[RUST/COMMON] RefCell 구조체 : borrow/borrow_mut 메소드 사용하기

icodebroker COMMON 2024-06-18

■ RefCell<T> 구조체의 borrow/borrow_mut 메소드를 사용하는 방법을 보여준다.

▶ 예제 코드 (RS)


use std::cell;
use std::rc;

fn main()
{
    let a_refcell : cell::RefCell<i32> = cell::RefCell::new(1000);

    let a_refcell_rc : rc::Rc<cell::RefCell<i32>> = rc::Rc::new(a_refcell);

    let b_refcell_rc : rc::Rc<cell::RefCell<i32>> = rc::Rc::clone(&a_refcell_rc);

    *b_refcell_rc.borrow_mut() += 100;

    println!("{}", a_refcell_rc.borrow());
}

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use std::cell;

use std::rc;

fn main()

{

let a_refcell : cell::RefCell<i32> = cell::RefCell::new(1000);

let a_refcell_rc : rc::Rc<cell::RefCell<i32>> = rc::Rc::new(a_refcell);

let b_refcell_rc : rc::Rc<cell::RefCell<i32>> = rc::Rc::clone(&a_refcell_rc);

*b_refcell_rc.borrow_mut() += 100;

println!("{}", a_refcell_rc.borrow());

}