1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <string_view>
11 // constexpr size_type rfind(const charT* s, size_type pos, size_type n) const;
12 
13 #include <experimental/string_view>
14 #include <cassert>
15 
16 #include "constexpr_char_traits.hpp"
17 
18 template <class S>
19 void
test(const S & s,const typename S::value_type * str,typename S::size_type pos,typename S::size_type n,typename S::size_type x)20 test(const S& s, const typename S::value_type* str, typename S::size_type pos,
21       typename S::size_type n, typename S::size_type x)
22 {
23     assert(s.rfind(str, pos, n) == x);
24     if (x != S::npos)
25         assert(x <= pos && x + n <= s.size());
26 }
27 
28 template <class S>
test0()29 void test0()
30 {
31     test(S(""), "", 0, 0, 0);
32     test(S(""), "abcde", 0, 0, 0);
33     test(S(""), "abcde", 0, 1, S::npos);
34     test(S(""), "abcde", 0, 2, S::npos);
35     test(S(""), "abcde", 0, 4, S::npos);
36     test(S(""), "abcde", 0, 5, S::npos);
37     test(S(""), "abcdeabcde", 0, 0, 0);
38     test(S(""), "abcdeabcde", 0, 1, S::npos);
39     test(S(""), "abcdeabcde", 0, 5, S::npos);
40     test(S(""), "abcdeabcde", 0, 9, S::npos);
41     test(S(""), "abcdeabcde", 0, 10, S::npos);
42     test(S(""), "abcdeabcdeabcdeabcde", 0, 0, 0);
43     test(S(""), "abcdeabcdeabcdeabcde", 0, 1, S::npos);
44     test(S(""), "abcdeabcdeabcdeabcde", 0, 10, S::npos);
45     test(S(""), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
46     test(S(""), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
47     test(S(""), "", 1, 0, 0);
48     test(S(""), "abcde", 1, 0, 0);
49     test(S(""), "abcde", 1, 1, S::npos);
50     test(S(""), "abcde", 1, 2, S::npos);
51     test(S(""), "abcde", 1, 4, S::npos);
52     test(S(""), "abcde", 1, 5, S::npos);
53     test(S(""), "abcdeabcde", 1, 0, 0);
54     test(S(""), "abcdeabcde", 1, 1, S::npos);
55     test(S(""), "abcdeabcde", 1, 5, S::npos);
56     test(S(""), "abcdeabcde", 1, 9, S::npos);
57     test(S(""), "abcdeabcde", 1, 10, S::npos);
58     test(S(""), "abcdeabcdeabcdeabcde", 1, 0, 0);
59     test(S(""), "abcdeabcdeabcdeabcde", 1, 1, S::npos);
60     test(S(""), "abcdeabcdeabcdeabcde", 1, 10, S::npos);
61     test(S(""), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
62     test(S(""), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
63     test(S("abcde"), "", 0, 0, 0);
64     test(S("abcde"), "abcde", 0, 0, 0);
65     test(S("abcde"), "abcde", 0, 1, 0);
66     test(S("abcde"), "abcde", 0, 2, 0);
67     test(S("abcde"), "abcde", 0, 4, 0);
68     test(S("abcde"), "abcde", 0, 5, 0);
69     test(S("abcde"), "abcdeabcde", 0, 0, 0);
70     test(S("abcde"), "abcdeabcde", 0, 1, 0);
71     test(S("abcde"), "abcdeabcde", 0, 5, 0);
72     test(S("abcde"), "abcdeabcde", 0, 9, S::npos);
73     test(S("abcde"), "abcdeabcde", 0, 10, S::npos);
74     test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
75     test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
76     test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 10, S::npos);
77     test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
78     test(S("abcde"), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
79     test(S("abcde"), "", 1, 0, 1);
80     test(S("abcde"), "abcde", 1, 0, 1);
81     test(S("abcde"), "abcde", 1, 1, 0);
82     test(S("abcde"), "abcde", 1, 2, 0);
83     test(S("abcde"), "abcde", 1, 4, 0);
84     test(S("abcde"), "abcde", 1, 5, 0);
85     test(S("abcde"), "abcdeabcde", 1, 0, 1);
86     test(S("abcde"), "abcdeabcde", 1, 1, 0);
87     test(S("abcde"), "abcdeabcde", 1, 5, 0);
88     test(S("abcde"), "abcdeabcde", 1, 9, S::npos);
89     test(S("abcde"), "abcdeabcde", 1, 10, S::npos);
90     test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
91     test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 1, 0);
92     test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 10, S::npos);
93     test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
94     test(S("abcde"), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
95     test(S("abcde"), "", 2, 0, 2);
96     test(S("abcde"), "abcde", 2, 0, 2);
97     test(S("abcde"), "abcde", 2, 1, 0);
98     test(S("abcde"), "abcde", 2, 2, 0);
99     test(S("abcde"), "abcde", 2, 4, 0);
100     test(S("abcde"), "abcde", 2, 5, 0);
101     test(S("abcde"), "abcdeabcde", 2, 0, 2);
102     test(S("abcde"), "abcdeabcde", 2, 1, 0);
103     test(S("abcde"), "abcdeabcde", 2, 5, 0);
104     test(S("abcde"), "abcdeabcde", 2, 9, S::npos);
105     test(S("abcde"), "abcdeabcde", 2, 10, S::npos);
106     test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 0, 2);
107     test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 1, 0);
108     test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 10, S::npos);
109     test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 19, S::npos);
110     test(S("abcde"), "abcdeabcdeabcdeabcde", 2, 20, S::npos);
111     test(S("abcde"), "", 4, 0, 4);
112     test(S("abcde"), "abcde", 4, 0, 4);
113     test(S("abcde"), "abcde", 4, 1, 0);
114     test(S("abcde"), "abcde", 4, 2, 0);
115     test(S("abcde"), "abcde", 4, 4, 0);
116     test(S("abcde"), "abcde", 4, 5, 0);
