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Editing: NewSubst.pm
package NewSubst ; use Filter::Util::Call ; use Carp ; use strict ; use warnings ; sub filter { my ($self) = @_ ; my ($status) ; if (($status = filter_read()) > 0) { $self->{Found} = 1 if $self->{Found} == 0 and /$self->{Start}/ ; if ($self->{Found}) { s/$self->{From}/$self->{To}/ ; filter_del() if /$self->{Stop}/ ; } } $status ; } sub import { my ($self, @args) = @_ ; croak("usage: use Subst qw(start stop from to)") unless @args == 4 ; filter_add( { Start => $args[0], Stop => $args[1], From => $args[2], To => $args[3], Found => 0 } ) ; } 1 ;
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