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(size_type pos1, size_type n1, const basic_string<charT,traits,Allocator>& str);
13 
14 #include <string>
15 #include <stdexcept>
16 #include <algorithm>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 #include "min_allocator.h"
21 
22 template <class S>
23 void
test(S s,typename S::size_type pos1,typename S::size_type n1,S str,S expected)24 test(S s, typename S::size_type pos1, typename S::size_type n1, S str, S expected)
25 {
26     const typename S::size_type old_size = s.size();
27     S s0 = s;
28     if (pos1 <= old_size)
29     {
30         s.replace(pos1, n1, str);
31         LIBCPP_ASSERT(s.__invariants());
32         assert(s == expected);
33         typename S::size_type xlen = std::min(n1, old_size - pos1);
34         typename S::size_type rlen = str.size();
35         assert(s.size() == old_size - xlen + rlen);
36     }
37 #ifndef TEST_HAS_NO_EXCEPTIONS
38     else
39     {
40         try
41         {
42             s.replace(pos1, n1, str);
43             assert(false);
44         }
45         catch (std::out_of_range&)
46         {
47             assert(pos1 > old_size);
48             assert(s == s0);
49         }
50     }
51 #endif
52 }
53 
54 template <class S>
test0()55 void test0()
56 {
57     test(S(""), 0, 0, S(""), S(""));
58     test(S(""), 0, 0, S("12345"), S("12345"));
59     test(S(""), 0, 0, S("1234567890"), S("1234567890"));
60     test(S(""), 0, 0, S("12345678901234567890"), S("12345678901234567890"));
61     test(S(""), 0, 1, S(""), S(""));
62     test(S(""), 0, 1, S("12345"), S("12345"));
63     test(S(""), 0, 1, S("1234567890"), S("1234567890"));
64     test(S(""), 0, 1, S("12345678901234567890"), S("12345678901234567890"));
65     test(S(""), 1, 0, S(""), S("can't happen"));
66     test(S(""), 1, 0, S("12345"), S("can't happen"));
67     test(S(""), 1, 0, S("1234567890"), S("can't happen"));
68     test(S(""), 1, 0, S("12345678901234567890"), S("can't happen"));
69     test(S("abcde"), 0, 0, S(""), S("abcde"));
70     test(S("abcde"), 0, 0, S("12345"), S("12345abcde"));
71     test(S("abcde"), 0, 0, S("1234567890"), S("1234567890abcde"));
72     test(S("abcde"), 0, 0, S("12345678901234567890"), S("12345678901234567890abcde"));
73     test(S("abcde"), 0, 1, S(""), S("bcde"));
74     test(S("abcde"), 0, 1, S("12345"), S("12345bcde"));
75     test(S("abcde"), 0, 1, S("1234567890"), S("1234567890bcde"));
76     test(S("abcde"), 0, 1, S("12345678901234567890"), S("12345678901234567890bcde"));
77     test(S("abcde"), 0, 2, S(""), S("cde"));
78     test(S("abcde"), 0, 2, S("12345"), S("12345cde"));
79     test(S("abcde"), 0, 2, S("1234567890"), S("1234567890cde"));
80     test(S("abcde"), 0, 2, S("12345678901234567890"), S("12345678901234567890cde"));
81     test(S("abcde"), 0, 4, S(""), S("e"));
82     test(S("abcde"), 0, 4, S("12345"), S("12345e"));
83     test(S("abcde"), 0, 4, S("1234567890"), S("1234567890e"));
84     test(S("abcde"), 0, 4, S("12345678901234567890"), S("12345678901234567890e"));
85     test(S("abcde"), 0, 5, S(""), S(""));
