summaryrefslogtreecommitdiff
path: root/clang/lib/Parse/ParseDeclCXX.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'clang/lib/Parse/ParseDeclCXX.cpp')
-rw-r--r--clang/lib/Parse/ParseDeclCXX.cpp3020
1 files changed, 3020 insertions, 0 deletions
diff --git a/clang/lib/Parse/ParseDeclCXX.cpp b/clang/lib/Parse/ParseDeclCXX.cpp
new file mode 100644
index 0000000..5e6c4f5
--- /dev/null
+++ b/clang/lib/Parse/ParseDeclCXX.cpp
@@ -0,0 +1,3020 @@
+//===--- ParseDeclCXX.cpp - C++ Declaration Parsing -----------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the C++ Declaration portions of the Parser interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/OperatorKinds.h"
+#include "clang/Parse/Parser.h"
+#include "clang/Parse/ParseDiagnostic.h"
+#include "clang/Sema/DeclSpec.h"
+#include "clang/Sema/Scope.h"
+#include "clang/Sema/ParsedTemplate.h"
+#include "clang/Sema/PrettyDeclStackTrace.h"
+#include "llvm/ADT/SmallString.h"
+#include "RAIIObjectsForParser.h"
+using namespace clang;
+
+/// ParseNamespace - We know that the current token is a namespace keyword. This
+/// may either be a top level namespace or a block-level namespace alias. If
+/// there was an inline keyword, it has already been parsed.
+///
+/// namespace-definition: [C++ 7.3: basic.namespace]
+/// named-namespace-definition
+/// unnamed-namespace-definition
+///
+/// unnamed-namespace-definition:
+/// 'inline'[opt] 'namespace' attributes[opt] '{' namespace-body '}'
+///
+/// named-namespace-definition:
+/// original-namespace-definition
+/// extension-namespace-definition
+///
+/// original-namespace-definition:
+/// 'inline'[opt] 'namespace' identifier attributes[opt]
+/// '{' namespace-body '}'
+///
+/// extension-namespace-definition:
+/// 'inline'[opt] 'namespace' original-namespace-name
+/// '{' namespace-body '}'
+///
+/// namespace-alias-definition: [C++ 7.3.2: namespace.alias]
+/// 'namespace' identifier '=' qualified-namespace-specifier ';'
+///
+Decl *Parser::ParseNamespace(unsigned Context,
+ SourceLocation &DeclEnd,
+ SourceLocation InlineLoc) {
+ assert(Tok.is(tok::kw_namespace) && "Not a namespace!");
+ SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'.
+ ObjCDeclContextSwitch ObjCDC(*this);
+
+ if (Tok.is(tok::code_completion)) {
+ Actions.CodeCompleteNamespaceDecl(getCurScope());
+ cutOffParsing();
+ return 0;
+ }
+
+ SourceLocation IdentLoc;
+ IdentifierInfo *Ident = 0;
+ 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 (!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());
+ }
+ Diag(Tok, Ident ? diag::err_expected_lbrace :
+ diag::err_expected_ident_lbrace);
+ return 0;
+ }
+
+ 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, false);
+ return 0;
+ }
+
+ if (!ExtraIdent.empty()) {
+ TentativeParsingAction TPA(*this);
+ SkipUntil(tok::r_brace, /*StopAtSemi*/false, /*DontConsume*/true);
+ 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().CPlusPlus0x ?
+ 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) && Tok.isNot(tok::eof)) {
+ ParsedAttributesWithRange attrs(AttrFactory);
+ MaybeParseCXX0XAttributes(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 0;
+ }
+
+ 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 0;
+ }
+
+ // Parse identifier.
+ IdentifierInfo *Ident = Tok.getIdentifierInfo();
+ SourceLocation IdentLoc = ConsumeToken();
+
+ // Eat the ';'.
+ DeclEnd = Tok.getLocation();
+ ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name,
+ "", tok::semi);
+
+ return Actions.ActOnNamespaceAliasDef(getCurScope(), NamespaceLoc, AliasLoc, Alias,
+ SS, IdentLoc, Ident);
+}
+
+/// ParseLinkage - We know that the current token is a string_literal
+/// and just before that, that extern was seen.
+///
+/// linkage-specification: [C++ 7.5p2: dcl.link]
+/// 'extern' string-literal '{' declaration-seq[opt] '}'
+/// 'extern' string-literal declaration
+///
+Decl *Parser::ParseLinkage(ParsingDeclSpec &DS, unsigned Context) {
+ assert(Tok.is(tok::string_literal) && "Not a string literal!");
+ SmallString<8> LangBuffer;
+ bool Invalid = false;
+ StringRef Lang = PP.getSpelling(Tok, LangBuffer, &Invalid);
+ if (Invalid)
+ return 0;
+
+ // FIXME: This is incorrect: linkage-specifiers are parsed in translation
+ // phase 7, so string-literal concatenation is supposed to occur.
+ // extern "" "C" "" "+" "+" { } is legal.
+ if (Tok.hasUDSuffix())
+ Diag(Tok, diag::err_invalid_string_udl);
+ SourceLocation Loc = ConsumeStringToken();
+
+ ParseScope LinkageScope(this, Scope::DeclScope);
+ Decl *LinkageSpec
+ = Actions.ActOnStartLinkageSpecification(getCurScope(),
+ DS.getSourceRange().getBegin(),
+ Loc, Lang,
+ Tok.is(tok::l_brace) ? Tok.getLocation()
+ : SourceLocation());
+
+ ParsedAttributesWithRange attrs(AttrFactory);
+ MaybeParseCXX0XAttributes(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 Actions.ActOnFinishLinkageSpecification(getCurScope(), LinkageSpec,
+ SourceLocation());
+ }
+
+ DS.abort();
+
+ ProhibitAttributes(attrs);
+
+ BalancedDelimiterTracker T(*this, tok::l_brace);
+ T.consumeOpen();
+ while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
+ ParsedAttributesWithRange attrs(AttrFactory);
+ MaybeParseCXX0XAttributes(attrs);
+ MaybeParseMicrosoftAttributes(attrs);
+ ParseExternalDeclaration(attrs);
+ }
+
+ T.consumeClose();
+ return Actions.ActOnFinishLinkageSpecification(getCurScope(), LinkageSpec,
+ T.getCloseLocation());
+}
+
+/// 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 0;
+ }
+
+ // '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 0;
+ }
+
+ CXXScopeSpec SS;
+ // Parse (optional) nested-name-specifier.
+ ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
+
+ IdentifierInfo *NamespcName = 0;
+ SourceLocation IdentLoc = SourceLocation();
+
+ // Parse namespace-name.
+ if (SS.isInvalid() || Tok.isNot(tok::identifier)) {
+ Diag(Tok, diag::err_expected_namespace_name);
+ // If there was invalid namespace name, skip to end of decl, and eat ';'.
+ SkipUntil(tok::semi);
+ // FIXME: Are there cases, when we would like to call ActOnUsingDirective?
+ return 0;
+ }
+
+ // Parse identifier.
+ NamespcName = Tok.getIdentifierInfo();
+ IdentLoc = ConsumeToken();
+
+ // Parse (optional) attributes (most likely GNU strong-using extension).
+ bool GNUAttr = false;
+ if (Tok.is(tok::kw___attribute)) {
+ GNUAttr = true;
+ ParseGNUAttributes(attrs);
+ }
+
+ // Eat ';'.
+ DeclEnd = Tok.getLocation();
+ ExpectAndConsume(tok::semi,
+ GNUAttr ? diag::err_expected_semi_after_attribute_list
+ : diag::err_expected_semi_after_namespace_name,
+ "", tok::semi);
+
+ return Actions.ActOnUsingDirective(getCurScope(), UsingLoc, NamespcLoc, SS,
+ IdentLoc, NamespcName, 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++0x [decl.typedef]p2
+/// 'using' identifier = type-id ;
+///
+Decl *Parser::ParseUsingDeclaration(unsigned Context,
+ const ParsedTemplateInfo &TemplateInfo,
+ SourceLocation UsingLoc,
+ SourceLocation &DeclEnd,
+ AccessSpecifier AS,
+ Decl **OwnedType) {
+ CXXScopeSpec SS;
+ SourceLocation TypenameLoc;
+ bool IsTypeName;
+
+ // Ignore optional 'typename'.
+ // FIXME: This is wrong; we should parse this as a typename-specifier.
+ if (Tok.is(tok::kw_typename)) {
+ TypenameLoc = Tok.getLocation();
+ ConsumeToken();
+ IsTypeName = true;
+ }
+ else
+ IsTypeName = false;
+
+ // Parse nested-name-specifier.
