Rust

7.6    Solutions

This section provides the code solutions for the practice exercises in Section 7.5. The code is largely self-explanatory; however, we have included comments and additional explanations wherever necessary to enhance understanding.

1. Handling struct and enum visibility in Rust modules

   mod m1 {    struct A {        d: m2::D,    }    mod m2 {        pub enum D { // Child module items are not visible to parent module                      // by default            B,            C,        }    }}fn main(){}  

2. Resolving module imports and visibility in Rust

   mod m1 {    struct A {        d: m2::D,    }    pub mod m2 {    /* Public items of a private child module are only accessible by        parent module. we need to make the child module m2 pub, so that        its public items can be used outside the parent module. */        pub enum D {            B,