Error code E0742
Visibility is restricted to a module which isn't an ancestor of the current item.
Erroneous code example:
pub mod sea {} pub (in crate::sea) struct Shark; // error! fn main() {}
To fix this error, we need to move the Shark
struct inside the sea
module:
pub mod sea { pub (in crate::sea) struct Shark; // ok! } fn main() {}
Of course, you can do it as long as the module you're referring to is an ancestor:
pub mod earth { pub mod sea { pub (in crate::earth) struct Shark; // ok! } } fn main() {}