有可能得到一个函数的返回类型不传递参数吗？

Is it possible to get the return type of a function without passing arguments to it?

youdao

D {format}：括弧里的字符串被传递给strftime(3)函数，返回值填充到提示符中。如果不传参数，会按照系统默认的当地时间格式来显示。

D {format} : the format is passed to strftime (3) and the result is inserted into the prompt string; an empty format results in a locale-specific time representation.

youdao

当调用 sign 方法时，如果不传递任何参数的话，生成的就是封外签名。

The enveloping signature is created when the sign method is called without any arguments.

youdao