db/simple/ExportedSong: new class

src/db/plugins/simple/ExportedSong.hxx

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2003-2021 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MPD_DB_SIMPLE_EXPORTED_SONG_HXX
+#define MPD_DB_SIMPLE_EXPORTED_SONG_HXX
+
+#include "song/LightSong.hxx"
+
+/**
+ * The return type for Song::Export().  In addition to implementing
+ * #LightSong, it hold allocations necessary to represent the #Song as
+ * a #LightSong, e.g. a merged #Tag.
+ */
+class ExportedSong : public LightSong {
+public:
+	using LightSong::LightSong;
+};
+
+#endif