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  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
      * Redistributions of source code must retain the above copyright
        notice, this list of conditions and the following disclaimer.
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        notice, this list of conditions and the following disclaimer in the
        documentation and/or other materials provided with the distribution.
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        names of its contributors may be used to endorse or promote products
        derived from this software without specific prior written permission.

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  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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--]]--------------------------------------------------------------------------

local upb = require("lupb")

upb.generated_pool = upb.SymbolTable()

local module_metatable = {
  __index = function(t, k)
    local package = t._filedef:package()
    if package then
      k = package .. "." .. k
    end
    local pool = upb.generated_pool
    local def = pool:lookup_msg(k) or pool:lookup_enum(k)
    local v = nil
    if def and def:file():name() == t._filedef:name() then
      v = def
      t[k] = v
    end
    return v
  end
}

function upb._generated_module(desc_string)
  local file = upb.generated_pool:add_file(desc_string)
  local module = {_filedef = file}
  setmetatable(module, module_metatable)
  return module
end

return upb
