forked from OSchip/llvm-project
1544 lines
54 KiB
C++
1544 lines
54 KiB
C++
//===--- ParseDeclCXX.cpp - C++ Declaration Parsing -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the C++ Declaration portions of the Parser interfaces.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Basic/OperatorKinds.h"
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#include "clang/Parse/Parser.h"
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#include "clang/Parse/ParseDiagnostic.h"
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#include "clang/Parse/DeclSpec.h"
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#include "clang/Parse/Scope.h"
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#include "ExtensionRAIIObject.h"
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using namespace clang;
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/// ParseNamespace - We know that the current token is a namespace keyword. This
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/// may either be a top level namespace or a block-level namespace alias.
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///
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/// namespace-definition: [C++ 7.3: basic.namespace]
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/// named-namespace-definition
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/// unnamed-namespace-definition
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///
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/// unnamed-namespace-definition:
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/// 'namespace' attributes[opt] '{' namespace-body '}'
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///
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/// named-namespace-definition:
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/// original-namespace-definition
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/// extension-namespace-definition
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///
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/// original-namespace-definition:
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/// 'namespace' identifier attributes[opt] '{' namespace-body '}'
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///
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/// extension-namespace-definition:
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/// 'namespace' original-namespace-name '{' namespace-body '}'
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///
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/// namespace-alias-definition: [C++ 7.3.2: namespace.alias]
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/// 'namespace' identifier '=' qualified-namespace-specifier ';'
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///
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Parser::DeclPtrTy Parser::ParseNamespace(unsigned Context,
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SourceLocation &DeclEnd) {
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assert(Tok.is(tok::kw_namespace) && "Not a namespace!");
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SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'.
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteNamespaceDecl(CurScope);
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ConsumeToken();
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}
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SourceLocation IdentLoc;
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IdentifierInfo *Ident = 0;
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Token attrTok;
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if (Tok.is(tok::identifier)) {
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Ident = Tok.getIdentifierInfo();
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IdentLoc = ConsumeToken(); // eat the identifier.
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}
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// Read label attributes, if present.
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Action::AttrTy *AttrList = 0;
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if (Tok.is(tok::kw___attribute)) {
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attrTok = Tok;
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// FIXME: save these somewhere.
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AttrList = ParseAttributes();
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}
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if (Tok.is(tok::equal)) {
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if (AttrList)
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Diag(attrTok, diag::err_unexpected_namespace_attributes_alias);
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return ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd);
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}
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if (Tok.isNot(tok::l_brace)) {
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Diag(Tok, Ident ? diag::err_expected_lbrace :
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diag::err_expected_ident_lbrace);
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return DeclPtrTy();
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}
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SourceLocation LBrace = ConsumeBrace();
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// Enter a scope for the namespace.
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ParseScope NamespaceScope(this, Scope::DeclScope);
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DeclPtrTy NamespcDecl =
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Actions.ActOnStartNamespaceDef(CurScope, IdentLoc, Ident, LBrace);
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PrettyStackTraceActionsDecl CrashInfo(NamespcDecl, NamespaceLoc, Actions,
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PP.getSourceManager(),
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"parsing namespace");
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while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof))
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ParseExternalDeclaration();
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// Leave the namespace scope.
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NamespaceScope.Exit();
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SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBrace);
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Actions.ActOnFinishNamespaceDef(NamespcDecl, RBraceLoc);
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DeclEnd = RBraceLoc;
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return NamespcDecl;
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}
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/// ParseNamespaceAlias - Parse the part after the '=' in a namespace
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/// alias definition.
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///
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Parser::DeclPtrTy Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc,
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SourceLocation AliasLoc,
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IdentifierInfo *Alias,
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SourceLocation &DeclEnd) {
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assert(Tok.is(tok::equal) && "Not equal token");
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ConsumeToken(); // eat the '='.
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteNamespaceAliasDecl(CurScope);
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ConsumeToken();
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}
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CXXScopeSpec SS;
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// Parse (optional) nested-name-specifier.
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ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false);
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if (SS.isInvalid() || Tok.isNot(tok::identifier)) {
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Diag(Tok, diag::err_expected_namespace_name);
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// Skip to end of the definition and eat the ';'.
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SkipUntil(tok::semi);
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return DeclPtrTy();
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}
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// Parse identifier.
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IdentifierInfo *Ident = Tok.getIdentifierInfo();
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SourceLocation IdentLoc = ConsumeToken();
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// Eat the ';'.
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DeclEnd = Tok.getLocation();
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ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name,
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"", tok::semi);
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return Actions.ActOnNamespaceAliasDef(CurScope, NamespaceLoc, AliasLoc, Alias,
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SS, IdentLoc, Ident);
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}
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/// ParseLinkage - We know that the current token is a string_literal
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/// and just before that, that extern was seen.
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///
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/// linkage-specification: [C++ 7.5p2: dcl.link]
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/// 'extern' string-literal '{' declaration-seq[opt] '}'
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/// 'extern' string-literal declaration
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///
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Parser::DeclPtrTy Parser::ParseLinkage(unsigned Context) {
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assert(Tok.is(tok::string_literal) && "Not a string literal!");
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llvm::SmallVector<char, 8> LangBuffer;
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// LangBuffer is guaranteed to be big enough.
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LangBuffer.resize(Tok.getLength());
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const char *LangBufPtr = &LangBuffer[0];
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unsigned StrSize = PP.getSpelling(Tok, LangBufPtr);
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SourceLocation Loc = ConsumeStringToken();
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ParseScope LinkageScope(this, Scope::DeclScope);
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DeclPtrTy LinkageSpec
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= Actions.ActOnStartLinkageSpecification(CurScope,
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/*FIXME: */SourceLocation(),
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Loc, LangBufPtr, StrSize,
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Tok.is(tok::l_brace)? Tok.getLocation()
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: SourceLocation());
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if (Tok.isNot(tok::l_brace)) {
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ParseDeclarationOrFunctionDefinition();
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return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec,
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SourceLocation());
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}
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SourceLocation LBrace = ConsumeBrace();
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while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
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ParseExternalDeclaration();
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}
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SourceLocation RBrace = MatchRHSPunctuation(tok::r_brace, LBrace);
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return Actions.ActOnFinishLinkageSpecification(CurScope, LinkageSpec, RBrace);
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}
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/// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or
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/// using-directive. Assumes that current token is 'using'.
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Parser::DeclPtrTy Parser::ParseUsingDirectiveOrDeclaration(unsigned Context,
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SourceLocation &DeclEnd) {
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assert(Tok.is(tok::kw_using) && "Not using token");
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// Eat 'using'.
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SourceLocation UsingLoc = ConsumeToken();
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteUsing(CurScope);
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ConsumeToken();
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}
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if (Tok.is(tok::kw_namespace))
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// Next token after 'using' is 'namespace' so it must be using-directive
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return ParseUsingDirective(Context, UsingLoc, DeclEnd);
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// Otherwise, it must be using-declaration.
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return ParseUsingDeclaration(Context, UsingLoc, DeclEnd);
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}
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/// ParseUsingDirective - Parse C++ using-directive, assumes
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/// that current token is 'namespace' and 'using' was already parsed.
