Add rather involved run-pass test case.

Author: nikomatsakis

src/test/run-pass/associated-types-ref-from-struct.rs

@@ -0,0 +1,62 @@
+// 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 associated type references in structure fields.
+
+trait Test {
+    type V;
+
+    fn test(&self, value: &Self::V) -> bool;
+}
+
+///////////////////////////////////////////////////////////////////////////
+
+struct TesterPair<T:Test> {
+    tester: T,
+    value: T::V,
+}
+
+impl<T:Test> TesterPair<T> {
+    fn new(tester: T, value: T::V) -> TesterPair<T> {
+        TesterPair { tester: tester, value: value }
+    }
+
+    fn test(&self) -> bool {
+        self.tester.test(&self.value)
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////
+
+struct EqU32(u32);
+impl Test for EqU32 {
+    type V = u32;
+
+    fn test(&self, value: &u32) -> bool {
+        self.0 == *value
+    }
+}
+
+struct EqI32(i32);
+impl Test for EqI32 {
+    type V = i32;
+
+    fn test(&self, value: &i32) -> bool {
+        self.0 == *value
+    }
+}
+
+fn main() {
+    let tester = TesterPair::new(EqU32(22), 23);
+    tester.test();
+
+    let tester = TesterPair::new(EqI32(22), 23);
+    tester.test();
+}