reading in a struct (with only static sized types) in Nim

binary2struct.nim

type
  SomeStruct = object
    longPtr: uint64
    length: uint32

var x: ptr SomeStruct
var dat: array[12, char]

for ch in mitems(dat):
  ch = high(char)

x = cast[ptr SomeStruct](addr(dat))

echo $x.length
echo $high(uint32) # confirm correctness

x.length = 0
echo $dat # check if it works the other way