Struct sp_std::num::NonZeroU8

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

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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>());

Implementations

impl NonZeroU8[−]

pub const unsafe fn new_unchecked(n: u8) -> NonZeroU8[−]

Creates a non-zero without checking the value.

Safety

The value must not be zero.

pub const fn new(n: u8) -> Option<NonZeroU8>[−]

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

pub const fn get(self) -> u8[−]

Returns the value as a primitive type.

impl NonZeroU8[−]

pub const fn leading_zeros(self) -> u32[−]

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

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);

pub const fn trailing_zeros(self) -> u32[−]

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

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);

impl NonZeroU8[−]

pub const fn is_power_of_two(self) -> bool[−]

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

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());

Trait Implementations

impl Binary for NonZeroU8[+]

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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl BitOr<NonZeroU8> for u8[+]

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type Output = NonZeroU8

The resulting type after applying the | operator.

pub fn bitor(self, rhs: NonZeroU8) -> <u8 as BitOr<NonZeroU8>>::Output[−]

Performs the | operation.

impl BitOr<NonZeroU8> for NonZeroU8[+]

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type Output = NonZeroU8

The resulting type after applying the | operator.

pub fn bitor(self, rhs: NonZeroU8) -> <NonZeroU8 as BitOr<NonZeroU8>>::Output[−]

Performs the | operation.

impl BitOr<u8> for NonZeroU8[+]

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type Output = NonZeroU8

The resulting type after applying the | operator.

pub fn bitor(self, rhs: u8) -> <NonZeroU8 as BitOr<u8>>::Output[−]

Performs the | operation.

impl BitOrAssign<NonZeroU8> for NonZeroU8[+]

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pub fn bitor_assign(&mut self, rhs: NonZeroU8)[−]

Performs the |= operation.

impl BitOrAssign<u8> for NonZeroU8[+]

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pub fn bitor_assign(&mut self, rhs: u8)[−]

Performs the |= operation.

impl Clone for NonZeroU8[+]

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pub fn clone(&self) -> NonZeroU8[−]

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Copy for NonZeroU8

impl Debug for NonZeroU8[+]

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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Display for NonZeroU8[+]

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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Div<NonZeroU8> for u8[+]

type Output = u8

The resulting type after applying the / operator.

pub fn div(self, other: NonZeroU8) -> u8[−]

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

impl Eq for NonZeroU8

impl From<NonZeroU8> for NonZeroUsize[+]

Converts NonZeroU8 to NonZeroUsize losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroUsize[−]

Performs the conversion.

impl From<NonZeroU8> for u8[+]

pub fn from(nonzero: NonZeroU8) -> u8[−]

Converts a NonZeroU8 into an u8

impl From<NonZeroU8> for NonZeroIsize[+]

Converts NonZeroU8 to NonZeroIsize losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroIsize[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroI128[+]

Converts NonZeroU8 to NonZeroI128 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroI128[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroI64[+]

Converts NonZeroU8 to NonZeroI64 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroI64[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroU128[+]

Converts NonZeroU8 to NonZeroU128 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroU128[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroU16[+]

Converts NonZeroU8 to NonZeroU16 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroU16[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroI32[+]

Converts NonZeroU8 to NonZeroI32 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroI32[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroU64[+]

Converts NonZeroU8 to NonZeroU64 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroU64[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroU32[+]

Converts NonZeroU8 to NonZeroU32 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroU32[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroI16[+]

Converts NonZeroU8 to NonZeroI16 losslessly.

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pub fn from(small: NonZeroU8) -> NonZeroI16[−]

Performs the conversion.

impl FromStr for NonZeroU8[+]

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type Err = ParseIntError

The associated error which can be returned from parsing.

pub fn from_str(src: &str) -> Result<NonZeroU8, <NonZeroU8 as FromStr>::Err>[−]

Parses a string s to return a value of this type.

impl Hash for NonZeroU8[+]

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pub fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, [−]

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl LowerHex for NonZeroU8[+]

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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Octal for NonZeroU8[+]

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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Ord for NonZeroU8[+]

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pub fn cmp(&self, other: &NonZeroU8) -> Ordering[−]

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<NonZeroU8> for NonZeroU8[+]

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pub fn eq(&self, other: &NonZeroU8) -> bool[−]

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

pub fn ne(&self, other: &NonZeroU8) -> bool[−]

This method tests for !=.

impl PartialOrd<NonZeroU8> for NonZeroU8[+]

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pub fn partial_cmp(&self, other: &NonZeroU8) -> Option<Ordering>[−]

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

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

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

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

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

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

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

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

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

impl Rem<NonZeroU8> for u8[+]

type Output = u8

The resulting type after applying the % operator.

pub fn rem(self, other: NonZeroU8) -> u8[−]

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

impl StructuralEq for NonZeroU8

impl StructuralPartialEq for NonZeroU8

impl TryFrom<NonZeroI128> for NonZeroU8[+]

Attempts to convert NonZeroI128 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI128>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroI16> for NonZeroU8[+]

Attempts to convert NonZeroI16 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI16>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroI32> for NonZeroU8[+]

Attempts to convert NonZeroI32 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI32>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroI64> for NonZeroU8[+]

Attempts to convert NonZeroI64 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI64>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroI8> for NonZeroU8[+]

Attempts to convert NonZeroI8 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI8>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroIsize> for NonZeroU8[+]

Attempts to convert NonZeroIsize to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroIsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroIsize>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroU128> for NonZeroU8[+]

Attempts to convert NonZeroU128 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU128>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroU16> for NonZeroU8[+]

Attempts to convert NonZeroU16 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU16>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroU32> for NonZeroU8[+]

Attempts to convert NonZeroU32 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU32>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroU64> for NonZeroU8[+]

Attempts to convert NonZeroU64 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU64>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroU8> for NonZeroI8[+]

Attempts to convert NonZeroU8 to NonZeroI8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU8
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU8>>::Error>[−]

Performs the conversion.

impl TryFrom<NonZeroUsize> for NonZeroU8[+]

Attempts to convert NonZeroUsize to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroUsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroUsize>>::Error>[−]

Performs the conversion.

impl TryFrom<u8> for NonZeroU8[+]

Attempts to convert u8 to NonZeroU8.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: u8
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<u8>>::Error>[−]

Performs the conversion.

impl UpperHex for NonZeroU8[+]

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pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.