From e6096abf57c1b04b78fc069bff053c0a7cbe0a6f Mon Sep 17 00:00:00 2001
From: Mat Sutcliffe <oktal3700@gmail.com>
Date: Mon, 4 Mar 2019 19:36:16 +0000
Subject: [PATCH] Ref T557 Work around bug in GCC 5.

---
 src/blackmisc/metaclass.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/blackmisc/metaclass.h b/src/blackmisc/metaclass.h
index ad3e30241..269486004 100644
--- a/src/blackmisc/metaclass.h
+++ b/src/blackmisc/metaclass.h
@@ -141,7 +141,7 @@ namespace BlackMisc
 
         //! True if m_flags contains all flags.
         template <typename Flags2>
-        constexpr bool has(Flags2 flags) const { return (m_flags & flags) == flags; }
+        constexpr bool has(Flags2 flags) const { return (MetaFlags<Flags>() & flags) == flags; }
 
         //! Invoke the member on an instance of the value class.
         template <typename T, typename... Ts>