libstdc++-v3/testsuite/27_io/ios_base/callbacks/1.cc

   1 // 1999-11-10 bkoz
   2
   3 // Copyright (C) 1999-2021 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 // 27.4.2.6 ios_base callbacks
  21
  22 #include <string>
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 const std::string str01("the nubians of plutonia");
  27 std::string str02;
  28
  29 void
  30 callb01(std::ios_base::event,  std::ios_base&, int)
  31 { str02 += "the nubians"; }
  32
  33 void
  34 callb02(std::ios_base::event,  std::ios_base&, int)
  35 { str02 += " of "; }
  36
  37 void
  38 callb03(std::ios_base::event,  std::ios_base&, int)
  39 { str02 += "plutonia"; }
  40
  41 void test01()
  42 {
  43   std::locale loc("C");
  44   std::stringbuf        strbuf01;
  45   std::ios              ios01(&strbuf01);
  46
  47   ios01.register_callback(callb03, 1);
  48   ios01.register_callback(callb02, 1);
  49   ios01.register_callback(callb01, 1);
  50   ios01.imbue(loc);
  51   VERIFY( str01 == str02 );
  52 }
  53
  54
  55 int main(void)
  56 {
  57   test01();
  58   return 0;
  59 }
  60