Re: [Boost-users] Problem with counting iterator and bind

From: Peter Dimov (pdimov_at_[hidden])
Date: 2006-11-10 17:19:18

Maitre Bart wrote:
> Maitre Bart <maitrebart <at> excite.com> writes:
>
> Typos corrected:
>
>
> I have this:
>
>  typedef LegacySequentialContainer<string> LegacyStringVector;
>
>  LegacyStringVector lsv;
>
>  // ... filling lsv with strings ...
>
> I realized this:
>
>  boost::counting_iterator<int> it(0);
>  boost::counting_iterator<int> end(lsv.length());
>  while (it < end)
>    cout << boost::bind(&LegacyStringVector::operator[], lsv,
> _1)(*it++) << " ";
>  cout << "\n";
>
> and it works. However, I wish to do the same but using std::copy or
> std::for_each instead.
>
> I tried the following but none is able to compile:
>
>  copy(boost::counting_iterator<int>(0),
>       boost::counting_iterator<int>(lsv.size()),
>       boost::bind(ostream_iterator<string>(cout, " "),
>                   &vector<string>::operator[],
>                   lsv,
>                   _1));

std::copy doesn't take a function object as it third argument, just an 
iterator. Try std::transform:

std::transform(
    boost::counting_iterator<int>(0),
    boost::counting_iterator<int>(lsv.size()),
    ostream_iterator<string>(cout, " "),
    boost::bind( &LegacyStringVector::operator[], lsv, _1)
);