private void Actor(AST node)
{
Console.Write(" Adding actor " + node.Token.Text);
_currentActor = _world.CreateActor(node.Token.Text);
node.Children.ForEach(n => Build(n));
Console.WriteLine("");
}
protected void AddCurrentTokenAndSetAsCurrentNode(int tokenType)
{
var newNode = new AST(CurrentToken);
_currentNode.Children.Add(newNode);
_currentNode = newNode;
Match(tokenType);
}
private void AddEventActions(EventAction<EventState> eventAction, AST whenNode)
{
for (int i = 1; // Skip first, which is event type
i < whenNode.Children.Count; i++)
{
eventAction.Add(GetAction(whenNode.Children[i]));
}
}
private string GetDisplayText(AST node)
{
string tokenName = Tokens.TokenNames[node.Token.Type];
string tokenText = node.Token.Text.Replace('"', '\'');
if (string.IsNullOrEmpty(tokenText) || tokenName.Equals(tokenText.ToUpper()))
return string.Format("\"{0}: {1}\"", _id.Next(), tokenName);
else
return string.Format("\"{0}: {1} \\\"{2}\\\"\"", _id.Next(), tokenName, tokenText);
}
public static string ToString(AST node)
{
if (node.Children.Count > 0)
{
var children = node.Children.Aggregate("", (acc, cn) => acc + ToString(cn));
return string.Format(" ({0}{1})", node.Token, children);
}
else
return " " + node.Token;
}
public void Build(AST node)
{
switch (node.Token.Type)
{
case Tokens.PROGRAM: Program(node); break;
case Tokens.WHEN: When(node); break;
case Tokens.COUNT: Count(node); break;
default:
break;
}
}
private void AddNode(AST node)
{
node.Children.ForEach(c =>
{
_dot.AppendFormat("{0}->{1};{2}",
node.Token.Text,
c.Token.Text,
Environment.NewLine);
AddNode(c);
});
}
public string ToDot(AST node)
{
_id = new IntGenerator();
RewriteTree(node);
_dot = new StringBuilder();
_dot.AppendLine("digraph { ");
_dot.AppendLine("node [color=black, style=filled, fillcolor=wheat]");
AddNode(node);
_dot.AppendLine("}");
return _dot.ToString();
}
private Action<EventState> GetAction(AST line)
{
switch (line.Token.Type)
{
case Tokens.PRINT:
var print = PrintAction.Create(line);
return state => print.Execute(state);
case Tokens.PING:
return state => state.World.Ping(line.Children[0].Token.Text);
case Tokens.WAIT:
int sleepInMilliseconds = Int32.Parse(line.Children[0].Token.Text) * Unit(line.Children[1].Token.Text);
return state => Thread.Sleep(sleepInMilliseconds);
case Tokens.SEND:
var send = SendAction.Create(line);
return state => send.Execute();
case Tokens.RESET:
return state => state.Self.ResetCounter();
default:
throw new Exception("Unrecognized action " + line.Token);
}
}
public static PrintAction Create(AST printNode)
{
var p = new PrintAction();
printNode.Children.ForEach(node =>
{
switch (node.Token.Type)
{
case Tokens.STRING:
p.AddPrint(state => Console.Write(node.Token.TextWithoutQuotes()));
break;
case Tokens.COUNTER:
p.AddPrint(state => Console.Write(state.Self.Counter));
break;
case Tokens.INT:
p.AddPrint(state => Console.Write(node.Token.Text));
break;
//TODO: add message ..
}
});
return p;
}
private void RewriteTree(AST node)
{
node.Token.Text = GetDisplayText(node);
node.Children.ForEach(c => RewriteTree(c));
}
private void WhenCounter(AST node)
{
Console.Write(" with counter event ");
if(node.Children[0].Children[0].Token.Type != Tokens.GT)
throw new Exception("Only supports 'greater then' counter predicate at the moment!");
if(node.Children[0].Children[1].Token.Type != Tokens.INT)
throw new Exception("Last argument to counter event predicate must be an integer!");
var intArg = Int32.Parse(node.Children[0].Children[1].Token.Text);
_currentActor.WhenCounter = counter => counter > intArg;
AddEventActions(_currentActor.OnCounter, node);
}
private void When(AST node)
{
var eventType = node.Children.First();
switch (eventType.Token.Type)
{
case Tokens.STARTING: WhenStarting(node); break;
case Tokens.PINGED: WhenPinged(node); break;
case Tokens.COUNTER: WhenCounter(node); break;
default:
break;
}
}
private void WhenStarting(AST node)
{
Console.Write(" with starting event ");
AddEventActions(_currentActor.OnStart, node);
}
private void WhenPinged(AST node)
{
Console.Write(" with pinged event ");
AddEventActions(_currentActor.OnPing, node);
}
protected void SetRoot(Token root)
{
AST = new AST(root);
_currentNode = AST;
}
protected void PreserveCurrentNode(Action a)
{
var tempNode = _currentNode;
a.Invoke();
_currentNode = tempNode;
}
private void Program(AST node)
{
node.Children.ForEach(n => Actor(n));
}
public static SendAction Create(AST sendNode)
{
return new SendAction(
Int32.Parse(sendNode.Children[1].Token.Text),
sendNode.Children[0].Token.Text);
}
private void Count(AST node)
{
int countInMilliseconds = Int32.Parse(node.Children[0].Token.Text) * Unit(node.Children[1].Token.Text);
_currentActor.CountEvery(countInMilliseconds);
}