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, const charT* s) 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,const CharT * s,int expected)25 void test1(std::basic_string_view<CharT> sv1, std::size_t pos1, size_t n1, const CharT* s, int expected) {
26 #ifdef TEST_HAS_NO_EXCEPTIONS
27 if (pos1 <= sv1.size())
28 assert(sign(sv1.compare(pos1, n1, s)) == sign(expected));
29 #else
30 try {
31 assert(sign(sv1.compare(pos1, n1, s)) == sign(expected));
32 assert(pos1 <= sv1.size());
33 } catch (const std::out_of_range&) {
34 assert(pos1 > sv1.size());
35 }
36 #endif
37 }
38
39 template <typename CharT>
test(const CharT * s1,std::size_t pos1,size_t n1,const CharT * s2,int expected)40 void test(const CharT* s1, std::size_t pos1, size_t n1, const CharT* s2, int expected) {
41 typedef std::basic_string_view<CharT> string_view_t;
42 string_view_t sv1(s1);
43 test1(sv1, pos1, n1, s2, expected);
44 }
45
test0()46 void test0() {
47 test("", 0, 0, "", 0);
48 test("", 0, 0, "abcde", -5);
49 test("", 0, 0, "abcdefghij", -10);
50 test("", 0, 0, "abcdefghijklmnopqrst", -20);
51 test("", 0, 1, "", 0);
52 test("", 0, 1, "abcde", -5);
53 test("", 0, 1, "abcdefghij", -10);
54 test("", 0, 1, "abcdefghijklmnopqrst", -20);
55 test("", 1, 0, "", 0);
56 test("", 1, 0, "abcde", 0);
57 test("", 1, 0, "abcdefghij", 0);
58 test("", 1, 0, "abcdefghijklmnopqrst", 0);
59 test("abcde", 0, 0, "", 0);
60 test("abcde", 0, 0, "abcde", -5);
61 test("abcde", 0, 0, "abcdefghij", -10);
62 test("abcde", 0, 0, "abcdefghijklmnopqrst", -20);
63 test("abcde", 0, 1, "", 1);
64 test("abcde", 0, 1, "abcde", -4);
65 test("abcde", 0, 1, "abcdefghij", -9);
66 test("abcde", 0, 1, "abcdefghijklmnopqrst", -19);
67 test("abcde", 0, 2, "", 2);
68 test("abcde", 0, 2, "abcde", -3);
69 test("abcde", 0, 2, "abcdefghij", -8);
70 test("abcde", 0, 2, "abcdefghijklmnopqrst", -18);
71 test("abcde", 0, 4, "", 4);
72 test("abcde", 0, 4, "abcde", -1);
73 test("abcde", 0, 4, "abcdefghij", -6);
74 test("abcde", 0, 4, "abcdefghijklmnopqrst", -16);
75 test("abcde", 0, 5, "", 5);
76 test("abcde", 0, 5, "abcde", 0);
77 test("abcde", 0, 5, "abcdefghij", -5);
78 test("abcde", 0, 5, "abcdefghijklmnopqrst", -15);
79 test("abcde", 0, 6, "", 5);
80 test("abcde", 0, 6, "abcde", 0);
81 test("abcde", 0, 6, "abcdefghij", -5);
82 test("abcde", 0, 6, "abcdefghijklmnopqrst", -15);
83 test("abcde", 1, 0, "", 0);
84 test("abcde", 1, 0, "abcde", -5);
85 test("abcde", 1, 0, "abcdefghij", -10);
86 test("abcde", 1, 0, "abcdefghijklmnopqrst", -20);
87 test("abcde", 1, 1, "", 1);
88 test("abcde", 1, 1, "abcde", 1);
89 test("abcde", 1, 1, "abcdefghij", 1);
90 test("abcde", 1, 1, "abcdefghijklmnopqrst", 1);
91 test("abcde", 1, 2, "", 2);
