/**
* Returns a result if the specified symbol matchs the left and right context of the Rule
*
*
*/
public override Word Rewrite(Symbol symbol, int SymbolIndex, Word word)
{
//check if that rule could be applied for the specified symbol
if (predecessor.Equals(symbol))
{
//TODO: use regex
//string sPattern = "^\\d{3}-\\d{3}-\\d{4}$";
//if(System.Text.RegularExpressions.Regex.IsMatch(s, sPattern)
//check if the context matches
String symbolLeft = word.ToString().Substring(0, SymbolIndex);
String symbolRight = word.ToString().Substring(SymbolIndex, word.ToString().Length - 1);
if (symbolLeft.EndsWith(leftContext.ToString()) && symbolRight.StartsWith(rightContext.ToString()))
{
return(successor);
}
else
{
return(null);//context do not matches
}
}
else
{
//throw new System.InvalidOperationException("This rule is not meant to be used with symbol: " + Symbol);
return(null);
}
}
public override String ToString()
{
StringBuilder LSystemDescription = new StringBuilder();
LSystemDescription.AppendLine("LSystem")
.Append("Axiom: ").AppendLine(Axiom.ToString())
.AppendLine("Production Rules: ");
//describe rules used
foreach (ProductionRule rule in ProductionRules)
{
LSystemDescription.AppendLine(rule.ToString());
}
//print out the generated language
foreach (Word word in words)
{
LSystemDescription.AppendLine(word.ToString());
}
return(LSystemDescription.ToString());
}
public override String ToString()
{
StringBuilder ruleDescription = new StringBuilder();
ruleDescription.Append(predecessor.ToString()).Append(" = ").Append(successor.ToString());
return ruleDescription.ToString();
}