The pass_handler does exactly what its name implies: it passes the error as generated by the encoding object through without touching it. Unlike ztd::text::assume_valid_handler </api/error handlers/assume_valid_handler>, this one does not invoke undefined behavior because it does not meet the requirements for the ztd::text::is_ignorable_error_handler </api/is_ignorable_error_handler> trait.
ztd::text::pass_handler
ztd::text::pass_handler_t