| //===--- 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/Basic/OperatorKinds.h" |
| #include "clang/Parse/Parser.h" |
| #include "clang/Parse/ParseDiagnostic.h" |
| #include "clang/Sema/DeclSpec.h" |
| #include "clang/Sema/Scope.h" |
| #include "clang/Sema/ParsedTemplate.h" |
| #include "clang/Sema/PrettyDeclStackTrace.h" |
| #include "RAIIObjectsForParser.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. If |
| /// there was an inline keyword, it has already been parsed. |
| /// |
| /// namespace-definition: [C++ 7.3: basic.namespace] |
| /// named-namespace-definition |
| /// unnamed-namespace-definition |
| /// |
| /// unnamed-namespace-definition: |
| /// 'inline'[opt] 'namespace' attributes[opt] '{' namespace-body '}' |
| /// |
| /// named-namespace-definition: |
| /// original-namespace-definition |
| /// extension-namespace-definition |
| /// |
| /// original-namespace-definition: |
| /// 'inline'[opt] 'namespace' identifier attributes[opt] |
| /// '{' namespace-body '}' |
| /// |
| /// extension-namespace-definition: |
| /// 'inline'[opt] 'namespace' original-namespace-name |
| /// '{' namespace-body '}' |
| /// |
| /// namespace-alias-definition: [C++ 7.3.2: namespace.alias] |
| /// 'namespace' identifier '=' qualified-namespace-specifier ';' |
| /// |
| Decl *Parser::ParseNamespace(unsigned Context, |
| SourceLocation &DeclEnd, |
| SourceLocation InlineLoc) { |
| assert(Tok.is(tok::kw_namespace) && "Not a namespace!"); |
| SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'. |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteNamespaceDecl(getCurScope()); |
| ConsumeCodeCompletionToken(); |
| } |
| |
| SourceLocation IdentLoc; |
| IdentifierInfo *Ident = 0; |
| |
| Token attrTok; |
| |
| if (Tok.is(tok::identifier)) { |
| Ident = Tok.getIdentifierInfo(); |
| IdentLoc = ConsumeToken(); // eat the identifier. |
| } |
| |
| // Read label attributes, if present. |
| AttributeList *AttrList = 0; |
| if (Tok.is(tok::kw___attribute)) { |
| attrTok = Tok; |
| |
| // FIXME: save these somewhere. |
| AttrList = ParseGNUAttributes(); |
| } |
| |
| if (Tok.is(tok::equal)) { |
| if (AttrList) |
| Diag(attrTok, diag::err_unexpected_namespace_attributes_alias); |
| if (InlineLoc.isValid()) |
| Diag(InlineLoc, diag::err_inline_namespace_alias) |
| << FixItHint::CreateRemoval(InlineLoc); |
| |
| 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 0; |
| } |
| |
| SourceLocation LBrace = ConsumeBrace(); |
| |
| if (getCurScope()->isClassScope() || getCurScope()->isTemplateParamScope() || |
| getCurScope()->isInObjcMethodScope() || getCurScope()->getBlockParent() || |
| getCurScope()->getFnParent()) { |
| Diag(LBrace, diag::err_namespace_nonnamespace_scope); |
| SkipUntil(tok::r_brace, false); |
| return 0; |
| } |
| |
| // If we're still good, complain about inline namespaces in non-C++0x now. |
| if (!getLang().CPlusPlus0x && InlineLoc.isValid()) |
| Diag(InlineLoc, diag::ext_inline_namespace); |
| |
| // Enter a scope for the namespace. |
| ParseScope NamespaceScope(this, Scope::DeclScope); |
| |
| Decl *NamespcDecl = |
| Actions.ActOnStartNamespaceDef(getCurScope(), InlineLoc, IdentLoc, Ident, |
| LBrace, AttrList); |
| |
| PrettyDeclStackTraceEntry CrashInfo(Actions, NamespcDecl, NamespaceLoc, |
| "parsing namespace"); |
| |
| while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { |
| CXX0XAttributeList Attr; |
| if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) |
| Attr = ParseCXX0XAttributes(); |
| if (getLang().Microsoft && Tok.is(tok::l_square)) |
| ParseMicrosoftAttributes(); |
| ParseExternalDeclaration(Attr); |
| } |
| |
| // 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. |
| /// |
| Decl *Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc, |
| SourceLocation AliasLoc, |
| IdentifierInfo *Alias, |
| SourceLocation &DeclEnd) { |
| assert(Tok.is(tok::equal) && "Not equal token"); |
| |
| ConsumeToken(); // eat the '='. |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteNamespaceAliasDecl(getCurScope()); |
| ConsumeCodeCompletionToken(); |
| } |
| |
| CXXScopeSpec SS; |
| // Parse (optional) nested-name-specifier. |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false); |
| |
| 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 0; |
| } |
| |
| // 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(getCurScope(), 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 |
| /// |
| Decl *Parser::ParseLinkage(ParsingDeclSpec &DS, unsigned Context) { |
| assert(Tok.is(tok::string_literal) && "Not a string literal!"); |
| llvm::SmallString<8> LangBuffer; |
| bool Invalid = false; |
| llvm::StringRef Lang = PP.getSpelling(Tok, LangBuffer, &Invalid); |
| if (Invalid) |
| return 0; |
| |
| SourceLocation Loc = ConsumeStringToken(); |
| |
| ParseScope LinkageScope(this, Scope::DeclScope); |
| Decl *LinkageSpec |
| = Actions.ActOnStartLinkageSpecification(getCurScope(), |
| /*FIXME: */SourceLocation(), |
| Loc, Lang, |
| Tok.is(tok::l_brace)? Tok.getLocation() |
| : SourceLocation()); |
| |
| CXX0XAttributeList Attr; |
| if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) |
| Attr = ParseCXX0XAttributes(); |
| |
| if (getLang().Microsoft && Tok.is(tok::l_square)) |
| ParseMicrosoftAttributes(); |
| |
| if (Tok.isNot(tok::l_brace)) { |
| DS.setExternInLinkageSpec(true); |
| ParseExternalDeclaration(Attr, &DS); |
| return Actions.ActOnFinishLinkageSpecification(getCurScope(), LinkageSpec, |
| SourceLocation()); |
| } |
| |
| DS.abort(); |
| |
| if (Attr.HasAttr) |
| Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) |
| << Attr.Range; |
| |
| SourceLocation LBrace = ConsumeBrace(); |
| while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) { |
| CXX0XAttributeList Attr; |
| if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) |
| Attr = ParseCXX0XAttributes(); |
| if (getLang().Microsoft && Tok.is(tok::l_square)) |
| ParseMicrosoftAttributes(); |
| ParseExternalDeclaration(Attr); |
| } |
| |
| SourceLocation RBrace = MatchRHSPunctuation(tok::r_brace, LBrace); |
| return Actions.ActOnFinishLinkageSpecification(getCurScope(), LinkageSpec, |
| RBrace); |
| } |
| |
| /// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or |
| /// using-directive. Assumes that current token is 'using'. |
| Decl *Parser::ParseUsingDirectiveOrDeclaration(unsigned Context, |
| const ParsedTemplateInfo &TemplateInfo, |
| SourceLocation &DeclEnd, |
| CXX0XAttributeList Attr) { |
| assert(Tok.is(tok::kw_using) && "Not using token"); |
| |
| // Eat 'using'. |
| SourceLocation UsingLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteUsing(getCurScope()); |
| ConsumeCodeCompletionToken(); |
| } |
| |
| // 'using namespace' means this is a using-directive. |
| if (Tok.is(tok::kw_namespace)) { |
| // Template parameters are always an error here. |
| if (TemplateInfo.Kind) { |
| SourceRange R = TemplateInfo.getSourceRange(); |
| Diag(UsingLoc, diag::err_templated_using_directive) |
| << R << FixItHint::CreateRemoval(R); |
| } |
| |
