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 // basic_string<charT,traits,Allocator>&
12 //   replace(const_iterator i1, const_iterator i2, basic_string_view<charT,traits> sv); // constexpr since C++20
13 
14 #include <string>
15 #include <algorithm>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 #include "min_allocator.h"
20 
21 template <class S, class SV>
22 TEST_CONSTEXPR_CXX20 void
test(S s,typename S::size_type pos1,typename S::size_type n1,SV sv,S expected)23 test(S s, typename S::size_type pos1, typename S::size_type n1, SV sv, S expected)
24 {
25     typename S::size_type old_size = s.size();
26     typename S::const_iterator first = s.begin() + pos1;
27     typename S::const_iterator last = s.begin() + pos1 + n1;
28     typename S::size_type xlen = last - first;
29     s.replace(first, last, sv);
30     LIBCPP_ASSERT(s.__invariants());
31     assert(s == expected);
32     typename S::size_type rlen = sv.size();
33     assert(s.size() == old_size - xlen + rlen);
34 }
35 
36 template <class S, class SV>
test0()37 TEST_CONSTEXPR_CXX20 bool test0()
38 {
39     test(S(""), 0, 0, SV(""), S(""));
40     test(S(""), 0, 0, SV("12345"), S("12345"));
41     test(S(""), 0, 0, SV("1234567890"), S("1234567890"));
42     test(S(""), 0, 0, SV("12345678901234567890"), S("12345678901234567890"));
43     test(S("abcde"), 0, 0, SV(""), S("abcde"));
44     test(S("abcde"), 0, 0, SV("12345"), S("12345abcde"));
45     test(S("abcde"), 0, 0, SV("1234567890"), S("1234567890abcde"));
46     test(S("abcde"), 0, 0, SV("12345678901234567890"), S("12345678901234567890abcde"));
47     test(S("abcde"), 0, 1, SV(""), S("bcde"));
48     test(S("abcde"), 0, 1, SV("12345"), S("12345bcde"));
49     test(S("abcde"), 0, 1, SV("1234567890"), S("1234567890bcde"));
50     test(S("abcde"), 0, 1, SV("12345678901234567890"), S("12345678901234567890bcde"));
51     test(S("abcde"), 0, 2, SV(""), S("cde"));
52     test(S("abcde"), 0, 2, SV("12345"), S("12345cde"));
53     test(S("abcde"), 0, 2, SV("1234567890"), S("1234567890cde"));
54     test(S("abcde"), 0, 2, SV("12345678901234567890"), S("12345678901234567890cde"));
55     test(S("abcde"), 0, 4, SV(""), S("e"));
56     test(S("abcde"), 0, 4, SV("12345"), S("12345e"));
57     test(S("abcde"), 0, 4, SV("1234567890"), S("1234567890e"));
58     test(S("abcde"), 0, 4, SV("12345678901234567890"), S("12345678901234567890e"));
59     test(S("abcde"), 0, 5, SV(""), S(""));
60     test(S("abcde"), 0, 5, SV("12345"), S("12345"));
61     test(S("abcde"), 0, 5, SV("1234567890"), S("1234567890"));
62     test(S("abcde"), 0, 5, SV("12345678901234567890"), S("12345678901234567890"));
63     test(S("abcde"), 1, 0, SV(""), S("abcde"));
64     test(S("abcde"), 1, 0, SV("12345"), S("a12345bcde"));
65     test(S("abcde"), 1, 0, SV("1234567890"), S("a1234567890bcde"));
66     test(S("abcde"), 1, 0, SV("12345678901234567890"), S("a12345678901234567890bcde"));
67     test(S("abcde"), 1, 1, SV(""), S("acde"));
68     test(S("abcde"), 1, 1, SV("12345"), S("a12345cde"));
69     test(S("abcde"), 1, 1, SV("1234567890"), S("a1234567890cde"));
70     test(S("abcde"), 1, 1, SV("12345678901234567890"), S("a12345678901234567890cde"));
