From ceae87e4c0aeb98ebe284f35f720832130fc2f6c Mon Sep 17 00:00:00 2001
From: jzmaddock <john@johnmaddock.co.uk>
Date: Fri, 13 Jan 2023 19:23:21 +0000
Subject: [PATCH] Update VS/CLR support. Fixes:
 https://github.com/boostorg/config/issues/467

---
 include/boost/config/compiler/visualc.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/config/compiler/visualc.hpp b/include/boost/config/compiler/visualc.hpp
index 6269c471..ae631219 100644
--- a/include/boost/config/compiler/visualc.hpp
+++ b/include/boost/config/compiler/visualc.hpp
@@ -271,7 +271,7 @@
 #ifndef BOOST_NO_CXX11_THREAD_LOCAL
 #  define BOOST_NO_CXX11_THREAD_LOCAL
 #endif
-#ifndef BOOST_NO_SFINAE_EXPR
+#if !defined(BOOST_NO_SFINAE_EXPR) && !defined(_MSVC_LANG)
 #  define BOOST_NO_SFINAE_EXPR
 #endif
 #ifndef BOOST_NO_CXX11_REF_QUALIFIERS