Module: Plexus::ArcNumber

Included in:
MultiArc, MultiEdge
Defined in:
lib/plexus/arc_number.rb

Overview

This module handles internal numbering of edges in order to differente between mutliple edges.

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#number ⇒ Object

Used to differentiate between mutli-edges



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# File 'lib/plexus/arc_number.rb', line 5

def number
  @number
end

Class Method Details

.included(cl) ⇒ Object

Shortcut constructor. Instead of Arc.new(1,2) one can use Arc



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# File 'lib/plexus/arc_number.rb', line 43

def self.included(cl)
  # FIXME: lacks a cl.class_eval, no?
  def cl.[](p_source, p_target, p_number = nil, p_label = nil)
    new(p_source, p_target, p_number, p_label)
  end
end

Instance Method Details

#<=>(rhs) ⇒ Object 



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# File 'lib/plexus/arc_number.rb', line 26

def <=>(rhs)
  (result = super(rhs)) == 0 ? number <=> rhs.number : result
end

#==(rhs) ⇒ Object 



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# File 'lib/plexus/arc_number.rb', line 38

def ==(rhs)
  eql?(rhs)
end

#eql?(rhs) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/plexus/arc_number.rb', line 34

def eql?(rhs)
  super(rhs) and (rhs.number.nil? or number.nil? or number == rhs.number)
end

#hash ⇒ Object

Allow for hashing of self loops.



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# File 'lib/plexus/arc_number.rb', line 18

def hash
  super ^ number.hash
end

#initialize(p_source, p_target, p_number, p_label = nil) ⇒ Object 



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# File 'lib/plexus/arc_number.rb', line 7

def initialize(p_source, p_target, p_number, p_label = nil)
  self.number = p_number
  super(p_source, p_target, p_label)
end

#inspect ⇒ Object 



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# File 'lib/plexus/arc_number.rb', line 30

def inspect
  "#{self.class.to_s}[#{source.inspect},#{target.inspect},#{number.inspect},#{label.inspect}]"
end

#reverse ⇒ Object

Returns (v,u) if self == (u,v).



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# File 'lib/plexus/arc_number.rb', line 13

def reverse
  self.class.new(target, source, number, label)
end

#to_s ⇒ Object 



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# File 'lib/plexus/arc_number.rb', line 22

def to_s
  super + "[#{number}]"
end