Function savArg

common/script/checkpoint_api.cpp:95–102

An open save-archive handle: a stale one (closed, or from a previous run) is as much a script bug as an out-of-range index.

    // An open save-archive handle: a stale one (closed, or from a previous run)
    // is as much a script bug as an out-of-range index.
    int savArg(const ScriptArgs& args, int i)
    {
        const int handle = args.num(i);
        if (!host().savValid(handle)) {
            args.fail("argument %d is %d, not an open save handle", i + 1, handle);
        }
        return handle;
    }

    std::string idToHex(uint64_t id)
    {