+ ParseOptionalCXXScopeSpecifier(SS, ParsedType(), /*EnteringContext=*/false);
+
+ // Check nested-name specifier.
+ if (SS.isInvalid()) {
+ SkipUntil(tok::semi);
+ return 0;
+ }
+
+ // Parse the unqualified-id. We allow parsing of both constructor and
+ // destructor names and allow the action module to diagnose any semantic
+ // errors.
+ SourceLocation TemplateKWLoc;
+ UnqualifiedId Name;
+ if (ParseUnqualifiedId(SS,
+ /*EnteringContext=*/false,
+ /*AllowDestructorName=*/true,
+ /*AllowConstructorName=*/true,
+ ParsedType(),
+ TemplateKWLoc,
+ Name)) {
+ SkipUntil(tok::semi);
+ return 0;
+ }
+
+ ParsedAttributes attrs(AttrFactory);
+
+ // Maybe this is an alias-declaration.
+ bool IsAliasDecl = Tok.is(tok::equal);
+ TypeResult TypeAlias;
+ if (IsAliasDecl) {
+ // TODO: Attribute support. C++0x attributes may appear before the equals.
+ // Where can GNU attributes appear?
+ ConsumeToken();
+
+ Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ?
+ 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 0;
+ }
+
+ // 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 0;
+ } else if (IsTypeName)
+ 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(0, TemplateInfo.Kind ?
+ Declarator::AliasTemplateContext :
+ Declarator::AliasDeclContext, AS, OwnedType);
+ } else
+ // Parse (optional) attributes (most likely GNU strong-using extension).
+ MaybeParseGNUAttributes(attrs);
+
+ // Eat ';'.
+ DeclEnd = Tok.getLocation();
+ ExpectAndConsume(tok::semi, diag::err_expected_semi_after,
+ !attrs.empty() ? "attributes list" :
+ IsAliasDecl ? "alias declaration" : "using declaration",
+ tok::semi);
+
+ // Diagnose an attempt to declare a templated using-declaration.
+ // In C++0x, 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 0;
+ }
+
+ // "typename" keyword is allowed for identifiers only,
+ // because it may be a type definition.
+ if (IsTypeName && Name.getKind() != UnqualifiedId::IK_Identifier) {
+ Diag(Name.getSourceRange().getBegin(), diag::err_typename_identifiers_only)
+ << FixItHint::CreateRemoval(SourceRange(TypenameLoc));
+ // Proceed parsing, but reset the IsTypeName flag.
+ IsTypeName = false;
+ }
+
+ if (IsAliasDecl) {
+ TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
+ MultiTemplateParamsArg TemplateParamsArg(Actions,
+ TemplateParams ? TemplateParams->data() : 0,
+ TemplateParams ? TemplateParams->size() : 0);
+ return Actions.ActOnAliasDeclaration(getCurScope(), AS, TemplateParamsArg,
+ UsingLoc, Name, TypeAlias);
+ }
+
+ return Actions.ActOnUsingDeclaration(getCurScope(), AS, true, UsingLoc, SS,
+ Name, attrs.getList(),
+ IsTypeName, 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_lparen);
+ return 0;
+ }
+
+ ExprResult AssertExpr(ParseConstantExpression());
+ if (AssertExpr.isInvalid()) {
+ SkipUntil(tok::semi);
+ return 0;
+ }
+
+ if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi))
+ return 0;
+
+ if (!isTokenStringLiteral()) {
+ Diag(Tok, diag::err_expected_string_literal);
+ SkipUntil(tok::semi);
+ return 0;
+ }
+
+ ExprResult AssertMessage(ParseStringLiteralExpression());
+ if (AssertMessage.isInvalid()) {
+ SkipUntil(tok::semi);
+ return 0;
+ }
+
+ T.consumeClose();
+
+ DeclEnd = Tok.getLocation();
+ ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert);
+
+ return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc,
+ AssertExpr.take(),
+ AssertMessage.take(),
+ T.getCloseLocation());
+}
+
+/// ParseDecltypeSpecifier - Parse a C++0x decltype specifier.
+///
+/// 'decltype' ( expression )
+///
+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();
+ }
+
+ // Parse the expression
+
+ // C++0x [dcl.type.simple]p4:
+ // The operand of the decltype specifier is an unevaluated operand.
+ EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated,
+ 0, /*IsDecltype=*/true);
+ Result = ParseExpression();
+ if (Result.isInvalid()) {
+ SkipUntil(tok::r_paren);
+ DS.SetTypeSpecError();
+ return StartLoc;
+ }
+
+ // 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();
+ }
+
+ Result = Actions.ActOnDecltypeExpression(Result.take());
+ if (Result.isInvalid()) {
+ DS.SetTypeSpecError();
+ return T.getCloseLocation();
+ }
+
+ EndLoc = T.getCloseLocation();
+ }
+
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ // Check for duplicate type specifiers (e.g. "int decltype(a)").
+ if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec,
+ DiagID, Result.release())) {
+ Diag(StartLoc, DiagID) << PrevSpec;
+ 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() : ExprResult());
+ 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);
+ return;
+ }
+
+ // Match the ')'
+ T.consumeClose();
+ if (T.getCloseLocation().isInvalid())
+ return;
+
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ if (DS.SetTypeSpecType(DeclSpec::TST_underlyingType, StartLoc, PrevSpec,
+ DiagID, Result.release()))
+ Diag(StartLoc, DiagID) << PrevSpec;
+}
+
+/// 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++ 10.1]
+/// class-or-decltype
+/// class-or-decltype: [C++ 10.1]
+/// nested-name-specifier[opt] class-name
+/// decltype-specifier
+/// class-name: [C++ 9.1]
+/// identifier
+/// simple-template-id
+///
+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)
+ 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.
+ ParsedType Type = Actions.getTypeName(*Id, IdLoc, getCurScope(), &SS, true,
+ false, ParsedType(),
+ /*IsCtorOrDtorName=*/false,
+ /*NonTrivialTypeSourceInfo=*/true);
+ if (!Type) {
+ Diag(IdLoc, diag::err_expected_class_name);
+ return true;
+ }
+
+ // Consume the identifier.
+ EndLocation = IdLoc;
+
+ // Fake up a Declarator to use with ActOnTypeName.
+ DeclSpec DS(AttrFactory);
+ DS.SetRangeStart(IdLoc);
+ DS.SetRangeEnd(EndLocation);
+ DS.getTypeSpecScope() = SS;
+
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type);
+
+ Declarator DeclaratorInfo(DS, Declarator::TypeNameContext);
+ return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
+}
+
+/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or
+/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which
+/// until we reach the start of a definition or see a token that
+/// cannot start a definition.
+///
+/// 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) {
+ DeclSpec::TST TagType;
+ if (TagTokKind == tok::kw_struct)
+ TagType = DeclSpec::TST_struct;
+ else if (TagTokKind == tok::kw_class)
+ TagType = DeclSpec::TST_class;
+ else {
+ assert(TagTokKind == tok::kw_union && "Not a class specifier");
+ TagType = DeclSpec::TST_union;
+ }
+
+ if (Tok.is(tok::code_completion)) {
+ // Code completion for a struct, class, or union name.
+ Actions.CodeCompleteTag(getCurScope(), TagType);
+ 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.
+ Sema::SuppressAccessChecksRAII SuppressAccess(Actions,
+ TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
+ TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
+
+ ParsedAttributes attrs(AttrFactory);
+ // If attributes exist after tag, parse them.
+ if (Tok.is(tok::kw___attribute))
+ ParseGNUAttributes(attrs);
+
+ // If declspecs exist after tag, parse them.
+ while (Tok.is(tok::kw___declspec))
+ ParseMicrosoftDeclSpec(attrs);
+
+ // If C++0x attributes exist here, parse them.
+ // FIXME: Are we consistent with the ordering of parsing of different
+ // styles of attributes?
