C++11: devide vector into k-sized chunks

chanker.cc

/**
 * Code taken from http://stackoverflow.com/a/11408470/248823
 */

#include <vector>
#include <string>
#include <sstream>
#include <iterator>
#include <iostream>
#include <stdexcept>
#include <algorithm>

template <
        typename Container,
        typename OutIter,
        typename ChunkSepFunctor
>
OutIter chunker(
        Container const& c,
        typename Container::size_type const& k,
        OutIter o,
        ChunkSepFunctor sep
)
{
    using namespace std;

    if (k <= 0)
        throw domain_error("chunker() requires k > 0");

    auto chunkBeg = begin(c);
    for (auto left=c.size(); left != 0; )
    {
        auto const skip = min(left,k);

        o = copy_n(chunkBeg, skip, o);

        left -= skip;
        advance(chunkBeg, skip);

        if (left != 0)
            sep();
    }
    return o;
}

int main()
{
    using namespace std;

    using VECTOR = vector<string>;


    VECTOR v{"a","b","c","d","e"};


    for (VECTOR::size_type k = 1; k < 7; ++k)
    {
        cout << "\n\nk = " << k << "..." << endl;

        chunker(
                v, k,
                ostream_iterator<VECTOR::value_type>(cout),
                []() { cout << endl; }
        );
    }

    cout << endl;
}