Gecko [ c.stage.kornherr.net ]

Name	Size	Permission	Date
algorithmfwd.h	24.17 KB	-rw-r--r--	2025-12-18 20:59
align.h	3.62 KB	-rw-r--r--	2025-12-18 20:59
alloc_traits.h	29.53 KB	-rw-r--r--	2025-12-18 20:59
allocated_ptr.h	3.25 KB	-rw-r--r--	2025-12-18 20:59
allocator.h	8.66 KB	-rw-r--r--	2025-12-18 20:59
atomic_base.h	58.7 KB	-rw-r--r--	2025-12-18 20:59
atomic_futex.h	12.08 KB	-rw-r--r--	2025-12-18 20:59
atomic_lockfree_defines.h	2.3 KB	-rw-r--r--	2025-12-18 20:59
atomic_timed_wait.h	13.18 KB	-rw-r--r--	2025-12-18 20:59
atomic_wait.h	12.41 KB	-rw-r--r--	2025-12-18 20:59
basic_ios.h	15.75 KB	-rw-r--r--	2025-12-18 20:59
basic_ios.tcc	5.67 KB	-rw-r--r--	2025-12-18 20:59
basic_string.h	156.46 KB	-rw-r--r--	2025-12-18 20:59
basic_string.tcc	30.3 KB	-rw-r--r--	2025-12-18 20:59
boost_concept_check.h	29.13 KB	-rw-r--r--	2025-12-18 20:59
c++0x_warning.h	1.44 KB	-rw-r--r--	2025-12-18 20:59
char_traits.h	29.05 KB	-rw-r--r--	2025-12-18 20:59
charconv.h	3.58 KB	-rw-r--r--	2025-12-18 20:59
chrono.h	47.06 KB	-rw-r--r--	2025-12-18 20:59
chrono_io.h	76.97 KB	-rw-r--r--	2025-12-18 20:59
codecvt.h	24.9 KB	-rw-r--r--	2025-12-18 20:59
concept_check.h	3.32 KB	-rw-r--r--	2025-12-18 20:59
cow_string.h	130.97 KB	-rw-r--r--	2025-12-18 20:59
cpp_type_traits.h	14.51 KB	-rw-r--r--	2025-12-18 20:59
cxxabi_forced.h	1.77 KB	-rw-r--r--	2025-12-18 20:59
cxxabi_init_exception.h	2.17 KB	-rw-r--r--	2025-12-18 20:59
deque.tcc	41.38 KB	-rw-r--r--	2025-12-18 20:59
enable_special_members.h	12.16 KB	-rw-r--r--	2025-12-18 20:59
erase_if.h	2.09 KB	-rw-r--r--	2025-12-18 20:59
exception.h	2.41 KB	-rw-r--r--	2025-12-18 20:59
exception_defines.h	1.61 KB	-rw-r--r--	2025-12-18 20:59
exception_ptr.h	8.05 KB	-rw-r--r--	2025-12-18 20:59
forward_list.h	49.92 KB	-rw-r--r--	2025-12-18 20:59
forward_list.tcc	13.71 KB	-rw-r--r--	2025-12-18 20:59
fs_dir.h	17.26 KB	-rw-r--r--	2025-12-18 20:59
fs_fwd.h	10.66 KB	-rw-r--r--	2025-12-18 20:59
fs_ops.h	10.49 KB	-rw-r--r--	2025-12-18 20:59
fs_path.h	41.47 KB	-rw-r--r--	2025-12-18 20:59
fstream.tcc	32.64 KB	-rw-r--r--	2025-12-18 20:59
functexcept.h	4.02 KB	-rw-r--r--	2025-12-18 20:59
functional_hash.h	8.79 KB	-rw-r--r--	2025-12-18 20:59
gslice.h	5.39 KB	-rw-r--r--	2025-12-18 20:59
gslice_array.h	7.71 KB	-rw-r--r--	2025-12-18 20:59
hash_bytes.h	2.1 KB	-rw-r--r--	2025-12-18 20:59
hashtable.h	88.71 KB	-rw-r--r--	2025-12-18 20:59
hashtable_policy.h	63.92 KB	-rw-r--r--	2025-12-18 20:59
indirect_array.h	7.72 KB	-rw-r--r--	2025-12-18 20:59
invoke.h	6.08 KB	-rw-r--r--	2025-12-18 20:59
ios_base.h	31.51 KB	-rw-r--r--	2025-12-18 20:59
istream.tcc	31.79 KB	-rw-r--r--	2025-12-18 20:59
iterator_concepts.h	33.72 KB	-rw-r--r--	2025-12-18 20:59
