public Language(string code, IEnumerable <TracableStream> dataSources)
{
this.Code = code;
foreach (var source in dataSources)
{
var parser = new IkadnParser(source.Stream);
parser.RegisterFactory(new ContextFactory());
parser.RegisterFactory(new SingleLineFactory());
parser.RegisterFactory(new TextBlockFactory());
parser.RegisterFactory(new ExpressionTextFactory());
parser.RegisterFactory(new ConditionalTextFactory());
try
{
while (parser.HasNext())
{
var conext = parser.ParseNext().To <Context>();
contexts.Add((string)conext.Tag, conext);
}
}
catch (IOException e)
{
throw new IOException(source.SourceInfo, e);
}
catch (FormatException e)
{
throw new FormatException(source.SourceInfo, e);
}
}
}
public IkadnBaseObject Parse(IkadnParser parser)
{
parser.Reader.SkipWhiteSpaces();
string expressionText = parser.Reader.ReadUntil(EndingChar);
parser.Reader.Read();
if (expressionText.Length == 0)
{
throw new FormatException("Expression at " + parser.Reader + " is empty (zero length)");
}
ExpressionParser expressionParser = new ExpressionParser(expressionText);
expressionParser.Parse();
if (expressionParser.errors.count > 0)
{
throw new FormatException("Invalid expression at " + parser.Reader + ". Errors: " + expressionParser.errors.errorMessages);
}
if (!parser.HasNext())
{
throw new FormatException("IKON value expected at " + parser.Reader.PositionDescription);
}
if (expressionParser.ParsedFormula.Variables.Count == 0)
{
throw new FormatException("Condition expression at " + parser.Reader + " is constant. If intentional, use format witout condition.");
}
return(new ConditionalText(expressionParser.ParsedFormula, parser.ParseNext().To <IText>()));
}