Unique 2D STL vector by row

C++

template <typename t>
std::vector<std::vector<t> > GetUniqueRows(std::vector<std::vector<t> > input)
{
    std::sort(input.begin(), input.end());
    input.erase(std::unique(input.begin(), input.end()), input.end());
    return input;
}

Works great for find unique edges, faces in a mesh.