2008-06-25 06:12:16 +08:00
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//===--- ParseCXXInlineMethods.cpp - C++ class inline methods 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 parsing for C++ class inline methods.
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//
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//===----------------------------------------------------------------------===//
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2009-01-29 13:15:15 +08:00
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#include "clang/Parse/ParseDiagnostic.h"
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2008-06-25 06:12:16 +08:00
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#include "clang/Parse/Parser.h"
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#include "clang/Parse/DeclSpec.h"
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#include "clang/Parse/Scope.h"
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using namespace clang;
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2009-04-27 04:35:05 +08:00
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/// ParseCXXInlineMethodDef - We parsed and verified that the specified
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2008-06-25 06:12:16 +08:00
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/// Declarator is a well formed C++ inline method definition. Now lex its body
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/// and store its tokens for parsing after the C++ class is complete.
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2009-03-29 03:18:32 +08:00
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Parser::DeclPtrTy
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2009-08-21 06:52:58 +08:00
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Parser::ParseCXXInlineMethodDef(AccessSpecifier AS, Declarator &D,
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const ParsedTemplateInfo &TemplateInfo) {
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2008-06-25 06:12:16 +08:00
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assert(D.getTypeObject(0).Kind == DeclaratorChunk::Function &&
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"This isn't a function declarator!");
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2009-04-27 04:35:05 +08:00
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assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try)) &&
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"Current token not a '{', ':' or 'try'!");
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2008-06-25 06:12:16 +08:00
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2009-08-21 06:52:58 +08:00
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Action::MultiTemplateParamsArg TemplateParams(Actions,
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TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data() : 0,
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TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0);
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2009-08-06 10:15:43 +08:00
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DeclPtrTy FnD;
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if (D.getDeclSpec().isFriendSpecified())
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2009-08-21 06:52:58 +08:00
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// FIXME: Friend templates
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2009-08-11 14:59:38 +08:00
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FnD = Actions.ActOnFriendDecl(CurScope, &D, /*IsDefinition*/ true);
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2009-08-21 06:52:58 +08:00
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else // FIXME: pass template information through
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FnD = Actions.ActOnCXXMemberDeclarator(CurScope, AS, D,
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move(TemplateParams), 0, 0);
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2008-06-25 06:12:16 +08:00
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2009-07-23 05:45:50 +08:00
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HandleMemberFunctionDefaultArgs(D, FnD);
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2008-06-25 06:12:16 +08:00
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// Consume the tokens and store them for later parsing.
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2009-05-28 07:11:45 +08:00
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getCurrentClass().MethodDefs.push_back(LexedMethod(FnD));
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2009-08-22 08:34:47 +08:00
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getCurrentClass().MethodDefs.back().TemplateScope
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= CurScope->isTemplateParamScope();
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2009-05-28 07:11:45 +08:00
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CachedTokens &Toks = getCurrentClass().MethodDefs.back().Toks;
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2008-06-25 06:12:16 +08:00
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2009-04-27 04:35:05 +08:00
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tok::TokenKind kind = Tok.getKind();
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// We may have a constructor initializer or function-try-block here.
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if (kind == tok::colon || kind == tok::kw_try) {
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2008-11-05 12:29:56 +08:00
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// Consume everything up to (and including) the left brace.
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2008-12-17 05:30:33 +08:00
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if (!ConsumeAndStoreUntil(tok::l_brace, tok::unknown, Toks, tok::semi)) {
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2008-11-11 00:59:40 +08:00
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// We didn't find the left-brace we expected after the
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// constructor initializer.
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if (Tok.is(tok::semi)) {
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// We found a semicolon; complain, consume the semicolon, and
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// don't try to parse this method later.
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Diag(Tok.getLocation(), diag::err_expected_lbrace);
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ConsumeAnyToken();
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2009-05-28 07:11:45 +08:00
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getCurrentClass().MethodDefs.pop_back();
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2008-11-11 00:59:40 +08:00
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return FnD;
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}
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}
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2008-11-05 12:29:56 +08:00
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} else {
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// Begin by storing the '{' token.
