From 84f5ff06f0c7dbe10f5ec8452521bd79262bc05b Mon Sep 17 00:00:00 2001
From: Helmut Grohne <helmut@subdivi.de>
Date: Mon, 21 Mar 2022 06:02:47 +0100
Subject: Avoid use of deprecated std::iterator (twice)

Closes: #1008036
---
 apt-pkg/cacheiterators.h | 9 +++++++--
 apt-pkg/cacheset.h       | 6 +++++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/apt-pkg/cacheiterators.h b/apt-pkg/cacheiterators.h
index 466492442..9273369bd 100644
--- a/apt-pkg/cacheiterators.h
+++ b/apt-pkg/cacheiterators.h
@@ -44,8 +44,7 @@
 // abstract Iterator template						/*{{{*/
 /* This template provides the very basic iterator methods we
    need to have for doing some walk-over-the-cache magic */
-template<typename Str, typename Itr> class APT_PUBLIC pkgCache::Iterator :
-			public std::iterator<std::forward_iterator_tag, Str> {
+template<typename Str, typename Itr> class APT_PUBLIC pkgCache::Iterator {
 	/** \brief Returns the Pointer for this struct in the owner
 	 *  The implementation of this method should be pretty short
 	 *  as it will only return the Pointer into the mmap stored
@@ -61,6 +60,12 @@ template<typename Str, typename Itr> class APT_PUBLIC pkgCache::Iterator :
 	pkgCache *Owner;
 
 	public:
+	// iterator_traits
+	using iterator_category = std::forward_iterator_tag;
+	using value_type = Str;
+	using difference_type = std::ptrdiff_t;
+	using pointer = Str*;
+	using reference = Str&;
 	// Iteration
 	inline bool end() const {return Owner == 0 || S == OwnerPointer();}
 
diff --git a/apt-pkg/cacheset.h b/apt-pkg/cacheset.h
index 383d26b76..4ea78bcae 100644
--- a/apt-pkg/cacheset.h
+++ b/apt-pkg/cacheset.h
@@ -203,12 +203,16 @@ private:
 };									/*}}}*/
 // Iterator templates for our Containers				/*{{{*/
 template<typename Interface, typename Master, typename iterator_type, typename container_iterator, typename container_value> class Container_iterator_base :
-   public std::iterator<typename std::iterator_traits<container_iterator>::iterator_category, container_value>,
    public Interface::template iterator_base<iterator_type>
 {
 protected:
 	container_iterator _iter;
 public:
+	using iterator_category = typename std::iterator_traits<container_iterator>::iterator_category;
+	using value_type = container_value;
+	using difference_type = std::ptrdiff_t;
+	using pointer = container_value*;
+	using reference = container_value&;
 	explicit Container_iterator_base(container_iterator const &i) : _iter(i) {}
 	inline container_value operator*(void) const { return static_cast<iterator_type const*>(this)->getType(); };
 	operator container_iterator(void) const { return _iter; }
-- 
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