From e88ec2fc6e97c74f582053e4074fece110e01935 Mon Sep 17 00:00:00 2001
From: Andrey Semashev <andrey.semashev@gmail.com>
Date: Sun, 6 Nov 2016 21:07:08 +0300
Subject: [PATCH] Replaced std::binary_function with the corresponding
 typedefs. Improves compatibility with C++17. Also fixed an include for the
 standard streams.

---
 test/is_sorted_test.cpp | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/test/is_sorted_test.cpp b/test/is_sorted_test.cpp
index b84c5a3..f88d91c 100644
--- a/test/is_sorted_test.cpp
+++ b/test/is_sorted_test.cpp
@@ -5,15 +5,17 @@
     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 ==============================================================================*/
 
-#include <ios>
+#include <iostream>
 #include <boost/config.hpp>
 #include <boost/array.hpp>
 #include <boost/detail/is_sorted.hpp>
 #include <boost/detail/lightweight_test.hpp>
 
 template<class T>
-struct tracking_less: std::binary_function <T, T, bool> {
+struct tracking_less {
   typedef bool result_type;
+  typedef T first_argument_type;
+  typedef T second_argument_type;
 
   #if defined(__PATHSCALE__)
   tracking_less (void) { }
@@ -27,8 +29,10 @@ struct tracking_less: std::binary_function <T, T, bool> {
 };
 
 template<class T>
-struct tracking_less_equal: std::binary_function <T, T, bool> {
+struct tracking_less_equal {
   typedef bool result_type;
+  typedef T first_argument_type;
+  typedef T second_argument_type;
 
   #if defined(__PATHSCALE__)
   tracking_less_equal (void) { }
@@ -42,8 +46,10 @@ struct tracking_less_equal: std::binary_function <T, T, bool> {
 };
 
 template<class T>
-struct tracking_greater: std::binary_function <T, T, bool> {
+struct tracking_greater {
   typedef bool result_type;
+  typedef T first_argument_type;
+  typedef T second_argument_type;
 
   #if defined(__PATHSCALE__)
   tracking_greater (void) { }
@@ -57,8 +63,10 @@ struct tracking_greater: std::binary_function <T, T, bool> {
 };
 
 template<class T>
-struct tracking_greater_equal: std::binary_function <T, T, bool> {
+struct tracking_greater_equal {
   typedef bool result_type;
+  typedef T first_argument_type;
+  typedef T second_argument_type;
 
   #if defined(__PATHSCALE__)
   tracking_greater_equal (void) { }
@@ -127,4 +135,3 @@ int main (void) {
 
   return report_errors();
 }
-