list.tcc
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// List implementation (out of line) -*- C++ -*-
// Copyright (C) 2001-2019 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/>.
/*
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Hewlett-Packard Company makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*
* Copyright (c) 1996,1997
* Silicon Graphics Computer Systems, Inc.
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
/** @file bits/list.tcc
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{list}
*/
#ifndef _LIST_TCC
#define _LIST_TCC 1
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
_GLIBCXX_BEGIN_NAMESPACE_CONTAINER
template<typename _Tp, typename _Alloc>
void
_List_base<_Tp, _Alloc>::
_M_clear() _GLIBCXX_NOEXCEPT
{
typedef _List_node<_Tp> _Node;
__detail::_List_node_base* __cur = _M_impl._M_node._M_next;
while (__cur != &_M_impl._M_node)
{
_Node* __tmp = static_cast<_Node*>(__cur);
__cur = __tmp->_M_next;
_Tp* __val = __tmp->_M_valptr();
#if __cplusplus >= 201103L
_Node_alloc_traits::destroy(_M_get_Node_allocator(), __val);
#else
_Tp_alloc_type(_M_get_Node_allocator()).destroy(__val);
#endif
_M_put_node(__tmp);
}
}
#if __cplusplus >= 201103L
template<typename _Tp, typename _Alloc>
template<typename... _Args>
typename list<_Tp, _Alloc>::iterator
list<_Tp, _Alloc>::
emplace(const_iterator __position, _Args&&... __args)
{
_Node* __tmp = _M_create_node(std::forward<_Args>(__args)...);
__tmp->_M_hook(__position._M_const_cast()._M_node);
this->_M_inc_size(1);
return iterator(__tmp);
}
#endif
template<typename _Tp, typename _Alloc>
typename list<_Tp, _Alloc>::iterator
list<_Tp, _Alloc>::
#if __cplusplus >= 201103L
insert(const_iterator __position, const value_type& __x)
#else
insert(iterator __position, const value_type& __x)
#endif
{
_Node* __tmp = _M_create_node(__x);
__tmp->_M_hook(__position._M_const_cast()._M_node);
this->_M_inc_size(1);
return iterator(__tmp);
}
#if __cplusplus >= 201103L
template<typename _Tp, typename _Alloc>
typename list<_Tp, _Alloc>::iterator
list<_Tp, _Alloc>::
insert(const_iterator __position, size_type __n, const value_type& __x)
{
if (__n)
{
list __tmp(__n, __x, get_allocator());
iterator __it = __tmp.begin();
splice(__position, __tmp);
return __it;
}
return __position._M_const_cast();
}
template<typename _Tp, typename _Alloc>
template<typename _InputIterator, typename>
typename list<_Tp, _Alloc>::iterator
list<_Tp, _Alloc>::
insert(const_iterator __position, _InputIterator __first,
_InputIterator __last)
{
list __tmp(__first, __last, get_allocator());
if (!__tmp.empty())
{
iterator __it = __tmp.begin();
splice(__position, __tmp);
return __it;
}
return __position._M_const_cast();
}
#endif
template<typename _Tp, typename _Alloc>
typename list<_Tp, _Alloc>::iterator
list<_Tp, _Alloc>::
#if __cplusplus >= 201103L
erase(const_iterator __position) noexcept
#else
erase(iterator __position)
#endif
{
iterator __ret = iterator(__position._M_node->_M_next);
_M_erase(__position._M_const_cast());
return __ret;
}
// Return a const_iterator indicating the position to start inserting or
// erasing elements (depending whether the list is growing or shrinking),
// and set __new_size to the number of new elements that must be appended.
// Equivalent to the following, but performed optimally:
// if (__new_size < size()) {
// __new_size = 0;
// return std::next(begin(), __new_size);
// } else {
// __newsize -= size();
// return end();
// }
template<typename _Tp, typename _Alloc>
typename list<_Tp, _Alloc>::const_iterator
list<_Tp, _Alloc>::
_M_resize_pos(size_type& __new_size) const
{
const_iterator __i;
#if _GLIBCXX_USE_CXX11_ABI
const size_type __len = size();
if (__new_size < __len)
{
if (__new_size <= __len / 2)
{
__i = begin();
std::advance(__i, __new_size);
}
else
{
__i = end();
ptrdiff_t __num_erase = __len - __new_size;
std::advance(__i, -__num_erase);
}
__new_size = 0;
return __i;
}
else
__i = end();
#else
size_type __len = 0;
for (__i = begin(); __i != end() && __len < __new_size; ++__i, ++__len)
;
#endif
__new_size -= __len;
return __i;
}
#if __cplusplus >= 201103L
template<typename _Tp, typename _Alloc>
void
list<_Tp, _Alloc>::
_M_default_append(size_type __n)
{
size_type __i = 0;
__try
{
for (; __i < __n; ++__i)
emplace_back();
