| //===--- ParseDeclCXX.cpp - C++ Declaration Parsing -----------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements the C++ Declaration portions of the Parser interfaces. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Parse/Parser.h" |
| #include "clang/Parse/ParseDiagnostic.h" |
| #include "clang/Parse/DeclSpec.h" |
| #include "clang/Parse/Scope.h" |
| #include "AstGuard.h" |
| #include "ExtensionRAIIObject.h" |
| using namespace clang; |
| |
| /// ParseNamespace - We know that the current token is a namespace keyword. This |
| /// may either be a top level namespace or a block-level namespace alias. |
| /// |
| /// namespace-definition: [C++ 7.3: basic.namespace] |
| /// named-namespace-definition |
| /// unnamed-namespace-definition |
| /// |
| /// unnamed-namespace-definition: |
| /// 'namespace' attributes[opt] '{' namespace-body '}' |
| /// |
| /// named-namespace-definition: |
| /// original-namespace-definition |
| /// extension-namespace-definition |
| /// |
| /// original-namespace-definition: |
| /// 'namespace' identifier attributes[opt] '{' namespace-body '}' |
| /// |
| /// extension-namespace-definition: |
| /// 'namespace' original-namespace-name '{' namespace-body '}' |
| /// |
| /// namespace-alias-definition: [C++ 7.3.2: namespace.alias] |
| /// 'namespace' identifier '=' qualified-namespace-specifier ';' |
| /// |
| Parser::DeclPtrTy Parser::ParseNamespace(unsigned Context, |
| SourceLocation &DeclEnd) { |
| assert(Tok.is(tok::kw_namespace) && "Not a namespace!"); |
| SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'. |
| |
| SourceLocation IdentLoc; |
| IdentifierInfo *Ident = 0; |
| |
| if (Tok.is(tok::identifier)) { |
| Ident = Tok.getIdentifierInfo(); |
| IdentLoc = ConsumeToken(); // eat the identifier. |
| } |
| |
| // Read label attributes, if present. |
| Action::AttrTy *AttrList = 0; |
| if (Tok.is(tok::kw___attribute)) |
| // FIXME: save these somewhere. |
| AttrList = ParseAttributes(); |
| |
| if (Tok.is(tok::equal)) |
| // FIXME: Verify no attributes were present. |
| return ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd); |
| |
| if (Tok.isNot(tok::l_brace)) { |
| Diag(Tok, Ident ? diag::err_expected_lbrace : |
| diag::err_expected_ident_lbrace); |
| return DeclPtrTy(); |
| } |
| |
| SourceLocation LBrace = ConsumeBrace(); |
| |
| // Enter a scope for the namespace. |
| ParseScope NamespaceScope(this, Scope::DeclScope); |
| |
| DeclPtrTy NamespcDecl = |
| Actions.ActOnStartNamespaceDef(CurScope, IdentLoc, Ident, LBrace); |
| |
| PrettyStackTraceActionsDecl CrashInfo(NamespcDecl, NamespaceLoc, Actions, |
| PP.getSourceManager(), |
| "parsing namespace"); |
| |
| while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) |
| ParseExternalDeclaration(); |
| |
| // Leave the namespace scope. |
| NamespaceScope.Exit(); |
| |
| SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBrace); |
| Actions.ActOnFinishNamespaceDef(NamespcDecl, RBraceLoc); |
| |
| DeclEnd = RBraceLoc; |
| return NamespcDecl; |
| } |
| |
| /// ParseNamespaceAlias - Parse the part after the '=' in a namespace |
| /// alias definition. |
| /// |
| Parser::DeclPtrTy Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc, |
| SourceLocation AliasLoc, |
| IdentifierInfo *Alias, |
| SourceLocation &DeclEnd) { |
| assert(Tok.is(tok::equal) && "Not equal token"); |
| |
| ConsumeToken(); // eat the '='. |
| |
| CXXScopeSpec SS; |
| // Parse (optional) nested-name-specifier. |
| ParseOptionalCXXScopeSpecifier(SS); |
| |
| if (SS.isInvalid() || Tok.isNot(tok::identifier)) { |
| Diag(Tok, diag::err_expected_namespace_name); |
| // Skip to end of the definition and eat the ';'. |
| SkipUntil(tok::semi); |
| return DeclPtrTy(); |
| } |
| |
| // Parse identifier. |
| IdentifierInfo *Ident = Tok.getIdentifierInfo(); |
| SourceLocation IdentLoc = ConsumeToken(); |
| |
| // Eat the ';'. |
| DeclEnd = Tok.getLocation(); |
| ExpectAndConsume(tok::semi, diag::err_expected_semi_after, |
| "namespace name", tok::semi); |
| |
| return Actions.ActOnNamespaceAliasDef(CurScope, NamespaceLoc, AliasLoc, Alias, |
| SS, IdentLoc, Ident); |
| } |
| |
| /// ParseLinkage - We know that the current token is a string_literal |
| /// and just before that, that extern was seen. |
| /// |
| /// linkage-specification: [C++ 7.5p2: dcl.link] |
| /// 'extern' string-literal '{' declaration-seq[opt] '}' |
| /// 'extern' string-literal declaration |
| /// |
| Parser::DeclPtrTy Parser::ParseLinkage(unsigned Context) { |
| assert(Tok.is(tok::string_literal) && "Not a string literal!"); |
| llvm::SmallVector<char, 8> LangBuffer; |
| // LangBuffer is guaranteed to be big enough. |
| LangBuffer.resize(Tok.getLength()); |
| const char *LangBufPtr = &LangBuffer[0]; |
