libcxx/test/std/input.output/iostream.format/std.manip/setiosflags.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 // <iomanip>
  10
  11 // T2 setiosflags (ios_base::fmtflags mask);
  12
  13 #include <iomanip>
  14 #include <istream>
  15 #include <ostream>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 template <class CharT>
  21 struct testbuf
  22     : public std::basic_streambuf<CharT>
  23 {
  24     testbuf() {}
  25 };
  26
  27 int main(int, char**)
  28 {
  29     {
  30         testbuf<char> sb;
  31         std::istream is(&sb);
  32         assert(!(is.flags() & std::ios_base::oct));
  33         is >> std::setiosflags(std::ios_base::oct);
  34         assert(is.flags() & std::ios_base::oct);
  35     }
  36     {
  37         testbuf<char> sb;
  38         std::ostream os(&sb);
  39         assert(!(os.flags() & std::ios_base::oct));
  40         os << std::setiosflags(std::ios_base::oct);
  41         assert(os.flags() & std::ios_base::oct);
  42     }
  43 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  44     {
  45         testbuf<wchar_t> sb;
  46         std::wistream is(&sb);
  47         assert(!(is.flags() & std::ios_base::oct));
  48         is >> std::setiosflags(std::ios_base::oct);
  49         assert(is.flags() & std::ios_base::oct);
  50     }
  51     {
  52         testbuf<wchar_t> sb;
  53         std::wostream os(&sb);
  54         assert(!(os.flags() & std::ios_base::oct));
  55         os << std::setiosflags(std::ios_base::oct);
  56         assert(os.flags() & std::ios_base::oct);
  57     }
  58 #endif
  59
  60   return 0;
  61 }