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February 2017

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where does bjam look for header files
by B Ku Feb. 14, 2017

Feb. 14, 2017

Hi Guys, I'm trying to get Boost Python working for a work project. I followed the steps detailed here: http://stackoverflow.com/questions/20093331/cant-run-bjam-to-compile-boost-… When I issued the bjam command in the boost_1_63_0\libs\python\example\tutorial directory, I get the following error: hello.cpp(7) : fatal error C1083: Cannot open include file: 'boost/python/module.hpp': No such file or directory Where does bjam look for c++ headers? Thank you for your help in advance! Thanks, B

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[Boost::Python] vector_indexing_suite fails to recognize type as registered
by Eugenio Bargiacchi Feb. 12, 2017

Feb. 12, 2017

In the below C++ code, even though the type std::tuple<int> is registered, boost::python fails to find that out when the tuple is within an std::vector exposed through the vector_indexing suite. At the same time, it is possible to reference and use the type normally as long as it's not in the vector. For example, this happens: >>> print makeMyTuple() (0,) >>> print makeTuples()[0] Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: No Python class registered for C++ class std::tuple<int> >>> Is there any way to make this work? Best, Eugenio MVE: #include <tuple> #include <vector> #include <boost/python.hpp> #include <boost/python/suite/indexing/vector_indexing_suite.hpp> template <typename T> struct TupleToPython { TupleToPython() { boost::python::to_python_converter<T, TupleToPython<T>>(); } template<int...> struct sequence {}; template<int N, int... S> struct generator : generator<N-1, N-1, S...> { }; template<int... S> struct generator<0, S...> { using type = sequence<S...>; }; template <int... I> static boost::python::tuple boostConvertImpl(const T& t, sequence<I...>) { return boost::python::make_tuple(std::get<I>(t)...); } template <typename... Args> static boost::python::tuple boostConvert(const std::tuple<Args...> & t) { return boostConvertImpl(t, typename generator<sizeof...(Args)>::type()); } static PyObject* convert(const T& t) { return boost::python::incref(boostConvert(t).ptr()); } }; using MyTuple = std::tuple<int>; using Tuples = std::vector<MyTuple>; MyTuple makeMyTuple() { return MyTuple(); } Tuples makeTuples() { return Tuples{MyTuple()}; } BOOST_PYTHON_MODULE(h) { using namespace boost::python; TupleToPython<MyTuple>(); def("makeMyTuple", makeMyTuple); class_<std::vector<MyTuple>>{"Tuples"} .def(vector_indexing_suite<std::vector<MyTuple>>()); def("makeTuples", makeTuples); }

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