| unsigned StrSize = PP.getSpelling(Tok, LangBufPtr); |
| |
| SourceLocation Loc = ConsumeStringToken(); |
| |
| ParseScope LinkageScope(this, Scope::DeclScope); |
| DeclPtrTy LinkageSpec |
| = Actions.ActOnStartLinkageSpecification(CurScope, |
| /*FIXME: */SourceLocation(), |
| Loc, LangBufPtr, StrSize, |
| Tok.is(tok::l_brace)? Tok.getLocation() |
| : SourceLocation()); |
| |
| if (Tok.isNot(tok::l_brace)) { |
| ParseDeclarationOrFunctionDefinition(); |
| return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, |
| SourceLocation()); |
| } |
| |
| SourceLocation LBrace = ConsumeBrace(); |
| while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { |
| ParseExternalDeclaration(); |
| } |
| |
| SourceLocation RBrace = MatchRHSPunctuation(tok::r_brace, LBrace); |
| return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, RBrace); |
| } |
| |
| /// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or |
| /// using-directive. Assumes that current token is 'using'. |
| Parser::DeclPtrTy Parser::ParseUsingDirectiveOrDeclaration(unsigned Context, |
| SourceLocation &DeclEnd) { |
| assert(Tok.is(tok::kw_using) && "Not using token"); |
| |
| // Eat 'using'. |
| SourceLocation UsingLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::kw_namespace)) |
| // Next token after 'using' is 'namespace' so it must be using-directive |
| return ParseUsingDirective(Context, UsingLoc, DeclEnd); |
| |
| // Otherwise, it must be using-declaration. |
| return ParseUsingDeclaration(Context, UsingLoc, DeclEnd); |
| } |
| |
| /// ParseUsingDirective - Parse C++ using-directive, assumes |
| /// that current token is 'namespace' and 'using' was already parsed. |
| /// |
| /// using-directive: [C++ 7.3.p4: namespace.udir] |
| /// 'using' 'namespace' ::[opt] nested-name-specifier[opt] |
| /// namespace-name ; |
| /// [GNU] using-directive: |
| /// 'using' 'namespace' ::[opt] nested-name-specifier[opt] |
| /// namespace-name attributes[opt] ; |
| /// |
| Parser::DeclPtrTy Parser::ParseUsingDirective(unsigned Context, |
| SourceLocation UsingLoc, |
| SourceLocation &DeclEnd) { |
| assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token"); |
| |
| // Eat 'namespace'. |
| SourceLocation NamespcLoc = ConsumeToken(); |
| |
| CXXScopeSpec SS; |
| // Parse (optional) nested-name-specifier. |
| ParseOptionalCXXScopeSpecifier(SS); |
| |
| AttributeList *AttrList = 0; |
| IdentifierInfo *NamespcName = 0; |
| SourceLocation IdentLoc = SourceLocation(); |
| |
| // Parse namespace-name. |
| if (SS.isInvalid() || Tok.isNot(tok::identifier)) { |
| Diag(Tok, diag::err_expected_namespace_name); |
| // If there was invalid namespace name, skip to end of decl, and eat ';'. |
| SkipUntil(tok::semi); |
| // FIXME: Are there cases, when we would like to call ActOnUsingDirective? |
| return DeclPtrTy(); |
| } |
| |
| // Parse identifier. |
| NamespcName = Tok.getIdentifierInfo(); |
| IdentLoc = ConsumeToken(); |
| |
| // Parse (optional) attributes (most likely GNU strong-using extension). |
| if (Tok.is(tok::kw___attribute)) |
| AttrList = ParseAttributes(); |
| |
| // Eat ';'. |
| DeclEnd = Tok.getLocation(); |
| ExpectAndConsume(tok::semi, diag::err_expected_semi_after, |
| AttrList ? "attributes list" : "namespace name", tok::semi); |
| |
| return Actions.ActOnUsingDirective(CurScope, UsingLoc, NamespcLoc, SS, |
| IdentLoc, NamespcName, AttrList); |
| } |
| |
| /// ParseUsingDeclaration - Parse C++ using-declaration. Assumes that |
| /// 'using' was already seen. |
| /// |
| /// using-declaration: [C++ 7.3.p3: namespace.udecl] |
| /// 'using' 'typename'[opt] ::[opt] nested-name-specifier |
| /// unqualified-id [TODO] |
| /// 'using' :: unqualified-id [TODO] |
| /// |
| Parser::DeclPtrTy Parser::ParseUsingDeclaration(unsigned Context, |
| SourceLocation UsingLoc, |
| SourceLocation &DeclEnd) { |
| assert(false && "Not implemented"); |
| // FIXME: Implement parsing. |
| return DeclPtrTy(); |
| } |
| |
| /// ParseStaticAssertDeclaration - Parse C++0x static_assert-declaratoion. |
| /// |
| /// static_assert-declaration: |
| /// static_assert ( constant-expression , string-literal ) ; |
| /// |
| Parser::DeclPtrTy Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){ |
| assert(Tok.is(tok::kw_static_assert) && "Not a static_assert declaration"); |
| SourceLocation StaticAssertLoc = ConsumeToken(); |
| |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(Tok, diag::err_expected_lparen); |
| return DeclPtrTy(); |
| } |
| |
| SourceLocation LParenLoc = ConsumeParen(); |
| |
| OwningExprResult AssertExpr(ParseConstantExpression()); |
| if (AssertExpr.isInvalid()) { |
| SkipUntil(tok::semi); |
| return DeclPtrTy(); |
| } |
| |
| if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi)) |
