94 lines
3.4 KiB
C++
94 lines
3.4 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Joel de Guzman
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Copyright (c) 2011 Eric Niebler
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#include <boost/detail/lightweight_test.hpp>
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#include <boost/fusion/sequence/io/out.hpp>
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#include <boost/fusion/view/single_view/single_view.hpp>
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#include <boost/fusion/sequence/intrinsic/at.hpp>
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#include <boost/fusion/sequence/intrinsic/begin.hpp>
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#include <boost/fusion/sequence/intrinsic/end.hpp>
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#include <boost/fusion/sequence/intrinsic/size.hpp>
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#include <boost/fusion/sequence/intrinsic/front.hpp>
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#include <boost/fusion/sequence/intrinsic/back.hpp>
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#include <boost/fusion/sequence/intrinsic/empty.hpp>
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#include <boost/fusion/sequence/intrinsic/value_at.hpp>
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#include <boost/fusion/iterator/next.hpp>
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#include <boost/fusion/iterator/prior.hpp>
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#include <boost/fusion/iterator/deref.hpp>
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#include <boost/fusion/iterator/advance.hpp>
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#include <boost/fusion/iterator/distance.hpp>
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#include <boost/mpl/int.hpp>
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#include <boost/mpl/assert.hpp>
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#include <boost/type_traits/is_same.hpp>
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struct X {};
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template <typename OS>
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OS& operator<<(OS& os, X const&)
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{
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os << "<X-object>";
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return os;
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}
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void foo() {}
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int
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main()
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{
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using namespace boost::fusion;
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std::cout << tuple_open('[');
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std::cout << tuple_close(']');
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std::cout << tuple_delimiter(", ");
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{
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single_view<int> view1(3);
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std::cout << view1 << std::endl;
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#ifdef FUSION_TEST_FAIL
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// single_view is immutable
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*begin(view1) += 4;
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#endif
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std::cout << view1 << std::endl;
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BOOST_TEST(*begin(view1) == 3);
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BOOST_TEST(at<boost::mpl::int_<0> >(view1) == 3);
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BOOST_TEST(view1.val == 3);
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BOOST_TEST(3 == front(view1));
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BOOST_TEST(3 == back(view1));
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BOOST_TEST(!empty(view1));
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BOOST_TEST(next(begin(view1)) == end(view1));
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BOOST_TEST(prior(end(view1)) == begin(view1));
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BOOST_TEST(!(next(begin(view1)) != end(view1)));
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BOOST_TEST(!(prior(end(view1)) != begin(view1)));
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BOOST_TEST(1 == distance(begin(view1), end(view1)));
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BOOST_TEST(0 == distance(end(view1), end(view1)));
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BOOST_TEST(0 == distance(begin(view1), begin(view1)));
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BOOST_TEST(end(view1) == advance<boost::mpl::int_<1> >(begin(view1)));
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BOOST_TEST(begin(view1) == advance<boost::mpl::int_<0> >(begin(view1)));
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BOOST_TEST(end(view1) == advance<boost::mpl::int_<0> >(end(view1)));
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BOOST_TEST(begin(view1) == advance<boost::mpl::int_<-1> >(end(view1)));
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BOOST_TEST(end(view1) == advance_c<1>(begin(view1)));
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BOOST_TEST(begin(view1) == advance_c<0>(begin(view1)));
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BOOST_TEST(end(view1) == advance_c<0>(end(view1)));
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BOOST_TEST(begin(view1) == advance_c<-1>(end(view1)));
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BOOST_TEST(1 == size(view1));
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BOOST_MPL_ASSERT((boost::is_same<int, boost::fusion::result_of::value_at<single_view<int>, boost::mpl::int_<0> >::type>));
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single_view<X> view2;
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std::cout << view2 << std::endl;
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}
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{
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std::cout << make_single_view(1) << std::endl;
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std::cout << make_single_view("Hello, World") << std::endl;
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std::cout << make_single_view(&foo) << std::endl;
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}
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return boost::report_errors();
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}
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