xcomment: <skip: qr/[ \t]*/> newline(0..) '<!--' { ($text,$return) = main::parse_delimited($text,'<!--','-+->'); $return = ['xcomment',$return]; } #### comment: newline(0..) '/*' { ($text,$return) = main::parse_delimited($text,'/*','*/'); $return = ['comment',$return]; } #### #!/usr/bin/perl -w use strict; use Parse::RecDescent; use Text::DelimMatch; $::RD_ERRORS = 1; $::RD_WARN = 1; $::RD_HINT = 1; $::RD_TRACE = 1; my $grammar = q{ { sub parse_delimited { my $text = shift; my $startdelim = shift; my $enddelim = shift; my $mc = new Text::DelimMatch( $startdelim, $enddelim ); my ( $p, $m, $r ) = $mc->match( $text ); if ($p) { $text = $p; } else { $text = ""; } $text .= $r if ($r); $m =~ s/^$startdelim//; $m =~ s/$enddelim$//; return $text, $m; } } file: line(s) eofile { use Data::Dumper 'Dumper'; print Dumper @item} line: comment | eofile: /^\Z/ comment: '/*' { ($text,$return) = $thisparser->parse_delimited($text, '/*', '*/'); $return = ['comment',$return]; } }; my $parser = new Parse::RecDescent($grammar) or die "Bad grammar!\n"; while () { chomp; print "$_...\n"; defined($parser->file($_)) or print "Bad text!\n"; } __DATA__ /*Hello World */ #### Argument "/*" isn't numeric in addition (+) at C:/Perl/site/lib/Parse/RecDescent.pm line 2783, line 1. Use of uninitialized value in substitution (s///) at (eval 15)[C:/Perl/site/lib/Parse/RecDescent.pm:2618] line 22, line 1. Use of uninitialized value in concatenation (.) or string at (eval 15)[C:/Perl/site/lib/Parse/RecDescent.pm:2618] line 23, line 1. Use of uninitialized value in substitution (s///) at (eval 15)[C:/Perl/site/lib/Parse/RecDescent.pm:2618] line 23, line 1. Use of uninitialized value in substitution (s///) at (eval 15)[C:/Perl/site/lib/Parse/RecDescent.pm:2618] line 23, line 1.