Bug in setwidget?

[Mat]

As per example for SetWidget given in docs, under "Conditional Variable Assignment":

<$set name="myVariable" filter="" value="It's magic" emptyValue="It's not magic">
<$text text=<<myVariable>>/>
</$set>

As seen, I have edited the filter to be totally emtpy. 

IMO the result should be the emptyValue... but it returns the value (It's magic). Surely that can't be correct or do I misunderstand something?

<:-)

[Eric Shulman]

The TW parser doesn't differentiate between a parameter with a blank value and a parameter that is not specified at all.  Thus, since filter="", it's as if you had just written

<$set name="myVariable" value="It's magic">

(the emptyValue="..." param is ignored unless a non-blank filter is used)

-e