Enum NSTDOptional 

#[repr(C, u8)]
pub enum NSTDOptional<T> {
    None,
    Some(T),
}

Available on crate feature core only.

Represents an optional (possibly uninitialized) value.

Variants

None

The uninitialized variant.

Some(T)

The initialized variant.

Implementations

impl<T> NSTDOptional<T>

pub fn unwrap(self) -> T

Attempts to return the contained Some value in an NSTDOptional.

This operation is only useful for testing code, it’s use in production should be discouraged.

Panics

Panics if self is a None value.

pub fn expect(self, msg: &str) -> T

Attempts to return the contained Some value in an NSTDOptional.

Panics

Panics with msg if self is a None value.

Trait Implementations

impl<T: Clone> Clone for NSTDOptional<T>

fn clone(&self) -> NSTDOptional<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for NSTDOptional<T>

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

Formats the value using the given formatter.

impl<T> Default for NSTDOptional<T>

fn default() -> NSTDOptional<T>

Returns the “default value” for a type.

impl<T: Ord> Ord for NSTDOptional<T>

fn cmp(&self, other: &NSTDOptional<T>) -> 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<T: PartialEq> PartialEq for NSTDOptional<T>

fn eq(&self, other: &NSTDOptional<T>) -> 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<T: PartialOrd> PartialOrd for NSTDOptional<T>

fn partial_cmp(&self, other: &NSTDOptional<T>) -> 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<T: Copy> Copy for NSTDOptional<T>

impl<T: Eq> Eq for NSTDOptional<T>

impl<T> StructuralPartialEq for NSTDOptional<T>