list.tcc	17.63 KB	-rw-r--r--	2025-12-18 20:59
locale_classes.h	24.79 KB	-rw-r--r--	2025-12-18 20:59
locale_classes.tcc	10.61 KB	-rw-r--r--	2025-12-18 20:59
locale_conv.h	18.74 KB	-rw-r--r--	2025-12-18 20:59
locale_facets.h	91.72 KB	-rw-r--r--	2025-12-18 20:59
locale_facets.tcc	40.42 KB	-rw-r--r--	2025-12-18 20:59
locale_facets_nonio.h	69.1 KB	-rw-r--r--	2025-12-18 20:59
locale_facets_nonio.tcc	55.69 KB	-rw-r--r--	2025-12-18 20:59
localefwd.h	5.8 KB	-rw-r--r--	2025-12-18 20:59
mask_array.h	7.77 KB	-rw-r--r--	2025-12-18 20:59
max_size_type.h	22 KB	-rw-r--r--	2025-12-18 20:59
memory_resource.h	15.73 KB	-rw-r--r--	2025-12-18 20:59
memoryfwd.h	2.47 KB	-rw-r--r--	2025-12-18 20:59
mofunc_impl.h	7.45 KB	-rw-r--r--	2025-12-18 20:59
move.h	6.51 KB	-rw-r--r--	2025-12-18 20:59
move_only_function.h	6.12 KB	-rw-r--r--	2025-12-18 20:59
nested_exception.h	7.51 KB	-rw-r--r--	2025-12-18 20:59
new_allocator.h	7.27 KB	-rw-r--r--	2025-12-18 20:59
node_handle.h	11.08 KB	-rw-r--r--	2025-12-18 20:59
ostream.tcc	11.83 KB	-rw-r--r--	2025-12-18 20:59
ostream_insert.h	3.98 KB	-rw-r--r--	2025-12-18 20:59
parse_numbers.h	7.8 KB	-rw-r--r--	2025-12-18 20:59
postypes.h	7.33 KB	-rw-r--r--	2025-12-18 20:59
predefined_ops.h	9.94 KB	-rw-r--r--	2025-12-18 20:59
ptr_traits.h	8.29 KB	-rw-r--r--	2025-12-18 20:59
quoted_string.h	5.01 KB	-rw-r--r--	2025-12-18 20:59
random.h	178.84 KB	-rw-r--r--	2025-12-18 20:59
random.tcc	103.48 KB	-rw-r--r--	2025-12-18 20:59
range_access.h	11.67 KB	-rw-r--r--	2025-12-18 20:59
ranges_algo.h	128.65 KB	-rw-r--r--	2025-12-18 20:59
ranges_algobase.h	18.37 KB	-rw-r--r--	2025-12-18 20:59
ranges_base.h	28.82 KB	-rw-r--r--	2025-12-18 20:59
ranges_cmp.h	5.9 KB	-rw-r--r--	2025-12-18 20:59
ranges_uninitialized.h	17.71 KB	-rw-r--r--	2025-12-18 20:59
ranges_util.h	24.96 KB	-rw-r--r--	2025-12-18 20:59
refwrap.h	13.27 KB	-rw-r--r--	2025-12-18 20:59
regex.h	104.32 KB	-rw-r--r--	2025-12-18 20:59
regex.tcc	16.1 KB	-rw-r--r--	2025-12-18 20:59
regex_automaton.h	10.55 KB	-rw-r--r--	2025-12-18 20:59
regex_automaton.tcc	7.6 KB	-rw-r--r--	2025-12-18 20:59
regex_compiler.h	15.92 KB	-rw-r--r--	2025-12-18 20:59
regex_compiler.tcc	18.48 KB	-rw-r--r--	2025-12-18 20:59
regex_constants.h	14.54 KB	-rw-r--r--	2025-12-18 20:59
regex_error.h	5.35 KB	-rw-r--r--	2025-12-18 20:59
regex_executor.h	8.81 KB	-rw-r--r--	2025-12-18 20:59
regex_executor.tcc	18.49 KB	-rw-r--r--	2025-12-18 20:59
regex_scanner.h	6.88 KB	-rw-r--r--	2025-12-18 20:59
regex_scanner.tcc	14.59 KB	-rw-r--r--	2025-12-18 20:59
requires_hosted.h	1.36 KB	-rw-r--r--	2025-12-18 20:59
semaphore_base.h	7.7 KB	-rw-r--r--	2025-12-18 20:59
shared_ptr.h	38.14 KB	-rw-r--r--	2025-12-18 20:59
shared_ptr_atomic.h	22.79 KB	-rw-r--r--	2025-12-18 20:59
