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 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10
11 // <string_view>
12
13 // constexpr int compare(size_type pos1, size_type n1, basic_string_view str) const;
14
15 #include <string_view>
16 #include <cassert>
17 #include <stdexcept>
18
19 #include "test_macros.h"
20 #include "constexpr_char_traits.h"
21
sign(int x)22 int sign(int x) { return x > 0 ? 1 : (x < 0 ? -1 : 0); }
23
24 template <typename CharT>
test1(std::basic_string_view<CharT> sv1,std::size_t pos1,size_t n1,std::basic_string_view<CharT> sv2,int expected)25 void test1(
26 std::basic_string_view<CharT> sv1, std::size_t pos1, size_t n1, std::basic_string_view<CharT> sv2, int expected) {
27 #ifdef TEST_HAS_NO_EXCEPTIONS
28 if (pos1 <= sv1.size())
29 assert(sign(sv1.compare(pos1, n1, sv2)) == sign(expected));
30 #else
31 try {
32 assert(sign(sv1.compare(pos1, n1, sv2)) == sign(expected));
33 assert(pos1 <= sv1.size());
34 } catch (const std::out_of_range&) {
35 assert(pos1 > sv1.size());
36 }
37 #endif
38 }
39
40 template <typename CharT>
test(const CharT * s1,std::size_t pos1,size_t n1,const CharT * s2,int expected)41 void test(const CharT* s1, std::size_t pos1, size_t n1, const CharT* s2, int expected) {
42 typedef std::basic_string_view<CharT> string_view_t;
43 string_view_t sv1(s1);
44 string_view_t sv2(s2);
45 test1(sv1, pos1, n1, sv2, expected);
46 }
47
test0()48 void test0() {
49 test("", 0, 0, "", 0);
50 test("", 0, 0, "abcde", -5);
51 test("", 0, 0, "abcdefghij", -10);
52 test("", 0, 0, "abcdefghijklmnopqrst", -20);
53 test("", 0, 1, "", 0);
54 test("", 0, 1, "abcde", -5);
55 test("", 0, 1, "abcdefghij", -10);
56 test("", 0, 1, "abcdefghijklmnopqrst", -20);
57 test("", 1, 0, "", 0);
58 test("", 1, 0, "abcde", 0);
59 test("", 1, 0, "abcdefghij", 0);
60 test("", 1, 0, "abcdefghijklmnopqrst", 0);
61 test("abcde", 0, 0, "", 0);
62 test("abcde", 0, 0, "abcde", -5);
63 test("abcde", 0, 0, "abcdefghij", -10);
64 test("abcde", 0, 0, "abcdefghijklmnopqrst", -20);
65 test("abcde", 0, 1, "", 1);
66 test("abcde", 0, 1, "abcde", -4);
67 test("abcde", 0, 1, "abcdefghij", -9);
68 test("abcde", 0, 1, "abcdefghijklmnopqrst", -19);
69 test("abcde", 0, 2, "", 2);
70 test("abcde", 0, 2, "abcde", -3);
71 test("abcde", 0, 2, "abcdefghij", -8);
72 test("abcde", 0, 2, "abcdefghijklmnopqrst", -18);
73 test("abcde", 0, 4, "", 4);
74 test("abcde", 0, 4, "abcde", -1);
75 test("abcde", 0, 4, "abcdefghij", -6);
76 test("abcde", 0, 4, "abcdefghijklmnopqrst", -16);
77 test("abcde", 0, 5, "", 5);
78 test("abcde", 0, 5, "abcde", 0);
79 test("abcde", 0, 5, "abcdefghij", -5);
80 test("abcde", 0, 5, "abcdefghijklmnopqrst", -15);
81 test("abcde", 0, 6, "", 5);
82 test("abcde", 0, 6, "abcde", 0);
83 test("abcde", 0, 6, "abcdefghij", -5);
