AST.cpp 101 KB
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/***************************************************************************
**
** This file is part of Qt Creator
**
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** Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
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**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
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**
** Non-Open Source Usage
**
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** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
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** agreement between you and Nokia.
**
** GNU General Public License Usage
**
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** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt GPL Exception
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** version 1.3, included in the file GPL_EXCEPTION.txt in this package.
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**
***************************************************************************/
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// Copyright (c) 2008 Roberto Raggi <roberto.raggi@gmail.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#include "AST.h"
#include "ASTVisitor.h"
#include "MemoryPool.h"

#include <cassert>
#include <cstddef>
#include <algorithm>

CPLUSPLUS_BEGIN_NAMESPACE

AST::AST()
{ }

AST::~AST()
{ assert(0); }

AccessDeclarationAST *AST::asAccessDeclaration()
{ return dynamic_cast<AccessDeclarationAST *>(this); }

ArrayAccessAST *AST::asArrayAccess()
{ return dynamic_cast<ArrayAccessAST *>(this); }

ArrayDeclaratorAST *AST::asArrayDeclarator()
{ return dynamic_cast<ArrayDeclaratorAST *>(this); }

ArrayInitializerAST *AST::asArrayInitializer()
{ return dynamic_cast<ArrayInitializerAST *>(this); }

AsmDefinitionAST *AST::asAsmDefinition()
{ return dynamic_cast<AsmDefinitionAST *>(this); }

AttributeAST *AST::asAttribute()
{ return dynamic_cast<AttributeAST *>(this); }

AttributeSpecifierAST *AST::asAttributeSpecifier()
{ return dynamic_cast<AttributeSpecifierAST *>(this); }

BaseSpecifierAST *AST::asBaseSpecifier()
{ return dynamic_cast<BaseSpecifierAST *>(this); }

QtMethodAST *AST::asQtMethod()
{ return dynamic_cast<QtMethodAST *>(this); }

BinaryExpressionAST *AST::asBinaryExpression()
{ return dynamic_cast<BinaryExpressionAST *>(this); }

BoolLiteralAST *AST::asBoolLiteral()
{ return dynamic_cast<BoolLiteralAST *>(this); }

BreakStatementAST *AST::asBreakStatement()
{ return dynamic_cast<BreakStatementAST *>(this); }

CallAST *AST::asCall()
{ return dynamic_cast<CallAST *>(this); }

CaseStatementAST *AST::asCaseStatement()
{ return dynamic_cast<CaseStatementAST *>(this); }

CastExpressionAST *AST::asCastExpression()
{ return dynamic_cast<CastExpressionAST *>(this); }

CatchClauseAST *AST::asCatchClause()
{ return dynamic_cast<CatchClauseAST *>(this); }

ClassSpecifierAST *AST::asClassSpecifier()
{ return dynamic_cast<ClassSpecifierAST *>(this); }

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CompoundLiteralAST *AST::asCompoundLiteral()
{ return dynamic_cast<CompoundLiteralAST *>(this); }

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CompoundStatementAST *AST::asCompoundStatement()
{ return dynamic_cast<CompoundStatementAST *>(this); }

ConditionAST *AST::asCondition()
{ return dynamic_cast<ConditionAST *>(this); }

ConditionalExpressionAST *AST::asConditionalExpression()
{ return dynamic_cast<ConditionalExpressionAST *>(this); }

ContinueStatementAST *AST::asContinueStatement()
{ return dynamic_cast<ContinueStatementAST *>(this); }

ConversionFunctionIdAST *AST::asConversionFunctionId()
{ return dynamic_cast<ConversionFunctionIdAST *>(this); }

CoreDeclaratorAST *AST::asCoreDeclarator()
{ return dynamic_cast<CoreDeclaratorAST *>(this); }

CppCastExpressionAST *AST::asCppCastExpression()
{ return dynamic_cast<CppCastExpressionAST *>(this); }

CtorInitializerAST *AST::asCtorInitializer()
{ return dynamic_cast<CtorInitializerAST *>(this); }

DeclarationAST *AST::asDeclaration()
{ return dynamic_cast<DeclarationAST *>(this); }

