Method diagnose

include/boost/parser/error_handling.hpp:325–338

    template<typename Context, typename Iter>
    void default_error_handler::diagnose(
        diagnostic_kind kind,
        std::string_view message,
        Context const & context,
        Iter it) const
    {
        parser::write_formatted_message(
            std::cerr,
            "",
            parser::_begin(context),
            it,
            parser::_end(context),
            message);
    }

    template<typename Context>
    void default_error_handler::diagnose(