sequenceofpairscompare.h

来自「C++封装的视频采集代码」· C头文件 代码 · 共 41 行

#ifndef SEQUENCE_OF_PAIRS_COMPARE_H
#define SEQUENCE_OF_PAIRS_COMPARE_H

namespace oxsemi
{
    template <class T>
    class SequenceOfPairsCompare
    {
    public:
        /** Comparison function for sorting */
        bool operator()(const T& lhs,
                        const T& rhs) const
        {
            return keyLess(lhs.first, rhs.first);
        }

        /** Comparison function for lookups, first form */
        bool operator()(const T& lhs,
                        const typename T::first_type& k) const
        {
            return keyLess(lhs.first, k);
        }

        /** Comparison function for lookups, second form */
        bool operator()(const typename T::first_type& k,
                        const T& rhs) const
        {
            return keyLess(k, rhs.first);
        }

    private:
        bool keyLess(const typename T::first_type& k1,
                     const typename T::first_type& k2) const
        {
            return k1 < k2;
        }
    };
}
#endif