Re: [Boost-users] [date_time] How to create a date fromstringwithspecific format?

From: Jeff Garland (jeff_at_[hidden])
Date: 2006-03-23 10:04:23

Christian Henning wrote:
> Thank you very much. I was not paying to attention. My fault.
> 
> For the records, here is a sample that works:
> 
>    date_input_facet* pMyFacet = new date_input_facet( "%m-%d-%Y" );
> 
>    std::istringstream oo;
>    oo.imbue( std::locale(oo.getloc(), pMyFacet ));
>    oo.str( "11-03-2006" );
> 
>    date myDate;
> 
>    try
>    {
>       oo >> myDate;
> 
>       date::ymd_type ymd = myDate.year_month_day();
> 
>       std::cout << myDate;
>    }
>    catch( std::out_of_range oEx )
>    {
>       std::cout << "Error: " << oEx.what() << std::endl;
>    }
> 
> Unfortunately a string like "11-3-1997" wont work since the day is
> just a single digit. Is that something the date_time lib will be able
> to understand in the future?

Sure.  I've uploaded an experimental change that you can try out to the 
vault:

http://www.boost-consulting.com/vault/index.php?&direction=0&order=&directory=date_time

Basically you need to drop the format_date_parser.hpp into you 
boost/date_time directory. This also allows for single digit days in 
addition to months.

The only reason it's experimental is that it changes the behavior of 
failures for undelimited string parsing.  For example, the iso format 
2006021 will now succeed instead of failing.  I believe this can be 
resolved, but it's going to take a bit more time...

Jeff