Gecko [ v99win.today ]

Name	Size	Permission
algorithmfwd.h	23.97 KB	-rw-r--r--
align.h	3.62 KB	-rw-r--r--
alloc_traits.h	26.98 KB	-rw-r--r--
allocated_ptr.h	3.25 KB	-rw-r--r--
allocator.h	9.51 KB	-rw-r--r--
atomic_base.h	56.07 KB	-rw-r--r--
atomic_futex.h	12.1 KB	-rw-r--r--
atomic_lockfree_defines.h	2.3 KB	-rw-r--r--
atomic_timed_wait.h	13.21 KB	-rw-r--r--
atomic_wait.h	12.26 KB	-rw-r--r--
basic_ios.h	15.7 KB	-rw-r--r--
basic_ios.tcc	5.94 KB	-rw-r--r--
basic_string.h	246.04 KB	-rw-r--r--
basic_string.tcc	52.92 KB	-rw-r--r--
boost_concept_check.h	26.54 KB	-rw-r--r--
c++0x_warning.h	1.44 KB	-rw-r--r--
char_traits.h	28.66 KB	-rw-r--r--
charconv.h	3.35 KB	-rw-r--r--
codecvt.h	24.9 KB	-rw-r--r--
concept_check.h	3.34 KB	-rw-r--r--
cpp_type_traits.h	13.67 KB	-rw-r--r--
cxxabi_forced.h	1.77 KB	-rw-r--r--
cxxabi_init_exception.h	2.17 KB	-rw-r--r--
deque.tcc	41.37 KB	-rw-r--r--
enable_special_members.h	12.16 KB	-rw-r--r--
erase_if.h	2.02 KB	-rw-r--r--
exception.h	2.45 KB	-rw-r--r--
exception_defines.h	1.61 KB	-rw-r--r--
exception_ptr.h	7.46 KB	-rw-r--r--
forward_list.h	49.21 KB	-rw-r--r--
forward_list.tcc	13.71 KB	-rw-r--r--
fs_dir.h	16.02 KB	-rw-r--r--
fs_fwd.h	10.52 KB	-rw-r--r--
fs_ops.h	10.49 KB	-rw-r--r--
fs_path.h	38.81 KB	-rw-r--r--
fstream.tcc	32.88 KB	-rw-r--r--
functexcept.h	3.43 KB	-rw-r--r--
functional_hash.h	8.39 KB	-rw-r--r--
gslice.h	5.39 KB	-rw-r--r--
gslice_array.h	7.71 KB	-rw-r--r--
hash_bytes.h	2.1 KB	-rw-r--r--
hashtable.h	82.96 KB	-rw-r--r--
hashtable_policy.h	60.7 KB	-rw-r--r--
indirect_array.h	7.72 KB	-rw-r--r--
invoke.h	5.92 KB	-rw-r--r--
ios_base.h	31.19 KB	-rw-r--r--
istream.tcc	30.85 KB	-rw-r--r--
iterator_concepts.h	32.55 KB	-rw-r--r--
list.tcc	16.8 KB	-rw-r--r--
locale_classes.h	24.46 KB	-rw-r--r--
locale_classes.tcc	8.18 KB	-rw-r--r--
locale_conv.h	18.38 KB	-rw-r--r--
locale_facets.h	91.46 KB	-rw-r--r--
locale_facets.tcc	39.51 KB	-rw-r--r--
locale_facets_nonio.h	68.07 KB	-rw-r--r--
locale_facets_nonio.tcc	46.42 KB	-rw-r--r--
localefwd.h	5.8 KB	-rw-r--r--
mask_array.h	7.54 KB	-rw-r--r--
max_size_type.h	22.18 KB	-rw-r--r--
memoryfwd.h	2.45 KB	-rw-r--r--
move.h	6.64 KB	-rw-r--r--
nested_exception.h	4.77 KB	-rw-r--r--
node_handle.h	10.66 KB	-rw-r--r--
ostream.tcc	12.03 KB	-rw-r--r--
ostream_insert.h	3.94 KB	-rw-r--r--
parse_numbers.h	7.79 KB	-rw-r--r--
postypes.h	8.27 KB	-rw-r--r--
predefined_ops.h	9.94 KB	-rw-r--r--
ptr_traits.h	6.55 KB	-rw-r--r--
quoted_string.h	4.93 KB	-rw-r--r--
random.h	174.18 KB	-rw-r--r--
random.tcc	103.21 KB	-rw-r--r--
range_access.h	10.46 KB	-rw-r--r--