86     test(S("abcde"), 0, 5, S("12345"), S("12345"));
87     test(S("abcde"), 0, 5, S("1234567890"), S("1234567890"));
88     test(S("abcde"), 0, 5, S("12345678901234567890"), S("12345678901234567890"));
89     test(S("abcde"), 0, 6, S(""), S(""));
90     test(S("abcde"), 0, 6, S("12345"), S("12345"));
91     test(S("abcde"), 0, 6, S("1234567890"), S("1234567890"));
92     test(S("abcde"), 0, 6, S("12345678901234567890"), S("12345678901234567890"));
93     test(S("abcde"), 1, 0, S(""), S("abcde"));
94     test(S("abcde"), 1, 0, S("12345"), S("a12345bcde"));
95     test(S("abcde"), 1, 0, S("1234567890"), S("a1234567890bcde"));
96     test(S("abcde"), 1, 0, S("12345678901234567890"), S("a12345678901234567890bcde"));
97     test(S("abcde"), 1, 1, S(""), S("acde"));
98     test(S("abcde"), 1, 1, S("12345"), S("a12345cde"));
99     test(S("abcde"), 1, 1, S("1234567890"), S("a1234567890cde"));
100     test(S("abcde"), 1, 1, S("12345678901234567890"), S("a12345678901234567890cde"));
101     test(S("abcde"), 1, 2, S(""), S("ade"));
102     test(S("abcde"), 1, 2, S("12345"), S("a12345de"));
103     test(S("abcde"), 1, 2, S("1234567890"), S("a1234567890de"));
104     test(S("abcde"), 1, 2, S("12345678901234567890"), S("a12345678901234567890de"));
105     test(S("abcde"), 1, 3, S(""), S("ae"));
106     test(S("abcde"), 1, 3, S("12345"), S("a12345e"));
107     test(S("abcde"), 1, 3, S("1234567890"), S("a1234567890e"));
108     test(S("abcde"), 1, 3, S("12345678901234567890"), S("a12345678901234567890e"));
109     test(S("abcde"), 1, 4, S(""), S("a"));
110     test(S("abcde"), 1, 4, S("12345"), S("a12345"));
111     test(S("abcde"), 1, 4, S("1234567890"), S("a1234567890"));
112     test(S("abcde"), 1, 4, S("12345678901234567890"), S("a12345678901234567890"));
113     test(S("abcde"), 1, 5, S(""), S("a"));
114     test(S("abcde"), 1, 5, S("12345"), S("a12345"));
115     test(S("abcde"), 1, 5, S("1234567890"), S("a1234567890"));
116     test(S("abcde"), 1, 5, S("12345678901234567890"), S("a12345678901234567890"));
117     test(S("abcde"), 2, 0, S(""), S("abcde"));
118     test(S("abcde"), 2, 0, S("12345"), S("ab12345cde"));
119     test(S("abcde"), 2, 0, S("1234567890"), S("ab1234567890cde"));
120     test(S("abcde"), 2, 0, S("12345678901234567890"), S("ab12345678901234567890cde"));
121     test(S("abcde"), 2, 1, S(""), S("abde"));
122     test(S("abcde"), 2, 1, S("12345"), S("ab12345de"));
123     test(S("abcde"), 2, 1, S("1234567890"), S("ab1234567890de"));
124     test(S("abcde"), 2, 1, S("12345678901234567890"), S("ab12345678901234567890de"));
125     test(S("abcde"), 2, 2, S(""), S("abe"));
126     test(S("abcde"), 2, 2, S("12345"), S("ab12345e"));
127     test(S("abcde"), 2, 2, S("1234567890"), S("ab1234567890e"));
128     test(S("abcde"), 2, 2, S("12345678901234567890"), S("ab12345678901234567890e"));
129     test(S("abcde"), 2, 3, S(""), S("ab"));
130     test(S("abcde"), 2, 3, S("12345"), S("ab12345"));
131     test(S("abcde"), 2, 3, S("1234567890"), S("ab1234567890"));
132     test(S("abcde"), 2, 3, S("12345678901234567890"), S("ab12345678901234567890"));
