|
_a) _GLIBCXX_NOEXCEPT
: _Base(_Node_alloc_type(__a)) { }
#if __cplusplus >= 201103L
/**
* @brief Creates a %list with default constructed elements.
* @param __n The number of elements to initially create.
*
* This constructor fills the %list with @a __n default
* constructed elements.
*/
explicit
list(size_type __n)
: _Base()
{ _M_default_initialize(__n); }
/**
* @brief Creates a %list with copies of an exemplar element.
* @param __n The number of elements to initially create.
* @param __value An element to copy.
* @param __a An allocator object.
*
* This constructor fills the %list with @a __n copies of @a __value.
*/
list(size_type __n, const value_type& __value,
const allocator_type& __a = allocator_type())
: _Base(_Node_alloc_type(__a))
{ _M_fill_initialize(__n, __value); }
#else
/**
* @brief Creates a %list with copies of an exemplar element.
* @param __n The number of elements to initially create.
* @param __value An element to copy.
* @param __a An allocator object.
*
* This constructor fills the %list with @a __n copies of @a __value.
*/
explicit
list(size_type __n, const value_type& __value = value_type(),
const allocator_type& __a = allocator_type())
: _Base(_Node_alloc_type(__a))
{ _M_fill_initialize(__n, __value); }
#endif
/**
* @brief %List copy constructor.
* @param __x A %list of identical element and allocator types.
*
* The newly-created %list uses a copy of the allocation object used
* by @a __x.
*/
list(const list& __x)
: _Base(__x._M_get_Node_allocator())
{ _M_initialize_dispatch(__x.begin(), __x.end(), __false_type()); }
#if __cplusplus >= 201103L
/**
* @brief %List move constructor.
* @param __x A %list of identical element and allocator types.
*
* The newly-created %list contains the exact contents of @a __x.
* The contents of @a __x are a valid, but unspecified %list.
*/
list(list&& __x) noexcept
: _Base(std::move(__x)) { }
/**
* @brief Builds a %list from an initializer_list
* @param __l An initializer_list of value_type.
* @param __a An allocator object.
*
* Create a %list consisting of copies of the elements in the
* initializer_list @a __l. This is linear in __l.size().
*/
list(initializer_list<value_type> __l,
const allocator_type& __a = allocator_type())
: _Base(_Node_alloc_type(__a))
{ _M_initialize_dispatch(__l.begin(), __l.end(), __false_type()); }
#endif
/**
* @brief Builds a %list from a range.
* @param __first An input iterator.
* @param __last An input iterator.
* @param __a An allocator object.
*
* Create a %list consisting of copies of the elements from
* [@a __first,@a __last). This is linear in N (where N is
* distance(@a __first,@a __last)).
*/
#if __cplusplus >= 201103L
template<typename _InputIterator,
typename = std::_RequireInputIter<_InputIterator>>
list(_InputIterator __first, _InputIterator __last,
const allocator_type& __a = allocator_type())
: _Base(_Node_alloc_type(__a))
{ _M_initialize_dispatch(__first, __last, __false_type()); }
#else
4. 运算符重载
移动赋值运算符
list&
operator=(list&& __x) //移动赋值运算符
{
// NB: DR 1204.
// NB: DR 675.
this->clear();
this->swap(__x);
return *this;
}
初始化列表
这是 list 类的赋值运算符重载，它允许使用初始化列表来为 list 对象赋值。
该运算符重载接受一个初始化列表 __l，它将 __l 中的元素赋值给当前的 list 对象。具体地，它调用 assign 函数，该函数接受两个迭代器参数，分别指向初始化列表的第一个元素和最后一个元素。assign 函数用这些元素来替换当前 list 对象中的元素。
该运算符重载返回一 |