From 17e897e2d69cc4b659fefcf7765c29c2f896d846 Mon Sep 17 00:00:00 2001
From: Aadhavan Srinivasan <aadhavan@twomorecents.org>
Date: Mon, 21 Apr 2025 19:11:37 -0400
Subject: [PATCH] Accept escaped hyphens, even outside character class

---
 regex/postfixNode.go | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/regex/postfixNode.go b/regex/postfixNode.go
index 0447669..b3b9797 100644
--- a/regex/postfixNode.go
+++ b/regex/postfixNode.go
@@ -131,13 +131,9 @@ func newEscapedNode(c rune, inCharClass bool) (postfixNode, error) {
 	case 'v': // Vertical tab
 		toReturn.nodetype = characterNode
 		toReturn.contents = append(toReturn.contents, rune(11))
-	case '-': // Literal hyphen - only in character class
-		if inCharClass {
-			toReturn.nodetype = characterNode
-			toReturn.contents = append(toReturn.contents, '-')
-		} else {
-			return postfixNode{}, fmt.Errorf("invalid escape character")
-		}
+	case '-': // Literal hyphen
+		toReturn.nodetype = characterNode
+		toReturn.contents = append(toReturn.contents, '-')
 	default: // None of the above - append it as a regular character
 		if isNormalChar(c) { // Normal characters cannot be escaped
 			return postfixNode{}, fmt.Errorf("invalid escape character")