import java.util.*;

public class Literal extends Expression {
	private Double token;
	public static Expression parse(Scanner tokens) throws Exception {
		Literal result = new Literal();
		result.token = tokens.nextDouble();
		return result;
	}
	public String toString() { return "" + token; }
	public double eval() throws Exception { return token; }
	public void accept(ExpVisitor v) { v.visit(this); }
}