From c9da5cbd8e563a6b06b3d72d9a883281d1531962 Mon Sep 17 00:00:00 2001
From: Artem Pavlenko <artem@mapnik.org>
Date: Mon, 21 Oct 2019 18:21:51 +0100
Subject: [PATCH] support for boost < 1.69

---
 include/mapnik/json/feature_generator_grammar.hpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/mapnik/json/feature_generator_grammar.hpp b/include/mapnik/json/feature_generator_grammar.hpp
index 6fb06cc9d..7bfbbc5e2 100644
--- a/include/mapnik/json/feature_generator_grammar.hpp
+++ b/include/mapnik/json/feature_generator_grammar.hpp
@@ -63,6 +63,7 @@ struct end_container<mapnik::feature_impl const>
     }
 };
 
+#if BOOST_VERSION >= 106900
 template <>
 struct transform_attribute<const mapnik::feature_impl, const mapnik::feature_impl &, boost::spirit::karma::domain, void>
     : detail::transform_attribute_base<mapnik::feature_impl const, mapnik::feature_impl const&,  boost::spirit::karma::domain>
@@ -73,7 +74,7 @@ struct transform_attribute<const boost::fusion::cons<const mapnik::feature_impl
       boost::spirit::karma::domain, void>
     : detail::transform_attribute_base<const boost::fusion::cons<const mapnik::feature_impl &, boost::fusion::nil_>, mapnik::feature_impl const&,  boost::spirit::karma::domain>
 {};
-
+#endif
 }}}
 
 namespace mapnik { namespace json {