The callback routine, _add_link, is another method within the object and needs access to some of the object's data to work properly.
Is this something you could profitably use local for?
E.g.,
local $instance = $self;
$parser->handler(start => \_add_link, 'tagname,attr');
...
sub _add_link {
my $self = $instance;
...
This makes
_add_link a sort of spring-loaded method call.
Update: Forget this, and go with BrowserUk's suggestion below. Using a closure is a superior approach.
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