| //===--- 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 "RAIIObjectsForParser.h" |
| #include "clang/AST/ASTContext.h" |
| #include "clang/AST/DeclTemplate.h" |
| #include "clang/Basic/Attributes.h" |
| #include "clang/Basic/CharInfo.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/Basic/OperatorKinds.h" |
| #include "clang/Parse/ParseDiagnostic.h" |
| #include "clang/Sema/DeclSpec.h" |
| #include "clang/Sema/ParsedTemplate.h" |
| #include "clang/Sema/PrettyDeclStackTrace.h" |
| #include "clang/Sema/Scope.h" |
| #include "clang/Sema/SemaDiagnostic.h" |
| #include "llvm/ADT/SmallString.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'. |
| ObjCDeclContextSwitch ObjCDC(*this); |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteNamespaceDecl(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| SourceLocation IdentLoc; |
| IdentifierInfo *Ident = nullptr; |
| std::vector<SourceLocation> ExtraIdentLoc; |
| std::vector<IdentifierInfo*> ExtraIdent; |
| std::vector<SourceLocation> ExtraNamespaceLoc; |
| |
| Token attrTok; |
| |
| if (Tok.is(tok::identifier)) { |
| Ident = Tok.getIdentifierInfo(); |
| IdentLoc = ConsumeToken(); // eat the identifier. |
| while (Tok.is(tok::coloncolon) && NextToken().is(tok::identifier)) { |
| ExtraNamespaceLoc.push_back(ConsumeToken()); |
| ExtraIdent.push_back(Tok.getIdentifierInfo()); |
| ExtraIdentLoc.push_back(ConsumeToken()); |
| } |
| } |
| |
| // Read label attributes, if present. |
| ParsedAttributes attrs(AttrFactory); |
| if (Tok.is(tok::kw___attribute)) { |
| attrTok = Tok; |
| ParseGNUAttributes(attrs); |
| } |
| |
| if (Tok.is(tok::equal)) { |
| if (!Ident) { |
| Diag(Tok, diag::err_expected) << tok::identifier; |
| // Skip to end of the definition and eat the ';'. |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| if (!attrs.empty()) |
| 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); |
| } |
| |
| |
| BalancedDelimiterTracker T(*this, tok::l_brace); |
| if (T.consumeOpen()) { |
| if (!ExtraIdent.empty()) { |
| Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) |
| << SourceRange(ExtraNamespaceLoc.front(), ExtraIdentLoc.back()); |
| } |
| |
| if (Ident) |
| Diag(Tok, diag::err_expected) << tok::l_brace; |
| else |
| Diag(Tok, diag::err_expected_either) << tok::identifier << tok::l_brace; |
| |
| return nullptr; |
| } |
| |
| if (getCurScope()->isClassScope() || getCurScope()->isTemplateParamScope() || |
| getCurScope()->isInObjcMethodScope() || getCurScope()->getBlockParent() || |
| getCurScope()->getFnParent()) { |
| if (!ExtraIdent.empty()) { |
| Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) |
| << SourceRange(ExtraNamespaceLoc.front(), ExtraIdentLoc.back()); |
| } |
| Diag(T.getOpenLocation(), diag::err_namespace_nonnamespace_scope); |
| SkipUntil(tok::r_brace); |
| return nullptr; |
| } |
| |
| if (!ExtraIdent.empty()) { |
| TentativeParsingAction TPA(*this); |
| SkipUntil(tok::r_brace, StopBeforeMatch); |
| Token rBraceToken = Tok; |
| TPA.Revert(); |
| |
| if (!rBraceToken.is(tok::r_brace)) { |
| Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) |
| << SourceRange(ExtraNamespaceLoc.front(), ExtraIdentLoc.back()); |
| } else { |
| std::string NamespaceFix; |
| for (std::vector<IdentifierInfo*>::iterator I = ExtraIdent.begin(), |
| E = ExtraIdent.end(); I != E; ++I) { |
| NamespaceFix += " { namespace "; |
| NamespaceFix += (*I)->getName(); |
| } |
| |
| std::string RBraces; |
| for (unsigned i = 0, e = ExtraIdent.size(); i != e; ++i) |
| RBraces += "} "; |
| |
| Diag(ExtraNamespaceLoc[0], diag::err_nested_namespaces_with_double_colon) |
| << FixItHint::CreateReplacement(SourceRange(ExtraNamespaceLoc.front(), |
| ExtraIdentLoc.back()), |
| NamespaceFix) |
| << FixItHint::CreateInsertion(rBraceToken.getLocation(), RBraces); |
| } |
| } |
| |
| // If we're still good, complain about inline namespaces in non-C++0x now. |
| if (InlineLoc.isValid()) |
| Diag(InlineLoc, getLangOpts().CPlusPlus11 ? |
| diag::warn_cxx98_compat_inline_namespace : diag::ext_inline_namespace); |
| |
| // Enter a scope for the namespace. |
| ParseScope NamespaceScope(this, Scope::DeclScope); |
| |
| Decl *NamespcDecl = |
| Actions.ActOnStartNamespaceDef(getCurScope(), InlineLoc, NamespaceLoc, |
| IdentLoc, Ident, T.getOpenLocation(), |
| attrs.getList()); |
| |
| PrettyDeclStackTraceEntry CrashInfo(Actions, NamespcDecl, NamespaceLoc, |
| "parsing namespace"); |
| |
| // Parse the contents of the namespace. This includes parsing recovery on |
| // any improperly nested namespaces. |
| ParseInnerNamespace(ExtraIdentLoc, ExtraIdent, ExtraNamespaceLoc, 0, |
| InlineLoc, attrs, T); |
| |
| // Leave the namespace scope. |
| NamespaceScope.Exit(); |
| |
| DeclEnd = T.getCloseLocation(); |
| Actions.ActOnFinishNamespaceDef(NamespcDecl, DeclEnd); |
| |
| return NamespcDecl; |
| } |
| |
| /// ParseInnerNamespace - Parse the contents of a namespace. |
| void Parser::ParseInnerNamespace(std::vector<SourceLocation>& IdentLoc, |
| std::vector<IdentifierInfo*>& Ident, |
| std::vector<SourceLocation>& NamespaceLoc, |
| unsigned int index, SourceLocation& InlineLoc, |
| ParsedAttributes& attrs, |
| BalancedDelimiterTracker &Tracker) { |
| if (index == Ident.size()) { |
| while (Tok.isNot(tok::r_brace) && !isEofOrEom()) { |
| ParsedAttributesWithRange attrs(AttrFactory); |
| MaybeParseCXX11Attributes(attrs); |
| MaybeParseMicrosoftAttributes(attrs); |
| ParseExternalDeclaration(attrs); |
| } |
| |
| // The caller is what called check -- we are simply calling |
| // the close for it. |
| Tracker.consumeClose(); |
| |
| return; |
| } |
| |
| // Parse improperly nested namespaces. |
| ParseScope NamespaceScope(this, Scope::DeclScope); |
| Decl *NamespcDecl = |
| Actions.ActOnStartNamespaceDef(getCurScope(), SourceLocation(), |
| NamespaceLoc[index], IdentLoc[index], |
| Ident[index], Tracker.getOpenLocation(), |
| attrs.getList()); |
| |
| ParseInnerNamespace(IdentLoc, Ident, NamespaceLoc, ++index, InlineLoc, |
| attrs, Tracker); |
| |
| NamespaceScope.Exit(); |
| |
| Actions.ActOnFinishNamespaceDef(NamespcDecl, Tracker.getCloseLocation()); |
| } |
| |
| /// 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()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| CXXScopeSpec SS; |
| // Parse (optional) nested-name-specifier. |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/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 nullptr; |
| } |
| |
| // Parse identifier. |
| IdentifierInfo *Ident = Tok.getIdentifierInfo(); |
| SourceLocation IdentLoc = ConsumeToken(); |
| |
| // Eat the ';'. |
| DeclEnd = Tok.getLocation(); |
| if (ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name)) |
| SkipUntil(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(isTokenStringLiteral() && "Not a string literal!"); |
| ExprResult Lang = ParseStringLiteralExpression(false); |
| |
| ParseScope LinkageScope(this, Scope::DeclScope); |
| Decl *LinkageSpec = |
| Lang.isInvalid() |
| ? nullptr |
| : Actions.ActOnStartLinkageSpecification( |
| getCurScope(), DS.getSourceRange().getBegin(), Lang.get(), |
| Tok.is(tok::l_brace) ? Tok.getLocation() : SourceLocation()); |
| |
| ParsedAttributesWithRange attrs(AttrFactory); |
| MaybeParseCXX11Attributes(attrs); |
| MaybeParseMicrosoftAttributes(attrs); |
| |
| if (Tok.isNot(tok::l_brace)) { |
| // Reset the source range in DS, as the leading "extern" |
| // does not really belong to the inner declaration ... |
| DS.SetRangeStart(SourceLocation()); |
| DS.SetRangeEnd(SourceLocation()); |
| // ... but anyway remember that such an "extern" was seen. |
| DS.setExternInLinkageSpec(true); |
| ParseExternalDeclaration(attrs, &DS); |
| return LinkageSpec ? Actions.ActOnFinishLinkageSpecification( |
| getCurScope(), LinkageSpec, SourceLocation()) |
| : nullptr; |
| } |
| |
| DS.abort(); |
| |
| ProhibitAttributes(attrs); |
| |
| BalancedDelimiterTracker T(*this, tok::l_brace); |
| T.consumeOpen(); |
| |
| unsigned NestedModules = 0; |
| while (true) { |
| switch (Tok.getKind()) { |
| case tok::annot_module_begin: |
| ++NestedModules; |
| ParseTopLevelDecl(); |
| continue; |
| |
| case tok::annot_module_end: |
| if (!NestedModules) |
| break; |
| --NestedModules; |
| ParseTopLevelDecl(); |
| continue; |
| |
| case tok::annot_module_include: |
| ParseTopLevelDecl(); |
| continue; |
| |
| case tok::eof: |
| break; |
| |
| case tok::r_brace: |
| if (!NestedModules) |
| break; |
| // Fall through. |
| default: |
| ParsedAttributesWithRange attrs(AttrFactory); |
| MaybeParseCXX11Attributes(attrs); |
| MaybeParseMicrosoftAttributes(attrs); |
| ParseExternalDeclaration(attrs); |
| continue; |
| } |
| |
| break; |
| } |
| |
| T.consumeClose(); |
| return LinkageSpec ? Actions.ActOnFinishLinkageSpecification( |
| getCurScope(), LinkageSpec, T.getCloseLocation()) |
| : nullptr; |
| } |
| |
| /// 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, |
| ParsedAttributesWithRange &attrs, |
| Decl **OwnedType) { |
| assert(Tok.is(tok::kw_using) && "Not using token"); |
| ObjCDeclContextSwitch ObjCDC(*this); |
| |
| // Eat 'using'. |
| SourceLocation UsingLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteUsing(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| // '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, attrs); |
| } |
| |
| // Otherwise, it must be a using-declaration or an alias-declaration. |
| |
| // Using declarations can't have attributes. |
| ProhibitAttributes(attrs); |
| |
| return ParseUsingDeclaration(Context, TemplateInfo, UsingLoc, DeclEnd, |
| AS_none, OwnedType); |
| } |
| |
| /// 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, |
| ParsedAttributes &attrs) { |
| assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token"); |
| |
| // Eat 'namespace'. |
| SourceLocation NamespcLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteUsingDirective(getCurScope()); |
| cutOffParsing(); |
| return nullptr; |
| } |
| |
| CXXScopeSpec SS; |
| // Parse (optional) nested-name-specifier. |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); |
| |
| IdentifierInfo *NamespcName = nullptr; |
| 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 nullptr; |
| } |
| |
| // 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; |
| ParseGNUAttributes(attrs); |
| } |
| |
| // Eat ';'. |
| DeclEnd = Tok.getLocation(); |
| if (ExpectAndConsume(tok::semi, |
| GNUAttr ? diag::err_expected_semi_after_attribute_list |
| : diag::err_expected_semi_after_namespace_name)) |
| SkipUntil(tok::semi); |
| |
| return Actions.ActOnUsingDirective(getCurScope(), UsingLoc, NamespcLoc, SS, |
| IdentLoc, NamespcName, attrs.getList()); |
| } |
| |
| /// ParseUsingDeclaration - Parse C++ using-declaration or alias-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 |
| /// |
| /// alias-declaration: C++11 [dcl.dcl]p1 |
| /// 'using' identifier attribute-specifier-seq[opt] = type-id ; |
| /// |
| Decl *Parser::ParseUsingDeclaration(unsigned Context, |
| const ParsedTemplateInfo &TemplateInfo, |
| SourceLocation UsingLoc, |
| SourceLocation &DeclEnd, |
| AccessSpecifier AS, |
| Decl **OwnedType) { |
| CXXScopeSpec SS; |
| SourceLocation TypenameLoc; |
| bool HasTypenameKeyword = false; |
| |
| // Check for misplaced attributes before the identifier in an |
| // alias-declaration. |
| ParsedAttributesWithRange MisplacedAttrs(AttrFactory); |
| MaybeParseCXX11Attributes(MisplacedAttrs); |
| |
| // Ignore optional 'typename'. |
| // FIXME: This is wrong; we should parse this as a typename-specifier. |
| if (TryConsumeToken(tok::kw_typename, TypenameLoc)) |
| HasTypenameKeyword = true; |
| |
| // Parse nested-name-specifier. |
| IdentifierInfo *LastII = nullptr; |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false, |
| /*MayBePseudoDtor=*/nullptr, |
| /*IsTypename=*/false, |
| /*LastII=*/&LastII); |
| |
| // Check nested-name specifier. |
| if (SS.isInvalid()) { |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| |
| SourceLocation TemplateKWLoc; |
| UnqualifiedId Name; |
| |
| // Parse the unqualified-id. We allow parsing of both constructor and |
| // destructor names and allow the action module to diagnose any semantic |
| // errors. |
| // |
| // C++11 [class.qual]p2: |
| // [...] in a using-declaration that is a member-declaration, if the name |
| // specified after the nested-name-specifier is the same as the identifier |
| // or the simple-template-id's template-name in the last component of the |
| // nested-name-specifier, the name is [...] considered to name the |
| // constructor. |
| if (getLangOpts().CPlusPlus11 && Context == Declarator::MemberContext && |
| Tok.is(tok::identifier) && NextToken().is(tok::semi) && |
| SS.isNotEmpty() && LastII == Tok.getIdentifierInfo() && |
| !SS.getScopeRep()->getAsNamespace() && |
| !SS.getScopeRep()->getAsNamespaceAlias()) { |
| SourceLocation IdLoc = ConsumeToken(); |
| ParsedType Type = Actions.getInheritingConstructorName(SS, IdLoc, *LastII); |
| Name.setConstructorName(Type, IdLoc, IdLoc); |
| } else if (ParseUnqualifiedId(SS, /*EnteringContext=*/ false, |
| /*AllowDestructorName=*/ true, |
| /*AllowConstructorName=*/ true, ParsedType(), |
| TemplateKWLoc, Name)) { |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| |
| ParsedAttributesWithRange Attrs(AttrFactory); |
| MaybeParseGNUAttributes(Attrs); |
| MaybeParseCXX11Attributes(Attrs); |
| |
| // Maybe this is an alias-declaration. |
| TypeResult TypeAlias; |
| bool IsAliasDecl = Tok.is(tok::equal); |
| if (IsAliasDecl) { |
| // If we had any misplaced attributes from earlier, this is where they |
| // should have been written. |
| if (MisplacedAttrs.Range.isValid()) { |
| Diag(MisplacedAttrs.Range.getBegin(), diag::err_attributes_not_allowed) |
| << FixItHint::CreateInsertionFromRange( |
| Tok.getLocation(), |
| CharSourceRange::getTokenRange(MisplacedAttrs.Range)) |
| << FixItHint::CreateRemoval(MisplacedAttrs.Range); |
| Attrs.takeAllFrom(MisplacedAttrs); |
| } |
| |
| ConsumeToken(); |
| |
| Diag(Tok.getLocation(), getLangOpts().CPlusPlus11 ? |
| diag::warn_cxx98_compat_alias_declaration : |
| diag::ext_alias_declaration); |
| |
| // Type alias templates cannot be specialized. |
| int SpecKind = -1; |
| if (TemplateInfo.Kind == ParsedTemplateInfo::Template && |
| Name.getKind() == UnqualifiedId::IK_TemplateId) |
| SpecKind = 0; |
| if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization) |
| SpecKind = 1; |
| if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) |
| SpecKind = 2; |
| if (SpecKind != -1) { |
| SourceRange Range; |
| if (SpecKind == 0) |
| Range = SourceRange(Name.TemplateId->LAngleLoc, |
| Name.TemplateId->RAngleLoc); |
| else |
| Range = TemplateInfo.getSourceRange(); |
| Diag(Range.getBegin(), diag::err_alias_declaration_specialization) |
| << SpecKind << Range; |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| |
| // Name must be an identifier. |
| if (Name.getKind() != UnqualifiedId::IK_Identifier) { |
| Diag(Name.StartLocation, diag::err_alias_declaration_not_identifier); |
| // No removal fixit: can't recover from this. |
| SkipUntil(tok::semi); |
| return nullptr; |
| } else if (HasTypenameKeyword) |
| Diag(TypenameLoc, diag::err_alias_declaration_not_identifier) |
| << FixItHint::CreateRemoval(SourceRange(TypenameLoc, |
| SS.isNotEmpty() ? SS.getEndLoc() : TypenameLoc)); |
| else if (SS.isNotEmpty()) |
| Diag(SS.getBeginLoc(), diag::err_alias_declaration_not_identifier) |
| << FixItHint::CreateRemoval(SS.getRange()); |
| |
| TypeAlias = ParseTypeName(nullptr, TemplateInfo.Kind ? |
| Declarator::AliasTemplateContext : |
| Declarator::AliasDeclContext, AS, OwnedType, |
| &Attrs); |
| } else { |
| // C++11 attributes are not allowed on a using-declaration, but GNU ones |
| // are. |
| ProhibitAttributes(MisplacedAttrs); |
| ProhibitAttributes(Attrs); |
| |
| // Parse (optional) attributes (most likely GNU strong-using extension). |
| MaybeParseGNUAttributes(Attrs); |
| } |
| |
| // Eat ';'. |
| DeclEnd = Tok.getLocation(); |
| if (ExpectAndConsume(tok::semi, diag::err_expected_after, |
| !Attrs.empty() ? "attributes list" |
| : IsAliasDecl ? "alias declaration" |
| : "using declaration")) |
| SkipUntil(tok::semi); |
| |
| // Diagnose an attempt to declare a templated using-declaration. |
| // In C++11, alias-declarations can be templates: |
| // template <...> using id = type; |
| if (TemplateInfo.Kind && !IsAliasDecl) { |
| 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 nullptr; |
| } |
| |
| // "typename" keyword is allowed for identifiers only, |
| // because it may be a type definition. |
| if (HasTypenameKeyword && Name.getKind() != UnqualifiedId::IK_Identifier) { |
| Diag(Name.getSourceRange().getBegin(), diag::err_typename_identifiers_only) |
| << FixItHint::CreateRemoval(SourceRange(TypenameLoc)); |
| // Proceed parsing, but reset the HasTypenameKeyword flag. |
| HasTypenameKeyword = false; |
| } |
| |
| if (IsAliasDecl) { |
| TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; |
| MultiTemplateParamsArg TemplateParamsArg( |
| TemplateParams ? TemplateParams->data() : nullptr, |
| TemplateParams ? TemplateParams->size() : 0); |
| return Actions.ActOnAliasDeclaration(getCurScope(), AS, TemplateParamsArg, |
| UsingLoc, Name, Attrs.getList(), |
| TypeAlias); |
| } |
| |
| return Actions.ActOnUsingDeclaration(getCurScope(), AS, |
| /* HasUsingKeyword */ true, UsingLoc, |
| SS, Name, Attrs.getList(), |
| HasTypenameKeyword, TypenameLoc); |
| } |
| |
| /// ParseStaticAssertDeclaration - Parse C++0x or C11 static_assert-declaration. |
| /// |
| /// [C++0x] static_assert-declaration: |
| /// static_assert ( constant-expression , string-literal ) ; |
| /// |
| /// [C11] static_assert-declaration: |
| /// _Static_assert ( constant-expression , string-literal ) ; |
| /// |
| Decl *Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){ |
| assert((Tok.is(tok::kw_static_assert) || Tok.is(tok::kw__Static_assert)) && |
| "Not a static_assert declaration"); |
| |
| if (Tok.is(tok::kw__Static_assert) && !getLangOpts().C11) |
| Diag(Tok, diag::ext_c11_static_assert); |
| if (Tok.is(tok::kw_static_assert)) |
| Diag(Tok, diag::warn_cxx98_compat_static_assert); |
| |
| SourceLocation StaticAssertLoc = ConsumeToken(); |
| |
| BalancedDelimiterTracker T(*this, tok::l_paren); |
| if (T.consumeOpen()) { |
| Diag(Tok, diag::err_expected) << tok::l_paren; |
| SkipMalformedDecl(); |
| return nullptr; |
| } |
| |
| ExprResult AssertExpr(ParseConstantExpression()); |
| if (AssertExpr.isInvalid()) { |
| SkipMalformedDecl(); |
| return nullptr; |
| } |
| |
| ExprResult AssertMessage; |
| if (Tok.is(tok::r_paren)) { |
| Diag(Tok, getLangOpts().CPlusPlus1z |
| ? diag::warn_cxx1y_compat_static_assert_no_message |
| : diag::ext_static_assert_no_message) |
| << (getLangOpts().CPlusPlus1z |
| ? FixItHint() |
| : FixItHint::CreateInsertion(Tok.getLocation(), ", \"\"")); |
| } else { |
| if (ExpectAndConsume(tok::comma)) { |
| SkipUntil(tok::semi); |
| return nullptr; |
| } |
| |
| if (!isTokenStringLiteral()) { |
| Diag(Tok, diag::err_expected_string_literal) |
| << /*Source='static_assert'*/1; |
| SkipMalformedDecl(); |
| return nullptr; |
| } |
| |
| AssertMessage = ParseStringLiteralExpression(); |
| if (AssertMessage.isInvalid()) { |
| SkipMalformedDecl(); |
| return nullptr; |
| } |
| } |
| |
| T.consumeClose(); |
| |
| DeclEnd = Tok.getLocation(); |
| ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert); |
| |
| return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, |
| AssertExpr.get(), |
| AssertMessage.get(), |
| T.getCloseLocation()); |
| } |
| |
| /// ParseDecltypeSpecifier - Parse a C++11 decltype specifier. |
| /// |
| /// 'decltype' ( expression ) |
| /// 'decltype' ( 'auto' ) [C++1y] |
| /// |
| SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) { |
| assert((Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) |
| && "Not a decltype specifier"); |
| |
| ExprResult Result; |
| SourceLocation StartLoc = Tok.getLocation(); |
| SourceLocation EndLoc; |
| |
| if (Tok.is(tok::annot_decltype)) { |
| Result = getExprAnnotation(Tok); |
| EndLoc = Tok.getAnnotationEndLoc(); |
| ConsumeToken(); |
| if (Result.isInvalid()) { |
| DS.SetTypeSpecError(); |
| return EndLoc; |
| } |
| } else { |
| if (Tok.getIdentifierInfo()->isStr("decltype")) |
| Diag(Tok, diag::warn_cxx98_compat_decltype); |
| |
| ConsumeToken(); |
| |
| BalancedDelimiterTracker T(*this, tok::l_paren); |
| if (T.expectAndConsume(diag::err_expected_lparen_after, |
| "decltype", tok::r_paren)) { |
| DS.SetTypeSpecError(); |
| return T.getOpenLocation() == Tok.getLocation() ? |
| StartLoc : T.getOpenLocation(); |
| } |
| |
| // Check for C++1y 'decltype(auto)'. |
| if (Tok.is(tok::kw_auto)) { |
| // No need to disambiguate here: an expression can't start with 'auto', |
| // because the typename-specifier in a function-style cast operation can't |
| // be 'auto'. |
| Diag(Tok.getLocation(), |
| getLangOpts().CPlusPlus1y |
| ? diag::warn_cxx11_compat_decltype_auto_type_specifier |
| : diag::ext_decltype_auto_type_specifier); |
| ConsumeToken(); |
| } else { |
| // Parse the expression |
| |
| // C++11 [dcl.type.simple]p4: |
| // The operand of the decltype specifier is an unevaluated operand. |
| EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated, |
| nullptr,/*IsDecltype=*/true); |
| Result = ParseExpression(); |
| if (Result.isInvalid()) { |
| DS.SetTypeSpecError(); |
| if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) { |
| EndLoc = ConsumeParen(); |
| } else { |
| if (PP.isBacktrackEnabled() && Tok.is(tok::semi)) { |
| // Backtrack to get the location of the last token before the semi. |
| PP.RevertCachedTokens(2); |
| ConsumeToken(); // the semi. |
| EndLoc = ConsumeAnyToken(); |
| assert(Tok.is(tok::semi)); |
| } else { |
| EndLoc = Tok.getLocation(); |
| } |
| } |
| return EndLoc; |
| } |
| |
| Result = Actions.ActOnDecltypeExpression(Result.get()); |
| } |
| |
| // Match the ')' |
| T.consumeClose(); |
| if (T.getCloseLocation().isInvalid()) { |
| DS.SetTypeSpecError(); |
| // FIXME: this should return the location of the last token |
| // that was consumed (by "consumeClose()") |
| return T.getCloseLocation(); |
| } |
| |
| if (Result.isInvalid()) { |
| DS.SetTypeSpecError(); |
| return T.getCloseLocation(); |
| } |
| |
| EndLoc = T.getCloseLocation(); |
| } |
| assert(!Result.isInvalid()); |
| |
| const char *PrevSpec = nullptr; |
| unsigned DiagID; |
| const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy(); |
| // Check for duplicate type specifiers (e.g. "int decltype(a)"). |
| if (Result.get() |
| ? DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec, |
| DiagID, Result.get(), Policy) |
| : DS.SetTypeSpecType(DeclSpec::TST_decltype_auto, StartLoc, PrevSpec, |
| DiagID, Policy)) { |
| Diag(StartLoc, DiagID) << PrevSpec; |
| DS.SetTypeSpecError(); |
| } |
| return EndLoc; |
| } |
| |
| void Parser::AnnotateExistingDecltypeSpecifier(const DeclSpec& DS, |
| SourceLocation StartLoc, |
| SourceLocation EndLoc) { |
| // make sure we have a token we can turn into an annotation token |
| if (PP.isBacktrackEnabled()) |
| PP.RevertCachedTokens(1); |
| else |
| PP.EnterToken(Tok); |
| |
| Tok.setKind(tok::annot_decltype); |
| setExprAnnotation(Tok, |
| DS.getTypeSpecType() == TST_decltype ? DS.getRepAsExpr() : |
| DS.getTypeSpecType() == TST_decltype_auto ? ExprResult() : |
| ExprError()); |
| Tok.setAnnotationEndLoc(EndLoc); |
| Tok.setLocation(StartLoc); |
| PP.AnnotateCachedTokens(Tok); |
| } |
| |
| void Parser::ParseUnderlyingTypeSpecifier(DeclSpec &DS) { |
| assert(Tok.is(tok::kw___underlying_type) && |
| "Not an underlying type specifier"); |
| |
| SourceLocation StartLoc = ConsumeToken(); |
| BalancedDelimiterTracker T(*this, tok::l_paren); |
| if (T.expectAndConsume(diag::err_expected_lparen_after, |
| "__underlying_type", tok::r_paren)) { |
| return; |
| } |
| |
| TypeResult Result = ParseTypeName(); |
| if (Result.isInvalid()) { |
| SkipUntil(tok::r_paren, StopAtSemi); |
| return; |
| } |
| |
| // Match the ')' |
| T.consumeClose(); |
| if (T.getCloseLocation().isInvalid()) |
| return; |
| |
| const char *PrevSpec = nullptr; |
| unsigned DiagID; |
| if (DS.SetTypeSpecType(DeclSpec::TST_underlyingType, StartLoc, PrevSpec, |
| DiagID, Result.get(), |
| Actions.getASTContext().getPrintingPolicy())) |
| Diag(StartLoc, DiagID) << PrevSpec; |
| DS.setTypeofParensRange(T.getRange()); |
| } |
| |
| /// ParseBaseTypeSpecifier - Parse a C++ base-type-specifier which is either a |
| /// class name or decltype-specifier. 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. |
| /// |
| /// base-type-specifier: [C++11 class.derived] |
| /// class-or-decltype |
| /// class-or-decltype: [C++11 class.derived] |
| /// nested-name-specifier[opt] class-name |
| /// decltype-specifier |
| /// class-name: [C++ class.name] |
| /// identifier |
| /// simple-template-id |
| /// |
| /// In C++98, instead of base-type-specifier, we have: |
| /// |
| /// ::[opt] nested-name-specifier[opt] class-name |
| Parser::TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc, |
| SourceLocation &EndLocation) { |
| // Ignore attempts to use typename |
| if (Tok.is(tok::kw_typename)) { |
| Diag(Tok, diag::err_expected_class_name_not_template) |
| << FixItHint::CreateRemoval(Tok.getLocation()); |
| ConsumeToken(); |
| } |
| |
| // Parse optional nested-name-specifier |
| CXXScopeSpec SS; |
| ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false); |
| |
| BaseLoc = Tok.getLocation(); |
| |
| // Parse decltype-specifier |
| // tok == kw_decltype is just error recovery, it can only happen when SS |
| // isn't empty |
| if (Tok.is(tok::kw_decltype) || Tok.is(tok::annot_decltype)) { |
| if (SS.isNotEmpty()) |
| Diag(SS.getBeginLoc(), diag::err_unexpected_scope_on_base_decltype) |
| << FixItHint::CreateRemoval(SS.getRange()); |
| // Fake up a Declarator to use with ActOnTypeName. |
| DeclSpec DS(AttrFactory); |
| |
| EndLocation = ParseDecltypeSpecifier(DS); |
| |
| Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); |
| return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| } |
| |
| // Check whether we have a template-id that names a type. |
| if (Tok.is(tok::annot_template_id)) { |
| TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); |
| if (TemplateId->Kind == TNK_Type_template || |
| TemplateId->Kind == TNK_Dependent_template_name) { |
| AnnotateTemplateIdTokenAsType(); |
| |
| 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) { |
| TemplateArgList TemplateArgs; |
| SourceLocation LAngleLoc, RAngleLoc; |
| ParseTemplateIdAfterTemplateName(TemplateTy(), IdLoc, SS, |
| true, LAngleLoc, TemplateArgs, RAngleLoc); |
| 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, SourceLocation(), |
| TemplateName, true)) |
| return true; |
| if (TNK == TNK_Dependent_template_name) |
| AnnotateTemplateIdTokenAsType(); |
| |
| // 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. |
| IdentifierInfo *CorrectedII = nullptr; |
| ParsedType Type = Actions.getTypeName(*Id, IdLoc, getCurScope(), &SS, true, |
| false, ParsedType(), |
| /*IsCtorOrDtorName=*/false, |
| /*NonTrivialTypeSourceInfo=*/true, |
| &CorrectedII); |
| 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(AttrFactory); |
| DS.SetRangeStart(IdLoc); |
| DS.SetRangeEnd(EndLocation); |
| DS.getTypeSpecScope() = SS; |
| |
| const char *PrevSpec = nullptr; |
| unsigned DiagID; |
| DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type, |
| Actions.getASTContext().getPrintingPolicy()); |
| |
| Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); |
| return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| } |
| |
| void Parser::ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs) { |
| while (Tok.is(tok::kw___single_inheritance) || |
| Tok.is(tok::kw___multiple_inheritance) || |
| Tok.is(tok::kw___virtual_inheritance)) { |
| IdentifierInfo *AttrName = Tok.getIdentifierInfo(); |
| SourceLocation AttrNameLoc = ConsumeToken(); |
| attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0, |
| AttributeList::AS_Keyword); |
| } |
| } |
| |
| /// Determine whether the following tokens are valid after a type-specifier |
| /// which could be a standalone declaration. This will conservatively return |
| /// true if there's any doubt, and is appropriate for insert-';' fixits. |
| bool Parser::isValidAfterTypeSpecifier(bool CouldBeBitfield) { |
| // This switch enumerates the valid "follow" set for type-specifiers. |
| switch (Tok.getKind()) { |
| default: break; |
| case tok::semi: // struct foo {...} ; |
| case tok::star: // struct foo {...} * P; |
| case tok::amp: // struct foo {...} & R = ... |
| case tok::ampamp: // 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{...} , |
| case tok::kw_operator: // struct foo operator ++() {...} |
| case tok::kw___declspec: // struct foo {...} __declspec(...) |
| return true; |
| case tok::colon: |
| return CouldBeBitfield; // enum E { ... } : 2; |
| // 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; |
| // Function specifiers |
