Return the (signed fractional) number of years between the specified beginDate and endDate according to the specified day‐count convention. If beginDate <= endDate then the result is non‐negative. The behavior is undefined unless isSupported(convention). Note that reversing the order of beginDate and endDate negates the result; specifically, |yearsDiff(b, e, c) + yearsDiff(e, b, c)| <= 1.0e‐15 for all dates b and e, and day‐count conventions c.

Synopsis

Declared in <bbldc_basicdaycountutil.h>

static
double
yearsDiff(
    bdlt::Date const& beginDate,
    bdlt::Date const& endDate,
    DayCountConvention::Enum convention);

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