view json11/README.md @ 116:d15cb1151d76

Add JSON support directly to the server. Had hoped to avoid this (using Capnp as canonical in the server and then converting externally as necessary) but it's just too useful for debugging purposes when bundled with client app

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();

More documentation is still to come. For now, see json11.hpp.