Struct std::num::NonZeroUsize 1.28.0[−][src]
#[repr(transparent)]pub struct NonZeroUsize(_);
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<std::num::NonZeroU32>>(), size_of::<u32>());Run
Methods
impl NonZeroUsize[src]
impl NonZeroUsizepub const unsafe fn new_unchecked(n: usize) -> NonZeroUsize[src]
pub const unsafe fn new_unchecked(n: usize) -> NonZeroUsizepub fn new(n: usize) -> Option<NonZeroUsize>[src]
pub fn new(n: usize) -> Option<NonZeroUsize>Create a non-zero if the given value is not zero.
pub fn get(self) -> usize[src]
pub fn get(self) -> usizeReturns the value as a primitive type.
Trait Implementations
impl Hash for NonZeroUsize[src]
impl Hash for NonZeroUsizefn hash<__H>(&self, state: &mut __H) where
__H: Hasher, [src]
fn hash<__H>(&self, state: &mut __H) where
__H: Hasher, Feeds this value into the given [Hasher]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, 1.3.0[src]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, Feeds a slice of this type into the given [Hasher]. Read more
impl Binary for NonZeroUsize[src]
impl Binary for NonZeroUsizefn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter.
impl Clone for NonZeroUsize[src]
impl Clone for NonZeroUsizefn clone(&self) -> NonZeroUsize[src]
fn clone(&self) -> NonZeroUsizeReturns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0[src]
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
impl Debug for NonZeroUsize[src]
impl Debug for NonZeroUsizefn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter. Read more
impl PartialOrd<NonZeroUsize> for NonZeroUsize[src]
impl PartialOrd<NonZeroUsize> for NonZeroUsizefn partial_cmp(&self, other: &NonZeroUsize) -> Option<Ordering>[src]
fn partial_cmp(&self, other: &NonZeroUsize) -> Option<Ordering>This method returns an ordering between self and other values if one exists. Read more
fn lt(&self, other: &NonZeroUsize) -> bool[src]
fn lt(&self, other: &NonZeroUsize) -> boolThis method tests less than (for self and other) and is used by the < operator. Read more
fn le(&self, other: &NonZeroUsize) -> bool[src]
fn le(&self, other: &NonZeroUsize) -> boolThis method tests less than or equal to (for self and other) and is used by the <= operator. Read more
fn gt(&self, other: &NonZeroUsize) -> bool[src]
fn gt(&self, other: &NonZeroUsize) -> boolThis method tests greater than (for self and other) and is used by the > operator. Read more
fn ge(&self, other: &NonZeroUsize) -> bool[src]
fn ge(&self, other: &NonZeroUsize) -> boolThis method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
impl Ord for NonZeroUsize[src]
impl Ord for NonZeroUsizefn cmp(&self, other: &NonZeroUsize) -> Ordering[src]
fn cmp(&self, other: &NonZeroUsize) -> OrderingThis method returns an Ordering between self and other. Read more
fn max(self, other: Self) -> Self1.21.0[src]
fn max(self, other: Self) -> SelfCompares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self1.21.0[src]
fn min(self, other: Self) -> SelfCompares and returns the minimum of two values. Read more
impl Eq for NonZeroUsize[src]
impl Eq for NonZeroUsizeimpl PartialEq<NonZeroUsize> for NonZeroUsize[src]
impl PartialEq<NonZeroUsize> for NonZeroUsizefn eq(&self, other: &NonZeroUsize) -> bool[src]
fn eq(&self, other: &NonZeroUsize) -> boolThis method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &NonZeroUsize) -> bool[src]
fn ne(&self, other: &NonZeroUsize) -> boolThis method tests for !=.
impl Copy for NonZeroUsize[src]
impl Copy for NonZeroUsizeimpl UpperHex for NonZeroUsize[src]
impl UpperHex for NonZeroUsizefn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter.
impl Octal for NonZeroUsize[src]
impl Octal for NonZeroUsizefn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter.
impl LowerHex for NonZeroUsize[src]
impl LowerHex for NonZeroUsizefn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter.
impl Display for NonZeroUsize[src]
impl Display for NonZeroUsizeAuto Trait Implementations
impl Send for NonZeroUsize
impl Send for NonZeroUsizeimpl Sync for NonZeroUsize
impl Sync for NonZeroUsize