bash-2.03$ c0 -a test3.c0
--(end of buffer or a NUL)
--accepting rule at line 63 ("int")
   3.000   263  TOK_KW_INT      (int)     
--accepting rule at line 37 (" ")
--accepting rule at line 63 ("x")
   3.000   259  TOK_IDENT       (x)       
--accepting rule at line 50 (";")
   3.000   278  NEG             (;)       
test3.c0: test3.c0: 1: syntax error, unexpected NEG, expecting $end
test3.c0: parse failed (1)