From d8a969e231135978c4dd1fa67559101f506ad6f3 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Wed, 5 Nov 2025 01:20:07 -0800
Subject: recursion works for types with depth limit 5

---
 src/lang/ts-lang/util/utils.ts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/lang/ts-lang/util/utils.ts')

diff --git a/src/lang/ts-lang/util/utils.ts b/src/lang/ts-lang/util/utils.ts
index ac36ca1..d6d46f7 100644
--- a/src/lang/ts-lang/util/utils.ts
+++ b/src/lang/ts-lang/util/utils.ts
@@ -6,3 +6,17 @@ export type UnarrayIfOnlyHead<T extends readonly any[]> = T extends [
   : T extends [infer Head]
   ? Head
   : T;
+
+type ARR_EQUAL_SENTINEL = { __arrEq: true };
+export type ArrayEqual<
+  T extends readonly any[],
+  Last = ARR_EQUAL_SENTINEL
+> = T extends [infer Head, ...infer Tail]
+  ? Last extends ARR_EQUAL_SENTINEL
+    ? ArrayEqual<Tail, Head>
+    : Head extends Last
+    ? Last extends Head
+      ? ArrayEqual<Tail, Head>
+      : false
+    : false
+  : true;
-- 
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