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algorithmfwd.h	21.03 KB	-rwxrwxrwx	2018-02-14 17:53
alloc_traits.h	19.13 KB	-rwxrwxrwx	2018-02-14 17:53
allocated_ptr.h	3.42 KB	-rwxrwxrwx	2018-02-14 17:53
allocator.h	6.76 KB	-rwxrwxrwx	2018-02-14 17:53
atomic_base.h	23.41 KB	-rwxrwxrwx	2018-02-14 17:53
atomic_futex.h	9.35 KB	-rwxrwxrwx	2018-02-14 17:53
atomic_lockfree_defines.h	2.2 KB	-rwxrwxrwx	2018-02-14 17:53
basic_ios.h	15.7 KB	-rwxrwxrwx	2018-02-14 17:53
basic_ios.tcc	5.89 KB	-rwxrwxrwx	2018-02-14 17:53
basic_string.h	203.81 KB	-rwxrwxrwx	2018-02-14 17:53
basic_string.tcc	50.58 KB	-rwxrwxrwx	2018-02-14 17:53
boost_concept_check.h	26.41 KB	-rwxrwxrwx	2018-02-14 17:53
c++0x_warning.h	1.44 KB	-rwxrwxrwx	2018-02-14 17:53
c++14_warning.h	1.48 KB	-rwxrwxrwx	2018-02-14 17:53
char_traits.h	17.56 KB	-rwxrwxrwx	2018-02-14 17:53
codecvt.h	20.8 KB	-rwxrwxrwx	2018-02-14 17:53
concept_check.h	3.34 KB	-rwxrwxrwx	2018-02-14 17:53
cpp_type_traits.h	9.37 KB	-rwxrwxrwx	2018-02-14 17:53
cxxabi_forced.h	1.77 KB	-rwxrwxrwx	2018-02-14 17:53
deque.tcc	32.89 KB	-rwxrwxrwx	2018-02-14 17:53
enable_special_members.h	10.87 KB	-rwxrwxrwx	2018-02-14 17:53
exception_defines.h	1.61 KB	-rwxrwxrwx	2018-02-14 17:53
exception_ptr.h	5.6 KB	-rwxrwxrwx	2018-02-14 17:53
forward_list.h	47.46 KB	-rwxrwxrwx	2018-02-14 17:53
forward_list.tcc	14.74 KB	-rwxrwxrwx	2018-02-14 17:53
fstream.tcc	32.1 KB	-rwxrwxrwx	2018-02-14 17:53
functexcept.h	3.18 KB	-rwxrwxrwx	2018-02-14 17:53
functional_hash.h	7.49 KB	-rwxrwxrwx	2018-02-14 17:53
gslice.h	5.39 KB	-rwxrwxrwx	2018-02-14 17:53
gslice_array.h	7.59 KB	-rwxrwxrwx	2018-02-14 17:53
hash_bytes.h	2.1 KB	-rwxrwxrwx	2018-02-14 17:53
hashtable.h	67.52 KB	-rwxrwxrwx	2018-02-14 17:53
hashtable_policy.h	62.54 KB	-rwxrwxrwx	2018-02-14 17:53
indirect_array.h	7.68 KB	-rwxrwxrwx	2018-02-14 17:53
ios_base.h	30.22 KB	-rwxrwxrwx	2018-02-14 17:53
istream.tcc	30.21 KB	-rwxrwxrwx	2018-02-14 17:53
list.tcc	15.1 KB	-rwxrwxrwx	2018-02-14 17:53
locale_classes.h	24.31 KB	-rwxrwxrwx	2018-02-14 17:53
locale_classes.tcc	8.18 KB	-rwxrwxrwx	2018-02-14 17:53
locale_conv.h	15.69 KB	-rwxrwxrwx	2018-02-14 17:53
locale_facets.h	89.93 KB	-rwxrwxrwx	2018-02-14 17:53
locale_facets.tcc	38.64 KB	-rwxrwxrwx	2018-02-14 17:53
locale_facets_nonio.h	67.33 KB	-rwxrwxrwx	2018-02-14 17:53
locale_facets_nonio.tcc	44.08 KB	-rwxrwxrwx	2018-02-14 17:53
localefwd.h	5.51 KB	-rwxrwxrwx	2018-02-14 17:53
mask_array.h	7.42 KB	-rwxrwxrwx	2018-02-14 17:53
memoryfwd.h	2.36 KB	-rwxrwxrwx	2018-02-14 17:53
move.h	6.19 KB	-rwxrwxrwx	2018-02-14 17:53
nested_exception.h	4.82 KB	-rwxrwxrwx	2018-02-14 17:53
ostream.tcc	12.03 KB	-rwxrwxrwx	2018-02-14 17:53
ostream_insert.h	3.91 KB	-rwxrwxrwx	2018-02-14 17:53
parse_numbers.h	7.58 KB	-rwxrwxrwx	2018-02-14 17:53
postypes.h	8.02 KB	-rwxrwxrwx	2018-02-14 17:53
predefined_ops.h	7.78 KB	-rwxrwxrwx	2018-02-14 17:53
ptr_traits.h	4.75 KB	-rwxrwxrwx	2018-02-14 17:53
quoted_string.h	4.47 KB	-rwxrwxrwx	2018-02-14 17:53
random.h	169.29 KB	-rwxrwxrwx	2018-02-14 17:53
random.tcc	103.07 KB	-rwxrwxrwx	2018-02-14 17:53
range_access.h	9.32 KB	-rwxrwxrwx	2018-02-14 17:53
