Function alloc::rc::get_mut
[−]
[src]
pub fn get_mut<T>(rc: &mut Rc<T>) -> Option<&mut T>
Unstable
Returns a mutable reference to the contained value if the Rc<T>
`Rc
Returns None
`Noneif the
` if the Rc<T>
`Rc
Examples
use std::rc::{self, Rc}; let mut x = Rc::new(3); *rc::get_mut(&mut x).unwrap() = 4; assert_eq!(*x, 4); let _y = x.clone(); assert!(rc::get_mut(&mut x).is_none());