tuple.rb

# frozen_string_literal: true

module RuboCop
  module AST
    # A frozen Array/Set
    #
    class Tuple < ::Array
      extend Forwardable
      attr_reader :to_set

      def initialize(ary)
        raise ArgumentError, 'Must be initialized with an array' unless ary.is_a?(Array)

        super
        freeze
      end

      def self.[](*values)
        new(values)
      end

      def freeze
        @to_set = Set.new(self).freeze
        super
      end

      def to_a
        self
      end

      def_delegators :@to_set, :include?, :===
    end
  end
end

def Tuple(list) # rubocop:disable Naming/MethodName
  RuboCop::AST::Tuple.new(list)
end