have the C++ compiler generate the tables.

[lemire]

Instead of having hard-coded tables, we can ask the C++ to generate them.

There is no obvious performance degradation (benchdata, LLVM 14).

cc @ShogunPanda

[ShogunPanda]

To be honest, since I also believe it won't affect performance, I would merge this.

Even if you did it for fun I actually think it improves readability of the code: rather than manually review the code it is easier to spot which elements are set to true and why.

WDYT?

[lemire]

I don’t disagree but we need to investigate the CI issues. At least one is unrelated to this PR, and I will examine it soon.

The performance should be identical, but we should check that it is before merging, as an abundance of caution.

[lemire]

@anonrig This could be merged.

Note that if you have an old compiler with partial support for C++17, this code might break it. We require genuine C++17 support.

[lemire]

@anonrig I don't know how to fix the linter errors. I ran clang-format on the code.

[lemire]

@anonrig I think I fixed the linter issue by reverting clang-format to version 14. Indeed, clang-format is version specific.

[lemire]

@anonrig All reasonable comments.

[lemire]

@anonrig Code updated.

[lemire]

@anonrig Might be good now.