Re: [boost] [random] A much faster Poisson variate generation

Subject: Re: [boost] [random] A much faster Poisson variate generation
From: Ross Levine (ross.levine_at_[hidden])
Date: 2009-01-14 15:13:29

I have removed the MPL: the code was there to use an int instead of a
long for the factorial lookup table if the size of an int was large
enough. Ultimately, the rare case in which this would be useful (when
8 <= sizeof(int) < sizeof(long)) is not worth code that won't compile
on some compilers.
The class now has an empty reset() member function for compatibility,
and passes random_test.cpp's test_main function as well, and can serve
as a drop-in replacement of the existing poisson_distribution.hpp
file. Notably, operator<< and operator>> are compatible with the old
version, streaming only the mean.

I am unaware of how to officially submit this header, and where to
change documentation.

Thanks,

Ross

On Tue, Jan 6, 2009 at 5:19 AM, Paul A. Bristow <pbristow_at_[hidden]> wrote:
>> -----Original Message-----
>> From: boost-bounces_at_[hidden] [mailto:boost-bounces_at_[hidden]]
> On
>> Behalf Of Paul A. Bristow
>> Sent: 05 January 2009 15:25
>> To: boost_at_[hidden]
>> Subject: Re: [boost] [random] A much faster Poisson variate generation
>
> I have also just realized that your new version using MPL may have
> implications for 'obselete' compilers.
>
> It would be best if the old simpler version still worked for these
> compilers.
>
> Perhaps you have already given this some thought - I see some tests for MSVC
> <=1300 ?
>
> At least, it will require altering the Boost 'expected to fail' list.
>
> Paul
>
> ---
> Paul A. Bristow
> Prizet Farmhouse
> Kendal, UK   LA8 8AB
> [phone], mobile [phone]
> pbristow_at_[hidden]
>
>
>
>
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