Re: [boost] [mpl, fusion] minimal conforming sequence

From: David Abrahams (dave_at_[hidden])
Date: 2008-08-21 23:45:33

on Wed Aug 20 2008, "Peter Dimov" <pdimov-AT-pdimov.com> wrote:

> Hi,
>
> Assume that I have a custom type sequence S that has two operations,
> size<S>::value and element<S,I>::type (with whatever spelling).
>
> What needs to be done to adapt S into a conforming MPL or Fusion sequence?
>
> In a perfect world, the answer would not require the inclusion any MPL
> or Fusion headers and would consist of three specializations. ;-) 

Well, if it's an MPL sequence it's a fusion sequence, IIUC.  So you need
to decide which sequence to model
http://www.boost.org/doc/libs/1_36_0/libs/mpl/doc/refmanual/concepts.html

According to
http://www.boost.org/doc/libs/1_36_0/libs/mpl/doc/refmanual/forward-sequence.html
you can make a forward sequence with 5 specializations.

Please let me know if that's not enough information.

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com