Re: [boost] Re: Quick thought on Date-Time

From: Jeff Garland (jeff_at_[hidden])
Date: 2004-04-25 16:33:19

On Sun, 25 Apr 2004 17:03:18 -0400, David Abrahams wrote

> >> So maybe a new type should be made that just represents year & 
> >> month.  Every year still only has 12 months.  Of course, your 
> >> problem comes back if you want to mix days in.
> >
> > Exactly, and I don't know what I would do with this type without mixing them
> > back in...
> 
>     if (some_date.is_in(Jun/2004))
>        std::cout << "that's a hot one!";

You didn't need to invent a type to do this -- you just added a function to
the date.  You would have to reverse it to be what Daryle is suggesting:

 date d(...);
 some_month_type x(2004, Jun);
 x.contains(d);

But we already have date_period for this:
 date start_of_month(...), end_of_month(...);
 date_period dp(start_of_month, end_of_month); 
 dp.contains(d);

So why not a date_period generator function instead?
  date_period make_month_period(greg_year y, greg_month m);
Then it would be:
  date_period dp = make_month_period(2004, Jun);
  if (dp.contains(d))  // or is_after, is_before, ...

Jeff
ps: And where I live you can bank on June being hot :-)