forked from HowardHinnant/date
Howard Hinnant
5eb10b747f
* Many of the ideas and some of the code herein is credited to Adrian Colomitchi * Decouple fractional decimal seconds formatting from time_of_day formatting so that it can be more easily used elsewhere in the future. * Include super-second durations such as nanocenturies and microfortnights in the class of durations that will get formatted with fractional decimal seconds. * If a duration is exactly representable with fractional decimal seconds not exceeding 18 decimal fractional digits, format it exactly. Otherwise format it to 6 fractional decimal digits (microseconds precision). The number 18 is chosen as this is the limit of std::ratio using 64 bits (i.e. atto). * The above bullet implies that durations with ratio<1, 4> will now be formatted with 2 fractional decimal digits instead of 1. ratio<1, 8> will be formatted with 3, and ratio<1, 3> with 6. * Unify the implementation into one C++11 implementation that works equally well with C++14. * Drive-by fix a couple formatting bugs dealing with negative durations. * Deprecate the make_time functions taking unsigned md by removing their documentation. Also deprecate the corresponding time_of_day constructors taking unsigned md. * This change paves the way for future formatting improvements.
