From 538acc56790a870888b1245f826372931060afb3 Mon Sep 17 00:00:00 2001
From: Shota Matsumoto <shota.matsumoto@lifematics.co.jp>
Date: Mon, 19 Feb 2024 11:07:37 +0900
Subject: [PATCH] Fix warning for vars_to_approximate

---
 src/core/symbolic_simulate.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/symbolic_simulate.cpp b/src/core/symbolic_simulate.cpp
index c22961b9..0899c912 100644
--- a/src/core/symbolic_simulate.cpp
+++ b/src/core/symbolic_simulate.cpp
@@ -145,7 +145,7 @@ void add_vars_from_string(string vars_list_string, set<string> &set_to_add,
   string buffer;
   while (std::getline(sstr, buffer, ',')) {
     trim_front_and_behind_space(buffer);
-    regex re("^\l[\l\d]*'*$");
+    regex re(R"(^[a-z][a-z\d]*'*$)");
     smatch match;
     if (!regex_search(buffer, match, re)) {
       cout << warning_prefix << " warning : \"" << buffer