Merging upstream version 1.68.2+dfsg1.

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

1 files changed, 41 insertions, 0 deletions

diff --git a/tests/ui/variance/variance-types.rs b/tests/ui/variance/variance-types.rs
new file mode 100644
index 000000000..b9b6d9c9b
--- /dev/null
+++ b/tests/ui/variance/variance-types.rs
@@ -0,0 +1,41 @@
+#![allow(dead_code)]
+#![feature(rustc_attrs)]
+
+use std::cell::Cell;
+
+// Check that a type parameter which is only used in a trait bound is
+// not considered bivariant.
+
+#[rustc_variance]
+struct InvariantMut<'a,A:'a,B:'a> { //~ ERROR [-, o, o]
+    t: &'a mut (A,B)
+}
+
+#[rustc_variance]
+struct InvariantCell<A> { //~ ERROR [o]
+    t: Cell<A>
+}
+
+#[rustc_variance]
+struct InvariantIndirect<A> { //~ ERROR [o]
+    t: InvariantCell<A>
+}
+
+#[rustc_variance]
+struct Covariant<A> { //~ ERROR [+]
+    t: A, u: fn() -> A
+}
+
+#[rustc_variance]
+struct Contravariant<A> { //~ ERROR [-]
+    t: fn(A)
+}
+
+#[rustc_variance]
+enum Enum<A,B,C> { //~ ERROR [+, -, o]
+    Foo(Covariant<A>),
+    Bar(Contravariant<B>),
+    Zed(Covariant<C>,Contravariant<C>)
+}
+
+pub fn main() { }