92 test("abcde", 1, 2, "abcde", 1);
93 test("abcde", 1, 2, "abcdefghij", 1);
94 test("abcde", 1, 2, "abcdefghijklmnopqrst", 1);
95 test("abcde", 1, 3, "", 3);
96 test("abcde", 1, 3, "abcde", 1);
97 test("abcde", 1, 3, "abcdefghij", 1);
98 test("abcde", 1, 3, "abcdefghijklmnopqrst", 1);
99 test("abcde", 1, 4, "", 4);
100 test("abcde", 1, 4, "abcde", 1);
101 test("abcde", 1, 4, "abcdefghij", 1);
102 test("abcde", 1, 4, "abcdefghijklmnopqrst", 1);
103 test("abcde", 1, 5, "", 4);
104 test("abcde", 1, 5, "abcde", 1);
105 test("abcde", 1, 5, "abcdefghij", 1);
106 test("abcde", 1, 5, "abcdefghijklmnopqrst", 1);
107 test("abcde", 2, 0, "", 0);
108 test("abcde", 2, 0, "abcde", -5);
109 test("abcde", 2, 0, "abcdefghij", -10);
110 test("abcde", 2, 0, "abcdefghijklmnopqrst", -20);
111 test("abcde", 2, 1, "", 1);
112 test("abcde", 2, 1, "abcde", 2);
113 test("abcde", 2, 1, "abcdefghij", 2);
114 test("abcde", 2, 1, "abcdefghijklmnopqrst", 2);
115 test("abcde", 2, 2, "", 2);
116 test("abcde", 2, 2, "abcde", 2);
117 test("abcde", 2, 2, "abcdefghij", 2);
118 test("abcde", 2, 2, "abcdefghijklmnopqrst", 2);
119 test("abcde", 2, 3, "", 3);
120 test("abcde", 2, 3, "abcde", 2);
121 test("abcde", 2, 3, "abcdefghij", 2);
122 test("abcde", 2, 3, "abcdefghijklmnopqrst", 2);
123 test("abcde", 2, 4, "", 3);
124 test("abcde", 2, 4, "abcde", 2);
125 test("abcde", 2, 4, "abcdefghij", 2);
126 test("abcde", 2, 4, "abcdefghijklmnopqrst", 2);
127 test("abcde", 4, 0, "", 0);
128 test("abcde", 4, 0, "abcde", -5);
129 test("abcde", 4, 0, "abcdefghij", -10);
130 test("abcde", 4, 0, "abcdefghijklmnopqrst", -20);
131 test("abcde", 4, 1, "", 1);
132 test("abcde", 4, 1, "abcde", 4);
133 test("abcde", 4, 1, "abcdefghij", 4);
134 test("abcde", 4, 1, "abcdefghijklmnopqrst", 4);
135 test("abcde", 4, 2, "", 1);
136 test("abcde", 4, 2, "abcde", 4);
137 test("abcde", 4, 2, "abcdefghij", 4);
138 test("abcde", 4, 2, "abcdefghijklmnopqrst", 4);
139 test("abcde", 5, 0, "", 0);
140 test("abcde", 5, 0, "abcde", -5);
141 test("abcde", 5, 0, "abcdefghij", -10);
142 test("abcde", 5, 0, "abcdefghijklmnopqrst", -20);
143 test("abcde", 5, 1, "", 0);
144 test("abcde", 5, 1, "abcde", -5);
145 test("abcde", 5, 1, "abcdefghij", -10);
146 test("abcde", 5, 1, "abcdefghijklmnopqrst", -20);
147 }
148
test1()149 void test1() {
150 test("abcde", 6, 0, "", 0);
151 test("abcde", 6, 0, "abcde", 0);
152 test("abcde", 6, 0, "abcdefghij", 0);
153 test("abcde", 6, 0, "abcdefghijklmnopqrst", 0);
154 test("abcdefghij", 0, 0, "", 0);
155 test("abcdefghij", 0, 0, "abcde", -5);
156 test("abcdefghij", 0, 0, "abcdefghij", -10);
157 test("abcdefghij", 0, 0, "abcdefghijklmnopqrst", -20);
158 test("abcdefghij", 0, 1, "", 1);
