[RFC] libstdc++/8347

[Benjamin Kosnik]

>I think that most probably we can keep the best of both worlds: still 
>raise an exception if a zero pointer is passed to a constructor as in:
>
>    const char* bogus = 0;
>    std::string str1(bogus);
>
>but allow for a *couple* of zero pointers identifying a null range as in:
>
>     std::vector<char> empty;
>     std::string empty2(empty.begin(),empty.end());
>
>consistently with:
>
>     std::string empty;
>     std::string empty2(empty.begin(),empty.end());
>
>and the behaviour of *all* the other implementations I have access to.

Sounds great. Thanks!

-benjamin