From 5e1dc927c3431a1d7cd271bc2f18071c8fe0817a Mon Sep 17 00:00:00 2001
From: Jiseok CHOI <jiseok.dev@gmail.com>
Date: Fri, 14 Feb 2025 17:43:35 +0900
Subject: [PATCH] perf(node): replace `std::array::from_fn` with const block
 initializer (#87)

---
 src/node.rs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/node.rs b/src/node.rs
index 5b5e41c..1a30684 100644
--- a/src/node.rs
+++ b/src/node.rs
@@ -245,7 +245,7 @@ pub(crate) struct FlatNode<P: KeyTrait, N, const WIDTH: usize> {
 
 impl<P: KeyTrait, N, const WIDTH: usize> FlatNode<P, N, WIDTH> {
     pub(crate) fn new(prefix: P) -> Self {
-        let children: [Option<Arc<N>>; WIDTH] = std::array::from_fn(|_| None);
+        let children: [Option<Arc<N>>; WIDTH] = [const { None }; WIDTH];
 
         Self {
             prefix,
@@ -410,7 +410,7 @@ impl<P: KeyTrait, N> Node48<P, N> {
         Self {
             prefix,
             keys: Box::new([u8::MAX; 256]),
-            children: Box::new(std::array::from_fn(|_| None)),
+            children: Box::new([const { None }; 48]),
             inner_twig: None,
             child_bitmap: 0,
         }
@@ -554,7 +554,7 @@ impl<P: KeyTrait, N> Node256<P, N> {
     pub(crate) fn new(prefix: P) -> Self {
         Self {
             prefix,
-            children: Box::new(std::array::from_fn(|_| None)),
+            children: Box::new([const { None }; 256]),
             inner_twig: None,
             num_children: 0,
         }