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

From: David Abrahams (dave_at_[hidden])
Date: 2008-07-02 14:28:09

Eric Niebler wrote:
> David Abrahams wrote:
>> Eric Niebler wrote:
>>> The Phoenix/Proto port in (Phoenix v3) uses BOOST_TYPEOF to deduce the
>>> the type of expressions involving operators, with the exception of the
>>> function call operator. For the function call operator, Phoenix v3 uses
>>> result_of to calculate the return type.
>>
>> Interesting.  Kinda makes sense, but could you explain the rationale
>> anyway?
> 
> You mean, the rationale for using result_of instead of BOOST_TYPEOF for
> the function call operator? BOOST_TYPEOF can't perfectly distinguish
> between lvalues and rvalues. I fudge it where I have to, but with
> function calls no fudging is necessary because result_of presumably
> gives the right answer.

Assuming it's implemented, yeah.  It might be nice to be able to fudge
when it isn't :-)

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