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_YEAR_MONTH_H 11 #define _LIBCPP___CHRONO_YEAR_MONTH_H 12 13 #include <__chrono/duration.h> 14 #include <__chrono/month.h> 15 #include <__chrono/year.h> 16 #include <__config> 17 #include <compare> 18 19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 20 # pragma GCC system_header 21 #endif 22 23 #if _LIBCPP_STD_VER > 17 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 namespace chrono 28 { 29 30 class year_month { 31 chrono::year __y_; 32 chrono::month __m_; 33 public: 34 _LIBCPP_HIDE_FROM_ABI year_month() = default; 35 _LIBCPP_HIDE_FROM_ABI constexpr year_month(const chrono::year& __yval, const chrono::month& __mval) noexcept 36 : __y_{__yval}, __m_{__mval} {} 37 _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::year year() const noexcept { return __y_; } 38 _LIBCPP_HIDE_FROM_ABI inline constexpr chrono::month month() const noexcept { return __m_; } 39 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator+=(const months& __dm) noexcept { this->__m_ += __dm; return *this; } 40 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator-=(const months& __dm) noexcept { this->__m_ -= __dm; return *this; } 41 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator+=(const years& __dy) noexcept { this->__y_ += __dy; return *this; } 42 _LIBCPP_HIDE_FROM_ABI inline constexpr year_month& operator-=(const years& __dy) noexcept { this->__y_ -= __dy; return *this; } 43 _LIBCPP_HIDE_FROM_ABI inline constexpr bool ok() const noexcept { return __y_.ok() && __m_.ok(); } 44 }; 45 46 _LIBCPP_HIDE_FROM_ABI inline constexpr 47 year_month operator/(const year& __y, const month& __m) noexcept { return year_month{__y, __m}; } 48 49 _LIBCPP_HIDE_FROM_ABI inline constexpr 50 year_month operator/(const year& __y, int __m) noexcept { return year_month{__y, month(__m)}; } 51 52 _LIBCPP_HIDE_FROM_ABI inline constexpr 53 bool operator==(const year_month& __lhs, const year_month& __rhs) noexcept 54 { return __lhs.year() == __rhs.year() && __lhs.month() == __rhs.month(); } 55 56 _LIBCPP_HIDE_FROM_ABI constexpr strong_ordering operator<=>(const year_month& __lhs, const year_month& __rhs) noexcept { 57 if (auto __c = __lhs.year() <=> __rhs.year(); __c != 0) 58 return __c; 59 return __lhs.month() <=> __rhs.month(); 60 } 61 62 _LIBCPP_HIDE_FROM_ABI constexpr 63 year_month operator+(const year_month& __lhs, const months& __rhs) noexcept 64 { 65 int __dmi = static_cast<int>(static_cast<unsigned>(__lhs.month())) - 1 + __rhs.count(); 66 const int __dy = (__dmi >= 0 ? __dmi : __dmi-11) / 12; 67 __dmi = __dmi - __dy * 12 + 1; 68 return (__lhs.year() + years(__dy)) / month(static_cast<unsigned>(__dmi)); 69 } 70 71 _LIBCPP_HIDE_FROM_ABI constexpr 72 year_month operator+(const months& __lhs, const year_month& __rhs) noexcept 73 { return __rhs + __lhs; } 74 75 _LIBCPP_HIDE_FROM_ABI constexpr 76 year_month operator+(const year_month& __lhs, const years& __rhs) noexcept 77 { return (__lhs.year() + __rhs) / __lhs.month(); } 78 79 _LIBCPP_HIDE_FROM_ABI constexpr 80 year_month operator+(const years& __lhs, const year_month& __rhs) noexcept 81 { return __rhs + __lhs; } 82 83 _LIBCPP_HIDE_FROM_ABI constexpr 84 months operator-(const year_month& __lhs, const year_month& __rhs) noexcept 85 { return (__lhs.year() - __rhs.year()) + months(static_cast<unsigned>(__lhs.month()) - static_cast<unsigned>(__rhs.month())); } 86 87 _LIBCPP_HIDE_FROM_ABI constexpr 88 year_month operator-(const year_month& __lhs, const months& __rhs) noexcept 89 { return __lhs + -__rhs; } 90 91 _LIBCPP_HIDE_FROM_ABI constexpr 92 year_month operator-(const year_month& __lhs, const years& __rhs) noexcept 93 { return __lhs + -__rhs; } 94 95 } // namespace chrono 96 97 _LIBCPP_END_NAMESPACE_STD 98 99 #endif // _LIBCPP_STD_VER > 17 100 101 #endif // _LIBCPP___CHRONO_YEAR_MONTH_H 102