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Toks.push_back(Tok);
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ConsumeBrace();
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}
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// Consume everything up to (and including) the matching right brace.
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2008-12-17 05:30:33 +08:00
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ConsumeAndStoreUntil(tok::r_brace, tok::unknown, Toks);
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2008-06-25 06:12:16 +08:00
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2009-04-27 04:35:05 +08:00
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// If we're in a function-try-block, we need to store all the catch blocks.
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if (kind == tok::kw_try) {
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while (Tok.is(tok::kw_catch)) {
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ConsumeAndStoreUntil(tok::l_brace, tok::unknown, Toks);
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ConsumeAndStoreUntil(tok::r_brace, tok::unknown, Toks);
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}
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}
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2008-06-25 06:12:16 +08:00
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return FnD;
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}
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2008-12-17 05:30:33 +08:00
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/// ParseLexedMethodDeclarations - We finished parsing the member
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/// specification of a top (non-nested) C++ class. Now go over the
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/// stack of method declarations with some parts for which parsing was
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/// delayed (such as default arguments) and parse them.
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2009-05-28 07:11:45 +08:00
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void Parser::ParseLexedMethodDeclarations(ParsingClass &Class) {
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bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
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ParseScope TemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
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if (HasTemplateScope)
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Actions.ActOnReenterTemplateScope(CurScope, Class.TagOrTemplate);
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bool HasClassScope = !Class.TopLevelClass;
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ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
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HasClassScope);
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for (; !Class.MethodDecls.empty(); Class.MethodDecls.pop_front()) {
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LateParsedMethodDeclaration &LM = Class.MethodDecls.front();
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2008-12-17 05:30:33 +08:00
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2009-08-22 08:34:47 +08:00
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// If this is a member template, introduce the template parameter scope.
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ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
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if (LM.TemplateScope)
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Actions.ActOnReenterTemplateScope(CurScope, LM.Method);
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2008-12-17 05:30:33 +08:00
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// Start the delayed C++ method declaration
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Actions.ActOnStartDelayedCXXMethodDeclaration(CurScope, LM.Method);
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// Introduce the parameters into scope and parse their default
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// arguments.
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2009-01-10 06:42:13 +08:00
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ParseScope PrototypeScope(this,
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Scope::FunctionPrototypeScope|Scope::DeclScope);
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2008-12-17 05:30:33 +08:00
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for (unsigned I = 0, N = LM.DefaultArgs.size(); I != N; ++I) {
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// Introduce the parameter into scope.
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Actions.ActOnDelayedCXXMethodParameter(CurScope, LM.DefaultArgs[I].Param);
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if (CachedTokens *Toks = LM.DefaultArgs[I].Toks) {
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// Parse the default argument from its saved token stream.
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Toks->push_back(Tok); // So that the current token doesn't get lost
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PP.EnterTokenStream(&Toks->front(), Toks->size(), true, false);
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// Consume the previously-pushed token.
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ConsumeAnyToken();
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// Consume the '='.
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assert(Tok.is(tok::equal) && "Default argument not starting with '='");
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SourceLocation EqualLoc = ConsumeToken();
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OwningExprResult DefArgResult(ParseAssignmentExpression());
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if (DefArgResult.isInvalid())
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Actions.ActOnParamDefaultArgumentError(LM.DefaultArgs[I].Param);
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else
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Actions.ActOnParamDefaultArgument(LM.DefaultArgs[I].Param, EqualLoc,
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2009-03-16 01:47:39 +08:00
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move(DefArgResult));
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2008-12-17 05:30:33 +08:00
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delete Toks;
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LM.DefaultArgs[I].Toks = 0;
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}
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}
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PrototypeScope.Exit();
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// Finish the delayed C++ method declaration.
