parser.py 文件源码

def command(arguments: List[ParserElement]):
    """
    command is a decorator which examines the function name and its arguments
    and registers `<function_name> arguments...` as part of the grammar.
    """

    def decorator(fn):
        fn_args = inspect.getfullargspec(fn).args
        _name = '.' + fn.__name__
        _arguments = Literal(_name)
        for i, arg in enumerate(arguments):
            _arguments += arg.setResultsName(fn_args[i])

        global grammar
        grammar |= _arguments

        def wrapper(parsed: Dict, event, event_user, event_channel, slack_client):
            return fn(**parsed, event=event, event_user=event_user, event_channel=event_channel, slack_client=slack_client)

        mapping[_name] = wrapper
        return wrapper

    return decorator