' member-declaration 1777 if (Tok.is(tok::kw___extension__)) { 1778 // __extension__ silences extension warnings in the subexpression. 1779 ExtensionRAIIObject O(Diags); // Use RAII to do this. 1780 ConsumeToken(); 1781 return ParseCXXClassMemberDeclaration(AS, AccessAttrs, 1782 TemplateInfo, TemplateDiags); 1783 } 1784 1785 // Don't parse FOO:BAR as if it were a typo for FOO::BAR, in this context it 1786 // is a bitfield. 1787 ColonProtectionRAIIObject X(*this); 1788 1789 ParsedAttributesWithRange attrs(AttrFactory); 1790 // Optional C++0x attribute-specifier 1791 MaybeParseCXX0XAttributes(attrs); 1792 MaybeParseMicrosoftAttributes(attrs); 1793 1794 if (Tok.is(tok::kw_using)) { 1795 ProhibitAttributes(attrs); 1796 1797 // Eat 'using'. 1798 SourceLocation UsingLoc = ConsumeToken(); 1799 1800 if (Tok.is(tok::kw_namespace)) { 1801 Diag(UsingLoc, diag::err_using_namespace_in_class); 1802 SkipUntil(tok::semi, true, true); 1803 } else { 1804 SourceLocation DeclEnd; 1805 // Otherwise, it must be a using-declaration or an alias-declaration. 1806 ParseUsingDeclaration(Declarator::MemberContext, TemplateInfo, 1807 UsingLoc, DeclEnd, AS); 1808 } 1809 return; 1810 } 1811 1812 // Hold late-parsed attributes so we can attach a Decl to them later. 1813 LateParsedAttrList CommonLateParsedAttrs; 1814 1815 // decl-specifier-seq: 1816 // Parse the common declaration-specifiers piece. 1817 ParsingDeclSpec DS(*this, TemplateDiags); 1818 DS.takeAttributesFrom(attrs); 1819 ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class, 1820 &CommonLateParsedAttrs); 1821 1822 MultiTemplateParamsArg TemplateParams(Actions, 1823 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0, 1824 TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); 1825 1826 if (Tok.is(tok::semi)) { 1827 ConsumeToken(); 1828 Decl *TheDecl = 1829 Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS, TemplateParams); 1830 DS.complete(TheDecl); 1831 return; 1832 } 1833 1834 ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); 1835 VirtSpecifiers VS; 1836 1837 // Hold late-parsed attributes so we can attach a Decl to them later. 1838 LateParsedAttrList LateParsedAttrs; 1839 1840 SourceLocation EqualLoc; 1841 bool HasInitializer = false; 1842 ExprResult Init; 1843 if (Tok.isNot(tok::colon)) { 1844 // Don't parse FOO:BAR as if it were a typo for FOO::BAR. 1845 ColonProtectionRAIIObject X(*this); 1846 1847 // Parse the first declarator. 1848 ParseDeclarator(DeclaratorInfo); 1849 // Error parsin g the declarator? 1850 if (!DeclaratorInfo.hasName()) { 1851 // If so, skip until the semi-colon or a }. 1852 SkipUntil(tok::r_brace, true, true); 1853 if (Tok.is(tok::semi)) 1854 ConsumeToken(); 1855 return; 1856 } 1857 1858 ParseOptionalCXX0XVirtSpecifierSeq(VS); 1859 1860 // If attributes exist after the declarator, but before an '{', parse them. 1861 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 1862 1863 // MSVC permits pure specifier on inline functions declared at class scope. 1864 // Hence check for =0 before checking for function definition. 1865 if (getLangOpts().MicrosoftExt && Tok.is(tok::equal) && 1866 DeclaratorInfo.isFunctionDeclarator() && 1867 NextToken().is(tok::numeric_constant)) { 1868 EqualLoc = ConsumeToken(); 1869 Init = ParseInitializer(); 1870 if (Init.isInvalid()) 1871 SkipUntil(tok::comma, true, true); 1872 else 1873 HasInitializer = true; 1874 } 1875 1876 FunctionDefinitionKind DefinitionKind = FDK_Declaration; 1877 // function-definition: 1878 // 1879 // In C++11, a non-function declarator followed by an open brace is a 1880 // braced-init-list for an in-class member initialization, not an 1881 // erroneous function definition. 1882 if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus0x) { 1883 DefinitionKind = FDK_Definition; 1884 } else if (DeclaratorInfo.isFunctionDeclarator()) { 1885 if (Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) { 1886 DefinitionKind = FDK_Definition; 1887 } else if (Tok.is(tok::equal)) { 1888 const Token &KW = NextToken(); 1889 if (KW.is(tok::kw_default)) 1890 DefinitionKind = FDK_Defaulted; 1891 else if (KW.is(tok::kw_delete)) 1892 DefinitionKind = FDK_Deleted; 1893 } 1894 } 1895 1896 if (DefinitionKind) { 1897 if (!DeclaratorInfo.isFunctionDeclarator()) { 1898 Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params); 1899 ConsumeBrace(); 1900 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1901 1902 // Consume the optional ';' 1903 if (Tok.is(tok::semi)) 1904 ConsumeToken(); 1905 return; 1906 } 1907 1908 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 1909 Diag(DeclaratorInfo.getIdentifierLoc(), 1910 diag::err_function_declared_typedef); 1911 // This recovery skips the entire function body. It would be nice 1912 // to simply call ParseCXXInlineMethodDef() below, however Sema 1913 // assumes the declarator represents a function, not a typedef. 