Struct sp_std::num::NonZeroUsize

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

[−] Expand description

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>());

Implementations

impl NonZeroUsize[−]

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

Creates a non-zero without checking the value.

Safety

The value must not be zero.

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

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

pub const fn get(self) -> usize[−]

Returns the value as a primitive type.

Trait Implementations

impl Binary for NonZeroUsize[+]

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl BitOr<NonZeroUsize> for NonZeroUsize[+]

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type Output = NonZeroUsize

The resulting type after applying the | operator.

fn bitor(
    self,
    rhs: NonZeroUsize
) -> <NonZeroUsize as BitOr<NonZeroUsize>>::Output[−]

Performs the | operation.

impl BitOr<NonZeroUsize> for usize[+]

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type Output = NonZeroUsize

The resulting type after applying the | operator.

fn bitor(self, rhs: NonZeroUsize) -> <usize as BitOr<NonZeroUsize>>::Output[−]

Performs the | operation.

impl BitOr<usize> for NonZeroUsize[+]

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type Output = NonZeroUsize

The resulting type after applying the | operator.

fn bitor(self, rhs: usize) -> <NonZeroUsize as BitOr<usize>>::Output[−]

Performs the | operation.

impl BitOrAssign<NonZeroUsize> for NonZeroUsize[+]

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fn bitor_assign(&mut self, rhs: NonZeroUsize)[−]

Performs the |= operation.

impl BitOrAssign<usize> for NonZeroUsize[+]

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fn bitor_assign(&mut self, rhs: usize)[−]

Performs the |= operation.

impl Clone for NonZeroUsize[+]

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fn clone(&self) -> NonZeroUsize[−]

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for NonZeroUsize

impl Debug for NonZeroUsize[+]

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Display for NonZeroUsize[+]

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Eq for NonZeroUsize

impl From<NonZeroU16> for NonZeroUsize[+]

Converts NonZeroU16 to NonZeroUsize losslessly.

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fn from(small: NonZeroU16) -> NonZeroUsize[−]

Performs the conversion.

impl From<NonZeroU8> for NonZeroUsize[+]

Converts NonZeroU8 to NonZeroUsize losslessly.

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fn from(small: NonZeroU8) -> NonZeroUsize[−]

Performs the conversion.

impl From<NonZeroUsize> for usize[+]

fn from(nonzero: NonZeroUsize) -> usize[−]

Converts a NonZeroUsize into an usize

impl FromStr for NonZeroUsize[+]

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type Err = ParseIntError

The associated error which can be returned from parsing.

fn from_str(src: &str) -> Result<NonZeroUsize, <NonZeroUsize as FromStr>::Err>[−]

Parses a string s to return a value of this type.

impl Hash for NonZeroUsize[+]

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fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, [−]

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl LowerHex for NonZeroUsize[+]

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Octal for NonZeroUsize[+]

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Ord for NonZeroUsize[+]

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fn cmp(&self, other: &NonZeroUsize) -> Ordering[−]

This method returns an Ordering between self and other.

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#[must_use]fn max(self, other: Self) -> Self[−]

Compares and returns the maximum of two values.

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#[must_use]fn min(self, other: Self) -> Self[−]

Compares and returns the minimum of two values.

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#[must_use]fn clamp(self, min: Self, max: Self) -> Self[−]

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

Restrict a value to a certain interval.

impl PartialEq<NonZeroUsize> for NonZeroUsize[+]

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fn eq(&self, other: &NonZeroUsize) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &NonZeroUsize) -> bool[−]

This method tests for !=.

impl PartialOrd<NonZeroUsize> for NonZeroUsize[+]

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fn partial_cmp(&self, other: &NonZeroUsize) -> Option<Ordering>[−]

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &NonZeroUsize) -> bool[−]

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &NonZeroUsize) -> bool[−]

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &NonZeroUsize) -> bool[−]

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &NonZeroUsize) -> bool[−]

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<usize> for NonZeroUsize[+]

Attempts to convert usize to NonZeroUsize.

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type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(
    value: usize
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<usize>>::Error>[−]

Performs the conversion.

impl UpperHex for NonZeroUsize[+]

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.