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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 ;
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