public static void Invoke()
{
var additionExpression = new AdditionExpression(new DoubleExpression(10), new AdditionExpression(new DoubleExpression(11), new DoubleExpression(12)));
var printerExpression = new StringBuilder();
additionExpression.Print_Internal(printerExpression);
Console.WriteLine("Internal Print : " + printerExpression);
printerExpression.Clear();
ClassicExpressionPrinter.Print_ConditionalMethod(additionExpression, printerExpression);
Console.WriteLine("ConditionalMethod : " + printerExpression);
var expressionPrinter = new ExpressionPrinter();
expressionPrinter.Visit(additionExpression);
expressionPrinter.Clear();
expressionPrinter.Print(additionExpression);
Console.WriteLine("Classic Visitor : " + expressionPrinter);
var expressionCalculator = new ExpressionCalculator();
expressionCalculator.Visit(additionExpression);
Console.WriteLine("Classic Visitor : " + expressionPrinter + "=" + expressionCalculator);
var expressionPrinter1 = new GenericExpressionPrinter();
expressionPrinter1.Visit(additionExpression);
Console.WriteLine("Generic Visitor : " + expressionPrinter1);
var expressionCalculator1 = new GenericExpressionCalculator();
expressionCalculator1.Visit(additionExpression);
Console.WriteLine("Generic Visitor : " + expressionPrinter1 + "=" + expressionCalculator1);
}
public void Visit(AdditionExpression visitable)
{
sb.Append("(");
visitable.Left.Accept((IVisitor)this);
sb.Append(" + ");
visitable.Right.Accept((IVisitor)this);
sb.Append(")");
}
/// <summary>
/// since dynamic is used if any of Expression is passed which is not part of Print(T) then runtime crash will occur
/// and it has performance impact
/// </summary>
/// <param name="additionExpression"></param>
public void Print(AdditionExpression additionExpression)
{
sb.Append("(");
Print((dynamic)additionExpression.Left);
sb.Append(" + ");
Print((dynamic)additionExpression.Right);
sb.Append(")");
}
public void Visit(AdditionExpression additionExpression)
{
sb.Append("(");
additionExpression.Left.Accept((IExpressionVisitor)this);
sb.Append(" + ");
additionExpression.Right.Accept((IExpressionVisitor)this);
sb.Append(")");
}
public void Visit(AdditionExpression visitable)
{
visitable.Left.Accept((IVisitor)this);
var leftResult = Result;
visitable.Right.Accept((IVisitor)this);
var rightResult = Result;
Result = leftResult + rightResult;
}
public void Visit(AdditionExpression additionExpression)
{
additionExpression.Left.Accept((IExpressionVisitor)this);
var leftResult = Result;
additionExpression.Right.Accept((IExpressionVisitor)this);
var rightResult = Result;
Result = leftResult + rightResult;
}