+ MaybeParseCXX0XAttributes(attrs);
+
+ if (TagType == DeclSpec::TST_struct &&
+ !Tok.is(tok::identifier) &&
+ Tok.getIdentifierInfo() &&
+ (Tok.is(tok::kw___is_arithmetic) ||
+ Tok.is(tok::kw___is_convertible) ||
+ Tok.is(tok::kw___is_empty) ||
+ Tok.is(tok::kw___is_floating_point) ||
+ Tok.is(tok::kw___is_function) ||
+ Tok.is(tok::kw___is_fundamental) ||
+ Tok.is(tok::kw___is_integral) ||
+ Tok.is(tok::kw___is_member_function_pointer) ||
+ Tok.is(tok::kw___is_member_pointer) ||
+ Tok.is(tok::kw___is_pod) ||
+ Tok.is(tok::kw___is_pointer) ||
+ Tok.is(tok::kw___is_same) ||
+ Tok.is(tok::kw___is_scalar) ||
+ Tok.is(tok::kw___is_signed) ||
+ Tok.is(tok::kw___is_unsigned) ||
+ Tok.is(tok::kw___is_void))) {
+ // GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the
+ // name of struct templates, but some are keywords in GCC >= 4.3
+ // and Clang. Therefore, when we see the token sequence "struct
+ // X", make X into a normal identifier rather than a keyword, to
+ // allow libstdc++ 4.2 and libc++ to work properly.
+ Tok.getIdentifierInfo()->RevertTokenIDToIdentifier();
+ Tok.setKind(tok::identifier);
+ }
+
+ // Parse the (optional) nested-name-specifier.
+ CXXScopeSpec &SS = DS.getTypeSpecScope();
+ if (getLangOpts().CPlusPlus) {
+ // "FOO : BAR" is not a potential typo for "FOO::BAR".
+ 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_ident);
+ }
+
+ TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
+
+ // Parse the (optional) class name or simple-template-id.
+ IdentifierInfo *Name = 0;
+ SourceLocation NameLoc;
+ TemplateIdAnnotation *TemplateId = 0;
+ if (Tok.is(tok::identifier)) {
+ Name = Tok.getIdentifierInfo();
+ NameLoc = ConsumeToken();
+
+ if (Tok.is(tok::less) && 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)
+ << (TagType == DeclSpec::TST_class? 0
+ : TagType == DeclSpec::TST_struct? 1
+ : 2)
+ << Name
+ << SourceRange(LAngleLoc, RAngleLoc);
+
+ // Strip off the last template parameter list if it was empty, since
+ // we've removed its template argument list.
+ if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) {
+ if (TemplateParams && TemplateParams->size() > 1) {
+ TemplateParams->pop_back();
+ } else {
+ TemplateParams = 0;
+ const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind
+ = ParsedTemplateInfo::NonTemplate;
+ }
+ } else if (TemplateInfo.Kind
+ == ParsedTemplateInfo::ExplicitInstantiation) {
+ // Pretend this is just a forward declaration.
+ TemplateParams = 0;
+ const_cast<ParsedTemplateInfo&>(TemplateInfo).Kind
+ = ParsedTemplateInfo::NonTemplate;
+ const_cast<ParsedTemplateInfo&>(TemplateInfo).TemplateLoc
+ = SourceLocation();
+ const_cast<ParsedTemplateInfo&>(TemplateInfo).ExternLoc
+ = SourceLocation();
+ }
+ }
+ } else if (Tok.is(tok::annot_template_id)) {
+ TemplateId = 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());
+
+ Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template)
+ << Name << static_cast<int>(TemplateId->Kind) << Range;
+
+ DS.SetTypeSpecError();
+ SkipUntil(tok::semi, false, true);
+ return;
+ }
+ }
+
+ // As soon as we're finished parsing the class's template-id, turn access
+ // checking back on.
+ SuppressAccess.done();
+
+ // 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.
+ // 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.
+ Sema::TagUseKind TUK;
+ if (DSC == DSC_trailing)
+ TUK = Sema::TUK_Reference;
+ else if (Tok.is(tok::l_brace) ||
+ (getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
+ (isCXX0XFinalKeyword() &&
+ (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, true, true);
+ TUK = Sema::TUK_Friend;
+ } else {
+ // Okay, this is a class definition.
+ TUK = Sema::TUK_Definition;
+ }
+ } else if (Tok.is(tok::semi) && DSC != DSC_type_specifier)
+ TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration;
+ else
+ TUK = Sema::TUK_Reference;
+
+ if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error ||
+ TUK != Sema::TUK_Definition)) {
+ if (DS.getTypeSpecType() != DeclSpec::TST_error) {
+ // We have a declaration or reference to an anonymous class.
+ Diag(StartLoc, diag::err_anon_type_definition)
+ << DeclSpec::getSpecifierName(TagType);
+ }
+
+ SkipUntil(tok::comma, true);
+ return;
+ }
+
+ // Create the tag portion of the class or class template.
+ DeclResult TagOrTempResult = true; // invalid
+ TypeResult TypeResult = true; // invalid
+
+ bool Owned = false;
+ if (TemplateId) {
+ // Explicit specialization, class template partial specialization,
+ // or explicit instantiation.
+ ASTTemplateArgsPtr TemplateArgsPtr(Actions,
+ TemplateId->getTemplateArgs(),
+ TemplateId->NumArgs);
+ if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
+ TUK == Sema::TUK_Declaration) {
+ // This is an explicit instantiation of a class template.
+ TagOrTempResult
+ = Actions.ActOnExplicitInstantiation(getCurScope(),
+ TemplateInfo.ExternLoc,
+ TemplateInfo.TemplateLoc,
+ TagType,
+ StartLoc,
+ SS,
+ TemplateId->Template,
+ TemplateId->TemplateNameLoc,
+ TemplateId->LAngleLoc,
+ TemplateArgsPtr,
+ TemplateId->RAngleLoc,
+ 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)) {
+ 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'.
+ assert(TUK == Sema::TUK_Definition && "Expected a definition here");
+
+ SourceLocation LAngleLoc
+ = PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
+ Diag(TemplateId->TemplateNameLoc,
+ diag::err_explicit_instantiation_with_definition)
+ << SourceRange(TemplateInfo.TemplateLoc)
+ << FixItHint::CreateInsertion(LAngleLoc, "<>");
+
+ // Create a fake template parameter list that contains only
+ // "template<>", so that we treat this construct as a class
+ // template specialization.
+ FakedParamLists.push_back(
+ Actions.ActOnTemplateParameterList(0, SourceLocation(),
+ TemplateInfo.TemplateLoc,
+ LAngleLoc,
+ 0, 0,
+ LAngleLoc));
+ TemplateParams = &FakedParamLists;
+ }
+
+ // Build the class template specialization.
+ TagOrTempResult
+ = Actions.ActOnClassTemplateSpecialization(getCurScope(), TagType, TUK,
+ StartLoc, DS.getModulePrivateSpecLoc(), SS,
+ TemplateId->Template,
+ TemplateId->TemplateNameLoc,
+ TemplateId->LAngleLoc,
+ TemplateArgsPtr,
+ TemplateId->RAngleLoc,
+ attrs.getList(),
+ MultiTemplateParamsArg(Actions,
+ TemplateParams? &(*TemplateParams)[0] : 0,
+ 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;
+ //
+ 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) {
+ TagOrTempResult =
+ Actions.ActOnTemplatedFriendTag(getCurScope(), DS.getFriendSpecLoc(),
+ TagType, StartLoc, SS,
+ Name, NameLoc, attrs.getList(),
+ MultiTemplateParamsArg(Actions,
+ TemplateParams? &(*TemplateParams)[0] : 0,
+ TemplateParams? TemplateParams->size() : 0));
+ } else {
+ if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
+ TUK == Sema::TUK_Definition) {
+ // FIXME: Diagnose this particular error.
+ }
+
+ bool IsDependent = false;
+
+ // Don't pass down template parameter lists if this is just a tag
+ // reference. For example, we don't need the template parameters here:
+ // template <class T> class A *makeA(T t);
+ MultiTemplateParamsArg TParams;
+ if (TUK != Sema::TUK_Reference && TemplateParams)
+ TParams =
+ MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size());
+
+ // Declaration or definition of a class type
+ TagOrTempResult = Actions.ActOnTag(getCurScope(), TagType, TUK, StartLoc,
+ SS, Name, NameLoc, attrs.getList(), AS,
+ DS.getModulePrivateSpecLoc(),
+ TParams, Owned, IsDependent,
+ SourceLocation(), false,
+ clang::TypeResult());
+
+ // If ActOnTag said the type was dependent, try again with the
+ // less common call.
+ if (IsDependent) {
+ assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend);
+ TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK,
+ SS, Name, StartLoc, NameLoc);
+ }
+ }
+
+ // If there is a body, parse it and inform the actions module.
