我可以像使用C ++一个C＃函数内的参考？ [英] Can I use a reference inside a C# function like C++?

问题描述

在C ++中我可以这样做：

In C++ I can do this:

 int flag=0,int1=0,int2=1;
 int &iRef = (flag==0?int1:int2);
 iRef +=1;

与INT1被增加的效果。

with the effect that int1 gets incremented.

我要修改一些较老的C＃代码，这将是非常有益的，如果我可以做类似的事情，但我想......也许不是。 ？有人

I have to modify some older c# code and it would be really helpful if I could do something similar, but I'm thinking ... maybe not. Anybody?

推荐答案

您的 的可以做到这一点 - 或者至少是非常类似的东西你想要什么 - 但它可能是最好能找到另一种方法。例如，你可以用一个简单的引用类型里面整数

You can do it - or at least something very similar to what you want - but it's probably best to find another approach. For example, you can wrap the integers inside a simple reference type.

如果你仍然想这样做，请参阅参考< T> 类张贴埃里克利珀的这里：

If you still want to do it, see the Ref<T> class posted by Eric Lippert here:

sealed class Ref<T>
{
    private readonly Func<T> getter;
    private readonly Action<T> setter;
    public Ref(Func<T> getter, Action<T> setter)
    {
        this.getter = getter;
        this.setter = setter;
    }
    public T Value { get { return getter(); } set { setter(value); } }
}

public class Program
{
    public static void Main()
    {
         int flag=0,int1=0,int2=1;

         Ref<int> iRef = (flag == 0 ?
            new Ref<int>(() => int1, z => { int1 = z; }) :
            new Ref<int>(() => int2, z => { int2 = z; }));

         iRef.Value += 1;

        Console.WriteLine(int1);
    }
}

输出：

Output:

1

这篇关于我可以像使用C ++一个C＃函数内的参考？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！