1#ifndef GREG_MONTH_HPP___
2#define GREG_MONTH_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, Bart Garst
9 * $Date$
10 */
11
12#include <boost/date_time/constrained_value.hpp>
13#include <boost/date_time/date_defs.hpp>
14#include <boost/date_time/compiler_config.hpp>
15#include <stdexcept>
16#include <string>
17
18namespace boost {
19namespace gregorian {
20
21 typedef date_time::months_of_year months_of_year;
22
23 //bring enum values into the namespace
24 using date_time::Jan;
25 using date_time::Feb;
26 using date_time::Mar;
27 using date_time::Apr;
28 using date_time::May;
29 using date_time::Jun;
30 using date_time::Jul;
31 using date_time::Aug;
32 using date_time::Sep;
33 using date_time::Oct;
34 using date_time::Nov;
35 using date_time::Dec;
36 using date_time::NotAMonth;
37 using date_time::NumMonths;
38
39 //! Exception thrown if a greg_month is constructed with a value out of range
40 struct BOOST_SYMBOL_VISIBLE bad_month : public std::out_of_range
41 {
42 bad_month() : std::out_of_range(std::string("Month number is out of range 1..12")) {}
43 };
44 //! Build a policy class for the greg_month_rep
45 typedef CV::simple_exception_policy<unsigned short, 1, 12, bad_month> greg_month_policies;
46 //! A constrained range that implements the gregorian_month rules
47 typedef CV::constrained_value<greg_month_policies> greg_month_rep;
48
49
50 //! Wrapper class to represent months in gregorian based calendar
51 class BOOST_SYMBOL_VISIBLE greg_month : public greg_month_rep {
52 public:
53 typedef date_time::months_of_year month_enum;
54
55 //! Construct a month from the months_of_year enumeration
56 BOOST_CXX14_CONSTEXPR greg_month(month_enum theMonth) :
57 greg_month_rep(static_cast<greg_month_rep::value_type>(theMonth)) {}
58 //! Construct from a short value
59 BOOST_CXX14_CONSTEXPR greg_month(value_type theMonth) : greg_month_rep(theMonth) {}
60 //! Convert the value back to a short
61 BOOST_CXX14_CONSTEXPR operator value_type() const {return value_;}
62 //! Returns month as number from 1 to 12
63 BOOST_CXX14_CONSTEXPR value_type as_number() const {return value_;}
64 BOOST_CXX14_CONSTEXPR month_enum as_enum() const {return static_cast<month_enum>(value_);}
65
66 //! Returns 3 char english string for the month ex: Jan, Feb, Mar, Apr
67 const char*
68 as_short_string() const
69 {
70 static const char* const short_month_names[NumMonths]
71 = {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec", "NAM"};
72 return short_month_names[value_-1];
73 }
74
75 //! Returns full name of month as string in english ex: January, February
76 const char*
77 as_long_string() const
78 {
79 static const char* const long_month_names[NumMonths]
80 = {"January","February","March","April","May","June","July","August",
81 "September","October","November","December","NotAMonth"};
82 return long_month_names[value_-1];
83 }
84
85#ifndef BOOST_NO_STD_WSTRING
86
87 //! Returns 3 wchar_t english string for the month ex: Jan, Feb, Mar, Apr
88 const wchar_t*
89 as_short_wstring() const
90 {
91 static const wchar_t* const w_short_month_names[NumMonths]
92 = {L"Jan",L"Feb",L"Mar",L"Apr",L"May",L"Jun",L"Jul",L"Aug",L"Sep",L"Oct",
93 L"Nov",L"Dec",L"NAM"};
94 return w_short_month_names[value_-1];
95 }
96
97 //! Returns full name of month as wchar_t string in english ex: January, February
98 const wchar_t*
99 as_long_wstring() const
100 {
101 static const wchar_t* const w_long_month_names[NumMonths]
102 = {L"January",L"February",L"March",L"April",L"May",L"June",L"July",L"August",
103 L"September",L"October",L"November",L"December",L"NotAMonth"};
104 return w_long_month_names[value_-1];
105 }
106
107#endif // BOOST_NO_STD_WSTRING
108
109 /* parameterized as_*_string functions are intended to be called
110 * from a template function: "... as_short_string(charT c='\0');" */
111 const char* as_short_string(char) const
112 {
113 return as_short_string();
114 }
115 const char* as_long_string(char) const
116 {
117 return as_long_string();
118 }
119#ifndef BOOST_NO_STD_WSTRING
120 const wchar_t* as_short_string(wchar_t) const
121 {
122 return as_short_wstring();
123 }
124 const wchar_t* as_long_string(wchar_t) const
125 {
126 return as_long_wstring();
127 }
128#endif // BOOST_NO_STD_WSTRING
129 };
130
131} } //namespace gregorian
132
133#endif
134

source code of boost/libs/date_time/include/boost/date_time/gregorian/greg_month.hpp