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#!/usr/bin/perl -w
# CONVERT FROM ONE EXTERNAL STRUCTURE TO A
# SLIGHTLY DIFFERENT INTERNAL STRUCTURE
#
# LOCALIZED RULEVARS ARE ALWAYS EASIEST WHEN CHANGING STRUCTURES
# SEE demo_restructure_painful.pl FOR ANOTHER APPROACH THAT SHOWS WHY
use strict;
use Parse::RecDescent;
use Data::Dumper;
my $grammar = q(
file: <rulevar: local $file>
file: section(s)
{ $file }
section: header '{' body '}'
{ $file->{$item[1]} = $item[3] }
header: 'Domain=' /.+/
body: <rulevar: local $body>
body: line(s)
{ $body }
line: lineA | lineB
lineA: /[^\W_]+/ '=' /.+/
{ $body->{$item[1]} = $item[3] }
lineB: /[^\W_]+/ '_' /[^\W_]+/ '=' /.+/
{ $body->{$item[1]}{$item[3]} = $item[5] }
);
my $parser = Parse::RecDescent->new($grammar);
my $text;
my @text = <DATA>;
foreach (@text)
{
next if /^\#/; # Strip comments
$text .= $_;
}
my $f = $parser->file($text);
print Dumper ($f);
__DATA__
#
#
Domain=domain1
{
P1_Name=n1
P1_Address=host1:port1
P2_Name=n2
P2_Address=host2:port2
}
Domain=domain2
{
f1=v1
f2=v2a v2b
#comment
}