Class: RLSM::RegExp::Star

Inherits:
Object show all
Defined in:
lib/rlsm_regexp.rb

Instance Method Summary collapse

Constructor Details

#initialize(parent, str) ⇒ Star

Returns a new instance of Star.



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# File 'lib/rlsm_regexp.rb', line 272

def initialize(parent, str)
  @parent = parent
  @child = NodeFactory.new_node(self, str[(0..-2)])
end

Instance Method Details

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rlsm_regexp.rb', line 314

def empty?
  false
end

#first ⇒ Object 



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# File 'lib/rlsm_regexp.rb', line 281

def first
  @child.first
end

#follow ⇒ Object 



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# File 'lib/rlsm_regexp.rb', line 289

def follow
  res = @child.follow

  #Cross of last and first
  first.each do |f|
    last.each do |l|
      res << [l,f]
    end
  end

  res
end

#lambda? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rlsm_regexp.rb', line 310

def lambda?
  false
end

#last ⇒ Object 



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# File 'lib/rlsm_regexp.rb', line 285

def last
  @child.last
end

#null? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rlsm_regexp.rb', line 277

def null?
  true
end

#to_s ⇒ Object 



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# File 'lib/rlsm_regexp.rb', line 302

def to_s
  if @child.class == PrimExp and @child.to_s.length == 1
    return "#{@child.to_s}*"
  else
    return "(#{@child.to_s})*"
  end
end