Re: IF / ELSE / ENDIF macros for M4

Hello again,

what do you all think about including something like these with the 
other examples in the upcoming release?

Another person wanting this a while back:
https://stackoverflow.com/questions/19059432/triple-conditional-check-with-ifdef-in-m4

     Any thoughts? :-)
     Clif

On 4/7/21 9:58 AM, Mr. Clif wrote:
> Greetings,
>
> I heard a long time ago that CPP was derived from M4, and read that a 
> few folks including myself have looked for IF / ENDIF type macros to 
> use on other projects. CPP is not ideal in that it wants to take extra 
> steps like tokenizing the source.
>
> Here is a post from someone else looking:
>
> https://stackoverflow.com/questions/50549946/conditional-compilation-interpretation-using-m4/66978338#66978338
>
> So not finding anything like this, I wrote some that seem to work 
> pretty well. Here they are:
>
> http://www.eugeneweb.com/wiki/Sites/M4Macros
>
> I defined the names without the #'s eg. IF, ELSE, ENDIF, etc... Also 
> M4 requires parentheses to hold the arguments where CPP does not (at 
> least for most of these). I also added a selective invoke, to protect 
> macros with side effects from invocation in an unselected block.
>
> I was wondering if they pass muster, if the devs might consider 
> including them or something similar in M4's list of examples. 
> <https://stackoverflow.com/posts/66978338/timeline>
>
>     Best,
>     Clif