Struct NonNegativeUsize 

pub struct NonNegativeUsize(/* private fields */);

A non-negative usize (≥0)

Many configuration values allow explicitly specifying 0 to disable a behavior (e.g., no blank lines required) while still requiring validation for negative inputs during deserialization. NonNegativeUsize captures that intent and guarantees the stored value is never negative.

Implementations

impl NonNegativeUsize

pub fn new(value: usize) -> Self

Create a new NonNegativeUsize from an unsigned value.

pub fn try_from_i64(value: i64) -> Result<Self, NonNegativeUsizeError>

Attempt to create from a signed integer, validating it’s ≥0.

pub fn get(self) -> usize

Get the underlying value.

pub const fn from_const(value: usize) -> Self

Convert from a const (for use in defaults).

Trait Implementations

impl Clone for NonNegativeUsize

fn clone(&self) -> NonNegativeUsize

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NonNegativeUsize

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

Formats the value using the given formatter.

impl Default for NonNegativeUsize

fn default() -> NonNegativeUsize

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for NonNegativeUsize

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<NonNegativeUsize> for usize

fn from(val: NonNegativeUsize) -> Self

Converts to this type from the input type.

impl Hash for NonNegativeUsize

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 NonNegativeUsize

fn cmp(&self, other: &NonNegativeUsize) -> 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 NonNegativeUsize

fn eq(&self, other: &NonNegativeUsize) -> 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 NonNegativeUsize

fn partial_cmp(&self, other: &NonNegativeUsize) -> 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 Serialize for NonNegativeUsize

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for NonNegativeUsize

impl Eq for NonNegativeUsize

impl StructuralPartialEq for NonNegativeUsize