Struct core::num::NonZeroU32 1.28.0[−][src]
#[repr(transparent)]pub struct NonZeroU32(_);
An integer that is known not to equal zero.
This enables some memory layout optimization.
For example, Option<NonZeroU32>
is the same size as u32
:
use std::mem::size_of; assert_eq!(size_of::<Option<core::num::NonZeroU32>>(), size_of::<u32>());Run
Implementations
impl NonZeroU32
[src]
impl NonZeroU32
[src]impl NonZeroU32
[src]
impl NonZeroU32
[src]pub const fn leading_zeros(self) -> u32
1.53.0 (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::NonZeroU32::new(u32::MAX).unwrap(); assert_eq!(n.leading_zeros(), 0);Run
pub const fn trailing_zeros(self) -> u32
1.53.0 (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::NonZeroU32::new(0b0101000).unwrap(); assert_eq!(n.trailing_zeros(), 3);Run
impl NonZeroU32
[src]
impl NonZeroU32
[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::NonZeroU32::new(8).unwrap(); assert!(eight.is_power_of_two()); let ten = std::num::NonZeroU32::new(10).unwrap(); assert!(!ten.is_power_of_two());Run
Trait Implementations
impl BitOr<NonZeroU32> for NonZeroU32
1.45.0[src]
impl BitOr<NonZeroU32> for NonZeroU32
1.45.0[src]impl BitOr<NonZeroU32> for u32
1.45.0[src]
impl BitOr<NonZeroU32> for u32
1.45.0[src]type Output = NonZeroU32
The resulting type after applying the |
operator.
fn bitor(self, rhs: NonZeroU32) -> Self::Output
[src]
impl BitOr<u32> for NonZeroU32
1.45.0[src]
impl BitOr<u32> for NonZeroU32
1.45.0[src]impl BitOrAssign<NonZeroU32> for NonZeroU32
1.45.0[src]
impl BitOrAssign<NonZeroU32> for NonZeroU32
1.45.0[src]fn bitor_assign(&mut self, rhs: Self)
[src]
impl BitOrAssign<u32> for NonZeroU32
1.45.0[src]
impl BitOrAssign<u32> for NonZeroU32
1.45.0[src]fn bitor_assign(&mut self, rhs: u32)
[src]
impl Clone for NonZeroU32
[src]
impl Clone for NonZeroU32
[src]fn clone(&self) -> NonZeroU32
[src]
fn clone_from(&mut self, source: &Self)
1.0.0[src]
impl Div<NonZeroU32> for u32
1.51.0[src]
impl Div<NonZeroU32> for u32
1.51.0[src]type Output = u32
The resulting type after applying the /
operator.
fn div(self, other: NonZeroU32) -> u32
[src]
This operation rounds towards zero, truncating any fractional part of the exact result, and cannot panic.
impl From<NonZeroU16> for NonZeroU32
1.41.0[src]
impl From<NonZeroU16> for NonZeroU32
1.41.0[src]fn from(small: NonZeroU16) -> Self
[src]
Converts NonZeroU16
to NonZeroU32
losslessly.
impl From<NonZeroU32> for u32
1.31.0[src]
impl From<NonZeroU32> for u32
1.31.0[src]fn from(nonzero: NonZeroU32) -> Self
[src]
Converts a NonZeroU32
into an u32
impl From<NonZeroU32> for NonZeroU64
1.41.0[src]
impl From<NonZeroU32> for NonZeroU64
1.41.0[src]fn from(small: NonZeroU32) -> Self
[src]
Converts NonZeroU32
to NonZeroU64
losslessly.
impl From<NonZeroU32> for NonZeroU128
1.41.0[src]
impl From<NonZeroU32> for NonZeroU128
1.41.0[src]fn from(small: NonZeroU32) -> Self
[src]
Converts NonZeroU32
to NonZeroU128
losslessly.
impl From<NonZeroU32> for NonZeroI64
1.41.0[src]
impl From<NonZeroU32> for NonZeroI64
1.41.0[src]fn from(small: NonZeroU32) -> Self
[src]
Converts NonZeroU32
to NonZeroI64
losslessly.
impl From<NonZeroU32> for NonZeroI128
1.41.0[src]
impl From<NonZeroU32> for NonZeroI128
1.41.0[src]fn from(small: NonZeroU32) -> Self
[src]
Converts NonZeroU32
to NonZeroI128
losslessly.
impl From<NonZeroU8> for NonZeroU32
1.41.0[src]
impl From<NonZeroU8> for NonZeroU32
1.41.0[src]impl FromStr for NonZeroU32
1.35.0[src]
impl FromStr for NonZeroU32
1.35.0[src]impl Hash for NonZeroU32
[src]
impl Hash for NonZeroU32
[src]impl Ord for NonZeroU32
[src]
impl Ord for NonZeroU32
[src]impl PartialEq<NonZeroU32> for NonZeroU32
[src]
impl PartialEq<NonZeroU32> for NonZeroU32
[src]fn eq(&self, other: &NonZeroU32) -> bool
[src]
fn ne(&self, other: &NonZeroU32) -> bool
[src]
impl PartialOrd<NonZeroU32> for NonZeroU32
[src]
impl PartialOrd<NonZeroU32> for NonZeroU32
[src]impl Rem<NonZeroU32> for u32
1.51.0[src]
impl Rem<NonZeroU32> for u32
1.51.0[src]type Output = u32
The resulting type after applying the %
operator.
fn rem(self, other: NonZeroU32) -> u32
[src]
This operation satisfies n % d == n - (n / d) * d
, and cannot panic.
impl TryFrom<NonZeroI128> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroI128> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<NonZeroI16> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroI16> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<NonZeroI32> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroI32> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<NonZeroI64> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroI64> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<NonZeroI8> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroI8> for NonZeroU32
1.49.0[src]impl TryFrom<NonZeroIsize> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroIsize> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<NonZeroU128> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroU128> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<NonZeroU32> for NonZeroU8
1.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroU8
1.49.0[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<NonZeroU32> for NonZeroU16
1.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroU16
1.49.0[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 NonZeroU16
.
impl TryFrom<NonZeroU32> for NonZeroUsize
1.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroUsize
1.49.0[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 NonZeroUsize
.
impl TryFrom<NonZeroU32> for NonZeroI8
1.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroI8
1.49.0[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 NonZeroI8
.
impl TryFrom<NonZeroU32> for NonZeroI16
1.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroI16
1.49.0[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 NonZeroI16
.
impl TryFrom<NonZeroU32> for NonZeroI32
1.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroI32
1.49.0[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 NonZeroI32
.
impl TryFrom<NonZeroU32> for NonZeroIsize
1.49.0[src]
impl TryFrom<NonZeroU32> for NonZeroIsize
1.49.0[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 NonZeroIsize
.
impl TryFrom<NonZeroU64> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroU64> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<NonZeroUsize> for NonZeroU32
1.49.0[src]
impl TryFrom<NonZeroUsize> for NonZeroU32
1.49.0[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 NonZeroU32
.
impl TryFrom<u32> for NonZeroU32
1.46.0[src]
impl TryFrom<u32> for NonZeroU32
1.46.0[src]