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113 lines
2.5 KiB
C++
113 lines
2.5 KiB
C++
/// \file
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// Range v3 library
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//
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// Copyright Eric Niebler 2013-present
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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#ifndef RANGES_V3_FUNCTIONAL_ARITHMETIC_HPP
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#define RANGES_V3_FUNCTIONAL_ARITHMETIC_HPP
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#include <concepts/concepts.hpp>
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#include <range/v3/detail/prologue.hpp>
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namespace ranges
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{
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/// \addtogroup group-functional
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/// @{
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struct plus
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{
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template<typename T, typename U>
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constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t + (U &&) u)
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{
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return (T &&) t + (U &&) u;
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}
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using is_transparent = void;
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};
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struct minus
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{
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template<typename T, typename U>
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constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t - (U &&) u)
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{
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return (T &&) t - (U &&) u;
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}
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using is_transparent = void;
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};
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struct multiplies
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{
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template<typename T, typename U>
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constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t * (U &&) u)
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{
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return (T &&) t * (U &&) u;
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}
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using is_transparent = void;
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};
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struct bitwise_or
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{
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template<typename T, typename U>
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constexpr auto operator()(T && t, U && u) const -> decltype((T &&) t | (U &&) u)
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{
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return (T &&) t | (U &&) u;
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}
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using is_transparent = void;
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};
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template<typename T>
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struct convert_to
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{
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// clang-format off
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template<typename U>
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constexpr auto CPP_auto_fun(operator())(U &&u)(const)
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(
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return static_cast<T>((U &&) u)
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)
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// clang-format on
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};
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template<typename T>
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struct coerce
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{
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constexpr T & operator()(T & t) const
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{
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return t;
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}
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/// \overload
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constexpr T const & operator()(T const & t) const
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{
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return t;
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}
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/// \overload
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constexpr T operator()(T && t) const
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{
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return (T &&) t;
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}
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T operator()(T const &&) const = delete;
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};
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template<typename T>
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struct coerce<T const> : coerce<T>
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{};
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template<typename T>
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struct coerce<T &> : coerce<T>
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{};
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template<typename T>
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struct coerce<T &&> : coerce<T>
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{};
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/// @}
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} // namespace ranges
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#include <range/v3/detail/epilogue.hpp>
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#endif
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