1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <string>
10
11 // size_type copy(charT* s, size_type n, size_type pos = 0) const; // constexpr since C++20
12
13 #include <string>
14 #include <stdexcept>
15 #include <algorithm>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "min_allocator.h"
20 #include "asan_testing.h"
21
22 template <class S>
test(S str,typename S::value_type * s,typename S::size_type n,typename S::size_type pos)23 TEST_CONSTEXPR_CXX20 void test(S str, typename S::value_type* s, typename S::size_type n, typename S::size_type pos) {
24 const S& cs = str;
25 if (pos <= cs.size()) {
26 typename S::size_type r = cs.copy(s, n, pos);
27 typename S::size_type rlen = std::min(n, cs.size() - pos);
28 assert(r == rlen);
29 LIBCPP_ASSERT(is_string_asan_correct(str));
30 LIBCPP_ASSERT(is_string_asan_correct(cs));
31
32 for (r = 0; r < rlen; ++r)
33 assert(S::traits_type::eq(cs[pos + r], s[r]));
34 }
35 #ifndef TEST_HAS_NO_EXCEPTIONS
36 else if (!TEST_IS_CONSTANT_EVALUATED) {
37 try {
38 typename S::size_type r = cs.copy(s, n, pos);
39 ((void)r); // Prevent unused warning
40 assert(false);
41 } catch (std::out_of_range&) {
42 assert(pos > str.size());
43 }
44 }
45 #endif
46 }
47
48 template <class S>
test_string()49 TEST_CONSTEXPR_CXX20 void test_string() {
50 char s[50];
51 test(S(""), s, 0, 0);
52 test(S(""), s, 0, 1);
53 test(S(""), s, 1, 0);
54 test(S("abcde"), s, 0, 0);
55 test(S("abcde"), s, 0, 1);
56 test(S("abcde"), s, 0, 2);
57 test(S("abcde"), s, 0, 4);
58 test(S("abcde"), s, 0, 5);
59 test(S("abcde"), s, 0, 6);
60 test(S("abcde"), s, 1, 0);
61 test(S("abcde"), s, 1, 1);
62 test(S("abcde"), s, 1, 2);
63 test(S("abcde"), s, 1, 4);
64 test(S("abcde"), s, 1, 5);
65 test(S("abcde"), s, 2, 0);
66 test(S("abcde"), s, 2, 1);
67 test(S("abcde"), s, 2, 2);
68 test(S("abcde"), s, 2, 4);
69 test(S("abcde"), s, 4, 0);
70 test(S("abcde"), s, 4, 1);
71 test(S("abcde"), s, 4, 2);
72 test(S("abcde"), s, 5, 0);
73 test(S("abcde"), s, 5, 1);
74 test(S("abcde"), s, 6, 0);
75 test(S("abcdefghijklmnopqrst"), s, 0, 0);
76 test(S("abcdefghijklmnopqrst"), s, 0, 1);
77 test(S("abcdefghijklmnopqrst"), s, 0, 2);
78 test(S("abcdefghijklmnopqrst"), s, 0, 10);
79 test(S("abcdefghijklmnopqrst"), s, 0, 19);
80 test(S("abcdefghijklmnopqrst"), s, 0, 20);
81 test(S("abcdefghijklmnopqrst"), s, 0, 21);
82 test(S("abcdefghijklmnopqrst"), s, 1, 0);
83 test(S("abcdefghijklmnopqrst"), s, 1, 1);
84 test(S("abcdefghijklmnopqrst"), s, 1, 2);
85 test(S("abcdefghijklmnopqrst"), s, 1, 9);
86 test(S("abcdefghijklmnopqrst"), s, 1, 18);
87 test(S("abcdefghijklmnopqrst"), s, 1, 19);
88 test(S("abcdefghijklmnopqrst"), s, 1, 20);
89 test(S("abcdefghijklmnopqrst"), s, 2, 0);
90 test(S("abcdefghijklmnopqrst"), s, 2, 1);
91 test(S("abcdefghijklmnopqrst"), s, 2, 2);
92 test(S("abcdefghijklmnopqrst"), s, 2, 9);
93 test(S("abcdefghijklmnopqrst"), s, 2, 17);
94 test(S("abcdefghijklmnopqrst"), s, 2, 18);
95 test(S("abcdefghijklmnopqrst"), s, 2, 19);
96 test(S("abcdefghijklmnopqrst"), s, 10, 0);
97 test(S("abcdefghijklmnopqrst"), s, 10, 1);
98 test(S("abcdefghijklmnopqrst"), s, 10, 2);
99 test(S("abcdefghijklmnopqrst"), s, 10, 5);
100 test(S("abcdefghijklmnopqrst"), s, 10, 9);
101 test(S("abcdefghijklmnopqrst"), s, 10, 10);
102 test(S("abcdefghijklmnopqrst"), s, 10, 11);
103 test(S("abcdefghijklmnopqrst"), s, 19, 0);
104 test(S("abcdefghijklmnopqrst"), s, 19, 1);
105 test(S("abcdefghijklmnopqrst"), s, 19, 2);
106 test(S("abcdefghijklmnopqrst"), s, 20, 0);
107 test(S("abcdefghijklmnopqrst"), s, 20, 1);
108 test(S("abcdefghijklmnopqrst"), s, 21, 0);
109 test(S("abcdefghijklmnopqrstabcdefghijklmnopqrst"), s, 40, 1);
110 test(S("abcdefghijklmnopqrstabcdefghijklmnopqrst"), s, 40, 0);
111 }
112
test()113 TEST_CONSTEXPR_CXX20 bool test() {
114 test_string<std::string>();
115 #if TEST_STD_VER >= 11
116 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
117 test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
118 #endif
119
120 return true;
121 }
122
main(int,char **)123 int main(int, char**) {
124 test();
125 #if TEST_STD_VER > 17
126 static_assert(test());
127 #endif
128
129 return 0;
130 }
131