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6528 :: Better way to convert untyped into NimNode?

• shirleyquirk (orginal) [2020-07-09T20:47:23+02:00] view original

  I'm trying to write a helper macro that takes in an untyped argument and converts it directly into the appropriate NimNode. what I've ended up doing is

  var nimNodes{.compiletime.} = seq[NimNode]
  var nimNodeIndex{.compiletime.} = 0
  macro toNimNode(x: untyped):int =
    nimNodes.add(x)
    result = newLit(nimNodeIndex)
    inc nimNodeIndex
  Run

  and then using the returned index as a fake pointer. This is the kludgiest of kludges; is there a cleaner way that I'm not seeing?

  Motivating example: building a compiletime Table[string,NimNode] or Table[NimTypeKind,NimNode] for another macro to use.

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• mratsim (orginal) [2020-07-09T23:42:53+02:00] view original

  untyped are automatically converted to NimNode.

  For your final use-case, look into the code of Synthesis:

  https://github.com/mratsim/Synthesis/blob/09bef6df/synthesis/factory.nim#L79-L111

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• shirleyquirk (orginal) [2020-07-10T00:38:14+02:00] view original

  Perfect! thank you! Synthesis was on my radar, but I hadn't delved yet. will certainly do so now.

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