It seems to me that what you want to do is differentiate
between lines that contain a closing brace and those that
do not; whitespace should be irrelevant. In that case, how
about something like this modification:
script_body:
'{' script_line(s?) /\s*/s '}'
script_line:
<skip: ''> /\s*/s /[^}]*/
The idea is to only skip lines that have no closing brace
within them. If the line does have a closing brace,
script_line will fail, and after
eating whitesapce, the closing brace will match.
(Apologies if this isn't correct syntax; I have never used
Parse::RecDescent before.)
If script lines can contain closing braces, then you
will need to do a bit more parsing (matching braces, etc.)
-Mark
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