-- automatically generated by luaffi 0.1.0
local table, string, math, coroutine, package, debug, jit, bit, ffi, new, clear =
  table,
  string,
  math,
  coroutine,
  package,
  debug,
  jit,
  require("bit"),
  require("ffi"),
  require("table.new"),
  require("table.clear")
local assert, error, type, print, pcall, xpcall, getfenv, setfenv, getmetatable, setmetatable, pairs, ipairs, next, rawget, rawset, rawequal, select, tonumber, tostring, require, concat, insert, maxn, remove, sort, strlen, format, strsub, gsub, gmatch, dump, random, yield, traceback, C, cdef, typeof, metatype, cast, gc, tobit, tohex, bnot, band, bor, bxor, lshift, rshift, arshift, rol, ror, bswap =
  assert,
  error,
  type,
  print,
  pcall,
  xpcall,
  getfenv,
  setfenv,
  getmetatable,
  setmetatable,
  pairs,
  ipairs,
  next,
  rawget,
  rawset,
  rawequal,
  select,
  tonumber,
  tostring,
  require,
  table.concat,
  table.insert,
  table.maxn,
  table.remove,
  table.sort,
  string.len,
  string.format,
  string.sub,
  string.gsub,
  string.gmatch,
  string.dump,
  math.random,
  coroutine.yield,
  debug.traceback,
  ffi.C,
  ffi.cdef,
  ffi.typeof,
  ffi.metatype,
  ffi.cast,
  ffi.gc,
  bit.tobit,
  bit.tohex,
  bit.bnot,
  bit.band,
  bit.bor,
  bit.bxor,
  bit.lshift,
  bit.rshift,
  bit.arshift,
  bit.rol,
  bit.ror,
  bit.bswap
cdef([[void (*luaffi_keep)(void const *);
bool (*luaffi_is_utf8)(uint8_t const *, uintptr_t );
struct Test  { } __attribute__((aligned(1)));
struct lua_buf  { uint8_t *__ptr; uintptr_t __len; } __attribute__((aligned(8)));
struct option__lua_buf  { int32_t __tag; struct lua_buf __value; } __attribute__((aligned(8)));
struct option__uint32_t  { int32_t __tag; uint32_t __value; } __attribute__((aligned(4)));
struct option__void  { int32_t __tag; void __value; } __attribute__((aligned(4)));
]])
local Test = typeof("struct Test ")
local lua_buf = typeof("struct lua_buf ")
do
  local __mt, __idx = {}, {}
  __mt.__index = __idx
  metatype(lua_buf, __mt)
end
local option__lua_buf = typeof("struct option__lua_buf ")
local option__uint32_t = typeof("struct option__uint32_t ")
local option__void = typeof("struct option__void ")
do
  local __mt, __idx = {}, {}
  __mt.__index = __idx
  __idx.method = function(my_arg, other)
    local __keep_my_arg = my_arg
    if my_arg == nil then
      my_arg = option__lua_buf()
    else
      assert(type(my_arg) == "string", "expected string in argument 'my_arg', got " .. type(my_arg))
      assert(C.luaffi_is_utf8(my_arg, #my_arg), "argument 'my_arg' must be a valid utf8 string")
      my_arg = lua_buf(my_arg, #my_arg)
      my_arg = option__lua_buf(1, my_arg)
    end
    if other == nil then
      other = option__uint32_t()
    else
      assert(type(other) == "number", "expected number in argument 'other', got " .. type(other))
      other = option__uint32_t(1, other)
    end
    local res = C.test_fn_impl(my_arg, other)
    if res.__tag == 0 then
      res = nil
    else
      res = res.__value
    end
    C.luaffi_keep(__keep_my_arg)
    return res
  end
  metatype(Test, __mt)
end