+ if (TUK == Sema::TUK_Definition) {
+ assert(Tok.is(tok::l_brace) ||
+ (getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
+ isCXX0XFinalKeyword());
+ if (getLangOpts().CPlusPlus)
+ ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get());
+ else
+ ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get());
+ }
+
+ const char *PrevSpec = 0;
+ unsigned DiagID;
+ bool Result;
+ if (!TypeResult.isInvalid()) {
+ Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
+ NameLoc.isValid() ? NameLoc : StartLoc,
+ PrevSpec, DiagID, TypeResult.get());
+ } else if (!TagOrTempResult.isInvalid()) {
+ Result = DS.SetTypeSpecType(TagType, StartLoc,
+ NameLoc.isValid() ? NameLoc : StartLoc,
+ PrevSpec, DiagID, TagOrTempResult.get(), Owned);
+ } else {
+ DS.SetTypeSpecError();
+ return;
+ }
+
+ if (Result)
+ Diag(StartLoc, DiagID) << PrevSpec;
+
+ // At this point, we've successfully parsed a class-specifier in 'definition'
+ // form (e.g. "struct foo { int x; }". While we could just return here, we're
+ // going to look at what comes after it to improve error recovery. If an
+ // impossible token occurs next, we assume that the programmer forgot a ; at
+ // the end of the declaration and recover that way.
+ //
+ // This switch enumerates the valid "follow" set for definition.
+ if (TUK == Sema::TUK_Definition) {
+ bool ExpectedSemi = true;
+ switch (Tok.getKind()) {
+ default: break;
+ case tok::semi: // struct foo {...} ;
+ case tok::star: // struct foo {...} * P;
+ case tok::amp: // struct foo {...} & R = ...
+ case tok::identifier: // struct foo {...} V ;
+ case tok::r_paren: //(struct foo {...} ) {4}
+ case tok::annot_cxxscope: // struct foo {...} a:: b;
+ case tok::annot_typename: // struct foo {...} a ::b;
+ case tok::annot_template_id: // struct foo {...} a<int> ::b;
+ case tok::l_paren: // struct foo {...} ( x);
+ case tok::comma: // __builtin_offsetof(struct foo{...} ,
+ ExpectedSemi = false;
+ break;
+ // Type qualifiers
+ case tok::kw_const: // struct foo {...} const x;
+ case tok::kw_volatile: // struct foo {...} volatile x;
+ case tok::kw_restrict: // struct foo {...} restrict x;
+ case tok::kw_inline: // struct foo {...} inline foo() {};
+ // Storage-class specifiers
+ case tok::kw_static: // struct foo {...} static x;
+ case tok::kw_extern: // struct foo {...} extern x;
+ case tok::kw_typedef: // struct foo {...} typedef x;
+ case tok::kw_register: // struct foo {...} register x;
+ case tok::kw_auto: // struct foo {...} auto x;
+ case tok::kw_mutable: // struct foo {...} mutable x;
+ 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()))
+ ExpectedSemi = false;
+ break;
+
+ case tok::r_brace: // struct bar { struct foo {...} }
+ // Missing ';' at end of struct is accepted as an extension in C mode.
+ if (!getLangOpts().CPlusPlus)
+ ExpectedSemi = false;
+ break;
+ }
+
+ // C++ [temp]p3 In a template-declaration which defines a class, no
+ // declarator is permitted.
+ if (TemplateInfo.Kind)
+ ExpectedSemi = true;
+
+ if (ExpectedSemi) {
+ ExpectAndConsume(tok::semi, diag::err_expected_semi_after_tagdecl,
+ TagType == DeclSpec::TST_class ? "class"
+ : TagType == DeclSpec::TST_struct? "struct" : "union");
+ // Push this token back into the preprocessor and change our current token
+ // to ';' so that the rest of the code recovers as though there were an
+ // ';' after the definition.
+ PP.EnterToken(Tok);
+ Tok.setKind(tok::semi);
+ }
+ }
+}
+
+/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived].
+///
+/// base-clause : [C++ class.derived]
+/// ':' base-specifier-list
+/// base-specifier-list:
+/// base-specifier '...'[opt]
+/// base-specifier-list ',' base-specifier '...'[opt]
+void Parser::ParseBaseClause(Decl *ClassDecl) {
+ assert(Tok.is(tok::colon) && "Not a base clause");
+ ConsumeToken();
+
+ // Build up an array of parsed base specifiers.
+ SmallVector<CXXBaseSpecifier *, 8> BaseInfo;
+
+ while (true) {
+ // Parse a base-specifier.
+ BaseResult Result = ParseBaseSpecifier(ClassDecl);
+ if (Result.isInvalid()) {
+ // Skip the rest of this base specifier, up until the comma or
+ // opening brace.
+ SkipUntil(tok::comma, tok::l_brace, true, true);
+ } else {
+ // Add this to our array of base specifiers.
+ BaseInfo.push_back(Result.get());
+ }
+
+ // If the next token is a comma, consume it and keep reading
+ // base-specifiers.
+ if (Tok.isNot(tok::comma)) break;
+
+ // Consume the comma.
+ ConsumeToken();
+ }
+
+ // Attach the base specifiers
+ Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size());
+}
+
+/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is
+/// one entry in the base class list of a class specifier, for example:
+/// class foo : public bar, virtual private baz {
+/// 'public bar' and 'virtual private baz' are each base-specifiers.
+///
+/// base-specifier: [C++ class.derived]
+/// ::[opt] nested-name-specifier[opt] class-name
+/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt]
+/// base-type-specifier
+/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt]
+/// base-type-specifier
+Parser::BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) {
+ bool IsVirtual = false;
+ SourceLocation StartLoc = Tok.getLocation();
+
+ // Parse the 'virtual' keyword.
+ if (Tok.is(tok::kw_virtual)) {
+ ConsumeToken();
+ IsVirtual = true;
+ }
+
+ // Parse an (optional) access specifier.
+ AccessSpecifier Access = getAccessSpecifierIfPresent();
+ if (Access != AS_none)
+ ConsumeToken();
+
+ // Parse the 'virtual' keyword (again!), in case it came after the
+ // access specifier.
+ if (Tok.is(tok::kw_virtual)) {
+ SourceLocation VirtualLoc = ConsumeToken();
+ if (IsVirtual) {
+ // Complain about duplicate 'virtual'
+ Diag(VirtualLoc, diag::err_dup_virtual)
+ << FixItHint::CreateRemoval(VirtualLoc);
+ }
+
+ IsVirtual = true;
+ }
+
+ // Parse 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;
+ if (Tok.is(tok::ellipsis))
+ EllipsisLoc = ConsumeToken();
+
+ // Find the complete source range for the base-specifier.
+ SourceRange Range(StartLoc, EndLocation);
+
+ // Notify semantic analysis that we have parsed a complete
+ // base-specifier.
+ return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access,
+ BaseType.get(), BaseLoc, 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 = 0;
+ DeclaratorChunk::FunctionTypeInfo &FTI
+ = DeclaratorInfo.getFunctionTypeInfo();
+
+ for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) {
+ if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) {
+ if (!LateMethod) {
+ // Push this method onto the stack of late-parsed method
+ // declarations.
+ LateMethod = new LateParsedMethodDeclaration(this, ThisDecl);
+ getCurrentClass().LateParsedDeclarations.push_back(LateMethod);
+ LateMethod->TemplateScope = getCurScope()->isTemplateParamScope();
+
+ // Add all of the parameters prior to this one (they don't
+ // have default arguments).
+ LateMethod->DefaultArgs.reserve(FTI.NumArgs);
+ for (unsigned I = 0; I < ParamIdx; ++I)
+ LateMethod->DefaultArgs.push_back(
+ LateParsedDefaultArgument(FTI.ArgInfo[I].Param));
+ }
+
+ // Add this parameter to the list of parameters (it may or may
+ // not have a default argument).
+ LateMethod->DefaultArgs.push_back(
+ LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param,
+ FTI.ArgInfo[ParamIdx].DefaultArgTokens));
+ }
+ }
+}
+
+/// isCXX0XVirtSpecifier - Determine whether the given token is a C++0x
+/// virt-specifier.
+///
+/// virt-specifier:
+/// override
+/// final
+VirtSpecifiers::Specifier Parser::isCXX0XVirtSpecifier(const Token &Tok) const {
+ if (!getLangOpts().CPlusPlus)
+ return VirtSpecifiers::VS_None;
+
+ if (Tok.is(tok::identifier)) {
+ IdentifierInfo *II = Tok.getIdentifierInfo();
+
+ // Initialize the contextual keywords.
