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(streambuf_type* os, const Allocator& allocator);
19
20#include <cassert>
21#include <concepts>
22#include <syncstream>
23#include <sstream>
24
25#include "test_macros.h"
26#include "constexpr_char_traits.h"
27#include "test_allocator.h"
28
29template <class CharT>
30void test() {
31 {
32 using OS = std::basic_osyncstream<CharT>;
33 using W = std::basic_stringbuf<CharT>;
34
35 const std::allocator<CharT> alloc;
36 {
37 OS os = {nullptr, alloc};
38 assert(os.get_wrapped() == nullptr);
39 assert(os.rdbuf()->get_wrapped() == nullptr);
40 assert(os.rdbuf()->get_allocator() == alloc);
41 }
42 {
43 W w;
44#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
45 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
46#endif
47 {
48 OS os = {&w, alloc};
49#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
50 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
51#endif
52 assert(os.get_wrapped() == &w);
53 assert(os.rdbuf()->get_wrapped() == &w);
54 assert(os.rdbuf()->get_allocator() == alloc);
55 }
56#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
57 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
58#endif
59 }
60 }
61
62 {
63 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>>;
64 using W = std::basic_stringbuf<CharT, constexpr_char_traits<CharT>>;
65
66 const std::allocator<CharT> alloc;
67 {
68 OS os = {nullptr, alloc};
69 assert(os.get_wrapped() == nullptr);
70 assert(os.rdbuf()->get_wrapped() == nullptr);
71 assert(os.rdbuf()->get_allocator() == alloc);
72 }
73 {
74 W w;
75#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
76 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
77#endif
78 {
79 OS os = {&w, alloc};
80#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
81 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
82#endif
83 assert(os.get_wrapped() == &w);
84 assert(os.rdbuf()->get_wrapped() == &w);
85 assert(os.rdbuf()->get_allocator() == alloc);
86 }
87#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
88 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
89#endif
90 }
91 }
92
93 {
94 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
95 using W = std::basic_stringbuf<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
96
97 const test_allocator<CharT> alloc;
98 {
99 OS os = {nullptr, alloc};
100 assert(os.get_wrapped() == nullptr);
101 assert(os.rdbuf()->get_wrapped() == nullptr);
102 assert(os.rdbuf()->get_allocator() == alloc);
103 }
104 {
105 W w;
106#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
107 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
108#endif
109 {
110 OS os = {&w, alloc};
111#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
112 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
113#endif
114 assert(os.get_wrapped() == &w);
115 assert(os.rdbuf()->get_wrapped() == &w);
116 assert(os.rdbuf()->get_allocator() == alloc);
117 }
118#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
119 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
120#endif
121 }
122 }
123}
124
125int main(int, char**) {
126 test<char>();
127#ifndef TEST_HAS_NO_WIDE_CHARACTERS
128 test<wchar_t>();
129#endif
130
131 return 0;
132}
133

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