notmuch_sys::notmuch_messages_collect_tags
[−]
[src]
pub unsafe extern fn notmuch_messages_collect_tags(messages: *mut notmuch_messages_t) -> *mut notmuch_tags_t
Return a list of tags from all messages.
The resulting list is guaranteed not to contain duplicated tags.
WARNING: You can no longer iterate over messages after calling this function, because the iterator will point at the end of the list. We do not have a function to reset the iterator yet and the only way how you can iterate over the list again is to recreate the message list.
The function returns NULL on error.