From c695be11b56a90e03e469560854d9b3505049d10 Mon Sep 17 00:00:00 2001
From: "Daniel J. Hofmann" <daniel@trvx.org>
Date: Sun, 14 May 2017 16:31:00 +0200
Subject: [PATCH] Adds forwarding make_optional helpers, resolves #30

---
 include/boost/optional/optional.hpp | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/include/boost/optional/optional.hpp b/include/boost/optional/optional.hpp
index a465b9e..e578a39 100644
--- a/include/boost/optional/optional.hpp
+++ b/include/boost/optional/optional.hpp
@@ -1276,6 +1276,25 @@ class optional<T&&>
 
 namespace boost {
 
+#ifndef BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
+
+template<class T>
+inline
+optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type> make_optional ( T && v  )
+{
+  return optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type>(boost::forward<T>(v));
+}
+
+// Returns optional<T>(cond,v)
+template<class T>
+inline
+optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type> make_optional ( bool cond, T && v )
+{
+  return optional<BOOST_DEDUCED_TYPENAME boost::decay<T>::type>(cond,boost::forward<T>(v));
+}
+
+#else
+
 // Returns optional<T>(v)
 template<class T>
 inline
@@ -1292,6 +1311,8 @@ optional<T> make_optional ( bool cond, T const& v )
   return optional<T>(cond,v);
 }
 
+#endif // BOOST_OPTIONAL_DETAIL_NO_RVALUE_REFERENCES
+
 // Returns a reference to the value if this is initialized, otherwise, the behaviour is UNDEFINED.
 // No-throw
 template<class T>