rustHow do I share a variable between structs in Rust?

You can share a variable between structs in Rust by using a reference. A reference is a type of pointer that allows you to refer to a value without taking ownership of it. To create a reference, use the & operator.

struct Foo {
    x: i32,
}

struct Bar {
    y: &Foo,
}

fn main() {
    let foo = Foo { x: 10 };
    let bar = Bar { y: &foo };
    println!("{}", bar.y.x);
}

Output example

10

Code explanation

1. struct Foo { x: i32, } - This creates a struct called Foo with a field x of type i32.
2. struct Bar { y: &Foo, } - This creates a struct called Bar with a field y of type &Foo, which is a reference to a Foo struct.
3. let foo = Foo { x: 10 }; - This creates a Foo struct with the value of x set to 10.
4. let bar = Bar { y: &foo }; - This creates a Bar struct with the value of y set to a reference of the foo struct.
5. println!("{}", bar.y.x); - This prints the value of x from the foo struct, which is 10.

Helpful links

• Rust Reference
• Rust Ownership

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