Function resolve

include/jsoncons_ext/jsonpointer/jsonpointer.hpp:461–499

    template <typename Json>
    const Json* resolve(const Json* current, const typename Json::string_view_type& buffer, std::error_code& ec)
    {
        if (current->is_array())
        {
            if (buffer.size() == 1 && buffer[0] == '-')
            {
                ec = jsonpointer_errc::index_exceeds_array_size;
                return current;
            }
            std::size_t index{0};
            auto result = jsoncons::dec_to_integer(buffer.data(), buffer.length(), index);
            if (!result)
            {
                ec = jsonpointer_errc::invalid_index;
                return current;
            }
            if (index >= current->size())
            {
                ec = jsonpointer_errc::index_exceeds_array_size;
                return current;
            }
            current = std::addressof(current->at(index));
        }
        else if (current->is_object())
        {
            if (!current->contains(buffer))
            {
                ec = jsonpointer_errc::key_not_found;
                return current;
            }
            current = std::addressof(current->at(buffer));
        }
        else
        {
            ec = jsonpointer_errc::expected_object_or_array;
            return current;
        }
        return current;
    }

    template <typename Json>
    Json* resolve(Json* current, const typename Json::string_view_type& buffer, bool create_if_missing, std::error_code& ec)