[C++-sig] Can't get a simple example with fstream to compile & link

[Fast Bike]

I have been trying this for a little while. I can do
simple examples, but when I try to do something a
little more complex I get litany of errors.

For example creating a simple class that uses an
instance of fstream seems to give me trouble.

Example:
class PythonWrapper
{
public:
	PythonWrapper(int id) : { myid = id; };
private:
	int myid;
	std::fstream myfile;
};

BOOST_PYTHON_MODULE(PythonWrapper)
    {
    	using namespace boost::python;
    	
        scope x_class =
        class_<PythonWrapper>("PythonWrapper",
init<int>())

        ;
        
    }

Gives me:
/usr/local/gcc_3.2/bin/g++ -c -DOTL_ODBC_UNIX
-DOTL_STL -DOTL_ANSI_CPP -DOTL_STREAM_POOLING_ON
PrintFileStats/PythonWrapp
er.cpp -I/home/kstrauss/boost/boost_1_30_0
-I/usr/local/python-2.2/include/python2.2
PrintFileStats/PythonWrapper.cpp: In constructor 
   `PythonWrapper::PythonWrapper(int)':
PrintFileStats/PythonWrapper.cpp:21: no base or member
initializers given 
   following ':'
/usr/local/gcc_3.2/include/c++/3.2.2/bits/ios_base.h:
In copy constructor 
   `std::basic_ios<char, std::char_traits<char>
>::basic_ios(const 
   std::basic_ios<char, std::char_traits<char> >&)':
/home/kstrauss/boost/boost_1_30_0/boost/python/object/value_holder.hpp:111:
  instantiated from `boost::python::objects::
value_holder<Held>::value_holder(PyObject*, A0) [with
A0 = boost::reference_wrapper<const PythonWrapper>,
Held = PythonWr
apper]'
/home/kstrauss/boost/boost_1_30_0/boost/python/object/make_instance.hpp:64:
  instantiated from `static Holder* boost::py
thon::objects::make_instance<T,
Holder>::construct(void*, PyObject*,
boost::reference_wrapper<const T>) [with T = PythonW
rapper, Holder =
boost::python::objects::value_holder<PythonWrapper>]'
/home/kstrauss/boost/boost_1_30_0/boost/python/object/make_instance.hpp:38:
  instantiated from `static PyObject* boost::
python::objects::make_instance_impl<T, Holder,
Derived>::execute(Arg&) [with Arg = const
boost::reference_wrapper<const P
ythonWrapper>, T = PythonWrapper, Holder =
boost::python::objects::value_holder<PythonWrapper>,
Derived = boost::python::
objects::make_instance<PythonWrapper,
boost::python::objects::value_holder<PythonWrapper>
>]'
/home/kstrauss/boost/boost_1_30_0/boost/python/object/class_wrapper.hpp:27:
  instantiated from `static PyObject* boost::
python::objects::class_cref_wrapper<Src,
MakeInstance>::convert(const Src&) [with Src =
PythonWrapper, MakeInstance = boo
st::python::objects::make_instance<PythonWrapper,
boost::python::objects::value_holder<PythonWrapper>
>]'
/home/kstrauss/boost/boost_1_30_0/boost/python/converter/as_to_python_function.hpp:31:
  instantiated from `static PyObje
ct* boost::python::converter::as_to_python_function<T,
ToPython>::convert(const void*) [with T =
PythonWrapper, ToPython 
=
boost::python::objects::class_cref_wrapper<PythonWrapper,
boost::python::objects::make_instance<PythonWrapper,
boost::p
ython::objects::value_holder<PythonWrapper> > >]'
/home/kstrauss/boost/boost_1_30_0/boost/python/to_python_converter.hpp:32:
  instantiated from `boost::python::to_python_
converter<T, Conversion>::to_python_converter() [with
T = PythonWrapper, Conversion =
boost::python::objects::class_cref_
wrapper<PythonWrapper,
boost::python::objects::make_instance<PythonWrapper,
boost::python::objects::value_holder<PythonWr
apper> > >]'
/home/kstrauss/boost/boost_1_30_0/boost/python/class.hpp:90:
  instantiated from `void
boost::python::detail::register_cl
ass_to_python(boost::mpl::bool_<true>, SelectHolder,
T*) [with T = PythonWrapper, SelectHolder =
boost::python::objects::
detail::select_value_holder<PythonWrapper,
PythonWrapper>]'
/home/kstrauss/boost/boost_1_30_0/boost/python/class.hpp:478:
  instantiated from `void boost::python::class_<T, X1,
X2, 
X3>::register_() const [with T = PythonWrapper, X1 =
boost::python::detail::not_specified, X2 =
boost::python::detail::no
t_specified, X3 =
boost::python::detail::not_specified]'
/home/kstrauss/boost/boost_1_30_0/boost/python/class.hpp:215:
  instantiated from `boost::python::class_<T, X1, X2,
X3>::
class_(const char*, const
boost::python::init_base<DerivedT>&) [with DerivedT =
boost::python::init<int, boost::mpl::void
_, boost::mpl::void_, boost::mpl::void_,
boost::mpl::void_, boost::mpl::void_,
boost::mpl::void_, boost::mpl::void_, boos
t::mpl::void_, boost::mpl::void_, boost::mpl::void_,
boost::mpl::void_, boost::mpl::void_,
boost::mpl::void_, boost::mpl:
:void_>, T = PythonWrapper, X1 =
boost::python::detail::not_specified, X2 =
boost::python::detail::not_specified, X3 = bo
ost::python::detail::not_specified]'
PrintFileStats/PythonWrapper.cpp:48:   instantiated
from here
/usr/local/gcc_3.2/include/c++/3.2.2/bits/ios_base.h:424:
`
   std::ios_base::ios_base(const std::ios_base&)' is
private
/home/kstrauss/boost/boost_1_30_0/boost/python/object/value_holder.hpp:111:
within
   this context
/usr/local/gcc_3.2/include/c++/3.2.2/streambuf: In
copy constructor 
   `std::basic_filebuf<char, std::char_traits<char>
>::basic_filebuf(const 
   std::basic_filebuf<char, std::char_traits<char>
>&)':
/usr/local/gcc_3.2/include/c++/3.2.2/streambuf:479: `
   std::basic_streambuf<_CharT,
_Traits>::basic_streambuf(const 
   std::basic_streambuf<_CharT, _Traits>&) [with
_CharT = char, _Traits = 
   std::char_traits<char>]' is private
/home/kstrauss/boost/boost_1_30_0/boost/python/object/value_holder.hpp:111:
within
   this context
make: *** [PythonWrapper.o] Error 1

Obviously I'm missing something in the overall concept
here. Anybody willing to give me a hand?

Thx

Karl


__________________________________
Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo.
http://search.yahoo.com