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3242 :: Error: expression has no address with openArray

• sflennik (orginal) [2017-10-13T06:13:56+02:00] view original

  How do I swap the first two bytes of the openArray in the following code?

  t.nim(5, 35) Error: expression has no address

  import strutils
  import endians
  
  proc num(buffer: openArray[uint8]): uint16 =
    swapEndian16(addr(result), addr(buffer))
  
  var buffer = [0x01'u8, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]
  var num16 = num(buffer)
  echo toHex(num16)
  Run

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• jlp765 (orginal) [2017-10-13T06:52:00+02:00] view original

  Two ways (at least):

  • make it a var openArray[]
  • use unsafeAddr

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