forked from mpusz/mp-units
88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
// The MIT License (MIT)
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//
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// Copyright (c) 2018 Mateusz Pusz
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#pragma once
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#include <units/base_dimension.h>
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#include <units/ratio.h>
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namespace units {
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/**
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* @brief A power of factor corresponding to the dimension of a quantity
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*
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* @tparam Dim component dimension of a derived quantity
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* @tparam Num numinator of the factor
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* @tparam Den denominator of the factor
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*/
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template<Dimension Dim, std::intmax_t Num, std::intmax_t Den = 1>
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struct exp {
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using dimension = Dim;
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static constexpr int num = Num;
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static constexpr int den = Den;
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};
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// is_exp
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namespace detail {
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template<typename Dim, std::intmax_t Num, std::intmax_t Den>
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inline constexpr bool is_exp<exp<Dim, Num, Den>> = true;
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} // namespace detail
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// exp_less
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template<Exponent E1, Exponent E2>
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requires BaseDimension<typename E1::dimension> && BaseDimension<typename E2::dimension>
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struct exp_less : base_dimension_less<typename E1::dimension, typename E2::dimension> {};
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// exp_invert
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namespace detail {
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template<typename Dim, std::intmax_t Num, std::intmax_t Den>
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constexpr exp<Dim, -Num, Den> exp_invert_impl(exp<Dim, Num, Den>);
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} // namespace detail
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template<Exponent E>
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using exp_invert = decltype(detail::exp_invert_impl(E()));
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// exp_multiply
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namespace detail {
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template<Exponent E, std::intmax_t Num, std::intmax_t Den>
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struct exp_multiply_impl {
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using r1 = ratio<E::num, E::den>;
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using r2 = ratio<Num, Den>;
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using r = ratio_multiply<r1, r2>;
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using type = exp<typename E::dimension, r::num, r::den>;
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};
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} // namespace detail
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template<Exponent E, std::intmax_t Num, std::intmax_t Den>
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using exp_multiply = detail::exp_multiply_impl<E, Num, Den>::type;
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template<Exponent... Es>
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struct exp_list {};
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} // namespace units
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