From e59271fdc23a0d932feab7f1a71b66b3c3f346eb Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Mon, 2 Dec 2019 02:15:55 +0200
Subject: [PATCH] Check BOOST_MSVC in addition to __cplusplus, because msvc
 doesn't define __cplusplus correctly

---
 include/boost/core/swap.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/core/swap.hpp b/include/boost/core/swap.hpp
index c749ce1..73a454c 100644
--- a/include/boost/core/swap.hpp
+++ b/include/boost/core/swap.hpp
@@ -23,7 +23,7 @@
 
 #include <boost/core/enable_if.hpp>
 #include <boost/config.hpp>
-#if __cplusplus >= 201103L
+#if __cplusplus >= 201103L || defined(BOOST_MSVC)
 #include <utility> //for std::swap (C++11)
 #else
 #include <algorithm> //for std::swap (C++98)