Source code: C++ Volume Conversion Class đź› 

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C++ source code for performing volume conversions auto-magically.

Header:

//
// volume_types.h
// Version timestamp: 10-25-2018, 7:19 PM
//
// Attribution : Copyright (c) 2018 Northern_Loki (sha256::6F290BF833967127BE26C92C8F6B1C1A3949C55A7EABCEF3ECC785CD2D38D30D)
// License is granted under the Creative Commons Attribution-ShareAlike 4.0 International.  https://creativecommons.org/licenses/by-sa/4.0/
//

# pragma once

# include <string>
# include <sstream>
# include <boost/variant.hpp>
# include <iostream>

# include "Constants.h"


/***********************************************************************/
/*                                                                     */
/*                    Conversion Template                              */
/*                                                                     */
/***********************************************************************/
template <class T> class Volume_Convert; 
class tcubic_meter_variant; class tcubic_yard_variant; class tfluid_dram_variant; class tUS_fluid_ounce_variant; class tUK_fluid_ounce_variant; class tUS_fluid_gallon_variant; class tUK_fluid_gallon_variant;
class tliter_variant; class tdry_pint_variant; class tdry_quart_variant; class tbarrel_variant; class tUS_bushel_variant; class tUK_bushel_variant; class tpeck_variant;
typedef Volume_Convert<tcubic_meter_variant> cubic_meter;
typedef Volume_Convert<tcubic_yard_variant> cubic_yard;
typedef Volume_Convert<tfluid_dram_variant> fluid_dram;
typedef Volume_Convert<tUS_fluid_ounce_variant> US_fluid_ounce;
typedef Volume_Convert<tUK_fluid_ounce_variant> UK_fluid_ounce;
typedef Volume_Convert<tUS_fluid_gallon_variant> US_fluid_gallon;
typedef Volume_Convert<tUK_fluid_gallon_variant> UK_fluid_gallon;
typedef Volume_Convert<tliter_variant> liter;
typedef Volume_Convert<tdry_pint_variant> dry_pint;
typedef Volume_Convert<tdry_quart_variant> dry_quart;
typedef Volume_Convert<tbarrel_variant> barrel;
typedef Volume_Convert<tUS_bushel_variant> US_bushel;
typedef Volume_Convert<tUK_bushel_variant> UK_bushel;
typedef Volume_Convert<tpeck_variant> peck;

typedef boost::variant<cubic_meter, cubic_yard, fluid_dram, US_fluid_ounce, UK_fluid_ounce, US_fluid_gallon, 
    UK_fluid_gallon, liter, dry_pint, dry_quart, barrel, US_bushel, UK_bushel, peck, double> volume_variant;

template <class T> 
    class Volume_Convert 
    { 
    private: 
        
    public: 
        double volume = 0.0;
        Volume_Convert(); 
        Volume_Convert(double r) { this->volume = r; }
        Volume_Convert(const volume_variant &c)
        {
            this->volume = boost::apply_visitor(T(), c); 
        }
        void operator=(double c)
        {
            this->volume = c;
        }
        void operator=(volume_variant c)
        {
            this->volume = boost::apply_visitor(T(), c); 
        }
        virtual double operator()() {return (this->volume);}
        virtual double operator()(volume_variant temp2) {return (boost::apply_visitor(T(), temp2));}
        virtual double operator-(volume_variant temp2){return (this->volume - boost::apply_visitor(T(), temp2));}
        virtual double operator+(volume_variant temp2){return (this->volume + boost::apply_visitor(T(), temp2));}
        virtual double operator*(volume_variant temp2){return (this->volume * boost::apply_visitor(T(), temp2));}
        virtual double operator/(volume_variant temp2){return (this->volume / boost::apply_visitor(T(), temp2));}
        virtual double operator-=(volume_variant temp2){this->volume -= boost::apply_visitor(T(), temp2); return (this->volume);}
        virtual double operator+=(volume_variant temp2){this->volume += boost::apply_visitor(T(), temp2); return (this->volume);}
        virtual double operator*=(volume_variant temp2){this->volume *= boost::apply_visitor(T(), temp2); return (this->volume);}
        virtual double operator/=(volume_variant temp2){this->volume /= boost::apply_visitor(T(), temp2); return (this->volume);}
        virtual double operator>(volume_variant temp2){if (this->volume > boost::apply_visitor(T(), temp2)) return (1);return (0);} 
        virtual double operator<(volume_variant temp2){if (this->volume < boost::apply_visitor(T(), temp2)) return (1);return (0);}
        virtual double operator>=(volume_variant temp2){if (this->volume >= boost::apply_visitor(T(), temp2)) return (1);return (0);} 
        virtual double operator<=(volume_variant temp2){if (this->volume <= boost::apply_visitor(T(), temp2)) return (1);return (0);} 
        virtual double operator==(volume_variant temp2){if (this->volume == boost::apply_visitor(T(), temp2)) return (1);return (0);} 
        friend std::ostream& operator<<(std::ostream& lhs, const Volume_Convert& rhs)
        {
            return (lhs << rhs.volume);
        }
    }; 


