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// int compare(size_type pos, size_type n1, const charT *s) const; // constexpr since C++20
12
13#include <string>
14#include <stdexcept>
15#include <cassert>
16
17#include "min_allocator.h"
18
19#include "test_macros.h"
20
21TEST_CONSTEXPR_CXX20 int sign(int x) {
22 if (x == 0)
23 return 0;
24 if (x < 0)
25 return -1;
26 return 1;
27}
28
29template <class S>
30TEST_CONSTEXPR_CXX20 void
31test(const S& s, typename S::size_type pos1, typename S::size_type n1, const typename S::value_type* str, int x) {
32 if (pos1 <= s.size())
33 assert(sign(s.compare(pos1, n1, str)) == sign(x));
34#ifndef TEST_HAS_NO_EXCEPTIONS
35 else if (!TEST_IS_CONSTANT_EVALUATED) {
36 try {
37 TEST_IGNORE_NODISCARD s.compare(pos1, n1, str);
38 assert(false);
39 } catch (std::out_of_range&) {
40 assert(pos1 > s.size());
41 }
42 }
43#endif
44}
45
46template <class S>
47TEST_CONSTEXPR_CXX20 void test0() {
48 test(S(""), 0, 0, "", 0);
49 test(S(""), 0, 0, "abcde", -5);
50 test(S(""), 0, 0, "abcdefghij", -10);
51 test(S(""), 0, 0, "abcdefghijklmnopqrst", -20);
52 test(S(""), 0, 1, "", 0);
53 test(S(""), 0, 1, "abcde", -5);
54 test(S(""), 0, 1, "abcdefghij", -10);
55 test(S(""), 0, 1, "abcdefghijklmnopqrst", -20);
56 test(S(""), 1, 0, "", 0);
57 test(S(""), 1, 0, "abcde", 0);
58 test(S(""), 1, 0, "abcdefghij", 0);
59 test(S(""), 1, 0, "abcdefghijklmnopqrst", 0);
60 test(S("abcde"), 0, 0, "", 0);
61 test(S("abcde"), 0, 0, "abcde", -5);
62 test(S("abcde"), 0, 0, "abcdefghij", -10);
63 test(S("abcde"), 0, 0, "abcdefghijklmnopqrst", -20);
64 test(S("abcde"), 0, 1, "", 1);
65 test(S("abcde"), 0, 1, "abcde", -4);
66 test(S("abcde"), 0, 1, "abcdefghij", -9);
67 test(S("abcde"), 0, 1, "abcdefghijklmnopqrst", -19);
68 test(S("abcde"), 0, 2, "", 2);
69 test(S("abcde"), 0, 2, "abcde", -3);
70 test(S("abcde"), 0, 2, "abcdefghij", -8);
71 test(S("abcde"), 0, 2, "abcdefghijklmnopqrst", -18);
72 test(S("abcde"), 0, 4, "", 4);
73 test(S("abcde"), 0, 4, "abcde", -1);
74 test(S("abcde"), 0, 4, "abcdefghij", -6);
75 test(S("abcde"), 0, 4, "abcdefghijklmnopqrst", -16);
76 test(S("abcde"), 0, 5, "", 5);
77 test(S("abcde"), 0, 5, "abcde", 0);
78 test(S("abcde"), 0, 5, "abcdefghij", -5);
79 test(S("abcde"), 0, 5, "abcdefghijklmnopqrst", -15);
80 test(S("abcde"), 0, 6, "", 5);
81 test(S("abcde"), 0, 6, "abcde", 0);
82 test(S("abcde"), 0, 6, "abcdefghij", -5);
83 test(S("abcde"), 0, 6, "abcdefghijklmnopqrst", -15);
84 test(S("abcde"), 1, 0, "", 0);
85 test(S("abcde"), 1, 0, "abcde", -5);
86 test(S("abcde"), 1, 0, "abcdefghij", -10);
87 test(S("abcde"), 1, 0, "abcdefghijklmnopqrst", -20);
88 test(S("abcde"), 1, 1, "", 1);
89 test(S("abcde"), 1, 1, "abcde", 1);
90 test(S("abcde"), 1, 1, "abcdefghij", 1);
91 test(S("abcde"), 1, 1, "abcdefghijklmnopqrst", 1);
