Implementation of RFC 2086 - Allow Irrefutable Let patterns

1 files changed, 22 insertions, 0 deletions

diff --git a/src/test/run-pass/allow_irrefutable_let_patterns.rs b/src/test/run-pass/allow_irrefutable_let_patterns.rs
new file mode 100644
index 00000000000..3a4f226dfe6
--- /dev/null
+++ b/src/test/run-pass/allow_irrefutable_let_patterns.rs
@@ -0,0 +1,22 @@
+// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(irrefutable_let_pattern)]
+
+// must-compile-successfully-irrefutable_let_pattern_with_gate
+fn main() {
+    #[allow(irrefutable_let_pattern)]
+    if let _ = 5 {}
+
+    #[allow(irrefutable_let_pattern)]
+    while let _ = 5 {
+        break;
+    }
+}