[erlang-questions] Specs for optional callbacks (try 2)

Loïc Hoguin essen@REDACTED
Wed Sep 24 18:52:27 CEST 2014


I didn't get any reply on my previous question almost 2 years ago here: 

So let me ask again, is there any plans for adding something like 
-optional_callback that would do the same as -callback except it would 
not require the callback to be defined? Basically Dialyzer would use it, 
and the compiler wouldn't fail if the callback is missing.

As it stands now I am about to remove most -behavior in Cowboy because 
they're starting to make little sense because most callbacks become 
optional. The simplest handler type will have 3 possible callbacks, 2 
being optional. The most complex handler type already has 20+ callbacks 
with only 1 required.

Thanks for any reply.

Loïc Hoguin

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