internal OptionalNode(PatternNode node)
{
CheckValue(node, nameof(node));
Node = node is OptionalNode optionalNode
? optionalNode.Node
: node;
}
private Regex BuildCore(PatternNode pattern, bool exactMatch)
{
Visit(pattern);
if (exactMatch)
{
builder.AppendDollar();
}
return(RegexFactory.Create(builder.ToString()));
}
private ISet <string> ExtractCore(PatternNode node)
{
Visit(node);
return(names);
}
internal static ISet <string> Extract(PatternNode node) => new VariableNamesExtractor().ExtractCore(node);
internal static Regex Build(PatternNode pattern, bool exactMatch) => new PatternRegexBuilder().BuildCore(pattern, exactMatch);