Re: [boost] phoenix::bind

Subject: Re: [boost] phoenix::bind
From: Joel de Guzman (joel_at_[hidden])
Date: 2008-10-02 19:01:54

Peter Dimov wrote:
> Joel de Guzman:
> 
>>     std::cout << "Double Square of " << 5 << " is " <<
>>         ffx(lambda[sqr(_1)], 5.0)()
>>     << std::endl;
> 
> This is not quite what I was after. As I understood your original 
> problem, we are looking for a construct lflx such that:
> 
>    lflx( f )
> 
> yields a function ffx such that
> 
>    ffx( x )
> 
> yields f( f( x ) ).
> 
> In other words, we want
> 
>    lflx( sqr )( 5.0 ) to give us sqr(sqr(5.0)).

Sure. Like this:

    ffx(lambda[sqr(_1)], _1)(i5) // pardon no rvalue (yet)

?

Cheers,
-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net