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99dee823 | 1 | // Copyright (C) 2015-2021 Free Software Foundation, Inc. |
793cac74 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 | ||
52066eae | 18 | // { dg-do run { target c++11 } } |
793cac74 JW |
19 | |
20 | #include <vector> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
23 | template<typename T> | |
24 | void check(const T& t) | |
25 | { | |
26 | for (auto& e : t) | |
27 | VERIFY( !e.moved_from); | |
28 | } | |
29 | ||
30 | // This type is CopyInsertable into std::vector<Bomb> so push_back should | |
31 | // have the strong exception-safety guarantee. | |
32 | struct Bomb | |
33 | { | |
34 | Bomb() = default; | |
35 | ||
36 | Bomb(const Bomb& b) | |
37 | : armed(b.armed) | |
38 | { | |
39 | tick(); | |
40 | } | |
41 | ||
42 | Bomb(Bomb&& b) noexcept(false) | |
43 | : armed(b.armed) | |
44 | { | |
45 | tick(); | |
46 | b.moved_from = true; | |
47 | } | |
48 | ||
49 | // std::vector in GCC 4.x tries to use this constructor | |
50 | template<typename T> Bomb(T&) = delete; | |
51 | ||
52 | bool moved_from = false; | |
53 | bool armed = true; | |
54 | ||
55 | private: | |
56 | void tick() | |
57 | { | |
58 | if (armed && ticks++) | |
59 | throw 1; | |
60 | } | |
61 | ||
62 | static int ticks; | |
63 | }; | |
64 | ||
65 | int Bomb::ticks = 0; | |
66 | ||
67 | void test01() | |
68 | { | |
69 | std::vector<Bomb> v(2); // fill with armed bombs | |
70 | v.resize(v.capacity()); // ensure no unused capacity | |
71 | check(v); // sanity check | |
72 | ||
73 | try { | |
74 | Bomb defused; | |
75 | // don't want any copies/moves of this object to throw | |
76 | defused.armed = false; | |
77 | // insert new element, existing elements will be relocated and explode | |
78 | v.push_back(defused); | |
79 | VERIFY(false); // should be unreachable | |
80 | } catch (int) { | |
81 | check(v); // make sure no elements have been moved from | |
82 | } | |
83 | } | |
84 | ||
85 | int main() | |
86 | { | |
87 | test01(); | |
88 | } |