CachedElement.h

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/*
 * CachedElement.h
 *
 *  Created on: 21 Dec 2013
 *      Author: jowr
 */
 
#ifndef CACHEDELEMENT_H_
#define CACHEDELEMENT_H_
 
#include "CoolPropTools.h"
#include "DataStructures.h"
 
namespace CoolProp {
 
class CachedElement
{
 
   private:
    bool is_cached;
    CoolPropDbl value;
 
   public:
    CachedElement() {
        this->clear();
    };
 
    void _do_cache(double value) {
        this->value = value;
        this->is_cached = true;
    }
 
    void operator=(const double& value) {
        _do_cache(value);
    };
 
    operator bool() {
        return is_cached;
    };
 
    operator double() {
        if (is_cached) {
            return static_cast<double>(value);
        } else {
            throw std::exception();
        }
    }
#ifndef COOLPROPDBL_MAPS_TO_DOUBLE
    operator CoolPropDbl() {
        if (is_cached) {
            return value;
        } else {
            throw std::exception();
        }
    }
#endif
    void clear() {
        is_cached = false;
        this->value = _HUGE;
    };
    CoolPropDbl& pt() {
        return this->value;
    }
};
 
} /* namespace CoolProp */
#endif /* CACHEDELEMENT_H_ */