From 9b7ddf85cc9600d4695c535c7f9f1f56c7b22161 Mon Sep 17 00:00:00 2001
From: Barend Gehrels <barend@xs4all.nl>
Date: Wed, 9 Nov 2016 09:30:53 +0100
Subject: [PATCH] [overlay] avoid warning about same_multi1 which is
 technically redundant because of template parameter values

---
 .../geometry/algorithms/detail/overlay/handle_colocations.hpp  | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/boost/geometry/algorithms/detail/overlay/handle_colocations.hpp b/include/boost/geometry/algorithms/detail/overlay/handle_colocations.hpp
index cee709a86..5f3857dcd 100644
--- a/include/boost/geometry/algorithms/detail/overlay/handle_colocations.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/handle_colocations.hpp
@@ -14,6 +14,7 @@
 #include <map>
 #include <vector>
 
+#include <boost/core/ignore_unused.hpp>
 #include <boost/range.hpp>
 #include <boost/geometry/core/point_order.hpp>
 #include <boost/geometry/algorithms/detail/overlay/cluster_info.hpp>
@@ -396,6 +397,8 @@ inline bool is_ie_turn(segment_identifier const& ext_seg_0,
     bool const same_multi1 = ! Reverse1
                              && ext_seg_1.multi_index == other_seg_1.multi_index;
 
+    boost::ignore_unused(same_multi1);
+
     return same_multi0
             && same_multi1
             && ! is_interior<Reverse0>(ext_seg_0)