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AspClassic.Parser/CommaDelimitedTreeCollection.cs

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+#define DEBUG
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Diagnostics;
+
+namespace AspClassic.Parser;
+
+/// <summary>
+/// A collection of trees that are delimited by commas.
+/// </summary>
+public abstract class CommaDelimitedTreeCollection<T> : TreeCollection<T> where T : Tree
+{
+	private readonly ReadOnlyCollection<Location> _CommaLocations;
+
+	/// <summary>
+	/// The location of the commas in the list.
+	/// </summary>
+	public ReadOnlyCollection<Location> CommaLocations => _CommaLocations;
+
+	protected CommaDelimitedTreeCollection(TreeType type, IList<T> trees, IList<Location> commaLocations, Span span)
+		: base(type, trees, span)
+	{
+		Debug.Assert(type >= TreeType.ArgumentCollection && type <= TreeType.ImportCollection);
+		if (commaLocations != null && commaLocations.Count > 0)
+		{
+			_CommaLocations = new ReadOnlyCollection<Location>(commaLocations);
+		}
+	}
+}