1.28.0[−][src]Struct std::num::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] 
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 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 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 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 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 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 Display for NonZeroUsize[src] 
impl Display 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 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 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 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 Copy for NonZeroUsize[src] 
impl Copy for NonZeroUsizeimpl Eq for NonZeroUsize[src] 
impl Eq for NonZeroUsizeimpl 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
Auto Trait Implementations
impl Send for NonZeroUsize
impl Send for NonZeroUsizeimpl Sync for NonZeroUsize
impl Sync for NonZeroUsizeBlanket Implementations
impl<T> From for T[src] 
impl<T> From for Timpl<T, U> TryFrom for T where
    T: From<U>, [src] 
impl<T, U> TryFrom for T where
    T: From<U>, type Error = !
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src] 
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>Performs the conversion.
impl<T, U> TryInto for T where
    U: TryFrom<T>, [src] 
impl<T, U> TryInto for T where
    U: TryFrom<T>, type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src] 
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>Performs the conversion.
impl<T, U> Into for T where
    U: From<T>, [src] 
impl<T, U> Into for T where
    U: From<T>, impl<T> Borrow for T where
    T: ?Sized, [src] 
impl<T> Borrow for T where
    T: ?Sized, ⓘImportant traits for &'a mut Ifn borrow(&self) -> &T[src] 
fn borrow(&self) -> &TImmutably borrows from an owned value. Read more
impl<T> BorrowMut for T where
    T: ?Sized, [src] 
impl<T> BorrowMut for T where
    T: ?Sized, ⓘImportant traits for &'a mut Ifn borrow_mut(&mut self) -> &mut T[src] 
fn borrow_mut(&mut self) -> &mut TMutably borrows from an owned value. Read more
impl<T> Any for T where
    T: 'static + ?Sized, [src] 
impl<T> Any for T where
    T: 'static + ?Sized, fn get_type_id(&self) -> TypeId[src] 
fn get_type_id(&self) -> TypeId🔬 This is a nightly-only experimental API.  (get_type_id #27745)
this method will likely be replaced by an associated static
Gets the TypeId of self. Read more
impl<T> ToOwned for T where
    T: Clone, [src] 
impl<T> ToOwned for T where
    T: Clone, type Owned = T
fn to_owned(&self) -> T[src] 
fn to_owned(&self) -> TCreates owned data from borrowed data, usually by cloning. Read more
fn clone_into(&self, target: &mut T)[src] 
fn clone_into(&self, target: &mut T)🔬 This is a nightly-only experimental API.  (toowned_clone_into #41263)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
impl<T> ToString for T where
    T: Display + ?Sized, [src] 
impl<T> ToString for T where
    T: Display + ?Sized,