From 01a8d9ab5431e6632eef539fa9849e83942d855a Mon Sep 17 00:00:00 2001
From: k-hara <k.hara.pg@gmail.com>
Date: Sat, 24 Mar 2012 12:51:57 +0900
Subject: [PATCH] Add static assert

---
 std/typecons.d | 1 +
 1 file changed, 1 insertion(+)

diff --git a/std/typecons.d b/std/typecons.d
index 36ddd247d..59578e217 100644
--- a/std/typecons.d
+++ b/std/typecons.d
@@ -2772,6 +2772,7 @@ mixin template Proxy(alias a)
 {
     auto ref opEquals(this X)(auto ref typeof(this) b)
     {
+        static assert(a.stringof.startsWith("this."));
         return a == mixin("b."~a.stringof[5..$]);   // remove "this."
     }
     auto ref opEquals(this X, B)(auto ref B b) if (!is(B == typeof(this)))