libcxx/test/std/input.output/iostream.format/std.manip/setbase.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 // T3 setbase(int base);
  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         is >> std::setbase(8);
  33         assert((is.flags() & std::ios_base::basefield) == std::ios_base::oct);
  34         is >> std::setbase(10);
  35         assert((is.flags() & std::ios_base::basefield) == std::ios_base::dec);
  36         is >> std::setbase(16);
  37         assert((is.flags() & std::ios_base::basefield) == std::ios_base::hex);
  38         is >> std::setbase(15);
  39         assert((is.flags() & std::ios_base::basefield) == 0);
  40     }
  41     {
  42         testbuf<char> sb;
  43         std::ostream os(&sb);
  44         os << std::setbase(8);
  45         assert((os.flags() & std::ios_base::basefield) == std::ios_base::oct);
  46         os << std::setbase(10);
  47         assert((os.flags() & std::ios_base::basefield) == std::ios_base::dec);
  48         os << std::setbase(16);
  49         assert((os.flags() & std::ios_base::basefield) == std::ios_base::hex);
  50         os << std::setbase(15);
  51         assert((os.flags() & std::ios_base::basefield) == 0);
  52     }
  53 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  54     {
  55         testbuf<wchar_t> sb;
  56         std::wistream is(&sb);
  57         is >> std::setbase(8);
  58         assert((is.flags() & std::ios_base::basefield) == std::ios_base::oct);
  59         is >> std::setbase(10);
  60         assert((is.flags() & std::ios_base::basefield) == std::ios_base::dec);
  61         is >> std::setbase(16);
  62         assert((is.flags() & std::ios_base::basefield) == std::ios_base::hex);
  63         is >> std::setbase(15);
  64         assert((is.flags() & std::ios_base::basefield) == 0);
  65     }
  66     {
  67         testbuf<wchar_t> sb;
  68         std::wostream os(&sb);
  69         os << std::setbase(8);
  70         assert((os.flags() & std::ios_base::basefield) == std::ios_base::oct);
  71         os << std::setbase(10);
  72         assert((os.flags() & std::ios_base::basefield) == std::ios_base::dec);
  73         os << std::setbase(16);
  74         assert((os.flags() & std::ios_base::basefield) == std::ios_base::hex);
  75         os << std::setbase(15);
  76         assert((os.flags() & std::ios_base::basefield) == 0);
  77     }
  78 #endif // TEST_HAS_NO_WIDE_CHARACTERS
  79
  80   return 0;
  81 }