regex.h	94.62 KB	-rwxrwxrwx	2018-02-14 17:53
regex.tcc	16.09 KB	-rwxrwxrwx	2018-02-14 17:53
regex_automaton.h	10.43 KB	-rwxrwxrwx	2018-02-14 17:53
regex_automaton.tcc	7.65 KB	-rwxrwxrwx	2018-02-14 17:53
regex_compiler.h	14.42 KB	-rwxrwxrwx	2018-02-14 17:53
regex_compiler.tcc	17.97 KB	-rwxrwxrwx	2018-02-14 17:53
regex_constants.h	13.93 KB	-rwxrwxrwx	2018-02-14 17:53
regex_error.h	4.85 KB	-rwxrwxrwx	2018-02-14 17:53
regex_executor.h	6.61 KB	-rwxrwxrwx	2018-02-14 17:53
regex_executor.tcc	13.9 KB	-rwxrwxrwx	2018-02-14 17:53
regex_scanner.h	6.88 KB	-rwxrwxrwx	2018-02-14 17:53
regex_scanner.tcc	14.6 KB	-rwxrwxrwx	2018-02-14 17:53
shared_ptr.h	19.78 KB	-rwxrwxrwx	2018-02-14 17:53
shared_ptr_atomic.h	9.54 KB	-rwxrwxrwx	2018-02-14 17:53
shared_ptr_base.h	44.6 KB	-rwxrwxrwx	2018-02-14 17:53
slice_array.h	9.13 KB	-rwxrwxrwx	2018-02-14 17:53
specfun.h	44 KB	-rwxrwxrwx	2018-02-14 17:53
sstream.tcc	9.27 KB	-rwxrwxrwx	2018-02-14 17:53
std_mutex.h	9 KB	-rwxrwxrwx	2018-02-14 17:53
stl_algo.h	200.43 KB	-rwxrwxrwx	2018-02-14 17:53
stl_algobase.h	49.22 KB	-rwxrwxrwx	2018-02-14 17:53
stl_bvector.h	32.69 KB	-rwxrwxrwx	2018-02-14 17:53
stl_construct.h	5.05 KB	-rwxrwxrwx	2018-02-14 17:53
stl_deque.h	76.16 KB	-rwxrwxrwx	2018-02-14 17:53
stl_function.h	32.5 KB	-rwxrwxrwx	2018-02-14 17:53
stl_heap.h	18.75 KB	-rwxrwxrwx	2018-02-14 17:53
stl_iterator.h	39.39 KB	-rwxrwxrwx	2018-02-14 17:53
stl_iterator_base_funcs.h	7.69 KB	-rwxrwxrwx	2018-02-14 17:53
stl_iterator_base_types.h	8.45 KB	-rwxrwxrwx	2018-02-14 17:53
stl_list.h	64.03 KB	-rwxrwxrwx	2018-02-14 17:53
stl_map.h	49.45 KB	-rwxrwxrwx	2018-02-14 17:53
stl_multimap.h	37.09 KB	-rwxrwxrwx	2018-02-14 17:53
stl_multiset.h	31.18 KB	-rwxrwxrwx	2018-02-14 17:53
stl_numeric.h	13.51 KB	-rwxrwxrwx	2018-02-14 17:53
stl_pair.h	17.18 KB	-rwxrwxrwx	2018-02-14 17:53
stl_queue.h	20.26 KB	-rwxrwxrwx	2018-02-14 17:53
stl_raw_storage_iter.h	3.74 KB	-rwxrwxrwx	2018-02-14 17:53
stl_relops.h	4.49 KB	-rwxrwxrwx	2018-02-14 17:53
stl_set.h	31.43 KB	-rwxrwxrwx	2018-02-14 17:53
stl_stack.h	10.56 KB	-rwxrwxrwx	2018-02-14 17:53
stl_tempbuf.h	8.15 KB	-rwxrwxrwx	2018-02-14 17:53
stl_tree.h	67.86 KB	-rwxrwxrwx	2018-02-14 17:53
stl_uninitialized.h	21.38 KB	-rwxrwxrwx	2018-02-14 17:53
stl_vector.h	52.4 KB	-rwxrwxrwx	2018-02-14 17:53
stream_iterator.h	6.44 KB	-rwxrwxrwx	2018-02-14 17:53
streambuf.tcc	4.81 KB	-rwxrwxrwx	2018-02-14 17:53
streambuf_iterator.h	12.33 KB	-rwxrwxrwx	2018-02-14 17:53
stringfwd.h	2.55 KB	-rwxrwxrwx	2018-02-14 17:53
uniform_int_dist.h	9.73 KB	-rwxrwxrwx	2018-02-14 17:53
unique_ptr.h	24.36 KB	-rwxrwxrwx	2018-02-14 17:53
unordered_map.h	61.39 KB	-rwxrwxrwx	2018-02-14 17:53
unordered_set.h	47.59 KB	-rwxrwxrwx	2018-02-14 17:53
uses_allocator.h	3.68 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_after.h	22.12 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_array.h	21.23 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_array.tcc	7.08 KB	-rwxrwxrwx	2018-02-14 17:53
valarray_before.h	18.08 KB	-rwxrwxrwx	2018-02-14 17:53
vector.tcc	26.42 KB	-rwxrwxrwx	2018-02-14 17:53

