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Update Ch15

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This commit is contained in:
Unisko PENG 2023-05-12 17:31:00 +08:00
parent 1ec35c1682
commit ee160e4af6
1 changed files with 12 additions and 3 deletions

15
projects/cons_list_demo/src/main.rs
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@ -11,10 +11,19 @@ use std::rc::Rc;
fn main() {
let value = Rc::new(RefCell::new(5));
let a = Rc::new(Cons(Rc::clone(&value), Rc::new(Nil)));
let a = Rc::new(Cons(
Rc::clone(&value),
Rc::new(Nil)
));
let b = Cons(Rc::new(RefCell::new(3)), Rc::clone(&a));
let c = Cons(Rc::new(RefCell::new(4)), Rc::clone(&a));
let b = Cons(
Rc::new(RefCell::new(3)),
Rc::clone(&a)
);
let c = Cons(
Rc::new(RefCell::new(4)),
Rc::clone(&a)
);
*value.borrow_mut() += 10;