+ if (!Ident_final) {
+ Ident_final = &PP.getIdentifierTable().get("final");
+ Ident_override = &PP.getIdentifierTable().get("override");
+ }
+
+ if (II == Ident_override)
+ return VirtSpecifiers::VS_Override;
+
+ if (II == Ident_final)
+ return VirtSpecifiers::VS_Final;
+ }
+
+ return VirtSpecifiers::VS_None;
+}
+
+/// ParseOptionalCXX0XVirtSpecifierSeq - Parse a virt-specifier-seq.
+///
+/// virt-specifier-seq:
+/// virt-specifier
+/// virt-specifier-seq virt-specifier
+void Parser::ParseOptionalCXX0XVirtSpecifierSeq(VirtSpecifiers &VS) {
+ while (true) {
+ VirtSpecifiers::Specifier Specifier = isCXX0XVirtSpecifier();
+ 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 = 0;
+ if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec))
+ Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier)
+ << PrevSpec
+ << FixItHint::CreateRemoval(Tok.getLocation());
+
+ Diag(Tok.getLocation(), getLangOpts().CPlusPlus0x ?
+ diag::warn_cxx98_compat_override_control_keyword :
+ diag::ext_override_control_keyword)
+ << VirtSpecifiers::getSpecifierName(Specifier);
+ ConsumeToken();
+ }
+}
+
+/// isCXX0XFinalKeyword - Determine whether the next token is a C++0x
+/// contextual 'final' keyword.
+bool Parser::isCXX0XFinalKeyword() const {
+ if (!getLangOpts().CPlusPlus)
+ return false;
+
+ if (!Tok.is(tok::identifier))
+ return false;
+
+ // Initialize the contextual keywords.
+ if (!Ident_final) {
+ Ident_final = &PP.getIdentifierTable().get("final");
+ Ident_override = &PP.getIdentifierTable().get("override");
+ }
+
+ return Tok.getIdentifierInfo() == Ident_final;
+}
+
+/// 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
+///
+/// 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);
+ return;
+ }
+
+ // Access declarations.
+ if (!TemplateInfo.Kind &&
+ (Tok.is(tok::identifier) || Tok.is(tok::coloncolon)) &&
+ !TryAnnotateCXXScopeToken() &&
+ Tok.is(tok::annot_cxxscope)) {
+ bool isAccessDecl = false;
+ if (NextToken().is(tok::identifier))
+ isAccessDecl = GetLookAheadToken(2).is(tok::semi);
+ else
+ isAccessDecl = NextToken().is(tok::kw_operator);
+
+ if (isAccessDecl) {
+ // Collect the scope specifier token we annotated earlier.
+ CXXScopeSpec SS;
+ ParseOptionalCXXScopeSpecifier(SS, ParsedType(),
+ /*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_semi_after,
+ "access declaration",
+ tok::semi))
+ return;
+
+ Actions.ActOnUsingDeclaration(getCurScope(), AS,
+ false, SourceLocation(),
+ SS, Name,
+ /* AttrList */ 0,
+ /* IsTypeName */ false,
+ SourceLocation());
+ return;
+ }
+ }
+
+ // static_assert-declaration
+ if (Tok.is(tok::kw_static_assert) || 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);
+ }
+
+ // Don't parse FOO:BAR as if it were a typo for FOO::BAR, in this context it
+ // is a bitfield.
+ ColonProtectionRAIIObject X(*this);
+
+ ParsedAttributesWithRange attrs(AttrFactory);
+ // Optional C++0x attribute-specifier
+ MaybeParseCXX0XAttributes(attrs);
+ 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, true, true);
+ } 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);
+ ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class,
+ &CommonLateParsedAttrs);
+
+ MultiTemplateParamsArg TemplateParams(Actions,
+ TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0,
+ TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0);
+
+ if (Tok.is(tok::semi)) {
+ ConsumeToken();
+ Decl *TheDecl =
+ Actions.ParsedFreeStandingDeclSpec(getCurScope(), AS, DS, 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;
+ if (Tok.isNot(tok::colon)) {
+ // Don't parse FOO:BAR as if it were a typo for FOO::BAR.
+ ColonProtectionRAIIObject X(*this);
+
+ // Parse the first declarator.
+ ParseDeclarator(DeclaratorInfo);
+ // Error parsing the declarator?
+ if (!DeclaratorInfo.hasName()) {
+ // If so, skip until the semi-colon or a }.
+ SkipUntil(tok::r_brace, true, true);
+ if (Tok.is(tok::semi))
+ ConsumeToken();
+ return;
+ }
+
+ ParseOptionalCXX0XVirtSpecifierSeq(VS);
+
+ // If attributes exist after the declarator, but before an '{', parse them.
+ MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
+
+ // MSVC permits pure specifier on inline functions declared 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, true, true);
+ 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().CPlusPlus0x) {
+ 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;
+ }
+ }
+
+ if (DefinitionKind) {
+ if (!DeclaratorInfo.isFunctionDeclarator()) {
+ Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params);
+ ConsumeBrace();
+ SkipUntil(tok::r_brace, /*StopAtSemi*/false);
+
+ // Consume the optional ';'
+ if (Tok.is(tok::semi))
+ ConsumeToken();
+ return;
+ }
+
+ if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
+ Diag(DeclaratorInfo.getIdentifierLoc(),
+ diag::err_function_declared_typedef);
+ // This recovery skips the entire function body. It would be nice
+ // to simply call ParseCXXInlineMethodDef() below, however Sema
+ // assumes the declarator represents a function, not a typedef.
+ ConsumeBrace();
+ SkipUntil(tok::r_brace, /*StopAtSemi*/false);
+
+ // Consume the optional ';'
+ if (Tok.is(tok::semi))
+ ConsumeToken();
+ return;
+ }
+
+ Decl *FunDecl =
+ ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo,
+ VS, DefinitionKind, Init);
+
+ 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)) {
+ ConsumeToken();
+ }
+
+ return;
+ }
+ }
+
+ // member-declarator-list:
+ // member-declarator
+ // member-declarator-list ',' member-declarator
+
+ SmallVector<Decl *, 8> DeclsInGroup;
+ ExprResult BitfieldSize;
+ bool ExpectSemi = true;
+
+ while (1) {
+ // member-declarator:
+ // declarator pure-specifier[opt]
+ // declarator brace-or-equal-initializer[opt]
+ // identifier[opt] ':' constant-expression
+ if (Tok.is(tok::colon)) {
+ ConsumeToken();
+ BitfieldSize = ParseConstantExpression();
+ if (BitfieldSize.isInvalid())
+ SkipUntil(tok::comma, true, true);
+ }
+
+ // If a simple-asm-expr is present, parse it.
+ if (Tok.is(tok::kw_asm)) {
+ SourceLocation Loc;
+ ExprResult AsmLabel(ParseSimpleAsm(&Loc));
+ if (AsmLabel.isInvalid())
+ SkipUntil(tok::comma, true, true);
+
+ DeclaratorInfo.setAsmLabel(AsmLabel.release());
+ DeclaratorInfo.SetRangeEnd(Loc);
+ }
+
+ // If attributes exist after the declarator, parse them.
+ MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
+
+ // FIXME: When g++ adds support for this, we'll need to check whether it
+ // goes before or after the GNU attributes and __asm__.
+ ParseOptionalCXX0XVirtSpecifierSeq(VS);
+
+ bool HasDeferredInitializer = false;
+ if ((Tok.is(tok::equal) || Tok.is(tok::l_brace)) && !HasInitializer) {
+ if (BitfieldSize.get()) {
+ Diag(Tok, diag::err_bitfield_member_init);
+ SkipUntil(tok::comma, true, true);
+ } else {
+ HasInitializer = true;
+ HasDeferredInitializer = !DeclaratorInfo.isDeclarationOfFunction() &&
+ DeclaratorInfo.getDeclSpec().getStorageClassSpec()
+ != DeclSpec::SCS_static &&
+ DeclaratorInfo.getDeclSpec().getStorageClassSpec()
+ != DeclSpec::SCS_typedef;
+ }
+ }
+
+ // NOTE: If Sema is the Action module and declarator is an instance field,
+ // this call will *not* return the created decl; It will return null.
+ // See Sema::ActOnCXXMemberDeclarator for details.
+
+ Decl *ThisDecl = 0;
+ if (DS.isFriendSpecified()) {
+ // TODO: handle initializers, bitfields, 'delete'
+ ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo,
+ move(TemplateParams));
+ } else {
+ ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS,
+ DeclaratorInfo,
+ move(TemplateParams),
+ BitfieldSize.release(),
+ VS, HasDeferredInitializer);
+ if (AccessAttrs)
+ Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs,
+ false, true);
+ }
+
+ // 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);
+ }
+ LateParsedAttrs.clear();
+
+ // Handle the initializer.