Rename

// unique_ptr implementation -*- C++ -*-

// Copyright (C) 2008-2016 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/unique_ptr.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{memory}
 */

#ifndef _UNIQUE_PTR_H
#define _UNIQUE_PTR_H 1

#include <bits/c++config.h>
#include <debug/assertions.h>
#include <type_traits>
#include <utility>
#include <tuple>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

/**
   * @addtogroup pointer_abstractions
   * @{
   */

#if _GLIBCXX_USE_DEPRECATED
  template<typename> class auto_ptr;
#endif

/// Primary template of default_delete, used by unique_ptr
  template<typename _Tp>
    struct default_delete
    {
      /// Default constructor
      constexpr default_delete() noexcept = default;

/** @brief Converting constructor.
       *
       * Allows conversion from a deleter for arrays of another type, @p _Up,
       * only if @p _Up* is convertible to @p _Tp*.
       */
      template<typename _Up, typename = typename
	       enable_if<is_convertible<_Up*, _Tp*>::value>::type>
        default_delete(const default_delete<_Up>&) noexcept { }

/// Calls @c delete @p __ptr
      void
      operator()(_Tp* __ptr) const
      {
	static_assert(!is_void<_Tp>::value,
		      "can't delete pointer to incomplete type");
	static_assert(sizeof(_Tp)>0,
		      "can't delete pointer to incomplete type");
	delete __ptr;
      }
    };

// _GLIBCXX_RESOLVE_LIB_DEFECTS
  // DR 740 - omit specialization for array objects with a compile time length
  /// Specialization for arrays, default_delete.
  template<typename _Tp>
    struct default_delete<_Tp[]>
    {
    public:
      /// Default constructor
      constexpr default_delete() noexcept = default;

