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From Sébastien Brisard <sebastien.bris...@m4x.org>
Subject Re: [math] UnexpectedNegativeIntegerException
Date Thu, 23 Aug 2012 08:05:10 GMT
Hi Luc,

2012/8/23 Luc Maisonobe <Luc.Maisonobe@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...
Sébastien


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