From faab25232f54fb59a323de4b919ecb9b594bbff6 Mon Sep 17 00:00:00 2001
From: Menelaos Karavelas <menelaos.karavelas@gmail.com>
Date: Thu, 19 Jun 2014 17:07:37 +0300
Subject: [PATCH] [algorithms][detail] make sure we are not going to get an
 unused variable warning (on MSVC)

---
 .../geometry/algorithms/detail/check_iterator_range.hpp     | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/boost/geometry/algorithms/detail/check_iterator_range.hpp b/include/boost/geometry/algorithms/detail/check_iterator_range.hpp
index 19f1b3f45..04355b7f5 100644
--- a/include/boost/geometry/algorithms/detail/check_iterator_range.hpp
+++ b/include/boost/geometry/algorithms/detail/check_iterator_range.hpp
@@ -10,6 +10,8 @@
 #ifndef BOOST_GEOMETRY_ALGORITHMS_DETAIL_CHECK_ITERATOR_RANGE_HPP
 #define BOOST_GEOMETRY_ALGORITHMS_DETAIL_CHECK_ITERATOR_RANGE_HPP
 
+#include <boost/core/ignore_unused.hpp>
+
 
 namespace boost { namespace geometry
 {
@@ -46,6 +48,10 @@ struct check_iterator_range
                              InputIterator beyond,
                              Predicate const& predicate)
     {
+        // in case predicate's apply method is static, MSVC will
+        // complain that predicate is not used
+        boost::ignore_unused(predicate);
+
         for (InputIterator it = first; it != beyond; ++it)
         {
             if ( !predicate.apply(*it) )