libcxx/test/std/time/time.zone/time.zone.info/time.zone.info.local/ostream.pass.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-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 local_info& r);
  22
  23 // [time.zone.info.local]
  24 //   3 Effects: Streams out the local_info object r in an unspecified format.
  25 //   4 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
  36 template <class CharT>
  37 static 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::chrono::local_info l{0, s, s};
  41   std::basic_ostringstream<CharT> os;
  42   std::basic_ostream<CharT>& result = std::chrono::operator<<(os, l);
  43   assert(std::addressof(result) == std::addressof(os));
  44 }
  45
  46 int main(int, const char**) {
  47   test<char>();
  48 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  49   test<wchar_t>();
  50 #endif
  51
  52   return 0;
  53 }