| // 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/module.hpp> |
| #include <boost/python/def.hpp> |
| #include <boost/python/class.hpp> |
| #include <boost/python/iterator.hpp> |
| #include <boost/iterator/transform_iterator.hpp> |
| #include <list> |
| |
| using namespace boost::python; |
| |
| typedef std::list<int> list_int; |
| |
| // Prove that we can handle InputIterators which return rvalues. |
| struct doubler |
| { |
| typedef int result_type; |
| int operator()(int x) const { return x * 2; } |
| }; |
| |
| typedef boost::transform_iterator<doubler, list_int::iterator> doubling_iterator; |
| typedef std::pair<doubling_iterator,doubling_iterator> list_range2; |
| |
| list_range2 range2(list_int& x) |
| { |
| return list_range2( |
| boost::make_transform_iterator<doubler>(x.begin(), doubler()) |
| , boost::make_transform_iterator<doubler>(x.end(), doubler())); |
| } |
| |
| // We do this in a separate module from iterators_ext (iterators.cpp) |
| // to work around an MSVC6 linker bug, which causes it to complain |
| // about a "duplicate comdat" if the input iterator is instantiated in |
| // the same module with the others. |
| BOOST_PYTHON_MODULE(input_iterator) |
| { |
| def("range2", &::range2); |
| |
| class_<list_range2>("list_range2") |
| // We can wrap InputIterators which return by-value |
| .def("__iter__" |
| , range(&list_range2::first, &list_range2::second)) |
| ; |
| } |
| |
| #include "module_tail.cpp" |