From c326d30f2875a21da60b476e331f39b779755abd Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Sun, 6 Nov 2016 14:43:42 +0200
Subject: [PATCH] Remove std::unary/binary_function use, they have been removed
 in C++17

---
 include/boost/function/function_template.hpp | 11 ------
 test/Jamfile.v2                              |  2 +
 test/result_arg_types_test.cpp               | 40 ++++++++++++++++++++
 3 files changed, 42 insertions(+), 11 deletions(-)
 create mode 100644 test/result_arg_types_test.cpp

diff --git a/include/boost/function/function_template.hpp b/include/boost/function/function_template.hpp
index 82c81d7..7984c83 100644
--- a/include/boost/function/function_template.hpp
+++ b/include/boost/function/function_template.hpp
@@ -656,17 +656,6 @@ namespace boost {
     BOOST_FUNCTION_TEMPLATE_PARMS
   >
   class BOOST_FUNCTION_FUNCTION : public function_base
-
-#if BOOST_FUNCTION_NUM_ARGS == 1
-
-    , public std::unary_function<T0,R>
-
-#elif BOOST_FUNCTION_NUM_ARGS == 2
-
-    , public std::binary_function<T0,T1,R>
-
-#endif
-
   {
   public:
 #ifndef BOOST_NO_VOID_RETURNS
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index f3f13c5..6f3cd0b 100644
--- a/test/Jamfile.v2
+++ b/test/Jamfile.v2
@@ -66,6 +66,8 @@ import testing ;
   [ run libs/function/test/rvalues_test.cpp :  :  :  :  ]
 
   [ compile libs/function/test/function_typeof_test.cpp ]
+
+  [ run libs/function/test/result_arg_types_test.cpp ]
  ;
 }
       
diff --git a/test/result_arg_types_test.cpp b/test/result_arg_types_test.cpp
new file mode 100644
index 0000000..33ccddc
--- /dev/null
+++ b/test/result_arg_types_test.cpp
@@ -0,0 +1,40 @@
+// Boost.Function library
+
+//  Copyright 2016 Peter Dimov
+
+//  Use, modification and distribution is subject to
+//  the Boost Software License, Version 1.0.
+//  (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/function.hpp>
+#include <boost/core/is_same.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+
+struct X
+{
+};
+
+struct Y
+{
+};
+
+struct Z
+{
+};
+
+int main()
+{
+    typedef boost::function<X(Y)> F1;
+
+    BOOST_TEST_TRAIT_TRUE(( boost::core::is_same<F1::result_type, X> ));
+    BOOST_TEST_TRAIT_TRUE(( boost::core::is_same<F1::argument_type, Y> ));
+
+    typedef boost::function<X(Y, Z)> F2;
+
+    BOOST_TEST_TRAIT_TRUE(( boost::core::is_same<F2::result_type, X> ));
+    BOOST_TEST_TRAIT_TRUE(( boost::core::is_same<F2::first_argument_type, Y> ));
+    BOOST_TEST_TRAIT_TRUE(( boost::core::is_same<F2::second_argument_type, Z> ));
+
+    return boost::report_errors();
+}