| return DeclPtrTy(); |
| |
| if (Tok.isNot(tok::string_literal)) { |
| Diag(Tok, diag::err_expected_string_literal); |
| SkipUntil(tok::semi); |
| return DeclPtrTy(); |
| } |
| |
| OwningExprResult AssertMessage(ParseStringLiteralExpression()); |
| if (AssertMessage.isInvalid()) |
| return DeclPtrTy(); |
| |
| MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| |
| DeclEnd = Tok.getLocation(); |
| ExpectAndConsume(tok::semi, diag::err_expected_semi_after_static_assert); |
| |
| return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, move(AssertExpr), |
| move(AssertMessage)); |
| } |
| |
| /// ParseClassName - Parse a C++ class-name, which names a class. Note |
| /// that we only check that the result names a type; semantic analysis |
| /// will need to verify that the type names a class. The result is |
| /// either a type or NULL, depending on whether a type name was |
| /// found. |
| /// |
| /// class-name: [C++ 9.1] |
| /// identifier |
| /// simple-template-id |
| /// |
| Parser::TypeResult Parser::ParseClassName(SourceLocation &EndLocation, |
| const CXXScopeSpec *SS) { |
| // Check whether we have a template-id that names a type. |
| if (Tok.is(tok::annot_template_id)) { |
| TemplateIdAnnotation *TemplateId |
| = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
| if (TemplateId->Kind == TNK_Type_template) { |
| AnnotateTemplateIdTokenAsType(SS); |
| |
| assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); |
| TypeTy *Type = Tok.getAnnotationValue(); |
| EndLocation = Tok.getAnnotationEndLoc(); |
| ConsumeToken(); |
| |
| if (Type) |
| return Type; |
| return true; |
| } |
| |
| // Fall through to produce an error below. |
| } |
| |
| if (Tok.isNot(tok::identifier)) { |
| Diag(Tok, diag::err_expected_class_name); |
| return true; |
| } |
| |
| // We have an identifier; check whether it is actually a type. |
| TypeTy *Type = Actions.getTypeName(*Tok.getIdentifierInfo(), |
| Tok.getLocation(), CurScope, SS); |
| if (!Type) { |
| Diag(Tok, diag::err_expected_class_name); |
| return true; |
| } |
| |
| // Consume the identifier. |
| EndLocation = ConsumeToken(); |
| return Type; |
| } |
| |
| /// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or |
| /// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which |
| /// until we reach the start of a definition or see a token that |
| /// cannot start a definition. |
| /// |
| /// class-specifier: [C++ class] |
| /// class-head '{' member-specification[opt] '}' |
| /// class-head '{' member-specification[opt] '}' attributes[opt] |
| /// class-head: |
| /// class-key identifier[opt] base-clause[opt] |
| /// class-key nested-name-specifier identifier base-clause[opt] |
| /// class-key nested-name-specifier[opt] simple-template-id |
| /// base-clause[opt] |
| /// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt] |
| /// [GNU] class-key attributes[opt] nested-name-specifier |
| /// identifier base-clause[opt] |
| /// [GNU] class-key attributes[opt] nested-name-specifier[opt] |
| /// simple-template-id base-clause[opt] |
| /// class-key: |
| /// 'class' |
| /// 'struct' |
| /// 'union' |
| /// |
| /// elaborated-type-specifier: [C++ dcl.type.elab] |
| /// class-key ::[opt] nested-name-specifier[opt] identifier |
| /// class-key ::[opt] nested-name-specifier[opt] 'template'[opt] |
| /// simple-template-id |
| /// |
| /// Note that the C++ class-specifier and elaborated-type-specifier, |
| /// together, subsume the C99 struct-or-union-specifier: |
| /// |
| /// struct-or-union-specifier: [C99 6.7.2.1] |
| /// struct-or-union identifier[opt] '{' struct-contents '}' |
| /// struct-or-union identifier |
| /// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents |
| /// '}' attributes[opt] |
| /// [GNU] struct-or-union attributes[opt] identifier |
| /// struct-or-union: |
| /// 'struct' |
| /// 'union' |
| void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind, |
| SourceLocation StartLoc, DeclSpec &DS, |
| TemplateParameterLists *TemplateParams, |
| AccessSpecifier AS) { |
| DeclSpec::TST TagType; |
| if (TagTokKind == tok::kw_struct) |
| TagType = DeclSpec::TST_struct; |
| else if (TagTokKind == tok::kw_class) |
| TagType = DeclSpec::TST_class; |
| else { |
| assert(TagTokKind == tok::kw_union && "Not a class specifier"); |
| TagType = DeclSpec::TST_union; |
| } |
| |
| AttributeList *Attr = 0; |
| // If attributes exist after tag, parse them. |
| if (Tok.is(tok::kw___attribute)) |
| Attr = ParseAttributes(); |
| |
| // If declspecs exist after tag, parse them. |
| if (Tok.is(tok::kw___declspec) && PP.getLangOptions().Microsoft) |
| FuzzyParseMicrosoftDeclSpec(); |
| |
| // Parse the (optional) nested-name-specifier. |
| CXXScopeSpec SS; |
