pairwise_all_of.h

// Description: Pairwise all-of
// Documentation: sequence_algorithms.txt

#ifndef PASTELSYS_PAIRWISE_ALL_OF
#define PASTELSYS_PAIRWISE_ALL_OF

#include "pastel/sys/predicate/predicate_concept.h"

namespace Pastel
{

    template <
        typename ForwardIterator,
        typename Predicate>
    bool pairwiseAllOf(
        const ranges::subrange<ForwardIterator>& range,
        const Predicate& predicate)
    {
        if (range.empty())
        {
            return true;
        }

        ForwardIterator iter = range.begin();
        ForwardIterator end = range.end();
        ForwardIterator next = std::next(iter);
        while(next != end)
        {
            if (!predicate(*iter, *next))
            {
                return false;
            }

            iter = next;
            ++next;
        }

        return true;
    }

}

#endif