| // Note, no 'explicit'. An explicit function must be either a conversion |
| // operator or a constructor. Either way, it can't have a return type. |
| case tok::kw_inline: // struct foo inline f(); |
| case tok::kw_virtual: // struct foo virtual f(); |
| case tok::kw_friend: // struct foo friend f(); |
| // 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; |
| case tok::kw_thread_local: // struct foo {...} thread_local x; |
| case tok::kw_constexpr: // struct foo {...} constexpr x; |
| // As shown above, type qualifiers and storage class specifiers absolutely |
| // can occur after class specifiers according to the grammar. However, |
| // almost no one 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())) |
| return true; |
| break; |
| case tok::r_brace: // struct bar { struct foo {...} } |
| // Missing ';' at end of struct is accepted as an extension in C mode. |
| if (!getLangOpts().CPlusPlus) |
| return true; |
| break; |
| // C++11 attributes |
| case tok::l_square: // enum E [[]] x |
| // Note, no tok::kw_alignas here; alignas cannot appertain to a type. |
| return getLangOpts().CPlusPlus11 && NextToken().is(tok::l_square); |
| case tok::greater: |
| // template<class T = class X> |
| return getLangOpts().CPlusPlus; |
| } |
| return false; |
| } |
| |
| /// 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, |
| const ParsedTemplateInfo &TemplateInfo, |
| AccessSpecifier AS, |
| bool EnteringContext, DeclSpecContext DSC, |
| ParsedAttributesWithRange &Attributes) { |
| DeclSpec::TST TagType; |
| if (TagTokKind == tok::kw_struct) |
| TagType = DeclSpec::TST_struct; |
| else if (TagTokKind == tok::kw___interface) |
| TagType = DeclSpec::TST_interface; |
| 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); |
| return cutOffParsing(); |
| } |
| |
| // 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. |
| // |
| // Note that we don't suppress if this turns out to be an elaborated |
| // type specifier. |
| bool shouldDelayDiagsInTag = |
| (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation || |
| TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization); |
| SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag); |
| |
| ParsedAttributesWithRange attrs(AttrFactory); |
| // If attributes exist after tag, parse them. |
| MaybeParseGNUAttributes(attrs); |
| |
| // If declspecs exist after tag, parse them. |
| while (Tok.is(tok::kw___declspec)) |
| ParseMicrosoftDeclSpec(attrs); |
| |
| // Parse inheritance specifiers. |
| if (Tok.is(tok::kw___single_inheritance) || |
| Tok.is(tok::kw___multiple_inheritance) || |
| Tok.is(tok::kw___virtual_inheritance)) |
| ParseMicrosoftInheritanceClassAttributes(attrs); |
| |
| // If C++0x attributes exist here, parse them. |
| // FIXME: Are we consistent with the ordering of parsing of different |
| // styles of attributes? |
| MaybeParseCXX11Attributes(attrs); |
| |
| // Source location used by FIXIT to insert misplaced |
| // C++11 attributes |
| SourceLocation AttrFixitLoc = Tok.getLocation(); |
| |
| // GNU libstdc++ and libc++ use certain intrinsic names as the |
| // name of struct templates, but some are keywords in GCC >= 4.3 |
| // MSVC and Clang. For compatibility, convert the token to an identifier |
| // and issue a warning diagnostic. |
| if (TagType == DeclSpec::TST_struct && !Tok.is(tok::identifier) && |
| !Tok.isAnnotation()) { |
| const IdentifierInfo *II = Tok.getIdentifierInfo(); |
| // We rarely end up here so the following check is efficient. |
| if (II && II->getName().startswith("__is_")) |
| TryKeywordIdentFallback(true); |
| } |
| |
| // Parse the (optional) nested-name-specifier. |
| CXXScopeSpec &SS = DS.getTypeSpecScope(); |
| if (getLangOpts().CPlusPlus) { |
| // "FOO : BAR" is not a potential typo for "FOO::BAR". In this context it |
| // is a base-specifier-list. |
| ColonProtectionRAIIObject X(*this); |
| |
| if (ParseOptionalCXXScopeSpecifier(SS, ParsedType(), EnteringContext)) |
| DS.SetTypeSpecError(); |
| if (SS.isSet()) |
| if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) |
| Diag(Tok, diag::err_expected) << tok::identifier; |
| } |
| |
| TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams; |
| |
| // Parse the (optional) class name or simple-template-id. |
| IdentifierInfo *Name = nullptr; |
| SourceLocation NameLoc; |
| TemplateIdAnnotation *TemplateId = nullptr; |
| if (Tok.is(tok::identifier)) { |
| Name = Tok.getIdentifierInfo(); |
| NameLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::less) && getLangOpts().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) |
| << TagTokKind << 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 = nullptr; |
| const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind |
| = ParsedTemplateInfo::NonTemplate; |
| } |
| } else if (TemplateInfo.Kind |
| == ParsedTemplateInfo::ExplicitInstantiation) { |
| // Pretend this is just a forward declaration. |
| TemplateParams = nullptr; |
| 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 = takeTemplateIdAnnotation(Tok); |
| NameLoc = ConsumeToken(); |
| |
| if (TemplateId->Kind != TNK_Type_template && |
| TemplateId->Kind != TNK_Dependent_template_name) { |
| // 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()); |
| |
| // FIXME: Name may be null here. |
| Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template) |
| << TemplateId->Name << static_cast<int>(TemplateId->Kind) << Range; |
| |
| DS.SetTypeSpecError(); |
| SkipUntil(tok::semi, StopBeforeMatch); |
| return; |
| } |
| } |
| |
| // There are four options here. |
| // - If we are in a trailing return type, this is always just a reference, |
| // and we must not try to parse a definition. For instance, |
| // [] () -> struct S { }; |
| // does not define a type. |
| // - If we have 'struct foo {...', 'struct foo :...', |
| // 'struct foo final :' or 'struct foo final {', then this is a definition. |
| // - If we have 'struct foo;', then this is either a forward declaration |
| // or a friend declaration, which have to be treated differently. |
| // - Otherwise we have something like 'struct foo xyz', a reference. |
| // |
| // We also detect these erroneous cases to provide better diagnostic for |
| // C++11 attributes parsing. |
| // - attributes follow class name: |
| // struct foo [[]] {}; |
| // - attributes appear before or after 'final': |
| // struct foo [[]] final [[]] {}; |
| // |
| // However, in type-specifier-seq's, things look like declarations but are |
| // just references, e.g. |
| // new struct s; |
| // or |
| // &T::operator struct s; |
| // For these, DSC is DSC_type_specifier or DSC_alias_declaration. |
| |
| // If there are attributes after class name, parse them. |
| MaybeParseCXX11Attributes(Attributes); |
| |
| const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy(); |
| Sema::TagUseKind TUK; |
| if (DSC == DSC_trailing) |
| TUK = Sema::TUK_Reference; |
| else if (Tok.is(tok::l_brace) || |
| (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || |
| (isCXX11FinalKeyword() && |
| (NextToken().is(tok::l_brace) || NextToken().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_type) |
| << 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, StopBeforeMatch); |
| TUK = Sema::TUK_Friend; |
| } else { |
| // Okay, this is a class definition. |
| TUK = Sema::TUK_Definition; |
| } |
| } else if (isCXX11FinalKeyword() && (NextToken().is(tok::l_square) || |
| NextToken().is(tok::kw_alignas))) { |
| // We can't tell if this is a definition or reference |
| // until we skipped the 'final' and C++11 attribute specifiers. |
| TentativeParsingAction PA(*this); |
| |
| // Skip the 'final' keyword. |
| ConsumeToken(); |
| |
| // Skip C++11 attribute specifiers. |
| while (true) { |
| if (Tok.is(tok::l_square) && NextToken().is(tok::l_square)) { |
| ConsumeBracket(); |
| if (!SkipUntil(tok::r_square, StopAtSemi)) |
| break; |
| } else if (Tok.is(tok::kw_alignas) && NextToken().is(tok::l_paren)) { |
| ConsumeToken(); |
| ConsumeParen(); |
| if (!SkipUntil(tok::r_paren, StopAtSemi)) |
| break; |
| } else { |
| break; |
| } |
| } |
| |
| if (Tok.is(tok::l_brace) || Tok.is(tok::colon)) |
| TUK = Sema::TUK_Definition; |
| else |
| TUK = Sema::TUK_Reference; |
| |
| PA.Revert(); |
| } else if (!isTypeSpecifier(DSC) && |
| (Tok.is(tok::semi) || |
| (Tok.isAtStartOfLine() && !isValidAfterTypeSpecifier(false)))) { |
| TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration; |
| if (Tok.isNot(tok::semi)) { |
| const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy(); |
| // A semicolon was missing after this declaration. Diagnose and recover. |
| ExpectAndConsume(tok::semi, diag::err_expected_after, |
| DeclSpec::getSpecifierName(TagType, PPol)); |
| PP.EnterToken(Tok); |
| Tok.setKind(tok::semi); |
| } |
| } else |
| TUK = Sema::TUK_Reference; |
| |
| // Forbid misplaced attributes. In cases of a reference, we pass attributes |
| // to caller to handle. |
| if (TUK != Sema::TUK_Reference) { |
| // If this is not a reference, then the only possible |
| // valid place for C++11 attributes to appear here |
| // is between class-key and class-name. If there are |
| // any attributes after class-name, we try a fixit to move |
| // them to the right place. |
| SourceRange AttrRange = Attributes.Range; |
| if (AttrRange.isValid()) { |
| Diag(AttrRange.getBegin(), diag::err_attributes_not_allowed) |
| << AttrRange |
| << FixItHint::CreateInsertionFromRange(AttrFixitLoc, |
| CharSourceRange(AttrRange, true)) |
| << FixItHint::CreateRemoval(AttrRange); |
| |
| // Recover by adding misplaced attributes to the attribute list |
| // of the class so they can be applied on the class later. |
