121 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710// UNSUPPORTED: no-localization11// UNSUPPORTED: libcpp-has-no-experimental-syncstream12 13// <syncstream>14 15// template <class charT, class traits, class Allocator>16// class basic_osyncstream;17 18// explicit basic_osyncstream(basic_ostream& os);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_ostringstream<CharT>;34 35 static_assert(!std::convertible_to<std::basic_ostream<CharT>&, OS>);36 static_assert(std::constructible_from<OS, std::basic_ostream<CharT>&>);37 38 {39 W w;40#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)41 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);42#endif43 {44 OS os{w};45#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)46 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);47#endif48 assert(os.get_wrapped() == w.rdbuf());49 assert(os.rdbuf()->get_wrapped() == w.rdbuf());50 assert(os.rdbuf()->get_allocator() == std::allocator<CharT>());51 }52#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)53 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);54#endif55 }56 }57 58 {59 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>>;60 using W = std::basic_ostringstream<CharT, constexpr_char_traits<CharT>>;61 62 static_assert(!std::convertible_to<std::basic_ostream<CharT, constexpr_char_traits<CharT>>&, OS>);63 static_assert(std::constructible_from<OS, std::basic_ostream<CharT, constexpr_char_traits<CharT>>&>);64 65 {66 W w;67#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)68 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);69#endif70 {71 OS os{w};72#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)73 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);74#endif75 assert(os.get_wrapped() == w.rdbuf());76 assert(os.rdbuf()->get_wrapped() == w.rdbuf());77 assert(os.rdbuf()->get_allocator() == std::allocator<CharT>());78 }79#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)80 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);81#endif82 }83 }84 85 {86 using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;87 using W = std::basic_ostringstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;88 89 static_assert(!std::convertible_to<std::basic_ostream<CharT, constexpr_char_traits<CharT>>&, OS>);90 static_assert(std::constructible_from<OS, std::basic_ostream<CharT, constexpr_char_traits<CharT>>&>);91 92 {93 W w;94#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)95 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);96#endif97 {98 OS os{w};99#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)100 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);101#endif102 assert(os.get_wrapped() == w.rdbuf());103 assert(os.rdbuf()->get_wrapped() == w.rdbuf());104 assert(os.rdbuf()->get_allocator() == test_allocator<CharT>());105 }106#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)107 assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);108#endif109 }110 }111}112 113int main(int, char**) {114 test<char>();115#ifndef TEST_HAS_NO_WIDE_CHARACTERS116 test<wchar_t>();117#endif118 119 return 0;120}121