Re: How about a special null template parameter?

[Timon Gehr via Digitalmars-d]

On 19.08.2016 20:25, Engine Machine wrote:

So we can create types relationships easier:

class Type(T) : Type!null
{
   int x;
   static if (T is Dog)
       int y;

alias Seq(T...)=T;

template TypeParent(T...) if(T.length==1){
    static if(is(typeof(T[0])==typeof(null))) alias TypeParent = Seq!();
    else alias TypeParent = Seq!(Type!null);
}

class Type(T...): TypeParent!T if(T.length==1){
   int x;
   static if (T is Dog)
       int y;
}