ParseDeclCXX.cpp revision 3f9a8a60614b763785d54ad08821745d03a4af70
1//===--- ParseDeclCXX.cpp - C++ Declaration Parsing -----------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the C++ Declaration portions of the Parser interfaces. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Basic/OperatorKinds.h" 15#include "clang/Parse/Parser.h" 16#include "clang/Parse/ParseDiagnostic.h" 17#include "clang/Parse/DeclSpec.h" 18#include "clang/Parse/Scope.h" 19#include "ExtensionRAIIObject.h" 20using namespace clang; 21 22/// ParseNamespace - We know that the current token is a namespace keyword. This 23/// may either be a top level namespace or a block-level namespace alias. 24/// 25/// namespace-definition: [C++ 7.3: basic.namespace] 26/// named-namespace-definition 27/// unnamed-namespace-definition 28/// 29/// unnamed-namespace-definition: 30/// 'namespace' attributes[opt] '{' namespace-body '}' 31/// 32/// named-namespace-definition: 33/// original-namespace-definition 34/// extension-namespace-definition 35/// 36/// original-namespace-definition: 37/// 'namespace' identifier attributes[opt] '{' namespace-body '}' 38/// 39/// extension-namespace-definition: 40/// 'namespace' original-namespace-name '{' namespace-body '}' 41/// 42/// namespace-alias-definition: [C++ 7.3.2: namespace.alias] 43/// 'namespace' identifier '=' qualified-namespace-specifier ';' 44/// 45Parser::DeclPtrTy Parser::ParseNamespace(unsigned Context, 46 SourceLocation &DeclEnd) { 47 assert(Tok.is(tok::kw_namespace) && "Not a namespace!"); 48 SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'. 49 50 SourceLocation IdentLoc; 51 IdentifierInfo *Ident = 0; 52 53 Token attrTok; 54 55 if (Tok.is(tok::identifier)) { 56 Ident = Tok.getIdentifierInfo(); 57 IdentLoc = ConsumeToken(); // eat the identifier. 58 } 59 60 // Read label attributes, if present. 61 Action::AttrTy *AttrList = 0; 62 if (Tok.is(tok::kw___attribute)) { 63 attrTok = Tok; 64 65 // FIXME: save these somewhere. 66 AttrList = ParseAttributes(); 67 } 68 69 if (Tok.is(tok::equal)) { 70 if (AttrList) 71 Diag(attrTok, diag::err_unexpected_namespace_attributes_alias); 72 73 return ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd); 74 } 75 76 if (Tok.isNot(tok::l_brace)) { 77 Diag(Tok, Ident ? diag::err_expected_lbrace : 78 diag::err_expected_ident_lbrace); 79 return DeclPtrTy(); 80 } 81 82 SourceLocation LBrace = ConsumeBrace(); 83 84 // Enter a scope for the namespace. 85 ParseScope NamespaceScope(this, Scope::DeclScope); 86 87 DeclPtrTy NamespcDecl = 88 Actions.ActOnStartNamespaceDef(CurScope, IdentLoc, Ident, LBrace); 89 90 PrettyStackTraceActionsDecl CrashInfo(NamespcDecl, NamespaceLoc, Actions, 91 PP.getSourceManager(), 92 "parsing namespace"); 93 94 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) 95 ParseExternalDeclaration(); 96 97 // Leave the namespace scope. 98 NamespaceScope.Exit(); 99 100 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBrace); 101 Actions.ActOnFinishNamespaceDef(NamespcDecl, RBraceLoc); 102 103 DeclEnd = RBraceLoc; 104 return NamespcDecl; 105} 106 107/// ParseNamespaceAlias - Parse the part after the '=' in a namespace 108/// alias definition. 109/// 110Parser::DeclPtrTy Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc, 111 SourceLocation AliasLoc, 112 IdentifierInfo *Alias, 113 SourceLocation &DeclEnd) { 114 assert(Tok.is(tok::equal) && "Not equal token"); 115 116 ConsumeToken(); // eat the '='. 117 118 CXXScopeSpec SS; 119 // Parse (optional) nested-name-specifier. 120 ParseOptionalCXXScopeSpecifier(SS); 121 122 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 123 Diag(Tok, diag::err_expected_namespace_name); 124 // Skip to end of the definition and eat the ';'. 125 SkipUntil(tok::semi); 126 return DeclPtrTy(); 127 } 128 129 // Parse identifier. 130 IdentifierInfo *Ident = Tok.getIdentifierInfo(); 131 SourceLocation IdentLoc = ConsumeToken(); 132 133 // Eat the ';'. 134 DeclEnd = Tok.getLocation(); 135 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name, 136 "", tok::semi); 137 138 return Actions.ActOnNamespaceAliasDef(CurScope, NamespaceLoc, AliasLoc, Alias, 139 SS, IdentLoc, Ident); 140} 141 142/// ParseLinkage - We know that the current token is a string_literal 143/// and just before that, that extern was seen. 144/// 145/// linkage-specification: [C++ 7.5p2: dcl.link] 146/// 'extern' string-literal '{' declaration-seq[opt] '}' 147/// 'extern' string-literal declaration 148/// 149Parser::DeclPtrTy Parser::ParseLinkage(unsigned Context) { 150 assert(Tok.is(tok::string_literal) && "Not a string literal!"); 151 llvm::SmallVector<char, 8> LangBuffer; 152 // LangBuffer is guaranteed to be big enough. 153 LangBuffer.resize(Tok.getLength()); 154 const char *LangBufPtr = &LangBuffer[0]; 155 unsigned StrSize = PP.getSpelling(Tok, LangBufPtr); 156 157 SourceLocation Loc = ConsumeStringToken(); 158 159 ParseScope LinkageScope(this, Scope::DeclScope); 160 DeclPtrTy LinkageSpec 161 = Actions.ActOnStartLinkageSpecification(CurScope, 162 /*FIXME: */SourceLocation(), 163 Loc, LangBufPtr, StrSize, 164 Tok.is(tok::l_brace)? Tok.getLocation() 165 : SourceLocation()); 166 167 if (Tok.isNot(tok::l_brace)) { 168 ParseDeclarationOrFunctionDefinition(); 169 return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, 170 SourceLocation()); 171 } 172 173 SourceLocation LBrace = ConsumeBrace(); 174 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 175 ParseExternalDeclaration(); 176 } 177 178 SourceLocation RBrace = MatchRHSPunctuation(tok::r_brace, LBrace); 179 return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, RBrace); 180} 181 182/// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or 183/// using-directive. Assumes that current token is 'using'. 184Parser::DeclPtrTy Parser::ParseUsingDirectiveOrDeclaration(unsigned Context, 185 SourceLocation &DeclEnd) { 186 assert(Tok.is(tok::kw_using) && "Not using token"); 187 188 // Eat 'using'. 