I think that your advice is a good choice. Using a function object is more clearly. However, if some one know how to do this using Lambda or Bind, please tell me. I want to know it. thanks! 2009/3/23 Christopher Currie <christopher@currie.com>
On Sun, Mar 22, 2009 at 8:52 PM, 钱晓明 <kyleqian@gmail.com> wrote:
I am sorry that I did not figure out the whole intention. Beside calling member function, I hope to delete the object immediately. I wrote the code at first time:
std::for_each( items.rbegin(), items.rend(), (_1->*&DiscardableItem::Discard, bind(delete_ptr(), _1)) );
after for_each, objects deleted, but Discard function did not been called. If using Bind can do the same thing, please tell me. thanks! 2009/3/23 Alex MDC <alex.mdc@gmail.com>
At this point, though you probably *can* do what you want with bind, you may want to consider if it will be easier (and clearer in intent) to simple write a function object that implements your desired behavior:
struct Discarder : std::unary_function<DiscardableItem*,void> { void operator()( DiscardableItem * pd ) const { pd->Discard(); delete pd; } };
std::for_each( items.rbegin(), items.rend(), Discarder() );
HTH, Christopher _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users