libcxx/test/std/input.output/file.streams/fstreams/fstream.assign/move_assign.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 // <fstream>
  10
  11 // template <class charT, class traits = char_traits<charT> >
  12 // class basic_fstream
  13
  14 // basic_fstream& operator=(basic_fstream&& rhs);
  15
  16 #include <fstream>
  17 #include <cassert>
  18 #include "test_macros.h"
  19 #include "platform_support.h"
  20
  21 int main(int, char**)
  22 {
  23     std::string temp = get_temp_file_name();
  24     {
  25         std::fstream fso(temp.c_str(), std::ios_base::in | std::ios_base::out
  26                                                  | std::ios_base::trunc);
  27         std::fstream fs;
  28         fs = std::move(fso);
  29         double x = 0;
  30         fs << 3.25;
  31         fs.seekg(0);
  32         fs >> x;
  33         assert(x == 3.25);
  34     }
  35     std::remove(temp.c_str());
  36
  37 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  38     {
  39         std::wfstream fso(temp.c_str(), std::ios_base::in | std::ios_base::out
  40                                                   | std::ios_base::trunc);
  41         std::wfstream fs;
  42         fs = std::move(fso);
  43         double x = 0;
  44         fs << 3.25;
  45         fs.seekg(0);
  46         fs >> x;
  47         assert(x == 3.25);
  48     }
  49     std::remove(temp.c_str());
  50 #endif
  51
  52   return 0;
  53 }