Class exception

3rd/json/include/nlohmann/json.hpp:145–168

! @brief general exception of the @ref basic_json class This class is an extension of `std::exception` objects with a member @a id for exception ids. It is used as the base class for all exceptions thrown by the @ref basic_json class. This class can hence be used as "wildcard" to catch exceptions. Subclasses: - @ref parse_error for exceptions indicating a parse error - @ref invalid_iterator for

@since version 3.0.0
*/
class exception : public std::exception
{
  public:
    /// returns the explanatory string
    const char* what() const noexcept override
    {
        return m.what();
    }

    /// the id of the exception
    const int id;

  protected:
    exception(int id_, const char* what_arg) : id(id_), m(what_arg) {}

    static std::string name(const std::string& ename, int id_)
    {
        return "[json.exception." + ename + "." + std::to_string(id_) + "] ";
    }

  private:
    /// an exception object as storage for error messages
    std::runtime_error m;
};

/*!
@brief exception indicating a parse error