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///
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/// using-directive: [C++ 7.3.p4: namespace.udir]
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/// 'using' 'namespace' ::[opt] nested-name-specifier[opt]
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/// namespace-name ;
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/// [GNU] using-directive:
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/// 'using' 'namespace' ::[opt] nested-name-specifier[opt]
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/// namespace-name attributes[opt] ;
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///
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Parser::DeclPtrTy Parser::ParseUsingDirective(unsigned Context,
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SourceLocation UsingLoc,
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SourceLocation &DeclEnd) {
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assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token");
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// Eat 'namespace'.
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SourceLocation NamespcLoc = ConsumeToken();
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteUsingDirective(CurScope);
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ConsumeToken();
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}
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CXXScopeSpec SS;
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// Parse (optional) nested-name-specifier.
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ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false);
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AttributeList *AttrList = 0;
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IdentifierInfo *NamespcName = 0;
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SourceLocation IdentLoc = SourceLocation();
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// Parse namespace-name.
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if (SS.isInvalid() || Tok.isNot(tok::identifier)) {
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Diag(Tok, diag::err_expected_namespace_name);
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// If there was invalid namespace name, skip to end of decl, and eat ';'.
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SkipUntil(tok::semi);
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// FIXME: Are there cases, when we would like to call ActOnUsingDirective?
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return DeclPtrTy();
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}
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// Parse identifier.
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NamespcName = Tok.getIdentifierInfo();
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IdentLoc = ConsumeToken();
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// Parse (optional) attributes (most likely GNU strong-using extension).
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if (Tok.is(tok::kw___attribute))
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AttrList = ParseAttributes();
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// Eat ';'.
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DeclEnd = Tok.getLocation();
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ExpectAndConsume(tok::semi,
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AttrList ? diag::err_expected_semi_after_attribute_list :
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diag::err_expected_semi_after_namespace_name, "", tok::semi);
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return Actions.ActOnUsingDirective(CurScope, UsingLoc, NamespcLoc, SS,
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IdentLoc, NamespcName, AttrList);
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}
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/// ParseUsingDeclaration - Parse C++ using-declaration. Assumes that
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/// 'using' was already seen.
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///
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/// using-declaration: [C++ 7.3.p3: namespace.udecl]
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/// 'using' 'typename'[opt] ::[opt] nested-name-specifier
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/// unqualified-id
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/// 'using' :: unqualified-id
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///
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Parser::DeclPtrTy Parser::ParseUsingDeclaration(unsigned Context,
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SourceLocation UsingLoc,
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SourceLocation &DeclEnd,
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AccessSpecifier AS) {
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CXXScopeSpec SS;
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bool IsTypeName;
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// Ignore optional 'typename'.
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if (Tok.is(tok::kw_typename)) {
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ConsumeToken();
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IsTypeName = true;
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}
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else
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IsTypeName = false;
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// Parse nested-name-specifier.
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ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false);
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AttributeList *AttrList = 0;
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// Check nested-name specifier.
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if (SS.isInvalid()) {
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SkipUntil(tok::semi);
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return DeclPtrTy();
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}
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if (Tok.is(tok::annot_template_id)) {
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// C++0x N2914 [namespace.udecl]p5:
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// A using-declaration shall not name a template-id.
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Diag(Tok, diag::err_using_decl_can_not_refer_to_template_spec);
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SkipUntil(tok::semi);
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return DeclPtrTy();
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}
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IdentifierInfo *TargetName = 0;
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OverloadedOperatorKind Op = OO_None;
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SourceLocation IdentLoc;
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if (Tok.is(tok::kw_operator)) {
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IdentLoc = Tok.getLocation();
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Op = TryParseOperatorFunctionId();
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if (!Op) {
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// If there was an invalid operator, skip to end of decl, and eat ';'.
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SkipUntil(tok::semi);
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return DeclPtrTy();
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}
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} else if (Tok.is(tok::identifier)) {
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// Parse identifier.
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TargetName = Tok.getIdentifierInfo();
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IdentLoc = ConsumeToken();
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} else {
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// FIXME: Use a better diagnostic here.
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Diag(Tok, diag::err_expected_ident_in_using);
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// If there was invalid identifier, skip to end of decl, and eat ';'.
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SkipUntil(tok::semi);
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return DeclPtrTy();
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}
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// Parse (optional) attributes (most likely GNU strong-using extension).
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if (Tok.is(tok::kw___attribute))
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AttrList = ParseAttributes();
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// Eat ';'.
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DeclEnd = Tok.getLocation();
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ExpectAndConsume(tok::semi, diag::err_expected_semi_after,
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AttrList ? "attributes list" : "namespace name", tok::semi);
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return Actions.ActOnUsingDeclaration(CurScope, AS, UsingLoc, SS,
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IdentLoc, TargetName, Op,
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AttrList, IsTypeName);
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}
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/// ParseStaticAssertDeclaration - Parse C++0x static_assert-declaratoion.
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///
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/// static_assert-declaration:
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/// static_assert ( constant-expression , string-literal ) ;
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///
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Parser::DeclPtrTy Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){
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assert(Tok.is(tok::kw_static_assert) && "Not a static_assert declaration");
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SourceLocation StaticAssertLoc = ConsumeToken();
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if (Tok.isNot(tok::l_paren)) {
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Diag(Tok, diag::err_expected_lparen);
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return DeclPtrTy();
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}
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SourceLocation LParenLoc = ConsumeParen();
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OwningExprResult AssertExpr(ParseConstantExpression());
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if (AssertExpr.isInvalid()) {
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SkipUntil(tok::semi);
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return DeclPtrTy();
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}
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if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "", tok::semi))
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return DeclPtrTy();
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if (Tok.isNot(tok::string_literal)) {
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Diag(Tok, diag::err_expected_string_literal);
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SkipUntil(tok::semi);
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return DeclPtrTy();
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}
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OwningExprResult AssertMessage(ParseStringLiteralExpression());
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if (AssertMessage.isInvalid())
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return DeclPtrTy();
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MatchRHSPunctuation(tok::r_paren, LParenLoc);
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DeclEnd = Tok.getLocation();
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ExpectAndConsume(tok::semi, diag::err_expected_semi_after_static_assert);
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return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc, move(AssertExpr),
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move(AssertMessage));
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}
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/// ParseDecltypeSpecifier - Parse a C++0x decltype specifier.
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///
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/// 'decltype' ( expression )
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///
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void Parser::ParseDecltypeSpecifier(DeclSpec &DS) {
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assert(Tok.is(tok::kw_decltype) && "Not a decltype specifier");
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SourceLocation StartLoc = ConsumeToken();
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SourceLocation LParenLoc = Tok.getLocation();
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if (ExpectAndConsume(tok::l_paren, diag::err_expected_lparen_after,
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"decltype")) {
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SkipUntil(tok::r_paren);
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return;
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}
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// Parse the expression
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// C++0x [dcl.type.simple]p4:
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// The operand of the decltype specifier is an unevaluated operand.
