Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/src/test/ui/self/where-for-self.rs b/src/test/ui/self/where-for-self.rs
new file mode 100644
index 000000000..76c592dc4
--- /dev/null
+++ b/src/test/ui/self/where-for-self.rs
@@ -0,0 +1,51 @@
+// run-pass
+// Test that we can quantify lifetimes outside a constraint (i.e., including
+// the self type) in a where clause.
+
+
+static mut COUNT: u32 = 1;
+
+trait Bar<'a> {
+    fn bar(&self);
+}
+
+trait Baz<'a>
+{
+    fn baz(&self);
+}
+
+impl<'a, 'b> Bar<'b> for &'a u32 {
+    fn bar(&self) {
+        unsafe { COUNT *= 2; }
+    }
+}
+
+impl<'a, 'b> Baz<'b> for &'a u32 {
+    fn baz(&self) {
+        unsafe { COUNT *= 3; }
+    }
+}
+
+// Test we can use the syntax for HRL including the self type.
+fn foo1<T>(x: &T)
+    where for<'a, 'b> &'a T: Bar<'b>
+{
+    x.bar()
+}
+
+// Test we can quantify multiple bounds (i.e., the precedence is sensible).
+fn foo2<T>(x: &T)
+    where for<'a, 'b> &'a T: Bar<'b> + Baz<'b>
+{
+    x.baz();
+    x.bar()
+}
+
+fn main() {
+    let x = 42;
+    foo1(&x);
+    foo2(&x);
+    unsafe {
+        assert_eq!(COUNT, 12);
+    }
+}