c++11 - C++ Cereal Archive Type Specialization not working -

i'm using cereal 1.1.2 vs 2013.

i've tried example archive specialization types here: http://uscilab.github.io/cereal/archive_specialization.html

but doesn't compile error:

error c2665: 'cereal::make_nvp' : none of 3 overloads convert argument types ... while trying match argument list '(const std::string, const std::string)

i'm trying compile following code, using snippets example:

#include "cereal\types\map.hpp"  namespace cereal {     //! saving std::map<std::string, std::string> text based archives     // note shows off internal cereal traits such enableif,     // allow template instantiated if predicates     // true     template <class archive, class c, class a,         traits::enableif<traits::is_text_archive<archive>::value> = traits::sfinae> inline     void save(archive & ar, std::map<std::string, std::string, c, a> const & map)     {         (const auto & : map)             ar(cereal::make_nvp<archive>(i.first, i.second));     }      //! loading std::map<std::string, std::string> text based archives     template <class archive, class c, class a,         traits::enableif<traits::is_text_archive<archive>::value> = traits::sfinae> inline     void load(archive & ar, std::map<std::string, std::string, c, a> & map)     {         map.clear();          auto hint = map.begin();         while (true)         {             const auto nameptr = ar.getnodename();              if (!nameptr)                 break;              std::string key = nameptr;             std::string value; ar(value);             hint = map.emplace_hint(hint, std::move(key), std::move(value));         }     } } // namespace cereal   #include "cereal\archives\json.hpp" #include <iostream> #include <string> #include <fstream>  int main() {     std::stringstream ss;     {         cereal::jsonoutputarchive ar(ss);         std::map<std::string, std::string> filter = { { "type", "sensor" }, { "status", "critical" } };          ar(cereal_nvp(filter));     }      std::cout << ss.str() << std::endl;      {         cereal::jsoninputarchive ar(ss);         cereal::jsonoutputarchive ar2(std::cout);          std::map<std::string, std::string> filter;          ar(cereal_nvp(filter));         ar2(cereal_nvp(filter));     }      std::cout << std::endl;     return 0; } 

note if remove save() function overload compile. goal able use map key json key, comes out this:

{     "map": {         "a": 1,         "b": 2     },     "map_not_string": [         {             "key": 1,             "value": 1         },         {             "key": 2,             "value": 2         }     ] } 

i brought question issue on cereal's github , got answer: https://github.com/uscilab/cereal/issues/197

the problem templated version of make_nvp, so

ar(cereal::make_nvp<archive>(i.first, i.second));

becomes

ar(cereal::make_nvp(i.first, i.second));

the documentation updated shouldn't problem anymore.