1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <iostream>
11 
12 // istream cerr;
13 
14 #include <iostream>
15 #include <cassert>
16 
main()17 int main()
18 {
19 #if 0
20     std::cerr << "Hello World!\n";
21 #else
22     assert(std::cerr.tie() == &std::cout);
23     assert(std::cerr.flags() & std::ios_base::unitbuf);
24 #endif  // 0
25 }
26