forked from OSchip/llvm-project
1145 lines
39 KiB
C++
1145 lines
39 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/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 "AstGuard.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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SourceLocation IdentLoc;
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IdentifierInfo *Ident = 0;
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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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// FIXME: save these somewhere.
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AttrList = ParseAttributes();
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if (Tok.is(tok::equal))
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// FIXME: Verify no attributes were present.
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return ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd);
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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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CXXScopeSpec SS;
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// Parse (optional) nested-name-specifier.
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ParseOptionalCXXScopeSpecifier(SS);
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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,
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"namespace name", 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::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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CXXScopeSpec SS;
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// Parse (optional) nested-name-specifier.
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ParseOptionalCXXScopeSpecifier(SS);
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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, diag::err_expected_semi_after,
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AttrList ? "attributes list" : "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 [TODO]
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/// 'using' :: unqualified-id [TODO]
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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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assert(false && "Not implemented");
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// FIXME: Implement parsing.
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return DeclPtrTy();
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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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/// 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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// 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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if (!Type) {
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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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// 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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///
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/// elaborated-type-specifier: [C++ dcl.type.elab]
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/// class-key ::[opt] nested-name-specifier[opt] identifier
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/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt]
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/// simple-template-id
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///
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/// Note that the C++ class-specifier and elaborated-type-specifier,
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/// together, subsume the C99 struct-or-union-specifier:
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///
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/// struct-or-union-specifier: [C99 6.7.2.1]
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/// struct-or-union identifier[opt] '{' struct-contents '}'
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/// struct-or-union identifier
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/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents
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/// '}' attributes[opt]
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/// [GNU] struct-or-union attributes[opt] identifier
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/// struct-or-union:
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/// 'struct'
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/// 'union'
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void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind,
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SourceLocation StartLoc, DeclSpec &DS,
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TemplateParameterLists *TemplateParams,
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AccessSpecifier AS) {
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DeclSpec::TST TagType;
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if (TagTokKind == tok::kw_struct)
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TagType = DeclSpec::TST_struct;
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else if (TagTokKind == tok::kw_class)
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TagType = DeclSpec::TST_class;
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else {
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assert(TagTokKind == tok::kw_union && "Not a class specifier");
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TagType = DeclSpec::TST_union;
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}
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AttributeList *Attr = 0;
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// If attributes exist after tag, parse them.
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if (Tok.is(tok::kw___attribute))
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Attr = ParseAttributes();
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// If declspecs exist after tag, parse them.
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if (Tok.is(tok::kw___declspec) && PP.getLangOptions().Microsoft)
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FuzzyParseMicrosoftDeclSpec();
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// Parse the (optional) nested-name-specifier.
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CXXScopeSpec SS;
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if (getLang().CPlusPlus && ParseOptionalCXXScopeSpecifier(SS))
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if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id))
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Diag(Tok, diag::err_expected_ident);
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// Parse the (optional) class name or simple-template-id.
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IdentifierInfo *Name = 0;
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SourceLocation NameLoc;
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TemplateIdAnnotation *TemplateId = 0;
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if (Tok.is(tok::identifier)) {
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Name = Tok.getIdentifierInfo();
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NameLoc = ConsumeToken();
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} else if (Tok.is(tok::annot_template_id)) {
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TemplateId = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue());
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NameLoc = ConsumeToken();
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if (TemplateId->Kind != TNK_Type_template) {
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// The template-name in the simple-template-id refers to
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// something other than a class template. Give an appropriate
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// error message and skip to the ';'.
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SourceRange Range(NameLoc);
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if (SS.isNotEmpty())
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Range.setBegin(SS.getBeginLoc());
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Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template)
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<< Name << static_cast<int>(TemplateId->Kind) << Range;
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DS.SetTypeSpecError();
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SkipUntil(tok::semi, false, true);
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TemplateId->Destroy();
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return;
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}
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}
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// There are three options here. If we have 'struct foo;', then
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// this is a forward declaration. If we have 'struct foo {...' or
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// 'struct foo :...' then this is a definition. Otherwise we have
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// something like 'struct foo xyz', a reference.
