libstdc++-v3/testsuite/27_io/basic_stringstream/str/char/5.cc

   1 // Copyright (C) 2020-2023 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 // 29.8.5.4  basic_stringstream member functions  [stringstream.members]
  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 <testsuite_hooks.h>
  26 #include <testsuite_allocator.h>
  27
  28 void test01()
  29 {
  30   const std::string s0 = "this is not a short string";
  31   std::stringstream ss;
  32   ss.str(s0);
  33   VERIFY( ss.str() == s0 );
  34   VERIFY( ss.str() == s0 );
  35
  36   using Alloc = __gnu_test::uneq_allocator<char>;
  37   const Alloc a1(1);
  38   std::basic_string<char, std::char_traits<char>, Alloc> s1 = ss.str(a1);
  39   VERIFY( s1.get_allocator() == a1 );
  40   VERIFY( ss.str(a1).get_allocator() == a1 );
  41   VERIFY( ss.str(a1) == s1 );
  42   VERIFY( std::move(ss).str(a1) == s1 );
  43   VERIFY( std::move(ss).str(a1) == s1 );
  44
  45   const Alloc a2(2);
  46   VERIFY( ss.str(a2).get_allocator() == a2 );
  47   VERIFY( ss.str(a2) == s1 );
  48
  49   VERIFY( std::move(ss).str() == s0 );
  50   VERIFY( std::move(ss).str().empty() );
  51   VERIFY( ss.str().empty() );
  52   VERIFY( ss.str(a1).empty() );
  53 }
  54
  55 void test02()
  56 {
  57   std::stringstream ss("123");
  58   std::string str = "ABCDEF";
  59   ss << str;
  60   VERIFY( ss.str() == str );
  61   VERIFY( std::move(ss).str() == str );
  62   VERIFY( std::move(ss).str().empty() );
  63 }
  64
  65 void test03()
  66 {
  67   std::stringstream ss;
  68   using Alloc = __gnu_test::tracker_allocator<char>;
  69   using Str = std::basic_string<char, std::char_traits<char>, Alloc>;
  70   Str s1 = "string that is not short, quite long even";
  71   auto count1 = __gnu_test::tracker_allocator_counter::get_allocation_count();
  72   ss.str(s1);
  73   auto count2 = __gnu_test::tracker_allocator_counter::get_allocation_count();
  74   VERIFY( count1 == count2 );
  75   VERIFY( ss.str() == s1.c_str() );
  76 }
  77
  78 void test04()
  79 {
  80   std::stringstream ss;
  81   const std::string str = "Another quite long string, not at all short";
  82   std::string str2 = str;
  83   ss.str(std::move(str2));
  84   VERIFY( str2.empty() );
  85   VERIFY( ss.str() == str );
  86 }
  87
  88 int main()
  89 {
  90   test01();
  91   test02();
  92   test03();
  93   test04();
  94 }