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xo-unit: multiply, volatility units, share operators

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Roland Conybeare 2024-05-01 23:04:14 -04:00
commit eb63f5fdc8
6 changed files with 212 additions and 47 deletions
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include/xo/unit/quantity_ops.hpp Normal file
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/** @file quantity_ops.hpp
*
* Author: Roland Conybeare
**/
#pragma once
#include "quantity2_concept.hpp"
//#include <cstdint>
namespace xo {
namespace qty {
/** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
**/
template <typename Quantity, typename Quantity2>
requires quantity2_concept<Quantity> && quantity2_concept<Quantity2>
constexpr auto
operator* (const Quantity & x, const Quantity2 & y)
{
return Quantity::multiply(x, y);
}
/** note: does not require unit scaling, so constexpr with c++23 **/
template <typename Dimensionless, typename Quantity>
requires std::is_arithmetic_v<Dimensionless> && quantity2_concept<Quantity>
constexpr auto
operator* (Dimensionless x, const Quantity & y)
{
return y.scale_by(x);
}
/** note: does not require unit scaling, so constexpr with c++23 **/
template <typename Dimensionless, typename Quantity>
requires std::is_arithmetic_v<Dimensionless> && quantity2_concept<Quantity>
constexpr auto
operator* (const Quantity & x, Dimensionless y)
{
return x.scale_by(y);
}
/** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
**/
template <typename Quantity, typename Quantity2>
requires quantity2_concept<Quantity> && quantity2_concept<Quantity2>
constexpr auto
operator== (const Quantity & x, const Quantity2 & y)
{
return (Quantity::compare(x, y) == 0);
}
} /*namespace qty*/
} /*namespace xo*/
/** end quantity_ops.hpp **/