shared_ptr_base.h	65.18 KB	-rw-r--r--	2025-12-18 20:59
slice_array.h	9.39 KB	-rw-r--r--	2025-12-18 20:59
specfun.h	46.07 KB	-rw-r--r--	2025-12-18 20:59
sstream.tcc	9.91 KB	-rw-r--r--	2025-12-18 20:59
std_abs.h	4.63 KB	-rw-r--r--	2025-12-18 20:59
std_function.h	23.12 KB	-rw-r--r--	2025-12-18 20:59
std_mutex.h	6.69 KB	-rw-r--r--	2025-12-18 20:59
std_thread.h	9.84 KB	-rw-r--r--	2025-12-18 20:59
stl_algo.h	212.39 KB	-rw-r--r--	2025-12-18 20:59
stl_algobase.h	74.97 KB	-rw-r--r--	2025-12-18 20:59
stl_bvector.h	41.58 KB	-rw-r--r--	2025-12-18 20:59
stl_construct.h	8.47 KB	-rw-r--r--	2025-12-18 20:59
stl_deque.h	76.34 KB	-rw-r--r--	2025-12-18 20:59
stl_function.h	43.97 KB	-rw-r--r--	2025-12-18 20:59
stl_heap.h	20.31 KB	-rw-r--r--	2025-12-18 20:59
stl_iterator.h	92.81 KB	-rw-r--r--	2025-12-18 20:59
stl_iterator_base_funcs.h	8.75 KB	-rw-r--r--	2025-12-18 20:59
stl_iterator_base_types.h	9.48 KB	-rw-r--r--	2025-12-18 20:59
stl_list.h	70.62 KB	-rw-r--r--	2025-12-18 20:59
stl_map.h	54.86 KB	-rw-r--r--	2025-12-18 20:59
stl_multimap.h	42.71 KB	-rw-r--r--	2025-12-18 20:59
stl_multiset.h	36.87 KB	-rw-r--r--	2025-12-18 20:59
stl_numeric.h	14.25 KB	-rw-r--r--	2025-12-18 20:59
stl_pair.h	36.43 KB	-rw-r--r--	2025-12-18 20:59
stl_queue.h	28.06 KB	-rw-r--r--	2025-12-18 20:59
stl_raw_storage_iter.h	3.91 KB	-rw-r--r--	2025-12-18 20:59
stl_relops.h	4.47 KB	-rw-r--r--	2025-12-18 20:59
stl_set.h	37.13 KB	-rw-r--r--	2025-12-18 20:59
stl_stack.h	13.71 KB	-rw-r--r--	2025-12-18 20:59
stl_tempbuf.h	8.67 KB	-rw-r--r--	2025-12-18 20:59
stl_tree.h	72.06 KB	-rw-r--r--	2025-12-18 20:59
stl_uninitialized.h	35.63 KB	-rw-r--r--	2025-12-18 20:59
stl_vector.h	68.88 KB	-rw-r--r--	2025-12-18 20:59
stream_iterator.h	8.2 KB	-rw-r--r--	2025-12-18 20:59
streambuf.tcc	4.58 KB	-rw-r--r--	2025-12-18 20:59
streambuf_iterator.h	15.57 KB	-rw-r--r--	2025-12-18 20:59
string_view.tcc	7 KB	-rw-r--r--	2025-12-18 20:59
stringfwd.h	2.56 KB	-rw-r--r--	2025-12-18 20:59
this_thread_sleep.h	3.21 KB	-rw-r--r--	2025-12-18 20:59
uniform_int_dist.h	13 KB	-rw-r--r--	2025-12-18 20:59
unique_lock.h	6.16 KB	-rw-r--r--	2025-12-18 20:59
unique_ptr.h	35.62 KB	-rw-r--r--	2025-12-18 20:59
unordered_map.h	75.11 KB	-rw-r--r--	2025-12-18 20:59
unordered_set.h	61.7 KB	-rw-r--r--	2025-12-18 20:59
uses_allocator.h	6.91 KB	-rw-r--r--	2025-12-18 20:59
uses_allocator_args.h	8.53 KB	-rw-r--r--	2025-12-18 20:59
utility.h	8.12 KB	-rw-r--r--	2025-12-18 20:59
valarray_after.h	22.74 KB	-rw-r--r--	2025-12-18 20:59
valarray_array.h	20.8 KB	-rw-r--r--	2025-12-18 20:59
valarray_array.tcc	7.08 KB	-rw-r--r--	2025-12-18 20:59
valarray_before.h	18.69 KB	-rw-r--r--	2025-12-18 20:59
vector.tcc	31.5 KB	-rw-r--r--	2025-12-18 20:59

