private IEnumerator <object> Accumulator(CodeContext /*!*/ context, IEnumerator iterable, object function)
{
if (!MoveNextHelper(iterable))
{
yield break;
}
object total = iterable.Current;
yield return(total);
if (function == null)
{
PythonContext pc = context.LanguageContext;
while (MoveNextHelper(iterable))
{
total = pc.Add(total, iterable.Current);
yield return(total);
}
}
else
{
while (MoveNextHelper(iterable))
{
total = PythonCalls.Call(function, total, iterable.Current);
yield return(total);
}
}
}