Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 36 insertions, 0 deletions

diff --git a/tests/ui/traits/multidispatch-infer-convert-target.rs b/tests/ui/traits/multidispatch-infer-convert-target.rs
new file mode 100644
index 000000000..626e1ae71
--- /dev/null
+++ b/tests/ui/traits/multidispatch-infer-convert-target.rs
@@ -0,0 +1,36 @@
+// run-pass
+// Test that we can infer the Target based on the Self or vice versa.
+
+
+use std::mem;
+
+trait Convert<Target> {
+    fn convert(&self) -> Target;
+}
+
+impl Convert<u32> for i16 {
+    fn convert(&self) -> u32 {
+        *self as u32
+    }
+}
+
+impl Convert<i16> for u32 {
+    fn convert(&self) -> i16 {
+        *self as i16
+    }
+}
+
+fn test<T,U>(_: T, _: U, t_size: usize, u_size: usize)
+where T : Convert<U>
+{
+    assert_eq!(mem::size_of::<T>(), t_size);
+    assert_eq!(mem::size_of::<U>(), u_size);
+}
+
+fn main() {
+    // T = i16, U = u32
+    test(22_i16, Default::default(),  2, 4);
+
+    // T = u32, U = i16
+    test(22_u32, Default::default(), 4, 2);
+}