public Grammar GrammarFromText(string content)
{
var result = new Grammar();
var helper = new SubstitutionHelper();
content = content.Replace("\r\n", "\n");
var lines = content.Split('\n');
var lineCount = 0;
foreach (var line in lines)
{
lineCount++;
if (string.IsNullOrWhiteSpace(line) || line.StartsWith("#"))
{
continue;
}
if (!line.Contains(":"))
{
throw new TinyGrammarException(string.Format("Error on line {0}: missing \":\".", lineCount));
}
var symbolEndPosition = line.IndexOf(":");
var symbolName = line.Substring(0, symbolEndPosition);
var sentenceExpression = line.Substring(symbolEndPosition + 1, line.Length - 1 - symbolEndPosition);
sentenceExpression = helper.HandleSpecialCharacters(sentenceExpression);
foreach (var altSentenceExpression in helper.GetAlternativeExpressions(sentenceExpression))
{
result.AddSubstitution(
helper.CleanupSymbolName(symbolName),
helper.UnHandleSpecialCharacters(altSentenceExpression)
);
}
}
return(result);
}
public Sentence(string expression)
{
_helper = new SubstitutionHelper();
Expression = _helper.HandleSpecialCharacters(expression);
}