Enum OnceState

pub enum OnceState {
    New,
    Poisoned,
    InProgress,
    Done,
}

Current state of a Once.

Variants

New

A closure has not been executed yet

Poisoned

A closure was executed but panicked.

InProgress

A thread is currently executing a closure.

Done

A closure has completed successfully.

Implementations

impl OnceState

pub fn poisoned(self) -> bool

Returns whether the associated Once has been poisoned.

Once an initialization routine for a Once has panicked it will forever indicate to future forced initialization routines that it is poisoned.

pub fn done(self) -> bool

Returns whether the associated Once has successfully executed a closure.

Trait Implementations

impl Clone for OnceState

fn clone(&self) -> OnceState

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for OnceState

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

Formats the value using the given formatter.

impl PartialEq for OnceState

fn eq(&self, other: &OnceState) -> 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 Copy for OnceState

impl Eq for OnceState

impl StructuralPartialEq for OnceState