From ab948234865055c2b667943cee1235af80ab8d2a Mon Sep 17 00:00:00 2001
From: keeganperry7 <keegan.perry.kp@gmail.com>
Date: Sun, 12 Jan 2025 20:14:12 +0200
Subject: [PATCH] Replace constructor with Iff.intro

---
 Katydid/Regex/SmartRegex.lean | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Katydid/Regex/SmartRegex.lean b/Katydid/Regex/SmartRegex.lean
index 80386f3..428fb66 100644
--- a/Katydid/Regex/SmartRegex.lean
+++ b/Katydid/Regex/SmartRegex.lean
@@ -436,7 +436,7 @@ theorem derive_commutes {α: Type} (r: Regex α) (x: α):
     split_ifs with h
     · rw [denote]
       simp only [Language.emptystr, cons.injEq]
-      constructor
+      apply Iff.intro
       · intro hxs
         use x
       · intro ⟨w, hxs, hp⟩