Re: [boost] [range/iterators/algorithms/phoenix/bind...] Coordinated Approach

From: David Abrahams (dave_at_[hidden])
Date: 2008-07-02 18:06:01

Giovanni Piero Deretta wrote:
> On Wed, Jul 2, 2008 at 8:40 PM, Eric Niebler <eric_at_[hidden]> wrote:

>> I don't know a sufficiently portable way to ask a type whether it has
>> implemented the result_of protocol. In C++0x, result_of will simply use
>> decltype, so at the very least Phoenix's approach is forward-compatible.
>>
> 
> With 'portable' you mean 'works with non completely compliant  compilers'?
> Otherwise I think you can legally sfinae on the presence of both
> result<> and result_type.

Demonstration, please.  I don't know of a way to detect a nested
template with SFINAE.

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