21/11/22 21:10:18.70 ejqG4gpN.net
>>216
プログラマを守るためそれをさせないのがRustっていう言語ではｗ
Rc<RefCell>ではいかんの？
URLﾘﾝｸ(play.rust-lang.org)
fn main() {
use std::collections::LinkedList;
use std::rc::Rc;
use std::cell::RefCell;
let mut list: LinkedList<Rc<RefCell<i32>>> = LinkedList::new();
list.push_back(Rc::new(RefCell::new(1)));
list.push_back(Rc::new(RefCell::new(2)));
list.push_back(Rc::new(RefCell::new(3)));
println!("{:?}", list); // [RefCell { value: 1 }, RefCell { value: 2 }, RefCell { value: 3 }]
let mut vec: Vec<Rc<RefCell<i32>>> = Vec::new();
let mut it = list.iter();
vec.push(Rc::clone(it.next().unwrap()));
vec.push(Rc::clone(it.next().unwrap()));
vec.push(Rc::clone(it.next().unwrap()));
println!("{:?}", vec); // [RefCell { value: 1 }, RefCell { value: 2 }, RefCell { value: 3 }]
println!("{:?}", vec[1]); // RefCell { value: 2 }
*vec[1].borrow_mut() = 22;
println!("{:?}", vec[1]); // RefCell { value: 22 }
println!("{:?}", list); // [RefCell { value: 1 }, RefCell { value: 2 }, RefCell { value: 3 }]
println!("{:?}", vec); // [RefCell { value: 1 }, RefCell { value: 2 }, RefCell { value: 3 }]
}