1914 ConsumeBrace(); 1915 SkipUntil(tok::r_brace, /*StopAtSemi*/false); 1916 1917 // Consume the optional ';' 1918 if (Tok.is(tok::semi)) 1919 ConsumeToken(); 1920 return; 1921 } 1922 1923 Decl *FunDecl = 1924 ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo, 1925 VS, DefinitionKind, Init); 1926 1927 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 1928 CommonLateParsedAttrs[i]->addDecl(FunDecl); 1929 } 1930 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 1931 LateParsedAttrs[i]->addDecl(FunDecl); 1932 } 1933 LateParsedAttrs.clear(); 1934 1935 // Consume the ';' - it's optional unless we have a delete or default 1936 if (Tok.is(tok::semi)) { 1937 ConsumeToken(); 1938 } 1939 1940 return; 1941 } 1942 } 1943 1944 // member-declarator-list: 1945 // member-declarator 1946 // member-declarator-list ',' member-declarator 1947 1948 SmallVector<Decl *, 8> DeclsInGroup; 1949 ExprResult BitfieldSize; 1950 bool ExpectSemi = true; 1951 1952 while (1) { 1953 // member-declarator: 1954 // declarator pure-specifier[opt] 1955 // declarator brace-or-equal-initializer[opt] 1956 // identifier[opt] ':' constant-expression 1957 if (Tok.is(tok::colon)) { 1958 ConsumeToken(); 1959 BitfieldSize = ParseConstantExpression(); 1960 if (BitfieldSize.isInvalid()) 1961 SkipUntil(tok::comma, true, true); 1962 } 1963 1964 // If a simple-asm-expr is present, parse it. 1965 if (Tok.is(tok::kw_asm)) { 1966 SourceLocation Loc; 1967 ExprResult AsmLabel(ParseSimpleAsm(&Loc)); 1968 if (AsmLabel.isInvalid()) 1969 SkipUntil(tok::comma, true, true); 1970 1971 DeclaratorInfo.setAsmLabel(AsmLabel.release()); 1972 DeclaratorInfo.SetRangeEnd(Loc); 1973 } 1974 1975 // If attributes exist after the declarator, parse them. 1976 MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); 1977 1978 // FIXME: When g++ adds support for this, we'll need to check whether it 1979 // goes before or after the GNU attributes and __asm__. 1980 ParseOptionalCXX0XVirtSpecifierSeq(VS); 1981 1982 bool HasDeferredInitializer = false; 1983 if ((Tok.is(tok::equal) || Tok.is(tok::l_brace)) && !HasInitializer) { 1984 if (BitfieldSize.get()) { 1985 Diag(Tok, diag::err_bitfield_member_init); 1986 SkipUntil(tok::comma, true, true); 1987 } else { 1988 HasInitializer = true; 1989 HasDeferredInitializer = !DeclaratorInfo.isDeclarationOfFunction() && 1990 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 1991 != DeclSpec::SCS_static && 1992 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 1993 != DeclSpec::SCS_typedef; 1994 } 1995 } 1996 1997 // NOTE: If Sema is the Action module and declarator is an instance field, 1998 // this call will *not* return the created decl; It will return null. 1999 // See Sema::ActOnCXXMemberDeclarator for details. 2000 2001 Decl *ThisDecl = 0; 2002 if (DS.isFriendSpecified()) { 2003 // TODO: handle initializers, bitfields, 'delete' 2004 ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo, 2005 move(TemplateParams)); 2006 } else { 2007 ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, 2008 DeclaratorInfo, 2009 move(TemplateParams), 2010 BitfieldSize.release(), 2011 VS, HasDeferredInitializer); 2012 if (AccessAttrs) 2013 Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs, 2014 false, true); 2015 } 2016 2017 // Set the Decl for any late parsed attributes 2018 for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { 2019 CommonLateParsedAttrs[i]->addDecl(ThisDecl); 2020 } 2021 for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { 2022 LateParsedAttrs[i]->addDecl(ThisDecl); 2023 } 2024 LateParsedAttrs.clear(); 2025 2026 // Handle the initializer. 2027 if (HasDeferredInitializer) { 2028 // The initializer was deferred; parse it and cache the tokens. 2029 Diag(Tok, getLangOpts().CPlusPlus0x ? 2030 diag::warn_cxx98_compat_nonstatic_member_init : 2031 diag::ext_nonstatic_member_init); 2032 2033 if (DeclaratorInfo.isArrayOfUnknownBound()) { 2034 // C++0x [dcl.array]p3: An array bound may also be omitted when the 2035 // declarator is followed by an initializer. 2036 // 2037 // A brace-or-equal-initializer for a member-declarator is not an 2038 // initializer in the grammar, so this is ill-formed. 2039 Diag(Tok, diag::err_incomplete_array_member_init); 2040 SkipUntil(tok::comma, true, true); 2041 if (ThisDecl) 2042 // Avoid later warnings about a class member of incomplete type. 2043 ThisDecl->setInvalidDecl(); 2044 } else 2045 ParseCXXNonStaticMemberInitializer(ThisDecl); 2046 } else if (HasInitializer) { 2047 // Normal initializer. 2048 if (!Init.isUsable()) 2049 Init = ParseCXXMemberInitializer(ThisDecl, 2050 DeclaratorInfo.isDeclarationOfFunction(), EqualLoc); 2051 2052 if (Init.isInvalid()) 2053 SkipUntil(tok::comma, true, true); 2054 else if (ThisDecl) 2055 Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(), 2056 DS.getTypeSpecType() == DeclSpec::TST_auto); 2057 } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static) { 2058 // No initializer. 2059 Actions.ActOnUninitializedDecl(ThisDecl, 2060 DS.getTypeSpecType() == DeclSpec::TST_auto); 2061 } 2062 2063 if (ThisDecl) { 2064 Actions.FinalizeDeclaration(ThisDecl); 2065 DeclsInGroup.push_back(ThisDecl); 2066 } 2067 2068 if (DeclaratorInfo.isFunctionDeclarator() && 2069 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 2070 != DeclSpec::SCS_typedef) { 2071 HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl); 2072 } 2073 2074 DeclaratorInfo.complete(ThisDecl); 2075 2076 // If we don't have a comma, it is either the end of the list (a ';') 2077 // or an error, bail out. 2078 if (Tok.isNot(tok::comma)) 2079 break; 2080 2081 // Consume the comma. 2082 SourceLocation CommaLoc = ConsumeToken(); 2083 2084 if (Tok.isAtStartOfLine() && 2085 !MightBeDeclarator(Declarator::MemberContext)) { 2086 // This comma was followed by a line-break and something which can't be 2087 // the start of a declarator. The comma was probably a typo for a 2088 // semicolon. 2089 Diag(CommaLoc, diag::err_expected_semi_declaration) 2090 << FixItHint::CreateReplacement(CommaLoc, ";"); 2091 ExpectSemi = false; 2092 break; 2093 } 2094 2095 // Parse the next declarator. 