ranges_algo.h	114.09 KB	-rw-r--r--
ranges_algobase.h	18.43 KB	-rw-r--r--
ranges_base.h	23.82 KB	-rw-r--r--
ranges_cmp.h	5.88 KB	-rw-r--r--
ranges_uninitialized.h	17.71 KB	-rw-r--r--
ranges_util.h	20.11 KB	-rw-r--r--
refwrap.h	12.9 KB	-rw-r--r--
regex.h	101.53 KB	-rw-r--r--
regex.tcc	16.11 KB	-rw-r--r--
regex_automaton.h	10.54 KB	-rw-r--r--
regex_automaton.tcc	7.54 KB	-rw-r--r--
regex_compiler.h	15.84 KB	-rw-r--r--
regex_compiler.tcc	18.71 KB	-rw-r--r--
regex_constants.h	15.18 KB	-rw-r--r--
regex_error.h	4.9 KB	-rw-r--r--
regex_executor.h	8.64 KB	-rw-r--r--
regex_executor.tcc	18.4 KB	-rw-r--r--
regex_scanner.h	6.88 KB	-rw-r--r--
regex_scanner.tcc	14.89 KB	-rw-r--r--
semaphore_base.h	7.75 KB	-rw-r--r--
shared_ptr.h	30.25 KB	-rw-r--r--
shared_ptr_atomic.h	9.64 KB	-rw-r--r--
shared_ptr_base.h	53.62 KB	-rw-r--r--
slice_array.h	9.39 KB	-rw-r--r--
specfun.h	46.13 KB	-rw-r--r--
sstream.tcc	9.91 KB	-rw-r--r--
std_abs.h	3.3 KB	-rw-r--r--
std_function.h	22.33 KB	-rw-r--r--
std_mutex.h	6.29 KB	-rw-r--r--
std_thread.h	8.39 KB	-rw-r--r--
stl_algo.h	209.67 KB	-rw-r--r--
stl_algobase.h	74.47 KB	-rw-r--r--
stl_bvector.h	34.74 KB	-rw-r--r--
stl_construct.h	8.59 KB	-rw-r--r--
stl_deque.h	75.17 KB	-rw-r--r--
stl_function.h	42.87 KB	-rw-r--r--
stl_heap.h	20.27 KB	-rw-r--r--
stl_iterator.h	77 KB	-rw-r--r--
stl_iterator_base_funcs.h	7.99 KB	-rw-r--r--
stl_iterator_base_types.h	9.44 KB	-rw-r--r--
stl_list.h	68.14 KB	-rw-r--r--
stl_map.h	53.41 KB	-rw-r--r--
stl_multimap.h	42.51 KB	-rw-r--r--
stl_multiset.h	36.79 KB	-rw-r--r--
stl_numeric.h	14.26 KB	-rw-r--r--
stl_pair.h	19.66 KB	-rw-r--r--
stl_queue.h	24.45 KB	-rw-r--r--
stl_raw_storage_iter.h	3.74 KB	-rw-r--r--
stl_relops.h	4.49 KB	-rw-r--r--
stl_set.h	37.05 KB	-rw-r--r--
stl_stack.h	12.39 KB	-rw-r--r--
stl_tempbuf.h	8.45 KB	-rw-r--r--
stl_tree.h	72.19 KB	-rw-r--r--
stl_uninitialized.h	33.22 KB	-rw-r--r--
stl_vector.h	64.37 KB	-rw-r--r--
stream_iterator.h	7.52 KB	-rw-r--r--
streambuf.tcc	4.81 KB	-rw-r--r--
streambuf_iterator.h	15.17 KB	-rw-r--r--
string_view.tcc	7 KB	-rw-r--r--
stringfwd.h	2.63 KB	-rw-r--r--
this_thread_sleep.h	3.23 KB	-rw-r--r--
uniform_int_dist.h	12.75 KB	-rw-r--r--
unique_lock.h	6 KB	-rw-r--r--
unique_ptr.h	31.77 KB	-rw-r--r--
unordered_map.h	74.87 KB	-rw-r--r--
unordered_set.h	61.46 KB	-rw-r--r--
uses_allocator.h	6.74 KB	-rw-r--r--
uses_allocator_args.h	7.38 KB	-rw-r--r--
valarray_after.h	22.74 KB	-rw-r--r--
valarray_array.h	20.8 KB	-rw-r--r--
valarray_array.tcc	7.08 KB	-rw-r--r--
valarray_before.h	18.69 KB	-rw-r--r--
vector.tcc	30.26 KB	-rw-r--r--