/** @brief Converting constructor.
       *
       * Allows conversion from a deleter for arrays of another type, such as
       * a const-qualified version of @p _Tp.
       *
       * Conversions from types derived from @c _Tp are not allowed because
       * it is unsafe to @c delete[] an array of derived types through a
       * pointer to the base type.
       */
      template<typename _Up, typename = typename
	       enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value>::type>
        default_delete(const default_delete<_Up[]>&) noexcept { }

/// Calls @c delete[] @p __ptr
      template<typename _Up>
      typename enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value>::type
	operator()(_Up* __ptr) const
      {
	static_assert(sizeof(_Tp)>0,
		      "can't delete pointer to incomplete type");
	delete [] __ptr;
      }
    };

/// 20.7.1.2 unique_ptr for single objects.
  template <typename _Tp, typename _Dp = default_delete<_Tp> >
    class unique_ptr
    {
      // use SFINAE to determine whether _Del::pointer exists
      class _Pointer
      {
	template<typename _Up>
	  static typename _Up::pointer __test(typename _Up::pointer*);

template<typename _Up>
	  static _Tp* __test(...);

typedef typename remove_reference<_Dp>::type _Del;

public:
	typedef decltype(__test<_Del>(0)) type;
      };

typedef std::tuple<typename _Pointer::type, _Dp>  __tuple_type;
      __tuple_type                                      _M_t;

public:
      typedef typename _Pointer::type   pointer;
      typedef _Tp                       element_type;
      typedef _Dp                       deleter_type;

// helper template for detecting a safe conversion from another
      // unique_ptr
      template<typename _Up, typename _Ep>
	using __safe_conversion_up = __and_<
	        is_convertible<typename unique_ptr<_Up, _Ep>::pointer, pointer>,
                __not_<is_array<_Up>>,
                __or_<__and_<is_reference<deleter_type>,
                             is_same<deleter_type, _Ep>>,
                      __and_<__not_<is_reference<deleter_type>>,
                             is_convertible<_Ep, deleter_type>>
                >
              >;

// Constructors.

/// Default constructor, creates a unique_ptr that owns nothing.
      constexpr unique_ptr() noexcept
      : _M_t()
      { static_assert(!is_pointer<deleter_type>::value,
		     "constructed with null function pointer deleter"); }

/** Takes ownership of a pointer.
       *
       * @param __p  A pointer to an object of @c element_type
       *
       * The deleter will be value-initialized.
       */
      explicit
      unique_ptr(pointer __p) noexcept
      : _M_t()
      {
	std::get<0>(_M_t) = __p;
	static_assert(!is_pointer<deleter_type>::value,
		     "constructed with null function pointer deleter");
      }

/** Takes ownership of a pointer.
       *
       * @param __p  A pointer to an object of @c element_type
       * @param __d  A reference to a deleter.
       *
       * The deleter will be initialized with @p __d
       */
      unique_ptr(pointer __p,
	  typename conditional<is_reference<deleter_type>::value,
	    deleter_type, const deleter_type&>::type __d) noexcept
      : _M_t(__p, __d) { }

/** Takes ownership of a pointer.
       *
       * @param __p  A pointer to an object of @c element_type
       * @param __d  An rvalue reference to a deleter.
       *
       * The deleter will be initialized with @p std::move(__d)
       */
      unique_ptr(pointer __p,
	  typename remove_reference<deleter_type>::type&& __d) noexcept
      : _M_t(std::move(__p), std::move(__d))
      { static_assert(!std::is_reference<deleter_type>::value,
		      "rvalue deleter bound to reference"); }

/// Creates a unique_ptr that owns nothing.
      constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }

// Move constructors.

/// Move constructor.
      unique_ptr(unique_ptr&& __u) noexcept
      : _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) { }

/** @brief Converting constructor from another type
       *
       * Requires that the pointer owned by @p __u is convertible to the
       * type of pointer owned by this object, @p __u does not own an array,
       * and @p __u has a compatible deleter type.
       */
      template<typename _Up, typename _Ep, typename = _Require<
               __safe_conversion_up<_Up, _Ep>,
	       typename conditional<is_reference<_Dp>::value,
				    is_same<_Ep, _Dp>,
				    is_convertible<_Ep, _Dp>>::type>>
	unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept
	: _M_t(__u.release(), std::forward<_Ep>(__u.get_deleter()))
	{ }

