Re: [Boost-Users] Re: Does filter_iterator work for maps?

From: Jeremy Siek (jsiek_at_[hidden])
Date: 2002-03-16 00:19:23

Hi Rodrigo,

The above program compiles OK for me with g++ 2.95.2. What compiler are
you using? (there's a good chance the compiler error you are getting is a
bug in your compiler, not in your code or in the Boost code).

Cheers,
Jeremy

On Sat, 16 Mar 2002, rodrigo_braz wrote:

rodrig> --- In Boost-Users_at_y..., Jon Kalb <kalb_at_L...> wrote:
rodrig> > At 3:01 AM +0000 3/15/02, rodrigo_braz wrote:
rodrig> > >   copy(boost::make_filter_iterator<pair_is_active>(m.begin, m.end
rodrig> ()),
rodrig> >
rodrig> > copy(boost::make_filter_iterator<pair_is_active>(m.begin(), m.end
rodrig> ()),
rodrig>
rodrig> Ouch. Ok, sorry about that. Actually my main problem with this
rodrig> iterator is in the code below:
rodrig>
rodrig> #include <vector>
rodrig> #include "boost/iterator_adaptors.hpp"
rodrig>
rodrig> using namespace std;
rodrig> using namespace boost;
rodrig>
rodrig> struct is_active {
rodrig>   bool operator()(int p) { return 0 < p; }
rodrig> };
rodrig>
rodrig> struct A
rodrig> {
rodrig>   typedef
rodrig> filter_iterator_generator<is_active,vector<int>::iterator>::type
rodrig> active_iterator;
rodrig>   active_iterator i; // PROBLEM
rodrig> };
rodrig>
rodrig> int main()
rodrig> {
rodrig>   A a;
rodrig>   return 0;
rodrig> }
rodrig>
rodrig> I get the error messages:
rodrig>
rodrig> 15: Type name expected
rodrig> 15: Multiple declaration for 'A::active_iterator'
rodrig> 14: Earlier declaration of 'A::active_iterator'
rodrig> 15: Declaration missing ;
rodrig>
rodrig> Thanks,
rodrig>
rodrig> Rodrigo
rodrig>
rodrig>
rodrig>
rodrig>
rodrig> Info: <http://www.boost.org>
rodrig> Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl>
rodrig> Unsubscribe: <mailto:boost-users-unsubscribe_at_[hidden]>
rodrig>
rodrig>
rodrig> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
rodrig>
rodrig>

----------------------------------------------------------------------
 Jeremy Siek                          http://php.indiana.edu/~jsiek/
 Ph.D. Student, Indiana Univ. B'ton   email: jsiek_at_[hidden]
 C++ Booster (http://www.boost.org)   office phone: [phone]
----------------------------------------------------------------------