GitLab

#1611 Fix a misconstruct in Yaml files that prevented proper build of the Doxygen documentation through Doxygen. Also remove the limitation that Gitla pages is invoked only for the main project and not for the forks.

#1602 IWYU: fix some warnings from the CI VM (convention for type_traits seems not to be the same as for my personal computer).

#1610 CI: for IWYU job, specify in macOS runner the path to the Anaconda Python, which knows the new string syntax (>= Python 3.6).

#1610 Refine IWYU job with artifacts and fix a mistake in the path of the Python script. Also introduceback an intentional warning in the code so that I can check it behaves as expected.

#1610 Introduce IWYU in CI: it should be run in a Docker container and an ad hoc script should interpret the output and ensure all files are cleared properly by the tool.

#1601 - #1602 Replace the C includes by their C++ counterpart (cmath instead of math.h - the latter was issued by IWYU and I didn't think at the time at using the stl.imp file to fix that).

#1601 Few clang-format modifications due to run from Fedora. It has been decided Fedora should be the reference (as it is the one that is run in CI process) - the differences are anyway very limited. Currently clang-format v11.0.0 is used.

#1602 Apply clang-format... which invalidated the space I put back in templates. THere isn't an option to impose this space, other than specifying the standard as C++ 03 which would be a bit extreme. clang-format off would majke the code less readable, so I will just ignore those in SonarQube for the time being and hope the plugin will provide support for the >> syntax soon enough.

#1602 Add spaces in '>>' templates: this perfectly valid new C++11 syntax is now handled well by SonarQube.

#1593 Add a README explaining how to use sslr-cxx-toolkit tool to figure out the files that can't be parsed.

#1606 Improve Changelog format (as it was used to run a script to populate semi-automatically old issues in Gitlab).

#1602 Modify header_guards.py script so that it adds a IWYU directive in hxx file mentioning the hpp should also be suggested as include.

#1602 IWYU: update the README now that I figured out how to invoke properly the command through the build system.

#1601 - #1604 Improve clang format script so that the modified files are listed at the end (this will be of use when putting clang-format in CI)