Fix #14336: Raise minimum c++ version to c++17

[autoantwort]

No description provided.

[firewave]

This is not something we desire. Also if we do this we need to announce it in advance and deprecate older standards first.

We are currently not even building with C++17 - see #7962.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

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[autoantwort]

This is not something we desire.

Can you elaborate why? (What target system is not able to compile c++17?)

[firewave]

Can you elaborate why? (What target system is not able to compile c++17?)

I already did in the ticket (this is gonna be a fragmented/disjoint discussion again). We have known users of niche and older platform which might not have (proper) C++17 support available in their compilers. I also do not see much to gain code wise from having C++17 available. It seems more to modernize it because for the sake of modernization. IMO it would actually mainly complicate things if we would move to C++17 features - we ourselves do not properly support it in the analysis so if we introduce issues we might not be able to detect them.

Also we should move to C++14 instead of leap-frogging it.