Why does Boost property tree write_json save everything as string? Is it possible to change that?

boost, boost-propertytree, json

Solution

I ended up adding another function to my utils to solve this:

#include <string>
#include <regex>
#include <boost/property_tree/json_parser.hpp>

namespace bpt = boost::property_tree;
typedef bpt::ptree JSON;
namespace boost { namespace property_tree {
    inline void write_jsonEx(const std::string & path, const JSON & ptree)
    {
        std::ostringstream oss;
        bpt::write_json(oss, ptree);
        std::regex reg("\\\"([0-9]+\\.{0,1}[0-9]*)\\\"");
        std::string result = std::regex_replace(oss.str(), reg, "$1");

        std::ofstream file;
        file.open(path);
        file << result;
        file.close();
    }
} }

Hope that helps.

Problem

I'm trying to serialize using boost property tree write_json, it saves everything as strings, it's not that data are wrong, but I need to cast them explicitly every time and I want to use them somewhere else. (like in python or other C++ json (non boost) library) here is some sample code and what I get depending on locale: ``` boost::property_tree::ptree root, arr, elem1, elem2; elem1.put<int>("key0", 0); elem1.put<bool>("key1", true); elem2.put<float>("key2", 2.2f); elem2.put<double>("key3", 3.3); arr.push_back( std::make_pair("", elem1) ); arr.push_back( std::make_pair("", elem2) ); root.put_child("path1.path2", arr); std::stringstream ss; write_json(ss, root); std::string my_string_to_send_somewhare_else = ss.str(); ``` and `my_string_to_send_somewhere_else` is sth. like this: ``` { "path1" : { "path2" : [ { "key0" : "0", "key1" : "true" }, { "key2" : "2.2", "key3" : "3.3" } ] } } ``` Is there anyway to save them as the values, like: `"key1" : true` or `"key2" : 2.2`?

Original source

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