| if (getLang().CPlusPlus && ParseOptionalCXXScopeSpecifier(SS)) |
| if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) |
| Diag(Tok, diag::err_expected_ident); |
| |
| // Parse the (optional) class name or simple-template-id. |
| IdentifierInfo *Name = 0; |
| SourceLocation NameLoc; |
| TemplateIdAnnotation *TemplateId = 0; |
| if (Tok.is(tok::identifier)) { |
| Name = Tok.getIdentifierInfo(); |
| NameLoc = ConsumeToken(); |
| } else if (Tok.is(tok::annot_template_id)) { |
| TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
| NameLoc = ConsumeToken(); |
| |
| if (TemplateId->Kind != TNK_Type_template) { |
| // The template-name in the simple-template-id refers to |
| // something other than a class template. Give an appropriate |
| // error message and skip to the ';'. |
| SourceRange Range(NameLoc); |
| if (SS.isNotEmpty()) |
| Range.setBegin(SS.getBeginLoc()); |
| |
| Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) |
| << Name << static_cast<int>(TemplateId->Kind) << Range; |
| |
| DS.SetTypeSpecError(); |
| SkipUntil(tok::semi, false, true); |
| TemplateId->Destroy(); |
| return; |
| } |
| } |
| |
| // There are three options here. If we have 'struct foo;', then |
| // this is a forward declaration. If we have 'struct foo {...' or |
| // 'struct foo :...' then this is a definition. Otherwise we have |
| // something like 'struct foo xyz', a reference. |
| Action::TagKind TK; |
| if (Tok.is(tok::l_brace) || (getLang().CPlusPlus && Tok.is(tok::colon))) |
| TK = Action::TK_Definition; |
| else if (Tok.is(tok::semi)) |
| TK = Action::TK_Declaration; |
| else |
| TK = Action::TK_Reference; |
| |
| if (!Name && !TemplateId && TK != Action::TK_Definition) { |
| // We have a declaration or reference to an anonymous class. |
| Diag(StartLoc, diag::err_anon_type_definition) |
| << DeclSpec::getSpecifierName(TagType); |
| |
| // Skip the rest of this declarator, up until the comma or semicolon. |
| SkipUntil(tok::comma, true); |
| |
| if (TemplateId) |
| TemplateId->Destroy(); |
| return; |
| } |
| |
| // Create the tag portion of the class or class template. |
| Action::DeclResult TagOrTempResult; |
| if (TemplateId && TK != Action::TK_Reference) { |
| // Explicit specialization or class template partial |
| // specialization. Let semantic analysis decide. |
| ASTTemplateArgsPtr TemplateArgsPtr(Actions, |
| TemplateId->getTemplateArgs(), |
| TemplateId->getTemplateArgIsType(), |
| TemplateId->NumArgs); |
| TagOrTempResult |
| = Actions.ActOnClassTemplateSpecialization(CurScope, TagType, TK, |
| StartLoc, SS, |
| TemplateTy::make(TemplateId->Template), |
| TemplateId->TemplateNameLoc, |
| TemplateId->LAngleLoc, |
| TemplateArgsPtr, |
| TemplateId->getTemplateArgLocations(), |
| TemplateId->RAngleLoc, |
| Attr, |
| Action::MultiTemplateParamsArg(Actions, |
| TemplateParams? &(*TemplateParams)[0] : 0, |
| TemplateParams? TemplateParams->size() : 0)); |
| TemplateId->Destroy(); |
| } else if (TemplateParams && TK != Action::TK_Reference) |
| TagOrTempResult = Actions.ActOnClassTemplate(CurScope, TagType, TK, |
| StartLoc, SS, Name, NameLoc, |
| Attr, |
| Action::MultiTemplateParamsArg(Actions, |
| &(*TemplateParams)[0], |
| TemplateParams->size()), |
| AS); |
| else |
| TagOrTempResult = Actions.ActOnTag(CurScope, TagType, TK, StartLoc, SS, Name, |
| NameLoc, Attr, AS); |
| |
| // Parse the optional base clause (C++ only). |
| if (getLang().CPlusPlus && Tok.is(tok::colon)) |
| ParseBaseClause(TagOrTempResult.get()); |
| |
| // If there is a body, parse it and inform the actions module. |
| if (Tok.is(tok::l_brace)) |
| if (getLang().CPlusPlus) |
| ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); |
| else |
| ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); |
| else if (TK == Action::TK_Definition) { |
| // FIXME: Complain that we have a base-specifier list but no |
| // definition. |
| Diag(Tok, diag::err_expected_lbrace); |
| } |
| |
| const char *PrevSpec = 0; |
| if (TagOrTempResult.isInvalid()) |
| DS.SetTypeSpecError(); |
| else if (DS.SetTypeSpecType(TagType, StartLoc, PrevSpec, |
| TagOrTempResult.get().getAs<void>())) |
| Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec; |
| } |
| |
| /// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived]. |
| /// |
| /// base-clause : [C++ class.derived] |
| /// ':' base-specifier-list |
| /// base-specifier-list: |
| /// base-specifier '...'[opt] |
| /// base-specifier-list ',' base-specifier '...'[opt] |
| void Parser::ParseBaseClause(DeclPtrTy ClassDecl) { |
| assert(Tok.is(tok::colon) && "Not a base clause"); |
| ConsumeToken(); |
| |
| // Build up an array of parsed base specifiers. |
| llvm::SmallVector<BaseTy *, 8> BaseInfo; |
| |
| while (true) { |
