13 Dec
2012
13 Dec
'12
10:20 a.m.
On Dec 12, 2012, at 12:30 PM, Gottlob Frege <gottlobfrege@gmail.com> wrote:
On Wed, Dec 12, 2012 at 10:49 AM, Rob Stewart <robertstewart@comcast.net>wrote:
std::string does not have a 'null' state.
It's the state represented by empty().
I am not sure it is so certainly accepted by all.
It is the logical interpretation. It indicates whether the string is non-empty. I don't see any other generally useful interpretation, do you?
Qt's QString has both empty() and isNull() and they are not always the same. Basically empty() is a zero-byte string, but null is a never-been-set-or-allocated string. [snip]
Somewhat like optional<string>.
That's how I'd spell it. ___ Rob