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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/python/test/input_iterator.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/boost/libs/python/test/input_iterator.cpp b/src/boost/libs/python/test/input_iterator.cpp new file mode 100644 index 000000000..70b994186 --- /dev/null +++ b/src/boost/libs/python/test/input_iterator.cpp @@ -0,0 +1,48 @@ +// 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" |