133     test(S("abcde"), 2, 4, S(""), S("ab"));
134     test(S("abcde"), 2, 4, S("12345"), S("ab12345"));
135     test(S("abcde"), 2, 4, S("1234567890"), S("ab1234567890"));
136     test(S("abcde"), 2, 4, S("12345678901234567890"), S("ab12345678901234567890"));
137     test(S("abcde"), 4, 0, S(""), S("abcde"));
138     test(S("abcde"), 4, 0, S("12345"), S("abcd12345e"));
139     test(S("abcde"), 4, 0, S("1234567890"), S("abcd1234567890e"));
140     test(S("abcde"), 4, 0, S("12345678901234567890"), S("abcd12345678901234567890e"));
141     test(S("abcde"), 4, 1, S(""), S("abcd"));
142     test(S("abcde"), 4, 1, S("12345"), S("abcd12345"));
143     test(S("abcde"), 4, 1, S("1234567890"), S("abcd1234567890"));
144     test(S("abcde"), 4, 1, S("12345678901234567890"), S("abcd12345678901234567890"));
145     test(S("abcde"), 4, 2, S(""), S("abcd"));
146     test(S("abcde"), 4, 2, S("12345"), S("abcd12345"));
147     test(S("abcde"), 4, 2, S("1234567890"), S("abcd1234567890"));
148     test(S("abcde"), 4, 2, S("12345678901234567890"), S("abcd12345678901234567890"));
149     test(S("abcde"), 5, 0, S(""), S("abcde"));
150     test(S("abcde"), 5, 0, S("12345"), S("abcde12345"));
151     test(S("abcde"), 5, 0, S("1234567890"), S("abcde1234567890"));
152     test(S("abcde"), 5, 0, S("12345678901234567890"), S("abcde12345678901234567890"));
153     test(S("abcde"), 5, 1, S(""), S("abcde"));
154     test(S("abcde"), 5, 1, S("12345"), S("abcde12345"));
155     test(S("abcde"), 5, 1, S("1234567890"), S("abcde1234567890"));
156     test(S("abcde"), 5, 1, S("12345678901234567890"), S("abcde12345678901234567890"));
157 }
158 
159 template <class S>
test1()160 void test1()
161 {
162     test(S("abcde"), 6, 0, S(""), S("can't happen"));
163     test(S("abcde"), 6, 0, S("12345"), S("can't happen"));
164     test(S("abcde"), 6, 0, S("1234567890"), S("can't happen"));
165     test(S("abcde"), 6, 0, S("12345678901234567890"), S("can't happen"));
166     test(S("abcdefghij"), 0, 0, S(""), S("abcdefghij"));
167     test(S("abcdefghij"), 0, 0, S("12345"), S("12345abcdefghij"));
168     test(S("abcdefghij"), 0, 0, S("1234567890"), S("1234567890abcdefghij"));
169     test(S("abcdefghij"), 0, 0, S("12345678901234567890"), S("12345678901234567890abcdefghij"));
170     test(S("abcdefghij"), 0, 1, S(""), S("bcdefghij"));
171     test(S("abcdefghij"), 0, 1, S("12345"), S("12345bcdefghij"));
172     test(S("abcdefghij"), 0, 1, S("1234567890"), S("1234567890bcdefghij"));
173     test(S("abcdefghij"), 0, 1, S("12345678901234567890"), S("12345678901234567890bcdefghij"));
174     test(S("abcdefghij"), 0, 5, S(""), S("fghij"));
175     test(S("abcdefghij"), 0, 5, S("12345"), S("12345fghij"));
176     test(S("abcdefghij"), 0, 5, S("1234567890"), S("1234567890fghij"));
177     test(S("abcdefghij"), 0, 5, S("12345678901234567890"), S("12345678901234567890fghij"));
178     test(S("abcdefghij"), 0, 9, S(""), S("j"));
179     test(S("abcdefghij"), 0, 9, S("12345"), S("12345j"));
180     test(S("abcdefghij"), 0, 9, S("1234567890"), S("1234567890j"));
