Here's an example w/ XML::Rules. Note that getting at the underlying expat parser is undocumented, but I'm sure Jenda would be willing to add something as part of the official API :-) use strict;
use warnings;
use XML::Rules;
my @rules = (
gibsonca => undef,
_default => sub {
no warnings 'uninitialized';
return if $_[1]->{_content} =~ /\S/;
my $p = $_[4]{parser};
print $p->current_line(),"\n";
return;
},
);
my $xr = XML::Rules->new(rules => \@rules);
$xr->parse(<<XML);
<gibsonca>
<abc>fds </abc> <!-- ok -->
<ddd></ddd> <!-- not ok -->
<eee> </eee> <!-- not ok -->
</gibsonca>
XML
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