1 files changed, 14 insertions, 0 deletions
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;