# Struct chrono::naive::IsoWeek [−] [src]

    pub struct IsoWeek { /* fields omitted */ }

ISO 8601 week.

This type, combined with `Weekday`, constitues the ISO 8601 week date. One can retrieve this type from the existing `Datelike` types via the `Datelike::iso_week` method.

## Implementations

### `impl IsoWeek` [src]

#### `pub fn year(&self) -> i32` [src]

Returns the year number for this ISO week.

# Example

    use chrono::{NaiveDate, Datelike, Weekday};

    let d = NaiveDate::from_isoywd(2015, 1, Weekday::Mon);
    assert_eq!(d.iso_week().year(), 2015);

This year number might not match the calendar year number. Continuing the example…

    assert_eq!(d.year(), 2014);
    assert_eq!(d, NaiveDate::from_ymd(2014, 12, 29));

#### `pub fn week(&self) -> u32` [src]

Returns the ISO week number starting from 1.

The return value ranges from 1 to 53. (The last week of year differs by years.)

# Example

    use chrono::{NaiveDate, Datelike, Weekday};

    let d = NaiveDate::from_isoywd(2015, 15, Weekday::Mon);
    assert_eq!(d.iso_week().week(), 15);

#### `pub fn week0(&self) -> u32` [src]

Returns the ISO week number starting from 0.

The return value ranges from 0 to 52. (The last week of year differs by years.)

# Example

    use chrono::{NaiveDate, Datelike, Weekday};

    let d = NaiveDate::from_isoywd(2015, 15, Weekday::Mon);
    assert_eq!(d.iso_week().week0(), 14);

## Trait Implementations

### `impl Clone for IsoWeek` [src]

#### `fn clone(&self) -> IsoWeek` [src]

Returns a copy of the value. Read more

#### `pub fn clone_from(&mut self, source: &Self)`1.0.0 [src]

Performs copy-assignment from `source`. Read more

### `impl Copy for IsoWeek` [src]

### `impl Debug for IsoWeek` [src]

The `Debug` output of the ISO week `w` is the same as `d.format("%G-W%V")` where `d` is any `NaiveDate` value in that week.

# Example

    use chrono::{NaiveDate, Datelike};

    assert_eq!(format!("{:?}", NaiveDate::from_ymd(2015,  9,  5).iso_week()), "2015-W36");
    assert_eq!(format!("{:?}", NaiveDate::from_ymd(   0,  1,  3).iso_week()), "0000-W01");
    assert_eq!(format!("{:?}", NaiveDate::from_ymd(9999, 12, 31).iso_week()), "9999-W52");

ISO 8601 requires an explicit sign for years before 1 BCE or after 9999 CE.

    assert_eq!(format!("{:?}", NaiveDate::from_ymd(    0,  1,  2).iso_week()),  "-0001-W52");
    assert_eq!(format!("{:?}", NaiveDate::from_ymd(10000, 12, 31).iso_week()), "+10000-W52");

#### `fn fmt(&self, f: &mut Formatter<'_>) -> Result` [src]

Formats the value using the given formatter. Read more

### `impl Eq for IsoWeek` [src]

### `impl Ord for IsoWeek` [src]

#### `fn cmp(&self, other: &IsoWeek) -> Ordering` [src]

This method returns an `Ordering` between `self` and `other`. Read more

#### `#[must_use]pub fn max(self, other: Self) -> Self` 1.21.0 [src]

Compares and returns the maximum of two values. Read more

#### `#[must_use]pub fn min(self, other: Self) -> Self` 1.21.0 [src]

Compares and returns the minimum of two values. Read more

#### `#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self` 1.50.0 [src]

Restrict a value to a certain interval. Read more

### `impl PartialEq<IsoWeek> for IsoWeek` [src]

#### `fn eq(&self, other: &IsoWeek) -> bool` [src]

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `fn ne(&self, other: &IsoWeek) -> bool` [src]

This method tests for `!=`.

### `impl PartialOrd<IsoWeek> for IsoWeek` [src]

#### `fn partial_cmp(&self, other: &IsoWeek) -> Option<Ordering>` [src]

This method returns an ordering between `self` and `other` values if one exists. Read more

#### `#[must_use]pub fn lt(&self, other: &Rhs) -> bool` 1.0.0 [src]

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

#### `#[must_use]pub fn le(&self, other: &Rhs) -> bool` 1.0.0 [src]

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

#### `#[must_use]pub fn gt(&self, other: &Rhs) -> bool` 1.0.0 [src]

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

#### `#[must_use]pub fn ge(&self, other: &Rhs) -> bool` 1.0.0 [src]

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

### `impl StructuralEq for IsoWeek` [src]

### `impl StructuralPartialEq for IsoWeek` [src]

## Auto Trait Implementations

### `impl RefUnwindSafe for IsoWeek`

### `impl Send for IsoWeek`

### `impl Sync for IsoWeek`

### `impl Unpin for IsoWeek`

### `impl UnwindSafe for IsoWeek`

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T` [src]

#### `pub fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U` [src]

Performs the conversion.

### `impl<T> ToOwned for T where
T: Clone,` [src]

#### `type Owned = T`

The resulting type after obtaining ownership.

#### `pub fn to_owned(&self) -> T` [src]

Creates owned data from borrowed data, usually by cloning. Read more

#### `pub fn clone_into(&self, target: &mut T)` [src]

🔬 This is a nightly-only experimental API. (`toowned_clone_into`)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

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

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>` [src]

Performs the conversion.