/usr/include/mapnik/json/feature_grammar.hpp is in libmapnik-dev 2.2.0+ds1-6build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2012 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_FEATURE_GRAMMAR_HPP
#define MAPNIK_FEATURE_GRAMMAR_HPP
// mapnik
#include <mapnik/json/geometry_grammar.hpp>
#include <mapnik/value.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/unicode.hpp>
#include <mapnik/value.hpp>
// spirit::qi
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/apply_visitor.hpp>
#include <boost/spirit/include/qi.hpp>
#include <boost/spirit/include/phoenix.hpp>
#include <boost/variant/variant_fwd.hpp>
namespace mapnik { namespace json {
namespace qi = boost::spirit::qi;
namespace phoenix = boost::phoenix;
namespace fusion = boost::fusion;
namespace standard_wide = boost::spirit::standard_wide;
using standard_wide::space_type;
class attribute_value_visitor
: public boost::static_visitor<mapnik::value>
{
public:
attribute_value_visitor(mapnik::transcoder const& tr)
: tr_(tr) {}
mapnik::value operator()(std::string const& val) const
{
return mapnik::value(tr_.transcode(val.c_str()));
}
template <typename T>
mapnik::value operator()(T const& val) const
{
return mapnik::value(val);
}
mapnik::transcoder const& tr_;
};
struct put_property
{
template <typename T0,typename T1, typename T2>
struct result
{
typedef void type;
};
explicit put_property(mapnik::transcoder const& tr)
: tr_(tr) {}
template <typename T0,typename T1, typename T2>
void operator() (T0 & feature, T1 const& key, T2 const& val) const
{
mapnik::value v = boost::apply_visitor(attribute_value_visitor(tr_),val); // TODO: optimize
feature.put_new(key, v);
}
mapnik::transcoder const& tr_;
};
struct extract_geometry
{
template <typename T>
struct result
{
typedef boost::ptr_vector<mapnik::geometry_type>& type;
};
template <typename T>
boost::ptr_vector<mapnik::geometry_type>& operator() (T & feature) const
{
return feature.paths();
}
};
template <typename Iterator, typename FeatureType>
struct feature_grammar :
qi::grammar<Iterator, void(FeatureType&),
space_type>
{
feature_grammar(mapnik::transcoder const& tr);
// start
// generic JSON
qi::rule<Iterator,space_type> value;
qi::symbols<char const, char const> unesc_char;
qi::uint_parser< unsigned, 16, 4, 4 > hex4 ;
qi::int_parser<mapnik::value_integer,10,1,-1> int__;
qi::rule<Iterator,std::string(), space_type> string_;
qi::rule<Iterator,space_type> key_value;
qi::rule<Iterator,boost::variant<value_null,bool,
value_integer,value_double>(),space_type> number;
qi::rule<Iterator,space_type> object;
qi::rule<Iterator,space_type> array;
qi::rule<Iterator,space_type> pairs;
qi::real_parser<double, qi::strict_real_policies<double> > strict_double;
// geoJSON
qi::rule<Iterator,void(FeatureType&),space_type> feature; // START
qi::rule<Iterator,space_type> feature_type;
qi::rule<Iterator,void(FeatureType &),space_type> properties;
qi::rule<Iterator,qi::locals<std::string>, void(FeatureType &),space_type> attributes;
qi::rule<Iterator,boost::variant<value_null,bool,value_integer,value_double,std::string>(), space_type> attribute_value;
phoenix::function<put_property> put_property_;
phoenix::function<extract_geometry> extract_geometry_;
boost::phoenix::function<where_message> where_message_;
geometry_grammar<Iterator> geometry_grammar_;
};
}}
#endif // MAPNIK_FEATURE_GRAMMAR_HPP
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