Enum State 

pub enum State<T, E> {
    Loading {
        task: Task,
    },
    Success(T),
    Error(E),
}

Represents the state of an async operation

Variants

Loading

The operation is currently loading

Fields

task: Task

Success(T)

The operation completed successfully with data

Error(E)

The operation failed with an error

Implementations

impl<T, E> State<T, E>

pub fn is_loading(&self) -> bool

Returns true if the state is currently loading

pub fn is_success(&self) -> bool

Returns true if the state contains successful data

pub fn is_error(&self) -> bool

Returns true if the state contains an error

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

Returns the data if successful, None otherwise

pub fn error(&self) -> Option<&E>

Returns the error if failed, None otherwise

pub fn map<U, F>(self, op: F) -> State<U, E>

where F: FnOnce(T) -> U,

Maps a State<T, E> to State<U, E> by applying a function to the contained data if successful.

pub fn map_err<F, O>(self, op: O) -> State<T, F>

where O: FnOnce(E) -> F,

Maps a State<T, E> to State<T, F> by applying a function to the contained error if failed.

pub fn and_then<U, F>(self, op: F) -> State<U, E>

where F: FnOnce(T) -> State<U, E>,

Chains a State<T, E> to State<U, E> by applying a function to the contained data if successful.

Trait Implementations

impl<T, E> AsyncState for State<T, E>

type Data = T

The type of successful data

type Error = E

The type of error

fn is_loading(&self) -> bool

Returns true if the state is currently loading

fn is_success(&self) -> bool

Returns true if the state contains successful data

fn is_error(&self) -> bool

Returns true if the state contains an error

fn data(&self) -> Option<&T>

Returns the data if successful, None otherwise

fn error(&self) -> Option<&E>

Returns the error if failed, None otherwise

impl<T: Clone, E: Clone> Clone for State<T, E>

fn clone(&self) -> State<T, E>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug, E: Debug> Debug for State<T, E>

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

Formats the value using the given formatter.

impl<T: PartialEq, E: PartialEq> PartialEq for State<T, E>

fn eq(&self, other: &State<T, E>) -> 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, E> StructuralPartialEq for State<T, E>