public ParserStackItem Step()
{
var stateNumber = State.StateStack.Peek();
var operation = ParseTable.Lookup(stateNumber, State.InputStack.Count > 0 ? State.InputStack.Peek() : null);
operation.Apply(this.State);
if (operation is ParserReduceOp && (operation as ParserReduceOp).Index == -1)
{
// Done!
return(State.InputStack.Pop());
}
else
{
return(null);
}
}
public Parser(ParseTable table, IEnumerable <TokenizedItem> tokens)
{
ParseTable = table;
State = new ParserState(tokens);
}