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 Display for NonZeroUsize[src]

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

impl Debug for NonZeroUsize[src]

impl Octal for NonZeroUsize[src]

impl Clone for NonZeroUsize[src]

impl PartialOrd<NonZeroUsize> for NonZeroUsize[src]

impl StructuralPartialEq for NonZeroUsize[src]

impl Binary for NonZeroUsize[src]

impl Copy for NonZeroUsize[src]

impl LowerHex for NonZeroUsize[src]

impl Eq for NonZeroUsize[src]

impl UpperHex for NonZeroUsize[src]

impl FromStr for NonZeroUsize1.35.0[src]

type Err = ParseIntError

The associated error which can be returned from parsing.

impl PartialEq<NonZeroUsize> for NonZeroUsize[src]

impl Hash for NonZeroUsize[src]

impl Ord for NonZeroUsize[src]

impl StructuralEq for NonZeroUsize[src]

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> From<T> for T[src]

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

type Error = !

The type returned in the event of a conversion error.

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