117     test(S("abcde"), "abcdeabcde", 4, 0, 4);
118     test(S("abcde"), "abcdeabcde", 4, 1, 0);
119     test(S("abcde"), "abcdeabcde", 4, 5, 0);
120     test(S("abcde"), "abcdeabcde", 4, 9, S::npos);
121     test(S("abcde"), "abcdeabcde", 4, 10, S::npos);
122     test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 0, 4);
123     test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 1, 0);
124     test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 10, S::npos);
125     test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 19, S::npos);
126     test(S("abcde"), "abcdeabcdeabcdeabcde", 4, 20, S::npos);
127     test(S("abcde"), "", 5, 0, 5);
128     test(S("abcde"), "abcde", 5, 0, 5);
129     test(S("abcde"), "abcde", 5, 1, 0);
130     test(S("abcde"), "abcde", 5, 2, 0);
131 }
132 
133 template <class S>
test1()134 void test1()
135 {
136     test(S("abcde"), "abcde", 5, 4, 0);
137     test(S("abcde"), "abcde", 5, 5, 0);
138     test(S("abcde"), "abcdeabcde", 5, 0, 5);
139     test(S("abcde"), "abcdeabcde", 5, 1, 0);
140     test(S("abcde"), "abcdeabcde", 5, 5, 0);
141     test(S("abcde"), "abcdeabcde", 5, 9, S::npos);
142     test(S("abcde"), "abcdeabcde", 5, 10, S::npos);
143     test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 0, 5);
144     test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 1, 0);
145     test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 10, S::npos);
146     test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 19, S::npos);
147     test(S("abcde"), "abcdeabcdeabcdeabcde", 5, 20, S::npos);
148     test(S("abcde"), "", 6, 0, 5);
149     test(S("abcde"), "abcde", 6, 0, 5);
150     test(S("abcde"), "abcde", 6, 1, 0);
151     test(S("abcde"), "abcde", 6, 2, 0);
152     test(S("abcde"), "abcde", 6, 4, 0);
153     test(S("abcde"), "abcde", 6, 5, 0);
154     test(S("abcde"), "abcdeabcde", 6, 0, 5);
155     test(S("abcde"), "abcdeabcde", 6, 1, 0);
156     test(S("abcde"), "abcdeabcde", 6, 5, 0);
157     test(S("abcde"), "abcdeabcde", 6, 9, S::npos);
158     test(S("abcde"), "abcdeabcde", 6, 10, S::npos);
159     test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 0, 5);
160     test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 1, 0);
161     test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 10, S::npos);
162     test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 19, S::npos);
163     test(S("abcde"), "abcdeabcdeabcdeabcde", 6, 20, S::npos);
164     test(S("abcdeabcde"), "", 0, 0, 0);
165     test(S("abcdeabcde"), "abcde", 0, 0, 0);
166     test(S("abcdeabcde"), "abcde", 0, 1, 0);
167     test(S("abcdeabcde"), "abcde", 0, 2, 0);
168     test(S("abcdeabcde"), "abcde", 0, 4, 0);
169     test(S("abcdeabcde"), "abcde", 0, 5, 0);
170     test(S("abcdeabcde"), "abcdeabcde", 0, 0, 0);
171     test(S("abcdeabcde"), "abcdeabcde", 0, 1, 0);
172     test(S("abcdeabcde"), "abcdeabcde", 0, 5, 0);
173     test(S("abcdeabcde"), "abcdeabcde", 0, 9, 0);
174     test(S("abcdeabcde"), "abcdeabcde", 0, 10, 0);
175     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
176     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
177     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 10, 0);
178     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 19, S::npos);
179     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, 20, S::npos);
180     test(S("abcdeabcde"), "", 1, 0, 1);
181     test(S("abcdeabcde"), "abcde", 1, 0, 1);
182     test(S("abcdeabcde"), "abcde", 1, 1, 0);
183     test(S("abcdeabcde"), "abcde", 1, 2, 0);
184     test(S("abcdeabcde"), "abcde", 1, 4, 0);
185     test(S("abcdeabcde"), "abcde", 1, 5, 0);
186     test(S("abcdeabcde"), "abcdeabcde", 1, 0, 1);
187     test(S("abcdeabcde"), "abcdeabcde", 1, 1, 0);
188     test(S("abcdeabcde"), "abcdeabcde", 1, 5, 0);
189     test(S("abcdeabcde"), "abcdeabcde", 1, 9, 0);
190     test(S("abcdeabcde"), "abcdeabcde", 1, 10, 0);
191     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
192     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 1, 0);
193     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 10, 0);
194     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 19, S::npos);
195     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, 20, S::npos);
196     test(S("abcdeabcde"), "", 5, 0, 5);
197     test(S("abcdeabcde"), "abcde", 5, 0, 5);
198     test(S("abcdeabcde"), "abcde", 5, 1, 5);
199     test(S("abcdeabcde"), "abcde", 5, 2, 5);
200     test(S("abcdeabcde"), "abcde", 5, 4, 5);
201     test(S("abcdeabcde"), "abcde", 5, 5, 5);
202     test(S("abcdeabcde"), "abcdeabcde", 5, 0, 5);
203     test(S("abcdeabcde"), "abcdeabcde", 5, 1, 5);
204     test(S("abcdeabcde"), "abcdeabcde", 5, 5, 5);
205     test(S("abcdeabcde"), "abcdeabcde", 5, 9, 0);
206     test(S("abcdeabcde"), "abcdeabcde", 5, 10, 0);
207     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 0, 5);
208     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 1, 5);
209     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 10, 0);
210     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 19, S::npos);
211     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, 20, S::npos);
212     test(S("abcdeabcde"), "", 9, 0, 9);