| attrs.takeAllFrom(Attributes); |
| } |
| } |
| |
| // If this is an elaborated type specifier, and we delayed |
| // diagnostics before, just merge them into the current pool. |
| if (shouldDelayDiagsInTag) { |
| diagsFromTag.done(); |
| if (TUK == Sema::TUK_Reference) |
| diagsFromTag.redelay(); |
| } |
| |
| 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, Policy); |
| } |
| |
| // If we are parsing a definition and stop at a base-clause, continue on |
| // until the semicolon. Continuing from the comma will just trick us into |
| // thinking we are seeing a variable declaration. |
| if (TUK == Sema::TUK_Definition && Tok.is(tok::colon)) |
| SkipUntil(tok::semi, StopBeforeMatch); |
| else |
| SkipUntil(tok::comma, StopAtSemi); |
| 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(TemplateId->getTemplateArgs(), |
| TemplateId->NumArgs); |
| if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation && |
| TUK == Sema::TUK_Declaration) { |
| // This is an explicit instantiation of a class template. |
| ProhibitAttributes(attrs); |
| |
| TagOrTempResult |
| = Actions.ActOnExplicitInstantiation(getCurScope(), |
| TemplateInfo.ExternLoc, |
| TemplateInfo.TemplateLoc, |
| TagType, |
| StartLoc, |
| SS, |
| TemplateId->Template, |
| TemplateId->TemplateNameLoc, |
| TemplateId->LAngleLoc, |
| TemplateArgsPtr, |
| TemplateId->RAngleLoc, |
| attrs.getList()); |
| |
| // 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)) { |
| ProhibitAttributes(attrs); |
| TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc, |
| TemplateId->SS, |
| TemplateId->TemplateKWLoc, |
| TemplateId->Template, |
| TemplateId->TemplateNameLoc, |
| TemplateId->LAngleLoc, |
| TemplateArgsPtr, |
| TemplateId->RAngleLoc); |
| } 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'. |
| // It this is friend declaration however, since it cannot have a |
| // template header, it is most likely that the user meant to |
| // remove the 'template' keyword. |
| assert((TUK == Sema::TUK_Definition || TUK == Sema::TUK_Friend) && |
| "Expected a definition here"); |
| |
| if (TUK == Sema::TUK_Friend) { |
| Diag(DS.getFriendSpecLoc(), diag::err_friend_explicit_instantiation); |
| TemplateParams = nullptr; |
| } else { |
| 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, nullptr, |
| 0, LAngleLoc)); |
| TemplateParams = &FakedParamLists; |
| } |
| } |
| |
| // Build the class template specialization. |
| TagOrTempResult = Actions.ActOnClassTemplateSpecialization( |
| getCurScope(), TagType, TUK, StartLoc, DS.getModulePrivateSpecLoc(), |
| *TemplateId, attrs.getList(), |
| MultiTemplateParamsArg(TemplateParams ? &(*TemplateParams)[0] |
| : nullptr, |
| TemplateParams ? TemplateParams->size() : 0)); |
| } |
| } 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; |
| // |
| ProhibitAttributes(attrs); |
| |
| TagOrTempResult |
| = Actions.ActOnExplicitInstantiation(getCurScope(), |
| TemplateInfo.ExternLoc, |
| TemplateInfo.TemplateLoc, |
| TagType, StartLoc, SS, Name, |
| NameLoc, attrs.getList()); |
| } else if (TUK == Sema::TUK_Friend && |
| TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) { |
| ProhibitAttributes(attrs); |
| |
| TagOrTempResult = |
| Actions.ActOnTemplatedFriendTag(getCurScope(), DS.getFriendSpecLoc(), |
| TagType, StartLoc, SS, |
| Name, NameLoc, attrs.getList(), |
| MultiTemplateParamsArg( |
| TemplateParams? &(*TemplateParams)[0] |
| : nullptr, |
| TemplateParams? TemplateParams->size() : 0)); |
| } else { |
| if (TUK != Sema::TUK_Declaration && TUK != Sema::TUK_Definition) |
| ProhibitAttributes(attrs); |
| |
| if (TUK == Sema::TUK_Definition && |
| TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) { |
| // If the declarator-id is not a template-id, issue a diagnostic and |
| // recover by ignoring the 'template' keyword. |
| Diag(Tok, diag::err_template_defn_explicit_instantiation) |
| << 1 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc); |
| TemplateParams = nullptr; |
| } |
| |
| 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, attrs.getList(), AS, |
| DS.getModulePrivateSpecLoc(), |
| TParams, Owned, IsDependent, |
| SourceLocation(), false, |
| clang::TypeResult(), |
| DSC == DSC_type_specifier); |
| |
| // 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) || |
| (getLangOpts().CPlusPlus && Tok.is(tok::colon)) || |
| isCXX11FinalKeyword()); |
| if (getLangOpts().CPlusPlus) |
| ParseCXXMemberSpecification(StartLoc, AttrFixitLoc, attrs, TagType, |
| TagOrTempResult.get()); |
| else |
| ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get()); |
| } |
| |
| const char *PrevSpec = nullptr; |
| unsigned DiagID; |
| bool Result; |
| if (!TypeResult.isInvalid()) { |
| Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc, |
| NameLoc.isValid() ? NameLoc : StartLoc, |
| PrevSpec, DiagID, TypeResult.get(), Policy); |
| } else if (!TagOrTempResult.isInvalid()) { |
| Result = DS.SetTypeSpecType(TagType, StartLoc, |
| NameLoc.isValid() ? NameLoc : StartLoc, |
| PrevSpec, DiagID, TagOrTempResult.get(), Owned, |
| Policy); |
| } 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. |
| // |
| // Also enforce C++ [temp]p3: |
| // In a template-declaration which defines a class, no declarator |
| // is permitted. |
| if (TUK == Sema::TUK_Definition && |
| (TemplateInfo.Kind || !isValidAfterTypeSpecifier(false))) { |
| if (Tok.isNot(tok::semi)) { |
| const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy(); |
| ExpectAndConsume(tok::semi, diag::err_expected_after, |
| DeclSpec::getSpecifierName(TagType, PPol)); |
| // 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. |
| 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, StopAtSemi | StopBeforeMatch); |
| } 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 (!TryConsumeToken(tok::comma)) |
| break; |
| } |
| |
| // 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] |
| /// attribute-specifier-seq[opt] base-type-specifier |
| /// attribute-specifier-seq[opt] 'virtual' access-specifier[opt] |
| /// base-type-specifier |
| /// attribute-specifier-seq[opt] access-specifier 'virtual'[opt] |
| /// base-type-specifier |
| Parser::BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) { |
| bool IsVirtual = false; |
| SourceLocation StartLoc = Tok.getLocation(); |
| |
| ParsedAttributesWithRange Attributes(AttrFactory); |
| MaybeParseCXX11Attributes(Attributes); |
| |
| // Parse the 'virtual' keyword. |
| if (TryConsumeToken(tok::kw_virtual)) |
| IsVirtual = true; |
| |
| CheckMisplacedCXX11Attribute(Attributes, StartLoc); |
| |
| // Parse an (optional) access specifier. |
| AccessSpecifier Access = getAccessSpecifierIfPresent(); |
| if (Access != AS_none) |
| ConsumeToken(); |
| |
| CheckMisplacedCXX11Attribute(Attributes, StartLoc); |
| |
| // 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; |
| } |
| |
| CheckMisplacedCXX11Attribute(Attributes, StartLoc); |
| |
| // Parse the class-name. |
| SourceLocation EndLocation; |
| SourceLocation BaseLoc; |
| TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation); |
| if (BaseType.isInvalid()) |
| return true; |
| |
| // Parse the optional ellipsis (for a pack expansion). The ellipsis is |
| // actually part of the base-specifier-list grammar productions, but we |
| // parse it here for convenience. |
| SourceLocation EllipsisLoc; |
| TryConsumeToken(tok::ellipsis, EllipsisLoc); |
| |
| // 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, Attributes, IsVirtual, |
| Access, BaseType.get(), BaseLoc, |
| EllipsisLoc); |
| } |
| |
| /// 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; |
| } |
| } |
| |
| /// \brief If the given declarator has any parts for which parsing has to be |
| /// delayed, e.g., default arguments, create a late-parsed method declaration |
| /// record to handle the parsing at the end of the class definition. |
| void Parser::HandleMemberFunctionDeclDelays(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 = nullptr; |
| DeclaratorChunk::FunctionTypeInfo &FTI |
| = DeclaratorInfo.getFunctionTypeInfo(); |
| |
| for (unsigned ParamIdx = 0; ParamIdx < FTI.NumParams; ++ParamIdx) { |
| if (LateMethod || FTI.Params[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.NumParams); |
| for (unsigned I = 0; I < ParamIdx; ++I) |
| LateMethod->DefaultArgs.push_back( |
| LateParsedDefaultArgument(FTI.Params[I].Param)); |
| } |
| |
| // Add this parameter to the list of parameters (it may or may |
| // not have a default argument). |
| LateMethod->DefaultArgs.push_back(LateParsedDefaultArgument( |
| FTI.Params[ParamIdx].Param, FTI.Params[ParamIdx].DefaultArgTokens)); |
| } |
| } |
| } |
| |
| /// isCXX11VirtSpecifier - Determine whether the given token is a C++11 |
| /// virt-specifier. |
| /// |
| /// virt-specifier: |
| /// override |
| /// final |
| VirtSpecifiers::Specifier Parser::isCXX11VirtSpecifier(const Token &Tok) const { |
| if (!getLangOpts().CPlusPlus || Tok.isNot(tok::identifier)) |
| return VirtSpecifiers::VS_None; |
| |
| IdentifierInfo *II = Tok.getIdentifierInfo(); |
| |
| // Initialize the contextual keywords. |
| if (!Ident_final) { |
| Ident_final = &PP.getIdentifierTable().get("final"); |
| if (getLangOpts().MicrosoftExt) |
| Ident_sealed = &PP.getIdentifierTable().get("sealed"); |
| Ident_override = &PP.getIdentifierTable().get("override"); |
| } |
| |
| if (II == Ident_override) |
| return VirtSpecifiers::VS_Override; |
| |
| if (II == Ident_sealed) |
| return VirtSpecifiers::VS_Sealed; |
| |
| if (II == Ident_final) |
| return VirtSpecifiers::VS_Final; |
| |
| return VirtSpecifiers::VS_None; |
| } |
| |
| /// ParseOptionalCXX11VirtSpecifierSeq - Parse a virt-specifier-seq. |
| /// |
