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8922 :: Changing enums in macros

• roma57 (orginal) [2022-02-15T21:49:45+01:00] view original

  I wonder if it's possible to create a macro which does something like that:

  object Tags = enum
  
  # here is the macro
  macro createTag(name: untyped): untyped = ...
  
  createTag(Tag1)
  createTag(Tag2)
  
  # === same as: ===
  object Tags = enum
      Tag1, Tag2
  Run

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• PMunch (orginal) [2022-02-15T22:45:33+01:00] view original

  I don't believe this would be possible. In general you can't modify things outside of your macro. You can create things which changes the program following the macro call, but things from before the macro call are generally out of bounds.

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