From b371be43d6a30edaba96429380cc47d0f318722d Mon Sep 17 00:00:00 2001
From: Brychan Dempsey <brychand@hotmail.com>
Date: Wed, 17 Mar 2021 13:55:42 +1300
Subject: [PATCH] Added a check if the current value already exists (Closes #5)

---
 Assignment 1/Program.cs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Assignment 1/Program.cs b/Assignment 1/Program.cs
index 4cefba3..33742a7 100644
--- a/Assignment 1/Program.cs	
+++ b/Assignment 1/Program.cs	
@@ -233,6 +233,11 @@ namespace Assignment_1
                     {
                         throw new ParserException("Cannot assign a value to a reserved constant", 0, keyEndPos - (key.Length + 1));
                     }
+                    else if (Symbols.ContainsKey(key) && !checkExist)
+                    {
+                        // key already exists, remove it 
+                        Symbols.Remove(key);
+                    }
                     source.Position = keyEndPos;
                 }
                 return key;