Major Section: SWITCHES-PARAMETERS-AND-MODES
Please first see return-last for background.
This table is for advanced users only, and requires an active trust
tag (see defttag). We recommend that you do not modify this table directly,
but instead use the macro
defmacro-last. See return-last for relevant
discussion. Here we augment that discussion with some highly technical
observations that can probably be ignored if you use
This table has a
:guard requiring that each key be a symbol defined
in raw Lisp, generally as a macro, and requiring that each non-
be associated with a symbol that names a macro defined in ACL2. The table
can only be modified when there is an active trust tag; see defttag. If a
key is associated with the value
nil, then that key is treated as though
it were not in the table.
Note that keys of this table are not eligible to be bound by
current value of this table may be obtained by evaluating the form
(table-alist 'return-last-table (w state)). The built-in constant
*initial-return-last-table* holds the initial value of this table.