DeclarationStatementAST *AST::asDeclarationStatement()
{ return dynamic_cast<DeclarationStatementAST *>(this); }

DeclaratorAST *AST::asDeclarator()
{ return dynamic_cast<DeclaratorAST *>(this); }

DeclaratorIdAST *AST::asDeclaratorId()
{ return dynamic_cast<DeclaratorIdAST *>(this); }

DeclaratorListAST *AST::asDeclaratorList()
{ return dynamic_cast<DeclaratorListAST *>(this); }

DeleteExpressionAST *AST::asDeleteExpression()
{ return dynamic_cast<DeleteExpressionAST *>(this); }

DestructorNameAST *AST::asDestructorName()
{ return dynamic_cast<DestructorNameAST *>(this); }

DoStatementAST *AST::asDoStatement()
{ return dynamic_cast<DoStatementAST *>(this); }

ElaboratedTypeSpecifierAST *AST::asElaboratedTypeSpecifier()
{ return dynamic_cast<ElaboratedTypeSpecifierAST *>(this); }

EmptyDeclarationAST *AST::asEmptyDeclaration()
{ return dynamic_cast<EmptyDeclarationAST *>(this); }

EnumSpecifierAST *AST::asEnumSpecifier()
{ return dynamic_cast<EnumSpecifierAST *>(this); }

EnumeratorAST *AST::asEnumerator()
{ return dynamic_cast<EnumeratorAST *>(this); }

ExceptionDeclarationAST *AST::asExceptionDeclaration()
{ return dynamic_cast<ExceptionDeclarationAST *>(this); }

ExceptionSpecificationAST *AST::asExceptionSpecification()
{ return dynamic_cast<ExceptionSpecificationAST *>(this); }

ExpressionAST *AST::asExpression()
{ return dynamic_cast<ExpressionAST *>(this); }

ExpressionListAST *AST::asExpressionList()
{ return dynamic_cast<ExpressionListAST *>(this); }

ExpressionOrDeclarationStatementAST *AST::asExpressionOrDeclarationStatement()
{ return dynamic_cast<ExpressionOrDeclarationStatementAST *>(this); }

ExpressionStatementAST *AST::asExpressionStatement()
{ return dynamic_cast<ExpressionStatementAST *>(this); }

ForStatementAST *AST::asForStatement()
{ return dynamic_cast<ForStatementAST *>(this); }

FunctionDeclaratorAST *AST::asFunctionDeclarator()
{ return dynamic_cast<FunctionDeclaratorAST *>(this); }

FunctionDefinitionAST *AST::asFunctionDefinition()
{ return dynamic_cast<FunctionDefinitionAST *>(this); }

GotoStatementAST *AST::asGotoStatement()
{ return dynamic_cast<GotoStatementAST *>(this); }

IfStatementAST *AST::asIfStatement()
{ return dynamic_cast<IfStatementAST *>(this); }

LabeledStatementAST *AST::asLabeledStatement()
{ return dynamic_cast<LabeledStatementAST *>(this); }

LinkageBodyAST *AST::asLinkageBody()
{ return dynamic_cast<LinkageBodyAST *>(this); }

LinkageSpecificationAST *AST::asLinkageSpecification()
{ return dynamic_cast<LinkageSpecificationAST *>(this); }

MemInitializerAST *AST::asMemInitializer()
{ return dynamic_cast<MemInitializerAST *>(this); }

MemberAccessAST *AST::asMemberAccess()
{ return dynamic_cast<MemberAccessAST *>(this); }

NameAST *AST::asName()
{ return dynamic_cast<NameAST *>(this); }

NamedTypeSpecifierAST *AST::asNamedTypeSpecifier()
{ return dynamic_cast<NamedTypeSpecifierAST *>(this); }

NamespaceAST *AST::asNamespace()
{ return dynamic_cast<NamespaceAST *>(this); }

NamespaceAliasDefinitionAST *AST::asNamespaceAliasDefinition()
{ return dynamic_cast<NamespaceAliasDefinitionAST *>(this); }

NestedDeclaratorAST *AST::asNestedDeclarator()
{ return dynamic_cast<NestedDeclaratorAST *>(this); }

