json11

json11 is a tiny JSON library for C++11, providing JSON parsing and serialization.

The core object provided by the library is json11::Json. A Json object represents any JSON value: null, bool, number (int or double), string (std::string), array (std::vector), or object (std::map).

Json objects act like values. They can be assigned, copied, moved, compared for equality or order, and so on. There are also helper methods Json::dump, to serialize a Json to a string, and Json::parse (static) to parse a std::string as a Json object.

It's easy to make a JSON object with C++11's new initializer syntax:

Json my_json = Json::object {
    { "key1", "value1" },
    { "key2", false },
    { "key3", Json::array { 1, 2, 3 } },
};
std::string json_str = my_json.dump();

There are also implicit constructors that allow standard and user-defined types to be automatically converted to JSON. For example:

class Point {
public:
    int x;
    int y;
    Point (int x, int y) : x(x), y(y) {}
    Json to_json() const { return Json::array { x, y }; }
};

std::vector<Point> points = { { 1, 2 }, { 10, 20 }, { 100, 200 } };
std::string points_json = Json(points).dump();

JSON values can have their values queried and inspected:

Json json = Json::array { Json::object { { "k", "v" } } };
std::string str = json[0]["k"].string_value();

For more documentation see json11.hpp.

Maintenance note: This repo is stable but no longer actively maintained. No further development is planned, and no new feature PRs will be merged. Bug fixes may be merged on a volunteer basis. If you have questions or want to talk to other users of Djinni, you can join the Slack community via the link at the end of this document.

License

artwyman/json11

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