Re: [boost] [Review] Formal Review: Boost.Move

Subject: Re: [boost] [Review] Formal Review: Boost.Move
From: vicente.botet (vicente.botet_at_[hidden])
Date: 2010-05-16 11:35:55

----- Original Message ----- 
From: "Mathieu -" <ptr.jetable_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Sunday, May 16, 2010 12:46 PM
Subject: Re: [boost] [Review] Formal Review: Boost.Move

> 
> On 16 May 2010 12:24, vicente.botet <vicente.botet_at_[hidden]> wrote:
> 
>>>> * BTW, why BOOST_RV_REF_2_TEMPL_ARGS and BOOST_RV_REF_3_TEMPL_ARGS are needed?
>>>>
>>>
>> >Consider what the preprocessor would make of BOOST_RV_REF( tmpl< T, U >
>> >)...oops!  The preprocessor thinks you're passing 2 parameters to
>> >BOOST_RV_REF :(
> 
>>Sorry, I have not tried this, but does BOOST_RV_REF(( tmpl< T, U > )) fails?
> 
> That's what I tried ( unfortunately AFTER posting :/), but it doesn't
> work with types because the macro expand to something like :
> 
> ::boost::rv<(tmpl<T,U>)> which is an invalid template argument..

:( I have no tested it neither before posting. We have then the possibility to write

BOOST_RV_REF_2_TEMPL_ARGS(Tmpl, A1, A2)

or 

typename rvalue_ref<Tmpl<A1,A2> >::type

I prefer to write code that doesn't use macros as far as it is possible.

Best,
Vicente