package
Subst ;
use Filter::Util::Call ;
use Carp ;
use strict ;
use warnings ;
sub filter
{
my ($self) = @_ ;
my ($status) ;
my ($from) = $self->[0] ;
my ($to) = $self->[1] ;
s/$from/$to/
if ($status = filter_read()) > 0 ;
$status ;
}
sub import
{
my ($self, @args) = @_ ;
croak("usage: use Subst qw(from to)")
unless @args == 2 ;
filter_add([ @args ]) ;
}
1 ;