2096 DeclaratorInfo.clear(); 2097 VS.clear(); 2098 BitfieldSize = true; 2099 Init = true; 2100 HasInitializer = false; 2101 DeclaratorInfo.setCommaLoc(CommaLoc); 2102 2103 // Attributes are only allowed on the second declarator. 2104 MaybeParseGNUAttributes(DeclaratorInfo); 2105 2106 if (Tok.isNot(tok::colon)) 2107 ParseDeclarator(DeclaratorInfo); 2108 } 2109 2110 if (ExpectSemi && 2111 ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) { 2112 // Skip to end of block or statement. 2113 SkipUntil(tok::r_brace, true, true); 2114 // If we stopped at a ';', eat it. 2115 if (Tok.is(tok::semi)) ConsumeToken(); 2116 return; 2117 } 2118 2119 Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup.data(), 2120 DeclsInGroup.size()); 2121 } 2122 2123 /// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer or 2124 /// pure-specifier. Also detect and reject any attempted defaulted/deleted 2125 /// function definition. The location of the '=', if any, will be placed in 2126 /// EqualLoc. 2127 /// 2128 /// pure-specifier: 2129 /// '= 0' 2130 /// 2131 /// brace-or-equal-initializer: 2132 /// '=' initializer-expression 2133 /// braced-init-list 2134 /// 2135 /// initializer-clause: 2136 /// assignment-expression 2137 /// braced-init-list 2138 /// 2139 /// defaulted/deleted function-definition: 2140 /// '=' 'default' 2141 /// '=' 'delete' 2142 /// 2143 /// Prior to C++0x, the assignment-expression in an initializer-clause must 2144 /// be a constant-expression. 2145 ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction, 2146 SourceLocation &EqualLoc) { 2147 assert((Tok.is(tok::equal) || Tok.is(tok::l_brace)) 2148 && "Data member initializer not starting with '=' or '{'"); 2149 2150 EnterExpressionEvaluationContext Context(Actions, 2151 Sema::PotentiallyEvaluated, 2152 D); 2153 if (Tok.is(tok::equal)) { 2154 EqualLoc = ConsumeToken(); 2155 if (Tok.is(tok::kw_delete)) { 2156 // In principle, an initializer of '= delete p;' is legal, but it will 2157 // never type-check. It's better to diagnose it as an ill-formed expression 2158 // than as an ill-formed deleted non-function member. 2159 // An initializer of '= delete p, foo' will never be parsed, because 2160 // a top-level comma always ends the initializer expression. 2161 const Token &Next = NextToken(); 2162 if (IsFunction || Next.is(tok::semi) || Next.is(tok::comma) || 2163 Next.is(tok::eof)) { 2164 if (IsFunction) 2165 Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration) 2166 << 1 /* delete */; 2167 else 2168 Diag(ConsumeToken(), diag::err_deleted_non_function); 2169 return ExprResult(); 2170 } 2171 } else if (Tok.is(tok::kw_default)) { 2172 if (IsFunction) 2173 Diag(Tok, diag::err_default_delete_in_multiple_declaration) 2174 << 0 /* default */; 2175 else 2176 Diag(ConsumeToken(), diag::err_default_special_members); 2177 return ExprResult(); 2178 } 2179 2180 } 2181 return ParseInitializer(); 2182 } 2183 2184 /// ParseCXXMemberSpecification - Parse the class definition. 2185 /// 2186 /// member-specification: 2187 /// member-declaration member-specification[opt] 2188 /// access-specifier ':' member-specification[opt] 2189 /// 2190 void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, 2191 unsigned TagType, Decl *TagDecl) { 2192 assert((TagType == DeclSpec::TST_struct || 2193 TagType == DeclSpec::TST_union || 2194 TagType == DeclSpec::TST_class) && "Invalid TagType!"); 2195 2196 PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc, 2197 "parsing struct/union/class body"); 2198 2199 // Determine whether this is a non-nested class. Note that local 2200 // classes are *not* considered to be nested classes. 2201 bool NonNestedClass = true; 2202 if (!ClassStack.empty()) { 2203 for (const Scope *S = getCurScope(); S; S = S->getParent()) { 2204 if (S->isClassScope()) { 2205 // We're inside a class scope, so this is a nested class. 2206 NonNestedClass = false; 2207 break; 2208 } 2209 2210 if ((S->getFlags() & Scope::FnScope)) { 2211 // If we're in a function or function template declared in the 2212 // body of a class, then this is a local class rather than a 2213 // nested class. 2214 const Scope *Parent = S->getParent(); 2215 if (Parent->isTemplateParamScope()) 2216 Parent = Parent->getParent(); 2217 if (Parent->isClassScope()) 2218 break; 2219 } 2220 } 2221 } 2222 2223 // Enter a scope for the class. 2224 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); 2225 2226 // Note that we are parsing a new (potentially-nested) class definition. 2227 ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass); 2228 2229 if (TagDecl) 2230 Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); 2231 2232 SourceLocation FinalLoc; 2233 2234 // Parse the optional 'final' keyword. 2235 if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) { 2236 assert(isCXX0XFinalKeyword() && "not a class definition"); 2237 FinalLoc = ConsumeToken(); 2238 2239 Diag(FinalLoc, getLangOpts().CPlusPlus0x ? 2240 diag::warn_cxx98_compat_override_control_keyword : 2241 diag::ext_override_control_keyword) << "final"; 2242 } 2243 2244 if (Tok.is(tok::colon)) { 2245 ParseBaseClause(TagDecl); 2246 2247 if (!Tok.is(tok::l_brace)) { 2248 Diag(Tok, diag::err_expected_lbrace_after_base_specifiers); 2249 2250 if (TagDecl) 2251 Actions.ActOnTagDefinitionError(getCurScope(), TagDecl); 2252 return; 2253 } 2254 } 2255 2256 assert(Tok.is(tok::l_brace)); 2257 BalancedDelimiterTracker T(*this, tok::l_brace); 2258 T.consumeOpen(); 2259 2260 if (TagDecl) 2261 Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc, 2262 T.getOpenLocation()); 2263 2264 // C++ 11p3: Members of a class defined with the keyword class are private 2265 // by default. Members of a class defined with the keywords struct or union 2266 // are public by default. 