12.16.4.12 Multifield Slot Functions

The following functions allow convenient manipulation of multifield slots. There are three types of functions: replacing a range of fields with one or more new values, inserting one or more new values at an arbitrary point, and deleting a range of fields. For each type, there are two forms of functions: an external interface which sets the new value for the multifield slot with a put- message (see section 9.3.3.9), and an internal interface that can only be called from message-handlers which sets the slot for the active instance (see section 9.4.1.1) directly. Both forms read the original value of the slot directly without the use of a get- message. All of these functions return the new slot value on success and the symbol FALSE on errors.

12.16.4.12.1 Replacing Fields