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 // XFAIL: libcpp-no-exceptions
11 // <string>
12 
13 // const_reference at(size_type pos) const;
14 //       reference at(size_type pos);
15 
16 #include <string>
17 #include <stdexcept>
18 #include <cassert>
19 
20 #include "min_allocator.h"
21 
22 template <class S>
23 void
24 test(S s, typename S::size_type pos)
25 {
26     try
27     {
28         const S& cs = s;
29         assert(s.at(pos) == s[pos]);
30         assert(cs.at(pos) == cs[pos]);
31         assert(pos < cs.size());
32     }
33     catch (std::out_of_range&)
34     {
35         assert(pos >= s.size());
36     }
37 }
38 
39 int main()
40 {
41     {
42     typedef std::string S;
43     test(S(), 0);
44     test(S("123"), 0);
45     test(S("123"), 1);
46     test(S("123"), 2);
47     test(S("123"), 3);
48     }
49 #if TEST_STD_VER >= 11
50     {
51     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
52     test(S(), 0);
53     test(S("123"), 0);
54     test(S("123"), 1);
55     test(S("123"), 2);
56     test(S("123"), 3);
57     }
58 #endif
59 }
60