65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
// Copyright Louis Dionne 2013-2017
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/assert.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/functional/demux.hpp>
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#include <laws/base.hpp>
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namespace hana = boost::hana;
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using hana::test::ct_eq;
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struct MoveOnly {
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MoveOnly() = default;
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MoveOnly(MoveOnly const&) = delete;
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MoveOnly(MoveOnly&&) = default;
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};
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int main() {
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hana::test::_injection<0> f{};
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hana::test::_injection<1> g{};
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hana::test::_injection<2> h{};
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::demux(f)()(),
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f()
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::demux(f)(g)(ct_eq<1>{}),
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f(g(ct_eq<1>{}))
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::demux(f)(g)(ct_eq<1>{}, ct_eq<2>{}),
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f(g(ct_eq<1>{}, ct_eq<2>{}))
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::demux(f)(g)(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
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f(g(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}))
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::demux(f)(g, h)(ct_eq<1>{}),
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f(g(ct_eq<1>{}), h(ct_eq<1>{}))
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::demux(f)(g, h)(ct_eq<1>{}, ct_eq<2>{}),
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f(g(ct_eq<1>{}, ct_eq<2>{}), h(ct_eq<1>{}, ct_eq<2>{}))
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::demux(f)(g, h)(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
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f(g(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}), h(ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}))
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));
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// Make sure we can pass move-only types when a single function
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// is demux'ed. In other words, make sure the arguments are
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// perfect-forwarded when a single function is demux'ed.
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{
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hana::demux(f)(g)(MoveOnly{});
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hana::demux(f)(g)(MoveOnly{}, MoveOnly{});
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hana::demux(f)(g)(MoveOnly{}, MoveOnly{}, MoveOnly{});
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}
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}
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