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_ostream& 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
29 template <class CharT>
test()30 void test() {
31 {
32 using OS = std::basic_osyncstream<CharT>;
33 using W = std::basic_ostringstream<CharT>;
34
35 const std::allocator<CharT> alloc;
36
37 {
38 W w;
39 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
40 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
41 #endif
42 {
43 OS os = {w, alloc};
44 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
45 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);
46 #endif
47 assert(os.get_wrapped() == w.rdbuf());
48 assert(os.rdbuf()->get_wrapped() == w.rdbuf());
49 assert(os.rdbuf()->get_allocator() == alloc);
50 }
51 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
52 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
53 #endif
54 }
55 }
56 {
57 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>>;
58 using W = std::basic_ostringstream<CharT, constexpr_char_traits<CharT>>;
59
60 const std::allocator<CharT> alloc;
61 {
62 W w;
63 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
64 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
65 #endif
66 {
67 OS os = {w.rdbuf(), alloc};
68 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
69 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);
70 #endif
71 assert(os.get_wrapped() == w.rdbuf());
72 assert(os.rdbuf()->get_wrapped() == w.rdbuf());
73 assert(os.rdbuf()->get_allocator() == alloc);
74 }
75 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
76 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
77 #endif
78 }
79 }
80
81 {
82 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
83 using W = std::basic_ostringstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
84
85 const test_allocator<CharT> alloc;
86 {
87 W w;
88 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
89 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
90 #endif
91 {
92 OS os = {w.rdbuf(), alloc};
93 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
94 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);
95 #endif
96 assert(os.get_wrapped() == w.rdbuf());
97 assert(os.rdbuf()->get_wrapped() == w.rdbuf());
98 assert(os.rdbuf()->get_allocator() == alloc);
99 }
100 #if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
101 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
102 #endif
103 }
104 }
105 }
106
main(int,char **)107 int main(int, char**) {
108 test<char>();
109 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
110 test<wchar_t>();
111 #endif
112
113 return 0;
114 }
115