F# special quotes? (##)

Question

I just ran across http://frankniemeyer.blogspot.com/2010/04/minimalistic-native-64-bit-array.html Which contains the line

(# \"sizeof !0\" type(\'T) : native         


        

Answer 1

Fascinating. But I think F# already gives us the conversion operations (for this particular operation!) you need without resorting to IL.

[]
let inline ArrayOffset (itemSize:int64) (length:int64) (start:int64) (idx:int64) = 
    if idx < 0L || idx >= length then raise(IndexOutOfRangeException())
    NativePtr.ofNativeInt(nativeint(start + (idx * itemSize)))