1 files changed, 117 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-closures-slice-patterns-ok.rs b/src/test/ui/borrowck/borrowck-closures-slice-patterns-ok.rs
new file mode 100644
index 000000000..0229ca37a
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-closures-slice-patterns-ok.rs
@@ -0,0 +1,117 @@
+// Check that closure captures for slice patterns are inferred correctly
+
+#![allow(unused_variables)]
+
+// run-pass
+
+fn arr_by_ref(x: [String; 3]) {
+    let r = &x;
+    let f = || {
+        let [ref y, ref z @ ..] = x;
+    };
+    f();
+    f();
+    // Ensure `x` was borrowed
+    drop(r);
+    // Ensure that `x` wasn't moved from.
+    drop(x);
+}
+
+fn arr_by_mut(mut x: [String; 3]) {
+    let mut f = || {
+        let [ref mut y, ref mut z @ ..] = x;
+    };
+    f();
+    f();
+    drop(x);
+}
+
+fn arr_by_move(x: [String; 3]) {
+    let f = || {
+        let [y, z @ ..] = x;
+    };
+    f();
+}
+
+fn arr_ref_by_ref(x: &[String; 3]) {
+    let r = &x;
+    let f = || {
+        let [ref y, ref z @ ..] = *x;
+    };
+    let g = || {
+        let [y, z @ ..] = x;
+    };
+    f();
+    g();
+    f();
+    g();
+    drop(r);
+    drop(x);
+}
+
+fn arr_ref_by_mut(x: &mut [String; 3]) {
+    let mut f = || {
+        let [ref mut y, ref mut z @ ..] = *x;
+    };
+    f();
+    f();
+    let mut g = || {
+        let [y, z @ ..] = x;
+        // Ensure binding mode was chosen correctly:
+        std::mem::swap(y, &mut z[0]);
+    };
+    g();
+    g();
+    drop(x);
+}
+
+fn arr_box_by_move(x: Box<[String; 3]>) {
+    let f = || {
+        let [y, z @ ..] = *x;
+    };
+    f();
+}
+
+fn slice_by_ref(x: &[String]) {
+    let r = &x;
+    let f = || {
+        if let [ref y, ref z @ ..] = *x {}
+    };
+    let g = || {
+        if let [y, z @ ..] = x {}
+    };
+    f();
+    g();
+    f();
+    g();
+    drop(r);
+    drop(x);
+}
+
+fn slice_by_mut(x: &mut [String]) {
+    let mut f = || {
+        if let [ref mut y, ref mut z @ ..] = *x {}
+    };
+    f();
+    f();
+    let mut g = || {
+        if let [y, z @ ..] = x {
+            // Ensure binding mode was chosen correctly:
+            std::mem::swap(y, &mut z[0]);
+        }
+    };
+    g();
+    g();
+    drop(x);
+}
+
+fn main() {
+    arr_by_ref(Default::default());
+    arr_by_mut(Default::default());
+    arr_by_move(Default::default());
+    arr_ref_by_ref(&Default::default());
+    arr_ref_by_mut(&mut Default::default());
+    arr_box_by_move(Default::default());
+    slice_by_ref(&<[_; 3]>::default());
+    slice_by_mut(&mut <[_; 3]>::default());
+}