有没有标准的“永不退货"?C# 函数的属性? [英] Is there a standard "never returns" attribute for C# functions?

问题描述

我有一种方法如下所示:

I have one method that looks like this:

void throwException(string msg)
{
    throw new MyException(msg);
}

现在如果我写

int foo(int x, y)
{
    if (y == 0)
        throwException("Doh!");
    else
        return x/y;
}

编译器会抱怨 foo 并非所有路径都返回值".

the compiler will complain about foo that "not all paths return a value".

有没有我可以添加到 throwException 的属性来避免这种情况?比如:

Is there an attribute I can add to throwException to avoid that ? Something like:

[NeverReturns]
void throwException(string msg)
{
    throw new MyException(msg);
}

恐怕自定义属性不行，因为我需要编译器的配合.

I'm afraid custom attributes won't do, because for my purpose I'd need the cooperation of the compiler.

推荐答案

没有.我建议您更改第一个函数的签名以返回异常而不是抛出异常，并将 throw 语句保留在第二个函数中.这会让编译器满意，而且气味也不会那么难闻.

No. I suggest you change the signature of your first function to return the exception rather than throw it, and leave the throw statement in your second function. That'll keep the compiler happy, and smells less bad as well.

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