Earlier quoted context omitted.
It's my bad I thought I could remove the mod.rs that just redeclares the submodules in my case.
If you'd like to have two modules, `main.rs` and `foo/bar.rs`, and you want the latter to be `foo::bar`, you can do this in `main.rs` to avoid needing a foo.rs that just does `mod bar;`: mod foo { mod bar; }
I was just following the example from the docs, my use case is more like this:
.
├── lib.rs
└── foo/
└── mod.rs
└── one.rs
└── two.rs
└── three.rs
└── four.rs
└── bar/
└── mod.rs
└── one.rs
└── two.rs
└── three.rs
└── four.rs