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/usr/include/c++/8/bits/move.h

// Move, forward and identity for C++11 + swap -*- C++ -*-

// Copyright (C) 2007-2018 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/move.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{utility}
 */

#ifndef _MOVE_H
#define _MOVE_H 1

#include <bits/c++config.h>
#include <bits/concept_check.h>

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  // Used, in C++03 mode too, by allocators, etc.
  /**
   *  @brief Same as C++11 std::addressof
   *  @ingroup utilities
   */
  template<typename _Tp>
    inline _GLIBCXX_CONSTEXPR _Tp*
    __addressof(_Tp& __r) _GLIBCXX_NOEXCEPT
    { return __builtin_addressof(__r); }

#if __cplusplus >= 201103L

_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#include <type_traits> // Brings in std::declval too.

namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION

  /**
   *  @addtogroup utilities
   *  @{
   */

  /**
   *  @brief  Forward an lvalue.
   *  @return The parameter cast to the specified type.
   *
   *  This function is used to implement "perfect forwarding".
   */
  template<typename _Tp>
    constexpr _Tp&&
    forward(typename std::remove_reference<_Tp>::type& __t) noexcept
    { return static_cast<_Tp&&>(__t); }

  /**
   *  @brief  Forward an rvalue.
   *  @return The parameter cast to the specified type.
   *
   *  This function is used to implement "perfect forwarding".
   */
  template<typename _Tp>
    constexpr _Tp&&
    forward(typename std::remove_reference<_Tp>::type&& __t) noexcept
    {
      static_assert(!std::is_lvalue_reference<_Tp>::value, "template argument"
		    " substituting _Tp is an lvalue reference type");
      return static_cast<_Tp&&>(__t);
    }

  /**
   *  @brief  Convert a value to an rvalue.
   *  @param  __t  A thing of arbitrary type.
   *  @return The parameter cast to an rvalue-reference to allow moving it.
  */
  template<typename _Tp>
    constexpr typename std::remove_reference<_Tp>::type&&
    move(_Tp&& __t) noexcept
    { return static_cast<typename std::remove_reference<_Tp>::type&&>(__t); }


  template<typename _Tp>
    struct __move_if_noexcept_cond
    : public __and_<__not_<is_nothrow_move_constructible<_Tp>>,
                    is_copy_constructible<_Tp>>::type { };

  /**
   *  @brief  Conditionally convert a value to an rvalue.
   *  @param  __x  A thing of arbitrary type.
   *  @return The parameter, possibly cast to an rvalue-reference.
   *
   *  Same as std::move unless the type's move constructor could throw and the
   *  type is copyable, in which case an lvalue-reference is returned instead.
   */
  template<typename _Tp>
    constexpr typename
    conditional<__move_if_noexcept_cond<_Tp>::value, const _Tp&, _Tp&&>::type
    move_if_noexcept(_Tp& __x) noexcept
    { return std::move(__x); }

  // declval, from type_traits.

#if __cplusplus > 201402L
  // _GLIBCXX_RESOLVE_LIB_DEFECTS
  // 2296. std::addressof should be constexpr
# define __cpp_lib_addressof_constexpr 201603
#endif
  /**
   *  @brief Returns the actual address of the object or function
   *         referenced by r, even in the presence of an overloaded
   *         operator&.
   *  @param  __r  Reference to an object or function.
   *  @return   The actual address.
  */
  template<typename _Tp>
    inline _GLIBCXX17_CONSTEXPR _Tp*
    addressof(_Tp& __r) noexcept
    { return std::__addressof(__r); }

  // _GLIBCXX_RESOLVE_LIB_DEFECTS
  // 2598. addressof works on temporaries
  template<typename _Tp>
    const _Tp* addressof(const _Tp&&) = delete;

  // C++11 version of std::exchange for internal use.
  template <typename _Tp, typename _Up = _Tp>
    inline _Tp
    __exchange(_Tp& __obj, _Up&& __new_val)
    {
      _Tp __old_val = std::move(__obj);
      __obj = std::forward<_Up>(__new_val);
      return __old_val;
    }

  /// @} group utilities

#define _GLIBCXX_MOVE(__val) std::move(__val)
#define _GLIBCXX_FORWARD(_Tp, __val) std::forward<_Tp>(__val)
#else
#define _GLIBCXX_MOVE(__val) (__val)
#define _GLIBCXX_FORWARD(_Tp, __val) (__val)
#endif

  /**
   *  @addtogroup utilities
   *  @{
   */

  /**
   *  @brief Swaps two values.
   *  @param  __a  A thing of arbitrary type.
   *  @param  __b  Another thing of arbitrary type.
   *  @return   Nothing.
  */
  template<typename _Tp>
    inline
#if __cplusplus >= 201103L
    typename enable_if<__and_<__not_<__is_tuple_like<_Tp>>,
			      is_move_constructible<_Tp>,
			      is_move_assignable<_Tp>>::value>::type
    swap(_Tp& __a, _Tp& __b)
    noexcept(__and_<is_nothrow_move_constructible<_Tp>,
	            is_nothrow_move_assignable<_Tp>>::value)
#else
    void
    swap(_Tp& __a, _Tp& __b)
#endif
    {
      // concept requirements
      __glibcxx_function_requires(_SGIAssignableConcept<_Tp>)

      _Tp __tmp = _GLIBCXX_MOVE(__a);
      __a = _GLIBCXX_MOVE(__b);
      __b = _GLIBCXX_MOVE(__tmp);
    }

