如何声明与函数签名不同的新委托？

Question

delegate void EmptyBody(ref int first );
delegate void AnotherEmptyBody(int first );
delegate void AnotherEmptyBody1(int first, int second);

public void aaa(params object[] pars)
{
    DoSpecifiedProcessing();

    pars[0] = 11;
}

public bool OnInIt()
{
    int b = 0;

    b = 44;
    var n = new EmptyBody(aaa);
    n(ref b);
    //b variable must be 11


    b = 44;
    var x = new AnotherEmptyBody(aaa);
    x(b);
    //b shoudn't be changed in this call, so it should be 44
}

I'm trying to have a generic function like aaa which is defined in code.
The first call should change b because it's passed as by-ref but the second call shouldn't change b because it's passed as by-val.

Answer 1

You can't do it with delegates because the parameters of the delegates and aaa don't match.
You can do something like this instead (create method adapters aaaRefInt and aaaInt ):

public void aaaRefInt(ref int first)
{
    object[] Args = new object[]{first};        
    aaa(Args);
    first = (int)Args[0];
}

public void aaaInt(int first)
{
    aaa(new object[]{first});
}

var n = new EmptyBody(aaaRefInt);
n(ref b);

var x = new AnotherEmptyBody(aaaInt);
x(b);