Optional parameters?

[Dukc]

On Sunday, 1 April 2018 at 15:54:16 UTC, Steven Schveighoffer 
wrote:
> But I'd rather avoid such things if possible. Is there a way 
> around this? Seems rather limiting that I can do:

Is this what you're looking for?

void foo(Nullable!int x = Nullable!int.init)
{   if (!x.isNull) x.get.writeln;
     else writeln;
}

void foo(int x)
{   return Nullable!int(x).foo;
}


void main()
{
    foo(1); // 1
    int x;
    foo(x++); // 0
    foo; // empty line
    foo(x); // 1
    readln();
}