我可以将参数作为数组传递吗? [英] Can I pass params as an array?

问题描述

例如，代替

assert_eq!(add(2,3), 5);

有什么方法可以调用类似的东西

is there some way to call something like

let params: [u32; 2] = [2 ,3];
assert_eq!(call!(&add, params), 5);

我会发现此功能对于测试非常有用.例如，如果我想为需要大量参数的函数编写多个测试，则希望能够重用这样的虚拟参数对象:

I would find this functionality very useful for testing. E.g., if I want to write multiple tests for a function that takes a large number of params, I want to be able to reuse a dummy param object like this:

#[cfg(test)]
mod tests {
    const dummy: [u32; 5] = [0, 0, 0, 0, 0]; 

    #[test]
    fn test_first_param() {
        let mut params = dummy;
        params[0] = 1;
        assert_eq!(call!(&add, params)), 1);
    }

    #[test]
    fn test_second_param() {
        let mut params = dummy;
        params[1] = 1;
        assert_eq!(call!(&add, params)), 1);
    }
}

如果不存在此功能，那么有人会对我制作和发布宏感兴趣吗?

If this functionality does not exist, would anyone be interested in me making and publishing a macro?

推荐答案

该语言中没有任何功能可以枚举数组并将每个元素作为参数传递.您确实需要一个宏.

There's no feature in the language that enumerates over an array and passes each element as an argument. You're correct that you'd need a macro.

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