}
__catch(...)
{
for (; __i; --__i)
pop_back();
__throw_exception_again;
}
}
template<typename _Tp, typename _Alloc>
void
list<_Tp, _Alloc>::
resize(size_type __new_size)
{
const_iterator __i = _M_resize_pos(__new_size);
if (__new_size)
_M_default_append(__new_size);
else
erase(__i, end());
}
template<typename _Tp, typename _Alloc>
void
list<_Tp, _Alloc>::
resize(size_type __new_size, const value_type& __x)
{
const_iterator __i = _M_resize_pos(__new_size);
if (__new_size)
insert(end(), __new_size, __x);
else
erase(__i, end());
}
#else
template<typename _Tp, typename _Alloc>
void
list<_Tp, _Alloc>::
resize(size_type __new_size, value_type __x)
{
const_iterator __i = _M_resize_pos(__new_size);
if (__new_size)
insert(end(), __new_size, __x);
else
erase(__i._M_const_cast(), end());
}
#endif
template<typename _Tp, typename _Alloc>
list<_Tp, _Alloc>&
list<_Tp, _Alloc>::
operator=(const list& __x)
{
if (this != std::__addressof(__x))
{
#if __cplusplus >= 201103L
if (_Node_alloc_traits::_S_propagate_on_copy_assign())
{
auto& __this_alloc = this->_M_get_Node_allocator();
auto& __that_alloc = __x._M_get_Node_allocator();
if (!_Node_alloc_traits::_S_always_equal()
&& __this_alloc != __that_alloc)
{
// replacement allocator cannot free existing storage
clear();
}
std::__alloc_on_copy(__this_alloc, __that_alloc);
}
#endif
_M_assign_dispatch(__x.begin(), __x.end(), __false_type());
}
return *this;
}
template<typename _Tp, typename _Alloc>
void
list<_Tp, _Alloc>::
_M_fill_assign(size_type __n, const value_type& __val)
{
iterator __i = begin();
for (; __i != end() && __n > 0; ++__i, --__n)
*__i = __val;
if (__n > 0)
insert(end(), __n, __val);
else
erase(__i, end());
}
template<typename _Tp, typename _Alloc>
template <typename _InputIterator>
void
list<_Tp, _Alloc>::
_M_assign_dispatch(_InputIterator __first2, _InputIterator __last2,
__false_type)
{
iterator __first1 = begin();
iterator __last1 = end();
for (; __first1 != __last1 && __first2 != __last2;
++__first1, (void)++__first2)
*__first1 = *__first2;
if (__first2 == __last2)
erase(__first1, __last1);
else
insert(__last1, __first2, __last2);
}
#if __cplusplus > 201703L
# define _GLIBCXX20_ONLY(__expr) __expr
#else
# define _GLIBCXX20_ONLY(__expr)
#endif
template<typename _Tp, typename _Alloc>
typename list<_Tp, _Alloc>::__remove_return_type
list<_Tp, _Alloc>::
remove(const value_type& __value)
{
size_type __removed __attribute__((__unused__)) = 0;
iterator __first = begin();
iterator __last = end();
iterator __extra = __last;
while (__first != __last)
{
iterator __next = __first;
++__next;
if (*__first == __value)
{
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 526. Is it undefined if a function in the standard changes
// in parameters?
if (std::__addressof(*__first) != std::__addressof(__value))
{
_M_erase(__first);
_GLIBCXX20_ONLY( __removed++ );
}
else
__extra = __first;
}
__first = __next;
}
if (__extra != __last)
{
_M_erase(__extra);
_GLIBCXX20_ONLY( __removed++ );
}
return _GLIBCXX20_ONLY( __removed );
}
template<typename _Tp, typename _Alloc>
typename list<_Tp, _Alloc>::__remove_return_type
list<_Tp, _Alloc>::
unique()
{
iterator __first = begin();
iterator __last = end();
if (__first == __last)
return _GLIBCXX20_ONLY( 0 );
size_type __removed __attribute__((__unused__)) = 0;
iterator __next = __first;
while (++__next != __last)
{
if (*__first == *__next)
{
_M_erase(__next);
_GLIBCXX20_ONLY( __removed++ );
}
else
__first = __next;
__next = __first;
}
return _GLIBCXX20_ONLY( __removed );
}
template<typename _Tp, typename _Alloc>
void
list<_Tp, _Alloc>::
#if __cplusplus >= 201103L
merge(list&& __x)
#else
merge(list& __x)
#endif
{
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 300. list::merge() specification incomplete
if (this != std::__addressof(__x))
{
_M_check_equal_allocators(__x);
iterator __first1 = begin();
iterator __last1 = end();
iterator __first2 = __x.begin();
iterator __last2 = __x.end();
const size_t __orig_size = __x.size();
__try {
while (__first1 != __last1 && __first2 != __last2)
if (*__first2 < *__first1)
{
iterator __next = __first2;
_M_transfer(__first1, __first2, ++__next);
__first2 = __next;
}
else
++__first1;
if (__first2 != __last2)
_M_transfer(__last1, __first2, __last2);
this->_M_inc_size(__x._M_get_size());
