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package Dallycot::AST::Invert; |
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our $AUTHORITY = 'cpan:JSMITH'; |
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# ABSTRACT: Invert the truth of an expression or value |
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12157
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use strict; |
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use warnings; |
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use utf8; |
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use parent 'Dallycot::AST'; |
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sub new { |
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my ( $class, $expr ) = @_; |
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$class = ref $class || $class; |
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return bless [$expr] => $class; |
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} |
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sub to_rdf { |
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my($self, $model) = @_; |
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return $model -> apply( |
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$model -> meta_uri('loc:invert'), |
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[ $self->[0] ], |
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{} |
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); |
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} |
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sub execute { |
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my ( $self, $engine ) = @_; |
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return $engine->execute( $self->[0] )->then( |
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sub { |
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my ($res) = @_; |
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if ( $res->isa('Dallycot::Value::Boolean') ) { |
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return Dallycot::Value::Boolean->new( !$res->value ); |
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} |
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elsif ( $res->isa('Dallycot::Value::Lambda') ) { |
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return Dallycot::Value::Lambda->new( |
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expression => Dallycot::AST::Invert->new( $res->[0] ), |
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bindings => $res->[1], |
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bindings_with_defaults => $res->[2], |
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options => $res->[3], |
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closure_environment => $res->[4], |
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closure_namespaces => $res->[5] |
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); |
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} |
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else { |
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return Dallycot::Value::Boolean->new( !$res->is_defined ); |
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} |
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} |
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0
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); |
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} |
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1; |