NestedExpressionAST *AST::asNestedExpression()
{ return dynamic_cast<NestedExpressionAST *>(this); }

NestedNameSpecifierAST *AST::asNestedNameSpecifier()
{ return dynamic_cast<NestedNameSpecifierAST *>(this); }

NewDeclaratorAST *AST::asNewDeclarator()
{ return dynamic_cast<NewDeclaratorAST *>(this); }

NewExpressionAST *AST::asNewExpression()
{ return dynamic_cast<NewExpressionAST *>(this); }

NewInitializerAST *AST::asNewInitializer()
{ return dynamic_cast<NewInitializerAST *>(this); }

NewTypeIdAST *AST::asNewTypeId()
{ return dynamic_cast<NewTypeIdAST *>(this); }

NumericLiteralAST *AST::asNumericLiteral()
{ return dynamic_cast<NumericLiteralAST *>(this); }

OperatorAST *AST::asOperator()
{ return dynamic_cast<OperatorAST *>(this); }

OperatorFunctionIdAST *AST::asOperatorFunctionId()
{ return dynamic_cast<OperatorFunctionIdAST *>(this); }

ParameterDeclarationAST *AST::asParameterDeclaration()
{ return dynamic_cast<ParameterDeclarationAST *>(this); }

ParameterDeclarationClauseAST *AST::asParameterDeclarationClause()
{ return dynamic_cast<ParameterDeclarationClauseAST *>(this); }

PointerAST *AST::asPointer()
{ return dynamic_cast<PointerAST *>(this); }

PointerToMemberAST *AST::asPointerToMember()
{ return dynamic_cast<PointerToMemberAST *>(this); }

PostIncrDecrAST *AST::asPostIncrDecr()
{ return dynamic_cast<PostIncrDecrAST *>(this); }

PostfixAST *AST::asPostfix()
{ return dynamic_cast<PostfixAST *>(this); }

PostfixDeclaratorAST *AST::asPostfixDeclarator()
{ return dynamic_cast<PostfixDeclaratorAST *>(this); }

PostfixExpressionAST *AST::asPostfixExpression()
{ return dynamic_cast<PostfixExpressionAST *>(this); }

PtrOperatorAST *AST::asPtrOperator()
{ return dynamic_cast<PtrOperatorAST *>(this); }

QualifiedNameAST *AST::asQualifiedName()
{ return dynamic_cast<QualifiedNameAST *>(this); }

ReferenceAST *AST::asReference()
{ return dynamic_cast<ReferenceAST *>(this); }

ReturnStatementAST *AST::asReturnStatement()
{ return dynamic_cast<ReturnStatementAST *>(this); }

SimpleDeclarationAST *AST::asSimpleDeclaration()
{ return dynamic_cast<SimpleDeclarationAST *>(this); }

SimpleNameAST *AST::asSimpleName()
{ return dynamic_cast<SimpleNameAST *>(this); }

SimpleSpecifierAST *AST::asSimpleSpecifier()
{ return dynamic_cast<SimpleSpecifierAST *>(this); }

SizeofExpressionAST *AST::asSizeofExpression()
{ return dynamic_cast<SizeofExpressionAST *>(this); }

SpecifierAST *AST::asSpecifier()
{ return dynamic_cast<SpecifierAST *>(this); }

StatementAST *AST::asStatement()
{ return dynamic_cast<StatementAST *>(this); }

StringLiteralAST *AST::asStringLiteral()
{ return dynamic_cast<StringLiteralAST *>(this); }

SwitchStatementAST *AST::asSwitchStatement()
{ return dynamic_cast<SwitchStatementAST *>(this); }

TemplateArgumentListAST *AST::asTemplateArgumentList()
{ return dynamic_cast<TemplateArgumentListAST *>(this); }

TemplateDeclarationAST *AST::asTemplateDeclaration()
{ return dynamic_cast<TemplateDeclarationAST *>(this); }

TemplateIdAST *AST::asTemplateId()
{ return dynamic_cast<TemplateIdAST *>(this); }

TemplateTypeParameterAST *AST::asTemplateTypeParameter()
{ return dynamic_cast<TemplateTypeParameterAST *>(this); }

