libstdc++-v3/testsuite/27_io/basic_ostream/inserters_other/char/5.cc

   1 // 2003-09-22  Petur Runolfsson  <peturr02@ru.is>
   2
   3 // Copyright (C) 2003-2018 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 // 27.6.2.5.3 basic_ostream manipulator inserters
  21 //
  22 // _GLIBCXX_RESOLVE_LIB_DEFECTS
  23 // DR 60. What is a formatted input function?
  24 // Inserters for manipulators do not behave as formatted output functions.
  25
  26 #include <ostream>
  27 #include <stdexcept>
  28 #include <testsuite_hooks.h>
  29 #include <testsuite_io.h>
  30
  31 std::ostream& func1(std::ostream&)
  32 { throw std::runtime_error(""); }
  33
  34 std::ios& func2(std::ios&)
  35 { throw std::runtime_error(""); }
  36
  37 std::ios_base& func3(std::ios_base&)
  38 { throw std::runtime_error(""); }
  39
  40 template<typename T>
  41 void test(T& (*f)(T&))
  42 {
  43   __gnu_test::sync_streambuf buf;
  44   std::ostream os(&buf);
  45
  46   __gnu_test::sync_streambuf buf_tie;
  47   std::ostream os_tie(&buf_tie);
  48
  49   // No sentry should be constructed so os.tie()->flush() should not be
  50   // called.
  51   os.tie(&os_tie);
  52
  53   try
  54     {
  55       os << f;
  56       // Exceptions thrown by f should not be caught
  57       VERIFY( false );
  58     }
  59   catch (std::runtime_error&)
  60     {
  61     }
  62
  63   // Exceptions thrown by f should not cause badbit to be set
  64   VERIFY( os.good() );
  65   VERIFY( !buf_tie.sync_called() );
  66
  67   // The manipulator should be called even if !os.good().
  68   os.setstate(std::ios_base::eofbit);
  69
  70   try
  71     {
  72       os << f;
  73       // Exceptions thrown by f should not be caught
  74       VERIFY( false );
  75     }
  76   catch (std::runtime_error&)
  77     {
  78     }
  79
  80   // Exceptions thrown by f should not cause badbit to be set
  81   VERIFY( os.rdstate() == std::ios_base::eofbit );
  82   VERIFY( !buf_tie.sync_called() );
  83 }
  84
  85 void test05()
  86 {
  87   test(&func1);
  88   test(&func2);
  89   test(&func3);
  90 }
  91
  92 int main()
  93 {
  94   test05();
  95   return 0;
  96 }