From 89bd8de30a5e1d7beb451a3b3190ae861ead380b Mon Sep 17 00:00:00 2001
From: XRay3D <xray3d@ya.ru>
Date: Sun, 5 Apr 2026 01:04:16 +0300
Subject: [PATCH] Update clipper.core.h Add three way comparison.

Needed to satisfy C++ 26 standard library concepts.
---
 CPP/Clipper2Lib/include/clipper2/clipper.core.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CPP/Clipper2Lib/include/clipper2/clipper.core.h b/CPP/Clipper2Lib/include/clipper2/clipper.core.h
index 99a52054..3508500b 100644
--- a/CPP/Clipper2Lib/include/clipper2/clipper.core.h
+++ b/CPP/Clipper2Lib/include/clipper2/clipper.core.h
@@ -237,6 +237,10 @@ namespace Clipper2Lib
 
     inline void Negate() { x = -x; y = -y; }
 
+#if __cpp_impl_three_way_comparison >= 201907L
+    constexpr auto operator<=>(const Point&) const = default;
+#endif
+
   };
 
   //nb: using 'using' here (instead of typedef) as they can be used in templates
@@ -400,6 +404,9 @@ namespace Clipper2Lib
       os << "(" << rect.left << "," << rect.top << "," << rect.right << "," << rect.bottom << ") ";
       return os;
     }
+#if __cpp_impl_three_way_comparison >= 201907L
+    constexpr auto operator<=>(const Rect&) const = default;
+#endif
   };
 
   template <typename T1, typename T2>