public TResult this[int index]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
if (index < 0 || index >= source.Count)
{
Throw.IndexOutOfRangeException();
}
return(selector.Invoke(source.Array ![index + source.Offset]));
public readonly TSource this[int index]
{
get
{
if (index != 0)
{
Throw.IndexOutOfRangeException();
}
return(value);
}
}
public readonly int this[int index]
{
get
{
if (index < 0 || index >= Count)
{
Throw.IndexOutOfRangeException();
}
return(index + start);
}
}
public TResult this[int index]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
if (index < 0 || index >= source.Length)
{
Throw.IndexOutOfRangeException();
}
return(selector.Invoke(source.Span[index]));
}
}
public TResult this[int index]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
if (index < 0 || index >= count)
{
Throw.IndexOutOfRangeException();
}
return(selector.Invoke(start + index));
}
}
public readonly TSource this[int index]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
if (index != 0)
{
Throw.IndexOutOfRangeException();
}
return(value);
}
}
public TSource this[int index] => Throw.IndexOutOfRangeException <TSource>();