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1411 :: [SOLVED] Macros for enums

• reactormonk (orginal) [2015-07-06T07:53:40+02:00] view original

  I currently have the code

  import macros
  
  dumpTree:
    type A = enum a, b
  
  macro test(): stmt =
    result = newStmtList(
      newNimNode(nnkTypeDef).add(
        ident("A"),
        newEmptyNode(),
        newNimNode(nnkEnumTy).add(
          newEmptyNode(),
          ident("a"),
          ident("b"))))
  
  test
  
  echo(a)
  echo(A.a)
  Run

  Which fails with

  Error: invalid expression: 'A = enum
  a, b'

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• mora (orginal) [2015-07-06T21:56:35+02:00] view original

  Hi,

  I extended your macro with echo treeRepr(result) to see what is missing. An extra newNimNode(nnkTypeSection).add( ... ) is needed.

  Peter

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