13 Dec
2012
13 Dec
'12
5:05 p.m.
On Thu, Dec 13, 2012 at 5:20 AM, Rob Stewart <robertstewart@comcast.net>wrote:
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.
Me too maybe. But either way, there is another 'generally useful interpretation'. And fairly well known. For string_ref, it could mean the difference between these 2 string_refs, assuming a ptr+size implementation: { ptr != 0, size == 0 } and { ptr == 0, size == hopefully_zero }