| // Parse a base-specifier. |
| BaseResult Result = ParseBaseSpecifier(ClassDecl); |
| if (Result.isInvalid()) { |
| // Skip the rest of this base specifier, up until the comma or |
| // opening brace. |
| SkipUntil(tok::comma, tok::l_brace, true, true); |
| } else { |
| // Add this to our array of base specifiers. |
| BaseInfo.push_back(Result.get()); |
| } |
| |
| // If the next token is a comma, consume it and keep reading |
| // base-specifiers. |
| if (Tok.isNot(tok::comma)) break; |
| |
| // Consume the comma. |
| ConsumeToken(); |
| } |
| |
| // Attach the base specifiers |
| Actions.ActOnBaseSpecifiers(ClassDecl, &BaseInfo[0], BaseInfo.size()); |
| } |
| |
| /// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is |
| /// one entry in the base class list of a class specifier, for example: |
| /// class foo : public bar, virtual private baz { |
| /// 'public bar' and 'virtual private baz' are each base-specifiers. |
| /// |
| /// base-specifier: [C++ class.derived] |
| /// ::[opt] nested-name-specifier[opt] class-name |
| /// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt] |
| /// class-name |
| /// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt] |
| /// class-name |
| Parser::BaseResult Parser::ParseBaseSpecifier(DeclPtrTy ClassDecl) { |
| bool IsVirtual = false; |
| SourceLocation StartLoc = Tok.getLocation(); |
| |
| // Parse the 'virtual' keyword. |
| if (Tok.is(tok::kw_virtual)) { |
| ConsumeToken(); |
| IsVirtual = true; |
| } |
| |
| // Parse an (optional) access specifier. |
| AccessSpecifier Access = getAccessSpecifierIfPresent(); |
| if (Access) |
| ConsumeToken(); |
| |
| // Parse the 'virtual' keyword (again!), in case it came after the |
| // access specifier. |
| if (Tok.is(tok::kw_virtual)) { |
| SourceLocation VirtualLoc = ConsumeToken(); |
| if (IsVirtual) { |
| // Complain about duplicate 'virtual' |
| Diag(VirtualLoc, diag::err_dup_virtual) |
| << CodeModificationHint::CreateRemoval(SourceRange(VirtualLoc)); |
| } |
| |
| IsVirtual = true; |
| } |
| |
| // Parse optional '::' and optional nested-name-specifier. |
| CXXScopeSpec SS; |
| ParseOptionalCXXScopeSpecifier(SS); |
| |
| // The location of the base class itself. |
| SourceLocation BaseLoc = Tok.getLocation(); |
| |
| // Parse the class-name. |
| SourceLocation EndLocation; |
| TypeResult BaseType = ParseClassName(EndLocation, &SS); |
| if (BaseType.isInvalid()) |
| return true; |
| |
| // Find the complete source range for the base-specifier. |
| SourceRange Range(StartLoc, EndLocation); |
| |
| // Notify semantic analysis that we have parsed a complete |
| // base-specifier. |
| return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access, |
| BaseType.get(), BaseLoc); |
| } |
| |
| /// getAccessSpecifierIfPresent - Determine whether the next token is |
| /// a C++ access-specifier. |
| /// |
| /// access-specifier: [C++ class.derived] |
| /// 'private' |
| /// 'protected' |
| /// 'public' |
| AccessSpecifier Parser::getAccessSpecifierIfPresent() const |
| { |
| switch (Tok.getKind()) { |
| default: return AS_none; |
| case tok::kw_private: return AS_private; |
| case tok::kw_protected: return AS_protected; |
| case tok::kw_public: return AS_public; |
| } |
| } |
| |
| /// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration. |
| /// |
| /// member-declaration: |
| /// decl-specifier-seq[opt] member-declarator-list[opt] ';' |
| /// function-definition ';'[opt] |
| /// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO] |
| /// using-declaration [TODO] |
| /// [C++0x] static_assert-declaration |
| /// template-declaration |
| /// [GNU] '__extension__' member-declaration |
| /// |
| /// member-declarator-list: |
| /// member-declarator |
| /// member-declarator-list ',' member-declarator |
| /// |
| /// member-declarator: |
| /// declarator pure-specifier[opt] |
| /// declarator constant-initializer[opt] |
| /// identifier[opt] ':' constant-expression |
| /// |
| /// pure-specifier: |
| /// '= 0' |
| /// |
| /// constant-initializer: |
| /// '=' constant-expression |
| /// |
| void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS) { |
| // static_assert-declaration |
| if (Tok.is(tok::kw_static_assert)) { |
| SourceLocation DeclEnd; |
| ParseStaticAssertDeclaration(DeclEnd); |
| return; |
| } |
| |
| if (Tok.is(tok::kw_template)) { |
| SourceLocation DeclEnd; |
| ParseTemplateDeclarationOrSpecialization(Declarator::MemberContext, DeclEnd, |
| AS); |
| return; |
| } |
| |
| // Handle: member-declaration ::= '__extension__' member-declaration |
| if (Tok.is(tok::kw___extension__)) { |
| // __extension__ silences extension warnings in the subexpression. |
| ExtensionRAIIObject O(Diags); // Use RAII to do this. |
| ConsumeToken(); |
