| 1 | // Copyright Eric Niebler 2005. |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. (See |
| 3 | // accompanying file LICENSE_1_0.txt or copy at |
| 4 | // http://www.boost.org/LICENSE_1_0.txt) |
| 5 | #ifndef STL_ITERATOR_EAN20051028_HPP |
| 6 | # define STL_ITERATOR_EAN20051028_HPP |
| 7 | |
| 8 | # include <boost/python/detail/prefix.hpp> |
| 9 | |
| 10 | # include <boost/python/object/stl_iterator_core.hpp> |
| 11 | |
| 12 | # include <boost/iterator/iterator_facade.hpp> |
| 13 | |
| 14 | namespace boost { namespace python |
| 15 | { |
| 16 | |
| 17 | // An STL input iterator over a python sequence |
| 18 | template<typename ValueT> |
| 19 | struct stl_input_iterator |
| 20 | : boost::iterator_facade< |
| 21 | stl_input_iterator<ValueT> |
| 22 | , ValueT |
| 23 | , std::input_iterator_tag |
| 24 | , ValueT |
| 25 | > |
| 26 | { |
| 27 | stl_input_iterator() |
| 28 | : impl_() |
| 29 | { |
| 30 | } |
| 31 | |
| 32 | // ob is the python sequence |
| 33 | stl_input_iterator(boost::python::object const &ob) |
| 34 | : impl_(ob) |
| 35 | { |
| 36 | } |
| 37 | |
| 38 | private: |
| 39 | friend class boost::iterator_core_access; |
| 40 | |
| 41 | void increment() |
| 42 | { |
| 43 | this->impl_.increment(); |
| 44 | } |
| 45 | |
| 46 | ValueT dereference() const |
| 47 | { |
| 48 | return extract<ValueT>(this->impl_.current().get())(); |
| 49 | } |
| 50 | |
| 51 | bool equal(stl_input_iterator<ValueT> const &that) const |
| 52 | { |
| 53 | return this->impl_.equal(that.impl_); |
| 54 | } |
| 55 | |
| 56 | objects::stl_input_iterator_impl impl_; |
| 57 | }; |
| 58 | |
| 59 | }} // namespace boost::python |
| 60 | |
| 61 | #endif // STL_ITERATOR_EAN20051028_HPP |
| 62 |