Any way to get the name of a function?

[Kai Meyer]

On 07/06/2011 08:47 PM, Andrej Mitrovic wrote:
> void foo(){};
> void bar(){};
>
> void main()
> {
>      auto funcs = [&foo,&bar];
> }
>
> I'm using this in a foreach loop and invoking each function with some
> predefined arguments. But I'd also like to extract the name of each
> function because each function does some image processing and then I
> save that image to disk.
>
> Basically I want to do:
>
>      foreach (func; funcs)
>      {
>          func(arguments..);
>          writeToFile(func.stringof);
>      }
>
> Obviously I can't use arrays since they don't hold any name
> information, they just store the pointers.
>
> Can I use tuples somehow? The functions are predefined, I just need to
> iterate through all of them and call them and extract their name.

I assume the function signatures are all the same? Then you can do an 
associative array:

import std.stdio;
int func1(int a) {return a + 1;}
int func2(int a) {return a + 2;}
int func3(int a) {return a + 3;}
void main()
{
     int function (int)[string] funcs = ["func1":&func1, \
			"func2":&func2, "func3":&func3];
     foreach(name, func; funcs)
         writef("%s %d\n", name, func(1));
}


Perhaps a mixin would be helpful to limit cut-and-paste issues. If they 
are methods that are part of a class, you would need to declare them as 
"int delegate (int)[string] funcs".