SimpleLink ctor

[Marc.Volmer@oenzl.siemens.de (Volmer, Marc)]

Hi,

Could someone please explain to me the meaning of the
following lines found in /tcl/lib/ns-link.tcl

SimpleLink instproc init ....  {
....
....
if {[[$q info class] info heritage ErrorModule] == "ErrorModule"} {

     set head_ [$q classifier] }
...
...
}

1> Does the first line mean: if q belongs to a class which inherits from class ErrorModule ?

2> I don't understand [$q classifier].

q is a parameter given to the SimpleLink constructor and represents a queue from a specific
type. I searched the ns sources but couldn't find anywhere a place where a method "classifier"
was defined for a queue.

I hope someone will be able to help me.

Marc Volmer