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Action::TagKind TK;
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if (Tok.is(tok::l_brace) || (getLang().CPlusPlus && Tok.is(tok::colon)))
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TK = Action::TK_Definition;
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else if (Tok.is(tok::semi))
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TK = Action::TK_Declaration;
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else
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TK = Action::TK_Reference;
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if (!Name && !TemplateId && TK != Action::TK_Definition) {
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// We have a declaration or reference to an anonymous class.
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Diag(StartLoc, diag::err_anon_type_definition)
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<< DeclSpec::getSpecifierName(TagType);
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// Skip the rest of this declarator, up until the comma or semicolon.
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SkipUntil(tok::comma, true);
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if (TemplateId)
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TemplateId->Destroy();
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return;
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}
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// Create the tag portion of the class or class template.
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Action::DeclResult TagOrTempResult;
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if (TemplateId && TK != Action::TK_Reference) {
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// Explicit specialization or class template partial
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// specialization. Let semantic analysis decide.
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ASTTemplateArgsPtr TemplateArgsPtr(Actions,
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TemplateId->getTemplateArgs(),
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TemplateId->getTemplateArgIsType(),
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TemplateId->NumArgs);
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TagOrTempResult
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= Actions.ActOnClassTemplateSpecialization(CurScope, TagType, TK,
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StartLoc, SS,
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TemplateTy::make(TemplateId->Template),
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TemplateId->TemplateNameLoc,
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TemplateId->LAngleLoc,
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TemplateArgsPtr,
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TemplateId->getTemplateArgLocations(),
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TemplateId->RAngleLoc,
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Attr,
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Action::MultiTemplateParamsArg(Actions,
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TemplateParams? &(*TemplateParams)[0] : 0,
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TemplateParams? TemplateParams->size() : 0));
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TemplateId->Destroy();
|
|
} else if (TemplateParams && TK != Action::TK_Reference)
|
|
TagOrTempResult = Actions.ActOnClassTemplate(CurScope, TagType, TK,
|
|
StartLoc, SS, Name, NameLoc,
|
|
Attr,
|
|
Action::MultiTemplateParamsArg(Actions,
|
|
&(*TemplateParams)[0],
|
|
TemplateParams->size()),
|
|
AS);
|
|
else
|
|
TagOrTempResult = Actions.ActOnTag(CurScope, TagType, TK, StartLoc, SS, Name,
|
|
NameLoc, Attr, AS);
|
|
|
|
// Parse the optional base clause (C++ only).
|
|
if (getLang().CPlusPlus && Tok.is(tok::colon))
|
|
ParseBaseClause(TagOrTempResult.get());
|
|
|
|
// If there is a body, parse it and inform the actions module.
|
|
if (Tok.is(tok::l_brace))
|
|
if (getLang().CPlusPlus)
|
|
ParseCXXMemberSpecification(StartLoc, TagType, TagOrTempResult.get());
|
|
else
|
|
ParseStructUnionBody(StartLoc, TagType, TagOrTempResult.get());
|
|
else if (TK == Action::TK_Definition) {
|
|
// FIXME: Complain that we have a base-specifier list but no
|
|
// definition.
|
|
Diag(Tok, diag::err_expected_lbrace);
|
|
}
|
|
|
|
const char *PrevSpec = 0;
|
|
if (TagOrTempResult.isInvalid())
|
|
DS.SetTypeSpecError();
|
|
else if (DS.SetTypeSpecType(TagType, StartLoc, PrevSpec,
|
|
TagOrTempResult.get().getAs<void>()))
|
|
Diag(StartLoc, diag::err_invalid_decl_spec_combination) << PrevSpec;
|
|
}
|
|
|
|
/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived].
|
|
///
|
|
/// base-clause : [C++ class.derived]
|
|
/// ':' base-specifier-list
|
|
/// base-specifier-list:
|
|
/// base-specifier '...'[opt]
|
|
/// base-specifier-list ',' base-specifier '...'[opt]
|
|
void Parser::ParseBaseClause(DeclPtrTy ClassDecl) {
|
|
assert(Tok.is(tok::colon) && "Not a base clause");
|
|
ConsumeToken();
|
|
|
|
// Build up an array of parsed base specifiers.
