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8412 :: Call parent `$` from overwritten converter?

• konradmb (orginal) [2021-09-10T19:01:11+02:00] view original

  I have this code:

  type Answer* {.pure.} = enum
      A, B, C, T, N
  
  converter `$`*(a: Answer): string =
    case a:
    of Answer.T:
      "Tak"
    of Answer.N:
      "Nie"
    else:
      $a #How to call parent?
  
  echo (A, B, T, N)
  Run

  https://play.nim-lang.org/#ix=3ytJ

  I want to get this output: (A, B, Tak, Nie).

  Right now it's looping forever, because it's calling itself.
  I know that I could assign string to enum, but in the future I wanted them to be translated.
  

  I think that the proc to call is this one: https://nim-lang.org/docs/dollars.html#%24%2CEnum but how can I explicitly call it, as to break the loop?

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• Knaque (orginal) [2021-09-10T19:24:00+02:00] view original

  system.`$`(a)

  Run

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• konradmb (orginal) [2021-09-10T19:31:01+02:00] view original

  Thanks! It's that simple ;)

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• Yardanico (orginal) [2021-09-10T21:24:30+02:00] view original

  By the way, you don't need it as a converter unless you really want it to convert to string automatically. Echo calls $ by itself so you can just make it a proc instead of a converter and your example will work the same.

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