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package AI::Prolog::TermList::Clause; |
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3
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$REVISION = '$Id: Clause.pm,v 1.4 2005/08/06 23:28:40 ovid Exp $'; |
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$VERSION = '0.1'; |
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6
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13
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13
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29872
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use strict; |
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29
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13
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424
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7
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13
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13
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62
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use warnings; |
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13
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24
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13
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399
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8
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13
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13
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66
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use base 'AI::Prolog::TermList'; |
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19
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13
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4228
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9
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10
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sub new { |
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12
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# Term TermList |
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792
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792
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0
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1021
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my $class = shift; |
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792
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2548
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return $class->SUPER::new(@_); |
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} |
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17
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sub to_string { |
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3
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3
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0
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32
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my $self = shift; |
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3
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16
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my ( $term, $next ) = ( $self->term, $self->next ); |
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3
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8
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foreach ( $term, $next ) { |
21
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6
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100
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30
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$_ = $_ ? $_->to_string : "null"; |
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} |
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3
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32
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return sprintf "%s :- %s" => $term, $next; |
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} |
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26
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sub is_builtin { |
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369
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369
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0
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454
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my $self = shift; |
28
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369
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50
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763
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if (@_) { |
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369
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569
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$self->{is_builtin} = shift; |
30
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369
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729
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return $self; |
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} |
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0
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return $self->{is_builtin}; |
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} |
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35
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1; |
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37
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__END__ |