Code Editor : ranges_uninitialized.h

// Raw memory manipulators -*- C++ -*-

// Copyright (C) 2020-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

/** @file bits/ranges_uninitialized.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{memory}
 */

#ifndef _RANGES_UNINITIALIZED_H
#define _RANGES_UNINITIALIZED_H 1

#if __cplusplus > 201703L
#if __cpp_lib_concepts

#include <bits/ranges_algobase.h>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
namespace ranges
{
  namespace __detail
  {
    template<typename _Tp>
      constexpr void*
      __voidify(_Tp& __obj) noexcept
      {
	return const_cast<void*>
		 (static_cast<const volatile void*>(std::__addressof(__obj)));
      }

template<typename _Iter>
      concept __nothrow_input_iterator
	= (input_iterator<_Iter>
	   && is_lvalue_reference_v<iter_reference_t<_Iter>>
	   && same_as<remove_cvref_t<iter_reference_t<_Iter>>,
		      iter_value_t<_Iter>>);

template<typename _Sent, typename _Iter>
      concept __nothrow_sentinel = sentinel_for<_Sent, _Iter>;

template<typename _Range>
      concept __nothrow_input_range
	= (range<_Range>
	   && __nothrow_input_iterator<iterator_t<_Range>>
	   && __nothrow_sentinel<sentinel_t<_Range>, iterator_t<_Range>>);

template<typename _Iter>
      concept __nothrow_forward_iterator
	= (__nothrow_input_iterator<_Iter>
	   && forward_iterator<_Iter>
	   && __nothrow_sentinel<_Iter, _Iter>);

template<typename _Range>
      concept __nothrow_forward_range
	= (__nothrow_input_range<_Range>
	   && __nothrow_forward_iterator<iterator_t<_Range>>);
  } // namespace __detail

struct __destroy_fn
  {
    template<__detail::__nothrow_input_iterator _Iter,
	     __detail::__nothrow_sentinel<_Iter> _Sent>
      requires destructible<iter_value_t<_Iter>>
      constexpr _Iter
      operator()(_Iter __first, _Sent __last) const noexcept;

template<__detail::__nothrow_input_range _Range>
      requires destructible<range_value_t<_Range>>
      constexpr borrowed_iterator_t<_Range>
      operator()(_Range&& __r) const noexcept;
  };

inline constexpr __destroy_fn destroy{};

namespace __detail
  {
    template<typename _Iter>
      requires destructible<iter_value_t<_Iter>>
      struct _DestroyGuard
      {
      private:
	_Iter _M_first;
	const _Iter* _M_cur;

public:
	explicit
	_DestroyGuard(const _Iter& __iter)
	  : _M_first(__iter), _M_cur(std::__addressof(__iter))
	{ }

void
	release() noexcept
	{ _M_cur = nullptr; }

~_DestroyGuard()
	{
	  if (_M_cur != nullptr)
	    ranges::destroy(std::move(_M_first), *_M_cur);
	}
      };

