Struct PromiseCapability 

pub struct PromiseCapability {
    pub promise: ObjectRef,
    pub resolve: CallableRef,
    pub reject: CallableRef,
}

A promise and its resolving functions (Js::new_promise). A host function returns promise at once and keeps the capability; when the embedder’s event arrives it settles the promise from the top level and drains the job queue.

Fields

promise: ObjectRef

resolve: CallableRef

reject: CallableRef

Implementations

impl PromiseCapability

pub fn resolve(&self, js: &mut impl Js, value: Value) -> JsResult<()>

Resolves the promise with value (a thenable is followed, as the specification’s resolve function does). Settling it twice does nothing.

pub fn reject(&self, js: &mut impl Js, reason: Value) -> JsResult<()>

Rejects the promise with reason.

Trait Implementations

impl Clone for PromiseCapability

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PromiseCapability

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

Formats the value using the given formatter.

impl PartialEq for PromiseCapability

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for PromiseCapability