/***********************************************************************/
/*                                                                     */
/*                      cubic_meter Conversion                         */
/*                                                                     */
/***********************************************************************/
class tcubic_meter_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(cubic_meter c) const { return (c.volume); }
    double operator()(cubic_yard c) const { double temp = c.volume * 0.764554857984; return (temp); } 
    double operator()(fluid_dram c) const { double temp = c.volume * 0.000003696691195313; return (temp);}
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.0000295735295625; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.0000284130625; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 0.003785411784; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 0.00454609; return (temp); }
    double operator()(liter c) const { double temp = c.volume * 0.001; return (temp); }   
    double operator()(dry_pint c) const{ double temp = c.volume * 0.0005506104713575; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 0.001101220942715; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 0.158987294928; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 0.03523907016688; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 0.03636872; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 0.00880976754172; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                      cubic_yard Conversion                          */
/*                                                                     */
/***********************************************************************/
class tcubic_yard_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(cubic_yard c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 1.307950619314; return (temp); } 
    double operator()(fluid_dram c) const { double temp = c.volume * 0.000004835089538323; return (temp);}
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.00003868071630658; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.00003716288269349; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 0.004951131687243; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 0.005946061230959; return (temp); }
    double operator()(liter c) const { double temp = c.volume * 0.001307950619314; return (temp); } 
    double operator()(dry_pint c) const{ double temp = c.volume * 0.000720171307013; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 0.001440342614026; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 0.2079475308642; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 0.04609096364883; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 0.04756848984767; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 0.01152274091221; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                      fluid_dram Conversion                          */
/*                                                                     */
/***********************************************************************/
class tfluid_dram_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(fluid_dram c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 270512.1816147; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 206821.4025974; return (temp);}
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 8.0; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 7.686079523231; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 1024.0; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 1229.772723717; return (temp); }
    double operator()(liter c) const { double temp = c.volume * 270.5121816147; return (temp); } 
    double operator()(dry_pint c) const{ double temp = c.volume * 148.9468398268; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 297.8936796537; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 43008.0; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 9532.597748918; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 9838.181789736; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 2383.149437229; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                      US_fluid_ounce Conversion                      */
/*                                                                     */
/***********************************************************************/
class tUS_fluid_ounce_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(US_fluid_ounce c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 33814.02270184; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 25852.67532468; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.125; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.9607599404039; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 128.0; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 153.7215904646; return (temp); }
    double operator()(liter c) const { double temp = c.volume * 33.81402270184; return (temp); } 
    double operator()(dry_pint c) const{ double temp = c.volume * 18.61835497836; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 37.23670995671; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 5376.0; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 1191.574718615; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 1229.772723717; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 297.8936796537; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                      UK_fluid_ounce Conversion                      */
/*                                                                     */
/***********************************************************************/
class tUK_fluid_ounce_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(UK_fluid_ounce c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 35195.07972785; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 26908.56918306; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.1301053413483; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 1.040842730786; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 133.2278695406; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 160.0; return (temp); }
    double operator()(liter c) const { double temp = c.volume * 35.19507972785; return (temp); } 
    double operator()(dry_pint c) const{ double temp = c.volume * 19.37877943842; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 38.75755887684; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 5595.570520707; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 1240.241884059; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 1280.0; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 310.0604710147; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                     US_fluid_gallon Conversion                      */
/*                                                                     */
/***********************************************************************/
class tUS_fluid_gallon_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(US_fluid_gallon c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 264.1720523581; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 201.974025974; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.0009765625; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.0078125; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.007505937034405; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 1.200949925505; return (temp); }
    double operator()(liter c) const { double temp = c.volume * 0.2641720523582; return (temp); } 
    double operator()(dry_pint c) const{ double temp = c.volume * 0.1454558982684; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 0.2909117965368; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 42.0; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 9.309177489177; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 9.607599404039; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 2.327294372294; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                     UK_fluid_gallon Conversion                      */
/*                                                                     */
/***********************************************************************/
class tUK_fluid_gallon_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(UK_fluid_gallon c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 219.9692482991; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 168.1785573942; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.0008131583834268; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.006505267067414; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.00625; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 0.832674184629; return (temp); }
    double operator()(liter c) const { double temp = c.volume * 0.2199692482991; return (temp); } 
    double operator()(dry_pint c) const{ double temp = c.volume * 0.1211173714901; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 0.2422347429802; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 34.97231575442; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 7.751511775367; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 8.0; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 1.937877943842; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                        liter Conversion                             */
/*                                                                     */
/***********************************************************************/
class tliter_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(liter c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 1000.0; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 764.554857984; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.003696691195313; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.0295735295625; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.0284130625; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 3.785411784; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 4.54609; return (temp); } 
    double operator()(dry_pint c) const{ double temp = c.volume * 0.5506104713575; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 1.101220942715; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 158.987294928; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 35.23907016688; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 36.36872; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 8.80976754172; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                        Dry pint Conversion                          */
/*                                                                     */
/***********************************************************************/
class tdry_pint_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(dry_pint c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 1816.165968538; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 1388.558514151; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.00671380474512; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.05371043796096; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.05160283717443; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 6.874936059002; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 8.256453947909; return (temp); } 
    double operator()(liter c) const{ double temp = c.volume * 1.816165968538; return (temp); }  
    double operator()(dry_quart c) const{ double temp = c.volume * 2.0; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 288.7473144781; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 64.0; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 66.05163158328; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 16.0; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                        Dry quart Conversion                         */
/*                                                                     */
/***********************************************************************/
class tdry_quart_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(dry_quart c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 908.0829842689; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 694.2792570754; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.00335690237256; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.02685521898048; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.02580141858722; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 3.437468029501; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 4.128226973955; return (temp); } 
    double operator()(liter c) const{ double temp = c.volume * 0.9080829842689; return (temp); }  
    double operator()(dry_pint c) const{ double temp = c.volume * 0.5; return (temp); } 
    double operator()(barrel c) const{ double temp = c.volume * 144.3736572391; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 32.0; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 33.02581579164; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 8.0; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                          Barrel Conversion                          */
/*                                                                     */
/***********************************************************************/
class tbarrel_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(barrel c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 6.289810770432; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 4.808905380334; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.00002325148809524; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.0001860119047619; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.0001787127865335; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 0.02380952380952; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 0.02859404584535; return (temp); } 
    double operator()(liter c) const{ double temp = c.volume * 0.006289810770432; return (temp); }  
    double operator()(dry_pint c) const{ double temp = c.volume * 0.003463235673057; return (temp); } 
    double operator()(dry_quart c) const{ double temp = c.volume * 0.006926471346114; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 0.2216470830757; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 0.2287523667628; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 0.05541177076891; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                        US Bushel Conversion                         */
/*                                                                     */
/***********************************************************************/
class tUS_bushel_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(US_bushel c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 28.3775932584; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 21.69622678361; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.0001049031991425; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.00083922559314; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.0008062943308506; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 0.1074208759219; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 0.1290070929361; return (temp); } 
    double operator()(liter c) const{ double temp = c.volume * 0.0283775932584; return (temp); }  
    double operator()(dry_pint c) const{ double temp = c.volume * 0.015625; return (temp); } 
    double operator()(dry_quart c) const{ double temp = c.volume * 0.03125; return (temp); }
    double operator()(barrel c) const { double temp = c.volume * 4.51167678872; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 1.032056743489; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 0.25; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                        UK Bushel Conversion                         */
/*                                                                     */
/***********************************************************************/
class tUK_bushel_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(UK_bushel c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 27.49615603739; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 21.02231967427; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.0001016447979283; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.0008131583834267; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.00078125; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 0.1040842730786; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 0.125; return (temp); } 
    double operator()(liter c) const{ double temp = c.volume * 0.02749615603739; return (temp); }  
    double operator()(dry_pint c) const{ double temp = c.volume * 0.01513967143626; return (temp); } 
    double operator()(dry_quart c) const{ double temp = c.volume * 0.03027934287253; return (temp); }
    double operator()(barrel c) const { double temp = c.volume * 4.371539469302; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 0.9689389719209; return (temp); }
    double operator()(peck c) const { double temp = c.volume * 0.2422347429802; return (temp); }
};