181     test(S("abcdefghij"), 0, 9, S("12345678901234567890"), S("12345678901234567890j"));
182     test(S("abcdefghij"), 0, 10, S(""), S(""));
183     test(S("abcdefghij"), 0, 10, S("12345"), S("12345"));
184     test(S("abcdefghij"), 0, 10, S("1234567890"), S("1234567890"));
185     test(S("abcdefghij"), 0, 10, S("12345678901234567890"), S("12345678901234567890"));
186     test(S("abcdefghij"), 0, 11, S(""), S(""));
187     test(S("abcdefghij"), 0, 11, S("12345"), S("12345"));
188     test(S("abcdefghij"), 0, 11, S("1234567890"), S("1234567890"));
189     test(S("abcdefghij"), 0, 11, S("12345678901234567890"), S("12345678901234567890"));
190     test(S("abcdefghij"), 1, 0, S(""), S("abcdefghij"));
191     test(S("abcdefghij"), 1, 0, S("12345"), S("a12345bcdefghij"));
192     test(S("abcdefghij"), 1, 0, S("1234567890"), S("a1234567890bcdefghij"));
193     test(S("abcdefghij"), 1, 0, S("12345678901234567890"), S("a12345678901234567890bcdefghij"));
194     test(S("abcdefghij"), 1, 1, S(""), S("acdefghij"));
195     test(S("abcdefghij"), 1, 1, S("12345"), S("a12345cdefghij"));
196     test(S("abcdefghij"), 1, 1, S("1234567890"), S("a1234567890cdefghij"));
197     test(S("abcdefghij"), 1, 1, S("12345678901234567890"), S("a12345678901234567890cdefghij"));
198     test(S("abcdefghij"), 1, 4, S(""), S("afghij"));
199     test(S("abcdefghij"), 1, 4, S("12345"), S("a12345fghij"));
200     test(S("abcdefghij"), 1, 4, S("1234567890"), S("a1234567890fghij"));
201     test(S("abcdefghij"), 1, 4, S("12345678901234567890"), S("a12345678901234567890fghij"));
202     test(S("abcdefghij"), 1, 8, S(""), S("aj"));
203     test(S("abcdefghij"), 1, 8, S("12345"), S("a12345j"));
204     test(S("abcdefghij"), 1, 8, S("1234567890"), S("a1234567890j"));
205     test(S("abcdefghij"), 1, 8, S("12345678901234567890"), S("a12345678901234567890j"));
206     test(S("abcdefghij"), 1, 9, S(""), S("a"));
207     test(S("abcdefghij"), 1, 9, S("12345"), S("a12345"));
208     test(S("abcdefghij"), 1, 9, S("1234567890"), S("a1234567890"));
209     test(S("abcdefghij"), 1, 9, S("12345678901234567890"), S("a12345678901234567890"));
210     test(S("abcdefghij"), 1, 10, S(""), S("a"));
211     test(S("abcdefghij"), 1, 10, S("12345"), S("a12345"));
212     test(S("abcdefghij"), 1, 10, S("1234567890"), S("a1234567890"));
213     test(S("abcdefghij"), 1, 10, S("12345678901234567890"), S("a12345678901234567890"));
214     test(S("abcdefghij"), 5, 0, S(""), S("abcdefghij"));
215     test(S("abcdefghij"), 5, 0, S("12345"), S("abcde12345fghij"));
216     test(S("abcdefghij"), 5, 0, S("1234567890"), S("abcde1234567890fghij"));
217     test(S("abcdefghij"), 5, 0, S("12345678901234567890"), S("abcde12345678901234567890fghij"));
218     test(S("abcdefghij"), 5, 1, S(""), S("abcdeghij"));
219     test(S("abcdefghij"), 5, 1, S("12345"), S("abcde12345ghij"));
220     test(S("abcdefghij"), 5, 1, S("1234567890"), S("abcde1234567890ghij"));
221     test(S("abcdefghij"), 5, 1, S("12345678901234567890"), S("abcde12345678901234567890ghij"));
222     test(S("abcdefghij"), 5, 2, S(""), S("abcdehij"));
