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 //   insert(size_type pos, const charT* s); // constexpr since C++20
13 
14 #include <string>
15 #include <stdexcept>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 #include "min_allocator.h"
20 
21 template <class S>
22 TEST_CONSTEXPR_CXX20 void
test(S s,typename S::size_type pos,const typename S::value_type * str,S expected)23 test(S s, typename S::size_type pos, const typename S::value_type* str, S expected)
24 {
25     const typename S::size_type old_size = s.size();
26     S s0 = s;
27     if (pos <= old_size)
28     {
29         s.insert(pos, str);
30         LIBCPP_ASSERT(s.__invariants());
31         assert(s == expected);
32     }
33 #ifndef TEST_HAS_NO_EXCEPTIONS
34     else if (!TEST_IS_CONSTANT_EVALUATED)
35     {
36         try
37         {
38             s.insert(pos, str);
39             assert(false);
40         }
41         catch (std::out_of_range&)
42         {
43             assert(pos > old_size);
44             assert(s == s0);
45         }
46     }
47 #endif
48 }
49 
test()50 TEST_CONSTEXPR_CXX20 bool test() {
51   {
52     typedef std::string S;
53     test(S(""), 0, "", S(""));
54     test(S(""), 0, "12345", S("12345"));
55     test(S(""), 0, "1234567890", S("1234567890"));
56     test(S(""), 0, "12345678901234567890", S("12345678901234567890"));
57     test(S(""), 1, "", S("can't happen"));
58     test(S(""), 1, "12345", S("can't happen"));
59     test(S(""), 1, "1234567890", S("can't happen"));
60     test(S(""), 1, "12345678901234567890", S("can't happen"));
61     test(S("abcde"), 0, "", S("abcde"));
62     test(S("abcde"), 0, "12345", S("12345abcde"));
63     test(S("abcde"), 0, "1234567890", S("1234567890abcde"));
64     test(S("abcde"), 0, "12345678901234567890", S("12345678901234567890abcde"));
65     test(S("abcde"), 1, "", S("abcde"));
66     test(S("abcde"), 1, "12345", S("a12345bcde"));
67     test(S("abcde"), 1, "1234567890", S("a1234567890bcde"));
68     test(S("abcde"), 1, "12345678901234567890", S("a12345678901234567890bcde"));
69     test(S("abcde"), 2, "", S("abcde"));
70     test(S("abcde"), 2, "12345", S("ab12345cde"));
71     test(S("abcde"), 2, "1234567890", S("ab1234567890cde"));
72     test(S("abcde"), 2, "12345678901234567890", S("ab12345678901234567890cde"));
73     test(S("abcde"), 4, "", S("abcde"));
74     test(S("abcde"), 4, "12345", S("abcd12345e"));
75     test(S("abcde"), 4, "1234567890", S("abcd1234567890e"));
76     test(S("abcde"), 4, "12345678901234567890", S("abcd12345678901234567890e"));
77     test(S("abcde"), 5, "", S("abcde"));
78     test(S("abcde"), 5, "12345", S("abcde12345"));
79     test(S("abcde"), 5, "1234567890", S("abcde1234567890"));
80     test(S("abcde"), 5, "12345678901234567890", S("abcde12345678901234567890"));
81     test(S("abcde"), 6, "", S("can't happen"));
82     test(S("abcde"), 6, "12345", S("can't happen"));
83     test(S("abcde"), 6, "1234567890", S("can't happen"));
84     test(S("abcde"), 6, "12345678901234567890", S("can't happen"));
85     test(S("abcdefghij"), 0, "", S("abcdefghij"));
86     test(S("abcdefghij"), 0, "12345", S("12345abcdefghij"));
87     test(S("abcdefghij"), 0, "1234567890", S("1234567890abcdefghij"));
88     test(S("abcdefghij"), 0, "12345678901234567890", S("12345678901234567890abcdefghij"));
89     test(S("abcdefghij"), 1, "", S("abcdefghij"));
90     test(S("abcdefghij"), 1, "12345", S("a12345bcdefghij"));
