Type Definition melib::backends::notmuch::bindings::notmuch_message_count_properties

type notmuch_message_count_properties = unsafe extern "C" fn(message: *mut notmuch_message_t, key: *const c_char, count: *mut c_uint) -> notmuch_status_t;

Return the number of properties named "key" belonging to the specific message.

@param[in] message The message to examine @param[in] key key to count @param[out] count The number of matching properties associated with this message.

@returns

NOTMUCH_STATUS_SUCCESS: successful count, possibly some other error.

@since libnotmuch 5.2 (notmuch 0.27)