On Thu, Aug 23, 2012 at 10:05:10AM +0200, Sébastien Brisard wrote: > Hi Luc, > > 2012/8/23 Luc Maisonobe <luc.maison...@free.fr>: > > Le 23/08/2012 05:16, Sébastien Brisard a écrit : > >> Hi, > >> in MATH-849, I have proposed an implementation of Gamma(x) > >> (previously, class Gamma had only logGamma(x)). Gamma(x) is not > >> defined for x negative integer. In such instances, I would like to > >> throw an exception instead of returning Double.NaN. However, creating > >> a new exception in o.a.c.m.exception seems exagerated, since it's very > >> unlikely that this exception should be used elsewhere (or maybe). > >> Should I define a nested exception instead [1]? > >> > >> What do you think of the name "UnexpectedNegativeIntegerException"? It > >> does not really match the pattern of already defined exceptions, but I > >> can't find a better name. > > > > Don't we already have NotPositiveException? > > > > Luc > > > We do, but Gamma is defined for all negative values, except integer ones...
I think that in some circumstances, it might be useful to not throw exceptions... FastMath's "log" returns NaN for negative input. Gilles --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
