The core.time.Duration to add to or subtract from this SysTime.
import core.time : hours, seconds; import std.datetime.date : DateTime; assert(SysTime(DateTime(2015, 12, 31, 23, 59, 59)) + seconds(1) == SysTime(DateTime(2016, 1, 1, 0, 0, 0))); assert(SysTime(DateTime(2015, 12, 31, 23, 59, 59)) + hours(1) == SysTime(DateTime(2016, 1, 1, 0, 59, 59))); assert(SysTime(DateTime(2016, 1, 1, 0, 0, 0)) - seconds(1) == SysTime(DateTime(2015, 12, 31, 23, 59, 59))); assert(SysTime(DateTime(2016, 1, 1, 0, 59, 59)) - hours(1) == SysTime(DateTime(2015, 12, 31, 23, 59, 59))); assert(SysTime(DateTime(2015, 12, 31, 23, 59, 59)) + seconds(1) == seconds(1) + SysTime(DateTime(2015, 12, 31, 23, 59, 59)));
Gives the result of adding or subtracting a core.time.Duration from this SysTime.
The legal types of arithmetic for SysTime using this operator are