#if _GLIBCXX_USE_DEPRECATED
      /// Converting constructor from @c auto_ptr
      template<typename _Up, typename = _Require<
	       is_convertible<_Up*, _Tp*>, is_same<_Dp, default_delete<_Tp>>>>
	unique_ptr(auto_ptr<_Up>&& __u) noexcept;
#endif

/// Destructor, invokes the deleter if the stored pointer is not null.
      ~unique_ptr() noexcept
      {
	auto& __ptr = std::get<0>(_M_t);
	if (__ptr != nullptr)
	  get_deleter()(__ptr);
	__ptr = pointer();
      }

// Assignment.

/** @brief Move assignment operator.
       *
       * @param __u  The object to transfer ownership from.
       *
       * Invokes the deleter first if this object owns a pointer.
       */
      unique_ptr&
      operator=(unique_ptr&& __u) noexcept
      {
	reset(__u.release());
	get_deleter() = std::forward<deleter_type>(__u.get_deleter());
	return *this;
      }

/** @brief Assignment from another type.
       *
       * @param __u  The object to transfer ownership from, which owns a
       *             convertible pointer to a non-array object.
       *
       * Invokes the deleter first if this object owns a pointer.
       */
      template<typename _Up, typename _Ep>
        typename enable_if< __and_<
          __safe_conversion_up<_Up, _Ep>,
          is_assignable<deleter_type&, _Ep&&>
          >::value,
          unique_ptr&>::type
	operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
	{
	  reset(__u.release());
	  get_deleter() = std::forward<_Ep>(__u.get_deleter());
	  return *this;
	}

/// Reset the %unique_ptr to empty, invoking the deleter if necessary.
      unique_ptr&
      operator=(nullptr_t) noexcept
      {
	reset();
	return *this;
      }

// Observers.

/// Dereference the stored pointer.
      typename add_lvalue_reference<element_type>::type
      operator*() const
      {
	__glibcxx_assert(get() != pointer());
	return *get();
      }

/// Return the stored pointer.
      pointer
      operator->() const noexcept
      {
	_GLIBCXX_DEBUG_PEDASSERT(get() != pointer());
	return get();
      }

/// Return the stored pointer.
      pointer
      get() const noexcept
      { return std::get<0>(_M_t); }

/// Return a reference to the stored deleter.
      deleter_type&
      get_deleter() noexcept
      { return std::get<1>(_M_t); }

/// Return a reference to the stored deleter.
      const deleter_type&
      get_deleter() const noexcept
      { return std::get<1>(_M_t); }

/// Return @c true if the stored pointer is not null.
      explicit operator bool() const noexcept
      { return get() == pointer() ? false : true; }

// Modifiers.

/// Release ownership of any stored pointer.
      pointer
      release() noexcept
      {
	pointer __p = get();
	std::get<0>(_M_t) = pointer();
	return __p;
      }

/** @brief Replace the stored pointer.
       *
       * @param __p  The new pointer to store.
       *
       * The deleter will be invoked if a pointer is already owned.
       */
      void
      reset(pointer __p = pointer()) noexcept
      {
	using std::swap;
	swap(std::get<0>(_M_t), __p);
	if (__p != pointer())
	  get_deleter()(__p);
      }

/// Exchange the pointer and deleter with another object.
      void
      swap(unique_ptr& __u) noexcept
      {
	using std::swap;
	swap(_M_t, __u._M_t);
      }

// Disable copy from lvalue.
      unique_ptr(const unique_ptr&) = delete;
      unique_ptr& operator=(const unique_ptr&) = delete;
  };

/// 20.7.1.3 unique_ptr for array objects with a runtime length
  // [unique.ptr.runtime]
  // _GLIBCXX_RESOLVE_LIB_DEFECTS
  // DR 740 - omit specialization for array objects with a compile time length
  template<typename _Tp, typename _Dp>
    class unique_ptr<_Tp[], _Dp>
    {
      // use SFINAE to determine whether _Del::pointer exists
      class _Pointer
      {
	template<typename _Up>
	  static typename _Up::pointer __test(typename _Up::pointer*);

template<typename _Up>
	  static _Tp* __test(...);

typedef typename remove_reference<_Dp>::type _Del;

public:
	typedef decltype(__test<_Del>(0)) type;
      };

typedef std::tuple<typename _Pointer::type, _Dp>  __tuple_type;
      __tuple_type                                      _M_t;

template<typename _Up>
	using __remove_cv = typename remove_cv<_Up>::type;

