passing function template to class template

[Ali]

The code at the end of this message works just fine with M$ VS2005 but
with g++ 4.1.3 i get this:

node.cpp: In function ‘int main()’:
node.cpp:96: error: no matching function for call to
‘bnode<cxsc::interval>::bnode(cxsc::interval*, cxsc::interval*,
<unresolved overloaded function type>)’
node.cpp:38: note: candidates are: bnode<T>::bnode(const T*, const T*,
T (*)(const T&, const T&)) [with T = cxsc::interval]
node.cpp:34: note:                 bnode<T>::bnode() [with T =
cxsc::interval]
node.cpp:30: note:                 bnode<cxsc::interval>::bnode(const
bnode<cxsc::interval>&)
node.cpp:100: error: no matching function for call to
‘bnode<cxsc::interval>::bnode(cxsc::interval*, cxsc::interval*,
<unresolved overloaded function type>)’
node.cpp:38: note: candidates are: bnode<T>::bnode(const T*, const T*,
T (*)(const T&, const T&)) [with T = cxsc::interval]
node.cpp:34: note:                 bnode<T>::bnode() [with T =
cxsc::interval]
node.cpp:30: note:                 bnode<cxsc::interval>::bnode(const
bnode<cxsc::interval>&)

The crazy thing is that this

node<interval>* presult = new unode<interval> (&x, exp);
interval r = presult->evaluate();

works with g++ 4.1.3 correctly. The class interval is from C-XSC here:
http://xsc.de .

Any help is appreciated.

-------------------------------------------------------------------------
[node.cpp]

#include "interval.hpp"
#include "imath.hpp"
using namespace cxsc;

#ifdef _MSC_VER
#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h>
#ifdef _DEBUG
      #define new   new( _NORMAL_BLOCK, __FILE__, __LINE__)
#else
      #define DEBUG_NEW
#endif
#endif

template <class T>
class node {

public:

        virtual const T evaluate() = 0;

        virtual ~node();

};

template <class T> node<T>::~node() {}

template <class T>
class bnode : public node<T> {

public:

        bnode<T> () : node<T> () {};

        bnode<T> (const T* const Arg1,
                          const T* const Arg2,
                          T Bop (const T&, const T&))

                          : node<T> (), arg1(Arg1), arg2(Arg2), bop(Bop)  { };

        virtual const T evaluate();

        ~bnode<T>() {} ;

private:

        const T* arg1;
        const T* arg2;
        T (*bop) (const T&, const T&);


};

template <class T>
const T bnode<T>::evaluate()
{
        return (bop(*arg1, *arg2));
}

template <class T>
class unode : public node<T> {

public:

        unode<T> () : node<T> () {};

        unode<T> (const T* const Arg, T Uop (const T& ) )

                          : node<T> (), arg(Arg), uop(Uop)  { };

        virtual const T evaluate();

        ~unode<T>() {} ;

private:

        const T* arg;
        T (*uop) (const T& );


};

template <class T>
const T unode<T>::evaluate()
{
        return (uop(*arg));
}


int main() {

        // exp(x + y*z)
        interval x(2), y(3), z(0.5);

        node<interval>* pyz = new bnode<interval> (&y, &z, operator*);

        interval yz = pyz->evaluate();

        node<interval>* px_p_yz = new bnode<interval> (&x, &yz, operator+);

        interval x_p_yz = px_p_yz->evaluate();

        node<interval>* presult = new unode<interval> (&x_p_yz, exp);

        interval r = presult->evaluate();

        delete pyz;
        delete px_p_yz;
        delete presult;

#ifdef _MSC_VER
        _CrtDumpMemoryLeaks();
#endif

        return 0;

}
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