Class: KPeg::NotPredicate

Inherits:

Operator

• Object
• Operator
• KPeg::NotPredicate

show all

Defined in:

lib/kpeg/grammar.rb

Instance Attribute Summary (collapse)

• - (Object) op readonly

  Returns the value of attribute op.

Attributes inherited from Operator

#action

Instance Method Summary (collapse)

• - (Object) ==(obj)
• - (NotPredicate) initialize(op) constructor

  A new instance of NotPredicate.

• - (Object) inspect
• - (Object) match(x)

Methods inherited from Operator

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

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

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

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

def op
  @op
end

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

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

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

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

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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