1 // Test how overloaded deref interacts with borrows when DerefMut
4 use std::ops::{Deref, DerefMut};
10 impl<T> Deref for Own<T> {
13 fn deref<'a>(&'a self) -> &'a T {
14 unsafe { &*self.value }
18 impl<T> DerefMut for Own<T> {
19 fn deref_mut<'a>(&'a mut self) -> &'a mut T {
20 unsafe { &mut *self.value }
24 fn deref_imm(x: Own<isize>) {
28 fn deref_mut1(x: Own<isize>) {
29 let __isize = &mut *x; //~ ERROR cannot borrow
32 fn deref_mut2(mut x: Own<isize>) {
33 let __isize = &mut *x;
36 fn deref_extend<'a>(x: &'a Own<isize>) -> &'a isize {
40 fn deref_extend_mut1<'a>(x: &'a Own<isize>) -> &'a mut isize {
41 &mut **x //~ ERROR cannot borrow
44 fn deref_extend_mut2<'a>(x: &'a mut Own<isize>) -> &'a mut isize {
48 fn assign1<'a>(x: Own<isize>) {
49 *x = 3; //~ ERROR cannot borrow
52 fn assign2<'a>(x: &'a Own<isize>) {
53 **x = 3; //~ ERROR cannot borrow
56 fn assign3<'a>(x: &'a mut Own<isize>) {