From 2a0cbb9f820d91f9d768cf43fcc0414eb62d06f3 Mon Sep 17 00:00:00 2001
From: Grigory Shabaganov <chemodansama@gmail.com>
Date: Sun, 29 Oct 2023 11:14:50 +1000
Subject: [PATCH] Remove std::iterator inheritance as the class is deprecated
 in C++17 and add required typedefs directly.

---
 entityx/Entity.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/entityx/Entity.h b/entityx/Entity.h
index 7c69e0a..966410d 100644
--- a/entityx/Entity.h
+++ b/entityx/Entity.h
@@ -367,8 +367,14 @@ class EntityManager : entityx::help::NonCopyable {
   /// An iterator over a view of the entities in an EntityManager.
   /// If All is true it will iterate over all valid entities and will ignore the entity mask.
   template <class Delegate, bool All = false>
-  class ViewIterator : public std::iterator<std::input_iterator_tag, Entity::Id> {
+  class ViewIterator {
    public:
+    typedef Entity::Id value_type;
+    typedef ptrdiff_t difference_type;
+    typedef Entity::Id* pointer;
+    typedef Entity::Id& reference;
+    typedef std::input_iterator_tag iterator_category;
+
     Delegate &operator ++() {
       ++i_;
       next();