pub enum Weekday {
Mon = 0,
Tue = 1,
Wed = 2,
Thu = 3,
Fri = 4,
Sat = 5,
Sun = 6,
}
Expand description
The day of week.
The order of the days of week depends on the context.
(This is why this type does not implement PartialOrd
or Ord
traits.)
One should prefer *_from_monday
or *_from_sunday
methods to get the correct result.
§Example
use chrono::Weekday;
let monday = "Monday".parse::<Weekday>().unwrap();
assert_eq!(monday, Weekday::Mon);
let sunday = Weekday::try_from(6).unwrap();
assert_eq!(sunday, Weekday::Sun);
assert_eq!(sunday.num_days_from_monday(), 6); // starts counting with Monday = 0
assert_eq!(sunday.number_from_monday(), 7); // starts counting with Monday = 1
assert_eq!(sunday.num_days_from_sunday(), 0); // starts counting with Sunday = 0
assert_eq!(sunday.number_from_sunday(), 1); // starts counting with Sunday = 1
assert_eq!(sunday.succ(), monday);
assert_eq!(sunday.pred(), Weekday::Sat);
Variants§
Mon = 0
Monday.
Tue = 1
Tuesday.
Wed = 2
Wednesday.
Thu = 3
Thursday.
Fri = 4
Friday.
Sat = 5
Saturday.
Sun = 6
Sunday.
Implementations§
source§impl Weekday
impl Weekday
sourcepub const fn succ(&self) -> Weekday
pub const fn succ(&self) -> Weekday
The next day in the week.
w : | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|---|
w.succ() : | Tue | Wed | Thu | Fri | Sat | Sun | Mon |
sourcepub const fn pred(&self) -> Weekday
pub const fn pred(&self) -> Weekday
The previous day in the week.
w : | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|---|
w.pred() : | Sun | Mon | Tue | Wed | Thu | Fri | Sat |
sourcepub const fn number_from_monday(&self) -> u32
pub const fn number_from_monday(&self) -> u32
Returns a day-of-week number starting from Monday = 1. (ISO 8601 weekday number)
w : | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|---|
w.number_from_monday() : | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
sourcepub const fn number_from_sunday(&self) -> u32
pub const fn number_from_sunday(&self) -> u32
Returns a day-of-week number starting from Sunday = 1.
w : | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|---|
w.number_from_sunday() : | 2 | 3 | 4 | 5 | 6 | 7 | 1 |
sourcepub const fn num_days_from_monday(&self) -> u32
pub const fn num_days_from_monday(&self) -> u32
Returns a day-of-week number starting from Monday = 0.
w : | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|---|
w.num_days_from_monday() : | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
§Example
// MTWRFSU is occasionally used as a single-letter abbreviation of the weekdays.
// Use `num_days_from_monday` to index into the array.
const MTWRFSU: [char; 7] = ['M', 'T', 'W', 'R', 'F', 'S', 'U'];
let today = Local::now().weekday();
println!("{}", MTWRFSU[today.num_days_from_monday() as usize]);
sourcepub const fn num_days_from_sunday(&self) -> u32
pub const fn num_days_from_sunday(&self) -> u32
Returns a day-of-week number starting from Sunday = 0.
w : | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
---|---|---|---|---|---|---|---|
w.num_days_from_sunday() : | 1 | 2 | 3 | 4 | 5 | 6 | 0 |
Trait Implementations§
source§impl<'de> Deserialize<'de> for Weekday
impl<'de> Deserialize<'de> for Weekday
source§fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where
D: Deserializer<'de>,
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>where
D: Deserializer<'de>,
source§impl FromPrimitive for Weekday
impl FromPrimitive for Weekday
Any weekday can be represented as an integer from 0 to 6, which equals to
Weekday::num_days_from_monday
in this implementation.
Do not heavily depend on this though; use explicit methods whenever possible.
source§fn from_i64(n: i64) -> Option<Weekday>
fn from_i64(n: i64) -> Option<Weekday>
i64
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_u64(n: u64) -> Option<Weekday>
fn from_u64(n: u64) -> Option<Weekday>
u64
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_isize(n: isize) -> Option<Self>
fn from_isize(n: isize) -> Option<Self>
isize
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_i8(n: i8) -> Option<Self>
fn from_i8(n: i8) -> Option<Self>
i8
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_i16(n: i16) -> Option<Self>
fn from_i16(n: i16) -> Option<Self>
i16
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_i32(n: i32) -> Option<Self>
fn from_i32(n: i32) -> Option<Self>
i32
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_i128(n: i128) -> Option<Self>
fn from_i128(n: i128) -> Option<Self>
i128
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned. Read moresource§fn from_usize(n: usize) -> Option<Self>
fn from_usize(n: usize) -> Option<Self>
usize
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_u8(n: u8) -> Option<Self>
fn from_u8(n: u8) -> Option<Self>
u8
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_u16(n: u16) -> Option<Self>
fn from_u16(n: u16) -> Option<Self>
u16
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_u32(n: u32) -> Option<Self>
fn from_u32(n: u32) -> Option<Self>
u32
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned.source§fn from_u128(n: u128) -> Option<Self>
fn from_u128(n: u128) -> Option<Self>
u128
to return an optional value of this type. If the
value cannot be represented by this type, then None
is returned. Read moresource§impl FromStr for Weekday
impl FromStr for Weekday
Parsing a str
into a Weekday
uses the format %A
.
§Example
use chrono::Weekday;
assert_eq!("Sunday".parse::<Weekday>(), Ok(Weekday::Sun));
assert!("any day".parse::<Weekday>().is_err());
The parsing is case-insensitive.
assert_eq!("mON".parse::<Weekday>(), Ok(Weekday::Mon));
Only the shortest form (e.g. sun
) and the longest form (e.g. sunday
) is accepted.
assert!("thurs".parse::<Weekday>().is_err());
source§impl PartialEq for Weekday
impl PartialEq for Weekday
source§impl TryFrom<u8> for Weekday
impl TryFrom<u8> for Weekday
Any weekday can be represented as an integer from 0 to 6, which equals to
Weekday::num_days_from_monday
in this implementation.
Do not heavily depend on this though; use explicit methods whenever possible.
impl Copy for Weekday
impl Eq for Weekday
impl StructuralPartialEq for Weekday
Auto Trait Implementations§
impl Freeze for Weekday
impl RefUnwindSafe for Weekday
impl Send for Weekday
impl Sync for Weekday
impl Unpin for Weekday
impl UnwindSafe for Weekday
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
T: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)