internal static OrderByEnumerable <TItem, TKey, TEnumerable, TEnumerator, DefaultDescending <TItem, TKey> > OrderByDescendingImpl <TItem, TKey, TEnumerable, TEnumerator>(ref TEnumerable source, Func <TItem, TKey> keySelector)
where TEnumerable : struct, IStructEnumerable <TItem, TEnumerator>
where TEnumerator : struct, IStructEnumerator <TItem>
{
var bridge = new DefaultDescending <TItem, TKey>(keySelector);
return(new OrderByEnumerable <TItem, TKey, TEnumerable, TEnumerator, DefaultDescending <TItem, TKey> >(ref source, ref bridge));
}
> ThenByDescendingImpl <TItem, TFirstKey, TComparer, TOuterEnumerable, TOuterEnumerator, TInnerEnumerable, TInnerEnumerator, TSecondKey>(
ref TOuterEnumerable source,
Func <TItem, TSecondKey> keySelector
)
where TOuterEnumerable : struct, IStructEnumerable <TItem, TOuterEnumerator>, IHasComparer <TItem, TFirstKey, TComparer, TInnerEnumerable, TInnerEnumerator>
where TOuterEnumerator : struct, IStructEnumerator <TItem>
where TInnerEnumerable : struct, IStructEnumerable <TItem, TInnerEnumerator>
where TInnerEnumerator : struct, IStructEnumerator <TItem>
where TComparer : struct, IStructComparer <TItem, TFirstKey>
{
var leftComparer = source.GetComparer();
var rightComparer = new DefaultDescending <TItem, TSecondKey>(keySelector);
var newComparer = new CompoundComparer <TItem, TFirstKey, TComparer, TSecondKey, DefaultDescending <TItem, TSecondKey> >(ref leftComparer, ref rightComparer);
var inner = source.GetInnerEnumerable();
return(new OrderByEnumerable <TItem, CompoundKey <TFirstKey, TSecondKey>, TInnerEnumerable, TInnerEnumerator, CompoundComparer <TItem, TFirstKey, TComparer, TSecondKey, DefaultDescending <TItem, TSecondKey> > >(ref inner, ref newComparer));
}