X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=tag-util.h;h=8a4074ce168feb22a5d0ae93d0849b6861e171a7;hp=4628f1630ad6263951b8672d5d43a6699281306a;hb=4e2c351c588ad74f4800ca0344232be90387c54a;hpb=f00c925bd10c024d5b9f88d8903c7a0d14e9cc6a

diff --git a/tag-util.h b/tag-util.h
index 4628f163..8a4074ce 100644
--- a/tag-util.h
+++ b/tag-util.h
@@ -89,6 +89,18 @@ tag_parse_status_t
 parse_tag_command_line (void *ctx, int argc, char **argv,
 			char **query_str, tag_op_list_t *ops);
 
+/*
+ * Test tags for some forbidden cases.
+ *
+ * Relax the checks if 'remove' is true to allow removal of previously
+ * added forbidden tags.
+ *
+ * return: NULL if OK,
+ *	   explanatory message otherwise.
+ */
+const char *
+illegal_tag (const char *tag, notmuch_bool_t remove);
+
 /*
  * Create an empty list of tag operations
  *