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perf(identifier): use pattern matching

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way more efficient than manual slicing
This commit is contained in:
EdJoPaTo
2023-05-20 01:49:43 +02:00
parent 3e92570a16
commit 837e24ab4b
1 changed files with 5 additions and 8 deletions
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src/identifier.rs
+5 -8
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@@ -23,12 +23,9 @@ pub type TreeIdentifierVec = Vec<usize>;
/// assert_eq!(branch, []); /// assert_eq!(branch, []);
/// assert_eq!(leaf, None); /// assert_eq!(leaf, None);
/// ``` /// ```
pub fn get_without_leaf(identifier: TreeIdentifier) -> (TreeIdentifier, Option<&usize>) { pub const fn get_without_leaf(identifier: TreeIdentifier) -> (TreeIdentifier, Option<&usize>) {
let length = identifier.len(); match identifier {
let length_without_leaf = length.saturating_sub(1); [branch @ .., leaf] => (branch, Some(leaf)),
[] => (&[] as &[usize], None),
let branch = &identifier[0..length_without_leaf]; }
let leaf = identifier.get(length_without_leaf);
(branch, leaf)
} }