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, 98 insertions, 0 deletions

diff --git a/src/test/ui/specialization/specialization-basics.rs b/src/test/ui/specialization/specialization-basics.rs
new file mode 100644
index 000000000..721c934db
--- /dev/null
+++ b/src/test/ui/specialization/specialization-basics.rs
@@ -0,0 +1,98 @@
+// run-pass
+
+#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+
+// Tests a variety of basic specialization scenarios and method
+// dispatch for them.
+
+trait Foo {
+    fn foo(&self) -> &'static str;
+}
+
+impl<T> Foo for T {
+    default fn foo(&self) -> &'static str {
+        "generic"
+    }
+}
+
+impl<T: Clone> Foo for T {
+    default fn foo(&self) -> &'static str {
+        "generic Clone"
+    }
+}
+
+impl<T, U> Foo for (T, U) where T: Clone, U: Clone {
+    default fn foo(&self) -> &'static str {
+        "generic pair"
+    }
+}
+
+impl<T: Clone> Foo for (T, T) {
+    default fn foo(&self) -> &'static str {
+        "generic uniform pair"
+    }
+}
+
+impl Foo for (u8, u32) {
+    default fn foo(&self) -> &'static str {
+        "(u8, u32)"
+    }
+}
+
+impl Foo for (u8, u8) {
+    default fn foo(&self) -> &'static str {
+        "(u8, u8)"
+    }
+}
+
+impl<T: Clone> Foo for Vec<T> {
+    default fn foo(&self) -> &'static str {
+        "generic Vec"
+    }
+}
+
+impl Foo for Vec<i32> {
+    fn foo(&self) -> &'static str {
+        "Vec<i32>"
+    }
+}
+
+impl Foo for String {
+    fn foo(&self) -> &'static str {
+        "String"
+    }
+}
+
+impl Foo for i32 {
+    fn foo(&self) -> &'static str {
+        "i32"
+    }
+}
+
+struct NotClone;
+
+trait MyMarker {}
+impl<T: Clone + MyMarker> Foo for T {
+    default fn foo(&self) -> &'static str {
+        "generic Clone + MyMarker"
+    }
+}
+
+#[derive(Clone)]
+struct MarkedAndClone;
+impl MyMarker for MarkedAndClone {}
+
+fn  main() {
+    assert!(NotClone.foo() == "generic");
+    assert!(0u8.foo() == "generic Clone");
+    assert!(vec![NotClone].foo() == "generic");
+    assert!(vec![0u8].foo() == "generic Vec");
+    assert!(vec![0i32].foo() == "Vec<i32>");
+    assert!(0i32.foo() == "i32");
+    assert!(String::new().foo() == "String");
+    assert!(((), 0).foo() == "generic pair");
+    assert!(((), ()).foo() == "generic uniform pair");
+    assert!((0u8, 0u32).foo() == "(u8, u32)");
+    assert!((0u8, 0u8).foo() == "(u8, u8)");
+    assert!(MarkedAndClone.foo() == "generic Clone + MyMarker");
+}