| return ParseCXXClassMemberDeclaration(AS); |
| } |
| |
| SourceLocation DSStart = Tok.getLocation(); |
| // decl-specifier-seq: |
| // Parse the common declaration-specifiers piece. |
| DeclSpec DS; |
| ParseDeclarationSpecifiers(DS, 0, AS); |
| |
| if (Tok.is(tok::semi)) { |
| ConsumeToken(); |
| // C++ 9.2p7: The member-declarator-list can be omitted only after a |
| // class-specifier or an enum-specifier or in a friend declaration. |
| // FIXME: Friend declarations. |
| switch (DS.getTypeSpecType()) { |
| case DeclSpec::TST_struct: |
| case DeclSpec::TST_union: |
| case DeclSpec::TST_class: |
| case DeclSpec::TST_enum: |
| Actions.ParsedFreeStandingDeclSpec(CurScope, DS); |
| return; |
| default: |
| Diag(DSStart, diag::err_no_declarators); |
| return; |
| } |
| } |
| |
| Declarator DeclaratorInfo(DS, Declarator::MemberContext); |
| |
| if (Tok.isNot(tok::colon)) { |
| // Parse the first declarator. |
| ParseDeclarator(DeclaratorInfo); |
| // Error parsing the declarator? |
| if (!DeclaratorInfo.hasName()) { |
| // If so, skip until the semi-colon or a }. |
| SkipUntil(tok::r_brace, true); |
| if (Tok.is(tok::semi)) |
| ConsumeToken(); |
| return; |
| } |
| |
| // function-definition: |
| if (Tok.is(tok::l_brace) |
| || (DeclaratorInfo.isFunctionDeclarator() && Tok.is(tok::colon))) { |
| if (!DeclaratorInfo.isFunctionDeclarator()) { |
| Diag(Tok, diag::err_func_def_no_params); |
| ConsumeBrace(); |
| SkipUntil(tok::r_brace, true); |
| return; |
| } |
| |
| if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { |
| Diag(Tok, diag::err_function_declared_typedef); |
| // This recovery skips the entire function body. It would be nice |
| // to simply call ParseCXXInlineMethodDef() below, however Sema |
| // assumes the declarator represents a function, not a typedef. |
| ConsumeBrace(); |
| SkipUntil(tok::r_brace, true); |
| return; |
| } |
| |
| ParseCXXInlineMethodDef(AS, DeclaratorInfo); |
| return; |
| } |
| } |
| |
| // member-declarator-list: |
| // member-declarator |
| // member-declarator-list ',' member-declarator |
| |
| llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup; |
| OwningExprResult BitfieldSize(Actions); |
| OwningExprResult Init(Actions); |
| bool Deleted = false; |
| |
| while (1) { |
| |
| // member-declarator: |
| // declarator pure-specifier[opt] |
| // declarator constant-initializer[opt] |
| // identifier[opt] ':' constant-expression |
| |
| if (Tok.is(tok::colon)) { |
| ConsumeToken(); |
| BitfieldSize = ParseConstantExpression(); |
| if (BitfieldSize.isInvalid()) |
| SkipUntil(tok::comma, true, true); |
| } |
| |
| // pure-specifier: |
| // '= 0' |
| // |
| // constant-initializer: |
| // '=' constant-expression |
| // |
| // defaulted/deleted function-definition: |
| // '=' 'default' [TODO] |
| // '=' 'delete' |
| |
| if (Tok.is(tok::equal)) { |
| ConsumeToken(); |
| if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) { |
| ConsumeToken(); |
| Deleted = true; |
| } else { |
| Init = ParseInitializer(); |
| if (Init.isInvalid()) |
| SkipUntil(tok::comma, true, true); |
| } |
| } |
| |
| // If attributes exist after the declarator, parse them. |
| if (Tok.is(tok::kw___attribute)) { |
| SourceLocation Loc; |
| AttributeList *AttrList = ParseAttributes(&Loc); |
| DeclaratorInfo.AddAttributes(AttrList, Loc); |
| } |
| |
| // NOTE: If Sema is the Action module and declarator is an instance field, |
| // this call will *not* return the created decl; It will return null. |
| // See Sema::ActOnCXXMemberDeclarator for details. |
| DeclPtrTy ThisDecl = Actions.ActOnCXXMemberDeclarator(CurScope, AS, |
| DeclaratorInfo, |
| BitfieldSize.release(), |
| Init.release(), |
| Deleted); |
| if (ThisDecl) |
| DeclsInGroup.push_back(ThisDecl); |
| |
| if (DeclaratorInfo.isFunctionDeclarator() && |
| DeclaratorInfo.getDeclSpec().getStorageClassSpec() |
| != DeclSpec::SCS_typedef) { |
| // We just declared a member function. If this member function |
| // has any default arguments, we'll need to parse them later. |
| LateParsedMethodDeclaration *LateMethod = 0; |
| DeclaratorChunk::FunctionTypeInfo &FTI |
| = DeclaratorInfo.getTypeObject(0).Fun; |
| for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) { |
| if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) { |
| if (!LateMethod) { |
| // Push this method onto the stack of late-parsed method |
| // declarations. |
| getCurTopClassStack().MethodDecls.push_back( |
| LateParsedMethodDeclaration(ThisDecl)); |
| LateMethod = &getCurTopClassStack().MethodDecls.back(); |
| |
| // Add all of the parameters prior to this one (they don't |
| // have default arguments). |
| LateMethod->DefaultArgs.reserve(FTI.NumArgs); |
| for (unsigned I = 0; I < ParamIdx; ++I) |
