From f734d9d762ea6be941ed98b1c3c13f8df2a97caf Mon Sep 17 00:00:00 2001
From: Andreas Fabri <andreas.fabri@geometryfactory.com>
Date: Thu, 16 Mar 2023 10:52:36 +0100
Subject: [PATCH] Number_types: Fix VC2017 bug with boost::mp

---
 .../CGAL/Sqrt_extension/Sqrt_extension_type.h       | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Number_types/include/CGAL/Sqrt_extension/Sqrt_extension_type.h b/Number_types/include/CGAL/Sqrt_extension/Sqrt_extension_type.h
index 98effda949e..8fd750f89d9 100644
--- a/Number_types/include/CGAL/Sqrt_extension/Sqrt_extension_type.h
+++ b/Number_types/include/CGAL/Sqrt_extension/Sqrt_extension_type.h
@@ -662,10 +662,12 @@ CGAL::Comparison_result
   // NT
   friend bool operator == (const Sqrt_extension& p, const NT& num)
     { return (p-num).is_zero();}
+#if 0
   friend bool operator <  (const Sqrt_extension& p, const NT& num)
     { return ( p.compare(num) == CGAL::SMALLER ); }
   friend bool operator >  (const Sqrt_extension& p, const NT& num)
     { return ( p.compare(num) == CGAL::LARGER ); }
+#endif
 
   //CGAL_int(NT)
   friend bool operator == (const Sqrt_extension& p, CGAL_int(NT) num)
@@ -676,6 +678,17 @@ CGAL::Comparison_result
     { return ( p.compare(num) == CGAL::LARGER ); }
 };
 
+template <class NT, class ROOT_, class ACDE_TAG_, class FP_TAG >
+inline bool operator <  (const Sqrt_extension<NT, ROOT_, ACDE_TAG_, FP_TAG>& p, const NT& num)
+{
+    return (p.compare(num) == CGAL::SMALLER);
+}
+
+template <class NT, class ROOT_, class ACDE_TAG_, class FP_TAG >
+inline bool operator >  (const Sqrt_extension<NT, ROOT_, ACDE_TAG_, FP_TAG>& p, const NT& num)
+{
+    return (p.compare(num) == CGAL::LARGER);
+}
 /*!
  * Compute the square of a one-root number.
  */