libcxx/test/std/time/time.zone/time.zone.info/time.zone.info.local/local_info.members.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
  11 // XFAIL: libcpp-has-no-experimental-tzdb
  12
  13 // <chrono>
  14
  15 // struct local_info {
  16 //   static constexpr int unique      = 0;
  17 //   static constexpr int nonexistent = 1;
  18 //   static constexpr int ambiguous   = 2;
  19 //
  20 //   int result;
  21 //   sys_info first;
  22 //   sys_info second;
  23 // };
  24
  25 // Validates whether:
  26 // - The static members are present as static constexpr members.
  27 // - The members are present as non-const members.
  28 // - The struct is an aggregate.
  29
  30 #include <chrono>
  31 #include <string>
  32 #include <type_traits>
  33
  34 int main(int, const char**) {
  35   {
  36     constexpr const int& result = std::chrono::local_info::unique;
  37     static_assert(result == 0);
  38   }
  39   {
  40     constexpr const int& result = std::chrono::local_info::nonexistent;
  41     static_assert(result == 1);
  42   }
  43   {
  44     constexpr const int& result = std::chrono::local_info::ambiguous;
  45     static_assert(result == 2);
  46   }
  47
  48   static_assert(std::is_aggregate_v<std::chrono::local_info>);
  49
  50   std::chrono::local_info local_info{.result = 0, .first = std::chrono::sys_info{}, .second = std::chrono::sys_info{}};
  51
  52   [[maybe_unused]] int& result                   = local_info.result;
  53   [[maybe_unused]] std::chrono::sys_info& first  = local_info.first;
  54   [[maybe_unused]] std::chrono::sys_info& second = local_info.second;
  55
  56   return 0;
  57 }