[Boost-users] [Boost Lambda] Simple problem using argument as object: part III

From: Thaddeus Olczyk (doctlo-boost_at_[hidden])
Date: 2005-07-28 05:12:25

Ok. I'm still not getting it. Sorry for the inconvenience. Another
piece of sample code that doesn't compile. Thanks.

#include <boost/lambda/lambda.hpp>
#include <boost/lambda/bind.hpp>
#include <boost/lambda/if.hpp>
#include <vector>
#include <set>
#include <string>
#include <iostream>

using boost::lambda::_1;
using boost::lambda::bind;

class A
{
  std::string s;
public:
  A(std::string sIn):s(sIn){}
  void print_A()
  {
    std::cout<<"A="<<s<<std::endl;
  }
  bool isLong()
  {
    return s.length()>5; 
  }
  std::string get(){return s;}
};

typedef std::vector<A *> AList;
typedef std::set<std::string> StrList;

int main()
{
 std::string in;
 AList alist;
 StrList excluded;
 while(in!="end")
 {
   in="";
   std::getline(std::cin,in);
   alist.push_back(new A(in));
 }
 std::for_each(alist.begin(),alist.end(),

boost::lambda::if_then((bind(&StrList::find,&excluded,bind(&A::get,_1)))
                                      !=excluded.end()),

bind(&StrList::insert,&excluded,bind(&A::get,_1)));
 std::for_each(alist.begin(),alist.end(),
               bind(&A::print_A,_1));
 return 1;
}
-----------------------------------
main2.cpp:43: error: no matching function for call to `bind(<unknown
type>, StrList*, const
boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,
boost::lambda::function_action<2, boost::lambda::detail::unspecified>
>, boost::tuples::tuple<std::string (A::*const)(), const
boost::lambda::lambda_functor<boost::lambda::placeholder<1> >,
boost::tuples::null_type, boost::tuples::null_type,
boost::tuples::null_type, boost::tuples::null_type,
boost::tuples::null_type, boost::tuples::null_type,
boost::tuples::null_type, boost::tuples::null_type> > >)'
main2.cpp:45: error: no matching function for call to `bind(<unknown
type>, StrList*, const
boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::action<2,
boost::lambda::function_action<2, boost::lambda::detail::unspecified>
>, boost::tuples::tuple<std::string (A::*const)(), const
boost::lambda::lambda_functor<boost::lambda::placeholder<1> >,
boost::tuples::null_type, boost::tuples::null_type,
boost::tuples::null_type, boost::tuples::null_type,
boost::tuples::null_type, boost::tuples::null_type,
boost::tuples::null_type, boost::tuples::null_type> > >)'

--
Thad