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 { stl_input_iteratorboost::python::stl_input_iterator27 stl_input_iterator() 28 : impl_() 29 { 30 } 31 32 // ob is the python sequence stl_input_iteratorboost::python::stl_input_iterator33 stl_input_iterator(boost::python::object const &ob) 34 : impl_(ob) 35 { 36 } 37 38 private: 39 friend class boost::iterator_core_access; 40 incrementboost::python::stl_input_iterator41 void increment() 42 { 43 this->impl_.increment(); 44 } 45 dereferenceboost::python::stl_input_iterator46 ValueT dereference() const 47 { 48 return extract<ValueT>(this->impl_.current().get())(); 49 } 50 equalboost::python::stl_input_iterator51 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