+ if (HasDeferredInitializer) {
+ // The initializer was deferred; parse it and cache the tokens.
+ Diag(Tok, getLangOpts().CPlusPlus0x ?
+ diag::warn_cxx98_compat_nonstatic_member_init :
+ diag::ext_nonstatic_member_init);
+
+ if (DeclaratorInfo.isArrayOfUnknownBound()) {
+ // C++0x [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, true, true);
+ if (ThisDecl)
+ // Avoid later warnings about a class member of incomplete type.
+ 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, true, true);
+ else if (ThisDecl)
+ Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid(),
+ DS.getTypeSpecType() == DeclSpec::TST_auto);
+ } else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static) {
+ // No initializer.
+ Actions.ActOnUninitializedDecl(ThisDecl,
+ DS.getTypeSpecType() == DeclSpec::TST_auto);
+ }
+
+ if (ThisDecl) {
+ Actions.FinalizeDeclaration(ThisDecl);
+ DeclsInGroup.push_back(ThisDecl);
+ }
+
+ if (ThisDecl && DeclaratorInfo.isFunctionDeclarator() &&
+ DeclaratorInfo.getDeclSpec().getStorageClassSpec()
+ != DeclSpec::SCS_typedef) {
+ HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl);
+ }
+
+ DeclaratorInfo.complete(ThisDecl);
+
+ // If we don't have a comma, it is either the end of the list (a ';')
+ // or an error, bail out.
+ if (Tok.isNot(tok::comma))
+ break;
+
+ // Consume the comma.
+ SourceLocation CommaLoc = ConsumeToken();
+
+ 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);
+
+ // Attributes are only allowed on the second declarator.
+ MaybeParseGNUAttributes(DeclaratorInfo);
+
+ if (Tok.isNot(tok::colon))
+ ParseDeclarator(DeclaratorInfo);
+ }
+
+ if (ExpectSemi &&
+ ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) {
+ // Skip to end of block or statement.
+ SkipUntil(tok::r_brace, true, true);
+ // If we stopped at a ';', eat it.
+ if (Tok.is(tok::semi)) ConsumeToken();
+ return;
+ }
+
+ Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup.data(),
+ DeclsInGroup.size());
+}
+
+/// 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 (Tok.is(tok::equal)) {
+ EqualLoc = ConsumeToken();
+ 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 ExprResult();
+ }
+ } 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 ExprResult();
+ }
+
+ }
+ return ParseInitializer();
+}
+
+/// ParseCXXMemberSpecification - Parse the class definition.
+///
+/// member-specification:
+/// member-declaration member-specification[opt]
+/// access-specifier ':' member-specification[opt]
+///
+void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
+ unsigned TagType, Decl *TagDecl) {
+ assert((TagType == DeclSpec::TST_struct ||
+ TagType == DeclSpec::TST_union ||
+ TagType == DeclSpec::TST_class) && "Invalid TagType!");
+
+ PrettyDeclStackTraceEntry CrashInfo(Actions, TagDecl, RecordLoc,
+ "parsing struct/union/class body");
+
+ // Determine whether this is a non-nested class. Note that local
+ // classes are *not* considered to be nested classes.
+ bool NonNestedClass = true;
+ if (!ClassStack.empty()) {
+ for (const Scope *S = getCurScope(); S; S = S->getParent()) {
+ if (S->isClassScope()) {
+ // We're inside a class scope, so this is a nested class.
+ NonNestedClass = false;
+ break;
+ }
+
+ if ((S->getFlags() & Scope::FnScope)) {
+ // If we're in a function or function template declared in the
+ // body of a class, then this is a local class rather than a
+ // nested class.
+ const Scope *Parent = S->getParent();
+ if (Parent->isTemplateParamScope())
+ Parent = Parent->getParent();
+ if (Parent->isClassScope())
+ break;
+ }
+ }
+ }
+
+ // Enter a scope for the class.
+ ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
+
+ // Note that we are parsing a new (potentially-nested) class definition.
+ ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass);
+
+ if (TagDecl)
+ Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
+
+ SourceLocation FinalLoc;
+
+ // Parse the optional 'final' keyword.
+ if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) {
+ assert(isCXX0XFinalKeyword() && "not a class definition");
+ FinalLoc = ConsumeToken();
+
+ Diag(FinalLoc, getLangOpts().CPlusPlus0x ?
+ diag::warn_cxx98_compat_override_control_keyword :
+ diag::ext_override_control_keyword) << "final";
+ }
+
+ 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,
+ 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) && Tok.isNot(tok::eof)) {
+ // 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)) {
+ Diag(Tok, diag::ext_extra_struct_semi)
+ << DeclSpec::getSpecifierName((DeclSpec::TST)TagType)
+ << FixItHint::CreateRemoval(Tok.getLocation());
+ ConsumeToken();
+ continue;
+ }
+
+ if (Tok.is(tok::annot_pragma_vis)) {
+ HandlePragmaVisibility();
+ continue;
+ }
+
+ if (Tok.is(tok::annot_pragma_pack)) {
+ HandlePragmaPack();
+ continue;
+ }
+
+ 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 (Tok.is(tok::colon)) {
+ EndLoc = Tok.getLocation();
+ ConsumeToken();
+ } else if (Tok.is(tok::semi)) {
+ EndLoc = Tok.getLocation();
+ ConsumeToken();
+ Diag(EndLoc, diag::err_expected_colon)
+ << FixItHint::CreateReplacement(EndLoc, ":");
+ } else {
+ EndLoc = ASLoc.getLocWithOffset(TokLength);
+ Diag(EndLoc, diag::err_expected_colon)
+ << FixItHint::CreateInsertion(EndLoc, ":");
+ }
+
+ if (Actions.ActOnAccessSpecifier(AS, ASLoc, EndLoc,
+ AccessAttrs.getList())) {
+ // found another attribute than only annotations
+ AccessAttrs.clear();
+ }
+
+ continue;
+ }
+
+ // FIXME: Make sure we don't have a template here.
+
+ // Parse all the comma separated declarators.
+ ParseCXXClassMemberDeclaration(CurAS, AccessAttrs.getList());
+ }
+
+ T.consumeClose();
+ } else {
+ SkipUntil(tok::r_brace, false, false);
+ }
+
+ // 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();
+}
+
+/// 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.data(),
+ MemInitializers.size());
+ 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_lbrace_or_comma);
+ SkipUntil(tok::l_brace, true, true);
+ break;
+ }
+ } while (true);
+
+ Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc,
+ MemInitializers.data(), MemInitializers.size(),
+ AnyErrors);
+}
+
+/// ParseMemInitializer - Parse a C++ member initializer, which is
+/// part of a constructor initializer that explicitly initializes one
+/// member or base class (C++ [class.base.init]). See
+/// ParseConstructorInitializer for an example.
+///
+/// [C++] mem-initializer:
+/// mem-initializer-id '(' expression-list[opt] ')'
+/// [C++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 = 0;
+ DeclSpec DS(AttrFactory);
+ SourceLocation IdLoc = Tok.getLocation();
+ if (Tok.is(tok::annot_decltype)) {
+ // Get the decltype expression, if there is one.
+ ParseDecltypeSpecifier(DS);
+ } else {
+ if (Tok.is(tok::identifier))
+ // Get the identifier. This may be a member name or a class name,
+ // but we'll let the semantic analysis determine which it is.
+ II = Tok.getIdentifierInfo();
+ ConsumeToken();
+ }
+
+
+ // Parse the '('.
+ if (getLangOpts().CPlusPlus0x && Tok.is(tok::l_brace)) {
+ Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
+
+ ExprResult InitList = ParseBraceInitializer();
+ if (InitList.isInvalid())
+ return true;
+
+ SourceLocation EllipsisLoc;
+ if (Tok.is(tok::ellipsis))
+ EllipsisLoc = ConsumeToken();
+
+ return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
+ TemplateTypeTy, DS, IdLoc,
+ InitList.take(), EllipsisLoc);
+ } else if(Tok.is(tok::l_paren)) {
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ T.consumeOpen();
+
+ // Parse the optional expression-list.
