mirror of https://gitee.com/bigwinds/arangodb
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
// Copyright Louis Dionne 2013-2016
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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/basic_tuple.hpp>
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#include <laws/base.hpp>
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#include <string>
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namespace hana = boost::hana;
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struct Empty { };
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int main() {
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{
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using T = hana::basic_tuple<>;
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T t0;
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T t_implicit = t0;
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T t_explicit(t0);
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(void)t_explicit;
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(void)t_implicit;
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}
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{
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using T = hana::basic_tuple<int>;
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T t0(2);
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T t = t0;
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BOOST_HANA_RUNTIME_CHECK(hana::get_impl<0>(t) == 2);
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}
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{
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using T = hana::basic_tuple<int, char>;
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T t0(2, 'a');
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T t = t0;
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BOOST_HANA_RUNTIME_CHECK(hana::get_impl<0>(t) == 2);
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BOOST_HANA_RUNTIME_CHECK(hana::get_impl<1>(t) == 'a');
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}
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{
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using T = hana::basic_tuple<int, char, std::string>;
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const T t0(2, 'a', "some text");
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T t = t0;
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BOOST_HANA_RUNTIME_CHECK(hana::get_impl<0>(t) == 2);
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BOOST_HANA_RUNTIME_CHECK(hana::get_impl<1>(t) == 'a');
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BOOST_HANA_RUNTIME_CHECK(hana::get_impl<2>(t) == "some text");
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}
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{
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using T = hana::basic_tuple<int>;
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constexpr T t0(2);
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constexpr T t = t0;
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static_assert(hana::get_impl<0>(t) == 2, "");
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}
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{
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using T = hana::basic_tuple<Empty>;
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constexpr T t0{};
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constexpr T t = t0;
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constexpr Empty e = hana::get_impl<0>(t); (void)e;
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}
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{
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struct T { };
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struct U { };
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constexpr hana::basic_tuple<T, U> binary{};
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constexpr hana::basic_tuple<T, U> copy_implicit = binary;
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constexpr hana::basic_tuple<T, U> copy_explicit(binary);
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(void)copy_implicit;
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(void)copy_explicit;
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}
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// This used to fail
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{
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hana::basic_tuple<
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hana::test::ct_eq<0>,
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hana::test::ct_eq<2>,
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hana::test::ct_eq<4>
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> tuple{};
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hana::basic_tuple<
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hana::test::ct_eq<0>,
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hana::test::ct_eq<2>,
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hana::test::ct_eq<4>
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> copy(tuple);
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}
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}
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