From cae9001400231aafd0f4c6fd873943700e869bba Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Tue, 24 Mar 2015 19:04:08 +0000
Subject: [PATCH] Make constexpr return values const to suppress clang
 warnings.

---
 include/boost/type_traits/integral_constant.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/type_traits/integral_constant.hpp b/include/boost/type_traits/integral_constant.hpp
index 235c2e8..3440dc5 100644
--- a/include/boost/type_traits/integral_constant.hpp
+++ b/include/boost/type_traits/integral_constant.hpp
@@ -67,7 +67,7 @@ namespace boost{
          static const char data[sizeof(long)] = { 0 };
          return dereference(reinterpret_cast<const mpl::integral_c<T, val>*>(&data));
       }
-      BOOST_CONSTEXPR operator T() { return val; }
+      BOOST_CONSTEXPR operator T const() { return val; }
    };
 
    template <class T, T val>
@@ -91,7 +91,7 @@ namespace boost{
          static const char data = 0;
          return dereference(reinterpret_cast<const mpl::bool_<val>*>(&data));
       }
-      BOOST_CONSTEXPR operator bool() { return val; }
+      BOOST_CONSTEXPR operator bool const() { return val; }
    };
 
    template <bool val>