__x._M_set_size(0);
}
__catch(...)
{
const size_t __dist = std::distance(__first2, __last2);
this->_M_inc_size(__orig_size - __dist);
__x._M_set_size(__dist);
__throw_exception_again;
}
}
}
template<typename _Tp, typename _Alloc>
template <typename _StrictWeakOrdering>
void
list<_Tp, _Alloc>::
#if __cplusplus >= 201103L
merge(list&& __x, _StrictWeakOrdering __comp)
#else
merge(list& __x, _StrictWeakOrdering __comp)
#endif
{
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// 300. list::merge() specification incomplete
if (this != std::__addressof(__x))
{
_M_check_equal_allocators(__x);
iterator __first1 = begin();
iterator __last1 = end();
iterator __first2 = __x.begin();
iterator __last2 = __x.end();
const size_t __orig_size = __x.size();
__try
{
while (__first1 != __last1 && __first2 != __last2)
if (__comp(*__first2, *__first1))
{
iterator __next = __first2;
_M_transfer(__first1, __first2, ++__next);
__first2 = __next;
}
else
++__first1;
if (__first2 != __last2)
_M_transfer(__last1, __first2, __last2);
this->_M_inc_size(__x._M_get_size());
__x._M_set_size(0);
}
__catch(...)
{
const size_t __dist = std::distance(__first2, __last2);
this->_M_inc_size(__orig_size - __dist);
__x._M_set_size(__dist);
__throw_exception_again;
}
}
}
template<typename _Tp, typename _Alloc>
void
list<_Tp, _Alloc>::
sort()
{
// Do nothing if the list has length 0 or 1.
if (this->_M_impl._M_node._M_next != &this->_M_impl._M_node
&& this->_M_impl._M_node._M_next->_M_next != &this->_M_impl._M_node)
{
list __carry;
list __tmp[64];
list * __fill = __tmp;
list * __counter;
__try
{
do
{
__carry.splice(__carry.begin(), *this, begin());
for(__counter = __tmp;
__counter != __fill && !__counter->empty();
++__counter)
{
__counter->merge(__carry);
__carry.swap(*__counter);
}
__carry.swap(*__counter);
if (__counter == __fill)
++__fill;
}
while ( !empty() );
for (__counter = __tmp + 1; __counter != __fill; ++__counter)
__counter->merge(*(__counter - 1));
swap( *(__fill - 1) );
}
__catch(...)
{
this->splice(this->end(), __carry);
for (int __i = 0; __i < sizeof(__tmp)/sizeof(__tmp[0]); ++__i)
this->splice(this->end(), __tmp[__i]);
__throw_exception_again;
}
}
}
template<typename _Tp, typename _Alloc>
template <typename _Predicate>
typename list<_Tp, _Alloc>::__remove_return_type
list<_Tp, _Alloc>::
remove_if(_Predicate __pred)
{
size_type __removed __attribute__((__unused__)) = 0;
iterator __first = begin();
iterator __last = end();
while (__first != __last)
{
iterator __next = __first;
++__next;
if (__pred(*__first))
{
_M_erase(__first);
_GLIBCXX20_ONLY( __removed++ );
}
__first = __next;
}
return _GLIBCXX20_ONLY( __removed );
}
template<typename _Tp, typename _Alloc>
template <typename _BinaryPredicate>
typename list<_Tp, _Alloc>::__remove_return_type
list<_Tp, _Alloc>::
unique(_BinaryPredicate __binary_pred)
{
iterator __first = begin();
iterator __last = end();
if (__first == __last)
return _GLIBCXX20_ONLY(0);
size_type __removed __attribute__((__unused__)) = 0;
iterator __next = __first;
while (++__next != __last)
{
if (__binary_pred(*__first, *__next))
{
_M_erase(__next);
_GLIBCXX20_ONLY( __removed++ );
}
else
__first = __next;
__next = __first;
}
return _GLIBCXX20_ONLY( __removed );
}
#undef _GLIBCXX20_ONLY
template<typename _Tp, typename _Alloc>
template <typename _StrictWeakOrdering>
void
list<_Tp, _Alloc>::
sort(_StrictWeakOrdering __comp)
{
// Do nothing if the list has length 0 or 1.
