libcxx/test/std/input.output/iostreams.base/ios/basic.ios.members/rdbuf_streambuf.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 // basic_streambuf<charT,traits>* rdbuf(basic_streambuf<charT,traits>* sb);
  14
  15 #include <ios>
  16 #include <streambuf>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20
  21 int main(int, char**)
  22 {
  23     std::ios ios(0);
  24     assert(ios.rdbuf() == 0);
  25     assert(!ios.good());
  26     std::streambuf* sb = (std::streambuf*)1;
  27     std::streambuf* sb2 = ios.rdbuf(sb);
  28     assert(sb2 == 0);
  29     assert(ios.rdbuf() == sb);
  30     assert(ios.good());
  31     sb2 = ios.rdbuf(0);
  32     assert(sb2 == (std::streambuf*)1);
  33     assert(ios.rdbuf() == 0);
  34     assert(ios.bad());
  35
  36   return 0;
  37 }