Re: [sv-ec] {}

This seems to be a bit beyond being purely Editorial in nature.

Neil



On 07/27/09 15:14, Brad Pierce wrote:
> Couldn't this be treated as an editorial issue?  The intent of the SV-EC was clear on this point.
> 
> -- Brad
> 
> ________________________________________
> From: owner-sv-ec@eda.org [owner-sv-ec@eda.org] On Behalf Of jonathan.bromley@doulos.com [jonathan.bromley@doulos.com]
> Sent: Monday, July 27, 2009 3:05 PM
> To: Bresticker, Shalom; sv-ec@eda.org
> Subject: Re: [sv-ec] {}
> 
> Shalom,
> 
>> There seems to be an ambiguity in the LRM on the use of {} to denote
>> an empty array.
>>
>> On the one hand, the LRM seems to restrict it to queues.
>> The BNF non-terminal "primary" contains "empty_queue", defined as "{ }",
> 
>> and footnote 31 says that "{ } shall only be legal in the context ofa
> queue".
>> On the other hand, 10.10 says,
> [...]
> 
> Mea culpa.  This is clearly an oversight in Mantis 1702.
> I recall that I looked at the BNF and decided that no change
> was needed because the existing production "concatenation"
> does all that's required for unpacked array concatenation,
> except that it does not admit the empty form {}, for which
> the existing production "empty_queue" suffices.  But I missed
> the footnote which, as you say, introduces doubt in the
> reader's mind - especially when taken with the name
> of the production "empty_queue".
> 
> It would probably be best to rename "empty_queue" to
> "empty_concatenation" and reword the offending footnote.
> I'll raise a new Mantis for this.
> 
> Thanks
> --
> Jonathan Bromley
> Consultant
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