Tim suggested: > I *like* the proposed Perl6 semantics; it's DWIMier. The problem is > just the name collision. Why not 'inval' (for invalid), or some > such (badval?). This would preserve NaN in its IEEE sense for the > numerical algorithm crew to use.
And thus we circle back towards C<fail>. I'll mention this to Larry (who's probably watching silently over us anyway). Damian