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

   1 // Copyright (C) 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 // C++20 29.8.2.2  basic_stringbuf constructors  [stringbuf.cons
  19
  20 // { dg-options "-std=gnu++2a" }
  21 // { dg-do run { target c++2a } }
  22 // { dg-require-effective-target cxx11-abi }
  23
  24 #include <sstream>
  25 #include <string>
  26 #include <testsuite_allocator.h>
  27 #include <testsuite_hooks.h>
  28
  29 void
  30 test01()
  31 {
  32   std::wistringstream::allocator_type a;
  33   std::wistringstream stm(std::ios_base::in, a);
  34 }
  35
  36 auto const cstr = L"This is a test";
  37
  38 void
  39 test02()
  40 {
  41   std::wstring s1(cstr);
  42   std::wistringstream stm(std::move(s1));
  43   VERIFY( s1.empty() );
  44
  45   std::wstring s2(cstr);
  46   VERIFY( stm.str() == s2 );
  47 }
  48
  49 void
  50 test03()
  51 {
  52   using alloc_type = __gnu_test::tracker_allocator<wchar_t>;
  53   using str_type = std::basic_string<wchar_t, std::char_traits<wchar_t>, alloc_type>;
  54
  55   auto const mode = std::ios_base::in;
  56   str_type s1(cstr);
  57
  58   {
  59     std::wistringstream::allocator_type a;
  60     std::wistringstream sbuf(s1, mode, a);
  61     std::wstring s2(cstr);
  62     VERIFY( sbuf.str() == s2 );
  63   }
  64
  65   {
  66     std::wistringstream sbuf(s1, mode);
  67     std::wstring s2(cstr);
  68     VERIFY( sbuf.str() == s2 );
  69   }
  70
  71   {
  72     std::wistringstream sbuf(s1);
  73     std::wstring s2(cstr);
  74     VERIFY( sbuf.str() == s2 );
  75   }
  76 }
  77
  78 int
  79 main()
  80 {
  81   test01();
  82   test02();
  83   test03();
  84   return 0;
  85 }