internal ActiveLabel(GrammarSequence sequence, int index = 0)
{
_sequence = sequence;
_index = index;
var sequenceTerms = sequence.Terms;
CurrentTerm = sequenceTerms.Skip(index).First();
WillComplete = sequenceTerms.Count() == index + 1;
var currentTerminal = CurrentTerm as Terminal;
if (currentTerminal != null)
{
TerminalLabel = new TerminalLabel(currentTerminal, sequence);
}
if (WillComplete)
{
CompleteLabel = new CompleteLabel(_sequence);
}
else
{
NextInChain = new ActiveLabel(sequence, index + 1);
}
}
internal TerminalEdge(TerminalLabel terminal, SourceContext startContext, TerminalMatch match)
: base(terminal, startContext, match.MatchEnd)
{
Match = match;
}
protected CompleteEdge(TerminalLabel terminalLabel, SourceContext startContext, SourceContext endContext)
: base(startContext, endContext)
{
Parent = terminalLabel.Terminal;
CompleteLabel = terminalLabel;
}