13     BOOST_HOF_TEST_CHECK(3 == boost::hof::flip(boost::hof::_ - boost::hof::_)(2, 5));  in BOOST_HOF_TEST_CASE()
14     BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::flip(boost::hof::_ - boost::hof::_)(2, 5));  in BOOST_HOF_TEST_CASE()
22     BOOST_HOF_TEST_CHECK(1 == boost::hof::arg(one{})(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
23     BOOST_HOF_STATIC_TEST_CHECK(1 == boost::hof::arg(one{})(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
24     BOOST_HOF_TEST_CHECK(2 == boost::hof::flip(boost::hof::arg(one{}))(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
25     BOOST_HOF_STATIC_TEST_CHECK(2 == boost::hof::flip(boost::hof::arg(one{}))(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
27     BOOST_HOF_TEST_CHECK(2 == boost::hof::arg(two{})(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
28     BOOST_HOF_STATIC_TEST_CHECK(2 == boost::hof::arg(two{})(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
29     BOOST_HOF_TEST_CHECK(1 == boost::hof::flip(boost::hof::arg(two{}))(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
30     BOOST_HOF_STATIC_TEST_CHECK(1 == boost::hof::flip(boost::hof::arg(two{}))(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
32     BOOST_HOF_TEST_CHECK(3 == boost::hof::arg(three{})(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
33     BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::arg(three{})(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
34     BOOST_HOF_TEST_CHECK(3 == boost::hof::flip(boost::hof::arg(three{}))(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
35     BOOST_HOF_STATIC_TEST_CHECK(3 == boost::hof::flip(boost::hof::arg(three{}))(1, 2, 3, 4));  in BOOST_HOF_TEST_CASE()
54     static_assert(boost::hof::flip(boost::hof::_ - boost::hof::_)(2, 5), "noexcept flip");  in BOOST_HOF_TEST_CASE()
60     BOOST_HOF_TEST_CHECK(boost::hof::flip(f())(nullptr, 2) == 2);  in BOOST_HOF_TEST_CASE()