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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: no-localization
// UNSUPPORTED: libcpp-has-no-experimental-syncstream
// <syncstream>
// template <class charT, class traits, class Allocator>
// class basic_syncbuf;
// explicit basic_syncbuf(streambuf_type* obuf);
#include <cassert>
#include <concepts>
#include <syncstream>
#include "test_macros.h"
#include "constexpr_char_traits.h"
#include "test_allocator.h"
template <class CharT>
void test() {
{
using Buf = std::basic_syncbuf<CharT>;
static_assert(!std::convertible_to<std::basic_streambuf<CharT>*, Buf>);
static_assert(std::constructible_from<Buf, std::basic_streambuf<CharT>*>);
{
Buf buf{nullptr};
assert(buf.get_wrapped() == nullptr);
assert(buf.get_allocator() == std::allocator<CharT>());
}
{
Buf w;
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
#endif
{
Buf buf{&w};
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
#endif
assert(buf.get_wrapped() == &w);
assert(buf.get_allocator() == std::allocator<CharT>());
}
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
#endif
}
}
{
using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>>;
static_assert(!std::convertible_to<std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*, Buf>);
static_assert(std::constructible_from<Buf, std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*>);
{
Buf buf{nullptr};
assert(buf.get_wrapped() == nullptr);
assert(buf.get_allocator() == std::allocator<CharT>());
}
{
Buf w;
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
#endif
{
Buf buf{&w};
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
#endif
assert(buf.get_wrapped() == &w);
assert(buf.get_allocator() == std::allocator<CharT>());
}
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
#endif
}
}
{
using Buf = std::basic_syncbuf<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
static_assert(!std::convertible_to<std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*, Buf>);
static_assert(std::constructible_from<Buf, std::basic_streambuf<CharT, constexpr_char_traits<CharT>>*>);
{
Buf buf{nullptr};
assert(buf.get_wrapped() == nullptr);
assert(buf.get_allocator() == test_allocator<CharT>());
}
{
Buf w;
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
#endif
{
Buf buf{&w};
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 1);
#endif
assert(buf.get_wrapped() == &w);
assert(buf.get_allocator() == test_allocator<CharT>());
}
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(&w) == 0);
#endif
}
}
}
int main(int, char**) {
test<char>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test<wchar_t>();
#endif
return 0;
}
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