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EnterExpressionEvaluationContext Unevaluated(Actions,
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Action::Unevaluated);
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OwningExprResult Result = ParseExpression();
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if (Result.isInvalid()) {
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SkipUntil(tok::r_paren);
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return;
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}
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// Match the ')'
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SourceLocation RParenLoc;
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if (Tok.is(tok::r_paren))
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RParenLoc = ConsumeParen();
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else
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MatchRHSPunctuation(tok::r_paren, LParenLoc);
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if (RParenLoc.isInvalid())
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return;
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const char *PrevSpec = 0;
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unsigned DiagID;
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// Check for duplicate type specifiers (e.g. "int decltype(a)").
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if (DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec,
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DiagID, Result.release()))
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Diag(StartLoc, DiagID) << PrevSpec;
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}
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/// ParseClassName - Parse a C++ class-name, which names a class. Note
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/// that we only check that the result names a type; semantic analysis
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/// will need to verify that the type names a class. The result is
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/// either a type or NULL, depending on whether a type name was
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/// found.
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///
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/// class-name: [C++ 9.1]
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/// identifier
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/// simple-template-id
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///
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Parser::TypeResult Parser::ParseClassName(SourceLocation &EndLocation,
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const CXXScopeSpec *SS,
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bool DestrExpected) {
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// Check whether we have a template-id that names a type.
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if (Tok.is(tok::annot_template_id)) {
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TemplateIdAnnotation *TemplateId
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= static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue());
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if (TemplateId->Kind == TNK_Type_template) {
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AnnotateTemplateIdTokenAsType(SS);
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assert(Tok.is(tok::annot_typename) && "template-id -> type failed");
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TypeTy *Type = Tok.getAnnotationValue();
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EndLocation = Tok.getAnnotationEndLoc();
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ConsumeToken();
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if (Type)
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return Type;
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return true;
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}
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// Fall through to produce an error below.
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}
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if (Tok.isNot(tok::identifier)) {
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Diag(Tok, diag::err_expected_class_name);
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return true;
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}
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// We have an identifier; check whether it is actually a type.
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TypeTy *Type = Actions.getTypeName(*Tok.getIdentifierInfo(),
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Tok.getLocation(), CurScope, SS,
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true);
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if (!Type) {
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Diag(Tok, DestrExpected ? diag::err_destructor_class_name
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: diag::err_expected_class_name);
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return true;
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}
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// Consume the identifier.
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EndLocation = ConsumeToken();
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return Type;
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}
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/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or
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/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which
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/// until we reach the start of a definition or see a token that
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/// cannot start a definition.
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///
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/// class-specifier: [C++ class]
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/// class-head '{' member-specification[opt] '}'
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/// class-head '{' member-specification[opt] '}' attributes[opt]
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/// class-head:
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/// class-key identifier[opt] base-clause[opt]
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/// class-key nested-name-specifier identifier base-clause[opt]
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/// class-key nested-name-specifier[opt] simple-template-id
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/// base-clause[opt]
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/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt]
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/// [GNU] class-key attributes[opt] nested-name-specifier
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/// identifier base-clause[opt]
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/// [GNU] class-key attributes[opt] nested-name-specifier[opt]
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/// simple-template-id base-clause[opt]
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/// class-key:
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/// 'class'
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/// 'struct'
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/// 'union'
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///
|
|
/// 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) {
|
|
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(CurScope, TagType);
|
|
ConsumeToken();
|
|
}
|
|
|
|
AttributeList *Attr = 0;
|
|
// If attributes exist after tag, parse them.
|
|
if (Tok.is(tok::kw___attribute))
|
|
Attr = ParseAttributes();
|
|
|
|
// If declspecs exist after tag, parse them.
|
|
if (Tok.is(tok::kw___declspec))
|
|
Attr = ParseMicrosoftDeclSpec(Attr);
|
|
|
|
if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_pod)) {
|
|
// GNU libstdc++ 4.2 uses __is_pod as the name of a struct template, but
|
|
// __is_pod is a keyword in GCC >= 4.3. Therefore, when we see the
|
|
// token sequence "struct __is_pod", make __is_pod into a normal
|
|
// identifier rather than a keyword, to allow libstdc++ 4.2 to work
|
|
// properly.
|
|
Tok.getIdentifierInfo()->setTokenID(tok::identifier);
|
|
Tok.setKind(tok::identifier);
|
|
}
|
|
|
|
if (TagType == DeclSpec::TST_struct && Tok.is(tok::kw___is_empty)) {
|
|
// GNU libstdc++ 4.2 uses __is_empty as the name of a struct template, but
|
|
// __is_empty is a keyword in GCC >= 4.3. Therefore, when we see the
|
|
// token sequence "struct __is_empty", make __is_empty into a normal
|
|
// identifier rather than a keyword, to allow libstdc++ 4.2 to work
|
|
// properly.
|
|
Tok.getIdentifierInfo()->setTokenID(tok::identifier);
|
|
Tok.setKind(tok::identifier);
|
|
}
|
|
|
|
// Parse the (optional) nested-name-specifier.
|
|
CXXScopeSpec SS;
|
|
if (getLang().CPlusPlus &&
|
|
ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true))
|
|
if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id))
|
|
Diag(Tok, diag::err_expected_ident);
|
|
|
|
// Parse the (optional) class name or simple-template-id.
|
|
IdentifierInfo *Name = 0;
|
|
SourceLocation NameLoc;
|
|
TemplateIdAnnotation *TemplateId = 0;
|
|
if (Tok.is(tok::identifier)) {
|
|
Name = Tok.getIdentifierInfo();
|
|
NameLoc = ConsumeToken();
|
|
} else if (Tok.is(tok::annot_template_id)) {
|
|
TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue());
|
|
NameLoc = ConsumeToken();
|
|
|
|
if (TemplateId->Kind != TNK_Type_template) {
|
|
// The template-name in the simple-template-id refers to
|
|
// something other than a class template. Give an appropriate
|
|
// error message and skip to the ';'.
|
|
SourceRange Range(NameLoc);
|
|
if (SS.isNotEmpty())
|
|
Range.setBegin(SS.getBeginLoc());
|
|
|
|
Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template)
|
|
<< Name << static_cast<int>(TemplateId->Kind) << Range;
|
|
|
|
DS.SetTypeSpecError();
|
|
SkipUntil(tok::semi, false, true);
|
|
TemplateId->Destroy();
|
|
return;
|
|
}
|
|
}
|
|
|
|
// There are four options here. If we have 'struct foo;', then this
|
|
// is either a forward declaration or a friend declaration, which
|
|
// have to be treated differently. If we have 'struct foo {...' or
|
|
// 'struct foo :...' then this is a definition. Otherwise we have
|
|
// something like 'struct foo xyz', a reference.
|
|
Action::TagUseKind TUK;
|
|
if (Tok.is(tok::l_brace) || (getLang().CPlusPlus && Tok.is(tok::colon))) {
|
|
if (DS.isFriendSpecified()) {
|
|
// C++ [class.friend]p2:
|
|
// A class shall not be defined in a friend declaration.
