Throw on unmatched closing paren (#286)

Co-authored-by: Blake Embrey <hello@blakeembrey.com>

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(

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++] });
   }