From 455a52922b251ba9d627116c15005cd307e64e21 Mon Sep 17 00:00:00 2001
From: Martin <martin.prazak@gmail.com>
Date: Tue, 27 Nov 2018 16:09:40 +0000
Subject: [PATCH] Equality operator on symbol_table should be const

---
 exprtk.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/exprtk.hpp b/exprtk.hpp
index 802955a..355eb4c 100644
--- a/exprtk.hpp
+++ b/exprtk.hpp
@@ -16732,7 +16732,7 @@ namespace exprtk
          return (*this);
       }
 
-      inline bool operator==(const symbol_table<T>& st)
+      inline bool operator==(const symbol_table<T>& st) const
       {
          return (this == &st) || (control_block_ == st.control_block_);
       }