|
|
Diag(Tok.getLocation(), diag::err_friend_decl_defines_class)
|
|
<< SourceRange(DS.getFriendSpecLoc());
|
|
|
|
// Skip everything up to the semicolon, so that this looks like a proper
|
|
// friend class (or template thereof) declaration.
|
|
SkipUntil(tok::semi, true, true);
|
|
TUK = Action::TUK_Friend;
|
|
} else {
|
|
// Okay, this is a class definition.
|
|
TUK = Action::TUK_Definition;
|
|
}
|
|
} else if (Tok.is(tok::semi))
|
|
TUK = DS.isFriendSpecified() ? Action::TUK_Friend : Action::TUK_Declaration;
|
|
else
|
|
TUK = Action::TUK_Reference;
|
|
|
|
if (!Name && !TemplateId && TUK != Action::TUK_Definition) {
|
|
// We have a declaration or reference to an anonymous class.
|
|
Diag(StartLoc, diag::err_anon_type_definition)
|
|
<< DeclSpec::getSpecifierName(TagType);
|
|
|
|
// Skip the rest of this declarator, up until the comma or semicolon.
|
|
SkipUntil(tok::comma, true);
|
|
|
|
if (TemplateId)
|
|
TemplateId->Destroy();
|
|
return;
|
|
}
|
|
|
|
// Create the tag portion of the class or class template.
|
|
Action::DeclResult TagOrTempResult = true; // invalid
|
|
Action::TypeResult TypeResult = true; // invalid
|
|
TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
|
|
|
|
// FIXME: When TUK == TUK_Reference and we have a template-id, we need
|
|
// to turn that template-id into a type.
|
|
|
|
bool Owned = false;
|
|
if (TemplateId) {
|
|
// Explicit specialization, class template partial specialization,
|
|
// or explicit instantiation.
|
|
ASTTemplateArgsPtr TemplateArgsPtr(Actions,
|
|
TemplateId->getTemplateArgs(),
|
|
TemplateId->getTemplateArgIsType(),
|
|
TemplateId->NumArgs);
|
|
if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
|
|
TUK == Action::TUK_Declaration) {
|
|
// This is an explicit instantiation of a class template.
|
|
TagOrTempResult
|
|
= Actions.ActOnExplicitInstantiation(CurScope,
|
|
TemplateInfo.ExternLoc,
|
|
TemplateInfo.TemplateLoc,
|
|
TagType,
|
|
StartLoc,
|
|
SS,
|
|
TemplateTy::make(TemplateId->Template),
|
|
TemplateId->TemplateNameLoc,
|
|
TemplateId->LAngleLoc,
|
|
TemplateArgsPtr,
|
|
TemplateId->getTemplateArgLocations(),
|
|
TemplateId->RAngleLoc,
|
|
Attr);
|
|
} else if (TUK == Action::TUK_Reference) {
|
|
TypeResult
|
|
= Actions.ActOnTemplateIdType(TemplateTy::make(TemplateId->Template),
|
|
TemplateId->TemplateNameLoc,
|
|
TemplateId->LAngleLoc,
|
|
TemplateArgsPtr,
|
|
TemplateId->getTemplateArgLocations(),
|
|
TemplateId->RAngleLoc);
|
|
|
|
TypeResult = Actions.ActOnTagTemplateIdType(TypeResult, TUK,
|
|
TagType, StartLoc);
|
|
} else {
|
|
// This is an explicit specialization or a class template
|
|
// partial specialization.
|
|
TemplateParameterLists FakedParamLists;
|
|
|
|
if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
|
|
// This looks like an explicit instantiation, because we have
|
|
// something like
|
|
//
|
|
// template class Foo<X>
|
|
//
|
|
// but it actually has a definition. Most likely, this was
|
|
// meant to be an explicit specialization, but the user forgot
|
|
// the '<>' after 'template'.
|
|
assert(TUK == Action::TUK_Definition && "Expected a definition here");
|
|
|
|
SourceLocation LAngleLoc
|
|
= PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
|
|
Diag(TemplateId->TemplateNameLoc,
|
|
diag::err_explicit_instantiation_with_definition)
|
|
<< SourceRange(TemplateInfo.TemplateLoc)
|
|
<< CodeModificationHint::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(CurScope, TagType, TUK,
|
|
StartLoc, SS,
|
|
TemplateTy::make(TemplateId->Template),
|
|
TemplateId->TemplateNameLoc,
|
|
TemplateId->LAngleLoc,
|
|
TemplateArgsPtr,
|
|
TemplateId->getTemplateArgLocations(),
|
|
TemplateId->RAngleLoc,
|
|
Attr,
|
|
Action::MultiTemplateParamsArg(Actions,
|
|
TemplateParams? &(*TemplateParams)[0] : 0,
|
|
TemplateParams? TemplateParams->size() : 0));
|
|
}
|
|
TemplateId->Destroy();
|
|
} else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
|
|
TUK == Action::TUK_Declaration) {
|
|
// Explicit instantiation of a member of a class template
|
|
// specialization, e.g.,
|
|
//
|
|
// template struct Outer<int>::Inner;
|
|
//
|
|
TagOrTempResult
|
|
= Actions.ActOnExplicitInstantiation(CurScope,
|
|
TemplateInfo.ExternLoc,
|
|
TemplateInfo.TemplateLoc,
|
|
TagType, StartLoc, SS, Name,
|
|
NameLoc, Attr);
|
|
} else {
|
|
if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
|
|
TUK == Action::TUK_Definition) {
|
|
// FIXME: Diagnose this particular error.
|
|
}
|
|
|
|
bool IsDependent = false;
|
|
|
|
// Declaration or definition of a class type
|
|
TagOrTempResult = Actions.ActOnTag(CurScope, TagType, TUK, StartLoc, SS,
|
|
Name, NameLoc, Attr, AS,
|
|
Action::MultiTemplateParamsArg(Actions,
|
|
TemplateParams? &(*TemplateParams)[0] : 0,
|
|
TemplateParams? TemplateParams->size() : 0),
|
|
Owned, IsDependent);
|
|
|
|
// If ActOnTag said the type was dependent, try again with the
|
|
// less common call.
|
|
if (IsDependent)
|
|
TypeResult = Actions.ActOnDependentTag(CurScope, TagType, TUK,
|
|
SS, Name, StartLoc, NameLoc);
|
|
}
|
|
|
|
// Parse the optional base clause (C++ only).
|
|
if (getLang().CPlusPlus && Tok.is(tok::colon))
|
|
ParseBaseClause(TagOrTempResult.get());
|
|
|
|
// If there is a body, parse it and inform the actions module.
|
|
if (Tok.is(tok::l_brace))
|
|
if (getLang().CPlusPlus)
|
|
ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get());
|
|
else
|
|
ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get());
|
|
else if (TUK == Action::TUK_Definition) {
|
|
// FIXME: Complain that we have a base-specifier list but no
|
|
// definition.
