1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <string>
10 
11 // const_iterator cbegin() const;
12 
13 #include <string>
14 #include <cassert>
15 
16 #include "test_macros.h"
17 #include "min_allocator.h"
18 
19 template <class S>
20 void
21 test(const S& s)
22 {
23     typename S::const_iterator cb = s.cbegin();
24     if (!s.empty())
25     {
26         assert(*cb == s[0]);
27     }
28     assert(cb == s.begin());
29 }
30 
31 int main(int, char**)
32 {
33     {
34     typedef std::string S;
35     test(S());
36     test(S("123"));
37     }
38 #if TEST_STD_VER >= 11
39     {
40     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
41     test(S());
42     test(S("123"));
43     }
44 #endif
45 
46   return 0;
47 }
48