223     test(S("abcdefghij"), 5, 2, S("12345"), S("abcde12345hij"));
224     test(S("abcdefghij"), 5, 2, S("1234567890"), S("abcde1234567890hij"));
225     test(S("abcdefghij"), 5, 2, S("12345678901234567890"), S("abcde12345678901234567890hij"));
226     test(S("abcdefghij"), 5, 4, S(""), S("abcdej"));
227     test(S("abcdefghij"), 5, 4, S("12345"), S("abcde12345j"));
228     test(S("abcdefghij"), 5, 4, S("1234567890"), S("abcde1234567890j"));
229     test(S("abcdefghij"), 5, 4, S("12345678901234567890"), S("abcde12345678901234567890j"));
230     test(S("abcdefghij"), 5, 5, S(""), S("abcde"));
231     test(S("abcdefghij"), 5, 5, S("12345"), S("abcde12345"));
232     test(S("abcdefghij"), 5, 5, S("1234567890"), S("abcde1234567890"));
233     test(S("abcdefghij"), 5, 5, S("12345678901234567890"), S("abcde12345678901234567890"));
234     test(S("abcdefghij"), 5, 6, S(""), S("abcde"));
235     test(S("abcdefghij"), 5, 6, S("12345"), S("abcde12345"));
236     test(S("abcdefghij"), 5, 6, S("1234567890"), S("abcde1234567890"));
237     test(S("abcdefghij"), 5, 6, S("12345678901234567890"), S("abcde12345678901234567890"));
238     test(S("abcdefghij"), 9, 0, S(""), S("abcdefghij"));
239     test(S("abcdefghij"), 9, 0, S("12345"), S("abcdefghi12345j"));
240     test(S("abcdefghij"), 9, 0, S("1234567890"), S("abcdefghi1234567890j"));
241     test(S("abcdefghij"), 9, 0, S("12345678901234567890"), S("abcdefghi12345678901234567890j"));
242     test(S("abcdefghij"), 9, 1, S(""), S("abcdefghi"));
243     test(S("abcdefghij"), 9, 1, S("12345"), S("abcdefghi12345"));
244     test(S("abcdefghij"), 9, 1, S("1234567890"), S("abcdefghi1234567890"));
245     test(S("abcdefghij"), 9, 1, S("12345678901234567890"), S("abcdefghi12345678901234567890"));
246     test(S("abcdefghij"), 9, 2, S(""), S("abcdefghi"));
247     test(S("abcdefghij"), 9, 2, S("12345"), S("abcdefghi12345"));
248     test(S("abcdefghij"), 9, 2, S("1234567890"), S("abcdefghi1234567890"));
249     test(S("abcdefghij"), 9, 2, S("12345678901234567890"), S("abcdefghi12345678901234567890"));
250     test(S("abcdefghij"), 10, 0, S(""), S("abcdefghij"));
251     test(S("abcdefghij"), 10, 0, S("12345"), S("abcdefghij12345"));
252     test(S("abcdefghij"), 10, 0, S("1234567890"), S("abcdefghij1234567890"));
253     test(S("abcdefghij"), 10, 0, S("12345678901234567890"), S("abcdefghij12345678901234567890"));
254     test(S("abcdefghij"), 10, 1, S(""), S("abcdefghij"));
255     test(S("abcdefghij"), 10, 1, S("12345"), S("abcdefghij12345"));
256     test(S("abcdefghij"), 10, 1, S("1234567890"), S("abcdefghij1234567890"));
257     test(S("abcdefghij"), 10, 1, S("12345678901234567890"), S("abcdefghij12345678901234567890"));
258     test(S("abcdefghij"), 11, 0, S(""), S("can't happen"));
259     test(S("abcdefghij"), 11, 0, S("12345"), S("can't happen"));
260     test(S("abcdefghij"), 11, 0, S("1234567890"), S("can't happen"));
261     test(S("abcdefghij"), 11, 0, S("12345678901234567890"), S("can't happen"));
262 }
263 
264 template <class S>
test2()265 void test2()
266 {
267     test(S("abcdefghijklmnopqrst"), 0, 0, S(""), S("abcdefghijklmnopqrst"));