2267 AccessSpecifier CurAS; 2268 if (TagType == DeclSpec::TST_class) 2269 CurAS = AS_private; 2270 else 2271 CurAS = AS_public; 2272 ParsedAttributes AccessAttrs(AttrFactory); 2273 2274 if (TagDecl) { 2275 // While we still have something to read, read the member-declarations. 2276 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 2277 // Each iteration of this loop reads one member-declaration. 2278 2279 if (getLangOpts().MicrosoftExt && (Tok.is(tok::kw___if_exists) || 2280 Tok.is(tok::kw___if_not_exists))) { 2281 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 2282 continue; 2283 } 2284 2285 // Check for extraneous top-level semicolon. 2286 if (Tok.is(tok::semi)) { 2287 Diag(Tok, diag::ext_extra_struct_semi) 2288 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType) 2289 << FixItHint::CreateRemoval(Tok.getLocation()); 2290 ConsumeToken(); 2291 continue; 2292 } 2293 2294 if (Tok.is(tok::annot_pragma_vis)) { 2295 HandlePragmaVisibility(); 2296 continue; 2297 } 2298 2299 if (Tok.is(tok::annot_pragma_pack)) { 2300 HandlePragmaPack(); 2301 continue; 2302 } 2303 2304 AccessSpecifier AS = getAccessSpecifierIfPresent(); 2305 if (AS != AS_none) { 2306 // Current token is a C++ access specifier. 2307 CurAS = AS; 2308 SourceLocation ASLoc = Tok.getLocation(); 2309 unsigned TokLength = Tok.getLength(); 2310 ConsumeToken(); 2311 AccessAttrs.clear(); 2312 MaybeParseGNUAttributes(AccessAttrs); 2313 2314 SourceLocation EndLoc; 2315 if (Tok.is(tok::colon)) { 2316 EndLoc = Tok.getLocation(); 2317 ConsumeToken(); 2318 } else if (Tok.is(tok::semi)) { 2319 EndLoc = Tok.getLocation(); 2320 ConsumeToken(); 2321 Diag(EndLoc, diag::err_expected_colon) 2322 << FixItHint::CreateReplacement(EndLoc, ":"); 2323 } else { 2324 EndLoc = ASLoc.getLocWithOffset(TokLength); 2325 Diag(EndLoc, diag::err_expected_colon) 2326 << FixItHint::CreateInsertion(EndLoc, ":"); 2327 } 2328 2329 if (Actions.ActOnAccessSpecifier(AS, ASLoc, EndLoc, 2330 AccessAttrs.getList())) { 2331 // found another attribute than only annotations 2332 AccessAttrs.clear(); 2333 } 2334 2335 continue; 2336 } 2337 2338 // FIXME: Make sure we don't have a template here. 2339 2340 // Parse all the comma separated declarators. 2341 ParseCXXClassMemberDeclaration(CurAS, AccessAttrs.getList()); 2342 } 2343 2344 T.consumeClose(); 2345 } else { 2346 SkipUntil(tok::r_brace, false, false); 2347 } 2348 2349 // If attributes exist after class contents, parse them. 2350 ParsedAttributes attrs(AttrFactory); 2351 MaybeParseGNUAttributes(attrs); 2352 2353 if (TagDecl) 2354 Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl, 2355 T.getOpenLocation(), 2356 T.getCloseLocation(), 2357 attrs.getList()); 2358 2359 // C++11 [class.mem]p2: 2360 // Within the class member-specification, the class is regarded as complete 2361 // within function bodies, default arguments, exception-specifications, and 2362 // brace-or-equal-initializers for non-static data members (including such 2363 // things in nested classes). 2364 if (TagDecl && NonNestedClass) { 2365 // We are not inside a nested class. This class and its nested classes 2366 // are complete and we can parse the delayed portions of method 2367 // declarations and the lexed inline method definitions, along with any 2368 // delayed attributes. 2369 SourceLocation SavedPrevTokLocation = PrevTokLocation; 2370 ParseLexedAttributes(getCurrentClass()); 2371 ParseLexedMethodDeclarations(getCurrentClass()); 2372 ParseLexedMemberInitializers(getCurrentClass()); 2373 ParseLexedMethodDefs(getCurrentClass()); 2374 PrevTokLocation = SavedPrevTokLocation; 2375 } 2376 2377 if (TagDecl) 2378 Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, 2379 T.getCloseLocation()); 2380 2381 // Leave the class scope. 2382 ParsingDef.Pop(); 2383 ClassScope.Exit(); 2384 } 2385 2386 /// ParseConstructorInitializer - Parse a C++ constructor initializer, 2387 /// which explicitly initializes the members or base classes of a 2388 /// class (C++ [class.base.init]). For example, the three initializers 2389 /// after the ':' in the Derived constructor below: 2390 /// 2391 /// @code 2392 /// class Base { }; 2393 /// class Derived : Base { 2394 /// int x; 2395 /// float f; 2396 /// public: 2397 /// Derived(float f) : Base(), x(17), f(f) { } 2398 /// }; 2399 /// @endcode 2400 /// 2401 /// [C++] ctor-initializer: 2402 /// ':' mem-initializer-list 2403 /// 2404 /// [C++] mem-initializer-list: 2405 /// mem-initializer ...[opt] 2406 /// mem-initializer ...[opt] , mem-initializer-list 2407 void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) { 2408 assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); 2409 2410 // Poison the SEH identifiers so they are flagged as illegal in constructor initializers 2411 PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true); 2412 SourceLocation ColonLoc = ConsumeToken(); 2413 2414 SmallVector<CXXCtorInitializer*, 4> MemInitializers; 2415 bool AnyErrors = false; 2416 2417 do { 2418 if (Tok.is(tok::code_completion)) { 2419 Actions.CodeCompleteConstructorInitializer(ConstructorDecl, 2420 MemInitializers.data(), 2421 MemInitializers.size()); 2422 return cutOffParsing(); 2423 } else { 2424 MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); 2425 if (!MemInit.isInvalid()) 2426 MemInitializers.push_back(MemInit.get()); 2427 else 2428 AnyErrors = true; 2429 } 2430 2431 if (Tok.is(tok::comma)) 2432 ConsumeToken(); 2433 else if (Tok.is(tok::l_brace)) 2434 break; 2435 // If the next token looks like a base or member initializer, assume that 2436 // we're just missing a comma. 