rppexpressionbuilder.h

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the qt3to4 porting application of the Qt Toolkit.
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** and appearing in the file LICENSE.GPL included in the packaging of
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#ifndef RPPEXPRESSIONBUILDER_H
#define RPPEXPRESSIONBUILDER_H

#include "tokens.h"
#include "tokenengine.h"
#include "smallobject.h"
#include "rpp.h"
#include <QByteArray>

namespace Rpp {

class ExpressionBuilder
{
public:
    ExpressionBuilder(const TokenEngine::TokenList &tokenList, const QVector<Type> &typeList, TypedPool<Item> *memoryPool);
    Rpp::Expression *parse();
private:

    inline bool hasNext() const { return (i < m_tokenList.count()); }
    Type next();
    bool test(int);
    bool moreTokens(int delta);
    inline void prev() {--i;}
    Type lookup(int k = 1);
    inline Type token() { return typeAt(i-1);}
    inline QByteArray lexem() { return m_tokenList.text(i-1);}
    inline Type typeAt(int t) { return m_typeList.at(m_tokenList.containerIndex(t));}

    Expression *conditional_expression();
    Expression *logical_OR_expression();
    Expression *logical_AND_expression();
    Expression *inclusive_OR_expression();
    Expression *exclusive_OR_expression();
    Expression *AND_expression();
    Expression *equality_expression();
    Expression *relational_expression();
    Expression *shift_expression();
    Expression *additive_expression();
    Expression *multiplicative_expression();
    Expression *unary_expression();
    Expression *primary_expression();

    bool unary_expression_lookup();
    bool primary_expression_lookup();

    UnaryExpression *createUnaryExpression(int op, Expression *expression);
    BinaryExpression *createBinaryExpression(int op, Expression *leftExpresson, Expression *rightExpression);
    ConditionalExpression *createConditionalExpression(Expression *condition, Expression *leftExpression, Expression *rightExpression);
    MacroReference *createMacroReference(MacroReference::Type type, TokenEngine::TokenList token);
    IntLiteral *createIntLiteral(const int arg);

    TokenEngine::TokenList createTokenList(int tokenIndex) const;

    int i;
    TokenEngine::TokenList m_tokenList;
    QVector<Type> m_typeList;
    TypedPool<Item> *m_memoryPool;
};

}

#endif