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a945c346 | 1 | // Copyright (C) 2016-2024 Free Software Foundation, Inc. |
9e023e33 JW |
2 | // |
3 | // This file is part of the GNU ISO C++ Library. This library is free | |
4 | // software; you can redistribute it and/or modify it under the | |
5 | // terms of the GNU General Public License as published by the | |
6 | // Free Software Foundation; either version 3, or (at your option) | |
7 | // any later version. | |
8 | ||
9 | // This library is distributed in the hope that it will be useful, | |
10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | // GNU General Public License for more details. | |
13 | ||
14 | // You should have received a copy of the GNU General Public License along | |
15 | // with this library; see the file COPYING3. If not see | |
16 | // <http://www.gnu.org/licenses/>. | |
17 | ||
7b936140 | 18 | // { dg-do compile { target c++17 } } |
f4ab6846 | 19 | // { dg-add-options no_pch } |
9e023e33 JW |
20 | |
21 | #include <utility> | |
22 | ||
23 | // LWG 2296 std::addressof should be constexpr | |
24 | ||
25 | #ifndef __cpp_lib_addressof_constexpr | |
26 | # error "Feature-test macro for constexpr addressof missing" | |
27 | #elif __cpp_lib_addressof_constexpr != 201603 | |
28 | # error "Feature-test macro for constexpr addressof has wrong value" | |
29 | #endif | |
30 | ||
31 | int i; | |
32 | constexpr int* pi = std::addressof(i); | |
33 | static_assert( pi == &i, "&i" ); | |
34 | ||
35 | struct X { | |
36 | void operator&(); | |
37 | constexpr X* addr() { return this; } | |
38 | constexpr const X* addr() const { return this; } | |
39 | }; | |
40 | X x; | |
41 | constexpr X* px = std::addressof(x); | |
42 | static_assert( px == x.addr(), "x.addr()" ); | |
43 | const X cx; | |
44 | constexpr const X* pcx = std::addressof(cx); | |
45 | static_assert( pcx == cx.addr(), "cx.addr()" ); | |
46 | ||
47 | void | |
48 | test01() | |
49 | { | |
50 | static int i2; | |
51 | static_assert( std::addressof(i2) == &i2, "&i2" ); | |
52 | ||
53 | static X x2; | |
54 | static_assert( std::addressof(x2) == x2.addr(), "x2.addr()" ); | |
55 | } |