| return ParseUsingDirective(Context, UsingLoc, DeclEnd, Attr.AttrList); |
| } |
| |
| // Otherwise, it must be a using-declaration. |
| |
| // Using declarations can't have attributes. |
| if (Attr.HasAttr) |
| Diag(Attr.Range.getBegin(), diag::err_attributes_not_allowed) |
| << Attr.Range; |
| |
| return ParseUsingDeclaration(Context, TemplateInfo, 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] ; |
| /// |
| Decl *Parser::ParseUsingDirective(unsigned Context, |
| SourceLocation UsingLoc, |
| SourceLocation &DeclEnd, |
| AttributeList *Attr) { |
| assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token"); |
| |
| // Eat 'namespace'. |
| SourceLocation NamespcLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteUsingDirective(getCurScope()); |
| ConsumeCodeCompletionToken(); |
| } |
| |
| CXXScopeSpec SS; |
| // Parse (optional) nested-name-specifier. |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false); |
| |
| 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 0; |
| } |
| |
| // Parse identifier. |
| NamespcName = Tok.getIdentifierInfo(); |
| IdentLoc = ConsumeToken(); |
| |
| // Parse (optional) attributes (most likely GNU strong-using extension). |
| bool GNUAttr = false; |
| if (Tok.is(tok::kw___attribute)) { |
| GNUAttr = true; |
| Attr = addAttributeLists(Attr, ParseGNUAttributes()); |
| } |
| |
| // Eat ';'. |
| DeclEnd = Tok.getLocation(); |
| ExpectAndConsume(tok::semi, |
| GNUAttr ? diag::err_expected_semi_after_attribute_list |
| : diag::err_expected_semi_after_namespace_name, |
| "", tok::semi); |
| |
| return Actions.ActOnUsingDirective(getCurScope(), UsingLoc, NamespcLoc, SS, |
| IdentLoc, NamespcName, Attr); |
| } |
| |
| /// 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 |
| /// 'using' :: unqualified-id |
| /// |
| Decl *Parser::ParseUsingDeclaration(unsigned Context, |
| const ParsedTemplateInfo &TemplateInfo, |
| SourceLocation UsingLoc, |
| SourceLocation &DeclEnd, |
| AccessSpecifier AS) { |
| CXXScopeSpec SS; |
| SourceLocation TypenameLoc; |
| bool IsTypeName; |
| |
| // TODO: in C++0x, if we have template parameters this must be a |
| // template alias: |
| // template <...> using id = type; |
| |
| // Ignore optional 'typename'. |
| // FIXME: This is wrong; we should parse this as a typename-specifier. |
| if (Tok.is(tok::kw_typename)) { |
| TypenameLoc = Tok.getLocation(); |
| ConsumeToken(); |
| IsTypeName = true; |
| } |
| else |
| IsTypeName = false; |
| |
| // Parse nested-name-specifier. |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false); |
| |
| // Check nested-name specifier. |
| if (SS.isInvalid()) { |
| SkipUntil(tok::semi); |
| return 0; |
| } |
| |
| // Parse the unqualified-id. We allow parsing of both constructor and |
| // destructor names and allow the action module to diagnose any semantic |
| // errors. |
| UnqualifiedId Name; |
| if (ParseUnqualifiedId(SS, |
| /*EnteringContext=*/false, |
| /*AllowDestructorName=*/true, |
| /*AllowConstructorName=*/true, |
| ParsedType(), |
| Name)) { |
| SkipUntil(tok::semi); |
| return 0; |
| } |
| |
| // Parse (optional) attributes (most likely GNU strong-using extension). |
| AttributeList *AttrList = 0; |
| if (Tok.is(tok::kw___attribute)) |
| AttrList = ParseGNUAttributes(); |
| |
| // Eat ';'. |
| DeclEnd = Tok.getLocation(); |
| ExpectAndConsume(tok::semi, diag::err_expected_semi_after, |
| AttrList ? "attributes list" : "using declaration", |
| tok::semi); |
| |
| // Diagnose an attempt to declare a templated using-declaration. |
| if (TemplateInfo.Kind) { |
| SourceRange R = TemplateInfo.getSourceRange(); |
| Diag(UsingLoc, diag::err_templated_using_declaration) |
| << R << FixItHint::CreateRemoval(R); |
| |
| // Unfortunately, we have to bail out instead of recovering by |
| // ignoring the parameters, just in case the nested name specifier |
| // depends on the parameters. |
| return 0; |
| } |
| |
| return Actions.ActOnUsingDeclaration(getCurScope(), AS, true, UsingLoc, SS, |
| Name, AttrList, IsTypeName, TypenameLoc); |
| } |
| |
| /// ParseStaticAssertDeclaration - Parse C++0x static_assert-declaratoion. |
| /// |
| /// static_assert-declaration: |
| /// static_assert ( constant-expression , string-literal ) ; |
| /// |
| Decl *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 0; |
| } |
| |
| SourceLocation LParenLoc = ConsumeParen(); |
| |
| ExprResult AssertExpr(ParseConstantExpression()); |
| if (AssertExpr.isInvalid()) { |
| SkipUntil(tok::semi); |
| return 0; |
| } |
| |
| if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi)) |
| return 0; |
| |
| if (Tok.isNot(tok::string_literal)) { |
| Diag(Tok, diag::err_expected_string_literal); |
| SkipUntil(tok::semi); |
| return 0; |
| } |
| |
| ExprResult AssertMessage(ParseStringLiteralExpression()); |
| if (AssertMessage.isInvalid()) |
| return 0; |
| |
| MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| |
| DeclEnd = Tok.getLocation(); |
| ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert); |
| |
| return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, |
| AssertExpr.take(), |
| AssertMessage.take()); |
| } |
| |
| /// ParseDecltypeSpecifier - Parse a C++0x decltype specifier. |
| /// |
| /// 'decltype' ( expression ) |
| /// |
| void Parser::ParseDecltypeSpecifier(DeclSpec &DS) { |
| assert(Tok.is(tok::kw_decltype) && "Not a decltype specifier"); |
| |
| SourceLocation StartLoc = ConsumeToken(); |
| SourceLocation LParenLoc = Tok.getLocation(); |
| |
| if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after, |
| "decltype")) { |
| SkipUntil(tok::r_paren); |
| return; |
| } |
| |
| // Parse the expression |
| |
| // C++0x [dcl.type.simple]p4: |
| // The operand of the decltype specifier is an unevaluated operand. |
| EnterExpressionEvaluationContext Unevaluated(Actions, |
| Sema::Unevaluated); |
| ExprResult Result = ParseExpression(); |
| if (Result.isInvalid()) { |
| SkipUntil(tok::r_paren); |
| return; |
| } |
| |
| // Match the ')' |
| SourceLocation RParenLoc; |
| if (Tok.is(tok::r_paren)) |
| RParenLoc = ConsumeParen(); |
| else |
| MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| |
| if (RParenLoc.isInvalid()) |
| return; |
| |
| const char *PrevSpec = 0; |
| unsigned DiagID; |
| // Check for duplicate type specifiers (e.g. "int decltype(a)"). |
| if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec, |
| DiagID, Result.release())) |
| Diag(StartLoc, DiagID) << PrevSpec; |
| } |
| |
| /// 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, |
| 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 || |
| TemplateId->Kind == TNK_Dependent_template_name) { |
| AnnotateTemplateIdTokenAsType(SS); |
| |
| assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); |
| ParsedType Type = getTypeAnnotation(Tok); |
| 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; |
| } |
| |
| IdentifierInfo *Id = Tok.getIdentifierInfo(); |
| SourceLocation IdLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::less)) { |
| // It looks the user intended to write a template-id here, but the |
