1.28.0[][src]Struct core::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<std::num::NonZeroUsize>>(), size_of::<usize>());Run

Methods

impl NonZeroUsize
[src]

Create a non-zero without checking the value.

Safety

The value must not be zero.

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

Returns the value as a primitive type.

Trait Implementations

impl Copy for NonZeroUsize
[src]

impl PartialEq<NonZeroUsize> for NonZeroUsize
[src]

impl Eq for NonZeroUsize
[src]

impl Ord for NonZeroUsize
[src]

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

impl PartialOrd<NonZeroUsize> for NonZeroUsize
[src]

impl Clone for NonZeroUsize
[src]

Performs copy-assignment from source. Read more

impl From<NonZeroUsize> for usize
1.31.0
[src]

impl Hash for NonZeroUsize
[src]

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

impl Debug for NonZeroUsize
[src]

impl Display for NonZeroUsize
[src]

impl Octal for NonZeroUsize
[src]

impl Binary for NonZeroUsize
[src]

impl LowerHex for NonZeroUsize
[src]

impl UpperHex for NonZeroUsize
[src]

Auto Trait Implementations

impl Send for NonZeroUsize

impl Sync for NonZeroUsize

Blanket Implementations

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

impl<T> From for T
[src]

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

🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

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

🔬 This is a nightly-only experimental API. (try_from #33417)

The type returned in the event of a conversion error.

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

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

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