Re: [boost] [Bug Sprint] Ticket #351

Subject: Re: [boost] [Bug Sprint] Ticket #351
From: Eric Niebler (eric_at_[hidden])
Date: 2009-06-05 13:55:45

Marshall Clow wrote:
> At 8:19 PM +0300 6/5/09, Peter Dimov wrote:
>> Marshall Clow:
>>> https://svn.boost.org/trac/boost/ticket/351 is the oldest "bug" in 
>>> the trac system.
>>>
>>> I'm trying to figure out what Jens meant in his last comment (dated 
>>> 4-11-2005),
>>> where he said "See issue 4.40 in the C++ committee's library TR issue 
>>> list".
>>>
>>> I looked at the current version of the library issues list 
>>> <http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-active.html>, and 
>>> they don't have a 4.40 :-(
>>> I looked at revision #33 of this document (from April 2005), and they 
>>> didn't have a 4.40 either.
>>> Anyone know what document he was referring to?
>>
>> This one:
>>
>> http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2005/n1837.pdf
> 
> Thank you!
> 
> Since this was a "bug" in the TR1 specification, and it has been resolved,
> I think that we can close this as "won't fix" with an explanation and a 
> link to the resolution.
> 
> If no one objects, I will do this tonight.

The resolution seems to imply that the ctor that takes a non-const 
Generator should be changed to not accept mersenne_twister objects. So 
this ...

   template<class Generator>
   explicit mersenne_twister(Generator & gen) { seed(gen); }

... should be changed to this ...

   template<class Generator>
   explicit mersenne_twister(Generator & gen,
     typename disable_if<is_same<Generator, mersenne_twister> >::type* =0)

HTH,

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com