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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>
- namespace hana = boost::hana;
- struct B {
- int id_;
- explicit B(int i = 0) : id_(i) { }
- };
- struct D : B {
- explicit D(int i = 0) : B(i) { }
- };
- int main() {
- {
- using T0 = hana::tuple<double>;
- using T1 = hana::tuple<int>;
- T0 t0(2.5);
- T1 t1;
- t1 = t0;
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t1) == 2);
- }
- {
- using T0 = hana::tuple<double, char>;
- using T1 = hana::tuple<int, int>;
- T0 t0(2.5, 'a');
- T1 t1;
- t1 = t0;
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t1) == 2);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t1) == int('a'));
- }
- {
- using T0 = hana::tuple<double, char, D>;
- using T1 = hana::tuple<int, int, B>;
- T0 t0(2.5, 'a', D(3));
- T1 t1;
- t1 = t0;
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t1) == 2);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t1) == int('a'));
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t1).id_ == 3);
- }
- {
- D d(3);
- D d2(2);
- using T0 = hana::tuple<double, char, D&>;
- using T1 = hana::tuple<int, int, B&>;
- T0 t0(2.5, 'a', d2);
- T1 t1(1.5, 'b', d);
- t1 = t0;
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t1) == 2);
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t1) == int('a'));
- BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t1).id_ == 2);
- }
- }
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