Re: [sv-ec] Randomizing size of associative arrays

Thanks - I hadn't found that thread. I've also just found the Mantis (889), 
which escaped me even though it's marked all over the draft in 17.4... perhaps 
I'm going colorblind and can no longer see red.

Anyway, there's still the issue of the inconsistency with 17.5.7, which says 
that you _can_ constrain the size of an associative array. It looks like all we 
need is a fix to that section:

In D4 sec. 17.5.7, p.393, paragraph 6, change:

   "The size method of a dynamic or associative array can be used to constrain 
the size of the array"

to:

   "The size method of a dynamic array can be used to constrain the size of the 
array"

Does this sound reasonable?

--Mike

Bresticker, Shalom wrote:
> There was a long email thread on this starting at
> http://www.eda-stds.org/sv-ec/hm/3293.html , started by a guy named Ray
> Ryan.
> 
> Shalom
>  
> 
>> -----Original Message-----
>> From: owner-sv-ec@server.eda.org 
>> [mailto:owner-sv-ec@server.eda.org] On Behalf Of Ryan, Ray
>> Sent: Thursday, October 11, 2007 10:12 PM
>> To: Michael Burns; sv-ec@server.eda.org
>> Subject: RE: [sv-ec] Randomizing size of associative arrays
>>
>>
>> In section 17.4 (Random Variable), there are two consecutive bullets.
>>  - Dynamic and associative arrays can be declared rand or 
>> randc. All of the elements in the array are randomized, 
>> overwriting any previous data.
>>
>>  - The size of a dynamic array declared as rand or randc can 
>> also be constrained. ...
>>
>> This explicitly allows associative arrays to be declared as 
>> random variable. The second bullet only allows size 
>> constraints on dynamic array. As consecutive points, it seems 
>> clear that constraining the size of an associative array is 
>> not allowed.
>> I believe there was some earlier discussion on this and that 
>> the ommission of associative arrays was intentional.
>>
>> - Ray
>>
>>> -----Original Message-----
>>> From: owner-sv-ec@server.eda.org
>>> [mailto:owner-sv-ec@server.eda.org] On Behalf Of Michael Burns
>>> Sent: Wednesday, October 10, 2007 6:35 PM
>>> To: sv-ec@server.eda.org
>>> Subject: [sv-ec] Randomizing size of associative arrays
>>>
>>>
>>> Hi folks,
>>>
>>> Is it intended to be able to constrain and randomize the size of an 
>>> associative array? Draft 4 sec. 17.4 p385 paragraph 3 talks about 
>>> constraining the size of a dynamic array, but not an associative 
>>> array. In the absence of any other language, one would naturally 
>>> assume that the intention was not to allow constraining the 
>> size of an 
>>> associative array. However, section 17.5.7 p.393 paragraph 
>> 6 uses very 
>>> similar language, but does include associative arrays. If 
>> the intent 
>>> is to allow randomizing the size of an associative array, 
>> I'd like to 
>>> hear how it was supposed to work - I'm having trouble imagining 
>>> anything useful, particularly for non-integral index types. On the 
>>> other hand, it would certainly be useful for associative array 
>>> randomization to preserve existing size and indices, and only 
>>> randomize the values.
>>>
>>> If there's a mantis on this already, I'd like to address it in this 
>>> round. If not, I'd like to know so I can submit one.
>>>
>>> Thanks,
>>> Mike
>>>
>>>
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