Any plan to support C++20 ?

[chavid]

There was some hope that after the recent cling 1.0 release, we may get C++20 in xeus-cling. Optimistic ?

[girdevstack]

I see that cling had a PR to add c++20 and 23 support back in April but the merge wasn't completed. I pinged the folks on that to see if they can finish getting it merged. I suspect that is a blocker for this project to add it. Sure would like to see some newer feature sets added to this project.

[thisryan]

Any news on this? As far as i can see the c++20 kernel not yet there?

[ben0i0d]

cling has merged .
root-project/cling@628a18e

[girdevstack]

I bumped one of the issue/questions in the cling repo to see if they can help get a release cut. Then we can start shaking some trees over here. Maybe we can help get a c++20 kernel out before 2025 🤞

[ferdymercury]

cling 1.2 was just released with c++20 kernel support

[martinRenou]

Any contribution for this would be really welcome! I can help with review of a PR updating cling.

[girdevstack]

@martinRenou - I've been nudging things along over on an issue that was opened in the cling repo root-project/cling#524. One of the folks on that project was able to get a new release cut that contains the upstream changes needed for c++20, but there is more. I looked through the build pipeline for xeus-cling and it looks like they use built binaries from conda forge, those are 3 releases behind where cling currently is. So until that is done I'm not sure that much can be done over here without manually building cling and then using that to build this for the sake of testing or whatever.

Once cling 1.2 has an artifact in conda forge I think that all that is needed over here is to update the version of cling in environment-host.yml and test to see if anything breaks and then push the new release. I don't have annnny idea who to ping over on this side though to get the PR merged once cling is ready in conda-forge.

[martinRenou]

Sounds good!

The Cling conda-forge recipe lives here https://github.com/conda-forge/cling-feedstock/pulls, it seems the latest attempts to update the recipe faild

[girdevstack]

Ah brilliant at least we know where to look to see what is going on with that build. Thank you!