libstdc++-v3/testsuite/27_io/basic_ostringstream/cons/char/1.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 // C++20 29.8.4.2  basic_ostringstream constructors  [ostringstream.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::ostringstream::allocator_type a;
  33   std::ostringstream stm(std::ios_base::in, a);
  34 }
  35
  36 auto const cstr = "This is a test string";
  37
  38 void
  39 test02()
  40 {
  41   std::string s1(cstr);
  42   std::ostringstream stm(std::move(s1));
  43   VERIFY( s1.empty() );
  44
  45   std::string s2(cstr);
  46   VERIFY( stm.str() == s2 );
  47 }
  48
  49 void
  50 test03()
  51 {
  52   using C = char;
  53   using alloc_type = __gnu_test::uneq_allocator<C>;
  54   using traits_type = std::char_traits<C>;
  55   using string = std::basic_string<C, traits_type, alloc_type>;
  56   using ostringstream = std::basic_ostringstream<C, traits_type, alloc_type>;
  57
  58   auto const mode = std::ios_base::in;
  59   alloc_type a1(1);
  60   const string s1(cstr, a1);
  61
  62   // basic_ostringstream()
  63   {
  64     alloc_type a0;
  65     ostringstream ss;
  66     VERIFY( ss.str().empty() );
  67     VERIFY( ss.rdbuf()->get_allocator() == a0 );
  68     VERIFY( ss.str().get_allocator() == a0 );
  69   }
  70
  71   // basic_ostringstream(openmode)
  72   {
  73     alloc_type a0;
  74     ostringstream ss(mode);
  75     VERIFY( ss.str().empty() );
  76     VERIFY( ss.rdbuf()->get_allocator() == a0 );
  77     VERIFY( ss.str().get_allocator() == a0 );
  78   }
  79
  80   // basic_ostringstream(const basic_string<C,T,A>&, openmode = in)
  81   {
  82     ostringstream ss(s1);
  83     VERIFY( ss.str() == cstr );
  84     VERIFY( ss.rdbuf()->get_allocator() == a1 );
  85     VERIFY( ss.str().get_allocator() == a1 );
  86   }
  87
  88   // basic_ostringstream(const basic_string<C,T,A>&, openmode = in)
  89   {
  90     ostringstream ss(s1, mode);
  91     VERIFY( ss.str() == cstr );
  92     VERIFY( ss.rdbuf()->get_allocator() == a1 );
  93     VERIFY( ss.str().get_allocator() == a1 );
  94   }
  95
  96   // basic_ostringstream(openmode, const A&)
  97   {
  98     ostringstream ss(mode, a1);
  99     VERIFY( ss.str().empty() );
 100     VERIFY( ss.rdbuf()->get_allocator() == a1 );
 101     VERIFY( ss.str().get_allocator() == a1 );
 102   }
 103
 104   // basic_ostringstream(basic_string<C,T,A>&&, openmode = in)
 105   {
 106     ostringstream ss(string{s1});
 107     VERIFY( ss.str() == s1 );
 108     VERIFY( ss.rdbuf()->get_allocator() == a1 );
 109     VERIFY( ss.str().get_allocator() == a1 );
 110   }
 111
 112   // basic_ostringstream(basic_string<C,T,A>&&, openmode = in)
 113   {
 114     ostringstream ss(string(s1), mode);
 115     VERIFY( ss.str() == s1 );
 116     VERIFY( ss.rdbuf()->get_allocator() == a1 );
 117     VERIFY( ss.str().get_allocator() == a1 );
 118   }
 119
 120   // basic_ostringstream(const basic_string<C,T,SA>&, const A&)
 121   {
 122     alloc_type a2(2);
 123     ostringstream ss(s1, a2);
 124     VERIFY( ss.str() == s1 );
 125     VERIFY( ss.rdbuf()->get_allocator() == a2 );
 126     VERIFY( ss.str().get_allocator() == a2 );
 127   }
 128
 129   // basic_ostringstream(const basic_string<C,T,SA>&, const A&)
 130   {
 131     alloc_type a2(2);
 132     const std::string s2 = cstr;
 133     ostringstream ss(s2, a2);
 134     VERIFY( ss.str() == cstr );
 135     VERIFY( ss.rdbuf()->get_allocator() == a2 );
 136     VERIFY( ss.str().get_allocator() == a2 );
 137   }
 138
 139   // basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)
 140   {
 141     alloc_type a2(2);
 142     ostringstream ss(s1, mode, a2);
 143     VERIFY( ss.str() == s1 );
 144     VERIFY( ss.rdbuf()->get_allocator() == a2 );
 145     VERIFY( ss.str().get_allocator() == a2 );
 146   }
 147
 148   // basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)
 149   {
 150     alloc_type a2(2);
 151     const std::string s2 = cstr;
 152     ostringstream ss(s2, mode, a2);
 153     VERIFY( ss.str() == cstr );
 154     VERIFY( ss.rdbuf()->get_allocator() == a2 );
 155     VERIFY( ss.str().get_allocator() == a2 );
 156   }
 157
 158   // basic_ostringstream(const basic_string<C,T,SA>&, openmode = in)
 159   {
 160     alloc_type a0;
 161     const std::string s2 = cstr;
 162     ostringstream ss(s2, mode);
 163     VERIFY( ss.str() == cstr );
 164     VERIFY( ss.rdbuf()->get_allocator() == a0 );
 165     VERIFY( ss.str().get_allocator() == a0 );
 166   }
 167 }
 168
 169 // A minimal allocator with no default constructor
 170 template<typename T>
 171   struct NoDefaultCons : __gnu_test::SimpleAllocator<T>
 172   {
 173     using __gnu_test::SimpleAllocator<T>::SimpleAllocator;
 174
 175     NoDefaultCons() = delete;
 176
 177     NoDefaultCons(int) { }
 178   };
 179
 180 void
 181 test04()
 182 {
 183   using sstream = std::basic_ostringstream<char, std::char_traits<char>,
 184                                            NoDefaultCons<char>>;
 185
 186   NoDefaultCons<char> a(1);
 187   const std::string str(cstr);
 188
 189   sstream ss1(str, a);
 190   VERIFY( ss1.str() == cstr );
 191
 192   sstream ss2(str, std::ios::in, a);
 193   VERIFY( ss2.str() == cstr );
 194   VERIFY( bool(ss2 << "That") );
 195   VERIFY( ss2.str() == "That is a test string" );
 196
 197   sstream ss3(std::string(str), std::ios::ate, a);
 198   VERIFY( ss3.str() == cstr );
 199   VERIFY( bool(ss3 << "y thing") );
 200   VERIFY( ss3.str() == "This is a test stringy thing" );
 201 }
 202
 203 int
 204 main()
 205 {
 206   test01();
 207   test02();
 208   test03();
 209   test04();
 210 }