| 1 | /////////////////////////////////////////////////////////////////////////////// |
|---|---|
| 2 | // new_switch.cpp |
| 3 | // |
| 4 | // Copyright 2011 Eric Niebler |
| 5 | // Copyright Pierre Esterie & Joel Falcou. |
| 6 | // Distributed under the Boost |
| 7 | // Software License, Version 1.0. (See accompanying file |
| 8 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 9 | |
| 10 | #include <boost/proto/core.hpp> |
| 11 | #include <boost/proto/transform.hpp> |
| 12 | #include <boost/detail/workaround.hpp> |
| 13 | #include <boost/proto/debug.hpp> |
| 14 | #include <boost/test/unit_test.hpp> |
| 15 | #include <boost/mpl/long.hpp> |
| 16 | #include <boost/mpl/bool.hpp> |
| 17 | |
| 18 | namespace proto = boost::proto; |
| 19 | |
| 20 | struct MyCases |
| 21 | { |
| 22 | template<typename Tag> |
| 23 | struct case_ |
| 24 | : proto::not_<proto::_> |
| 25 | {}; |
| 26 | }; |
| 27 | |
| 28 | template<> |
| 29 | struct MyCases::case_<proto::tag::shift_right> |
| 30 | : proto::_ |
| 31 | {}; |
| 32 | |
| 33 | template<> |
| 34 | struct MyCases::case_<proto::tag::plus> |
| 35 | : proto::_ |
| 36 | {}; |
| 37 | |
| 38 | struct ArityOf; |
| 39 | |
| 40 | struct ArityOfCases |
| 41 | { |
| 42 | template<typename ArityOf> |
| 43 | struct case_ |
| 44 | : proto::not_<proto::_> |
| 45 | {}; |
| 46 | }; |
| 47 | |
| 48 | |
| 49 | template<> |
| 50 | struct ArityOfCases::case_<boost::mpl::long_<1> > |
| 51 | : boost::proto::when<boost::proto::_, boost::mpl::false_()> |
| 52 | {}; |
| 53 | |
| 54 | template<> |
| 55 | struct ArityOfCases::case_<boost::mpl::long_<2> > |
| 56 | : boost::proto::when<boost::proto::_, boost::mpl::true_()> |
| 57 | {}; |
| 58 | |
| 59 | struct ArityOf |
| 60 | : boost::proto::switch_< |
| 61 | ArityOfCases |
| 62 | , proto::arity_of<proto::_>() |
| 63 | > |
| 64 | {}; |
| 65 | |
| 66 | void test_switch() |
| 67 | { |
| 68 | // Tests for backward compatibility |
| 69 | proto::assert_matches<proto::switch_<MyCases> >(proto::lit(t: 1) >> 'a'); |
| 70 | proto::assert_matches<proto::switch_<MyCases> >(proto::lit(t: 1) + 'a'); |
| 71 | proto::assert_matches_not<proto::switch_<MyCases> >(proto::lit(t: 1) << 'a'); |
| 72 | |
| 73 | //Test new matching on the Transform result type |
| 74 | ArityOf ar; |
| 75 | |
| 76 | proto::assert_matches_not<ArityOf>(proto::lit(t: 1)); |
| 77 | proto::assert_matches<ArityOf>(proto::lit(t: 1) + 2); |
| 78 | proto::assert_matches<ArityOf>(!proto::lit(t: 1)); |
| 79 | BOOST_CHECK_EQUAL(ar(!proto::lit(1)), false); |
| 80 | BOOST_CHECK_EQUAL(ar(proto::lit(1) + 2), true); |
| 81 | } |
| 82 | |
| 83 | using namespace boost::unit_test; |
| 84 | /////////////////////////////////////////////////////////////////////////////// |
| 85 | // init_unit_test_suite |
| 86 | // |
| 87 | test_suite* init_unit_test_suite(int argc, char* argv[]) |
| 88 | { |
| 89 | test_suite *test = BOOST_TEST_SUITE("test proto::switch_<>"); |
| 90 | |
| 91 | test->add(BOOST_TEST_CASE(&test_switch)); |
| 92 | |
| 93 | return test; |
| 94 | } |
| 95 | |
| 96 |