/in/foo.c:1:2: error: invalid preprocessing directive #iostlu
 #iostlu<iocuse>
  ^~~~~~
/in/foo.c:2:1: error: unknown type name 'using'
 using   nian<pds.sunt>
 ^~~~~
/in/foo.c:2:13: error: expected '=', ',', ';', 'asm' or '__attribute__' before '<' token
 using   nian<pds.sunt>
             ^