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Subject: [Boost-users] "apply" member function over collection
From: John M. Dlugosz (mpbecey7gu_at_[hidden])
Date: 2011-09-17 04:28:53

Consider this:

     // new way, so far so good
     boost::range::for_each (mylist, std::tr1::bind(&C::foo, _1));

// original:
// for(Collection::iterator fi = mylist.begin(); fi != mylist.end(); ++fi) {
// Collection::reference item = *fi;
// item->foo();
// }

I've got a zillion of these one-shot "for" loops, and I was able to change this sample to
use a range::for_each. But, it's still too ackward and will be unfamiliar to other users,
so it has to be "sleek or bust"!

The item type is actually a smart pointer.

Is there a more succinct way of writing it, without needing the extra placeholder to be
The for_each works find as an "apply" except that the member function needs to be adapted;
it won't do that by itself.
I found that boost::range::for_each (Filters,
compiles too, even though I'll be passing a smart pointer to the resulting adapted
function. But, as mentioned on another thread, mem_fn is deprecated?

How might I write this more tersely, or provide an 'apply' utility of my own that does
what I want?


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