libcxx/test/support/test_chrono_leap_second.h

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP
  11 #define SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP
  12
  13 // Contains helper functions to create a std::chrono::leap_second.
  14 //
  15 // Since the standard doesn't specify how a @ref std::chrono::leap_second is
  16 // constructed this is implementation defined. To make the public API tests of
  17 // the class generic this header defines helper functions to create the
  18 // required object.
  19 //
  20 // Note This requires every standard library implementation to write their own
  21 // helper function. Vendors are encouraged to create a pull request at
  22 // https://github.com/llvm/llvm-project so their specific implementation can be
  23 // part of this file.
  24
  25 #include "test_macros.h"
  26
  27 #if TEST_STD_VER < 20
  28 #  error "The format header requires at least C++20"
  29 #endif
  30
  31 #include <chrono>
  32
  33 #ifdef _LIBCPP_VERSION
  34
  35 #  include <__utility/private_constructor_tag.h>
  36
  37 inline constexpr std::chrono::leap_second
  38 test_leap_second_create(const std::chrono::sys_seconds& date, const std::chrono::seconds& value) {
  39   return std::chrono::leap_second{std::__private_constructor_tag{}, date, value};
  40 }
  41
  42 #else // _LIBCPP_VERSION
  43 #  error                                                                                                               \
  44       "Please create a vendor specific version of the test typedef and file a PR at https://github.com/llvm/llvm-project"
  45 #endif // _LIBCPP_VERSION
  46
  47 #endif // SUPPORT_TEST_CHRONO_LEAP_SECOND_HPP