Unions: delving into unsafe Rust

I came across union while looking through the code of the client's library for the new trading platform WATS by the Warsaw Stock Exchange (GPW), which currently is (still) under development. When I skimmed through the code, I noticed a lot of unsafe functions, that were the artifacts of using union s instead of struct ures or enum s. I never used or even encountered the unions before, so I wanted to learn about them. It proved to be an interesting journey, where I also revisited other Rust topic