2437 else if (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) { 2438 SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation); 2439 Diag(Loc, diag::err_ctor_init_missing_comma) 2440 << FixItHint::CreateInsertion(Loc, ", "); 2441 } else { 2442 // Skip over garbage, until we get to '{'. Don't eat the '{'. 2443 Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); 2444 SkipUntil(tok::l_brace, true, true); 2445 break; 2446 } 2447 } while (true); 2448 2449 Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, 2450 MemInitializers.data(), MemInitializers.size(), 2451 AnyErrors); 2452 } 2453 2454 /// ParseMemInitializer - Parse a C++ member initializer, which is 2455 /// part of a constructor initializer that explicitly initializes one 2456 /// member or base class (C++ [class.base.init]). See 2457 /// ParseConstructorInitializer for an example. 2458 /// 2459 /// [C++] mem-initializer: 2460 /// mem-initializer-id '(' expression-list[opt] ')' 2461 /// [C++0x] mem-initializer-id braced-init-list 2462 /// 2463 /// [C++] mem-initializer-id: 2464 /// '::'[opt] nested-name-specifier[opt] class-name 2465 /// identifier 2466 Parser::MemInitResult Parser::ParseMemInitializer(Decl *ConstructorDecl) { 2467 // parse '::'[opt] nested-name-specifier[opt] 2468 CXXScopeSpec SS; 2469 ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); 2470 ParsedType TemplateTypeTy; 2471 if (Tok.is(tok::annot_template_id)) { 2472 TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); 2473 if (TemplateId->Kind == TNK_Type_template || 2474 TemplateId->Kind == TNK_Dependent_template_name) { 2475 AnnotateTemplateIdTokenAsType(); 2476 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 2477 TemplateTypeTy = getTypeAnnotation(Tok); 2478 } 2479 } 2480 // Uses of decltype will already have been converted to annot_decltype by 2481 // ParseOptionalCXXScopeSpecifier at this point. 2482 if (!TemplateTypeTy && Tok.isNot(tok::identifier) 2483 && Tok.isNot(tok::annot_decltype)) { 2484 Diag(Tok, diag::err_expected_member_or_base_name); 2485 return true; 2486 } 2487 2488 IdentifierInfo *II = 0; 2489 DeclSpec DS(AttrFactory); 2490 SourceLocation IdLoc = Tok.getLocation(); 2491 if (Tok.is(tok::annot_decltype)) { 2492 // Get the decltype expression, if there is one. 2493 ParseDecltypeSpecifier(DS); 2494 } else { 2495 if (Tok.is(tok::identifier)) 2496 // Get the identifier. This may be a member name or a class name, 2497 // but we'll let the semantic analysis determine which it is. 2498 II = Tok.getIdentifierInfo(); 2499 ConsumeToken(); 2500 } 2501 2502 2503 // Parse the '('. 2504 if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) { 2505 Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists); 2506 2507 ExprResult InitList = ParseBraceInitializer(); 2508 if (InitList.isInvalid()) 2509 return true; 2510 2511 SourceLocation EllipsisLoc; 2512 if (Tok.is(tok::ellipsis)) 2513 EllipsisLoc = ConsumeToken(); 2514 2515 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2516 TemplateTypeTy, DS, IdLoc, 2517 InitList.take(), EllipsisLoc); 2518 } else if(Tok.is(tok::l_paren)) { 2519 BalancedDelimiterTracker T(*this, tok::l_paren); 2520 T.consumeOpen(); 2521 2522 // Parse the optional expression-list. 2523 ExprVector ArgExprs(Actions); 2524 CommaLocsTy CommaLocs; 2525 if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { 2526 SkipUntil(tok::r_paren); 2527 return true; 2528 } 2529 2530 T.consumeClose(); 2531 2532 SourceLocation EllipsisLoc; 2533 if (Tok.is(tok::ellipsis)) 2534 EllipsisLoc = ConsumeToken(); 2535 2536 return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II, 2537 TemplateTypeTy, DS, IdLoc, 2538 T.getOpenLocation(), ArgExprs.take(), 2539 ArgExprs.size(), T.getCloseLocation(), 2540 EllipsisLoc); 2541 } 2542 2543 Diag(Tok, getLangOpts().CPlusPlus0x ? diag::err_expected_lparen_or_lbrace 2544 : diag::err_expected_lparen); 2545 return true; 2546 } 2547 2548 /// \brief Parse a C++ exception-specification if present (C++0x [except.spec]). 2549 /// 2550 /// exception-specification: 2551 /// dynamic-exception-specification 2552 /// noexcept-specification 2553 /// 2554 /// noexcept-specification: 2555 /// 'noexcept' 2556 /// 'noexcept' '(' constant-expression ')' 2557 ExceptionSpecificationType 2558 Parser::tryParseExceptionSpecification(bool Delayed, 2559 SourceRange &SpecificationRange, 2560 SmallVectorImpl<ParsedType> &DynamicExceptions, 2561 SmallVectorImpl<SourceRange> &DynamicExceptionRanges, 2562 ExprResult &NoexceptExpr, 2563 CachedTokens *&ExceptionSpecTokens) { 2564 ExceptionSpecificationType Result = EST_None; 2565 ExceptionSpecTokens = 0; 2566 2567 // Handle delayed parsing of exception-specifications. 2568 if (Delayed) { 2569 if (Tok.isNot(tok::kw_throw) && Tok.isNot(tok::kw_noexcept)) 2570 return EST_None; 2571 2572 // Consume and cache the starting token. 2573 bool IsNoexcept = Tok.is(tok::kw_noexcept); 2574 Token StartTok = Tok; 2575 SpecificationRange = SourceRange(ConsumeToken()); 2576 2577 // Check for a '('. 