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