84 test("abcde", 0, 6, "abcdefghijklmnopqrst", -15);
85 test("abcde", 1, 0, "", 0);
86 test("abcde", 1, 0, "abcde", -5);
87 test("abcde", 1, 0, "abcdefghij", -10);
88 test("abcde", 1, 0, "abcdefghijklmnopqrst", -20);
89 test("abcde", 1, 1, "", 1);
90 test("abcde", 1, 1, "abcde", 1);
91 test("abcde", 1, 1, "abcdefghij", 1);
92 test("abcde", 1, 1, "abcdefghijklmnopqrst", 1);
93 test("abcde", 1, 2, "", 2);
94 test("abcde", 1, 2, "abcde", 1);
95 test("abcde", 1, 2, "abcdefghij", 1);
96 test("abcde", 1, 2, "abcdefghijklmnopqrst", 1);
97 test("abcde", 1, 3, "", 3);
98 test("abcde", 1, 3, "abcde", 1);
99 test("abcde", 1, 3, "abcdefghij", 1);
100 test("abcde", 1, 3, "abcdefghijklmnopqrst", 1);
101 test("abcde", 1, 4, "", 4);
102 test("abcde", 1, 4, "abcde", 1);
103 test("abcde", 1, 4, "abcdefghij", 1);
104 test("abcde", 1, 4, "abcdefghijklmnopqrst", 1);
105 test("abcde", 1, 5, "", 4);
106 test("abcde", 1, 5, "abcde", 1);
107 test("abcde", 1, 5, "abcdefghij", 1);
108 test("abcde", 1, 5, "abcdefghijklmnopqrst", 1);
109 test("abcde", 2, 0, "", 0);
110 test("abcde", 2, 0, "abcde", -5);
111 test("abcde", 2, 0, "abcdefghij", -10);
112 test("abcde", 2, 0, "abcdefghijklmnopqrst", -20);
113 test("abcde", 2, 1, "", 1);
114 test("abcde", 2, 1, "abcde", 2);
115 test("abcde", 2, 1, "abcdefghij", 2);
116 test("abcde", 2, 1, "abcdefghijklmnopqrst", 2);
117 test("abcde", 2, 2, "", 2);
118 test("abcde", 2, 2, "abcde", 2);
119 test("abcde", 2, 2, "abcdefghij", 2);
120 test("abcde", 2, 2, "abcdefghijklmnopqrst", 2);
121 test("abcde", 2, 3, "", 3);
122 test("abcde", 2, 3, "abcde", 2);
123 test("abcde", 2, 3, "abcdefghij", 2);
124 test("abcde", 2, 3, "abcdefghijklmnopqrst", 2);
125 test("abcde", 2, 4, "", 3);
126 test("abcde", 2, 4, "abcde", 2);
127 test("abcde", 2, 4, "abcdefghij", 2);
128 test("abcde", 2, 4, "abcdefghijklmnopqrst", 2);
129 test("abcde", 4, 0, "", 0);
130 test("abcde", 4, 0, "abcde", -5);
131 test("abcde", 4, 0, "abcdefghij", -10);
132 test("abcde", 4, 0, "abcdefghijklmnopqrst", -20);
133 test("abcde", 4, 1, "", 1);
134 test("abcde", 4, 1, "abcde", 4);
135 test("abcde", 4, 1, "abcdefghij", 4);
136 test("abcde", 4, 1, "abcdefghijklmnopqrst", 4);
137 test("abcde", 4, 2, "", 1);
138 test("abcde", 4, 2, "abcde", 4);
139 test("abcde", 4, 2, "abcdefghij", 4);
140 test("abcde", 4, 2, "abcdefghijklmnopqrst", 4);
141 test("abcde", 5, 0, "", 0);
142 test("abcde", 5, 0, "abcde", -5);
143 test("abcde", 5, 0, "abcdefghij", -10);
144 test("abcde", 5, 0, "abcdefghijklmnopqrst", -20);
145 test("abcde", 5, 1, "", 0);
146 test("abcde", 5, 1, "abcde", -5);
147 test("abcde", 5, 1, "abcdefghij", -10);
148 test("abcde", 5, 1, "abcdefghijklmnopqrst", -20);
149 }
150
test1()151 void test1() {
152 test("abcde", 6, 0, "", 0);
153 test("abcde", 6, 0, "abcde", 0);
154 test("abcde", 6, 0, "abcdefghij", 0);
