Re: [sv-ec] RE: [sv-bc] Issues on Queue Operators

>From: "Jonathan Bromley" <jonathan.bromley@doulos.com>

>However, a queue has the property, not shared with a 
>dynamic array, that it may be resized merely by being
>the target of an assignment.  I believe this is the 
>only property of queues that is not shared with
>dynamic arrays.

What about the ability to extend the size of the queue
by assigning to an element just beyond the current end
of the queue?  That is a related but different property.


>The simplicity of the queue expression syntax could
>be rescued, and the rigour of assignment patterns 
>preserved, if we could introduce an additional notation
>into assignment patterns: an "array explode" operation
>that would act, within an assignment pattern and only
>within an assignment pattern, as if it were replaced by
>a comma-separated list of the array's elements.  Only one
>dimension of an array could be thus exploded.

I agree that this is probably the best approach.


> I'm tempted
>to use inside-out curly brackets for that, on the grounds
>that it's almost exactly the inverse of concatenation...
>
>// append one int to a queue of ints
>
>Q = '{ }Q{ , 7 };
>
>but it's so ugly that I give up and leave it to someone
>else to invent the right syntax.

I don't know if there are any characters left unused in Verilog :-)
And you want something concise.


Steven Sharp
sharp@cadence.com