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
