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 
main(int,char **)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 }
38