|
|
llvm::SmallVector<BaseTy *, 8> BaseInfo;
|
|
|
|
while (true) {
|
|
// Parse a base-specifier.
|
|
BaseResult Result = ParseBaseSpecifier(ClassDecl);
|
|
if (Result.isInvalid()) {
|
|
// Skip the rest of this base specifier, up until the comma or
|
|
// opening brace.
|
|
SkipUntil(tok::comma, tok::l_brace, true, true);
|
|
} else {
|
|
// Add this to our array of base specifiers.
|
|
BaseInfo.push_back(Result.get());
|
|
}
|
|
|
|
// If the next token is a comma, consume it and keep reading
|
|
// base-specifiers.
|
|
if (Tok.isNot(tok::comma)) break;
|
|
|
|
// Consume the comma.
|
|
ConsumeToken();
|
|
}
|
|
|
|
// Attach the base specifiers
|
|
Actions.ActOnBaseSpecifiers(ClassDecl, &BaseInfo[0], BaseInfo.size());
|
|
}
|
|
|
|
/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is
|
|
/// one entry in the base class list of a class specifier, for example:
|
|
/// class foo : public bar, virtual private baz {
|
|
/// 'public bar' and 'virtual private baz' are each base-specifiers.
|
|
///
|
|
/// base-specifier: [C++ class.derived]
|
|
/// ::[opt] nested-name-specifier[opt] class-name
|
|
/// 'virtual' access-specifier[opt] ::[opt] nested-name-specifier[opt]
|
|
/// class-name
|
|
/// access-specifier 'virtual'[opt] ::[opt] nested-name-specifier[opt]
|
|
/// class-name
|
|
Parser::BaseResult Parser::ParseBaseSpecifier(DeclPtrTy ClassDecl) {
|
|
bool IsVirtual = false;
|
|
SourceLocation StartLoc = Tok.getLocation();
|
|
|
|
// Parse the 'virtual' keyword.
|
|
if (Tok.is(tok::kw_virtual)) {
|
|
ConsumeToken();
|
|
IsVirtual = true;
|
|
}
|
|
|
|
// Parse an (optional) access specifier.
|
|
AccessSpecifier Access = getAccessSpecifierIfPresent();
|
|
if (Access)
|
|
ConsumeToken();
|
|
|
|
// Parse the 'virtual' keyword (again!), in case it came after the
|
|
// access specifier.
|
|
if (Tok.is(tok::kw_virtual)) {
|
|
SourceLocation VirtualLoc = ConsumeToken();
|
|
if (IsVirtual) {
|
|
// Complain about duplicate 'virtual'
|
|
Diag(VirtualLoc, diag::err_dup_virtual)
|
|
<< CodeModificationHint::CreateRemoval(SourceRange(VirtualLoc));
|
|
}
|
|
|
|
IsVirtual = true;
|
|
}
|
|
|
|
// Parse optional '::' and optional nested-name-specifier.
|
|
CXXScopeSpec SS;
|
|
ParseOptionalCXXScopeSpecifier(SS);
|
|
|
|
// The location of the base class itself.
|
|
SourceLocation BaseLoc = Tok.getLocation();
|
|
|
|
// Parse the class-name.
|
|
SourceLocation EndLocation;
|
|
TypeResult BaseType = ParseClassName(EndLocation, &SS);
|
|
if (BaseType.isInvalid())
|
|
return true;
|
|
|
|
// Find the complete source range for the base-specifier.
|
|
SourceRange Range(StartLoc, EndLocation);
|
|
|
|
// Notify semantic analysis that we have parsed a complete
|
|
// base-specifier.
|
|
return Actions.ActOnBaseSpecifier(ClassDecl, Range, IsVirtual, Access,
|
|
BaseType.get(), BaseLoc);
|
|
}
|
|
|
|
/// getAccessSpecifierIfPresent - Determine whether the next token is
|
|
/// a C++ access-specifier.