189 SourceLocation UsingLoc = ConsumeToken(); 190 191 if (Tok.is(tok::kw_namespace)) 192 // Next token after 'using' is 'namespace' so it must be using-directive 193 return ParseUsingDirective(Context, UsingLoc, DeclEnd); 194 195 // Otherwise, it must be using-declaration. 196 return ParseUsingDeclaration(Context, UsingLoc, DeclEnd); 197} 198 199/// ParseUsingDirective - Parse C++ using-directive, assumes 200/// that current token is 'namespace' and 'using' was already parsed. 201/// 202/// using-directive: [C++ 7.3.p4: namespace.udir] 203/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 204/// namespace-name ; 205/// [GNU] using-directive: 206/// 'using' 'namespace' ::[opt] nested-name-specifier[opt] 207/// namespace-name attributes[opt] ; 208/// 209Parser::DeclPtrTy Parser::ParseUsingDirective(unsigned Context, 210 SourceLocation UsingLoc, 211 SourceLocation &DeclEnd) { 212 assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token"); 213 214 // Eat 'namespace'. 215 SourceLocation NamespcLoc = ConsumeToken(); 216 217 CXXScopeSpec SS; 218 // Parse (optional) nested-name-specifier. 219 ParseOptionalCXXScopeSpecifier(SS); 220 221 AttributeList *AttrList = 0; 222 IdentifierInfo *NamespcName = 0; 223 SourceLocation IdentLoc = SourceLocation(); 224 225 // Parse namespace-name. 226 if (SS.isInvalid() || Tok.isNot(tok::identifier)) { 227 Diag(Tok, diag::err_expected_namespace_name); 228 // If there was invalid namespace name, skip to end of decl, and eat ';'. 229 SkipUntil(tok::semi); 230 // FIXME: Are there cases, when we would like to call ActOnUsingDirective? 231 return DeclPtrTy(); 232 } 233 234 // Parse identifier. 235 NamespcName = Tok.getIdentifierInfo(); 236 IdentLoc = ConsumeToken(); 237 238 // Parse (optional) attributes (most likely GNU strong-using extension). 239 if (Tok.is(tok::kw___attribute)) 240 AttrList = ParseAttributes(); 241 242 // Eat ';'. 243 DeclEnd = Tok.getLocation(); 244 ExpectAndConsume(tok::semi, 245 AttrList ? diag::err_expected_semi_after_attribute_list : 246 diag::err_expected_semi_after_namespace_name, "", tok::semi); 247 248 return Actions.ActOnUsingDirective(CurScope, UsingLoc, NamespcLoc, SS, 249 IdentLoc, NamespcName, AttrList); 250} 251 252/// ParseUsingDeclaration - Parse C++ using-declaration. Assumes that 253/// 'using' was already seen. 254/// 255/// using-declaration: [C++ 7.3.p3: namespace.udecl] 256/// 'using' 'typename'[opt] ::[opt] nested-name-specifier 257/// unqualified-id 258/// 'using' :: unqualified-id 259/// 260Parser::DeclPtrTy Parser::ParseUsingDeclaration(unsigned Context, 261 SourceLocation UsingLoc, 262 SourceLocation &DeclEnd) { 263 CXXScopeSpec SS; 264 bool IsTypeName; 265 266 // Ignore optional 'typename'. 267 if (Tok.is(tok::kw_typename)) { 268 ConsumeToken(); 269 IsTypeName = true; 270 } 271 else 272 IsTypeName = false; 273 274 // Parse nested-name-specifier. 275 ParseOptionalCXXScopeSpecifier(SS); 276 277 AttributeList *AttrList = 0; 278 279 // Check nested-name specifier. 280 if (SS.isInvalid()) { 281 SkipUntil(tok::semi); 282 return DeclPtrTy(); 283 } 284 if (Tok.is(tok::annot_template_id)) { 285 Diag(Tok, diag::err_unexpected_template_spec_in_using); 286 SkipUntil(tok::semi); 287 return DeclPtrTy(); 288 } 289 290 IdentifierInfo *TargetName = 0; 291 OverloadedOperatorKind Op = OO_None; 292 SourceLocation IdentLoc; 293 294 if (Tok.is(tok::kw_operator)) { 295 IdentLoc = Tok.getLocation(); 296 297 Op = TryParseOperatorFunctionId(); 298 if (!Op) { 299 // If there was an invalid operator, skip to end of decl, and eat ';'. 300 SkipUntil(tok::semi); 301 return DeclPtrTy(); 302 } 303 } else if (Tok.is(tok::identifier)) { 304 // Parse identifier. 305 TargetName = Tok.getIdentifierInfo(); 306 IdentLoc = ConsumeToken(); 307 } else { 308 // FIXME: Use a better diagnostic here. 309 Diag(Tok, diag::err_expected_ident_in_using); 310 311 // If there was invalid identifier, skip to end of decl, and eat ';'. 312 SkipUntil(tok::semi); 313 return DeclPtrTy(); 314 } 315 316 // Parse (optional) attributes (most likely GNU strong-using extension). 317 if (Tok.is(tok::kw___attribute)) 318 AttrList = ParseAttributes(); 319 320 // Eat ';'. 321 DeclEnd = Tok.getLocation(); 322 ExpectAndConsume(tok::semi, diag::err_expected_semi_after, 323 AttrList ? "attributes list" : "namespace name", tok::semi); 324 325 return Actions.ActOnUsingDeclaration(CurScope, UsingLoc, SS, 326 IdentLoc, TargetName, Op, 327 AttrList, IsTypeName); 328} 329 330/// ParseStaticAssertDeclaration - Parse C++0x static_assert-declaratoion. 331/// 332/// static_assert-declaration: 333/// static_assert ( constant-expression , string-literal ) ; 334/// 335Parser::DeclPtrTy Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){ 336 assert(Tok.is(tok::kw_static_assert) && "Not a static_assert declaration"); 337 SourceLocation StaticAssertLoc = ConsumeToken(); 338 339 if (Tok.isNot(tok::l_paren)) { 340 Diag(Tok, diag::err_expected_lparen); 341 return DeclPtrTy(); 342 } 343 344 SourceLocation LParenLoc = ConsumeParen(); 345 346 OwningExprResult AssertExpr(ParseConstantExpression()); 347 if (AssertExpr.isInvalid()) { 348 SkipUntil(tok::semi); 349 return DeclPtrTy(); 350 } 351 352 if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi)) 353 return DeclPtrTy(); 354 355 if (Tok.isNot(tok::string_literal)) { 356 Diag(Tok, diag::err_expected_string_literal); 357 SkipUntil(tok::semi); 358 return DeclPtrTy(); 359 } 360 361 OwningExprResult AssertMessage(ParseStringLiteralExpression()); 362 if (AssertMessage.isInvalid()) 363 return DeclPtrTy(); 364 365 MatchRHSPunctuation(tok::r_paren, LParenLoc); 366 367 DeclEnd = Tok.getLocation(); 368 ExpectAndConsume(tok::semi, diag::err_expected_semi_after_static_assert); 369 370 return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, move(AssertExpr), 371 move(AssertMessage)); 372} 373 374/// ParseDecltypeSpecifier - Parse a C++0x decltype specifier. 