Add tests for ! type

src/test/run-fail/call-fn-never-arg.rs

@@ -0,0 +1,23 @@
+// Copyright 2012 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.
+
+// error-pattern:wowzers!
+
+#![feature(never_type)]
+#![allow(unreachable_code)]
+
+fn foo(x: !) -> ! {
+    x
+}
+
+fn main() {
+    foo(panic!("wowzers!"))
+}
+

src/test/run-fail/never-associated-type.rs

@@ -0,0 +1,32 @@
+// Copyright 2012 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(never_type)]
+
+// error-pattern:kapow!
+
+trait Foo {
+    type Wow;
+
+    fn smeg(&self) -> Self::Wow;
+}
+
+struct Blah;
+impl Foo for Blah {
+    type Wow = !;
+    fn smeg(&self) -> ! {
+        panic!("kapow!");
+    }
+}
+
+fn main() {
+    Blah.smeg();
+}
+

src/test/run-fail/never-type-arg.rs

@@ -0,0 +1,26 @@
+// Copyright 2012 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.
+
+// error-pattern:oh no!
+
+#![feature(never_type)]
+
+struct Wub;
+
+impl PartialEq<!> for Wub {
+    fn eq(&self, other: &!) -> bool {
+        *other
+    }
+}
+
+fn main() {
+    let _ = Wub == panic!("oh no!");
+}
+