/***********************************************************************/
/*                                                                     */
/*                           Peck Conversion                           */
/*                                                                     */
/***********************************************************************/
class tpeck_variant : public boost::static_visitor<double>
{
public:
    double operator()(double c) const { return (c); }
    double operator()(peck c) const { return (c.volume); }
    double operator()(cubic_meter c) const { double temp = c.volume * 113.5103730336; return (temp); } 
    double operator()(cubic_yard c) const { double temp = c.volume * 86.78490713442; return (temp);}
    double operator()(fluid_dram c) const { double temp = c.volume * 0.00041961279657; return (temp); }
    double operator()(US_fluid_ounce c) const { double temp = c.volume * 0.00335690237256; return (temp); }
    double operator()(UK_fluid_ounce c) const { double temp = c.volume * 0.003225177323402; return (temp); }
    double operator()(US_fluid_gallon c) const { double temp = c.volume * 0.4296835036877; return (temp); }
    double operator()(UK_fluid_gallon c) const { double temp = c.volume * 0.5160283717444; return (temp); } 
    double operator()(liter c) const{ double temp = c.volume * 0.1135103730336; return (temp); }  
    double operator()(dry_pint c) const{ double temp = c.volume * 0.0625; return (temp); } 
    double operator()(dry_quart c) const{ double temp = c.volume * 0.125; return (temp); }
    double operator()(barrel c) const { double temp = c.volume * 18.04670715488; return (temp); }
    double operator()(US_bushel c) const { double temp = c.volume * 4.0; return (temp); }
    double operator()(UK_bushel c) const { double temp = c.volume * 4.128226973955; return (temp); }
};

