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-rw-r--r--src/test/ui/borrowck/borrowck-loan-rcvr-overloaded-op.rs46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-loan-rcvr-overloaded-op.rs b/src/test/ui/borrowck/borrowck-loan-rcvr-overloaded-op.rs
new file mode 100644
index 000000000..4da10fd44
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-loan-rcvr-overloaded-op.rs
@@ -0,0 +1,46 @@
+use std::ops::Add;
+
+#[derive(Copy, Clone)]
+struct Point {
+ x: isize,
+ y: isize,
+}
+
+impl Add<isize> for Point {
+ type Output = isize;
+
+ fn add(self, z: isize) -> isize {
+ self.x + self.y + z
+ }
+}
+
+impl Point {
+ pub fn times(&self, z: isize) -> isize {
+ self.x * self.y * z
+ }
+}
+
+fn a() {
+ let mut p = Point {x: 3, y: 4};
+
+ // ok (we can loan out rcvr)
+ p + 3;
+ p.times(3);
+}
+
+fn b() {
+ let mut p = Point {x: 3, y: 4};
+
+ // Here I create an outstanding loan and check that we get conflicts:
+
+ let q = &mut p;
+
+ p + 3; //~ ERROR cannot use `p`
+ p.times(3); //~ ERROR cannot borrow `p`
+
+ *q + 3; // OK to use the new alias `q`
+ q.x += 1; // and OK to mutate it
+}
+
+fn main() {
+}