155 test("abcde", 6, 0, "abcdefghijklmnopqrst", 0);
156 test("abcdefghij", 0, 0, "", 0);
157 test("abcdefghij", 0, 0, "abcde", -5);
158 test("abcdefghij", 0, 0, "abcdefghij", -10);
159 test("abcdefghij", 0, 0, "abcdefghijklmnopqrst", -20);
160 test("abcdefghij", 0, 1, "", 1);
161 test("abcdefghij", 0, 1, "abcde", -4);
162 test("abcdefghij", 0, 1, "abcdefghij", -9);
163 test("abcdefghij", 0, 1, "abcdefghijklmnopqrst", -19);
164 test("abcdefghij", 0, 5, "", 5);
165 test("abcdefghij", 0, 5, "abcde", 0);
166 test("abcdefghij", 0, 5, "abcdefghij", -5);
167 test("abcdefghij", 0, 5, "abcdefghijklmnopqrst", -15);
168 test("abcdefghij", 0, 9, "", 9);
169 test("abcdefghij", 0, 9, "abcde", 4);
170 test("abcdefghij", 0, 9, "abcdefghij", -1);
171 test("abcdefghij", 0, 9, "abcdefghijklmnopqrst", -11);
172 test("abcdefghij", 0, 10, "", 10);
173 test("abcdefghij", 0, 10, "abcde", 5);
174 test("abcdefghij", 0, 10, "abcdefghij", 0);
175 test("abcdefghij", 0, 10, "abcdefghijklmnopqrst", -10);
176 test("abcdefghij", 0, 11, "", 10);
177 test("abcdefghij", 0, 11, "abcde", 5);
178 test("abcdefghij", 0, 11, "abcdefghij", 0);
179 test("abcdefghij", 0, 11, "abcdefghijklmnopqrst", -10);
180 test("abcdefghij", 1, 0, "", 0);
181 test("abcdefghij", 1, 0, "abcde", -5);
182 test("abcdefghij", 1, 0, "abcdefghij", -10);
183 test("abcdefghij", 1, 0, "abcdefghijklmnopqrst", -20);
184 test("abcdefghij", 1, 1, "", 1);
185 test("abcdefghij", 1, 1, "abcde", 1);
186 test("abcdefghij", 1, 1, "abcdefghij", 1);
187 test("abcdefghij", 1, 1, "abcdefghijklmnopqrst", 1);
188 test("abcdefghij", 1, 4, "", 4);
189 test("abcdefghij", 1, 4, "abcde", 1);
190 test("abcdefghij", 1, 4, "abcdefghij", 1);
191 test("abcdefghij", 1, 4, "abcdefghijklmnopqrst", 1);
192 test("abcdefghij", 1, 8, "", 8);
193 test("abcdefghij", 1, 8, "abcde", 1);
194 test("abcdefghij", 1, 8, "abcdefghij", 1);
195 test("abcdefghij", 1, 8, "abcdefghijklmnopqrst", 1);
196 test("abcdefghij", 1, 9, "", 9);
197 test("abcdefghij", 1, 9, "abcde", 1);
198 test("abcdefghij", 1, 9, "abcdefghij", 1);
199 test("abcdefghij", 1, 9, "abcdefghijklmnopqrst", 1);
200 test("abcdefghij", 1, 10, "", 9);
201 test("abcdefghij", 1, 10, "abcde", 1);
202 test("abcdefghij", 1, 10, "abcdefghij", 1);
203 test("abcdefghij", 1, 10, "abcdefghijklmnopqrst", 1);
204 test("abcdefghij", 5, 0, "", 0);
205 test("abcdefghij", 5, 0, "abcde", -5);
206 test("abcdefghij", 5, 0, "abcdefghij", -10);
207 test("abcdefghij", 5, 0, "abcdefghijklmnopqrst", -20);
208 test("abcdefghij", 5, 1, "", 1);
209 test("abcdefghij", 5, 1, "abcde", 5);
210 test("abcdefghij", 5, 1, "abcdefghij", 5);
211 test("abcdefghij", 5, 1, "abcdefghijklmnopqrst", 5);
212 test("abcdefghij", 5, 2, "", 2);
213 test("abcdefghij", 5, 2, "abcde", 5);
214 test("abcdefghij", 5, 2, "abcdefghij", 5);
