From 1a258cd0518316e6414f3ce653132f2c34130e3e Mon Sep 17 00:00:00 2001
From: hasslesstech <hasslesstech@tutanota.com>
Date: Wed, 14 Oct 2026 21:18:27 +0300
Subject: [PATCH] apply empty brackets removal until full fix

---
 src/syntaxer.cpp | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

diff --git a/src/syntaxer.cpp b/src/syntaxer.cpp
index 53e6a6d..61c93e3 100644
--- a/src/syntaxer.cpp
+++ b/src/syntaxer.cpp
@@ -792,20 +792,28 @@ static void remove_extra_brackets(std::vector<Expression::Token>& tv)
 static void process_remove_empty_brackets(std::vector<Expression::Token>& tv)
 {
 	pr_debug("Pre-process: remove empty brackets");
-	for (int i = 0; i < tv.size() - 1; i++)
-	{
-		if (tv[i].t == Expression::Token::OPERATOR
-			&& tv[i].v.o == Expression::Token::OPA
-			&& tv[i+1].t == Expression::Token::OPERATOR
-			&& tv[i+1].v.o == Expression::Token::CPA)
-		{
-			std::vector<int> highlight;
-			highlight.emplace_back(i);
-			highlight.emplace_back(i+1);
-			Parser::print_math_vector(tv, highlight);
 
-			tv.erase(tv.begin() + i, tv.begin() + i + 2);
-			i--;
+	int fix = -1;
+	while (fix) {
+		fix = 0;
+
+		for (int i = 0; i < tv.size() - 1; i++)
+		{
+			if (tv[i].t == Expression::Token::OPERATOR
+				&& tv[i].v.o == Expression::Token::OPA
+				&& tv[i+1].t == Expression::Token::OPERATOR
+				&& tv[i+1].v.o == Expression::Token::CPA)
+			{
+				std::vector<int> highlight;
+				highlight.emplace_back(i);
+				highlight.emplace_back(i+1);
+				Parser::print_math_vector(tv, highlight);
+
+				tv.erase(tv.begin() + i, tv.begin() + i + 2);
+				i--;
+
+				fix++;
+			}
 		}
 	}
 }