375/// 376/// 'decltype' ( expression ) 377/// 378void Parser::ParseDecltypeSpecifier(DeclSpec &DS) { 379 assert(Tok.is(tok::kw_decltype) && "Not a decltype specifier"); 380 381 SourceLocation StartLoc = ConsumeToken(); 382 SourceLocation LParenLoc = Tok.getLocation(); 383 384 if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, 385 "decltype")) { 386 SkipUntil(tok::r_paren); 387 return; 388 } 389 390 // Parse the expression 391 392 // C++0x [dcl.type.simple]p4: 393 // The operand of the decltype specifier is an unevaluated operand. 394 EnterExpressionEvaluationContext Unevaluated(Actions, 395 Action::Unevaluated); 396 OwningExprResult Result = ParseExpression(); 397 if (Result.isInvalid()) { 398 SkipUntil(tok::r_paren); 399 return; 400 } 401 402 // Match the ')' 403 SourceLocation RParenLoc; 404 if (Tok.is(tok::r_paren)) 405 RParenLoc = ConsumeParen(); 406 else 407 MatchRHSPunctuation(tok::r_paren, LParenLoc); 408 409 if (RParenLoc.isInvalid()) 410 return; 411 412 const char *PrevSpec = 0; 413 unsigned DiagID; 414 // Check for duplicate type specifiers (e.g. "int decltype(a)"). 415 if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec, 416 DiagID, Result.release())) 417 Diag(StartLoc, DiagID) << PrevSpec; 418} 419 420/// ParseClassName - Parse a C++ class-name, which names a class. Note 421/// that we only check that the result names a type; semantic analysis 422/// will need to verify that the type names a class. The result is 423/// either a type or NULL, depending on whether a type name was 424/// found. 425/// 426/// class-name: [C++ 9.1] 427/// identifier 428/// simple-template-id 429/// 430Parser::TypeResult Parser::ParseClassName(SourceLocation &EndLocation, 431 const CXXScopeSpec *SS, 432 bool DestrExpected) { 433 // Check whether we have a template-id that names a type. 434 if (Tok.is(tok::annot_template_id)) { 435 TemplateIdAnnotation *TemplateId 436 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 437 if (TemplateId->Kind == TNK_Type_template) { 438 AnnotateTemplateIdTokenAsType(SS); 439 440 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 441 TypeTy *Type = Tok.getAnnotationValue(); 442 EndLocation = Tok.getAnnotationEndLoc(); 443 ConsumeToken(); 444 445 if (Type) 446 return Type; 447 return true; 448 } 449 450 // Fall through to produce an error below. 451 } 452 453 if (Tok.isNot(tok::identifier)) { 454 Diag(Tok, diag::err_expected_class_name); 455 return true; 456 } 457 458 // We have an identifier; check whether it is actually a type. 459 TypeTy *Type = Actions.getTypeName(*Tok.getIdentifierInfo(), 460 Tok.getLocation(), CurScope, SS); 461 if (!Type) { 462 Diag(Tok, DestrExpected ? diag::err_destructor_class_name 463 : diag::err_expected_class_name); 464 return true; 465 } 466 467 // Consume the identifier. 468 EndLocation = ConsumeToken(); 469 return Type; 470} 471 472/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or 473/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which 474/// until we reach the start of a definition or see a token that 475/// cannot start a definition. 476/// 477/// class-specifier: [C++ class] 478/// class-head '{' member-specification[opt] '}' 479/// class-head '{' member-specification[opt] '}' attributes[opt] 480/// class-head: 481/// class-key identifier[opt] base-clause[opt] 482/// class-key nested-name-specifier identifier base-clause[opt] 483/// class-key nested-name-specifier[opt] simple-template-id 484/// base-clause[opt] 485/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] 486/// [GNU] class-key attributes[opt] nested-name-specifier 487/// identifier base-clause[opt] 488/// [GNU] class-key attributes[opt] nested-name-specifier[opt] 489/// simple-template-id base-clause[opt] 490/// class-key: 491/// 'class' 492/// 'struct' 493/// 'union' 494/// 495/// elaborated-type-specifier: [C++ dcl.type.elab] 496/// class-key ::[opt] nested-name-specifier[opt] identifier 497/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] 498/// simple-template-id 499/// 500/// Note that the C++ class-specifier and elaborated-type-specifier, 501/// together, subsume the C99 struct-or-union-specifier: 502/// 503/// struct-or-union-specifier: [C99 6.7.2.1] 504/// struct-or-union identifier[opt] '{' struct-contents '}' 505/// struct-or-union identifier 506/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents 507/// '}' attributes[opt] 508/// [GNU] struct-or-union attributes[opt] identifier 509/// struct-or-union: 510/// 'struct' 511/// 'union' 512void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, 513 SourceLocation StartLoc, DeclSpec &DS, 514 const ParsedTemplateInfo &TemplateInfo, 515 AccessSpecifier AS) { 516 DeclSpec::TST TagType; 517 if (TagTokKind == tok::kw_struct) 518 TagType = DeclSpec::TST_struct; 519 else if (TagTokKind == tok::kw_class) 520 TagType = DeclSpec::TST_class; 521 else { 522 assert(TagTokKind == tok::kw_union && "Not a class specifier"); 523 TagType = DeclSpec::TST_union; 524 } 525 526 AttributeList *Attr = 0; 527 // If attributes exist after tag, parse them. 528 if (Tok.is(tok::kw___attribute)) 529 Attr = ParseAttributes(); 530 531 // If declspecs exist after tag, parse them. 532 if (Tok.is(tok::kw___declspec)) 533 Attr = ParseMicrosoftDeclSpec(Attr); 534 535 // Parse the (optional) nested-name-specifier. 536 CXXScopeSpec SS; 537 if (getLang().CPlusPlus && ParseOptionalCXXScopeSpecifier(SS)) 538 if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) 539 Diag(Tok, diag::err_expected_ident); 540 541 // Parse the (optional) class name or simple-template-id. 542 IdentifierInfo *Name = 0; 543 SourceLocation NameLoc; 544 TemplateIdAnnotation *TemplateId = 0; 545 if (Tok.is(tok::identifier)) { 546 Name = Tok.getIdentifierInfo(); 547 NameLoc = ConsumeToken(); 548 } else if (Tok.is(tok::annot_template_id)) { 549 TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 550 NameLoc = ConsumeToken(); 551 552 if (TemplateId->Kind != TNK_Type_template) { 553 // The template-name in the simple-template-id refers to 554 // something other than a class template. Give an appropriate 555 // error message and skip to the ';'. 