Add a warning feature gate for int/uint in types and i/u suffixes.

src/test/compile-fail/feature-gate-int-uint.rs

@@ -0,0 +1,35 @@
+// 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.
+
+#![allow(dead_code)]
+
+mod u {
+    type X = uint; //~ WARN the `uint` type is deprecated
+    struct Foo {
+        x: uint //~ WARN the `uint` type is deprecated
+    }
+    fn bar(x: uint) { //~ WARN the `uint` type is deprecated
+        1u; //~ WARN the `u` suffix on integers is deprecated
+    }
+}
+mod i {
+    type X = int; //~ WARN the `int` type is deprecated
+    struct Foo {
+        x: int //~ WARN the `int` type is deprecated
+    }
+    fn bar(x: int) { //~ WARN the `int` type is deprecated
+        1i; //~ WARN the `u` suffix on integers is deprecated
+    }
+}
+
+fn main() {
+    // make compilation fail, after feature gating
+    let () = 1u8; //~ ERROR
+}