From 2b8d417b2e3de0b7c5dee72933e0289b1c8976cc Mon Sep 17 00:00:00 2001
From: Laurent Rineau <laurent.rineau@cgal.org>
Date: Wed, 15 May 2019 11:04:37 +0200
Subject: [PATCH] Fix mpz_class... with g++

In my understanding, the reason is that the full specialization
`Modular_traits<mpz_class>` uses `CGAL::mod`, that its uses
`Coercion_traits<A,B>::Type`. That is why the `Coercion_traits`
specialization for `__gmp_expr` must be known before.
---
 Number_types/include/CGAL/mpz_class.h | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Number_types/include/CGAL/mpz_class.h b/Number_types/include/CGAL/mpz_class.h
index 24ceedd4fb7..dc229c02f50 100644
--- a/Number_types/include/CGAL/mpz_class.h
+++ b/Number_types/include/CGAL/mpz_class.h
@@ -313,6 +313,8 @@ public:
 
 } //namespace CGAL
 
+#include <CGAL/gmpxx.h>
+#include <CGAL/gmpxx_coercion_traits.h>
 #include <CGAL/Residue.h>
 #include <CGAL/Modular_traits.h>
 
@@ -362,7 +364,4 @@ struct Split_double<mpz_class>
 
 #undef CGAL_CHECK_GMP_EXPR
 
-#include <CGAL/gmpxx.h>
-#include <CGAL/gmpxx_coercion_traits.h>
-
 #endif // CGAL_MPZ_CLASS_H