libcxx/include/__chrono/literals.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 _LIBCPP___CHRONO_LITERALS_H
  11 #define _LIBCPP___CHRONO_LITERALS_H
  12
  13 #include <__chrono/day.h>
  14 #include <__chrono/year.h>
  15 #include <__config>
  16
  17 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  18 #  pragma GCC system_header
  19 #endif
  20
  21 #if _LIBCPP_STD_VER >= 20
  22
  23 _LIBCPP_BEGIN_NAMESPACE_STD
  24
  25 inline namespace literals
  26 {
  27   inline namespace chrono_literals
  28   {
  29     _LIBCPP_HIDE_FROM_ABI constexpr chrono::day operator ""d(unsigned long long __d) noexcept
  30     {
  31         return chrono::day(static_cast<unsigned>(__d));
  32     }
  33
  34     _LIBCPP_HIDE_FROM_ABI constexpr chrono::year operator ""y(unsigned long long __y) noexcept
  35     {
  36         return chrono::year(static_cast<int>(__y));
  37     }
  38 } // namespace chrono_literals
  39 } // namespace literals
  40
  41 namespace chrono { // hoist the literals into namespace std::chrono
  42    using namespace literals::chrono_literals;
  43 } // namespace chrono
  44
  45 _LIBCPP_END_NAMESPACE_STD
  46
  47 #endif // _LIBCPP_STD_VER >= 20
  48
  49 #endif // _LIBCPP___CHRONO_LITERALS_H