159 test("abcdefghij", 0, 1, "abcde", -4);
160 test("abcdefghij", 0, 1, "abcdefghij", -9);
161 test("abcdefghij", 0, 1, "abcdefghijklmnopqrst", -19);
162 test("abcdefghij", 0, 5, "", 5);
163 test("abcdefghij", 0, 5, "abcde", 0);
164 test("abcdefghij", 0, 5, "abcdefghij", -5);
165 test("abcdefghij", 0, 5, "abcdefghijklmnopqrst", -15);
166 test("abcdefghij", 0, 9, "", 9);
167 test("abcdefghij", 0, 9, "abcde", 4);
168 test("abcdefghij", 0, 9, "abcdefghij", -1);
169 test("abcdefghij", 0, 9, "abcdefghijklmnopqrst", -11);
170 test("abcdefghij", 0, 10, "", 10);
171 test("abcdefghij", 0, 10, "abcde", 5);
172 test("abcdefghij", 0, 10, "abcdefghij", 0);
173 test("abcdefghij", 0, 10, "abcdefghijklmnopqrst", -10);
174 test("abcdefghij", 0, 11, "", 10);
175 test("abcdefghij", 0, 11, "abcde", 5);
176 test("abcdefghij", 0, 11, "abcdefghij", 0);
177 test("abcdefghij", 0, 11, "abcdefghijklmnopqrst", -10);
178 test("abcdefghij", 1, 0, "", 0);
179 test("abcdefghij", 1, 0, "abcde", -5);
180 test("abcdefghij", 1, 0, "abcdefghij", -10);
181 test("abcdefghij", 1, 0, "abcdefghijklmnopqrst", -20);
182 test("abcdefghij", 1, 1, "", 1);
183 test("abcdefghij", 1, 1, "abcde", 1);
184 test("abcdefghij", 1, 1, "abcdefghij", 1);
185 test("abcdefghij", 1, 1, "abcdefghijklmnopqrst", 1);
186 test("abcdefghij", 1, 4, "", 4);
187 test("abcdefghij", 1, 4, "abcde", 1);
188 test("abcdefghij", 1, 4, "abcdefghij", 1);
189 test("abcdefghij", 1, 4, "abcdefghijklmnopqrst", 1);
190 test("abcdefghij", 1, 8, "", 8);
191 test("abcdefghij", 1, 8, "abcde", 1);
192 test("abcdefghij", 1, 8, "abcdefghij", 1);
193 test("abcdefghij", 1, 8, "abcdefghijklmnopqrst", 1);
194 test("abcdefghij", 1, 9, "", 9);
195 test("abcdefghij", 1, 9, "abcde", 1);
196 test("abcdefghij", 1, 9, "abcdefghij", 1);
197 test("abcdefghij", 1, 9, "abcdefghijklmnopqrst", 1);
198 test("abcdefghij", 1, 10, "", 9);
199 test("abcdefghij", 1, 10, "abcde", 1);
200 test("abcdefghij", 1, 10, "abcdefghij", 1);
201 test("abcdefghij", 1, 10, "abcdefghijklmnopqrst", 1);
202 test("abcdefghij", 5, 0, "", 0);
203 test("abcdefghij", 5, 0, "abcde", -5);
204 test("abcdefghij", 5, 0, "abcdefghij", -10);
205 test("abcdefghij", 5, 0, "abcdefghijklmnopqrst", -20);
206 test("abcdefghij", 5, 1, "", 1);
207 test("abcdefghij", 5, 1, "abcde", 5);
208 test("abcdefghij", 5, 1, "abcdefghij", 5);
209 test("abcdefghij", 5, 1, "abcdefghijklmnopqrst", 5);
210 test("abcdefghij", 5, 2, "", 2);
211 test("abcdefghij", 5, 2, "abcde", 5);
212 test("abcdefghij", 5, 2, "abcdefghij", 5);
213 test("abcdefghij", 5, 2, "abcdefghijklmnopqrst", 5);
214 test("abcdefghij", 5, 4, "", 4);
215 test("abcdefghij", 5, 4, "abcde", 5);
216 test("abcdefghij", 5, 4, "abcdefghij", 5);
217 test("abcdefghij", 5, 4, "abcdefghijklmnopqrst", 5);
