present.h File Reference

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Macros
#define	present_delta(value, unit)   present_delta_constructor_unit_ ## unit (value)
	Shortcut macro to create an instance of a Present delta type, based on a numeric value and a unit. More...

Macro Definition Documentation

#define present_delta	(		value,
			unit
	)		present_delta_constructor_unit_ ## unit (value)

Shortcut macro to create an instance of a Present delta type, based on a numeric value and a unit.

Possible units and their returned types:

• year, years, yr, yrs: MonthDelta
• month, months: MonthDelta
• week, weeks: DayDelta
• day, days: DayDelta
• week_time, weeks_time: TimeDelta
• day_time, days_time: TimeDelta
• hour, hours, hr, hrs: TimeDelta
• minute, minutes, min, mins: TimeDelta
• second, seconds, sec, secs: TimeDelta
• millisecond, milliseconds, ms: TimeDelta
• microsecond, microseconds, us: TimeDelta
• nanosecond, nanoseconds, ns: TimeDelta

Note that day and week return a DayDelta, not a TimeDelta. If you need a TimeDelta instead in one of these situations, you need to use day_time and week_time.

Examples:

MonthDelta d = present_delta(6, months);
DayDelta   d = present_delta(-10, days);
TimeDelta  d = present_delta(4, weeks_time);
TimeDelta  d = present_delta(1, second);