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copy.hpp
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1
2// Range v3 library
3//
4// Copyright Eric Niebler 2013-present
5//
6// Use, modification and distribution is subject to the
7// Boost Software License, Version 1.0. (See accompanying
8// file LICENSE_1_0.txt or copy at
9// http://www.boost.org/LICENSE_1_0.txt)
10//
11// Project home: https://github.com/ericniebler/range-v3
12//
13
14#ifndef RANGES_V3_UTILITY_COPY_HPP
15#define RANGES_V3_UTILITY_COPY_HPP
16
17#include <concepts/concepts.hpp>
18
20
21#include <range/v3/utility/static_const.hpp>
22
23#include <range/v3/detail/prologue.hpp>
24
25namespace ranges
26{
29 namespace aux
30 {
32 {
33 template(typename T)(
34 requires constructible_from<detail::decay_t<T>, T>)
35 constexpr auto operator()(T && t) const -> detail::decay_t<T>
36 {
37 return static_cast<T &&>(t);
38 }
39
42 template<typename T>
43 friend constexpr auto operator|(T && t, copy_fn)
44 -> CPP_broken_friend_ret(detail::decay_t<T>)(
45 requires constructible_from<detail::decay_t<T>, T>)
46 {
47 return static_cast<T &&>(t);
48 }
49 };
50
53 RANGES_INLINE_VARIABLE(copy_fn, copy)
54 } // namespace aux
56} // namespace ranges
57
58#include <range/v3/detail/epilogue.hpp>
59
60#endif
friend constexpr auto operator|(T &&t, copy_fn) -> CPP_broken_friend_ret(detail::decay_t< T >)()
Definition copy.hpp:43
Definition copy.hpp:32
Definition copy.hpp:71
Definition range_fwd.hpp:492