Function luaL_checkudata

ThirdParty/lua/lua/lauxlib.c:322–326

LUALIB_API void *luaL_checkudata (lua_State *L, int ud, const char *tname) {
  void *p = luaL_testudata(L, ud, tname);
  if (p == NULL) typeerror(L, ud, tname);
  return p;
}

/* }====================================================== */