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/associated-types/associated-types-return.rs b/src/test/ui/associated-types/associated-types-return.rs
new file mode 100644
index 000000000..997a48b03
--- /dev/null
+++ b/src/test/ui/associated-types/associated-types-return.rs
@@ -0,0 +1,46 @@
+// run-pass
+// Test equality constraints on associated types in a where clause.
+
+
+pub trait Foo {
+    type A;
+    fn boo(&self) -> <Self as Foo>::A;
+}
+
+#[derive(PartialEq, Debug)]
+pub struct Bar;
+
+impl Foo for isize {
+    type A = usize;
+    fn boo(&self) -> usize { 42 }
+}
+
+impl Foo for Bar {
+    type A = isize;
+    fn boo(&self) -> isize { 43 }
+}
+
+impl Foo for char {
+    type A = Bar;
+    fn boo(&self) -> Bar { Bar }
+}
+
+fn foo1<I: Foo<A=Bar>>(x: I) -> Bar {
+    x.boo()
+}
+
+fn foo2<I: Foo>(x: I) -> <I as Foo>::A {
+    x.boo()
+}
+
+pub fn main() {
+    let a = 42;
+    assert_eq!(foo2(a), 42);
+
+    let a = Bar;
+    assert_eq!(foo2(a), 43);
+
+    let a = 'a';
+    foo1(a);
+    assert_eq!(foo2(a), Bar);
+}