Class: KPeg::Choice

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(*many) ⇒ Choice

Returns a new instance of Choice.



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# File 'lib/kpeg/grammar.rb', line 204

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

Instance Attribute Details

#ops ⇒ Object (readonly)

Returns the value of attribute ops.



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# File 'lib/kpeg/grammar.rb', line 209

def ops
  @ops
end

Instance Method Details

#==(obj) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 230

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

#inspect ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 239

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

#match(x) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 216

def match(x)
  pos = x.pos

  @ops.each do |c|
    if m = c.match(x)
      return m
    end

    x.pos = pos
  end

  return nil
end

#|(other) ⇒ Object 



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# File 'lib/kpeg/grammar.rb', line 211

def |(other)
  @ops << Grammar.resolve(other)
  self
end