view ext/json11/README.md @ 180:bd543e74a9bf

Correct the inspection of the JSON object in successful to look for both error and success objects, writing out an error string if neither are present. Revert error handling in readInput() for JSON.

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.