template<typename _Iter>
      requires destructible<iter_value_t<_Iter>>
	&& is_trivially_destructible_v<iter_value_t<_Iter>>
      struct _DestroyGuard<_Iter>
      {
	explicit
	_DestroyGuard(const _Iter&)
	{ }

void
	release() noexcept
	{ }
      };
  } // namespace __detail

struct __uninitialized_default_construct_fn
  {
    template<__detail::__nothrow_forward_iterator _Iter,
	     __detail::__nothrow_sentinel<_Iter> _Sent>
      requires default_initializable<iter_value_t<_Iter>>
      _Iter
      operator()(_Iter __first, _Sent __last) const
      {
	using _ValueType = remove_reference_t<iter_reference_t<_Iter>>;
	if constexpr (is_trivially_default_constructible_v<_ValueType>)
	  return ranges::next(__first, __last);
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__first);
	    for (; __first != __last; ++__first)
	      ::new (__detail::__voidify(*__first)) _ValueType;
	    __guard.release();
	    return __first;
	  }
      }

template<__detail::__nothrow_forward_range _Range>
      requires default_initializable<range_value_t<_Range>>
      borrowed_iterator_t<_Range>
      operator()(_Range&& __r) const
      {
	return (*this)(ranges::begin(__r), ranges::end(__r));
      }
  };

inline constexpr __uninitialized_default_construct_fn
    uninitialized_default_construct{};

struct __uninitialized_default_construct_n_fn
  {
    template<__detail::__nothrow_forward_iterator _Iter>
      requires default_initializable<iter_value_t<_Iter>>
      _Iter
      operator()(_Iter __first, iter_difference_t<_Iter> __n) const
      {
	using _ValueType = remove_reference_t<iter_reference_t<_Iter>>;
	if constexpr (is_trivially_default_constructible_v<_ValueType>)
	  return ranges::next(__first, __n);
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__first);
	    for (; __n > 0; ++__first, (void) --__n)
	      ::new (__detail::__voidify(*__first)) _ValueType;
	    __guard.release();
	    return __first;
	  }
      }
  };

inline constexpr __uninitialized_default_construct_n_fn
    uninitialized_default_construct_n;

struct __uninitialized_value_construct_fn
  {
    template<__detail::__nothrow_forward_iterator _Iter,
	     __detail::__nothrow_sentinel<_Iter> _Sent>
      requires default_initializable<iter_value_t<_Iter>>
      _Iter
      operator()(_Iter __first, _Sent __last) const
      {
	using _ValueType = remove_reference_t<iter_reference_t<_Iter>>;
	if constexpr (is_trivial_v<_ValueType>
		      && is_copy_assignable_v<_ValueType>)
	  return ranges::fill(__first, __last, _ValueType());
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__first);
	    for (; __first != __last; ++__first)
	      ::new (__detail::__voidify(*__first)) _ValueType();
	    __guard.release();
	    return __first;
	  }
      }

inline constexpr __uninitialized_value_construct_fn
    uninitialized_value_construct{};

struct __uninitialized_value_construct_n_fn
  {
    template<__detail::__nothrow_forward_iterator _Iter>
      requires default_initializable<iter_value_t<_Iter>>
      _Iter
      operator()(_Iter __first, iter_difference_t<_Iter> __n) const
      {
	using _ValueType = remove_reference_t<iter_reference_t<_Iter>>;
	if constexpr (is_trivial_v<_ValueType>
		      && is_copy_assignable_v<_ValueType>)
	  return ranges::fill_n(__first, __n, _ValueType());
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__first);
	    for (; __n > 0; ++__first, (void) --__n)
	      ::new (__detail::__voidify(*__first)) _ValueType();
	    __guard.release();
	    return __first;
	  }
      }
  };

inline constexpr __uninitialized_value_construct_n_fn
    uninitialized_value_construct_n;

template<typename _Iter, typename _Out>
    using uninitialized_copy_result = in_out_result<_Iter, _Out>;

