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// UNSUPPORTED: c++03, c++11, c++14, c++17
10// UNSUPPORTED: no-localization
11// UNSUPPORTED: libcpp-has-no-experimental-syncstream
12
13// <syncstream>
14
15// template <class charT, class traits, class Allocator>
16// class basic_osyncstream;
17
18// basic_osyncstream(basic_osyncstream&&) noexcept;
19
20// TODO Why is this noexcept?
21// Does the reasoning for https://cplusplus.github.io/LWG/issue3867 not hold true here?
22
23#include <cassert>
24#include <sstream>
25#include <syncstream>
26
27#include "test_macros.h"
28#include "constexpr_char_traits.h"
29#include "test_allocator.h"
30
31template <class CharT>
32void test() {
33 {
34 using OS = std::basic_osyncstream<CharT>;
35 using W = std::basic_syncbuf<CharT>;
36
37 const std::allocator<CharT> alloc;
38 {
39 OS os = {OS{nullptr, alloc}};
40 assert(os.get_wrapped() == nullptr);
41 assert(os.rdbuf()->get_wrapped() == nullptr);
42 assert(os.rdbuf()->get_allocator() == alloc);
43 ASSERT_NOEXCEPT(OS{std::move(os)});
44 }
45 {
46 W w;
47#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
48 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
49#endif
50 {
51 OS os = {OS{&w, alloc}};
52#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
53 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
54#endif
55 assert(os.get_wrapped() == &w);
56 assert(os.rdbuf()->get_wrapped() == &w);
57 assert(os.rdbuf()->get_allocator() == alloc);
58 }
59#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
60 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
61#endif
62 }
63 }
64
65 {
66 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>>;
67 using W = std::basic_stringbuf<CharT, constexpr_char_traits<CharT>>;
68
69 const std::allocator<CharT> alloc;
70 {
71 OS os = {OS{nullptr, alloc}};
72 assert(os.get_wrapped() == nullptr);
73 assert(os.rdbuf()->get_wrapped() == nullptr);
74 assert(os.rdbuf()->get_allocator() == alloc);
75 }
76 {
77 W w;
78#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
79 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
80#endif
81 {
82 OS os = {OS{&w, alloc}};
83#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
84 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
85#endif
86 assert(os.get_wrapped() == &w);
87 assert(os.rdbuf()->get_wrapped() == &w);
88 assert(os.rdbuf()->get_allocator() == alloc);
89 }
90#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
91 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
92#endif
93 }
94 }
95
96 {
97 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
98 using W = std::basic_stringbuf<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
99
100 const test_allocator<CharT> alloc;
101 {
102 OS os = {OS{nullptr, alloc}};
103 assert(os.get_wrapped() == nullptr);
104 assert(os.rdbuf()->get_wrapped() == nullptr);
105 assert(os.rdbuf()->get_allocator() == alloc);
106 }
107 {
108 W w;
109#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
110 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
111#endif
112 {
113 OS os = {OS{&w, alloc}};
114#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
115 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
116#endif
117 assert(os.get_wrapped() == &w);
118 assert(os.rdbuf()->get_wrapped() == &w);
119 assert(os.rdbuf()->get_allocator() == alloc);
120 }
121#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
122 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
123#endif
124 }
125 }
126}
127
128int main(int, char**) {
129 test<char>();
130#ifndef TEST_HAS_NO_WIDE_CHARACTERS
131 test<wchar_t>();
132#endif
133
134 return 0;
135}
136

source code of libcxx/test/std/input.output/syncstream/osyncstream/syncstream.osyncstream.cons/cons.move.pass.cpp