215 test("abcdefghij", 5, 2, "abcdefghijklmnopqrst", 5);
216 test("abcdefghij", 5, 4, "", 4);
217 test("abcdefghij", 5, 4, "abcde", 5);
218 test("abcdefghij", 5, 4, "abcdefghij", 5);
219 test("abcdefghij", 5, 4, "abcdefghijklmnopqrst", 5);
220 test("abcdefghij", 5, 5, "", 5);
221 test("abcdefghij", 5, 5, "abcde", 5);
222 test("abcdefghij", 5, 5, "abcdefghij", 5);
223 test("abcdefghij", 5, 5, "abcdefghijklmnopqrst", 5);
224 test("abcdefghij", 5, 6, "", 5);
225 test("abcdefghij", 5, 6, "abcde", 5);
226 test("abcdefghij", 5, 6, "abcdefghij", 5);
227 test("abcdefghij", 5, 6, "abcdefghijklmnopqrst", 5);
228 test("abcdefghij", 9, 0, "", 0);
229 test("abcdefghij", 9, 0, "abcde", -5);
230 test("abcdefghij", 9, 0, "abcdefghij", -10);
231 test("abcdefghij", 9, 0, "abcdefghijklmnopqrst", -20);
232 test("abcdefghij", 9, 1, "", 1);
233 test("abcdefghij", 9, 1, "abcde", 9);
234 test("abcdefghij", 9, 1, "abcdefghij", 9);
235 test("abcdefghij", 9, 1, "abcdefghijklmnopqrst", 9);
236 test("abcdefghij", 9, 2, "", 1);
237 test("abcdefghij", 9, 2, "abcde", 9);
238 test("abcdefghij", 9, 2, "abcdefghij", 9);
239 test("abcdefghij", 9, 2, "abcdefghijklmnopqrst", 9);
240 test("abcdefghij", 10, 0, "", 0);
241 test("abcdefghij", 10, 0, "abcde", -5);
242 test("abcdefghij", 10, 0, "abcdefghij", -10);
243 test("abcdefghij", 10, 0, "abcdefghijklmnopqrst", -20);
244 test("abcdefghij", 10, 1, "", 0);
245 test("abcdefghij", 10, 1, "abcde", -5);
246 test("abcdefghij", 10, 1, "abcdefghij", -10);
247 test("abcdefghij", 10, 1, "abcdefghijklmnopqrst", -20);
248 test("abcdefghij", 11, 0, "", 0);
249 test("abcdefghij", 11, 0, "abcde", 0);
250 test("abcdefghij", 11, 0, "abcdefghij", 0);
251 test("abcdefghij", 11, 0, "abcdefghijklmnopqrst", 0);
252 }
253
test2()254 void test2() {
255 test("abcdefghijklmnopqrst", 0, 0, "", 0);
256 test("abcdefghijklmnopqrst", 0, 0, "abcde", -5);
257 test("abcdefghijklmnopqrst", 0, 0, "abcdefghij", -10);
258 test("abcdefghijklmnopqrst", 0, 0, "abcdefghijklmnopqrst", -20);
259 test("abcdefghijklmnopqrst", 0, 1, "", 1);
260 test("abcdefghijklmnopqrst", 0, 1, "abcde", -4);
261 test("abcdefghijklmnopqrst", 0, 1, "abcdefghij", -9);
262 test("abcdefghijklmnopqrst", 0, 1, "abcdefghijklmnopqrst", -19);
263 test("abcdefghijklmnopqrst", 0, 10, "", 10);
264 test("abcdefghijklmnopqrst", 0, 10, "abcde", 5);
265 test("abcdefghijklmnopqrst", 0, 10, "abcdefghij", 0);
266 test("abcdefghijklmnopqrst", 0, 10, "abcdefghijklmnopqrst", -10);
267 test("abcdefghijklmnopqrst", 0, 19, "", 19);
268 test("abcdefghijklmnopqrst", 0, 19, "abcde", 14);
269 test("abcdefghijklmnopqrst", 0, 19, "abcdefghij", 9);
270 test("abcdefghijklmnopqrst", 0, 19, "abcdefghijklmnopqrst", -1);
271 test("abcdefghijklmnopqrst", 0, 20, "", 20);
272 test("abcdefghijklmnopqrst", 0, 20, "abcde", 15);
273 test("abcdefghijklmnopqrst", 0, 20, "abcdefghij", 10);
