Create mixins from a list of strings

[Philippe Sigaud]

Maybe you could use just one name and put the dispatching code inside it?

T actor(T)(T t)
{
    switch (t.name)
    {
        case "Gramm.Expr":
            return foo(t);
        case "Gramm.FunctionCall":
            return foo(t);
        case "Gramm.Declaration":
            return foo(t);
        default:
            throw new Exception("...");
    }
}

or do it with a template, holding function names as aliases:

alias actor = dispatcher!(foo, bar, baz);