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// <ostream>
10
11// template <class charT, class traits = char_traits<charT> >
12// class basic_ostream;
13
14// template <class charT, class traits>
15// basic_ostream<charT,traits>& endl(basic_ostream<charT,traits>& os);
16
17#include <ostream>
18#include <cassert>
19
20#include "test_macros.h"
21
22int sync_called = 0;
23
24template <class CharT>
25class testbuf
26 : public std::basic_streambuf<CharT>
27{
28 typedef std::basic_streambuf<CharT> base;
29 std::basic_string<CharT> str_;
30public:
31 testbuf()
32 {
33 }
34
35 std::basic_string<CharT> str() const
36 {return std::basic_string<CharT>(base::pbase(), base::pptr());}
37
38protected:
39
40 virtual typename base::int_type
41 overflow(typename base::int_type ch = base::traits_type::eof())
42 {
43 if (ch != base::traits_type::eof())
44 {
45 int n = static_cast<int>(str_.size());
46 str_.push_back(static_cast<CharT>(ch));
47 str_.resize(str_.capacity());
48 base::setp(const_cast<CharT*>(str_.data()),
49 const_cast<CharT*>(str_.data() + str_.size()));
50 base::pbump(n+1);
51 }
52 return ch;
53 }
54
55 virtual int
56 sync()
57 {
58 ++sync_called;
59 return 0;
60 }
61};
62
63int main(int, char**)
64{
65 {
66 testbuf<char> sb;
67 std::ostream os(&sb);
68 std::endl(os);
69 assert(sb.str() == "\n");
70 assert(sync_called == 1);
71 assert(os.good());
72 }
73#ifndef TEST_HAS_NO_WIDE_CHARACTERS
74 {
75 testbuf<wchar_t> sb;
76 std::wostream os(&sb);
77 std::endl(os);
78 assert(sb.str() == L"\n");
79 assert(sync_called == 2);
80 assert(os.good());
81 }
82#endif
83
84 return 0;
85}
86

source code of libcxx/test/std/input.output/iostream.format/output.streams/ostream.manip/endl.pass.cpp