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From: rogeeff (rogeeff_at_[hidden])
Date: 2002-02-11 18:18:26

I can't seems to make Projection Iterator to work with ptr_fun.

Here is modified example on projection iterator:

#include <boost/config.hpp>
#include <list>
#include <iostream>
#include <iterator>
#include <algorithm>
#include <string>
#include <functional>
#include <boost/iterator_adaptors.hpp>

struct personnel_record {
  personnel_record( std::string n, int id ) : m_name(n), m_ID(id) {}

  std::string m_name;
  int m_ID;

const std::string&
select_name( const personnel_record& r )
    return r.m_name;

int main(int, char*[])
  std::list<personnel_record> personnel_list;

  personnel_list.push_back(personnel_record("Barney", 13423));
  personnel_list.push_back(personnel_record("Fred", 12343));
  personnel_list.push_back(personnel_record("Wilma", 62454));
  personnel_list.push_back(personnel_record("Betty", 20490));

  std::copy( boost::make_projection_iterator( personnel_list.begin(),
std::ptr_fun( select_name ) ),
             boost::make_projection_iterator( personnel_list.end(),
std::ptr_fun( select_name ) ),
             std::ostream_iterator<std::string>( std::cout, "\n" ) );
  std::cout << std::endl;

  return 0;

Any ideas?


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