Class: Cadenza::BooleanInverseNode

Inherits:

Object

• Object
• Cadenza::BooleanInverseNode

Defined in:

lib/cadenza/nodes/boolean_inverse_node.rb

Overview

The BooleanInverseNode takes an expression and evaluates the logical inverse of that expression so any expression that evaluates to true will return false and vice versa.

Instance Attribute Summary

• #expression ⇒ OperationNode

  An evaluatable expression node.

Instance Method Summary

• #==(rhs) ⇒ Boolean

  If the given BooleanInverseNode is equivalent by value.

• #eval(context) ⇒ Object

  The value of this node evaluated with the data in the given Context.

• #initialize(expression) ⇒ BooleanInverseNode constructor

  creates a new BooleanInverseNode with the given expression.

Constructor Details

#initialize(expression) ⇒ BooleanInverseNode

creates a new Cadenza::BooleanInverseNode with the given expression

Parameters:

• the (OperationNode) —

  node this one will invert

# File 'lib/cadenza/nodes/boolean_inverse_node.rb', line 11

def initialize(expression)
   @expression = expression
end

Instance Attribute Details

#expression ⇒ OperationNode

Returns an evaluatable expression node.

Returns:

• (OperationNode) —

  an evaluatable expression node

# File 'lib/cadenza/nodes/boolean_inverse_node.rb', line 7

def expression
  @expression
end

Instance Method Details

#==(rhs) ⇒ Boolean

Returns if the given Cadenza::BooleanInverseNode is equivalent by value.

Parameters:

• rhs (BooleanInverseNode)

Returns:

• (Boolean) —

  if the given Cadenza::BooleanInverseNode is equivalent by value

# File 'lib/cadenza/nodes/boolean_inverse_node.rb', line 17

def ==(rhs)
   @expression == rhs.expression
end

#eval(context) ⇒ Object

Returns the value of this node evaluated with the data in the given Context.

Parameters:

• context (Context)

Returns:

• the value of this node evaluated with the data in the given Context

# File 'lib/cadenza/nodes/boolean_inverse_node.rb', line 23

def eval(context)
   #TODO: rename me to .evaluate
   !@expression.eval(context)
end