New Post: V8 Iterators

engine.Script.host = new HostFunctions();
engine.AddHostType(typeof(IEnumerable));
engine.Execute(@"
    host.constructor.prototype[Symbol.iterator] = function () {
        var enumerable = host.asType(IEnumerable, this);
        if (host.isNull(enumerable))
            throw new TypeError('the host object is not enumerable');
        var enumerator = enumerable.GetEnumerator();
        return {
            next: function () {
                if (enumerator.MoveNext())
                    return { done: false, value: enumerator.Current };
                return { done: true };
            }
        };
    }
");