Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 48 insertions, 0 deletions

diff --git a/tests/ui/traits/trait-upcasting/replace-vptr.rs b/tests/ui/traits/trait-upcasting/replace-vptr.rs
new file mode 100644
index 000000000..9ccfc9306
--- /dev/null
+++ b/tests/ui/traits/trait-upcasting/replace-vptr.rs
@@ -0,0 +1,48 @@
+// run-pass
+
+#![feature(trait_upcasting)]
+
+trait A {
+    fn foo_a(&self);
+}
+
+trait B {
+    fn foo_b(&self);
+}
+
+trait C: A + B {
+    fn foo_c(&self);
+}
+
+struct S(i32);
+
+impl A for S {
+    fn foo_a(&self) {
+        unreachable!();
+    }
+}
+
+impl B for S {
+    fn foo_b(&self) {
+        assert_eq!(42, self.0);
+    }
+}
+
+impl C for S {
+    fn foo_c(&self) {
+        unreachable!();
+    }
+}
+
+fn invoke_inner(b: &dyn B) {
+    b.foo_b();
+}
+
+fn invoke_outer(c: &dyn C) {
+    invoke_inner(c);
+}
+
+fn main() {
+    let s = S(42);
+    invoke_outer(&s);
+}