Agreed - but what do we do if NOT is_iec559? Give up? #error "Can only work with IEEE 754!"
Or choose a massive amount of decimal digits? eg 40? Paul Paul A Bristow, Prizet Farmhouse, Kendal, Cumbria, LA8 8AB UK +44 1539 561830 Mobile +44 7714 33 02 04 mailto:[EMAIL PROTECTED] | -----Original Message----- | From: [EMAIL PROTECTED] | [mailto:[EMAIL PROTECTED] Behalf Of Daryle Walker | Sent: Monday, August 18, 2003 7:05 AM | To: Boost | Subject: [boost] Re: Insufficient significant digits using lexical_cast | | | On Sunday, August 17, 2003, at 10:33 PM, Paul A. Bristow wrote: | | [SNIP] | > But you are right that it would be better to check that | > numeric_limits::digits exists and isn't something silly before using | > the formula. With all the built-in floating point types it should be | > fine, and for other (well) User defined floating point types too. (I | > will look at this). | [TRUNCATE] | | I think you need to check numeric_limits::radix since your algorithm | had a base-2-to-10 conversion (the type may not actually be binary!). | The algorithm was based off a paper about IEEE-754; if IEEE-754 is a | requirement, you may have to check for that too (via | numeric_limits::is_iec559). Remember that even the built-in | floating-point types aren't guaranteed to match IEEE-754! | | Daryle | | _______________________________________________ | Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost | | _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
