| use std::cell::RefCell; | |
| fn main() { | |
| let m = RefCell::new(0); | |
| let mut b = m.borrow_mut(); | |
| let b1 = &mut *b; | |
| let b2 = &mut *b; //~ ERROR cannot borrow | |
| b1.use_mut(); | |
| } | |
| trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { } } | |
| impl<T> Fake for T { } |