dmd 2.029 release

[Masahiro Nakagawa]

On Thu, 23 Apr 2009 03:12:16 +0900, Andrei Alexandrescu  
<SeeWebsiteForEmail at erdani.org> wrote:

> Steven Schveighoffer wrote:
>> On Wed, 22 Apr 2009 13:49:18 -0400, Andrei Alexandrescu  
>> <SeeWebsiteForEmail at erdani.org> wrote:
>>
>>> tama wrote:
>>>> On Mon, 20 Apr 2009 16:09:09 +0900, Walter Bright
>>>> <newshound1 at digitalmars.com> wrote:
>>>>
>>>>>
>>>>> This is a major revision to Phobos, including Andrei's revolutionary
>>>>> new range support.
>>>>>
>>>>> http://www.digitalmars.com/d/2.0/changelog.html
>>>>> http://ftp.digitalmars.com/dmd.2.029.zip
>>>>
>>>> Range is so cool!
>>>>
>>>> Though...
>>>> I tried following code:
>>>>
>>>> void main()
>>>> {
>>>>     writeln("Case1");
>>>>     {
>>>>         Mt19937 gen = Mt19937(0);
>>>>         writeln(gen.front);
>>>>         gen.popFront;
>>>>         writeln(gen.front);
>>>>     }
>>>>     writeln("---");
>>>>     {
>>>>         Mt19937 gen = Mt19937(0);
>>>>         advance(gen, 1);  // skip 1 element
>>>>         writeln(gen.front);
>>>>         gen.popFront;
>>>>         writeln(gen.front);
>>>>     }
>>>>     writeln("\nCase2");
>>>>     {
>>>>         Mt19937 gen;
>>>>         writeln(gen.front);
>>>>         gen.popFront;
>>>>         writeln(gen.front);
>>>>     }
>>>>     writeln("---");
>>>>     {
>>>>         Mt19937 gen;
>>>>         advance(gen, 1);  // skip 1 element
>>>>         writeln(gen.front);
>>>>         gen.popFront;
>>>>         writeln(gen.front);
>>>>     }
>>>> }
>>>>
>>>> Result:
>>>>
>>>> Case1
>>>> 2357136044 (1)
>>>> 2546248239 (2)
>>>> ---
>>>> 2546248239 (2)
>>>> 3071714933 (3)
>>>>
>>>> Case2
>>>> 581869302  (1)
>>>> 3890346734 (2)
>>>> ---
>>>> 581869302  (1)?
>>>> 3890346734 (2)?
>>>>
>>>> I think 'Case1' is correct, but 'Case2' is wrong.
>>>> Mt19937's bug?
>>>>
>>>
>>> If you initialize the Mersenne twister with no seed it will start with
>>> seed 5489u.
>>  I think his point is in the second part of Case2, he skipped one  
>> element, but it appears that it didn't skip anything.
>
> Oh ok, thanks tama and Steve. I know where the problem is (on the  
> Mersenne twister, if you call popFront without ever calling head there's  
> a bug). Could you submit a bug? I'm on battery and on short time, and  
> Walter is bugging me :o).
I submitted this problem to bugzilla.
http://d.puremagic.com/issues/show_bug.cgi?id=2882

-- 
tama <repeatedly at gmail.com>
http://profile.livedoor.com/repeatedly/