1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
#ifndef DATE_TIME_DATE_DURATION__
#define DATE_TIME_DATE_DURATION__
/* Copyright (c) 2002,2003 CrystalClear Software, Inc.
* Use, modification and distribution is subject to the
* Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
* Author: Jeff Garland, Bart Garst
* $Date: 2008-11-12 14:37:53 -0500 (Wed, 12 Nov 2008) $
*/
#include <boost/operators.hpp>
#include <boost/date_time/special_defs.hpp>
namespace boost {
namespace date_time {
//! Duration type with date level resolution
template<class duration_rep_traits>
class date_duration : private
boost::less_than_comparable1< date_duration< duration_rep_traits >
, boost::equality_comparable1< date_duration< duration_rep_traits >
, boost::addable1< date_duration< duration_rep_traits >
, boost::subtractable1< date_duration< duration_rep_traits >
, boost::dividable2< date_duration< duration_rep_traits >, int
> > > > >
{
public:
typedef typename duration_rep_traits::int_type duration_rep_type;
typedef typename duration_rep_traits::impl_type duration_rep;
//! Construct from a day count
explicit date_duration(duration_rep day_count) : days_(day_count) {};
/*! construct from special_values - only works when
* instantiated with duration_traits_adapted */
date_duration(special_values sv) :
days_(duration_rep::from_special(sv))
{}
// copy constructor required for addable<> & subtractable<>
//! Construct from another date_duration (Copy Constructor)
date_duration(const date_duration<duration_rep_traits>& other) :
days_(other.days_)
{}
//! returns days_ as it's instantiated type - used for streaming
duration_rep get_rep()const
{
return days_;
}
bool is_special()const
{
return days_.is_special();
}
//! returns days as value, not object.
duration_rep_type days() const
{
return duration_rep_traits::as_number(days_);
}
//! Returns the smallest duration -- used by to calculate 'end'
static date_duration unit()
{
return date_duration<duration_rep_traits>(1);
}
//! Equality
bool operator==(const date_duration& rhs) const
{
return days_ == rhs.days_;
}
//! Less
bool operator<(const date_duration& rhs) const
{
return days_ < rhs.days_;
}
/* For shortcut operators (+=, -=, etc) simply using
* "days_ += days_" may not work. If instantiated with
* an int_adapter, shortcut operators are not present,
* so this will not compile */
//! Subtract another duration -- result is signed
date_duration& operator-=(const date_duration& rhs)
{
//days_ -= rhs.days_;
days_ = days_ - rhs.days_;
return *this;
}
//! Add a duration -- result is signed
date_duration& operator+=(const date_duration& rhs)
{
days_ = days_ + rhs.days_;
return *this;
}
//! unary- Allows for dd = -date_duration(2); -> dd == -2
date_duration operator-() const
{
return date_duration<duration_rep_traits>(get_rep() * (-1));
}
//! Division operations on a duration with an integer.
date_duration& operator/=(int divisor)
{
days_ = days_ / divisor;
return *this;
}
//! return sign information
bool is_negative() const
{
return days_ < 0;
}
private:
duration_rep days_;
};
/*! Struct for instantiating date_duration with <b>NO</b> special values
* functionality. Allows for transparent implementation of either
* date_duration<long> or date_duration<int_adapter<long> > */
struct duration_traits_long
{
typedef long int_type;
typedef long impl_type;
static int_type as_number(impl_type i) { return i; };
};
/*! Struct for instantiating date_duration <b>WITH</b> special values
* functionality. Allows for transparent implementation of either
* date_duration<long> or date_duration<int_adapter<long> > */
struct duration_traits_adapted
{
typedef long int_type;
typedef boost::date_time::int_adapter<long> impl_type;
static int_type as_number(impl_type i) { return i.as_number(); };
};
} } //namspace date_time
#endif
|
Swift