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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2014-2019 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 // 27.8.5.2 Assign and swap [stringstream.assign]
  21
  22 #include <sstream>
  23 #include <string>
  24 #include <testsuite_hooks.h>
  25
  26 void
  27 test01()
  28 {
  29   std::stringstream s1;
  30   s1 << "absence of a signal";
  31   std::string s;
  32   s1 >> s;
  33
  34   std::stringstream s2;
  35   s2 = std::move(s1);
  36   s2 >> s;
  37   VERIFY(s == "of");
  38
  39   std::stringstream s3;
  40   s3.swap(s2);
  41   s3 >> s;
  42   VERIFY(s == "a");
  43
  44   swap(s1, s3);
  45   s1 >> s;
  46   VERIFY(s == "signal");
  47
  48   s2 << "should never be used as a signal";
  49   s1 = std::move(s2);
  50   getline(s1, s);
  51   VERIFY(s == "should never be used as a signal");
  52   s3 = std::move(s1);
  53   VERIFY(s3.eof());
  54 }
  55
  56 void test02()
  57 {
  58   std::stringstream s0;
  59   s0 << " 1234.5 ";
  60   std::stringstream s;
  61   s = std::move(s0);
  62   char c{};
  63   s >> c;
  64   VERIFY( c == '1' );
  65   int i{};
  66   s >> i;
  67   VERIFY( i == 234 );
  68   double d{};
  69   s >> d;
  70   VERIFY( d == .5 );
  71 }
  72
  73 void test03()
  74 {
  75 #ifdef _GLIBCXX_USE_WCHAR_T
  76   std::wstringstream s0;
  77   s0 << L" 1234.5 ";
  78   std::wstringstream s;
  79   s = std::move(s0);
  80   s.swap(s0);
  81   swap(s, s0);
  82   wchar_t c{};
  83   s >> c;
  84   VERIFY( c == L'1' );
  85   int i{};
  86   s >> i;
  87   VERIFY( i == 234 );
  88   double d{};
  89   s >> d;
  90   VERIFY( d == .5 );
  91 #endif
  92 }
  93
  94 int
  95 main()
  96 {
  97   test01();
  98   test02();
  99   test03();
 100 }