if (this->_M_impl._M_node._M_next != &this->_M_impl._M_node
&& this->_M_impl._M_node._M_next->_M_next != &this->_M_impl._M_node)
{
list __carry;
list __tmp[64];
list * __fill = __tmp;
list * __counter;
__try
{
do
{
__carry.splice(__carry.begin(), *this, begin());
for(__counter = __tmp;
__counter != __fill && !__counter->empty();
++__counter)
{
__counter->merge(__carry, __comp);
__carry.swap(*__counter);
}
__carry.swap(*__counter);
if (__counter == __fill)
++__fill;
}
while ( !empty() );
for (__counter = __tmp + 1; __counter != __fill; ++__counter)
__counter->merge(*(__counter - 1), __comp);
swap(*(__fill - 1));
}
__catch(...)
{
this->splice(this->end(), __carry);
for (int __i = 0; __i < sizeof(__tmp)/sizeof(__tmp[0]); ++__i)
this->splice(this->end(), __tmp[__i]);
__throw_exception_again;
}
}
}
_GLIBCXX_END_NAMESPACE_CONTAINER
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std
#endif /* _LIST_TCC */
std::__addressof
constexpr _Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
Definition: move.h:47
std
ISO C++ entities toplevel namespace is std.
std::begin
constexpr const _Tp * begin(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to the first element of the initializer_list.
Definition: initializer_list:89
std::end
constexpr const _Tp * end(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to one past the last element of the initializer_list.
Definition: initializer_list:99
std::distance
_GLIBCXX17_CONSTEXPR iterator_traits< _InputIterator >::difference_type distance(_InputIterator __first, _InputIterator __last)
A generalization of pointer arithmetic.
Definition: stl_iterator_base_funcs.h:138
std::advance
_GLIBCXX17_CONSTEXPR void advance(_InputIterator &__i, _Distance __n)
A generalization of pointer arithmetic.
Definition: stl_iterator_base_funcs.h:202
std::_List_iterator
A list::iterator.
Definition: stl_list.h:186
std::_List_const_iterator
A list::const_iterator.
Definition: stl_list.h:265
std::iterator
Common iterator class.
Definition: stl_iterator_base_types.h:119
std::_List_node
An actual node in the list.
Definition: stl_list.h:167
std::list
A standard container with linear time access to elements, and fixed time insertion/deletion at any po...
Definition: stl_list.h:553
std::list::resize
void resize(size_type __new_size)
Resizes the list to the specified number of elements.
Definition: list.tcc:231
std::list::insert
iterator insert(const_iterator __position, const value_type &__x)
Inserts given value into list before specified iterator.
Definition: list.tcc:103
std::list::sort
void sort()
Sort the elements.
Definition: list.tcc:487
std::list::begin
iterator begin() noexcept
Definition: stl_list.h:941
std::list::emplace
iterator emplace(const_iterator __position, _Args &&... __args)
Constructs object in list before specified iterator.
Definition: list.tcc:90
std::list::operator=
list & operator=(const list &__x)
List assignment operator.
Definition: list.tcc:268
std::list::unique
__remove_return_type unique()
Remove consecutive duplicate elements.
Definition: list.tcc:368
std::list::size
size_type size() const noexcept
Definition: stl_list.h:1056
std::list::merge
void merge(list &&__x)
Merge sorted lists.
Definition: list.tcc:394
std::list::remove
__remove_return_type remove(const _Tp &__value)
Remove all elements equal to value.
Definition: list.tcc:332
std::list::remove_if
__remove_return_type remove_if(_Predicate)
Remove all elements satisfying a predicate.
Definition: list.tcc:534
std::list::end
iterator end() noexcept
Definition: stl_list.h:959
std::list::empty
_GLIBCXX_NODISCARD bool empty() const noexcept
Definition: stl_list.h:1051
std::list::splice
void splice(const_iterator __position, list &&__x) noexcept
Insert contents of another list.
Definition: stl_list.h:1514
std::list::swap
void swap(list &__x) noexcept
Swaps data with another list.
Definition: stl_list.h:1474