libcxx/test/std/input.output/iostreams.base/ios/iostate.flags/exceptions_iostate.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <ios>
  10
  11 // template <class charT, class traits> class basic_ios
  12
  13 // iostate exceptions() const;
  14
  15 #include <ios>
  16 #include <streambuf>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20
  21 struct testbuf : public std::streambuf {};
  22
  23 int main(int, char**)
  24 {
  25     {
  26         std::ios ios(0);
  27         assert(ios.exceptions() == std::ios::goodbit);
  28         ios.exceptions(std::ios::eofbit);
  29         assert(ios.exceptions() == std::ios::eofbit);
  30 #ifndef TEST_HAS_NO_EXCEPTIONS
  31         try
  32         {
  33             ios.exceptions(std::ios::badbit);
  34             assert(false);
  35         }
  36         catch (std::ios::failure&)
  37         {
  38         }
  39         assert(ios.exceptions() == std::ios::badbit);
  40 #endif
  41     }
  42     {
  43         testbuf sb;
  44         std::ios ios(&sb);
  45         assert(ios.exceptions() == std::ios::goodbit);
  46         ios.exceptions(std::ios::eofbit);
  47         assert(ios.exceptions() == std::ios::eofbit);
  48         ios.exceptions(std::ios::badbit);
  49         assert(ios.exceptions() == std::ios::badbit);
  50     }
  51
  52   return 0;
  53 }