internal override TokenParseResult Execute <T>(IParser <T> parser, T token)
{
bool trim = reduceRule.ContainsOneNonterminal && parser.CanTrim(reduceRule);
T head = trim ? parser.PopToken() : parser.CreateReduction(reduceRule);
LalrActionGoto gotoAction = parser.TopState.GetActionBySymbol(reduceRule.RuleSymbol) as LalrActionGoto;
if (gotoAction == null)
{
Debug.Fail("Internal table error.");
return(TokenParseResult.InternalError);
}
parser.PushTokenAndState(head, gotoAction.State);
return(trim ? TokenParseResult.ReduceEliminated : TokenParseResult.ReduceNormal);
}