operator - method
- Duration duration
Subtracts duration
from this date.
Note that the curation is subtracted as a value in seconds. Thus,
subtracting a Duration(days: 1)
will not necessary yield the same time
yesterday in all cases (due to daylight saving time switches). To change
the value in terms of calendar units, see modify.
Implementation
Expression<DateTime> operator -(Duration duration) {
return _DependingOnDateTimeExpression(
// Date times are integers (unix timestamps), so we can do arithmetic on
// them directly.
forTimestamps: BaseInfixOperator(
this, '-', Variable<int>(duration.inSeconds),
precedence: Precedence.plusMinus),
forIsoString:
modify(DateTimeModifier.seconds(-duration.inMilliseconds / 1000)),
);
}