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- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- Copyright (c) 2011 Eric Niebler
- 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 <sstream>
- #include <boost/detail/lightweight_test.hpp>
- #include <boost/fusion/algorithm/iteration/for_each.hpp>
- #include <boost/fusion/algorithm/query/find_if.hpp>
- #include <boost/fusion/container/vector/vector.hpp>
- #include <boost/fusion/container/generation/make_vector.hpp>
- #include <boost/fusion/view/iterator_range/iterator_range.hpp>
- #include <boost/fusion/sequence/comparison/equal_to.hpp>
- #include <boost/fusion/sequence/io/out.hpp>
- #include <boost/fusion/sequence/intrinsic/size.hpp>
- #include <boost/mpl/vector_c.hpp>
- #include <boost/mpl/begin.hpp>
- #include <boost/mpl/next.hpp>
- #include <boost/static_assert.hpp>
- #include "tree.hpp"
- struct ostream_fun
- {
- ostream_fun(std::ostream &sout)
- : sout_(sout)
- {}
- template<typename T>
- void operator ()(T const &t) const
- {
- sout_ << t << ' ';
- }
- private:
- std::ostream & sout_;
- };
- template<typename Tree>
- void
- process_tree(Tree const &tree)
- {
- using namespace boost;
- using namespace fusion;
- using mpl::_;
- typedef typename boost::fusion::result_of::find_if<Tree const, is_same<_,short> >::type short_iter;
- typedef typename boost::fusion::result_of::find_if<Tree const, is_same<_,float> >::type float_iter;
- typedef iterator_range<short_iter, float_iter> slice_t;
- BOOST_STATIC_ASSERT(traits::is_segmented<slice_t>::value);
- // find_if of a segmented data structure returns generic
- // segmented iterators
- short_iter si = find_if<is_same<_,short> >(tree);
- float_iter fi = find_if<is_same<_,float> >(tree);
- // If you put them in an iterator range, the range
- // is automatically a segmented data structure.
- slice_t slice(si, fi);
- std::stringstream sout;
- fusion::for_each(slice, ostream_fun(sout));
- BOOST_TEST((sout.str() == "100 e f 0 B "));
- }
- int
- main()
- {
- using namespace boost::fusion;
- std::cout << tuple_open('[');
- std::cout << tuple_close(']');
- std::cout << tuple_delimiter(", ");
- {
- char const* s = "Ruby";
- typedef vector<int, char, double, char const*> vector_type;
- vector_type vec(1, 'x', 3.3, s);
- {
- typedef vector_iterator<vector_type, 1> i1t;
- typedef vector_iterator<vector_type, 3> i3t;
- i1t i1(vec);
- i3t i3(vec);
- typedef iterator_range<i1t, i3t> slice_t;
- slice_t slice(i1, i3);
- std::cout << slice << std::endl;
- BOOST_TEST((slice == make_vector('x', 3.3)));
- BOOST_STATIC_ASSERT(boost::fusion::result_of::size<slice_t>::value == 2);
- }
- {
- typedef vector_iterator<vector_type, 0> i1t;
- typedef vector_iterator<vector_type, 0> i3t;
- i1t i1(vec);
- i3t i3(vec);
- typedef iterator_range<i1t, i3t> slice_t;
- slice_t slice(i1, i3);
- std::cout << slice << std::endl;
- BOOST_TEST(slice == make_vector());
- BOOST_STATIC_ASSERT(boost::fusion::result_of::size<slice_t>::value == 0);
- }
- }
- {
- typedef boost::mpl::vector_c<int, 2, 3, 4, 5, 6> mpl_vec;
- typedef boost::mpl::begin<mpl_vec>::type it0;
- typedef boost::mpl::next<it0>::type it1;
- typedef boost::mpl::next<it1>::type it2;
- typedef boost::mpl::next<it2>::type it3;
- it1 f;
- it3 l;
-
- typedef iterator_range<it1, it3> slice_t;
- slice_t slice(f, l);
- std::cout << slice << std::endl;
- BOOST_TEST((slice == make_vector(3, 4)));
- BOOST_STATIC_ASSERT(boost::fusion::result_of::size<slice_t>::value == 2);
- }
- {
- process_tree(
- make_tree(
- make_vector(double(0),'B')
- , make_tree(
- make_vector(1,2,long(3))
- , make_tree(make_vector('a','b','c'))
- , make_tree(make_vector(short('d'),'e','f'))
- )
- , make_tree(
- make_vector(4,5,6)
- , make_tree(make_vector(float(1),'h','i'))
- , make_tree(make_vector('j','k','l'))
- )
- )
- );
- }
- return boost::report_errors();
- }
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