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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/core/make.hpp>
- #include <boost/hana/first.hpp>
- #include <boost/hana/pair.hpp>
- #include <boost/hana/second.hpp>
- namespace hana = boost::hana;
- struct MoveOnly {
- int data_;
- MoveOnly(MoveOnly const&) = delete;
- MoveOnly& operator=(MoveOnly const&) = delete;
- MoveOnly(int data) : data_(data) { }
- MoveOnly(MoveOnly&& x) : data_(x.data_) { x.data_ = 0; }
- MoveOnly& operator=(MoveOnly&& x)
- { data_ = x.data_; x.data_ = 0; return *this; }
- bool operator==(const MoveOnly& x) const { return data_ == x.data_; }
- };
- int main() {
- {
- hana::pair<int, short> p = hana::make_pair(3, 4);
- BOOST_HANA_RUNTIME_CHECK(hana::first(p) == 3);
- BOOST_HANA_RUNTIME_CHECK(hana::second(p) == 4);
- }
- {
- hana::pair<MoveOnly, short> p = hana::make_pair(MoveOnly{3}, 4);
- BOOST_HANA_RUNTIME_CHECK(hana::first(p) == MoveOnly{3});
- BOOST_HANA_RUNTIME_CHECK(hana::second(p) == 4);
- }
- {
- hana::pair<MoveOnly, short> p = hana::make_pair(3, 4);
- BOOST_HANA_RUNTIME_CHECK(hana::first(p) == MoveOnly{3});
- BOOST_HANA_RUNTIME_CHECK(hana::second(p) == 4);
- }
- {
- constexpr hana::pair<int, short> p = hana::make_pair(3, 4);
- static_assert(hana::first(p) == 3, "");
- static_assert(hana::second(p) == 4, "");
- }
- // equivalence with make<pair_tag>
- {
- constexpr hana::pair<int, short> p = hana::make<hana::pair_tag>(3, 4);
- static_assert(hana::first(p) == 3, "");
- static_assert(hana::second(p) == 4, "");
- }
- }
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