274 test("abcdefghijklmnopqrst", 0, 20, "abcdefghijklmnopqrst", 0);
275 test("abcdefghijklmnopqrst", 0, 21, "", 20);
276 test("abcdefghijklmnopqrst", 0, 21, "abcde", 15);
277 test("abcdefghijklmnopqrst", 0, 21, "abcdefghij", 10);
278 test("abcdefghijklmnopqrst", 0, 21, "abcdefghijklmnopqrst", 0);
279 test("abcdefghijklmnopqrst", 1, 0, "", 0);
280 test("abcdefghijklmnopqrst", 1, 0, "abcde", -5);
281 test("abcdefghijklmnopqrst", 1, 0, "abcdefghij", -10);
282 test("abcdefghijklmnopqrst", 1, 0, "abcdefghijklmnopqrst", -20);
283 test("abcdefghijklmnopqrst", 1, 1, "", 1);
284 test("abcdefghijklmnopqrst", 1, 1, "abcde", 1);
285 test("abcdefghijklmnopqrst", 1, 1, "abcdefghij", 1);
286 test("abcdefghijklmnopqrst", 1, 1, "abcdefghijklmnopqrst", 1);
287 test("abcdefghijklmnopqrst", 1, 9, "", 9);
288 test("abcdefghijklmnopqrst", 1, 9, "abcde", 1);
289 test("abcdefghijklmnopqrst", 1, 9, "abcdefghij", 1);
290 test("abcdefghijklmnopqrst", 1, 9, "abcdefghijklmnopqrst", 1);
291 test("abcdefghijklmnopqrst", 1, 18, "", 18);
292 test("abcdefghijklmnopqrst", 1, 18, "abcde", 1);
293 test("abcdefghijklmnopqrst", 1, 18, "abcdefghij", 1);
294 test("abcdefghijklmnopqrst", 1, 18, "abcdefghijklmnopqrst", 1);
295 test("abcdefghijklmnopqrst", 1, 19, "", 19);
296 test("abcdefghijklmnopqrst", 1, 19, "abcde", 1);
297 test("abcdefghijklmnopqrst", 1, 19, "abcdefghij", 1);
298 test("abcdefghijklmnopqrst", 1, 19, "abcdefghijklmnopqrst", 1);
299 test("abcdefghijklmnopqrst", 1, 20, "", 19);
300 test("abcdefghijklmnopqrst", 1, 20, "abcde", 1);
301 test("abcdefghijklmnopqrst", 1, 20, "abcdefghij", 1);
302 test("abcdefghijklmnopqrst", 1, 20, "abcdefghijklmnopqrst", 1);
303 test("abcdefghijklmnopqrst", 10, 0, "", 0);
304 test("abcdefghijklmnopqrst", 10, 0, "abcde", -5);
305 test("abcdefghijklmnopqrst", 10, 0, "abcdefghij", -10);
306 test("abcdefghijklmnopqrst", 10, 0, "abcdefghijklmnopqrst", -20);
307 test("abcdefghijklmnopqrst", 10, 1, "", 1);
308 test("abcdefghijklmnopqrst", 10, 1, "abcde", 10);
309 test("abcdefghijklmnopqrst", 10, 1, "abcdefghij", 10);
310 test("abcdefghijklmnopqrst", 10, 1, "abcdefghijklmnopqrst", 10);
311 test("abcdefghijklmnopqrst", 10, 5, "", 5);
312 test("abcdefghijklmnopqrst", 10, 5, "abcde", 10);
313 test("abcdefghijklmnopqrst", 10, 5, "abcdefghij", 10);
314 test("abcdefghijklmnopqrst", 10, 5, "abcdefghijklmnopqrst", 10);
315 test("abcdefghijklmnopqrst", 10, 9, "", 9);
316 test("abcdefghijklmnopqrst", 10, 9, "abcde", 10);
317 test("abcdefghijklmnopqrst", 10, 9, "abcdefghij", 10);
318 test("abcdefghijklmnopqrst", 10, 9, "abcdefghijklmnopqrst", 10);
319 test("abcdefghijklmnopqrst", 10, 10, "", 10);
320 test("abcdefghijklmnopqrst", 10, 10, "abcde", 10);
321 test("abcdefghijklmnopqrst", 10, 10, "abcdefghij", 10);
322 test("abcdefghijklmnopqrst", 10, 10, "abcdefghijklmnopqrst", 10);