213     test(S("abcdeabcde"), "abcde", 9, 0, 9);
214     test(S("abcdeabcde"), "abcde", 9, 1, 5);
215     test(S("abcdeabcde"), "abcde", 9, 2, 5);
216     test(S("abcdeabcde"), "abcde", 9, 4, 5);
217     test(S("abcdeabcde"), "abcde", 9, 5, 5);
218     test(S("abcdeabcde"), "abcdeabcde", 9, 0, 9);
219     test(S("abcdeabcde"), "abcdeabcde", 9, 1, 5);
220     test(S("abcdeabcde"), "abcdeabcde", 9, 5, 5);
221     test(S("abcdeabcde"), "abcdeabcde", 9, 9, 0);
222     test(S("abcdeabcde"), "abcdeabcde", 9, 10, 0);
223     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 0, 9);
224     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 1, 5);
225     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 10, 0);
226     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 19, S::npos);
227     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, 20, S::npos);
228     test(S("abcdeabcde"), "", 10, 0, 10);
229     test(S("abcdeabcde"), "abcde", 10, 0, 10);
230     test(S("abcdeabcde"), "abcde", 10, 1, 5);
231     test(S("abcdeabcde"), "abcde", 10, 2, 5);
232     test(S("abcdeabcde"), "abcde", 10, 4, 5);
233     test(S("abcdeabcde"), "abcde", 10, 5, 5);
234     test(S("abcdeabcde"), "abcdeabcde", 10, 0, 10);
235     test(S("abcdeabcde"), "abcdeabcde", 10, 1, 5);
236 }
237 
238 template <class S>
test2()239 void test2()
240 {
241     test(S("abcdeabcde"), "abcdeabcde", 10, 5, 5);
242     test(S("abcdeabcde"), "abcdeabcde", 10, 9, 0);
243     test(S("abcdeabcde"), "abcdeabcde", 10, 10, 0);
244     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0, 10);
245     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 1, 5);
246     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 10, 0);
247     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 19, S::npos);
248     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, 20, S::npos);
249     test(S("abcdeabcde"), "", 11, 0, 10);
250     test(S("abcdeabcde"), "abcde", 11, 0, 10);
251     test(S("abcdeabcde"), "abcde", 11, 1, 5);
252     test(S("abcdeabcde"), "abcde", 11, 2, 5);
253     test(S("abcdeabcde"), "abcde", 11, 4, 5);
254     test(S("abcdeabcde"), "abcde", 11, 5, 5);
255     test(S("abcdeabcde"), "abcdeabcde", 11, 0, 10);
256     test(S("abcdeabcde"), "abcdeabcde", 11, 1, 5);
257     test(S("abcdeabcde"), "abcdeabcde", 11, 5, 5);
258     test(S("abcdeabcde"), "abcdeabcde", 11, 9, 0);
259     test(S("abcdeabcde"), "abcdeabcde", 11, 10, 0);
260     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 0, 10);
261     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 1, 5);
262     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 10, 0);
263     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 19, S::npos);
264     test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, 20, S::npos);
265     test(S("abcdeabcdeabcdeabcde"), "", 0, 0, 0);
266     test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 0, 0);
267     test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 1, 0);
268     test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 2, 0);
269     test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 4, 0);
270     test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 5, 0);
271     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 0, 0);
272     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 1, 0);
273     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 5, 0);
274     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 9, 0);
275     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 10, 0);
276     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0, 0);
277     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 1, 0);
278     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 10, 0);
279     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 19, 0);
280     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 20, 0);
281     test(S("abcdeabcdeabcdeabcde"), "", 1, 0, 1);
282     test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 0, 1);
283     test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 1, 0);
284     test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 2, 0);
285     test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 4, 0);
286     test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 5, 0);
287     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 0, 1);
288     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 1, 0);
289     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 5, 0);
290     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 9, 0);
291     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 10, 0);
292     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0, 1);
293     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 1, 0);
294     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 10, 0);
295     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 19, 0);
296     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 20, 0);
297     test(S("abcdeabcdeabcdeabcde"), "", 10, 0, 10);
298     test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 0, 10);