|
|
Diag(Tok, diag::err_expected_lbrace);
|
|
}
|
|
|
|
void *Result;
|
|
if (!TypeResult.isInvalid()) {
|
|
TagType = DeclSpec::TST_typename;
|
|
Result = TypeResult.get();
|
|
Owned = false;
|
|
} else if (!TagOrTempResult.isInvalid()) {
|
|
Result = TagOrTempResult.get().getAs<void>();
|
|
} else {
|
|
DS.SetTypeSpecError();
|
|
return;
|
|
}
|
|
|
|
const char *PrevSpec = 0;
|
|
unsigned DiagID;
|
|
|
|
if (DS.SetTypeSpecType(TagType, StartLoc, PrevSpec, DiagID,
|
|
Result, Owned))
|
|
Diag(StartLoc, DiagID) << PrevSpec;
|
|
}
|
|
|
|
/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived].
|
|
///
|
|
/// base-clause : [C++ class.derived]
|
|
/// ':' base-specifier-list
|
|
/// base-specifier-list:
|
|
/// base-specifier '...'[opt]
|
|
/// base-specifier-list ',' base-specifier '...'[opt]
|
|
void Parser::ParseBaseClause(DeclPtrTy ClassDecl) {
|
|
assert(Tok.is(tok::colon) && "Not a base clause");
|
|
ConsumeToken();
|
|
|
|
// Build up an array of parsed base specifiers.
|
|
llvm::SmallVector<BaseTy *, 8> BaseInfo;
|
|
|
|
while (true) {
|
|
// Parse a base-specifier.
|
|
BaseResult Result = ParseBaseSpecifier(ClassDecl);
|
|
if (Result.isInvalid()) {
|
|
// Skip the rest of this base specifier, up until the comma or
|
|
// opening brace.
|
|
SkipUntil(tok::comma, tok::l_brace, true, true);
|
|
} else {
|
|
// Add this to our array of base specifiers.
|
|
BaseInfo.push_back(Result.get());
|
|
}
|
|
|
|
// If the next token is a comma, consume it and keep reading
|
|
// base-specifiers.
|
|
if (Tok.isNot(tok::comma)) break;
|
|
|
|
// Consume the comma.
|
|
ConsumeToken();
|
|
}
|
|
|
|
// Attach the base specifiers
|
|
Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo.data(), BaseInfo.size());
|
|
}
|
|
|
|
/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is
|
|
/// one entry in the base class list of a class specifier, for example:
|
|
/// class foo : public bar, virtual private baz {
|
|
/// 'public bar' and 'virtual private baz' are each base-specifiers.
|
|
///
|
|
/// base-specifier: [C++ class.derived]
|
|
/// ::[opt] nested-name-specifier[opt] class-name
|
|
/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt]
|
|
/// class-name
|
|
/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt]
|
|
/// class-name
|
|
Parser::BaseResult Parser::ParseBaseSpecifier(DeclPtrTy ClassDecl) {
|
|
bool IsVirtual = false;
|
|
SourceLocation StartLoc = Tok.getLocation();
|
|
|
|
// Parse the 'virtual' keyword.
|
|
if (Tok.is(tok::kw_virtual)) {
|
|
ConsumeToken();
|
|
IsVirtual = true;
|
|
}
|
|
|
|
// Parse an (optional) access specifier.
|
|
AccessSpecifier Access = getAccessSpecifierIfPresent();
|
|
if (Access)
|
|
ConsumeToken();
|
|
|
|
// Parse the 'virtual' keyword (again!), in case it came after the
|
|
// access specifier.
|
|
if (Tok.is(tok::kw_virtual)) {
|
|
SourceLocation VirtualLoc = ConsumeToken();
|
|
if (IsVirtual) {
|
|
// Complain about duplicate 'virtual'
|
|
Diag(VirtualLoc, diag::err_dup_virtual)
|
|
<< CodeModificationHint::CreateRemoval(SourceRange(VirtualLoc));
|
|
}
|
|
|
|
IsVirtual = true;
|
|
}
|
|
|
|
// Parse optional '::' and optional nested-name-specifier.
|
|
CXXScopeSpec SS;
|
|
ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, true);
|
|
|
|
// The location of the base class itself.
|
|
SourceLocation BaseLoc = Tok.getLocation();
|
|
|
|
// Parse the class-name.
|
|
SourceLocation EndLocation;
|
|
TypeResult BaseType = ParseClassName(EndLocation, &SS);
|
|
if (BaseType.isInvalid())
|
|
return true;
|
|
|
|
// Find the complete source range for the base-specifier.
|
|
SourceRange Range(StartLoc, EndLocation);
|
|
|
|
// Notify semantic analysis that we have parsed a complete
|
|
// base-specifier.
|
|
return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access,
|
|
BaseType.get(), BaseLoc);
|
|
}
|
|
|
|
/// getAccessSpecifierIfPresent - Determine whether the next token is
|
|
/// a C++ access-specifier.
|
|
///
|
|
/// access-specifier: [C++ class.derived]
|
|
/// 'private'
|
|
/// 'protected'
|
|
/// 'public'
|
|
AccessSpecifier Parser::getAccessSpecifierIfPresent() const {
|
|
switch (Tok.getKind()) {
|
|
default: return AS_none;
|
|
case tok::kw_private: return AS_private;
|
|
case tok::kw_protected: return AS_protected;
|
|
case tok::kw_public: return AS_public;
|
|
}
|
|
}
|
|
|
|
void Parser::HandleMemberFunctionDefaultArgs(Declarator& DeclaratorInfo,
|
|
DeclPtrTy ThisDecl) {
|
|
// We just declared a member function. If this member function
|
|
// has any default arguments, we'll need to parse them later.
|
|
LateParsedMethodDeclaration *LateMethod = 0;
|
|
DeclaratorChunk::FunctionTypeInfo &FTI
|
|
= DeclaratorInfo.getTypeObject(0).Fun;
|
|
for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) {
|
|
if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) {
|
|
if (!LateMethod) {
|
|
// Push this method onto the stack of late-parsed method
|
|
// declarations.
|
|
getCurrentClass().MethodDecls.push_back(
|
|
LateParsedMethodDeclaration(ThisDecl));
|
|
LateMethod = &getCurrentClass().MethodDecls.back();
|
|
LateMethod->TemplateScope = CurScope->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[ParamIdx].Param));
|
|
}
|
|
|
|
// Add this parameter to the list of parameters (it or may
|
|
// not have a default argument).
|
|
LateMethod->DefaultArgs.push_back(
|
|
LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param,
|
|
FTI.ArgInfo[ParamIdx].DefaultArgTokens));
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration.
