Discussion thread for (RFC FS-1053](https://github.com/fsharp/fslang-design/blob/master/FSharp-4.5/FS-1053-span.md) covering all of * voidptr * IsReadOnly * ByRefLike * "return byrefs" * "byref this extension members" * Span * Memory
Discussion thread for (RFC FS-1053](https://github.com/fsharp/fslang-design/blob/master/FSharp-4.5/FS-1053-span.md) covering all of