// like is_base_of<_Tp, _Up> but false if unqualified types are the same
      template<typename _Up>
	using __is_derived_Tp
	  = __and_< is_base_of<_Tp, _Up>,
		    __not_<is_same<__remove_cv<_Tp>, __remove_cv<_Up>>> >;

public:
      typedef typename _Pointer::type	pointer;
      typedef _Tp		 	element_type;
      typedef _Dp                       deleter_type;

// helper template for detecting a safe conversion from another
      // unique_ptr
      template<typename _Up, typename _Ep,
               typename _Up_up = unique_ptr<_Up, _Ep>,
	       typename _Up_element_type = typename _Up_up::element_type>
	using __safe_conversion_up = __and_<
          is_array<_Up>,
          is_same<pointer, element_type*>,
          is_same<typename _Up_up::pointer, _Up_element_type*>,
          is_convertible<_Up_element_type(*)[], element_type(*)[]>,
          __or_<__and_<is_reference<deleter_type>, is_same<deleter_type, _Ep>>,
                __and_<__not_<is_reference<deleter_type>>,
                       is_convertible<_Ep, deleter_type>>>
        >;

// helper template for detecting a safe conversion from a raw pointer
      template<typename _Up>
        using __safe_conversion_raw = __and_<
          __or_<__or_<is_same<_Up, pointer>,
                      is_same<_Up, nullptr_t>>,
                __and_<is_pointer<_Up>,
                       is_same<pointer, element_type*>,
                       is_convertible<
                         typename remove_pointer<_Up>::type(*)[],
                         element_type(*)[]>
                >
          >
        >;

// Constructors.

/// Default constructor, creates a unique_ptr that owns nothing.
      constexpr unique_ptr() noexcept
      : _M_t()
      { static_assert(!std::is_pointer<deleter_type>::value,
		      "constructed with null function pointer deleter"); }

/** Takes ownership of a pointer.
       *
       * @param __p  A pointer to an array of a type safely convertible
       * to an array of @c element_type
       *
       * The deleter will be value-initialized.
       */
      template<typename _Up,
               typename = typename enable_if<
                 __safe_conversion_raw<_Up>::value, bool>::type>
      explicit
      unique_ptr(_Up __p) noexcept
      : _M_t(__p, deleter_type())
      { static_assert(!is_pointer<deleter_type>::value,
		      "constructed with null function pointer deleter"); }

/** Takes ownership of a pointer.
       *
       * @param __p  A pointer to an array of a type safely convertible
       * to an array of @c element_type
       * @param __d  A reference to a deleter.
       *
       * The deleter will be initialized with @p __d
       */
      template<typename _Up,
               typename = typename enable_if<
                 __safe_conversion_raw<_Up>::value, bool>::type>
      unique_ptr(_Up __p,
                 typename conditional<is_reference<deleter_type>::value,
                 deleter_type, const deleter_type&>::type __d) noexcept
      : _M_t(__p, __d) { }

/** Takes ownership of a pointer.
       *
       * @param __p  A pointer to an array of a type safely convertible
       * to an array of @c element_type
       * @param __d  A reference to a deleter.
       *
       * The deleter will be initialized with @p std::move(__d)
       */
      template<typename _Up,
               typename = typename enable_if<
                 __safe_conversion_raw<_Up>::value, bool>::type>
      unique_ptr(_Up __p, typename
		 remove_reference<deleter_type>::type&& __d) noexcept
      : _M_t(std::move(__p), std::move(__d))
      { static_assert(!is_reference<deleter_type>::value,
		      "rvalue deleter bound to reference"); }

/// Move constructor.
      unique_ptr(unique_ptr&& __u) noexcept
      : _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) { }

/// Creates a unique_ptr that owns nothing.
      constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }

template<typename _Up, typename _Ep,
	       typename = _Require<__safe_conversion_up<_Up, _Ep>>>
	unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept
	: _M_t(__u.release(), std::forward<_Ep>(__u.get_deleter()))
	{ }

/// Destructor, invokes the deleter if the stored pointer is not null.
      ~unique_ptr()
      {
	auto& __ptr = std::get<0>(_M_t);
	if (__ptr != nullptr)
	  get_deleter()(__ptr);
	__ptr = pointer();
      }

// Assignment.

