Re: [Boost-users] [Boost][lambda] Newbie Questions: member pointer operator use

From: Roman Krylov (Roman.Krylov_at_[hidden])
Date: 2005-06-30 10:54:41

Brian Allison wrote:

>...    for_each(src.begin(), src.end(),
>             if_then(  bind<bool>(&vector<Rec*>::empty, &var(dst)),
>                       bind<void>(&vector<Rec*>::push_back, &var(dst), 
>_1) ) );
>  
>
isn't it equal to:

    if(dst.empty()) { dst.push_back(src.front()); }

? The sample is for training purposes?

>    for_each(src.begin(), src.end(),
>             if_then(bind<bool>(&vector<Rec*>::empty, &var(dst)),
>                     (&var(dst) ->* &vector<Rec*>::push_back)(_1)
>                 )
>             );
>  
>
In either previous and in this case mere '&dst' should be used instead 
of '&var(dst)' without '(_1)' perhaps.