58 lines
1.7 KiB
C++
58 lines
1.7 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/assert.hpp>
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#include <boost/hana/core/make.hpp>
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#include <boost/hana/first.hpp>
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#include <boost/hana/pair.hpp>
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#include <boost/hana/second.hpp>
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namespace hana = boost::hana;
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struct MoveOnly {
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int data_;
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MoveOnly(MoveOnly const&) = delete;
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MoveOnly& operator=(MoveOnly const&) = delete;
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MoveOnly(int data) : data_(data) { }
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MoveOnly(MoveOnly&& x) : data_(x.data_) { x.data_ = 0; }
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MoveOnly& operator=(MoveOnly&& x)
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{ data_ = x.data_; x.data_ = 0; return *this; }
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bool operator==(const MoveOnly& x) const { return data_ == x.data_; }
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};
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int main() {
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{
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hana::pair<int, short> p = hana::make_pair(3, 4);
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BOOST_HANA_RUNTIME_CHECK(hana::first(p) == 3);
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BOOST_HANA_RUNTIME_CHECK(hana::second(p) == 4);
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}
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{
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hana::pair<MoveOnly, short> p = hana::make_pair(MoveOnly{3}, 4);
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BOOST_HANA_RUNTIME_CHECK(hana::first(p) == MoveOnly{3});
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BOOST_HANA_RUNTIME_CHECK(hana::second(p) == 4);
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}
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{
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hana::pair<MoveOnly, short> p = hana::make_pair(3, 4);
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BOOST_HANA_RUNTIME_CHECK(hana::first(p) == MoveOnly{3});
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BOOST_HANA_RUNTIME_CHECK(hana::second(p) == 4);
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}
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{
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constexpr hana::pair<int, short> p = hana::make_pair(3, 4);
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static_assert(hana::first(p) == 3, "");
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static_assert(hana::second(p) == 4, "");
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}
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// equivalence with make<pair_tag>
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{
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constexpr hana::pair<int, short> p = hana::make<hana::pair_tag>(3, 4);
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static_assert(hana::first(p) == 3, "");
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static_assert(hana::second(p) == 4, "");
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}
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}
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