libstdc++-v3/testsuite/27_io/basic_ofstream/assign/1.cc

   1 // Copyright (C) 2014-2020 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++11 } }
  19 // { dg-require-fileio "" }
  20
  21 // 27.9.1.12 Assign and swap [ostringstream.assign]
  22
  23 #include <fstream>
  24 #include <string>
  25 #include <testsuite_hooks.h>
  26
  27 using namespace std;
  28
  29 string const name = "ofstream-assign.txt";
  30
  31 void
  32 test01()
  33 {
  34   string s1 = "Let the whole outside world";
  35   string s2 = " consist of a long paper tape.";
  36   ofstream f(name, ios::trunc);
  37   VERIFY( f.is_open() );
  38   f << s1;
  39   {
  40     ofstream f1;
  41     f1 = std::move(f);
  42     VERIFY( f1.is_open() );
  43     VERIFY( !f.is_open() );
  44     f1 << s2;
  45     f1.swap(f);
  46     VERIFY( !f1.is_open() );
  47     VERIFY( f.is_open() );
  48     f << s1;
  49     swap(f1, f);
  50     f1 << s2;
  51   }
  52   ifstream in(name);
  53   string result;
  54   getline(in, result);
  55   VERIFY( result == (s1 + s2 + s1 + s2) );
  56 }
  57
  58 void
  59 test02()
  60 {
  61 #ifdef _GLIBCXX_USE_WCHAR_T
  62   std::wofstream s0, s;
  63   s = std::move(s0);
  64   s.swap(s0);
  65   swap(s, s0);
  66 #endif
  67 }
  68
  69 int
  70 main()
  71 {
  72   test01();
  73   test02();
  74 }