Function main

10_smart_pointers/rust/rc.rs:3–30

()

use std::rc::Rc;

fn main() {
    let rc_examples = "Rc examples".to_string();
    // new scope
    {
        println!("--- rc_a is created ---");

        let rc_a: Rc<String> = Rc::new(rc_examples);
        println!("Reference Count of rc_a: {}", Rc::strong_count(&rc_a));

        // one more scope
        {
            let rc_b: Rc<String> = Rc::clone(&rc_a);
            println!("Ref Count of rc_b: {}", Rc::strong_count(&rc_b));
            println!("Ref Count of rc_a: {}", Rc::strong_count(&rc_a));

            // Two `Rc`s are equal if their inner values are equal
            println!("rc_a and rc_b are equal: {}", rc_a.eq(&rc_b));

            // We can use methods of a value directly
            println!("Length of the value inside rc_a: {}", rc_a.len());
            println!("Value of rc_b: {}", rc_b);
        }

        println!("Reference Count of rc_a: {}", Rc::strong_count(&rc_a));

        println!("--- rc_a is dropped out of scope ---");
    }
}