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Actions.ActOnFinishDelayedCXXMethodDeclaration(CurScope, LM.Method);
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}
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2009-05-28 07:11:45 +08:00
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for (unsigned I = 0, N = Class.NestedClasses.size(); I != N; ++I)
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ParseLexedMethodDeclarations(*Class.NestedClasses[I]);
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2008-12-17 05:30:33 +08:00
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}
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2008-06-25 06:12:16 +08:00
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/// ParseLexedMethodDefs - We finished parsing the member specification of a top
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/// (non-nested) C++ class. Now go over the stack of lexed methods that were
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/// collected during its parsing and parse them all.
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2009-05-28 07:11:45 +08:00
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void Parser::ParseLexedMethodDefs(ParsingClass &Class) {
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bool HasTemplateScope = !Class.TopLevelClass && Class.TemplateScope;
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ParseScope TemplateScope(this, Scope::TemplateParamScope, HasTemplateScope);
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if (HasTemplateScope)
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Actions.ActOnReenterTemplateScope(CurScope, Class.TagOrTemplate);
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bool HasClassScope = !Class.TopLevelClass;
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ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope,
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HasClassScope);
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for (; !Class.MethodDefs.empty(); Class.MethodDefs.pop_front()) {
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LexedMethod &LM = Class.MethodDefs.front();
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2008-06-25 06:12:16 +08:00
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2009-08-22 08:34:47 +08:00
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// If this is a member template, introduce the template parameter scope.
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ParseScope TemplateScope(this, Scope::TemplateParamScope, LM.TemplateScope);
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if (LM.TemplateScope)
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Actions.ActOnReenterTemplateScope(CurScope, LM.D);
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2008-06-25 06:12:16 +08:00
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assert(!LM.Toks.empty() && "Empty body!");
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// Append the current token at the end of the new token stream so that it
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// doesn't get lost.
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LM.Toks.push_back(Tok);
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PP.EnterTokenStream(&LM.Toks.front(), LM.Toks.size(), true, false);
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// Consume the previously pushed token.
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ConsumeAnyToken();
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2009-04-27 04:35:05 +08:00
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assert((Tok.is(tok::l_brace) || Tok.is(tok::colon) || Tok.is(tok::kw_try))
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&& "Inline method not starting with '{', ':' or 'try'");
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2008-06-25 06:12:16 +08:00
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// Parse the method body. Function body parsing code is similar enough
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// to be re-used for method bodies as well.
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2008-12-10 14:34:36 +08:00
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ParseScope FnScope(this, Scope::FnScope|Scope::DeclScope);
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2008-06-25 06:12:16 +08:00
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Actions.ActOnStartOfFunctionDef(CurScope, LM.D);
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2009-04-27 04:35:05 +08:00
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if (Tok.is(tok::kw_try)) {
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ParseFunctionTryBlock(LM.D);
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2009-04-27 05:08:36 +08:00
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continue;
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2009-04-27 04:35:05 +08:00
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}
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2008-11-05 12:29:56 +08:00
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if (Tok.is(tok::colon))
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ParseConstructorInitializer(LM.D);
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2009-07-15 04:06:22 +08:00
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else
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2009-07-22 06:36:06 +08:00
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Actions.ActOnDefaultCtorInitializers(LM.D);
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2009-07-15 02:24:21 +08:00
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2009-03-05 08:49:17 +08:00
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// FIXME: What if ParseConstructorInitializer doesn't leave us with a '{'??
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ParseFunctionStatementBody(LM.D);
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2008-06-25 06:12:16 +08:00
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}
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2009-05-28 07:11:45 +08:00
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for (unsigned I = 0, N = Class.NestedClasses.size(); I != N; ++I)
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ParseLexedMethodDefs(*Class.NestedClasses[I]);
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2008-06-25 06:12:16 +08:00
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}
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/// ConsumeAndStoreUntil - Consume and store the token at the passed token
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2008-12-17 05:30:33 +08:00
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/// container until the token 'T' is reached (which gets
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/// consumed/stored too, if ConsumeFinalToken).
