Code shared from the Rust Playground

playground.rs

struct MyType {
   value: u32 
}

fn new_type() -> MyType {
    MyType {
        value: 1
    }
}

impl MyType {
    fn mv_immutable(self) {}
    fn mv_mutable(mut self) {
        self.value = 2;
    }
    fn ref_immutable(&self) {}
    fn ref_mutable(&mut self) {
        self.value = 3;
    }
}

fn main() {
    // create owned value and store in `a`
    let a = MyType{ value:3 };
    // destroy `a` by moving its value into its `mv_immutable` function
    a.mv_immutable();

    // create owned value and store it in `b`
    let b = new_type();
    // destroy `b` by moving its value mutably into the `mv_mutable` function
    // note that `b` isn't `mut`, it doesn't need to be; since there can only be one owner of a value,
    // we can make the value mutable as it is moved
    b.mv_mutable();

    // create owned value and store in `c`
    let c = new_type();
    // pass an immutable reference to the its `ref_immutable` function
    c.ref_immutable();
    c.ref_immutable();

    // create owned value and store it in `d`
    let mut d = new_type();
    // pass a mutable reference to its `ref_mutable` function
    d.ref_mutable();
    d.ref_mutable();
}