Class: Code::Node::Negation

Inherits:
Code::Node show all
Defined in:
lib/code/node/negation.rb

Constant Summary collapse

EXCLAMATION_POINT = 
"!"
PLUS = 
"+"

Instance Method Summary collapse

Constructor Details

#initialize(negation) ⇒ Negation

Returns a new instance of Negation.



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# File 'lib/code/node/negation.rb', line 7

def initialize(negation)
  @operator = negation.fetch(:operator)
  @statement = ::Code::Node::Statement.new(negation.fetch(:statement))
end

Instance Method Details

#evaluate(**args) ⇒ Object 



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# File 'lib/code/node/negation.rb', line 12

def evaluate(**args)
  object = @statement.evaluate(**args)

  if operator == EXCLAMATION_POINT
    if object.truthy?
      ::Code::Object::Boolean.new(false)
    else
      ::Code::Object::Boolean.new(true)
    end
  elsif operator == PLUS
    object
  else
    raise NotImplementedError.new(operator)
  end
end