def types(self, *args):
return '<STR_LIT:U+002CU+0020>'.join(['<STR_LIT>'.format(type(arg).__name__, arg) for arg in args])<EOL>
Used for debugging, returns type of each arg.
            TYPES,ARG_1,...,ARG_N

        %{TYPES:A,...,10} -> 'str(A) str(B) ... int(10)'