218 test("abcdefghij", 5, 5, "", 5);
219 test("abcdefghij", 5, 5, "abcde", 5);
220 test("abcdefghij", 5, 5, "abcdefghij", 5);
221 test("abcdefghij", 5, 5, "abcdefghijklmnopqrst", 5);
222 test("abcdefghij", 5, 6, "", 5);
223 test("abcdefghij", 5, 6, "abcde", 5);
224 test("abcdefghij", 5, 6, "abcdefghij", 5);
225 test("abcdefghij", 5, 6, "abcdefghijklmnopqrst", 5);
226 test("abcdefghij", 9, 0, "", 0);
227 test("abcdefghij", 9, 0, "abcde", -5);
228 test("abcdefghij", 9, 0, "abcdefghij", -10);
229 test("abcdefghij", 9, 0, "abcdefghijklmnopqrst", -20);
230 test("abcdefghij", 9, 1, "", 1);
231 test("abcdefghij", 9, 1, "abcde", 9);
232 test("abcdefghij", 9, 1, "abcdefghij", 9);
233 test("abcdefghij", 9, 1, "abcdefghijklmnopqrst", 9);
234 test("abcdefghij", 9, 2, "", 1);
235 test("abcdefghij", 9, 2, "abcde", 9);
236 test("abcdefghij", 9, 2, "abcdefghij", 9);
237 test("abcdefghij", 9, 2, "abcdefghijklmnopqrst", 9);
238 test("abcdefghij", 10, 0, "", 0);
239 test("abcdefghij", 10, 0, "abcde", -5);
240 test("abcdefghij", 10, 0, "abcdefghij", -10);
241 test("abcdefghij", 10, 0, "abcdefghijklmnopqrst", -20);
242 test("abcdefghij", 10, 1, "", 0);
243 test("abcdefghij", 10, 1, "abcde", -5);
244 test("abcdefghij", 10, 1, "abcdefghij", -10);
245 test("abcdefghij", 10, 1, "abcdefghijklmnopqrst", -20);
246 test("abcdefghij", 11, 0, "", 0);
247 test("abcdefghij", 11, 0, "abcde", 0);
248 test("abcdefghij", 11, 0, "abcdefghij", 0);
249 test("abcdefghij", 11, 0, "abcdefghijklmnopqrst", 0);
250 }
251
test2()252 void test2() {
253 test("abcdefghijklmnopqrst", 0, 0, "", 0);
254 test("abcdefghijklmnopqrst", 0, 0, "abcde", -5);
255 test("abcdefghijklmnopqrst", 0, 0, "abcdefghij", -10);
256 test("abcdefghijklmnopqrst", 0, 0, "abcdefghijklmnopqrst", -20);
257 test("abcdefghijklmnopqrst", 0, 1, "", 1);
258 test("abcdefghijklmnopqrst", 0, 1, "abcde", -4);
259 test("abcdefghijklmnopqrst", 0, 1, "abcdefghij", -9);
260 test("abcdefghijklmnopqrst", 0, 1, "abcdefghijklmnopqrst", -19);
261 test("abcdefghijklmnopqrst", 0, 10, "", 10);
262 test("abcdefghijklmnopqrst", 0, 10, "abcde", 5);
263 test("abcdefghijklmnopqrst", 0, 10, "abcdefghij", 0);
264 test("abcdefghijklmnopqrst", 0, 10, "abcdefghijklmnopqrst", -10);
265 test("abcdefghijklmnopqrst", 0, 19, "", 19);
266 test("abcdefghijklmnopqrst", 0, 19, "abcde", 14);
267 test("abcdefghijklmnopqrst", 0, 19, "abcdefghij", 9);
268 test("abcdefghijklmnopqrst", 0, 19, "abcdefghijklmnopqrst", -1);
269 test("abcdefghijklmnopqrst", 0, 20, "", 20);
270 test("abcdefghijklmnopqrst", 0, 20, "abcde", 15);
271 test("abcdefghijklmnopqrst", 0, 20, "abcdefghij", 10);
272 test("abcdefghijklmnopqrst", 0, 20, "abcdefghijklmnopqrst", 0);
