public override MatchResult?MatchStep(MatchStack stack, MatchFrame frame, TokenQueue q)
{
if (!frame.ProdMatched)
{
if (_prod == null)
{
_prod = SqliteGrammar.Prods[ProdName];
}
stack.Push(_prod);
frame.ProdMatched = true;
return(null);
}
else
{
return(frame.SubResult);
}
}
public void Clear(bool all = true)
{
if (all)
{
ProdStartLoc = 0;
Prod = null;
TermIndex = 0;
AstProd = null;
}
OptionalState = OptionalTermState.Start;
OptionalStartLoc = 0;
OrState = OrTermState.Start;
OrProdIndex = 0;
OrStartLoc = 0;
ProdMatched = false;
ListState = ListTermState.Start;
ListCount = 0;
ListSeparatorStartLoc = 0;
SubResult.ErrorMessage = "Uninitialized result";
SubResult.IsMatch = false;
}
public MatchFrame Push(SpecProd prod)
{
if (prod == null)
{
throw new ArgumentNullException("prod");
}
_topIndex++;
if (_topIndex == _frames.Count)
{
_frames.Add(new MatchFrame());
}
_frames[_topIndex].Prod = prod;
_frames[_topIndex].ProdStartLoc = Queue.GetLocation();
_frames[_topIndex].AstProd = new Ast.SqliteSyntaxProduction {
Name = prod.Name
};
return(_frames[_topIndex]);
}