sorry i reply to wrong email. Please disregard.

On Feb 5, 2008 5:09 AM, chun ping wang <cablepuff@gmail.com> wrote:
I am willing ot help out but i don't guaranteed i could make it on time.. like yesterday i got back around 7:50ish ... and sometimes i come back at 8:20 to 8:30 so under mine.. make sure you put someone as backup...

In Christ,
Chun.


On Feb 4, 2008 9:05 PM, Alexis H. Rivera-Rios <ahrivera@yahoo.com> wrote:
Hi,

I'm trying to use a transform iterator and lower_bound
to search a list of integers as if it was list of
booleans.

According to the message the const_mem_fun_ref_t
doesn't have a default constructor. Is there a way to
make this code compile?

Your help will be appreciated!
Alex

#include<functional>
#include <vector>
#include <algorithm>
#include <boost/iterator/transform_iterator.hpp>

class T
{
public:
       int _a;
       T(int a) : _a(a) {}
       bool greaterZero() const { return _a > 0; }
};

int main(void)
{
       typedef std::vector<T> Tlist;
       typedef std::const_mem_fun_ref_t<bool,T> Function;
   typedef boost::transform_iterator<Function,

Tlist::const_iterator> Iterator;

       Tlist x;
       Iterator
b(x.begin(),std::mem_fun_ref<bool,T>(&T::greaterZero)),

e(x.end(),std::mem_fun_ref<bool,T>(&T::greaterZero));


       std::lower_bound(b,e,false);
}


Error log:
BD Software STL Message Decryptor v3.10 for gcc 2/3/4
matob.cpp:28:2: warning: no newline at end of file
/cygdrive/c/opt/boost_1_34_1/boost/iterator/transform_iterator.hpp:
In
   constructor
  `boost::transform_iterator<
       main()::Function, vector<T>::const_iterator,
boost::use_default
     , boost::use_default
   >::transform_iterator()':
stl_algo.h:2627:   instantiated from
  `boost::transform_iterator<
       main()::Function, vector<T>::const_iterator,
boost::use_default
     , boost::use_default
   > lower_bound(
       boost::transform_iterator<
           main()::Function,
vector<T>::const_iterator, boost::use_default
         , boost::use_default
       >, boost::transform_iterator<
           main()::Function,
vector<T>::const_iterator, boost::use_default
         , boost::use_default
       >, const bool &
   )'
matob.cpp:26:   instantiated from here
/cygdrive/c/opt/boost_1_34_1/boost/iterator/transform_iterator.hpp:100:
error:
   No match for `const_mem_fun_ref_t<bool,
T>::const_mem_fun_ref_t()'
stl_function.h:640: candidates are:
const_mem_fun_ref_t<bool, T>
   ::const_mem_fun_ref_t(const
const_mem_fun_ref_t<bool, T> &)
stl_function.h:644:  const_mem_fun_ref_t<
       bool, T>::const_mem_fun_ref_t(bool (T::*)()
const)



Programming Tutorial:
In Python: To do this, do this
In Perl: To do this, do this or this or this or this...
In C: To do this, do this, but be careful
In C++: To do this, do this, but don't do this, be careful of this, watch out for this, and whatever you do, don't do this


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