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2008-11-11 00:59:40 +08:00
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/// If EarlyAbortIf is specified, then we will stop early if we find that
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/// token at the top level.
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2008-12-17 05:30:33 +08:00
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/// Returns true if token 'T1' or 'T2' was found.
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2008-06-25 06:12:16 +08:00
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/// NOTE: This is a specialized version of Parser::SkipUntil.
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2008-12-17 05:30:33 +08:00
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bool Parser::ConsumeAndStoreUntil(tok::TokenKind T1, tok::TokenKind T2,
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CachedTokens &Toks,
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tok::TokenKind EarlyAbortIf,
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bool ConsumeFinalToken) {
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2008-06-25 06:12:16 +08:00
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// We always want this function to consume at least one token if the first
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// token isn't T and if not at EOF.
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bool isFirstTokenConsumed = true;
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while (1) {
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// If we found one of the tokens, stop and return true.
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2008-12-17 05:30:33 +08:00
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if (Tok.is(T1) || Tok.is(T2)) {
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if (ConsumeFinalToken) {
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Toks.push_back(Tok);
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ConsumeAnyToken();
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}
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2008-06-25 06:12:16 +08:00
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return true;
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}
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2008-11-11 00:59:40 +08:00
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// If we found the early-abort token, return.
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if (Tok.is(EarlyAbortIf))
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return false;
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2008-06-25 06:12:16 +08:00
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switch (Tok.getKind()) {
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case tok::eof:
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// Ran out of tokens.
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return false;
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case tok::l_paren:
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// Recursively consume properly-nested parens.
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Toks.push_back(Tok);
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ConsumeParen();
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2008-12-17 05:30:33 +08:00
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ConsumeAndStoreUntil(tok::r_paren, tok::unknown, Toks);
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2008-06-25 06:12:16 +08:00
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break;
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case tok::l_square:
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// Recursively consume properly-nested square brackets.
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Toks.push_back(Tok);
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ConsumeBracket();
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2008-12-17 05:30:33 +08:00
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ConsumeAndStoreUntil(tok::r_square, tok::unknown, Toks);
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2008-06-25 06:12:16 +08:00
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break;
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case tok::l_brace:
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// Recursively consume properly-nested braces.
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Toks.push_back(Tok);
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ConsumeBrace();
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2008-12-17 05:30:33 +08:00
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ConsumeAndStoreUntil(tok::r_brace, tok::unknown, Toks);
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2008-06-25 06:12:16 +08:00
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break;
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// Okay, we found a ']' or '}' or ')', which we think should be balanced.
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// Since the user wasn't looking for this token (if they were, it would
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// already be handled), this isn't balanced. If there is a LHS token at a
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// higher level, we will assume that this matches the unbalanced token
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// and return it. Otherwise, this is a spurious RHS token, which we skip.
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case tok::r_paren:
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if (ParenCount && !isFirstTokenConsumed)
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return false; // Matches something.
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Toks.push_back(Tok);
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ConsumeParen();
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break;
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case tok::r_square:
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if (BracketCount && !isFirstTokenConsumed)
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return false; // Matches something.
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Toks.push_back(Tok);
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ConsumeBracket();
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break;
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case tok::r_brace:
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if (BraceCount && !isFirstTokenConsumed)
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return false; // Matches something.
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Toks.push_back(Tok);
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ConsumeBrace();
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break;
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case tok::string_literal:
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case tok::wide_string_literal:
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Toks.push_back(Tok);
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ConsumeStringToken();
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break;
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default:
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// consume this token.
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Toks.push_back(Tok);
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ConsumeToken();
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break;
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}
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isFirstTokenConsumed = false;
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}
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}
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