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AspClassic.Parser/DeclarationCollection.cs

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+using System;
+using System.Collections.Generic;
+
+namespace AspClassic.Parser;
+
+/// <summary>
+/// A read-only collection of declarations.
+/// </summary>
+public sealed class DeclarationCollection : ColonDelimitedTreeCollection<Declaration>
+{
+	/// <summary>
+	/// Constructs a new collection of declarations.
+	/// </summary>
+	/// <param name="declarations">The declarations in the collection.</param>
+	/// <param name="colonLocations">The locations of the colons in the collection.</param>
+	/// <param name="span">The location of the parse tree.</param>
+	public DeclarationCollection(IList<Declaration> declarations, IList<Location> colonLocations, Span span)
+		: base(TreeType.DeclarationCollection, declarations, colonLocations, span)
+	{
+		if ((declarations == null || declarations.Count == 0) && (colonLocations == null || colonLocations.Count == 0))
+		{
+			throw new ArgumentException("DeclarationCollection cannot be empty.");
+		}
+	}
+}