_M_insert
iterator _M_insert(_Base_ptr __x, _Base_ptr __y, const value_type& __v);
return _M_insert(__x, __y, __v);
return pair<iterator,bool>(_M_insert(__x, __y, __v), true);
return pair<iterator,bool>(_M_insert(__x, __y, __v), true);
return _M_insert(__position._M_node, __position._M_node, __v);
return _M_insert(0, _M_rightmost(), __v);
return _M_insert(0, __before._M_node, __v);
return _M_insert(__position._M_node, __position._M_node, __v);
return _M_insert(__position._M_node, __position._M_node, __v);
return _M_insert(0, _M_rightmost(), __v);
return _M_insert(0, __before._M_node, __v);
return _M_insert(__position._M_node, __position._M_node, __v);