71     test(S("abcde"), 1, 2, SV(""), S("ade"));
72     test(S("abcde"), 1, 2, SV("12345"), S("a12345de"));
73     test(S("abcde"), 1, 2, SV("1234567890"), S("a1234567890de"));
74     test(S("abcde"), 1, 2, SV("12345678901234567890"), S("a12345678901234567890de"));
75     test(S("abcde"), 1, 3, SV(""), S("ae"));
76     test(S("abcde"), 1, 3, SV("12345"), S("a12345e"));
77     test(S("abcde"), 1, 3, SV("1234567890"), S("a1234567890e"));
78     test(S("abcde"), 1, 3, SV("12345678901234567890"), S("a12345678901234567890e"));
79     test(S("abcde"), 1, 4, SV(""), S("a"));
80     test(S("abcde"), 1, 4, SV("12345"), S("a12345"));
81     test(S("abcde"), 1, 4, SV("1234567890"), S("a1234567890"));
82     test(S("abcde"), 1, 4, SV("12345678901234567890"), S("a12345678901234567890"));
83     test(S("abcde"), 2, 0, SV(""), S("abcde"));
84     test(S("abcde"), 2, 0, SV("12345"), S("ab12345cde"));
85     test(S("abcde"), 2, 0, SV("1234567890"), S("ab1234567890cde"));
86     test(S("abcde"), 2, 0, SV("12345678901234567890"), S("ab12345678901234567890cde"));
87     test(S("abcde"), 2, 1, SV(""), S("abde"));
88     test(S("abcde"), 2, 1, SV("12345"), S("ab12345de"));
89     test(S("abcde"), 2, 1, SV("1234567890"), S("ab1234567890de"));
90     test(S("abcde"), 2, 1, SV("12345678901234567890"), S("ab12345678901234567890de"));
91     test(S("abcde"), 2, 2, SV(""), S("abe"));
92     test(S("abcde"), 2, 2, SV("12345"), S("ab12345e"));
93     test(S("abcde"), 2, 2, SV("1234567890"), S("ab1234567890e"));
94     test(S("abcde"), 2, 2, SV("12345678901234567890"), S("ab12345678901234567890e"));
95     test(S("abcde"), 2, 3, SV(""), S("ab"));
96     test(S("abcde"), 2, 3, SV("12345"), S("ab12345"));
97     test(S("abcde"), 2, 3, SV("1234567890"), S("ab1234567890"));
98     test(S("abcde"), 2, 3, SV("12345678901234567890"), S("ab12345678901234567890"));
99     test(S("abcde"), 4, 0, SV(""), S("abcde"));
100     test(S("abcde"), 4, 0, SV("12345"), S("abcd12345e"));
101     test(S("abcde"), 4, 0, SV("1234567890"), S("abcd1234567890e"));
102     test(S("abcde"), 4, 0, SV("12345678901234567890"), S("abcd12345678901234567890e"));
103     test(S("abcde"), 4, 1, SV(""), S("abcd"));
104     test(S("abcde"), 4, 1, SV("12345"), S("abcd12345"));
105     test(S("abcde"), 4, 1, SV("1234567890"), S("abcd1234567890"));
106     test(S("abcde"), 4, 1, SV("12345678901234567890"), S("abcd12345678901234567890"));
107     test(S("abcde"), 5, 0, SV(""), S("abcde"));
108     test(S("abcde"), 5, 0, SV("12345"), S("abcde12345"));
109     test(S("abcde"), 5, 0, SV("1234567890"), S("abcde1234567890"));
110     test(S("abcde"), 5, 0, SV("12345678901234567890"), S("abcde12345678901234567890"));
111     test(S("abcdefghij"), 0, 0, SV(""), S("abcdefghij"));
112     test(S("abcdefghij"), 0, 0, SV("12345"), S("12345abcdefghij"));
113     test(S("abcdefghij"), 0, 0, SV("1234567890"), S("1234567890abcdefghij"));
114     test(S("abcdefghij"), 0, 0, SV("12345678901234567890"), S("12345678901234567890abcdefghij"));
115     test(S("abcdefghij"), 0, 1, SV(""), S("bcdefghij"));
116     test(S("abcdefghij"), 0, 1, SV("12345"), S("12345bcdefghij"));
117     test(S("abcdefghij"), 0, 1, SV("1234567890"), S("1234567890bcdefghij"));