Rename

// Node handles for containers -*- C++ -*-

// Copyright (C) 2016-2023 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/node_handle.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly.
 *  @headername{map,set,unordered_map,unordered_set}
 */

#ifndef _NODE_HANDLE
#define _NODE_HANDLE 1

#pragma GCC system_header

#if __cplusplus >= 201703L
# define __cpp_lib_node_extract 201606L

#include <new>
#include <bits/alloc_traits.h>
#include <bits/ptr_traits.h>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**
   * @defgroup node_handles Node handles
   * @ingroup associative_containers
   * @since C++17
   *
   * The associative containers (`map`, `set`, `multimap` and `multiset`)
   * support extracting and re-inserting nodes from the container. Those
   * operations use the container's `node_handle` type, which is an alias
   * for a `_Node_handle<...>` type. You should always use the container's
   * `node_handle` type (e.g. `std::set<int>::node_handle`) to refer to
   * these types, not the non-standard internal `_Node_handle` names.
   *
   * @{
   */

/// Base class for node handle types of maps and sets.
  template<typename _Val, typename _NodeAlloc>
    class _Node_handle_common
    {
      using _AllocTraits = allocator_traits<_NodeAlloc>;

public:
      using allocator_type = __alloc_rebind<_NodeAlloc, _Val>;

allocator_type
      get_allocator() const noexcept
      {
	__glibcxx_assert(!this->empty());
	return allocator_type(_M_alloc._M_alloc);
      }

explicit operator bool() const noexcept { return _M_ptr != nullptr; }

[[nodiscard]] bool empty() const noexcept { return _M_ptr == nullptr; }

/// @cond undocumented
    protected:
      constexpr _Node_handle_common() noexcept : _M_ptr() { }

~_Node_handle_common()
      {
	if (!empty())
	  _M_reset();
      }

_Node_handle_common(_Node_handle_common&& __nh) noexcept
      : _M_ptr(__nh._M_ptr)
      {
	if (_M_ptr)
	  _M_move(std::move(__nh));
      }

_Node_handle_common&
      operator=(_Node_handle_common&& __nh) noexcept
      {
	if (empty())
	  {
	    if (!__nh.empty())
	      _M_move(std::move(__nh));
	  }
	else if (__nh.empty())
	  _M_reset();
	else
	  {
	    // Free the current node before replacing the allocator.
	    _AllocTraits::destroy(*_M_alloc, _M_ptr->_M_valptr());
	    _AllocTraits::deallocate(*_M_alloc, _M_ptr, 1);

_M_alloc = __nh._M_alloc.release(); // assigns if POCMA
	    _M_ptr = __nh._M_ptr;
	    __nh._M_ptr = nullptr;
	  }
	return *this;
      }

