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- // Copyright David Abrahams 2002.
- // Distributed under the Boost Software License, Version 1.0. (See
- // accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #include <boost/python/extract.hpp>
- #include <boost/python/list.hpp>
- #include <boost/python/module.hpp>
- #include <boost/python/def.hpp>
- #include <boost/python/class.hpp>
- #include <boost/python/reference_existing_object.hpp>
- #include <boost/python/return_value_policy.hpp>
- #include <boost/python/implicit.hpp>
- #include <string>
- #include <boost/lexical_cast.hpp>
- #define BOOST_ENABLE_ASSERT_HANDLER
- #include <boost/assert.hpp>
- #include "test_class.hpp"
- using namespace boost::python;
- typedef test_class<> X;
- bool extract_bool(object x) { return extract<bool>(x); }
- boost::python::list extract_list(object x)
- {
- extract<list> get_list((x));
- // Make sure we always have the right idea about whether it's a list
- bool is_list_1 = get_list.check();
- bool is_list_2 = PyObject_IsInstance(x.ptr(), (PyObject*)&PyList_Type);
- if (is_list_1 != is_list_2) {
- throw std::runtime_error("is_list_1 == is_list_2 failure.");
- }
- return get_list();
- }
- char const* extract_cstring(object x)
- {
- return extract<char const*>(x);
- }
- std::string extract_string(object x)
- {
- std::string s = extract<std::string>(x);
- return s;
- }
- std::string const& extract_string_cref(object x)
- {
- #if defined(BOOST_MSVC) && BOOST_MSVC <= 1300
- # pragma warning(push)
- # pragma warning(disable:4172) // msvc lies about returning a reference to temporary
- #elif defined(_MSC_VER) && defined(__ICL) && __ICL <= 900
- # pragma warning(push)
- # pragma warning(disable:473) // intel/win32 does too
- #endif
-
- return extract<std::string const&>(x);
-
- #if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 || defined(_MSC_VER) && defined(__ICL) && __ICL <= 800
- # pragma warning(pop)
- #endif
- }
- X extract_X(object x)
- {
- return extract<X>(x);
- }
- X* extract_X_ptr(object x) { return extract<X*>(x); }
- X& extract_X_ref(object x)
- {
- extract<X&> get_x(x);
- return get_x;
- }
- int double_X(object n)
- {
- extract<X> x(n);
- return x().value() + x().value();
- }
- bool check_bool(object x) { return extract<bool>(x).check(); }
- bool check_list(object x) { return extract<list>(x).check(); }
- bool check_cstring(object x) { return extract<char const*>(x).check(); }
- bool check_string(object x) { return extract<std::string>(x).check(); }
- bool check_string_cref(object x) { return extract<std::string const&>(x).check(); }
- bool check_X(object x) { return extract<X>(x).check(); }
- bool check_X_ptr(object x) { return extract<X*>(x).check(); }
- bool check_X_ref(object x) { return extract<X&>(x).check(); }
- std::string x_rep(X const& x)
- {
- return "X(" + boost::lexical_cast<std::string>(x.value()) + ")";
- }
- BOOST_PYTHON_MODULE(extract_ext)
- {
- implicitly_convertible<int, X>();
- def("extract_bool", extract_bool);
- def("extract_list", extract_list);
- def("extract_cstring", extract_cstring);
- def("extract_string", extract_string);
- def("extract_string_cref", extract_string_cref, return_value_policy<reference_existing_object>());
- def("extract_X", extract_X);
- def("extract_X_ptr", extract_X_ptr, return_value_policy<reference_existing_object>());
- def("extract_X_ref", extract_X_ref, return_value_policy<reference_existing_object>());
- def("check_bool", check_bool);
- def("check_list", check_list);
- def("check_cstring", check_cstring);
- def("check_string", check_string);
- def("check_string_cref", check_string_cref);
- def("check_X", check_X);
- def("check_X_ptr", check_X_ptr);
- def("check_X_ref", check_X_ref);
- def("double_X", double_X);
- def("count_Xs", &X::count);
- ;
- object x_class(
- class_<X>("X", init<int>())
- .def( "__repr__", x_rep));
-
- // Instantiate an X object through the Python interface
- object x_obj = x_class(3);
- // Get the C++ object out of the Python object
- X const& x = extract<X&>(x_obj);
- if (x.value() != 3) {
- throw std::runtime_error("x.value() == 3 failure.");
- }
- }
- #include "module_tail.cpp"
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