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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/bool.hpp>
#include <boost/hana/detail/wrong.hpp>
#include <boost/hana/fwd/hash.hpp>
#include <boost/hana/set.hpp>
#include <boost/hana/type.hpp>
#include <utility>
namespace hana = boost::hana;
// This test makes sure that we do not instantiate rogue constructors when
// doing copies and moves
template <int i>
struct Trap {
Trap() = default;
Trap(Trap const&) = default;
#ifndef BOOST_HANA_WORKAROUND_MSVC_MULTIPLECTOR_106654
Trap(Trap&) = default;
#endif
Trap(Trap&&) = default;
template <typename X>
Trap(X&&) {
static_assert(hana::detail::wrong<X>{},
"this constructor must not be instantiated");
}
};
template <int i, int j>
constexpr auto operator==(Trap<i> const&, Trap<j> const&)
{ return hana::bool_c<i == j>; }
template <int i, int j>
constexpr auto operator!=(Trap<i> const&, Trap<j> const&)
{ return hana::bool_c<i != j>; }
namespace boost { namespace hana {
template <int i>
struct hash_impl<Trap<i>> {
static constexpr auto apply(Trap<i> const&)
{ return hana::type_c<Trap<i>>; };
};
}}
int main() {
{
auto expr = hana::make_set(Trap<0>{});
auto implicit_copy = expr;
decltype(expr) explicit_copy(expr);
(void)implicit_copy;
(void)explicit_copy;
}
{
auto expr = hana::make_set(Trap<0>{});
auto implicit_move = std::move(expr);
decltype(expr) explicit_move(std::move(implicit_move));
(void)implicit_move;
(void)explicit_move;
}
}
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