From 08e41973f0f0041d77da775e5e899e4a7b3a45b8 Mon Sep 17 00:00:00 2001
From: Ivan Grokhotkov <ivan@espressif.com>
Date: Mon, 15 Aug 2022 23:12:20 +0200
Subject: [PATCH] nvs_flash: update intrusive_list for compatibility with C++17

std::iterator is deprecated since C++17, the code produces a warning
when compiled with clang and libc++.
---
 components/nvs_flash/src/intrusive_list.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/components/nvs_flash/src/intrusive_list.h b/components/nvs_flash/src/intrusive_list.h
index 798b718a66..9a8c6f228e 100644
--- a/components/nvs_flash/src/intrusive_list.h
+++ b/components/nvs_flash/src/intrusive_list.h
@@ -30,9 +30,14 @@ class intrusive_list
 
 public:
 
-    class iterator : public std::iterator<std::forward_iterator_tag, T>
+    class iterator
     {
     public:
+        using iterator_category = std::forward_iterator_tag;
+        using value_type = T;
+        using difference_type = ptrdiff_t;
+        using pointer = T*;
+        using reference = T&;
 
         iterator() : mPos(nullptr) {}