interval.h

// Description: Real interval

#ifndef PASTELSYS_INTERVAL_H
#define PASTELSYS_INTERVAL_H

#include "pastel/sys/real/real_concept.h"

namespace Pastel
{

    //! A real interval.

    template <typename Real>
    class Interval
    {
    public:
        // Using default copy constructor.
        // Using default assignment.
        // Using default destructor.

        //! Constructs [oo, -oo]
        Interval()
        : min_((Real)Infinity())
        , max_(-(Real)Infinity())
        {
        }

        //! Constructs [min, max]
        Interval(
            const Real& min,
            const Real& max)
        : min_(min)
        , max_(max)
        {
        }

        //! Swaps two intervals.
        void swap(Interval& that)
        {
            using std::swap;

            swap(min_, that.min_);
            swap(max_, that.max_);
        }

        //! Sets the interval to [min, max].
        void set(const Real& min, const Real& max)
        {
            min_ = min;
            max_ = max;
        }

        //! Returns the minimum of the interval.
        Real& min()
        {
            return min_;
        }

        //! Returns the minimum of the interval.
        const Real& min() const
        {
            return min_;
        }

        //! Returns the maximum of the interval.
        Real& max()
        {
            return max_;
        }

        //! Returns the maximum of the interval.
        const Real& max() const
        {
            return max_;
        }

    private:
        Real min_;
        Real max_;
    };

}

#endif