libstdc++-v3/testsuite/22_locale/conversions/buffer/1.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2015-2023 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 // 22.3.3.2.3  Buffer conversions
  21
  22 #include <locale>
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_common_types.h>
  26
  27 template<typename Elem>
  28 struct cvt : std::codecvt<Elem, char, std::mbstate_t> { };
  29
  30 template<typename Elem>
  31 using buf_conv = std::wbuffer_convert<cvt<Elem>, Elem>;
  32
  33 using std::string;
  34 using std::wstring;
  35
  36 void test01()
  37 {
  38 #ifdef _GLIBCXX_USE_WCHAR_T
  39   buf_conv<wchar_t> buf;
  40   std::stringbuf sbuf;
  41   VERIFY( buf.rdbuf() == nullptr );
  42   VERIFY( buf.rdbuf(&sbuf) == nullptr );
  43   VERIFY( buf.rdbuf() == &sbuf );
  44   VERIFY( buf.rdbuf(nullptr) == &sbuf );
  45
  46   __gnu_test::implicitly_default_constructible test;
  47   test.operator()<buf_conv<wchar_t>>(); // P0935R0
  48 #endif
  49 }
  50
  51 void test02()
  52 {
  53   std::stringbuf sbuf;
  54   buf_conv<char> buf(&sbuf);  // noconv
  55
  56   std::stringstream ss;
  57   ss.std::ios::rdbuf(&buf);
  58   string input = "King for a day...";
  59   ss << input << std::flush;
  60   string output = sbuf.str();
  61   VERIFY( input == output );
  62 }
  63
  64 void test03()
  65 {
  66 #ifdef _GLIBCXX_USE_WCHAR_T
  67   std::stringbuf sbuf;
  68   buf_conv<wchar_t> buf(&sbuf);
  69
  70   std::wstringstream ss;
  71   ss.std::wios::rdbuf(&buf);
  72   wstring input = L"Fool for a lifetime";
  73   ss << input << std::flush;
  74   string output = sbuf.str();
  75   VERIFY( output == "Fool for a lifetime" );
  76 #endif
  77 }
  78
  79 int main()
  80 {
  81   test01();
  82   test02();
  83   test03();
  84 }