1 /*
2 * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_UTILITIES_TUPLE_HPP
26 #define SHARE_UTILITIES_TUPLE_HPP
27
28 #include "cppstdlib/type_traits.hpp"
29
30 template <class... Ts>
31 class Tuple;
32
33 template <>
34 class Tuple<> {};
35
36 template <class T, class... Ts>
37 class Tuple<T, Ts...> {
38 private:
39 T _first;
40 Tuple<Ts...> _remaining;
41
42 public:
43 constexpr Tuple(const T& first, const Ts&... remaining) noexcept
44 : _first(first), _remaining(remaining...) {}
45
46 template <std::size_t I, std::enable_if_t<(I > 0), int> = 0>
47 constexpr const auto& get() const noexcept {
48 return _remaining.template get<I - 1>();
49 };
50
51 template <std::size_t I, std::enable_if_t<I == 0, int> = 0>
52 constexpr const T& get() const noexcept {
53 return _first;
54 }
55 };
56
57 #endif // SHARE_UTILITIES_TUPLE_HPP
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1 /*
2 * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_UTILITIES_TUPLE_HPP
26 #define SHARE_UTILITIES_TUPLE_HPP
27
28 #include "cppstdlib/type_traits.hpp"
29
30 template <class... Ts>
31 class Tuple;
32
33 template <>
34 class Tuple<> {};
35
36 template <class T, class... Ts>
37 class Tuple<T, Ts...> {
38 private:
39 T _first;
40 Tuple<Ts...> _remaining;
41
42 public:
43 constexpr explicit Tuple() noexcept : _first(), _remaining() {}
44
45 constexpr Tuple(const T& first, const Ts&... remaining) noexcept
46 : _first(first), _remaining(remaining...) {}
47
48 template <std::size_t I, std::enable_if_t<(I > 0), int> = 0>
49 constexpr const auto& get() const noexcept {
50 return _remaining.template get<I - 1>();
51 };
52
53 template <std::size_t I, std::enable_if_t<I == 0, int> = 0>
54 constexpr const T& get() const noexcept {
55 return _first;
56 }
57 };
58
59 #endif // SHARE_UTILITIES_TUPLE_HPP
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