You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pack.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/ext/fiddle/lib/fiddle
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'fiddle'

module Fiddle
  module PackInfo # :nodoc: all
    ALIGN_MAP = {
      TYPE_VOIDP => ALIGN_VOIDP,
      TYPE_CHAR  => ALIGN_CHAR,
      TYPE
    
    def pack(ary)
      case SIZEOF_VOIDP
      when SIZEOF_LONG
        ary.pack(@template)
      else
        if defined?(TYPE_LONG_LONG) and
          SIZEOF_VOIDP == SIZEOF_LONG_LONG
          ary.pack(@template)
        else
          raise(RuntimeError, "sizeof(void*)?")
        end