Struct rusty_v8_m::Promise

#[repr(C)]pub struct Promise(_);

An instance of the built-in Promise constructor (ES6 draft).

Methods

impl Promise

pub fn state(&self) -> PromiseState

Returns the value of the [PromiseState] field.

pub fn has_handler(&self) -> bool

Returns true if the promise has at least one derived promise, and therefore resolve/reject handlers (including default handler).

pub fn result<'sc>(&self, scope: &mut impl ToLocal<'sc>) -> Local<'sc, Value>

Returns the content of the [[PromiseResult]] field. The Promise must not be pending.

pub fn catch<'sc>(
    &self,
    context: Local<'sc, Context>,
    handler: Local<'sc, Function>
) -> Option<Local<'sc, Promise>>

Register a rejection handler with a promise.

See Self::then2.

pub fn then<'sc>(
    &self,
    context: Local<'sc, Context>,
    handler: Local<'sc, Function>
) -> Option<Local<'sc, Promise>>

Register a resolution handler with a promise.

See Self::then2.

pub fn then2<'sc>(
    &self,
    context: Local<'sc, Context>,
    on_fulfilled: Local<'sc, Function>,
    on_rejected: Local<'sc, Function>
) -> Option<Local<'sc, Promise>>

Register a resolution/rejection handler with a promise. The handler is given the respective resolution/rejection value as an argument. If the promise is already resolved/rejected, the handler is invoked at the end of turn.

Methods from Deref<Target = Object>

pub fn set(
    &self,
    context: Local<Context>,
    key: Local<Value>,
    value: Local<Value>
) -> Option<bool>

Set only return Just(true) or Empty(), so if it should never fail, use result.Check().

pub fn set_index(
    &self,
    context: Local<Context>,
    index: u32,
    value: Local<Value>
) -> Option<bool>

Set only return Just(true) or Empty(), so if it should never fail, use result.Check().

pub fn get_property_names<'a>(
    &self,
    scope: &mut impl ToLocal<'a>,
    context: Local<Context>
) -> Local<'a, Array>

pub fn set_prototype(
    &self,
    context: Local<Context>,
    prototype: Local<Value>
) -> Option<bool>

Set the prototype object. This does not skip objects marked to be skipped by proto and it does not consult the security handler.

pub fn create_data_property(
    &self,
    context: Local<Context>,
    key: Local<Name>,
    value: Local<Value>
) -> Option<bool>

Implements CreateDataProperty (ECMA-262, 7.3.4).

Defines a configurable, writable, enumerable property with the given value on the object unless the property already exists and is not configurable or the object is not extensible.

Returns true on success.

pub fn define_own_property(
    &self,
    context: Local<Context>,
    key: Local<Name>,
    value: Local<Value>,
    attr: PropertyAttribute
) -> Option<bool>

Implements DefineOwnProperty.

In general, CreateDataProperty will be faster, however, does not allow for specifying attributes.

Returns true on success.

pub fn get<'a>(
    &self,
    scope: &mut impl ToLocal<'a>,
    context: Local<Context>,
    key: Local<Value>
) -> Option<Local<'a, Value>>

pub fn get_index<'a>(
    &self,
    scope: &mut impl ToLocal<'a>,
    context: Local<Context>,
    index: u32
) -> Option<Local<'a, Value>>

pub fn get_prototype<'a>(
    &self,
    scope: &mut impl ToLocal<'a>
) -> Option<Local<'a, Value>>

Get the prototype object. This does not skip objects marked to be skipped by proto and it does not consult the security handler.

pub fn get_identity_hash(&self) -> int

Returns the identity hash for this object. The current implementation uses a hidden property on the object to store the identity hash.

The return value will never be 0. Also, it is not guaranteed to be unique.

pub fn creation_context<'a>(
    &self,
    scope: &mut impl ToLocal<'a>
) -> Local<'a, Context>

Returns the context in which the object was created.

Trait Implementations

impl Deref for Promise

type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.