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AspClassic.Parser/ExternalLineMapping.cs

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+namespace AspClassic.Parser;
+
+/// <summary>
+/// A line mapping from a source span to an external file and line.
+/// </summary>
+public sealed class ExternalLineMapping
+{
+	private readonly Location _Start;
+
+	private readonly Location _Finish;
+
+	private readonly string _File;
+
+	private readonly long _Line;
+
+	/// <summary>
+	/// The start location of the mapping in the source.
+	/// </summary>
+	public Location Start => _Start;
+
+	/// <summary>
+	/// The end location of the mapping in the source.
+	/// </summary>
+	public Location Finish => _Finish;
+
+	/// <summary>
+	/// The external file the source maps to.
+	/// </summary>
+	public string File => _File;
+
+	/// <summary>
+	/// The external line number the source maps to.
+	/// </summary>
+	public long Line => _Line;
+
+	/// <summary>
+	/// Constructs a new external line mapping.
+	/// </summary>
+	/// <param name="start">The start location in the source.</param>
+	/// <param name="finish">The end location in the source.</param>
+	/// <param name="file">The name of the external file.</param>
+	/// <param name="line">The line number in the external file.</param>
+	public ExternalLineMapping(Location start, Location finish, string file, long line)
+	{
+		_Start = start;
+		_Finish = finish;
+		_File = file;
+		_Line = line;
+	}
+}