public override void AddPattern(ProductionPattern pattern)
{
var flag = pattern.IsMatchingEmpty();
if (flag)
{
throw new ParserCreationException(ParserCreationException.ErrorType.INVALID_PRODUCTION, pattern.Name,
"zero elements can be matched (minimum is one)");
}
var flag2 = pattern.IsLeftRecursive();
if (flag2)
{
throw new ParserCreationException(ParserCreationException.ErrorType.INVALID_PRODUCTION, pattern.Name,
"left recursive patterns are not allowed");
}
base.AddPattern(pattern);
}
