Function typeerror

depends/lua/src/lauxlib.c:182–193

static int typeerror (lua_State *L, int arg, const char *tname) {
  const char *msg;
  const char *typearg;  /* name for the type of the actual argument */
  if (luaL_getmetafield(L, arg, "__name") == LUA_TSTRING)
    typearg = lua_tostring(L, -1);  /* use the given type name */
  else if (lua_type(L, arg) == LUA_TLIGHTUSERDATA)
    typearg = "light userdata";  /* special name for messages */
  else
    typearg = luaL_typename(L, arg);  /* standard name */
  msg = lua_pushfstring(L, "%s expected, got %s", tname, typearg);
  return luaL_argerror(L, arg, msg);
}


static void tag_error (lua_State *L, int arg, int tag) {