Struct NonMinI64 

pub struct NonMinI64 { /* private fields */ }

An integer of type i64 which is known to not equal i64::MIN.

This type allows for niche filling optimization (similar to the existing std::num::NonZero* types) meaning items such as Option<NonMinI64> and Result<NonMinI64, ()> take up the same amount of space as i64.

// Create using `new`, extract value using `get`
let x = NonMinI64::new(123).unwrap();
assert_eq!(x.get(), 123);

// The value cannot be `i64::MIN`
let y = NonMinI64::new(i64::MIN);
assert_eq!(y, None);

// Niche filling optimization works!
use std::mem::size_of;
assert_eq!(size_of::<i64>(), size_of::<NonMinI64>());
assert_eq!(size_of::<i64>(), size_of::<Option<NonMinI64>>());

Implementations

impl NonMinI64

pub fn new(value: i64) -> Option<Self>

Creates an instance of NonMinI64 by checking if the value is not i64::MIN.

pub unsafe fn new_unchecked(value: i64) -> Self

Creates an instance of NonMinI64 without checking if the value is not i64::MIN.

Safety

The value cannot be equal to i64::MIN.

pub fn get(self) -> i64

Returns the integer value.

Trait Implementations

impl Clone for NonMinI64

fn clone(&self) -> NonMinI64

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NonMinI64

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

Formats the value using the given formatter.

impl Display for NonMinI64

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

Formats the value using the given formatter.

impl From<NonMinI64> for i64

fn from(nontype: NonMinI64) -> Self

Converts to this type from the input type.

impl Hash for NonMinI64

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for NonMinI64

fn cmp(&self, other: &NonMinI64) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for NonMinI64

fn eq(&self, other: &NonMinI64) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for NonMinI64

fn partial_cmp(&self, other: &NonMinI64) -> Option<Ordering>

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

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

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

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

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

impl Copy for NonMinI64

impl Eq for NonMinI64

impl StructuralPartialEq for NonMinI64