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Overconstrained quantity operations relaxed

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Mateusz Pusz committed 2020-03-25 15:04:33 +01:00
1 parent 2a5baff160
commit ab1cc4b8e7
6 files changed
+167 -95
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src/include/units/quantity_cast.h
+2 -4
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@@ -163,11 +163,10 @@ struct cast_ratio<FromD, FromU, ToD, ToU> {
*/
template<Quantity To, typename D, typename U, typename Rep>
[[nodiscard]] constexpr auto quantity_cast(const quantity<D, U, Rep>& q)
requires QuantityOf<To, D> &&
detail::basic_arithmetic<std::common_type_t<typename To::rep, Rep, intmax_t>>
requires QuantityOf<To, D>
{
using c_ratio = detail::cast_ratio<D, U, typename To::dimension, typename To::unit>::type;
using c_rep = std::common_type_t<typename To::rep, Rep, intmax_t>;
using c_rep = std::common_type_t<typename To::rep, Rep>;
using ret_unit = downcast_unit<typename To::dimension, typename To::unit::ratio>;
using ret = quantity<typename To::dimension, ret_unit, typename To::rep>;
using cast = detail::quantity_cast_impl<ret, c_ratio, c_rep, c_ratio::num == 1 && c_ratio::exp == 0, c_ratio::den == 1 && c_ratio::exp == 0>;
@@ -226,7 +225,6 @@ template<Unit ToU, typename D, typename U, typename Rep>
*/
template<Scalar ToRep, typename D, typename U, typename Rep>
[[nodiscard]] constexpr auto quantity_cast(const quantity<D, U, Rep>& q)
requires detail::basic_arithmetic<std::common_type_t<ToRep, Rep, intmax_t>>
{
return quantity_cast<quantity<D, U, ToRep>>(q);
}