Class: KPeg::Choice

Inherits:

Rule

• Object
• Rule
• KPeg::Choice

show all

Defined in:

lib/vendor/kpeg/lib/kpeg.rb

Instance Attribute Summary (collapse)

• - (Object) rules readonly

  Returns the value of attribute rules.

Attributes inherited from Rule

#action, #name

Instance Method Summary (collapse)

• - (Object) ==(obj)
• - (Choice) initialize(*many) constructor

  A new instance of Choice.

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

Methods inherited from Rule

#detect_tags, #inspect_type, #prune_values, #set_action

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# File 'lib/vendor/kpeg/lib/kpeg.rb', line 420

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

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# File 'lib/vendor/kpeg/lib/kpeg.rb', line 425

def rules
  @rules
end

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# File 'lib/vendor/kpeg/lib/kpeg.rb', line 446

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

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# File 'lib/vendor/kpeg/lib/kpeg.rb', line 455

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

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# File 'lib/vendor/kpeg/lib/kpeg.rb', line 432

def match(x)
  pos = x.pos

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

    x.pos = pos
  end

  return nil
end

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# File 'lib/vendor/kpeg/lib/kpeg.rb', line 427

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