Method string pluto_optstring

src/lauxlib.cpp:452–456

PLUTOLIB_API std::string pluto_optstring (lua_State *L, int arg, std::string def) {
  if (lua_isnoneornil(L, arg))
    return def;
  return pluto_checkstring(L, arg);
}


LUALIB_API lua_Number luaL_checknumber (lua_State *L, int arg) {