private Stack <TraceryNode[]> GetRulesStack(string key)
{
// TODO: Put this magic values (random, repeat and discreate), as constants somewhere
if (key.StartsWith("random"))
{
Stack <TraceryNode[]> s = new Stack <TraceryNode[]>();
TraceryNode[] array = new TraceryNode[1];
array[0] = new RandomNode(key);
s.Push(array);
return(s);
}
if (key.StartsWith("discrete"))
{
Stack <TraceryNode[]> s = new Stack <TraceryNode[]>();
TraceryNode[] array = new TraceryNode[1];
array[0] = new DiscreteNode(key);
s.Push(array);
return(s);
}
Stack <TraceryNode[]> stack;
if (!symbols.TryGetValue(key, out stack))
{
throw new Exception("No registered symbol named " + key);
}
return(stack);
}
public TraceryNode Parse()
{
PushContext();
IList <TraceryNode> nodes = new List <TraceryNode>();
while (!Eof())
{
switch (CurrentChar())
{
case '<':
Advance();
int startIndex = rawRule.IndexOf(' ', pos);
int endIndex = rawRule.IndexOf('>', pos);
string strCount = rawRule.Substring(pos, startIndex - pos);
int count;
bool parseSuccess = int.TryParse(strCount, out count);
if (!parseSuccess)
{
string newCount = Tracery.g_Grammar.Flatten(strCount);
count = int.Parse(newCount);
}
// Skip the space
startIndex += 1;
string sub = rawRule.Substring(startIndex, endIndex - startIndex);
Parser repeatParser = new Parser(sub);
TraceryNode toRepeat = repeatParser.Parse();
for (int i = 0; i < count; i++)
{
nodes.Add((TraceryNode)toRepeat.Clone());
}
bool reached = false;
while (!reached)
{
if (CurrentChar() == '>')
{
reached = true;
}
Advance();
}
break;
case '[':
nodes.Add(ParseAction());
break;
case '#':
nodes.Add(ParseTag());
break;
default:
nodes.Add(ParsePlaintext());
break;
}
}
return(new RuleNode(nodes.ToArray(), PopContext()));
}
public string Flatten(string rawRule)
{
TraceryNode rule = Tracery.ParseRule(rawRule);
return(rule.Flatten(this));
}