299     test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 1, 10);
300     test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 2, 10);
301     test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 4, 10);
302     test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 5, 10);
303     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 0, 10);
304     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 1, 10);
305     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 5, 10);
306     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 9, 10);
307     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 10, 10);
308     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0, 10);
309     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 1, 10);
310     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 10, 10);
311     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 19, 0);
312     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 20, 0);
313     test(S("abcdeabcdeabcdeabcde"), "", 19, 0, 19);
314     test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 0, 19);
315     test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 1, 15);
316     test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 2, 15);
317     test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 4, 15);
318     test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 5, 15);
319     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 0, 19);
320     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 1, 15);
321     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 5, 15);
322     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 9, 10);
323     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 10, 10);
324     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 0, 19);
325     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 1, 15);
326     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 10, 10);
327     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 19, 0);
328     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 20, 0);
329     test(S("abcdeabcdeabcdeabcde"), "", 20, 0, 20);
330     test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 0, 20);
331     test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 1, 15);
332     test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 2, 15);
333     test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 4, 15);
334     test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 5, 15);
335     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 0, 20);
336     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 1, 15);
337     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 5, 15);
338     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 9, 10);
339     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 10, 10);
340     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 0, 20);
341 }
342 
343 template <class S>
test3()344 void test3()
345 {
346     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 1, 15);
347     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 10, 10);
348     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 19, 0);
349     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 20, 0);
350     test(S("abcdeabcdeabcdeabcde"), "", 21, 0, 20);
351     test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 0, 20);
352     test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 1, 15);
353     test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 2, 15);
354     test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 4, 15);
355     test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 5, 15);
356     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 0, 20);
357     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 1, 15);
358     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 5, 15);
359     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 9, 10);
360     test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 10, 10);
361     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 0, 20);
362     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 1, 15);
363     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 10, 10);
364     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 19, 0);
365     test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 20, 0);
366 }
367 
main()368 int main()
369 {
370     {
371     typedef std::experimental::string_view S;
372     test0<S>();
373     test1<S>();
374     test2<S>();
375     test3<S>();
376     }
377 
378 #if _LIBCPP_STD_VER > 11
379     {
380     typedef std::experimental::basic_string_view<char, constexpr_char_traits<char>> SV;
381     constexpr SV  sv1;
382     constexpr SV  sv2 { "abcde", 5 };
383 
384     static_assert (sv1.rfind( "",      0, 0 ) == 0, "" );
385     static_assert (sv1.rfind( "abcde", 0, 0 ) == 0, "" );
386     static_assert (sv1.rfind( "abcde", 0, 1 ) == SV::npos, "" );
387     static_assert (sv2.rfind( "",      0, 0 ) == 0, "" );
388     static_assert (sv2.rfind( "abcde", 0, 0 ) == 0, "" );
389     static_assert (sv2.rfind( "abcde", 0, 1 ) == 0, "" );
390     }
391 #endif
392 }
393