tests

src/test/compile-fail/trait-impl-1.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.
+
+// Test calling methods on an impl for a bare trait. This test checks that the
+// trait impl is only applied to a trait object, not concrete types which implement
+// the trait.
+
+trait T {}
+
+impl<'a> T+'a {
+    fn foo(&self) {}
+}
+
+impl T for int {}
+
+fn main() {
+    let x = &42i;
+    x.foo(); //~ERROR: type `&int` does not implement any method in scope named `foo`
+}

src/test/compile-fail/trait-impl-2.rs

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+// 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.
+
+// Test calling methods on an impl for a bare trait. This test checks trait impls
+// must be in the same module as the trait.
+
+mod Foo {
+    trait T {}
+}
+
+mod Bar {
+    impl<'a> ::Foo::T+'a { //~ERROR: inherent implementations may only be implemented in the same
+        fn foo(&self) {}
+    }
+}
+
+fn main() {}

src/test/run-pass/trait-impl.rs

@@ -0,0 +1,36 @@
+// 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.
+
+// Test calling methods on an impl for a bare trait.
+
+static mut COUNT: uint = 1;
+
+trait T {}
+
+impl<'a> T+'a {
+    fn foo(&self) {
+        unsafe { COUNT *= 2; }
+    }
+    fn bar() {
+        unsafe { COUNT *= 3; }
+    }
+}
+
+impl T for int {}
+
+fn main() {
+    let x: &T = &42i;
+
+    x.foo();
+    T::foo(x);
+    T::bar();
+
+    unsafe { assert!(COUNT == 12); }
+}