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
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 int main(int, char**)
27 {
28     {
29         typedef std::codecvt_utf8<wchar_t> C;
30         C c;
31         char n[4] = {0};
32         std::mbstate_t m;
33         char* np = nullptr;
34         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
35         assert(r == std::codecvt_base::noconv);
36     }
37     {
38         typedef std::codecvt_utf8<char16_t> C;
39         C c;
40         char n[4] = {0};
41         std::mbstate_t m;
42         char* np = nullptr;
43         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
44         assert(r == std::codecvt_base::noconv);
45     }
46     {
47         typedef std::codecvt_utf8<char32_t> C;
48         C c;
49         char n[4] = {0};
50         std::mbstate_t m;
51         char* np = nullptr;
52         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
53         assert(r == std::codecvt_base::noconv);
54     }
55 
56   return 0;
57 }
58