From 65bbbbc359b2e1c57f589d020b8e9615a9a05843 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Sun, 5 Mar 2023 20:00:18 +0200
Subject: [PATCH] Add C++03 deprecation notice

---
 include/boost/function/detail/prologue.hpp    |  1 +
 .../boost/function/detail/requires_cxx11.hpp  | 22 +++++++++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 include/boost/function/detail/requires_cxx11.hpp

diff --git a/include/boost/function/detail/prologue.hpp b/include/boost/function/detail/prologue.hpp
index 53d0f05..2edebe0 100644
--- a/include/boost/function/detail/prologue.hpp
+++ b/include/boost/function/detail/prologue.hpp
@@ -9,6 +9,7 @@
 
 #ifndef BOOST_FUNCTION_PROLOGUE_HPP
 #define BOOST_FUNCTION_PROLOGUE_HPP
+#  include <boost/function/detail/requires_cxx11.hpp>
 #  include <cassert>
 #  include <algorithm>
 #  include <boost/config/no_tr1/functional.hpp> // unary_function, binary_function
diff --git a/include/boost/function/detail/requires_cxx11.hpp b/include/boost/function/detail/requires_cxx11.hpp
new file mode 100644
index 0000000..a68da21
--- /dev/null
+++ b/include/boost/function/detail/requires_cxx11.hpp
@@ -0,0 +1,22 @@
+#ifndef BOOST_FUNCTION_DETAIL_REQUIRES_CXX11_HPP_INCLUDED
+#define BOOST_FUNCTION_DETAIL_REQUIRES_CXX11_HPP_INCLUDED
+
+// Copyright 2023 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) || \
+    defined(BOOST_NO_CXX11_RVALUE_REFERENCES) || \
+    defined(BOOST_NO_CXX11_DECLTYPE) || \
+    defined(BOOST_NO_CXX11_CONSTEXPR) || \
+    defined(BOOST_NO_CXX11_NOEXCEPT) || \
+    defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+BOOST_PRAGMA_MESSAGE("C++03 support is deprecated in Boost.Function 1.82 and will be removed in Boost.Function 1.84.")
+
+#endif
+
+#endif // #ifndef BOOST_FUNCTION_DETAIL_REQUIRES_CXX11_HPP_INCLUDED