| LateMethod->DefaultArgs.push_back( |
| LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param)); |
| } |
| |
| // Add this parameter to the list of parameters (it or may |
| // not have a default argument). |
| LateMethod->DefaultArgs.push_back( |
| LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param, |
| FTI.ArgInfo[ParamIdx].DefaultArgTokens)); |
| } |
| } |
| } |
| |
| // If we don't have a comma, it is either the end of the list (a ';') |
| // or an error, bail out. |
| if (Tok.isNot(tok::comma)) |
| break; |
| |
| // Consume the comma. |
| ConsumeToken(); |
| |
| // Parse the next declarator. |
| DeclaratorInfo.clear(); |
| BitfieldSize = 0; |
| Init = 0; |
| Deleted = false; |
| |
| // Attributes are only allowed on the second declarator. |
| if (Tok.is(tok::kw___attribute)) { |
| SourceLocation Loc; |
| AttributeList *AttrList = ParseAttributes(&Loc); |
| DeclaratorInfo.AddAttributes(AttrList, Loc); |
| } |
| |
| if (Tok.isNot(tok::colon)) |
| ParseDeclarator(DeclaratorInfo); |
| } |
| |
| if (Tok.is(tok::semi)) { |
| ConsumeToken(); |
| Actions.FinalizeDeclaratorGroup(CurScope, &DeclsInGroup[0], |
| DeclsInGroup.size()); |
| return; |
| } |
| |
| Diag(Tok, diag::err_expected_semi_decl_list); |
| // Skip to end of block or statement |
| SkipUntil(tok::r_brace, true, true); |
| if (Tok.is(tok::semi)) |
| ConsumeToken(); |
| return; |
| } |
| |
| /// ParseCXXMemberSpecification - Parse the class definition. |
| /// |
| /// member-specification: |
| /// member-declaration member-specification[opt] |
| /// access-specifier ':' member-specification[opt] |
| /// |
| void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, |
| unsigned TagType, DeclPtrTy TagDecl) { |
| assert((TagType == DeclSpec::TST_struct || |
| TagType == DeclSpec::TST_union || |
| TagType == DeclSpec::TST_class) && "Invalid TagType!"); |
| |
| PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions, |
| PP.getSourceManager(), |
| "parsing struct/union/class body"); |
| |
| SourceLocation LBraceLoc = ConsumeBrace(); |
| |
| if (!CurScope->isClassScope() && // Not about to define a nested class. |
| CurScope->isInCXXInlineMethodScope()) { |
| // We will define a local class of an inline method. |
| // Push a new LexedMethodsForTopClass for its inline methods. |
| PushTopClassStack(); |
| } |
| |
| // Enter a scope for the class. |
| ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); |
| |
| if (TagDecl) |
| Actions.ActOnTagStartDefinition(CurScope, TagDecl); |
| else { |
| SkipUntil(tok::r_brace, false, false); |
| return; |
| } |
| |
| // C++ 11p3: Members of a class defined with the keyword class are private |
| // by default. Members of a class defined with the keywords struct or union |
| // are public by default. |
| AccessSpecifier CurAS; |
| if (TagType == DeclSpec::TST_class) |
| CurAS = AS_private; |
| else |
| CurAS = AS_public; |
| |
| // While we still have something to read, read the member-declarations. |
| while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { |
| // Each iteration of this loop reads one member-declaration. |
| |
| // Check for extraneous top-level semicolon. |
| if (Tok.is(tok::semi)) { |
| Diag(Tok, diag::ext_extra_struct_semi); |
| ConsumeToken(); |
| continue; |
| } |
| |
| AccessSpecifier AS = getAccessSpecifierIfPresent(); |
| if (AS != AS_none) { |
| // Current token is a C++ access specifier. |
| CurAS = AS; |
| ConsumeToken(); |
| ExpectAndConsume(tok::colon, diag::err_expected_colon); |
| continue; |
| } |
| |
| // Parse all the comma separated declarators. |
| ParseCXXClassMemberDeclaration(CurAS); |
| } |
| |
| SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); |
| |
| AttributeList *AttrList = 0; |
| // If attributes exist after class contents, parse them. |
| if (Tok.is(tok::kw___attribute)) |
| AttrList = ParseAttributes(); // FIXME: where should I put them? |
| |
| Actions.ActOnFinishCXXMemberSpecification(CurScope, RecordLoc, TagDecl, |
| LBraceLoc, RBraceLoc); |
| |
| // C++ 9.2p2: Within the class member-specification, the class is regarded as |
| // complete within function bodies, default arguments, |
| // exception-specifications, and constructor ctor-initializers (including |
| // such things in nested classes). |
| // |
| // FIXME: Only function bodies and constructor ctor-initializers are |
| // parsed correctly, fix the rest. |
| if (!CurScope->getParent()->isClassScope()) { |
| // We are not inside a nested class. This class and its nested classes |
| // are complete and we can parse the delayed portions of method |
| // declarations and the lexed inline method definitions. |
| ParseLexedMethodDeclarations(); |
| ParseLexedMethodDefs(); |
| |