273 test("abcdefghijklmnopqrst", 0, 21, "", 20);
274 test("abcdefghijklmnopqrst", 0, 21, "abcde", 15);
275 test("abcdefghijklmnopqrst", 0, 21, "abcdefghij", 10);
276 test("abcdefghijklmnopqrst", 0, 21, "abcdefghijklmnopqrst", 0);
277 test("abcdefghijklmnopqrst", 1, 0, "", 0);
278 test("abcdefghijklmnopqrst", 1, 0, "abcde", -5);
279 test("abcdefghijklmnopqrst", 1, 0, "abcdefghij", -10);
280 test("abcdefghijklmnopqrst", 1, 0, "abcdefghijklmnopqrst", -20);
281 test("abcdefghijklmnopqrst", 1, 1, "", 1);
282 test("abcdefghijklmnopqrst", 1, 1, "abcde", 1);
283 test("abcdefghijklmnopqrst", 1, 1, "abcdefghij", 1);
284 test("abcdefghijklmnopqrst", 1, 1, "abcdefghijklmnopqrst", 1);
285 test("abcdefghijklmnopqrst", 1, 9, "", 9);
286 test("abcdefghijklmnopqrst", 1, 9, "abcde", 1);
287 test("abcdefghijklmnopqrst", 1, 9, "abcdefghij", 1);
288 test("abcdefghijklmnopqrst", 1, 9, "abcdefghijklmnopqrst", 1);
289 test("abcdefghijklmnopqrst", 1, 18, "", 18);
290 test("abcdefghijklmnopqrst", 1, 18, "abcde", 1);
291 test("abcdefghijklmnopqrst", 1, 18, "abcdefghij", 1);
292 test("abcdefghijklmnopqrst", 1, 18, "abcdefghijklmnopqrst", 1);
293 test("abcdefghijklmnopqrst", 1, 19, "", 19);
294 test("abcdefghijklmnopqrst", 1, 19, "abcde", 1);
295 test("abcdefghijklmnopqrst", 1, 19, "abcdefghij", 1);
296 test("abcdefghijklmnopqrst", 1, 19, "abcdefghijklmnopqrst", 1);
297 test("abcdefghijklmnopqrst", 1, 20, "", 19);
298 test("abcdefghijklmnopqrst", 1, 20, "abcde", 1);
299 test("abcdefghijklmnopqrst", 1, 20, "abcdefghij", 1);
300 test("abcdefghijklmnopqrst", 1, 20, "abcdefghijklmnopqrst", 1);
301 test("abcdefghijklmnopqrst", 10, 0, "", 0);
302 test("abcdefghijklmnopqrst", 10, 0, "abcde", -5);
303 test("abcdefghijklmnopqrst", 10, 0, "abcdefghij", -10);
304 test("abcdefghijklmnopqrst", 10, 0, "abcdefghijklmnopqrst", -20);
305 test("abcdefghijklmnopqrst", 10, 1, "", 1);
306 test("abcdefghijklmnopqrst", 10, 1, "abcde", 10);
307 test("abcdefghijklmnopqrst", 10, 1, "abcdefghij", 10);
308 test("abcdefghijklmnopqrst", 10, 1, "abcdefghijklmnopqrst", 10);
309 test("abcdefghijklmnopqrst", 10, 5, "", 5);
310 test("abcdefghijklmnopqrst", 10, 5, "abcde", 10);
311 test("abcdefghijklmnopqrst", 10, 5, "abcdefghij", 10);
312 test("abcdefghijklmnopqrst", 10, 5, "abcdefghijklmnopqrst", 10);
313 test("abcdefghijklmnopqrst", 10, 9, "", 9);
314 test("abcdefghijklmnopqrst", 10, 9, "abcde", 10);
315 test("abcdefghijklmnopqrst", 10, 9, "abcdefghij", 10);
316 test("abcdefghijklmnopqrst", 10, 9, "abcdefghijklmnopqrst", 10);
317 test("abcdefghijklmnopqrst", 10, 10, "", 10);
318 test("abcdefghijklmnopqrst", 10, 10, "abcde", 10);
319 test("abcdefghijklmnopqrst", 10, 10, "abcdefghij", 10);
320 test("abcdefghijklmnopqrst", 10, 10, "abcdefghijklmnopqrst", 10);
