[C++-sig] class_::add_property flexiablity No. 2

[Jeff Holle]

I'm using gcc 3.2 and boost 1.29.0 on Mandrake Linux 9.0.

I'm attempting to employ Boost.Python to wrap an accessor method that returns a reference employing the class_.add_property method.

The following C++ code compiles and links without error:


    #include <boost/python/module.hpp>
    #include <boost/python/def.hpp>
    #include <boost/python/class.hpp>
    #include <boost/python/copy_const_reference.hpp>
    #include <string>

    using namespace boost::python;

    class Widget {
    public:
        Widget() : m_Name("Initial Value") {;}
        const std::string& getName(void) const { return m_Name;}
    private:
        std::string m_Name;
    };


    BOOST_PYTHON_MODULE(TestAddProperty)
    {
         class_<Widget>("Widget")
            .add_property("Name",make_function(&Widget::getName,
    return_value_policy<copy_const_reference>()));
    }

It does not work however.  The following are two python scripts that 
demonstrates this.

    import TestAddProperty
    widget = TestAddProperty.Widget
    print widget.Name

Prints "<property object at 0x8059174>"  If it worked I'd expect it to 
print "Initial Value".

    import TestAddProperty
    widget = TestAddProperty.Widget
    widget.Name = "This is a test"
    print widget.Name

This prints "This is a test".  If it worked, I'd expect a run-time error 
executing line number 3 because I have not exposed a mutator in the 
TestAddProperty module.