std::num::NonZeroU8 - Rust
Description: API documentation for the Rust `NonZeroU8` struct in crate `std`.
Keywords: rust, rustlang, rust-lang, NonZeroU8

# 1.28.0[−][src]Struct std::num::NonZeroU8

    #[repr(transparent)]
    pub struct NonZeroU8(_);

An integer that is known not to equal zero.

This enables some memory layout optimization. For example, `Option<NonZeroU8>` is the same size as `u8`:

    use std::mem::size_of;
    assert_eq!(size_of::<Option<std::num::NonZeroU8>>(), size_of::<u8>());Run

## Methods

###

`impl NonZeroU8`

[src]

####

`pub const unsafe fn new_unchecked(n: u8) -> NonZeroU8`

[src]

Create a non-zero without checking the value.

# Safety

The value must not be zero.

####

`pub fn new(n: u8) -> Option<NonZeroU8>`

[src]

Create a non-zero if the given value is not zero.

####

`pub fn get(self) -> u8`

[src]

Returns the value as a primitive type.

## Trait Implementations

###

`impl From<NonZeroU8> for u8`

1.31.0
[src]

####

`fn from(nonzero: NonZeroU8) -> u8`

[src]

Performs the conversion.

###

`impl UpperHex for NonZeroU8`

[src]

####

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

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Formats the value using the given formatter.

###

`impl Octal for NonZeroU8`

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####

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

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Formats the value using the given formatter.

###

`impl Copy for NonZeroU8`

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###

`impl LowerHex for NonZeroU8`

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####

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

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Formats the value using the given formatter.

###

`impl Display for NonZeroU8`

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####

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

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Formats the value using the given formatter. Read more

###

`impl Hash for NonZeroU8`

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####

`fn hash<__H>(&self, state: &mut __H) where __H: Hasher,`

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Feeds this value into the given [`Hasher`]. Read more

####

`fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher,`

1.3.0
[src]

Feeds a slice of this type into the given [`Hasher`]. Read more

###

`impl Clone for NonZeroU8`

[src]

####

`fn clone(&self) -> NonZeroU8`

[src]

Returns a copy of the value. Read more

####

`fn clone_from(&mut self, source: &Self)`

1.0.0
[src]

Performs copy-assignment from `source`. Read more

###

`impl PartialOrd<NonZeroU8> for NonZeroU8`

[src]

####

`fn partial_cmp(&self, other: &NonZeroU8) -> Option<Ordering>`

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

####

`fn lt(&self, other: &NonZeroU8) -> bool`

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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: &NonZeroU8) -> bool`

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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: &NonZeroU8) -> bool`

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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: &NonZeroU8) -> bool`

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

###

`impl Ord for NonZeroU8`

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####

`fn cmp(&self, other: &NonZeroU8) -> Ordering`

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

####

`fn max(self, other: Self) -> Self`

1.21.0
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Compares and returns the maximum of two values. Read more

####

`fn min(self, other: Self) -> Self`

1.21.0
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Compares and returns the minimum of two values. Read more

###

`impl Binary for NonZeroU8`

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####

`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

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Formats the value using the given formatter.

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`impl Eq for NonZeroU8`

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`impl Debug for NonZeroU8`

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`fn fmt(&self, f: &mut Formatter) -> Result<(), Error>`

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Formats the value using the given formatter. Read more

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`impl PartialEq<NonZeroU8> for NonZeroU8`

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####

`fn eq(&self, other: &NonZeroU8) -> bool`

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

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`fn ne(&self, other: &NonZeroU8) -> bool`

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This method tests for `!=`.

## Auto Trait Implementations

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`impl Send for NonZeroU8`

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`impl Sync for NonZeroU8`

## Blanket Implementations

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`impl<T> From for T`

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####

`fn from(t: T) -> T`

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Performs the conversion.

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`impl<T, U> TryFrom for T where T: From<U>,`

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#### `type Error = !`

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`

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🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

###

`impl<T, U> TryInto for T where U: TryFrom<T>,`

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

🔬 This is a nightly-only experimental API. (`try_from` #33417)

The type returned in the event of a conversion error.

####

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`

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🔬 This is a nightly-only experimental API. (`try_from` #33417)

Performs the conversion.

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

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`fn into(self) -> U`

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Performs the conversion.

###

`impl<T> Borrow for T where T: ?Sized,`

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####
ⓘImportant traits for &'_ mut I

### Important traits for &'_ mut I

`impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`

`fn borrow(&self) -> &T`

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Immutably borrows from an owned value. Read more

###

`impl<T> BorrowMut for T where T: ?Sized,`

[src]

####
ⓘImportant traits for &'_ mut I

### Important traits for &'_ mut I

`impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W`

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

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Mutably borrows from an owned value. Read more

###

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

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####

`fn get_type_id(&self) -> TypeId`

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🔬 This is a nightly-only experimental API. (`get_type_id` #27745)

this method will likely be replaced by an associated static

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

###

`impl<T> ToOwned for T where T: Clone,`

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#### `type Owned = T`

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`fn to_owned(&self) -> T`

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

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`fn clone_into(&self, target: &mut T)`

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🔬 This is a nightly-only experimental API. (`toowned_clone_into` #41263)

recently added

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

###

`impl<T> ToString for T where T: Display + ?Sized,`

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`fn to_string(&self) -> String`

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Converts the given value to a `String`. Read more

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