Formatting TimeStamp

[lijh8]

    auto format = expr::stream
        << expr::attr<boost::posix_time::ptime>("TimeStamp")
        << " [" << std::left << std::setw(7) << std::setfill(' ') << logging::trivial::severity << "] "
        << expr::smessage;

    sink->set_formatter(format);

// 2023-Jul-02 14:08:54.877281 

The code generates data time with month part in abbr letters.

I added two more lines to get data time in all digit format.
It allocates memory manually but asan does not warn on it.

    auto *facet = new boost::posix_time::time_facet("%Y%m%d %H%M%S");
    std::locale::global(std::locale(std::locale(), facet));

// 2023-07-02 14:08:54

Is there a better way to do it?

Thanks

[Lastique]

Depends on what you actually need. Here are a couple alternatives:

1. Setting the global locale is fine, but in case if you want to only set the locale for a given sink, you can call imbue on the sink frontend.
2. You can avoid creating the locale altogether by using a dedicated formatter for dates and time. It will work slightly more efficiently than the locale.