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re PR libstdc++/59872 (Cannot move std::map with move-only mapped_type) 

PR libstdc++/59872
	* include/bits/stl_map.h (map::operator=(map&&)): Fix comment.
	* include/bits/stl_multimap.h (multimap::operator=(multimap&&)):
	Likewise.
	* include/bits/stl_multiset.h (multiset::operator=(multiset&&)):
	Likewise.
	* include/bits/stl_set.h (set::operator=(set&&)): Likewise.
	* include/bits/stl_tree.h (_Rb_tree::_M_move_data): New overloaded
	functions to perform moving or copying of elements from rvalue tree.
	(_Rb_tree::_Rb_tree(_Rb_tree&&)): Use _M_move_data.
	(_Rb_tree::_Rb_tree(_Rb_tree&&, _Node_allocator&&)): Likewise.
	* testsuite/23_containers/map/59872.cc: New.
	* testsuite/23_containers/map/56613.cc: Remove duplicate include.

From-SVN: r206994
This commit is contained in:
Jonathan Wakely 2014-01-23 17:17:04 +00:00 committed by Jonathan Wakely
parent ea0f1fc8e4
commit 6a5839c841
8 changed files with 114 additions and 47 deletions
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14
libstdc++-v3/ChangeLog
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@ -3,6 +3,20 @@
* doc/xml/faq.xml (a-how_to_set_paths): Expand FAQ answer.
* doc/xml/manual/abi.xml (abi.versioning.history): Correct symver.
PR libstdc++/59872
* include/bits/stl_map.h (map::operator=(map&&)): Fix comment.
* include/bits/stl_multimap.h (multimap::operator=(multimap&&)):
Likewise.
* include/bits/stl_multiset.h (multiset::operator=(multiset&&)):
Likewise.
* include/bits/stl_set.h (set::operator=(set&&)): Likewise.
* include/bits/stl_tree.h (_Rb_tree::_M_move_data): New overloaded
functions to perform moving or copying of elements from rvalue tree.
(_Rb_tree::_Rb_tree(_Rb_tree&&)): Use _M_move_data.
(_Rb_tree::_Rb_tree(_Rb_tree&&, _Node_allocator&&)): Likewise.
* testsuite/23_containers/map/59872.cc: New.
* testsuite/23_containers/map/56613.cc: Remove duplicate include.
2014-01-22 Jonathan Wakely <jwakely@redhat.com>
* include/bits/stl_deque.h (_Deque_impl): Move comment.

5
libstdc++-v3/include/bits/stl_map.h
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@ -301,8 +301,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
* @brief %Map move assignment operator.
* @param __x A %map of identical element and allocator types.
*
* The contents of @a __x are moved into this map (without copying).
* @a __x is a valid, but unspecified %map.
* The contents of @a __x are moved into this map (without copying
* if the allocators compare equal or get moved on assignment).
* Afterwards @a __x is in a valid, but unspecified state.
*/
map&
operator=(map&& __x) noexcept(_Alloc_traits::_S_nothrow_move())

5
libstdc++-v3/include/bits/stl_multimap.h
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@ -295,8 +295,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
* @brief %Multimap move assignment operator.
* @param __x A %multimap of identical element and allocator types.
*
* The contents of @a __x are moved into this multimap (without copying).
* @a __x is a valid, but unspecified multimap.
* The contents of @a __x are moved into this multimap (without copying
* if the allocators compare equal or get moved on assignment).
* Afterwards @a __x is in a valid, but unspecified state.
*/
multimap&
operator=(multimap&& __x) noexcept(_Alloc_traits::_S_nothrow_move())

6
libstdc++-v3/include/bits/stl_multiset.h
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@ -267,9 +267,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
* @brief %Multiset move assignment operator.
* @param __x A %multiset of identical element and allocator types.
*
* The contents of @a __x are moved into this %multiset
* (without copying). @a __x is a valid, but unspecified
* %multiset.
* The contents of @a __x are moved into this %multiset (without
* copying if the allocators compare equal or get moved on assignment).
* Afterwards @a __x is in a valid, but unspecified state.
*/
multiset&
operator=(multiset&& __x) noexcept(_Alloc_traits::_S_nothrow_move())

5
libstdc++-v3/include/bits/stl_set.h
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@ -271,8 +271,9 @@ _GLIBCXX_BEGIN_NAMESPACE_CONTAINER
* @brief %Set move assignment operator.
* @param __x A %set of identical element and allocator types.
*
* The contents of @a __x are moved into this %set (without copying).
* @a __x is a valid, but unspecified %set.
* The contents of @a __x are moved into this %set (without copying
* if the allocators compare equal or get moved on assignment).
* Afterwards @a __x is in a valid, but unspecified state.
*/
set&
operator=(set&& __x) noexcept(_Alloc_traits::_S_nothrow_move())