92 test(S("abcde"), 1, 2, "", 2);
93 test(S("abcde"), 1, 2, "abcde", 1);
94 test(S("abcde"), 1, 2, "abcdefghij", 1);
95 test(S("abcde"), 1, 2, "abcdefghijklmnopqrst", 1);
96 test(S("abcde"), 1, 3, "", 3);
97 test(S("abcde"), 1, 3, "abcde", 1);
98 test(S("abcde"), 1, 3, "abcdefghij", 1);
99 test(S("abcde"), 1, 3, "abcdefghijklmnopqrst", 1);
100 test(S("abcde"), 1, 4, "", 4);
101 test(S("abcde"), 1, 4, "abcde", 1);
102 test(S("abcde"), 1, 4, "abcdefghij", 1);
103 test(S("abcde"), 1, 4, "abcdefghijklmnopqrst", 1);
104 test(S("abcde"), 1, 5, "", 4);
105 test(S("abcde"), 1, 5, "abcde", 1);
106 test(S("abcde"), 1, 5, "abcdefghij", 1);
107 test(S("abcde"), 1, 5, "abcdefghijklmnopqrst", 1);
108 test(S("abcde"), 2, 0, "", 0);
109 test(S("abcde"), 2, 0, "abcde", -5);
110 test(S("abcde"), 2, 0, "abcdefghij", -10);
111 test(S("abcde"), 2, 0, "abcdefghijklmnopqrst", -20);
112 test(S("abcde"), 2, 1, "", 1);
113 test(S("abcde"), 2, 1, "abcde", 2);
114 test(S("abcde"), 2, 1, "abcdefghij", 2);
115 test(S("abcde"), 2, 1, "abcdefghijklmnopqrst", 2);
116 test(S("abcde"), 2, 2, "", 2);
117 test(S("abcde"), 2, 2, "abcde", 2);
118 test(S("abcde"), 2, 2, "abcdefghij", 2);
119 test(S("abcde"), 2, 2, "abcdefghijklmnopqrst", 2);
120 test(S("abcde"), 2, 3, "", 3);
121 test(S("abcde"), 2, 3, "abcde", 2);
122 test(S("abcde"), 2, 3, "abcdefghij", 2);
123 test(S("abcde"), 2, 3, "abcdefghijklmnopqrst", 2);
124 test(S("abcde"), 2, 4, "", 3);
125 test(S("abcde"), 2, 4, "abcde", 2);
126 test(S("abcde"), 2, 4, "abcdefghij", 2);
127 test(S("abcde"), 2, 4, "abcdefghijklmnopqrst", 2);
128 test(S("abcde"), 4, 0, "", 0);
129 test(S("abcde"), 4, 0, "abcde", -5);
130 test(S("abcde"), 4, 0, "abcdefghij", -10);
131 test(S("abcde"), 4, 0, "abcdefghijklmnopqrst", -20);
132 test(S("abcde"), 4, 1, "", 1);
133 test(S("abcde"), 4, 1, "abcde", 4);
134 test(S("abcde"), 4, 1, "abcdefghij", 4);
135 test(S("abcde"), 4, 1, "abcdefghijklmnopqrst", 4);
136 test(S("abcde"), 4, 2, "", 1);
137 test(S("abcde"), 4, 2, "abcde", 4);
138 test(S("abcde"), 4, 2, "abcdefghij", 4);
139 test(S("abcde"), 4, 2, "abcdefghijklmnopqrst", 4);
140 test(S("abcde"), 5, 0, "", 0);
141 test(S("abcde"), 5, 0, "abcde", -5);
142 test(S("abcde"), 5, 0, "abcdefghij", -10);
143 test(S("abcde"), 5, 0, "abcdefghijklmnopqrst", -20);
144 test(S("abcde"), 5, 1, "", 0);
145 test(S("abcde"), 5, 1, "abcde", -5);
146 test(S("abcde"), 5, 1, "abcdefghij", -10);
147 test(S("abcde"), 5, 1, "abcdefghijklmnopqrst", -20);
148}
149
150template <class S>
151TEST_CONSTEXPR_CXX20 void test1() {
152 test(S("abcde"), 6, 0, "", 0);
153 test(S("abcde"), 6, 0, "abcde", 0);
154 test(S("abcde"), 6, 0, "abcdefghij", 0);
155 test(S("abcde"), 6, 0, "abcdefghijklmnopqrst", 0);
156 test(S("abcdefghij"), 0, 0, "", 0);
