Re: [boost] Re: cref(_1)

From: John Torjo (john.lists_at_[hidden])
Date: 2004-03-15 01:17:04

David Abrahams wrote:

>John Torjo <john.lists_at_[hidden]> writes:
>
>  
>
>>>It seems to me that, since I know that binding to an rvalue is
>>>required, we ought to have a way to say "force this to be a const
>>>ref".  I thought of something like
>>>
>>>       std::for_each(
>>>           make_difference_iterator(p->second.begin())
>>>         , make_difference_iterator(p->second.end())
>>>         , boost::bind(&fu::writeVInt, &prox, boost::cref(_1)));
>>> 
>>>
>>>      
>>>
>>How about constifying the original sequence?
>>    
>>
>
>That wouldn't help.
>  
>

duh :D what was I thinking?

However, I looked for difference iterator, and did not find any docs or 
anything else.

So, for the above case, what's the difference_iterator's value_type and 
reference, and what's the writeVInt's signature?

Best,
John