+ ExprVector ArgExprs(Actions);
+ CommaLocsTy CommaLocs;
+ if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) {
+ SkipUntil(tok::r_paren);
+ return true;
+ }
+
+ T.consumeClose();
+
+ SourceLocation EllipsisLoc;
+ if (Tok.is(tok::ellipsis))
+ EllipsisLoc = ConsumeToken();
+
+ return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
+ TemplateTypeTy, DS, IdLoc,
+ T.getOpenLocation(), ArgExprs.take(),
+ ArgExprs.size(), T.getCloseLocation(),
+ EllipsisLoc);
+ }
+
+ Diag(Tok, getLangOpts().CPlusPlus0x ? diag::err_expected_lparen_or_lbrace
+ : diag::err_expected_lparen);
+ return true;
+}
+
+/// \brief Parse a C++ exception-specification if present (C++0x [except.spec]).
+///
+/// exception-specification:
+/// dynamic-exception-specification
+/// noexcept-specification
+///
+/// noexcept-specification:
+/// 'noexcept'
+/// 'noexcept' '(' constant-expression ')'
+ExceptionSpecificationType
+Parser::tryParseExceptionSpecification(
+ SourceRange &SpecificationRange,
+ SmallVectorImpl<ParsedType> &DynamicExceptions,
+ SmallVectorImpl<SourceRange> &DynamicExceptionRanges,
+ ExprResult &NoexceptExpr) {
+ ExceptionSpecificationType Result = EST_None;
+
+ // See if there's a dynamic specification.
+ if (Tok.is(tok::kw_throw)) {
+ Result = ParseDynamicExceptionSpecification(SpecificationRange,
+ DynamicExceptions,
+ DynamicExceptionRanges);
+ assert(DynamicExceptions.size() == DynamicExceptionRanges.size() &&
+ "Produced different number of exception types and ranges.");
+ }
+
+ // If there's no noexcept specification, we're done.
+ if (Tok.isNot(tok::kw_noexcept))
+ return Result;
+
+ Diag(Tok, diag::warn_cxx98_compat_noexcept_decl);
+
+ // If we already had a dynamic specification, parse the noexcept for,
+ // recovery, but emit a diagnostic and don't store the results.
+ SourceRange NoexceptRange;
+ ExceptionSpecificationType NoexceptType = EST_None;
+
+ SourceLocation KeywordLoc = ConsumeToken();
+ if (Tok.is(tok::l_paren)) {
+ // There is an argument.
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ T.consumeOpen();
+ NoexceptType = EST_ComputedNoexcept;
+ NoexceptExpr = ParseConstantExpression();
+ // The argument must be contextually convertible to bool. We use
+ // ActOnBooleanCondition for this purpose.
+ if (!NoexceptExpr.isInvalid())
+ NoexceptExpr = Actions.ActOnBooleanCondition(getCurScope(), KeywordLoc,
+ NoexceptExpr.get());
+ T.consumeClose();
+ NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation());
+ } else {
+ // There is no argument.
+ NoexceptType = EST_BasicNoexcept;
+ NoexceptRange = SourceRange(KeywordLoc, KeywordLoc);
+ }
+
+ if (Result == EST_None) {
+ SpecificationRange = NoexceptRange;
+ Result = NoexceptType;
+
+ // If there's a dynamic specification after a noexcept specification,
+ // parse that and ignore the results.
+ if (Tok.is(tok::kw_throw)) {
+ Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
+ ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions,
+ DynamicExceptionRanges);
+ }
+ } else {
+ Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
+ }
+
+ return Result;
+}
+
+/// ParseDynamicExceptionSpecification - Parse a C++
+/// dynamic-exception-specification (C++ [except.spec]).
+///
+/// dynamic-exception-specification:
+/// 'throw' '(' type-id-list [opt] ')'
+/// [MS] 'throw' '(' '...' ')'
+///
+/// type-id-list:
+/// type-id ... [opt]
+/// type-id-list ',' type-id ... [opt]
+///
+ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification(
+ SourceRange &SpecificationRange,
+ SmallVectorImpl<ParsedType> &Exceptions,
+ SmallVectorImpl<SourceRange> &Ranges) {
+ assert(Tok.is(tok::kw_throw) && "expected throw");
+
+ SpecificationRange.setBegin(ConsumeToken());
+ BalancedDelimiterTracker T(*this, tok::l_paren);
+ if (T.consumeOpen()) {
+ Diag(Tok, diag::err_expected_lparen_after) << "throw";
+ SpecificationRange.setEnd(SpecificationRange.getBegin());
+ return EST_DynamicNone;
+ }
+
+ // Parse throw(...), a Microsoft extension that means "this function
+ // can throw anything".
+ if (Tok.is(tok::ellipsis)) {
+ SourceLocation EllipsisLoc = ConsumeToken();
+ if (!getLangOpts().MicrosoftExt)
+ Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec);
+ T.consumeClose();
+ SpecificationRange.setEnd(T.getCloseLocation());
+ return EST_MSAny;
+ }
+
+ // Parse the sequence of type-ids.
+ SourceRange Range;
+ while (Tok.isNot(tok::r_paren)) {
+ TypeResult Res(ParseTypeName(&Range));
+
+ if (Tok.is(tok::ellipsis)) {
+ // C++0x [temp.variadic]p5:
+ // - In a dynamic-exception-specification (15.4); the pattern is a
+ // type-id.
+ SourceLocation Ellipsis = ConsumeToken();
+ Range.setEnd(Ellipsis);
+ if (!Res.isInvalid())
+ Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis);
+ }
+
+ if (!Res.isInvalid()) {
+ Exceptions.push_back(Res.get());
+ Ranges.push_back(Range);
+ }
+
+ if (Tok.is(tok::comma))
+ ConsumeToken();
+ else
+ break;
+ }
+
+ T.consumeClose();
+ SpecificationRange.setEnd(T.getCloseLocation());
+ return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic;
+}
+
+/// ParseTrailingReturnType - Parse a trailing return type on a new-style
+/// function declaration.
+TypeResult Parser::ParseTrailingReturnType(SourceRange &Range) {
+ assert(Tok.is(tok::arrow) && "expected arrow");
+
+ ConsumeToken();
+
+ return ParseTypeName(&Range, Declarator::TrailingReturnContext);
+}
+
+/// \brief We have just started parsing the definition of a new class,
+/// so push that class onto our stack of classes that is currently
+/// being parsed.
+Sema::ParsingClassState
+Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass) {
+ assert((NonNestedClass || !ClassStack.empty()) &&
+ "Nested class without outer class");
+ ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass));
+ return Actions.PushParsingClass();
+}
+
+/// \brief Deallocate the given parsed class and all of its nested
+/// classes.
+void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) {
+ for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I)
+ delete Class->LateParsedDeclarations[I];
+ delete Class;
+}
+
+/// \brief Pop the top class of the stack of classes that are
+/// currently being parsed.
+///
+/// This routine should be called when we have finished parsing the
+/// definition of a class, but have not yet popped the Scope
+/// associated with the class's definition.
+///
+/// \returns true if the class we've popped is a top-level class,
+/// false otherwise.
+void Parser::PopParsingClass(Sema::ParsingClassState state) {
+ assert(!ClassStack.empty() && "Mismatched push/pop for class parsing");
+
+ Actions.PopParsingClass(state);
+
+ ParsingClass *Victim = ClassStack.top();
+ ClassStack.pop();
+ if (Victim->TopLevelClass) {
+ // Deallocate all of the nested classes of this class,
+ // recursively: we don't need to keep any of this information.
+ DeallocateParsedClasses(Victim);
+ return;
+ }
+ assert(!ClassStack.empty() && "Missing top-level class?");
+
+ if (Victim->LateParsedDeclarations.empty()) {
+ // The victim is a nested class, but we will not need to perform
+ // any processing after the definition of this class since it has
+ // no members whose handling was delayed. Therefore, we can just
+ // remove this nested class.
+ DeallocateParsedClasses(Victim);
+ return;
+ }
+
+ // This nested class has some members that will need to be processed
+ // after the top-level class is completely defined. Therefore, add
+ // it to the list of nested classes within its parent.
+ assert(getCurScope()->isClassScope() && "Nested class outside of class scope?");
+ ClassStack.top()->LateParsedDeclarations.push_back(new LateParsedClass(this, Victim));
+ Victim->TemplateScope = getCurScope()->getParent()->isTemplateParamScope();
+}
+
+/// \brief Try to parse an 'identifier' which appears within an attribute-token.
+///
+/// \return the parsed identifier on success, and 0 if the next token is not an
+/// attribute-token.
+///
+/// C++11 [dcl.attr.grammar]p3:
+/// If a keyword or an alternative token that satisfies the syntactic
+/// requirements of an identifier is contained in an attribute-token,
+/// it is considered an identifier.
+IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) {
+ switch (Tok.getKind()) {
+ default:
+ // Identifiers and keywords have identifier info attached.
