[sv-bc] Question on 'Unpacked array concatenation'

Hi,
I have following question on 'Unpacked array concatenation'. Does it 
apply only on one dimensional unpacked array, or more than one 
dimensional array also can be assigned? For e.g.

int x[1:0][2:0];
int y[2:0];
x = {y, y}; // is it valid?

Also do we consider 'Unpacked array concatenation' as aggregate 
expression? LRM is not clear enough on that.

I feel 'Unpacked array concatenation' concept is too much context 
dependent having similar syntax with concatenation, which will make very 
complex to implement semantic checks/ expression evaluation etc. for the 
vendors when hierarchical reference/ forward typedefs etc. will be 
involved. Can we not use different syntax to support it?

-- 
Regards
Surya




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