From: Johan Nilsson (r.johan.nilsson_at_[hidden])
Date: 2006-09-26 03:15:16
Jeff Garland wrote:
> Johan Nilsson wrote:
>> Hi,
>>
>> is there any way to force ptime stream input fail when the time
>> duration part is not between 00:00:00 and 23:59:59?
>>
[snip]
>
> Since these are treated as a time_duration for i/o there isn't a
> switch in the library to do this. I think the easiest way to do this
> would be to break down the streaming into it's parts and check in
> your client code. Here's the sketch if how it can be trivially done:
>
> ptime getTime(istream& is)
> {
> //assuming formatting is already set...
> date d;
> time_duration td;
> is >> d;
> is >> td;
> if (td > hours(24)) {
> throw ....
> }
> return ptime(d, td);
> }
Hmmm, upon closer thought this will also pass for times such as "22:99:00".
I'd need to check all parts, which feels a bit disturbing.
I realize that a "time_duration" doesn't necessarily correspond to a valid
time of day. How about implementing something like
boost::posix_time::time_of_day, which would validate such things on input?
At least for me it's a bit unintuitive that it's possible to sucessfully
stream in a ptime when the time part isn't really a valid clock time.
Regards,
Johan