|
|
///
|
|
/// member-declaration:
|
|
/// decl-specifier-seq[opt] member-declarator-list[opt] ';'
|
|
/// function-definition ';'[opt]
|
|
/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO]
|
|
/// using-declaration [TODO]
|
|
/// [C++0x] static_assert-declaration
|
|
/// template-declaration
|
|
/// [GNU] '__extension__' member-declaration
|
|
///
|
|
/// member-declarator-list:
|
|
/// member-declarator
|
|
/// member-declarator-list ',' member-declarator
|
|
///
|
|
/// member-declarator:
|
|
/// declarator pure-specifier[opt]
|
|
/// declarator constant-initializer[opt]
|
|
/// identifier[opt] ':' constant-expression
|
|
///
|
|
/// pure-specifier:
|
|
/// '= 0'
|
|
///
|
|
/// constant-initializer:
|
|
/// '=' constant-expression
|
|
///
|
|
void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
|
|
const ParsedTemplateInfo &TemplateInfo) {
|
|
// static_assert-declaration
|
|
if (Tok.is(tok::kw_static_assert)) {
|
|
// FIXME: Check for templates
|
|
SourceLocation DeclEnd;
|
|
ParseStaticAssertDeclaration(DeclEnd);
|
|
return;
|
|
}
|
|
|
|
if (Tok.is(tok::kw_template)) {
|
|
assert(!TemplateInfo.TemplateParams &&
|
|
"Nested template improperly parsed?");
|
|
SourceLocation DeclEnd;
|
|
ParseDeclarationStartingWithTemplate(Declarator::MemberContext, DeclEnd,
|
|
AS);
|
|
return;
|
|
}
|
|
|
|
// Handle: member-declaration ::= '__extension__' member-declaration
|
|
if (Tok.is(tok::kw___extension__)) {
|
|
// __extension__ silences extension warnings in the subexpression.
|
|
ExtensionRAIIObject O(Diags); // Use RAII to do this.
|
|
ConsumeToken();
|
|
return ParseCXXClassMemberDeclaration(AS, TemplateInfo);
|
|
}
|
|
|
|
if (Tok.is(tok::kw_using)) {
|
|
// FIXME: Check for template aliases
|
|
|
|
// Eat 'using'.
|
|
SourceLocation UsingLoc = ConsumeToken();
|
|
|
|
if (Tok.is(tok::kw_namespace)) {
|
|
Diag(UsingLoc, diag::err_using_namespace_in_class);
|
|
SkipUntil(tok::semi, true, true);
|
|
}
|
|
else {
|
|
SourceLocation DeclEnd;
|
|
// Otherwise, it must be using-declaration.
|
|
ParseUsingDeclaration(Declarator::MemberContext, UsingLoc, DeclEnd, AS);
|
|
}
|
|
return;
|
|
}
|
|
|
|
SourceLocation DSStart = Tok.getLocation();
|
|
// decl-specifier-seq:
|
|
// Parse the common declaration-specifiers piece.
|
|
DeclSpec DS;
|
|
ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DSC_class);
|
|
|
|
Action::MultiTemplateParamsArg TemplateParams(Actions,
|
|
TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0,
|
|
TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0);
|
|
|
|
if (Tok.is(tok::semi)) {
|
|
ConsumeToken();
|
|
Actions.ParsedFreeStandingDeclSpec(CurScope, DS);
|
|
return;
|
|
}
|
|
|
|
Declarator DeclaratorInfo(DS, Declarator::MemberContext);
|
|
|
|
if (Tok.isNot(tok::colon)) {
|
|
// Parse the first declarator.
|
|
ParseDeclarator(DeclaratorInfo);
|
|
// Error parsing the declarator?
|
|
if (!DeclaratorInfo.hasName()) {
|
|
// If so, skip until the semi-colon or a }.
|
|
SkipUntil(tok::r_brace, true);
|
|
if (Tok.is(tok::semi))
|
|
ConsumeToken();
|
|
return;
|
|
}
|
|
|
|
// function-definition:
|
|
if (Tok.is(tok::l_brace)
|
|
|| (DeclaratorInfo.isFunctionDeclarator() &&
|
|
(Tok.is(tok::colon) || Tok.is(tok::kw_try)))) {
|
|
if (!DeclaratorInfo.isFunctionDeclarator()) {
|
|
Diag(Tok, diag::err_func_def_no_params);
|
|
ConsumeBrace();
|
|
SkipUntil(tok::r_brace, true);
|
|
return;
|
|
}
|
|
|
|
if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
|
|
Diag(Tok, diag::err_function_declared_typedef);
|
|
// This recovery skips the entire function body. It would be nice
|
|
// to simply call ParseCXXInlineMethodDef() below, however Sema
|
|
// assumes the declarator represents a function, not a typedef.
|
|
ConsumeBrace();
|
|
SkipUntil(tok::r_brace, true);
|
|
return;
|
|
}
|
|
|
|
ParseCXXInlineMethodDef(AS, DeclaratorInfo, TemplateInfo);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// member-declarator-list:
|
|
// member-declarator
|
|
// member-declarator-list ',' member-declarator
|
|
|
|
llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup;
|
|
OwningExprResult BitfieldSize(Actions);
|
|
OwningExprResult Init(Actions);
|
|
bool Deleted = false;
|
|
|
|
while (1) {
|
|
|
|
// member-declarator:
|
|
// declarator pure-specifier[opt]
|
|
// declarator constant-initializer[opt]
|
|
// identifier[opt] ':' constant-expression
|
|
|
|
if (Tok.is(tok::colon)) {
|
|
ConsumeToken();
|
|
BitfieldSize = ParseConstantExpression();
|
|
if (BitfieldSize.isInvalid())
|
|
SkipUntil(tok::comma, true, true);
|
|
}
|
|
|
|
// pure-specifier:
|
|
// '= 0'
|
|
//
|
|
// constant-initializer:
|
|
// '=' constant-expression
|
|
//
|
|
// defaulted/deleted function-definition:
|
|
// '=' 'default' [TODO]
|
|
// '=' 'delete'
|
|
|
|
if (Tok.is(tok::equal)) {
|
|
ConsumeToken();
|
|
if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) {
|
|
ConsumeToken();
|
|
Deleted = true;
|
|
} else {
|
|
Init = ParseInitializer();
|
|
if (Init.isInvalid())
|
|
SkipUntil(tok::comma, true, true);
|
|
}
|
|
}
|
|
|
|
// If attributes exist after the declarator, parse them.
|
|
if (Tok.is(tok::kw___attribute)) {
|
|
SourceLocation Loc;
|
|
AttributeList *AttrList = ParseAttributes(&Loc);
|
|
DeclaratorInfo.AddAttributes(AttrList, Loc);
|
|
}
|
|
|
|
// NOTE: If Sema is the Action module and declarator is an instance field,
|
|
// this call will *not* return the created decl; It will return null.
|
|
// See Sema::ActOnCXXMemberDeclarator for details.
|
|
|
|
DeclPtrTy ThisDecl;
|
|
if (DS.isFriendSpecified()) {
|
|
// TODO: handle initializers, bitfields, 'delete'
|
|
ThisDecl = Actions.ActOnFriendFunctionDecl(CurScope, DeclaratorInfo,
|
|
/*IsDefinition*/ false,
|
|
move(TemplateParams));
|
|
} else {
|
|
ThisDecl = Actions.ActOnCXXMemberDeclarator(CurScope, AS,
|
|
DeclaratorInfo,
|
|
move(TemplateParams),
|
|
BitfieldSize.release(),
|
|
Init.release(),
|
|
Deleted);
|
|
}
|
|
if (ThisDecl)
|
|
DeclsInGroup.push_back(ThisDecl);
|
|
|
|
if (DeclaratorInfo.isFunctionDeclarator() &&
|
|
DeclaratorInfo.getDeclSpec().getStorageClassSpec()
|
|
!= DeclSpec::SCS_typedef) {
|
|
HandleMemberFunctionDefaultArgs(DeclaratorInfo, ThisDecl);
|
|
}
|
|
|
|
// If we don't have a comma, it is either the end of the list (a ';')
|
|
// or an error, bail out.
