time/
rand08.rs

1//! Implementation of [`Distribution`] for various structs.
2
3use rand08::Rng;
4use rand08::distributions::{Distribution, Standard};
5
6use crate::{
7    Date, Duration, Month, OffsetDateTime, PrimitiveDateTime, Time, Timestamp, UtcDateTime,
8    UtcOffset, Weekday,
9};
10
11impl Distribution<Time> for Standard {
12    #[inline]
13    fn sample<R>(&self, rng: &mut R) -> Time
14    where
15        R: Rng + ?Sized,
16    {
17        Time::from_hms_nanos_ranged(rng.r#gen(), rng.r#gen(), rng.r#gen(), rng.r#gen())
18    }
19}
20
21impl Distribution<Date> for Standard {
22    #[inline]
23    fn sample<R>(&self, rng: &mut R) -> Date
24    where
25        R: Rng + ?Sized,
26    {
27        // Safety: The Julian day number is in range.
28        unsafe {
29            Date::from_julian_day_unchecked(
30                rng.gen_range(Date::MIN.to_julian_day()..=Date::MAX.to_julian_day()),
31            )
32        }
33    }
34}
35
36impl Distribution<UtcOffset> for Standard {
37    #[inline]
38    fn sample<R>(&self, rng: &mut R) -> UtcOffset
39    where
40        R: Rng + ?Sized,
41    {
42        UtcOffset::from_hms_ranged(rng.r#gen(), rng.r#gen(), rng.r#gen())
43    }
44}
45
46impl Distribution<PrimitiveDateTime> for Standard {
47    #[inline]
48    fn sample<R>(&self, rng: &mut R) -> PrimitiveDateTime
49    where
50        R: Rng + ?Sized,
51    {
52        PrimitiveDateTime::new(Self.sample(rng), Self.sample(rng))
53    }
54}
55
56impl Distribution<UtcDateTime> for Standard {
57    #[inline]
58    fn sample<R>(&self, rng: &mut R) -> UtcDateTime
59    where
60        R: Rng + ?Sized,
61    {
62        UtcDateTime::new(Self.sample(rng), Self.sample(rng))
63    }
64}
65
66impl Distribution<OffsetDateTime> for Standard {
67    #[inline]
68    fn sample<R>(&self, rng: &mut R) -> OffsetDateTime
69    where
70        R: Rng + ?Sized,
71    {
72        let date_time: PrimitiveDateTime = Self.sample(rng);
73        date_time.assume_offset(Self.sample(rng))
74    }
75}
76
77impl Distribution<Timestamp> for Standard {
78    #[inline]
79    fn sample<R: Rng + ?Sized>(&self, rng: &mut R) -> Timestamp {
80        Timestamp::new_ranged(rng.r#gen(), rng.r#gen())
81    }
82}
83
84impl Distribution<Duration> for Standard {
85    #[inline]
86    fn sample<R>(&self, rng: &mut R) -> Duration
87    where
88        R: Rng + ?Sized,
89    {
90        Duration::new_ranged(rng.r#gen(), rng.r#gen())
91    }
92}
93
94impl Distribution<Weekday> for Standard {
95    #[inline]
96    fn sample<R>(&self, rng: &mut R) -> Weekday
97    where
98        R: Rng + ?Sized,
99    {
100        use Weekday::*;
101
102        match rng.gen_range(0u8..7) {
103            0 => Monday,
104            1 => Tuesday,
105            2 => Wednesday,
106            3 => Thursday,
107            4 => Friday,
108            5 => Saturday,
109            val => {
110                debug_assert!(val == 6);
111                Sunday
112            }
113        }
114    }
115}
116
117impl Distribution<Month> for Standard {
118    #[inline]
119    fn sample<R>(&self, rng: &mut R) -> Month
120    where
121        R: Rng + ?Sized,
122    {
123        use Month::*;
124        match rng.gen_range(1u8..=12) {
125            1 => January,
126            2 => February,
127            3 => March,
128            4 => April,
129            5 => May,
130            6 => June,
131            7 => July,
132            8 => August,
133            9 => September,
134            10 => October,
135            11 => November,
136            val => {
137                debug_assert!(val == 12);
138                December
139            }
140        }
141    }
142}
time/rand08.rs

time/
rand08.rs
