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72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
// Range v3 library
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//
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// Copyright Eric Niebler 2014-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_UTILITY_INFINITY_HPP
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#define RANGES_V3_UTILITY_INFINITY_HPP
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#include <concepts/concepts.hpp>
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#include <range/v3/range_fwd.hpp>
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RANGES_DEPRECATED_HEADER(
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"This header is deprecated and will be removed from a future version of range-v3.")
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#include <range/v3/detail/prologue.hpp>
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namespace ranges
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{
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/// \cond
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struct infinity
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{
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friend constexpr bool operator==(infinity, infinity)
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{
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return true;
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}
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friend constexpr bool operator!=(infinity, infinity)
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{
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return false;
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}
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template<typename Integer>
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friend constexpr auto operator==(Integer, infinity) noexcept
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-> CPP_broken_friend_ret(bool)(
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requires integral<Integer>)
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{
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return false;
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}
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template<typename Integer>
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friend constexpr auto operator==(infinity, Integer) noexcept
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-> CPP_broken_friend_ret(bool)(
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requires integral<Integer>)
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{
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return false;
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}
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template<typename Integer>
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friend constexpr auto operator!=(Integer, infinity) noexcept
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-> CPP_broken_friend_ret(bool)(
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requires integral<Integer>)
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{
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return true;
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}
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template<typename Integer>
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friend constexpr auto operator!=(infinity, Integer) noexcept
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-> CPP_broken_friend_ret(bool)(
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requires integral<Integer>)
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{
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return true;
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}
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};
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/// \endcond
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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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