1 // Copyright Louis Dionne 2013-2017 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) 4 5 #include <boost/hana/optional.hpp> 6 7 #include <laws/base.hpp> 8 namespace hana = boost::hana; 9 10 11 // This test makes sure that we do not instantiate rogue contructors when 12 // trying to copy a hana::just. 13 main()14int main() { 15 auto just = hana::just(hana::test::trap_construct{}); 16 auto implicit_copy = just; 17 decltype(just) explicit_copy(just); 18 19 (void)implicit_copy; 20 (void)explicit_copy; 21 } 22