|
|
if (Tok.isNot(tok::comma))
|
|
break;
|
|
|
|
// Consume the comma.
|
|
ConsumeToken();
|
|
|
|
// Parse the next declarator.
|
|
DeclaratorInfo.clear();
|
|
BitfieldSize = 0;
|
|
Init = 0;
|
|
Deleted = false;
|
|
|
|
// Attributes are only allowed on the second declarator.
|
|
if (Tok.is(tok::kw___attribute)) {
|
|
SourceLocation Loc;
|
|
AttributeList *AttrList = ParseAttributes(&Loc);
|
|
DeclaratorInfo.AddAttributes(AttrList, Loc);
|
|
}
|
|
|
|
if (Tok.isNot(tok::colon))
|
|
ParseDeclarator(DeclaratorInfo);
|
|
}
|
|
|
|
if (Tok.is(tok::semi)) {
|
|
ConsumeToken();
|
|
Actions.FinalizeDeclaratorGroup(CurScope, DS, DeclsInGroup.data(),
|
|
DeclsInGroup.size());
|
|
return;
|
|
}
|
|
|
|
Diag(Tok, diag::err_expected_semi_decl_list);
|
|
// Skip to end of block or statement
|
|
SkipUntil(tok::r_brace, true, true);
|
|
if (Tok.is(tok::semi))
|
|
ConsumeToken();
|
|
return;
|
|
}
|
|
|
|
/// ParseCXXMemberSpecification - Parse the class definition.
|
|
///
|
|
/// member-specification:
|
|
/// member-declaration member-specification[opt]
|
|
/// access-specifier ':' member-specification[opt]
|
|
///
|
|
void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
|
|
unsigned TagType, DeclPtrTy TagDecl) {
|
|
assert((TagType == DeclSpec::TST_struct ||
|
|
TagType == DeclSpec::TST_union ||
|
|
TagType == DeclSpec::TST_class) && "Invalid TagType!");
|
|
|
|
PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions,
|
|
PP.getSourceManager(),
|
|
"parsing struct/union/class body");
|
|
|
|
SourceLocation LBraceLoc = ConsumeBrace();
|
|
|
|
// Determine whether this is a top-level (non-nested) class.
|
|
bool TopLevelClass = ClassStack.empty() ||
|
|
CurScope->isInCXXInlineMethodScope();
|
|
|
|
// 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, TopLevelClass);
|
|
|
|
if (TagDecl)
|
|
Actions.ActOnTagStartDefinition(CurScope, TagDecl);
|
|
else {
|
|
SkipUntil(tok::r_brace, false, false);
|
|
return;
|
|
}
|
|
|
|
// C++ 11p3: Members of a class defined with the keyword class are private
|
|
// by default. Members of a class defined with the keywords struct or union
|
|
// are public by default.
|
|
AccessSpecifier CurAS;
|
|
if (TagType == DeclSpec::TST_class)
|
|
CurAS = AS_private;
|
|
else
|
|
CurAS = AS_public;
|
|
|
|
// While we still have something to read, read the member-declarations.
|
|
while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
|
|
// Each iteration of this loop reads one member-declaration.
|
|
|
|
// Check for extraneous top-level semicolon.
|
|
if (Tok.is(tok::semi)) {
|
|
Diag(Tok, diag::ext_extra_struct_semi);
|
|
ConsumeToken();
|
|
continue;
|
|
}
|
|
|
|
AccessSpecifier AS = getAccessSpecifierIfPresent();
|
|
if (AS != AS_none) {
|
|
// Current token is a C++ access specifier.
|
|
CurAS = AS;
|
|
ConsumeToken();
|
|
ExpectAndConsume(tok::colon, diag::err_expected_colon);
|
|
continue;
|
|
}
|
|
|
|
// FIXME: Make sure we don't have a template here.
|
|
|
|
// Parse all the comma separated declarators.
|
|
ParseCXXClassMemberDeclaration(CurAS);
|
|
}
|
|
|
|
SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc);
|
|
|
|
AttributeList *AttrList = 0;
|
|
// If attributes exist after class contents, parse them.
|
|
if (Tok.is(tok::kw___attribute))
|
|
AttrList = ParseAttributes(); // FIXME: where should I put them?
|
|
|
|
Actions.ActOnFinishCXXMemberSpecification(CurScope, RecordLoc, TagDecl,
|
|
LBraceLoc, RBraceLoc);
|
|
|
|
// C++ 9.2p2: Within the class member-specification, the class is regarded as
|
|
// complete within function bodies, default arguments,
|
|
// exception-specifications, and constructor ctor-initializers (including
|
|
// such things in nested classes).
|
|
//
|
|
// FIXME: Only function bodies and constructor ctor-initializers are
|
|
// parsed correctly, fix the rest.
|
|
if (TopLevelClass) {
|
|
// We are not inside a nested class. This class and its nested classes
|
|
// are complete and we can parse the delayed portions of method
|
|
// declarations and the lexed inline method definitions.
|
|
ParseLexedMethodDeclarations(getCurrentClass());
|
|
ParseLexedMethodDefs(getCurrentClass());
|
|
}
|
|
|
|
// Leave the class scope.
|
|
ParsingDef.Pop();
|
|
ClassScope.Exit();
|
|
|
|
Actions.ActOnTagFinishDefinition(CurScope, TagDecl, RBraceLoc);
|
|
}
|
|
|
|
/// ParseConstructorInitializer - Parse a C++ constructor initializer,
|
|
/// which explicitly initializes the members or base classes of a
|
|
/// class (C++ [class.base.init]). For example, the three initializers
|
|
/// after the ':' in the Derived constructor below:
|
|
///
|
|
/// @code
|
|
/// class Base { };
|
|
/// class Derived : Base {
|
|
/// int x;
|
|
/// float f;
|
|
/// public:
|
|
/// Derived(float f) : Base(), x(17), f(f) { }
|
|
/// };
|
|
/// @endcode
|
|
///
|
|
/// [C++] ctor-initializer:
|
|
/// ':' mem-initializer-list
|
|
///
|
|
/// [C++] mem-initializer-list:
|
|
/// mem-initializer
|
|
/// mem-initializer , mem-initializer-list
|
|
void Parser::ParseConstructorInitializer(DeclPtrTy ConstructorDecl) {
|
|
assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'");
|
|
|
|
SourceLocation ColonLoc = ConsumeToken();
|
|
|
|
llvm::SmallVector<MemInitTy*, 4> MemInitializers;
|
|
|
|
do {
|
|
MemInitResult MemInit = ParseMemInitializer(ConstructorDecl);
|
|
if (!MemInit.isInvalid())
|
|
MemInitializers.push_back(MemInit.get());
|
|
|
|
if (Tok.is(tok::comma))
|
|
ConsumeToken();
|
|
else if (Tok.is(tok::l_brace))
|
|
break;
|
|
else {
|
|
// Skip over garbage, until we get to '{'. Don't eat the '{'.
