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 Doulos - Developing Design Know-how VHDL * Verilog * SystemVerilog * SystemC * PSL * Perl * Tcl/Tk * Project Services Doulos Ltd. Church Hatch, 22 Market Place, Ringwood, Hampshire, BH24 1AW, UK Tel: + 44 (0)1425 471223 Email: jonathan.bromley@doulos.com Fax: +44 (0)1425 471573 http://www.doulos.com -------------------------------------------------------------------------------- Doulos Ltd is registered in England and Wales with company no. 3723454 Its registered office is 4 Brackley Close, Bournemouth International Airport, Christchurch, BH23 6SE, UK. This message may contain personal views which are not the views of Doulos, unless specifically stated. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.Received on Mon Jul 27 15:06:14 2009
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