CJStruct

UNSTABLE

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CJStruct is a header-only C++20 library for JSON <-> struct mapping, powered by Boost.PFR’s aggregate reflection. Just call JsonToStruct or StructToJson- no manual serializers needed.

_{^{This is my first C++ test project, please keep this in mind before writing angry issues :)}}

Features

• Automatic (de)serialization of:
  • Built-in types (int, double, bool, std::string, etc.)
  • STL containers: std::vector, std::list, std::set, std::map, std::array
  • Tuples/pairs: std::tuple, std::pair
  • Nested aggregate structs
• Single header (CJStruct.h), no macros
• C++20 (or newer) support

Requirements

• A C++20-compliant compiler (G++/Clang/MSVC)
• Boost.PFR (part of Boost ≥1.68)

Quick Start

1. Add directory CJStruct to your include path.
2. Include and use:

#include <fstream>
#include <string>
#include <boost/pfr.hpp>  
#include <CJStruct/CJStruct.h>

struct Inner { int a; bool b; };
struct MyData {
    std::vector<int> v;
    std::map<std::string,double> m;
    std::string name;
    Inner nested;
};

int main() {
    // 1) Read JSON file into a string
    std::ifstream ifs("data.json");
    std::string json((std::istreambuf_iterator<char>(ifs)),
                     std::istreambuf_iterator<char>());

    // 2) Parse JSON → struct
    MyData data{};
    JsonParser::JsonToStruct<MyData>(json, data);

    // ... modify data ...

    // 3) Serialize struct → JSON
    std::string out;
    JsonParser::StructToJson<MyData>(out, data);

    // 4) Write JSON out
    std::ofstream ofs("out.json");
    ofs << out;
}

License

This project is released under the MIT License.