/////////////////////////////////////////////////////////////////////////////////
//
//  Copyright (C) 2017-     Statoil ASA
// 
//  ResInsight is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
// 
//  ResInsight is distributed in the hope that it will be useful, but WITHOUT ANY
//  WARRANTY; without even the implied warranty of MERCHANTABILITY or
//  FITNESS FOR A PARTICULAR PURPOSE.
// 
//  See the GNU General Public License at <http://www.gnu.org/licenses/gpl.html> 
//  for more details.
//
/////////////////////////////////////////////////////////////////////////////////

#pragma once

#include <QString>

#include <memory>
#include <vector>

class ExpressionParserImpl;

//==================================================================================================
/// 
//==================================================================================================
class ExpressionParser
{
public:
    ExpressionParser();
    ~ExpressionParser();

    static std::vector<QString> detectReferencedVariables(const QString& expression);

    void                        assignVector(const QString& variableName, std::vector<double>& vector);
    bool                        evaluate(const QString& expressionText, QString* errorText = nullptr);
    bool                        expandIfStatementsAndEvaluate(const QString& expressionText, QString* errorText = nullptr);

private:
    std::unique_ptr<ExpressionParserImpl> m_expressionParserImpl;
};