118     test(S("abcdefghij"), 0, 1, SV("12345678901234567890"), S("12345678901234567890bcdefghij"));
119     test(S("abcdefghij"), 0, 5, SV(""), S("fghij"));
120     test(S("abcdefghij"), 0, 5, SV("12345"), S("12345fghij"));
121     test(S("abcdefghij"), 0, 5, SV("1234567890"), S("1234567890fghij"));
122     test(S("abcdefghij"), 0, 5, SV("12345678901234567890"), S("12345678901234567890fghij"));
123     test(S("abcdefghij"), 0, 9, SV(""), S("j"));
124     test(S("abcdefghij"), 0, 9, SV("12345"), S("12345j"));
125     test(S("abcdefghij"), 0, 9, SV("1234567890"), S("1234567890j"));
126     test(S("abcdefghij"), 0, 9, SV("12345678901234567890"), S("12345678901234567890j"));
127     test(S("abcdefghij"), 0, 10, SV(""), S(""));
128     test(S("abcdefghij"), 0, 10, SV("12345"), S("12345"));
129     test(S("abcdefghij"), 0, 10, SV("1234567890"), S("1234567890"));
130     test(S("abcdefghij"), 0, 10, SV("12345678901234567890"), S("12345678901234567890"));
131     test(S("abcdefghij"), 1, 0, SV(""), S("abcdefghij"));
132     test(S("abcdefghij"), 1, 0, SV("12345"), S("a12345bcdefghij"));
133     test(S("abcdefghij"), 1, 0, SV("1234567890"), S("a1234567890bcdefghij"));
134     test(S("abcdefghij"), 1, 0, SV("12345678901234567890"), S("a12345678901234567890bcdefghij"));
135     test(S("abcdefghij"), 1, 1, SV(""), S("acdefghij"));
136     test(S("abcdefghij"), 1, 1, SV("12345"), S("a12345cdefghij"));
137     test(S("abcdefghij"), 1, 1, SV("1234567890"), S("a1234567890cdefghij"));
138     test(S("abcdefghij"), 1, 1, SV("12345678901234567890"), S("a12345678901234567890cdefghij"));
139 
140     return true;
141 }
142 
143 template <class S, class SV>
test1()144 TEST_CONSTEXPR_CXX20 bool test1()
145 {
146     test(S("abcdefghij"), 1, 4, SV(""), S("afghij"));
147     test(S("abcdefghij"), 1, 4, SV("12345"), S("a12345fghij"));
148     test(S("abcdefghij"), 1, 4, SV("1234567890"), S("a1234567890fghij"));
149     test(S("abcdefghij"), 1, 4, SV("12345678901234567890"), S("a12345678901234567890fghij"));
150     test(S("abcdefghij"), 1, 8, SV(""), S("aj"));
151     test(S("abcdefghij"), 1, 8, SV("12345"), S("a12345j"));
152     test(S("abcdefghij"), 1, 8, SV("1234567890"), S("a1234567890j"));
153     test(S("abcdefghij"), 1, 8, SV("12345678901234567890"), S("a12345678901234567890j"));
154     test(S("abcdefghij"), 1, 9, SV(""), S("a"));
155     test(S("abcdefghij"), 1, 9, SV("12345"), S("a12345"));
156     test(S("abcdefghij"), 1, 9, SV("1234567890"), S("a1234567890"));
157     test(S("abcdefghij"), 1, 9, SV("12345678901234567890"), S("a12345678901234567890"));
158     test(S("abcdefghij"), 5, 0, SV(""), S("abcdefghij"));
159     test(S("abcdefghij"), 5, 0, SV("12345"), S("abcde12345fghij"));
160     test(S("abcdefghij"), 5, 0, SV("1234567890"), S("abcde1234567890fghij"));
161     test(S("abcdefghij"), 5, 0, SV("12345678901234567890"), S("abcde12345678901234567890fghij"));
162     test(S("abcdefghij"), 5, 1, SV(""), S("abcdeghij"));
163     test(S("abcdefghij"), 5, 1, SV("12345"), S("abcde12345ghij"));
164     test(S("abcdefghij"), 5, 1, SV("1234567890"), S("abcde1234567890ghij"));
165     test(S("abcdefghij"), 5, 1, SV("12345678901234567890"), S("abcde12345678901234567890ghij"));