2578 if (!Tok.is(tok::l_paren)) { 2579 // If this is a bare 'noexcept', we're done. 2580 if (IsNoexcept) { 2581 Diag(Tok, diag::warn_cxx98_compat_noexcept_decl); 2582 NoexceptExpr = 0; 2583 return EST_BasicNoexcept; 2584 } 2585 2586 Diag(Tok, diag::err_expected_lparen_after) << "throw"; 2587 return EST_DynamicNone; 2588 } 2589 2590 // Cache the tokens for the exception-specification. 2591 ExceptionSpecTokens = new CachedTokens; 2592 ExceptionSpecTokens->push_back(StartTok); // 'throw' or 'noexcept' 2593 ExceptionSpecTokens->push_back(Tok); // '(' 2594 SpecificationRange.setEnd(ConsumeParen()); // '(' 2595 2596 if (!ConsumeAndStoreUntil(tok::r_paren, *ExceptionSpecTokens, 2597 /*StopAtSemi=*/true, 2598 /*ConsumeFinalToken=*/true)) { 2599 NoexceptExpr = 0; 2600 delete ExceptionSpecTokens; 2601 ExceptionSpecTokens = 0; 2602 return IsNoexcept? EST_BasicNoexcept : EST_DynamicNone; 2603 } 2604 SpecificationRange.setEnd(Tok.getLocation()); 2605 2606 // Add the 'stop' token. 2607 Token End; 2608 End.startToken(); 2609 End.setKind(tok::cxx_exceptspec_end); 2610 End.setLocation(Tok.getLocation()); 2611 ExceptionSpecTokens->push_back(End); 2612 return EST_Delayed; 2613 } 2614 2615 // See if there's a dynamic specification. 2616 if (Tok.is(tok::kw_throw)) { 2617 Result = ParseDynamicExceptionSpecification(SpecificationRange, 2618 DynamicExceptions, 2619 DynamicExceptionRanges); 2620 assert(DynamicExceptions.size() == DynamicExceptionRanges.size() && 2621 "Produced different number of exception types and ranges."); 2622 } 2623 2624 // If there's no noexcept specification, we're done. 2625 if (Tok.isNot(tok::kw_noexcept)) 2626 return Result; 2627 2628 Diag(Tok, diag::warn_cxx98_compat_noexcept_decl); 2629 2630 // If we already had a dynamic specification, parse the noexcept for, 2631 // recovery, but emit a diagnostic and don't store the results. 2632 SourceRange NoexceptRange; 2633 ExceptionSpecificationType NoexceptType = EST_None; 2634 2635 SourceLocation KeywordLoc = ConsumeToken(); 2636 if (Tok.is(tok::l_paren)) { 2637 // There is an argument. 2638 BalancedDelimiterTracker T(*this, tok::l_paren); 2639 T.consumeOpen(); 2640 NoexceptType = EST_ComputedNoexcept; 2641 NoexceptExpr = ParseConstantExpression(); 2642 // The argument must be contextually convertible to bool. We use 2643 // ActOnBooleanCondition for this purpose. 2644 if (!NoexceptExpr.isInvalid()) 2645 NoexceptExpr = Actions.ActOnBooleanCondition(getCurScope(), KeywordLoc, 2646 NoexceptExpr.get()); 2647 T.consumeClose(); 2648 NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation()); 2649 } else { 2650 // There is no argument. 2651 NoexceptType = EST_BasicNoexcept; 2652 NoexceptRange = SourceRange(KeywordLoc, KeywordLoc); 2653 } 2654 2655 if (Result == EST_None) { 2656 SpecificationRange = NoexceptRange; 2657 Result = NoexceptType; 2658 2659 // If there's a dynamic specification after a noexcept specification, 2660 // parse that and ignore the results. 2661 if (Tok.is(tok::kw_throw)) { 2662 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2663 ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions, 2664 DynamicExceptionRanges); 2665 } 2666 } else { 2667 Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification); 2668 } 2669 2670 return Result; 2671 } 2672 2673 /// ParseDynamicExceptionSpecification - Parse a C++ 2674 /// dynamic-exception-specification (C++ [except.spec]). 2675 /// 2676 /// dynamic-exception-specification: 2677 /// 'throw' '(' type-id-list [opt] ')' 2678 /// [MS] 'throw' '(' '...' ')' 2679 /// 2680 /// type-id-list: 2681 /// type-id ... [opt] 2682 /// type-id-list ',' type-id ... [opt] 2683 /// 2684 ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification( 2685 SourceRange &SpecificationRange, 2686 SmallVectorImpl<ParsedType> &Exceptions, 2687 SmallVectorImpl<SourceRange> &Ranges) { 2688 assert(Tok.is(tok::kw_throw) && "expected throw"); 2689 2690 SpecificationRange.setBegin(ConsumeToken()); 2691 BalancedDelimiterTracker T(*this, tok::l_paren); 2692 if (T.consumeOpen()) { 2693 Diag(Tok, diag::err_expected_lparen_after) << "throw"; 2694 SpecificationRange.setEnd(SpecificationRange.getBegin()); 2695 return EST_DynamicNone; 2696 } 2697 2698 // Parse throw(...), a Microsoft extension that means "this function 2699 // can throw anything". 2700 if (Tok.is(tok::ellipsis)) { 2701 SourceLocation EllipsisLoc = ConsumeToken(); 2702 if (!getLangOpts().MicrosoftExt) 2703 Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); 2704 T.consumeClose(); 2705 SpecificationRange.setEnd(T.getCloseLocation()); 2706 return EST_MSAny; 2707 } 2708 2709 // Parse the sequence of type-ids. 2710 SourceRange Range; 2711 while (Tok.isNot(tok::r_paren)) { 2712 TypeResult Res(ParseTypeName(&Range)); 2713 2714 if (Tok.is(tok::ellipsis)) { 2715 // C++0x [temp.variadic]p5: 2716 // - In a dynamic-exception-specification (15.4); the pattern is a 2717 // type-id. 2718 SourceLocation Ellipsis = ConsumeToken(); 2719 Range.setEnd(Ellipsis); 2720 if (!Res.isInvalid()) 2721 Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis); 2722 } 2723 2724 if (!Res.isInvalid()) { 2725 Exceptions.push_back(Res.get()); 2726 Ranges.push_back(Range); 2727 } 2728 2729 if (Tok.is(tok::comma)) 2730 ConsumeToken(); 2731 else 2732 break; 2733 } 2734 2735 T.consumeClose(); 2736 SpecificationRange.setEnd(T.getCloseLocation()); 2737 return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic; 2738 } 2739 2740 /// ParseTrailingReturnType - Parse a trailing return type on a new-style 2741 /// function declaration. 