| // template-name was wrong. Try to fix that. |
| TemplateNameKind TNK = TNK_Type_template; |
| TemplateTy Template; |
| if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, getCurScope(), |
| SS, Template, TNK)) { |
| Diag(IdLoc, diag::err_unknown_template_name) |
| << Id; |
| } |
| |
| if (!Template) |
| return true; |
| |
| // Form the template name |
| UnqualifiedId TemplateName; |
| TemplateName.setIdentifier(Id, IdLoc); |
| |
| // Parse the full template-id, then turn it into a type. |
| if (AnnotateTemplateIdToken(Template, TNK, SS, TemplateName, |
| SourceLocation(), true)) |
| return true; |
| if (TNK == TNK_Dependent_template_name) |
| AnnotateTemplateIdTokenAsType(SS); |
| |
| // If we didn't end up with a typename token, there's nothing more we |
| // can do. |
| if (Tok.isNot(tok::annot_typename)) |
| return true; |
| |
| // Retrieve the type from the annotation token, consume that token, and |
| // return. |
| EndLocation = Tok.getAnnotationEndLoc(); |
| ParsedType Type = getTypeAnnotation(Tok); |
| ConsumeToken(); |
| return Type; |
| } |
| |
| // We have an identifier; check whether it is actually a type. |
| ParsedType Type = Actions.getTypeName(*Id, IdLoc, getCurScope(), SS, true); |
| if (!Type) { |
| Diag(IdLoc, diag::err_expected_class_name); |
| return true; |
| } |
| |
| // Consume the identifier. |
| EndLocation = IdLoc; |
| |
| // Fake up a Declarator to use with ActOnTypeName. |
| DeclSpec DS; |
| DS.SetRangeStart(IdLoc); |
| DS.SetRangeEnd(EndLocation); |
| DS.getTypeSpecScope() = *SS; |
| |
| const char *PrevSpec = 0; |
| unsigned DiagID; |
| DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type); |
| |
| Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); |
| return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| } |
| |
| /// 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. If SuppressDeclarations is true, we do know. |
| /// |
| /// 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, |
| const ParsedTemplateInfo &TemplateInfo, |
| AccessSpecifier AS, bool SuppressDeclarations){ |
| 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; |
| } |
| |
| if (Tok.is(tok::code_completion)) { |
| // Code completion for a struct, class, or union name. |
| Actions.CodeCompleteTag(getCurScope(), TagType); |
| ConsumeCodeCompletionToken(); |
| } |
| |
| // C++03 [temp.explicit] 14.7.2/8: |
| // The usual access checking rules do not apply to names used to specify |
| // explicit instantiations. |
| // |
| // As an extension we do not perform access checking on the names used to |
| // specify explicit specializations either. This is important to allow |
| // specializing traits classes for private types. |
| bool SuppressingAccessChecks = false; |
| if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation || |
| TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization) { |
| Actions.ActOnStartSuppressingAccessChecks(); |
| SuppressingAccessChecks = true; |
| } |
| |
| AttributeList *AttrList = 0; |
| // If attributes exist after tag, parse them. |
| if (Tok.is(tok::kw___attribute)) |
| AttrList = ParseGNUAttributes(); |
| |
| // If declspecs exist after tag, parse them. |
| while (Tok.is(tok::kw___declspec)) |
| AttrList = ParseMicrosoftDeclSpec(AttrList); |
| |
| // If C++0x attributes exist here, parse them. |
| // FIXME: Are we consistent with the ordering of parsing of different |
| // styles of attributes? |
| if (isCXX0XAttributeSpecifier()) |
| AttrList = addAttributeLists(AttrList, ParseCXX0XAttributes().AttrList); |
| |
| if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_pod)) { |
| // GNU libstdc++ 4.2 uses __is_pod as the name of a struct template, but |
| // __is_pod is a keyword in GCC >= 4.3. Therefore, when we see the |
| // token sequence "struct __is_pod", make __is_pod into a normal |
| // identifier rather than a keyword, to allow libstdc++ 4.2 to work |
| // properly. |
| Tok.getIdentifierInfo()->RevertTokenIDToIdentifier(); |
| Tok.setKind(tok::identifier); |
| } |
| |
| if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_empty)) { |
| // GNU libstdc++ 4.2 uses __is_empty as the name of a struct template, but |
| // __is_empty is a keyword in GCC >= 4.3. Therefore, when we see the |
| // token sequence "struct __is_empty", make __is_empty into a normal |
| // identifier rather than a keyword, to allow libstdc++ 4.2 to work |
| // properly. |
| Tok.getIdentifierInfo()->RevertTokenIDToIdentifier(); |
| Tok.setKind(tok::identifier); |
| } |
| |
| // Parse the (optional) nested-name-specifier. |
| CXXScopeSpec &SS = DS.getTypeSpecScope(); |
| if (getLang().CPlusPlus) { |
| // "FOO : BAR" is not a potential typo for "FOO::BAR". |
| ColonProtectionRAIIObject X(*this); |
| |
| if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), true)) |
| DS.SetTypeSpecError(); |
| if (SS.isSet()) |
| if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) |
| Diag(Tok, diag::err_expected_ident); |
| } |
| |
| TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; |
| |
| // 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(); |
| |
| if (Tok.is(tok::less) && getLang().CPlusPlus) { |
| // The name was supposed to refer to a template, but didn't. |
| // Eat the template argument list and try to continue parsing this as |
| // a class (or template thereof). |
| TemplateArgList TemplateArgs; |
| SourceLocation LAngleLoc, RAngleLoc; |
| if (ParseTemplateIdAfterTemplateName(TemplateTy(), NameLoc, &SS, |
| true, LAngleLoc, |
| TemplateArgs, RAngleLoc)) { |
| // We couldn't parse the template argument list at all, so don't |
| // try to give any location information for the list. |
| LAngleLoc = RAngleLoc = SourceLocation(); |
| } |
| |
| Diag(NameLoc, diag::err_explicit_spec_non_template) |
| << (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) |
| << (TagType == DeclSpec::TST_class? 0 |
| : TagType == DeclSpec::TST_struct? 1 |
| : 2) |
| << Name |
| << SourceRange(LAngleLoc, RAngleLoc); |
| |
| // Strip off the last template parameter list if it was empty, since |
| // we've removed its template argument list. |
| if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) { |
| if (TemplateParams && TemplateParams->size() > 1) { |
| TemplateParams->pop_back(); |
| } else { |
| TemplateParams = 0; |
| const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind |
| = ParsedTemplateInfo::NonTemplate; |
| } |
| } else if (TemplateInfo.Kind |
| == ParsedTemplateInfo::ExplicitInstantiation) { |
| // Pretend this is just a forward declaration. |
| TemplateParams = 0; |
| const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind |
| = ParsedTemplateInfo::NonTemplate; |
| const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc |
| = SourceLocation(); |
| const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc |
| = SourceLocation(); |
| } |
| } |
| } 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(); |
| if (SuppressingAccessChecks) |
| Actions.ActOnStopSuppressingAccessChecks(); |
| |
| return; |
| } |
| } |
| |
