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Add ZeroVec::as_slice #5621

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merged 1 commit into from
Sep 30, 2024
Merged

Add ZeroVec::as_slice #5621

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22 changes: 17 additions & 5 deletions utils/zerovec/src/zerovec/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -109,8 +109,7 @@ impl<'a, T: AsULE> Deref for ZeroVec<'a, T> {
type Target = ZeroSlice<T>;
#[inline]
fn deref(&self) -> &Self::Target {
let slice: &[T::ULE] = self.vector.as_slice();
ZeroSlice::from_ule_slice(slice)
self.as_slice()
}
}

Expand Down Expand Up @@ -193,7 +192,7 @@ impl<'a, T: AsULE> Clone for ZeroVec<'a, T> {

impl<'a, T: AsULE> AsRef<ZeroSlice<T>> for ZeroVec<'a, T> {
fn as_ref(&self) -> &ZeroSlice<T> {
self.deref()
self.as_slice()
}
}

Expand Down Expand Up @@ -429,6 +428,16 @@ impl<'a, T: AsULE> ZeroVec<'a, T> {
}
}

/// Returns this [`ZeroVec`] as a [`ZeroSlice`].
///
/// To get a reference with a longer lifetime from a borrowed [`ZeroVec`],
/// use [`ZeroVec::as_maybe_borrowed`].
#[inline]
pub const fn as_slice(&self) -> &ZeroSlice<T> {
let slice: &[T::ULE] = self.vector.as_slice();
ZeroSlice::from_ule_slice(slice)
}

/// Casts a `ZeroVec<T>` to a compatible `ZeroVec<P>`.
///
/// `T` and `P` are compatible if they have the same `ULE` representation.
Expand Down Expand Up @@ -567,8 +576,11 @@ impl<'a, T: AsULE> ZeroVec<'a, T> {
self.vector.capacity != 0
}

/// If this is a borrowed ZeroVec, return it as a slice that covers
/// its lifetime parameter
/// If this is a borrowed [`ZeroVec`], return it as a slice that covers
/// its lifetime parameter.
///
/// To infallibly get a [`ZeroSlice`] with a shorter lifetime, use
/// [`ZeroVec::as_slice`].
#[inline]
pub fn as_maybe_borrowed(&self) -> Option<&'a ZeroSlice<T>> {
if self.is_owned() {
Expand Down