RE: [sv-ec] Mantis 1702 - queue concatenation

 Jonathan,

I am catching on this just now. I am fine with making assignment pattern
legal for
assigning to queue.

Francoise
    '

-----Original Message-----
From: owner-sv-ec@eda.org [mailto:owner-sv-ec@eda.org] On Behalf Of
Jonathan Bromley
Sent: Tuesday, November 13, 2007 3:16 AM
To: sv-ec@eda.org
Subject: RE: [sv-ec] Mantis 1702 - queue concatenation

A follow-up to the previous email:

It seems to me that assignment-pattern syntax '{} should also be legal
for creating queue expressions, with the proviso that every item in the
'{} should be an individual element of the queue.  This matches the use
of '{} for dynamic arrays.

Consequently, all the following would be legal:

  int Q[$];

  Q = {1,2,3}; // queue concat
  Q = '{1,2,3}; // assignment pattern
  Q = {4, Q, 5}; // queue concat

but this would not:

  Q = '{4, Q, 5};  // 2nd item is wrong type

The LRM is currently fairly quiet about whether '{} is OK for queue
expressions; would everyone be OK with making it legal explicitly?

Having both forms is quite useful.  Items in a '{} are in an
assignment-like context, making some items legal that would not be legal
in a queue concat.  But there's no plausible way (as far as I can see)
to make '{} accept a mixture of queue and element items.  So I think we
should permit both forms.
--
Jonathan Bromley, Consultant

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