afb81b8278
Some checks failed
Docker. / Ubuntu (push) Has been cancelled
User-agent updater. / User-agent (push) Failing after 15s
Lock Threads / lock (push) Failing after 10s
Waiting for answer. / waiting-for-answer (push) Failing after 22s
Needs user action. / needs-user-action (push) Failing after 8s
Can't reproduce. / cant-reproduce (push) Failing after 8s
Close stale issues and PRs / stale (push) Has been cancelled
61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
/// \file
|
|
// Range v3 library
|
|
//
|
|
// Copyright Eric Niebler 2013-present
|
|
//
|
|
// Use, modification and distribution is subject to the
|
|
// Boost Software License, Version 1.0. (See accompanying
|
|
// file LICENSE_1_0.txt or copy at
|
|
// http://www.boost.org/LICENSE_1_0.txt)
|
|
//
|
|
// Project home: https://github.com/ericniebler/range-v3
|
|
//
|
|
|
|
#ifndef RANGES_V3_UTILITY_COPY_HPP
|
|
#define RANGES_V3_UTILITY_COPY_HPP
|
|
|
|
#include <concepts/concepts.hpp>
|
|
|
|
#include <range/v3/range_fwd.hpp>
|
|
|
|
#include <range/v3/utility/static_const.hpp>
|
|
|
|
#include <range/v3/detail/prologue.hpp>
|
|
|
|
namespace ranges
|
|
{
|
|
/// \addtogroup group-utility
|
|
/// @{
|
|
namespace aux
|
|
{
|
|
struct copy_fn : copy_tag
|
|
{
|
|
template(typename T)(
|
|
requires constructible_from<detail::decay_t<T>, T>)
|
|
constexpr auto operator()(T && t) const -> detail::decay_t<T>
|
|
{
|
|
return static_cast<T &&>(t);
|
|
}
|
|
|
|
/// \ingroup group-utility
|
|
/// \sa `copy_fn`
|
|
template<typename T>
|
|
friend constexpr auto operator|(T && t, copy_fn)
|
|
-> CPP_broken_friend_ret(detail::decay_t<T>)(
|
|
requires constructible_from<detail::decay_t<T>, T>)
|
|
{
|
|
return static_cast<T &&>(t);
|
|
}
|
|
};
|
|
|
|
/// \ingroup group-utility
|
|
/// \sa `copy_fn`
|
|
RANGES_INLINE_VARIABLE(copy_fn, copy)
|
|
} // namespace aux
|
|
/// @}
|
|
} // namespace ranges
|
|
|
|
#include <range/v3/detail/epilogue.hpp>
|
|
|
|
#endif
|