23template<
typename C,
typename T>
28#ifdef _GLIBCXX_USE_C99_STDINT_TR1
29using check3_t = std::u16string_view;
30using check4_t = std::u32string_view;
33#ifdef _GLIBCXX_USE_WCHAR_T
34using check5_t = std::wstring_view;
std::basic_string_view< C, T > check1_t
std::string_view check2_t