From a3abf04548f5fbfcebe78c3634aba5fac7432f12 Mon Sep 17 00:00:00 2001
From: Andrzej Krzemienski <akrzemi1@gmail.com>
Date: Sun, 1 Oct 2023 12:24:46 +0200
Subject: [PATCH] added deprecation message

---
 include/boost/none_t.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/boost/none_t.hpp b/include/boost/none_t.hpp
index 6b3c833..a949522 100644
--- a/include/boost/none_t.hpp
+++ b/include/boost/none_t.hpp
@@ -14,6 +14,14 @@
 #define BOOST_NONE_T_17SEP2003_HPP
 
 #include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined (BOOST_NO_CXX11_RVALUE_REFERENCES) || defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || defined(BOOST_NO_CXX11_REF_QUALIFIERS)
+|| defined(BOOST_NO_CXX11_LAMBDAS) || defined(BOOST_NO_CXX11_DECLTYPE_N3276) || defined(BOOST_NO_CXX11_NOEXCEPT) || defined(BOOST_NO_CXX11_DELETED_FUNCTIONS) || defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || defined(BOOST_NO_CXX11_DEFAULTED_MOVES) || defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
+
+BOOST_PRAGMA_MESSAGE("C++03 support is deprecated in Boost.Optional 1.83 and will be removed in Boost.Optional 1.86.")
+
+#endif
 
 namespace boost {