re PR libstdc++/49204 ([C++0x] remaining issues in <future>)

	PR libstdc++/49204
	* include/std/future (future_errc): Implement LWG 2056.

From-SVN: r182658

libstdc++-v3/ChangeLog

 2011-12-23  Jonathan Wakely  <jwakely.gcc@gmail.com>
 
+	PR libstdc++/49204
+	* include/std/future (future_errc): Implement LWG 2056.
+
+2011-12-23  Jonathan Wakely  <jwakely.gcc@gmail.com>
+
 	* include/bits/regex.h (match_results::size_type): Use
 	allocator_traits.
 

libstdc++-v3/include/std/future

@@ -60,10 +60,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
   /// Error code for futures
   enum class future_errc
   {
-    broken_promise,
-    future_already_retrieved,
+    future_already_retrieved = 1,
     promise_already_satisfied,
-    no_state
+    no_state,
+    broken_promise
   };
 
   /// Specialization.