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: operands_unifications.rb
    path of file: ./repos/ruby-packer/ruby/tool/ruby_vm/models
    
    the code of the file until where you have to start completion: #! /your/favourite/path/to/ruby
# -*- Ruby -*-
# -*- frozen_string_literal: true; -*-
# -*- warn_indent: true; -*-
#
# Copyright (c) 2017 Urabe, Shyouhei.  All rights reserved.
#
# This file is  a part of the programming language  Ruby.  Permission is hereby
# granted, to  either redistribute and/or  modify this file, provided  that the
# conditions  mentioned in  the file  COPYING are  met.  Consult  the file  for
# details.

require_relative '../helpers/c_escape'
require_relative '../loaders/opt_operand_def'
require_relative 'bare_
    
  def compose location, spec, template
    name    = namegen spec
    *, argv = *spec
    opes    = @original.opes
    if opes.size != argv.size
      raise sprintf("operand size mismatch for %s (%s's: %d, given: %d)",
                    name, template[:name], opes.size, argv.size)
    else
      src  = []
      mod  = []
      spec = []
      vars = []
      argv.each_index do |i|
        j = argv[i]
        k = opes[i]
        spec[i] = [k, j]
        case j when '*' then
          # operand is from iseq
          mod << k[:decl]
        else
          # operand is inside C
          vars << k
          src << {
            location: location,
            expr: "    const #{k[:decl]} = #{j};"
          }
        end
      end