static public LazyCons <T> FromEnumerable(IEnumerator <T> e)
{
if (!e.MoveNext())
{
return(null);
}
return(new LazyCons <T>(e.Current, () => LazyCons <T> .FromEnumerable(e)));
}
static void Main(string[] args)
{
var xs = Cons <int> .FromEnumerable(new int[] { 1, 2, 3 });
foreach (var x in xs)
{
Console.WriteLine(x);
}
var ys = xs.tail;
xs.tail.head *= -1;
foreach (var y in ys)
{
Console.WriteLine(y);
}
var zs = LazyCons <int> .FromEnumerable(xs);
foreach (var z in zs)
{
Console.WriteLine(z);
}
foreach (var z in zs)
{
Console.WriteLine(z);
}
Func <int, Cons <int>, Cons <int> > cons = (q, qs) => new Cons <int>(q, qs);
var ws = Cons <int> .FoldR(cons, xs);
foreach (var w in ws)
{
Console.WriteLine(w);
}
var vs = Cons <int> .FoldL(Funky.Flip(cons), xs);
foreach (var v in vs)
{
Console.WriteLine(v);
}
var ss = new Stack <int>();
ss.push(1);
ss.push(2);
Console.WriteLine(ss.pop());
Console.WriteLine(ss.pop());
Console.WriteLine(ss.pop(0));
try
{
Console.WriteLine(ss.pop());
}
catch (Exception e)
{
Console.WriteLine(e);
}
var ms = new MStack <int>();
ms.push(1);
ms.push(2);
Console.WriteLine(ms.pop());
Console.WriteLine(ms.pop());
Console.WriteLine(ms.pop(0));
try
{
Console.WriteLine(ms.pop());
}
catch (Exception e)
{
Console.WriteLine(e);
}
}