{bob is {a cool guy}}

##</code><code>##

<bob> is <a> cool guy </a></bob>

##</code><code>##

#!/usr/bin/perl -w

use diagnostics;
use Parse::RecDescent;
use Text::Balanced qw(
		      extract_bracketed
		      );

#input
print "Name of file to be inputted? :";
$infile=<>;
print "What should the output file be named? The file will be automatically created. :";
$outfile=<>;
chomp $infile;
$/=undef;
open INFILE, "<$infile";
$text=<INFILE>;
close INFILE;

#processing
my $counter = 0;
while($next = (extract_bracketed($text, '{}', '[^{}]*' ))[0])
{
    $holder = $next;
    while($bext = (extract_bracketed($next, '{}', '(?s).*?(?=\{code)' ))[0]) 
    {
	$bolder = $bext;
	while($cext = (extract_bracketed($bext, '{}', '(?s).*?(?=\{escape)' ))[0])
	{
	    $colder = $cext;
	    $cext =~ s/\{([^ \s|\}]*?)\}/<$1\/>/gix;
	    $cext =~ s/\{([\w|-]*)(.*)\}/<$1>$2<\/$1>/osi;
	    $bext =~ s/$colder/$cext/sgi;
	}
	$bext =~ s/\{(\w*?)\s(.*)\}/\<$1\>$2<\/$1>/gosix;
	$bext =~ s/\{metavar(.*?)\}/<metavar>$1<\/metavar>/gosix;
	$bext =~ s/\}/ebrac/g;
	$bext =~ s/\{/obrac/g;
	$next =~ s/$bolder/$bext/sgi;
    }
    $next =~ s/\{([^ \s|\}]*?)\}/<$1\/>/gix;
    $next =~ s/\{([\w|-]*)(.*)\}/<$1>$2<\/$1>/osi;
    $text =~ s/$holder/$next/sgi;    
    print "Sync check \#$counter\n";
    print "$next\n";
    $counter++;
}

#output
open FILEOUT, ">$outfile";
print FILEOUT $text;
close FILEOUT;
print "\nYour result is stored in file $outfile\nGoodbye.\n";