|
|
///
|
|
/// access-specifier: [C++ class.derived]
|
|
/// 'private'
|
|
/// 'protected'
|
|
/// 'public'
|
|
AccessSpecifier Parser::getAccessSpecifierIfPresent() const
|
|
{
|
|
switch (Tok.getKind()) {
|
|
default: return AS_none;
|
|
case tok::kw_private: return AS_private;
|
|
case tok::kw_protected: return AS_protected;
|
|
case tok::kw_public: return AS_public;
|
|
}
|
|
}
|
|
|
|
/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration.
|
|
///
|
|
/// member-declaration:
|
|
/// decl-specifier-seq[opt] member-declarator-list[opt] ';'
|
|
/// function-definition ';'[opt]
|
|
/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO]
|
|
/// using-declaration [TODO]
|
|
/// [C++0x] static_assert-declaration
|
|
/// template-declaration
|
|
/// [GNU] '__extension__' member-declaration
|
|
///
|
|
/// member-declarator-list:
|
|
/// member-declarator
|
|
/// member-declarator-list ',' member-declarator
|
|
///
|
|
/// member-declarator:
|
|
/// declarator pure-specifier[opt]
|
|
/// declarator constant-initializer[opt]
|
|
/// identifier[opt] ':' constant-expression
|
|
///
|
|
/// pure-specifier:
|
|
/// '= 0'
|
|
///
|
|
/// constant-initializer:
|
|
/// '=' constant-expression
|
|
///
|
|
void Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS) {
|
|
// static_assert-declaration
|
|
if (Tok.is(tok::kw_static_assert)) {
|
|
SourceLocation DeclEnd;
|
|
ParseStaticAssertDeclaration(DeclEnd);
|
|
return;
|
|
}
|
|
|
|
if (Tok.is(tok::kw_template)) {
|
|
SourceLocation DeclEnd;
|
|
ParseTemplateDeclarationOrSpecialization(Declarator::MemberContext, DeclEnd,
|
|
AS);
|
|
return;
|
|
}
|
|
|
|
// Handle: member-declaration ::= '__extension__' member-declaration
|
|
if (Tok.is(tok::kw___extension__)) {
|
|
// __extension__ silences extension warnings in the subexpression.
|
|
ExtensionRAIIObject O(Diags); // Use RAII to do this.
|
|
ConsumeToken();
|
|
return ParseCXXClassMemberDeclaration(AS);
|
|
}
|
|
|
|
SourceLocation DSStart = Tok.getLocation();
|
|
// decl-specifier-seq:
|
|
// Parse the common declaration-specifiers piece.
|
|
DeclSpec DS;
|
|
ParseDeclarationSpecifiers(DS, 0, AS);
|
|
|
|
if (Tok.is(tok::semi)) {
|
|
ConsumeToken();
|
|
// C++ 9.2p7: The member-declarator-list can be omitted only after a
|
|
// class-specifier or an enum-specifier or in a friend declaration.
|
|
// FIXME: Friend declarations.
|
|
switch (DS.getTypeSpecType()) {
|
|
case DeclSpec::TST_struct:
|
|
case DeclSpec::TST_union:
|
|
case DeclSpec::TST_class:
|
|
case DeclSpec::TST_enum:
|
|
Actions.ParsedFreeStandingDeclSpec(CurScope, DS);
|
|
return;
|
|
default:
|
|
Diag(DSStart, diag::err_no_declarators);
|
|
return;
|
|
}
|
|
}
|
|
|
|
Declarator DeclaratorInfo(DS, Declarator::MemberContext);
|
|
|
|
if (Tok.isNot(tok::colon)) {
|
|
// Parse the first declarator.
|
|
ParseDeclarator(DeclaratorInfo);
|
|
// Error parsing the declarator?
|
|
if (!DeclaratorInfo.hasName()) {
|
|
// If so, skip until the semi-colon or a }.
|
|
SkipUntil(tok::r_brace, true);
|
|
if (Tok.is(tok::semi))
|
|
ConsumeToken();
|
|
return;
|
|
}
|
|
|
|
// function-definition:
|
|
if (Tok.is(tok::l_brace)
|
|
|| (DeclaratorInfo.isFunctionDeclarator() && Tok.is(tok::colon))) {
|
|
if (!DeclaratorInfo.isFunctionDeclarator()) {
|
|
Diag(Tok, diag::err_func_def_no_params);
|
|
ConsumeBrace();
|
|
SkipUntil(tok::r_brace, true);
|
|
return;
|
|
}
|
|
|
|
if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
|
|
Diag(Tok, diag::err_function_declared_typedef);
|
|
// This recovery skips the entire function body. It would be nice
|
|
// to simply call ParseCXXInlineMethodDef() below, however Sema
|
|
// assumes the declarator represents a function, not a typedef.
