From c924b4274949bda0283231d0039dd582d0bcd4b0 Mon Sep 17 00:00:00 2001
From: jakob lovhall <jakob.lovhall@maverickderivatives.com>
Date: Thu, 30 Jun 2022 15:35:25 +0200
Subject: [PATCH] add forward reference assignment operator to
 function_output_iterator

---
 .../boost/iterator/function_output_iterator.hpp    | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/boost/iterator/function_output_iterator.hpp b/include/boost/iterator/function_output_iterator.hpp
index 51fe835..80c29c7 100644
--- a/include/boost/iterator/function_output_iterator.hpp
+++ b/include/boost/iterator/function_output_iterator.hpp
@@ -12,6 +12,11 @@
 #define BOOST_ITERATOR_FUNCTION_OUTPUT_ITERATOR_HPP
 
 #include <iterator>
+#include <boost/config.hpp>
+
+#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
+#include <utility>
+#endif
 
 namespace boost {
 namespace iterators {
@@ -33,10 +38,19 @@ namespace iterators {
 
     struct output_proxy {
       output_proxy(UnaryFunction& f) : m_f(f) { }
+
+#ifdef BOOST_NO_CXX11_RVALUE_REFERENCES
       template <class T> output_proxy& operator=(const T& value) {
         m_f(value);
         return *this;
       }
+#else
+      template <class T> output_proxy& operator=(T&& value) {
+        m_f(std::forward<T>(value));
+        return *this;
+      }
+#endif
+
       UnaryFunction& m_f;
     };
     output_proxy operator*() { return output_proxy(m_f); }