[PATCH] conform: Add initial tests for C23.

[Collin Funk]

Hi Joesph,

Joseph Myers <josmyers@redhat.com> writes:

> The conform/ data should correspond to the standard, whether implemented 
> or not (and then potentially have XFAILs for things that are not 
> implemented) - not to a particular subset that's currently implemented.

Ok, sure. That makes sense.

> Also, for reviewability, I think a new standard should be added to 
> conform/ in two stages.  The first stage should be one (just in the *-data 
> files) that makes ISO23 into a clone of ISO11 - hopefully automatically 
> generated, and automatically verified that the results of preprocessing 
> the *-data files for existing standards are unchanged, and the results for 
> ISO11 and ISO23 are identical after that patch.  Only after that should 
> actual changes to the expectations relating to changes in C23 be done.

I see. For the first patch the following should work to automatically
update all the files:

    $ find conform -name '*.h-data' | xargs sed -i -e 's| !defined ISO11| !defined ISO11 \&\& !defined ISO23|g'
    $ find conform -name '*.h-data' | xargs sed -i -e 's| defined ISO11| defined ISO11 \|\| defined ISO23|g'
    $ find conform -name '*.h-data' | xargs sed -i -e 's|ifdef ISO11|if defined ISO11 \|\| defined ISO23|g'

And then don't change the Makefile or anything so the tests aren't run
by the bot?  Since we would get namespace violations for functions and
such added after C11.

Collin