|
|
ConsumeBrace();
|
|
SkipUntil(tok::r_brace, true);
|
|
return;
|
|
}
|
|
|
|
ParseCXXInlineMethodDef(AS, DeclaratorInfo);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// member-declarator-list:
|
|
// member-declarator
|
|
// member-declarator-list ',' member-declarator
|
|
|
|
llvm::SmallVector<DeclPtrTy, 8> DeclsInGroup;
|
|
OwningExprResult BitfieldSize(Actions);
|
|
OwningExprResult Init(Actions);
|
|
bool Deleted = false;
|
|
|
|
while (1) {
|
|
|
|
// member-declarator:
|
|
// declarator pure-specifier[opt]
|
|
// declarator constant-initializer[opt]
|
|
// identifier[opt] ':' constant-expression
|
|
|
|
if (Tok.is(tok::colon)) {
|
|
ConsumeToken();
|
|
BitfieldSize = ParseConstantExpression();
|
|
if (BitfieldSize.isInvalid())
|
|
SkipUntil(tok::comma, true, true);
|
|
}
|
|
|
|
// pure-specifier:
|
|
// '= 0'
|
|
//
|
|
// constant-initializer:
|
|
// '=' constant-expression
|
|
//
|
|
// defaulted/deleted function-definition:
|
|
// '=' 'default' [TODO]
|
|
// '=' 'delete'
|
|
|
|
if (Tok.is(tok::equal)) {
|
|
ConsumeToken();
|
|
if (getLang().CPlusPlus0x && Tok.is(tok::kw_delete)) {
|
|
ConsumeToken();
|
|
Deleted = true;
|
|
} else {
|
|
Init = ParseInitializer();
|
|
if (Init.isInvalid())
|
|
SkipUntil(tok::comma, true, true);
|
|
}
|
|
}
|
|
|
|
// If attributes exist after the declarator, parse them.
|
|
if (Tok.is(tok::kw___attribute)) {
|
|
SourceLocation Loc;
|
|
AttributeList *AttrList = ParseAttributes(&Loc);
|
|
DeclaratorInfo.AddAttributes(AttrList, Loc);
|
|
}
|
|
|
|
// NOTE: If Sema is the Action module and declarator is an instance field,
|
|
// this call will *not* return the created decl; It will return null.
|
|
// See Sema::ActOnCXXMemberDeclarator for details.
|
|
DeclPtrTy ThisDecl = Actions.ActOnCXXMemberDeclarator(CurScope, AS,
|
|
DeclaratorInfo,
|
|
BitfieldSize.release(),
|
|
Init.release(),
|
|
Deleted);
|
|
if (ThisDecl)
|
|
DeclsInGroup.push_back(ThisDecl);
|
|
|
|
if (DeclaratorInfo.isFunctionDeclarator() &&
|
|
DeclaratorInfo.getDeclSpec().getStorageClassSpec()
|
|
!= DeclSpec::SCS_typedef) {
|
|
// We just declared a member function. If this member function
|
|
// has any default arguments, we'll need to parse them later.
|
|
LateParsedMethodDeclaration *LateMethod = 0;
|
|
DeclaratorChunk::FunctionTypeInfo &FTI
|
|
= DeclaratorInfo.getTypeObject(0).Fun;
|
|
for (unsigned ParamIdx = 0; ParamIdx < FTI.NumArgs; ++ParamIdx) {
|
|
if (LateMethod || FTI.ArgInfo[ParamIdx].DefaultArgTokens) {
|
|
if (!LateMethod) {
|
|
// Push this method onto the stack of late-parsed method
|
|
// declarations.
