Re: [Boost-users] Date_time library question

Is the only way to initialize date and ptime using strings like date d(from_simple_string(s)); NOT stringstreams stringstream ss("2004-Jan-1"); date; ss >> d; Michal On Fri, 2005-09-16 at 16:36 -0700, Bart wrote:

"Michal Lijowski" wrote in message news:1126883517.24859.2.camel@ml-cvu.wustl.edu...

...

I just started with date_time library using boost-1.33.0-3 on FC4 and gcc 4.0.1 20050727.

It is rpm version downloaded from http://download.fedora.redhat.com/pub/fedora/linux/core/development/i386/Fed....

I copied some lines of code from boost_date_time.pdf to get familiar with capabilities of this library and I encountered some problems.

Here is a modified code taken from page 3 of the manual

...snip...

...

My question is why d and t0 are not-a-date-time? Is this expected?

Yes, this is expected. The default constructors for date & ptime initialize to not_a_date_time.

...

Also the line

ptime t1(d3, hours(5)+nanosec(100)); //date + time of day offset

compiles with error: 'nanosec' was not declared in this scope

date_time can be compiled with either microsecond resolution or nanosecond resolution. If microsecond resolution (the default) was used, the nanosec code won't be available.

To enable nanosecond resolution, simply define BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG.

Bart

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