From 689f3a0d0cab399717d1152da21929c980061e9b Mon Sep 17 00:00:00 2001
From: EuAndreh <eu@euandre.org>
Date: Fri, 11 Jul 2025 15:25:36 -0300
Subject: src/paca.mjs: Move error detection from tokenizeRegexStep =>
 tokenizeRegex

---
 src/paca.mjs | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

(limited to 'src')

diff --git a/src/paca.mjs b/src/paca.mjs
index 993d26c..380200a 100644
--- a/src/paca.mjs
+++ b/src/paca.mjs
@@ -36,12 +36,6 @@ const tokenizeRegexStep = chars => ({ out, state }, char, index) => {
 	}
 
 	if (char === "\\") {
-		if (next === undefined) {
-			throw new SyntaxError(
-				`bad trailing escape character: ${chars}`,
-			);
-		}
-
 		return {
 			out,
 			state: ConcatStep.ESCAPING,
@@ -61,8 +55,18 @@ const tokenizeRegexFn = chars =>
 		state: ConcatStep.ACCEPTING,
 	});
 
-const tokenizeRegex = chars =>
-	tokenizeRegexFn(chars).out;
+const tokenizeRegex = chars => {
+	const tokens = tokenizeRegexFn(chars);
+	if (!!tokens.error) {
+		throw tokens.error;
+	}
+
+	if (tokens.state !== ConcatStep.ACCEPTING) {
+		throw new SyntaxError("bad ending state: " + tokens.state);
+	}
+
+	return tokens.out;
+};
 
 const PRECEDENCE = {
 	"(":      4,
-- 
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