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
21template <class S>
22void
23test(S s, typename S::size_type pos)
24{
25    try
26    {
27        const S& cs = s;
28        assert(s.at(pos) == s[pos]);
29        assert(cs.at(pos) == cs[pos]);
30        assert(pos < cs.size());
31    }
32    catch (std::out_of_range&)
33    {
34        assert(pos >= s.size());
35    }
36}
37
38int main()
39{
40    {
41    typedef std::string S;
42    test(S(), 0);
43    test(S("123"), 0);
44    test(S("123"), 1);
45    test(S("123"), 2);
46    test(S("123"), 3);
47    }
48#if __cplusplus >= 201103L
49    {
50    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
51    test(S(), 0);
52    test(S("123"), 0);
53    test(S("123"), 1);
54    test(S("123"), 2);
55    test(S("123"), 3);
56    }
57#endif
58}
59