| // As soon as we're finished parsing the class's template-id, turn access |
| // checking back on. |
| if (SuppressingAccessChecks) |
| Actions.ActOnStopSuppressingAccessChecks(); |
| |
| // There are four options here. If we have 'struct foo;', then this |
| // is either a forward declaration or a friend declaration, which |
| // have to be treated differently. If we have 'struct foo {...' or |
| // 'struct foo :...' then this is a definition. Otherwise we have |
| // something like 'struct foo xyz', a reference. |
| // However, in some contexts, things look like declarations but are just |
| // references, e.g. |
| // new struct s; |
| // or |
| // &T::operator struct s; |
| // For these, SuppressDeclarations is true. |
| Sema::TagUseKind TUK; |
| if (SuppressDeclarations) |
| TUK = Sema::TUK_Reference; |
| else if (Tok.is(tok::l_brace) || (getLang().CPlusPlus && Tok.is(tok::colon))){ |
| if (DS.isFriendSpecified()) { |
| // C++ [class.friend]p2: |
| // A class shall not be defined in a friend declaration. |
| Diag(Tok.getLocation(), diag::err_friend_decl_defines_class) |
| << SourceRange(DS.getFriendSpecLoc()); |
| |
| // Skip everything up to the semicolon, so that this looks like a proper |
| // friend class (or template thereof) declaration. |
| SkipUntil(tok::semi, true, true); |
| TUK = Sema::TUK_Friend; |
| } else { |
| // Okay, this is a class definition. |
| TUK = Sema::TUK_Definition; |
| } |
| } else if (Tok.is(tok::semi)) |
| TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration; |
| else |
| TUK = Sema::TUK_Reference; |
| |
| if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error || |
| TUK != Sema::TUK_Definition)) { |
| if (DS.getTypeSpecType() != DeclSpec::TST_error) { |
| // We have a declaration or reference to an anonymous class. |
| Diag(StartLoc, diag::err_anon_type_definition) |
| << DeclSpec::getSpecifierName(TagType); |
| } |
| |
| SkipUntil(tok::comma, true); |
| |
| if (TemplateId) |
| TemplateId->Destroy(); |
| return; |
| } |
| |
| // Create the tag portion of the class or class template. |
| DeclResult TagOrTempResult = true; // invalid |
| TypeResult TypeResult = true; // invalid |
| |
| bool Owned = false; |
| if (TemplateId) { |
| // Explicit specialization, class template partial specialization, |
| // or explicit instantiation. |
| ASTTemplateArgsPtr TemplateArgsPtr(Actions, |
| TemplateId->getTemplateArgs(), |
| TemplateId->NumArgs); |
| if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && |
| TUK == Sema::TUK_Declaration) { |
| // This is an explicit instantiation of a class template. |
| TagOrTempResult |
| = Actions.ActOnExplicitInstantiation(getCurScope(), |
| TemplateInfo.ExternLoc, |
| TemplateInfo.TemplateLoc, |
| TagType, |
| StartLoc, |
| SS, |
| TemplateId->Template, |
| TemplateId->TemplateNameLoc, |
| TemplateId->LAngleLoc, |
| TemplateArgsPtr, |
| TemplateId->RAngleLoc, |
| AttrList); |
| |
| // Friend template-ids are treated as references unless |
| // they have template headers, in which case they're ill-formed |
| // (FIXME: "template <class T> friend class A<T>::B<int>;"). |
| // We diagnose this error in ActOnClassTemplateSpecialization. |
| } else if (TUK == Sema::TUK_Reference || |
| (TUK == Sema::TUK_Friend && |
| TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) { |
| TypeResult |
| = Actions.ActOnTemplateIdType(TemplateId->Template, |
| TemplateId->TemplateNameLoc, |
| TemplateId->LAngleLoc, |
| TemplateArgsPtr, |
| TemplateId->RAngleLoc); |
| |
| TypeResult = Actions.ActOnTagTemplateIdType(SS, TypeResult, TUK, |
| TagType, StartLoc); |
| } else { |
| // This is an explicit specialization or a class template |
| // partial specialization. |
| TemplateParameterLists FakedParamLists; |
| |
| if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { |
| // This looks like an explicit instantiation, because we have |
| // something like |
| // |
| // template class Foo<X> |
| // |
| // but it actually has a definition. Most likely, this was |
| // meant to be an explicit specialization, but the user forgot |
| // the '<>' after 'template'. |
| assert(TUK == Sema::TUK_Definition && "Expected a definition here"); |
| |
| SourceLocation LAngleLoc |
| = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc); |
| Diag(TemplateId->TemplateNameLoc, |
| diag::err_explicit_instantiation_with_definition) |
| << SourceRange(TemplateInfo.TemplateLoc) |
| << FixItHint::CreateInsertion(LAngleLoc, "<>"); |
| |
| // Create a fake template parameter list that contains only |
| // "template<>", so that we treat this construct as a class |
| // template specialization. |
| FakedParamLists.push_back( |
| Actions.ActOnTemplateParameterList(0, SourceLocation(), |
| TemplateInfo.TemplateLoc, |
| LAngleLoc, |
| 0, 0, |
| LAngleLoc)); |
| TemplateParams = &FakedParamLists; |
| } |
| |
| // Build the class template specialization. |
| TagOrTempResult |
| = Actions.ActOnClassTemplateSpecialization(getCurScope(), TagType, TUK, |
| StartLoc, SS, |
| TemplateId->Template, |
| TemplateId->TemplateNameLoc, |
| TemplateId->LAngleLoc, |
| TemplateArgsPtr, |
| TemplateId->RAngleLoc, |
| AttrList, |
| MultiTemplateParamsArg(Actions, |
| TemplateParams? &(*TemplateParams)[0] : 0, |
| TemplateParams? TemplateParams->size() : 0)); |
| } |
| TemplateId->Destroy(); |
| } else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && |
| TUK == Sema::TUK_Declaration) { |
| // Explicit instantiation of a member of a class template |
| // specialization, e.g., |
| // |
| // template struct Outer<int>::Inner; |
| // |
| TagOrTempResult |
| = Actions.ActOnExplicitInstantiation(getCurScope(), |
| TemplateInfo.ExternLoc, |
| TemplateInfo.TemplateLoc, |
| TagType, StartLoc, SS, Name, |
| NameLoc, AttrList); |
| } else if (TUK == Sema::TUK_Friend && |
| TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { |
| TagOrTempResult = |
| Actions.ActOnTemplatedFriendTag(getCurScope(), DS.getFriendSpecLoc(), |
| TagType, StartLoc, SS, |
| Name, NameLoc, AttrList, |
| MultiTemplateParamsArg(Actions, |
| TemplateParams? &(*TemplateParams)[0] : 0, |
| TemplateParams? TemplateParams->size() : 0)); |
| } else { |
| if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && |
| TUK == Sema::TUK_Definition) { |
| // FIXME: Diagnose this particular error. |
| } |
| |
| bool IsDependent = false; |
| |
| // Don't pass down template parameter lists if this is just a tag |
| // reference. For example, we don't need the template parameters here: |
| // template <class T> class A *makeA(T t); |
| MultiTemplateParamsArg TParams; |
| if (TUK != Sema::TUK_Reference && TemplateParams) |
| TParams = |
| MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size()); |
| |
| // Declaration or definition of a class type |
| TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc, |
| SS, Name, NameLoc, AttrList, AS, |
| TParams, Owned, IsDependent, false, |
| clang::TypeResult()); |
| |
| // If ActOnTag said the type was dependent, try again with the |
| // less common call. |
| if (IsDependent) { |
| assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend); |
| TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK, |
| SS, Name, StartLoc, NameLoc); |
| } |
| } |
| |
| // If there is a body, parse it and inform the actions module. |
| if (TUK == Sema::TUK_Definition) { |
| assert(Tok.is(tok::l_brace) || |
| (getLang().CPlusPlus && Tok.is(tok::colon))); |
| if (getLang().CPlusPlus) |
| ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get()); |
| else |
| ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); |
| } |
| |
| // FIXME: The DeclSpec should keep the locations of both the keyword and the |
| // name (if there is one). |
| SourceLocation TSTLoc = NameLoc.isValid()? NameLoc : StartLoc; |
| |
| const char *PrevSpec = 0; |
| unsigned DiagID; |
| bool Result; |
| if (!TypeResult.isInvalid()) { |
| Result = DS.SetTypeSpecType(DeclSpec::TST_typename, TSTLoc, |
| PrevSpec, DiagID, TypeResult.get()); |
| } else if (!TagOrTempResult.isInvalid()) { |
| Result = DS.SetTypeSpecType(TagType, TSTLoc, PrevSpec, DiagID, |
| TagOrTempResult.get(), Owned); |
| } else { |
| DS.SetTypeSpecError(); |
| return; |
| } |
| |
| if (Result) |
| Diag(StartLoc, DiagID) << PrevSpec; |
| |
| // At this point, we've successfully parsed a class-specifier in 'definition' |
| // form (e.g. "struct foo { int x; }". While we could just return here, we're |
| // going to look at what comes after it to improve error recovery. If an |
| // impossible token occurs next, we assume that the programmer forgot a ; at |
| // the end of the declaration and recover that way. |
| // |
| // This switch enumerates the valid "follow" set for definition. |
| if (TUK == Sema::TUK_Definition) { |
| bool ExpectedSemi = true; |
| switch (Tok.getKind()) { |
| default: break; |
| case tok::semi: // struct foo {...} ; |
| case tok::star: // struct foo {...} * P; |
| case tok::amp: // struct foo {...} & R = ... |
| case tok::identifier: // struct foo {...} V ; |
| case tok::r_paren: //(struct foo {...} ) {4} |
| case tok::annot_cxxscope: // struct foo {...} a:: b; |
| case tok::annot_typename: // struct foo {...} a ::b; |
| case tok::annot_template_id: // struct foo {...} a<int> ::b; |
| case tok::l_paren: // struct foo {...} ( x); |
| case tok::comma: // __builtin_offsetof(struct foo{...} , |
| ExpectedSemi = false; |
| break; |
| // Type qualifiers |
| case tok::kw_const: // struct foo {...} const x; |
| case tok::kw_volatile: // struct foo {...} volatile x; |
| case tok::kw_restrict: // struct foo {...} restrict x; |
| case tok::kw_inline: // struct foo {...} inline foo() {}; |
| // Storage-class specifiers |
| case tok::kw_static: // struct foo {...} static x; |
| case tok::kw_extern: // struct foo {...} extern x; |
| case tok::kw_typedef: // struct foo {...} typedef x; |
| case tok::kw_register: // struct foo {...} register x; |
| case tok::kw_auto: // struct foo {...} auto x; |
| case tok::kw_mutable: // struct foo {...} mutable x; |
| // As shown above, type qualifiers and storage class specifiers absolutely |
| // can occur after class specifiers according to the grammar. However, |
| // almost noone actually writes code like this. If we see one of these, |
| // it is much more likely that someone missed a semi colon and the |
| // type/storage class specifier we're seeing is part of the *next* |
| // intended declaration, as in: |
| // |
| // struct foo { ... } |
| // typedef int X; |
| // |
| // We'd really like to emit a missing semicolon error instead of emitting |
| // an error on the 'int' saying that you can't have two type specifiers in |
| // the same declaration of X. Because of this, we look ahead past this |
| // token to see if it's a type specifier. If so, we know the code is |
| // otherwise invalid, so we can produce the expected semi error. |
| if (!isKnownToBeTypeSpecifier(NextToken())) |
| ExpectedSemi = false; |
| break; |
| |
| case tok::r_brace: // struct bar { struct foo {...} } |
| // Missing ';' at end of struct is accepted as an extension in C mode. |
| if (!getLang().CPlusPlus) |
| ExpectedSemi = false; |
| break; |
| } |
| |
| if (ExpectedSemi) { |
| ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl, |
| TagType == DeclSpec::TST_class ? "class" |
| : TagType == DeclSpec::TST_struct? "struct" : "union"); |
| // Push this token back into the preprocessor and change our current token |
| // to ';' so that the rest of the code recovers as though there were an |
| // ';' after the definition. |
| PP.EnterToken(Tok); |
| Tok.setKind(tok::semi); |
| } |
| } |
| } |
| |
| /// 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(Decl *ClassDecl) { |
| assert(Tok.is(tok::colon) && "Not a base clause"); |
| ConsumeToken(); |
| |
| // Build up an array of parsed base specifiers. |
| llvm::SmallVector<CXXBaseSpecifier *, 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.data(), 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(Decl *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 != AS_none) |
| 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) |
| << FixItHint::CreateRemoval(VirtualLoc); |
| } |
| |
| IsVirtual = true; |
| } |
| |
| // Parse optional '::' and optional nested-name-specifier. |
| CXXScopeSpec SS; |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); |
| |
| // 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; |
| } |
| } |
| |
| void Parser::HandleMemberFunctionDefaultArgs(Declarator& DeclaratorInfo, |
| Decl *ThisDecl) { |
| // 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. |
| LateMethod = new LateParsedMethodDeclaration(this, ThisDecl); |
| getCurrentClass().LateParsedDeclarations.push_back(LateMethod); |
| LateMethod->TemplateScope = getCurScope()->isTemplateParamScope(); |
| |
| // 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[I].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)); |
| } |
| } |
| } |
| |
| /// 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, |
| const ParsedTemplateInfo &TemplateInfo, |
| ParsingDeclRAIIObject *TemplateDiags) { |
| // Access declarations. |
| if (!TemplateInfo.Kind && |
| (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) && |
| !TryAnnotateCXXScopeToken() && |
| Tok.is(tok::annot_cxxscope)) { |
| bool isAccessDecl = false; |
| if (NextToken().is(tok::identifier)) |
| isAccessDecl = GetLookAheadToken(2).is(tok::semi); |
| else |
| isAccessDecl = NextToken().is(tok::kw_operator); |
| |
| if (isAccessDecl) { |
| // Collect the scope specifier token we annotated earlier. |
| CXXScopeSpec SS; |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false); |
| |
| // Try to parse an unqualified-id. |
| UnqualifiedId Name; |
| if (ParseUnqualifiedId(SS, false, true, true, ParsedType(), Name)) { |
| SkipUntil(tok::semi); |
| return; |
| } |
| |
| // TODO: recover from mistakenly-qualified operator declarations. |
| if (ExpectAndConsume(tok::semi, |
| diag::err_expected_semi_after, |
| "access declaration", |
| tok::semi)) |
| return; |
| |
| Actions.ActOnUsingDeclaration(getCurScope(), AS, |
| false, SourceLocation(), |
| SS, Name, |
