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tuple (get): Implement N3670.
[thirdparty/gcc.git] / libstdc++-v3 / testsuite / 20_util / pair / astuple / constexpr_get_by_type.cc
1 // { dg-options "-std=gnu++1y" }
2 // { dg-do compile }
3
4 // Copyright (C) 2013 Free Software Foundation, Inc.
5 //
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 3, or (at your option)
10 // any later version.
11
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
16
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING3. If not see
19 // <http://www.gnu.org/licenses/>.
20
21 // Tuple-like access to pair
22
23 #include <utility>
24
25 std::pair<int, char> p;
26 const std::pair<int, char> cp;
27
28 constexpr const int& cri = std::get<int>(cp);
29 constexpr int& ri = std::get<int>(p);
30 constexpr int&& rri = std::get<int>(std::move(p));
31
32 constexpr const char& crc = std::get<char>(cp);
33 constexpr char& rc = std::get<char>(p);
34 constexpr char&& rrc = std::get<char>(std::move(p));