268     test(S("abcdefghijklmnopqrst"), 0, 0, S("12345"), S("12345abcdefghijklmnopqrst"));
269     test(S("abcdefghijklmnopqrst"), 0, 0, S("1234567890"), S("1234567890abcdefghijklmnopqrst"));
270     test(S("abcdefghijklmnopqrst"), 0, 0, S("12345678901234567890"), S("12345678901234567890abcdefghijklmnopqrst"));
271     test(S("abcdefghijklmnopqrst"), 0, 1, S(""), S("bcdefghijklmnopqrst"));
272     test(S("abcdefghijklmnopqrst"), 0, 1, S("12345"), S("12345bcdefghijklmnopqrst"));
273     test(S("abcdefghijklmnopqrst"), 0, 1, S("1234567890"), S("1234567890bcdefghijklmnopqrst"));
274     test(S("abcdefghijklmnopqrst"), 0, 1, S("12345678901234567890"), S("12345678901234567890bcdefghijklmnopqrst"));
275     test(S("abcdefghijklmnopqrst"), 0, 10, S(""), S("klmnopqrst"));
276     test(S("abcdefghijklmnopqrst"), 0, 10, S("12345"), S("12345klmnopqrst"));
277     test(S("abcdefghijklmnopqrst"), 0, 10, S("1234567890"), S("1234567890klmnopqrst"));
278     test(S("abcdefghijklmnopqrst"), 0, 10, S("12345678901234567890"), S("12345678901234567890klmnopqrst"));
279     test(S("abcdefghijklmnopqrst"), 0, 19, S(""), S("t"));
280     test(S("abcdefghijklmnopqrst"), 0, 19, S("12345"), S("12345t"));
281     test(S("abcdefghijklmnopqrst"), 0, 19, S("1234567890"), S("1234567890t"));
282     test(S("abcdefghijklmnopqrst"), 0, 19, S("12345678901234567890"), S("12345678901234567890t"));
283     test(S("abcdefghijklmnopqrst"), 0, 20, S(""), S(""));
284     test(S("abcdefghijklmnopqrst"), 0, 20, S("12345"), S("12345"));
285     test(S("abcdefghijklmnopqrst"), 0, 20, S("1234567890"), S("1234567890"));
286     test(S("abcdefghijklmnopqrst"), 0, 20, S("12345678901234567890"), S("12345678901234567890"));
287     test(S("abcdefghijklmnopqrst"), 0, 21, S(""), S(""));
288     test(S("abcdefghijklmnopqrst"), 0, 21, S("12345"), S("12345"));
289     test(S("abcdefghijklmnopqrst"), 0, 21, S("1234567890"), S("1234567890"));
290     test(S("abcdefghijklmnopqrst"), 0, 21, S("12345678901234567890"), S("12345678901234567890"));
291     test(S("abcdefghijklmnopqrst"), 1, 0, S(""), S("abcdefghijklmnopqrst"));
292     test(S("abcdefghijklmnopqrst"), 1, 0, S("12345"), S("a12345bcdefghijklmnopqrst"));
293     test(S("abcdefghijklmnopqrst"), 1, 0, S("1234567890"), S("a1234567890bcdefghijklmnopqrst"));
294     test(S("abcdefghijklmnopqrst"), 1, 0, S("12345678901234567890"), S("a12345678901234567890bcdefghijklmnopqrst"));
295     test(S("abcdefghijklmnopqrst"), 1, 1, S(""), S("acdefghijklmnopqrst"));
296     test(S("abcdefghijklmnopqrst"), 1, 1, S("12345"), S("a12345cdefghijklmnopqrst"));
297     test(S("abcdefghijklmnopqrst"), 1, 1, S("1234567890"), S("a1234567890cdefghijklmnopqrst"));
298     test(S("abcdefghijklmnopqrst"), 1, 1, S("12345678901234567890"), S("a12345678901234567890cdefghijklmnopqrst"));
299     test(S("abcdefghijklmnopqrst"), 1, 9, S(""), S("aklmnopqrst"));
300     test(S("abcdefghijklmnopqrst"), 1, 9, S("12345"), S("a12345klmnopqrst"));
301     test(S("abcdefghijklmnopqrst"), 1, 9, S("1234567890"), S("a1234567890klmnopqrst"));
