1.28.0[][src]Struct std::num::NonZeroUsize

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

An integer that is known not to equal zero.

This enables some memory layout optimization. For example, Option<NonZeroUsize> is the same size as usize:

use std::mem::size_of;
assert_eq!(size_of::<Option<core::num::NonZeroUsize>>(), size_of::<usize>());Run

Methods

impl NonZeroUsize[src]

pub const unsafe fn new_unchecked(n: usize) -> NonZeroUsize[src]

Creates a non-zero without checking the value.

Safety

The value must not be zero.

pub fn new(n: usize) -> Option<NonZeroUsize>[src]

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

pub const fn get(self) -> usize[src]

Returns the value as a primitive type.

Trait Implementations

impl Copy for NonZeroUsize[src]

impl UpperHex for NonZeroUsize[src]

impl Octal for NonZeroUsize[src]

impl Hash for NonZeroUsize[src]

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

Feeds a slice of this type into the given [Hasher]. Read more

impl Clone for NonZeroUsize[src]

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Eq for NonZeroUsize[src]

impl PartialOrd<NonZeroUsize> for NonZeroUsize[src]

impl Binary for NonZeroUsize[src]

impl Ord for NonZeroUsize[src]

fn max(self, other: Self) -> Self1.21.0[src]

Compares and returns the maximum of two values. Read more

fn min(self, other: Self) -> Self1.21.0[src]

Compares and returns the minimum of two values. Read more

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

🔬 This is a nightly-only experimental API. (clamp #44095)

Restrict a value to a certain interval. Read more

impl Debug for NonZeroUsize[src]

impl PartialEq<NonZeroUsize> for NonZeroUsize[src]

impl LowerHex for NonZeroUsize[src]

impl Display for NonZeroUsize[src]

impl From<NonZeroUsize> for usize1.31.0[src]

impl FromStr for NonZeroUsize1.35.0[src]

type Err = ParseIntError

The associated error which can be returned from parsing.

Auto Trait Implementations

impl UnwindSafe for NonZeroUsize

impl RefUnwindSafe for NonZeroUsize

impl Unpin for NonZeroUsize

impl Send for NonZeroUsize

impl Sync for NonZeroUsize

Blanket Implementations

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

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

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.

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

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

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