|
|
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());
|
|
}
|
|
|
|
/// ParseMemInitializer - Parse a C++ member initializer, which is
|
|
/// part of a constructor initializer that explicitly initializes one
|
|
/// member or base class (C++ [class.base.init]). See
|
|
/// ParseConstructorInitializer for an example.
|
|
///
|
|
/// [C++] mem-initializer:
|
|
/// mem-initializer-id '(' expression-list[opt] ')'
|
|
///
|
|
/// [C++] mem-initializer-id:
|
|
/// '::'[opt] nested-name-specifier[opt] class-name
|
|
/// identifier
|
|
Parser::MemInitResult Parser::ParseMemInitializer(DeclPtrTy ConstructorDecl) {
|
|
// parse '::'[opt] nested-name-specifier[opt]
|
|
CXXScopeSpec SS;
|
|
ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/0, false);
|
|
TypeTy *TemplateTypeTy = 0;
|
|
if (Tok.is(tok::annot_template_id)) {
|
|
TemplateIdAnnotation *TemplateId
|
|
= static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue());
|
|
if (TemplateId->Kind == TNK_Type_template) {
|
|
AnnotateTemplateIdTokenAsType(&SS);
|
|
assert(Tok.is(tok::annot_typename) && "template-id -> type failed");
|
|
TemplateTypeTy = Tok.getAnnotationValue();
|
|
}
|
|
// FIXME. May need to check for TNK_Dependent_template as well.
|
|
}
|
|
if (!TemplateTypeTy && Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected_member_or_base_name);
|
|
return true;
|
|
}
|
|
|
|
// Get the identifier. This may be a member name or a class name,
|
|
// but we'll let the semantic analysis determine which it is.
|
|
IdentifierInfo *II = Tok.is(tok::identifier) ? Tok.getIdentifierInfo() : 0;
|
|
SourceLocation IdLoc = ConsumeToken();
|
|
|
|
// Parse the '('.
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
Diag(Tok, diag::err_expected_lparen);
|
|
return true;
|
|
}
|
|
SourceLocation LParenLoc = ConsumeParen();
|
|
|
|
// Parse the optional expression-list.
|
|
ExprVector ArgExprs(Actions);
|
|
CommaLocsTy CommaLocs;
|
|
if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) {
|
|
SkipUntil(tok::r_paren);
|
|
return true;
|
|
}
|
|
|
|
SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
return Actions.ActOnMemInitializer(ConstructorDecl, CurScope, SS, II,
|
|
TemplateTypeTy, IdLoc,
|
|
LParenLoc, ArgExprs.take(),
|
|
ArgExprs.size(), CommaLocs.data(),
|
|
RParenLoc);
|
|
}
|
|
|
|
/// ParseExceptionSpecification - Parse a C++ exception-specification
|
|
/// (C++ [except.spec]).
|
|
///
|
|
/// exception-specification:
|
|
/// 'throw' '(' type-id-list [opt] ')'
|
|
/// [MS] 'throw' '(' '...' ')'
|
|
///
|
|
/// type-id-list:
|
|
/// type-id
|
|
/// type-id-list ',' type-id
|
|
///
|
|
bool Parser::ParseExceptionSpecification(SourceLocation &EndLoc,
|
|
llvm::SmallVector<TypeTy*, 2>
|
|
&Exceptions,
|
|
llvm::SmallVector<SourceRange, 2>
|
|
&Ranges,
|
|
bool &hasAnyExceptionSpec) {
|
|
assert(Tok.is(tok::kw_throw) && "expected throw");
|
|
|
|
SourceLocation ThrowLoc = ConsumeToken();
|
|
|
|
if (!Tok.is(tok::l_paren)) {
|
|
return Diag(Tok, diag::err_expected_lparen_after) << "throw";
|
|
}
|
|
SourceLocation LParenLoc = ConsumeParen();
|
|
|
|
// Parse throw(...), a Microsoft extension that means "this function
|
|
// can throw anything".
|
|
if (Tok.is(tok::ellipsis)) {
|
|
hasAnyExceptionSpec = true;
|
|
SourceLocation EllipsisLoc = ConsumeToken();
|
|
if (!getLang().Microsoft)
|
|
Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec);
|
|
EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
return false;
|
|
}
|
|
|
|
// Parse the sequence of type-ids.
|
|
SourceRange Range;
|
|
while (Tok.isNot(tok::r_paren)) {
|
|
TypeResult Res(ParseTypeName(&Range));
|
|
if (!Res.isInvalid()) {
|
|
Exceptions.push_back(Res.get());
|
|
Ranges.push_back(Range);
|
|
}
|
|
if (Tok.is(tok::comma))
|
|
ConsumeToken();
|
|
else
|
|
break;
|
|
}
|
|
|
|
EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
return false;
|
|
}
|
|
|
|
/// \brief We have just started parsing the definition of a new class,
|
|
/// so push that class onto our stack of classes that is currently
|
|
/// being parsed.
|
|
void Parser::PushParsingClass(DeclPtrTy ClassDecl, bool TopLevelClass) {
|
|
assert((TopLevelClass || !ClassStack.empty()) &&
|
|
"Nested class without outer class");
|
|
ClassStack.push(new ParsingClass(ClassDecl, TopLevelClass));
|
|
}
|
|
|
|
/// \brief Deallocate the given parsed class and all of its nested
|
|
/// classes.
|
|
void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) {
|
|
for (unsigned I = 0, N = Class->NestedClasses.size(); I != N; ++I)
|
|
DeallocateParsedClasses(Class->NestedClasses[I]);
|
|
delete Class;
|
|
}
|
|
|
|
/// \brief Pop the top class of the stack of classes that are
|
|
/// currently being parsed.
|
|
///
|
|
/// This routine should be called when we have finished parsing the
|
|
/// definition of a class, but have not yet popped the Scope
|
|
/// associated with the class's definition.
|
|
///
|
|
/// \returns true if the class we've popped is a top-level class,
|
|
/// false otherwise.
|
|
void Parser::PopParsingClass() {
|
|
assert(!ClassStack.empty() && "Mismatched push/pop for class parsing");
|
|
|
|
ParsingClass *Victim = ClassStack.top();
|
|
ClassStack.pop();
|
|
if (Victim->TopLevelClass) {
|
|
// Deallocate all of the nested classes of this class,
|
|
// recursively: we don't need to keep any of this information.
|
|
DeallocateParsedClasses(Victim);
|
|
return;
|
|
}
|
|
assert(!ClassStack.empty() && "Missing top-level class?");
|
|
|
|
if (Victim->MethodDecls.empty() && Victim->MethodDefs.empty() &&
|
|
Victim->NestedClasses.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.
|
|
delete 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(CurScope->isClassScope() && "Nested class outside of class scope?");
|
|
ClassStack.top()->NestedClasses.push_back(Victim);
|
|
Victim->TemplateScope = CurScope->getParent()->isTemplateParamScope();
|
|
}
|