302     test(S("abcdefghijklmnopqrst"), 1, 9, S("12345678901234567890"), S("a12345678901234567890klmnopqrst"));
303     test(S("abcdefghijklmnopqrst"), 1, 18, S(""), S("at"));
304     test(S("abcdefghijklmnopqrst"), 1, 18, S("12345"), S("a12345t"));
305     test(S("abcdefghijklmnopqrst"), 1, 18, S("1234567890"), S("a1234567890t"));
306     test(S("abcdefghijklmnopqrst"), 1, 18, S("12345678901234567890"), S("a12345678901234567890t"));
307     test(S("abcdefghijklmnopqrst"), 1, 19, S(""), S("a"));
308     test(S("abcdefghijklmnopqrst"), 1, 19, S("12345"), S("a12345"));
309     test(S("abcdefghijklmnopqrst"), 1, 19, S("1234567890"), S("a1234567890"));
310     test(S("abcdefghijklmnopqrst"), 1, 19, S("12345678901234567890"), S("a12345678901234567890"));
311     test(S("abcdefghijklmnopqrst"), 1, 20, S(""), S("a"));
312     test(S("abcdefghijklmnopqrst"), 1, 20, S("12345"), S("a12345"));
313     test(S("abcdefghijklmnopqrst"), 1, 20, S("1234567890"), S("a1234567890"));
314     test(S("abcdefghijklmnopqrst"), 1, 20, S("12345678901234567890"), S("a12345678901234567890"));
315     test(S("abcdefghijklmnopqrst"), 10, 0, S(""), S("abcdefghijklmnopqrst"));
316     test(S("abcdefghijklmnopqrst"), 10, 0, S("12345"), S("abcdefghij12345klmnopqrst"));
317     test(S("abcdefghijklmnopqrst"), 10, 0, S("1234567890"), S("abcdefghij1234567890klmnopqrst"));
318     test(S("abcdefghijklmnopqrst"), 10, 0, S("12345678901234567890"), S("abcdefghij12345678901234567890klmnopqrst"));
319     test(S("abcdefghijklmnopqrst"), 10, 1, S(""), S("abcdefghijlmnopqrst"));
320     test(S("abcdefghijklmnopqrst"), 10, 1, S("12345"), S("abcdefghij12345lmnopqrst"));
321     test(S("abcdefghijklmnopqrst"), 10, 1, S("1234567890"), S("abcdefghij1234567890lmnopqrst"));
322     test(S("abcdefghijklmnopqrst"), 10, 1, S("12345678901234567890"), S("abcdefghij12345678901234567890lmnopqrst"));
323     test(S("abcdefghijklmnopqrst"), 10, 5, S(""), S("abcdefghijpqrst"));
324     test(S("abcdefghijklmnopqrst"), 10, 5, S("12345"), S("abcdefghij12345pqrst"));
325     test(S("abcdefghijklmnopqrst"), 10, 5, S("1234567890"), S("abcdefghij1234567890pqrst"));
326     test(S("abcdefghijklmnopqrst"), 10, 5, S("12345678901234567890"), S("abcdefghij12345678901234567890pqrst"));
327     test(S("abcdefghijklmnopqrst"), 10, 9, S(""), S("abcdefghijt"));
328     test(S("abcdefghijklmnopqrst"), 10, 9, S("12345"), S("abcdefghij12345t"));
329     test(S("abcdefghijklmnopqrst"), 10, 9, S("1234567890"), S("abcdefghij1234567890t"));
330     test(S("abcdefghijklmnopqrst"), 10, 9, S("12345678901234567890"), S("abcdefghij12345678901234567890t"));
331     test(S("abcdefghijklmnopqrst"), 10, 10, S(""), S("abcdefghij"));
332     test(S("abcdefghijklmnopqrst"), 10, 10, S("12345"), S("abcdefghij12345"));
333     test(S("abcdefghijklmnopqrst"), 10, 10, S("1234567890"), S("abcdefghij1234567890"));
334     test(S("abcdefghijklmnopqrst"), 10, 10, S("12345678901234567890"), S("abcdefghij12345678901234567890"));
335     test(S("abcdefghijklmnopqrst"), 10, 11, S(""), S("abcdefghij"));
336     test(S("abcdefghijklmnopqrst"), 10, 11, S("12345"), S("abcdefghij12345"));
