From 4e8747a7cdc21b51ee88cea499dfb0a6240ca0cf Mon Sep 17 00:00:00 2001
From: Paul C Roberts <pacaro@gmail.com>
Date: Thu, 11 Jul 2024 16:17:41 -0700
Subject: [PATCH] Fix bug in common sub-expression matching

A line can have unbalanced paren. This ensures that a closing paren has a corresponding open on the same line.
---
 src/make-wgsl.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/make-wgsl.ts b/src/make-wgsl.ts
index f6a2a2f..7497f2f 100644
--- a/src/make-wgsl.ts
+++ b/src/make-wgsl.ts
@@ -178,7 +178,7 @@ const postProcessImpl = (lines: string[], indent: string): string => {
         const ch = line.charAt(i);
         if (ch === "(") {
           starts.push(i);
-        } else if (ch === ")") {
+        } else if (ch === ")" && starts.length > 0) {
           let start = starts.pop()!;
           // check previous character until either '(' or ' ' is found
           for (let j = start - 1; j >= 0; j--) {