Re: [boost] date_time: local_date_time small fix

From: Jeff Garland (jeff_at_[hidden])
Date: 2005-11-28 07:25:50

On Sun, 27 Nov 2005 09:56:33 +0200, Roman Yakovenko wrote
> Good morning.
> 
> Consider next use case:
> 
> struct my_ldt : public boost::local_time::local_date_time_base<>{
> my_ldt()
> : boost::local_time::local_date_time_base<>( 
> boost::posix_time::ptime()    , boost::shared_ptr< 
> boost::date_time::time_zone_base<boost::posix_time::ptime> >() ) {}
> 
> };
> 
> int _tmain(int argc, _TCHAR* argv[])
> {
>     boost::posix_time::ptime t;
>     my_ldt m;
>     m == t; 
>     //^^^^^^^^
>     //this will not compile ( at least on VC 7.1 )
>    //the error is error C2678: binary '==' : no operator found which 
> takes a left-hand operand of type 'my_ldt' (or there is no 
> acceptable conversion) }
> 
> fix:
> 
> Add next code to the local_date_time_base class
> 
>    typedef date_time::base_time<utc_time_, 
> boost::posix_time::posix_time_system> base_type;
> 
>    using base_type::operator==;
>    using base_type::operator<;
>    using base_type::operator-;

Actually it's intentional to not do an automatic conversion there.  Call
utc_time() to get the ptime.  So:

     boost::posix_time::ptime t;
     my_ldt m;
     m.utc_time() == t; 

Jeff