|
|
getCurTopClassStack().MethodDecls.push_back(
|
|
LateParsedMethodDeclaration(ThisDecl));
|
|
LateMethod = &getCurTopClassStack().MethodDecls.back();
|
|
|
|
// Add all of the parameters prior to this one (they don't
|
|
// have default arguments).
|
|
LateMethod->DefaultArgs.reserve(FTI.NumArgs);
|
|
for (unsigned I = 0; I < ParamIdx; ++I)
|
|
LateMethod->DefaultArgs.push_back(
|
|
LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param));
|
|
}
|
|
|
|
// Add this parameter to the list of parameters (it or may
|
|
// not have a default argument).
|
|
LateMethod->DefaultArgs.push_back(
|
|
LateParsedDefaultArgument(FTI.ArgInfo[ParamIdx].Param,
|
|
FTI.ArgInfo[ParamIdx].DefaultArgTokens));
|
|
}
|
|
}
|
|
}
|
|
|
|
// If we don't have a comma, it is either the end of the list (a ';')
|
|
// or an error, bail out.
|
|
if (Tok.isNot(tok::comma))
|
|
break;
|
|
|
|
// Consume the comma.
|
|
ConsumeToken();
|
|
|
|
// Parse the next declarator.
|
|
DeclaratorInfo.clear();
|
|
BitfieldSize = 0;
|
|
Init = 0;
|
|
Deleted = false;
|
|
|
|
// Attributes are only allowed on the second declarator.
|
|
if (Tok.is(tok::kw___attribute)) {
|
|
SourceLocation Loc;
|
|
AttributeList *AttrList = ParseAttributes(&Loc);
|
|
DeclaratorInfo.AddAttributes(AttrList, Loc);
|
|
}
|
|
|
|
if (Tok.isNot(tok::colon))
|
|
ParseDeclarator(DeclaratorInfo);
|
|
}
|
|
|
|
if (Tok.is(tok::semi)) {
|
|
ConsumeToken();
|
|
Actions.FinalizeDeclaratorGroup(CurScope, &DeclsInGroup[0],
|
|
DeclsInGroup.size());
|
|
return;
|
|
}
|
|
|
|
Diag(Tok, diag::err_expected_semi_decl_list);
|
|
// Skip to end of block or statement
|
|
SkipUntil(tok::r_brace, true, true);
|
|
if (Tok.is(tok::semi))
|
|
ConsumeToken();
|
|
return;
|
|
}
|
|
|
|
/// ParseCXXMemberSpecification - Parse the class definition.
|
|
///
|
|
/// member-specification:
|
|
/// member-declaration member-specification[opt]
|
|
/// access-specifier ':' member-specification[opt]
|
|
///
|
|
void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
|
|
unsigned TagType, DeclPtrTy TagDecl) {
|
|
assert((TagType == DeclSpec::TST_struct ||
|
|
TagType == DeclSpec::TST_union ||
|
|
TagType == DeclSpec::TST_class) && "Invalid TagType!");
|
|
|
|
PrettyStackTraceActionsDecl CrashInfo(TagDecl, RecordLoc, Actions,
|
|
PP.getSourceManager(),
|
|
"parsing struct/union/class body");
|
|
|
|
SourceLocation LBraceLoc = ConsumeBrace();
|
|
|
|
if (!CurScope->isClassScope() && // Not about to define a nested class.
|
|
CurScope->isInCXXInlineMethodScope()) {
|
|
// We will define a local class of an inline method.
|
|
// Push a new LexedMethodsForTopClass for its inline methods.
|
|
PushTopClassStack();
|
|
}
|
|
|
|
// Enter a scope for the class.
|
|
ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
|
|
|
|
if (TagDecl)
|
|
Actions.ActOnTagStartDefinition(CurScope, TagDecl);
|
|
else {
|
|
SkipUntil(tok::r_brace, false, false);
|
|
return;
|
|
}
|
|
|
|
// C++ 11p3: Members of a class defined with the keyword class are private
|
|
// by default. Members of a class defined with the keywords struct or union
|
|
// are public by default.
|
|
AccessSpecifier CurAS;
|
|
if (TagType == DeclSpec::TST_class)
|
|
CurAS = AS_private;
|
|
else
|
|
CurAS = AS_public;
|
|
|
|
// While we still have something to read, read the member-declarations.
