dan/oxc
1
0
Fork 0
mirror of https://github.com/danbulant/oxc synced 2026-05-25 04:42:10 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

feat(data_structures): add SparseStack::last_mut method (#7528)

Browse source 
Add `SparseStack::last_mut` method, as companion to `SparseStack::last`.
This commit is contained in:
overlookmotel 2024-11-28 16:39:34 +00:00
parent d5aaee732e
commit defaf4bf2b
1 changed files with 15 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
crates/oxc_data_structures/src/stack/sparse.rs
View file

@ -128,6 +128,21 @@ impl<T> SparseStack<T> {
}
}
/// Get value of last entry on the stack.
#[inline]
pub fn last_mut(&mut self) -> Option<&mut T> {
let has_value = *self.has_values.last();
if has_value {
debug_assert!(!self.values.is_empty());
// SAFETY: Last `self.has_values` is only `true` if there's a corresponding value in `self.values`.
// This invariant is maintained in `push`, `pop`, `take_last`, `last_or_init`, and `last_mut_or_init`.
let value = unsafe { self.values.last_mut_unchecked() };
Some(value)
} else {
None
}
}
/// Take value from last entry on the stack, leaving last entry empty.
#[inline]
pub fn take_last(&mut self) -> Option<T> {