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, 46 insertions, 0 deletions

diff --git a/src/test/ui/higher-rank-trait-bounds/hrtb-type-outlives.rs b/src/test/ui/higher-rank-trait-bounds/hrtb-type-outlives.rs
new file mode 100644
index 000000000..88d396101
--- /dev/null
+++ b/src/test/ui/higher-rank-trait-bounds/hrtb-type-outlives.rs
@@ -0,0 +1,46 @@
+// run-pass
+#![allow(dead_code)]
+#![allow(unused_variables)]
+// Test what happens when a HR obligation is applied to an impl with
+// "outlives" bounds. Currently we're pretty conservative here; this
+// will probably improve in time.
+
+trait Foo<X> {
+    fn foo(&self, x: X) { }
+}
+
+fn want_foo<T>()
+    where T : for<'a> Foo<&'a isize>
+{
+}
+
+// Expressed as a where clause
+
+struct SomeStruct<X> {
+    x: X
+}
+
+impl<'a,X> Foo<&'a isize> for SomeStruct<X>
+    where X : 'a
+{
+}
+
+fn one() {
+    want_foo::<SomeStruct<usize>>();
+}
+
+// Expressed as shorthand
+
+struct AnotherStruct<X> {
+    x: X
+}
+
+impl<'a,X:'a> Foo<&'a isize> for AnotherStruct<X>
+{
+}
+
+fn two() {
+    want_foo::<AnotherStruct<usize>>();
+}
+
+fn main() { }