New upstream version 1.52.1+dfsg1

[rustc.git] / src / tools / clippy / tests / ui / clone_on_copy_mut.rs

diff --git a/src/tools/clippy/tests/ui/clone_on_copy_mut.rs b/src/tools/clippy/tests/ui/clone_on_copy_mut.rs
new file mode 100644 (file)
index 0000000..5bfa256
--- /dev/null
+++ b/src/tools/clippy/tests/ui/clone_on_copy_mut.rs
@@ -0,0 +1,18 @@
+pub fn dec_read_dec(i: &mut i32) -> i32 {
+    *i -= 1;
+    let ret = *i;
+    *i -= 1;
+    ret
+}
+
+pub fn minus_1(i: &i32) -> i32 {
+    dec_read_dec(&mut i.clone())
+}
+
+fn main() {
+    let mut i = 10;
+    assert_eq!(minus_1(&i), 9);
+    assert_eq!(i, 10);
+    assert_eq!(dec_read_dec(&mut i), 9);
+    assert_eq!(i, 8);
+}