2742 TypeResult Parser::ParseTrailingReturnType(SourceRange &Range) { 2743 assert(Tok.is(tok::arrow) && "expected arrow"); 2744 2745 ConsumeToken(); 2746 2747 return ParseTypeName(&Range, Declarator::TrailingReturnContext); 2748 } 2749 2750 /// \brief We have just started parsing the definition of a new class, 2751 /// so push that class onto our stack of classes that is currently 2752 /// being parsed. 2753 Sema::ParsingClassState 2754 Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass) { 2755 assert((NonNestedClass || !ClassStack.empty()) && 2756 "Nested class without outer class"); 2757 ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass)); 2758 return Actions.PushParsingClass(); 2759 } 2760 2761 /// \brief Deallocate the given parsed class and all of its nested 2762 /// classes. 2763 void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { 2764 for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I) 2765 delete Class->LateParsedDeclarations[I]; 2766 delete Class; 2767 } 2768 2769 /// \brief Pop the top class of the stack of classes that are 2770 /// currently being parsed. 2771 /// 2772 /// This routine should be called when we have finished parsing the 2773 /// definition of a class, but have not yet popped the Scope 2774 /// associated with the class's definition. 2775 /// 2776 /// \returns true if the class we've popped is a top-level class, 2777 /// false otherwise. 2778 void Parser::PopParsingClass(Sema::ParsingClassState state) { 2779 assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); 2780 2781 Actions.PopParsingClass(state); 2782 2783 ParsingClass *Victim = ClassStack.top(); 2784 ClassStack.pop(); 2785 if (Victim->TopLevelClass) { 2786 // Deallocate all of the nested classes of this class, 2787 // recursively: we don't need to keep any of this information. 2788 DeallocateParsedClasses(Victim); 2789 return; 2790 } 2791 assert(!ClassStack.empty() && "Missing top-level class?"); 2792 2793 if (Victim->LateParsedDeclarations.empty()) { 2794 // The victim is a nested class, but we will not need to perform 2795 // any processing after the definition of this class since it has 2796 // no members whose handling was delayed. Therefore, we can just 2797 // remove this nested class. 2798 DeallocateParsedClasses(Victim); 2799 return; 2800 } 2801 2802 // This nested class has some members that will need to be processed 2803 // after the top-level class is completely defined. Therefore, add 2804 // it to the list of nested classes within its parent. 2805 assert(getCurScope()->isClassScope() && "Nested class outside of class scope?"); 2806 ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim)); 2807 Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope(); 2808 } 2809 2810 /// \brief Try to parse an 'identifier' which appears within an attribute-token. 2811 /// 2812 /// \return the parsed identifier on success, and 0 if the next token is not an 2813 /// attribute-token. 2814 /// 2815 /// C++11 [dcl.attr.grammar]p3: 2816 /// If a keyword or an alternative token that satisfies the syntactic 2817 /// requirements of an identifier is contained in an attribute-token, 2818 /// it is considered an identifier. 2819 IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) { 2820 switch (Tok.getKind()) { 2821 default: 2822 // Identifiers and keywords have identifier info attached. 2823 if (IdentifierInfo *II = Tok.getIdentifierInfo()) { 2824 Loc = ConsumeToken(); 2825 return II; 2826 } 2827 return 0; 2828 2829 case tok::ampamp: // 'and' 2830 case tok::pipe: // 'bitor' 2831 case tok::pipepipe: // 'or' 2832 case tok::caret: // 'xor' 2833 case tok::tilde: // 'compl' 2834 case tok::amp: // 'bitand' 2835 case tok::ampequal: // 'and_eq' 2836 case tok::pipeequal: // 'or_eq' 2837 case tok::caretequal: // 'xor_eq' 2838 case tok::exclaim: // 'not' 2839 case tok::exclaimequal: // 'not_eq' 2840 // Alternative tokens do not have identifier info, but their spelling 2841 // starts with an alphabetical character. 2842 llvm::SmallString<8> SpellingBuf; 2843 StringRef Spelling = PP.getSpelling(Tok.getLocation(), SpellingBuf); 2844 if (std::isalpha(Spelling[0])) { 2845 Loc = ConsumeToken(); 2846 return &PP.getIdentifierTable().get(Spelling.data()); 2847 } 2848 return 0; 2849 } 2850 } 2851 2852 /// ParseCXX11AttributeSpecifier - Parse a C++11 attribute-specifier. Currently 2853 /// only parses standard attributes. 2854 /// 2855 /// [C++11] attribute-specifier: 2856 /// '[' '[' attribute-list ']' ']' 2857 /// alignment-specifier 2858 /// 2859 /// [C++11] attribute-list: 2860 /// attribute[opt] 2861 /// attribute-list ',' attribute[opt] 2862 /// attribute '...' 2863 /// attribute-list ',' attribute '...' 2864 /// 2865 /// [C++11] attribute: 2866 /// attribute-token attribute-argument-clause[opt] 2867 /// 2868 /// [C++11] attribute-token: 2869 /// identifier 2870 /// attribute-scoped-token 2871 /// 2872 /// [C++11] attribute-scoped-token: 2873 /// attribute-namespace '::' identifier 2874 /// 2875 /// [C++11] attribute-namespace: 2876 /// identifier 2877 /// 2878 /// [C++11] attribute-argument-clause: 2879 /// '(' balanced-token-seq ')' 2880 /// 2881 /// [C++11] balanced-token-seq: 2882 /// balanced-token 2883 /// balanced-token-seq balanced-token 2884 /// 2885 /// [C++11] balanced-token: 2886 /// '(' balanced-token-seq ')' 2887 /// '[' balanced-token-seq ']' 2888 /// '{' balanced-token-seq '}' 2889 /// any token but '(', ')', '[', ']', '{', or '}' 2890 void Parser::ParseCXX11AttributeSpecifier(ParsedAttributes &attrs, 2891 SourceLocation *endLoc) { 2892 if (Tok.is(tok::kw_alignas)) { 2893 Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas); 2894 ParseAlignmentSpecifier(attrs, endLoc); 2895 return; 2896 } 2897 2898 assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) 2899 && "Not a C++11 attribute list"); 2900 2901 Diag(Tok.getLocation(), diag::warn_cxx98_compat_attribute); 2902 2903 ConsumeBracket(); 2904 ConsumeBracket(); 2905 2906 while (Tok.isNot(tok::r_square)) { 2907 // attribute not present 2908 if (Tok.is(tok::comma)) { 2909 ConsumeToken(); 2910 continue; 2911 } 2912 2913 SourceLocation ScopeLoc, AttrLoc; 2914 IdentifierInfo *ScopeName = 0, *AttrName = 0; 2915 2916 AttrName = TryParseCXX11AttributeIdentifier(AttrLoc); 2917 if (!AttrName) 2918 // Break out to the "expected ']'" diagnostic. 