ThisExpressionAST *AST::asThisExpression()
{ return dynamic_cast<ThisExpressionAST *>(this); }

ThrowExpressionAST *AST::asThrowExpression()
{ return dynamic_cast<ThrowExpressionAST *>(this); }

TranslationUnitAST *AST::asTranslationUnit()
{ return dynamic_cast<TranslationUnitAST *>(this); }

TryBlockStatementAST *AST::asTryBlockStatement()
{ return dynamic_cast<TryBlockStatementAST *>(this); }

TypeConstructorCallAST *AST::asTypeConstructorCall()
{ return dynamic_cast<TypeConstructorCallAST *>(this); }

TypeIdAST *AST::asTypeId()
{ return dynamic_cast<TypeIdAST *>(this); }

TypeidExpressionAST *AST::asTypeidExpression()
{ return dynamic_cast<TypeidExpressionAST *>(this); }

TypenameCallExpressionAST *AST::asTypenameCallExpression()
{ return dynamic_cast<TypenameCallExpressionAST *>(this); }

TypenameTypeParameterAST *AST::asTypenameTypeParameter()
{ return dynamic_cast<TypenameTypeParameterAST *>(this); }

TypeofSpecifierAST *AST::asTypeofSpecifier()
{ return dynamic_cast<TypeofSpecifierAST *>(this); }

UnaryExpressionAST *AST::asUnaryExpression()
{ return dynamic_cast<UnaryExpressionAST *>(this); }

UsingAST *AST::asUsing()
{ return dynamic_cast<UsingAST *>(this); }

UsingDirectiveAST *AST::asUsingDirective()
{ return dynamic_cast<UsingDirectiveAST *>(this); }

WhileStatementAST *AST::asWhileStatement()
{ return dynamic_cast<WhileStatementAST *>(this); }

void AST::accept(ASTVisitor *visitor)
{
    if (visitor->preVisit(this))
        accept0(visitor);
    visitor->postVisit(this);
}

unsigned AttributeSpecifierAST::firstToken() const
{
    return attribute_token;
}

unsigned AttributeSpecifierAST::lastToken() const
{
    if (second_rparen_token)
        return second_rparen_token + 1;
    else if (first_rparen_token)
        return first_rparen_token + 1;
    else if (attributes)
        return attributes->lastToken();
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    else if (second_lparen_token)
        return second_lparen_token + 1;
    else if (first_lparen_token)
        return first_lparen_token + 1;
    return attribute_token + 1;
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}

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AttributeSpecifierAST *AttributeSpecifierAST::clone(MemoryPool *pool) const
{
    AttributeSpecifierAST *ast = new (pool) AttributeSpecifierAST;
    ast->attribute_token = attribute_token;
    ast->first_lparen_token = first_lparen_token;
    ast->second_lparen_token = second_lparen_token;
    if (attributes)
        ast->attributes = attributes->clone(pool);
    ast->first_rparen_token = first_rparen_token;
    ast->second_rparen_token = second_rparen_token;
    return ast;
}

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void AttributeSpecifierAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        for (AttributeAST *attr = attributes; attr; attr = attr->next)
            accept(attr, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned AttributeAST::firstToken() const
{
    return identifier_token;
}

unsigned AttributeAST::lastToken() const
{
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    if (rparen_token)
        return rparen_token + 1;

    for (ExpressionListAST *it = expression_list;
            it->expression && it->next; it = it->next) {
        if (! it->next && it->expression) {
            return it->expression->lastToken();
        }
    }

    if (tag_token)
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        return tag_token + 1;
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    if (lparen_token)
        return lparen_token + 1;

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    return identifier_token + 1;
}

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AttributeAST *AttributeAST::clone(MemoryPool *pool) const
{
    AttributeAST *ast = new (pool) AttributeAST;
    ast->identifier_token = identifier_token;
    ast->lparen_token = lparen_token;
    ast->tag_token = tag_token;
    if (expression_list)
        ast->expression_list = expression_list->clone(pool);
    ast->rparen_token = rparen_token;
    if (next)
        ast->next = next->clone(pool);
    return ast;
}

