define BOOST_SPIRIT_INSTANTIATE_UNUSED once and re-use [skip-ci]

include/mapnik/boost_spirit_instantiate.hpp

@@ -0,0 +1,39 @@
+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2018 Artem Pavlenko
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *****************************************************************************/
+
+#ifndef MAPNIK_BOOST_SPIRIT_INSTANTIATE_HPP
+#define MAPNIK_BOOST_SPIRIT_INSTANTIATE_HPP
+
+namespace boost { namespace spirit { namespace x3
+{
+// helper macro
+#define BOOST_SPIRIT_INSTANTIATE_UNUSED(rule_type, Iterator, Context)   \
+    template bool parse_rule<Iterator, Context, boost::spirit::x3::unused_type const>( \
+        rule_type rule_                                                 \
+        , Iterator& first, Iterator const& last                         \
+        , Context const& context, boost::spirit::x3::unused_type const& ); \
+    /***/
+
+}}}
+
+
+#endif // MAPNIK_BOOST_SPIRIT_INSTANTIATE_HPP

include/mapnik/json/json_grammar_config.hpp

@@ -33,6 +33,7 @@
 #include <boost/bimap/unordered_set_of.hpp>
 #include <boost/assign/list_of.hpp>
 #pragma GCC diagnostic pop
+#include <mapnik/boost_spirit_instantiate.hpp>
 
 namespace mapnik { namespace json {
 
@@ -108,14 +109,6 @@ using feature_context_const_type = x3::context<feature_tag,
                                                            mapnik::transcoder const,
                                                            phrase_parse_context_type>>;
 
-// helper macro
-#define BOOST_SPIRIT_INSTANTIATE_UNUSED(rule_type, Iterator, Context)   \
-    template bool parse_rule<Iterator, Context, boost::spirit::x3::unused_type const>( \
-        rule_type rule_                                                 \
-        , Iterator& first, Iterator const& last                         \
-        , Context const& context, boost::spirit::x3::unused_type const& ); \
-    /***/
-
 }}}
 
 #endif // MAPNIK_JSON_GRAMMAR_CONFIG_HPP

src/svg/svg_path_grammar_x3.cpp

@@ -21,16 +21,10 @@
  *****************************************************************************/
 
 #include <mapnik/svg/svg_path_grammar_x3_def.hpp>
+#include <mapnik/boost_spirit_instantiate.hpp>
 
 namespace mapnik { namespace svg { namespace grammar {
 
-#define BOOST_SPIRIT_INSTANTIATE_UNUSED(rule_type, Iterator, Context)   \
-    template bool parse_rule<Iterator, Context, boost::spirit::x3::unused_type const>( \
-        rule_type rule_                                                 \
-        , Iterator& first, Iterator const& last                         \
-        , Context const& context, boost::spirit::x3::unused_type const& ); \
-    /***/
-
 BOOST_SPIRIT_INSTANTIATE_UNUSED(svg_path_grammar_type, iterator_type, svg_parse_context_type);
 BOOST_SPIRIT_INSTANTIATE_UNUSED(svg_points_grammar_type, iterator_type, svg_parse_context_type);