xref: /llvm-project/libcxx/test/support/test_chrono_leap_second.h (revision 0a1317564a6b437760d96f0a227a3c910875428d)

// -*- 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
//
//===----------------------------------------------------------------------===//

#ifndef SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP
#define SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP

// Contains helper functions to create a std::chrono::leap_second.
//
// Since the standard doesn't specify how a @ref std::chrono::leap_second is
// constructed this is implementation defined. To make the public API tests of
// the class generic this header defines helper functions to create the
// required object.
//
// Note This requires every standard library implementation to write their own
// helper function. Vendors are encouraged to create a pull request at
// https://github.com/llvm/llvm-project so their specific implementation can be
// part of this file.

#include "test_macros.h"

#if TEST_STD_VER < 20
#  error "The format header requires at least C++20"
#endif

#include <chrono>

#ifdef _LIBCPP_VERSION

#  include <__utility/private_constructor_tag.h>

inline constexpr std::chrono::leap_second
test_leap_second_create(const std::chrono::sys_seconds& date, const std::chrono::seconds& value) {
  return std::chrono::leap_second{std::__private_constructor_tag{}, date, value};
}

#else // _LIBCPP_VERSION
#  error                                                                                                               \
      "Please create a vendor specific version of the test typedef and file a PR at https://github.com/llvm/llvm-project"
#endif // _LIBCPP_VERSION

#endif // SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP