added back tuple class

util/DataStructureLib/tuple.cpp

+//
+// Created by Zane Dunnings on 3/17/18.
+//
+
+// Outline of query language from Prof. Nicole Hamilton, University of Michigan 03/15/2018
+//31 lines
+#include<string>
+#include<vector>
+#include "../../parser/Parser.h"
+//#include "../../constraintSolver/ISRAnd.h"
+using namespace std;
+
+
+class Token
+	{
+public:
+	Token()
+			:text(""), end( true ), OR( false ), AND( false ){}
+	Token( string input )
+			:text( input ), end( false ), OR( false ), AND( false )
+		{
+		if(input ==  "-OR-" )
+			OR = true;
+		else if(input == "-AND-")
+			AND=true;
+		}
+	//TODO: This is for scaling to add more ISR types
+	string text;
+	bool OR;
+	bool AND;
+	bool end;
+	};
+
+enum TupleType
+	{
+	PhraseTupleType,
+	OrTupleType,
+	AndTupleType,
+	NotTupleType,
+	SearchTupleType
+	};
+
+class Tuple
+	{
+public:
+
+	Token object;
+	vector<Tuple *> Next;
+	TupleType Type;
+	//ISR *Compile( );
+	Tuple( )
+			: object( Token() ), Type( AndTupleType ) {}
+	Tuple( Token input )
+			: object( input ), Type( AndTupleType )
+		{
+		if(input.AND)
+			Type = AndTupleType;
+		else if (input.OR)
+			Type = OrTupleType;
+		else
+			Type = PhraseTupleType;
+		}
+	Tuple( TupleType type)
+			: object( Token( ) ), Type( type )
+		{
+		switch( type )
+			{
+			case( AndTupleType ):
+				object = Token("-AND-");
+				break;
+			case( OrTupleType ):
+				object = Token("-OR-");
+			default:
+				break;
+			}
+		}
+
+	};
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