91     test(S("abcdefghij"), 1, "1234567890", S("a1234567890bcdefghij"));
92     test(S("abcdefghij"), 1, "12345678901234567890", S("a12345678901234567890bcdefghij"));
93     test(S("abcdefghij"), 5, "", S("abcdefghij"));
94     test(S("abcdefghij"), 5, "12345", S("abcde12345fghij"));
95     test(S("abcdefghij"), 5, "1234567890", S("abcde1234567890fghij"));
96     test(S("abcdefghij"), 5, "12345678901234567890", S("abcde12345678901234567890fghij"));
97     test(S("abcdefghij"), 9, "", S("abcdefghij"));
98     test(S("abcdefghij"), 9, "12345", S("abcdefghi12345j"));
99     test(S("abcdefghij"), 9, "1234567890", S("abcdefghi1234567890j"));
100     test(S("abcdefghij"), 9, "12345678901234567890", S("abcdefghi12345678901234567890j"));
101     test(S("abcdefghij"), 10, "", S("abcdefghij"));
102     test(S("abcdefghij"), 10, "12345", S("abcdefghij12345"));
103     test(S("abcdefghij"), 10, "1234567890", S("abcdefghij1234567890"));
104     test(S("abcdefghij"), 10, "12345678901234567890", S("abcdefghij12345678901234567890"));
105     test(S("abcdefghij"), 11, "", S("can't happen"));
106     test(S("abcdefghij"), 11, "12345", S("can't happen"));
107     test(S("abcdefghij"), 11, "1234567890", S("can't happen"));
108     test(S("abcdefghij"), 11, "12345678901234567890", S("can't happen"));
109     test(S("abcdefghijklmnopqrst"), 0, "", S("abcdefghijklmnopqrst"));
110     test(S("abcdefghijklmnopqrst"), 0, "12345", S("12345abcdefghijklmnopqrst"));
111     test(S("abcdefghijklmnopqrst"), 0, "1234567890", S("1234567890abcdefghijklmnopqrst"));
112     test(S("abcdefghijklmnopqrst"), 0, "12345678901234567890", S("12345678901234567890abcdefghijklmnopqrst"));
113     test(S("abcdefghijklmnopqrst"), 1, "", S("abcdefghijklmnopqrst"));
114     test(S("abcdefghijklmnopqrst"), 1, "12345", S("a12345bcdefghijklmnopqrst"));
115     test(S("abcdefghijklmnopqrst"), 1, "1234567890", S("a1234567890bcdefghijklmnopqrst"));
116     test(S("abcdefghijklmnopqrst"), 1, "12345678901234567890", S("a12345678901234567890bcdefghijklmnopqrst"));
117     test(S("abcdefghijklmnopqrst"), 10, "", S("abcdefghijklmnopqrst"));
118     test(S("abcdefghijklmnopqrst"), 10, "12345", S("abcdefghij12345klmnopqrst"));
119     test(S("abcdefghijklmnopqrst"), 10, "1234567890", S("abcdefghij1234567890klmnopqrst"));
120     test(S("abcdefghijklmnopqrst"), 10, "12345678901234567890", S("abcdefghij12345678901234567890klmnopqrst"));
121     test(S("abcdefghijklmnopqrst"), 19, "", S("abcdefghijklmnopqrst"));
122     test(S("abcdefghijklmnopqrst"), 19, "12345", S("abcdefghijklmnopqrs12345t"));
123     test(S("abcdefghijklmnopqrst"), 19, "1234567890", S("abcdefghijklmnopqrs1234567890t"));
124     test(S("abcdefghijklmnopqrst"), 19, "12345678901234567890", S("abcdefghijklmnopqrs12345678901234567890t"));
125     test(S("abcdefghijklmnopqrst"), 20, "", S("abcdefghijklmnopqrst"));
126     test(S("abcdefghijklmnopqrst"), 20, "12345", S("abcdefghijklmnopqrst12345"));
127     test(S("abcdefghijklmnopqrst"), 20, "1234567890", S("abcdefghijklmnopqrst1234567890"));
128     test(S("abcdefghijklmnopqrst"), 20, "12345678901234567890", S("abcdefghijklmnopqrst12345678901234567890"));
129     test(S("abcdefghijklmnopqrst"), 21, "", S("can't happen"));
130     test(S("abcdefghijklmnopqrst"), 21, "12345", S("can't happen"));
131     test(S("abcdefghijklmnopqrst"), 21, "1234567890", S("can't happen"));
