From 7a695d8a82eaaa7db0cf4484b22fc3db3d43ac49 Mon Sep 17 00:00:00 2001
From: Eugene Kosov <eugene.kosov@mariadb.com>
Date: Fri, 5 Jun 2020 23:33:24 +0300
Subject: fix compilation with VS2019, preview of 16.7 version

Compiler tells something about argument-dependent lookup. I do not
understand how that ADL works. But I know that such operators should
be free functions, instead of methods:
http://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Ro-symmetric

Such syntax defines 'friend' free functions.
---
 include/ilist.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'include')

diff --git a/include/ilist.h b/include/ilist.h
index 5d0a425a9cc..722677f9057 100644
--- a/include/ilist.h
+++ b/include/ilist.h
@@ -99,8 +99,14 @@ public:
     reference operator*() { return *static_cast<pointer>(node_); }
     pointer operator->() { return static_cast<pointer>(node_); }
 
-    bool operator==(const Iterator &rhs) { return node_ == rhs.node_; }
-    bool operator!=(const Iterator &rhs) { return !(*this == rhs); }
+    friend bool operator==(const Iterator &lhs, const Iterator &rhs)
+    {
+      return lhs.node_ == rhs.node_;
+    }
+    friend bool operator!=(const Iterator &lhs, const Iterator &rhs)
+    {
+      return !(lhs == rhs);
+    }
 
   private:
     ListNode *node_;
-- 
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