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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/assert.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/functional/demux.hpp>
- #include <laws/base.hpp>
- namespace hana = boost::hana;
- using hana::test::ct_eq;
- struct MoveOnly {
- MoveOnly() = default;
- MoveOnly(MoveOnly const&) = delete;
- MoveOnly(MoveOnly&&) = default;
- };
- int main() {
- hana::test::_injection<0> f{};
- hana::test::_injection<1> g{};
- hana::test::_injection<2> h{};
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::demux(f)()(),
- f()
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::demux(f)(g)(ct_eq<1>{}),
- f(g(ct_eq<1>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::demux(f)(g)(ct_eq<1>{}, ct_eq<2>{}),
- f(g(ct_eq<1>{}, ct_eq<2>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::demux(f)(g)(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
- f(g(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::demux(f)(g, h)(ct_eq<1>{}),
- f(g(ct_eq<1>{}), h(ct_eq<1>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::demux(f)(g, h)(ct_eq<1>{}, ct_eq<2>{}),
- f(g(ct_eq<1>{}, ct_eq<2>{}), h(ct_eq<1>{}, ct_eq<2>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::demux(f)(g, h)(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
- f(g(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}), h(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}))
- ));
- // Make sure we can pass move-only types when a single function
- // is demux'ed. In other words, make sure the arguments are
- // perfect-forwarded when a single function is demux'ed.
- {
- hana::demux(f)(g)(MoveOnly{});
- hana::demux(f)(g)(MoveOnly{}, MoveOnly{});
- hana::demux(f)(g)(MoveOnly{}, MoveOnly{}, MoveOnly{});
- }
- }
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