Enum UnderlyingSourceType 

pub(crate) enum UnderlyingSourceType {
    Memory(usize),
    Blob(usize),
    FetchResponse,
    Js(UnderlyingSource<DomTypeHolder>, Heap<*mut JSObject>),
    Tee(Dom<DefaultTeeUnderlyingSource>),
    Transfer(Dom<MessagePort>),
    Transform(Dom<TransformStream>, Rc<Promise>),
}

https://streams.spec.whatwg.org/#underlying-source-api The Js variant corresponds to the JavaScript object representing the underlying source. The other variants are native sources in Rust.

Variants

Memory(usize)

Facilitate partial integration with sources that are currently read into memory.

Blob(usize)

A blob as underlying source, with a known total size.

FetchResponse

A fetch response as underlying source.

Js(UnderlyingSource<DomTypeHolder>, Heap<*mut JSObject>)

A struct representing a JS object as underlying source, and the actual JS object for use as thisArg in callbacks.

Tee(Dom<DefaultTeeUnderlyingSource>)

Tee

Transfer(Dom<MessagePort>)

Transfer, with the port used in some of the algorithms.

Transform(Dom<TransformStream>, Rc<Promise>)

A struct representing a JS object as underlying source, and the actual JS object for use as thisArg in callbacks. This is used for the TransformStream API.

Implementations

impl UnderlyingSourceType

pub(crate) fn is_native(&self) -> bool

Is the source backed by a Rust native source?

pub(crate) fn in_memory(&self) -> bool

Does the source have all data in memory?

Trait Implementations

impl Traceable for UnderlyingSourceType

unsafe fn trace(&self, tracer: *mut JSTracer)

Trace self.