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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 |