def led(self, left, context):
raise InvalidTokenError(<EOL>"<STR_LIT>" % (<EOL>self, context.current_pos))<EOL>
Left denotation.

        Describe what happens to this token when appearing inside a construct
        (at the left of the rest of the construct).

        Args:
            context (Parser): the parser from which 'next' data can be
                retrieved
            left (object): the representation of the construct on the
                left of this token

        Returns:
            object built from this token, what is on its right, and
                what was on its left.