summaryrefslogtreecommitdiffstats
path: root/src/test/ui/traits/inheritance/cast.rs
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/traits/inheritance/cast.rs
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/traits/inheritance/cast.rs')
-rw-r--r--src/test/ui/traits/inheritance/cast.rs33
1 files changed, 33 insertions, 0 deletions
diff --git a/src/test/ui/traits/inheritance/cast.rs b/src/test/ui/traits/inheritance/cast.rs
new file mode 100644
index 000000000..9070b9d1f
--- /dev/null
+++ b/src/test/ui/traits/inheritance/cast.rs
@@ -0,0 +1,33 @@
+// run-pass
+#![allow(dead_code)]
+// Testing that supertrait methods can be called on subtrait object types
+
+
+trait Foo {
+ fn f(&self) -> isize;
+}
+
+trait Bar : Foo {
+ fn g(&self) -> isize;
+}
+
+struct A {
+ x: isize
+}
+
+impl Foo for A {
+ fn f(&self) -> isize { 10 }
+}
+
+impl Bar for A {
+ fn g(&self) -> isize { 20 }
+}
+
+pub fn main() {
+ let a = &A { x: 3 };
+ let afoo = a as &dyn Foo;
+ let abar = a as &dyn Bar;
+ assert_eq!(afoo.f(), 10);
+ assert_eq!(abar.g(), 20);
+ assert_eq!(abar.f(), 10);
+}