public IkadnBaseObject Parse(IkadnReader reader)
{
reader.SkipWhiteSpaces();
char formatterType = reader.Read();
string formatterParameter = reader.ReadWhile(c => !char.IsWhiteSpace(c));
Func <double, string> formatter;
switch (formatterType)
{
case 'd':
case 'D':
formatter = new DecimalsFormatter(0,
formatterParameter.Length > 0 ? int.Parse(formatterParameter, CultureInfo.InvariantCulture) : 0
).Format;
break;
case 't':
case 'T':
formatter = (
(formatterParameter == AutomaticThousands) ?
new ThousandsFormatter() :
new ThousandsFormatter(formatterParameter)
).Format;
break;
default:
throw new FormatException("Unexpected expression formatter: " + formatterType);
}
reader.SkipWhiteSpaces();
string expressionText = reader.ReadUntil(EndingChar);
reader.Read();
if (expressionText.Length == 0)
{
throw new FormatException("Expression at " + reader.PositionDescription + " is empty (zero length)");
}
var expParser = new ExpressionParser(expressionText);
expParser.Parse();
if (expParser.errors.count > 0)
{
throw new FormatException("Expression at " + reader.PositionDescription + " is invalid: " + expParser.errors.errorMessages);
}
//TODO(later) substitute subformulas
return(new ExpressionText(expParser.ParsedFormula, formatter));
}
protected override IkadnBaseObject ParseObject(IkadnReader reader)
{
reader.SkipWhiteSpaces();
return(new IkonText(reader.ReadWhile(x => !char.IsWhiteSpace(x)).Trim()));
}