|
|
while (Tok.isNot(tok::r_brace) && Tok.isNot(tok::eof)) {
|
|
// Each iteration of this loop reads one member-declaration.
|
|
|
|
// Check for extraneous top-level semicolon.
|
|
if (Tok.is(tok::semi)) {
|
|
Diag(Tok, diag::ext_extra_struct_semi);
|
|
ConsumeToken();
|
|
continue;
|
|
}
|
|
|
|
AccessSpecifier AS = getAccessSpecifierIfPresent();
|
|
if (AS != AS_none) {
|
|
// Current token is a C++ access specifier.
|
|
CurAS = AS;
|
|
ConsumeToken();
|
|
ExpectAndConsume(tok::colon, diag::err_expected_colon);
|
|
continue;
|
|
}
|
|
|
|
// Parse all the comma separated declarators.
|
|
ParseCXXClassMemberDeclaration(CurAS);
|
|
}
|
|
|
|
SourceLocation RBraceLoc = MatchRHSPunctuation(tok::r_brace, LBraceLoc);
|
|
|
|
AttributeList *AttrList = 0;
|
|
// If attributes exist after class contents, parse them.
|
|
if (Tok.is(tok::kw___attribute))
|
|
AttrList = ParseAttributes(); // FIXME: where should I put them?
|
|
|
|
Actions.ActOnFinishCXXMemberSpecification(CurScope, RecordLoc, TagDecl,
|
|
LBraceLoc, RBraceLoc);
|
|
|
|
// C++ 9.2p2: Within the class member-specification, the class is regarded as
|
|
// complete within function bodies, default arguments,
|
|
// exception-specifications, and constructor ctor-initializers (including
|
|
// such things in nested classes).
|
|
//
|
|
// FIXME: Only function bodies and constructor ctor-initializers are
|
|
// parsed correctly, fix the rest.
|
|
if (!CurScope->getParent()->isClassScope()) {
|
|
// We are not inside a nested class. This class and its nested classes
|
|
// are complete and we can parse the delayed portions of method
|
|
// declarations and the lexed inline method definitions.
|
|
ParseLexedMethodDeclarations();
|
|
ParseLexedMethodDefs();
|
|
|
|
// For a local class of inline method, pop the LexedMethodsForTopClass that
|
|
// was previously pushed.
|
|
|
|
assert((CurScope->isInCXXInlineMethodScope() ||
|
|
TopClassStacks.size() == 1) &&
|
|
"MethodLexers not getting popped properly!");
|
|
if (CurScope->isInCXXInlineMethodScope())
|
|
PopTopClassStack();
|
|
}
|
|
|
|
// Leave the class scope.
|
|
ClassScope.Exit();
|
|
|
|
Actions.ActOnTagFinishDefinition(CurScope, TagDecl);
|
|
}
|
|
|
|
/// ParseConstructorInitializer - Parse a C++ constructor initializer,
|
|
/// which explicitly initializes the members or base classes of a
|
|
/// class (C++ [class.base.init]). For example, the three initializers
|
|
/// after the ':' in the Derived constructor below:
|
|
///
|
|
/// @code
|
|
/// class Base { };
|
|
/// class Derived : Base {
|
|
/// int x;
|
|
/// float f;
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|
/// public:
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/// Derived(float f) : Base(), x(17), f(f) { }
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/// };
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|
/// @endcode
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|
///
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|
/// [C++] ctor-initializer:
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/// ':' mem-initializer-list
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|
///
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|
/// [C++] mem-initializer-list:
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|
/// mem-initializer
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|
/// mem-initializer , mem-initializer-list
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|
void Parser::ParseConstructorInitializer(DeclPtrTy ConstructorDecl) {
|
|
assert(Tok.is(tok::colon) && "Constructor initializer always starts with ':'");
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|
|
|
SourceLocation ColonLoc = ConsumeToken();
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|
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|
llvm::SmallVector<MemInitTy*, 4> MemInitializers;
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|
|
|
do {
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|
MemInitResult MemInit = ParseMemInitializer(ConstructorDecl);
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|
if (!MemInit.isInvalid())
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|
MemInitializers.push_back(MemInit.get());
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|
|
|
if (Tok.is(tok::comma))
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|
ConsumeToken();
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|
else if (Tok.is(tok::l_brace))
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|
break;
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|
else {
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|
// Skip over garbage, until we get to '{'. Don't eat the '{'.
