The following example demonstrates a method of using add_property that
works with Boost.Python 1.30 but not CVS-HEAD (from sourceforge CVS).
The example posted is somewhat useless as-is, but demonstrates something
that I started using for properties with non-trivial accessors.
Is there a replacement for this functionality?
Thanks,
Jonathan Brandmeyer
--------------------------------------------------------------
#include <boost/python.hpp>
namespace test {
// Hmm. return_internal_reference<>() wants to wrap a real class.
class ret_type
{
public:
double i;
};
class crash_me
{
private:
ret_type i;
public:
ret_type& get_i() { return i; }
};
}
BOOST_PYTHON_MODULE( crash_test)
{
using namespace boost::python;
class_< test::ret_type>( "ret_type")
.def_readwrite( "i", &test::ret_type::i)
;
class_< test::crash_me> crash_me_wrapper( "crash_me");
crash_me_wrapper
.def( "get_i", &test::crash_me::get_i , return_internal_reference<>())
;
// The following works under Boost 1.30, but not CVS-HEAD
// (sourceforge repository).
crash_me_wrapper.add_property( "i", crash_me_wrapper.attr("get_i"));
}
--------------------------------------------------------
Testing with G++ 3.3.2 (Debian) results in the following error using
CVS-HEAD:
/home/jonathan/src/boost-CVS-HEAD/boost/boost/python/class.hpp: In
member
function `boost::python::api::object boost::python::class_<T, X1, X2,
X3>::make_fn(const F&) [with F =
boost::python::api::proxy<boost::python::api::attribute_policies>, T
=
test::crash_me, X1 = boost::python::detail::not_specified, X2 =
boost::python::detail::not_specified, X3 =
boost::python::detail::not_specified]':
/home/jonathan/src/boost-CVS-HEAD/boost/boost/python/class.hpp:365:
instantiated from `boost::python::class_<T, X1, X2, X3>&
boost::python::class_<T, X1, X2, X3>::add_property(const char*, Get)
[with Get =
boost::python::api::proxy<boost::python::api::attribute_policies>, T =
test::crash_me, X1 = boost::python::detail::not_specified, X2 =
boost::python::detail::not_specified, X3 =
boost::python::detail::not_specified]'
crashme.cpp:38: instantiated from here
/home/jonathan/src/boost-CVS-HEAD/boost/boost/python/class.hpp:429:
error: no
matching function for call to `get_signature(const
boost::python::api::proxy<boost::python::api::attribute_policies>&,
test::crash_me*)'