+ if (IdentifierInfo *II = Tok.getIdentifierInfo()) {
+ Loc = ConsumeToken();
+ return II;
+ }
+ return 0;
+
+ case tok::ampamp: // 'and'
+ case tok::pipe: // 'bitor'
+ case tok::pipepipe: // 'or'
+ case tok::caret: // 'xor'
+ case tok::tilde: // 'compl'
+ case tok::amp: // 'bitand'
+ case tok::ampequal: // 'and_eq'
+ case tok::pipeequal: // 'or_eq'
+ case tok::caretequal: // 'xor_eq'
+ case tok::exclaim: // 'not'
+ case tok::exclaimequal: // 'not_eq'
+ // Alternative tokens do not have identifier info, but their spelling
+ // starts with an alphabetical character.
+ llvm::SmallString<8> SpellingBuf;
+ StringRef Spelling = PP.getSpelling(Tok.getLocation(), SpellingBuf);
+ if (std::isalpha(Spelling[0])) {
+ Loc = ConsumeToken();
+ return &PP.getIdentifierTable().get(Spelling.data());
+ }
+ return 0;
+ }
+}
+
+/// ParseCXX11AttributeSpecifier - Parse a C++11 attribute-specifier. Currently
+/// only parses standard attributes.
+///
+/// [C++11] attribute-specifier:
+/// '[' '[' attribute-list ']' ']'
+/// alignment-specifier
+///
+/// [C++11] attribute-list:
+/// attribute[opt]
+/// attribute-list ',' attribute[opt]
+/// attribute '...'
+/// attribute-list ',' attribute '...'
+///
+/// [C++11] attribute:
+/// attribute-token attribute-argument-clause[opt]
+///
+/// [C++11] attribute-token:
+/// identifier
+/// attribute-scoped-token
+///
+/// [C++11] attribute-scoped-token:
+/// attribute-namespace '::' identifier
+///
+/// [C++11] attribute-namespace:
+/// identifier
+///
+/// [C++11] attribute-argument-clause:
+/// '(' balanced-token-seq ')'
+///
+/// [C++11] balanced-token-seq:
+/// balanced-token
+/// balanced-token-seq balanced-token
+///
+/// [C++11] balanced-token:
+/// '(' balanced-token-seq ')'
+/// '[' balanced-token-seq ']'
+/// '{' balanced-token-seq '}'
+/// any token but '(', ')', '[', ']', '{', or '}'
+void Parser::ParseCXX11AttributeSpecifier(ParsedAttributes &attrs,
+ SourceLocation *endLoc) {
+ if (Tok.is(tok::kw_alignas)) {
+ Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas);
+ ParseAlignmentSpecifier(attrs, endLoc);
+ return;
+ }
+
+ assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square)
+ && "Not a C++11 attribute list");
+
+ Diag(Tok.getLocation(), diag::warn_cxx98_compat_attribute);
+
+ ConsumeBracket();
+ ConsumeBracket();
+
+ while (Tok.isNot(tok::r_square)) {
+ // attribute not present
+ if (Tok.is(tok::comma)) {
+ ConsumeToken();
+ continue;
+ }
+
+ SourceLocation ScopeLoc, AttrLoc;
+ IdentifierInfo *ScopeName = 0, *AttrName = 0;
+
+ AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
+ if (!AttrName)
+ // Break out to the "expected ']'" diagnostic.
+ break;
+
+ // scoped attribute
+ if (Tok.is(tok::coloncolon)) {
+ ConsumeToken();
+
+ ScopeName = AttrName;
+ ScopeLoc = AttrLoc;
+
+ AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
+ if (!AttrName) {
+ Diag(Tok.getLocation(), diag::err_expected_ident);
+ SkipUntil(tok::r_square, tok::comma, true, true);
+ continue;
+ }
+ }
+
+ bool AttrParsed = false;
+ // No scoped names are supported; ideally we could put all non-standard
+ // attributes into namespaces.
+ if (!ScopeName) {
+ switch (AttributeList::getKind(AttrName)) {
+ // No arguments
+ case AttributeList::AT_carries_dependency:
+ case AttributeList::AT_noreturn: {
+ if (Tok.is(tok::l_paren)) {
+ Diag(Tok.getLocation(), diag::err_cxx11_attribute_forbids_arguments)
+ << AttrName->getName();
+ break;
+ }
+
+ attrs.addNew(AttrName, AttrLoc, 0, AttrLoc, 0,
+ SourceLocation(), 0, 0, false, true);
+ AttrParsed = true;
+ break;
+ }
+
+ // Silence warnings
+ default: break;
+ }
+ }
+
+ // Skip the entire parameter clause, if any
+ if (!AttrParsed && Tok.is(tok::l_paren)) {
+ ConsumeParen();
+ // SkipUntil maintains the balancedness of tokens.
+ SkipUntil(tok::r_paren, false);
+ }
+
+ if (Tok.is(tok::ellipsis)) {
+ if (AttrParsed)
+ Diag(Tok, diag::err_cxx11_attribute_forbids_ellipsis)
+ << AttrName->getName();
+ ConsumeToken();
+ }
+ }
+
+ if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare))
+ SkipUntil(tok::r_square, false);
+ if (endLoc)
+ *endLoc = Tok.getLocation();
+ if (ExpectAndConsume(tok::r_square, diag::err_expected_rsquare))
+ SkipUntil(tok::r_square, false);
+}
+
+/// ParseCXX11Attributes - Parse a C++0x attribute-specifier-seq.
+///
+/// attribute-specifier-seq:
+/// attribute-specifier-seq[opt] attribute-specifier
+void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
+ SourceLocation *endLoc) {
+ SourceLocation StartLoc = Tok.getLocation(), Loc;
+ if (!endLoc)
+ endLoc = &Loc;
+
+ do {
+ ParseCXX11AttributeSpecifier(attrs, endLoc);
+ } while (isCXX11AttributeSpecifier());
+
+ attrs.Range = SourceRange(StartLoc, *endLoc);
+}
+
+/// ParseMicrosoftAttributes - Parse a Microsoft attribute [Attr]
+///
+/// [MS] ms-attribute:
+/// '[' token-seq ']'
+///
+/// [MS] ms-attribute-seq:
+/// ms-attribute[opt]
+/// ms-attribute ms-attribute-seq
+void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs,
+ SourceLocation *endLoc) {
+ assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list");
+
+ while (Tok.is(tok::l_square)) {
+ // FIXME: If this is actually a C++11 attribute, parse it as one.
+ ConsumeBracket();
+ SkipUntil(tok::r_square, true, true);
+ if (endLoc) *endLoc = Tok.getLocation();
+ ExpectAndConsume(tok::r_square, diag::err_expected_rsquare);
+ }
+}
+
+void Parser::ParseMicrosoftIfExistsClassDeclaration(DeclSpec::TST TagType,
+ AccessSpecifier& CurAS) {
+ IfExistsCondition Result;
+ if (ParseMicrosoftIfExistsCondition(Result))
+ return;
+
+ BalancedDelimiterTracker Braces(*this, tok::l_brace);
+ if (Braces.consumeOpen()) {
+ Diag(Tok, diag::err_expected_lbrace);
+ return;
+ }
+
+ switch (Result.Behavior) {
+ case IEB_Parse:
+ // Parse the declarations below.
+ break;
+
+ case IEB_Dependent:
+ Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists)
+ << Result.IsIfExists;
+ // Fall through to skip.
+
+ case IEB_Skip:
+ Braces.skipToEnd();
+ return;
+ }
+
+ while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
+ // __if_exists, __if_not_exists can nest.
+ if ((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)) {
+ Diag(Tok, diag::ext_extra_struct_semi)
+ << DeclSpec::getSpecifierName((DeclSpec::TST)TagType)
+ << FixItHint::CreateRemoval(Tok.getLocation());
+ ConsumeToken();
+ continue;
+ }
+
+ AccessSpecifier AS = getAccessSpecifierIfPresent();
+ if (AS != AS_none) {
+ // Current token is a C++ access specifier.
+ CurAS = AS;
+ SourceLocation ASLoc = Tok.getLocation();
+ ConsumeToken();
+ if (Tok.is(tok::colon))
+ Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation());
+ else
+ Diag(Tok, diag::err_expected_colon);
+ ConsumeToken();
+ continue;
+ }
+
+ // Parse all the comma separated declarators.
+ ParseCXXClassMemberDeclaration(CurAS, 0);
+ }
+
+ Braces.consumeClose();
+}
generated by cgit v1.2.3 (git 2.46.0) at 2024-09-20 04:00:38 +0000