https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102609
--- Comment #6 from waffl3x <waffl3x at protonmail dot com> --- I've noticed the standard does call `this` a specifier, I will perhaps rework the code to just do parsing in cp_decl_specifier_seq. (In reply to Gašper Ažman from comment #5) > And of course by "this" I meant support for a default argument on the > explicit object parameter. > > We might add it back in the future if we find a usecase. Great, I will just forbid it then, I can't think of a compelling reason to make it a warning even if it should be benign.