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

    #[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<core::num::NonZeroU8>>(), size_of::<u8>());

Run

## Implementations

### `impl NonZeroU8`[src]

#### `pub const unsafe fn new_unchecked(n: u8) -> Self` 1.28.0 (const: 1.34.0)[src]

Creates a non-zero without checking the value.

# Safety

The value must not be zero.

#### `pub const fn new(n: u8) -> Option<Self>`1.28.0 (const: 1.47.0)[src]

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

#### `pub const fn get(self) -> u8` 1.28.0 (const: 1.34.0)[src]

Returns the value as a primitive type.

### `impl NonZeroU8`[src]

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

🔬 This is a nightly-only experimental API. (`nonzero_leading_trailing_zeros` #79143)

Returns the number of leading zeros in the binary representation of `self`.

On many architectures, this function can perform better than `leading_zeros()` on the underlying integer type, as special handling of zero can be avoided.

# Examples

Basic usage:

    #![feature(nonzero_leading_trailing_zeros)]
    let n = std::num::NonZeroU8::new(u8::MAX).unwrap();

    assert_eq!(n.leading_zeros(), 0);

Run

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

🔬 This is a nightly-only experimental API. (`nonzero_leading_trailing_zeros` #79143)

Returns the number of trailing zeros in the binary representation of `self`.

On many architectures, this function can perform better than `trailing_zeros()` on the underlying integer type, as special handling of zero can be avoided.

# Examples

Basic usage:

    #![feature(nonzero_leading_trailing_zeros)]
    let n = std::num::NonZeroU8::new(0b0101000).unwrap();

    assert_eq!(n.trailing_zeros(), 3);

Run

### `impl NonZeroU8`[src]

#### `pub const fn is_power_of_two(self) -> bool`[src]

🔬 This is a nightly-only experimental API. (`nonzero_is_power_of_two` #81106)

Returns `true` if and only if `self == (1 << k)` for some `k`.

On many architectures, this function can perform better than `is_power_of_two()` on the underlying integer type, as special handling of zero can be avoided.

# Examples

Basic usage:

    #![feature(nonzero_is_power_of_two)]

    let eight = std::num::NonZeroU8::new(8).unwrap();
    assert!(eight.is_power_of_two());
    let ten = std::num::NonZeroU8::new(10).unwrap();
    assert!(!ten.is_power_of_two());

Run

## Trait Implementations

### `impl Binary for NonZeroU8`[src]

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

Formats the value using the given formatter.

### `impl BitOr<NonZeroU8> for NonZeroU8` 1.45.0[src]

#### `type Output = Self`

The resulting type after applying the `|` operator.

#### `fn bitor(self, rhs: Self) -> Self::Output`[src]

Performs the `|` operation. Read more

### `impl BitOr<NonZeroU8> for u8` 1.45.0[src]

#### `type Output = NonZeroU8`

The resulting type after applying the `|` operator.

#### `fn bitor(self, rhs: NonZeroU8) -> Self::Output`[src]

Performs the `|` operation. Read more

### `impl BitOr<u8> for NonZeroU8` 1.45.0[src]

#### `type Output = Self`

The resulting type after applying the `|` operator.

#### `fn bitor(self, rhs: u8) -> Self::Output`[src]

Performs the `|` operation. Read more

### `impl BitOrAssign<NonZeroU8> for NonZeroU8` 1.45.0[src]

#### `fn bitor_assign(&mut self, rhs: Self)`[src]

Performs the `|=` operation. Read more

### `impl BitOrAssign<u8> for NonZeroU8` 1.45.0[src]

#### `fn bitor_assign(&mut self, rhs: u8)`[src]

Performs the `|=` operation. 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 Copy for NonZeroU8`[src]

### `impl Debug for NonZeroU8`[src]

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

Formats the value using the given formatter. Read more

### `impl Display for NonZeroU8`[src]

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

Formats the value using the given formatter. Read more

### `impl Div<NonZeroU8> for u8` 1.51.0[src]

#### `type Output = u8`

The resulting type after applying the `/` operator.

