Re: [boost] Re: Formal Review request: Pointer Container Library

From: Peter Dimov (pdimov_at_[hidden])
Date: 2003-12-23 08:34:27

Thorsten Ottosen wrote:
> "Darren Cook" <darren_at_[hidden]> wrote in message
> news:3FE77A19.7050409_at_dcook.org...
>> I think the example needs to be more motivating :-).
> 
> well, it's hard to put all the benefits into one small introducing
> example, 
> but it could be beter than that.
> 
>> Using normal vector:
>>       for_each( svec.begin(), svec.end(), PolyPtrOps() );
>> 
>> Using your class:
>>       for_each( pvec.begin(), pvec.end(), mem_fun_ref( &Poly::foo )
>> ); 
>> 
>> If saving writing a functor is all then we might as well use boost
>> lambda

Or mem_fn.

> not if we need to reuse the functor; you can't store a lambda
> expression and use it later.

If you want to demonstrate reuse you need a better example than

for_each( svec.begin(), svec.end(), mem_fn(&Poly::foo) );
for_each( pvec.begin(), pvec.end(), mem_fn(&Poly::foo) );

> PolyPtrOps() could be more complicated that shown.
> 
>> or
>> bind:
>>       for_each( svec.begin(), svec.end(), bind(&Poly::foo,_1) );
> 
> does bind really works with smart pointers?

Yes it does. Try it.