Move to using xeus-cpp instead of xeus-cling

[vgvassilev]

Fixes #985.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.10%. Comparing base (e9c47b7) to head (541afba).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1017      +/-   ##
==========================================
+ Coverage   94.00%   94.10%   +0.09%     
==========================================
  Files          55       55              
  Lines        8139     8225      +86     
==========================================
+ Hits         7651     7740      +89     
+ Misses        488      485       -3     

see 4 files with indirect coverage changes

see 4 files with indirect coverage changes

[davidlange6]

fwiw, I tried this and see that it doesn't preserve current behavior of printing results - eg, the first intro notebook example results the image below. (also a compilation error means restarting the kernel - though I do not believe that to be a regression.

[vgvassilev]

Yes, if you replace it with printf it works but there are still a few issues. I've asked @tharun571 to take a look.

[anutosh491]

I was looking into some functionality for xeus-clad (maybe using xeus-cpp). Is this good to go ?

[tharun571]

I was looking into some functionality for xeus-clad (maybe using xeus-cpp). Is this good to go ?

I don't think so. There are some functional discrepancies present. Hessian and Jacobian functions do not work as intended with xeus-cpp.