Troy
Thanks .. your hints are most helpful .. I'll be back :-)
Tim
On 13/01/2010 19:10, troy d. straszheim wrote:
Tim Couper wrote:
OK. Here's what I've been stuck with all today .. I have a 3rd party
C++ program function which returns a boost::variant (and its inverse)
my_variant my_variant_of_string(const std::string& str)
This one takes a string & returns a variant, and am trying to wrap
this in python, so that there I can have
>>> my_variant_of_string('hello')
'hello'
>>> my_variant_of_string('1.2')
1.2
>>> my_variant_of_string('10')
10
Simple, eh? ...
How about something like (not tested):
using boost::python::object;
typedef variant<...> variant_t;
variant_t makes_variant_from(string s); // defined elsewhere
//
// visitor for converting contents of visitor to object
//
struct vc : boost::static_visitor<object>
{
template <typename T>
object operator()(const T& v) const
{
return v;
}
};
bp::object
thunk(string s)
{
variant_t v = makes_variant_from(s);
return boost::apply_visitor(vc(), v);
}
BOOST_PYTHON_MODULE(mod)
{
def("f", &thunk);
}
You could probably use this to just register a converter from variant
to vanilla boost::python::object as well, if this is more convenient...
-t
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