static Seq <Edit <EqA, A> > normalise1(Seq <Edit <EqA, A> .Insert> inserts, Seq <Edit <EqA, A> .Delete> deletes, Seq <Edit <EqA, A> .Replace> replaces)
{
if (!inserts.IsEmpty && !deletes.IsEmpty)
{
return(normalise1(inserts.Tail, deletes.Tail, Edit <EqA, A> .Replace.New(deletes.Head.Position, deletes.Head.Element, inserts.Head.Element).Cons(replaces)));
}
if (deletes.IsEmpty)
{
return(toSeq(inserts.Map(i => i as Edit <EqA, A>).ConcatFast(replaces.Take(1)).ToArray()));
}
if (inserts.IsEmpty)
{
return(Seq1(deletes.Head as Edit <EqA, A>));
}
throw new InvalidOperationException();
}
public ISeqInternal <A> Add(A value)
{
var last = ms.Last.Add(value);
return(new SeqConcat <A>(ms.Take(ms.Count - 1).Add(last)));
}
