#!/usr/bin/perl

use Text::Balanced qw{extract_multiple extract_bracketed extract_delimited extract_tagged};

my $text = '<p>paragraph<b>BOLD text</p><a href=">>>>">link text</a><div><p>Some new text <b>in bold and <i>cursive</b></p></div><p>test</p>';

local $\ = $/;
print "text= $text";
my @stack;
my $error;

@fields = extract_multiple($text,
                   [
                        { Tag   => sub { extract_tagged($_[0]) } },
                        { Brack => sub { extract_bracketed($_[0],'<>') } },
                   ],
				   undef,
				   0
				   );
foreach my $elem (@fields){
	if(ref( $elem ) eq 'Tag'){
		(print_stack(), $error--) if defined $error;
		print "OK Tag: ".$$elem;
	}
	elsif(ref $elem eq 'Brack'){
		my ($otag) = $$elem =~ m#<([a-zA-Z0-9]+)>#;
		my ($ctag) = $$elem =~ m#</([a-zA-Z0-9]+)>#;
		
		add_to_stack($otag)      if defined $otag;
		remove_from_stack($ctag) if defined $ctag;
	}
	else {
		$error = 1;
	}
}

sub print_stack {
	foreach my $tag (@stack){
		print "not properly closed: ". $tag if defined $tag;
	}
}

sub add_to_stack {
	push @stack, shift;
}

sub remove_from_stack {
	my $tag =  shift;
	foreach my $c (reverse 0 .. @stack) {
		delete $stack[$c]	if($stack[$c] eq $tag ) 
	}
}

##</code><code>##

text= <p>paragraph<b>BOLD text</p><a href=">>>>">link text</a><div><p>Some new text <b>in bold and <i>cursive</b></p></div><p>test</p>
not properly closed: b
OK Tag: <a href=">>>>">link text</a>
not properly closed: i
OK Tag: <p>test</p>