forked from mpusz/mp-units
53 lines
2.3 KiB
C
53 lines
2.3 KiB
C
|
// 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 "validated_type.h"
|
||
|
|
#include <algorithm>
|
||
|
|
#include <type_traits>
|
||
|
|
|
||
|
|
template<auto Min, auto Max>
|
||
|
|
inline constexpr auto is_in_range = [](const auto& v) { return std::clamp(v, Min, Max) == v; };
|
||
|
|
|
||
|
|
template<typename T, T Min, T Max>
|
||
|
|
class ranged_representation : public validated_type<T, decltype(is_in_range<Min, Max>)> {
|
||
|
|
public:
|
||
|
|
using base = validated_type<T, decltype(is_in_range<Min, Max>)>;
|
||
|
|
using base::validated_type;
|
||
|
|
constexpr ranged_representation() : base(T{}) {}
|
||
|
|
|
||
|
|
[[nodiscard]] constexpr ranged_representation operator-() const { return ranged_representation(-this->value()); }
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename T, T Min, T Max>
|
||
|
|
struct std::common_type<std::intmax_t, ranged_representation<T, Min, Max>> :
|
||
|
|
std::type_identity<
|
||
|
|
ranged_representation<std::common_type_t<std::intmax_t, T>, std::common_type_t<std::intmax_t, T>{Min},
|
||
|
|
std::common_type_t<std::intmax_t, T>{Max}>> {};
|
||
|
|
|
||
|
|
template<typename T, T Min, T Max>
|
||
|
|
struct std::common_type<ranged_representation<T, Min, Max>, std::intmax_t> :
|
||
|
|
std::type_identity<
|
||
|
|
ranged_representation<std::common_type_t<T, std::intmax_t>, std::common_type_t<T, std::intmax_t>{Min},
|
||
|
|
std::common_type_t<T, std::intmax_t>{Max}>> {};
|