Class: KPeg::CharRange

Inherits:
Operator show all
Defined in:
lib/kpeg/grammar.rb

Instance Attribute Summary collapse

Attributes inherited from Operator

#action

Instance Method Summary collapse

Methods inherited from Operator

#detect_tags, #inspect_type, #prune_values, #set_action, #|

Constructor Details

#initialize(start, fin) ⇒ CharRange

Returns a new instance of CharRange.



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# File 'lib/kpeg/grammar.rb', line 168

def initialize(start, fin)
  super()
  @start = start
  @fin = fin
  @regexp = Regexp.new "[#{Regexp.quote start}-#{Regexp.quote fin}]"
end

Instance Attribute Details

#fin ⇒ Object (readonly)

Returns the value of attribute fin.



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# File 'lib/kpeg/grammar.rb', line 175

def fin
  @fin
end

#start ⇒ Object (readonly)

Returns the value of attribute start.



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# File 'lib/kpeg/grammar.rb', line 175

def start
  @start
end

Instance Method Details

#==(obj) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 189

def ==(obj)
  case obj
  when CharRange
    @start == obj.start and @fin == obj.fin
  else
    super
  end
end

#inspect ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 198

def inspect
  inspect_type 'range', "#{@start}-#{@fin}"
end

#match(x) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 181

def match(x)
  if str = x.scan(@regexp)
    MatchString.new(self, str)
  else
    x.fail(self)
  end
end

#string ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 177

def string
  @regexp.source
end