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refactor: sudo_cast improved to benefit from treat_as_floating_point

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Mateusz Pusz
2023-06-13 09:12:04 +03:00
parent 8a124ffbf0
commit 211bd61895
1 changed files with 3 additions and 15 deletions
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18
src/core/include/mp-units/bits/sudo_cast.h
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@ -42,18 +42,6 @@ template<Quantity From, Quantity To>
return typename From::rep{};
}
// determines the value type used by the representation type
template<typename Rep>
[[nodiscard]] consteval auto rep_value_type(Rep)
{
if constexpr (requires { typename Rep::value_type; })
return typename Rep::value_type{};
else if constexpr (requires { typename Rep::element_type; })
return typename Rep::element_type{};
else
return Rep{};
}
/**
* @brief Explicit cast between different quantity types
*
@ -84,10 +72,10 @@ template<Quantity To, typename From>
constexpr Magnitude auto num = numerator(c_mag);
constexpr Magnitude auto den = denominator(c_mag);
constexpr Magnitude auto irr = c_mag * (den / num);
using c_mag_type = common_magnitude_type<c_mag>;
using c_rep_type = decltype(common_rep_type(q, To{}));
using v_type = decltype(rep_value_type(c_rep_type{}));
using multiplier_type = decltype(v_type{} * c_mag_type{});
using c_mag_type = common_magnitude_type<c_mag>;
using multiplier_type =
conditional<treat_as_floating_point<c_rep_type>, std::common_type_t<c_mag_type, long double>, c_mag_type>;
constexpr auto val = [](Magnitude auto m) { return get_value<multiplier_type>(m); };
return static_cast<TYPENAME To::rep>(static_cast<c_rep_type>(std::forward<From>(q).number()) * val(num) / val(den) *
val(irr)) *