[erlang-questions] For your amusement--why doesn't this compile?

john.hughes@REDACTED john.hughes@REDACTED
Mon Jan 30 16:38:57 CET 2017

So why isn’t that reported as an error?


From: Alex S. 
Sent: Monday, January 30, 2017 4:31 PM
To: john.hughes@REDACTED 
Cc: erlang-questions@REDACTED 
Subject: Re: [erlang-questions] For your amusement--why doesn't this compile?

  30 янв. 2017 г., в 18:24, <john.hughes@REDACTED> <john.hughes@REDACTED> написал(а):

  Here’s a behaviour that’s had me tearing my hair today. Consider this module:


  It fails to compile, with one simple error message:

  20> c('Aaargh!!').
  Aaargh!!.erl: undefined parse transform 'undefined_parse_transform'

  If you can see why, you’re more an Erlang wizard than I am!

Easy enough, there’s no one-argument define().

Define it to true if you don’t care about the value.
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