556 SourceRange Range(NameLoc); 557 if (SS.isNotEmpty()) 558 Range.setBegin(SS.getBeginLoc()); 559 560 Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) 561 << Name << static_cast<int>(TemplateId->Kind) << Range; 562 563 DS.SetTypeSpecError(); 564 SkipUntil(tok::semi, false, true); 565 TemplateId->Destroy(); 566 return; 567 } 568 } 569 570 // There are four options here. If we have 'struct foo;', then this 571 // is either a forward declaration or a friend declaration, which 572 // have to be treated differently. If we have 'struct foo {...' or 573 // 'struct foo :...' then this is a definition. Otherwise we have 574 // something like 'struct foo xyz', a reference. 575 Action::TagUseKind TUK; 576 if (Tok.is(tok::l_brace) || (getLang().CPlusPlus && Tok.is(tok::colon))) 577 TUK = Action::TUK_Definition; 578 else if (Tok.is(tok::semi)) 579 TUK = DS.isFriendSpecified() ? Action::TUK_Friend : Action::TUK_Declaration; 580 else 581 TUK = Action::TUK_Reference; 582 583 if (!Name && !TemplateId && TUK != Action::TUK_Definition) { 584 // We have a declaration or reference to an anonymous class. 585 Diag(StartLoc, diag::err_anon_type_definition) 586 << DeclSpec::getSpecifierName(TagType); 587 588 // Skip the rest of this declarator, up until the comma or semicolon. 589 SkipUntil(tok::comma, true); 590 591 if (TemplateId) 592 TemplateId->Destroy(); 593 return; 594 } 595 596 // Create the tag portion of the class or class template. 597 Action::DeclResult TagOrTempResult; 598 TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; 599 600 // FIXME: When TUK == TUK_Reference and we have a template-id, we need 601 // to turn that template-id into a type. 602 603 bool Owned = false; 604 if (TemplateId && TUK != Action::TUK_Reference && TUK != Action::TUK_Friend) { 605 // Explicit specialization, class template partial specialization, 606 // or explicit instantiation. 607 ASTTemplateArgsPtr TemplateArgsPtr(Actions, 608 TemplateId->getTemplateArgs(), 609 TemplateId->getTemplateArgIsType(), 610 TemplateId->NumArgs); 611 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 612 TUK == Action::TUK_Declaration) { 613 // This is an explicit instantiation of a class template. 614 TagOrTempResult 615 = Actions.ActOnExplicitInstantiation(CurScope, 616 TemplateInfo.TemplateLoc, 617 TagType, 618 StartLoc, 619 SS, 620 TemplateTy::make(TemplateId->Template), 621 TemplateId->TemplateNameLoc, 622 TemplateId->LAngleLoc, 623 TemplateArgsPtr, 624 TemplateId->getTemplateArgLocations(), 625 TemplateId->RAngleLoc, 626 Attr); 627 } else { 628 // This is an explicit specialization or a class template 629 // partial specialization. 630 TemplateParameterLists FakedParamLists; 631 632 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { 633 // This looks like an explicit instantiation, because we have 634 // something like 635 // 636 // template class Foo<X> 637 // 638 // but it actually has a definition. Most likely, this was 639 // meant to be an explicit specialization, but the user forgot 640 // the '<>' after 'template'. 641 assert(TUK == Action::TUK_Definition && "Expected a definition here"); 642 643 SourceLocation LAngleLoc 644 = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); 645 Diag(TemplateId->TemplateNameLoc, 646 diag::err_explicit_instantiation_with_definition) 647 << SourceRange(TemplateInfo.TemplateLoc) 648 << CodeModificationHint::CreateInsertion(LAngleLoc, "<>"); 649 650 // Create a fake template parameter list that contains only 651 // "template<>", so that we treat this construct as a class 652 // template specialization. 653 FakedParamLists.push_back( 654 Actions.ActOnTemplateParameterList(0, SourceLocation(), 655 TemplateInfo.TemplateLoc, 656 LAngleLoc, 657 0, 0, 658 LAngleLoc)); 659 TemplateParams = &FakedParamLists; 660 } 661 662 // Build the class template specialization. 663 TagOrTempResult 664 = Actions.ActOnClassTemplateSpecialization(CurScope, TagType, TUK, 665 StartLoc, SS, 666 TemplateTy::make(TemplateId->Template), 667 TemplateId->TemplateNameLoc, 668 TemplateId->LAngleLoc, 669 TemplateArgsPtr, 670 TemplateId->getTemplateArgLocations(), 671 TemplateId->RAngleLoc, 672 Attr, 673 Action::MultiTemplateParamsArg(Actions, 674 TemplateParams? &(*TemplateParams)[0] : 0, 675 TemplateParams? TemplateParams->size() : 0)); 676 } 677 TemplateId->Destroy(); 678 } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 679 TUK == Action::TUK_Declaration) { 680 // Explicit instantiation of a member of a class template 681 // specialization, e.g., 682 // 683 // template struct Outer<int>::Inner; 684 // 685 TagOrTempResult 686 = Actions.ActOnExplicitInstantiation(CurScope, 687 TemplateInfo.TemplateLoc, 688 TagType, StartLoc, SS, Name, 689 NameLoc, Attr); 690 } else { 691 if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && 692 TUK == Action::TUK_Definition) { 693 // FIXME: Diagnose this particular error. 694 } 695 696 // Declaration or definition of a class type 697 TagOrTempResult = Actions.ActOnTag(CurScope, TagType, TUK, StartLoc, SS, 698 Name, NameLoc, Attr, AS, 699 Action::MultiTemplateParamsArg(Actions, 700 TemplateParams? &(*TemplateParams)[0] : 0, 701 TemplateParams? TemplateParams->size() : 0), 702 Owned); 703 } 704 705 // Parse the optional base clause (C++ only). 706 if (getLang().CPlusPlus && Tok.is(tok::colon)) 707 ParseBaseClause(TagOrTempResult.get()); 708 709 // If there is a body, parse it and inform the actions module. 710 if (Tok.is(tok::l_brace)) 711 if (getLang().CPlusPlus) 712 ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); 713 else 714 ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); 715 else if (TUK == Action::TUK_Definition) { 716 // FIXME: Complain that we have a base-specifier list but no 717 // definition. 