public async Task <bool> MoveNext(CancellationToken cancellationToken)
{
if (_sourceEnumerator == null)
{
_sourceEnumerator = _groupJoinAsyncEnumerable._source.GetEnumerator();
_hasRows = await _sourceEnumerator.MoveNext();
}
if (_hasRows)
{
var outerQueryResultScope = _sourceEnumerator.Current;
var innerQueryResultScopes = new List <QueryResultScope <TResult> >();
if (_sourceEnumerator.Current.UntypedResult == null)
{
_hasRows = await _sourceEnumerator.MoveNext();
}
else
{
var parentScope = _sourceEnumerator.Current.ParentScope;
while (_hasRows)
{
innerQueryResultScopes.Add((QueryResultScope <TResult>)_sourceEnumerator.Current);
_hasRows = await _sourceEnumerator.MoveNext();
if (_hasRows &&
!ReferenceEquals(
parentScope.UntypedResult,
_sourceEnumerator.Current.ParentScope.UntypedResult))
{
break;
}
}
}
Current
= _groupJoinAsyncEnumerable._resultSelector(
outerQueryResultScope, AsyncLinqOperatorProvider.ToAsyncEnumerable(innerQueryResultScopes));
return(true);
}
return(false);
}
public async Task <bool> MoveNext(CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
if (_sourceEnumerator == null)
{
_sourceEnumerator = _groupJoinAsyncEnumerable._source.GetEnumerator();
_hasNext = await _sourceEnumerator.MoveNext();
}
if (_hasNext)
{
var outer
= _groupJoinAsyncEnumerable._outerShaper
.Shape(_groupJoinAsyncEnumerable._queryContext, _sourceEnumerator.Current);
var inner
= _groupJoinAsyncEnumerable._innerShaper
.Shape(_groupJoinAsyncEnumerable._queryContext, _sourceEnumerator.Current);
var inners = new List <TInner>();
if (inner == null)
{
Current
= _groupJoinAsyncEnumerable._resultSelector(
outer, AsyncLinqOperatorProvider.ToAsyncEnumerable(inners));
_hasNext = await _sourceEnumerator.MoveNext();
return(true);
}
var currentGroupKey = _groupJoinAsyncEnumerable._innerKeySelector(inner);
inners.Add(inner);
while (true)
{
_hasNext = await _sourceEnumerator.MoveNext();
if (!_hasNext)
{
break;
}
inner
= _groupJoinAsyncEnumerable._innerShaper
.Shape(_groupJoinAsyncEnumerable._queryContext, _sourceEnumerator.Current);
if (inner == null)
{
break;
}
var innerKey = _groupJoinAsyncEnumerable._innerKeySelector(inner);
if (!_comparer.Equals(currentGroupKey, innerKey))
{
break;
}
inners.Add(inner);
}
Current
= _groupJoinAsyncEnumerable._resultSelector(
outer, AsyncLinqOperatorProvider.ToAsyncEnumerable(inners));
return(true);
}
return(false);
}
