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#include <cassert>
16#include <iterator>
17#include <sstream>
18
19#include "test_macros.h"
20
21template <typename Char, typename Traits = std::char_traits<Char> >
22struct my_streambuf : public std::basic_streambuf<Char,Traits> {
23 typedef typename std::basic_streambuf<Char,Traits>::int_type int_type;
24 typedef typename std::basic_streambuf<Char,Traits>::char_type char_type;
25
26 my_streambuf() {}
27 int_type sputc(char_type) { return Traits::eof(); }
28};
29
30int main(int, char**)
31{
32 {
33 my_streambuf<char> buf;
34 std::ostreambuf_iterator<char> i(&buf);
35 i = 'a';
36 assert(i.failed());
37 }
38#ifndef TEST_HAS_NO_WIDE_CHARACTERS
39 {
40 my_streambuf<wchar_t> buf;
41 std::ostreambuf_iterator<wchar_t> i(&buf);
42 i = L'a';
43 assert(i.failed());
44 }
45#endif
46
47 return 0;
48}
49

source code of libcxx/test/std/iterators/stream.iterators/ostreambuf.iterator/ostreambuf.iter.ops/failed.pass.cpp