How can I store delegates in array?

[Chopin]

I tried the following:

import std.stdio;
import std.regex;

bool lol(string name, string val)
{
     if (name == "lal")
         if (val[0..3] == "2124")
             return true;
     return false;
}

bool lal(string name, string val) { return false; }
alias bool delegate(string, string) DgType;
void main()
{
     struct Filter
     {

         private DgType[] delFuncs; // array with functions :D


         public void add(DgType filter_func) {
             delFuncs ~= filter_func;
         }
     }

     auto x = Filter();
     x.add(&lol);
     x.add(&lal);

     writeln(x);
}

Didn't work... just a bunch of errors...

t.d(28): Error: function t.main.Filter.add (bool delegate(string, 
string) filter_func) is not callable using argument types (bool 
function(string name, string v
al))
t.d(28): Error: cannot implicitly convert expression (& lol) of 
type bool function(string name, string val) to bool 
delegate(string, string)
t.d(29): Error: function t.main.Filter.add (bool delegate(string, 
string) filter_func) is not callable using argument types (bool 
function(string name, string v
al))
t.d(29): Error: cannot implicitly convert expression (& lal) of 
type bool function(string name, string val) to bool 
delegate(string, string)

Thanks for help!