vis_example.rs

pub mod references {
    pub mod psi_ref {

        // Unit like struct, the type with only one member
        pub struct Ref;

        impl Ref {
            pub fn resolve(&self) -> &Ref {
                // resolve is not pub, but we can use anything from the parent module's scope
                super::resolve::do_resolve(self)
            }
        }
    }

    // Note that there is no `pub` here.
    mod resolve {
        use super::psi_ref::Ref;

        pub fn do_resolve(r: &Ref) -> &Ref {
            r
        }
    }
}




fn main() {
    use references::psi_ref::Ref;

    let r = Ref;

    // can call resolve via ref
    r.resolve();

    // this fails, because mod resolve is not pub
    // references::resolve::do_resolve(&r);
}