Enum re_query::PromiseResult

pub enum PromiseResult<T> {
    Pending,
    Error(Arc<dyn Error + Send + Sync>),
    Ready(T),
}

The result of resolving a Promise through a PromiseResolver.

Variants

Pending

The resolution process is still in progress.

Try calling PromiseResolver::resolve again.

Error(Arc<dyn Error + Send + Sync>)

The Promise failed to resolve due to an irrecoverable error.

Ready(T)

The Promise has been fully resolved.

Implementations

impl<T> PromiseResult<T>

pub fn map<B, F>(self, f: F) -> PromiseResult<B>

where F: FnMut(T) -> B,

Applies the given transformation to the PromiseResult iff it’s Ready.

pub fn remap<B, F>(self, f: F) -> PromiseResult<B>

where F: FnMut(T) -> PromiseResult<B>,

Applies the given transformation to the PromiseResult iff it’s Ready.

Able to modify the result itself, not just the value contained within.

pub fn ok(self) -> Option<T>

Returns the inner value if it’s ready.

pub fn unwrap(self) -> T

Unwraps the resolved result if it’s Ready, panics otherwise.

impl<T, E: 'static + Error + Send + Sync> PromiseResult<Result<T, E>>

pub fn flatten(self) -> PromiseResult<T>

Given a PromiseResult of a Result, flattens it down to a single layer PromiseResult.

Trait Implementations

impl<T: Clone> Clone for PromiseResult<T>

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for PromiseResult<T>

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

Formats the value using the given formatter.