718 Diag(Tok, diag::err_expected_lbrace); 719 } 720 721 if (TagOrTempResult.isInvalid()) { 722 DS.SetTypeSpecError(); 723 return; 724 } 725 726 const char *PrevSpec = 0; 727 unsigned DiagID; 728 if (DS.SetTypeSpecType(TagType, StartLoc, PrevSpec, DiagID, 729 TagOrTempResult.get().getAs<void>(), Owned)) 730 Diag(StartLoc, DiagID) << PrevSpec; 731} 732 733/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. 734/// 735/// base-clause : [C++ class.derived] 736/// ':' base-specifier-list 737/// base-specifier-list: 738/// base-specifier '...'[opt] 739/// base-specifier-list ',' base-specifier '...'[opt] 740void Parser::ParseBaseClause(DeclPtrTy ClassDecl) { 741 assert(Tok.is(tok::colon) && "Not a base clause"); 742 ConsumeToken(); 743 744 // Build up an array of parsed base specifiers. 745 llvm::SmallVector<BaseTy *, 8> BaseInfo; 746 747 while (true) { 748 // Parse a base-specifier. 749 BaseResult Result = ParseBaseSpecifier(ClassDecl); 750 if (Result.isInvalid()) { 751 // Skip the rest of this base specifier, up until the comma or 752 // opening brace. 753 SkipUntil(tok::comma, tok::l_brace, true, true); 754 } else { 755 // Add this to our array of base specifiers. 756 BaseInfo.push_back(Result.get()); 757 } 758 759 // If the next token is a comma, consume it and keep reading 760 // base-specifiers. 761 if (Tok.isNot(tok::comma)) break; 762 763 // Consume the comma. 764 ConsumeToken(); 765 } 766 767 // Attach the base specifiers 768 Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size()); 769} 770 771/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is 772/// one entry in the base class list of a class specifier, for example: 773/// class foo : public bar, virtual private baz { 774/// 'public bar' and 'virtual private baz' are each base-specifiers. 775/// 776/// base-specifier: [C++ class.derived] 777/// ::[opt] nested-name-specifier[opt] class-name 778/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] 779/// class-name 780/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] 781/// class-name 782Parser::BaseResult Parser::ParseBaseSpecifier(DeclPtrTy ClassDecl) { 783 bool IsVirtual = false; 784 SourceLocation StartLoc = Tok.getLocation(); 785 786 // Parse the 'virtual' keyword. 787 if (Tok.is(tok::kw_virtual)) { 788 ConsumeToken(); 789 IsVirtual = true; 790 } 791 792 // Parse an (optional) access specifier. 793 AccessSpecifier Access = getAccessSpecifierIfPresent(); 794 if (Access) 795 ConsumeToken(); 796 797 // Parse the 'virtual' keyword (again!), in case it came after the 798 // access specifier. 799 if (Tok.is(tok::kw_virtual)) { 800 SourceLocation VirtualLoc = ConsumeToken(); 801 if (IsVirtual) { 802 // Complain about duplicate 'virtual' 803 Diag(VirtualLoc, diag::err_dup_virtual) 804 << CodeModificationHint::CreateRemoval(SourceRange(VirtualLoc)); 805 } 806 807 IsVirtual = true; 808 } 809 810 // Parse optional '::' and optional nested-name-specifier. 811 CXXScopeSpec SS; 812 ParseOptionalCXXScopeSpecifier(SS); 813 814 // The location of the base class itself. 815 SourceLocation BaseLoc = Tok.getLocation(); 816 817 // Parse the class-name. 818 SourceLocation EndLocation; 819 TypeResult BaseType = ParseClassName(EndLocation, &SS); 820 if (BaseType.isInvalid()) 821 return true; 822 823 // Find the complete source range for the base-specifier. 824 SourceRange Range(StartLoc, EndLocation); 825 826 // Notify semantic analysis that we have parsed a complete 827 // base-specifier. 828 return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, 829 BaseType.get(), BaseLoc); 830} 831 832/// getAccessSpecifierIfPresent - Determine whether the next token is 833/// a C++ access-specifier. 834/// 835/// access-specifier: [C++ class.derived] 836/// 'private' 837/// 'protected' 838/// 'public' 839AccessSpecifier Parser::getAccessSpecifierIfPresent() const 840{ 841 switch (Tok.getKind()) { 842 default: return AS_none; 843 case tok::kw_private: return AS_private; 844 case tok::kw_protected: return AS_protected; 845 case tok::kw_public: return AS_public; 846 } 847} 848 849void Parser::HandleMemberFunctionDefaultArgs(Declarator& DeclaratorInfo, 850 DeclPtrTy ThisDecl) { 851 // We just declared a member function. If this member function 852 // has any default arguments, we'll need to parse them later. 853 LateParsedMethodDeclaration *LateMethod = 0; 854 DeclaratorChunk::FunctionTypeInfo &FTI 855 = DeclaratorInfo.getTypeObject(0).Fun; 856 for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { 857 if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { 858 if (!LateMethod) { 859 // Push this method onto the stack of late-parsed method 860 // declarations. 861 getCurrentClass().MethodDecls.push_back( 862 LateParsedMethodDeclaration(ThisDecl)); 863 LateMethod = &getCurrentClass().MethodDecls.back(); 864 865 // Add all of the parameters prior to this one (they don't 866 // have default arguments). 867 LateMethod->DefaultArgs.reserve(FTI.NumArgs); 868 for (unsigned I = 0; I < ParamIdx; ++I) 869 LateMethod->DefaultArgs.push_back( 870 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param)); 871 } 872 873 // Add this parameter to the list of parameters (it or may 874 // not have a default argument). 875 LateMethod->DefaultArgs.push_back( 876 LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, 877 FTI.ArgInfo[ParamIdx].DefaultArgTokens)); 878 } 879 } 880} 881 882/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. 