321 test("abcdefghijklmnopqrst", 10, 11, "", 10);
322 test("abcdefghijklmnopqrst", 10, 11, "abcde", 10);
323 test("abcdefghijklmnopqrst", 10, 11, "abcdefghij", 10);
324 test("abcdefghijklmnopqrst", 10, 11, "abcdefghijklmnopqrst", 10);
325 test("abcdefghijklmnopqrst", 19, 0, "", 0);
326 test("abcdefghijklmnopqrst", 19, 0, "abcde", -5);
327 test("abcdefghijklmnopqrst", 19, 0, "abcdefghij", -10);
328 test("abcdefghijklmnopqrst", 19, 0, "abcdefghijklmnopqrst", -20);
329 test("abcdefghijklmnopqrst", 19, 1, "", 1);
330 test("abcdefghijklmnopqrst", 19, 1, "abcde", 19);
331 test("abcdefghijklmnopqrst", 19, 1, "abcdefghij", 19);
332 test("abcdefghijklmnopqrst", 19, 1, "abcdefghijklmnopqrst", 19);
333 test("abcdefghijklmnopqrst", 19, 2, "", 1);
334 test("abcdefghijklmnopqrst", 19, 2, "abcde", 19);
335 test("abcdefghijklmnopqrst", 19, 2, "abcdefghij", 19);
336 test("abcdefghijklmnopqrst", 19, 2, "abcdefghijklmnopqrst", 19);
337 test("abcdefghijklmnopqrst", 20, 0, "", 0);
338 test("abcdefghijklmnopqrst", 20, 0, "abcde", -5);
339 test("abcdefghijklmnopqrst", 20, 0, "abcdefghij", -10);
340 test("abcdefghijklmnopqrst", 20, 0, "abcdefghijklmnopqrst", -20);
341 test("abcdefghijklmnopqrst", 20, 1, "", 0);
342 test("abcdefghijklmnopqrst", 20, 1, "abcde", -5);
343 test("abcdefghijklmnopqrst", 20, 1, "abcdefghij", -10);
344 test("abcdefghijklmnopqrst", 20, 1, "abcdefghijklmnopqrst", -20);
345 test("abcdefghijklmnopqrst", 21, 0, "", 0);
346 test("abcdefghijklmnopqrst", 21, 0, "abcde", 0);
347 test("abcdefghijklmnopqrst", 21, 0, "abcdefghij", 0);
348 test("abcdefghijklmnopqrst", 21, 0, "abcdefghijklmnopqrst", 0);
349 }
350
main(int,char **)351 int main(int, char**) {
352 test0();
353 test1();
354 test2();
355
356 {
357 test("", 0, 0, "", 0);
358 test("", 0, 0, "abcde", -5);
359 test("", 0, 0, "abcdefghij", -10);
360 test("", 0, 0, "abcdefghijklmnopqrst", -20);
361 test("abcde", 0, 2, "", 5);
362 test("abcde", 0, 6, "abcde", 0);
363 test("abcde", 0, 6, "abcdefghij", -5);
364 test("abcde", 0, 6, "abcdefghijklmnopqrst", -15);
365 test("abcdefghij", 3, 3, "", 10);
366 test("abcdefghij", 3, 3, "abcde", 5);
367 test("abcdefghij", 3, 3, "def", 0);
368 test("abcdefghij", 0, 4, "abcdefghijklmnopqrst", -10);
369 test("abcdefghijklmnopqrst", 5, 5, "", 20);
370 test("abcdefghijklmnopqrst", 0, 8, "abcde", 15);
371 test("abcdefghijklmnopqrst", 0, 12, "abcdefghij", 10);
372 test("abcdefghijklmnopqrst", 0, static_cast<std::size_t>(-1), "abcdefghijklmnopqrst", 0);
373 }
374
375 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
376 {
377 test(L"", 0, 0, L"", 0);
378 test(L"", 0, 0, L"abcde", -5);
379 test(L"", 0, 0, L"abcdefghij", -10);
