[C++-sig] Re: injected constructors

[Gideon May]

Dave,

--On Sunday, September 21, 2003 11:18 AM -0400 David Abrahams 
<dave at boost-consulting.com> wrote:
> The code snippet is missing the definitions of classes, etc.  Can't
> you produce a minimal test case?  I don't even see make_constructor
> in here.

I just realized that I compiled with warning level 3. The warning doesn't
show up with the default warning level. I've created a simple (contrived) 
test case which
shows the warning :

-----------------------------------------------
#include <boost/python/module.hpp>
#include <boost/python/def.hpp>
#include <boost/python/return_internal_reference.hpp>
#include <boost/python/class.hpp>

using namespace boost::python;

struct Vec3
{
};

struct Bound
{
    Vec3& getVec() { return _vec; }

  protected:
    Vec3    _vec;
};

BOOST_PYTHON_MODULE(test_internal_reference)
{
    class_<Vec3>("Vec3");

    class_<Bound>("Bound")
        .def("getVec", &Bound::getVec, return_internal_reference<>())
        ;
}

#include "module_tail.cpp"
---------------------------------------------------------


This is the entry in the test/Jamfile :

--------------------------------------------------------
bpl-test internal_reference
  :
  :
      <vc7><release><cxxflags>"-W3 -EHa"
  ;
--------------------------------------------------------

Ciao,

Gideon