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, 21 insertions, 0 deletions

diff --git a/src/test/ui/builtin-superkinds/builtin-superkinds-capabilities.rs b/src/test/ui/builtin-superkinds/builtin-superkinds-capabilities.rs
new file mode 100644
index 000000000..e936f921a
--- /dev/null
+++ b/src/test/ui/builtin-superkinds/builtin-superkinds-capabilities.rs
@@ -0,0 +1,21 @@
+// run-pass
+// Tests "capabilities" granted by traits that inherit from super-
+// builtin-kinds, e.g., if a trait requires Send to implement, then
+// at usage site of that trait, we know we have the Send capability.
+
+
+use std::sync::mpsc::{channel, Sender, Receiver};
+
+trait Foo : Send { }
+
+impl <T: Send> Foo for T { }
+
+fn foo<T: Foo + 'static>(val: T, chan: Sender<T>) {
+    chan.send(val).unwrap();
+}
+
+pub fn main() {
+    let (tx, rx): (Sender<isize>, Receiver<isize>) = channel();
+    foo(31337, tx);
+    assert_eq!(rx.recv().unwrap(), 31337);
+}