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void AttributeAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        for (ExpressionListAST *it = expression_list; it; it = it->next)
            accept(it->expression, visitor);
    }
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    visitor->endVisit(this);
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}

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AccessDeclarationAST *AccessDeclarationAST::clone(MemoryPool *pool) const
{
    AccessDeclarationAST *ast = new (pool) AccessDeclarationAST;
    ast->access_specifier_token = access_specifier_token;
    ast->slots_token = slots_token;
    ast->colon_token = colon_token;
    return ast;
}

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void AccessDeclarationAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
    }
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    visitor->endVisit(this);
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}

unsigned AccessDeclarationAST::firstToken() const
{
    return access_specifier_token;
}

unsigned AccessDeclarationAST::lastToken() const
{
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    if (colon_token)
        return colon_token + 1;
    else if (slots_token)
        return slots_token + 1;
    return access_specifier_token + 1;
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}

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ArrayAccessAST *ArrayAccessAST::clone(MemoryPool *pool) const
{
    ArrayAccessAST *ast = new (pool) ArrayAccessAST;
    ast->lbracket_token = lbracket_token;
    if (expression)
        ast->expression = expression->clone(pool);
    ast->rbracket_token = rbracket_token;
    return ast;
}

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void ArrayAccessAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        accept(expression, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned ArrayAccessAST::firstToken() const
{
    return lbracket_token;
}

unsigned ArrayAccessAST::lastToken() const
{
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    if (rbracket_token)
        return rbracket_token + 1;
    else if (expression)
        return expression->lastToken();
    return lbracket_token + 1;
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}

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ArrayDeclaratorAST *ArrayDeclaratorAST::clone(MemoryPool *pool) const
{
    ArrayDeclaratorAST *ast = new (pool) ArrayDeclaratorAST;
    ast->lbracket_token = lbracket_token;
    if (expression)
        ast->expression = expression->clone(pool);
    ast->rbracket_token = rbracket_token;
    return ast;
}

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void ArrayDeclaratorAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        accept(this->expression, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned ArrayDeclaratorAST::firstToken() const
{
    return lbracket_token;
}

unsigned ArrayDeclaratorAST::lastToken() const
{
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    if (rbracket_token)
        return rbracket_token + 1;
    else if (expression)
        return expression->lastToken();
    return lbracket_token + 1;
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}

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ArrayInitializerAST *ArrayInitializerAST::clone(MemoryPool *pool) const
{
    ArrayInitializerAST *ast = new (pool) ArrayInitializerAST;
    ast->lbrace_token = lbrace_token;
    if (expression_list)
        ast->expression_list = expression_list->clone(pool);
    ast->rbrace_token = rbrace_token;
    return ast;
}

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void ArrayInitializerAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
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        for (ExpressionListAST *expr = expression_list; expr; expr = expr->next)
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            accept(expr->expression, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned ArrayInitializerAST::firstToken() const
{
    return lbrace_token;
}

unsigned ArrayInitializerAST::lastToken() const
{
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    if (rbrace_token)
        return rbrace_token + 1;

    for (ExpressionListAST *it = expression_list; it; it = it->next) {
        if (! it->next && it->expression)
            return it->expression->lastToken();
    }

    return lbrace_token + 1;
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}

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AsmDefinitionAST *AsmDefinitionAST::clone(MemoryPool *pool) const
{
    AsmDefinitionAST *ast = new (pool) AsmDefinitionAST;
    ast->asm_token = asm_token;
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    ast->volatile_token = volatile_token;
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    ast->lparen_token = lparen_token;
    ast->rparen_token = rparen_token;
    ast->semicolon_token = semicolon_token;
    return ast;
}

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void AsmDefinitionAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
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        // ### accept the asm operand list.
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    }
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    visitor->endVisit(this);
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}

unsigned AsmDefinitionAST::firstToken() const
{
    return asm_token;
}

unsigned AsmDefinitionAST::lastToken() const
{
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    if (semicolon_token)
        return semicolon_token + 1;
    else if (rparen_token)
        return rparen_token + 1;
    else if (lparen_token)
        return lparen_token + 1;
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    else if (volatile_token)
        return volatile_token + 1;
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    return asm_token + 1;
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}

