From e2d7b563cd22b92604e07dad9bf6bcf0393a46ca Mon Sep 17 00:00:00 2001
From: bd-912 <bdunahu@colostate.edu>
Date: Fri, 26 Apr 2024 19:36:16 -0600
Subject: HeatVisitor MessageSend anonymous, observe Factorial + others pass

---
 st/SymbolTable.java | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'st/SymbolTable.java')

diff --git a/st/SymbolTable.java b/st/SymbolTable.java
index 90640c6..15d33a0 100644
--- a/st/SymbolTable.java
+++ b/st/SymbolTable.java
@@ -2,6 +2,7 @@ package st;
 
 import java.util.*;
 import misc.*;
+import heat.TypecheckException;
 
 /**
  * Class which provides methods for interacting with and managing
@@ -30,11 +31,16 @@ public class SymbolTable {
 
     /**
      * Methods intended to be used during the first pass
+     *
+     * Will always throw a typecheck error when symbols are not distinct.
      */
     public void put(TokenKey id, AbstractInstance symbol) {
         MinimalLogger.info(String.format("Inserting %s -> %s",
                                          id,
                                          symbol.getType()));
+        if (this.symt.get(id) != null)
+            throw new TypecheckException(String.format("SymbolTable tried to place %s twice!",
+                                                       id.toString()));
         this.symt.put(id, symbol);
     }
 
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