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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/test/pair/assign.move.cpp | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/pair/assign.move.cpp b/src/boost/libs/hana/test/pair/assign.move.cpp new file mode 100644 index 000000000..5d3fd18df --- /dev/null +++ b/src/boost/libs/hana/test/pair/assign.move.cpp @@ -0,0 +1,70 @@ +// 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/assert.hpp> +#include <boost/hana/config.hpp> +#include <boost/hana/first.hpp> +#include <boost/hana/pair.hpp> +#include <boost/hana/second.hpp> + +#include <utility> +namespace hana = boost::hana; + + +struct MoveOnly { + int data_; + MoveOnly(MoveOnly const&) = delete; + MoveOnly& operator=(MoveOnly const&) = delete; + MoveOnly(int data = 1) : data_(data) { } + MoveOnly(MoveOnly&& x) : data_(x.data_) { x.data_ = 0; } + + MoveOnly& operator=(MoveOnly&& x) + { data_ = x.data_; x.data_ = 0; return *this; } + + bool operator==(const MoveOnly& x) const { return data_ == x.data_; } +}; + +struct MoveOnlyDerived : MoveOnly { + MoveOnlyDerived(MoveOnlyDerived&&) = default; + MoveOnlyDerived(int data = 1) : MoveOnly(data) { } +}; + +constexpr auto in_constexpr_context(int a, short b) { + hana::pair<int, short> p1(a, b); + hana::pair<int, short> p2; + hana::pair<double, long> p3; + p2 = std::move(p1); + p3 = std::move(p2); + return p3; +} + +int main() { + // from pair<T, U> to pair<T, U> + { + hana::pair<MoveOnly, short> p1(MoveOnly{3}, 4); + hana::pair<MoveOnly, short> p2; + p2 = std::move(p1); + BOOST_HANA_RUNTIME_CHECK(hana::first(p2) == MoveOnly{3}); + BOOST_HANA_RUNTIME_CHECK(hana::second(p2) == 4); + } + + // from pair<T, U> to pair<V, W> + { + hana::pair<MoveOnlyDerived, short> p1(MoveOnlyDerived{3}, 4); + hana::pair<MoveOnly, long> p2; + p2 = std::move(p1); + BOOST_HANA_RUNTIME_CHECK(hana::first(p2) == MoveOnly{3}); + BOOST_HANA_RUNTIME_CHECK(hana::second(p2) == 4); + } + + // make sure that also works in a constexpr context + // (test fails under GCC <= 6 due to buggy constexpr) +#if BOOST_HANA_CONFIG_GCC >= BOOST_HANA_CONFIG_VERSION(7, 0, 0) + { + constexpr auto p = in_constexpr_context(3, 4); + static_assert(hana::first(p) == 3, ""); + static_assert(hana::second(p) == 4, ""); + } +#endif +} |