1/*
2 * Copyright (c) 2017, 2019, 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_METAPROGRAMMING_CONDITIONAL_HPP
26#define SHARE_METAPROGRAMMING_CONDITIONAL_HPP
27
28#include "memory/allocation.hpp"
29
30// This trait evaluates its typedef called "type" to TrueType iff the condition
31// is true. Otherwise it evaluates to FalseType.
32
33template <bool condition, typename TrueType, typename FalseType>
34struct Conditional: AllStatic {
35 typedef TrueType type;
36};
37
38template <typename TrueType, typename FalseType>
39struct Conditional<false, TrueType, FalseType>: AllStatic {
40 typedef FalseType type;
41};
42
43#endif // SHARE_METAPROGRAMMING_CONDITIONAL_HPP
44