Function erase_iterator

test/algorithm.cpp:42–48

template <class Container, class Iterator>
static auto
erase_iterator(Container& c, Iterator pos, Iterator last) -> decltype(c.erase_after(pos, last))
{
    auto n  = std::distance(c.begin(), pos);
    auto it = n == 0 ? c.before_begin() : std::next(c.begin(), n - 1);
    return c.erase_after(it, last);
}

template <class Container, class Iterator>
static auto erase_iterator(Container& c, Iterator pos, Iterator last) -> decltype(c.erase(pos,