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 operator[](size_type pos) const;
13//       reference operator[](size_type pos);
14
15#ifdef _LIBCPP_DEBUG
16#define _LIBCPP_ASSERT(x, m) ((x) ? (void)0 : std::exit(0))
17#endif
18
19#include <string>
20#include <cassert>
21
22#include "min_allocator.h"
23
24int main()
25{
26    {
27    typedef std::string S;
28    S s("0123456789");
29    const S& cs = s;
30    for (S::size_type i = 0; i < cs.size(); ++i)
31    {
32        assert(s[i] == '0' + i);
33        assert(cs[i] == s[i]);
34    }
35    assert(cs[cs.size()] == '\0');
36    const S s2 = S();
37    assert(s2[0] == '\0');
38    }
39#if __cplusplus >= 201103L
40    {
41    typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
42    S s("0123456789");
43    const S& cs = s;
44    for (S::size_type i = 0; i < cs.size(); ++i)
45    {
46        assert(s[i] == '0' + i);
47        assert(cs[i] == s[i]);
48    }
49    assert(cs[cs.size()] == '\0');
50    const S s2 = S();
51    assert(s2[0] == '\0');
52    }
53#endif
54#ifdef _LIBCPP_DEBUG
55    {
56        std::string s;
57        char c = s[0];
58        assert(c == '\0');
59        c = s[1];
60        assert(false);
61    }
62#endif
63}
64