79 lines
2.2 KiB
C++
79 lines
2.2 KiB
C++
// Copyright Louis Dionne 2013-2017
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/tuple.hpp>
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#include <utility>
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namespace hana = boost::hana;
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// a non-movable, non-copyable type
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struct RefOnly {
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RefOnly() = default;
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RefOnly(RefOnly const&) = delete;
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RefOnly(RefOnly&&) = delete;
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};
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struct Empty { };
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int main() {
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// Make sure we can create a tuple of rvalue references
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{
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RefOnly e{};
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hana::tuple<RefOnly&&> xs{std::move(e)};
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hana::tuple<RefOnly&&, RefOnly&&> ys{std::move(e), std::move(e)};
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(void)xs; (void)ys;
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hana::tuple<RefOnly&&> xs2 = {std::move(e)};
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hana::tuple<RefOnly&&, RefOnly&&> ys2 = {std::move(e), std::move(e)};
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(void)xs2; (void)ys2;
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}
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// Make sure we can create a tuple of non-const lvalue references
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{
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RefOnly e{};
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hana::tuple<RefOnly&> xs{e};
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hana::tuple<RefOnly&, RefOnly&> ys{e, e};
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(void)xs; (void)ys;
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hana::tuple<RefOnly&> xs2 = {e};
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hana::tuple<RefOnly&, RefOnly&> ys2 = {e, e};
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(void)xs2; (void)ys2;
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}
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// Make sure we can create a tuple of const lvalue references
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{
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RefOnly const e{};
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hana::tuple<RefOnly const&> xs{e};
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hana::tuple<RefOnly const&, RefOnly const&> ys{e, e};
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(void)xs; (void)ys;
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hana::tuple<RefOnly const&> xs2 = {e};
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hana::tuple<RefOnly const&, RefOnly const&> ys2 = {e, e};
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(void)xs2; (void)ys2;
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}
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// Try to construct tuples with mixed references and non-reference members.
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{
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RefOnly r{};
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Empty e{};
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{
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hana::tuple<RefOnly const&, Empty> xs{r, e};
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hana::tuple<RefOnly const&, Empty> ys = {r, e};
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(void)xs; (void)ys;
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}
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{
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hana::tuple<RefOnly&, Empty> xs{r, e};
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hana::tuple<RefOnly&, Empty> ys = {r, e};
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(void)xs; (void)ys;
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}
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{
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hana::tuple<RefOnly&&, Empty> xs{std::move(r), e};
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hana::tuple<RefOnly&&, Empty> ys = {std::move(r), e};
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(void)xs; (void)ys;
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}
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}
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}
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