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// 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) { }
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