157 test(S("abcdefghij"), 0, 0, "abcde", -5);
158 test(S("abcdefghij"), 0, 0, "abcdefghij", -10);
159 test(S("abcdefghij"), 0, 0, "abcdefghijklmnopqrst", -20);
160 test(S("abcdefghij"), 0, 1, "", 1);
161 test(S("abcdefghij"), 0, 1, "abcde", -4);
162 test(S("abcdefghij"), 0, 1, "abcdefghij", -9);
163 test(S("abcdefghij"), 0, 1, "abcdefghijklmnopqrst", -19);
164 test(S("abcdefghij"), 0, 5, "", 5);
165 test(S("abcdefghij"), 0, 5, "abcde", 0);
166 test(S("abcdefghij"), 0, 5, "abcdefghij", -5);
167 test(S("abcdefghij"), 0, 5, "abcdefghijklmnopqrst", -15);
168 test(S("abcdefghij"), 0, 9, "", 9);
169 test(S("abcdefghij"), 0, 9, "abcde", 4);
170 test(S("abcdefghij"), 0, 9, "abcdefghij", -1);
171 test(S("abcdefghij"), 0, 9, "abcdefghijklmnopqrst", -11);
172 test(S("abcdefghij"), 0, 10, "", 10);
173 test(S("abcdefghij"), 0, 10, "abcde", 5);
174 test(S("abcdefghij"), 0, 10, "abcdefghij", 0);
175 test(S("abcdefghij"), 0, 10, "abcdefghijklmnopqrst", -10);
176 test(S("abcdefghij"), 0, 11, "", 10);
177 test(S("abcdefghij"), 0, 11, "abcde", 5);
178 test(S("abcdefghij"), 0, 11, "abcdefghij", 0);
179 test(S("abcdefghij"), 0, 11, "abcdefghijklmnopqrst", -10);
180 test(S("abcdefghij"), 1, 0, "", 0);
181 test(S("abcdefghij"), 1, 0, "abcde", -5);
182 test(S("abcdefghij"), 1, 0, "abcdefghij", -10);
183 test(S("abcdefghij"), 1, 0, "abcdefghijklmnopqrst", -20);
184 test(S("abcdefghij"), 1, 1, "", 1);
185 test(S("abcdefghij"), 1, 1, "abcde", 1);
186 test(S("abcdefghij"), 1, 1, "abcdefghij", 1);
187 test(S("abcdefghij"), 1, 1, "abcdefghijklmnopqrst", 1);
188 test(S("abcdefghij"), 1, 4, "", 4);
189 test(S("abcdefghij"), 1, 4, "abcde", 1);
190 test(S("abcdefghij"), 1, 4, "abcdefghij", 1);
191 test(S("abcdefghij"), 1, 4, "abcdefghijklmnopqrst", 1);
192 test(S("abcdefghij"), 1, 8, "", 8);
193 test(S("abcdefghij"), 1, 8, "abcde", 1);
194 test(S("abcdefghij"), 1, 8, "abcdefghij", 1);
195 test(S("abcdefghij"), 1, 8, "abcdefghijklmnopqrst", 1);
196 test(S("abcdefghij"), 1, 9, "", 9);
197 test(S("abcdefghij"), 1, 9, "abcde", 1);
198 test(S("abcdefghij"), 1, 9, "abcdefghij", 1);
199 test(S("abcdefghij"), 1, 9, "abcdefghijklmnopqrst", 1);
200 test(S("abcdefghij"), 1, 10, "", 9);
201 test(S("abcdefghij"), 1, 10, "abcde", 1);
202 test(S("abcdefghij"), 1, 10, "abcdefghij", 1);
203 test(S("abcdefghij"), 1, 10, "abcdefghijklmnopqrst", 1);
204 test(S("abcdefghij"), 5, 0, "", 0);
205 test(S("abcdefghij"), 5, 0, "abcde", -5);
206 test(S("abcdefghij"), 5, 0, "abcdefghij", -10);
207 test(S("abcdefghij"), 5, 0, "abcdefghijklmnopqrst", -20);
208 test(S("abcdefghij"), 5, 1, "", 1);
209 test(S("abcdefghij"), 5, 1, "abcde", 5);
210 test(S("abcdefghij"), 5, 1, "abcdefghij", 5);
211 test(S("abcdefghij"), 5, 1, "abcdefghijklmnopqrst", 5);
212 test(S("abcdefghij"), 5, 2, "", 2);
