Re: [Boost-users] [icl] joining two simple intervals

Subject: Re: [Boost-users] [icl] joining two simple intervals
From: Jeff Flinn (Jeffrey.Flinn_at_[hidden])
Date: 2013-07-22 12:53:29

On 7/22/2013 11:37 AM, Olaf Krzikalla wrote:
> Hi,
>
> I just tried and failed to find a simple way to compute the upper and
> lower bounds of some interval_sets:
>
> typedef boost::icl::interval_set<int> list_type;
> typedef list_type::value_type interval;
>
> void add_region(interval& av, const list_type& reg)
> {
>    av += reg; // didn't work
>    if (!reg.empty())
>    {
>      // didn't work either:
>      av += tAddressInterval(
>              reg.begin()->lower(),
>              (--reg.end())->upper()));
>
>      // this one works:
>      av = tAddressInterval(std::min(av.lower(), reg.begin()->lower()),
>                            std::max(av.lower(), (--reg.end())->upper()));
>    }
> }
>
>
> My workaround doesn't even respect the boundary types.
> I wonder if there is not a simpler way for such a fundamental tasks.

Is this what you want?:

av = hull( hull(reg), av);

per 
http://www.boost.org/doc/libs/1_52_0/libs/icl/doc/html/boost_icl/function_reference/range.html

Jeff