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-rw-r--r--libcxx/include/__memory/ranges_construct_at.h124
1 files changed, 124 insertions, 0 deletions
diff --git a/libcxx/include/__memory/ranges_construct_at.h b/libcxx/include/__memory/ranges_construct_at.h
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+++ b/libcxx/include/__memory/ranges_construct_at.h
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+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___MEMORY_RANGES_CONSTRUCT_AT_H
+#define _LIBCPP___MEMORY_RANGES_CONSTRUCT_AT_H
+
+#include <__concepts/destructible.h>
+#include <__config>
+#include <__iterator/incrementable_traits.h>
+#include <__iterator/readable_traits.h>
+#include <__memory/concepts.h>
+#include <__memory/construct_at.h>
+#include <__ranges/access.h>
+#include <__ranges/concepts.h>
+#include <__ranges/dangling.h>
+#include <__utility/declval.h>
+#include <__utility/forward.h>
+#include <__utility/move.h>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#pragma GCC system_header
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+#if !defined(_LIBCPP_HAS_NO_RANGES)
+namespace ranges {
+
+// construct_at
+
+namespace __construct_at {
+
+struct __fn {
+ template<class _Tp, class... _Args, class = decltype(
+ ::new (declval<void*>()) _Tp(declval<_Args>()...)
+ )>
+ _LIBCPP_HIDE_FROM_ABI
+ constexpr _Tp* operator()(_Tp* __location, _Args&& ...__args) const {
+ return _VSTD::construct_at(__location, _VSTD::forward<_Args>(__args)...);
+ }
+};
+
+} // namespace __construct_at
+
+inline namespace __cpo {
+ inline constexpr auto construct_at = __construct_at::__fn{};
+} // namespace __cpo
+
+// destroy_at
+
+namespace __destroy_at {
+
+struct __fn {
+ template <destructible _Tp>
+ _LIBCPP_HIDE_FROM_ABI
+ constexpr void operator()(_Tp* __location) const noexcept {
+ _VSTD::destroy_at(__location);
+ }
+};
+
+} // namespace __destroy_at
+
+inline namespace __cpo {
+ inline constexpr auto destroy_at = __destroy_at::__fn{};
+} // namespace __cpo
+
+// destroy
+
+namespace __destroy {
+
+struct __fn {
+ template <__nothrow_input_iterator _InputIterator, __nothrow_sentinel_for<_InputIterator> _Sentinel>
+ requires destructible<iter_value_t<_InputIterator>>
+ _LIBCPP_HIDE_FROM_ABI
+ constexpr _InputIterator operator()(_InputIterator __first, _Sentinel __last) const noexcept {
+ return _VSTD::__destroy(_VSTD::move(__first), _VSTD::move(__last));
+ }
+
+ template <__nothrow_input_range _InputRange>
+ requires destructible<range_value_t<_InputRange>>
+ _LIBCPP_HIDE_FROM_ABI
+ constexpr borrowed_iterator_t<_InputRange> operator()(_InputRange&& __range) const noexcept {
+ return (*this)(ranges::begin(__range), ranges::end(__range));
+ }
+};
+
+} // namespace __destroy
+
+inline namespace __cpo {
+ inline constexpr auto destroy = __destroy::__fn{};
+} // namespace __cpo
+
+// destroy_n
+
+namespace __destroy_n {
+
+struct __fn {
+ template <__nothrow_input_iterator _InputIterator>
+ requires destructible<iter_value_t<_InputIterator>>
+ _LIBCPP_HIDE_FROM_ABI
+ constexpr _InputIterator operator()(_InputIterator __first, iter_difference_t<_InputIterator> __n) const noexcept {
+ return _VSTD::destroy_n(_VSTD::move(__first), __n);
+ }
+};
+
+} // namespace __destroy_n
+
+inline namespace __cpo {
+ inline constexpr auto destroy_n = __destroy_n::__fn{};
+} // namespace __cpo
+
+} // namespace ranges
+
+#endif // !defined(_LIBCPP_HAS_NO_RANGES)
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // _LIBCPP___MEMORY_RANGES_CONSTRUCT_AT_H