883/// 884/// member-declaration: 885/// decl-specifier-seq[opt] member-declarator-list[opt] ';' 886/// function-definition ';'[opt] 887/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] 888/// using-declaration [TODO] 889/// [C++0x] static_assert-declaration 890/// template-declaration 891/// [GNU] '__extension__' member-declaration 892/// 893/// member-declarator-list: 894/// member-declarator 895/// member-declarator-list ',' member-declarator 896/// 897/// member-declarator: 898/// declarator pure-specifier[opt] 899/// declarator constant-initializer[opt] 900/// identifier[opt] ':' constant-expression 901/// 902/// pure-specifier: 903/// '= 0' 904/// 905/// constant-initializer: 906/// '=' constant-expression 907/// 908void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS) { 909 // static_assert-declaration 910 if (Tok.is(tok::kw_static_assert)) { 911 SourceLocation DeclEnd; 912 ParseStaticAssertDeclaration(DeclEnd); 913 return; 914 } 915 916 if (Tok.is(tok::kw_template)) { 917 SourceLocation DeclEnd; 918 ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd, 919 AS); 920 return; 921 } 922 923 // Handle: member-declaration ::= '__extension__' member-declaration 924 if (Tok.is(tok::kw___extension__)) { 925 // __extension__ silences extension warnings in the subexpression. 926 ExtensionRAIIObject O(Diags); // Use RAII to do this. 927 ConsumeToken(); 928 return ParseCXXClassMemberDeclaration(AS); 929 } 930 931 if (Tok.is(tok::kw_using)) { 932 // Eat 'using'. 933 SourceLocation UsingLoc = ConsumeToken(); 934 935 if (Tok.is(tok::kw_namespace)) { 936 Diag(UsingLoc, diag::err_using_namespace_in_class); 937 SkipUntil(tok::semi, true, true); 938 } 939 else { 940 SourceLocation DeclEnd; 941 // Otherwise, it must be using-declaration. 942 ParseUsingDeclaration(Declarator::MemberContext, UsingLoc, DeclEnd); 943 } 944 return; 945 } 946 947 SourceLocation DSStart = Tok.getLocation(); 948 // decl-specifier-seq: 949 // Parse the common declaration-specifiers piece. 950 DeclSpec DS; 951 ParseDeclarationSpecifiers(DS, ParsedTemplateInfo(), AS, DSC_class); 952 953 if (Tok.is(tok::semi)) { 954 ConsumeToken(); 955 956 if (DS.isFriendSpecified()) 957 Actions.ActOnFriendDecl(CurScope, &DS, /*IsDefinition*/ false); 958 else 959 Actions.ParsedFreeStandingDeclSpec(CurScope, DS); 960 961 return; 962 } 963 964 Declarator DeclaratorInfo(DS, Declarator::MemberContext); 965 966 if (Tok.isNot(tok::colon)) { 967 // Parse the first declarator. 968 ParseDeclarator(DeclaratorInfo); 969 // Error parsing the declarator? 970 if (!DeclaratorInfo.hasName()) { 971 // If so, skip until the semi-colon or a }. 972 SkipUntil(tok::r_brace, true); 973 if (Tok.is(tok::semi)) 974 ConsumeToken(); 975 return; 976 } 977 978 // function-definition: 979 if (Tok.is(tok::l_brace) 980 || (DeclaratorInfo.isFunctionDeclarator() && 981 (Tok.is(tok::colon) || Tok.is(tok::kw_try)))) { 982 if (!DeclaratorInfo.isFunctionDeclarator()) { 983 Diag(Tok, diag::err_func_def_no_params); 984 ConsumeBrace(); 985 SkipUntil(tok::r_brace, true); 986 return; 987 } 988 989 if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { 990 Diag(Tok, diag::err_function_declared_typedef); 991 // This recovery skips the entire function body. It would be nice 992 // to simply call ParseCXXInlineMethodDef() below, however Sema 993 // assumes the declarator represents a function, not a typedef. 994 ConsumeBrace(); 995 SkipUntil(tok::r_brace, true); 996 return; 997 } 998 999 ParseCXXInlineMethodDef(AS, DeclaratorInfo); 1000 return; 1001 } 1002 } 1003 1004 // member-declarator-list: 1005 // member-declarator 1006 // member-declarator-list ',' member-declarator 1007 1008 llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup; 1009 OwningExprResult BitfieldSize(Actions); 1010 OwningExprResult Init(Actions); 1011 bool Deleted = false; 1012 1013 while (1) { 1014 1015 // member-declarator: 1016 // declarator pure-specifier[opt] 1017 // declarator constant-initializer[opt] 1018 // identifier[opt] ':' constant-expression 1019 1020 if (Tok.is(tok::colon)) { 1021 ConsumeToken(); 1022 BitfieldSize = ParseConstantExpression(); 1023 if (BitfieldSize.isInvalid()) 1024 SkipUntil(tok::comma, true, true); 1025 } 1026 1027 // pure-specifier: 1028 // '= 0' 1029 // 1030 // constant-initializer: 1031 // '=' constant-expression 1032 // 1033 // defaulted/deleted function-definition: 1034 // '=' 'default' [TODO] 1035 // '=' 'delete' 1036 1037 if (Tok.is(tok::equal)) { 1038 ConsumeToken(); 1039 if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) { 1040 ConsumeToken(); 1041 Deleted = true; 1042 } else { 1043 Init = ParseInitializer(); 1044 if (Init.isInvalid()) 1045 SkipUntil(tok::comma, true, true); 1046 } 1047 } 1048 1049 // If attributes exist after the declarator, parse them. 1050 if (Tok.is(tok::kw___attribute)) { 1051 SourceLocation Loc; 1052 AttributeList *AttrList = ParseAttributes(&Loc); 1053 DeclaratorInfo.AddAttributes(AttrList, Loc); 1054 } 1055 1056 // NOTE: If Sema is the Action module and declarator is an instance field, 1057 // this call will *not* return the created decl; It will return null. 1058 // See Sema::ActOnCXXMemberDeclarator for details. 1059 1060 DeclPtrTy ThisDecl; 1061 if (DS.isFriendSpecified()) { 1062 // TODO: handle initializers, bitfields, 'delete' 1063 ThisDecl = Actions.ActOnFriendDecl(CurScope, &DeclaratorInfo, 1064 /*IsDefinition*/ false); 1065 } else 1066 ThisDecl = Actions.ActOnCXXMemberDeclarator(CurScope, AS, 1067 DeclaratorInfo, 1068 BitfieldSize.release(), 1069 Init.release(), 1070 Deleted); 1071 if (ThisDecl) 1072 DeclsInGroup.push_back(ThisDecl); 1073 1074 if (DeclaratorInfo.isFunctionDeclarator() && 1075 DeclaratorInfo.getDeclSpec().getStorageClassSpec() 1076 != DeclSpec::SCS_typedef) { 1077 HandleMemberFunctionDefaultArgs(DeclaratorInfo, ThisDecl); 1078 } 1079 1080 // If we don't have a comma, it is either the end of the list (a ';') 1081 // or an error, bail out. 1082 if (Tok.isNot(tok::comma)) 1083 break; 1084 1085 // Consume the comma. 1086 ConsumeToken(); 1087 1088 // Parse the next declarator. 1089 DeclaratorInfo.clear(); 1090 BitfieldSize = 0; 1091 Init = 0; 1092 Deleted = false; 1093 1094 // Attributes are only allowed on the second declarator. 