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-rw-r--r--tests/ui/augmented-assignments.rs27
1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/augmented-assignments.rs b/tests/ui/augmented-assignments.rs
new file mode 100644
index 000000000..20c7fb3a9
--- /dev/null
+++ b/tests/ui/augmented-assignments.rs
@@ -0,0 +1,27 @@
+use std::ops::AddAssign;
+
+struct Int(i32);
+
+impl AddAssign for Int {
+ fn add_assign(&mut self, _: Int) {
+ unimplemented!()
+ }
+}
+
+fn main() {
+ let mut x = Int(1);
+ x
+ //~^ NOTE borrow of `x` occurs here
+ +=
+ x;
+ //~^ ERROR cannot move out of `x` because it is borrowed
+ //~| move out of `x` occurs here
+
+ let y = Int(2);
+ //~^ HELP consider changing this to be mutable
+ //~| SUGGESTION mut
+ y //~ ERROR cannot borrow `y` as mutable, as it is not declared as mutable
+ //~| cannot borrow as mutable
+ +=
+ Int(1);
+}