prog.cpp: In function ‘int f()’:
prog.cpp:7:22: error: converting to execution character set: Invalid or incomplete multibyte or wide character
using b=decltype(U"\x8111"_s);
^
prog.cpp:8:22: error: converting to execution character set: Invalid or incomplete multibyte or wide character
using c=decltype(U" \x1181"_s);
^