public void Visit(MethCall methCall)
{
Console.Write($"{methCall.TurtleName}.{methCall.MethName}");
Console.Write("(");
methCall.Argument?.Accept(this);
Console.Write(")");
}
public void Visit(MethCall methCall)
{
if (Environment.GetItem(methCall.TurtleName) is TurtleItem turle)
{
// Check for arguments
if (methCall.Argument != null)
{
methCall.Argument.Accept(this);
dynamic arg = Environment.PopFromTheStack();
// Color or identifier
if (arg is string)
{
if (!(arg == "Black" || arg == "Red" || arg == "Green" || arg == "Blue"))
{
arg = Environment.GetItem(arg).Value;
}
}
// Built-in methods with arguments
switch (methCall.MethName)
{
case "Forward":
turle.Forward(arg);
break;
case "Backward":
turle.Backward(arg);
break;
case "Right":
turle.Right(arg);
break;
case "Left":
turle.Left(arg);
break;
case "LineColor":
turle.LineColor(arg);
break;
case "LineThickness":
turle.LineThickness(arg);
break;
default:
throw new ExecutorException($"No built-in method called {methCall.MethName} found");
}
}
else
{
// Built-in methods with no arguments
switch (methCall.MethName)
{
case "PenUp":
turle.PenUp();
break;
case "PenDown":
turle.PenDown();
break;
default:
throw new ExecutorException($"No built-in method called {methCall.MethName} found");
}
}
}
else
{
throw new ExecutorException($"Method with the name: {methCall} can only be applied on Turtle object");
}
}