166     test(S("abcdefghij"), 5, 2, SV(""), S("abcdehij"));
167     test(S("abcdefghij"), 5, 2, SV("12345"), S("abcde12345hij"));
168     test(S("abcdefghij"), 5, 2, SV("1234567890"), S("abcde1234567890hij"));
169     test(S("abcdefghij"), 5, 2, SV("12345678901234567890"), S("abcde12345678901234567890hij"));
170     test(S("abcdefghij"), 5, 4, SV(""), S("abcdej"));
171     test(S("abcdefghij"), 5, 4, SV("12345"), S("abcde12345j"));
172     test(S("abcdefghij"), 5, 4, SV("1234567890"), S("abcde1234567890j"));
173     test(S("abcdefghij"), 5, 4, SV("12345678901234567890"), S("abcde12345678901234567890j"));
174     test(S("abcdefghij"), 5, 5, SV(""), S("abcde"));
175     test(S("abcdefghij"), 5, 5, SV("12345"), S("abcde12345"));
176     test(S("abcdefghij"), 5, 5, SV("1234567890"), S("abcde1234567890"));
177     test(S("abcdefghij"), 5, 5, SV("12345678901234567890"), S("abcde12345678901234567890"));
178     test(S("abcdefghij"), 9, 0, SV(""), S("abcdefghij"));
179     test(S("abcdefghij"), 9, 0, SV("12345"), S("abcdefghi12345j"));
180     test(S("abcdefghij"), 9, 0, SV("1234567890"), S("abcdefghi1234567890j"));
181     test(S("abcdefghij"), 9, 0, SV("12345678901234567890"), S("abcdefghi12345678901234567890j"));
182     test(S("abcdefghij"), 9, 1, SV(""), S("abcdefghi"));
183     test(S("abcdefghij"), 9, 1, SV("12345"), S("abcdefghi12345"));
184     test(S("abcdefghij"), 9, 1, SV("1234567890"), S("abcdefghi1234567890"));
185     test(S("abcdefghij"), 9, 1, SV("12345678901234567890"), S("abcdefghi12345678901234567890"));
186     test(S("abcdefghij"), 10, 0, SV(""), S("abcdefghij"));
187     test(S("abcdefghij"), 10, 0, SV("12345"), S("abcdefghij12345"));
188     test(S("abcdefghij"), 10, 0, SV("1234567890"), S("abcdefghij1234567890"));
189     test(S("abcdefghij"), 10, 0, SV("12345678901234567890"), S("abcdefghij12345678901234567890"));
190     test(S("abcdefghijklmnopqrst"), 0, 0, SV(""), S("abcdefghijklmnopqrst"));
191     test(S("abcdefghijklmnopqrst"), 0, 0, SV("12345"), S("12345abcdefghijklmnopqrst"));
192     test(S("abcdefghijklmnopqrst"), 0, 0, SV("1234567890"), S("1234567890abcdefghijklmnopqrst"));
193     test(S("abcdefghijklmnopqrst"), 0, 0, SV("12345678901234567890"), S("12345678901234567890abcdefghijklmnopqrst"));
194     test(S("abcdefghijklmnopqrst"), 0, 1, SV(""), S("bcdefghijklmnopqrst"));
195     test(S("abcdefghijklmnopqrst"), 0, 1, SV("12345"), S("12345bcdefghijklmnopqrst"));
196     test(S("abcdefghijklmnopqrst"), 0, 1, SV("1234567890"), S("1234567890bcdefghijklmnopqrst"));
197     test(S("abcdefghijklmnopqrst"), 0, 1, SV("12345678901234567890"), S("12345678901234567890bcdefghijklmnopqrst"));
198     test(S("abcdefghijklmnopqrst"), 0, 10, SV(""), S("klmnopqrst"));
199     test(S("abcdefghijklmnopqrst"), 0, 10, SV("12345"), S("12345klmnopqrst"));
200     test(S("abcdefghijklmnopqrst"), 0, 10, SV("1234567890"), S("1234567890klmnopqrst"));
201     test(S("abcdefghijklmnopqrst"), 0, 10, SV("12345678901234567890"), S("12345678901234567890klmnopqrst"));
202     test(S("abcdefghijklmnopqrst"), 0, 19, SV(""), S("t"));
203     test(S("abcdefghijklmnopqrst"), 0, 19, SV("12345"), S("12345t"));
