- random-state
Using it as an argument to the function random.
- cons
Changing the car1 or cdr1 of the cons,
or performing a destructive operation on an object which is either
the car2 or the cdr2 of the cons.
- array
Storing a new value into some element of the array,
or performing a destructive operation
on an object that is already such an element.
Changing the fill pointer, dimensions, or displacement of
the array (regardless of whether the array is actually adjustable).
Performing a destructive operation on another array
that is displaced to the array or that otherwise shares its contents
with the array.
- hash-table
Performing a destructive operation on any key.
Storing a new value4 for any key,
or performing a destructive operation
on any object that is such a value.
Adding or removing entries from the hash table.
- structure-object
Storing a new value into any slot,
or performing a destructive operation on an object
that is the value of some slot.
- standard-object
Storing a new value into any slot,
or performing a destructive operation on an object
that is the value of some slot.
Changing the class of the object (e.g., using the function change-class).
- readtable
Altering the readtable case.
Altering the syntax type of any character in this readtable.
Altering the reader macro function associated with any character
in the readtable, or altering the reader macro functions
associated with characters defined as dispatching macro characters
in the readtable.
- stream
Performing I/O operations on the stream,
or closing the stream.
- All other standardized types
[This category includes, for example, character,
condition,
function,
method-combination,
method,
number,
package,
pathname,
restart,
and symbol.]
There are no standardized destructive operations
defined on objects of these types.
3 Evaluation and Compilation