Add new header

include/mapnik/expression_node_types.hpp

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+/*****************************************************************************
+ *
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2011 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_EXPRESSION_NODE_TYPES_HPP
+#define MAPNIK_EXPRESSION_NODE_TYPES_HPP
+
+// mapnik
+//#include <mapnik/value.hpp>
+//#include <mapnik/attribute.hpp>
+
+// boost
+#include <boost/variant.hpp>
+
+namespace mapnik
+{
+
+struct attribute;
+struct geometry_type_attribute;
+namespace value_adl_barrier {
+  class value;
+}
+using value_adl_barrier::value;
+
+namespace tags  {
+struct negate
+{
+    static const char* str()
+    {
+        return "-";
+    }
+};
+
+struct plus
+{
+    static const char* str()
+    {
+        return "+";
+    }
+};
+
+struct minus
+{
+    static const char* str()
+    {
+        return "-";
+    }
+};
+
+struct mult
+{
+    static const char* str()
+    {
+        return "*";
+    }
+};
+
+struct div
+{
+    static const char* str()
+    {
+        return "/";
+    }
+};
+
+
+struct  mod
+{
+    static const char* str()
+    {
+        return "%";
+    }
+};
+
+struct less
+{
+    static const char* str()
+    {
+        return "<";
+    }
+};
+
+struct  less_equal
+{
+    static const char* str()
+    {
+        return "<=";
+    }
+};
+
+struct greater
+{
+    static const char* str()
+    {
+        return ">";
+    }
+};
+
+struct greater_equal
+{
+    static const char* str()
+    {
+        return ">=";
+    }
+};
+
+struct equal_to
+{
+    static const char* str()
+    {
+        return "=";
+    }
+};
+
+struct not_equal_to
+{
+    static const char* str()
+    {
+        return "!=";
+    }
+};
+
+struct logical_not
+{
+    static const char* str()
+    {
+        return "not ";
+    }
+};
+
+struct logical_and
+{
+    static const char* str()
+    {
+        return " and ";
+    }
+};
+
+struct logical_or
+{
+    static const char* str()
+    {
+        return " or ";
+    }
+};
+
+} // end operation tags
+
+
+template <typename Tag> struct binary_node;
+template <typename Tag> struct unary_node;
+struct regex_match_node;
+struct regex_replace_node;
+
+typedef mapnik::value value_type;
+
+typedef boost::variant <
+value_type,
+attribute,
+geometry_type_attribute,
+boost::recursive_wrapper<unary_node<tags::negate> >,
+boost::recursive_wrapper<binary_node<tags::plus> >,
+boost::recursive_wrapper<binary_node<tags::minus> >,
+boost::recursive_wrapper<binary_node<tags::mult> >,
+boost::recursive_wrapper<binary_node<tags::div> >,
+boost::recursive_wrapper<binary_node<tags::mod> >,
+boost::recursive_wrapper<binary_node<tags::less> >,
+boost::recursive_wrapper<binary_node<tags::less_equal> >,
+boost::recursive_wrapper<binary_node<tags::greater> >,
+boost::recursive_wrapper<binary_node<tags::greater_equal> >,
+boost::recursive_wrapper<binary_node<tags::equal_to> >,
+boost::recursive_wrapper<binary_node<tags::not_equal_to> >,
+boost::recursive_wrapper<unary_node<tags::logical_not> >,
+boost::recursive_wrapper<binary_node<tags::logical_and> >,
+boost::recursive_wrapper<binary_node<tags::logical_or> >,
+boost::recursive_wrapper<regex_match_node>,
+boost::recursive_wrapper<regex_replace_node>
+> expr_node;
+
+}
+
+
+#endif //MAPNIK_EXPRESSION_NODE_HPP