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version 2.109.1

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std.datetime.interval.PosInfInterval.expand - multiple declarations

Function PosInfInterval.expand

Expands the interval forwards and/or backwards in time. Effectively, it subtracts the given number of months/years from begin.

void expand(T) (
  T years,
  T months = 0,
  AllowDayOverflow allowOverflow = AllowDayOverflow.yes
)
if (isIntegral!T);

Parameters

NameDescription
years The number of years to expand the interval by.
months The number of months to expand the interval by.
allowOverflow Whether the days should be allowed to overflow on begin, causing its month to increment.

Throws

DateTimeException if this interval is empty or if the resulting interval would be invalid.

Example

auto interval1 = PosInfInterval!Date(Date(1996, 1, 2));
auto interval2 = PosInfInterval!Date(Date(1996, 1, 2));

interval1.expand(2);
assert(interval1 == PosInfInterval!Date(Date(1994, 1, 2)));

interval2.expand(-2);
assert(interval2 == PosInfInterval!Date(Date(1998, 1, 2)));

Function PosInfInterval.expand

Expands the interval backwards in time. Effectively, it does begin -= duration.

void expand(D) (
  D duration
) pure nothrow
if (__traits(compiles, begin + duration));

Parameters

NameDescription
duration The duration to expand the interval by.

Example

auto interval1 = PosInfInterval!Date(Date(1996, 1, 2));
auto interval2 = PosInfInterval!Date(Date(1996, 1, 2));

interval1.expand(dur!"days"(2));
assert(interval1 == PosInfInterval!Date(Date(1995, 12, 31)));

interval2.expand(dur!"days"(-2));
assert(interval2 == PosInfInterval!Date(Date(1996, 1, 4)));

Authors

Jonathan M Davis

License

Boost License 1.0.