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script: Take away Fallible from new_resolved and new_rejected (#35473)

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* script: Take away Fallible from new_resolved and new_rejected

Both Promise::new_resolved and new_rejected only return `Ok`. We don't
need them to be fallible. Simply return `Rc<Promise>`, instead of
`Fallible<Rc<Promise>>`. Also, clean up relevant code.

Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>

* script: pull_algorithm becomes infallible

The method pull_algorithm only returns `Some(Ok(_))`, which means it is
infallible. Clean up the returned type.

Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>

* script: generic_initialize becomes infallible

The method generic_initialize only returns `Ok(())`, which means it is
infallible. Clean up the returned type.

Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>

---------

Signed-off-by: Kingsley Yung <kingsley@kkoyung.dev>
This commit is contained in:
Kingsley Yung 2025-02-16 05:29:34 +08:00 • committed by GitHub
parent 3421185737
commit b4f48c561b
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9 changed files with 23 additions and 44 deletions
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21
components/script/dom/readablestreamgenericreader.rs
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@ -23,12 +23,7 @@ use crate::script_runtime::CanGc;
pub(crate) trait ReadableStreamGenericReader {
/// <https://streams.spec.whatwg.org/#readable-stream-reader-generic-initialize>
#[cfg_attr(crown, allow(crown::unrooted_must_root))]
fn generic_initialize(
&self,
global: &GlobalScope,
stream: &ReadableStream,
can_gc: CanGc,
) -> Fallible<()> {
fn generic_initialize(&self, global: &GlobalScope, stream: &ReadableStream, can_gc: CanGc) {
// Set reader.[[stream]] to stream.
self.set_stream(Some(stream));
@ -50,7 +45,7 @@ pub(crate) trait ReadableStreamGenericReader {
// Otherwise, if stream.[[state]] is "closed",
// Set reader.[[closedPromise]] to a promise resolved with undefined.
let cx = GlobalScope::get_cx();
self.set_closed_promise(Promise::new_resolved(global, cx, ())?);
self.set_closed_promise(Promise::new_resolved(global, cx, ()));
} else {
// Assert: stream.[[state]] is "errored"
assert!(stream.is_errored());
@ -59,13 +54,11 @@ pub(crate) trait ReadableStreamGenericReader {
let cx = GlobalScope::get_cx();
rooted!(in(*cx) let mut error = UndefinedValue());
stream.get_stored_error(error.handle_mut());
self.set_closed_promise(Promise::new_rejected(global, cx, error.handle())?);
self.set_closed_promise(Promise::new_rejected(global, cx, error.handle()));
// Set reader.[[closedPromise]].[[PromiseIsHandled]] to true
self.get_closed_promise().set_promise_is_handled();
}
Ok(())
}
/// <https://streams.spec.whatwg.org/#readable-stream-reader-generic-cancel>
@ -107,9 +100,11 @@ pub(crate) trait ReadableStreamGenericReader {
error.handle_mut(),
);
self.set_closed_promise(
Promise::new_rejected(&stream.global(), cx, error.handle()).unwrap(),
);
self.set_closed_promise(Promise::new_rejected(
&stream.global(),
cx,
error.handle(),
));
}
// Set reader.[[closedPromise]].[[PromiseIsHandled]] to true.
self.get_closed_promise().set_promise_is_handled();