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]
impl NonZeroU8[src]impl NonZeroU8[src]
impl NonZeroU8[src]pub const fn leading_zeros(self) -> u321.53.0 (const: 1.53.0)[src]
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);Run
pub const fn trailing_zeros(self) -> u321.53.0 (const: 1.53.0)[src]
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);Run
impl NonZeroU8[src]
impl NonZeroU8[src]pub const fn is_power_of_two(self) -> bool[src]
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 BitOrAssign<NonZeroU8> for NonZeroU81.45.0[src]
impl BitOrAssign<NonZeroU8> for NonZeroU81.45.0[src]fn bitor_assign(&mut self, rhs: Self)[src]
impl BitOrAssign<u8> for NonZeroU81.45.0[src]
impl BitOrAssign<u8> for NonZeroU81.45.0[src]fn bitor_assign(&mut self, rhs: u8)[src]
impl Clone for NonZeroU8[src]
impl Clone for NonZeroU8[src]fn clone(&self) -> NonZeroU8[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
impl From<NonZeroU8> for NonZeroU161.41.0[src]
impl From<NonZeroU8> for NonZeroU161.41.0[src]impl From<NonZeroU8> for NonZeroIsize1.41.0[src]
impl From<NonZeroU8> for NonZeroIsize1.41.0[src]impl From<NonZeroU8> for NonZeroU321.41.0[src]
impl From<NonZeroU8> for NonZeroU321.41.0[src]impl From<NonZeroU8> for NonZeroU641.41.0[src]
impl From<NonZeroU8> for NonZeroU641.41.0[src]impl From<NonZeroU8> for NonZeroU1281.41.0[src]
impl From<NonZeroU8> for NonZeroU1281.41.0[src]impl From<NonZeroU8> for NonZeroUsize1.41.0[src]
impl From<NonZeroU8> for NonZeroUsize1.41.0[src]impl From<NonZeroU8> for NonZeroI161.41.0[src]
impl From<NonZeroU8> for NonZeroI161.41.0[src]impl From<NonZeroU8> for NonZeroI321.41.0[src]
impl From<NonZeroU8> for NonZeroI321.41.0[src]impl From<NonZeroU8> for NonZeroI641.41.0[src]
impl From<NonZeroU8> for NonZeroI641.41.0[src]impl From<NonZeroU8> for NonZeroI1281.41.0[src]
impl From<NonZeroU8> for NonZeroI1281.41.0[src]impl PartialOrd<NonZeroU8> for NonZeroU8[src]
impl PartialOrd<NonZeroU8> for NonZeroU8[src]impl TryFrom<NonZeroI128> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroI128> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroI128) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroI128 to NonZeroU8.
impl TryFrom<NonZeroI16> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroI16> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroI16) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroI16 to NonZeroU8.
impl TryFrom<NonZeroI32> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroI32> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroI32) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroI32 to NonZeroU8.
impl TryFrom<NonZeroI64> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroI64> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroI64) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroI64 to NonZeroU8.
impl TryFrom<NonZeroIsize> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroIsize> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroIsize) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroIsize to NonZeroU8.
impl TryFrom<NonZeroU128> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroU128> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroU128) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroU128 to NonZeroU8.
impl TryFrom<NonZeroU16> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroU16> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroU16) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroU16 to NonZeroU8.
impl TryFrom<NonZeroU32> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroU32) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroU32 to NonZeroU8.
impl TryFrom<NonZeroU64> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroU64> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroU64) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroU64 to NonZeroU8.
impl TryFrom<NonZeroUsize> for NonZeroU81.49.0[src]
impl TryFrom<NonZeroUsize> for NonZeroU81.49.0[src]type Error = TryFromIntError
The type returned in the event of a conversion error.
fn try_from(value: NonZeroUsize) -> Result<Self, Self::Error>[src]
Attempts to convert NonZeroUsize to NonZeroU8.