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NTTP ratio support added (resolves #49)

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Mateusz Pusz committed 2020-06-27 19:15:46 +02:00
1 parent 03facbefd2
commit d171f5451e
47 files changed
+504 -664
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src/include/units/bits/deduced_unit.h
+14 -30
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@@ -34,39 +34,23 @@ template<typename... Es, Unit... Us>
inline constexpr bool same_scaled_units<exp_list<Es...>, Us...> = (UnitOf<Us, typename Es::dimension> && ...);
// deduced_unit
template<typename Result, int UnitExpNum, int UnitExpDen, typename UnitRatio>
struct ratio_op;
template<typename Result, int UnitExpDen, typename UnitRatio>
struct ratio_op<Result, 0, UnitExpDen, UnitRatio> {
using ratio = Result;
};
template<Exponent E>
constexpr ratio inverse_if_negative(const ratio& r)
{
if constexpr(E::num * E::den > 0)
return r;
else
return inverse(r);
}
template<typename Result, int UnitExpNum, int UnitExpDen, typename UnitRatio>
struct ratio_op {
using calc_ratio =
conditional<(UnitExpNum * UnitExpDen > 0), ratio_multiply<Result, UnitRatio>, ratio_divide<Result, UnitRatio>>;
static constexpr int value = (UnitExpNum * UnitExpDen > 0) ? (UnitExpNum - UnitExpDen) : (UnitExpNum + UnitExpDen);
using ratio = ratio_op<calc_ratio, value, UnitExpDen, UnitRatio>::ratio;
};
template<typename ExpList, Unit... Us>
struct derived_ratio;
template<Unit... Us>
struct derived_ratio<exp_list<>, Us...> {
using ratio = ::units::ratio<1>;
};
template<typename E, typename... ERest, Unit U, Unit... URest>
struct derived_ratio<exp_list<E, ERest...>, U, URest...> {
using rest_ratio = derived_ratio<exp_list<ERest...>, URest...>::ratio;
using unit_ratio = ratio_op<rest_ratio, E::num, E::den, typename U::ratio>::ratio;
using ratio = ratio_divide<unit_ratio, typename dimension_unit<typename E::dimension>::ratio>;
};
template<Unit... Us, typename... Es>
constexpr ratio derived_ratio(exp_list<Es...>)
{
return (... * inverse_if_negative<Es>(pow<detail::abs(Es::num)>(Us::ratio) / dimension_unit<typename Es::dimension>::ratio));
}
template<DerivedDimension D, Unit... Us>
using deduced_unit =
scaled_unit<typename detail::derived_ratio<typename D::recipe, Us...>::ratio, typename D::coherent_unit::reference>;
using deduced_unit = scaled_unit<derived_ratio<Us...>(typename D::recipe()), typename D::coherent_unit::reference>;
} // namespace units::detail