/// <summary>
/// Constructor for base class
/// </summary>
/// <param name="scanner">Scanner instance for this parser</param>
protected ShiftReduceParser(AbstractScanner <TValue, TSpan> scanner)
{
this.Scanner = scanner;
StateStack = new PushdownPrefixState <State>();
ValueStack = new PushdownPrefixState <TValue>();
LocationStack = new PushdownPrefixState <TSpan>();
}