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 // <codecvt>
10 
11 // template <class Elem, unsigned long Maxcode = 0x10ffff,
12 //           codecvt_mode Mode = (codecvt_mode)0>
13 // class codecvt_utf8_utf16
14 //     : public codecvt<Elem, char, mbstate_t>
15 // {
16 //     // unspecified
17 // };
18 
19 // result
20 //     unshift(stateT& state,
21 //             externT* to, externT* to_end, externT*& to_next) const;
22 
23 #include <codecvt>
24 #include <cassert>
25 
26 #include "test_macros.h"
27 
28 int main(int, char**)
29 {
30 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
31     {
32         typedef std::codecvt_utf8_utf16<wchar_t> C;
33         C c;
34         char n[4] = {0};
35         std::mbstate_t m;
36         char* np = nullptr;
37         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
38         assert(r == std::codecvt_base::noconv);
39     }
40 #endif
41     {
42         typedef std::codecvt_utf8_utf16<char16_t> C;
43         C c;
44         char n[4] = {0};
45         std::mbstate_t m;
46         char* np = nullptr;
47         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
48         assert(r == std::codecvt_base::noconv);
49     }
50     {
51         typedef std::codecvt_utf8_utf16<char32_t> C;
52         C c;
53         char n[4] = {0};
54         std::mbstate_t m;
55         char* np = nullptr;
56         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
57         assert(r == std::codecvt_base::noconv);
58     }
59 
60   return 0;
61 }
62