private static async Task _enumerate(AsyncEnumerator <TResult> .Yield yield, SelectWithIndexContext <TSource, TResult> context)
{
using (var enumerator = await context.Source.GetAsyncEnumeratorAsync(yield.CancellationToken).ConfigureAwait(false))
{
long index = 0;
while (await enumerator.MoveNextAsync(yield.CancellationToken).ConfigureAwait(false))
{
await yield.ReturnAsync(context.Selector(enumerator.Current, index)).ConfigureAwait(false);
index++;
}
}
}
private static async Task _enumerate(AsyncEnumerator <TResult> .Yield yield, SelectWithIndexContext <TSource, TResult> context)
{
try
{
long index = 0;
while (await context.Source.MoveNextAsync(yield.CancellationToken).ConfigureAwait(false))
{
await yield.ReturnAsync(context.Selector(context.Source.Current, index)).ConfigureAwait(false);
index++;
}
}
finally
{
if (context.DisposeSource)
{
context.Source.Dispose();
}
}
}