Re: [boost] [Boost.Lambda] Some new features are suggested: return, iterating yield, & local var

Subject: Re: [boost] [Boost.Lambda] Some new features are suggested: return, iterating yield, & local var
From: Dave Abrahams (dave_at_[hidden])
Date: 2012-01-05 13:18:44

on Thu Jan 05 2012, Mathias Gaunard <mathias.gaunard-AT-ens-lyon.org> wrote:

> On 01/04/2012 05:05 AM, Huang Huan wrote:
>> Yes, Boost.Phoenix do a lot forward in unname function.
>> Unfortunately the presented features are not found in it.
>>
>> 2012/1/4 Mathias Gaunard<mathias.gaunard_at_[hidden]>
>>> return is hard to implement, since each expression is building its own
>>> expression, so you need to forward it along the whole chain.
>>> Exceptions could also be used, but it's not very nice.
>
> Sorry, I meant "since each expression is building its own function" here.

In principle that shouldn't limit anything, right?  There's no reason
that "a, b" (or any other lambda expression containing a and b) has to
be evaluated via straightforward evaluations of a and b... I think.

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