323 test("abcdefghijklmnopqrst", 10, 11, "", 10);
324 test("abcdefghijklmnopqrst", 10, 11, "abcde", 10);
325 test("abcdefghijklmnopqrst", 10, 11, "abcdefghij", 10);
326 test("abcdefghijklmnopqrst", 10, 11, "abcdefghijklmnopqrst", 10);
327 test("abcdefghijklmnopqrst", 19, 0, "", 0);
328 test("abcdefghijklmnopqrst", 19, 0, "abcde", -5);
329 test("abcdefghijklmnopqrst", 19, 0, "abcdefghij", -10);
330 test("abcdefghijklmnopqrst", 19, 0, "abcdefghijklmnopqrst", -20);
331 test("abcdefghijklmnopqrst", 19, 1, "", 1);
332 test("abcdefghijklmnopqrst", 19, 1, "abcde", 19);
333 test("abcdefghijklmnopqrst", 19, 1, "abcdefghij", 19);
334 test("abcdefghijklmnopqrst", 19, 1, "abcdefghijklmnopqrst", 19);
335 test("abcdefghijklmnopqrst", 19, 2, "", 1);
336 test("abcdefghijklmnopqrst", 19, 2, "abcde", 19);
337 test("abcdefghijklmnopqrst", 19, 2, "abcdefghij", 19);
338 test("abcdefghijklmnopqrst", 19, 2, "abcdefghijklmnopqrst", 19);
339 test("abcdefghijklmnopqrst", 20, 0, "", 0);
340 test("abcdefghijklmnopqrst", 20, 0, "abcde", -5);
341 test("abcdefghijklmnopqrst", 20, 0, "abcdefghij", -10);
342 test("abcdefghijklmnopqrst", 20, 0, "abcdefghijklmnopqrst", -20);
343 test("abcdefghijklmnopqrst", 20, 1, "", 0);
344 test("abcdefghijklmnopqrst", 20, 1, "abcde", -5);
345 test("abcdefghijklmnopqrst", 20, 1, "abcdefghij", -10);
346 test("abcdefghijklmnopqrst", 20, 1, "abcdefghijklmnopqrst", -20);
347 test("abcdefghijklmnopqrst", 21, 0, "", 0);
348 test("abcdefghijklmnopqrst", 21, 0, "abcde", 0);
349 test("abcdefghijklmnopqrst", 21, 0, "abcdefghij", 0);
350 test("abcdefghijklmnopqrst", 21, 0, "abcdefghijklmnopqrst", 0);
351 }
352
main(int,char **)353 int main(int, char**) {
354 test0();
355 test1();
356 test2();
357
358 {
359 test("abcde", 5, 1, "", 0);
360 test("abcde", 2, 4, "", 3);
361 test("abcde", 2, 4, "abcde", 2);
362 test("ABCde", 2, 4, "abcde", -1);
363 }
364
365 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
366 {
367 test(L"abcde", 5, 1, L"", 0);
368 test(L"abcde", 2, 4, L"", 3);
369 test(L"abcde", 2, 4, L"abcde", 2);
370 test(L"ABCde", 2, 4, L"abcde", -1);
371 }
372 #endif
373
374 #if TEST_STD_VER >= 11
375 {
376 test(u"abcde", 5, 1, u"", 0);
377 test(u"abcde", 2, 4, u"", 3);
378 test(u"abcde", 2, 4, u"abcde", 2);
379 test(u"ABCde", 2, 4, u"abcde", -1);
380 }
381
382 {
383 test(U"abcde", 5, 1, U"", 0);
384 test(U"abcde", 2, 4, U"", 3);
385 test(U"abcde", 2, 4, U"abcde", 2);
386 test(U"ABCde", 2, 4, U"abcde", -1);
387 }
388 #endif
389
390 #if TEST_STD_VER > 11
391 {
392 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
393 constexpr SV sv1{"abcde", 5};
394 constexpr SV sv2{"abcde", 0};
395 static_assert(sv1.compare(5, 1, sv2) == 0, "");
396 static_assert(sv1.compare(2, 4, sv2) > 0, "");
397 }
398 #endif
399
400 return 0;
401 }
402