Re: [boost] [Bind] How do I get bind to deduce the return type of for_each?

Subject: Re: [boost] [Bind] How do I get bind to deduce the return type of for_each?
From: Daniel Walker (daniel.j.walker_at_[hidden])
Date: 2010-04-17 10:12:23

On Sat, Apr 17, 2010 at 8:58 AM, Roland Bock <rbock_at_[hidden]> wrote:
> Daniel Walker wrote:
>> On Sat, Apr 17, 2010 at 7:25 AM, Roland Bock <rbock_at_[hidden]> wrote:
>>>
>>>  for_each(vov.begin(), vov.end(),
>>>       bind(for_each< vocType::iterator, function<void (myClass&)> >,
>>>          bind<vocType::iterator>(&vocType::begin, _1),
>>>          bind<vocType::iterator>(&vocType::end, _1),
>>>          protect(bind(&myClass::func, _1))
>>>          )
>>>       );
>>>
>>
>> Oh yeah, that's a good idea! Instantiate std::for_each with a void
>> boost::function! That's a portable solution as well, since bind and
>> function are available on practically any compiler, even ancient,
>> substandard ones.
>>
>> Daniel Walker
>>
>>
>
> Thanks :-)
>
> Btw, could I do the same with tr1::bind? What would be the equivalent of
> boost::protect?

Yeah, you can do the same thing in TR1. Instead of boost::protect, you
can just use tr1::function, again. :)

   for_each(vov.begin(), vov.end(),
         bind(for_each< vocType::iterator, function<void (myClass&)> >,
            bind<vocType::iterator>(&vocType::begin, _1),
            bind<vocType::iterator>(&vocType::end, _1),
            function<void(myClass&)>(bind(&myClass::func, _1))
            )
         );

Actually, I once wrote a functional_cast (analogous to lexical_cast)
that did something like that. It's in vault.

Daniel Walker