Struct std::num::NonZeroU321.28.0[][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]

pub const unsafe fn new_unchecked(n: u32) -> NonZeroU321.28.0 (const: 1.28.0)[src]

Creates a non-zero without checking the value.

Safety

The value must not be zero.

pub const fn new(n: u32) -> Option<NonZeroU32>1.28.0 (const: 1.47.0)[src]

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

pub const fn get(self) -> u321.28.0 (const: 1.34.0)[src]

Returns the value as a primitive type.

impl NonZeroU32[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::NonZeroU32::new(u32::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::NonZeroU32::new(0b0101000).unwrap();

assert_eq!(n.trailing_zeros(), 3);
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impl NonZeroU32[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::NonZeroU32::new(8).unwrap();
assert!(eight.is_power_of_two());
let ten = std::num::NonZeroU32::new(10).unwrap();
assert!(!ten.is_power_of_two());
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Trait Implementations

impl Binary for NonZeroU32[src]

impl BitOr<NonZeroU32> for u321.45.0[src]

type Output = NonZeroU32

The resulting type after applying the | operator.

impl BitOr<NonZeroU32> for NonZeroU321.45.0[src]

type Output = NonZeroU32

The resulting type after applying the | operator.

impl BitOr<u32> for NonZeroU321.45.0[src]

type Output = NonZeroU32

The resulting type after applying the | operator.

impl BitOrAssign<NonZeroU32> for NonZeroU321.45.0[src]

impl BitOrAssign<u32> for NonZeroU321.45.0[src]

impl Clone for NonZeroU32[src]

impl Debug for NonZeroU32[src]

impl Display for NonZeroU32[src]

impl Div<NonZeroU32> for u321.51.0[src]

type Output = u32

The resulting type after applying the / operator.

pub 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 NonZeroU321.41.0[src]

pub fn from(small: NonZeroU16) -> NonZeroU32[src]

Converts NonZeroU16 to NonZeroU32 losslessly.

impl From<NonZeroU32> for NonZeroI1281.41.0[src]

pub fn from(small: NonZeroU32) -> NonZeroI128[src]

Converts NonZeroU32 to NonZeroI128 losslessly.

impl From<NonZeroU32> for NonZeroU641.41.0[src]

pub fn from(small: NonZeroU32) -> NonZeroU64[src]

Converts NonZeroU32 to NonZeroU64 losslessly.

impl From<NonZeroU32> for NonZeroI641.41.0[src]

pub fn from(small: NonZeroU32) -> NonZeroI64[src]

Converts NonZeroU32 to NonZeroI64 losslessly.

impl From<NonZeroU32> for u321.31.0[src]

pub fn from(nonzero: NonZeroU32) -> u32[src]

Converts a NonZeroU32 into an u32

impl From<NonZeroU32> for NonZeroU1281.41.0[src]

pub fn from(small: NonZeroU32) -> NonZeroU128[src]

Converts NonZeroU32 to NonZeroU128 losslessly.

impl From<NonZeroU8> for NonZeroU321.41.0[src]

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

Converts NonZeroU8 to NonZeroU32 losslessly.

impl FromStr for NonZeroU321.35.0[src]

type Err = ParseIntError

The associated error which can be returned from parsing.

impl Hash for NonZeroU32[src]

impl LowerHex for NonZeroU32[src]

impl Octal for NonZeroU32[src]

impl Ord for NonZeroU32[src]

impl PartialEq<NonZeroU32> for NonZeroU32[src]

impl PartialOrd<NonZeroU32> for NonZeroU32[src]

impl Rem<NonZeroU32> for u321.51.0[src]

type Output = u32

The resulting type after applying the % operator.

pub fn rem(self, other: NonZeroU32) -> u32[src]

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

impl TryFrom<NonZeroI128> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI128
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI128>>::Error>
[src]

Attempts to convert NonZeroI128 to NonZeroU32.

impl TryFrom<NonZeroI16> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI16
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI16>>::Error>
[src]

Attempts to convert NonZeroI16 to NonZeroU32.

impl TryFrom<NonZeroI32> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI32
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI32>>::Error>
[src]

Attempts to convert NonZeroI32 to NonZeroU32.

impl TryFrom<NonZeroI64> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI64
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI64>>::Error>
[src]

Attempts to convert NonZeroI64 to NonZeroU32.

impl TryFrom<NonZeroI8> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroI8
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI8>>::Error>
[src]

Attempts to convert NonZeroI8 to NonZeroU32.

impl TryFrom<NonZeroIsize> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

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

Attempts to convert NonZeroIsize to NonZeroU32.

impl TryFrom<NonZeroU128> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU128
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroU128>>::Error>
[src]

Attempts to convert NonZeroU128 to NonZeroU32.

impl TryFrom<NonZeroU32> for NonZeroI81.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU32>>::Error>
[src]

Attempts to convert NonZeroU32 to NonZeroI8.

impl TryFrom<NonZeroU32> for NonZeroU81.49.0[src]

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>
[src]

Attempts to convert NonZeroU32 to NonZeroU8.

impl TryFrom<NonZeroU32> for NonZeroU161.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroU32>>::Error>
[src]

Attempts to convert NonZeroU32 to NonZeroU16.

impl TryFrom<NonZeroU32> for NonZeroI161.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroU32>>::Error>
[src]

Attempts to convert NonZeroU32 to NonZeroI16.

impl TryFrom<NonZeroU32> for NonZeroUsize1.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

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

Attempts to convert NonZeroU32 to NonZeroUsize.

impl TryFrom<NonZeroU32> for NonZeroI321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU32
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroU32>>::Error>
[src]

Attempts to convert NonZeroU32 to NonZeroI32.

impl TryFrom<NonZeroU32> for NonZeroIsize1.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

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

Attempts to convert NonZeroU32 to NonZeroIsize.

impl TryFrom<NonZeroU64> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: NonZeroU64
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroU64>>::Error>
[src]

Attempts to convert NonZeroU64 to NonZeroU32.

impl TryFrom<NonZeroUsize> for NonZeroU321.49.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

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

Attempts to convert NonZeroUsize to NonZeroU32.

impl TryFrom<u32> for NonZeroU321.46.0[src]

type Error = TryFromIntError

The type returned in the event of a conversion error.

pub fn try_from(
    value: u32
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<u32>>::Error>
[src]

Attempts to convert u32 to NonZeroU32.

impl UpperHex for NonZeroU32[src]

impl Copy for NonZeroU32[src]

impl Eq for NonZeroU32[src]

impl StructuralEq for NonZeroU32[src]

impl StructuralPartialEq for NonZeroU32[src]

Auto Trait Implementations

impl RefUnwindSafe for NonZeroU32

impl Send for NonZeroU32

impl Sync for NonZeroU32

impl Unpin for NonZeroU32

impl UnwindSafe for NonZeroU32

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T> ToString for T where
    T: Display + ?Sized
[src]

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.

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.