49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/python/module.hpp>
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#include <boost/python/def.hpp>
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#include <boost/python/class.hpp>
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#include <boost/python/iterator.hpp>
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#include <boost/iterator/transform_iterator.hpp>
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#include <list>
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using namespace boost::python;
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typedef std::list<int> list_int;
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// Prove that we can handle InputIterators which return rvalues.
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struct doubler
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{
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typedef int result_type;
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int operator()(int x) const { return x * 2; }
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};
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typedef boost::transform_iterator<doubler, list_int::iterator> doubling_iterator;
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typedef std::pair<doubling_iterator,doubling_iterator> list_range2;
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list_range2 range2(list_int& x)
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{
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return list_range2(
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boost::make_transform_iterator<doubler>(x.begin(), doubler())
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, boost::make_transform_iterator<doubler>(x.end(), doubler()));
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}
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// We do this in a separate module from iterators_ext (iterators.cpp)
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// to work around an MSVC6 linker bug, which causes it to complain
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// about a "duplicate comdat" if the input iterator is instantiated in
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// the same module with the others.
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BOOST_PYTHON_MODULE(input_iterator)
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{
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def("range2", &::range2);
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class_<list_range2>("list_range2")
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// We can wrap InputIterators which return by-value
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.def("__iter__"
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, range(&list_range2::first, &list_range2::second))
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;
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}
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#include "module_tail.cpp"
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