public CompositeSet(Set a, Set b, Func<Set, Set, object, bool> compositor)
{
A = a;
B = b;
if (compositor == null) throw new ArgumentNullException("compositor");
this.compositor = compositor;
}
public static Set Subtraction(Set a, Set b)
{
return new CompositeSet(a, b, (s1, s2, item) => s1.Contains(item) && !s2.Contains(item));
}
public static Set Union(Set a, Set b)
{
return new CompositeSet(a, b, (s1, s2, item) => s1.Contains(item) || s2.Contains(item));
}
public static Set Intersection(Set a, Set b)
{
return new CompositeSet(a, b, (s1, s2, item) => s1.Contains(item) && s2.Contains(item));
}
