auto merge of #15440 : pcwalton/rust/struct-aliases, r=brson

Closes #4508.

r? @nick29581

src/test/auxiliary/xcrate_struct_aliases.rs

@@ -0,0 +1,17 @@
+// 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.
+
+pub struct S {
+    pub x: int,
+    pub y: int,
+}
+
+pub type S2 = S;
+

src/test/compile-fail/issue-14541.rs

@@ -13,8 +13,8 @@ struct vec3 { y: f32, z: f32 }
 
 fn make(v: vec2) {
     let vec3 { y: _, z: _ } = v;
-    //~^ ERROR mismatched types: expected `vec2` but found `vec3`
+    //~^ ERROR `vec3` does not name the structure `vec2`
     //~^^ ERROR struct `vec2` does not have a field named `z`
 }
 
-fn main() { }
+fn main() { }

src/test/run-pass/struct-aliases-xcrate.rs

@@ -0,0 +1,31 @@
+// 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.
+
+// aux-build:xcrate_struct_aliases.rs
+extern crate xcrate_struct_aliases;
+
+use xcrate_struct_aliases::{S, S2};
+
+fn main() {
+    let s = S2 {
+        x: 1,
+        y: 2,
+    };
+    match s {
+        S2 {
+            x: x,
+            y: y
+        } => {
+            assert_eq!(x, 1);
+            assert_eq!(y, 2);
+        }
+    }
+}
+

src/test/run-pass/struct-aliases.rs

@@ -0,0 +1,33 @@
+// 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.
+
+struct S {
+    x: int,
+    y: int,
+}
+
+type S2 = S;
+
+fn main() {
+    let s = S2 {
+        x: 1,
+        y: 2,
+    };
+    match s {
+        S2 {
+            x: x,
+            y: y
+        } => {
+            assert_eq!(x, 1);
+            assert_eq!(y, 2);
+        }
+    }
+}
+