From a8e2fb83f30a73bec3e6df63f3ca46ea8fdf5dbe Mon Sep 17 00:00:00 2001
From: Dennis Boerm <allspark@wormhole.eu>
Date: Mon, 18 May 2015 22:17:01 +0200
Subject: [PATCH] fix constexps struct with user defined constructor

---
 include/flags/flags.hpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/flags/flags.hpp b/include/flags/flags.hpp
index 207be0bc3..be69af22d 100644
--- a/include/flags/flags.hpp
+++ b/include/flags/flags.hpp
@@ -14,7 +14,9 @@
 namespace flags {
 
 
-constexpr struct empty_t{} empty;
+constexpr struct empty_t {
+    constexpr empty_t() noexcept {}
+} empty;
 
 
 template <class E> struct flags {