Re: [boost] [proto] design of expr<>

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-03-22 10:13:20

AMDG

Larry Evans wrote:
> On 03/22/08 06:12, Dean Michael Berris wrote:
> [snip]
>   
>> I think this begs the question then, what is the necessity for an
>> Arity parameter as part of the definition of an expr<>?
>>
>>     
>
> According to:
>
> http://archives.free.net.ph/message/20080310.170830.c4548dd4.en.html
>
> it's use for specialization.  In my reply to that post I suggested
> maybe a helper template to eliminate the need for this 3ird
> parameter, but then, AFAICT, this just delays the need for a 3
> parameter expr...but wait, if some how the 2 parameter expr
> were public and somehow the 3 parameter were made private,
> maybe that would be better.

Well, since expr is an aggregate, adding an extra layer of indirection would
change the interface, so I don't think that would work.

In Christ,
Steven Watanabe