_S_eos
__buffer[__prefix->_M_size] = _S_eos((_CharT*)0);
_S_empty_c_str[0] = _S_eos((_CharT*)0); // Possibly redundant,
__result[__s] = _S_eos((_CharT*)0);
_S_empty_c_str[0] = _S_eos((_CharT*)0);
__result[__s] = _S_eos((_CharT*)0);
static bool _S_is0(_CharT __c) { return __c == _S_eos((_CharT*)0); }