_Node_handle_common(typename _AllocTraits::pointer __ptr,
			  const _NodeAlloc& __alloc)
      : _M_ptr(__ptr), _M_alloc(__alloc)
      {
	__glibcxx_assert(__ptr != nullptr);
      }

void
      _M_swap(_Node_handle_common& __nh) noexcept
      {
	if (empty())
	  {
	    if (!__nh.empty())
	      _M_move(std::move(__nh));
	  }
	else if (__nh.empty())
	  __nh._M_move(std::move(*this));
	else
	  {
	    using std::swap;
	    swap(_M_ptr, __nh._M_ptr);
	    _M_alloc.swap(__nh._M_alloc); // swaps if POCS
	  }
      }

private:
      // Moves the pointer and allocator from __nh to *this.
      // Precondition: empty() && !__nh.empty()
      // Postcondition: !empty() && __nh.empty()
      void
      _M_move(_Node_handle_common&& __nh) noexcept
      {
	::new (std::__addressof(_M_alloc)) _NodeAlloc(__nh._M_alloc.release());
	_M_ptr = __nh._M_ptr;
	__nh._M_ptr = nullptr;
      }

// Deallocates the node, destroys the allocator.
      // Precondition: !empty()
      // Postcondition: empty()
      void
      _M_reset() noexcept
      {
	_NodeAlloc __alloc = _M_alloc.release();
	_AllocTraits::destroy(__alloc, _M_ptr->_M_valptr());
	_AllocTraits::deallocate(__alloc, _M_ptr, 1);
	_M_ptr = nullptr;
      }

// Destroys the allocator. Does not deallocate or destroy the node.
      // Precondition: !empty()
      // Postcondition: empty()
      void
      release() noexcept
      {
	_M_alloc.release();
	_M_ptr = nullptr;
      }

protected:
      typename _AllocTraits::pointer _M_ptr;

private:
      // A simplified, non-copyable std::optional<_NodeAlloc>.
      // Call release() before destruction iff the allocator member is active.
      union _Optional_alloc
      {
	_Optional_alloc() { }
	~_Optional_alloc() { }

_Optional_alloc(_Optional_alloc&&) = delete;
	_Optional_alloc& operator=(_Optional_alloc&&) = delete;

_Optional_alloc(const _NodeAlloc& __alloc) noexcept
	: _M_alloc(__alloc)
	{ }

// Precondition: _M_alloc is the active member of the union.
	void
	operator=(_NodeAlloc&& __alloc) noexcept
	{
	  using _ATr = _AllocTraits;
	  if constexpr (_ATr::propagate_on_container_move_assignment::value)
	    _M_alloc = std::move(__alloc);
	  else if constexpr (!_AllocTraits::is_always_equal::value)
	    __glibcxx_assert(_M_alloc == __alloc);
	}

// Precondition: _M_alloc is the active member of both unions.
	void
	swap(_Optional_alloc& __other) noexcept
	{
	  using std::swap;
	  if constexpr (_AllocTraits::propagate_on_container_swap::value)
	    swap(_M_alloc, __other._M_alloc);
	  else if constexpr (!_AllocTraits::is_always_equal::value)
	    __glibcxx_assert(_M_alloc == __other._M_alloc);
	}

// Precondition: _M_alloc is the active member of the union.
	_NodeAlloc& operator*() noexcept { return _M_alloc; }

// Precondition: _M_alloc is the active member of the union.
	_NodeAlloc release() noexcept
	{
	  _NodeAlloc __tmp = std::move(_M_alloc);
	  _M_alloc.~_NodeAlloc();
	  return __tmp;
	}

[[__no_unique_address__]] _NodeAlloc _M_alloc;
      };

[[__no_unique_address__]] _Optional_alloc _M_alloc;

template<typename _Key2, typename _Value2, typename _KeyOfValue,
	       typename _Compare, typename _ValueAlloc>
	friend class _Rb_tree;

template<typename _Key2, typename _Value2, typename _ValueAlloc,
	       typename _ExtractKey, typename _Equal,
	       typename _Hash, typename _RangeHash, typename _Unused,
	       typename _RehashPolicy, typename _Traits>
	friend class _Hashtable;

/// @endcond
    };