2919 break; 2920 2921 // scoped attribute 2922 if (Tok.is(tok::coloncolon)) { 2923 ConsumeToken(); 2924 2925 ScopeName = AttrName; 2926 ScopeLoc = AttrLoc; 2927 2928 AttrName = TryParseCXX11AttributeIdentifier(AttrLoc); 2929 if (!AttrName) { 2930 Diag(Tok.getLocation(), diag::err_expected_ident); 2931 SkipUntil(tok::r_square, tok::comma, true, true); 2932 continue; 2933 } 2934 } 2935 2936 bool AttrParsed = false; 2937 // No scoped names are supported; ideally we could put all non-standard 2938 // attributes into namespaces. 2939 if (!ScopeName) { 2940 switch (AttributeList::getKind(AttrName)) { 2941 // No arguments 2942 case AttributeList::AT_carries_dependency: 2943 case AttributeList::AT_noreturn: { 2944 if (Tok.is(tok::l_paren)) { 2945 Diag(Tok.getLocation(), diag::err_cxx11_attribute_forbids_arguments) 2946 << AttrName->getName(); 2947 break; 2948 } 2949 2950 attrs.addNew(AttrName, AttrLoc, 0, AttrLoc, 0, 2951 SourceLocation(), 0, 0, false, true); 2952 AttrParsed = true; 2953 break; 2954 } 2955 2956 // Silence warnings 2957 default: break; 2958 } 2959 } 2960 2961 // Skip the entire parameter clause, if any 2962 if (!AttrParsed && Tok.is(tok::l_paren)) { 2963 ConsumeParen(); 2964 // SkipUntil maintains the balancedness of tokens. 2965 SkipUntil(tok::r_paren, false); 2966 } 2967 2968 if (Tok.is(tok::ellipsis)) { 2969 if (AttrParsed) 2970 Diag(Tok, diag::err_cxx11_attribute_forbids_ellipsis) 2971 << AttrName->getName(); 2972 ConsumeToken(); 2973 } 2974 } 2975 2976 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2977 SkipUntil(tok::r_square, false); 2978 if (endLoc) 2979 *endLoc = Tok.getLocation(); 2980 if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) 2981 SkipUntil(tok::r_square, false); 2982 } 2983 2984 /// ParseCXX11Attributes - Parse a C++0x attribute-specifier-seq. 2985 /// 2986 /// attribute-specifier-seq: 2987 /// attribute-specifier-seq[opt] attribute-specifier 2988 void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs, 2989 SourceLocation *endLoc) { 2990 SourceLocation StartLoc = Tok.getLocation(), Loc; 2991 if (!endLoc) 2992 endLoc = &Loc; 2993 2994 do { 2995 ParseCXX11AttributeSpecifier(attrs, endLoc); 2996 } while (isCXX11AttributeSpecifier()); 2997 2998 attrs.Range = SourceRange(StartLoc, *endLoc); 2999 } 3000 3001 /// ParseMicrosoftAttributes - Parse a Microsoft attribute [Attr] 3002 /// 3003 /// [MS] ms-attribute: 3004 /// '[' token-seq ']' 3005 /// 3006 /// [MS] ms-attribute-seq: 3007 /// ms-attribute[opt] 3008 /// ms-attribute ms-attribute-seq 3009 void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs, 3010 SourceLocation *endLoc) { 3011 assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list"); 3012 3013 while (Tok.is(tok::l_square)) { 3014 // FIXME: If this is actually a C++11 attribute, parse it as one. 3015 ConsumeBracket(); 3016 SkipUntil(tok::r_square, true, true); 3017 if (endLoc) *endLoc = Tok.getLocation(); 3018 ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); 3019 } 3020 } 3021 3022 void Parser::ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType, 3023 AccessSpecifier& CurAS) { 3024 IfExistsCondition Result; 3025 if (ParseMicrosoftIfExistsCondition(Result)) 3026 return; 3027 3028 BalancedDelimiterTracker Braces(*this, tok::l_brace); 3029 if (Braces.consumeOpen()) { 3030 Diag(Tok, diag::err_expected_lbrace); 3031 return; 3032 } 3033 3034 switch (Result.Behavior) { 3035 case IEB_Parse: 3036 // Parse the declarations below. 3037 break; 3038 3039 case IEB_Dependent: 3040 Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists) 3041 << Result.IsIfExists; 3042 // Fall through to skip. 3043 3044 case IEB_Skip: 3045 Braces.skipToEnd(); 3046 return; 3047 } 3048 3049 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 3050 // __if_exists, __if_not_exists can nest. 3051 if ((Tok.is(tok::kw___if_exists) || Tok.is(tok::kw___if_not_exists))) { 3052 ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); 3053 continue; 3054 } 3055 3056 // Check for extraneous top-level semicolon. 3057 if (Tok.is(tok::semi)) { 3058 Diag(Tok, diag::ext_extra_struct_semi) 3059 << DeclSpec::getSpecifierName((DeclSpec::TST)TagType) 3060 << FixItHint::CreateRemoval(Tok.getLocation()); 3061 ConsumeToken(); 3062 continue; 3063 } 3064 3065 AccessSpecifier AS = getAccessSpecifierIfPresent(); 3066 if (AS != AS_none) { 3067 // Current token is a C++ access specifier. 3068 CurAS = AS; 3069 SourceLocation ASLoc = Tok.getLocation(); 3070 ConsumeToken(); 3071 if (Tok.is(tok::colon)) 3072 Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation()); 3073 else 3074 Diag(Tok, diag::err_expected_colon); 3075 ConsumeToken(); 3076 continue; 3077 } 3078 3079 // Parse all the comma separated declarators. 3080 ParseCXXClassMemberDeclaration(CurAS, 0); 3081 } 3082 3083 Braces.consumeClose(); 3084 } 3085