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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/tuple.hpp>
- #include <utility>
- namespace hana = boost::hana;
- struct MoveOnly {
- int data_;
- MoveOnly(MoveOnly const&) = delete;
- MoveOnly& operator=(MoveOnly const&) = delete;
- MoveOnly(int data = 1) : data_(data) { }
- MoveOnly(MoveOnly&& x) : data_(x.data_) { x.data_ = 0; }
- MoveOnly& operator=(MoveOnly&& x)
- { data_ = x.data_; x.data_ = 0; return *this; }
- int get() const {return data_;}
- bool operator==(const MoveOnly& x) const { return data_ == x.data_; }
- bool operator< (const MoveOnly& x) const { return data_ < x.data_; }
- };
- int main() {
- {
- using T = hana::tuple<>;
- T t0;
- T t;
- t = std::move(t0);
- }
- {
- using T = hana::tuple<MoveOnly>;
- T t0(MoveOnly(0));
- T t;
- t = std::move(t0);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 0);
- }
- {
- using T = hana::tuple<MoveOnly, MoveOnly>;
- T t0(MoveOnly(0), MoveOnly(1));
- T t;
- t = std::move(t0);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 0);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 1);
- }
- {
- using T = hana::tuple<MoveOnly, MoveOnly, MoveOnly>;
- T t0(MoveOnly(0), MoveOnly(1), MoveOnly(2));
- T t;
- t = std::move(t0);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 0);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 1);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == 2);
- }
- }
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