AssignmentNode.java

public class AssignmentNode extends Node
{
    public String name;
    public Node value;
    public Parser parser;
    
    public AssignmentNode() {}
       
    public AssignmentNode(String name, Node value, Parser parser)
    {
        this.name = name;
        this.value = value;
        this.parser = parser;
    }
    
    public Object eval()
    {
        if (value instanceof Function)
            return parser.setVariable(name, value);
        else
            return parser.setVariable(name, value.eval());
    }    
}