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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 }