X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=lib%2Fnotmuch.h;h=92594b9dad9e4110e41ca29ef82266d6be821426;hp=dae041640fdb2abb9d0a53e4d69540d2bdbf6054;hb=bc9c50602d20ce712188ea2cc3c5d30647d4d3f5;hpb=d99491f27440d83f937131a861ca547bffb8bdf1

diff --git a/lib/notmuch.h b/lib/notmuch.h
index dae04164..92594b9d 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -1221,7 +1221,14 @@ notmuch_message_get_filenames (notmuch_message_t *message);
  */
 typedef enum _notmuch_message_flag {
     NOTMUCH_MESSAGE_FLAG_MATCH,
-    NOTMUCH_MESSAGE_FLAG_EXCLUDED
+    NOTMUCH_MESSAGE_FLAG_EXCLUDED,
+
+    /* This message is a "ghost message", meaning it has no filenames
+     * or content, but we know it exists because it was referenced by
+     * some other message.  A ghost message has only a message ID and
+     * thread ID.
+     */
+    NOTMUCH_MESSAGE_FLAG_GHOST,
 } notmuch_message_flag_t;
 
 /**