337     test(S("abcdefghijklmnopqrst"), 10, 11, S("1234567890"), S("abcdefghij1234567890"));
338     test(S("abcdefghijklmnopqrst"), 10, 11, S("12345678901234567890"), S("abcdefghij12345678901234567890"));
339     test(S("abcdefghijklmnopqrst"), 19, 0, S(""), S("abcdefghijklmnopqrst"));
340     test(S("abcdefghijklmnopqrst"), 19, 0, S("12345"), S("abcdefghijklmnopqrs12345t"));
341     test(S("abcdefghijklmnopqrst"), 19, 0, S("1234567890"), S("abcdefghijklmnopqrs1234567890t"));
342     test(S("abcdefghijklmnopqrst"), 19, 0, S("12345678901234567890"), S("abcdefghijklmnopqrs12345678901234567890t"));
343     test(S("abcdefghijklmnopqrst"), 19, 1, S(""), S("abcdefghijklmnopqrs"));
344     test(S("abcdefghijklmnopqrst"), 19, 1, S("12345"), S("abcdefghijklmnopqrs12345"));
345     test(S("abcdefghijklmnopqrst"), 19, 1, S("1234567890"), S("abcdefghijklmnopqrs1234567890"));
346     test(S("abcdefghijklmnopqrst"), 19, 1, S("12345678901234567890"), S("abcdefghijklmnopqrs12345678901234567890"));
347     test(S("abcdefghijklmnopqrst"), 19, 2, S(""), S("abcdefghijklmnopqrs"));
348     test(S("abcdefghijklmnopqrst"), 19, 2, S("12345"), S("abcdefghijklmnopqrs12345"));
349     test(S("abcdefghijklmnopqrst"), 19, 2, S("1234567890"), S("abcdefghijklmnopqrs1234567890"));
350     test(S("abcdefghijklmnopqrst"), 19, 2, S("12345678901234567890"), S("abcdefghijklmnopqrs12345678901234567890"));
351     test(S("abcdefghijklmnopqrst"), 20, 0, S(""), S("abcdefghijklmnopqrst"));
352     test(S("abcdefghijklmnopqrst"), 20, 0, S("12345"), S("abcdefghijklmnopqrst12345"));
353     test(S("abcdefghijklmnopqrst"), 20, 0, S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
354     test(S("abcdefghijklmnopqrst"), 20, 0, S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
355     test(S("abcdefghijklmnopqrst"), 20, 1, S(""), S("abcdefghijklmnopqrst"));
356     test(S("abcdefghijklmnopqrst"), 20, 1, S("12345"), S("abcdefghijklmnopqrst12345"));
357     test(S("abcdefghijklmnopqrst"), 20, 1, S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
358     test(S("abcdefghijklmnopqrst"), 20, 1, S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
359     test(S("abcdefghijklmnopqrst"), 21, 0, S(""), S("can't happen"));
360     test(S("abcdefghijklmnopqrst"), 21, 0, S("12345"), S("can't happen"));
361     test(S("abcdefghijklmnopqrst"), 21, 0, S("1234567890"), S("can't happen"));
362     test(S("abcdefghijklmnopqrst"), 21, 0, S("12345678901234567890"), S("can't happen"));
363 }
364 
main(int,char **)365 int main(int, char**)
366 {
367     {
368     typedef std::string S;
369     test0<S>();
370     test1<S>();
371     test2<S>();
372     }
373 #if TEST_STD_VER >= 11
374     {
375     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
376     test0<S>();
377     test1<S>();
378     test2<S>();
379     }
380 #endif
381 
382 #if TEST_STD_VER > 3
383     {   // LWG 2946
384     std::string s = " ";
385     s.replace(0, 1, {"abc", 1});
386     assert(s.size() == 1);
387     assert(s == "a");
388     }
389 #endif
390 
391   return 0;
392 }
393