/// Node handle type for maps.
  template<typename _Key, typename _Value, typename _NodeAlloc>
    class _Node_handle : public _Node_handle_common<_Value, _NodeAlloc>
    {
    public:
      constexpr _Node_handle() noexcept = default;
      ~_Node_handle() = default;
      _Node_handle(_Node_handle&&) noexcept = default;

_Node_handle&
      operator=(_Node_handle&&) noexcept = default;

using key_type = _Key;
      using mapped_type = typename _Value::second_type;

key_type&
      key() const noexcept
      {
	__glibcxx_assert(!this->empty());
	return *_M_pkey;
      }

mapped_type&
      mapped() const noexcept
      {
	__glibcxx_assert(!this->empty());
	return *_M_pmapped;
      }

void
      swap(_Node_handle& __nh) noexcept
      {
	this->_M_swap(__nh);
	using std::swap;
	swap(_M_pkey, __nh._M_pkey);
	swap(_M_pmapped, __nh._M_pmapped);
      }

friend void
      swap(_Node_handle& __x, _Node_handle& __y)
      noexcept(noexcept(__x.swap(__y)))
      { __x.swap(__y); }

private:
      using _AllocTraits = allocator_traits<_NodeAlloc>;

_Node_handle(typename _AllocTraits::pointer __ptr,
		   const _NodeAlloc& __alloc)
      : _Node_handle_common<_Value, _NodeAlloc>(__ptr, __alloc)
      {
	if (__ptr)
	  {
	    auto& __key = const_cast<_Key&>(__ptr->_M_valptr()->first);
	    _M_pkey = _S_pointer_to(__key);
	    _M_pmapped = _S_pointer_to(__ptr->_M_valptr()->second);
	  }
	else
	  {
	    _M_pkey = nullptr;
	    _M_pmapped = nullptr;
	  }
      }

template<typename _Tp>
	using __pointer
	  = __ptr_rebind<typename _AllocTraits::pointer,
			 remove_reference_t<_Tp>>;

__pointer<_Key>				_M_pkey = nullptr;
      __pointer<typename _Value::second_type>	_M_pmapped = nullptr;

template<typename _Tp>
	__pointer<_Tp>
	_S_pointer_to(_Tp& __obj)
	{ return pointer_traits<__pointer<_Tp>>::pointer_to(__obj); }

const key_type&
      _M_key() const noexcept { return key(); }

template<typename _Key2, typename _Value2, typename _KeyOfValue,
	       typename _Compare, typename _ValueAlloc>
	friend class _Rb_tree;

/// Node handle type for sets.
  template<typename _Value, typename _NodeAlloc>
    class _Node_handle<_Value, _Value, _NodeAlloc>
    : public _Node_handle_common<_Value, _NodeAlloc>
    {
    public:
      constexpr _Node_handle() noexcept = default;
      ~_Node_handle() = default;
      _Node_handle(_Node_handle&&) noexcept = default;

_Node_handle&
      operator=(_Node_handle&&) noexcept = default;

using value_type = _Value;

value_type&
      value() const noexcept
      {
	__glibcxx_assert(!this->empty());
	return *this->_M_ptr->_M_valptr();
      }

void
      swap(_Node_handle& __nh) noexcept
      { this->_M_swap(__nh); }

friend void
      swap(_Node_handle& __x, _Node_handle& __y)
      noexcept(noexcept(__x.swap(__y)))
      { __x.swap(__y); }

private:
      using _AllocTraits = allocator_traits<_NodeAlloc>;

_Node_handle(typename _AllocTraits::pointer __ptr,
		   const _NodeAlloc& __alloc)
      : _Node_handle_common<_Value, _NodeAlloc>(__ptr, __alloc) { }

const value_type&
      _M_key() const noexcept { return value(); }

template<typename _Key, typename _Val, typename _KeyOfValue,
	       typename _Compare, typename _Alloc>
	friend class _Rb_tree;

/// Return type of insert(node_handle&&) on unique maps/sets.
  template<typename _Iterator, typename _NodeHandle>
    struct _Node_insert_return
    {
      _Iterator		position = _Iterator();
      bool		inserted = false;
      _NodeHandle	node;
    };

/// @}

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std

#endif // C++17
#endif