Custom ratio type implemented

2019-05-28 16:17:48 +02:00
parent 7bcc5c7b0b
commit 9c0f2c6878
11 changed files with 205 additions and 176 deletions
@@ -1,87 +0,0 @@
-// The MIT License (MIT)
-//
-// Copyright (c) 2018 Mateusz Pusz
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-
-#pragma once
-
-#include <ratio>
-#include <type_traits>
-
-namespace units {
-
-  // static_sign
-
-  template<std::intmax_t Pn>
-  struct static_sign : std::integral_constant<std::intmax_t, (Pn < 0) ? -1 : 1> {
-  };
-
-  // static_abs
-
-  template<std::intmax_t Pn>
-  struct static_abs : std::integral_constant<std::intmax_t, Pn * static_sign<Pn>::value> {
-  };
-
-  // static_gcd
-
-  template<std::intmax_t Pn, std::intmax_t Qn>
-  struct static_gcd : static_gcd<Qn, (Pn % Qn)> {
-  };
-
-  template<std::intmax_t Pn>
-  struct static_gcd<Pn, 0> : std::integral_constant<std::intmax_t, static_abs<Pn>::value> {
-  };
-
-  template<std::intmax_t Qn>
-  struct static_gcd<0, Qn> : std::integral_constant<std::intmax_t, static_abs<Qn>::value> {
-  };
-
-  // is_ratio
-
-  namespace detail {
-
-    template<typename T>
-    inline constexpr bool is_ratio = false;
-
-    template<intmax_t Num, intmax_t Den>
-    inline constexpr bool is_ratio<std::ratio<Num, Den>> = true;
-
-  }  // namespace detail
-
-  template<typename T>
-  concept bool Ratio = detail::is_ratio<T>;
-
-  // common_ratio
-  namespace detail {
-
-    // todo: simplified
-    template<typename R1, typename R2>
-    struct common_ratio_impl {
-      using gcd_num = static_gcd<R1::num, R2::num>;
-      using gcd_den = static_gcd<R1::den, R2::den>;
-      using type = std::ratio<gcd_num::value, (R1::den / gcd_den::value) * R2::den>;
-    };
-
-  }
-
-  template<Ratio R1, Ratio R2>
-  using common_ratio = detail::common_ratio_impl<R1, R2>::type;
-
-}  // namespace units