libstdc++-v3/testsuite/27_io/basic_ostringstream/cons/move.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2014-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 27.8.4.1 basic_ostringstream constructors [ostringstream.cons]
  21
  22 #include <sstream>
  23 #include <string>
  24 #include <testsuite_hooks.h>
  25
  26 const std::string strings[] = {
  27   "one could carry out the description of a machine, ",
  28   "no matter how complicated, ",
  29   "in characters which would be merely the letters of the alphabet, and so ",
  30   "provide the mind with a method of knowing the machine and all its parts"
  31 };
  32
  33 void
  34 append(std::ostringstream& ss, std::string& s, const std::string& t)
  35 {
  36   ss << t;
  37   s += t;
  38 }
  39
  40 void
  41 test01()
  42 {
  43   std::string exp;
  44   std::ostringstream s1;
  45   append(s1, exp, strings[0]);
  46
  47   std::ostringstream s2 = std::move(s1);
  48   VERIFY( s2.good() );
  49   VERIFY( s2.rdbuf() != nullptr );
  50   VERIFY( s2.str() == exp );
  51   append(s2, exp, strings[1]);
  52   VERIFY( s2.str() == exp );
  53
  54   std::ostringstream s3 = std::move(s2);
  55   VERIFY( s3.good() );
  56   VERIFY( s3.rdbuf() != nullptr );
  57   VERIFY( s3.str() == exp );
  58   append(s3, exp, strings[2]);
  59   VERIFY( s3.str() == exp );
  60
  61   s1.str("");
  62   s1.clear();
  63   exp.clear();
  64   append(s1, exp, strings[3]);
  65   VERIFY( s1.str() == exp );
  66 }
  67
  68 void
  69 test02()
  70 {
  71 #ifdef _GLIBCXX_USE_WCHAR_T
  72   std::wostringstream s1;
  73   std::wostringstream s2 = std::move(s1);
  74 #endif
  75 }
  76
  77 int
  78 main()
  79 {
  80   test01();
  81   test02();
  82 }