| /// virt-specifier-seq: |
| /// virt-specifier |
| /// virt-specifier-seq virt-specifier |
| void Parser::ParseOptionalCXX11VirtSpecifierSeq(VirtSpecifiers &VS, |
| bool IsInterface) { |
| while (true) { |
| VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier(); |
| if (Specifier == VirtSpecifiers::VS_None) |
| return; |
| |
| // C++ [class.mem]p8: |
| // A virt-specifier-seq shall contain at most one of each virt-specifier. |
| const char *PrevSpec = nullptr; |
| if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec)) |
| Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier) |
| << PrevSpec |
| << FixItHint::CreateRemoval(Tok.getLocation()); |
| |
| if (IsInterface && (Specifier == VirtSpecifiers::VS_Final || |
| Specifier == VirtSpecifiers::VS_Sealed)) { |
| Diag(Tok.getLocation(), diag::err_override_control_interface) |
| << VirtSpecifiers::getSpecifierName(Specifier); |
| } else if (Specifier == VirtSpecifiers::VS_Sealed) { |
| Diag(Tok.getLocation(), diag::ext_ms_sealed_keyword); |
| } else { |
| Diag(Tok.getLocation(), |
| getLangOpts().CPlusPlus11 |
| ? diag::warn_cxx98_compat_override_control_keyword |
| : diag::ext_override_control_keyword) |
| << VirtSpecifiers::getSpecifierName(Specifier); |
| } |
| ConsumeToken(); |
| } |
| } |
| |
| /// isCXX11FinalKeyword - Determine whether the next token is a C++11 |
| /// 'final' or Microsoft 'sealed' contextual keyword. |
| bool Parser::isCXX11FinalKeyword() const { |
| VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier(); |
| return Specifier == VirtSpecifiers::VS_Final || |
| Specifier == VirtSpecifiers::VS_Sealed; |
| } |
| |
| /// \brief Parse a C++ member-declarator up to, but not including, the optional |
| /// brace-or-equal-initializer or pure-specifier. |
| void Parser::ParseCXXMemberDeclaratorBeforeInitializer( |
| Declarator &DeclaratorInfo, VirtSpecifiers &VS, ExprResult &BitfieldSize, |
| LateParsedAttrList &LateParsedAttrs) { |
| // member-declarator: |
| // declarator pure-specifier[opt] |
| // declarator brace-or-equal-initializer[opt] |
| // identifier[opt] ':' constant-expression |
| if (Tok.isNot(tok::colon)) |
| ParseDeclarator(DeclaratorInfo); |
| |
| if (!DeclaratorInfo.isFunctionDeclarator() && TryConsumeToken(tok::colon)) { |
| BitfieldSize = ParseConstantExpression(); |
| if (BitfieldSize.isInvalid()) |
| SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch); |
| } else |
| ParseOptionalCXX11VirtSpecifierSeq(VS, getCurrentClass().IsInterface); |
| |
| // 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, StopAtSemi | StopBeforeMatch); |
| |
| DeclaratorInfo.setAsmLabel(AsmLabel.get()); |
| DeclaratorInfo.SetRangeEnd(Loc); |
| } |
| |
| // If attributes exist after the declarator, but before an '{', parse them. |
| MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs); |
| |
| // For compatibility with code written to older Clang, also accept a |
| // virt-specifier *after* the GNU attributes. |
| // FIXME: If we saw any attributes that are known to GCC followed by a |
| // virt-specifier, issue a GCC-compat warning. |
| if (BitfieldSize.isUnset() && VS.isUnset()) |
| ParseOptionalCXX11VirtSpecifierSeq(VS, getCurrentClass().IsInterface); |
| } |
| |
| /// 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 virt-specifier-seq[opt] pure-specifier[opt] |
| /// declarator constant-initializer[opt] |
| /// [C++11] declarator brace-or-equal-initializer[opt] |
| /// identifier[opt] ':' constant-expression |
| /// |
| /// virt-specifier-seq: |
| /// virt-specifier |
| /// virt-specifier-seq virt-specifier |
| /// |
| /// virt-specifier: |
| /// override |
| /// final |
| /// [MS] sealed |
| /// |
| /// pure-specifier: |
| /// '= 0' |
| /// |
| /// constant-initializer: |
| /// '=' constant-expression |
| /// |
| void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS, |
| AttributeList *AccessAttrs, |
| const ParsedTemplateInfo &TemplateInfo, |
| ParsingDeclRAIIObject *TemplateDiags) { |
| if (Tok.is(tok::at)) { |
| if (getLangOpts().ObjC1 && NextToken().isObjCAtKeyword(tok::objc_defs)) |
| Diag(Tok, diag::err_at_defs_cxx); |
| else |
| Diag(Tok, diag::err_at_in_class); |
| |
| ConsumeToken(); |
| SkipUntil(tok::r_brace, StopAtSemi); |
| return; |
| } |
| |
| // Turn on colon protection early, while parsing declspec, although there is |
| // nothing to protect there. It prevents from false errors if error recovery |
| // incorrectly determines where the declspec ends, as in the example: |
| // struct A { enum class B { C }; }; |
| // const int C = 4; |
| // struct D { A::B : C; }; |
| ColonProtectionRAIIObject X(*this); |
| |
| // Access declarations. |
| bool MalformedTypeSpec = false; |
| if (!TemplateInfo.Kind && |
| (Tok.is(tok::identifier) || Tok.is(tok::coloncolon))) { |
| if (TryAnnotateCXXScopeToken()) |
| MalformedTypeSpec = true; |
| |
| bool isAccessDecl; |
| if (Tok.isNot(tok::annot_cxxscope)) |
| isAccessDecl = false; |
| else 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(), |
| /*EnteringContext=*/false); |
| |
| // Try to parse an unqualified-id. |
| SourceLocation TemplateKWLoc; |
| UnqualifiedId Name; |
| if (ParseUnqualifiedId(SS, false, true, true, ParsedType(), |
| TemplateKWLoc, Name)) { |
| SkipUntil(tok::semi); |
| return; |
| } |
| |
| // TODO: recover from mistakenly-qualified operator declarations. |
| if (ExpectAndConsume(tok::semi, diag::err_expected_after, |
| "access declaration")) { |
| SkipUntil(tok::semi); |
| return; |
| } |
| |
| Actions.ActOnUsingDeclaration(getCurScope(), AS, |
| /* HasUsingKeyword */ false, |
| SourceLocation(), |
| SS, Name, |
| /* AttrList */ nullptr, |
| /* HasTypenameKeyword */ false, |
| SourceLocation()); |
| return; |
| } |
| } |
| |
| // static_assert-declaration |
| if (Tok.is(tok::kw_static_assert) || 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, AccessAttrs); |
| 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, AccessAttrs, |
| TemplateInfo, TemplateDiags); |
| } |
| |
| ParsedAttributesWithRange attrs(AttrFactory); |
| ParsedAttributesWithRange FnAttrs(AttrFactory); |
| // Optional C++11 attribute-specifier |
| MaybeParseCXX11Attributes(attrs); |
| // We need to keep these attributes for future diagnostic |
| // before they are taken over by declaration specifier. |
| FnAttrs.addAll(attrs.getList()); |
| FnAttrs.Range = attrs.Range; |
| |
| MaybeParseMicrosoftAttributes(attrs); |
| |
| if (Tok.is(tok::kw_using)) { |
| ProhibitAttributes(attrs); |
| |
| // Eat 'using'. |
| SourceLocation UsingLoc = ConsumeToken(); |
| |
| if (Tok.is(tok::kw_namespace)) { |
| Diag(UsingLoc, diag::err_using_namespace_in_class); |
| SkipUntil(tok::semi, StopBeforeMatch); |
| } else { |
| SourceLocation DeclEnd; |
| // Otherwise, it must be a using-declaration or an alias-declaration. |
| ParseUsingDeclaration(Declarator::MemberContext, TemplateInfo, |
| UsingLoc, DeclEnd, AS); |
| } |
| return; |
| } |
| |
| // Hold late-parsed attributes so we can attach a Decl to them later. |
| LateParsedAttrList CommonLateParsedAttrs; |
| |
| // decl-specifier-seq: |
| // Parse the common declaration-specifiers piece. |
| ParsingDeclSpec DS(*this, TemplateDiags); |
| DS.takeAttributesFrom(attrs); |
| if (MalformedTypeSpec) |
| DS.SetTypeSpecError(); |
| |
| ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class, |
| &CommonLateParsedAttrs); |
| |
| // Turn off colon protection that was set for declspec. |
| X.restore(); |
| |
| // If we had a free-standing type definition with a missing semicolon, we |
| // may get this far before the problem becomes obvious. |
| if (DS.hasTagDefinition() && |
| TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate && |
| DiagnoseMissingSemiAfterTagDefinition(DS, AS, DSC_class, |
| &CommonLateParsedAttrs)) |
| return; |
| |
| MultiTemplateParamsArg TemplateParams( |
| TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() |
| : nullptr, |
| TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0); |
| |
| if (TryConsumeToken(tok::semi)) { |
| if (DS.isFriendSpecified()) |
| ProhibitAttributes(FnAttrs); |
| |
| Decl *TheDecl = |
| Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS, TemplateParams); |
| DS.complete(TheDecl); |
| return; |
| } |
| |
| ParsingDeclarator DeclaratorInfo(*this, DS, Declarator::MemberContext); |
| VirtSpecifiers VS; |
| |
| // Hold late-parsed attributes so we can attach a Decl to them later. |
| LateParsedAttrList LateParsedAttrs; |
| |
| SourceLocation EqualLoc; |
| bool HasInitializer = false; |
| ExprResult Init; |
| |
| SmallVector<Decl *, 8> DeclsInGroup; |
| ExprResult BitfieldSize; |
| bool ExpectSemi = true; |
| |
| // Parse the first declarator. |
| ParseCXXMemberDeclaratorBeforeInitializer(DeclaratorInfo, VS, BitfieldSize, |
| LateParsedAttrs); |
| |
| // If this has neither a name nor a bit width, something has gone seriously |
| // wrong. Skip until the semi-colon or }. |
| if (!DeclaratorInfo.hasName() && BitfieldSize.isUnset()) { |
| // If so, skip until the semi-colon or a }. |
| SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch); |
| TryConsumeToken(tok::semi); |
| return; |
| } |
| |
| // Check for a member function definition. |
| if (BitfieldSize.isUnset()) { |
| // MSVC permits pure specifier on inline functions defined at class scope. |
| // Hence check for =0 before checking for function definition. |
| if (getLangOpts().MicrosoftExt && Tok.is(tok::equal) && |
| DeclaratorInfo.isFunctionDeclarator() && |
| NextToken().is(tok::numeric_constant)) { |
| EqualLoc = ConsumeToken(); |
| Init = ParseInitializer(); |
| if (Init.isInvalid()) |
| SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch); |
| else |
| HasInitializer = true; |