#### `fn div(self, other: NonZeroU8) -> u8`[src]

This operation rounds towards zero, truncating any fractional part of the exact result, and cannot panic.

### `impl Eq for NonZeroU8`[src]

### `impl From<NonZeroU8> for u8` 1.31.0[src]

#### `fn from(nonzero: NonZeroU8) -> Self`[src]

Converts a `NonZeroU8` into an `u8`

### `impl From<NonZeroU8> for NonZeroU16` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroU16` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroIsize` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroIsize` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroU32` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroU32` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroU64` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroU64` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroU128` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroU128` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroUsize` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroUsize` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroI16` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroI16` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroI32` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroI32` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroI64` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroI64` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl From<NonZeroU8> for NonZeroI128` 1.41.0[src]

Converts `NonZeroU8` to `NonZeroI128` losslessly.

#### `fn from(small: NonZeroU8) -> Self`[src]

Performs the conversion.

### `impl FromStr for NonZeroU8` 1.35.0[src]

#### `type Err = ParseIntError`

The associated error which can be returned from parsing.

#### `fn from_str(src: &str) -> Result<Self, Self::Err>`[src]

Parses a string `s` to return a value of this type. Read more

### `impl Hash for NonZeroU8`[src]

#### `fn hash<__H: Hasher>(&self, state: &mut __H)`[src]

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

#### `fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized,` 1.3.0[src]

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

### `impl LowerHex for NonZeroU8`[src]

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

Formats the value using the given formatter.

### `impl Octal for NonZeroU8`[src]

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

Formats the value using the given formatter.

### `impl Ord for NonZeroU8`[src]

#### `fn cmp(&self, other: &NonZeroU8) -> Ordering`[src]

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

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

Compares and returns the maximum of two values. Read more

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

Compares and returns the minimum of two values. Read more

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

Restrict a value to a certain interval. Read more

### `impl PartialEq<NonZeroU8> for NonZeroU8`[src]

#### `fn eq(&self, other: &NonZeroU8) -> bool`[src]

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

#### `fn ne(&self, other: &NonZeroU8) -> bool`[src]

This method tests for `!=`.

### `impl PartialOrd<NonZeroU8> for NonZeroU8`[src]

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

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

#### `#[must_use]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]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]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]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 Rem<NonZeroU8> for u8` 1.51.0[src]

#### `type Output = u8`

The resulting type after applying the `%` operator.

#### `fn rem(self, other: NonZeroU8) -> u8`[src]

This operation satisfies `n % d == n - (n / d) * d`, and cannot panic.

### `impl StructuralEq for NonZeroU8`[src]

### `impl StructuralPartialEq for NonZeroU8`[src]

### `impl TryFrom<NonZeroI128> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroI128` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroI128) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroI16> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroI16` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroI16) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroI32> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroI32` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroI32) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroI64> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroI64` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroI64) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroI8> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroI8` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroI8) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroIsize> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroIsize` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroIsize) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroU128> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroU128` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroU128) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroU16> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroU16` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroU16) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroU32> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroU32` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroU32) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroU64> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroU64` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroU64) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroU8> for NonZeroI8` 1.49.0[src]

Attempts to convert `NonZeroU8` to `NonZeroI8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroU8) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<NonZeroUsize> for NonZeroU8` 1.49.0[src]

Attempts to convert `NonZeroUsize` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: NonZeroUsize) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl TryFrom<u8> for NonZeroU8` 1.46.0[src]

Attempts to convert `u8` to `NonZeroU8`.

#### `type Error = TryFromIntError`

The type returned in the event of a conversion error.

#### `fn try_from(value: u8) -> Result<Self, Self::Error>`[src]

Performs the conversion.

### `impl UpperHex for NonZeroU8`[src]

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

Formats the value using the given formatter.

## Auto Trait Implementations

### `impl Send for NonZeroU8`[src]

### `impl Sync for NonZeroU8`[src]

### `impl Unpin for NonZeroU8`[src]

## 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`[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, 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(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.