213 test(S("abcdefghij"), 5, 2, "abcde", 5);
214 test(S("abcdefghij"), 5, 2, "abcdefghij", 5);
215 test(S("abcdefghij"), 5, 2, "abcdefghijklmnopqrst", 5);
216 test(S("abcdefghij"), 5, 4, "", 4);
217 test(S("abcdefghij"), 5, 4, "abcde", 5);
218 test(S("abcdefghij"), 5, 4, "abcdefghij", 5);
219 test(S("abcdefghij"), 5, 4, "abcdefghijklmnopqrst", 5);
220 test(S("abcdefghij"), 5, 5, "", 5);
221 test(S("abcdefghij"), 5, 5, "abcde", 5);
222 test(S("abcdefghij"), 5, 5, "abcdefghij", 5);
223 test(S("abcdefghij"), 5, 5, "abcdefghijklmnopqrst", 5);
224 test(S("abcdefghij"), 5, 6, "", 5);
225 test(S("abcdefghij"), 5, 6, "abcde", 5);
226 test(S("abcdefghij"), 5, 6, "abcdefghij", 5);
227 test(S("abcdefghij"), 5, 6, "abcdefghijklmnopqrst", 5);
228 test(S("abcdefghij"), 9, 0, "", 0);
229 test(S("abcdefghij"), 9, 0, "abcde", -5);
230 test(S("abcdefghij"), 9, 0, "abcdefghij", -10);
231 test(S("abcdefghij"), 9, 0, "abcdefghijklmnopqrst", -20);
232 test(S("abcdefghij"), 9, 1, "", 1);
233 test(S("abcdefghij"), 9, 1, "abcde", 9);
234 test(S("abcdefghij"), 9, 1, "abcdefghij", 9);
235 test(S("abcdefghij"), 9, 1, "abcdefghijklmnopqrst", 9);
236 test(S("abcdefghij"), 9, 2, "", 1);
237 test(S("abcdefghij"), 9, 2, "abcde", 9);
238 test(S("abcdefghij"), 9, 2, "abcdefghij", 9);
239 test(S("abcdefghij"), 9, 2, "abcdefghijklmnopqrst", 9);
240 test(S("abcdefghij"), 10, 0, "", 0);
241 test(S("abcdefghij"), 10, 0, "abcde", -5);
242 test(S("abcdefghij"), 10, 0, "abcdefghij", -10);
243 test(S("abcdefghij"), 10, 0, "abcdefghijklmnopqrst", -20);
244 test(S("abcdefghij"), 10, 1, "", 0);
245 test(S("abcdefghij"), 10, 1, "abcde", -5);
246 test(S("abcdefghij"), 10, 1, "abcdefghij", -10);
247 test(S("abcdefghij"), 10, 1, "abcdefghijklmnopqrst", -20);
248 test(S("abcdefghij"), 11, 0, "", 0);
249 test(S("abcdefghij"), 11, 0, "abcde", 0);
250 test(S("abcdefghij"), 11, 0, "abcdefghij", 0);
251 test(S("abcdefghij"), 11, 0, "abcdefghijklmnopqrst", 0);
252}
253
254template <class S>
255TEST_CONSTEXPR_CXX20 void test2() {
256 test(S("abcdefghijklmnopqrst"), 0, 0, "", 0);
257 test(S("abcdefghijklmnopqrst"), 0, 0, "abcde", -5);
258 test(S("abcdefghijklmnopqrst"), 0, 0, "abcdefghij", -10);
259 test(S("abcdefghijklmnopqrst"), 0, 0, "abcdefghijklmnopqrst", -20);
260 test(S("abcdefghijklmnopqrst"), 0, 1, "", 1);
261 test(S("abcdefghijklmnopqrst"), 0, 1, "abcde", -4);
262 test(S("abcdefghijklmnopqrst"), 0, 1, "abcdefghij", -9);
263 test(S("abcdefghijklmnopqrst"), 0, 1, "abcdefghijklmnopqrst", -19);
264 test(S("abcdefghijklmnopqrst"), 0, 10, "", 10);
265 test(S("abcdefghijklmnopqrst"), 0, 10, "abcde", 5);
266 test(S("abcdefghijklmnopqrst"), 0, 10, "abcdefghij", 0);
267 test(S("abcdefghijklmnopqrst"), 0, 10, "abcdefghijklmnopqrst", -10);
268 test(S("abcdefghijklmnopqrst"), 0, 19, "", 19);
