From df5f84d49dd3fb3f016933ed8ca4038f67e81be5 Mon Sep 17 00:00:00 2001
From: Takatoshi Kondo <redboltz@gmail.com>
Date: Sun, 30 Aug 2015 13:08:00 +0900
Subject: [PATCH] Added totally ordered.

---
 include/msgpack/adaptor/boost/msgpack_variant.hpp | 6 ++++--
 test/boost_variant.cpp                            | 6 ++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/include/msgpack/adaptor/boost/msgpack_variant.hpp b/include/msgpack/adaptor/boost/msgpack_variant.hpp
index 10b7ca55..65ff7777 100644
--- a/include/msgpack/adaptor/boost/msgpack_variant.hpp
+++ b/include/msgpack/adaptor/boost/msgpack_variant.hpp
@@ -37,6 +37,7 @@
 #include "msgpack/adaptor/map.hpp"
 
 #include <boost/variant.hpp>
+#include <boost/operators.hpp>
 
 namespace msgpack {
 
@@ -70,7 +71,7 @@ typedef boost::variant<
 
 } // namespace detail
 
-struct variant : detail::variant_imp {
+struct variant : detail::variant_imp, private boost::totally_ordered<variant> {
     typedef detail::variant_imp base;
     variant() {}
     template <typename T>
@@ -115,6 +116,7 @@ inline bool operator==(variant const& lhs, variant const& rhs) {
     return static_cast<variant::base const&>(lhs) == static_cast<variant::base const&>(rhs);
 }
 
+
 struct variant_ref;
 
 namespace detail {
@@ -139,7 +141,7 @@ typedef boost::variant<
 
 } // namespace detail
 
-struct variant_ref : detail::variant_ref_imp {
+struct variant_ref : detail::variant_ref_imp, private boost::totally_ordered<variant_ref>  {
     typedef detail::variant_ref_imp base;
     variant_ref() {}
     template <typename T>
diff --git a/test/boost_variant.cpp b/test/boost_variant.cpp
index 50140f3b..d84cff21 100644
--- a/test/boost_variant.cpp
+++ b/test/boost_variant.cpp
@@ -87,6 +87,12 @@ TEST(MSGPACK_BOOST, pack_convert_variant_bool)
     msgpack::type::variant val2 = ret.get().as<msgpack::type::variant>();
     EXPECT_NO_THROW(boost::get<bool>(val2));
     EXPECT_TRUE(val1 == val2);
+    // Tests for totally ordered
+    EXPECT_FALSE(val1 != val2);
+    EXPECT_FALSE(val1 < val2);
+    EXPECT_FALSE(val1 > val2);
+    EXPECT_TRUE(val1 <= val2);
+    EXPECT_TRUE(val1 >= val2);
 }
 
 TEST(MSGPACK_BOOST, object_variant_bool)