From 0d6f09c1d80bff04749f9a94ec2d5150a377604c Mon Sep 17 00:00:00 2001
From: Dennis Luxen <ich@dennisluxen.de>
Date: Thu, 7 May 2026 09:59:13 +0200
Subject: [PATCH 1/2] fix: implement comparison operator for vector view

The iterator was missing ordering operators. C++20 ranges concepts checks require these for random access iterator. Fixes compilation of #7444.
---
 include/util/vector_view.hpp | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/include/util/vector_view.hpp b/include/util/vector_view.hpp
index 88ee79757d0..412234cb359 100644
--- a/include/util/vector_view.hpp
+++ b/include/util/vector_view.hpp
@@ -12,6 +12,7 @@
 #include <cstddef>
 
 #include <algorithm>
+#include <compare>
 #include <iterator>
 #include <type_traits>
 #include <utility>
@@ -94,14 +95,8 @@ template <typename DataT> class VectorViewIterator
         return it;
     }
 
-    friend bool operator==(const VectorViewIterator &a, const VectorViewIterator &b)
-    {
-        return a.m_value == b.m_value;
-    }
-    friend bool operator!=(const VectorViewIterator &a, const VectorViewIterator &b)
-    {
-        return !(a == b);
-    }
+    friend bool operator==(const VectorViewIterator &a, const VectorViewIterator &b) = default;
+    friend bool operator<=>(const VectorViewIterator &a, const VectorViewIterator &b) = default;
 
   private:
     DataT *m_value;

From 497e6c7fb0ea2314e9924beb14d1a32c466c7a9c Mon Sep 17 00:00:00 2001
From: Dennis Luxen <dennis@project-osrm.org>
Date: Thu, 7 May 2026 10:05:36 +0200
Subject: [PATCH 2/2] fix: spaceship operator return type

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
---
 include/util/vector_view.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/util/vector_view.hpp b/include/util/vector_view.hpp
index 412234cb359..ff93e778e58 100644
--- a/include/util/vector_view.hpp
+++ b/include/util/vector_view.hpp
@@ -96,7 +96,7 @@ template <typename DataT> class VectorViewIterator
     }
 
     friend bool operator==(const VectorViewIterator &a, const VectorViewIterator &b) = default;
-    friend bool operator<=>(const VectorViewIterator &a, const VectorViewIterator &b) = default;
+    friend auto operator<=>(const VectorViewIterator &a, const VectorViewIterator &b) = default;
 
   private:
     DataT *m_value;