Test binops move semantics

Author: Jorge Aparicio

src/test/compile-fail/binop-move-semantics.rs

@@ -0,0 +1,69 @@
+// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Test that move restrictions are enforced on overloaded binary operations
+
+fn double_move<T: Add<T, ()>>(x: T) {
+    x
+    +
+    x;  //~ ERROR: use of moved value
+}
+
+fn move_then_borrow<T: Add<T, ()> + Clone>(x: T) {
+    x
+    +
+    x.clone();  //~ ERROR: use of moved value
+}
+
+fn move_borrowed<T: Add<T, ()>>(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
+}
+
+fn illegal_dereference<T: Add<T, ()>>(mut x: T, y: T) {
+    let m = &mut x;
+    let n = &y;
+
+    *m  //~ ERROR: cannot move out of dereference of `&mut`-pointer
+    +
+    *n;  //~ ERROR: cannot move out of dereference of `&`-pointer
+}
+
+struct Foo;
+
+impl<'a, 'b> Add<&'b Foo, ()> for &'a mut Foo {
+    fn add(self, _: &Foo) {}
+}
+
+impl<'a, 'b> Add<&'b mut Foo, ()> for &'a Foo {
+    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() {}