| } |
| |
| FunctionDefinitionKind DefinitionKind = FDK_Declaration; |
| // function-definition: |
| // |
| // In C++11, a non-function declarator followed by an open brace is a |
| // braced-init-list for an in-class member initialization, not an |
| // erroneous function definition. |
| if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus11) { |
| DefinitionKind = FDK_Definition; |
| } else if (DeclaratorInfo.isFunctionDeclarator()) { |
| if (Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) { |
| DefinitionKind = FDK_Definition; |
| } else if (Tok.is(tok::equal)) { |
| const Token &KW = NextToken(); |
| if (KW.is(tok::kw_default)) |
| DefinitionKind = FDK_Defaulted; |
| else if (KW.is(tok::kw_delete)) |
| DefinitionKind = FDK_Deleted; |
| } |
| } |
| |
| // C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains |
| // to a friend declaration, that declaration shall be a definition. |
| if (DeclaratorInfo.isFunctionDeclarator() && |
| DefinitionKind != FDK_Definition && DS.isFriendSpecified()) { |
| // Diagnose attributes that appear before decl specifier: |
| // [[]] friend int foo(); |
| ProhibitAttributes(FnAttrs); |
| } |
| |
| if (DefinitionKind) { |
| if (!DeclaratorInfo.isFunctionDeclarator()) { |
| Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params); |
| ConsumeBrace(); |
| SkipUntil(tok::r_brace); |
| |
| // Consume the optional ';' |
| TryConsumeToken(tok::semi); |
| |
| return; |
| } |
| |
| if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) { |
| Diag(DeclaratorInfo.getIdentifierLoc(), |
| diag::err_function_declared_typedef); |
| |
| // Recover by treating the 'typedef' as spurious. |
| DS.ClearStorageClassSpecs(); |
| } |
| |
| Decl *FunDecl = |
| ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo, |
| VS, DefinitionKind, Init); |
| |
| if (FunDecl) { |
| for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) { |
| CommonLateParsedAttrs[i]->addDecl(FunDecl); |
| } |
| for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) { |
| LateParsedAttrs[i]->addDecl(FunDecl); |
| } |
| } |
| LateParsedAttrs.clear(); |
| |
| // Consume the ';' - it's optional unless we have a delete or default |
| if (Tok.is(tok::semi)) |
| ConsumeExtraSemi(AfterMemberFunctionDefinition); |
| |
| return; |
| } |
| } |
| |
| // member-declarator-list: |
| // member-declarator |
| // member-declarator-list ',' member-declarator |
| |
| while (1) { |
| InClassInitStyle HasInClassInit = ICIS_NoInit; |
| if ((Tok.is(tok::equal) || Tok.is(tok::l_brace)) && !HasInitializer) { |
| if (BitfieldSize.get()) { |
| Diag(Tok, diag::err_bitfield_member_init); |
| SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch); |
| } else { |
| HasInitializer = true; |
| if (!DeclaratorInfo.isDeclarationOfFunction() && |
| DeclaratorInfo.getDeclSpec().getStorageClassSpec() |
| != DeclSpec::SCS_typedef) |
| HasInClassInit = Tok.is(tok::equal) ? ICIS_CopyInit : ICIS_ListInit; |
| } |
| } |
| |
| // 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. |
| |
| NamedDecl *ThisDecl = nullptr; |
| if (DS.isFriendSpecified()) { |
| // C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains |
| // to a friend declaration, that declaration shall be a definition. |
| // |
| // Diagnose attributes that appear in a friend member function declarator: |
| // friend int foo [[]] (); |
| SmallVector<SourceRange, 4> Ranges; |
| DeclaratorInfo.getCXX11AttributeRanges(Ranges); |
| for (SmallVectorImpl<SourceRange>::iterator I = Ranges.begin(), |
| E = Ranges.end(); I != E; ++I) |
| Diag((*I).getBegin(), diag::err_attributes_not_allowed) << *I; |
| |
| // TODO: handle initializers, VS, bitfields, 'delete' |
| ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo, |
| TemplateParams); |
| } else { |
| ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS, |
| DeclaratorInfo, |
| TemplateParams, |
| BitfieldSize.get(), |
| VS, HasInClassInit); |
| |
| if (VarTemplateDecl *VT = |
| ThisDecl ? dyn_cast<VarTemplateDecl>(ThisDecl) : nullptr) |
| // Re-direct this decl to refer to the templated decl so that we can |
| // initialize it. |
| ThisDecl = VT->getTemplatedDecl(); |
| |
| if (ThisDecl && AccessAttrs) |
| Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs); |
| } |
| |
| // Handle the initializer. |
| if (HasInClassInit != ICIS_NoInit && |
| DeclaratorInfo.getDeclSpec().getStorageClassSpec() != |
| DeclSpec::SCS_static) { |
| // The initializer was deferred; parse it and cache the tokens. |
| Diag(Tok, getLangOpts().CPlusPlus11 |
| ? diag::warn_cxx98_compat_nonstatic_member_init |
| : diag::ext_nonstatic_member_init); |
| |
| if (DeclaratorInfo.isArrayOfUnknownBound()) { |
| // C++11 [dcl.array]p3: An array bound may also be omitted when the |
| // declarator is followed by an initializer. |
| // |
| // A brace-or-equal-initializer for a member-declarator is not an |
| // initializer in the grammar, so this is ill-formed. |
| Diag(Tok, diag::err_incomplete_array_member_init); |
| SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch); |
| |
| // Avoid later warnings about a class member of incomplete type. |
| if (ThisDecl) |
| ThisDecl->setInvalidDecl(); |
| } else |
| ParseCXXNonStaticMemberInitializer(ThisDecl); |
| } else if (HasInitializer) { |
| // Normal initializer. |
| if (!Init.isUsable()) |
| Init = ParseCXXMemberInitializer( |
| ThisDecl, DeclaratorInfo.isDeclarationOfFunction(), EqualLoc); |
| |
| if (Init.isInvalid()) |
| SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch); |
| else if (ThisDecl) |
| Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(), |
| DS.containsPlaceholderType()); |
| } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static) |
| // No initializer. |
| Actions.ActOnUninitializedDecl(ThisDecl, DS.containsPlaceholderType()); |
| |
| if (ThisDecl) { |
| if (!ThisDecl->isInvalidDecl()) { |
| // Set the Decl for any late parsed attributes |
| for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) |
| CommonLateParsedAttrs[i]->addDecl(ThisDecl); |
| |
| for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) |
| LateParsedAttrs[i]->addDecl(ThisDecl); |
| } |
| Actions.FinalizeDeclaration(ThisDecl); |
| DeclsInGroup.push_back(ThisDecl); |
| |
| if (DeclaratorInfo.isFunctionDeclarator() && |
| DeclaratorInfo.getDeclSpec().getStorageClassSpec() != |
| DeclSpec::SCS_typedef) |
| HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl); |
| } |
| LateParsedAttrs.clear(); |
| |
| DeclaratorInfo.complete(ThisDecl); |
| |
| // If we don't have a comma, it is either the end of the list (a ';') |
| // or an error, bail out. |
| SourceLocation CommaLoc; |
| if (!TryConsumeToken(tok::comma, CommaLoc)) |
| break; |
| |
| if (Tok.isAtStartOfLine() && |
| !MightBeDeclarator(Declarator::MemberContext)) { |
| // This comma was followed by a line-break and something which can't be |
| // the start of a declarator. The comma was probably a typo for a |
| // semicolon. |
| Diag(CommaLoc, diag::err_expected_semi_declaration) |
| << FixItHint::CreateReplacement(CommaLoc, ";"); |
| ExpectSemi = false; |
| break; |
| } |
| |
| // Parse the next declarator. |
| DeclaratorInfo.clear(); |
| VS.clear(); |
| BitfieldSize = true; |
| Init = true; |
| HasInitializer = false; |
| DeclaratorInfo.setCommaLoc(CommaLoc); |
| |
| // GNU attributes are allowed before the second and subsequent declarator. |
| MaybeParseGNUAttributes(DeclaratorInfo); |
| |
| ParseCXXMemberDeclaratorBeforeInitializer(DeclaratorInfo, VS, BitfieldSize, |
| LateParsedAttrs); |
| } |
| |
| if (ExpectSemi && |
| ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) { |
| // Skip to end of block or statement. |
| SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch); |
| // If we stopped at a ';', eat it. |
| TryConsumeToken(tok::semi); |
| return; |
| } |
| |
| Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup); |
| } |
| |
| /// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer or |
| /// pure-specifier. Also detect and reject any attempted defaulted/deleted |
| /// function definition. The location of the '=', if any, will be placed in |
| /// EqualLoc. |
| /// |
| /// pure-specifier: |
| /// '= 0' |
| /// |
| /// brace-or-equal-initializer: |
| /// '=' initializer-expression |
| /// braced-init-list |
| /// |
| /// initializer-clause: |
| /// assignment-expression |
| /// braced-init-list |
| /// |
| /// defaulted/deleted function-definition: |
| /// '=' 'default' |
| /// '=' 'delete' |
| /// |
| /// Prior to C++0x, the assignment-expression in an initializer-clause must |
| /// be a constant-expression. |
| ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction, |
| SourceLocation &EqualLoc) { |
| assert((Tok.is(tok::equal) || Tok.is(tok::l_brace)) |
| && "Data member initializer not starting with '=' or '{'"); |
| |
| EnterExpressionEvaluationContext Context(Actions, |
| Sema::PotentiallyEvaluated, |
| D); |
| if (TryConsumeToken(tok::equal, EqualLoc)) { |
| if (Tok.is(tok::kw_delete)) { |
| // In principle, an initializer of '= delete p;' is legal, but it will |
| // never type-check. It's better to diagnose it as an ill-formed expression |
| // than as an ill-formed deleted non-function member. |
| // An initializer of '= delete p, foo' will never be parsed, because |
| // a top-level comma always ends the initializer expression. |
| const Token &Next = NextToken(); |
| if (IsFunction || Next.is(tok::semi) || Next.is(tok::comma) || |
| Next.is(tok::eof)) { |
| if (IsFunction) |
| Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration) |
| << 1 /* delete */; |
| else |
| Diag(ConsumeToken(), diag::err_deleted_non_function); |
| return ExprError(); |
| } |