269 test(S("abcdefghijklmnopqrst"), 0, 19, "abcde", 14);
270 test(S("abcdefghijklmnopqrst"), 0, 19, "abcdefghij", 9);
271 test(S("abcdefghijklmnopqrst"), 0, 19, "abcdefghijklmnopqrst", -1);
272 test(S("abcdefghijklmnopqrst"), 0, 20, "", 20);
273 test(S("abcdefghijklmnopqrst"), 0, 20, "abcde", 15);
274 test(S("abcdefghijklmnopqrst"), 0, 20, "abcdefghij", 10);
275 test(S("abcdefghijklmnopqrst"), 0, 20, "abcdefghijklmnopqrst", 0);
276 test(S("abcdefghijklmnopqrst"), 0, 21, "", 20);
277 test(S("abcdefghijklmnopqrst"), 0, 21, "abcde", 15);
278 test(S("abcdefghijklmnopqrst"), 0, 21, "abcdefghij", 10);
279 test(S("abcdefghijklmnopqrst"), 0, 21, "abcdefghijklmnopqrst", 0);
280 test(S("abcdefghijklmnopqrst"), 1, 0, "", 0);
281 test(S("abcdefghijklmnopqrst"), 1, 0, "abcde", -5);
282 test(S("abcdefghijklmnopqrst"), 1, 0, "abcdefghij", -10);
283 test(S("abcdefghijklmnopqrst"), 1, 0, "abcdefghijklmnopqrst", -20);
284 test(S("abcdefghijklmnopqrst"), 1, 1, "", 1);
285 test(S("abcdefghijklmnopqrst"), 1, 1, "abcde", 1);
286 test(S("abcdefghijklmnopqrst"), 1, 1, "abcdefghij", 1);
287 test(S("abcdefghijklmnopqrst"), 1, 1, "abcdefghijklmnopqrst", 1);
288 test(S("abcdefghijklmnopqrst"), 1, 9, "", 9);
289 test(S("abcdefghijklmnopqrst"), 1, 9, "abcde", 1);
290 test(S("abcdefghijklmnopqrst"), 1, 9, "abcdefghij", 1);
291 test(S("abcdefghijklmnopqrst"), 1, 9, "abcdefghijklmnopqrst", 1);
292 test(S("abcdefghijklmnopqrst"), 1, 18, "", 18);
293 test(S("abcdefghijklmnopqrst"), 1, 18, "abcde", 1);
294 test(S("abcdefghijklmnopqrst"), 1, 18, "abcdefghij", 1);
295 test(S("abcdefghijklmnopqrst"), 1, 18, "abcdefghijklmnopqrst", 1);
296 test(S("abcdefghijklmnopqrst"), 1, 19, "", 19);
297 test(S("abcdefghijklmnopqrst"), 1, 19, "abcde", 1);
298 test(S("abcdefghijklmnopqrst"), 1, 19, "abcdefghij", 1);
299 test(S("abcdefghijklmnopqrst"), 1, 19, "abcdefghijklmnopqrst", 1);
300 test(S("abcdefghijklmnopqrst"), 1, 20, "", 19);
301 test(S("abcdefghijklmnopqrst"), 1, 20, "abcde", 1);
302 test(S("abcdefghijklmnopqrst"), 1, 20, "abcdefghij", 1);
303 test(S("abcdefghijklmnopqrst"), 1, 20, "abcdefghijklmnopqrst", 1);
304 test(S("abcdefghijklmnopqrst"), 10, 0, "", 0);
305 test(S("abcdefghijklmnopqrst"), 10, 0, "abcde", -5);
306 test(S("abcdefghijklmnopqrst"), 10, 0, "abcdefghij", -10);
307 test(S("abcdefghijklmnopqrst"), 10, 0, "abcdefghijklmnopqrst", -20);
308 test(S("abcdefghijklmnopqrst"), 10, 1, "", 1);
309 test(S("abcdefghijklmnopqrst"), 10, 1, "abcde", 10);
310 test(S("abcdefghijklmnopqrst"), 10, 1, "abcdefghij", 10);
311 test(S("abcdefghijklmnopqrst"), 10, 1, "abcdefghijklmnopqrst", 10);
312 test(S("abcdefghijklmnopqrst"), 10, 5, "", 5);
313 test(S("abcdefghijklmnopqrst"), 10, 5, "abcde", 10);
314 test(S("abcdefghijklmnopqrst"), 10, 5, "abcdefghij", 10);
315 test(S("abcdefghijklmnopqrst"), 10, 5, "abcdefghijklmnopqrst", 10);
