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
12// TODO FMT This test should not require std::to_chars(floating-point)
13// XFAIL: availability-fp_to_chars-missing
14
15// XFAIL: libcpp-has-no-experimental-tzdb
16
17// <chrono>
18
19// template<class charT, class traits>
20// basic_ostream<charT, traits>&
21// operator<<(basic_ostream<charT, traits>& os, const sys_info& r);
22
23// [time.zone.info.sys]
24// 7 Effects: Streams out the sys_info object r in an unspecified format.
25// 8 Returns: os.
26//
27// There is a private libc++ test that validates the exact output.
28
29#include <cassert>
30#include <chrono>
31#include <memory>
32#include <sstream>
33
34#include "test_macros.h"
35
36template <class CharT>
37static void test() {
38 using namespace std::literals::chrono_literals;
39 std::chrono::sys_info s{std::chrono::sys_seconds{0s}, std::chrono::sys_seconds{0s}, 0h, 0min, ""};
40 std::basic_ostringstream<CharT> os;
41 std::basic_ostream<CharT>& result = std::chrono::operator<<(os, s);
42 assert(std::addressof(result) == std::addressof(os));
43}
44
45int main(int, const char**) {
46 test<char>();
47#ifndef TEST_HAS_NO_WIDE_CHARACTERS
48 test<wchar_t>();
49#endif
50
51 return 0;
52}
53

source code of libcxx/test/std/time/time.zone/time.zone.info/time.zone.info.sys/ostream.pass.cpp