Struct concordium_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<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

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:

let n = std::num::NonZeroU8::new(u8::MAX).unwrap();

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

pub const fn trailing_zeros(self) -> u32

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:

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

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

Formats the value using the given formatter.

impl BitOr<NonZeroU8> for NonZeroU8

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

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

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

Performs the |= operation.

impl BitOrAssign<u8> for NonZeroU8

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

Performs the |= operation.

impl Clone for NonZeroU8

pub fn clone(&self) -> NonZeroU8

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for NonZeroU8

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

Formats the value using the given formatter.

impl Display for NonZeroU8

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

Formats the value using the given formatter.

impl From<NonZeroU8> for NonZeroI128

pub fn from(small: NonZeroU8) -> NonZeroI128

Converts NonZeroU8 to NonZeroI128 losslessly.

impl From<NonZeroU8> for NonZeroUsize

pub fn from(small: NonZeroU8) -> NonZeroUsize

Converts NonZeroU8 to NonZeroUsize losslessly.

impl From<NonZeroU8> for NonZeroIsize

pub fn from(small: NonZeroU8) -> NonZeroIsize

Converts NonZeroU8 to NonZeroIsize losslessly.

impl From<NonZeroU8> for NonZeroI32

pub fn from(small: NonZeroU8) -> NonZeroI32

Converts NonZeroU8 to NonZeroI32 losslessly.

impl From<NonZeroU8> for NonZeroU16

pub fn from(small: NonZeroU8) -> NonZeroU16

Converts NonZeroU8 to NonZeroU16 losslessly.

impl From<NonZeroU8> for u8

pub fn from(nonzero: NonZeroU8) -> u8

Converts a NonZeroU8 into an u8

impl From<NonZeroU8> for NonZeroU128

pub fn from(small: NonZeroU8) -> NonZeroU128

Converts NonZeroU8 to NonZeroU128 losslessly.

impl From<NonZeroU8> for NonZeroU64

pub fn from(small: NonZeroU8) -> NonZeroU64

Converts NonZeroU8 to NonZeroU64 losslessly.

impl From<NonZeroU8> for NonZeroU32

pub fn from(small: NonZeroU8) -> NonZeroU32

Converts NonZeroU8 to NonZeroU32 losslessly.

impl From<NonZeroU8> for NonZeroI16

pub fn from(small: NonZeroU8) -> NonZeroI16

Converts NonZeroU8 to NonZeroI16 losslessly.

impl From<NonZeroU8> for NonZeroI64

pub fn from(small: NonZeroU8) -> NonZeroI64

Converts NonZeroU8 to NonZeroI64 losslessly.

impl FromStr for NonZeroU8

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

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

Feeds this value into the given Hasher.

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

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

Formats the value using the given formatter.

impl Octal for NonZeroU8

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

Formats the value using the given formatter.

impl Ord for NonZeroU8

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

This method returns an Ordering between self and other.

#[must_use]

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

Compares and returns the maximum of two values.

#[must_use]

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

Compares and returns the minimum of two values.

#[must_use]

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<NonZeroU8> for NonZeroU8

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

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

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

#[must_use]

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

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

#[must_use]

fn le(&self, other: &Rhs) -> bool

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

#[must_use]

fn gt(&self, other: &Rhs) -> bool

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

#[must_use]

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 TryFrom<NonZeroI128> for NonZeroU8

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

Attempts to convert NonZeroI128 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroI16> for NonZeroU8

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

Attempts to convert NonZeroI16 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroI32> for NonZeroU8

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

Attempts to convert NonZeroI32 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroI64> for NonZeroU8

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

Attempts to convert NonZeroI64 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroI8> for NonZeroU8

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

Attempts to convert NonZeroI8 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroIsize> for NonZeroU8

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

Attempts to convert NonZeroIsize to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroU128> for NonZeroU8

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

Attempts to convert NonZeroU128 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroU16> for NonZeroU8

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

Attempts to convert NonZeroU16 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroU32> for NonZeroU8

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

Attempts to convert NonZeroU32 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroU64> for NonZeroU8

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

Attempts to convert NonZeroU64 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroU8> for NonZeroI8

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

Attempts to convert NonZeroU8 to NonZeroI8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZeroUsize> for NonZeroU8

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

Attempts to convert NonZeroUsize to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<u8> for NonZeroU8

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

Attempts to convert u8 to NonZeroU8.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl UpperHex for NonZeroU8

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

Formats the value using the given formatter.

impl Copy for NonZeroU8

impl Eq for NonZeroU8

impl StructuralEq for NonZeroU8

impl StructuralPartialEq for NonZeroU8