Consumes an integer number.

    Args:
      is_long: True if the value should be returned as a long integer.
    Returns:
      The integer parsed.

    Raises:
      ParseError: If an integer couldn't be consumed.

def ConsumeInteger(self, is_long=False):
    """Consumes an integer number.

    Args:
      is_long: True if the value should be returned as a long integer.
    Returns:
      The integer parsed.

    Raises:
      ParseError: If an integer couldn't be consumed.
    """
    try:
      result = _ParseAbstractInteger(self.token, is_long=is_long)
    except ValueError as e:
      raise self.ParseError(str(e))
    self.NextToken()
    return result