int main() { typedef std::experimental::string_view string_view; typedef std::experimental::u16string_view u16string_view; typedef std::experimental::u32string_view u32string_view; typedef std::experimental::wstring_view wstring_view; test(string_view ()); test(u16string_view()); test(u32string_view()); test(wstring_view ()); test(string_view ( "123")); test(wstring_view (L"123")); #if __cplusplus >= 201103L test(u16string_view{u"123"}); test(u32string_view{U"123"}); #endif #if _LIBCPP_STD_VER > 11 { constexpr string_view sv { "123", 3 }; constexpr u16string_view u16sv {u"123", 3 }; constexpr u32string_view u32sv {U"123", 3 }; constexpr wstring_view wsv {L"123", 3 }; static_assert ( *sv.begin() == sv[0], "" ); static_assert ( *u16sv.begin() == u16sv[0], "" ); static_assert ( *u32sv.begin() == u32sv[0], "" ); static_assert ( *wsv.begin() == wsv[0], "" ); static_assert ( *sv.cbegin() == sv[0], "" ); static_assert ( *u16sv.cbegin() == u16sv[0], "" ); static_assert ( *u32sv.cbegin() == u32sv[0], "" ); static_assert ( *wsv.cbegin() == wsv[0], "" ); } #endif }