libstdc++-v3/testsuite/27_io/basic_stringbuf/str/wchar_t/4.cc

   1 // Copyright (C) 2020-2024 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 // 29.8.2.4  basic_stringbuf member functions  [stringbuf.members]
  19
  20 // { dg-do run { target c++20 } }
  21 // { dg-require-effective-target cxx11_abi }
  22
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_allocator.h>
  26
  27 void test01()
  28 {
  29   const std::wstring s0 = L"this is not a short string";
  30   std::wstringbuf sb;
  31   sb.str(s0);
  32   VERIFY( sb.str() == s0 );
  33   VERIFY( sb.str() == s0 );
  34
  35   using Alloc = __gnu_test::uneq_allocator<wchar_t>;
  36   const Alloc a1(1);
  37   std::basic_string<wchar_t, std::char_traits<wchar_t>, Alloc> s1 = sb.str(a1);
  38   VERIFY( s1.get_allocator() == a1 );
  39   VERIFY( sb.str(a1).get_allocator() == a1 );
  40   VERIFY( sb.str(a1) == s1 );
  41   VERIFY( std::move(sb).str(a1) == s1 );
  42   VERIFY( std::move(sb).str(a1) == s1 );
  43
  44   const Alloc a2(2);
  45   VERIFY( sb.str(a2).get_allocator() == a2 );
  46   VERIFY( sb.str(a2) == s1 );
  47
  48   VERIFY( std::move(sb).str() == s0 );
  49   VERIFY( std::move(sb).str().empty() );
  50   VERIFY( sb.str().empty() );
  51   VERIFY( sb.str(a1).empty() );
  52 }
  53
  54 void test02()
  55 {
  56   std::wstringbuf sb(L"123");
  57   std::wstring str = L"ABCDEF";
  58   sb.sputn(str.c_str(), str.size());
  59   VERIFY( sb.str() == str );
  60   VERIFY( std::move(sb).str() == str );
  61   VERIFY( std::move(sb).str().empty() );
  62 }
  63
  64 void test03()
  65 {
  66   std::wstringbuf sb;
  67   using Alloc = __gnu_test::tracker_allocator<wchar_t>;
  68   using Str = std::basic_string<wchar_t, std::char_traits<wchar_t>, Alloc>;
  69   Str s1 = L"string that is not short, quite long even";
  70   auto count1 = __gnu_test::tracker_allocator_counter::get_allocation_count();
  71   sb.str(s1);
  72   auto count2 = __gnu_test::tracker_allocator_counter::get_allocation_count();
  73   VERIFY( count1 == count2 );
  74   VERIFY( sb.str() == s1.c_str() );
  75 }
  76
  77 void test04()
  78 {
  79   std::wstringbuf sb;
  80   const std::wstring str = L"Another quite long string, not at all short";
  81   std::wstring str2 = str;
  82   sb.str(std::move(str2));
  83   VERIFY( str2.empty() );
  84   VERIFY( sb.str() == str );
  85 }
  86
  87 int main()
  88 {
  89   test01();
  90   test02();
  91   test03();
  92   test04();
  93 }