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 // const_reference at(size_type pos) const;
13 // reference at(size_type pos);
14
15 #include <string>
16 #include <stdexcept>
17 #include <cassert>
18
19 #include "min_allocator.h"
20
21 #include "test_macros.h"
22
23 template <class S>
24 void
test(S s,typename S::size_type pos)25 test(S s, typename S::size_type pos)
26 {
27 const S& cs = s;
28 if (pos < s.size())
29 {
30 assert(s.at(pos) == s[pos]);
31 assert(cs.at(pos) == cs[pos]);
32 }
33 #ifndef TEST_HAS_NO_EXCEPTIONS
34 else
35 {
36 try
37 {
38 s.at(pos);
39 assert(false);
40 }
41 catch (std::out_of_range&)
42 {
43 assert(pos >= s.size());
44 }
45 try
46 {
47 cs.at(pos);
48 assert(false);
49 }
50 catch (std::out_of_range&)
51 {
52 assert(pos >= s.size());
53 }
54 }
55 #endif
56 }
57
main()58 int main()
59 {
60 {
61 typedef std::string S;
62 test(S(), 0);
63 test(S("123"), 0);
64 test(S("123"), 1);
65 test(S("123"), 2);
66 test(S("123"), 3);
67 }
68 #if TEST_STD_VER >= 11
69 {
70 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
71 test(S(), 0);
72 test(S("123"), 0);
73 test(S("123"), 1);
74 test(S("123"), 2);
75 test(S("123"), 3);
76 }
77 #endif
78 }
79