Class: Wongi::Engine::BetaNode

Inherits:
Object
  • Object
show all
Includes:
CoreExt
Defined in:
lib/wongi-engine/beta/beta_node.rb

Defined Under Namespace

Modules: TokenContainer

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from CoreExt

included

Constructor Details

#initialize(parent = nil) ⇒ BetaNode

Returns a new instance of BetaNode.



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# File 'lib/wongi-engine/beta/beta_node.rb', line 33

def initialize parent = nil
  @parent = parent
  @children = []
  if parent
    parent.children << self
  end
end

Instance Attribute Details

#children ⇒ Object

Returns the value of attribute children.



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# File 'lib/wongi-engine/beta/beta_node.rb', line 30

def children
  @children
end

#parent ⇒ Object (readonly)

Returns the value of attribute parent.



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# File 'lib/wongi-engine/beta/beta_node.rb', line 29

def parent
  @parent
end

#rete ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 53

def rete
  @rete ||= if parent
    parent.rete
  end
end

Instance Method Details

#assignment_node(variable, body) ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 66

def assignment_node variable, body
  node = AssignmentNode.new self, variable, body
  node.refresh
  node
end

#delete_token(token) ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 80

def delete_token token
  # => noop
end

#depth ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 45

def depth
  @depth ||= if parent.nil?
    0
  else
    parent.depth + 1
  end
end

#refresh ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 72

def refresh
  parent.refresh_child self
end

#refresh_child(node) ⇒ Object 



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# File 'lib/wongi-engine/beta/beta_node.rb', line 76

def refresh_child node
  raise "#{self.class} must implement refresh_child"
end

#root? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/wongi-engine/beta/beta_node.rb', line 41

def root?
  parent.nil?
end