Function definite_path

include/jsoncons_ext/jsonpatch/jsonpatch.hpp:88–123

    template <typename Json>
    jsonpointer::basic_json_pointer<typename Json::char_type> definite_path(const Json& root, jsonpointer::basic_json_pointer<typename Json::char_type>& location)
    {
        using char_type = typename Json::char_type;
        using string_type = std::basic_string<char_type>;

        auto rit = location.rbegin();
        if (rit == location.rend())
        {
            return location;
        }

        if (*rit != jsonpatch_names<char_type>::dash_name())
        {
            return location;
        }

        std::vector<string_type> tokens;
        for (auto it = location.begin(); it != location.rbegin().base()-1; ++it)
        {
            tokens.push_back(*it);
        }
        jsonpointer::basic_json_pointer<char_type> pointer(tokens);

        std::error_code ec;

        Json val = jsonpointer::get(root, pointer, ec);
        if (ec || !val.is_array())
        {
            return location;
        }
        string_type last_token;
        jsoncons::from_integer(val.size(), last_token);
        tokens.emplace_back(std::move(last_token));

        return jsonpointer::basic_json_pointer<char_type>(std::move(tokens));
    }

    enum class op_type {add,remove,replace};
    enum class state_type {begin,abort,commit};