struct __uninitialized_copy_fn
  {
    template<input_iterator _Iter, sentinel_for<_Iter> _ISent,
	     __detail::__nothrow_forward_iterator _Out,
	     __detail::__nothrow_sentinel<_Out> _OSent>
      requires constructible_from<iter_value_t<_Out>, iter_reference_t<_Iter>>
      uninitialized_copy_result<_Iter, _Out>
      operator()(_Iter __ifirst, _ISent __ilast,
		 _Out __ofirst, _OSent __olast) const
      {
	using _OutType = remove_reference_t<iter_reference_t<_Out>>;
	if constexpr (sized_sentinel_for<_ISent, _Iter>
		      && sized_sentinel_for<_OSent, _Out>
		      && is_trivial_v<_OutType>
		      && is_nothrow_assignable_v<_OutType&,
						 iter_reference_t<_Iter>>)
	  {
	    auto __d1 = __ilast - __ifirst;
	    auto __d2 = __olast - __ofirst;
	    return ranges::copy_n(std::move(__ifirst), std::min(__d1, __d2),
				  __ofirst);
	  }
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__ofirst);
	    for (; __ifirst != __ilast && __ofirst != __olast;
		 ++__ofirst, (void)++__ifirst)
	      ::new (__detail::__voidify(*__ofirst)) _OutType(*__ifirst);
	    __guard.release();
	    return {std::move(__ifirst), __ofirst};
	  }
      }

template<input_range _IRange, __detail::__nothrow_forward_range _ORange>
      requires constructible_from<range_value_t<_ORange>,
				  range_reference_t<_IRange>>
      uninitialized_copy_result<borrowed_iterator_t<_IRange>,
				borrowed_iterator_t<_ORange>>
      operator()(_IRange&& __inr, _ORange&& __outr) const
      {
	return (*this)(ranges::begin(__inr), ranges::end(__inr),
		       ranges::begin(__outr), ranges::end(__outr));
      }
  };

inline constexpr __uninitialized_copy_fn uninitialized_copy{};

template<typename _Iter, typename _Out>
    using uninitialized_copy_n_result = in_out_result<_Iter, _Out>;

struct __uninitialized_copy_n_fn
  {
    template<input_iterator _Iter, __detail::__nothrow_forward_iterator _Out,
	     __detail::__nothrow_sentinel<_Out> _Sent>
      requires constructible_from<iter_value_t<_Out>, iter_reference_t<_Iter>>
      uninitialized_copy_n_result<_Iter, _Out>
      operator()(_Iter __ifirst, iter_difference_t<_Iter> __n,
		 _Out __ofirst, _Sent __olast) const
      {
	using _OutType = remove_reference_t<iter_reference_t<_Out>>;
	if constexpr (sized_sentinel_for<_Sent, _Out>
		      && is_trivial_v<_OutType>
		      && is_nothrow_assignable_v<_OutType&,
						 iter_reference_t<_Iter>>)
	  {
	    auto __d = __olast - __ofirst;
	    return ranges::copy_n(std::move(__ifirst), std::min(__n, __d),
				  __ofirst);
	  }
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__ofirst);
	    for (; __n > 0 && __ofirst != __olast;
		 ++__ofirst, (void)++__ifirst, (void)--__n)
	      ::new (__detail::__voidify(*__ofirst)) _OutType(*__ifirst);
	    __guard.release();
	    return {std::move(__ifirst), __ofirst};
	  }
      }
  };

inline constexpr __uninitialized_copy_n_fn uninitialized_copy_n{};

template<typename _Iter, typename _Out>
    using uninitialized_move_result = in_out_result<_Iter, _Out>;

