I'm trying to wrap a whole C++ that contains a lot of access to std::vector and
std::map.
I managed to wrap vectors but i've got problems with maps.
The following simple example fails to compile with the error:
error: no match for call to ‘(const
boost::python::detail::specify_a_return_value_policy_to_wrap_functions_returning<X*>)
(X*)‘
====================================================
#include <boost/python.hpp>
#include <boost/python/suite/indexing/vector_indexing_suite.hpp>
#include <boost/python/suite/indexing/map_indexing_suite.hpp>
using namespace boost::python;
class X {
public:
X(std::string s): _s(s) {}
std::string const repr() { return _s; }
private:
std::string _s;
};
class Y {
public:
Y(): _vec(), _map() {};
void addToVec(X* x) { _vec.push_back(x); }
void addToMap(int i, X* x) { _map[i] = x; }
const std::vector<X*>& getXVec() { return _vec; }
const std::map<int, X*>& getXMap() { return _map; }
private:
std::vector<X*> _vec;
std::map<int, X*> _map;
};
BOOST_PYTHON_MODULE(pyTEST) {
class_<X, X*>("X", init<std::string>())
.def("__repr__", &X::repr)
;
class_<std::vector<X*> >("XVec")
.def(vector_indexing_suite<std::vector<X*>, true>())
;
class_<std::map<int, X*> >("XMap")
.def(map_indexing_suite<std::map<int, X*>, true>())
;
class_<Y>("Y", init<>())
.def("addToVec", &Y::addToVec)
.def("addToMap", &Y::addToMap)
.def("getXVec" , &Y::getXVec , return_internal_reference<>())
.def("getXMap" , &Y::getXMap , return_internal_reference<>())
;
}
====================================================
I tried to use boost::shared_ptr<X> instead of X* in this small example and it
works, but I would like not to have to correct all my existing C++ code to use
boost::shared_ptr.
And since it works well with std::vector<X*>, I think it should work with maps.
Some google search make me think I should add a return_value_policy to the
__getitem__ method of std::map<int, X*> class, but when I try I get the error
error: address of overloaded function with no contextual type information
I'm clearly doing something wrong here.
Thanks for any help/advice.
FYI: I'm using boost 1.42.0, with g++ 4.2.1 on snow leopard (10.6.3)
-------------------------------
Damien Dupuis
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