public void Visit(AdditionExpression4 ae)
{
sb.Append("(");
ae.Left.Accept(this);
sb.Append("+");
ae.Right.Accept(this);
sb.Append(")");
}
public void Visit(AdditionExpression4 ae)
{
ae.Left.Accept(this);
var a = Result;
ae.Right.Accept(this);
var b = Result;
Result = a + b;
}
public void Print(AdditionExpression4 ae, StringBuilder sb)
{
sb.Append("(");
Print((dynamic)ae.Left, sb);
sb.Append("+");
Print((dynamic)ae.Right, sb);
sb.Append(")");
// dynamic cast -- find correct overload method
// slow
// runtime binary exception
}
public void Run()
{
Expression4 e = new AdditionExpression4(
new DoubleExpression4(4),
new AdditionExpression4(
new DoubleExpression4(5),
new DoubleExpression4(6)
)
);
var sb = new StringBuilder();
var ep = new ExpressionPrinter4a();
//ep.Visit(e);
ep.Print((dynamic)e, sb);
Console.WriteLine(sb);
//var cal = new ExpressionCalculator();
//cal.Visit(e);
//Console.WriteLine($"{ep} = {cal.Result}");
}