Class: KPeg::Sequence

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(*ops) ⇒ Sequence

Returns a new instance of Sequence.



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# File 'lib/kpeg/grammar.rb', line 303

def initialize(*ops)
  super()
  @ops = ops
  detect_tags ops
end

Instance Attribute Details

#ops ⇒ Object (readonly)

Returns the value of attribute ops.



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# File 'lib/kpeg/grammar.rb', line 309

def ops
  @ops
end

Instance Method Details

#==(obj) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 324

def ==(obj)
  case obj
  when Sequence
    @ops == obj.ops
  else
    super
  end
end

#inspect ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 333

def inspect
  inspect_type "seq", @ops.map { |i| i.inspect }.join(' ')
end

#match(x) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 311

def match(x)
  start = x.pos
  matches = @ops.map do |n|
    m = n.match(x)
    unless m
      x.pos = start
      return nil
    end
    m
  end
  MatchComposition.new(self, matches)
end