perl regex modifiers

[Alex Rice]

Mark's question just now reminded me of something I've been wondering. 
What Perl regex modifiers does RR support? The Transcript Dict. 
mentions only (?i) for case insensitive.

"""
The stringToChange and matchExpression are always case-sensitive, 
regardless of the setting of the caseSensitive property.  (If you need 
to make a case-insensitive comparison, use “(?i)” at the start of the 
matchExpression to make the match case-insensitive.)
"""

I assumed that other Perl modifiers could be used, like "g" for global 
replace, like this

"(?g)!.+/!"

But but I get "bad parameter". The equivalent Perl would be

$someStr =~ s|!.+/!||g;

(actually this is a bad example because the regex is greedy and will 
match everything between the first ! and the last /!) but just in 
general: what Perl modifiers are supported?

Alex Rice, Software Developer
Architectural Research Consultants, Inc.
http://ARCplanning.com