In a boost::multi_array, which is the type of a sub-array?

Question

If I have a

boost::multi_array<int,2> myArray(boost::extents[10][10]);

Which type is the following?

myArray[4]

How should I define a reference to it in a function interface?

int doSomething(xxxxxx& mySubArray, const int dim) {
    for (int i = 0; i < dim; i++) {
         std::cout << mySubArray[i] << std::endl;
    }
}

Answer 1

From the documentation: boost::multi_array<int, 2>::reference.

For NumDims == 2, this is the type boost::multi_array<int, 2>::template subarray<1>::type, or alternately boost::array_view_gen<boost::multi_array<int, 2>, 1>::type. Once the dimensionality of the array view reaches 0, you get an element reference (i.e. int &) instead.