I would actually organize that slightly differently: 
package Err;

sub new {
    return bless {}, shift;
}

sub err {
    my $self = shift;
    my %args = @_;
    # Do something with %args here
}

[download]
And then in other code you would do this: 
$handler ||= new Err;
# time passes
&do_right_thing() or $handler->err(title=>'Oops',msg=>'something went 
+wrong');

[download]

In reply to RE (tilly) 2: Handling cascading defaults by tilly
in thread Handling cascading defaults by markjugg

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