struct __uninitialized_move_fn
  {
    template<input_iterator _Iter, sentinel_for<_Iter> _ISent,
	     __detail::__nothrow_forward_iterator _Out,
	     __detail::__nothrow_sentinel<_Out> _OSent>
      requires constructible_from<iter_value_t<_Out>,
				  iter_rvalue_reference_t<_Iter>>
      uninitialized_move_result<_Iter, _Out>
      operator()(_Iter __ifirst, _ISent __ilast,
		 _Out __ofirst, _OSent __olast) const
      {
	using _OutType = remove_reference_t<iter_reference_t<_Out>>;
	if constexpr (sized_sentinel_for<_ISent, _Iter>
		      && sized_sentinel_for<_OSent, _Out>
		      && is_trivial_v<_OutType>
		      && is_nothrow_assignable_v<_OutType&,
						 iter_rvalue_reference_t<_Iter>>)
	  {
	    auto __d1 = __ilast - __ifirst;
	    auto __d2 = __olast - __ofirst;
	    auto [__in, __out]
	      = ranges::copy_n(std::make_move_iterator(std::move(__ifirst)),
			       std::min(__d1, __d2), __ofirst);
	    return {std::move(__in).base(), __out};
	  }
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__ofirst);
	    for (; __ifirst != __ilast && __ofirst != __olast;
		 ++__ofirst, (void)++__ifirst)
	      ::new (__detail::__voidify(*__ofirst))
		    _OutType(ranges::iter_move(__ifirst));
	    __guard.release();
	    return {std::move(__ifirst), __ofirst};
	  }
      }

template<input_range _IRange, __detail::__nothrow_forward_range _ORange>
      requires constructible_from<range_value_t<_ORange>,
	       range_rvalue_reference_t<_IRange>>
      uninitialized_move_result<borrowed_iterator_t<_IRange>,
				borrowed_iterator_t<_ORange>>
      operator()(_IRange&& __inr, _ORange&& __outr) const
      {
	return (*this)(ranges::begin(__inr), ranges::end(__inr),
		       ranges::begin(__outr), ranges::end(__outr));
      }
  };

inline constexpr __uninitialized_move_fn uninitialized_move{};

template<typename _Iter, typename _Out>
    using uninitialized_move_n_result = in_out_result<_Iter, _Out>;

struct __uninitialized_move_n_fn
  {
    template<input_iterator _Iter, __detail::__nothrow_forward_iterator _Out,
      __detail::__nothrow_sentinel<_Out> _Sent>
	requires constructible_from<iter_value_t<_Out>,
				    iter_rvalue_reference_t<_Iter>>
      uninitialized_move_n_result<_Iter, _Out>
      operator()(_Iter __ifirst, iter_difference_t<_Iter> __n,
		 _Out __ofirst, _Sent __olast) const
      {
	using _OutType = remove_reference_t<iter_reference_t<_Out>>;
	if constexpr (sized_sentinel_for<_Sent, _Out>
		      && is_trivial_v<_OutType>
		      && is_nothrow_assignable_v<_OutType&,
						 iter_rvalue_reference_t<_Iter>>)
	  {
	    auto __d = __olast - __ofirst;
	    auto [__in, __out]
	      = ranges::copy_n(std::make_move_iterator(std::move(__ifirst)),
			       std::min(__n, __d), __ofirst);
	    return {std::move(__in).base(), __out};
	  }
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__ofirst);
	    for (; __n > 0 && __ofirst != __olast;
		 ++__ofirst, (void)++__ifirst, (void)--__n)
	      ::new (__detail::__voidify(*__ofirst))
		    _OutType(ranges::iter_move(__ifirst));
	    __guard.release();
	    return {std::move(__ifirst), __ofirst};
	  }
      }
  };

inline constexpr __uninitialized_move_n_fn uninitialized_move_n{};

struct __uninitialized_fill_fn
  {
    template<__detail::__nothrow_forward_iterator _Iter,
	     __detail::__nothrow_sentinel<_Iter> _Sent, typename _Tp>
      requires constructible_from<iter_value_t<_Iter>, const _Tp&>
      _Iter
      operator()(_Iter __first, _Sent __last, const _Tp& __x) const
      {
	using _ValueType = remove_reference_t<iter_reference_t<_Iter>>;
	if constexpr (is_trivial_v<_ValueType>
		      && is_nothrow_assignable_v<_ValueType&, const _Tp&>)
	  return ranges::fill(__first, __last, __x);
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__first);
	    for (; __first != __last; ++__first)
	      ::new (__detail::__voidify(*__first)) _ValueType(__x);
	    __guard.release();
	    return __first;
	  }
      }

