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

Alex S. <>
Mon Jan 30 16:31:24 CET 2017


> 30 янв. 2017 г., в 18:24, <> <> написал(а):
> 
> Here’s a behaviour that’s had me tearing my hair today. Consider this module:
>  
> -module('Aaargh!!').
> -define(PLEASE_DONT).
> -ifndef(PLEASE_DONT).
> -compile({parse_transform,undefined_parse_transform}).
> -endif.
>  
> It fails to compile, with one simple error message:
>  
> 20> c('Aaargh!!').
> Aaargh!!.erl: undefined parse transform 'undefined_parse_transform'
> error
>  
> 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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