libcxx/test/std/input.output/iostream.format/std.manip/setw.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 // T6 setw(int n);
  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::setw(10);
  33         assert(is.width() == 10);
  34     }
  35     {
  36         testbuf<char> sb;
  37         std::ostream os(&sb);
  38         os << std::setw(10);
  39         assert(os.width() == 10);
  40     }
  41     {
  42         testbuf<wchar_t> sb;
  43         std::wistream is(&sb);
  44         is >> std::setw(10);
  45         assert(is.width() == 10);
  46     }
  47     {
  48         testbuf<wchar_t> sb;
  49         std::wostream os(&sb);
  50         os << std::setw(10);
  51         assert(os.width() == 10);
  52     }
  53
  54   return 0;
  55 }