private void RecordSimpleGroupingCapture(RegexSimpleGroupingNode node, RegexOptions options)
{
if (HasOption(options, RegexOptions.ExplicitCapture))
{
// Don't automatically add simple groups if the explicit capture option is on.
// Only add captures for 'CaptureGrouping' and 'BalancingGrouping' nodes.
return;
}
// Don't count a bogus (? node as a capture node. We only have this to keep our error
// messages in line with the native parser. i.e. even though the bogus (? code would
// cause an exception, we might get an earlier exception if there's a reference to
// this grouping. So if we note this grouping we'll end up not causing that error
// to happen, bringing out behavior out of sync with the native system.
var expr = node.Expression;
while (expr is RegexAlternationNode alternation)
{
expr = alternation.Left;
}
if (expr is RegexSequenceNode sequence &&
sequence.ChildCount > 0)
{
var leftMost = sequence.ChildAt(0);
if (leftMost.Node is RegexTextNode textNode &&
IsTextChar(textNode.TextToken, '?'))
{
return;
}
}
AddIfMissing(_captureNumberToSpan, list: null, _autoNumber++, GetGroupingSpan(node));
}
public void Visit(RegexSimpleGroupingNode node) => ClassifyGrouping(node);