1 /*============================================================================= 2 Copyright (c) 2001-2011 Joel de Guzman 3 Copyright (c) 2005-2006 Dan Marsden 4 5 Distributed under the Boost Software License, Version 1.0. (See accompanying 6 file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 7 ==============================================================================*/ 8 #if !defined(BOOST_FUSION_EXAMPLE_STRUCT_ITERATOR) 9 #define BOOST_FUSION_EXAMPLE_STRUCT_ITERATOR 10 11 #include <boost/fusion/support/iterator_base.hpp> 12 #include <boost/fusion/support/category_of.hpp> 13 #include <boost/fusion/support/tag_of_fwd.hpp> 14 #include <boost/mpl/int.hpp> 15 #include <boost/type_traits/add_const.hpp> 16 #include <boost/static_assert.hpp> 17 18 #include "./detail/next_impl.hpp" 19 #include "./detail/prior_impl.hpp" 20 #include "./detail/deref_impl.hpp" 21 #include "./detail/advance_impl.hpp" 22 #include "./detail/distance_impl.hpp" 23 #include "./detail/value_of_impl.hpp" 24 #include "./detail/equal_to_impl.hpp" 25 #include "./detail/key_of_impl.hpp" 26 #include "./detail/value_of_data_impl.hpp" 27 #include "./detail/deref_data_impl.hpp" 28 29 namespace example 30 { 31 struct example_struct_iterator_tag; 32 33 template<typename Struct, int Pos> 34 struct example_struct_iterator; 35 } 36 37 namespace boost { namespace fusion { 38 39 namespace traits 40 { 41 template<typename Struct, int Pos> 42 struct tag_of<example::example_struct_iterator<Struct, Pos> > 43 { 44 typedef example::example_struct_iterator_tag type; 45 }; 46 } 47 }} 48 49 namespace example { 50 template<typename Struct, int Pos> 51 struct example_struct_iterator 52 : boost::fusion::iterator_base<example_struct_iterator<Struct, Pos> > 53 { 54 BOOST_STATIC_ASSERT(Pos >=0 && Pos < 3); 55 typedef Struct struct_type; 56 typedef boost::mpl::int_<Pos> index; 57 58 struct category 59 : boost::fusion::random_access_traversal_tag 60 , boost::fusion::associative_tag 61 {}; 62 example_struct_iteratorexample::example_struct_iterator63 example_struct_iterator(Struct& str) 64 : struct_(str) {} 65 66 Struct& struct_; 67 }; 68 } 69 70 #endif 71