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Simplify RootedReference and make it specifically about slicesIt's now called DomSlice<T>.

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This commit is contained in:
Anthony Ramine 2019-03-10 18:37:14 +01:00
parent 1744a42dad
commit 4d527b20ee
6 changed files with 20 additions and 15 deletions
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25
components/script/dom/bindings/root.rs
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@ -256,18 +256,23 @@ pub unsafe fn trace_roots(tracer: *mut JSTracer) {
});
}
/// Get a reference out of a rooted value.
pub trait RootedReference<'root> {
/// The type of the reference.
type Ref: 'root;
/// Obtain a reference out of the rooted value.
fn r(&'root self) -> Self::Ref;
/// Get a slice of references to DOM objects.
pub trait DomSlice<T>
where
T: JSTraceable + DomObject,
{
/// Returns the slice of `T` references.
fn r(&self) -> &[&T];
}
impl<'root, T: JSTraceable + DomObject + 'root> RootedReference<'root> for [Dom<T>] {
type Ref = &'root [&'root T];
fn r(&'root self) -> &'root [&'root T] {
unsafe { mem::transmute(self) }
impl<T> DomSlice<T> for [Dom<T>]
where
T: JSTraceable + DomObject,
{
#[inline]
fn r(&self) -> &[&T] {
let _ = mem::transmute::<Dom<T>, &T>;
unsafe { &*(self as *const [Dom<T>] as *const [&T]) }
}
}