69 lines
1.3 KiB
Rust
69 lines
1.3 KiB
Rust
// Test that move restrictions are enforced on overloaded binary operations
|
|
|
|
use std::ops::Add;
|
|
|
|
fn double_move<T: Add<Output=()>>(x: T) {
|
|
x
|
|
+
|
|
x; //~ ERROR: use of moved value
|
|
}
|
|
|
|
fn move_then_borrow<T: Add<Output=()> + Clone>(x: T) {
|
|
x
|
|
+
|
|
x.clone(); //~ ERROR: borrow of moved value
|
|
}
|
|
|
|
fn move_borrowed<T: Add<Output=()>>(x: T, mut y: T) {
|
|
let m = &x;
|
|
let n = &mut y;
|
|
|
|
x //~ ERROR: cannot move out of `x` because it is borrowed
|
|
+
|
|
y; //~ ERROR: cannot move out of `y` because it is borrowed
|
|
use_mut(n); use_imm(m);
|
|
}
|
|
fn illegal_dereference<T: Add<Output=()>>(mut x: T, y: T) {
|
|
let m = &mut x;
|
|
let n = &y;
|
|
|
|
*m //~ ERROR: cannot move
|
|
+
|
|
*n; //~ ERROR: cannot move
|
|
use_imm(n); use_mut(m);
|
|
}
|
|
struct Foo;
|
|
|
|
impl<'a, 'b> Add<&'b Foo> for &'a mut Foo {
|
|
type Output = ();
|
|
|
|
fn add(self, _: &Foo) {}
|
|
}
|
|
|
|
impl<'a, 'b> Add<&'b mut Foo> for &'a Foo {
|
|
type Output = ();
|
|
|
|
fn add(self, _: &mut Foo) {}
|
|
}
|
|
|
|
fn mut_plus_immut() {
|
|
let mut f = Foo;
|
|
|
|
&mut f
|
|
+
|
|
&f; //~ ERROR: cannot borrow `f` as immutable because it is also borrowed as mutable
|
|
}
|
|
|
|
fn immut_plus_mut() {
|
|
let mut f = Foo;
|
|
|
|
&f
|
|
+
|
|
&mut f; //~ ERROR: cannot borrow `f` as mutable because it is also borrowed as immutable
|
|
}
|
|
|
|
fn main() {}
|
|
|
|
fn use_mut<T>(_: &mut T) { }
|
|
fn use_imm<T>(_: &T) { }
|