132     test(S("abcdefghijklmnopqrst"), 21, "12345678901234567890", S("can't happen"));
133   }
134 #if TEST_STD_VER >= 11
135   {
136     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
137     test(S(""), 0, "", S(""));
138     test(S(""), 0, "12345", S("12345"));
139     test(S(""), 0, "1234567890", S("1234567890"));
140     test(S(""), 0, "12345678901234567890", S("12345678901234567890"));
141     test(S(""), 1, "", S("can't happen"));
142     test(S(""), 1, "12345", S("can't happen"));
143     test(S(""), 1, "1234567890", S("can't happen"));
144     test(S(""), 1, "12345678901234567890", S("can't happen"));
145     test(S("abcde"), 0, "", S("abcde"));
146     test(S("abcde"), 0, "12345", S("12345abcde"));
147     test(S("abcde"), 0, "1234567890", S("1234567890abcde"));
148     test(S("abcde"), 0, "12345678901234567890", S("12345678901234567890abcde"));
149     test(S("abcde"), 1, "", S("abcde"));
150     test(S("abcde"), 1, "12345", S("a12345bcde"));
151     test(S("abcde"), 1, "1234567890", S("a1234567890bcde"));
152     test(S("abcde"), 1, "12345678901234567890", S("a12345678901234567890bcde"));
153     test(S("abcde"), 2, "", S("abcde"));
154     test(S("abcde"), 2, "12345", S("ab12345cde"));
155     test(S("abcde"), 2, "1234567890", S("ab1234567890cde"));
156     test(S("abcde"), 2, "12345678901234567890", S("ab12345678901234567890cde"));
157     test(S("abcde"), 4, "", S("abcde"));
158     test(S("abcde"), 4, "12345", S("abcd12345e"));
159     test(S("abcde"), 4, "1234567890", S("abcd1234567890e"));
160     test(S("abcde"), 4, "12345678901234567890", S("abcd12345678901234567890e"));
161     test(S("abcde"), 5, "", S("abcde"));
162     test(S("abcde"), 5, "12345", S("abcde12345"));
163     test(S("abcde"), 5, "1234567890", S("abcde1234567890"));
164     test(S("abcde"), 5, "12345678901234567890", S("abcde12345678901234567890"));
165     test(S("abcde"), 6, "", S("can't happen"));
166     test(S("abcde"), 6, "12345", S("can't happen"));
167     test(S("abcde"), 6, "1234567890", S("can't happen"));
168     test(S("abcde"), 6, "12345678901234567890", S("can't happen"));
169     test(S("abcdefghij"), 0, "", S("abcdefghij"));
170     test(S("abcdefghij"), 0, "12345", S("12345abcdefghij"));
171     test(S("abcdefghij"), 0, "1234567890", S("1234567890abcdefghij"));
172     test(S("abcdefghij"), 0, "12345678901234567890", S("12345678901234567890abcdefghij"));
173     test(S("abcdefghij"), 1, "", S("abcdefghij"));
174     test(S("abcdefghij"), 1, "12345", S("a12345bcdefghij"));
175     test(S("abcdefghij"), 1, "1234567890", S("a1234567890bcdefghij"));
176     test(S("abcdefghij"), 1, "12345678901234567890", S("a12345678901234567890bcdefghij"));
177     test(S("abcdefghij"), 5, "", S("abcdefghij"));
178     test(S("abcdefghij"), 5, "12345", S("abcde12345fghij"));
179     test(S("abcdefghij"), 5, "1234567890", S("abcde1234567890fghij"));
180     test(S("abcdefghij"), 5, "12345678901234567890", S("abcde12345678901234567890fghij"));
181     test(S("abcdefghij"), 9, "", S("abcdefghij"));
182     test(S("abcdefghij"), 9, "12345", S("abcdefghi12345j"));
183     test(S("abcdefghij"), 9, "1234567890", S("abcdefghi1234567890j"));
184     test(S("abcdefghij"), 9, "12345678901234567890", S("abcdefghi12345678901234567890j"));
185     test(S("abcdefghij"), 10, "", S("abcdefghij"));
186     test(S("abcdefghij"), 10, "12345", S("abcdefghij12345"));
