Class: KPeg::NotPredicate

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(op) ⇒ NotPredicate

Returns a new instance of NotPredicate.



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# File 'lib/kpeg/grammar.rb', line 362

def initialize(op)
  super()
  @op = op
end

Instance Attribute Details

#op ⇒ Object (readonly)

Returns the value of attribute op.



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# File 'lib/kpeg/grammar.rb', line 367

def op
  @op
end

Instance Method Details

#==(obj) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 377

def ==(obj)
  case obj
  when NotPredicate
    @op == obj.op
  else
    super
  end
end

#inspect ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 386

def inspect
  inspect_type "notp", @op.inspect
end

#match(x) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 369

def match(x)
  pos = x.pos
  m = @op.match(x)
  x.pos = pos

  return m ? nil : MatchString.new(self, "")
end