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 // <iostream>
10 
11 // istream wcerr;
12 
13 // RUN: %{build}
14 // RUN: %{exec} %t.exe 2> %t.err
15 // RUN: grep -e 'Hello World!' %t.err
16 
17 #include <iostream>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
22 int main(int, char**)
23 {
24     std::wcerr << L"Hello World!\n";
25 
26 #ifdef _LIBCPP_HAS_NO_STDOUT
27     assert(std::wcerr.tie() == NULL);
28 #else
29     assert(std::wcerr.tie() == &std::wcout);
30 #endif
31     assert(std::wcerr.flags() & std::ios_base::unitbuf);
32 
33     return 0;
34 }
35