  // _GLIBCXX_RESOLVE_LIB_DEFECTS
  // DR 809. std::swap should be overloaded for array types.
  /// Swap the contents of two arrays.
  template<typename _Tp, size_t _Nm>
    inline
#if __cplusplus >= 201103L
    typename enable_if<__is_swappable<_Tp>::value>::type
    swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
    noexcept(__is_nothrow_swappable<_Tp>::value)
#else
    void
    swap(_Tp (&__a)[_Nm], _Tp (&__b)[_Nm])
#endif
    {
      for (size_t __n = 0; __n < _Nm; ++__n)
	swap(__a[__n], __b[__n]);
    }

  /// @} group utilities
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace

#endif /* _MOVE_H */

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Name	Size	Perms	Modified	Actions
algorithmfwd.h	21.23 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
allocated_ptr.h	3.22 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
allocator.h	7.39 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
alloc_traits.h	19.60 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
atomic_base.h	23.28 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
atomic_futex.h	9.35 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
atomic_lockfree_defines.h	2.20 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
basic_ios.h	15.70 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
basic_ios.tcc	5.94 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
basic_string.h	237.01 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
basic_string.tcc	52.50 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
boost_concept_check.h	26.52 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
c++0x_warning.h	1.44 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
char_traits.h	20.42 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
codecvt.h	20.79 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
concept_check.h	3.34 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
cpp_type_traits.h	9.56 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
cxxabi_forced.h	1.77 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
cxxabi_init_exception.h	2.17 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
deque.tcc	33.32 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
enable_special_members.h	12.10 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
exception.h	2.23 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
exception_defines.h	1.61 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
exception_ptr.h	5.84 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
forward_list.h	47.77 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
forward_list.tcc	12.86 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
fstream.tcc	32.03 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
fs_dir.h	14.38 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
fs_fwd.h	10.04 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
fs_ops.h	9.50 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
fs_path.h	32.12 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
functexcept.h	3.18 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
functional_hash.h	8.04 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
gslice.h	5.39 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
gslice_array.h	7.59 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
hashtable.h	72.06 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
hashtable_policy.h	66.38 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
hash_bytes.h	2.10 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
indirect_array.h	7.68 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
invoke.h	3.57 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
ios_base.h	30.30 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
istream.tcc	30.36 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
list.tcc	15.60 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
localefwd.h	5.51 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
locale_classes.h	24.31 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
locale_classes.tcc	8.18 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
locale_conv.h	15.72 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
locale_facets.h	90.16 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
locale_facets.tcc	38.62 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
locale_facets_nonio.h	67.36 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
locale_facets_nonio.tcc	44.22 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
mask_array.h	7.42 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
memoryfwd.h	2.40 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
move.h	6.38 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
nested_exception.h	4.69 KB	lrw-r--r--	2025-08-26 09:45:07	Edit Download recursive recursive
node_handle.h	8.02 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
ostream.tcc	12.03 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
ostream_insert.h	3.91 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
parse_numbers.h	7.76 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
postypes.h	8.02 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
predefined_ops.h	8.87 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
ptr_traits.h	6.47 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
quoted_string.h	4.93 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
random.h	171.14 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
random.tcc	103.12 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
range_access.h	9.79 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
refwrap.h	11.61 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex.h	95.12 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex.tcc	16.18 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_automaton.h	10.47 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_automaton.tcc	7.65 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_compiler.h	17.63 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_compiler.tcc	18.84 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_constants.h	14.36 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_error.h	4.79 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_executor.h	7.31 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_executor.tcc	18.40 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_scanner.h	6.92 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
regex_scanner.tcc	14.66 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
shared_ptr.h	22.88 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
shared_ptr_atomic.h	9.54 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
shared_ptr_base.h	53.01 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
slice_array.h	9.13 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
specfun.h	45.95 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
sstream.tcc	9.90 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
std_abs.h	3.19 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
std_function.h	22.71 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
std_mutex.h	9.08 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_algo.h	209.27 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_algobase.h	49.31 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_bvector.h	32.94 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_construct.h	7.22 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_deque.h	76.73 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_function.h	40.77 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_heap.h	19.73 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_iterator.h	41.30 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_iterator_base_funcs.h	7.99 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_iterator_base_types.h	8.48 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_list.h	65.97 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_map.h	51.55 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_multimap.h	40.58 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_multiset.h	34.97 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_numeric.h	13.51 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_pair.h	18.21 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_queue.h	23.51 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_raw_storage_iter.h	3.74 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_relops.h	4.49 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_set.h	35.28 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_stack.h	11.66 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_tempbuf.h	8.15 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_tree.h	73.15 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_uninitialized.h	27.06 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stl_vector.h	59.12 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
streambuf.tcc	4.81 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
streambuf_iterator.h	13.44 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stream_iterator.h	6.50 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
stringfwd.h	2.55 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
string_view.tcc	6.54 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
uniform_int_dist.h	9.84 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
unique_ptr.h	25.38 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
unordered_map.h	73.58 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
unordered_set.h	57.76 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
uses_allocator.h	6.37 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
valarray_after.h	22.12 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
valarray_array.h	21.30 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
valarray_array.tcc	7.08 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
valarray_before.h	18.08 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive
vector.tcc	28.95 KB	lrw-r--r--	2025-08-26 09:45:00	Edit Download recursive recursive