187     test(S("abcdefghij"), 10, "1234567890", S("abcdefghij1234567890"));
188     test(S("abcdefghij"), 10, "12345678901234567890", S("abcdefghij12345678901234567890"));
189     test(S("abcdefghij"), 11, "", S("can't happen"));
190     test(S("abcdefghij"), 11, "12345", S("can't happen"));
191     test(S("abcdefghij"), 11, "1234567890", S("can't happen"));
192     test(S("abcdefghij"), 11, "12345678901234567890", S("can't happen"));
193     test(S("abcdefghijklmnopqrst"), 0, "", S("abcdefghijklmnopqrst"));
194     test(S("abcdefghijklmnopqrst"), 0, "12345", S("12345abcdefghijklmnopqrst"));
195     test(S("abcdefghijklmnopqrst"), 0, "1234567890", S("1234567890abcdefghijklmnopqrst"));
196     test(S("abcdefghijklmnopqrst"), 0, "12345678901234567890", S("12345678901234567890abcdefghijklmnopqrst"));
197     test(S("abcdefghijklmnopqrst"), 1, "", S("abcdefghijklmnopqrst"));
198     test(S("abcdefghijklmnopqrst"), 1, "12345", S("a12345bcdefghijklmnopqrst"));
199     test(S("abcdefghijklmnopqrst"), 1, "1234567890", S("a1234567890bcdefghijklmnopqrst"));
200     test(S("abcdefghijklmnopqrst"), 1, "12345678901234567890", S("a12345678901234567890bcdefghijklmnopqrst"));
201     test(S("abcdefghijklmnopqrst"), 10, "", S("abcdefghijklmnopqrst"));
202     test(S("abcdefghijklmnopqrst"), 10, "12345", S("abcdefghij12345klmnopqrst"));
203     test(S("abcdefghijklmnopqrst"), 10, "1234567890", S("abcdefghij1234567890klmnopqrst"));
204     test(S("abcdefghijklmnopqrst"), 10, "12345678901234567890", S("abcdefghij12345678901234567890klmnopqrst"));
205     test(S("abcdefghijklmnopqrst"), 19, "", S("abcdefghijklmnopqrst"));
206     test(S("abcdefghijklmnopqrst"), 19, "12345", S("abcdefghijklmnopqrs12345t"));
207     test(S("abcdefghijklmnopqrst"), 19, "1234567890", S("abcdefghijklmnopqrs1234567890t"));
208     test(S("abcdefghijklmnopqrst"), 19, "12345678901234567890", S("abcdefghijklmnopqrs12345678901234567890t"));
209     test(S("abcdefghijklmnopqrst"), 20, "", S("abcdefghijklmnopqrst"));
210     test(S("abcdefghijklmnopqrst"), 20, "12345", S("abcdefghijklmnopqrst12345"));
211     test(S("abcdefghijklmnopqrst"), 20, "1234567890", S("abcdefghijklmnopqrst1234567890"));
212     test(S("abcdefghijklmnopqrst"), 20, "12345678901234567890", S("abcdefghijklmnopqrst12345678901234567890"));
213     test(S("abcdefghijklmnopqrst"), 21, "", S("can't happen"));
214     test(S("abcdefghijklmnopqrst"), 21, "12345", S("can't happen"));
215     test(S("abcdefghijklmnopqrst"), 21, "1234567890", S("can't happen"));
216     test(S("abcdefghijklmnopqrst"), 21, "12345678901234567890", S("can't happen"));
217   }
218 #endif
219 
220   { // test inserting into self
221     typedef std::string S;
222     S s_short = "123/";
223     S s_long  = "Lorem ipsum dolor sit amet, consectetur/";
224 
225     s_short.insert(0, s_short.c_str());
226     assert(s_short == "123/123/");
227     s_short.insert(0, s_short.c_str());
228     assert(s_short == "123/123/123/123/");
229     s_short.insert(0, s_short.c_str());
230     assert(s_short == "123/123/123/123/123/123/123/123/");
231 
232     s_long.insert(0, s_long.c_str());
233     assert(s_long == "Lorem ipsum dolor sit amet, consectetur/Lorem ipsum dolor sit amet, consectetur/");
234   }
235 
236   return true;
237 }
238 
main(int,char **)239 int main(int, char**)
240 {
241   test();
242 #if TEST_STD_VER > 17
243   static_assert(test());
244 #endif
245 
246   return 0;
247 }
248