/*
 * LateBindingValue.hpp
 *
 *  Created on: 28 сент. 2020 г.
 *      Author: LeonidTitov
 */

#ifndef UMLIBRARY_SCHEMATIC_LATEBINDINGVALUE_HPP_
#define UMLIBRARY_SCHEMATIC_LATEBINDINGVALUE_HPP_

#include "../systemic/IValue.hpp"

namespace schematic {

template<typename T>
class LateBindingValue : public systemic::IValue<T> {

    T default_value;
    systemic::IValue<T> * binded_value;

public:
    LateBindingValue( T default_value );

    void bind( systemic::IValue<T> * );

    operator T() const;
};

}

template<typename T>
inline schematic::LateBindingValue<T>::LateBindingValue( T default_value ) :
    default_value(default_value), binded_value(nullptr) {}

template<typename T>
inline void schematic::LateBindingValue<T>::bind( systemic::IValue<T> * value ) {

    binded_value = value;

}

template<typename T>
inline schematic::LateBindingValue<T>::operator T() const {

    return binded_value ? *binded_value : default_value;

}

#endif /* UMLIBRARY_SCHEMATIC_LATEBINDINGVALUE_HPP_ */