Code Style

[sjanssen2]

We are linting the source code in src/ and rtlib/ via cpplint:

gapc/.github/workflows/c-cpp.yml

Line 141 in c2060a9

- run: cpplint --recursive --counting 'detailed' --filter="-runtime/references,-runtime/explicit,-build/include_order" --extensions=cc,hh src/ rtlib/

However, we currently exclude three types of code style violations to make the process pass without errors. We should spent some time, fixing these remaining issues to ultimately lift the three filter exclusions --filter="-runtime/references,-runtime/explicit" and have nice and readable C++ code!

[sjanssen2]

I think I could solve all "explicit" issues for src/*