From fe6d99d4f1fcf70ec901e8fbf464290ace8e1a76 Mon Sep 17 00:00:00 2001
From: Felix Roos <flix91@gmail.com>
Date: Fri, 7 Jul 2023 21:48:19 +0200
Subject: [PATCH] slice array notation

---
 packages/core/pattern.mjs | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/packages/core/pattern.mjs b/packages/core/pattern.mjs
index b234c9d1..522b6238 100644
--- a/packages/core/pattern.mjs
+++ b/packages/core/pattern.mjs
@@ -2258,9 +2258,9 @@ export const slice = register(
         opat.outerBind((o) => {
           // If it's not an object, assume it's a string and make it a 's' control parameter
           o = o instanceof Object ? o : { s: o };
-          // Remember we must stay pure and avoid editing the object directly
-          const toAdd = { begin: i / n, end: (i + 1) / n, _slices: n };
-          return pure({ ...toAdd, ...o });
+          const begin = Array.isArray(n) ? n[i] : i / n;
+          const end = Array.isArray(n) ? n[i + 1] : (i + 1) / n;
+          return pure({ begin, end, _slices: n, ...o });
         }),
       ),
     );