More systematic error reporting in path resolution

src/test/ui/resolve/tuple-struct-alias.rs

@@ -0,0 +1,28 @@
+// Copyright 2016 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(u8, u16);
+type A = S;
+
+impl S {
+    fn f() {
+        let s = Self(0, 1);
+        match s {
+            Self(..) => {}
+        }
+    }
+}
+
+fn main() {
+    let s = A(0, 1);
+    match s {
+        A(..) => {}
+    }
+}