From 6b7a4525b4d8633b6520987738ba04a732e1d6b2 Mon Sep 17 00:00:00 2001
From: Gregorio Litenstein <g.litenstein@gmail.com>
Date: Wed, 24 Jul 2024 22:17:56 -0400
Subject: [PATCH] Throw on unmatched closing paren (#286)

Co-authored-by: Blake Embrey <hello@blakeembrey.com>
---
 src/index.spec.ts | 12 ++++++++++++
 src/index.ts      |  4 ++++
 2 files changed, 16 insertions(+)

diff --git a/src/index.spec.ts b/src/index.spec.ts
index 73f2c78..b51dd9b 100644
--- a/src/index.spec.ts
+++ b/src/index.spec.ts
@@ -31,6 +31,18 @@ describe("path-to-regexp", () => {
       );
     });
 
+    it("should throw on unmatched )", function () {
+      expect(() => match("/:fooab)c")).toThrow(
+        new TypeError("Unmatched ) at 7: https://git.new/pathToRegexpError"),
+      );
+    });
+
+    it("should throw on unmatched ) after other patterns", function () {
+      expect(() => match("/:test(\\w+)/:foo(\\d+))")).toThrow(
+        new TypeError("Unmatched ) at 21: https://git.new/pathToRegexpError"),
+      );
+    });
+
     it("should throw on missing pattern", () => {
       expect(() => match("/:foo()")).toThrow(
         new TypeError(
diff --git a/src/index.ts b/src/index.ts
index ec4fad1..0d8bc53 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -199,6 +199,10 @@ function lexer(str: string) {
       continue;
     }
 
+    if (value === ")") {
+      throw new TypeError(`Unmatched ) at ${i}: ${DEBUG_URL}`);
+    }
+
     tokens.push({ type: "CHAR", index: i, value: chars[i++] });
   }