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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/tuple.hpp>
#include <utility>
namespace hana = boost::hana;
// a non-movable, non-copyable type
struct RefOnly {
RefOnly() = default;
RefOnly(RefOnly const&) = delete;
RefOnly(RefOnly&&) = delete;
};
struct Empty { };
int main() {
// Make sure we can create a tuple of rvalue references
{
RefOnly e{};
hana::tuple<RefOnly&&> xs{std::move(e)};
hana::tuple<RefOnly&&, RefOnly&&> ys{std::move(e), std::move(e)};
(void)xs; (void)ys;
hana::tuple<RefOnly&&> xs2 = {std::move(e)};
hana::tuple<RefOnly&&, RefOnly&&> ys2 = {std::move(e), std::move(e)};
(void)xs2; (void)ys2;
}
// Make sure we can create a tuple of non-const lvalue references
{
RefOnly e{};
hana::tuple<RefOnly&> xs{e};
hana::tuple<RefOnly&, RefOnly&> ys{e, e};
(void)xs; (void)ys;
hana::tuple<RefOnly&> xs2 = {e};
hana::tuple<RefOnly&, RefOnly&> ys2 = {e, e};
(void)xs2; (void)ys2;
}
// Make sure we can create a tuple of const lvalue references
{
RefOnly const e{};
hana::tuple<RefOnly const&> xs{e};
hana::tuple<RefOnly const&, RefOnly const&> ys{e, e};
(void)xs; (void)ys;
hana::tuple<RefOnly const&> xs2 = {e};
hana::tuple<RefOnly const&, RefOnly const&> ys2 = {e, e};
(void)xs2; (void)ys2;
}
// Try to construct tuples with mixed references and non-reference members.
{
RefOnly r{};
Empty e{};
{
hana::tuple<RefOnly const&, Empty> xs{r, e};
hana::tuple<RefOnly const&, Empty> ys = {r, e};
(void)xs; (void)ys;
}
{
hana::tuple<RefOnly&, Empty> xs{r, e};
hana::tuple<RefOnly&, Empty> ys = {r, e};
(void)xs; (void)ys;
}
{
hana::tuple<RefOnly&&, Empty> xs{std::move(r), e};
hana::tuple<RefOnly&&, Empty> ys = {std::move(r), e};
(void)xs; (void)ys;
}
}
}
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