204     test(S("abcdefghijklmnopqrst"), 0, 19, SV("1234567890"), S("1234567890t"));
205     test(S("abcdefghijklmnopqrst"), 0, 19, SV("12345678901234567890"), S("12345678901234567890t"));
206     test(S("abcdefghijklmnopqrst"), 0, 20, SV(""), S(""));
207     test(S("abcdefghijklmnopqrst"), 0, 20, SV("12345"), S("12345"));
208     test(S("abcdefghijklmnopqrst"), 0, 20, SV("1234567890"), S("1234567890"));
209     test(S("abcdefghijklmnopqrst"), 0, 20, SV("12345678901234567890"), S("12345678901234567890"));
210     test(S("abcdefghijklmnopqrst"), 1, 0, SV(""), S("abcdefghijklmnopqrst"));
211     test(S("abcdefghijklmnopqrst"), 1, 0, SV("12345"), S("a12345bcdefghijklmnopqrst"));
212     test(S("abcdefghijklmnopqrst"), 1, 0, SV("1234567890"), S("a1234567890bcdefghijklmnopqrst"));
213     test(S("abcdefghijklmnopqrst"), 1, 0, SV("12345678901234567890"), S("a12345678901234567890bcdefghijklmnopqrst"));
214     test(S("abcdefghijklmnopqrst"), 1, 1, SV(""), S("acdefghijklmnopqrst"));
215     test(S("abcdefghijklmnopqrst"), 1, 1, SV("12345"), S("a12345cdefghijklmnopqrst"));
216     test(S("abcdefghijklmnopqrst"), 1, 1, SV("1234567890"), S("a1234567890cdefghijklmnopqrst"));
217     test(S("abcdefghijklmnopqrst"), 1, 1, SV("12345678901234567890"), S("a12345678901234567890cdefghijklmnopqrst"));
218     test(S("abcdefghijklmnopqrst"), 1, 9, SV(""), S("aklmnopqrst"));
219     test(S("abcdefghijklmnopqrst"), 1, 9, SV("12345"), S("a12345klmnopqrst"));
220     test(S("abcdefghijklmnopqrst"), 1, 9, SV("1234567890"), S("a1234567890klmnopqrst"));
221     test(S("abcdefghijklmnopqrst"), 1, 9, SV("12345678901234567890"), S("a12345678901234567890klmnopqrst"));
222     test(S("abcdefghijklmnopqrst"), 1, 18, SV(""), S("at"));
223     test(S("abcdefghijklmnopqrst"), 1, 18, SV("12345"), S("a12345t"));
224     test(S("abcdefghijklmnopqrst"), 1, 18, SV("1234567890"), S("a1234567890t"));
225     test(S("abcdefghijklmnopqrst"), 1, 18, SV("12345678901234567890"), S("a12345678901234567890t"));
226     test(S("abcdefghijklmnopqrst"), 1, 19, SV(""), S("a"));
227     test(S("abcdefghijklmnopqrst"), 1, 19, SV("12345"), S("a12345"));
228     test(S("abcdefghijklmnopqrst"), 1, 19, SV("1234567890"), S("a1234567890"));
229     test(S("abcdefghijklmnopqrst"), 1, 19, SV("12345678901234567890"), S("a12345678901234567890"));
230     test(S("abcdefghijklmnopqrst"), 10, 0, SV(""), S("abcdefghijklmnopqrst"));
231     test(S("abcdefghijklmnopqrst"), 10, 0, SV("12345"), S("abcdefghij12345klmnopqrst"));
232     test(S("abcdefghijklmnopqrst"), 10, 0, SV("1234567890"), S("abcdefghij1234567890klmnopqrst"));
233     test(S("abcdefghijklmnopqrst"), 10, 0, SV("12345678901234567890"), S("abcdefghij12345678901234567890klmnopqrst"));
234     test(S("abcdefghijklmnopqrst"), 10, 1, SV(""), S("abcdefghijlmnopqrst"));
235     test(S("abcdefghijklmnopqrst"), 10, 1, SV("12345"), S("abcdefghij12345lmnopqrst"));
236     test(S("abcdefghijklmnopqrst"), 10, 1, SV("1234567890"), S("abcdefghij1234567890lmnopqrst"));
237     test(S("abcdefghijklmnopqrst"), 10, 1, SV("12345678901234567890"), S("abcdefghij12345678901234567890lmnopqrst"));
238     test(S("abcdefghijklmnopqrst"), 10, 5, SV(""), S("abcdefghijpqrst"));