1095 if (Tok.is(tok::kw___attribute)) { 1096 SourceLocation Loc; 1097 AttributeList *AttrList = ParseAttributes(&Loc); 1098 DeclaratorInfo.AddAttributes(AttrList, Loc); 1099 } 1100 1101 if (Tok.isNot(tok::colon)) 1102 ParseDeclarator(DeclaratorInfo); 1103 } 1104 1105 if (Tok.is(tok::semi)) { 1106 ConsumeToken(); 1107 Actions.FinalizeDeclaratorGroup(CurScope, DS, DeclsInGroup.data(), 1108 DeclsInGroup.size()); 1109 return; 1110 } 1111 1112 Diag(Tok, diag::err_expected_semi_decl_list); 1113 // Skip to end of block or statement 1114 SkipUntil(tok::r_brace, true, true); 1115 if (Tok.is(tok::semi)) 1116 ConsumeToken(); 1117 return; 1118} 1119 1120/// ParseCXXMemberSpecification - Parse the class definition. 1121/// 1122/// member-specification: 1123/// member-declaration member-specification[opt] 1124/// access-specifier ':' member-specification[opt] 1125/// 1126void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, 1127 unsigned TagType, DeclPtrTy TagDecl) { 1128 assert((TagType == DeclSpec::TST_struct || 1129 TagType == DeclSpec::TST_union || 1130 TagType == DeclSpec::TST_class) && "Invalid TagType!"); 1131 1132 PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, 1133 PP.getSourceManager(), 1134 "parsing struct/union/class body"); 1135 1136 SourceLocation LBraceLoc = ConsumeBrace(); 1137 1138 // Determine whether this is a top-level (non-nested) class. 1139 bool TopLevelClass = ClassStack.empty() || 1140 CurScope->isInCXXInlineMethodScope(); 1141 1142 // Enter a scope for the class. 1143 ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); 1144 1145 // Note that we are parsing a new (potentially-nested) class definition. 1146 ParsingClassDefinition ParsingDef(*this, TagDecl, TopLevelClass); 1147 1148 if (TagDecl) 1149 Actions.ActOnTagStartDefinition(CurScope, TagDecl); 1150 else { 1151 SkipUntil(tok::r_brace, false, false); 1152 return; 1153 } 1154 1155 // C++ 11p3: Members of a class defined with the keyword class are private 1156 // by default. Members of a class defined with the keywords struct or union 1157 // are public by default. 1158 AccessSpecifier CurAS; 1159 if (TagType == DeclSpec::TST_class) 1160 CurAS = AS_private; 1161 else 1162 CurAS = AS_public; 1163 1164 // While we still have something to read, read the member-declarations. 1165 while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { 1166 // Each iteration of this loop reads one member-declaration. 1167 1168 // Check for extraneous top-level semicolon. 1169 if (Tok.is(tok::semi)) { 1170 Diag(Tok, diag::ext_extra_struct_semi); 1171 ConsumeToken(); 1172 continue; 1173 } 1174 1175 AccessSpecifier AS = getAccessSpecifierIfPresent(); 1176 if (AS != AS_none) { 1177 // Current token is a C++ access specifier. 1178 CurAS = AS; 1179 ConsumeToken(); 1180 ExpectAndConsume(tok::colon, diag::err_expected_colon); 1181 continue; 1182 } 1183 1184 // Parse all the comma separated declarators. 1185 ParseCXXClassMemberDeclaration(CurAS); 1186 } 1187 1188 SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); 1189 1190 AttributeList *AttrList = 0; 1191 // If attributes exist after class contents, parse them. 1192 if (Tok.is(tok::kw___attribute)) 1193 AttrList = ParseAttributes(); // FIXME: where should I put them? 1194 1195 Actions.ActOnFinishCXXMemberSpecification(CurScope, RecordLoc, TagDecl, 1196 LBraceLoc, RBraceLoc); 1197 1198 // C++ 9.2p2: Within the class member-specification, the class is regarded as 1199 // complete within function bodies, default arguments, 1200 // exception-specifications, and constructor ctor-initializers (including 1201 // such things in nested classes). 1202 // 1203 // FIXME: Only function bodies and constructor ctor-initializers are 1204 // parsed correctly, fix the rest. 1205 if (TopLevelClass) { 1206 // We are not inside a nested class. This class and its nested classes 1207 // are complete and we can parse the delayed portions of method 1208 // declarations and the lexed inline method definitions. 1209 ParseLexedMethodDeclarations(getCurrentClass()); 1210 ParseLexedMethodDefs(getCurrentClass()); 1211 } 1212 1213 // Leave the class scope. 1214 ParsingDef.Pop(); 1215 ClassScope.Exit(); 1216 1217 Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc); 1218} 1219 1220/// ParseConstructorInitializer - Parse a C++ constructor initializer, 1221/// which explicitly initializes the members or base classes of a 1222/// class (C++ [class.base.init]). For example, the three initializers 1223/// after the ':' in the Derived constructor below: 1224/// 1225/// @code 1226/// class Base { }; 1227/// class Derived : Base { 1228/// int x; 1229/// float f; 1230/// public: 1231/// Derived(float f) : Base(), x(17), f(f) { } 1232/// }; 1233/// @endcode 1234/// 1235/// [C++] ctor-initializer: 1236/// ':' mem-initializer-list 1237/// 1238/// [C++] mem-initializer-list: 1239/// mem-initializer 1240/// mem-initializer , mem-initializer-list 1241void Parser::ParseConstructorInitializer(DeclPtrTy ConstructorDecl) { 1242 assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); 1243 1244 SourceLocation ColonLoc = ConsumeToken(); 1245 1246 llvm::SmallVector<MemInitTy*, 4> MemInitializers; 1247 1248 do { 1249 MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); 1250 if (!MemInit.isInvalid()) 1251 MemInitializers.push_back(MemInit.get()); 1252 1253 if (Tok.is(tok::comma)) 1254 ConsumeToken(); 1255 else if (Tok.is(tok::l_brace)) 1256 break; 1257 else { 1258 // Skip over garbage, until we get to '{'. Don't eat the '{'. 1259 Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); 1260 SkipUntil(tok::l_brace, true, true); 1261 break; 1262 } 1263 } while (true); 1264 1265 Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, 1266 MemInitializers.data(), MemInitializers.size()); 1267} 1268 1269/// ParseMemInitializer - Parse a C++ member initializer, which is 1270/// part of a constructor initializer that explicitly initializes one 1271/// member or base class (C++ [class.base.init]). See 1272/// ParseConstructorInitializer for an example. 