| } else if (Tok.is(tok::kw_default)) { |
| if (IsFunction) |
| Diag(Tok, diag::err_default_delete_in_multiple_declaration) |
| << 0 /* default */; |
| else |
| Diag(ConsumeToken(), diag::err_default_special_members); |
| return ExprError(); |
| } |
| |
| } |
| return ParseInitializer(); |
| } |
| |
| /// ParseCXXMemberSpecification - Parse the class definition. |
| /// |
| /// member-specification: |
| /// member-declaration member-specification[opt] |
| /// access-specifier ':' member-specification[opt] |
| /// |
| void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc, |
| SourceLocation AttrFixitLoc, |
| ParsedAttributesWithRange &Attrs, |
| unsigned TagType, Decl *TagDecl) { |
| assert((TagType == DeclSpec::TST_struct || |
| TagType == DeclSpec::TST_interface || |
| 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; |
| |
| // The Microsoft extension __interface does not permit nested classes. |
| if (getCurrentClass().IsInterface) { |
| Diag(RecordLoc, diag::err_invalid_member_in_interface) |
| << /*ErrorType=*/6 |
| << (isa<NamedDecl>(TagDecl) |
| ? cast<NamedDecl>(TagDecl)->getQualifiedNameAsString() |
| : "(anonymous)"); |
| } |
| 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, |
| TagType == DeclSpec::TST_interface); |
| |
| if (TagDecl) |
| Actions.ActOnTagStartDefinition(getCurScope(), TagDecl); |
| |
| SourceLocation FinalLoc; |
| bool IsFinalSpelledSealed = false; |
| |
| // Parse the optional 'final' keyword. |
| if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) { |
| VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier(Tok); |
| assert((Specifier == VirtSpecifiers::VS_Final || |
| Specifier == VirtSpecifiers::VS_Sealed) && |
| "not a class definition"); |
| FinalLoc = ConsumeToken(); |
| IsFinalSpelledSealed = Specifier == VirtSpecifiers::VS_Sealed; |
| |
| if (TagType == DeclSpec::TST_interface) |
| Diag(FinalLoc, diag::err_override_control_interface) |
| << VirtSpecifiers::getSpecifierName(Specifier); |
| else if (Specifier == VirtSpecifiers::VS_Final) |
| Diag(FinalLoc, getLangOpts().CPlusPlus11 |
| ? diag::warn_cxx98_compat_override_control_keyword |
| : diag::ext_override_control_keyword) |
| << VirtSpecifiers::getSpecifierName(Specifier); |
| else if (Specifier == VirtSpecifiers::VS_Sealed) |
| Diag(FinalLoc, diag::ext_ms_sealed_keyword); |
| |
| // Parse any C++11 attributes after 'final' keyword. |
| // These attributes are not allowed to appear here, |
| // and the only possible place for them to appertain |
| // to the class would be between class-key and class-name. |
| CheckMisplacedCXX11Attribute(Attrs, AttrFixitLoc); |
| } |
| |
| 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)); |
| BalancedDelimiterTracker T(*this, tok::l_brace); |
| T.consumeOpen(); |
| |
| if (TagDecl) |
| Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc, |
| IsFinalSpelledSealed, |
| T.getOpenLocation()); |
| |
| // 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; |
| ParsedAttributes AccessAttrs(AttrFactory); |
| |
| if (TagDecl) { |
| // While we still have something to read, read the member-declarations. |
| while (Tok.isNot(tok::r_brace) && !isEofOrEom()) { |
| // Each iteration of this loop reads one member-declaration. |
| |
| if (getLangOpts().MicrosoftExt && (Tok.is(tok::kw___if_exists) || |
| Tok.is(tok::kw___if_not_exists))) { |
| ParseMicrosoftIfExistsClassDeclaration((DeclSpec::TST)TagType, CurAS); |
| continue; |
| } |
| |
| // Check for extraneous top-level semicolon. |
| if (Tok.is(tok::semi)) { |
| ConsumeExtraSemi(InsideStruct, TagType); |
| continue; |
| } |
| |
| if (Tok.is(tok::annot_pragma_vis)) { |
| HandlePragmaVisibility(); |
| continue; |
| } |
| |
| if (Tok.is(tok::annot_pragma_pack)) { |
| HandlePragmaPack(); |
| continue; |
| } |
| |
| if (Tok.is(tok::annot_pragma_align)) { |
| HandlePragmaAlign(); |
| continue; |
| } |
| |
| if (Tok.is(tok::annot_pragma_openmp)) { |
| ParseOpenMPDeclarativeDirective(); |
| continue; |
| } |
| |
| if (Tok.is(tok::annot_pragma_ms_pointers_to_members)) { |
| HandlePragmaMSPointersToMembers(); |
| continue; |
| } |
| |
| if (Tok.is(tok::annot_pragma_ms_pragma)) { |
| HandlePragmaMSPragma(); |
| continue; |
| } |
| |
| // If we see a namespace here, a close brace was missing somewhere. |
| if (Tok.is(tok::kw_namespace)) { |
| DiagnoseUnexpectedNamespace(cast<NamedDecl>(TagDecl)); |
| break; |
| } |
| |
| AccessSpecifier AS = getAccessSpecifierIfPresent(); |
| if (AS != AS_none) { |
| // Current token is a C++ access specifier. |
| CurAS = AS; |
| SourceLocation ASLoc = Tok.getLocation(); |
| unsigned TokLength = Tok.getLength(); |
| ConsumeToken(); |
| AccessAttrs.clear(); |
| MaybeParseGNUAttributes(AccessAttrs); |
| |
| SourceLocation EndLoc; |
| if (TryConsumeToken(tok::colon, EndLoc)) { |
| } else if (TryConsumeToken(tok::semi, EndLoc)) { |
| Diag(EndLoc, diag::err_expected) |
| << tok::colon << FixItHint::CreateReplacement(EndLoc, ":"); |
| } else { |
| EndLoc = ASLoc.getLocWithOffset(TokLength); |
| Diag(EndLoc, diag::err_expected) |
| << tok::colon << FixItHint::CreateInsertion(EndLoc, ":"); |
| } |
| |
| // The Microsoft extension __interface does not permit non-public |
| // access specifiers. |
| if (TagType == DeclSpec::TST_interface && CurAS != AS_public) { |
| Diag(ASLoc, diag::err_access_specifier_interface) |
| << (CurAS == AS_protected); |
| } |
| |
| if (Actions.ActOnAccessSpecifier(AS, ASLoc, EndLoc, |
| AccessAttrs.getList())) { |
| // found another attribute than only annotations |
| AccessAttrs.clear(); |
| } |
| |
| continue; |
| } |
| |
| // Parse all the comma separated declarators. |
| ParseCXXClassMemberDeclaration(CurAS, AccessAttrs.getList()); |
| } |
| |
| T.consumeClose(); |
| } else { |
| SkipUntil(tok::r_brace); |
| } |
| |
| // If attributes exist after class contents, parse them. |
| ParsedAttributes attrs(AttrFactory); |
| MaybeParseGNUAttributes(attrs); |
| |
| if (TagDecl) |
| Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl, |
| T.getOpenLocation(), |
| T.getCloseLocation(), |
| attrs.getList()); |
| |
| // C++11 [class.mem]p2: |
| // Within the class member-specification, the class is regarded as complete |
| // within function bodies, default arguments, and |
| // brace-or-equal-initializers for non-static data members (including such |
| // things in nested classes). |
| 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, along with any |
| // delayed attributes. |
| SourceLocation SavedPrevTokLocation = PrevTokLocation; |
| ParseLexedAttributes(getCurrentClass()); |
| ParseLexedMethodDeclarations(getCurrentClass()); |
| |
| // We've finished with all pending member declarations. |
| Actions.ActOnFinishCXXMemberDecls(); |
| |
| ParseLexedMemberInitializers(getCurrentClass()); |
| ParseLexedMethodDefs(getCurrentClass()); |
| PrevTokLocation = SavedPrevTokLocation; |
| } |
| |
| if (TagDecl) |
| Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, |
| T.getCloseLocation()); |
| |
| // Leave the class scope. |
| ParsingDef.Pop(); |
| ClassScope.Exit(); |
| } |
| |
| void Parser::DiagnoseUnexpectedNamespace(NamedDecl *D) { |
| assert(Tok.is(tok::kw_namespace)); |
| |
| // FIXME: Suggest where the close brace should have gone by looking |
| // at indentation changes within the definition body. |
| Diag(D->getLocation(), |
| diag::err_missing_end_of_definition) << D; |
| Diag(Tok.getLocation(), |
| diag::note_missing_end_of_definition_before) << D; |
| |
| // Push '};' onto the token stream to recover. |
| PP.EnterToken(Tok); |
| |
| Tok.startToken(); |
| Tok.setLocation(PP.getLocForEndOfToken(PrevTokLocation)); |
| Tok.setKind(tok::semi); |
| PP.EnterToken(Tok); |
| |
| Tok.setKind(tok::r_brace); |
| } |
| |
| /// 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 ...[opt] |
| /// mem-initializer ...[opt] , mem-initializer-list |
| void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) { |
| assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'"); |
| |
| // Poison the SEH identifiers so they are flagged as illegal in constructor initializers |
| PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true); |
| SourceLocation ColonLoc = ConsumeToken(); |
| |
| SmallVector<CXXCtorInitializer*, 4> MemInitializers; |
| bool AnyErrors = false; |
| |
| do { |
| if (Tok.is(tok::code_completion)) { |
| Actions.CodeCompleteConstructorInitializer(ConstructorDecl, |
| MemInitializers); |
| return cutOffParsing(); |
| } 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_either) << tok::l_brace |
| << tok::comma; |
| SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch); |
| break; |
| } |
| } while (true); |
| |
| Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, MemInitializers, |
| 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++0x] mem-initializer-id braced-init-list |
| /// |
| /// [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(), /*EnteringContext=*/false); |
| ParsedType TemplateTypeTy; |
| if (Tok.is(tok::annot_template_id)) { |
| TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok); |
| if (TemplateId->Kind == TNK_Type_template || |
| TemplateId->Kind == TNK_Dependent_template_name) { |
| AnnotateTemplateIdTokenAsType(); |
| assert(Tok.is(tok::annot_typename) && "template-id -> type failed"); |
| TemplateTypeTy = getTypeAnnotation(Tok); |
| } |
| } |
| // Uses of decltype will already have been converted to annot_decltype by |
| // ParseOptionalCXXScopeSpecifier at this point. |
| if (!TemplateTypeTy && Tok.isNot(tok::identifier) |
| && Tok.isNot(tok::annot_decltype)) { |
| Diag(Tok, diag::err_expected_member_or_base_name); |
| return true; |
| } |
| |
| IdentifierInfo *II = nullptr; |
| DeclSpec DS(AttrFactory); |
| |