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9 changes: 5 additions & 4 deletions lib/Algorithm/AhoCorasick/SearchMachine.pm
Original file line number Diff line number Diff line change
Expand Up @@ -2,18 +2,19 @@ package Algorithm::AhoCorasick::SearchMachine;

use strict;
use warnings;
use Carp;

sub new {
my $class = shift;

if (!@_) {
die "no keywords";
croak "no keywords";
}

my %keywords;
foreach (@_) {
if (!defined($_) || ($_ eq '')) {
die "empty keyword";
croak "empty keyword";
}

$keywords{$_} = 1;
Expand Down Expand Up @@ -135,7 +136,7 @@ sub char {
my $self = shift;

if (!exists($self->{char})) {
die "root node has no character";
croak "root node has no character";
}

return $self->{char};
Expand All @@ -145,7 +146,7 @@ sub parent {
my $self = shift;

if (!exists($self->{parent})) {
die "root node has no parent";
croak "root node has no parent";
}

return $self->{parent};
Expand Down