1273/// 1274/// [C++] mem-initializer: 1275/// mem-initializer-id '(' expression-list[opt] ')' 1276/// 1277/// [C++] mem-initializer-id: 1278/// '::'[opt] nested-name-specifier[opt] class-name 1279/// identifier 1280Parser::MemInitResult Parser::ParseMemInitializer(DeclPtrTy ConstructorDecl) { 1281 // parse '::'[opt] nested-name-specifier[opt] 1282 CXXScopeSpec SS; 1283 ParseOptionalCXXScopeSpecifier(SS); 1284 TypeTy *TemplateTypeTy = 0; 1285 if (Tok.is(tok::annot_template_id)) { 1286 TemplateIdAnnotation *TemplateId 1287 = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); 1288 if (TemplateId->Kind == TNK_Type_template) { 1289 AnnotateTemplateIdTokenAsType(&SS); 1290 assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); 1291 TemplateTypeTy = Tok.getAnnotationValue(); 1292 } 1293 // FIXME. May need to check for TNK_Dependent_template as well. 1294 } 1295 if (!TemplateTypeTy && Tok.isNot(tok::identifier)) { 1296 Diag(Tok, diag::err_expected_member_or_base_name); 1297 return true; 1298 } 1299 1300 // Get the identifier. This may be a member name or a class name, 1301 // but we'll let the semantic analysis determine which it is. 1302 IdentifierInfo *II = Tok.is(tok::identifier) ? Tok.getIdentifierInfo() : 0; 1303 SourceLocation IdLoc = ConsumeToken(); 1304 1305 // Parse the '('. 1306 if (Tok.isNot(tok::l_paren)) { 1307 Diag(Tok, diag::err_expected_lparen); 1308 return true; 1309 } 1310 SourceLocation LParenLoc = ConsumeParen(); 1311 1312 // Parse the optional expression-list. 1313 ExprVector ArgExprs(Actions); 1314 CommaLocsTy CommaLocs; 1315 if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { 1316 SkipUntil(tok::r_paren); 1317 return true; 1318 } 1319 1320 SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1321 1322 return Actions.ActOnMemInitializer(ConstructorDecl, CurScope, SS, II, 1323 TemplateTypeTy, IdLoc, 1324 LParenLoc, ArgExprs.take(), 1325 ArgExprs.size(), CommaLocs.data(), 1326 RParenLoc); 1327} 1328 1329/// ParseExceptionSpecification - Parse a C++ exception-specification 1330/// (C++ [except.spec]). 1331/// 1332/// exception-specification: 1333/// 'throw' '(' type-id-list [opt] ')' 1334/// [MS] 'throw' '(' '...' ')' 1335/// 1336/// type-id-list: 1337/// type-id 1338/// type-id-list ',' type-id 1339/// 1340bool Parser::ParseExceptionSpecification(SourceLocation &EndLoc, 1341 llvm::SmallVector<TypeTy*, 2> 1342 &Exceptions, 1343 llvm::SmallVector<SourceRange, 2> 1344 &Ranges, 1345 bool &hasAnyExceptionSpec) { 1346 assert(Tok.is(tok::kw_throw) && "expected throw"); 1347 1348 SourceLocation ThrowLoc = ConsumeToken(); 1349 1350 if (!Tok.is(tok::l_paren)) { 1351 return Diag(Tok, diag::err_expected_lparen_after) << "throw"; 1352 } 1353 SourceLocation LParenLoc = ConsumeParen(); 1354 1355 // Parse throw(...), a Microsoft extension that means "this function 1356 // can throw anything". 1357 if (Tok.is(tok::ellipsis)) { 1358 hasAnyExceptionSpec = true; 1359 SourceLocation EllipsisLoc = ConsumeToken(); 1360 if (!getLang().Microsoft) 1361 Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); 1362 EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1363 return false; 1364 } 1365 1366 // Parse the sequence of type-ids. 1367 SourceRange Range; 1368 while (Tok.isNot(tok::r_paren)) { 1369 TypeResult Res(ParseTypeName(&Range)); 1370 if (!Res.isInvalid()) { 1371 Exceptions.push_back(Res.get()); 1372 Ranges.push_back(Range); 1373 } 1374 if (Tok.is(tok::comma)) 1375 ConsumeToken(); 1376 else 1377 break; 1378 } 1379 1380 EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); 1381 return false; 1382} 1383 1384/// \brief We have just started parsing the definition of a new class, 1385/// so push that class onto our stack of classes that is currently 1386/// being parsed. 1387void Parser::PushParsingClass(DeclPtrTy ClassDecl, bool TopLevelClass) { 1388 assert((TopLevelClass || !ClassStack.empty()) && 1389 "Nested class without outer class"); 1390 ClassStack.push(new ParsingClass(ClassDecl, TopLevelClass)); 1391} 1392 1393/// \brief Deallocate the given parsed class and all of its nested 1394/// classes. 1395void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { 1396 for (unsigned I = 0, N = Class->NestedClasses.size(); I != N; ++I) 1397 DeallocateParsedClasses(Class->NestedClasses[I]); 1398 delete Class; 1399} 1400 1401/// \brief Pop the top class of the stack of classes that are 1402/// currently being parsed. 1403/// 1404/// This routine should be called when we have finished parsing the 1405/// definition of a class, but have not yet popped the Scope 1406/// associated with the class's definition. 1407/// 1408/// \returns true if the class we've popped is a top-level class, 1409/// false otherwise. 1410void Parser::PopParsingClass() { 1411 assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); 1412 1413 ParsingClass *Victim = ClassStack.top(); 1414 ClassStack.pop(); 1415 if (Victim->TopLevelClass) { 1416 // Deallocate all of the nested classes of this class, 1417 // recursively: we don't need to keep any of this information. 1418 DeallocateParsedClasses(Victim); 1419 return; 1420 } 1421 assert(!ClassStack.empty() && "Missing top-level class?"); 1422 1423 if (Victim->MethodDecls.empty() && Victim->MethodDefs.empty() && 1424 Victim->NestedClasses.empty()) { 1425 // The victim is a nested class, but we will not need to perform 1426 // any processing after the definition of this class since it has 1427 // no members whose handling was delayed. Therefore, we can just 1428 // remove this nested class. 1429 delete Victim; 1430 return; 1431 } 1432 1433 // This nested class has some members that will need to be processed 1434 // after the top-level class is completely defined. Therefore, add 1435 // it to the list of nested classes within its parent. 1436 assert(CurScope->isClassScope() && "Nested class outside of class scope?"); 1437 ClassStack.top()->NestedClasses.push_back(Victim); 1438 Victim->TemplateScope = CurScope->getParent()->isTemplateParamScope(); 1439} 1440