From 2eff282aef12ebbe848ed6841a0a7a39964b27b6 Mon Sep 17 00:00:00 2001
From: Andrew Cann <shum@canndrew.org>
Date: Wed, 10 Aug 2016 22:22:45 +0800
Subject: [PATCH] Add some tests for ! type

---
 .../compile-fail/return-from-diverging.rs     | 17 ++++++++++++
 .../return-unit-from-diverging.rs             | 17 ++++++++++++
 src/test/run-fail/return-never-coerce.rs      | 26 +++++++++++++++++++
 3 files changed, 60 insertions(+)
 create mode 100644 src/test/compile-fail/return-from-diverging.rs
 create mode 100644 src/test/compile-fail/return-unit-from-diverging.rs
 create mode 100644 src/test/run-fail/return-never-coerce.rs

diff --git a/src/test/compile-fail/return-from-diverging.rs b/src/test/compile-fail/return-from-diverging.rs
new file mode 100644
index 000000000000..1221e1097014
--- /dev/null
+++ b/src/test/compile-fail/return-from-diverging.rs
@@ -0,0 +1,17 @@
+// Copyright 2014 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 fail() -> ! {
+    return "wow"; //~ ERROR mismatched types
+}
+
+fn main() {
+}
+
diff --git a/src/test/compile-fail/return-unit-from-diverging.rs b/src/test/compile-fail/return-unit-from-diverging.rs
new file mode 100644
index 000000000000..6b66c75582c4
--- /dev/null
+++ b/src/test/compile-fail/return-unit-from-diverging.rs
@@ -0,0 +1,17 @@
+// Copyright 2014 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 fail() -> ! {
+    return; //~ ERROR in a function whose return type is not
+}
+
+fn main() {
+}
+
diff --git a/src/test/run-fail/return-never-coerce.rs b/src/test/run-fail/return-never-coerce.rs
new file mode 100644
index 000000000000..15e4834df881
--- /dev/null
+++ b/src/test/run-fail/return-never-coerce.rs
@@ -0,0 +1,26 @@
+// Copyright 2014 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:aah!
+
+fn call_another_fn<T, F: FnOnce() -> T>(f: F) -> T {
+    f()
+}
+
+fn wub() -> ! {
+    panic!("aah!");
+}
+
+fn main() {
+    let x: i32 = call_another_fn(wub);
+    let y: u32 = wub();
+}
+
+