libcxx/test/std/localization/locale.stdcvt/codecvt_utf8_unshift.pass.cpp

   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 #include "test_macros.h"
  27
  28 int main(int, char**)
  29 {
  30     {
  31         typedef std::codecvt_utf8<wchar_t> C;
  32         C c;
  33         char n[4] = {0};
  34         std::mbstate_t m;
  35         char* np = nullptr;
  36         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
  37         assert(r == std::codecvt_base::noconv);
  38     }
  39     {
  40         typedef std::codecvt_utf8<char16_t> C;
  41         C c;
  42         char n[4] = {0};
  43         std::mbstate_t m;
  44         char* np = nullptr;
  45         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
  46         assert(r == std::codecvt_base::noconv);
  47     }
  48     {
  49         typedef std::codecvt_utf8<char32_t> C;
  50         C c;
  51         char n[4] = {0};
  52         std::mbstate_t m;
  53         char* np = nullptr;
  54         std::codecvt_base::result r = c.unshift(m, n, n+4, np);
  55         assert(r == std::codecvt_base::noconv);
  56     }
  57
  58   return 0;
  59 }