8 Mar
2005
8 Mar
'05
9:34 p.m.
On Tue, 08 Mar 2005 15:42:36 -0500, David Abrahams <dave@boost-consulting.com> wrote:
"Gennadiy Rozental" <gennadiy.rozental@thomson.com> writes:
Agreed. I was going to say that an empty optional should print something, but couldn't articulate the reasons. Thanks.
Printing something only for empty optional may lead to unclear output. For example what should be an output of:
optional<string> v = "empty"; optional<string> v;
optional<bool> v = false; optional<bool> v;
optional<int> v = 0; optional<int> v;
Nothing. ;-)
Gennadiy
But seriously, folks, any output is confusible. Just pick a sufficiently unlikely placeholder string.
How about: () (empty) (false) (0) or something similar? Bruno