Added a test for #[cfg] on non-optional positions

1 files changed, 18 insertions, 0 deletions

diff --git a/src/test/compile-fail/cfg-non-opt-expr.rs b/src/test/compile-fail/cfg-non-opt-expr.rs
new file mode 100644
index 00000000000..d9d379ddc7d
--- /dev/null
+++ b/src/test/compile-fail/cfg-non-opt-expr.rs
@@ -0,0 +1,18 @@
+// 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.
+
+fn main() {
+    let _ = #[cfg(unset)] ();
+    //~^ ERROR removing an expression is not supported in this position
+    let _ = 1 + 2 + #[cfg(unset)] 3;
+    //~^ ERROR removing an expression is not supported in this position
+    let _ = [1, 2, 3][#[cfg(unset)] 1];
+    //~^ ERROR removing an expression is not supported in this position
+}