1// -*- C++ -*-
 2//===----------------------------------------------------------------------===//
 3//
 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 5// See https://llvm.org/LICENSE.txt for license information.
 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 7//
 8//===----------------------------------------------------------------------===//
 9
10#ifndef _LIBCPP___MEMORY_RANGES_DESTROY_H
11#define _LIBCPP___MEMORY_RANGES_DESTROY_H
12
13#include <__concepts/destructible.h>
14#include <__config>
15#include <__iterator/incrementable_traits.h>
16#include <__iterator/iterator_traits.h>
17#include <__memory/concepts.h>
18#include <__memory/destroy.h>
19#include <__ranges/access.h>
20#include <__ranges/concepts.h>
21#include <__ranges/dangling.h>
22#include <__utility/move.h>
23
24#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
25#  pragma GCC system_header
26#endif
27
28_LIBCPP_PUSH_MACROS
29#include <__undef_macros>
30
31_LIBCPP_BEGIN_NAMESPACE_STD
32
33#if _LIBCPP_STD_VER >= 20
34namespace ranges {
35
36// destroy
37
38struct __destroy {
39  template <__nothrow_input_iterator _InputIterator, __nothrow_sentinel_for<_InputIterator> _Sentinel>
40    requires destructible<iter_value_t<_InputIterator>>
41  _LIBCPP_HIDE_FROM_ABI constexpr _InputIterator operator()(_InputIterator __first, _Sentinel __last) const noexcept {
42    return std::__destroy(std::move(__first), std::move(__last));
43  }
44
45  template <__nothrow_input_range _InputRange>
46    requires destructible<range_value_t<_InputRange>>
47  _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_InputRange> operator()(_InputRange&& __range) const noexcept {
48    return (*this)(ranges::begin(__range), ranges::end(__range));
49  }
50};
51
52inline namespace __cpo {
53inline constexpr auto destroy = __destroy{};
54} // namespace __cpo
55
56// destroy_n
57
58struct __destroy_n {
59  template <__nothrow_input_iterator _InputIterator>
60    requires destructible<iter_value_t<_InputIterator>>
61  _LIBCPP_HIDE_FROM_ABI constexpr _InputIterator
62  operator()(_InputIterator __first, iter_difference_t<_InputIterator> __n) const noexcept {
63    return std::destroy_n(std::move(__first), __n);
64  }
65};
66
67inline namespace __cpo {
68inline constexpr auto destroy_n = __destroy_n{};
69} // namespace __cpo
70
71} // namespace ranges
72
73#endif // _LIBCPP_STD_VER >= 20
74
75_LIBCPP_END_NAMESPACE_STD
76
77_LIBCPP_POP_MACROS
78
79#endif // _LIBCPP___MEMORY_RANGES_DESTROY_H