| /* AttrList */ 0, |
| /* IsTypeName */ false, |
| SourceLocation()); |
| return; |
| } |
| } |
| |
| // static_assert-declaration |
| if (Tok.is(tok::kw_static_assert)) { |
| // FIXME: Check for templates |
| SourceLocation DeclEnd; |
| ParseStaticAssertDeclaration(DeclEnd); |
| return; |
| } |
| |
| if (Tok.is(tok::kw_template)) { |
| assert(!TemplateInfo.TemplateParams && |
| "Nested template improperly parsed?"); |
| SourceLocation DeclEnd; |
| ParseDeclarationStartingWithTemplate(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, TemplateInfo, TemplateDiags); |
| } |
| |
| // Don't parse FOO:BAR as if it were a typo for FOO::BAR, in this context it |
| // is a bitfield. |
| ColonProtectionRAIIObject X(*this); |
| |
| CXX0XAttributeList AttrList; |
| // Optional C++0x attribute-specifier |
| if (getLang().CPlusPlus0x && isCXX0XAttributeSpecifier()) |
| AttrList = ParseCXX0XAttributes(); |
| if (getLang().Microsoft && Tok.is(tok::l_square)) |
| ParseMicrosoftAttributes(); |
| |
| if (Tok.is(tok::kw_using)) { |
| // FIXME: Check for template aliases |
| |
| if (AttrList.HasAttr) |
| Diag(AttrList.Range.getBegin(), diag::err_attributes_not_allowed) |
| << AttrList.Range; |
| |
| // Eat 'using'. |
| SourceLocation UsingLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::kw_namespace)) { |
| Diag(UsingLoc, diag::err_using_namespace_in_class); |
| SkipUntil(tok::semi, true, true); |
| } else { |
| SourceLocation DeclEnd; |
| // Otherwise, it must be using-declaration. |
| ParseUsingDeclaration(Declarator::MemberContext, TemplateInfo, |
| UsingLoc, DeclEnd, AS); |
| } |
| return; |
| } |
| |
| SourceLocation DSStart = Tok.getLocation(); |
| // decl-specifier-seq: |
| // Parse the common declaration-specifiers piece. |
| ParsingDeclSpec DS(*this, TemplateDiags); |
| DS.AddAttributes(AttrList.AttrList); |
| ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class); |
| |
| MultiTemplateParamsArg TemplateParams(Actions, |
| TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0, |
| TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); |
| |
| if (Tok.is(tok::semi)) { |
| ConsumeToken(); |
| Decl *TheDecl = |
| Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS); |
| DS.complete(TheDecl); |
| return; |
| } |
| |
| ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); |
| |
| if (Tok.isNot(tok::colon)) { |
| // Don't parse FOO:BAR as if it were a typo for FOO::BAR. |
| ColonProtectionRAIIObject X(*this); |
| |
| // 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; |
| } |
| |
| // If attributes exist after the declarator, but before an '{', parse them. |
| if (Tok.is(tok::kw___attribute)) { |
| SourceLocation Loc; |
| AttributeList *AttrList = ParseGNUAttributes(&Loc); |
| DeclaratorInfo.AddAttributes(AttrList, Loc); |
| } |
| |
| // function-definition: |
| if (Tok.is(tok::l_brace) |
| || (DeclaratorInfo.isFunctionDeclarator() && |
| (Tok.is(tok::colon) || Tok.is(tok::kw_try)))) { |
| 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, TemplateInfo); |
| return; |
| } |
| } |
| |
| // member-declarator-list: |
| // member-declarator |
| // member-declarator-list ',' member-declarator |
| |
| llvm::SmallVector<Decl *, 8> DeclsInGroup; |
| ExprResult BitfieldSize; |
| ExprResult Init; |
| 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 (Tok.is(tok::kw_delete)) { |
| if (!getLang().CPlusPlus0x) |
| Diag(Tok, diag::warn_deleted_function_accepted_as_extension); |
| ConsumeToken(); |
| Deleted = true; |
| } else { |
| Init = ParseInitializer(); |
| if (Init.isInvalid()) |
| SkipUntil(tok::comma, true, true); |
| } |
| } |
| |
| // If a simple-asm-expr is present, parse it. |
| if (Tok.is(tok::kw_asm)) { |
| SourceLocation Loc; |
| ExprResult AsmLabel(ParseSimpleAsm(&Loc)); |
| if (AsmLabel.isInvalid()) |
| SkipUntil(tok::comma, true, true); |
| |
| DeclaratorInfo.setAsmLabel(AsmLabel.release()); |
| DeclaratorInfo.SetRangeEnd(Loc); |
| } |
| |
| // If attributes exist after the declarator, parse them. |
| if (Tok.is(tok::kw___attribute)) { |
| SourceLocation Loc; |
| AttributeList *AttrList = ParseGNUAttributes(&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. |
| |
| Decl *ThisDecl = 0; |
| if (DS.isFriendSpecified()) { |
| // TODO: handle initializers, bitfields, 'delete' |
| ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo, |
| /*IsDefinition*/ false, |
| move(TemplateParams)); |
| } else { |
| ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, |
| DeclaratorInfo, |
| move(TemplateParams), |
| BitfieldSize.release(), |
| Init.release(), |
| /*IsDefinition*/Deleted, |
| Deleted); |
| } |
| if (ThisDecl) |
| DeclsInGroup.push_back(ThisDecl); |
| |
| if (DeclaratorInfo.isFunctionDeclarator() && |
| DeclaratorInfo.getDeclSpec().getStorageClassSpec() |
| != DeclSpec::SCS_typedef) { |
| HandleMemberFunctionDefaultArgs(DeclaratorInfo, ThisDecl); |
| } |
| |
| DeclaratorInfo.complete(ThisDecl); |
| |
| // 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 = ParseGNUAttributes(&Loc); |
| DeclaratorInfo.AddAttributes(AttrList, Loc); |
| } |
| |
| if (Tok.isNot(tok::colon)) |
| ParseDeclarator(DeclaratorInfo); |
| } |
| |
| if (ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) { |
| // Skip to end of block or statement. |
| SkipUntil(tok::r_brace, true, true); |
| // If we stopped at a ';', eat it. |
| if (Tok.is(tok::semi)) ConsumeToken(); |
| return; |
| } |
| |
| Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup.data(), |
| DeclsInGroup.size()); |
| } |
| |
| /// ParseCXXMemberSpecification - Parse the class definition. |
| /// |
| /// member-specification: |
| /// member-declaration member-specification[opt] |
| /// access-specifier ':' member-specification[opt] |
| /// |
| void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, |
| unsigned TagType, Decl *TagDecl) { |
| assert((TagType == DeclSpec::TST_struct || |
| TagType == DeclSpec::TST_union || |
| TagType == DeclSpec::TST_class) && "Invalid TagType!"); |
| |
| PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc, |
| "parsing struct/union/class body"); |
| |
| // Determine whether this is a non-nested class. Note that local |
| // classes are *not* considered to be nested classes. |
| bool NonNestedClass = true; |
| if (!ClassStack.empty()) { |
| for (const Scope *S = getCurScope(); S; S = S->getParent()) { |
| if (S->isClassScope()) { |
| // We're inside a class scope, so this is a nested class. |
| NonNestedClass = false; |
| break; |
| } |
| |
| if ((S->getFlags() & Scope::FnScope)) { |
| // If we're in a function or function template declared in the |
| // body of a class, then this is a local class rather than a |
| // nested class. |
| const Scope *Parent = S->getParent(); |
| if (Parent->isTemplateParamScope()) |
| Parent = Parent->getParent(); |
| if (Parent->isClassScope()) |
| break; |
| } |
| } |
| } |
| |
| // Enter a scope for the class. |
| ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope); |
| |
| // Note that we are parsing a new (potentially-nested) class definition. |
| ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass); |
| |
| if (TagDecl) |
| Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); |
| |
| if (Tok.is(tok::colon)) { |
| ParseBaseClause(TagDecl); |
| |
| if (!Tok.is(tok::l_brace)) { |
| Diag(Tok, diag::err_expected_lbrace_after_base_specifiers); |
| |
| if (TagDecl) |
| Actions.ActOnTagDefinitionError(getCurScope(), TagDecl); |
| return; |
| } |
| } |
| |
| assert(Tok.is(tok::l_brace)); |
| |
| SourceLocation LBraceLoc = ConsumeBrace(); |
| |
| if (TagDecl) |
| Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, LBraceLoc); |
| |
| // 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; |
| |
| SourceLocation RBraceLoc; |
| if (TagDecl) { |
| // 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) |
| << DeclSpec::getSpecifierName((DeclSpec::TST)TagType) |
| << FixItHint::CreateRemoval(Tok.getLocation()); |
| ConsumeToken(); |
| continue; |
| } |
| |
| AccessSpecifier AS = getAccessSpecifierIfPresent(); |
| if (AS != AS_none) { |
| // Current token is a C++ access specifier. |
| CurAS = AS; |
| SourceLocation ASLoc = Tok.getLocation(); |
| ConsumeToken(); |
| if (Tok.is(tok::colon)) |
| Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation()); |
| else |
| Diag(Tok, diag::err_expected_colon); |
| ConsumeToken(); |
| continue; |
| } |
| |
| // FIXME: Make sure we don't have a template here. |
| |
| // Parse all the comma separated declarators. |
| ParseCXXClassMemberDeclaration(CurAS); |
| } |
| |
| RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc); |
| } else { |
| SkipUntil(tok::r_brace, false, false); |
| } |
| |
| // If attributes exist after class contents, parse them. |
| AttributeList *AttrList = 0; |
| if (Tok.is(tok::kw___attribute)) |
| AttrList = ParseGNUAttributes(); |
| |
| if (TagDecl) |
| Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl, |
| LBraceLoc, RBraceLoc, |
| AttrList); |
| |
| // 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 (TagDecl && NonNestedClass) { |
| // 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. |
| SourceLocation SavedPrevTokLocation = PrevTokLocation; |
| ParseLexedMethodDeclarations(getCurrentClass()); |
| ParseLexedMethodDefs(getCurrentClass()); |
| PrevTokLocation = SavedPrevTokLocation; |
| } |
| |
| if (TagDecl) |
| Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, RBraceLoc); |
| |
| // Leave the class scope. |
| ParsingDef.Pop(); |
| ClassScope.Exit(); |
| } |
| |
| /// 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(Decl *ConstructorDecl) { |
| assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); |
| |
| SourceLocation ColonLoc = ConsumeToken(); |
| |
| llvm::SmallVector<CXXBaseOrMemberInitializer*, 4> MemInitializers; |
| bool AnyErrors = false; |
| |
| do { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteConstructorInitializer(ConstructorDecl, |
| MemInitializers.data(), |
| MemInitializers.size()); |
| ConsumeCodeCompletionToken(); |
| } else { |
| MemInitResult MemInit = ParseMemInitializer(ConstructorDecl); |
| if (!MemInit.isInvalid()) |
| MemInitializers.push_back(MemInit.get()); |
| else |
| AnyErrors = true; |
| } |
| |
| if (Tok.is(tok::comma)) |
| ConsumeToken(); |
| else if (Tok.is(tok::l_brace)) |
| break; |
| // If the next token looks like a base or member initializer, assume that |
| // we're just missing a comma. |
| else if (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) { |
| SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation); |
| Diag(Loc, diag::err_ctor_init_missing_comma) |
| << FixItHint::CreateInsertion(Loc, ", "); |
| } else { |
| // Skip over garbage, until we get to '{'. Don't eat the '{'. |
| Diag(Tok.getLocation(), diag::err_expected_lbrace_or_comma); |
| SkipUntil(tok::l_brace, true, true); |
| break; |
| } |
| } while (true); |
| |
| Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, |
| MemInitializers.data(), MemInitializers.size(), |
| AnyErrors); |
| } |
| |
| /// 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(Decl *ConstructorDecl) { |
| // parse '::'[opt] nested-name-specifier[opt] |
| CXXScopeSpec SS; |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false); |
| ParsedType TemplateTypeTy; |
| if (Tok.is(tok::annot_template_id)) { |
| TemplateIdAnnotation *TemplateId |
| = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
| if (TemplateId->Kind == TNK_Type_template || |
| TemplateId->Kind == TNK_Dependent_template_name) { |
| AnnotateTemplateIdTokenAsType(&SS); |
| assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); |
| TemplateTypeTy = getTypeAnnotation(Tok); |
| } |
| } |
| if (!TemplateTypeTy && 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.is(tok::identifier) ? Tok.getIdentifierInfo() : 0; |
| 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, getCurScope(), SS, II, |
| TemplateTypeTy, IdLoc, |
| LParenLoc, ArgExprs.take(), |
| ArgExprs.size(), 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, |
| llvm::SmallVectorImpl<ParsedType> |
| &Exceptions, |
| llvm::SmallVectorImpl<SourceRange> |
| &Ranges, |
| bool &hasAnyExceptionSpec) { |
| 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)) { |
| hasAnyExceptionSpec = true; |
| 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. |
| SourceRange Range; |
| while (Tok.isNot(tok::r_paren)) { |
| TypeResult Res(ParseTypeName(&Range)); |
| if (!Res.isInvalid()) { |
| Exceptions.push_back(Res.get()); |
| Ranges.push_back(Range); |
| } |
| if (Tok.is(tok::comma)) |
| ConsumeToken(); |
| else |
| break; |
| } |
| |
| EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc); |
| return false; |
| } |
| |
| /// ParseTrailingReturnType - Parse a trailing return type on a new-style |
| /// function declaration. |
| TypeResult Parser::ParseTrailingReturnType() { |
| assert(Tok.is(tok::arrow) && "expected arrow"); |
| |
| ConsumeToken(); |
| |
| // FIXME: Need to suppress declarations when parsing this typename. |
| // Otherwise in this function definition: |
| // |
| // auto f() -> struct X {} |
| // |
| // struct X is parsed as class definition because of the trailing |
| // brace. |
| |
| SourceRange Range; |
| return ParseTypeName(&Range); |
| } |
| |
| /// \brief We have just started parsing the definition of a new class, |
| /// so push that class onto our stack of classes that is currently |
| /// being parsed. |
| void Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass) { |
| assert((NonNestedClass || !ClassStack.empty()) && |
| "Nested class without outer class"); |
| ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass)); |
| } |
| |
| /// \brief Deallocate the given parsed class and all of its nested |
| /// classes. |
| void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) { |
| for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I) |
| delete Class->LateParsedDeclarations[I]; |
| delete Class; |
| } |
| |
| /// \brief Pop the top class of the stack of classes that are |
| /// currently being parsed. |
| /// |
| /// This routine should be called when we have finished parsing the |