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BaseSpecifierAST *BaseSpecifierAST::clone(MemoryPool *pool) const
{
    BaseSpecifierAST *ast = new (pool) BaseSpecifierAST;
    ast->token_virtual = token_virtual;
    ast->token_access_specifier = token_access_specifier;
    if (name)
        ast->name = name->clone(pool);
    if (next)
        ast->next = next->clone(pool);
    return ast;
}

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void BaseSpecifierAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        accept(name, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned BaseSpecifierAST::firstToken() const
{
    if (token_virtual && token_access_specifier)
        return std::min(token_virtual, token_access_specifier);
    return name->firstToken();
}

unsigned BaseSpecifierAST::lastToken() const
{
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    if (name)
        return name->lastToken();
    else if (token_virtual && token_access_specifier)
        return std::min(token_virtual, token_access_specifier) + 1;
    else if (token_virtual)
        return token_virtual + 1;
    else if (token_access_specifier)
        return token_access_specifier + 1;
    // assert?
    return 0;
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}

unsigned QtMethodAST::firstToken() const
{ return method_token; }

unsigned QtMethodAST::lastToken() const
{
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    if (rparen_token)
        return rparen_token + 1;
    else if (declarator)
        return declarator->lastToken();
    else if (lparen_token)
        return lparen_token + 1;
    return method_token + 1;
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}

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QtMethodAST *QtMethodAST::clone(MemoryPool *pool) const
{
    QtMethodAST *ast = new (pool) QtMethodAST;
    ast->method_token = method_token;
    ast->lparen_token = lparen_token;
    if (declarator)
        ast->declarator = declarator->clone(pool);
    ast->rparen_token = rparen_token;
    return ast;
}

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void QtMethodAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        accept(declarator, visitor);
    }
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    visitor->endVisit(this);
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}

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BinaryExpressionAST *BinaryExpressionAST::clone(MemoryPool *pool) const
{
    BinaryExpressionAST *ast = new (pool) BinaryExpressionAST;
    if (left_expression)
        ast->left_expression = left_expression->clone(pool);
    ast->binary_op_token = binary_op_token;
    if (right_expression)
        ast->right_expression = right_expression->clone(pool);
    return ast;
}

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void BinaryExpressionAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        accept(left_expression, visitor);
        accept(right_expression, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned BinaryExpressionAST::firstToken() const
{
    return left_expression->firstToken();
}

unsigned BinaryExpressionAST::lastToken() const
{
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    if (right_expression)
        return right_expression->lastToken();
    else if (binary_op_token)
        return binary_op_token + 1;
    return left_expression->lastToken();
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}

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BoolLiteralAST *BoolLiteralAST::clone(MemoryPool *pool) const
{
    BoolLiteralAST *ast = new (pool) BoolLiteralAST;
    ast->token = token;
    return ast;
}

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void BoolLiteralAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
    }
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    visitor->endVisit(this);
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}

unsigned BoolLiteralAST::firstToken() const
{
    return token;
}

unsigned BoolLiteralAST::lastToken() const
{
    return token + 1;
}

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CompoundLiteralAST *CompoundLiteralAST::clone(MemoryPool *pool) const
{
    CompoundLiteralAST *ast = new (pool) CompoundLiteralAST;
    ast->lparen_token = lparen_token;
    if (type_id)
        ast->type_id = type_id->clone(pool);
    ast->rparen_token = rparen_token;
    if (initializer)
        ast->initializer = initializer->clone(pool);
    return ast;
}

void CompoundLiteralAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        accept(type_id, visitor);
        accept(initializer, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned CompoundLiteralAST::firstToken() const
{
    return lparen_token;
}

unsigned CompoundLiteralAST::lastToken() const
{
    if (initializer)
        return initializer->lastToken();
    else if (rparen_token)
        return rparen_token + 1;
    else if (type_id)
        return type_id->lastToken();
    return lparen_token + 1;
}

