[boost] Re: mpl::inherit_linearly reuse to produce loki's tuple?

From: David Abrahams (dave_at_[hidden])
Date: 2004-12-12 10:44:13

Larry Evans wrote:
> Could inherit_linearly be used to create
> something like loki's tuple?  The name,
> inherit_linearly, and a very brief look
> at the code suggests it does something
> like loki's GenScatterHeirarchy, which
> was used to create the loki tuples
> as shown in:
> 
> http://cvs.sourceforge.net/viewcvs.py/loki-lib/loki/Reference/HierarchyGenerators.h?rev=1.5&view=auto

Yes it can be used that way.

> If so, then I was wondering if it would
> be worth it to reuse inherit_linearly to
> implement boost's tuple?

I don't think so.  What would we gain by it?

The successor to Boost.Tuple is described in
http://www.boost.org/libs/spirit/fusion/readme.txt.  Since fusion tuples
are "flat" structures, there's no win in building them by repeated
folding of an input sequence.

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com