James Mastros wrote: > > Guys, can we please not argue over just how arithmetic > and such works for NaN and Inf, and defer to IEEE specs > (IEEE-754, AKA IEEE floating point)? It'll save much > argument, and that's how it'll almost certianly be > implemented anyway.
NaN requires a pragma. As such, shouldn't documenting it be deferred till later? And then, you might want to take a look at: o IEEE 754 Support in C99 document http://grouper.ieee.org/groups/754/meeting-materials/2001-07-18-c99.pdf o IEEE 754 web page http://grouper.ieee.org/groups/754/ > Give examples and references: In chronological order: Damian Conway: > Perl NaN's will not be IEEE 754 compliant. Damian: > NaN is dead. [...] > Except perhaps under a C<use IEEE> pragma of some kind, in > which case it would be a proper IEEE Norweigian Blue NaN. Larry: > > : IIRC, native data types, which are all lowercase (e.g., > : int, bit, long, etc.) cannot be undef. However, their > : class equivalents (e.g., Int, Bit, Long, etc) can be undef. > > That is correct. It probably throws an exception if you > try to assign an undefined value to a lowercase type. > (Though an IEEE num might well set itself to NaN instead.) So there you have it. NaN is outside the core... or at least a pragma away... Or pickup a thread: http://www.mail-archive.com/perl6-language@perl.org/msg08521.html http://www.mail-archive.com/perl6-language@perl.org/msg08359.html http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=Pine.LNX.4.44.021 0311948500.18773-100000%40london.wall.org&rnum=1&prev=/groups%3Fnum%3D20%26h l%3Den%26lr%3D%26ie%3DISO-8859-1%26q%3D%2B%2522IEEE%2522%2Bgroup%253Aperl.pe rl6.language%2Bauthor%253ALarry%2Bauthor%253AWall -- Garrett Goebel IS Development Specialist ScriptPro Direct: 913.403.5261 5828 Reeds Road Main: 913.384.1008 Mission, KS 66202 Fax: 913.384.2180 www.scriptpro.com [EMAIL PROTECTED]