template<__detail::__nothrow_forward_range _Range, typename _Tp>
      requires constructible_from<range_value_t<_Range>, const _Tp&>
      borrowed_iterator_t<_Range>
      operator()(_Range&& __r, const _Tp& __x) const
      {
	return (*this)(ranges::begin(__r), ranges::end(__r), __x);
      }
  };

inline constexpr __uninitialized_fill_fn uninitialized_fill{};

struct __uninitialized_fill_n_fn
  {
    template<__detail::__nothrow_forward_iterator _Iter, typename _Tp>
      requires constructible_from<iter_value_t<_Iter>, const _Tp&>
      _Iter
      operator()(_Iter __first, iter_difference_t<_Iter> __n,
		 const _Tp& __x) const
      {
	using _ValueType = remove_reference_t<iter_reference_t<_Iter>>;
	if constexpr (is_trivial_v<_ValueType>
		      && is_nothrow_assignable_v<_ValueType&, const _Tp&>)
	  return ranges::fill_n(__first, __n, __x);
	else
	  {
	    auto __guard = __detail::_DestroyGuard(__first);
	    for (; __n > 0; ++__first, (void)--__n)
	      ::new (__detail::__voidify(*__first)) _ValueType(__x);
	    __guard.release();
	    return __first;
	  }
      }
  };

inline constexpr __uninitialized_fill_n_fn uninitialized_fill_n{};

struct __construct_at_fn
  {
    template<typename _Tp, typename... _Args>
      requires requires {
	::new (std::declval<void*>()) _Tp(std::declval<_Args>()...);
      }
      constexpr _Tp*
      operator()(_Tp* __location, _Args&&... __args) const
      noexcept(noexcept(std::construct_at(__location,
					  std::forward<_Args>(__args)...)))
      {
	return std::construct_at(__location,
				 std::forward<_Args>(__args)...);
      }
  };

inline constexpr __construct_at_fn construct_at{};

struct __destroy_at_fn
  {
    template<destructible _Tp>
      constexpr void
      operator()(_Tp* __location) const noexcept
      {
	if constexpr (is_array_v<_Tp>)
	  ranges::destroy(ranges::begin(*__location), ranges::end(*__location));
	else
	  __location->~_Tp();
      }
  };

inline constexpr __destroy_at_fn destroy_at{};

template<__detail::__nothrow_input_iterator _Iter,
	   __detail::__nothrow_sentinel<_Iter> _Sent>
    requires destructible<iter_value_t<_Iter>>
    constexpr _Iter
    __destroy_fn::operator()(_Iter __first, _Sent __last) const noexcept
    {
      if constexpr (is_trivially_destructible_v<iter_value_t<_Iter>>)
	return ranges::next(std::move(__first), __last);
      else
	{
	  for (; __first != __last; ++__first)
	    ranges::destroy_at(std::__addressof(*__first));
	  return __first;
	}
    }

template<__detail::__nothrow_input_range _Range>
    requires destructible<range_value_t<_Range>>
    constexpr borrowed_iterator_t<_Range>
    __destroy_fn::operator()(_Range&& __r) const noexcept
    {
      return (*this)(ranges::begin(__r), ranges::end(__r));
    }

struct __destroy_n_fn
  {
    template<__detail::__nothrow_input_iterator _Iter>
      requires destructible<iter_value_t<_Iter>>
      constexpr _Iter
      operator()(_Iter __first, iter_difference_t<_Iter> __n) const noexcept
      {
	if constexpr (is_trivially_destructible_v<iter_value_t<_Iter>>)
	  return ranges::next(std::move(__first), __n);
	else
	  {
	    for (; __n > 0; ++__first, (void)--__n)
	      ranges::destroy_at(std::__addressof(*__first));
	    return __first;
	  }
      }
  };

inline constexpr __destroy_n_fn destroy_n{};
}
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif // concepts
#endif // C++20
#endif // _RANGES_UNINITIALIZED_H

${this.title}

Code Editor : ranges_uninitialized.h