protected abstract bool FilterInternal(T item, Filterer <T> f1, Filterer <T> f2);
public Filterer_BinaryOperation(Filterer <T> f1, Filterer <T> f2)
{
filterer_left = f1;
filterer_right = f2;
}
public Filterer_BinaryOperation_Or(Filterer <T> f1, Filterer <T> f2) : base(f1, f2)
{
}
protected override bool FilterInternal(T item, Filterer <T> f1, Filterer <T> f2)
{
return(f1.Filter(item) || f2.Filter(item));
}
public Filterer_UnaryOperation(Filterer <T> f)
{
filterer = f;
}
public Filterer_UnaryOperation_Not(Filterer <T> f) : base(f)
{
}
protected override bool FilterInternal(T item, Filterer <T> f)
{
return(f.Filter(item) == false);
}