Class: Rgviz::UnaryExpression

Inherits:
Object
  • Object
show all
Defined in:
lib/rgviz/nodes.rb

Constant Summary collapse

Not = 
Token::Not
IsNull = 
:'is null'
IsNotNull = 
:'is not null'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(operator, operand) ⇒ UnaryExpression

Returns a new instance of UnaryExpression.



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# File 'lib/rgviz/nodes.rb', line 281

def initialize(operator, operand)
  @operator = operator
  @operand = operand
end

Instance Attribute Details

#operand ⇒ Object

Returns the value of attribute operand.



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# File 'lib/rgviz/nodes.rb', line 278

def operand
  @operand
end

#operator ⇒ Object

Returns the value of attribute operator.



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# File 'lib/rgviz/nodes.rb', line 279

def operator
  @operator
end

Instance Method Details

#accept(visitor) ⇒ Object 



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# File 'lib/rgviz/nodes.rb', line 286

def accept(visitor)
  if visitor.visit_unary_expression(self)
    operand.accept visitor
  end
  visitor.end_visit_unary_expression self
end

#to_s ⇒ Object 



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# File 'lib/rgviz/nodes.rb', line 293

def to_s
  if operator == Not
    "not #{operand}"
  else
    "#{operand} #{operator}"
  end
end