libcxx/test/std/input.output/file.streams/fstreams/filebuf.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_filebuf
  13
  14 // basic_filebuf& operator=(basic_filebuf&& 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::filebuf f;
  26         assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
  27                                                | std::ios_base::trunc) != 0);
  28         assert(f.is_open());
  29         assert(f.sputn("123", 3) == 3);
  30         f.pubseekoff(1, std::ios_base::beg);
  31         assert(f.sgetc() == '2');
  32         std::filebuf f2;
  33         f2 = std::move(f);
  34         assert(!f.is_open());
  35         assert(f2.is_open());
  36         assert(f2.sgetc() == '2');
  37     }
  38     std::remove(temp.c_str());
  39
  40 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  41     {
  42         std::wfilebuf f;
  43         assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
  44                                                | std::ios_base::trunc) != 0);
  45         assert(f.is_open());
  46         assert(f.sputn(L"123", 3) == 3);
  47         f.pubseekoff(1, std::ios_base::beg);
  48         assert(f.sgetc() == L'2');
  49         std::wfilebuf f2;
  50         f2 = std::move(f);
  51         assert(!f.is_open());
  52         assert(f2.is_open());
  53         assert(f2.sgetc() == L'2');
  54     }
  55     std::remove(temp.c_str());
  56 #endif
  57
  58   return 0;
  59 }