How do you use templates in D?

[Andrej Mitrovic]

You could pass arbitrary functions like so:

auto genArray(T...)(T dgs)
    if (allSatisfy!(isSomeFunction, T))
{
}

and call it:

genArray({ return cast(char) uniform(0, 128); },
              { return cast(int) uniform(0, 128); });

I'm not sure what you would want to do with lambdas with arbitrary
return types though. I'll leave someone else to answer Lispy things.