kalvdans
commented
4 months ago It's a common practise for foo.cc to include foo.hh as its first include. That way, the compilation will test that the header is self-containing. Would you accept a pull request that changes all source files to include "their" header file first?
In the current state of the implementation, headers are not self-contained. That is, when a header is included it may not include itself some other required headers, assuming the caller would have included it.
There shouldn't be any prior dependency on any other header, so they can be easily changed and moved around. This also helps identify dependencies among code.
This tool can help: https://include-what-you-use.org/