From 9957bd89efd99d71ba4444035a1c835337ed55d9 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Mon, 15 Dec 2025 15:31:17 +0000
Subject: [PATCH] Fix func-arity check to handle variadic functions

Handle the case where max arity is 'many' (unlimited) for
variadic functions, in addition to numeric max arity.

Co-authored-by: Kinneyzhang <38454496+Kinneyzhang@users.noreply.github.com>
---
 tp.el | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tp.el b/tp.el
index b7c9da1..477d94f 100644
--- a/tp.el
+++ b/tp.el
@@ -1321,7 +1321,10 @@ Example:
               (text (if (stringp obj)
                         (substring obj start end)
                       (buffer-substring start end)))
-              (new-text (if (>= (cdr arity) 2)
+              (max-arity (cdr arity))
+              (can-accept-idx (or (eq max-arity 'many)
+                                  (and (numberp max-arity) (>= max-arity 2))))
+              (new-text (if can-accept-idx
                             (funcall function text idx)
                           (funcall function text))))
          (setq idx (1+ idx))