Add tests

tests/ui/pattern/bindings-after-at/bind-by-copy.rs

@@ -1,13 +1,29 @@
-// run-pass
+#![allow(unused)]
 
 // Test copy
 
-struct A { a: i32, b: i32 }
-struct B { a: i32, b: C }
-struct D { a: i32, d: C }
-#[derive(Copy,Clone)]
-struct C { c: i32 }
+struct A {
+    a: i32,
+    b: i32,
+}
+struct B {
+    a: i32,
+    b: C,
+}
+struct D {
+    a: i32,
+    d: C,
+}
+#[derive(Copy, Clone)]
+struct C {
+    c: i32,
+}
+enum E {
+    E { a: i32, e: C },
+    NotE,
+}
 
+#[rustfmt::skip]
 pub fn main() {
     match (A {a: 10, b: 20}) {
         x@A {a, b: 20} => { assert!(x.a == 10); assert!(a == 10); }
@@ -23,6 +39,25 @@ pub fn main() {
     y.d.c = 30;
     assert_eq!(d.c, 20);
 
+    match (E::E { a: 10, e: C { c: 20 } }) {
+        x @ E::E{ a, e: C { c } } => {
+            //~^ ERROR use of moved value
+            assert!(matches!(x, E::E { a: 10, e: C { c: 20 } }));
+            assert!(a == 10);
+            assert!(c == 20);
+        }
+        _ => panic!(),
+    }
+    match (E::E { a: 10, e: C { c: 20 } }) {
+        mut x @ E::E{ a, e: C { mut c } } => {
+            //~^ ERROR use of moved value
+            x = E::NotE;
+            c += 30;
+            assert_eq!(c, 50);
+        }
+        _ => panic!(),
+    }
+
     let some_b = Some(B { a: 10, b: C { c: 20 } });
 
     // in irrefutable pattern