private bool LeoReducer(EarleyItem completed, int setNumber) { int position = completed.GetOrignPosition(); Symbol lhs = completed.GetRule().GetLeftHandSideOfRule(); EarleySet set = Sets[position]; LeoItem transitiveItem = set.FindLeoItemBySymbol(lhs); if (transitiveItem == null) { return(false); } EarleyItem newEarleyItem = new EarleyItem( setNumber, transitiveItem.GetDottedRule(), transitiveItem.GetOrignPosition() ); EarleyItem current = Sets[transitiveItem.GetOrignPosition()].GetEarleyItemList() .Find(el => el.GetDottedRule().Equals(transitiveItem.GetDottedRule()) && el.GetOrignPosition() == transitiveItem.GetOrignPosition()); if (current.GetCurrentPrevSymbolList() != null && current.GetCurrentPrevSymbolList().Count > 0) { newEarleyItem.AddPredecessorLink(current, position); } newEarleyItem.AddReducerLink(completed, position); AddToSet( newEarleyItem, setNumber, "LeoReducer" ); return(true); }
private LeoItem FindLeoItemPredecessor(EarleyItem earleyItem) { EarleySet predecessorSet = Sets[earleyItem.GetOrignPosition()]; return(predecessorSet.FindLeoItemBySymbol(earleyItem.GetRule().GetLeftHandSideOfRule())); }