Re: [Boost-users] combining mpl sequences

Subject: Re: [Boost-users] combining mpl sequences
From: Karsten Ahnert (karsten.ahnert_at_[hidden])
Date: 2010-09-05 16:35:16

> You're already most of the way there.  If you can break it down into
> three similar steps, you can write a single step as a metafunction:
> 
> template <class PrevResult, class MyType>
> struct step 
> : mpl::insert_range<
>     PrevResult ,
>     mpl::end< PrevResult >::type ,
>     containers< MyType >
>   >
> {};
> 
> Then you can fold that step across your types:
> 
> typedef typename 
>     mpl::fold< my_types, mpl::vector<>, step<mpl::_,mpl::_> >::type
> all_containers;
> 
> This produces a sequence with a different ordering than the one in
> your "hence" clause, but it's the same ordering as you'd get in your
> own all_containers above.  

Thanks, this starts to become fun. I also found another way with copy
and inserters.

Cheers,

Karsten