public ParseNode_Base Recover(SyntaxTreeBuilder pSyntaxTreeBuilder, out int numMissing)
{
numMissing = 0;
var current = this;
while (current.parent != null)
{
var next = current.parent.NextAfterChild(current, pSyntaxTreeBuilder);
if (next == null)
{
break;
}
var nextId = next as ParseNode_Id;
if (nextId != null && nextId.Name == "attribute")
{
return(nextId);
}
var nextMatchespSyntaxTreeBuilder = next.Matches(pSyntaxTreeBuilder);
while (next != null && !nextMatchespSyntaxTreeBuilder && next.FirstSet.ContainsEmpty())
{
next = next.parent.NextAfterChild(next, pSyntaxTreeBuilder);
nextMatchespSyntaxTreeBuilder = next != null && next.Matches(pSyntaxTreeBuilder);
}
if (nextMatchespSyntaxTreeBuilder && pSyntaxTreeBuilder.TokenScanner.Current.text == ";" && next is ParseNode_Many_Opt)
{
return(null);
}
++numMissing;
if (nextMatchespSyntaxTreeBuilder)
{
if (pSyntaxTreeBuilder.TokenScanner.Current.text == "{" ||
pSyntaxTreeBuilder.TokenScanner.Current.text == "}" ||
pSyntaxTreeBuilder.PreCheck(next, 3))//next.Scan(clone))
{
return(next);
}
}
if (numMissing <= 1 && pSyntaxTreeBuilder.TokenScanner.Current.text != "{" && pSyntaxTreeBuilder.TokenScanner.Current.text != "}")
{
//TODO using
var lapSyntaxTreeBuilder = pSyntaxTreeBuilder.Clone();
if (lapSyntaxTreeBuilder.TokenScanner.MoveNext() && next.Matches(lapSyntaxTreeBuilder) && lapSyntaxTreeBuilder.PreCheck(next, 3))
{
return(null);
}
}
current = next;
}
return(null);
}
public virtual bool CheckPredicate(SyntaxTreeBuilder pSyntaxTreeBuilder)
{
//if (debug)
//{
// var s = pSyntaxTreeBuilder.Clone();
// Debug.Log(s.Current.tokenKind + " " + s.Current.text);
// s.MoveNext();
// Debug.Log(s.Current.tokenKind + " " + s.Current.text);
//}
if (predicate != null)
{
return(predicate(pSyntaxTreeBuilder));
}
else if (nodePredicate != null)
{
return(pSyntaxTreeBuilder.PreCheck(nodePredicate));//, new GoalAdapter());
}
return(false);
}
