[boost] boost::bind - simple test case does not work...

From: Marc Jacobs (marcja_at_[hidden])
Date: 2003-03-03 17:03:35

While I've successfully used boost::bind before, I cannot seem to get this
simple test case to work.

#include <boost/bind.hpp>
#include <iostream>

using namespace boost;
using namespace std;

struct X
{
    void f( int i )
    {
        cout << i << "\n";
    }
};

int main( int argc, char * argv[] )
{
    X x;

    bind( &X::f, &x, 6 )();     // works
    bind( &X::f, &x, _1 )( 6 ); // error!

    return 0;
}

It fails during compilation with the following error messages:
callback.cpp: In function `int main (int, char **)':
callback.cpp:20: no match for call to `(boost::_bi::bind_t<void,
boost::_mfi::mf1<void, X, int>, boost::_bi::list2<boost::_bi::value<X
*>, boost::arg<1> > >) (int)'
/usr/local/include/boost/bind/bind_template.hpp:19: candidates are: typename
boost::_bi::result_traits<R, F>::type boost::_bi::bind_t<R, F,
L>::operator() () [with R = void, F =
boost::_mfi::mf1<void, X, int>, L = boost::_bi::list2<boost::_bi::value<X
*>, boost::arg<1> >]
/usr/local/include/boost/bind/bind_template.hpp:25:                 typename
boost::_bi::result_traits<R, F>::type boost::_bi::bind_t<R, F,
L>::operator() () const [with R = void,
F = boost::_mfi::mf1<void, X, int>, L =
boost::_bi::list2<boost::_bi::value<X *>, boost::arg<1> >]
/usr/local/include/boost/bind/bind_template.hpp:31:                 typename
boost::_bi::result_traits<R, F>::type boost::_bi::bind_t<R, F,
L>::operator() (A1 &) [with A1 = int, R
= void, F = boost::_mfi::mf1<void, X, int>, L =
boost::_bi::list2<boost::_bi::value<X *>, boost::arg<1>
>]
/usr/local/include/boost/bind/bind_template.hpp:37:                 typename
boost::_bi::result_traits<R, F>::type boost::_bi::bind_t<R, F,
L>::operator() (A1 &) const [with A1 =
int, R = void, F = boost::_mfi::mf1<void, X, int>, L =
boost::_bi::list2<boost::_bi::value<X *>,
boost::arg<1> >]

Suggestions?
Marc