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#!/usr/bin/perl -w
use Parse::RecDescent;
use Data::Dumper;
my $grammar = q{
s_expr: '(' s_expr(s) ')' # NESTED S-EXPRS
{ $return = $item[2] }
| /" [^\\"]* (\\. [^\\"]*)* "/x # STRINGS
| /[^()\s]+/ # ANYTHING ELSE
};
my $parser = Parse::RecDescent->new($grammar) or die;
undef $/;
my $data = <DATA>;
my $nested_array = $parser->s_expr($data);
print Data::Dumper->Dump($nested_array);
__DATA__
(net
(rename VDDTX "vddtx")
(joined
(portRef VDDTX)
(portRef &2
(instanceRef I_45_1102680350)))
(figure WIRE
(path
(pointList
(pt 6700 -2100)
(pt 6900 -2100)))
(path
(pointList
(pt 6900 -2100)
(pt 6900 -2500)))))
(net
(rename N00023 "N00023")
(joined
(portRef &2
(instanceRef I_45_1215476478))
(portRef &1
(instanceRef I_45_1102680350))
(portRef &2
(instanceRef I_45_1215470655)))
(figure WIRE
(path
(pointList
(pt 5800 -3400)
(pt 6900 -3400)))
(path
(pointList
(pt 5800 -3400)
(pt 5800 -3700)))
(path
(pointList
(pt 6900 -3100)
(pt 6900 -3400)))
(path
(pointList
(pt 8000 -3400)
(pt 8000 -3700)))
(path
(pointList
(pt 6900 -3400)
(pt 8000 -3400))))
(instance
(rename TIE1 "TIE1")
(viewRef XTIE0A2Y2
(cellRef XTIE0A2Y2
(libraryRef RIPPER_LIBRARY)))
(transform
(origin
(pt 6900 -3400)))))