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BreakStatementAST *BreakStatementAST::clone(MemoryPool *pool) const
{
    BreakStatementAST *ast = new (pool) BreakStatementAST;
    ast->break_token = break_token;
    ast->semicolon_token = semicolon_token;
    return ast;
}

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void BreakStatementAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
    }
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    visitor->endVisit(this);
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}

unsigned BreakStatementAST::firstToken() const
{
    return break_token;
}

unsigned BreakStatementAST::lastToken() const
{
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    if (semicolon_token)
        return semicolon_token + 1;
    return break_token + 1;
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}

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CallAST *CallAST::clone(MemoryPool *pool) const
{
    CallAST *ast = new (pool) CallAST;
    ast->lparen_token = lparen_token;
    if (expression_list)
        ast->expression_list = expression_list;
    ast->rparen_token = rparen_token;
    return ast;
}

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void CallAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        for (ExpressionListAST *expr = expression_list;
                 expr; expr = expr->next)
            accept(expr->expression, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned CallAST::firstToken() const
{
    return lparen_token;
}

unsigned CallAST::lastToken() const
{
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    if (rparen_token)
        return rparen_token + 1;
    for (ExpressionListAST *it = expression_list; it; it = it->next) {
        if (! it->next && it->expression)
            return it->expression->lastToken();
    }
    return lparen_token + 1;
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}

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CaseStatementAST *CaseStatementAST::clone(MemoryPool *pool) const
{
    CaseStatementAST *ast = new (pool) CaseStatementAST;
    ast->case_token = case_token;
    if (expression)
        ast->expression = expression->clone(pool);
    ast->colon_token = colon_token;
    if (statement)
        ast->statement = statement->clone(pool);
    return ast;
}

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void CaseStatementAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
    }
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    visitor->endVisit(this);
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}

unsigned CaseStatementAST::firstToken() const
{
    return case_token;
}

unsigned CaseStatementAST::lastToken() const
{
    if (statement)
        return statement->lastToken();
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    else if (colon_token)
        return colon_token + 1;
    else if (expression)
        return expression->lastToken();
    return case_token + 1;
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}

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CastExpressionAST *CastExpressionAST::clone(MemoryPool *pool) const
{
    CastExpressionAST *ast = new (pool) CastExpressionAST;
    ast->lparen_token = lparen_token;
    if (type_id)
        ast->type_id = type_id->clone(pool);
    ast->rparen_token = rparen_token;
    if (expression)
        ast->expression = expression->clone(pool);
    return ast;
}

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void CastExpressionAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
    }
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    visitor->endVisit(this);
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}

unsigned CastExpressionAST::firstToken() const
{
    return lparen_token;
}

unsigned CastExpressionAST::lastToken() const
{
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    if (expression)
        return expression->lastToken();
    else if (rparen_token)
        return rparen_token + 1;
    else if (type_id)
        return type_id->lastToken();
    return lparen_token + 1;
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}

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CatchClauseAST *CatchClauseAST::clone(MemoryPool *pool) const
{
    CatchClauseAST *ast = new (pool) CatchClauseAST;
    ast->catch_token = catch_token;
    ast->lparen_token = lparen_token;
    if (exception_declaration)
        ast->exception_declaration = exception_declaration->clone(pool);
    ast->rparen_token = rparen_token;
    if (statement)
        ast->statement = statement->clone(pool);
    if (next)
        ast->next = next->clone(pool);
    return ast;
}

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void CatchClauseAST::accept0(ASTVisitor *visitor)
{
    if (visitor->visit(this)) {
        accept(exception_declaration, visitor);
        accept(statement, visitor);
    }
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    visitor->endVisit(this);
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}

unsigned CatchClauseAST::firstToken() const
{
    return catch_token;
}

unsigned CatchClauseAST::lastToken() const
{
    if (statement)
        return statement->lastToken();
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    else if (rparen_token)
        return rparen_token + 1;
    for (DeclarationAST *it = exception_declaration; it; it = it->next) {
        if (! it->next)
            return it->lastToken();
    }
    if (lparen_token)
        return lparen_token + 1;

    return catch_token + 1;
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}

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ClassSpecifierAST *ClassSpecifierAST::clone(MemoryPool *pool) const