/** @brief Assignment from another type.
       *
       * @param __u  The object to transfer ownership from, which owns a
       *             convertible pointer to an array object.
       *
       * Invokes the deleter first if this object owns a pointer.
       */
      template<typename _Up, typename _Ep>
	typename
	enable_if<__and_<__safe_conversion_up<_Up, _Ep>,
                         is_assignable<deleter_type&, _Ep&&>
                  >::value,
                  unique_ptr&>::type
	operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
	{
	  reset(__u.release());
	  get_deleter() = std::forward<_Ep>(__u.get_deleter());
	  return *this;
	}

/// Reset the %unique_ptr to empty, invoking the deleter if necessary.
      unique_ptr&
      operator=(nullptr_t) noexcept
      {
	reset();
	return *this;
      }

// Observers.

/// Access an element of owned array.
      typename std::add_lvalue_reference<element_type>::type
      operator[](size_t __i) const
      {
	__glibcxx_assert(get() != pointer());
	return get()[__i];
      }

/// Return the stored pointer.
      pointer
      get() const noexcept
      { return std::get<0>(_M_t); }

/// Return a reference to the stored deleter.
      deleter_type&
      get_deleter() noexcept
      { return std::get<1>(_M_t); }

/// Return a reference to the stored deleter.
      const deleter_type&
      get_deleter() const noexcept
      { return std::get<1>(_M_t); }

/// Return @c true if the stored pointer is not null.
      explicit operator bool() const noexcept
      { return get() == pointer() ? false : true; }

// Modifiers.

/// Release ownership of any stored pointer.
      pointer
      release() noexcept
      {
	pointer __p = get();
	std::get<0>(_M_t) = pointer();
	return __p;
      }

/** @brief Replace the stored pointer.
       *
       * @param __p  The new pointer to store.
       *
       * The deleter will be invoked if a pointer is already owned.
       */
      template <typename _Up,
                typename = _Require<
                  __or_<is_same<_Up, pointer>,
                        __and_<is_same<pointer, element_type*>,
                               is_pointer<_Up>,
                               is_convertible<
                                 typename remove_pointer<_Up>::type(*)[],
                                 element_type(*)[]
                               >
                        >
                  >
               >>
      void
      reset(_Up __p) noexcept
      {
	pointer __ptr = __p;
	using std::swap;
	swap(std::get<0>(_M_t), __ptr);
	if (__ptr != nullptr)
	  get_deleter()(__ptr);
      }

void reset(nullptr_t = nullptr) noexcept
      {
        reset(pointer());
      }

/// Exchange the pointer and deleter with another object.
      void
      swap(unique_ptr& __u) noexcept
      {
	using std::swap;
	swap(_M_t, __u._M_t);
      }

// Disable copy from lvalue.
      unique_ptr(const unique_ptr&) = delete;
      unique_ptr& operator=(const unique_ptr&) = delete;
    };

template<typename _Tp, typename _Dp>
    inline void
    swap(unique_ptr<_Tp, _Dp>& __x,
	 unique_ptr<_Tp, _Dp>& __y) noexcept
    { __x.swap(__y); }

template<typename _Tp, typename _Dp,
	   typename _Up, typename _Ep>
    inline bool
    operator==(const unique_ptr<_Tp, _Dp>& __x,
	       const unique_ptr<_Up, _Ep>& __y)
    { return __x.get() == __y.get(); }

template<typename _Tp, typename _Dp>
    inline bool
    operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept
    { return !__x; }

template<typename _Tp, typename _Dp>
    inline bool
    operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept
    { return !__x; }

template<typename _Tp, typename _Dp,
	   typename _Up, typename _Ep>
    inline bool
    operator!=(const unique_ptr<_Tp, _Dp>& __x,
	       const unique_ptr<_Up, _Ep>& __y)
    { return __x.get() != __y.get(); }