CC BY-SA 4.0

2

This above class is for the DIY types that have some software background. Questions/comment/suggestions are great but I’d like to ask forum members to avoid the “what’s this good for” type questions within this thread to avoid clutter. You’ll either know what this is or you won’t (yet).

Current conversion types in this class include cubic_meter, cubic_yard, fluid_dram, US_fluid_ounce, UK_fluid_ounce, US_fluid_gallon, UK_fluid_gallon, liter, dry_pint, dry_quart, barrel, US_bushel, UK_bushel, peck. This class handles conversion auto-magically including performance of math on disparate units.

This is an on-going project with several associated threads with differing objectives. Additional source, documentation, etc can be found by clicking on the “sourcecode” tag.

The conversion classes have been updated to utilize c++ templates to reduce the source file size and eliminate the cpp file. The only disadvantage is that it’s more difficult to comprehend and assignments between units using “=” requires a type cast to the destination unit (because I couldn’t figure out a clean way to automate the type case magically using templates).

Usage example:

	cubic_meter this_m3 = 3.5;
	cubic_yard this_yd3(this_m3);
	fluid_dram this_dram = (fluid_dram) this_yd3;
	US_fluid_ounce this_usoz(this_dram);
	UK_fluid_ounce this_ukoz(this_usoz);
	US_fluid_gallon this_usgal = (US_fluid_gallon) this_ukoz;
	UK_fluid_gallon this_ukgal = (UK_fluid_gallon) this_usgal;
	liter this_liter(this_usgal);
	dry_pint this_pint(this_liter);
	dry_quart this_quart(this_pint);
	barrel this_barrel(this_quart);
	US_bushel this_US_bushel(this_barrel);
	UK_bushel this_UK_bushel(this_US_bushel);
	peck this_peck(this_UK_bushel);
	
	std::cout << "cubic_meter: " << this_m3 << std::endl;
	std::cout << "cubic_yard: " << this_yd3 << std::endl;
	std::cout << "fluid_dram: " << this_dram << std::endl;
	std::cout << "US_fluid_ounce: " << this_usoz << std::endl;
	std::cout << "UK_fluid_ounce: " << this_ukoz << std::endl;
	std::cout << "US_fluid_gallon: " << this_usgal << std::endl;
	std::cout << "UK_fluid_gallon: " << this_ukgal << std::endl;
	std::cout << "liter: " << this_liter << std::endl;
	std::cout << "dry_pint: " << this_pint << std::endl;
	std::cout << "dry_quart: " << this_quart << std::endl;
	std::cout << "barrel: " << this_barrel << std::endl;
	std::cout << "US_bushel: " << this_US_bushel << std::endl;
	std::cout << "UK_bushel: " << this_UK_bushel << std::endl;
	std::cout << "peck: " << this_peck << std::endl;	
	
        /* Some math */
	liter added_volumes = 0.0;
	added_volumes += this_m3;
	added_volumes += this_yd3;
	added_volumes += this_dram;
	added_volumes += this_usoz;
	added_volumes += this_usoz;
	added_volumes += this_ukoz;
	added_volumes += this_usgal;
	added_volumes += this_ukgal;
	added_volumes += this_liter;
	added_volumes += this_pint;
	added_volumes -= this_quart;
	added_volumes *= this_barrel;
	added_volumes /= (barrel)(this_barrel*2.0);
	added_volumes += this_peck;
	
	/* Should be ~= 19.25 m^3 */
	std::cout << "Total volume (m^3): " << (cubic_meter)added_volumes << std::endl;

Produces:

cubic_meter: 3.5
cubic_yard: 4.57783
fluid_dram: 946793
US_fluid_ounce: 118349
UK_fluid_ounce: 123183
US_fluid_gallon: 924.602
UK_fluid_gallon: 769.892
liter: 3500
dry_pint: 6356.58
dry_quart: 3178.29
barrel: 22.0143
US_bushel: 99.3216
UK_bushel: 96.2365
peck: 397.286
Total volume (m^3): 19.25
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