From c3e4148ee22c85c73102f627e42bd4031102a8a2 Mon Sep 17 00:00:00 2001
From: Krystian Stasiowski <sdkrystian@gmail.com>
Date: Fri, 28 Feb 2020 16:03:23 -0500
Subject: [PATCH] Fix msvc warning

---
 test/constexpr_tests.hpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/constexpr_tests.hpp b/test/constexpr_tests.hpp
index 54c33cf..ec83111 100644
--- a/test/constexpr_tests.hpp
+++ b/test/constexpr_tests.hpp
@@ -566,11 +566,11 @@ testConstantEvaluation()
   return true;
 #elif defined(BOOST_STATIC_STRING_CPP11)
   // c++11 constexpr tests
-  return cstatic_string().size() + 
-    cstatic_string().empty() + 
+  return bool(cstatic_string().size() + 
     cstatic_string().length() + 
     cstatic_string().max_size() + 
-    cstatic_string().capacity();
+    cstatic_string().capacity()) &&
+    cstatic_string().empty());
 #endif
 }
 } // static_strings