nl_tokens: The properties $1 .. $9 are the first nine capturing substrings of the last successful match or . The function RegExpMakeCaptureGetter will be called with indices from 1 to 9 .
pl_tokens: function RegExpMakeCaptureGetter ( n ) { return function foo ( ) { var index = n * 2 ; if ( index >= NUMBER_OF_CAPTURES ( RegExpLastMatchInfo ) ) return '' ; var matchStart = RegExpLastMatchInfo [ CAPTURE ( <mask> ) ] ; var matchEnd = RegExpLastMatchInfo [ CAPTURE ( index + 1 ) ] ; if ( matchStart == - 1 || matchEnd == - 1 ) return '' ; return % _SubString ( LAST_SUBJECT ( RegExpLastMatchInfo ) , matchStart , matchEnd ) ; } ; }