[ic] Interpret arguments to usertag

[Kevin Walsh]

> >I'm having difficulty understanding one part of the usertag capability. I 
> >need to pass a dynamic argument to a usertag, but it never seems to be 
> >interpreted properly.
> >
> >Specifically:
> >
> >         [tag xyz [data session arg] ]
> >
> >Never interprets [data session arg]. What am I missing?
> >
> >My sample "tag" is defined as follows:
> >
> >UserTag tag Order action arg
> >UserTag tag Interpolate
> 
> UserTag tag PosNumber 2
> 
[yourtag action="xyz" arg="[data session arg]"]

If you will always be using [data session arg] then you could drop
the arg parameter altogether and just use $Vend::Session->{arg} in
your UserTag.  If you will be passing all manner of values to the
arg then just keep it as it is, but change the calling syntax, as
shown.

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