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 // <iterator>
10 
11 // class ostreambuf_iterator
12 
13 // bool failed() const throw();
14 //
15 // Extension: constructing from NULL is UB; we just make it a failed iterator
16 
17 #include <iterator>
18 #include <cassert>
19 
20 #include "test_macros.h"
21 
main(int,char **)22 int main(int, char**)
23 {
24     {
25         std::ostreambuf_iterator<char> i(nullptr);
26         assert(i.failed());
27     }
28 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
29     {
30         std::ostreambuf_iterator<wchar_t> i(nullptr);
31         assert(i.failed());
32     }
33 #endif
34 
35   return 0;
36 }
37