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>
11 
12 // basic_string<charT,traits,Allocator>&
13 //   append(const charT* s, size_type n);
14 
15 #include <string>
16 #include <stdexcept>
17 #include <cassert>
18 
19 #include "../../min_allocator.h"
20 
21 template <class S>
22 void
23 test(S s, const typename S::value_type* str, typename S::size_type n, S expected)
24 {
25     s.append(str, n);
26     assert(s.__invariants());
27     assert(s == expected);
28 }
29 
30 int main()
31 {
32     {
33     typedef std::string S;
34     test(S(), "", 0, S());
35     test(S(), "12345", 3, S("123"));
36     test(S(), "12345", 4, S("1234"));
37     test(S(), "12345678901234567890", 0, S());
38     test(S(), "12345678901234567890", 1, S("1"));
39     test(S(), "12345678901234567890", 3, S("123"));
40     test(S(), "12345678901234567890", 20, S("12345678901234567890"));
41 
42     test(S("12345"), "", 0, S("12345"));
43     test(S("12345"), "12345", 5, S("1234512345"));
44     test(S("12345"), "1234567890", 10, S("123451234567890"));
45 
46     test(S("12345678901234567890"), "", 0, S("12345678901234567890"));
47     test(S("12345678901234567890"), "12345", 5, S("1234567890123456789012345"));
48     test(S("12345678901234567890"), "12345678901234567890", 20,
49          S("1234567890123456789012345678901234567890"));
50     }
51 #if __cplusplus >= 201103L
52     {
53     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
54     test(S(), "", 0, S());
55     test(S(), "12345", 3, S("123"));
56     test(S(), "12345", 4, S("1234"));
57     test(S(), "12345678901234567890", 0, S());
58     test(S(), "12345678901234567890", 1, S("1"));
59     test(S(), "12345678901234567890", 3, S("123"));
60     test(S(), "12345678901234567890", 20, S("12345678901234567890"));
61 
62     test(S("12345"), "", 0, S("12345"));
63     test(S("12345"), "12345", 5, S("1234512345"));
64     test(S("12345"), "1234567890", 10, S("123451234567890"));
65 
66     test(S("12345678901234567890"), "", 0, S("12345678901234567890"));
67     test(S("12345678901234567890"), "12345", 5, S("1234567890123456789012345"));
68     test(S("12345678901234567890"), "12345678901234567890", 20,
69          S("1234567890123456789012345678901234567890"));
70     }
71 #endif
72 }
73