| // For a local class of inline method, pop the LexedMethodsForTopClass that |
| // was previously pushed. |
| |
| assert((CurScope->isInCXXInlineMethodScope() || |
| TopClassStacks.size() == 1) && |
| "MethodLexers not getting popped properly!"); |
| if (CurScope->isInCXXInlineMethodScope()) |
| PopTopClassStack(); |
| } |
| |
| // Leave the class scope. |
| ClassScope.Exit(); |
| |
| Actions.ActOnTagFinishDefinition(CurScope, TagDecl); |
| } |
| |
| /// ParseConstructorInitializer - Parse a C++ constructor initializer, |
| /// which explicitly initializes the members or base classes of a |
| /// class (C++ [class.base.init]). For example, the three initializers |
| /// after the ':' in the Derived constructor below: |
| /// |
| /// @code |
| /// class Base { }; |
| /// class Derived : Base { |
| /// int x; |
| /// float f; |
| /// public: |
| /// Derived(float f) : Base(), x(17), f(f) { } |
| /// }; |
| /// @endcode |
| /// |
| /// [C++] ctor-initializer: |
| /// ':' mem-initializer-list |
| /// |
| /// [C++] mem-initializer-list: |
| /// mem-initializer |
| /// mem-initializer , mem-initializer-list |
| void Parser::ParseConstructorInitializer(DeclPtrTy ConstructorDecl) { |
| assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); |
| |
| SourceLocation ColonLoc = ConsumeToken(); |
| |
| llvm::SmallVector<MemInitTy*, 4> MemInitializers; |
| |
| do { |
| MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); |
| if (!MemInit.isInvalid()) |
| MemInitializers.push_back(MemInit.get()); |
| |
| if (Tok.is(tok::comma)) |
| ConsumeToken(); |
| else if (Tok.is(tok::l_brace)) |
| break; |
| else { |
| // Skip over garbage, until we get to '{'. Don't eat the '{'. |
| SkipUntil(tok::l_brace, true, true); |
| break; |
| } |
| } while (true); |
| |
| Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, |
| &MemInitializers[0], MemInitializers.size()); |
| } |
| |
| /// ParseMemInitializer - Parse a C++ member initializer, which is |
| /// part of a constructor initializer that explicitly initializes one |
| /// member or base class (C++ [class.base.init]). See |
| /// ParseConstructorInitializer for an example. |
| /// |
| /// [C++] mem-initializer: |
| /// mem-initializer-id '(' expression-list[opt] ')' |
| /// |
| /// [C++] mem-initializer-id: |
| /// '::'[opt] nested-name-specifier[opt] class-name |
| /// identifier |
| Parser::MemInitResult Parser::ParseMemInitializer(DeclPtrTy ConstructorDecl) { |
| // FIXME: parse '::'[opt] nested-name-specifier[opt] |
| |
| if (Tok.isNot(tok::identifier)) { |
| Diag(Tok, diag::err_expected_member_or_base_name); |
| return true; |
| } |
| |
| // Get the identifier. This may be a member name or a class name, |
| // but we'll let the semantic analysis determine which it is. |
| IdentifierInfo *II = Tok.getIdentifierInfo(); |
| SourceLocation IdLoc = ConsumeToken(); |
| |
| // Parse the '('. |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(Tok, diag::err_expected_lparen); |
| return true; |
| } |
| SourceLocation LParenLoc = ConsumeParen(); |
| |
| // Parse the optional expression-list. |
| ExprVector ArgExprs(Actions); |
| CommaLocsTy CommaLocs; |
| if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) { |
| SkipUntil(tok::r_paren); |
| return true; |
| } |
| |
| SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| |
| return Actions.ActOnMemInitializer(ConstructorDecl, CurScope, II, IdLoc, |
| LParenLoc, ArgExprs.take(), |
| ArgExprs.size(), &CommaLocs[0], RParenLoc); |
| } |
| |
| /// ParseExceptionSpecification - Parse a C++ exception-specification |
| /// (C++ [except.spec]). |
| /// |
| /// exception-specification: |
| /// 'throw' '(' type-id-list [opt] ')' |
| /// [MS] 'throw' '(' '...' ')' |
| /// |
| /// type-id-list: |
| /// type-id |
| /// type-id-list ',' type-id |
| /// |
| bool Parser::ParseExceptionSpecification(SourceLocation &EndLoc) { |
| assert(Tok.is(tok::kw_throw) && "expected throw"); |
| |
| SourceLocation ThrowLoc = ConsumeToken(); |
| |
| if (!Tok.is(tok::l_paren)) { |
| return Diag(Tok, diag::err_expected_lparen_after) << "throw"; |
| } |
| SourceLocation LParenLoc = ConsumeParen(); |
| |
| // Parse throw(...), a Microsoft extension that means "this function |
| // can throw anything". |
| if (Tok.is(tok::ellipsis)) { |
| SourceLocation EllipsisLoc = ConsumeToken(); |
| if (!getLang().Microsoft) |
| Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec); |
| EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| return false; |
| } |
| |
| // Parse the sequence of type-ids. |
| while (Tok.isNot(tok::r_paren)) { |
| ParseTypeName(); |
| if (Tok.is(tok::comma)) |
| ConsumeToken(); |
| else |
| break; |
| } |
| |
| EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| return false; |
| } |