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- // Copyright Louis Dionne 2013-2017
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
- #include <boost/hana/detail/variadic/drop_into.hpp>
- #include <boost/hana/assert.hpp>
- #include <boost/hana/equal.hpp>
- #include <laws/base.hpp>
- namespace hana = boost::hana;
- namespace vd = hana::detail::variadic;
- using hana::test::ct_eq;
- struct non_pod { virtual ~non_pod() { } };
- int main() {
- hana::test::_injection<0> f{};
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<0>(f)(),
- f()
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<0>(f)(ct_eq<0>{}),
- f(ct_eq<0>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<0>(f)(ct_eq<0>{}, ct_eq<1>{}),
- f(ct_eq<0>{}, ct_eq<1>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<0>(f)(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
- f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<1>(f)(ct_eq<0>{}),
- f()
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<1>(f)(ct_eq<0>{}, ct_eq<1>{}),
- f(ct_eq<1>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<1>(f)(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
- f(ct_eq<1>{}, ct_eq<2>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<1>(f)(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
- f(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<2>(f)(ct_eq<0>{}, ct_eq<1>{}),
- f()
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<2>(f)(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
- f(ct_eq<2>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<2>(f)(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
- f(ct_eq<2>{}, ct_eq<3>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- vd::drop_into<2>(f)(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
- f(ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{})
- ));
- // make sure we can use non-pods
- vd::drop_into<1>(f)(ct_eq<0>{}, non_pod{});
- vd::drop_into<1>(f)(non_pod{}, ct_eq<1>{});
- }
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