Re: [boost] [c++TR2] N3334, Proposing array_ref<T> and string_ref

On Tue, Jan 31, 2012 at 7:57 PM, Yakov Galka <ybungalobill@gmail.com> wrote:

b) Add *one* implicit constructor to array_ref:

template<class R> array_ref(const R& x,        typename enable_if<                is_base_of<                        contiguous_iterator_tag,                        typename iterator_traits<                                decltype(begin(x))                        >::iterator_category                >::value,                int        >::type = 0); // use &*begin(x), (end(x) - begin(x)) to initialize.

You should check whether the range is empty before dereferencing begin(). Olaf