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

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2014-2023 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 // 27.8.3.2 Assign and swap [istringstream.assign]
  21
  22 #include <sstream>
  23 #include <string>
  24 #include <testsuite_hooks.h>
  25
  26 void
  27 test01()
  28 {
  29   std::istringstream s1("absence of a signal");
  30   std::string s;
  31   s1 >> s;
  32
  33   std::istringstream s2;
  34   s2 = std::move(s1);
  35   s2 >> s;
  36   VERIFY(s == "of");
  37
  38   std::istringstream s3;
  39   s3.swap(s2);
  40   s3 >> s;
  41   VERIFY(s == "a");
  42
  43   swap(s1, s3);
  44   s1 >> s;
  45   VERIFY(s == "signal");
  46
  47   s2.str("should never be used as a signal");
  48   s1 = std::move(s2);
  49   getline(s1, s);
  50   VERIFY(s == "should never be used as a signal");
  51   s3 = std::move(s1);
  52   VERIFY(s3.eof());
  53 }
  54
  55 void test02()
  56 {
  57   std::istringstream s0{ " 1234.5 " };
  58   std::istringstream s;
  59   s = std::move(s0);
  60   char c{};
  61   s >> c;
  62   VERIFY( c == '1' );
  63   int i{};
  64   s >> i;
  65   VERIFY( i == 234 );
  66   double d{};
  67   s >> d;
  68   VERIFY( d == .5 );
  69 }
  70
  71 void test03()
  72 {
  73 #ifdef _GLIBCXX_USE_WCHAR_T
  74   std::wistringstream s0{ L" 1234.5 " };
  75   std::wistringstream s;
  76   s = std::move(s0);
  77   s.swap(s0);
  78   swap(s, s0);
  79   wchar_t c{};
  80   s >> c;
  81   VERIFY( c == L'1' );
  82   int i{};
  83   s >> i;
  84   VERIFY( i == 234 );
  85   double d{};
  86   s >> d;
  87   VERIFY( d == .5 );
  88 #endif
  89 }
  90
  91 int
  92 main()
  93 {
  94   test01();
  95   test02();
  96   test03();
  97 }