| Current Path : /proc/1553489/root/usr/share/doc/perl-Filter/examples/closure/ |
| Current File : //proc/1553489/root/usr/share/doc/perl-Filter/examples/closure/Subst.pm |
package
Subst ;
use Filter::Util::Call ;
use Carp ;
use strict ;
use warnings ;
sub import
{
croak("usage: use Subst qw(from to)")
unless @_ == 3 ;
my ($self, $from, $to) = @_ ;
filter_add(
sub
{
my ($status) ;
s/$from/$to/
if ($status = filter_read()) > 0 ;
$status ;
})
}
1 ;