239     test(S("abcdefghijklmnopqrst"), 10, 5, SV("12345"), S("abcdefghij12345pqrst"));
240     test(S("abcdefghijklmnopqrst"), 10, 5, SV("1234567890"), S("abcdefghij1234567890pqrst"));
241     test(S("abcdefghijklmnopqrst"), 10, 5, SV("12345678901234567890"), S("abcdefghij12345678901234567890pqrst"));
242     test(S("abcdefghijklmnopqrst"), 10, 9, SV(""), S("abcdefghijt"));
243     test(S("abcdefghijklmnopqrst"), 10, 9, SV("12345"), S("abcdefghij12345t"));
244     test(S("abcdefghijklmnopqrst"), 10, 9, SV("1234567890"), S("abcdefghij1234567890t"));
245     test(S("abcdefghijklmnopqrst"), 10, 9, SV("12345678901234567890"), S("abcdefghij12345678901234567890t"));
246 
247     return true;
248 }
249 
250 template <class S, class SV>
test2()251 TEST_CONSTEXPR_CXX20 bool test2()
252 {
253     test(S("abcdefghijklmnopqrst"), 10, 10, SV(""), S("abcdefghij"));
254     test(S("abcdefghijklmnopqrst"), 10, 10, SV("12345"), S("abcdefghij12345"));
255     test(S("abcdefghijklmnopqrst"), 10, 10, SV("1234567890"), S("abcdefghij1234567890"));
256     test(S("abcdefghijklmnopqrst"), 10, 10, SV("12345678901234567890"), S("abcdefghij12345678901234567890"));
257     test(S("abcdefghijklmnopqrst"), 19, 0, SV(""), S("abcdefghijklmnopqrst"));
258     test(S("abcdefghijklmnopqrst"), 19, 0, SV("12345"), S("abcdefghijklmnopqrs12345t"));
259     test(S("abcdefghijklmnopqrst"), 19, 0, SV("1234567890"), S("abcdefghijklmnopqrs1234567890t"));
260     test(S("abcdefghijklmnopqrst"), 19, 0, SV("12345678901234567890"), S("abcdefghijklmnopqrs12345678901234567890t"));
261     test(S("abcdefghijklmnopqrst"), 19, 1, SV(""), S("abcdefghijklmnopqrs"));
262     test(S("abcdefghijklmnopqrst"), 19, 1, SV("12345"), S("abcdefghijklmnopqrs12345"));
263     test(S("abcdefghijklmnopqrst"), 19, 1, SV("1234567890"), S("abcdefghijklmnopqrs1234567890"));
264     test(S("abcdefghijklmnopqrst"), 19, 1, SV("12345678901234567890"), S("abcdefghijklmnopqrs12345678901234567890"));
265     test(S("abcdefghijklmnopqrst"), 20, 0, SV(""), S("abcdefghijklmnopqrst"));
266     test(S("abcdefghijklmnopqrst"), 20, 0, SV("12345"), S("abcdefghijklmnopqrst12345"));
267     test(S("abcdefghijklmnopqrst"), 20, 0, SV("1234567890"), S("abcdefghijklmnopqrst1234567890"));
268     test(S("abcdefghijklmnopqrst"), 20, 0, SV("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
269 
270     return true;
271 }
272 
test()273 TEST_CONSTEXPR_CXX20 void test() {
274   {
275     typedef std::string S;
276     typedef std::string_view SV;
277     test0<S, SV>();
278     test1<S, SV>();
279     test2<S, SV>();
280 #if TEST_STD_VER > 17
281     static_assert(test0<S, SV>());
282     static_assert(test1<S, SV>());
283     static_assert(test2<S, SV>());
284 #endif
285   }
286 #if TEST_STD_VER >= 11
287   {
288     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
289     typedef std::string_view SV;
290     test0<S, SV>();
291     test1<S, SV>();
292     test2<S, SV>();
293 #if TEST_STD_VER > 17
294     static_assert(test0<S, SV>());
295     static_assert(test1<S, SV>());
296     static_assert(test2<S, SV>());
297 #endif
298   }
299 #endif
300 }
301 
main(int,char **)302 int main(int, char**)
303 {
304   test();
305 
306   return 0;
307 }
308