Address of overloaded functions

[John Colvin]

Is there any way to take the address of any of an overloaded set 
of functions?

import std.stdio;
void foo(int a){ writeln("overload int"); }
void foo(long b){ writeln("overload long"); }

void main()
{
    auto b = &foo; //ambiguous => error
    b(2); //valid for either overload
}