ceph/src/boost/libs/hana/test/optional/copy.trap_construct.cpp

   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
  14 int 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 }