template<typename _Tp, typename _Dp>
    inline bool
    operator!=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept
    { return (bool)__x; }

template<typename _Tp, typename _Dp>
    inline bool
    operator!=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept
    { return (bool)__x; }

template<typename _Tp, typename _Dp,
	   typename _Up, typename _Ep>
    inline bool
    operator<(const unique_ptr<_Tp, _Dp>& __x,
	      const unique_ptr<_Up, _Ep>& __y)
    {
      typedef typename
	std::common_type<typename unique_ptr<_Tp, _Dp>::pointer,
	                 typename unique_ptr<_Up, _Ep>::pointer>::type _CT;
      return std::less<_CT>()(__x.get(), __y.get());
    }

template<typename _Tp, typename _Dp>
    inline bool
    operator<(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
    { return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(__x.get(),
								 nullptr); }

template<typename _Tp, typename _Dp>
    inline bool
    operator<(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
    { return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(nullptr,
								 __x.get()); }

template<typename _Tp, typename _Dp,
	   typename _Up, typename _Ep>
    inline bool
    operator<=(const unique_ptr<_Tp, _Dp>& __x,
	       const unique_ptr<_Up, _Ep>& __y)
    { return !(__y < __x); }

template<typename _Tp, typename _Dp>
    inline bool
    operator<=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
    { return !(nullptr < __x); }

template<typename _Tp, typename _Dp>
    inline bool
    operator<=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
    { return !(__x < nullptr); }

template<typename _Tp, typename _Dp,
	   typename _Up, typename _Ep>
    inline bool
    operator>(const unique_ptr<_Tp, _Dp>& __x,
	      const unique_ptr<_Up, _Ep>& __y)
    { return (__y < __x); }

template<typename _Tp, typename _Dp>
    inline bool
    operator>(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
    { return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(nullptr,
								 __x.get()); }

template<typename _Tp, typename _Dp>
    inline bool
    operator>(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
    { return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(__x.get(),
								 nullptr); }

template<typename _Tp, typename _Dp,
	   typename _Up, typename _Ep>
    inline bool
    operator>=(const unique_ptr<_Tp, _Dp>& __x,
	       const unique_ptr<_Up, _Ep>& __y)
    { return !(__x < __y); }

template<typename _Tp, typename _Dp>
    inline bool
    operator>=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
    { return !(__x < nullptr); }

template<typename _Tp, typename _Dp>
    inline bool
    operator>=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
    { return !(nullptr < __x); }

/// std::hash specialization for unique_ptr.
  template<typename _Tp, typename _Dp>
    struct hash<unique_ptr<_Tp, _Dp>>
    : public __hash_base<size_t, unique_ptr<_Tp, _Dp>>
    {
      size_t
      operator()(const unique_ptr<_Tp, _Dp>& __u) const noexcept
      {
	typedef unique_ptr<_Tp, _Dp> _UP;
	return std::hash<typename _UP::pointer>()(__u.get());
      }
    };

#if __cplusplus > 201103L

#define __cpp_lib_make_unique 201304

template<typename _Tp>
    struct _MakeUniq
    { typedef unique_ptr<_Tp> __single_object; };

template<typename _Tp>
    struct _MakeUniq<_Tp[]>
    { typedef unique_ptr<_Tp[]> __array; };

template<typename _Tp, size_t _Bound>
    struct _MakeUniq<_Tp[_Bound]>
    { struct __invalid_type { }; };

/// std::make_unique for single objects
  template<typename _Tp, typename... _Args>
    inline typename _MakeUniq<_Tp>::__single_object
    make_unique(_Args&&... __args)
    { return unique_ptr<_Tp>(new _Tp(std::forward<_Args>(__args)...)); }

/// std::make_unique for arrays of unknown bound
  template<typename _Tp>
    inline typename _MakeUniq<_Tp>::__array
    make_unique(size_t __num)
    { return unique_ptr<_Tp>(new remove_extent_t<_Tp>[__num]()); }

/// Disable std::make_unique for arrays of known bound
  template<typename _Tp, typename... _Args>
    inline typename _MakeUniq<_Tp>::__invalid_type
    make_unique(_Args&&...) = delete;
#endif

// @} group pointer_abstractions

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif /* _UNIQUE_PTR_H */