foreach over object that implements IEnumerable<T>

There seems to be a conversion issue when you try to iterate over a container 
implementing IEnumerable

        [JsType(JsMode.Clr, Filename = "res/Default.js")]
        public class IntContainer : IEnumerable<int>
        {
            public IEnumerator<int> GetEnumerator()
            {
                yield return 1;
                yield return 7;
                yield return 8;
            }

            IEnumerator IEnumerable.GetEnumerator()
            {
                return GetEnumerator();
            }

            public IEnumerable<int> GetVals()
            {
                yield return 9;
                yield return 4;
                yield return 5;
            }
        }

Then in usage

            var container = new IntContainer();

            foreach (var val in container.GetVals())
            {
                new jQuery("body").append(val + "<br/>");
            }

            foreach (var val in container)
            {
                new jQuery("body").append(val + "<br/>");
            }

The first iteration works correctly but the second fails

    var $it1 = container.GetVals().GetEnumerator();
    while ($it1.MoveNext())
    {
        var val = $it1.get_Current();
        $("body").append(val + "<br/>");
    }
    var $it2 = container.GetEnumerator();
    while ($it2.MoveNext())
    {
        var val = $it2.get_Current();
        $("body").append(val + "<br/>");
    }

which result in an error:

Unhandled exception at line 27, column 12 in 
http://localhost:18072/res/Default.js
0x800a01b6 - JavaScript runtime error: Object doesn't support property or 
method 'MoveNext'

If I manually hack the JavaScript to put in the extra GetEnumerator() then it 
works e.g.

    var $it1 = container.GetVals().GetEnumerator();
    while ($it1.MoveNext())
    {
        var val = $it1.get_Current();
        $("body").append(val + "<br/>");
    }
    var $it2 = container.GetEnumerator().GetEnumerator();
    while ($it2.MoveNext())
    {
        var val = $it2.get_Current();
        $("body").append(val + "<br/>");
    }

/*Generated by SharpKit 5 v5.01.0000*/
Original issue reported on code.google.com by co...@gravill.com on 3 May 2013 at 1:58
kjm00king / sharpkit

foreach over object that implements IEnumerable<T> #292
