RE: [boost] Re: A couple of issues in submitting typelists to boo st

From: Aleksey Gurtovoy (alexy_at_[hidden])
Date: 2001-11-26 13:47:41

David Abrahams wrote:
> Except, please remember that repeated push_backs on a type_list can be
> horribly inefficient (at compile-time). 

I remember, Dave :).

> It would be good to have an
> algorithm framework based on this:
> 
> template <class Sequence, class FwdFunction, class 
> BackwardFunction, class
> Initial> two_way_accumulate...
> 
> Think of it as mpl::accumulate which calls FwdFunction on the 
> way in to the recursion and BackwardFunction on the way out. 
> Then we could implement transform in terms of push_front.

It makes a perfect sense for me. I guess it just needs to be done, finally
:). Of course, there are some issues of how this integrates with the already
existing stuff.. I'll try to do it, analyze the results, and report them
back here.

Aleksey