How to get the "real" function name inside another function?

Question

Sometimes there is need to have some reflection for debugging. But the way like

System.Reflection.MethodBase.GetCurrentMethod().GetParameters().[0].Name

returns parameter name, not the actual function name. How to find out the 'real' name for the function in this case?

void OuterFunction(Func<string, int> f)
{
   int result = f("input");
   // how to get here function name 'g' instead of 'f'?
}

int g(string s)
{
    Console.WriteLine(s);
    return 0;
}

OuterFunction(g);

What would you like to get if you call `OuterFunction(x => 10)`? — MarcinJuraszek, Feb 04 '14 at 00:06
Probably something like this: http://stackoverflow.com/q/1495465 — Robert Harvey, Feb 04 '14 at 00:07

score 0 · Answer 1 · answered Feb 04 '14 at 00:19

0

Write:

f.Method.Name

And don't forget to correct g to return int for it to compile ;)

answered Feb 04 '14 at 00:19

JonPall

794
3
9

I just fixed the return type of `g` in the question. – Timothy Shields Feb 04 '14 at 00:22

score 0 · Accepted Answer · answered Feb 04 '14 at 00:20

Use the Method property of the delegate f.

void OuterFunction(Func<string, int> f)
{
    int result = f("input");
    string name = f.Method.Name;
    //name has the value "g" in your example
}

Note that if you pass in a lambda, you'll get a generated name for that lambda's body, like (Main)b__0.

How to get the "real" function name inside another function?

2 Answers2