89
libstdc++-v3/include/bits/stl_tree.h
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@ -698,8 +698,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
_Rb_tree(_Rb_tree&& __x)
: _Rb_tree(std::move(__x), std::move(__x._M_get_Node_allocator()))
{ }
: _M_impl(__x._M_impl._M_key_compare, __x._M_get_Node_allocator())
{
if (__x._M_root() != 0)
_M_move_data(__x, std::true_type());
}
_Rb_tree(_Rb_tree&& __x, const allocator_type& __a)
: _Rb_tree(std::move(__x), _Node_allocator(__a))
@ -948,6 +951,16 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#if __cplusplus >= 201103L
bool
_M_move_assign(_Rb_tree&);
private:
// Move elements from container with equal allocator.
void
_M_move_data(_Rb_tree&, std::true_type);
// Move elements from container with possibly non-equal allocator,
// which might result in a copy not a move.
void
_M_move_data(_Rb_tree&, std::false_type);
#endif
};
@ -1013,30 +1026,44 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_Rb_tree(_Rb_tree&& __x, _Node_allocator&& __a)
: _M_impl(__x._M_impl._M_key_compare, std::move(__a))
{
using __eq = integral_constant<bool, _Alloc_traits::_S_always_equal()>;
if (__x._M_root() != 0)
_M_move_data(__x, __eq());
}
template<typename _Key, typename _Val, typename _KeyOfValue,
typename _Compare, typename _Alloc>
void
_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::
_M_move_data(_Rb_tree& __x, std::true_type)
{
_M_root() = __x._M_root();
_M_leftmost() = __x._M_leftmost();
_M_rightmost() = __x._M_rightmost();
_M_root()->_M_parent = _M_end();
__x._M_root() = 0;
__x._M_leftmost() = __x._M_end();
__x._M_rightmost() = __x._M_end();
this->_M_impl._M_node_count = __x._M_impl._M_node_count;
__x._M_impl._M_node_count = 0;
}
template<typename _Key, typename _Val, typename _KeyOfValue,
typename _Compare, typename _Alloc>
void
_Rb_tree<_Key, _Val, _KeyOfValue, _Compare, _Alloc>::
_M_move_data(_Rb_tree& __x, std::false_type)
{
if (_M_get_Node_allocator() == __x._M_get_Node_allocator())
_M_move_data(__x, std::true_type());
else
{
if (!_Alloc_traits::_S_always_equal()
&& __x._M_get_Node_allocator() != __a)
{
_M_root() = _M_copy(__x._M_begin(), _M_end());
_M_leftmost() = _S_minimum(_M_root());
_M_rightmost() = _S_maximum(_M_root());
_M_impl._M_node_count = __x._M_impl._M_node_count;
}
else
{
_M_root() = __x._M_root();
_M_leftmost() = __x._M_leftmost();
_M_rightmost() = __x._M_rightmost();
_M_root()->_M_parent = _M_end();
__x._M_root() = 0;
__x._M_leftmost() = __x._M_end();
__x._M_rightmost() = __x._M_end();
this->_M_impl._M_node_count = __x._M_impl._M_node_count;
__x._M_impl._M_node_count = 0;
}
_M_root() = _M_copy(__x._M_begin(), _M_end());
_M_leftmost() = _S_minimum(_M_root());
_M_rightmost() = _S_maximum(_M_root());
_M_impl._M_node_count = __x._M_impl._M_node_count;
}
}
@ -1052,19 +1079,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
clear();
if (__x._M_root() != 0)
{
_M_root() = __x._M_root();
_M_leftmost() = __x._M_leftmost();
_M_rightmost() = __x._M_rightmost();
_M_root()->_M_parent = _M_end();
__x._M_root() = 0;
__x._M_leftmost() = __x._M_end();
__x._M_rightmost() = __x._M_end();
this->_M_impl._M_node_count = __x._M_impl._M_node_count;
__x._M_impl._M_node_count = 0;
}
_M_move_data(__x, std::true_type());
if (_Alloc_traits::_S_propagate_on_move_assign())
std::__alloc_on_move(_M_get_Node_allocator(),
__x._M_get_Node_allocator());

1
libstdc++-v3/testsuite/23_containers/map/56613.cc
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@ -24,7 +24,6 @@
// { dg-options "-std=gnu++11" }
// libstdc++/56613
#include <map>
// A conforming C++03 allocator, should still work in C++11 mode.
template<typename T>

36
libstdc++-v3/testsuite/23_containers/map/59872.cc Normal file
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@ -0,0 +1,36 @@
// Copyright (C) 2014 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.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// { dg-do compile }
// { dg-options "-std=gnu++11" }
// libstdc++/59872
#include <map>
struct MoveOnly
{
MoveOnly() = default;
MoveOnly(MoveOnly&&) = default;
MoveOnly(const MoveOnly&) = delete;
};
using test_type = std::map<int, MoveOnly>;
test_type p;
test_type q(std::move(p));
test_type r(std::move(p), test_type::allocator_type());