Enum icu_datetime::fields::Year

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#[repr(u8)]
pub enum Year { Calendar = 0, WeekOf = 1, Cyclic = 2, RelatedIso = 3, }
Expand description

An enum for the possible symbols of a year field in a date pattern.

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Calendar = 0

Field symbol for calendar year (numeric).

In most cases the length of this field specifies the minimum number of digits to display, zero-padded as necessary. For most use cases, Year::Calendar or Year::WeekOf should be adequate.

This field symbol is represented by the character y in a date formatting pattern string.

For more details, see documentation on date field symbols.

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WeekOf = 1

Field symbol for year in “week of year”.

This works for “week of year” based calendars in which the year transition occurs on a week boundary; may differ from calendar year Year::Calendar near a year transition. This numeric year designation is used in conjunction with Week::WeekOfYear, but can be used in non-Gregorian based calendar systems where week date processing is desired. The field length is interpreted in the same way as for Year::Calendar.

This field symbol is represented by the character Y in a date formatting pattern string.

For more details, see documentation on date field symbols.

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Cyclic = 2

Field symbol for cyclic year; used in calendars where years are tracked in cycles, such as the Chinese or Dangi calendars.

This field symbol is represented by the character U in a date formatting pattern string.

For more details, see documentation on date field symbols.

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RelatedIso = 3

Field symbol for related ISO; some calendars which use different year numbering than ISO, or no year numbering, may express years in an ISO year corresponding to a calendar year.

This field symbol is represented by the character r in a date formatting pattern string.

For more details, see documentation on date field symbols.

Implementations§

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impl Year

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pub(crate) fn new_from_u8(value: u8) -> Option<Self>

Attempt to construct the value from its corresponding integer, returning None if not possible

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impl Year

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pub(crate) fn idx(self) -> u8

Retrieves an index of the field variant.

§Examples
use icu::datetime::fields::Month;

assert_eq!(Month::StandAlone::idx(), 1);
§Stability

This is mostly useful for serialization, and does not guarantee index stability between ICU4X versions.

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pub(crate) fn from_idx(idx: u8) -> Result<Self, SymbolError>

Retrieves a field variant from an index.

§Examples
use icu::datetime::fields::Month;

assert_eq!(Month::from_idx(0), Month::Format);
§Stability

This is mostly useful for serialization, and does not guarantee index stability between ICU4X versions.

Trait Implementations§

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impl AsULE for Year

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type ULE = YearULE

The ULE type corresponding to Self. Read more
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fn to_unaligned(self) -> Self::ULE

Converts from Self to Self::ULE. Read more
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fn from_unaligned(other: Self::ULE) -> Self

Converts from Self::ULE to Self. Read more
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impl Clone for Year

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fn clone(&self) -> Year

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Year

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl From<Year> for FieldSymbol

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fn from(input: Year) -> Self

Converts to this type from the input type.
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impl From<Year> for char

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fn from(input: Year) -> char

Converts to this type from the input type.
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impl Ord for Year

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fn cmp(&self, other: &Year) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for Year

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fn eq(&self, other: &Year) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Year

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fn partial_cmp(&self, other: &Year) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl TryFrom<char> for Year

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type Error = SymbolError

The type returned in the event of a conversion error.
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fn try_from(ch: char) -> Result<Self, Self::Error>

Performs the conversion.
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impl<'a> Yokeable<'a> for Year
where Self: Sized,

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type Output = Year

This type MUST be Self with the 'static replaced with 'a, i.e. Self<'a>
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fn transform(&self) -> &Self::Output

This method must cast self between &'a Self<'static> and &'a Self<'a>. Read more
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fn transform_owned(self) -> Self::Output

This method must cast self between Self<'static> and Self<'a>. Read more
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unsafe fn make(this: Self::Output) -> Self

This method can be used to cast away Self<'a>’s lifetime. Read more
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fn transform_mut<F>(&'a mut self, f: F)
where F: 'static + for<'b> FnOnce(&'b mut Self::Output),

This method must cast self between &'a mut Self<'static> and &'a mut Self<'a>, and pass it to f. Read more
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impl<'zf> ZeroFrom<'zf, Year> for Year

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fn zero_from(this: &'zf Self) -> Self

Clone the other C into a struct that may retain references into C.
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impl<'a> ZeroMapKV<'a> for Year

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type Container = ZeroVec<'a, Year>

The container that can be used with this type: ZeroVec or VarZeroVec.
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type Slice = ZeroSlice<Year>

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type GetType = YearULE

The type produced by Container::get() Read more
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type OwnedType = Year

The type produced by Container::replace() and Container::remove(), also used during deserialization. If Self is human readable serialized, deserializing to Self::OwnedType should produce the same value once passed through Self::owned_as_self() Read more
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impl Copy for Year

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impl Eq for Year

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impl StructuralPartialEq for Year

Auto Trait Implementations§

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impl Freeze for Year

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impl RefUnwindSafe for Year

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impl Send for Year

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impl Sync for Year

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impl Unpin for Year

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impl UnwindSafe for Year

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T