_S_apply_to_pieces
if (!_S_apply_to_pieces(__c, __left, __begin, __left_end))
if (!_S_apply_to_pieces(__c, __right,
_S_apply_to_pieces(__c, __r, __start, __start + __len);
_S_apply_to_pieces(__c, _M_tree_ptr, __start, size());
static bool _S_apply_to_pieces(
_S_apply_to_pieces(__c, _M_tree_ptr, __begin, __end);