text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  // <locale>
  
  // template <> class codecvt<char16_t, char, mbstate_t>
  
  // result in(stateT& state,
  //           const externT* from, const externT* from_end, const externT*& from_next,
  //           internT* to, internT* to_end, internT*& to_next) const;
  
  // This test runs in C++20, but we have deprecated codecvt<char(16|32), char, mbstate_t> in C++20.
  // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
  
  #include <locale>
  #include <string>
  #include <vector>
  #include <cassert>
  
  #include "test_macros.h"
  
  typedef std::codecvt<char16_t, char, std::mbstate_t> F;
  
  int main(int, char**)
  {
      std::locale l = std::locale::classic();
      const char from[] = "some text";
      F::intern_type to[9];
      const F& f = std::use_facet<F>(l);
      std::mbstate_t mbs = {};
      const char* from_next = 0;
      F::intern_type* to_next = 0;
      assert(f.in(mbs, from, from + 9, from_next,
                       to, to + 9, to_next) == F::ok);
      assert(from_next - from == 9);
      assert(to_next - to == 9);
      for (unsigned i = 0; i < 9; ++i)
          assert(to[i] == from[i]);
  
    return 0;
  }
  