Re: [Boost-users] Possible bugs in date_time package

From: Jeff Garland (jeff_at_[hidden])
Date: 2007-02-27 15:15:02

Gregory J. Sharp wrote:
> On 27Feb2007, at 10:58 , Jeff Garland wrote:
> 
>> The main problem is that the time_from_string function is expecting  
>> a complete
>> time (eg: 2006-12-26 00:00:00), not just a date.  I believe all of  
>> these will
>> parse correctly if you do this:
>>
>>     using namespace boost::gregorian;
>>     date d = from_string("2006-12-06");
>>
>> which can trivially be turned into a ptime if that's what you need.
> 
> Thanks. I didn't see the requirement that it have a time component in  
> the manual. Perhaps it is worth adding a note about that?
> 
> The fact that it silently accepts "2006-12-06" but does the wrong  
> thing(TM) with it, is also a worry.

I thought this case threw and exception and "2006,12,06" didn't?  And, 
honestly I find it strange -- what was the constructed value? NADT?

> I will try to make a time_from_Gstring() function that parses more  
> aggressively, since I also prefer to avoid things like "2006-05-06  
> 123" being a valid time, in my application.

You might have a look at the iostream, format facet-based parsing approaches. 
  This is the more flexible and complete way to do date-time i/o

http://www.boost.org/doc/html/date_time/date_time_io.html

I pretty much never use the from_string stuff anymore.

Jeff