libstdc++-v3/testsuite/27_io/basic_ostream/emit/1.cc

   1 // Copyright (C) 2020-2022 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 // { dg-options "-std=gnu++2a" }
  19 // { dg-additional-options "-pthread" { target pthread } }
  20 // { dg-do run { target c++2a } }
  21 // { dg-require-effective-target cxx11_abi }
  22 // { dg-xfail-run-if "cannot catch forced_unwind" { *-*-* } { "-fno-rtti" } }
  23
  24 #include <syncstream>
  25 #include <testsuite_hooks.h>
  26
  27 void
  28 test01()
  29 {
  30   std::stringbuf sb;
  31   std::osyncstream s(&sb);
  32   s << "abc" << std::emit_on_flush << "def" << std::flush << "ghi"
  33     << std::emit_on_flush << std::noemit_on_flush << std::endl;
  34   VERIFY( sb.view() == "abcdef" );
  35   s << "jkl" << std::flush_emit << "mno" << std::flush;
  36   VERIFY( sb.view() == "abcdefghi\njkl" );
  37   s.emit();
  38   VERIFY( sb.view() == "abcdefghi\njklmno" );
  39 }
  40
  41 int
  42 main()
  43 {
  44   test01();
  45 }