private IEnumerable <RuleMatch> RecurseMatch(
// Used only for debugging purposes, to hook on the context ID of the entire sequence
int masterContextID,
ExplorerContext context,
SubString originalText,
int totalMatchLength,
int iteration,
ImmutableList <RuleMatch> childrenMatches)
{
var matches = context.InvokeRule(_rule);
var nonEmptyMatches = matches.Where(m => m.Text.Length != 0);
foreach (var match in nonEmptyMatches)
{
var newTotalMatchLength = totalMatchLength + match.LengthWithInterleaves;
var newChildrenMatches = childrenMatches.Add(match);
if (IsRepeatCountBelowMaximum(iteration + 1))
{ // Recurse to next iteration
var newContext = context.MoveForward(match);
var downstreamMatches = RecurseMatch(
masterContextID,
newContext,
originalText,
newTotalMatchLength,
iteration + 1,
newChildrenMatches);
foreach (var m in downstreamMatches)
{
yield return(m);
}
}
// We are returning the matches in decreasing order of text length, so the "current" one goes last
if (IsRepeatCountInRange(iteration))
{
var matchText = originalText.Take(newTotalMatchLength);
var completeMatch = new RuleMatch(
this,
matchText,
() => ComputeOutput(matchText, newChildrenMatches));
yield return(completeMatch);
}
}
}