功能参数数量未知 [英] Func<> with unknown number of parameters

问题描述

考虑以下伪代码:

TResult Foo<TResult>(Func<T1, T2,...,Tn, TResult> f, params object[] args)
{
    TResult result = f(args);
    return result;
}

该函数接受具有未知数量的通用参数和相应参数列表的 Func<>.可以用C#写吗?如何定义和调用Foo?如何将 args 传递给 f?

The function accepts Func<> with unknown number of generic parameters and a list of the corresponding arguments. Is it possible to write it in C#? How to define and call Foo? How do I pass args to f?

推荐答案

那是不可能的.充其量，您可以拥有一个也接受可变数量参数的委托，然后让委托解析参数

That's not possible. At best, you could have a delegate that also takes a variable number of arguments, and then have the delegate parse the arguments

TResult Foo<TResult>(Func<object[], TResult> f, params object[] args)
{
    TResult result = f(args);
    return result;
}

Foo<int>(args =>
{
    var name = args[0] as string;
    var age = (int) args[1];

    //...

    return age;
}, arg1, arg2, arg3);

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