protected OptionalParser(OptionalParser other, ParserCloneArgs chain)
: base(other, chain)
{
}
Parser Factor(Match match, bool isTerminal)
{
var primary = Primary(match["primary"], isTerminal);
var cardinality = match["cardinality"];
if (cardinality)
{
switch (cardinality.Text)
{
case "?":
primary = new OptionalParser(primary);
break;
case "*":
primary = new RepeatParser(primary, 0);
break;
case "+":
primary = new RepeatParser(primary, 1);
break;
default:
throw new FormatException(string.Format("Cardinality '{0}' is unknown", cardinality.Text));
break;
}
}
var integer = match["integer"];
if (integer)
return new RepeatParser(primary, Int32.Parse(integer.Text));
else
return primary;
}
protected OptionalParser(OptionalParser other, ParserCloneArgs chain)
: base(other, chain)
{
}