It should be a stupid question. But I still hope for any response. Could anyone tell me pls why the following code doesn't work ?

uint numberOfSubsets(uint n) {
	return (1 << n) - 1;
}

void main(char[][] args) {
	int[int] a[];
	a.length = numberOfSubsets(3);
}
The generated program runs endlessly. I'm using D2.
Ran

On Tue, 21 Oct 2008 21:24:28 +0400, Ran <saotome.ran@googlemail.com> wrote:

> It should be a stupid question. But I still hope for any response. Could anyone tell me pls why the following code doesn't work ?
>
> uint numberOfSubsets(uint n) {
> 	return (1 << n) - 1;
> }
>
> void main(char[][] args) {
> 	int[int] a[];
> 	a.length = numberOfSubsets(3);
> }
> The generated program runs endlessly. I'm using D2.
> Ran

This is a bug, try wrapping the assoc. array in a struct so that you make array of structs instead of array of maps. It should help.

On Tue, Oct 21, 2008 at 1:31 PM, Denis Koroskin <2korden@gmail.com> wrote:
> On Tue, 21 Oct 2008 21:24:28 +0400, Ran <saotome.ran@googlemail.com> wrote:
>
>> It should be a stupid question. But I still hope for any response. Could anyone tell me pls why the following code doesn't work ?
>>
>> uint numberOfSubsets(uint n) {
>>        return (1 << n) - 1;
>> }
>>
>> void main(char[][] args) {
>>        int[int] a[];
>>        a.length = numberOfSubsets(3);
>> }
>> The generated program runs endlessly. I'm using D2.
>> Ran
>
> This is a bug, try wrapping the assoc. array in a struct so that you make array of structs instead of array of maps. It should help.
>

It's a bug that's been around for way too fucking long, excuse the language.  It's apparently a one-character change in the typeinfo for AAs.

"Jarrett Billingsley" wrote
> On Tue, Oct 21, 2008 at 1:31 PM, Denis Koroskin <2korden@gmail.com> wrote:
>> On Tue, 21 Oct 2008 21:24:28 +0400, Ran <saotome.ran@googlemail.com> wrote:
>>
>>> It should be a stupid question. But I still hope for any response. Could anyone tell me pls why the following code doesn't work ?
>>>
>>> uint numberOfSubsets(uint n) {
>>>        return (1 << n) - 1;
>>> }
>>>
>>> void main(char[][] args) {
>>>        int[int] a[];
>>>        a.length = numberOfSubsets(3);
>>> }
>>> The generated program runs endlessly. I'm using D2.
>>> Ran
>>
>> This is a bug, try wrapping the assoc. array in a struct so that you make array of structs instead of array of maps. It should help.
>>
>
> It's a bug that's been around for way too fucking long, excuse the language.  It's apparently a one-character change in the typeinfo for AAs.

FYI, this was just posted to the bug report:

> http://d.puremagic.com/issues/show_bug.cgi?id=929
>
>
>
>
>
> ------- Comment #15 from kamm-removethis@incasoftware.de  2008-10-21 
> 12:40 -------
> Just to make the patch more explicit: Adding
>
> int TypeAArray::isZeroInit()
> {
>    return 1;
> }
>
> to mtype.c and the matching prototype to mtype.h fixes it. Tested in LDC.

-Steve

On Tue, Oct 21, 2008 at 3:41 PM, Steven Schveighoffer <schveiguy@yahoo.com> wrote:
> "Jarrett Billingsley" wrote
>> On Tue, Oct 21, 2008 at 1:31 PM, Denis Koroskin <2korden@gmail.com> wrote:
>>> On Tue, 21 Oct 2008 21:24:28 +0400, Ran <saotome.ran@googlemail.com> wrote:
>>>
>>>> It should be a stupid question. But I still hope for any response. Could anyone tell me pls why the following code doesn't work ?
>>>>
>>>> uint numberOfSubsets(uint n) {
>>>>        return (1 << n) - 1;
>>>> }
>>>>
>>>> void main(char[][] args) {
>>>>        int[int] a[];
>>>>        a.length = numberOfSubsets(3);
>>>> }
>>>> The generated program runs endlessly. I'm using D2.
>>>> Ran
>>>
>>> This is a bug, try wrapping the assoc. array in a struct so that you make array of structs instead of array of maps. It should help.
>>>
>>
>> It's a bug that's been around for way too fucking long, excuse the language.  It's apparently a one-character change in the typeinfo for AAs.
>
> FYI, this was just posted to the bug report:
>
>> http://d.puremagic.com/issues/show_bug.cgi?id=929
>>
>>
>>
>>
>>
>> ------- Comment #15 from kamm-removethis@incasoftware.de  2008-10-21
>> 12:40 -------
>> Just to make the patch more explicit: Adding
>>
>> int TypeAArray::isZeroInit()
>> {
>>    return 1;
>> }
>>
>> to mtype.c and the matching prototype to mtype.h fixes it. Tested in LDC.
>
> -Steve
>
>
>

Downs posted an equivalent solution over a year ago to the same bug.

"Jarrett Billingsley" wrote
> On Tue, Oct 21, 2008 at 3:41 PM, Steven Schveighoffer <schveiguy@yahoo.com> wrote:
>> "Jarrett Billingsley" wrote
>>> On Tue, Oct 21, 2008 at 1:31 PM, Denis Koroskin <2korden@gmail.com> wrote:
>>>> On Tue, 21 Oct 2008 21:24:28 +0400, Ran <saotome.ran@googlemail.com> wrote:
>>>>
>>>>> It should be a stupid question. But I still hope for any response.
>>>>> Could
>>>>> anyone tell me pls why the following code doesn't work ?
>>>>>
>>>>> uint numberOfSubsets(uint n) {
>>>>>        return (1 << n) - 1;
>>>>> }
>>>>>
>>>>> void main(char[][] args) {
>>>>>        int[int] a[];
>>>>>        a.length = numberOfSubsets(3);
>>>>> }
>>>>> The generated program runs endlessly. I'm using D2.
>>>>> Ran
>>>>
>>>> This is a bug, try wrapping the assoc. array in a struct so that you
>>>> make
>>>> array of structs instead of array of maps. It should help.
>>>>
>>>
>>> It's a bug that's been around for way too fucking long, excuse the language.  It's apparently a one-character change in the typeinfo for AAs.
>>
>> FYI, this was just posted to the bug report:
>>
>>> http://d.puremagic.com/issues/show_bug.cgi?id=929
>>>
>>>
>>>
>>>
>>>
>>> ------- Comment #15 from kamm-removethis@incasoftware.de  2008-10-21
>>> 12:40 -------
>>> Just to make the patch more explicit: Adding
>>>
>>> int TypeAArray::isZeroInit()
>>> {
>>>    return 1;
>>> }
>>>
>>> to mtype.c and the matching prototype to mtype.h fixes it. Tested in LDC.
>>
>> -Steve
>>
>>
>>
>
> Downs posted an equivalent solution over a year ago to the same bug.

I meant FWI.  (For Walter's Info) ;)

-Steve