Struct IOption 

pub struct IOption<T: Nullable>(/* private fields */);

The IOption type, a transparent newtype wrapper around a Nullable value that provides a similar API to Option.

See the module-level documentation for more information.

Implementations

impl<T: Nullable> IOption<T>

pub const fn new(value: T) -> Self

pub const fn none() -> Self

pub fn is_none(&self) -> bool

pub fn is_some(&self) -> bool

pub fn into_inner(self) -> T

pub fn as_ref(&self) -> Option<&T>

pub fn as_mut(&mut self) -> Option<&mut T>

pub fn map<U, F>(self, f: F) -> IOption<U>

where U: Nullable, F: FnOnce(T) -> U,

pub fn map_or<U, F>(self, default: U, f: F) -> U

where U: Nullable, F: FnOnce(T) -> U,

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U

where U: Nullable, D: FnOnce() -> U, F: FnOnce(T) -> U,

pub fn ok_or<E>(self, err: E) -> Result<T, E>

pub fn ok_or_else<E, F>(self, err: F) -> Result<T, E>

where F: FnOnce() -> E,

pub fn and<U>(self, other: IOption<U>) -> IOption<U>

where U: Nullable,

pub fn and_then<U, F>(self, f: F) -> IOption<U>

where U: Nullable, F: FnOnce(T) -> IOption<U>,

pub fn or(self, other: IOption<T>) -> IOption<T>

where T: Nullable,

pub fn or_else<F>(self, f: F) -> IOption<T>

where T: Nullable, F: FnOnce() -> IOption<T>,

pub fn unwrap(self) -> T

pub fn unwrap_or(self, default: T) -> T

pub fn unwrap_or_else<F>(self, f: F) -> T

where F: FnOnce() -> T,

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

pub fn iter(&self) -> IntoIter<&T>

pub fn iter_mut(&mut self) -> IntoIter<&mut T>

pub fn filter<P>(self, predicate: P) -> IOption<T>

where P: FnOnce(&T) -> bool,

pub fn take(&mut self) -> IOption<T>

pub fn replace(&mut self, value: T) -> IOption<T>

pub fn get_or_insert(&mut self, value: T) -> &mut T

pub fn get_or_insert_with<F>(&mut self, f: F) -> &mut T

where F: FnOnce() -> T,

pub fn get_or_insert_default(&mut self) -> &mut T

where T: Default,

Trait Implementations

impl<T: Clone + Nullable> Clone for IOption<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug + Nullable> Debug for IOption<T>

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

Formats the value using the given formatter.

impl<T: Nullable> Default for IOption<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: Nullable> From<IOption<T>> for Option<T>

fn from(ioption: IOption<T>) -> Self

Converts to this type from the input type.

impl<T: Nullable> From<Option<T>> for IOption<T>

fn from(option: Option<T>) -> Self

Converts to this type from the input type.

impl<T: Nullable> From<T> for IOption<T>

fn from(value: T) -> Self

Converts to this type from the input type.

impl<T: Hash + Nullable> Hash for IOption<T>

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<T: Ord + Nullable> Ord for IOption<T>

fn cmp(&self, other: &IOption<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 + Nullable> PartialEq for IOption<T>

fn eq(&self, other: &IOption<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 + Nullable> PartialOrd for IOption<T>

fn partial_cmp(&self, other: &IOption<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 + Nullable> Copy for IOption<T>

impl<T: Eq + Nullable> Eq for IOption<T>

impl<T: Nullable> StructuralPartialEq for IOption<T>