1 files changed, 39 insertions, 0 deletions
diff --git a/tests/ui/rfc-1445-restrict-constants-in-patterns/feature-gate.rs b/tests/ui/rfc-1445-restrict-constants-in-patterns/feature-gate.rs
new file mode 100644
index 000000000..ee6674097
--- /dev/null
+++ b/tests/ui/rfc-1445-restrict-constants-in-patterns/feature-gate.rs
@@ -0,0 +1,39 @@
+// Test that use of structural-match traits is only permitted with a feature gate,
+// and that if a feature gate is supplied, it permits the type to be
+// used in a match.
+
+// revisions: with_gate no_gate
+
+// gate-test-structural_match
+
+#![allow(unused)]
+#![feature(rustc_attrs)]
+#![cfg_attr(with_gate, feature(structural_match))]
+
+
+struct Foo {
+    x: u32
+}
+
+const FOO: Foo = Foo { x: 0 };
+
+#[rustc_error]
+fn main() { //[with_gate]~ ERROR fatal error triggered by #[rustc_error]
+    let y = Foo { x: 1 };
+    match y {
+        FOO => { }
+        _ => { }
+    }
+}
+
+impl std::marker::StructuralPartialEq for Foo { }
+//[no_gate]~^ ERROR use of unstable library feature 'structural_match'
+impl std::marker::StructuralEq for Foo { }
+//[no_gate]~^ ERROR use of unstable library feature 'structural_match'
+
+impl PartialEq<Foo> for Foo {
+    fn eq(&self, other: &Self) -> bool {
+        self.x == other.x
+    }
+}
+impl Eq for Foo { }