7cc72a0a2e
This patch implements `std::basic_syncbuf` and `std::basic_osyncstream` as specified in paper p0053r7. ~~For ease of reviewing I am submitting this patch before submitting a patch for `std::basic_osyncstream`. ~~ ~~Please note, this patch is not 100% complete. I plan on adding more tests (see comments), specifically I plan on adding tests for multithreading and synchronization.~~ Edit: I decided that it would be far easier for me to keep track of this and make changes that affect both `std::basic_syncbuf` and `std::basic_osyncstream` if both were in one patch. The patch was originally written by @zoecarver Implements - P0053R7 - C++ Synchronized Buffered Ostream - LWG-3127 basic_osyncstream::rdbuf needs a const_cast - LWG-3334 basic_osyncstream move assignment and destruction calls basic_syncbuf::emit() twice - LWG-3570 basic_osyncstream::emit should be an unformatted output function - LWG-3867 Should std::basic_osyncstream's move assignment operator be noexcept? Reviewed By: ldionne, #libc Differential Revision: https://reviews.llvm.org/D67086
121 lines
4.0 KiB
C++
121 lines
4.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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_osyncstream;
|
|
|
|
// explicit basic_osyncstream(basic_ostream& os);
|
|
|
|
#include <cassert>
|
|
#include <concepts>
|
|
#include <syncstream>
|
|
#include <sstream>
|
|
|
|
#include "test_macros.h"
|
|
#include "constexpr_char_traits.h"
|
|
#include "test_allocator.h"
|
|
|
|
template <class CharT>
|
|
void test() {
|
|
{
|
|
using OS = std::basic_osyncstream<CharT>;
|
|
using W = std::basic_ostringstream<CharT>;
|
|
|
|
static_assert(!std::convertible_to<std::basic_ostream<CharT>&, OS>);
|
|
static_assert(std::constructible_from<OS, std::basic_ostream<CharT>&>);
|
|
|
|
{
|
|
W w;
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
|
|
#endif
|
|
{
|
|
OS os{w};
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);
|
|
#endif
|
|
assert(os.get_wrapped() == w.rdbuf());
|
|
assert(os.rdbuf()->get_wrapped() == w.rdbuf());
|
|
assert(os.rdbuf()->get_allocator() == std::allocator<CharT>());
|
|
}
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
{
|
|
using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>>;
|
|
using W = std::basic_ostringstream<CharT, constexpr_char_traits<CharT>>;
|
|
|
|
static_assert(!std::convertible_to<std::basic_ostream<CharT, constexpr_char_traits<CharT>>&, OS>);
|
|
static_assert(std::constructible_from<OS, std::basic_ostream<CharT, constexpr_char_traits<CharT>>&>);
|
|
|
|
{
|
|
W w;
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
|
|
#endif
|
|
{
|
|
OS os{w};
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);
|
|
#endif
|
|
assert(os.get_wrapped() == w.rdbuf());
|
|
assert(os.rdbuf()->get_wrapped() == w.rdbuf());
|
|
assert(os.rdbuf()->get_allocator() == std::allocator<CharT>());
|
|
}
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
{
|
|
using OS = std::basic_osyncstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
|
|
using W = std::basic_ostringstream<CharT, constexpr_char_traits<CharT>, test_allocator<CharT>>;
|
|
|
|
static_assert(!std::convertible_to<std::basic_ostream<CharT, constexpr_char_traits<CharT>>&, OS>);
|
|
static_assert(std::constructible_from<OS, std::basic_ostream<CharT, constexpr_char_traits<CharT>>&>);
|
|
|
|
{
|
|
W w;
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
|
|
#endif
|
|
{
|
|
OS os{w};
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 1);
|
|
#endif
|
|
assert(os.get_wrapped() == w.rdbuf());
|
|
assert(os.rdbuf()->get_wrapped() == w.rdbuf());
|
|
assert(os.rdbuf()->get_allocator() == test_allocator<CharT>());
|
|
}
|
|
#if defined(_LIBCPP_VERSION) && !defined(TEST_HAS_NO_THREADS)
|
|
assert(std::__wrapped_streambuf_mutex::__instance().__get_count(w.rdbuf()) == 0);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int, char**) {
|
|
test<char>();
|
|
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
|
|
test<wchar_t>();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|