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|
SkipUntil(tok::l_brace, true, true);
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|
break;
|
|
}
|
|
} while (true);
|
|
|
|
Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc,
|
|
&MemInitializers[0], MemInitializers.size());
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|
}
|
|
|
|
/// ParseMemInitializer - Parse a C++ member initializer, which is
|
|
/// part of a constructor initializer that explicitly initializes one
|
|
/// member or base class (C++ [class.base.init]). See
|
|
/// ParseConstructorInitializer for an example.
|
|
///
|
|
/// [C++] mem-initializer:
|
|
/// mem-initializer-id '(' expression-list[opt] ')'
|
|
///
|
|
/// [C++] mem-initializer-id:
|
|
/// '::'[opt] nested-name-specifier[opt] class-name
|
|
/// identifier
|
|
Parser::MemInitResult Parser::ParseMemInitializer(DeclPtrTy ConstructorDecl) {
|
|
// FIXME: parse '::'[opt] nested-name-specifier[opt]
|
|
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected_member_or_base_name);
|
|
return true;
|
|
}
|
|
|
|
// Get the identifier. This may be a member name or a class name,
|
|
// but we'll let the semantic analysis determine which it is.
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
SourceLocation IdLoc = ConsumeToken();
|
|
|
|
// Parse the '('.
|
|
if (Tok.isNot(tok::l_paren)) {
|
|
Diag(Tok, diag::err_expected_lparen);
|
|
return true;
|
|
}
|
|
SourceLocation LParenLoc = ConsumeParen();
|
|
|
|
// Parse the optional expression-list.
|
|
ExprVector ArgExprs(Actions);
|
|
CommaLocsTy CommaLocs;
|
|
if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) {
|
|
SkipUntil(tok::r_paren);
|
|
return true;
|
|
}
|
|
|
|
SourceLocation RParenLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
|
|
return Actions.ActOnMemInitializer(ConstructorDecl, CurScope, II, IdLoc,
|
|
LParenLoc, ArgExprs.take(),
|
|
ArgExprs.size(), &CommaLocs[0], RParenLoc);
|
|
}
|
|
|
|
/// ParseExceptionSpecification - Parse a C++ exception-specification
|
|
/// (C++ [except.spec]).
|
|
///
|
|
/// exception-specification:
|
|
/// 'throw' '(' type-id-list [opt] ')'
|
|
/// [MS] 'throw' '(' '...' ')'
|
|
///
|
|
/// type-id-list:
|
|
/// type-id
|
|
/// type-id-list ',' type-id
|
|
///
|
|
bool Parser::ParseExceptionSpecification(SourceLocation &EndLoc) {
|
|
assert(Tok.is(tok::kw_throw) && "expected throw");
|
|
|
|
SourceLocation ThrowLoc = ConsumeToken();
|
|
|
|
if (!Tok.is(tok::l_paren)) {
|
|
return Diag(Tok, diag::err_expected_lparen_after) << "throw";
|
|
}
|
|
SourceLocation LParenLoc = ConsumeParen();
|
|
|
|
// Parse throw(...), a Microsoft extension that means "this function
|
|
// can throw anything".
|
|
if (Tok.is(tok::ellipsis)) {
|
|
SourceLocation EllipsisLoc = ConsumeToken();
|
|
if (!getLang().Microsoft)
|
|
Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec);
|
|
EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
return false;
|
|
}
|
|
|
|
// Parse the sequence of type-ids.
|
|
while (Tok.isNot(tok::r_paren)) {
|
|
ParseTypeName();
|
|
if (Tok.is(tok::comma))
|
|
ConsumeToken();
|
|
else
|
|
break;
|
|
}
|
|
|
|
EndLoc = MatchRHSPunctuation(tok::r_paren, LParenLoc);
|
|
return false;
|
|
}
|