From 08d574d88cf47fd87b4de1db12d52483d0d13374 Mon Sep 17 00:00:00 2001
From: Jonathan Evans <jdev52@umsystem.edu>
Date: Wed, 8 Apr 2020 17:55:34 +0000
Subject: [PATCH] changed valuetype to support various types

---
 SymbolTable.h      |  2 --
 SymbolTableEntry.h | 35 ++++++++++++++++++++++++++++++-----
 2 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/SymbolTable.h b/SymbolTable.h
index 30df58a..8ba3dca 100644
--- a/SymbolTable.h
+++ b/SymbolTable.h
@@ -7,8 +7,6 @@
 #include "SymbolTableEntry.h"
 using namespace std;
 
-
-
 class SYMBOL_TABLE 
 {
 private:
diff --git a/SymbolTableEntry.h b/SymbolTableEntry.h
index 1b579a3..1a7bab7 100644
--- a/SymbolTableEntry.h
+++ b/SymbolTableEntry.h
@@ -2,6 +2,8 @@
 #define SYMBOL_TABLE_ENTRY_H
 
 #include <string>
+#include <ostream>
+#include <stdexcept>
 using namespace std;
 
 #define UNDEFINED     -1   // Type codes 
@@ -19,20 +21,43 @@ using namespace std;
 #define LOGICAL             11
 #define RELATIONAL          12
 
-typedef struct  
+union TYPE_VALUE{
+  char* text;
+  bool boolean;
+  int number;
+};
+
+struct TYPE_INFO 
 {
-    	//value can be int, bool or str not sure how to do this correctly
-	int value; //place holder	
+  TYPE_VALUE value;
+
 	// one of the above type codes
 	int type;
 
 	// numParams and returnType only applicable if type == FUNCTION   
-  	int numParams;  
+  int numParams;  
 	int returnType;
   
   // operatorType is only applicable if production is an operator 
   int operatorType;   
-} TYPE_INFO; 
+
+  friend ostream& operator<<(ostream& os, const TYPE_INFO& rhs){
+    switch(rhs.type){
+      case INT:
+        os << rhs.value.number;
+        break;
+      case STR:
+        os << rhs.value.text;
+        break;
+      case BOOL:
+        os << rhs.value.boolean;
+        break;
+      default:
+        throw std::invalid_argument("invalid type at print");
+    }
+    return os;
+  }
+}; 
 
 class SYMBOL_TABLE_ENTRY 
 {
-- 
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