boost::log::formatters::time
// In header: <boost/log/formatters/date_time.hpp> template<typename AttributeValueTypesT, typename CharT, typename... ArgsT> fmt_date_time_facade< CharT, AttributeValueTypesT, implementation_defined, no_throw_policy > time(std::basic_string< CharT > const & name, ArgsT...const & args, std::nothrow_t const &);
Formatter generator with the explicitly specified set of supported types in the first template parameter. The formatter will not throw if the attribute value is not found in the record being formatted. Instead, no output will be produced for this attribute value.
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