public void Print(AdditionExpression ae, StringBuilder sb)
{
sb.Append("(");
Print((dynamic)ae.Left, sb);
sb.Append("+");
Print((dynamic)ae.Right, sb);
sb.Append(")");
}
static void Main(string[] args)
{
Expression e = new AdditionExpression(
new DoubleExpression(7),
new AdditionExpression(
new DoubleExpression(8),
new DoubleExpression(9)));
var ep = new ExpressionBuilder();
var sb = new StringBuilder();
ep.Print((dynamic)e, sb);
Console.WriteLine(sb.ToString());
}