380 test(L"", 0, 0, L"abcdefghijklmnopqrst", -20);
381 test(L"abcde", 0, 2, L"", 5);
382 test(L"abcde", 0, 6, L"abcde", 0);
383 test(L"abcde", 0, 6, L"abcdefghij", -5);
384 test(L"abcde", 0, 6, L"abcdefghijklmnopqrst", -15);
385 test(L"abcdefghij", 3, 3, L"", 10);
386 test(L"abcdefghij", 3, 3, L"abcde", 5);
387 test(L"abcdefghij", 3, 3, L"def", 0);
388 test(L"abcdefghij", 0, 4, L"abcdefghijklmnopqrst", -10);
389 test(L"abcdefghijklmnopqrst", 5, 5, L"", 20);
390 test(L"abcdefghijklmnopqrst", 0, 8, L"abcde", 15);
391 test(L"abcdefghijklmnopqrst", 0, 12, L"abcdefghij", 10);
392 test(L"abcdefghijklmnopqrst", 0, static_cast<std::size_t>(-1), L"abcdefghijklmnopqrst", 0);
393 }
394 #endif
395
396 #if TEST_STD_VER >= 11
397 {
398 test(U"", 0, 0, U"", 0);
399 test(U"", 0, 0, U"abcde", -5);
400 test(U"", 0, 0, U"abcdefghij", -10);
401 test(U"", 0, 0, U"abcdefghijklmnopqrst", -20);
402 test(U"abcde", 0, 2, U"", 5);
403 test(U"abcde", 0, 6, U"abcde", 0);
404 test(U"abcde", 0, 6, U"abcdefghij", -5);
405 test(U"abcde", 0, 6, U"abcdefghijklmnopqrst", -15);
406 test(U"abcdefghij", 3, 3, U"", 10);
407 test(U"abcdefghij", 3, 3, U"abcde", 5);
408 test(U"abcdefghij", 3, 3, U"def", 0);
409 test(U"abcdefghij", 0, 4, U"abcdefghijklmnopqrst", -10);
410 test(U"abcdefghijklmnopqrst", 5, 5, U"", 20);
411 test(U"abcdefghijklmnopqrst", 0, 8, U"abcde", 15);
412 test(U"abcdefghijklmnopqrst", 0, 12, U"abcdefghij", 10);
413 test(U"abcdefghijklmnopqrst", 0, static_cast<std::size_t>(-1), U"abcdefghijklmnopqrst", 0);
414 }
415
416 {
417 test(u"", 0, 0, u"", 0);
418 test(u"", 0, 0, u"abcde", -5);
419 test(u"", 0, 0, u"abcdefghij", -10);
420 test(u"", 0, 0, u"abcdefghijklmnopqrst", -20);
421 test(u"abcde", 0, 2, u"", 5);
422 test(u"abcde", 0, 6, u"abcde", 0);
423 test(u"abcde", 0, 6, u"abcdefghij", -5);
424 test(u"abcde", 0, 6, u"abcdefghijklmnopqrst", -15);
425 test(u"abcdefghij", 3, 3, u"", 10);
426 test(u"abcdefghij", 3, 3, u"abcde", 5);
427 test(u"abcdefghij", 3, 3, u"def", 0);
428 test(u"abcdefghij", 0, 4, u"abcdefghijklmnopqrst", -10);
429 test(u"abcdefghijklmnopqrst", 5, 5, u"", 20);
430 test(u"abcdefghijklmnopqrst", 0, 8, u"abcde", 15);
431 test(u"abcdefghijklmnopqrst", 0, 12, u"abcdefghij", 10);
432 test(u"abcdefghijklmnopqrst", 0, static_cast<std::size_t>(-1), u"abcdefghijklmnopqrst", 0);
433 }
434 #endif
435
436 #if TEST_STD_VER > 11
437 {
438 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
439 constexpr SV sv1;
440 constexpr SV sv2{"abcde", 5};
441 static_assert(sv1.compare(0, 0, "") == 0, "");
442 static_assert(sv1.compare(0, 0, "abcde") < 0, "");
443 static_assert(sv2.compare(0, 2, "") > 0, "");
444 static_assert(sv2.compare(0, 6, "abcde") == 0, "");
445 }
446 #endif
447
448 return 0;
449 }
450