Struct core.time.Duration

It is used when representing a duration of time - such as how long to sleep with core.thread.Thread.sleep.

In std.datetime, it is also used as the result of various arithmetic operations on time points.

Use the dur function or one of its non-generic aliases to create Durations.

It's not possible to create a Duration of months or years, because the variable number of days in a month or year makes it impossible to convert between months or years and smaller units without a specific date. So, nothing uses Durations when dealing with months or years. Rather, functions specific to months and years are defined. For instance, std.datetime.Date has add!"years" and add!"months" for adding years and months rather than creating a Duration of years or months and adding that to a std.datetime.Date. But Duration is used when dealing with weeks or smaller.

Properties

Methods

Templates

Examples

assert(dur!"days"(12) == dur!"hnsecs"(10_368_000_000_000L));
assert(dur!"hnsecs"(27) == dur!"hnsecs"(27));
assert(std.datetime.Date(2010, 9, 7) + dur!"days"(5) ==
       std.datetime.Date(2010, 9, 12));

assert(days(-12) == dur!"hnsecs"(-10_368_000_000_000L));
assert(hnsecs(-27) == dur!"hnsecs"(-27));
assert(std.datetime.Date(2010, 9, 7) - std.datetime.Date(2010, 10, 3) ==
       days(-26));

Example

import core.time;

// using the dur template
auto numDays = dur!"days"(12);

// using the days function
numDays = days(12);

// alternatively using UFCS syntax
numDays = 12.days;

auto myTime = 100.msecs + 20_000.usecs + 30_000.hnsecs;
assert(myTime == 123.msecs);