1#ifndef GREG_DATE_HPP___
2#define GREG_DATE_HPP___
3
4/* Copyright (c) 2002,2003, 2020 CrystalClear Software, Inc.
5 * Use, modification and distribution is subject to the
6 * Boost Software License, Version 1.0. (See accompanying
7 * file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
8 * Author: Jeff Garland
9 * $Date$
10 */
11
12#include <boost/throw_exception.hpp>
13#include <boost/date_time/compiler_config.hpp>
14#include <boost/date_time/date.hpp>
15#include <boost/date_time/special_defs.hpp>
16#include <boost/date_time/gregorian/greg_calendar.hpp>
17#include <boost/date_time/gregorian/greg_duration.hpp>
18
19namespace boost {
20namespace gregorian {
21
22 //bring special enum values into the namespace
23 using date_time::special_values;
24 using date_time::not_special;
25 using date_time::neg_infin;
26 using date_time::pos_infin;
27 using date_time::not_a_date_time;
28 using date_time::max_date_time;
29 using date_time::min_date_time;
30
31 //! A date type based on gregorian_calendar
32 /*! This class is the primary interface for programming with
33 greogorian dates. The is a lightweight type that can be
34 freely passed by value. All comparison operators are
35 supported.
36 \ingroup date_basics
37 */
38 class BOOST_SYMBOL_VISIBLE date : public date_time::date<date, gregorian_calendar, date_duration>
39 {
40 public:
41 typedef gregorian_calendar::year_type year_type;
42 typedef gregorian_calendar::month_type month_type;
43 typedef gregorian_calendar::day_type day_type;
44 typedef gregorian_calendar::day_of_year_type day_of_year_type;
45 typedef gregorian_calendar::ymd_type ymd_type;
46 typedef gregorian_calendar::date_rep_type date_rep_type;
47 typedef gregorian_calendar::date_int_type date_int_type;
48 typedef date_duration duration_type;
49#if !defined(DATE_TIME_NO_DEFAULT_CONSTRUCTOR)
50 //! Default constructor constructs with not_a_date_time
51 BOOST_CXX14_CONSTEXPR date():
52 date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv: not_a_date_time))
53 {}
54#endif // DATE_TIME_NO_DEFAULT_CONSTRUCTOR
55 //! Main constructor with year, month, day
56 BOOST_CXX14_CONSTEXPR date(year_type y, month_type m, day_type d)
57 : date_time::date<date, gregorian_calendar, date_duration>(y, m, d)
58 {
59 if (gregorian_calendar::end_of_month_day(year: y, month: m) < d) {
60 boost::throw_exception(e: bad_day_of_month(std::string("Day of month is not valid for year")));
61 }
62 }
63 //! Constructor from a ymd_type structure
64 BOOST_CXX14_CONSTEXPR explicit date(const ymd_type& ymd)
65 : date_time::date<date, gregorian_calendar, date_duration>(ymd)
66 {}
67 //! Needed copy constructor
68 BOOST_CXX14_CONSTEXPR explicit date(const date_int_type& rhs):
69 date_time::date<date,gregorian_calendar, date_duration>(rhs)
70 {}
71 //! Needed copy constructor
72 BOOST_CXX14_CONSTEXPR explicit date(date_rep_type rhs):
73 date_time::date<date,gregorian_calendar, date_duration>(rhs)
74 {}
75 //! Constructor for infinities, not a date, max and min date
76 BOOST_CXX14_CONSTEXPR explicit date(special_values sv):
77 date_time::date<date, gregorian_calendar, date_duration>(date_rep_type::from_special(sv))
78 {
79 if (sv == min_date_time)
80 {
81 *this = date(1400, 1, 1);
82 }
83 if (sv == max_date_time)
84 {
85 *this = date(9999, 12, 31);
86 }
87
88 }
89 //!Return the Julian Day number for the date.
90 BOOST_CXX14_CONSTEXPR date_int_type julian_day() const
91 {
92 ymd_type ymd = year_month_day();
93 return gregorian_calendar::julian_day_number(ymd);
94 }
95 //!Return the day of year 1..365 or 1..366 (for leap year)
96 BOOST_CXX14_CONSTEXPR day_of_year_type day_of_year() const
97 {
98 date start_of_year(year(), 1, 1);
99 unsigned short doy = static_cast<unsigned short>((*this-start_of_year).days() + 1);
100 return day_of_year_type(doy);
101 }
102 //!Return the Modified Julian Day number for the date.
103 BOOST_CXX14_CONSTEXPR date_int_type modjulian_day() const
104 {
105 ymd_type ymd = year_month_day();
106 return gregorian_calendar::modjulian_day_number(ymd);
107 }
108 //!Return the iso 8601 week number 1..53
109 BOOST_CXX14_CONSTEXPR int week_number() const
110 {
111 ymd_type ymd = year_month_day();
112 return gregorian_calendar::week_number(ymd);
113 }
114 //! Return the day number from the calendar
115 BOOST_CXX14_CONSTEXPR date_int_type day_number() const
116 {
117 return days_;
118 }
119 //! Return the last day of the current month
120 BOOST_CXX14_CONSTEXPR date end_of_month() const
121 {
122 ymd_type ymd = year_month_day();
123 unsigned short eom_day = gregorian_calendar::end_of_month_day(year: ymd.year, month: ymd.month);
124 return date(ymd.year, ymd.month, eom_day);
125 }
126
127 friend BOOST_CXX14_CONSTEXPR
128 bool operator==(const date& lhs, const date& rhs);
129
130 private:
131
132 };
133
134 inline BOOST_CXX14_CONSTEXPR
135 bool operator==(const date& lhs, const date& rhs)
136 {
137 return lhs.days_ == rhs.days_;
138 }
139
140
141} } //namespace gregorian
142
143
144
145#endif
146

source code of include/boost/date_time/gregorian/greg_date.hpp