month/
lib.rs

1#[cfg(feature = "with-chrono")]
2mod chrono;
3mod iter;
4mod num;
5#[cfg(feature = "with-num-traits")]
6mod num_traits;
7#[cfg(feature = "with-serde")]
8mod serde;
9mod str;
10
11#[cfg(feature = "with-chrono")]
12pub use self::chrono::CHRONO_MONTHS;
13#[cfg(feature = "with-serde")]
14pub use self::serde::{serde_str, serde_u64};
15pub use iter::MonthIterator;
16
17#[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Debug, Copy, Clone)]
18#[repr(u8)]
19pub enum Month {
20    Jan = 1,
21    Feb = 2,
22    Mar = 3,
23    Apr = 4,
24    May = 5,
25    Jun = 6,
26    Jul = 7,
27    Aug = 8,
28    Sep = 9,
29    Oct = 10,
30    Nov = 11,
31    Dec = 12,
32}
33
34pub static MONTHS: &[Month] = &[
35    Month::Jan,
36    Month::Feb,
37    Month::Mar,
38    Month::Apr,
39    Month::May,
40    Month::Jun,
41    Month::Jul,
42    Month::Aug,
43    Month::Sep,
44    Month::Oct,
45    Month::Nov,
46    Month::Dec,
47];
48pub(crate) const MONTH_N_MIN: u8 = 1;
49pub(crate) const MONTH_N_MAX: u8 = 12;
50
51impl Month {
52    pub fn first() -> Self {
53        MONTHS[(MONTH_N_MIN - 1) as usize].to_owned()
54    }
55    pub fn last() -> Self {
56        MONTHS[(MONTH_N_MAX - 1) as usize].to_owned()
57    }
58
59    pub fn next(&self) -> Option<Self> {
60        if self == &Self::last() {
61            None
62        } else {
63            Some(MONTHS[(self.to_owned() as u8 + 1 - 1) as usize].to_owned())
64        }
65    }
66    pub fn prev(&self) -> Option<Self> {
67        if self == &Self::first() {
68            None
69        } else {
70            Some(MONTHS[(self.to_owned() as u8 - 1 - 1) as usize].to_owned())
71        }
72    }
73}
month/lib.rs

month/
lib.rs
