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49 lines
1.0 KiB
C++
49 lines
1.0 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_IDENTITY_HPP
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#define RANGES_V3_FUNCTIONAL_IDENTITY_HPP
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#include <range/v3/detail/config.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 identity
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{
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template<typename T>
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constexpr T && operator()(T && t) const noexcept
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{
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return (T &&) t;
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}
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using is_transparent = void;
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};
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/// \cond
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using ident RANGES_DEPRECATED("Replace uses of ranges::ident with ranges::identity") =
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identity;
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/// \endcond
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namespace cpp20
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{
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using ranges::identity;
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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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