Update Parserv3.h

Parserv3.h

@@ -11,38 +11,63 @@ class Relation
 {
 	string name;
 	
-	Relation(string str)
-	{
-		name = str;
-	}
-	
-	void setRelation(string str)
-	{
-		name = str;
-	}	
-	string getName()
-	{
-		return name;
-	}
+	public: 
+		Relation()
+		{
+		}
+		
+		Relation(string str)
+		{
+			name = str;
+		}
+		
+		void setRelation(string str)
+		{
+			name = str;
+		}	
+		string getName()
+		{
+			return name;
+		}
 };
 
-
+class Attribute
+{
+	string name;
+	
+	public:
+		Attribute(string str)
+		{
+			name = str;
+		}
+		
+		void setAttribute(string str)
+		{
+			name = str;
+		}
+		
+		string getAttribute()
+		{
+			return name;
+		}
+};
 
 class Union
 {
 	string Un1;
 	string Un2;
 	
-	Union (string s1, string s2)
-	{
-		Un1 = s1;
-		Un2 = s2;
-	}
-	
-	string getUnion()
-	{
-		return "Union of " + Un1 + " and " + Un2;
-	}
+	public:
+		Union (string s1, string s2)
+		{
+			Un1 = s1;
+			Un2 = s2;
+		}
+		
+		string getUnion()
+		{
+			return "Union of " + Un1 + " and " + Un2;
+		}
 };
 
 class Product
@@ -50,16 +75,17 @@ class Product
 	string Pr1;
 	string Pr2;
 	
-	Product(string s1, string s2)
-	{
-		Pr1 = s1;
-		Pr2 = s2;
-	}
-	
-	string getProduct()
-	{
-		return "Product of " + Pr1 + " and " + Pr2;
-	}
+	public:
+		Product(string s1, string s2)
+		{
+			Pr1 = s1;
+			Pr2 = s2;
+		}
+		
+		string getProduct()
+		{
+			return "Product of " + Pr1 + " and " + Pr2;
+		}
 };
 
 class Difference
@@ -67,16 +93,17 @@ class Difference
 	string D1;
 	string D2;
 	
-	Difference(string s1, string s2)
-	{
-		D1 = s1;
-		D2 = s2;
-	}
-	
-	string getDifference()
-	{
-		return "Difference of " + D1 + " and " + D2;
-	}
+	public:
+		Difference(string s1, string s2)
+		{
+			D1 = s1;
+			D2 = s2;
+		}
+		
+		string getDifference()
+		{
+			return "Difference of " + D1 + " and " + D2;
+		}
 };
 
 class Renaming
@@ -84,16 +111,17 @@ class Renaming
 	string newName;
 	string oldName;
 	
-	Renaming(string s1, string s2)
-	{
-		newName = s1;
-		oldName = s2;
-	}
-	
-	string doRename()
-	{
-		return "Renaming " + oldName + " to " + newName;
-	}
+	public:
+		Renaming(string s1, string s2)
+		{
+			newName = s1;
+			oldName = s2;
+		}
+		
+		string doRename()
+		{
+			return "Renaming " + oldName + " to " + newName;
+		}
 };
 
 class Projection
@@ -101,16 +129,17 @@ class Projection
 	string newName;
 	string oldName;
 	
-	Projection(string s1, string s2)
-	{
-		newName = s1;
-		oldName = s2;
-	}
-	
-	string doProjection()
-	{
-		return "Projecting " + oldName + " onto " + newName;
-	}
+	public:
+		Projection(string s1, string s2)
+		{
+			newName = s1;
+			oldName = s2;
+		}
+		
+		string doProjection()
+		{
+			return "Projecting " + oldName + " onto " + newName;
+		}
 };
 
 class Operand
@@ -216,6 +245,11 @@ class Condition
 {
 	string cond;
 	public:
+	
+		Condition()
+		{
+		}
+	
 		Condition(string str)
 		{
 			cond = str;
@@ -246,3 +280,29 @@ class Selection
 			return select;
 		}
 };
+
+class Expression
+{
+	string exp;
+	
+	public:
+	
+		Expression()
+		{
+		}
+	
+		Expression(string str)
+		{
+			exp = str;
+		}
+		
+		void setExpression(string str)
+		{
+			exp = str;
+		}
+		
+		string getExpression()
+		{
+			return exp;
+		}
+};