316 test(S("abcdefghijklmnopqrst"), 10, 9, "", 9);
317 test(S("abcdefghijklmnopqrst"), 10, 9, "abcde", 10);
318 test(S("abcdefghijklmnopqrst"), 10, 9, "abcdefghij", 10);
319 test(S("abcdefghijklmnopqrst"), 10, 9, "abcdefghijklmnopqrst", 10);
320 test(S("abcdefghijklmnopqrst"), 10, 10, "", 10);
321 test(S("abcdefghijklmnopqrst"), 10, 10, "abcde", 10);
322 test(S("abcdefghijklmnopqrst"), 10, 10, "abcdefghij", 10);
323 test(S("abcdefghijklmnopqrst"), 10, 10, "abcdefghijklmnopqrst", 10);
324 test(S("abcdefghijklmnopqrst"), 10, 11, "", 10);
325 test(S("abcdefghijklmnopqrst"), 10, 11, "abcde", 10);
326 test(S("abcdefghijklmnopqrst"), 10, 11, "abcdefghij", 10);
327 test(S("abcdefghijklmnopqrst"), 10, 11, "abcdefghijklmnopqrst", 10);
328 test(S("abcdefghijklmnopqrst"), 19, 0, "", 0);
329 test(S("abcdefghijklmnopqrst"), 19, 0, "abcde", -5);
330 test(S("abcdefghijklmnopqrst"), 19, 0, "abcdefghij", -10);
331 test(S("abcdefghijklmnopqrst"), 19, 0, "abcdefghijklmnopqrst", -20);
332 test(S("abcdefghijklmnopqrst"), 19, 1, "", 1);
333 test(S("abcdefghijklmnopqrst"), 19, 1, "abcde", 19);
334 test(S("abcdefghijklmnopqrst"), 19, 1, "abcdefghij", 19);
335 test(S("abcdefghijklmnopqrst"), 19, 1, "abcdefghijklmnopqrst", 19);
336 test(S("abcdefghijklmnopqrst"), 19, 2, "", 1);
337 test(S("abcdefghijklmnopqrst"), 19, 2, "abcde", 19);
338 test(S("abcdefghijklmnopqrst"), 19, 2, "abcdefghij", 19);
339 test(S("abcdefghijklmnopqrst"), 19, 2, "abcdefghijklmnopqrst", 19);
340 test(S("abcdefghijklmnopqrst"), 20, 0, "", 0);
341 test(S("abcdefghijklmnopqrst"), 20, 0, "abcde", -5);
342 test(S("abcdefghijklmnopqrst"), 20, 0, "abcdefghij", -10);
343 test(S("abcdefghijklmnopqrst"), 20, 0, "abcdefghijklmnopqrst", -20);
344 test(S("abcdefghijklmnopqrst"), 20, 1, "", 0);
345 test(S("abcdefghijklmnopqrst"), 20, 1, "abcde", -5);
346 test(S("abcdefghijklmnopqrst"), 20, 1, "abcdefghij", -10);
347 test(S("abcdefghijklmnopqrst"), 20, 1, "abcdefghijklmnopqrst", -20);
348 test(S("abcdefghijklmnopqrst"), 21, 0, "", 0);
349 test(S("abcdefghijklmnopqrst"), 21, 0, "abcde", 0);
350 test(S("abcdefghijklmnopqrst"), 21, 0, "abcdefghij", 0);
351 test(S("abcdefghijklmnopqrst"), 21, 0, "abcdefghijklmnopqrst", 0);
352}
353
354template <class S>
355TEST_CONSTEXPR_CXX20 void test_string() {
356 test0<S>();
357 test1<S>();
358 test2<S>();
359}
360
361TEST_CONSTEXPR_CXX20 bool test() {
362 test_string<std::string>();
363#if TEST_STD_VER >= 11
364 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
365#endif
366
367 return true;
368}
369
370int main(int, char**) {
371 test();
372#if TEST_STD_VER > 17
373 static_assert(test());
374#endif
375
376 return 0;
377}
378

source code of libcxx/test/std/strings/basic.string/string.ops/string_compare/size_size_pointer.pass.cpp