extendEnum.nim

import macros

macro enumExt(e: typed, nums: varargs[untyped]): untyped =
  # get type to access nodes of given enum
  let t = e.getType
  # seq to store syms to add to new enum
  var toAdd = newSeq[NimNode]()
  for x in t[1]:
    case x.kind
    of nnkSym:
      # add symbol to enum part
      toAdd.add x
    else:
      discard
  # add additional fields 
  for x in nums:
    toAdd.add x
      
  echo "New enum fields ", toAdd
  # create new enum
  result = nnkEnumTy.newTree(
    newEmptyNode()
  )
  # add old enum's fields + new ones
  for x in toAdd:
    result.add x
    
type
  miranNum = enum
    miOne, miTwo, miThree
  miranNumExt = enumExt(
    miranNum,
    miFour,
    miFive
  )

let a = miranNumExt.miFour
let b = miranNumExt.miOne

echo a
echo b

static: echo miranNumExt.getType.treeRepr