package interpreter;
 
public class Expression1 {
 
	/**
	 * @param args
	 */
	public static void main(String[] args) {
 
		// Часть 1:
		BooleanExp expression;
		Context context = new Context();
		VariableExp x = new VariableExp("X");
		VariableExp y = new VariableExp("Y");
		expression = new OrExp(
			new AndExp(new Constant(true), x),
			new AndExp(y, new NotExp(x))
		);
		context.Assign(x, false);
		context.Assign(y, true);
		boolean result = expression.Evaluate(context);
		System.out.println(result);
 
		// Часть 2: замена значения y
		NotExp not_z = new NotExp(z) ;
		BooleanExp replacement = expression.Replace("Y", not_z);
		context.Assign(z, true);
		result = replacement.Evaluate(context);
		System.out.println(result);
	}
 
}