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Function `std.datetime.interval.everyDayOfWeek`

Range-generating function.


						
				TP delegate(scope const TP) everyDayOfWeek(TP, Direction dir = Direction.fwd)
				(
				

				  DayOfWeek dayOfWeek
				

				) nothrow
				

				if (isTimePoint!TP && (dir == Direction.fwd || dir == Direction.bwd) && __traits(hasMember, TP, "dayOfWeek") && !__traits(isStaticFunction, TP.dayOfWeek) && is(typeof(TP.dayOfWeek) == DayOfWeek));

Returns a delegate which returns the next time point with the given DayOfWeek in a range.

Using this delegate allows iteration over successive time points which are all the same day of the week. e.g. passing DayOfWeek.mon to everyDayOfWeek would result in a delegate which could be used to iterate over all of the Mondays in a range.

Parameters

Name	Description
dir	The direction to iterate in. If passing the return value to `fwdRange`, use `Direction.fwd`. If passing it to `bwdRange`, use `Direction.bwd`.
dayOfWeek	The week that each time point in the range will be.

Example

import std.datetime.date : Date, DayOfWeek;

auto interval = Interval!Date(Date(2010, 9, 2), Date(2010, 9, 27));
auto func = everyDayOfWeek!Date(DayOfWeek.mon);
auto range = interval.fwdRange(func);

// A Thursday. Using PopFirst.yes would have made this Date(2010, 9, 6).
writeln(range.front); // Date(2010, 9, 2)

range.popFront();
writeln(range.front); // Date(2010, 9, 6)

range.popFront();
writeln(range.front); // Date(2010, 9, 13)

range.popFront();
writeln(range.front); // Date(2010, 9, 20)

range.popFront();
assert(range.empty);

Authors

Jonathan M Davis

License

Boost License 1.0.