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allow mapnik::value_holder to store nulls, mainly to make it possible to return PyNone in python bindings

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This commit is contained in:
Dane Springmeyer 2011-12-02 17:01:38 -08:00
parent f108349f56
commit 744eca6555
1 changed files with 5 additions and 2 deletions
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7
include/mapnik/params.hpp
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@ -23,19 +23,22 @@
#ifndef MAPNIK_PARAMS_HPP
#define MAPNIK_PARAMS_HPP
// mapnik
// boost
#include <boost/variant.hpp>
#include <boost/optional.hpp>
#include <boost/none.hpp>
#include <boost/lexical_cast.hpp>
// mapnik
#include <mapnik/value.hpp>
// stl
#include <string>
#include <map>
namespace mapnik
{
typedef boost::variant<int,double,std::string> value_holder;
typedef boost::variant<value_null,int,double,std::string> value_holder;
typedef std::pair<const std::string, value_holder> parameter;
typedef std::map<const std::string, value_holder> param_map;