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7adcbafe | 1 | // Copyright (C) 2020-2022 Free Software Foundation, Inc. |
e1008cd1 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 | ||
18 | // { dg-do run { target c++11 } } | |
19 | ||
20 | #include <algorithm> | |
21 | #include <testsuite_iterators.h> | |
22 | ||
23 | void | |
24 | test01() | |
25 | { | |
26 | // Negative sizes should be a no-op | |
27 | ||
28 | const int from[2] = { 1, 2 }; | |
29 | __gnu_test::input_container<const int> f(from); | |
30 | int* to = nullptr; | |
31 | std::copy_n(f.begin(), -1, to); | |
32 | ||
33 | std::copy_n(from, -20000, to); // random access | |
34 | ||
35 | __gnu_test::random_access_container<const int> f2(from); | |
36 | std::copy_n(f2.end(), -1, to); | |
37 | std::copy_n(f2.begin(), -1, to); | |
38 | } | |
39 | ||
40 | struct Size | |
41 | { | |
42 | operator long() const { return 2L; } | |
43 | ||
44 | void operator++() = delete; | |
45 | void operator--() = delete; | |
46 | void operator++(int) = delete; | |
47 | void operator--(int) = delete; | |
48 | ||
49 | template<typename T> friend void operator+(Size, T) = delete; | |
50 | template<typename T> friend void operator+(T, Size) = delete; | |
51 | template<typename T> friend void operator-(Size, T) = delete; | |
52 | template<typename T> friend void operator-(T, Size) = delete; | |
53 | template<typename T> friend void operator==(Size, T) = delete; | |
54 | template<typename T> friend void operator==(T, Size) = delete; | |
55 | template<typename T> friend void operator!=(Size, T) = delete; | |
56 | template<typename T> friend void operator!=(T, Size) = delete; | |
57 | template<typename T> friend void operator<(Size, T) = delete; | |
58 | template<typename T> friend void operator<(T, Size) = delete; | |
59 | template<typename T> friend void operator<=(Size, T) = delete; | |
60 | template<typename T> friend void operator<=(T, Size) = delete; | |
61 | template<typename T> friend void operator>(Size, T) = delete; | |
62 | template<typename T> friend void operator>(T, Size) = delete; | |
63 | template<typename T> friend void operator>=(Size, T) = delete; | |
64 | template<typename T> friend void operator>=(T, Size) = delete; | |
65 | }; | |
66 | ||
67 | void | |
68 | test02() | |
69 | { | |
70 | // C++20 only requires that Size is convertible to an integral type, | |
71 | // it doesn't need to support any arithmetic or relational expressions. | |
72 | ||
73 | const int from[3] = { 1, 2, 3 }; | |
74 | __gnu_test::input_container<const int> f(from); | |
75 | int to[3] = { }; | |
76 | __gnu_test::output_container<int> t(to); | |
77 | Size s; | |
78 | std::copy_n(f.begin(), s, t.begin()); | |
79 | VERIFY( to[0] == 1 ); | |
80 | VERIFY( to[1] == 2 ); | |
81 | VERIFY( to[2] == 0 ); | |
82 | ||
83 | const int from2[3] = { 11, 22, 33 }; | |
84 | __gnu_test::random_access_container<const int> f2(from2); | |
85 | __gnu_test::output_container<int> t2(to); | |
86 | std::copy_n(f2.begin(), s, t2.begin()); | |
87 | VERIFY( to[0] == 11 ); | |
88 | VERIFY( to[1] == 22 ); | |
89 | VERIFY( to[2] == 0 ); | |
90 | } | |
91 | ||
92 | int | |
93 | main() | |
94 | { | |
95 | test01(); | |
96 | test02(); | |
97 | } |