[sv-bc] Query regarding equality/inequality operation on virtual interface variable

Hi,
According to SV 2009 draft LRM Section 25.9,
"Only the following operations are directly allowed on virtual interface 
variables:
— Assignment ( = ) to the following:
— Another virtual interface of the same type
— An interface instance of the same type
— The special constant null
— Equality ( == ) and inequality ( != ) with the following:
— Another virtual interface of the same type
— An interface instance of the same type
— The special constant null "
and "A virtual interface declaration may select a modport of an 
interface in which case
the modport is also part of its type."
Again, "An interface instance or virtual interface with no modport 
selected may be
assigned to a virtual interface with a modport selected" though they are 
of different types.

But equality/inequality operation on virtual interface with modport 
selected, with interface
instance or virtual interface with no modport selected is not allowed. 
Please confirm.

Thanks and Regards,
Ishita.



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