| /// definition of a class, but have not yet popped the Scope |
| /// associated with the class's definition. |
| /// |
| /// \returns true if the class we've popped is a top-level class, |
| /// false otherwise. |
| void Parser::PopParsingClass() { |
| assert(!ClassStack.empty() && "Mismatched push/pop for class parsing"); |
| |
| ParsingClass *Victim = ClassStack.top(); |
| ClassStack.pop(); |
| if (Victim->TopLevelClass) { |
| // Deallocate all of the nested classes of this class, |
| // recursively: we don't need to keep any of this information. |
| DeallocateParsedClasses(Victim); |
| return; |
| } |
| assert(!ClassStack.empty() && "Missing top-level class?"); |
| |
| if (Victim->LateParsedDeclarations.empty()) { |
| // The victim is a nested class, but we will not need to perform |
| // any processing after the definition of this class since it has |
| // no members whose handling was delayed. Therefore, we can just |
| // remove this nested class. |
| DeallocateParsedClasses(Victim); |
| return; |
| } |
| |
| // This nested class has some members that will need to be processed |
| // after the top-level class is completely defined. Therefore, add |
| // it to the list of nested classes within its parent. |
| assert(getCurScope()->isClassScope() && "Nested class outside of class scope?"); |
| ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim)); |
| Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope(); |
| } |
| |
| /// ParseCXX0XAttributes - Parse a C++0x attribute-specifier. Currently only |
| /// parses standard attributes. |
| /// |
| /// [C++0x] attribute-specifier: |
| /// '[' '[' attribute-list ']' ']' |
| /// |
| /// [C++0x] attribute-list: |
| /// attribute[opt] |
| /// attribute-list ',' attribute[opt] |
| /// |
| /// [C++0x] attribute: |
| /// attribute-token attribute-argument-clause[opt] |
| /// |
| /// [C++0x] attribute-token: |
| /// identifier |
| /// attribute-scoped-token |
| /// |
| /// [C++0x] attribute-scoped-token: |
| /// attribute-namespace '::' identifier |
| /// |
| /// [C++0x] attribute-namespace: |
| /// identifier |
| /// |
| /// [C++0x] attribute-argument-clause: |
| /// '(' balanced-token-seq ')' |
| /// |
| /// [C++0x] balanced-token-seq: |
| /// balanced-token |
| /// balanced-token-seq balanced-token |
| /// |
| /// [C++0x] balanced-token: |
| /// '(' balanced-token-seq ')' |
| /// '[' balanced-token-seq ']' |
| /// '{' balanced-token-seq '}' |
| /// any token but '(', ')', '[', ']', '{', or '}' |
| CXX0XAttributeList Parser::ParseCXX0XAttributes(SourceLocation *EndLoc) { |
| assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) |
| && "Not a C++0x attribute list"); |
| |
| SourceLocation StartLoc = Tok.getLocation(), Loc; |
| AttributeList *CurrAttr = 0; |
| |
| ConsumeBracket(); |
| ConsumeBracket(); |
| |
| if (Tok.is(tok::comma)) { |
| Diag(Tok.getLocation(), diag::err_expected_ident); |
| ConsumeToken(); |
| } |
| |
| while (Tok.is(tok::identifier) || Tok.is(tok::comma)) { |
| // attribute not present |
| if (Tok.is(tok::comma)) { |
| ConsumeToken(); |
| continue; |
| } |
| |
| IdentifierInfo *ScopeName = 0, *AttrName = Tok.getIdentifierInfo(); |
| SourceLocation ScopeLoc, AttrLoc = ConsumeToken(); |
| |
| // scoped attribute |
| if (Tok.is(tok::coloncolon)) { |
| ConsumeToken(); |
| |
| if (!Tok.is(tok::identifier)) { |
| Diag(Tok.getLocation(), diag::err_expected_ident); |
| SkipUntil(tok::r_square, tok::comma, true, true); |
| continue; |
| } |
| |
| ScopeName = AttrName; |
| ScopeLoc = AttrLoc; |
| |
| AttrName = Tok.getIdentifierInfo(); |
| AttrLoc = ConsumeToken(); |
| } |
| |
| bool AttrParsed = false; |
| // No scoped names are supported; ideally we could put all non-standard |
| // attributes into namespaces. |
| if (!ScopeName) { |
| switch(AttributeList::getKind(AttrName)) |
| { |
| // No arguments |
| case AttributeList::AT_base_check: |
| case AttributeList::AT_carries_dependency: |
| case AttributeList::AT_final: |
| case AttributeList::AT_hiding: |
| case AttributeList::AT_noreturn: |
| case AttributeList::AT_override: { |
| if (Tok.is(tok::l_paren)) { |
| Diag(Tok.getLocation(), diag::err_cxx0x_attribute_forbids_arguments) |
| << AttrName->getName(); |
| break; |
| } |
| |
| CurrAttr = AttrFactory.Create(AttrName, AttrLoc, 0, AttrLoc, 0, |
| SourceLocation(), 0, 0, CurrAttr, false, |
| true); |
| AttrParsed = true; |
| break; |
| } |
| |
| // One argument; must be a type-id or assignment-expression |
| case AttributeList::AT_aligned: { |
| if (Tok.isNot(tok::l_paren)) { |
| Diag(Tok.getLocation(), diag::err_cxx0x_attribute_requires_arguments) |
| << AttrName->getName(); |
| break; |
| } |
| SourceLocation ParamLoc = ConsumeParen(); |
| |
| ExprResult ArgExpr = ParseCXX0XAlignArgument(ParamLoc); |
| |
| MatchRHSPunctuation(tok::r_paren, ParamLoc); |
| |
| ExprVector ArgExprs(Actions); |
| ArgExprs.push_back(ArgExpr.release()); |
| CurrAttr = AttrFactory.Create(AttrName, AttrLoc, 0, AttrLoc, |
| 0, ParamLoc, ArgExprs.take(), 1, CurrAttr, |
| false, true); |
| |
| AttrParsed = true; |
| break; |
| } |
| |
| // Silence warnings |
| default: break; |
| } |
| } |
| |
| // Skip the entire parameter clause, if any |
| if (!AttrParsed && Tok.is(tok::l_paren)) { |
| ConsumeParen(); |
| // SkipUntil maintains the balancedness of tokens. |
| SkipUntil(tok::r_paren, false); |
| } |
| } |
| |
| if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) |
| SkipUntil(tok::r_square, false); |
| Loc = Tok.getLocation(); |
| if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare)) |
| SkipUntil(tok::r_square, false); |
| |
| CXX0XAttributeList Attr (CurrAttr, SourceRange(StartLoc, Loc), true); |
| return Attr; |
| } |
| |
| /// ParseCXX0XAlignArgument - Parse the argument to C++0x's [[align]] |
| /// attribute. |
| /// |
| /// FIXME: Simply returns an alignof() expression if the argument is a |
| /// type. Ideally, the type should be propagated directly into Sema. |
| /// |
| /// [C++0x] 'align' '(' type-id ')' |
| /// [C++0x] 'align' '(' assignment-expression ')' |
| ExprResult Parser::ParseCXX0XAlignArgument(SourceLocation Start) { |
| if (isTypeIdInParens()) { |
| EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated); |
| SourceLocation TypeLoc = Tok.getLocation(); |
| ParsedType Ty = ParseTypeName().get(); |
| SourceRange TypeRange(Start, Tok.getLocation()); |
| return Actions.ActOnSizeOfAlignOfExpr(TypeLoc, false, true, |
| Ty.getAsOpaquePtr(), TypeRange); |
| } else |
| return ParseConstantExpression(); |
| } |
| |
| /// ParseMicrosoftAttributes - Parse a Microsoft attribute [Attr] |
| /// |
| /// [MS] ms-attribute: |
| /// '[' token-seq ']' |
| /// |
| /// [MS] ms-attribute-seq: |
| /// ms-attribute[opt] |
| /// ms-attribute ms-attribute-seq |
| void Parser::ParseMicrosoftAttributes() { |
| assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list"); |
| |
| while (Tok.is(tok::l_square)) { |
| ConsumeBracket(); |
| SkipUntil(tok::r_square, true, true); |
| ExpectAndConsume(tok::r_square, diag::err_expected_rsquare); |
| } |
| } |