Re: master 87e7390: * lisp/progmodes/hideif.el: update for new C++ standards and extensions

[Luke Lee]

>Does this need a define-obsolete-variable-alias for backward
>compatibility?

You're right, I will add that in my next patch.

>> +(defcustom hide-ifdef-evalulate-leave-hook nil
>> +  "Hook function to be called when leaving `hif-evaluate-macro'."
>> +  :type 'hook
>> +  :version "27.2")
> 
>Should these :versions be "28.1"?

I originally planned to add it into emacs-27 branch but later found
in the contibution guide that 27.2 indicates a feature freeze branch.
Is there any way (or is it okay) to add it to emacs-27, if there is
an up-coming 27.3?  Or should I just leave it here in 28.1? Thanks.

Best regards,
Luke Lee