[tialaramex]

Yeah, likewise Rust is completely fine after you say `mod foo` and have a file named foo.rs, if you also make a foo/ directory and put foo/whatever.rs and foo/something_else.rs that those are all part of the foo module.

Historically Rust wanted that foo.rs to be renamed foo/mod.rs but that's no longer idiomatic although of course it still works if you do that.

[dathinab]

to extend on this:

in rust crates are semantically one compilation unit (where in C oversimplified it's a .h/.c pair, and practically rustc will try to split it in some more units to speed up build time).

the reason I'm pointing this out is because many sources of "splitting a module across files" come from situations where 1 file is one compilation unit so you needed to have a way to split it (for organization) without splitting it (for compilation) in some sitation