[Boost-users] [icl] How to find whether a single day intersects a set of intervals?

Subject: [Boost-users] [icl] How to find whether a single day intersects a set of intervals?
From: Steve Lorimer (steve.lorimer_at_[hidden])
Date: 2012-08-20 03:53:43

*Hi folks*
*
*
*I have the following use case: I want to store a series of time intervals
in an icl::interval_set and then determine whether a single point in time
intersects one of these intervals.*
*
*
*Here is my first stab at this:
*

        icl::interval_set<Time> _badMonths; // Time is an internal class
which defines all comparison operators

        std::vector<int> badMonths; // populated with YYMM integers (eg:
1206 for June 2012)

        for (int m : badMonths)
        {
            Time openInterval  = Time(2000 + m / 100, m % 100,     1);
                // 1st day of the month
            Time closeInterval = Time(2000 + m / 100, m % 100 + 1, 1) -
TimeSpan::Days(1); // last day of the month

            icl::interval<Time>::type month(openInterval, closeInterval);

            _badMonths.insert(month);
        }

        // it is now my hope that _badMonths will contain a set of
intervals where each interval is a month

*How do I now check whether a single Time instance  intersects  one of the
intervals in the set? *

        Time timepoint;
        if (_badMonths &=  timepoint)
            std::cout <<  timepoint  << " intersects bad months" <<
std::endl;

TIA
Steve