--- /dev/null
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <functional>
+
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+int main() {}
+
+#else
+
+int main()
+{
+ {
+ boost::shared_ptr<int> p1, p2( new int );
+
+ BOOST_TEST_EQ( std::hash< boost::shared_ptr<int> >()( p1 ), std::hash< int* >()( p1.get() ) );
+ BOOST_TEST_EQ( std::hash< boost::shared_ptr<int> >()( p2 ), std::hash< int* >()( p2.get() ) );
+ }
+
+ {
+ boost::shared_ptr<int[]> p1, p2( new int[1] );
+
+ BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+ BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+ }
+
+ {
+ boost::shared_ptr<int[1]> p1, p2( new int[1] );
+
+ BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[1]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+ BOOST_TEST_EQ( std::hash< boost::shared_ptr<int[1]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+ }
+
+ return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)